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f56654c4 TM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * xattr.c | |
5 | * | |
c3cb6827 | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 7 | * |
cf1d6c76 | 8 | * CREDITS: |
c3cb6827 TY |
9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
cf1d6c76 | 11 | * |
f56654c4 TM |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public | |
c3cb6827 | 14 | * License version 2 as published by the Free Software Foundation. |
f56654c4 TM |
15 | * |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
f56654c4 TM |
20 | */ |
21 | ||
cf1d6c76 TY |
22 | #include <linux/capability.h> |
23 | #include <linux/fs.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/pagemap.h> | |
28 | #include <linux/uio.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/splice.h> | |
31 | #include <linux/mount.h> | |
32 | #include <linux/writeback.h> | |
33 | #include <linux/falloc.h> | |
01225596 | 34 | #include <linux/sort.h> |
99219aea MF |
35 | #include <linux/init.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
923f7f31 | 38 | #include <linux/security.h> |
cf1d6c76 | 39 | |
f56654c4 TM |
40 | #include <cluster/masklog.h> |
41 | ||
42 | #include "ocfs2.h" | |
43 | #include "alloc.h" | |
d6b32bbb | 44 | #include "blockcheck.h" |
f56654c4 TM |
45 | #include "dlmglue.h" |
46 | #include "file.h" | |
cf1d6c76 TY |
47 | #include "symlink.h" |
48 | #include "sysfile.h" | |
f56654c4 TM |
49 | #include "inode.h" |
50 | #include "journal.h" | |
51 | #include "ocfs2_fs.h" | |
52 | #include "suballoc.h" | |
53 | #include "uptodate.h" | |
54 | #include "buffer_head_io.h" | |
0c044f0b | 55 | #include "super.h" |
cf1d6c76 | 56 | #include "xattr.h" |
492a8a33 | 57 | #include "refcounttree.h" |
0fe9b66c | 58 | #include "acl.h" |
402b4183 | 59 | #include "ocfs2_trace.h" |
cf1d6c76 TY |
60 | |
61 | struct ocfs2_xattr_def_value_root { | |
62 | struct ocfs2_xattr_value_root xv; | |
63 | struct ocfs2_extent_rec er; | |
64 | }; | |
65 | ||
0c044f0b | 66 | struct ocfs2_xattr_bucket { |
ba937127 JB |
67 | /* The inode these xattrs are associated with */ |
68 | struct inode *bu_inode; | |
69 | ||
70 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 71 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
72 | |
73 | /* How many blocks make up one bucket for this filesystem */ | |
74 | int bu_blocks; | |
0c044f0b TM |
75 | }; |
76 | ||
78f30c31 | 77 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 78 | handle_t *handle; |
78f30c31 TM |
79 | struct ocfs2_alloc_context *meta_ac; |
80 | struct ocfs2_alloc_context *data_ac; | |
81 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
5f5261ac | 82 | int set_abort; |
78f30c31 TM |
83 | }; |
84 | ||
cf1d6c76 TY |
85 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
86 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 87 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
88 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
89 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 90 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
91 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
92 | - sizeof(struct ocfs2_xattr_block) \ | |
93 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 94 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
95 | |
96 | static struct ocfs2_xattr_def_value_root def_xv = { | |
97 | .xv.xr_list.l_count = cpu_to_le16(1), | |
98 | }; | |
99 | ||
537d81ca | 100 | const struct xattr_handler *ocfs2_xattr_handlers[] = { |
cf1d6c76 | 101 | &ocfs2_xattr_user_handler, |
702e5bc6 CH |
102 | &posix_acl_access_xattr_handler, |
103 | &posix_acl_default_xattr_handler, | |
cf1d6c76 | 104 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 105 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
106 | NULL |
107 | }; | |
108 | ||
537d81ca | 109 | static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 | 111 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
702e5bc6 | 112 | = &posix_acl_access_xattr_handler, |
929fb014 | 113 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] |
702e5bc6 | 114 | = &posix_acl_default_xattr_handler, |
cf1d6c76 | 115 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 116 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
117 | }; |
118 | ||
119 | struct ocfs2_xattr_info { | |
6b240ff6 JB |
120 | int xi_name_index; |
121 | const char *xi_name; | |
18853b95 | 122 | int xi_name_len; |
6b240ff6 JB |
123 | const void *xi_value; |
124 | size_t xi_value_len; | |
cf1d6c76 TY |
125 | }; |
126 | ||
127 | struct ocfs2_xattr_search { | |
128 | struct buffer_head *inode_bh; | |
129 | /* | |
130 | * xattr_bh point to the block buffer head which has extended attribute | |
131 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
132 | */ | |
133 | struct buffer_head *xattr_bh; | |
134 | struct ocfs2_xattr_header *header; | |
ba937127 | 135 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
136 | void *base; |
137 | void *end; | |
138 | struct ocfs2_xattr_entry *here; | |
139 | int not_found; | |
140 | }; | |
141 | ||
11179f2c JB |
142 | /* Operations on struct ocfs2_xa_entry */ |
143 | struct ocfs2_xa_loc; | |
144 | struct ocfs2_xa_loc_operations { | |
cf2bc809 JB |
145 | /* |
146 | * Journal functions | |
147 | */ | |
148 | int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc, | |
149 | int type); | |
150 | void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc); | |
151 | ||
11179f2c JB |
152 | /* |
153 | * Return a pointer to the appropriate buffer in loc->xl_storage | |
154 | * at the given offset from loc->xl_header. | |
155 | */ | |
156 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); | |
157 | ||
69a3e539 JB |
158 | /* Can we reuse the existing entry for the new value? */ |
159 | int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc, | |
160 | struct ocfs2_xattr_info *xi); | |
161 | ||
162 | /* How much space is needed for the new value? */ | |
163 | int (*xlo_check_space)(struct ocfs2_xa_loc *loc, | |
164 | struct ocfs2_xattr_info *xi); | |
165 | ||
166 | /* | |
167 | * Return the offset of the first name+value pair. This is | |
168 | * the start of our downward-filling free space. | |
169 | */ | |
170 | int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc); | |
171 | ||
11179f2c JB |
172 | /* |
173 | * Remove the name+value at this location. Do whatever is | |
174 | * appropriate with the remaining name+value pairs. | |
175 | */ | |
176 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); | |
69a3e539 JB |
177 | |
178 | /* Fill xl_entry with a new entry */ | |
179 | void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash); | |
180 | ||
181 | /* Add name+value storage to an entry */ | |
182 | void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size); | |
3fc12afa JB |
183 | |
184 | /* | |
185 | * Initialize the value buf's access and bh fields for this entry. | |
186 | * ocfs2_xa_fill_value_buf() will handle the xv pointer. | |
187 | */ | |
188 | void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc, | |
189 | struct ocfs2_xattr_value_buf *vb); | |
11179f2c JB |
190 | }; |
191 | ||
192 | /* | |
193 | * Describes an xattr entry location. This is a memory structure | |
194 | * tracking the on-disk structure. | |
195 | */ | |
196 | struct ocfs2_xa_loc { | |
cf2bc809 JB |
197 | /* This xattr belongs to this inode */ |
198 | struct inode *xl_inode; | |
199 | ||
11179f2c JB |
200 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ |
201 | struct ocfs2_xattr_header *xl_header; | |
202 | ||
203 | /* Bytes from xl_header to the end of the storage */ | |
204 | int xl_size; | |
205 | ||
206 | /* | |
207 | * The ocfs2_xattr_entry this location describes. If this is | |
208 | * NULL, this location describes the on-disk structure where it | |
209 | * would have been. | |
210 | */ | |
211 | struct ocfs2_xattr_entry *xl_entry; | |
212 | ||
213 | /* | |
214 | * Internal housekeeping | |
215 | */ | |
216 | ||
217 | /* Buffer(s) containing this entry */ | |
218 | void *xl_storage; | |
219 | ||
220 | /* Operations on the storage backing this location */ | |
221 | const struct ocfs2_xa_loc_operations *xl_ops; | |
222 | }; | |
223 | ||
199799a3 JB |
224 | /* |
225 | * Convenience functions to calculate how much space is needed for a | |
226 | * given name+value pair | |
227 | */ | |
228 | static int namevalue_size(int name_len, uint64_t value_len) | |
229 | { | |
230 | if (value_len > OCFS2_XATTR_INLINE_SIZE) | |
231 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
232 | else | |
233 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
234 | } | |
235 | ||
236 | static int namevalue_size_xi(struct ocfs2_xattr_info *xi) | |
237 | { | |
238 | return namevalue_size(xi->xi_name_len, xi->xi_value_len); | |
239 | } | |
240 | ||
241 | static int namevalue_size_xe(struct ocfs2_xattr_entry *xe) | |
242 | { | |
243 | u64 value_len = le64_to_cpu(xe->xe_value_size); | |
244 | ||
245 | BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) && | |
246 | ocfs2_xattr_is_local(xe)); | |
247 | return namevalue_size(xe->xe_name_len, value_len); | |
248 | } | |
249 | ||
250 | ||
fd68a894 | 251 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
252 | struct ocfs2_xattr_header *xh, |
253 | int index, | |
254 | int *block_off, | |
255 | int *new_offset); | |
256 | ||
54f443f4 JB |
257 | static int ocfs2_xattr_block_find(struct inode *inode, |
258 | int name_index, | |
259 | const char *name, | |
260 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
261 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
262 | struct buffer_head *root_bh, | |
263 | int name_index, | |
264 | const char *name, | |
265 | struct ocfs2_xattr_search *xs); | |
266 | ||
0c044f0b | 267 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 268 | struct buffer_head *blk_bh, |
0c044f0b TM |
269 | char *buffer, |
270 | size_t buffer_size); | |
271 | ||
01225596 | 272 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
273 | struct ocfs2_xattr_search *xs, |
274 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
275 | |
276 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
277 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
278 | struct ocfs2_xattr_search *xs, |
279 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 280 | |
47bca495 TM |
281 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
282 | struct buffer_head *root_bh, | |
283 | u64 blkno, u32 cpos, u32 len, void *para); | |
284 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
285 | struct buffer_head *root_bh, | |
286 | xattr_tree_rec_func *rec_func, | |
287 | void *para); | |
288 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
289 | struct ocfs2_xattr_bucket *bucket, | |
290 | void *para); | |
291 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
292 | struct buffer_head *root_bh, | |
293 | u64 blkno, | |
294 | u32 cpos, | |
295 | u32 len, | |
296 | void *para); | |
297 | ||
c58b6032 JB |
298 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
299 | u64 src_blk, u64 last_blk, u64 to_blk, | |
300 | unsigned int start_bucket, | |
301 | u32 *first_hash); | |
492a8a33 TM |
302 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
303 | struct ocfs2_dinode *di, | |
304 | struct ocfs2_xattr_info *xi, | |
305 | struct ocfs2_xattr_search *xis, | |
306 | struct ocfs2_xattr_search *xbs, | |
307 | struct ocfs2_refcount_tree **ref_tree, | |
308 | int *meta_need, | |
309 | int *credits); | |
ce9c5a54 TM |
310 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
311 | struct ocfs2_xattr_bucket *bucket, | |
312 | int offset, | |
313 | struct ocfs2_xattr_value_root **xv, | |
314 | struct buffer_head **bh); | |
a3944256 | 315 | |
0030e001 TY |
316 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
317 | { | |
318 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
319 | } | |
320 | ||
321 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
322 | { | |
323 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
324 | } | |
325 | ||
9c7759aa | 326 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 327 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 328 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 329 | |
ba937127 | 330 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 331 | { |
ba937127 JB |
332 | struct ocfs2_xattr_bucket *bucket; |
333 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 334 | |
ba937127 JB |
335 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
336 | ||
337 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
338 | if (bucket) { | |
339 | bucket->bu_inode = inode; | |
340 | bucket->bu_blocks = blks; | |
341 | } | |
342 | ||
343 | return bucket; | |
344 | } | |
345 | ||
346 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
347 | { | |
348 | int i; | |
349 | ||
350 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
351 | brelse(bucket->bu_bhs[i]); |
352 | bucket->bu_bhs[i] = NULL; | |
353 | } | |
354 | } | |
355 | ||
ba937127 JB |
356 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
357 | { | |
358 | if (bucket) { | |
359 | ocfs2_xattr_bucket_relse(bucket); | |
360 | bucket->bu_inode = NULL; | |
361 | kfree(bucket); | |
362 | } | |
363 | } | |
364 | ||
784b816a JB |
365 | /* |
366 | * A bucket that has never been written to disk doesn't need to be | |
367 | * read. We just need the buffer_heads. Don't call this for | |
368 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
369 | * them fully. | |
370 | */ | |
ba937127 | 371 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
9c339255 | 372 | u64 xb_blkno, int new) |
784b816a JB |
373 | { |
374 | int i, rc = 0; | |
784b816a | 375 | |
ba937127 JB |
376 | for (i = 0; i < bucket->bu_blocks; i++) { |
377 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
378 | xb_blkno + i); | |
784b816a | 379 | if (!bucket->bu_bhs[i]) { |
7391a294 | 380 | rc = -ENOMEM; |
784b816a JB |
381 | mlog_errno(rc); |
382 | break; | |
383 | } | |
384 | ||
8cb471e8 | 385 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
9c339255 WW |
386 | bucket->bu_bhs[i])) { |
387 | if (new) | |
388 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), | |
389 | bucket->bu_bhs[i]); | |
390 | else { | |
391 | set_buffer_uptodate(bucket->bu_bhs[i]); | |
392 | ocfs2_set_buffer_uptodate(INODE_CACHE(bucket->bu_inode), | |
393 | bucket->bu_bhs[i]); | |
394 | } | |
395 | } | |
784b816a JB |
396 | } |
397 | ||
398 | if (rc) | |
ba937127 | 399 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
400 | return rc; |
401 | } | |
402 | ||
403 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 404 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
405 | u64 xb_blkno) |
406 | { | |
ba937127 | 407 | int rc; |
784b816a | 408 | |
8cb471e8 | 409 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
410 | bucket->bu_blocks, bucket->bu_bhs, 0, |
411 | NULL); | |
4d0e214e | 412 | if (!rc) { |
c8b9cf9a | 413 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
414 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
415 | bucket->bu_bhs, | |
416 | bucket->bu_blocks, | |
417 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 418 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
419 | if (rc) |
420 | mlog_errno(rc); | |
421 | } | |
422 | ||
784b816a | 423 | if (rc) |
ba937127 | 424 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
425 | return rc; |
426 | } | |
427 | ||
1224be02 | 428 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
429 | struct ocfs2_xattr_bucket *bucket, |
430 | int type) | |
431 | { | |
432 | int i, rc = 0; | |
1224be02 | 433 | |
ba937127 | 434 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
435 | rc = ocfs2_journal_access(handle, |
436 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
437 | bucket->bu_bhs[i], type); |
438 | if (rc) { | |
439 | mlog_errno(rc); | |
440 | break; | |
441 | } | |
442 | } | |
443 | ||
444 | return rc; | |
445 | } | |
446 | ||
447 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
448 | struct ocfs2_xattr_bucket *bucket) |
449 | { | |
ba937127 | 450 | int i; |
1224be02 | 451 | |
c8b9cf9a | 452 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
453 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
454 | bucket->bu_bhs, bucket->bu_blocks, | |
455 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 456 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 457 | |
ba937127 | 458 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
459 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
460 | } | |
461 | ||
ba937127 | 462 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
463 | struct ocfs2_xattr_bucket *src) |
464 | { | |
465 | int i; | |
ba937127 JB |
466 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
467 | ||
468 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
469 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 470 | |
ba937127 | 471 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
472 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
473 | blocksize); | |
474 | } | |
475 | } | |
1224be02 | 476 | |
4ae1d69b JB |
477 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
478 | struct buffer_head *bh) | |
479 | { | |
d6b32bbb | 480 | int rc; |
4ae1d69b JB |
481 | struct ocfs2_xattr_block *xb = |
482 | (struct ocfs2_xattr_block *)bh->b_data; | |
483 | ||
402b4183 | 484 | trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr); |
4ae1d69b | 485 | |
d6b32bbb JB |
486 | BUG_ON(!buffer_uptodate(bh)); |
487 | ||
488 | /* | |
489 | * If the ecc fails, we return the error but otherwise | |
490 | * leave the filesystem running. We know any error is | |
491 | * local to this block. | |
492 | */ | |
493 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
494 | if (rc) | |
495 | return rc; | |
496 | ||
497 | /* | |
498 | * Errors after here are fatal | |
499 | */ | |
500 | ||
4ae1d69b | 501 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
17a5b9ab | 502 | return ocfs2_error(sb, |
7ecef14a JP |
503 | "Extended attribute block #%llu has bad signature %.*s\n", |
504 | (unsigned long long)bh->b_blocknr, 7, | |
505 | xb->xb_signature); | |
4ae1d69b JB |
506 | } |
507 | ||
508 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
17a5b9ab | 509 | return ocfs2_error(sb, |
7ecef14a JP |
510 | "Extended attribute block #%llu has an invalid xb_blkno of %llu\n", |
511 | (unsigned long long)bh->b_blocknr, | |
512 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
4ae1d69b JB |
513 | } |
514 | ||
515 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
17a5b9ab | 516 | return ocfs2_error(sb, |
7ecef14a JP |
517 | "Extended attribute block #%llu has an invalid xb_fs_generation of #%u\n", |
518 | (unsigned long long)bh->b_blocknr, | |
519 | le32_to_cpu(xb->xb_fs_generation)); | |
4ae1d69b JB |
520 | } |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
526 | struct buffer_head **bh) | |
527 | { | |
528 | int rc; | |
529 | struct buffer_head *tmp = *bh; | |
530 | ||
8cb471e8 | 531 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 532 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
533 | |
534 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
535 | if (!rc && !*bh) | |
536 | *bh = tmp; | |
537 | ||
538 | return rc; | |
539 | } | |
540 | ||
936b8834 | 541 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 | 542 | { |
537d81ca | 543 | const struct xattr_handler *handler = NULL; |
cf1d6c76 TY |
544 | |
545 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
546 | handler = ocfs2_xattr_handler_map[name_index]; | |
547 | ||
936b8834 | 548 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
549 | } |
550 | ||
40daa16a | 551 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 552 | const char *name, |
40daa16a | 553 | int name_len) |
cf1d6c76 TY |
554 | { |
555 | /* Get hash value of uuid from super block */ | |
556 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
557 | int i; | |
558 | ||
cf1d6c76 TY |
559 | /* hash extended attribute name */ |
560 | for (i = 0; i < name_len; i++) { | |
561 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
562 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
563 | *name++; | |
564 | } | |
565 | ||
566 | return hash; | |
567 | } | |
568 | ||
534eaddd TY |
569 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
570 | { | |
199799a3 JB |
571 | return namevalue_size(name_len, value_len) + |
572 | sizeof(struct ocfs2_xattr_entry); | |
573 | } | |
534eaddd | 574 | |
199799a3 JB |
575 | static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi) |
576 | { | |
577 | return namevalue_size_xi(xi) + | |
578 | sizeof(struct ocfs2_xattr_entry); | |
579 | } | |
534eaddd | 580 | |
199799a3 JB |
581 | static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe) |
582 | { | |
583 | return namevalue_size_xe(xe) + | |
584 | sizeof(struct ocfs2_xattr_entry); | |
534eaddd TY |
585 | } |
586 | ||
587 | int ocfs2_calc_security_init(struct inode *dir, | |
588 | struct ocfs2_security_xattr_info *si, | |
589 | int *want_clusters, | |
590 | int *xattr_credits, | |
591 | struct ocfs2_alloc_context **xattr_ac) | |
592 | { | |
593 | int ret = 0; | |
594 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
595 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
596 | si->value_len); | |
597 | ||
598 | /* | |
599 | * The max space of security xattr taken inline is | |
600 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
601 | * So reserve one metadata block for it is ok. | |
602 | */ | |
603 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
604 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
605 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
606 | if (ret) { | |
607 | mlog_errno(ret); | |
608 | return ret; | |
609 | } | |
610 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
611 | } | |
612 | ||
613 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
614 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
615 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
616 | si->value_len); | |
617 | ||
618 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
619 | new_clusters); | |
620 | *want_clusters += new_clusters; | |
621 | } | |
534eaddd TY |
622 | return ret; |
623 | } | |
624 | ||
89c38bd0 TY |
625 | int ocfs2_calc_xattr_init(struct inode *dir, |
626 | struct buffer_head *dir_bh, | |
67697cbd | 627 | umode_t mode, |
89c38bd0 TY |
628 | struct ocfs2_security_xattr_info *si, |
629 | int *want_clusters, | |
630 | int *xattr_credits, | |
9b7895ef | 631 | int *want_meta) |
89c38bd0 TY |
632 | { |
633 | int ret = 0; | |
634 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 635 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
636 | |
637 | if (si->enable) | |
638 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
639 | si->value_len); | |
640 | ||
641 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
642 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
643 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
644 | "", NULL, 0); | |
645 | if (acl_len > 0) { | |
646 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
647 | if (S_ISDIR(mode)) | |
648 | a_size <<= 1; | |
649 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
650 | mlog_errno(ret); | |
651 | return ret; | |
652 | } | |
653 | } | |
654 | ||
655 | if (!(s_size + a_size)) | |
656 | return ret; | |
657 | ||
658 | /* | |
659 | * The max space of security xattr taken inline is | |
660 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
661 | * The max space of acl xattr taken inline is | |
662 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
663 | * when blocksize = 512, may reserve one more cluser for | |
664 | * xattr bucket, otherwise reserve one metadata block | |
665 | * for them is ok. | |
6c9fd1dc TY |
666 | * If this is a new directory with inline data, |
667 | * we choose to reserve the entire inline area for | |
668 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
669 | */ |
670 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 671 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 672 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 673 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
674 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
675 | } | |
676 | ||
677 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
678 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
679 | *want_clusters += 1; | |
680 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
681 | } | |
682 | ||
0e445b6f TY |
683 | /* |
684 | * reserve credits and clusters for xattrs which has large value | |
685 | * and have to be set outside | |
686 | */ | |
687 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
688 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
689 | si->value_len); | |
690 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
691 | new_clusters); | |
692 | *want_clusters += new_clusters; | |
693 | } | |
89c38bd0 TY |
694 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
695 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
696 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
697 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
698 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
699 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
700 | new_clusters); | |
701 | *want_clusters += new_clusters; | |
89c38bd0 TY |
702 | } |
703 | ||
704 | return ret; | |
705 | } | |
706 | ||
f56654c4 TM |
707 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
708 | u32 clusters_to_add, | |
19b801f4 | 709 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 710 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 | 711 | { |
a78f9f46 | 712 | int status = 0, credits; |
85db90e7 | 713 | handle_t *handle = ctxt->handle; |
f56654c4 | 714 | enum ocfs2_alloc_restarted why; |
19b801f4 | 715 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 716 | struct ocfs2_extent_tree et; |
f56654c4 | 717 | |
5e404e9e | 718 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 719 | |
a78f9f46 | 720 | while (clusters_to_add) { |
402b4183 TM |
721 | trace_ocfs2_xattr_extend_allocation(clusters_to_add); |
722 | ||
a78f9f46 TM |
723 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
724 | OCFS2_JOURNAL_ACCESS_WRITE); | |
725 | if (status < 0) { | |
726 | mlog_errno(status); | |
727 | break; | |
728 | } | |
f56654c4 | 729 | |
a78f9f46 TM |
730 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
731 | status = ocfs2_add_clusters_in_btree(handle, | |
732 | &et, | |
733 | &logical_start, | |
734 | clusters_to_add, | |
735 | 0, | |
736 | ctxt->data_ac, | |
737 | ctxt->meta_ac, | |
738 | &why); | |
739 | if ((status < 0) && (status != -EAGAIN)) { | |
740 | if (status != -ENOSPC) | |
741 | mlog_errno(status); | |
742 | break; | |
743 | } | |
f56654c4 | 744 | |
a78f9f46 TM |
745 | ocfs2_journal_dirty(handle, vb->vb_bh); |
746 | ||
747 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - | |
748 | prev_clusters; | |
749 | ||
750 | if (why != RESTART_NONE && clusters_to_add) { | |
751 | /* | |
752 | * We can only fail in case the alloc file doesn't give | |
753 | * up enough clusters. | |
754 | */ | |
755 | BUG_ON(why == RESTART_META); | |
756 | ||
a78f9f46 | 757 | credits = ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 758 | &vb->vb_xv->xr_list); |
a78f9f46 TM |
759 | status = ocfs2_extend_trans(handle, credits); |
760 | if (status < 0) { | |
761 | status = -ENOMEM; | |
762 | mlog_errno(status); | |
763 | break; | |
764 | } | |
765 | } | |
766 | } | |
f56654c4 TM |
767 | |
768 | return status; | |
769 | } | |
770 | ||
771 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 772 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 773 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 774 | unsigned int ext_flags, |
78f30c31 | 775 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
776 | { |
777 | int ret; | |
778 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 779 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
780 | struct ocfs2_extent_tree et; |
781 | ||
5e404e9e | 782 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 783 | |
0cf2f763 | 784 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 785 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
786 | if (ret) { |
787 | mlog_errno(ret); | |
85db90e7 | 788 | goto out; |
f56654c4 TM |
789 | } |
790 | ||
dbdcf6a4 | 791 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 792 | &ctxt->dealloc); |
f56654c4 TM |
793 | if (ret) { |
794 | mlog_errno(ret); | |
85db90e7 | 795 | goto out; |
f56654c4 TM |
796 | } |
797 | ||
d72cc72d | 798 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
ec20cec7 | 799 | ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 | 800 | |
492a8a33 TM |
801 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
802 | ret = ocfs2_decrease_refcount(inode, handle, | |
803 | ocfs2_blocks_to_clusters(inode->i_sb, | |
804 | phys_blkno), | |
805 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
806 | else | |
807 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
808 | phys_blkno, len); | |
f56654c4 TM |
809 | if (ret) |
810 | mlog_errno(ret); | |
811 | ||
f56654c4 | 812 | out: |
f56654c4 TM |
813 | return ret; |
814 | } | |
815 | ||
816 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
817 | u32 old_clusters, | |
818 | u32 new_clusters, | |
19b801f4 | 819 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 820 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
821 | { |
822 | int ret = 0; | |
492a8a33 | 823 | unsigned int ext_flags; |
f56654c4 TM |
824 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
825 | u64 block; | |
f56654c4 TM |
826 | |
827 | if (old_clusters <= new_clusters) | |
828 | return 0; | |
829 | ||
830 | cpos = new_clusters; | |
831 | trunc_len = old_clusters - new_clusters; | |
832 | while (trunc_len) { | |
833 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 834 | &alloc_size, |
492a8a33 | 835 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
836 | if (ret) { |
837 | mlog_errno(ret); | |
838 | goto out; | |
839 | } | |
840 | ||
841 | if (alloc_size > trunc_len) | |
842 | alloc_size = trunc_len; | |
843 | ||
19b801f4 | 844 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 845 | phys_cpos, alloc_size, |
492a8a33 | 846 | ext_flags, ctxt); |
f56654c4 TM |
847 | if (ret) { |
848 | mlog_errno(ret); | |
849 | goto out; | |
850 | } | |
851 | ||
852 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
853 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
854 | block, alloc_size); | |
f56654c4 TM |
855 | cpos += alloc_size; |
856 | trunc_len -= alloc_size; | |
857 | } | |
858 | ||
859 | out: | |
f56654c4 TM |
860 | return ret; |
861 | } | |
862 | ||
863 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 864 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
865 | int len, |
866 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
867 | { |
868 | int ret; | |
869 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 870 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
871 | |
872 | if (new_clusters == old_clusters) | |
873 | return 0; | |
874 | ||
875 | if (new_clusters > old_clusters) | |
876 | ret = ocfs2_xattr_extend_allocation(inode, | |
877 | new_clusters - old_clusters, | |
b3e5d379 | 878 | vb, ctxt); |
f56654c4 TM |
879 | else |
880 | ret = ocfs2_xattr_shrink_size(inode, | |
881 | old_clusters, new_clusters, | |
b3e5d379 | 882 | vb, ctxt); |
f56654c4 TM |
883 | |
884 | return ret; | |
885 | } | |
cf1d6c76 | 886 | |
936b8834 TM |
887 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
888 | size_t *result, const char *prefix, | |
889 | const char *name, int name_len) | |
890 | { | |
891 | char *p = buffer + *result; | |
892 | int prefix_len = strlen(prefix); | |
893 | int total_len = prefix_len + name_len + 1; | |
894 | ||
895 | *result += total_len; | |
896 | ||
897 | /* we are just looking for how big our buffer needs to be */ | |
898 | if (!size) | |
899 | return 0; | |
900 | ||
901 | if (*result > size) | |
902 | return -ERANGE; | |
903 | ||
904 | memcpy(p, prefix, prefix_len); | |
905 | memcpy(p + prefix_len, name, name_len); | |
906 | p[prefix_len + name_len] = '\0'; | |
907 | ||
908 | return 0; | |
909 | } | |
910 | ||
cf1d6c76 TY |
911 | static int ocfs2_xattr_list_entries(struct inode *inode, |
912 | struct ocfs2_xattr_header *header, | |
913 | char *buffer, size_t buffer_size) | |
914 | { | |
936b8834 TM |
915 | size_t result = 0; |
916 | int i, type, ret; | |
917 | const char *prefix, *name; | |
cf1d6c76 TY |
918 | |
919 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
920 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
921 | type = ocfs2_xattr_get_type(entry); |
922 | prefix = ocfs2_xattr_prefix(type); | |
923 | ||
924 | if (prefix) { | |
925 | name = (const char *)header + | |
926 | le16_to_cpu(entry->xe_name_offset); | |
927 | ||
928 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
929 | &result, prefix, name, | |
930 | entry->xe_name_len); | |
931 | if (ret) | |
932 | return ret; | |
cf1d6c76 TY |
933 | } |
934 | } | |
935 | ||
936b8834 | 936 | return result; |
cf1d6c76 TY |
937 | } |
938 | ||
8b2c0dba TM |
939 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
940 | struct ocfs2_dinode *di) | |
941 | { | |
942 | struct ocfs2_xattr_header *xh; | |
943 | int i; | |
944 | ||
945 | xh = (struct ocfs2_xattr_header *) | |
946 | ((void *)di + inode->i_sb->s_blocksize - | |
947 | le16_to_cpu(di->i_xattr_inline_size)); | |
948 | ||
949 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
950 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
951 | return 1; | |
952 | ||
953 | return 0; | |
954 | } | |
955 | ||
cf1d6c76 TY |
956 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
957 | struct ocfs2_dinode *di, | |
958 | char *buffer, | |
959 | size_t buffer_size) | |
960 | { | |
961 | struct ocfs2_xattr_header *header = NULL; | |
962 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
963 | int ret = 0; | |
964 | ||
965 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
966 | return ret; | |
967 | ||
968 | header = (struct ocfs2_xattr_header *) | |
969 | ((void *)di + inode->i_sb->s_blocksize - | |
970 | le16_to_cpu(di->i_xattr_inline_size)); | |
971 | ||
972 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
973 | ||
974 | return ret; | |
975 | } | |
976 | ||
977 | static int ocfs2_xattr_block_list(struct inode *inode, | |
978 | struct ocfs2_dinode *di, | |
979 | char *buffer, | |
980 | size_t buffer_size) | |
981 | { | |
982 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 983 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
984 | int ret = 0; |
985 | ||
986 | if (!di->i_xattr_loc) | |
987 | return ret; | |
988 | ||
4ae1d69b JB |
989 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
990 | &blk_bh); | |
cf1d6c76 TY |
991 | if (ret < 0) { |
992 | mlog_errno(ret); | |
993 | return ret; | |
994 | } | |
cf1d6c76 | 995 | |
0c044f0b | 996 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
997 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
998 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
999 | ret = ocfs2_xattr_list_entries(inode, header, | |
1000 | buffer, buffer_size); | |
47bca495 TM |
1001 | } else |
1002 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 1003 | buffer, buffer_size); |
4ae1d69b | 1004 | |
cf1d6c76 TY |
1005 | brelse(blk_bh); |
1006 | ||
1007 | return ret; | |
1008 | } | |
1009 | ||
1010 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
1011 | char *buffer, | |
1012 | size_t size) | |
1013 | { | |
1014 | int ret = 0, i_ret = 0, b_ret = 0; | |
1015 | struct buffer_head *di_bh = NULL; | |
1016 | struct ocfs2_dinode *di = NULL; | |
2b0143b5 | 1017 | struct ocfs2_inode_info *oi = OCFS2_I(d_inode(dentry)); |
cf1d6c76 | 1018 | |
8154da3d TY |
1019 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
1020 | return -EOPNOTSUPP; | |
1021 | ||
cf1d6c76 TY |
1022 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1023 | return ret; | |
1024 | ||
2b0143b5 | 1025 | ret = ocfs2_inode_lock(d_inode(dentry), &di_bh, 0); |
cf1d6c76 TY |
1026 | if (ret < 0) { |
1027 | mlog_errno(ret); | |
1028 | return ret; | |
1029 | } | |
1030 | ||
1031 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1032 | ||
1033 | down_read(&oi->ip_xattr_sem); | |
2b0143b5 | 1034 | i_ret = ocfs2_xattr_ibody_list(d_inode(dentry), di, buffer, size); |
cf1d6c76 TY |
1035 | if (i_ret < 0) |
1036 | b_ret = 0; | |
1037 | else { | |
1038 | if (buffer) { | |
1039 | buffer += i_ret; | |
1040 | size -= i_ret; | |
1041 | } | |
2b0143b5 | 1042 | b_ret = ocfs2_xattr_block_list(d_inode(dentry), di, |
cf1d6c76 TY |
1043 | buffer, size); |
1044 | if (b_ret < 0) | |
1045 | i_ret = 0; | |
1046 | } | |
1047 | up_read(&oi->ip_xattr_sem); | |
2b0143b5 | 1048 | ocfs2_inode_unlock(d_inode(dentry), 0); |
cf1d6c76 TY |
1049 | |
1050 | brelse(di_bh); | |
1051 | ||
1052 | return i_ret + b_ret; | |
1053 | } | |
1054 | ||
1055 | static int ocfs2_xattr_find_entry(int name_index, | |
1056 | const char *name, | |
1057 | struct ocfs2_xattr_search *xs) | |
1058 | { | |
1059 | struct ocfs2_xattr_entry *entry; | |
1060 | size_t name_len; | |
1061 | int i, cmp = 1; | |
1062 | ||
1063 | if (name == NULL) | |
1064 | return -EINVAL; | |
1065 | ||
1066 | name_len = strlen(name); | |
1067 | entry = xs->here; | |
1068 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1069 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
1070 | if (!cmp) | |
1071 | cmp = name_len - entry->xe_name_len; | |
1072 | if (!cmp) | |
1073 | cmp = memcmp(name, (xs->base + | |
1074 | le16_to_cpu(entry->xe_name_offset)), | |
1075 | name_len); | |
1076 | if (cmp == 0) | |
1077 | break; | |
1078 | entry += 1; | |
1079 | } | |
1080 | xs->here = entry; | |
1081 | ||
1082 | return cmp ? -ENODATA : 0; | |
1083 | } | |
1084 | ||
1085 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 1086 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
1087 | void *buffer, |
1088 | size_t len) | |
1089 | { | |
1090 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1091 | u64 blkno; | |
1092 | int i, ret = 0; | |
1093 | size_t cplen, blocksize; | |
1094 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1095 | struct ocfs2_extent_list *el; |
1096 | ||
cf1d6c76 TY |
1097 | el = &xv->xr_list; |
1098 | clusters = le32_to_cpu(xv->xr_clusters); | |
1099 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1100 | blocksize = inode->i_sb->s_blocksize; | |
1101 | ||
1102 | cpos = 0; | |
1103 | while (cpos < clusters) { | |
1104 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1105 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1106 | if (ret) { |
1107 | mlog_errno(ret); | |
1108 | goto out; | |
1109 | } | |
1110 | ||
1111 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1112 | /* Copy ocfs2_xattr_value */ | |
1113 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1114 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1115 | &bh, NULL); | |
cf1d6c76 TY |
1116 | if (ret) { |
1117 | mlog_errno(ret); | |
1118 | goto out; | |
1119 | } | |
1120 | ||
1121 | cplen = len >= blocksize ? blocksize : len; | |
1122 | memcpy(buffer, bh->b_data, cplen); | |
1123 | len -= cplen; | |
1124 | buffer += cplen; | |
1125 | ||
1126 | brelse(bh); | |
1127 | bh = NULL; | |
1128 | if (len == 0) | |
1129 | break; | |
1130 | } | |
1131 | cpos += num_clusters; | |
1132 | } | |
1133 | out: | |
1134 | return ret; | |
1135 | } | |
1136 | ||
1137 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1138 | int name_index, | |
1139 | const char *name, | |
1140 | void *buffer, | |
1141 | size_t buffer_size, | |
1142 | struct ocfs2_xattr_search *xs) | |
1143 | { | |
1144 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1145 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1146 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1147 | size_t size; |
1148 | int ret = 0; | |
1149 | ||
1150 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1151 | return -ENODATA; | |
1152 | ||
1153 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1154 | xs->header = (struct ocfs2_xattr_header *) | |
1155 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1156 | xs->base = (void *)xs->header; | |
1157 | xs->here = xs->header->xh_entries; | |
1158 | ||
1159 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1160 | if (ret) | |
1161 | return ret; | |
1162 | size = le64_to_cpu(xs->here->xe_value_size); | |
1163 | if (buffer) { | |
1164 | if (size > buffer_size) | |
1165 | return -ERANGE; | |
1166 | if (ocfs2_xattr_is_local(xs->here)) { | |
1167 | memcpy(buffer, (void *)xs->base + | |
1168 | le16_to_cpu(xs->here->xe_name_offset) + | |
1169 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1170 | } else { | |
589dc260 TM |
1171 | xv = (struct ocfs2_xattr_value_root *) |
1172 | (xs->base + le16_to_cpu( | |
1173 | xs->here->xe_name_offset) + | |
1174 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1175 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1176 | buffer, size); |
1177 | if (ret < 0) { | |
1178 | mlog_errno(ret); | |
1179 | return ret; | |
1180 | } | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | return size; | |
1185 | } | |
1186 | ||
1187 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1188 | int name_index, | |
1189 | const char *name, | |
1190 | void *buffer, | |
1191 | size_t buffer_size, | |
1192 | struct ocfs2_xattr_search *xs) | |
1193 | { | |
cf1d6c76 | 1194 | struct ocfs2_xattr_block *xb; |
589dc260 | 1195 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1196 | size_t size; |
44d8e4e1 SM |
1197 | int ret = -ENODATA, name_offset, name_len, i; |
1198 | int uninitialized_var(block_off); | |
cf1d6c76 | 1199 | |
ba937127 JB |
1200 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1201 | if (!xs->bucket) { | |
1202 | ret = -ENOMEM; | |
1203 | mlog_errno(ret); | |
1204 | goto cleanup; | |
1205 | } | |
589dc260 | 1206 | |
54f443f4 JB |
1207 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1208 | if (ret) { | |
cf1d6c76 | 1209 | mlog_errno(ret); |
cf1d6c76 TY |
1210 | goto cleanup; |
1211 | } | |
1212 | ||
6c1e183e TY |
1213 | if (xs->not_found) { |
1214 | ret = -ENODATA; | |
1215 | goto cleanup; | |
1216 | } | |
1217 | ||
54f443f4 | 1218 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1219 | size = le64_to_cpu(xs->here->xe_value_size); |
1220 | if (buffer) { | |
1221 | ret = -ERANGE; | |
1222 | if (size > buffer_size) | |
1223 | goto cleanup; | |
589dc260 TM |
1224 | |
1225 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1226 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1227 | i = xs->here - xs->header->xh_entries; | |
1228 | ||
1229 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1230 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1231 | bucket_xh(xs->bucket), |
589dc260 TM |
1232 | i, |
1233 | &block_off, | |
1234 | &name_offset); | |
023d4ea3 JQ |
1235 | if (ret) { |
1236 | mlog_errno(ret); | |
1237 | goto cleanup; | |
1238 | } | |
ba937127 | 1239 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1240 | } |
cf1d6c76 TY |
1241 | if (ocfs2_xattr_is_local(xs->here)) { |
1242 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1243 | name_offset + name_len, size); |
cf1d6c76 | 1244 | } else { |
589dc260 TM |
1245 | xv = (struct ocfs2_xattr_value_root *) |
1246 | (xs->base + name_offset + name_len); | |
1247 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1248 | buffer, size); |
1249 | if (ret < 0) { | |
1250 | mlog_errno(ret); | |
1251 | goto cleanup; | |
1252 | } | |
1253 | } | |
1254 | } | |
1255 | ret = size; | |
1256 | cleanup: | |
ba937127 | 1257 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1258 | |
54f443f4 JB |
1259 | brelse(xs->xattr_bh); |
1260 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1261 | return ret; |
1262 | } | |
1263 | ||
4e3e9d02 TY |
1264 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1265 | struct buffer_head *di_bh, | |
0030e001 TY |
1266 | int name_index, |
1267 | const char *name, | |
1268 | void *buffer, | |
1269 | size_t buffer_size) | |
cf1d6c76 TY |
1270 | { |
1271 | int ret; | |
1272 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1273 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1274 | struct ocfs2_xattr_search xis = { | |
1275 | .not_found = -ENODATA, | |
1276 | }; | |
1277 | struct ocfs2_xattr_search xbs = { | |
1278 | .not_found = -ENODATA, | |
1279 | }; | |
1280 | ||
8154da3d TY |
1281 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1282 | return -EOPNOTSUPP; | |
1283 | ||
cf1d6c76 | 1284 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2b693005 | 1285 | return -ENODATA; |
cf1d6c76 | 1286 | |
cf1d6c76 TY |
1287 | xis.inode_bh = xbs.inode_bh = di_bh; |
1288 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1289 | ||
cf1d6c76 TY |
1290 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, |
1291 | buffer_size, &xis); | |
6c1e183e | 1292 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1293 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1294 | buffer_size, &xbs); | |
4e3e9d02 TY |
1295 | |
1296 | return ret; | |
1297 | } | |
1298 | ||
1299 | /* ocfs2_xattr_get() | |
1300 | * | |
1301 | * Copy an extended attribute into the buffer provided. | |
1302 | * Buffer is NULL to compute the size of buffer required. | |
1303 | */ | |
1304 | static int ocfs2_xattr_get(struct inode *inode, | |
1305 | int name_index, | |
1306 | const char *name, | |
1307 | void *buffer, | |
1308 | size_t buffer_size) | |
1309 | { | |
1310 | int ret; | |
1311 | struct buffer_head *di_bh = NULL; | |
1312 | ||
1313 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1314 | if (ret < 0) { | |
1315 | mlog_errno(ret); | |
1316 | return ret; | |
1317 | } | |
5e64b0d9 | 1318 | down_read(&OCFS2_I(inode)->ip_xattr_sem); |
4e3e9d02 TY |
1319 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, |
1320 | name, buffer, buffer_size); | |
5e64b0d9 | 1321 | up_read(&OCFS2_I(inode)->ip_xattr_sem); |
4e3e9d02 | 1322 | |
cf1d6c76 TY |
1323 | ocfs2_inode_unlock(inode, 0); |
1324 | ||
1325 | brelse(di_bh); | |
1326 | ||
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1331 | handle_t *handle, |
492a8a33 | 1332 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1333 | const void *value, |
1334 | int value_len) | |
1335 | { | |
71d548a6 | 1336 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1337 | u16 blocksize = inode->i_sb->s_blocksize; |
1338 | u32 p_cluster, num_clusters; | |
1339 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1340 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1341 | u64 blkno; | |
1342 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1343 | unsigned int ext_flags; |
1344 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1345 | |
1346 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1347 | ||
cf1d6c76 TY |
1348 | while (cpos < clusters) { |
1349 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1350 | &num_clusters, &xv->xr_list, |
492a8a33 | 1351 | &ext_flags); |
cf1d6c76 TY |
1352 | if (ret) { |
1353 | mlog_errno(ret); | |
85db90e7 | 1354 | goto out; |
cf1d6c76 TY |
1355 | } |
1356 | ||
492a8a33 TM |
1357 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1358 | ||
cf1d6c76 TY |
1359 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1360 | ||
1361 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1362 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1363 | &bh, NULL); | |
cf1d6c76 TY |
1364 | if (ret) { |
1365 | mlog_errno(ret); | |
85db90e7 | 1366 | goto out; |
cf1d6c76 TY |
1367 | } |
1368 | ||
1369 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1370 | INODE_CACHE(inode), |
cf1d6c76 TY |
1371 | bh, |
1372 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1373 | if (ret < 0) { | |
1374 | mlog_errno(ret); | |
85db90e7 | 1375 | goto out; |
cf1d6c76 TY |
1376 | } |
1377 | ||
1378 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1379 | memcpy(bh->b_data, value, cp_len); | |
1380 | value_len -= cp_len; | |
1381 | value += cp_len; | |
1382 | if (cp_len < blocksize) | |
1383 | memset(bh->b_data + cp_len, 0, | |
1384 | blocksize - cp_len); | |
1385 | ||
ec20cec7 | 1386 | ocfs2_journal_dirty(handle, bh); |
cf1d6c76 TY |
1387 | brelse(bh); |
1388 | bh = NULL; | |
1389 | ||
1390 | /* | |
1391 | * XXX: do we need to empty all the following | |
1392 | * blocks in this cluster? | |
1393 | */ | |
1394 | if (!value_len) | |
1395 | break; | |
1396 | } | |
1397 | cpos += num_clusters; | |
1398 | } | |
cf1d6c76 TY |
1399 | out: |
1400 | brelse(bh); | |
1401 | ||
1402 | return ret; | |
1403 | } | |
1404 | ||
69a3e539 JB |
1405 | static int ocfs2_xa_check_space_helper(int needed_space, int free_start, |
1406 | int num_entries) | |
1407 | { | |
1408 | int free_space; | |
1409 | ||
1410 | if (!needed_space) | |
1411 | return 0; | |
1412 | ||
1413 | free_space = free_start - | |
1414 | sizeof(struct ocfs2_xattr_header) - | |
1415 | (num_entries * sizeof(struct ocfs2_xattr_entry)) - | |
1416 | OCFS2_XATTR_HEADER_GAP; | |
1417 | if (free_space < 0) | |
1418 | return -EIO; | |
1419 | if (free_space < needed_space) | |
1420 | return -ENOSPC; | |
1421 | ||
1422 | return 0; | |
1423 | } | |
1424 | ||
cf2bc809 JB |
1425 | static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc, |
1426 | int type) | |
1427 | { | |
1428 | return loc->xl_ops->xlo_journal_access(handle, loc, type); | |
1429 | } | |
1430 | ||
1431 | static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc) | |
1432 | { | |
1433 | loc->xl_ops->xlo_journal_dirty(handle, loc); | |
1434 | } | |
1435 | ||
69a3e539 JB |
1436 | /* Give a pointer into the storage for the given offset */ |
1437 | static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset) | |
1438 | { | |
1439 | BUG_ON(offset >= loc->xl_size); | |
1440 | return loc->xl_ops->xlo_offset_pointer(loc, offset); | |
1441 | } | |
1442 | ||
11179f2c JB |
1443 | /* |
1444 | * Wipe the name+value pair and allow the storage to reclaim it. This | |
1445 | * must be followed by either removal of the entry or a call to | |
1446 | * ocfs2_xa_add_namevalue(). | |
1447 | */ | |
1448 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1449 | { | |
1450 | loc->xl_ops->xlo_wipe_namevalue(loc); | |
1451 | } | |
1452 | ||
69a3e539 JB |
1453 | /* |
1454 | * Find lowest offset to a name+value pair. This is the start of our | |
1455 | * downward-growing free space. | |
1456 | */ | |
1457 | static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc) | |
1458 | { | |
1459 | return loc->xl_ops->xlo_get_free_start(loc); | |
1460 | } | |
1461 | ||
1462 | /* Can we reuse loc->xl_entry for xi? */ | |
1463 | static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc, | |
1464 | struct ocfs2_xattr_info *xi) | |
1465 | { | |
1466 | return loc->xl_ops->xlo_can_reuse(loc, xi); | |
1467 | } | |
1468 | ||
1469 | /* How much free space is needed to set the new value */ | |
1470 | static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc, | |
1471 | struct ocfs2_xattr_info *xi) | |
1472 | { | |
1473 | return loc->xl_ops->xlo_check_space(loc, xi); | |
1474 | } | |
1475 | ||
1476 | static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) | |
1477 | { | |
1478 | loc->xl_ops->xlo_add_entry(loc, name_hash); | |
1479 | loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash); | |
1480 | /* | |
1481 | * We can't leave the new entry's xe_name_offset at zero or | |
1482 | * add_namevalue() will go nuts. We set it to the size of our | |
1483 | * storage so that it can never be less than any other entry. | |
1484 | */ | |
1485 | loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size); | |
1486 | } | |
1487 | ||
1488 | static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc, | |
1489 | struct ocfs2_xattr_info *xi) | |
1490 | { | |
1491 | int size = namevalue_size_xi(xi); | |
1492 | int nameval_offset; | |
1493 | char *nameval_buf; | |
1494 | ||
1495 | loc->xl_ops->xlo_add_namevalue(loc, size); | |
1496 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
1497 | loc->xl_entry->xe_name_len = xi->xi_name_len; | |
1498 | ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index); | |
1499 | ocfs2_xattr_set_local(loc->xl_entry, | |
1500 | xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE); | |
1501 | ||
1502 | nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1503 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); | |
1504 | memset(nameval_buf, 0, size); | |
1505 | memcpy(nameval_buf, xi->xi_name, xi->xi_name_len); | |
1506 | } | |
1507 | ||
3fc12afa JB |
1508 | static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc, |
1509 | struct ocfs2_xattr_value_buf *vb) | |
1510 | { | |
1511 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1512 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
1513 | ||
1514 | /* Value bufs are for value trees */ | |
73857ee0 | 1515 | BUG_ON(ocfs2_xattr_is_local(loc->xl_entry)); |
3fc12afa JB |
1516 | BUG_ON(namevalue_size_xe(loc->xl_entry) != |
1517 | (name_size + OCFS2_XATTR_ROOT_SIZE)); | |
1518 | ||
1519 | loc->xl_ops->xlo_fill_value_buf(loc, vb); | |
1520 | vb->vb_xv = | |
1521 | (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc, | |
1522 | nameval_offset + | |
1523 | name_size); | |
1524 | } | |
1525 | ||
cf2bc809 JB |
1526 | static int ocfs2_xa_block_journal_access(handle_t *handle, |
1527 | struct ocfs2_xa_loc *loc, int type) | |
1528 | { | |
1529 | struct buffer_head *bh = loc->xl_storage; | |
1530 | ocfs2_journal_access_func access; | |
1531 | ||
1532 | if (loc->xl_size == (bh->b_size - | |
1533 | offsetof(struct ocfs2_xattr_block, | |
1534 | xb_attrs.xb_header))) | |
1535 | access = ocfs2_journal_access_xb; | |
1536 | else | |
1537 | access = ocfs2_journal_access_di; | |
1538 | return access(handle, INODE_CACHE(loc->xl_inode), bh, type); | |
1539 | } | |
1540 | ||
1541 | static void ocfs2_xa_block_journal_dirty(handle_t *handle, | |
1542 | struct ocfs2_xa_loc *loc) | |
1543 | { | |
1544 | struct buffer_head *bh = loc->xl_storage; | |
1545 | ||
1546 | ocfs2_journal_dirty(handle, bh); | |
1547 | } | |
1548 | ||
11179f2c JB |
1549 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, |
1550 | int offset) | |
1551 | { | |
11179f2c JB |
1552 | return (char *)loc->xl_header + offset; |
1553 | } | |
1554 | ||
69a3e539 JB |
1555 | static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc, |
1556 | struct ocfs2_xattr_info *xi) | |
1557 | { | |
1558 | /* | |
1559 | * Block storage is strict. If the sizes aren't exact, we will | |
1560 | * remove the old one and reinsert the new. | |
1561 | */ | |
1562 | return namevalue_size_xe(loc->xl_entry) == | |
1563 | namevalue_size_xi(xi); | |
1564 | } | |
1565 | ||
1566 | static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc) | |
1567 | { | |
1568 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1569 | int i, count = le16_to_cpu(xh->xh_count); | |
1570 | int offset, free_start = loc->xl_size; | |
1571 | ||
1572 | for (i = 0; i < count; i++) { | |
1573 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1574 | if (offset < free_start) | |
1575 | free_start = offset; | |
1576 | } | |
1577 | ||
1578 | return free_start; | |
1579 | } | |
1580 | ||
1581 | static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc, | |
1582 | struct ocfs2_xattr_info *xi) | |
1583 | { | |
1584 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1585 | int free_start = ocfs2_xa_get_free_start(loc); | |
1586 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1587 | ||
1588 | /* | |
1589 | * Block storage will reclaim the original entry before inserting | |
1590 | * the new value, so we only need the difference. If the new | |
1591 | * entry is smaller than the old one, we don't need anything. | |
1592 | */ | |
1593 | if (loc->xl_entry) { | |
1594 | /* Don't need space if we're reusing! */ | |
1595 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1596 | needed_space = 0; | |
1597 | else | |
1598 | needed_space -= ocfs2_xe_entry_usage(loc->xl_entry); | |
1599 | } | |
1600 | if (needed_space < 0) | |
1601 | needed_space = 0; | |
1602 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1603 | } | |
1604 | ||
11179f2c JB |
1605 | /* |
1606 | * Block storage for xattrs keeps the name+value pairs compacted. When | |
1607 | * we remove one, we have to shift any that preceded it towards the end. | |
1608 | */ | |
1609 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1610 | { | |
1611 | int i, offset; | |
1612 | int namevalue_offset, first_namevalue_offset, namevalue_size; | |
1613 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1614 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
11179f2c JB |
1615 | int count = le16_to_cpu(xh->xh_count); |
1616 | ||
1617 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); | |
199799a3 | 1618 | namevalue_size = namevalue_size_xe(entry); |
69a3e539 | 1619 | first_namevalue_offset = ocfs2_xa_get_free_start(loc); |
11179f2c JB |
1620 | |
1621 | /* Shift the name+value pairs */ | |
1622 | memmove((char *)xh + first_namevalue_offset + namevalue_size, | |
1623 | (char *)xh + first_namevalue_offset, | |
1624 | namevalue_offset - first_namevalue_offset); | |
1625 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); | |
1626 | ||
1627 | /* Now tell xh->xh_entries about it */ | |
1628 | for (i = 0; i < count; i++) { | |
1629 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
dfe4d3d6 | 1630 | if (offset <= namevalue_offset) |
11179f2c JB |
1631 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, |
1632 | namevalue_size); | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * Note that we don't update xh_free_start or xh_name_value_len | |
1637 | * because they're not used in block-stored xattrs. | |
1638 | */ | |
1639 | } | |
1640 | ||
69a3e539 JB |
1641 | static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1642 | { | |
1643 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1644 | loc->xl_entry = &(loc->xl_header->xh_entries[count]); | |
1645 | le16_add_cpu(&loc->xl_header->xh_count, 1); | |
1646 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1647 | } | |
1648 | ||
1649 | static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1650 | { | |
1651 | int free_start = ocfs2_xa_get_free_start(loc); | |
1652 | ||
1653 | loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size); | |
1654 | } | |
1655 | ||
3fc12afa JB |
1656 | static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc, |
1657 | struct ocfs2_xattr_value_buf *vb) | |
1658 | { | |
1659 | struct buffer_head *bh = loc->xl_storage; | |
1660 | ||
1661 | if (loc->xl_size == (bh->b_size - | |
1662 | offsetof(struct ocfs2_xattr_block, | |
1663 | xb_attrs.xb_header))) | |
1664 | vb->vb_access = ocfs2_journal_access_xb; | |
1665 | else | |
1666 | vb->vb_access = ocfs2_journal_access_di; | |
1667 | vb->vb_bh = bh; | |
1668 | } | |
1669 | ||
11179f2c JB |
1670 | /* |
1671 | * Operations for xattrs stored in blocks. This includes inline inode | |
1672 | * storage and unindexed ocfs2_xattr_blocks. | |
1673 | */ | |
1674 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { | |
cf2bc809 JB |
1675 | .xlo_journal_access = ocfs2_xa_block_journal_access, |
1676 | .xlo_journal_dirty = ocfs2_xa_block_journal_dirty, | |
11179f2c | 1677 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, |
69a3e539 JB |
1678 | .xlo_check_space = ocfs2_xa_block_check_space, |
1679 | .xlo_can_reuse = ocfs2_xa_block_can_reuse, | |
1680 | .xlo_get_free_start = ocfs2_xa_block_get_free_start, | |
11179f2c | 1681 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, |
69a3e539 JB |
1682 | .xlo_add_entry = ocfs2_xa_block_add_entry, |
1683 | .xlo_add_namevalue = ocfs2_xa_block_add_namevalue, | |
3fc12afa | 1684 | .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf, |
11179f2c JB |
1685 | }; |
1686 | ||
cf2bc809 JB |
1687 | static int ocfs2_xa_bucket_journal_access(handle_t *handle, |
1688 | struct ocfs2_xa_loc *loc, int type) | |
1689 | { | |
1690 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1691 | ||
1692 | return ocfs2_xattr_bucket_journal_access(handle, bucket, type); | |
1693 | } | |
1694 | ||
1695 | static void ocfs2_xa_bucket_journal_dirty(handle_t *handle, | |
1696 | struct ocfs2_xa_loc *loc) | |
1697 | { | |
1698 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1699 | ||
1700 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
1701 | } | |
1702 | ||
11179f2c JB |
1703 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, |
1704 | int offset) | |
1705 | { | |
1706 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1707 | int block, block_offset; | |
1708 | ||
11179f2c | 1709 | /* The header is at the front of the bucket */ |
cf2bc809 JB |
1710 | block = offset >> loc->xl_inode->i_sb->s_blocksize_bits; |
1711 | block_offset = offset % loc->xl_inode->i_sb->s_blocksize; | |
11179f2c JB |
1712 | |
1713 | return bucket_block(bucket, block) + block_offset; | |
1714 | } | |
1715 | ||
69a3e539 JB |
1716 | static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc, |
1717 | struct ocfs2_xattr_info *xi) | |
1718 | { | |
1719 | return namevalue_size_xe(loc->xl_entry) >= | |
1720 | namevalue_size_xi(xi); | |
1721 | } | |
1722 | ||
1723 | static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc) | |
1724 | { | |
1725 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1726 | return le16_to_cpu(bucket_xh(bucket)->xh_free_start); | |
1727 | } | |
1728 | ||
1729 | static int ocfs2_bucket_align_free_start(struct super_block *sb, | |
1730 | int free_start, int size) | |
1731 | { | |
1732 | /* | |
1733 | * We need to make sure that the name+value pair fits within | |
1734 | * one block. | |
1735 | */ | |
1736 | if (((free_start - size) >> sb->s_blocksize_bits) != | |
1737 | ((free_start - 1) >> sb->s_blocksize_bits)) | |
1738 | free_start -= free_start % sb->s_blocksize; | |
1739 | ||
1740 | return free_start; | |
1741 | } | |
1742 | ||
1743 | static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc, | |
1744 | struct ocfs2_xattr_info *xi) | |
1745 | { | |
1746 | int rc; | |
1747 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1748 | int free_start = ocfs2_xa_get_free_start(loc); | |
1749 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1750 | int size = namevalue_size_xi(xi); | |
cf2bc809 | 1751 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1752 | |
1753 | /* | |
1754 | * Bucket storage does not reclaim name+value pairs it cannot | |
1755 | * reuse. They live as holes until the bucket fills, and then | |
1756 | * the bucket is defragmented. However, the bucket can reclaim | |
1757 | * the ocfs2_xattr_entry. | |
1758 | */ | |
1759 | if (loc->xl_entry) { | |
1760 | /* Don't need space if we're reusing! */ | |
1761 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1762 | needed_space = 0; | |
1763 | else | |
1764 | needed_space -= sizeof(struct ocfs2_xattr_entry); | |
1765 | } | |
1766 | BUG_ON(needed_space < 0); | |
1767 | ||
1768 | if (free_start < size) { | |
1769 | if (needed_space) | |
1770 | return -ENOSPC; | |
1771 | } else { | |
1772 | /* | |
1773 | * First we check if it would fit in the first place. | |
1774 | * Below, we align the free start to a block. This may | |
1775 | * slide us below the minimum gap. By checking unaligned | |
1776 | * first, we avoid that error. | |
1777 | */ | |
1778 | rc = ocfs2_xa_check_space_helper(needed_space, free_start, | |
1779 | count); | |
1780 | if (rc) | |
1781 | return rc; | |
1782 | free_start = ocfs2_bucket_align_free_start(sb, free_start, | |
1783 | size); | |
1784 | } | |
1785 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1786 | } | |
1787 | ||
11179f2c JB |
1788 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) |
1789 | { | |
199799a3 JB |
1790 | le16_add_cpu(&loc->xl_header->xh_name_value_len, |
1791 | -namevalue_size_xe(loc->xl_entry)); | |
11179f2c JB |
1792 | } |
1793 | ||
69a3e539 JB |
1794 | static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1795 | { | |
1796 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1797 | int count = le16_to_cpu(xh->xh_count); | |
1798 | int low = 0, high = count - 1, tmp; | |
1799 | struct ocfs2_xattr_entry *tmp_xe; | |
1800 | ||
1801 | /* | |
1802 | * We keep buckets sorted by name_hash, so we need to find | |
1803 | * our insert place. | |
1804 | */ | |
1805 | while (low <= high && count) { | |
1806 | tmp = (low + high) / 2; | |
1807 | tmp_xe = &xh->xh_entries[tmp]; | |
1808 | ||
1809 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
1810 | low = tmp + 1; | |
1811 | else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash)) | |
1812 | high = tmp - 1; | |
1813 | else { | |
1814 | low = tmp; | |
1815 | break; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | if (low != count) | |
1820 | memmove(&xh->xh_entries[low + 1], | |
1821 | &xh->xh_entries[low], | |
1822 | ((count - low) * sizeof(struct ocfs2_xattr_entry))); | |
1823 | ||
1824 | le16_add_cpu(&xh->xh_count, 1); | |
1825 | loc->xl_entry = &xh->xh_entries[low]; | |
1826 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1827 | } | |
1828 | ||
1829 | static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1830 | { | |
1831 | int free_start = ocfs2_xa_get_free_start(loc); | |
1832 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
cf2bc809 | 1833 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1834 | int nameval_offset; |
1835 | ||
1836 | free_start = ocfs2_bucket_align_free_start(sb, free_start, size); | |
1837 | nameval_offset = free_start - size; | |
1838 | loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset); | |
1839 | xh->xh_free_start = cpu_to_le16(nameval_offset); | |
1840 | le16_add_cpu(&xh->xh_name_value_len, size); | |
1841 | ||
1842 | } | |
1843 | ||
3fc12afa JB |
1844 | static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc, |
1845 | struct ocfs2_xattr_value_buf *vb) | |
1846 | { | |
1847 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
cf2bc809 | 1848 | struct super_block *sb = loc->xl_inode->i_sb; |
3fc12afa JB |
1849 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
1850 | int size = namevalue_size_xe(loc->xl_entry); | |
1851 | int block_offset = nameval_offset >> sb->s_blocksize_bits; | |
1852 | ||
1853 | /* Values are not allowed to straddle block boundaries */ | |
1854 | BUG_ON(block_offset != | |
1855 | ((nameval_offset + size - 1) >> sb->s_blocksize_bits)); | |
1856 | /* We expect the bucket to be filled in */ | |
1857 | BUG_ON(!bucket->bu_bhs[block_offset]); | |
1858 | ||
1859 | vb->vb_access = ocfs2_journal_access; | |
1860 | vb->vb_bh = bucket->bu_bhs[block_offset]; | |
1861 | } | |
1862 | ||
11179f2c JB |
1863 | /* Operations for xattrs stored in buckets. */ |
1864 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { | |
cf2bc809 JB |
1865 | .xlo_journal_access = ocfs2_xa_bucket_journal_access, |
1866 | .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty, | |
11179f2c | 1867 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, |
69a3e539 JB |
1868 | .xlo_check_space = ocfs2_xa_bucket_check_space, |
1869 | .xlo_can_reuse = ocfs2_xa_bucket_can_reuse, | |
1870 | .xlo_get_free_start = ocfs2_xa_bucket_get_free_start, | |
11179f2c | 1871 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, |
69a3e539 JB |
1872 | .xlo_add_entry = ocfs2_xa_bucket_add_entry, |
1873 | .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue, | |
3fc12afa | 1874 | .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf, |
11179f2c JB |
1875 | }; |
1876 | ||
399ff3a7 JB |
1877 | static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc) |
1878 | { | |
1879 | struct ocfs2_xattr_value_buf vb; | |
1880 | ||
1881 | if (ocfs2_xattr_is_local(loc->xl_entry)) | |
1882 | return 0; | |
1883 | ||
1884 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1885 | return le32_to_cpu(vb.vb_xv->xr_clusters); | |
1886 | } | |
1887 | ||
73857ee0 JB |
1888 | static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes, |
1889 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1890 | { | |
1891 | int trunc_rc, access_rc; | |
1892 | struct ocfs2_xattr_value_buf vb; | |
1893 | ||
1894 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1895 | trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes, | |
1896 | ctxt); | |
1897 | ||
1898 | /* | |
1899 | * The caller of ocfs2_xa_value_truncate() has already called | |
1900 | * ocfs2_xa_journal_access on the loc. However, The truncate code | |
1901 | * calls ocfs2_extend_trans(). This may commit the previous | |
1902 | * transaction and open a new one. If this is a bucket, truncate | |
1903 | * could leave only vb->vb_bh set up for journaling. Meanwhile, | |
1904 | * the caller is expecting to dirty the entire bucket. So we must | |
1905 | * reset the journal work. We do this even if truncate has failed, | |
1906 | * as it could have failed after committing the extend. | |
1907 | */ | |
1908 | access_rc = ocfs2_xa_journal_access(ctxt->handle, loc, | |
1909 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1910 | ||
1911 | /* Errors in truncate take precedence */ | |
1912 | return trunc_rc ? trunc_rc : access_rc; | |
1913 | } | |
1914 | ||
11179f2c JB |
1915 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) |
1916 | { | |
bde1e540 JB |
1917 | int index, count; |
1918 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1919 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1920 | ||
11179f2c | 1921 | ocfs2_xa_wipe_namevalue(loc); |
bde1e540 JB |
1922 | loc->xl_entry = NULL; |
1923 | ||
1924 | le16_add_cpu(&xh->xh_count, -1); | |
1925 | count = le16_to_cpu(xh->xh_count); | |
1926 | ||
1927 | /* | |
1928 | * Only zero out the entry if there are more remaining. This is | |
1929 | * important for an empty bucket, as it keeps track of the | |
1930 | * bucket's hash value. It doesn't hurt empty block storage. | |
1931 | */ | |
1932 | if (count) { | |
1933 | index = ((char *)entry - (char *)&xh->xh_entries) / | |
1934 | sizeof(struct ocfs2_xattr_entry); | |
1935 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], | |
1936 | (count - index) * sizeof(struct ocfs2_xattr_entry)); | |
1937 | memset(&xh->xh_entries[count], 0, | |
1938 | sizeof(struct ocfs2_xattr_entry)); | |
1939 | } | |
11179f2c JB |
1940 | } |
1941 | ||
399ff3a7 JB |
1942 | /* |
1943 | * If we have a problem adjusting the size of an external value during | |
1944 | * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr | |
1945 | * in an intermediate state. For example, the value may be partially | |
1946 | * truncated. | |
1947 | * | |
1948 | * If the value tree hasn't changed, the extend/truncate went nowhere. | |
1949 | * We have nothing to do. The caller can treat it as a straight error. | |
1950 | * | |
1951 | * If the value tree got partially truncated, we now have a corrupted | |
1952 | * extended attribute. We're going to wipe its entry and leak the | |
1953 | * clusters. Better to leak some storage than leave a corrupt entry. | |
1954 | * | |
1955 | * If the value tree grew, it obviously didn't grow enough for the | |
1956 | * new entry. We're not going to try and reclaim those clusters either. | |
1957 | * If there was already an external value there (orig_clusters != 0), | |
1958 | * the new clusters are attached safely and we can just leave the old | |
1959 | * value in place. If there was no external value there, we remove | |
1960 | * the entry. | |
1961 | * | |
1962 | * This way, the xattr block we store in the journal will be consistent. | |
1963 | * If the size change broke because of the journal, no changes will hit | |
1964 | * disk anyway. | |
1965 | */ | |
1966 | static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc, | |
1967 | const char *what, | |
1968 | unsigned int orig_clusters) | |
1969 | { | |
1970 | unsigned int new_clusters = ocfs2_xa_value_clusters(loc); | |
1971 | char *nameval_buf = ocfs2_xa_offset_pointer(loc, | |
1972 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
1973 | ||
1974 | if (new_clusters < orig_clusters) { | |
1975 | mlog(ML_ERROR, | |
1976 | "Partial truncate while %s xattr %.*s. Leaking " | |
1977 | "%u clusters and removing the entry\n", | |
1978 | what, loc->xl_entry->xe_name_len, nameval_buf, | |
1979 | orig_clusters - new_clusters); | |
1980 | ocfs2_xa_remove_entry(loc); | |
1981 | } else if (!orig_clusters) { | |
1982 | mlog(ML_ERROR, | |
1983 | "Unable to allocate an external value for xattr " | |
1984 | "%.*s safely. Leaking %u clusters and removing the " | |
1985 | "entry\n", | |
1986 | loc->xl_entry->xe_name_len, nameval_buf, | |
1987 | new_clusters - orig_clusters); | |
1988 | ocfs2_xa_remove_entry(loc); | |
1989 | } else if (new_clusters > orig_clusters) | |
1990 | mlog(ML_ERROR, | |
1991 | "Unable to grow xattr %.*s safely. %u new clusters " | |
1992 | "have been added, but the value will not be " | |
1993 | "modified\n", | |
1994 | loc->xl_entry->xe_name_len, nameval_buf, | |
1995 | new_clusters - orig_clusters); | |
1996 | } | |
1997 | ||
73857ee0 JB |
1998 | static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc, |
1999 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2000 | { | |
2001 | int rc = 0; | |
399ff3a7 | 2002 | unsigned int orig_clusters; |
73857ee0 JB |
2003 | |
2004 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { | |
399ff3a7 | 2005 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2006 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2007 | if (rc) { | |
2008 | mlog_errno(rc); | |
399ff3a7 JB |
2009 | /* |
2010 | * Since this is remove, we can return 0 if | |
2011 | * ocfs2_xa_cleanup_value_truncate() is going to | |
2012 | * wipe the entry anyway. So we check the | |
2013 | * cluster count as well. | |
2014 | */ | |
2015 | if (orig_clusters != ocfs2_xa_value_clusters(loc)) | |
2016 | rc = 0; | |
2017 | ocfs2_xa_cleanup_value_truncate(loc, "removing", | |
2018 | orig_clusters); | |
2019 | if (rc) | |
2020 | goto out; | |
73857ee0 JB |
2021 | } |
2022 | } | |
2023 | ||
2024 | ocfs2_xa_remove_entry(loc); | |
2025 | ||
2026 | out: | |
2027 | return rc; | |
2028 | } | |
2029 | ||
2030 | static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc) | |
2031 | { | |
2032 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
2033 | char *nameval_buf; | |
2034 | ||
2035 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2036 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2037 | memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE); | |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * Take an existing entry and make it ready for the new value. This | |
2042 | * won't allocate space, but it may free space. It should be ready for | |
2043 | * ocfs2_xa_prepare_entry() to finish the work. | |
2044 | */ | |
2045 | static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc, | |
2046 | struct ocfs2_xattr_info *xi, | |
2047 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2048 | { | |
2049 | int rc = 0; | |
2050 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
399ff3a7 | 2051 | unsigned int orig_clusters; |
73857ee0 JB |
2052 | char *nameval_buf; |
2053 | int xe_local = ocfs2_xattr_is_local(loc->xl_entry); | |
2054 | int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE; | |
2055 | ||
2056 | BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) != | |
2057 | name_size); | |
2058 | ||
2059 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2060 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2061 | if (xe_local) { | |
2062 | memset(nameval_buf + name_size, 0, | |
2063 | namevalue_size_xe(loc->xl_entry) - name_size); | |
2064 | if (!xi_local) | |
2065 | ocfs2_xa_install_value_root(loc); | |
2066 | } else { | |
399ff3a7 | 2067 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2068 | if (xi_local) { |
2069 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); | |
399ff3a7 | 2070 | if (rc < 0) |
73857ee0 | 2071 | mlog_errno(rc); |
399ff3a7 JB |
2072 | else |
2073 | memset(nameval_buf + name_size, 0, | |
2074 | namevalue_size_xe(loc->xl_entry) - | |
2075 | name_size); | |
73857ee0 JB |
2076 | } else if (le64_to_cpu(loc->xl_entry->xe_value_size) > |
2077 | xi->xi_value_len) { | |
2078 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, | |
2079 | ctxt); | |
399ff3a7 | 2080 | if (rc < 0) |
73857ee0 | 2081 | mlog_errno(rc); |
399ff3a7 JB |
2082 | } |
2083 | ||
2084 | if (rc) { | |
2085 | ocfs2_xa_cleanup_value_truncate(loc, "reusing", | |
2086 | orig_clusters); | |
2087 | goto out; | |
73857ee0 JB |
2088 | } |
2089 | } | |
2090 | ||
2091 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
2092 | ocfs2_xattr_set_local(loc->xl_entry, xi_local); | |
2093 | ||
2094 | out: | |
2095 | return rc; | |
2096 | } | |
2097 | ||
69a3e539 JB |
2098 | /* |
2099 | * Prepares loc->xl_entry to receive the new xattr. This includes | |
2100 | * properly setting up the name+value pair region. If loc->xl_entry | |
2101 | * already exists, it will take care of modifying it appropriately. | |
69a3e539 JB |
2102 | * |
2103 | * Note that this modifies the data. You did journal_access already, | |
2104 | * right? | |
2105 | */ | |
2106 | static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc, | |
2107 | struct ocfs2_xattr_info *xi, | |
73857ee0 JB |
2108 | u32 name_hash, |
2109 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 JB |
2110 | { |
2111 | int rc = 0; | |
399ff3a7 JB |
2112 | unsigned int orig_clusters; |
2113 | __le64 orig_value_size = 0; | |
69a3e539 | 2114 | |
69a3e539 JB |
2115 | rc = ocfs2_xa_check_space(loc, xi); |
2116 | if (rc) | |
2117 | goto out; | |
2118 | ||
2119 | if (loc->xl_entry) { | |
2120 | if (ocfs2_xa_can_reuse_entry(loc, xi)) { | |
399ff3a7 | 2121 | orig_value_size = loc->xl_entry->xe_value_size; |
73857ee0 JB |
2122 | rc = ocfs2_xa_reuse_entry(loc, xi, ctxt); |
2123 | if (rc) | |
2124 | goto out; | |
2125 | goto alloc_value; | |
69a3e539 JB |
2126 | } |
2127 | ||
73857ee0 | 2128 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
399ff3a7 | 2129 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2130 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2131 | if (rc) { | |
2132 | mlog_errno(rc); | |
399ff3a7 JB |
2133 | ocfs2_xa_cleanup_value_truncate(loc, |
2134 | "overwriting", | |
2135 | orig_clusters); | |
73857ee0 JB |
2136 | goto out; |
2137 | } | |
2138 | } | |
69a3e539 JB |
2139 | ocfs2_xa_wipe_namevalue(loc); |
2140 | } else | |
2141 | ocfs2_xa_add_entry(loc, name_hash); | |
2142 | ||
2143 | /* | |
2144 | * If we get here, we have a blank entry. Fill it. We grow our | |
2145 | * name+value pair back from the end. | |
2146 | */ | |
2147 | ocfs2_xa_add_namevalue(loc, xi); | |
73857ee0 JB |
2148 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
2149 | ocfs2_xa_install_value_root(loc); | |
2150 | ||
2151 | alloc_value: | |
2152 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { | |
399ff3a7 | 2153 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 | 2154 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt); |
399ff3a7 | 2155 | if (rc < 0) { |
5f5261ac | 2156 | ctxt->set_abort = 1; |
399ff3a7 JB |
2157 | ocfs2_xa_cleanup_value_truncate(loc, "growing", |
2158 | orig_clusters); | |
d5a7df06 TM |
2159 | /* |
2160 | * If we were growing an existing value, | |
2161 | * ocfs2_xa_cleanup_value_truncate() won't remove | |
2162 | * the entry. We need to restore the original value | |
2163 | * size. | |
2164 | */ | |
2165 | if (loc->xl_entry) { | |
2166 | BUG_ON(!orig_value_size); | |
2167 | loc->xl_entry->xe_value_size = orig_value_size; | |
2168 | } | |
73857ee0 | 2169 | mlog_errno(rc); |
399ff3a7 | 2170 | } |
73857ee0 | 2171 | } |
69a3e539 JB |
2172 | |
2173 | out: | |
2174 | return rc; | |
2175 | } | |
2176 | ||
2177 | /* | |
73857ee0 JB |
2178 | * Store the value portion of the name+value pair. This will skip |
2179 | * values that are stored externally. Their tree roots were set up | |
2180 | * by ocfs2_xa_prepare_entry(). | |
69a3e539 | 2181 | */ |
73857ee0 JB |
2182 | static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc, |
2183 | struct ocfs2_xattr_info *xi, | |
2184 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 | 2185 | { |
73857ee0 | 2186 | int rc = 0; |
69a3e539 JB |
2187 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
2188 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
69a3e539 | 2189 | char *nameval_buf; |
73857ee0 | 2190 | struct ocfs2_xattr_value_buf vb; |
69a3e539 | 2191 | |
69a3e539 | 2192 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
73857ee0 JB |
2193 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
2194 | ocfs2_xa_fill_value_buf(loc, &vb); | |
2195 | rc = __ocfs2_xattr_set_value_outside(loc->xl_inode, | |
2196 | ctxt->handle, &vb, | |
2197 | xi->xi_value, | |
2198 | xi->xi_value_len); | |
2199 | } else | |
2200 | memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len); | |
2201 | ||
73857ee0 | 2202 | return rc; |
69a3e539 JB |
2203 | } |
2204 | ||
bca5e9bd JB |
2205 | static int ocfs2_xa_set(struct ocfs2_xa_loc *loc, |
2206 | struct ocfs2_xattr_info *xi, | |
2207 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2208 | { | |
2209 | int ret; | |
2210 | u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name, | |
2211 | xi->xi_name_len); | |
2212 | ||
2213 | ret = ocfs2_xa_journal_access(ctxt->handle, loc, | |
2214 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2215 | if (ret) { | |
2216 | mlog_errno(ret); | |
2217 | goto out; | |
2218 | } | |
2219 | ||
399ff3a7 JB |
2220 | /* |
2221 | * From here on out, everything is going to modify the buffer a | |
2222 | * little. Errors are going to leave the xattr header in a | |
2223 | * sane state. Thus, even with errors we dirty the sucker. | |
2224 | */ | |
2225 | ||
bca5e9bd JB |
2226 | /* Don't worry, we are never called with !xi_value and !xl_entry */ |
2227 | if (!xi->xi_value) { | |
2228 | ret = ocfs2_xa_remove(loc, ctxt); | |
399ff3a7 | 2229 | goto out_dirty; |
bca5e9bd JB |
2230 | } |
2231 | ||
2232 | ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt); | |
2233 | if (ret) { | |
2234 | if (ret != -ENOSPC) | |
2235 | mlog_errno(ret); | |
399ff3a7 | 2236 | goto out_dirty; |
bca5e9bd JB |
2237 | } |
2238 | ||
2239 | ret = ocfs2_xa_store_value(loc, xi, ctxt); | |
399ff3a7 | 2240 | if (ret) |
bca5e9bd | 2241 | mlog_errno(ret); |
bca5e9bd | 2242 | |
399ff3a7 | 2243 | out_dirty: |
bca5e9bd JB |
2244 | ocfs2_xa_journal_dirty(ctxt->handle, loc); |
2245 | ||
2246 | out: | |
2247 | return ret; | |
2248 | } | |
2249 | ||
11179f2c JB |
2250 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, |
2251 | struct inode *inode, | |
2252 | struct buffer_head *bh, | |
2253 | struct ocfs2_xattr_entry *entry) | |
2254 | { | |
2255 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; | |
2256 | ||
139fface JB |
2257 | BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL)); |
2258 | ||
cf2bc809 | 2259 | loc->xl_inode = inode; |
11179f2c JB |
2260 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2261 | loc->xl_storage = bh; | |
2262 | loc->xl_entry = entry; | |
139fface | 2263 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); |
11179f2c JB |
2264 | loc->xl_header = |
2265 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - | |
2266 | loc->xl_size); | |
2267 | } | |
2268 | ||
2269 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, | |
cf2bc809 | 2270 | struct inode *inode, |
11179f2c JB |
2271 | struct buffer_head *bh, |
2272 | struct ocfs2_xattr_entry *entry) | |
2273 | { | |
2274 | struct ocfs2_xattr_block *xb = | |
2275 | (struct ocfs2_xattr_block *)bh->b_data; | |
2276 | ||
2277 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); | |
2278 | ||
cf2bc809 | 2279 | loc->xl_inode = inode; |
11179f2c JB |
2280 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2281 | loc->xl_storage = bh; | |
2282 | loc->xl_header = &(xb->xb_attrs.xb_header); | |
2283 | loc->xl_entry = entry; | |
2284 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, | |
2285 | xb_attrs.xb_header); | |
2286 | } | |
2287 | ||
2288 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, | |
2289 | struct ocfs2_xattr_bucket *bucket, | |
2290 | struct ocfs2_xattr_entry *entry) | |
2291 | { | |
cf2bc809 | 2292 | loc->xl_inode = bucket->bu_inode; |
11179f2c JB |
2293 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; |
2294 | loc->xl_storage = bucket; | |
2295 | loc->xl_header = bucket_xh(bucket); | |
2296 | loc->xl_entry = entry; | |
2297 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; | |
2298 | } | |
2299 | ||
ce9c5a54 TM |
2300 | /* |
2301 | * In xattr remove, if it is stored outside and refcounted, we may have | |
2302 | * the chance to split the refcount tree. So need the allocators. | |
2303 | */ | |
2304 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
2305 | struct ocfs2_xattr_value_root *xv, | |
2306 | struct ocfs2_caching_info *ref_ci, | |
2307 | struct buffer_head *ref_root_bh, | |
2308 | struct ocfs2_alloc_context **meta_ac, | |
2309 | int *ref_credits) | |
2310 | { | |
2311 | int ret, meta_add = 0; | |
2312 | u32 p_cluster, num_clusters; | |
2313 | unsigned int ext_flags; | |
2314 | ||
2315 | *ref_credits = 0; | |
2316 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
2317 | &num_clusters, | |
2318 | &xv->xr_list, | |
2319 | &ext_flags); | |
2320 | if (ret) { | |
2321 | mlog_errno(ret); | |
2322 | goto out; | |
2323 | } | |
2324 | ||
2325 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
2326 | goto out; | |
2327 | ||
2328 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
2329 | ref_root_bh, xv, | |
2330 | &meta_add, ref_credits); | |
2331 | if (ret) { | |
2332 | mlog_errno(ret); | |
2333 | goto out; | |
2334 | } | |
2335 | ||
2336 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
2337 | meta_add, meta_ac); | |
2338 | if (ret) | |
2339 | mlog_errno(ret); | |
2340 | ||
2341 | out: | |
2342 | return ret; | |
2343 | } | |
2344 | ||
cf1d6c76 | 2345 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 2346 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
2347 | struct ocfs2_xattr_header *header, |
2348 | struct ocfs2_caching_info *ref_ci, | |
2349 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 2350 | { |
ce9c5a54 | 2351 | int ret = 0, i, ref_credits; |
78f30c31 TM |
2352 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2353 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 2354 | void *val; |
78f30c31 TM |
2355 | |
2356 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
2357 | |
2358 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
2359 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
2360 | ||
ce9c5a54 TM |
2361 | if (ocfs2_xattr_is_local(entry)) |
2362 | continue; | |
cf1d6c76 | 2363 | |
ce9c5a54 TM |
2364 | val = (void *)header + |
2365 | le16_to_cpu(entry->xe_name_offset); | |
2366 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
2367 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
2368 | ||
2369 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
2370 | ref_ci, ref_root_bh, | |
2371 | &ctxt.meta_ac, | |
2372 | &ref_credits); | |
2373 | ||
2374 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
2375 | ocfs2_remove_extent_credits(osb->sb)); | |
2376 | if (IS_ERR(ctxt.handle)) { | |
2377 | ret = PTR_ERR(ctxt.handle); | |
2378 | mlog_errno(ret); | |
2379 | break; | |
2380 | } | |
2381 | ||
2382 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
ce9c5a54 TM |
2383 | |
2384 | ocfs2_commit_trans(osb, ctxt.handle); | |
2385 | if (ctxt.meta_ac) { | |
2386 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2387 | ctxt.meta_ac = NULL; | |
cf1d6c76 | 2388 | } |
b8a0ae57 WW |
2389 | |
2390 | if (ret < 0) { | |
2391 | mlog_errno(ret); | |
2392 | break; | |
2393 | } | |
2394 | ||
cf1d6c76 TY |
2395 | } |
2396 | ||
ce9c5a54 TM |
2397 | if (ctxt.meta_ac) |
2398 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
2399 | ocfs2_schedule_truncate_log_flush(osb, 1); |
2400 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2401 | return ret; |
2402 | } | |
2403 | ||
2404 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
2405 | struct buffer_head *di_bh, |
2406 | struct ocfs2_caching_info *ref_ci, | |
2407 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2408 | { |
2409 | ||
2410 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2411 | struct ocfs2_xattr_header *header; | |
2412 | int ret; | |
4311901d JB |
2413 | struct ocfs2_xattr_value_buf vb = { |
2414 | .vb_bh = di_bh, | |
2415 | .vb_access = ocfs2_journal_access_di, | |
2416 | }; | |
cf1d6c76 TY |
2417 | |
2418 | header = (struct ocfs2_xattr_header *) | |
2419 | ((void *)di + inode->i_sb->s_blocksize - | |
2420 | le16_to_cpu(di->i_xattr_inline_size)); | |
2421 | ||
ce9c5a54 TM |
2422 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2423 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2424 | |
2425 | return ret; | |
2426 | } | |
2427 | ||
ce9c5a54 TM |
2428 | struct ocfs2_rm_xattr_bucket_para { |
2429 | struct ocfs2_caching_info *ref_ci; | |
2430 | struct buffer_head *ref_root_bh; | |
2431 | }; | |
2432 | ||
cf1d6c76 | 2433 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
2434 | struct buffer_head *blk_bh, |
2435 | struct ocfs2_caching_info *ref_ci, | |
2436 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2437 | { |
2438 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 2439 | int ret = 0; |
4311901d JB |
2440 | struct ocfs2_xattr_value_buf vb = { |
2441 | .vb_bh = blk_bh, | |
2442 | .vb_access = ocfs2_journal_access_xb, | |
2443 | }; | |
ce9c5a54 TM |
2444 | struct ocfs2_rm_xattr_bucket_para args = { |
2445 | .ref_ci = ref_ci, | |
2446 | .ref_root_bh = ref_root_bh, | |
2447 | }; | |
cf1d6c76 TY |
2448 | |
2449 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
2450 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
2451 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
2452 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2453 | ref_ci, ref_root_bh); | |
a3944256 | 2454 | } else |
47bca495 TM |
2455 | ret = ocfs2_iterate_xattr_index_block(inode, |
2456 | blk_bh, | |
2457 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 2458 | &args); |
cf1d6c76 TY |
2459 | |
2460 | return ret; | |
2461 | } | |
2462 | ||
08413899 | 2463 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
2464 | u64 block, |
2465 | struct ocfs2_caching_info *ref_ci, | |
2466 | struct buffer_head *ref_root_bh) | |
08413899 TM |
2467 | { |
2468 | struct inode *xb_alloc_inode; | |
2469 | struct buffer_head *xb_alloc_bh = NULL; | |
2470 | struct buffer_head *blk_bh = NULL; | |
2471 | struct ocfs2_xattr_block *xb; | |
2472 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2473 | handle_t *handle; | |
2474 | int ret = 0; | |
2475 | u64 blk, bg_blkno; | |
2476 | u16 bit; | |
2477 | ||
4ae1d69b | 2478 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
2479 | if (ret < 0) { |
2480 | mlog_errno(ret); | |
2481 | goto out; | |
2482 | } | |
2483 | ||
ce9c5a54 | 2484 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
2485 | if (ret < 0) { |
2486 | mlog_errno(ret); | |
2487 | goto out; | |
2488 | } | |
2489 | ||
4ae1d69b | 2490 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
2491 | blk = le64_to_cpu(xb->xb_blkno); |
2492 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
74380c47 TM |
2493 | if (xb->xb_suballoc_loc) |
2494 | bg_blkno = le64_to_cpu(xb->xb_suballoc_loc); | |
2495 | else | |
2496 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
08413899 TM |
2497 | |
2498 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2499 | EXTENT_ALLOC_SYSTEM_INODE, | |
2500 | le16_to_cpu(xb->xb_suballoc_slot)); | |
2501 | if (!xb_alloc_inode) { | |
2502 | ret = -ENOMEM; | |
2503 | mlog_errno(ret); | |
2504 | goto out; | |
2505 | } | |
2506 | mutex_lock(&xb_alloc_inode->i_mutex); | |
2507 | ||
2508 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
2509 | if (ret < 0) { | |
2510 | mlog_errno(ret); | |
2511 | goto out_mutex; | |
2512 | } | |
2513 | ||
2514 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
2515 | if (IS_ERR(handle)) { | |
2516 | ret = PTR_ERR(handle); | |
2517 | mlog_errno(ret); | |
2518 | goto out_unlock; | |
2519 | } | |
2520 | ||
2521 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
2522 | bit, bg_blkno, 1); | |
2523 | if (ret < 0) | |
2524 | mlog_errno(ret); | |
2525 | ||
2526 | ocfs2_commit_trans(osb, handle); | |
2527 | out_unlock: | |
2528 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
2529 | brelse(xb_alloc_bh); | |
2530 | out_mutex: | |
2531 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
2532 | iput(xb_alloc_inode); | |
2533 | out: | |
2534 | brelse(blk_bh); | |
2535 | return ret; | |
2536 | } | |
2537 | ||
cf1d6c76 TY |
2538 | /* |
2539 | * ocfs2_xattr_remove() | |
2540 | * | |
2541 | * Free extended attribute resources associated with this inode. | |
2542 | */ | |
2543 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2544 | { | |
cf1d6c76 TY |
2545 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2546 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2547 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2548 | struct buffer_head *ref_root_bh = NULL; | |
2549 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2550 | handle_t *handle; |
2551 | int ret; | |
2552 | ||
8154da3d TY |
2553 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2554 | return 0; | |
2555 | ||
cf1d6c76 TY |
2556 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2557 | return 0; | |
2558 | ||
ce9c5a54 TM |
2559 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
2560 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), | |
2561 | le64_to_cpu(di->i_refcount_loc), | |
2562 | 1, &ref_tree, &ref_root_bh); | |
2563 | if (ret) { | |
2564 | mlog_errno(ret); | |
2565 | goto out; | |
2566 | } | |
2567 | ref_ci = &ref_tree->rf_ci; | |
2568 | ||
2569 | } | |
2570 | ||
cf1d6c76 | 2571 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2572 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2573 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2574 | if (ret < 0) { |
2575 | mlog_errno(ret); | |
2576 | goto out; | |
2577 | } | |
2578 | } | |
cf1d6c76 | 2579 | |
08413899 TM |
2580 | if (di->i_xattr_loc) { |
2581 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2582 | le64_to_cpu(di->i_xattr_loc), |
2583 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2584 | if (ret < 0) { |
2585 | mlog_errno(ret); | |
2586 | goto out; | |
2587 | } | |
2588 | } | |
2589 | ||
2590 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2591 | OCFS2_INODE_UPDATE_CREDITS); | |
2592 | if (IS_ERR(handle)) { | |
2593 | ret = PTR_ERR(handle); | |
2594 | mlog_errno(ret); | |
2595 | goto out; | |
2596 | } | |
0cf2f763 | 2597 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2598 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2599 | if (ret) { |
2600 | mlog_errno(ret); | |
2601 | goto out_commit; | |
2602 | } | |
2603 | ||
08413899 | 2604 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2605 | |
2606 | spin_lock(&oi->ip_lock); | |
2607 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2608 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2609 | spin_unlock(&oi->ip_lock); | |
6fdb702d | 2610 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
cf1d6c76 | 2611 | |
ec20cec7 | 2612 | ocfs2_journal_dirty(handle, di_bh); |
cf1d6c76 TY |
2613 | out_commit: |
2614 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2615 | out: | |
ce9c5a54 TM |
2616 | if (ref_tree) |
2617 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2618 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2619 | return ret; |
2620 | } | |
2621 | ||
2622 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2623 | struct ocfs2_dinode *di) | |
2624 | { | |
2625 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2626 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2627 | int free; | |
2628 | ||
2629 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2630 | return 0; | |
2631 | ||
2632 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2633 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2634 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2635 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2636 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2637 | le64_to_cpu(di->i_size); | |
2638 | } else { | |
2639 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2640 | free = (le16_to_cpu(el->l_count) - | |
2641 | le16_to_cpu(el->l_next_free_rec)) * | |
2642 | sizeof(struct ocfs2_extent_rec); | |
2643 | } | |
2644 | if (free >= xattrsize) | |
2645 | return 1; | |
2646 | ||
2647 | return 0; | |
2648 | } | |
2649 | ||
2650 | /* | |
2651 | * ocfs2_xattr_ibody_find() | |
2652 | * | |
2653 | * Find extended attribute in inode block and | |
2654 | * fill search info into struct ocfs2_xattr_search. | |
2655 | */ | |
2656 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2657 | int name_index, | |
2658 | const char *name, | |
2659 | struct ocfs2_xattr_search *xs) | |
2660 | { | |
2661 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2662 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2663 | int ret; | |
2664 | int has_space = 0; | |
2665 | ||
2666 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2667 | return 0; | |
2668 | ||
2669 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2670 | down_read(&oi->ip_alloc_sem); | |
2671 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2672 | up_read(&oi->ip_alloc_sem); | |
2673 | if (!has_space) | |
2674 | return 0; | |
2675 | } | |
2676 | ||
2677 | xs->xattr_bh = xs->inode_bh; | |
2678 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2679 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2680 | xs->header = (struct ocfs2_xattr_header *) | |
2681 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2682 | else | |
2683 | xs->header = (struct ocfs2_xattr_header *) | |
2684 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2685 | xs->base = (void *)xs->header; | |
2686 | xs->here = xs->header->xh_entries; | |
2687 | ||
2688 | /* Find the named attribute. */ | |
2689 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2690 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2691 | if (ret && ret != -ENODATA) | |
2692 | return ret; | |
2693 | xs->not_found = ret; | |
2694 | } | |
2695 | ||
2696 | return 0; | |
2697 | } | |
2698 | ||
139fface JB |
2699 | static int ocfs2_xattr_ibody_init(struct inode *inode, |
2700 | struct buffer_head *di_bh, | |
2701 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2702 | { | |
2703 | int ret; | |
2704 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2705 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2706 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2707 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
2708 | ||
2709 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2710 | ret = -ENOSPC; | |
2711 | goto out; | |
2712 | } | |
2713 | ||
2714 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh, | |
2715 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2716 | if (ret) { | |
2717 | mlog_errno(ret); | |
2718 | goto out; | |
2719 | } | |
2720 | ||
2721 | /* | |
2722 | * Adjust extent record count or inline data size | |
2723 | * to reserve space for extended attribute. | |
2724 | */ | |
2725 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2726 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2727 | le16_add_cpu(&idata->id_count, -xattrsize); | |
2728 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
2729 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2730 | le16_add_cpu(&el->l_count, -(xattrsize / | |
2731 | sizeof(struct ocfs2_extent_rec))); | |
2732 | } | |
2733 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
2734 | ||
2735 | spin_lock(&oi->ip_lock); | |
2736 | oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL; | |
2737 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2738 | spin_unlock(&oi->ip_lock); | |
2739 | ||
ec20cec7 | 2740 | ocfs2_journal_dirty(ctxt->handle, di_bh); |
139fface JB |
2741 | |
2742 | out: | |
2743 | return ret; | |
2744 | } | |
2745 | ||
cf1d6c76 TY |
2746 | /* |
2747 | * ocfs2_xattr_ibody_set() | |
2748 | * | |
2749 | * Set, replace or remove an extended attribute into inode block. | |
2750 | * | |
2751 | */ | |
2752 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2753 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2754 | struct ocfs2_xattr_search *xs, |
2755 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 | 2756 | { |
139fface | 2757 | int ret; |
cf1d6c76 | 2758 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
139fface | 2759 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2760 | |
2761 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2762 | return -ENOSPC; | |
2763 | ||
2764 | down_write(&oi->ip_alloc_sem); | |
139fface JB |
2765 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
2766 | ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt); | |
2767 | if (ret) { | |
2768 | if (ret != -ENOSPC) | |
2769 | mlog_errno(ret); | |
2770 | goto out; | |
2771 | } | |
2772 | } | |
2773 | ||
2774 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, | |
2775 | xs->not_found ? NULL : xs->here); | |
2776 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
2777 | if (ret) { | |
2778 | if (ret != -ENOSPC) | |
2779 | mlog_errno(ret); | |
2780 | goto out; | |
2781 | } | |
2782 | xs->here = loc.xl_entry; | |
2783 | ||
cf1d6c76 TY |
2784 | out: |
2785 | up_write(&oi->ip_alloc_sem); | |
2786 | ||
2787 | return ret; | |
2788 | } | |
2789 | ||
2790 | /* | |
2791 | * ocfs2_xattr_block_find() | |
2792 | * | |
2793 | * Find extended attribute in external block and | |
2794 | * fill search info into struct ocfs2_xattr_search. | |
2795 | */ | |
2796 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2797 | int name_index, | |
2798 | const char *name, | |
2799 | struct ocfs2_xattr_search *xs) | |
2800 | { | |
2801 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2802 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2803 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2804 | int ret = 0; |
2805 | ||
2806 | if (!di->i_xattr_loc) | |
2807 | return ret; | |
2808 | ||
4ae1d69b JB |
2809 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2810 | &blk_bh); | |
cf1d6c76 TY |
2811 | if (ret < 0) { |
2812 | mlog_errno(ret); | |
2813 | return ret; | |
2814 | } | |
f6087fb7 | 2815 | |
cf1d6c76 | 2816 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2817 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2818 | |
2819 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2820 | xs->header = &xb->xb_attrs.xb_header; | |
2821 | xs->base = (void *)xs->header; | |
2822 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2823 | xs->here = xs->header->xh_entries; | |
2824 | ||
2825 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2826 | } else | |
2827 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2828 | name_index, | |
2829 | name, xs); | |
cf1d6c76 | 2830 | |
cf1d6c76 TY |
2831 | if (ret && ret != -ENODATA) { |
2832 | xs->xattr_bh = NULL; | |
2833 | goto cleanup; | |
2834 | } | |
2835 | xs->not_found = ret; | |
2836 | return 0; | |
cf1d6c76 TY |
2837 | cleanup: |
2838 | brelse(blk_bh); | |
2839 | ||
2840 | return ret; | |
2841 | } | |
2842 | ||
d3981544 | 2843 | static int ocfs2_create_xattr_block(struct inode *inode, |
5aea1f0e | 2844 | struct buffer_head *inode_bh, |
d3981544 JB |
2845 | struct ocfs2_xattr_set_ctxt *ctxt, |
2846 | int indexed, | |
2847 | struct buffer_head **ret_bh) | |
5aea1f0e TM |
2848 | { |
2849 | int ret; | |
2850 | u16 suballoc_bit_start; | |
2851 | u32 num_got; | |
2b6cb576 | 2852 | u64 suballoc_loc, first_blkno; |
5aea1f0e | 2853 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; |
5aea1f0e TM |
2854 | struct buffer_head *new_bh = NULL; |
2855 | struct ocfs2_xattr_block *xblk; | |
2856 | ||
d3981544 JB |
2857 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
2858 | inode_bh, OCFS2_JOURNAL_ACCESS_CREATE); | |
5aea1f0e TM |
2859 | if (ret < 0) { |
2860 | mlog_errno(ret); | |
2861 | goto end; | |
2862 | } | |
2863 | ||
1ed9b777 | 2864 | ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1, |
2b6cb576 JB |
2865 | &suballoc_loc, &suballoc_bit_start, |
2866 | &num_got, &first_blkno); | |
5aea1f0e TM |
2867 | if (ret < 0) { |
2868 | mlog_errno(ret); | |
2869 | goto end; | |
2870 | } | |
2871 | ||
2872 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
58796207 RX |
2873 | if (!new_bh) { |
2874 | ret = -ENOMEM; | |
2875 | mlog_errno(ret); | |
2876 | goto end; | |
2877 | } | |
2878 | ||
5aea1f0e TM |
2879 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); |
2880 | ||
d3981544 | 2881 | ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode), |
5aea1f0e TM |
2882 | new_bh, |
2883 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2884 | if (ret < 0) { | |
2885 | mlog_errno(ret); | |
2886 | goto end; | |
2887 | } | |
2888 | ||
2889 | /* Initialize ocfs2_xattr_block */ | |
2890 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2891 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2892 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
d3981544 | 2893 | xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot); |
2b6cb576 | 2894 | xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc); |
5aea1f0e | 2895 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
1ed9b777 JB |
2896 | xblk->xb_fs_generation = |
2897 | cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation); | |
5aea1f0e | 2898 | xblk->xb_blkno = cpu_to_le64(first_blkno); |
a7fe7a3a TM |
2899 | if (indexed) { |
2900 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2901 | xr->xt_clusters = cpu_to_le32(1); | |
2902 | xr->xt_last_eb_blk = 0; | |
2903 | xr->xt_list.l_tree_depth = 0; | |
2904 | xr->xt_list.l_count = cpu_to_le16( | |
2905 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2906 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2907 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2908 | } | |
d3981544 | 2909 | ocfs2_journal_dirty(ctxt->handle, new_bh); |
a7fe7a3a | 2910 | |
d3981544 | 2911 | /* Add it to the inode */ |
5aea1f0e | 2912 | di->i_xattr_loc = cpu_to_le64(first_blkno); |
d3981544 JB |
2913 | |
2914 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2915 | OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
2916 | di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); | |
2917 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2918 | ||
2919 | ocfs2_journal_dirty(ctxt->handle, inode_bh); | |
5aea1f0e TM |
2920 | |
2921 | *ret_bh = new_bh; | |
2922 | new_bh = NULL; | |
2923 | ||
2924 | end: | |
2925 | brelse(new_bh); | |
2926 | return ret; | |
2927 | } | |
2928 | ||
cf1d6c76 TY |
2929 | /* |
2930 | * ocfs2_xattr_block_set() | |
2931 | * | |
2932 | * Set, replace or remove an extended attribute into external block. | |
2933 | * | |
2934 | */ | |
2935 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2936 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2937 | struct ocfs2_xattr_search *xs, |
2938 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2939 | { |
2940 | struct buffer_head *new_bh = NULL; | |
cf1d6c76 | 2941 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 | 2942 | int ret; |
d3981544 | 2943 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2944 | |
2945 | if (!xs->xattr_bh) { | |
d3981544 JB |
2946 | ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt, |
2947 | 0, &new_bh); | |
5aea1f0e | 2948 | if (ret) { |
cf1d6c76 | 2949 | mlog_errno(ret); |
85db90e7 | 2950 | goto end; |
cf1d6c76 TY |
2951 | } |
2952 | ||
cf1d6c76 | 2953 | xs->xattr_bh = new_bh; |
5aea1f0e | 2954 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2955 | xs->header = &xblk->xb_attrs.xb_header; |
2956 | xs->base = (void *)xs->header; | |
2957 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2958 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2959 | } else |
2960 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2961 | ||
2962 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
d3981544 JB |
2963 | ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh, |
2964 | xs->not_found ? NULL : xs->here); | |
01225596 | 2965 | |
d3981544 JB |
2966 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
2967 | if (!ret) | |
2968 | xs->here = loc.xl_entry; | |
5f5261ac | 2969 | else if ((ret != -ENOSPC) || ctxt->set_abort) |
01225596 | 2970 | goto end; |
d3981544 JB |
2971 | else { |
2972 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); | |
2973 | if (ret) | |
2974 | goto end; | |
2975 | } | |
cf1d6c76 TY |
2976 | } |
2977 | ||
d3981544 JB |
2978 | if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED) |
2979 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); | |
01225596 TM |
2980 | |
2981 | end: | |
cf1d6c76 TY |
2982 | return ret; |
2983 | } | |
2984 | ||
78f30c31 TM |
2985 | /* Check whether the new xattr can be inserted into the inode. */ |
2986 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2987 | struct ocfs2_xattr_info *xi, | |
2988 | struct ocfs2_xattr_search *xs) | |
2989 | { | |
78f30c31 TM |
2990 | struct ocfs2_xattr_entry *last; |
2991 | int free, i; | |
2992 | size_t min_offs = xs->end - xs->base; | |
2993 | ||
2994 | if (!xs->header) | |
2995 | return 0; | |
2996 | ||
2997 | last = xs->header->xh_entries; | |
2998 | ||
2999 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
3000 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
3001 | if (offs < min_offs) | |
3002 | min_offs = offs; | |
3003 | last += 1; | |
3004 | } | |
3005 | ||
4442f518 | 3006 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
3007 | if (free < 0) |
3008 | return 0; | |
3009 | ||
3010 | BUG_ON(!xs->not_found); | |
3011 | ||
199799a3 | 3012 | if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi))) |
78f30c31 TM |
3013 | return 1; |
3014 | ||
3015 | return 0; | |
3016 | } | |
3017 | ||
3018 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
3019 | struct ocfs2_dinode *di, | |
3020 | struct ocfs2_xattr_info *xi, | |
3021 | struct ocfs2_xattr_search *xis, | |
3022 | struct ocfs2_xattr_search *xbs, | |
3023 | int *clusters_need, | |
85db90e7 TM |
3024 | int *meta_need, |
3025 | int *credits_need) | |
78f30c31 TM |
3026 | { |
3027 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 3028 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
3029 | struct buffer_head *bh = NULL; |
3030 | struct ocfs2_xattr_block *xb = NULL; | |
3031 | struct ocfs2_xattr_entry *xe = NULL; | |
3032 | struct ocfs2_xattr_value_root *xv = NULL; | |
3033 | char *base = NULL; | |
3034 | int name_offset, name_len = 0; | |
3035 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
6b240ff6 | 3036 | xi->xi_value_len); |
78f30c31 TM |
3037 | u64 value_size; |
3038 | ||
71d548a6 TM |
3039 | /* |
3040 | * Calculate the clusters we need to write. | |
3041 | * No matter whether we replace an old one or add a new one, | |
3042 | * we need this for writing. | |
3043 | */ | |
6b240ff6 | 3044 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
71d548a6 TM |
3045 | credits += new_clusters * |
3046 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3047 | ||
78f30c31 | 3048 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
3049 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3050 | ||
6b240ff6 | 3051 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 | 3052 | clusters_add += new_clusters; |
85db90e7 | 3053 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3054 | &def_xv.xv.xr_list); |
85db90e7 | 3055 | } |
78f30c31 TM |
3056 | |
3057 | goto meta_guess; | |
3058 | } | |
3059 | ||
3060 | if (!xis->not_found) { | |
3061 | xe = xis->here; | |
3062 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3063 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3064 | base = xis->base; | |
85db90e7 | 3065 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 3066 | } else { |
970e4936 | 3067 | int i, block_off = 0; |
78f30c31 TM |
3068 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
3069 | xe = xbs->here; | |
3070 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3071 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3072 | i = xbs->here - xbs->header->xh_entries; | |
3073 | old_in_xb = 1; | |
3074 | ||
3075 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 3076 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
3077 | bucket_xh(xbs->bucket), |
3078 | i, &block_off, | |
3079 | &name_offset); | |
3080 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
3081 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3082 | } else { | |
78f30c31 | 3083 | base = xbs->base; |
85db90e7 TM |
3084 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
3085 | } | |
3086 | } | |
3087 | ||
3088 | /* | |
3089 | * delete a xattr doesn't need metadata and cluster allocation. | |
3090 | * so just calculate the credits and return. | |
3091 | * | |
3092 | * The credits for removing the value tree will be extended | |
3093 | * by ocfs2_remove_extent itself. | |
3094 | */ | |
6b240ff6 | 3095 | if (!xi->xi_value) { |
85db90e7 | 3096 | if (!ocfs2_xattr_is_local(xe)) |
a90714c1 | 3097 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
3098 | |
3099 | goto out; | |
78f30c31 TM |
3100 | } |
3101 | ||
3102 | /* do cluster allocation guess first. */ | |
3103 | value_size = le64_to_cpu(xe->xe_value_size); | |
3104 | ||
3105 | if (old_in_xb) { | |
3106 | /* | |
3107 | * In xattr set, we always try to set the xe in inode first, | |
3108 | * so if it can be inserted into inode successfully, the old | |
3109 | * one will be removed from the xattr block, and this xattr | |
3110 | * will be inserted into inode as a new xattr in inode. | |
3111 | */ | |
3112 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
3113 | clusters_add += new_clusters; | |
a90714c1 | 3114 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
3115 | OCFS2_INODE_UPDATE_CREDITS; |
3116 | if (!ocfs2_xattr_is_local(xe)) | |
3117 | credits += ocfs2_calc_extend_credits( | |
3118 | inode->i_sb, | |
06f9da6e | 3119 | &def_xv.xv.xr_list); |
78f30c31 TM |
3120 | goto out; |
3121 | } | |
3122 | } | |
3123 | ||
6b240ff6 | 3124 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 TM |
3125 | /* the new values will be stored outside. */ |
3126 | u32 old_clusters = 0; | |
3127 | ||
3128 | if (!ocfs2_xattr_is_local(xe)) { | |
3129 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
3130 | value_size); | |
3131 | xv = (struct ocfs2_xattr_value_root *) | |
3132 | (base + name_offset + name_len); | |
97aff52a | 3133 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
3134 | } else |
3135 | xv = &def_xv.xv; | |
3136 | ||
85db90e7 | 3137 | if (old_clusters >= new_clusters) { |
a90714c1 | 3138 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 3139 | goto out; |
85db90e7 | 3140 | } else { |
78f30c31 TM |
3141 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
3142 | clusters_add += new_clusters - old_clusters; | |
85db90e7 | 3143 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3144 | &xv->xr_list); |
97aff52a TM |
3145 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
3146 | goto out; | |
78f30c31 TM |
3147 | } |
3148 | } else { | |
3149 | /* | |
3150 | * Now the new value will be stored inside. So if the new | |
3151 | * value is smaller than the size of value root or the old | |
3152 | * value, we don't need any allocation, otherwise we have | |
3153 | * to guess metadata allocation. | |
3154 | */ | |
6b240ff6 JB |
3155 | if ((ocfs2_xattr_is_local(xe) && |
3156 | (value_size >= xi->xi_value_len)) || | |
78f30c31 | 3157 | (!ocfs2_xattr_is_local(xe) && |
6b240ff6 | 3158 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
78f30c31 TM |
3159 | goto out; |
3160 | } | |
3161 | ||
3162 | meta_guess: | |
3163 | /* calculate metadata allocation. */ | |
3164 | if (di->i_xattr_loc) { | |
3165 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
3166 | ret = ocfs2_read_xattr_block(inode, |
3167 | le64_to_cpu(di->i_xattr_loc), | |
3168 | &bh); | |
78f30c31 TM |
3169 | if (ret) { |
3170 | mlog_errno(ret); | |
3171 | goto out; | |
3172 | } | |
3173 | ||
3174 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
3175 | } else | |
3176 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
3177 | ||
90cb546c TM |
3178 | /* |
3179 | * If there is already an xattr tree, good, we can calculate | |
3180 | * like other b-trees. Otherwise we may have the chance of | |
3181 | * create a tree, the credit calculation is borrowed from | |
3182 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
3183 | * new tree will be cluster based, so no meta is needed. | |
3184 | */ | |
78f30c31 TM |
3185 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
3186 | struct ocfs2_extent_list *el = | |
3187 | &xb->xb_attrs.xb_root.xt_list; | |
3188 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 | 3189 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3190 | el); |
90cb546c TM |
3191 | } else |
3192 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
3193 | |
3194 | /* | |
3195 | * This cluster will be used either for new bucket or for | |
3196 | * new xattr block. | |
3197 | * If the cluster size is the same as the bucket size, one | |
3198 | * more is needed since we may need to extend the bucket | |
3199 | * also. | |
3200 | */ | |
3201 | clusters_add += 1; | |
85db90e7 | 3202 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 3203 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
3204 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
3205 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 3206 | clusters_add += 1; |
85db90e7 TM |
3207 | } |
3208 | } else { | |
85db90e7 | 3209 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
3ed2be71 TS |
3210 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
3211 | struct ocfs2_extent_list *el = &def_xv.xv.xr_list; | |
3212 | meta_add += ocfs2_extend_meta_needed(el); | |
3213 | credits += ocfs2_calc_extend_credits(inode->i_sb, | |
3214 | el); | |
3215 | } else { | |
3216 | meta_add += 1; | |
3217 | } | |
85db90e7 | 3218 | } |
78f30c31 TM |
3219 | out: |
3220 | if (clusters_need) | |
3221 | *clusters_need = clusters_add; | |
3222 | if (meta_need) | |
3223 | *meta_need = meta_add; | |
85db90e7 TM |
3224 | if (credits_need) |
3225 | *credits_need = credits; | |
78f30c31 TM |
3226 | brelse(bh); |
3227 | return ret; | |
3228 | } | |
3229 | ||
3230 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
3231 | struct ocfs2_dinode *di, | |
3232 | struct ocfs2_xattr_info *xi, | |
3233 | struct ocfs2_xattr_search *xis, | |
3234 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 3235 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 3236 | int extra_meta, |
85db90e7 | 3237 | int *credits) |
78f30c31 TM |
3238 | { |
3239 | int clusters_add, meta_add, ret; | |
3240 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3241 | ||
3242 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
3243 | ||
3244 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
3245 | ||
3246 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 3247 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
3248 | if (ret) { |
3249 | mlog_errno(ret); | |
3250 | return ret; | |
3251 | } | |
3252 | ||
492a8a33 | 3253 | meta_add += extra_meta; |
402b4183 TM |
3254 | trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add, |
3255 | clusters_add, *credits); | |
78f30c31 TM |
3256 | |
3257 | if (meta_add) { | |
3258 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
3259 | &ctxt->meta_ac); | |
3260 | if (ret) { | |
3261 | mlog_errno(ret); | |
3262 | goto out; | |
3263 | } | |
3264 | } | |
3265 | ||
3266 | if (clusters_add) { | |
3267 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
3268 | if (ret) | |
3269 | mlog_errno(ret); | |
3270 | } | |
3271 | out: | |
3272 | if (ret) { | |
3273 | if (ctxt->meta_ac) { | |
3274 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
3275 | ctxt->meta_ac = NULL; | |
3276 | } | |
3277 | ||
3278 | /* | |
3279 | * We cannot have an error and a non null ctxt->data_ac. | |
3280 | */ | |
3281 | } | |
3282 | ||
3283 | return ret; | |
3284 | } | |
3285 | ||
85db90e7 TM |
3286 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
3287 | struct ocfs2_dinode *di, | |
3288 | struct ocfs2_xattr_info *xi, | |
3289 | struct ocfs2_xattr_search *xis, | |
3290 | struct ocfs2_xattr_search *xbs, | |
3291 | struct ocfs2_xattr_set_ctxt *ctxt) | |
3292 | { | |
9f868f16 | 3293 | int ret = 0, credits, old_found; |
85db90e7 | 3294 | |
6b240ff6 | 3295 | if (!xi->xi_value) { |
85db90e7 TM |
3296 | /* Remove existing extended attribute */ |
3297 | if (!xis->not_found) | |
3298 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3299 | else if (!xbs->not_found) | |
3300 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3301 | } else { | |
3302 | /* We always try to set extended attribute into inode first*/ | |
3303 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3304 | if (!ret && !xbs->not_found) { | |
3305 | /* | |
3306 | * If succeed and that extended attribute existing in | |
3307 | * external block, then we will remove it. | |
3308 | */ | |
6b240ff6 JB |
3309 | xi->xi_value = NULL; |
3310 | xi->xi_value_len = 0; | |
85db90e7 | 3311 | |
9f868f16 | 3312 | old_found = xis->not_found; |
85db90e7 TM |
3313 | xis->not_found = -ENODATA; |
3314 | ret = ocfs2_calc_xattr_set_need(inode, | |
3315 | di, | |
3316 | xi, | |
3317 | xis, | |
3318 | xbs, | |
3319 | NULL, | |
3320 | NULL, | |
3321 | &credits); | |
9f868f16 | 3322 | xis->not_found = old_found; |
85db90e7 TM |
3323 | if (ret) { |
3324 | mlog_errno(ret); | |
3325 | goto out; | |
3326 | } | |
3327 | ||
c901fb00 | 3328 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3329 | if (ret) { |
3330 | mlog_errno(ret); | |
3331 | goto out; | |
3332 | } | |
3333 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
5f5261ac | 3334 | } else if ((ret == -ENOSPC) && !ctxt->set_abort) { |
85db90e7 TM |
3335 | if (di->i_xattr_loc && !xbs->xattr_bh) { |
3336 | ret = ocfs2_xattr_block_find(inode, | |
6b240ff6 JB |
3337 | xi->xi_name_index, |
3338 | xi->xi_name, xbs); | |
85db90e7 TM |
3339 | if (ret) |
3340 | goto out; | |
3341 | ||
9f868f16 | 3342 | old_found = xis->not_found; |
85db90e7 TM |
3343 | xis->not_found = -ENODATA; |
3344 | ret = ocfs2_calc_xattr_set_need(inode, | |
3345 | di, | |
3346 | xi, | |
3347 | xis, | |
3348 | xbs, | |
3349 | NULL, | |
3350 | NULL, | |
3351 | &credits); | |
9f868f16 | 3352 | xis->not_found = old_found; |
85db90e7 TM |
3353 | if (ret) { |
3354 | mlog_errno(ret); | |
3355 | goto out; | |
3356 | } | |
3357 | ||
c901fb00 | 3358 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3359 | if (ret) { |
3360 | mlog_errno(ret); | |
3361 | goto out; | |
3362 | } | |
3363 | } | |
3364 | /* | |
3365 | * If no space in inode, we will set extended attribute | |
3366 | * into external block. | |
3367 | */ | |
3368 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3369 | if (ret) | |
3370 | goto out; | |
3371 | if (!xis->not_found) { | |
3372 | /* | |
3373 | * If succeed and that extended attribute | |
3374 | * existing in inode, we will remove it. | |
3375 | */ | |
6b240ff6 JB |
3376 | xi->xi_value = NULL; |
3377 | xi->xi_value_len = 0; | |
85db90e7 TM |
3378 | xbs->not_found = -ENODATA; |
3379 | ret = ocfs2_calc_xattr_set_need(inode, | |
3380 | di, | |
3381 | xi, | |
3382 | xis, | |
3383 | xbs, | |
3384 | NULL, | |
3385 | NULL, | |
3386 | &credits); | |
3387 | if (ret) { | |
3388 | mlog_errno(ret); | |
3389 | goto out; | |
3390 | } | |
3391 | ||
c901fb00 | 3392 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3393 | if (ret) { |
3394 | mlog_errno(ret); | |
3395 | goto out; | |
3396 | } | |
3397 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
3398 | xis, ctxt); | |
3399 | } | |
3400 | } | |
3401 | } | |
3402 | ||
4b3f6209 TM |
3403 | if (!ret) { |
3404 | /* Update inode ctime. */ | |
0cf2f763 | 3405 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
3406 | xis->inode_bh, |
3407 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
3408 | if (ret) { |
3409 | mlog_errno(ret); | |
3410 | goto out; | |
3411 | } | |
3412 | ||
3413 | inode->i_ctime = CURRENT_TIME; | |
3414 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
3415 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
3416 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
3417 | } | |
85db90e7 TM |
3418 | out: |
3419 | return ret; | |
3420 | } | |
3421 | ||
6c3faba4 TY |
3422 | /* |
3423 | * This function only called duing creating inode | |
3424 | * for init security/acl xattrs of the new inode. | |
008aafaf | 3425 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
3426 | */ |
3427 | int ocfs2_xattr_set_handle(handle_t *handle, | |
3428 | struct inode *inode, | |
3429 | struct buffer_head *di_bh, | |
3430 | int name_index, | |
3431 | const char *name, | |
3432 | const void *value, | |
3433 | size_t value_len, | |
3434 | int flags, | |
3435 | struct ocfs2_alloc_context *meta_ac, | |
3436 | struct ocfs2_alloc_context *data_ac) | |
3437 | { | |
3438 | struct ocfs2_dinode *di; | |
3439 | int ret; | |
3440 | ||
3441 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3442 | .xi_name_index = name_index, |
3443 | .xi_name = name, | |
18853b95 | 3444 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3445 | .xi_value = value, |
3446 | .xi_value_len = value_len, | |
6c3faba4 TY |
3447 | }; |
3448 | ||
3449 | struct ocfs2_xattr_search xis = { | |
3450 | .not_found = -ENODATA, | |
3451 | }; | |
3452 | ||
3453 | struct ocfs2_xattr_search xbs = { | |
3454 | .not_found = -ENODATA, | |
3455 | }; | |
3456 | ||
3457 | struct ocfs2_xattr_set_ctxt ctxt = { | |
3458 | .handle = handle, | |
3459 | .meta_ac = meta_ac, | |
3460 | .data_ac = data_ac, | |
3461 | }; | |
3462 | ||
3463 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
3464 | return -EOPNOTSUPP; | |
3465 | ||
008aafaf TY |
3466 | /* |
3467 | * In extreme situation, may need xattr bucket when | |
3468 | * block size is too small. And we have already reserved | |
3469 | * the credits for bucket in mknod. | |
3470 | */ | |
3471 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
3472 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3473 | if (!xbs.bucket) { | |
3474 | mlog_errno(-ENOMEM); | |
3475 | return -ENOMEM; | |
3476 | } | |
3477 | } | |
3478 | ||
6c3faba4 TY |
3479 | xis.inode_bh = xbs.inode_bh = di_bh; |
3480 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3481 | ||
3482 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3483 | ||
3484 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3485 | if (ret) | |
3486 | goto cleanup; | |
3487 | if (xis.not_found) { | |
3488 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3489 | if (ret) | |
3490 | goto cleanup; | |
3491 | } | |
3492 | ||
3493 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3494 | ||
3495 | cleanup: | |
3496 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3497 | brelse(xbs.xattr_bh); | |
008aafaf | 3498 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
3499 | |
3500 | return ret; | |
3501 | } | |
3502 | ||
cf1d6c76 TY |
3503 | /* |
3504 | * ocfs2_xattr_set() | |
3505 | * | |
3506 | * Set, replace or remove an extended attribute for this inode. | |
3507 | * value is NULL to remove an existing extended attribute, else either | |
3508 | * create or replace an extended attribute. | |
3509 | */ | |
3510 | int ocfs2_xattr_set(struct inode *inode, | |
3511 | int name_index, | |
3512 | const char *name, | |
3513 | const void *value, | |
3514 | size_t value_len, | |
3515 | int flags) | |
3516 | { | |
3517 | struct buffer_head *di_bh = NULL; | |
3518 | struct ocfs2_dinode *di; | |
492a8a33 | 3519 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 3520 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 3521 | struct inode *tl_inode = osb->osb_tl_inode; |
6ea437a3 | 3522 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, NULL, }; |
492a8a33 | 3523 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
3524 | |
3525 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3526 | .xi_name_index = name_index, |
3527 | .xi_name = name, | |
18853b95 | 3528 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3529 | .xi_value = value, |
3530 | .xi_value_len = value_len, | |
cf1d6c76 TY |
3531 | }; |
3532 | ||
3533 | struct ocfs2_xattr_search xis = { | |
3534 | .not_found = -ENODATA, | |
3535 | }; | |
3536 | ||
3537 | struct ocfs2_xattr_search xbs = { | |
3538 | .not_found = -ENODATA, | |
3539 | }; | |
3540 | ||
8154da3d TY |
3541 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
3542 | return -EOPNOTSUPP; | |
3543 | ||
ba937127 JB |
3544 | /* |
3545 | * Only xbs will be used on indexed trees. xis doesn't need a | |
3546 | * bucket. | |
3547 | */ | |
3548 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3549 | if (!xbs.bucket) { | |
3550 | mlog_errno(-ENOMEM); | |
3551 | return -ENOMEM; | |
3552 | } | |
3553 | ||
cf1d6c76 TY |
3554 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
3555 | if (ret < 0) { | |
3556 | mlog_errno(ret); | |
ba937127 | 3557 | goto cleanup_nolock; |
cf1d6c76 TY |
3558 | } |
3559 | xis.inode_bh = xbs.inode_bh = di_bh; | |
3560 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3561 | ||
3562 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3563 | /* | |
3564 | * Scan inode and external block to find the same name | |
25985edc | 3565 | * extended attribute and collect search information. |
cf1d6c76 TY |
3566 | */ |
3567 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3568 | if (ret) | |
3569 | goto cleanup; | |
3570 | if (xis.not_found) { | |
3571 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3572 | if (ret) | |
3573 | goto cleanup; | |
3574 | } | |
3575 | ||
3576 | if (xis.not_found && xbs.not_found) { | |
3577 | ret = -ENODATA; | |
3578 | if (flags & XATTR_REPLACE) | |
3579 | goto cleanup; | |
3580 | ret = 0; | |
3581 | if (!value) | |
3582 | goto cleanup; | |
3583 | } else { | |
3584 | ret = -EEXIST; | |
3585 | if (flags & XATTR_CREATE) | |
3586 | goto cleanup; | |
3587 | } | |
3588 | ||
25985edc | 3589 | /* Check whether the value is refcounted and do some preparation. */ |
492a8a33 TM |
3590 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && |
3591 | (!xis.not_found || !xbs.not_found)) { | |
3592 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
3593 | &xis, &xbs, &ref_tree, | |
3594 | &ref_meta, &ref_credits); | |
3595 | if (ret) { | |
3596 | mlog_errno(ret); | |
3597 | goto cleanup; | |
3598 | } | |
3599 | } | |
85db90e7 TM |
3600 | |
3601 | mutex_lock(&tl_inode->i_mutex); | |
3602 | ||
3603 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
3604 | ret = __ocfs2_flush_truncate_log(osb); | |
3605 | if (ret < 0) { | |
3606 | mutex_unlock(&tl_inode->i_mutex); | |
3607 | mlog_errno(ret); | |
3608 | goto cleanup; | |
3609 | } | |
3610 | } | |
3611 | mutex_unlock(&tl_inode->i_mutex); | |
3612 | ||
3613 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3614 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3615 | if (ret) { |
3616 | mlog_errno(ret); | |
3617 | goto cleanup; | |
3618 | } | |
3619 | ||
4b3f6209 TM |
3620 | /* we need to update inode's ctime field, so add credit for it. */ |
3621 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3622 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3623 | if (IS_ERR(ctxt.handle)) { |
3624 | ret = PTR_ERR(ctxt.handle); | |
3625 | mlog_errno(ret); | |
6ea437a3 | 3626 | goto out_free_ac; |
cf1d6c76 | 3627 | } |
85db90e7 TM |
3628 | |
3629 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
6fdb702d | 3630 | ocfs2_update_inode_fsync_trans(ctxt.handle, inode, 0); |
85db90e7 TM |
3631 | |
3632 | ocfs2_commit_trans(osb, ctxt.handle); | |
3633 | ||
6ea437a3 | 3634 | out_free_ac: |
78f30c31 TM |
3635 | if (ctxt.data_ac) |
3636 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3637 | if (ctxt.meta_ac) | |
3638 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3639 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3640 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3641 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3642 | |
cf1d6c76 | 3643 | cleanup: |
492a8a33 TM |
3644 | if (ref_tree) |
3645 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3646 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3647 | if (!value && !ret) { |
3648 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3649 | if (ret) | |
3650 | mlog_errno(ret); | |
3651 | } | |
cf1d6c76 | 3652 | ocfs2_inode_unlock(inode, 1); |
ba937127 | 3653 | cleanup_nolock: |
cf1d6c76 TY |
3654 | brelse(di_bh); |
3655 | brelse(xbs.xattr_bh); | |
ba937127 | 3656 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3657 | |
3658 | return ret; | |
3659 | } | |
3660 | ||
0c044f0b TM |
3661 | /* |
3662 | * Find the xattr extent rec which may contains name_hash. | |
3663 | * e_cpos will be the first name hash of the xattr rec. | |
3664 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3665 | */ | |
3666 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3667 | u32 name_hash, | |
3668 | u64 *p_blkno, | |
3669 | u32 *e_cpos, | |
3670 | u32 *num_clusters, | |
3671 | struct ocfs2_extent_list *el) | |
3672 | { | |
3673 | int ret = 0, i; | |
3674 | struct buffer_head *eb_bh = NULL; | |
3675 | struct ocfs2_extent_block *eb; | |
3676 | struct ocfs2_extent_rec *rec = NULL; | |
3677 | u64 e_blkno = 0; | |
3678 | ||
3679 | if (el->l_tree_depth) { | |
facdb77f JB |
3680 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3681 | &eb_bh); | |
0c044f0b TM |
3682 | if (ret) { |
3683 | mlog_errno(ret); | |
3684 | goto out; | |
3685 | } | |
3686 | ||
3687 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3688 | el = &eb->h_list; | |
3689 | ||
3690 | if (el->l_tree_depth) { | |
17a5b9ab | 3691 | ret = ocfs2_error(inode->i_sb, |
7ecef14a JP |
3692 | "Inode %lu has non zero tree depth in xattr tree block %llu\n", |
3693 | inode->i_ino, | |
3694 | (unsigned long long)eb_bh->b_blocknr); | |
0c044f0b TM |
3695 | goto out; |
3696 | } | |
3697 | } | |
3698 | ||
3699 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3700 | rec = &el->l_recs[i]; | |
3701 | ||
3702 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3703 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3704 | break; | |
3705 | } | |
3706 | } | |
3707 | ||
3708 | if (!e_blkno) { | |
7ecef14a JP |
3709 | ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in xattr\n", |
3710 | inode->i_ino, | |
3711 | le32_to_cpu(rec->e_cpos), | |
3712 | ocfs2_rec_clusters(el, rec)); | |
0c044f0b TM |
3713 | goto out; |
3714 | } | |
3715 | ||
3716 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3717 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3718 | if (e_cpos) | |
3719 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3720 | out: | |
3721 | brelse(eb_bh); | |
3722 | return ret; | |
3723 | } | |
3724 | ||
3725 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3726 | struct ocfs2_xattr_bucket *bucket, | |
3727 | void *para); | |
3728 | ||
589dc260 | 3729 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3730 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3731 | int name_index, |
3732 | const char *name, | |
3733 | u32 name_hash, | |
3734 | u16 *xe_index, | |
3735 | int *found) | |
3736 | { | |
3737 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3738 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3739 | size_t name_len = strlen(name); |
3740 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3741 | char *xe_name; |
3742 | ||
3743 | /* | |
3744 | * We don't use binary search in the bucket because there | |
3745 | * may be multiple entries with the same name hash. | |
3746 | */ | |
3747 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3748 | xe = &xh->xh_entries[i]; | |
3749 | ||
3750 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3751 | continue; | |
3752 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3753 | break; | |
3754 | ||
3755 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3756 | if (!cmp) | |
3757 | cmp = name_len - xe->xe_name_len; | |
3758 | if (cmp) | |
3759 | continue; | |
3760 | ||
fd68a894 | 3761 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3762 | xh, |
3763 | i, | |
3764 | &block_off, | |
3765 | &new_offset); | |
3766 | if (ret) { | |
3767 | mlog_errno(ret); | |
3768 | break; | |
3769 | } | |
3770 | ||
970e4936 | 3771 | |
e2356a3f JB |
3772 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3773 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3774 | *xe_index = i; |
3775 | *found = 1; | |
3776 | ret = 0; | |
3777 | break; | |
3778 | } | |
3779 | } | |
3780 | ||
3781 | return ret; | |
3782 | } | |
3783 | ||
3784 | /* | |
3785 | * Find the specified xattr entry in a series of buckets. | |
3786 | * This series start from p_blkno and last for num_clusters. | |
3787 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3788 | * the num of the valid buckets. | |
3789 | * | |
3790 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3791 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3792 | */ | |
3793 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3794 | int name_index, | |
3795 | const char *name, | |
3796 | u32 name_hash, | |
3797 | u64 p_blkno, | |
3798 | u32 first_hash, | |
3799 | u32 num_clusters, | |
3800 | struct ocfs2_xattr_search *xs) | |
3801 | { | |
3802 | int ret, found = 0; | |
589dc260 TM |
3803 | struct ocfs2_xattr_header *xh = NULL; |
3804 | struct ocfs2_xattr_entry *xe = NULL; | |
3805 | u16 index = 0; | |
3806 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3807 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3808 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3809 | u32 last_hash; |
e2356a3f | 3810 | u64 blkno, lower_blkno = 0; |
589dc260 | 3811 | |
e2356a3f JB |
3812 | search = ocfs2_xattr_bucket_new(inode); |
3813 | if (!search) { | |
3814 | ret = -ENOMEM; | |
3815 | mlog_errno(ret); | |
3816 | goto out; | |
3817 | } | |
3818 | ||
3819 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3820 | if (ret) { |
3821 | mlog_errno(ret); | |
3822 | goto out; | |
3823 | } | |
3824 | ||
e2356a3f | 3825 | xh = bucket_xh(search); |
589dc260 | 3826 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3827 | while (low_bucket <= high_bucket) { |
e2356a3f | 3828 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3829 | |
e2356a3f | 3830 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3831 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3832 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3833 | if (ret) { |
3834 | mlog_errno(ret); | |
3835 | goto out; | |
3836 | } | |
3837 | ||
e2356a3f | 3838 | xh = bucket_xh(search); |
589dc260 TM |
3839 | xe = &xh->xh_entries[0]; |
3840 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3841 | high_bucket = bucket - 1; | |
3842 | continue; | |
3843 | } | |
3844 | ||
3845 | /* | |
3846 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3847 | * bucket is larger than the search one. for an empty |
3848 | * bucket, the last one is also the first one. | |
589dc260 | 3849 | */ |
5a095611 TM |
3850 | if (xh->xh_count) |
3851 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3852 | ||
589dc260 TM |
3853 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3854 | ||
e2356a3f JB |
3855 | /* record lower_blkno which may be the insert place. */ |
3856 | lower_blkno = blkno; | |
589dc260 TM |
3857 | |
3858 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3859 | low_bucket = bucket + 1; | |
3860 | continue; | |
3861 | } | |
3862 | ||
3863 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3864 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3865 | name_index, name, name_hash, |
3866 | &index, &found); | |
3867 | if (ret) { | |
3868 | mlog_errno(ret); | |
3869 | goto out; | |
3870 | } | |
3871 | break; | |
3872 | } | |
3873 | ||
3874 | /* | |
3875 | * Record the bucket we have found. | |
3876 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3877 | * always set it to the previous bucket. | |
3878 | */ | |
e2356a3f JB |
3879 | if (!lower_blkno) |
3880 | lower_blkno = p_blkno; | |
3881 | ||
3882 | /* This should be in cache - we just read it during the search */ | |
3883 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3884 | if (ret) { | |
3885 | mlog_errno(ret); | |
3886 | goto out; | |
589dc260 | 3887 | } |
589dc260 | 3888 | |
ba937127 JB |
3889 | xs->header = bucket_xh(xs->bucket); |
3890 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3891 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3892 | ||
3893 | if (found) { | |
589dc260 | 3894 | xs->here = &xs->header->xh_entries[index]; |
402b4183 TM |
3895 | trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno, |
3896 | name, name_index, name_hash, | |
3897 | (unsigned long long)bucket_blkno(xs->bucket), | |
3898 | index); | |
589dc260 TM |
3899 | } else |
3900 | ret = -ENODATA; | |
3901 | ||
3902 | out: | |
e2356a3f | 3903 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3904 | return ret; |
3905 | } | |
3906 | ||
3907 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3908 | struct buffer_head *root_bh, | |
3909 | int name_index, | |
3910 | const char *name, | |
3911 | struct ocfs2_xattr_search *xs) | |
3912 | { | |
3913 | int ret; | |
3914 | struct ocfs2_xattr_block *xb = | |
3915 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3916 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3917 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3918 | u64 p_blkno = 0; | |
3919 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3920 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3921 | |
3922 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3923 | return -ENODATA; | |
3924 | ||
402b4183 TM |
3925 | trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno, |
3926 | name, name_index, name_hash, | |
3927 | (unsigned long long)root_bh->b_blocknr, | |
3928 | -1); | |
589dc260 TM |
3929 | |
3930 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3931 | &num_clusters, el); | |
3932 | if (ret) { | |
3933 | mlog_errno(ret); | |
3934 | goto out; | |
3935 | } | |
3936 | ||
3937 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3938 | ||
402b4183 TM |
3939 | trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno, |
3940 | name, name_index, first_hash, | |
3941 | (unsigned long long)p_blkno, | |
3942 | num_clusters); | |
589dc260 TM |
3943 | |
3944 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3945 | p_blkno, first_hash, num_clusters, xs); | |
3946 | ||
3947 | out: | |
3948 | return ret; | |
3949 | } | |
3950 | ||
0c044f0b TM |
3951 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3952 | u64 blkno, | |
3953 | u32 clusters, | |
3954 | xattr_bucket_func *func, | |
3955 | void *para) | |
3956 | { | |
6dde41d9 | 3957 | int i, ret = 0; |
0c044f0b TM |
3958 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3959 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3960 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3961 | |
ba937127 JB |
3962 | bucket = ocfs2_xattr_bucket_new(inode); |
3963 | if (!bucket) { | |
3964 | mlog_errno(-ENOMEM); | |
3965 | return -ENOMEM; | |
3966 | } | |
0c044f0b | 3967 | |
402b4183 TM |
3968 | trace_ocfs2_iterate_xattr_buckets( |
3969 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
3970 | (unsigned long long)blkno, clusters); | |
0c044f0b | 3971 | |
ba937127 JB |
3972 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3973 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3974 | if (ret) { |
3975 | mlog_errno(ret); | |
ba937127 | 3976 | break; |
0c044f0b TM |
3977 | } |
3978 | ||
0c044f0b TM |
3979 | /* |
3980 | * The real bucket num in this series of blocks is stored | |
3981 | * in the 1st bucket. | |
3982 | */ | |
3983 | if (i == 0) | |
ba937127 | 3984 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3985 | |
402b4183 | 3986 | trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno, |
ba937127 | 3987 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3988 | if (func) { |
ba937127 | 3989 | ret = func(inode, bucket, para); |
a46fa684 | 3990 | if (ret && ret != -ERANGE) |
0c044f0b | 3991 | mlog_errno(ret); |
ba937127 | 3992 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3993 | } |
3994 | ||
ba937127 JB |
3995 | ocfs2_xattr_bucket_relse(bucket); |
3996 | if (ret) | |
3997 | break; | |
0c044f0b TM |
3998 | } |
3999 | ||
ba937127 | 4000 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
4001 | return ret; |
4002 | } | |
4003 | ||
4004 | struct ocfs2_xattr_tree_list { | |
4005 | char *buffer; | |
4006 | size_t buffer_size; | |
936b8834 | 4007 | size_t result; |
0c044f0b TM |
4008 | }; |
4009 | ||
fd68a894 | 4010 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
4011 | struct ocfs2_xattr_header *xh, |
4012 | int index, | |
4013 | int *block_off, | |
4014 | int *new_offset) | |
4015 | { | |
4016 | u16 name_offset; | |
4017 | ||
4018 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
4019 | return -EINVAL; | |
4020 | ||
4021 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
4022 | ||
fd68a894 TM |
4023 | *block_off = name_offset >> sb->s_blocksize_bits; |
4024 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
4025 | |
4026 | return 0; | |
4027 | } | |
4028 | ||
4029 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
4030 | struct ocfs2_xattr_bucket *bucket, | |
4031 | void *para) | |
4032 | { | |
936b8834 | 4033 | int ret = 0, type; |
0c044f0b | 4034 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 4035 | int i, block_off, new_offset; |
936b8834 | 4036 | const char *prefix, *name; |
0c044f0b | 4037 | |
3e632946 JB |
4038 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
4039 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
4040 | type = ocfs2_xattr_get_type(entry); |
4041 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 4042 | |
936b8834 | 4043 | if (prefix) { |
fd68a894 | 4044 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 4045 | bucket_xh(bucket), |
0c044f0b TM |
4046 | i, |
4047 | &block_off, | |
4048 | &new_offset); | |
4049 | if (ret) | |
4050 | break; | |
936b8834 | 4051 | |
51def39f | 4052 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
4053 | new_offset; |
4054 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
4055 | xl->buffer_size, | |
4056 | &xl->result, | |
4057 | prefix, name, | |
4058 | entry->xe_name_len); | |
4059 | if (ret) | |
4060 | break; | |
0c044f0b TM |
4061 | } |
4062 | } | |
4063 | ||
4064 | return ret; | |
4065 | } | |
4066 | ||
47bca495 TM |
4067 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
4068 | struct buffer_head *blk_bh, | |
4069 | xattr_tree_rec_func *rec_func, | |
4070 | void *para) | |
0c044f0b | 4071 | { |
47bca495 TM |
4072 | struct ocfs2_xattr_block *xb = |
4073 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
4074 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
4075 | int ret = 0; |
4076 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
4077 | u64 p_blkno = 0; | |
0c044f0b | 4078 | |
47bca495 | 4079 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
4080 | return 0; |
4081 | ||
4082 | while (name_hash > 0) { | |
4083 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4084 | &e_cpos, &num_clusters, el); | |
4085 | if (ret) { | |
4086 | mlog_errno(ret); | |
47bca495 | 4087 | break; |
0c044f0b TM |
4088 | } |
4089 | ||
47bca495 TM |
4090 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
4091 | num_clusters, para); | |
0c044f0b | 4092 | if (ret) { |
a46fa684 TM |
4093 | if (ret != -ERANGE) |
4094 | mlog_errno(ret); | |
47bca495 | 4095 | break; |
0c044f0b TM |
4096 | } |
4097 | ||
4098 | if (e_cpos == 0) | |
4099 | break; | |
4100 | ||
4101 | name_hash = e_cpos - 1; | |
4102 | } | |
4103 | ||
47bca495 TM |
4104 | return ret; |
4105 | ||
4106 | } | |
4107 | ||
4108 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
4109 | struct buffer_head *root_bh, | |
4110 | u64 blkno, u32 cpos, u32 len, void *para) | |
4111 | { | |
4112 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
4113 | ocfs2_list_xattr_bucket, para); | |
4114 | } | |
4115 | ||
4116 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
4117 | struct buffer_head *blk_bh, | |
4118 | char *buffer, | |
4119 | size_t buffer_size) | |
4120 | { | |
4121 | int ret; | |
4122 | struct ocfs2_xattr_tree_list xl = { | |
4123 | .buffer = buffer, | |
4124 | .buffer_size = buffer_size, | |
4125 | .result = 0, | |
4126 | }; | |
4127 | ||
4128 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
4129 | ocfs2_list_xattr_tree_rec, &xl); | |
4130 | if (ret) { | |
4131 | mlog_errno(ret); | |
4132 | goto out; | |
4133 | } | |
4134 | ||
936b8834 | 4135 | ret = xl.result; |
0c044f0b TM |
4136 | out: |
4137 | return ret; | |
4138 | } | |
01225596 TM |
4139 | |
4140 | static int cmp_xe(const void *a, const void *b) | |
4141 | { | |
4142 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4143 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
4144 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
4145 | ||
4146 | if (l_hash > r_hash) | |
4147 | return 1; | |
4148 | if (l_hash < r_hash) | |
4149 | return -1; | |
4150 | return 0; | |
4151 | } | |
4152 | ||
4153 | static void swap_xe(void *a, void *b, int size) | |
4154 | { | |
4155 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
4156 | ||
4157 | tmp = *l; | |
4158 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
4159 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
4160 | } | |
4161 | ||
4162 | /* | |
4163 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
4164 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
4165 | * The header goes at the start of the bucket, and the names+values are |
4166 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
4167 | * Note: we need to sort the entries since they are not saved in order |
4168 | * in the ocfs2_xattr_block. | |
4169 | */ | |
4170 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
4171 | struct buffer_head *xb_bh, | |
178eeac3 | 4172 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
4173 | { |
4174 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 4175 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
4176 | u16 offset, size, off_change; |
4177 | struct ocfs2_xattr_entry *xe; | |
4178 | struct ocfs2_xattr_block *xb = | |
4179 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4180 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 4181 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4182 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
4183 | char *src = xb_bh->b_data; |
4184 | char *target = bucket_block(bucket, blks - 1); | |
01225596 | 4185 | |
402b4183 TM |
4186 | trace_ocfs2_cp_xattr_block_to_bucket_begin( |
4187 | (unsigned long long)xb_bh->b_blocknr, | |
4188 | (unsigned long long)bucket_blkno(bucket)); | |
178eeac3 JB |
4189 | |
4190 | for (i = 0; i < blks; i++) | |
4191 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 4192 | |
01225596 TM |
4193 | /* |
4194 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
4195 | * there is a offset change corresponding to the change of | |
4196 | * ocfs2_xattr_header's position. | |
4197 | */ | |
4198 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4199 | xe = &xb_xh->xh_entries[count - 1]; | |
4200 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
4201 | size = blocksize - offset; | |
4202 | ||
4203 | /* copy all the names and values. */ | |
01225596 TM |
4204 | memcpy(target + offset, src + offset, size); |
4205 | ||
4206 | /* Init new header now. */ | |
4207 | xh->xh_count = xb_xh->xh_count; | |
4208 | xh->xh_num_buckets = cpu_to_le16(1); | |
4209 | xh->xh_name_value_len = cpu_to_le16(size); | |
4210 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
4211 | ||
4212 | /* copy all the entries. */ | |
178eeac3 | 4213 | target = bucket_block(bucket, 0); |
01225596 TM |
4214 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
4215 | size = count * sizeof(struct ocfs2_xattr_entry); | |
4216 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
4217 | ||
4218 | /* Change the xe offset for all the xe because of the move. */ | |
4219 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
4220 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4221 | for (i = 0; i < count; i++) | |
4222 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
4223 | ||
402b4183 | 4224 | trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change); |
01225596 TM |
4225 | |
4226 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
4227 | cmp_xe, swap_xe); | |
4228 | } | |
4229 | ||
4230 | /* | |
4231 | * After we move xattr from block to index btree, we have to | |
4232 | * update ocfs2_xattr_search to the new xe and base. | |
4233 | * | |
4234 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
4235 | * While if the entry is in index b-tree, "bucket" indicates the | |
4236 | * real place of the xattr. | |
4237 | */ | |
178eeac3 JB |
4238 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
4239 | struct ocfs2_xattr_search *xs, | |
4240 | struct buffer_head *old_bh) | |
01225596 | 4241 | { |
01225596 TM |
4242 | char *buf = old_bh->b_data; |
4243 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
4244 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 4245 | int i; |
01225596 | 4246 | |
ba937127 | 4247 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 4248 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
4249 | xs->end = xs->base + inode->i_sb->s_blocksize; |
4250 | ||
178eeac3 JB |
4251 | if (xs->not_found) |
4252 | return; | |
01225596 | 4253 | |
178eeac3 JB |
4254 | i = xs->here - old_xh->xh_entries; |
4255 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
4256 | } |
4257 | ||
4258 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
4259 | struct ocfs2_xattr_search *xs, |
4260 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4261 | { |
85db90e7 | 4262 | int ret; |
01225596 TM |
4263 | u32 bit_off, len; |
4264 | u64 blkno; | |
85db90e7 | 4265 | handle_t *handle = ctxt->handle; |
01225596 | 4266 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
01225596 TM |
4267 | struct buffer_head *xb_bh = xs->xattr_bh; |
4268 | struct ocfs2_xattr_block *xb = | |
4269 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4270 | struct ocfs2_xattr_tree_root *xr; | |
4271 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 | 4272 | |
402b4183 TM |
4273 | trace_ocfs2_xattr_create_index_block_begin( |
4274 | (unsigned long long)xb_bh->b_blocknr); | |
01225596 TM |
4275 | |
4276 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 4277 | BUG_ON(!xs->bucket); |
01225596 | 4278 | |
01225596 TM |
4279 | /* |
4280 | * XXX: | |
4281 | * We can use this lock for now, and maybe move to a dedicated mutex | |
4282 | * if performance becomes a problem later. | |
4283 | */ | |
4284 | down_write(&oi->ip_alloc_sem); | |
4285 | ||
0cf2f763 | 4286 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 4287 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4288 | if (ret) { |
4289 | mlog_errno(ret); | |
85db90e7 | 4290 | goto out; |
01225596 TM |
4291 | } |
4292 | ||
1ed9b777 | 4293 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, |
78f30c31 | 4294 | 1, 1, &bit_off, &len); |
01225596 TM |
4295 | if (ret) { |
4296 | mlog_errno(ret); | |
85db90e7 | 4297 | goto out; |
01225596 TM |
4298 | } |
4299 | ||
4300 | /* | |
4301 | * The bucket may spread in many blocks, and | |
4302 | * we will only touch the 1st block and the last block | |
4303 | * in the whole bucket(one for entry and one for data). | |
4304 | */ | |
4305 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
4306 | ||
402b4183 | 4307 | trace_ocfs2_xattr_create_index_block((unsigned long long)blkno); |
01225596 | 4308 | |
9c339255 | 4309 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno, 1); |
178eeac3 | 4310 | if (ret) { |
01225596 | 4311 | mlog_errno(ret); |
85db90e7 | 4312 | goto out; |
01225596 TM |
4313 | } |
4314 | ||
178eeac3 JB |
4315 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
4316 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
4317 | if (ret) { |
4318 | mlog_errno(ret); | |
85db90e7 | 4319 | goto out; |
01225596 TM |
4320 | } |
4321 | ||
178eeac3 JB |
4322 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
4323 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 4324 | |
178eeac3 | 4325 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
4326 | |
4327 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
4328 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
4329 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
4330 | ||
4331 | xr = &xb->xb_attrs.xb_root; | |
4332 | xr->xt_clusters = cpu_to_le32(1); | |
4333 | xr->xt_last_eb_blk = 0; | |
4334 | xr->xt_list.l_tree_depth = 0; | |
4335 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
4336 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
4337 | ||
4338 | xr->xt_list.l_recs[0].e_cpos = 0; | |
4339 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
4340 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
4341 | ||
4342 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
4343 | ||
85db90e7 | 4344 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 4345 | |
85db90e7 | 4346 | out: |
01225596 TM |
4347 | up_write(&oi->ip_alloc_sem); |
4348 | ||
01225596 TM |
4349 | return ret; |
4350 | } | |
4351 | ||
4352 | static int cmp_xe_offset(const void *a, const void *b) | |
4353 | { | |
4354 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4355 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
4356 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
4357 | ||
4358 | if (l_name_offset < r_name_offset) | |
4359 | return 1; | |
4360 | if (l_name_offset > r_name_offset) | |
4361 | return -1; | |
4362 | return 0; | |
4363 | } | |
4364 | ||
4365 | /* | |
4366 | * defrag a xattr bucket if we find that the bucket has some | |
4367 | * holes beteen name/value pairs. | |
4368 | * We will move all the name/value pairs to the end of the bucket | |
4369 | * so that we can spare some space for insertion. | |
4370 | */ | |
4371 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 4372 | handle_t *handle, |
01225596 TM |
4373 | struct ocfs2_xattr_bucket *bucket) |
4374 | { | |
4375 | int ret, i; | |
199799a3 | 4376 | size_t end, offset, len; |
01225596 TM |
4377 | struct ocfs2_xattr_header *xh; |
4378 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 4379 | u64 blkno = bucket_blkno(bucket); |
01225596 | 4380 | u16 xh_free_start; |
01225596 | 4381 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 4382 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
4383 | |
4384 | /* | |
4385 | * In order to make the operation more efficient and generic, | |
4386 | * we copy all the blocks into a contiguous memory and do the | |
4387 | * defragment there, so if anything is error, we will not touch | |
4388 | * the real block. | |
4389 | */ | |
4390 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
4391 | if (!bucket_buf) { | |
4392 | ret = -EIO; | |
4393 | goto out; | |
4394 | } | |
4395 | ||
4396 | buf = bucket_buf; | |
1c32a2fd TM |
4397 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4398 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 4399 | |
1c32a2fd | 4400 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
4401 | OCFS2_JOURNAL_ACCESS_WRITE); |
4402 | if (ret < 0) { | |
4403 | mlog_errno(ret); | |
85db90e7 | 4404 | goto out; |
01225596 TM |
4405 | } |
4406 | ||
4407 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
4408 | entries = (char *)xh->xh_entries; | |
4409 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4410 | ||
402b4183 | 4411 | trace_ocfs2_defrag_xattr_bucket( |
de29c085 MF |
4412 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
4413 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
4414 | |
4415 | /* | |
4416 | * sort all the entries by their offset. | |
4417 | * the largest will be the first, so that we can | |
4418 | * move them to the end one by one. | |
4419 | */ | |
4420 | sort(entries, le16_to_cpu(xh->xh_count), | |
4421 | sizeof(struct ocfs2_xattr_entry), | |
4422 | cmp_xe_offset, swap_xe); | |
4423 | ||
4424 | /* Move all name/values to the end of the bucket. */ | |
4425 | xe = xh->xh_entries; | |
4426 | end = OCFS2_XATTR_BUCKET_SIZE; | |
4427 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
4428 | offset = le16_to_cpu(xe->xe_name_offset); | |
199799a3 | 4429 | len = namevalue_size_xe(xe); |
01225596 TM |
4430 | |
4431 | /* | |
4432 | * We must make sure that the name/value pair | |
4433 | * exist in the same block. So adjust end to | |
4434 | * the previous block end if needed. | |
4435 | */ | |
4436 | if (((end - len) / blocksize != | |
4437 | (end - 1) / blocksize)) | |
4438 | end = end - end % blocksize; | |
4439 | ||
4440 | if (end > offset + len) { | |
4441 | memmove(bucket_buf + end - len, | |
4442 | bucket_buf + offset, len); | |
4443 | xe->xe_name_offset = cpu_to_le16(end - len); | |
4444 | } | |
4445 | ||
4446 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
4447 | "bucket %llu\n", (unsigned long long)blkno); | |
4448 | ||
4449 | end -= len; | |
4450 | } | |
4451 | ||
4452 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
4453 | "bucket %llu\n", (unsigned long long)blkno); | |
4454 | ||
4455 | if (xh_free_start == end) | |
85db90e7 | 4456 | goto out; |
01225596 TM |
4457 | |
4458 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
4459 | xh->xh_free_start = cpu_to_le16(end); | |
4460 | ||
4461 | /* sort the entries by their name_hash. */ | |
4462 | sort(entries, le16_to_cpu(xh->xh_count), | |
4463 | sizeof(struct ocfs2_xattr_entry), | |
4464 | cmp_xe, swap_xe); | |
4465 | ||
4466 | buf = bucket_buf; | |
1c32a2fd TM |
4467 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4468 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
4469 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 4470 | |
01225596 | 4471 | out: |
01225596 TM |
4472 | kfree(bucket_buf); |
4473 | return ret; | |
4474 | } | |
4475 | ||
4476 | /* | |
b5c03e74 JB |
4477 | * prev_blkno points to the start of an existing extent. new_blkno |
4478 | * points to a newly allocated extent. Because we know each of our | |
4479 | * clusters contains more than bucket, we can easily split one cluster | |
4480 | * at a bucket boundary. So we take the last cluster of the existing | |
4481 | * extent and split it down the middle. We move the last half of the | |
4482 | * buckets in the last cluster of the existing extent over to the new | |
4483 | * extent. | |
01225596 | 4484 | * |
b5c03e74 JB |
4485 | * first_bh is the buffer at prev_blkno so we can update the existing |
4486 | * extent's bucket count. header_bh is the bucket were we were hoping | |
4487 | * to insert our xattr. If the bucket move places the target in the new | |
4488 | * extent, we'll update first_bh and header_bh after modifying the old | |
4489 | * extent. | |
4490 | * | |
4491 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
4492 | */ |
4493 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
4494 | handle_t *handle, | |
41cb8148 JB |
4495 | struct ocfs2_xattr_bucket *first, |
4496 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4497 | u64 new_blkno, |
01225596 TM |
4498 | u32 num_clusters, |
4499 | u32 *first_hash) | |
4500 | { | |
c58b6032 | 4501 | int ret; |
41cb8148 JB |
4502 | struct super_block *sb = inode->i_sb; |
4503 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
4504 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 4505 | int to_move = num_buckets / 2; |
c58b6032 | 4506 | u64 src_blkno; |
41cb8148 JB |
4507 | u64 last_cluster_blkno = bucket_blkno(first) + |
4508 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 4509 | |
41cb8148 JB |
4510 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
4511 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 4512 | |
402b4183 TM |
4513 | trace_ocfs2_mv_xattr_bucket_cross_cluster( |
4514 | (unsigned long long)last_cluster_blkno, | |
4515 | (unsigned long long)new_blkno); | |
01225596 | 4516 | |
41cb8148 | 4517 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
4518 | last_cluster_blkno, new_blkno, |
4519 | to_move, first_hash); | |
01225596 TM |
4520 | if (ret) { |
4521 | mlog_errno(ret); | |
4522 | goto out; | |
4523 | } | |
4524 | ||
c58b6032 JB |
4525 | /* This is the first bucket that got moved */ |
4526 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 4527 | |
b5c03e74 | 4528 | /* |
c58b6032 | 4529 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 4530 | * update first and target. |
b5c03e74 | 4531 | */ |
41cb8148 | 4532 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
4533 | /* Find the block for the new target bucket */ |
4534 | src_blkno = new_blkno + | |
41cb8148 JB |
4535 | (bucket_blkno(target) - src_blkno); |
4536 | ||
4537 | ocfs2_xattr_bucket_relse(first); | |
4538 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 4539 | |
b5c03e74 | 4540 | /* |
c58b6032 | 4541 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
4542 | * journal from ocfs2_cp_xattr_bucket(). |
4543 | */ | |
41cb8148 | 4544 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
4545 | if (ret) { |
4546 | mlog_errno(ret); | |
4547 | goto out; | |
4548 | } | |
41cb8148 JB |
4549 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
4550 | if (ret) | |
b5c03e74 | 4551 | mlog_errno(ret); |
01225596 | 4552 | |
01225596 TM |
4553 | } |
4554 | ||
01225596 | 4555 | out: |
01225596 TM |
4556 | return ret; |
4557 | } | |
4558 | ||
01225596 | 4559 | /* |
80bcaf34 TM |
4560 | * Find the suitable pos when we divide a bucket into 2. |
4561 | * We have to make sure the xattrs with the same hash value exist | |
4562 | * in the same bucket. | |
4563 | * | |
4564 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
4565 | * place where the hash value changes. Try to find the most even split. | |
4566 | * The most common case is that all entries have different hash values, | |
4567 | * and the first check we make will find a place to split. | |
4568 | */ | |
4569 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
4570 | { | |
4571 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
4572 | int count = le16_to_cpu(xh->xh_count); | |
4573 | int delta, middle = count / 2; | |
4574 | ||
4575 | /* | |
4576 | * We start at the middle. Each step gets farther away in both | |
4577 | * directions. We therefore hit the change in hash value | |
4578 | * nearest to the middle. Note that this loop does not execute for | |
4579 | * count < 2. | |
4580 | */ | |
4581 | for (delta = 0; delta < middle; delta++) { | |
4582 | /* Let's check delta earlier than middle */ | |
4583 | if (cmp_xe(&entries[middle - delta - 1], | |
4584 | &entries[middle - delta])) | |
4585 | return middle - delta; | |
4586 | ||
4587 | /* For even counts, don't walk off the end */ | |
4588 | if ((middle + delta + 1) == count) | |
4589 | continue; | |
4590 | ||
4591 | /* Now try delta past middle */ | |
4592 | if (cmp_xe(&entries[middle + delta], | |
4593 | &entries[middle + delta + 1])) | |
4594 | return middle + delta + 1; | |
4595 | } | |
4596 | ||
4597 | /* Every entry had the same hash */ | |
4598 | return count; | |
4599 | } | |
4600 | ||
4601 | /* | |
4602 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4603 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4604 | * |
4605 | * Normally half of the xattrs will be moved. But we have to make | |
4606 | * sure that the xattrs with the same hash value are stored in the | |
4607 | * same bucket. If all the xattrs in this bucket have the same hash | |
4608 | * value, the new bucket will be initialized as an empty one and the | |
4609 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4610 | */ |
80bcaf34 TM |
4611 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4612 | handle_t *handle, | |
4613 | u64 blk, | |
4614 | u64 new_blk, | |
4615 | u32 *first_hash, | |
4616 | int new_bucket_head) | |
01225596 TM |
4617 | { |
4618 | int ret, i; | |
199799a3 | 4619 | int count, start, len, name_value_len = 0, name_offset = 0; |
ba937127 | 4620 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4621 | struct ocfs2_xattr_header *xh; |
4622 | struct ocfs2_xattr_entry *xe; | |
4623 | int blocksize = inode->i_sb->s_blocksize; | |
4624 | ||
402b4183 TM |
4625 | trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk, |
4626 | (unsigned long long)new_blk); | |
01225596 | 4627 | |
ba937127 JB |
4628 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4629 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4630 | if (!s_bucket || !t_bucket) { | |
4631 | ret = -ENOMEM; | |
4632 | mlog_errno(ret); | |
4633 | goto out; | |
4634 | } | |
01225596 | 4635 | |
ba937127 | 4636 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4637 | if (ret) { |
4638 | mlog_errno(ret); | |
4639 | goto out; | |
4640 | } | |
4641 | ||
ba937127 | 4642 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4643 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4644 | if (ret) { |
4645 | mlog_errno(ret); | |
4646 | goto out; | |
4647 | } | |
4648 | ||
784b816a JB |
4649 | /* |
4650 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4651 | * there's no need to read it. | |
4652 | */ | |
9c339255 | 4653 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk, new_bucket_head); |
01225596 TM |
4654 | if (ret) { |
4655 | mlog_errno(ret); | |
4656 | goto out; | |
4657 | } | |
4658 | ||
2b656c1d JB |
4659 | /* |
4660 | * Hey, if we're overwriting t_bucket, what difference does | |
4661 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4662 | * same part of ocfs2_cp_xattr_bucket(). | |
4663 | */ | |
ba937127 | 4664 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4665 | new_bucket_head ? |
4666 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4667 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4668 | if (ret) { | |
4669 | mlog_errno(ret); | |
4670 | goto out; | |
01225596 TM |
4671 | } |
4672 | ||
ba937127 | 4673 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4674 | count = le16_to_cpu(xh->xh_count); |
4675 | start = ocfs2_xattr_find_divide_pos(xh); | |
4676 | ||
4677 | if (start == count) { | |
4678 | xe = &xh->xh_entries[start-1]; | |
4679 | ||
4680 | /* | |
4681 | * initialized a new empty bucket here. | |
4682 | * The hash value is set as one larger than | |
4683 | * that of the last entry in the previous bucket. | |
4684 | */ | |
ba937127 JB |
4685 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4686 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4687 | |
ba937127 | 4688 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4689 | xh->xh_free_start = cpu_to_le16(blocksize); |
4690 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4691 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4692 | ||
4693 | goto set_num_buckets; | |
4694 | } | |
4695 | ||
01225596 | 4696 | /* copy the whole bucket to the new first. */ |
ba937127 | 4697 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4698 | |
4699 | /* update the new bucket. */ | |
ba937127 | 4700 | xh = bucket_xh(t_bucket); |
01225596 TM |
4701 | |
4702 | /* | |
4703 | * Calculate the total name/value len and xh_free_start for | |
4704 | * the old bucket first. | |
4705 | */ | |
4706 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4707 | name_value_len = 0; | |
4708 | for (i = 0; i < start; i++) { | |
4709 | xe = &xh->xh_entries[i]; | |
199799a3 | 4710 | name_value_len += namevalue_size_xe(xe); |
01225596 TM |
4711 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) |
4712 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4713 | } | |
4714 | ||
4715 | /* | |
4716 | * Now begin the modification to the new bucket. | |
4717 | * | |
4718 | * In the new bucket, We just move the xattr entry to the beginning | |
4719 | * and don't touch the name/value. So there will be some holes in the | |
4720 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4721 | * called. | |
4722 | */ | |
4723 | xe = &xh->xh_entries[start]; | |
4724 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
402b4183 TM |
4725 | trace_ocfs2_divide_xattr_bucket_move(len, |
4726 | (int)((char *)xe - (char *)xh), | |
4727 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4728 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4729 | xe = &xh->xh_entries[count - start]; | |
4730 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4731 | memset((char *)xe, 0, len); | |
4732 | ||
4733 | le16_add_cpu(&xh->xh_count, -start); | |
4734 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4735 | ||
4736 | /* Calculate xh_free_start for the new bucket. */ | |
4737 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4738 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4739 | xe = &xh->xh_entries[i]; | |
01225596 TM |
4740 | if (le16_to_cpu(xe->xe_name_offset) < |
4741 | le16_to_cpu(xh->xh_free_start)) | |
4742 | xh->xh_free_start = xe->xe_name_offset; | |
4743 | } | |
4744 | ||
80bcaf34 | 4745 | set_num_buckets: |
01225596 TM |
4746 | /* set xh->xh_num_buckets for the new xh. */ |
4747 | if (new_bucket_head) | |
4748 | xh->xh_num_buckets = cpu_to_le16(1); | |
4749 | else | |
4750 | xh->xh_num_buckets = 0; | |
4751 | ||
ba937127 | 4752 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4753 | |
4754 | /* store the first_hash of the new bucket. */ | |
4755 | if (first_hash) | |
4756 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4757 | ||
4758 | /* | |
80bcaf34 TM |
4759 | * Now only update the 1st block of the old bucket. If we |
4760 | * just added a new empty bucket, there is no need to modify | |
4761 | * it. | |
01225596 | 4762 | */ |
80bcaf34 TM |
4763 | if (start == count) |
4764 | goto out; | |
4765 | ||
ba937127 | 4766 | xh = bucket_xh(s_bucket); |
01225596 TM |
4767 | memset(&xh->xh_entries[start], 0, |
4768 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4769 | xh->xh_count = cpu_to_le16(start); | |
4770 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4771 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4772 | ||
ba937127 | 4773 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4774 | |
4775 | out: | |
ba937127 JB |
4776 | ocfs2_xattr_bucket_free(s_bucket); |
4777 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4778 | |
4779 | return ret; | |
4780 | } | |
4781 | ||
4782 | /* | |
4783 | * Copy xattr from one bucket to another bucket. | |
4784 | * | |
4785 | * The caller must make sure that the journal transaction | |
4786 | * has enough space for journaling. | |
4787 | */ | |
4788 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4789 | handle_t *handle, | |
4790 | u64 s_blkno, | |
4791 | u64 t_blkno, | |
4792 | int t_is_new) | |
4793 | { | |
4980c6da | 4794 | int ret; |
ba937127 | 4795 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4796 | |
4797 | BUG_ON(s_blkno == t_blkno); | |
4798 | ||
402b4183 TM |
4799 | trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno, |
4800 | (unsigned long long)t_blkno, | |
4801 | t_is_new); | |
01225596 | 4802 | |
ba937127 JB |
4803 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4804 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4805 | if (!s_bucket || !t_bucket) { | |
4806 | ret = -ENOMEM; | |
4807 | mlog_errno(ret); | |
4808 | goto out; | |
4809 | } | |
92de109a | 4810 | |
ba937127 | 4811 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4812 | if (ret) |
4813 | goto out; | |
4814 | ||
784b816a JB |
4815 | /* |
4816 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4817 | * there's no need to read it. | |
4818 | */ | |
9c339255 | 4819 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno, t_is_new); |
01225596 TM |
4820 | if (ret) |
4821 | goto out; | |
4822 | ||
2b656c1d JB |
4823 | /* |
4824 | * Hey, if we're overwriting t_bucket, what difference does | |
4825 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4826 | * cluster to fill, we came here from |
4827 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4828 | * ACCESS_CREATE is required. But we also might have moved data | |
4829 | * out of t_bucket before extending back into it. | |
4830 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4831 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4832 | * and copied out the end of the old extent. Then it re-extends |
4833 | * the old extent back to create space for new xattrs. That's | |
4834 | * how we get here, and the bucket isn't really new. | |
4835 | */ | |
ba937127 | 4836 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4837 | t_is_new ? |
4838 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4839 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4840 | if (ret) | |
4841 | goto out; | |
01225596 | 4842 | |
ba937127 JB |
4843 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4844 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4845 | |
4846 | out: | |
ba937127 JB |
4847 | ocfs2_xattr_bucket_free(t_bucket); |
4848 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4849 | |
4850 | return ret; | |
4851 | } | |
4852 | ||
4853 | /* | |
874d65af JB |
4854 | * src_blk points to the start of an existing extent. last_blk points to |
4855 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4856 | * extent. We copy the buckets from the cluster at last_blk to the new |
4857 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4858 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4859 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4860 | * by the same amount. | |
01225596 | 4861 | */ |
54ecb6b6 JB |
4862 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4863 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4864 | unsigned int start_bucket, | |
4865 | u32 *first_hash) | |
01225596 TM |
4866 | { |
4867 | int i, ret, credits; | |
4868 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4869 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4870 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4871 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4872 | |
402b4183 TM |
4873 | trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk, |
4874 | (unsigned long long)to_blk); | |
01225596 | 4875 | |
54ecb6b6 JB |
4876 | BUG_ON(start_bucket >= num_buckets); |
4877 | if (start_bucket) { | |
4878 | num_buckets -= start_bucket; | |
4879 | last_blk += (start_bucket * blks_per_bucket); | |
4880 | } | |
4881 | ||
15d60929 JB |
4882 | /* The first bucket of the original extent */ |
4883 | old_first = ocfs2_xattr_bucket_new(inode); | |
4884 | /* The first bucket of the new extent */ | |
4885 | new_first = ocfs2_xattr_bucket_new(inode); | |
4886 | if (!old_first || !new_first) { | |
4887 | ret = -ENOMEM; | |
4888 | mlog_errno(ret); | |
4889 | goto out; | |
4890 | } | |
4891 | ||
874d65af | 4892 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4893 | if (ret) { |
4894 | mlog_errno(ret); | |
4895 | goto out; | |
4896 | } | |
4897 | ||
01225596 | 4898 | /* |
54ecb6b6 JB |
4899 | * We need to update the first bucket of the old extent and all |
4900 | * the buckets going to the new extent. | |
01225596 | 4901 | */ |
c901fb00 | 4902 | credits = ((num_buckets + 1) * blks_per_bucket); |
01225596 TM |
4903 | ret = ocfs2_extend_trans(handle, credits); |
4904 | if (ret) { | |
4905 | mlog_errno(ret); | |
4906 | goto out; | |
4907 | } | |
4908 | ||
15d60929 JB |
4909 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4910 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4911 | if (ret) { |
4912 | mlog_errno(ret); | |
4913 | goto out; | |
4914 | } | |
4915 | ||
4916 | for (i = 0; i < num_buckets; i++) { | |
4917 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4918 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4919 | to_blk + (i * blks_per_bucket), |
4920 | 1); | |
01225596 TM |
4921 | if (ret) { |
4922 | mlog_errno(ret); | |
4923 | goto out; | |
4924 | } | |
01225596 TM |
4925 | } |
4926 | ||
15d60929 JB |
4927 | /* |
4928 | * Get the new bucket ready before we dirty anything | |
4929 | * (This actually shouldn't fail, because we already dirtied | |
4930 | * it once in ocfs2_cp_xattr_bucket()). | |
4931 | */ | |
4932 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4933 | if (ret) { | |
01225596 TM |
4934 | mlog_errno(ret); |
4935 | goto out; | |
4936 | } | |
15d60929 JB |
4937 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4938 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4939 | if (ret) { |
4940 | mlog_errno(ret); | |
4941 | goto out; | |
4942 | } | |
4943 | ||
15d60929 JB |
4944 | /* Now update the headers */ |
4945 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4946 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4947 | |
15d60929 JB |
4948 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4949 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4950 | |
4951 | if (first_hash) | |
15d60929 JB |
4952 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4953 | ||
01225596 | 4954 | out: |
15d60929 JB |
4955 | ocfs2_xattr_bucket_free(new_first); |
4956 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4957 | return ret; |
4958 | } | |
4959 | ||
4960 | /* | |
80bcaf34 | 4961 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4962 | * This function should only be called when bucket size == cluster size. |
4963 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4964 | */ | |
80bcaf34 TM |
4965 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4966 | handle_t *handle, | |
4967 | u64 prev_blk, | |
4968 | u64 new_blk, | |
4969 | u32 *first_hash) | |
01225596 TM |
4970 | { |
4971 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
c901fb00 | 4972 | int ret, credits = 2 * blk_per_bucket; |
01225596 TM |
4973 | |
4974 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4975 | ||
4976 | ret = ocfs2_extend_trans(handle, credits); | |
4977 | if (ret) { | |
4978 | mlog_errno(ret); | |
4979 | return ret; | |
4980 | } | |
4981 | ||
4982 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4983 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4984 | new_blk, first_hash, 1); | |
01225596 TM |
4985 | } |
4986 | ||
4987 | /* | |
4988 | * Move some xattrs from the old cluster to the new one since they are not | |
4989 | * contiguous in ocfs2 xattr tree. | |
4990 | * | |
4991 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4992 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4993 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4994 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4995 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4996 | * to extend the insert bucket. | |
4997 | * | |
4998 | * The problem is how much xattr should we move to the new one and when should | |
4999 | * we update first_bh and header_bh? | |
5000 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
5001 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
5002 | * update the first_bh and header_bh if the insert bucket has been moved | |
5003 | * to the new cluster. | |
5004 | * 2. If cluster_size == bucket_size: | |
5005 | * a) If the previous extent rec has more than one cluster and the insert | |
5006 | * place isn't in the last cluster, copy the entire last cluster to the | |
5007 | * new one. This time, we don't need to upate the first_bh and header_bh | |
5008 | * since they will not be moved into the new cluster. | |
5009 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
5010 | * the new one. And we set the extend flag to zero if the insert place is | |
5011 | * moved into the new allocated cluster since no extend is needed. | |
5012 | */ | |
5013 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
5014 | handle_t *handle, | |
012ee910 JB |
5015 | struct ocfs2_xattr_bucket *first, |
5016 | struct ocfs2_xattr_bucket *target, | |
01225596 | 5017 | u64 new_blk, |
01225596 TM |
5018 | u32 prev_clusters, |
5019 | u32 *v_start, | |
5020 | int *extend) | |
5021 | { | |
92cf3adf | 5022 | int ret; |
01225596 | 5023 | |
402b4183 TM |
5024 | trace_ocfs2_adjust_xattr_cross_cluster( |
5025 | (unsigned long long)bucket_blkno(first), | |
5026 | (unsigned long long)new_blk, prev_clusters); | |
01225596 | 5027 | |
41cb8148 | 5028 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
5029 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
5030 | handle, | |
41cb8148 | 5031 | first, target, |
01225596 | 5032 | new_blk, |
01225596 TM |
5033 | prev_clusters, |
5034 | v_start); | |
012ee910 | 5035 | if (ret) |
41cb8148 | 5036 | mlog_errno(ret); |
41cb8148 | 5037 | } else { |
92cf3adf JB |
5038 | /* The start of the last cluster in the first extent */ |
5039 | u64 last_blk = bucket_blkno(first) + | |
5040 | ((prev_clusters - 1) * | |
5041 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 5042 | |
012ee910 | 5043 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 5044 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 5045 | bucket_blkno(first), |
54ecb6b6 | 5046 | last_blk, new_blk, 0, |
01225596 | 5047 | v_start); |
012ee910 JB |
5048 | if (ret) |
5049 | mlog_errno(ret); | |
5050 | } else { | |
80bcaf34 TM |
5051 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
5052 | last_blk, new_blk, | |
5053 | v_start); | |
012ee910 JB |
5054 | if (ret) |
5055 | mlog_errno(ret); | |
01225596 | 5056 | |
92cf3adf | 5057 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
5058 | *extend = 0; |
5059 | } | |
5060 | } | |
5061 | ||
5062 | return ret; | |
5063 | } | |
5064 | ||
5065 | /* | |
5066 | * Add a new cluster for xattr storage. | |
5067 | * | |
5068 | * If the new cluster is contiguous with the previous one, it will be | |
5069 | * appended to the same extent record, and num_clusters will be updated. | |
5070 | * If not, we will insert a new extent for it and move some xattrs in | |
5071 | * the last cluster into the new allocated one. | |
5072 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
5073 | * lose the benefits of hashing because we'll have to search large leaves. | |
5074 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
5075 | * if it's bigger). | |
5076 | * | |
5077 | * first_bh is the first block of the previous extent rec and header_bh | |
5078 | * indicates the bucket we will insert the new xattrs. They will be updated | |
5079 | * when the header_bh is moved into the new cluster. | |
5080 | */ | |
5081 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
5082 | struct buffer_head *root_bh, | |
ed29c0ca JB |
5083 | struct ocfs2_xattr_bucket *first, |
5084 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
5085 | u32 *num_clusters, |
5086 | u32 prev_cpos, | |
78f30c31 TM |
5087 | int *extend, |
5088 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5089 | { |
85db90e7 | 5090 | int ret; |
01225596 TM |
5091 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
5092 | u32 prev_clusters = *num_clusters; | |
5093 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
5094 | u64 block; | |
85db90e7 | 5095 | handle_t *handle = ctxt->handle; |
01225596 | 5096 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 5097 | struct ocfs2_extent_tree et; |
01225596 | 5098 | |
402b4183 TM |
5099 | trace_ocfs2_add_new_xattr_cluster_begin( |
5100 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
5101 | (unsigned long long)bucket_blkno(first), | |
5102 | prev_cpos, prev_clusters); | |
01225596 | 5103 | |
5e404e9e | 5104 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 5105 | |
0cf2f763 | 5106 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5107 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5108 | if (ret < 0) { |
5109 | mlog_errno(ret); | |
5110 | goto leave; | |
5111 | } | |
5112 | ||
1ed9b777 | 5113 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1, |
01225596 TM |
5114 | clusters_to_add, &bit_off, &num_bits); |
5115 | if (ret < 0) { | |
5116 | if (ret != -ENOSPC) | |
5117 | mlog_errno(ret); | |
5118 | goto leave; | |
5119 | } | |
5120 | ||
5121 | BUG_ON(num_bits > clusters_to_add); | |
5122 | ||
5123 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
402b4183 | 5124 | trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits); |
01225596 | 5125 | |
ed29c0ca | 5126 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
5127 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
5128 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
5129 | /* | |
5130 | * If this cluster is contiguous with the old one and | |
5131 | * adding this new cluster, we don't surpass the limit of | |
5132 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
5133 | * initialized and used like other buckets in the previous | |
5134 | * cluster. | |
5135 | * So add it as a contiguous one. The caller will handle | |
5136 | * its init process. | |
5137 | */ | |
5138 | v_start = prev_cpos + prev_clusters; | |
5139 | *num_clusters = prev_clusters + num_bits; | |
01225596 TM |
5140 | } else { |
5141 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
5142 | handle, | |
012ee910 JB |
5143 | first, |
5144 | target, | |
01225596 | 5145 | block, |
01225596 TM |
5146 | prev_clusters, |
5147 | &v_start, | |
5148 | extend); | |
5149 | if (ret) { | |
5150 | mlog_errno(ret); | |
5151 | goto leave; | |
5152 | } | |
5153 | } | |
5154 | ||
402b4183 TM |
5155 | trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block, |
5156 | v_start, num_bits); | |
cc79d8c1 | 5157 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 5158 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
5159 | if (ret < 0) { |
5160 | mlog_errno(ret); | |
5161 | goto leave; | |
5162 | } | |
5163 | ||
ec20cec7 | 5164 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5165 | |
5166 | leave: | |
01225596 TM |
5167 | return ret; |
5168 | } | |
5169 | ||
5170 | /* | |
92de109a JB |
5171 | * We are given an extent. 'first' is the bucket at the very front of |
5172 | * the extent. The extent has space for an additional bucket past | |
5173 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
5174 | * of the target bucket. We wish to shift every bucket past the target | |
5175 | * down one, filling in that additional space. When we get back to the | |
5176 | * target, we split the target between itself and the now-empty bucket | |
5177 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
5178 | */ |
5179 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 5180 | handle_t *handle, |
92de109a JB |
5181 | struct ocfs2_xattr_bucket *first, |
5182 | u64 target_blk, | |
01225596 TM |
5183 | u32 num_clusters) |
5184 | { | |
5185 | int ret, credits; | |
5186 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5187 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
5188 | u64 end_blk; |
5189 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 | 5190 | |
402b4183 TM |
5191 | trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk, |
5192 | (unsigned long long)bucket_blkno(first), | |
5193 | num_clusters, new_bucket); | |
01225596 | 5194 | |
92de109a JB |
5195 | /* The extent must have room for an additional bucket */ |
5196 | BUG_ON(new_bucket >= | |
5197 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 5198 | |
92de109a JB |
5199 | /* end_blk points to the last existing bucket */ |
5200 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
5201 | |
5202 | /* | |
92de109a JB |
5203 | * end_blk is the start of the last existing bucket. |
5204 | * Thus, (end_blk - target_blk) covers the target bucket and | |
5205 | * every bucket after it up to, but not including, the last | |
5206 | * existing bucket. Then we add the last existing bucket, the | |
5207 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 5208 | */ |
c901fb00 | 5209 | credits = (end_blk - target_blk) + (3 * blk_per_bucket); |
85db90e7 TM |
5210 | ret = ocfs2_extend_trans(handle, credits); |
5211 | if (ret) { | |
01225596 TM |
5212 | mlog_errno(ret); |
5213 | goto out; | |
5214 | } | |
5215 | ||
92de109a JB |
5216 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
5217 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
5218 | if (ret) { |
5219 | mlog_errno(ret); | |
85db90e7 | 5220 | goto out; |
01225596 TM |
5221 | } |
5222 | ||
92de109a | 5223 | while (end_blk != target_blk) { |
01225596 TM |
5224 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
5225 | end_blk + blk_per_bucket, 0); | |
5226 | if (ret) | |
85db90e7 | 5227 | goto out; |
01225596 TM |
5228 | end_blk -= blk_per_bucket; |
5229 | } | |
5230 | ||
92de109a JB |
5231 | /* Move half of the xattr in target_blkno to the next bucket. */ |
5232 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
5233 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 5234 | |
92de109a JB |
5235 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
5236 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 5237 | |
01225596 TM |
5238 | out: |
5239 | return ret; | |
5240 | } | |
5241 | ||
5242 | /* | |
91f2033f JB |
5243 | * Add new xattr bucket in an extent record and adjust the buckets |
5244 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
5245 | * bucket we want to insert into. | |
01225596 | 5246 | * |
91f2033f JB |
5247 | * In the easy case, we will move all the buckets after target down by |
5248 | * one. Half of target's xattrs will be moved to the next bucket. | |
5249 | * | |
5250 | * If current cluster is full, we'll allocate a new one. This may not | |
5251 | * be contiguous. The underlying calls will make sure that there is | |
5252 | * space for the insert, shifting buckets around if necessary. | |
5253 | * 'target' may be moved by those calls. | |
01225596 TM |
5254 | */ |
5255 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
5256 | struct buffer_head *xb_bh, | |
91f2033f | 5257 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 5258 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 5259 | { |
01225596 TM |
5260 | struct ocfs2_xattr_block *xb = |
5261 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5262 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
5263 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
5264 | u32 name_hash = |
5265 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 5266 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
5267 | int ret, num_buckets, extend = 1; |
5268 | u64 p_blkno; | |
5269 | u32 e_cpos, num_clusters; | |
92de109a | 5270 | /* The bucket at the front of the extent */ |
91f2033f | 5271 | struct ocfs2_xattr_bucket *first; |
01225596 | 5272 | |
402b4183 TM |
5273 | trace_ocfs2_add_new_xattr_bucket( |
5274 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 5275 | |
ed29c0ca | 5276 | /* The first bucket of the original extent */ |
92de109a | 5277 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 5278 | if (!first) { |
92de109a JB |
5279 | ret = -ENOMEM; |
5280 | mlog_errno(ret); | |
5281 | goto out; | |
5282 | } | |
5283 | ||
01225596 TM |
5284 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
5285 | &num_clusters, el); | |
5286 | if (ret) { | |
5287 | mlog_errno(ret); | |
5288 | goto out; | |
5289 | } | |
5290 | ||
ed29c0ca | 5291 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
5292 | if (ret) { |
5293 | mlog_errno(ret); | |
5294 | goto out; | |
5295 | } | |
5296 | ||
ed29c0ca JB |
5297 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
5298 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
5299 | /* | |
5300 | * This can move first+target if the target bucket moves | |
5301 | * to the new extent. | |
5302 | */ | |
01225596 TM |
5303 | ret = ocfs2_add_new_xattr_cluster(inode, |
5304 | xb_bh, | |
ed29c0ca JB |
5305 | first, |
5306 | target, | |
01225596 TM |
5307 | &num_clusters, |
5308 | e_cpos, | |
78f30c31 TM |
5309 | &extend, |
5310 | ctxt); | |
01225596 TM |
5311 | if (ret) { |
5312 | mlog_errno(ret); | |
5313 | goto out; | |
5314 | } | |
5315 | } | |
5316 | ||
92de109a | 5317 | if (extend) { |
01225596 | 5318 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 5319 | ctxt->handle, |
ed29c0ca JB |
5320 | first, |
5321 | bucket_blkno(target), | |
01225596 | 5322 | num_clusters); |
92de109a JB |
5323 | if (ret) |
5324 | mlog_errno(ret); | |
5325 | } | |
5326 | ||
01225596 | 5327 | out: |
92de109a | 5328 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 5329 | |
01225596 TM |
5330 | return ret; |
5331 | } | |
5332 | ||
01225596 TM |
5333 | /* |
5334 | * Truncate the specified xe_off entry in xattr bucket. | |
5335 | * bucket is indicated by header_bh and len is the new length. | |
5336 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
5337 | * | |
5338 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
5339 | */ | |
5340 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 5341 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 5342 | int xe_off, |
78f30c31 TM |
5343 | int len, |
5344 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5345 | { |
5346 | int ret, offset; | |
5347 | u64 value_blk; | |
01225596 | 5348 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 5349 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 5350 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
5351 | struct ocfs2_xattr_value_buf vb = { |
5352 | .vb_access = ocfs2_journal_access, | |
5353 | }; | |
01225596 TM |
5354 | |
5355 | xe = &xh->xh_entries[xe_off]; | |
5356 | ||
5357 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
5358 | ||
5359 | offset = le16_to_cpu(xe->xe_name_offset) + | |
5360 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5361 | ||
5362 | value_blk = offset / blocksize; | |
5363 | ||
5364 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
5365 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 5366 | |
b3e5d379 JB |
5367 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
5368 | BUG_ON(!vb.vb_bh); | |
01225596 | 5369 | |
b3e5d379 JB |
5370 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
5371 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 5372 | |
548b0f22 JB |
5373 | /* |
5374 | * From here on out we have to dirty the bucket. The generic | |
5375 | * value calls only modify one of the bucket's bhs, but we need | |
5376 | * to send the bucket at once. So if they error, they *could* have | |
5377 | * modified something. We have to assume they did, and dirty | |
5378 | * the whole bucket. This leaves us in a consistent state. | |
5379 | */ | |
402b4183 TM |
5380 | trace_ocfs2_xattr_bucket_value_truncate( |
5381 | (unsigned long long)bucket_blkno(bucket), xe_off, len); | |
b3e5d379 | 5382 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
5383 | if (ret) { |
5384 | mlog_errno(ret); | |
554e7f9e TM |
5385 | goto out; |
5386 | } | |
5387 | ||
5388 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5389 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5390 | if (ret) { | |
5391 | mlog_errno(ret); | |
5392 | goto out; | |
01225596 TM |
5393 | } |
5394 | ||
548b0f22 JB |
5395 | xe->xe_value_size = cpu_to_le64(len); |
5396 | ||
548b0f22 JB |
5397 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5398 | ||
01225596 | 5399 | out: |
01225596 TM |
5400 | return ret; |
5401 | } | |
5402 | ||
01225596 TM |
5403 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5404 | struct buffer_head *root_bh, | |
5405 | u64 blkno, | |
5406 | u32 cpos, | |
47bca495 TM |
5407 | u32 len, |
5408 | void *para) | |
01225596 TM |
5409 | { |
5410 | int ret; | |
5411 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5412 | struct inode *tl_inode = osb->osb_tl_inode; | |
5413 | handle_t *handle; | |
5414 | struct ocfs2_xattr_block *xb = | |
5415 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5416 | struct ocfs2_alloc_context *meta_ac = NULL; |
5417 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5418 | struct ocfs2_extent_tree et; |
5419 | ||
47bca495 | 5420 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5421 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5422 | if (ret) { |
5423 | mlog_errno(ret); | |
5424 | return ret; | |
5425 | } | |
5426 | ||
5e404e9e | 5427 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5428 | |
5429 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5430 | ||
402b4183 TM |
5431 | trace_ocfs2_rm_xattr_cluster( |
5432 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
5433 | (unsigned long long)blkno, cpos, len); | |
01225596 | 5434 | |
8cb471e8 JB |
5435 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5436 | len); | |
01225596 | 5437 | |
f99b9b7c | 5438 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5439 | if (ret) { |
5440 | mlog_errno(ret); | |
5441 | return ret; | |
5442 | } | |
5443 | ||
5444 | mutex_lock(&tl_inode->i_mutex); | |
5445 | ||
5446 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5447 | ret = __ocfs2_flush_truncate_log(osb); | |
5448 | if (ret < 0) { | |
5449 | mlog_errno(ret); | |
5450 | goto out; | |
5451 | } | |
5452 | } | |
5453 | ||
a90714c1 | 5454 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5455 | if (IS_ERR(handle)) { |
01225596 TM |
5456 | ret = -ENOMEM; |
5457 | mlog_errno(ret); | |
5458 | goto out; | |
5459 | } | |
5460 | ||
0cf2f763 | 5461 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5462 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5463 | if (ret) { |
5464 | mlog_errno(ret); | |
5465 | goto out_commit; | |
5466 | } | |
5467 | ||
dbdcf6a4 | 5468 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5469 | &dealloc); |
01225596 TM |
5470 | if (ret) { |
5471 | mlog_errno(ret); | |
5472 | goto out_commit; | |
5473 | } | |
5474 | ||
5475 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
ec20cec7 | 5476 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5477 | |
5478 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5479 | if (ret) | |
5480 | mlog_errno(ret); | |
6fdb702d | 5481 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
01225596 TM |
5482 | |
5483 | out_commit: | |
5484 | ocfs2_commit_trans(osb, handle); | |
5485 | out: | |
5486 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5487 | ||
5488 | mutex_unlock(&tl_inode->i_mutex); | |
5489 | ||
5490 | if (meta_ac) | |
5491 | ocfs2_free_alloc_context(meta_ac); | |
5492 | ||
5493 | ocfs2_run_deallocs(osb, &dealloc); | |
5494 | ||
5495 | return ret; | |
5496 | } | |
5497 | ||
80bcaf34 TM |
5498 | /* |
5499 | * check whether the xattr bucket is filled up with the same hash value. | |
5500 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5501 | * If we want to insert a xattr with different hash value, go ahead | |
5502 | * and ocfs2_divide_xattr_bucket will handle this. | |
5503 | */ | |
01225596 | 5504 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5505 | struct ocfs2_xattr_bucket *bucket, |
5506 | const char *name) | |
01225596 | 5507 | { |
3e632946 | 5508 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5509 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5510 | ||
5511 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5512 | return 0; | |
01225596 TM |
5513 | |
5514 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5515 | xh->xh_entries[0].xe_name_hash) { | |
5516 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5517 | "hash = %u\n", | |
9c7759aa | 5518 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5519 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5520 | return -ENOSPC; | |
5521 | } | |
5522 | ||
5523 | return 0; | |
5524 | } | |
5525 | ||
c5d95df5 JB |
5526 | /* |
5527 | * Try to set the entry in the current bucket. If we fail, the caller | |
5528 | * will handle getting us another bucket. | |
5529 | */ | |
5530 | static int ocfs2_xattr_set_entry_bucket(struct inode *inode, | |
5531 | struct ocfs2_xattr_info *xi, | |
5532 | struct ocfs2_xattr_search *xs, | |
5533 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5534 | { |
c5d95df5 JB |
5535 | int ret; |
5536 | struct ocfs2_xa_loc loc; | |
01225596 | 5537 | |
402b4183 | 5538 | trace_ocfs2_xattr_set_entry_bucket(xi->xi_name); |
01225596 | 5539 | |
c5d95df5 JB |
5540 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
5541 | xs->not_found ? NULL : xs->here); | |
5542 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
5543 | if (!ret) { | |
5544 | xs->here = loc.xl_entry; | |
5545 | goto out; | |
5546 | } | |
5547 | if (ret != -ENOSPC) { | |
5548 | mlog_errno(ret); | |
5549 | goto out; | |
5550 | } | |
01225596 | 5551 | |
c5d95df5 JB |
5552 | /* Ok, we need space. Let's try defragmenting the bucket. */ |
5553 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, | |
5554 | xs->bucket); | |
5555 | if (ret) { | |
5556 | mlog_errno(ret); | |
5557 | goto out; | |
5558 | } | |
01225596 | 5559 | |
c5d95df5 JB |
5560 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
5561 | if (!ret) { | |
5562 | xs->here = loc.xl_entry; | |
5563 | goto out; | |
01225596 | 5564 | } |
c5d95df5 JB |
5565 | if (ret != -ENOSPC) |
5566 | mlog_errno(ret); | |
01225596 | 5567 | |
01225596 | 5568 | |
c5d95df5 | 5569 | out: |
c5d95df5 JB |
5570 | return ret; |
5571 | } | |
01225596 | 5572 | |
c5d95df5 JB |
5573 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
5574 | struct ocfs2_xattr_info *xi, | |
5575 | struct ocfs2_xattr_search *xs, | |
5576 | struct ocfs2_xattr_set_ctxt *ctxt) | |
5577 | { | |
5578 | int ret; | |
01225596 | 5579 | |
402b4183 | 5580 | trace_ocfs2_xattr_set_entry_index_block(xi->xi_name); |
01225596 | 5581 | |
c5d95df5 JB |
5582 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
5583 | if (!ret) | |
5584 | goto out; | |
5585 | if (ret != -ENOSPC) { | |
5586 | mlog_errno(ret); | |
5587 | goto out; | |
5588 | } | |
01225596 | 5589 | |
c5d95df5 | 5590 | /* Ack, need more space. Let's try to get another bucket! */ |
01225596 | 5591 | |
c5d95df5 JB |
5592 | /* |
5593 | * We do not allow for overlapping ranges between buckets. And | |
5594 | * the maximum number of collisions we will allow for then is | |
5595 | * one bucket's worth, so check it here whether we need to | |
5596 | * add a new bucket for the insert. | |
5597 | */ | |
5598 | ret = ocfs2_check_xattr_bucket_collision(inode, | |
91f2033f | 5599 | xs->bucket, |
c5d95df5 JB |
5600 | xi->xi_name); |
5601 | if (ret) { | |
5602 | mlog_errno(ret); | |
5603 | goto out; | |
5604 | } | |
01225596 | 5605 | |
c5d95df5 JB |
5606 | ret = ocfs2_add_new_xattr_bucket(inode, |
5607 | xs->xattr_bh, | |
5608 | xs->bucket, | |
5609 | ctxt); | |
5610 | if (ret) { | |
5611 | mlog_errno(ret); | |
5612 | goto out; | |
01225596 TM |
5613 | } |
5614 | ||
c5d95df5 JB |
5615 | /* |
5616 | * ocfs2_add_new_xattr_bucket() will have updated | |
5617 | * xs->bucket if it moved, but it will not have updated | |
5618 | * any of the other search fields. Thus, we drop it and | |
5619 | * re-search. Everything should be cached, so it'll be | |
5620 | * quick. | |
5621 | */ | |
5622 | ocfs2_xattr_bucket_relse(xs->bucket); | |
5623 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
5624 | xi->xi_name_index, | |
5625 | xi->xi_name, xs); | |
5626 | if (ret && ret != -ENODATA) | |
5627 | goto out; | |
5628 | xs->not_found = ret; | |
5629 | ||
5630 | /* Ok, we have a new bucket, let's try again */ | |
5631 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); | |
5632 | if (ret && (ret != -ENOSPC)) | |
5633 | mlog_errno(ret); | |
5634 | ||
01225596 | 5635 | out: |
01225596 TM |
5636 | return ret; |
5637 | } | |
a3944256 TM |
5638 | |
5639 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5640 | struct ocfs2_xattr_bucket *bucket, | |
5641 | void *para) | |
5642 | { | |
ce9c5a54 | 5643 | int ret = 0, ref_credits; |
3e632946 | 5644 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5645 | u16 i; |
5646 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5647 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5648 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5649 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5650 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5651 | struct ocfs2_xattr_value_root *xv; |
5652 | struct ocfs2_rm_xattr_bucket_para *args = | |
5653 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5654 | |
5655 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5656 | |
5657 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5658 | xe = &xh->xh_entries[i]; | |
5659 | if (ocfs2_xattr_is_local(xe)) | |
5660 | continue; | |
5661 | ||
ce9c5a54 TM |
5662 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5663 | i, &xv, NULL); | |
023d4ea3 JQ |
5664 | if (ret) { |
5665 | mlog_errno(ret); | |
5666 | break; | |
5667 | } | |
ce9c5a54 TM |
5668 | |
5669 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5670 | args->ref_ci, | |
5671 | args->ref_root_bh, | |
5672 | &ctxt.meta_ac, | |
5673 | &ref_credits); | |
5674 | ||
5675 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5676 | if (IS_ERR(ctxt.handle)) { |
5677 | ret = PTR_ERR(ctxt.handle); | |
5678 | mlog_errno(ret); | |
5679 | break; | |
5680 | } | |
5681 | ||
548b0f22 | 5682 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5683 | i, 0, &ctxt); |
88c3b062 TM |
5684 | |
5685 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5686 | if (ctxt.meta_ac) { |
5687 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5688 | ctxt.meta_ac = NULL; | |
5689 | } | |
a3944256 TM |
5690 | if (ret) { |
5691 | mlog_errno(ret); | |
5692 | break; | |
5693 | } | |
5694 | } | |
5695 | ||
ce9c5a54 TM |
5696 | if (ctxt.meta_ac) |
5697 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5698 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5699 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5700 | return ret; |
5701 | } | |
5702 | ||
492a8a33 TM |
5703 | /* |
5704 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5705 | * or change the extent record flag), we need to recalculate | |
5706 | * the metaecc for the whole bucket. So it is done here. | |
5707 | * | |
5708 | * Note: | |
5709 | * We have to give the extra credits for the caller. | |
5710 | */ | |
5711 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5712 | handle_t *handle, | |
5713 | void *para) | |
5714 | { | |
5715 | int ret; | |
5716 | struct ocfs2_xattr_bucket *bucket = | |
5717 | (struct ocfs2_xattr_bucket *)para; | |
5718 | ||
5719 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5720 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5721 | if (ret) { | |
5722 | mlog_errno(ret); | |
5723 | return ret; | |
5724 | } | |
5725 | ||
5726 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5727 | ||
5728 | return 0; | |
5729 | } | |
5730 | ||
5731 | /* | |
5732 | * Special action we need if the xattr value is refcounted. | |
5733 | * | |
5734 | * 1. If the xattr is refcounted, lock the tree. | |
5735 | * 2. CoW the xattr if we are setting the new value and the value | |
5736 | * will be stored outside. | |
5737 | * 3. In other case, decrease_refcount will work for us, so just | |
5738 | * lock the refcount tree, calculate the meta and credits is OK. | |
5739 | * | |
5740 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5741 | * currently CoW is a completed transaction, while this function | |
5742 | * will also lock the allocators and let us deadlock. So we will | |
5743 | * CoW the whole xattr value. | |
5744 | */ | |
5745 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5746 | struct ocfs2_dinode *di, | |
5747 | struct ocfs2_xattr_info *xi, | |
5748 | struct ocfs2_xattr_search *xis, | |
5749 | struct ocfs2_xattr_search *xbs, | |
5750 | struct ocfs2_refcount_tree **ref_tree, | |
5751 | int *meta_add, | |
5752 | int *credits) | |
5753 | { | |
5754 | int ret = 0; | |
5755 | struct ocfs2_xattr_block *xb; | |
5756 | struct ocfs2_xattr_entry *xe; | |
5757 | char *base; | |
5758 | u32 p_cluster, num_clusters; | |
5759 | unsigned int ext_flags; | |
5760 | int name_offset, name_len; | |
5761 | struct ocfs2_xattr_value_buf vb; | |
5762 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5763 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5764 | struct ocfs2_post_refcount refcount; | |
5765 | struct ocfs2_post_refcount *p = NULL; | |
5766 | struct buffer_head *ref_root_bh = NULL; | |
5767 | ||
5768 | if (!xis->not_found) { | |
5769 | xe = xis->here; | |
5770 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5771 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5772 | base = xis->base; | |
5773 | vb.vb_bh = xis->inode_bh; | |
5774 | vb.vb_access = ocfs2_journal_access_di; | |
5775 | } else { | |
5776 | int i, block_off = 0; | |
5777 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5778 | xe = xbs->here; | |
5779 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5780 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5781 | i = xbs->here - xbs->header->xh_entries; | |
5782 | ||
5783 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5784 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5785 | bucket_xh(xbs->bucket), |
5786 | i, &block_off, | |
5787 | &name_offset); | |
5788 | if (ret) { | |
5789 | mlog_errno(ret); | |
5790 | goto out; | |
5791 | } | |
5792 | base = bucket_block(xbs->bucket, block_off); | |
5793 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5794 | vb.vb_access = ocfs2_journal_access; | |
5795 | ||
5796 | if (ocfs2_meta_ecc(osb)) { | |
5797 | /*create parameters for ocfs2_post_refcount. */ | |
5798 | bucket = xbs->bucket; | |
5799 | refcount.credits = bucket->bu_blocks; | |
5800 | refcount.para = bucket; | |
5801 | refcount.func = | |
5802 | ocfs2_xattr_bucket_post_refcount; | |
5803 | p = &refcount; | |
5804 | } | |
5805 | } else { | |
5806 | base = xbs->base; | |
5807 | vb.vb_bh = xbs->xattr_bh; | |
5808 | vb.vb_access = ocfs2_journal_access_xb; | |
5809 | } | |
5810 | } | |
5811 | ||
5812 | if (ocfs2_xattr_is_local(xe)) | |
5813 | goto out; | |
5814 | ||
5815 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5816 | (base + name_offset + name_len); | |
5817 | ||
5818 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5819 | &num_clusters, &vb.vb_xv->xr_list, | |
5820 | &ext_flags); | |
5821 | if (ret) { | |
5822 | mlog_errno(ret); | |
5823 | goto out; | |
5824 | } | |
5825 | ||
5826 | /* | |
5827 | * We just need to check the 1st extent record, since we always | |
5828 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5829 | * some REFCOUNT extent recs after the 1st one. | |
5830 | */ | |
5831 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5832 | goto out; | |
5833 | ||
5834 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5835 | 1, ref_tree, &ref_root_bh); | |
5836 | if (ret) { | |
5837 | mlog_errno(ret); | |
5838 | goto out; | |
5839 | } | |
5840 | ||
5841 | /* | |
5842 | * If we are deleting the xattr or the new size will be stored inside, | |
5843 | * cool, leave it there, the xattr truncate process will remove them | |
5844 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5845 | * And the worse case is that every cluster truncate will split the | |
5846 | * refcount tree, and make the original extent become 3. So we will need | |
5847 | * 2 * cluster more extent recs at most. | |
5848 | */ | |
6b240ff6 | 5849 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
492a8a33 TM |
5850 | |
5851 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5852 | &(*ref_tree)->rf_ci, | |
5853 | ref_root_bh, vb.vb_xv, | |
5854 | meta_add, credits); | |
5855 | if (ret) | |
5856 | mlog_errno(ret); | |
5857 | goto out; | |
5858 | } | |
5859 | ||
5860 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5861 | *ref_tree, ref_root_bh, 0, | |
5862 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5863 | if (ret) | |
5864 | mlog_errno(ret); | |
5865 | ||
5866 | out: | |
5867 | brelse(ref_root_bh); | |
5868 | return ret; | |
5869 | } | |
5870 | ||
0129241e TM |
5871 | /* |
5872 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5873 | * The physical clusters will be added to refcount tree. | |
5874 | */ | |
5875 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5876 | struct ocfs2_xattr_value_root *xv, | |
5877 | struct ocfs2_extent_tree *value_et, | |
5878 | struct ocfs2_caching_info *ref_ci, | |
5879 | struct buffer_head *ref_root_bh, | |
5880 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5881 | struct ocfs2_post_refcount *refcount) | |
5882 | { | |
5883 | int ret = 0; | |
5884 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5885 | u32 cpos, p_cluster, num_clusters; | |
5886 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5887 | unsigned int ext_flags; | |
5888 | ||
5889 | cpos = 0; | |
5890 | while (cpos < clusters) { | |
5891 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5892 | &num_clusters, el, &ext_flags); | |
17caf955 JQ |
5893 | if (ret) { |
5894 | mlog_errno(ret); | |
5895 | break; | |
5896 | } | |
0129241e TM |
5897 | |
5898 | cpos += num_clusters; | |
5899 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5900 | continue; | |
5901 | ||
5902 | BUG_ON(!p_cluster); | |
5903 | ||
5904 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5905 | ref_ci, ref_root_bh, | |
5906 | cpos - num_clusters, | |
5907 | p_cluster, num_clusters, | |
5908 | dealloc, refcount); | |
5909 | if (ret) { | |
5910 | mlog_errno(ret); | |
5911 | break; | |
5912 | } | |
5913 | } | |
5914 | ||
5915 | return ret; | |
5916 | } | |
5917 | ||
5918 | /* | |
5919 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5920 | * have value stored outside. | |
5921 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5922 | */ | |
5923 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5924 | struct ocfs2_xattr_value_buf *vb, | |
5925 | struct ocfs2_xattr_header *header, | |
5926 | struct ocfs2_caching_info *ref_ci, | |
5927 | struct buffer_head *ref_root_bh, | |
5928 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5929 | { | |
5930 | ||
5931 | struct ocfs2_xattr_entry *xe; | |
5932 | struct ocfs2_xattr_value_root *xv; | |
5933 | struct ocfs2_extent_tree et; | |
5934 | int i, ret = 0; | |
5935 | ||
5936 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5937 | xe = &header->xh_entries[i]; | |
5938 | ||
5939 | if (ocfs2_xattr_is_local(xe)) | |
5940 | continue; | |
5941 | ||
5942 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5943 | le16_to_cpu(xe->xe_name_offset) + | |
5944 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5945 | ||
5946 | vb->vb_xv = xv; | |
5947 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5948 | ||
5949 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5950 | ref_ci, ref_root_bh, | |
5951 | dealloc, NULL); | |
5952 | if (ret) { | |
5953 | mlog_errno(ret); | |
5954 | break; | |
5955 | } | |
5956 | } | |
5957 | ||
5958 | return ret; | |
5959 | } | |
5960 | ||
5961 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5962 | struct buffer_head *fe_bh, | |
5963 | struct ocfs2_caching_info *ref_ci, | |
5964 | struct buffer_head *ref_root_bh, | |
5965 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5966 | { | |
5967 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5968 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5969 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5970 | le16_to_cpu(di->i_xattr_inline_size)); | |
5971 | struct ocfs2_xattr_value_buf vb = { | |
5972 | .vb_bh = fe_bh, | |
5973 | .vb_access = ocfs2_journal_access_di, | |
5974 | }; | |
5975 | ||
5976 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5977 | ref_ci, ref_root_bh, dealloc); | |
5978 | } | |
5979 | ||
5980 | struct ocfs2_xattr_tree_value_refcount_para { | |
5981 | struct ocfs2_caching_info *ref_ci; | |
5982 | struct buffer_head *ref_root_bh; | |
5983 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
5984 | }; | |
5985 | ||
5986 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
5987 | struct ocfs2_xattr_bucket *bucket, | |
5988 | int offset, | |
5989 | struct ocfs2_xattr_value_root **xv, | |
5990 | struct buffer_head **bh) | |
5991 | { | |
5992 | int ret, block_off, name_offset; | |
5993 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
5994 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
5995 | void *base; | |
5996 | ||
5997 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
5998 | bucket_xh(bucket), | |
5999 | offset, | |
6000 | &block_off, | |
6001 | &name_offset); | |
6002 | if (ret) { | |
6003 | mlog_errno(ret); | |
6004 | goto out; | |
6005 | } | |
6006 | ||
6007 | base = bucket_block(bucket, block_off); | |
6008 | ||
6009 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
6010 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6011 | ||
6012 | if (bh) | |
6013 | *bh = bucket->bu_bhs[block_off]; | |
6014 | out: | |
6015 | return ret; | |
6016 | } | |
6017 | ||
6018 | /* | |
6019 | * For a given xattr bucket, refcount all the entries which | |
6020 | * have value stored outside. | |
6021 | */ | |
6022 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
6023 | struct ocfs2_xattr_bucket *bucket, | |
6024 | void *para) | |
6025 | { | |
6026 | int i, ret = 0; | |
6027 | struct ocfs2_extent_tree et; | |
6028 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
6029 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
6030 | struct ocfs2_xattr_header *xh = | |
6031 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6032 | struct ocfs2_xattr_entry *xe; | |
6033 | struct ocfs2_xattr_value_buf vb = { | |
6034 | .vb_access = ocfs2_journal_access, | |
6035 | }; | |
6036 | struct ocfs2_post_refcount refcount = { | |
6037 | .credits = bucket->bu_blocks, | |
6038 | .para = bucket, | |
6039 | .func = ocfs2_xattr_bucket_post_refcount, | |
6040 | }; | |
6041 | struct ocfs2_post_refcount *p = NULL; | |
6042 | ||
6043 | /* We only need post_refcount if we support metaecc. */ | |
6044 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
6045 | p = &refcount; | |
6046 | ||
402b4183 TM |
6047 | trace_ocfs2_xattr_bucket_value_refcount( |
6048 | (unsigned long long)bucket_blkno(bucket), | |
6049 | le16_to_cpu(xh->xh_count)); | |
0129241e TM |
6050 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
6051 | xe = &xh->xh_entries[i]; | |
6052 | ||
6053 | if (ocfs2_xattr_is_local(xe)) | |
6054 | continue; | |
6055 | ||
6056 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
6057 | &vb.vb_xv, &vb.vb_bh); | |
6058 | if (ret) { | |
6059 | mlog_errno(ret); | |
6060 | break; | |
6061 | } | |
6062 | ||
6063 | ocfs2_init_xattr_value_extent_tree(&et, | |
6064 | INODE_CACHE(inode), &vb); | |
6065 | ||
6066 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
6067 | &et, ref->ref_ci, | |
6068 | ref->ref_root_bh, | |
6069 | ref->dealloc, p); | |
6070 | if (ret) { | |
6071 | mlog_errno(ret); | |
6072 | break; | |
6073 | } | |
6074 | } | |
6075 | ||
6076 | return ret; | |
6077 | ||
6078 | } | |
6079 | ||
6080 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
6081 | struct buffer_head *root_bh, | |
6082 | u64 blkno, u32 cpos, u32 len, void *para) | |
6083 | { | |
6084 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
6085 | ocfs2_xattr_bucket_value_refcount, | |
6086 | para); | |
6087 | } | |
6088 | ||
6089 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
6090 | struct buffer_head *blk_bh, | |
6091 | struct ocfs2_caching_info *ref_ci, | |
6092 | struct buffer_head *ref_root_bh, | |
6093 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6094 | { | |
6095 | int ret = 0; | |
6096 | struct ocfs2_xattr_block *xb = | |
6097 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6098 | ||
6099 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
6100 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
6101 | struct ocfs2_xattr_value_buf vb = { | |
6102 | .vb_bh = blk_bh, | |
6103 | .vb_access = ocfs2_journal_access_xb, | |
6104 | }; | |
6105 | ||
6106 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6107 | ref_ci, ref_root_bh, | |
6108 | dealloc); | |
6109 | } else { | |
6110 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
6111 | .ref_ci = ref_ci, | |
6112 | .ref_root_bh = ref_root_bh, | |
6113 | .dealloc = dealloc, | |
6114 | }; | |
6115 | ||
6116 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
6117 | ocfs2_refcount_xattr_tree_rec, | |
6118 | ¶); | |
6119 | } | |
6120 | ||
6121 | return ret; | |
6122 | } | |
6123 | ||
6124 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
6125 | struct buffer_head *fe_bh, | |
6126 | struct ocfs2_caching_info *ref_ci, | |
6127 | struct buffer_head *ref_root_bh, | |
6128 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6129 | { | |
6130 | int ret = 0; | |
6131 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
6132 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6133 | struct buffer_head *blk_bh = NULL; | |
6134 | ||
6135 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6136 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
6137 | ref_ci, ref_root_bh, | |
6138 | dealloc); | |
6139 | if (ret) { | |
6140 | mlog_errno(ret); | |
6141 | goto out; | |
6142 | } | |
6143 | } | |
6144 | ||
6145 | if (!di->i_xattr_loc) | |
6146 | goto out; | |
6147 | ||
6148 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
6149 | &blk_bh); | |
6150 | if (ret < 0) { | |
6151 | mlog_errno(ret); | |
6152 | goto out; | |
6153 | } | |
6154 | ||
6155 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
6156 | ref_root_bh, dealloc); | |
6157 | if (ret) | |
6158 | mlog_errno(ret); | |
6159 | ||
6160 | brelse(blk_bh); | |
6161 | out: | |
6162 | ||
6163 | return ret; | |
6164 | } | |
6165 | ||
0fe9b66c | 6166 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6167 | /* |
6168 | * Store the information we need in xattr reflink. | |
6169 | * old_bh and new_bh are inode bh for the old and new inode. | |
6170 | */ | |
6171 | struct ocfs2_xattr_reflink { | |
6172 | struct inode *old_inode; | |
6173 | struct inode *new_inode; | |
6174 | struct buffer_head *old_bh; | |
6175 | struct buffer_head *new_bh; | |
6176 | struct ocfs2_caching_info *ref_ci; | |
6177 | struct buffer_head *ref_root_bh; | |
6178 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6179 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6180 | }; |
6181 | ||
6182 | /* | |
6183 | * Given a xattr header and xe offset, | |
6184 | * return the proper xv and the corresponding bh. | |
6185 | * xattr in inode, block and xattr tree have different implementaions. | |
6186 | */ | |
6187 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6188 | struct buffer_head *bh, | |
6189 | struct ocfs2_xattr_header *xh, | |
6190 | int offset, | |
6191 | struct ocfs2_xattr_value_root **xv, | |
6192 | struct buffer_head **ret_bh, | |
6193 | void *para); | |
6194 | ||
6195 | /* | |
6196 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6197 | * credits we need if we create them from the scratch. | |
6198 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6199 | */ | |
6200 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6201 | struct buffer_head *bh, | |
6202 | struct ocfs2_xattr_header *xh, | |
6203 | int *metas, int *credits, | |
6204 | int *num_recs, | |
6205 | get_xattr_value_root *func, | |
6206 | void *para) | |
6207 | { | |
6208 | int i, ret = 0; | |
6209 | struct ocfs2_xattr_value_root *xv; | |
6210 | struct ocfs2_xattr_entry *xe; | |
6211 | ||
6212 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6213 | xe = &xh->xh_entries[i]; | |
6214 | if (ocfs2_xattr_is_local(xe)) | |
6215 | continue; | |
6216 | ||
6217 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6218 | if (ret) { | |
6219 | mlog_errno(ret); | |
6220 | break; | |
6221 | } | |
6222 | ||
6223 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6224 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6225 | ||
6226 | *credits += ocfs2_calc_extend_credits(sb, | |
06f9da6e | 6227 | &def_xv.xv.xr_list); |
2999d12f TM |
6228 | |
6229 | /* | |
6230 | * If the value is a tree with depth > 1, We don't go deep | |
6231 | * to the extent block, so just calculate a maximum record num. | |
6232 | */ | |
6233 | if (!xv->xr_list.l_tree_depth) | |
8ff6af88 | 6234 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
2999d12f TM |
6235 | else |
6236 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6237 | XATTR_SIZE_MAX); | |
6238 | } | |
6239 | ||
6240 | return ret; | |
6241 | } | |
6242 | ||
6243 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6244 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6245 | struct buffer_head *bh, | |
6246 | struct ocfs2_xattr_header *xh, | |
6247 | int offset, | |
6248 | struct ocfs2_xattr_value_root **xv, | |
6249 | struct buffer_head **ret_bh, | |
6250 | void *para) | |
6251 | { | |
6252 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6253 | ||
6254 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6255 | le16_to_cpu(xe->xe_name_offset) + | |
6256 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6257 | ||
6258 | if (ret_bh) | |
6259 | *ret_bh = bh; | |
6260 | ||
6261 | return 0; | |
6262 | } | |
6263 | ||
6264 | /* | |
6265 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6266 | * It is only used for inline xattr and xattr block. | |
6267 | */ | |
6268 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6269 | struct ocfs2_xattr_header *xh, | |
6270 | struct buffer_head *ref_root_bh, | |
6271 | int *credits, | |
6272 | struct ocfs2_alloc_context **meta_ac) | |
6273 | { | |
6274 | int ret, meta_add = 0, num_recs = 0; | |
6275 | struct ocfs2_refcount_block *rb = | |
6276 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6277 | ||
6278 | *credits = 0; | |
6279 | ||
6280 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6281 | &meta_add, credits, &num_recs, | |
6282 | ocfs2_get_xattr_value_root, | |
6283 | NULL); | |
6284 | if (ret) { | |
6285 | mlog_errno(ret); | |
6286 | goto out; | |
6287 | } | |
6288 | ||
6289 | /* | |
6290 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6291 | * an approximate number we need for refcount tree change. | |
6292 | * Sometimes we need to split the tree, and after split, half recs | |
6293 | * will be moved to the new block, and a new block can only provide | |
6294 | * half number of recs. So we multiple new blocks by 2. | |
6295 | */ | |
6296 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6297 | meta_add += num_recs; | |
6298 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6299 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6300 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6301 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6302 | else | |
6303 | *credits += 1; | |
6304 | ||
6305 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6306 | if (ret) | |
6307 | mlog_errno(ret); | |
6308 | ||
6309 | out: | |
6310 | return ret; | |
6311 | } | |
6312 | ||
6313 | /* | |
6314 | * Given a xattr header, reflink all the xattrs in this container. | |
6315 | * It can be used for inode, block and bucket. | |
6316 | * | |
6317 | * NOTE: | |
6318 | * Before we call this function, the caller has memcpy the xattr in | |
6319 | * old_xh to the new_xh. | |
0fe9b66c TM |
6320 | * |
6321 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6322 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6323 | */ |
6324 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6325 | struct ocfs2_xattr_reflink *args, | |
6326 | struct buffer_head *old_bh, | |
6327 | struct ocfs2_xattr_header *xh, | |
6328 | struct buffer_head *new_bh, | |
6329 | struct ocfs2_xattr_header *new_xh, | |
6330 | struct ocfs2_xattr_value_buf *vb, | |
6331 | struct ocfs2_alloc_context *meta_ac, | |
6332 | get_xattr_value_root *func, | |
6333 | void *para) | |
6334 | { | |
0fe9b66c | 6335 | int ret = 0, i, j; |
2999d12f TM |
6336 | struct super_block *sb = args->old_inode->i_sb; |
6337 | struct buffer_head *value_bh; | |
0fe9b66c | 6338 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6339 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6340 | struct ocfs2_extent_tree data_et; | |
6341 | u32 clusters, cpos, p_cluster, num_clusters; | |
6342 | unsigned int ext_flags = 0; | |
6343 | ||
402b4183 TM |
6344 | trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr, |
6345 | le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6346 | |
6347 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6348 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6349 | xe = &xh->xh_entries[i]; |
6350 | ||
0fe9b66c TM |
6351 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6352 | xe = &new_xh->xh_entries[j]; | |
6353 | ||
6354 | le16_add_cpu(&new_xh->xh_count, -1); | |
6355 | if (new_xh->xh_count) { | |
6356 | memmove(xe, xe + 1, | |
6357 | (void *)last - (void *)xe); | |
6358 | memset(last, 0, | |
6359 | sizeof(struct ocfs2_xattr_entry)); | |
6360 | } | |
6361 | ||
6362 | /* | |
6363 | * We don't want j to increase in the next round since | |
6364 | * it is already moved ahead. | |
6365 | */ | |
6366 | j--; | |
6367 | continue; | |
6368 | } | |
6369 | ||
2999d12f TM |
6370 | if (ocfs2_xattr_is_local(xe)) |
6371 | continue; | |
6372 | ||
6373 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6374 | if (ret) { | |
6375 | mlog_errno(ret); | |
6376 | break; | |
6377 | } | |
6378 | ||
0fe9b66c | 6379 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6380 | if (ret) { |
6381 | mlog_errno(ret); | |
6382 | break; | |
6383 | } | |
6384 | ||
6385 | /* | |
6386 | * For the xattr which has l_tree_depth = 0, all the extent | |
6387 | * recs have already be copied to the new xh with the | |
6388 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6389 | * increase the refount count int the refcount tree. | |
6390 | * | |
6391 | * For the xattr which has l_tree_depth > 0, we need | |
6392 | * to initialize it to the empty default value root, | |
6393 | * and then insert the extents one by one. | |
6394 | */ | |
6395 | if (xv->xr_list.l_tree_depth) { | |
6396 | memcpy(new_xv, &def_xv, sizeof(def_xv)); | |
6397 | vb->vb_xv = new_xv; | |
6398 | vb->vb_bh = value_bh; | |
6399 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6400 | INODE_CACHE(args->new_inode), vb); | |
6401 | } | |
6402 | ||
6403 | clusters = le32_to_cpu(xv->xr_clusters); | |
6404 | cpos = 0; | |
6405 | while (cpos < clusters) { | |
6406 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6407 | cpos, | |
6408 | &p_cluster, | |
6409 | &num_clusters, | |
6410 | &xv->xr_list, | |
6411 | &ext_flags); | |
6412 | if (ret) { | |
6413 | mlog_errno(ret); | |
6414 | goto out; | |
6415 | } | |
6416 | ||
6417 | BUG_ON(!p_cluster); | |
6418 | ||
6419 | if (xv->xr_list.l_tree_depth) { | |
6420 | ret = ocfs2_insert_extent(handle, | |
6421 | &data_et, cpos, | |
6422 | ocfs2_clusters_to_blocks( | |
6423 | args->old_inode->i_sb, | |
6424 | p_cluster), | |
6425 | num_clusters, ext_flags, | |
6426 | meta_ac); | |
6427 | if (ret) { | |
6428 | mlog_errno(ret); | |
6429 | goto out; | |
6430 | } | |
6431 | } | |
6432 | ||
6433 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6434 | args->ref_root_bh, | |
6435 | p_cluster, num_clusters, | |
6436 | meta_ac, args->dealloc); | |
6437 | if (ret) { | |
6438 | mlog_errno(ret); | |
6439 | goto out; | |
6440 | } | |
6441 | ||
6442 | cpos += num_clusters; | |
6443 | } | |
6444 | } | |
6445 | ||
6446 | out: | |
6447 | return ret; | |
6448 | } | |
6449 | ||
6450 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6451 | { | |
6452 | int ret = 0, credits = 0; | |
6453 | handle_t *handle; | |
6454 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6455 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6456 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6457 | int header_off = osb->sb->s_blocksize - inline_size; | |
6458 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6459 | (args->old_bh->b_data + header_off); | |
6460 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6461 | (args->new_bh->b_data + header_off); | |
6462 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6463 | struct ocfs2_inode_info *new_oi; | |
6464 | struct ocfs2_dinode *new_di; | |
6465 | struct ocfs2_xattr_value_buf vb = { | |
6466 | .vb_bh = args->new_bh, | |
6467 | .vb_access = ocfs2_journal_access_di, | |
6468 | }; | |
6469 | ||
6470 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6471 | &credits, &meta_ac); | |
6472 | if (ret) { | |
6473 | mlog_errno(ret); | |
6474 | goto out; | |
6475 | } | |
6476 | ||
6477 | handle = ocfs2_start_trans(osb, credits); | |
6478 | if (IS_ERR(handle)) { | |
6479 | ret = PTR_ERR(handle); | |
6480 | mlog_errno(ret); | |
6481 | goto out; | |
6482 | } | |
6483 | ||
6484 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6485 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6486 | if (ret) { | |
6487 | mlog_errno(ret); | |
6488 | goto out_commit; | |
6489 | } | |
6490 | ||
6491 | memcpy(args->new_bh->b_data + header_off, | |
6492 | args->old_bh->b_data + header_off, inline_size); | |
6493 | ||
6494 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6495 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6496 | ||
6497 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6498 | args->new_bh, new_xh, &vb, meta_ac, | |
6499 | ocfs2_get_xattr_value_root, NULL); | |
6500 | if (ret) { | |
6501 | mlog_errno(ret); | |
6502 | goto out_commit; | |
6503 | } | |
6504 | ||
6505 | new_oi = OCFS2_I(args->new_inode); | |
ef962df0 JB |
6506 | /* |
6507 | * Adjust extent record count to reserve space for extended attribute. | |
6508 | * Inline data count had been adjusted in ocfs2_duplicate_inline_data(). | |
6509 | */ | |
6510 | if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) && | |
6511 | !(ocfs2_inode_is_fast_symlink(args->new_inode))) { | |
6512 | struct ocfs2_extent_list *el = &new_di->id2.i_list; | |
6513 | le16_add_cpu(&el->l_count, -(inline_size / | |
6514 | sizeof(struct ocfs2_extent_rec))); | |
6515 | } | |
2999d12f TM |
6516 | spin_lock(&new_oi->ip_lock); |
6517 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6518 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6519 | spin_unlock(&new_oi->ip_lock); | |
6520 | ||
6521 | ocfs2_journal_dirty(handle, args->new_bh); | |
6522 | ||
6523 | out_commit: | |
6524 | ocfs2_commit_trans(osb, handle); | |
6525 | ||
6526 | out: | |
6527 | if (meta_ac) | |
6528 | ocfs2_free_alloc_context(meta_ac); | |
6529 | return ret; | |
6530 | } | |
6531 | ||
6532 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6533 | struct buffer_head *fe_bh, | |
6534 | struct buffer_head **ret_bh, | |
6535 | int indexed) | |
6536 | { | |
6537 | int ret; | |
2999d12f | 6538 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
b2317968 | 6539 | struct ocfs2_xattr_set_ctxt ctxt; |
2999d12f | 6540 | |
b2317968 TM |
6541 | memset(&ctxt, 0, sizeof(ctxt)); |
6542 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac); | |
2999d12f TM |
6543 | if (ret < 0) { |
6544 | mlog_errno(ret); | |
6545 | return ret; | |
6546 | } | |
6547 | ||
d3981544 JB |
6548 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); |
6549 | if (IS_ERR(ctxt.handle)) { | |
6550 | ret = PTR_ERR(ctxt.handle); | |
2999d12f TM |
6551 | mlog_errno(ret); |
6552 | goto out; | |
6553 | } | |
6554 | ||
402b4183 TM |
6555 | trace_ocfs2_create_empty_xattr_block( |
6556 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
d3981544 JB |
6557 | ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed, |
6558 | ret_bh); | |
2999d12f TM |
6559 | if (ret) |
6560 | mlog_errno(ret); | |
6561 | ||
d3981544 | 6562 | ocfs2_commit_trans(osb, ctxt.handle); |
2999d12f | 6563 | out: |
b2317968 | 6564 | ocfs2_free_alloc_context(ctxt.meta_ac); |
2999d12f TM |
6565 | return ret; |
6566 | } | |
6567 | ||
6568 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6569 | struct buffer_head *blk_bh, | |
6570 | struct buffer_head *new_blk_bh) | |
6571 | { | |
6572 | int ret = 0, credits = 0; | |
6573 | handle_t *handle; | |
6574 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6575 | struct ocfs2_dinode *new_di; | |
6576 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6577 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6578 | struct ocfs2_xattr_block *xb = | |
6579 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6580 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6581 | struct ocfs2_xattr_block *new_xb = | |
6582 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6583 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6584 | struct ocfs2_alloc_context *meta_ac; | |
6585 | struct ocfs2_xattr_value_buf vb = { | |
6586 | .vb_bh = new_blk_bh, | |
6587 | .vb_access = ocfs2_journal_access_xb, | |
6588 | }; | |
6589 | ||
6590 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6591 | &credits, &meta_ac); | |
6592 | if (ret) { | |
6593 | mlog_errno(ret); | |
6594 | return ret; | |
6595 | } | |
6596 | ||
6597 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6598 | handle = ocfs2_start_trans(osb, credits + 1); | |
6599 | if (IS_ERR(handle)) { | |
6600 | ret = PTR_ERR(handle); | |
6601 | mlog_errno(ret); | |
6602 | goto out; | |
6603 | } | |
6604 | ||
6605 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6606 | ret = ocfs2_journal_access_di(handle, | |
6607 | INODE_CACHE(args->new_inode), | |
6608 | args->new_bh, | |
6609 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6610 | if (ret) { | |
6611 | mlog_errno(ret); | |
6612 | goto out_commit; | |
6613 | } | |
6614 | } | |
6615 | ||
6616 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6617 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6618 | if (ret) { | |
6619 | mlog_errno(ret); | |
6620 | goto out_commit; | |
6621 | } | |
6622 | ||
6623 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6624 | osb->sb->s_blocksize - header_off); | |
6625 | ||
6626 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6627 | new_blk_bh, new_xh, &vb, meta_ac, | |
6628 | ocfs2_get_xattr_value_root, NULL); | |
6629 | if (ret) { | |
6630 | mlog_errno(ret); | |
6631 | goto out_commit; | |
6632 | } | |
6633 | ||
6634 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6635 | ||
6636 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6637 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6638 | spin_lock(&new_oi->ip_lock); | |
6639 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6640 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6641 | spin_unlock(&new_oi->ip_lock); | |
6642 | ||
6643 | ocfs2_journal_dirty(handle, args->new_bh); | |
6644 | } | |
6645 | ||
6646 | out_commit: | |
6647 | ocfs2_commit_trans(osb, handle); | |
6648 | ||
6649 | out: | |
6650 | ocfs2_free_alloc_context(meta_ac); | |
6651 | return ret; | |
6652 | } | |
6653 | ||
6654 | struct ocfs2_reflink_xattr_tree_args { | |
6655 | struct ocfs2_xattr_reflink *reflink; | |
6656 | struct buffer_head *old_blk_bh; | |
6657 | struct buffer_head *new_blk_bh; | |
6658 | struct ocfs2_xattr_bucket *old_bucket; | |
6659 | struct ocfs2_xattr_bucket *new_bucket; | |
6660 | }; | |
6661 | ||
6662 | /* | |
6663 | * NOTE: | |
6664 | * We have to handle the case that both old bucket and new bucket | |
6665 | * will call this function to get the right ret_bh. | |
6666 | * So The caller must give us the right bh. | |
6667 | */ | |
6668 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6669 | struct buffer_head *bh, | |
6670 | struct ocfs2_xattr_header *xh, | |
6671 | int offset, | |
6672 | struct ocfs2_xattr_value_root **xv, | |
6673 | struct buffer_head **ret_bh, | |
6674 | void *para) | |
6675 | { | |
6676 | struct ocfs2_reflink_xattr_tree_args *args = | |
6677 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6678 | struct ocfs2_xattr_bucket *bucket; | |
6679 | ||
6680 | if (bh == args->old_bucket->bu_bhs[0]) | |
6681 | bucket = args->old_bucket; | |
6682 | else | |
6683 | bucket = args->new_bucket; | |
6684 | ||
6685 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6686 | xv, ret_bh); | |
6687 | } | |
6688 | ||
6689 | struct ocfs2_value_tree_metas { | |
6690 | int num_metas; | |
6691 | int credits; | |
6692 | int num_recs; | |
6693 | }; | |
6694 | ||
6695 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6696 | struct buffer_head *bh, | |
6697 | struct ocfs2_xattr_header *xh, | |
6698 | int offset, | |
6699 | struct ocfs2_xattr_value_root **xv, | |
6700 | struct buffer_head **ret_bh, | |
6701 | void *para) | |
6702 | { | |
6703 | struct ocfs2_xattr_bucket *bucket = | |
6704 | (struct ocfs2_xattr_bucket *)para; | |
6705 | ||
6706 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6707 | xv, ret_bh); | |
6708 | } | |
6709 | ||
6710 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6711 | struct ocfs2_xattr_bucket *bucket, | |
6712 | void *para) | |
6713 | { | |
6714 | struct ocfs2_value_tree_metas *metas = | |
6715 | (struct ocfs2_value_tree_metas *)para; | |
6716 | struct ocfs2_xattr_header *xh = | |
6717 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6718 | ||
6719 | /* Add the credits for this bucket first. */ | |
6720 | metas->credits += bucket->bu_blocks; | |
6721 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6722 | xh, &metas->num_metas, | |
6723 | &metas->credits, &metas->num_recs, | |
6724 | ocfs2_value_tree_metas_in_bucket, | |
6725 | bucket); | |
6726 | } | |
6727 | ||
6728 | /* | |
6729 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6730 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6731 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6732 | */ | |
6733 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6734 | struct ocfs2_reflink_xattr_tree_args *args, | |
6735 | struct ocfs2_extent_tree *xt_et, | |
6736 | u64 blkno, u32 len, int *credits, | |
6737 | struct ocfs2_alloc_context **meta_ac, | |
6738 | struct ocfs2_alloc_context **data_ac) | |
6739 | { | |
6740 | int ret, num_free_extents; | |
6741 | struct ocfs2_value_tree_metas metas; | |
6742 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6743 | struct ocfs2_refcount_block *rb; | |
6744 | ||
6745 | memset(&metas, 0, sizeof(metas)); | |
6746 | ||
6747 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6748 | ocfs2_calc_value_tree_metas, &metas); | |
6749 | if (ret) { | |
6750 | mlog_errno(ret); | |
6751 | goto out; | |
6752 | } | |
6753 | ||
6754 | *credits = metas.credits; | |
6755 | ||
6756 | /* | |
6757 | * Calculate we need for refcount tree change. | |
6758 | * | |
6759 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6760 | * an approximate number we need for refcount tree change. | |
6761 | * Sometimes we need to split the tree, and after split, half recs | |
6762 | * will be moved to the new block, and a new block can only provide | |
6763 | * half number of recs. So we multiple new blocks by 2. | |
6764 | * In the end, we have to add credits for modifying the already | |
6765 | * existed refcount block. | |
6766 | */ | |
6767 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6768 | metas.num_recs = | |
6769 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6770 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6771 | metas.num_metas += metas.num_recs; | |
6772 | *credits += metas.num_recs + | |
6773 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6774 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6775 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6776 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6777 | else | |
6778 | *credits += 1; | |
6779 | ||
6780 | /* count in the xattr tree change. */ | |
6781 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); | |
6782 | if (num_free_extents < 0) { | |
6783 | ret = num_free_extents; | |
6784 | mlog_errno(ret); | |
6785 | goto out; | |
6786 | } | |
6787 | ||
6788 | if (num_free_extents < len) | |
6789 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6790 | ||
6791 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
06f9da6e | 6792 | xt_et->et_root_el); |
2999d12f TM |
6793 | |
6794 | if (metas.num_metas) { | |
6795 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6796 | meta_ac); | |
6797 | if (ret) { | |
6798 | mlog_errno(ret); | |
6799 | goto out; | |
6800 | } | |
6801 | } | |
6802 | ||
6803 | if (len) { | |
6804 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6805 | if (ret) | |
6806 | mlog_errno(ret); | |
6807 | } | |
6808 | out: | |
6809 | if (ret) { | |
6810 | if (*meta_ac) { | |
6811 | ocfs2_free_alloc_context(*meta_ac); | |
6cae6d31 | 6812 | *meta_ac = NULL; |
2999d12f TM |
6813 | } |
6814 | } | |
6815 | ||
6816 | return ret; | |
6817 | } | |
6818 | ||
121a39bb | 6819 | static int ocfs2_reflink_xattr_bucket(handle_t *handle, |
2999d12f | 6820 | u64 blkno, u64 new_blkno, u32 clusters, |
121a39bb | 6821 | u32 *cpos, int num_buckets, |
2999d12f TM |
6822 | struct ocfs2_alloc_context *meta_ac, |
6823 | struct ocfs2_alloc_context *data_ac, | |
6824 | struct ocfs2_reflink_xattr_tree_args *args) | |
6825 | { | |
6826 | int i, j, ret = 0; | |
6827 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
2999d12f TM |
6828 | int bpb = args->old_bucket->bu_blocks; |
6829 | struct ocfs2_xattr_value_buf vb = { | |
6830 | .vb_access = ocfs2_journal_access, | |
6831 | }; | |
6832 | ||
6833 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6834 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6835 | if (ret) { | |
6836 | mlog_errno(ret); | |
6837 | break; | |
6838 | } | |
6839 | ||
9c339255 | 6840 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno, 1); |
2999d12f TM |
6841 | if (ret) { |
6842 | mlog_errno(ret); | |
6843 | break; | |
6844 | } | |
6845 | ||
2999d12f TM |
6846 | ret = ocfs2_xattr_bucket_journal_access(handle, |
6847 | args->new_bucket, | |
6848 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6849 | if (ret) { | |
6850 | mlog_errno(ret); | |
6851 | break; | |
6852 | } | |
6853 | ||
6854 | for (j = 0; j < bpb; j++) | |
6855 | memcpy(bucket_block(args->new_bucket, j), | |
6856 | bucket_block(args->old_bucket, j), | |
6857 | sb->s_blocksize); | |
6858 | ||
121a39bb TM |
6859 | /* |
6860 | * Record the start cpos so that we can use it to initialize | |
6861 | * our xattr tree we also set the xh_num_bucket for the new | |
6862 | * bucket. | |
6863 | */ | |
6864 | if (i == 0) { | |
6865 | *cpos = le32_to_cpu(bucket_xh(args->new_bucket)-> | |
6866 | xh_entries[0].xe_name_hash); | |
6867 | bucket_xh(args->new_bucket)->xh_num_buckets = | |
6868 | cpu_to_le16(num_buckets); | |
6869 | } | |
6870 | ||
2999d12f TM |
6871 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); |
6872 | ||
6873 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6874 | args->old_bucket->bu_bhs[0], | |
6875 | bucket_xh(args->old_bucket), | |
6876 | args->new_bucket->bu_bhs[0], | |
6877 | bucket_xh(args->new_bucket), | |
6878 | &vb, meta_ac, | |
6879 | ocfs2_get_reflink_xattr_value_root, | |
6880 | args); | |
6881 | if (ret) { | |
6882 | mlog_errno(ret); | |
6883 | break; | |
6884 | } | |
6885 | ||
6886 | /* | |
6887 | * Re-access and dirty the bucket to calculate metaecc. | |
6888 | * Because we may extend the transaction in reflink_xattr_header | |
6889 | * which will let the already accessed block gone. | |
6890 | */ | |
6891 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6892 | args->new_bucket, | |
6893 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6894 | if (ret) { | |
6895 | mlog_errno(ret); | |
6896 | break; | |
6897 | } | |
6898 | ||
6899 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
121a39bb | 6900 | |
2999d12f TM |
6901 | ocfs2_xattr_bucket_relse(args->old_bucket); |
6902 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6903 | } | |
6904 | ||
6905 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6906 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6907 | return ret; | |
6908 | } | |
121a39bb TM |
6909 | |
6910 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6911 | struct inode *inode, | |
6912 | struct ocfs2_reflink_xattr_tree_args *args, | |
6913 | struct ocfs2_extent_tree *et, | |
6914 | struct ocfs2_alloc_context *meta_ac, | |
6915 | struct ocfs2_alloc_context *data_ac, | |
6916 | u64 blkno, u32 cpos, u32 len) | |
6917 | { | |
6918 | int ret, first_inserted = 0; | |
6919 | u32 p_cluster, num_clusters, reflink_cpos = 0; | |
6920 | u64 new_blkno; | |
6921 | unsigned int num_buckets, reflink_buckets; | |
6922 | unsigned int bpc = | |
6923 | ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); | |
6924 | ||
6925 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6926 | if (ret) { | |
6927 | mlog_errno(ret); | |
6928 | goto out; | |
6929 | } | |
6930 | num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets); | |
6931 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6932 | ||
6933 | while (len && num_buckets) { | |
6934 | ret = ocfs2_claim_clusters(handle, data_ac, | |
6935 | 1, &p_cluster, &num_clusters); | |
6936 | if (ret) { | |
6937 | mlog_errno(ret); | |
6938 | goto out; | |
6939 | } | |
6940 | ||
6941 | new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
6942 | reflink_buckets = min(num_buckets, bpc * num_clusters); | |
6943 | ||
6944 | ret = ocfs2_reflink_xattr_bucket(handle, blkno, | |
6945 | new_blkno, num_clusters, | |
6946 | &reflink_cpos, reflink_buckets, | |
6947 | meta_ac, data_ac, args); | |
6948 | if (ret) { | |
6949 | mlog_errno(ret); | |
6950 | goto out; | |
6951 | } | |
6952 | ||
6953 | /* | |
6954 | * For the 1st allocated cluster, we make it use the same cpos | |
6955 | * so that the xattr tree looks the same as the original one | |
6956 | * in the most case. | |
6957 | */ | |
6958 | if (!first_inserted) { | |
6959 | reflink_cpos = cpos; | |
6960 | first_inserted = 1; | |
6961 | } | |
6962 | ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno, | |
6963 | num_clusters, 0, meta_ac); | |
6964 | if (ret) | |
6965 | mlog_errno(ret); | |
6966 | ||
402b4183 TM |
6967 | trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno, |
6968 | num_clusters, reflink_cpos); | |
121a39bb TM |
6969 | |
6970 | len -= num_clusters; | |
6971 | blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters); | |
6972 | num_buckets -= reflink_buckets; | |
6973 | } | |
6974 | out: | |
6975 | return ret; | |
6976 | } | |
6977 | ||
2999d12f TM |
6978 | /* |
6979 | * Create the same xattr extent record in the new inode's xattr tree. | |
6980 | */ | |
6981 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6982 | struct buffer_head *root_bh, | |
6983 | u64 blkno, | |
6984 | u32 cpos, | |
6985 | u32 len, | |
6986 | void *para) | |
6987 | { | |
6988 | int ret, credits = 0; | |
2999d12f TM |
6989 | handle_t *handle; |
6990 | struct ocfs2_reflink_xattr_tree_args *args = | |
6991 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6992 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6993 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6994 | struct ocfs2_alloc_context *data_ac = NULL; | |
6995 | struct ocfs2_extent_tree et; | |
6996 | ||
402b4183 | 6997 | trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len); |
121a39bb | 6998 | |
2999d12f TM |
6999 | ocfs2_init_xattr_tree_extent_tree(&et, |
7000 | INODE_CACHE(args->reflink->new_inode), | |
7001 | args->new_blk_bh); | |
7002 | ||
7003 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
7004 | len, &credits, | |
7005 | &meta_ac, &data_ac); | |
7006 | if (ret) { | |
7007 | mlog_errno(ret); | |
7008 | goto out; | |
7009 | } | |
7010 | ||
7011 | handle = ocfs2_start_trans(osb, credits); | |
7012 | if (IS_ERR(handle)) { | |
7013 | ret = PTR_ERR(handle); | |
7014 | mlog_errno(ret); | |
7015 | goto out; | |
7016 | } | |
7017 | ||
121a39bb TM |
7018 | ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et, |
7019 | meta_ac, data_ac, | |
7020 | blkno, cpos, len); | |
2999d12f TM |
7021 | if (ret) |
7022 | mlog_errno(ret); | |
7023 | ||
2999d12f TM |
7024 | ocfs2_commit_trans(osb, handle); |
7025 | ||
7026 | out: | |
7027 | if (meta_ac) | |
7028 | ocfs2_free_alloc_context(meta_ac); | |
7029 | if (data_ac) | |
7030 | ocfs2_free_alloc_context(data_ac); | |
7031 | return ret; | |
7032 | } | |
7033 | ||
7034 | /* | |
7035 | * Create reflinked xattr buckets. | |
7036 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
7037 | * if they are stored outside. | |
7038 | */ | |
7039 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
7040 | struct buffer_head *blk_bh, | |
7041 | struct buffer_head *new_blk_bh) | |
7042 | { | |
7043 | int ret; | |
7044 | struct ocfs2_reflink_xattr_tree_args para; | |
7045 | ||
7046 | memset(¶, 0, sizeof(para)); | |
7047 | para.reflink = args; | |
7048 | para.old_blk_bh = blk_bh; | |
7049 | para.new_blk_bh = new_blk_bh; | |
7050 | ||
7051 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
7052 | if (!para.old_bucket) { | |
7053 | mlog_errno(-ENOMEM); | |
7054 | return -ENOMEM; | |
7055 | } | |
7056 | ||
7057 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
7058 | if (!para.new_bucket) { | |
7059 | ret = -ENOMEM; | |
7060 | mlog_errno(ret); | |
7061 | goto out; | |
7062 | } | |
7063 | ||
7064 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
7065 | ocfs2_reflink_xattr_rec, | |
7066 | ¶); | |
7067 | if (ret) | |
7068 | mlog_errno(ret); | |
7069 | ||
7070 | out: | |
7071 | ocfs2_xattr_bucket_free(para.old_bucket); | |
7072 | ocfs2_xattr_bucket_free(para.new_bucket); | |
7073 | return ret; | |
7074 | } | |
7075 | ||
7076 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
7077 | struct buffer_head *blk_bh) | |
7078 | { | |
7079 | int ret, indexed = 0; | |
7080 | struct buffer_head *new_blk_bh = NULL; | |
7081 | struct ocfs2_xattr_block *xb = | |
7082 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
7083 | ||
7084 | ||
7085 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
7086 | indexed = 1; | |
7087 | ||
7088 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
7089 | &new_blk_bh, indexed); | |
7090 | if (ret) { | |
7091 | mlog_errno(ret); | |
7092 | goto out; | |
7093 | } | |
7094 | ||
2decd65a | 7095 | if (!indexed) |
2999d12f TM |
7096 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); |
7097 | else | |
7098 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
7099 | if (ret) | |
7100 | mlog_errno(ret); | |
7101 | ||
7102 | out: | |
7103 | brelse(new_blk_bh); | |
7104 | return ret; | |
7105 | } | |
7106 | ||
0fe9b66c TM |
7107 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
7108 | { | |
7109 | int type = ocfs2_xattr_get_type(xe); | |
7110 | ||
7111 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
7112 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
7113 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
7114 | } | |
7115 | ||
2999d12f TM |
7116 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
7117 | struct buffer_head *old_bh, | |
7118 | struct inode *new_inode, | |
0fe9b66c TM |
7119 | struct buffer_head *new_bh, |
7120 | bool preserve_security) | |
2999d12f TM |
7121 | { |
7122 | int ret; | |
7123 | struct ocfs2_xattr_reflink args; | |
7124 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
7125 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
7126 | struct buffer_head *blk_bh = NULL; | |
7127 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
7128 | struct ocfs2_refcount_tree *ref_tree; | |
7129 | struct buffer_head *ref_root_bh = NULL; | |
7130 | ||
7131 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7132 | le64_to_cpu(di->i_refcount_loc), | |
7133 | 1, &ref_tree, &ref_root_bh); | |
7134 | if (ret) { | |
7135 | mlog_errno(ret); | |
7136 | goto out; | |
7137 | } | |
7138 | ||
7139 | ocfs2_init_dealloc_ctxt(&dealloc); | |
7140 | ||
7141 | args.old_inode = old_inode; | |
7142 | args.new_inode = new_inode; | |
7143 | args.old_bh = old_bh; | |
7144 | args.new_bh = new_bh; | |
7145 | args.ref_ci = &ref_tree->rf_ci; | |
7146 | args.ref_root_bh = ref_root_bh; | |
7147 | args.dealloc = &dealloc; | |
0fe9b66c TM |
7148 | if (preserve_security) |
7149 | args.xattr_reflinked = NULL; | |
7150 | else | |
7151 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
7152 | |
7153 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
7154 | ret = ocfs2_reflink_xattr_inline(&args); | |
7155 | if (ret) { | |
7156 | mlog_errno(ret); | |
7157 | goto out_unlock; | |
7158 | } | |
7159 | } | |
7160 | ||
7161 | if (!di->i_xattr_loc) | |
7162 | goto out_unlock; | |
7163 | ||
7164 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
7165 | &blk_bh); | |
7166 | if (ret < 0) { | |
7167 | mlog_errno(ret); | |
7168 | goto out_unlock; | |
7169 | } | |
7170 | ||
7171 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
7172 | if (ret) | |
7173 | mlog_errno(ret); | |
7174 | ||
7175 | brelse(blk_bh); | |
7176 | ||
7177 | out_unlock: | |
7178 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7179 | ref_tree, 1); | |
7180 | brelse(ref_root_bh); | |
7181 | ||
7182 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
7183 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
7184 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
7185 | } | |
7186 | ||
7187 | out: | |
7188 | return ret; | |
7189 | } | |
7190 | ||
0fe9b66c TM |
7191 | /* |
7192 | * Initialize security and acl for a already created inode. | |
7193 | * Used for reflink a non-preserve-security file. | |
7194 | * | |
7195 | * It uses common api like ocfs2_xattr_set, so the caller | |
7196 | * must not hold any lock expect i_mutex. | |
7197 | */ | |
7198 | int ocfs2_init_security_and_acl(struct inode *dir, | |
2a7dba39 | 7199 | struct inode *inode, |
702e5bc6 CH |
7200 | const struct qstr *qstr, |
7201 | struct posix_acl *default_acl, | |
7202 | struct posix_acl *acl) | |
0fe9b66c | 7203 | { |
0fe9b66c | 7204 | struct buffer_head *dir_bh = NULL; |
702e5bc6 | 7205 | int ret = 0; |
0fe9b66c | 7206 | |
9d8f13ba | 7207 | ret = ocfs2_init_security_get(inode, dir, qstr, NULL); |
32918dd9 | 7208 | if (ret) { |
0fe9b66c TM |
7209 | mlog_errno(ret); |
7210 | goto leave; | |
7211 | } | |
7212 | ||
7213 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
7214 | if (ret) { | |
7215 | mlog_errno(ret); | |
7216 | goto leave; | |
7217 | } | |
7218 | ||
702e5bc6 CH |
7219 | if (!ret && default_acl) |
7220 | ret = ocfs2_iop_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); | |
7221 | if (!ret && acl) | |
7222 | ret = ocfs2_iop_set_acl(inode, acl, ACL_TYPE_ACCESS); | |
0fe9b66c TM |
7223 | |
7224 | ocfs2_inode_unlock(dir, 0); | |
7225 | brelse(dir_bh); | |
7226 | leave: | |
7227 | return ret; | |
7228 | } | |
923f7f31 TY |
7229 | /* |
7230 | * 'security' attributes support | |
7231 | */ | |
431547b3 | 7232 | static size_t ocfs2_xattr_security_list(struct dentry *dentry, char *list, |
923f7f31 | 7233 | size_t list_size, const char *name, |
431547b3 | 7234 | size_t name_len, int type) |
923f7f31 TY |
7235 | { |
7236 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
7237 | const size_t total_len = prefix_len + name_len + 1; | |
7238 | ||
7239 | if (list && total_len <= list_size) { | |
7240 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
7241 | memcpy(list + prefix_len, name, name_len); | |
7242 | list[prefix_len + name_len] = '\0'; | |
7243 | } | |
7244 | return total_len; | |
7245 | } | |
7246 | ||
431547b3 CH |
7247 | static int ocfs2_xattr_security_get(struct dentry *dentry, const char *name, |
7248 | void *buffer, size_t size, int type) | |
923f7f31 TY |
7249 | { |
7250 | if (strcmp(name, "") == 0) | |
7251 | return -EINVAL; | |
2b0143b5 | 7252 | return ocfs2_xattr_get(d_inode(dentry), OCFS2_XATTR_INDEX_SECURITY, |
431547b3 | 7253 | name, buffer, size); |
923f7f31 TY |
7254 | } |
7255 | ||
431547b3 CH |
7256 | static int ocfs2_xattr_security_set(struct dentry *dentry, const char *name, |
7257 | const void *value, size_t size, int flags, int type) | |
923f7f31 TY |
7258 | { |
7259 | if (strcmp(name, "") == 0) | |
7260 | return -EINVAL; | |
7261 | ||
2b0143b5 | 7262 | return ocfs2_xattr_set(d_inode(dentry), OCFS2_XATTR_INDEX_SECURITY, |
431547b3 | 7263 | name, value, size, flags); |
923f7f31 TY |
7264 | } |
7265 | ||
b519ea6d | 7266 | static int ocfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba MZ |
7267 | void *fs_info) |
7268 | { | |
7269 | const struct xattr *xattr; | |
7270 | int err = 0; | |
7271 | ||
7272 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
7273 | err = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, | |
7274 | xattr->name, xattr->value, | |
7275 | xattr->value_len, XATTR_CREATE); | |
7276 | if (err) | |
7277 | break; | |
7278 | } | |
7279 | return err; | |
7280 | } | |
7281 | ||
534eaddd TY |
7282 | int ocfs2_init_security_get(struct inode *inode, |
7283 | struct inode *dir, | |
2a7dba39 | 7284 | const struct qstr *qstr, |
534eaddd TY |
7285 | struct ocfs2_security_xattr_info *si) |
7286 | { | |
38d59ef6 TY |
7287 | /* check whether ocfs2 support feature xattr */ |
7288 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7289 | return -EOPNOTSUPP; | |
9d8f13ba MZ |
7290 | if (si) |
7291 | return security_old_inode_init_security(inode, dir, qstr, | |
7292 | &si->name, &si->value, | |
7293 | &si->value_len); | |
7294 | ||
7295 | return security_inode_init_security(inode, dir, qstr, | |
7296 | &ocfs2_initxattrs, NULL); | |
534eaddd TY |
7297 | } |
7298 | ||
7299 | int ocfs2_init_security_set(handle_t *handle, | |
7300 | struct inode *inode, | |
7301 | struct buffer_head *di_bh, | |
7302 | struct ocfs2_security_xattr_info *si, | |
7303 | struct ocfs2_alloc_context *xattr_ac, | |
7304 | struct ocfs2_alloc_context *data_ac) | |
7305 | { | |
7306 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7307 | OCFS2_XATTR_INDEX_SECURITY, | |
7308 | si->name, si->value, si->value_len, 0, | |
7309 | xattr_ac, data_ac); | |
7310 | } | |
7311 | ||
537d81ca | 7312 | const struct xattr_handler ocfs2_xattr_security_handler = { |
923f7f31 TY |
7313 | .prefix = XATTR_SECURITY_PREFIX, |
7314 | .list = ocfs2_xattr_security_list, | |
7315 | .get = ocfs2_xattr_security_get, | |
7316 | .set = ocfs2_xattr_security_set, | |
7317 | }; | |
7318 | ||
99219aea MF |
7319 | /* |
7320 | * 'trusted' attributes support | |
7321 | */ | |
431547b3 | 7322 | static size_t ocfs2_xattr_trusted_list(struct dentry *dentry, char *list, |
99219aea | 7323 | size_t list_size, const char *name, |
431547b3 | 7324 | size_t name_len, int type) |
99219aea | 7325 | { |
ceb1eba3 | 7326 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
7327 | const size_t total_len = prefix_len + name_len + 1; |
7328 | ||
0f5e7b41 SK |
7329 | if (!capable(CAP_SYS_ADMIN)) |
7330 | return 0; | |
7331 | ||
99219aea MF |
7332 | if (list && total_len <= list_size) { |
7333 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
7334 | memcpy(list + prefix_len, name, name_len); | |
7335 | list[prefix_len + name_len] = '\0'; | |
7336 | } | |
7337 | return total_len; | |
7338 | } | |
7339 | ||
431547b3 CH |
7340 | static int ocfs2_xattr_trusted_get(struct dentry *dentry, const char *name, |
7341 | void *buffer, size_t size, int type) | |
99219aea MF |
7342 | { |
7343 | if (strcmp(name, "") == 0) | |
7344 | return -EINVAL; | |
2b0143b5 | 7345 | return ocfs2_xattr_get(d_inode(dentry), OCFS2_XATTR_INDEX_TRUSTED, |
431547b3 | 7346 | name, buffer, size); |
99219aea MF |
7347 | } |
7348 | ||
431547b3 CH |
7349 | static int ocfs2_xattr_trusted_set(struct dentry *dentry, const char *name, |
7350 | const void *value, size_t size, int flags, int type) | |
99219aea MF |
7351 | { |
7352 | if (strcmp(name, "") == 0) | |
7353 | return -EINVAL; | |
7354 | ||
2b0143b5 | 7355 | return ocfs2_xattr_set(d_inode(dentry), OCFS2_XATTR_INDEX_TRUSTED, |
431547b3 | 7356 | name, value, size, flags); |
99219aea MF |
7357 | } |
7358 | ||
537d81ca | 7359 | const struct xattr_handler ocfs2_xattr_trusted_handler = { |
99219aea MF |
7360 | .prefix = XATTR_TRUSTED_PREFIX, |
7361 | .list = ocfs2_xattr_trusted_list, | |
7362 | .get = ocfs2_xattr_trusted_get, | |
7363 | .set = ocfs2_xattr_trusted_set, | |
7364 | }; | |
7365 | ||
99219aea MF |
7366 | /* |
7367 | * 'user' attributes support | |
7368 | */ | |
431547b3 | 7369 | static size_t ocfs2_xattr_user_list(struct dentry *dentry, char *list, |
99219aea | 7370 | size_t list_size, const char *name, |
431547b3 | 7371 | size_t name_len, int type) |
99219aea | 7372 | { |
ceb1eba3 | 7373 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea | 7374 | const size_t total_len = prefix_len + name_len + 1; |
431547b3 | 7375 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7376 | |
7377 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7378 | return 0; | |
7379 | ||
7380 | if (list && total_len <= list_size) { | |
7381 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
7382 | memcpy(list + prefix_len, name, name_len); | |
7383 | list[prefix_len + name_len] = '\0'; | |
7384 | } | |
7385 | return total_len; | |
7386 | } | |
7387 | ||
431547b3 CH |
7388 | static int ocfs2_xattr_user_get(struct dentry *dentry, const char *name, |
7389 | void *buffer, size_t size, int type) | |
99219aea | 7390 | { |
431547b3 | 7391 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7392 | |
7393 | if (strcmp(name, "") == 0) | |
7394 | return -EINVAL; | |
7395 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7396 | return -EOPNOTSUPP; | |
2b0143b5 | 7397 | return ocfs2_xattr_get(d_inode(dentry), OCFS2_XATTR_INDEX_USER, name, |
99219aea MF |
7398 | buffer, size); |
7399 | } | |
7400 | ||
431547b3 CH |
7401 | static int ocfs2_xattr_user_set(struct dentry *dentry, const char *name, |
7402 | const void *value, size_t size, int flags, int type) | |
99219aea | 7403 | { |
431547b3 | 7404 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7405 | |
7406 | if (strcmp(name, "") == 0) | |
7407 | return -EINVAL; | |
7408 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7409 | return -EOPNOTSUPP; | |
7410 | ||
2b0143b5 | 7411 | return ocfs2_xattr_set(d_inode(dentry), OCFS2_XATTR_INDEX_USER, |
431547b3 | 7412 | name, value, size, flags); |
99219aea MF |
7413 | } |
7414 | ||
537d81ca | 7415 | const struct xattr_handler ocfs2_xattr_user_handler = { |
99219aea MF |
7416 | .prefix = XATTR_USER_PREFIX, |
7417 | .list = ocfs2_xattr_user_list, | |
7418 | .get = ocfs2_xattr_user_get, | |
7419 | .set = ocfs2_xattr_user_set, | |
7420 | }; |