Commit | Line | Data |
---|---|---|
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> | |
cf1d6c76 | 38 | |
f56654c4 TM |
39 | #define MLOG_MASK_PREFIX ML_XATTR |
40 | #include <cluster/masklog.h> | |
41 | ||
42 | #include "ocfs2.h" | |
43 | #include "alloc.h" | |
44 | #include "dlmglue.h" | |
45 | #include "file.h" | |
cf1d6c76 TY |
46 | #include "symlink.h" |
47 | #include "sysfile.h" | |
f56654c4 TM |
48 | #include "inode.h" |
49 | #include "journal.h" | |
50 | #include "ocfs2_fs.h" | |
51 | #include "suballoc.h" | |
52 | #include "uptodate.h" | |
53 | #include "buffer_head_io.h" | |
0c044f0b | 54 | #include "super.h" |
cf1d6c76 TY |
55 | #include "xattr.h" |
56 | ||
57 | ||
58 | struct ocfs2_xattr_def_value_root { | |
59 | struct ocfs2_xattr_value_root xv; | |
60 | struct ocfs2_extent_rec er; | |
61 | }; | |
62 | ||
0c044f0b TM |
63 | struct ocfs2_xattr_bucket { |
64 | struct buffer_head *bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; | |
65 | struct ocfs2_xattr_header *xh; | |
66 | }; | |
67 | ||
cf1d6c76 TY |
68 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
69 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
70 | ||
71 | static struct ocfs2_xattr_def_value_root def_xv = { | |
72 | .xv.xr_list.l_count = cpu_to_le16(1), | |
73 | }; | |
74 | ||
75 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
76 | &ocfs2_xattr_user_handler, | |
77 | &ocfs2_xattr_trusted_handler, | |
78 | NULL | |
79 | }; | |
80 | ||
81 | static struct xattr_handler *ocfs2_xattr_handler_map[] = { | |
82 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, | |
83 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, | |
84 | }; | |
85 | ||
86 | struct ocfs2_xattr_info { | |
87 | int name_index; | |
88 | const char *name; | |
89 | const void *value; | |
90 | size_t value_len; | |
91 | }; | |
92 | ||
93 | struct ocfs2_xattr_search { | |
94 | struct buffer_head *inode_bh; | |
95 | /* | |
96 | * xattr_bh point to the block buffer head which has extended attribute | |
97 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
98 | */ | |
99 | struct buffer_head *xattr_bh; | |
100 | struct ocfs2_xattr_header *header; | |
589dc260 | 101 | struct ocfs2_xattr_bucket bucket; |
cf1d6c76 TY |
102 | void *base; |
103 | void *end; | |
104 | struct ocfs2_xattr_entry *here; | |
105 | int not_found; | |
106 | }; | |
107 | ||
589dc260 TM |
108 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
109 | struct ocfs2_xattr_header *xh, | |
110 | int index, | |
111 | int *block_off, | |
112 | int *new_offset); | |
113 | ||
114 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
115 | struct buffer_head *root_bh, | |
116 | int name_index, | |
117 | const char *name, | |
118 | struct ocfs2_xattr_search *xs); | |
119 | ||
0c044f0b TM |
120 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
121 | struct ocfs2_xattr_tree_root *xt, | |
122 | char *buffer, | |
123 | size_t buffer_size); | |
124 | ||
01225596 TM |
125 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
126 | struct ocfs2_xattr_search *xs); | |
127 | ||
128 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
129 | struct ocfs2_xattr_info *xi, | |
130 | struct ocfs2_xattr_search *xs); | |
131 | ||
a3944256 TM |
132 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
133 | struct buffer_head *xb_bh); | |
134 | ||
0030e001 TY |
135 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
136 | { | |
137 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
138 | } | |
139 | ||
140 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
141 | { | |
142 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
143 | } | |
144 | ||
145 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
146 | { | |
147 | u16 len = sb->s_blocksize - | |
148 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
149 | ||
150 | return len / sizeof(struct ocfs2_xattr_entry); | |
151 | } | |
152 | ||
936b8834 | 153 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
154 | { |
155 | struct xattr_handler *handler = NULL; | |
156 | ||
157 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
158 | handler = ocfs2_xattr_handler_map[name_index]; | |
159 | ||
936b8834 | 160 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
161 | } |
162 | ||
40daa16a | 163 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 164 | const char *name, |
40daa16a | 165 | int name_len) |
cf1d6c76 TY |
166 | { |
167 | /* Get hash value of uuid from super block */ | |
168 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
169 | int i; | |
170 | ||
cf1d6c76 TY |
171 | /* hash extended attribute name */ |
172 | for (i = 0; i < name_len; i++) { | |
173 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
174 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
175 | *name++; | |
176 | } | |
177 | ||
178 | return hash; | |
179 | } | |
180 | ||
181 | /* | |
182 | * ocfs2_xattr_hash_entry() | |
183 | * | |
184 | * Compute the hash of an extended attribute. | |
185 | */ | |
186 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
187 | struct ocfs2_xattr_header *header, | |
188 | struct ocfs2_xattr_entry *entry) | |
189 | { | |
190 | u32 hash = 0; | |
cf1d6c76 | 191 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 192 | |
2057e5c6 | 193 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
194 | entry->xe_name_hash = cpu_to_le32(hash); |
195 | ||
196 | return; | |
197 | } | |
f56654c4 TM |
198 | |
199 | static int ocfs2_xattr_extend_allocation(struct inode *inode, | |
200 | u32 clusters_to_add, | |
201 | struct buffer_head *xattr_bh, | |
202 | struct ocfs2_xattr_value_root *xv) | |
203 | { | |
204 | int status = 0; | |
205 | int restart_func = 0; | |
206 | int credits = 0; | |
207 | handle_t *handle = NULL; | |
208 | struct ocfs2_alloc_context *data_ac = NULL; | |
209 | struct ocfs2_alloc_context *meta_ac = NULL; | |
210 | enum ocfs2_alloc_restarted why; | |
211 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f56654c4 | 212 | u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); |
f99b9b7c | 213 | struct ocfs2_extent_tree et; |
f56654c4 TM |
214 | |
215 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
216 | ||
8d6220d6 | 217 | ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
f99b9b7c | 218 | |
f56654c4 TM |
219 | restart_all: |
220 | ||
f99b9b7c JB |
221 | status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
222 | &data_ac, &meta_ac); | |
f56654c4 TM |
223 | if (status) { |
224 | mlog_errno(status); | |
225 | goto leave; | |
226 | } | |
227 | ||
f99b9b7c JB |
228 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
229 | clusters_to_add); | |
f56654c4 TM |
230 | handle = ocfs2_start_trans(osb, credits); |
231 | if (IS_ERR(handle)) { | |
232 | status = PTR_ERR(handle); | |
233 | handle = NULL; | |
234 | mlog_errno(status); | |
235 | goto leave; | |
236 | } | |
237 | ||
238 | restarted_transaction: | |
239 | status = ocfs2_journal_access(handle, inode, xattr_bh, | |
240 | OCFS2_JOURNAL_ACCESS_WRITE); | |
241 | if (status < 0) { | |
242 | mlog_errno(status); | |
243 | goto leave; | |
244 | } | |
245 | ||
246 | prev_clusters = le32_to_cpu(xv->xr_clusters); | |
247 | status = ocfs2_add_clusters_in_btree(osb, | |
248 | inode, | |
249 | &logical_start, | |
250 | clusters_to_add, | |
251 | 0, | |
f99b9b7c | 252 | &et, |
f56654c4 TM |
253 | handle, |
254 | data_ac, | |
255 | meta_ac, | |
f99b9b7c | 256 | &why); |
f56654c4 TM |
257 | if ((status < 0) && (status != -EAGAIN)) { |
258 | if (status != -ENOSPC) | |
259 | mlog_errno(status); | |
260 | goto leave; | |
261 | } | |
262 | ||
263 | status = ocfs2_journal_dirty(handle, xattr_bh); | |
264 | if (status < 0) { | |
265 | mlog_errno(status); | |
266 | goto leave; | |
267 | } | |
268 | ||
269 | clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; | |
270 | ||
271 | if (why != RESTART_NONE && clusters_to_add) { | |
272 | if (why == RESTART_META) { | |
273 | mlog(0, "restarting function.\n"); | |
274 | restart_func = 1; | |
275 | } else { | |
276 | BUG_ON(why != RESTART_TRANS); | |
277 | ||
278 | mlog(0, "restarting transaction.\n"); | |
279 | /* TODO: This can be more intelligent. */ | |
280 | credits = ocfs2_calc_extend_credits(osb->sb, | |
f99b9b7c | 281 | et.et_root_el, |
f56654c4 TM |
282 | clusters_to_add); |
283 | status = ocfs2_extend_trans(handle, credits); | |
284 | if (status < 0) { | |
285 | /* handle still has to be committed at | |
286 | * this point. */ | |
287 | status = -ENOMEM; | |
288 | mlog_errno(status); | |
289 | goto leave; | |
290 | } | |
291 | goto restarted_transaction; | |
292 | } | |
293 | } | |
294 | ||
295 | leave: | |
296 | if (handle) { | |
297 | ocfs2_commit_trans(osb, handle); | |
298 | handle = NULL; | |
299 | } | |
300 | if (data_ac) { | |
301 | ocfs2_free_alloc_context(data_ac); | |
302 | data_ac = NULL; | |
303 | } | |
304 | if (meta_ac) { | |
305 | ocfs2_free_alloc_context(meta_ac); | |
306 | meta_ac = NULL; | |
307 | } | |
308 | if ((!status) && restart_func) { | |
309 | restart_func = 0; | |
310 | goto restart_all; | |
311 | } | |
312 | ||
313 | return status; | |
314 | } | |
315 | ||
316 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
317 | struct buffer_head *root_bh, | |
318 | struct ocfs2_xattr_value_root *xv, | |
319 | u32 cpos, u32 phys_cpos, u32 len, | |
320 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
321 | { | |
322 | int ret; | |
323 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
324 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
325 | struct inode *tl_inode = osb->osb_tl_inode; | |
326 | handle_t *handle; | |
327 | struct ocfs2_alloc_context *meta_ac = NULL; | |
f99b9b7c JB |
328 | struct ocfs2_extent_tree et; |
329 | ||
8d6220d6 | 330 | ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
f56654c4 | 331 | |
f99b9b7c | 332 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
f56654c4 TM |
333 | if (ret) { |
334 | mlog_errno(ret); | |
335 | return ret; | |
336 | } | |
337 | ||
338 | mutex_lock(&tl_inode->i_mutex); | |
339 | ||
340 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
341 | ret = __ocfs2_flush_truncate_log(osb); | |
342 | if (ret < 0) { | |
343 | mlog_errno(ret); | |
344 | goto out; | |
345 | } | |
346 | } | |
347 | ||
348 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
349 | if (IS_ERR(handle)) { | |
350 | ret = PTR_ERR(handle); | |
351 | mlog_errno(ret); | |
352 | goto out; | |
353 | } | |
354 | ||
355 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
356 | OCFS2_JOURNAL_ACCESS_WRITE); | |
357 | if (ret) { | |
358 | mlog_errno(ret); | |
359 | goto out_commit; | |
360 | } | |
361 | ||
f99b9b7c JB |
362 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
363 | dealloc); | |
f56654c4 TM |
364 | if (ret) { |
365 | mlog_errno(ret); | |
366 | goto out_commit; | |
367 | } | |
368 | ||
369 | le32_add_cpu(&xv->xr_clusters, -len); | |
370 | ||
371 | ret = ocfs2_journal_dirty(handle, root_bh); | |
372 | if (ret) { | |
373 | mlog_errno(ret); | |
374 | goto out_commit; | |
375 | } | |
376 | ||
377 | ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len); | |
378 | if (ret) | |
379 | mlog_errno(ret); | |
380 | ||
381 | out_commit: | |
382 | ocfs2_commit_trans(osb, handle); | |
383 | out: | |
384 | mutex_unlock(&tl_inode->i_mutex); | |
385 | ||
386 | if (meta_ac) | |
387 | ocfs2_free_alloc_context(meta_ac); | |
388 | ||
389 | return ret; | |
390 | } | |
391 | ||
392 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
393 | u32 old_clusters, | |
394 | u32 new_clusters, | |
395 | struct buffer_head *root_bh, | |
396 | struct ocfs2_xattr_value_root *xv) | |
397 | { | |
398 | int ret = 0; | |
399 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
400 | u64 block; | |
401 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
402 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
403 | ||
404 | ocfs2_init_dealloc_ctxt(&dealloc); | |
405 | ||
406 | if (old_clusters <= new_clusters) | |
407 | return 0; | |
408 | ||
409 | cpos = new_clusters; | |
410 | trunc_len = old_clusters - new_clusters; | |
411 | while (trunc_len) { | |
412 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
413 | &alloc_size, &xv->xr_list); | |
414 | if (ret) { | |
415 | mlog_errno(ret); | |
416 | goto out; | |
417 | } | |
418 | ||
419 | if (alloc_size > trunc_len) | |
420 | alloc_size = trunc_len; | |
421 | ||
422 | ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, | |
423 | phys_cpos, alloc_size, | |
424 | &dealloc); | |
425 | if (ret) { | |
426 | mlog_errno(ret); | |
427 | goto out; | |
428 | } | |
429 | ||
430 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
431 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
432 | alloc_size); | |
433 | cpos += alloc_size; | |
434 | trunc_len -= alloc_size; | |
435 | } | |
436 | ||
437 | out: | |
438 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
439 | ocfs2_run_deallocs(osb, &dealloc); | |
440 | ||
441 | return ret; | |
442 | } | |
443 | ||
444 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
445 | struct buffer_head *root_bh, | |
446 | struct ocfs2_xattr_value_root *xv, | |
447 | int len) | |
448 | { | |
449 | int ret; | |
450 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
451 | u32 old_clusters = le32_to_cpu(xv->xr_clusters); | |
452 | ||
453 | if (new_clusters == old_clusters) | |
454 | return 0; | |
455 | ||
456 | if (new_clusters > old_clusters) | |
457 | ret = ocfs2_xattr_extend_allocation(inode, | |
458 | new_clusters - old_clusters, | |
459 | root_bh, xv); | |
460 | else | |
461 | ret = ocfs2_xattr_shrink_size(inode, | |
462 | old_clusters, new_clusters, | |
463 | root_bh, xv); | |
464 | ||
465 | return ret; | |
466 | } | |
cf1d6c76 | 467 | |
936b8834 TM |
468 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
469 | size_t *result, const char *prefix, | |
470 | const char *name, int name_len) | |
471 | { | |
472 | char *p = buffer + *result; | |
473 | int prefix_len = strlen(prefix); | |
474 | int total_len = prefix_len + name_len + 1; | |
475 | ||
476 | *result += total_len; | |
477 | ||
478 | /* we are just looking for how big our buffer needs to be */ | |
479 | if (!size) | |
480 | return 0; | |
481 | ||
482 | if (*result > size) | |
483 | return -ERANGE; | |
484 | ||
485 | memcpy(p, prefix, prefix_len); | |
486 | memcpy(p + prefix_len, name, name_len); | |
487 | p[prefix_len + name_len] = '\0'; | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
cf1d6c76 TY |
492 | static int ocfs2_xattr_list_entries(struct inode *inode, |
493 | struct ocfs2_xattr_header *header, | |
494 | char *buffer, size_t buffer_size) | |
495 | { | |
936b8834 TM |
496 | size_t result = 0; |
497 | int i, type, ret; | |
498 | const char *prefix, *name; | |
cf1d6c76 TY |
499 | |
500 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
501 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
502 | type = ocfs2_xattr_get_type(entry); |
503 | prefix = ocfs2_xattr_prefix(type); | |
504 | ||
505 | if (prefix) { | |
506 | name = (const char *)header + | |
507 | le16_to_cpu(entry->xe_name_offset); | |
508 | ||
509 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
510 | &result, prefix, name, | |
511 | entry->xe_name_len); | |
512 | if (ret) | |
513 | return ret; | |
cf1d6c76 TY |
514 | } |
515 | } | |
516 | ||
936b8834 | 517 | return result; |
cf1d6c76 TY |
518 | } |
519 | ||
520 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
521 | struct ocfs2_dinode *di, | |
522 | char *buffer, | |
523 | size_t buffer_size) | |
524 | { | |
525 | struct ocfs2_xattr_header *header = NULL; | |
526 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
527 | int ret = 0; | |
528 | ||
529 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
530 | return ret; | |
531 | ||
532 | header = (struct ocfs2_xattr_header *) | |
533 | ((void *)di + inode->i_sb->s_blocksize - | |
534 | le16_to_cpu(di->i_xattr_inline_size)); | |
535 | ||
536 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
537 | ||
538 | return ret; | |
539 | } | |
540 | ||
541 | static int ocfs2_xattr_block_list(struct inode *inode, | |
542 | struct ocfs2_dinode *di, | |
543 | char *buffer, | |
544 | size_t buffer_size) | |
545 | { | |
546 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 547 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
548 | int ret = 0; |
549 | ||
550 | if (!di->i_xattr_loc) | |
551 | return ret; | |
552 | ||
0fcaa56a | 553 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
554 | if (ret < 0) { |
555 | mlog_errno(ret); | |
556 | return ret; | |
557 | } | |
558 | /*Verify the signature of xattr block*/ | |
559 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
560 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
561 | ret = -EFAULT; | |
562 | goto cleanup; | |
563 | } | |
564 | ||
0c044f0b | 565 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
cf1d6c76 | 566 | |
0c044f0b TM |
567 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
568 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
569 | ret = ocfs2_xattr_list_entries(inode, header, | |
570 | buffer, buffer_size); | |
571 | } else { | |
572 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
573 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
574 | buffer, buffer_size); | |
575 | } | |
cf1d6c76 TY |
576 | cleanup: |
577 | brelse(blk_bh); | |
578 | ||
579 | return ret; | |
580 | } | |
581 | ||
582 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
583 | char *buffer, | |
584 | size_t size) | |
585 | { | |
586 | int ret = 0, i_ret = 0, b_ret = 0; | |
587 | struct buffer_head *di_bh = NULL; | |
588 | struct ocfs2_dinode *di = NULL; | |
589 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
590 | ||
8154da3d TY |
591 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
592 | return -EOPNOTSUPP; | |
593 | ||
cf1d6c76 TY |
594 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
595 | return ret; | |
596 | ||
597 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
598 | if (ret < 0) { | |
599 | mlog_errno(ret); | |
600 | return ret; | |
601 | } | |
602 | ||
603 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
604 | ||
605 | down_read(&oi->ip_xattr_sem); | |
606 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
607 | if (i_ret < 0) | |
608 | b_ret = 0; | |
609 | else { | |
610 | if (buffer) { | |
611 | buffer += i_ret; | |
612 | size -= i_ret; | |
613 | } | |
614 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
615 | buffer, size); | |
616 | if (b_ret < 0) | |
617 | i_ret = 0; | |
618 | } | |
619 | up_read(&oi->ip_xattr_sem); | |
620 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
621 | ||
622 | brelse(di_bh); | |
623 | ||
624 | return i_ret + b_ret; | |
625 | } | |
626 | ||
627 | static int ocfs2_xattr_find_entry(int name_index, | |
628 | const char *name, | |
629 | struct ocfs2_xattr_search *xs) | |
630 | { | |
631 | struct ocfs2_xattr_entry *entry; | |
632 | size_t name_len; | |
633 | int i, cmp = 1; | |
634 | ||
635 | if (name == NULL) | |
636 | return -EINVAL; | |
637 | ||
638 | name_len = strlen(name); | |
639 | entry = xs->here; | |
640 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
641 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
642 | if (!cmp) | |
643 | cmp = name_len - entry->xe_name_len; | |
644 | if (!cmp) | |
645 | cmp = memcmp(name, (xs->base + | |
646 | le16_to_cpu(entry->xe_name_offset)), | |
647 | name_len); | |
648 | if (cmp == 0) | |
649 | break; | |
650 | entry += 1; | |
651 | } | |
652 | xs->here = entry; | |
653 | ||
654 | return cmp ? -ENODATA : 0; | |
655 | } | |
656 | ||
657 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 658 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
659 | void *buffer, |
660 | size_t len) | |
661 | { | |
662 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
663 | u64 blkno; | |
664 | int i, ret = 0; | |
665 | size_t cplen, blocksize; | |
666 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
667 | struct ocfs2_extent_list *el; |
668 | ||
cf1d6c76 TY |
669 | el = &xv->xr_list; |
670 | clusters = le32_to_cpu(xv->xr_clusters); | |
671 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
672 | blocksize = inode->i_sb->s_blocksize; | |
673 | ||
674 | cpos = 0; | |
675 | while (cpos < clusters) { | |
676 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
677 | &num_clusters, el); | |
678 | if (ret) { | |
679 | mlog_errno(ret); | |
680 | goto out; | |
681 | } | |
682 | ||
683 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
684 | /* Copy ocfs2_xattr_value */ | |
685 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 686 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
687 | if (ret) { |
688 | mlog_errno(ret); | |
689 | goto out; | |
690 | } | |
691 | ||
692 | cplen = len >= blocksize ? blocksize : len; | |
693 | memcpy(buffer, bh->b_data, cplen); | |
694 | len -= cplen; | |
695 | buffer += cplen; | |
696 | ||
697 | brelse(bh); | |
698 | bh = NULL; | |
699 | if (len == 0) | |
700 | break; | |
701 | } | |
702 | cpos += num_clusters; | |
703 | } | |
704 | out: | |
705 | return ret; | |
706 | } | |
707 | ||
708 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
709 | int name_index, | |
710 | const char *name, | |
711 | void *buffer, | |
712 | size_t buffer_size, | |
713 | struct ocfs2_xattr_search *xs) | |
714 | { | |
715 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
716 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 717 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
718 | size_t size; |
719 | int ret = 0; | |
720 | ||
721 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
722 | return -ENODATA; | |
723 | ||
724 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
725 | xs->header = (struct ocfs2_xattr_header *) | |
726 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
727 | xs->base = (void *)xs->header; | |
728 | xs->here = xs->header->xh_entries; | |
729 | ||
730 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
731 | if (ret) | |
732 | return ret; | |
733 | size = le64_to_cpu(xs->here->xe_value_size); | |
734 | if (buffer) { | |
735 | if (size > buffer_size) | |
736 | return -ERANGE; | |
737 | if (ocfs2_xattr_is_local(xs->here)) { | |
738 | memcpy(buffer, (void *)xs->base + | |
739 | le16_to_cpu(xs->here->xe_name_offset) + | |
740 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
741 | } else { | |
589dc260 TM |
742 | xv = (struct ocfs2_xattr_value_root *) |
743 | (xs->base + le16_to_cpu( | |
744 | xs->here->xe_name_offset) + | |
745 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
746 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
747 | buffer, size); |
748 | if (ret < 0) { | |
749 | mlog_errno(ret); | |
750 | return ret; | |
751 | } | |
752 | } | |
753 | } | |
754 | ||
755 | return size; | |
756 | } | |
757 | ||
758 | static int ocfs2_xattr_block_get(struct inode *inode, | |
759 | int name_index, | |
760 | const char *name, | |
761 | void *buffer, | |
762 | size_t buffer_size, | |
763 | struct ocfs2_xattr_search *xs) | |
764 | { | |
765 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
766 | struct buffer_head *blk_bh = NULL; | |
767 | struct ocfs2_xattr_block *xb; | |
589dc260 | 768 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 769 | size_t size; |
589dc260 | 770 | int ret = -ENODATA, name_offset, name_len, block_off, i; |
cf1d6c76 TY |
771 | |
772 | if (!di->i_xattr_loc) | |
773 | return ret; | |
774 | ||
589dc260 TM |
775 | memset(&xs->bucket, 0, sizeof(xs->bucket)); |
776 | ||
0fcaa56a | 777 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
778 | if (ret < 0) { |
779 | mlog_errno(ret); | |
780 | return ret; | |
781 | } | |
782 | /*Verify the signature of xattr block*/ | |
783 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
784 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
785 | ret = -EFAULT; | |
786 | goto cleanup; | |
787 | } | |
788 | ||
789 | xs->xattr_bh = blk_bh; | |
790 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
cf1d6c76 | 791 | |
589dc260 TM |
792 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
793 | xs->header = &xb->xb_attrs.xb_header; | |
794 | xs->base = (void *)xs->header; | |
795 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
796 | xs->here = xs->header->xh_entries; | |
797 | ||
798 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
799 | } else | |
800 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
801 | name_index, | |
802 | name, xs); | |
803 | ||
cf1d6c76 TY |
804 | if (ret) |
805 | goto cleanup; | |
806 | size = le64_to_cpu(xs->here->xe_value_size); | |
807 | if (buffer) { | |
808 | ret = -ERANGE; | |
809 | if (size > buffer_size) | |
810 | goto cleanup; | |
589dc260 TM |
811 | |
812 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
813 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
814 | i = xs->here - xs->header->xh_entries; | |
815 | ||
816 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
817 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
818 | xs->bucket.xh, | |
819 | i, | |
820 | &block_off, | |
821 | &name_offset); | |
822 | xs->base = xs->bucket.bhs[block_off]->b_data; | |
823 | } | |
cf1d6c76 TY |
824 | if (ocfs2_xattr_is_local(xs->here)) { |
825 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 826 | name_offset + name_len, size); |
cf1d6c76 | 827 | } else { |
589dc260 TM |
828 | xv = (struct ocfs2_xattr_value_root *) |
829 | (xs->base + name_offset + name_len); | |
830 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
831 | buffer, size); |
832 | if (ret < 0) { | |
833 | mlog_errno(ret); | |
834 | goto cleanup; | |
835 | } | |
836 | } | |
837 | } | |
838 | ret = size; | |
839 | cleanup: | |
589dc260 TM |
840 | for (i = 0; i < OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET; i++) |
841 | brelse(xs->bucket.bhs[i]); | |
842 | memset(&xs->bucket, 0, sizeof(xs->bucket)); | |
cf1d6c76 | 843 | |
589dc260 | 844 | brelse(blk_bh); |
cf1d6c76 TY |
845 | return ret; |
846 | } | |
847 | ||
848 | /* ocfs2_xattr_get() | |
849 | * | |
850 | * Copy an extended attribute into the buffer provided. | |
851 | * Buffer is NULL to compute the size of buffer required. | |
852 | */ | |
0030e001 TY |
853 | static int ocfs2_xattr_get(struct inode *inode, |
854 | int name_index, | |
855 | const char *name, | |
856 | void *buffer, | |
857 | size_t buffer_size) | |
cf1d6c76 TY |
858 | { |
859 | int ret; | |
860 | struct ocfs2_dinode *di = NULL; | |
861 | struct buffer_head *di_bh = NULL; | |
862 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
863 | struct ocfs2_xattr_search xis = { | |
864 | .not_found = -ENODATA, | |
865 | }; | |
866 | struct ocfs2_xattr_search xbs = { | |
867 | .not_found = -ENODATA, | |
868 | }; | |
869 | ||
8154da3d TY |
870 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
871 | return -EOPNOTSUPP; | |
872 | ||
cf1d6c76 TY |
873 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
874 | ret = -ENODATA; | |
875 | ||
876 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
877 | if (ret < 0) { | |
878 | mlog_errno(ret); | |
879 | return ret; | |
880 | } | |
881 | xis.inode_bh = xbs.inode_bh = di_bh; | |
882 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
883 | ||
884 | down_read(&oi->ip_xattr_sem); | |
885 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
886 | buffer_size, &xis); | |
887 | if (ret == -ENODATA) | |
888 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, | |
889 | buffer_size, &xbs); | |
890 | up_read(&oi->ip_xattr_sem); | |
891 | ocfs2_inode_unlock(inode, 0); | |
892 | ||
893 | brelse(di_bh); | |
894 | ||
895 | return ret; | |
896 | } | |
897 | ||
898 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
899 | struct ocfs2_xattr_value_root *xv, | |
900 | const void *value, | |
901 | int value_len) | |
902 | { | |
903 | int ret = 0, i, cp_len, credits; | |
904 | u16 blocksize = inode->i_sb->s_blocksize; | |
905 | u32 p_cluster, num_clusters; | |
906 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
907 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
908 | u64 blkno; | |
909 | struct buffer_head *bh = NULL; | |
910 | handle_t *handle; | |
911 | ||
912 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
913 | ||
914 | credits = clusters * bpc; | |
915 | handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); | |
916 | if (IS_ERR(handle)) { | |
917 | ret = PTR_ERR(handle); | |
918 | mlog_errno(ret); | |
919 | goto out; | |
920 | } | |
921 | ||
922 | while (cpos < clusters) { | |
923 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
924 | &num_clusters, &xv->xr_list); | |
925 | if (ret) { | |
926 | mlog_errno(ret); | |
927 | goto out_commit; | |
928 | } | |
929 | ||
930 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
931 | ||
932 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
0fcaa56a | 933 | ret = ocfs2_read_block(inode, blkno, &bh); |
cf1d6c76 TY |
934 | if (ret) { |
935 | mlog_errno(ret); | |
936 | goto out_commit; | |
937 | } | |
938 | ||
939 | ret = ocfs2_journal_access(handle, | |
940 | inode, | |
941 | bh, | |
942 | OCFS2_JOURNAL_ACCESS_WRITE); | |
943 | if (ret < 0) { | |
944 | mlog_errno(ret); | |
945 | goto out_commit; | |
946 | } | |
947 | ||
948 | cp_len = value_len > blocksize ? blocksize : value_len; | |
949 | memcpy(bh->b_data, value, cp_len); | |
950 | value_len -= cp_len; | |
951 | value += cp_len; | |
952 | if (cp_len < blocksize) | |
953 | memset(bh->b_data + cp_len, 0, | |
954 | blocksize - cp_len); | |
955 | ||
956 | ret = ocfs2_journal_dirty(handle, bh); | |
957 | if (ret < 0) { | |
958 | mlog_errno(ret); | |
959 | goto out_commit; | |
960 | } | |
961 | brelse(bh); | |
962 | bh = NULL; | |
963 | ||
964 | /* | |
965 | * XXX: do we need to empty all the following | |
966 | * blocks in this cluster? | |
967 | */ | |
968 | if (!value_len) | |
969 | break; | |
970 | } | |
971 | cpos += num_clusters; | |
972 | } | |
973 | out_commit: | |
974 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
975 | out: | |
976 | brelse(bh); | |
977 | ||
978 | return ret; | |
979 | } | |
980 | ||
981 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
982 | struct ocfs2_xattr_info *xi, | |
983 | struct ocfs2_xattr_search *xs, | |
984 | size_t offs) | |
985 | { | |
986 | handle_t *handle = NULL; | |
987 | int ret = 0; | |
988 | size_t name_len = strlen(xi->name); | |
989 | void *val = xs->base + offs; | |
990 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
991 | ||
992 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
993 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
994 | if (IS_ERR(handle)) { | |
995 | ret = PTR_ERR(handle); | |
996 | mlog_errno(ret); | |
997 | goto out; | |
998 | } | |
999 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1000 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1001 | if (ret) { | |
1002 | mlog_errno(ret); | |
1003 | goto out_commit; | |
1004 | } | |
1005 | /* Decrease xattr count */ | |
1006 | le16_add_cpu(&xs->header->xh_count, -1); | |
1007 | /* Remove the xattr entry and tree root which has already be set*/ | |
1008 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1009 | memset(val, 0, size); | |
1010 | ||
1011 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1012 | if (ret < 0) | |
1013 | mlog_errno(ret); | |
1014 | out_commit: | |
1015 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1016 | out: | |
1017 | return ret; | |
1018 | } | |
1019 | ||
1020 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
1021 | struct ocfs2_xattr_info *xi, | |
1022 | struct ocfs2_xattr_search *xs, | |
1023 | size_t offs) | |
1024 | { | |
1025 | handle_t *handle = NULL; | |
1026 | int ret = 0; | |
1027 | ||
1028 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1029 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1030 | if (IS_ERR(handle)) { | |
1031 | ret = PTR_ERR(handle); | |
1032 | mlog_errno(ret); | |
1033 | goto out; | |
1034 | } | |
1035 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1036 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1037 | if (ret) { | |
1038 | mlog_errno(ret); | |
1039 | goto out_commit; | |
1040 | } | |
1041 | ||
1042 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1043 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1044 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1045 | ocfs2_xattr_set_local(xs->here, 1); | |
1046 | else | |
1047 | ocfs2_xattr_set_local(xs->here, 0); | |
1048 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1049 | ||
1050 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1051 | if (ret < 0) | |
1052 | mlog_errno(ret); | |
1053 | out_commit: | |
1054 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1055 | out: | |
1056 | return ret; | |
1057 | } | |
1058 | ||
1059 | /* | |
1060 | * ocfs2_xattr_set_value_outside() | |
1061 | * | |
1062 | * Set large size value in B tree. | |
1063 | */ | |
1064 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1065 | struct ocfs2_xattr_info *xi, | |
1066 | struct ocfs2_xattr_search *xs, | |
1067 | size_t offs) | |
1068 | { | |
1069 | size_t name_len = strlen(xi->name); | |
1070 | void *val = xs->base + offs; | |
1071 | struct ocfs2_xattr_value_root *xv = NULL; | |
1072 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1073 | int ret = 0; | |
1074 | ||
1075 | memset(val, 0, size); | |
1076 | memcpy(val, xi->name, name_len); | |
1077 | xv = (struct ocfs2_xattr_value_root *) | |
1078 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1079 | xv->xr_clusters = 0; | |
1080 | xv->xr_last_eb_blk = 0; | |
1081 | xv->xr_list.l_tree_depth = 0; | |
1082 | xv->xr_list.l_count = cpu_to_le16(1); | |
1083 | xv->xr_list.l_next_free_rec = 0; | |
1084 | ||
1085 | ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
1086 | xi->value_len); | |
1087 | if (ret < 0) { | |
1088 | mlog_errno(ret); | |
1089 | return ret; | |
1090 | } | |
1091 | ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, | |
1092 | xi->value_len); | |
1093 | if (ret < 0) { | |
1094 | mlog_errno(ret); | |
1095 | return ret; | |
1096 | } | |
1097 | ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); | |
1098 | if (ret < 0) | |
1099 | mlog_errno(ret); | |
1100 | ||
1101 | return ret; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * ocfs2_xattr_set_entry_local() | |
1106 | * | |
1107 | * Set, replace or remove extended attribute in local. | |
1108 | */ | |
1109 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1110 | struct ocfs2_xattr_info *xi, | |
1111 | struct ocfs2_xattr_search *xs, | |
1112 | struct ocfs2_xattr_entry *last, | |
1113 | size_t min_offs) | |
1114 | { | |
1115 | size_t name_len = strlen(xi->name); | |
1116 | int i; | |
1117 | ||
1118 | if (xi->value && xs->not_found) { | |
1119 | /* Insert the new xattr entry. */ | |
1120 | le16_add_cpu(&xs->header->xh_count, 1); | |
1121 | ocfs2_xattr_set_type(last, xi->name_index); | |
1122 | ocfs2_xattr_set_local(last, 1); | |
1123 | last->xe_name_len = name_len; | |
1124 | } else { | |
1125 | void *first_val; | |
1126 | void *val; | |
1127 | size_t offs, size; | |
1128 | ||
1129 | first_val = xs->base + min_offs; | |
1130 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1131 | val = xs->base + offs; | |
1132 | ||
1133 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1134 | OCFS2_XATTR_INLINE_SIZE) | |
1135 | size = OCFS2_XATTR_SIZE(name_len) + | |
1136 | OCFS2_XATTR_ROOT_SIZE; | |
1137 | else | |
1138 | size = OCFS2_XATTR_SIZE(name_len) + | |
1139 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1140 | ||
1141 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1142 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1143 | /* The old and the new value have the | |
1144 | same size. Just replace the value. */ | |
1145 | ocfs2_xattr_set_local(xs->here, 1); | |
1146 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1147 | /* Clear value bytes. */ | |
1148 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1149 | 0, | |
1150 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1151 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1152 | xi->value, | |
1153 | xi->value_len); | |
1154 | return; | |
1155 | } | |
1156 | /* Remove the old name+value. */ | |
1157 | memmove(first_val + size, first_val, val - first_val); | |
1158 | memset(first_val, 0, size); | |
1159 | xs->here->xe_name_hash = 0; | |
1160 | xs->here->xe_name_offset = 0; | |
1161 | ocfs2_xattr_set_local(xs->here, 1); | |
1162 | xs->here->xe_value_size = 0; | |
1163 | ||
1164 | min_offs += size; | |
1165 | ||
1166 | /* Adjust all value offsets. */ | |
1167 | last = xs->header->xh_entries; | |
1168 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1169 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1170 | ||
1171 | if (o < offs) | |
1172 | last->xe_name_offset = cpu_to_le16(o + size); | |
1173 | last += 1; | |
1174 | } | |
1175 | ||
1176 | if (!xi->value) { | |
1177 | /* Remove the old entry. */ | |
1178 | last -= 1; | |
1179 | memmove(xs->here, xs->here + 1, | |
1180 | (void *)last - (void *)xs->here); | |
1181 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1182 | le16_add_cpu(&xs->header->xh_count, -1); | |
1183 | } | |
1184 | } | |
1185 | if (xi->value) { | |
1186 | /* Insert the new name+value. */ | |
1187 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1188 | OCFS2_XATTR_SIZE(xi->value_len); | |
1189 | void *val = xs->base + min_offs - size; | |
1190 | ||
1191 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1192 | memset(val, 0, size); | |
1193 | memcpy(val, xi->name, name_len); | |
1194 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1195 | xi->value, | |
1196 | xi->value_len); | |
1197 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1198 | ocfs2_xattr_set_local(xs->here, 1); | |
1199 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1200 | } | |
1201 | ||
1202 | return; | |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * ocfs2_xattr_set_entry() | |
1207 | * | |
1208 | * Set extended attribute entry into inode or block. | |
1209 | * | |
1210 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1211 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1212 | * then set value in B tree with set_value_outside(). | |
1213 | */ | |
1214 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1215 | struct ocfs2_xattr_info *xi, | |
1216 | struct ocfs2_xattr_search *xs, | |
1217 | int flag) | |
1218 | { | |
1219 | struct ocfs2_xattr_entry *last; | |
1220 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1221 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1222 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1223 | size_t size_l = 0; | |
1224 | handle_t *handle = NULL; | |
1225 | int free, i, ret; | |
1226 | struct ocfs2_xattr_info xi_l = { | |
1227 | .name_index = xi->name_index, | |
1228 | .name = xi->name, | |
1229 | .value = xi->value, | |
1230 | .value_len = xi->value_len, | |
1231 | }; | |
1232 | ||
1233 | /* Compute min_offs, last and free space. */ | |
1234 | last = xs->header->xh_entries; | |
1235 | ||
1236 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1237 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1238 | if (offs < min_offs) | |
1239 | min_offs = offs; | |
1240 | last += 1; | |
1241 | } | |
1242 | ||
1243 | free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1244 | if (free < 0) | |
1245 | return -EFAULT; | |
1246 | ||
1247 | if (!xs->not_found) { | |
1248 | size_t size = 0; | |
1249 | if (ocfs2_xattr_is_local(xs->here)) | |
1250 | size = OCFS2_XATTR_SIZE(name_len) + | |
1251 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1252 | else | |
1253 | size = OCFS2_XATTR_SIZE(name_len) + | |
1254 | OCFS2_XATTR_ROOT_SIZE; | |
1255 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1256 | } | |
1257 | /* Check free space in inode or block */ | |
1258 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1259 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1260 | OCFS2_XATTR_SIZE(name_len) + | |
1261 | OCFS2_XATTR_ROOT_SIZE) { | |
1262 | ret = -ENOSPC; | |
1263 | goto out; | |
1264 | } | |
1265 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1266 | xi_l.value = (void *)&def_xv; | |
1267 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1268 | } else if (xi->value) { | |
1269 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1270 | OCFS2_XATTR_SIZE(name_len) + | |
1271 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1272 | ret = -ENOSPC; | |
1273 | goto out; | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | if (!xs->not_found) { | |
1278 | /* For existing extended attribute */ | |
1279 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1280 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1281 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1282 | void *val = xs->base + offs; | |
1283 | ||
1284 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1285 | /* Replace existing local xattr with tree root */ | |
1286 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
1287 | offs); | |
1288 | if (ret < 0) | |
1289 | mlog_errno(ret); | |
1290 | goto out; | |
1291 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1292 | /* For existing xattr which has value outside */ | |
1293 | struct ocfs2_xattr_value_root *xv = NULL; | |
1294 | xv = (struct ocfs2_xattr_value_root *)(val + | |
1295 | OCFS2_XATTR_SIZE(name_len)); | |
1296 | ||
1297 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1298 | /* | |
1299 | * If new value need set outside also, | |
1300 | * first truncate old value to new value, | |
1301 | * then set new value with set_value_outside(). | |
1302 | */ | |
1303 | ret = ocfs2_xattr_value_truncate(inode, | |
1304 | xs->xattr_bh, | |
1305 | xv, | |
1306 | xi->value_len); | |
1307 | if (ret < 0) { | |
1308 | mlog_errno(ret); | |
1309 | goto out; | |
1310 | } | |
1311 | ||
1312 | ret = __ocfs2_xattr_set_value_outside(inode, | |
1313 | xv, | |
1314 | xi->value, | |
1315 | xi->value_len); | |
1316 | if (ret < 0) { | |
1317 | mlog_errno(ret); | |
1318 | goto out; | |
1319 | } | |
1320 | ||
1321 | ret = ocfs2_xattr_update_entry(inode, | |
1322 | xi, | |
1323 | xs, | |
1324 | offs); | |
1325 | if (ret < 0) | |
1326 | mlog_errno(ret); | |
1327 | goto out; | |
1328 | } else { | |
1329 | /* | |
1330 | * If new value need set in local, | |
1331 | * just trucate old value to zero. | |
1332 | */ | |
1333 | ret = ocfs2_xattr_value_truncate(inode, | |
1334 | xs->xattr_bh, | |
1335 | xv, | |
1336 | 0); | |
1337 | if (ret < 0) | |
1338 | mlog_errno(ret); | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1344 | OCFS2_INODE_UPDATE_CREDITS); | |
1345 | if (IS_ERR(handle)) { | |
1346 | ret = PTR_ERR(handle); | |
1347 | mlog_errno(ret); | |
1348 | goto out; | |
1349 | } | |
1350 | ||
1351 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1352 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1353 | if (ret) { | |
1354 | mlog_errno(ret); | |
1355 | goto out_commit; | |
1356 | } | |
1357 | ||
1358 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
28b8ca0b | 1359 | /* set extended attribute in external block. */ |
cf1d6c76 | 1360 | ret = ocfs2_extend_trans(handle, |
28b8ca0b | 1361 | OCFS2_INODE_UPDATE_CREDITS + |
cf1d6c76 TY |
1362 | OCFS2_XATTR_BLOCK_UPDATE_CREDITS); |
1363 | if (ret) { | |
1364 | mlog_errno(ret); | |
1365 | goto out_commit; | |
1366 | } | |
1367 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1368 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1369 | if (ret) { | |
1370 | mlog_errno(ret); | |
1371 | goto out_commit; | |
1372 | } | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * Set value in local, include set tree root in local. | |
1377 | * This is the first step for value size >INLINE_SIZE. | |
1378 | */ | |
1379 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1380 | ||
1381 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1382 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1383 | if (ret < 0) { | |
1384 | mlog_errno(ret); | |
1385 | goto out_commit; | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1390 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1391 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1392 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1393 | ||
1394 | /* | |
1395 | * Adjust extent record count or inline data size | |
1396 | * to reserve space for extended attribute. | |
1397 | */ | |
1398 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1399 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1400 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1401 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1402 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1403 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1404 | sizeof(struct ocfs2_extent_rec))); | |
1405 | } | |
1406 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1407 | } | |
1408 | /* Update xattr flag */ | |
1409 | spin_lock(&oi->ip_lock); | |
1410 | oi->ip_dyn_features |= flag; | |
1411 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1412 | spin_unlock(&oi->ip_lock); | |
1413 | /* Update inode ctime */ | |
1414 | inode->i_ctime = CURRENT_TIME; | |
1415 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1416 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1417 | ||
1418 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1419 | if (ret < 0) | |
1420 | mlog_errno(ret); | |
1421 | ||
1422 | out_commit: | |
1423 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1424 | ||
1425 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1426 | /* | |
1427 | * Set value outside in B tree. | |
1428 | * This is the second step for value size > INLINE_SIZE. | |
1429 | */ | |
1430 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1431 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs); | |
1432 | if (ret < 0) { | |
1433 | int ret2; | |
1434 | ||
1435 | mlog_errno(ret); | |
1436 | /* | |
1437 | * If set value outside failed, we have to clean | |
1438 | * the junk tree root we have already set in local. | |
1439 | */ | |
1440 | ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs); | |
1441 | if (ret2 < 0) | |
1442 | mlog_errno(ret2); | |
1443 | } | |
1444 | } | |
1445 | out: | |
1446 | return ret; | |
1447 | ||
1448 | } | |
1449 | ||
cf1d6c76 TY |
1450 | static int ocfs2_remove_value_outside(struct inode*inode, |
1451 | struct buffer_head *bh, | |
1452 | struct ocfs2_xattr_header *header) | |
1453 | { | |
1454 | int ret = 0, i; | |
1455 | ||
1456 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1457 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1458 | ||
1459 | if (!ocfs2_xattr_is_local(entry)) { | |
1460 | struct ocfs2_xattr_value_root *xv; | |
1461 | void *val; | |
1462 | ||
1463 | val = (void *)header + | |
1464 | le16_to_cpu(entry->xe_name_offset); | |
1465 | xv = (struct ocfs2_xattr_value_root *) | |
1466 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1467 | ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0); | |
1468 | if (ret < 0) { | |
1469 | mlog_errno(ret); | |
1470 | return ret; | |
1471 | } | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | return ret; | |
1476 | } | |
1477 | ||
1478 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1479 | struct buffer_head *di_bh) | |
1480 | { | |
1481 | ||
1482 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1483 | struct ocfs2_xattr_header *header; | |
1484 | int ret; | |
1485 | ||
1486 | header = (struct ocfs2_xattr_header *) | |
1487 | ((void *)di + inode->i_sb->s_blocksize - | |
1488 | le16_to_cpu(di->i_xattr_inline_size)); | |
1489 | ||
1490 | ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1491 | ||
1492 | return ret; | |
1493 | } | |
1494 | ||
1495 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1496 | struct buffer_head *blk_bh) | |
1497 | { | |
1498 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 TY |
1499 | int ret = 0; |
1500 | ||
1501 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1502 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1503 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
1504 | ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1505 | } else | |
1506 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1507 | |
1508 | return ret; | |
1509 | } | |
1510 | ||
08413899 TM |
1511 | static int ocfs2_xattr_free_block(struct inode *inode, |
1512 | u64 block) | |
1513 | { | |
1514 | struct inode *xb_alloc_inode; | |
1515 | struct buffer_head *xb_alloc_bh = NULL; | |
1516 | struct buffer_head *blk_bh = NULL; | |
1517 | struct ocfs2_xattr_block *xb; | |
1518 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1519 | handle_t *handle; | |
1520 | int ret = 0; | |
1521 | u64 blk, bg_blkno; | |
1522 | u16 bit; | |
1523 | ||
0fcaa56a | 1524 | ret = ocfs2_read_block(inode, block, &blk_bh); |
08413899 TM |
1525 | if (ret < 0) { |
1526 | mlog_errno(ret); | |
1527 | goto out; | |
1528 | } | |
1529 | ||
1530 | /*Verify the signature of xattr block*/ | |
1531 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
1532 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
1533 | ret = -EFAULT; | |
1534 | goto out; | |
1535 | } | |
1536 | ||
1537 | ret = ocfs2_xattr_block_remove(inode, blk_bh); | |
1538 | if (ret < 0) { | |
1539 | mlog_errno(ret); | |
1540 | goto out; | |
1541 | } | |
1542 | ||
1543 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1544 | blk = le64_to_cpu(xb->xb_blkno); | |
1545 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1546 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1547 | ||
1548 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1549 | EXTENT_ALLOC_SYSTEM_INODE, | |
1550 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1551 | if (!xb_alloc_inode) { | |
1552 | ret = -ENOMEM; | |
1553 | mlog_errno(ret); | |
1554 | goto out; | |
1555 | } | |
1556 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1557 | ||
1558 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1559 | if (ret < 0) { | |
1560 | mlog_errno(ret); | |
1561 | goto out_mutex; | |
1562 | } | |
1563 | ||
1564 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1565 | if (IS_ERR(handle)) { | |
1566 | ret = PTR_ERR(handle); | |
1567 | mlog_errno(ret); | |
1568 | goto out_unlock; | |
1569 | } | |
1570 | ||
1571 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1572 | bit, bg_blkno, 1); | |
1573 | if (ret < 0) | |
1574 | mlog_errno(ret); | |
1575 | ||
1576 | ocfs2_commit_trans(osb, handle); | |
1577 | out_unlock: | |
1578 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1579 | brelse(xb_alloc_bh); | |
1580 | out_mutex: | |
1581 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1582 | iput(xb_alloc_inode); | |
1583 | out: | |
1584 | brelse(blk_bh); | |
1585 | return ret; | |
1586 | } | |
1587 | ||
cf1d6c76 TY |
1588 | /* |
1589 | * ocfs2_xattr_remove() | |
1590 | * | |
1591 | * Free extended attribute resources associated with this inode. | |
1592 | */ | |
1593 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1594 | { | |
cf1d6c76 TY |
1595 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1596 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1597 | handle_t *handle; | |
1598 | int ret; | |
1599 | ||
8154da3d TY |
1600 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1601 | return 0; | |
1602 | ||
cf1d6c76 TY |
1603 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1604 | return 0; | |
1605 | ||
1606 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1607 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1608 | if (ret < 0) { | |
1609 | mlog_errno(ret); | |
1610 | goto out; | |
1611 | } | |
1612 | } | |
cf1d6c76 | 1613 | |
08413899 TM |
1614 | if (di->i_xattr_loc) { |
1615 | ret = ocfs2_xattr_free_block(inode, | |
1616 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1617 | if (ret < 0) { |
1618 | mlog_errno(ret); | |
1619 | goto out; | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1624 | OCFS2_INODE_UPDATE_CREDITS); | |
1625 | if (IS_ERR(handle)) { | |
1626 | ret = PTR_ERR(handle); | |
1627 | mlog_errno(ret); | |
1628 | goto out; | |
1629 | } | |
1630 | ret = ocfs2_journal_access(handle, inode, di_bh, | |
1631 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1632 | if (ret) { | |
1633 | mlog_errno(ret); | |
1634 | goto out_commit; | |
1635 | } | |
1636 | ||
08413899 | 1637 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1638 | |
1639 | spin_lock(&oi->ip_lock); | |
1640 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1641 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1642 | spin_unlock(&oi->ip_lock); | |
1643 | ||
1644 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1645 | if (ret < 0) | |
1646 | mlog_errno(ret); | |
1647 | out_commit: | |
1648 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1649 | out: | |
cf1d6c76 TY |
1650 | return ret; |
1651 | } | |
1652 | ||
1653 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1654 | struct ocfs2_dinode *di) | |
1655 | { | |
1656 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1657 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1658 | int free; | |
1659 | ||
1660 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1661 | return 0; | |
1662 | ||
1663 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1664 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1665 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1666 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1667 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1668 | le64_to_cpu(di->i_size); | |
1669 | } else { | |
1670 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1671 | free = (le16_to_cpu(el->l_count) - | |
1672 | le16_to_cpu(el->l_next_free_rec)) * | |
1673 | sizeof(struct ocfs2_extent_rec); | |
1674 | } | |
1675 | if (free >= xattrsize) | |
1676 | return 1; | |
1677 | ||
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | * ocfs2_xattr_ibody_find() | |
1683 | * | |
1684 | * Find extended attribute in inode block and | |
1685 | * fill search info into struct ocfs2_xattr_search. | |
1686 | */ | |
1687 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1688 | int name_index, | |
1689 | const char *name, | |
1690 | struct ocfs2_xattr_search *xs) | |
1691 | { | |
1692 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1693 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1694 | int ret; | |
1695 | int has_space = 0; | |
1696 | ||
1697 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1698 | return 0; | |
1699 | ||
1700 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1701 | down_read(&oi->ip_alloc_sem); | |
1702 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1703 | up_read(&oi->ip_alloc_sem); | |
1704 | if (!has_space) | |
1705 | return 0; | |
1706 | } | |
1707 | ||
1708 | xs->xattr_bh = xs->inode_bh; | |
1709 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1710 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1711 | xs->header = (struct ocfs2_xattr_header *) | |
1712 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1713 | else | |
1714 | xs->header = (struct ocfs2_xattr_header *) | |
1715 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1716 | xs->base = (void *)xs->header; | |
1717 | xs->here = xs->header->xh_entries; | |
1718 | ||
1719 | /* Find the named attribute. */ | |
1720 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1721 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1722 | if (ret && ret != -ENODATA) | |
1723 | return ret; | |
1724 | xs->not_found = ret; | |
1725 | } | |
1726 | ||
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * ocfs2_xattr_ibody_set() | |
1732 | * | |
1733 | * Set, replace or remove an extended attribute into inode block. | |
1734 | * | |
1735 | */ | |
1736 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
1737 | struct ocfs2_xattr_info *xi, | |
1738 | struct ocfs2_xattr_search *xs) | |
1739 | { | |
1740 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1741 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1742 | int ret; | |
1743 | ||
1744 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1745 | return -ENOSPC; | |
1746 | ||
1747 | down_write(&oi->ip_alloc_sem); | |
1748 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1749 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
1750 | ret = -ENOSPC; | |
1751 | goto out; | |
1752 | } | |
1753 | } | |
1754 | ||
1755 | ret = ocfs2_xattr_set_entry(inode, xi, xs, | |
1756 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); | |
1757 | out: | |
1758 | up_write(&oi->ip_alloc_sem); | |
1759 | ||
1760 | return ret; | |
1761 | } | |
1762 | ||
1763 | /* | |
1764 | * ocfs2_xattr_block_find() | |
1765 | * | |
1766 | * Find extended attribute in external block and | |
1767 | * fill search info into struct ocfs2_xattr_search. | |
1768 | */ | |
1769 | static int ocfs2_xattr_block_find(struct inode *inode, | |
1770 | int name_index, | |
1771 | const char *name, | |
1772 | struct ocfs2_xattr_search *xs) | |
1773 | { | |
1774 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1775 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 1776 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1777 | int ret = 0; |
1778 | ||
1779 | if (!di->i_xattr_loc) | |
1780 | return ret; | |
1781 | ||
0fcaa56a | 1782 | ret = ocfs2_read_block(inode, le64_to_cpu(di->i_xattr_loc), &blk_bh); |
cf1d6c76 TY |
1783 | if (ret < 0) { |
1784 | mlog_errno(ret); | |
1785 | return ret; | |
1786 | } | |
1787 | /*Verify the signature of xattr block*/ | |
1788 | if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
1789 | strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
1790 | ret = -EFAULT; | |
1791 | goto cleanup; | |
1792 | } | |
1793 | ||
1794 | xs->xattr_bh = blk_bh; | |
589dc260 TM |
1795 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
1796 | ||
1797 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1798 | xs->header = &xb->xb_attrs.xb_header; | |
1799 | xs->base = (void *)xs->header; | |
1800 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
1801 | xs->here = xs->header->xh_entries; | |
1802 | ||
1803 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1804 | } else | |
1805 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
1806 | name_index, | |
1807 | name, xs); | |
cf1d6c76 | 1808 | |
cf1d6c76 TY |
1809 | if (ret && ret != -ENODATA) { |
1810 | xs->xattr_bh = NULL; | |
1811 | goto cleanup; | |
1812 | } | |
1813 | xs->not_found = ret; | |
1814 | return 0; | |
cf1d6c76 TY |
1815 | cleanup: |
1816 | brelse(blk_bh); | |
1817 | ||
1818 | return ret; | |
1819 | } | |
1820 | ||
01225596 TM |
1821 | /* |
1822 | * When all the xattrs are deleted from index btree, the ocfs2_xattr_tree | |
1823 | * will be erased and ocfs2_xattr_block will have its ocfs2_xattr_header | |
1824 | * re-initialized. | |
1825 | */ | |
1826 | static int ocfs2_restore_xattr_block(struct inode *inode, | |
1827 | struct ocfs2_xattr_search *xs) | |
1828 | { | |
1829 | int ret; | |
1830 | handle_t *handle; | |
1831 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1832 | struct ocfs2_xattr_block *xb = | |
1833 | (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
1834 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
1835 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
1836 | ||
1837 | BUG_ON(!(xb_flags & OCFS2_XATTR_INDEXED) || | |
1838 | le16_to_cpu(el->l_next_free_rec) != 0); | |
1839 | ||
1840 | handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1841 | if (IS_ERR(handle)) { | |
1842 | ret = PTR_ERR(handle); | |
1843 | handle = NULL; | |
1844 | goto out; | |
1845 | } | |
1846 | ||
1847 | ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1848 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1849 | if (ret < 0) { | |
1850 | mlog_errno(ret); | |
1851 | goto out_commit; | |
1852 | } | |
1853 | ||
1854 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
1855 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
1856 | ||
1857 | xb->xb_flags = cpu_to_le16(xb_flags & ~OCFS2_XATTR_INDEXED); | |
1858 | ||
1859 | ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1860 | ||
1861 | out_commit: | |
1862 | ocfs2_commit_trans(osb, handle); | |
1863 | out: | |
1864 | return ret; | |
1865 | } | |
1866 | ||
cf1d6c76 TY |
1867 | /* |
1868 | * ocfs2_xattr_block_set() | |
1869 | * | |
1870 | * Set, replace or remove an extended attribute into external block. | |
1871 | * | |
1872 | */ | |
1873 | static int ocfs2_xattr_block_set(struct inode *inode, | |
1874 | struct ocfs2_xattr_info *xi, | |
1875 | struct ocfs2_xattr_search *xs) | |
1876 | { | |
1877 | struct buffer_head *new_bh = NULL; | |
1878 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1879 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1880 | struct ocfs2_alloc_context *meta_ac = NULL; | |
1881 | handle_t *handle = NULL; | |
1882 | struct ocfs2_xattr_block *xblk = NULL; | |
1883 | u16 suballoc_bit_start; | |
1884 | u32 num_got; | |
1885 | u64 first_blkno; | |
1886 | int ret; | |
1887 | ||
1888 | if (!xs->xattr_bh) { | |
1889 | /* | |
1890 | * Alloc one external block for extended attribute | |
1891 | * outside of inode. | |
1892 | */ | |
1893 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
1894 | if (ret < 0) { | |
1895 | mlog_errno(ret); | |
1896 | goto out; | |
1897 | } | |
1898 | handle = ocfs2_start_trans(osb, | |
1899 | OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
1900 | if (IS_ERR(handle)) { | |
1901 | ret = PTR_ERR(handle); | |
1902 | mlog_errno(ret); | |
1903 | goto out; | |
1904 | } | |
1905 | ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1906 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1907 | if (ret < 0) { | |
1908 | mlog_errno(ret); | |
1909 | goto out_commit; | |
1910 | } | |
1911 | ||
1912 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
1913 | &suballoc_bit_start, &num_got, | |
1914 | &first_blkno); | |
1915 | if (ret < 0) { | |
1916 | mlog_errno(ret); | |
1917 | goto out_commit; | |
1918 | } | |
1919 | ||
1920 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
1921 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
1922 | ||
1923 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
1924 | OCFS2_JOURNAL_ACCESS_CREATE); | |
1925 | if (ret < 0) { | |
1926 | mlog_errno(ret); | |
1927 | goto out_commit; | |
1928 | } | |
1929 | ||
1930 | /* Initialize ocfs2_xattr_block */ | |
1931 | xs->xattr_bh = new_bh; | |
1932 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
1933 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
1934 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
1935 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
1936 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
1937 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
1938 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
1939 | ||
1940 | xs->header = &xblk->xb_attrs.xb_header; | |
1941 | xs->base = (void *)xs->header; | |
1942 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
1943 | xs->here = xs->header->xh_entries; | |
1944 | ||
1945 | ||
1946 | ret = ocfs2_journal_dirty(handle, new_bh); | |
1947 | if (ret < 0) { | |
1948 | mlog_errno(ret); | |
1949 | goto out_commit; | |
1950 | } | |
1951 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
1952 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1953 | if (ret < 0) | |
1954 | mlog_errno(ret); | |
1955 | out_commit: | |
1956 | ocfs2_commit_trans(osb, handle); | |
1957 | out: | |
1958 | if (meta_ac) | |
1959 | ocfs2_free_alloc_context(meta_ac); | |
1960 | if (ret < 0) | |
1961 | return ret; | |
01225596 TM |
1962 | } else |
1963 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
1964 | ||
1965 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
1966 | /* Set extended attribute into external block */ | |
1967 | ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL); | |
1968 | if (!ret || ret != -ENOSPC) | |
1969 | goto end; | |
1970 | ||
1971 | ret = ocfs2_xattr_create_index_block(inode, xs); | |
1972 | if (ret) | |
1973 | goto end; | |
cf1d6c76 TY |
1974 | } |
1975 | ||
01225596 TM |
1976 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs); |
1977 | if (!ret && xblk->xb_attrs.xb_root.xt_list.l_next_free_rec == 0) | |
1978 | ret = ocfs2_restore_xattr_block(inode, xs); | |
1979 | ||
1980 | end: | |
cf1d6c76 TY |
1981 | |
1982 | return ret; | |
1983 | } | |
1984 | ||
1985 | /* | |
1986 | * ocfs2_xattr_set() | |
1987 | * | |
1988 | * Set, replace or remove an extended attribute for this inode. | |
1989 | * value is NULL to remove an existing extended attribute, else either | |
1990 | * create or replace an extended attribute. | |
1991 | */ | |
1992 | int ocfs2_xattr_set(struct inode *inode, | |
1993 | int name_index, | |
1994 | const char *name, | |
1995 | const void *value, | |
1996 | size_t value_len, | |
1997 | int flags) | |
1998 | { | |
1999 | struct buffer_head *di_bh = NULL; | |
2000 | struct ocfs2_dinode *di; | |
2001 | int ret; | |
01225596 | 2002 | u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
cf1d6c76 TY |
2003 | |
2004 | struct ocfs2_xattr_info xi = { | |
2005 | .name_index = name_index, | |
2006 | .name = name, | |
2007 | .value = value, | |
2008 | .value_len = value_len, | |
2009 | }; | |
2010 | ||
2011 | struct ocfs2_xattr_search xis = { | |
2012 | .not_found = -ENODATA, | |
2013 | }; | |
2014 | ||
2015 | struct ocfs2_xattr_search xbs = { | |
2016 | .not_found = -ENODATA, | |
2017 | }; | |
2018 | ||
8154da3d TY |
2019 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2020 | return -EOPNOTSUPP; | |
2021 | ||
cf1d6c76 TY |
2022 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2023 | if (ret < 0) { | |
2024 | mlog_errno(ret); | |
2025 | return ret; | |
2026 | } | |
2027 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2028 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2029 | ||
2030 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2031 | /* | |
2032 | * Scan inode and external block to find the same name | |
2033 | * extended attribute and collect search infomation. | |
2034 | */ | |
2035 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2036 | if (ret) | |
2037 | goto cleanup; | |
2038 | if (xis.not_found) { | |
2039 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2040 | if (ret) | |
2041 | goto cleanup; | |
2042 | } | |
2043 | ||
2044 | if (xis.not_found && xbs.not_found) { | |
2045 | ret = -ENODATA; | |
2046 | if (flags & XATTR_REPLACE) | |
2047 | goto cleanup; | |
2048 | ret = 0; | |
2049 | if (!value) | |
2050 | goto cleanup; | |
2051 | } else { | |
2052 | ret = -EEXIST; | |
2053 | if (flags & XATTR_CREATE) | |
2054 | goto cleanup; | |
2055 | } | |
2056 | ||
2057 | if (!value) { | |
2058 | /* Remove existing extended attribute */ | |
2059 | if (!xis.not_found) | |
2060 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2061 | else if (!xbs.not_found) | |
2062 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2063 | } else { | |
2064 | /* We always try to set extended attribute into inode first*/ | |
2065 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2066 | if (!ret && !xbs.not_found) { | |
2067 | /* | |
2068 | * If succeed and that extended attribute existing in | |
2069 | * external block, then we will remove it. | |
2070 | */ | |
2071 | xi.value = NULL; | |
2072 | xi.value_len = 0; | |
2073 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2074 | } else if (ret == -ENOSPC) { | |
2075 | if (di->i_xattr_loc && !xbs.xattr_bh) { | |
2076 | ret = ocfs2_xattr_block_find(inode, name_index, | |
2077 | name, &xbs); | |
2078 | if (ret) | |
2079 | goto cleanup; | |
2080 | } | |
2081 | /* | |
2082 | * If no space in inode, we will set extended attribute | |
2083 | * into external block. | |
2084 | */ | |
2085 | ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
2086 | if (ret) | |
2087 | goto cleanup; | |
2088 | if (!xis.not_found) { | |
2089 | /* | |
2090 | * If succeed and that extended attribute | |
2091 | * existing in inode, we will remove it. | |
2092 | */ | |
2093 | xi.value = NULL; | |
2094 | xi.value_len = 0; | |
2095 | ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
2096 | } | |
2097 | } | |
2098 | } | |
2099 | cleanup: | |
2100 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2101 | ocfs2_inode_unlock(inode, 1); | |
2102 | brelse(di_bh); | |
2103 | brelse(xbs.xattr_bh); | |
01225596 TM |
2104 | for (i = 0; i < blk_per_bucket; i++) |
2105 | brelse(xbs.bucket.bhs[i]); | |
cf1d6c76 TY |
2106 | |
2107 | return ret; | |
2108 | } | |
2109 | ||
0c044f0b TM |
2110 | /* |
2111 | * Find the xattr extent rec which may contains name_hash. | |
2112 | * e_cpos will be the first name hash of the xattr rec. | |
2113 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2114 | */ | |
2115 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2116 | u32 name_hash, | |
2117 | u64 *p_blkno, | |
2118 | u32 *e_cpos, | |
2119 | u32 *num_clusters, | |
2120 | struct ocfs2_extent_list *el) | |
2121 | { | |
2122 | int ret = 0, i; | |
2123 | struct buffer_head *eb_bh = NULL; | |
2124 | struct ocfs2_extent_block *eb; | |
2125 | struct ocfs2_extent_rec *rec = NULL; | |
2126 | u64 e_blkno = 0; | |
2127 | ||
2128 | if (el->l_tree_depth) { | |
2129 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2130 | if (ret) { | |
2131 | mlog_errno(ret); | |
2132 | goto out; | |
2133 | } | |
2134 | ||
2135 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2136 | el = &eb->h_list; | |
2137 | ||
2138 | if (el->l_tree_depth) { | |
2139 | ocfs2_error(inode->i_sb, | |
2140 | "Inode %lu has non zero tree depth in " | |
2141 | "xattr tree block %llu\n", inode->i_ino, | |
2142 | (unsigned long long)eb_bh->b_blocknr); | |
2143 | ret = -EROFS; | |
2144 | goto out; | |
2145 | } | |
2146 | } | |
2147 | ||
2148 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2149 | rec = &el->l_recs[i]; | |
2150 | ||
2151 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2152 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2153 | break; | |
2154 | } | |
2155 | } | |
2156 | ||
2157 | if (!e_blkno) { | |
2158 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2159 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2160 | le32_to_cpu(rec->e_cpos), | |
2161 | ocfs2_rec_clusters(el, rec)); | |
2162 | ret = -EROFS; | |
2163 | goto out; | |
2164 | } | |
2165 | ||
2166 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2167 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2168 | if (e_cpos) | |
2169 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2170 | out: | |
2171 | brelse(eb_bh); | |
2172 | return ret; | |
2173 | } | |
2174 | ||
2175 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2176 | struct ocfs2_xattr_bucket *bucket, | |
2177 | void *para); | |
2178 | ||
589dc260 TM |
2179 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
2180 | struct buffer_head *header_bh, | |
2181 | int name_index, | |
2182 | const char *name, | |
2183 | u32 name_hash, | |
2184 | u16 *xe_index, | |
2185 | int *found) | |
2186 | { | |
2187 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
2188 | struct ocfs2_xattr_header *xh = | |
2189 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
2190 | size_t name_len = strlen(name); | |
2191 | struct ocfs2_xattr_entry *xe = NULL; | |
2192 | struct buffer_head *name_bh = NULL; | |
2193 | char *xe_name; | |
2194 | ||
2195 | /* | |
2196 | * We don't use binary search in the bucket because there | |
2197 | * may be multiple entries with the same name hash. | |
2198 | */ | |
2199 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2200 | xe = &xh->xh_entries[i]; | |
2201 | ||
2202 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2203 | continue; | |
2204 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2205 | break; | |
2206 | ||
2207 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2208 | if (!cmp) | |
2209 | cmp = name_len - xe->xe_name_len; | |
2210 | if (cmp) | |
2211 | continue; | |
2212 | ||
2213 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2214 | xh, | |
2215 | i, | |
2216 | &block_off, | |
2217 | &new_offset); | |
2218 | if (ret) { | |
2219 | mlog_errno(ret); | |
2220 | break; | |
2221 | } | |
2222 | ||
0fcaa56a JB |
2223 | ret = ocfs2_read_block(inode, header_bh->b_blocknr + block_off, |
2224 | &name_bh); | |
589dc260 TM |
2225 | if (ret) { |
2226 | mlog_errno(ret); | |
2227 | break; | |
2228 | } | |
2229 | xe_name = name_bh->b_data + new_offset; | |
2230 | ||
2231 | cmp = memcmp(name, xe_name, name_len); | |
2232 | brelse(name_bh); | |
2233 | name_bh = NULL; | |
2234 | ||
2235 | if (cmp == 0) { | |
2236 | *xe_index = i; | |
2237 | *found = 1; | |
2238 | ret = 0; | |
2239 | break; | |
2240 | } | |
2241 | } | |
2242 | ||
2243 | return ret; | |
2244 | } | |
2245 | ||
2246 | /* | |
2247 | * Find the specified xattr entry in a series of buckets. | |
2248 | * This series start from p_blkno and last for num_clusters. | |
2249 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2250 | * the num of the valid buckets. | |
2251 | * | |
2252 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2253 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2254 | */ | |
2255 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2256 | int name_index, | |
2257 | const char *name, | |
2258 | u32 name_hash, | |
2259 | u64 p_blkno, | |
2260 | u32 first_hash, | |
2261 | u32 num_clusters, | |
2262 | struct ocfs2_xattr_search *xs) | |
2263 | { | |
2264 | int ret, found = 0; | |
2265 | struct buffer_head *bh = NULL; | |
2266 | struct buffer_head *lower_bh = NULL; | |
2267 | struct ocfs2_xattr_header *xh = NULL; | |
2268 | struct ocfs2_xattr_entry *xe = NULL; | |
2269 | u16 index = 0; | |
2270 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2271 | int low_bucket = 0, bucket, high_bucket; | |
2272 | u32 last_hash; | |
2273 | u64 blkno; | |
2274 | ||
0fcaa56a | 2275 | ret = ocfs2_read_block(inode, p_blkno, &bh); |
589dc260 TM |
2276 | if (ret) { |
2277 | mlog_errno(ret); | |
2278 | goto out; | |
2279 | } | |
2280 | ||
2281 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
2282 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; | |
2283 | ||
2284 | while (low_bucket <= high_bucket) { | |
2285 | brelse(bh); | |
2286 | bh = NULL; | |
2287 | bucket = (low_bucket + high_bucket) / 2; | |
2288 | ||
2289 | blkno = p_blkno + bucket * blk_per_bucket; | |
2290 | ||
0fcaa56a | 2291 | ret = ocfs2_read_block(inode, blkno, &bh); |
589dc260 TM |
2292 | if (ret) { |
2293 | mlog_errno(ret); | |
2294 | goto out; | |
2295 | } | |
2296 | ||
2297 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
2298 | xe = &xh->xh_entries[0]; | |
2299 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
2300 | high_bucket = bucket - 1; | |
2301 | continue; | |
2302 | } | |
2303 | ||
2304 | /* | |
2305 | * Check whether the hash of the last entry in our | |
5a095611 TM |
2306 | * bucket is larger than the search one. for an empty |
2307 | * bucket, the last one is also the first one. | |
589dc260 | 2308 | */ |
5a095611 TM |
2309 | if (xh->xh_count) |
2310 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
2311 | ||
589dc260 TM |
2312 | last_hash = le32_to_cpu(xe->xe_name_hash); |
2313 | ||
2314 | /* record lower_bh which may be the insert place. */ | |
2315 | brelse(lower_bh); | |
2316 | lower_bh = bh; | |
2317 | bh = NULL; | |
2318 | ||
2319 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
2320 | low_bucket = bucket + 1; | |
2321 | continue; | |
2322 | } | |
2323 | ||
2324 | /* the searched xattr should reside in this bucket if exists. */ | |
2325 | ret = ocfs2_find_xe_in_bucket(inode, lower_bh, | |
2326 | name_index, name, name_hash, | |
2327 | &index, &found); | |
2328 | if (ret) { | |
2329 | mlog_errno(ret); | |
2330 | goto out; | |
2331 | } | |
2332 | break; | |
2333 | } | |
2334 | ||
2335 | /* | |
2336 | * Record the bucket we have found. | |
2337 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
2338 | * always set it to the previous bucket. | |
2339 | */ | |
2340 | if (!lower_bh) { | |
2341 | /* | |
2342 | * We can't find any bucket whose first name_hash is less | |
2343 | * than the find name_hash. | |
2344 | */ | |
2345 | BUG_ON(bh->b_blocknr != p_blkno); | |
2346 | lower_bh = bh; | |
2347 | bh = NULL; | |
2348 | } | |
2349 | xs->bucket.bhs[0] = lower_bh; | |
2350 | xs->bucket.xh = (struct ocfs2_xattr_header *) | |
2351 | xs->bucket.bhs[0]->b_data; | |
2352 | lower_bh = NULL; | |
2353 | ||
2354 | xs->header = xs->bucket.xh; | |
2355 | xs->base = xs->bucket.bhs[0]->b_data; | |
2356 | xs->end = xs->base + inode->i_sb->s_blocksize; | |
2357 | ||
2358 | if (found) { | |
2359 | /* | |
2360 | * If we have found the xattr enty, read all the blocks in | |
2361 | * this bucket. | |
2362 | */ | |
31d33073 | 2363 | ret = ocfs2_read_blocks(inode, xs->bucket.bhs[0]->b_blocknr + 1, |
589dc260 | 2364 | blk_per_bucket - 1, &xs->bucket.bhs[1], |
1efd47f8 | 2365 | 0); |
589dc260 TM |
2366 | if (ret) { |
2367 | mlog_errno(ret); | |
2368 | goto out; | |
2369 | } | |
2370 | ||
2371 | xs->here = &xs->header->xh_entries[index]; | |
2372 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
2373 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr, index); | |
2374 | } else | |
2375 | ret = -ENODATA; | |
2376 | ||
2377 | out: | |
2378 | brelse(bh); | |
2379 | brelse(lower_bh); | |
2380 | return ret; | |
2381 | } | |
2382 | ||
2383 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
2384 | struct buffer_head *root_bh, | |
2385 | int name_index, | |
2386 | const char *name, | |
2387 | struct ocfs2_xattr_search *xs) | |
2388 | { | |
2389 | int ret; | |
2390 | struct ocfs2_xattr_block *xb = | |
2391 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
2392 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
2393 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
2394 | u64 p_blkno = 0; | |
2395 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 2396 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
2397 | |
2398 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2399 | return -ENODATA; | |
2400 | ||
2401 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
2402 | name, name_hash, name_index); | |
2403 | ||
2404 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
2405 | &num_clusters, el); | |
2406 | if (ret) { | |
2407 | mlog_errno(ret); | |
2408 | goto out; | |
2409 | } | |
2410 | ||
2411 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
2412 | ||
2413 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
2414 | "in the rec is %u\n", num_clusters, p_blkno, first_hash); | |
2415 | ||
2416 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
2417 | p_blkno, first_hash, num_clusters, xs); | |
2418 | ||
2419 | out: | |
2420 | return ret; | |
2421 | } | |
2422 | ||
0c044f0b TM |
2423 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
2424 | u64 blkno, | |
2425 | u32 clusters, | |
2426 | xattr_bucket_func *func, | |
2427 | void *para) | |
2428 | { | |
2429 | int i, j, ret = 0; | |
2430 | int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2431 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); | |
2432 | u32 num_buckets = clusters * bpc; | |
2433 | struct ocfs2_xattr_bucket bucket; | |
2434 | ||
2435 | memset(&bucket, 0, sizeof(bucket)); | |
2436 | ||
2437 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
2438 | clusters, blkno); | |
2439 | ||
2440 | for (i = 0; i < num_buckets; i++, blkno += blk_per_bucket) { | |
31d33073 | 2441 | ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket, |
1efd47f8 | 2442 | bucket.bhs, 0); |
0c044f0b TM |
2443 | if (ret) { |
2444 | mlog_errno(ret); | |
2445 | goto out; | |
2446 | } | |
2447 | ||
2448 | bucket.xh = (struct ocfs2_xattr_header *)bucket.bhs[0]->b_data; | |
2449 | /* | |
2450 | * The real bucket num in this series of blocks is stored | |
2451 | * in the 1st bucket. | |
2452 | */ | |
2453 | if (i == 0) | |
2454 | num_buckets = le16_to_cpu(bucket.xh->xh_num_buckets); | |
2455 | ||
5a095611 TM |
2456 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", blkno, |
2457 | le32_to_cpu(bucket.xh->xh_entries[0].xe_name_hash)); | |
0c044f0b TM |
2458 | if (func) { |
2459 | ret = func(inode, &bucket, para); | |
2460 | if (ret) { | |
2461 | mlog_errno(ret); | |
2462 | break; | |
2463 | } | |
2464 | } | |
2465 | ||
2466 | for (j = 0; j < blk_per_bucket; j++) | |
2467 | brelse(bucket.bhs[j]); | |
2468 | memset(&bucket, 0, sizeof(bucket)); | |
2469 | } | |
2470 | ||
2471 | out: | |
2472 | for (j = 0; j < blk_per_bucket; j++) | |
2473 | brelse(bucket.bhs[j]); | |
2474 | ||
2475 | return ret; | |
2476 | } | |
2477 | ||
2478 | struct ocfs2_xattr_tree_list { | |
2479 | char *buffer; | |
2480 | size_t buffer_size; | |
936b8834 | 2481 | size_t result; |
0c044f0b TM |
2482 | }; |
2483 | ||
2484 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
2485 | struct ocfs2_xattr_header *xh, | |
2486 | int index, | |
2487 | int *block_off, | |
2488 | int *new_offset) | |
2489 | { | |
2490 | u16 name_offset; | |
2491 | ||
2492 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
2493 | return -EINVAL; | |
2494 | ||
2495 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
2496 | ||
2497 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
2498 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
2499 | ||
2500 | return 0; | |
2501 | } | |
2502 | ||
2503 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
2504 | struct ocfs2_xattr_bucket *bucket, | |
2505 | void *para) | |
2506 | { | |
936b8834 | 2507 | int ret = 0, type; |
0c044f0b | 2508 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 2509 | int i, block_off, new_offset; |
936b8834 | 2510 | const char *prefix, *name; |
0c044f0b TM |
2511 | |
2512 | for (i = 0 ; i < le16_to_cpu(bucket->xh->xh_count); i++) { | |
2513 | struct ocfs2_xattr_entry *entry = &bucket->xh->xh_entries[i]; | |
936b8834 TM |
2514 | type = ocfs2_xattr_get_type(entry); |
2515 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 2516 | |
936b8834 | 2517 | if (prefix) { |
0c044f0b TM |
2518 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
2519 | bucket->xh, | |
2520 | i, | |
2521 | &block_off, | |
2522 | &new_offset); | |
2523 | if (ret) | |
2524 | break; | |
936b8834 TM |
2525 | |
2526 | name = (const char *)bucket->bhs[block_off]->b_data + | |
2527 | new_offset; | |
2528 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
2529 | xl->buffer_size, | |
2530 | &xl->result, | |
2531 | prefix, name, | |
2532 | entry->xe_name_len); | |
2533 | if (ret) | |
2534 | break; | |
0c044f0b TM |
2535 | } |
2536 | } | |
2537 | ||
2538 | return ret; | |
2539 | } | |
2540 | ||
2541 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
2542 | struct ocfs2_xattr_tree_root *xt, | |
2543 | char *buffer, | |
2544 | size_t buffer_size) | |
2545 | { | |
2546 | struct ocfs2_extent_list *el = &xt->xt_list; | |
2547 | int ret = 0; | |
2548 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
2549 | u64 p_blkno = 0; | |
2550 | struct ocfs2_xattr_tree_list xl = { | |
2551 | .buffer = buffer, | |
2552 | .buffer_size = buffer_size, | |
936b8834 | 2553 | .result = 0, |
0c044f0b TM |
2554 | }; |
2555 | ||
2556 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
2557 | return 0; | |
2558 | ||
2559 | while (name_hash > 0) { | |
2560 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
2561 | &e_cpos, &num_clusters, el); | |
2562 | if (ret) { | |
2563 | mlog_errno(ret); | |
2564 | goto out; | |
2565 | } | |
2566 | ||
2567 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
2568 | ocfs2_list_xattr_bucket, | |
2569 | &xl); | |
2570 | if (ret) { | |
2571 | mlog_errno(ret); | |
2572 | goto out; | |
2573 | } | |
2574 | ||
2575 | if (e_cpos == 0) | |
2576 | break; | |
2577 | ||
2578 | name_hash = e_cpos - 1; | |
2579 | } | |
2580 | ||
936b8834 | 2581 | ret = xl.result; |
0c044f0b TM |
2582 | out: |
2583 | return ret; | |
2584 | } | |
01225596 TM |
2585 | |
2586 | static int cmp_xe(const void *a, const void *b) | |
2587 | { | |
2588 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2589 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
2590 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
2591 | ||
2592 | if (l_hash > r_hash) | |
2593 | return 1; | |
2594 | if (l_hash < r_hash) | |
2595 | return -1; | |
2596 | return 0; | |
2597 | } | |
2598 | ||
2599 | static void swap_xe(void *a, void *b, int size) | |
2600 | { | |
2601 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
2602 | ||
2603 | tmp = *l; | |
2604 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
2605 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
2606 | } | |
2607 | ||
2608 | /* | |
2609 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
2610 | * and all the xattr entries will be moved to the new bucket. | |
2611 | * Note: we need to sort the entries since they are not saved in order | |
2612 | * in the ocfs2_xattr_block. | |
2613 | */ | |
2614 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
2615 | struct buffer_head *xb_bh, | |
2616 | struct buffer_head *xh_bh, | |
2617 | struct buffer_head *data_bh) | |
2618 | { | |
2619 | int i, blocksize = inode->i_sb->s_blocksize; | |
2620 | u16 offset, size, off_change; | |
2621 | struct ocfs2_xattr_entry *xe; | |
2622 | struct ocfs2_xattr_block *xb = | |
2623 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2624 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
2625 | struct ocfs2_xattr_header *xh = | |
2626 | (struct ocfs2_xattr_header *)xh_bh->b_data; | |
2627 | u16 count = le16_to_cpu(xb_xh->xh_count); | |
2628 | char *target = xh_bh->b_data, *src = xb_bh->b_data; | |
2629 | ||
2630 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
2631 | (unsigned long long)xb_bh->b_blocknr, | |
2632 | (unsigned long long)xh_bh->b_blocknr); | |
2633 | ||
2634 | memset(xh_bh->b_data, 0, blocksize); | |
2635 | if (data_bh) | |
2636 | memset(data_bh->b_data, 0, blocksize); | |
2637 | /* | |
2638 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
2639 | * there is a offset change corresponding to the change of | |
2640 | * ocfs2_xattr_header's position. | |
2641 | */ | |
2642 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2643 | xe = &xb_xh->xh_entries[count - 1]; | |
2644 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
2645 | size = blocksize - offset; | |
2646 | ||
2647 | /* copy all the names and values. */ | |
2648 | if (data_bh) | |
2649 | target = data_bh->b_data; | |
2650 | memcpy(target + offset, src + offset, size); | |
2651 | ||
2652 | /* Init new header now. */ | |
2653 | xh->xh_count = xb_xh->xh_count; | |
2654 | xh->xh_num_buckets = cpu_to_le16(1); | |
2655 | xh->xh_name_value_len = cpu_to_le16(size); | |
2656 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
2657 | ||
2658 | /* copy all the entries. */ | |
2659 | target = xh_bh->b_data; | |
2660 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); | |
2661 | size = count * sizeof(struct ocfs2_xattr_entry); | |
2662 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
2663 | ||
2664 | /* Change the xe offset for all the xe because of the move. */ | |
2665 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
2666 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
2667 | for (i = 0; i < count; i++) | |
2668 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
2669 | ||
2670 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
2671 | offset, size, off_change); | |
2672 | ||
2673 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
2674 | cmp_xe, swap_xe); | |
2675 | } | |
2676 | ||
2677 | /* | |
2678 | * After we move xattr from block to index btree, we have to | |
2679 | * update ocfs2_xattr_search to the new xe and base. | |
2680 | * | |
2681 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
2682 | * While if the entry is in index b-tree, "bucket" indicates the | |
2683 | * real place of the xattr. | |
2684 | */ | |
2685 | static int ocfs2_xattr_update_xattr_search(struct inode *inode, | |
2686 | struct ocfs2_xattr_search *xs, | |
2687 | struct buffer_head *old_bh, | |
2688 | struct buffer_head *new_bh) | |
2689 | { | |
2690 | int ret = 0; | |
2691 | char *buf = old_bh->b_data; | |
2692 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
2693 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
2694 | int i, blocksize = inode->i_sb->s_blocksize; | |
2695 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2696 | ||
2697 | xs->bucket.bhs[0] = new_bh; | |
2698 | get_bh(new_bh); | |
2699 | xs->bucket.xh = (struct ocfs2_xattr_header *)xs->bucket.bhs[0]->b_data; | |
2700 | xs->header = xs->bucket.xh; | |
2701 | ||
2702 | xs->base = new_bh->b_data; | |
2703 | xs->end = xs->base + inode->i_sb->s_blocksize; | |
2704 | ||
2705 | if (!xs->not_found) { | |
2706 | if (OCFS2_XATTR_BUCKET_SIZE != blocksize) { | |
31d33073 | 2707 | ret = ocfs2_read_blocks(inode, |
01225596 TM |
2708 | xs->bucket.bhs[0]->b_blocknr + 1, |
2709 | blk_per_bucket - 1, &xs->bucket.bhs[1], | |
1efd47f8 | 2710 | 0); |
01225596 TM |
2711 | if (ret) { |
2712 | mlog_errno(ret); | |
2713 | return ret; | |
2714 | } | |
2715 | ||
2716 | i = xs->here - old_xh->xh_entries; | |
2717 | xs->here = &xs->header->xh_entries[i]; | |
2718 | } | |
2719 | } | |
2720 | ||
2721 | return ret; | |
2722 | } | |
2723 | ||
2724 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
2725 | struct ocfs2_xattr_search *xs) | |
2726 | { | |
2727 | int ret, credits = OCFS2_SUBALLOC_ALLOC; | |
2728 | u32 bit_off, len; | |
2729 | u64 blkno; | |
2730 | handle_t *handle; | |
2731 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2732 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2733 | struct ocfs2_alloc_context *data_ac; | |
2734 | struct buffer_head *xh_bh = NULL, *data_bh = NULL; | |
2735 | struct buffer_head *xb_bh = xs->xattr_bh; | |
2736 | struct ocfs2_xattr_block *xb = | |
2737 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
2738 | struct ocfs2_xattr_tree_root *xr; | |
2739 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
2740 | u16 bpb = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2741 | ||
2742 | mlog(0, "create xattr index block for %llu\n", | |
2743 | (unsigned long long)xb_bh->b_blocknr); | |
2744 | ||
2745 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
2746 | ||
2747 | ret = ocfs2_reserve_clusters(osb, 1, &data_ac); | |
2748 | if (ret) { | |
2749 | mlog_errno(ret); | |
2750 | goto out; | |
2751 | } | |
2752 | ||
2753 | /* | |
2754 | * XXX: | |
2755 | * We can use this lock for now, and maybe move to a dedicated mutex | |
2756 | * if performance becomes a problem later. | |
2757 | */ | |
2758 | down_write(&oi->ip_alloc_sem); | |
2759 | ||
2760 | /* | |
2761 | * 3 more credits, one for xattr block update, one for the 1st block | |
2762 | * of the new xattr bucket and one for the value/data. | |
2763 | */ | |
2764 | credits += 3; | |
2765 | handle = ocfs2_start_trans(osb, credits); | |
2766 | if (IS_ERR(handle)) { | |
2767 | ret = PTR_ERR(handle); | |
2768 | mlog_errno(ret); | |
2769 | goto out_sem; | |
2770 | } | |
2771 | ||
2772 | ret = ocfs2_journal_access(handle, inode, xb_bh, | |
2773 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2774 | if (ret) { | |
2775 | mlog_errno(ret); | |
2776 | goto out_commit; | |
2777 | } | |
2778 | ||
2779 | ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len); | |
2780 | if (ret) { | |
2781 | mlog_errno(ret); | |
2782 | goto out_commit; | |
2783 | } | |
2784 | ||
2785 | /* | |
2786 | * The bucket may spread in many blocks, and | |
2787 | * we will only touch the 1st block and the last block | |
2788 | * in the whole bucket(one for entry and one for data). | |
2789 | */ | |
2790 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
2791 | ||
2792 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", blkno); | |
2793 | ||
2794 | xh_bh = sb_getblk(inode->i_sb, blkno); | |
2795 | if (!xh_bh) { | |
2796 | ret = -EIO; | |
2797 | mlog_errno(ret); | |
2798 | goto out_commit; | |
2799 | } | |
2800 | ||
2801 | ocfs2_set_new_buffer_uptodate(inode, xh_bh); | |
2802 | ||
2803 | ret = ocfs2_journal_access(handle, inode, xh_bh, | |
2804 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2805 | if (ret) { | |
2806 | mlog_errno(ret); | |
2807 | goto out_commit; | |
2808 | } | |
2809 | ||
2810 | if (bpb > 1) { | |
2811 | data_bh = sb_getblk(inode->i_sb, blkno + bpb - 1); | |
2812 | if (!data_bh) { | |
2813 | ret = -EIO; | |
2814 | mlog_errno(ret); | |
2815 | goto out_commit; | |
2816 | } | |
2817 | ||
2818 | ocfs2_set_new_buffer_uptodate(inode, data_bh); | |
2819 | ||
2820 | ret = ocfs2_journal_access(handle, inode, data_bh, | |
2821 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2822 | if (ret) { | |
2823 | mlog_errno(ret); | |
2824 | goto out_commit; | |
2825 | } | |
2826 | } | |
2827 | ||
2828 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xh_bh, data_bh); | |
2829 | ||
2830 | ocfs2_journal_dirty(handle, xh_bh); | |
2831 | if (data_bh) | |
2832 | ocfs2_journal_dirty(handle, data_bh); | |
2833 | ||
2834 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh, xh_bh); | |
2835 | ||
2836 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
2837 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
2838 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
2839 | ||
2840 | xr = &xb->xb_attrs.xb_root; | |
2841 | xr->xt_clusters = cpu_to_le32(1); | |
2842 | xr->xt_last_eb_blk = 0; | |
2843 | xr->xt_list.l_tree_depth = 0; | |
2844 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2845 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2846 | ||
2847 | xr->xt_list.l_recs[0].e_cpos = 0; | |
2848 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
2849 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
2850 | ||
2851 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
2852 | ||
2853 | ret = ocfs2_journal_dirty(handle, xb_bh); | |
2854 | if (ret) { | |
2855 | mlog_errno(ret); | |
2856 | goto out_commit; | |
2857 | } | |
2858 | ||
2859 | out_commit: | |
2860 | ocfs2_commit_trans(osb, handle); | |
2861 | ||
2862 | out_sem: | |
2863 | up_write(&oi->ip_alloc_sem); | |
2864 | ||
2865 | out: | |
2866 | if (data_ac) | |
2867 | ocfs2_free_alloc_context(data_ac); | |
2868 | ||
2869 | brelse(xh_bh); | |
2870 | brelse(data_bh); | |
2871 | ||
2872 | return ret; | |
2873 | } | |
2874 | ||
2875 | static int cmp_xe_offset(const void *a, const void *b) | |
2876 | { | |
2877 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
2878 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
2879 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
2880 | ||
2881 | if (l_name_offset < r_name_offset) | |
2882 | return 1; | |
2883 | if (l_name_offset > r_name_offset) | |
2884 | return -1; | |
2885 | return 0; | |
2886 | } | |
2887 | ||
2888 | /* | |
2889 | * defrag a xattr bucket if we find that the bucket has some | |
2890 | * holes beteen name/value pairs. | |
2891 | * We will move all the name/value pairs to the end of the bucket | |
2892 | * so that we can spare some space for insertion. | |
2893 | */ | |
2894 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
2895 | struct ocfs2_xattr_bucket *bucket) | |
2896 | { | |
2897 | int ret, i; | |
2898 | size_t end, offset, len, value_len; | |
2899 | struct ocfs2_xattr_header *xh; | |
2900 | char *entries, *buf, *bucket_buf = NULL; | |
2901 | u64 blkno = bucket->bhs[0]->b_blocknr; | |
2902 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2903 | u16 xh_free_start; | |
01225596 TM |
2904 | size_t blocksize = inode->i_sb->s_blocksize; |
2905 | handle_t *handle; | |
2906 | struct buffer_head **bhs; | |
2907 | struct ocfs2_xattr_entry *xe; | |
2908 | ||
2909 | bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
2910 | GFP_NOFS); | |
2911 | if (!bhs) | |
2912 | return -ENOMEM; | |
2913 | ||
1efd47f8 | 2914 | ret = ocfs2_read_blocks(inode, blkno, blk_per_bucket, bhs, 0); |
01225596 TM |
2915 | if (ret) |
2916 | goto out; | |
2917 | ||
2918 | /* | |
2919 | * In order to make the operation more efficient and generic, | |
2920 | * we copy all the blocks into a contiguous memory and do the | |
2921 | * defragment there, so if anything is error, we will not touch | |
2922 | * the real block. | |
2923 | */ | |
2924 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
2925 | if (!bucket_buf) { | |
2926 | ret = -EIO; | |
2927 | goto out; | |
2928 | } | |
2929 | ||
2930 | buf = bucket_buf; | |
2931 | for (i = 0; i < blk_per_bucket; i++, buf += blocksize) | |
2932 | memcpy(buf, bhs[i]->b_data, blocksize); | |
2933 | ||
2934 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), blk_per_bucket); | |
2935 | if (IS_ERR(handle)) { | |
2936 | ret = PTR_ERR(handle); | |
2937 | handle = NULL; | |
2938 | mlog_errno(ret); | |
2939 | goto out; | |
2940 | } | |
2941 | ||
2942 | for (i = 0; i < blk_per_bucket; i++) { | |
2943 | ret = ocfs2_journal_access(handle, inode, bhs[i], | |
2944 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2945 | if (ret < 0) { | |
2946 | mlog_errno(ret); | |
2947 | goto commit; | |
2948 | } | |
2949 | } | |
2950 | ||
2951 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
2952 | entries = (char *)xh->xh_entries; | |
2953 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
2954 | ||
2955 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
2956 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
2957 | blkno, le16_to_cpu(xh->xh_count), xh_free_start, | |
2958 | le16_to_cpu(xh->xh_name_value_len)); | |
2959 | ||
2960 | /* | |
2961 | * sort all the entries by their offset. | |
2962 | * the largest will be the first, so that we can | |
2963 | * move them to the end one by one. | |
2964 | */ | |
2965 | sort(entries, le16_to_cpu(xh->xh_count), | |
2966 | sizeof(struct ocfs2_xattr_entry), | |
2967 | cmp_xe_offset, swap_xe); | |
2968 | ||
2969 | /* Move all name/values to the end of the bucket. */ | |
2970 | xe = xh->xh_entries; | |
2971 | end = OCFS2_XATTR_BUCKET_SIZE; | |
2972 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
2973 | offset = le16_to_cpu(xe->xe_name_offset); | |
2974 | if (ocfs2_xattr_is_local(xe)) | |
2975 | value_len = OCFS2_XATTR_SIZE( | |
2976 | le64_to_cpu(xe->xe_value_size)); | |
2977 | else | |
2978 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
2979 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
2980 | ||
2981 | /* | |
2982 | * We must make sure that the name/value pair | |
2983 | * exist in the same block. So adjust end to | |
2984 | * the previous block end if needed. | |
2985 | */ | |
2986 | if (((end - len) / blocksize != | |
2987 | (end - 1) / blocksize)) | |
2988 | end = end - end % blocksize; | |
2989 | ||
2990 | if (end > offset + len) { | |
2991 | memmove(bucket_buf + end - len, | |
2992 | bucket_buf + offset, len); | |
2993 | xe->xe_name_offset = cpu_to_le16(end - len); | |
2994 | } | |
2995 | ||
2996 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
2997 | "bucket %llu\n", (unsigned long long)blkno); | |
2998 | ||
2999 | end -= len; | |
3000 | } | |
3001 | ||
3002 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3003 | "bucket %llu\n", (unsigned long long)blkno); | |
3004 | ||
3005 | if (xh_free_start == end) | |
3006 | goto commit; | |
3007 | ||
3008 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3009 | xh->xh_free_start = cpu_to_le16(end); | |
3010 | ||
3011 | /* sort the entries by their name_hash. */ | |
3012 | sort(entries, le16_to_cpu(xh->xh_count), | |
3013 | sizeof(struct ocfs2_xattr_entry), | |
3014 | cmp_xe, swap_xe); | |
3015 | ||
3016 | buf = bucket_buf; | |
3017 | for (i = 0; i < blk_per_bucket; i++, buf += blocksize) { | |
3018 | memcpy(bhs[i]->b_data, buf, blocksize); | |
3019 | ocfs2_journal_dirty(handle, bhs[i]); | |
3020 | } | |
3021 | ||
3022 | commit: | |
3023 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
3024 | out: | |
3025 | ||
3026 | if (bhs) { | |
3027 | for (i = 0; i < blk_per_bucket; i++) | |
3028 | brelse(bhs[i]); | |
3029 | } | |
3030 | kfree(bhs); | |
3031 | ||
3032 | kfree(bucket_buf); | |
3033 | return ret; | |
3034 | } | |
3035 | ||
3036 | /* | |
3037 | * Move half nums of the xattr bucket in the previous cluster to this new | |
3038 | * cluster. We only touch the last cluster of the previous extend record. | |
3039 | * | |
3040 | * first_bh is the first buffer_head of a series of bucket in the same | |
3041 | * extent rec and header_bh is the header of one bucket in this cluster. | |
3042 | * They will be updated if we move the data header_bh contains to the new | |
3043 | * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. | |
3044 | */ | |
3045 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3046 | handle_t *handle, | |
3047 | struct buffer_head **first_bh, | |
3048 | struct buffer_head **header_bh, | |
3049 | u64 new_blkno, | |
3050 | u64 prev_blkno, | |
3051 | u32 num_clusters, | |
3052 | u32 *first_hash) | |
3053 | { | |
3054 | int i, ret, credits; | |
3055 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3056 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3057 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3058 | int blocksize = inode->i_sb->s_blocksize; | |
3059 | struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; | |
3060 | struct ocfs2_xattr_header *new_xh; | |
3061 | struct ocfs2_xattr_header *xh = | |
3062 | (struct ocfs2_xattr_header *)((*first_bh)->b_data); | |
3063 | ||
3064 | BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); | |
3065 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); | |
3066 | ||
3067 | prev_bh = *first_bh; | |
3068 | get_bh(prev_bh); | |
3069 | xh = (struct ocfs2_xattr_header *)prev_bh->b_data; | |
3070 | ||
3071 | prev_blkno += (num_clusters - 1) * bpc + bpc / 2; | |
3072 | ||
3073 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", | |
3074 | prev_blkno, new_blkno); | |
3075 | ||
3076 | /* | |
3077 | * We need to update the 1st half of the new cluster and | |
3078 | * 1 more for the update of the 1st bucket of the previous | |
3079 | * extent record. | |
3080 | */ | |
3081 | credits = bpc / 2 + 1; | |
3082 | ret = ocfs2_extend_trans(handle, credits); | |
3083 | if (ret) { | |
3084 | mlog_errno(ret); | |
3085 | goto out; | |
3086 | } | |
3087 | ||
3088 | ret = ocfs2_journal_access(handle, inode, prev_bh, | |
3089 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3090 | if (ret) { | |
3091 | mlog_errno(ret); | |
3092 | goto out; | |
3093 | } | |
3094 | ||
3095 | for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { | |
3096 | old_bh = new_bh = NULL; | |
3097 | new_bh = sb_getblk(inode->i_sb, new_blkno); | |
3098 | if (!new_bh) { | |
3099 | ret = -EIO; | |
3100 | mlog_errno(ret); | |
3101 | goto out; | |
3102 | } | |
3103 | ||
3104 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
3105 | ||
3106 | ret = ocfs2_journal_access(handle, inode, new_bh, | |
3107 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3108 | if (ret < 0) { | |
3109 | mlog_errno(ret); | |
3110 | brelse(new_bh); | |
3111 | goto out; | |
3112 | } | |
3113 | ||
0fcaa56a | 3114 | ret = ocfs2_read_block(inode, prev_blkno, &old_bh); |
01225596 TM |
3115 | if (ret < 0) { |
3116 | mlog_errno(ret); | |
3117 | brelse(new_bh); | |
3118 | goto out; | |
3119 | } | |
3120 | ||
3121 | memcpy(new_bh->b_data, old_bh->b_data, blocksize); | |
3122 | ||
3123 | if (i == 0) { | |
3124 | new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; | |
3125 | new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); | |
3126 | ||
3127 | if (first_hash) | |
3128 | *first_hash = le32_to_cpu( | |
3129 | new_xh->xh_entries[0].xe_name_hash); | |
3130 | new_first_bh = new_bh; | |
3131 | get_bh(new_first_bh); | |
3132 | } | |
3133 | ||
3134 | ocfs2_journal_dirty(handle, new_bh); | |
3135 | ||
3136 | if (*header_bh == old_bh) { | |
3137 | brelse(*header_bh); | |
3138 | *header_bh = new_bh; | |
3139 | get_bh(*header_bh); | |
3140 | ||
3141 | brelse(*first_bh); | |
3142 | *first_bh = new_first_bh; | |
3143 | get_bh(*first_bh); | |
3144 | } | |
3145 | brelse(new_bh); | |
3146 | brelse(old_bh); | |
3147 | } | |
3148 | ||
3149 | le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); | |
3150 | ||
3151 | ocfs2_journal_dirty(handle, prev_bh); | |
3152 | out: | |
3153 | brelse(prev_bh); | |
3154 | brelse(new_first_bh); | |
3155 | return ret; | |
3156 | } | |
3157 | ||
3158 | static int ocfs2_read_xattr_bucket(struct inode *inode, | |
3159 | u64 blkno, | |
3160 | struct buffer_head **bhs, | |
3161 | int new) | |
3162 | { | |
3163 | int ret = 0; | |
3164 | u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3165 | ||
3166 | if (!new) | |
31d33073 | 3167 | return ocfs2_read_blocks(inode, blkno, |
1efd47f8 | 3168 | blk_per_bucket, bhs, 0); |
01225596 TM |
3169 | |
3170 | for (i = 0; i < blk_per_bucket; i++) { | |
3171 | bhs[i] = sb_getblk(inode->i_sb, blkno + i); | |
3172 | if (bhs[i] == NULL) { | |
3173 | ret = -EIO; | |
3174 | mlog_errno(ret); | |
3175 | break; | |
3176 | } | |
3177 | ocfs2_set_new_buffer_uptodate(inode, bhs[i]); | |
3178 | } | |
3179 | ||
3180 | return ret; | |
3181 | } | |
3182 | ||
3183 | /* | |
3184 | * Move half num of the xattrs in old bucket(blk) to new bucket(new_blk). | |
3185 | * first_hash will record the 1st hash of the new bucket. | |
3186 | */ | |
3187 | static int ocfs2_half_xattr_bucket(struct inode *inode, | |
3188 | handle_t *handle, | |
3189 | u64 blk, | |
3190 | u64 new_blk, | |
3191 | u32 *first_hash, | |
3192 | int new_bucket_head) | |
3193 | { | |
3194 | int ret, i; | |
3195 | u16 count, start, len, name_value_len, xe_len, name_offset; | |
3196 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3197 | struct buffer_head **s_bhs, **t_bhs = NULL; | |
3198 | struct ocfs2_xattr_header *xh; | |
3199 | struct ocfs2_xattr_entry *xe; | |
3200 | int blocksize = inode->i_sb->s_blocksize; | |
3201 | ||
3202 | mlog(0, "move half of xattrs from bucket %llu to %llu\n", | |
3203 | blk, new_blk); | |
3204 | ||
3205 | s_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); | |
3206 | if (!s_bhs) | |
3207 | return -ENOMEM; | |
3208 | ||
3209 | ret = ocfs2_read_xattr_bucket(inode, blk, s_bhs, 0); | |
3210 | if (ret) { | |
3211 | mlog_errno(ret); | |
3212 | goto out; | |
3213 | } | |
3214 | ||
3215 | ret = ocfs2_journal_access(handle, inode, s_bhs[0], | |
3216 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3217 | if (ret) { | |
3218 | mlog_errno(ret); | |
3219 | goto out; | |
3220 | } | |
3221 | ||
3222 | t_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); | |
3223 | if (!t_bhs) { | |
3224 | ret = -ENOMEM; | |
3225 | goto out; | |
3226 | } | |
3227 | ||
3228 | ret = ocfs2_read_xattr_bucket(inode, new_blk, t_bhs, new_bucket_head); | |
3229 | if (ret) { | |
3230 | mlog_errno(ret); | |
3231 | goto out; | |
3232 | } | |
3233 | ||
3234 | for (i = 0; i < blk_per_bucket; i++) { | |
3235 | ret = ocfs2_journal_access(handle, inode, t_bhs[i], | |
3236 | OCFS2_JOURNAL_ACCESS_CREATE); | |
3237 | if (ret) { | |
3238 | mlog_errno(ret); | |
3239 | goto out; | |
3240 | } | |
3241 | } | |
3242 | ||
3243 | /* copy the whole bucket to the new first. */ | |
3244 | for (i = 0; i < blk_per_bucket; i++) | |
3245 | memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); | |
3246 | ||
3247 | /* update the new bucket. */ | |
3248 | xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data; | |
3249 | count = le16_to_cpu(xh->xh_count); | |
3250 | start = count / 2; | |
3251 | ||
3252 | /* | |
3253 | * Calculate the total name/value len and xh_free_start for | |
3254 | * the old bucket first. | |
3255 | */ | |
3256 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3257 | name_value_len = 0; | |
3258 | for (i = 0; i < start; i++) { | |
3259 | xe = &xh->xh_entries[i]; | |
3260 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3261 | if (ocfs2_xattr_is_local(xe)) | |
3262 | xe_len += | |
3263 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3264 | else | |
3265 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3266 | name_value_len += xe_len; | |
3267 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3268 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3269 | } | |
3270 | ||
3271 | /* | |
3272 | * Now begin the modification to the new bucket. | |
3273 | * | |
3274 | * In the new bucket, We just move the xattr entry to the beginning | |
3275 | * and don't touch the name/value. So there will be some holes in the | |
3276 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3277 | * called. | |
3278 | */ | |
3279 | xe = &xh->xh_entries[start]; | |
3280 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3281 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3282 | (int)((char *)xe - (char *)xh), |
3283 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3284 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3285 | xe = &xh->xh_entries[count - start]; | |
3286 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3287 | memset((char *)xe, 0, len); | |
3288 | ||
3289 | le16_add_cpu(&xh->xh_count, -start); | |
3290 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3291 | ||
3292 | /* Calculate xh_free_start for the new bucket. */ | |
3293 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3294 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3295 | xe = &xh->xh_entries[i]; | |
3296 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3297 | if (ocfs2_xattr_is_local(xe)) | |
3298 | xe_len += | |
3299 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3300 | else | |
3301 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3302 | if (le16_to_cpu(xe->xe_name_offset) < | |
3303 | le16_to_cpu(xh->xh_free_start)) | |
3304 | xh->xh_free_start = xe->xe_name_offset; | |
3305 | } | |
3306 | ||
3307 | /* set xh->xh_num_buckets for the new xh. */ | |
3308 | if (new_bucket_head) | |
3309 | xh->xh_num_buckets = cpu_to_le16(1); | |
3310 | else | |
3311 | xh->xh_num_buckets = 0; | |
3312 | ||
3313 | for (i = 0; i < blk_per_bucket; i++) { | |
3314 | ocfs2_journal_dirty(handle, t_bhs[i]); | |
3315 | if (ret) | |
3316 | mlog_errno(ret); | |
3317 | } | |
3318 | ||
3319 | /* store the first_hash of the new bucket. */ | |
3320 | if (first_hash) | |
3321 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3322 | ||
3323 | /* | |
3324 | * Now only update the 1st block of the old bucket. | |
3325 | * Please note that the entry has been sorted already above. | |
3326 | */ | |
3327 | xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data; | |
3328 | memset(&xh->xh_entries[start], 0, | |
3329 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3330 | xh->xh_count = cpu_to_le16(start); | |
3331 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3332 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3333 | ||
3334 | ocfs2_journal_dirty(handle, s_bhs[0]); | |
3335 | if (ret) | |
3336 | mlog_errno(ret); | |
3337 | ||
3338 | out: | |
3339 | if (s_bhs) { | |
3340 | for (i = 0; i < blk_per_bucket; i++) | |
3341 | brelse(s_bhs[i]); | |
3342 | } | |
3343 | kfree(s_bhs); | |
3344 | ||
3345 | if (t_bhs) { | |
3346 | for (i = 0; i < blk_per_bucket; i++) | |
3347 | brelse(t_bhs[i]); | |
3348 | } | |
3349 | kfree(t_bhs); | |
3350 | ||
3351 | return ret; | |
3352 | } | |
3353 | ||
3354 | /* | |
3355 | * Copy xattr from one bucket to another bucket. | |
3356 | * | |
3357 | * The caller must make sure that the journal transaction | |
3358 | * has enough space for journaling. | |
3359 | */ | |
3360 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3361 | handle_t *handle, | |
3362 | u64 s_blkno, | |
3363 | u64 t_blkno, | |
3364 | int t_is_new) | |
3365 | { | |
3366 | int ret, i; | |
3367 | int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3368 | int blocksize = inode->i_sb->s_blocksize; | |
3369 | struct buffer_head **s_bhs, **t_bhs = NULL; | |
3370 | ||
3371 | BUG_ON(s_blkno == t_blkno); | |
3372 | ||
3373 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
3374 | s_blkno, t_blkno, t_is_new); | |
3375 | ||
3376 | s_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
3377 | GFP_NOFS); | |
3378 | if (!s_bhs) | |
3379 | return -ENOMEM; | |
3380 | ||
3381 | ret = ocfs2_read_xattr_bucket(inode, s_blkno, s_bhs, 0); | |
3382 | if (ret) | |
3383 | goto out; | |
3384 | ||
3385 | t_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, | |
3386 | GFP_NOFS); | |
3387 | if (!t_bhs) { | |
3388 | ret = -ENOMEM; | |
3389 | goto out; | |
3390 | } | |
3391 | ||
3392 | ret = ocfs2_read_xattr_bucket(inode, t_blkno, t_bhs, t_is_new); | |
3393 | if (ret) | |
3394 | goto out; | |
3395 | ||
3396 | for (i = 0; i < blk_per_bucket; i++) { | |
3397 | ret = ocfs2_journal_access(handle, inode, t_bhs[i], | |
3398 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3399 | if (ret) | |
3400 | goto out; | |
3401 | } | |
3402 | ||
3403 | for (i = 0; i < blk_per_bucket; i++) { | |
3404 | memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); | |
3405 | ocfs2_journal_dirty(handle, t_bhs[i]); | |
3406 | } | |
3407 | ||
3408 | out: | |
3409 | if (s_bhs) { | |
3410 | for (i = 0; i < blk_per_bucket; i++) | |
3411 | brelse(s_bhs[i]); | |
3412 | } | |
3413 | kfree(s_bhs); | |
3414 | ||
3415 | if (t_bhs) { | |
3416 | for (i = 0; i < blk_per_bucket; i++) | |
3417 | brelse(t_bhs[i]); | |
3418 | } | |
3419 | kfree(t_bhs); | |
3420 | ||
3421 | return ret; | |
3422 | } | |
3423 | ||
3424 | /* | |
3425 | * Copy one xattr cluster from src_blk to to_blk. | |
3426 | * The to_blk will become the first bucket header of the cluster, so its | |
3427 | * xh_num_buckets will be initialized as the bucket num in the cluster. | |
3428 | */ | |
3429 | static int ocfs2_cp_xattr_cluster(struct inode *inode, | |
3430 | handle_t *handle, | |
3431 | struct buffer_head *first_bh, | |
3432 | u64 src_blk, | |
3433 | u64 to_blk, | |
3434 | u32 *first_hash) | |
3435 | { | |
3436 | int i, ret, credits; | |
3437 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3438 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3439 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); | |
3440 | struct buffer_head *bh = NULL; | |
3441 | struct ocfs2_xattr_header *xh; | |
3442 | u64 to_blk_start = to_blk; | |
3443 | ||
3444 | mlog(0, "cp xattrs from cluster %llu to %llu\n", src_blk, to_blk); | |
3445 | ||
3446 | /* | |
3447 | * We need to update the new cluster and 1 more for the update of | |
3448 | * the 1st bucket of the previous extent rec. | |
3449 | */ | |
3450 | credits = bpc + 1; | |
3451 | ret = ocfs2_extend_trans(handle, credits); | |
3452 | if (ret) { | |
3453 | mlog_errno(ret); | |
3454 | goto out; | |
3455 | } | |
3456 | ||
3457 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3458 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3459 | if (ret) { | |
3460 | mlog_errno(ret); | |
3461 | goto out; | |
3462 | } | |
3463 | ||
3464 | for (i = 0; i < num_buckets; i++) { | |
3465 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
3466 | src_blk, to_blk, 1); | |
3467 | if (ret) { | |
3468 | mlog_errno(ret); | |
3469 | goto out; | |
3470 | } | |
3471 | ||
3472 | src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3473 | to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3474 | } | |
3475 | ||
3476 | /* update the old bucket header. */ | |
3477 | xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3478 | le16_add_cpu(&xh->xh_num_buckets, -num_buckets); | |
3479 | ||
3480 | ocfs2_journal_dirty(handle, first_bh); | |
3481 | ||
3482 | /* update the new bucket header. */ | |
0fcaa56a | 3483 | ret = ocfs2_read_block(inode, to_blk_start, &bh); |
01225596 TM |
3484 | if (ret < 0) { |
3485 | mlog_errno(ret); | |
3486 | goto out; | |
3487 | } | |
3488 | ||
3489 | ret = ocfs2_journal_access(handle, inode, bh, | |
3490 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3491 | if (ret) { | |
3492 | mlog_errno(ret); | |
3493 | goto out; | |
3494 | } | |
3495 | ||
3496 | xh = (struct ocfs2_xattr_header *)bh->b_data; | |
3497 | xh->xh_num_buckets = cpu_to_le16(num_buckets); | |
3498 | ||
3499 | ocfs2_journal_dirty(handle, bh); | |
3500 | ||
3501 | if (first_hash) | |
3502 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3503 | out: | |
3504 | brelse(bh); | |
3505 | return ret; | |
3506 | } | |
3507 | ||
3508 | /* | |
3509 | * Move half of the xattrs in this cluster to the new cluster. | |
3510 | * This function should only be called when bucket size == cluster size. | |
3511 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
3512 | */ | |
3513 | static int ocfs2_half_xattr_cluster(struct inode *inode, | |
3514 | handle_t *handle, | |
3515 | u64 prev_blk, | |
3516 | u64 new_blk, | |
3517 | u32 *first_hash) | |
3518 | { | |
3519 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3520 | int ret, credits = 2 * blk_per_bucket; | |
3521 | ||
3522 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
3523 | ||
3524 | ret = ocfs2_extend_trans(handle, credits); | |
3525 | if (ret) { | |
3526 | mlog_errno(ret); | |
3527 | return ret; | |
3528 | } | |
3529 | ||
3530 | /* Move half of the xattr in start_blk to the next bucket. */ | |
3531 | return ocfs2_half_xattr_bucket(inode, handle, prev_blk, | |
3532 | new_blk, first_hash, 1); | |
3533 | } | |
3534 | ||
3535 | /* | |
3536 | * Move some xattrs from the old cluster to the new one since they are not | |
3537 | * contiguous in ocfs2 xattr tree. | |
3538 | * | |
3539 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
3540 | * prev_blk to it. v_start will be set as the first name hash value in this | |
3541 | * new cluster so that it can be used as e_cpos during tree insertion and | |
3542 | * don't collide with our original b-tree operations. first_bh and header_bh | |
3543 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
3544 | * to extend the insert bucket. | |
3545 | * | |
3546 | * The problem is how much xattr should we move to the new one and when should | |
3547 | * we update first_bh and header_bh? | |
3548 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
3549 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
3550 | * update the first_bh and header_bh if the insert bucket has been moved | |
3551 | * to the new cluster. | |
3552 | * 2. If cluster_size == bucket_size: | |
3553 | * a) If the previous extent rec has more than one cluster and the insert | |
3554 | * place isn't in the last cluster, copy the entire last cluster to the | |
3555 | * new one. This time, we don't need to upate the first_bh and header_bh | |
3556 | * since they will not be moved into the new cluster. | |
3557 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
3558 | * the new one. And we set the extend flag to zero if the insert place is | |
3559 | * moved into the new allocated cluster since no extend is needed. | |
3560 | */ | |
3561 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
3562 | handle_t *handle, | |
3563 | struct buffer_head **first_bh, | |
3564 | struct buffer_head **header_bh, | |
3565 | u64 new_blk, | |
3566 | u64 prev_blk, | |
3567 | u32 prev_clusters, | |
3568 | u32 *v_start, | |
3569 | int *extend) | |
3570 | { | |
3571 | int ret = 0; | |
3572 | int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3573 | ||
3574 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
3575 | prev_blk, prev_clusters, new_blk); | |
3576 | ||
3577 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) | |
3578 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, | |
3579 | handle, | |
3580 | first_bh, | |
3581 | header_bh, | |
3582 | new_blk, | |
3583 | prev_blk, | |
3584 | prev_clusters, | |
3585 | v_start); | |
3586 | else { | |
3587 | u64 last_blk = prev_blk + bpc * (prev_clusters - 1); | |
3588 | ||
3589 | if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) | |
3590 | ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, | |
3591 | last_blk, new_blk, | |
3592 | v_start); | |
3593 | else { | |
3594 | ret = ocfs2_half_xattr_cluster(inode, handle, | |
3595 | last_blk, new_blk, | |
3596 | v_start); | |
3597 | ||
3598 | if ((*header_bh)->b_blocknr == last_blk && extend) | |
3599 | *extend = 0; | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | return ret; | |
3604 | } | |
3605 | ||
3606 | /* | |
3607 | * Add a new cluster for xattr storage. | |
3608 | * | |
3609 | * If the new cluster is contiguous with the previous one, it will be | |
3610 | * appended to the same extent record, and num_clusters will be updated. | |
3611 | * If not, we will insert a new extent for it and move some xattrs in | |
3612 | * the last cluster into the new allocated one. | |
3613 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
3614 | * lose the benefits of hashing because we'll have to search large leaves. | |
3615 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
3616 | * if it's bigger). | |
3617 | * | |
3618 | * first_bh is the first block of the previous extent rec and header_bh | |
3619 | * indicates the bucket we will insert the new xattrs. They will be updated | |
3620 | * when the header_bh is moved into the new cluster. | |
3621 | */ | |
3622 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
3623 | struct buffer_head *root_bh, | |
3624 | struct buffer_head **first_bh, | |
3625 | struct buffer_head **header_bh, | |
3626 | u32 *num_clusters, | |
3627 | u32 prev_cpos, | |
3628 | u64 prev_blkno, | |
3629 | int *extend) | |
3630 | { | |
3631 | int ret, credits; | |
3632 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3633 | u32 prev_clusters = *num_clusters; | |
3634 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
3635 | u64 block; | |
3636 | handle_t *handle = NULL; | |
3637 | struct ocfs2_alloc_context *data_ac = NULL; | |
3638 | struct ocfs2_alloc_context *meta_ac = NULL; | |
3639 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
f99b9b7c | 3640 | struct ocfs2_extent_tree et; |
01225596 TM |
3641 | |
3642 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
3643 | "previous xattr blkno = %llu\n", | |
3644 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
3645 | prev_cpos, prev_blkno); | |
3646 | ||
8d6220d6 | 3647 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c JB |
3648 | |
3649 | ret = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, | |
3650 | &data_ac, &meta_ac); | |
01225596 TM |
3651 | if (ret) { |
3652 | mlog_errno(ret); | |
3653 | goto leave; | |
3654 | } | |
3655 | ||
f99b9b7c JB |
3656 | credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
3657 | clusters_to_add); | |
01225596 TM |
3658 | handle = ocfs2_start_trans(osb, credits); |
3659 | if (IS_ERR(handle)) { | |
3660 | ret = PTR_ERR(handle); | |
3661 | handle = NULL; | |
3662 | mlog_errno(ret); | |
3663 | goto leave; | |
3664 | } | |
3665 | ||
3666 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
3667 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3668 | if (ret < 0) { | |
3669 | mlog_errno(ret); | |
3670 | goto leave; | |
3671 | } | |
3672 | ||
3673 | ret = __ocfs2_claim_clusters(osb, handle, data_ac, 1, | |
3674 | clusters_to_add, &bit_off, &num_bits); | |
3675 | if (ret < 0) { | |
3676 | if (ret != -ENOSPC) | |
3677 | mlog_errno(ret); | |
3678 | goto leave; | |
3679 | } | |
3680 | ||
3681 | BUG_ON(num_bits > clusters_to_add); | |
3682 | ||
3683 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
3684 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
3685 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
3686 | ||
3687 | if (prev_blkno + prev_clusters * bpc == block && | |
3688 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= | |
3689 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
3690 | /* | |
3691 | * If this cluster is contiguous with the old one and | |
3692 | * adding this new cluster, we don't surpass the limit of | |
3693 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
3694 | * initialized and used like other buckets in the previous | |
3695 | * cluster. | |
3696 | * So add it as a contiguous one. The caller will handle | |
3697 | * its init process. | |
3698 | */ | |
3699 | v_start = prev_cpos + prev_clusters; | |
3700 | *num_clusters = prev_clusters + num_bits; | |
3701 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
3702 | num_bits); | |
3703 | } else { | |
3704 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
3705 | handle, | |
3706 | first_bh, | |
3707 | header_bh, | |
3708 | block, | |
3709 | prev_blkno, | |
3710 | prev_clusters, | |
3711 | &v_start, | |
3712 | extend); | |
3713 | if (ret) { | |
3714 | mlog_errno(ret); | |
3715 | goto leave; | |
3716 | } | |
3717 | } | |
3718 | ||
28b8ca0b TM |
3719 | if (handle->h_buffer_credits < credits) { |
3720 | /* | |
3721 | * The journal has been restarted before, and don't | |
3722 | * have enough space for the insertion, so extend it | |
3723 | * here. | |
3724 | */ | |
3725 | ret = ocfs2_extend_trans(handle, credits); | |
3726 | if (ret) { | |
3727 | mlog_errno(ret); | |
3728 | goto leave; | |
3729 | } | |
3730 | } | |
01225596 TM |
3731 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", |
3732 | num_bits, block, v_start); | |
f99b9b7c JB |
3733 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
3734 | num_bits, 0, meta_ac); | |
01225596 TM |
3735 | if (ret < 0) { |
3736 | mlog_errno(ret); | |
3737 | goto leave; | |
3738 | } | |
3739 | ||
3740 | ret = ocfs2_journal_dirty(handle, root_bh); | |
3741 | if (ret < 0) { | |
3742 | mlog_errno(ret); | |
3743 | goto leave; | |
3744 | } | |
3745 | ||
3746 | leave: | |
3747 | if (handle) | |
3748 | ocfs2_commit_trans(osb, handle); | |
3749 | if (data_ac) | |
3750 | ocfs2_free_alloc_context(data_ac); | |
3751 | if (meta_ac) | |
3752 | ocfs2_free_alloc_context(meta_ac); | |
3753 | ||
3754 | return ret; | |
3755 | } | |
3756 | ||
3757 | /* | |
3758 | * Extend a new xattr bucket and move xattrs to the end one by one until | |
3759 | * We meet with start_bh. Only move half of the xattrs to the bucket after it. | |
3760 | */ | |
3761 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
3762 | struct buffer_head *first_bh, | |
3763 | struct buffer_head *start_bh, | |
3764 | u32 num_clusters) | |
3765 | { | |
3766 | int ret, credits; | |
3767 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3768 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3769 | u64 start_blk = start_bh->b_blocknr, end_blk; | |
3770 | u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); | |
3771 | handle_t *handle; | |
3772 | struct ocfs2_xattr_header *first_xh = | |
3773 | (struct ocfs2_xattr_header *)first_bh->b_data; | |
3774 | u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); | |
3775 | ||
3776 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
3777 | "from %llu, len = %u\n", start_blk, | |
3778 | (unsigned long long)first_bh->b_blocknr, num_clusters); | |
3779 | ||
3780 | BUG_ON(bucket >= num_buckets); | |
3781 | ||
3782 | end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; | |
3783 | ||
3784 | /* | |
3785 | * We will touch all the buckets after the start_bh(include it). | |
3786 | * Add one more bucket and modify the first_bh. | |
3787 | */ | |
3788 | credits = end_blk - start_blk + 2 * blk_per_bucket + 1; | |
3789 | handle = ocfs2_start_trans(osb, credits); | |
3790 | if (IS_ERR(handle)) { | |
3791 | ret = PTR_ERR(handle); | |
3792 | handle = NULL; | |
3793 | mlog_errno(ret); | |
3794 | goto out; | |
3795 | } | |
3796 | ||
3797 | ret = ocfs2_journal_access(handle, inode, first_bh, | |
3798 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3799 | if (ret) { | |
3800 | mlog_errno(ret); | |
3801 | goto commit; | |
3802 | } | |
3803 | ||
3804 | while (end_blk != start_blk) { | |
3805 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, | |
3806 | end_blk + blk_per_bucket, 0); | |
3807 | if (ret) | |
3808 | goto commit; | |
3809 | end_blk -= blk_per_bucket; | |
3810 | } | |
3811 | ||
3812 | /* Move half of the xattr in start_blk to the next bucket. */ | |
3813 | ret = ocfs2_half_xattr_bucket(inode, handle, start_blk, | |
3814 | start_blk + blk_per_bucket, NULL, 0); | |
3815 | ||
3816 | le16_add_cpu(&first_xh->xh_num_buckets, 1); | |
3817 | ocfs2_journal_dirty(handle, first_bh); | |
3818 | ||
3819 | commit: | |
3820 | ocfs2_commit_trans(osb, handle); | |
3821 | out: | |
3822 | return ret; | |
3823 | } | |
3824 | ||
3825 | /* | |
3826 | * Add new xattr bucket in an extent record and adjust the buckets accordingly. | |
3827 | * xb_bh is the ocfs2_xattr_block. | |
3828 | * We will move all the buckets starting from header_bh to the next place. As | |
3829 | * for this one, half num of its xattrs will be moved to the next one. | |
3830 | * | |
3831 | * We will allocate a new cluster if current cluster is full and adjust | |
3832 | * header_bh and first_bh if the insert place is moved to the new cluster. | |
3833 | */ | |
3834 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
3835 | struct buffer_head *xb_bh, | |
3836 | struct buffer_head *header_bh) | |
3837 | { | |
3838 | struct ocfs2_xattr_header *first_xh = NULL; | |
3839 | struct buffer_head *first_bh = NULL; | |
3840 | struct ocfs2_xattr_block *xb = | |
3841 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3842 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3843 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3844 | struct ocfs2_xattr_header *xh = | |
3845 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
3846 | u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3847 | struct super_block *sb = inode->i_sb; | |
3848 | struct ocfs2_super *osb = OCFS2_SB(sb); | |
3849 | int ret, num_buckets, extend = 1; | |
3850 | u64 p_blkno; | |
3851 | u32 e_cpos, num_clusters; | |
3852 | ||
3853 | mlog(0, "Add new xattr bucket starting form %llu\n", | |
3854 | (unsigned long long)header_bh->b_blocknr); | |
3855 | ||
3856 | /* | |
3857 | * Add refrence for header_bh here because it may be | |
3858 | * changed in ocfs2_add_new_xattr_cluster and we need | |
3859 | * to free it in the end. | |
3860 | */ | |
3861 | get_bh(header_bh); | |
3862 | ||
3863 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, | |
3864 | &num_clusters, el); | |
3865 | if (ret) { | |
3866 | mlog_errno(ret); | |
3867 | goto out; | |
3868 | } | |
3869 | ||
0fcaa56a | 3870 | ret = ocfs2_read_block(inode, p_blkno, &first_bh); |
01225596 TM |
3871 | if (ret) { |
3872 | mlog_errno(ret); | |
3873 | goto out; | |
3874 | } | |
3875 | ||
3876 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; | |
3877 | first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; | |
3878 | ||
3879 | if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { | |
3880 | ret = ocfs2_add_new_xattr_cluster(inode, | |
3881 | xb_bh, | |
3882 | &first_bh, | |
3883 | &header_bh, | |
3884 | &num_clusters, | |
3885 | e_cpos, | |
3886 | p_blkno, | |
3887 | &extend); | |
3888 | if (ret) { | |
3889 | mlog_errno(ret); | |
3890 | goto out; | |
3891 | } | |
3892 | } | |
3893 | ||
3894 | if (extend) | |
3895 | ret = ocfs2_extend_xattr_bucket(inode, | |
3896 | first_bh, | |
3897 | header_bh, | |
3898 | num_clusters); | |
3899 | if (ret) | |
3900 | mlog_errno(ret); | |
3901 | out: | |
3902 | brelse(first_bh); | |
3903 | brelse(header_bh); | |
3904 | return ret; | |
3905 | } | |
3906 | ||
3907 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
3908 | struct ocfs2_xattr_bucket *bucket, | |
3909 | int offs) | |
3910 | { | |
3911 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
3912 | ||
3913 | offs = offs % inode->i_sb->s_blocksize; | |
3914 | return bucket->bhs[block_off]->b_data + offs; | |
3915 | } | |
3916 | ||
3917 | /* | |
3918 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
3919 | * |
3920 | * Note: "local" indicates the real data's locality. So we can't | |
3921 | * just its bucket locality by its length. | |
3922 | */ | |
3923 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
3924 | struct ocfs2_xattr_info *xi, | |
3925 | struct ocfs2_xattr_search *xs, | |
3926 | u32 name_hash, | |
5a095611 | 3927 | int local) |
01225596 TM |
3928 | { |
3929 | struct ocfs2_xattr_entry *last, *xe; | |
3930 | int name_len = strlen(xi->name); | |
3931 | struct ocfs2_xattr_header *xh = xs->header; | |
3932 | u16 count = le16_to_cpu(xh->xh_count), start; | |
3933 | size_t blocksize = inode->i_sb->s_blocksize; | |
3934 | char *val; | |
3935 | size_t offs, size, new_size; | |
3936 | ||
3937 | last = &xh->xh_entries[count]; | |
3938 | if (!xs->not_found) { | |
3939 | xe = xs->here; | |
3940 | offs = le16_to_cpu(xe->xe_name_offset); | |
3941 | if (ocfs2_xattr_is_local(xe)) | |
3942 | size = OCFS2_XATTR_SIZE(name_len) + | |
3943 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3944 | else | |
3945 | size = OCFS2_XATTR_SIZE(name_len) + | |
3946 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
3947 | ||
3948 | /* | |
3949 | * If the new value will be stored outside, xi->value has been | |
3950 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
3951 | * goes with xi->value_len, so we can set new_size safely here. | |
3952 | * See ocfs2_xattr_set_in_bucket. | |
3953 | */ | |
3954 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
3955 | OCFS2_XATTR_SIZE(xi->value_len); | |
3956 | ||
3957 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
3958 | if (xi->value) { | |
3959 | if (new_size > size) | |
3960 | goto set_new_name_value; | |
3961 | ||
3962 | /* Now replace the old value with new one. */ | |
3963 | if (local) | |
3964 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
3965 | else | |
3966 | xe->xe_value_size = 0; | |
3967 | ||
3968 | val = ocfs2_xattr_bucket_get_val(inode, | |
3969 | &xs->bucket, offs); | |
3970 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, | |
3971 | size - OCFS2_XATTR_SIZE(name_len)); | |
3972 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
3973 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
3974 | xi->value, xi->value_len); | |
3975 | ||
3976 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
3977 | ocfs2_xattr_set_local(xe, local); | |
3978 | return; | |
3979 | } else { | |
5a095611 TM |
3980 | /* |
3981 | * Remove the old entry if there is more than one. | |
3982 | * We don't remove the last entry so that we can | |
3983 | * use it to indicate the hash value of the empty | |
3984 | * bucket. | |
3985 | */ | |
01225596 | 3986 | last -= 1; |
01225596 | 3987 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
3988 | if (xh->xh_count) { |
3989 | memmove(xe, xe + 1, | |
3990 | (void *)last - (void *)xe); | |
3991 | memset(last, 0, | |
3992 | sizeof(struct ocfs2_xattr_entry)); | |
3993 | } else | |
3994 | xh->xh_free_start = | |
3995 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3996 | ||
01225596 TM |
3997 | return; |
3998 | } | |
3999 | } else { | |
4000 | /* find a new entry for insert. */ | |
4001 | int low = 0, high = count - 1, tmp; | |
4002 | struct ocfs2_xattr_entry *tmp_xe; | |
4003 | ||
5a095611 | 4004 | while (low <= high && count) { |
01225596 TM |
4005 | tmp = (low + high) / 2; |
4006 | tmp_xe = &xh->xh_entries[tmp]; | |
4007 | ||
4008 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4009 | low = tmp + 1; | |
4010 | else if (name_hash < | |
4011 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4012 | high = tmp - 1; | |
06b240d8 TM |
4013 | else { |
4014 | low = tmp; | |
01225596 | 4015 | break; |
06b240d8 | 4016 | } |
01225596 TM |
4017 | } |
4018 | ||
4019 | xe = &xh->xh_entries[low]; | |
4020 | if (low != count) | |
4021 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4022 | ||
4023 | le16_add_cpu(&xh->xh_count, 1); | |
4024 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4025 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4026 | xe->xe_name_len = name_len; | |
4027 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4028 | } | |
4029 | ||
4030 | set_new_name_value: | |
4031 | /* Insert the new name+value. */ | |
4032 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4033 | ||
4034 | /* | |
4035 | * We must make sure that the name/value pair | |
4036 | * exists in the same block. | |
4037 | */ | |
4038 | offs = le16_to_cpu(xh->xh_free_start); | |
4039 | start = offs - size; | |
4040 | ||
4041 | if (start >> inode->i_sb->s_blocksize_bits != | |
4042 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4043 | offs = offs - offs % blocksize; | |
4044 | xh->xh_free_start = cpu_to_le16(offs); | |
4045 | } | |
4046 | ||
4047 | val = ocfs2_xattr_bucket_get_val(inode, | |
4048 | &xs->bucket, offs - size); | |
4049 | xe->xe_name_offset = cpu_to_le16(offs - size); | |
4050 | ||
4051 | memset(val, 0, size); | |
4052 | memcpy(val, xi->name, name_len); | |
4053 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4054 | ||
4055 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4056 | ocfs2_xattr_set_local(xe, local); | |
4057 | xs->here = xe; | |
4058 | le16_add_cpu(&xh->xh_free_start, -size); | |
4059 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4060 | ||
4061 | return; | |
4062 | } | |
4063 | ||
4064 | static int ocfs2_xattr_bucket_handle_journal(struct inode *inode, | |
4065 | handle_t *handle, | |
4066 | struct ocfs2_xattr_search *xs, | |
4067 | struct buffer_head **bhs, | |
4068 | u16 bh_num) | |
4069 | { | |
4070 | int ret = 0, off, block_off; | |
4071 | struct ocfs2_xattr_entry *xe = xs->here; | |
4072 | ||
4073 | /* | |
4074 | * First calculate all the blocks we should journal_access | |
4075 | * and journal_dirty. The first block should always be touched. | |
4076 | */ | |
4077 | ret = ocfs2_journal_dirty(handle, bhs[0]); | |
4078 | if (ret) | |
4079 | mlog_errno(ret); | |
4080 | ||
4081 | /* calc the data. */ | |
4082 | off = le16_to_cpu(xe->xe_name_offset); | |
4083 | block_off = off >> inode->i_sb->s_blocksize_bits; | |
4084 | ret = ocfs2_journal_dirty(handle, bhs[block_off]); | |
4085 | if (ret) | |
4086 | mlog_errno(ret); | |
4087 | ||
4088 | return ret; | |
4089 | } | |
4090 | ||
4091 | /* | |
4092 | * Set the xattr entry in the specified bucket. | |
4093 | * The bucket is indicated by xs->bucket and it should have the enough | |
4094 | * space for the xattr insertion. | |
4095 | */ | |
4096 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
4097 | struct ocfs2_xattr_info *xi, | |
4098 | struct ocfs2_xattr_search *xs, | |
4099 | u32 name_hash, | |
5a095611 | 4100 | int local) |
01225596 TM |
4101 | { |
4102 | int i, ret; | |
4103 | handle_t *handle = NULL; | |
4104 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4105 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4106 | ||
ff1ec20e MF |
4107 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4108 | (unsigned long)xi->value_len, xi->name_index, | |
01225596 TM |
4109 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr); |
4110 | ||
4111 | if (!xs->bucket.bhs[1]) { | |
31d33073 | 4112 | ret = ocfs2_read_blocks(inode, |
01225596 TM |
4113 | xs->bucket.bhs[0]->b_blocknr + 1, |
4114 | blk_per_bucket - 1, &xs->bucket.bhs[1], | |
1efd47f8 | 4115 | 0); |
01225596 TM |
4116 | if (ret) { |
4117 | mlog_errno(ret); | |
4118 | goto out; | |
4119 | } | |
4120 | } | |
4121 | ||
4122 | handle = ocfs2_start_trans(osb, blk_per_bucket); | |
4123 | if (IS_ERR(handle)) { | |
4124 | ret = PTR_ERR(handle); | |
4125 | handle = NULL; | |
4126 | mlog_errno(ret); | |
4127 | goto out; | |
4128 | } | |
4129 | ||
4130 | for (i = 0; i < blk_per_bucket; i++) { | |
4131 | ret = ocfs2_journal_access(handle, inode, xs->bucket.bhs[i], | |
4132 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4133 | if (ret < 0) { | |
4134 | mlog_errno(ret); | |
4135 | goto out; | |
4136 | } | |
4137 | } | |
4138 | ||
5a095611 | 4139 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
01225596 TM |
4140 | |
4141 | /*Only dirty the blocks we have touched in set xattr. */ | |
4142 | ret = ocfs2_xattr_bucket_handle_journal(inode, handle, xs, | |
4143 | xs->bucket.bhs, blk_per_bucket); | |
4144 | if (ret) | |
4145 | mlog_errno(ret); | |
4146 | out: | |
4147 | ocfs2_commit_trans(osb, handle); | |
4148 | ||
4149 | return ret; | |
4150 | } | |
4151 | ||
4152 | static int ocfs2_xattr_value_update_size(struct inode *inode, | |
4153 | struct buffer_head *xe_bh, | |
4154 | struct ocfs2_xattr_entry *xe, | |
4155 | u64 new_size) | |
4156 | { | |
4157 | int ret; | |
4158 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4159 | handle_t *handle = NULL; | |
4160 | ||
4161 | handle = ocfs2_start_trans(osb, 1); | |
4162 | if (handle == NULL) { | |
4163 | ret = -ENOMEM; | |
4164 | mlog_errno(ret); | |
4165 | goto out; | |
4166 | } | |
4167 | ||
4168 | ret = ocfs2_journal_access(handle, inode, xe_bh, | |
4169 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4170 | if (ret < 0) { | |
4171 | mlog_errno(ret); | |
4172 | goto out_commit; | |
4173 | } | |
4174 | ||
4175 | xe->xe_value_size = cpu_to_le64(new_size); | |
4176 | ||
4177 | ret = ocfs2_journal_dirty(handle, xe_bh); | |
4178 | if (ret < 0) | |
4179 | mlog_errno(ret); | |
4180 | ||
4181 | out_commit: | |
4182 | ocfs2_commit_trans(osb, handle); | |
4183 | out: | |
4184 | return ret; | |
4185 | } | |
4186 | ||
4187 | /* | |
4188 | * Truncate the specified xe_off entry in xattr bucket. | |
4189 | * bucket is indicated by header_bh and len is the new length. | |
4190 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4191 | * | |
4192 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4193 | */ | |
4194 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
4195 | struct buffer_head *header_bh, | |
4196 | int xe_off, | |
4197 | int len) | |
4198 | { | |
4199 | int ret, offset; | |
4200 | u64 value_blk; | |
4201 | struct buffer_head *value_bh = NULL; | |
4202 | struct ocfs2_xattr_value_root *xv; | |
4203 | struct ocfs2_xattr_entry *xe; | |
4204 | struct ocfs2_xattr_header *xh = | |
4205 | (struct ocfs2_xattr_header *)header_bh->b_data; | |
4206 | size_t blocksize = inode->i_sb->s_blocksize; | |
4207 | ||
4208 | xe = &xh->xh_entries[xe_off]; | |
4209 | ||
4210 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4211 | ||
4212 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4213 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4214 | ||
4215 | value_blk = offset / blocksize; | |
4216 | ||
4217 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4218 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
4219 | value_blk += header_bh->b_blocknr; | |
4220 | ||
0fcaa56a | 4221 | ret = ocfs2_read_block(inode, value_blk, &value_bh); |
01225596 TM |
4222 | if (ret) { |
4223 | mlog_errno(ret); | |
4224 | goto out; | |
4225 | } | |
4226 | ||
4227 | xv = (struct ocfs2_xattr_value_root *) | |
4228 | (value_bh->b_data + offset % blocksize); | |
4229 | ||
4230 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4231 | xe_off, (unsigned long long)header_bh->b_blocknr, len); | |
4232 | ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len); | |
4233 | if (ret) { | |
4234 | mlog_errno(ret); | |
4235 | goto out; | |
4236 | } | |
4237 | ||
4238 | ret = ocfs2_xattr_value_update_size(inode, header_bh, xe, len); | |
4239 | if (ret) { | |
4240 | mlog_errno(ret); | |
4241 | goto out; | |
4242 | } | |
4243 | ||
4244 | out: | |
4245 | brelse(value_bh); | |
4246 | return ret; | |
4247 | } | |
4248 | ||
4249 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
4250 | struct ocfs2_xattr_search *xs, | |
4251 | int len) | |
4252 | { | |
4253 | int ret, offset; | |
4254 | struct ocfs2_xattr_entry *xe = xs->here; | |
4255 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4256 | ||
4257 | BUG_ON(!xs->bucket.bhs[0] || !xe || ocfs2_xattr_is_local(xe)); | |
4258 | ||
4259 | offset = xe - xh->xh_entries; | |
4260 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket.bhs[0], | |
4261 | offset, len); | |
4262 | if (ret) | |
4263 | mlog_errno(ret); | |
4264 | ||
4265 | return ret; | |
4266 | } | |
4267 | ||
4268 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
4269 | struct ocfs2_xattr_search *xs, | |
4270 | char *val, | |
4271 | int value_len) | |
4272 | { | |
4273 | int offset; | |
4274 | struct ocfs2_xattr_value_root *xv; | |
4275 | struct ocfs2_xattr_entry *xe = xs->here; | |
4276 | ||
4277 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4278 | ||
4279 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4280 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4281 | ||
4282 | xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); | |
4283 | ||
4284 | return __ocfs2_xattr_set_value_outside(inode, xv, val, value_len); | |
4285 | } | |
4286 | ||
01225596 TM |
4287 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4288 | struct buffer_head *root_bh, | |
4289 | u64 blkno, | |
4290 | u32 cpos, | |
4291 | u32 len) | |
4292 | { | |
4293 | int ret; | |
4294 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4295 | struct inode *tl_inode = osb->osb_tl_inode; | |
4296 | handle_t *handle; | |
4297 | struct ocfs2_xattr_block *xb = | |
4298 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4299 | struct ocfs2_alloc_context *meta_ac = NULL; |
4300 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4301 | struct ocfs2_extent_tree et; |
4302 | ||
8d6220d6 | 4303 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4304 | |
4305 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4306 | ||
4307 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4308 | cpos, len, (unsigned long long)blkno); | |
4309 | ||
4310 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4311 | ||
f99b9b7c | 4312 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4313 | if (ret) { |
4314 | mlog_errno(ret); | |
4315 | return ret; | |
4316 | } | |
4317 | ||
4318 | mutex_lock(&tl_inode->i_mutex); | |
4319 | ||
4320 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4321 | ret = __ocfs2_flush_truncate_log(osb); | |
4322 | if (ret < 0) { | |
4323 | mlog_errno(ret); | |
4324 | goto out; | |
4325 | } | |
4326 | } | |
4327 | ||
4328 | handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); | |
4329 | if (handle == NULL) { | |
4330 | ret = -ENOMEM; | |
4331 | mlog_errno(ret); | |
4332 | goto out; | |
4333 | } | |
4334 | ||
4335 | ret = ocfs2_journal_access(handle, inode, root_bh, | |
4336 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4337 | if (ret) { | |
4338 | mlog_errno(ret); | |
4339 | goto out_commit; | |
4340 | } | |
4341 | ||
f99b9b7c JB |
4342 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4343 | &dealloc); | |
01225596 TM |
4344 | if (ret) { |
4345 | mlog_errno(ret); | |
4346 | goto out_commit; | |
4347 | } | |
4348 | ||
4349 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4350 | ||
4351 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4352 | if (ret) { | |
4353 | mlog_errno(ret); | |
4354 | goto out_commit; | |
4355 | } | |
4356 | ||
4357 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4358 | if (ret) | |
4359 | mlog_errno(ret); | |
4360 | ||
4361 | out_commit: | |
4362 | ocfs2_commit_trans(osb, handle); | |
4363 | out: | |
4364 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4365 | ||
4366 | mutex_unlock(&tl_inode->i_mutex); | |
4367 | ||
4368 | if (meta_ac) | |
4369 | ocfs2_free_alloc_context(meta_ac); | |
4370 | ||
4371 | ocfs2_run_deallocs(osb, &dealloc); | |
4372 | ||
4373 | return ret; | |
4374 | } | |
4375 | ||
01225596 TM |
4376 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
4377 | struct ocfs2_xattr_search *xs) | |
4378 | { | |
4379 | handle_t *handle = NULL; | |
4380 | struct ocfs2_xattr_header *xh = xs->bucket.xh; | |
4381 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ | |
4382 | le16_to_cpu(xh->xh_count) - 1]; | |
4383 | int ret = 0; | |
4384 | ||
4385 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), 1); | |
4386 | if (IS_ERR(handle)) { | |
4387 | ret = PTR_ERR(handle); | |
4388 | mlog_errno(ret); | |
4389 | return; | |
4390 | } | |
4391 | ||
4392 | ret = ocfs2_journal_access(handle, inode, xs->bucket.bhs[0], | |
4393 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4394 | if (ret) { | |
4395 | mlog_errno(ret); | |
4396 | goto out_commit; | |
4397 | } | |
4398 | ||
4399 | /* Remove the old entry. */ | |
4400 | memmove(xs->here, xs->here + 1, | |
4401 | (void *)last - (void *)xs->here); | |
4402 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4403 | le16_add_cpu(&xh->xh_count, -1); | |
4404 | ||
4405 | ret = ocfs2_journal_dirty(handle, xs->bucket.bhs[0]); | |
4406 | if (ret < 0) | |
4407 | mlog_errno(ret); | |
4408 | out_commit: | |
4409 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
4410 | } | |
4411 | ||
4412 | /* | |
4413 | * Set the xattr name/value in the bucket specified in xs. | |
4414 | * | |
4415 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4416 | * we divide the whole process into 3 steps: | |
4417 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4418 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4419 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4420 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4421 | * to free the xattr we allocated in set. | |
4422 | */ | |
4423 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4424 | struct ocfs2_xattr_info *xi, | |
4425 | struct ocfs2_xattr_search *xs) | |
4426 | { | |
5a095611 | 4427 | int ret, local = 1; |
01225596 TM |
4428 | size_t value_len; |
4429 | char *val = (char *)xi->value; | |
4430 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4431 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4432 | strlen(xi->name)); | |
01225596 TM |
4433 | |
4434 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4435 | /* | |
4436 | * We need to truncate the xattr storage first. | |
4437 | * | |
4438 | * If both the old and new value are stored to | |
4439 | * outside block, we only need to truncate | |
4440 | * the storage and then set the value outside. | |
4441 | * | |
4442 | * If the new value should be stored within block, | |
4443 | * we should free all the outside block first and | |
4444 | * the modification to the xattr block will be done | |
4445 | * by following steps. | |
4446 | */ | |
4447 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4448 | value_len = xi->value_len; | |
4449 | else | |
4450 | value_len = 0; | |
4451 | ||
4452 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4453 | value_len); | |
4454 | if (ret) | |
4455 | goto out; | |
4456 | ||
4457 | if (value_len) | |
4458 | goto set_value_outside; | |
4459 | } | |
4460 | ||
4461 | value_len = xi->value_len; | |
4462 | /* So we have to handle the inside block change now. */ | |
4463 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4464 | /* | |
4465 | * If the new value will be stored outside of block, | |
4466 | * initalize a new empty value root and insert it first. | |
4467 | */ | |
4468 | local = 0; | |
4469 | xi->value = &def_xv; | |
4470 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
4471 | } | |
4472 | ||
5a095611 | 4473 | ret = ocfs2_xattr_set_entry_in_bucket(inode, xi, xs, name_hash, local); |
01225596 TM |
4474 | if (ret) { |
4475 | mlog_errno(ret); | |
4476 | goto out; | |
4477 | } | |
4478 | ||
5a095611 TM |
4479 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
4480 | goto out; | |
01225596 | 4481 | |
5a095611 TM |
4482 | /* allocate the space now for the outside block storage. */ |
4483 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
4484 | value_len); | |
4485 | if (ret) { | |
4486 | mlog_errno(ret); | |
4487 | ||
4488 | if (xs->not_found) { | |
4489 | /* | |
4490 | * We can't allocate enough clusters for outside | |
4491 | * storage and we have allocated xattr already, | |
4492 | * so need to remove it. | |
4493 | */ | |
4494 | ocfs2_xattr_bucket_remove_xs(inode, xs); | |
01225596 | 4495 | } |
01225596 TM |
4496 | goto out; |
4497 | } | |
4498 | ||
4499 | set_value_outside: | |
4500 | ret = ocfs2_xattr_bucket_set_value_outside(inode, xs, val, value_len); | |
4501 | out: | |
4502 | return ret; | |
4503 | } | |
4504 | ||
4505 | /* check whether the xattr bucket is filled up with the same hash value. */ | |
4506 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, | |
4507 | struct ocfs2_xattr_bucket *bucket) | |
4508 | { | |
4509 | struct ocfs2_xattr_header *xh = bucket->xh; | |
4510 | ||
4511 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
4512 | xh->xh_entries[0].xe_name_hash) { | |
4513 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
4514 | "hash = %u\n", | |
4515 | (unsigned long long)bucket->bhs[0]->b_blocknr, | |
4516 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); | |
4517 | return -ENOSPC; | |
4518 | } | |
4519 | ||
4520 | return 0; | |
4521 | } | |
4522 | ||
4523 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
4524 | struct ocfs2_xattr_info *xi, | |
4525 | struct ocfs2_xattr_search *xs) | |
4526 | { | |
4527 | struct ocfs2_xattr_header *xh; | |
4528 | struct ocfs2_xattr_entry *xe; | |
4529 | u16 count, header_size, xh_free_start; | |
4530 | int i, free, max_free, need, old; | |
4531 | size_t value_size = 0, name_len = strlen(xi->name); | |
4532 | size_t blocksize = inode->i_sb->s_blocksize; | |
4533 | int ret, allocation = 0; | |
4534 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
4535 | ||
4536 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
4537 | ||
4538 | try_again: | |
4539 | xh = xs->header; | |
4540 | count = le16_to_cpu(xh->xh_count); | |
4541 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4542 | header_size = sizeof(struct ocfs2_xattr_header) + | |
4543 | count * sizeof(struct ocfs2_xattr_entry); | |
4544 | max_free = OCFS2_XATTR_BUCKET_SIZE - | |
4545 | le16_to_cpu(xh->xh_name_value_len) - header_size; | |
4546 | ||
4547 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
4548 | "of %u which exceed block size\n", | |
4549 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr, | |
4550 | header_size); | |
4551 | ||
4552 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4553 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
4554 | else if (xi->value) | |
4555 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
4556 | ||
4557 | if (xs->not_found) | |
4558 | need = sizeof(struct ocfs2_xattr_entry) + | |
4559 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
4560 | else { | |
4561 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
4562 | ||
4563 | /* | |
4564 | * We only replace the old value if the new length is smaller | |
4565 | * than the old one. Otherwise we will allocate new space in the | |
4566 | * bucket to store it. | |
4567 | */ | |
4568 | xe = xs->here; | |
4569 | if (ocfs2_xattr_is_local(xe)) | |
4570 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4571 | else | |
4572 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4573 | ||
4574 | if (old >= value_size) | |
4575 | need = 0; | |
4576 | } | |
4577 | ||
4578 | free = xh_free_start - header_size; | |
4579 | /* | |
4580 | * We need to make sure the new name/value pair | |
4581 | * can exist in the same block. | |
4582 | */ | |
4583 | if (xh_free_start % blocksize < need) | |
4584 | free -= xh_free_start % blocksize; | |
4585 | ||
4586 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
4587 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
4588 | " %u\n", xs->not_found, | |
4589 | (unsigned long long)xs->bucket.bhs[0]->b_blocknr, | |
4590 | free, need, max_free, le16_to_cpu(xh->xh_free_start), | |
4591 | le16_to_cpu(xh->xh_name_value_len)); | |
4592 | ||
4593 | if (free < need || count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4594 | if (need <= max_free && | |
4595 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
4596 | /* | |
4597 | * We can create the space by defragment. Since only the | |
4598 | * name/value will be moved, the xe shouldn't be changed | |
4599 | * in xs. | |
4600 | */ | |
4601 | ret = ocfs2_defrag_xattr_bucket(inode, &xs->bucket); | |
4602 | if (ret) { | |
4603 | mlog_errno(ret); | |
4604 | goto out; | |
4605 | } | |
4606 | ||
4607 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4608 | free = xh_free_start - header_size; | |
4609 | if (xh_free_start % blocksize < need) | |
4610 | free -= xh_free_start % blocksize; | |
4611 | ||
4612 | if (free >= need) | |
4613 | goto xattr_set; | |
4614 | ||
4615 | mlog(0, "Can't get enough space for xattr insert by " | |
4616 | "defragment. Need %u bytes, but we have %d, so " | |
4617 | "allocate new bucket for it.\n", need, free); | |
4618 | } | |
4619 | ||
4620 | /* | |
4621 | * We have to add new buckets or clusters and one | |
4622 | * allocation should leave us enough space for insert. | |
4623 | */ | |
4624 | BUG_ON(allocation); | |
4625 | ||
4626 | /* | |
4627 | * We do not allow for overlapping ranges between buckets. And | |
4628 | * the maximum number of collisions we will allow for then is | |
4629 | * one bucket's worth, so check it here whether we need to | |
4630 | * add a new bucket for the insert. | |
4631 | */ | |
4632 | ret = ocfs2_check_xattr_bucket_collision(inode, &xs->bucket); | |
4633 | if (ret) { | |
4634 | mlog_errno(ret); | |
4635 | goto out; | |
4636 | } | |
4637 | ||
4638 | ret = ocfs2_add_new_xattr_bucket(inode, | |
4639 | xs->xattr_bh, | |
4640 | xs->bucket.bhs[0]); | |
4641 | if (ret) { | |
4642 | mlog_errno(ret); | |
4643 | goto out; | |
4644 | } | |
4645 | ||
4646 | for (i = 0; i < blk_per_bucket; i++) | |
4647 | brelse(xs->bucket.bhs[i]); | |
4648 | ||
4649 | memset(&xs->bucket, 0, sizeof(xs->bucket)); | |
4650 | ||
4651 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
4652 | xi->name_index, | |
4653 | xi->name, xs); | |
4654 | if (ret && ret != -ENODATA) | |
4655 | goto out; | |
4656 | xs->not_found = ret; | |
4657 | allocation = 1; | |
4658 | goto try_again; | |
4659 | } | |
4660 | ||
4661 | xattr_set: | |
4662 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs); | |
4663 | out: | |
4664 | mlog_exit(ret); | |
4665 | return ret; | |
4666 | } | |
a3944256 TM |
4667 | |
4668 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
4669 | struct ocfs2_xattr_bucket *bucket, | |
4670 | void *para) | |
4671 | { | |
4672 | int ret = 0; | |
4673 | struct ocfs2_xattr_header *xh = bucket->xh; | |
4674 | u16 i; | |
4675 | struct ocfs2_xattr_entry *xe; | |
4676 | ||
4677 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4678 | xe = &xh->xh_entries[i]; | |
4679 | if (ocfs2_xattr_is_local(xe)) | |
4680 | continue; | |
4681 | ||
4682 | ret = ocfs2_xattr_bucket_value_truncate(inode, | |
4683 | bucket->bhs[0], | |
4684 | i, 0); | |
4685 | if (ret) { | |
4686 | mlog_errno(ret); | |
4687 | break; | |
4688 | } | |
4689 | } | |
4690 | ||
4691 | return ret; | |
4692 | } | |
4693 | ||
4694 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
4695 | struct buffer_head *xb_bh) | |
4696 | { | |
4697 | struct ocfs2_xattr_block *xb = | |
4698 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4699 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
4700 | int ret = 0; | |
4701 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
4702 | u64 p_blkno; | |
4703 | ||
4704 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
4705 | return 0; | |
4706 | ||
4707 | while (name_hash > 0) { | |
4708 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4709 | &e_cpos, &num_clusters, el); | |
4710 | if (ret) { | |
4711 | mlog_errno(ret); | |
4712 | goto out; | |
4713 | } | |
4714 | ||
4715 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
4716 | ocfs2_delete_xattr_in_bucket, | |
4717 | NULL); | |
4718 | if (ret) { | |
4719 | mlog_errno(ret); | |
4720 | goto out; | |
4721 | } | |
4722 | ||
4723 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
4724 | p_blkno, e_cpos, num_clusters); | |
4725 | if (ret) { | |
4726 | mlog_errno(ret); | |
4727 | break; | |
4728 | } | |
4729 | ||
4730 | if (e_cpos == 0) | |
4731 | break; | |
4732 | ||
4733 | name_hash = e_cpos - 1; | |
4734 | } | |
4735 | ||
4736 | out: | |
4737 | return ret; | |
4738 | } | |
99219aea MF |
4739 | |
4740 | /* | |
4741 | * 'trusted' attributes support | |
4742 | */ | |
99219aea MF |
4743 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
4744 | size_t list_size, const char *name, | |
4745 | size_t name_len) | |
4746 | { | |
ceb1eba3 | 4747 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
4748 | const size_t total_len = prefix_len + name_len + 1; |
4749 | ||
4750 | if (list && total_len <= list_size) { | |
4751 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
4752 | memcpy(list + prefix_len, name, name_len); | |
4753 | list[prefix_len + name_len] = '\0'; | |
4754 | } | |
4755 | return total_len; | |
4756 | } | |
4757 | ||
4758 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
4759 | void *buffer, size_t size) | |
4760 | { | |
4761 | if (strcmp(name, "") == 0) | |
4762 | return -EINVAL; | |
4763 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
4764 | buffer, size); | |
4765 | } | |
4766 | ||
4767 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
4768 | const void *value, size_t size, int flags) | |
4769 | { | |
4770 | if (strcmp(name, "") == 0) | |
4771 | return -EINVAL; | |
4772 | ||
4773 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
4774 | size, flags); | |
4775 | } | |
4776 | ||
4777 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
4778 | .prefix = XATTR_TRUSTED_PREFIX, | |
4779 | .list = ocfs2_xattr_trusted_list, | |
4780 | .get = ocfs2_xattr_trusted_get, | |
4781 | .set = ocfs2_xattr_trusted_set, | |
4782 | }; | |
4783 | ||
99219aea MF |
4784 | /* |
4785 | * 'user' attributes support | |
4786 | */ | |
99219aea MF |
4787 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
4788 | size_t list_size, const char *name, | |
4789 | size_t name_len) | |
4790 | { | |
ceb1eba3 | 4791 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
4792 | const size_t total_len = prefix_len + name_len + 1; |
4793 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4794 | ||
4795 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4796 | return 0; | |
4797 | ||
4798 | if (list && total_len <= list_size) { | |
4799 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
4800 | memcpy(list + prefix_len, name, name_len); | |
4801 | list[prefix_len + name_len] = '\0'; | |
4802 | } | |
4803 | return total_len; | |
4804 | } | |
4805 | ||
4806 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
4807 | void *buffer, size_t size) | |
4808 | { | |
4809 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4810 | ||
4811 | if (strcmp(name, "") == 0) | |
4812 | return -EINVAL; | |
4813 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4814 | return -EOPNOTSUPP; | |
4815 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
4816 | buffer, size); | |
4817 | } | |
4818 | ||
4819 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
4820 | const void *value, size_t size, int flags) | |
4821 | { | |
4822 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4823 | ||
4824 | if (strcmp(name, "") == 0) | |
4825 | return -EINVAL; | |
4826 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
4827 | return -EOPNOTSUPP; | |
4828 | ||
4829 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
4830 | size, flags); | |
4831 | } | |
4832 | ||
4833 | struct xattr_handler ocfs2_xattr_user_handler = { | |
4834 | .prefix = XATTR_USER_PREFIX, | |
4835 | .list = ocfs2_xattr_user_list, | |
4836 | .get = ocfs2_xattr_user_get, | |
4837 | .set = ocfs2_xattr_user_set, | |
4838 | }; |