projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
ocfs2: Pull ocfs2_xattr_value_buf up into ocfs2_xattr_value_truncate().
[deliverable/linux.git] / fs / ocfs2 / xattr.c
CommitLineData
f56654c4
TM		 1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * xattr.c
5 *
c3cb6827 6 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
f56654c4 7 *
cf1d6c76 8 * CREDITS:
c3cb6827
TY		 9 * Lots of code in this file is copy from linux/fs/ext3/xattr.c.
10 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
cf1d6c76 11 *
f56654c4
TM		 12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public
c3cb6827 14 * License version 2 as published by the Free Software Foundation.
f56654c4
TM		 15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
f56654c4
TM		 20 */
21
cf1d6c76
TY		 22#include <linux/capability.h>
23#include <linux/fs.h>
24#include <linux/types.h>
25#include <linux/slab.h>
26#include <linux/highmem.h>
27#include <linux/pagemap.h>
28#include <linux/uio.h>
29#include <linux/sched.h>
30#include <linux/splice.h>
31#include <linux/mount.h>
32#include <linux/writeback.h>
33#include <linux/falloc.h>
01225596 34#include <linux/sort.h>
99219aea
MF		 35#include <linux/init.h>
36#include <linux/module.h>
37#include <linux/string.h>
923f7f31 38#include <linux/security.h>
cf1d6c76 39
f56654c4
TM		 40#define MLOG_MASK_PREFIX ML_XATTR
41#include <cluster/masklog.h>
42
43#include "ocfs2.h"
44#include "alloc.h"
d6b32bbb 45#include "blockcheck.h"
f56654c4
TM		 46#include "dlmglue.h"
47#include "file.h"
cf1d6c76
TY		 48#include "symlink.h"
49#include "sysfile.h"
f56654c4
TM		 50#include "inode.h"
51#include "journal.h"
52#include "ocfs2_fs.h"
53#include "suballoc.h"
54#include "uptodate.h"
55#include "buffer_head_io.h"
0c044f0b 56#include "super.h"
cf1d6c76
TY		 57#include "xattr.h"
58
59
60struct ocfs2_xattr_def_value_root {
61 struct ocfs2_xattr_value_root xv;
62 struct ocfs2_extent_rec er;
63};
64
0c044f0b 65struct ocfs2_xattr_bucket {
ba937127
JB		 66 /* The inode these xattrs are associated with */
67 struct inode *bu_inode;
68
69 /* The actual buffers that make up the bucket */
4ac6032d 70 struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
ba937127
JB		 71
72 /* How many blocks make up one bucket for this filesystem */
73 int bu_blocks;
0c044f0b
TM		 74};
75
78f30c31 76struct ocfs2_xattr_set_ctxt {
85db90e7 77 handle_t *handle;
78f30c31
TM		 78 struct ocfs2_alloc_context *meta_ac;
79 struct ocfs2_alloc_context *data_ac;
80 struct ocfs2_cached_dealloc_ctxt dealloc;
81};
82
cf1d6c76
TY		 83#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
84#define OCFS2_XATTR_INLINE_SIZE 80
534eaddd
TY		 85#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
86 - sizeof(struct ocfs2_xattr_header) \
87 - sizeof(__u32))
89c38bd0
TY		 88#define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
89 - sizeof(struct ocfs2_xattr_block) \
90 - sizeof(struct ocfs2_xattr_header) \
91 - sizeof(__u32))
cf1d6c76
TY		 92
93static struct ocfs2_xattr_def_value_root def_xv = {
94 .xv.xr_list.l_count = cpu_to_le16(1),
95};
96
97struct xattr_handler *ocfs2_xattr_handlers[] = {
98 &ocfs2_xattr_user_handler,
929fb014
TY		 99#ifdef CONFIG_OCFS2_FS_POSIX_ACL
100 &ocfs2_xattr_acl_access_handler,
101 &ocfs2_xattr_acl_default_handler,
102#endif
cf1d6c76 103 &ocfs2_xattr_trusted_handler,
923f7f31 104 &ocfs2_xattr_security_handler,
cf1d6c76
TY		 105 NULL
106};
107
c988fd04 108static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
cf1d6c76 109 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
929fb014
TY		 110#ifdef CONFIG_OCFS2_FS_POSIX_ACL
111 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
112 = &ocfs2_xattr_acl_access_handler,
113 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
114 = &ocfs2_xattr_acl_default_handler,
115#endif
cf1d6c76 116 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
923f7f31 117 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
cf1d6c76
TY		 118};
119
120struct ocfs2_xattr_info {
121 int name_index;
122 const char *name;
123 const void *value;
124 size_t value_len;
125};
126
127struct ocfs2_xattr_search {
128 struct buffer_head *inode_bh;
129 /*
130 * xattr_bh point to the block buffer head which has extended attribute
131 * when extended attribute in inode, xattr_bh is equal to inode_bh.
132 */
133 struct buffer_head *xattr_bh;
134 struct ocfs2_xattr_header *header;
ba937127 135 struct ocfs2_xattr_bucket *bucket;
cf1d6c76
TY		 136 void *base;
137 void *end;
138 struct ocfs2_xattr_entry *here;
139 int not_found;
140};
141
589dc260
TM		 142static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
143 struct ocfs2_xattr_header *xh,
144 int index,
145 int *block_off,
146 int *new_offset);
147
54f443f4
JB		 148static int ocfs2_xattr_block_find(struct inode *inode,
149 int name_index,
150 const char *name,
151 struct ocfs2_xattr_search *xs);
589dc260
TM		 152static int ocfs2_xattr_index_block_find(struct inode *inode,
153 struct buffer_head *root_bh,
154 int name_index,
155 const char *name,
156 struct ocfs2_xattr_search *xs);
157
0c044f0b
TM		 158static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
159 struct ocfs2_xattr_tree_root *xt,
160 char *buffer,
161 size_t buffer_size);
162
01225596 163static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 164 struct ocfs2_xattr_search *xs,
165 struct ocfs2_xattr_set_ctxt *ctxt);
01225596
TM		 166
167static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
168 struct ocfs2_xattr_info *xi,
78f30c31
TM		 169 struct ocfs2_xattr_search *xs,
170 struct ocfs2_xattr_set_ctxt *ctxt);
01225596 171
a3944256
TM		 172static int ocfs2_delete_xattr_index_block(struct inode *inode,
173 struct buffer_head *xb_bh);
c58b6032
JB		 174static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
175 u64 src_blk, u64 last_blk, u64 to_blk,
176 unsigned int start_bucket,
177 u32 *first_hash);
a3944256 178
0030e001
TY		 179static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
180{
181 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
182}
183
184static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
185{
186 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
187}
188
189static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
190{
191 u16 len = sb->s_blocksize -
192 offsetof(struct ocfs2_xattr_header, xh_entries);
193
194 return len / sizeof(struct ocfs2_xattr_entry);
195}
196
9c7759aa 197#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
51def39f 198#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
3e632946 199#define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
9c7759aa 200
ba937127 201static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
6dde41d9 202{
ba937127
JB		 203 struct ocfs2_xattr_bucket *bucket;
204 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
6dde41d9 205
ba937127
JB		 206 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
207
208 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
209 if (bucket) {
210 bucket->bu_inode = inode;
211 bucket->bu_blocks = blks;
212 }
213
214 return bucket;
215}
216
217static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
218{
219 int i;
220
221 for (i = 0; i < bucket->bu_blocks; i++) {
6dde41d9
JB		 222 brelse(bucket->bu_bhs[i]);
223 bucket->bu_bhs[i] = NULL;
224 }
225}
226
ba937127
JB		 227static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
228{
229 if (bucket) {
230 ocfs2_xattr_bucket_relse(bucket);
231 bucket->bu_inode = NULL;
232 kfree(bucket);
233 }
234}
235
784b816a
JB		 236/*
237 * A bucket that has never been written to disk doesn't need to be
238 * read. We just need the buffer_heads. Don't call this for
239 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
240 * them fully.
241 */
ba937127 242static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
784b816a
JB		 243 u64 xb_blkno)
244{
245 int i, rc = 0;
784b816a 246
ba937127
JB		 247 for (i = 0; i < bucket->bu_blocks; i++) {
248 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
249 xb_blkno + i);
784b816a
JB		 250 if (!bucket->bu_bhs[i]) {
251 rc = -EIO;
252 mlog_errno(rc);
253 break;
254 }
255
757055ad
TM		 256 if (!ocfs2_buffer_uptodate(bucket->bu_inode,
257 bucket->bu_bhs[i]))
258 ocfs2_set_new_buffer_uptodate(bucket->bu_inode,
259 bucket->bu_bhs[i]);
784b816a
JB		 260 }
261
262 if (rc)
ba937127 263 ocfs2_xattr_bucket_relse(bucket);
784b816a
JB		 264 return rc;
265}
266
267/* Read the xattr bucket at xb_blkno */
ba937127 268static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
784b816a
JB		 269 u64 xb_blkno)
270{
ba937127 271 int rc;
784b816a 272
ba937127 273 rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno,
970e4936
JB		 274 bucket->bu_blocks, bucket->bu_bhs, 0,
275 NULL);
4d0e214e
JB		 276 if (!rc) {
277 rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb,
278 bucket->bu_bhs,
279 bucket->bu_blocks,
280 &bucket_xh(bucket)->xh_check);
281 if (rc)
282 mlog_errno(rc);
283 }
284
784b816a 285 if (rc)
ba937127 286 ocfs2_xattr_bucket_relse(bucket);
784b816a
JB		 287 return rc;
288}
289
1224be02 290static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
1224be02
JB		 291 struct ocfs2_xattr_bucket *bucket,
292 int type)
293{
294 int i, rc = 0;
1224be02 295
ba937127
JB		 296 for (i = 0; i < bucket->bu_blocks; i++) {
297 rc = ocfs2_journal_access(handle, bucket->bu_inode,
1224be02
JB		 298 bucket->bu_bhs[i], type);
299 if (rc) {
300 mlog_errno(rc);
301 break;
302 }
303 }
304
305 return rc;
306}
307
308static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
1224be02
JB		 309 struct ocfs2_xattr_bucket *bucket)
310{
ba937127 311 int i;
1224be02 312
4d0e214e
JB		 313 ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb,
314 bucket->bu_bhs, bucket->bu_blocks,
315 &bucket_xh(bucket)->xh_check);
316
ba937127 317 for (i = 0; i < bucket->bu_blocks; i++)
1224be02
JB		 318 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
319}
320
ba937127 321static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
4980c6da
JB		 322 struct ocfs2_xattr_bucket *src)
323{
324 int i;
ba937127
JB		 325 int blocksize = src->bu_inode->i_sb->s_blocksize;
326
327 BUG_ON(dest->bu_blocks != src->bu_blocks);
328 BUG_ON(dest->bu_inode != src->bu_inode);
4980c6da 329
ba937127 330 for (i = 0; i < src->bu_blocks; i++) {
4980c6da
JB		 331 memcpy(bucket_block(dest, i), bucket_block(src, i),
332 blocksize);
333 }
334}
1224be02 335
4ae1d69b
JB		 336static int ocfs2_validate_xattr_block(struct super_block *sb,
337 struct buffer_head *bh)
338{
d6b32bbb 339 int rc;
4ae1d69b
JB		 340 struct ocfs2_xattr_block *xb =
341 (struct ocfs2_xattr_block *)bh->b_data;
342
343 mlog(0, "Validating xattr block %llu\n",
344 (unsigned long long)bh->b_blocknr);
345
d6b32bbb
JB		 346 BUG_ON(!buffer_uptodate(bh));
347
348 /*
349 * If the ecc fails, we return the error but otherwise
350 * leave the filesystem running. We know any error is
351 * local to this block.
352 */
353 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check);
354 if (rc)
355 return rc;
356
357 /*
358 * Errors after here are fatal
359 */
360
4ae1d69b
JB		 361 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
362 ocfs2_error(sb,
363 "Extended attribute block #%llu has bad "
364 "signature %.*s",
365 (unsigned long long)bh->b_blocknr, 7,
366 xb->xb_signature);
367 return -EINVAL;
368 }
369
370 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
371 ocfs2_error(sb,
372 "Extended attribute block #%llu has an "
373 "invalid xb_blkno of %llu",
374 (unsigned long long)bh->b_blocknr,
375 (unsigned long long)le64_to_cpu(xb->xb_blkno));
376 return -EINVAL;
377 }
378
379 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
380 ocfs2_error(sb,
381 "Extended attribute block #%llu has an invalid "
382 "xb_fs_generation of #%u",
383 (unsigned long long)bh->b_blocknr,
384 le32_to_cpu(xb->xb_fs_generation));
385 return -EINVAL;
386 }
387
388 return 0;
389}
390
391static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
392 struct buffer_head **bh)
393{
394 int rc;
395 struct buffer_head *tmp = *bh;
396
970e4936
JB		 397 rc = ocfs2_read_block(inode, xb_blkno, &tmp,
398 ocfs2_validate_xattr_block);
4ae1d69b
JB		 399
400 /* If ocfs2_read_block() got us a new bh, pass it up. */
401 if (!rc && !*bh)
402 *bh = tmp;
403
404 return rc;
405}
406
936b8834 407static inline const char *ocfs2_xattr_prefix(int name_index)
cf1d6c76
TY		 408{
409 struct xattr_handler *handler = NULL;
410
411 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
412 handler = ocfs2_xattr_handler_map[name_index];
413
936b8834 414 return handler ? handler->prefix : NULL;
cf1d6c76
TY		 415}
416
40daa16a 417static u32 ocfs2_xattr_name_hash(struct inode *inode,
2057e5c6 418 const char *name,
40daa16a 419 int name_len)
cf1d6c76
TY		 420{
421 /* Get hash value of uuid from super block */
422 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
423 int i;
424
cf1d6c76
TY		 425 /* hash extended attribute name */
426 for (i = 0; i < name_len; i++) {
427 hash = (hash << OCFS2_HASH_SHIFT) ^
428 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
429 *name++;
430 }
431
432 return hash;
433}
434
435/*
436 * ocfs2_xattr_hash_entry()
437 *
438 * Compute the hash of an extended attribute.
439 */
440static void ocfs2_xattr_hash_entry(struct inode *inode,
441 struct ocfs2_xattr_header *header,
442 struct ocfs2_xattr_entry *entry)
443{
444 u32 hash = 0;
cf1d6c76 445 char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
cf1d6c76 446
2057e5c6 447 hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len);
cf1d6c76
TY		 448 entry->xe_name_hash = cpu_to_le32(hash);
449
450 return;
451}
f56654c4 452
534eaddd
TY		 453static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
454{
455 int size = 0;
456
457 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
458 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
459 else
460 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
461 size += sizeof(struct ocfs2_xattr_entry);
462
463 return size;
464}
465
466int ocfs2_calc_security_init(struct inode *dir,
467 struct ocfs2_security_xattr_info *si,
468 int *want_clusters,
469 int *xattr_credits,
470 struct ocfs2_alloc_context **xattr_ac)
471{
472 int ret = 0;
473 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
474 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
475 si->value_len);
476
477 /*
478 * The max space of security xattr taken inline is
479 * 256(name) + 80(value) + 16(entry) = 352 bytes,
480 * So reserve one metadata block for it is ok.
481 */
482 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
483 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
484 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
485 if (ret) {
486 mlog_errno(ret);
487 return ret;
488 }
489 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
490 }
491
492 /* reserve clusters for xattr value which will be set in B tree*/
493 if (si->value_len > OCFS2_XATTR_INLINE_SIZE)
494 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
495 si->value_len);
496 return ret;
497}
498
89c38bd0
TY		 499int ocfs2_calc_xattr_init(struct inode *dir,
500 struct buffer_head *dir_bh,
501 int mode,
502 struct ocfs2_security_xattr_info *si,
503 int *want_clusters,
504 int *xattr_credits,
505 struct ocfs2_alloc_context **xattr_ac)
506{
507 int ret = 0;
508 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
509 int s_size = 0;
510 int a_size = 0;
511 int acl_len = 0;
512
513 if (si->enable)
514 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
515 si->value_len);
516
517 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
518 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
519 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
520 "", NULL, 0);
521 if (acl_len > 0) {
522 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
523 if (S_ISDIR(mode))
524 a_size <<= 1;
525 } else if (acl_len != 0 && acl_len != -ENODATA) {
526 mlog_errno(ret);
527 return ret;
528 }
529 }
530
531 if (!(s_size + a_size))
532 return ret;
533
534 /*
535 * The max space of security xattr taken inline is
536 * 256(name) + 80(value) + 16(entry) = 352 bytes,
537 * The max space of acl xattr taken inline is
538 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
539 * when blocksize = 512, may reserve one more cluser for
540 * xattr bucket, otherwise reserve one metadata block
541 * for them is ok.
542 */
543 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
544 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
545 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
546 if (ret) {
547 mlog_errno(ret);
548 return ret;
549 }
550 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
551 }
552
553 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
554 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
555 *want_clusters += 1;
556 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
557 }
558
559 /* reserve clusters for xattr value which will be set in B tree*/
560 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE)
561 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
562 si->value_len);
563 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
564 acl_len > OCFS2_XATTR_INLINE_SIZE) {
565 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
566 if (S_ISDIR(mode))
567 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
568 acl_len);
569 }
570
571 return ret;
572}
573
f56654c4
TM		 574static int ocfs2_xattr_extend_allocation(struct inode *inode,
575 u32 clusters_to_add,
19b801f4 576 struct ocfs2_xattr_value_buf *vb,
78f30c31 577 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 578{
579 int status = 0;
85db90e7 580 handle_t *handle = ctxt->handle;
f56654c4
TM		 581 enum ocfs2_alloc_restarted why;
582 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
19b801f4 583 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
f99b9b7c 584 struct ocfs2_extent_tree et;
f56654c4
TM		 585
586 mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
587
19b801f4 588 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
f99b9b7c 589
19b801f4 590 status = vb->vb_access(handle, inode, vb->vb_bh,
2a50a743 591 OCFS2_JOURNAL_ACCESS_WRITE);
f56654c4
TM		 592 if (status < 0) {
593 mlog_errno(status);
594 goto leave;
595 }
596
19b801f4 597 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
f56654c4
TM		 598 status = ocfs2_add_clusters_in_btree(osb,
599 inode,
600 &logical_start,
601 clusters_to_add,
602 0,
f99b9b7c 603 &et,
f56654c4 604 handle,
78f30c31
TM		 605 ctxt->data_ac,
606 ctxt->meta_ac,
f99b9b7c 607 &why);
85db90e7
TM		 608 if (status < 0) {
609 mlog_errno(status);
f56654c4
TM		 610 goto leave;
611 }
612
19b801f4 613 status = ocfs2_journal_dirty(handle, vb->vb_bh);
f56654c4
TM		 614 if (status < 0) {
615 mlog_errno(status);
616 goto leave;
617 }
618
19b801f4 619 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters;
f56654c4 620
85db90e7
TM		 621 /*
622 * We should have already allocated enough space before the transaction,
623 * so no need to restart.
624 */
625 BUG_ON(why != RESTART_NONE || clusters_to_add);
f56654c4
TM		 626
627leave:
f56654c4
TM		 628
629 return status;
630}
631
632static int __ocfs2_remove_xattr_range(struct inode *inode,
d72cc72d 633 struct ocfs2_xattr_value_buf *vb,
f56654c4 634 u32 cpos, u32 phys_cpos, u32 len,
78f30c31 635 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 636{
637 int ret;
638 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
85db90e7 639 handle_t *handle = ctxt->handle;
f99b9b7c
JB		 640 struct ocfs2_extent_tree et;
641
d72cc72d 642 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
f56654c4 643
d72cc72d
JB		 644 ret = vb->vb_access(handle, inode, vb->vb_bh,
645 OCFS2_JOURNAL_ACCESS_WRITE);
f56654c4
TM		 646 if (ret) {
647 mlog_errno(ret);
85db90e7 648 goto out;
f56654c4
TM		 649 }
650
78f30c31
TM		 651 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac,
652 &ctxt->dealloc);
f56654c4
TM		 653 if (ret) {
654 mlog_errno(ret);
85db90e7 655 goto out;
f56654c4
TM		 656 }
657
d72cc72d 658 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
f56654c4 659
d72cc72d 660 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
f56654c4
TM		 661 if (ret) {
662 mlog_errno(ret);
85db90e7 663 goto out;
f56654c4
TM		 664 }
665
78f30c31 666 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len);
f56654c4
TM		 667 if (ret)
668 mlog_errno(ret);
669
f56654c4 670out:
f56654c4
TM		 671 return ret;
672}
673
674static int ocfs2_xattr_shrink_size(struct inode *inode,
675 u32 old_clusters,
676 u32 new_clusters,
19b801f4 677 struct ocfs2_xattr_value_buf *vb,
78f30c31 678 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 679{
680 int ret = 0;
681 u32 trunc_len, cpos, phys_cpos, alloc_size;
682 u64 block;
f56654c4
TM		 683
684 if (old_clusters <= new_clusters)
685 return 0;
686
687 cpos = new_clusters;
688 trunc_len = old_clusters - new_clusters;
689 while (trunc_len) {
690 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
d72cc72d 691 &alloc_size,
19b801f4 692 &vb->vb_xv->xr_list);
f56654c4
TM		 693 if (ret) {
694 mlog_errno(ret);
695 goto out;
696 }
697
698 if (alloc_size > trunc_len)
699 alloc_size = trunc_len;
700
19b801f4 701 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
f56654c4 702 phys_cpos, alloc_size,
78f30c31 703 ctxt);
f56654c4
TM		 704 if (ret) {
705 mlog_errno(ret);
706 goto out;
707 }
708
709 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
710 ocfs2_remove_xattr_clusters_from_cache(inode, block,
711 alloc_size);
712 cpos += alloc_size;
713 trunc_len -= alloc_size;
714 }
715
716out:
f56654c4
TM		 717 return ret;
718}
719
720static int ocfs2_xattr_value_truncate(struct inode *inode,
721 struct buffer_head *root_bh,
722 struct ocfs2_xattr_value_root *xv,
78f30c31
TM		 723 int len,
724 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 725{
726 int ret;
727 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
728 u32 old_clusters = le32_to_cpu(xv->xr_clusters);
19b801f4
JB		 729 struct ocfs2_xattr_value_buf vb = {
730 .vb_bh = root_bh,
731 .vb_xv = xv,
732 .vb_access = ocfs2_journal_access,
733 };
f56654c4
TM		 734
735 if (new_clusters == old_clusters)
736 return 0;
737
738 if (new_clusters > old_clusters)
739 ret = ocfs2_xattr_extend_allocation(inode,
740 new_clusters - old_clusters,
19b801f4 741 &vb, ctxt);
f56654c4
TM		 742 else
743 ret = ocfs2_xattr_shrink_size(inode,
744 old_clusters, new_clusters,
19b801f4 745 &vb, ctxt);
f56654c4
TM		 746
747 return ret;
748}
cf1d6c76 749
936b8834
TM		 750static int ocfs2_xattr_list_entry(char *buffer, size_t size,
751 size_t *result, const char *prefix,
752 const char *name, int name_len)
753{
754 char *p = buffer + *result;
755 int prefix_len = strlen(prefix);
756 int total_len = prefix_len + name_len + 1;
757
758 *result += total_len;
759
760 /* we are just looking for how big our buffer needs to be */
761 if (!size)
762 return 0;
763
764 if (*result > size)
765 return -ERANGE;
766
767 memcpy(p, prefix, prefix_len);
768 memcpy(p + prefix_len, name, name_len);
769 p[prefix_len + name_len] = '\0';
770
771 return 0;
772}
773
cf1d6c76
TY		 774static int ocfs2_xattr_list_entries(struct inode *inode,
775 struct ocfs2_xattr_header *header,
776 char *buffer, size_t buffer_size)
777{
936b8834
TM		 778 size_t result = 0;
779 int i, type, ret;
780 const char *prefix, *name;
cf1d6c76
TY		 781
782 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
783 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
936b8834
TM		 784 type = ocfs2_xattr_get_type(entry);
785 prefix = ocfs2_xattr_prefix(type);
786
787 if (prefix) {
788 name = (const char *)header +
789 le16_to_cpu(entry->xe_name_offset);
790
791 ret = ocfs2_xattr_list_entry(buffer, buffer_size,
792 &result, prefix, name,
793 entry->xe_name_len);
794 if (ret)
795 return ret;
cf1d6c76
TY		 796 }
797 }
798
936b8834 799 return result;
cf1d6c76
TY		 800}
801
802static int ocfs2_xattr_ibody_list(struct inode *inode,
803 struct ocfs2_dinode *di,
804 char *buffer,
805 size_t buffer_size)
806{
807 struct ocfs2_xattr_header *header = NULL;
808 struct ocfs2_inode_info *oi = OCFS2_I(inode);
809 int ret = 0;
810
811 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
812 return ret;
813
814 header = (struct ocfs2_xattr_header *)
815 ((void *)di + inode->i_sb->s_blocksize -
816 le16_to_cpu(di->i_xattr_inline_size));
817
818 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
819
820 return ret;
821}
822
823static int ocfs2_xattr_block_list(struct inode *inode,
824 struct ocfs2_dinode *di,
825 char *buffer,
826 size_t buffer_size)
827{
828 struct buffer_head *blk_bh = NULL;
0c044f0b 829 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 830 int ret = 0;
831
832 if (!di->i_xattr_loc)
833 return ret;
834
4ae1d69b
JB		 835 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
836 &blk_bh);
cf1d6c76
TY		 837 if (ret < 0) {
838 mlog_errno(ret);
839 return ret;
840 }
cf1d6c76 841
0c044f0b 842 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
0c044f0b
TM		 843 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
844 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
845 ret = ocfs2_xattr_list_entries(inode, header,
846 buffer, buffer_size);
847 } else {
848 struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
849 ret = ocfs2_xattr_tree_list_index_block(inode, xt,
850 buffer, buffer_size);
851 }
4ae1d69b 852
cf1d6c76
TY		 853 brelse(blk_bh);
854
855 return ret;
856}
857
858ssize_t ocfs2_listxattr(struct dentry *dentry,
859 char *buffer,
860 size_t size)
861{
862 int ret = 0, i_ret = 0, b_ret = 0;
863 struct buffer_head *di_bh = NULL;
864 struct ocfs2_dinode *di = NULL;
865 struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
866
8154da3d
TY		 867 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
868 return -EOPNOTSUPP;
869
cf1d6c76
TY		 870 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
871 return ret;
872
873 ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
874 if (ret < 0) {
875 mlog_errno(ret);
876 return ret;
877 }
878
879 di = (struct ocfs2_dinode *)di_bh->b_data;
880
881 down_read(&oi->ip_xattr_sem);
882 i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
883 if (i_ret < 0)
884 b_ret = 0;
885 else {
886 if (buffer) {
887 buffer += i_ret;
888 size -= i_ret;
889 }
890 b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
891 buffer, size);
892 if (b_ret < 0)
893 i_ret = 0;
894 }
895 up_read(&oi->ip_xattr_sem);
896 ocfs2_inode_unlock(dentry->d_inode, 0);
897
898 brelse(di_bh);
899
900 return i_ret + b_ret;
901}
902
903static int ocfs2_xattr_find_entry(int name_index,
904 const char *name,
905 struct ocfs2_xattr_search *xs)
906{
907 struct ocfs2_xattr_entry *entry;
908 size_t name_len;
909 int i, cmp = 1;
910
911 if (name == NULL)
912 return -EINVAL;
913
914 name_len = strlen(name);
915 entry = xs->here;
916 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
917 cmp = name_index - ocfs2_xattr_get_type(entry);
918 if (!cmp)
919 cmp = name_len - entry->xe_name_len;
920 if (!cmp)
921 cmp = memcmp(name, (xs->base +
922 le16_to_cpu(entry->xe_name_offset)),
923 name_len);
924 if (cmp == 0)
925 break;
926 entry += 1;
927 }
928 xs->here = entry;
929
930 return cmp ? -ENODATA : 0;
931}
932
933static int ocfs2_xattr_get_value_outside(struct inode *inode,
589dc260 934 struct ocfs2_xattr_value_root *xv,
cf1d6c76
TY		 935 void *buffer,
936 size_t len)
937{
938 u32 cpos, p_cluster, num_clusters, bpc, clusters;
939 u64 blkno;
940 int i, ret = 0;
941 size_t cplen, blocksize;
942 struct buffer_head *bh = NULL;
cf1d6c76
TY		 943 struct ocfs2_extent_list *el;
944
cf1d6c76
TY		 945 el = &xv->xr_list;
946 clusters = le32_to_cpu(xv->xr_clusters);
947 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
948 blocksize = inode->i_sb->s_blocksize;
949
950 cpos = 0;
951 while (cpos < clusters) {
952 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
953 &num_clusters, el);
954 if (ret) {
955 mlog_errno(ret);
956 goto out;
957 }
958
959 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
960 /* Copy ocfs2_xattr_value */
961 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
970e4936 962 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
cf1d6c76
TY		 963 if (ret) {
964 mlog_errno(ret);
965 goto out;
966 }
967
968 cplen = len >= blocksize ? blocksize : len;
969 memcpy(buffer, bh->b_data, cplen);
970 len -= cplen;
971 buffer += cplen;
972
973 brelse(bh);
974 bh = NULL;
975 if (len == 0)
976 break;
977 }
978 cpos += num_clusters;
979 }
980out:
981 return ret;
982}
983
984static int ocfs2_xattr_ibody_get(struct inode *inode,
985 int name_index,
986 const char *name,
987 void *buffer,
988 size_t buffer_size,
989 struct ocfs2_xattr_search *xs)
990{
991 struct ocfs2_inode_info *oi = OCFS2_I(inode);
992 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
589dc260 993 struct ocfs2_xattr_value_root *xv;
cf1d6c76
TY		 994 size_t size;
995 int ret = 0;
996
997 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
998 return -ENODATA;
999
1000 xs->end = (void *)di + inode->i_sb->s_blocksize;
1001 xs->header = (struct ocfs2_xattr_header *)
1002 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1003 xs->base = (void *)xs->header;
1004 xs->here = xs->header->xh_entries;
1005
1006 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1007 if (ret)
1008 return ret;
1009 size = le64_to_cpu(xs->here->xe_value_size);
1010 if (buffer) {
1011 if (size > buffer_size)
1012 return -ERANGE;
1013 if (ocfs2_xattr_is_local(xs->here)) {
1014 memcpy(buffer, (void *)xs->base +
1015 le16_to_cpu(xs->here->xe_name_offset) +
1016 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1017 } else {
589dc260
TM		 1018 xv = (struct ocfs2_xattr_value_root *)
1019 (xs->base + le16_to_cpu(
1020 xs->here->xe_name_offset) +
1021 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1022 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1023 buffer, size);
1024 if (ret < 0) {
1025 mlog_errno(ret);
1026 return ret;
1027 }
1028 }
1029 }
1030
1031 return size;
1032}
1033
1034static int ocfs2_xattr_block_get(struct inode *inode,
1035 int name_index,
1036 const char *name,
1037 void *buffer,
1038 size_t buffer_size,
1039 struct ocfs2_xattr_search *xs)
1040{
cf1d6c76 1041 struct ocfs2_xattr_block *xb;
589dc260 1042 struct ocfs2_xattr_value_root *xv;
cf1d6c76 1043 size_t size;
589dc260 1044 int ret = -ENODATA, name_offset, name_len, block_off, i;
cf1d6c76 1045
ba937127
JB		 1046 xs->bucket = ocfs2_xattr_bucket_new(inode);
1047 if (!xs->bucket) {
1048 ret = -ENOMEM;
1049 mlog_errno(ret);
1050 goto cleanup;
1051 }
589dc260 1052
54f443f4
JB		 1053 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1054 if (ret) {
cf1d6c76 1055 mlog_errno(ret);
cf1d6c76
TY		 1056 goto cleanup;
1057 }
1058
6c1e183e
TY		 1059 if (xs->not_found) {
1060 ret = -ENODATA;
1061 goto cleanup;
1062 }
1063
54f443f4 1064 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 1065 size = le64_to_cpu(xs->here->xe_value_size);
1066 if (buffer) {
1067 ret = -ERANGE;
1068 if (size > buffer_size)
1069 goto cleanup;
589dc260
TM		 1070
1071 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1072 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1073 i = xs->here - xs->header->xh_entries;
1074
1075 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
1076 ret = ocfs2_xattr_bucket_get_name_value(inode,
ba937127 1077 bucket_xh(xs->bucket),
589dc260
TM		 1078 i,
1079 &block_off,
1080 &name_offset);
ba937127 1081 xs->base = bucket_block(xs->bucket, block_off);
589dc260 1082 }
cf1d6c76
TY		 1083 if (ocfs2_xattr_is_local(xs->here)) {
1084 memcpy(buffer, (void *)xs->base +
589dc260 1085 name_offset + name_len, size);
cf1d6c76 1086 } else {
589dc260
TM		 1087 xv = (struct ocfs2_xattr_value_root *)
1088 (xs->base + name_offset + name_len);
1089 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1090 buffer, size);
1091 if (ret < 0) {
1092 mlog_errno(ret);
1093 goto cleanup;
1094 }
1095 }
1096 }
1097 ret = size;
1098cleanup:
ba937127 1099 ocfs2_xattr_bucket_free(xs->bucket);
cf1d6c76 1100
54f443f4
JB		 1101 brelse(xs->xattr_bh);
1102 xs->xattr_bh = NULL;
cf1d6c76
TY		 1103 return ret;
1104}
1105
4e3e9d02
TY		 1106int ocfs2_xattr_get_nolock(struct inode *inode,
1107 struct buffer_head *di_bh,
0030e001
TY		 1108 int name_index,
1109 const char *name,
1110 void *buffer,
1111 size_t buffer_size)
cf1d6c76
TY		 1112{
1113 int ret;
1114 struct ocfs2_dinode *di = NULL;
cf1d6c76
TY		 1115 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1116 struct ocfs2_xattr_search xis = {
1117 .not_found = -ENODATA,
1118 };
1119 struct ocfs2_xattr_search xbs = {
1120 .not_found = -ENODATA,
1121 };
1122
8154da3d
TY		 1123 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1124 return -EOPNOTSUPP;
1125
cf1d6c76
TY		 1126 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1127 ret = -ENODATA;
1128
cf1d6c76
TY		 1129 xis.inode_bh = xbs.inode_bh = di_bh;
1130 di = (struct ocfs2_dinode *)di_bh->b_data;
1131
1132 down_read(&oi->ip_xattr_sem);
1133 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1134 buffer_size, &xis);
6c1e183e 1135 if (ret == -ENODATA && di->i_xattr_loc)
cf1d6c76
TY		 1136 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1137 buffer_size, &xbs);
1138 up_read(&oi->ip_xattr_sem);
4e3e9d02
TY		 1139
1140 return ret;
1141}
1142
1143/* ocfs2_xattr_get()
1144 *
1145 * Copy an extended attribute into the buffer provided.
1146 * Buffer is NULL to compute the size of buffer required.
1147 */
1148static int ocfs2_xattr_get(struct inode *inode,
1149 int name_index,
1150 const char *name,
1151 void *buffer,
1152 size_t buffer_size)
1153{
1154 int ret;
1155 struct buffer_head *di_bh = NULL;
1156
1157 ret = ocfs2_inode_lock(inode, &di_bh, 0);
1158 if (ret < 0) {
1159 mlog_errno(ret);
1160 return ret;
1161 }
1162 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1163 name, buffer, buffer_size);
1164
cf1d6c76
TY		 1165 ocfs2_inode_unlock(inode, 0);
1166
1167 brelse(di_bh);
1168
1169 return ret;
1170}
1171
1172static int __ocfs2_xattr_set_value_outside(struct inode *inode,
85db90e7 1173 handle_t *handle,
cf1d6c76
TY		 1174 struct ocfs2_xattr_value_root *xv,
1175 const void *value,
1176 int value_len)
1177{
1178 int ret = 0, i, cp_len, credits;
1179 u16 blocksize = inode->i_sb->s_blocksize;
1180 u32 p_cluster, num_clusters;
1181 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1182 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1183 u64 blkno;
1184 struct buffer_head *bh = NULL;
cf1d6c76
TY		 1185
1186 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1187
85db90e7
TM		 1188 /*
1189 * In __ocfs2_xattr_set_value_outside has already been dirtied,
1190 * so we don't need to worry about whether ocfs2_extend_trans
1191 * will create a new transactio for us or not.
1192 */
cf1d6c76 1193 credits = clusters * bpc;
85db90e7
TM		 1194 ret = ocfs2_extend_trans(handle, credits);
1195 if (ret) {
cf1d6c76
TY		 1196 mlog_errno(ret);
1197 goto out;
1198 }
1199
1200 while (cpos < clusters) {
1201 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1202 &num_clusters, &xv->xr_list);
1203 if (ret) {
1204 mlog_errno(ret);
85db90e7 1205 goto out;
cf1d6c76
TY		 1206 }
1207
1208 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1209
1210 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
970e4936 1211 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
cf1d6c76
TY		 1212 if (ret) {
1213 mlog_errno(ret);
85db90e7 1214 goto out;
cf1d6c76
TY		 1215 }
1216
1217 ret = ocfs2_journal_access(handle,
1218 inode,
1219 bh,
1220 OCFS2_JOURNAL_ACCESS_WRITE);
1221 if (ret < 0) {
1222 mlog_errno(ret);
85db90e7 1223 goto out;
cf1d6c76
TY		 1224 }
1225
1226 cp_len = value_len > blocksize ? blocksize : value_len;
1227 memcpy(bh->b_data, value, cp_len);
1228 value_len -= cp_len;
1229 value += cp_len;
1230 if (cp_len < blocksize)
1231 memset(bh->b_data + cp_len, 0,
1232 blocksize - cp_len);
1233
1234 ret = ocfs2_journal_dirty(handle, bh);
1235 if (ret < 0) {
1236 mlog_errno(ret);
85db90e7 1237 goto out;
cf1d6c76
TY		 1238 }
1239 brelse(bh);
1240 bh = NULL;
1241
1242 /*
1243 * XXX: do we need to empty all the following
1244 * blocks in this cluster?
1245 */
1246 if (!value_len)
1247 break;
1248 }
1249 cpos += num_clusters;
1250 }
cf1d6c76
TY		 1251out:
1252 brelse(bh);
1253
1254 return ret;
1255}
1256
1257static int ocfs2_xattr_cleanup(struct inode *inode,
85db90e7 1258 handle_t *handle,
cf1d6c76
TY		 1259 struct ocfs2_xattr_info *xi,
1260 struct ocfs2_xattr_search *xs,
1261 size_t offs)
1262{
cf1d6c76
TY		 1263 int ret = 0;
1264 size_t name_len = strlen(xi->name);
1265 void *val = xs->base + offs;
1266 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1267
cf1d6c76
TY		 1268 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1269 OCFS2_JOURNAL_ACCESS_WRITE);
1270 if (ret) {
1271 mlog_errno(ret);
85db90e7 1272 goto out;
cf1d6c76
TY		 1273 }
1274 /* Decrease xattr count */
1275 le16_add_cpu(&xs->header->xh_count, -1);
1276 /* Remove the xattr entry and tree root which has already be set*/
1277 memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
1278 memset(val, 0, size);
1279
1280 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1281 if (ret < 0)
1282 mlog_errno(ret);
cf1d6c76
TY		 1283out:
1284 return ret;
1285}
1286
1287static int ocfs2_xattr_update_entry(struct inode *inode,
85db90e7 1288 handle_t *handle,
cf1d6c76
TY		 1289 struct ocfs2_xattr_info *xi,
1290 struct ocfs2_xattr_search *xs,
1291 size_t offs)
1292{
85db90e7 1293 int ret;
cf1d6c76 1294
cf1d6c76
TY		 1295 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1296 OCFS2_JOURNAL_ACCESS_WRITE);
1297 if (ret) {
1298 mlog_errno(ret);
85db90e7 1299 goto out;
cf1d6c76
TY		 1300 }
1301
1302 xs->here->xe_name_offset = cpu_to_le16(offs);
1303 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1304 if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
1305 ocfs2_xattr_set_local(xs->here, 1);
1306 else
1307 ocfs2_xattr_set_local(xs->here, 0);
1308 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1309
1310 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1311 if (ret < 0)
1312 mlog_errno(ret);
cf1d6c76
TY		 1313out:
1314 return ret;
1315}
1316
1317/*
1318 * ocfs2_xattr_set_value_outside()
1319 *
1320 * Set large size value in B tree.
1321 */
1322static int ocfs2_xattr_set_value_outside(struct inode *inode,
1323 struct ocfs2_xattr_info *xi,
1324 struct ocfs2_xattr_search *xs,
78f30c31 1325 struct ocfs2_xattr_set_ctxt *ctxt,
cf1d6c76
TY		 1326 size_t offs)
1327{
1328 size_t name_len = strlen(xi->name);
1329 void *val = xs->base + offs;
1330 struct ocfs2_xattr_value_root *xv = NULL;
1331 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1332 int ret = 0;
1333
1334 memset(val, 0, size);
1335 memcpy(val, xi->name, name_len);
1336 xv = (struct ocfs2_xattr_value_root *)
1337 (val + OCFS2_XATTR_SIZE(name_len));
1338 xv->xr_clusters = 0;
1339 xv->xr_last_eb_blk = 0;
1340 xv->xr_list.l_tree_depth = 0;
1341 xv->xr_list.l_count = cpu_to_le16(1);
1342 xv->xr_list.l_next_free_rec = 0;
1343
1344 ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv,
78f30c31 1345 xi->value_len, ctxt);
cf1d6c76
TY		 1346 if (ret < 0) {
1347 mlog_errno(ret);
1348 return ret;
1349 }
85db90e7 1350 ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, offs);
cf1d6c76
TY		 1351 if (ret < 0) {
1352 mlog_errno(ret);
1353 return ret;
1354 }
85db90e7
TM		 1355 ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, xv,
1356 xi->value, xi->value_len);
cf1d6c76
TY		 1357 if (ret < 0)
1358 mlog_errno(ret);
1359
1360 return ret;
1361}
1362
1363/*
1364 * ocfs2_xattr_set_entry_local()
1365 *
1366 * Set, replace or remove extended attribute in local.
1367 */
1368static void ocfs2_xattr_set_entry_local(struct inode *inode,
1369 struct ocfs2_xattr_info *xi,
1370 struct ocfs2_xattr_search *xs,
1371 struct ocfs2_xattr_entry *last,
1372 size_t min_offs)
1373{
1374 size_t name_len = strlen(xi->name);
1375 int i;
1376
1377 if (xi->value && xs->not_found) {
1378 /* Insert the new xattr entry. */
1379 le16_add_cpu(&xs->header->xh_count, 1);
1380 ocfs2_xattr_set_type(last, xi->name_index);
1381 ocfs2_xattr_set_local(last, 1);
1382 last->xe_name_len = name_len;
1383 } else {
1384 void *first_val;
1385 void *val;
1386 size_t offs, size;
1387
1388 first_val = xs->base + min_offs;
1389 offs = le16_to_cpu(xs->here->xe_name_offset);
1390 val = xs->base + offs;
1391
1392 if (le64_to_cpu(xs->here->xe_value_size) >
1393 OCFS2_XATTR_INLINE_SIZE)
1394 size = OCFS2_XATTR_SIZE(name_len) +
1395 OCFS2_XATTR_ROOT_SIZE;
1396 else
1397 size = OCFS2_XATTR_SIZE(name_len) +
1398 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1399
1400 if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
1401 OCFS2_XATTR_SIZE(xi->value_len)) {
1402 /* The old and the new value have the
1403 same size. Just replace the value. */
1404 ocfs2_xattr_set_local(xs->here, 1);
1405 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1406 /* Clear value bytes. */
1407 memset(val + OCFS2_XATTR_SIZE(name_len),
1408 0,
1409 OCFS2_XATTR_SIZE(xi->value_len));
1410 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1411 xi->value,
1412 xi->value_len);
1413 return;
1414 }
1415 /* Remove the old name+value. */
1416 memmove(first_val + size, first_val, val - first_val);
1417 memset(first_val, 0, size);
1418 xs->here->xe_name_hash = 0;
1419 xs->here->xe_name_offset = 0;
1420 ocfs2_xattr_set_local(xs->here, 1);
1421 xs->here->xe_value_size = 0;
1422
1423 min_offs += size;
1424
1425 /* Adjust all value offsets. */
1426 last = xs->header->xh_entries;
1427 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1428 size_t o = le16_to_cpu(last->xe_name_offset);
1429
1430 if (o < offs)
1431 last->xe_name_offset = cpu_to_le16(o + size);
1432 last += 1;
1433 }
1434
1435 if (!xi->value) {
1436 /* Remove the old entry. */
1437 last -= 1;
1438 memmove(xs->here, xs->here + 1,
1439 (void *)last - (void *)xs->here);
1440 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
1441 le16_add_cpu(&xs->header->xh_count, -1);
1442 }
1443 }
1444 if (xi->value) {
1445 /* Insert the new name+value. */
1446 size_t size = OCFS2_XATTR_SIZE(name_len) +
1447 OCFS2_XATTR_SIZE(xi->value_len);
1448 void *val = xs->base + min_offs - size;
1449
1450 xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
1451 memset(val, 0, size);
1452 memcpy(val, xi->name, name_len);
1453 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1454 xi->value,
1455 xi->value_len);
1456 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1457 ocfs2_xattr_set_local(xs->here, 1);
1458 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1459 }
1460
1461 return;
1462}
1463
1464/*
1465 * ocfs2_xattr_set_entry()
1466 *
1467 * Set extended attribute entry into inode or block.
1468 *
1469 * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
1470 * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
1471 * then set value in B tree with set_value_outside().
1472 */
1473static int ocfs2_xattr_set_entry(struct inode *inode,
1474 struct ocfs2_xattr_info *xi,
1475 struct ocfs2_xattr_search *xs,
78f30c31 1476 struct ocfs2_xattr_set_ctxt *ctxt,
cf1d6c76
TY		 1477 int flag)
1478{
1479 struct ocfs2_xattr_entry *last;
1480 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1481 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1482 size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
1483 size_t size_l = 0;
85db90e7 1484 handle_t *handle = ctxt->handle;
cf1d6c76
TY		 1485 int free, i, ret;
1486 struct ocfs2_xattr_info xi_l = {
1487 .name_index = xi->name_index,
1488 .name = xi->name,
1489 .value = xi->value,
1490 .value_len = xi->value_len,
1491 };
1492
1493 /* Compute min_offs, last and free space. */
1494 last = xs->header->xh_entries;
1495
1496 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1497 size_t offs = le16_to_cpu(last->xe_name_offset);
1498 if (offs < min_offs)
1499 min_offs = offs;
1500 last += 1;
1501 }
1502
1503 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
1504 if (free < 0)
b37c4d84 1505 return -EIO;
cf1d6c76
TY		 1506
1507 if (!xs->not_found) {
1508 size_t size = 0;
1509 if (ocfs2_xattr_is_local(xs->here))
1510 size = OCFS2_XATTR_SIZE(name_len) +
1511 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1512 else
1513 size = OCFS2_XATTR_SIZE(name_len) +
1514 OCFS2_XATTR_ROOT_SIZE;
1515 free += (size + sizeof(struct ocfs2_xattr_entry));
1516 }
1517 /* Check free space in inode or block */
1518 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1519 if (free < sizeof(struct ocfs2_xattr_entry) +
1520 OCFS2_XATTR_SIZE(name_len) +
1521 OCFS2_XATTR_ROOT_SIZE) {
1522 ret = -ENOSPC;
1523 goto out;
1524 }
1525 size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1526 xi_l.value = (void *)&def_xv;
1527 xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
1528 } else if (xi->value) {
1529 if (free < sizeof(struct ocfs2_xattr_entry) +
1530 OCFS2_XATTR_SIZE(name_len) +
1531 OCFS2_XATTR_SIZE(xi->value_len)) {
1532 ret = -ENOSPC;
1533 goto out;
1534 }
1535 }
1536
1537 if (!xs->not_found) {
1538 /* For existing extended attribute */
1539 size_t size = OCFS2_XATTR_SIZE(name_len) +
1540 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1541 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1542 void *val = xs->base + offs;
1543
1544 if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
1545 /* Replace existing local xattr with tree root */
1546 ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
78f30c31 1547 ctxt, offs);
cf1d6c76
TY		 1548 if (ret < 0)
1549 mlog_errno(ret);
1550 goto out;
1551 } else if (!ocfs2_xattr_is_local(xs->here)) {
1552 /* For existing xattr which has value outside */
1553 struct ocfs2_xattr_value_root *xv = NULL;
1554 xv = (struct ocfs2_xattr_value_root *)(val +
1555 OCFS2_XATTR_SIZE(name_len));
1556
1557 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1558 /*
1559 * If new value need set outside also,
1560 * first truncate old value to new value,
1561 * then set new value with set_value_outside().
1562 */
1563 ret = ocfs2_xattr_value_truncate(inode,
1564 xs->xattr_bh,
1565 xv,
78f30c31
TM		 1566 xi->value_len,
1567 ctxt);
cf1d6c76
TY		 1568 if (ret < 0) {
1569 mlog_errno(ret);
1570 goto out;
1571 }
1572
85db90e7
TM		 1573 ret = ocfs2_xattr_update_entry(inode,
1574 handle,
1575 xi,
1576 xs,
1577 offs);
cf1d6c76
TY		 1578 if (ret < 0) {
1579 mlog_errno(ret);
1580 goto out;
1581 }
1582
85db90e7
TM		 1583 ret = __ocfs2_xattr_set_value_outside(inode,
1584 handle,
1585 xv,
1586 xi->value,
1587 xi->value_len);
cf1d6c76
TY		 1588 if (ret < 0)
1589 mlog_errno(ret);
1590 goto out;
1591 } else {
1592 /*
1593 * If new value need set in local,
1594 * just trucate old value to zero.
1595 */
1596 ret = ocfs2_xattr_value_truncate(inode,
85db90e7
TM		 1597 xs->xattr_bh,
1598 xv,
1599 0,
1600 ctxt);
cf1d6c76
TY		 1601 if (ret < 0)
1602 mlog_errno(ret);
1603 }
1604 }
1605 }
1606
cf1d6c76
TY		 1607 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
1608 OCFS2_JOURNAL_ACCESS_WRITE);
1609 if (ret) {
1610 mlog_errno(ret);
85db90e7 1611 goto out;
cf1d6c76
TY		 1612 }
1613
1614 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
cf1d6c76
TY		 1615 ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
1616 OCFS2_JOURNAL_ACCESS_WRITE);
1617 if (ret) {
1618 mlog_errno(ret);
85db90e7 1619 goto out;
cf1d6c76
TY		 1620 }
1621 }
1622
1623 /*
1624 * Set value in local, include set tree root in local.
1625 * This is the first step for value size >INLINE_SIZE.
1626 */
1627 ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
1628
1629 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1630 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1631 if (ret < 0) {
1632 mlog_errno(ret);
85db90e7 1633 goto out;
cf1d6c76
TY		 1634 }
1635 }
1636
1637 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
1638 (flag & OCFS2_INLINE_XATTR_FL)) {
1639 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1640 unsigned int xattrsize = osb->s_xattr_inline_size;
1641
1642 /*
1643 * Adjust extent record count or inline data size
1644 * to reserve space for extended attribute.
1645 */
1646 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1647 struct ocfs2_inline_data *idata = &di->id2.i_data;
1648 le16_add_cpu(&idata->id_count, -xattrsize);
1649 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
1650 struct ocfs2_extent_list *el = &di->id2.i_list;
1651 le16_add_cpu(&el->l_count, -(xattrsize /
1652 sizeof(struct ocfs2_extent_rec)));
1653 }
1654 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
1655 }
1656 /* Update xattr flag */
1657 spin_lock(&oi->ip_lock);
1658 oi->ip_dyn_features |= flag;
1659 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1660 spin_unlock(&oi->ip_lock);
1661 /* Update inode ctime */
1662 inode->i_ctime = CURRENT_TIME;
1663 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1664 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1665
1666 ret = ocfs2_journal_dirty(handle, xs->inode_bh);
1667 if (ret < 0)
1668 mlog_errno(ret);
1669
cf1d6c76
TY		 1670 if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1671 /*
1672 * Set value outside in B tree.
1673 * This is the second step for value size > INLINE_SIZE.
1674 */
1675 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
78f30c31 1676 ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs);
cf1d6c76
TY		 1677 if (ret < 0) {
1678 int ret2;
1679
1680 mlog_errno(ret);
1681 /*
1682 * If set value outside failed, we have to clean
1683 * the junk tree root we have already set in local.
1684 */
85db90e7
TM		 1685 ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
1686 xi, xs, offs);
cf1d6c76
TY		 1687 if (ret2 < 0)
1688 mlog_errno(ret2);
1689 }
1690 }
1691out:
1692 return ret;
cf1d6c76
TY		 1693}
1694
cf1d6c76
TY		 1695static int ocfs2_remove_value_outside(struct inode*inode,
1696 struct buffer_head *bh,
1697 struct ocfs2_xattr_header *header)
1698{
1699 int ret = 0, i;
78f30c31
TM		 1700 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1701 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
1702
1703 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
cf1d6c76 1704
a90714c1
JK		 1705 ctxt.handle = ocfs2_start_trans(osb,
1706 ocfs2_remove_extent_credits(osb->sb));
85db90e7
TM		 1707 if (IS_ERR(ctxt.handle)) {
1708 ret = PTR_ERR(ctxt.handle);
1709 mlog_errno(ret);
1710 goto out;
1711 }
1712
cf1d6c76
TY		 1713 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
1714 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
1715
1716 if (!ocfs2_xattr_is_local(entry)) {
1717 struct ocfs2_xattr_value_root *xv;
1718 void *val;
1719
1720 val = (void *)header +
1721 le16_to_cpu(entry->xe_name_offset);
1722 xv = (struct ocfs2_xattr_value_root *)
1723 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
78f30c31
TM		 1724 ret = ocfs2_xattr_value_truncate(inode, bh, xv,
1725 0, &ctxt);
cf1d6c76
TY		 1726 if (ret < 0) {
1727 mlog_errno(ret);
78f30c31 1728 break;
cf1d6c76
TY		 1729 }
1730 }
1731 }
1732
85db90e7 1733 ocfs2_commit_trans(osb, ctxt.handle);
78f30c31
TM		 1734 ocfs2_schedule_truncate_log_flush(osb, 1);
1735 ocfs2_run_deallocs(osb, &ctxt.dealloc);
85db90e7 1736out:
cf1d6c76
TY		 1737 return ret;
1738}
1739
1740static int ocfs2_xattr_ibody_remove(struct inode *inode,
1741 struct buffer_head *di_bh)
1742{
1743
1744 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1745 struct ocfs2_xattr_header *header;
1746 int ret;
1747
1748 header = (struct ocfs2_xattr_header *)
1749 ((void *)di + inode->i_sb->s_blocksize -
1750 le16_to_cpu(di->i_xattr_inline_size));
1751
1752 ret = ocfs2_remove_value_outside(inode, di_bh, header);
1753
1754 return ret;
1755}
1756
1757static int ocfs2_xattr_block_remove(struct inode *inode,
1758 struct buffer_head *blk_bh)
1759{
1760 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 1761 int ret = 0;
1762
1763 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
a3944256
TM		 1764 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1765 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
1766 ret = ocfs2_remove_value_outside(inode, blk_bh, header);
1767 } else
1768 ret = ocfs2_delete_xattr_index_block(inode, blk_bh);
cf1d6c76
TY		 1769
1770 return ret;
1771}
1772
08413899
TM		 1773static int ocfs2_xattr_free_block(struct inode *inode,
1774 u64 block)
1775{
1776 struct inode *xb_alloc_inode;
1777 struct buffer_head *xb_alloc_bh = NULL;
1778 struct buffer_head *blk_bh = NULL;
1779 struct ocfs2_xattr_block *xb;
1780 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1781 handle_t *handle;
1782 int ret = 0;
1783 u64 blk, bg_blkno;
1784 u16 bit;
1785
4ae1d69b 1786 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
08413899
TM		 1787 if (ret < 0) {
1788 mlog_errno(ret);
1789 goto out;
1790 }
1791
08413899
TM		 1792 ret = ocfs2_xattr_block_remove(inode, blk_bh);
1793 if (ret < 0) {
1794 mlog_errno(ret);
1795 goto out;
1796 }
1797
4ae1d69b 1798 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
08413899
TM		 1799 blk = le64_to_cpu(xb->xb_blkno);
1800 bit = le16_to_cpu(xb->xb_suballoc_bit);
1801 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
1802
1803 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
1804 EXTENT_ALLOC_SYSTEM_INODE,
1805 le16_to_cpu(xb->xb_suballoc_slot));
1806 if (!xb_alloc_inode) {
1807 ret = -ENOMEM;
1808 mlog_errno(ret);
1809 goto out;
1810 }
1811 mutex_lock(&xb_alloc_inode->i_mutex);
1812
1813 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
1814 if (ret < 0) {
1815 mlog_errno(ret);
1816 goto out_mutex;
1817 }
1818
1819 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
1820 if (IS_ERR(handle)) {
1821 ret = PTR_ERR(handle);
1822 mlog_errno(ret);
1823 goto out_unlock;
1824 }
1825
1826 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
1827 bit, bg_blkno, 1);
1828 if (ret < 0)
1829 mlog_errno(ret);
1830
1831 ocfs2_commit_trans(osb, handle);
1832out_unlock:
1833 ocfs2_inode_unlock(xb_alloc_inode, 1);
1834 brelse(xb_alloc_bh);
1835out_mutex:
1836 mutex_unlock(&xb_alloc_inode->i_mutex);
1837 iput(xb_alloc_inode);
1838out:
1839 brelse(blk_bh);
1840 return ret;
1841}
1842
cf1d6c76
TY		 1843/*
1844 * ocfs2_xattr_remove()
1845 *
1846 * Free extended attribute resources associated with this inode.
1847 */
1848int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
1849{
cf1d6c76
TY		 1850 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1851 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1852 handle_t *handle;
1853 int ret;
1854
8154da3d
TY		 1855 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1856 return 0;
1857
cf1d6c76
TY		 1858 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1859 return 0;
1860
1861 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1862 ret = ocfs2_xattr_ibody_remove(inode, di_bh);
1863 if (ret < 0) {
1864 mlog_errno(ret);
1865 goto out;
1866 }
1867 }
cf1d6c76 1868
08413899
TM		 1869 if (di->i_xattr_loc) {
1870 ret = ocfs2_xattr_free_block(inode,
1871 le64_to_cpu(di->i_xattr_loc));
cf1d6c76
TY		 1872 if (ret < 0) {
1873 mlog_errno(ret);
1874 goto out;
1875 }
1876 }
1877
1878 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
1879 OCFS2_INODE_UPDATE_CREDITS);
1880 if (IS_ERR(handle)) {
1881 ret = PTR_ERR(handle);
1882 mlog_errno(ret);
1883 goto out;
1884 }
1885 ret = ocfs2_journal_access(handle, inode, di_bh,
1886 OCFS2_JOURNAL_ACCESS_WRITE);
1887 if (ret) {
1888 mlog_errno(ret);
1889 goto out_commit;
1890 }
1891
08413899 1892 di->i_xattr_loc = 0;
cf1d6c76
TY		 1893
1894 spin_lock(&oi->ip_lock);
1895 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
1896 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1897 spin_unlock(&oi->ip_lock);
1898
1899 ret = ocfs2_journal_dirty(handle, di_bh);
1900 if (ret < 0)
1901 mlog_errno(ret);
1902out_commit:
1903 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
1904out:
cf1d6c76
TY		 1905 return ret;
1906}
1907
1908static int ocfs2_xattr_has_space_inline(struct inode *inode,
1909 struct ocfs2_dinode *di)
1910{
1911 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1912 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
1913 int free;
1914
1915 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
1916 return 0;
1917
1918 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1919 struct ocfs2_inline_data *idata = &di->id2.i_data;
1920 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
1921 } else if (ocfs2_inode_is_fast_symlink(inode)) {
1922 free = ocfs2_fast_symlink_chars(inode->i_sb) -
1923 le64_to_cpu(di->i_size);
1924 } else {
1925 struct ocfs2_extent_list *el = &di->id2.i_list;
1926 free = (le16_to_cpu(el->l_count) -
1927 le16_to_cpu(el->l_next_free_rec)) *
1928 sizeof(struct ocfs2_extent_rec);
1929 }
1930 if (free >= xattrsize)
1931 return 1;
1932
1933 return 0;
1934}
1935
1936/*
1937 * ocfs2_xattr_ibody_find()
1938 *
1939 * Find extended attribute in inode block and
1940 * fill search info into struct ocfs2_xattr_search.
1941 */
1942static int ocfs2_xattr_ibody_find(struct inode *inode,
1943 int name_index,
1944 const char *name,
1945 struct ocfs2_xattr_search *xs)
1946{
1947 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1948 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1949 int ret;
1950 int has_space = 0;
1951
1952 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
1953 return 0;
1954
1955 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
1956 down_read(&oi->ip_alloc_sem);
1957 has_space = ocfs2_xattr_has_space_inline(inode, di);
1958 up_read(&oi->ip_alloc_sem);
1959 if (!has_space)
1960 return 0;
1961 }
1962
1963 xs->xattr_bh = xs->inode_bh;
1964 xs->end = (void *)di + inode->i_sb->s_blocksize;
1965 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
1966 xs->header = (struct ocfs2_xattr_header *)
1967 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1968 else
1969 xs->header = (struct ocfs2_xattr_header *)
1970 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
1971 xs->base = (void *)xs->header;
1972 xs->here = xs->header->xh_entries;
1973
1974 /* Find the named attribute. */
1975 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1976 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1977 if (ret && ret != -ENODATA)
1978 return ret;
1979 xs->not_found = ret;
1980 }
1981
1982 return 0;
1983}
1984
1985/*
1986 * ocfs2_xattr_ibody_set()
1987 *
1988 * Set, replace or remove an extended attribute into inode block.
1989 *
1990 */
1991static int ocfs2_xattr_ibody_set(struct inode *inode,
1992 struct ocfs2_xattr_info *xi,
78f30c31
TM		 1993 struct ocfs2_xattr_search *xs,
1994 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76
TY		 1995{
1996 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1997 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1998 int ret;
1999
2000 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2001 return -ENOSPC;
2002
2003 down_write(&oi->ip_alloc_sem);
2004 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2005 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2006 ret = -ENOSPC;
2007 goto out;
2008 }
2009 }
2010
78f30c31 2011 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
cf1d6c76
TY		 2012 (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
2013out:
2014 up_write(&oi->ip_alloc_sem);
2015
2016 return ret;
2017}
2018
2019/*
2020 * ocfs2_xattr_block_find()
2021 *
2022 * Find extended attribute in external block and
2023 * fill search info into struct ocfs2_xattr_search.
2024 */
2025static int ocfs2_xattr_block_find(struct inode *inode,
2026 int name_index,
2027 const char *name,
2028 struct ocfs2_xattr_search *xs)
2029{
2030 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2031 struct buffer_head *blk_bh = NULL;
589dc260 2032 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 2033 int ret = 0;
2034
2035 if (!di->i_xattr_loc)
2036 return ret;
2037
4ae1d69b
JB		 2038 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2039 &blk_bh);
cf1d6c76
TY		 2040 if (ret < 0) {
2041 mlog_errno(ret);
2042 return ret;
2043 }
f6087fb7 2044
cf1d6c76 2045 xs->xattr_bh = blk_bh;
4ae1d69b 2046 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
589dc260
TM		 2047
2048 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2049 xs->header = &xb->xb_attrs.xb_header;
2050 xs->base = (void *)xs->header;
2051 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2052 xs->here = xs->header->xh_entries;
2053
2054 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2055 } else
2056 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2057 name_index,
2058 name, xs);
cf1d6c76 2059
cf1d6c76
TY		 2060 if (ret && ret != -ENODATA) {
2061 xs->xattr_bh = NULL;
2062 goto cleanup;
2063 }
2064 xs->not_found = ret;
2065 return 0;
cf1d6c76
TY		 2066cleanup:
2067 brelse(blk_bh);
2068
2069 return ret;
2070}
2071
2072/*
2073 * ocfs2_xattr_block_set()
2074 *
2075 * Set, replace or remove an extended attribute into external block.
2076 *
2077 */
2078static int ocfs2_xattr_block_set(struct inode *inode,
2079 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2080 struct ocfs2_xattr_search *xs,
2081 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76
TY		 2082{
2083 struct buffer_head *new_bh = NULL;
2084 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2085 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
85db90e7 2086 handle_t *handle = ctxt->handle;
cf1d6c76
TY		 2087 struct ocfs2_xattr_block *xblk = NULL;
2088 u16 suballoc_bit_start;
2089 u32 num_got;
2090 u64 first_blkno;
2091 int ret;
2092
2093 if (!xs->xattr_bh) {
cf1d6c76
TY		 2094 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
2095 OCFS2_JOURNAL_ACCESS_CREATE);
2096 if (ret < 0) {
2097 mlog_errno(ret);
85db90e7 2098 goto end;
cf1d6c76
TY		 2099 }
2100
78f30c31 2101 ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
cf1d6c76
TY		 2102 &suballoc_bit_start, &num_got,
2103 &first_blkno);
2104 if (ret < 0) {
2105 mlog_errno(ret);
85db90e7 2106 goto end;
cf1d6c76
TY		 2107 }
2108
2109 new_bh = sb_getblk(inode->i_sb, first_blkno);
2110 ocfs2_set_new_buffer_uptodate(inode, new_bh);
2111
2112 ret = ocfs2_journal_access(handle, inode, new_bh,
2113 OCFS2_JOURNAL_ACCESS_CREATE);
2114 if (ret < 0) {
2115 mlog_errno(ret);
85db90e7 2116 goto end;
cf1d6c76
TY		 2117 }
2118
2119 /* Initialize ocfs2_xattr_block */
2120 xs->xattr_bh = new_bh;
2121 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2122 memset(xblk, 0, inode->i_sb->s_blocksize);
2123 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
2124 xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
2125 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
2126 xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
2127 xblk->xb_blkno = cpu_to_le64(first_blkno);
2128
2129 xs->header = &xblk->xb_attrs.xb_header;
2130 xs->base = (void *)xs->header;
2131 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2132 xs->here = xs->header->xh_entries;
2133
cf1d6c76
TY		 2134 ret = ocfs2_journal_dirty(handle, new_bh);
2135 if (ret < 0) {
2136 mlog_errno(ret);
85db90e7 2137 goto end;
cf1d6c76
TY		 2138 }
2139 di->i_xattr_loc = cpu_to_le64(first_blkno);
85db90e7 2140 ocfs2_journal_dirty(handle, xs->inode_bh);
01225596
TM		 2141 } else
2142 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2143
2144 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
2145 /* Set extended attribute into external block */
78f30c31
TM		 2146 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2147 OCFS2_HAS_XATTR_FL);
01225596
TM		 2148 if (!ret || ret != -ENOSPC)
2149 goto end;
2150
78f30c31 2151 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
01225596
TM		 2152 if (ret)
2153 goto end;
cf1d6c76
TY		 2154 }
2155
78f30c31 2156 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
01225596
TM		 2157
2158end:
cf1d6c76
TY		 2159
2160 return ret;
2161}
2162
78f30c31
TM		 2163/* Check whether the new xattr can be inserted into the inode. */
2164static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2165 struct ocfs2_xattr_info *xi,
2166 struct ocfs2_xattr_search *xs)
2167{
2168 u64 value_size;
2169 struct ocfs2_xattr_entry *last;
2170 int free, i;
2171 size_t min_offs = xs->end - xs->base;
2172
2173 if (!xs->header)
2174 return 0;
2175
2176 last = xs->header->xh_entries;
2177
2178 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
2179 size_t offs = le16_to_cpu(last->xe_name_offset);
2180 if (offs < min_offs)
2181 min_offs = offs;
2182 last += 1;
2183 }
2184
2185 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
2186 if (free < 0)
2187 return 0;
2188
2189 BUG_ON(!xs->not_found);
2190
2191 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2192 value_size = OCFS2_XATTR_ROOT_SIZE;
2193 else
2194 value_size = OCFS2_XATTR_SIZE(xi->value_len);
2195
2196 if (free >= sizeof(struct ocfs2_xattr_entry) +
2197 OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
2198 return 1;
2199
2200 return 0;
2201}
2202
2203static int ocfs2_calc_xattr_set_need(struct inode *inode,
2204 struct ocfs2_dinode *di,
2205 struct ocfs2_xattr_info *xi,
2206 struct ocfs2_xattr_search *xis,
2207 struct ocfs2_xattr_search *xbs,
2208 int *clusters_need,
85db90e7
TM		 2209 int *meta_need,
2210 int *credits_need)
78f30c31
TM		 2211{
2212 int ret = 0, old_in_xb = 0;
85db90e7 2213 int clusters_add = 0, meta_add = 0, credits = 0;
78f30c31
TM		 2214 struct buffer_head *bh = NULL;
2215 struct ocfs2_xattr_block *xb = NULL;
2216 struct ocfs2_xattr_entry *xe = NULL;
2217 struct ocfs2_xattr_value_root *xv = NULL;
2218 char *base = NULL;
2219 int name_offset, name_len = 0;
2220 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2221 xi->value_len);
2222 u64 value_size;
2223
78f30c31 2224 if (xis->not_found && xbs->not_found) {
85db90e7
TM		 2225 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2226
2227 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31 2228 clusters_add += new_clusters;
85db90e7
TM		 2229 credits += ocfs2_calc_extend_credits(inode->i_sb,
2230 &def_xv.xv.xr_list,
2231 new_clusters);
2232 }
78f30c31
TM		 2233
2234 goto meta_guess;
2235 }
2236
2237 if (!xis->not_found) {
2238 xe = xis->here;
2239 name_offset = le16_to_cpu(xe->xe_name_offset);
2240 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2241 base = xis->base;
85db90e7 2242 credits += OCFS2_INODE_UPDATE_CREDITS;
78f30c31 2243 } else {
970e4936 2244 int i, block_off = 0;
78f30c31
TM		 2245 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2246 xe = xbs->here;
2247 name_offset = le16_to_cpu(xe->xe_name_offset);
2248 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2249 i = xbs->here - xbs->header->xh_entries;
2250 old_in_xb = 1;
2251
2252 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2253 ret = ocfs2_xattr_bucket_get_name_value(inode,
2254 bucket_xh(xbs->bucket),
2255 i, &block_off,
2256 &name_offset);
2257 base = bucket_block(xbs->bucket, block_off);
85db90e7
TM		 2258 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2259 } else {
78f30c31 2260 base = xbs->base;
85db90e7
TM		 2261 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
2262 }
2263 }
2264
2265 /*
2266 * delete a xattr doesn't need metadata and cluster allocation.
2267 * so just calculate the credits and return.
2268 *
2269 * The credits for removing the value tree will be extended
2270 * by ocfs2_remove_extent itself.
2271 */
2272 if (!xi->value) {
2273 if (!ocfs2_xattr_is_local(xe))
a90714c1 2274 credits += ocfs2_remove_extent_credits(inode->i_sb);
85db90e7
TM		 2275
2276 goto out;
78f30c31
TM		 2277 }
2278
2279 /* do cluster allocation guess first. */
2280 value_size = le64_to_cpu(xe->xe_value_size);
2281
2282 if (old_in_xb) {
2283 /*
2284 * In xattr set, we always try to set the xe in inode first,
2285 * so if it can be inserted into inode successfully, the old
2286 * one will be removed from the xattr block, and this xattr
2287 * will be inserted into inode as a new xattr in inode.
2288 */
2289 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
2290 clusters_add += new_clusters;
a90714c1 2291 credits += ocfs2_remove_extent_credits(inode->i_sb) +
85db90e7
TM		 2292 OCFS2_INODE_UPDATE_CREDITS;
2293 if (!ocfs2_xattr_is_local(xe))
2294 credits += ocfs2_calc_extend_credits(
2295 inode->i_sb,
2296 &def_xv.xv.xr_list,
2297 new_clusters);
78f30c31
TM		 2298 goto out;
2299 }
2300 }
2301
2302 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2303 /* the new values will be stored outside. */
2304 u32 old_clusters = 0;
2305
2306 if (!ocfs2_xattr_is_local(xe)) {
2307 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2308 value_size);
2309 xv = (struct ocfs2_xattr_value_root *)
2310 (base + name_offset + name_len);
97aff52a 2311 value_size = OCFS2_XATTR_ROOT_SIZE;
78f30c31
TM		 2312 } else
2313 xv = &def_xv.xv;
2314
85db90e7 2315 if (old_clusters >= new_clusters) {
a90714c1 2316 credits += ocfs2_remove_extent_credits(inode->i_sb);
78f30c31 2317 goto out;
85db90e7 2318 } else {
78f30c31
TM		 2319 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
2320 clusters_add += new_clusters - old_clusters;
85db90e7
TM		 2321 credits += ocfs2_calc_extend_credits(inode->i_sb,
2322 &xv->xr_list,
2323 new_clusters -
2324 old_clusters);
97aff52a
TM		 2325 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
2326 goto out;
78f30c31
TM		 2327 }
2328 } else {
2329 /*
2330 * Now the new value will be stored inside. So if the new
2331 * value is smaller than the size of value root or the old
2332 * value, we don't need any allocation, otherwise we have
2333 * to guess metadata allocation.
2334 */
2335 if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
2336 (!ocfs2_xattr_is_local(xe) &&
2337 OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
2338 goto out;
2339 }
2340
2341meta_guess:
2342 /* calculate metadata allocation. */
2343 if (di->i_xattr_loc) {
2344 if (!xbs->xattr_bh) {
4ae1d69b
JB		 2345 ret = ocfs2_read_xattr_block(inode,
2346 le64_to_cpu(di->i_xattr_loc),
2347 &bh);
78f30c31
TM		 2348 if (ret) {
2349 mlog_errno(ret);
2350 goto out;
2351 }
2352
2353 xb = (struct ocfs2_xattr_block *)bh->b_data;
2354 } else
2355 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2356
2357 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2358 struct ocfs2_extent_list *el =
2359 &xb->xb_attrs.xb_root.xt_list;
2360 meta_add += ocfs2_extend_meta_needed(el);
85db90e7
TM		 2361 credits += ocfs2_calc_extend_credits(inode->i_sb,
2362 el, 1);
78f30c31
TM		 2363 }
2364
2365 /*
2366 * This cluster will be used either for new bucket or for
2367 * new xattr block.
2368 * If the cluster size is the same as the bucket size, one
2369 * more is needed since we may need to extend the bucket
2370 * also.
2371 */
2372 clusters_add += 1;
85db90e7 2373 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 2374 if (OCFS2_XATTR_BUCKET_SIZE ==
85db90e7
TM		 2375 OCFS2_SB(inode->i_sb)->s_clustersize) {
2376 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 2377 clusters_add += 1;
85db90e7
TM		 2378 }
2379 } else {
78f30c31 2380 meta_add += 1;
85db90e7
TM		 2381 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
2382 }
78f30c31
TM		 2383out:
2384 if (clusters_need)
2385 *clusters_need = clusters_add;
2386 if (meta_need)
2387 *meta_need = meta_add;
85db90e7
TM		 2388 if (credits_need)
2389 *credits_need = credits;
78f30c31
TM		 2390 brelse(bh);
2391 return ret;
2392}
2393
2394static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
2395 struct ocfs2_dinode *di,
2396 struct ocfs2_xattr_info *xi,
2397 struct ocfs2_xattr_search *xis,
2398 struct ocfs2_xattr_search *xbs,
85db90e7
TM		 2399 struct ocfs2_xattr_set_ctxt *ctxt,
2400 int *credits)
78f30c31
TM		 2401{
2402 int clusters_add, meta_add, ret;
2403 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2404
2405 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
2406
2407 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
2408
2409 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
85db90e7 2410 &clusters_add, &meta_add, credits);
78f30c31
TM		 2411 if (ret) {
2412 mlog_errno(ret);
2413 return ret;
2414 }
2415
85db90e7
TM		 2416 mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
2417 "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
78f30c31
TM		 2418
2419 if (meta_add) {
2420 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
2421 &ctxt->meta_ac);
2422 if (ret) {
2423 mlog_errno(ret);
2424 goto out;
2425 }
2426 }
2427
2428 if (clusters_add) {
2429 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
2430 if (ret)
2431 mlog_errno(ret);
2432 }
2433out:
2434 if (ret) {
2435 if (ctxt->meta_ac) {
2436 ocfs2_free_alloc_context(ctxt->meta_ac);
2437 ctxt->meta_ac = NULL;
2438 }
2439
2440 /*
2441 * We cannot have an error and a non null ctxt->data_ac.
2442 */
2443 }
2444
2445 return ret;
2446}
2447
85db90e7
TM		 2448static int __ocfs2_xattr_set_handle(struct inode *inode,
2449 struct ocfs2_dinode *di,
2450 struct ocfs2_xattr_info *xi,
2451 struct ocfs2_xattr_search *xis,
2452 struct ocfs2_xattr_search *xbs,
2453 struct ocfs2_xattr_set_ctxt *ctxt)
2454{
9f868f16 2455 int ret = 0, credits, old_found;
85db90e7
TM		 2456
2457 if (!xi->value) {
2458 /* Remove existing extended attribute */
2459 if (!xis->not_found)
2460 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2461 else if (!xbs->not_found)
2462 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2463 } else {
2464 /* We always try to set extended attribute into inode first*/
2465 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2466 if (!ret && !xbs->not_found) {
2467 /*
2468 * If succeed and that extended attribute existing in
2469 * external block, then we will remove it.
2470 */
2471 xi->value = NULL;
2472 xi->value_len = 0;
2473
9f868f16 2474 old_found = xis->not_found;
85db90e7
TM		 2475 xis->not_found = -ENODATA;
2476 ret = ocfs2_calc_xattr_set_need(inode,
2477 di,
2478 xi,
2479 xis,
2480 xbs,
2481 NULL,
2482 NULL,
2483 &credits);
9f868f16 2484 xis->not_found = old_found;
85db90e7
TM		 2485 if (ret) {
2486 mlog_errno(ret);
2487 goto out;
2488 }
2489
2490 ret = ocfs2_extend_trans(ctxt->handle, credits +
2491 ctxt->handle->h_buffer_credits);
2492 if (ret) {
2493 mlog_errno(ret);
2494 goto out;
2495 }
2496 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2497 } else if (ret == -ENOSPC) {
2498 if (di->i_xattr_loc && !xbs->xattr_bh) {
2499 ret = ocfs2_xattr_block_find(inode,
2500 xi->name_index,
2501 xi->name, xbs);
2502 if (ret)
2503 goto out;
2504
9f868f16 2505 old_found = xis->not_found;
85db90e7
TM		 2506 xis->not_found = -ENODATA;
2507 ret = ocfs2_calc_xattr_set_need(inode,
2508 di,
2509 xi,
2510 xis,
2511 xbs,
2512 NULL,
2513 NULL,
2514 &credits);
9f868f16 2515 xis->not_found = old_found;
85db90e7
TM		 2516 if (ret) {
2517 mlog_errno(ret);
2518 goto out;
2519 }
2520
2521 ret = ocfs2_extend_trans(ctxt->handle, credits +
2522 ctxt->handle->h_buffer_credits);
2523 if (ret) {
2524 mlog_errno(ret);
2525 goto out;
2526 }
2527 }
2528 /*
2529 * If no space in inode, we will set extended attribute
2530 * into external block.
2531 */
2532 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2533 if (ret)
2534 goto out;
2535 if (!xis->not_found) {
2536 /*
2537 * If succeed and that extended attribute
2538 * existing in inode, we will remove it.
2539 */
2540 xi->value = NULL;
2541 xi->value_len = 0;
2542 xbs->not_found = -ENODATA;
2543 ret = ocfs2_calc_xattr_set_need(inode,
2544 di,
2545 xi,
2546 xis,
2547 xbs,
2548 NULL,
2549 NULL,
2550 &credits);
2551 if (ret) {
2552 mlog_errno(ret);
2553 goto out;
2554 }
2555
2556 ret = ocfs2_extend_trans(ctxt->handle, credits +
2557 ctxt->handle->h_buffer_credits);
2558 if (ret) {
2559 mlog_errno(ret);
2560 goto out;
2561 }
2562 ret = ocfs2_xattr_ibody_set(inode, xi,
2563 xis, ctxt);
2564 }
2565 }
2566 }
2567
2568out:
2569 return ret;
2570}
2571
6c3faba4
TY		 2572/*
2573 * This function only called duing creating inode
2574 * for init security/acl xattrs of the new inode.
2575 * The xattrs could be put into ibody or extent block,
2576 * xattr bucket would not be use in this case.
2577 * transanction credits also be reserved in here.
2578 */
2579int ocfs2_xattr_set_handle(handle_t *handle,
2580 struct inode *inode,
2581 struct buffer_head *di_bh,
2582 int name_index,
2583 const char *name,
2584 const void *value,
2585 size_t value_len,
2586 int flags,
2587 struct ocfs2_alloc_context *meta_ac,
2588 struct ocfs2_alloc_context *data_ac)
2589{
2590 struct ocfs2_dinode *di;
2591 int ret;
2592
2593 struct ocfs2_xattr_info xi = {
2594 .name_index = name_index,
2595 .name = name,
2596 .value = value,
2597 .value_len = value_len,
2598 };
2599
2600 struct ocfs2_xattr_search xis = {
2601 .not_found = -ENODATA,
2602 };
2603
2604 struct ocfs2_xattr_search xbs = {
2605 .not_found = -ENODATA,
2606 };
2607
2608 struct ocfs2_xattr_set_ctxt ctxt = {
2609 .handle = handle,
2610 .meta_ac = meta_ac,
2611 .data_ac = data_ac,
2612 };
2613
2614 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2615 return -EOPNOTSUPP;
2616
2617 xis.inode_bh = xbs.inode_bh = di_bh;
2618 di = (struct ocfs2_dinode *)di_bh->b_data;
2619
2620 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2621
2622 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2623 if (ret)
2624 goto cleanup;
2625 if (xis.not_found) {
2626 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2627 if (ret)
2628 goto cleanup;
2629 }
2630
2631 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2632
2633cleanup:
2634 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2635 brelse(xbs.xattr_bh);
2636
2637 return ret;
2638}
2639
cf1d6c76
TY		 2640/*
2641 * ocfs2_xattr_set()
2642 *
2643 * Set, replace or remove an extended attribute for this inode.
2644 * value is NULL to remove an existing extended attribute, else either
2645 * create or replace an extended attribute.
2646 */
2647int ocfs2_xattr_set(struct inode *inode,
2648 int name_index,
2649 const char *name,
2650 const void *value,
2651 size_t value_len,
2652 int flags)
2653{
2654 struct buffer_head *di_bh = NULL;
2655 struct ocfs2_dinode *di;
85db90e7 2656 int ret, credits;
78f30c31 2657 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
85db90e7 2658 struct inode *tl_inode = osb->osb_tl_inode;
78f30c31 2659 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
cf1d6c76
TY		 2660
2661 struct ocfs2_xattr_info xi = {
2662 .name_index = name_index,
2663 .name = name,
2664 .value = value,
2665 .value_len = value_len,
2666 };
2667
2668 struct ocfs2_xattr_search xis = {
2669 .not_found = -ENODATA,
2670 };
2671
2672 struct ocfs2_xattr_search xbs = {
2673 .not_found = -ENODATA,
2674 };
2675
8154da3d
TY		 2676 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2677 return -EOPNOTSUPP;
2678
ba937127
JB		 2679 /*
2680 * Only xbs will be used on indexed trees. xis doesn't need a
2681 * bucket.
2682 */
2683 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2684 if (!xbs.bucket) {
2685 mlog_errno(-ENOMEM);
2686 return -ENOMEM;
2687 }
2688
cf1d6c76
TY		 2689 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2690 if (ret < 0) {
2691 mlog_errno(ret);
ba937127 2692 goto cleanup_nolock;
cf1d6c76
TY		 2693 }
2694 xis.inode_bh = xbs.inode_bh = di_bh;
2695 di = (struct ocfs2_dinode *)di_bh->b_data;
2696
2697 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2698 /*
2699 * Scan inode and external block to find the same name
2700 * extended attribute and collect search infomation.
2701 */
2702 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2703 if (ret)
2704 goto cleanup;
2705 if (xis.not_found) {
2706 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2707 if (ret)
2708 goto cleanup;
2709 }
2710
2711 if (xis.not_found && xbs.not_found) {
2712 ret = -ENODATA;
2713 if (flags & XATTR_REPLACE)
2714 goto cleanup;
2715 ret = 0;
2716 if (!value)
2717 goto cleanup;
2718 } else {
2719 ret = -EEXIST;
2720 if (flags & XATTR_CREATE)
2721 goto cleanup;
2722 }
2723
85db90e7
TM		 2724
2725 mutex_lock(&tl_inode->i_mutex);
2726
2727 if (ocfs2_truncate_log_needs_flush(osb)) {
2728 ret = __ocfs2_flush_truncate_log(osb);
2729 if (ret < 0) {
2730 mutex_unlock(&tl_inode->i_mutex);
2731 mlog_errno(ret);
2732 goto cleanup;
2733 }
2734 }
2735 mutex_unlock(&tl_inode->i_mutex);
2736
2737 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
2738 &xbs, &ctxt, &credits);
78f30c31
TM		 2739 if (ret) {
2740 mlog_errno(ret);
2741 goto cleanup;
2742 }
2743
85db90e7
TM		 2744 ctxt.handle = ocfs2_start_trans(osb, credits);
2745 if (IS_ERR(ctxt.handle)) {
2746 ret = PTR_ERR(ctxt.handle);
2747 mlog_errno(ret);
2748 goto cleanup;
cf1d6c76 2749 }
85db90e7
TM		 2750
2751 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2752
2753 ocfs2_commit_trans(osb, ctxt.handle);
2754
78f30c31
TM		 2755 if (ctxt.data_ac)
2756 ocfs2_free_alloc_context(ctxt.data_ac);
2757 if (ctxt.meta_ac)
2758 ocfs2_free_alloc_context(ctxt.meta_ac);
2759 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
2760 ocfs2_schedule_truncate_log_flush(osb, 1);
2761 ocfs2_run_deallocs(osb, &ctxt.dealloc);
cf1d6c76
TY		 2762cleanup:
2763 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2764 ocfs2_inode_unlock(inode, 1);
ba937127 2765cleanup_nolock:
cf1d6c76
TY		 2766 brelse(di_bh);
2767 brelse(xbs.xattr_bh);
ba937127 2768 ocfs2_xattr_bucket_free(xbs.bucket);
cf1d6c76
TY		 2769
2770 return ret;
2771}
2772
0c044f0b
TM		 2773/*
2774 * Find the xattr extent rec which may contains name_hash.
2775 * e_cpos will be the first name hash of the xattr rec.
2776 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
2777 */
2778static int ocfs2_xattr_get_rec(struct inode *inode,
2779 u32 name_hash,
2780 u64 *p_blkno,
2781 u32 *e_cpos,
2782 u32 *num_clusters,
2783 struct ocfs2_extent_list *el)
2784{
2785 int ret = 0, i;
2786 struct buffer_head *eb_bh = NULL;
2787 struct ocfs2_extent_block *eb;
2788 struct ocfs2_extent_rec *rec = NULL;
2789 u64 e_blkno = 0;
2790
2791 if (el->l_tree_depth) {
2792 ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh);
2793 if (ret) {
2794 mlog_errno(ret);
2795 goto out;
2796 }
2797
2798 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
2799 el = &eb->h_list;
2800
2801 if (el->l_tree_depth) {
2802 ocfs2_error(inode->i_sb,
2803 "Inode %lu has non zero tree depth in "
2804 "xattr tree block %llu\n", inode->i_ino,
2805 (unsigned long long)eb_bh->b_blocknr);
2806 ret = -EROFS;
2807 goto out;
2808 }
2809 }
2810
2811 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
2812 rec = &el->l_recs[i];
2813
2814 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
2815 e_blkno = le64_to_cpu(rec->e_blkno);
2816 break;
2817 }
2818 }
2819
2820 if (!e_blkno) {
2821 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
2822 "record (%u, %u, 0) in xattr", inode->i_ino,
2823 le32_to_cpu(rec->e_cpos),
2824 ocfs2_rec_clusters(el, rec));
2825 ret = -EROFS;
2826 goto out;
2827 }
2828
2829 *p_blkno = le64_to_cpu(rec->e_blkno);
2830 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
2831 if (e_cpos)
2832 *e_cpos = le32_to_cpu(rec->e_cpos);
2833out:
2834 brelse(eb_bh);
2835 return ret;
2836}
2837
2838typedef int (xattr_bucket_func)(struct inode *inode,
2839 struct ocfs2_xattr_bucket *bucket,
2840 void *para);
2841
589dc260 2842static int ocfs2_find_xe_in_bucket(struct inode *inode,
e2356a3f 2843 struct ocfs2_xattr_bucket *bucket,
589dc260
TM		 2844 int name_index,
2845 const char *name,
2846 u32 name_hash,
2847 u16 *xe_index,
2848 int *found)
2849{
2850 int i, ret = 0, cmp = 1, block_off, new_offset;
e2356a3f 2851 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
589dc260
TM		 2852 size_t name_len = strlen(name);
2853 struct ocfs2_xattr_entry *xe = NULL;
589dc260
TM		 2854 char *xe_name;
2855
2856 /*
2857 * We don't use binary search in the bucket because there
2858 * may be multiple entries with the same name hash.
2859 */
2860 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
2861 xe = &xh->xh_entries[i];
2862
2863 if (name_hash > le32_to_cpu(xe->xe_name_hash))
2864 continue;
2865 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
2866 break;
2867
2868 cmp = name_index - ocfs2_xattr_get_type(xe);
2869 if (!cmp)
2870 cmp = name_len - xe->xe_name_len;
2871 if (cmp)
2872 continue;
2873
2874 ret = ocfs2_xattr_bucket_get_name_value(inode,
2875 xh,
2876 i,
2877 &block_off,
2878 &new_offset);
2879 if (ret) {
2880 mlog_errno(ret);
2881 break;
2882 }
2883
970e4936 2884
e2356a3f
JB		 2885 xe_name = bucket_block(bucket, block_off) + new_offset;
2886 if (!memcmp(name, xe_name, name_len)) {
589dc260
TM		 2887 *xe_index = i;
2888 *found = 1;
2889 ret = 0;
2890 break;
2891 }
2892 }
2893
2894 return ret;
2895}
2896
2897/*
2898 * Find the specified xattr entry in a series of buckets.
2899 * This series start from p_blkno and last for num_clusters.
2900 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
2901 * the num of the valid buckets.
2902 *
2903 * Return the buffer_head this xattr should reside in. And if the xattr's
2904 * hash is in the gap of 2 buckets, return the lower bucket.
2905 */
2906static int ocfs2_xattr_bucket_find(struct inode *inode,
2907 int name_index,
2908 const char *name,
2909 u32 name_hash,
2910 u64 p_blkno,
2911 u32 first_hash,
2912 u32 num_clusters,
2913 struct ocfs2_xattr_search *xs)
2914{
2915 int ret, found = 0;
589dc260
TM		 2916 struct ocfs2_xattr_header *xh = NULL;
2917 struct ocfs2_xattr_entry *xe = NULL;
2918 u16 index = 0;
2919 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2920 int low_bucket = 0, bucket, high_bucket;
e2356a3f 2921 struct ocfs2_xattr_bucket *search;
589dc260 2922 u32 last_hash;
e2356a3f 2923 u64 blkno, lower_blkno = 0;
589dc260 2924
e2356a3f
JB		 2925 search = ocfs2_xattr_bucket_new(inode);
2926 if (!search) {
2927 ret = -ENOMEM;
2928 mlog_errno(ret);
2929 goto out;
2930 }
2931
2932 ret = ocfs2_read_xattr_bucket(search, p_blkno);
589dc260
TM		 2933 if (ret) {
2934 mlog_errno(ret);
2935 goto out;
2936 }
2937
e2356a3f 2938 xh = bucket_xh(search);
589dc260 2939 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
589dc260 2940 while (low_bucket <= high_bucket) {
e2356a3f 2941 ocfs2_xattr_bucket_relse(search);
589dc260 2942
e2356a3f 2943 bucket = (low_bucket + high_bucket) / 2;
589dc260 2944 blkno = p_blkno + bucket * blk_per_bucket;
e2356a3f 2945 ret = ocfs2_read_xattr_bucket(search, blkno);
589dc260
TM		 2946 if (ret) {
2947 mlog_errno(ret);
2948 goto out;
2949 }
2950
e2356a3f 2951 xh = bucket_xh(search);
589dc260
TM		 2952 xe = &xh->xh_entries[0];
2953 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
2954 high_bucket = bucket - 1;
2955 continue;
2956 }
2957
2958 /*
2959 * Check whether the hash of the last entry in our
5a095611
TM		 2960 * bucket is larger than the search one. for an empty
2961 * bucket, the last one is also the first one.
589dc260 2962 */
5a095611
TM		 2963 if (xh->xh_count)
2964 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
2965
589dc260
TM		 2966 last_hash = le32_to_cpu(xe->xe_name_hash);
2967
e2356a3f
JB		 2968 /* record lower_blkno which may be the insert place. */
2969 lower_blkno = blkno;
589dc260
TM		 2970
2971 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
2972 low_bucket = bucket + 1;
2973 continue;
2974 }
2975
2976 /* the searched xattr should reside in this bucket if exists. */
e2356a3f 2977 ret = ocfs2_find_xe_in_bucket(inode, search,
589dc260
TM		 2978 name_index, name, name_hash,
2979 &index, &found);
2980 if (ret) {
2981 mlog_errno(ret);
2982 goto out;
2983 }
2984 break;
2985 }
2986
2987 /*
2988 * Record the bucket we have found.
2989 * When the xattr's hash value is in the gap of 2 buckets, we will
2990 * always set it to the previous bucket.
2991 */
e2356a3f
JB		 2992 if (!lower_blkno)
2993 lower_blkno = p_blkno;
2994
2995 /* This should be in cache - we just read it during the search */
2996 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
2997 if (ret) {
2998 mlog_errno(ret);
2999 goto out;
589dc260 3000 }
589dc260 3001
ba937127
JB		 3002 xs->header = bucket_xh(xs->bucket);
3003 xs->base = bucket_block(xs->bucket, 0);
589dc260
TM		 3004 xs->end = xs->base + inode->i_sb->s_blocksize;
3005
3006 if (found) {
589dc260
TM		 3007 xs->here = &xs->header->xh_entries[index];
3008 mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name,
ba937127 3009 (unsigned long long)bucket_blkno(xs->bucket), index);
589dc260
TM		 3010 } else
3011 ret = -ENODATA;
3012
3013out:
e2356a3f 3014 ocfs2_xattr_bucket_free(search);
589dc260
TM		 3015 return ret;
3016}
3017
3018static int ocfs2_xattr_index_block_find(struct inode *inode,
3019 struct buffer_head *root_bh,
3020 int name_index,
3021 const char *name,
3022 struct ocfs2_xattr_search *xs)
3023{
3024 int ret;
3025 struct ocfs2_xattr_block *xb =
3026 (struct ocfs2_xattr_block *)root_bh->b_data;
3027 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3028 struct ocfs2_extent_list *el = &xb_root->xt_list;
3029 u64 p_blkno = 0;
3030 u32 first_hash, num_clusters = 0;
2057e5c6 3031 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
589dc260
TM		 3032
3033 if (le16_to_cpu(el->l_next_free_rec) == 0)
3034 return -ENODATA;
3035
3036 mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n",
3037 name, name_hash, name_index);
3038
3039 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3040 &num_clusters, el);
3041 if (ret) {
3042 mlog_errno(ret);
3043 goto out;
3044 }
3045
3046 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3047
3048 mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
de29c085
MF		 3049 "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
3050 first_hash);
589dc260
TM		 3051
3052 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3053 p_blkno, first_hash, num_clusters, xs);
3054
3055out:
3056 return ret;
3057}
3058
0c044f0b
TM		 3059static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3060 u64 blkno,
3061 u32 clusters,
3062 xattr_bucket_func *func,
3063 void *para)
3064{
6dde41d9 3065 int i, ret = 0;
0c044f0b
TM		 3066 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3067 u32 num_buckets = clusters * bpc;
ba937127 3068 struct ocfs2_xattr_bucket *bucket;
0c044f0b 3069
ba937127
JB		 3070 bucket = ocfs2_xattr_bucket_new(inode);
3071 if (!bucket) {
3072 mlog_errno(-ENOMEM);
3073 return -ENOMEM;
3074 }
0c044f0b
TM		 3075
3076 mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
de29c085 3077 clusters, (unsigned long long)blkno);
0c044f0b 3078
ba937127
JB		 3079 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3080 ret = ocfs2_read_xattr_bucket(bucket, blkno);
0c044f0b
TM		 3081 if (ret) {
3082 mlog_errno(ret);
ba937127 3083 break;
0c044f0b
TM		 3084 }
3085
0c044f0b
TM		 3086 /*
3087 * The real bucket num in this series of blocks is stored
3088 * in the 1st bucket.
3089 */
3090 if (i == 0)
ba937127 3091 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
0c044f0b 3092
de29c085
MF		 3093 mlog(0, "iterating xattr bucket %llu, first hash %u\n",
3094 (unsigned long long)blkno,
ba937127 3095 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
0c044f0b 3096 if (func) {
ba937127
JB		 3097 ret = func(inode, bucket, para);
3098 if (ret)
0c044f0b 3099 mlog_errno(ret);
ba937127 3100 /* Fall through to bucket_relse() */
0c044f0b
TM		 3101 }
3102
ba937127
JB		 3103 ocfs2_xattr_bucket_relse(bucket);
3104 if (ret)
3105 break;
0c044f0b
TM		 3106 }
3107
ba937127 3108 ocfs2_xattr_bucket_free(bucket);
0c044f0b
TM		 3109 return ret;
3110}
3111
3112struct ocfs2_xattr_tree_list {
3113 char *buffer;
3114 size_t buffer_size;
936b8834 3115 size_t result;
0c044f0b
TM		 3116};
3117
3118static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
3119 struct ocfs2_xattr_header *xh,
3120 int index,
3121 int *block_off,
3122 int *new_offset)
3123{
3124 u16 name_offset;
3125
3126 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
3127 return -EINVAL;
3128
3129 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
3130
3131 *block_off = name_offset >> inode->i_sb->s_blocksize_bits;
3132 *new_offset = name_offset % inode->i_sb->s_blocksize;
3133
3134 return 0;
3135}
3136
3137static int ocfs2_list_xattr_bucket(struct inode *inode,
3138 struct ocfs2_xattr_bucket *bucket,
3139 void *para)
3140{
936b8834 3141 int ret = 0, type;
0c044f0b 3142 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
0c044f0b 3143 int i, block_off, new_offset;
936b8834 3144 const char *prefix, *name;
0c044f0b 3145
3e632946
JB		 3146 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
3147 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
936b8834
TM		 3148 type = ocfs2_xattr_get_type(entry);
3149 prefix = ocfs2_xattr_prefix(type);
0c044f0b 3150
936b8834 3151 if (prefix) {
0c044f0b 3152 ret = ocfs2_xattr_bucket_get_name_value(inode,
3e632946 3153 bucket_xh(bucket),
0c044f0b
TM		 3154 i,
3155 &block_off,
3156 &new_offset);
3157 if (ret)
3158 break;
936b8834 3159
51def39f 3160 name = (const char *)bucket_block(bucket, block_off) +
936b8834
TM		 3161 new_offset;
3162 ret = ocfs2_xattr_list_entry(xl->buffer,
3163 xl->buffer_size,
3164 &xl->result,
3165 prefix, name,
3166 entry->xe_name_len);
3167 if (ret)
3168 break;
0c044f0b
TM		 3169 }
3170 }
3171
3172 return ret;
3173}
3174
3175static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
3176 struct ocfs2_xattr_tree_root *xt,
3177 char *buffer,
3178 size_t buffer_size)
3179{
3180 struct ocfs2_extent_list *el = &xt->xt_list;
3181 int ret = 0;
3182 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
3183 u64 p_blkno = 0;
3184 struct ocfs2_xattr_tree_list xl = {
3185 .buffer = buffer,
3186 .buffer_size = buffer_size,
936b8834 3187 .result = 0,
0c044f0b
TM		 3188 };
3189
3190 if (le16_to_cpu(el->l_next_free_rec) == 0)
3191 return 0;
3192
3193 while (name_hash > 0) {
3194 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
3195 &e_cpos, &num_clusters, el);
3196 if (ret) {
3197 mlog_errno(ret);
3198 goto out;
3199 }
3200
3201 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
3202 ocfs2_list_xattr_bucket,
3203 &xl);
3204 if (ret) {
3205 mlog_errno(ret);
3206 goto out;
3207 }
3208
3209 if (e_cpos == 0)
3210 break;
3211
3212 name_hash = e_cpos - 1;
3213 }
3214
936b8834 3215 ret = xl.result;
0c044f0b
TM		 3216out:
3217 return ret;
3218}
01225596
TM		 3219
3220static int cmp_xe(const void *a, const void *b)
3221{
3222 const struct ocfs2_xattr_entry *l = a, *r = b;
3223 u32 l_hash = le32_to_cpu(l->xe_name_hash);
3224 u32 r_hash = le32_to_cpu(r->xe_name_hash);
3225
3226 if (l_hash > r_hash)
3227 return 1;
3228 if (l_hash < r_hash)
3229 return -1;
3230 return 0;
3231}
3232
3233static void swap_xe(void *a, void *b, int size)
3234{
3235 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
3236
3237 tmp = *l;
3238 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
3239 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
3240}
3241
3242/*
3243 * When the ocfs2_xattr_block is filled up, new bucket will be created
3244 * and all the xattr entries will be moved to the new bucket.
178eeac3
JB		 3245 * The header goes at the start of the bucket, and the names+values are
3246 * filled from the end. This is why *target starts as the last buffer.
01225596
TM		 3247 * Note: we need to sort the entries since they are not saved in order
3248 * in the ocfs2_xattr_block.
3249 */
3250static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
3251 struct buffer_head *xb_bh,
178eeac3 3252 struct ocfs2_xattr_bucket *bucket)
01225596
TM		 3253{
3254 int i, blocksize = inode->i_sb->s_blocksize;
178eeac3 3255 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596
TM		 3256 u16 offset, size, off_change;
3257 struct ocfs2_xattr_entry *xe;
3258 struct ocfs2_xattr_block *xb =
3259 (struct ocfs2_xattr_block *)xb_bh->b_data;
3260 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
178eeac3 3261 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 3262 u16 count = le16_to_cpu(xb_xh->xh_count);
178eeac3
JB		 3263 char *src = xb_bh->b_data;
3264 char *target = bucket_block(bucket, blks - 1);
01225596
TM		 3265
3266 mlog(0, "cp xattr from block %llu to bucket %llu\n",
3267 (unsigned long long)xb_bh->b_blocknr,
178eeac3
JB		 3268 (unsigned long long)bucket_blkno(bucket));
3269
3270 for (i = 0; i < blks; i++)
3271 memset(bucket_block(bucket, i), 0, blocksize);
01225596 3272
01225596
TM		 3273 /*
3274 * Since the xe_name_offset is based on ocfs2_xattr_header,
3275 * there is a offset change corresponding to the change of
3276 * ocfs2_xattr_header's position.
3277 */
3278 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3279 xe = &xb_xh->xh_entries[count - 1];
3280 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
3281 size = blocksize - offset;
3282
3283 /* copy all the names and values. */
01225596
TM		 3284 memcpy(target + offset, src + offset, size);
3285
3286 /* Init new header now. */
3287 xh->xh_count = xb_xh->xh_count;
3288 xh->xh_num_buckets = cpu_to_le16(1);
3289 xh->xh_name_value_len = cpu_to_le16(size);
3290 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
3291
3292 /* copy all the entries. */
178eeac3 3293 target = bucket_block(bucket, 0);
01225596
TM		 3294 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
3295 size = count * sizeof(struct ocfs2_xattr_entry);
3296 memcpy(target + offset, (char *)xb_xh + offset, size);
3297
3298 /* Change the xe offset for all the xe because of the move. */
3299 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
3300 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3301 for (i = 0; i < count; i++)
3302 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
3303
3304 mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n",
3305 offset, size, off_change);
3306
3307 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
3308 cmp_xe, swap_xe);
3309}
3310
3311/*
3312 * After we move xattr from block to index btree, we have to
3313 * update ocfs2_xattr_search to the new xe and base.
3314 *
3315 * When the entry is in xattr block, xattr_bh indicates the storage place.
3316 * While if the entry is in index b-tree, "bucket" indicates the
3317 * real place of the xattr.
3318 */
178eeac3
JB		 3319static void ocfs2_xattr_update_xattr_search(struct inode *inode,
3320 struct ocfs2_xattr_search *xs,
3321 struct buffer_head *old_bh)
01225596 3322{
01225596
TM		 3323 char *buf = old_bh->b_data;
3324 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
3325 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
178eeac3 3326 int i;
01225596 3327
ba937127 3328 xs->header = bucket_xh(xs->bucket);
178eeac3 3329 xs->base = bucket_block(xs->bucket, 0);
01225596
TM		 3330 xs->end = xs->base + inode->i_sb->s_blocksize;
3331
178eeac3
JB		 3332 if (xs->not_found)
3333 return;
01225596 3334
178eeac3
JB		 3335 i = xs->here - old_xh->xh_entries;
3336 xs->here = &xs->header->xh_entries[i];
01225596
TM		 3337}
3338
3339static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 3340 struct ocfs2_xattr_search *xs,
3341 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 3342{
85db90e7 3343 int ret;
01225596
TM		 3344 u32 bit_off, len;
3345 u64 blkno;
85db90e7 3346 handle_t *handle = ctxt->handle;
01225596
TM		 3347 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3348 struct ocfs2_inode_info *oi = OCFS2_I(inode);
01225596
TM		 3349 struct buffer_head *xb_bh = xs->xattr_bh;
3350 struct ocfs2_xattr_block *xb =
3351 (struct ocfs2_xattr_block *)xb_bh->b_data;
3352 struct ocfs2_xattr_tree_root *xr;
3353 u16 xb_flags = le16_to_cpu(xb->xb_flags);
01225596
TM		 3354
3355 mlog(0, "create xattr index block for %llu\n",
3356 (unsigned long long)xb_bh->b_blocknr);
3357
3358 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
178eeac3 3359 BUG_ON(!xs->bucket);
01225596 3360
01225596
TM		 3361 /*
3362 * XXX:
3363 * We can use this lock for now, and maybe move to a dedicated mutex
3364 * if performance becomes a problem later.
3365 */
3366 down_write(&oi->ip_alloc_sem);
3367
01225596
TM		 3368 ret = ocfs2_journal_access(handle, inode, xb_bh,
3369 OCFS2_JOURNAL_ACCESS_WRITE);
3370 if (ret) {
3371 mlog_errno(ret);
85db90e7 3372 goto out;
01225596
TM		 3373 }
3374
78f30c31
TM		 3375 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
3376 1, 1, &bit_off, &len);
01225596
TM		 3377 if (ret) {
3378 mlog_errno(ret);
85db90e7 3379 goto out;
01225596
TM		 3380 }
3381
3382 /*
3383 * The bucket may spread in many blocks, and
3384 * we will only touch the 1st block and the last block
3385 * in the whole bucket(one for entry and one for data).
3386 */
3387 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
3388
de29c085
MF		 3389 mlog(0, "allocate 1 cluster from %llu to xattr block\n",
3390 (unsigned long long)blkno);
01225596 3391
178eeac3
JB		 3392 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno);
3393 if (ret) {
01225596 3394 mlog_errno(ret);
85db90e7 3395 goto out;
01225596
TM		 3396 }
3397
178eeac3
JB		 3398 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
3399 OCFS2_JOURNAL_ACCESS_CREATE);
01225596
TM		 3400 if (ret) {
3401 mlog_errno(ret);
85db90e7 3402 goto out;
01225596
TM		 3403 }
3404
178eeac3
JB		 3405 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
3406 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 3407
178eeac3 3408 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
01225596
TM		 3409
3410 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
3411 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
3412 offsetof(struct ocfs2_xattr_block, xb_attrs));
3413
3414 xr = &xb->xb_attrs.xb_root;
3415 xr->xt_clusters = cpu_to_le32(1);
3416 xr->xt_last_eb_blk = 0;
3417 xr->xt_list.l_tree_depth = 0;
3418 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
3419 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
3420
3421 xr->xt_list.l_recs[0].e_cpos = 0;
3422 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
3423 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
3424
3425 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
3426
85db90e7 3427 ocfs2_journal_dirty(handle, xb_bh);
01225596 3428
85db90e7 3429out:
01225596
TM		 3430 up_write(&oi->ip_alloc_sem);
3431
01225596
TM		 3432 return ret;
3433}
3434
3435static int cmp_xe_offset(const void *a, const void *b)
3436{
3437 const struct ocfs2_xattr_entry *l = a, *r = b;
3438 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
3439 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
3440
3441 if (l_name_offset < r_name_offset)
3442 return 1;
3443 if (l_name_offset > r_name_offset)
3444 return -1;
3445 return 0;
3446}
3447
3448/*
3449 * defrag a xattr bucket if we find that the bucket has some
3450 * holes beteen name/value pairs.
3451 * We will move all the name/value pairs to the end of the bucket
3452 * so that we can spare some space for insertion.
3453 */
3454static int ocfs2_defrag_xattr_bucket(struct inode *inode,
85db90e7 3455 handle_t *handle,
01225596
TM		 3456 struct ocfs2_xattr_bucket *bucket)
3457{
3458 int ret, i;
3459 size_t end, offset, len, value_len;
3460 struct ocfs2_xattr_header *xh;
3461 char *entries, *buf, *bucket_buf = NULL;
9c7759aa 3462 u64 blkno = bucket_blkno(bucket);
01225596 3463 u16 xh_free_start;
01225596 3464 size_t blocksize = inode->i_sb->s_blocksize;
01225596 3465 struct ocfs2_xattr_entry *xe;
01225596
TM		 3466
3467 /*
3468 * In order to make the operation more efficient and generic,
3469 * we copy all the blocks into a contiguous memory and do the
3470 * defragment there, so if anything is error, we will not touch
3471 * the real block.
3472 */
3473 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
3474 if (!bucket_buf) {
3475 ret = -EIO;
3476 goto out;
3477 }
3478
3479 buf = bucket_buf;
1c32a2fd
TM		 3480 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3481 memcpy(buf, bucket_block(bucket, i), blocksize);
01225596 3482
1c32a2fd 3483 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
161d6f30
JB		 3484 OCFS2_JOURNAL_ACCESS_WRITE);
3485 if (ret < 0) {
3486 mlog_errno(ret);
85db90e7 3487 goto out;
01225596
TM		 3488 }
3489
3490 xh = (struct ocfs2_xattr_header *)bucket_buf;
3491 entries = (char *)xh->xh_entries;
3492 xh_free_start = le16_to_cpu(xh->xh_free_start);
3493
3494 mlog(0, "adjust xattr bucket in %llu, count = %u, "
3495 "xh_free_start = %u, xh_name_value_len = %u.\n",
de29c085
MF		 3496 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
3497 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
01225596
TM		 3498
3499 /*
3500 * sort all the entries by their offset.
3501 * the largest will be the first, so that we can
3502 * move them to the end one by one.
3503 */
3504 sort(entries, le16_to_cpu(xh->xh_count),
3505 sizeof(struct ocfs2_xattr_entry),
3506 cmp_xe_offset, swap_xe);
3507
3508 /* Move all name/values to the end of the bucket. */
3509 xe = xh->xh_entries;
3510 end = OCFS2_XATTR_BUCKET_SIZE;
3511 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
3512 offset = le16_to_cpu(xe->xe_name_offset);
3513 if (ocfs2_xattr_is_local(xe))
3514 value_len = OCFS2_XATTR_SIZE(
3515 le64_to_cpu(xe->xe_value_size));
3516 else
3517 value_len = OCFS2_XATTR_ROOT_SIZE;
3518 len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
3519
3520 /*
3521 * We must make sure that the name/value pair
3522 * exist in the same block. So adjust end to
3523 * the previous block end if needed.
3524 */
3525 if (((end - len) / blocksize !=
3526 (end - 1) / blocksize))
3527 end = end - end % blocksize;
3528
3529 if (end > offset + len) {
3530 memmove(bucket_buf + end - len,
3531 bucket_buf + offset, len);
3532 xe->xe_name_offset = cpu_to_le16(end - len);
3533 }
3534
3535 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
3536 "bucket %llu\n", (unsigned long long)blkno);
3537
3538 end -= len;
3539 }
3540
3541 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
3542 "bucket %llu\n", (unsigned long long)blkno);
3543
3544 if (xh_free_start == end)
85db90e7 3545 goto out;
01225596
TM		 3546
3547 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
3548 xh->xh_free_start = cpu_to_le16(end);
3549
3550 /* sort the entries by their name_hash. */
3551 sort(entries, le16_to_cpu(xh->xh_count),
3552 sizeof(struct ocfs2_xattr_entry),
3553 cmp_xe, swap_xe);
3554
3555 buf = bucket_buf;
1c32a2fd
TM		 3556 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3557 memcpy(bucket_block(bucket, i), buf, blocksize);
3558 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
01225596 3559
01225596 3560out:
01225596
TM		 3561 kfree(bucket_buf);
3562 return ret;
3563}
3564
3565/*
b5c03e74
JB		 3566 * prev_blkno points to the start of an existing extent. new_blkno
3567 * points to a newly allocated extent. Because we know each of our
3568 * clusters contains more than bucket, we can easily split one cluster
3569 * at a bucket boundary. So we take the last cluster of the existing
3570 * extent and split it down the middle. We move the last half of the
3571 * buckets in the last cluster of the existing extent over to the new
3572 * extent.
01225596 3573 *
b5c03e74
JB		 3574 * first_bh is the buffer at prev_blkno so we can update the existing
3575 * extent's bucket count. header_bh is the bucket were we were hoping
3576 * to insert our xattr. If the bucket move places the target in the new
3577 * extent, we'll update first_bh and header_bh after modifying the old
3578 * extent.
3579 *
3580 * first_hash will be set as the 1st xe's name_hash in the new extent.
01225596
TM		 3581 */
3582static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
3583 handle_t *handle,
41cb8148
JB		 3584 struct ocfs2_xattr_bucket *first,
3585 struct ocfs2_xattr_bucket *target,
01225596 3586 u64 new_blkno,
01225596
TM		 3587 u32 num_clusters,
3588 u32 *first_hash)
3589{
c58b6032 3590 int ret;
41cb8148
JB		 3591 struct super_block *sb = inode->i_sb;
3592 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
3593 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
b5c03e74 3594 int to_move = num_buckets / 2;
c58b6032 3595 u64 src_blkno;
41cb8148
JB		 3596 u64 last_cluster_blkno = bucket_blkno(first) +
3597 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
01225596 3598
41cb8148
JB		 3599 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
3600 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
01225596 3601
01225596 3602 mlog(0, "move half of xattrs in cluster %llu to %llu\n",
c58b6032 3603 (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno);
01225596 3604
41cb8148 3605 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
c58b6032
JB		 3606 last_cluster_blkno, new_blkno,
3607 to_move, first_hash);
01225596
TM		 3608 if (ret) {
3609 mlog_errno(ret);
3610 goto out;
3611 }
3612
c58b6032
JB		 3613 /* This is the first bucket that got moved */
3614 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
01225596 3615
b5c03e74 3616 /*
c58b6032 3617 * If the target bucket was part of the moved buckets, we need to
41cb8148 3618 * update first and target.
b5c03e74 3619 */
41cb8148 3620 if (bucket_blkno(target) >= src_blkno) {
b5c03e74
JB		 3621 /* Find the block for the new target bucket */
3622 src_blkno = new_blkno +
41cb8148
JB		 3623 (bucket_blkno(target) - src_blkno);
3624
3625 ocfs2_xattr_bucket_relse(first);
3626 ocfs2_xattr_bucket_relse(target);
01225596 3627
b5c03e74 3628 /*
c58b6032 3629 * These shouldn't fail - the buffers are in the
b5c03e74
JB		 3630 * journal from ocfs2_cp_xattr_bucket().
3631 */
41cb8148 3632 ret = ocfs2_read_xattr_bucket(first, new_blkno);
c58b6032
JB		 3633 if (ret) {
3634 mlog_errno(ret);
3635 goto out;
3636 }
41cb8148
JB		 3637 ret = ocfs2_read_xattr_bucket(target, src_blkno);
3638 if (ret)
b5c03e74 3639 mlog_errno(ret);
01225596 3640
01225596
TM		 3641 }
3642
01225596 3643out:
01225596
TM		 3644 return ret;
3645}
3646
01225596 3647/*
80bcaf34
TM		 3648 * Find the suitable pos when we divide a bucket into 2.
3649 * We have to make sure the xattrs with the same hash value exist
3650 * in the same bucket.
3651 *
3652 * If this ocfs2_xattr_header covers more than one hash value, find a
3653 * place where the hash value changes. Try to find the most even split.
3654 * The most common case is that all entries have different hash values,
3655 * and the first check we make will find a place to split.
3656 */
3657static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
3658{
3659 struct ocfs2_xattr_entry *entries = xh->xh_entries;
3660 int count = le16_to_cpu(xh->xh_count);
3661 int delta, middle = count / 2;
3662
3663 /*
3664 * We start at the middle. Each step gets farther away in both
3665 * directions. We therefore hit the change in hash value
3666 * nearest to the middle. Note that this loop does not execute for
3667 * count < 2.
3668 */
3669 for (delta = 0; delta < middle; delta++) {
3670 /* Let's check delta earlier than middle */
3671 if (cmp_xe(&entries[middle - delta - 1],
3672 &entries[middle - delta]))
3673 return middle - delta;
3674
3675 /* For even counts, don't walk off the end */
3676 if ((middle + delta + 1) == count)
3677 continue;
3678
3679 /* Now try delta past middle */
3680 if (cmp_xe(&entries[middle + delta],
3681 &entries[middle + delta + 1]))
3682 return middle + delta + 1;
3683 }
3684
3685 /* Every entry had the same hash */
3686 return count;
3687}
3688
3689/*
3690 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
01225596 3691 * first_hash will record the 1st hash of the new bucket.
80bcaf34
TM		 3692 *
3693 * Normally half of the xattrs will be moved. But we have to make
3694 * sure that the xattrs with the same hash value are stored in the
3695 * same bucket. If all the xattrs in this bucket have the same hash
3696 * value, the new bucket will be initialized as an empty one and the
3697 * first_hash will be initialized as (hash_value+1).
01225596 3698 */
80bcaf34
TM		 3699static int ocfs2_divide_xattr_bucket(struct inode *inode,
3700 handle_t *handle,
3701 u64 blk,
3702 u64 new_blk,
3703 u32 *first_hash,
3704 int new_bucket_head)
01225596
TM		 3705{
3706 int ret, i;
80bcaf34 3707 int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
ba937127 3708 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 3709 struct ocfs2_xattr_header *xh;
3710 struct ocfs2_xattr_entry *xe;
3711 int blocksize = inode->i_sb->s_blocksize;
3712
80bcaf34 3713 mlog(0, "move some of xattrs from bucket %llu to %llu\n",
de29c085 3714 (unsigned long long)blk, (unsigned long long)new_blk);
01225596 3715
ba937127
JB		 3716 s_bucket = ocfs2_xattr_bucket_new(inode);
3717 t_bucket = ocfs2_xattr_bucket_new(inode);
3718 if (!s_bucket || !t_bucket) {
3719 ret = -ENOMEM;
3720 mlog_errno(ret);
3721 goto out;
3722 }
01225596 3723
ba937127 3724 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
01225596
TM		 3725 if (ret) {
3726 mlog_errno(ret);
3727 goto out;
3728 }
3729
ba937127 3730 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
1224be02 3731 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 3732 if (ret) {
3733 mlog_errno(ret);
3734 goto out;
3735 }
3736
784b816a
JB		 3737 /*
3738 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
3739 * there's no need to read it.
3740 */
ba937127 3741 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk);
01225596
TM		 3742 if (ret) {
3743 mlog_errno(ret);
3744 goto out;
3745 }
3746
2b656c1d
JB		 3747 /*
3748 * Hey, if we're overwriting t_bucket, what difference does
3749 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
3750 * same part of ocfs2_cp_xattr_bucket().
3751 */
ba937127 3752 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 3753 new_bucket_head ?
3754 OCFS2_JOURNAL_ACCESS_CREATE :
3755 OCFS2_JOURNAL_ACCESS_WRITE);
3756 if (ret) {
3757 mlog_errno(ret);
3758 goto out;
01225596
TM		 3759 }
3760
ba937127 3761 xh = bucket_xh(s_bucket);
80bcaf34
TM		 3762 count = le16_to_cpu(xh->xh_count);
3763 start = ocfs2_xattr_find_divide_pos(xh);
3764
3765 if (start == count) {
3766 xe = &xh->xh_entries[start-1];
3767
3768 /*
3769 * initialized a new empty bucket here.
3770 * The hash value is set as one larger than
3771 * that of the last entry in the previous bucket.
3772 */
ba937127
JB		 3773 for (i = 0; i < t_bucket->bu_blocks; i++)
3774 memset(bucket_block(t_bucket, i), 0, blocksize);
80bcaf34 3775
ba937127 3776 xh = bucket_xh(t_bucket);
80bcaf34
TM		 3777 xh->xh_free_start = cpu_to_le16(blocksize);
3778 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
3779 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
3780
3781 goto set_num_buckets;
3782 }
3783
01225596 3784 /* copy the whole bucket to the new first. */
ba937127 3785 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
01225596
TM		 3786
3787 /* update the new bucket. */
ba937127 3788 xh = bucket_xh(t_bucket);
01225596
TM		 3789
3790 /*
3791 * Calculate the total name/value len and xh_free_start for
3792 * the old bucket first.
3793 */
3794 name_offset = OCFS2_XATTR_BUCKET_SIZE;
3795 name_value_len = 0;
3796 for (i = 0; i < start; i++) {
3797 xe = &xh->xh_entries[i];
3798 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3799 if (ocfs2_xattr_is_local(xe))
3800 xe_len +=
3801 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3802 else
3803 xe_len += OCFS2_XATTR_ROOT_SIZE;
3804 name_value_len += xe_len;
3805 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
3806 name_offset = le16_to_cpu(xe->xe_name_offset);
3807 }
3808
3809 /*
3810 * Now begin the modification to the new bucket.
3811 *
3812 * In the new bucket, We just move the xattr entry to the beginning
3813 * and don't touch the name/value. So there will be some holes in the
3814 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
3815 * called.
3816 */
3817 xe = &xh->xh_entries[start];
3818 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
3819 mlog(0, "mv xattr entry len %d from %d to %d\n", len,
ff1ec20e
MF		 3820 (int)((char *)xe - (char *)xh),
3821 (int)((char *)xh->xh_entries - (char *)xh));
01225596
TM		 3822 memmove((char *)xh->xh_entries, (char *)xe, len);
3823 xe = &xh->xh_entries[count - start];
3824 len = sizeof(struct ocfs2_xattr_entry) * start;
3825 memset((char *)xe, 0, len);
3826
3827 le16_add_cpu(&xh->xh_count, -start);
3828 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
3829
3830 /* Calculate xh_free_start for the new bucket. */
3831 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
3832 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3833 xe = &xh->xh_entries[i];
3834 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3835 if (ocfs2_xattr_is_local(xe))
3836 xe_len +=
3837 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3838 else
3839 xe_len += OCFS2_XATTR_ROOT_SIZE;
3840 if (le16_to_cpu(xe->xe_name_offset) <
3841 le16_to_cpu(xh->xh_free_start))
3842 xh->xh_free_start = xe->xe_name_offset;
3843 }
3844
80bcaf34 3845set_num_buckets:
01225596
TM		 3846 /* set xh->xh_num_buckets for the new xh. */
3847 if (new_bucket_head)
3848 xh->xh_num_buckets = cpu_to_le16(1);
3849 else
3850 xh->xh_num_buckets = 0;
3851
ba937127 3852 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 3853
3854 /* store the first_hash of the new bucket. */
3855 if (first_hash)
3856 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
3857
3858 /*
80bcaf34
TM		 3859 * Now only update the 1st block of the old bucket. If we
3860 * just added a new empty bucket, there is no need to modify
3861 * it.
01225596 3862 */
80bcaf34
TM		 3863 if (start == count)
3864 goto out;
3865
ba937127 3866 xh = bucket_xh(s_bucket);
01225596
TM		 3867 memset(&xh->xh_entries[start], 0,
3868 sizeof(struct ocfs2_xattr_entry) * (count - start));
3869 xh->xh_count = cpu_to_le16(start);
3870 xh->xh_free_start = cpu_to_le16(name_offset);
3871 xh->xh_name_value_len = cpu_to_le16(name_value_len);
3872
ba937127 3873 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
01225596
TM		 3874
3875out:
ba937127
JB		 3876 ocfs2_xattr_bucket_free(s_bucket);
3877 ocfs2_xattr_bucket_free(t_bucket);
01225596
TM		 3878
3879 return ret;
3880}
3881
3882/*
3883 * Copy xattr from one bucket to another bucket.
3884 *
3885 * The caller must make sure that the journal transaction
3886 * has enough space for journaling.
3887 */
3888static int ocfs2_cp_xattr_bucket(struct inode *inode,
3889 handle_t *handle,
3890 u64 s_blkno,
3891 u64 t_blkno,
3892 int t_is_new)
3893{
4980c6da 3894 int ret;
ba937127 3895 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 3896
3897 BUG_ON(s_blkno == t_blkno);
3898
3899 mlog(0, "cp bucket %llu to %llu, target is %d\n",
de29c085
MF		 3900 (unsigned long long)s_blkno, (unsigned long long)t_blkno,
3901 t_is_new);
01225596 3902
ba937127
JB		 3903 s_bucket = ocfs2_xattr_bucket_new(inode);
3904 t_bucket = ocfs2_xattr_bucket_new(inode);
3905 if (!s_bucket || !t_bucket) {
3906 ret = -ENOMEM;
3907 mlog_errno(ret);
3908 goto out;
3909 }
92de109a 3910
ba937127 3911 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
01225596
TM		 3912 if (ret)
3913 goto out;
3914
784b816a
JB		 3915 /*
3916 * Even if !t_is_new, we're overwriting t_bucket. Thus,
3917 * there's no need to read it.
3918 */
ba937127 3919 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno);
01225596
TM		 3920 if (ret)
3921 goto out;
3922
2b656c1d
JB		 3923 /*
3924 * Hey, if we're overwriting t_bucket, what difference does
3925 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
874d65af
JB		 3926 * cluster to fill, we came here from
3927 * ocfs2_mv_xattr_buckets(), and it is really new -
3928 * ACCESS_CREATE is required. But we also might have moved data
3929 * out of t_bucket before extending back into it.
3930 * ocfs2_add_new_xattr_bucket() can do this - its call to
3931 * ocfs2_add_new_xattr_cluster() may have created a new extent
2b656c1d
JB		 3932 * and copied out the end of the old extent. Then it re-extends
3933 * the old extent back to create space for new xattrs. That's
3934 * how we get here, and the bucket isn't really new.
3935 */
ba937127 3936 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 3937 t_is_new ?
3938 OCFS2_JOURNAL_ACCESS_CREATE :
3939 OCFS2_JOURNAL_ACCESS_WRITE);
3940 if (ret)
3941 goto out;
01225596 3942
ba937127
JB		 3943 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3944 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 3945
3946out:
ba937127
JB		 3947 ocfs2_xattr_bucket_free(t_bucket);
3948 ocfs2_xattr_bucket_free(s_bucket);
01225596
TM		 3949
3950 return ret;
3951}
3952
3953/*
874d65af
JB		 3954 * src_blk points to the start of an existing extent. last_blk points to
3955 * last cluster in that extent. to_blk points to a newly allocated
54ecb6b6
JB		 3956 * extent. We copy the buckets from the cluster at last_blk to the new
3957 * extent. If start_bucket is non-zero, we skip that many buckets before
3958 * we start copying. The new extent's xh_num_buckets gets set to the
3959 * number of buckets we copied. The old extent's xh_num_buckets shrinks
3960 * by the same amount.
01225596 3961 */
54ecb6b6
JB		 3962static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
3963 u64 src_blk, u64 last_blk, u64 to_blk,
3964 unsigned int start_bucket,
3965 u32 *first_hash)
01225596
TM		 3966{
3967 int i, ret, credits;
3968 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
15d60929 3969 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596 3970 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
15d60929 3971 struct ocfs2_xattr_bucket *old_first, *new_first;
01225596 3972
874d65af
JB		 3973 mlog(0, "mv xattrs from cluster %llu to %llu\n",
3974 (unsigned long long)last_blk, (unsigned long long)to_blk);
01225596 3975
54ecb6b6
JB		 3976 BUG_ON(start_bucket >= num_buckets);
3977 if (start_bucket) {
3978 num_buckets -= start_bucket;
3979 last_blk += (start_bucket * blks_per_bucket);
3980 }
3981
15d60929
JB		 3982 /* The first bucket of the original extent */
3983 old_first = ocfs2_xattr_bucket_new(inode);
3984 /* The first bucket of the new extent */
3985 new_first = ocfs2_xattr_bucket_new(inode);
3986 if (!old_first || !new_first) {
3987 ret = -ENOMEM;
3988 mlog_errno(ret);
3989 goto out;
3990 }
3991
874d65af 3992 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
15d60929
JB		 3993 if (ret) {
3994 mlog_errno(ret);
3995 goto out;
3996 }
3997
01225596 3998 /*
54ecb6b6
JB		 3999 * We need to update the first bucket of the old extent and all
4000 * the buckets going to the new extent.
01225596 4001 */
54ecb6b6
JB		 4002 credits = ((num_buckets + 1) * blks_per_bucket) +
4003 handle->h_buffer_credits;
01225596
TM		 4004 ret = ocfs2_extend_trans(handle, credits);
4005 if (ret) {
4006 mlog_errno(ret);
4007 goto out;
4008 }
4009
15d60929
JB		 4010 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4011 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4012 if (ret) {
4013 mlog_errno(ret);
4014 goto out;
4015 }
4016
4017 for (i = 0; i < num_buckets; i++) {
4018 ret = ocfs2_cp_xattr_bucket(inode, handle,
874d65af 4019 last_blk + (i * blks_per_bucket),
15d60929
JB		 4020 to_blk + (i * blks_per_bucket),
4021 1);
01225596
TM		 4022 if (ret) {
4023 mlog_errno(ret);
4024 goto out;
4025 }
01225596
TM		 4026 }
4027
15d60929
JB		 4028 /*
4029 * Get the new bucket ready before we dirty anything
4030 * (This actually shouldn't fail, because we already dirtied
4031 * it once in ocfs2_cp_xattr_bucket()).
4032 */
4033 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4034 if (ret) {
01225596
TM		 4035 mlog_errno(ret);
4036 goto out;
4037 }
15d60929
JB		 4038 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4039 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4040 if (ret) {
4041 mlog_errno(ret);
4042 goto out;
4043 }
4044
15d60929
JB		 4045 /* Now update the headers */
4046 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4047 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
01225596 4048
15d60929
JB		 4049 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4050 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
01225596
TM		 4051
4052 if (first_hash)
15d60929
JB		 4053 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4054
01225596 4055out:
15d60929
JB		 4056 ocfs2_xattr_bucket_free(new_first);
4057 ocfs2_xattr_bucket_free(old_first);
01225596
TM		 4058 return ret;
4059}
4060
4061/*
80bcaf34 4062 * Move some xattrs in this cluster to the new cluster.
01225596
TM		 4063 * This function should only be called when bucket size == cluster size.
4064 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4065 */
80bcaf34
TM		 4066static int ocfs2_divide_xattr_cluster(struct inode *inode,
4067 handle_t *handle,
4068 u64 prev_blk,
4069 u64 new_blk,
4070 u32 *first_hash)
01225596
TM		 4071{
4072 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
85db90e7 4073 int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits;
01225596
TM		 4074
4075 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4076
4077 ret = ocfs2_extend_trans(handle, credits);
4078 if (ret) {
4079 mlog_errno(ret);
4080 return ret;
4081 }
4082
4083 /* Move half of the xattr in start_blk to the next bucket. */
80bcaf34
TM		 4084 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4085 new_blk, first_hash, 1);
01225596
TM		 4086}
4087
4088/*
4089 * Move some xattrs from the old cluster to the new one since they are not
4090 * contiguous in ocfs2 xattr tree.
4091 *
4092 * new_blk starts a new separate cluster, and we will move some xattrs from
4093 * prev_blk to it. v_start will be set as the first name hash value in this
4094 * new cluster so that it can be used as e_cpos during tree insertion and
4095 * don't collide with our original b-tree operations. first_bh and header_bh
4096 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
4097 * to extend the insert bucket.
4098 *
4099 * The problem is how much xattr should we move to the new one and when should
4100 * we update first_bh and header_bh?
4101 * 1. If cluster size > bucket size, that means the previous cluster has more
4102 * than 1 bucket, so just move half nums of bucket into the new cluster and
4103 * update the first_bh and header_bh if the insert bucket has been moved
4104 * to the new cluster.
4105 * 2. If cluster_size == bucket_size:
4106 * a) If the previous extent rec has more than one cluster and the insert
4107 * place isn't in the last cluster, copy the entire last cluster to the
4108 * new one. This time, we don't need to upate the first_bh and header_bh
4109 * since they will not be moved into the new cluster.
4110 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
4111 * the new one. And we set the extend flag to zero if the insert place is
4112 * moved into the new allocated cluster since no extend is needed.
4113 */
4114static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
4115 handle_t *handle,
012ee910
JB		 4116 struct ocfs2_xattr_bucket *first,
4117 struct ocfs2_xattr_bucket *target,
01225596 4118 u64 new_blk,
01225596
TM		 4119 u32 prev_clusters,
4120 u32 *v_start,
4121 int *extend)
4122{
92cf3adf 4123 int ret;
01225596
TM		 4124
4125 mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
012ee910 4126 (unsigned long long)bucket_blkno(first), prev_clusters,
de29c085 4127 (unsigned long long)new_blk);
01225596 4128
41cb8148 4129 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
01225596
TM		 4130 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
4131 handle,
41cb8148 4132 first, target,
01225596 4133 new_blk,
01225596
TM		 4134 prev_clusters,
4135 v_start);
012ee910 4136 if (ret)
41cb8148 4137 mlog_errno(ret);
41cb8148 4138 } else {
92cf3adf
JB		 4139 /* The start of the last cluster in the first extent */
4140 u64 last_blk = bucket_blkno(first) +
4141 ((prev_clusters - 1) *
4142 ocfs2_clusters_to_blocks(inode->i_sb, 1));
01225596 4143
012ee910 4144 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
874d65af 4145 ret = ocfs2_mv_xattr_buckets(inode, handle,
92cf3adf 4146 bucket_blkno(first),
54ecb6b6 4147 last_blk, new_blk, 0,
01225596 4148 v_start);
012ee910
JB		 4149 if (ret)
4150 mlog_errno(ret);
4151 } else {
80bcaf34
TM		 4152 ret = ocfs2_divide_xattr_cluster(inode, handle,
4153 last_blk, new_blk,
4154 v_start);
012ee910
JB		 4155 if (ret)
4156 mlog_errno(ret);
01225596 4157
92cf3adf 4158 if ((bucket_blkno(target) == last_blk) && extend)
01225596
TM		 4159 *extend = 0;
4160 }
4161 }
4162
4163 return ret;
4164}
4165
4166/*
4167 * Add a new cluster for xattr storage.
4168 *
4169 * If the new cluster is contiguous with the previous one, it will be
4170 * appended to the same extent record, and num_clusters will be updated.
4171 * If not, we will insert a new extent for it and move some xattrs in
4172 * the last cluster into the new allocated one.
4173 * We also need to limit the maximum size of a btree leaf, otherwise we'll
4174 * lose the benefits of hashing because we'll have to search large leaves.
4175 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
4176 * if it's bigger).
4177 *
4178 * first_bh is the first block of the previous extent rec and header_bh
4179 * indicates the bucket we will insert the new xattrs. They will be updated
4180 * when the header_bh is moved into the new cluster.
4181 */
4182static int ocfs2_add_new_xattr_cluster(struct inode *inode,
4183 struct buffer_head *root_bh,
ed29c0ca
JB		 4184 struct ocfs2_xattr_bucket *first,
4185 struct ocfs2_xattr_bucket *target,
01225596
TM		 4186 u32 *num_clusters,
4187 u32 prev_cpos,
78f30c31
TM		 4188 int *extend,
4189 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4190{
85db90e7 4191 int ret;
01225596
TM		 4192 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
4193 u32 prev_clusters = *num_clusters;
4194 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
4195 u64 block;
85db90e7 4196 handle_t *handle = ctxt->handle;
01225596 4197 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
f99b9b7c 4198 struct ocfs2_extent_tree et;
01225596
TM		 4199
4200 mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
4201 "previous xattr blkno = %llu\n",
4202 (unsigned long long)OCFS2_I(inode)->ip_blkno,
ed29c0ca 4203 prev_cpos, (unsigned long long)bucket_blkno(first));
01225596 4204
8d6220d6 4205 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
f99b9b7c 4206
01225596
TM		 4207 ret = ocfs2_journal_access(handle, inode, root_bh,
4208 OCFS2_JOURNAL_ACCESS_WRITE);
4209 if (ret < 0) {
4210 mlog_errno(ret);
4211 goto leave;
4212 }
4213
78f30c31 4214 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
01225596
TM		 4215 clusters_to_add, &bit_off, &num_bits);
4216 if (ret < 0) {
4217 if (ret != -ENOSPC)
4218 mlog_errno(ret);
4219 goto leave;
4220 }
4221
4222 BUG_ON(num_bits > clusters_to_add);
4223
4224 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
4225 mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n",
4226 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
4227
ed29c0ca 4228 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
01225596
TM		 4229 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
4230 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
4231 /*
4232 * If this cluster is contiguous with the old one and
4233 * adding this new cluster, we don't surpass the limit of
4234 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
4235 * initialized and used like other buckets in the previous
4236 * cluster.
4237 * So add it as a contiguous one. The caller will handle
4238 * its init process.
4239 */
4240 v_start = prev_cpos + prev_clusters;
4241 *num_clusters = prev_clusters + num_bits;
4242 mlog(0, "Add contiguous %u clusters to previous extent rec.\n",
4243 num_bits);
4244 } else {
4245 ret = ocfs2_adjust_xattr_cross_cluster(inode,
4246 handle,
012ee910
JB		 4247 first,
4248 target,
01225596 4249 block,
01225596
TM		 4250 prev_clusters,
4251 &v_start,
4252 extend);
4253 if (ret) {
4254 mlog_errno(ret);
4255 goto leave;
4256 }
4257 }
4258
4259 mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
de29c085 4260 num_bits, (unsigned long long)block, v_start);
f99b9b7c 4261 ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
78f30c31 4262 num_bits, 0, ctxt->meta_ac);
01225596
TM		 4263 if (ret < 0) {
4264 mlog_errno(ret);
4265 goto leave;
4266 }
4267
4268 ret = ocfs2_journal_dirty(handle, root_bh);
85db90e7 4269 if (ret < 0)
01225596 4270 mlog_errno(ret);
01225596
TM		 4271
4272leave:
01225596
TM		 4273 return ret;
4274}
4275
4276/*
92de109a
JB		 4277 * We are given an extent. 'first' is the bucket at the very front of
4278 * the extent. The extent has space for an additional bucket past
4279 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
4280 * of the target bucket. We wish to shift every bucket past the target
4281 * down one, filling in that additional space. When we get back to the
4282 * target, we split the target between itself and the now-empty bucket
4283 * at target+1 (aka, target_blkno + blks_per_bucket).
01225596
TM		 4284 */
4285static int ocfs2_extend_xattr_bucket(struct inode *inode,
85db90e7 4286 handle_t *handle,
92de109a
JB		 4287 struct ocfs2_xattr_bucket *first,
4288 u64 target_blk,
01225596
TM		 4289 u32 num_clusters)
4290{
4291 int ret, credits;
4292 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4293 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
92de109a
JB		 4294 u64 end_blk;
4295 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
01225596
TM		 4296
4297 mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
92de109a
JB		 4298 "from %llu, len = %u\n", (unsigned long long)target_blk,
4299 (unsigned long long)bucket_blkno(first), num_clusters);
01225596 4300
92de109a
JB		 4301 /* The extent must have room for an additional bucket */
4302 BUG_ON(new_bucket >=
4303 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
01225596 4304
92de109a
JB		 4305 /* end_blk points to the last existing bucket */
4306 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
01225596
TM		 4307
4308 /*
92de109a
JB		 4309 * end_blk is the start of the last existing bucket.
4310 * Thus, (end_blk - target_blk) covers the target bucket and
4311 * every bucket after it up to, but not including, the last
4312 * existing bucket. Then we add the last existing bucket, the
4313 * new bucket, and the first bucket (3 * blk_per_bucket).
01225596 4314 */
92de109a 4315 credits = (end_blk - target_blk) + (3 * blk_per_bucket) +
85db90e7
TM		 4316 handle->h_buffer_credits;
4317 ret = ocfs2_extend_trans(handle, credits);
4318 if (ret) {
01225596
TM		 4319 mlog_errno(ret);
4320 goto out;
4321 }
4322
92de109a
JB		 4323 ret = ocfs2_xattr_bucket_journal_access(handle, first,
4324 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4325 if (ret) {
4326 mlog_errno(ret);
85db90e7 4327 goto out;
01225596
TM		 4328 }
4329
92de109a 4330 while (end_blk != target_blk) {
01225596
TM		 4331 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
4332 end_blk + blk_per_bucket, 0);
4333 if (ret)
85db90e7 4334 goto out;
01225596
TM		 4335 end_blk -= blk_per_bucket;
4336 }
4337
92de109a
JB		 4338 /* Move half of the xattr in target_blkno to the next bucket. */
4339 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
4340 target_blk + blk_per_bucket, NULL, 0);
01225596 4341
92de109a
JB		 4342 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
4343 ocfs2_xattr_bucket_journal_dirty(handle, first);
01225596 4344
01225596
TM		 4345out:
4346 return ret;
4347}
4348
4349/*
91f2033f
JB		 4350 * Add new xattr bucket in an extent record and adjust the buckets
4351 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
4352 * bucket we want to insert into.
01225596 4353 *
91f2033f
JB		 4354 * In the easy case, we will move all the buckets after target down by
4355 * one. Half of target's xattrs will be moved to the next bucket.
4356 *
4357 * If current cluster is full, we'll allocate a new one. This may not
4358 * be contiguous. The underlying calls will make sure that there is
4359 * space for the insert, shifting buckets around if necessary.
4360 * 'target' may be moved by those calls.
01225596
TM		 4361 */
4362static int ocfs2_add_new_xattr_bucket(struct inode *inode,
4363 struct buffer_head *xb_bh,
91f2033f 4364 struct ocfs2_xattr_bucket *target,
78f30c31 4365 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4366{
01225596
TM		 4367 struct ocfs2_xattr_block *xb =
4368 (struct ocfs2_xattr_block *)xb_bh->b_data;
4369 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
4370 struct ocfs2_extent_list *el = &xb_root->xt_list;
91f2033f
JB		 4371 u32 name_hash =
4372 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
ed29c0ca 4373 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
01225596
TM		 4374 int ret, num_buckets, extend = 1;
4375 u64 p_blkno;
4376 u32 e_cpos, num_clusters;
92de109a 4377 /* The bucket at the front of the extent */
91f2033f 4378 struct ocfs2_xattr_bucket *first;
01225596 4379
91f2033f
JB		 4380 mlog(0, "Add new xattr bucket starting from %llu\n",
4381 (unsigned long long)bucket_blkno(target));
01225596 4382
ed29c0ca 4383 /* The first bucket of the original extent */
92de109a 4384 first = ocfs2_xattr_bucket_new(inode);
91f2033f 4385 if (!first) {
92de109a
JB		 4386 ret = -ENOMEM;
4387 mlog_errno(ret);
4388 goto out;
4389 }
4390
01225596
TM		 4391 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
4392 &num_clusters, el);
4393 if (ret) {
4394 mlog_errno(ret);
4395 goto out;
4396 }
4397
ed29c0ca 4398 ret = ocfs2_read_xattr_bucket(first, p_blkno);
01225596
TM		 4399 if (ret) {
4400 mlog_errno(ret);
4401 goto out;
4402 }
4403
ed29c0ca
JB		 4404 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
4405 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
4406 /*
4407 * This can move first+target if the target bucket moves
4408 * to the new extent.
4409 */
01225596
TM		 4410 ret = ocfs2_add_new_xattr_cluster(inode,
4411 xb_bh,
ed29c0ca
JB		 4412 first,
4413 target,
01225596
TM		 4414 &num_clusters,
4415 e_cpos,
78f30c31
TM		 4416 &extend,
4417 ctxt);
01225596
TM		 4418 if (ret) {
4419 mlog_errno(ret);
4420 goto out;
4421 }
4422 }
4423
92de109a 4424 if (extend) {
01225596 4425 ret = ocfs2_extend_xattr_bucket(inode,
85db90e7 4426 ctxt->handle,
ed29c0ca
JB		 4427 first,
4428 bucket_blkno(target),
01225596 4429 num_clusters);
92de109a
JB		 4430 if (ret)
4431 mlog_errno(ret);
4432 }
4433
01225596 4434out:
92de109a 4435 ocfs2_xattr_bucket_free(first);
ed29c0ca 4436
01225596
TM		 4437 return ret;
4438}
4439
4440static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
4441 struct ocfs2_xattr_bucket *bucket,
4442 int offs)
4443{
4444 int block_off = offs >> inode->i_sb->s_blocksize_bits;
4445
4446 offs = offs % inode->i_sb->s_blocksize;
51def39f 4447 return bucket_block(bucket, block_off) + offs;
01225596
TM		 4448}
4449
4450/*
4451 * Handle the normal xattr set, including replace, delete and new.
01225596
TM		 4452 *
4453 * Note: "local" indicates the real data's locality. So we can't
4454 * just its bucket locality by its length.
4455 */
4456static void ocfs2_xattr_set_entry_normal(struct inode *inode,
4457 struct ocfs2_xattr_info *xi,
4458 struct ocfs2_xattr_search *xs,
4459 u32 name_hash,
5a095611 4460 int local)
01225596
TM		 4461{
4462 struct ocfs2_xattr_entry *last, *xe;
4463 int name_len = strlen(xi->name);
4464 struct ocfs2_xattr_header *xh = xs->header;
4465 u16 count = le16_to_cpu(xh->xh_count), start;
4466 size_t blocksize = inode->i_sb->s_blocksize;
4467 char *val;
4468 size_t offs, size, new_size;
4469
4470 last = &xh->xh_entries[count];
4471 if (!xs->not_found) {
4472 xe = xs->here;
4473 offs = le16_to_cpu(xe->xe_name_offset);
4474 if (ocfs2_xattr_is_local(xe))
4475 size = OCFS2_XATTR_SIZE(name_len) +
4476 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
4477 else
4478 size = OCFS2_XATTR_SIZE(name_len) +
4479 OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
4480
4481 /*
4482 * If the new value will be stored outside, xi->value has been
4483 * initalized as an empty ocfs2_xattr_value_root, and the same
4484 * goes with xi->value_len, so we can set new_size safely here.
4485 * See ocfs2_xattr_set_in_bucket.
4486 */
4487 new_size = OCFS2_XATTR_SIZE(name_len) +
4488 OCFS2_XATTR_SIZE(xi->value_len);
4489
4490 le16_add_cpu(&xh->xh_name_value_len, -size);
4491 if (xi->value) {
4492 if (new_size > size)
4493 goto set_new_name_value;
4494
4495 /* Now replace the old value with new one. */
4496 if (local)
4497 xe->xe_value_size = cpu_to_le64(xi->value_len);
4498 else
4499 xe->xe_value_size = 0;
4500
4501 val = ocfs2_xattr_bucket_get_val(inode,
ba937127 4502 xs->bucket, offs);
01225596
TM		 4503 memset(val + OCFS2_XATTR_SIZE(name_len), 0,
4504 size - OCFS2_XATTR_SIZE(name_len));
4505 if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
4506 memcpy(val + OCFS2_XATTR_SIZE(name_len),
4507 xi->value, xi->value_len);
4508
4509 le16_add_cpu(&xh->xh_name_value_len, new_size);
4510 ocfs2_xattr_set_local(xe, local);
4511 return;
4512 } else {
5a095611
TM		 4513 /*
4514 * Remove the old entry if there is more than one.
4515 * We don't remove the last entry so that we can
4516 * use it to indicate the hash value of the empty
4517 * bucket.
4518 */
01225596 4519 last -= 1;
01225596 4520 le16_add_cpu(&xh->xh_count, -1);
5a095611
TM		 4521 if (xh->xh_count) {
4522 memmove(xe, xe + 1,
4523 (void *)last - (void *)xe);
4524 memset(last, 0,
4525 sizeof(struct ocfs2_xattr_entry));
4526 } else
4527 xh->xh_free_start =
4528 cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4529
01225596
TM		 4530 return;
4531 }
4532 } else {
4533 /* find a new entry for insert. */
4534 int low = 0, high = count - 1, tmp;
4535 struct ocfs2_xattr_entry *tmp_xe;
4536
5a095611 4537 while (low <= high && count) {
01225596
TM		 4538 tmp = (low + high) / 2;
4539 tmp_xe = &xh->xh_entries[tmp];
4540
4541 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
4542 low = tmp + 1;
4543 else if (name_hash <
4544 le32_to_cpu(tmp_xe->xe_name_hash))
4545 high = tmp - 1;
06b240d8
TM		 4546 else {
4547 low = tmp;
01225596 4548 break;
06b240d8 4549 }
01225596
TM		 4550 }
4551
4552 xe = &xh->xh_entries[low];
4553 if (low != count)
4554 memmove(xe + 1, xe, (void *)last - (void *)xe);
4555
4556 le16_add_cpu(&xh->xh_count, 1);
4557 memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
4558 xe->xe_name_hash = cpu_to_le32(name_hash);
4559 xe->xe_name_len = name_len;
4560 ocfs2_xattr_set_type(xe, xi->name_index);
4561 }
4562
4563set_new_name_value:
4564 /* Insert the new name+value. */
4565 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
4566
4567 /*
4568 * We must make sure that the name/value pair
4569 * exists in the same block.
4570 */
4571 offs = le16_to_cpu(xh->xh_free_start);
4572 start = offs - size;
4573
4574 if (start >> inode->i_sb->s_blocksize_bits !=
4575 (offs - 1) >> inode->i_sb->s_blocksize_bits) {
4576 offs = offs - offs % blocksize;
4577 xh->xh_free_start = cpu_to_le16(offs);
4578 }
4579
ba937127 4580 val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
01225596
TM		 4581 xe->xe_name_offset = cpu_to_le16(offs - size);
4582
4583 memset(val, 0, size);
4584 memcpy(val, xi->name, name_len);
4585 memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
4586
4587 xe->xe_value_size = cpu_to_le64(xi->value_len);
4588 ocfs2_xattr_set_local(xe, local);
4589 xs->here = xe;
4590 le16_add_cpu(&xh->xh_free_start, -size);
4591 le16_add_cpu(&xh->xh_name_value_len, size);
4592
4593 return;
4594}
4595
01225596
TM		 4596/*
4597 * Set the xattr entry in the specified bucket.
4598 * The bucket is indicated by xs->bucket and it should have the enough
4599 * space for the xattr insertion.
4600 */
4601static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
85db90e7 4602 handle_t *handle,
01225596
TM		 4603 struct ocfs2_xattr_info *xi,
4604 struct ocfs2_xattr_search *xs,
4605 u32 name_hash,
5a095611 4606 int local)
01225596 4607{
1224be02 4608 int ret;
02dbf38d 4609 u64 blkno;
01225596 4610
ff1ec20e
MF		 4611 mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
4612 (unsigned long)xi->value_len, xi->name_index,
ba937127 4613 (unsigned long long)bucket_blkno(xs->bucket));
01225596 4614
ba937127 4615 if (!xs->bucket->bu_bhs[1]) {
02dbf38d
JB		 4616 blkno = bucket_blkno(xs->bucket);
4617 ocfs2_xattr_bucket_relse(xs->bucket);
4618 ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
01225596
TM		 4619 if (ret) {
4620 mlog_errno(ret);
4621 goto out;
4622 }
4623 }
4624
ba937127 4625 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
1224be02
JB		 4626 OCFS2_JOURNAL_ACCESS_WRITE);
4627 if (ret < 0) {
4628 mlog_errno(ret);
4629 goto out;
01225596
TM		 4630 }
4631
5a095611 4632 ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
ba937127 4633 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 4634
01225596 4635out:
01225596
TM		 4636 return ret;
4637}
4638
01225596
TM		 4639/*
4640 * Truncate the specified xe_off entry in xattr bucket.
4641 * bucket is indicated by header_bh and len is the new length.
4642 * Both the ocfs2_xattr_value_root and the entry will be updated here.
4643 *
4644 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
4645 */
4646static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
548b0f22 4647 struct ocfs2_xattr_bucket *bucket,
01225596 4648 int xe_off,
78f30c31
TM		 4649 int len,
4650 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4651{
4652 int ret, offset;
4653 u64 value_blk;
4654 struct buffer_head *value_bh = NULL;
4655 struct ocfs2_xattr_value_root *xv;
4656 struct ocfs2_xattr_entry *xe;
548b0f22 4657 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596
TM		 4658 size_t blocksize = inode->i_sb->s_blocksize;
4659
4660 xe = &xh->xh_entries[xe_off];
4661
4662 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
4663
4664 offset = le16_to_cpu(xe->xe_name_offset) +
4665 OCFS2_XATTR_SIZE(xe->xe_name_len);
4666
4667 value_blk = offset / blocksize;
4668
4669 /* We don't allow ocfs2_xattr_value to be stored in different block. */
4670 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
01225596 4671
548b0f22
JB		 4672 value_bh = bucket->bu_bhs[value_blk];
4673 BUG_ON(!value_bh);
01225596
TM		 4674
4675 xv = (struct ocfs2_xattr_value_root *)
4676 (value_bh->b_data + offset % blocksize);
4677
548b0f22
JB		 4678 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
4679 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4680 if (ret) {
4681 mlog_errno(ret);
4682 goto out;
4683 }
4684
548b0f22
JB		 4685 /*
4686 * From here on out we have to dirty the bucket. The generic
4687 * value calls only modify one of the bucket's bhs, but we need
4688 * to send the bucket at once. So if they error, they *could* have
4689 * modified something. We have to assume they did, and dirty
4690 * the whole bucket. This leaves us in a consistent state.
4691 */
4692 mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n",
4693 xe_off, (unsigned long long)bucket_blkno(bucket), len);
4694 ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt);
01225596
TM		 4695 if (ret) {
4696 mlog_errno(ret);
548b0f22 4697 goto out_dirty;
01225596
TM		 4698 }
4699
548b0f22
JB		 4700 xe->xe_value_size = cpu_to_le64(len);
4701
4702out_dirty:
4703 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
4704
01225596 4705out:
01225596
TM		 4706 return ret;
4707}
4708
4709static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
78f30c31
TM		 4710 struct ocfs2_xattr_search *xs,
4711 int len,
4712 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4713{
4714 int ret, offset;
4715 struct ocfs2_xattr_entry *xe = xs->here;
4716 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
4717
ba937127 4718 BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
01225596
TM		 4719
4720 offset = xe - xh->xh_entries;
548b0f22 4721 ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
78f30c31 4722 offset, len, ctxt);
01225596
TM		 4723 if (ret)
4724 mlog_errno(ret);
4725
4726 return ret;
4727}
4728
4729static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
85db90e7 4730 handle_t *handle,
01225596
TM		 4731 struct ocfs2_xattr_search *xs,
4732 char *val,
4733 int value_len)
4734{
4735 int offset;
4736 struct ocfs2_xattr_value_root *xv;
4737 struct ocfs2_xattr_entry *xe = xs->here;
4738
4739 BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
4740
4741 offset = le16_to_cpu(xe->xe_name_offset) +
4742 OCFS2_XATTR_SIZE(xe->xe_name_len);
4743
4744 xv = (struct ocfs2_xattr_value_root *)(xs->base + offset);
4745
85db90e7
TM		 4746 return __ocfs2_xattr_set_value_outside(inode, handle,
4747 xv, val, value_len);
01225596
TM		 4748}
4749
01225596
TM		 4750static int ocfs2_rm_xattr_cluster(struct inode *inode,
4751 struct buffer_head *root_bh,
4752 u64 blkno,
4753 u32 cpos,
4754 u32 len)
4755{
4756 int ret;
4757 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4758 struct inode *tl_inode = osb->osb_tl_inode;
4759 handle_t *handle;
4760 struct ocfs2_xattr_block *xb =
4761 (struct ocfs2_xattr_block *)root_bh->b_data;
01225596
TM		 4762 struct ocfs2_alloc_context *meta_ac = NULL;
4763 struct ocfs2_cached_dealloc_ctxt dealloc;
f99b9b7c
JB		 4764 struct ocfs2_extent_tree et;
4765
8d6220d6 4766 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
01225596
TM		 4767
4768 ocfs2_init_dealloc_ctxt(&dealloc);
4769
4770 mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n",
4771 cpos, len, (unsigned long long)blkno);
4772
4773 ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len);
4774
f99b9b7c 4775 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
01225596
TM		 4776 if (ret) {
4777 mlog_errno(ret);
4778 return ret;
4779 }
4780
4781 mutex_lock(&tl_inode->i_mutex);
4782
4783 if (ocfs2_truncate_log_needs_flush(osb)) {
4784 ret = __ocfs2_flush_truncate_log(osb);
4785 if (ret < 0) {
4786 mlog_errno(ret);
4787 goto out;
4788 }
4789 }
4790
a90714c1 4791 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
d3264799 4792 if (IS_ERR(handle)) {
01225596
TM		 4793 ret = -ENOMEM;
4794 mlog_errno(ret);
4795 goto out;
4796 }
4797
4798 ret = ocfs2_journal_access(handle, inode, root_bh,
4799 OCFS2_JOURNAL_ACCESS_WRITE);
4800 if (ret) {
4801 mlog_errno(ret);
4802 goto out_commit;
4803 }
4804
f99b9b7c
JB		 4805 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
4806 &dealloc);
01225596
TM		 4807 if (ret) {
4808 mlog_errno(ret);
4809 goto out_commit;
4810 }
4811
4812 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
4813
4814 ret = ocfs2_journal_dirty(handle, root_bh);
4815 if (ret) {
4816 mlog_errno(ret);
4817 goto out_commit;
4818 }
4819
4820 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
4821 if (ret)
4822 mlog_errno(ret);
4823
4824out_commit:
4825 ocfs2_commit_trans(osb, handle);
4826out:
4827 ocfs2_schedule_truncate_log_flush(osb, 1);
4828
4829 mutex_unlock(&tl_inode->i_mutex);
4830
4831 if (meta_ac)
4832 ocfs2_free_alloc_context(meta_ac);
4833
4834 ocfs2_run_deallocs(osb, &dealloc);
4835
4836 return ret;
4837}
4838
01225596 4839static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
85db90e7 4840 handle_t *handle,
01225596
TM		 4841 struct ocfs2_xattr_search *xs)
4842{
ba937127 4843 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
01225596
TM		 4844 struct ocfs2_xattr_entry *last = &xh->xh_entries[
4845 le16_to_cpu(xh->xh_count) - 1];
4846 int ret = 0;
4847
ba937127 4848 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
1224be02 4849 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4850 if (ret) {
4851 mlog_errno(ret);
85db90e7 4852 return;
01225596
TM		 4853 }
4854
4855 /* Remove the old entry. */
4856 memmove(xs->here, xs->here + 1,
4857 (void *)last - (void *)xs->here);
4858 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
4859 le16_add_cpu(&xh->xh_count, -1);
4860
ba937127 4861 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596
TM		 4862}
4863
4864/*
4865 * Set the xattr name/value in the bucket specified in xs.
4866 *
4867 * As the new value in xi may be stored in the bucket or in an outside cluster,
4868 * we divide the whole process into 3 steps:
4869 * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
4870 * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
4871 * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
4872 * 4. If the clusters for the new outside value can't be allocated, we need
4873 * to free the xattr we allocated in set.
4874 */
4875static int ocfs2_xattr_set_in_bucket(struct inode *inode,
4876 struct ocfs2_xattr_info *xi,
78f30c31
TM		 4877 struct ocfs2_xattr_search *xs,
4878 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4879{
5a095611 4880 int ret, local = 1;
01225596
TM		 4881 size_t value_len;
4882 char *val = (char *)xi->value;
4883 struct ocfs2_xattr_entry *xe = xs->here;
2057e5c6
TM		 4884 u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
4885 strlen(xi->name));
01225596
TM		 4886
4887 if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
4888 /*
4889 * We need to truncate the xattr storage first.
4890 *
4891 * If both the old and new value are stored to
4892 * outside block, we only need to truncate
4893 * the storage and then set the value outside.
4894 *
4895 * If the new value should be stored within block,
4896 * we should free all the outside block first and
4897 * the modification to the xattr block will be done
4898 * by following steps.
4899 */
4900 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
4901 value_len = xi->value_len;
4902 else
4903 value_len = 0;
4904
4905 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
78f30c31
TM		 4906 value_len,
4907 ctxt);
01225596
TM		 4908 if (ret)
4909 goto out;
4910
4911 if (value_len)
4912 goto set_value_outside;
4913 }
4914
4915 value_len = xi->value_len;
4916 /* So we have to handle the inside block change now. */
4917 if (value_len > OCFS2_XATTR_INLINE_SIZE) {
4918 /*
4919 * If the new value will be stored outside of block,
4920 * initalize a new empty value root and insert it first.
4921 */
4922 local = 0;
4923 xi->value = &def_xv;
4924 xi->value_len = OCFS2_XATTR_ROOT_SIZE;
4925 }
4926
85db90e7
TM		 4927 ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
4928 name_hash, local);
01225596
TM		 4929 if (ret) {
4930 mlog_errno(ret);
4931 goto out;
4932 }
4933
5a095611
TM		 4934 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
4935 goto out;
01225596 4936
5a095611
TM		 4937 /* allocate the space now for the outside block storage. */
4938 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
78f30c31 4939 value_len, ctxt);
5a095611
TM		 4940 if (ret) {
4941 mlog_errno(ret);
4942
4943 if (xs->not_found) {
4944 /*
4945 * We can't allocate enough clusters for outside
4946 * storage and we have allocated xattr already,
4947 * so need to remove it.
4948 */
85db90e7 4949 ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
01225596 4950 }
01225596
TM		 4951 goto out;
4952 }
4953
4954set_value_outside:
85db90e7
TM		 4955 ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
4956 xs, val, value_len);
01225596
TM		 4957out:
4958 return ret;
4959}
4960
80bcaf34
TM		 4961/*
4962 * check whether the xattr bucket is filled up with the same hash value.
4963 * If we want to insert the xattr with the same hash, return -ENOSPC.
4964 * If we want to insert a xattr with different hash value, go ahead
4965 * and ocfs2_divide_xattr_bucket will handle this.
4966 */
01225596 4967static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
80bcaf34
TM		 4968 struct ocfs2_xattr_bucket *bucket,
4969 const char *name)
01225596 4970{
3e632946 4971 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
80bcaf34
TM		 4972 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
4973
4974 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
4975 return 0;
01225596
TM		 4976
4977 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
4978 xh->xh_entries[0].xe_name_hash) {
4979 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
4980 "hash = %u\n",
9c7759aa 4981 (unsigned long long)bucket_blkno(bucket),
01225596
TM		 4982 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
4983 return -ENOSPC;
4984 }
4985
4986 return 0;
4987}
4988
4989static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
4990 struct ocfs2_xattr_info *xi,
78f30c31
TM		 4991 struct ocfs2_xattr_search *xs,
4992 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4993{
4994 struct ocfs2_xattr_header *xh;
4995 struct ocfs2_xattr_entry *xe;
4996 u16 count, header_size, xh_free_start;
6dde41d9 4997 int free, max_free, need, old;
01225596
TM		 4998 size_t value_size = 0, name_len = strlen(xi->name);
4999 size_t blocksize = inode->i_sb->s_blocksize;
5000 int ret, allocation = 0;
01225596
TM		 5001
5002 mlog_entry("Set xattr %s in xattr index block\n", xi->name);
5003
5004try_again:
5005 xh = xs->header;
5006 count = le16_to_cpu(xh->xh_count);
5007 xh_free_start = le16_to_cpu(xh->xh_free_start);
5008 header_size = sizeof(struct ocfs2_xattr_header) +
5009 count * sizeof(struct ocfs2_xattr_entry);
5010 max_free = OCFS2_XATTR_BUCKET_SIZE -
5011 le16_to_cpu(xh->xh_name_value_len) - header_size;
5012
5013 mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
5014 "of %u which exceed block size\n",
ba937127 5015 (unsigned long long)bucket_blkno(xs->bucket),
01225596
TM		 5016 header_size);
5017
5018 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
5019 value_size = OCFS2_XATTR_ROOT_SIZE;
5020 else if (xi->value)
5021 value_size = OCFS2_XATTR_SIZE(xi->value_len);
5022
5023 if (xs->not_found)
5024 need = sizeof(struct ocfs2_xattr_entry) +
5025 OCFS2_XATTR_SIZE(name_len) + value_size;
5026 else {
5027 need = value_size + OCFS2_XATTR_SIZE(name_len);
5028
5029 /*
5030 * We only replace the old value if the new length is smaller
5031 * than the old one. Otherwise we will allocate new space in the
5032 * bucket to store it.
5033 */
5034 xe = xs->here;
5035 if (ocfs2_xattr_is_local(xe))
5036 old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
5037 else
5038 old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
5039
5040 if (old >= value_size)
5041 need = 0;
5042 }
5043
5044 free = xh_free_start - header_size;
5045 /*
5046 * We need to make sure the new name/value pair
5047 * can exist in the same block.
5048 */
5049 if (xh_free_start % blocksize < need)
5050 free -= xh_free_start % blocksize;
5051
5052 mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
5053 "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
5054 " %u\n", xs->not_found,
ba937127 5055 (unsigned long long)bucket_blkno(xs->bucket),
01225596
TM		 5056 free, need, max_free, le16_to_cpu(xh->xh_free_start),
5057 le16_to_cpu(xh->xh_name_value_len));
5058
976331d8
TM		 5059 if (free < need ||
5060 (xs->not_found &&
5061 count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
01225596
TM		 5062 if (need <= max_free &&
5063 count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
5064 /*
5065 * We can create the space by defragment. Since only the
5066 * name/value will be moved, the xe shouldn't be changed
5067 * in xs.
5068 */
85db90e7
TM		 5069 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5070 xs->bucket);
01225596
TM		 5071 if (ret) {
5072 mlog_errno(ret);
5073 goto out;
5074 }
5075
5076 xh_free_start = le16_to_cpu(xh->xh_free_start);
5077 free = xh_free_start - header_size;
5078 if (xh_free_start % blocksize < need)
5079 free -= xh_free_start % blocksize;
5080
5081 if (free >= need)
5082 goto xattr_set;
5083
5084 mlog(0, "Can't get enough space for xattr insert by "
5085 "defragment. Need %u bytes, but we have %d, so "
5086 "allocate new bucket for it.\n", need, free);
5087 }
5088
5089 /*
5090 * We have to add new buckets or clusters and one
5091 * allocation should leave us enough space for insert.
5092 */
5093 BUG_ON(allocation);
5094
5095 /*
5096 * We do not allow for overlapping ranges between buckets. And
5097 * the maximum number of collisions we will allow for then is
5098 * one bucket's worth, so check it here whether we need to
5099 * add a new bucket for the insert.
5100 */
80bcaf34 5101 ret = ocfs2_check_xattr_bucket_collision(inode,
ba937127 5102 xs->bucket,
80bcaf34 5103 xi->name);
01225596
TM		 5104 if (ret) {
5105 mlog_errno(ret);
5106 goto out;
5107 }
5108
5109 ret = ocfs2_add_new_xattr_bucket(inode,
5110 xs->xattr_bh,
91f2033f 5111 xs->bucket,
78f30c31 5112 ctxt);
01225596
TM		 5113 if (ret) {
5114 mlog_errno(ret);
5115 goto out;
5116 }
5117
91f2033f
JB		 5118 /*
5119 * ocfs2_add_new_xattr_bucket() will have updated
5120 * xs->bucket if it moved, but it will not have updated
5121 * any of the other search fields. Thus, we drop it and
5122 * re-search. Everything should be cached, so it'll be
5123 * quick.
5124 */
ba937127 5125 ocfs2_xattr_bucket_relse(xs->bucket);
01225596
TM		 5126 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5127 xi->name_index,
5128 xi->name, xs);
5129 if (ret && ret != -ENODATA)
5130 goto out;
5131 xs->not_found = ret;
5132 allocation = 1;
5133 goto try_again;
5134 }
5135
5136xattr_set:
78f30c31 5137 ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
01225596
TM		 5138out:
5139 mlog_exit(ret);
5140 return ret;
5141}
a3944256
TM		 5142
5143static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5144 struct ocfs2_xattr_bucket *bucket,
5145 void *para)
5146{
5147 int ret = 0;
3e632946 5148 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
a3944256
TM		 5149 u16 i;
5150 struct ocfs2_xattr_entry *xe;
78f30c31
TM		 5151 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5152 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
548b0f22
JB		 5153 int credits = ocfs2_remove_extent_credits(osb->sb) +
5154 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
5155
78f30c31
TM		 5156
5157 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
a3944256
TM		 5158
5159 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5160 xe = &xh->xh_entries[i];
5161 if (ocfs2_xattr_is_local(xe))
5162 continue;
5163
88c3b062
TM		 5164 ctxt.handle = ocfs2_start_trans(osb, credits);
5165 if (IS_ERR(ctxt.handle)) {
5166 ret = PTR_ERR(ctxt.handle);
5167 mlog_errno(ret);
5168 break;
5169 }
5170
548b0f22 5171 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
78f30c31 5172 i, 0, &ctxt);
88c3b062
TM		 5173
5174 ocfs2_commit_trans(osb, ctxt.handle);
a3944256
TM		 5175 if (ret) {
5176 mlog_errno(ret);
5177 break;
5178 }
5179 }
5180
78f30c31
TM		 5181 ocfs2_schedule_truncate_log_flush(osb, 1);
5182 ocfs2_run_deallocs(osb, &ctxt.dealloc);
a3944256
TM		 5183 return ret;
5184}
5185
5186static int ocfs2_delete_xattr_index_block(struct inode *inode,
5187 struct buffer_head *xb_bh)
5188{
5189 struct ocfs2_xattr_block *xb =
5190 (struct ocfs2_xattr_block *)xb_bh->b_data;
5191 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
5192 int ret = 0;
5193 u32 name_hash = UINT_MAX, e_cpos, num_clusters;
5194 u64 p_blkno;
5195
5196 if (le16_to_cpu(el->l_next_free_rec) == 0)
5197 return 0;
5198
5199 while (name_hash > 0) {
5200 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
5201 &e_cpos, &num_clusters, el);
5202 if (ret) {
5203 mlog_errno(ret);
5204 goto out;
5205 }
5206
5207 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
5208 ocfs2_delete_xattr_in_bucket,
5209 NULL);
5210 if (ret) {
5211 mlog_errno(ret);
5212 goto out;
5213 }
5214
5215 ret = ocfs2_rm_xattr_cluster(inode, xb_bh,
5216 p_blkno, e_cpos, num_clusters);
5217 if (ret) {
5218 mlog_errno(ret);
5219 break;
5220 }
5221
5222 if (e_cpos == 0)
5223 break;
5224
5225 name_hash = e_cpos - 1;
5226 }
5227
5228out:
5229 return ret;
5230}
99219aea 5231
923f7f31
TY		 5232/*
5233 * 'security' attributes support
5234 */
5235static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
5236 size_t list_size, const char *name,
5237 size_t name_len)
5238{
5239 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
5240 const size_t total_len = prefix_len + name_len + 1;
5241
5242 if (list && total_len <= list_size) {
5243 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
5244 memcpy(list + prefix_len, name, name_len);
5245 list[prefix_len + name_len] = '\0';
5246 }
5247 return total_len;
5248}
5249
5250static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
5251 void *buffer, size_t size)
5252{
5253 if (strcmp(name, "") == 0)
5254 return -EINVAL;
5255 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
5256 buffer, size);
5257}
5258
5259static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
5260 const void *value, size_t size, int flags)
5261{
5262 if (strcmp(name, "") == 0)
5263 return -EINVAL;
5264
5265 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
5266 size, flags);
5267}
5268
534eaddd
TY		 5269int ocfs2_init_security_get(struct inode *inode,
5270 struct inode *dir,
5271 struct ocfs2_security_xattr_info *si)
5272{
5273 return security_inode_init_security(inode, dir, &si->name, &si->value,
5274 &si->value_len);
5275}
5276
5277int ocfs2_init_security_set(handle_t *handle,
5278 struct inode *inode,
5279 struct buffer_head *di_bh,
5280 struct ocfs2_security_xattr_info *si,
5281 struct ocfs2_alloc_context *xattr_ac,
5282 struct ocfs2_alloc_context *data_ac)
5283{
5284 return ocfs2_xattr_set_handle(handle, inode, di_bh,
5285 OCFS2_XATTR_INDEX_SECURITY,
5286 si->name, si->value, si->value_len, 0,
5287 xattr_ac, data_ac);
5288}
5289
923f7f31
TY		 5290struct xattr_handler ocfs2_xattr_security_handler = {
5291 .prefix = XATTR_SECURITY_PREFIX,
5292 .list = ocfs2_xattr_security_list,
5293 .get = ocfs2_xattr_security_get,
5294 .set = ocfs2_xattr_security_set,
5295};
5296
99219aea
MF		 5297/*
5298 * 'trusted' attributes support
5299 */
99219aea
MF		 5300static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
5301 size_t list_size, const char *name,
5302 size_t name_len)
5303{
ceb1eba3 5304 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
99219aea
MF		 5305 const size_t total_len = prefix_len + name_len + 1;
5306
5307 if (list && total_len <= list_size) {
5308 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
5309 memcpy(list + prefix_len, name, name_len);
5310 list[prefix_len + name_len] = '\0';
5311 }
5312 return total_len;
5313}
5314
5315static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
5316 void *buffer, size_t size)
5317{
5318 if (strcmp(name, "") == 0)
5319 return -EINVAL;
5320 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
5321 buffer, size);
5322}
5323
5324static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
5325 const void *value, size_t size, int flags)
5326{
5327 if (strcmp(name, "") == 0)
5328 return -EINVAL;
5329
5330 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
5331 size, flags);
5332}
5333
5334struct xattr_handler ocfs2_xattr_trusted_handler = {
5335 .prefix = XATTR_TRUSTED_PREFIX,
5336 .list = ocfs2_xattr_trusted_list,
5337 .get = ocfs2_xattr_trusted_get,
5338 .set = ocfs2_xattr_trusted_set,
5339};
5340
99219aea
MF		 5341/*
5342 * 'user' attributes support
5343 */
99219aea
MF		 5344static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
5345 size_t list_size, const char *name,
5346 size_t name_len)
5347{
ceb1eba3 5348 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
99219aea
MF		 5349 const size_t total_len = prefix_len + name_len + 1;
5350 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5351
5352 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5353 return 0;
5354
5355 if (list && total_len <= list_size) {
5356 memcpy(list, XATTR_USER_PREFIX, prefix_len);
5357 memcpy(list + prefix_len, name, name_len);
5358 list[prefix_len + name_len] = '\0';
5359 }
5360 return total_len;
5361}
5362
5363static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
5364 void *buffer, size_t size)
5365{
5366 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5367
5368 if (strcmp(name, "") == 0)
5369 return -EINVAL;
5370 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5371 return -EOPNOTSUPP;
5372 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
5373 buffer, size);
5374}
5375
5376static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
5377 const void *value, size_t size, int flags)
5378{
5379 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5380
5381 if (strcmp(name, "") == 0)
5382 return -EINVAL;
5383 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5384 return -EOPNOTSUPP;
5385
5386 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
5387 size, flags);
5388}
5389
5390struct xattr_handler ocfs2_xattr_user_handler = {
5391 .prefix = XATTR_USER_PREFIX,
5392 .list = ocfs2_xattr_user_list,
5393 .get = ocfs2_xattr_user_get,
5394 .set = ocfs2_xattr_user_set,
5395};
Linux kernel - Deliverables
This page took 0.344948 seconds and 5 git commands to generate.