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ocfs2: Use ocfs2_xattr_value_buf in ocfs2_xattr_set_entry().
[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,
b3e5d379 721 struct ocfs2_xattr_value_buf *vb,
78f30c31
TM		 722 int len,
723 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 724{
725 int ret;
726 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
b3e5d379 727 u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
f56654c4
TM		 728
729 if (new_clusters == old_clusters)
730 return 0;
731
732 if (new_clusters > old_clusters)
733 ret = ocfs2_xattr_extend_allocation(inode,
734 new_clusters - old_clusters,
b3e5d379 735 vb, ctxt);
f56654c4
TM		 736 else
737 ret = ocfs2_xattr_shrink_size(inode,
738 old_clusters, new_clusters,
b3e5d379 739 vb, ctxt);
f56654c4
TM		 740
741 return ret;
742}
cf1d6c76 743
936b8834
TM		 744static int ocfs2_xattr_list_entry(char *buffer, size_t size,
745 size_t *result, const char *prefix,
746 const char *name, int name_len)
747{
748 char *p = buffer + *result;
749 int prefix_len = strlen(prefix);
750 int total_len = prefix_len + name_len + 1;
751
752 *result += total_len;
753
754 /* we are just looking for how big our buffer needs to be */
755 if (!size)
756 return 0;
757
758 if (*result > size)
759 return -ERANGE;
760
761 memcpy(p, prefix, prefix_len);
762 memcpy(p + prefix_len, name, name_len);
763 p[prefix_len + name_len] = '\0';
764
765 return 0;
766}
767
cf1d6c76
TY		 768static int ocfs2_xattr_list_entries(struct inode *inode,
769 struct ocfs2_xattr_header *header,
770 char *buffer, size_t buffer_size)
771{
936b8834
TM		 772 size_t result = 0;
773 int i, type, ret;
774 const char *prefix, *name;
cf1d6c76
TY		 775
776 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
777 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
936b8834
TM		 778 type = ocfs2_xattr_get_type(entry);
779 prefix = ocfs2_xattr_prefix(type);
780
781 if (prefix) {
782 name = (const char *)header +
783 le16_to_cpu(entry->xe_name_offset);
784
785 ret = ocfs2_xattr_list_entry(buffer, buffer_size,
786 &result, prefix, name,
787 entry->xe_name_len);
788 if (ret)
789 return ret;
cf1d6c76
TY		 790 }
791 }
792
936b8834 793 return result;
cf1d6c76
TY		 794}
795
796static int ocfs2_xattr_ibody_list(struct inode *inode,
797 struct ocfs2_dinode *di,
798 char *buffer,
799 size_t buffer_size)
800{
801 struct ocfs2_xattr_header *header = NULL;
802 struct ocfs2_inode_info *oi = OCFS2_I(inode);
803 int ret = 0;
804
805 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
806 return ret;
807
808 header = (struct ocfs2_xattr_header *)
809 ((void *)di + inode->i_sb->s_blocksize -
810 le16_to_cpu(di->i_xattr_inline_size));
811
812 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
813
814 return ret;
815}
816
817static int ocfs2_xattr_block_list(struct inode *inode,
818 struct ocfs2_dinode *di,
819 char *buffer,
820 size_t buffer_size)
821{
822 struct buffer_head *blk_bh = NULL;
0c044f0b 823 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 824 int ret = 0;
825
826 if (!di->i_xattr_loc)
827 return ret;
828
4ae1d69b
JB		 829 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
830 &blk_bh);
cf1d6c76
TY		 831 if (ret < 0) {
832 mlog_errno(ret);
833 return ret;
834 }
cf1d6c76 835
0c044f0b 836 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
0c044f0b
TM		 837 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
838 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
839 ret = ocfs2_xattr_list_entries(inode, header,
840 buffer, buffer_size);
841 } else {
842 struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
843 ret = ocfs2_xattr_tree_list_index_block(inode, xt,
844 buffer, buffer_size);
845 }
4ae1d69b 846
cf1d6c76
TY		 847 brelse(blk_bh);
848
849 return ret;
850}
851
852ssize_t ocfs2_listxattr(struct dentry *dentry,
853 char *buffer,
854 size_t size)
855{
856 int ret = 0, i_ret = 0, b_ret = 0;
857 struct buffer_head *di_bh = NULL;
858 struct ocfs2_dinode *di = NULL;
859 struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
860
8154da3d
TY		 861 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
862 return -EOPNOTSUPP;
863
cf1d6c76
TY		 864 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
865 return ret;
866
867 ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
868 if (ret < 0) {
869 mlog_errno(ret);
870 return ret;
871 }
872
873 di = (struct ocfs2_dinode *)di_bh->b_data;
874
875 down_read(&oi->ip_xattr_sem);
876 i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
877 if (i_ret < 0)
878 b_ret = 0;
879 else {
880 if (buffer) {
881 buffer += i_ret;
882 size -= i_ret;
883 }
884 b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
885 buffer, size);
886 if (b_ret < 0)
887 i_ret = 0;
888 }
889 up_read(&oi->ip_xattr_sem);
890 ocfs2_inode_unlock(dentry->d_inode, 0);
891
892 brelse(di_bh);
893
894 return i_ret + b_ret;
895}
896
897static int ocfs2_xattr_find_entry(int name_index,
898 const char *name,
899 struct ocfs2_xattr_search *xs)
900{
901 struct ocfs2_xattr_entry *entry;
902 size_t name_len;
903 int i, cmp = 1;
904
905 if (name == NULL)
906 return -EINVAL;
907
908 name_len = strlen(name);
909 entry = xs->here;
910 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
911 cmp = name_index - ocfs2_xattr_get_type(entry);
912 if (!cmp)
913 cmp = name_len - entry->xe_name_len;
914 if (!cmp)
915 cmp = memcmp(name, (xs->base +
916 le16_to_cpu(entry->xe_name_offset)),
917 name_len);
918 if (cmp == 0)
919 break;
920 entry += 1;
921 }
922 xs->here = entry;
923
924 return cmp ? -ENODATA : 0;
925}
926
927static int ocfs2_xattr_get_value_outside(struct inode *inode,
589dc260 928 struct ocfs2_xattr_value_root *xv,
cf1d6c76
TY		 929 void *buffer,
930 size_t len)
931{
932 u32 cpos, p_cluster, num_clusters, bpc, clusters;
933 u64 blkno;
934 int i, ret = 0;
935 size_t cplen, blocksize;
936 struct buffer_head *bh = NULL;
cf1d6c76
TY		 937 struct ocfs2_extent_list *el;
938
cf1d6c76
TY		 939 el = &xv->xr_list;
940 clusters = le32_to_cpu(xv->xr_clusters);
941 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
942 blocksize = inode->i_sb->s_blocksize;
943
944 cpos = 0;
945 while (cpos < clusters) {
946 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
947 &num_clusters, el);
948 if (ret) {
949 mlog_errno(ret);
950 goto out;
951 }
952
953 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
954 /* Copy ocfs2_xattr_value */
955 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
970e4936 956 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
cf1d6c76
TY		 957 if (ret) {
958 mlog_errno(ret);
959 goto out;
960 }
961
962 cplen = len >= blocksize ? blocksize : len;
963 memcpy(buffer, bh->b_data, cplen);
964 len -= cplen;
965 buffer += cplen;
966
967 brelse(bh);
968 bh = NULL;
969 if (len == 0)
970 break;
971 }
972 cpos += num_clusters;
973 }
974out:
975 return ret;
976}
977
978static int ocfs2_xattr_ibody_get(struct inode *inode,
979 int name_index,
980 const char *name,
981 void *buffer,
982 size_t buffer_size,
983 struct ocfs2_xattr_search *xs)
984{
985 struct ocfs2_inode_info *oi = OCFS2_I(inode);
986 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
589dc260 987 struct ocfs2_xattr_value_root *xv;
cf1d6c76
TY		 988 size_t size;
989 int ret = 0;
990
991 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
992 return -ENODATA;
993
994 xs->end = (void *)di + inode->i_sb->s_blocksize;
995 xs->header = (struct ocfs2_xattr_header *)
996 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
997 xs->base = (void *)xs->header;
998 xs->here = xs->header->xh_entries;
999
1000 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1001 if (ret)
1002 return ret;
1003 size = le64_to_cpu(xs->here->xe_value_size);
1004 if (buffer) {
1005 if (size > buffer_size)
1006 return -ERANGE;
1007 if (ocfs2_xattr_is_local(xs->here)) {
1008 memcpy(buffer, (void *)xs->base +
1009 le16_to_cpu(xs->here->xe_name_offset) +
1010 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1011 } else {
589dc260
TM		 1012 xv = (struct ocfs2_xattr_value_root *)
1013 (xs->base + le16_to_cpu(
1014 xs->here->xe_name_offset) +
1015 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1016 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1017 buffer, size);
1018 if (ret < 0) {
1019 mlog_errno(ret);
1020 return ret;
1021 }
1022 }
1023 }
1024
1025 return size;
1026}
1027
1028static int ocfs2_xattr_block_get(struct inode *inode,
1029 int name_index,
1030 const char *name,
1031 void *buffer,
1032 size_t buffer_size,
1033 struct ocfs2_xattr_search *xs)
1034{
cf1d6c76 1035 struct ocfs2_xattr_block *xb;
589dc260 1036 struct ocfs2_xattr_value_root *xv;
cf1d6c76 1037 size_t size;
589dc260 1038 int ret = -ENODATA, name_offset, name_len, block_off, i;
cf1d6c76 1039
ba937127
JB		 1040 xs->bucket = ocfs2_xattr_bucket_new(inode);
1041 if (!xs->bucket) {
1042 ret = -ENOMEM;
1043 mlog_errno(ret);
1044 goto cleanup;
1045 }
589dc260 1046
54f443f4
JB		 1047 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1048 if (ret) {
cf1d6c76 1049 mlog_errno(ret);
cf1d6c76
TY		 1050 goto cleanup;
1051 }
1052
6c1e183e
TY		 1053 if (xs->not_found) {
1054 ret = -ENODATA;
1055 goto cleanup;
1056 }
1057
54f443f4 1058 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 1059 size = le64_to_cpu(xs->here->xe_value_size);
1060 if (buffer) {
1061 ret = -ERANGE;
1062 if (size > buffer_size)
1063 goto cleanup;
589dc260
TM		 1064
1065 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1066 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1067 i = xs->here - xs->header->xh_entries;
1068
1069 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
1070 ret = ocfs2_xattr_bucket_get_name_value(inode,
ba937127 1071 bucket_xh(xs->bucket),
589dc260
TM		 1072 i,
1073 &block_off,
1074 &name_offset);
ba937127 1075 xs->base = bucket_block(xs->bucket, block_off);
589dc260 1076 }
cf1d6c76
TY		 1077 if (ocfs2_xattr_is_local(xs->here)) {
1078 memcpy(buffer, (void *)xs->base +
589dc260 1079 name_offset + name_len, size);
cf1d6c76 1080 } else {
589dc260
TM		 1081 xv = (struct ocfs2_xattr_value_root *)
1082 (xs->base + name_offset + name_len);
1083 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1084 buffer, size);
1085 if (ret < 0) {
1086 mlog_errno(ret);
1087 goto cleanup;
1088 }
1089 }
1090 }
1091 ret = size;
1092cleanup:
ba937127 1093 ocfs2_xattr_bucket_free(xs->bucket);
cf1d6c76 1094
54f443f4
JB		 1095 brelse(xs->xattr_bh);
1096 xs->xattr_bh = NULL;
cf1d6c76
TY		 1097 return ret;
1098}
1099
4e3e9d02
TY		 1100int ocfs2_xattr_get_nolock(struct inode *inode,
1101 struct buffer_head *di_bh,
0030e001
TY		 1102 int name_index,
1103 const char *name,
1104 void *buffer,
1105 size_t buffer_size)
cf1d6c76
TY		 1106{
1107 int ret;
1108 struct ocfs2_dinode *di = NULL;
cf1d6c76
TY		 1109 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1110 struct ocfs2_xattr_search xis = {
1111 .not_found = -ENODATA,
1112 };
1113 struct ocfs2_xattr_search xbs = {
1114 .not_found = -ENODATA,
1115 };
1116
8154da3d
TY		 1117 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1118 return -EOPNOTSUPP;
1119
cf1d6c76
TY		 1120 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1121 ret = -ENODATA;
1122
cf1d6c76
TY		 1123 xis.inode_bh = xbs.inode_bh = di_bh;
1124 di = (struct ocfs2_dinode *)di_bh->b_data;
1125
1126 down_read(&oi->ip_xattr_sem);
1127 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1128 buffer_size, &xis);
6c1e183e 1129 if (ret == -ENODATA && di->i_xattr_loc)
cf1d6c76
TY		 1130 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1131 buffer_size, &xbs);
1132 up_read(&oi->ip_xattr_sem);
4e3e9d02
TY		 1133
1134 return ret;
1135}
1136
1137/* ocfs2_xattr_get()
1138 *
1139 * Copy an extended attribute into the buffer provided.
1140 * Buffer is NULL to compute the size of buffer required.
1141 */
1142static int ocfs2_xattr_get(struct inode *inode,
1143 int name_index,
1144 const char *name,
1145 void *buffer,
1146 size_t buffer_size)
1147{
1148 int ret;
1149 struct buffer_head *di_bh = NULL;
1150
1151 ret = ocfs2_inode_lock(inode, &di_bh, 0);
1152 if (ret < 0) {
1153 mlog_errno(ret);
1154 return ret;
1155 }
1156 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1157 name, buffer, buffer_size);
1158
cf1d6c76
TY		 1159 ocfs2_inode_unlock(inode, 0);
1160
1161 brelse(di_bh);
1162
1163 return ret;
1164}
1165
1166static int __ocfs2_xattr_set_value_outside(struct inode *inode,
85db90e7 1167 handle_t *handle,
cf1d6c76
TY		 1168 struct ocfs2_xattr_value_root *xv,
1169 const void *value,
1170 int value_len)
1171{
1172 int ret = 0, i, cp_len, credits;
1173 u16 blocksize = inode->i_sb->s_blocksize;
1174 u32 p_cluster, num_clusters;
1175 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1176 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1177 u64 blkno;
1178 struct buffer_head *bh = NULL;
cf1d6c76
TY		 1179
1180 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1181
85db90e7
TM		 1182 /*
1183 * In __ocfs2_xattr_set_value_outside has already been dirtied,
1184 * so we don't need to worry about whether ocfs2_extend_trans
1185 * will create a new transactio for us or not.
1186 */
cf1d6c76 1187 credits = clusters * bpc;
85db90e7
TM		 1188 ret = ocfs2_extend_trans(handle, credits);
1189 if (ret) {
cf1d6c76
TY		 1190 mlog_errno(ret);
1191 goto out;
1192 }
1193
1194 while (cpos < clusters) {
1195 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1196 &num_clusters, &xv->xr_list);
1197 if (ret) {
1198 mlog_errno(ret);
85db90e7 1199 goto out;
cf1d6c76
TY		 1200 }
1201
1202 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1203
1204 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
970e4936 1205 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
cf1d6c76
TY		 1206 if (ret) {
1207 mlog_errno(ret);
85db90e7 1208 goto out;
cf1d6c76
TY		 1209 }
1210
1211 ret = ocfs2_journal_access(handle,
1212 inode,
1213 bh,
1214 OCFS2_JOURNAL_ACCESS_WRITE);
1215 if (ret < 0) {
1216 mlog_errno(ret);
85db90e7 1217 goto out;
cf1d6c76
TY		 1218 }
1219
1220 cp_len = value_len > blocksize ? blocksize : value_len;
1221 memcpy(bh->b_data, value, cp_len);
1222 value_len -= cp_len;
1223 value += cp_len;
1224 if (cp_len < blocksize)
1225 memset(bh->b_data + cp_len, 0,
1226 blocksize - cp_len);
1227
1228 ret = ocfs2_journal_dirty(handle, bh);
1229 if (ret < 0) {
1230 mlog_errno(ret);
85db90e7 1231 goto out;
cf1d6c76
TY		 1232 }
1233 brelse(bh);
1234 bh = NULL;
1235
1236 /*
1237 * XXX: do we need to empty all the following
1238 * blocks in this cluster?
1239 */
1240 if (!value_len)
1241 break;
1242 }
1243 cpos += num_clusters;
1244 }
cf1d6c76
TY		 1245out:
1246 brelse(bh);
1247
1248 return ret;
1249}
1250
1251static int ocfs2_xattr_cleanup(struct inode *inode,
85db90e7 1252 handle_t *handle,
cf1d6c76
TY		 1253 struct ocfs2_xattr_info *xi,
1254 struct ocfs2_xattr_search *xs,
512620f4 1255 struct ocfs2_xattr_value_buf *vb,
cf1d6c76
TY		 1256 size_t offs)
1257{
cf1d6c76
TY		 1258 int ret = 0;
1259 size_t name_len = strlen(xi->name);
1260 void *val = xs->base + offs;
1261 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1262
512620f4
JB		 1263 ret = vb->vb_access(handle, inode, vb->vb_bh,
1264 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 1265 if (ret) {
1266 mlog_errno(ret);
85db90e7 1267 goto out;
cf1d6c76
TY		 1268 }
1269 /* Decrease xattr count */
1270 le16_add_cpu(&xs->header->xh_count, -1);
1271 /* Remove the xattr entry and tree root which has already be set*/
1272 memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry));
1273 memset(val, 0, size);
1274
512620f4 1275 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
cf1d6c76
TY		 1276 if (ret < 0)
1277 mlog_errno(ret);
cf1d6c76
TY		 1278out:
1279 return ret;
1280}
1281
1282static int ocfs2_xattr_update_entry(struct inode *inode,
85db90e7 1283 handle_t *handle,
cf1d6c76
TY		 1284 struct ocfs2_xattr_info *xi,
1285 struct ocfs2_xattr_search *xs,
0c748e95 1286 struct ocfs2_xattr_value_buf *vb,
cf1d6c76
TY		 1287 size_t offs)
1288{
85db90e7 1289 int ret;
cf1d6c76 1290
0c748e95
JB		 1291 ret = vb->vb_access(handle, inode, vb->vb_bh,
1292 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 1293 if (ret) {
1294 mlog_errno(ret);
85db90e7 1295 goto out;
cf1d6c76
TY		 1296 }
1297
1298 xs->here->xe_name_offset = cpu_to_le16(offs);
1299 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1300 if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE)
1301 ocfs2_xattr_set_local(xs->here, 1);
1302 else
1303 ocfs2_xattr_set_local(xs->here, 0);
1304 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1305
0c748e95 1306 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
cf1d6c76
TY		 1307 if (ret < 0)
1308 mlog_errno(ret);
cf1d6c76
TY		 1309out:
1310 return ret;
1311}
1312
1313/*
1314 * ocfs2_xattr_set_value_outside()
1315 *
1316 * Set large size value in B tree.
1317 */
1318static int ocfs2_xattr_set_value_outside(struct inode *inode,
1319 struct ocfs2_xattr_info *xi,
1320 struct ocfs2_xattr_search *xs,
78f30c31 1321 struct ocfs2_xattr_set_ctxt *ctxt,
512620f4 1322 struct ocfs2_xattr_value_buf *vb,
cf1d6c76
TY		 1323 size_t offs)
1324{
1325 size_t name_len = strlen(xi->name);
1326 void *val = xs->base + offs;
1327 struct ocfs2_xattr_value_root *xv = NULL;
1328 size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1329 int ret = 0;
1330
1331 memset(val, 0, size);
1332 memcpy(val, xi->name, name_len);
1333 xv = (struct ocfs2_xattr_value_root *)
1334 (val + OCFS2_XATTR_SIZE(name_len));
1335 xv->xr_clusters = 0;
1336 xv->xr_last_eb_blk = 0;
1337 xv->xr_list.l_tree_depth = 0;
1338 xv->xr_list.l_count = cpu_to_le16(1);
1339 xv->xr_list.l_next_free_rec = 0;
512620f4 1340 vb->vb_xv = xv;
cf1d6c76 1341
512620f4 1342 ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt);
cf1d6c76
TY		 1343 if (ret < 0) {
1344 mlog_errno(ret);
1345 return ret;
1346 }
512620f4 1347 ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs);
cf1d6c76
TY		 1348 if (ret < 0) {
1349 mlog_errno(ret);
1350 return ret;
1351 }
512620f4 1352 ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb->vb_xv,
85db90e7 1353 xi->value, xi->value_len);
cf1d6c76
TY		 1354 if (ret < 0)
1355 mlog_errno(ret);
1356
1357 return ret;
1358}
1359
1360/*
1361 * ocfs2_xattr_set_entry_local()
1362 *
1363 * Set, replace or remove extended attribute in local.
1364 */
1365static void ocfs2_xattr_set_entry_local(struct inode *inode,
1366 struct ocfs2_xattr_info *xi,
1367 struct ocfs2_xattr_search *xs,
1368 struct ocfs2_xattr_entry *last,
1369 size_t min_offs)
1370{
1371 size_t name_len = strlen(xi->name);
1372 int i;
1373
1374 if (xi->value && xs->not_found) {
1375 /* Insert the new xattr entry. */
1376 le16_add_cpu(&xs->header->xh_count, 1);
1377 ocfs2_xattr_set_type(last, xi->name_index);
1378 ocfs2_xattr_set_local(last, 1);
1379 last->xe_name_len = name_len;
1380 } else {
1381 void *first_val;
1382 void *val;
1383 size_t offs, size;
1384
1385 first_val = xs->base + min_offs;
1386 offs = le16_to_cpu(xs->here->xe_name_offset);
1387 val = xs->base + offs;
1388
1389 if (le64_to_cpu(xs->here->xe_value_size) >
1390 OCFS2_XATTR_INLINE_SIZE)
1391 size = OCFS2_XATTR_SIZE(name_len) +
1392 OCFS2_XATTR_ROOT_SIZE;
1393 else
1394 size = OCFS2_XATTR_SIZE(name_len) +
1395 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1396
1397 if (xi->value && size == OCFS2_XATTR_SIZE(name_len) +
1398 OCFS2_XATTR_SIZE(xi->value_len)) {
1399 /* The old and the new value have the
1400 same size. Just replace the value. */
1401 ocfs2_xattr_set_local(xs->here, 1);
1402 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1403 /* Clear value bytes. */
1404 memset(val + OCFS2_XATTR_SIZE(name_len),
1405 0,
1406 OCFS2_XATTR_SIZE(xi->value_len));
1407 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1408 xi->value,
1409 xi->value_len);
1410 return;
1411 }
1412 /* Remove the old name+value. */
1413 memmove(first_val + size, first_val, val - first_val);
1414 memset(first_val, 0, size);
1415 xs->here->xe_name_hash = 0;
1416 xs->here->xe_name_offset = 0;
1417 ocfs2_xattr_set_local(xs->here, 1);
1418 xs->here->xe_value_size = 0;
1419
1420 min_offs += size;
1421
1422 /* Adjust all value offsets. */
1423 last = xs->header->xh_entries;
1424 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1425 size_t o = le16_to_cpu(last->xe_name_offset);
1426
1427 if (o < offs)
1428 last->xe_name_offset = cpu_to_le16(o + size);
1429 last += 1;
1430 }
1431
1432 if (!xi->value) {
1433 /* Remove the old entry. */
1434 last -= 1;
1435 memmove(xs->here, xs->here + 1,
1436 (void *)last - (void *)xs->here);
1437 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
1438 le16_add_cpu(&xs->header->xh_count, -1);
1439 }
1440 }
1441 if (xi->value) {
1442 /* Insert the new name+value. */
1443 size_t size = OCFS2_XATTR_SIZE(name_len) +
1444 OCFS2_XATTR_SIZE(xi->value_len);
1445 void *val = xs->base + min_offs - size;
1446
1447 xs->here->xe_name_offset = cpu_to_le16(min_offs - size);
1448 memset(val, 0, size);
1449 memcpy(val, xi->name, name_len);
1450 memcpy(val + OCFS2_XATTR_SIZE(name_len),
1451 xi->value,
1452 xi->value_len);
1453 xs->here->xe_value_size = cpu_to_le64(xi->value_len);
1454 ocfs2_xattr_set_local(xs->here, 1);
1455 ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
1456 }
1457
1458 return;
1459}
1460
1461/*
1462 * ocfs2_xattr_set_entry()
1463 *
1464 * Set extended attribute entry into inode or block.
1465 *
1466 * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE,
1467 * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(),
1468 * then set value in B tree with set_value_outside().
1469 */
1470static int ocfs2_xattr_set_entry(struct inode *inode,
1471 struct ocfs2_xattr_info *xi,
1472 struct ocfs2_xattr_search *xs,
78f30c31 1473 struct ocfs2_xattr_set_ctxt *ctxt,
cf1d6c76
TY		 1474 int flag)
1475{
1476 struct ocfs2_xattr_entry *last;
1477 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1478 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1479 size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name);
1480 size_t size_l = 0;
85db90e7 1481 handle_t *handle = ctxt->handle;
cf1d6c76
TY		 1482 int free, i, ret;
1483 struct ocfs2_xattr_info xi_l = {
1484 .name_index = xi->name_index,
1485 .name = xi->name,
1486 .value = xi->value,
1487 .value_len = xi->value_len,
1488 };
512620f4
JB		 1489 struct ocfs2_xattr_value_buf vb = {
1490 .vb_bh = xs->xattr_bh,
1491 .vb_access = ocfs2_journal_access_di,
1492 };
1493
1494 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1495 BUG_ON(xs->xattr_bh == xs->inode_bh);
1496 vb.vb_access = ocfs2_journal_access_xb;
1497 } else
1498 BUG_ON(xs->xattr_bh != xs->inode_bh);
cf1d6c76
TY		 1499
1500 /* Compute min_offs, last and free space. */
1501 last = xs->header->xh_entries;
1502
1503 for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) {
1504 size_t offs = le16_to_cpu(last->xe_name_offset);
1505 if (offs < min_offs)
1506 min_offs = offs;
1507 last += 1;
1508 }
1509
1510 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
1511 if (free < 0)
b37c4d84 1512 return -EIO;
cf1d6c76
TY		 1513
1514 if (!xs->not_found) {
1515 size_t size = 0;
1516 if (ocfs2_xattr_is_local(xs->here))
1517 size = OCFS2_XATTR_SIZE(name_len) +
1518 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1519 else
1520 size = OCFS2_XATTR_SIZE(name_len) +
1521 OCFS2_XATTR_ROOT_SIZE;
1522 free += (size + sizeof(struct ocfs2_xattr_entry));
1523 }
1524 /* Check free space in inode or block */
1525 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1526 if (free < sizeof(struct ocfs2_xattr_entry) +
1527 OCFS2_XATTR_SIZE(name_len) +
1528 OCFS2_XATTR_ROOT_SIZE) {
1529 ret = -ENOSPC;
1530 goto out;
1531 }
1532 size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
1533 xi_l.value = (void *)&def_xv;
1534 xi_l.value_len = OCFS2_XATTR_ROOT_SIZE;
1535 } else if (xi->value) {
1536 if (free < sizeof(struct ocfs2_xattr_entry) +
1537 OCFS2_XATTR_SIZE(name_len) +
1538 OCFS2_XATTR_SIZE(xi->value_len)) {
1539 ret = -ENOSPC;
1540 goto out;
1541 }
1542 }
1543
1544 if (!xs->not_found) {
1545 /* For existing extended attribute */
1546 size_t size = OCFS2_XATTR_SIZE(name_len) +
1547 OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size));
1548 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
1549 void *val = xs->base + offs;
1550
1551 if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
1552 /* Replace existing local xattr with tree root */
1553 ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
512620f4 1554 ctxt, &vb, offs);
cf1d6c76
TY		 1555 if (ret < 0)
1556 mlog_errno(ret);
1557 goto out;
1558 } else if (!ocfs2_xattr_is_local(xs->here)) {
1559 /* For existing xattr which has value outside */
512620f4
JB		 1560 vb.vb_xv = (struct ocfs2_xattr_value_root *)
1561 (val + OCFS2_XATTR_SIZE(name_len));
cf1d6c76
TY		 1562
1563 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1564 /*
1565 * If new value need set outside also,
1566 * first truncate old value to new value,
1567 * then set new value with set_value_outside().
1568 */
1569 ret = ocfs2_xattr_value_truncate(inode,
b3e5d379 1570 &vb,
78f30c31
TM		 1571 xi->value_len,
1572 ctxt);
cf1d6c76
TY		 1573 if (ret < 0) {
1574 mlog_errno(ret);
1575 goto out;
1576 }
1577
85db90e7
TM		 1578 ret = ocfs2_xattr_update_entry(inode,
1579 handle,
1580 xi,
1581 xs,
0c748e95 1582 &vb,
85db90e7 1583 offs);
cf1d6c76
TY		 1584 if (ret < 0) {
1585 mlog_errno(ret);
1586 goto out;
1587 }
1588
85db90e7
TM		 1589 ret = __ocfs2_xattr_set_value_outside(inode,
1590 handle,
b3e5d379 1591 vb.vb_xv,
85db90e7
TM		 1592 xi->value,
1593 xi->value_len);
cf1d6c76
TY		 1594 if (ret < 0)
1595 mlog_errno(ret);
1596 goto out;
1597 } else {
1598 /*
1599 * If new value need set in local,
1600 * just trucate old value to zero.
1601 */
1602 ret = ocfs2_xattr_value_truncate(inode,
b3e5d379 1603 &vb,
85db90e7
TM		 1604 0,
1605 ctxt);
cf1d6c76
TY		 1606 if (ret < 0)
1607 mlog_errno(ret);
1608 }
1609 }
1610 }
1611
512620f4
JB		 1612 ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh,
1613 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 1614 if (ret) {
1615 mlog_errno(ret);
85db90e7 1616 goto out;
cf1d6c76
TY		 1617 }
1618
1619 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
512620f4
JB		 1620 ret = vb.vb_access(handle, inode, vb.vb_bh,
1621 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 1622 if (ret) {
1623 mlog_errno(ret);
85db90e7 1624 goto out;
cf1d6c76
TY		 1625 }
1626 }
1627
1628 /*
1629 * Set value in local, include set tree root in local.
1630 * This is the first step for value size >INLINE_SIZE.
1631 */
1632 ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
1633
1634 if (!(flag & OCFS2_INLINE_XATTR_FL)) {
1635 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
1636 if (ret < 0) {
1637 mlog_errno(ret);
85db90e7 1638 goto out;
cf1d6c76
TY		 1639 }
1640 }
1641
1642 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) &&
1643 (flag & OCFS2_INLINE_XATTR_FL)) {
1644 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1645 unsigned int xattrsize = osb->s_xattr_inline_size;
1646
1647 /*
1648 * Adjust extent record count or inline data size
1649 * to reserve space for extended attribute.
1650 */
1651 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1652 struct ocfs2_inline_data *idata = &di->id2.i_data;
1653 le16_add_cpu(&idata->id_count, -xattrsize);
1654 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
1655 struct ocfs2_extent_list *el = &di->id2.i_list;
1656 le16_add_cpu(&el->l_count, -(xattrsize /
1657 sizeof(struct ocfs2_extent_rec)));
1658 }
1659 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
1660 }
1661 /* Update xattr flag */
1662 spin_lock(&oi->ip_lock);
1663 oi->ip_dyn_features |= flag;
1664 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1665 spin_unlock(&oi->ip_lock);
1666 /* Update inode ctime */
1667 inode->i_ctime = CURRENT_TIME;
1668 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1669 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1670
1671 ret = ocfs2_journal_dirty(handle, xs->inode_bh);
1672 if (ret < 0)
1673 mlog_errno(ret);
1674
cf1d6c76
TY		 1675 if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1676 /*
1677 * Set value outside in B tree.
1678 * This is the second step for value size > INLINE_SIZE.
1679 */
1680 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
512620f4
JB		 1681 ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt,
1682 &vb, offs);
cf1d6c76
TY		 1683 if (ret < 0) {
1684 int ret2;
1685
1686 mlog_errno(ret);
1687 /*
1688 * If set value outside failed, we have to clean
1689 * the junk tree root we have already set in local.
1690 */
85db90e7 1691 ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
512620f4 1692 xi, xs, &vb, offs);
cf1d6c76
TY		 1693 if (ret2 < 0)
1694 mlog_errno(ret2);
1695 }
1696 }
1697out:
1698 return ret;
cf1d6c76
TY		 1699}
1700
cf1d6c76
TY		 1701static int ocfs2_remove_value_outside(struct inode*inode,
1702 struct buffer_head *bh,
1703 struct ocfs2_xattr_header *header)
1704{
1705 int ret = 0, i;
78f30c31
TM		 1706 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1707 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
1708
1709 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
cf1d6c76 1710
a90714c1
JK		 1711 ctxt.handle = ocfs2_start_trans(osb,
1712 ocfs2_remove_extent_credits(osb->sb));
85db90e7
TM		 1713 if (IS_ERR(ctxt.handle)) {
1714 ret = PTR_ERR(ctxt.handle);
1715 mlog_errno(ret);
1716 goto out;
1717 }
1718
cf1d6c76
TY		 1719 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
1720 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
1721
1722 if (!ocfs2_xattr_is_local(entry)) {
b3e5d379
JB		 1723 struct ocfs2_xattr_value_buf vb = {
1724 .vb_bh = bh,
1725 .vb_access = ocfs2_journal_access,
1726 };
cf1d6c76
TY		 1727 void *val;
1728
1729 val = (void *)header +
1730 le16_to_cpu(entry->xe_name_offset);
b3e5d379 1731 vb.vb_xv = (struct ocfs2_xattr_value_root *)
cf1d6c76 1732 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
b3e5d379 1733 ret = ocfs2_xattr_value_truncate(inode, &vb, 0, &ctxt);
cf1d6c76
TY		 1734 if (ret < 0) {
1735 mlog_errno(ret);
78f30c31 1736 break;
cf1d6c76
TY		 1737 }
1738 }
1739 }
1740
85db90e7 1741 ocfs2_commit_trans(osb, ctxt.handle);
78f30c31
TM		 1742 ocfs2_schedule_truncate_log_flush(osb, 1);
1743 ocfs2_run_deallocs(osb, &ctxt.dealloc);
85db90e7 1744out:
cf1d6c76
TY		 1745 return ret;
1746}
1747
1748static int ocfs2_xattr_ibody_remove(struct inode *inode,
1749 struct buffer_head *di_bh)
1750{
1751
1752 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1753 struct ocfs2_xattr_header *header;
1754 int ret;
1755
1756 header = (struct ocfs2_xattr_header *)
1757 ((void *)di + inode->i_sb->s_blocksize -
1758 le16_to_cpu(di->i_xattr_inline_size));
1759
1760 ret = ocfs2_remove_value_outside(inode, di_bh, header);
1761
1762 return ret;
1763}
1764
1765static int ocfs2_xattr_block_remove(struct inode *inode,
1766 struct buffer_head *blk_bh)
1767{
1768 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 1769 int ret = 0;
1770
1771 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
a3944256
TM		 1772 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1773 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
1774 ret = ocfs2_remove_value_outside(inode, blk_bh, header);
1775 } else
1776 ret = ocfs2_delete_xattr_index_block(inode, blk_bh);
cf1d6c76
TY		 1777
1778 return ret;
1779}
1780
08413899
TM		 1781static int ocfs2_xattr_free_block(struct inode *inode,
1782 u64 block)
1783{
1784 struct inode *xb_alloc_inode;
1785 struct buffer_head *xb_alloc_bh = NULL;
1786 struct buffer_head *blk_bh = NULL;
1787 struct ocfs2_xattr_block *xb;
1788 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1789 handle_t *handle;
1790 int ret = 0;
1791 u64 blk, bg_blkno;
1792 u16 bit;
1793
4ae1d69b 1794 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
08413899
TM		 1795 if (ret < 0) {
1796 mlog_errno(ret);
1797 goto out;
1798 }
1799
08413899
TM		 1800 ret = ocfs2_xattr_block_remove(inode, blk_bh);
1801 if (ret < 0) {
1802 mlog_errno(ret);
1803 goto out;
1804 }
1805
4ae1d69b 1806 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
08413899
TM		 1807 blk = le64_to_cpu(xb->xb_blkno);
1808 bit = le16_to_cpu(xb->xb_suballoc_bit);
1809 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
1810
1811 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
1812 EXTENT_ALLOC_SYSTEM_INODE,
1813 le16_to_cpu(xb->xb_suballoc_slot));
1814 if (!xb_alloc_inode) {
1815 ret = -ENOMEM;
1816 mlog_errno(ret);
1817 goto out;
1818 }
1819 mutex_lock(&xb_alloc_inode->i_mutex);
1820
1821 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
1822 if (ret < 0) {
1823 mlog_errno(ret);
1824 goto out_mutex;
1825 }
1826
1827 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
1828 if (IS_ERR(handle)) {
1829 ret = PTR_ERR(handle);
1830 mlog_errno(ret);
1831 goto out_unlock;
1832 }
1833
1834 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
1835 bit, bg_blkno, 1);
1836 if (ret < 0)
1837 mlog_errno(ret);
1838
1839 ocfs2_commit_trans(osb, handle);
1840out_unlock:
1841 ocfs2_inode_unlock(xb_alloc_inode, 1);
1842 brelse(xb_alloc_bh);
1843out_mutex:
1844 mutex_unlock(&xb_alloc_inode->i_mutex);
1845 iput(xb_alloc_inode);
1846out:
1847 brelse(blk_bh);
1848 return ret;
1849}
1850
cf1d6c76
TY		 1851/*
1852 * ocfs2_xattr_remove()
1853 *
1854 * Free extended attribute resources associated with this inode.
1855 */
1856int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
1857{
cf1d6c76
TY		 1858 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1859 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1860 handle_t *handle;
1861 int ret;
1862
8154da3d
TY		 1863 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1864 return 0;
1865
cf1d6c76
TY		 1866 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1867 return 0;
1868
1869 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1870 ret = ocfs2_xattr_ibody_remove(inode, di_bh);
1871 if (ret < 0) {
1872 mlog_errno(ret);
1873 goto out;
1874 }
1875 }
cf1d6c76 1876
08413899
TM		 1877 if (di->i_xattr_loc) {
1878 ret = ocfs2_xattr_free_block(inode,
1879 le64_to_cpu(di->i_xattr_loc));
cf1d6c76
TY		 1880 if (ret < 0) {
1881 mlog_errno(ret);
1882 goto out;
1883 }
1884 }
1885
1886 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
1887 OCFS2_INODE_UPDATE_CREDITS);
1888 if (IS_ERR(handle)) {
1889 ret = PTR_ERR(handle);
1890 mlog_errno(ret);
1891 goto out;
1892 }
1893 ret = ocfs2_journal_access(handle, inode, di_bh,
1894 OCFS2_JOURNAL_ACCESS_WRITE);
1895 if (ret) {
1896 mlog_errno(ret);
1897 goto out_commit;
1898 }
1899
08413899 1900 di->i_xattr_loc = 0;
cf1d6c76
TY		 1901
1902 spin_lock(&oi->ip_lock);
1903 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
1904 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
1905 spin_unlock(&oi->ip_lock);
1906
1907 ret = ocfs2_journal_dirty(handle, di_bh);
1908 if (ret < 0)
1909 mlog_errno(ret);
1910out_commit:
1911 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
1912out:
cf1d6c76
TY		 1913 return ret;
1914}
1915
1916static int ocfs2_xattr_has_space_inline(struct inode *inode,
1917 struct ocfs2_dinode *di)
1918{
1919 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1920 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
1921 int free;
1922
1923 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
1924 return 0;
1925
1926 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
1927 struct ocfs2_inline_data *idata = &di->id2.i_data;
1928 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
1929 } else if (ocfs2_inode_is_fast_symlink(inode)) {
1930 free = ocfs2_fast_symlink_chars(inode->i_sb) -
1931 le64_to_cpu(di->i_size);
1932 } else {
1933 struct ocfs2_extent_list *el = &di->id2.i_list;
1934 free = (le16_to_cpu(el->l_count) -
1935 le16_to_cpu(el->l_next_free_rec)) *
1936 sizeof(struct ocfs2_extent_rec);
1937 }
1938 if (free >= xattrsize)
1939 return 1;
1940
1941 return 0;
1942}
1943
1944/*
1945 * ocfs2_xattr_ibody_find()
1946 *
1947 * Find extended attribute in inode block and
1948 * fill search info into struct ocfs2_xattr_search.
1949 */
1950static int ocfs2_xattr_ibody_find(struct inode *inode,
1951 int name_index,
1952 const char *name,
1953 struct ocfs2_xattr_search *xs)
1954{
1955 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1956 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
1957 int ret;
1958 int has_space = 0;
1959
1960 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
1961 return 0;
1962
1963 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
1964 down_read(&oi->ip_alloc_sem);
1965 has_space = ocfs2_xattr_has_space_inline(inode, di);
1966 up_read(&oi->ip_alloc_sem);
1967 if (!has_space)
1968 return 0;
1969 }
1970
1971 xs->xattr_bh = xs->inode_bh;
1972 xs->end = (void *)di + inode->i_sb->s_blocksize;
1973 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
1974 xs->header = (struct ocfs2_xattr_header *)
1975 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1976 else
1977 xs->header = (struct ocfs2_xattr_header *)
1978 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
1979 xs->base = (void *)xs->header;
1980 xs->here = xs->header->xh_entries;
1981
1982 /* Find the named attribute. */
1983 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
1984 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1985 if (ret && ret != -ENODATA)
1986 return ret;
1987 xs->not_found = ret;
1988 }
1989
1990 return 0;
1991}
1992
1993/*
1994 * ocfs2_xattr_ibody_set()
1995 *
1996 * Set, replace or remove an extended attribute into inode block.
1997 *
1998 */
1999static int ocfs2_xattr_ibody_set(struct inode *inode,
2000 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2001 struct ocfs2_xattr_search *xs,
2002 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76
TY		 2003{
2004 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2005 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2006 int ret;
2007
2008 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2009 return -ENOSPC;
2010
2011 down_write(&oi->ip_alloc_sem);
2012 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2013 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2014 ret = -ENOSPC;
2015 goto out;
2016 }
2017 }
2018
78f30c31 2019 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
cf1d6c76
TY		 2020 (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
2021out:
2022 up_write(&oi->ip_alloc_sem);
2023
2024 return ret;
2025}
2026
2027/*
2028 * ocfs2_xattr_block_find()
2029 *
2030 * Find extended attribute in external block and
2031 * fill search info into struct ocfs2_xattr_search.
2032 */
2033static int ocfs2_xattr_block_find(struct inode *inode,
2034 int name_index,
2035 const char *name,
2036 struct ocfs2_xattr_search *xs)
2037{
2038 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2039 struct buffer_head *blk_bh = NULL;
589dc260 2040 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 2041 int ret = 0;
2042
2043 if (!di->i_xattr_loc)
2044 return ret;
2045
4ae1d69b
JB		 2046 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2047 &blk_bh);
cf1d6c76
TY		 2048 if (ret < 0) {
2049 mlog_errno(ret);
2050 return ret;
2051 }
f6087fb7 2052
cf1d6c76 2053 xs->xattr_bh = blk_bh;
4ae1d69b 2054 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
589dc260
TM		 2055
2056 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2057 xs->header = &xb->xb_attrs.xb_header;
2058 xs->base = (void *)xs->header;
2059 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2060 xs->here = xs->header->xh_entries;
2061
2062 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2063 } else
2064 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2065 name_index,
2066 name, xs);
cf1d6c76 2067
cf1d6c76
TY		 2068 if (ret && ret != -ENODATA) {
2069 xs->xattr_bh = NULL;
2070 goto cleanup;
2071 }
2072 xs->not_found = ret;
2073 return 0;
cf1d6c76
TY		 2074cleanup:
2075 brelse(blk_bh);
2076
2077 return ret;
2078}
2079
2080/*
2081 * ocfs2_xattr_block_set()
2082 *
2083 * Set, replace or remove an extended attribute into external block.
2084 *
2085 */
2086static int ocfs2_xattr_block_set(struct inode *inode,
2087 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2088 struct ocfs2_xattr_search *xs,
2089 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76
TY		 2090{
2091 struct buffer_head *new_bh = NULL;
2092 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2093 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
85db90e7 2094 handle_t *handle = ctxt->handle;
cf1d6c76
TY		 2095 struct ocfs2_xattr_block *xblk = NULL;
2096 u16 suballoc_bit_start;
2097 u32 num_got;
2098 u64 first_blkno;
2099 int ret;
2100
2101 if (!xs->xattr_bh) {
cf1d6c76
TY		 2102 ret = ocfs2_journal_access(handle, inode, xs->inode_bh,
2103 OCFS2_JOURNAL_ACCESS_CREATE);
2104 if (ret < 0) {
2105 mlog_errno(ret);
85db90e7 2106 goto end;
cf1d6c76
TY		 2107 }
2108
78f30c31 2109 ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
cf1d6c76
TY		 2110 &suballoc_bit_start, &num_got,
2111 &first_blkno);
2112 if (ret < 0) {
2113 mlog_errno(ret);
85db90e7 2114 goto end;
cf1d6c76
TY		 2115 }
2116
2117 new_bh = sb_getblk(inode->i_sb, first_blkno);
2118 ocfs2_set_new_buffer_uptodate(inode, new_bh);
2119
2120 ret = ocfs2_journal_access(handle, inode, new_bh,
2121 OCFS2_JOURNAL_ACCESS_CREATE);
2122 if (ret < 0) {
2123 mlog_errno(ret);
85db90e7 2124 goto end;
cf1d6c76
TY		 2125 }
2126
2127 /* Initialize ocfs2_xattr_block */
2128 xs->xattr_bh = new_bh;
2129 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2130 memset(xblk, 0, inode->i_sb->s_blocksize);
2131 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
2132 xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
2133 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
2134 xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
2135 xblk->xb_blkno = cpu_to_le64(first_blkno);
2136
2137 xs->header = &xblk->xb_attrs.xb_header;
2138 xs->base = (void *)xs->header;
2139 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2140 xs->here = xs->header->xh_entries;
2141
cf1d6c76
TY		 2142 ret = ocfs2_journal_dirty(handle, new_bh);
2143 if (ret < 0) {
2144 mlog_errno(ret);
85db90e7 2145 goto end;
cf1d6c76
TY		 2146 }
2147 di->i_xattr_loc = cpu_to_le64(first_blkno);
85db90e7 2148 ocfs2_journal_dirty(handle, xs->inode_bh);
01225596
TM		 2149 } else
2150 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2151
2152 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
2153 /* Set extended attribute into external block */
78f30c31
TM		 2154 ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
2155 OCFS2_HAS_XATTR_FL);
01225596
TM		 2156 if (!ret || ret != -ENOSPC)
2157 goto end;
2158
78f30c31 2159 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
01225596
TM		 2160 if (ret)
2161 goto end;
cf1d6c76
TY		 2162 }
2163
78f30c31 2164 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
01225596
TM		 2165
2166end:
cf1d6c76
TY		 2167
2168 return ret;
2169}
2170
78f30c31
TM		 2171/* Check whether the new xattr can be inserted into the inode. */
2172static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2173 struct ocfs2_xattr_info *xi,
2174 struct ocfs2_xattr_search *xs)
2175{
2176 u64 value_size;
2177 struct ocfs2_xattr_entry *last;
2178 int free, i;
2179 size_t min_offs = xs->end - xs->base;
2180
2181 if (!xs->header)
2182 return 0;
2183
2184 last = xs->header->xh_entries;
2185
2186 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
2187 size_t offs = le16_to_cpu(last->xe_name_offset);
2188 if (offs < min_offs)
2189 min_offs = offs;
2190 last += 1;
2191 }
2192
2193 free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
2194 if (free < 0)
2195 return 0;
2196
2197 BUG_ON(!xs->not_found);
2198
2199 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2200 value_size = OCFS2_XATTR_ROOT_SIZE;
2201 else
2202 value_size = OCFS2_XATTR_SIZE(xi->value_len);
2203
2204 if (free >= sizeof(struct ocfs2_xattr_entry) +
2205 OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
2206 return 1;
2207
2208 return 0;
2209}
2210
2211static int ocfs2_calc_xattr_set_need(struct inode *inode,
2212 struct ocfs2_dinode *di,
2213 struct ocfs2_xattr_info *xi,
2214 struct ocfs2_xattr_search *xis,
2215 struct ocfs2_xattr_search *xbs,
2216 int *clusters_need,
85db90e7
TM		 2217 int *meta_need,
2218 int *credits_need)
78f30c31
TM		 2219{
2220 int ret = 0, old_in_xb = 0;
85db90e7 2221 int clusters_add = 0, meta_add = 0, credits = 0;
78f30c31
TM		 2222 struct buffer_head *bh = NULL;
2223 struct ocfs2_xattr_block *xb = NULL;
2224 struct ocfs2_xattr_entry *xe = NULL;
2225 struct ocfs2_xattr_value_root *xv = NULL;
2226 char *base = NULL;
2227 int name_offset, name_len = 0;
2228 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2229 xi->value_len);
2230 u64 value_size;
2231
78f30c31 2232 if (xis->not_found && xbs->not_found) {
85db90e7
TM		 2233 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2234
2235 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31 2236 clusters_add += new_clusters;
85db90e7
TM		 2237 credits += ocfs2_calc_extend_credits(inode->i_sb,
2238 &def_xv.xv.xr_list,
2239 new_clusters);
2240 }
78f30c31
TM		 2241
2242 goto meta_guess;
2243 }
2244
2245 if (!xis->not_found) {
2246 xe = xis->here;
2247 name_offset = le16_to_cpu(xe->xe_name_offset);
2248 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2249 base = xis->base;
85db90e7 2250 credits += OCFS2_INODE_UPDATE_CREDITS;
78f30c31 2251 } else {
970e4936 2252 int i, block_off = 0;
78f30c31
TM		 2253 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2254 xe = xbs->here;
2255 name_offset = le16_to_cpu(xe->xe_name_offset);
2256 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2257 i = xbs->here - xbs->header->xh_entries;
2258 old_in_xb = 1;
2259
2260 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2261 ret = ocfs2_xattr_bucket_get_name_value(inode,
2262 bucket_xh(xbs->bucket),
2263 i, &block_off,
2264 &name_offset);
2265 base = bucket_block(xbs->bucket, block_off);
85db90e7
TM		 2266 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2267 } else {
78f30c31 2268 base = xbs->base;
85db90e7
TM		 2269 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
2270 }
2271 }
2272
2273 /*
2274 * delete a xattr doesn't need metadata and cluster allocation.
2275 * so just calculate the credits and return.
2276 *
2277 * The credits for removing the value tree will be extended
2278 * by ocfs2_remove_extent itself.
2279 */
2280 if (!xi->value) {
2281 if (!ocfs2_xattr_is_local(xe))
a90714c1 2282 credits += ocfs2_remove_extent_credits(inode->i_sb);
85db90e7
TM		 2283
2284 goto out;
78f30c31
TM		 2285 }
2286
2287 /* do cluster allocation guess first. */
2288 value_size = le64_to_cpu(xe->xe_value_size);
2289
2290 if (old_in_xb) {
2291 /*
2292 * In xattr set, we always try to set the xe in inode first,
2293 * so if it can be inserted into inode successfully, the old
2294 * one will be removed from the xattr block, and this xattr
2295 * will be inserted into inode as a new xattr in inode.
2296 */
2297 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
2298 clusters_add += new_clusters;
a90714c1 2299 credits += ocfs2_remove_extent_credits(inode->i_sb) +
85db90e7
TM		 2300 OCFS2_INODE_UPDATE_CREDITS;
2301 if (!ocfs2_xattr_is_local(xe))
2302 credits += ocfs2_calc_extend_credits(
2303 inode->i_sb,
2304 &def_xv.xv.xr_list,
2305 new_clusters);
78f30c31
TM		 2306 goto out;
2307 }
2308 }
2309
2310 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2311 /* the new values will be stored outside. */
2312 u32 old_clusters = 0;
2313
2314 if (!ocfs2_xattr_is_local(xe)) {
2315 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2316 value_size);
2317 xv = (struct ocfs2_xattr_value_root *)
2318 (base + name_offset + name_len);
97aff52a 2319 value_size = OCFS2_XATTR_ROOT_SIZE;
78f30c31
TM		 2320 } else
2321 xv = &def_xv.xv;
2322
85db90e7 2323 if (old_clusters >= new_clusters) {
a90714c1 2324 credits += ocfs2_remove_extent_credits(inode->i_sb);
78f30c31 2325 goto out;
85db90e7 2326 } else {
78f30c31
TM		 2327 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
2328 clusters_add += new_clusters - old_clusters;
85db90e7
TM		 2329 credits += ocfs2_calc_extend_credits(inode->i_sb,
2330 &xv->xr_list,
2331 new_clusters -
2332 old_clusters);
97aff52a
TM		 2333 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
2334 goto out;
78f30c31
TM		 2335 }
2336 } else {
2337 /*
2338 * Now the new value will be stored inside. So if the new
2339 * value is smaller than the size of value root or the old
2340 * value, we don't need any allocation, otherwise we have
2341 * to guess metadata allocation.
2342 */
2343 if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
2344 (!ocfs2_xattr_is_local(xe) &&
2345 OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
2346 goto out;
2347 }
2348
2349meta_guess:
2350 /* calculate metadata allocation. */
2351 if (di->i_xattr_loc) {
2352 if (!xbs->xattr_bh) {
4ae1d69b
JB		 2353 ret = ocfs2_read_xattr_block(inode,
2354 le64_to_cpu(di->i_xattr_loc),
2355 &bh);
78f30c31
TM		 2356 if (ret) {
2357 mlog_errno(ret);
2358 goto out;
2359 }
2360
2361 xb = (struct ocfs2_xattr_block *)bh->b_data;
2362 } else
2363 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2364
2365 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2366 struct ocfs2_extent_list *el =
2367 &xb->xb_attrs.xb_root.xt_list;
2368 meta_add += ocfs2_extend_meta_needed(el);
85db90e7
TM		 2369 credits += ocfs2_calc_extend_credits(inode->i_sb,
2370 el, 1);
78f30c31
TM		 2371 }
2372
2373 /*
2374 * This cluster will be used either for new bucket or for
2375 * new xattr block.
2376 * If the cluster size is the same as the bucket size, one
2377 * more is needed since we may need to extend the bucket
2378 * also.
2379 */
2380 clusters_add += 1;
85db90e7 2381 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 2382 if (OCFS2_XATTR_BUCKET_SIZE ==
85db90e7
TM		 2383 OCFS2_SB(inode->i_sb)->s_clustersize) {
2384 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 2385 clusters_add += 1;
85db90e7
TM		 2386 }
2387 } else {
78f30c31 2388 meta_add += 1;
85db90e7
TM		 2389 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
2390 }
78f30c31
TM		 2391out:
2392 if (clusters_need)
2393 *clusters_need = clusters_add;
2394 if (meta_need)
2395 *meta_need = meta_add;
85db90e7
TM		 2396 if (credits_need)
2397 *credits_need = credits;
78f30c31
TM		 2398 brelse(bh);
2399 return ret;
2400}
2401
2402static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
2403 struct ocfs2_dinode *di,
2404 struct ocfs2_xattr_info *xi,
2405 struct ocfs2_xattr_search *xis,
2406 struct ocfs2_xattr_search *xbs,
85db90e7
TM		 2407 struct ocfs2_xattr_set_ctxt *ctxt,
2408 int *credits)
78f30c31
TM		 2409{
2410 int clusters_add, meta_add, ret;
2411 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2412
2413 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
2414
2415 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
2416
2417 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
85db90e7 2418 &clusters_add, &meta_add, credits);
78f30c31
TM		 2419 if (ret) {
2420 mlog_errno(ret);
2421 return ret;
2422 }
2423
85db90e7
TM		 2424 mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
2425 "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
78f30c31
TM		 2426
2427 if (meta_add) {
2428 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
2429 &ctxt->meta_ac);
2430 if (ret) {
2431 mlog_errno(ret);
2432 goto out;
2433 }
2434 }
2435
2436 if (clusters_add) {
2437 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
2438 if (ret)
2439 mlog_errno(ret);
2440 }
2441out:
2442 if (ret) {
2443 if (ctxt->meta_ac) {
2444 ocfs2_free_alloc_context(ctxt->meta_ac);
2445 ctxt->meta_ac = NULL;
2446 }
2447
2448 /*
2449 * We cannot have an error and a non null ctxt->data_ac.
2450 */
2451 }
2452
2453 return ret;
2454}
2455
85db90e7
TM		 2456static int __ocfs2_xattr_set_handle(struct inode *inode,
2457 struct ocfs2_dinode *di,
2458 struct ocfs2_xattr_info *xi,
2459 struct ocfs2_xattr_search *xis,
2460 struct ocfs2_xattr_search *xbs,
2461 struct ocfs2_xattr_set_ctxt *ctxt)
2462{
9f868f16 2463 int ret = 0, credits, old_found;
85db90e7
TM		 2464
2465 if (!xi->value) {
2466 /* Remove existing extended attribute */
2467 if (!xis->not_found)
2468 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2469 else if (!xbs->not_found)
2470 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2471 } else {
2472 /* We always try to set extended attribute into inode first*/
2473 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2474 if (!ret && !xbs->not_found) {
2475 /*
2476 * If succeed and that extended attribute existing in
2477 * external block, then we will remove it.
2478 */
2479 xi->value = NULL;
2480 xi->value_len = 0;
2481
9f868f16 2482 old_found = xis->not_found;
85db90e7
TM		 2483 xis->not_found = -ENODATA;
2484 ret = ocfs2_calc_xattr_set_need(inode,
2485 di,
2486 xi,
2487 xis,
2488 xbs,
2489 NULL,
2490 NULL,
2491 &credits);
9f868f16 2492 xis->not_found = old_found;
85db90e7
TM		 2493 if (ret) {
2494 mlog_errno(ret);
2495 goto out;
2496 }
2497
2498 ret = ocfs2_extend_trans(ctxt->handle, credits +
2499 ctxt->handle->h_buffer_credits);
2500 if (ret) {
2501 mlog_errno(ret);
2502 goto out;
2503 }
2504 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2505 } else if (ret == -ENOSPC) {
2506 if (di->i_xattr_loc && !xbs->xattr_bh) {
2507 ret = ocfs2_xattr_block_find(inode,
2508 xi->name_index,
2509 xi->name, xbs);
2510 if (ret)
2511 goto out;
2512
9f868f16 2513 old_found = xis->not_found;
85db90e7
TM		 2514 xis->not_found = -ENODATA;
2515 ret = ocfs2_calc_xattr_set_need(inode,
2516 di,
2517 xi,
2518 xis,
2519 xbs,
2520 NULL,
2521 NULL,
2522 &credits);
9f868f16 2523 xis->not_found = old_found;
85db90e7
TM		 2524 if (ret) {
2525 mlog_errno(ret);
2526 goto out;
2527 }
2528
2529 ret = ocfs2_extend_trans(ctxt->handle, credits +
2530 ctxt->handle->h_buffer_credits);
2531 if (ret) {
2532 mlog_errno(ret);
2533 goto out;
2534 }
2535 }
2536 /*
2537 * If no space in inode, we will set extended attribute
2538 * into external block.
2539 */
2540 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2541 if (ret)
2542 goto out;
2543 if (!xis->not_found) {
2544 /*
2545 * If succeed and that extended attribute
2546 * existing in inode, we will remove it.
2547 */
2548 xi->value = NULL;
2549 xi->value_len = 0;
2550 xbs->not_found = -ENODATA;
2551 ret = ocfs2_calc_xattr_set_need(inode,
2552 di,
2553 xi,
2554 xis,
2555 xbs,
2556 NULL,
2557 NULL,
2558 &credits);
2559 if (ret) {
2560 mlog_errno(ret);
2561 goto out;
2562 }
2563
2564 ret = ocfs2_extend_trans(ctxt->handle, credits +
2565 ctxt->handle->h_buffer_credits);
2566 if (ret) {
2567 mlog_errno(ret);
2568 goto out;
2569 }
2570 ret = ocfs2_xattr_ibody_set(inode, xi,
2571 xis, ctxt);
2572 }
2573 }
2574 }
2575
2576out:
2577 return ret;
2578}
2579
6c3faba4
TY		 2580/*
2581 * This function only called duing creating inode
2582 * for init security/acl xattrs of the new inode.
2583 * The xattrs could be put into ibody or extent block,
2584 * xattr bucket would not be use in this case.
2585 * transanction credits also be reserved in here.
2586 */
2587int ocfs2_xattr_set_handle(handle_t *handle,
2588 struct inode *inode,
2589 struct buffer_head *di_bh,
2590 int name_index,
2591 const char *name,
2592 const void *value,
2593 size_t value_len,
2594 int flags,
2595 struct ocfs2_alloc_context *meta_ac,
2596 struct ocfs2_alloc_context *data_ac)
2597{
2598 struct ocfs2_dinode *di;
2599 int ret;
2600
2601 struct ocfs2_xattr_info xi = {
2602 .name_index = name_index,
2603 .name = name,
2604 .value = value,
2605 .value_len = value_len,
2606 };
2607
2608 struct ocfs2_xattr_search xis = {
2609 .not_found = -ENODATA,
2610 };
2611
2612 struct ocfs2_xattr_search xbs = {
2613 .not_found = -ENODATA,
2614 };
2615
2616 struct ocfs2_xattr_set_ctxt ctxt = {
2617 .handle = handle,
2618 .meta_ac = meta_ac,
2619 .data_ac = data_ac,
2620 };
2621
2622 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2623 return -EOPNOTSUPP;
2624
2625 xis.inode_bh = xbs.inode_bh = di_bh;
2626 di = (struct ocfs2_dinode *)di_bh->b_data;
2627
2628 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2629
2630 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2631 if (ret)
2632 goto cleanup;
2633 if (xis.not_found) {
2634 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2635 if (ret)
2636 goto cleanup;
2637 }
2638
2639 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2640
2641cleanup:
2642 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2643 brelse(xbs.xattr_bh);
2644
2645 return ret;
2646}
2647
cf1d6c76
TY		 2648/*
2649 * ocfs2_xattr_set()
2650 *
2651 * Set, replace or remove an extended attribute for this inode.
2652 * value is NULL to remove an existing extended attribute, else either
2653 * create or replace an extended attribute.
2654 */
2655int ocfs2_xattr_set(struct inode *inode,
2656 int name_index,
2657 const char *name,
2658 const void *value,
2659 size_t value_len,
2660 int flags)
2661{
2662 struct buffer_head *di_bh = NULL;
2663 struct ocfs2_dinode *di;
85db90e7 2664 int ret, credits;
78f30c31 2665 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
85db90e7 2666 struct inode *tl_inode = osb->osb_tl_inode;
78f30c31 2667 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
cf1d6c76
TY		 2668
2669 struct ocfs2_xattr_info xi = {
2670 .name_index = name_index,
2671 .name = name,
2672 .value = value,
2673 .value_len = value_len,
2674 };
2675
2676 struct ocfs2_xattr_search xis = {
2677 .not_found = -ENODATA,
2678 };
2679
2680 struct ocfs2_xattr_search xbs = {
2681 .not_found = -ENODATA,
2682 };
2683
8154da3d
TY		 2684 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2685 return -EOPNOTSUPP;
2686
ba937127
JB		 2687 /*
2688 * Only xbs will be used on indexed trees. xis doesn't need a
2689 * bucket.
2690 */
2691 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2692 if (!xbs.bucket) {
2693 mlog_errno(-ENOMEM);
2694 return -ENOMEM;
2695 }
2696
cf1d6c76
TY		 2697 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2698 if (ret < 0) {
2699 mlog_errno(ret);
ba937127 2700 goto cleanup_nolock;
cf1d6c76
TY		 2701 }
2702 xis.inode_bh = xbs.inode_bh = di_bh;
2703 di = (struct ocfs2_dinode *)di_bh->b_data;
2704
2705 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2706 /*
2707 * Scan inode and external block to find the same name
2708 * extended attribute and collect search infomation.
2709 */
2710 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2711 if (ret)
2712 goto cleanup;
2713 if (xis.not_found) {
2714 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2715 if (ret)
2716 goto cleanup;
2717 }
2718
2719 if (xis.not_found && xbs.not_found) {
2720 ret = -ENODATA;
2721 if (flags & XATTR_REPLACE)
2722 goto cleanup;
2723 ret = 0;
2724 if (!value)
2725 goto cleanup;
2726 } else {
2727 ret = -EEXIST;
2728 if (flags & XATTR_CREATE)
2729 goto cleanup;
2730 }
2731
85db90e7
TM		 2732
2733 mutex_lock(&tl_inode->i_mutex);
2734
2735 if (ocfs2_truncate_log_needs_flush(osb)) {
2736 ret = __ocfs2_flush_truncate_log(osb);
2737 if (ret < 0) {
2738 mutex_unlock(&tl_inode->i_mutex);
2739 mlog_errno(ret);
2740 goto cleanup;
2741 }
2742 }
2743 mutex_unlock(&tl_inode->i_mutex);
2744
2745 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
2746 &xbs, &ctxt, &credits);
78f30c31
TM		 2747 if (ret) {
2748 mlog_errno(ret);
2749 goto cleanup;
2750 }
2751
85db90e7
TM		 2752 ctxt.handle = ocfs2_start_trans(osb, credits);
2753 if (IS_ERR(ctxt.handle)) {
2754 ret = PTR_ERR(ctxt.handle);
2755 mlog_errno(ret);
2756 goto cleanup;
cf1d6c76 2757 }
85db90e7
TM		 2758
2759 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2760
2761 ocfs2_commit_trans(osb, ctxt.handle);
2762
78f30c31
TM		 2763 if (ctxt.data_ac)
2764 ocfs2_free_alloc_context(ctxt.data_ac);
2765 if (ctxt.meta_ac)
2766 ocfs2_free_alloc_context(ctxt.meta_ac);
2767 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
2768 ocfs2_schedule_truncate_log_flush(osb, 1);
2769 ocfs2_run_deallocs(osb, &ctxt.dealloc);
cf1d6c76
TY		 2770cleanup:
2771 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2772 ocfs2_inode_unlock(inode, 1);
ba937127 2773cleanup_nolock:
cf1d6c76
TY		 2774 brelse(di_bh);
2775 brelse(xbs.xattr_bh);
ba937127 2776 ocfs2_xattr_bucket_free(xbs.bucket);
cf1d6c76
TY		 2777
2778 return ret;
2779}
2780
0c044f0b
TM		 2781/*
2782 * Find the xattr extent rec which may contains name_hash.
2783 * e_cpos will be the first name hash of the xattr rec.
2784 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
2785 */
2786static int ocfs2_xattr_get_rec(struct inode *inode,
2787 u32 name_hash,
2788 u64 *p_blkno,
2789 u32 *e_cpos,
2790 u32 *num_clusters,
2791 struct ocfs2_extent_list *el)
2792{
2793 int ret = 0, i;
2794 struct buffer_head *eb_bh = NULL;
2795 struct ocfs2_extent_block *eb;
2796 struct ocfs2_extent_rec *rec = NULL;
2797 u64 e_blkno = 0;
2798
2799 if (el->l_tree_depth) {
2800 ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh);
2801 if (ret) {
2802 mlog_errno(ret);
2803 goto out;
2804 }
2805
2806 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
2807 el = &eb->h_list;
2808
2809 if (el->l_tree_depth) {
2810 ocfs2_error(inode->i_sb,
2811 "Inode %lu has non zero tree depth in "
2812 "xattr tree block %llu\n", inode->i_ino,
2813 (unsigned long long)eb_bh->b_blocknr);
2814 ret = -EROFS;
2815 goto out;
2816 }
2817 }
2818
2819 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
2820 rec = &el->l_recs[i];
2821
2822 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
2823 e_blkno = le64_to_cpu(rec->e_blkno);
2824 break;
2825 }
2826 }
2827
2828 if (!e_blkno) {
2829 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
2830 "record (%u, %u, 0) in xattr", inode->i_ino,
2831 le32_to_cpu(rec->e_cpos),
2832 ocfs2_rec_clusters(el, rec));
2833 ret = -EROFS;
2834 goto out;
2835 }
2836
2837 *p_blkno = le64_to_cpu(rec->e_blkno);
2838 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
2839 if (e_cpos)
2840 *e_cpos = le32_to_cpu(rec->e_cpos);
2841out:
2842 brelse(eb_bh);
2843 return ret;
2844}
2845
2846typedef int (xattr_bucket_func)(struct inode *inode,
2847 struct ocfs2_xattr_bucket *bucket,
2848 void *para);
2849
589dc260 2850static int ocfs2_find_xe_in_bucket(struct inode *inode,
e2356a3f 2851 struct ocfs2_xattr_bucket *bucket,
589dc260
TM		 2852 int name_index,
2853 const char *name,
2854 u32 name_hash,
2855 u16 *xe_index,
2856 int *found)
2857{
2858 int i, ret = 0, cmp = 1, block_off, new_offset;
e2356a3f 2859 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
589dc260
TM		 2860 size_t name_len = strlen(name);
2861 struct ocfs2_xattr_entry *xe = NULL;
589dc260
TM		 2862 char *xe_name;
2863
2864 /*
2865 * We don't use binary search in the bucket because there
2866 * may be multiple entries with the same name hash.
2867 */
2868 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
2869 xe = &xh->xh_entries[i];
2870
2871 if (name_hash > le32_to_cpu(xe->xe_name_hash))
2872 continue;
2873 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
2874 break;
2875
2876 cmp = name_index - ocfs2_xattr_get_type(xe);
2877 if (!cmp)
2878 cmp = name_len - xe->xe_name_len;
2879 if (cmp)
2880 continue;
2881
2882 ret = ocfs2_xattr_bucket_get_name_value(inode,
2883 xh,
2884 i,
2885 &block_off,
2886 &new_offset);
2887 if (ret) {
2888 mlog_errno(ret);
2889 break;
2890 }
2891
970e4936 2892
e2356a3f
JB		 2893 xe_name = bucket_block(bucket, block_off) + new_offset;
2894 if (!memcmp(name, xe_name, name_len)) {
589dc260
TM		 2895 *xe_index = i;
2896 *found = 1;
2897 ret = 0;
2898 break;
2899 }
2900 }
2901
2902 return ret;
2903}
2904
2905/*
2906 * Find the specified xattr entry in a series of buckets.
2907 * This series start from p_blkno and last for num_clusters.
2908 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
2909 * the num of the valid buckets.
2910 *
2911 * Return the buffer_head this xattr should reside in. And if the xattr's
2912 * hash is in the gap of 2 buckets, return the lower bucket.
2913 */
2914static int ocfs2_xattr_bucket_find(struct inode *inode,
2915 int name_index,
2916 const char *name,
2917 u32 name_hash,
2918 u64 p_blkno,
2919 u32 first_hash,
2920 u32 num_clusters,
2921 struct ocfs2_xattr_search *xs)
2922{
2923 int ret, found = 0;
589dc260
TM		 2924 struct ocfs2_xattr_header *xh = NULL;
2925 struct ocfs2_xattr_entry *xe = NULL;
2926 u16 index = 0;
2927 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2928 int low_bucket = 0, bucket, high_bucket;
e2356a3f 2929 struct ocfs2_xattr_bucket *search;
589dc260 2930 u32 last_hash;
e2356a3f 2931 u64 blkno, lower_blkno = 0;
589dc260 2932
e2356a3f
JB		 2933 search = ocfs2_xattr_bucket_new(inode);
2934 if (!search) {
2935 ret = -ENOMEM;
2936 mlog_errno(ret);
2937 goto out;
2938 }
2939
2940 ret = ocfs2_read_xattr_bucket(search, p_blkno);
589dc260
TM		 2941 if (ret) {
2942 mlog_errno(ret);
2943 goto out;
2944 }
2945
e2356a3f 2946 xh = bucket_xh(search);
589dc260 2947 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
589dc260 2948 while (low_bucket <= high_bucket) {
e2356a3f 2949 ocfs2_xattr_bucket_relse(search);
589dc260 2950
e2356a3f 2951 bucket = (low_bucket + high_bucket) / 2;
589dc260 2952 blkno = p_blkno + bucket * blk_per_bucket;
e2356a3f 2953 ret = ocfs2_read_xattr_bucket(search, blkno);
589dc260
TM		 2954 if (ret) {
2955 mlog_errno(ret);
2956 goto out;
2957 }
2958
e2356a3f 2959 xh = bucket_xh(search);
589dc260
TM		 2960 xe = &xh->xh_entries[0];
2961 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
2962 high_bucket = bucket - 1;
2963 continue;
2964 }
2965
2966 /*
2967 * Check whether the hash of the last entry in our
5a095611
TM		 2968 * bucket is larger than the search one. for an empty
2969 * bucket, the last one is also the first one.
589dc260 2970 */
5a095611
TM		 2971 if (xh->xh_count)
2972 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
2973
589dc260
TM		 2974 last_hash = le32_to_cpu(xe->xe_name_hash);
2975
e2356a3f
JB		 2976 /* record lower_blkno which may be the insert place. */
2977 lower_blkno = blkno;
589dc260
TM		 2978
2979 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
2980 low_bucket = bucket + 1;
2981 continue;
2982 }
2983
2984 /* the searched xattr should reside in this bucket if exists. */
e2356a3f 2985 ret = ocfs2_find_xe_in_bucket(inode, search,
589dc260
TM		 2986 name_index, name, name_hash,
2987 &index, &found);
2988 if (ret) {
2989 mlog_errno(ret);
2990 goto out;
2991 }
2992 break;
2993 }
2994
2995 /*
2996 * Record the bucket we have found.
2997 * When the xattr's hash value is in the gap of 2 buckets, we will
2998 * always set it to the previous bucket.
2999 */
e2356a3f
JB		 3000 if (!lower_blkno)
3001 lower_blkno = p_blkno;
3002
3003 /* This should be in cache - we just read it during the search */
3004 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3005 if (ret) {
3006 mlog_errno(ret);
3007 goto out;
589dc260 3008 }
589dc260 3009
ba937127
JB		 3010 xs->header = bucket_xh(xs->bucket);
3011 xs->base = bucket_block(xs->bucket, 0);
589dc260
TM		 3012 xs->end = xs->base + inode->i_sb->s_blocksize;
3013
3014 if (found) {
589dc260
TM		 3015 xs->here = &xs->header->xh_entries[index];
3016 mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name,
ba937127 3017 (unsigned long long)bucket_blkno(xs->bucket), index);
589dc260
TM		 3018 } else
3019 ret = -ENODATA;
3020
3021out:
e2356a3f 3022 ocfs2_xattr_bucket_free(search);
589dc260
TM		 3023 return ret;
3024}
3025
3026static int ocfs2_xattr_index_block_find(struct inode *inode,
3027 struct buffer_head *root_bh,
3028 int name_index,
3029 const char *name,
3030 struct ocfs2_xattr_search *xs)
3031{
3032 int ret;
3033 struct ocfs2_xattr_block *xb =
3034 (struct ocfs2_xattr_block *)root_bh->b_data;
3035 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3036 struct ocfs2_extent_list *el = &xb_root->xt_list;
3037 u64 p_blkno = 0;
3038 u32 first_hash, num_clusters = 0;
2057e5c6 3039 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
589dc260
TM		 3040
3041 if (le16_to_cpu(el->l_next_free_rec) == 0)
3042 return -ENODATA;
3043
3044 mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n",
3045 name, name_hash, name_index);
3046
3047 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3048 &num_clusters, el);
3049 if (ret) {
3050 mlog_errno(ret);
3051 goto out;
3052 }
3053
3054 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3055
3056 mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
de29c085
MF		 3057 "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
3058 first_hash);
589dc260
TM		 3059
3060 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3061 p_blkno, first_hash, num_clusters, xs);
3062
3063out:
3064 return ret;
3065}
3066
0c044f0b
TM		 3067static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3068 u64 blkno,
3069 u32 clusters,
3070 xattr_bucket_func *func,
3071 void *para)
3072{
6dde41d9 3073 int i, ret = 0;
0c044f0b
TM		 3074 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3075 u32 num_buckets = clusters * bpc;
ba937127 3076 struct ocfs2_xattr_bucket *bucket;
0c044f0b 3077
ba937127
JB		 3078 bucket = ocfs2_xattr_bucket_new(inode);
3079 if (!bucket) {
3080 mlog_errno(-ENOMEM);
3081 return -ENOMEM;
3082 }
0c044f0b
TM		 3083
3084 mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
de29c085 3085 clusters, (unsigned long long)blkno);
0c044f0b 3086
ba937127
JB		 3087 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3088 ret = ocfs2_read_xattr_bucket(bucket, blkno);
0c044f0b
TM		 3089 if (ret) {
3090 mlog_errno(ret);
ba937127 3091 break;
0c044f0b
TM		 3092 }
3093
0c044f0b
TM		 3094 /*
3095 * The real bucket num in this series of blocks is stored
3096 * in the 1st bucket.
3097 */
3098 if (i == 0)
ba937127 3099 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
0c044f0b 3100
de29c085
MF		 3101 mlog(0, "iterating xattr bucket %llu, first hash %u\n",
3102 (unsigned long long)blkno,
ba937127 3103 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
0c044f0b 3104 if (func) {
ba937127
JB		 3105 ret = func(inode, bucket, para);
3106 if (ret)
0c044f0b 3107 mlog_errno(ret);
ba937127 3108 /* Fall through to bucket_relse() */
0c044f0b
TM		 3109 }
3110
ba937127
JB		 3111 ocfs2_xattr_bucket_relse(bucket);
3112 if (ret)
3113 break;
0c044f0b
TM		 3114 }
3115
ba937127 3116 ocfs2_xattr_bucket_free(bucket);
0c044f0b
TM		 3117 return ret;
3118}
3119
3120struct ocfs2_xattr_tree_list {
3121 char *buffer;
3122 size_t buffer_size;
936b8834 3123 size_t result;
0c044f0b
TM		 3124};
3125
3126static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
3127 struct ocfs2_xattr_header *xh,
3128 int index,
3129 int *block_off,
3130 int *new_offset)
3131{
3132 u16 name_offset;
3133
3134 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
3135 return -EINVAL;
3136
3137 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
3138
3139 *block_off = name_offset >> inode->i_sb->s_blocksize_bits;
3140 *new_offset = name_offset % inode->i_sb->s_blocksize;
3141
3142 return 0;
3143}
3144
3145static int ocfs2_list_xattr_bucket(struct inode *inode,
3146 struct ocfs2_xattr_bucket *bucket,
3147 void *para)
3148{
936b8834 3149 int ret = 0, type;
0c044f0b 3150 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
0c044f0b 3151 int i, block_off, new_offset;
936b8834 3152 const char *prefix, *name;
0c044f0b 3153
3e632946
JB		 3154 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
3155 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
936b8834
TM		 3156 type = ocfs2_xattr_get_type(entry);
3157 prefix = ocfs2_xattr_prefix(type);
0c044f0b 3158
936b8834 3159 if (prefix) {
0c044f0b 3160 ret = ocfs2_xattr_bucket_get_name_value(inode,
3e632946 3161 bucket_xh(bucket),
0c044f0b
TM		 3162 i,
3163 &block_off,
3164 &new_offset);
3165 if (ret)
3166 break;
936b8834 3167
51def39f 3168 name = (const char *)bucket_block(bucket, block_off) +
936b8834
TM		 3169 new_offset;
3170 ret = ocfs2_xattr_list_entry(xl->buffer,
3171 xl->buffer_size,
3172 &xl->result,
3173 prefix, name,
3174 entry->xe_name_len);
3175 if (ret)
3176 break;
0c044f0b
TM		 3177 }
3178 }
3179
3180 return ret;
3181}
3182
3183static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
3184 struct ocfs2_xattr_tree_root *xt,
3185 char *buffer,
3186 size_t buffer_size)
3187{
3188 struct ocfs2_extent_list *el = &xt->xt_list;
3189 int ret = 0;
3190 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
3191 u64 p_blkno = 0;
3192 struct ocfs2_xattr_tree_list xl = {
3193 .buffer = buffer,
3194 .buffer_size = buffer_size,
936b8834 3195 .result = 0,
0c044f0b
TM		 3196 };
3197
3198 if (le16_to_cpu(el->l_next_free_rec) == 0)
3199 return 0;
3200
3201 while (name_hash > 0) {
3202 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
3203 &e_cpos, &num_clusters, el);
3204 if (ret) {
3205 mlog_errno(ret);
3206 goto out;
3207 }
3208
3209 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
3210 ocfs2_list_xattr_bucket,
3211 &xl);
3212 if (ret) {
3213 mlog_errno(ret);
3214 goto out;
3215 }
3216
3217 if (e_cpos == 0)
3218 break;
3219
3220 name_hash = e_cpos - 1;
3221 }
3222
936b8834 3223 ret = xl.result;
0c044f0b
TM		 3224out:
3225 return ret;
3226}
01225596
TM		 3227
3228static int cmp_xe(const void *a, const void *b)
3229{
3230 const struct ocfs2_xattr_entry *l = a, *r = b;
3231 u32 l_hash = le32_to_cpu(l->xe_name_hash);
3232 u32 r_hash = le32_to_cpu(r->xe_name_hash);
3233
3234 if (l_hash > r_hash)
3235 return 1;
3236 if (l_hash < r_hash)
3237 return -1;
3238 return 0;
3239}
3240
3241static void swap_xe(void *a, void *b, int size)
3242{
3243 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
3244
3245 tmp = *l;
3246 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
3247 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
3248}
3249
3250/*
3251 * When the ocfs2_xattr_block is filled up, new bucket will be created
3252 * and all the xattr entries will be moved to the new bucket.
178eeac3
JB		 3253 * The header goes at the start of the bucket, and the names+values are
3254 * filled from the end. This is why *target starts as the last buffer.
01225596
TM		 3255 * Note: we need to sort the entries since they are not saved in order
3256 * in the ocfs2_xattr_block.
3257 */
3258static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
3259 struct buffer_head *xb_bh,
178eeac3 3260 struct ocfs2_xattr_bucket *bucket)
01225596
TM		 3261{
3262 int i, blocksize = inode->i_sb->s_blocksize;
178eeac3 3263 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596
TM		 3264 u16 offset, size, off_change;
3265 struct ocfs2_xattr_entry *xe;
3266 struct ocfs2_xattr_block *xb =
3267 (struct ocfs2_xattr_block *)xb_bh->b_data;
3268 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
178eeac3 3269 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 3270 u16 count = le16_to_cpu(xb_xh->xh_count);
178eeac3
JB		 3271 char *src = xb_bh->b_data;
3272 char *target = bucket_block(bucket, blks - 1);
01225596
TM		 3273
3274 mlog(0, "cp xattr from block %llu to bucket %llu\n",
3275 (unsigned long long)xb_bh->b_blocknr,
178eeac3
JB		 3276 (unsigned long long)bucket_blkno(bucket));
3277
3278 for (i = 0; i < blks; i++)
3279 memset(bucket_block(bucket, i), 0, blocksize);
01225596 3280
01225596
TM		 3281 /*
3282 * Since the xe_name_offset is based on ocfs2_xattr_header,
3283 * there is a offset change corresponding to the change of
3284 * ocfs2_xattr_header's position.
3285 */
3286 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3287 xe = &xb_xh->xh_entries[count - 1];
3288 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
3289 size = blocksize - offset;
3290
3291 /* copy all the names and values. */
01225596
TM		 3292 memcpy(target + offset, src + offset, size);
3293
3294 /* Init new header now. */
3295 xh->xh_count = xb_xh->xh_count;
3296 xh->xh_num_buckets = cpu_to_le16(1);
3297 xh->xh_name_value_len = cpu_to_le16(size);
3298 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
3299
3300 /* copy all the entries. */
178eeac3 3301 target = bucket_block(bucket, 0);
01225596
TM		 3302 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
3303 size = count * sizeof(struct ocfs2_xattr_entry);
3304 memcpy(target + offset, (char *)xb_xh + offset, size);
3305
3306 /* Change the xe offset for all the xe because of the move. */
3307 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
3308 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3309 for (i = 0; i < count; i++)
3310 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
3311
3312 mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n",
3313 offset, size, off_change);
3314
3315 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
3316 cmp_xe, swap_xe);
3317}
3318
3319/*
3320 * After we move xattr from block to index btree, we have to
3321 * update ocfs2_xattr_search to the new xe and base.
3322 *
3323 * When the entry is in xattr block, xattr_bh indicates the storage place.
3324 * While if the entry is in index b-tree, "bucket" indicates the
3325 * real place of the xattr.
3326 */
178eeac3
JB		 3327static void ocfs2_xattr_update_xattr_search(struct inode *inode,
3328 struct ocfs2_xattr_search *xs,
3329 struct buffer_head *old_bh)
01225596 3330{
01225596
TM		 3331 char *buf = old_bh->b_data;
3332 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
3333 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
178eeac3 3334 int i;
01225596 3335
ba937127 3336 xs->header = bucket_xh(xs->bucket);
178eeac3 3337 xs->base = bucket_block(xs->bucket, 0);
01225596
TM		 3338 xs->end = xs->base + inode->i_sb->s_blocksize;
3339
178eeac3
JB		 3340 if (xs->not_found)
3341 return;
01225596 3342
178eeac3
JB		 3343 i = xs->here - old_xh->xh_entries;
3344 xs->here = &xs->header->xh_entries[i];
01225596
TM		 3345}
3346
3347static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 3348 struct ocfs2_xattr_search *xs,
3349 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 3350{
85db90e7 3351 int ret;
01225596
TM		 3352 u32 bit_off, len;
3353 u64 blkno;
85db90e7 3354 handle_t *handle = ctxt->handle;
01225596
TM		 3355 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3356 struct ocfs2_inode_info *oi = OCFS2_I(inode);
01225596
TM		 3357 struct buffer_head *xb_bh = xs->xattr_bh;
3358 struct ocfs2_xattr_block *xb =
3359 (struct ocfs2_xattr_block *)xb_bh->b_data;
3360 struct ocfs2_xattr_tree_root *xr;
3361 u16 xb_flags = le16_to_cpu(xb->xb_flags);
01225596
TM		 3362
3363 mlog(0, "create xattr index block for %llu\n",
3364 (unsigned long long)xb_bh->b_blocknr);
3365
3366 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
178eeac3 3367 BUG_ON(!xs->bucket);
01225596 3368
01225596
TM		 3369 /*
3370 * XXX:
3371 * We can use this lock for now, and maybe move to a dedicated mutex
3372 * if performance becomes a problem later.
3373 */
3374 down_write(&oi->ip_alloc_sem);
3375
01225596
TM		 3376 ret = ocfs2_journal_access(handle, inode, xb_bh,
3377 OCFS2_JOURNAL_ACCESS_WRITE);
3378 if (ret) {
3379 mlog_errno(ret);
85db90e7 3380 goto out;
01225596
TM		 3381 }
3382
78f30c31
TM		 3383 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
3384 1, 1, &bit_off, &len);
01225596
TM		 3385 if (ret) {
3386 mlog_errno(ret);
85db90e7 3387 goto out;
01225596
TM		 3388 }
3389
3390 /*
3391 * The bucket may spread in many blocks, and
3392 * we will only touch the 1st block and the last block
3393 * in the whole bucket(one for entry and one for data).
3394 */
3395 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
3396
de29c085
MF		 3397 mlog(0, "allocate 1 cluster from %llu to xattr block\n",
3398 (unsigned long long)blkno);
01225596 3399
178eeac3
JB		 3400 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno);
3401 if (ret) {
01225596 3402 mlog_errno(ret);
85db90e7 3403 goto out;
01225596
TM		 3404 }
3405
178eeac3
JB		 3406 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
3407 OCFS2_JOURNAL_ACCESS_CREATE);
01225596
TM		 3408 if (ret) {
3409 mlog_errno(ret);
85db90e7 3410 goto out;
01225596
TM		 3411 }
3412
178eeac3
JB		 3413 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
3414 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 3415
178eeac3 3416 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
01225596
TM		 3417
3418 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
3419 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
3420 offsetof(struct ocfs2_xattr_block, xb_attrs));
3421
3422 xr = &xb->xb_attrs.xb_root;
3423 xr->xt_clusters = cpu_to_le32(1);
3424 xr->xt_last_eb_blk = 0;
3425 xr->xt_list.l_tree_depth = 0;
3426 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
3427 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
3428
3429 xr->xt_list.l_recs[0].e_cpos = 0;
3430 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
3431 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
3432
3433 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
3434
85db90e7 3435 ocfs2_journal_dirty(handle, xb_bh);
01225596 3436
85db90e7 3437out:
01225596
TM		 3438 up_write(&oi->ip_alloc_sem);
3439
01225596
TM		 3440 return ret;
3441}
3442
3443static int cmp_xe_offset(const void *a, const void *b)
3444{
3445 const struct ocfs2_xattr_entry *l = a, *r = b;
3446 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
3447 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
3448
3449 if (l_name_offset < r_name_offset)
3450 return 1;
3451 if (l_name_offset > r_name_offset)
3452 return -1;
3453 return 0;
3454}
3455
3456/*
3457 * defrag a xattr bucket if we find that the bucket has some
3458 * holes beteen name/value pairs.
3459 * We will move all the name/value pairs to the end of the bucket
3460 * so that we can spare some space for insertion.
3461 */
3462static int ocfs2_defrag_xattr_bucket(struct inode *inode,
85db90e7 3463 handle_t *handle,
01225596
TM		 3464 struct ocfs2_xattr_bucket *bucket)
3465{
3466 int ret, i;
3467 size_t end, offset, len, value_len;
3468 struct ocfs2_xattr_header *xh;
3469 char *entries, *buf, *bucket_buf = NULL;
9c7759aa 3470 u64 blkno = bucket_blkno(bucket);
01225596 3471 u16 xh_free_start;
01225596 3472 size_t blocksize = inode->i_sb->s_blocksize;
01225596 3473 struct ocfs2_xattr_entry *xe;
01225596
TM		 3474
3475 /*
3476 * In order to make the operation more efficient and generic,
3477 * we copy all the blocks into a contiguous memory and do the
3478 * defragment there, so if anything is error, we will not touch
3479 * the real block.
3480 */
3481 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
3482 if (!bucket_buf) {
3483 ret = -EIO;
3484 goto out;
3485 }
3486
3487 buf = bucket_buf;
1c32a2fd
TM		 3488 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3489 memcpy(buf, bucket_block(bucket, i), blocksize);
01225596 3490
1c32a2fd 3491 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
161d6f30
JB		 3492 OCFS2_JOURNAL_ACCESS_WRITE);
3493 if (ret < 0) {
3494 mlog_errno(ret);
85db90e7 3495 goto out;
01225596
TM		 3496 }
3497
3498 xh = (struct ocfs2_xattr_header *)bucket_buf;
3499 entries = (char *)xh->xh_entries;
3500 xh_free_start = le16_to_cpu(xh->xh_free_start);
3501
3502 mlog(0, "adjust xattr bucket in %llu, count = %u, "
3503 "xh_free_start = %u, xh_name_value_len = %u.\n",
de29c085
MF		 3504 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
3505 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
01225596
TM		 3506
3507 /*
3508 * sort all the entries by their offset.
3509 * the largest will be the first, so that we can
3510 * move them to the end one by one.
3511 */
3512 sort(entries, le16_to_cpu(xh->xh_count),
3513 sizeof(struct ocfs2_xattr_entry),
3514 cmp_xe_offset, swap_xe);
3515
3516 /* Move all name/values to the end of the bucket. */
3517 xe = xh->xh_entries;
3518 end = OCFS2_XATTR_BUCKET_SIZE;
3519 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
3520 offset = le16_to_cpu(xe->xe_name_offset);
3521 if (ocfs2_xattr_is_local(xe))
3522 value_len = OCFS2_XATTR_SIZE(
3523 le64_to_cpu(xe->xe_value_size));
3524 else
3525 value_len = OCFS2_XATTR_ROOT_SIZE;
3526 len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
3527
3528 /*
3529 * We must make sure that the name/value pair
3530 * exist in the same block. So adjust end to
3531 * the previous block end if needed.
3532 */
3533 if (((end - len) / blocksize !=
3534 (end - 1) / blocksize))
3535 end = end - end % blocksize;
3536
3537 if (end > offset + len) {
3538 memmove(bucket_buf + end - len,
3539 bucket_buf + offset, len);
3540 xe->xe_name_offset = cpu_to_le16(end - len);
3541 }
3542
3543 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
3544 "bucket %llu\n", (unsigned long long)blkno);
3545
3546 end -= len;
3547 }
3548
3549 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
3550 "bucket %llu\n", (unsigned long long)blkno);
3551
3552 if (xh_free_start == end)
85db90e7 3553 goto out;
01225596
TM		 3554
3555 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
3556 xh->xh_free_start = cpu_to_le16(end);
3557
3558 /* sort the entries by their name_hash. */
3559 sort(entries, le16_to_cpu(xh->xh_count),
3560 sizeof(struct ocfs2_xattr_entry),
3561 cmp_xe, swap_xe);
3562
3563 buf = bucket_buf;
1c32a2fd
TM		 3564 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3565 memcpy(bucket_block(bucket, i), buf, blocksize);
3566 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
01225596 3567
01225596 3568out:
01225596
TM		 3569 kfree(bucket_buf);
3570 return ret;
3571}
3572
3573/*
b5c03e74
JB		 3574 * prev_blkno points to the start of an existing extent. new_blkno
3575 * points to a newly allocated extent. Because we know each of our
3576 * clusters contains more than bucket, we can easily split one cluster
3577 * at a bucket boundary. So we take the last cluster of the existing
3578 * extent and split it down the middle. We move the last half of the
3579 * buckets in the last cluster of the existing extent over to the new
3580 * extent.
01225596 3581 *
b5c03e74
JB		 3582 * first_bh is the buffer at prev_blkno so we can update the existing
3583 * extent's bucket count. header_bh is the bucket were we were hoping
3584 * to insert our xattr. If the bucket move places the target in the new
3585 * extent, we'll update first_bh and header_bh after modifying the old
3586 * extent.
3587 *
3588 * first_hash will be set as the 1st xe's name_hash in the new extent.
01225596
TM		 3589 */
3590static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
3591 handle_t *handle,
41cb8148
JB		 3592 struct ocfs2_xattr_bucket *first,
3593 struct ocfs2_xattr_bucket *target,
01225596 3594 u64 new_blkno,
01225596
TM		 3595 u32 num_clusters,
3596 u32 *first_hash)
3597{
c58b6032 3598 int ret;
41cb8148
JB		 3599 struct super_block *sb = inode->i_sb;
3600 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
3601 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
b5c03e74 3602 int to_move = num_buckets / 2;
c58b6032 3603 u64 src_blkno;
41cb8148
JB		 3604 u64 last_cluster_blkno = bucket_blkno(first) +
3605 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
01225596 3606
41cb8148
JB		 3607 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
3608 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
01225596 3609
01225596 3610 mlog(0, "move half of xattrs in cluster %llu to %llu\n",
c58b6032 3611 (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno);
01225596 3612
41cb8148 3613 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
c58b6032
JB		 3614 last_cluster_blkno, new_blkno,
3615 to_move, first_hash);
01225596
TM		 3616 if (ret) {
3617 mlog_errno(ret);
3618 goto out;
3619 }
3620
c58b6032
JB		 3621 /* This is the first bucket that got moved */
3622 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
01225596 3623
b5c03e74 3624 /*
c58b6032 3625 * If the target bucket was part of the moved buckets, we need to
41cb8148 3626 * update first and target.
b5c03e74 3627 */
41cb8148 3628 if (bucket_blkno(target) >= src_blkno) {
b5c03e74
JB		 3629 /* Find the block for the new target bucket */
3630 src_blkno = new_blkno +
41cb8148
JB		 3631 (bucket_blkno(target) - src_blkno);
3632
3633 ocfs2_xattr_bucket_relse(first);
3634 ocfs2_xattr_bucket_relse(target);
01225596 3635
b5c03e74 3636 /*
c58b6032 3637 * These shouldn't fail - the buffers are in the
b5c03e74
JB		 3638 * journal from ocfs2_cp_xattr_bucket().
3639 */
41cb8148 3640 ret = ocfs2_read_xattr_bucket(first, new_blkno);
c58b6032
JB		 3641 if (ret) {
3642 mlog_errno(ret);
3643 goto out;
3644 }
41cb8148
JB		 3645 ret = ocfs2_read_xattr_bucket(target, src_blkno);
3646 if (ret)
b5c03e74 3647 mlog_errno(ret);
01225596 3648
01225596
TM		 3649 }
3650
01225596 3651out:
01225596
TM		 3652 return ret;
3653}
3654
01225596 3655/*
80bcaf34
TM		 3656 * Find the suitable pos when we divide a bucket into 2.
3657 * We have to make sure the xattrs with the same hash value exist
3658 * in the same bucket.
3659 *
3660 * If this ocfs2_xattr_header covers more than one hash value, find a
3661 * place where the hash value changes. Try to find the most even split.
3662 * The most common case is that all entries have different hash values,
3663 * and the first check we make will find a place to split.
3664 */
3665static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
3666{
3667 struct ocfs2_xattr_entry *entries = xh->xh_entries;
3668 int count = le16_to_cpu(xh->xh_count);
3669 int delta, middle = count / 2;
3670
3671 /*
3672 * We start at the middle. Each step gets farther away in both
3673 * directions. We therefore hit the change in hash value
3674 * nearest to the middle. Note that this loop does not execute for
3675 * count < 2.
3676 */
3677 for (delta = 0; delta < middle; delta++) {
3678 /* Let's check delta earlier than middle */
3679 if (cmp_xe(&entries[middle - delta - 1],
3680 &entries[middle - delta]))
3681 return middle - delta;
3682
3683 /* For even counts, don't walk off the end */
3684 if ((middle + delta + 1) == count)
3685 continue;
3686
3687 /* Now try delta past middle */
3688 if (cmp_xe(&entries[middle + delta],
3689 &entries[middle + delta + 1]))
3690 return middle + delta + 1;
3691 }
3692
3693 /* Every entry had the same hash */
3694 return count;
3695}
3696
3697/*
3698 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
01225596 3699 * first_hash will record the 1st hash of the new bucket.
80bcaf34
TM		 3700 *
3701 * Normally half of the xattrs will be moved. But we have to make
3702 * sure that the xattrs with the same hash value are stored in the
3703 * same bucket. If all the xattrs in this bucket have the same hash
3704 * value, the new bucket will be initialized as an empty one and the
3705 * first_hash will be initialized as (hash_value+1).
01225596 3706 */
80bcaf34
TM		 3707static int ocfs2_divide_xattr_bucket(struct inode *inode,
3708 handle_t *handle,
3709 u64 blk,
3710 u64 new_blk,
3711 u32 *first_hash,
3712 int new_bucket_head)
01225596
TM		 3713{
3714 int ret, i;
80bcaf34 3715 int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
ba937127 3716 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 3717 struct ocfs2_xattr_header *xh;
3718 struct ocfs2_xattr_entry *xe;
3719 int blocksize = inode->i_sb->s_blocksize;
3720
80bcaf34 3721 mlog(0, "move some of xattrs from bucket %llu to %llu\n",
de29c085 3722 (unsigned long long)blk, (unsigned long long)new_blk);
01225596 3723
ba937127
JB		 3724 s_bucket = ocfs2_xattr_bucket_new(inode);
3725 t_bucket = ocfs2_xattr_bucket_new(inode);
3726 if (!s_bucket || !t_bucket) {
3727 ret = -ENOMEM;
3728 mlog_errno(ret);
3729 goto out;
3730 }
01225596 3731
ba937127 3732 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
01225596
TM		 3733 if (ret) {
3734 mlog_errno(ret);
3735 goto out;
3736 }
3737
ba937127 3738 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
1224be02 3739 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 3740 if (ret) {
3741 mlog_errno(ret);
3742 goto out;
3743 }
3744
784b816a
JB		 3745 /*
3746 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
3747 * there's no need to read it.
3748 */
ba937127 3749 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk);
01225596
TM		 3750 if (ret) {
3751 mlog_errno(ret);
3752 goto out;
3753 }
3754
2b656c1d
JB		 3755 /*
3756 * Hey, if we're overwriting t_bucket, what difference does
3757 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
3758 * same part of ocfs2_cp_xattr_bucket().
3759 */
ba937127 3760 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 3761 new_bucket_head ?
3762 OCFS2_JOURNAL_ACCESS_CREATE :
3763 OCFS2_JOURNAL_ACCESS_WRITE);
3764 if (ret) {
3765 mlog_errno(ret);
3766 goto out;
01225596
TM		 3767 }
3768
ba937127 3769 xh = bucket_xh(s_bucket);
80bcaf34
TM		 3770 count = le16_to_cpu(xh->xh_count);
3771 start = ocfs2_xattr_find_divide_pos(xh);
3772
3773 if (start == count) {
3774 xe = &xh->xh_entries[start-1];
3775
3776 /*
3777 * initialized a new empty bucket here.
3778 * The hash value is set as one larger than
3779 * that of the last entry in the previous bucket.
3780 */
ba937127
JB		 3781 for (i = 0; i < t_bucket->bu_blocks; i++)
3782 memset(bucket_block(t_bucket, i), 0, blocksize);
80bcaf34 3783
ba937127 3784 xh = bucket_xh(t_bucket);
80bcaf34
TM		 3785 xh->xh_free_start = cpu_to_le16(blocksize);
3786 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
3787 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
3788
3789 goto set_num_buckets;
3790 }
3791
01225596 3792 /* copy the whole bucket to the new first. */
ba937127 3793 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
01225596
TM		 3794
3795 /* update the new bucket. */
ba937127 3796 xh = bucket_xh(t_bucket);
01225596
TM		 3797
3798 /*
3799 * Calculate the total name/value len and xh_free_start for
3800 * the old bucket first.
3801 */
3802 name_offset = OCFS2_XATTR_BUCKET_SIZE;
3803 name_value_len = 0;
3804 for (i = 0; i < start; i++) {
3805 xe = &xh->xh_entries[i];
3806 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3807 if (ocfs2_xattr_is_local(xe))
3808 xe_len +=
3809 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3810 else
3811 xe_len += OCFS2_XATTR_ROOT_SIZE;
3812 name_value_len += xe_len;
3813 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
3814 name_offset = le16_to_cpu(xe->xe_name_offset);
3815 }
3816
3817 /*
3818 * Now begin the modification to the new bucket.
3819 *
3820 * In the new bucket, We just move the xattr entry to the beginning
3821 * and don't touch the name/value. So there will be some holes in the
3822 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
3823 * called.
3824 */
3825 xe = &xh->xh_entries[start];
3826 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
3827 mlog(0, "mv xattr entry len %d from %d to %d\n", len,
ff1ec20e
MF		 3828 (int)((char *)xe - (char *)xh),
3829 (int)((char *)xh->xh_entries - (char *)xh));
01225596
TM		 3830 memmove((char *)xh->xh_entries, (char *)xe, len);
3831 xe = &xh->xh_entries[count - start];
3832 len = sizeof(struct ocfs2_xattr_entry) * start;
3833 memset((char *)xe, 0, len);
3834
3835 le16_add_cpu(&xh->xh_count, -start);
3836 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
3837
3838 /* Calculate xh_free_start for the new bucket. */
3839 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
3840 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3841 xe = &xh->xh_entries[i];
3842 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3843 if (ocfs2_xattr_is_local(xe))
3844 xe_len +=
3845 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3846 else
3847 xe_len += OCFS2_XATTR_ROOT_SIZE;
3848 if (le16_to_cpu(xe->xe_name_offset) <
3849 le16_to_cpu(xh->xh_free_start))
3850 xh->xh_free_start = xe->xe_name_offset;
3851 }
3852
80bcaf34 3853set_num_buckets:
01225596
TM		 3854 /* set xh->xh_num_buckets for the new xh. */
3855 if (new_bucket_head)
3856 xh->xh_num_buckets = cpu_to_le16(1);
3857 else
3858 xh->xh_num_buckets = 0;
3859
ba937127 3860 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 3861
3862 /* store the first_hash of the new bucket. */
3863 if (first_hash)
3864 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
3865
3866 /*
80bcaf34
TM		 3867 * Now only update the 1st block of the old bucket. If we
3868 * just added a new empty bucket, there is no need to modify
3869 * it.
01225596 3870 */
80bcaf34
TM		 3871 if (start == count)
3872 goto out;
3873
ba937127 3874 xh = bucket_xh(s_bucket);
01225596
TM		 3875 memset(&xh->xh_entries[start], 0,
3876 sizeof(struct ocfs2_xattr_entry) * (count - start));
3877 xh->xh_count = cpu_to_le16(start);
3878 xh->xh_free_start = cpu_to_le16(name_offset);
3879 xh->xh_name_value_len = cpu_to_le16(name_value_len);
3880
ba937127 3881 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
01225596
TM		 3882
3883out:
ba937127
JB		 3884 ocfs2_xattr_bucket_free(s_bucket);
3885 ocfs2_xattr_bucket_free(t_bucket);
01225596
TM		 3886
3887 return ret;
3888}
3889
3890/*
3891 * Copy xattr from one bucket to another bucket.
3892 *
3893 * The caller must make sure that the journal transaction
3894 * has enough space for journaling.
3895 */
3896static int ocfs2_cp_xattr_bucket(struct inode *inode,
3897 handle_t *handle,
3898 u64 s_blkno,
3899 u64 t_blkno,
3900 int t_is_new)
3901{
4980c6da 3902 int ret;
ba937127 3903 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 3904
3905 BUG_ON(s_blkno == t_blkno);
3906
3907 mlog(0, "cp bucket %llu to %llu, target is %d\n",
de29c085
MF		 3908 (unsigned long long)s_blkno, (unsigned long long)t_blkno,
3909 t_is_new);
01225596 3910
ba937127
JB		 3911 s_bucket = ocfs2_xattr_bucket_new(inode);
3912 t_bucket = ocfs2_xattr_bucket_new(inode);
3913 if (!s_bucket || !t_bucket) {
3914 ret = -ENOMEM;
3915 mlog_errno(ret);
3916 goto out;
3917 }
92de109a 3918
ba937127 3919 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
01225596
TM		 3920 if (ret)
3921 goto out;
3922
784b816a
JB		 3923 /*
3924 * Even if !t_is_new, we're overwriting t_bucket. Thus,
3925 * there's no need to read it.
3926 */
ba937127 3927 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno);
01225596
TM		 3928 if (ret)
3929 goto out;
3930
2b656c1d
JB		 3931 /*
3932 * Hey, if we're overwriting t_bucket, what difference does
3933 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
874d65af
JB		 3934 * cluster to fill, we came here from
3935 * ocfs2_mv_xattr_buckets(), and it is really new -
3936 * ACCESS_CREATE is required. But we also might have moved data
3937 * out of t_bucket before extending back into it.
3938 * ocfs2_add_new_xattr_bucket() can do this - its call to
3939 * ocfs2_add_new_xattr_cluster() may have created a new extent
2b656c1d
JB		 3940 * and copied out the end of the old extent. Then it re-extends
3941 * the old extent back to create space for new xattrs. That's
3942 * how we get here, and the bucket isn't really new.
3943 */
ba937127 3944 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 3945 t_is_new ?
3946 OCFS2_JOURNAL_ACCESS_CREATE :
3947 OCFS2_JOURNAL_ACCESS_WRITE);
3948 if (ret)
3949 goto out;
01225596 3950
ba937127
JB		 3951 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3952 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 3953
3954out:
ba937127
JB		 3955 ocfs2_xattr_bucket_free(t_bucket);
3956 ocfs2_xattr_bucket_free(s_bucket);
01225596
TM		 3957
3958 return ret;
3959}
3960
3961/*
874d65af
JB		 3962 * src_blk points to the start of an existing extent. last_blk points to
3963 * last cluster in that extent. to_blk points to a newly allocated
54ecb6b6
JB		 3964 * extent. We copy the buckets from the cluster at last_blk to the new
3965 * extent. If start_bucket is non-zero, we skip that many buckets before
3966 * we start copying. The new extent's xh_num_buckets gets set to the
3967 * number of buckets we copied. The old extent's xh_num_buckets shrinks
3968 * by the same amount.
01225596 3969 */
54ecb6b6
JB		 3970static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
3971 u64 src_blk, u64 last_blk, u64 to_blk,
3972 unsigned int start_bucket,
3973 u32 *first_hash)
01225596
TM		 3974{
3975 int i, ret, credits;
3976 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
15d60929 3977 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596 3978 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
15d60929 3979 struct ocfs2_xattr_bucket *old_first, *new_first;
01225596 3980
874d65af
JB		 3981 mlog(0, "mv xattrs from cluster %llu to %llu\n",
3982 (unsigned long long)last_blk, (unsigned long long)to_blk);
01225596 3983
54ecb6b6
JB		 3984 BUG_ON(start_bucket >= num_buckets);
3985 if (start_bucket) {
3986 num_buckets -= start_bucket;
3987 last_blk += (start_bucket * blks_per_bucket);
3988 }
3989
15d60929
JB		 3990 /* The first bucket of the original extent */
3991 old_first = ocfs2_xattr_bucket_new(inode);
3992 /* The first bucket of the new extent */
3993 new_first = ocfs2_xattr_bucket_new(inode);
3994 if (!old_first || !new_first) {
3995 ret = -ENOMEM;
3996 mlog_errno(ret);
3997 goto out;
3998 }
3999
874d65af 4000 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
15d60929
JB		 4001 if (ret) {
4002 mlog_errno(ret);
4003 goto out;
4004 }
4005
01225596 4006 /*
54ecb6b6
JB		 4007 * We need to update the first bucket of the old extent and all
4008 * the buckets going to the new extent.
01225596 4009 */
54ecb6b6
JB		 4010 credits = ((num_buckets + 1) * blks_per_bucket) +
4011 handle->h_buffer_credits;
01225596
TM		 4012 ret = ocfs2_extend_trans(handle, credits);
4013 if (ret) {
4014 mlog_errno(ret);
4015 goto out;
4016 }
4017
15d60929
JB		 4018 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4019 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4020 if (ret) {
4021 mlog_errno(ret);
4022 goto out;
4023 }
4024
4025 for (i = 0; i < num_buckets; i++) {
4026 ret = ocfs2_cp_xattr_bucket(inode, handle,
874d65af 4027 last_blk + (i * blks_per_bucket),
15d60929
JB		 4028 to_blk + (i * blks_per_bucket),
4029 1);
01225596
TM		 4030 if (ret) {
4031 mlog_errno(ret);
4032 goto out;
4033 }
01225596
TM		 4034 }
4035
15d60929
JB		 4036 /*
4037 * Get the new bucket ready before we dirty anything
4038 * (This actually shouldn't fail, because we already dirtied
4039 * it once in ocfs2_cp_xattr_bucket()).
4040 */
4041 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4042 if (ret) {
01225596
TM		 4043 mlog_errno(ret);
4044 goto out;
4045 }
15d60929
JB		 4046 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4047 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4048 if (ret) {
4049 mlog_errno(ret);
4050 goto out;
4051 }
4052
15d60929
JB		 4053 /* Now update the headers */
4054 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4055 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
01225596 4056
15d60929
JB		 4057 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4058 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
01225596
TM		 4059
4060 if (first_hash)
15d60929
JB		 4061 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4062
01225596 4063out:
15d60929
JB		 4064 ocfs2_xattr_bucket_free(new_first);
4065 ocfs2_xattr_bucket_free(old_first);
01225596
TM		 4066 return ret;
4067}
4068
4069/*
80bcaf34 4070 * Move some xattrs in this cluster to the new cluster.
01225596
TM		 4071 * This function should only be called when bucket size == cluster size.
4072 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4073 */
80bcaf34
TM		 4074static int ocfs2_divide_xattr_cluster(struct inode *inode,
4075 handle_t *handle,
4076 u64 prev_blk,
4077 u64 new_blk,
4078 u32 *first_hash)
01225596
TM		 4079{
4080 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
85db90e7 4081 int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits;
01225596
TM		 4082
4083 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4084
4085 ret = ocfs2_extend_trans(handle, credits);
4086 if (ret) {
4087 mlog_errno(ret);
4088 return ret;
4089 }
4090
4091 /* Move half of the xattr in start_blk to the next bucket. */
80bcaf34
TM		 4092 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4093 new_blk, first_hash, 1);
01225596
TM		 4094}
4095
4096/*
4097 * Move some xattrs from the old cluster to the new one since they are not
4098 * contiguous in ocfs2 xattr tree.
4099 *
4100 * new_blk starts a new separate cluster, and we will move some xattrs from
4101 * prev_blk to it. v_start will be set as the first name hash value in this
4102 * new cluster so that it can be used as e_cpos during tree insertion and
4103 * don't collide with our original b-tree operations. first_bh and header_bh
4104 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
4105 * to extend the insert bucket.
4106 *
4107 * The problem is how much xattr should we move to the new one and when should
4108 * we update first_bh and header_bh?
4109 * 1. If cluster size > bucket size, that means the previous cluster has more
4110 * than 1 bucket, so just move half nums of bucket into the new cluster and
4111 * update the first_bh and header_bh if the insert bucket has been moved
4112 * to the new cluster.
4113 * 2. If cluster_size == bucket_size:
4114 * a) If the previous extent rec has more than one cluster and the insert
4115 * place isn't in the last cluster, copy the entire last cluster to the
4116 * new one. This time, we don't need to upate the first_bh and header_bh
4117 * since they will not be moved into the new cluster.
4118 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
4119 * the new one. And we set the extend flag to zero if the insert place is
4120 * moved into the new allocated cluster since no extend is needed.
4121 */
4122static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
4123 handle_t *handle,
012ee910
JB		 4124 struct ocfs2_xattr_bucket *first,
4125 struct ocfs2_xattr_bucket *target,
01225596 4126 u64 new_blk,
01225596
TM		 4127 u32 prev_clusters,
4128 u32 *v_start,
4129 int *extend)
4130{
92cf3adf 4131 int ret;
01225596
TM		 4132
4133 mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
012ee910 4134 (unsigned long long)bucket_blkno(first), prev_clusters,
de29c085 4135 (unsigned long long)new_blk);
01225596 4136
41cb8148 4137 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
01225596
TM		 4138 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
4139 handle,
41cb8148 4140 first, target,
01225596 4141 new_blk,
01225596
TM		 4142 prev_clusters,
4143 v_start);
012ee910 4144 if (ret)
41cb8148 4145 mlog_errno(ret);
41cb8148 4146 } else {
92cf3adf
JB		 4147 /* The start of the last cluster in the first extent */
4148 u64 last_blk = bucket_blkno(first) +
4149 ((prev_clusters - 1) *
4150 ocfs2_clusters_to_blocks(inode->i_sb, 1));
01225596 4151
012ee910 4152 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
874d65af 4153 ret = ocfs2_mv_xattr_buckets(inode, handle,
92cf3adf 4154 bucket_blkno(first),
54ecb6b6 4155 last_blk, new_blk, 0,
01225596 4156 v_start);
012ee910
JB		 4157 if (ret)
4158 mlog_errno(ret);
4159 } else {
80bcaf34
TM		 4160 ret = ocfs2_divide_xattr_cluster(inode, handle,
4161 last_blk, new_blk,
4162 v_start);
012ee910
JB		 4163 if (ret)
4164 mlog_errno(ret);
01225596 4165
92cf3adf 4166 if ((bucket_blkno(target) == last_blk) && extend)
01225596
TM		 4167 *extend = 0;
4168 }
4169 }
4170
4171 return ret;
4172}
4173
4174/*
4175 * Add a new cluster for xattr storage.
4176 *
4177 * If the new cluster is contiguous with the previous one, it will be
4178 * appended to the same extent record, and num_clusters will be updated.
4179 * If not, we will insert a new extent for it and move some xattrs in
4180 * the last cluster into the new allocated one.
4181 * We also need to limit the maximum size of a btree leaf, otherwise we'll
4182 * lose the benefits of hashing because we'll have to search large leaves.
4183 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
4184 * if it's bigger).
4185 *
4186 * first_bh is the first block of the previous extent rec and header_bh
4187 * indicates the bucket we will insert the new xattrs. They will be updated
4188 * when the header_bh is moved into the new cluster.
4189 */
4190static int ocfs2_add_new_xattr_cluster(struct inode *inode,
4191 struct buffer_head *root_bh,
ed29c0ca
JB		 4192 struct ocfs2_xattr_bucket *first,
4193 struct ocfs2_xattr_bucket *target,
01225596
TM		 4194 u32 *num_clusters,
4195 u32 prev_cpos,
78f30c31
TM		 4196 int *extend,
4197 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4198{
85db90e7 4199 int ret;
01225596
TM		 4200 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
4201 u32 prev_clusters = *num_clusters;
4202 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
4203 u64 block;
85db90e7 4204 handle_t *handle = ctxt->handle;
01225596 4205 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
f99b9b7c 4206 struct ocfs2_extent_tree et;
01225596
TM		 4207
4208 mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
4209 "previous xattr blkno = %llu\n",
4210 (unsigned long long)OCFS2_I(inode)->ip_blkno,
ed29c0ca 4211 prev_cpos, (unsigned long long)bucket_blkno(first));
01225596 4212
8d6220d6 4213 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
f99b9b7c 4214
01225596
TM		 4215 ret = ocfs2_journal_access(handle, inode, root_bh,
4216 OCFS2_JOURNAL_ACCESS_WRITE);
4217 if (ret < 0) {
4218 mlog_errno(ret);
4219 goto leave;
4220 }
4221
78f30c31 4222 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
01225596
TM		 4223 clusters_to_add, &bit_off, &num_bits);
4224 if (ret < 0) {
4225 if (ret != -ENOSPC)
4226 mlog_errno(ret);
4227 goto leave;
4228 }
4229
4230 BUG_ON(num_bits > clusters_to_add);
4231
4232 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
4233 mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n",
4234 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
4235
ed29c0ca 4236 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
01225596
TM		 4237 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
4238 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
4239 /*
4240 * If this cluster is contiguous with the old one and
4241 * adding this new cluster, we don't surpass the limit of
4242 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
4243 * initialized and used like other buckets in the previous
4244 * cluster.
4245 * So add it as a contiguous one. The caller will handle
4246 * its init process.
4247 */
4248 v_start = prev_cpos + prev_clusters;
4249 *num_clusters = prev_clusters + num_bits;
4250 mlog(0, "Add contiguous %u clusters to previous extent rec.\n",
4251 num_bits);
4252 } else {
4253 ret = ocfs2_adjust_xattr_cross_cluster(inode,
4254 handle,
012ee910
JB		 4255 first,
4256 target,
01225596 4257 block,
01225596
TM		 4258 prev_clusters,
4259 &v_start,
4260 extend);
4261 if (ret) {
4262 mlog_errno(ret);
4263 goto leave;
4264 }
4265 }
4266
4267 mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
de29c085 4268 num_bits, (unsigned long long)block, v_start);
f99b9b7c 4269 ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
78f30c31 4270 num_bits, 0, ctxt->meta_ac);
01225596
TM		 4271 if (ret < 0) {
4272 mlog_errno(ret);
4273 goto leave;
4274 }
4275
4276 ret = ocfs2_journal_dirty(handle, root_bh);
85db90e7 4277 if (ret < 0)
01225596 4278 mlog_errno(ret);
01225596
TM		 4279
4280leave:
01225596
TM		 4281 return ret;
4282}
4283
4284/*
92de109a
JB		 4285 * We are given an extent. 'first' is the bucket at the very front of
4286 * the extent. The extent has space for an additional bucket past
4287 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
4288 * of the target bucket. We wish to shift every bucket past the target
4289 * down one, filling in that additional space. When we get back to the
4290 * target, we split the target between itself and the now-empty bucket
4291 * at target+1 (aka, target_blkno + blks_per_bucket).
01225596
TM		 4292 */
4293static int ocfs2_extend_xattr_bucket(struct inode *inode,
85db90e7 4294 handle_t *handle,
92de109a
JB		 4295 struct ocfs2_xattr_bucket *first,
4296 u64 target_blk,
01225596
TM		 4297 u32 num_clusters)
4298{
4299 int ret, credits;
4300 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4301 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
92de109a
JB		 4302 u64 end_blk;
4303 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
01225596
TM		 4304
4305 mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
92de109a
JB		 4306 "from %llu, len = %u\n", (unsigned long long)target_blk,
4307 (unsigned long long)bucket_blkno(first), num_clusters);
01225596 4308
92de109a
JB		 4309 /* The extent must have room for an additional bucket */
4310 BUG_ON(new_bucket >=
4311 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
01225596 4312
92de109a
JB		 4313 /* end_blk points to the last existing bucket */
4314 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
01225596
TM		 4315
4316 /*
92de109a
JB		 4317 * end_blk is the start of the last existing bucket.
4318 * Thus, (end_blk - target_blk) covers the target bucket and
4319 * every bucket after it up to, but not including, the last
4320 * existing bucket. Then we add the last existing bucket, the
4321 * new bucket, and the first bucket (3 * blk_per_bucket).
01225596 4322 */
92de109a 4323 credits = (end_blk - target_blk) + (3 * blk_per_bucket) +
85db90e7
TM		 4324 handle->h_buffer_credits;
4325 ret = ocfs2_extend_trans(handle, credits);
4326 if (ret) {
01225596
TM		 4327 mlog_errno(ret);
4328 goto out;
4329 }
4330
92de109a
JB		 4331 ret = ocfs2_xattr_bucket_journal_access(handle, first,
4332 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4333 if (ret) {
4334 mlog_errno(ret);
85db90e7 4335 goto out;
01225596
TM		 4336 }
4337
92de109a 4338 while (end_blk != target_blk) {
01225596
TM		 4339 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
4340 end_blk + blk_per_bucket, 0);
4341 if (ret)
85db90e7 4342 goto out;
01225596
TM		 4343 end_blk -= blk_per_bucket;
4344 }
4345
92de109a
JB		 4346 /* Move half of the xattr in target_blkno to the next bucket. */
4347 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
4348 target_blk + blk_per_bucket, NULL, 0);
01225596 4349
92de109a
JB		 4350 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
4351 ocfs2_xattr_bucket_journal_dirty(handle, first);
01225596 4352
01225596
TM		 4353out:
4354 return ret;
4355}
4356
4357/*
91f2033f
JB		 4358 * Add new xattr bucket in an extent record and adjust the buckets
4359 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
4360 * bucket we want to insert into.
01225596 4361 *
91f2033f
JB		 4362 * In the easy case, we will move all the buckets after target down by
4363 * one. Half of target's xattrs will be moved to the next bucket.
4364 *
4365 * If current cluster is full, we'll allocate a new one. This may not
4366 * be contiguous. The underlying calls will make sure that there is
4367 * space for the insert, shifting buckets around if necessary.
4368 * 'target' may be moved by those calls.
01225596
TM		 4369 */
4370static int ocfs2_add_new_xattr_bucket(struct inode *inode,
4371 struct buffer_head *xb_bh,
91f2033f 4372 struct ocfs2_xattr_bucket *target,
78f30c31 4373 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4374{
01225596
TM		 4375 struct ocfs2_xattr_block *xb =
4376 (struct ocfs2_xattr_block *)xb_bh->b_data;
4377 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
4378 struct ocfs2_extent_list *el = &xb_root->xt_list;
91f2033f
JB		 4379 u32 name_hash =
4380 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
ed29c0ca 4381 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
01225596
TM		 4382 int ret, num_buckets, extend = 1;
4383 u64 p_blkno;
4384 u32 e_cpos, num_clusters;
92de109a 4385 /* The bucket at the front of the extent */
91f2033f 4386 struct ocfs2_xattr_bucket *first;
01225596 4387
91f2033f
JB		 4388 mlog(0, "Add new xattr bucket starting from %llu\n",
4389 (unsigned long long)bucket_blkno(target));
01225596 4390
ed29c0ca 4391 /* The first bucket of the original extent */
92de109a 4392 first = ocfs2_xattr_bucket_new(inode);
91f2033f 4393 if (!first) {
92de109a
JB		 4394 ret = -ENOMEM;
4395 mlog_errno(ret);
4396 goto out;
4397 }
4398
01225596
TM		 4399 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
4400 &num_clusters, el);
4401 if (ret) {
4402 mlog_errno(ret);
4403 goto out;
4404 }
4405
ed29c0ca 4406 ret = ocfs2_read_xattr_bucket(first, p_blkno);
01225596
TM		 4407 if (ret) {
4408 mlog_errno(ret);
4409 goto out;
4410 }
4411
ed29c0ca
JB		 4412 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
4413 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
4414 /*
4415 * This can move first+target if the target bucket moves
4416 * to the new extent.
4417 */
01225596
TM		 4418 ret = ocfs2_add_new_xattr_cluster(inode,
4419 xb_bh,
ed29c0ca
JB		 4420 first,
4421 target,
01225596
TM		 4422 &num_clusters,
4423 e_cpos,
78f30c31
TM		 4424 &extend,
4425 ctxt);
01225596
TM		 4426 if (ret) {
4427 mlog_errno(ret);
4428 goto out;
4429 }
4430 }
4431
92de109a 4432 if (extend) {
01225596 4433 ret = ocfs2_extend_xattr_bucket(inode,
85db90e7 4434 ctxt->handle,
ed29c0ca
JB		 4435 first,
4436 bucket_blkno(target),
01225596 4437 num_clusters);
92de109a
JB		 4438 if (ret)
4439 mlog_errno(ret);
4440 }
4441
01225596 4442out:
92de109a 4443 ocfs2_xattr_bucket_free(first);
ed29c0ca 4444
01225596
TM		 4445 return ret;
4446}
4447
4448static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
4449 struct ocfs2_xattr_bucket *bucket,
4450 int offs)
4451{
4452 int block_off = offs >> inode->i_sb->s_blocksize_bits;
4453
4454 offs = offs % inode->i_sb->s_blocksize;
51def39f 4455 return bucket_block(bucket, block_off) + offs;
01225596
TM		 4456}
4457
4458/*
4459 * Handle the normal xattr set, including replace, delete and new.
01225596
TM		 4460 *
4461 * Note: "local" indicates the real data's locality. So we can't
4462 * just its bucket locality by its length.
4463 */
4464static void ocfs2_xattr_set_entry_normal(struct inode *inode,
4465 struct ocfs2_xattr_info *xi,
4466 struct ocfs2_xattr_search *xs,
4467 u32 name_hash,
5a095611 4468 int local)
01225596
TM		 4469{
4470 struct ocfs2_xattr_entry *last, *xe;
4471 int name_len = strlen(xi->name);
4472 struct ocfs2_xattr_header *xh = xs->header;
4473 u16 count = le16_to_cpu(xh->xh_count), start;
4474 size_t blocksize = inode->i_sb->s_blocksize;
4475 char *val;
4476 size_t offs, size, new_size;
4477
4478 last = &xh->xh_entries[count];
4479 if (!xs->not_found) {
4480 xe = xs->here;
4481 offs = le16_to_cpu(xe->xe_name_offset);
4482 if (ocfs2_xattr_is_local(xe))
4483 size = OCFS2_XATTR_SIZE(name_len) +
4484 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
4485 else
4486 size = OCFS2_XATTR_SIZE(name_len) +
4487 OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
4488
4489 /*
4490 * If the new value will be stored outside, xi->value has been
4491 * initalized as an empty ocfs2_xattr_value_root, and the same
4492 * goes with xi->value_len, so we can set new_size safely here.
4493 * See ocfs2_xattr_set_in_bucket.
4494 */
4495 new_size = OCFS2_XATTR_SIZE(name_len) +
4496 OCFS2_XATTR_SIZE(xi->value_len);
4497
4498 le16_add_cpu(&xh->xh_name_value_len, -size);
4499 if (xi->value) {
4500 if (new_size > size)
4501 goto set_new_name_value;
4502
4503 /* Now replace the old value with new one. */
4504 if (local)
4505 xe->xe_value_size = cpu_to_le64(xi->value_len);
4506 else
4507 xe->xe_value_size = 0;
4508
4509 val = ocfs2_xattr_bucket_get_val(inode,
ba937127 4510 xs->bucket, offs);
01225596
TM		 4511 memset(val + OCFS2_XATTR_SIZE(name_len), 0,
4512 size - OCFS2_XATTR_SIZE(name_len));
4513 if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
4514 memcpy(val + OCFS2_XATTR_SIZE(name_len),
4515 xi->value, xi->value_len);
4516
4517 le16_add_cpu(&xh->xh_name_value_len, new_size);
4518 ocfs2_xattr_set_local(xe, local);
4519 return;
4520 } else {
5a095611
TM		 4521 /*
4522 * Remove the old entry if there is more than one.
4523 * We don't remove the last entry so that we can
4524 * use it to indicate the hash value of the empty
4525 * bucket.
4526 */
01225596 4527 last -= 1;
01225596 4528 le16_add_cpu(&xh->xh_count, -1);
5a095611
TM		 4529 if (xh->xh_count) {
4530 memmove(xe, xe + 1,
4531 (void *)last - (void *)xe);
4532 memset(last, 0,
4533 sizeof(struct ocfs2_xattr_entry));
4534 } else
4535 xh->xh_free_start =
4536 cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4537
01225596
TM		 4538 return;
4539 }
4540 } else {
4541 /* find a new entry for insert. */
4542 int low = 0, high = count - 1, tmp;
4543 struct ocfs2_xattr_entry *tmp_xe;
4544
5a095611 4545 while (low <= high && count) {
01225596
TM		 4546 tmp = (low + high) / 2;
4547 tmp_xe = &xh->xh_entries[tmp];
4548
4549 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
4550 low = tmp + 1;
4551 else if (name_hash <
4552 le32_to_cpu(tmp_xe->xe_name_hash))
4553 high = tmp - 1;
06b240d8
TM		 4554 else {
4555 low = tmp;
01225596 4556 break;
06b240d8 4557 }
01225596
TM		 4558 }
4559
4560 xe = &xh->xh_entries[low];
4561 if (low != count)
4562 memmove(xe + 1, xe, (void *)last - (void *)xe);
4563
4564 le16_add_cpu(&xh->xh_count, 1);
4565 memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
4566 xe->xe_name_hash = cpu_to_le32(name_hash);
4567 xe->xe_name_len = name_len;
4568 ocfs2_xattr_set_type(xe, xi->name_index);
4569 }
4570
4571set_new_name_value:
4572 /* Insert the new name+value. */
4573 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
4574
4575 /*
4576 * We must make sure that the name/value pair
4577 * exists in the same block.
4578 */
4579 offs = le16_to_cpu(xh->xh_free_start);
4580 start = offs - size;
4581
4582 if (start >> inode->i_sb->s_blocksize_bits !=
4583 (offs - 1) >> inode->i_sb->s_blocksize_bits) {
4584 offs = offs - offs % blocksize;
4585 xh->xh_free_start = cpu_to_le16(offs);
4586 }
4587
ba937127 4588 val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
01225596
TM		 4589 xe->xe_name_offset = cpu_to_le16(offs - size);
4590
4591 memset(val, 0, size);
4592 memcpy(val, xi->name, name_len);
4593 memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
4594
4595 xe->xe_value_size = cpu_to_le64(xi->value_len);
4596 ocfs2_xattr_set_local(xe, local);
4597 xs->here = xe;
4598 le16_add_cpu(&xh->xh_free_start, -size);
4599 le16_add_cpu(&xh->xh_name_value_len, size);
4600
4601 return;
4602}
4603
01225596
TM		 4604/*
4605 * Set the xattr entry in the specified bucket.
4606 * The bucket is indicated by xs->bucket and it should have the enough
4607 * space for the xattr insertion.
4608 */
4609static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
85db90e7 4610 handle_t *handle,
01225596
TM		 4611 struct ocfs2_xattr_info *xi,
4612 struct ocfs2_xattr_search *xs,
4613 u32 name_hash,
5a095611 4614 int local)
01225596 4615{
1224be02 4616 int ret;
02dbf38d 4617 u64 blkno;
01225596 4618
ff1ec20e
MF		 4619 mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
4620 (unsigned long)xi->value_len, xi->name_index,
ba937127 4621 (unsigned long long)bucket_blkno(xs->bucket));
01225596 4622
ba937127 4623 if (!xs->bucket->bu_bhs[1]) {
02dbf38d
JB		 4624 blkno = bucket_blkno(xs->bucket);
4625 ocfs2_xattr_bucket_relse(xs->bucket);
4626 ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
01225596
TM		 4627 if (ret) {
4628 mlog_errno(ret);
4629 goto out;
4630 }
4631 }
4632
ba937127 4633 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
1224be02
JB		 4634 OCFS2_JOURNAL_ACCESS_WRITE);
4635 if (ret < 0) {
4636 mlog_errno(ret);
4637 goto out;
01225596
TM		 4638 }
4639
5a095611 4640 ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
ba937127 4641 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 4642
01225596 4643out:
01225596
TM		 4644 return ret;
4645}
4646
01225596
TM		 4647/*
4648 * Truncate the specified xe_off entry in xattr bucket.
4649 * bucket is indicated by header_bh and len is the new length.
4650 * Both the ocfs2_xattr_value_root and the entry will be updated here.
4651 *
4652 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
4653 */
4654static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
548b0f22 4655 struct ocfs2_xattr_bucket *bucket,
01225596 4656 int xe_off,
78f30c31
TM		 4657 int len,
4658 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4659{
4660 int ret, offset;
4661 u64 value_blk;
01225596 4662 struct ocfs2_xattr_entry *xe;
548b0f22 4663 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 4664 size_t blocksize = inode->i_sb->s_blocksize;
b3e5d379
JB		 4665 struct ocfs2_xattr_value_buf vb = {
4666 .vb_access = ocfs2_journal_access,
4667 };
01225596
TM		 4668
4669 xe = &xh->xh_entries[xe_off];
4670
4671 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
4672
4673 offset = le16_to_cpu(xe->xe_name_offset) +
4674 OCFS2_XATTR_SIZE(xe->xe_name_len);
4675
4676 value_blk = offset / blocksize;
4677
4678 /* We don't allow ocfs2_xattr_value to be stored in different block. */
4679 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
01225596 4680
b3e5d379
JB		 4681 vb.vb_bh = bucket->bu_bhs[value_blk];
4682 BUG_ON(!vb.vb_bh);
01225596 4683
b3e5d379
JB		 4684 vb.vb_xv = (struct ocfs2_xattr_value_root *)
4685 (vb.vb_bh->b_data + offset % blocksize);
01225596 4686
548b0f22
JB		 4687 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
4688 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4689 if (ret) {
4690 mlog_errno(ret);
4691 goto out;
4692 }
4693
548b0f22
JB		 4694 /*
4695 * From here on out we have to dirty the bucket. The generic
4696 * value calls only modify one of the bucket's bhs, but we need
4697 * to send the bucket at once. So if they error, they *could* have
4698 * modified something. We have to assume they did, and dirty
4699 * the whole bucket. This leaves us in a consistent state.
4700 */
4701 mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n",
4702 xe_off, (unsigned long long)bucket_blkno(bucket), len);
b3e5d379 4703 ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
01225596
TM		 4704 if (ret) {
4705 mlog_errno(ret);
548b0f22 4706 goto out_dirty;
01225596
TM		 4707 }
4708
548b0f22
JB		 4709 xe->xe_value_size = cpu_to_le64(len);
4710
4711out_dirty:
4712 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
4713
01225596 4714out:
01225596
TM		 4715 return ret;
4716}
4717
4718static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
78f30c31
TM		 4719 struct ocfs2_xattr_search *xs,
4720 int len,
4721 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4722{
4723 int ret, offset;
4724 struct ocfs2_xattr_entry *xe = xs->here;
4725 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
4726
ba937127 4727 BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
01225596
TM		 4728
4729 offset = xe - xh->xh_entries;
548b0f22 4730 ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
78f30c31 4731 offset, len, ctxt);
01225596
TM		 4732 if (ret)
4733 mlog_errno(ret);
4734
4735 return ret;
4736}
4737
4738static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
85db90e7 4739 handle_t *handle,
01225596
TM		 4740 struct ocfs2_xattr_search *xs,
4741 char *val,
4742 int value_len)
4743{
4744 int offset;
4745 struct ocfs2_xattr_value_root *xv;
4746 struct ocfs2_xattr_entry *xe = xs->here;
4747
4748 BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
4749
4750 offset = le16_to_cpu(xe->xe_name_offset) +
4751 OCFS2_XATTR_SIZE(xe->xe_name_len);
4752
4753 xv = (struct ocfs2_xattr_value_root *)(xs->base + offset);
4754
85db90e7
TM		 4755 return __ocfs2_xattr_set_value_outside(inode, handle,
4756 xv, val, value_len);
01225596
TM		 4757}
4758
01225596
TM		 4759static int ocfs2_rm_xattr_cluster(struct inode *inode,
4760 struct buffer_head *root_bh,
4761 u64 blkno,
4762 u32 cpos,
4763 u32 len)
4764{
4765 int ret;
4766 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4767 struct inode *tl_inode = osb->osb_tl_inode;
4768 handle_t *handle;
4769 struct ocfs2_xattr_block *xb =
4770 (struct ocfs2_xattr_block *)root_bh->b_data;
01225596
TM		 4771 struct ocfs2_alloc_context *meta_ac = NULL;
4772 struct ocfs2_cached_dealloc_ctxt dealloc;
f99b9b7c
JB		 4773 struct ocfs2_extent_tree et;
4774
8d6220d6 4775 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
01225596
TM		 4776
4777 ocfs2_init_dealloc_ctxt(&dealloc);
4778
4779 mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n",
4780 cpos, len, (unsigned long long)blkno);
4781
4782 ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len);
4783
f99b9b7c 4784 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
01225596
TM		 4785 if (ret) {
4786 mlog_errno(ret);
4787 return ret;
4788 }
4789
4790 mutex_lock(&tl_inode->i_mutex);
4791
4792 if (ocfs2_truncate_log_needs_flush(osb)) {
4793 ret = __ocfs2_flush_truncate_log(osb);
4794 if (ret < 0) {
4795 mlog_errno(ret);
4796 goto out;
4797 }
4798 }
4799
a90714c1 4800 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
d3264799 4801 if (IS_ERR(handle)) {
01225596
TM		 4802 ret = -ENOMEM;
4803 mlog_errno(ret);
4804 goto out;
4805 }
4806
4807 ret = ocfs2_journal_access(handle, inode, root_bh,
4808 OCFS2_JOURNAL_ACCESS_WRITE);
4809 if (ret) {
4810 mlog_errno(ret);
4811 goto out_commit;
4812 }
4813
f99b9b7c
JB		 4814 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
4815 &dealloc);
01225596
TM		 4816 if (ret) {
4817 mlog_errno(ret);
4818 goto out_commit;
4819 }
4820
4821 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
4822
4823 ret = ocfs2_journal_dirty(handle, root_bh);
4824 if (ret) {
4825 mlog_errno(ret);
4826 goto out_commit;
4827 }
4828
4829 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
4830 if (ret)
4831 mlog_errno(ret);
4832
4833out_commit:
4834 ocfs2_commit_trans(osb, handle);
4835out:
4836 ocfs2_schedule_truncate_log_flush(osb, 1);
4837
4838 mutex_unlock(&tl_inode->i_mutex);
4839
4840 if (meta_ac)
4841 ocfs2_free_alloc_context(meta_ac);
4842
4843 ocfs2_run_deallocs(osb, &dealloc);
4844
4845 return ret;
4846}
4847
01225596 4848static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
85db90e7 4849 handle_t *handle,
01225596
TM		 4850 struct ocfs2_xattr_search *xs)
4851{
ba937127 4852 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
01225596
TM		 4853 struct ocfs2_xattr_entry *last = &xh->xh_entries[
4854 le16_to_cpu(xh->xh_count) - 1];
4855 int ret = 0;
4856
ba937127 4857 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
1224be02 4858 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4859 if (ret) {
4860 mlog_errno(ret);
85db90e7 4861 return;
01225596
TM		 4862 }
4863
4864 /* Remove the old entry. */
4865 memmove(xs->here, xs->here + 1,
4866 (void *)last - (void *)xs->here);
4867 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
4868 le16_add_cpu(&xh->xh_count, -1);
4869
ba937127 4870 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596
TM		 4871}
4872
4873/*
4874 * Set the xattr name/value in the bucket specified in xs.
4875 *
4876 * As the new value in xi may be stored in the bucket or in an outside cluster,
4877 * we divide the whole process into 3 steps:
4878 * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
4879 * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
4880 * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
4881 * 4. If the clusters for the new outside value can't be allocated, we need
4882 * to free the xattr we allocated in set.
4883 */
4884static int ocfs2_xattr_set_in_bucket(struct inode *inode,
4885 struct ocfs2_xattr_info *xi,
78f30c31
TM		 4886 struct ocfs2_xattr_search *xs,
4887 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4888{
5a095611 4889 int ret, local = 1;
01225596
TM		 4890 size_t value_len;
4891 char *val = (char *)xi->value;
4892 struct ocfs2_xattr_entry *xe = xs->here;
2057e5c6
TM		 4893 u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
4894 strlen(xi->name));
01225596
TM		 4895
4896 if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
4897 /*
4898 * We need to truncate the xattr storage first.
4899 *
4900 * If both the old and new value are stored to
4901 * outside block, we only need to truncate
4902 * the storage and then set the value outside.
4903 *
4904 * If the new value should be stored within block,
4905 * we should free all the outside block first and
4906 * the modification to the xattr block will be done
4907 * by following steps.
4908 */
4909 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
4910 value_len = xi->value_len;
4911 else
4912 value_len = 0;
4913
4914 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
78f30c31
TM		 4915 value_len,
4916 ctxt);
01225596
TM		 4917 if (ret)
4918 goto out;
4919
4920 if (value_len)
4921 goto set_value_outside;
4922 }
4923
4924 value_len = xi->value_len;
4925 /* So we have to handle the inside block change now. */
4926 if (value_len > OCFS2_XATTR_INLINE_SIZE) {
4927 /*
4928 * If the new value will be stored outside of block,
4929 * initalize a new empty value root and insert it first.
4930 */
4931 local = 0;
4932 xi->value = &def_xv;
4933 xi->value_len = OCFS2_XATTR_ROOT_SIZE;
4934 }
4935
85db90e7
TM		 4936 ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
4937 name_hash, local);
01225596
TM		 4938 if (ret) {
4939 mlog_errno(ret);
4940 goto out;
4941 }
4942
5a095611
TM		 4943 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
4944 goto out;
01225596 4945
5a095611
TM		 4946 /* allocate the space now for the outside block storage. */
4947 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
78f30c31 4948 value_len, ctxt);
5a095611
TM		 4949 if (ret) {
4950 mlog_errno(ret);
4951
4952 if (xs->not_found) {
4953 /*
4954 * We can't allocate enough clusters for outside
4955 * storage and we have allocated xattr already,
4956 * so need to remove it.
4957 */
85db90e7 4958 ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
01225596 4959 }
01225596
TM		 4960 goto out;
4961 }
4962
4963set_value_outside:
85db90e7
TM		 4964 ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
4965 xs, val, value_len);
01225596
TM		 4966out:
4967 return ret;
4968}
4969
80bcaf34
TM		 4970/*
4971 * check whether the xattr bucket is filled up with the same hash value.
4972 * If we want to insert the xattr with the same hash, return -ENOSPC.
4973 * If we want to insert a xattr with different hash value, go ahead
4974 * and ocfs2_divide_xattr_bucket will handle this.
4975 */
01225596 4976static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
80bcaf34
TM		 4977 struct ocfs2_xattr_bucket *bucket,
4978 const char *name)
01225596 4979{
3e632946 4980 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
80bcaf34
TM		 4981 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
4982
4983 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
4984 return 0;
01225596
TM		 4985
4986 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
4987 xh->xh_entries[0].xe_name_hash) {
4988 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
4989 "hash = %u\n",
9c7759aa 4990 (unsigned long long)bucket_blkno(bucket),
01225596
TM		 4991 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
4992 return -ENOSPC;
4993 }
4994
4995 return 0;
4996}
4997
4998static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
4999 struct ocfs2_xattr_info *xi,
78f30c31
TM		 5000 struct ocfs2_xattr_search *xs,
5001 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 5002{
5003 struct ocfs2_xattr_header *xh;
5004 struct ocfs2_xattr_entry *xe;
5005 u16 count, header_size, xh_free_start;
6dde41d9 5006 int free, max_free, need, old;
01225596
TM		 5007 size_t value_size = 0, name_len = strlen(xi->name);
5008 size_t blocksize = inode->i_sb->s_blocksize;
5009 int ret, allocation = 0;
01225596
TM		 5010
5011 mlog_entry("Set xattr %s in xattr index block\n", xi->name);
5012
5013try_again:
5014 xh = xs->header;
5015 count = le16_to_cpu(xh->xh_count);
5016 xh_free_start = le16_to_cpu(xh->xh_free_start);
5017 header_size = sizeof(struct ocfs2_xattr_header) +
5018 count * sizeof(struct ocfs2_xattr_entry);
5019 max_free = OCFS2_XATTR_BUCKET_SIZE -
5020 le16_to_cpu(xh->xh_name_value_len) - header_size;
5021
5022 mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
5023 "of %u which exceed block size\n",
ba937127 5024 (unsigned long long)bucket_blkno(xs->bucket),
01225596
TM		 5025 header_size);
5026
5027 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
5028 value_size = OCFS2_XATTR_ROOT_SIZE;
5029 else if (xi->value)
5030 value_size = OCFS2_XATTR_SIZE(xi->value_len);
5031
5032 if (xs->not_found)
5033 need = sizeof(struct ocfs2_xattr_entry) +
5034 OCFS2_XATTR_SIZE(name_len) + value_size;
5035 else {
5036 need = value_size + OCFS2_XATTR_SIZE(name_len);
5037
5038 /*
5039 * We only replace the old value if the new length is smaller
5040 * than the old one. Otherwise we will allocate new space in the
5041 * bucket to store it.
5042 */
5043 xe = xs->here;
5044 if (ocfs2_xattr_is_local(xe))
5045 old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
5046 else
5047 old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
5048
5049 if (old >= value_size)
5050 need = 0;
5051 }
5052
5053 free = xh_free_start - header_size;
5054 /*
5055 * We need to make sure the new name/value pair
5056 * can exist in the same block.
5057 */
5058 if (xh_free_start % blocksize < need)
5059 free -= xh_free_start % blocksize;
5060
5061 mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
5062 "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
5063 " %u\n", xs->not_found,
ba937127 5064 (unsigned long long)bucket_blkno(xs->bucket),
01225596
TM		 5065 free, need, max_free, le16_to_cpu(xh->xh_free_start),
5066 le16_to_cpu(xh->xh_name_value_len));
5067
976331d8
TM		 5068 if (free < need ||
5069 (xs->not_found &&
5070 count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
01225596
TM		 5071 if (need <= max_free &&
5072 count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
5073 /*
5074 * We can create the space by defragment. Since only the
5075 * name/value will be moved, the xe shouldn't be changed
5076 * in xs.
5077 */
85db90e7
TM		 5078 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5079 xs->bucket);
01225596
TM		 5080 if (ret) {
5081 mlog_errno(ret);
5082 goto out;
5083 }
5084
5085 xh_free_start = le16_to_cpu(xh->xh_free_start);
5086 free = xh_free_start - header_size;
5087 if (xh_free_start % blocksize < need)
5088 free -= xh_free_start % blocksize;
5089
5090 if (free >= need)
5091 goto xattr_set;
5092
5093 mlog(0, "Can't get enough space for xattr insert by "
5094 "defragment. Need %u bytes, but we have %d, so "
5095 "allocate new bucket for it.\n", need, free);
5096 }
5097
5098 /*
5099 * We have to add new buckets or clusters and one
5100 * allocation should leave us enough space for insert.
5101 */
5102 BUG_ON(allocation);
5103
5104 /*
5105 * We do not allow for overlapping ranges between buckets. And
5106 * the maximum number of collisions we will allow for then is
5107 * one bucket's worth, so check it here whether we need to
5108 * add a new bucket for the insert.
5109 */
80bcaf34 5110 ret = ocfs2_check_xattr_bucket_collision(inode,
ba937127 5111 xs->bucket,
80bcaf34 5112 xi->name);
01225596
TM		 5113 if (ret) {
5114 mlog_errno(ret);
5115 goto out;
5116 }
5117
5118 ret = ocfs2_add_new_xattr_bucket(inode,
5119 xs->xattr_bh,
91f2033f 5120 xs->bucket,
78f30c31 5121 ctxt);
01225596
TM		 5122 if (ret) {
5123 mlog_errno(ret);
5124 goto out;
5125 }
5126
91f2033f
JB		 5127 /*
5128 * ocfs2_add_new_xattr_bucket() will have updated
5129 * xs->bucket if it moved, but it will not have updated
5130 * any of the other search fields. Thus, we drop it and
5131 * re-search. Everything should be cached, so it'll be
5132 * quick.
5133 */
ba937127 5134 ocfs2_xattr_bucket_relse(xs->bucket);
01225596
TM		 5135 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5136 xi->name_index,
5137 xi->name, xs);
5138 if (ret && ret != -ENODATA)
5139 goto out;
5140 xs->not_found = ret;
5141 allocation = 1;
5142 goto try_again;
5143 }
5144
5145xattr_set:
78f30c31 5146 ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
01225596
TM		 5147out:
5148 mlog_exit(ret);
5149 return ret;
5150}
a3944256
TM		 5151
5152static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5153 struct ocfs2_xattr_bucket *bucket,
5154 void *para)
5155{
5156 int ret = 0;
3e632946 5157 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
a3944256
TM		 5158 u16 i;
5159 struct ocfs2_xattr_entry *xe;
78f30c31
TM		 5160 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5161 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
548b0f22
JB		 5162 int credits = ocfs2_remove_extent_credits(osb->sb) +
5163 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
5164
78f30c31
TM		 5165
5166 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
a3944256
TM		 5167
5168 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5169 xe = &xh->xh_entries[i];
5170 if (ocfs2_xattr_is_local(xe))
5171 continue;
5172
88c3b062
TM		 5173 ctxt.handle = ocfs2_start_trans(osb, credits);
5174 if (IS_ERR(ctxt.handle)) {
5175 ret = PTR_ERR(ctxt.handle);
5176 mlog_errno(ret);
5177 break;
5178 }
5179
548b0f22 5180 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
78f30c31 5181 i, 0, &ctxt);
88c3b062
TM		 5182
5183 ocfs2_commit_trans(osb, ctxt.handle);
a3944256
TM		 5184 if (ret) {
5185 mlog_errno(ret);
5186 break;
5187 }
5188 }
5189
78f30c31
TM		 5190 ocfs2_schedule_truncate_log_flush(osb, 1);
5191 ocfs2_run_deallocs(osb, &ctxt.dealloc);
a3944256
TM		 5192 return ret;
5193}
5194
5195static int ocfs2_delete_xattr_index_block(struct inode *inode,
5196 struct buffer_head *xb_bh)
5197{
5198 struct ocfs2_xattr_block *xb =
5199 (struct ocfs2_xattr_block *)xb_bh->b_data;
5200 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
5201 int ret = 0;
5202 u32 name_hash = UINT_MAX, e_cpos, num_clusters;
5203 u64 p_blkno;
5204
5205 if (le16_to_cpu(el->l_next_free_rec) == 0)
5206 return 0;
5207
5208 while (name_hash > 0) {
5209 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
5210 &e_cpos, &num_clusters, el);
5211 if (ret) {
5212 mlog_errno(ret);
5213 goto out;
5214 }
5215
5216 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
5217 ocfs2_delete_xattr_in_bucket,
5218 NULL);
5219 if (ret) {
5220 mlog_errno(ret);
5221 goto out;
5222 }
5223
5224 ret = ocfs2_rm_xattr_cluster(inode, xb_bh,
5225 p_blkno, e_cpos, num_clusters);
5226 if (ret) {
5227 mlog_errno(ret);
5228 break;
5229 }
5230
5231 if (e_cpos == 0)
5232 break;
5233
5234 name_hash = e_cpos - 1;
5235 }
5236
5237out:
5238 return ret;
5239}
99219aea 5240
923f7f31
TY		 5241/*
5242 * 'security' attributes support
5243 */
5244static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
5245 size_t list_size, const char *name,
5246 size_t name_len)
5247{
5248 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
5249 const size_t total_len = prefix_len + name_len + 1;
5250
5251 if (list && total_len <= list_size) {
5252 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
5253 memcpy(list + prefix_len, name, name_len);
5254 list[prefix_len + name_len] = '\0';
5255 }
5256 return total_len;
5257}
5258
5259static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
5260 void *buffer, size_t size)
5261{
5262 if (strcmp(name, "") == 0)
5263 return -EINVAL;
5264 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
5265 buffer, size);
5266}
5267
5268static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
5269 const void *value, size_t size, int flags)
5270{
5271 if (strcmp(name, "") == 0)
5272 return -EINVAL;
5273
5274 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
5275 size, flags);
5276}
5277
534eaddd
TY		 5278int ocfs2_init_security_get(struct inode *inode,
5279 struct inode *dir,
5280 struct ocfs2_security_xattr_info *si)
5281{
5282 return security_inode_init_security(inode, dir, &si->name, &si->value,
5283 &si->value_len);
5284}
5285
5286int ocfs2_init_security_set(handle_t *handle,
5287 struct inode *inode,
5288 struct buffer_head *di_bh,
5289 struct ocfs2_security_xattr_info *si,
5290 struct ocfs2_alloc_context *xattr_ac,
5291 struct ocfs2_alloc_context *data_ac)
5292{
5293 return ocfs2_xattr_set_handle(handle, inode, di_bh,
5294 OCFS2_XATTR_INDEX_SECURITY,
5295 si->name, si->value, si->value_len, 0,
5296 xattr_ac, data_ac);
5297}
5298
923f7f31
TY		 5299struct xattr_handler ocfs2_xattr_security_handler = {
5300 .prefix = XATTR_SECURITY_PREFIX,
5301 .list = ocfs2_xattr_security_list,
5302 .get = ocfs2_xattr_security_get,
5303 .set = ocfs2_xattr_security_set,
5304};
5305
99219aea
MF		 5306/*
5307 * 'trusted' attributes support
5308 */
99219aea
MF		 5309static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
5310 size_t list_size, const char *name,
5311 size_t name_len)
5312{
ceb1eba3 5313 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
99219aea
MF		 5314 const size_t total_len = prefix_len + name_len + 1;
5315
5316 if (list && total_len <= list_size) {
5317 memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
5318 memcpy(list + prefix_len, name, name_len);
5319 list[prefix_len + name_len] = '\0';
5320 }
5321 return total_len;
5322}
5323
5324static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
5325 void *buffer, size_t size)
5326{
5327 if (strcmp(name, "") == 0)
5328 return -EINVAL;
5329 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
5330 buffer, size);
5331}
5332
5333static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
5334 const void *value, size_t size, int flags)
5335{
5336 if (strcmp(name, "") == 0)
5337 return -EINVAL;
5338
5339 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
5340 size, flags);
5341}
5342
5343struct xattr_handler ocfs2_xattr_trusted_handler = {
5344 .prefix = XATTR_TRUSTED_PREFIX,
5345 .list = ocfs2_xattr_trusted_list,
5346 .get = ocfs2_xattr_trusted_get,
5347 .set = ocfs2_xattr_trusted_set,
5348};
5349
99219aea
MF		 5350/*
5351 * 'user' attributes support
5352 */
99219aea
MF		 5353static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
5354 size_t list_size, const char *name,
5355 size_t name_len)
5356{
ceb1eba3 5357 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
99219aea
MF		 5358 const size_t total_len = prefix_len + name_len + 1;
5359 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5360
5361 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5362 return 0;
5363
5364 if (list && total_len <= list_size) {
5365 memcpy(list, XATTR_USER_PREFIX, prefix_len);
5366 memcpy(list + prefix_len, name, name_len);
5367 list[prefix_len + name_len] = '\0';
5368 }
5369 return total_len;
5370}
5371
5372static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
5373 void *buffer, size_t size)
5374{
5375 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5376
5377 if (strcmp(name, "") == 0)
5378 return -EINVAL;
5379 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5380 return -EOPNOTSUPP;
5381 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
5382 buffer, size);
5383}
5384
5385static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
5386 const void *value, size_t size, int flags)
5387{
5388 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5389
5390 if (strcmp(name, "") == 0)
5391 return -EINVAL;
5392 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5393 return -EOPNOTSUPP;
5394
5395 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
5396 size, flags);
5397}
5398
5399struct xattr_handler ocfs2_xattr_user_handler = {
5400 .prefix = XATTR_USER_PREFIX,
5401 .list = ocfs2_xattr_user_list,
5402 .get = ocfs2_xattr_user_get,
5403 .set = ocfs2_xattr_user_set,
5404};
Linux kernel - Deliverables
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