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[linux-2.6-block.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*/
0e445b6f
TY		 493 if (si->value_len > OCFS2_XATTR_INLINE_SIZE) {
494 int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
495 si->value_len);
496
497 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
498 new_clusters);
499 *want_clusters += new_clusters;
500 }
534eaddd
TY		 501 return ret;
502}
503
89c38bd0
TY		 504int ocfs2_calc_xattr_init(struct inode *dir,
505 struct buffer_head *dir_bh,
506 int mode,
507 struct ocfs2_security_xattr_info *si,
508 int *want_clusters,
509 int *xattr_credits,
510 struct ocfs2_alloc_context **xattr_ac)
511{
512 int ret = 0;
513 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
0e445b6f 514 int s_size = 0, a_size = 0, acl_len = 0, new_clusters;
89c38bd0
TY		 515
516 if (si->enable)
517 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
518 si->value_len);
519
520 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
521 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
522 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
523 "", NULL, 0);
524 if (acl_len > 0) {
525 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
526 if (S_ISDIR(mode))
527 a_size <<= 1;
528 } else if (acl_len != 0 && acl_len != -ENODATA) {
529 mlog_errno(ret);
530 return ret;
531 }
532 }
533
534 if (!(s_size + a_size))
535 return ret;
536
537 /*
538 * The max space of security xattr taken inline is
539 * 256(name) + 80(value) + 16(entry) = 352 bytes,
540 * The max space of acl xattr taken inline is
541 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
542 * when blocksize = 512, may reserve one more cluser for
543 * xattr bucket, otherwise reserve one metadata block
544 * for them is ok.
545 */
546 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
547 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
548 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
549 if (ret) {
550 mlog_errno(ret);
551 return ret;
552 }
553 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
554 }
555
556 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
557 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
558 *want_clusters += 1;
559 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
560 }
561
0e445b6f
TY		 562 /*
563 * reserve credits and clusters for xattrs which has large value
564 * and have to be set outside
565 */
566 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) {
567 new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
568 si->value_len);
569 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
570 new_clusters);
571 *want_clusters += new_clusters;
572 }
89c38bd0
TY		 573 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
574 acl_len > OCFS2_XATTR_INLINE_SIZE) {
0e445b6f
TY		 575 /* for directory, it has DEFAULT and ACCESS two types of acls */
576 new_clusters = (S_ISDIR(mode) ? 2 : 1) *
577 ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
578 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
579 new_clusters);
580 *want_clusters += new_clusters;
89c38bd0
TY		 581 }
582
583 return ret;
584}
585
f56654c4
TM		 586static int ocfs2_xattr_extend_allocation(struct inode *inode,
587 u32 clusters_to_add,
19b801f4 588 struct ocfs2_xattr_value_buf *vb,
78f30c31 589 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 590{
591 int status = 0;
85db90e7 592 handle_t *handle = ctxt->handle;
f56654c4
TM		 593 enum ocfs2_alloc_restarted why;
594 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
19b801f4 595 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
f99b9b7c 596 struct ocfs2_extent_tree et;
f56654c4
TM		 597
598 mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
599
19b801f4 600 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
f99b9b7c 601
19b801f4 602 status = vb->vb_access(handle, inode, vb->vb_bh,
2a50a743 603 OCFS2_JOURNAL_ACCESS_WRITE);
f56654c4
TM		 604 if (status < 0) {
605 mlog_errno(status);
606 goto leave;
607 }
608
19b801f4 609 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
f56654c4
TM		 610 status = ocfs2_add_clusters_in_btree(osb,
611 inode,
612 &logical_start,
613 clusters_to_add,
614 0,
f99b9b7c 615 &et,
f56654c4 616 handle,
78f30c31
TM		 617 ctxt->data_ac,
618 ctxt->meta_ac,
f99b9b7c 619 &why);
85db90e7
TM		 620 if (status < 0) {
621 mlog_errno(status);
f56654c4
TM		 622 goto leave;
623 }
624
19b801f4 625 status = ocfs2_journal_dirty(handle, vb->vb_bh);
f56654c4
TM		 626 if (status < 0) {
627 mlog_errno(status);
628 goto leave;
629 }
630
19b801f4 631 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters;
f56654c4 632
85db90e7
TM		 633 /*
634 * We should have already allocated enough space before the transaction,
635 * so no need to restart.
636 */
637 BUG_ON(why != RESTART_NONE || clusters_to_add);
f56654c4
TM		 638
639leave:
f56654c4
TM		 640
641 return status;
642}
643
644static int __ocfs2_remove_xattr_range(struct inode *inode,
d72cc72d 645 struct ocfs2_xattr_value_buf *vb,
f56654c4 646 u32 cpos, u32 phys_cpos, u32 len,
78f30c31 647 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 648{
649 int ret;
650 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
85db90e7 651 handle_t *handle = ctxt->handle;
f99b9b7c
JB		 652 struct ocfs2_extent_tree et;
653
d72cc72d 654 ocfs2_init_xattr_value_extent_tree(&et, inode, vb);
f56654c4 655
d72cc72d
JB		 656 ret = vb->vb_access(handle, inode, vb->vb_bh,
657 OCFS2_JOURNAL_ACCESS_WRITE);
f56654c4
TM		 658 if (ret) {
659 mlog_errno(ret);
85db90e7 660 goto out;
f56654c4
TM		 661 }
662
78f30c31
TM		 663 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac,
664 &ctxt->dealloc);
f56654c4
TM		 665 if (ret) {
666 mlog_errno(ret);
85db90e7 667 goto out;
f56654c4
TM		 668 }
669
d72cc72d 670 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
f56654c4 671
d72cc72d 672 ret = ocfs2_journal_dirty(handle, vb->vb_bh);
f56654c4
TM		 673 if (ret) {
674 mlog_errno(ret);
85db90e7 675 goto out;
f56654c4
TM		 676 }
677
78f30c31 678 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len);
f56654c4
TM		 679 if (ret)
680 mlog_errno(ret);
681
f56654c4 682out:
f56654c4
TM		 683 return ret;
684}
685
686static int ocfs2_xattr_shrink_size(struct inode *inode,
687 u32 old_clusters,
688 u32 new_clusters,
19b801f4 689 struct ocfs2_xattr_value_buf *vb,
78f30c31 690 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 691{
692 int ret = 0;
693 u32 trunc_len, cpos, phys_cpos, alloc_size;
694 u64 block;
f56654c4
TM		 695
696 if (old_clusters <= new_clusters)
697 return 0;
698
699 cpos = new_clusters;
700 trunc_len = old_clusters - new_clusters;
701 while (trunc_len) {
702 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
d72cc72d 703 &alloc_size,
19b801f4 704 &vb->vb_xv->xr_list);
f56654c4
TM		 705 if (ret) {
706 mlog_errno(ret);
707 goto out;
708 }
709
710 if (alloc_size > trunc_len)
711 alloc_size = trunc_len;
712
19b801f4 713 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
f56654c4 714 phys_cpos, alloc_size,
78f30c31 715 ctxt);
f56654c4
TM		 716 if (ret) {
717 mlog_errno(ret);
718 goto out;
719 }
720
721 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
722 ocfs2_remove_xattr_clusters_from_cache(inode, block,
723 alloc_size);
724 cpos += alloc_size;
725 trunc_len -= alloc_size;
726 }
727
728out:
f56654c4
TM		 729 return ret;
730}
731
732static int ocfs2_xattr_value_truncate(struct inode *inode,
b3e5d379 733 struct ocfs2_xattr_value_buf *vb,
78f30c31
TM		 734 int len,
735 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 736{
737 int ret;
738 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
b3e5d379 739 u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
f56654c4
TM		 740
741 if (new_clusters == old_clusters)
742 return 0;
743
744 if (new_clusters > old_clusters)
745 ret = ocfs2_xattr_extend_allocation(inode,
746 new_clusters - old_clusters,
b3e5d379 747 vb, ctxt);
f56654c4
TM		 748 else
749 ret = ocfs2_xattr_shrink_size(inode,
750 old_clusters, new_clusters,
b3e5d379 751 vb, ctxt);
f56654c4
TM		 752
753 return ret;
754}
cf1d6c76 755
936b8834
TM		 756static int ocfs2_xattr_list_entry(char *buffer, size_t size,
757 size_t *result, const char *prefix,
758 const char *name, int name_len)
759{
760 char *p = buffer + *result;
761 int prefix_len = strlen(prefix);
762 int total_len = prefix_len + name_len + 1;
763
764 *result += total_len;
765
766 /* we are just looking for how big our buffer needs to be */
767 if (!size)
768 return 0;
769
770 if (*result > size)
771 return -ERANGE;
772
773 memcpy(p, prefix, prefix_len);
774 memcpy(p + prefix_len, name, name_len);
775 p[prefix_len + name_len] = '\0';
776
777 return 0;
778}
779
cf1d6c76
TY		 780static int ocfs2_xattr_list_entries(struct inode *inode,
781 struct ocfs2_xattr_header *header,
782 char *buffer, size_t buffer_size)
783{
936b8834
TM		 784 size_t result = 0;
785 int i, type, ret;
786 const char *prefix, *name;
cf1d6c76
TY		 787
788 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
789 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
936b8834
TM		 790 type = ocfs2_xattr_get_type(entry);
791 prefix = ocfs2_xattr_prefix(type);
792
793 if (prefix) {
794 name = (const char *)header +
795 le16_to_cpu(entry->xe_name_offset);
796
797 ret = ocfs2_xattr_list_entry(buffer, buffer_size,
798 &result, prefix, name,
799 entry->xe_name_len);
800 if (ret)
801 return ret;
cf1d6c76
TY		 802 }
803 }
804
936b8834 805 return result;
cf1d6c76
TY		 806}
807
808static int ocfs2_xattr_ibody_list(struct inode *inode,
809 struct ocfs2_dinode *di,
810 char *buffer,
811 size_t buffer_size)
812{
813 struct ocfs2_xattr_header *header = NULL;
814 struct ocfs2_inode_info *oi = OCFS2_I(inode);
815 int ret = 0;
816
817 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
818 return ret;
819
820 header = (struct ocfs2_xattr_header *)
821 ((void *)di + inode->i_sb->s_blocksize -
822 le16_to_cpu(di->i_xattr_inline_size));
823
824 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
825
826 return ret;
827}
828
829static int ocfs2_xattr_block_list(struct inode *inode,
830 struct ocfs2_dinode *di,
831 char *buffer,
832 size_t buffer_size)
833{
834 struct buffer_head *blk_bh = NULL;
0c044f0b 835 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 836 int ret = 0;
837
838 if (!di->i_xattr_loc)
839 return ret;
840
4ae1d69b
JB		 841 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
842 &blk_bh);
cf1d6c76
TY		 843 if (ret < 0) {
844 mlog_errno(ret);
845 return ret;
846 }
cf1d6c76 847
0c044f0b 848 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
0c044f0b
TM		 849 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
850 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
851 ret = ocfs2_xattr_list_entries(inode, header,
852 buffer, buffer_size);
853 } else {
854 struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
855 ret = ocfs2_xattr_tree_list_index_block(inode, xt,
856 buffer, buffer_size);
857 }
4ae1d69b 858
cf1d6c76
TY		 859 brelse(blk_bh);
860
861 return ret;
862}
863
864ssize_t ocfs2_listxattr(struct dentry *dentry,
865 char *buffer,
866 size_t size)
867{
868 int ret = 0, i_ret = 0, b_ret = 0;
869 struct buffer_head *di_bh = NULL;
870 struct ocfs2_dinode *di = NULL;
871 struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode);
872
8154da3d
TY		 873 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
874 return -EOPNOTSUPP;
875
cf1d6c76
TY		 876 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
877 return ret;
878
879 ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0);
880 if (ret < 0) {
881 mlog_errno(ret);
882 return ret;
883 }
884
885 di = (struct ocfs2_dinode *)di_bh->b_data;
886
887 down_read(&oi->ip_xattr_sem);
888 i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size);
889 if (i_ret < 0)
890 b_ret = 0;
891 else {
892 if (buffer) {
893 buffer += i_ret;
894 size -= i_ret;
895 }
896 b_ret = ocfs2_xattr_block_list(dentry->d_inode, di,
897 buffer, size);
898 if (b_ret < 0)
899 i_ret = 0;
900 }
901 up_read(&oi->ip_xattr_sem);
902 ocfs2_inode_unlock(dentry->d_inode, 0);
903
904 brelse(di_bh);
905
906 return i_ret + b_ret;
907}
908
909static int ocfs2_xattr_find_entry(int name_index,
910 const char *name,
911 struct ocfs2_xattr_search *xs)
912{
913 struct ocfs2_xattr_entry *entry;
914 size_t name_len;
915 int i, cmp = 1;
916
917 if (name == NULL)
918 return -EINVAL;
919
920 name_len = strlen(name);
921 entry = xs->here;
922 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
923 cmp = name_index - ocfs2_xattr_get_type(entry);
924 if (!cmp)
925 cmp = name_len - entry->xe_name_len;
926 if (!cmp)
927 cmp = memcmp(name, (xs->base +
928 le16_to_cpu(entry->xe_name_offset)),
929 name_len);
930 if (cmp == 0)
931 break;
932 entry += 1;
933 }
934 xs->here = entry;
935
936 return cmp ? -ENODATA : 0;
937}
938
939static int ocfs2_xattr_get_value_outside(struct inode *inode,
589dc260 940 struct ocfs2_xattr_value_root *xv,
cf1d6c76
TY		 941 void *buffer,
942 size_t len)
943{
944 u32 cpos, p_cluster, num_clusters, bpc, clusters;
945 u64 blkno;
946 int i, ret = 0;
947 size_t cplen, blocksize;
948 struct buffer_head *bh = NULL;
cf1d6c76
TY		 949 struct ocfs2_extent_list *el;
950
cf1d6c76
TY		 951 el = &xv->xr_list;
952 clusters = le32_to_cpu(xv->xr_clusters);
953 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
954 blocksize = inode->i_sb->s_blocksize;
955
956 cpos = 0;
957 while (cpos < clusters) {
958 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
959 &num_clusters, el);
960 if (ret) {
961 mlog_errno(ret);
962 goto out;
963 }
964
965 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
966 /* Copy ocfs2_xattr_value */
967 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
970e4936 968 ret = ocfs2_read_block(inode, blkno, &bh, NULL);
cf1d6c76
TY		 969 if (ret) {
970 mlog_errno(ret);
971 goto out;
972 }
973
974 cplen = len >= blocksize ? blocksize : len;
975 memcpy(buffer, bh->b_data, cplen);
976 len -= cplen;
977 buffer += cplen;
978
979 brelse(bh);
980 bh = NULL;
981 if (len == 0)
982 break;
983 }
984 cpos += num_clusters;
985 }
986out:
987 return ret;
988}
989
990static int ocfs2_xattr_ibody_get(struct inode *inode,
991 int name_index,
992 const char *name,
993 void *buffer,
994 size_t buffer_size,
995 struct ocfs2_xattr_search *xs)
996{
997 struct ocfs2_inode_info *oi = OCFS2_I(inode);
998 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
589dc260 999 struct ocfs2_xattr_value_root *xv;
cf1d6c76
TY		 1000 size_t size;
1001 int ret = 0;
1002
1003 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
1004 return -ENODATA;
1005
1006 xs->end = (void *)di + inode->i_sb->s_blocksize;
1007 xs->header = (struct ocfs2_xattr_header *)
1008 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1009 xs->base = (void *)xs->header;
1010 xs->here = xs->header->xh_entries;
1011
1012 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1013 if (ret)
1014 return ret;
1015 size = le64_to_cpu(xs->here->xe_value_size);
1016 if (buffer) {
1017 if (size > buffer_size)
1018 return -ERANGE;
1019 if (ocfs2_xattr_is_local(xs->here)) {
1020 memcpy(buffer, (void *)xs->base +
1021 le16_to_cpu(xs->here->xe_name_offset) +
1022 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1023 } else {
589dc260
TM		 1024 xv = (struct ocfs2_xattr_value_root *)
1025 (xs->base + le16_to_cpu(
1026 xs->here->xe_name_offset) +
1027 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1028 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1029 buffer, size);
1030 if (ret < 0) {
1031 mlog_errno(ret);
1032 return ret;
1033 }
1034 }
1035 }
1036
1037 return size;
1038}
1039
1040static int ocfs2_xattr_block_get(struct inode *inode,
1041 int name_index,
1042 const char *name,
1043 void *buffer,
1044 size_t buffer_size,
1045 struct ocfs2_xattr_search *xs)
1046{
cf1d6c76 1047 struct ocfs2_xattr_block *xb;
589dc260 1048 struct ocfs2_xattr_value_root *xv;
cf1d6c76 1049 size_t size;
589dc260 1050 int ret = -ENODATA, name_offset, name_len, block_off, i;
cf1d6c76 1051
ba937127
JB		 1052 xs->bucket = ocfs2_xattr_bucket_new(inode);
1053 if (!xs->bucket) {
1054 ret = -ENOMEM;
1055 mlog_errno(ret);
1056 goto cleanup;
1057 }
589dc260 1058
54f443f4
JB		 1059 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1060 if (ret) {
cf1d6c76 1061 mlog_errno(ret);
cf1d6c76
TY		 1062 goto cleanup;
1063 }
1064
6c1e183e
TY		 1065 if (xs->not_found) {
1066 ret = -ENODATA;
1067 goto cleanup;
1068 }
1069
54f443f4 1070 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 1071 size = le64_to_cpu(xs->here->xe_value_size);
1072 if (buffer) {
1073 ret = -ERANGE;
1074 if (size > buffer_size)
1075 goto cleanup;
589dc260
TM		 1076
1077 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1078 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1079 i = xs->here - xs->header->xh_entries;
1080
1081 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
1082 ret = ocfs2_xattr_bucket_get_name_value(inode,
ba937127 1083 bucket_xh(xs->bucket),
589dc260
TM		 1084 i,
1085 &block_off,
1086 &name_offset);
ba937127 1087 xs->base = bucket_block(xs->bucket, block_off);
589dc260 1088 }
cf1d6c76
TY		 1089 if (ocfs2_xattr_is_local(xs->here)) {
1090 memcpy(buffer, (void *)xs->base +
589dc260 1091 name_offset + name_len, size);
cf1d6c76 1092 } else {
589dc260
TM		 1093 xv = (struct ocfs2_xattr_value_root *)
1094 (xs->base + name_offset + name_len);
1095 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1096 buffer, size);
1097 if (ret < 0) {
1098 mlog_errno(ret);
1099 goto cleanup;
1100 }
1101 }
1102 }
1103 ret = size;
1104cleanup:
ba937127 1105 ocfs2_xattr_bucket_free(xs->bucket);
cf1d6c76 1106
54f443f4
JB		 1107 brelse(xs->xattr_bh);
1108 xs->xattr_bh = NULL;
cf1d6c76
TY		 1109 return ret;
1110}
1111
4e3e9d02
TY		 1112int ocfs2_xattr_get_nolock(struct inode *inode,
1113 struct buffer_head *di_bh,
0030e001
TY		 1114 int name_index,
1115 const char *name,
1116 void *buffer,
1117 size_t buffer_size)
cf1d6c76
TY		 1118{
1119 int ret;
1120 struct ocfs2_dinode *di = NULL;
cf1d6c76
TY		 1121 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1122 struct ocfs2_xattr_search xis = {
1123 .not_found = -ENODATA,
1124 };
1125 struct ocfs2_xattr_search xbs = {
1126 .not_found = -ENODATA,
1127 };
1128
8154da3d
TY		 1129 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1130 return -EOPNOTSUPP;
1131
cf1d6c76
TY		 1132 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1133 ret = -ENODATA;
1134
cf1d6c76
TY		 1135 xis.inode_bh = xbs.inode_bh = di_bh;
1136 di = (struct ocfs2_dinode *)di_bh->b_data;
1137
1138 down_read(&oi->ip_xattr_sem);
1139 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1140 buffer_size, &xis);
6c1e183e 1141 if (ret == -ENODATA && di->i_xattr_loc)
cf1d6c76
TY		 1142 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1143 buffer_size, &xbs);
1144 up_read(&oi->ip_xattr_sem);
4e3e9d02
TY		 1145
1146 return ret;
1147}
1148
1149/* ocfs2_xattr_get()
1150 *
1151 * Copy an extended attribute into the buffer provided.
1152 * Buffer is NULL to compute the size of buffer required.
1153 */
1154static int ocfs2_xattr_get(struct inode *inode,
1155 int name_index,
1156 const char *name,
1157 void *buffer,
1158 size_t buffer_size)
1159{
1160 int ret;
1161 struct buffer_head *di_bh = NULL;
1162
1163 ret = ocfs2_inode_lock(inode, &di_bh, 0);
1164 if (ret < 0) {
1165 mlog_errno(ret);
1166 return ret;
1167 }
1168 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1169 name, buffer, buffer_size);
1170
cf1d6c76
TY		 1171 ocfs2_inode_unlock(inode, 0);
1172
1173 brelse(di_bh);
1174
1175 return ret;
1176}
1177
1178static int __ocfs2_xattr_set_value_outside(struct inode *inode,
85db90e7 1179 handle_t *handle,
cf1d6c76
TY		 1180 struct ocfs2_xattr_value_root *xv,
1181 const void *value,
1182 int value_len)
1183{
71d548a6 1184 int ret = 0, i, cp_len;
cf1d6c76
TY		 1185 u16 blocksize = inode->i_sb->s_blocksize;
1186 u32 p_cluster, num_clusters;
1187 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1188 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1189 u64 blkno;
1190 struct buffer_head *bh = NULL;
cf1d6c76
TY		 1191
1192 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1193
cf1d6c76
TY		 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);
cf1d6c76
TY		 1666
1667 ret = ocfs2_journal_dirty(handle, xs->inode_bh);
1668 if (ret < 0)
1669 mlog_errno(ret);
1670
cf1d6c76
TY		 1671 if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
1672 /*
1673 * Set value outside in B tree.
1674 * This is the second step for value size > INLINE_SIZE.
1675 */
1676 size_t offs = le16_to_cpu(xs->here->xe_name_offset);
512620f4
JB		 1677 ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt,
1678 &vb, offs);
cf1d6c76
TY		 1679 if (ret < 0) {
1680 int ret2;
1681
1682 mlog_errno(ret);
1683 /*
1684 * If set value outside failed, we have to clean
1685 * the junk tree root we have already set in local.
1686 */
85db90e7 1687 ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle,
512620f4 1688 xi, xs, &vb, offs);
cf1d6c76
TY		 1689 if (ret2 < 0)
1690 mlog_errno(ret2);
1691 }
1692 }
1693out:
1694 return ret;
cf1d6c76
TY		 1695}
1696
cf1d6c76 1697static int ocfs2_remove_value_outside(struct inode*inode,
4311901d 1698 struct ocfs2_xattr_value_buf *vb,
cf1d6c76
TY		 1699 struct ocfs2_xattr_header *header)
1700{
1701 int ret = 0, i;
78f30c31
TM		 1702 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1703 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
1704
1705 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
cf1d6c76 1706
a90714c1
JK		 1707 ctxt.handle = ocfs2_start_trans(osb,
1708 ocfs2_remove_extent_credits(osb->sb));
85db90e7
TM		 1709 if (IS_ERR(ctxt.handle)) {
1710 ret = PTR_ERR(ctxt.handle);
1711 mlog_errno(ret);
1712 goto out;
1713 }
1714
cf1d6c76
TY		 1715 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
1716 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
1717
1718 if (!ocfs2_xattr_is_local(entry)) {
cf1d6c76
TY		 1719 void *val;
1720
1721 val = (void *)header +
1722 le16_to_cpu(entry->xe_name_offset);
4311901d 1723 vb->vb_xv = (struct ocfs2_xattr_value_root *)
cf1d6c76 1724 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
4311901d 1725 ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt);
cf1d6c76
TY		 1726 if (ret < 0) {
1727 mlog_errno(ret);
78f30c31 1728 break;
cf1d6c76
TY		 1729 }
1730 }
1731 }
1732
85db90e7 1733 ocfs2_commit_trans(osb, ctxt.handle);
78f30c31
TM		 1734 ocfs2_schedule_truncate_log_flush(osb, 1);
1735 ocfs2_run_deallocs(osb, &ctxt.dealloc);
85db90e7 1736out:
cf1d6c76
TY		 1737 return ret;
1738}
1739
1740static int ocfs2_xattr_ibody_remove(struct inode *inode,
1741 struct buffer_head *di_bh)
1742{
1743
1744 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
1745 struct ocfs2_xattr_header *header;
1746 int ret;
4311901d
JB		 1747 struct ocfs2_xattr_value_buf vb = {
1748 .vb_bh = di_bh,
1749 .vb_access = ocfs2_journal_access_di,
1750 };
cf1d6c76
TY		 1751
1752 header = (struct ocfs2_xattr_header *)
1753 ((void *)di + inode->i_sb->s_blocksize -
1754 le16_to_cpu(di->i_xattr_inline_size));
1755
4311901d 1756 ret = ocfs2_remove_value_outside(inode, &vb, header);
cf1d6c76
TY		 1757
1758 return ret;
1759}
1760
1761static int ocfs2_xattr_block_remove(struct inode *inode,
1762 struct buffer_head *blk_bh)
1763{
1764 struct ocfs2_xattr_block *xb;
cf1d6c76 1765 int ret = 0;
4311901d
JB		 1766 struct ocfs2_xattr_value_buf vb = {
1767 .vb_bh = blk_bh,
1768 .vb_access = ocfs2_journal_access_xb,
1769 };
cf1d6c76
TY		 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);
4311901d 1774 ret = ocfs2_remove_value_outside(inode, &vb, header);
a3944256
TM		 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 }
84008972
JB		 1893 ret = ocfs2_journal_access_di(handle, inode, di_bh,
1894 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 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) {
84008972
JB		 2102 ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh,
2103 OCFS2_JOURNAL_ACCESS_CREATE);
cf1d6c76
TY		 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
84008972
JB		 2120 ret = ocfs2_journal_access_xb(handle, inode, new_bh,
2121 OCFS2_JOURNAL_ACCESS_CREATE);
cf1d6c76
TY		 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
71d548a6
TM		 2232 /*
2233 * Calculate the clusters we need to write.
2234 * No matter whether we replace an old one or add a new one,
2235 * we need this for writing.
2236 */
2237 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
2238 credits += new_clusters *
2239 ocfs2_clusters_to_blocks(inode->i_sb, 1);
2240
78f30c31 2241 if (xis->not_found && xbs->not_found) {
85db90e7
TM		 2242 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2243
2244 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31 2245 clusters_add += new_clusters;
85db90e7
TM		 2246 credits += ocfs2_calc_extend_credits(inode->i_sb,
2247 &def_xv.xv.xr_list,
2248 new_clusters);
2249 }
78f30c31
TM		 2250
2251 goto meta_guess;
2252 }
2253
2254 if (!xis->not_found) {
2255 xe = xis->here;
2256 name_offset = le16_to_cpu(xe->xe_name_offset);
2257 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2258 base = xis->base;
85db90e7 2259 credits += OCFS2_INODE_UPDATE_CREDITS;
78f30c31 2260 } else {
970e4936 2261 int i, block_off = 0;
78f30c31
TM		 2262 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2263 xe = xbs->here;
2264 name_offset = le16_to_cpu(xe->xe_name_offset);
2265 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
2266 i = xbs->here - xbs->header->xh_entries;
2267 old_in_xb = 1;
2268
2269 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2270 ret = ocfs2_xattr_bucket_get_name_value(inode,
2271 bucket_xh(xbs->bucket),
2272 i, &block_off,
2273 &name_offset);
2274 base = bucket_block(xbs->bucket, block_off);
85db90e7
TM		 2275 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2276 } else {
78f30c31 2277 base = xbs->base;
85db90e7
TM		 2278 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
2279 }
2280 }
2281
2282 /*
2283 * delete a xattr doesn't need metadata and cluster allocation.
2284 * so just calculate the credits and return.
2285 *
2286 * The credits for removing the value tree will be extended
2287 * by ocfs2_remove_extent itself.
2288 */
2289 if (!xi->value) {
2290 if (!ocfs2_xattr_is_local(xe))
a90714c1 2291 credits += ocfs2_remove_extent_credits(inode->i_sb);
85db90e7
TM		 2292
2293 goto out;
78f30c31
TM		 2294 }
2295
2296 /* do cluster allocation guess first. */
2297 value_size = le64_to_cpu(xe->xe_value_size);
2298
2299 if (old_in_xb) {
2300 /*
2301 * In xattr set, we always try to set the xe in inode first,
2302 * so if it can be inserted into inode successfully, the old
2303 * one will be removed from the xattr block, and this xattr
2304 * will be inserted into inode as a new xattr in inode.
2305 */
2306 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
2307 clusters_add += new_clusters;
a90714c1 2308 credits += ocfs2_remove_extent_credits(inode->i_sb) +
85db90e7
TM		 2309 OCFS2_INODE_UPDATE_CREDITS;
2310 if (!ocfs2_xattr_is_local(xe))
2311 credits += ocfs2_calc_extend_credits(
2312 inode->i_sb,
2313 &def_xv.xv.xr_list,
2314 new_clusters);
78f30c31
TM		 2315 goto out;
2316 }
2317 }
2318
2319 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
2320 /* the new values will be stored outside. */
2321 u32 old_clusters = 0;
2322
2323 if (!ocfs2_xattr_is_local(xe)) {
2324 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
2325 value_size);
2326 xv = (struct ocfs2_xattr_value_root *)
2327 (base + name_offset + name_len);
97aff52a 2328 value_size = OCFS2_XATTR_ROOT_SIZE;
78f30c31
TM		 2329 } else
2330 xv = &def_xv.xv;
2331
85db90e7 2332 if (old_clusters >= new_clusters) {
a90714c1 2333 credits += ocfs2_remove_extent_credits(inode->i_sb);
78f30c31 2334 goto out;
85db90e7 2335 } else {
78f30c31
TM		 2336 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
2337 clusters_add += new_clusters - old_clusters;
85db90e7
TM		 2338 credits += ocfs2_calc_extend_credits(inode->i_sb,
2339 &xv->xr_list,
2340 new_clusters -
2341 old_clusters);
97aff52a
TM		 2342 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
2343 goto out;
78f30c31
TM		 2344 }
2345 } else {
2346 /*
2347 * Now the new value will be stored inside. So if the new
2348 * value is smaller than the size of value root or the old
2349 * value, we don't need any allocation, otherwise we have
2350 * to guess metadata allocation.
2351 */
2352 if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
2353 (!ocfs2_xattr_is_local(xe) &&
2354 OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
2355 goto out;
2356 }
2357
2358meta_guess:
2359 /* calculate metadata allocation. */
2360 if (di->i_xattr_loc) {
2361 if (!xbs->xattr_bh) {
4ae1d69b
JB		 2362 ret = ocfs2_read_xattr_block(inode,
2363 le64_to_cpu(di->i_xattr_loc),
2364 &bh);
78f30c31
TM		 2365 if (ret) {
2366 mlog_errno(ret);
2367 goto out;
2368 }
2369
2370 xb = (struct ocfs2_xattr_block *)bh->b_data;
2371 } else
2372 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
2373
90cb546c
TM		 2374 /*
2375 * If there is already an xattr tree, good, we can calculate
2376 * like other b-trees. Otherwise we may have the chance of
2377 * create a tree, the credit calculation is borrowed from
2378 * ocfs2_calc_extend_credits with root_el = NULL. And the
2379 * new tree will be cluster based, so no meta is needed.
2380 */
78f30c31
TM		 2381 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
2382 struct ocfs2_extent_list *el =
2383 &xb->xb_attrs.xb_root.xt_list;
2384 meta_add += ocfs2_extend_meta_needed(el);
85db90e7
TM		 2385 credits += ocfs2_calc_extend_credits(inode->i_sb,
2386 el, 1);
90cb546c
TM		 2387 } else
2388 credits += OCFS2_SUBALLOC_ALLOC + 1;
78f30c31
TM		 2389
2390 /*
2391 * This cluster will be used either for new bucket or for
2392 * new xattr block.
2393 * If the cluster size is the same as the bucket size, one
2394 * more is needed since we may need to extend the bucket
2395 * also.
2396 */
2397 clusters_add += 1;
85db90e7 2398 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 2399 if (OCFS2_XATTR_BUCKET_SIZE ==
85db90e7
TM		 2400 OCFS2_SB(inode->i_sb)->s_clustersize) {
2401 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 2402 clusters_add += 1;
85db90e7
TM		 2403 }
2404 } else {
78f30c31 2405 meta_add += 1;
85db90e7
TM		 2406 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
2407 }
78f30c31
TM		 2408out:
2409 if (clusters_need)
2410 *clusters_need = clusters_add;
2411 if (meta_need)
2412 *meta_need = meta_add;
85db90e7
TM		 2413 if (credits_need)
2414 *credits_need = credits;
78f30c31
TM		 2415 brelse(bh);
2416 return ret;
2417}
2418
2419static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
2420 struct ocfs2_dinode *di,
2421 struct ocfs2_xattr_info *xi,
2422 struct ocfs2_xattr_search *xis,
2423 struct ocfs2_xattr_search *xbs,
85db90e7
TM		 2424 struct ocfs2_xattr_set_ctxt *ctxt,
2425 int *credits)
78f30c31
TM		 2426{
2427 int clusters_add, meta_add, ret;
2428 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2429
2430 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
2431
2432 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
2433
2434 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
85db90e7 2435 &clusters_add, &meta_add, credits);
78f30c31
TM		 2436 if (ret) {
2437 mlog_errno(ret);
2438 return ret;
2439 }
2440
85db90e7
TM		 2441 mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, "
2442 "credits = %d\n", xi->name, meta_add, clusters_add, *credits);
78f30c31
TM		 2443
2444 if (meta_add) {
2445 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
2446 &ctxt->meta_ac);
2447 if (ret) {
2448 mlog_errno(ret);
2449 goto out;
2450 }
2451 }
2452
2453 if (clusters_add) {
2454 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
2455 if (ret)
2456 mlog_errno(ret);
2457 }
2458out:
2459 if (ret) {
2460 if (ctxt->meta_ac) {
2461 ocfs2_free_alloc_context(ctxt->meta_ac);
2462 ctxt->meta_ac = NULL;
2463 }
2464
2465 /*
2466 * We cannot have an error and a non null ctxt->data_ac.
2467 */
2468 }
2469
2470 return ret;
2471}
2472
85db90e7
TM		 2473static int __ocfs2_xattr_set_handle(struct inode *inode,
2474 struct ocfs2_dinode *di,
2475 struct ocfs2_xattr_info *xi,
2476 struct ocfs2_xattr_search *xis,
2477 struct ocfs2_xattr_search *xbs,
2478 struct ocfs2_xattr_set_ctxt *ctxt)
2479{
9f868f16 2480 int ret = 0, credits, old_found;
85db90e7
TM		 2481
2482 if (!xi->value) {
2483 /* Remove existing extended attribute */
2484 if (!xis->not_found)
2485 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2486 else if (!xbs->not_found)
2487 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2488 } else {
2489 /* We always try to set extended attribute into inode first*/
2490 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
2491 if (!ret && !xbs->not_found) {
2492 /*
2493 * If succeed and that extended attribute existing in
2494 * external block, then we will remove it.
2495 */
2496 xi->value = NULL;
2497 xi->value_len = 0;
2498
9f868f16 2499 old_found = xis->not_found;
85db90e7
TM		 2500 xis->not_found = -ENODATA;
2501 ret = ocfs2_calc_xattr_set_need(inode,
2502 di,
2503 xi,
2504 xis,
2505 xbs,
2506 NULL,
2507 NULL,
2508 &credits);
9f868f16 2509 xis->not_found = old_found;
85db90e7
TM		 2510 if (ret) {
2511 mlog_errno(ret);
2512 goto out;
2513 }
2514
2515 ret = ocfs2_extend_trans(ctxt->handle, credits +
2516 ctxt->handle->h_buffer_credits);
2517 if (ret) {
2518 mlog_errno(ret);
2519 goto out;
2520 }
2521 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2522 } else if (ret == -ENOSPC) {
2523 if (di->i_xattr_loc && !xbs->xattr_bh) {
2524 ret = ocfs2_xattr_block_find(inode,
2525 xi->name_index,
2526 xi->name, xbs);
2527 if (ret)
2528 goto out;
2529
9f868f16 2530 old_found = xis->not_found;
85db90e7
TM		 2531 xis->not_found = -ENODATA;
2532 ret = ocfs2_calc_xattr_set_need(inode,
2533 di,
2534 xi,
2535 xis,
2536 xbs,
2537 NULL,
2538 NULL,
2539 &credits);
9f868f16 2540 xis->not_found = old_found;
85db90e7
TM		 2541 if (ret) {
2542 mlog_errno(ret);
2543 goto out;
2544 }
2545
2546 ret = ocfs2_extend_trans(ctxt->handle, credits +
2547 ctxt->handle->h_buffer_credits);
2548 if (ret) {
2549 mlog_errno(ret);
2550 goto out;
2551 }
2552 }
2553 /*
2554 * If no space in inode, we will set extended attribute
2555 * into external block.
2556 */
2557 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
2558 if (ret)
2559 goto out;
2560 if (!xis->not_found) {
2561 /*
2562 * If succeed and that extended attribute
2563 * existing in inode, we will remove it.
2564 */
2565 xi->value = NULL;
2566 xi->value_len = 0;
2567 xbs->not_found = -ENODATA;
2568 ret = ocfs2_calc_xattr_set_need(inode,
2569 di,
2570 xi,
2571 xis,
2572 xbs,
2573 NULL,
2574 NULL,
2575 &credits);
2576 if (ret) {
2577 mlog_errno(ret);
2578 goto out;
2579 }
2580
2581 ret = ocfs2_extend_trans(ctxt->handle, credits +
2582 ctxt->handle->h_buffer_credits);
2583 if (ret) {
2584 mlog_errno(ret);
2585 goto out;
2586 }
2587 ret = ocfs2_xattr_ibody_set(inode, xi,
2588 xis, ctxt);
2589 }
2590 }
2591 }
2592
4b3f6209
TM		 2593 if (!ret) {
2594 /* Update inode ctime. */
2595 ret = ocfs2_journal_access(ctxt->handle, inode, xis->inode_bh,
2596 OCFS2_JOURNAL_ACCESS_WRITE);
2597 if (ret) {
2598 mlog_errno(ret);
2599 goto out;
2600 }
2601
2602 inode->i_ctime = CURRENT_TIME;
2603 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
2604 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
2605 ocfs2_journal_dirty(ctxt->handle, xis->inode_bh);
2606 }
85db90e7
TM		 2607out:
2608 return ret;
2609}
2610
6c3faba4
TY		 2611/*
2612 * This function only called duing creating inode
2613 * for init security/acl xattrs of the new inode.
008aafaf 2614 * All transanction credits have been reserved in mknod.
6c3faba4
TY		 2615 */
2616int ocfs2_xattr_set_handle(handle_t *handle,
2617 struct inode *inode,
2618 struct buffer_head *di_bh,
2619 int name_index,
2620 const char *name,
2621 const void *value,
2622 size_t value_len,
2623 int flags,
2624 struct ocfs2_alloc_context *meta_ac,
2625 struct ocfs2_alloc_context *data_ac)
2626{
2627 struct ocfs2_dinode *di;
2628 int ret;
2629
2630 struct ocfs2_xattr_info xi = {
2631 .name_index = name_index,
2632 .name = name,
2633 .value = value,
2634 .value_len = value_len,
2635 };
2636
2637 struct ocfs2_xattr_search xis = {
2638 .not_found = -ENODATA,
2639 };
2640
2641 struct ocfs2_xattr_search xbs = {
2642 .not_found = -ENODATA,
2643 };
2644
2645 struct ocfs2_xattr_set_ctxt ctxt = {
2646 .handle = handle,
2647 .meta_ac = meta_ac,
2648 .data_ac = data_ac,
2649 };
2650
2651 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2652 return -EOPNOTSUPP;
2653
008aafaf
TY		 2654 /*
2655 * In extreme situation, may need xattr bucket when
2656 * block size is too small. And we have already reserved
2657 * the credits for bucket in mknod.
2658 */
2659 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) {
2660 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2661 if (!xbs.bucket) {
2662 mlog_errno(-ENOMEM);
2663 return -ENOMEM;
2664 }
2665 }
2666
6c3faba4
TY		 2667 xis.inode_bh = xbs.inode_bh = di_bh;
2668 di = (struct ocfs2_dinode *)di_bh->b_data;
2669
2670 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2671
2672 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2673 if (ret)
2674 goto cleanup;
2675 if (xis.not_found) {
2676 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2677 if (ret)
2678 goto cleanup;
2679 }
2680
2681 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2682
2683cleanup:
2684 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2685 brelse(xbs.xattr_bh);
008aafaf 2686 ocfs2_xattr_bucket_free(xbs.bucket);
6c3faba4
TY		 2687
2688 return ret;
2689}
2690
cf1d6c76
TY		 2691/*
2692 * ocfs2_xattr_set()
2693 *
2694 * Set, replace or remove an extended attribute for this inode.
2695 * value is NULL to remove an existing extended attribute, else either
2696 * create or replace an extended attribute.
2697 */
2698int ocfs2_xattr_set(struct inode *inode,
2699 int name_index,
2700 const char *name,
2701 const void *value,
2702 size_t value_len,
2703 int flags)
2704{
2705 struct buffer_head *di_bh = NULL;
2706 struct ocfs2_dinode *di;
85db90e7 2707 int ret, credits;
78f30c31 2708 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
85db90e7 2709 struct inode *tl_inode = osb->osb_tl_inode;
78f30c31 2710 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
cf1d6c76
TY		 2711
2712 struct ocfs2_xattr_info xi = {
2713 .name_index = name_index,
2714 .name = name,
2715 .value = value,
2716 .value_len = value_len,
2717 };
2718
2719 struct ocfs2_xattr_search xis = {
2720 .not_found = -ENODATA,
2721 };
2722
2723 struct ocfs2_xattr_search xbs = {
2724 .not_found = -ENODATA,
2725 };
2726
8154da3d
TY		 2727 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2728 return -EOPNOTSUPP;
2729
ba937127
JB		 2730 /*
2731 * Only xbs will be used on indexed trees. xis doesn't need a
2732 * bucket.
2733 */
2734 xbs.bucket = ocfs2_xattr_bucket_new(inode);
2735 if (!xbs.bucket) {
2736 mlog_errno(-ENOMEM);
2737 return -ENOMEM;
2738 }
2739
cf1d6c76
TY		 2740 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2741 if (ret < 0) {
2742 mlog_errno(ret);
ba937127 2743 goto cleanup_nolock;
cf1d6c76
TY		 2744 }
2745 xis.inode_bh = xbs.inode_bh = di_bh;
2746 di = (struct ocfs2_dinode *)di_bh->b_data;
2747
2748 down_write(&OCFS2_I(inode)->ip_xattr_sem);
2749 /*
2750 * Scan inode and external block to find the same name
2751 * extended attribute and collect search infomation.
2752 */
2753 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
2754 if (ret)
2755 goto cleanup;
2756 if (xis.not_found) {
2757 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
2758 if (ret)
2759 goto cleanup;
2760 }
2761
2762 if (xis.not_found && xbs.not_found) {
2763 ret = -ENODATA;
2764 if (flags & XATTR_REPLACE)
2765 goto cleanup;
2766 ret = 0;
2767 if (!value)
2768 goto cleanup;
2769 } else {
2770 ret = -EEXIST;
2771 if (flags & XATTR_CREATE)
2772 goto cleanup;
2773 }
2774
85db90e7
TM		 2775
2776 mutex_lock(&tl_inode->i_mutex);
2777
2778 if (ocfs2_truncate_log_needs_flush(osb)) {
2779 ret = __ocfs2_flush_truncate_log(osb);
2780 if (ret < 0) {
2781 mutex_unlock(&tl_inode->i_mutex);
2782 mlog_errno(ret);
2783 goto cleanup;
2784 }
2785 }
2786 mutex_unlock(&tl_inode->i_mutex);
2787
2788 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
2789 &xbs, &ctxt, &credits);
78f30c31
TM		 2790 if (ret) {
2791 mlog_errno(ret);
2792 goto cleanup;
2793 }
2794
4b3f6209
TM		 2795 /* we need to update inode's ctime field, so add credit for it. */
2796 credits += OCFS2_INODE_UPDATE_CREDITS;
85db90e7
TM		 2797 ctxt.handle = ocfs2_start_trans(osb, credits);
2798 if (IS_ERR(ctxt.handle)) {
2799 ret = PTR_ERR(ctxt.handle);
2800 mlog_errno(ret);
2801 goto cleanup;
cf1d6c76 2802 }
85db90e7
TM		 2803
2804 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
2805
2806 ocfs2_commit_trans(osb, ctxt.handle);
2807
78f30c31
TM		 2808 if (ctxt.data_ac)
2809 ocfs2_free_alloc_context(ctxt.data_ac);
2810 if (ctxt.meta_ac)
2811 ocfs2_free_alloc_context(ctxt.meta_ac);
2812 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
2813 ocfs2_schedule_truncate_log_flush(osb, 1);
2814 ocfs2_run_deallocs(osb, &ctxt.dealloc);
cf1d6c76
TY		 2815cleanup:
2816 up_write(&OCFS2_I(inode)->ip_xattr_sem);
2817 ocfs2_inode_unlock(inode, 1);
ba937127 2818cleanup_nolock:
cf1d6c76
TY		 2819 brelse(di_bh);
2820 brelse(xbs.xattr_bh);
ba937127 2821 ocfs2_xattr_bucket_free(xbs.bucket);
cf1d6c76
TY		 2822
2823 return ret;
2824}
2825
0c044f0b
TM		 2826/*
2827 * Find the xattr extent rec which may contains name_hash.
2828 * e_cpos will be the first name hash of the xattr rec.
2829 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
2830 */
2831static int ocfs2_xattr_get_rec(struct inode *inode,
2832 u32 name_hash,
2833 u64 *p_blkno,
2834 u32 *e_cpos,
2835 u32 *num_clusters,
2836 struct ocfs2_extent_list *el)
2837{
2838 int ret = 0, i;
2839 struct buffer_head *eb_bh = NULL;
2840 struct ocfs2_extent_block *eb;
2841 struct ocfs2_extent_rec *rec = NULL;
2842 u64 e_blkno = 0;
2843
2844 if (el->l_tree_depth) {
2845 ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh);
2846 if (ret) {
2847 mlog_errno(ret);
2848 goto out;
2849 }
2850
2851 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
2852 el = &eb->h_list;
2853
2854 if (el->l_tree_depth) {
2855 ocfs2_error(inode->i_sb,
2856 "Inode %lu has non zero tree depth in "
2857 "xattr tree block %llu\n", inode->i_ino,
2858 (unsigned long long)eb_bh->b_blocknr);
2859 ret = -EROFS;
2860 goto out;
2861 }
2862 }
2863
2864 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
2865 rec = &el->l_recs[i];
2866
2867 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
2868 e_blkno = le64_to_cpu(rec->e_blkno);
2869 break;
2870 }
2871 }
2872
2873 if (!e_blkno) {
2874 ocfs2_error(inode->i_sb, "Inode %lu has bad extent "
2875 "record (%u, %u, 0) in xattr", inode->i_ino,
2876 le32_to_cpu(rec->e_cpos),
2877 ocfs2_rec_clusters(el, rec));
2878 ret = -EROFS;
2879 goto out;
2880 }
2881
2882 *p_blkno = le64_to_cpu(rec->e_blkno);
2883 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
2884 if (e_cpos)
2885 *e_cpos = le32_to_cpu(rec->e_cpos);
2886out:
2887 brelse(eb_bh);
2888 return ret;
2889}
2890
2891typedef int (xattr_bucket_func)(struct inode *inode,
2892 struct ocfs2_xattr_bucket *bucket,
2893 void *para);
2894
589dc260 2895static int ocfs2_find_xe_in_bucket(struct inode *inode,
e2356a3f 2896 struct ocfs2_xattr_bucket *bucket,
589dc260
TM		 2897 int name_index,
2898 const char *name,
2899 u32 name_hash,
2900 u16 *xe_index,
2901 int *found)
2902{
2903 int i, ret = 0, cmp = 1, block_off, new_offset;
e2356a3f 2904 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
589dc260
TM		 2905 size_t name_len = strlen(name);
2906 struct ocfs2_xattr_entry *xe = NULL;
589dc260
TM		 2907 char *xe_name;
2908
2909 /*
2910 * We don't use binary search in the bucket because there
2911 * may be multiple entries with the same name hash.
2912 */
2913 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
2914 xe = &xh->xh_entries[i];
2915
2916 if (name_hash > le32_to_cpu(xe->xe_name_hash))
2917 continue;
2918 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
2919 break;
2920
2921 cmp = name_index - ocfs2_xattr_get_type(xe);
2922 if (!cmp)
2923 cmp = name_len - xe->xe_name_len;
2924 if (cmp)
2925 continue;
2926
2927 ret = ocfs2_xattr_bucket_get_name_value(inode,
2928 xh,
2929 i,
2930 &block_off,
2931 &new_offset);
2932 if (ret) {
2933 mlog_errno(ret);
2934 break;
2935 }
2936
970e4936 2937
e2356a3f
JB		 2938 xe_name = bucket_block(bucket, block_off) + new_offset;
2939 if (!memcmp(name, xe_name, name_len)) {
589dc260
TM		 2940 *xe_index = i;
2941 *found = 1;
2942 ret = 0;
2943 break;
2944 }
2945 }
2946
2947 return ret;
2948}
2949
2950/*
2951 * Find the specified xattr entry in a series of buckets.
2952 * This series start from p_blkno and last for num_clusters.
2953 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
2954 * the num of the valid buckets.
2955 *
2956 * Return the buffer_head this xattr should reside in. And if the xattr's
2957 * hash is in the gap of 2 buckets, return the lower bucket.
2958 */
2959static int ocfs2_xattr_bucket_find(struct inode *inode,
2960 int name_index,
2961 const char *name,
2962 u32 name_hash,
2963 u64 p_blkno,
2964 u32 first_hash,
2965 u32 num_clusters,
2966 struct ocfs2_xattr_search *xs)
2967{
2968 int ret, found = 0;
589dc260
TM		 2969 struct ocfs2_xattr_header *xh = NULL;
2970 struct ocfs2_xattr_entry *xe = NULL;
2971 u16 index = 0;
2972 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
2973 int low_bucket = 0, bucket, high_bucket;
e2356a3f 2974 struct ocfs2_xattr_bucket *search;
589dc260 2975 u32 last_hash;
e2356a3f 2976 u64 blkno, lower_blkno = 0;
589dc260 2977
e2356a3f
JB		 2978 search = ocfs2_xattr_bucket_new(inode);
2979 if (!search) {
2980 ret = -ENOMEM;
2981 mlog_errno(ret);
2982 goto out;
2983 }
2984
2985 ret = ocfs2_read_xattr_bucket(search, p_blkno);
589dc260
TM		 2986 if (ret) {
2987 mlog_errno(ret);
2988 goto out;
2989 }
2990
e2356a3f 2991 xh = bucket_xh(search);
589dc260 2992 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
589dc260 2993 while (low_bucket <= high_bucket) {
e2356a3f 2994 ocfs2_xattr_bucket_relse(search);
589dc260 2995
e2356a3f 2996 bucket = (low_bucket + high_bucket) / 2;
589dc260 2997 blkno = p_blkno + bucket * blk_per_bucket;
e2356a3f 2998 ret = ocfs2_read_xattr_bucket(search, blkno);
589dc260
TM		 2999 if (ret) {
3000 mlog_errno(ret);
3001 goto out;
3002 }
3003
e2356a3f 3004 xh = bucket_xh(search);
589dc260
TM		 3005 xe = &xh->xh_entries[0];
3006 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
3007 high_bucket = bucket - 1;
3008 continue;
3009 }
3010
3011 /*
3012 * Check whether the hash of the last entry in our
5a095611
TM		 3013 * bucket is larger than the search one. for an empty
3014 * bucket, the last one is also the first one.
589dc260 3015 */
5a095611
TM		 3016 if (xh->xh_count)
3017 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
3018
589dc260
TM		 3019 last_hash = le32_to_cpu(xe->xe_name_hash);
3020
e2356a3f
JB		 3021 /* record lower_blkno which may be the insert place. */
3022 lower_blkno = blkno;
589dc260
TM		 3023
3024 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
3025 low_bucket = bucket + 1;
3026 continue;
3027 }
3028
3029 /* the searched xattr should reside in this bucket if exists. */
e2356a3f 3030 ret = ocfs2_find_xe_in_bucket(inode, search,
589dc260
TM		 3031 name_index, name, name_hash,
3032 &index, &found);
3033 if (ret) {
3034 mlog_errno(ret);
3035 goto out;
3036 }
3037 break;
3038 }
3039
3040 /*
3041 * Record the bucket we have found.
3042 * When the xattr's hash value is in the gap of 2 buckets, we will
3043 * always set it to the previous bucket.
3044 */
e2356a3f
JB		 3045 if (!lower_blkno)
3046 lower_blkno = p_blkno;
3047
3048 /* This should be in cache - we just read it during the search */
3049 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3050 if (ret) {
3051 mlog_errno(ret);
3052 goto out;
589dc260 3053 }
589dc260 3054
ba937127
JB		 3055 xs->header = bucket_xh(xs->bucket);
3056 xs->base = bucket_block(xs->bucket, 0);
589dc260
TM		 3057 xs->end = xs->base + inode->i_sb->s_blocksize;
3058
3059 if (found) {
589dc260
TM		 3060 xs->here = &xs->header->xh_entries[index];
3061 mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name,
ba937127 3062 (unsigned long long)bucket_blkno(xs->bucket), index);
589dc260
TM		 3063 } else
3064 ret = -ENODATA;
3065
3066out:
e2356a3f 3067 ocfs2_xattr_bucket_free(search);
589dc260
TM		 3068 return ret;
3069}
3070
3071static int ocfs2_xattr_index_block_find(struct inode *inode,
3072 struct buffer_head *root_bh,
3073 int name_index,
3074 const char *name,
3075 struct ocfs2_xattr_search *xs)
3076{
3077 int ret;
3078 struct ocfs2_xattr_block *xb =
3079 (struct ocfs2_xattr_block *)root_bh->b_data;
3080 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3081 struct ocfs2_extent_list *el = &xb_root->xt_list;
3082 u64 p_blkno = 0;
3083 u32 first_hash, num_clusters = 0;
2057e5c6 3084 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
589dc260
TM		 3085
3086 if (le16_to_cpu(el->l_next_free_rec) == 0)
3087 return -ENODATA;
3088
3089 mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n",
3090 name, name_hash, name_index);
3091
3092 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3093 &num_clusters, el);
3094 if (ret) {
3095 mlog_errno(ret);
3096 goto out;
3097 }
3098
3099 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3100
3101 mlog(0, "find xattr extent rec %u clusters from %llu, the first hash "
de29c085
MF		 3102 "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno,
3103 first_hash);
589dc260
TM		 3104
3105 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3106 p_blkno, first_hash, num_clusters, xs);
3107
3108out:
3109 return ret;
3110}
3111
0c044f0b
TM		 3112static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3113 u64 blkno,
3114 u32 clusters,
3115 xattr_bucket_func *func,
3116 void *para)
3117{
6dde41d9 3118 int i, ret = 0;
0c044f0b
TM		 3119 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3120 u32 num_buckets = clusters * bpc;
ba937127 3121 struct ocfs2_xattr_bucket *bucket;
0c044f0b 3122
ba937127
JB		 3123 bucket = ocfs2_xattr_bucket_new(inode);
3124 if (!bucket) {
3125 mlog_errno(-ENOMEM);
3126 return -ENOMEM;
3127 }
0c044f0b
TM		 3128
3129 mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n",
de29c085 3130 clusters, (unsigned long long)blkno);
0c044f0b 3131
ba937127
JB		 3132 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3133 ret = ocfs2_read_xattr_bucket(bucket, blkno);
0c044f0b
TM		 3134 if (ret) {
3135 mlog_errno(ret);
ba937127 3136 break;
0c044f0b
TM		 3137 }
3138
0c044f0b
TM		 3139 /*
3140 * The real bucket num in this series of blocks is stored
3141 * in the 1st bucket.
3142 */
3143 if (i == 0)
ba937127 3144 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
0c044f0b 3145
de29c085
MF		 3146 mlog(0, "iterating xattr bucket %llu, first hash %u\n",
3147 (unsigned long long)blkno,
ba937127 3148 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
0c044f0b 3149 if (func) {
ba937127
JB		 3150 ret = func(inode, bucket, para);
3151 if (ret)
0c044f0b 3152 mlog_errno(ret);
ba937127 3153 /* Fall through to bucket_relse() */
0c044f0b
TM		 3154 }
3155
ba937127
JB		 3156 ocfs2_xattr_bucket_relse(bucket);
3157 if (ret)
3158 break;
0c044f0b
TM		 3159 }
3160
ba937127 3161 ocfs2_xattr_bucket_free(bucket);
0c044f0b
TM		 3162 return ret;
3163}
3164
3165struct ocfs2_xattr_tree_list {
3166 char *buffer;
3167 size_t buffer_size;
936b8834 3168 size_t result;
0c044f0b
TM		 3169};
3170
3171static int ocfs2_xattr_bucket_get_name_value(struct inode *inode,
3172 struct ocfs2_xattr_header *xh,
3173 int index,
3174 int *block_off,
3175 int *new_offset)
3176{
3177 u16 name_offset;
3178
3179 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
3180 return -EINVAL;
3181
3182 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
3183
3184 *block_off = name_offset >> inode->i_sb->s_blocksize_bits;
3185 *new_offset = name_offset % inode->i_sb->s_blocksize;
3186
3187 return 0;
3188}
3189
3190static int ocfs2_list_xattr_bucket(struct inode *inode,
3191 struct ocfs2_xattr_bucket *bucket,
3192 void *para)
3193{
936b8834 3194 int ret = 0, type;
0c044f0b 3195 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
0c044f0b 3196 int i, block_off, new_offset;
936b8834 3197 const char *prefix, *name;
0c044f0b 3198
3e632946
JB		 3199 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
3200 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
936b8834
TM		 3201 type = ocfs2_xattr_get_type(entry);
3202 prefix = ocfs2_xattr_prefix(type);
0c044f0b 3203
936b8834 3204 if (prefix) {
0c044f0b 3205 ret = ocfs2_xattr_bucket_get_name_value(inode,
3e632946 3206 bucket_xh(bucket),
0c044f0b
TM		 3207 i,
3208 &block_off,
3209 &new_offset);
3210 if (ret)
3211 break;
936b8834 3212
51def39f 3213 name = (const char *)bucket_block(bucket, block_off) +
936b8834
TM		 3214 new_offset;
3215 ret = ocfs2_xattr_list_entry(xl->buffer,
3216 xl->buffer_size,
3217 &xl->result,
3218 prefix, name,
3219 entry->xe_name_len);
3220 if (ret)
3221 break;
0c044f0b
TM		 3222 }
3223 }
3224
3225 return ret;
3226}
3227
3228static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
3229 struct ocfs2_xattr_tree_root *xt,
3230 char *buffer,
3231 size_t buffer_size)
3232{
3233 struct ocfs2_extent_list *el = &xt->xt_list;
3234 int ret = 0;
3235 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
3236 u64 p_blkno = 0;
3237 struct ocfs2_xattr_tree_list xl = {
3238 .buffer = buffer,
3239 .buffer_size = buffer_size,
936b8834 3240 .result = 0,
0c044f0b
TM		 3241 };
3242
3243 if (le16_to_cpu(el->l_next_free_rec) == 0)
3244 return 0;
3245
3246 while (name_hash > 0) {
3247 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
3248 &e_cpos, &num_clusters, el);
3249 if (ret) {
3250 mlog_errno(ret);
3251 goto out;
3252 }
3253
3254 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
3255 ocfs2_list_xattr_bucket,
3256 &xl);
3257 if (ret) {
3258 mlog_errno(ret);
3259 goto out;
3260 }
3261
3262 if (e_cpos == 0)
3263 break;
3264
3265 name_hash = e_cpos - 1;
3266 }
3267
936b8834 3268 ret = xl.result;
0c044f0b
TM		 3269out:
3270 return ret;
3271}
01225596
TM		 3272
3273static int cmp_xe(const void *a, const void *b)
3274{
3275 const struct ocfs2_xattr_entry *l = a, *r = b;
3276 u32 l_hash = le32_to_cpu(l->xe_name_hash);
3277 u32 r_hash = le32_to_cpu(r->xe_name_hash);
3278
3279 if (l_hash > r_hash)
3280 return 1;
3281 if (l_hash < r_hash)
3282 return -1;
3283 return 0;
3284}
3285
3286static void swap_xe(void *a, void *b, int size)
3287{
3288 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
3289
3290 tmp = *l;
3291 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
3292 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
3293}
3294
3295/*
3296 * When the ocfs2_xattr_block is filled up, new bucket will be created
3297 * and all the xattr entries will be moved to the new bucket.
178eeac3
JB		 3298 * The header goes at the start of the bucket, and the names+values are
3299 * filled from the end. This is why *target starts as the last buffer.
01225596
TM		 3300 * Note: we need to sort the entries since they are not saved in order
3301 * in the ocfs2_xattr_block.
3302 */
3303static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
3304 struct buffer_head *xb_bh,
178eeac3 3305 struct ocfs2_xattr_bucket *bucket)
01225596
TM		 3306{
3307 int i, blocksize = inode->i_sb->s_blocksize;
178eeac3 3308 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596
TM		 3309 u16 offset, size, off_change;
3310 struct ocfs2_xattr_entry *xe;
3311 struct ocfs2_xattr_block *xb =
3312 (struct ocfs2_xattr_block *)xb_bh->b_data;
3313 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
178eeac3 3314 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 3315 u16 count = le16_to_cpu(xb_xh->xh_count);
178eeac3
JB		 3316 char *src = xb_bh->b_data;
3317 char *target = bucket_block(bucket, blks - 1);
01225596
TM		 3318
3319 mlog(0, "cp xattr from block %llu to bucket %llu\n",
3320 (unsigned long long)xb_bh->b_blocknr,
178eeac3
JB		 3321 (unsigned long long)bucket_blkno(bucket));
3322
3323 for (i = 0; i < blks; i++)
3324 memset(bucket_block(bucket, i), 0, blocksize);
01225596 3325
01225596
TM		 3326 /*
3327 * Since the xe_name_offset is based on ocfs2_xattr_header,
3328 * there is a offset change corresponding to the change of
3329 * ocfs2_xattr_header's position.
3330 */
3331 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3332 xe = &xb_xh->xh_entries[count - 1];
3333 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
3334 size = blocksize - offset;
3335
3336 /* copy all the names and values. */
01225596
TM		 3337 memcpy(target + offset, src + offset, size);
3338
3339 /* Init new header now. */
3340 xh->xh_count = xb_xh->xh_count;
3341 xh->xh_num_buckets = cpu_to_le16(1);
3342 xh->xh_name_value_len = cpu_to_le16(size);
3343 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
3344
3345 /* copy all the entries. */
178eeac3 3346 target = bucket_block(bucket, 0);
01225596
TM		 3347 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
3348 size = count * sizeof(struct ocfs2_xattr_entry);
3349 memcpy(target + offset, (char *)xb_xh + offset, size);
3350
3351 /* Change the xe offset for all the xe because of the move. */
3352 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
3353 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
3354 for (i = 0; i < count; i++)
3355 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
3356
3357 mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n",
3358 offset, size, off_change);
3359
3360 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
3361 cmp_xe, swap_xe);
3362}
3363
3364/*
3365 * After we move xattr from block to index btree, we have to
3366 * update ocfs2_xattr_search to the new xe and base.
3367 *
3368 * When the entry is in xattr block, xattr_bh indicates the storage place.
3369 * While if the entry is in index b-tree, "bucket" indicates the
3370 * real place of the xattr.
3371 */
178eeac3
JB		 3372static void ocfs2_xattr_update_xattr_search(struct inode *inode,
3373 struct ocfs2_xattr_search *xs,
3374 struct buffer_head *old_bh)
01225596 3375{
01225596
TM		 3376 char *buf = old_bh->b_data;
3377 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
3378 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
178eeac3 3379 int i;
01225596 3380
ba937127 3381 xs->header = bucket_xh(xs->bucket);
178eeac3 3382 xs->base = bucket_block(xs->bucket, 0);
01225596
TM		 3383 xs->end = xs->base + inode->i_sb->s_blocksize;
3384
178eeac3
JB		 3385 if (xs->not_found)
3386 return;
01225596 3387
178eeac3
JB		 3388 i = xs->here - old_xh->xh_entries;
3389 xs->here = &xs->header->xh_entries[i];
01225596
TM		 3390}
3391
3392static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 3393 struct ocfs2_xattr_search *xs,
3394 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 3395{
85db90e7 3396 int ret;
01225596
TM		 3397 u32 bit_off, len;
3398 u64 blkno;
85db90e7 3399 handle_t *handle = ctxt->handle;
01225596
TM		 3400 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3401 struct ocfs2_inode_info *oi = OCFS2_I(inode);
01225596
TM		 3402 struct buffer_head *xb_bh = xs->xattr_bh;
3403 struct ocfs2_xattr_block *xb =
3404 (struct ocfs2_xattr_block *)xb_bh->b_data;
3405 struct ocfs2_xattr_tree_root *xr;
3406 u16 xb_flags = le16_to_cpu(xb->xb_flags);
01225596
TM		 3407
3408 mlog(0, "create xattr index block for %llu\n",
3409 (unsigned long long)xb_bh->b_blocknr);
3410
3411 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
178eeac3 3412 BUG_ON(!xs->bucket);
01225596 3413
01225596
TM		 3414 /*
3415 * XXX:
3416 * We can use this lock for now, and maybe move to a dedicated mutex
3417 * if performance becomes a problem later.
3418 */
3419 down_write(&oi->ip_alloc_sem);
3420
84008972
JB		 3421 ret = ocfs2_journal_access_xb(handle, inode, xb_bh,
3422 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 3423 if (ret) {
3424 mlog_errno(ret);
85db90e7 3425 goto out;
01225596
TM		 3426 }
3427
78f30c31
TM		 3428 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
3429 1, 1, &bit_off, &len);
01225596
TM		 3430 if (ret) {
3431 mlog_errno(ret);
85db90e7 3432 goto out;
01225596
TM		 3433 }
3434
3435 /*
3436 * The bucket may spread in many blocks, and
3437 * we will only touch the 1st block and the last block
3438 * in the whole bucket(one for entry and one for data).
3439 */
3440 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
3441
de29c085
MF		 3442 mlog(0, "allocate 1 cluster from %llu to xattr block\n",
3443 (unsigned long long)blkno);
01225596 3444
178eeac3
JB		 3445 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno);
3446 if (ret) {
01225596 3447 mlog_errno(ret);
85db90e7 3448 goto out;
01225596
TM		 3449 }
3450
178eeac3
JB		 3451 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
3452 OCFS2_JOURNAL_ACCESS_CREATE);
01225596
TM		 3453 if (ret) {
3454 mlog_errno(ret);
85db90e7 3455 goto out;
01225596
TM		 3456 }
3457
178eeac3
JB		 3458 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
3459 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 3460
178eeac3 3461 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
01225596
TM		 3462
3463 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
3464 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
3465 offsetof(struct ocfs2_xattr_block, xb_attrs));
3466
3467 xr = &xb->xb_attrs.xb_root;
3468 xr->xt_clusters = cpu_to_le32(1);
3469 xr->xt_last_eb_blk = 0;
3470 xr->xt_list.l_tree_depth = 0;
3471 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
3472 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
3473
3474 xr->xt_list.l_recs[0].e_cpos = 0;
3475 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
3476 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
3477
3478 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
3479
85db90e7 3480 ocfs2_journal_dirty(handle, xb_bh);
01225596 3481
85db90e7 3482out:
01225596
TM		 3483 up_write(&oi->ip_alloc_sem);
3484
01225596
TM		 3485 return ret;
3486}
3487
3488static int cmp_xe_offset(const void *a, const void *b)
3489{
3490 const struct ocfs2_xattr_entry *l = a, *r = b;
3491 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
3492 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
3493
3494 if (l_name_offset < r_name_offset)
3495 return 1;
3496 if (l_name_offset > r_name_offset)
3497 return -1;
3498 return 0;
3499}
3500
3501/*
3502 * defrag a xattr bucket if we find that the bucket has some
3503 * holes beteen name/value pairs.
3504 * We will move all the name/value pairs to the end of the bucket
3505 * so that we can spare some space for insertion.
3506 */
3507static int ocfs2_defrag_xattr_bucket(struct inode *inode,
85db90e7 3508 handle_t *handle,
01225596
TM		 3509 struct ocfs2_xattr_bucket *bucket)
3510{
3511 int ret, i;
3512 size_t end, offset, len, value_len;
3513 struct ocfs2_xattr_header *xh;
3514 char *entries, *buf, *bucket_buf = NULL;
9c7759aa 3515 u64 blkno = bucket_blkno(bucket);
01225596 3516 u16 xh_free_start;
01225596 3517 size_t blocksize = inode->i_sb->s_blocksize;
01225596 3518 struct ocfs2_xattr_entry *xe;
01225596
TM		 3519
3520 /*
3521 * In order to make the operation more efficient and generic,
3522 * we copy all the blocks into a contiguous memory and do the
3523 * defragment there, so if anything is error, we will not touch
3524 * the real block.
3525 */
3526 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
3527 if (!bucket_buf) {
3528 ret = -EIO;
3529 goto out;
3530 }
3531
3532 buf = bucket_buf;
1c32a2fd
TM		 3533 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3534 memcpy(buf, bucket_block(bucket, i), blocksize);
01225596 3535
1c32a2fd 3536 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
161d6f30
JB		 3537 OCFS2_JOURNAL_ACCESS_WRITE);
3538 if (ret < 0) {
3539 mlog_errno(ret);
85db90e7 3540 goto out;
01225596
TM		 3541 }
3542
3543 xh = (struct ocfs2_xattr_header *)bucket_buf;
3544 entries = (char *)xh->xh_entries;
3545 xh_free_start = le16_to_cpu(xh->xh_free_start);
3546
3547 mlog(0, "adjust xattr bucket in %llu, count = %u, "
3548 "xh_free_start = %u, xh_name_value_len = %u.\n",
de29c085
MF		 3549 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
3550 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
01225596
TM		 3551
3552 /*
3553 * sort all the entries by their offset.
3554 * the largest will be the first, so that we can
3555 * move them to the end one by one.
3556 */
3557 sort(entries, le16_to_cpu(xh->xh_count),
3558 sizeof(struct ocfs2_xattr_entry),
3559 cmp_xe_offset, swap_xe);
3560
3561 /* Move all name/values to the end of the bucket. */
3562 xe = xh->xh_entries;
3563 end = OCFS2_XATTR_BUCKET_SIZE;
3564 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
3565 offset = le16_to_cpu(xe->xe_name_offset);
3566 if (ocfs2_xattr_is_local(xe))
3567 value_len = OCFS2_XATTR_SIZE(
3568 le64_to_cpu(xe->xe_value_size));
3569 else
3570 value_len = OCFS2_XATTR_ROOT_SIZE;
3571 len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len;
3572
3573 /*
3574 * We must make sure that the name/value pair
3575 * exist in the same block. So adjust end to
3576 * the previous block end if needed.
3577 */
3578 if (((end - len) / blocksize !=
3579 (end - 1) / blocksize))
3580 end = end - end % blocksize;
3581
3582 if (end > offset + len) {
3583 memmove(bucket_buf + end - len,
3584 bucket_buf + offset, len);
3585 xe->xe_name_offset = cpu_to_le16(end - len);
3586 }
3587
3588 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
3589 "bucket %llu\n", (unsigned long long)blkno);
3590
3591 end -= len;
3592 }
3593
3594 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
3595 "bucket %llu\n", (unsigned long long)blkno);
3596
3597 if (xh_free_start == end)
85db90e7 3598 goto out;
01225596
TM		 3599
3600 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
3601 xh->xh_free_start = cpu_to_le16(end);
3602
3603 /* sort the entries by their name_hash. */
3604 sort(entries, le16_to_cpu(xh->xh_count),
3605 sizeof(struct ocfs2_xattr_entry),
3606 cmp_xe, swap_xe);
3607
3608 buf = bucket_buf;
1c32a2fd
TM		 3609 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
3610 memcpy(bucket_block(bucket, i), buf, blocksize);
3611 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
01225596 3612
01225596 3613out:
01225596
TM		 3614 kfree(bucket_buf);
3615 return ret;
3616}
3617
3618/*
b5c03e74
JB		 3619 * prev_blkno points to the start of an existing extent. new_blkno
3620 * points to a newly allocated extent. Because we know each of our
3621 * clusters contains more than bucket, we can easily split one cluster
3622 * at a bucket boundary. So we take the last cluster of the existing
3623 * extent and split it down the middle. We move the last half of the
3624 * buckets in the last cluster of the existing extent over to the new
3625 * extent.
01225596 3626 *
b5c03e74
JB		 3627 * first_bh is the buffer at prev_blkno so we can update the existing
3628 * extent's bucket count. header_bh is the bucket were we were hoping
3629 * to insert our xattr. If the bucket move places the target in the new
3630 * extent, we'll update first_bh and header_bh after modifying the old
3631 * extent.
3632 *
3633 * first_hash will be set as the 1st xe's name_hash in the new extent.
01225596
TM		 3634 */
3635static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
3636 handle_t *handle,
41cb8148
JB		 3637 struct ocfs2_xattr_bucket *first,
3638 struct ocfs2_xattr_bucket *target,
01225596 3639 u64 new_blkno,
01225596
TM		 3640 u32 num_clusters,
3641 u32 *first_hash)
3642{
c58b6032 3643 int ret;
41cb8148
JB		 3644 struct super_block *sb = inode->i_sb;
3645 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
3646 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
b5c03e74 3647 int to_move = num_buckets / 2;
c58b6032 3648 u64 src_blkno;
41cb8148
JB		 3649 u64 last_cluster_blkno = bucket_blkno(first) +
3650 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
01225596 3651
41cb8148
JB		 3652 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
3653 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
01225596 3654
01225596 3655 mlog(0, "move half of xattrs in cluster %llu to %llu\n",
c58b6032 3656 (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno);
01225596 3657
41cb8148 3658 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
c58b6032
JB		 3659 last_cluster_blkno, new_blkno,
3660 to_move, first_hash);
01225596
TM		 3661 if (ret) {
3662 mlog_errno(ret);
3663 goto out;
3664 }
3665
c58b6032
JB		 3666 /* This is the first bucket that got moved */
3667 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
01225596 3668
b5c03e74 3669 /*
c58b6032 3670 * If the target bucket was part of the moved buckets, we need to
41cb8148 3671 * update first and target.
b5c03e74 3672 */
41cb8148 3673 if (bucket_blkno(target) >= src_blkno) {
b5c03e74
JB		 3674 /* Find the block for the new target bucket */
3675 src_blkno = new_blkno +
41cb8148
JB		 3676 (bucket_blkno(target) - src_blkno);
3677
3678 ocfs2_xattr_bucket_relse(first);
3679 ocfs2_xattr_bucket_relse(target);
01225596 3680
b5c03e74 3681 /*
c58b6032 3682 * These shouldn't fail - the buffers are in the
b5c03e74
JB		 3683 * journal from ocfs2_cp_xattr_bucket().
3684 */
41cb8148 3685 ret = ocfs2_read_xattr_bucket(first, new_blkno);
c58b6032
JB		 3686 if (ret) {
3687 mlog_errno(ret);
3688 goto out;
3689 }
41cb8148
JB		 3690 ret = ocfs2_read_xattr_bucket(target, src_blkno);
3691 if (ret)
b5c03e74 3692 mlog_errno(ret);
01225596 3693
01225596
TM		 3694 }
3695
01225596 3696out:
01225596
TM		 3697 return ret;
3698}
3699
01225596 3700/*
80bcaf34
TM		 3701 * Find the suitable pos when we divide a bucket into 2.
3702 * We have to make sure the xattrs with the same hash value exist
3703 * in the same bucket.
3704 *
3705 * If this ocfs2_xattr_header covers more than one hash value, find a
3706 * place where the hash value changes. Try to find the most even split.
3707 * The most common case is that all entries have different hash values,
3708 * and the first check we make will find a place to split.
3709 */
3710static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
3711{
3712 struct ocfs2_xattr_entry *entries = xh->xh_entries;
3713 int count = le16_to_cpu(xh->xh_count);
3714 int delta, middle = count / 2;
3715
3716 /*
3717 * We start at the middle. Each step gets farther away in both
3718 * directions. We therefore hit the change in hash value
3719 * nearest to the middle. Note that this loop does not execute for
3720 * count < 2.
3721 */
3722 for (delta = 0; delta < middle; delta++) {
3723 /* Let's check delta earlier than middle */
3724 if (cmp_xe(&entries[middle - delta - 1],
3725 &entries[middle - delta]))
3726 return middle - delta;
3727
3728 /* For even counts, don't walk off the end */
3729 if ((middle + delta + 1) == count)
3730 continue;
3731
3732 /* Now try delta past middle */
3733 if (cmp_xe(&entries[middle + delta],
3734 &entries[middle + delta + 1]))
3735 return middle + delta + 1;
3736 }
3737
3738 /* Every entry had the same hash */
3739 return count;
3740}
3741
3742/*
3743 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
01225596 3744 * first_hash will record the 1st hash of the new bucket.
80bcaf34
TM		 3745 *
3746 * Normally half of the xattrs will be moved. But we have to make
3747 * sure that the xattrs with the same hash value are stored in the
3748 * same bucket. If all the xattrs in this bucket have the same hash
3749 * value, the new bucket will be initialized as an empty one and the
3750 * first_hash will be initialized as (hash_value+1).
01225596 3751 */
80bcaf34
TM		 3752static int ocfs2_divide_xattr_bucket(struct inode *inode,
3753 handle_t *handle,
3754 u64 blk,
3755 u64 new_blk,
3756 u32 *first_hash,
3757 int new_bucket_head)
01225596
TM		 3758{
3759 int ret, i;
80bcaf34 3760 int count, start, len, name_value_len = 0, xe_len, name_offset = 0;
ba937127 3761 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 3762 struct ocfs2_xattr_header *xh;
3763 struct ocfs2_xattr_entry *xe;
3764 int blocksize = inode->i_sb->s_blocksize;
3765
80bcaf34 3766 mlog(0, "move some of xattrs from bucket %llu to %llu\n",
de29c085 3767 (unsigned long long)blk, (unsigned long long)new_blk);
01225596 3768
ba937127
JB		 3769 s_bucket = ocfs2_xattr_bucket_new(inode);
3770 t_bucket = ocfs2_xattr_bucket_new(inode);
3771 if (!s_bucket || !t_bucket) {
3772 ret = -ENOMEM;
3773 mlog_errno(ret);
3774 goto out;
3775 }
01225596 3776
ba937127 3777 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
01225596
TM		 3778 if (ret) {
3779 mlog_errno(ret);
3780 goto out;
3781 }
3782
ba937127 3783 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
1224be02 3784 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 3785 if (ret) {
3786 mlog_errno(ret);
3787 goto out;
3788 }
3789
784b816a
JB		 3790 /*
3791 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
3792 * there's no need to read it.
3793 */
ba937127 3794 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk);
01225596
TM		 3795 if (ret) {
3796 mlog_errno(ret);
3797 goto out;
3798 }
3799
2b656c1d
JB		 3800 /*
3801 * Hey, if we're overwriting t_bucket, what difference does
3802 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
3803 * same part of ocfs2_cp_xattr_bucket().
3804 */
ba937127 3805 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 3806 new_bucket_head ?
3807 OCFS2_JOURNAL_ACCESS_CREATE :
3808 OCFS2_JOURNAL_ACCESS_WRITE);
3809 if (ret) {
3810 mlog_errno(ret);
3811 goto out;
01225596
TM		 3812 }
3813
ba937127 3814 xh = bucket_xh(s_bucket);
80bcaf34
TM		 3815 count = le16_to_cpu(xh->xh_count);
3816 start = ocfs2_xattr_find_divide_pos(xh);
3817
3818 if (start == count) {
3819 xe = &xh->xh_entries[start-1];
3820
3821 /*
3822 * initialized a new empty bucket here.
3823 * The hash value is set as one larger than
3824 * that of the last entry in the previous bucket.
3825 */
ba937127
JB		 3826 for (i = 0; i < t_bucket->bu_blocks; i++)
3827 memset(bucket_block(t_bucket, i), 0, blocksize);
80bcaf34 3828
ba937127 3829 xh = bucket_xh(t_bucket);
80bcaf34
TM		 3830 xh->xh_free_start = cpu_to_le16(blocksize);
3831 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
3832 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
3833
3834 goto set_num_buckets;
3835 }
3836
01225596 3837 /* copy the whole bucket to the new first. */
ba937127 3838 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
01225596
TM		 3839
3840 /* update the new bucket. */
ba937127 3841 xh = bucket_xh(t_bucket);
01225596
TM		 3842
3843 /*
3844 * Calculate the total name/value len and xh_free_start for
3845 * the old bucket first.
3846 */
3847 name_offset = OCFS2_XATTR_BUCKET_SIZE;
3848 name_value_len = 0;
3849 for (i = 0; i < start; i++) {
3850 xe = &xh->xh_entries[i];
3851 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3852 if (ocfs2_xattr_is_local(xe))
3853 xe_len +=
3854 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3855 else
3856 xe_len += OCFS2_XATTR_ROOT_SIZE;
3857 name_value_len += xe_len;
3858 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
3859 name_offset = le16_to_cpu(xe->xe_name_offset);
3860 }
3861
3862 /*
3863 * Now begin the modification to the new bucket.
3864 *
3865 * In the new bucket, We just move the xattr entry to the beginning
3866 * and don't touch the name/value. So there will be some holes in the
3867 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
3868 * called.
3869 */
3870 xe = &xh->xh_entries[start];
3871 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
3872 mlog(0, "mv xattr entry len %d from %d to %d\n", len,
ff1ec20e
MF		 3873 (int)((char *)xe - (char *)xh),
3874 (int)((char *)xh->xh_entries - (char *)xh));
01225596
TM		 3875 memmove((char *)xh->xh_entries, (char *)xe, len);
3876 xe = &xh->xh_entries[count - start];
3877 len = sizeof(struct ocfs2_xattr_entry) * start;
3878 memset((char *)xe, 0, len);
3879
3880 le16_add_cpu(&xh->xh_count, -start);
3881 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
3882
3883 /* Calculate xh_free_start for the new bucket. */
3884 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
3885 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3886 xe = &xh->xh_entries[i];
3887 xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3888 if (ocfs2_xattr_is_local(xe))
3889 xe_len +=
3890 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
3891 else
3892 xe_len += OCFS2_XATTR_ROOT_SIZE;
3893 if (le16_to_cpu(xe->xe_name_offset) <
3894 le16_to_cpu(xh->xh_free_start))
3895 xh->xh_free_start = xe->xe_name_offset;
3896 }
3897
80bcaf34 3898set_num_buckets:
01225596
TM		 3899 /* set xh->xh_num_buckets for the new xh. */
3900 if (new_bucket_head)
3901 xh->xh_num_buckets = cpu_to_le16(1);
3902 else
3903 xh->xh_num_buckets = 0;
3904
ba937127 3905 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 3906
3907 /* store the first_hash of the new bucket. */
3908 if (first_hash)
3909 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
3910
3911 /*
80bcaf34
TM		 3912 * Now only update the 1st block of the old bucket. If we
3913 * just added a new empty bucket, there is no need to modify
3914 * it.
01225596 3915 */
80bcaf34
TM		 3916 if (start == count)
3917 goto out;
3918
ba937127 3919 xh = bucket_xh(s_bucket);
01225596
TM		 3920 memset(&xh->xh_entries[start], 0,
3921 sizeof(struct ocfs2_xattr_entry) * (count - start));
3922 xh->xh_count = cpu_to_le16(start);
3923 xh->xh_free_start = cpu_to_le16(name_offset);
3924 xh->xh_name_value_len = cpu_to_le16(name_value_len);
3925
ba937127 3926 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
01225596
TM		 3927
3928out:
ba937127
JB		 3929 ocfs2_xattr_bucket_free(s_bucket);
3930 ocfs2_xattr_bucket_free(t_bucket);
01225596
TM		 3931
3932 return ret;
3933}
3934
3935/*
3936 * Copy xattr from one bucket to another bucket.
3937 *
3938 * The caller must make sure that the journal transaction
3939 * has enough space for journaling.
3940 */
3941static int ocfs2_cp_xattr_bucket(struct inode *inode,
3942 handle_t *handle,
3943 u64 s_blkno,
3944 u64 t_blkno,
3945 int t_is_new)
3946{
4980c6da 3947 int ret;
ba937127 3948 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 3949
3950 BUG_ON(s_blkno == t_blkno);
3951
3952 mlog(0, "cp bucket %llu to %llu, target is %d\n",
de29c085
MF		 3953 (unsigned long long)s_blkno, (unsigned long long)t_blkno,
3954 t_is_new);
01225596 3955
ba937127
JB		 3956 s_bucket = ocfs2_xattr_bucket_new(inode);
3957 t_bucket = ocfs2_xattr_bucket_new(inode);
3958 if (!s_bucket || !t_bucket) {
3959 ret = -ENOMEM;
3960 mlog_errno(ret);
3961 goto out;
3962 }
92de109a 3963
ba937127 3964 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
01225596
TM		 3965 if (ret)
3966 goto out;
3967
784b816a
JB		 3968 /*
3969 * Even if !t_is_new, we're overwriting t_bucket. Thus,
3970 * there's no need to read it.
3971 */
ba937127 3972 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno);
01225596
TM		 3973 if (ret)
3974 goto out;
3975
2b656c1d
JB		 3976 /*
3977 * Hey, if we're overwriting t_bucket, what difference does
3978 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
874d65af
JB		 3979 * cluster to fill, we came here from
3980 * ocfs2_mv_xattr_buckets(), and it is really new -
3981 * ACCESS_CREATE is required. But we also might have moved data
3982 * out of t_bucket before extending back into it.
3983 * ocfs2_add_new_xattr_bucket() can do this - its call to
3984 * ocfs2_add_new_xattr_cluster() may have created a new extent
2b656c1d
JB		 3985 * and copied out the end of the old extent. Then it re-extends
3986 * the old extent back to create space for new xattrs. That's
3987 * how we get here, and the bucket isn't really new.
3988 */
ba937127 3989 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 3990 t_is_new ?
3991 OCFS2_JOURNAL_ACCESS_CREATE :
3992 OCFS2_JOURNAL_ACCESS_WRITE);
3993 if (ret)
3994 goto out;
01225596 3995
ba937127
JB		 3996 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
3997 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 3998
3999out:
ba937127
JB		 4000 ocfs2_xattr_bucket_free(t_bucket);
4001 ocfs2_xattr_bucket_free(s_bucket);
01225596
TM		 4002
4003 return ret;
4004}
4005
4006/*
874d65af
JB		 4007 * src_blk points to the start of an existing extent. last_blk points to
4008 * last cluster in that extent. to_blk points to a newly allocated
54ecb6b6
JB		 4009 * extent. We copy the buckets from the cluster at last_blk to the new
4010 * extent. If start_bucket is non-zero, we skip that many buckets before
4011 * we start copying. The new extent's xh_num_buckets gets set to the
4012 * number of buckets we copied. The old extent's xh_num_buckets shrinks
4013 * by the same amount.
01225596 4014 */
54ecb6b6
JB		 4015static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
4016 u64 src_blk, u64 last_blk, u64 to_blk,
4017 unsigned int start_bucket,
4018 u32 *first_hash)
01225596
TM		 4019{
4020 int i, ret, credits;
4021 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
15d60929 4022 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596 4023 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
15d60929 4024 struct ocfs2_xattr_bucket *old_first, *new_first;
01225596 4025
874d65af
JB		 4026 mlog(0, "mv xattrs from cluster %llu to %llu\n",
4027 (unsigned long long)last_blk, (unsigned long long)to_blk);
01225596 4028
54ecb6b6
JB		 4029 BUG_ON(start_bucket >= num_buckets);
4030 if (start_bucket) {
4031 num_buckets -= start_bucket;
4032 last_blk += (start_bucket * blks_per_bucket);
4033 }
4034
15d60929
JB		 4035 /* The first bucket of the original extent */
4036 old_first = ocfs2_xattr_bucket_new(inode);
4037 /* The first bucket of the new extent */
4038 new_first = ocfs2_xattr_bucket_new(inode);
4039 if (!old_first || !new_first) {
4040 ret = -ENOMEM;
4041 mlog_errno(ret);
4042 goto out;
4043 }
4044
874d65af 4045 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
15d60929
JB		 4046 if (ret) {
4047 mlog_errno(ret);
4048 goto out;
4049 }
4050
01225596 4051 /*
54ecb6b6
JB		 4052 * We need to update the first bucket of the old extent and all
4053 * the buckets going to the new extent.
01225596 4054 */
54ecb6b6
JB		 4055 credits = ((num_buckets + 1) * blks_per_bucket) +
4056 handle->h_buffer_credits;
01225596
TM		 4057 ret = ocfs2_extend_trans(handle, credits);
4058 if (ret) {
4059 mlog_errno(ret);
4060 goto out;
4061 }
4062
15d60929
JB		 4063 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4064 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4065 if (ret) {
4066 mlog_errno(ret);
4067 goto out;
4068 }
4069
4070 for (i = 0; i < num_buckets; i++) {
4071 ret = ocfs2_cp_xattr_bucket(inode, handle,
874d65af 4072 last_blk + (i * blks_per_bucket),
15d60929
JB		 4073 to_blk + (i * blks_per_bucket),
4074 1);
01225596
TM		 4075 if (ret) {
4076 mlog_errno(ret);
4077 goto out;
4078 }
01225596
TM		 4079 }
4080
15d60929
JB		 4081 /*
4082 * Get the new bucket ready before we dirty anything
4083 * (This actually shouldn't fail, because we already dirtied
4084 * it once in ocfs2_cp_xattr_bucket()).
4085 */
4086 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4087 if (ret) {
01225596
TM		 4088 mlog_errno(ret);
4089 goto out;
4090 }
15d60929
JB		 4091 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4092 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4093 if (ret) {
4094 mlog_errno(ret);
4095 goto out;
4096 }
4097
15d60929
JB		 4098 /* Now update the headers */
4099 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4100 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
01225596 4101
15d60929
JB		 4102 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4103 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
01225596
TM		 4104
4105 if (first_hash)
15d60929
JB		 4106 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4107
01225596 4108out:
15d60929
JB		 4109 ocfs2_xattr_bucket_free(new_first);
4110 ocfs2_xattr_bucket_free(old_first);
01225596
TM		 4111 return ret;
4112}
4113
4114/*
80bcaf34 4115 * Move some xattrs in this cluster to the new cluster.
01225596
TM		 4116 * This function should only be called when bucket size == cluster size.
4117 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4118 */
80bcaf34
TM		 4119static int ocfs2_divide_xattr_cluster(struct inode *inode,
4120 handle_t *handle,
4121 u64 prev_blk,
4122 u64 new_blk,
4123 u32 *first_hash)
01225596
TM		 4124{
4125 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
85db90e7 4126 int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits;
01225596
TM		 4127
4128 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4129
4130 ret = ocfs2_extend_trans(handle, credits);
4131 if (ret) {
4132 mlog_errno(ret);
4133 return ret;
4134 }
4135
4136 /* Move half of the xattr in start_blk to the next bucket. */
80bcaf34
TM		 4137 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4138 new_blk, first_hash, 1);
01225596
TM		 4139}
4140
4141/*
4142 * Move some xattrs from the old cluster to the new one since they are not
4143 * contiguous in ocfs2 xattr tree.
4144 *
4145 * new_blk starts a new separate cluster, and we will move some xattrs from
4146 * prev_blk to it. v_start will be set as the first name hash value in this
4147 * new cluster so that it can be used as e_cpos during tree insertion and
4148 * don't collide with our original b-tree operations. first_bh and header_bh
4149 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
4150 * to extend the insert bucket.
4151 *
4152 * The problem is how much xattr should we move to the new one and when should
4153 * we update first_bh and header_bh?
4154 * 1. If cluster size > bucket size, that means the previous cluster has more
4155 * than 1 bucket, so just move half nums of bucket into the new cluster and
4156 * update the first_bh and header_bh if the insert bucket has been moved
4157 * to the new cluster.
4158 * 2. If cluster_size == bucket_size:
4159 * a) If the previous extent rec has more than one cluster and the insert
4160 * place isn't in the last cluster, copy the entire last cluster to the
4161 * new one. This time, we don't need to upate the first_bh and header_bh
4162 * since they will not be moved into the new cluster.
4163 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
4164 * the new one. And we set the extend flag to zero if the insert place is
4165 * moved into the new allocated cluster since no extend is needed.
4166 */
4167static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
4168 handle_t *handle,
012ee910
JB		 4169 struct ocfs2_xattr_bucket *first,
4170 struct ocfs2_xattr_bucket *target,
01225596 4171 u64 new_blk,
01225596
TM		 4172 u32 prev_clusters,
4173 u32 *v_start,
4174 int *extend)
4175{
92cf3adf 4176 int ret;
01225596
TM		 4177
4178 mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n",
012ee910 4179 (unsigned long long)bucket_blkno(first), prev_clusters,
de29c085 4180 (unsigned long long)new_blk);
01225596 4181
41cb8148 4182 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
01225596
TM		 4183 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
4184 handle,
41cb8148 4185 first, target,
01225596 4186 new_blk,
01225596
TM		 4187 prev_clusters,
4188 v_start);
012ee910 4189 if (ret)
41cb8148 4190 mlog_errno(ret);
41cb8148 4191 } else {
92cf3adf
JB		 4192 /* The start of the last cluster in the first extent */
4193 u64 last_blk = bucket_blkno(first) +
4194 ((prev_clusters - 1) *
4195 ocfs2_clusters_to_blocks(inode->i_sb, 1));
01225596 4196
012ee910 4197 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
874d65af 4198 ret = ocfs2_mv_xattr_buckets(inode, handle,
92cf3adf 4199 bucket_blkno(first),
54ecb6b6 4200 last_blk, new_blk, 0,
01225596 4201 v_start);
012ee910
JB		 4202 if (ret)
4203 mlog_errno(ret);
4204 } else {
80bcaf34
TM		 4205 ret = ocfs2_divide_xattr_cluster(inode, handle,
4206 last_blk, new_blk,
4207 v_start);
012ee910
JB		 4208 if (ret)
4209 mlog_errno(ret);
01225596 4210
92cf3adf 4211 if ((bucket_blkno(target) == last_blk) && extend)
01225596
TM		 4212 *extend = 0;
4213 }
4214 }
4215
4216 return ret;
4217}
4218
4219/*
4220 * Add a new cluster for xattr storage.
4221 *
4222 * If the new cluster is contiguous with the previous one, it will be
4223 * appended to the same extent record, and num_clusters will be updated.
4224 * If not, we will insert a new extent for it and move some xattrs in
4225 * the last cluster into the new allocated one.
4226 * We also need to limit the maximum size of a btree leaf, otherwise we'll
4227 * lose the benefits of hashing because we'll have to search large leaves.
4228 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
4229 * if it's bigger).
4230 *
4231 * first_bh is the first block of the previous extent rec and header_bh
4232 * indicates the bucket we will insert the new xattrs. They will be updated
4233 * when the header_bh is moved into the new cluster.
4234 */
4235static int ocfs2_add_new_xattr_cluster(struct inode *inode,
4236 struct buffer_head *root_bh,
ed29c0ca
JB		 4237 struct ocfs2_xattr_bucket *first,
4238 struct ocfs2_xattr_bucket *target,
01225596
TM		 4239 u32 *num_clusters,
4240 u32 prev_cpos,
78f30c31
TM		 4241 int *extend,
4242 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4243{
85db90e7 4244 int ret;
01225596
TM		 4245 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
4246 u32 prev_clusters = *num_clusters;
4247 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
4248 u64 block;
85db90e7 4249 handle_t *handle = ctxt->handle;
01225596 4250 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
f99b9b7c 4251 struct ocfs2_extent_tree et;
01225596
TM		 4252
4253 mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, "
4254 "previous xattr blkno = %llu\n",
4255 (unsigned long long)OCFS2_I(inode)->ip_blkno,
ed29c0ca 4256 prev_cpos, (unsigned long long)bucket_blkno(first));
01225596 4257
8d6220d6 4258 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
f99b9b7c 4259
84008972
JB		 4260 ret = ocfs2_journal_access_xb(handle, inode, root_bh,
4261 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4262 if (ret < 0) {
4263 mlog_errno(ret);
4264 goto leave;
4265 }
4266
78f30c31 4267 ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
01225596
TM		 4268 clusters_to_add, &bit_off, &num_bits);
4269 if (ret < 0) {
4270 if (ret != -ENOSPC)
4271 mlog_errno(ret);
4272 goto leave;
4273 }
4274
4275 BUG_ON(num_bits > clusters_to_add);
4276
4277 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
4278 mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n",
4279 num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
4280
ed29c0ca 4281 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
01225596
TM		 4282 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
4283 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
4284 /*
4285 * If this cluster is contiguous with the old one and
4286 * adding this new cluster, we don't surpass the limit of
4287 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
4288 * initialized and used like other buckets in the previous
4289 * cluster.
4290 * So add it as a contiguous one. The caller will handle
4291 * its init process.
4292 */
4293 v_start = prev_cpos + prev_clusters;
4294 *num_clusters = prev_clusters + num_bits;
4295 mlog(0, "Add contiguous %u clusters to previous extent rec.\n",
4296 num_bits);
4297 } else {
4298 ret = ocfs2_adjust_xattr_cross_cluster(inode,
4299 handle,
012ee910
JB		 4300 first,
4301 target,
01225596 4302 block,
01225596
TM		 4303 prev_clusters,
4304 &v_start,
4305 extend);
4306 if (ret) {
4307 mlog_errno(ret);
4308 goto leave;
4309 }
4310 }
4311
4312 mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
de29c085 4313 num_bits, (unsigned long long)block, v_start);
f99b9b7c 4314 ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
78f30c31 4315 num_bits, 0, ctxt->meta_ac);
01225596
TM		 4316 if (ret < 0) {
4317 mlog_errno(ret);
4318 goto leave;
4319 }
4320
4321 ret = ocfs2_journal_dirty(handle, root_bh);
85db90e7 4322 if (ret < 0)
01225596 4323 mlog_errno(ret);
01225596
TM		 4324
4325leave:
01225596
TM		 4326 return ret;
4327}
4328
4329/*
92de109a
JB		 4330 * We are given an extent. 'first' is the bucket at the very front of
4331 * the extent. The extent has space for an additional bucket past
4332 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
4333 * of the target bucket. We wish to shift every bucket past the target
4334 * down one, filling in that additional space. When we get back to the
4335 * target, we split the target between itself and the now-empty bucket
4336 * at target+1 (aka, target_blkno + blks_per_bucket).
01225596
TM		 4337 */
4338static int ocfs2_extend_xattr_bucket(struct inode *inode,
85db90e7 4339 handle_t *handle,
92de109a
JB		 4340 struct ocfs2_xattr_bucket *first,
4341 u64 target_blk,
01225596
TM		 4342 u32 num_clusters)
4343{
4344 int ret, credits;
4345 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4346 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
92de109a
JB		 4347 u64 end_blk;
4348 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
01225596
TM		 4349
4350 mlog(0, "extend xattr bucket in %llu, xattr extend rec starting "
92de109a
JB		 4351 "from %llu, len = %u\n", (unsigned long long)target_blk,
4352 (unsigned long long)bucket_blkno(first), num_clusters);
01225596 4353
92de109a
JB		 4354 /* The extent must have room for an additional bucket */
4355 BUG_ON(new_bucket >=
4356 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
01225596 4357
92de109a
JB		 4358 /* end_blk points to the last existing bucket */
4359 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
01225596
TM		 4360
4361 /*
92de109a
JB		 4362 * end_blk is the start of the last existing bucket.
4363 * Thus, (end_blk - target_blk) covers the target bucket and
4364 * every bucket after it up to, but not including, the last
4365 * existing bucket. Then we add the last existing bucket, the
4366 * new bucket, and the first bucket (3 * blk_per_bucket).
01225596 4367 */
92de109a 4368 credits = (end_blk - target_blk) + (3 * blk_per_bucket) +
85db90e7
TM		 4369 handle->h_buffer_credits;
4370 ret = ocfs2_extend_trans(handle, credits);
4371 if (ret) {
01225596
TM		 4372 mlog_errno(ret);
4373 goto out;
4374 }
4375
92de109a
JB		 4376 ret = ocfs2_xattr_bucket_journal_access(handle, first,
4377 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4378 if (ret) {
4379 mlog_errno(ret);
85db90e7 4380 goto out;
01225596
TM		 4381 }
4382
92de109a 4383 while (end_blk != target_blk) {
01225596
TM		 4384 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
4385 end_blk + blk_per_bucket, 0);
4386 if (ret)
85db90e7 4387 goto out;
01225596
TM		 4388 end_blk -= blk_per_bucket;
4389 }
4390
92de109a
JB		 4391 /* Move half of the xattr in target_blkno to the next bucket. */
4392 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
4393 target_blk + blk_per_bucket, NULL, 0);
01225596 4394
92de109a
JB		 4395 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
4396 ocfs2_xattr_bucket_journal_dirty(handle, first);
01225596 4397
01225596
TM		 4398out:
4399 return ret;
4400}
4401
4402/*
91f2033f
JB		 4403 * Add new xattr bucket in an extent record and adjust the buckets
4404 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
4405 * bucket we want to insert into.
01225596 4406 *
91f2033f
JB		 4407 * In the easy case, we will move all the buckets after target down by
4408 * one. Half of target's xattrs will be moved to the next bucket.
4409 *
4410 * If current cluster is full, we'll allocate a new one. This may not
4411 * be contiguous. The underlying calls will make sure that there is
4412 * space for the insert, shifting buckets around if necessary.
4413 * 'target' may be moved by those calls.
01225596
TM		 4414 */
4415static int ocfs2_add_new_xattr_bucket(struct inode *inode,
4416 struct buffer_head *xb_bh,
91f2033f 4417 struct ocfs2_xattr_bucket *target,
78f30c31 4418 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4419{
01225596
TM		 4420 struct ocfs2_xattr_block *xb =
4421 (struct ocfs2_xattr_block *)xb_bh->b_data;
4422 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
4423 struct ocfs2_extent_list *el = &xb_root->xt_list;
91f2033f
JB		 4424 u32 name_hash =
4425 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
ed29c0ca 4426 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
01225596
TM		 4427 int ret, num_buckets, extend = 1;
4428 u64 p_blkno;
4429 u32 e_cpos, num_clusters;
92de109a 4430 /* The bucket at the front of the extent */
91f2033f 4431 struct ocfs2_xattr_bucket *first;
01225596 4432
91f2033f
JB		 4433 mlog(0, "Add new xattr bucket starting from %llu\n",
4434 (unsigned long long)bucket_blkno(target));
01225596 4435
ed29c0ca 4436 /* The first bucket of the original extent */
92de109a 4437 first = ocfs2_xattr_bucket_new(inode);
91f2033f 4438 if (!first) {
92de109a
JB		 4439 ret = -ENOMEM;
4440 mlog_errno(ret);
4441 goto out;
4442 }
4443
01225596
TM		 4444 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
4445 &num_clusters, el);
4446 if (ret) {
4447 mlog_errno(ret);
4448 goto out;
4449 }
4450
ed29c0ca 4451 ret = ocfs2_read_xattr_bucket(first, p_blkno);
01225596
TM		 4452 if (ret) {
4453 mlog_errno(ret);
4454 goto out;
4455 }
4456
ed29c0ca
JB		 4457 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
4458 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
4459 /*
4460 * This can move first+target if the target bucket moves
4461 * to the new extent.
4462 */
01225596
TM		 4463 ret = ocfs2_add_new_xattr_cluster(inode,
4464 xb_bh,
ed29c0ca
JB		 4465 first,
4466 target,
01225596
TM		 4467 &num_clusters,
4468 e_cpos,
78f30c31
TM		 4469 &extend,
4470 ctxt);
01225596
TM		 4471 if (ret) {
4472 mlog_errno(ret);
4473 goto out;
4474 }
4475 }
4476
92de109a 4477 if (extend) {
01225596 4478 ret = ocfs2_extend_xattr_bucket(inode,
85db90e7 4479 ctxt->handle,
ed29c0ca
JB		 4480 first,
4481 bucket_blkno(target),
01225596 4482 num_clusters);
92de109a
JB		 4483 if (ret)
4484 mlog_errno(ret);
4485 }
4486
01225596 4487out:
92de109a 4488 ocfs2_xattr_bucket_free(first);
ed29c0ca 4489
01225596
TM		 4490 return ret;
4491}
4492
4493static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
4494 struct ocfs2_xattr_bucket *bucket,
4495 int offs)
4496{
4497 int block_off = offs >> inode->i_sb->s_blocksize_bits;
4498
4499 offs = offs % inode->i_sb->s_blocksize;
51def39f 4500 return bucket_block(bucket, block_off) + offs;
01225596
TM		 4501}
4502
4503/*
4504 * Handle the normal xattr set, including replace, delete and new.
01225596
TM		 4505 *
4506 * Note: "local" indicates the real data's locality. So we can't
4507 * just its bucket locality by its length.
4508 */
4509static void ocfs2_xattr_set_entry_normal(struct inode *inode,
4510 struct ocfs2_xattr_info *xi,
4511 struct ocfs2_xattr_search *xs,
4512 u32 name_hash,
5a095611 4513 int local)
01225596
TM		 4514{
4515 struct ocfs2_xattr_entry *last, *xe;
4516 int name_len = strlen(xi->name);
4517 struct ocfs2_xattr_header *xh = xs->header;
4518 u16 count = le16_to_cpu(xh->xh_count), start;
4519 size_t blocksize = inode->i_sb->s_blocksize;
4520 char *val;
4521 size_t offs, size, new_size;
4522
4523 last = &xh->xh_entries[count];
4524 if (!xs->not_found) {
4525 xe = xs->here;
4526 offs = le16_to_cpu(xe->xe_name_offset);
4527 if (ocfs2_xattr_is_local(xe))
4528 size = OCFS2_XATTR_SIZE(name_len) +
4529 OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
4530 else
4531 size = OCFS2_XATTR_SIZE(name_len) +
4532 OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
4533
4534 /*
4535 * If the new value will be stored outside, xi->value has been
4536 * initalized as an empty ocfs2_xattr_value_root, and the same
4537 * goes with xi->value_len, so we can set new_size safely here.
4538 * See ocfs2_xattr_set_in_bucket.
4539 */
4540 new_size = OCFS2_XATTR_SIZE(name_len) +
4541 OCFS2_XATTR_SIZE(xi->value_len);
4542
4543 le16_add_cpu(&xh->xh_name_value_len, -size);
4544 if (xi->value) {
4545 if (new_size > size)
4546 goto set_new_name_value;
4547
4548 /* Now replace the old value with new one. */
4549 if (local)
4550 xe->xe_value_size = cpu_to_le64(xi->value_len);
4551 else
4552 xe->xe_value_size = 0;
4553
4554 val = ocfs2_xattr_bucket_get_val(inode,
ba937127 4555 xs->bucket, offs);
01225596
TM		 4556 memset(val + OCFS2_XATTR_SIZE(name_len), 0,
4557 size - OCFS2_XATTR_SIZE(name_len));
4558 if (OCFS2_XATTR_SIZE(xi->value_len) > 0)
4559 memcpy(val + OCFS2_XATTR_SIZE(name_len),
4560 xi->value, xi->value_len);
4561
4562 le16_add_cpu(&xh->xh_name_value_len, new_size);
4563 ocfs2_xattr_set_local(xe, local);
4564 return;
4565 } else {
5a095611
TM		 4566 /*
4567 * Remove the old entry if there is more than one.
4568 * We don't remove the last entry so that we can
4569 * use it to indicate the hash value of the empty
4570 * bucket.
4571 */
01225596 4572 last -= 1;
01225596 4573 le16_add_cpu(&xh->xh_count, -1);
5a095611
TM		 4574 if (xh->xh_count) {
4575 memmove(xe, xe + 1,
4576 (void *)last - (void *)xe);
4577 memset(last, 0,
4578 sizeof(struct ocfs2_xattr_entry));
4579 } else
4580 xh->xh_free_start =
4581 cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4582
01225596
TM		 4583 return;
4584 }
4585 } else {
4586 /* find a new entry for insert. */
4587 int low = 0, high = count - 1, tmp;
4588 struct ocfs2_xattr_entry *tmp_xe;
4589
5a095611 4590 while (low <= high && count) {
01225596
TM		 4591 tmp = (low + high) / 2;
4592 tmp_xe = &xh->xh_entries[tmp];
4593
4594 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
4595 low = tmp + 1;
4596 else if (name_hash <
4597 le32_to_cpu(tmp_xe->xe_name_hash))
4598 high = tmp - 1;
06b240d8
TM		 4599 else {
4600 low = tmp;
01225596 4601 break;
06b240d8 4602 }
01225596
TM		 4603 }
4604
4605 xe = &xh->xh_entries[low];
4606 if (low != count)
4607 memmove(xe + 1, xe, (void *)last - (void *)xe);
4608
4609 le16_add_cpu(&xh->xh_count, 1);
4610 memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
4611 xe->xe_name_hash = cpu_to_le32(name_hash);
4612 xe->xe_name_len = name_len;
4613 ocfs2_xattr_set_type(xe, xi->name_index);
4614 }
4615
4616set_new_name_value:
4617 /* Insert the new name+value. */
4618 size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len);
4619
4620 /*
4621 * We must make sure that the name/value pair
4622 * exists in the same block.
4623 */
4624 offs = le16_to_cpu(xh->xh_free_start);
4625 start = offs - size;
4626
4627 if (start >> inode->i_sb->s_blocksize_bits !=
4628 (offs - 1) >> inode->i_sb->s_blocksize_bits) {
4629 offs = offs - offs % blocksize;
4630 xh->xh_free_start = cpu_to_le16(offs);
4631 }
4632
ba937127 4633 val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
01225596
TM		 4634 xe->xe_name_offset = cpu_to_le16(offs - size);
4635
4636 memset(val, 0, size);
4637 memcpy(val, xi->name, name_len);
4638 memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len);
4639
4640 xe->xe_value_size = cpu_to_le64(xi->value_len);
4641 ocfs2_xattr_set_local(xe, local);
4642 xs->here = xe;
4643 le16_add_cpu(&xh->xh_free_start, -size);
4644 le16_add_cpu(&xh->xh_name_value_len, size);
4645
4646 return;
4647}
4648
01225596
TM		 4649/*
4650 * Set the xattr entry in the specified bucket.
4651 * The bucket is indicated by xs->bucket and it should have the enough
4652 * space for the xattr insertion.
4653 */
4654static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
85db90e7 4655 handle_t *handle,
01225596
TM		 4656 struct ocfs2_xattr_info *xi,
4657 struct ocfs2_xattr_search *xs,
4658 u32 name_hash,
5a095611 4659 int local)
01225596 4660{
1224be02 4661 int ret;
02dbf38d 4662 u64 blkno;
01225596 4663
ff1ec20e
MF		 4664 mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
4665 (unsigned long)xi->value_len, xi->name_index,
ba937127 4666 (unsigned long long)bucket_blkno(xs->bucket));
01225596 4667
ba937127 4668 if (!xs->bucket->bu_bhs[1]) {
02dbf38d
JB		 4669 blkno = bucket_blkno(xs->bucket);
4670 ocfs2_xattr_bucket_relse(xs->bucket);
4671 ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
01225596
TM		 4672 if (ret) {
4673 mlog_errno(ret);
4674 goto out;
4675 }
4676 }
4677
ba937127 4678 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
1224be02
JB		 4679 OCFS2_JOURNAL_ACCESS_WRITE);
4680 if (ret < 0) {
4681 mlog_errno(ret);
4682 goto out;
01225596
TM		 4683 }
4684
5a095611 4685 ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
ba937127 4686 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 4687
01225596 4688out:
01225596
TM		 4689 return ret;
4690}
4691
01225596
TM		 4692/*
4693 * Truncate the specified xe_off entry in xattr bucket.
4694 * bucket is indicated by header_bh and len is the new length.
4695 * Both the ocfs2_xattr_value_root and the entry will be updated here.
4696 *
4697 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
4698 */
4699static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
548b0f22 4700 struct ocfs2_xattr_bucket *bucket,
01225596 4701 int xe_off,
78f30c31
TM		 4702 int len,
4703 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4704{
4705 int ret, offset;
4706 u64 value_blk;
01225596 4707 struct ocfs2_xattr_entry *xe;
548b0f22 4708 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 4709 size_t blocksize = inode->i_sb->s_blocksize;
b3e5d379
JB		 4710 struct ocfs2_xattr_value_buf vb = {
4711 .vb_access = ocfs2_journal_access,
4712 };
01225596
TM		 4713
4714 xe = &xh->xh_entries[xe_off];
4715
4716 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
4717
4718 offset = le16_to_cpu(xe->xe_name_offset) +
4719 OCFS2_XATTR_SIZE(xe->xe_name_len);
4720
4721 value_blk = offset / blocksize;
4722
4723 /* We don't allow ocfs2_xattr_value to be stored in different block. */
4724 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
01225596 4725
b3e5d379
JB		 4726 vb.vb_bh = bucket->bu_bhs[value_blk];
4727 BUG_ON(!vb.vb_bh);
01225596 4728
b3e5d379
JB		 4729 vb.vb_xv = (struct ocfs2_xattr_value_root *)
4730 (vb.vb_bh->b_data + offset % blocksize);
01225596 4731
548b0f22
JB		 4732 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
4733 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4734 if (ret) {
4735 mlog_errno(ret);
4736 goto out;
4737 }
4738
548b0f22
JB		 4739 /*
4740 * From here on out we have to dirty the bucket. The generic
4741 * value calls only modify one of the bucket's bhs, but we need
4742 * to send the bucket at once. So if they error, they *could* have
4743 * modified something. We have to assume they did, and dirty
4744 * the whole bucket. This leaves us in a consistent state.
4745 */
4746 mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n",
4747 xe_off, (unsigned long long)bucket_blkno(bucket), len);
b3e5d379 4748 ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
01225596
TM		 4749 if (ret) {
4750 mlog_errno(ret);
548b0f22 4751 goto out_dirty;
01225596
TM		 4752 }
4753
548b0f22
JB		 4754 xe->xe_value_size = cpu_to_le64(len);
4755
4756out_dirty:
4757 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
4758
01225596 4759out:
01225596
TM		 4760 return ret;
4761}
4762
4763static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
78f30c31
TM		 4764 struct ocfs2_xattr_search *xs,
4765 int len,
4766 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 4767{
4768 int ret, offset;
4769 struct ocfs2_xattr_entry *xe = xs->here;
4770 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base;
4771
ba937127 4772 BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe));
01225596
TM		 4773
4774 offset = xe - xh->xh_entries;
548b0f22 4775 ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket,
78f30c31 4776 offset, len, ctxt);
01225596
TM		 4777 if (ret)
4778 mlog_errno(ret);
4779
4780 return ret;
4781}
4782
4783static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode,
85db90e7 4784 handle_t *handle,
01225596
TM		 4785 struct ocfs2_xattr_search *xs,
4786 char *val,
4787 int value_len)
4788{
4789 int offset;
4790 struct ocfs2_xattr_value_root *xv;
4791 struct ocfs2_xattr_entry *xe = xs->here;
4792
4793 BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe));
4794
4795 offset = le16_to_cpu(xe->xe_name_offset) +
4796 OCFS2_XATTR_SIZE(xe->xe_name_len);
4797
4798 xv = (struct ocfs2_xattr_value_root *)(xs->base + offset);
4799
85db90e7
TM		 4800 return __ocfs2_xattr_set_value_outside(inode, handle,
4801 xv, val, value_len);
01225596
TM		 4802}
4803
01225596
TM		 4804static int ocfs2_rm_xattr_cluster(struct inode *inode,
4805 struct buffer_head *root_bh,
4806 u64 blkno,
4807 u32 cpos,
4808 u32 len)
4809{
4810 int ret;
4811 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
4812 struct inode *tl_inode = osb->osb_tl_inode;
4813 handle_t *handle;
4814 struct ocfs2_xattr_block *xb =
4815 (struct ocfs2_xattr_block *)root_bh->b_data;
01225596
TM		 4816 struct ocfs2_alloc_context *meta_ac = NULL;
4817 struct ocfs2_cached_dealloc_ctxt dealloc;
f99b9b7c
JB		 4818 struct ocfs2_extent_tree et;
4819
8d6220d6 4820 ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh);
01225596
TM		 4821
4822 ocfs2_init_dealloc_ctxt(&dealloc);
4823
4824 mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n",
4825 cpos, len, (unsigned long long)blkno);
4826
4827 ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len);
4828
f99b9b7c 4829 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
01225596
TM		 4830 if (ret) {
4831 mlog_errno(ret);
4832 return ret;
4833 }
4834
4835 mutex_lock(&tl_inode->i_mutex);
4836
4837 if (ocfs2_truncate_log_needs_flush(osb)) {
4838 ret = __ocfs2_flush_truncate_log(osb);
4839 if (ret < 0) {
4840 mlog_errno(ret);
4841 goto out;
4842 }
4843 }
4844
a90714c1 4845 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
d3264799 4846 if (IS_ERR(handle)) {
01225596
TM		 4847 ret = -ENOMEM;
4848 mlog_errno(ret);
4849 goto out;
4850 }
4851
84008972
JB		 4852 ret = ocfs2_journal_access_xb(handle, inode, root_bh,
4853 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4854 if (ret) {
4855 mlog_errno(ret);
4856 goto out_commit;
4857 }
4858
f99b9b7c
JB		 4859 ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
4860 &dealloc);
01225596
TM		 4861 if (ret) {
4862 mlog_errno(ret);
4863 goto out_commit;
4864 }
4865
4866 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
4867
4868 ret = ocfs2_journal_dirty(handle, root_bh);
4869 if (ret) {
4870 mlog_errno(ret);
4871 goto out_commit;
4872 }
4873
4874 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
4875 if (ret)
4876 mlog_errno(ret);
4877
4878out_commit:
4879 ocfs2_commit_trans(osb, handle);
4880out:
4881 ocfs2_schedule_truncate_log_flush(osb, 1);
4882
4883 mutex_unlock(&tl_inode->i_mutex);
4884
4885 if (meta_ac)
4886 ocfs2_free_alloc_context(meta_ac);
4887
4888 ocfs2_run_deallocs(osb, &dealloc);
4889
4890 return ret;
4891}
4892
01225596 4893static void ocfs2_xattr_bucket_remove_xs(struct inode *inode,
85db90e7 4894 handle_t *handle,
01225596
TM		 4895 struct ocfs2_xattr_search *xs)
4896{
ba937127 4897 struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket);
01225596
TM		 4898 struct ocfs2_xattr_entry *last = &xh->xh_entries[
4899 le16_to_cpu(xh->xh_count) - 1];
4900 int ret = 0;
4901
ba937127 4902 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
1224be02 4903 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4904 if (ret) {
4905 mlog_errno(ret);
85db90e7 4906 return;
01225596
TM		 4907 }
4908
4909 /* Remove the old entry. */
4910 memmove(xs->here, xs->here + 1,
4911 (void *)last - (void *)xs->here);
4912 memset(last, 0, sizeof(struct ocfs2_xattr_entry));
4913 le16_add_cpu(&xh->xh_count, -1);
4914
ba937127 4915 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596
TM		 4916}
4917
4918/*
4919 * Set the xattr name/value in the bucket specified in xs.
4920 *
4921 * As the new value in xi may be stored in the bucket or in an outside cluster,
4922 * we divide the whole process into 3 steps:
4923 * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket)
4924 * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs)
4925 * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside)
4926 * 4. If the clusters for the new outside value can't be allocated, we need
4927 * to free the xattr we allocated in set.
4928 */
4929static int ocfs2_xattr_set_in_bucket(struct inode *inode,
4930 struct ocfs2_xattr_info *xi,
78f30c31
TM		 4931 struct ocfs2_xattr_search *xs,
4932 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4933{
5a095611 4934 int ret, local = 1;
01225596
TM		 4935 size_t value_len;
4936 char *val = (char *)xi->value;
4937 struct ocfs2_xattr_entry *xe = xs->here;
2057e5c6
TM		 4938 u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name,
4939 strlen(xi->name));
01225596
TM		 4940
4941 if (!xs->not_found && !ocfs2_xattr_is_local(xe)) {
4942 /*
4943 * We need to truncate the xattr storage first.
4944 *
4945 * If both the old and new value are stored to
4946 * outside block, we only need to truncate
4947 * the storage and then set the value outside.
4948 *
4949 * If the new value should be stored within block,
4950 * we should free all the outside block first and
4951 * the modification to the xattr block will be done
4952 * by following steps.
4953 */
4954 if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
4955 value_len = xi->value_len;
4956 else
4957 value_len = 0;
4958
4959 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
78f30c31
TM		 4960 value_len,
4961 ctxt);
01225596
TM		 4962 if (ret)
4963 goto out;
4964
4965 if (value_len)
4966 goto set_value_outside;
4967 }
4968
4969 value_len = xi->value_len;
4970 /* So we have to handle the inside block change now. */
4971 if (value_len > OCFS2_XATTR_INLINE_SIZE) {
4972 /*
4973 * If the new value will be stored outside of block,
4974 * initalize a new empty value root and insert it first.
4975 */
4976 local = 0;
4977 xi->value = &def_xv;
4978 xi->value_len = OCFS2_XATTR_ROOT_SIZE;
4979 }
4980
85db90e7
TM		 4981 ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs,
4982 name_hash, local);
01225596
TM		 4983 if (ret) {
4984 mlog_errno(ret);
4985 goto out;
4986 }
4987
5a095611
TM		 4988 if (value_len <= OCFS2_XATTR_INLINE_SIZE)
4989 goto out;
01225596 4990
5a095611
TM		 4991 /* allocate the space now for the outside block storage. */
4992 ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
78f30c31 4993 value_len, ctxt);
5a095611
TM		 4994 if (ret) {
4995 mlog_errno(ret);
4996
4997 if (xs->not_found) {
4998 /*
4999 * We can't allocate enough clusters for outside
5000 * storage and we have allocated xattr already,
5001 * so need to remove it.
5002 */
85db90e7 5003 ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs);
01225596 5004 }
01225596
TM		 5005 goto out;
5006 }
5007
5008set_value_outside:
85db90e7
TM		 5009 ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle,
5010 xs, val, value_len);
01225596
TM		 5011out:
5012 return ret;
5013}
5014
80bcaf34
TM		 5015/*
5016 * check whether the xattr bucket is filled up with the same hash value.
5017 * If we want to insert the xattr with the same hash, return -ENOSPC.
5018 * If we want to insert a xattr with different hash value, go ahead
5019 * and ocfs2_divide_xattr_bucket will handle this.
5020 */
01225596 5021static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
80bcaf34
TM		 5022 struct ocfs2_xattr_bucket *bucket,
5023 const char *name)
01225596 5024{
3e632946 5025 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
80bcaf34
TM		 5026 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
5027
5028 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
5029 return 0;
01225596
TM		 5030
5031 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
5032 xh->xh_entries[0].xe_name_hash) {
5033 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
5034 "hash = %u\n",
9c7759aa 5035 (unsigned long long)bucket_blkno(bucket),
01225596
TM		 5036 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
5037 return -ENOSPC;
5038 }
5039
5040 return 0;
5041}
5042
5043static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
5044 struct ocfs2_xattr_info *xi,
78f30c31
TM		 5045 struct ocfs2_xattr_search *xs,
5046 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 5047{
5048 struct ocfs2_xattr_header *xh;
5049 struct ocfs2_xattr_entry *xe;
5050 u16 count, header_size, xh_free_start;
6dde41d9 5051 int free, max_free, need, old;
01225596
TM		 5052 size_t value_size = 0, name_len = strlen(xi->name);
5053 size_t blocksize = inode->i_sb->s_blocksize;
5054 int ret, allocation = 0;
01225596
TM		 5055
5056 mlog_entry("Set xattr %s in xattr index block\n", xi->name);
5057
5058try_again:
5059 xh = xs->header;
5060 count = le16_to_cpu(xh->xh_count);
5061 xh_free_start = le16_to_cpu(xh->xh_free_start);
5062 header_size = sizeof(struct ocfs2_xattr_header) +
5063 count * sizeof(struct ocfs2_xattr_entry);
5064 max_free = OCFS2_XATTR_BUCKET_SIZE -
5065 le16_to_cpu(xh->xh_name_value_len) - header_size;
5066
5067 mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
5068 "of %u which exceed block size\n",
ba937127 5069 (unsigned long long)bucket_blkno(xs->bucket),
01225596
TM		 5070 header_size);
5071
5072 if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE)
5073 value_size = OCFS2_XATTR_ROOT_SIZE;
5074 else if (xi->value)
5075 value_size = OCFS2_XATTR_SIZE(xi->value_len);
5076
5077 if (xs->not_found)
5078 need = sizeof(struct ocfs2_xattr_entry) +
5079 OCFS2_XATTR_SIZE(name_len) + value_size;
5080 else {
5081 need = value_size + OCFS2_XATTR_SIZE(name_len);
5082
5083 /*
5084 * We only replace the old value if the new length is smaller
5085 * than the old one. Otherwise we will allocate new space in the
5086 * bucket to store it.
5087 */
5088 xe = xs->here;
5089 if (ocfs2_xattr_is_local(xe))
5090 old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
5091 else
5092 old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
5093
5094 if (old >= value_size)
5095 need = 0;
5096 }
5097
5098 free = xh_free_start - header_size;
5099 /*
5100 * We need to make sure the new name/value pair
5101 * can exist in the same block.
5102 */
5103 if (xh_free_start % blocksize < need)
5104 free -= xh_free_start % blocksize;
5105
5106 mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
5107 "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
5108 " %u\n", xs->not_found,
ba937127 5109 (unsigned long long)bucket_blkno(xs->bucket),
01225596
TM		 5110 free, need, max_free, le16_to_cpu(xh->xh_free_start),
5111 le16_to_cpu(xh->xh_name_value_len));
5112
976331d8
TM		 5113 if (free < need ||
5114 (xs->not_found &&
5115 count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
01225596
TM		 5116 if (need <= max_free &&
5117 count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
5118 /*
5119 * We can create the space by defragment. Since only the
5120 * name/value will be moved, the xe shouldn't be changed
5121 * in xs.
5122 */
85db90e7
TM		 5123 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5124 xs->bucket);
01225596
TM		 5125 if (ret) {
5126 mlog_errno(ret);
5127 goto out;
5128 }
5129
5130 xh_free_start = le16_to_cpu(xh->xh_free_start);
5131 free = xh_free_start - header_size;
5132 if (xh_free_start % blocksize < need)
5133 free -= xh_free_start % blocksize;
5134
5135 if (free >= need)
5136 goto xattr_set;
5137
5138 mlog(0, "Can't get enough space for xattr insert by "
5139 "defragment. Need %u bytes, but we have %d, so "
5140 "allocate new bucket for it.\n", need, free);
5141 }
5142
5143 /*
5144 * We have to add new buckets or clusters and one
5145 * allocation should leave us enough space for insert.
5146 */
5147 BUG_ON(allocation);
5148
5149 /*
5150 * We do not allow for overlapping ranges between buckets. And
5151 * the maximum number of collisions we will allow for then is
5152 * one bucket's worth, so check it here whether we need to
5153 * add a new bucket for the insert.
5154 */
80bcaf34 5155 ret = ocfs2_check_xattr_bucket_collision(inode,
ba937127 5156 xs->bucket,
80bcaf34 5157 xi->name);
01225596
TM		 5158 if (ret) {
5159 mlog_errno(ret);
5160 goto out;
5161 }
5162
5163 ret = ocfs2_add_new_xattr_bucket(inode,
5164 xs->xattr_bh,
91f2033f 5165 xs->bucket,
78f30c31 5166 ctxt);
01225596
TM		 5167 if (ret) {
5168 mlog_errno(ret);
5169 goto out;
5170 }
5171
91f2033f
JB		 5172 /*
5173 * ocfs2_add_new_xattr_bucket() will have updated
5174 * xs->bucket if it moved, but it will not have updated
5175 * any of the other search fields. Thus, we drop it and
5176 * re-search. Everything should be cached, so it'll be
5177 * quick.
5178 */
ba937127 5179 ocfs2_xattr_bucket_relse(xs->bucket);
01225596
TM		 5180 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5181 xi->name_index,
5182 xi->name, xs);
5183 if (ret && ret != -ENODATA)
5184 goto out;
5185 xs->not_found = ret;
5186 allocation = 1;
5187 goto try_again;
5188 }
5189
5190xattr_set:
78f30c31 5191 ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
01225596
TM		 5192out:
5193 mlog_exit(ret);
5194 return ret;
5195}
a3944256
TM		 5196
5197static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5198 struct ocfs2_xattr_bucket *bucket,
5199 void *para)
5200{
5201 int ret = 0;
3e632946 5202 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
a3944256
TM		 5203 u16 i;
5204 struct ocfs2_xattr_entry *xe;
78f30c31
TM		 5205 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5206 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
548b0f22
JB		 5207 int credits = ocfs2_remove_extent_credits(osb->sb) +
5208 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
5209
78f30c31
TM		 5210
5211 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
a3944256
TM		 5212
5213 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5214 xe = &xh->xh_entries[i];
5215 if (ocfs2_xattr_is_local(xe))
5216 continue;
5217
88c3b062
TM		 5218 ctxt.handle = ocfs2_start_trans(osb, credits);
5219 if (IS_ERR(ctxt.handle)) {
5220 ret = PTR_ERR(ctxt.handle);
5221 mlog_errno(ret);
5222 break;
5223 }
5224
548b0f22 5225 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
78f30c31 5226 i, 0, &ctxt);
88c3b062
TM		 5227
5228 ocfs2_commit_trans(osb, ctxt.handle);
a3944256
TM		 5229 if (ret) {
5230 mlog_errno(ret);
5231 break;
5232 }
5233 }
5234
78f30c31
TM		 5235 ocfs2_schedule_truncate_log_flush(osb, 1);
5236 ocfs2_run_deallocs(osb, &ctxt.dealloc);
a3944256
TM		 5237 return ret;
5238}
5239
5240static int ocfs2_delete_xattr_index_block(struct inode *inode,
5241 struct buffer_head *xb_bh)
5242{
5243 struct ocfs2_xattr_block *xb =
5244 (struct ocfs2_xattr_block *)xb_bh->b_data;
5245 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
5246 int ret = 0;
5247 u32 name_hash = UINT_MAX, e_cpos, num_clusters;
5248 u64 p_blkno;
5249
5250 if (le16_to_cpu(el->l_next_free_rec) == 0)
5251 return 0;
5252
5253 while (name_hash > 0) {
5254 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
5255 &e_cpos, &num_clusters, el);
5256 if (ret) {
5257 mlog_errno(ret);
5258 goto out;
5259 }
5260
5261 ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters,
5262 ocfs2_delete_xattr_in_bucket,
5263 NULL);
5264 if (ret) {
5265 mlog_errno(ret);
5266 goto out;
5267 }
5268
5269 ret = ocfs2_rm_xattr_cluster(inode, xb_bh,
5270 p_blkno, e_cpos, num_clusters);
5271 if (ret) {
5272 mlog_errno(ret);
5273 break;
5274 }
5275
5276 if (e_cpos == 0)
5277 break;
5278
5279 name_hash = e_cpos - 1;
5280 }
5281
5282out:
5283 return ret;
5284}
99219aea 5285
923f7f31
TY		 5286/*
5287 * 'security' attributes support
5288 */
5289static size_t ocfs2_xattr_security_list(struct inode *inode, char *list,
5290 size_t list_size, const char *name,
5291 size_t name_len)
5292{
5293 const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
5294 const size_t total_len = prefix_len + name_len + 1;
5295
5296 if (list && total_len <= list_size) {
5297 memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
5298 memcpy(list + prefix_len, name, name_len);
5299 list[prefix_len + name_len] = '\0';
5300 }
5301 return total_len;
5302}
5303
5304static int ocfs2_xattr_security_get(struct inode *inode, const char *name,
5305 void *buffer, size_t size)
5306{
5307 if (strcmp(name, "") == 0)
5308 return -EINVAL;
5309 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name,
5310 buffer, size);
5311}
5312
5313static int ocfs2_xattr_security_set(struct inode *inode, const char *name,
5314 const void *value, size_t size, int flags)
5315{
5316 if (strcmp(name, "") == 0)
5317 return -EINVAL;
5318
5319 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value,
5320 size, flags);
5321}
5322
534eaddd
TY		 5323int ocfs2_init_security_get(struct inode *inode,
5324 struct inode *dir,
5325 struct ocfs2_security_xattr_info *si)
5326{
38d59ef6
TY		 5327 /* check whether ocfs2 support feature xattr */
5328 if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb)))
5329 return -EOPNOTSUPP;
534eaddd
TY		 5330 return security_inode_init_security(inode, dir, &si->name, &si->value,
5331 &si->value_len);
5332}
5333
5334int ocfs2_init_security_set(handle_t *handle,
5335 struct inode *inode,
5336 struct buffer_head *di_bh,
5337 struct ocfs2_security_xattr_info *si,
5338 struct ocfs2_alloc_context *xattr_ac,
5339 struct ocfs2_alloc_context *data_ac)
5340{
5341 return ocfs2_xattr_set_handle(handle, inode, di_bh,
5342 OCFS2_XATTR_INDEX_SECURITY,
5343 si->name, si->value, si->value_len, 0,
5344 xattr_ac, data_ac);
5345}
5346
923f7f31
TY		 5347struct xattr_handler ocfs2_xattr_security_handler = {
5348 .prefix = XATTR_SECURITY_PREFIX,
5349 .list = ocfs2_xattr_security_list,
5350 .get = ocfs2_xattr_security_get,
5351 .set = ocfs2_xattr_security_set,
5352};
5353
99219aea
MF		 5354/*
5355 * 'trusted' attributes support
5356 */
99219aea
MF		 5357static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
5358 size_t list_size, const char *name,
5359 size_t name_len)
5360{
ceb1eba3 5361 const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
99219aea
MF		 5362 const size_t total_len = prefix_len + name_len + 1;
5363
5364 if (list && total_len <= list_size) {
5365 memcpy(list, XATTR_TRUSTED_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_trusted_get(struct inode *inode, const char *name,
5373 void *buffer, size_t size)
5374{
5375 if (strcmp(name, "") == 0)
5376 return -EINVAL;
5377 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
5378 buffer, size);
5379}
5380
5381static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
5382 const void *value, size_t size, int flags)
5383{
5384 if (strcmp(name, "") == 0)
5385 return -EINVAL;
5386
5387 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
5388 size, flags);
5389}
5390
5391struct xattr_handler ocfs2_xattr_trusted_handler = {
5392 .prefix = XATTR_TRUSTED_PREFIX,
5393 .list = ocfs2_xattr_trusted_list,
5394 .get = ocfs2_xattr_trusted_get,
5395 .set = ocfs2_xattr_trusted_set,
5396};
5397
99219aea
MF		 5398/*
5399 * 'user' attributes support
5400 */
99219aea
MF		 5401static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
5402 size_t list_size, const char *name,
5403 size_t name_len)
5404{
ceb1eba3 5405 const size_t prefix_len = XATTR_USER_PREFIX_LEN;
99219aea
MF		 5406 const size_t total_len = prefix_len + name_len + 1;
5407 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5408
5409 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5410 return 0;
5411
5412 if (list && total_len <= list_size) {
5413 memcpy(list, XATTR_USER_PREFIX, prefix_len);
5414 memcpy(list + prefix_len, name, name_len);
5415 list[prefix_len + name_len] = '\0';
5416 }
5417 return total_len;
5418}
5419
5420static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
5421 void *buffer, size_t size)
5422{
5423 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5424
5425 if (strcmp(name, "") == 0)
5426 return -EINVAL;
5427 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5428 return -EOPNOTSUPP;
5429 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
5430 buffer, size);
5431}
5432
5433static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
5434 const void *value, size_t size, int flags)
5435{
5436 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5437
5438 if (strcmp(name, "") == 0)
5439 return -EINVAL;
5440 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
5441 return -EOPNOTSUPP;
5442
5443 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
5444 size, flags);
5445}
5446
5447struct xattr_handler ocfs2_xattr_user_handler = {
5448 .prefix = XATTR_USER_PREFIX,
5449 .list = ocfs2_xattr_user_list,
5450 .get = ocfs2_xattr_user_get,
5451 .set = ocfs2_xattr_user_set,
5452};
Linux 6.x block layer and io_uring tree(s)