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