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Merge tag 'cxl-fixes-6.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
[linux-2.6-block.git] / fs / ocfs2 / xattr.c
CommitLineData
1802d0be 1// SPDX-License-Identifier: GPL-2.0-only
fa60ce2c 2/*
f56654c4
TM		 3 * xattr.c
4 *
c3cb6827 5 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
f56654c4 6 *
cf1d6c76 7 * CREDITS:
c3cb6827
TY		 8 * Lots of code in this file is copy from linux/fs/ext3/xattr.c.
9 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
f56654c4
TM		 10 */
11
cf1d6c76
TY		 12#include <linux/capability.h>
13#include <linux/fs.h>
14#include <linux/types.h>
15#include <linux/slab.h>
16#include <linux/highmem.h>
17#include <linux/pagemap.h>
18#include <linux/uio.h>
19#include <linux/sched.h>
20#include <linux/splice.h>
21#include <linux/mount.h>
22#include <linux/writeback.h>
23#include <linux/falloc.h>
01225596 24#include <linux/sort.h>
99219aea
MF		 25#include <linux/init.h>
26#include <linux/module.h>
27#include <linux/string.h>
923f7f31 28#include <linux/security.h>
cf1d6c76 29
f56654c4
TM		 30#include <cluster/masklog.h>
31
32#include "ocfs2.h"
33#include "alloc.h"
d6b32bbb 34#include "blockcheck.h"
f56654c4
TM		 35#include "dlmglue.h"
36#include "file.h"
cf1d6c76
TY		 37#include "symlink.h"
38#include "sysfile.h"
f56654c4
TM		 39#include "inode.h"
40#include "journal.h"
41#include "ocfs2_fs.h"
42#include "suballoc.h"
43#include "uptodate.h"
44#include "buffer_head_io.h"
0c044f0b 45#include "super.h"
cf1d6c76 46#include "xattr.h"
492a8a33 47#include "refcounttree.h"
0fe9b66c 48#include "acl.h"
402b4183 49#include "ocfs2_trace.h"
cf1d6c76
TY		 50
51struct ocfs2_xattr_def_value_root {
52 struct ocfs2_xattr_value_root xv;
53 struct ocfs2_extent_rec er;
54};
55
0c044f0b 56struct ocfs2_xattr_bucket {
ba937127
JB		 57 /* The inode these xattrs are associated with */
58 struct inode *bu_inode;
59
60 /* The actual buffers that make up the bucket */
4ac6032d 61 struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
ba937127
JB		 62
63 /* How many blocks make up one bucket for this filesystem */
64 int bu_blocks;
0c044f0b
TM		 65};
66
78f30c31 67struct ocfs2_xattr_set_ctxt {
85db90e7 68 handle_t *handle;
78f30c31
TM		 69 struct ocfs2_alloc_context *meta_ac;
70 struct ocfs2_alloc_context *data_ac;
71 struct ocfs2_cached_dealloc_ctxt dealloc;
5f5261ac 72 int set_abort;
78f30c31
TM		 73};
74
cf1d6c76
TY		 75#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
76#define OCFS2_XATTR_INLINE_SIZE 80
4442f518 77#define OCFS2_XATTR_HEADER_GAP 4
534eaddd
TY		 78#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
79 - sizeof(struct ocfs2_xattr_header) \
4442f518 80 - OCFS2_XATTR_HEADER_GAP)
89c38bd0
TY		 81#define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
82 - sizeof(struct ocfs2_xattr_block) \
83 - sizeof(struct ocfs2_xattr_header) \
4442f518 84 - OCFS2_XATTR_HEADER_GAP)
cf1d6c76
TY		 85
86static struct ocfs2_xattr_def_value_root def_xv = {
87 .xv.xr_list.l_count = cpu_to_le16(1),
88};
89
2cba9af9 90const struct xattr_handler * const ocfs2_xattr_handlers[] = {
cf1d6c76
TY		 91 &ocfs2_xattr_user_handler,
92 &ocfs2_xattr_trusted_handler,
923f7f31 93 &ocfs2_xattr_security_handler,
cf1d6c76
TY		 94 NULL
95};
96
2cba9af9 97static const struct xattr_handler * const ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
d549b741
CB		 98 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
99 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
100 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
101 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
102 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
cf1d6c76
TY		 103};
104
105struct ocfs2_xattr_info {
6b240ff6
JB		 106 int xi_name_index;
107 const char *xi_name;
18853b95 108 int xi_name_len;
6b240ff6
JB		 109 const void *xi_value;
110 size_t xi_value_len;
cf1d6c76
TY		 111};
112
113struct ocfs2_xattr_search {
114 struct buffer_head *inode_bh;
115 /*
116 * xattr_bh point to the block buffer head which has extended attribute
117 * when extended attribute in inode, xattr_bh is equal to inode_bh.
118 */
119 struct buffer_head *xattr_bh;
120 struct ocfs2_xattr_header *header;
ba937127 121 struct ocfs2_xattr_bucket *bucket;
cf1d6c76
TY		 122 void *base;
123 void *end;
124 struct ocfs2_xattr_entry *here;
125 int not_found;
126};
127
11179f2c
JB		 128/* Operations on struct ocfs2_xa_entry */
129struct ocfs2_xa_loc;
130struct ocfs2_xa_loc_operations {
cf2bc809
JB		 131 /*
132 * Journal functions
133 */
134 int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc,
135 int type);
136 void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc);
137
11179f2c
JB		 138 /*
139 * Return a pointer to the appropriate buffer in loc->xl_storage
140 * at the given offset from loc->xl_header.
141 */
142 void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset);
143
69a3e539
JB		 144 /* Can we reuse the existing entry for the new value? */
145 int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc,
146 struct ocfs2_xattr_info *xi);
147
148 /* How much space is needed for the new value? */
149 int (*xlo_check_space)(struct ocfs2_xa_loc *loc,
150 struct ocfs2_xattr_info *xi);
151
152 /*
153 * Return the offset of the first name+value pair. This is
154 * the start of our downward-filling free space.
155 */
156 int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc);
157
11179f2c
JB		 158 /*
159 * Remove the name+value at this location. Do whatever is
160 * appropriate with the remaining name+value pairs.
161 */
162 void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc);
69a3e539
JB		 163
164 /* Fill xl_entry with a new entry */
165 void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash);
166
167 /* Add name+value storage to an entry */
168 void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size);
3fc12afa
JB		 169
170 /*
171 * Initialize the value buf's access and bh fields for this entry.
172 * ocfs2_xa_fill_value_buf() will handle the xv pointer.
173 */
174 void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc,
175 struct ocfs2_xattr_value_buf *vb);
11179f2c
JB		 176};
177
178/*
179 * Describes an xattr entry location. This is a memory structure
180 * tracking the on-disk structure.
181 */
182struct ocfs2_xa_loc {
cf2bc809
JB		 183 /* This xattr belongs to this inode */
184 struct inode *xl_inode;
185
11179f2c
JB		 186 /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */
187 struct ocfs2_xattr_header *xl_header;
188
189 /* Bytes from xl_header to the end of the storage */
190 int xl_size;
191
192 /*
193 * The ocfs2_xattr_entry this location describes. If this is
194 * NULL, this location describes the on-disk structure where it
195 * would have been.
196 */
197 struct ocfs2_xattr_entry *xl_entry;
198
199 /*
200 * Internal housekeeping
201 */
202
203 /* Buffer(s) containing this entry */
204 void *xl_storage;
205
206 /* Operations on the storage backing this location */
207 const struct ocfs2_xa_loc_operations *xl_ops;
208};
209
199799a3
JB		 210/*
211 * Convenience functions to calculate how much space is needed for a
212 * given name+value pair
213 */
214static int namevalue_size(int name_len, uint64_t value_len)
215{
216 if (value_len > OCFS2_XATTR_INLINE_SIZE)
217 return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
218 else
219 return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
220}
221
222static int namevalue_size_xi(struct ocfs2_xattr_info *xi)
223{
224 return namevalue_size(xi->xi_name_len, xi->xi_value_len);
225}
226
227static int namevalue_size_xe(struct ocfs2_xattr_entry *xe)
228{
229 u64 value_len = le64_to_cpu(xe->xe_value_size);
230
231 BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) &&
232 ocfs2_xattr_is_local(xe));
233 return namevalue_size(xe->xe_name_len, value_len);
234}
235
236
fd68a894 237static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
589dc260
TM		 238 struct ocfs2_xattr_header *xh,
239 int index,
240 int *block_off,
241 int *new_offset);
242
54f443f4
JB		 243static int ocfs2_xattr_block_find(struct inode *inode,
244 int name_index,
245 const char *name,
246 struct ocfs2_xattr_search *xs);
589dc260
TM		 247static int ocfs2_xattr_index_block_find(struct inode *inode,
248 struct buffer_head *root_bh,
249 int name_index,
250 const char *name,
251 struct ocfs2_xattr_search *xs);
252
0c044f0b 253static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
47bca495 254 struct buffer_head *blk_bh,
0c044f0b
TM		 255 char *buffer,
256 size_t buffer_size);
257
01225596 258static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 259 struct ocfs2_xattr_search *xs,
260 struct ocfs2_xattr_set_ctxt *ctxt);
01225596
TM		 261
262static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
263 struct ocfs2_xattr_info *xi,
78f30c31
TM		 264 struct ocfs2_xattr_search *xs,
265 struct ocfs2_xattr_set_ctxt *ctxt);
01225596 266
47bca495
TM		 267typedef int (xattr_tree_rec_func)(struct inode *inode,
268 struct buffer_head *root_bh,
269 u64 blkno, u32 cpos, u32 len, void *para);
270static int ocfs2_iterate_xattr_index_block(struct inode *inode,
271 struct buffer_head *root_bh,
272 xattr_tree_rec_func *rec_func,
273 void *para);
274static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
275 struct ocfs2_xattr_bucket *bucket,
276 void *para);
277static int ocfs2_rm_xattr_cluster(struct inode *inode,
278 struct buffer_head *root_bh,
279 u64 blkno,
280 u32 cpos,
281 u32 len,
282 void *para);
283
c58b6032
JB		 284static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
285 u64 src_blk, u64 last_blk, u64 to_blk,
286 unsigned int start_bucket,
287 u32 *first_hash);
492a8a33
TM		 288static int ocfs2_prepare_refcount_xattr(struct inode *inode,
289 struct ocfs2_dinode *di,
290 struct ocfs2_xattr_info *xi,
291 struct ocfs2_xattr_search *xis,
292 struct ocfs2_xattr_search *xbs,
293 struct ocfs2_refcount_tree **ref_tree,
294 int *meta_need,
295 int *credits);
ce9c5a54
TM		 296static int ocfs2_get_xattr_tree_value_root(struct super_block *sb,
297 struct ocfs2_xattr_bucket *bucket,
298 int offset,
299 struct ocfs2_xattr_value_root **xv,
300 struct buffer_head **bh);
a3944256 301
0030e001
TY		 302static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
303{
304 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
305}
306
307static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
308{
309 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
310}
311
9c7759aa 312#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
51def39f 313#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
3e632946 314#define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
9c7759aa 315
ba937127 316static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
6dde41d9 317{
ba937127
JB		 318 struct ocfs2_xattr_bucket *bucket;
319 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
6dde41d9 320
ba937127
JB		 321 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
322
323 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
324 if (bucket) {
325 bucket->bu_inode = inode;
326 bucket->bu_blocks = blks;
327 }
328
329 return bucket;
330}
331
332static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
333{
334 int i;
335
336 for (i = 0; i < bucket->bu_blocks; i++) {
6dde41d9
JB		 337 brelse(bucket->bu_bhs[i]);
338 bucket->bu_bhs[i] = NULL;
339 }
340}
341
ba937127
JB		 342static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
343{
344 if (bucket) {
345 ocfs2_xattr_bucket_relse(bucket);
346 bucket->bu_inode = NULL;
347 kfree(bucket);
348 }
349}
350
784b816a
JB		 351/*
352 * A bucket that has never been written to disk doesn't need to be
353 * read. We just need the buffer_heads. Don't call this for
354 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
355 * them fully.
356 */
ba937127 357static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
9c339255 358 u64 xb_blkno, int new)
784b816a
JB		 359{
360 int i, rc = 0;
784b816a 361
ba937127
JB		 362 for (i = 0; i < bucket->bu_blocks; i++) {
363 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
364 xb_blkno + i);
784b816a 365 if (!bucket->bu_bhs[i]) {
7391a294 366 rc = -ENOMEM;
784b816a
JB		 367 mlog_errno(rc);
368 break;
369 }
370
8cb471e8 371 if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
9c339255
WW		 372 bucket->bu_bhs[i])) {
373 if (new)
374 ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
375 bucket->bu_bhs[i]);
376 else {
377 set_buffer_uptodate(bucket->bu_bhs[i]);
378 ocfs2_set_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
379 bucket->bu_bhs[i]);
380 }
381 }
784b816a
JB		 382 }
383
384 if (rc)
ba937127 385 ocfs2_xattr_bucket_relse(bucket);
784b816a
JB		 386 return rc;
387}
388
389/* Read the xattr bucket at xb_blkno */
ba937127 390static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
784b816a
JB		 391 u64 xb_blkno)
392{
ba937127 393 int rc;
784b816a 394
8cb471e8 395 rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno,
970e4936
JB		 396 bucket->bu_blocks, bucket->bu_bhs, 0,
397 NULL);
4d0e214e 398 if (!rc) {
c8b9cf9a 399 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e
JB		 400 rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb,
401 bucket->bu_bhs,
402 bucket->bu_blocks,
403 &bucket_xh(bucket)->xh_check);
c8b9cf9a 404 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e
JB		 405 if (rc)
406 mlog_errno(rc);
407 }
408
784b816a 409 if (rc)
ba937127 410 ocfs2_xattr_bucket_relse(bucket);
784b816a
JB		 411 return rc;
412}
413
1224be02 414static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
1224be02
JB		 415 struct ocfs2_xattr_bucket *bucket,
416 int type)
417{
418 int i, rc = 0;
1224be02 419
ba937127 420 for (i = 0; i < bucket->bu_blocks; i++) {
0cf2f763
JB		 421 rc = ocfs2_journal_access(handle,
422 INODE_CACHE(bucket->bu_inode),
1224be02
JB		 423 bucket->bu_bhs[i], type);
424 if (rc) {
425 mlog_errno(rc);
426 break;
427 }
428 }
429
430 return rc;
431}
432
433static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
1224be02
JB		 434 struct ocfs2_xattr_bucket *bucket)
435{
ba937127 436 int i;
1224be02 437
c8b9cf9a 438 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e
JB		 439 ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb,
440 bucket->bu_bhs, bucket->bu_blocks,
441 &bucket_xh(bucket)->xh_check);
c8b9cf9a 442 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e 443
ba937127 444 for (i = 0; i < bucket->bu_blocks; i++)
1224be02
JB		 445 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
446}
447
ba937127 448static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
4980c6da
JB		 449 struct ocfs2_xattr_bucket *src)
450{
451 int i;
ba937127
JB		 452 int blocksize = src->bu_inode->i_sb->s_blocksize;
453
454 BUG_ON(dest->bu_blocks != src->bu_blocks);
455 BUG_ON(dest->bu_inode != src->bu_inode);
4980c6da 456
ba937127 457 for (i = 0; i < src->bu_blocks; i++) {
4980c6da
JB		 458 memcpy(bucket_block(dest, i), bucket_block(src, i),
459 blocksize);
460 }
461}
1224be02 462
4ae1d69b
JB		 463static int ocfs2_validate_xattr_block(struct super_block *sb,
464 struct buffer_head *bh)
465{
d6b32bbb 466 int rc;
4ae1d69b
JB		 467 struct ocfs2_xattr_block *xb =
468 (struct ocfs2_xattr_block *)bh->b_data;
469
402b4183 470 trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr);
4ae1d69b 471
d6b32bbb
JB		 472 BUG_ON(!buffer_uptodate(bh));
473
474 /*
475 * If the ecc fails, we return the error but otherwise
476 * leave the filesystem running. We know any error is
477 * local to this block.
478 */
479 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check);
480 if (rc)
481 return rc;
482
483 /*
484 * Errors after here are fatal
485 */
486
4ae1d69b 487 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
17a5b9ab 488 return ocfs2_error(sb,
7ecef14a
JP		 489 "Extended attribute block #%llu has bad signature %.*s\n",
490 (unsigned long long)bh->b_blocknr, 7,
491 xb->xb_signature);
4ae1d69b
JB		 492 }
493
494 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
17a5b9ab 495 return ocfs2_error(sb,
7ecef14a
JP		 496 "Extended attribute block #%llu has an invalid xb_blkno of %llu\n",
497 (unsigned long long)bh->b_blocknr,
498 (unsigned long long)le64_to_cpu(xb->xb_blkno));
4ae1d69b
JB		 499 }
500
501 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
17a5b9ab 502 return ocfs2_error(sb,
7ecef14a
JP		 503 "Extended attribute block #%llu has an invalid xb_fs_generation of #%u\n",
504 (unsigned long long)bh->b_blocknr,
505 le32_to_cpu(xb->xb_fs_generation));
4ae1d69b
JB		 506 }
507
508 return 0;
509}
510
511static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
512 struct buffer_head **bh)
513{
514 int rc;
515 struct buffer_head *tmp = *bh;
516
8cb471e8 517 rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp,
970e4936 518 ocfs2_validate_xattr_block);
4ae1d69b
JB		 519
520 /* If ocfs2_read_block() got us a new bh, pass it up. */
521 if (!rc && !*bh)
522 *bh = tmp;
523
524 return rc;
525}
526
936b8834 527static inline const char *ocfs2_xattr_prefix(int name_index)
cf1d6c76 528{
537d81ca 529 const struct xattr_handler *handler = NULL;
cf1d6c76
TY		 530
531 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
532 handler = ocfs2_xattr_handler_map[name_index];
98e9cb57 533 return handler ? xattr_prefix(handler) : NULL;
cf1d6c76
TY		 534}
535
40daa16a 536static u32 ocfs2_xattr_name_hash(struct inode *inode,
2057e5c6 537 const char *name,
40daa16a 538 int name_len)
cf1d6c76
TY		 539{
540 /* Get hash value of uuid from super block */
541 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
542 int i;
543
cf1d6c76
TY		 544 /* hash extended attribute name */
545 for (i = 0; i < name_len; i++) {
546 hash = (hash << OCFS2_HASH_SHIFT) ^
547 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
548 *name++;
549 }
550
551 return hash;
552}
553
534eaddd
TY		 554static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
555{
199799a3
JB		 556 return namevalue_size(name_len, value_len) +
557 sizeof(struct ocfs2_xattr_entry);
558}
534eaddd 559
199799a3
JB		 560static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi)
561{
562 return namevalue_size_xi(xi) +
563 sizeof(struct ocfs2_xattr_entry);
564}
534eaddd 565
199799a3
JB		 566static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe)
567{
568 return namevalue_size_xe(xe) +
569 sizeof(struct ocfs2_xattr_entry);
534eaddd
TY		 570}
571
572int ocfs2_calc_security_init(struct inode *dir,
573 struct ocfs2_security_xattr_info *si,
574 int *want_clusters,
575 int *xattr_credits,
576 struct ocfs2_alloc_context **xattr_ac)
577{
578 int ret = 0;
579 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
580 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
581 si->value_len);
582
583 /*
584 * The max space of security xattr taken inline is
585 * 256(name) + 80(value) + 16(entry) = 352 bytes,
586 * So reserve one metadata block for it is ok.
587 */
588 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
589 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
590 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
591 if (ret) {
592 mlog_errno(ret);
593 return ret;
594 }
595 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
596 }
597
598 /* reserve clusters for xattr value which will be set in B tree*/
0e445b6f
TY		 599 if (si->value_len > OCFS2_XATTR_INLINE_SIZE) {
600 int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
601 si->value_len);
602
603 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
604 new_clusters);
605 *want_clusters += new_clusters;
606 }
534eaddd
TY		 607 return ret;
608}
609
89c38bd0
TY		 610int ocfs2_calc_xattr_init(struct inode *dir,
611 struct buffer_head *dir_bh,
67697cbd 612 umode_t mode,
89c38bd0
TY		 613 struct ocfs2_security_xattr_info *si,
614 int *want_clusters,
615 int *xattr_credits,
9b7895ef 616 int *want_meta)
89c38bd0
TY		 617{
618 int ret = 0;
619 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
0e445b6f 620 int s_size = 0, a_size = 0, acl_len = 0, new_clusters;
89c38bd0
TY		 621
622 if (si->enable)
623 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
624 si->value_len);
625
626 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
16c8d569 627 down_read(&OCFS2_I(dir)->ip_xattr_sem);
89c38bd0
TY		 628 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
629 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
630 "", NULL, 0);
16c8d569 631 up_read(&OCFS2_I(dir)->ip_xattr_sem);
89c38bd0
TY		 632 if (acl_len > 0) {
633 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
634 if (S_ISDIR(mode))
635 a_size <<= 1;
636 } else if (acl_len != 0 && acl_len != -ENODATA) {
c0a1a6d7 637 ret = acl_len;
89c38bd0
TY		 638 mlog_errno(ret);
639 return ret;
640 }
641 }
642
643 if (!(s_size + a_size))
644 return ret;
645
646 /*
647 * The max space of security xattr taken inline is
648 * 256(name) + 80(value) + 16(entry) = 352 bytes,
649 * The max space of acl xattr taken inline is
650 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
651 * when blocksize = 512, may reserve one more cluser for
652 * xattr bucket, otherwise reserve one metadata block
653 * for them is ok.
6c9fd1dc
TY		 654 * If this is a new directory with inline data,
655 * we choose to reserve the entire inline area for
656 * directory contents and force an external xattr block.
89c38bd0
TY		 657 */
658 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
6c9fd1dc 659 (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) ||
89c38bd0 660 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
9b7895ef 661 *want_meta = *want_meta + 1;
89c38bd0
TY		 662 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
663 }
664
665 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
666 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
667 *want_clusters += 1;
668 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
669 }
670
0e445b6f
TY		 671 /*
672 * reserve credits and clusters for xattrs which has large value
673 * and have to be set outside
674 */
675 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) {
676 new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
677 si->value_len);
678 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
679 new_clusters);
680 *want_clusters += new_clusters;
681 }
89c38bd0
TY		 682 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
683 acl_len > OCFS2_XATTR_INLINE_SIZE) {
0e445b6f
TY		 684 /* for directory, it has DEFAULT and ACCESS two types of acls */
685 new_clusters = (S_ISDIR(mode) ? 2 : 1) *
686 ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
687 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
688 new_clusters);
689 *want_clusters += new_clusters;
89c38bd0
TY		 690 }
691
692 return ret;
693}
694
f56654c4
TM		 695static int ocfs2_xattr_extend_allocation(struct inode *inode,
696 u32 clusters_to_add,
19b801f4 697 struct ocfs2_xattr_value_buf *vb,
78f30c31 698 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4 699{
a78f9f46 700 int status = 0, credits;
85db90e7 701 handle_t *handle = ctxt->handle;
f56654c4 702 enum ocfs2_alloc_restarted why;
19b801f4 703 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
f99b9b7c 704 struct ocfs2_extent_tree et;
f56654c4 705
5e404e9e 706 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
f99b9b7c 707
a78f9f46 708 while (clusters_to_add) {
402b4183
TM		 709 trace_ocfs2_xattr_extend_allocation(clusters_to_add);
710
a78f9f46
TM		 711 status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
712 OCFS2_JOURNAL_ACCESS_WRITE);
713 if (status < 0) {
714 mlog_errno(status);
715 break;
716 }
f56654c4 717
a78f9f46
TM		 718 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
719 status = ocfs2_add_clusters_in_btree(handle,
720 &et,
721 &logical_start,
722 clusters_to_add,
723 0,
724 ctxt->data_ac,
725 ctxt->meta_ac,
726 &why);
727 if ((status < 0) && (status != -EAGAIN)) {
728 if (status != -ENOSPC)
729 mlog_errno(status);
730 break;
731 }
f56654c4 732
a78f9f46
TM		 733 ocfs2_journal_dirty(handle, vb->vb_bh);
734
735 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) -
736 prev_clusters;
737
738 if (why != RESTART_NONE && clusters_to_add) {
739 /*
740 * We can only fail in case the alloc file doesn't give
741 * up enough clusters.
742 */
743 BUG_ON(why == RESTART_META);
744
a78f9f46 745 credits = ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 746 &vb->vb_xv->xr_list);
a78f9f46
TM		 747 status = ocfs2_extend_trans(handle, credits);
748 if (status < 0) {
749 status = -ENOMEM;
750 mlog_errno(status);
751 break;
752 }
753 }
754 }
f56654c4
TM		 755
756 return status;
757}
758
759static int __ocfs2_remove_xattr_range(struct inode *inode,
d72cc72d 760 struct ocfs2_xattr_value_buf *vb,
f56654c4 761 u32 cpos, u32 phys_cpos, u32 len,
492a8a33 762 unsigned int ext_flags,
78f30c31 763 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 764{
765 int ret;
766 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
85db90e7 767 handle_t *handle = ctxt->handle;
f99b9b7c
JB		 768 struct ocfs2_extent_tree et;
769
5e404e9e 770 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
f56654c4 771
0cf2f763 772 ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
d72cc72d 773 OCFS2_JOURNAL_ACCESS_WRITE);
f56654c4
TM		 774 if (ret) {
775 mlog_errno(ret);
85db90e7 776 goto out;
f56654c4
TM		 777 }
778
dbdcf6a4 779 ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac,
78f30c31 780 &ctxt->dealloc);
f56654c4
TM		 781 if (ret) {
782 mlog_errno(ret);
85db90e7 783 goto out;
f56654c4
TM		 784 }
785
d72cc72d 786 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
ec20cec7 787 ocfs2_journal_dirty(handle, vb->vb_bh);
f56654c4 788
492a8a33
TM		 789 if (ext_flags & OCFS2_EXT_REFCOUNTED)
790 ret = ocfs2_decrease_refcount(inode, handle,
791 ocfs2_blocks_to_clusters(inode->i_sb,
792 phys_blkno),
793 len, ctxt->meta_ac, &ctxt->dealloc, 1);
794 else
795 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc,
796 phys_blkno, len);
f56654c4
TM		 797 if (ret)
798 mlog_errno(ret);
799
f56654c4 800out:
f56654c4
TM		 801 return ret;
802}
803
804static int ocfs2_xattr_shrink_size(struct inode *inode,
805 u32 old_clusters,
806 u32 new_clusters,
19b801f4 807 struct ocfs2_xattr_value_buf *vb,
78f30c31 808 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 809{
810 int ret = 0;
492a8a33 811 unsigned int ext_flags;
f56654c4
TM		 812 u32 trunc_len, cpos, phys_cpos, alloc_size;
813 u64 block;
f56654c4
TM		 814
815 if (old_clusters <= new_clusters)
816 return 0;
817
818 cpos = new_clusters;
819 trunc_len = old_clusters - new_clusters;
820 while (trunc_len) {
821 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
d72cc72d 822 &alloc_size,
492a8a33 823 &vb->vb_xv->xr_list, &ext_flags);
f56654c4
TM		 824 if (ret) {
825 mlog_errno(ret);
826 goto out;
827 }
828
829 if (alloc_size > trunc_len)
830 alloc_size = trunc_len;
831
19b801f4 832 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
f56654c4 833 phys_cpos, alloc_size,
492a8a33 834 ext_flags, ctxt);
f56654c4
TM		 835 if (ret) {
836 mlog_errno(ret);
837 goto out;
838 }
839
840 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
8cb471e8
JB		 841 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode),
842 block, alloc_size);
f56654c4
TM		 843 cpos += alloc_size;
844 trunc_len -= alloc_size;
845 }
846
847out:
f56654c4
TM		 848 return ret;
849}
850
851static int ocfs2_xattr_value_truncate(struct inode *inode,
b3e5d379 852 struct ocfs2_xattr_value_buf *vb,
78f30c31
TM		 853 int len,
854 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 855{
856 int ret;
857 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
b3e5d379 858 u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
f56654c4
TM		 859
860 if (new_clusters == old_clusters)
861 return 0;
862
863 if (new_clusters > old_clusters)
864 ret = ocfs2_xattr_extend_allocation(inode,
865 new_clusters - old_clusters,
b3e5d379 866 vb, ctxt);
f56654c4
TM		 867 else
868 ret = ocfs2_xattr_shrink_size(inode,
869 old_clusters, new_clusters,
b3e5d379 870 vb, ctxt);
f56654c4
TM		 871
872 return ret;
873}
cf1d6c76 874
1046cb11
AG		 875static int ocfs2_xattr_list_entry(struct super_block *sb,
876 char *buffer, size_t size,
877 size_t *result, int type,
936b8834
TM		 878 const char *name, int name_len)
879{
880 char *p = buffer + *result;
1046cb11
AG		 881 const char *prefix;
882 int prefix_len;
883 int total_len;
936b8834 884
1046cb11
AG		 885 switch(type) {
886 case OCFS2_XATTR_INDEX_USER:
887 if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
888 return 0;
889 break;
890
891 case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
892 case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
1751e8a6 893 if (!(sb->s_flags & SB_POSIXACL))
1046cb11
AG		 894 return 0;
895 break;
896
897 case OCFS2_XATTR_INDEX_TRUSTED:
898 if (!capable(CAP_SYS_ADMIN))
899 return 0;
900 break;
901 }
902
903 prefix = ocfs2_xattr_prefix(type);
904 if (!prefix)
905 return 0;
906 prefix_len = strlen(prefix);
907 total_len = prefix_len + name_len + 1;
936b8834
TM		 908 *result += total_len;
909
910 /* we are just looking for how big our buffer needs to be */
911 if (!size)
912 return 0;
913
914 if (*result > size)
915 return -ERANGE;
916
917 memcpy(p, prefix, prefix_len);
918 memcpy(p + prefix_len, name, name_len);
919 p[prefix_len + name_len] = '\0';
920
921 return 0;
922}
923
cf1d6c76
TY		 924static int ocfs2_xattr_list_entries(struct inode *inode,
925 struct ocfs2_xattr_header *header,
926 char *buffer, size_t buffer_size)
927{
936b8834
TM		 928 size_t result = 0;
929 int i, type, ret;
1046cb11 930 const char *name;
cf1d6c76
TY		 931
932 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
933 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
936b8834 934 type = ocfs2_xattr_get_type(entry);
1046cb11
AG		 935 name = (const char *)header +
936 le16_to_cpu(entry->xe_name_offset);
936b8834 937
1046cb11
AG		 938 ret = ocfs2_xattr_list_entry(inode->i_sb,
939 buffer, buffer_size,
940 &result, type, name,
941 entry->xe_name_len);
942 if (ret)
943 return ret;
cf1d6c76
TY		 944 }
945
936b8834 946 return result;
cf1d6c76
TY		 947}
948
8b2c0dba
TM		 949int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
950 struct ocfs2_dinode *di)
951{
952 struct ocfs2_xattr_header *xh;
953 int i;
954
955 xh = (struct ocfs2_xattr_header *)
956 ((void *)di + inode->i_sb->s_blocksize -
957 le16_to_cpu(di->i_xattr_inline_size));
958
959 for (i = 0; i < le16_to_cpu(xh->xh_count); i++)
960 if (!ocfs2_xattr_is_local(&xh->xh_entries[i]))
961 return 1;
962
963 return 0;
964}
965
cf1d6c76
TY		 966static int ocfs2_xattr_ibody_list(struct inode *inode,
967 struct ocfs2_dinode *di,
968 char *buffer,
969 size_t buffer_size)
970{
971 struct ocfs2_xattr_header *header = NULL;
972 struct ocfs2_inode_info *oi = OCFS2_I(inode);
973 int ret = 0;
974
975 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
976 return ret;
977
978 header = (struct ocfs2_xattr_header *)
979 ((void *)di + inode->i_sb->s_blocksize -
980 le16_to_cpu(di->i_xattr_inline_size));
981
982 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
983
984 return ret;
985}
986
987static int ocfs2_xattr_block_list(struct inode *inode,
988 struct ocfs2_dinode *di,
989 char *buffer,
990 size_t buffer_size)
991{
992 struct buffer_head *blk_bh = NULL;
0c044f0b 993 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 994 int ret = 0;
995
996 if (!di->i_xattr_loc)
997 return ret;
998
4ae1d69b
JB		 999 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
1000 &blk_bh);
cf1d6c76
TY		 1001 if (ret < 0) {
1002 mlog_errno(ret);
1003 return ret;
1004 }
cf1d6c76 1005
0c044f0b 1006 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
0c044f0b
TM		 1007 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1008 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
1009 ret = ocfs2_xattr_list_entries(inode, header,
1010 buffer, buffer_size);
47bca495
TM		 1011 } else
1012 ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh,
0c044f0b 1013 buffer, buffer_size);
4ae1d69b 1014
cf1d6c76
TY		 1015 brelse(blk_bh);
1016
1017 return ret;
1018}
1019
1020ssize_t ocfs2_listxattr(struct dentry *dentry,
1021 char *buffer,
1022 size_t size)
1023{
1024 int ret = 0, i_ret = 0, b_ret = 0;
1025 struct buffer_head *di_bh = NULL;
1026 struct ocfs2_dinode *di = NULL;
2b0143b5 1027 struct ocfs2_inode_info *oi = OCFS2_I(d_inode(dentry));
cf1d6c76 1028
8154da3d
TY		 1029 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
1030 return -EOPNOTSUPP;
1031
cf1d6c76
TY		 1032 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1033 return ret;
1034
2b0143b5 1035 ret = ocfs2_inode_lock(d_inode(dentry), &di_bh, 0);
cf1d6c76
TY		 1036 if (ret < 0) {
1037 mlog_errno(ret);
1038 return ret;
1039 }
1040
1041 di = (struct ocfs2_dinode *)di_bh->b_data;
1042
1043 down_read(&oi->ip_xattr_sem);
2b0143b5 1044 i_ret = ocfs2_xattr_ibody_list(d_inode(dentry), di, buffer, size);
cf1d6c76
TY		 1045 if (i_ret < 0)
1046 b_ret = 0;
1047 else {
1048 if (buffer) {
1049 buffer += i_ret;
1050 size -= i_ret;
1051 }
2b0143b5 1052 b_ret = ocfs2_xattr_block_list(d_inode(dentry), di,
cf1d6c76
TY		 1053 buffer, size);
1054 if (b_ret < 0)
1055 i_ret = 0;
1056 }
1057 up_read(&oi->ip_xattr_sem);
2b0143b5 1058 ocfs2_inode_unlock(d_inode(dentry), 0);
cf1d6c76
TY		 1059
1060 brelse(di_bh);
1061
1062 return i_ret + b_ret;
1063}
1064
1065static int ocfs2_xattr_find_entry(int name_index,
1066 const char *name,
1067 struct ocfs2_xattr_search *xs)
1068{
1069 struct ocfs2_xattr_entry *entry;
1070 size_t name_len;
1071 int i, cmp = 1;
1072
1073 if (name == NULL)
1074 return -EINVAL;
1075
1076 name_len = strlen(name);
1077 entry = xs->here;
1078 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
1079 cmp = name_index - ocfs2_xattr_get_type(entry);
1080 if (!cmp)
1081 cmp = name_len - entry->xe_name_len;
1082 if (!cmp)
1083 cmp = memcmp(name, (xs->base +
1084 le16_to_cpu(entry->xe_name_offset)),
1085 name_len);
1086 if (cmp == 0)
1087 break;
1088 entry += 1;
1089 }
1090 xs->here = entry;
1091
1092 return cmp ? -ENODATA : 0;
1093}
1094
1095static int ocfs2_xattr_get_value_outside(struct inode *inode,
589dc260 1096 struct ocfs2_xattr_value_root *xv,
cf1d6c76
TY		 1097 void *buffer,
1098 size_t len)
1099{
1100 u32 cpos, p_cluster, num_clusters, bpc, clusters;
1101 u64 blkno;
1102 int i, ret = 0;
1103 size_t cplen, blocksize;
1104 struct buffer_head *bh = NULL;
cf1d6c76
TY		 1105 struct ocfs2_extent_list *el;
1106
cf1d6c76
TY		 1107 el = &xv->xr_list;
1108 clusters = le32_to_cpu(xv->xr_clusters);
1109 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1110 blocksize = inode->i_sb->s_blocksize;
1111
1112 cpos = 0;
1113 while (cpos < clusters) {
1114 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1061f9c1 1115 &num_clusters, el, NULL);
cf1d6c76
TY		 1116 if (ret) {
1117 mlog_errno(ret);
1118 goto out;
1119 }
1120
1121 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1122 /* Copy ocfs2_xattr_value */
1123 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
8cb471e8
JB		 1124 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1125 &bh, NULL);
cf1d6c76
TY		 1126 if (ret) {
1127 mlog_errno(ret);
1128 goto out;
1129 }
1130
1131 cplen = len >= blocksize ? blocksize : len;
1132 memcpy(buffer, bh->b_data, cplen);
1133 len -= cplen;
1134 buffer += cplen;
1135
1136 brelse(bh);
1137 bh = NULL;
1138 if (len == 0)
1139 break;
1140 }
1141 cpos += num_clusters;
1142 }
1143out:
1144 return ret;
1145}
1146
1147static int ocfs2_xattr_ibody_get(struct inode *inode,
1148 int name_index,
1149 const char *name,
1150 void *buffer,
1151 size_t buffer_size,
1152 struct ocfs2_xattr_search *xs)
1153{
1154 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1155 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
589dc260 1156 struct ocfs2_xattr_value_root *xv;
cf1d6c76
TY		 1157 size_t size;
1158 int ret = 0;
1159
1160 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
1161 return -ENODATA;
1162
1163 xs->end = (void *)di + inode->i_sb->s_blocksize;
1164 xs->header = (struct ocfs2_xattr_header *)
1165 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1166 xs->base = (void *)xs->header;
1167 xs->here = xs->header->xh_entries;
1168
1169 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1170 if (ret)
1171 return ret;
1172 size = le64_to_cpu(xs->here->xe_value_size);
1173 if (buffer) {
1174 if (size > buffer_size)
1175 return -ERANGE;
1176 if (ocfs2_xattr_is_local(xs->here)) {
1177 memcpy(buffer, (void *)xs->base +
1178 le16_to_cpu(xs->here->xe_name_offset) +
1179 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1180 } else {
589dc260
TM		 1181 xv = (struct ocfs2_xattr_value_root *)
1182 (xs->base + le16_to_cpu(
1183 xs->here->xe_name_offset) +
1184 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1185 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1186 buffer, size);
1187 if (ret < 0) {
1188 mlog_errno(ret);
1189 return ret;
1190 }
1191 }
1192 }
1193
1194 return size;
1195}
1196
1197static int ocfs2_xattr_block_get(struct inode *inode,
1198 int name_index,
1199 const char *name,
1200 void *buffer,
1201 size_t buffer_size,
1202 struct ocfs2_xattr_search *xs)
1203{
cf1d6c76 1204 struct ocfs2_xattr_block *xb;
589dc260 1205 struct ocfs2_xattr_value_root *xv;
cf1d6c76 1206 size_t size;
44d8e4e1 1207 int ret = -ENODATA, name_offset, name_len, i;
3f649ab7 1208 int block_off;
cf1d6c76 1209
ba937127
JB		 1210 xs->bucket = ocfs2_xattr_bucket_new(inode);
1211 if (!xs->bucket) {
1212 ret = -ENOMEM;
1213 mlog_errno(ret);
1214 goto cleanup;
1215 }
589dc260 1216
54f443f4
JB		 1217 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1218 if (ret) {
cf1d6c76 1219 mlog_errno(ret);
cf1d6c76
TY		 1220 goto cleanup;
1221 }
1222
6c1e183e
TY		 1223 if (xs->not_found) {
1224 ret = -ENODATA;
1225 goto cleanup;
1226 }
1227
54f443f4 1228 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 1229 size = le64_to_cpu(xs->here->xe_value_size);
1230 if (buffer) {
1231 ret = -ERANGE;
1232 if (size > buffer_size)
1233 goto cleanup;
589dc260
TM		 1234
1235 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1236 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1237 i = xs->here - xs->header->xh_entries;
1238
1239 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
fd68a894 1240 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
ba937127 1241 bucket_xh(xs->bucket),
589dc260
TM		 1242 i,
1243 &block_off,
1244 &name_offset);
023d4ea3
JQ		 1245 if (ret) {
1246 mlog_errno(ret);
1247 goto cleanup;
1248 }
ba937127 1249 xs->base = bucket_block(xs->bucket, block_off);
589dc260 1250 }
cf1d6c76
TY		 1251 if (ocfs2_xattr_is_local(xs->here)) {
1252 memcpy(buffer, (void *)xs->base +
589dc260 1253 name_offset + name_len, size);
cf1d6c76 1254 } else {
589dc260
TM		 1255 xv = (struct ocfs2_xattr_value_root *)
1256 (xs->base + name_offset + name_len);
1257 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1258 buffer, size);
1259 if (ret < 0) {
1260 mlog_errno(ret);
1261 goto cleanup;
1262 }
1263 }
1264 }
1265 ret = size;
1266cleanup:
ba937127 1267 ocfs2_xattr_bucket_free(xs->bucket);
cf1d6c76 1268
54f443f4
JB		 1269 brelse(xs->xattr_bh);
1270 xs->xattr_bh = NULL;
cf1d6c76
TY		 1271 return ret;
1272}
1273
4e3e9d02
TY		 1274int ocfs2_xattr_get_nolock(struct inode *inode,
1275 struct buffer_head *di_bh,
0030e001
TY		 1276 int name_index,
1277 const char *name,
1278 void *buffer,
1279 size_t buffer_size)
cf1d6c76
TY		 1280{
1281 int ret;
1282 struct ocfs2_dinode *di = NULL;
cf1d6c76
TY		 1283 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1284 struct ocfs2_xattr_search xis = {
1285 .not_found = -ENODATA,
1286 };
1287 struct ocfs2_xattr_search xbs = {
1288 .not_found = -ENODATA,
1289 };
1290
8154da3d
TY		 1291 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1292 return -EOPNOTSUPP;
1293
cf1d6c76 1294 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
2b693005 1295 return -ENODATA;
cf1d6c76 1296
cf1d6c76
TY		 1297 xis.inode_bh = xbs.inode_bh = di_bh;
1298 di = (struct ocfs2_dinode *)di_bh->b_data;
1299
cf1d6c76
TY		 1300 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1301 buffer_size, &xis);
6c1e183e 1302 if (ret == -ENODATA && di->i_xattr_loc)
cf1d6c76
TY		 1303 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1304 buffer_size, &xbs);
4e3e9d02
TY		 1305
1306 return ret;
1307}
1308
1309/* ocfs2_xattr_get()
1310 *
1311 * Copy an extended attribute into the buffer provided.
1312 * Buffer is NULL to compute the size of buffer required.
1313 */
1314static int ocfs2_xattr_get(struct inode *inode,
1315 int name_index,
1316 const char *name,
1317 void *buffer,
1318 size_t buffer_size)
1319{
8818efaa 1320 int ret, had_lock;
4e3e9d02 1321 struct buffer_head *di_bh = NULL;
8818efaa 1322 struct ocfs2_lock_holder oh;
4e3e9d02 1323
8818efaa
ER		 1324 had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh);
1325 if (had_lock < 0) {
1326 mlog_errno(had_lock);
1327 return had_lock;
4e3e9d02 1328 }
5e64b0d9 1329 down_read(&OCFS2_I(inode)->ip_xattr_sem);
4e3e9d02
TY		 1330 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1331 name, buffer, buffer_size);
5e64b0d9 1332 up_read(&OCFS2_I(inode)->ip_xattr_sem);
4e3e9d02 1333
8818efaa 1334 ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
cf1d6c76
TY		 1335
1336 brelse(di_bh);
1337
1338 return ret;
1339}
1340
1341static int __ocfs2_xattr_set_value_outside(struct inode *inode,
85db90e7 1342 handle_t *handle,
492a8a33 1343 struct ocfs2_xattr_value_buf *vb,
cf1d6c76
TY		 1344 const void *value,
1345 int value_len)
1346{
71d548a6 1347 int ret = 0, i, cp_len;
cf1d6c76
TY		 1348 u16 blocksize = inode->i_sb->s_blocksize;
1349 u32 p_cluster, num_clusters;
1350 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1351 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1352 u64 blkno;
1353 struct buffer_head *bh = NULL;
492a8a33
TM		 1354 unsigned int ext_flags;
1355 struct ocfs2_xattr_value_root *xv = vb->vb_xv;
cf1d6c76
TY		 1356
1357 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1358
cf1d6c76
TY		 1359 while (cpos < clusters) {
1360 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1061f9c1 1361 &num_clusters, &xv->xr_list,
492a8a33 1362 &ext_flags);
cf1d6c76
TY		 1363 if (ret) {
1364 mlog_errno(ret);
85db90e7 1365 goto out;
cf1d6c76
TY		 1366 }
1367
492a8a33
TM		 1368 BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
1369
cf1d6c76
TY		 1370 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1371
1372 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
8cb471e8
JB		 1373 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1374 &bh, NULL);
cf1d6c76
TY		 1375 if (ret) {
1376 mlog_errno(ret);
85db90e7 1377 goto out;
cf1d6c76
TY		 1378 }
1379
1380 ret = ocfs2_journal_access(handle,
0cf2f763 1381 INODE_CACHE(inode),
cf1d6c76
TY		 1382 bh,
1383 OCFS2_JOURNAL_ACCESS_WRITE);
1384 if (ret < 0) {
1385 mlog_errno(ret);
85db90e7 1386 goto out;
cf1d6c76
TY		 1387 }
1388
1389 cp_len = value_len > blocksize ? blocksize : value_len;
1390 memcpy(bh->b_data, value, cp_len);
1391 value_len -= cp_len;
1392 value += cp_len;
1393 if (cp_len < blocksize)
1394 memset(bh->b_data + cp_len, 0,
1395 blocksize - cp_len);
1396
ec20cec7 1397 ocfs2_journal_dirty(handle, bh);
cf1d6c76
TY		 1398 brelse(bh);
1399 bh = NULL;
1400
1401 /*
1402 * XXX: do we need to empty all the following
1403 * blocks in this cluster?
1404 */
1405 if (!value_len)
1406 break;
1407 }
1408 cpos += num_clusters;
1409 }
cf1d6c76
TY		 1410out:
1411 brelse(bh);
1412
1413 return ret;
1414}
1415
69a3e539
JB		 1416static int ocfs2_xa_check_space_helper(int needed_space, int free_start,
1417 int num_entries)
1418{
1419 int free_space;
1420
1421 if (!needed_space)
1422 return 0;
1423
1424 free_space = free_start -
1425 sizeof(struct ocfs2_xattr_header) -
1426 (num_entries * sizeof(struct ocfs2_xattr_entry)) -
1427 OCFS2_XATTR_HEADER_GAP;
1428 if (free_space < 0)
1429 return -EIO;
1430 if (free_space < needed_space)
1431 return -ENOSPC;
1432
1433 return 0;
1434}
1435
cf2bc809
JB		 1436static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc,
1437 int type)
1438{
1439 return loc->xl_ops->xlo_journal_access(handle, loc, type);
1440}
1441
1442static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc)
1443{
1444 loc->xl_ops->xlo_journal_dirty(handle, loc);
1445}
1446
69a3e539
JB		 1447/* Give a pointer into the storage for the given offset */
1448static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset)
1449{
1450 BUG_ON(offset >= loc->xl_size);
1451 return loc->xl_ops->xlo_offset_pointer(loc, offset);
1452}
1453
11179f2c
JB		 1454/*
1455 * Wipe the name+value pair and allow the storage to reclaim it. This
1456 * must be followed by either removal of the entry or a call to
1457 * ocfs2_xa_add_namevalue().
1458 */
1459static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc)
1460{
1461 loc->xl_ops->xlo_wipe_namevalue(loc);
1462}
1463
69a3e539
JB		 1464/*
1465 * Find lowest offset to a name+value pair. This is the start of our
1466 * downward-growing free space.
1467 */
1468static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc)
1469{
1470 return loc->xl_ops->xlo_get_free_start(loc);
1471}
1472
1473/* Can we reuse loc->xl_entry for xi? */
1474static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc,
1475 struct ocfs2_xattr_info *xi)
1476{
1477 return loc->xl_ops->xlo_can_reuse(loc, xi);
1478}
1479
1480/* How much free space is needed to set the new value */
1481static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc,
1482 struct ocfs2_xattr_info *xi)
1483{
1484 return loc->xl_ops->xlo_check_space(loc, xi);
1485}
1486
94b07b6f
JQ		 1487static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1488{
1489 loc->xl_ops->xlo_add_entry(loc, name_hash);
1490 loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash);
1491 /*
1492 * We can't leave the new entry's xe_name_offset at zero or
1493 * add_namevalue() will go nuts. We set it to the size of our
1494 * storage so that it can never be less than any other entry.
1495 */
1496 loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size);
1497}
1498
69a3e539
JB		 1499static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc,
1500 struct ocfs2_xattr_info *xi)
1501{
1502 int size = namevalue_size_xi(xi);
1503 int nameval_offset;
1504 char *nameval_buf;
1505
1506 loc->xl_ops->xlo_add_namevalue(loc, size);
1507 loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
1508 loc->xl_entry->xe_name_len = xi->xi_name_len;
1509 ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index);
1510 ocfs2_xattr_set_local(loc->xl_entry,
1511 xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE);
1512
1513 nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1514 nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
1515 memset(nameval_buf, 0, size);
1516 memcpy(nameval_buf, xi->xi_name, xi->xi_name_len);
1517}
1518
3fc12afa
JB		 1519static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc,
1520 struct ocfs2_xattr_value_buf *vb)
1521{
1522 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1523 int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
1524
1525 /* Value bufs are for value trees */
73857ee0 1526 BUG_ON(ocfs2_xattr_is_local(loc->xl_entry));
3fc12afa
JB		 1527 BUG_ON(namevalue_size_xe(loc->xl_entry) !=
1528 (name_size + OCFS2_XATTR_ROOT_SIZE));
1529
1530 loc->xl_ops->xlo_fill_value_buf(loc, vb);
1531 vb->vb_xv =
1532 (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc,
1533 nameval_offset +
1534 name_size);
1535}
1536
cf2bc809
JB		 1537static int ocfs2_xa_block_journal_access(handle_t *handle,
1538 struct ocfs2_xa_loc *loc, int type)
1539{
1540 struct buffer_head *bh = loc->xl_storage;
1541 ocfs2_journal_access_func access;
1542
1543 if (loc->xl_size == (bh->b_size -
1544 offsetof(struct ocfs2_xattr_block,
1545 xb_attrs.xb_header)))
1546 access = ocfs2_journal_access_xb;
1547 else
1548 access = ocfs2_journal_access_di;
1549 return access(handle, INODE_CACHE(loc->xl_inode), bh, type);
1550}
1551
1552static void ocfs2_xa_block_journal_dirty(handle_t *handle,
1553 struct ocfs2_xa_loc *loc)
1554{
1555 struct buffer_head *bh = loc->xl_storage;
1556
1557 ocfs2_journal_dirty(handle, bh);
1558}
1559
11179f2c
JB		 1560static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc,
1561 int offset)
1562{
11179f2c
JB		 1563 return (char *)loc->xl_header + offset;
1564}
1565
69a3e539
JB		 1566static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc,
1567 struct ocfs2_xattr_info *xi)
1568{
1569 /*
1570 * Block storage is strict. If the sizes aren't exact, we will
1571 * remove the old one and reinsert the new.
1572 */
1573 return namevalue_size_xe(loc->xl_entry) ==
1574 namevalue_size_xi(xi);
1575}
1576
1577static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc)
1578{
1579 struct ocfs2_xattr_header *xh = loc->xl_header;
1580 int i, count = le16_to_cpu(xh->xh_count);
1581 int offset, free_start = loc->xl_size;
1582
1583 for (i = 0; i < count; i++) {
1584 offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
1585 if (offset < free_start)
1586 free_start = offset;
1587 }
1588
1589 return free_start;
1590}
1591
1592static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc,
1593 struct ocfs2_xattr_info *xi)
1594{
1595 int count = le16_to_cpu(loc->xl_header->xh_count);
1596 int free_start = ocfs2_xa_get_free_start(loc);
1597 int needed_space = ocfs2_xi_entry_usage(xi);
1598
1599 /*
1600 * Block storage will reclaim the original entry before inserting
1601 * the new value, so we only need the difference. If the new
1602 * entry is smaller than the old one, we don't need anything.
1603 */
1604 if (loc->xl_entry) {
1605 /* Don't need space if we're reusing! */
1606 if (ocfs2_xa_can_reuse_entry(loc, xi))
1607 needed_space = 0;
1608 else
1609 needed_space -= ocfs2_xe_entry_usage(loc->xl_entry);
1610 }
1611 if (needed_space < 0)
1612 needed_space = 0;
1613 return ocfs2_xa_check_space_helper(needed_space, free_start, count);
1614}
1615
11179f2c
JB		 1616/*
1617 * Block storage for xattrs keeps the name+value pairs compacted. When
1618 * we remove one, we have to shift any that preceded it towards the end.
1619 */
1620static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc)
1621{
1622 int i, offset;
1623 int namevalue_offset, first_namevalue_offset, namevalue_size;
1624 struct ocfs2_xattr_entry *entry = loc->xl_entry;
1625 struct ocfs2_xattr_header *xh = loc->xl_header;
11179f2c
JB		 1626 int count = le16_to_cpu(xh->xh_count);
1627
1628 namevalue_offset = le16_to_cpu(entry->xe_name_offset);
199799a3 1629 namevalue_size = namevalue_size_xe(entry);
69a3e539 1630 first_namevalue_offset = ocfs2_xa_get_free_start(loc);
11179f2c
JB		 1631
1632 /* Shift the name+value pairs */
1633 memmove((char *)xh + first_namevalue_offset + namevalue_size,
1634 (char *)xh + first_namevalue_offset,
1635 namevalue_offset - first_namevalue_offset);
1636 memset((char *)xh + first_namevalue_offset, 0, namevalue_size);
1637
1638 /* Now tell xh->xh_entries about it */
1639 for (i = 0; i < count; i++) {
1640 offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
dfe4d3d6 1641 if (offset <= namevalue_offset)
11179f2c
JB		 1642 le16_add_cpu(&xh->xh_entries[i].xe_name_offset,
1643 namevalue_size);
1644 }
1645
1646 /*
1647 * Note that we don't update xh_free_start or xh_name_value_len
1648 * because they're not used in block-stored xattrs.
1649 */
1650}
1651
69a3e539
JB		 1652static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1653{
1654 int count = le16_to_cpu(loc->xl_header->xh_count);
1655 loc->xl_entry = &(loc->xl_header->xh_entries[count]);
1656 le16_add_cpu(&loc->xl_header->xh_count, 1);
1657 memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
1658}
1659
1660static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size)
1661{
1662 int free_start = ocfs2_xa_get_free_start(loc);
1663
1664 loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size);
1665}
1666
3fc12afa
JB		 1667static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc,
1668 struct ocfs2_xattr_value_buf *vb)
1669{
1670 struct buffer_head *bh = loc->xl_storage;
1671
1672 if (loc->xl_size == (bh->b_size -
1673 offsetof(struct ocfs2_xattr_block,
1674 xb_attrs.xb_header)))
1675 vb->vb_access = ocfs2_journal_access_xb;
1676 else
1677 vb->vb_access = ocfs2_journal_access_di;
1678 vb->vb_bh = bh;
1679}
1680
11179f2c
JB		 1681/*
1682 * Operations for xattrs stored in blocks. This includes inline inode
1683 * storage and unindexed ocfs2_xattr_blocks.
1684 */
1685static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = {
cf2bc809
JB		 1686 .xlo_journal_access = ocfs2_xa_block_journal_access,
1687 .xlo_journal_dirty = ocfs2_xa_block_journal_dirty,
11179f2c 1688 .xlo_offset_pointer = ocfs2_xa_block_offset_pointer,
69a3e539
JB		 1689 .xlo_check_space = ocfs2_xa_block_check_space,
1690 .xlo_can_reuse = ocfs2_xa_block_can_reuse,
1691 .xlo_get_free_start = ocfs2_xa_block_get_free_start,
11179f2c 1692 .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue,
69a3e539
JB		 1693 .xlo_add_entry = ocfs2_xa_block_add_entry,
1694 .xlo_add_namevalue = ocfs2_xa_block_add_namevalue,
3fc12afa 1695 .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf,
11179f2c
JB		 1696};
1697
cf2bc809
JB		 1698static int ocfs2_xa_bucket_journal_access(handle_t *handle,
1699 struct ocfs2_xa_loc *loc, int type)
1700{
1701 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1702
1703 return ocfs2_xattr_bucket_journal_access(handle, bucket, type);
1704}
1705
1706static void ocfs2_xa_bucket_journal_dirty(handle_t *handle,
1707 struct ocfs2_xa_loc *loc)
1708{
1709 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1710
1711 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
1712}
1713
11179f2c
JB		 1714static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
1715 int offset)
1716{
1717 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1718 int block, block_offset;
1719
11179f2c 1720 /* The header is at the front of the bucket */
cf2bc809
JB		 1721 block = offset >> loc->xl_inode->i_sb->s_blocksize_bits;
1722 block_offset = offset % loc->xl_inode->i_sb->s_blocksize;
11179f2c
JB		 1723
1724 return bucket_block(bucket, block) + block_offset;
1725}
1726
69a3e539
JB		 1727static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc,
1728 struct ocfs2_xattr_info *xi)
1729{
1730 return namevalue_size_xe(loc->xl_entry) >=
1731 namevalue_size_xi(xi);
1732}
1733
1734static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc)
1735{
1736 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1737 return le16_to_cpu(bucket_xh(bucket)->xh_free_start);
1738}
1739
1740static int ocfs2_bucket_align_free_start(struct super_block *sb,
1741 int free_start, int size)
1742{
1743 /*
1744 * We need to make sure that the name+value pair fits within
1745 * one block.
1746 */
1747 if (((free_start - size) >> sb->s_blocksize_bits) !=
1748 ((free_start - 1) >> sb->s_blocksize_bits))
1749 free_start -= free_start % sb->s_blocksize;
1750
1751 return free_start;
1752}
1753
1754static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc,
1755 struct ocfs2_xattr_info *xi)
1756{
1757 int rc;
1758 int count = le16_to_cpu(loc->xl_header->xh_count);
1759 int free_start = ocfs2_xa_get_free_start(loc);
1760 int needed_space = ocfs2_xi_entry_usage(xi);
1761 int size = namevalue_size_xi(xi);
cf2bc809 1762 struct super_block *sb = loc->xl_inode->i_sb;
69a3e539
JB		 1763
1764 /*
1765 * Bucket storage does not reclaim name+value pairs it cannot
1766 * reuse. They live as holes until the bucket fills, and then
1767 * the bucket is defragmented. However, the bucket can reclaim
1768 * the ocfs2_xattr_entry.
1769 */
1770 if (loc->xl_entry) {
1771 /* Don't need space if we're reusing! */
1772 if (ocfs2_xa_can_reuse_entry(loc, xi))
1773 needed_space = 0;
1774 else
1775 needed_space -= sizeof(struct ocfs2_xattr_entry);
1776 }
1777 BUG_ON(needed_space < 0);
1778
1779 if (free_start < size) {
1780 if (needed_space)
1781 return -ENOSPC;
1782 } else {
1783 /*
1784 * First we check if it would fit in the first place.
1785 * Below, we align the free start to a block. This may
1786 * slide us below the minimum gap. By checking unaligned
1787 * first, we avoid that error.
1788 */
1789 rc = ocfs2_xa_check_space_helper(needed_space, free_start,
1790 count);
1791 if (rc)
1792 return rc;
1793 free_start = ocfs2_bucket_align_free_start(sb, free_start,
1794 size);
1795 }
1796 return ocfs2_xa_check_space_helper(needed_space, free_start, count);
1797}
1798
11179f2c
JB		 1799static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc)
1800{
199799a3
JB		 1801 le16_add_cpu(&loc->xl_header->xh_name_value_len,
1802 -namevalue_size_xe(loc->xl_entry));
11179f2c
JB		 1803}
1804
69a3e539
JB		 1805static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1806{
1807 struct ocfs2_xattr_header *xh = loc->xl_header;
1808 int count = le16_to_cpu(xh->xh_count);
1809 int low = 0, high = count - 1, tmp;
1810 struct ocfs2_xattr_entry *tmp_xe;
1811
1812 /*
1813 * We keep buckets sorted by name_hash, so we need to find
1814 * our insert place.
1815 */
1816 while (low <= high && count) {
1817 tmp = (low + high) / 2;
1818 tmp_xe = &xh->xh_entries[tmp];
1819
1820 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
1821 low = tmp + 1;
1822 else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash))
1823 high = tmp - 1;
1824 else {
1825 low = tmp;
1826 break;
1827 }
1828 }
1829
1830 if (low != count)
1831 memmove(&xh->xh_entries[low + 1],
1832 &xh->xh_entries[low],
1833 ((count - low) * sizeof(struct ocfs2_xattr_entry)));
1834
1835 le16_add_cpu(&xh->xh_count, 1);
1836 loc->xl_entry = &xh->xh_entries[low];
1837 memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
1838}
1839
1840static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size)
1841{
1842 int free_start = ocfs2_xa_get_free_start(loc);
1843 struct ocfs2_xattr_header *xh = loc->xl_header;
cf2bc809 1844 struct super_block *sb = loc->xl_inode->i_sb;
69a3e539
JB		 1845 int nameval_offset;
1846
1847 free_start = ocfs2_bucket_align_free_start(sb, free_start, size);
1848 nameval_offset = free_start - size;
1849 loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset);
1850 xh->xh_free_start = cpu_to_le16(nameval_offset);
1851 le16_add_cpu(&xh->xh_name_value_len, size);
1852
1853}
1854
3fc12afa
JB		 1855static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc,
1856 struct ocfs2_xattr_value_buf *vb)
1857{
1858 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
cf2bc809 1859 struct super_block *sb = loc->xl_inode->i_sb;
3fc12afa
JB		 1860 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1861 int size = namevalue_size_xe(loc->xl_entry);
1862 int block_offset = nameval_offset >> sb->s_blocksize_bits;
1863
1864 /* Values are not allowed to straddle block boundaries */
1865 BUG_ON(block_offset !=
1866 ((nameval_offset + size - 1) >> sb->s_blocksize_bits));
1867 /* We expect the bucket to be filled in */
1868 BUG_ON(!bucket->bu_bhs[block_offset]);
1869
1870 vb->vb_access = ocfs2_journal_access;
1871 vb->vb_bh = bucket->bu_bhs[block_offset];
1872}
1873
11179f2c
JB		 1874/* Operations for xattrs stored in buckets. */
1875static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
cf2bc809
JB		 1876 .xlo_journal_access = ocfs2_xa_bucket_journal_access,
1877 .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty,
11179f2c 1878 .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer,
69a3e539
JB		 1879 .xlo_check_space = ocfs2_xa_bucket_check_space,
1880 .xlo_can_reuse = ocfs2_xa_bucket_can_reuse,
1881 .xlo_get_free_start = ocfs2_xa_bucket_get_free_start,
11179f2c 1882 .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue,
69a3e539
JB		 1883 .xlo_add_entry = ocfs2_xa_bucket_add_entry,
1884 .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue,
3fc12afa 1885 .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf,
11179f2c
JB		 1886};
1887
399ff3a7
JB		 1888static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc)
1889{
1890 struct ocfs2_xattr_value_buf vb;
1891
1892 if (ocfs2_xattr_is_local(loc->xl_entry))
1893 return 0;
1894
1895 ocfs2_xa_fill_value_buf(loc, &vb);
1896 return le32_to_cpu(vb.vb_xv->xr_clusters);
1897}
1898
73857ee0
JB		 1899static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes,
1900 struct ocfs2_xattr_set_ctxt *ctxt)
1901{
1902 int trunc_rc, access_rc;
1903 struct ocfs2_xattr_value_buf vb;
1904
1905 ocfs2_xa_fill_value_buf(loc, &vb);
1906 trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes,
1907 ctxt);
1908
1909 /*
1910 * The caller of ocfs2_xa_value_truncate() has already called
1911 * ocfs2_xa_journal_access on the loc. However, The truncate code
1912 * calls ocfs2_extend_trans(). This may commit the previous
1913 * transaction and open a new one. If this is a bucket, truncate
1914 * could leave only vb->vb_bh set up for journaling. Meanwhile,
1915 * the caller is expecting to dirty the entire bucket. So we must
1916 * reset the journal work. We do this even if truncate has failed,
1917 * as it could have failed after committing the extend.
1918 */
1919 access_rc = ocfs2_xa_journal_access(ctxt->handle, loc,
1920 OCFS2_JOURNAL_ACCESS_WRITE);
1921
1922 /* Errors in truncate take precedence */
1923 return trunc_rc ? trunc_rc : access_rc;
1924}
1925
11179f2c
JB		 1926static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
1927{
bde1e540
JB		 1928 int index, count;
1929 struct ocfs2_xattr_header *xh = loc->xl_header;
1930 struct ocfs2_xattr_entry *entry = loc->xl_entry;
1931
11179f2c 1932 ocfs2_xa_wipe_namevalue(loc);
bde1e540
JB		 1933 loc->xl_entry = NULL;
1934
1935 le16_add_cpu(&xh->xh_count, -1);
1936 count = le16_to_cpu(xh->xh_count);
1937
1938 /*
1939 * Only zero out the entry if there are more remaining. This is
1940 * important for an empty bucket, as it keeps track of the
1941 * bucket's hash value. It doesn't hurt empty block storage.
1942 */
1943 if (count) {
1944 index = ((char *)entry - (char *)&xh->xh_entries) /
1945 sizeof(struct ocfs2_xattr_entry);
1946 memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1],
1947 (count - index) * sizeof(struct ocfs2_xattr_entry));
1948 memset(&xh->xh_entries[count], 0,
1949 sizeof(struct ocfs2_xattr_entry));
1950 }
11179f2c
JB		 1951}
1952
399ff3a7
JB		 1953/*
1954 * If we have a problem adjusting the size of an external value during
1955 * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr
1956 * in an intermediate state. For example, the value may be partially
1957 * truncated.
1958 *
1959 * If the value tree hasn't changed, the extend/truncate went nowhere.
1960 * We have nothing to do. The caller can treat it as a straight error.
1961 *
1962 * If the value tree got partially truncated, we now have a corrupted
1963 * extended attribute. We're going to wipe its entry and leak the
1964 * clusters. Better to leak some storage than leave a corrupt entry.
1965 *
1966 * If the value tree grew, it obviously didn't grow enough for the
1967 * new entry. We're not going to try and reclaim those clusters either.
1968 * If there was already an external value there (orig_clusters != 0),
1969 * the new clusters are attached safely and we can just leave the old
1970 * value in place. If there was no external value there, we remove
1971 * the entry.
1972 *
1973 * This way, the xattr block we store in the journal will be consistent.
1974 * If the size change broke because of the journal, no changes will hit
1975 * disk anyway.
1976 */
1977static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc,
1978 const char *what,
1979 unsigned int orig_clusters)
1980{
1981 unsigned int new_clusters = ocfs2_xa_value_clusters(loc);
1982 char *nameval_buf = ocfs2_xa_offset_pointer(loc,
1983 le16_to_cpu(loc->xl_entry->xe_name_offset));
1984
1985 if (new_clusters < orig_clusters) {
1986 mlog(ML_ERROR,
1987 "Partial truncate while %s xattr %.*s. Leaking "
1988 "%u clusters and removing the entry\n",
1989 what, loc->xl_entry->xe_name_len, nameval_buf,
1990 orig_clusters - new_clusters);
1991 ocfs2_xa_remove_entry(loc);
1992 } else if (!orig_clusters) {
1993 mlog(ML_ERROR,
1994 "Unable to allocate an external value for xattr "
1995 "%.*s safely. Leaking %u clusters and removing the "
1996 "entry\n",
1997 loc->xl_entry->xe_name_len, nameval_buf,
1998 new_clusters - orig_clusters);
1999 ocfs2_xa_remove_entry(loc);
2000 } else if (new_clusters > orig_clusters)
2001 mlog(ML_ERROR,
2002 "Unable to grow xattr %.*s safely. %u new clusters "
2003 "have been added, but the value will not be "
2004 "modified\n",
2005 loc->xl_entry->xe_name_len, nameval_buf,
2006 new_clusters - orig_clusters);
2007}
2008
73857ee0
JB		 2009static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc,
2010 struct ocfs2_xattr_set_ctxt *ctxt)
2011{
2012 int rc = 0;
399ff3a7 2013 unsigned int orig_clusters;
73857ee0
JB		 2014
2015 if (!ocfs2_xattr_is_local(loc->xl_entry)) {
399ff3a7 2016 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0
JB		 2017 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
2018 if (rc) {
2019 mlog_errno(rc);
399ff3a7
JB		 2020 /*
2021 * Since this is remove, we can return 0 if
2022 * ocfs2_xa_cleanup_value_truncate() is going to
2023 * wipe the entry anyway. So we check the
2024 * cluster count as well.
2025 */
2026 if (orig_clusters != ocfs2_xa_value_clusters(loc))
2027 rc = 0;
2028 ocfs2_xa_cleanup_value_truncate(loc, "removing",
2029 orig_clusters);
2030 if (rc)
2031 goto out;
73857ee0
JB		 2032 }
2033 }
2034
2035 ocfs2_xa_remove_entry(loc);
2036
2037out:
2038 return rc;
2039}
2040
2041static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc)
2042{
2043 int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
2044 char *nameval_buf;
2045
2046 nameval_buf = ocfs2_xa_offset_pointer(loc,
2047 le16_to_cpu(loc->xl_entry->xe_name_offset));
2048 memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE);
2049}
2050
2051/*
2052 * Take an existing entry and make it ready for the new value. This
2053 * won't allocate space, but it may free space. It should be ready for
2054 * ocfs2_xa_prepare_entry() to finish the work.
2055 */
2056static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc,
2057 struct ocfs2_xattr_info *xi,
2058 struct ocfs2_xattr_set_ctxt *ctxt)
2059{
2060 int rc = 0;
2061 int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
399ff3a7 2062 unsigned int orig_clusters;
73857ee0
JB		 2063 char *nameval_buf;
2064 int xe_local = ocfs2_xattr_is_local(loc->xl_entry);
2065 int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE;
2066
2067 BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) !=
2068 name_size);
2069
2070 nameval_buf = ocfs2_xa_offset_pointer(loc,
2071 le16_to_cpu(loc->xl_entry->xe_name_offset));
2072 if (xe_local) {
2073 memset(nameval_buf + name_size, 0,
2074 namevalue_size_xe(loc->xl_entry) - name_size);
2075 if (!xi_local)
2076 ocfs2_xa_install_value_root(loc);
2077 } else {
399ff3a7 2078 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0
JB		 2079 if (xi_local) {
2080 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
399ff3a7 2081 if (rc < 0)
73857ee0 2082 mlog_errno(rc);
399ff3a7
JB		 2083 else
2084 memset(nameval_buf + name_size, 0,
2085 namevalue_size_xe(loc->xl_entry) -
2086 name_size);
73857ee0
JB		 2087 } else if (le64_to_cpu(loc->xl_entry->xe_value_size) >
2088 xi->xi_value_len) {
2089 rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len,
2090 ctxt);
399ff3a7 2091 if (rc < 0)
73857ee0 2092 mlog_errno(rc);
399ff3a7
JB		 2093 }
2094
2095 if (rc) {
2096 ocfs2_xa_cleanup_value_truncate(loc, "reusing",
2097 orig_clusters);
2098 goto out;
73857ee0
JB		 2099 }
2100 }
2101
2102 loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
2103 ocfs2_xattr_set_local(loc->xl_entry, xi_local);
2104
2105out:
2106 return rc;
2107}
2108
69a3e539
JB		 2109/*
2110 * Prepares loc->xl_entry to receive the new xattr. This includes
2111 * properly setting up the name+value pair region. If loc->xl_entry
2112 * already exists, it will take care of modifying it appropriately.
69a3e539
JB		 2113 *
2114 * Note that this modifies the data. You did journal_access already,
2115 * right?
2116 */
2117static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
2118 struct ocfs2_xattr_info *xi,
73857ee0
JB		 2119 u32 name_hash,
2120 struct ocfs2_xattr_set_ctxt *ctxt)
69a3e539
JB		 2121{
2122 int rc = 0;
399ff3a7
JB		 2123 unsigned int orig_clusters;
2124 __le64 orig_value_size = 0;
69a3e539 2125
69a3e539
JB		 2126 rc = ocfs2_xa_check_space(loc, xi);
2127 if (rc)
2128 goto out;
2129
94b07b6f
JQ		 2130 if (loc->xl_entry) {
2131 if (ocfs2_xa_can_reuse_entry(loc, xi)) {
2132 orig_value_size = loc->xl_entry->xe_value_size;
2133 rc = ocfs2_xa_reuse_entry(loc, xi, ctxt);
2134 if (rc)
2135 goto out;
2136 goto alloc_value;
2137 }
56e94ea1 2138
94b07b6f
JQ		 2139 if (!ocfs2_xattr_is_local(loc->xl_entry)) {
2140 orig_clusters = ocfs2_xa_value_clusters(loc);
2141 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
2142 if (rc) {
2143 mlog_errno(rc);
2144 ocfs2_xa_cleanup_value_truncate(loc,
2145 "overwriting",
2146 orig_clusters);
2147 goto out;
2148 }
73857ee0 2149 }
94b07b6f
JQ		 2150 ocfs2_xa_wipe_namevalue(loc);
2151 } else
2152 ocfs2_xa_add_entry(loc, name_hash);
69a3e539
JB		 2153
2154 /*
2155 * If we get here, we have a blank entry. Fill it. We grow our
2156 * name+value pair back from the end.
2157 */
2158 ocfs2_xa_add_namevalue(loc, xi);
73857ee0
JB		 2159 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
2160 ocfs2_xa_install_value_root(loc);
2161
2162alloc_value:
2163 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
399ff3a7 2164 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0 2165 rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt);
399ff3a7 2166 if (rc < 0) {
5f5261ac 2167 ctxt->set_abort = 1;
399ff3a7
JB		 2168 ocfs2_xa_cleanup_value_truncate(loc, "growing",
2169 orig_clusters);
d5a7df06
TM		 2170 /*
2171 * If we were growing an existing value,
2172 * ocfs2_xa_cleanup_value_truncate() won't remove
2173 * the entry. We need to restore the original value
2174 * size.
2175 */
2176 if (loc->xl_entry) {
2177 BUG_ON(!orig_value_size);
2178 loc->xl_entry->xe_value_size = orig_value_size;
2179 }
73857ee0 2180 mlog_errno(rc);
399ff3a7 2181 }
73857ee0 2182 }
69a3e539
JB		 2183
2184out:
2185 return rc;
2186}
2187
2188/*
73857ee0
JB		 2189 * Store the value portion of the name+value pair. This will skip
2190 * values that are stored externally. Their tree roots were set up
2191 * by ocfs2_xa_prepare_entry().
69a3e539 2192 */
73857ee0
JB		 2193static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc,
2194 struct ocfs2_xattr_info *xi,
2195 struct ocfs2_xattr_set_ctxt *ctxt)
69a3e539 2196{
73857ee0 2197 int rc = 0;
69a3e539
JB		 2198 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
2199 int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
69a3e539 2200 char *nameval_buf;
73857ee0 2201 struct ocfs2_xattr_value_buf vb;
69a3e539 2202
69a3e539 2203 nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
73857ee0
JB		 2204 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
2205 ocfs2_xa_fill_value_buf(loc, &vb);
2206 rc = __ocfs2_xattr_set_value_outside(loc->xl_inode,
2207 ctxt->handle, &vb,
2208 xi->xi_value,
2209 xi->xi_value_len);
2210 } else
2211 memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len);
2212
73857ee0 2213 return rc;
69a3e539
JB		 2214}
2215
bca5e9bd
JB		 2216static int ocfs2_xa_set(struct ocfs2_xa_loc *loc,
2217 struct ocfs2_xattr_info *xi,
2218 struct ocfs2_xattr_set_ctxt *ctxt)
2219{
2220 int ret;
2221 u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name,
2222 xi->xi_name_len);
2223
2224 ret = ocfs2_xa_journal_access(ctxt->handle, loc,
2225 OCFS2_JOURNAL_ACCESS_WRITE);
2226 if (ret) {
2227 mlog_errno(ret);
2228 goto out;
2229 }
2230
399ff3a7
JB		 2231 /*
2232 * From here on out, everything is going to modify the buffer a
2233 * little. Errors are going to leave the xattr header in a
2234 * sane state. Thus, even with errors we dirty the sucker.
2235 */
2236
bca5e9bd
JB		 2237 /* Don't worry, we are never called with !xi_value and !xl_entry */
2238 if (!xi->xi_value) {
2239 ret = ocfs2_xa_remove(loc, ctxt);
399ff3a7 2240 goto out_dirty;
bca5e9bd
JB		 2241 }
2242
2243 ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt);
2244 if (ret) {
2245 if (ret != -ENOSPC)
2246 mlog_errno(ret);
399ff3a7 2247 goto out_dirty;
bca5e9bd
JB		 2248 }
2249
2250 ret = ocfs2_xa_store_value(loc, xi, ctxt);
399ff3a7 2251 if (ret)
bca5e9bd 2252 mlog_errno(ret);
bca5e9bd 2253
399ff3a7 2254out_dirty:
bca5e9bd
JB		 2255 ocfs2_xa_journal_dirty(ctxt->handle, loc);
2256
2257out:
2258 return ret;
2259}
2260
11179f2c
JB		 2261static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
2262 struct inode *inode,
2263 struct buffer_head *bh,
2264 struct ocfs2_xattr_entry *entry)
2265{
2266 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2267
139fface
JB		 2268 BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL));
2269
cf2bc809 2270 loc->xl_inode = inode;
11179f2c
JB		 2271 loc->xl_ops = &ocfs2_xa_block_loc_ops;
2272 loc->xl_storage = bh;
2273 loc->xl_entry = entry;
139fface 2274 loc->xl_size = le16_to_cpu(di->i_xattr_inline_size);
11179f2c
JB		 2275 loc->xl_header =
2276 (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size -
2277 loc->xl_size);
2278}
2279
2280static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc,
cf2bc809 2281 struct inode *inode,
11179f2c
JB		 2282 struct buffer_head *bh,
2283 struct ocfs2_xattr_entry *entry)
2284{
2285 struct ocfs2_xattr_block *xb =
2286 (struct ocfs2_xattr_block *)bh->b_data;
2287
2288 BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED);
2289
cf2bc809 2290 loc->xl_inode = inode;
11179f2c
JB		 2291 loc->xl_ops = &ocfs2_xa_block_loc_ops;
2292 loc->xl_storage = bh;
2293 loc->xl_header = &(xb->xb_attrs.xb_header);
2294 loc->xl_entry = entry;
2295 loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block,
2296 xb_attrs.xb_header);
2297}
2298
2299static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc,
2300 struct ocfs2_xattr_bucket *bucket,
2301 struct ocfs2_xattr_entry *entry)
2302{
cf2bc809 2303 loc->xl_inode = bucket->bu_inode;
11179f2c
JB		 2304 loc->xl_ops = &ocfs2_xa_bucket_loc_ops;
2305 loc->xl_storage = bucket;
2306 loc->xl_header = bucket_xh(bucket);
2307 loc->xl_entry = entry;
2308 loc->xl_size = OCFS2_XATTR_BUCKET_SIZE;
2309}
2310
ce9c5a54
TM		 2311/*
2312 * In xattr remove, if it is stored outside and refcounted, we may have
2313 * the chance to split the refcount tree. So need the allocators.
2314 */
2315static int ocfs2_lock_xattr_remove_allocators(struct inode *inode,
2316 struct ocfs2_xattr_value_root *xv,
2317 struct ocfs2_caching_info *ref_ci,
2318 struct buffer_head *ref_root_bh,
2319 struct ocfs2_alloc_context **meta_ac,
2320 int *ref_credits)
2321{
2322 int ret, meta_add = 0;
2323 u32 p_cluster, num_clusters;
2324 unsigned int ext_flags;
2325
2326 *ref_credits = 0;
2327 ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster,
2328 &num_clusters,
2329 &xv->xr_list,
2330 &ext_flags);
2331 if (ret) {
2332 mlog_errno(ret);
2333 goto out;
2334 }
2335
2336 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
2337 goto out;
2338
2339 ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci,
2340 ref_root_bh, xv,
2341 &meta_add, ref_credits);
2342 if (ret) {
2343 mlog_errno(ret);
2344 goto out;
2345 }
2346
2347 ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb),
2348 meta_add, meta_ac);
2349 if (ret)
2350 mlog_errno(ret);
2351
2352out:
2353 return ret;
2354}
2355
cf1d6c76 2356static int ocfs2_remove_value_outside(struct inode*inode,
4311901d 2357 struct ocfs2_xattr_value_buf *vb,
ce9c5a54
TM		 2358 struct ocfs2_xattr_header *header,
2359 struct ocfs2_caching_info *ref_ci,
2360 struct buffer_head *ref_root_bh)
cf1d6c76 2361{
ce9c5a54 2362 int ret = 0, i, ref_credits;
78f30c31
TM		 2363 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2364 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
ce9c5a54 2365 void *val;
78f30c31
TM		 2366
2367 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
cf1d6c76
TY		 2368
2369 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
2370 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
2371
ce9c5a54
TM		 2372 if (ocfs2_xattr_is_local(entry))
2373 continue;
cf1d6c76 2374
ce9c5a54
TM		 2375 val = (void *)header +
2376 le16_to_cpu(entry->xe_name_offset);
2377 vb->vb_xv = (struct ocfs2_xattr_value_root *)
2378 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
2379
2380 ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv,
2381 ref_ci, ref_root_bh,
2382 &ctxt.meta_ac,
2383 &ref_credits);
2384
2385 ctxt.handle = ocfs2_start_trans(osb, ref_credits +
2386 ocfs2_remove_extent_credits(osb->sb));
2387 if (IS_ERR(ctxt.handle)) {
2388 ret = PTR_ERR(ctxt.handle);
2389 mlog_errno(ret);
2390 break;
2391 }
2392
2393 ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt);
ce9c5a54
TM		 2394
2395 ocfs2_commit_trans(osb, ctxt.handle);
2396 if (ctxt.meta_ac) {
2397 ocfs2_free_alloc_context(ctxt.meta_ac);
2398 ctxt.meta_ac = NULL;
cf1d6c76 2399 }
b8a0ae57
WW		 2400
2401 if (ret < 0) {
2402 mlog_errno(ret);
2403 break;
2404 }
2405
cf1d6c76
TY		 2406 }
2407
ce9c5a54
TM		 2408 if (ctxt.meta_ac)
2409 ocfs2_free_alloc_context(ctxt.meta_ac);
78f30c31
TM		 2410 ocfs2_schedule_truncate_log_flush(osb, 1);
2411 ocfs2_run_deallocs(osb, &ctxt.dealloc);
cf1d6c76
TY		 2412 return ret;
2413}
2414
2415static int ocfs2_xattr_ibody_remove(struct inode *inode,
ce9c5a54
TM		 2416 struct buffer_head *di_bh,
2417 struct ocfs2_caching_info *ref_ci,
2418 struct buffer_head *ref_root_bh)
cf1d6c76
TY		 2419{
2420
2421 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2422 struct ocfs2_xattr_header *header;
2423 int ret;
4311901d
JB		 2424 struct ocfs2_xattr_value_buf vb = {
2425 .vb_bh = di_bh,
2426 .vb_access = ocfs2_journal_access_di,
2427 };
cf1d6c76
TY		 2428
2429 header = (struct ocfs2_xattr_header *)
2430 ((void *)di + inode->i_sb->s_blocksize -
2431 le16_to_cpu(di->i_xattr_inline_size));
2432
ce9c5a54
TM		 2433 ret = ocfs2_remove_value_outside(inode, &vb, header,
2434 ref_ci, ref_root_bh);
cf1d6c76
TY		 2435
2436 return ret;
2437}
2438
ce9c5a54
TM		 2439struct ocfs2_rm_xattr_bucket_para {
2440 struct ocfs2_caching_info *ref_ci;
2441 struct buffer_head *ref_root_bh;
2442};
2443
cf1d6c76 2444static int ocfs2_xattr_block_remove(struct inode *inode,
ce9c5a54
TM		 2445 struct buffer_head *blk_bh,
2446 struct ocfs2_caching_info *ref_ci,
2447 struct buffer_head *ref_root_bh)
cf1d6c76
TY		 2448{
2449 struct ocfs2_xattr_block *xb;
cf1d6c76 2450 int ret = 0;
4311901d
JB		 2451 struct ocfs2_xattr_value_buf vb = {
2452 .vb_bh = blk_bh,
2453 .vb_access = ocfs2_journal_access_xb,
2454 };
ce9c5a54
TM		 2455 struct ocfs2_rm_xattr_bucket_para args = {
2456 .ref_ci = ref_ci,
2457 .ref_root_bh = ref_root_bh,
2458 };
cf1d6c76
TY		 2459
2460 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
a3944256
TM		 2461 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2462 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
ce9c5a54
TM		 2463 ret = ocfs2_remove_value_outside(inode, &vb, header,
2464 ref_ci, ref_root_bh);
a3944256 2465 } else
47bca495
TM		 2466 ret = ocfs2_iterate_xattr_index_block(inode,
2467 blk_bh,
2468 ocfs2_rm_xattr_cluster,
ce9c5a54 2469 &args);
cf1d6c76
TY		 2470
2471 return ret;
2472}
2473
08413899 2474static int ocfs2_xattr_free_block(struct inode *inode,
ce9c5a54
TM		 2475 u64 block,
2476 struct ocfs2_caching_info *ref_ci,
2477 struct buffer_head *ref_root_bh)
08413899
TM		 2478{
2479 struct inode *xb_alloc_inode;
2480 struct buffer_head *xb_alloc_bh = NULL;
2481 struct buffer_head *blk_bh = NULL;
2482 struct ocfs2_xattr_block *xb;
2483 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2484 handle_t *handle;
2485 int ret = 0;
2486 u64 blk, bg_blkno;
2487 u16 bit;
2488
4ae1d69b 2489 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
08413899
TM		 2490 if (ret < 0) {
2491 mlog_errno(ret);
2492 goto out;
2493 }
2494
ce9c5a54 2495 ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh);
08413899
TM		 2496 if (ret < 0) {
2497 mlog_errno(ret);
2498 goto out;
2499 }
2500
4ae1d69b 2501 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
08413899
TM		 2502 blk = le64_to_cpu(xb->xb_blkno);
2503 bit = le16_to_cpu(xb->xb_suballoc_bit);
74380c47
TM		 2504 if (xb->xb_suballoc_loc)
2505 bg_blkno = le64_to_cpu(xb->xb_suballoc_loc);
2506 else
2507 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
08413899
TM		 2508
2509 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
2510 EXTENT_ALLOC_SYSTEM_INODE,
2511 le16_to_cpu(xb->xb_suballoc_slot));
2512 if (!xb_alloc_inode) {
2513 ret = -ENOMEM;
2514 mlog_errno(ret);
2515 goto out;
2516 }
5955102c 2517 inode_lock(xb_alloc_inode);
08413899
TM		 2518
2519 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
2520 if (ret < 0) {
2521 mlog_errno(ret);
2522 goto out_mutex;
2523 }
2524
2525 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
2526 if (IS_ERR(handle)) {
2527 ret = PTR_ERR(handle);
2528 mlog_errno(ret);
2529 goto out_unlock;
2530 }
2531
2532 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
2533 bit, bg_blkno, 1);
2534 if (ret < 0)
2535 mlog_errno(ret);
2536
2537 ocfs2_commit_trans(osb, handle);
2538out_unlock:
2539 ocfs2_inode_unlock(xb_alloc_inode, 1);
2540 brelse(xb_alloc_bh);
2541out_mutex:
5955102c 2542 inode_unlock(xb_alloc_inode);
08413899
TM		 2543 iput(xb_alloc_inode);
2544out:
2545 brelse(blk_bh);
2546 return ret;
2547}
2548
cf1d6c76
TY		 2549/*
2550 * ocfs2_xattr_remove()
2551 *
2552 * Free extended attribute resources associated with this inode.
2553 */
2554int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
2555{
cf1d6c76
TY		 2556 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2557 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
ce9c5a54
TM		 2558 struct ocfs2_refcount_tree *ref_tree = NULL;
2559 struct buffer_head *ref_root_bh = NULL;
2560 struct ocfs2_caching_info *ref_ci = NULL;
cf1d6c76
TY		 2561 handle_t *handle;
2562 int ret;
2563
8154da3d
TY		 2564 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2565 return 0;
2566
cf1d6c76
TY		 2567 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
2568 return 0;
2569
84e40080 2570 if (ocfs2_is_refcount_inode(inode)) {
ce9c5a54
TM		 2571 ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb),
2572 le64_to_cpu(di->i_refcount_loc),
2573 1, &ref_tree, &ref_root_bh);
2574 if (ret) {
2575 mlog_errno(ret);
2576 goto out;
2577 }
2578 ref_ci = &ref_tree->rf_ci;
2579
2580 }
2581
cf1d6c76 2582 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
ce9c5a54
TM		 2583 ret = ocfs2_xattr_ibody_remove(inode, di_bh,
2584 ref_ci, ref_root_bh);
cf1d6c76
TY		 2585 if (ret < 0) {
2586 mlog_errno(ret);
2587 goto out;
2588 }
2589 }
cf1d6c76 2590
08413899
TM		 2591 if (di->i_xattr_loc) {
2592 ret = ocfs2_xattr_free_block(inode,
ce9c5a54
TM		 2593 le64_to_cpu(di->i_xattr_loc),
2594 ref_ci, ref_root_bh);
cf1d6c76
TY		 2595 if (ret < 0) {
2596 mlog_errno(ret);
2597 goto out;
2598 }
2599 }
2600
2601 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
2602 OCFS2_INODE_UPDATE_CREDITS);
2603 if (IS_ERR(handle)) {
2604 ret = PTR_ERR(handle);
2605 mlog_errno(ret);
2606 goto out;
2607 }
0cf2f763 2608 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
84008972 2609 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 2610 if (ret) {
2611 mlog_errno(ret);
2612 goto out_commit;
2613 }
2614
08413899 2615 di->i_xattr_loc = 0;
cf1d6c76
TY		 2616
2617 spin_lock(&oi->ip_lock);
2618 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
2619 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2620 spin_unlock(&oi->ip_lock);
6fdb702d 2621 ocfs2_update_inode_fsync_trans(handle, inode, 0);
cf1d6c76 2622
ec20cec7 2623 ocfs2_journal_dirty(handle, di_bh);
cf1d6c76
TY		 2624out_commit:
2625 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
2626out:
ce9c5a54
TM		 2627 if (ref_tree)
2628 ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1);
2629 brelse(ref_root_bh);
cf1d6c76
TY		 2630 return ret;
2631}
2632
2633static int ocfs2_xattr_has_space_inline(struct inode *inode,
2634 struct ocfs2_dinode *di)
2635{
2636 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2637 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
2638 int free;
2639
2640 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
2641 return 0;
2642
2643 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2644 struct ocfs2_inline_data *idata = &di->id2.i_data;
2645 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
2646 } else if (ocfs2_inode_is_fast_symlink(inode)) {
2647 free = ocfs2_fast_symlink_chars(inode->i_sb) -
2648 le64_to_cpu(di->i_size);
2649 } else {
2650 struct ocfs2_extent_list *el = &di->id2.i_list;
2651 free = (le16_to_cpu(el->l_count) -
2652 le16_to_cpu(el->l_next_free_rec)) *
2653 sizeof(struct ocfs2_extent_rec);
2654 }
2655 if (free >= xattrsize)
2656 return 1;
2657
2658 return 0;
2659}
2660
2661/*
2662 * ocfs2_xattr_ibody_find()
2663 *
2664 * Find extended attribute in inode block and
2665 * fill search info into struct ocfs2_xattr_search.
2666 */
2667static int ocfs2_xattr_ibody_find(struct inode *inode,
2668 int name_index,
2669 const char *name,
2670 struct ocfs2_xattr_search *xs)
2671{
2672 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2673 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2674 int ret;
2675 int has_space = 0;
2676
2677 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2678 return 0;
2679
2680 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2681 down_read(&oi->ip_alloc_sem);
2682 has_space = ocfs2_xattr_has_space_inline(inode, di);
2683 up_read(&oi->ip_alloc_sem);
2684 if (!has_space)
2685 return 0;
2686 }
2687
2688 xs->xattr_bh = xs->inode_bh;
2689 xs->end = (void *)di + inode->i_sb->s_blocksize;
2690 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
2691 xs->header = (struct ocfs2_xattr_header *)
2692 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
2693 else
2694 xs->header = (struct ocfs2_xattr_header *)
2695 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
2696 xs->base = (void *)xs->header;
2697 xs->here = xs->header->xh_entries;
2698
2699 /* Find the named attribute. */
2700 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
2701 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2702 if (ret && ret != -ENODATA)
2703 return ret;
2704 xs->not_found = ret;
2705 }
2706
2707 return 0;
2708}
2709
139fface
JB		 2710static int ocfs2_xattr_ibody_init(struct inode *inode,
2711 struct buffer_head *di_bh,
2712 struct ocfs2_xattr_set_ctxt *ctxt)
2713{
2714 int ret;
2715 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2716 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2717 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2718 unsigned int xattrsize = osb->s_xattr_inline_size;
2719
2720 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2721 ret = -ENOSPC;
2722 goto out;
2723 }
2724
2725 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh,
2726 OCFS2_JOURNAL_ACCESS_WRITE);
2727 if (ret) {
2728 mlog_errno(ret);
2729 goto out;
2730 }
2731
2732 /*
2733 * Adjust extent record count or inline data size
2734 * to reserve space for extended attribute.
2735 */
2736 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2737 struct ocfs2_inline_data *idata = &di->id2.i_data;
2738 le16_add_cpu(&idata->id_count, -xattrsize);
2739 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
2740 struct ocfs2_extent_list *el = &di->id2.i_list;
2741 le16_add_cpu(&el->l_count, -(xattrsize /
2742 sizeof(struct ocfs2_extent_rec)));
2743 }
2744 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
2745
2746 spin_lock(&oi->ip_lock);
2747 oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL;
2748 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2749 spin_unlock(&oi->ip_lock);
2750
ec20cec7 2751 ocfs2_journal_dirty(ctxt->handle, di_bh);
139fface
JB		 2752
2753out:
2754 return ret;
2755}
2756
cf1d6c76
TY		 2757/*
2758 * ocfs2_xattr_ibody_set()
2759 *
2760 * Set, replace or remove an extended attribute into inode block.
2761 *
2762 */
2763static int ocfs2_xattr_ibody_set(struct inode *inode,
2764 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2765 struct ocfs2_xattr_search *xs,
2766 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76 2767{
139fface 2768 int ret;
cf1d6c76 2769 struct ocfs2_inode_info *oi = OCFS2_I(inode);
139fface 2770 struct ocfs2_xa_loc loc;
cf1d6c76
TY		 2771
2772 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2773 return -ENOSPC;
2774
2775 down_write(&oi->ip_alloc_sem);
139fface
JB		 2776 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2777 ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt);
2778 if (ret) {
2779 if (ret != -ENOSPC)
2780 mlog_errno(ret);
2781 goto out;
2782 }
2783 }
2784
2785 ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh,
2786 xs->not_found ? NULL : xs->here);
2787 ret = ocfs2_xa_set(&loc, xi, ctxt);
2788 if (ret) {
2789 if (ret != -ENOSPC)
2790 mlog_errno(ret);
2791 goto out;
2792 }
2793 xs->here = loc.xl_entry;
2794
cf1d6c76
TY		 2795out:
2796 up_write(&oi->ip_alloc_sem);
2797
2798 return ret;
2799}
2800
2801/*
2802 * ocfs2_xattr_block_find()
2803 *
2804 * Find extended attribute in external block and
2805 * fill search info into struct ocfs2_xattr_search.
2806 */
2807static int ocfs2_xattr_block_find(struct inode *inode,
2808 int name_index,
2809 const char *name,
2810 struct ocfs2_xattr_search *xs)
2811{
2812 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2813 struct buffer_head *blk_bh = NULL;
589dc260 2814 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 2815 int ret = 0;
2816
2817 if (!di->i_xattr_loc)
2818 return ret;
2819
4ae1d69b
JB		 2820 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2821 &blk_bh);
cf1d6c76
TY		 2822 if (ret < 0) {
2823 mlog_errno(ret);
2824 return ret;
2825 }
f6087fb7 2826
cf1d6c76 2827 xs->xattr_bh = blk_bh;
4ae1d69b 2828 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
589dc260
TM		 2829
2830 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2831 xs->header = &xb->xb_attrs.xb_header;
2832 xs->base = (void *)xs->header;
2833 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2834 xs->here = xs->header->xh_entries;
2835
2836 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2837 } else
2838 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2839 name_index,
2840 name, xs);
cf1d6c76 2841
cf1d6c76
TY		 2842 if (ret && ret != -ENODATA) {
2843 xs->xattr_bh = NULL;
2844 goto cleanup;
2845 }
2846 xs->not_found = ret;
2847 return 0;
cf1d6c76
TY		 2848cleanup:
2849 brelse(blk_bh);
2850
2851 return ret;
2852}
2853
d3981544 2854static int ocfs2_create_xattr_block(struct inode *inode,
5aea1f0e 2855 struct buffer_head *inode_bh,
d3981544
JB		 2856 struct ocfs2_xattr_set_ctxt *ctxt,
2857 int indexed,
2858 struct buffer_head **ret_bh)
5aea1f0e
TM		 2859{
2860 int ret;
2861 u16 suballoc_bit_start;
2862 u32 num_got;
2b6cb576 2863 u64 suballoc_loc, first_blkno;
5aea1f0e 2864 struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data;
5aea1f0e
TM		 2865 struct buffer_head *new_bh = NULL;
2866 struct ocfs2_xattr_block *xblk;
2867
d3981544
JB		 2868 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
2869 inode_bh, OCFS2_JOURNAL_ACCESS_CREATE);
5aea1f0e
TM		 2870 if (ret < 0) {
2871 mlog_errno(ret);
2872 goto end;
2873 }
2874
1ed9b777 2875 ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1,
2b6cb576
JB		 2876 &suballoc_loc, &suballoc_bit_start,
2877 &num_got, &first_blkno);
5aea1f0e
TM		 2878 if (ret < 0) {
2879 mlog_errno(ret);
2880 goto end;
2881 }
2882
2883 new_bh = sb_getblk(inode->i_sb, first_blkno);
58796207
RX		 2884 if (!new_bh) {
2885 ret = -ENOMEM;
2886 mlog_errno(ret);
2887 goto end;
2888 }
2889
5aea1f0e
TM		 2890 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
2891
d3981544 2892 ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode),
5aea1f0e
TM		 2893 new_bh,
2894 OCFS2_JOURNAL_ACCESS_CREATE);
2895 if (ret < 0) {
2896 mlog_errno(ret);
2897 goto end;
2898 }
2899
2900 /* Initialize ocfs2_xattr_block */
2901 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2902 memset(xblk, 0, inode->i_sb->s_blocksize);
2903 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
d3981544 2904 xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot);
2b6cb576 2905 xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc);
5aea1f0e 2906 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
1ed9b777
JB		 2907 xblk->xb_fs_generation =
2908 cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation);
5aea1f0e 2909 xblk->xb_blkno = cpu_to_le64(first_blkno);
a7fe7a3a
TM		 2910 if (indexed) {
2911 struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root;
2912 xr->xt_clusters = cpu_to_le32(1);
2913 xr->xt_last_eb_blk = 0;
2914 xr->xt_list.l_tree_depth = 0;
2915 xr->xt_list.l_count = cpu_to_le16(
2916 ocfs2_xattr_recs_per_xb(inode->i_sb));
2917 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
2918 xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED);
2919 }
d3981544 2920 ocfs2_journal_dirty(ctxt->handle, new_bh);
a7fe7a3a 2921
d3981544 2922 /* Add it to the inode */
5aea1f0e 2923 di->i_xattr_loc = cpu_to_le64(first_blkno);
d3981544
JB		 2924
2925 spin_lock(&OCFS2_I(inode)->ip_lock);
2926 OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
2927 di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
2928 spin_unlock(&OCFS2_I(inode)->ip_lock);
2929
2930 ocfs2_journal_dirty(ctxt->handle, inode_bh);
5aea1f0e
TM		 2931
2932 *ret_bh = new_bh;
2933 new_bh = NULL;
2934
2935end:
2936 brelse(new_bh);
2937 return ret;
2938}
2939
cf1d6c76
TY		 2940/*
2941 * ocfs2_xattr_block_set()
2942 *
2943 * Set, replace or remove an extended attribute into external block.
2944 *
2945 */
2946static int ocfs2_xattr_block_set(struct inode *inode,
2947 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2948 struct ocfs2_xattr_search *xs,
2949 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76
TY		 2950{
2951 struct buffer_head *new_bh = NULL;
cf1d6c76 2952 struct ocfs2_xattr_block *xblk = NULL;
cf1d6c76 2953 int ret;
d3981544 2954 struct ocfs2_xa_loc loc;
cf1d6c76
TY		 2955
2956 if (!xs->xattr_bh) {
d3981544
JB		 2957 ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt,
2958 0, &new_bh);
5aea1f0e 2959 if (ret) {
cf1d6c76 2960 mlog_errno(ret);
85db90e7 2961 goto end;
cf1d6c76
TY		 2962 }
2963
cf1d6c76 2964 xs->xattr_bh = new_bh;
5aea1f0e 2965 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 2966 xs->header = &xblk->xb_attrs.xb_header;
2967 xs->base = (void *)xs->header;
2968 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2969 xs->here = xs->header->xh_entries;
01225596
TM		 2970 } else
2971 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2972
2973 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
d3981544
JB		 2974 ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh,
2975 xs->not_found ? NULL : xs->here);
01225596 2976
d3981544
JB		 2977 ret = ocfs2_xa_set(&loc, xi, ctxt);
2978 if (!ret)
2979 xs->here = loc.xl_entry;
5f5261ac 2980 else if ((ret != -ENOSPC) || ctxt->set_abort)
01225596 2981 goto end;
d3981544
JB		 2982 else {
2983 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
2984 if (ret)
2985 goto end;
2986 }
cf1d6c76
TY		 2987 }
2988
d3981544
JB		 2989 if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)
2990 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
01225596
TM		 2991
2992end:
cf1d6c76
TY		 2993 return ret;
2994}
2995
78f30c31
TM		 2996/* Check whether the new xattr can be inserted into the inode. */
2997static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
2998 struct ocfs2_xattr_info *xi,
2999 struct ocfs2_xattr_search *xs)
3000{
78f30c31
TM		 3001 struct ocfs2_xattr_entry *last;
3002 int free, i;
3003 size_t min_offs = xs->end - xs->base;
3004
3005 if (!xs->header)
3006 return 0;
3007
3008 last = xs->header->xh_entries;
3009
3010 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
3011 size_t offs = le16_to_cpu(last->xe_name_offset);
3012 if (offs < min_offs)
3013 min_offs = offs;
3014 last += 1;
3015 }
3016
4442f518 3017 free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
78f30c31
TM		 3018 if (free < 0)
3019 return 0;
3020
3021 BUG_ON(!xs->not_found);
3022
199799a3 3023 if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi)))
78f30c31
TM		 3024 return 1;
3025
3026 return 0;
3027}
3028
3029static int ocfs2_calc_xattr_set_need(struct inode *inode,
3030 struct ocfs2_dinode *di,
3031 struct ocfs2_xattr_info *xi,
3032 struct ocfs2_xattr_search *xis,
3033 struct ocfs2_xattr_search *xbs,
3034 int *clusters_need,
85db90e7
TM		 3035 int *meta_need,
3036 int *credits_need)
78f30c31
TM		 3037{
3038 int ret = 0, old_in_xb = 0;
85db90e7 3039 int clusters_add = 0, meta_add = 0, credits = 0;
78f30c31
TM		 3040 struct buffer_head *bh = NULL;
3041 struct ocfs2_xattr_block *xb = NULL;
3042 struct ocfs2_xattr_entry *xe = NULL;
3043 struct ocfs2_xattr_value_root *xv = NULL;
3044 char *base = NULL;
3045 int name_offset, name_len = 0;
3046 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
6b240ff6 3047 xi->xi_value_len);
78f30c31
TM		 3048 u64 value_size;
3049
71d548a6
TM		 3050 /*
3051 * Calculate the clusters we need to write.
3052 * No matter whether we replace an old one or add a new one,
3053 * we need this for writing.
3054 */
6b240ff6 3055 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
71d548a6
TM		 3056 credits += new_clusters *
3057 ocfs2_clusters_to_blocks(inode->i_sb, 1);
3058
78f30c31 3059 if (xis->not_found && xbs->not_found) {
85db90e7
TM		 3060 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3061
6b240ff6 3062 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31 3063 clusters_add += new_clusters;
85db90e7 3064 credits += ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 3065 &def_xv.xv.xr_list);
85db90e7 3066 }
78f30c31
TM		 3067
3068 goto meta_guess;
3069 }
3070
3071 if (!xis->not_found) {
3072 xe = xis->here;
3073 name_offset = le16_to_cpu(xe->xe_name_offset);
3074 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3075 base = xis->base;
85db90e7 3076 credits += OCFS2_INODE_UPDATE_CREDITS;
78f30c31 3077 } else {
970e4936 3078 int i, block_off = 0;
78f30c31
TM		 3079 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
3080 xe = xbs->here;
3081 name_offset = le16_to_cpu(xe->xe_name_offset);
3082 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3083 i = xbs->here - xbs->header->xh_entries;
3084 old_in_xb = 1;
3085
3086 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
fd68a894 3087 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
78f30c31
TM		 3088 bucket_xh(xbs->bucket),
3089 i, &block_off,
3090 &name_offset);
3091 base = bucket_block(xbs->bucket, block_off);
85db90e7
TM		 3092 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3093 } else {
78f30c31 3094 base = xbs->base;
85db90e7
TM		 3095 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
3096 }
3097 }
3098
3099 /*
3100 * delete a xattr doesn't need metadata and cluster allocation.
3101 * so just calculate the credits and return.
3102 *
3103 * The credits for removing the value tree will be extended
3104 * by ocfs2_remove_extent itself.
3105 */
6b240ff6 3106 if (!xi->xi_value) {
85db90e7 3107 if (!ocfs2_xattr_is_local(xe))
a90714c1 3108 credits += ocfs2_remove_extent_credits(inode->i_sb);
85db90e7
TM		 3109
3110 goto out;
78f30c31
TM		 3111 }
3112
3113 /* do cluster allocation guess first. */
3114 value_size = le64_to_cpu(xe->xe_value_size);
3115
3116 if (old_in_xb) {
3117 /*
3118 * In xattr set, we always try to set the xe in inode first,
3119 * so if it can be inserted into inode successfully, the old
3120 * one will be removed from the xattr block, and this xattr
3121 * will be inserted into inode as a new xattr in inode.
3122 */
3123 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
3124 clusters_add += new_clusters;
a90714c1 3125 credits += ocfs2_remove_extent_credits(inode->i_sb) +
85db90e7
TM		 3126 OCFS2_INODE_UPDATE_CREDITS;
3127 if (!ocfs2_xattr_is_local(xe))
3128 credits += ocfs2_calc_extend_credits(
3129 inode->i_sb,
06f9da6e 3130 &def_xv.xv.xr_list);
78f30c31
TM		 3131 goto out;
3132 }
3133 }
3134
6b240ff6 3135 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31
TM		 3136 /* the new values will be stored outside. */
3137 u32 old_clusters = 0;
3138
3139 if (!ocfs2_xattr_is_local(xe)) {
3140 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
3141 value_size);
3142 xv = (struct ocfs2_xattr_value_root *)
3143 (base + name_offset + name_len);
97aff52a 3144 value_size = OCFS2_XATTR_ROOT_SIZE;
78f30c31
TM		 3145 } else
3146 xv = &def_xv.xv;
3147
85db90e7 3148 if (old_clusters >= new_clusters) {
a90714c1 3149 credits += ocfs2_remove_extent_credits(inode->i_sb);
78f30c31 3150 goto out;
85db90e7 3151 } else {
78f30c31
TM		 3152 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
3153 clusters_add += new_clusters - old_clusters;
85db90e7 3154 credits += ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 3155 &xv->xr_list);
97aff52a
TM		 3156 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
3157 goto out;
78f30c31
TM		 3158 }
3159 } else {
3160 /*
3161 * Now the new value will be stored inside. So if the new
3162 * value is smaller than the size of value root or the old
3163 * value, we don't need any allocation, otherwise we have
3164 * to guess metadata allocation.
3165 */
6b240ff6
JB		 3166 if ((ocfs2_xattr_is_local(xe) &&
3167 (value_size >= xi->xi_value_len)) ||
78f30c31 3168 (!ocfs2_xattr_is_local(xe) &&
6b240ff6 3169 OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len))
78f30c31
TM		 3170 goto out;
3171 }
3172
3173meta_guess:
3174 /* calculate metadata allocation. */
3175 if (di->i_xattr_loc) {
3176 if (!xbs->xattr_bh) {
4ae1d69b
JB		 3177 ret = ocfs2_read_xattr_block(inode,
3178 le64_to_cpu(di->i_xattr_loc),
3179 &bh);
78f30c31
TM		 3180 if (ret) {
3181 mlog_errno(ret);
3182 goto out;
3183 }
3184
3185 xb = (struct ocfs2_xattr_block *)bh->b_data;
3186 } else
3187 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
3188
90cb546c
TM		 3189 /*
3190 * If there is already an xattr tree, good, we can calculate
3191 * like other b-trees. Otherwise we may have the chance of
3192 * create a tree, the credit calculation is borrowed from
3193 * ocfs2_calc_extend_credits with root_el = NULL. And the
3194 * new tree will be cluster based, so no meta is needed.
3195 */
78f30c31
TM		 3196 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
3197 struct ocfs2_extent_list *el =
3198 &xb->xb_attrs.xb_root.xt_list;
3199 meta_add += ocfs2_extend_meta_needed(el);
85db90e7 3200 credits += ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 3201 el);
90cb546c
TM		 3202 } else
3203 credits += OCFS2_SUBALLOC_ALLOC + 1;
78f30c31
TM		 3204
3205 /*
3206 * This cluster will be used either for new bucket or for
3207 * new xattr block.
3208 * If the cluster size is the same as the bucket size, one
3209 * more is needed since we may need to extend the bucket
3210 * also.
3211 */
3212 clusters_add += 1;
85db90e7 3213 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 3214 if (OCFS2_XATTR_BUCKET_SIZE ==
85db90e7
TM		 3215 OCFS2_SB(inode->i_sb)->s_clustersize) {
3216 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 3217 clusters_add += 1;
85db90e7
TM		 3218 }
3219 } else {
85db90e7 3220 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
3ed2be71
TS		 3221 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
3222 struct ocfs2_extent_list *el = &def_xv.xv.xr_list;
3223 meta_add += ocfs2_extend_meta_needed(el);
3224 credits += ocfs2_calc_extend_credits(inode->i_sb,
3225 el);
3226 } else {
3227 meta_add += 1;
3228 }
85db90e7 3229 }
78f30c31
TM		 3230out:
3231 if (clusters_need)
3232 *clusters_need = clusters_add;
3233 if (meta_need)
3234 *meta_need = meta_add;
85db90e7
TM		 3235 if (credits_need)
3236 *credits_need = credits;
78f30c31
TM		 3237 brelse(bh);
3238 return ret;
3239}
3240
3241static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
3242 struct ocfs2_dinode *di,
3243 struct ocfs2_xattr_info *xi,
3244 struct ocfs2_xattr_search *xis,
3245 struct ocfs2_xattr_search *xbs,
85db90e7 3246 struct ocfs2_xattr_set_ctxt *ctxt,
492a8a33 3247 int extra_meta,
85db90e7 3248 int *credits)
78f30c31
TM		 3249{
3250 int clusters_add, meta_add, ret;
3251 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3252
3253 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
3254
3255 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
3256
3257 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
85db90e7 3258 &clusters_add, &meta_add, credits);
78f30c31
TM		 3259 if (ret) {
3260 mlog_errno(ret);
3261 return ret;
3262 }
3263
492a8a33 3264 meta_add += extra_meta;
402b4183
TM		 3265 trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add,
3266 clusters_add, *credits);
78f30c31
TM		 3267
3268 if (meta_add) {
3269 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
3270 &ctxt->meta_ac);
3271 if (ret) {
3272 mlog_errno(ret);
3273 goto out;
3274 }
3275 }
3276
3277 if (clusters_add) {
3278 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
3279 if (ret)
3280 mlog_errno(ret);
3281 }
3282out:
3283 if (ret) {
3284 if (ctxt->meta_ac) {
3285 ocfs2_free_alloc_context(ctxt->meta_ac);
3286 ctxt->meta_ac = NULL;
3287 }
3288
3289 /*
3290 * We cannot have an error and a non null ctxt->data_ac.
3291 */
3292 }
3293
3294 return ret;
3295}
3296
85db90e7
TM		 3297static int __ocfs2_xattr_set_handle(struct inode *inode,
3298 struct ocfs2_dinode *di,
3299 struct ocfs2_xattr_info *xi,
3300 struct ocfs2_xattr_search *xis,
3301 struct ocfs2_xattr_search *xbs,
3302 struct ocfs2_xattr_set_ctxt *ctxt)
3303{
9f868f16 3304 int ret = 0, credits, old_found;
85db90e7 3305
6b240ff6 3306 if (!xi->xi_value) {
85db90e7
TM		 3307 /* Remove existing extended attribute */
3308 if (!xis->not_found)
3309 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
3310 else if (!xbs->not_found)
3311 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
3312 } else {
3313 /* We always try to set extended attribute into inode first*/
3314 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
3315 if (!ret && !xbs->not_found) {
3316 /*
3317 * If succeed and that extended attribute existing in
3318 * external block, then we will remove it.
3319 */
6b240ff6
JB		 3320 xi->xi_value = NULL;
3321 xi->xi_value_len = 0;
85db90e7 3322
9f868f16 3323 old_found = xis->not_found;
85db90e7
TM		 3324 xis->not_found = -ENODATA;
3325 ret = ocfs2_calc_xattr_set_need(inode,
3326 di,
3327 xi,
3328 xis,
3329 xbs,
3330 NULL,
3331 NULL,
3332 &credits);
9f868f16 3333 xis->not_found = old_found;
85db90e7
TM		 3334 if (ret) {
3335 mlog_errno(ret);
3336 goto out;
3337 }
3338
c901fb00 3339 ret = ocfs2_extend_trans(ctxt->handle, credits);
85db90e7
TM		 3340 if (ret) {
3341 mlog_errno(ret);
3342 goto out;
3343 }
3344 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
5f5261ac 3345 } else if ((ret == -ENOSPC) && !ctxt->set_abort) {
85db90e7
TM		 3346 if (di->i_xattr_loc && !xbs->xattr_bh) {
3347 ret = ocfs2_xattr_block_find(inode,
6b240ff6
JB		 3348 xi->xi_name_index,
3349 xi->xi_name, xbs);
85db90e7
TM		 3350 if (ret)
3351 goto out;
3352
9f868f16 3353 old_found = xis->not_found;
85db90e7
TM		 3354 xis->not_found = -ENODATA;
3355 ret = ocfs2_calc_xattr_set_need(inode,
3356 di,
3357 xi,
3358 xis,
3359 xbs,
3360 NULL,
3361 NULL,
3362 &credits);
9f868f16 3363 xis->not_found = old_found;
85db90e7
TM		 3364 if (ret) {
3365 mlog_errno(ret);
3366 goto out;
3367 }
3368
c901fb00 3369 ret = ocfs2_extend_trans(ctxt->handle, credits);
85db90e7
TM		 3370 if (ret) {
3371 mlog_errno(ret);
3372 goto out;
3373 }
3374 }
3375 /*
3376 * If no space in inode, we will set extended attribute
3377 * into external block.
3378 */
3379 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
3380 if (ret)
3381 goto out;
3382 if (!xis->not_found) {
3383 /*
3384 * If succeed and that extended attribute
3385 * existing in inode, we will remove it.
3386 */
6b240ff6
JB		 3387 xi->xi_value = NULL;
3388 xi->xi_value_len = 0;
85db90e7
TM		 3389 xbs->not_found = -ENODATA;
3390 ret = ocfs2_calc_xattr_set_need(inode,
3391 di,
3392 xi,
3393 xis,
3394 xbs,
3395 NULL,
3396 NULL,
3397 &credits);
3398 if (ret) {
3399 mlog_errno(ret);
3400 goto out;
3401 }
3402
c901fb00 3403 ret = ocfs2_extend_trans(ctxt->handle, credits);
85db90e7
TM		 3404 if (ret) {
3405 mlog_errno(ret);
3406 goto out;
3407 }
3408 ret = ocfs2_xattr_ibody_set(inode, xi,
3409 xis, ctxt);
3410 }
3411 }
3412 }
3413
4b3f6209
TM		 3414 if (!ret) {
3415 /* Update inode ctime. */
0cf2f763 3416 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
89a907af
TM		 3417 xis->inode_bh,
3418 OCFS2_JOURNAL_ACCESS_WRITE);
4b3f6209
TM		 3419 if (ret) {
3420 mlog_errno(ret);
3421 goto out;
3422 }
3423
6861de97 3424 inode_set_ctime_current(inode);
fd6acbbc
JL		 3425 di->i_ctime = cpu_to_le64(inode_get_ctime_sec(inode));
3426 di->i_ctime_nsec = cpu_to_le32(inode_get_ctime_nsec(inode));
4b3f6209
TM		 3427 ocfs2_journal_dirty(ctxt->handle, xis->inode_bh);
3428 }
85db90e7
TM		 3429out:
3430 return ret;
3431}
3432
6c3faba4
TY		 3433/*
3434 * This function only called duing creating inode
3435 * for init security/acl xattrs of the new inode.
008aafaf 3436 * All transanction credits have been reserved in mknod.
6c3faba4
TY		 3437 */
3438int ocfs2_xattr_set_handle(handle_t *handle,
3439 struct inode *inode,
3440 struct buffer_head *di_bh,
3441 int name_index,
3442 const char *name,
3443 const void *value,
3444 size_t value_len,
3445 int flags,
3446 struct ocfs2_alloc_context *meta_ac,
3447 struct ocfs2_alloc_context *data_ac)
3448{
3449 struct ocfs2_dinode *di;
3450 int ret;
3451
3452 struct ocfs2_xattr_info xi = {
6b240ff6
JB		 3453 .xi_name_index = name_index,
3454 .xi_name = name,
18853b95 3455 .xi_name_len = strlen(name),
6b240ff6
JB		 3456 .xi_value = value,
3457 .xi_value_len = value_len,
6c3faba4
TY		 3458 };
3459
3460 struct ocfs2_xattr_search xis = {
3461 .not_found = -ENODATA,
3462 };
3463
3464 struct ocfs2_xattr_search xbs = {
3465 .not_found = -ENODATA,
3466 };
3467
3468 struct ocfs2_xattr_set_ctxt ctxt = {
3469 .handle = handle,
3470 .meta_ac = meta_ac,
3471 .data_ac = data_ac,
3472 };
3473
3474 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
3475 return -EOPNOTSUPP;
3476
008aafaf
TY		 3477 /*
3478 * In extreme situation, may need xattr bucket when
3479 * block size is too small. And we have already reserved
3480 * the credits for bucket in mknod.
3481 */
3482 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) {
3483 xbs.bucket = ocfs2_xattr_bucket_new(inode);
3484 if (!xbs.bucket) {
3485 mlog_errno(-ENOMEM);
3486 return -ENOMEM;
3487 }
3488 }
3489
6c3faba4
TY		 3490 xis.inode_bh = xbs.inode_bh = di_bh;
3491 di = (struct ocfs2_dinode *)di_bh->b_data;
3492
3493 down_write(&OCFS2_I(inode)->ip_xattr_sem);
3494
3495 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
3496 if (ret)
3497 goto cleanup;
3498 if (xis.not_found) {
3499 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
3500 if (ret)
3501 goto cleanup;
3502 }
3503
3504 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
3505
3506cleanup:
3507 up_write(&OCFS2_I(inode)->ip_xattr_sem);
3508 brelse(xbs.xattr_bh);
008aafaf 3509 ocfs2_xattr_bucket_free(xbs.bucket);
6c3faba4
TY		 3510
3511 return ret;
3512}
3513
cf1d6c76
TY		 3514/*
3515 * ocfs2_xattr_set()
3516 *
3517 * Set, replace or remove an extended attribute for this inode.
3518 * value is NULL to remove an existing extended attribute, else either
3519 * create or replace an extended attribute.
3520 */
3521int ocfs2_xattr_set(struct inode *inode,
3522 int name_index,
3523 const char *name,
3524 const void *value,
3525 size_t value_len,
3526 int flags)
3527{
3528 struct buffer_head *di_bh = NULL;
3529 struct ocfs2_dinode *di;
8818efaa 3530 int ret, credits, had_lock, ref_meta = 0, ref_credits = 0;
78f30c31 3531 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
85db90e7 3532 struct inode *tl_inode = osb->osb_tl_inode;
6ea437a3 3533 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, NULL, };
492a8a33 3534 struct ocfs2_refcount_tree *ref_tree = NULL;
8818efaa 3535 struct ocfs2_lock_holder oh;
cf1d6c76
TY		 3536
3537 struct ocfs2_xattr_info xi = {
6b240ff6
JB		 3538 .xi_name_index = name_index,
3539 .xi_name = name,
18853b95 3540 .xi_name_len = strlen(name),
6b240ff6
JB		 3541 .xi_value = value,
3542 .xi_value_len = value_len,
cf1d6c76
TY		 3543 };
3544
3545 struct ocfs2_xattr_search xis = {
3546 .not_found = -ENODATA,
3547 };
3548
3549 struct ocfs2_xattr_search xbs = {
3550 .not_found = -ENODATA,
3551 };
3552
1119d3c0 3553 if (!ocfs2_supports_xattr(osb))
8154da3d
TY		 3554 return -EOPNOTSUPP;
3555
ba937127
JB		 3556 /*
3557 * Only xbs will be used on indexed trees. xis doesn't need a
3558 * bucket.
3559 */
3560 xbs.bucket = ocfs2_xattr_bucket_new(inode);
3561 if (!xbs.bucket) {
3562 mlog_errno(-ENOMEM);
3563 return -ENOMEM;
3564 }
3565
8818efaa
ER		 3566 had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 1, &oh);
3567 if (had_lock < 0) {
3568 ret = had_lock;
cf1d6c76 3569 mlog_errno(ret);
ba937127 3570 goto cleanup_nolock;
cf1d6c76
TY		 3571 }
3572 xis.inode_bh = xbs.inode_bh = di_bh;
3573 di = (struct ocfs2_dinode *)di_bh->b_data;
3574
3575 down_write(&OCFS2_I(inode)->ip_xattr_sem);
3576 /*
3577 * Scan inode and external block to find the same name
25985edc 3578 * extended attribute and collect search information.
cf1d6c76
TY		 3579 */
3580 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
3581 if (ret)
3582 goto cleanup;
3583 if (xis.not_found) {
3584 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
3585 if (ret)
3586 goto cleanup;
3587 }
3588
3589 if (xis.not_found && xbs.not_found) {
3590 ret = -ENODATA;
3591 if (flags & XATTR_REPLACE)
3592 goto cleanup;
3593 ret = 0;
3594 if (!value)
3595 goto cleanup;
3596 } else {
3597 ret = -EEXIST;
3598 if (flags & XATTR_CREATE)
3599 goto cleanup;
3600 }
3601
25985edc 3602 /* Check whether the value is refcounted and do some preparation. */
84e40080 3603 if (ocfs2_is_refcount_inode(inode) &&
492a8a33
TM		 3604 (!xis.not_found || !xbs.not_found)) {
3605 ret = ocfs2_prepare_refcount_xattr(inode, di, &xi,
3606 &xis, &xbs, &ref_tree,
3607 &ref_meta, &ref_credits);
3608 if (ret) {
3609 mlog_errno(ret);
3610 goto cleanup;
3611 }
3612 }
85db90e7 3613
5955102c 3614 inode_lock(tl_inode);
85db90e7
TM		 3615
3616 if (ocfs2_truncate_log_needs_flush(osb)) {
3617 ret = __ocfs2_flush_truncate_log(osb);
3618 if (ret < 0) {
5955102c 3619 inode_unlock(tl_inode);
85db90e7
TM		 3620 mlog_errno(ret);
3621 goto cleanup;
3622 }
3623 }
5955102c 3624 inode_unlock(tl_inode);
85db90e7
TM		 3625
3626 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
492a8a33 3627 &xbs, &ctxt, ref_meta, &credits);
78f30c31
TM		 3628 if (ret) {
3629 mlog_errno(ret);
3630 goto cleanup;
3631 }
3632
4b3f6209
TM		 3633 /* we need to update inode's ctime field, so add credit for it. */
3634 credits += OCFS2_INODE_UPDATE_CREDITS;
492a8a33 3635 ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits);
85db90e7
TM		 3636 if (IS_ERR(ctxt.handle)) {
3637 ret = PTR_ERR(ctxt.handle);
3638 mlog_errno(ret);
6ea437a3 3639 goto out_free_ac;
cf1d6c76 3640 }
85db90e7
TM		 3641
3642 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
6fdb702d 3643 ocfs2_update_inode_fsync_trans(ctxt.handle, inode, 0);
85db90e7
TM		 3644
3645 ocfs2_commit_trans(osb, ctxt.handle);
3646
6ea437a3 3647out_free_ac:
78f30c31
TM		 3648 if (ctxt.data_ac)
3649 ocfs2_free_alloc_context(ctxt.data_ac);
3650 if (ctxt.meta_ac)
3651 ocfs2_free_alloc_context(ctxt.meta_ac);
3652 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
3653 ocfs2_schedule_truncate_log_flush(osb, 1);
3654 ocfs2_run_deallocs(osb, &ctxt.dealloc);
8b2c0dba 3655
cf1d6c76 3656cleanup:
492a8a33
TM		 3657 if (ref_tree)
3658 ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
cf1d6c76 3659 up_write(&OCFS2_I(inode)->ip_xattr_sem);
8b2c0dba
TM		 3660 if (!value && !ret) {
3661 ret = ocfs2_try_remove_refcount_tree(inode, di_bh);
3662 if (ret)
3663 mlog_errno(ret);
3664 }
8818efaa 3665 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
ba937127 3666cleanup_nolock:
cf1d6c76
TY		 3667 brelse(di_bh);
3668 brelse(xbs.xattr_bh);
ba937127 3669 ocfs2_xattr_bucket_free(xbs.bucket);
cf1d6c76
TY		 3670
3671 return ret;
3672}
3673
0c044f0b
TM		 3674/*
3675 * Find the xattr extent rec which may contains name_hash.
3676 * e_cpos will be the first name hash of the xattr rec.
3677 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
3678 */
3679static int ocfs2_xattr_get_rec(struct inode *inode,
3680 u32 name_hash,
3681 u64 *p_blkno,
3682 u32 *e_cpos,
3683 u32 *num_clusters,
3684 struct ocfs2_extent_list *el)
3685{
3686 int ret = 0, i;
3687 struct buffer_head *eb_bh = NULL;
3688 struct ocfs2_extent_block *eb;
3689 struct ocfs2_extent_rec *rec = NULL;
3690 u64 e_blkno = 0;
3691
3692 if (el->l_tree_depth) {
facdb77f
JB		 3693 ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash,
3694 &eb_bh);
0c044f0b
TM		 3695 if (ret) {
3696 mlog_errno(ret);
3697 goto out;
3698 }
3699
3700 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
3701 el = &eb->h_list;
3702
3703 if (el->l_tree_depth) {
17a5b9ab 3704 ret = ocfs2_error(inode->i_sb,
7ecef14a
JP		 3705 "Inode %lu has non zero tree depth in xattr tree block %llu\n",
3706 inode->i_ino,
3707 (unsigned long long)eb_bh->b_blocknr);
0c044f0b
TM		 3708 goto out;
3709 }
3710 }
3711
3712 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
3713 rec = &el->l_recs[i];
3714
3715 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
3716 e_blkno = le64_to_cpu(rec->e_blkno);
3717 break;
3718 }
3719 }
3720
3721 if (!e_blkno) {
7ecef14a
JP		 3722 ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in xattr\n",
3723 inode->i_ino,
3724 le32_to_cpu(rec->e_cpos),
3725 ocfs2_rec_clusters(el, rec));
0c044f0b
TM		 3726 goto out;
3727 }
3728
3729 *p_blkno = le64_to_cpu(rec->e_blkno);
3730 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
3731 if (e_cpos)
3732 *e_cpos = le32_to_cpu(rec->e_cpos);
3733out:
3734 brelse(eb_bh);
3735 return ret;
3736}
3737
3738typedef int (xattr_bucket_func)(struct inode *inode,
3739 struct ocfs2_xattr_bucket *bucket,
3740 void *para);
3741
589dc260 3742static int ocfs2_find_xe_in_bucket(struct inode *inode,
e2356a3f 3743 struct ocfs2_xattr_bucket *bucket,
589dc260
TM		 3744 int name_index,
3745 const char *name,
3746 u32 name_hash,
3747 u16 *xe_index,
3748 int *found)
3749{
3750 int i, ret = 0, cmp = 1, block_off, new_offset;
e2356a3f 3751 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
589dc260
TM		 3752 size_t name_len = strlen(name);
3753 struct ocfs2_xattr_entry *xe = NULL;
589dc260
TM		 3754 char *xe_name;
3755
3756 /*
3757 * We don't use binary search in the bucket because there
3758 * may be multiple entries with the same name hash.
3759 */
3760 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3761 xe = &xh->xh_entries[i];
3762
3763 if (name_hash > le32_to_cpu(xe->xe_name_hash))
3764 continue;
3765 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
3766 break;
3767
3768 cmp = name_index - ocfs2_xattr_get_type(xe);
3769 if (!cmp)
3770 cmp = name_len - xe->xe_name_len;
3771 if (cmp)
3772 continue;
3773
fd68a894 3774 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
589dc260
TM		 3775 xh,
3776 i,
3777 &block_off,
3778 &new_offset);
3779 if (ret) {
3780 mlog_errno(ret);
3781 break;
3782 }
3783
970e4936 3784
e2356a3f
JB		 3785 xe_name = bucket_block(bucket, block_off) + new_offset;
3786 if (!memcmp(name, xe_name, name_len)) {
589dc260
TM		 3787 *xe_index = i;
3788 *found = 1;
3789 ret = 0;
3790 break;
3791 }
3792 }
3793
3794 return ret;
3795}
3796
3797/*
3798 * Find the specified xattr entry in a series of buckets.
3799 * This series start from p_blkno and last for num_clusters.
3800 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
3801 * the num of the valid buckets.
3802 *
3803 * Return the buffer_head this xattr should reside in. And if the xattr's
3804 * hash is in the gap of 2 buckets, return the lower bucket.
3805 */
3806static int ocfs2_xattr_bucket_find(struct inode *inode,
3807 int name_index,
3808 const char *name,
3809 u32 name_hash,
3810 u64 p_blkno,
3811 u32 first_hash,
3812 u32 num_clusters,
3813 struct ocfs2_xattr_search *xs)
3814{
3815 int ret, found = 0;
589dc260
TM		 3816 struct ocfs2_xattr_header *xh = NULL;
3817 struct ocfs2_xattr_entry *xe = NULL;
3818 u16 index = 0;
3819 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3820 int low_bucket = 0, bucket, high_bucket;
e2356a3f 3821 struct ocfs2_xattr_bucket *search;
e2356a3f 3822 u64 blkno, lower_blkno = 0;
589dc260 3823
e2356a3f
JB		 3824 search = ocfs2_xattr_bucket_new(inode);
3825 if (!search) {
3826 ret = -ENOMEM;
3827 mlog_errno(ret);
3828 goto out;
3829 }
3830
3831 ret = ocfs2_read_xattr_bucket(search, p_blkno);
589dc260
TM		 3832 if (ret) {
3833 mlog_errno(ret);
3834 goto out;
3835 }
3836
e2356a3f 3837 xh = bucket_xh(search);
589dc260 3838 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
589dc260 3839 while (low_bucket <= high_bucket) {
e2356a3f 3840 ocfs2_xattr_bucket_relse(search);
589dc260 3841
e2356a3f 3842 bucket = (low_bucket + high_bucket) / 2;
589dc260 3843 blkno = p_blkno + bucket * blk_per_bucket;
e2356a3f 3844 ret = ocfs2_read_xattr_bucket(search, blkno);
589dc260
TM		 3845 if (ret) {
3846 mlog_errno(ret);
3847 goto out;
3848 }
3849
e2356a3f 3850 xh = bucket_xh(search);
589dc260
TM		 3851 xe = &xh->xh_entries[0];
3852 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
3853 high_bucket = bucket - 1;
3854 continue;
3855 }
3856
3857 /*
3858 * Check whether the hash of the last entry in our
5a095611
TM		 3859 * bucket is larger than the search one. for an empty
3860 * bucket, the last one is also the first one.
589dc260 3861 */
5a095611
TM		 3862 if (xh->xh_count)
3863 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
3864
e2356a3f
JB		 3865 /* record lower_blkno which may be the insert place. */
3866 lower_blkno = blkno;
589dc260
TM		 3867
3868 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
3869 low_bucket = bucket + 1;
3870 continue;
3871 }
3872
3873 /* the searched xattr should reside in this bucket if exists. */
e2356a3f 3874 ret = ocfs2_find_xe_in_bucket(inode, search,
589dc260
TM		 3875 name_index, name, name_hash,
3876 &index, &found);
3877 if (ret) {
3878 mlog_errno(ret);
3879 goto out;
3880 }
3881 break;
3882 }
3883
3884 /*
3885 * Record the bucket we have found.
3886 * When the xattr's hash value is in the gap of 2 buckets, we will
3887 * always set it to the previous bucket.
3888 */
e2356a3f
JB		 3889 if (!lower_blkno)
3890 lower_blkno = p_blkno;
3891
3892 /* This should be in cache - we just read it during the search */
3893 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3894 if (ret) {
3895 mlog_errno(ret);
3896 goto out;
589dc260 3897 }
589dc260 3898
ba937127
JB		 3899 xs->header = bucket_xh(xs->bucket);
3900 xs->base = bucket_block(xs->bucket, 0);
589dc260
TM		 3901 xs->end = xs->base + inode->i_sb->s_blocksize;
3902
3903 if (found) {
589dc260 3904 xs->here = &xs->header->xh_entries[index];
402b4183
TM		 3905 trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno,
3906 name, name_index, name_hash,
3907 (unsigned long long)bucket_blkno(xs->bucket),
3908 index);
589dc260
TM		 3909 } else
3910 ret = -ENODATA;
3911
3912out:
e2356a3f 3913 ocfs2_xattr_bucket_free(search);
589dc260
TM		 3914 return ret;
3915}
3916
3917static int ocfs2_xattr_index_block_find(struct inode *inode,
3918 struct buffer_head *root_bh,
3919 int name_index,
3920 const char *name,
3921 struct ocfs2_xattr_search *xs)
3922{
3923 int ret;
3924 struct ocfs2_xattr_block *xb =
3925 (struct ocfs2_xattr_block *)root_bh->b_data;
3926 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3927 struct ocfs2_extent_list *el = &xb_root->xt_list;
3928 u64 p_blkno = 0;
3929 u32 first_hash, num_clusters = 0;
2057e5c6 3930 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
589dc260
TM		 3931
3932 if (le16_to_cpu(el->l_next_free_rec) == 0)
3933 return -ENODATA;
3934
402b4183
TM		 3935 trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno,
3936 name, name_index, name_hash,
3937 (unsigned long long)root_bh->b_blocknr,
3938 -1);
589dc260
TM		 3939
3940 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3941 &num_clusters, el);
3942 if (ret) {
3943 mlog_errno(ret);
3944 goto out;
3945 }
3946
3947 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3948
402b4183
TM		 3949 trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno,
3950 name, name_index, first_hash,
3951 (unsigned long long)p_blkno,
3952 num_clusters);
589dc260
TM		 3953
3954 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3955 p_blkno, first_hash, num_clusters, xs);
3956
3957out:
3958 return ret;
3959}
3960
0c044f0b
TM		 3961static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3962 u64 blkno,
3963 u32 clusters,
3964 xattr_bucket_func *func,
3965 void *para)
3966{
6dde41d9 3967 int i, ret = 0;
0c044f0b
TM		 3968 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3969 u32 num_buckets = clusters * bpc;
ba937127 3970 struct ocfs2_xattr_bucket *bucket;
0c044f0b 3971
ba937127
JB		 3972 bucket = ocfs2_xattr_bucket_new(inode);
3973 if (!bucket) {
3974 mlog_errno(-ENOMEM);
3975 return -ENOMEM;
3976 }
0c044f0b 3977
402b4183
TM		 3978 trace_ocfs2_iterate_xattr_buckets(
3979 (unsigned long long)OCFS2_I(inode)->ip_blkno,
3980 (unsigned long long)blkno, clusters);
0c044f0b 3981
ba937127
JB		 3982 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3983 ret = ocfs2_read_xattr_bucket(bucket, blkno);
0c044f0b
TM		 3984 if (ret) {
3985 mlog_errno(ret);
ba937127 3986 break;
0c044f0b
TM		 3987 }
3988
0c044f0b
TM		 3989 /*
3990 * The real bucket num in this series of blocks is stored
3991 * in the 1st bucket.
3992 */
3993 if (i == 0)
ba937127 3994 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
0c044f0b 3995
402b4183 3996 trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno,
ba937127 3997 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
0c044f0b 3998 if (func) {
ba937127 3999 ret = func(inode, bucket, para);
a46fa684 4000 if (ret && ret != -ERANGE)
0c044f0b 4001 mlog_errno(ret);
ba937127 4002 /* Fall through to bucket_relse() */
0c044f0b
TM		 4003 }
4004
ba937127
JB		 4005 ocfs2_xattr_bucket_relse(bucket);
4006 if (ret)
4007 break;
0c044f0b
TM		 4008 }
4009
ba937127 4010 ocfs2_xattr_bucket_free(bucket);
0c044f0b
TM		 4011 return ret;
4012}
4013
4014struct ocfs2_xattr_tree_list {
4015 char *buffer;
4016 size_t buffer_size;
936b8834 4017 size_t result;
0c044f0b
TM		 4018};
4019
fd68a894 4020static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
0c044f0b
TM		 4021 struct ocfs2_xattr_header *xh,
4022 int index,
4023 int *block_off,
4024 int *new_offset)
4025{
4026 u16 name_offset;
4027
4028 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
4029 return -EINVAL;
4030
4031 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
4032
fd68a894
TM		 4033 *block_off = name_offset >> sb->s_blocksize_bits;
4034 *new_offset = name_offset % sb->s_blocksize;
0c044f0b
TM		 4035
4036 return 0;
4037}
4038
4039static int ocfs2_list_xattr_bucket(struct inode *inode,
4040 struct ocfs2_xattr_bucket *bucket,
4041 void *para)
4042{
936b8834 4043 int ret = 0, type;
0c044f0b 4044 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
0c044f0b 4045 int i, block_off, new_offset;
1046cb11 4046 const char *name;
0c044f0b 4047
3e632946
JB		 4048 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
4049 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
936b8834 4050 type = ocfs2_xattr_get_type(entry);
0c044f0b 4051
1046cb11
AG		 4052 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
4053 bucket_xh(bucket),
4054 i,
4055 &block_off,
4056 &new_offset);
4057 if (ret)
4058 break;
936b8834 4059
1046cb11
AG		 4060 name = (const char *)bucket_block(bucket, block_off) +
4061 new_offset;
4062 ret = ocfs2_xattr_list_entry(inode->i_sb,
4063 xl->buffer,
4064 xl->buffer_size,
4065 &xl->result,
4066 type, name,
4067 entry->xe_name_len);
4068 if (ret)
4069 break;
0c044f0b
TM		 4070 }
4071
4072 return ret;
4073}
4074
47bca495
TM		 4075static int ocfs2_iterate_xattr_index_block(struct inode *inode,
4076 struct buffer_head *blk_bh,
4077 xattr_tree_rec_func *rec_func,
4078 void *para)
0c044f0b 4079{
47bca495
TM		 4080 struct ocfs2_xattr_block *xb =
4081 (struct ocfs2_xattr_block *)blk_bh->b_data;
4082 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
0c044f0b
TM		 4083 int ret = 0;
4084 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
4085 u64 p_blkno = 0;
0c044f0b 4086
47bca495 4087 if (!el->l_next_free_rec || !rec_func)
0c044f0b
TM		 4088 return 0;
4089
4090 while (name_hash > 0) {
4091 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
4092 &e_cpos, &num_clusters, el);
4093 if (ret) {
4094 mlog_errno(ret);
47bca495 4095 break;
0c044f0b
TM		 4096 }
4097
47bca495
TM		 4098 ret = rec_func(inode, blk_bh, p_blkno, e_cpos,
4099 num_clusters, para);
0c044f0b 4100 if (ret) {
a46fa684
TM		 4101 if (ret != -ERANGE)
4102 mlog_errno(ret);
47bca495 4103 break;
0c044f0b
TM		 4104 }
4105
4106 if (e_cpos == 0)
4107 break;
4108
4109 name_hash = e_cpos - 1;
4110 }
4111
47bca495
TM		 4112 return ret;
4113
4114}
4115
4116static int ocfs2_list_xattr_tree_rec(struct inode *inode,
4117 struct buffer_head *root_bh,
4118 u64 blkno, u32 cpos, u32 len, void *para)
4119{
4120 return ocfs2_iterate_xattr_buckets(inode, blkno, len,
4121 ocfs2_list_xattr_bucket, para);
4122}
4123
4124static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
4125 struct buffer_head *blk_bh,
4126 char *buffer,
4127 size_t buffer_size)
4128{
4129 int ret;
4130 struct ocfs2_xattr_tree_list xl = {
4131 .buffer = buffer,
4132 .buffer_size = buffer_size,
4133 .result = 0,
4134 };
4135
4136 ret = ocfs2_iterate_xattr_index_block(inode, blk_bh,
4137 ocfs2_list_xattr_tree_rec, &xl);
4138 if (ret) {
4139 mlog_errno(ret);
4140 goto out;
4141 }
4142
936b8834 4143 ret = xl.result;
0c044f0b
TM		 4144out:
4145 return ret;
4146}
01225596
TM		 4147
4148static int cmp_xe(const void *a, const void *b)
4149{
4150 const struct ocfs2_xattr_entry *l = a, *r = b;
4151 u32 l_hash = le32_to_cpu(l->xe_name_hash);
4152 u32 r_hash = le32_to_cpu(r->xe_name_hash);
4153
4154 if (l_hash > r_hash)
4155 return 1;
4156 if (l_hash < r_hash)
4157 return -1;
4158 return 0;
4159}
4160
4161static void swap_xe(void *a, void *b, int size)
4162{
4163 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
4164
4165 tmp = *l;
4166 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
4167 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
4168}
4169
4170/*
4171 * When the ocfs2_xattr_block is filled up, new bucket will be created
4172 * and all the xattr entries will be moved to the new bucket.
178eeac3
JB		 4173 * The header goes at the start of the bucket, and the names+values are
4174 * filled from the end. This is why *target starts as the last buffer.
01225596
TM		 4175 * Note: we need to sort the entries since they are not saved in order
4176 * in the ocfs2_xattr_block.
4177 */
4178static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
4179 struct buffer_head *xb_bh,
178eeac3 4180 struct ocfs2_xattr_bucket *bucket)
01225596
TM		 4181{
4182 int i, blocksize = inode->i_sb->s_blocksize;
178eeac3 4183 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596
TM		 4184 u16 offset, size, off_change;
4185 struct ocfs2_xattr_entry *xe;
4186 struct ocfs2_xattr_block *xb =
4187 (struct ocfs2_xattr_block *)xb_bh->b_data;
4188 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
178eeac3 4189 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 4190 u16 count = le16_to_cpu(xb_xh->xh_count);
178eeac3
JB		 4191 char *src = xb_bh->b_data;
4192 char *target = bucket_block(bucket, blks - 1);
01225596 4193
402b4183
TM		 4194 trace_ocfs2_cp_xattr_block_to_bucket_begin(
4195 (unsigned long long)xb_bh->b_blocknr,
4196 (unsigned long long)bucket_blkno(bucket));
178eeac3
JB		 4197
4198 for (i = 0; i < blks; i++)
4199 memset(bucket_block(bucket, i), 0, blocksize);
01225596 4200
01225596
TM		 4201 /*
4202 * Since the xe_name_offset is based on ocfs2_xattr_header,
4203 * there is a offset change corresponding to the change of
4204 * ocfs2_xattr_header's position.
4205 */
4206 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
4207 xe = &xb_xh->xh_entries[count - 1];
4208 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
4209 size = blocksize - offset;
4210
4211 /* copy all the names and values. */
01225596
TM		 4212 memcpy(target + offset, src + offset, size);
4213
4214 /* Init new header now. */
4215 xh->xh_count = xb_xh->xh_count;
4216 xh->xh_num_buckets = cpu_to_le16(1);
4217 xh->xh_name_value_len = cpu_to_le16(size);
4218 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
4219
4220 /* copy all the entries. */
178eeac3 4221 target = bucket_block(bucket, 0);
01225596
TM		 4222 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
4223 size = count * sizeof(struct ocfs2_xattr_entry);
4224 memcpy(target + offset, (char *)xb_xh + offset, size);
4225
4226 /* Change the xe offset for all the xe because of the move. */
4227 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
4228 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
4229 for (i = 0; i < count; i++)
4230 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
4231
402b4183 4232 trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
01225596
TM		 4233
4234 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
4235 cmp_xe, swap_xe);
4236}
4237
4238/*
4239 * After we move xattr from block to index btree, we have to
4240 * update ocfs2_xattr_search to the new xe and base.
4241 *
4242 * When the entry is in xattr block, xattr_bh indicates the storage place.
4243 * While if the entry is in index b-tree, "bucket" indicates the
4244 * real place of the xattr.
4245 */
178eeac3
JB		 4246static void ocfs2_xattr_update_xattr_search(struct inode *inode,
4247 struct ocfs2_xattr_search *xs,
4248 struct buffer_head *old_bh)
01225596 4249{
01225596
TM		 4250 char *buf = old_bh->b_data;
4251 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
4252 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
178eeac3 4253 int i;
01225596 4254
ba937127 4255 xs->header = bucket_xh(xs->bucket);
178eeac3 4256 xs->base = bucket_block(xs->bucket, 0);
01225596
TM		 4257 xs->end = xs->base + inode->i_sb->s_blocksize;
4258
178eeac3
JB		 4259 if (xs->not_found)
4260 return;
01225596 4261
178eeac3
JB		 4262 i = xs->here - old_xh->xh_entries;
4263 xs->here = &xs->header->xh_entries[i];
01225596
TM		 4264}
4265
4266static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 4267 struct ocfs2_xattr_search *xs,
4268 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4269{
85db90e7 4270 int ret;
01225596
TM		 4271 u32 bit_off, len;
4272 u64 blkno;
85db90e7 4273 handle_t *handle = ctxt->handle;
01225596 4274 struct ocfs2_inode_info *oi = OCFS2_I(inode);
01225596
TM		 4275 struct buffer_head *xb_bh = xs->xattr_bh;
4276 struct ocfs2_xattr_block *xb =
4277 (struct ocfs2_xattr_block *)xb_bh->b_data;
4278 struct ocfs2_xattr_tree_root *xr;
4279 u16 xb_flags = le16_to_cpu(xb->xb_flags);
01225596 4280
402b4183
TM		 4281 trace_ocfs2_xattr_create_index_block_begin(
4282 (unsigned long long)xb_bh->b_blocknr);
01225596
TM		 4283
4284 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
178eeac3 4285 BUG_ON(!xs->bucket);
01225596 4286
01225596
TM		 4287 /*
4288 * XXX:
4289 * We can use this lock for now, and maybe move to a dedicated mutex
4290 * if performance becomes a problem later.
4291 */
4292 down_write(&oi->ip_alloc_sem);
4293
0cf2f763 4294 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh,
84008972 4295 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4296 if (ret) {
4297 mlog_errno(ret);
85db90e7 4298 goto out;
01225596
TM		 4299 }
4300
1ed9b777 4301 ret = __ocfs2_claim_clusters(handle, ctxt->data_ac,
78f30c31 4302 1, 1, &bit_off, &len);
01225596
TM		 4303 if (ret) {
4304 mlog_errno(ret);
85db90e7 4305 goto out;
01225596
TM		 4306 }
4307
4308 /*
4309 * The bucket may spread in many blocks, and
4310 * we will only touch the 1st block and the last block
4311 * in the whole bucket(one for entry and one for data).
4312 */
4313 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
4314
402b4183 4315 trace_ocfs2_xattr_create_index_block((unsigned long long)blkno);
01225596 4316
9c339255 4317 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno, 1);
178eeac3 4318 if (ret) {
01225596 4319 mlog_errno(ret);
85db90e7 4320 goto out;
01225596
TM		 4321 }
4322
178eeac3
JB		 4323 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4324 OCFS2_JOURNAL_ACCESS_CREATE);
01225596
TM		 4325 if (ret) {
4326 mlog_errno(ret);
85db90e7 4327 goto out;
01225596
TM		 4328 }
4329
178eeac3
JB		 4330 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
4331 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 4332
178eeac3 4333 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
01225596
TM		 4334
4335 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
4336 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
4337 offsetof(struct ocfs2_xattr_block, xb_attrs));
4338
4339 xr = &xb->xb_attrs.xb_root;
4340 xr->xt_clusters = cpu_to_le32(1);
4341 xr->xt_last_eb_blk = 0;
4342 xr->xt_list.l_tree_depth = 0;
4343 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
4344 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
4345
4346 xr->xt_list.l_recs[0].e_cpos = 0;
4347 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
4348 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
4349
4350 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
4351
85db90e7 4352 ocfs2_journal_dirty(handle, xb_bh);
01225596 4353
85db90e7 4354out:
01225596
TM		 4355 up_write(&oi->ip_alloc_sem);
4356
01225596
TM		 4357 return ret;
4358}
4359
4360static int cmp_xe_offset(const void *a, const void *b)
4361{
4362 const struct ocfs2_xattr_entry *l = a, *r = b;
4363 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
4364 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
4365
4366 if (l_name_offset < r_name_offset)
4367 return 1;
4368 if (l_name_offset > r_name_offset)
4369 return -1;
4370 return 0;
4371}
4372
4373/*
4374 * defrag a xattr bucket if we find that the bucket has some
4375 * holes beteen name/value pairs.
4376 * We will move all the name/value pairs to the end of the bucket
4377 * so that we can spare some space for insertion.
4378 */
4379static int ocfs2_defrag_xattr_bucket(struct inode *inode,
85db90e7 4380 handle_t *handle,
01225596
TM		 4381 struct ocfs2_xattr_bucket *bucket)
4382{
4383 int ret, i;
199799a3 4384 size_t end, offset, len;
01225596
TM		 4385 struct ocfs2_xattr_header *xh;
4386 char *entries, *buf, *bucket_buf = NULL;
9c7759aa 4387 u64 blkno = bucket_blkno(bucket);
01225596 4388 u16 xh_free_start;
01225596 4389 size_t blocksize = inode->i_sb->s_blocksize;
01225596 4390 struct ocfs2_xattr_entry *xe;
01225596
TM		 4391
4392 /*
4393 * In order to make the operation more efficient and generic,
4394 * we copy all the blocks into a contiguous memory and do the
4395 * defragment there, so if anything is error, we will not touch
4396 * the real block.
4397 */
4398 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
4399 if (!bucket_buf) {
4400 ret = -EIO;
4401 goto out;
4402 }
4403
4404 buf = bucket_buf;
1c32a2fd
TM		 4405 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
4406 memcpy(buf, bucket_block(bucket, i), blocksize);
01225596 4407
1c32a2fd 4408 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
161d6f30
JB		 4409 OCFS2_JOURNAL_ACCESS_WRITE);
4410 if (ret < 0) {
4411 mlog_errno(ret);
85db90e7 4412 goto out;
01225596
TM		 4413 }
4414
4415 xh = (struct ocfs2_xattr_header *)bucket_buf;
4416 entries = (char *)xh->xh_entries;
4417 xh_free_start = le16_to_cpu(xh->xh_free_start);
4418
402b4183 4419 trace_ocfs2_defrag_xattr_bucket(
de29c085
MF		 4420 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
4421 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
01225596
TM		 4422
4423 /*
4424 * sort all the entries by their offset.
4425 * the largest will be the first, so that we can
4426 * move them to the end one by one.
4427 */
4428 sort(entries, le16_to_cpu(xh->xh_count),
4429 sizeof(struct ocfs2_xattr_entry),
4430 cmp_xe_offset, swap_xe);
4431
4432 /* Move all name/values to the end of the bucket. */
4433 xe = xh->xh_entries;
4434 end = OCFS2_XATTR_BUCKET_SIZE;
4435 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
4436 offset = le16_to_cpu(xe->xe_name_offset);
199799a3 4437 len = namevalue_size_xe(xe);
01225596
TM		 4438
4439 /*
4440 * We must make sure that the name/value pair
4441 * exist in the same block. So adjust end to
4442 * the previous block end if needed.
4443 */
4444 if (((end - len) / blocksize !=
4445 (end - 1) / blocksize))
4446 end = end - end % blocksize;
4447
4448 if (end > offset + len) {
4449 memmove(bucket_buf + end - len,
4450 bucket_buf + offset, len);
4451 xe->xe_name_offset = cpu_to_le16(end - len);
4452 }
4453
4454 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
4455 "bucket %llu\n", (unsigned long long)blkno);
4456
4457 end -= len;
4458 }
4459
4460 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
4461 "bucket %llu\n", (unsigned long long)blkno);
4462
4463 if (xh_free_start == end)
85db90e7 4464 goto out;
01225596
TM		 4465
4466 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
4467 xh->xh_free_start = cpu_to_le16(end);
4468
4469 /* sort the entries by their name_hash. */
4470 sort(entries, le16_to_cpu(xh->xh_count),
4471 sizeof(struct ocfs2_xattr_entry),
4472 cmp_xe, swap_xe);
4473
4474 buf = bucket_buf;
1c32a2fd
TM		 4475 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
4476 memcpy(bucket_block(bucket, i), buf, blocksize);
4477 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
01225596 4478
01225596 4479out:
01225596
TM		 4480 kfree(bucket_buf);
4481 return ret;
4482}
4483
4484/*
b5c03e74
JB		 4485 * prev_blkno points to the start of an existing extent. new_blkno
4486 * points to a newly allocated extent. Because we know each of our
4487 * clusters contains more than bucket, we can easily split one cluster
4488 * at a bucket boundary. So we take the last cluster of the existing
4489 * extent and split it down the middle. We move the last half of the
4490 * buckets in the last cluster of the existing extent over to the new
4491 * extent.
01225596 4492 *
b5c03e74
JB		 4493 * first_bh is the buffer at prev_blkno so we can update the existing
4494 * extent's bucket count. header_bh is the bucket were we were hoping
4495 * to insert our xattr. If the bucket move places the target in the new
4496 * extent, we'll update first_bh and header_bh after modifying the old
4497 * extent.
4498 *
4499 * first_hash will be set as the 1st xe's name_hash in the new extent.
01225596
TM		 4500 */
4501static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
4502 handle_t *handle,
41cb8148
JB		 4503 struct ocfs2_xattr_bucket *first,
4504 struct ocfs2_xattr_bucket *target,
01225596 4505 u64 new_blkno,
01225596
TM		 4506 u32 num_clusters,
4507 u32 *first_hash)
4508{
c58b6032 4509 int ret;
41cb8148
JB		 4510 struct super_block *sb = inode->i_sb;
4511 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
4512 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
b5c03e74 4513 int to_move = num_buckets / 2;
c58b6032 4514 u64 src_blkno;
41cb8148
JB		 4515 u64 last_cluster_blkno = bucket_blkno(first) +
4516 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
01225596 4517
41cb8148
JB		 4518 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
4519 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
01225596 4520
402b4183
TM		 4521 trace_ocfs2_mv_xattr_bucket_cross_cluster(
4522 (unsigned long long)last_cluster_blkno,
4523 (unsigned long long)new_blkno);
01225596 4524
41cb8148 4525 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
c58b6032
JB		 4526 last_cluster_blkno, new_blkno,
4527 to_move, first_hash);
01225596
TM		 4528 if (ret) {
4529 mlog_errno(ret);
4530 goto out;
4531 }
4532
c58b6032
JB		 4533 /* This is the first bucket that got moved */
4534 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
01225596 4535
b5c03e74 4536 /*
c58b6032 4537 * If the target bucket was part of the moved buckets, we need to
41cb8148 4538 * update first and target.
b5c03e74 4539 */
41cb8148 4540 if (bucket_blkno(target) >= src_blkno) {
b5c03e74
JB		 4541 /* Find the block for the new target bucket */
4542 src_blkno = new_blkno +
41cb8148
JB		 4543 (bucket_blkno(target) - src_blkno);
4544
4545 ocfs2_xattr_bucket_relse(first);
4546 ocfs2_xattr_bucket_relse(target);
01225596 4547
b5c03e74 4548 /*
c58b6032 4549 * These shouldn't fail - the buffers are in the
b5c03e74
JB		 4550 * journal from ocfs2_cp_xattr_bucket().
4551 */
41cb8148 4552 ret = ocfs2_read_xattr_bucket(first, new_blkno);
c58b6032
JB		 4553 if (ret) {
4554 mlog_errno(ret);
4555 goto out;
4556 }
41cb8148
JB		 4557 ret = ocfs2_read_xattr_bucket(target, src_blkno);
4558 if (ret)
b5c03e74 4559 mlog_errno(ret);
01225596 4560
01225596
TM		 4561 }
4562
01225596 4563out:
01225596
TM		 4564 return ret;
4565}
4566
01225596 4567/*
80bcaf34
TM		 4568 * Find the suitable pos when we divide a bucket into 2.
4569 * We have to make sure the xattrs with the same hash value exist
4570 * in the same bucket.
4571 *
4572 * If this ocfs2_xattr_header covers more than one hash value, find a
4573 * place where the hash value changes. Try to find the most even split.
4574 * The most common case is that all entries have different hash values,
4575 * and the first check we make will find a place to split.
4576 */
4577static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
4578{
4579 struct ocfs2_xattr_entry *entries = xh->xh_entries;
4580 int count = le16_to_cpu(xh->xh_count);
4581 int delta, middle = count / 2;
4582
4583 /*
4584 * We start at the middle. Each step gets farther away in both
4585 * directions. We therefore hit the change in hash value
4586 * nearest to the middle. Note that this loop does not execute for
4587 * count < 2.
4588 */
4589 for (delta = 0; delta < middle; delta++) {
4590 /* Let's check delta earlier than middle */
4591 if (cmp_xe(&entries[middle - delta - 1],
4592 &entries[middle - delta]))
4593 return middle - delta;
4594
4595 /* For even counts, don't walk off the end */
4596 if ((middle + delta + 1) == count)
4597 continue;
4598
4599 /* Now try delta past middle */
4600 if (cmp_xe(&entries[middle + delta],
4601 &entries[middle + delta + 1]))
4602 return middle + delta + 1;
4603 }
4604
4605 /* Every entry had the same hash */
4606 return count;
4607}
4608
4609/*
4610 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
01225596 4611 * first_hash will record the 1st hash of the new bucket.
80bcaf34
TM		 4612 *
4613 * Normally half of the xattrs will be moved. But we have to make
4614 * sure that the xattrs with the same hash value are stored in the
4615 * same bucket. If all the xattrs in this bucket have the same hash
4616 * value, the new bucket will be initialized as an empty one and the
4617 * first_hash will be initialized as (hash_value+1).
01225596 4618 */
80bcaf34
TM		 4619static int ocfs2_divide_xattr_bucket(struct inode *inode,
4620 handle_t *handle,
4621 u64 blk,
4622 u64 new_blk,
4623 u32 *first_hash,
4624 int new_bucket_head)
01225596
TM		 4625{
4626 int ret, i;
199799a3 4627 int count, start, len, name_value_len = 0, name_offset = 0;
ba937127 4628 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 4629 struct ocfs2_xattr_header *xh;
4630 struct ocfs2_xattr_entry *xe;
4631 int blocksize = inode->i_sb->s_blocksize;
4632
402b4183
TM		 4633 trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk,
4634 (unsigned long long)new_blk);
01225596 4635
ba937127
JB		 4636 s_bucket = ocfs2_xattr_bucket_new(inode);
4637 t_bucket = ocfs2_xattr_bucket_new(inode);
4638 if (!s_bucket || !t_bucket) {
4639 ret = -ENOMEM;
4640 mlog_errno(ret);
4641 goto out;
4642 }
01225596 4643
ba937127 4644 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
01225596
TM		 4645 if (ret) {
4646 mlog_errno(ret);
4647 goto out;
4648 }
4649
ba937127 4650 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
1224be02 4651 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4652 if (ret) {
4653 mlog_errno(ret);
4654 goto out;
4655 }
4656
784b816a
JB		 4657 /*
4658 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
4659 * there's no need to read it.
4660 */
9c339255 4661 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk, new_bucket_head);
01225596
TM		 4662 if (ret) {
4663 mlog_errno(ret);
4664 goto out;
4665 }
4666
2b656c1d
JB		 4667 /*
4668 * Hey, if we're overwriting t_bucket, what difference does
4669 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
4670 * same part of ocfs2_cp_xattr_bucket().
4671 */
ba937127 4672 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 4673 new_bucket_head ?
4674 OCFS2_JOURNAL_ACCESS_CREATE :
4675 OCFS2_JOURNAL_ACCESS_WRITE);
4676 if (ret) {
4677 mlog_errno(ret);
4678 goto out;
01225596
TM		 4679 }
4680
ba937127 4681 xh = bucket_xh(s_bucket);
80bcaf34
TM		 4682 count = le16_to_cpu(xh->xh_count);
4683 start = ocfs2_xattr_find_divide_pos(xh);
4684
4685 if (start == count) {
4686 xe = &xh->xh_entries[start-1];
4687
4688 /*
4689 * initialized a new empty bucket here.
4690 * The hash value is set as one larger than
4691 * that of the last entry in the previous bucket.
4692 */
ba937127
JB		 4693 for (i = 0; i < t_bucket->bu_blocks; i++)
4694 memset(bucket_block(t_bucket, i), 0, blocksize);
80bcaf34 4695
ba937127 4696 xh = bucket_xh(t_bucket);
80bcaf34
TM		 4697 xh->xh_free_start = cpu_to_le16(blocksize);
4698 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
4699 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
4700
4701 goto set_num_buckets;
4702 }
4703
01225596 4704 /* copy the whole bucket to the new first. */
ba937127 4705 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
01225596
TM		 4706
4707 /* update the new bucket. */
ba937127 4708 xh = bucket_xh(t_bucket);
01225596
TM		 4709
4710 /*
4711 * Calculate the total name/value len and xh_free_start for
4712 * the old bucket first.
4713 */
4714 name_offset = OCFS2_XATTR_BUCKET_SIZE;
4715 name_value_len = 0;
4716 for (i = 0; i < start; i++) {
4717 xe = &xh->xh_entries[i];
199799a3 4718 name_value_len += namevalue_size_xe(xe);
01225596
TM		 4719 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
4720 name_offset = le16_to_cpu(xe->xe_name_offset);
4721 }
4722
4723 /*
4724 * Now begin the modification to the new bucket.
4725 *
4726 * In the new bucket, We just move the xattr entry to the beginning
4727 * and don't touch the name/value. So there will be some holes in the
4728 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
4729 * called.
4730 */
4731 xe = &xh->xh_entries[start];
4732 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
402b4183
TM		 4733 trace_ocfs2_divide_xattr_bucket_move(len,
4734 (int)((char *)xe - (char *)xh),
4735 (int)((char *)xh->xh_entries - (char *)xh));
01225596
TM		 4736 memmove((char *)xh->xh_entries, (char *)xe, len);
4737 xe = &xh->xh_entries[count - start];
4738 len = sizeof(struct ocfs2_xattr_entry) * start;
4739 memset((char *)xe, 0, len);
4740
4741 le16_add_cpu(&xh->xh_count, -start);
4742 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
4743
4744 /* Calculate xh_free_start for the new bucket. */
4745 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4746 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
4747 xe = &xh->xh_entries[i];
01225596
TM		 4748 if (le16_to_cpu(xe->xe_name_offset) <
4749 le16_to_cpu(xh->xh_free_start))
4750 xh->xh_free_start = xe->xe_name_offset;
4751 }
4752
80bcaf34 4753set_num_buckets:
01225596
TM		 4754 /* set xh->xh_num_buckets for the new xh. */
4755 if (new_bucket_head)
4756 xh->xh_num_buckets = cpu_to_le16(1);
4757 else
4758 xh->xh_num_buckets = 0;
4759
ba937127 4760 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 4761
4762 /* store the first_hash of the new bucket. */
4763 if (first_hash)
4764 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
4765
4766 /*
80bcaf34
TM		 4767 * Now only update the 1st block of the old bucket. If we
4768 * just added a new empty bucket, there is no need to modify
4769 * it.
01225596 4770 */
80bcaf34
TM		 4771 if (start == count)
4772 goto out;
4773
ba937127 4774 xh = bucket_xh(s_bucket);
01225596
TM		 4775 memset(&xh->xh_entries[start], 0,
4776 sizeof(struct ocfs2_xattr_entry) * (count - start));
4777 xh->xh_count = cpu_to_le16(start);
4778 xh->xh_free_start = cpu_to_le16(name_offset);
4779 xh->xh_name_value_len = cpu_to_le16(name_value_len);
4780
ba937127 4781 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
01225596
TM		 4782
4783out:
ba937127
JB		 4784 ocfs2_xattr_bucket_free(s_bucket);
4785 ocfs2_xattr_bucket_free(t_bucket);
01225596
TM		 4786
4787 return ret;
4788}
4789
4790/*
4791 * Copy xattr from one bucket to another bucket.
4792 *
4793 * The caller must make sure that the journal transaction
4794 * has enough space for journaling.
4795 */
4796static int ocfs2_cp_xattr_bucket(struct inode *inode,
4797 handle_t *handle,
4798 u64 s_blkno,
4799 u64 t_blkno,
4800 int t_is_new)
4801{
4980c6da 4802 int ret;
ba937127 4803 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 4804
4805 BUG_ON(s_blkno == t_blkno);
4806
402b4183
TM		 4807 trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno,
4808 (unsigned long long)t_blkno,
4809 t_is_new);
01225596 4810
ba937127
JB		 4811 s_bucket = ocfs2_xattr_bucket_new(inode);
4812 t_bucket = ocfs2_xattr_bucket_new(inode);
4813 if (!s_bucket || !t_bucket) {
4814 ret = -ENOMEM;
4815 mlog_errno(ret);
4816 goto out;
4817 }
92de109a 4818
ba937127 4819 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
01225596
TM		 4820 if (ret)
4821 goto out;
4822
784b816a
JB		 4823 /*
4824 * Even if !t_is_new, we're overwriting t_bucket. Thus,
4825 * there's no need to read it.
4826 */
9c339255 4827 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno, t_is_new);
01225596
TM		 4828 if (ret)
4829 goto out;
4830
2b656c1d
JB		 4831 /*
4832 * Hey, if we're overwriting t_bucket, what difference does
4833 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
874d65af
JB		 4834 * cluster to fill, we came here from
4835 * ocfs2_mv_xattr_buckets(), and it is really new -
4836 * ACCESS_CREATE is required. But we also might have moved data
4837 * out of t_bucket before extending back into it.
4838 * ocfs2_add_new_xattr_bucket() can do this - its call to
4839 * ocfs2_add_new_xattr_cluster() may have created a new extent
2b656c1d
JB		 4840 * and copied out the end of the old extent. Then it re-extends
4841 * the old extent back to create space for new xattrs. That's
4842 * how we get here, and the bucket isn't really new.
4843 */
ba937127 4844 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 4845 t_is_new ?
4846 OCFS2_JOURNAL_ACCESS_CREATE :
4847 OCFS2_JOURNAL_ACCESS_WRITE);
4848 if (ret)
4849 goto out;
01225596 4850
ba937127
JB		 4851 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
4852 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 4853
4854out:
ba937127
JB		 4855 ocfs2_xattr_bucket_free(t_bucket);
4856 ocfs2_xattr_bucket_free(s_bucket);
01225596
TM		 4857
4858 return ret;
4859}
4860
4861/*
874d65af
JB		 4862 * src_blk points to the start of an existing extent. last_blk points to
4863 * last cluster in that extent. to_blk points to a newly allocated
54ecb6b6
JB		 4864 * extent. We copy the buckets from the cluster at last_blk to the new
4865 * extent. If start_bucket is non-zero, we skip that many buckets before
4866 * we start copying. The new extent's xh_num_buckets gets set to the
4867 * number of buckets we copied. The old extent's xh_num_buckets shrinks
4868 * by the same amount.
01225596 4869 */
54ecb6b6
JB		 4870static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
4871 u64 src_blk, u64 last_blk, u64 to_blk,
4872 unsigned int start_bucket,
4873 u32 *first_hash)
01225596
TM		 4874{
4875 int i, ret, credits;
4876 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
15d60929 4877 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596 4878 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
15d60929 4879 struct ocfs2_xattr_bucket *old_first, *new_first;
01225596 4880
402b4183
TM		 4881 trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk,
4882 (unsigned long long)to_blk);
01225596 4883
54ecb6b6
JB		 4884 BUG_ON(start_bucket >= num_buckets);
4885 if (start_bucket) {
4886 num_buckets -= start_bucket;
4887 last_blk += (start_bucket * blks_per_bucket);
4888 }
4889
15d60929
JB		 4890 /* The first bucket of the original extent */
4891 old_first = ocfs2_xattr_bucket_new(inode);
4892 /* The first bucket of the new extent */
4893 new_first = ocfs2_xattr_bucket_new(inode);
4894 if (!old_first || !new_first) {
4895 ret = -ENOMEM;
4896 mlog_errno(ret);
4897 goto out;
4898 }
4899
874d65af 4900 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
15d60929
JB		 4901 if (ret) {
4902 mlog_errno(ret);
4903 goto out;
4904 }
4905
01225596 4906 /*
54ecb6b6
JB		 4907 * We need to update the first bucket of the old extent and all
4908 * the buckets going to the new extent.
01225596 4909 */
c901fb00 4910 credits = ((num_buckets + 1) * blks_per_bucket);
01225596
TM		 4911 ret = ocfs2_extend_trans(handle, credits);
4912 if (ret) {
4913 mlog_errno(ret);
4914 goto out;
4915 }
4916
15d60929
JB		 4917 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4918 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4919 if (ret) {
4920 mlog_errno(ret);
4921 goto out;
4922 }
4923
4924 for (i = 0; i < num_buckets; i++) {
4925 ret = ocfs2_cp_xattr_bucket(inode, handle,
874d65af 4926 last_blk + (i * blks_per_bucket),
15d60929
JB		 4927 to_blk + (i * blks_per_bucket),
4928 1);
01225596
TM		 4929 if (ret) {
4930 mlog_errno(ret);
4931 goto out;
4932 }
01225596
TM		 4933 }
4934
15d60929
JB		 4935 /*
4936 * Get the new bucket ready before we dirty anything
4937 * (This actually shouldn't fail, because we already dirtied
4938 * it once in ocfs2_cp_xattr_bucket()).
4939 */
4940 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4941 if (ret) {
01225596
TM		 4942 mlog_errno(ret);
4943 goto out;
4944 }
15d60929
JB		 4945 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4946 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4947 if (ret) {
4948 mlog_errno(ret);
4949 goto out;
4950 }
4951
15d60929
JB		 4952 /* Now update the headers */
4953 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4954 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
01225596 4955
15d60929
JB		 4956 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4957 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
01225596
TM		 4958
4959 if (first_hash)
15d60929
JB		 4960 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4961
01225596 4962out:
15d60929
JB		 4963 ocfs2_xattr_bucket_free(new_first);
4964 ocfs2_xattr_bucket_free(old_first);
01225596
TM		 4965 return ret;
4966}
4967
4968/*
80bcaf34 4969 * Move some xattrs in this cluster to the new cluster.
01225596
TM		 4970 * This function should only be called when bucket size == cluster size.
4971 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4972 */
80bcaf34
TM		 4973static int ocfs2_divide_xattr_cluster(struct inode *inode,
4974 handle_t *handle,
4975 u64 prev_blk,
4976 u64 new_blk,
4977 u32 *first_hash)
01225596
TM		 4978{
4979 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
c901fb00 4980 int ret, credits = 2 * blk_per_bucket;
01225596
TM		 4981
4982 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4983
4984 ret = ocfs2_extend_trans(handle, credits);
4985 if (ret) {
4986 mlog_errno(ret);
4987 return ret;
4988 }
4989
4990 /* Move half of the xattr in start_blk to the next bucket. */
80bcaf34
TM		 4991 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4992 new_blk, first_hash, 1);
01225596
TM		 4993}
4994
4995/*
4996 * Move some xattrs from the old cluster to the new one since they are not
4997 * contiguous in ocfs2 xattr tree.
4998 *
4999 * new_blk starts a new separate cluster, and we will move some xattrs from
5000 * prev_blk to it. v_start will be set as the first name hash value in this
5001 * new cluster so that it can be used as e_cpos during tree insertion and
5002 * don't collide with our original b-tree operations. first_bh and header_bh
5003 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
5004 * to extend the insert bucket.
5005 *
5006 * The problem is how much xattr should we move to the new one and when should
5007 * we update first_bh and header_bh?
5008 * 1. If cluster size > bucket size, that means the previous cluster has more
5009 * than 1 bucket, so just move half nums of bucket into the new cluster and
5010 * update the first_bh and header_bh if the insert bucket has been moved
5011 * to the new cluster.
5012 * 2. If cluster_size == bucket_size:
5013 * a) If the previous extent rec has more than one cluster and the insert
5014 * place isn't in the last cluster, copy the entire last cluster to the
5015 * new one. This time, we don't need to upate the first_bh and header_bh
5016 * since they will not be moved into the new cluster.
5017 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
5018 * the new one. And we set the extend flag to zero if the insert place is
5019 * moved into the new allocated cluster since no extend is needed.
5020 */
5021static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
5022 handle_t *handle,
012ee910
JB		 5023 struct ocfs2_xattr_bucket *first,
5024 struct ocfs2_xattr_bucket *target,
01225596 5025 u64 new_blk,
01225596
TM		 5026 u32 prev_clusters,
5027 u32 *v_start,
5028 int *extend)
5029{
92cf3adf 5030 int ret;
01225596 5031
402b4183
TM		 5032 trace_ocfs2_adjust_xattr_cross_cluster(
5033 (unsigned long long)bucket_blkno(first),
5034 (unsigned long long)new_blk, prev_clusters);
01225596 5035
41cb8148 5036 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
01225596
TM		 5037 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
5038 handle,
41cb8148 5039 first, target,
01225596 5040 new_blk,
01225596
TM		 5041 prev_clusters,
5042 v_start);
012ee910 5043 if (ret)
41cb8148 5044 mlog_errno(ret);
41cb8148 5045 } else {
92cf3adf
JB		 5046 /* The start of the last cluster in the first extent */
5047 u64 last_blk = bucket_blkno(first) +
5048 ((prev_clusters - 1) *
5049 ocfs2_clusters_to_blocks(inode->i_sb, 1));
01225596 5050
012ee910 5051 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
874d65af 5052 ret = ocfs2_mv_xattr_buckets(inode, handle,
92cf3adf 5053 bucket_blkno(first),
54ecb6b6 5054 last_blk, new_blk, 0,
01225596 5055 v_start);
012ee910
JB		 5056 if (ret)
5057 mlog_errno(ret);
5058 } else {
80bcaf34
TM		 5059 ret = ocfs2_divide_xattr_cluster(inode, handle,
5060 last_blk, new_blk,
5061 v_start);
012ee910
JB		 5062 if (ret)
5063 mlog_errno(ret);
01225596 5064
92cf3adf 5065 if ((bucket_blkno(target) == last_blk) && extend)
01225596
TM		 5066 *extend = 0;
5067 }
5068 }
5069
5070 return ret;
5071}
5072
5073/*
5074 * Add a new cluster for xattr storage.
5075 *
5076 * If the new cluster is contiguous with the previous one, it will be
5077 * appended to the same extent record, and num_clusters will be updated.
5078 * If not, we will insert a new extent for it and move some xattrs in
5079 * the last cluster into the new allocated one.
5080 * We also need to limit the maximum size of a btree leaf, otherwise we'll
5081 * lose the benefits of hashing because we'll have to search large leaves.
5082 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
5083 * if it's bigger).
5084 *
5085 * first_bh is the first block of the previous extent rec and header_bh
5086 * indicates the bucket we will insert the new xattrs. They will be updated
5087 * when the header_bh is moved into the new cluster.
5088 */
5089static int ocfs2_add_new_xattr_cluster(struct inode *inode,
5090 struct buffer_head *root_bh,
ed29c0ca
JB		 5091 struct ocfs2_xattr_bucket *first,
5092 struct ocfs2_xattr_bucket *target,
01225596
TM		 5093 u32 *num_clusters,
5094 u32 prev_cpos,
78f30c31
TM		 5095 int *extend,
5096 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 5097{
85db90e7 5098 int ret;
01225596
TM		 5099 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
5100 u32 prev_clusters = *num_clusters;
5101 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
5102 u64 block;
85db90e7 5103 handle_t *handle = ctxt->handle;
01225596 5104 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
f99b9b7c 5105 struct ocfs2_extent_tree et;
01225596 5106
402b4183
TM		 5107 trace_ocfs2_add_new_xattr_cluster_begin(
5108 (unsigned long long)OCFS2_I(inode)->ip_blkno,
5109 (unsigned long long)bucket_blkno(first),
5110 prev_cpos, prev_clusters);
01225596 5111
5e404e9e 5112 ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh);
f99b9b7c 5113
0cf2f763 5114 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
84008972 5115 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 5116 if (ret < 0) {
5117 mlog_errno(ret);
5118 goto leave;
5119 }
5120
1ed9b777 5121 ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1,
01225596
TM		 5122 clusters_to_add, &bit_off, &num_bits);
5123 if (ret < 0) {
5124 if (ret != -ENOSPC)
5125 mlog_errno(ret);
5126 goto leave;
5127 }
5128
5129 BUG_ON(num_bits > clusters_to_add);
5130
5131 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
402b4183 5132 trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits);
01225596 5133
ed29c0ca 5134 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
01225596
TM		 5135 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
5136 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
5137 /*
5138 * If this cluster is contiguous with the old one and
5139 * adding this new cluster, we don't surpass the limit of
5140 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
5141 * initialized and used like other buckets in the previous
5142 * cluster.
5143 * So add it as a contiguous one. The caller will handle
5144 * its init process.
5145 */
5146 v_start = prev_cpos + prev_clusters;
5147 *num_clusters = prev_clusters + num_bits;
01225596
TM		 5148 } else {
5149 ret = ocfs2_adjust_xattr_cross_cluster(inode,
5150 handle,
012ee910
JB		 5151 first,
5152 target,
01225596 5153 block,
01225596
TM		 5154 prev_clusters,
5155 &v_start,
5156 extend);
5157 if (ret) {
5158 mlog_errno(ret);
5159 goto leave;
5160 }
5161 }
5162
402b4183
TM		 5163 trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block,
5164 v_start, num_bits);
cc79d8c1 5165 ret = ocfs2_insert_extent(handle, &et, v_start, block,
78f30c31 5166 num_bits, 0, ctxt->meta_ac);
01225596
TM		 5167 if (ret < 0) {
5168 mlog_errno(ret);
5169 goto leave;
5170 }
5171
ec20cec7 5172 ocfs2_journal_dirty(handle, root_bh);
01225596
TM		 5173
5174leave:
01225596
TM		 5175 return ret;
5176}
5177
5178/*
92de109a
JB		 5179 * We are given an extent. 'first' is the bucket at the very front of
5180 * the extent. The extent has space for an additional bucket past
5181 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
5182 * of the target bucket. We wish to shift every bucket past the target
5183 * down one, filling in that additional space. When we get back to the
5184 * target, we split the target between itself and the now-empty bucket
5185 * at target+1 (aka, target_blkno + blks_per_bucket).
01225596
TM		 5186 */
5187static int ocfs2_extend_xattr_bucket(struct inode *inode,
85db90e7 5188 handle_t *handle,
92de109a
JB		 5189 struct ocfs2_xattr_bucket *first,
5190 u64 target_blk,
01225596
TM		 5191 u32 num_clusters)
5192{
5193 int ret, credits;
5194 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5195 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
92de109a
JB		 5196 u64 end_blk;
5197 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
01225596 5198
402b4183
TM		 5199 trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk,
5200 (unsigned long long)bucket_blkno(first),
5201 num_clusters, new_bucket);
01225596 5202
92de109a
JB		 5203 /* The extent must have room for an additional bucket */
5204 BUG_ON(new_bucket >=
5205 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
01225596 5206
92de109a
JB		 5207 /* end_blk points to the last existing bucket */
5208 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
01225596
TM		 5209
5210 /*
92de109a
JB		 5211 * end_blk is the start of the last existing bucket.
5212 * Thus, (end_blk - target_blk) covers the target bucket and
5213 * every bucket after it up to, but not including, the last
5214 * existing bucket. Then we add the last existing bucket, the
5215 * new bucket, and the first bucket (3 * blk_per_bucket).
01225596 5216 */
c901fb00 5217 credits = (end_blk - target_blk) + (3 * blk_per_bucket);
85db90e7
TM		 5218 ret = ocfs2_extend_trans(handle, credits);
5219 if (ret) {
01225596
TM		 5220 mlog_errno(ret);
5221 goto out;
5222 }
5223
92de109a
JB		 5224 ret = ocfs2_xattr_bucket_journal_access(handle, first,
5225 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 5226 if (ret) {
5227 mlog_errno(ret);
85db90e7 5228 goto out;
01225596
TM		 5229 }
5230
92de109a 5231 while (end_blk != target_blk) {
01225596
TM		 5232 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
5233 end_blk + blk_per_bucket, 0);
5234 if (ret)
85db90e7 5235 goto out;
01225596
TM		 5236 end_blk -= blk_per_bucket;
5237 }
5238
92de109a
JB		 5239 /* Move half of the xattr in target_blkno to the next bucket. */
5240 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
5241 target_blk + blk_per_bucket, NULL, 0);
01225596 5242
92de109a
JB		 5243 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
5244 ocfs2_xattr_bucket_journal_dirty(handle, first);
01225596 5245
01225596
TM		 5246out:
5247 return ret;
5248}
5249
5250/*
91f2033f
JB		 5251 * Add new xattr bucket in an extent record and adjust the buckets
5252 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
5253 * bucket we want to insert into.
01225596 5254 *
91f2033f
JB		 5255 * In the easy case, we will move all the buckets after target down by
5256 * one. Half of target's xattrs will be moved to the next bucket.
5257 *
5258 * If current cluster is full, we'll allocate a new one. This may not
5259 * be contiguous. The underlying calls will make sure that there is
5260 * space for the insert, shifting buckets around if necessary.
5261 * 'target' may be moved by those calls.
01225596
TM		 5262 */
5263static int ocfs2_add_new_xattr_bucket(struct inode *inode,
5264 struct buffer_head *xb_bh,
91f2033f 5265 struct ocfs2_xattr_bucket *target,
78f30c31 5266 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 5267{
01225596
TM		 5268 struct ocfs2_xattr_block *xb =
5269 (struct ocfs2_xattr_block *)xb_bh->b_data;
5270 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
5271 struct ocfs2_extent_list *el = &xb_root->xt_list;
91f2033f
JB		 5272 u32 name_hash =
5273 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
ed29c0ca 5274 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
01225596
TM		 5275 int ret, num_buckets, extend = 1;
5276 u64 p_blkno;
5277 u32 e_cpos, num_clusters;
92de109a 5278 /* The bucket at the front of the extent */
91f2033f 5279 struct ocfs2_xattr_bucket *first;
01225596 5280
402b4183
TM		 5281 trace_ocfs2_add_new_xattr_bucket(
5282 (unsigned long long)bucket_blkno(target));
01225596 5283
ed29c0ca 5284 /* The first bucket of the original extent */
92de109a 5285 first = ocfs2_xattr_bucket_new(inode);
91f2033f 5286 if (!first) {
92de109a
JB		 5287 ret = -ENOMEM;
5288 mlog_errno(ret);
5289 goto out;
5290 }
5291
01225596
TM		 5292 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
5293 &num_clusters, el);
5294 if (ret) {
5295 mlog_errno(ret);
5296 goto out;
5297 }
5298
ed29c0ca 5299 ret = ocfs2_read_xattr_bucket(first, p_blkno);
01225596
TM		 5300 if (ret) {
5301 mlog_errno(ret);
5302 goto out;
5303 }
5304
ed29c0ca
JB		 5305 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
5306 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
5307 /*
5308 * This can move first+target if the target bucket moves
5309 * to the new extent.
5310 */
01225596
TM		 5311 ret = ocfs2_add_new_xattr_cluster(inode,
5312 xb_bh,
ed29c0ca
JB		 5313 first,
5314 target,
01225596
TM		 5315 &num_clusters,
5316 e_cpos,
78f30c31
TM		 5317 &extend,
5318 ctxt);
01225596
TM		 5319 if (ret) {
5320 mlog_errno(ret);
5321 goto out;
5322 }
5323 }
5324
92de109a 5325 if (extend) {
01225596 5326 ret = ocfs2_extend_xattr_bucket(inode,
85db90e7 5327 ctxt->handle,
ed29c0ca
JB		 5328 first,
5329 bucket_blkno(target),
01225596 5330 num_clusters);
92de109a
JB		 5331 if (ret)
5332 mlog_errno(ret);
5333 }
5334
01225596 5335out:
92de109a 5336 ocfs2_xattr_bucket_free(first);
ed29c0ca 5337
01225596
TM		 5338 return ret;
5339}
5340
01225596
TM		 5341/*
5342 * Truncate the specified xe_off entry in xattr bucket.
5343 * bucket is indicated by header_bh and len is the new length.
5344 * Both the ocfs2_xattr_value_root and the entry will be updated here.
5345 *
5346 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
5347 */
5348static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
548b0f22 5349 struct ocfs2_xattr_bucket *bucket,
01225596 5350 int xe_off,
78f30c31
TM		 5351 int len,
5352 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 5353{
5354 int ret, offset;
5355 u64 value_blk;
01225596 5356 struct ocfs2_xattr_entry *xe;
548b0f22 5357 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 5358 size_t blocksize = inode->i_sb->s_blocksize;
b3e5d379
JB		 5359 struct ocfs2_xattr_value_buf vb = {
5360 .vb_access = ocfs2_journal_access,
5361 };
01225596
TM		 5362
5363 xe = &xh->xh_entries[xe_off];
5364
5365 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
5366
5367 offset = le16_to_cpu(xe->xe_name_offset) +
5368 OCFS2_XATTR_SIZE(xe->xe_name_len);
5369
5370 value_blk = offset / blocksize;
5371
5372 /* We don't allow ocfs2_xattr_value to be stored in different block. */
5373 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
01225596 5374
b3e5d379
JB		 5375 vb.vb_bh = bucket->bu_bhs[value_blk];
5376 BUG_ON(!vb.vb_bh);
01225596 5377
b3e5d379
JB		 5378 vb.vb_xv = (struct ocfs2_xattr_value_root *)
5379 (vb.vb_bh->b_data + offset % blocksize);
01225596 5380
548b0f22
JB		 5381 /*
5382 * From here on out we have to dirty the bucket. The generic
5383 * value calls only modify one of the bucket's bhs, but we need
5384 * to send the bucket at once. So if they error, they *could* have
5385 * modified something. We have to assume they did, and dirty
5386 * the whole bucket. This leaves us in a consistent state.
5387 */
402b4183
TM		 5388 trace_ocfs2_xattr_bucket_value_truncate(
5389 (unsigned long long)bucket_blkno(bucket), xe_off, len);
b3e5d379 5390 ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
01225596
TM		 5391 if (ret) {
5392 mlog_errno(ret);
554e7f9e
TM		 5393 goto out;
5394 }
5395
5396 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
5397 OCFS2_JOURNAL_ACCESS_WRITE);
5398 if (ret) {
5399 mlog_errno(ret);
5400 goto out;
01225596
TM		 5401 }
5402
548b0f22
JB		 5403 xe->xe_value_size = cpu_to_le64(len);
5404
548b0f22
JB		 5405 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
5406
01225596 5407out:
01225596
TM		 5408 return ret;
5409}
5410
01225596
TM		 5411static int ocfs2_rm_xattr_cluster(struct inode *inode,
5412 struct buffer_head *root_bh,
5413 u64 blkno,
5414 u32 cpos,
47bca495
TM		 5415 u32 len,
5416 void *para)
01225596
TM		 5417{
5418 int ret;
5419 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5420 struct inode *tl_inode = osb->osb_tl_inode;
5421 handle_t *handle;
5422 struct ocfs2_xattr_block *xb =
5423 (struct ocfs2_xattr_block *)root_bh->b_data;
01225596
TM		 5424 struct ocfs2_alloc_context *meta_ac = NULL;
5425 struct ocfs2_cached_dealloc_ctxt dealloc;
f99b9b7c
JB		 5426 struct ocfs2_extent_tree et;
5427
47bca495 5428 ret = ocfs2_iterate_xattr_buckets(inode, blkno, len,
ce9c5a54 5429 ocfs2_delete_xattr_in_bucket, para);
47bca495
TM		 5430 if (ret) {
5431 mlog_errno(ret);
5432 return ret;
5433 }
5434
5e404e9e 5435 ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh);
01225596
TM		 5436
5437 ocfs2_init_dealloc_ctxt(&dealloc);
5438
402b4183
TM		 5439 trace_ocfs2_rm_xattr_cluster(
5440 (unsigned long long)OCFS2_I(inode)->ip_blkno,
5441 (unsigned long long)blkno, cpos, len);
01225596 5442
8cb471e8
JB		 5443 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno,
5444 len);
01225596 5445
f99b9b7c 5446 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
01225596
TM		 5447 if (ret) {
5448 mlog_errno(ret);
5449 return ret;
5450 }
5451
5955102c 5452 inode_lock(tl_inode);
01225596
TM		 5453
5454 if (ocfs2_truncate_log_needs_flush(osb)) {
5455 ret = __ocfs2_flush_truncate_log(osb);
5456 if (ret < 0) {
5457 mlog_errno(ret);
5458 goto out;
5459 }
5460 }
5461
a90714c1 5462 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
d3264799 5463 if (IS_ERR(handle)) {
01225596
TM		 5464 ret = -ENOMEM;
5465 mlog_errno(ret);
5466 goto out;
5467 }
5468
0cf2f763 5469 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
84008972 5470 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 5471 if (ret) {
5472 mlog_errno(ret);
5473 goto out_commit;
5474 }
5475
dbdcf6a4 5476 ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac,
f99b9b7c 5477 &dealloc);
01225596
TM		 5478 if (ret) {
5479 mlog_errno(ret);
5480 goto out_commit;
5481 }
5482
5483 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
ec20cec7 5484 ocfs2_journal_dirty(handle, root_bh);
01225596
TM		 5485
5486 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
5487 if (ret)
5488 mlog_errno(ret);
6fdb702d 5489 ocfs2_update_inode_fsync_trans(handle, inode, 0);
01225596
TM		 5490
5491out_commit:
5492 ocfs2_commit_trans(osb, handle);
5493out:
5494 ocfs2_schedule_truncate_log_flush(osb, 1);
5495
5955102c 5496 inode_unlock(tl_inode);
01225596
TM		 5497
5498 if (meta_ac)
5499 ocfs2_free_alloc_context(meta_ac);
5500
5501 ocfs2_run_deallocs(osb, &dealloc);
5502
5503 return ret;
5504}
5505
80bcaf34
TM		 5506/*
5507 * check whether the xattr bucket is filled up with the same hash value.
5508 * If we want to insert the xattr with the same hash, return -ENOSPC.
5509 * If we want to insert a xattr with different hash value, go ahead
5510 * and ocfs2_divide_xattr_bucket will handle this.
5511 */
01225596 5512static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
80bcaf34
TM		 5513 struct ocfs2_xattr_bucket *bucket,
5514 const char *name)
01225596 5515{
3e632946 5516 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
80bcaf34
TM		 5517 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
5518
5519 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
5520 return 0;
01225596
TM		 5521
5522 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
5523 xh->xh_entries[0].xe_name_hash) {
5524 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
5525 "hash = %u\n",
9c7759aa 5526 (unsigned long long)bucket_blkno(bucket),
01225596
TM		 5527 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
5528 return -ENOSPC;
5529 }
5530
5531 return 0;
5532}
5533
c5d95df5
JB		 5534/*
5535 * Try to set the entry in the current bucket. If we fail, the caller
5536 * will handle getting us another bucket.
5537 */
5538static int ocfs2_xattr_set_entry_bucket(struct inode *inode,
5539 struct ocfs2_xattr_info *xi,
5540 struct ocfs2_xattr_search *xs,
5541 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 5542{
c5d95df5
JB		 5543 int ret;
5544 struct ocfs2_xa_loc loc;
01225596 5545
402b4183 5546 trace_ocfs2_xattr_set_entry_bucket(xi->xi_name);
01225596 5547
c5d95df5
JB		 5548 ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
5549 xs->not_found ? NULL : xs->here);
5550 ret = ocfs2_xa_set(&loc, xi, ctxt);
5551 if (!ret) {
5552 xs->here = loc.xl_entry;
5553 goto out;
5554 }
5555 if (ret != -ENOSPC) {
5556 mlog_errno(ret);
5557 goto out;
5558 }
01225596 5559
c5d95df5
JB		 5560 /* Ok, we need space. Let's try defragmenting the bucket. */
5561 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5562 xs->bucket);
5563 if (ret) {
5564 mlog_errno(ret);
5565 goto out;
5566 }
01225596 5567
c5d95df5
JB		 5568 ret = ocfs2_xa_set(&loc, xi, ctxt);
5569 if (!ret) {
5570 xs->here = loc.xl_entry;
5571 goto out;
01225596 5572 }
c5d95df5
JB		 5573 if (ret != -ENOSPC)
5574 mlog_errno(ret);
01225596 5575
01225596 5576
c5d95df5 5577out:
c5d95df5
JB		 5578 return ret;
5579}
01225596 5580
c5d95df5
JB		 5581static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
5582 struct ocfs2_xattr_info *xi,
5583 struct ocfs2_xattr_search *xs,
5584 struct ocfs2_xattr_set_ctxt *ctxt)
5585{
5586 int ret;
01225596 5587
402b4183 5588 trace_ocfs2_xattr_set_entry_index_block(xi->xi_name);
01225596 5589
c5d95df5
JB		 5590 ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
5591 if (!ret)
5592 goto out;
5593 if (ret != -ENOSPC) {
5594 mlog_errno(ret);
5595 goto out;
5596 }
01225596 5597
c5d95df5 5598 /* Ack, need more space. Let's try to get another bucket! */
01225596 5599
c5d95df5
JB		 5600 /*
5601 * We do not allow for overlapping ranges between buckets. And
5602 * the maximum number of collisions we will allow for then is
5603 * one bucket's worth, so check it here whether we need to
5604 * add a new bucket for the insert.
5605 */
5606 ret = ocfs2_check_xattr_bucket_collision(inode,
91f2033f 5607 xs->bucket,
c5d95df5
JB		 5608 xi->xi_name);
5609 if (ret) {
5610 mlog_errno(ret);
5611 goto out;
5612 }
01225596 5613
c5d95df5
JB		 5614 ret = ocfs2_add_new_xattr_bucket(inode,
5615 xs->xattr_bh,
5616 xs->bucket,
5617 ctxt);
5618 if (ret) {
5619 mlog_errno(ret);
5620 goto out;
01225596
TM		 5621 }
5622
c5d95df5
JB		 5623 /*
5624 * ocfs2_add_new_xattr_bucket() will have updated
5625 * xs->bucket if it moved, but it will not have updated
5626 * any of the other search fields. Thus, we drop it and
5627 * re-search. Everything should be cached, so it'll be
5628 * quick.
5629 */
5630 ocfs2_xattr_bucket_relse(xs->bucket);
5631 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5632 xi->xi_name_index,
5633 xi->xi_name, xs);
5634 if (ret && ret != -ENODATA)
5635 goto out;
5636 xs->not_found = ret;
5637
5638 /* Ok, we have a new bucket, let's try again */
5639 ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
5640 if (ret && (ret != -ENOSPC))
5641 mlog_errno(ret);
5642
01225596 5643out:
01225596
TM		 5644 return ret;
5645}
a3944256
TM		 5646
5647static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5648 struct ocfs2_xattr_bucket *bucket,
5649 void *para)
5650{
ce9c5a54 5651 int ret = 0, ref_credits;
3e632946 5652 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
a3944256
TM		 5653 u16 i;
5654 struct ocfs2_xattr_entry *xe;
78f30c31
TM		 5655 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5656 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
548b0f22
JB		 5657 int credits = ocfs2_remove_extent_credits(osb->sb) +
5658 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
ce9c5a54
TM		 5659 struct ocfs2_xattr_value_root *xv;
5660 struct ocfs2_rm_xattr_bucket_para *args =
5661 (struct ocfs2_rm_xattr_bucket_para *)para;
78f30c31
TM		 5662
5663 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
a3944256
TM		 5664
5665 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5666 xe = &xh->xh_entries[i];
5667 if (ocfs2_xattr_is_local(xe))
5668 continue;
5669
ce9c5a54
TM		 5670 ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket,
5671 i, &xv, NULL);
023d4ea3
JQ		 5672 if (ret) {
5673 mlog_errno(ret);
5674 break;
5675 }
ce9c5a54
TM		 5676
5677 ret = ocfs2_lock_xattr_remove_allocators(inode, xv,
5678 args->ref_ci,
5679 args->ref_root_bh,
5680 &ctxt.meta_ac,
5681 &ref_credits);
5682
5683 ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits);
88c3b062
TM		 5684 if (IS_ERR(ctxt.handle)) {
5685 ret = PTR_ERR(ctxt.handle);
5686 mlog_errno(ret);
5687 break;
5688 }
5689
548b0f22 5690 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
78f30c31 5691 i, 0, &ctxt);
88c3b062
TM		 5692
5693 ocfs2_commit_trans(osb, ctxt.handle);
ce9c5a54
TM		 5694 if (ctxt.meta_ac) {
5695 ocfs2_free_alloc_context(ctxt.meta_ac);
5696 ctxt.meta_ac = NULL;
5697 }
a3944256
TM		 5698 if (ret) {
5699 mlog_errno(ret);
5700 break;
5701 }
5702 }
5703
ce9c5a54
TM		 5704 if (ctxt.meta_ac)
5705 ocfs2_free_alloc_context(ctxt.meta_ac);
78f30c31
TM		 5706 ocfs2_schedule_truncate_log_flush(osb, 1);
5707 ocfs2_run_deallocs(osb, &ctxt.dealloc);
a3944256
TM		 5708 return ret;
5709}
5710
492a8a33
TM		 5711/*
5712 * Whenever we modify a xattr value root in the bucket(e.g, CoW
5713 * or change the extent record flag), we need to recalculate
5714 * the metaecc for the whole bucket. So it is done here.
5715 *
5716 * Note:
5717 * We have to give the extra credits for the caller.
5718 */
5719static int ocfs2_xattr_bucket_post_refcount(struct inode *inode,
5720 handle_t *handle,
5721 void *para)
5722{
5723 int ret;
5724 struct ocfs2_xattr_bucket *bucket =
5725 (struct ocfs2_xattr_bucket *)para;
5726
5727 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
5728 OCFS2_JOURNAL_ACCESS_WRITE);
5729 if (ret) {
5730 mlog_errno(ret);
5731 return ret;
5732 }
5733
5734 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
5735
5736 return 0;
5737}
5738
5739/*
5740 * Special action we need if the xattr value is refcounted.
5741 *
5742 * 1. If the xattr is refcounted, lock the tree.
5743 * 2. CoW the xattr if we are setting the new value and the value
5744 * will be stored outside.
5745 * 3. In other case, decrease_refcount will work for us, so just
5746 * lock the refcount tree, calculate the meta and credits is OK.
5747 *
5748 * We have to do CoW before ocfs2_init_xattr_set_ctxt since
5749 * currently CoW is a completed transaction, while this function
5750 * will also lock the allocators and let us deadlock. So we will
5751 * CoW the whole xattr value.
5752 */
5753static int ocfs2_prepare_refcount_xattr(struct inode *inode,
5754 struct ocfs2_dinode *di,
5755 struct ocfs2_xattr_info *xi,
5756 struct ocfs2_xattr_search *xis,
5757 struct ocfs2_xattr_search *xbs,
5758 struct ocfs2_refcount_tree **ref_tree,
5759 int *meta_add,
5760 int *credits)
5761{
5762 int ret = 0;
5763 struct ocfs2_xattr_block *xb;
5764 struct ocfs2_xattr_entry *xe;
5765 char *base;
5766 u32 p_cluster, num_clusters;
5767 unsigned int ext_flags;
5768 int name_offset, name_len;
5769 struct ocfs2_xattr_value_buf vb;
5770 struct ocfs2_xattr_bucket *bucket = NULL;
5771 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5772 struct ocfs2_post_refcount refcount;
5773 struct ocfs2_post_refcount *p = NULL;
5774 struct buffer_head *ref_root_bh = NULL;
5775
5776 if (!xis->not_found) {
5777 xe = xis->here;
5778 name_offset = le16_to_cpu(xe->xe_name_offset);
5779 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
5780 base = xis->base;
5781 vb.vb_bh = xis->inode_bh;
5782 vb.vb_access = ocfs2_journal_access_di;
5783 } else {
5784 int i, block_off = 0;
5785 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
5786 xe = xbs->here;
5787 name_offset = le16_to_cpu(xe->xe_name_offset);
5788 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
5789 i = xbs->here - xbs->header->xh_entries;
5790
5791 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
fd68a894 5792 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
492a8a33
TM		 5793 bucket_xh(xbs->bucket),
5794 i, &block_off,
5795 &name_offset);
5796 if (ret) {
5797 mlog_errno(ret);
5798 goto out;
5799 }
5800 base = bucket_block(xbs->bucket, block_off);
5801 vb.vb_bh = xbs->bucket->bu_bhs[block_off];
5802 vb.vb_access = ocfs2_journal_access;
5803
5804 if (ocfs2_meta_ecc(osb)) {
5805 /*create parameters for ocfs2_post_refcount. */
5806 bucket = xbs->bucket;
5807 refcount.credits = bucket->bu_blocks;
5808 refcount.para = bucket;
5809 refcount.func =
5810 ocfs2_xattr_bucket_post_refcount;
5811 p = &refcount;
5812 }
5813 } else {
5814 base = xbs->base;
5815 vb.vb_bh = xbs->xattr_bh;
5816 vb.vb_access = ocfs2_journal_access_xb;
5817 }
5818 }
5819
5820 if (ocfs2_xattr_is_local(xe))
5821 goto out;
5822
5823 vb.vb_xv = (struct ocfs2_xattr_value_root *)
5824 (base + name_offset + name_len);
5825
5826 ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster,
5827 &num_clusters, &vb.vb_xv->xr_list,
5828 &ext_flags);
5829 if (ret) {
5830 mlog_errno(ret);
5831 goto out;
5832 }
5833
5834 /*
5835 * We just need to check the 1st extent record, since we always
5836 * CoW the whole xattr. So there shouldn't be a xattr with
5837 * some REFCOUNT extent recs after the 1st one.
5838 */
5839 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
5840 goto out;
5841
5842 ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc),
5843 1, ref_tree, &ref_root_bh);
5844 if (ret) {
5845 mlog_errno(ret);
5846 goto out;
5847 }
5848
5849 /*
5850 * If we are deleting the xattr or the new size will be stored inside,
5851 * cool, leave it there, the xattr truncate process will remove them
5852 * for us(it still needs the refcount tree lock and the meta, credits).
5853 * And the worse case is that every cluster truncate will split the
5854 * refcount tree, and make the original extent become 3. So we will need
5855 * 2 * cluster more extent recs at most.
5856 */
6b240ff6 5857 if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) {
492a8a33
TM		 5858
5859 ret = ocfs2_refcounted_xattr_delete_need(inode,
5860 &(*ref_tree)->rf_ci,
5861 ref_root_bh, vb.vb_xv,
5862 meta_add, credits);
5863 if (ret)
5864 mlog_errno(ret);
5865 goto out;
5866 }
5867
5868 ret = ocfs2_refcount_cow_xattr(inode, di, &vb,
5869 *ref_tree, ref_root_bh, 0,
5870 le32_to_cpu(vb.vb_xv->xr_clusters), p);
5871 if (ret)
5872 mlog_errno(ret);
5873
5874out:
5875 brelse(ref_root_bh);
5876 return ret;
5877}
5878
0129241e
TM		 5879/*
5880 * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root.
5881 * The physical clusters will be added to refcount tree.
5882 */
5883static int ocfs2_xattr_value_attach_refcount(struct inode *inode,
5884 struct ocfs2_xattr_value_root *xv,
5885 struct ocfs2_extent_tree *value_et,
5886 struct ocfs2_caching_info *ref_ci,
5887 struct buffer_head *ref_root_bh,
5888 struct ocfs2_cached_dealloc_ctxt *dealloc,
5889 struct ocfs2_post_refcount *refcount)
5890{
5891 int ret = 0;
5892 u32 clusters = le32_to_cpu(xv->xr_clusters);
5893 u32 cpos, p_cluster, num_clusters;
5894 struct ocfs2_extent_list *el = &xv->xr_list;
5895 unsigned int ext_flags;
5896
5897 cpos = 0;
5898 while (cpos < clusters) {
5899 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
5900 &num_clusters, el, &ext_flags);
17caf955
JQ		 5901 if (ret) {
5902 mlog_errno(ret);
5903 break;
5904 }
0129241e
TM		 5905
5906 cpos += num_clusters;
5907 if ((ext_flags & OCFS2_EXT_REFCOUNTED))
5908 continue;
5909
5910 BUG_ON(!p_cluster);
5911
5912 ret = ocfs2_add_refcount_flag(inode, value_et,
5913 ref_ci, ref_root_bh,
5914 cpos - num_clusters,
5915 p_cluster, num_clusters,
5916 dealloc, refcount);
5917 if (ret) {
5918 mlog_errno(ret);
5919 break;
5920 }
5921 }
5922
5923 return ret;
5924}
5925
5926/*
5927 * Given a normal ocfs2_xattr_header, refcount all the entries which
5928 * have value stored outside.
5929 * Used for xattrs stored in inode and ocfs2_xattr_block.
5930 */
5931static int ocfs2_xattr_attach_refcount_normal(struct inode *inode,
5932 struct ocfs2_xattr_value_buf *vb,
5933 struct ocfs2_xattr_header *header,
5934 struct ocfs2_caching_info *ref_ci,
5935 struct buffer_head *ref_root_bh,
5936 struct ocfs2_cached_dealloc_ctxt *dealloc)
5937{
5938
5939 struct ocfs2_xattr_entry *xe;
5940 struct ocfs2_xattr_value_root *xv;
5941 struct ocfs2_extent_tree et;
5942 int i, ret = 0;
5943
5944 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
5945 xe = &header->xh_entries[i];
5946
5947 if (ocfs2_xattr_is_local(xe))
5948 continue;
5949
5950 xv = (struct ocfs2_xattr_value_root *)((void *)header +
5951 le16_to_cpu(xe->xe_name_offset) +
5952 OCFS2_XATTR_SIZE(xe->xe_name_len));
5953
5954 vb->vb_xv = xv;
5955 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
5956
5957 ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et,
5958 ref_ci, ref_root_bh,
5959 dealloc, NULL);
5960 if (ret) {
5961 mlog_errno(ret);
5962 break;
5963 }
5964 }
5965
5966 return ret;
5967}
5968
5969static int ocfs2_xattr_inline_attach_refcount(struct inode *inode,
5970 struct buffer_head *fe_bh,
5971 struct ocfs2_caching_info *ref_ci,
5972 struct buffer_head *ref_root_bh,
5973 struct ocfs2_cached_dealloc_ctxt *dealloc)
5974{
5975 struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data;
5976 struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *)
5977 (fe_bh->b_data + inode->i_sb->s_blocksize -
5978 le16_to_cpu(di->i_xattr_inline_size));
5979 struct ocfs2_xattr_value_buf vb = {
5980 .vb_bh = fe_bh,
5981 .vb_access = ocfs2_journal_access_di,
5982 };
5983
5984 return ocfs2_xattr_attach_refcount_normal(inode, &vb, header,
5985 ref_ci, ref_root_bh, dealloc);
5986}
5987
5988struct ocfs2_xattr_tree_value_refcount_para {
5989 struct ocfs2_caching_info *ref_ci;
5990 struct buffer_head *ref_root_bh;
5991 struct ocfs2_cached_dealloc_ctxt *dealloc;
5992};
5993
5994static int ocfs2_get_xattr_tree_value_root(struct super_block *sb,
5995 struct ocfs2_xattr_bucket *bucket,
5996 int offset,
5997 struct ocfs2_xattr_value_root **xv,
5998 struct buffer_head **bh)
5999{
6000 int ret, block_off, name_offset;
6001 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
6002 struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
6003 void *base;
6004
6005 ret = ocfs2_xattr_bucket_get_name_value(sb,
6006 bucket_xh(bucket),
6007 offset,
6008 &block_off,
6009 &name_offset);
6010 if (ret) {
6011 mlog_errno(ret);
6012 goto out;
6013 }
6014
6015 base = bucket_block(bucket, block_off);
6016
6017 *xv = (struct ocfs2_xattr_value_root *)(base + name_offset +
6018 OCFS2_XATTR_SIZE(xe->xe_name_len));
6019
6020 if (bh)
6021 *bh = bucket->bu_bhs[block_off];
6022out:
6023 return ret;
6024}
6025
6026/*
6027 * For a given xattr bucket, refcount all the entries which
6028 * have value stored outside.
6029 */
6030static int ocfs2_xattr_bucket_value_refcount(struct inode *inode,
6031 struct ocfs2_xattr_bucket *bucket,
6032 void *para)
6033{
6034 int i, ret = 0;
6035 struct ocfs2_extent_tree et;
6036 struct ocfs2_xattr_tree_value_refcount_para *ref =
6037 (struct ocfs2_xattr_tree_value_refcount_para *)para;
6038 struct ocfs2_xattr_header *xh =
6039 (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
6040 struct ocfs2_xattr_entry *xe;
6041 struct ocfs2_xattr_value_buf vb = {
6042 .vb_access = ocfs2_journal_access,
6043 };
6044 struct ocfs2_post_refcount refcount = {
6045 .credits = bucket->bu_blocks,
6046 .para = bucket,
6047 .func = ocfs2_xattr_bucket_post_refcount,
6048 };
6049 struct ocfs2_post_refcount *p = NULL;
6050
6051 /* We only need post_refcount if we support metaecc. */
6052 if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb)))
6053 p = &refcount;
6054
402b4183
TM		 6055 trace_ocfs2_xattr_bucket_value_refcount(
6056 (unsigned long long)bucket_blkno(bucket),
6057 le16_to_cpu(xh->xh_count));
0129241e
TM		 6058 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
6059 xe = &xh->xh_entries[i];
6060
6061 if (ocfs2_xattr_is_local(xe))
6062 continue;
6063
6064 ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i,
6065 &vb.vb_xv, &vb.vb_bh);
6066 if (ret) {
6067 mlog_errno(ret);
6068 break;
6069 }
6070
6071 ocfs2_init_xattr_value_extent_tree(&et,
6072 INODE_CACHE(inode), &vb);
6073
6074 ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv,
6075 &et, ref->ref_ci,
6076 ref->ref_root_bh,
6077 ref->dealloc, p);
6078 if (ret) {
6079 mlog_errno(ret);
6080 break;
6081 }
6082 }
6083
6084 return ret;
6085
6086}
6087
6088static int ocfs2_refcount_xattr_tree_rec(struct inode *inode,
6089 struct buffer_head *root_bh,
6090 u64 blkno, u32 cpos, u32 len, void *para)
6091{
6092 return ocfs2_iterate_xattr_buckets(inode, blkno, len,
6093 ocfs2_xattr_bucket_value_refcount,
6094 para);
6095}
6096
6097static int ocfs2_xattr_block_attach_refcount(struct inode *inode,
6098 struct buffer_head *blk_bh,
6099 struct ocfs2_caching_info *ref_ci,
6100 struct buffer_head *ref_root_bh,
6101 struct ocfs2_cached_dealloc_ctxt *dealloc)
6102{
6103 int ret = 0;
6104 struct ocfs2_xattr_block *xb =
6105 (struct ocfs2_xattr_block *)blk_bh->b_data;
6106
6107 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
6108 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
6109 struct ocfs2_xattr_value_buf vb = {
6110 .vb_bh = blk_bh,
6111 .vb_access = ocfs2_journal_access_xb,
6112 };
6113
6114 ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header,
6115 ref_ci, ref_root_bh,
6116 dealloc);
6117 } else {
6118 struct ocfs2_xattr_tree_value_refcount_para para = {
6119 .ref_ci = ref_ci,
6120 .ref_root_bh = ref_root_bh,
6121 .dealloc = dealloc,
6122 };
6123
6124 ret = ocfs2_iterate_xattr_index_block(inode, blk_bh,
6125 ocfs2_refcount_xattr_tree_rec,
6126 &para);
6127 }
6128
6129 return ret;
6130}
6131
6132int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
6133 struct buffer_head *fe_bh,
6134 struct ocfs2_caching_info *ref_ci,
6135 struct buffer_head *ref_root_bh,
6136 struct ocfs2_cached_dealloc_ctxt *dealloc)
6137{
6138 int ret = 0;
6139 struct ocfs2_inode_info *oi = OCFS2_I(inode);
6140 struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data;
6141 struct buffer_head *blk_bh = NULL;
6142
6143 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
6144 ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh,
6145 ref_ci, ref_root_bh,
6146 dealloc);
6147 if (ret) {
6148 mlog_errno(ret);
6149 goto out;
6150 }
6151 }
6152
6153 if (!di->i_xattr_loc)
6154 goto out;
6155
6156 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
6157 &blk_bh);
6158 if (ret < 0) {
6159 mlog_errno(ret);
6160 goto out;
6161 }
6162
6163 ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci,
6164 ref_root_bh, dealloc);
6165 if (ret)
6166 mlog_errno(ret);
6167
6168 brelse(blk_bh);
6169out:
6170
6171 return ret;
6172}
6173
0fe9b66c 6174typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe);
2999d12f
TM		 6175/*
6176 * Store the information we need in xattr reflink.
6177 * old_bh and new_bh are inode bh for the old and new inode.
6178 */
6179struct ocfs2_xattr_reflink {
6180 struct inode *old_inode;
6181 struct inode *new_inode;
6182 struct buffer_head *old_bh;
6183 struct buffer_head *new_bh;
6184 struct ocfs2_caching_info *ref_ci;
6185 struct buffer_head *ref_root_bh;
6186 struct ocfs2_cached_dealloc_ctxt *dealloc;
0fe9b66c 6187 should_xattr_reflinked *xattr_reflinked;
2999d12f
TM		 6188};
6189
6190/*
6191 * Given a xattr header and xe offset,
6192 * return the proper xv and the corresponding bh.
6193 * xattr in inode, block and xattr tree have different implementaions.
6194 */
6195typedef int (get_xattr_value_root)(struct super_block *sb,
6196 struct buffer_head *bh,
6197 struct ocfs2_xattr_header *xh,
6198 int offset,
6199 struct ocfs2_xattr_value_root **xv,
6200 struct buffer_head **ret_bh,
6201 void *para);
6202
6203/*
6204 * Calculate all the xattr value root metadata stored in this xattr header and
6205 * credits we need if we create them from the scratch.
6206 * We use get_xattr_value_root so that all types of xattr container can use it.
6207 */
6208static int ocfs2_value_metas_in_xattr_header(struct super_block *sb,
6209 struct buffer_head *bh,
6210 struct ocfs2_xattr_header *xh,
6211 int *metas, int *credits,
6212 int *num_recs,
6213 get_xattr_value_root *func,
6214 void *para)
6215{
6216 int i, ret = 0;
6217 struct ocfs2_xattr_value_root *xv;
6218 struct ocfs2_xattr_entry *xe;
6219
6220 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
6221 xe = &xh->xh_entries[i];
6222 if (ocfs2_xattr_is_local(xe))
6223 continue;
6224
6225 ret = func(sb, bh, xh, i, &xv, NULL, para);
6226 if (ret) {
6227 mlog_errno(ret);
6228 break;
6229 }
6230
6231 *metas += le16_to_cpu(xv->xr_list.l_tree_depth) *
6232 le16_to_cpu(xv->xr_list.l_next_free_rec);
6233
6234 *credits += ocfs2_calc_extend_credits(sb,
06f9da6e 6235 &def_xv.xv.xr_list);
2999d12f
TM		 6236
6237 /*
6238 * If the value is a tree with depth > 1, We don't go deep
6239 * to the extent block, so just calculate a maximum record num.
6240 */
6241 if (!xv->xr_list.l_tree_depth)
8ff6af88 6242 *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec);
2999d12f
TM		 6243 else
6244 *num_recs += ocfs2_clusters_for_bytes(sb,
6245 XATTR_SIZE_MAX);
6246 }
6247
6248 return ret;
6249}
6250
6251/* Used by xattr inode and block to return the right xv and buffer_head. */
6252static int ocfs2_get_xattr_value_root(struct super_block *sb,
6253 struct buffer_head *bh,
6254 struct ocfs2_xattr_header *xh,
6255 int offset,
6256 struct ocfs2_xattr_value_root **xv,
6257 struct buffer_head **ret_bh,
6258 void *para)
6259{
6260 struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
6261
6262 *xv = (struct ocfs2_xattr_value_root *)((void *)xh +
6263 le16_to_cpu(xe->xe_name_offset) +
6264 OCFS2_XATTR_SIZE(xe->xe_name_len));
6265
6266 if (ret_bh)
6267 *ret_bh = bh;
6268
6269 return 0;
6270}
6271
6272/*
6273 * Lock the meta_ac and caculate how much credits we need for reflink xattrs.
6274 * It is only used for inline xattr and xattr block.
6275 */
6276static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb,
6277 struct ocfs2_xattr_header *xh,
6278 struct buffer_head *ref_root_bh,
6279 int *credits,
6280 struct ocfs2_alloc_context **meta_ac)
6281{
6282 int ret, meta_add = 0, num_recs = 0;
6283 struct ocfs2_refcount_block *rb =
6284 (struct ocfs2_refcount_block *)ref_root_bh->b_data;
6285
6286 *credits = 0;
6287
6288 ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh,
6289 &meta_add, credits, &num_recs,
6290 ocfs2_get_xattr_value_root,
6291 NULL);
6292 if (ret) {
6293 mlog_errno(ret);
6294 goto out;
6295 }
6296
6297 /*
6298 * We need to add/modify num_recs in refcount tree, so just calculate
6299 * an approximate number we need for refcount tree change.
6300 * Sometimes we need to split the tree, and after split, half recs
6301 * will be moved to the new block, and a new block can only provide
6302 * half number of recs. So we multiple new blocks by 2.
6303 */
6304 num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2;
6305 meta_add += num_recs;
6306 *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
6307 if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
6308 *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
6309 le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
6310 else
6311 *credits += 1;
6312
6313 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac);
6314 if (ret)
6315 mlog_errno(ret);
6316
6317out:
6318 return ret;
6319}
6320
6321/*
6322 * Given a xattr header, reflink all the xattrs in this container.
6323 * It can be used for inode, block and bucket.
6324 *
6325 * NOTE:
6326 * Before we call this function, the caller has memcpy the xattr in
6327 * old_xh to the new_xh.
0fe9b66c
TM		 6328 *
6329 * If args.xattr_reflinked is set, call it to decide whether the xe should
6330 * be reflinked or not. If not, remove it from the new xattr header.
2999d12f
TM		 6331 */
6332static int ocfs2_reflink_xattr_header(handle_t *handle,
6333 struct ocfs2_xattr_reflink *args,
6334 struct buffer_head *old_bh,
6335 struct ocfs2_xattr_header *xh,
6336 struct buffer_head *new_bh,
6337 struct ocfs2_xattr_header *new_xh,
6338 struct ocfs2_xattr_value_buf *vb,
6339 struct ocfs2_alloc_context *meta_ac,
6340 get_xattr_value_root *func,
6341 void *para)
6342{
0fe9b66c 6343 int ret = 0, i, j;
2999d12f
TM		 6344 struct super_block *sb = args->old_inode->i_sb;
6345 struct buffer_head *value_bh;
0fe9b66c 6346 struct ocfs2_xattr_entry *xe, *last;
2999d12f
TM		 6347 struct ocfs2_xattr_value_root *xv, *new_xv;
6348 struct ocfs2_extent_tree data_et;
6349 u32 clusters, cpos, p_cluster, num_clusters;
6350 unsigned int ext_flags = 0;
6351
402b4183
TM		 6352 trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr,
6353 le16_to_cpu(xh->xh_count));
0fe9b66c
TM		 6354
6355 last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)];
6356 for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) {
2999d12f
TM		 6357 xe = &xh->xh_entries[i];
6358
0fe9b66c
TM		 6359 if (args->xattr_reflinked && !args->xattr_reflinked(xe)) {
6360 xe = &new_xh->xh_entries[j];
6361
6362 le16_add_cpu(&new_xh->xh_count, -1);
6363 if (new_xh->xh_count) {
6364 memmove(xe, xe + 1,
6365 (void *)last - (void *)xe);
6366 memset(last, 0,
6367 sizeof(struct ocfs2_xattr_entry));
6368 }
6369
6370 /*
6371 * We don't want j to increase in the next round since
6372 * it is already moved ahead.
6373 */
6374 j--;
6375 continue;
6376 }
6377
2999d12f
TM		 6378 if (ocfs2_xattr_is_local(xe))
6379 continue;
6380
6381 ret = func(sb, old_bh, xh, i, &xv, NULL, para);
6382 if (ret) {
6383 mlog_errno(ret);
6384 break;
6385 }
6386
0fe9b66c 6387 ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para);
2999d12f
TM		 6388 if (ret) {
6389 mlog_errno(ret);
6390 break;
6391 }
6392
6393 /*
6394 * For the xattr which has l_tree_depth = 0, all the extent
6395 * recs have already be copied to the new xh with the
6396 * propriate OCFS2_EXT_REFCOUNTED flag we just need to
6397 * increase the refount count int the refcount tree.
6398 *
6399 * For the xattr which has l_tree_depth > 0, we need
6400 * to initialize it to the empty default value root,
6401 * and then insert the extents one by one.
6402 */
6403 if (xv->xr_list.l_tree_depth) {
32ed0bd7 6404 memcpy(new_xv, &def_xv, OCFS2_XATTR_ROOT_SIZE);
2999d12f
TM		 6405 vb->vb_xv = new_xv;
6406 vb->vb_bh = value_bh;
6407 ocfs2_init_xattr_value_extent_tree(&data_et,
6408 INODE_CACHE(args->new_inode), vb);
6409 }
6410
6411 clusters = le32_to_cpu(xv->xr_clusters);
6412 cpos = 0;
6413 while (cpos < clusters) {
6414 ret = ocfs2_xattr_get_clusters(args->old_inode,
6415 cpos,
6416 &p_cluster,
6417 &num_clusters,
6418 &xv->xr_list,
6419 &ext_flags);
6420 if (ret) {
6421 mlog_errno(ret);
6422 goto out;
6423 }
6424
6425 BUG_ON(!p_cluster);
6426
6427 if (xv->xr_list.l_tree_depth) {
6428 ret = ocfs2_insert_extent(handle,
6429 &data_et, cpos,
6430 ocfs2_clusters_to_blocks(
6431 args->old_inode->i_sb,
6432 p_cluster),
6433 num_clusters, ext_flags,
6434 meta_ac);
6435 if (ret) {
6436 mlog_errno(ret);
6437 goto out;
6438 }
6439 }
6440
6441 ret = ocfs2_increase_refcount(handle, args->ref_ci,
6442 args->ref_root_bh,
6443 p_cluster, num_clusters,
6444 meta_ac, args->dealloc);
6445 if (ret) {
6446 mlog_errno(ret);
6447 goto out;
6448 }
6449
6450 cpos += num_clusters;
6451 }
6452 }
6453
6454out:
6455 return ret;
6456}
6457
6458static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
6459{
6460 int ret = 0, credits = 0;
6461 handle_t *handle;
6462 struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb);
6463 struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data;
6464 int inline_size = le16_to_cpu(di->i_xattr_inline_size);
6465 int header_off = osb->sb->s_blocksize - inline_size;
6466 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)
6467 (args->old_bh->b_data + header_off);
6468 struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *)
6469 (args->new_bh->b_data + header_off);
6470 struct ocfs2_alloc_context *meta_ac = NULL;
6471 struct ocfs2_inode_info *new_oi;
6472 struct ocfs2_dinode *new_di;
6473 struct ocfs2_xattr_value_buf vb = {
6474 .vb_bh = args->new_bh,
6475 .vb_access = ocfs2_journal_access_di,
6476 };
6477
6478 ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
6479 &credits, &meta_ac);
6480 if (ret) {
6481 mlog_errno(ret);
6482 goto out;
6483 }
6484
6485 handle = ocfs2_start_trans(osb, credits);
6486 if (IS_ERR(handle)) {
6487 ret = PTR_ERR(handle);
6488 mlog_errno(ret);
6489 goto out;
6490 }
6491
6492 ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode),
6493 args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE);
6494 if (ret) {
6495 mlog_errno(ret);
6496 goto out_commit;
6497 }
6498
6499 memcpy(args->new_bh->b_data + header_off,
6500 args->old_bh->b_data + header_off, inline_size);
6501
6502 new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
6503 new_di->i_xattr_inline_size = cpu_to_le16(inline_size);
6504
6505 ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh,
6506 args->new_bh, new_xh, &vb, meta_ac,
6507 ocfs2_get_xattr_value_root, NULL);
6508 if (ret) {
6509 mlog_errno(ret);
6510 goto out_commit;
6511 }
6512
6513 new_oi = OCFS2_I(args->new_inode);
ef962df0
JB		 6514 /*
6515 * Adjust extent record count to reserve space for extended attribute.
6516 * Inline data count had been adjusted in ocfs2_duplicate_inline_data().
6517 */
6518 if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) &&
6519 !(ocfs2_inode_is_fast_symlink(args->new_inode))) {
6520 struct ocfs2_extent_list *el = &new_di->id2.i_list;
6521 le16_add_cpu(&el->l_count, -(inline_size /
6522 sizeof(struct ocfs2_extent_rec)));
6523 }
2999d12f
TM		 6524 spin_lock(&new_oi->ip_lock);
6525 new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
6526 new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
6527 spin_unlock(&new_oi->ip_lock);
6528
6529 ocfs2_journal_dirty(handle, args->new_bh);
6530
6531out_commit:
6532 ocfs2_commit_trans(osb, handle);
6533
6534out:
6535 if (meta_ac)
6536 ocfs2_free_alloc_context(meta_ac);
6537 return ret;
6538}
6539
6540static int ocfs2_create_empty_xattr_block(struct inode *inode,
6541 struct buffer_head *fe_bh,
6542 struct buffer_head **ret_bh,
6543 int indexed)
6544{
6545 int ret;
2999d12f 6546 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
b2317968 6547 struct ocfs2_xattr_set_ctxt ctxt;
2999d12f 6548
b2317968
TM		 6549 memset(&ctxt, 0, sizeof(ctxt));
6550 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac);
2999d12f
TM		 6551 if (ret < 0) {
6552 mlog_errno(ret);
6553 return ret;
6554 }
6555
d3981544
JB		 6556 ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
6557 if (IS_ERR(ctxt.handle)) {
6558 ret = PTR_ERR(ctxt.handle);
2999d12f
TM		 6559 mlog_errno(ret);
6560 goto out;
6561 }
6562
402b4183
TM		 6563 trace_ocfs2_create_empty_xattr_block(
6564 (unsigned long long)fe_bh->b_blocknr, indexed);
d3981544
JB		 6565 ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed,
6566 ret_bh);
2999d12f
TM		 6567 if (ret)
6568 mlog_errno(ret);
6569
d3981544 6570 ocfs2_commit_trans(osb, ctxt.handle);
2999d12f 6571out:
b2317968 6572 ocfs2_free_alloc_context(ctxt.meta_ac);
2999d12f
TM		 6573 return ret;
6574}
6575
6576static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args,
6577 struct buffer_head *blk_bh,
6578 struct buffer_head *new_blk_bh)
6579{
6580 int ret = 0, credits = 0;
6581 handle_t *handle;
6582 struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode);
6583 struct ocfs2_dinode *new_di;
6584 struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb);
6585 int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
6586 struct ocfs2_xattr_block *xb =
6587 (struct ocfs2_xattr_block *)blk_bh->b_data;
6588 struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header;
6589 struct ocfs2_xattr_block *new_xb =
6590 (struct ocfs2_xattr_block *)new_blk_bh->b_data;
6591 struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header;
6592 struct ocfs2_alloc_context *meta_ac;
6593 struct ocfs2_xattr_value_buf vb = {
6594 .vb_bh = new_blk_bh,
6595 .vb_access = ocfs2_journal_access_xb,
6596 };
6597
6598 ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
6599 &credits, &meta_ac);
6600 if (ret) {
6601 mlog_errno(ret);
6602 return ret;
6603 }
6604
6605 /* One more credits in case we need to add xattr flags in new inode. */
6606 handle = ocfs2_start_trans(osb, credits + 1);
6607 if (IS_ERR(handle)) {
6608 ret = PTR_ERR(handle);
6609 mlog_errno(ret);
6610 goto out;
6611 }
6612
6613 if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
6614 ret = ocfs2_journal_access_di(handle,
6615 INODE_CACHE(args->new_inode),
6616 args->new_bh,
6617 OCFS2_JOURNAL_ACCESS_WRITE);
6618 if (ret) {
6619 mlog_errno(ret);
6620 goto out_commit;
6621 }
6622 }
6623
6624 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode),
6625 new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE);
6626 if (ret) {
6627 mlog_errno(ret);
6628 goto out_commit;
6629 }
6630
6631 memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off,
6632 osb->sb->s_blocksize - header_off);
6633
6634 ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh,
6635 new_blk_bh, new_xh, &vb, meta_ac,
6636 ocfs2_get_xattr_value_root, NULL);
6637 if (ret) {
6638 mlog_errno(ret);
6639 goto out_commit;
6640 }
6641
6642 ocfs2_journal_dirty(handle, new_blk_bh);
6643
6644 if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
6645 new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
6646 spin_lock(&new_oi->ip_lock);
6647 new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
6648 new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
6649 spin_unlock(&new_oi->ip_lock);
6650
6651 ocfs2_journal_dirty(handle, args->new_bh);
6652 }
6653
6654out_commit:
6655 ocfs2_commit_trans(osb, handle);
6656
6657out:
6658 ocfs2_free_alloc_context(meta_ac);
6659 return ret;
6660}
6661
6662struct ocfs2_reflink_xattr_tree_args {
6663 struct ocfs2_xattr_reflink *reflink;
6664 struct buffer_head *old_blk_bh;
6665 struct buffer_head *new_blk_bh;
6666 struct ocfs2_xattr_bucket *old_bucket;
6667 struct ocfs2_xattr_bucket *new_bucket;
6668};
6669
6670/*
6671 * NOTE:
6672 * We have to handle the case that both old bucket and new bucket
6673 * will call this function to get the right ret_bh.
6674 * So The caller must give us the right bh.
6675 */
6676static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb,
6677 struct buffer_head *bh,
6678 struct ocfs2_xattr_header *xh,
6679 int offset,
6680 struct ocfs2_xattr_value_root **xv,
6681 struct buffer_head **ret_bh,
6682 void *para)
6683{
6684 struct ocfs2_reflink_xattr_tree_args *args =
6685 (struct ocfs2_reflink_xattr_tree_args *)para;
6686 struct ocfs2_xattr_bucket *bucket;
6687
6688 if (bh == args->old_bucket->bu_bhs[0])
6689 bucket = args->old_bucket;
6690 else
6691 bucket = args->new_bucket;
6692
6693 return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
6694 xv, ret_bh);
6695}
6696
6697struct ocfs2_value_tree_metas {
6698 int num_metas;
6699 int credits;
6700 int num_recs;
6701};
6702
6703static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb,
6704 struct buffer_head *bh,
6705 struct ocfs2_xattr_header *xh,
6706 int offset,
6707 struct ocfs2_xattr_value_root **xv,
6708 struct buffer_head **ret_bh,
6709 void *para)
6710{
6711 struct ocfs2_xattr_bucket *bucket =
6712 (struct ocfs2_xattr_bucket *)para;
6713
6714 return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
6715 xv, ret_bh);
6716}
6717
6718static int ocfs2_calc_value_tree_metas(struct inode *inode,
6719 struct ocfs2_xattr_bucket *bucket,
6720 void *para)
6721{
6722 struct ocfs2_value_tree_metas *metas =
6723 (struct ocfs2_value_tree_metas *)para;
6724 struct ocfs2_xattr_header *xh =
6725 (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
6726
6727 /* Add the credits for this bucket first. */
6728 metas->credits += bucket->bu_blocks;
6729 return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0],
6730 xh, &metas->num_metas,
6731 &metas->credits, &metas->num_recs,
6732 ocfs2_value_tree_metas_in_bucket,
6733 bucket);
6734}
6735
6736/*
6737 * Given a xattr extent rec starting from blkno and having len clusters,
6738 * iterate all the buckets calculate how much metadata we need for reflinking
6739 * all the ocfs2_xattr_value_root and lock the allocators accordingly.
6740 */
6741static int ocfs2_lock_reflink_xattr_rec_allocators(
6742 struct ocfs2_reflink_xattr_tree_args *args,
6743 struct ocfs2_extent_tree *xt_et,
6744 u64 blkno, u32 len, int *credits,
6745 struct ocfs2_alloc_context **meta_ac,
6746 struct ocfs2_alloc_context **data_ac)
6747{
6748 int ret, num_free_extents;
6749 struct ocfs2_value_tree_metas metas;
6750 struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb);
6751 struct ocfs2_refcount_block *rb;
6752
6753 memset(&metas, 0, sizeof(metas));
6754
6755 ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len,
6756 ocfs2_calc_value_tree_metas, &metas);
6757 if (ret) {
6758 mlog_errno(ret);
6759 goto out;
6760 }
6761
6762 *credits = metas.credits;
6763
6764 /*
6765 * Calculate we need for refcount tree change.
6766 *
6767 * We need to add/modify num_recs in refcount tree, so just calculate
6768 * an approximate number we need for refcount tree change.
6769 * Sometimes we need to split the tree, and after split, half recs
6770 * will be moved to the new block, and a new block can only provide
6771 * half number of recs. So we multiple new blocks by 2.
6772 * In the end, we have to add credits for modifying the already
6773 * existed refcount block.
6774 */
6775 rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data;
6776 metas.num_recs =
6777 (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) /
6778 ocfs2_refcount_recs_per_rb(osb->sb) * 2;
6779 metas.num_metas += metas.num_recs;
6780 *credits += metas.num_recs +
6781 metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
6782 if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
6783 *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
6784 le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
6785 else
6786 *credits += 1;
6787
6788 /* count in the xattr tree change. */
964f14a0 6789 num_free_extents = ocfs2_num_free_extents(xt_et);
2999d12f
TM		 6790 if (num_free_extents < 0) {
6791 ret = num_free_extents;
6792 mlog_errno(ret);
6793 goto out;
6794 }
6795
6796 if (num_free_extents < len)
6797 metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el);
6798
6799 *credits += ocfs2_calc_extend_credits(osb->sb,
06f9da6e 6800 xt_et->et_root_el);
2999d12f
TM		 6801
6802 if (metas.num_metas) {
6803 ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas,
6804 meta_ac);
6805 if (ret) {
6806 mlog_errno(ret);
6807 goto out;
6808 }
6809 }
6810
6811 if (len) {
6812 ret = ocfs2_reserve_clusters(osb, len, data_ac);
6813 if (ret)
6814 mlog_errno(ret);
6815 }
6816out:
6817 if (ret) {
6818 if (*meta_ac) {
6819 ocfs2_free_alloc_context(*meta_ac);
6cae6d31 6820 *meta_ac = NULL;
2999d12f
TM		 6821 }
6822 }
6823
6824 return ret;
6825}
6826
121a39bb 6827static int ocfs2_reflink_xattr_bucket(handle_t *handle,
2999d12f 6828 u64 blkno, u64 new_blkno, u32 clusters,
121a39bb 6829 u32 *cpos, int num_buckets,
2999d12f
TM		 6830 struct ocfs2_alloc_context *meta_ac,
6831 struct ocfs2_alloc_context *data_ac,
6832 struct ocfs2_reflink_xattr_tree_args *args)
6833{
6834 int i, j, ret = 0;
6835 struct super_block *sb = args->reflink->old_inode->i_sb;
2999d12f
TM		 6836 int bpb = args->old_bucket->bu_blocks;
6837 struct ocfs2_xattr_value_buf vb = {
6838 .vb_access = ocfs2_journal_access,
6839 };
6840
6841 for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) {
6842 ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
6843 if (ret) {
6844 mlog_errno(ret);
6845 break;
6846 }
6847
9c339255 6848 ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno, 1);
2999d12f
TM		 6849 if (ret) {
6850 mlog_errno(ret);
6851 break;
6852 }
6853
2999d12f
TM		 6854 ret = ocfs2_xattr_bucket_journal_access(handle,
6855 args->new_bucket,
6856 OCFS2_JOURNAL_ACCESS_CREATE);
6857 if (ret) {
6858 mlog_errno(ret);
6859 break;
6860 }
6861
6862 for (j = 0; j < bpb; j++)
6863 memcpy(bucket_block(args->new_bucket, j),
6864 bucket_block(args->old_bucket, j),
6865 sb->s_blocksize);
6866
121a39bb
TM		 6867 /*
6868 * Record the start cpos so that we can use it to initialize
6869 * our xattr tree we also set the xh_num_bucket for the new
6870 * bucket.
6871 */
6872 if (i == 0) {
6873 *cpos = le32_to_cpu(bucket_xh(args->new_bucket)->
6874 xh_entries[0].xe_name_hash);
6875 bucket_xh(args->new_bucket)->xh_num_buckets =
6876 cpu_to_le16(num_buckets);
6877 }
6878
2999d12f
TM		 6879 ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
6880
6881 ret = ocfs2_reflink_xattr_header(handle, args->reflink,
6882 args->old_bucket->bu_bhs[0],
6883 bucket_xh(args->old_bucket),
6884 args->new_bucket->bu_bhs[0],
6885 bucket_xh(args->new_bucket),
6886 &vb, meta_ac,
6887 ocfs2_get_reflink_xattr_value_root,
6888 args);
6889 if (ret) {
6890 mlog_errno(ret);
6891 break;
6892 }
6893
6894 /*
6895 * Re-access and dirty the bucket to calculate metaecc.
6896 * Because we may extend the transaction in reflink_xattr_header
6897 * which will let the already accessed block gone.
6898 */
6899 ret = ocfs2_xattr_bucket_journal_access(handle,
6900 args->new_bucket,
6901 OCFS2_JOURNAL_ACCESS_WRITE);
6902 if (ret) {
6903 mlog_errno(ret);
6904 break;
6905 }
6906
6907 ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
121a39bb 6908
2999d12f
TM		 6909 ocfs2_xattr_bucket_relse(args->old_bucket);
6910 ocfs2_xattr_bucket_relse(args->new_bucket);
6911 }
6912
6913 ocfs2_xattr_bucket_relse(args->old_bucket);
6914 ocfs2_xattr_bucket_relse(args->new_bucket);
6915 return ret;
6916}
121a39bb
TM		 6917
6918static int ocfs2_reflink_xattr_buckets(handle_t *handle,
6919 struct inode *inode,
6920 struct ocfs2_reflink_xattr_tree_args *args,
6921 struct ocfs2_extent_tree *et,
6922 struct ocfs2_alloc_context *meta_ac,
6923 struct ocfs2_alloc_context *data_ac,
6924 u64 blkno, u32 cpos, u32 len)
6925{
6926 int ret, first_inserted = 0;
6927 u32 p_cluster, num_clusters, reflink_cpos = 0;
6928 u64 new_blkno;
6929 unsigned int num_buckets, reflink_buckets;
6930 unsigned int bpc =
6931 ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
6932
6933 ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
6934 if (ret) {
6935 mlog_errno(ret);
6936 goto out;
6937 }
6938 num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets);
6939 ocfs2_xattr_bucket_relse(args->old_bucket);
6940
6941 while (len && num_buckets) {
6942 ret = ocfs2_claim_clusters(handle, data_ac,
6943 1, &p_cluster, &num_clusters);
6944 if (ret) {
6945 mlog_errno(ret);
6946 goto out;
6947 }
6948
6949 new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
6950 reflink_buckets = min(num_buckets, bpc * num_clusters);
6951
6952 ret = ocfs2_reflink_xattr_bucket(handle, blkno,
6953 new_blkno, num_clusters,
6954 &reflink_cpos, reflink_buckets,
6955 meta_ac, data_ac, args);
6956 if (ret) {
6957 mlog_errno(ret);
6958 goto out;
6959 }
6960
6961 /*
6962 * For the 1st allocated cluster, we make it use the same cpos
6963 * so that the xattr tree looks the same as the original one
6964 * in the most case.
6965 */
6966 if (!first_inserted) {
6967 reflink_cpos = cpos;
6968 first_inserted = 1;
6969 }
6970 ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno,
6971 num_clusters, 0, meta_ac);
6972 if (ret)
6973 mlog_errno(ret);
6974
402b4183
TM		 6975 trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno,
6976 num_clusters, reflink_cpos);
121a39bb
TM		 6977
6978 len -= num_clusters;
6979 blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters);
6980 num_buckets -= reflink_buckets;
6981 }
6982out:
6983 return ret;
6984}
6985
2999d12f
TM		 6986/*
6987 * Create the same xattr extent record in the new inode's xattr tree.
6988 */
6989static int ocfs2_reflink_xattr_rec(struct inode *inode,
6990 struct buffer_head *root_bh,
6991 u64 blkno,
6992 u32 cpos,
6993 u32 len,
6994 void *para)
6995{
6996 int ret, credits = 0;
2999d12f
TM		 6997 handle_t *handle;
6998 struct ocfs2_reflink_xattr_tree_args *args =
6999 (struct ocfs2_reflink_xattr_tree_args *)para;
7000 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
7001 struct ocfs2_alloc_context *meta_ac = NULL;
7002 struct ocfs2_alloc_context *data_ac = NULL;
7003 struct ocfs2_extent_tree et;
7004
402b4183 7005 trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len);
121a39bb 7006
2999d12f
TM		 7007 ocfs2_init_xattr_tree_extent_tree(&et,
7008 INODE_CACHE(args->reflink->new_inode),
7009 args->new_blk_bh);
7010
7011 ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno,
7012 len, &credits,
7013 &meta_ac, &data_ac);
7014 if (ret) {
7015 mlog_errno(ret);
7016 goto out;
7017 }
7018
7019 handle = ocfs2_start_trans(osb, credits);
7020 if (IS_ERR(handle)) {
7021 ret = PTR_ERR(handle);
7022 mlog_errno(ret);
7023 goto out;
7024 }
7025
121a39bb
TM		 7026 ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et,
7027 meta_ac, data_ac,
7028 blkno, cpos, len);
2999d12f
TM		 7029 if (ret)
7030 mlog_errno(ret);
7031
2999d12f
TM		 7032 ocfs2_commit_trans(osb, handle);
7033
7034out:
7035 if (meta_ac)
7036 ocfs2_free_alloc_context(meta_ac);
7037 if (data_ac)
7038 ocfs2_free_alloc_context(data_ac);
7039 return ret;
7040}
7041
7042/*
7043 * Create reflinked xattr buckets.
7044 * We will add bucket one by one, and refcount all the xattrs in the bucket
7045 * if they are stored outside.
7046 */
7047static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args,
7048 struct buffer_head *blk_bh,
7049 struct buffer_head *new_blk_bh)
7050{
7051 int ret;
7052 struct ocfs2_reflink_xattr_tree_args para;
7053
7054 memset(&para, 0, sizeof(para));
7055 para.reflink = args;
7056 para.old_blk_bh = blk_bh;
7057 para.new_blk_bh = new_blk_bh;
7058
7059 para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode);
7060 if (!para.old_bucket) {
7061 mlog_errno(-ENOMEM);
7062 return -ENOMEM;
7063 }
7064
7065 para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode);
7066 if (!para.new_bucket) {
7067 ret = -ENOMEM;
7068 mlog_errno(ret);
7069 goto out;
7070 }
7071
7072 ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh,
7073 ocfs2_reflink_xattr_rec,
7074 &para);
7075 if (ret)
7076 mlog_errno(ret);
7077
7078out:
7079 ocfs2_xattr_bucket_free(para.old_bucket);
7080 ocfs2_xattr_bucket_free(para.new_bucket);
7081 return ret;
7082}
7083
7084static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args,
7085 struct buffer_head *blk_bh)
7086{
7087 int ret, indexed = 0;
7088 struct buffer_head *new_blk_bh = NULL;
7089 struct ocfs2_xattr_block *xb =
7090 (struct ocfs2_xattr_block *)blk_bh->b_data;
7091
7092
7093 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)
7094 indexed = 1;
7095
7096 ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh,
7097 &new_blk_bh, indexed);
7098 if (ret) {
7099 mlog_errno(ret);
7100 goto out;
7101 }
7102
2decd65a 7103 if (!indexed)
2999d12f
TM		 7104 ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh);
7105 else
7106 ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh);
7107 if (ret)
7108 mlog_errno(ret);
7109
7110out:
7111 brelse(new_blk_bh);
7112 return ret;
7113}
7114
0fe9b66c
TM		 7115static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe)
7116{
7117 int type = ocfs2_xattr_get_type(xe);
7118
7119 return type != OCFS2_XATTR_INDEX_SECURITY &&
7120 type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS &&
7121 type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
7122}
7123
2999d12f
TM		 7124int ocfs2_reflink_xattrs(struct inode *old_inode,
7125 struct buffer_head *old_bh,
7126 struct inode *new_inode,
0fe9b66c
TM		 7127 struct buffer_head *new_bh,
7128 bool preserve_security)
2999d12f
TM		 7129{
7130 int ret;
7131 struct ocfs2_xattr_reflink args;
7132 struct ocfs2_inode_info *oi = OCFS2_I(old_inode);
7133 struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data;
7134 struct buffer_head *blk_bh = NULL;
7135 struct ocfs2_cached_dealloc_ctxt dealloc;
7136 struct ocfs2_refcount_tree *ref_tree;
7137 struct buffer_head *ref_root_bh = NULL;
7138
7139 ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb),
7140 le64_to_cpu(di->i_refcount_loc),
7141 1, &ref_tree, &ref_root_bh);
7142 if (ret) {
7143 mlog_errno(ret);
7144 goto out;
7145 }
7146
7147 ocfs2_init_dealloc_ctxt(&dealloc);
7148
7149 args.old_inode = old_inode;
7150 args.new_inode = new_inode;
7151 args.old_bh = old_bh;
7152 args.new_bh = new_bh;
7153 args.ref_ci = &ref_tree->rf_ci;
7154 args.ref_root_bh = ref_root_bh;
7155 args.dealloc = &dealloc;
0fe9b66c
TM		 7156 if (preserve_security)
7157 args.xattr_reflinked = NULL;
7158 else
7159 args.xattr_reflinked = ocfs2_reflink_xattr_no_security;
2999d12f
TM		 7160
7161 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
7162 ret = ocfs2_reflink_xattr_inline(&args);
7163 if (ret) {
7164 mlog_errno(ret);
7165 goto out_unlock;
7166 }
7167 }
7168
7169 if (!di->i_xattr_loc)
7170 goto out_unlock;
7171
7172 ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc),
7173 &blk_bh);
7174 if (ret < 0) {
7175 mlog_errno(ret);
7176 goto out_unlock;
7177 }
7178
7179 ret = ocfs2_reflink_xattr_in_block(&args, blk_bh);
7180 if (ret)
7181 mlog_errno(ret);
7182
7183 brelse(blk_bh);
7184
7185out_unlock:
7186 ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb),
7187 ref_tree, 1);
7188 brelse(ref_root_bh);
7189
7190 if (ocfs2_dealloc_has_cluster(&dealloc)) {
7191 ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1);
7192 ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc);
7193 }
7194
7195out:
7196 return ret;
7197}
7198
0fe9b66c
TM		 7199/*
7200 * Initialize security and acl for a already created inode.
7201 * Used for reflink a non-preserve-security file.
7202 *
7203 * It uses common api like ocfs2_xattr_set, so the caller
137cebf9 7204 * must not hold any lock expect i_rwsem.
0fe9b66c
TM		 7205 */
7206int ocfs2_init_security_and_acl(struct inode *dir,
2a7dba39 7207 struct inode *inode,
c25a1e06 7208 const struct qstr *qstr)
0fe9b66c 7209{
702e5bc6 7210 int ret = 0;
c25a1e06 7211 struct buffer_head *dir_bh = NULL;
0fe9b66c 7212
9d8f13ba 7213 ret = ocfs2_init_security_get(inode, dir, qstr, NULL);
32918dd9 7214 if (ret) {
0fe9b66c
TM		 7215 mlog_errno(ret);
7216 goto leave;
7217 }
7218
7219 ret = ocfs2_inode_lock(dir, &dir_bh, 0);
7220 if (ret) {
7221 mlog_errno(ret);
7222 goto leave;
7223 }
c25a1e06
JB		 7224 ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL);
7225 if (ret)
7226 mlog_errno(ret);
0fe9b66c
TM		 7227
7228 ocfs2_inode_unlock(dir, 0);
7229 brelse(dir_bh);
7230leave:
7231 return ret;
7232}
1046cb11 7233
923f7f31
TY		 7234/*
7235 * 'security' attributes support
7236 */
d9a82a04 7237static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
b296821a
AV		 7238 struct dentry *unused, struct inode *inode,
7239 const char *name, void *buffer, size_t size)
923f7f31 7240{
b296821a 7241 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY,
431547b3 7242 name, buffer, size);
923f7f31
TY		 7243}
7244
d9a82a04 7245static int ocfs2_xattr_security_set(const struct xattr_handler *handler,
39f60c1c 7246 struct mnt_idmap *idmap,
59301226
AV		 7247 struct dentry *unused, struct inode *inode,
7248 const char *name, const void *value,
7249 size_t size, int flags)
923f7f31 7250{
59301226 7251 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY,
431547b3 7252 name, value, size, flags);
923f7f31
TY		 7253}
7254
b519ea6d 7255static int ocfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
9d8f13ba
MZ		 7256 void *fs_info)
7257{
de3004c8 7258 struct ocfs2_security_xattr_info *si = fs_info;
9d8f13ba
MZ		 7259 const struct xattr *xattr;
7260 int err = 0;
7261
de3004c8
RS		 7262 if (si) {
7263 si->value = kmemdup(xattr_array->value, xattr_array->value_len,
7264 GFP_KERNEL);
7265 if (!si->value)
7266 return -ENOMEM;
7267
7268 si->name = xattr_array->name;
7269 si->value_len = xattr_array->value_len;
7270 return 0;
7271 }
7272
9d8f13ba
MZ		 7273 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
7274 err = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY,
7275 xattr->name, xattr->value,
7276 xattr->value_len, XATTR_CREATE);
7277 if (err)
7278 break;
7279 }
7280 return err;
7281}
7282
534eaddd
TY		 7283int ocfs2_init_security_get(struct inode *inode,
7284 struct inode *dir,
2a7dba39 7285 const struct qstr *qstr,
534eaddd
TY		 7286 struct ocfs2_security_xattr_info *si)
7287{
de3004c8
RS		 7288 int ret;
7289
38d59ef6
TY		 7290 /* check whether ocfs2 support feature xattr */
7291 if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb)))
7292 return -EOPNOTSUPP;
de3004c8
RS		 7293 if (si) {
7294 ret = security_inode_init_security(inode, dir, qstr,
7295 &ocfs2_initxattrs, si);
7296 /*
7297 * security_inode_init_security() does not return -EOPNOTSUPP,
7298 * we have to check the xattr ourselves.
7299 */
7300 if (!ret && !si->name)
7301 si->enable = 0;
7302
7303 return ret;
7304 }
9d8f13ba
MZ		 7305
7306 return security_inode_init_security(inode, dir, qstr,
7307 &ocfs2_initxattrs, NULL);
534eaddd
TY		 7308}
7309
7310int ocfs2_init_security_set(handle_t *handle,
7311 struct inode *inode,
7312 struct buffer_head *di_bh,
7313 struct ocfs2_security_xattr_info *si,
7314 struct ocfs2_alloc_context *xattr_ac,
7315 struct ocfs2_alloc_context *data_ac)
7316{
7317 return ocfs2_xattr_set_handle(handle, inode, di_bh,
7318 OCFS2_XATTR_INDEX_SECURITY,
7319 si->name, si->value, si->value_len, 0,
7320 xattr_ac, data_ac);
7321}
7322
537d81ca 7323const struct xattr_handler ocfs2_xattr_security_handler = {
923f7f31 7324 .prefix = XATTR_SECURITY_PREFIX,
923f7f31
TY		 7325 .get = ocfs2_xattr_security_get,
7326 .set = ocfs2_xattr_security_set,
7327};
7328
99219aea
MF		 7329/*
7330 * 'trusted' attributes support
7331 */
d9a82a04 7332static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
b296821a
AV		 7333 struct dentry *unused, struct inode *inode,
7334 const char *name, void *buffer, size_t size)
99219aea 7335{
b296821a 7336 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED,
431547b3 7337 name, buffer, size);
99219aea
MF		 7338}
7339
d9a82a04 7340static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler,
39f60c1c 7341 struct mnt_idmap *idmap,
59301226
AV		 7342 struct dentry *unused, struct inode *inode,
7343 const char *name, const void *value,
7344 size_t size, int flags)
99219aea 7345{
59301226 7346 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED,
431547b3 7347 name, value, size, flags);
99219aea
MF		 7348}
7349
537d81ca 7350const struct xattr_handler ocfs2_xattr_trusted_handler = {
99219aea 7351 .prefix = XATTR_TRUSTED_PREFIX,
99219aea
MF		 7352 .get = ocfs2_xattr_trusted_get,
7353 .set = ocfs2_xattr_trusted_set,
7354};
7355
99219aea
MF		 7356/*
7357 * 'user' attributes support
7358 */
d9a82a04 7359static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
84d86e6d 7360 struct dentry *unused, struct inode *inode,
b296821a 7361 const char *name, void *buffer, size_t size)
99219aea 7362{
b296821a 7363 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
99219aea 7364
99219aea
MF		 7365 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
7366 return -EOPNOTSUPP;
b296821a 7367 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
99219aea
MF		 7368 buffer, size);
7369}
7370
d9a82a04 7371static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
39f60c1c 7372 struct mnt_idmap *idmap,
59301226
AV		 7373 struct dentry *unused, struct inode *inode,
7374 const char *name, const void *value,
7375 size_t size, int flags)
99219aea 7376{
59301226 7377 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
99219aea 7378
99219aea
MF		 7379 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
7380 return -EOPNOTSUPP;
7381
59301226 7382 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER,
431547b3 7383 name, value, size, flags);
99219aea
MF		 7384}
7385
537d81ca 7386const struct xattr_handler ocfs2_xattr_user_handler = {
99219aea 7387 .prefix = XATTR_USER_PREFIX,
99219aea
MF		 7388 .get = ocfs2_xattr_user_get,
7389 .set = ocfs2_xattr_user_set,
7390};
Linux 6.x block layer and io_uring tree(s)