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Merge tag 'devicetree-for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh...
[linux-2.6-block.git] / fs / ocfs2 / xattr.c
CommitLineData
1802d0be 1// SPDX-License-Identifier: GPL-2.0-only
f56654c4
TM		 2/* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * xattr.c
6 *
c3cb6827 7 * Copyright (C) 2004, 2008 Oracle. All rights reserved.
f56654c4 8 *
cf1d6c76 9 * CREDITS:
c3cb6827
TY		 10 * Lots of code in this file is copy from linux/fs/ext3/xattr.c.
11 * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
f56654c4
TM		 12 */
13
cf1d6c76
TY		 14#include <linux/capability.h>
15#include <linux/fs.h>
16#include <linux/types.h>
17#include <linux/slab.h>
18#include <linux/highmem.h>
19#include <linux/pagemap.h>
20#include <linux/uio.h>
21#include <linux/sched.h>
22#include <linux/splice.h>
23#include <linux/mount.h>
24#include <linux/writeback.h>
25#include <linux/falloc.h>
01225596 26#include <linux/sort.h>
99219aea
MF		 27#include <linux/init.h>
28#include <linux/module.h>
29#include <linux/string.h>
923f7f31 30#include <linux/security.h>
cf1d6c76 31
f56654c4
TM		 32#include <cluster/masklog.h>
33
34#include "ocfs2.h"
35#include "alloc.h"
d6b32bbb 36#include "blockcheck.h"
f56654c4
TM		 37#include "dlmglue.h"
38#include "file.h"
cf1d6c76
TY		 39#include "symlink.h"
40#include "sysfile.h"
f56654c4
TM		 41#include "inode.h"
42#include "journal.h"
43#include "ocfs2_fs.h"
44#include "suballoc.h"
45#include "uptodate.h"
46#include "buffer_head_io.h"
0c044f0b 47#include "super.h"
cf1d6c76 48#include "xattr.h"
492a8a33 49#include "refcounttree.h"
0fe9b66c 50#include "acl.h"
402b4183 51#include "ocfs2_trace.h"
cf1d6c76
TY		 52
53struct ocfs2_xattr_def_value_root {
54 struct ocfs2_xattr_value_root xv;
55 struct ocfs2_extent_rec er;
56};
57
0c044f0b 58struct ocfs2_xattr_bucket {
ba937127
JB		 59 /* The inode these xattrs are associated with */
60 struct inode *bu_inode;
61
62 /* The actual buffers that make up the bucket */
4ac6032d 63 struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
ba937127
JB		 64
65 /* How many blocks make up one bucket for this filesystem */
66 int bu_blocks;
0c044f0b
TM		 67};
68
78f30c31 69struct ocfs2_xattr_set_ctxt {
85db90e7 70 handle_t *handle;
78f30c31
TM		 71 struct ocfs2_alloc_context *meta_ac;
72 struct ocfs2_alloc_context *data_ac;
73 struct ocfs2_cached_dealloc_ctxt dealloc;
5f5261ac 74 int set_abort;
78f30c31
TM		 75};
76
cf1d6c76
TY		 77#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
78#define OCFS2_XATTR_INLINE_SIZE 80
4442f518 79#define OCFS2_XATTR_HEADER_GAP 4
534eaddd
TY		 80#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
81 - sizeof(struct ocfs2_xattr_header) \
4442f518 82 - OCFS2_XATTR_HEADER_GAP)
89c38bd0
TY		 83#define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
84 - sizeof(struct ocfs2_xattr_block) \
85 - sizeof(struct ocfs2_xattr_header) \
4442f518 86 - OCFS2_XATTR_HEADER_GAP)
cf1d6c76
TY		 87
88static struct ocfs2_xattr_def_value_root def_xv = {
89 .xv.xr_list.l_count = cpu_to_le16(1),
90};
91
537d81ca 92const struct xattr_handler *ocfs2_xattr_handlers[] = {
cf1d6c76 93 &ocfs2_xattr_user_handler,
702e5bc6
CH		 94 &posix_acl_access_xattr_handler,
95 &posix_acl_default_xattr_handler,
cf1d6c76 96 &ocfs2_xattr_trusted_handler,
923f7f31 97 &ocfs2_xattr_security_handler,
cf1d6c76
TY		 98 NULL
99};
100
537d81ca 101static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
cf1d6c76 102 [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
929fb014 103 [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
702e5bc6 104 = &posix_acl_access_xattr_handler,
929fb014 105 [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
702e5bc6 106 = &posix_acl_default_xattr_handler,
cf1d6c76 107 [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
923f7f31 108 [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
cf1d6c76
TY		 109};
110
111struct ocfs2_xattr_info {
6b240ff6
JB		 112 int xi_name_index;
113 const char *xi_name;
18853b95 114 int xi_name_len;
6b240ff6
JB		 115 const void *xi_value;
116 size_t xi_value_len;
cf1d6c76
TY		 117};
118
119struct ocfs2_xattr_search {
120 struct buffer_head *inode_bh;
121 /*
122 * xattr_bh point to the block buffer head which has extended attribute
123 * when extended attribute in inode, xattr_bh is equal to inode_bh.
124 */
125 struct buffer_head *xattr_bh;
126 struct ocfs2_xattr_header *header;
ba937127 127 struct ocfs2_xattr_bucket *bucket;
cf1d6c76
TY		 128 void *base;
129 void *end;
130 struct ocfs2_xattr_entry *here;
131 int not_found;
132};
133
11179f2c
JB		 134/* Operations on struct ocfs2_xa_entry */
135struct ocfs2_xa_loc;
136struct ocfs2_xa_loc_operations {
cf2bc809
JB		 137 /*
138 * Journal functions
139 */
140 int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc,
141 int type);
142 void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc);
143
11179f2c
JB		 144 /*
145 * Return a pointer to the appropriate buffer in loc->xl_storage
146 * at the given offset from loc->xl_header.
147 */
148 void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset);
149
69a3e539
JB		 150 /* Can we reuse the existing entry for the new value? */
151 int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc,
152 struct ocfs2_xattr_info *xi);
153
154 /* How much space is needed for the new value? */
155 int (*xlo_check_space)(struct ocfs2_xa_loc *loc,
156 struct ocfs2_xattr_info *xi);
157
158 /*
159 * Return the offset of the first name+value pair. This is
160 * the start of our downward-filling free space.
161 */
162 int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc);
163
11179f2c
JB		 164 /*
165 * Remove the name+value at this location. Do whatever is
166 * appropriate with the remaining name+value pairs.
167 */
168 void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc);
69a3e539
JB		 169
170 /* Fill xl_entry with a new entry */
171 void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash);
172
173 /* Add name+value storage to an entry */
174 void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size);
3fc12afa
JB		 175
176 /*
177 * Initialize the value buf's access and bh fields for this entry.
178 * ocfs2_xa_fill_value_buf() will handle the xv pointer.
179 */
180 void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc,
181 struct ocfs2_xattr_value_buf *vb);
11179f2c
JB		 182};
183
184/*
185 * Describes an xattr entry location. This is a memory structure
186 * tracking the on-disk structure.
187 */
188struct ocfs2_xa_loc {
cf2bc809
JB		 189 /* This xattr belongs to this inode */
190 struct inode *xl_inode;
191
11179f2c
JB		 192 /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */
193 struct ocfs2_xattr_header *xl_header;
194
195 /* Bytes from xl_header to the end of the storage */
196 int xl_size;
197
198 /*
199 * The ocfs2_xattr_entry this location describes. If this is
200 * NULL, this location describes the on-disk structure where it
201 * would have been.
202 */
203 struct ocfs2_xattr_entry *xl_entry;
204
205 /*
206 * Internal housekeeping
207 */
208
209 /* Buffer(s) containing this entry */
210 void *xl_storage;
211
212 /* Operations on the storage backing this location */
213 const struct ocfs2_xa_loc_operations *xl_ops;
214};
215
199799a3
JB		 216/*
217 * Convenience functions to calculate how much space is needed for a
218 * given name+value pair
219 */
220static int namevalue_size(int name_len, uint64_t value_len)
221{
222 if (value_len > OCFS2_XATTR_INLINE_SIZE)
223 return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE;
224 else
225 return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len);
226}
227
228static int namevalue_size_xi(struct ocfs2_xattr_info *xi)
229{
230 return namevalue_size(xi->xi_name_len, xi->xi_value_len);
231}
232
233static int namevalue_size_xe(struct ocfs2_xattr_entry *xe)
234{
235 u64 value_len = le64_to_cpu(xe->xe_value_size);
236
237 BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) &&
238 ocfs2_xattr_is_local(xe));
239 return namevalue_size(xe->xe_name_len, value_len);
240}
241
242
fd68a894 243static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
589dc260
TM		 244 struct ocfs2_xattr_header *xh,
245 int index,
246 int *block_off,
247 int *new_offset);
248
54f443f4
JB		 249static int ocfs2_xattr_block_find(struct inode *inode,
250 int name_index,
251 const char *name,
252 struct ocfs2_xattr_search *xs);
589dc260
TM		 253static int ocfs2_xattr_index_block_find(struct inode *inode,
254 struct buffer_head *root_bh,
255 int name_index,
256 const char *name,
257 struct ocfs2_xattr_search *xs);
258
0c044f0b 259static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
47bca495 260 struct buffer_head *blk_bh,
0c044f0b
TM		 261 char *buffer,
262 size_t buffer_size);
263
01225596 264static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 265 struct ocfs2_xattr_search *xs,
266 struct ocfs2_xattr_set_ctxt *ctxt);
01225596
TM		 267
268static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
269 struct ocfs2_xattr_info *xi,
78f30c31
TM		 270 struct ocfs2_xattr_search *xs,
271 struct ocfs2_xattr_set_ctxt *ctxt);
01225596 272
47bca495
TM		 273typedef int (xattr_tree_rec_func)(struct inode *inode,
274 struct buffer_head *root_bh,
275 u64 blkno, u32 cpos, u32 len, void *para);
276static int ocfs2_iterate_xattr_index_block(struct inode *inode,
277 struct buffer_head *root_bh,
278 xattr_tree_rec_func *rec_func,
279 void *para);
280static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
281 struct ocfs2_xattr_bucket *bucket,
282 void *para);
283static int ocfs2_rm_xattr_cluster(struct inode *inode,
284 struct buffer_head *root_bh,
285 u64 blkno,
286 u32 cpos,
287 u32 len,
288 void *para);
289
c58b6032
JB		 290static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
291 u64 src_blk, u64 last_blk, u64 to_blk,
292 unsigned int start_bucket,
293 u32 *first_hash);
492a8a33
TM		 294static int ocfs2_prepare_refcount_xattr(struct inode *inode,
295 struct ocfs2_dinode *di,
296 struct ocfs2_xattr_info *xi,
297 struct ocfs2_xattr_search *xis,
298 struct ocfs2_xattr_search *xbs,
299 struct ocfs2_refcount_tree **ref_tree,
300 int *meta_need,
301 int *credits);
ce9c5a54
TM		 302static int ocfs2_get_xattr_tree_value_root(struct super_block *sb,
303 struct ocfs2_xattr_bucket *bucket,
304 int offset,
305 struct ocfs2_xattr_value_root **xv,
306 struct buffer_head **bh);
a3944256 307
0030e001
TY		 308static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb)
309{
310 return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE;
311}
312
313static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
314{
315 return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
316}
317
9c7759aa 318#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
51def39f 319#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
3e632946 320#define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
9c7759aa 321
ba937127 322static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode)
6dde41d9 323{
ba937127
JB		 324 struct ocfs2_xattr_bucket *bucket;
325 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
6dde41d9 326
ba937127
JB		 327 BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET);
328
329 bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS);
330 if (bucket) {
331 bucket->bu_inode = inode;
332 bucket->bu_blocks = blks;
333 }
334
335 return bucket;
336}
337
338static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket)
339{
340 int i;
341
342 for (i = 0; i < bucket->bu_blocks; i++) {
6dde41d9
JB		 343 brelse(bucket->bu_bhs[i]);
344 bucket->bu_bhs[i] = NULL;
345 }
346}
347
ba937127
JB		 348static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket)
349{
350 if (bucket) {
351 ocfs2_xattr_bucket_relse(bucket);
352 bucket->bu_inode = NULL;
353 kfree(bucket);
354 }
355}
356
784b816a
JB		 357/*
358 * A bucket that has never been written to disk doesn't need to be
359 * read. We just need the buffer_heads. Don't call this for
360 * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes
361 * them fully.
362 */
ba937127 363static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
9c339255 364 u64 xb_blkno, int new)
784b816a
JB		 365{
366 int i, rc = 0;
784b816a 367
ba937127
JB		 368 for (i = 0; i < bucket->bu_blocks; i++) {
369 bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb,
370 xb_blkno + i);
784b816a 371 if (!bucket->bu_bhs[i]) {
7391a294 372 rc = -ENOMEM;
784b816a
JB		 373 mlog_errno(rc);
374 break;
375 }
376
8cb471e8 377 if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
9c339255
WW		 378 bucket->bu_bhs[i])) {
379 if (new)
380 ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
381 bucket->bu_bhs[i]);
382 else {
383 set_buffer_uptodate(bucket->bu_bhs[i]);
384 ocfs2_set_buffer_uptodate(INODE_CACHE(bucket->bu_inode),
385 bucket->bu_bhs[i]);
386 }
387 }
784b816a
JB		 388 }
389
390 if (rc)
ba937127 391 ocfs2_xattr_bucket_relse(bucket);
784b816a
JB		 392 return rc;
393}
394
395/* Read the xattr bucket at xb_blkno */
ba937127 396static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket,
784b816a
JB		 397 u64 xb_blkno)
398{
ba937127 399 int rc;
784b816a 400
8cb471e8 401 rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno,
970e4936
JB		 402 bucket->bu_blocks, bucket->bu_bhs, 0,
403 NULL);
4d0e214e 404 if (!rc) {
c8b9cf9a 405 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e
JB		 406 rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb,
407 bucket->bu_bhs,
408 bucket->bu_blocks,
409 &bucket_xh(bucket)->xh_check);
c8b9cf9a 410 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e
JB		 411 if (rc)
412 mlog_errno(rc);
413 }
414
784b816a 415 if (rc)
ba937127 416 ocfs2_xattr_bucket_relse(bucket);
784b816a
JB		 417 return rc;
418}
419
1224be02 420static int ocfs2_xattr_bucket_journal_access(handle_t *handle,
1224be02
JB		 421 struct ocfs2_xattr_bucket *bucket,
422 int type)
423{
424 int i, rc = 0;
1224be02 425
ba937127 426 for (i = 0; i < bucket->bu_blocks; i++) {
0cf2f763
JB		 427 rc = ocfs2_journal_access(handle,
428 INODE_CACHE(bucket->bu_inode),
1224be02
JB		 429 bucket->bu_bhs[i], type);
430 if (rc) {
431 mlog_errno(rc);
432 break;
433 }
434 }
435
436 return rc;
437}
438
439static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle,
1224be02
JB		 440 struct ocfs2_xattr_bucket *bucket)
441{
ba937127 442 int i;
1224be02 443
c8b9cf9a 444 spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e
JB		 445 ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb,
446 bucket->bu_bhs, bucket->bu_blocks,
447 &bucket_xh(bucket)->xh_check);
c8b9cf9a 448 spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock);
4d0e214e 449
ba937127 450 for (i = 0; i < bucket->bu_blocks; i++)
1224be02
JB		 451 ocfs2_journal_dirty(handle, bucket->bu_bhs[i]);
452}
453
ba937127 454static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest,
4980c6da
JB		 455 struct ocfs2_xattr_bucket *src)
456{
457 int i;
ba937127
JB		 458 int blocksize = src->bu_inode->i_sb->s_blocksize;
459
460 BUG_ON(dest->bu_blocks != src->bu_blocks);
461 BUG_ON(dest->bu_inode != src->bu_inode);
4980c6da 462
ba937127 463 for (i = 0; i < src->bu_blocks; i++) {
4980c6da
JB		 464 memcpy(bucket_block(dest, i), bucket_block(src, i),
465 blocksize);
466 }
467}
1224be02 468
4ae1d69b
JB		 469static int ocfs2_validate_xattr_block(struct super_block *sb,
470 struct buffer_head *bh)
471{
d6b32bbb 472 int rc;
4ae1d69b
JB		 473 struct ocfs2_xattr_block *xb =
474 (struct ocfs2_xattr_block *)bh->b_data;
475
402b4183 476 trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr);
4ae1d69b 477
d6b32bbb
JB		 478 BUG_ON(!buffer_uptodate(bh));
479
480 /*
481 * If the ecc fails, we return the error but otherwise
482 * leave the filesystem running. We know any error is
483 * local to this block.
484 */
485 rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check);
486 if (rc)
487 return rc;
488
489 /*
490 * Errors after here are fatal
491 */
492
4ae1d69b 493 if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) {
17a5b9ab 494 return ocfs2_error(sb,
7ecef14a
JP		 495 "Extended attribute block #%llu has bad signature %.*s\n",
496 (unsigned long long)bh->b_blocknr, 7,
497 xb->xb_signature);
4ae1d69b
JB		 498 }
499
500 if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) {
17a5b9ab 501 return ocfs2_error(sb,
7ecef14a
JP		 502 "Extended attribute block #%llu has an invalid xb_blkno of %llu\n",
503 (unsigned long long)bh->b_blocknr,
504 (unsigned long long)le64_to_cpu(xb->xb_blkno));
4ae1d69b
JB		 505 }
506
507 if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) {
17a5b9ab 508 return ocfs2_error(sb,
7ecef14a
JP		 509 "Extended attribute block #%llu has an invalid xb_fs_generation of #%u\n",
510 (unsigned long long)bh->b_blocknr,
511 le32_to_cpu(xb->xb_fs_generation));
4ae1d69b
JB		 512 }
513
514 return 0;
515}
516
517static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno,
518 struct buffer_head **bh)
519{
520 int rc;
521 struct buffer_head *tmp = *bh;
522
8cb471e8 523 rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp,
970e4936 524 ocfs2_validate_xattr_block);
4ae1d69b
JB		 525
526 /* If ocfs2_read_block() got us a new bh, pass it up. */
527 if (!rc && !*bh)
528 *bh = tmp;
529
530 return rc;
531}
532
936b8834 533static inline const char *ocfs2_xattr_prefix(int name_index)
cf1d6c76 534{
537d81ca 535 const struct xattr_handler *handler = NULL;
cf1d6c76
TY		 536
537 if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
538 handler = ocfs2_xattr_handler_map[name_index];
98e9cb57 539 return handler ? xattr_prefix(handler) : NULL;
cf1d6c76
TY		 540}
541
40daa16a 542static u32 ocfs2_xattr_name_hash(struct inode *inode,
2057e5c6 543 const char *name,
40daa16a 544 int name_len)
cf1d6c76
TY		 545{
546 /* Get hash value of uuid from super block */
547 u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
548 int i;
549
cf1d6c76
TY		 550 /* hash extended attribute name */
551 for (i = 0; i < name_len; i++) {
552 hash = (hash << OCFS2_HASH_SHIFT) ^
553 (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
554 *name++;
555 }
556
557 return hash;
558}
559
534eaddd
TY		 560static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len)
561{
199799a3
JB		 562 return namevalue_size(name_len, value_len) +
563 sizeof(struct ocfs2_xattr_entry);
564}
534eaddd 565
199799a3
JB		 566static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi)
567{
568 return namevalue_size_xi(xi) +
569 sizeof(struct ocfs2_xattr_entry);
570}
534eaddd 571
199799a3
JB		 572static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe)
573{
574 return namevalue_size_xe(xe) +
575 sizeof(struct ocfs2_xattr_entry);
534eaddd
TY		 576}
577
578int ocfs2_calc_security_init(struct inode *dir,
579 struct ocfs2_security_xattr_info *si,
580 int *want_clusters,
581 int *xattr_credits,
582 struct ocfs2_alloc_context **xattr_ac)
583{
584 int ret = 0;
585 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
586 int s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
587 si->value_len);
588
589 /*
590 * The max space of security xattr taken inline is
591 * 256(name) + 80(value) + 16(entry) = 352 bytes,
592 * So reserve one metadata block for it is ok.
593 */
594 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
595 s_size > OCFS2_XATTR_FREE_IN_IBODY) {
596 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
597 if (ret) {
598 mlog_errno(ret);
599 return ret;
600 }
601 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
602 }
603
604 /* reserve clusters for xattr value which will be set in B tree*/
0e445b6f
TY		 605 if (si->value_len > OCFS2_XATTR_INLINE_SIZE) {
606 int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
607 si->value_len);
608
609 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
610 new_clusters);
611 *want_clusters += new_clusters;
612 }
534eaddd
TY		 613 return ret;
614}
615
89c38bd0
TY		 616int ocfs2_calc_xattr_init(struct inode *dir,
617 struct buffer_head *dir_bh,
67697cbd 618 umode_t mode,
89c38bd0
TY		 619 struct ocfs2_security_xattr_info *si,
620 int *want_clusters,
621 int *xattr_credits,
9b7895ef 622 int *want_meta)
89c38bd0
TY		 623{
624 int ret = 0;
625 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
0e445b6f 626 int s_size = 0, a_size = 0, acl_len = 0, new_clusters;
89c38bd0
TY		 627
628 if (si->enable)
629 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
630 si->value_len);
631
632 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
16c8d569 633 down_read(&OCFS2_I(dir)->ip_xattr_sem);
89c38bd0
TY		 634 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
635 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
636 "", NULL, 0);
16c8d569 637 up_read(&OCFS2_I(dir)->ip_xattr_sem);
89c38bd0
TY		 638 if (acl_len > 0) {
639 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
640 if (S_ISDIR(mode))
641 a_size <<= 1;
642 } else if (acl_len != 0 && acl_len != -ENODATA) {
c0a1a6d7 643 ret = acl_len;
89c38bd0
TY		 644 mlog_errno(ret);
645 return ret;
646 }
647 }
648
649 if (!(s_size + a_size))
650 return ret;
651
652 /*
653 * The max space of security xattr taken inline is
654 * 256(name) + 80(value) + 16(entry) = 352 bytes,
655 * The max space of acl xattr taken inline is
656 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
657 * when blocksize = 512, may reserve one more cluser for
658 * xattr bucket, otherwise reserve one metadata block
659 * for them is ok.
6c9fd1dc
TY		 660 * If this is a new directory with inline data,
661 * we choose to reserve the entire inline area for
662 * directory contents and force an external xattr block.
89c38bd0
TY		 663 */
664 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
6c9fd1dc 665 (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) ||
89c38bd0 666 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
9b7895ef 667 *want_meta = *want_meta + 1;
89c38bd0
TY		 668 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
669 }
670
671 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
672 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
673 *want_clusters += 1;
674 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
675 }
676
0e445b6f
TY		 677 /*
678 * reserve credits and clusters for xattrs which has large value
679 * and have to be set outside
680 */
681 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) {
682 new_clusters = ocfs2_clusters_for_bytes(dir->i_sb,
683 si->value_len);
684 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
685 new_clusters);
686 *want_clusters += new_clusters;
687 }
89c38bd0
TY		 688 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
689 acl_len > OCFS2_XATTR_INLINE_SIZE) {
0e445b6f
TY		 690 /* for directory, it has DEFAULT and ACCESS two types of acls */
691 new_clusters = (S_ISDIR(mode) ? 2 : 1) *
692 ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
693 *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb,
694 new_clusters);
695 *want_clusters += new_clusters;
89c38bd0
TY		 696 }
697
698 return ret;
699}
700
f56654c4
TM		 701static int ocfs2_xattr_extend_allocation(struct inode *inode,
702 u32 clusters_to_add,
19b801f4 703 struct ocfs2_xattr_value_buf *vb,
78f30c31 704 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4 705{
a78f9f46 706 int status = 0, credits;
85db90e7 707 handle_t *handle = ctxt->handle;
f56654c4 708 enum ocfs2_alloc_restarted why;
19b801f4 709 u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters);
f99b9b7c 710 struct ocfs2_extent_tree et;
f56654c4 711
5e404e9e 712 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
f99b9b7c 713
a78f9f46 714 while (clusters_to_add) {
402b4183
TM		 715 trace_ocfs2_xattr_extend_allocation(clusters_to_add);
716
a78f9f46
TM		 717 status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
718 OCFS2_JOURNAL_ACCESS_WRITE);
719 if (status < 0) {
720 mlog_errno(status);
721 break;
722 }
f56654c4 723
a78f9f46
TM		 724 prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
725 status = ocfs2_add_clusters_in_btree(handle,
726 &et,
727 &logical_start,
728 clusters_to_add,
729 0,
730 ctxt->data_ac,
731 ctxt->meta_ac,
732 &why);
733 if ((status < 0) && (status != -EAGAIN)) {
734 if (status != -ENOSPC)
735 mlog_errno(status);
736 break;
737 }
f56654c4 738
a78f9f46
TM		 739 ocfs2_journal_dirty(handle, vb->vb_bh);
740
741 clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) -
742 prev_clusters;
743
744 if (why != RESTART_NONE && clusters_to_add) {
745 /*
746 * We can only fail in case the alloc file doesn't give
747 * up enough clusters.
748 */
749 BUG_ON(why == RESTART_META);
750
a78f9f46 751 credits = ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 752 &vb->vb_xv->xr_list);
a78f9f46
TM		 753 status = ocfs2_extend_trans(handle, credits);
754 if (status < 0) {
755 status = -ENOMEM;
756 mlog_errno(status);
757 break;
758 }
759 }
760 }
f56654c4
TM		 761
762 return status;
763}
764
765static int __ocfs2_remove_xattr_range(struct inode *inode,
d72cc72d 766 struct ocfs2_xattr_value_buf *vb,
f56654c4 767 u32 cpos, u32 phys_cpos, u32 len,
492a8a33 768 unsigned int ext_flags,
78f30c31 769 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 770{
771 int ret;
772 u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
85db90e7 773 handle_t *handle = ctxt->handle;
f99b9b7c
JB		 774 struct ocfs2_extent_tree et;
775
5e404e9e 776 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
f56654c4 777
0cf2f763 778 ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh,
d72cc72d 779 OCFS2_JOURNAL_ACCESS_WRITE);
f56654c4
TM		 780 if (ret) {
781 mlog_errno(ret);
85db90e7 782 goto out;
f56654c4
TM		 783 }
784
dbdcf6a4 785 ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac,
78f30c31 786 &ctxt->dealloc);
f56654c4
TM		 787 if (ret) {
788 mlog_errno(ret);
85db90e7 789 goto out;
f56654c4
TM		 790 }
791
d72cc72d 792 le32_add_cpu(&vb->vb_xv->xr_clusters, -len);
ec20cec7 793 ocfs2_journal_dirty(handle, vb->vb_bh);
f56654c4 794
492a8a33
TM		 795 if (ext_flags & OCFS2_EXT_REFCOUNTED)
796 ret = ocfs2_decrease_refcount(inode, handle,
797 ocfs2_blocks_to_clusters(inode->i_sb,
798 phys_blkno),
799 len, ctxt->meta_ac, &ctxt->dealloc, 1);
800 else
801 ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc,
802 phys_blkno, len);
f56654c4
TM		 803 if (ret)
804 mlog_errno(ret);
805
f56654c4 806out:
f56654c4
TM		 807 return ret;
808}
809
810static int ocfs2_xattr_shrink_size(struct inode *inode,
811 u32 old_clusters,
812 u32 new_clusters,
19b801f4 813 struct ocfs2_xattr_value_buf *vb,
78f30c31 814 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 815{
816 int ret = 0;
492a8a33 817 unsigned int ext_flags;
f56654c4
TM		 818 u32 trunc_len, cpos, phys_cpos, alloc_size;
819 u64 block;
f56654c4
TM		 820
821 if (old_clusters <= new_clusters)
822 return 0;
823
824 cpos = new_clusters;
825 trunc_len = old_clusters - new_clusters;
826 while (trunc_len) {
827 ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
d72cc72d 828 &alloc_size,
492a8a33 829 &vb->vb_xv->xr_list, &ext_flags);
f56654c4
TM		 830 if (ret) {
831 mlog_errno(ret);
832 goto out;
833 }
834
835 if (alloc_size > trunc_len)
836 alloc_size = trunc_len;
837
19b801f4 838 ret = __ocfs2_remove_xattr_range(inode, vb, cpos,
f56654c4 839 phys_cpos, alloc_size,
492a8a33 840 ext_flags, ctxt);
f56654c4
TM		 841 if (ret) {
842 mlog_errno(ret);
843 goto out;
844 }
845
846 block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
8cb471e8
JB		 847 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode),
848 block, alloc_size);
f56654c4
TM		 849 cpos += alloc_size;
850 trunc_len -= alloc_size;
851 }
852
853out:
f56654c4
TM		 854 return ret;
855}
856
857static int ocfs2_xattr_value_truncate(struct inode *inode,
b3e5d379 858 struct ocfs2_xattr_value_buf *vb,
78f30c31
TM		 859 int len,
860 struct ocfs2_xattr_set_ctxt *ctxt)
f56654c4
TM		 861{
862 int ret;
863 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
b3e5d379 864 u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters);
f56654c4
TM		 865
866 if (new_clusters == old_clusters)
867 return 0;
868
869 if (new_clusters > old_clusters)
870 ret = ocfs2_xattr_extend_allocation(inode,
871 new_clusters - old_clusters,
b3e5d379 872 vb, ctxt);
f56654c4
TM		 873 else
874 ret = ocfs2_xattr_shrink_size(inode,
875 old_clusters, new_clusters,
b3e5d379 876 vb, ctxt);
f56654c4
TM		 877
878 return ret;
879}
cf1d6c76 880
1046cb11
AG		 881static int ocfs2_xattr_list_entry(struct super_block *sb,
882 char *buffer, size_t size,
883 size_t *result, int type,
936b8834
TM		 884 const char *name, int name_len)
885{
886 char *p = buffer + *result;
1046cb11
AG		 887 const char *prefix;
888 int prefix_len;
889 int total_len;
936b8834 890
1046cb11
AG		 891 switch(type) {
892 case OCFS2_XATTR_INDEX_USER:
893 if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
894 return 0;
895 break;
896
897 case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
898 case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
1751e8a6 899 if (!(sb->s_flags & SB_POSIXACL))
1046cb11
AG		 900 return 0;
901 break;
902
903 case OCFS2_XATTR_INDEX_TRUSTED:
904 if (!capable(CAP_SYS_ADMIN))
905 return 0;
906 break;
907 }
908
909 prefix = ocfs2_xattr_prefix(type);
910 if (!prefix)
911 return 0;
912 prefix_len = strlen(prefix);
913 total_len = prefix_len + name_len + 1;
936b8834
TM		 914 *result += total_len;
915
916 /* we are just looking for how big our buffer needs to be */
917 if (!size)
918 return 0;
919
920 if (*result > size)
921 return -ERANGE;
922
923 memcpy(p, prefix, prefix_len);
924 memcpy(p + prefix_len, name, name_len);
925 p[prefix_len + name_len] = '\0';
926
927 return 0;
928}
929
cf1d6c76
TY		 930static int ocfs2_xattr_list_entries(struct inode *inode,
931 struct ocfs2_xattr_header *header,
932 char *buffer, size_t buffer_size)
933{
936b8834
TM		 934 size_t result = 0;
935 int i, type, ret;
1046cb11 936 const char *name;
cf1d6c76
TY		 937
938 for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
939 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
936b8834 940 type = ocfs2_xattr_get_type(entry);
1046cb11
AG		 941 name = (const char *)header +
942 le16_to_cpu(entry->xe_name_offset);
936b8834 943
1046cb11
AG		 944 ret = ocfs2_xattr_list_entry(inode->i_sb,
945 buffer, buffer_size,
946 &result, type, name,
947 entry->xe_name_len);
948 if (ret)
949 return ret;
cf1d6c76
TY		 950 }
951
936b8834 952 return result;
cf1d6c76
TY		 953}
954
8b2c0dba
TM		 955int ocfs2_has_inline_xattr_value_outside(struct inode *inode,
956 struct ocfs2_dinode *di)
957{
958 struct ocfs2_xattr_header *xh;
959 int i;
960
961 xh = (struct ocfs2_xattr_header *)
962 ((void *)di + inode->i_sb->s_blocksize -
963 le16_to_cpu(di->i_xattr_inline_size));
964
965 for (i = 0; i < le16_to_cpu(xh->xh_count); i++)
966 if (!ocfs2_xattr_is_local(&xh->xh_entries[i]))
967 return 1;
968
969 return 0;
970}
971
cf1d6c76
TY		 972static int ocfs2_xattr_ibody_list(struct inode *inode,
973 struct ocfs2_dinode *di,
974 char *buffer,
975 size_t buffer_size)
976{
977 struct ocfs2_xattr_header *header = NULL;
978 struct ocfs2_inode_info *oi = OCFS2_I(inode);
979 int ret = 0;
980
981 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
982 return ret;
983
984 header = (struct ocfs2_xattr_header *)
985 ((void *)di + inode->i_sb->s_blocksize -
986 le16_to_cpu(di->i_xattr_inline_size));
987
988 ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size);
989
990 return ret;
991}
992
993static int ocfs2_xattr_block_list(struct inode *inode,
994 struct ocfs2_dinode *di,
995 char *buffer,
996 size_t buffer_size)
997{
998 struct buffer_head *blk_bh = NULL;
0c044f0b 999 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 1000 int ret = 0;
1001
1002 if (!di->i_xattr_loc)
1003 return ret;
1004
4ae1d69b
JB		 1005 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
1006 &blk_bh);
cf1d6c76
TY		 1007 if (ret < 0) {
1008 mlog_errno(ret);
1009 return ret;
1010 }
cf1d6c76 1011
0c044f0b 1012 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
0c044f0b
TM		 1013 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
1014 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
1015 ret = ocfs2_xattr_list_entries(inode, header,
1016 buffer, buffer_size);
47bca495
TM		 1017 } else
1018 ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh,
0c044f0b 1019 buffer, buffer_size);
4ae1d69b 1020
cf1d6c76
TY		 1021 brelse(blk_bh);
1022
1023 return ret;
1024}
1025
1026ssize_t ocfs2_listxattr(struct dentry *dentry,
1027 char *buffer,
1028 size_t size)
1029{
1030 int ret = 0, i_ret = 0, b_ret = 0;
1031 struct buffer_head *di_bh = NULL;
1032 struct ocfs2_dinode *di = NULL;
2b0143b5 1033 struct ocfs2_inode_info *oi = OCFS2_I(d_inode(dentry));
cf1d6c76 1034
8154da3d
TY		 1035 if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb)))
1036 return -EOPNOTSUPP;
1037
cf1d6c76
TY		 1038 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
1039 return ret;
1040
2b0143b5 1041 ret = ocfs2_inode_lock(d_inode(dentry), &di_bh, 0);
cf1d6c76
TY		 1042 if (ret < 0) {
1043 mlog_errno(ret);
1044 return ret;
1045 }
1046
1047 di = (struct ocfs2_dinode *)di_bh->b_data;
1048
1049 down_read(&oi->ip_xattr_sem);
2b0143b5 1050 i_ret = ocfs2_xattr_ibody_list(d_inode(dentry), di, buffer, size);
cf1d6c76
TY		 1051 if (i_ret < 0)
1052 b_ret = 0;
1053 else {
1054 if (buffer) {
1055 buffer += i_ret;
1056 size -= i_ret;
1057 }
2b0143b5 1058 b_ret = ocfs2_xattr_block_list(d_inode(dentry), di,
cf1d6c76
TY		 1059 buffer, size);
1060 if (b_ret < 0)
1061 i_ret = 0;
1062 }
1063 up_read(&oi->ip_xattr_sem);
2b0143b5 1064 ocfs2_inode_unlock(d_inode(dentry), 0);
cf1d6c76
TY		 1065
1066 brelse(di_bh);
1067
1068 return i_ret + b_ret;
1069}
1070
1071static int ocfs2_xattr_find_entry(int name_index,
1072 const char *name,
1073 struct ocfs2_xattr_search *xs)
1074{
1075 struct ocfs2_xattr_entry *entry;
1076 size_t name_len;
1077 int i, cmp = 1;
1078
1079 if (name == NULL)
1080 return -EINVAL;
1081
1082 name_len = strlen(name);
1083 entry = xs->here;
1084 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
1085 cmp = name_index - ocfs2_xattr_get_type(entry);
1086 if (!cmp)
1087 cmp = name_len - entry->xe_name_len;
1088 if (!cmp)
1089 cmp = memcmp(name, (xs->base +
1090 le16_to_cpu(entry->xe_name_offset)),
1091 name_len);
1092 if (cmp == 0)
1093 break;
1094 entry += 1;
1095 }
1096 xs->here = entry;
1097
1098 return cmp ? -ENODATA : 0;
1099}
1100
1101static int ocfs2_xattr_get_value_outside(struct inode *inode,
589dc260 1102 struct ocfs2_xattr_value_root *xv,
cf1d6c76
TY		 1103 void *buffer,
1104 size_t len)
1105{
1106 u32 cpos, p_cluster, num_clusters, bpc, clusters;
1107 u64 blkno;
1108 int i, ret = 0;
1109 size_t cplen, blocksize;
1110 struct buffer_head *bh = NULL;
cf1d6c76
TY		 1111 struct ocfs2_extent_list *el;
1112
cf1d6c76
TY		 1113 el = &xv->xr_list;
1114 clusters = le32_to_cpu(xv->xr_clusters);
1115 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1116 blocksize = inode->i_sb->s_blocksize;
1117
1118 cpos = 0;
1119 while (cpos < clusters) {
1120 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1061f9c1 1121 &num_clusters, el, NULL);
cf1d6c76
TY		 1122 if (ret) {
1123 mlog_errno(ret);
1124 goto out;
1125 }
1126
1127 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1128 /* Copy ocfs2_xattr_value */
1129 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
8cb471e8
JB		 1130 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1131 &bh, NULL);
cf1d6c76
TY		 1132 if (ret) {
1133 mlog_errno(ret);
1134 goto out;
1135 }
1136
1137 cplen = len >= blocksize ? blocksize : len;
1138 memcpy(buffer, bh->b_data, cplen);
1139 len -= cplen;
1140 buffer += cplen;
1141
1142 brelse(bh);
1143 bh = NULL;
1144 if (len == 0)
1145 break;
1146 }
1147 cpos += num_clusters;
1148 }
1149out:
1150 return ret;
1151}
1152
1153static int ocfs2_xattr_ibody_get(struct inode *inode,
1154 int name_index,
1155 const char *name,
1156 void *buffer,
1157 size_t buffer_size,
1158 struct ocfs2_xattr_search *xs)
1159{
1160 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1161 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
589dc260 1162 struct ocfs2_xattr_value_root *xv;
cf1d6c76
TY		 1163 size_t size;
1164 int ret = 0;
1165
1166 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL))
1167 return -ENODATA;
1168
1169 xs->end = (void *)di + inode->i_sb->s_blocksize;
1170 xs->header = (struct ocfs2_xattr_header *)
1171 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
1172 xs->base = (void *)xs->header;
1173 xs->here = xs->header->xh_entries;
1174
1175 ret = ocfs2_xattr_find_entry(name_index, name, xs);
1176 if (ret)
1177 return ret;
1178 size = le64_to_cpu(xs->here->xe_value_size);
1179 if (buffer) {
1180 if (size > buffer_size)
1181 return -ERANGE;
1182 if (ocfs2_xattr_is_local(xs->here)) {
1183 memcpy(buffer, (void *)xs->base +
1184 le16_to_cpu(xs->here->xe_name_offset) +
1185 OCFS2_XATTR_SIZE(xs->here->xe_name_len), size);
1186 } else {
589dc260
TM		 1187 xv = (struct ocfs2_xattr_value_root *)
1188 (xs->base + le16_to_cpu(
1189 xs->here->xe_name_offset) +
1190 OCFS2_XATTR_SIZE(xs->here->xe_name_len));
1191 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1192 buffer, size);
1193 if (ret < 0) {
1194 mlog_errno(ret);
1195 return ret;
1196 }
1197 }
1198 }
1199
1200 return size;
1201}
1202
1203static int ocfs2_xattr_block_get(struct inode *inode,
1204 int name_index,
1205 const char *name,
1206 void *buffer,
1207 size_t buffer_size,
1208 struct ocfs2_xattr_search *xs)
1209{
cf1d6c76 1210 struct ocfs2_xattr_block *xb;
589dc260 1211 struct ocfs2_xattr_value_root *xv;
cf1d6c76 1212 size_t size;
44d8e4e1
SM		 1213 int ret = -ENODATA, name_offset, name_len, i;
1214 int uninitialized_var(block_off);
cf1d6c76 1215
ba937127
JB		 1216 xs->bucket = ocfs2_xattr_bucket_new(inode);
1217 if (!xs->bucket) {
1218 ret = -ENOMEM;
1219 mlog_errno(ret);
1220 goto cleanup;
1221 }
589dc260 1222
54f443f4
JB		 1223 ret = ocfs2_xattr_block_find(inode, name_index, name, xs);
1224 if (ret) {
cf1d6c76 1225 mlog_errno(ret);
cf1d6c76
TY		 1226 goto cleanup;
1227 }
1228
6c1e183e
TY		 1229 if (xs->not_found) {
1230 ret = -ENODATA;
1231 goto cleanup;
1232 }
1233
54f443f4 1234 xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 1235 size = le64_to_cpu(xs->here->xe_value_size);
1236 if (buffer) {
1237 ret = -ERANGE;
1238 if (size > buffer_size)
1239 goto cleanup;
589dc260
TM		 1240
1241 name_offset = le16_to_cpu(xs->here->xe_name_offset);
1242 name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len);
1243 i = xs->here - xs->header->xh_entries;
1244
1245 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
fd68a894 1246 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
ba937127 1247 bucket_xh(xs->bucket),
589dc260
TM		 1248 i,
1249 &block_off,
1250 &name_offset);
023d4ea3
JQ		 1251 if (ret) {
1252 mlog_errno(ret);
1253 goto cleanup;
1254 }
ba937127 1255 xs->base = bucket_block(xs->bucket, block_off);
589dc260 1256 }
cf1d6c76
TY		 1257 if (ocfs2_xattr_is_local(xs->here)) {
1258 memcpy(buffer, (void *)xs->base +
589dc260 1259 name_offset + name_len, size);
cf1d6c76 1260 } else {
589dc260
TM		 1261 xv = (struct ocfs2_xattr_value_root *)
1262 (xs->base + name_offset + name_len);
1263 ret = ocfs2_xattr_get_value_outside(inode, xv,
cf1d6c76
TY		 1264 buffer, size);
1265 if (ret < 0) {
1266 mlog_errno(ret);
1267 goto cleanup;
1268 }
1269 }
1270 }
1271 ret = size;
1272cleanup:
ba937127 1273 ocfs2_xattr_bucket_free(xs->bucket);
cf1d6c76 1274
54f443f4
JB		 1275 brelse(xs->xattr_bh);
1276 xs->xattr_bh = NULL;
cf1d6c76
TY		 1277 return ret;
1278}
1279
4e3e9d02
TY		 1280int ocfs2_xattr_get_nolock(struct inode *inode,
1281 struct buffer_head *di_bh,
0030e001
TY		 1282 int name_index,
1283 const char *name,
1284 void *buffer,
1285 size_t buffer_size)
cf1d6c76
TY		 1286{
1287 int ret;
1288 struct ocfs2_dinode *di = NULL;
cf1d6c76
TY		 1289 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1290 struct ocfs2_xattr_search xis = {
1291 .not_found = -ENODATA,
1292 };
1293 struct ocfs2_xattr_search xbs = {
1294 .not_found = -ENODATA,
1295 };
1296
8154da3d
TY		 1297 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
1298 return -EOPNOTSUPP;
1299
cf1d6c76 1300 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
2b693005 1301 return -ENODATA;
cf1d6c76 1302
cf1d6c76
TY		 1303 xis.inode_bh = xbs.inode_bh = di_bh;
1304 di = (struct ocfs2_dinode *)di_bh->b_data;
1305
cf1d6c76
TY		 1306 ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer,
1307 buffer_size, &xis);
6c1e183e 1308 if (ret == -ENODATA && di->i_xattr_loc)
cf1d6c76
TY		 1309 ret = ocfs2_xattr_block_get(inode, name_index, name, buffer,
1310 buffer_size, &xbs);
4e3e9d02
TY		 1311
1312 return ret;
1313}
1314
1315/* ocfs2_xattr_get()
1316 *
1317 * Copy an extended attribute into the buffer provided.
1318 * Buffer is NULL to compute the size of buffer required.
1319 */
1320static int ocfs2_xattr_get(struct inode *inode,
1321 int name_index,
1322 const char *name,
1323 void *buffer,
1324 size_t buffer_size)
1325{
8818efaa 1326 int ret, had_lock;
4e3e9d02 1327 struct buffer_head *di_bh = NULL;
8818efaa 1328 struct ocfs2_lock_holder oh;
4e3e9d02 1329
8818efaa
ER		 1330 had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh);
1331 if (had_lock < 0) {
1332 mlog_errno(had_lock);
1333 return had_lock;
4e3e9d02 1334 }
5e64b0d9 1335 down_read(&OCFS2_I(inode)->ip_xattr_sem);
4e3e9d02
TY		 1336 ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index,
1337 name, buffer, buffer_size);
5e64b0d9 1338 up_read(&OCFS2_I(inode)->ip_xattr_sem);
4e3e9d02 1339
8818efaa 1340 ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock);
cf1d6c76
TY		 1341
1342 brelse(di_bh);
1343
1344 return ret;
1345}
1346
1347static int __ocfs2_xattr_set_value_outside(struct inode *inode,
85db90e7 1348 handle_t *handle,
492a8a33 1349 struct ocfs2_xattr_value_buf *vb,
cf1d6c76
TY		 1350 const void *value,
1351 int value_len)
1352{
71d548a6 1353 int ret = 0, i, cp_len;
cf1d6c76
TY		 1354 u16 blocksize = inode->i_sb->s_blocksize;
1355 u32 p_cluster, num_clusters;
1356 u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
1357 u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len);
1358 u64 blkno;
1359 struct buffer_head *bh = NULL;
492a8a33
TM		 1360 unsigned int ext_flags;
1361 struct ocfs2_xattr_value_root *xv = vb->vb_xv;
cf1d6c76
TY		 1362
1363 BUG_ON(clusters > le32_to_cpu(xv->xr_clusters));
1364
cf1d6c76
TY		 1365 while (cpos < clusters) {
1366 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
1061f9c1 1367 &num_clusters, &xv->xr_list,
492a8a33 1368 &ext_flags);
cf1d6c76
TY		 1369 if (ret) {
1370 mlog_errno(ret);
85db90e7 1371 goto out;
cf1d6c76
TY		 1372 }
1373
492a8a33
TM		 1374 BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED);
1375
cf1d6c76
TY		 1376 blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
1377
1378 for (i = 0; i < num_clusters * bpc; i++, blkno++) {
8cb471e8
JB		 1379 ret = ocfs2_read_block(INODE_CACHE(inode), blkno,
1380 &bh, NULL);
cf1d6c76
TY		 1381 if (ret) {
1382 mlog_errno(ret);
85db90e7 1383 goto out;
cf1d6c76
TY		 1384 }
1385
1386 ret = ocfs2_journal_access(handle,
0cf2f763 1387 INODE_CACHE(inode),
cf1d6c76
TY		 1388 bh,
1389 OCFS2_JOURNAL_ACCESS_WRITE);
1390 if (ret < 0) {
1391 mlog_errno(ret);
85db90e7 1392 goto out;
cf1d6c76
TY		 1393 }
1394
1395 cp_len = value_len > blocksize ? blocksize : value_len;
1396 memcpy(bh->b_data, value, cp_len);
1397 value_len -= cp_len;
1398 value += cp_len;
1399 if (cp_len < blocksize)
1400 memset(bh->b_data + cp_len, 0,
1401 blocksize - cp_len);
1402
ec20cec7 1403 ocfs2_journal_dirty(handle, bh);
cf1d6c76
TY		 1404 brelse(bh);
1405 bh = NULL;
1406
1407 /*
1408 * XXX: do we need to empty all the following
1409 * blocks in this cluster?
1410 */
1411 if (!value_len)
1412 break;
1413 }
1414 cpos += num_clusters;
1415 }
cf1d6c76
TY		 1416out:
1417 brelse(bh);
1418
1419 return ret;
1420}
1421
69a3e539
JB		 1422static int ocfs2_xa_check_space_helper(int needed_space, int free_start,
1423 int num_entries)
1424{
1425 int free_space;
1426
1427 if (!needed_space)
1428 return 0;
1429
1430 free_space = free_start -
1431 sizeof(struct ocfs2_xattr_header) -
1432 (num_entries * sizeof(struct ocfs2_xattr_entry)) -
1433 OCFS2_XATTR_HEADER_GAP;
1434 if (free_space < 0)
1435 return -EIO;
1436 if (free_space < needed_space)
1437 return -ENOSPC;
1438
1439 return 0;
1440}
1441
cf2bc809
JB		 1442static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc,
1443 int type)
1444{
1445 return loc->xl_ops->xlo_journal_access(handle, loc, type);
1446}
1447
1448static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc)
1449{
1450 loc->xl_ops->xlo_journal_dirty(handle, loc);
1451}
1452
69a3e539
JB		 1453/* Give a pointer into the storage for the given offset */
1454static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset)
1455{
1456 BUG_ON(offset >= loc->xl_size);
1457 return loc->xl_ops->xlo_offset_pointer(loc, offset);
1458}
1459
11179f2c
JB		 1460/*
1461 * Wipe the name+value pair and allow the storage to reclaim it. This
1462 * must be followed by either removal of the entry or a call to
1463 * ocfs2_xa_add_namevalue().
1464 */
1465static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc)
1466{
1467 loc->xl_ops->xlo_wipe_namevalue(loc);
1468}
1469
69a3e539
JB		 1470/*
1471 * Find lowest offset to a name+value pair. This is the start of our
1472 * downward-growing free space.
1473 */
1474static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc)
1475{
1476 return loc->xl_ops->xlo_get_free_start(loc);
1477}
1478
1479/* Can we reuse loc->xl_entry for xi? */
1480static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc,
1481 struct ocfs2_xattr_info *xi)
1482{
1483 return loc->xl_ops->xlo_can_reuse(loc, xi);
1484}
1485
1486/* How much free space is needed to set the new value */
1487static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc,
1488 struct ocfs2_xattr_info *xi)
1489{
1490 return loc->xl_ops->xlo_check_space(loc, xi);
1491}
1492
1493static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1494{
1495 loc->xl_ops->xlo_add_entry(loc, name_hash);
1496 loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash);
1497 /*
1498 * We can't leave the new entry's xe_name_offset at zero or
1499 * add_namevalue() will go nuts. We set it to the size of our
1500 * storage so that it can never be less than any other entry.
1501 */
1502 loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size);
1503}
1504
1505static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc,
1506 struct ocfs2_xattr_info *xi)
1507{
1508 int size = namevalue_size_xi(xi);
1509 int nameval_offset;
1510 char *nameval_buf;
1511
1512 loc->xl_ops->xlo_add_namevalue(loc, size);
1513 loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
1514 loc->xl_entry->xe_name_len = xi->xi_name_len;
1515 ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index);
1516 ocfs2_xattr_set_local(loc->xl_entry,
1517 xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE);
1518
1519 nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1520 nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
1521 memset(nameval_buf, 0, size);
1522 memcpy(nameval_buf, xi->xi_name, xi->xi_name_len);
1523}
1524
3fc12afa
JB		 1525static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc,
1526 struct ocfs2_xattr_value_buf *vb)
1527{
1528 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1529 int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
1530
1531 /* Value bufs are for value trees */
73857ee0 1532 BUG_ON(ocfs2_xattr_is_local(loc->xl_entry));
3fc12afa
JB		 1533 BUG_ON(namevalue_size_xe(loc->xl_entry) !=
1534 (name_size + OCFS2_XATTR_ROOT_SIZE));
1535
1536 loc->xl_ops->xlo_fill_value_buf(loc, vb);
1537 vb->vb_xv =
1538 (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc,
1539 nameval_offset +
1540 name_size);
1541}
1542
cf2bc809
JB		 1543static int ocfs2_xa_block_journal_access(handle_t *handle,
1544 struct ocfs2_xa_loc *loc, int type)
1545{
1546 struct buffer_head *bh = loc->xl_storage;
1547 ocfs2_journal_access_func access;
1548
1549 if (loc->xl_size == (bh->b_size -
1550 offsetof(struct ocfs2_xattr_block,
1551 xb_attrs.xb_header)))
1552 access = ocfs2_journal_access_xb;
1553 else
1554 access = ocfs2_journal_access_di;
1555 return access(handle, INODE_CACHE(loc->xl_inode), bh, type);
1556}
1557
1558static void ocfs2_xa_block_journal_dirty(handle_t *handle,
1559 struct ocfs2_xa_loc *loc)
1560{
1561 struct buffer_head *bh = loc->xl_storage;
1562
1563 ocfs2_journal_dirty(handle, bh);
1564}
1565
11179f2c
JB		 1566static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc,
1567 int offset)
1568{
11179f2c
JB		 1569 return (char *)loc->xl_header + offset;
1570}
1571
69a3e539
JB		 1572static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc,
1573 struct ocfs2_xattr_info *xi)
1574{
1575 /*
1576 * Block storage is strict. If the sizes aren't exact, we will
1577 * remove the old one and reinsert the new.
1578 */
1579 return namevalue_size_xe(loc->xl_entry) ==
1580 namevalue_size_xi(xi);
1581}
1582
1583static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc)
1584{
1585 struct ocfs2_xattr_header *xh = loc->xl_header;
1586 int i, count = le16_to_cpu(xh->xh_count);
1587 int offset, free_start = loc->xl_size;
1588
1589 for (i = 0; i < count; i++) {
1590 offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
1591 if (offset < free_start)
1592 free_start = offset;
1593 }
1594
1595 return free_start;
1596}
1597
1598static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc,
1599 struct ocfs2_xattr_info *xi)
1600{
1601 int count = le16_to_cpu(loc->xl_header->xh_count);
1602 int free_start = ocfs2_xa_get_free_start(loc);
1603 int needed_space = ocfs2_xi_entry_usage(xi);
1604
1605 /*
1606 * Block storage will reclaim the original entry before inserting
1607 * the new value, so we only need the difference. If the new
1608 * entry is smaller than the old one, we don't need anything.
1609 */
1610 if (loc->xl_entry) {
1611 /* Don't need space if we're reusing! */
1612 if (ocfs2_xa_can_reuse_entry(loc, xi))
1613 needed_space = 0;
1614 else
1615 needed_space -= ocfs2_xe_entry_usage(loc->xl_entry);
1616 }
1617 if (needed_space < 0)
1618 needed_space = 0;
1619 return ocfs2_xa_check_space_helper(needed_space, free_start, count);
1620}
1621
11179f2c
JB		 1622/*
1623 * Block storage for xattrs keeps the name+value pairs compacted. When
1624 * we remove one, we have to shift any that preceded it towards the end.
1625 */
1626static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc)
1627{
1628 int i, offset;
1629 int namevalue_offset, first_namevalue_offset, namevalue_size;
1630 struct ocfs2_xattr_entry *entry = loc->xl_entry;
1631 struct ocfs2_xattr_header *xh = loc->xl_header;
11179f2c
JB		 1632 int count = le16_to_cpu(xh->xh_count);
1633
1634 namevalue_offset = le16_to_cpu(entry->xe_name_offset);
199799a3 1635 namevalue_size = namevalue_size_xe(entry);
69a3e539 1636 first_namevalue_offset = ocfs2_xa_get_free_start(loc);
11179f2c
JB		 1637
1638 /* Shift the name+value pairs */
1639 memmove((char *)xh + first_namevalue_offset + namevalue_size,
1640 (char *)xh + first_namevalue_offset,
1641 namevalue_offset - first_namevalue_offset);
1642 memset((char *)xh + first_namevalue_offset, 0, namevalue_size);
1643
1644 /* Now tell xh->xh_entries about it */
1645 for (i = 0; i < count; i++) {
1646 offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
dfe4d3d6 1647 if (offset <= namevalue_offset)
11179f2c
JB		 1648 le16_add_cpu(&xh->xh_entries[i].xe_name_offset,
1649 namevalue_size);
1650 }
1651
1652 /*
1653 * Note that we don't update xh_free_start or xh_name_value_len
1654 * because they're not used in block-stored xattrs.
1655 */
1656}
1657
69a3e539
JB		 1658static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1659{
1660 int count = le16_to_cpu(loc->xl_header->xh_count);
1661 loc->xl_entry = &(loc->xl_header->xh_entries[count]);
1662 le16_add_cpu(&loc->xl_header->xh_count, 1);
1663 memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
1664}
1665
1666static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size)
1667{
1668 int free_start = ocfs2_xa_get_free_start(loc);
1669
1670 loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size);
1671}
1672
3fc12afa
JB		 1673static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc,
1674 struct ocfs2_xattr_value_buf *vb)
1675{
1676 struct buffer_head *bh = loc->xl_storage;
1677
1678 if (loc->xl_size == (bh->b_size -
1679 offsetof(struct ocfs2_xattr_block,
1680 xb_attrs.xb_header)))
1681 vb->vb_access = ocfs2_journal_access_xb;
1682 else
1683 vb->vb_access = ocfs2_journal_access_di;
1684 vb->vb_bh = bh;
1685}
1686
11179f2c
JB		 1687/*
1688 * Operations for xattrs stored in blocks. This includes inline inode
1689 * storage and unindexed ocfs2_xattr_blocks.
1690 */
1691static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = {
cf2bc809
JB		 1692 .xlo_journal_access = ocfs2_xa_block_journal_access,
1693 .xlo_journal_dirty = ocfs2_xa_block_journal_dirty,
11179f2c 1694 .xlo_offset_pointer = ocfs2_xa_block_offset_pointer,
69a3e539
JB		 1695 .xlo_check_space = ocfs2_xa_block_check_space,
1696 .xlo_can_reuse = ocfs2_xa_block_can_reuse,
1697 .xlo_get_free_start = ocfs2_xa_block_get_free_start,
11179f2c 1698 .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue,
69a3e539
JB		 1699 .xlo_add_entry = ocfs2_xa_block_add_entry,
1700 .xlo_add_namevalue = ocfs2_xa_block_add_namevalue,
3fc12afa 1701 .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf,
11179f2c
JB		 1702};
1703
cf2bc809
JB		 1704static int ocfs2_xa_bucket_journal_access(handle_t *handle,
1705 struct ocfs2_xa_loc *loc, int type)
1706{
1707 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1708
1709 return ocfs2_xattr_bucket_journal_access(handle, bucket, type);
1710}
1711
1712static void ocfs2_xa_bucket_journal_dirty(handle_t *handle,
1713 struct ocfs2_xa_loc *loc)
1714{
1715 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1716
1717 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
1718}
1719
11179f2c
JB		 1720static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
1721 int offset)
1722{
1723 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1724 int block, block_offset;
1725
11179f2c 1726 /* The header is at the front of the bucket */
cf2bc809
JB		 1727 block = offset >> loc->xl_inode->i_sb->s_blocksize_bits;
1728 block_offset = offset % loc->xl_inode->i_sb->s_blocksize;
11179f2c
JB		 1729
1730 return bucket_block(bucket, block) + block_offset;
1731}
1732
69a3e539
JB		 1733static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc,
1734 struct ocfs2_xattr_info *xi)
1735{
1736 return namevalue_size_xe(loc->xl_entry) >=
1737 namevalue_size_xi(xi);
1738}
1739
1740static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc)
1741{
1742 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
1743 return le16_to_cpu(bucket_xh(bucket)->xh_free_start);
1744}
1745
1746static int ocfs2_bucket_align_free_start(struct super_block *sb,
1747 int free_start, int size)
1748{
1749 /*
1750 * We need to make sure that the name+value pair fits within
1751 * one block.
1752 */
1753 if (((free_start - size) >> sb->s_blocksize_bits) !=
1754 ((free_start - 1) >> sb->s_blocksize_bits))
1755 free_start -= free_start % sb->s_blocksize;
1756
1757 return free_start;
1758}
1759
1760static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc,
1761 struct ocfs2_xattr_info *xi)
1762{
1763 int rc;
1764 int count = le16_to_cpu(loc->xl_header->xh_count);
1765 int free_start = ocfs2_xa_get_free_start(loc);
1766 int needed_space = ocfs2_xi_entry_usage(xi);
1767 int size = namevalue_size_xi(xi);
cf2bc809 1768 struct super_block *sb = loc->xl_inode->i_sb;
69a3e539
JB		 1769
1770 /*
1771 * Bucket storage does not reclaim name+value pairs it cannot
1772 * reuse. They live as holes until the bucket fills, and then
1773 * the bucket is defragmented. However, the bucket can reclaim
1774 * the ocfs2_xattr_entry.
1775 */
1776 if (loc->xl_entry) {
1777 /* Don't need space if we're reusing! */
1778 if (ocfs2_xa_can_reuse_entry(loc, xi))
1779 needed_space = 0;
1780 else
1781 needed_space -= sizeof(struct ocfs2_xattr_entry);
1782 }
1783 BUG_ON(needed_space < 0);
1784
1785 if (free_start < size) {
1786 if (needed_space)
1787 return -ENOSPC;
1788 } else {
1789 /*
1790 * First we check if it would fit in the first place.
1791 * Below, we align the free start to a block. This may
1792 * slide us below the minimum gap. By checking unaligned
1793 * first, we avoid that error.
1794 */
1795 rc = ocfs2_xa_check_space_helper(needed_space, free_start,
1796 count);
1797 if (rc)
1798 return rc;
1799 free_start = ocfs2_bucket_align_free_start(sb, free_start,
1800 size);
1801 }
1802 return ocfs2_xa_check_space_helper(needed_space, free_start, count);
1803}
1804
11179f2c
JB		 1805static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc)
1806{
199799a3
JB		 1807 le16_add_cpu(&loc->xl_header->xh_name_value_len,
1808 -namevalue_size_xe(loc->xl_entry));
11179f2c
JB		 1809}
1810
69a3e539
JB		 1811static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
1812{
1813 struct ocfs2_xattr_header *xh = loc->xl_header;
1814 int count = le16_to_cpu(xh->xh_count);
1815 int low = 0, high = count - 1, tmp;
1816 struct ocfs2_xattr_entry *tmp_xe;
1817
1818 /*
1819 * We keep buckets sorted by name_hash, so we need to find
1820 * our insert place.
1821 */
1822 while (low <= high && count) {
1823 tmp = (low + high) / 2;
1824 tmp_xe = &xh->xh_entries[tmp];
1825
1826 if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
1827 low = tmp + 1;
1828 else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash))
1829 high = tmp - 1;
1830 else {
1831 low = tmp;
1832 break;
1833 }
1834 }
1835
1836 if (low != count)
1837 memmove(&xh->xh_entries[low + 1],
1838 &xh->xh_entries[low],
1839 ((count - low) * sizeof(struct ocfs2_xattr_entry)));
1840
1841 le16_add_cpu(&xh->xh_count, 1);
1842 loc->xl_entry = &xh->xh_entries[low];
1843 memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
1844}
1845
1846static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size)
1847{
1848 int free_start = ocfs2_xa_get_free_start(loc);
1849 struct ocfs2_xattr_header *xh = loc->xl_header;
cf2bc809 1850 struct super_block *sb = loc->xl_inode->i_sb;
69a3e539
JB		 1851 int nameval_offset;
1852
1853 free_start = ocfs2_bucket_align_free_start(sb, free_start, size);
1854 nameval_offset = free_start - size;
1855 loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset);
1856 xh->xh_free_start = cpu_to_le16(nameval_offset);
1857 le16_add_cpu(&xh->xh_name_value_len, size);
1858
1859}
1860
3fc12afa
JB		 1861static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc,
1862 struct ocfs2_xattr_value_buf *vb)
1863{
1864 struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
cf2bc809 1865 struct super_block *sb = loc->xl_inode->i_sb;
3fc12afa
JB		 1866 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
1867 int size = namevalue_size_xe(loc->xl_entry);
1868 int block_offset = nameval_offset >> sb->s_blocksize_bits;
1869
1870 /* Values are not allowed to straddle block boundaries */
1871 BUG_ON(block_offset !=
1872 ((nameval_offset + size - 1) >> sb->s_blocksize_bits));
1873 /* We expect the bucket to be filled in */
1874 BUG_ON(!bucket->bu_bhs[block_offset]);
1875
1876 vb->vb_access = ocfs2_journal_access;
1877 vb->vb_bh = bucket->bu_bhs[block_offset];
1878}
1879
11179f2c
JB		 1880/* Operations for xattrs stored in buckets. */
1881static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
cf2bc809
JB		 1882 .xlo_journal_access = ocfs2_xa_bucket_journal_access,
1883 .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty,
11179f2c 1884 .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer,
69a3e539
JB		 1885 .xlo_check_space = ocfs2_xa_bucket_check_space,
1886 .xlo_can_reuse = ocfs2_xa_bucket_can_reuse,
1887 .xlo_get_free_start = ocfs2_xa_bucket_get_free_start,
11179f2c 1888 .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue,
69a3e539
JB		 1889 .xlo_add_entry = ocfs2_xa_bucket_add_entry,
1890 .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue,
3fc12afa 1891 .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf,
11179f2c
JB		 1892};
1893
399ff3a7
JB		 1894static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc)
1895{
1896 struct ocfs2_xattr_value_buf vb;
1897
1898 if (ocfs2_xattr_is_local(loc->xl_entry))
1899 return 0;
1900
1901 ocfs2_xa_fill_value_buf(loc, &vb);
1902 return le32_to_cpu(vb.vb_xv->xr_clusters);
1903}
1904
73857ee0
JB		 1905static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes,
1906 struct ocfs2_xattr_set_ctxt *ctxt)
1907{
1908 int trunc_rc, access_rc;
1909 struct ocfs2_xattr_value_buf vb;
1910
1911 ocfs2_xa_fill_value_buf(loc, &vb);
1912 trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes,
1913 ctxt);
1914
1915 /*
1916 * The caller of ocfs2_xa_value_truncate() has already called
1917 * ocfs2_xa_journal_access on the loc. However, The truncate code
1918 * calls ocfs2_extend_trans(). This may commit the previous
1919 * transaction and open a new one. If this is a bucket, truncate
1920 * could leave only vb->vb_bh set up for journaling. Meanwhile,
1921 * the caller is expecting to dirty the entire bucket. So we must
1922 * reset the journal work. We do this even if truncate has failed,
1923 * as it could have failed after committing the extend.
1924 */
1925 access_rc = ocfs2_xa_journal_access(ctxt->handle, loc,
1926 OCFS2_JOURNAL_ACCESS_WRITE);
1927
1928 /* Errors in truncate take precedence */
1929 return trunc_rc ? trunc_rc : access_rc;
1930}
1931
11179f2c
JB		 1932static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
1933{
bde1e540
JB		 1934 int index, count;
1935 struct ocfs2_xattr_header *xh = loc->xl_header;
1936 struct ocfs2_xattr_entry *entry = loc->xl_entry;
1937
11179f2c 1938 ocfs2_xa_wipe_namevalue(loc);
bde1e540
JB		 1939 loc->xl_entry = NULL;
1940
1941 le16_add_cpu(&xh->xh_count, -1);
1942 count = le16_to_cpu(xh->xh_count);
1943
1944 /*
1945 * Only zero out the entry if there are more remaining. This is
1946 * important for an empty bucket, as it keeps track of the
1947 * bucket's hash value. It doesn't hurt empty block storage.
1948 */
1949 if (count) {
1950 index = ((char *)entry - (char *)&xh->xh_entries) /
1951 sizeof(struct ocfs2_xattr_entry);
1952 memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1],
1953 (count - index) * sizeof(struct ocfs2_xattr_entry));
1954 memset(&xh->xh_entries[count], 0,
1955 sizeof(struct ocfs2_xattr_entry));
1956 }
11179f2c
JB		 1957}
1958
399ff3a7
JB		 1959/*
1960 * If we have a problem adjusting the size of an external value during
1961 * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr
1962 * in an intermediate state. For example, the value may be partially
1963 * truncated.
1964 *
1965 * If the value tree hasn't changed, the extend/truncate went nowhere.
1966 * We have nothing to do. The caller can treat it as a straight error.
1967 *
1968 * If the value tree got partially truncated, we now have a corrupted
1969 * extended attribute. We're going to wipe its entry and leak the
1970 * clusters. Better to leak some storage than leave a corrupt entry.
1971 *
1972 * If the value tree grew, it obviously didn't grow enough for the
1973 * new entry. We're not going to try and reclaim those clusters either.
1974 * If there was already an external value there (orig_clusters != 0),
1975 * the new clusters are attached safely and we can just leave the old
1976 * value in place. If there was no external value there, we remove
1977 * the entry.
1978 *
1979 * This way, the xattr block we store in the journal will be consistent.
1980 * If the size change broke because of the journal, no changes will hit
1981 * disk anyway.
1982 */
1983static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc,
1984 const char *what,
1985 unsigned int orig_clusters)
1986{
1987 unsigned int new_clusters = ocfs2_xa_value_clusters(loc);
1988 char *nameval_buf = ocfs2_xa_offset_pointer(loc,
1989 le16_to_cpu(loc->xl_entry->xe_name_offset));
1990
1991 if (new_clusters < orig_clusters) {
1992 mlog(ML_ERROR,
1993 "Partial truncate while %s xattr %.*s. Leaking "
1994 "%u clusters and removing the entry\n",
1995 what, loc->xl_entry->xe_name_len, nameval_buf,
1996 orig_clusters - new_clusters);
1997 ocfs2_xa_remove_entry(loc);
1998 } else if (!orig_clusters) {
1999 mlog(ML_ERROR,
2000 "Unable to allocate an external value for xattr "
2001 "%.*s safely. Leaking %u clusters and removing the "
2002 "entry\n",
2003 loc->xl_entry->xe_name_len, nameval_buf,
2004 new_clusters - orig_clusters);
2005 ocfs2_xa_remove_entry(loc);
2006 } else if (new_clusters > orig_clusters)
2007 mlog(ML_ERROR,
2008 "Unable to grow xattr %.*s safely. %u new clusters "
2009 "have been added, but the value will not be "
2010 "modified\n",
2011 loc->xl_entry->xe_name_len, nameval_buf,
2012 new_clusters - orig_clusters);
2013}
2014
73857ee0
JB		 2015static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc,
2016 struct ocfs2_xattr_set_ctxt *ctxt)
2017{
2018 int rc = 0;
399ff3a7 2019 unsigned int orig_clusters;
73857ee0
JB		 2020
2021 if (!ocfs2_xattr_is_local(loc->xl_entry)) {
399ff3a7 2022 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0
JB		 2023 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
2024 if (rc) {
2025 mlog_errno(rc);
399ff3a7
JB		 2026 /*
2027 * Since this is remove, we can return 0 if
2028 * ocfs2_xa_cleanup_value_truncate() is going to
2029 * wipe the entry anyway. So we check the
2030 * cluster count as well.
2031 */
2032 if (orig_clusters != ocfs2_xa_value_clusters(loc))
2033 rc = 0;
2034 ocfs2_xa_cleanup_value_truncate(loc, "removing",
2035 orig_clusters);
2036 if (rc)
2037 goto out;
73857ee0
JB		 2038 }
2039 }
2040
2041 ocfs2_xa_remove_entry(loc);
2042
2043out:
2044 return rc;
2045}
2046
2047static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc)
2048{
2049 int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len);
2050 char *nameval_buf;
2051
2052 nameval_buf = ocfs2_xa_offset_pointer(loc,
2053 le16_to_cpu(loc->xl_entry->xe_name_offset));
2054 memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE);
2055}
2056
2057/*
2058 * Take an existing entry and make it ready for the new value. This
2059 * won't allocate space, but it may free space. It should be ready for
2060 * ocfs2_xa_prepare_entry() to finish the work.
2061 */
2062static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc,
2063 struct ocfs2_xattr_info *xi,
2064 struct ocfs2_xattr_set_ctxt *ctxt)
2065{
2066 int rc = 0;
2067 int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
399ff3a7 2068 unsigned int orig_clusters;
73857ee0
JB		 2069 char *nameval_buf;
2070 int xe_local = ocfs2_xattr_is_local(loc->xl_entry);
2071 int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE;
2072
2073 BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) !=
2074 name_size);
2075
2076 nameval_buf = ocfs2_xa_offset_pointer(loc,
2077 le16_to_cpu(loc->xl_entry->xe_name_offset));
2078 if (xe_local) {
2079 memset(nameval_buf + name_size, 0,
2080 namevalue_size_xe(loc->xl_entry) - name_size);
2081 if (!xi_local)
2082 ocfs2_xa_install_value_root(loc);
2083 } else {
399ff3a7 2084 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0
JB		 2085 if (xi_local) {
2086 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
399ff3a7 2087 if (rc < 0)
73857ee0 2088 mlog_errno(rc);
399ff3a7
JB		 2089 else
2090 memset(nameval_buf + name_size, 0,
2091 namevalue_size_xe(loc->xl_entry) -
2092 name_size);
73857ee0
JB		 2093 } else if (le64_to_cpu(loc->xl_entry->xe_value_size) >
2094 xi->xi_value_len) {
2095 rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len,
2096 ctxt);
399ff3a7 2097 if (rc < 0)
73857ee0 2098 mlog_errno(rc);
399ff3a7
JB		 2099 }
2100
2101 if (rc) {
2102 ocfs2_xa_cleanup_value_truncate(loc, "reusing",
2103 orig_clusters);
2104 goto out;
73857ee0
JB		 2105 }
2106 }
2107
2108 loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
2109 ocfs2_xattr_set_local(loc->xl_entry, xi_local);
2110
2111out:
2112 return rc;
2113}
2114
69a3e539
JB		 2115/*
2116 * Prepares loc->xl_entry to receive the new xattr. This includes
2117 * properly setting up the name+value pair region. If loc->xl_entry
2118 * already exists, it will take care of modifying it appropriately.
69a3e539
JB		 2119 *
2120 * Note that this modifies the data. You did journal_access already,
2121 * right?
2122 */
2123static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
2124 struct ocfs2_xattr_info *xi,
73857ee0
JB		 2125 u32 name_hash,
2126 struct ocfs2_xattr_set_ctxt *ctxt)
69a3e539
JB		 2127{
2128 int rc = 0;
399ff3a7
JB		 2129 unsigned int orig_clusters;
2130 __le64 orig_value_size = 0;
69a3e539 2131
69a3e539
JB		 2132 rc = ocfs2_xa_check_space(loc, xi);
2133 if (rc)
2134 goto out;
2135
2136 if (loc->xl_entry) {
2137 if (ocfs2_xa_can_reuse_entry(loc, xi)) {
399ff3a7 2138 orig_value_size = loc->xl_entry->xe_value_size;
73857ee0
JB		 2139 rc = ocfs2_xa_reuse_entry(loc, xi, ctxt);
2140 if (rc)
2141 goto out;
2142 goto alloc_value;
69a3e539
JB		 2143 }
2144
73857ee0 2145 if (!ocfs2_xattr_is_local(loc->xl_entry)) {
399ff3a7 2146 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0
JB		 2147 rc = ocfs2_xa_value_truncate(loc, 0, ctxt);
2148 if (rc) {
2149 mlog_errno(rc);
399ff3a7
JB		 2150 ocfs2_xa_cleanup_value_truncate(loc,
2151 "overwriting",
2152 orig_clusters);
73857ee0
JB		 2153 goto out;
2154 }
2155 }
69a3e539
JB		 2156 ocfs2_xa_wipe_namevalue(loc);
2157 } else
2158 ocfs2_xa_add_entry(loc, name_hash);
2159
2160 /*
2161 * If we get here, we have a blank entry. Fill it. We grow our
2162 * name+value pair back from the end.
2163 */
2164 ocfs2_xa_add_namevalue(loc, xi);
73857ee0
JB		 2165 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
2166 ocfs2_xa_install_value_root(loc);
2167
2168alloc_value:
2169 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
399ff3a7 2170 orig_clusters = ocfs2_xa_value_clusters(loc);
73857ee0 2171 rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt);
399ff3a7 2172 if (rc < 0) {
5f5261ac 2173 ctxt->set_abort = 1;
399ff3a7
JB		 2174 ocfs2_xa_cleanup_value_truncate(loc, "growing",
2175 orig_clusters);
d5a7df06
TM		 2176 /*
2177 * If we were growing an existing value,
2178 * ocfs2_xa_cleanup_value_truncate() won't remove
2179 * the entry. We need to restore the original value
2180 * size.
2181 */
2182 if (loc->xl_entry) {
2183 BUG_ON(!orig_value_size);
2184 loc->xl_entry->xe_value_size = orig_value_size;
2185 }
73857ee0 2186 mlog_errno(rc);
399ff3a7 2187 }
73857ee0 2188 }
69a3e539
JB		 2189
2190out:
2191 return rc;
2192}
2193
2194/*
73857ee0
JB		 2195 * Store the value portion of the name+value pair. This will skip
2196 * values that are stored externally. Their tree roots were set up
2197 * by ocfs2_xa_prepare_entry().
69a3e539 2198 */
73857ee0
JB		 2199static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc,
2200 struct ocfs2_xattr_info *xi,
2201 struct ocfs2_xattr_set_ctxt *ctxt)
69a3e539 2202{
73857ee0 2203 int rc = 0;
69a3e539
JB		 2204 int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
2205 int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
69a3e539 2206 char *nameval_buf;
73857ee0 2207 struct ocfs2_xattr_value_buf vb;
69a3e539 2208
69a3e539 2209 nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
73857ee0
JB		 2210 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
2211 ocfs2_xa_fill_value_buf(loc, &vb);
2212 rc = __ocfs2_xattr_set_value_outside(loc->xl_inode,
2213 ctxt->handle, &vb,
2214 xi->xi_value,
2215 xi->xi_value_len);
2216 } else
2217 memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len);
2218
73857ee0 2219 return rc;
69a3e539
JB		 2220}
2221
bca5e9bd
JB		 2222static int ocfs2_xa_set(struct ocfs2_xa_loc *loc,
2223 struct ocfs2_xattr_info *xi,
2224 struct ocfs2_xattr_set_ctxt *ctxt)
2225{
2226 int ret;
2227 u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name,
2228 xi->xi_name_len);
2229
2230 ret = ocfs2_xa_journal_access(ctxt->handle, loc,
2231 OCFS2_JOURNAL_ACCESS_WRITE);
2232 if (ret) {
2233 mlog_errno(ret);
2234 goto out;
2235 }
2236
399ff3a7
JB		 2237 /*
2238 * From here on out, everything is going to modify the buffer a
2239 * little. Errors are going to leave the xattr header in a
2240 * sane state. Thus, even with errors we dirty the sucker.
2241 */
2242
bca5e9bd
JB		 2243 /* Don't worry, we are never called with !xi_value and !xl_entry */
2244 if (!xi->xi_value) {
2245 ret = ocfs2_xa_remove(loc, ctxt);
399ff3a7 2246 goto out_dirty;
bca5e9bd
JB		 2247 }
2248
2249 ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt);
2250 if (ret) {
2251 if (ret != -ENOSPC)
2252 mlog_errno(ret);
399ff3a7 2253 goto out_dirty;
bca5e9bd
JB		 2254 }
2255
2256 ret = ocfs2_xa_store_value(loc, xi, ctxt);
399ff3a7 2257 if (ret)
bca5e9bd 2258 mlog_errno(ret);
bca5e9bd 2259
399ff3a7 2260out_dirty:
bca5e9bd
JB		 2261 ocfs2_xa_journal_dirty(ctxt->handle, loc);
2262
2263out:
2264 return ret;
2265}
2266
11179f2c
JB		 2267static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
2268 struct inode *inode,
2269 struct buffer_head *bh,
2270 struct ocfs2_xattr_entry *entry)
2271{
2272 struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
2273
139fface
JB		 2274 BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL));
2275
cf2bc809 2276 loc->xl_inode = inode;
11179f2c
JB		 2277 loc->xl_ops = &ocfs2_xa_block_loc_ops;
2278 loc->xl_storage = bh;
2279 loc->xl_entry = entry;
139fface 2280 loc->xl_size = le16_to_cpu(di->i_xattr_inline_size);
11179f2c
JB		 2281 loc->xl_header =
2282 (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size -
2283 loc->xl_size);
2284}
2285
2286static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc,
cf2bc809 2287 struct inode *inode,
11179f2c
JB		 2288 struct buffer_head *bh,
2289 struct ocfs2_xattr_entry *entry)
2290{
2291 struct ocfs2_xattr_block *xb =
2292 (struct ocfs2_xattr_block *)bh->b_data;
2293
2294 BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED);
2295
cf2bc809 2296 loc->xl_inode = inode;
11179f2c
JB		 2297 loc->xl_ops = &ocfs2_xa_block_loc_ops;
2298 loc->xl_storage = bh;
2299 loc->xl_header = &(xb->xb_attrs.xb_header);
2300 loc->xl_entry = entry;
2301 loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block,
2302 xb_attrs.xb_header);
2303}
2304
2305static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc,
2306 struct ocfs2_xattr_bucket *bucket,
2307 struct ocfs2_xattr_entry *entry)
2308{
cf2bc809 2309 loc->xl_inode = bucket->bu_inode;
11179f2c
JB		 2310 loc->xl_ops = &ocfs2_xa_bucket_loc_ops;
2311 loc->xl_storage = bucket;
2312 loc->xl_header = bucket_xh(bucket);
2313 loc->xl_entry = entry;
2314 loc->xl_size = OCFS2_XATTR_BUCKET_SIZE;
2315}
2316
ce9c5a54
TM		 2317/*
2318 * In xattr remove, if it is stored outside and refcounted, we may have
2319 * the chance to split the refcount tree. So need the allocators.
2320 */
2321static int ocfs2_lock_xattr_remove_allocators(struct inode *inode,
2322 struct ocfs2_xattr_value_root *xv,
2323 struct ocfs2_caching_info *ref_ci,
2324 struct buffer_head *ref_root_bh,
2325 struct ocfs2_alloc_context **meta_ac,
2326 int *ref_credits)
2327{
2328 int ret, meta_add = 0;
2329 u32 p_cluster, num_clusters;
2330 unsigned int ext_flags;
2331
2332 *ref_credits = 0;
2333 ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster,
2334 &num_clusters,
2335 &xv->xr_list,
2336 &ext_flags);
2337 if (ret) {
2338 mlog_errno(ret);
2339 goto out;
2340 }
2341
2342 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
2343 goto out;
2344
2345 ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci,
2346 ref_root_bh, xv,
2347 &meta_add, ref_credits);
2348 if (ret) {
2349 mlog_errno(ret);
2350 goto out;
2351 }
2352
2353 ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb),
2354 meta_add, meta_ac);
2355 if (ret)
2356 mlog_errno(ret);
2357
2358out:
2359 return ret;
2360}
2361
cf1d6c76 2362static int ocfs2_remove_value_outside(struct inode*inode,
4311901d 2363 struct ocfs2_xattr_value_buf *vb,
ce9c5a54
TM		 2364 struct ocfs2_xattr_header *header,
2365 struct ocfs2_caching_info *ref_ci,
2366 struct buffer_head *ref_root_bh)
cf1d6c76 2367{
ce9c5a54 2368 int ret = 0, i, ref_credits;
78f30c31
TM		 2369 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2370 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
ce9c5a54 2371 void *val;
78f30c31
TM		 2372
2373 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
cf1d6c76
TY		 2374
2375 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
2376 struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
2377
ce9c5a54
TM		 2378 if (ocfs2_xattr_is_local(entry))
2379 continue;
cf1d6c76 2380
ce9c5a54
TM		 2381 val = (void *)header +
2382 le16_to_cpu(entry->xe_name_offset);
2383 vb->vb_xv = (struct ocfs2_xattr_value_root *)
2384 (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
2385
2386 ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv,
2387 ref_ci, ref_root_bh,
2388 &ctxt.meta_ac,
2389 &ref_credits);
2390
2391 ctxt.handle = ocfs2_start_trans(osb, ref_credits +
2392 ocfs2_remove_extent_credits(osb->sb));
2393 if (IS_ERR(ctxt.handle)) {
2394 ret = PTR_ERR(ctxt.handle);
2395 mlog_errno(ret);
2396 break;
2397 }
2398
2399 ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt);
ce9c5a54
TM		 2400
2401 ocfs2_commit_trans(osb, ctxt.handle);
2402 if (ctxt.meta_ac) {
2403 ocfs2_free_alloc_context(ctxt.meta_ac);
2404 ctxt.meta_ac = NULL;
cf1d6c76 2405 }
b8a0ae57
WW		 2406
2407 if (ret < 0) {
2408 mlog_errno(ret);
2409 break;
2410 }
2411
cf1d6c76
TY		 2412 }
2413
ce9c5a54
TM		 2414 if (ctxt.meta_ac)
2415 ocfs2_free_alloc_context(ctxt.meta_ac);
78f30c31
TM		 2416 ocfs2_schedule_truncate_log_flush(osb, 1);
2417 ocfs2_run_deallocs(osb, &ctxt.dealloc);
cf1d6c76
TY		 2418 return ret;
2419}
2420
2421static int ocfs2_xattr_ibody_remove(struct inode *inode,
ce9c5a54
TM		 2422 struct buffer_head *di_bh,
2423 struct ocfs2_caching_info *ref_ci,
2424 struct buffer_head *ref_root_bh)
cf1d6c76
TY		 2425{
2426
2427 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2428 struct ocfs2_xattr_header *header;
2429 int ret;
4311901d
JB		 2430 struct ocfs2_xattr_value_buf vb = {
2431 .vb_bh = di_bh,
2432 .vb_access = ocfs2_journal_access_di,
2433 };
cf1d6c76
TY		 2434
2435 header = (struct ocfs2_xattr_header *)
2436 ((void *)di + inode->i_sb->s_blocksize -
2437 le16_to_cpu(di->i_xattr_inline_size));
2438
ce9c5a54
TM		 2439 ret = ocfs2_remove_value_outside(inode, &vb, header,
2440 ref_ci, ref_root_bh);
cf1d6c76
TY		 2441
2442 return ret;
2443}
2444
ce9c5a54
TM		 2445struct ocfs2_rm_xattr_bucket_para {
2446 struct ocfs2_caching_info *ref_ci;
2447 struct buffer_head *ref_root_bh;
2448};
2449
cf1d6c76 2450static int ocfs2_xattr_block_remove(struct inode *inode,
ce9c5a54
TM		 2451 struct buffer_head *blk_bh,
2452 struct ocfs2_caching_info *ref_ci,
2453 struct buffer_head *ref_root_bh)
cf1d6c76
TY		 2454{
2455 struct ocfs2_xattr_block *xb;
cf1d6c76 2456 int ret = 0;
4311901d
JB		 2457 struct ocfs2_xattr_value_buf vb = {
2458 .vb_bh = blk_bh,
2459 .vb_access = ocfs2_journal_access_xb,
2460 };
ce9c5a54
TM		 2461 struct ocfs2_rm_xattr_bucket_para args = {
2462 .ref_ci = ref_ci,
2463 .ref_root_bh = ref_root_bh,
2464 };
cf1d6c76
TY		 2465
2466 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
a3944256
TM		 2467 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2468 struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header);
ce9c5a54
TM		 2469 ret = ocfs2_remove_value_outside(inode, &vb, header,
2470 ref_ci, ref_root_bh);
a3944256 2471 } else
47bca495
TM		 2472 ret = ocfs2_iterate_xattr_index_block(inode,
2473 blk_bh,
2474 ocfs2_rm_xattr_cluster,
ce9c5a54 2475 &args);
cf1d6c76
TY		 2476
2477 return ret;
2478}
2479
08413899 2480static int ocfs2_xattr_free_block(struct inode *inode,
ce9c5a54
TM		 2481 u64 block,
2482 struct ocfs2_caching_info *ref_ci,
2483 struct buffer_head *ref_root_bh)
08413899
TM		 2484{
2485 struct inode *xb_alloc_inode;
2486 struct buffer_head *xb_alloc_bh = NULL;
2487 struct buffer_head *blk_bh = NULL;
2488 struct ocfs2_xattr_block *xb;
2489 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2490 handle_t *handle;
2491 int ret = 0;
2492 u64 blk, bg_blkno;
2493 u16 bit;
2494
4ae1d69b 2495 ret = ocfs2_read_xattr_block(inode, block, &blk_bh);
08413899
TM		 2496 if (ret < 0) {
2497 mlog_errno(ret);
2498 goto out;
2499 }
2500
ce9c5a54 2501 ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh);
08413899
TM		 2502 if (ret < 0) {
2503 mlog_errno(ret);
2504 goto out;
2505 }
2506
4ae1d69b 2507 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
08413899
TM		 2508 blk = le64_to_cpu(xb->xb_blkno);
2509 bit = le16_to_cpu(xb->xb_suballoc_bit);
74380c47
TM		 2510 if (xb->xb_suballoc_loc)
2511 bg_blkno = le64_to_cpu(xb->xb_suballoc_loc);
2512 else
2513 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
08413899
TM		 2514
2515 xb_alloc_inode = ocfs2_get_system_file_inode(osb,
2516 EXTENT_ALLOC_SYSTEM_INODE,
2517 le16_to_cpu(xb->xb_suballoc_slot));
2518 if (!xb_alloc_inode) {
2519 ret = -ENOMEM;
2520 mlog_errno(ret);
2521 goto out;
2522 }
5955102c 2523 inode_lock(xb_alloc_inode);
08413899
TM		 2524
2525 ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
2526 if (ret < 0) {
2527 mlog_errno(ret);
2528 goto out_mutex;
2529 }
2530
2531 handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE);
2532 if (IS_ERR(handle)) {
2533 ret = PTR_ERR(handle);
2534 mlog_errno(ret);
2535 goto out_unlock;
2536 }
2537
2538 ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
2539 bit, bg_blkno, 1);
2540 if (ret < 0)
2541 mlog_errno(ret);
2542
2543 ocfs2_commit_trans(osb, handle);
2544out_unlock:
2545 ocfs2_inode_unlock(xb_alloc_inode, 1);
2546 brelse(xb_alloc_bh);
2547out_mutex:
5955102c 2548 inode_unlock(xb_alloc_inode);
08413899
TM		 2549 iput(xb_alloc_inode);
2550out:
2551 brelse(blk_bh);
2552 return ret;
2553}
2554
cf1d6c76
TY		 2555/*
2556 * ocfs2_xattr_remove()
2557 *
2558 * Free extended attribute resources associated with this inode.
2559 */
2560int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh)
2561{
cf1d6c76
TY		 2562 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2563 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
ce9c5a54
TM		 2564 struct ocfs2_refcount_tree *ref_tree = NULL;
2565 struct buffer_head *ref_root_bh = NULL;
2566 struct ocfs2_caching_info *ref_ci = NULL;
cf1d6c76
TY		 2567 handle_t *handle;
2568 int ret;
2569
8154da3d
TY		 2570 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
2571 return 0;
2572
cf1d6c76
TY		 2573 if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL))
2574 return 0;
2575
84e40080 2576 if (ocfs2_is_refcount_inode(inode)) {
ce9c5a54
TM		 2577 ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb),
2578 le64_to_cpu(di->i_refcount_loc),
2579 1, &ref_tree, &ref_root_bh);
2580 if (ret) {
2581 mlog_errno(ret);
2582 goto out;
2583 }
2584 ref_ci = &ref_tree->rf_ci;
2585
2586 }
2587
cf1d6c76 2588 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
ce9c5a54
TM		 2589 ret = ocfs2_xattr_ibody_remove(inode, di_bh,
2590 ref_ci, ref_root_bh);
cf1d6c76
TY		 2591 if (ret < 0) {
2592 mlog_errno(ret);
2593 goto out;
2594 }
2595 }
cf1d6c76 2596
08413899
TM		 2597 if (di->i_xattr_loc) {
2598 ret = ocfs2_xattr_free_block(inode,
ce9c5a54
TM		 2599 le64_to_cpu(di->i_xattr_loc),
2600 ref_ci, ref_root_bh);
cf1d6c76
TY		 2601 if (ret < 0) {
2602 mlog_errno(ret);
2603 goto out;
2604 }
2605 }
2606
2607 handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)),
2608 OCFS2_INODE_UPDATE_CREDITS);
2609 if (IS_ERR(handle)) {
2610 ret = PTR_ERR(handle);
2611 mlog_errno(ret);
2612 goto out;
2613 }
0cf2f763 2614 ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
84008972 2615 OCFS2_JOURNAL_ACCESS_WRITE);
cf1d6c76
TY		 2616 if (ret) {
2617 mlog_errno(ret);
2618 goto out_commit;
2619 }
2620
08413899 2621 di->i_xattr_loc = 0;
cf1d6c76
TY		 2622
2623 spin_lock(&oi->ip_lock);
2624 oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL);
2625 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2626 spin_unlock(&oi->ip_lock);
6fdb702d 2627 ocfs2_update_inode_fsync_trans(handle, inode, 0);
cf1d6c76 2628
ec20cec7 2629 ocfs2_journal_dirty(handle, di_bh);
cf1d6c76
TY		 2630out_commit:
2631 ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
2632out:
ce9c5a54
TM		 2633 if (ref_tree)
2634 ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1);
2635 brelse(ref_root_bh);
cf1d6c76
TY		 2636 return ret;
2637}
2638
2639static int ocfs2_xattr_has_space_inline(struct inode *inode,
2640 struct ocfs2_dinode *di)
2641{
2642 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2643 unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size;
2644 int free;
2645
2646 if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE)
2647 return 0;
2648
2649 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2650 struct ocfs2_inline_data *idata = &di->id2.i_data;
2651 free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size);
2652 } else if (ocfs2_inode_is_fast_symlink(inode)) {
2653 free = ocfs2_fast_symlink_chars(inode->i_sb) -
2654 le64_to_cpu(di->i_size);
2655 } else {
2656 struct ocfs2_extent_list *el = &di->id2.i_list;
2657 free = (le16_to_cpu(el->l_count) -
2658 le16_to_cpu(el->l_next_free_rec)) *
2659 sizeof(struct ocfs2_extent_rec);
2660 }
2661 if (free >= xattrsize)
2662 return 1;
2663
2664 return 0;
2665}
2666
2667/*
2668 * ocfs2_xattr_ibody_find()
2669 *
2670 * Find extended attribute in inode block and
2671 * fill search info into struct ocfs2_xattr_search.
2672 */
2673static int ocfs2_xattr_ibody_find(struct inode *inode,
2674 int name_index,
2675 const char *name,
2676 struct ocfs2_xattr_search *xs)
2677{
2678 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2679 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2680 int ret;
2681 int has_space = 0;
2682
2683 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2684 return 0;
2685
2686 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2687 down_read(&oi->ip_alloc_sem);
2688 has_space = ocfs2_xattr_has_space_inline(inode, di);
2689 up_read(&oi->ip_alloc_sem);
2690 if (!has_space)
2691 return 0;
2692 }
2693
2694 xs->xattr_bh = xs->inode_bh;
2695 xs->end = (void *)di + inode->i_sb->s_blocksize;
2696 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)
2697 xs->header = (struct ocfs2_xattr_header *)
2698 (xs->end - le16_to_cpu(di->i_xattr_inline_size));
2699 else
2700 xs->header = (struct ocfs2_xattr_header *)
2701 (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size);
2702 xs->base = (void *)xs->header;
2703 xs->here = xs->header->xh_entries;
2704
2705 /* Find the named attribute. */
2706 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
2707 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2708 if (ret && ret != -ENODATA)
2709 return ret;
2710 xs->not_found = ret;
2711 }
2712
2713 return 0;
2714}
2715
139fface
JB		 2716static int ocfs2_xattr_ibody_init(struct inode *inode,
2717 struct buffer_head *di_bh,
2718 struct ocfs2_xattr_set_ctxt *ctxt)
2719{
2720 int ret;
2721 struct ocfs2_inode_info *oi = OCFS2_I(inode);
2722 struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
2723 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
2724 unsigned int xattrsize = osb->s_xattr_inline_size;
2725
2726 if (!ocfs2_xattr_has_space_inline(inode, di)) {
2727 ret = -ENOSPC;
2728 goto out;
2729 }
2730
2731 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh,
2732 OCFS2_JOURNAL_ACCESS_WRITE);
2733 if (ret) {
2734 mlog_errno(ret);
2735 goto out;
2736 }
2737
2738 /*
2739 * Adjust extent record count or inline data size
2740 * to reserve space for extended attribute.
2741 */
2742 if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
2743 struct ocfs2_inline_data *idata = &di->id2.i_data;
2744 le16_add_cpu(&idata->id_count, -xattrsize);
2745 } else if (!(ocfs2_inode_is_fast_symlink(inode))) {
2746 struct ocfs2_extent_list *el = &di->id2.i_list;
2747 le16_add_cpu(&el->l_count, -(xattrsize /
2748 sizeof(struct ocfs2_extent_rec)));
2749 }
2750 di->i_xattr_inline_size = cpu_to_le16(xattrsize);
2751
2752 spin_lock(&oi->ip_lock);
2753 oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL;
2754 di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features);
2755 spin_unlock(&oi->ip_lock);
2756
ec20cec7 2757 ocfs2_journal_dirty(ctxt->handle, di_bh);
139fface
JB		 2758
2759out:
2760 return ret;
2761}
2762
cf1d6c76
TY		 2763/*
2764 * ocfs2_xattr_ibody_set()
2765 *
2766 * Set, replace or remove an extended attribute into inode block.
2767 *
2768 */
2769static int ocfs2_xattr_ibody_set(struct inode *inode,
2770 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2771 struct ocfs2_xattr_search *xs,
2772 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76 2773{
139fface 2774 int ret;
cf1d6c76 2775 struct ocfs2_inode_info *oi = OCFS2_I(inode);
139fface 2776 struct ocfs2_xa_loc loc;
cf1d6c76
TY		 2777
2778 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE)
2779 return -ENOSPC;
2780
2781 down_write(&oi->ip_alloc_sem);
139fface
JB		 2782 if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) {
2783 ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt);
2784 if (ret) {
2785 if (ret != -ENOSPC)
2786 mlog_errno(ret);
2787 goto out;
2788 }
2789 }
2790
2791 ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh,
2792 xs->not_found ? NULL : xs->here);
2793 ret = ocfs2_xa_set(&loc, xi, ctxt);
2794 if (ret) {
2795 if (ret != -ENOSPC)
2796 mlog_errno(ret);
2797 goto out;
2798 }
2799 xs->here = loc.xl_entry;
2800
cf1d6c76
TY		 2801out:
2802 up_write(&oi->ip_alloc_sem);
2803
2804 return ret;
2805}
2806
2807/*
2808 * ocfs2_xattr_block_find()
2809 *
2810 * Find extended attribute in external block and
2811 * fill search info into struct ocfs2_xattr_search.
2812 */
2813static int ocfs2_xattr_block_find(struct inode *inode,
2814 int name_index,
2815 const char *name,
2816 struct ocfs2_xattr_search *xs)
2817{
2818 struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
2819 struct buffer_head *blk_bh = NULL;
589dc260 2820 struct ocfs2_xattr_block *xb;
cf1d6c76
TY		 2821 int ret = 0;
2822
2823 if (!di->i_xattr_loc)
2824 return ret;
2825
4ae1d69b
JB		 2826 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
2827 &blk_bh);
cf1d6c76
TY		 2828 if (ret < 0) {
2829 mlog_errno(ret);
2830 return ret;
2831 }
f6087fb7 2832
cf1d6c76 2833 xs->xattr_bh = blk_bh;
4ae1d69b 2834 xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
589dc260
TM		 2835
2836 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
2837 xs->header = &xb->xb_attrs.xb_header;
2838 xs->base = (void *)xs->header;
2839 xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size;
2840 xs->here = xs->header->xh_entries;
2841
2842 ret = ocfs2_xattr_find_entry(name_index, name, xs);
2843 } else
2844 ret = ocfs2_xattr_index_block_find(inode, blk_bh,
2845 name_index,
2846 name, xs);
cf1d6c76 2847
cf1d6c76
TY		 2848 if (ret && ret != -ENODATA) {
2849 xs->xattr_bh = NULL;
2850 goto cleanup;
2851 }
2852 xs->not_found = ret;
2853 return 0;
cf1d6c76
TY		 2854cleanup:
2855 brelse(blk_bh);
2856
2857 return ret;
2858}
2859
d3981544 2860static int ocfs2_create_xattr_block(struct inode *inode,
5aea1f0e 2861 struct buffer_head *inode_bh,
d3981544
JB		 2862 struct ocfs2_xattr_set_ctxt *ctxt,
2863 int indexed,
2864 struct buffer_head **ret_bh)
5aea1f0e
TM		 2865{
2866 int ret;
2867 u16 suballoc_bit_start;
2868 u32 num_got;
2b6cb576 2869 u64 suballoc_loc, first_blkno;
5aea1f0e 2870 struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data;
5aea1f0e
TM		 2871 struct buffer_head *new_bh = NULL;
2872 struct ocfs2_xattr_block *xblk;
2873
d3981544
JB		 2874 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
2875 inode_bh, OCFS2_JOURNAL_ACCESS_CREATE);
5aea1f0e
TM		 2876 if (ret < 0) {
2877 mlog_errno(ret);
2878 goto end;
2879 }
2880
1ed9b777 2881 ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1,
2b6cb576
JB		 2882 &suballoc_loc, &suballoc_bit_start,
2883 &num_got, &first_blkno);
5aea1f0e
TM		 2884 if (ret < 0) {
2885 mlog_errno(ret);
2886 goto end;
2887 }
2888
2889 new_bh = sb_getblk(inode->i_sb, first_blkno);
58796207
RX		 2890 if (!new_bh) {
2891 ret = -ENOMEM;
2892 mlog_errno(ret);
2893 goto end;
2894 }
2895
5aea1f0e
TM		 2896 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
2897
d3981544 2898 ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode),
5aea1f0e
TM		 2899 new_bh,
2900 OCFS2_JOURNAL_ACCESS_CREATE);
2901 if (ret < 0) {
2902 mlog_errno(ret);
2903 goto end;
2904 }
2905
2906 /* Initialize ocfs2_xattr_block */
2907 xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
2908 memset(xblk, 0, inode->i_sb->s_blocksize);
2909 strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
d3981544 2910 xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot);
2b6cb576 2911 xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc);
5aea1f0e 2912 xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
1ed9b777
JB		 2913 xblk->xb_fs_generation =
2914 cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation);
5aea1f0e 2915 xblk->xb_blkno = cpu_to_le64(first_blkno);
a7fe7a3a
TM		 2916 if (indexed) {
2917 struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root;
2918 xr->xt_clusters = cpu_to_le32(1);
2919 xr->xt_last_eb_blk = 0;
2920 xr->xt_list.l_tree_depth = 0;
2921 xr->xt_list.l_count = cpu_to_le16(
2922 ocfs2_xattr_recs_per_xb(inode->i_sb));
2923 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
2924 xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED);
2925 }
d3981544 2926 ocfs2_journal_dirty(ctxt->handle, new_bh);
a7fe7a3a 2927
d3981544 2928 /* Add it to the inode */
5aea1f0e 2929 di->i_xattr_loc = cpu_to_le64(first_blkno);
d3981544
JB		 2930
2931 spin_lock(&OCFS2_I(inode)->ip_lock);
2932 OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
2933 di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features);
2934 spin_unlock(&OCFS2_I(inode)->ip_lock);
2935
2936 ocfs2_journal_dirty(ctxt->handle, inode_bh);
5aea1f0e
TM		 2937
2938 *ret_bh = new_bh;
2939 new_bh = NULL;
2940
2941end:
2942 brelse(new_bh);
2943 return ret;
2944}
2945
cf1d6c76
TY		 2946/*
2947 * ocfs2_xattr_block_set()
2948 *
2949 * Set, replace or remove an extended attribute into external block.
2950 *
2951 */
2952static int ocfs2_xattr_block_set(struct inode *inode,
2953 struct ocfs2_xattr_info *xi,
78f30c31
TM		 2954 struct ocfs2_xattr_search *xs,
2955 struct ocfs2_xattr_set_ctxt *ctxt)
cf1d6c76
TY		 2956{
2957 struct buffer_head *new_bh = NULL;
cf1d6c76 2958 struct ocfs2_xattr_block *xblk = NULL;
cf1d6c76 2959 int ret;
d3981544 2960 struct ocfs2_xa_loc loc;
cf1d6c76
TY		 2961
2962 if (!xs->xattr_bh) {
d3981544
JB		 2963 ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt,
2964 0, &new_bh);
5aea1f0e 2965 if (ret) {
cf1d6c76 2966 mlog_errno(ret);
85db90e7 2967 goto end;
cf1d6c76
TY		 2968 }
2969
cf1d6c76 2970 xs->xattr_bh = new_bh;
5aea1f0e 2971 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
cf1d6c76
TY		 2972 xs->header = &xblk->xb_attrs.xb_header;
2973 xs->base = (void *)xs->header;
2974 xs->end = (void *)xblk + inode->i_sb->s_blocksize;
2975 xs->here = xs->header->xh_entries;
01225596
TM		 2976 } else
2977 xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
2978
2979 if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) {
d3981544
JB		 2980 ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh,
2981 xs->not_found ? NULL : xs->here);
01225596 2982
d3981544
JB		 2983 ret = ocfs2_xa_set(&loc, xi, ctxt);
2984 if (!ret)
2985 xs->here = loc.xl_entry;
5f5261ac 2986 else if ((ret != -ENOSPC) || ctxt->set_abort)
01225596 2987 goto end;
d3981544
JB		 2988 else {
2989 ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
2990 if (ret)
2991 goto end;
2992 }
cf1d6c76
TY		 2993 }
2994
d3981544
JB		 2995 if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)
2996 ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
01225596
TM		 2997
2998end:
cf1d6c76
TY		 2999 return ret;
3000}
3001
78f30c31
TM		 3002/* Check whether the new xattr can be inserted into the inode. */
3003static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
3004 struct ocfs2_xattr_info *xi,
3005 struct ocfs2_xattr_search *xs)
3006{
78f30c31
TM		 3007 struct ocfs2_xattr_entry *last;
3008 int free, i;
3009 size_t min_offs = xs->end - xs->base;
3010
3011 if (!xs->header)
3012 return 0;
3013
3014 last = xs->header->xh_entries;
3015
3016 for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
3017 size_t offs = le16_to_cpu(last->xe_name_offset);
3018 if (offs < min_offs)
3019 min_offs = offs;
3020 last += 1;
3021 }
3022
4442f518 3023 free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP;
78f30c31
TM		 3024 if (free < 0)
3025 return 0;
3026
3027 BUG_ON(!xs->not_found);
3028
199799a3 3029 if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi)))
78f30c31
TM		 3030 return 1;
3031
3032 return 0;
3033}
3034
3035static int ocfs2_calc_xattr_set_need(struct inode *inode,
3036 struct ocfs2_dinode *di,
3037 struct ocfs2_xattr_info *xi,
3038 struct ocfs2_xattr_search *xis,
3039 struct ocfs2_xattr_search *xbs,
3040 int *clusters_need,
85db90e7
TM		 3041 int *meta_need,
3042 int *credits_need)
78f30c31
TM		 3043{
3044 int ret = 0, old_in_xb = 0;
85db90e7 3045 int clusters_add = 0, meta_add = 0, credits = 0;
78f30c31
TM		 3046 struct buffer_head *bh = NULL;
3047 struct ocfs2_xattr_block *xb = NULL;
3048 struct ocfs2_xattr_entry *xe = NULL;
3049 struct ocfs2_xattr_value_root *xv = NULL;
3050 char *base = NULL;
3051 int name_offset, name_len = 0;
3052 u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
6b240ff6 3053 xi->xi_value_len);
78f30c31
TM		 3054 u64 value_size;
3055
71d548a6
TM		 3056 /*
3057 * Calculate the clusters we need to write.
3058 * No matter whether we replace an old one or add a new one,
3059 * we need this for writing.
3060 */
6b240ff6 3061 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
71d548a6
TM		 3062 credits += new_clusters *
3063 ocfs2_clusters_to_blocks(inode->i_sb, 1);
3064
78f30c31 3065 if (xis->not_found && xbs->not_found) {
85db90e7
TM		 3066 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3067
6b240ff6 3068 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31 3069 clusters_add += new_clusters;
85db90e7 3070 credits += ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 3071 &def_xv.xv.xr_list);
85db90e7 3072 }
78f30c31
TM		 3073
3074 goto meta_guess;
3075 }
3076
3077 if (!xis->not_found) {
3078 xe = xis->here;
3079 name_offset = le16_to_cpu(xe->xe_name_offset);
3080 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3081 base = xis->base;
85db90e7 3082 credits += OCFS2_INODE_UPDATE_CREDITS;
78f30c31 3083 } else {
970e4936 3084 int i, block_off = 0;
78f30c31
TM		 3085 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
3086 xe = xbs->here;
3087 name_offset = le16_to_cpu(xe->xe_name_offset);
3088 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
3089 i = xbs->here - xbs->header->xh_entries;
3090 old_in_xb = 1;
3091
3092 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
fd68a894 3093 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
78f30c31
TM		 3094 bucket_xh(xbs->bucket),
3095 i, &block_off,
3096 &name_offset);
3097 base = bucket_block(xbs->bucket, block_off);
85db90e7
TM		 3098 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3099 } else {
78f30c31 3100 base = xbs->base;
85db90e7
TM		 3101 credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS;
3102 }
3103 }
3104
3105 /*
3106 * delete a xattr doesn't need metadata and cluster allocation.
3107 * so just calculate the credits and return.
3108 *
3109 * The credits for removing the value tree will be extended
3110 * by ocfs2_remove_extent itself.
3111 */
6b240ff6 3112 if (!xi->xi_value) {
85db90e7 3113 if (!ocfs2_xattr_is_local(xe))
a90714c1 3114 credits += ocfs2_remove_extent_credits(inode->i_sb);
85db90e7
TM		 3115
3116 goto out;
78f30c31
TM		 3117 }
3118
3119 /* do cluster allocation guess first. */
3120 value_size = le64_to_cpu(xe->xe_value_size);
3121
3122 if (old_in_xb) {
3123 /*
3124 * In xattr set, we always try to set the xe in inode first,
3125 * so if it can be inserted into inode successfully, the old
3126 * one will be removed from the xattr block, and this xattr
3127 * will be inserted into inode as a new xattr in inode.
3128 */
3129 if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
3130 clusters_add += new_clusters;
a90714c1 3131 credits += ocfs2_remove_extent_credits(inode->i_sb) +
85db90e7
TM		 3132 OCFS2_INODE_UPDATE_CREDITS;
3133 if (!ocfs2_xattr_is_local(xe))
3134 credits += ocfs2_calc_extend_credits(
3135 inode->i_sb,
06f9da6e 3136 &def_xv.xv.xr_list);
78f30c31
TM		 3137 goto out;
3138 }
3139 }
3140
6b240ff6 3141 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
78f30c31
TM		 3142 /* the new values will be stored outside. */
3143 u32 old_clusters = 0;
3144
3145 if (!ocfs2_xattr_is_local(xe)) {
3146 old_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
3147 value_size);
3148 xv = (struct ocfs2_xattr_value_root *)
3149 (base + name_offset + name_len);
97aff52a 3150 value_size = OCFS2_XATTR_ROOT_SIZE;
78f30c31
TM		 3151 } else
3152 xv = &def_xv.xv;
3153
85db90e7 3154 if (old_clusters >= new_clusters) {
a90714c1 3155 credits += ocfs2_remove_extent_credits(inode->i_sb);
78f30c31 3156 goto out;
85db90e7 3157 } else {
78f30c31
TM		 3158 meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
3159 clusters_add += new_clusters - old_clusters;
85db90e7 3160 credits += ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 3161 &xv->xr_list);
97aff52a
TM		 3162 if (value_size >= OCFS2_XATTR_ROOT_SIZE)
3163 goto out;
78f30c31
TM		 3164 }
3165 } else {
3166 /*
3167 * Now the new value will be stored inside. So if the new
3168 * value is smaller than the size of value root or the old
3169 * value, we don't need any allocation, otherwise we have
3170 * to guess metadata allocation.
3171 */
6b240ff6
JB		 3172 if ((ocfs2_xattr_is_local(xe) &&
3173 (value_size >= xi->xi_value_len)) ||
78f30c31 3174 (!ocfs2_xattr_is_local(xe) &&
6b240ff6 3175 OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len))
78f30c31
TM		 3176 goto out;
3177 }
3178
3179meta_guess:
3180 /* calculate metadata allocation. */
3181 if (di->i_xattr_loc) {
3182 if (!xbs->xattr_bh) {
4ae1d69b
JB		 3183 ret = ocfs2_read_xattr_block(inode,
3184 le64_to_cpu(di->i_xattr_loc),
3185 &bh);
78f30c31
TM		 3186 if (ret) {
3187 mlog_errno(ret);
3188 goto out;
3189 }
3190
3191 xb = (struct ocfs2_xattr_block *)bh->b_data;
3192 } else
3193 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
3194
90cb546c
TM		 3195 /*
3196 * If there is already an xattr tree, good, we can calculate
3197 * like other b-trees. Otherwise we may have the chance of
3198 * create a tree, the credit calculation is borrowed from
3199 * ocfs2_calc_extend_credits with root_el = NULL. And the
3200 * new tree will be cluster based, so no meta is needed.
3201 */
78f30c31
TM		 3202 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
3203 struct ocfs2_extent_list *el =
3204 &xb->xb_attrs.xb_root.xt_list;
3205 meta_add += ocfs2_extend_meta_needed(el);
85db90e7 3206 credits += ocfs2_calc_extend_credits(inode->i_sb,
06f9da6e 3207 el);
90cb546c
TM		 3208 } else
3209 credits += OCFS2_SUBALLOC_ALLOC + 1;
78f30c31
TM		 3210
3211 /*
3212 * This cluster will be used either for new bucket or for
3213 * new xattr block.
3214 * If the cluster size is the same as the bucket size, one
3215 * more is needed since we may need to extend the bucket
3216 * also.
3217 */
3218 clusters_add += 1;
85db90e7 3219 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 3220 if (OCFS2_XATTR_BUCKET_SIZE ==
85db90e7
TM		 3221 OCFS2_SB(inode->i_sb)->s_clustersize) {
3222 credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb);
78f30c31 3223 clusters_add += 1;
85db90e7
TM		 3224 }
3225 } else {
85db90e7 3226 credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
3ed2be71
TS		 3227 if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) {
3228 struct ocfs2_extent_list *el = &def_xv.xv.xr_list;
3229 meta_add += ocfs2_extend_meta_needed(el);
3230 credits += ocfs2_calc_extend_credits(inode->i_sb,
3231 el);
3232 } else {
3233 meta_add += 1;
3234 }
85db90e7 3235 }
78f30c31
TM		 3236out:
3237 if (clusters_need)
3238 *clusters_need = clusters_add;
3239 if (meta_need)
3240 *meta_need = meta_add;
85db90e7
TM		 3241 if (credits_need)
3242 *credits_need = credits;
78f30c31
TM		 3243 brelse(bh);
3244 return ret;
3245}
3246
3247static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
3248 struct ocfs2_dinode *di,
3249 struct ocfs2_xattr_info *xi,
3250 struct ocfs2_xattr_search *xis,
3251 struct ocfs2_xattr_search *xbs,
85db90e7 3252 struct ocfs2_xattr_set_ctxt *ctxt,
492a8a33 3253 int extra_meta,
85db90e7 3254 int *credits)
78f30c31
TM		 3255{
3256 int clusters_add, meta_add, ret;
3257 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
3258
3259 memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
3260
3261 ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
3262
3263 ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
85db90e7 3264 &clusters_add, &meta_add, credits);
78f30c31
TM		 3265 if (ret) {
3266 mlog_errno(ret);
3267 return ret;
3268 }
3269
492a8a33 3270 meta_add += extra_meta;
402b4183
TM		 3271 trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add,
3272 clusters_add, *credits);
78f30c31
TM		 3273
3274 if (meta_add) {
3275 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
3276 &ctxt->meta_ac);
3277 if (ret) {
3278 mlog_errno(ret);
3279 goto out;
3280 }
3281 }
3282
3283 if (clusters_add) {
3284 ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
3285 if (ret)
3286 mlog_errno(ret);
3287 }
3288out:
3289 if (ret) {
3290 if (ctxt->meta_ac) {
3291 ocfs2_free_alloc_context(ctxt->meta_ac);
3292 ctxt->meta_ac = NULL;
3293 }
3294
3295 /*
3296 * We cannot have an error and a non null ctxt->data_ac.
3297 */
3298 }
3299
3300 return ret;
3301}
3302
85db90e7
TM		 3303static int __ocfs2_xattr_set_handle(struct inode *inode,
3304 struct ocfs2_dinode *di,
3305 struct ocfs2_xattr_info *xi,
3306 struct ocfs2_xattr_search *xis,
3307 struct ocfs2_xattr_search *xbs,
3308 struct ocfs2_xattr_set_ctxt *ctxt)
3309{
9f868f16 3310 int ret = 0, credits, old_found;
85db90e7 3311
6b240ff6 3312 if (!xi->xi_value) {
85db90e7
TM		 3313 /* Remove existing extended attribute */
3314 if (!xis->not_found)
3315 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
3316 else if (!xbs->not_found)
3317 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
3318 } else {
3319 /* We always try to set extended attribute into inode first*/
3320 ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt);
3321 if (!ret && !xbs->not_found) {
3322 /*
3323 * If succeed and that extended attribute existing in
3324 * external block, then we will remove it.
3325 */
6b240ff6
JB		 3326 xi->xi_value = NULL;
3327 xi->xi_value_len = 0;
85db90e7 3328
9f868f16 3329 old_found = xis->not_found;
85db90e7
TM		 3330 xis->not_found = -ENODATA;
3331 ret = ocfs2_calc_xattr_set_need(inode,
3332 di,
3333 xi,
3334 xis,
3335 xbs,
3336 NULL,
3337 NULL,
3338 &credits);
9f868f16 3339 xis->not_found = old_found;
85db90e7
TM		 3340 if (ret) {
3341 mlog_errno(ret);
3342 goto out;
3343 }
3344
c901fb00 3345 ret = ocfs2_extend_trans(ctxt->handle, credits);
85db90e7
TM		 3346 if (ret) {
3347 mlog_errno(ret);
3348 goto out;
3349 }
3350 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
5f5261ac 3351 } else if ((ret == -ENOSPC) && !ctxt->set_abort) {
85db90e7
TM		 3352 if (di->i_xattr_loc && !xbs->xattr_bh) {
3353 ret = ocfs2_xattr_block_find(inode,
6b240ff6
JB		 3354 xi->xi_name_index,
3355 xi->xi_name, xbs);
85db90e7
TM		 3356 if (ret)
3357 goto out;
3358
9f868f16 3359 old_found = xis->not_found;
85db90e7
TM		 3360 xis->not_found = -ENODATA;
3361 ret = ocfs2_calc_xattr_set_need(inode,
3362 di,
3363 xi,
3364 xis,
3365 xbs,
3366 NULL,
3367 NULL,
3368 &credits);
9f868f16 3369 xis->not_found = old_found;
85db90e7
TM		 3370 if (ret) {
3371 mlog_errno(ret);
3372 goto out;
3373 }
3374
c901fb00 3375 ret = ocfs2_extend_trans(ctxt->handle, credits);
85db90e7
TM		 3376 if (ret) {
3377 mlog_errno(ret);
3378 goto out;
3379 }
3380 }
3381 /*
3382 * If no space in inode, we will set extended attribute
3383 * into external block.
3384 */
3385 ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt);
3386 if (ret)
3387 goto out;
3388 if (!xis->not_found) {
3389 /*
3390 * If succeed and that extended attribute
3391 * existing in inode, we will remove it.
3392 */
6b240ff6
JB		 3393 xi->xi_value = NULL;
3394 xi->xi_value_len = 0;
85db90e7
TM		 3395 xbs->not_found = -ENODATA;
3396 ret = ocfs2_calc_xattr_set_need(inode,
3397 di,
3398 xi,
3399 xis,
3400 xbs,
3401 NULL,
3402 NULL,
3403 &credits);
3404 if (ret) {
3405 mlog_errno(ret);
3406 goto out;
3407 }
3408
c901fb00 3409 ret = ocfs2_extend_trans(ctxt->handle, credits);
85db90e7
TM		 3410 if (ret) {
3411 mlog_errno(ret);
3412 goto out;
3413 }
3414 ret = ocfs2_xattr_ibody_set(inode, xi,
3415 xis, ctxt);
3416 }
3417 }
3418 }
3419
4b3f6209
TM		 3420 if (!ret) {
3421 /* Update inode ctime. */
0cf2f763 3422 ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode),
89a907af
TM		 3423 xis->inode_bh,
3424 OCFS2_JOURNAL_ACCESS_WRITE);
4b3f6209
TM		 3425 if (ret) {
3426 mlog_errno(ret);
3427 goto out;
3428 }
3429
078cd827 3430 inode->i_ctime = current_time(inode);
4b3f6209
TM		 3431 di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
3432 di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
3433 ocfs2_journal_dirty(ctxt->handle, xis->inode_bh);
3434 }
85db90e7
TM		 3435out:
3436 return ret;
3437}
3438
6c3faba4
TY		 3439/*
3440 * This function only called duing creating inode
3441 * for init security/acl xattrs of the new inode.
008aafaf 3442 * All transanction credits have been reserved in mknod.
6c3faba4
TY		 3443 */
3444int ocfs2_xattr_set_handle(handle_t *handle,
3445 struct inode *inode,
3446 struct buffer_head *di_bh,
3447 int name_index,
3448 const char *name,
3449 const void *value,
3450 size_t value_len,
3451 int flags,
3452 struct ocfs2_alloc_context *meta_ac,
3453 struct ocfs2_alloc_context *data_ac)
3454{
3455 struct ocfs2_dinode *di;
3456 int ret;
3457
3458 struct ocfs2_xattr_info xi = {
6b240ff6
JB		 3459 .xi_name_index = name_index,
3460 .xi_name = name,
18853b95 3461 .xi_name_len = strlen(name),
6b240ff6
JB		 3462 .xi_value = value,
3463 .xi_value_len = value_len,
6c3faba4
TY		 3464 };
3465
3466 struct ocfs2_xattr_search xis = {
3467 .not_found = -ENODATA,
3468 };
3469
3470 struct ocfs2_xattr_search xbs = {
3471 .not_found = -ENODATA,
3472 };
3473
3474 struct ocfs2_xattr_set_ctxt ctxt = {
3475 .handle = handle,
3476 .meta_ac = meta_ac,
3477 .data_ac = data_ac,
3478 };
3479
3480 if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb)))
3481 return -EOPNOTSUPP;
3482
008aafaf
TY		 3483 /*
3484 * In extreme situation, may need xattr bucket when
3485 * block size is too small. And we have already reserved
3486 * the credits for bucket in mknod.
3487 */
3488 if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) {
3489 xbs.bucket = ocfs2_xattr_bucket_new(inode);
3490 if (!xbs.bucket) {
3491 mlog_errno(-ENOMEM);
3492 return -ENOMEM;
3493 }
3494 }
3495
6c3faba4
TY		 3496 xis.inode_bh = xbs.inode_bh = di_bh;
3497 di = (struct ocfs2_dinode *)di_bh->b_data;
3498
3499 down_write(&OCFS2_I(inode)->ip_xattr_sem);
3500
3501 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
3502 if (ret)
3503 goto cleanup;
3504 if (xis.not_found) {
3505 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
3506 if (ret)
3507 goto cleanup;
3508 }
3509
3510 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
3511
3512cleanup:
3513 up_write(&OCFS2_I(inode)->ip_xattr_sem);
3514 brelse(xbs.xattr_bh);
008aafaf 3515 ocfs2_xattr_bucket_free(xbs.bucket);
6c3faba4
TY		 3516
3517 return ret;
3518}
3519
cf1d6c76
TY		 3520/*
3521 * ocfs2_xattr_set()
3522 *
3523 * Set, replace or remove an extended attribute for this inode.
3524 * value is NULL to remove an existing extended attribute, else either
3525 * create or replace an extended attribute.
3526 */
3527int ocfs2_xattr_set(struct inode *inode,
3528 int name_index,
3529 const char *name,
3530 const void *value,
3531 size_t value_len,
3532 int flags)
3533{
3534 struct buffer_head *di_bh = NULL;
3535 struct ocfs2_dinode *di;
8818efaa 3536 int ret, credits, had_lock, ref_meta = 0, ref_credits = 0;
78f30c31 3537 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
85db90e7 3538 struct inode *tl_inode = osb->osb_tl_inode;
6ea437a3 3539 struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, NULL, };
492a8a33 3540 struct ocfs2_refcount_tree *ref_tree = NULL;
8818efaa 3541 struct ocfs2_lock_holder oh;
cf1d6c76
TY		 3542
3543 struct ocfs2_xattr_info xi = {
6b240ff6
JB		 3544 .xi_name_index = name_index,
3545 .xi_name = name,
18853b95 3546 .xi_name_len = strlen(name),
6b240ff6
JB		 3547 .xi_value = value,
3548 .xi_value_len = value_len,
cf1d6c76
TY		 3549 };
3550
3551 struct ocfs2_xattr_search xis = {
3552 .not_found = -ENODATA,
3553 };
3554
3555 struct ocfs2_xattr_search xbs = {
3556 .not_found = -ENODATA,
3557 };
3558
1119d3c0 3559 if (!ocfs2_supports_xattr(osb))
8154da3d
TY		 3560 return -EOPNOTSUPP;
3561
ba937127
JB		 3562 /*
3563 * Only xbs will be used on indexed trees. xis doesn't need a
3564 * bucket.
3565 */
3566 xbs.bucket = ocfs2_xattr_bucket_new(inode);
3567 if (!xbs.bucket) {
3568 mlog_errno(-ENOMEM);
3569 return -ENOMEM;
3570 }
3571
8818efaa
ER		 3572 had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 1, &oh);
3573 if (had_lock < 0) {
3574 ret = had_lock;
cf1d6c76 3575 mlog_errno(ret);
ba937127 3576 goto cleanup_nolock;
cf1d6c76
TY		 3577 }
3578 xis.inode_bh = xbs.inode_bh = di_bh;
3579 di = (struct ocfs2_dinode *)di_bh->b_data;
3580
3581 down_write(&OCFS2_I(inode)->ip_xattr_sem);
3582 /*
3583 * Scan inode and external block to find the same name
25985edc 3584 * extended attribute and collect search information.
cf1d6c76
TY		 3585 */
3586 ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis);
3587 if (ret)
3588 goto cleanup;
3589 if (xis.not_found) {
3590 ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs);
3591 if (ret)
3592 goto cleanup;
3593 }
3594
3595 if (xis.not_found && xbs.not_found) {
3596 ret = -ENODATA;
3597 if (flags & XATTR_REPLACE)
3598 goto cleanup;
3599 ret = 0;
3600 if (!value)
3601 goto cleanup;
3602 } else {
3603 ret = -EEXIST;
3604 if (flags & XATTR_CREATE)
3605 goto cleanup;
3606 }
3607
25985edc 3608 /* Check whether the value is refcounted and do some preparation. */
84e40080 3609 if (ocfs2_is_refcount_inode(inode) &&
492a8a33
TM		 3610 (!xis.not_found || !xbs.not_found)) {
3611 ret = ocfs2_prepare_refcount_xattr(inode, di, &xi,
3612 &xis, &xbs, &ref_tree,
3613 &ref_meta, &ref_credits);
3614 if (ret) {
3615 mlog_errno(ret);
3616 goto cleanup;
3617 }
3618 }
85db90e7 3619
5955102c 3620 inode_lock(tl_inode);
85db90e7
TM		 3621
3622 if (ocfs2_truncate_log_needs_flush(osb)) {
3623 ret = __ocfs2_flush_truncate_log(osb);
3624 if (ret < 0) {
5955102c 3625 inode_unlock(tl_inode);
85db90e7
TM		 3626 mlog_errno(ret);
3627 goto cleanup;
3628 }
3629 }
5955102c 3630 inode_unlock(tl_inode);
85db90e7
TM		 3631
3632 ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis,
492a8a33 3633 &xbs, &ctxt, ref_meta, &credits);
78f30c31
TM		 3634 if (ret) {
3635 mlog_errno(ret);
3636 goto cleanup;
3637 }
3638
4b3f6209
TM		 3639 /* we need to update inode's ctime field, so add credit for it. */
3640 credits += OCFS2_INODE_UPDATE_CREDITS;
492a8a33 3641 ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits);
85db90e7
TM		 3642 if (IS_ERR(ctxt.handle)) {
3643 ret = PTR_ERR(ctxt.handle);
3644 mlog_errno(ret);
6ea437a3 3645 goto out_free_ac;
cf1d6c76 3646 }
85db90e7
TM		 3647
3648 ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt);
6fdb702d 3649 ocfs2_update_inode_fsync_trans(ctxt.handle, inode, 0);
85db90e7
TM		 3650
3651 ocfs2_commit_trans(osb, ctxt.handle);
3652
6ea437a3 3653out_free_ac:
78f30c31
TM		 3654 if (ctxt.data_ac)
3655 ocfs2_free_alloc_context(ctxt.data_ac);
3656 if (ctxt.meta_ac)
3657 ocfs2_free_alloc_context(ctxt.meta_ac);
3658 if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
3659 ocfs2_schedule_truncate_log_flush(osb, 1);
3660 ocfs2_run_deallocs(osb, &ctxt.dealloc);
8b2c0dba 3661
cf1d6c76 3662cleanup:
492a8a33
TM		 3663 if (ref_tree)
3664 ocfs2_unlock_refcount_tree(osb, ref_tree, 1);
cf1d6c76 3665 up_write(&OCFS2_I(inode)->ip_xattr_sem);
8b2c0dba
TM		 3666 if (!value && !ret) {
3667 ret = ocfs2_try_remove_refcount_tree(inode, di_bh);
3668 if (ret)
3669 mlog_errno(ret);
3670 }
8818efaa 3671 ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock);
ba937127 3672cleanup_nolock:
cf1d6c76
TY		 3673 brelse(di_bh);
3674 brelse(xbs.xattr_bh);
ba937127 3675 ocfs2_xattr_bucket_free(xbs.bucket);
cf1d6c76
TY		 3676
3677 return ret;
3678}
3679
0c044f0b
TM		 3680/*
3681 * Find the xattr extent rec which may contains name_hash.
3682 * e_cpos will be the first name hash of the xattr rec.
3683 * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list.
3684 */
3685static int ocfs2_xattr_get_rec(struct inode *inode,
3686 u32 name_hash,
3687 u64 *p_blkno,
3688 u32 *e_cpos,
3689 u32 *num_clusters,
3690 struct ocfs2_extent_list *el)
3691{
3692 int ret = 0, i;
3693 struct buffer_head *eb_bh = NULL;
3694 struct ocfs2_extent_block *eb;
3695 struct ocfs2_extent_rec *rec = NULL;
3696 u64 e_blkno = 0;
3697
3698 if (el->l_tree_depth) {
facdb77f
JB		 3699 ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash,
3700 &eb_bh);
0c044f0b
TM		 3701 if (ret) {
3702 mlog_errno(ret);
3703 goto out;
3704 }
3705
3706 eb = (struct ocfs2_extent_block *) eb_bh->b_data;
3707 el = &eb->h_list;
3708
3709 if (el->l_tree_depth) {
17a5b9ab 3710 ret = ocfs2_error(inode->i_sb,
7ecef14a
JP		 3711 "Inode %lu has non zero tree depth in xattr tree block %llu\n",
3712 inode->i_ino,
3713 (unsigned long long)eb_bh->b_blocknr);
0c044f0b
TM		 3714 goto out;
3715 }
3716 }
3717
3718 for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) {
3719 rec = &el->l_recs[i];
3720
3721 if (le32_to_cpu(rec->e_cpos) <= name_hash) {
3722 e_blkno = le64_to_cpu(rec->e_blkno);
3723 break;
3724 }
3725 }
3726
3727 if (!e_blkno) {
7ecef14a
JP		 3728 ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in xattr\n",
3729 inode->i_ino,
3730 le32_to_cpu(rec->e_cpos),
3731 ocfs2_rec_clusters(el, rec));
0c044f0b
TM		 3732 goto out;
3733 }
3734
3735 *p_blkno = le64_to_cpu(rec->e_blkno);
3736 *num_clusters = le16_to_cpu(rec->e_leaf_clusters);
3737 if (e_cpos)
3738 *e_cpos = le32_to_cpu(rec->e_cpos);
3739out:
3740 brelse(eb_bh);
3741 return ret;
3742}
3743
3744typedef int (xattr_bucket_func)(struct inode *inode,
3745 struct ocfs2_xattr_bucket *bucket,
3746 void *para);
3747
589dc260 3748static int ocfs2_find_xe_in_bucket(struct inode *inode,
e2356a3f 3749 struct ocfs2_xattr_bucket *bucket,
589dc260
TM		 3750 int name_index,
3751 const char *name,
3752 u32 name_hash,
3753 u16 *xe_index,
3754 int *found)
3755{
3756 int i, ret = 0, cmp = 1, block_off, new_offset;
e2356a3f 3757 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
589dc260
TM		 3758 size_t name_len = strlen(name);
3759 struct ocfs2_xattr_entry *xe = NULL;
589dc260
TM		 3760 char *xe_name;
3761
3762 /*
3763 * We don't use binary search in the bucket because there
3764 * may be multiple entries with the same name hash.
3765 */
3766 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
3767 xe = &xh->xh_entries[i];
3768
3769 if (name_hash > le32_to_cpu(xe->xe_name_hash))
3770 continue;
3771 else if (name_hash < le32_to_cpu(xe->xe_name_hash))
3772 break;
3773
3774 cmp = name_index - ocfs2_xattr_get_type(xe);
3775 if (!cmp)
3776 cmp = name_len - xe->xe_name_len;
3777 if (cmp)
3778 continue;
3779
fd68a894 3780 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
589dc260
TM		 3781 xh,
3782 i,
3783 &block_off,
3784 &new_offset);
3785 if (ret) {
3786 mlog_errno(ret);
3787 break;
3788 }
3789
970e4936 3790
e2356a3f
JB		 3791 xe_name = bucket_block(bucket, block_off) + new_offset;
3792 if (!memcmp(name, xe_name, name_len)) {
589dc260
TM		 3793 *xe_index = i;
3794 *found = 1;
3795 ret = 0;
3796 break;
3797 }
3798 }
3799
3800 return ret;
3801}
3802
3803/*
3804 * Find the specified xattr entry in a series of buckets.
3805 * This series start from p_blkno and last for num_clusters.
3806 * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains
3807 * the num of the valid buckets.
3808 *
3809 * Return the buffer_head this xattr should reside in. And if the xattr's
3810 * hash is in the gap of 2 buckets, return the lower bucket.
3811 */
3812static int ocfs2_xattr_bucket_find(struct inode *inode,
3813 int name_index,
3814 const char *name,
3815 u32 name_hash,
3816 u64 p_blkno,
3817 u32 first_hash,
3818 u32 num_clusters,
3819 struct ocfs2_xattr_search *xs)
3820{
3821 int ret, found = 0;
589dc260
TM		 3822 struct ocfs2_xattr_header *xh = NULL;
3823 struct ocfs2_xattr_entry *xe = NULL;
3824 u16 index = 0;
3825 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
3826 int low_bucket = 0, bucket, high_bucket;
e2356a3f 3827 struct ocfs2_xattr_bucket *search;
e2356a3f 3828 u64 blkno, lower_blkno = 0;
589dc260 3829
e2356a3f
JB		 3830 search = ocfs2_xattr_bucket_new(inode);
3831 if (!search) {
3832 ret = -ENOMEM;
3833 mlog_errno(ret);
3834 goto out;
3835 }
3836
3837 ret = ocfs2_read_xattr_bucket(search, p_blkno);
589dc260
TM		 3838 if (ret) {
3839 mlog_errno(ret);
3840 goto out;
3841 }
3842
e2356a3f 3843 xh = bucket_xh(search);
589dc260 3844 high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1;
589dc260 3845 while (low_bucket <= high_bucket) {
e2356a3f 3846 ocfs2_xattr_bucket_relse(search);
589dc260 3847
e2356a3f 3848 bucket = (low_bucket + high_bucket) / 2;
589dc260 3849 blkno = p_blkno + bucket * blk_per_bucket;
e2356a3f 3850 ret = ocfs2_read_xattr_bucket(search, blkno);
589dc260
TM		 3851 if (ret) {
3852 mlog_errno(ret);
3853 goto out;
3854 }
3855
e2356a3f 3856 xh = bucket_xh(search);
589dc260
TM		 3857 xe = &xh->xh_entries[0];
3858 if (name_hash < le32_to_cpu(xe->xe_name_hash)) {
3859 high_bucket = bucket - 1;
3860 continue;
3861 }
3862
3863 /*
3864 * Check whether the hash of the last entry in our
5a095611
TM		 3865 * bucket is larger than the search one. for an empty
3866 * bucket, the last one is also the first one.
589dc260 3867 */
5a095611
TM		 3868 if (xh->xh_count)
3869 xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1];
3870
e2356a3f
JB		 3871 /* record lower_blkno which may be the insert place. */
3872 lower_blkno = blkno;
589dc260
TM		 3873
3874 if (name_hash > le32_to_cpu(xe->xe_name_hash)) {
3875 low_bucket = bucket + 1;
3876 continue;
3877 }
3878
3879 /* the searched xattr should reside in this bucket if exists. */
e2356a3f 3880 ret = ocfs2_find_xe_in_bucket(inode, search,
589dc260
TM		 3881 name_index, name, name_hash,
3882 &index, &found);
3883 if (ret) {
3884 mlog_errno(ret);
3885 goto out;
3886 }
3887 break;
3888 }
3889
3890 /*
3891 * Record the bucket we have found.
3892 * When the xattr's hash value is in the gap of 2 buckets, we will
3893 * always set it to the previous bucket.
3894 */
e2356a3f
JB		 3895 if (!lower_blkno)
3896 lower_blkno = p_blkno;
3897
3898 /* This should be in cache - we just read it during the search */
3899 ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno);
3900 if (ret) {
3901 mlog_errno(ret);
3902 goto out;
589dc260 3903 }
589dc260 3904
ba937127
JB		 3905 xs->header = bucket_xh(xs->bucket);
3906 xs->base = bucket_block(xs->bucket, 0);
589dc260
TM		 3907 xs->end = xs->base + inode->i_sb->s_blocksize;
3908
3909 if (found) {
589dc260 3910 xs->here = &xs->header->xh_entries[index];
402b4183
TM		 3911 trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno,
3912 name, name_index, name_hash,
3913 (unsigned long long)bucket_blkno(xs->bucket),
3914 index);
589dc260
TM		 3915 } else
3916 ret = -ENODATA;
3917
3918out:
e2356a3f 3919 ocfs2_xattr_bucket_free(search);
589dc260
TM		 3920 return ret;
3921}
3922
3923static int ocfs2_xattr_index_block_find(struct inode *inode,
3924 struct buffer_head *root_bh,
3925 int name_index,
3926 const char *name,
3927 struct ocfs2_xattr_search *xs)
3928{
3929 int ret;
3930 struct ocfs2_xattr_block *xb =
3931 (struct ocfs2_xattr_block *)root_bh->b_data;
3932 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
3933 struct ocfs2_extent_list *el = &xb_root->xt_list;
3934 u64 p_blkno = 0;
3935 u32 first_hash, num_clusters = 0;
2057e5c6 3936 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
589dc260
TM		 3937
3938 if (le16_to_cpu(el->l_next_free_rec) == 0)
3939 return -ENODATA;
3940
402b4183
TM		 3941 trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno,
3942 name, name_index, name_hash,
3943 (unsigned long long)root_bh->b_blocknr,
3944 -1);
589dc260
TM		 3945
3946 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash,
3947 &num_clusters, el);
3948 if (ret) {
3949 mlog_errno(ret);
3950 goto out;
3951 }
3952
3953 BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash);
3954
402b4183
TM		 3955 trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno,
3956 name, name_index, first_hash,
3957 (unsigned long long)p_blkno,
3958 num_clusters);
589dc260
TM		 3959
3960 ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash,
3961 p_blkno, first_hash, num_clusters, xs);
3962
3963out:
3964 return ret;
3965}
3966
0c044f0b
TM		 3967static int ocfs2_iterate_xattr_buckets(struct inode *inode,
3968 u64 blkno,
3969 u32 clusters,
3970 xattr_bucket_func *func,
3971 void *para)
3972{
6dde41d9 3973 int i, ret = 0;
0c044f0b
TM		 3974 u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
3975 u32 num_buckets = clusters * bpc;
ba937127 3976 struct ocfs2_xattr_bucket *bucket;
0c044f0b 3977
ba937127
JB		 3978 bucket = ocfs2_xattr_bucket_new(inode);
3979 if (!bucket) {
3980 mlog_errno(-ENOMEM);
3981 return -ENOMEM;
3982 }
0c044f0b 3983
402b4183
TM		 3984 trace_ocfs2_iterate_xattr_buckets(
3985 (unsigned long long)OCFS2_I(inode)->ip_blkno,
3986 (unsigned long long)blkno, clusters);
0c044f0b 3987
ba937127
JB		 3988 for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) {
3989 ret = ocfs2_read_xattr_bucket(bucket, blkno);
0c044f0b
TM		 3990 if (ret) {
3991 mlog_errno(ret);
ba937127 3992 break;
0c044f0b
TM		 3993 }
3994
0c044f0b
TM		 3995 /*
3996 * The real bucket num in this series of blocks is stored
3997 * in the 1st bucket.
3998 */
3999 if (i == 0)
ba937127 4000 num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets);
0c044f0b 4001
402b4183 4002 trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno,
ba937127 4003 le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash));
0c044f0b 4004 if (func) {
ba937127 4005 ret = func(inode, bucket, para);
a46fa684 4006 if (ret && ret != -ERANGE)
0c044f0b 4007 mlog_errno(ret);
ba937127 4008 /* Fall through to bucket_relse() */
0c044f0b
TM		 4009 }
4010
ba937127
JB		 4011 ocfs2_xattr_bucket_relse(bucket);
4012 if (ret)
4013 break;
0c044f0b
TM		 4014 }
4015
ba937127 4016 ocfs2_xattr_bucket_free(bucket);
0c044f0b
TM		 4017 return ret;
4018}
4019
4020struct ocfs2_xattr_tree_list {
4021 char *buffer;
4022 size_t buffer_size;
936b8834 4023 size_t result;
0c044f0b
TM		 4024};
4025
fd68a894 4026static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb,
0c044f0b
TM		 4027 struct ocfs2_xattr_header *xh,
4028 int index,
4029 int *block_off,
4030 int *new_offset)
4031{
4032 u16 name_offset;
4033
4034 if (index < 0 || index >= le16_to_cpu(xh->xh_count))
4035 return -EINVAL;
4036
4037 name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset);
4038
fd68a894
TM		 4039 *block_off = name_offset >> sb->s_blocksize_bits;
4040 *new_offset = name_offset % sb->s_blocksize;
0c044f0b
TM		 4041
4042 return 0;
4043}
4044
4045static int ocfs2_list_xattr_bucket(struct inode *inode,
4046 struct ocfs2_xattr_bucket *bucket,
4047 void *para)
4048{
936b8834 4049 int ret = 0, type;
0c044f0b 4050 struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
0c044f0b 4051 int i, block_off, new_offset;
1046cb11 4052 const char *name;
0c044f0b 4053
3e632946
JB		 4054 for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
4055 struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
936b8834 4056 type = ocfs2_xattr_get_type(entry);
0c044f0b 4057
1046cb11
AG		 4058 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
4059 bucket_xh(bucket),
4060 i,
4061 &block_off,
4062 &new_offset);
4063 if (ret)
4064 break;
936b8834 4065
1046cb11
AG		 4066 name = (const char *)bucket_block(bucket, block_off) +
4067 new_offset;
4068 ret = ocfs2_xattr_list_entry(inode->i_sb,
4069 xl->buffer,
4070 xl->buffer_size,
4071 &xl->result,
4072 type, name,
4073 entry->xe_name_len);
4074 if (ret)
4075 break;
0c044f0b
TM		 4076 }
4077
4078 return ret;
4079}
4080
47bca495
TM		 4081static int ocfs2_iterate_xattr_index_block(struct inode *inode,
4082 struct buffer_head *blk_bh,
4083 xattr_tree_rec_func *rec_func,
4084 void *para)
0c044f0b 4085{
47bca495
TM		 4086 struct ocfs2_xattr_block *xb =
4087 (struct ocfs2_xattr_block *)blk_bh->b_data;
4088 struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list;
0c044f0b
TM		 4089 int ret = 0;
4090 u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0;
4091 u64 p_blkno = 0;
0c044f0b 4092
47bca495 4093 if (!el->l_next_free_rec || !rec_func)
0c044f0b
TM		 4094 return 0;
4095
4096 while (name_hash > 0) {
4097 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno,
4098 &e_cpos, &num_clusters, el);
4099 if (ret) {
4100 mlog_errno(ret);
47bca495 4101 break;
0c044f0b
TM		 4102 }
4103
47bca495
TM		 4104 ret = rec_func(inode, blk_bh, p_blkno, e_cpos,
4105 num_clusters, para);
0c044f0b 4106 if (ret) {
a46fa684
TM		 4107 if (ret != -ERANGE)
4108 mlog_errno(ret);
47bca495 4109 break;
0c044f0b
TM		 4110 }
4111
4112 if (e_cpos == 0)
4113 break;
4114
4115 name_hash = e_cpos - 1;
4116 }
4117
47bca495
TM		 4118 return ret;
4119
4120}
4121
4122static int ocfs2_list_xattr_tree_rec(struct inode *inode,
4123 struct buffer_head *root_bh,
4124 u64 blkno, u32 cpos, u32 len, void *para)
4125{
4126 return ocfs2_iterate_xattr_buckets(inode, blkno, len,
4127 ocfs2_list_xattr_bucket, para);
4128}
4129
4130static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
4131 struct buffer_head *blk_bh,
4132 char *buffer,
4133 size_t buffer_size)
4134{
4135 int ret;
4136 struct ocfs2_xattr_tree_list xl = {
4137 .buffer = buffer,
4138 .buffer_size = buffer_size,
4139 .result = 0,
4140 };
4141
4142 ret = ocfs2_iterate_xattr_index_block(inode, blk_bh,
4143 ocfs2_list_xattr_tree_rec, &xl);
4144 if (ret) {
4145 mlog_errno(ret);
4146 goto out;
4147 }
4148
936b8834 4149 ret = xl.result;
0c044f0b
TM		 4150out:
4151 return ret;
4152}
01225596
TM		 4153
4154static int cmp_xe(const void *a, const void *b)
4155{
4156 const struct ocfs2_xattr_entry *l = a, *r = b;
4157 u32 l_hash = le32_to_cpu(l->xe_name_hash);
4158 u32 r_hash = le32_to_cpu(r->xe_name_hash);
4159
4160 if (l_hash > r_hash)
4161 return 1;
4162 if (l_hash < r_hash)
4163 return -1;
4164 return 0;
4165}
4166
4167static void swap_xe(void *a, void *b, int size)
4168{
4169 struct ocfs2_xattr_entry *l = a, *r = b, tmp;
4170
4171 tmp = *l;
4172 memcpy(l, r, sizeof(struct ocfs2_xattr_entry));
4173 memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry));
4174}
4175
4176/*
4177 * When the ocfs2_xattr_block is filled up, new bucket will be created
4178 * and all the xattr entries will be moved to the new bucket.
178eeac3
JB		 4179 * The header goes at the start of the bucket, and the names+values are
4180 * filled from the end. This is why *target starts as the last buffer.
01225596
TM		 4181 * Note: we need to sort the entries since they are not saved in order
4182 * in the ocfs2_xattr_block.
4183 */
4184static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode,
4185 struct buffer_head *xb_bh,
178eeac3 4186 struct ocfs2_xattr_bucket *bucket)
01225596
TM		 4187{
4188 int i, blocksize = inode->i_sb->s_blocksize;
178eeac3 4189 int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596
TM		 4190 u16 offset, size, off_change;
4191 struct ocfs2_xattr_entry *xe;
4192 struct ocfs2_xattr_block *xb =
4193 (struct ocfs2_xattr_block *)xb_bh->b_data;
4194 struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header;
178eeac3 4195 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 4196 u16 count = le16_to_cpu(xb_xh->xh_count);
178eeac3
JB		 4197 char *src = xb_bh->b_data;
4198 char *target = bucket_block(bucket, blks - 1);
01225596 4199
402b4183
TM		 4200 trace_ocfs2_cp_xattr_block_to_bucket_begin(
4201 (unsigned long long)xb_bh->b_blocknr,
4202 (unsigned long long)bucket_blkno(bucket));
178eeac3
JB		 4203
4204 for (i = 0; i < blks; i++)
4205 memset(bucket_block(bucket, i), 0, blocksize);
01225596 4206
01225596
TM		 4207 /*
4208 * Since the xe_name_offset is based on ocfs2_xattr_header,
4209 * there is a offset change corresponding to the change of
4210 * ocfs2_xattr_header's position.
4211 */
4212 off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
4213 xe = &xb_xh->xh_entries[count - 1];
4214 offset = le16_to_cpu(xe->xe_name_offset) + off_change;
4215 size = blocksize - offset;
4216
4217 /* copy all the names and values. */
01225596
TM		 4218 memcpy(target + offset, src + offset, size);
4219
4220 /* Init new header now. */
4221 xh->xh_count = xb_xh->xh_count;
4222 xh->xh_num_buckets = cpu_to_le16(1);
4223 xh->xh_name_value_len = cpu_to_le16(size);
4224 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size);
4225
4226 /* copy all the entries. */
178eeac3 4227 target = bucket_block(bucket, 0);
01225596
TM		 4228 offset = offsetof(struct ocfs2_xattr_header, xh_entries);
4229 size = count * sizeof(struct ocfs2_xattr_entry);
4230 memcpy(target + offset, (char *)xb_xh + offset, size);
4231
4232 /* Change the xe offset for all the xe because of the move. */
4233 off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize +
4234 offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
4235 for (i = 0; i < count; i++)
4236 le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change);
4237
402b4183 4238 trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change);
01225596
TM		 4239
4240 sort(target + offset, count, sizeof(struct ocfs2_xattr_entry),
4241 cmp_xe, swap_xe);
4242}
4243
4244/*
4245 * After we move xattr from block to index btree, we have to
4246 * update ocfs2_xattr_search to the new xe and base.
4247 *
4248 * When the entry is in xattr block, xattr_bh indicates the storage place.
4249 * While if the entry is in index b-tree, "bucket" indicates the
4250 * real place of the xattr.
4251 */
178eeac3
JB		 4252static void ocfs2_xattr_update_xattr_search(struct inode *inode,
4253 struct ocfs2_xattr_search *xs,
4254 struct buffer_head *old_bh)
01225596 4255{
01225596
TM		 4256 char *buf = old_bh->b_data;
4257 struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf;
4258 struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header;
178eeac3 4259 int i;
01225596 4260
ba937127 4261 xs->header = bucket_xh(xs->bucket);
178eeac3 4262 xs->base = bucket_block(xs->bucket, 0);
01225596
TM		 4263 xs->end = xs->base + inode->i_sb->s_blocksize;
4264
178eeac3
JB		 4265 if (xs->not_found)
4266 return;
01225596 4267
178eeac3
JB		 4268 i = xs->here - old_xh->xh_entries;
4269 xs->here = &xs->header->xh_entries[i];
01225596
TM		 4270}
4271
4272static int ocfs2_xattr_create_index_block(struct inode *inode,
78f30c31
TM		 4273 struct ocfs2_xattr_search *xs,
4274 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 4275{
85db90e7 4276 int ret;
01225596
TM		 4277 u32 bit_off, len;
4278 u64 blkno;
85db90e7 4279 handle_t *handle = ctxt->handle;
01225596 4280 struct ocfs2_inode_info *oi = OCFS2_I(inode);
01225596
TM		 4281 struct buffer_head *xb_bh = xs->xattr_bh;
4282 struct ocfs2_xattr_block *xb =
4283 (struct ocfs2_xattr_block *)xb_bh->b_data;
4284 struct ocfs2_xattr_tree_root *xr;
4285 u16 xb_flags = le16_to_cpu(xb->xb_flags);
01225596 4286
402b4183
TM		 4287 trace_ocfs2_xattr_create_index_block_begin(
4288 (unsigned long long)xb_bh->b_blocknr);
01225596
TM		 4289
4290 BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
178eeac3 4291 BUG_ON(!xs->bucket);
01225596 4292
01225596
TM		 4293 /*
4294 * XXX:
4295 * We can use this lock for now, and maybe move to a dedicated mutex
4296 * if performance becomes a problem later.
4297 */
4298 down_write(&oi->ip_alloc_sem);
4299
0cf2f763 4300 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh,
84008972 4301 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4302 if (ret) {
4303 mlog_errno(ret);
85db90e7 4304 goto out;
01225596
TM		 4305 }
4306
1ed9b777 4307 ret = __ocfs2_claim_clusters(handle, ctxt->data_ac,
78f30c31 4308 1, 1, &bit_off, &len);
01225596
TM		 4309 if (ret) {
4310 mlog_errno(ret);
85db90e7 4311 goto out;
01225596
TM		 4312 }
4313
4314 /*
4315 * The bucket may spread in many blocks, and
4316 * we will only touch the 1st block and the last block
4317 * in the whole bucket(one for entry and one for data).
4318 */
4319 blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off);
4320
402b4183 4321 trace_ocfs2_xattr_create_index_block((unsigned long long)blkno);
01225596 4322
9c339255 4323 ret = ocfs2_init_xattr_bucket(xs->bucket, blkno, 1);
178eeac3 4324 if (ret) {
01225596 4325 mlog_errno(ret);
85db90e7 4326 goto out;
01225596
TM		 4327 }
4328
178eeac3
JB		 4329 ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket,
4330 OCFS2_JOURNAL_ACCESS_CREATE);
01225596
TM		 4331 if (ret) {
4332 mlog_errno(ret);
85db90e7 4333 goto out;
01225596
TM		 4334 }
4335
178eeac3
JB		 4336 ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket);
4337 ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
01225596 4338
178eeac3 4339 ocfs2_xattr_update_xattr_search(inode, xs, xb_bh);
01225596
TM		 4340
4341 /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */
4342 memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize -
4343 offsetof(struct ocfs2_xattr_block, xb_attrs));
4344
4345 xr = &xb->xb_attrs.xb_root;
4346 xr->xt_clusters = cpu_to_le32(1);
4347 xr->xt_last_eb_blk = 0;
4348 xr->xt_list.l_tree_depth = 0;
4349 xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb));
4350 xr->xt_list.l_next_free_rec = cpu_to_le16(1);
4351
4352 xr->xt_list.l_recs[0].e_cpos = 0;
4353 xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno);
4354 xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1);
4355
4356 xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED);
4357
85db90e7 4358 ocfs2_journal_dirty(handle, xb_bh);
01225596 4359
85db90e7 4360out:
01225596
TM		 4361 up_write(&oi->ip_alloc_sem);
4362
01225596
TM		 4363 return ret;
4364}
4365
4366static int cmp_xe_offset(const void *a, const void *b)
4367{
4368 const struct ocfs2_xattr_entry *l = a, *r = b;
4369 u32 l_name_offset = le16_to_cpu(l->xe_name_offset);
4370 u32 r_name_offset = le16_to_cpu(r->xe_name_offset);
4371
4372 if (l_name_offset < r_name_offset)
4373 return 1;
4374 if (l_name_offset > r_name_offset)
4375 return -1;
4376 return 0;
4377}
4378
4379/*
4380 * defrag a xattr bucket if we find that the bucket has some
4381 * holes beteen name/value pairs.
4382 * We will move all the name/value pairs to the end of the bucket
4383 * so that we can spare some space for insertion.
4384 */
4385static int ocfs2_defrag_xattr_bucket(struct inode *inode,
85db90e7 4386 handle_t *handle,
01225596
TM		 4387 struct ocfs2_xattr_bucket *bucket)
4388{
4389 int ret, i;
199799a3 4390 size_t end, offset, len;
01225596
TM		 4391 struct ocfs2_xattr_header *xh;
4392 char *entries, *buf, *bucket_buf = NULL;
9c7759aa 4393 u64 blkno = bucket_blkno(bucket);
01225596 4394 u16 xh_free_start;
01225596 4395 size_t blocksize = inode->i_sb->s_blocksize;
01225596 4396 struct ocfs2_xattr_entry *xe;
01225596
TM		 4397
4398 /*
4399 * In order to make the operation more efficient and generic,
4400 * we copy all the blocks into a contiguous memory and do the
4401 * defragment there, so if anything is error, we will not touch
4402 * the real block.
4403 */
4404 bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS);
4405 if (!bucket_buf) {
4406 ret = -EIO;
4407 goto out;
4408 }
4409
4410 buf = bucket_buf;
1c32a2fd
TM		 4411 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
4412 memcpy(buf, bucket_block(bucket, i), blocksize);
01225596 4413
1c32a2fd 4414 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
161d6f30
JB		 4415 OCFS2_JOURNAL_ACCESS_WRITE);
4416 if (ret < 0) {
4417 mlog_errno(ret);
85db90e7 4418 goto out;
01225596
TM		 4419 }
4420
4421 xh = (struct ocfs2_xattr_header *)bucket_buf;
4422 entries = (char *)xh->xh_entries;
4423 xh_free_start = le16_to_cpu(xh->xh_free_start);
4424
402b4183 4425 trace_ocfs2_defrag_xattr_bucket(
de29c085
MF		 4426 (unsigned long long)blkno, le16_to_cpu(xh->xh_count),
4427 xh_free_start, le16_to_cpu(xh->xh_name_value_len));
01225596
TM		 4428
4429 /*
4430 * sort all the entries by their offset.
4431 * the largest will be the first, so that we can
4432 * move them to the end one by one.
4433 */
4434 sort(entries, le16_to_cpu(xh->xh_count),
4435 sizeof(struct ocfs2_xattr_entry),
4436 cmp_xe_offset, swap_xe);
4437
4438 /* Move all name/values to the end of the bucket. */
4439 xe = xh->xh_entries;
4440 end = OCFS2_XATTR_BUCKET_SIZE;
4441 for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) {
4442 offset = le16_to_cpu(xe->xe_name_offset);
199799a3 4443 len = namevalue_size_xe(xe);
01225596
TM		 4444
4445 /*
4446 * We must make sure that the name/value pair
4447 * exist in the same block. So adjust end to
4448 * the previous block end if needed.
4449 */
4450 if (((end - len) / blocksize !=
4451 (end - 1) / blocksize))
4452 end = end - end % blocksize;
4453
4454 if (end > offset + len) {
4455 memmove(bucket_buf + end - len,
4456 bucket_buf + offset, len);
4457 xe->xe_name_offset = cpu_to_le16(end - len);
4458 }
4459
4460 mlog_bug_on_msg(end < offset + len, "Defrag check failed for "
4461 "bucket %llu\n", (unsigned long long)blkno);
4462
4463 end -= len;
4464 }
4465
4466 mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for "
4467 "bucket %llu\n", (unsigned long long)blkno);
4468
4469 if (xh_free_start == end)
85db90e7 4470 goto out;
01225596
TM		 4471
4472 memset(bucket_buf + xh_free_start, 0, end - xh_free_start);
4473 xh->xh_free_start = cpu_to_le16(end);
4474
4475 /* sort the entries by their name_hash. */
4476 sort(entries, le16_to_cpu(xh->xh_count),
4477 sizeof(struct ocfs2_xattr_entry),
4478 cmp_xe, swap_xe);
4479
4480 buf = bucket_buf;
1c32a2fd
TM		 4481 for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize)
4482 memcpy(bucket_block(bucket, i), buf, blocksize);
4483 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
01225596 4484
01225596 4485out:
01225596
TM		 4486 kfree(bucket_buf);
4487 return ret;
4488}
4489
4490/*
b5c03e74
JB		 4491 * prev_blkno points to the start of an existing extent. new_blkno
4492 * points to a newly allocated extent. Because we know each of our
4493 * clusters contains more than bucket, we can easily split one cluster
4494 * at a bucket boundary. So we take the last cluster of the existing
4495 * extent and split it down the middle. We move the last half of the
4496 * buckets in the last cluster of the existing extent over to the new
4497 * extent.
01225596 4498 *
b5c03e74
JB		 4499 * first_bh is the buffer at prev_blkno so we can update the existing
4500 * extent's bucket count. header_bh is the bucket were we were hoping
4501 * to insert our xattr. If the bucket move places the target in the new
4502 * extent, we'll update first_bh and header_bh after modifying the old
4503 * extent.
4504 *
4505 * first_hash will be set as the 1st xe's name_hash in the new extent.
01225596
TM		 4506 */
4507static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode,
4508 handle_t *handle,
41cb8148
JB		 4509 struct ocfs2_xattr_bucket *first,
4510 struct ocfs2_xattr_bucket *target,
01225596 4511 u64 new_blkno,
01225596
TM		 4512 u32 num_clusters,
4513 u32 *first_hash)
4514{
c58b6032 4515 int ret;
41cb8148
JB		 4516 struct super_block *sb = inode->i_sb;
4517 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb);
4518 int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb));
b5c03e74 4519 int to_move = num_buckets / 2;
c58b6032 4520 u64 src_blkno;
41cb8148
JB		 4521 u64 last_cluster_blkno = bucket_blkno(first) +
4522 ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1));
01225596 4523
41cb8148
JB		 4524 BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets);
4525 BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize);
01225596 4526
402b4183
TM		 4527 trace_ocfs2_mv_xattr_bucket_cross_cluster(
4528 (unsigned long long)last_cluster_blkno,
4529 (unsigned long long)new_blkno);
01225596 4530
41cb8148 4531 ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first),
c58b6032
JB		 4532 last_cluster_blkno, new_blkno,
4533 to_move, first_hash);
01225596
TM		 4534 if (ret) {
4535 mlog_errno(ret);
4536 goto out;
4537 }
4538
c58b6032
JB		 4539 /* This is the first bucket that got moved */
4540 src_blkno = last_cluster_blkno + (to_move * blks_per_bucket);
01225596 4541
b5c03e74 4542 /*
c58b6032 4543 * If the target bucket was part of the moved buckets, we need to
41cb8148 4544 * update first and target.
b5c03e74 4545 */
41cb8148 4546 if (bucket_blkno(target) >= src_blkno) {
b5c03e74
JB		 4547 /* Find the block for the new target bucket */
4548 src_blkno = new_blkno +
41cb8148
JB		 4549 (bucket_blkno(target) - src_blkno);
4550
4551 ocfs2_xattr_bucket_relse(first);
4552 ocfs2_xattr_bucket_relse(target);
01225596 4553
b5c03e74 4554 /*
c58b6032 4555 * These shouldn't fail - the buffers are in the
b5c03e74
JB		 4556 * journal from ocfs2_cp_xattr_bucket().
4557 */
41cb8148 4558 ret = ocfs2_read_xattr_bucket(first, new_blkno);
c58b6032
JB		 4559 if (ret) {
4560 mlog_errno(ret);
4561 goto out;
4562 }
41cb8148
JB		 4563 ret = ocfs2_read_xattr_bucket(target, src_blkno);
4564 if (ret)
b5c03e74 4565 mlog_errno(ret);
01225596 4566
01225596
TM		 4567 }
4568
01225596 4569out:
01225596
TM		 4570 return ret;
4571}
4572
01225596 4573/*
80bcaf34
TM		 4574 * Find the suitable pos when we divide a bucket into 2.
4575 * We have to make sure the xattrs with the same hash value exist
4576 * in the same bucket.
4577 *
4578 * If this ocfs2_xattr_header covers more than one hash value, find a
4579 * place where the hash value changes. Try to find the most even split.
4580 * The most common case is that all entries have different hash values,
4581 * and the first check we make will find a place to split.
4582 */
4583static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh)
4584{
4585 struct ocfs2_xattr_entry *entries = xh->xh_entries;
4586 int count = le16_to_cpu(xh->xh_count);
4587 int delta, middle = count / 2;
4588
4589 /*
4590 * We start at the middle. Each step gets farther away in both
4591 * directions. We therefore hit the change in hash value
4592 * nearest to the middle. Note that this loop does not execute for
4593 * count < 2.
4594 */
4595 for (delta = 0; delta < middle; delta++) {
4596 /* Let's check delta earlier than middle */
4597 if (cmp_xe(&entries[middle - delta - 1],
4598 &entries[middle - delta]))
4599 return middle - delta;
4600
4601 /* For even counts, don't walk off the end */
4602 if ((middle + delta + 1) == count)
4603 continue;
4604
4605 /* Now try delta past middle */
4606 if (cmp_xe(&entries[middle + delta],
4607 &entries[middle + delta + 1]))
4608 return middle + delta + 1;
4609 }
4610
4611 /* Every entry had the same hash */
4612 return count;
4613}
4614
4615/*
4616 * Move some xattrs in old bucket(blk) to new bucket(new_blk).
01225596 4617 * first_hash will record the 1st hash of the new bucket.
80bcaf34
TM		 4618 *
4619 * Normally half of the xattrs will be moved. But we have to make
4620 * sure that the xattrs with the same hash value are stored in the
4621 * same bucket. If all the xattrs in this bucket have the same hash
4622 * value, the new bucket will be initialized as an empty one and the
4623 * first_hash will be initialized as (hash_value+1).
01225596 4624 */
80bcaf34
TM		 4625static int ocfs2_divide_xattr_bucket(struct inode *inode,
4626 handle_t *handle,
4627 u64 blk,
4628 u64 new_blk,
4629 u32 *first_hash,
4630 int new_bucket_head)
01225596
TM		 4631{
4632 int ret, i;
199799a3 4633 int count, start, len, name_value_len = 0, name_offset = 0;
ba937127 4634 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 4635 struct ocfs2_xattr_header *xh;
4636 struct ocfs2_xattr_entry *xe;
4637 int blocksize = inode->i_sb->s_blocksize;
4638
402b4183
TM		 4639 trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk,
4640 (unsigned long long)new_blk);
01225596 4641
ba937127
JB		 4642 s_bucket = ocfs2_xattr_bucket_new(inode);
4643 t_bucket = ocfs2_xattr_bucket_new(inode);
4644 if (!s_bucket || !t_bucket) {
4645 ret = -ENOMEM;
4646 mlog_errno(ret);
4647 goto out;
4648 }
01225596 4649
ba937127 4650 ret = ocfs2_read_xattr_bucket(s_bucket, blk);
01225596
TM		 4651 if (ret) {
4652 mlog_errno(ret);
4653 goto out;
4654 }
4655
ba937127 4656 ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket,
1224be02 4657 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4658 if (ret) {
4659 mlog_errno(ret);
4660 goto out;
4661 }
4662
784b816a
JB		 4663 /*
4664 * Even if !new_bucket_head, we're overwriting t_bucket. Thus,
4665 * there's no need to read it.
4666 */
9c339255 4667 ret = ocfs2_init_xattr_bucket(t_bucket, new_blk, new_bucket_head);
01225596
TM		 4668 if (ret) {
4669 mlog_errno(ret);
4670 goto out;
4671 }
4672
2b656c1d
JB		 4673 /*
4674 * Hey, if we're overwriting t_bucket, what difference does
4675 * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the
4676 * same part of ocfs2_cp_xattr_bucket().
4677 */
ba937127 4678 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 4679 new_bucket_head ?
4680 OCFS2_JOURNAL_ACCESS_CREATE :
4681 OCFS2_JOURNAL_ACCESS_WRITE);
4682 if (ret) {
4683 mlog_errno(ret);
4684 goto out;
01225596
TM		 4685 }
4686
ba937127 4687 xh = bucket_xh(s_bucket);
80bcaf34
TM		 4688 count = le16_to_cpu(xh->xh_count);
4689 start = ocfs2_xattr_find_divide_pos(xh);
4690
4691 if (start == count) {
4692 xe = &xh->xh_entries[start-1];
4693
4694 /*
4695 * initialized a new empty bucket here.
4696 * The hash value is set as one larger than
4697 * that of the last entry in the previous bucket.
4698 */
ba937127
JB		 4699 for (i = 0; i < t_bucket->bu_blocks; i++)
4700 memset(bucket_block(t_bucket, i), 0, blocksize);
80bcaf34 4701
ba937127 4702 xh = bucket_xh(t_bucket);
80bcaf34
TM		 4703 xh->xh_free_start = cpu_to_le16(blocksize);
4704 xh->xh_entries[0].xe_name_hash = xe->xe_name_hash;
4705 le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1);
4706
4707 goto set_num_buckets;
4708 }
4709
01225596 4710 /* copy the whole bucket to the new first. */
ba937127 4711 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
01225596
TM		 4712
4713 /* update the new bucket. */
ba937127 4714 xh = bucket_xh(t_bucket);
01225596
TM		 4715
4716 /*
4717 * Calculate the total name/value len and xh_free_start for
4718 * the old bucket first.
4719 */
4720 name_offset = OCFS2_XATTR_BUCKET_SIZE;
4721 name_value_len = 0;
4722 for (i = 0; i < start; i++) {
4723 xe = &xh->xh_entries[i];
199799a3 4724 name_value_len += namevalue_size_xe(xe);
01225596
TM		 4725 if (le16_to_cpu(xe->xe_name_offset) < name_offset)
4726 name_offset = le16_to_cpu(xe->xe_name_offset);
4727 }
4728
4729 /*
4730 * Now begin the modification to the new bucket.
4731 *
4732 * In the new bucket, We just move the xattr entry to the beginning
4733 * and don't touch the name/value. So there will be some holes in the
4734 * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is
4735 * called.
4736 */
4737 xe = &xh->xh_entries[start];
4738 len = sizeof(struct ocfs2_xattr_entry) * (count - start);
402b4183
TM		 4739 trace_ocfs2_divide_xattr_bucket_move(len,
4740 (int)((char *)xe - (char *)xh),
4741 (int)((char *)xh->xh_entries - (char *)xh));
01225596
TM		 4742 memmove((char *)xh->xh_entries, (char *)xe, len);
4743 xe = &xh->xh_entries[count - start];
4744 len = sizeof(struct ocfs2_xattr_entry) * start;
4745 memset((char *)xe, 0, len);
4746
4747 le16_add_cpu(&xh->xh_count, -start);
4748 le16_add_cpu(&xh->xh_name_value_len, -name_value_len);
4749
4750 /* Calculate xh_free_start for the new bucket. */
4751 xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
4752 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
4753 xe = &xh->xh_entries[i];
01225596
TM		 4754 if (le16_to_cpu(xe->xe_name_offset) <
4755 le16_to_cpu(xh->xh_free_start))
4756 xh->xh_free_start = xe->xe_name_offset;
4757 }
4758
80bcaf34 4759set_num_buckets:
01225596
TM		 4760 /* set xh->xh_num_buckets for the new xh. */
4761 if (new_bucket_head)
4762 xh->xh_num_buckets = cpu_to_le16(1);
4763 else
4764 xh->xh_num_buckets = 0;
4765
ba937127 4766 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 4767
4768 /* store the first_hash of the new bucket. */
4769 if (first_hash)
4770 *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash);
4771
4772 /*
80bcaf34
TM		 4773 * Now only update the 1st block of the old bucket. If we
4774 * just added a new empty bucket, there is no need to modify
4775 * it.
01225596 4776 */
80bcaf34
TM		 4777 if (start == count)
4778 goto out;
4779
ba937127 4780 xh = bucket_xh(s_bucket);
01225596
TM		 4781 memset(&xh->xh_entries[start], 0,
4782 sizeof(struct ocfs2_xattr_entry) * (count - start));
4783 xh->xh_count = cpu_to_le16(start);
4784 xh->xh_free_start = cpu_to_le16(name_offset);
4785 xh->xh_name_value_len = cpu_to_le16(name_value_len);
4786
ba937127 4787 ocfs2_xattr_bucket_journal_dirty(handle, s_bucket);
01225596
TM		 4788
4789out:
ba937127
JB		 4790 ocfs2_xattr_bucket_free(s_bucket);
4791 ocfs2_xattr_bucket_free(t_bucket);
01225596
TM		 4792
4793 return ret;
4794}
4795
4796/*
4797 * Copy xattr from one bucket to another bucket.
4798 *
4799 * The caller must make sure that the journal transaction
4800 * has enough space for journaling.
4801 */
4802static int ocfs2_cp_xattr_bucket(struct inode *inode,
4803 handle_t *handle,
4804 u64 s_blkno,
4805 u64 t_blkno,
4806 int t_is_new)
4807{
4980c6da 4808 int ret;
ba937127 4809 struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL;
01225596
TM		 4810
4811 BUG_ON(s_blkno == t_blkno);
4812
402b4183
TM		 4813 trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno,
4814 (unsigned long long)t_blkno,
4815 t_is_new);
01225596 4816
ba937127
JB		 4817 s_bucket = ocfs2_xattr_bucket_new(inode);
4818 t_bucket = ocfs2_xattr_bucket_new(inode);
4819 if (!s_bucket || !t_bucket) {
4820 ret = -ENOMEM;
4821 mlog_errno(ret);
4822 goto out;
4823 }
92de109a 4824
ba937127 4825 ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno);
01225596
TM		 4826 if (ret)
4827 goto out;
4828
784b816a
JB		 4829 /*
4830 * Even if !t_is_new, we're overwriting t_bucket. Thus,
4831 * there's no need to read it.
4832 */
9c339255 4833 ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno, t_is_new);
01225596
TM		 4834 if (ret)
4835 goto out;
4836
2b656c1d
JB		 4837 /*
4838 * Hey, if we're overwriting t_bucket, what difference does
4839 * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
874d65af
JB		 4840 * cluster to fill, we came here from
4841 * ocfs2_mv_xattr_buckets(), and it is really new -
4842 * ACCESS_CREATE is required. But we also might have moved data
4843 * out of t_bucket before extending back into it.
4844 * ocfs2_add_new_xattr_bucket() can do this - its call to
4845 * ocfs2_add_new_xattr_cluster() may have created a new extent
2b656c1d
JB		 4846 * and copied out the end of the old extent. Then it re-extends
4847 * the old extent back to create space for new xattrs. That's
4848 * how we get here, and the bucket isn't really new.
4849 */
ba937127 4850 ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket,
1224be02
JB		 4851 t_is_new ?
4852 OCFS2_JOURNAL_ACCESS_CREATE :
4853 OCFS2_JOURNAL_ACCESS_WRITE);
4854 if (ret)
4855 goto out;
01225596 4856
ba937127
JB		 4857 ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket);
4858 ocfs2_xattr_bucket_journal_dirty(handle, t_bucket);
01225596
TM		 4859
4860out:
ba937127
JB		 4861 ocfs2_xattr_bucket_free(t_bucket);
4862 ocfs2_xattr_bucket_free(s_bucket);
01225596
TM		 4863
4864 return ret;
4865}
4866
4867/*
874d65af
JB		 4868 * src_blk points to the start of an existing extent. last_blk points to
4869 * last cluster in that extent. to_blk points to a newly allocated
54ecb6b6
JB		 4870 * extent. We copy the buckets from the cluster at last_blk to the new
4871 * extent. If start_bucket is non-zero, we skip that many buckets before
4872 * we start copying. The new extent's xh_num_buckets gets set to the
4873 * number of buckets we copied. The old extent's xh_num_buckets shrinks
4874 * by the same amount.
01225596 4875 */
54ecb6b6
JB		 4876static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle,
4877 u64 src_blk, u64 last_blk, u64 to_blk,
4878 unsigned int start_bucket,
4879 u32 *first_hash)
01225596
TM		 4880{
4881 int i, ret, credits;
4882 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
15d60929 4883 int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
01225596 4884 int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
15d60929 4885 struct ocfs2_xattr_bucket *old_first, *new_first;
01225596 4886
402b4183
TM		 4887 trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk,
4888 (unsigned long long)to_blk);
01225596 4889
54ecb6b6
JB		 4890 BUG_ON(start_bucket >= num_buckets);
4891 if (start_bucket) {
4892 num_buckets -= start_bucket;
4893 last_blk += (start_bucket * blks_per_bucket);
4894 }
4895
15d60929
JB		 4896 /* The first bucket of the original extent */
4897 old_first = ocfs2_xattr_bucket_new(inode);
4898 /* The first bucket of the new extent */
4899 new_first = ocfs2_xattr_bucket_new(inode);
4900 if (!old_first || !new_first) {
4901 ret = -ENOMEM;
4902 mlog_errno(ret);
4903 goto out;
4904 }
4905
874d65af 4906 ret = ocfs2_read_xattr_bucket(old_first, src_blk);
15d60929
JB		 4907 if (ret) {
4908 mlog_errno(ret);
4909 goto out;
4910 }
4911
01225596 4912 /*
54ecb6b6
JB		 4913 * We need to update the first bucket of the old extent and all
4914 * the buckets going to the new extent.
01225596 4915 */
c901fb00 4916 credits = ((num_buckets + 1) * blks_per_bucket);
01225596
TM		 4917 ret = ocfs2_extend_trans(handle, credits);
4918 if (ret) {
4919 mlog_errno(ret);
4920 goto out;
4921 }
4922
15d60929
JB		 4923 ret = ocfs2_xattr_bucket_journal_access(handle, old_first,
4924 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4925 if (ret) {
4926 mlog_errno(ret);
4927 goto out;
4928 }
4929
4930 for (i = 0; i < num_buckets; i++) {
4931 ret = ocfs2_cp_xattr_bucket(inode, handle,
874d65af 4932 last_blk + (i * blks_per_bucket),
15d60929
JB		 4933 to_blk + (i * blks_per_bucket),
4934 1);
01225596
TM		 4935 if (ret) {
4936 mlog_errno(ret);
4937 goto out;
4938 }
01225596
TM		 4939 }
4940
15d60929
JB		 4941 /*
4942 * Get the new bucket ready before we dirty anything
4943 * (This actually shouldn't fail, because we already dirtied
4944 * it once in ocfs2_cp_xattr_bucket()).
4945 */
4946 ret = ocfs2_read_xattr_bucket(new_first, to_blk);
4947 if (ret) {
01225596
TM		 4948 mlog_errno(ret);
4949 goto out;
4950 }
15d60929
JB		 4951 ret = ocfs2_xattr_bucket_journal_access(handle, new_first,
4952 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 4953 if (ret) {
4954 mlog_errno(ret);
4955 goto out;
4956 }
4957
15d60929
JB		 4958 /* Now update the headers */
4959 le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets);
4960 ocfs2_xattr_bucket_journal_dirty(handle, old_first);
01225596 4961
15d60929
JB		 4962 bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets);
4963 ocfs2_xattr_bucket_journal_dirty(handle, new_first);
01225596
TM		 4964
4965 if (first_hash)
15d60929
JB		 4966 *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash);
4967
01225596 4968out:
15d60929
JB		 4969 ocfs2_xattr_bucket_free(new_first);
4970 ocfs2_xattr_bucket_free(old_first);
01225596
TM		 4971 return ret;
4972}
4973
4974/*
80bcaf34 4975 * Move some xattrs in this cluster to the new cluster.
01225596
TM		 4976 * This function should only be called when bucket size == cluster size.
4977 * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead.
4978 */
80bcaf34
TM		 4979static int ocfs2_divide_xattr_cluster(struct inode *inode,
4980 handle_t *handle,
4981 u64 prev_blk,
4982 u64 new_blk,
4983 u32 *first_hash)
01225596
TM		 4984{
4985 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
c901fb00 4986 int ret, credits = 2 * blk_per_bucket;
01225596
TM		 4987
4988 BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize);
4989
4990 ret = ocfs2_extend_trans(handle, credits);
4991 if (ret) {
4992 mlog_errno(ret);
4993 return ret;
4994 }
4995
4996 /* Move half of the xattr in start_blk to the next bucket. */
80bcaf34
TM		 4997 return ocfs2_divide_xattr_bucket(inode, handle, prev_blk,
4998 new_blk, first_hash, 1);
01225596
TM		 4999}
5000
5001/*
5002 * Move some xattrs from the old cluster to the new one since they are not
5003 * contiguous in ocfs2 xattr tree.
5004 *
5005 * new_blk starts a new separate cluster, and we will move some xattrs from
5006 * prev_blk to it. v_start will be set as the first name hash value in this
5007 * new cluster so that it can be used as e_cpos during tree insertion and
5008 * don't collide with our original b-tree operations. first_bh and header_bh
5009 * will also be updated since they will be used in ocfs2_extend_xattr_bucket
5010 * to extend the insert bucket.
5011 *
5012 * The problem is how much xattr should we move to the new one and when should
5013 * we update first_bh and header_bh?
5014 * 1. If cluster size > bucket size, that means the previous cluster has more
5015 * than 1 bucket, so just move half nums of bucket into the new cluster and
5016 * update the first_bh and header_bh if the insert bucket has been moved
5017 * to the new cluster.
5018 * 2. If cluster_size == bucket_size:
5019 * a) If the previous extent rec has more than one cluster and the insert
5020 * place isn't in the last cluster, copy the entire last cluster to the
5021 * new one. This time, we don't need to upate the first_bh and header_bh
5022 * since they will not be moved into the new cluster.
5023 * b) Otherwise, move the bottom half of the xattrs in the last cluster into
5024 * the new one. And we set the extend flag to zero if the insert place is
5025 * moved into the new allocated cluster since no extend is needed.
5026 */
5027static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
5028 handle_t *handle,
012ee910
JB		 5029 struct ocfs2_xattr_bucket *first,
5030 struct ocfs2_xattr_bucket *target,
01225596 5031 u64 new_blk,
01225596
TM		 5032 u32 prev_clusters,
5033 u32 *v_start,
5034 int *extend)
5035{
92cf3adf 5036 int ret;
01225596 5037
402b4183
TM		 5038 trace_ocfs2_adjust_xattr_cross_cluster(
5039 (unsigned long long)bucket_blkno(first),
5040 (unsigned long long)new_blk, prev_clusters);
01225596 5041
41cb8148 5042 if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) {
01225596
TM		 5043 ret = ocfs2_mv_xattr_bucket_cross_cluster(inode,
5044 handle,
41cb8148 5045 first, target,
01225596 5046 new_blk,
01225596
TM		 5047 prev_clusters,
5048 v_start);
012ee910 5049 if (ret)
41cb8148 5050 mlog_errno(ret);
41cb8148 5051 } else {
92cf3adf
JB		 5052 /* The start of the last cluster in the first extent */
5053 u64 last_blk = bucket_blkno(first) +
5054 ((prev_clusters - 1) *
5055 ocfs2_clusters_to_blocks(inode->i_sb, 1));
01225596 5056
012ee910 5057 if (prev_clusters > 1 && bucket_blkno(target) != last_blk) {
874d65af 5058 ret = ocfs2_mv_xattr_buckets(inode, handle,
92cf3adf 5059 bucket_blkno(first),
54ecb6b6 5060 last_blk, new_blk, 0,
01225596 5061 v_start);
012ee910
JB		 5062 if (ret)
5063 mlog_errno(ret);
5064 } else {
80bcaf34
TM		 5065 ret = ocfs2_divide_xattr_cluster(inode, handle,
5066 last_blk, new_blk,
5067 v_start);
012ee910
JB		 5068 if (ret)
5069 mlog_errno(ret);
01225596 5070
92cf3adf 5071 if ((bucket_blkno(target) == last_blk) && extend)
01225596
TM		 5072 *extend = 0;
5073 }
5074 }
5075
5076 return ret;
5077}
5078
5079/*
5080 * Add a new cluster for xattr storage.
5081 *
5082 * If the new cluster is contiguous with the previous one, it will be
5083 * appended to the same extent record, and num_clusters will be updated.
5084 * If not, we will insert a new extent for it and move some xattrs in
5085 * the last cluster into the new allocated one.
5086 * We also need to limit the maximum size of a btree leaf, otherwise we'll
5087 * lose the benefits of hashing because we'll have to search large leaves.
5088 * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize,
5089 * if it's bigger).
5090 *
5091 * first_bh is the first block of the previous extent rec and header_bh
5092 * indicates the bucket we will insert the new xattrs. They will be updated
5093 * when the header_bh is moved into the new cluster.
5094 */
5095static int ocfs2_add_new_xattr_cluster(struct inode *inode,
5096 struct buffer_head *root_bh,
ed29c0ca
JB		 5097 struct ocfs2_xattr_bucket *first,
5098 struct ocfs2_xattr_bucket *target,
01225596
TM		 5099 u32 *num_clusters,
5100 u32 prev_cpos,
78f30c31
TM		 5101 int *extend,
5102 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 5103{
85db90e7 5104 int ret;
01225596
TM		 5105 u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
5106 u32 prev_clusters = *num_clusters;
5107 u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0;
5108 u64 block;
85db90e7 5109 handle_t *handle = ctxt->handle;
01225596 5110 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
f99b9b7c 5111 struct ocfs2_extent_tree et;
01225596 5112
402b4183
TM		 5113 trace_ocfs2_add_new_xattr_cluster_begin(
5114 (unsigned long long)OCFS2_I(inode)->ip_blkno,
5115 (unsigned long long)bucket_blkno(first),
5116 prev_cpos, prev_clusters);
01225596 5117
5e404e9e 5118 ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh);
f99b9b7c 5119
0cf2f763 5120 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
84008972 5121 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 5122 if (ret < 0) {
5123 mlog_errno(ret);
5124 goto leave;
5125 }
5126
1ed9b777 5127 ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1,
01225596
TM		 5128 clusters_to_add, &bit_off, &num_bits);
5129 if (ret < 0) {
5130 if (ret != -ENOSPC)
5131 mlog_errno(ret);
5132 goto leave;
5133 }
5134
5135 BUG_ON(num_bits > clusters_to_add);
5136
5137 block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
402b4183 5138 trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits);
01225596 5139
ed29c0ca 5140 if (bucket_blkno(first) + (prev_clusters * bpc) == block &&
01225596
TM		 5141 (prev_clusters + num_bits) << osb->s_clustersize_bits <=
5142 OCFS2_MAX_XATTR_TREE_LEAF_SIZE) {
5143 /*
5144 * If this cluster is contiguous with the old one and
5145 * adding this new cluster, we don't surpass the limit of
5146 * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be
5147 * initialized and used like other buckets in the previous
5148 * cluster.
5149 * So add it as a contiguous one. The caller will handle
5150 * its init process.
5151 */
5152 v_start = prev_cpos + prev_clusters;
5153 *num_clusters = prev_clusters + num_bits;
01225596
TM		 5154 } else {
5155 ret = ocfs2_adjust_xattr_cross_cluster(inode,
5156 handle,
012ee910
JB		 5157 first,
5158 target,
01225596 5159 block,
01225596
TM		 5160 prev_clusters,
5161 &v_start,
5162 extend);
5163 if (ret) {
5164 mlog_errno(ret);
5165 goto leave;
5166 }
5167 }
5168
402b4183
TM		 5169 trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block,
5170 v_start, num_bits);
cc79d8c1 5171 ret = ocfs2_insert_extent(handle, &et, v_start, block,
78f30c31 5172 num_bits, 0, ctxt->meta_ac);
01225596
TM		 5173 if (ret < 0) {
5174 mlog_errno(ret);
5175 goto leave;
5176 }
5177
ec20cec7 5178 ocfs2_journal_dirty(handle, root_bh);
01225596
TM		 5179
5180leave:
01225596
TM		 5181 return ret;
5182}
5183
5184/*
92de109a
JB		 5185 * We are given an extent. 'first' is the bucket at the very front of
5186 * the extent. The extent has space for an additional bucket past
5187 * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number
5188 * of the target bucket. We wish to shift every bucket past the target
5189 * down one, filling in that additional space. When we get back to the
5190 * target, we split the target between itself and the now-empty bucket
5191 * at target+1 (aka, target_blkno + blks_per_bucket).
01225596
TM		 5192 */
5193static int ocfs2_extend_xattr_bucket(struct inode *inode,
85db90e7 5194 handle_t *handle,
92de109a
JB		 5195 struct ocfs2_xattr_bucket *first,
5196 u64 target_blk,
01225596
TM		 5197 u32 num_clusters)
5198{
5199 int ret, credits;
5200 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5201 u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb);
92de109a
JB		 5202 u64 end_blk;
5203 u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets);
01225596 5204
402b4183
TM		 5205 trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk,
5206 (unsigned long long)bucket_blkno(first),
5207 num_clusters, new_bucket);
01225596 5208
92de109a
JB		 5209 /* The extent must have room for an additional bucket */
5210 BUG_ON(new_bucket >=
5211 (num_clusters * ocfs2_xattr_buckets_per_cluster(osb)));
01225596 5212
92de109a
JB		 5213 /* end_blk points to the last existing bucket */
5214 end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket);
01225596
TM		 5215
5216 /*
92de109a
JB		 5217 * end_blk is the start of the last existing bucket.
5218 * Thus, (end_blk - target_blk) covers the target bucket and
5219 * every bucket after it up to, but not including, the last
5220 * existing bucket. Then we add the last existing bucket, the
5221 * new bucket, and the first bucket (3 * blk_per_bucket).
01225596 5222 */
c901fb00 5223 credits = (end_blk - target_blk) + (3 * blk_per_bucket);
85db90e7
TM		 5224 ret = ocfs2_extend_trans(handle, credits);
5225 if (ret) {
01225596
TM		 5226 mlog_errno(ret);
5227 goto out;
5228 }
5229
92de109a
JB		 5230 ret = ocfs2_xattr_bucket_journal_access(handle, first,
5231 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 5232 if (ret) {
5233 mlog_errno(ret);
85db90e7 5234 goto out;
01225596
TM		 5235 }
5236
92de109a 5237 while (end_blk != target_blk) {
01225596
TM		 5238 ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk,
5239 end_blk + blk_per_bucket, 0);
5240 if (ret)
85db90e7 5241 goto out;
01225596
TM		 5242 end_blk -= blk_per_bucket;
5243 }
5244
92de109a
JB		 5245 /* Move half of the xattr in target_blkno to the next bucket. */
5246 ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk,
5247 target_blk + blk_per_bucket, NULL, 0);
01225596 5248
92de109a
JB		 5249 le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1);
5250 ocfs2_xattr_bucket_journal_dirty(handle, first);
01225596 5251
01225596
TM		 5252out:
5253 return ret;
5254}
5255
5256/*
91f2033f
JB		 5257 * Add new xattr bucket in an extent record and adjust the buckets
5258 * accordingly. xb_bh is the ocfs2_xattr_block, and target is the
5259 * bucket we want to insert into.
01225596 5260 *
91f2033f
JB		 5261 * In the easy case, we will move all the buckets after target down by
5262 * one. Half of target's xattrs will be moved to the next bucket.
5263 *
5264 * If current cluster is full, we'll allocate a new one. This may not
5265 * be contiguous. The underlying calls will make sure that there is
5266 * space for the insert, shifting buckets around if necessary.
5267 * 'target' may be moved by those calls.
01225596
TM		 5268 */
5269static int ocfs2_add_new_xattr_bucket(struct inode *inode,
5270 struct buffer_head *xb_bh,
91f2033f 5271 struct ocfs2_xattr_bucket *target,
78f30c31 5272 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 5273{
01225596
TM		 5274 struct ocfs2_xattr_block *xb =
5275 (struct ocfs2_xattr_block *)xb_bh->b_data;
5276 struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root;
5277 struct ocfs2_extent_list *el = &xb_root->xt_list;
91f2033f
JB		 5278 u32 name_hash =
5279 le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash);
ed29c0ca 5280 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
01225596
TM		 5281 int ret, num_buckets, extend = 1;
5282 u64 p_blkno;
5283 u32 e_cpos, num_clusters;
92de109a 5284 /* The bucket at the front of the extent */
91f2033f 5285 struct ocfs2_xattr_bucket *first;
01225596 5286
402b4183
TM		 5287 trace_ocfs2_add_new_xattr_bucket(
5288 (unsigned long long)bucket_blkno(target));
01225596 5289
ed29c0ca 5290 /* The first bucket of the original extent */
92de109a 5291 first = ocfs2_xattr_bucket_new(inode);
91f2033f 5292 if (!first) {
92de109a
JB		 5293 ret = -ENOMEM;
5294 mlog_errno(ret);
5295 goto out;
5296 }
5297
01225596
TM		 5298 ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos,
5299 &num_clusters, el);
5300 if (ret) {
5301 mlog_errno(ret);
5302 goto out;
5303 }
5304
ed29c0ca 5305 ret = ocfs2_read_xattr_bucket(first, p_blkno);
01225596
TM		 5306 if (ret) {
5307 mlog_errno(ret);
5308 goto out;
5309 }
5310
ed29c0ca
JB		 5311 num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters;
5312 if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) {
5313 /*
5314 * This can move first+target if the target bucket moves
5315 * to the new extent.
5316 */
01225596
TM		 5317 ret = ocfs2_add_new_xattr_cluster(inode,
5318 xb_bh,
ed29c0ca
JB		 5319 first,
5320 target,
01225596
TM		 5321 &num_clusters,
5322 e_cpos,
78f30c31
TM		 5323 &extend,
5324 ctxt);
01225596
TM		 5325 if (ret) {
5326 mlog_errno(ret);
5327 goto out;
5328 }
5329 }
5330
92de109a 5331 if (extend) {
01225596 5332 ret = ocfs2_extend_xattr_bucket(inode,
85db90e7 5333 ctxt->handle,
ed29c0ca
JB		 5334 first,
5335 bucket_blkno(target),
01225596 5336 num_clusters);
92de109a
JB		 5337 if (ret)
5338 mlog_errno(ret);
5339 }
5340
01225596 5341out:
92de109a 5342 ocfs2_xattr_bucket_free(first);
ed29c0ca 5343
01225596
TM		 5344 return ret;
5345}
5346
01225596
TM		 5347/*
5348 * Truncate the specified xe_off entry in xattr bucket.
5349 * bucket is indicated by header_bh and len is the new length.
5350 * Both the ocfs2_xattr_value_root and the entry will be updated here.
5351 *
5352 * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed.
5353 */
5354static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
548b0f22 5355 struct ocfs2_xattr_bucket *bucket,
01225596 5356 int xe_off,
78f30c31
TM		 5357 int len,
5358 struct ocfs2_xattr_set_ctxt *ctxt)
01225596
TM		 5359{
5360 int ret, offset;
5361 u64 value_blk;
01225596 5362 struct ocfs2_xattr_entry *xe;
548b0f22 5363 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
01225596 5364 size_t blocksize = inode->i_sb->s_blocksize;
b3e5d379
JB		 5365 struct ocfs2_xattr_value_buf vb = {
5366 .vb_access = ocfs2_journal_access,
5367 };
01225596
TM		 5368
5369 xe = &xh->xh_entries[xe_off];
5370
5371 BUG_ON(!xe || ocfs2_xattr_is_local(xe));
5372
5373 offset = le16_to_cpu(xe->xe_name_offset) +
5374 OCFS2_XATTR_SIZE(xe->xe_name_len);
5375
5376 value_blk = offset / blocksize;
5377
5378 /* We don't allow ocfs2_xattr_value to be stored in different block. */
5379 BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize);
01225596 5380
b3e5d379
JB		 5381 vb.vb_bh = bucket->bu_bhs[value_blk];
5382 BUG_ON(!vb.vb_bh);
01225596 5383
b3e5d379
JB		 5384 vb.vb_xv = (struct ocfs2_xattr_value_root *)
5385 (vb.vb_bh->b_data + offset % blocksize);
01225596 5386
548b0f22
JB		 5387 /*
5388 * From here on out we have to dirty the bucket. The generic
5389 * value calls only modify one of the bucket's bhs, but we need
5390 * to send the bucket at once. So if they error, they *could* have
5391 * modified something. We have to assume they did, and dirty
5392 * the whole bucket. This leaves us in a consistent state.
5393 */
402b4183
TM		 5394 trace_ocfs2_xattr_bucket_value_truncate(
5395 (unsigned long long)bucket_blkno(bucket), xe_off, len);
b3e5d379 5396 ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt);
01225596
TM		 5397 if (ret) {
5398 mlog_errno(ret);
554e7f9e
TM		 5399 goto out;
5400 }
5401
5402 ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket,
5403 OCFS2_JOURNAL_ACCESS_WRITE);
5404 if (ret) {
5405 mlog_errno(ret);
5406 goto out;
01225596
TM		 5407 }
5408
548b0f22
JB		 5409 xe->xe_value_size = cpu_to_le64(len);
5410
548b0f22
JB		 5411 ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket);
5412
01225596 5413out:
01225596
TM		 5414 return ret;
5415}
5416
01225596
TM		 5417static int ocfs2_rm_xattr_cluster(struct inode *inode,
5418 struct buffer_head *root_bh,
5419 u64 blkno,
5420 u32 cpos,
47bca495
TM		 5421 u32 len,
5422 void *para)
01225596
TM		 5423{
5424 int ret;
5425 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5426 struct inode *tl_inode = osb->osb_tl_inode;
5427 handle_t *handle;
5428 struct ocfs2_xattr_block *xb =
5429 (struct ocfs2_xattr_block *)root_bh->b_data;
01225596
TM		 5430 struct ocfs2_alloc_context *meta_ac = NULL;
5431 struct ocfs2_cached_dealloc_ctxt dealloc;
f99b9b7c
JB		 5432 struct ocfs2_extent_tree et;
5433
47bca495 5434 ret = ocfs2_iterate_xattr_buckets(inode, blkno, len,
ce9c5a54 5435 ocfs2_delete_xattr_in_bucket, para);
47bca495
TM		 5436 if (ret) {
5437 mlog_errno(ret);
5438 return ret;
5439 }
5440
5e404e9e 5441 ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh);
01225596
TM		 5442
5443 ocfs2_init_dealloc_ctxt(&dealloc);
5444
402b4183
TM		 5445 trace_ocfs2_rm_xattr_cluster(
5446 (unsigned long long)OCFS2_I(inode)->ip_blkno,
5447 (unsigned long long)blkno, cpos, len);
01225596 5448
8cb471e8
JB		 5449 ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno,
5450 len);
01225596 5451
f99b9b7c 5452 ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac);
01225596
TM		 5453 if (ret) {
5454 mlog_errno(ret);
5455 return ret;
5456 }
5457
5955102c 5458 inode_lock(tl_inode);
01225596
TM		 5459
5460 if (ocfs2_truncate_log_needs_flush(osb)) {
5461 ret = __ocfs2_flush_truncate_log(osb);
5462 if (ret < 0) {
5463 mlog_errno(ret);
5464 goto out;
5465 }
5466 }
5467
a90714c1 5468 handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb));
d3264799 5469 if (IS_ERR(handle)) {
01225596
TM		 5470 ret = -ENOMEM;
5471 mlog_errno(ret);
5472 goto out;
5473 }
5474
0cf2f763 5475 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh,
84008972 5476 OCFS2_JOURNAL_ACCESS_WRITE);
01225596
TM		 5477 if (ret) {
5478 mlog_errno(ret);
5479 goto out_commit;
5480 }
5481
dbdcf6a4 5482 ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac,
f99b9b7c 5483 &dealloc);
01225596
TM		 5484 if (ret) {
5485 mlog_errno(ret);
5486 goto out_commit;
5487 }
5488
5489 le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len);
ec20cec7 5490 ocfs2_journal_dirty(handle, root_bh);
01225596
TM		 5491
5492 ret = ocfs2_truncate_log_append(osb, handle, blkno, len);
5493 if (ret)
5494 mlog_errno(ret);
6fdb702d 5495 ocfs2_update_inode_fsync_trans(handle, inode, 0);
01225596
TM		 5496
5497out_commit:
5498 ocfs2_commit_trans(osb, handle);
5499out:
5500 ocfs2_schedule_truncate_log_flush(osb, 1);
5501
5955102c 5502 inode_unlock(tl_inode);
01225596
TM		 5503
5504 if (meta_ac)
5505 ocfs2_free_alloc_context(meta_ac);
5506
5507 ocfs2_run_deallocs(osb, &dealloc);
5508
5509 return ret;
5510}
5511
80bcaf34
TM		 5512/*
5513 * check whether the xattr bucket is filled up with the same hash value.
5514 * If we want to insert the xattr with the same hash, return -ENOSPC.
5515 * If we want to insert a xattr with different hash value, go ahead
5516 * and ocfs2_divide_xattr_bucket will handle this.
5517 */
01225596 5518static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
80bcaf34
TM		 5519 struct ocfs2_xattr_bucket *bucket,
5520 const char *name)
01225596 5521{
3e632946 5522 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
80bcaf34
TM		 5523 u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name));
5524
5525 if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash))
5526 return 0;
01225596
TM		 5527
5528 if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash ==
5529 xh->xh_entries[0].xe_name_hash) {
5530 mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, "
5531 "hash = %u\n",
9c7759aa 5532 (unsigned long long)bucket_blkno(bucket),
01225596
TM		 5533 le32_to_cpu(xh->xh_entries[0].xe_name_hash));
5534 return -ENOSPC;
5535 }
5536
5537 return 0;
5538}
5539
c5d95df5
JB		 5540/*
5541 * Try to set the entry in the current bucket. If we fail, the caller
5542 * will handle getting us another bucket.
5543 */
5544static int ocfs2_xattr_set_entry_bucket(struct inode *inode,
5545 struct ocfs2_xattr_info *xi,
5546 struct ocfs2_xattr_search *xs,
5547 struct ocfs2_xattr_set_ctxt *ctxt)
01225596 5548{
c5d95df5
JB		 5549 int ret;
5550 struct ocfs2_xa_loc loc;
01225596 5551
402b4183 5552 trace_ocfs2_xattr_set_entry_bucket(xi->xi_name);
01225596 5553
c5d95df5
JB		 5554 ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
5555 xs->not_found ? NULL : xs->here);
5556 ret = ocfs2_xa_set(&loc, xi, ctxt);
5557 if (!ret) {
5558 xs->here = loc.xl_entry;
5559 goto out;
5560 }
5561 if (ret != -ENOSPC) {
5562 mlog_errno(ret);
5563 goto out;
5564 }
01225596 5565
c5d95df5
JB		 5566 /* Ok, we need space. Let's try defragmenting the bucket. */
5567 ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
5568 xs->bucket);
5569 if (ret) {
5570 mlog_errno(ret);
5571 goto out;
5572 }
01225596 5573
c5d95df5
JB		 5574 ret = ocfs2_xa_set(&loc, xi, ctxt);
5575 if (!ret) {
5576 xs->here = loc.xl_entry;
5577 goto out;
01225596 5578 }
c5d95df5
JB		 5579 if (ret != -ENOSPC)
5580 mlog_errno(ret);
01225596 5581
01225596 5582
c5d95df5 5583out:
c5d95df5
JB		 5584 return ret;
5585}
01225596 5586
c5d95df5
JB		 5587static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
5588 struct ocfs2_xattr_info *xi,
5589 struct ocfs2_xattr_search *xs,
5590 struct ocfs2_xattr_set_ctxt *ctxt)
5591{
5592 int ret;
01225596 5593
402b4183 5594 trace_ocfs2_xattr_set_entry_index_block(xi->xi_name);
01225596 5595
c5d95df5
JB		 5596 ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
5597 if (!ret)
5598 goto out;
5599 if (ret != -ENOSPC) {
5600 mlog_errno(ret);
5601 goto out;
5602 }
01225596 5603
c5d95df5 5604 /* Ack, need more space. Let's try to get another bucket! */
01225596 5605
c5d95df5
JB		 5606 /*
5607 * We do not allow for overlapping ranges between buckets. And
5608 * the maximum number of collisions we will allow for then is
5609 * one bucket's worth, so check it here whether we need to
5610 * add a new bucket for the insert.
5611 */
5612 ret = ocfs2_check_xattr_bucket_collision(inode,
91f2033f 5613 xs->bucket,
c5d95df5
JB		 5614 xi->xi_name);
5615 if (ret) {
5616 mlog_errno(ret);
5617 goto out;
5618 }
01225596 5619
c5d95df5
JB		 5620 ret = ocfs2_add_new_xattr_bucket(inode,
5621 xs->xattr_bh,
5622 xs->bucket,
5623 ctxt);
5624 if (ret) {
5625 mlog_errno(ret);
5626 goto out;
01225596
TM		 5627 }
5628
c5d95df5
JB		 5629 /*
5630 * ocfs2_add_new_xattr_bucket() will have updated
5631 * xs->bucket if it moved, but it will not have updated
5632 * any of the other search fields. Thus, we drop it and
5633 * re-search. Everything should be cached, so it'll be
5634 * quick.
5635 */
5636 ocfs2_xattr_bucket_relse(xs->bucket);
5637 ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
5638 xi->xi_name_index,
5639 xi->xi_name, xs);
5640 if (ret && ret != -ENODATA)
5641 goto out;
5642 xs->not_found = ret;
5643
5644 /* Ok, we have a new bucket, let's try again */
5645 ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
5646 if (ret && (ret != -ENOSPC))
5647 mlog_errno(ret);
5648
01225596 5649out:
01225596
TM		 5650 return ret;
5651}
a3944256
TM		 5652
5653static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
5654 struct ocfs2_xattr_bucket *bucket,
5655 void *para)
5656{
ce9c5a54 5657 int ret = 0, ref_credits;
3e632946 5658 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
a3944256
TM		 5659 u16 i;
5660 struct ocfs2_xattr_entry *xe;
78f30c31
TM		 5661 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5662 struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
548b0f22
JB		 5663 int credits = ocfs2_remove_extent_credits(osb->sb) +
5664 ocfs2_blocks_per_xattr_bucket(inode->i_sb);
ce9c5a54
TM		 5665 struct ocfs2_xattr_value_root *xv;
5666 struct ocfs2_rm_xattr_bucket_para *args =
5667 (struct ocfs2_rm_xattr_bucket_para *)para;
78f30c31
TM		 5668
5669 ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
a3944256
TM		 5670
5671 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
5672 xe = &xh->xh_entries[i];
5673 if (ocfs2_xattr_is_local(xe))
5674 continue;
5675
ce9c5a54
TM		 5676 ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket,
5677 i, &xv, NULL);
023d4ea3
JQ		 5678 if (ret) {
5679 mlog_errno(ret);
5680 break;
5681 }
ce9c5a54
TM		 5682
5683 ret = ocfs2_lock_xattr_remove_allocators(inode, xv,
5684 args->ref_ci,
5685 args->ref_root_bh,
5686 &ctxt.meta_ac,
5687 &ref_credits);
5688
5689 ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits);
88c3b062
TM		 5690 if (IS_ERR(ctxt.handle)) {
5691 ret = PTR_ERR(ctxt.handle);
5692 mlog_errno(ret);
5693 break;
5694 }
5695
548b0f22 5696 ret = ocfs2_xattr_bucket_value_truncate(inode, bucket,
78f30c31 5697 i, 0, &ctxt);
88c3b062
TM		 5698
5699 ocfs2_commit_trans(osb, ctxt.handle);
ce9c5a54
TM		 5700 if (ctxt.meta_ac) {
5701 ocfs2_free_alloc_context(ctxt.meta_ac);
5702 ctxt.meta_ac = NULL;
5703 }
a3944256
TM		 5704 if (ret) {
5705 mlog_errno(ret);
5706 break;
5707 }
5708 }
5709
ce9c5a54
TM		 5710 if (ctxt.meta_ac)
5711 ocfs2_free_alloc_context(ctxt.meta_ac);
78f30c31
TM		 5712 ocfs2_schedule_truncate_log_flush(osb, 1);
5713 ocfs2_run_deallocs(osb, &ctxt.dealloc);
a3944256
TM		 5714 return ret;
5715}
5716
492a8a33
TM		 5717/*
5718 * Whenever we modify a xattr value root in the bucket(e.g, CoW
5719 * or change the extent record flag), we need to recalculate
5720 * the metaecc for the whole bucket. So it is done here.
5721 *
5722 * Note:
5723 * We have to give the extra credits for the caller.
5724 */
5725static int ocfs2_xattr_bucket_post_refcount(struct inode *inode,
5726 handle_t *handle,
5727 void *para)
5728{
5729 int ret;
5730 struct ocfs2_xattr_bucket *bucket =
5731 (struct ocfs2_xattr_bucket *)para;
5732
5733 ret = ocfs2_xattr_bucket_journal_access(handle, bucket,
5734 OCFS2_JOURNAL_ACCESS_WRITE);
5735 if (ret) {
5736 mlog_errno(ret);
5737 return ret;
5738 }
5739
5740 ocfs2_xattr_bucket_journal_dirty(handle, bucket);
5741
5742 return 0;
5743}
5744
5745/*
5746 * Special action we need if the xattr value is refcounted.
5747 *
5748 * 1. If the xattr is refcounted, lock the tree.
5749 * 2. CoW the xattr if we are setting the new value and the value
5750 * will be stored outside.
5751 * 3. In other case, decrease_refcount will work for us, so just
5752 * lock the refcount tree, calculate the meta and credits is OK.
5753 *
5754 * We have to do CoW before ocfs2_init_xattr_set_ctxt since
5755 * currently CoW is a completed transaction, while this function
5756 * will also lock the allocators and let us deadlock. So we will
5757 * CoW the whole xattr value.
5758 */
5759static int ocfs2_prepare_refcount_xattr(struct inode *inode,
5760 struct ocfs2_dinode *di,
5761 struct ocfs2_xattr_info *xi,
5762 struct ocfs2_xattr_search *xis,
5763 struct ocfs2_xattr_search *xbs,
5764 struct ocfs2_refcount_tree **ref_tree,
5765 int *meta_add,
5766 int *credits)
5767{
5768 int ret = 0;
5769 struct ocfs2_xattr_block *xb;
5770 struct ocfs2_xattr_entry *xe;
5771 char *base;
5772 u32 p_cluster, num_clusters;
5773 unsigned int ext_flags;
5774 int name_offset, name_len;
5775 struct ocfs2_xattr_value_buf vb;
5776 struct ocfs2_xattr_bucket *bucket = NULL;
5777 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
5778 struct ocfs2_post_refcount refcount;
5779 struct ocfs2_post_refcount *p = NULL;
5780 struct buffer_head *ref_root_bh = NULL;
5781
5782 if (!xis->not_found) {
5783 xe = xis->here;
5784 name_offset = le16_to_cpu(xe->xe_name_offset);
5785 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
5786 base = xis->base;
5787 vb.vb_bh = xis->inode_bh;
5788 vb.vb_access = ocfs2_journal_access_di;
5789 } else {
5790 int i, block_off = 0;
5791 xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
5792 xe = xbs->here;
5793 name_offset = le16_to_cpu(xe->xe_name_offset);
5794 name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
5795 i = xbs->here - xbs->header->xh_entries;
5796
5797 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
fd68a894 5798 ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
492a8a33
TM		 5799 bucket_xh(xbs->bucket),
5800 i, &block_off,
5801 &name_offset);
5802 if (ret) {
5803 mlog_errno(ret);
5804 goto out;
5805 }
5806 base = bucket_block(xbs->bucket, block_off);
5807 vb.vb_bh = xbs->bucket->bu_bhs[block_off];
5808 vb.vb_access = ocfs2_journal_access;
5809
5810 if (ocfs2_meta_ecc(osb)) {
5811 /*create parameters for ocfs2_post_refcount. */
5812 bucket = xbs->bucket;
5813 refcount.credits = bucket->bu_blocks;
5814 refcount.para = bucket;
5815 refcount.func =
5816 ocfs2_xattr_bucket_post_refcount;
5817 p = &refcount;
5818 }
5819 } else {
5820 base = xbs->base;
5821 vb.vb_bh = xbs->xattr_bh;
5822 vb.vb_access = ocfs2_journal_access_xb;
5823 }
5824 }
5825
5826 if (ocfs2_xattr_is_local(xe))
5827 goto out;
5828
5829 vb.vb_xv = (struct ocfs2_xattr_value_root *)
5830 (base + name_offset + name_len);
5831
5832 ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster,
5833 &num_clusters, &vb.vb_xv->xr_list,
5834 &ext_flags);
5835 if (ret) {
5836 mlog_errno(ret);
5837 goto out;
5838 }
5839
5840 /*
5841 * We just need to check the 1st extent record, since we always
5842 * CoW the whole xattr. So there shouldn't be a xattr with
5843 * some REFCOUNT extent recs after the 1st one.
5844 */
5845 if (!(ext_flags & OCFS2_EXT_REFCOUNTED))
5846 goto out;
5847
5848 ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc),
5849 1, ref_tree, &ref_root_bh);
5850 if (ret) {
5851 mlog_errno(ret);
5852 goto out;
5853 }
5854
5855 /*
5856 * If we are deleting the xattr or the new size will be stored inside,
5857 * cool, leave it there, the xattr truncate process will remove them
5858 * for us(it still needs the refcount tree lock and the meta, credits).
5859 * And the worse case is that every cluster truncate will split the
5860 * refcount tree, and make the original extent become 3. So we will need
5861 * 2 * cluster more extent recs at most.
5862 */
6b240ff6 5863 if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) {
492a8a33
TM		 5864
5865 ret = ocfs2_refcounted_xattr_delete_need(inode,
5866 &(*ref_tree)->rf_ci,
5867 ref_root_bh, vb.vb_xv,
5868 meta_add, credits);
5869 if (ret)
5870 mlog_errno(ret);
5871 goto out;
5872 }
5873
5874 ret = ocfs2_refcount_cow_xattr(inode, di, &vb,
5875 *ref_tree, ref_root_bh, 0,
5876 le32_to_cpu(vb.vb_xv->xr_clusters), p);
5877 if (ret)
5878 mlog_errno(ret);
5879
5880out:
5881 brelse(ref_root_bh);
5882 return ret;
5883}
5884
0129241e
TM		 5885/*
5886 * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root.
5887 * The physical clusters will be added to refcount tree.
5888 */
5889static int ocfs2_xattr_value_attach_refcount(struct inode *inode,
5890 struct ocfs2_xattr_value_root *xv,
5891 struct ocfs2_extent_tree *value_et,
5892 struct ocfs2_caching_info *ref_ci,
5893 struct buffer_head *ref_root_bh,
5894 struct ocfs2_cached_dealloc_ctxt *dealloc,
5895 struct ocfs2_post_refcount *refcount)
5896{
5897 int ret = 0;
5898 u32 clusters = le32_to_cpu(xv->xr_clusters);
5899 u32 cpos, p_cluster, num_clusters;
5900 struct ocfs2_extent_list *el = &xv->xr_list;
5901 unsigned int ext_flags;
5902
5903 cpos = 0;
5904 while (cpos < clusters) {
5905 ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster,
5906 &num_clusters, el, &ext_flags);
17caf955
JQ		 5907 if (ret) {
5908 mlog_errno(ret);
5909 break;
5910 }
0129241e
TM		 5911
5912 cpos += num_clusters;
5913 if ((ext_flags & OCFS2_EXT_REFCOUNTED))
5914 continue;
5915
5916 BUG_ON(!p_cluster);
5917
5918 ret = ocfs2_add_refcount_flag(inode, value_et,
5919 ref_ci, ref_root_bh,
5920 cpos - num_clusters,
5921 p_cluster, num_clusters,
5922 dealloc, refcount);
5923 if (ret) {
5924 mlog_errno(ret);
5925 break;
5926 }
5927 }
5928
5929 return ret;
5930}
5931
5932/*
5933 * Given a normal ocfs2_xattr_header, refcount all the entries which
5934 * have value stored outside.
5935 * Used for xattrs stored in inode and ocfs2_xattr_block.
5936 */
5937static int ocfs2_xattr_attach_refcount_normal(struct inode *inode,
5938 struct ocfs2_xattr_value_buf *vb,
5939 struct ocfs2_xattr_header *header,
5940 struct ocfs2_caching_info *ref_ci,
5941 struct buffer_head *ref_root_bh,
5942 struct ocfs2_cached_dealloc_ctxt *dealloc)
5943{
5944
5945 struct ocfs2_xattr_entry *xe;
5946 struct ocfs2_xattr_value_root *xv;
5947 struct ocfs2_extent_tree et;
5948 int i, ret = 0;
5949
5950 for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
5951 xe = &header->xh_entries[i];
5952
5953 if (ocfs2_xattr_is_local(xe))
5954 continue;
5955
5956 xv = (struct ocfs2_xattr_value_root *)((void *)header +
5957 le16_to_cpu(xe->xe_name_offset) +
5958 OCFS2_XATTR_SIZE(xe->xe_name_len));
5959
5960 vb->vb_xv = xv;
5961 ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb);
5962
5963 ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et,
5964 ref_ci, ref_root_bh,
5965 dealloc, NULL);
5966 if (ret) {
5967 mlog_errno(ret);
5968 break;
5969 }
5970 }
5971
5972 return ret;
5973}
5974
5975static int ocfs2_xattr_inline_attach_refcount(struct inode *inode,
5976 struct buffer_head *fe_bh,
5977 struct ocfs2_caching_info *ref_ci,
5978 struct buffer_head *ref_root_bh,
5979 struct ocfs2_cached_dealloc_ctxt *dealloc)
5980{
5981 struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data;
5982 struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *)
5983 (fe_bh->b_data + inode->i_sb->s_blocksize -
5984 le16_to_cpu(di->i_xattr_inline_size));
5985 struct ocfs2_xattr_value_buf vb = {
5986 .vb_bh = fe_bh,
5987 .vb_access = ocfs2_journal_access_di,
5988 };
5989
5990 return ocfs2_xattr_attach_refcount_normal(inode, &vb, header,
5991 ref_ci, ref_root_bh, dealloc);
5992}
5993
5994struct ocfs2_xattr_tree_value_refcount_para {
5995 struct ocfs2_caching_info *ref_ci;
5996 struct buffer_head *ref_root_bh;
5997 struct ocfs2_cached_dealloc_ctxt *dealloc;
5998};
5999
6000static int ocfs2_get_xattr_tree_value_root(struct super_block *sb,
6001 struct ocfs2_xattr_bucket *bucket,
6002 int offset,
6003 struct ocfs2_xattr_value_root **xv,
6004 struct buffer_head **bh)
6005{
6006 int ret, block_off, name_offset;
6007 struct ocfs2_xattr_header *xh = bucket_xh(bucket);
6008 struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
6009 void *base;
6010
6011 ret = ocfs2_xattr_bucket_get_name_value(sb,
6012 bucket_xh(bucket),
6013 offset,
6014 &block_off,
6015 &name_offset);
6016 if (ret) {
6017 mlog_errno(ret);
6018 goto out;
6019 }
6020
6021 base = bucket_block(bucket, block_off);
6022
6023 *xv = (struct ocfs2_xattr_value_root *)(base + name_offset +
6024 OCFS2_XATTR_SIZE(xe->xe_name_len));
6025
6026 if (bh)
6027 *bh = bucket->bu_bhs[block_off];
6028out:
6029 return ret;
6030}
6031
6032/*
6033 * For a given xattr bucket, refcount all the entries which
6034 * have value stored outside.
6035 */
6036static int ocfs2_xattr_bucket_value_refcount(struct inode *inode,
6037 struct ocfs2_xattr_bucket *bucket,
6038 void *para)
6039{
6040 int i, ret = 0;
6041 struct ocfs2_extent_tree et;
6042 struct ocfs2_xattr_tree_value_refcount_para *ref =
6043 (struct ocfs2_xattr_tree_value_refcount_para *)para;
6044 struct ocfs2_xattr_header *xh =
6045 (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
6046 struct ocfs2_xattr_entry *xe;
6047 struct ocfs2_xattr_value_buf vb = {
6048 .vb_access = ocfs2_journal_access,
6049 };
6050 struct ocfs2_post_refcount refcount = {
6051 .credits = bucket->bu_blocks,
6052 .para = bucket,
6053 .func = ocfs2_xattr_bucket_post_refcount,
6054 };
6055 struct ocfs2_post_refcount *p = NULL;
6056
6057 /* We only need post_refcount if we support metaecc. */
6058 if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb)))
6059 p = &refcount;
6060
402b4183
TM		 6061 trace_ocfs2_xattr_bucket_value_refcount(
6062 (unsigned long long)bucket_blkno(bucket),
6063 le16_to_cpu(xh->xh_count));
0129241e
TM		 6064 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
6065 xe = &xh->xh_entries[i];
6066
6067 if (ocfs2_xattr_is_local(xe))
6068 continue;
6069
6070 ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i,
6071 &vb.vb_xv, &vb.vb_bh);
6072 if (ret) {
6073 mlog_errno(ret);
6074 break;
6075 }
6076
6077 ocfs2_init_xattr_value_extent_tree(&et,
6078 INODE_CACHE(inode), &vb);
6079
6080 ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv,
6081 &et, ref->ref_ci,
6082 ref->ref_root_bh,
6083 ref->dealloc, p);
6084 if (ret) {
6085 mlog_errno(ret);
6086 break;
6087 }
6088 }
6089
6090 return ret;
6091
6092}
6093
6094static int ocfs2_refcount_xattr_tree_rec(struct inode *inode,
6095 struct buffer_head *root_bh,
6096 u64 blkno, u32 cpos, u32 len, void *para)
6097{
6098 return ocfs2_iterate_xattr_buckets(inode, blkno, len,
6099 ocfs2_xattr_bucket_value_refcount,
6100 para);
6101}
6102
6103static int ocfs2_xattr_block_attach_refcount(struct inode *inode,
6104 struct buffer_head *blk_bh,
6105 struct ocfs2_caching_info *ref_ci,
6106 struct buffer_head *ref_root_bh,
6107 struct ocfs2_cached_dealloc_ctxt *dealloc)
6108{
6109 int ret = 0;
6110 struct ocfs2_xattr_block *xb =
6111 (struct ocfs2_xattr_block *)blk_bh->b_data;
6112
6113 if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) {
6114 struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header;
6115 struct ocfs2_xattr_value_buf vb = {
6116 .vb_bh = blk_bh,
6117 .vb_access = ocfs2_journal_access_xb,
6118 };
6119
6120 ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header,
6121 ref_ci, ref_root_bh,
6122 dealloc);
6123 } else {
6124 struct ocfs2_xattr_tree_value_refcount_para para = {
6125 .ref_ci = ref_ci,
6126 .ref_root_bh = ref_root_bh,
6127 .dealloc = dealloc,
6128 };
6129
6130 ret = ocfs2_iterate_xattr_index_block(inode, blk_bh,
6131 ocfs2_refcount_xattr_tree_rec,
6132 &para);
6133 }
6134
6135 return ret;
6136}
6137
6138int ocfs2_xattr_attach_refcount_tree(struct inode *inode,
6139 struct buffer_head *fe_bh,
6140 struct ocfs2_caching_info *ref_ci,
6141 struct buffer_head *ref_root_bh,
6142 struct ocfs2_cached_dealloc_ctxt *dealloc)
6143{
6144 int ret = 0;
6145 struct ocfs2_inode_info *oi = OCFS2_I(inode);
6146 struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data;
6147 struct buffer_head *blk_bh = NULL;
6148
6149 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
6150 ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh,
6151 ref_ci, ref_root_bh,
6152 dealloc);
6153 if (ret) {
6154 mlog_errno(ret);
6155 goto out;
6156 }
6157 }
6158
6159 if (!di->i_xattr_loc)
6160 goto out;
6161
6162 ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc),
6163 &blk_bh);
6164 if (ret < 0) {
6165 mlog_errno(ret);
6166 goto out;
6167 }
6168
6169 ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci,
6170 ref_root_bh, dealloc);
6171 if (ret)
6172 mlog_errno(ret);
6173
6174 brelse(blk_bh);
6175out:
6176
6177 return ret;
6178}
6179
0fe9b66c 6180typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe);
2999d12f
TM		 6181/*
6182 * Store the information we need in xattr reflink.
6183 * old_bh and new_bh are inode bh for the old and new inode.
6184 */
6185struct ocfs2_xattr_reflink {
6186 struct inode *old_inode;
6187 struct inode *new_inode;
6188 struct buffer_head *old_bh;
6189 struct buffer_head *new_bh;
6190 struct ocfs2_caching_info *ref_ci;
6191 struct buffer_head *ref_root_bh;
6192 struct ocfs2_cached_dealloc_ctxt *dealloc;
0fe9b66c 6193 should_xattr_reflinked *xattr_reflinked;
2999d12f
TM		 6194};
6195
6196/*
6197 * Given a xattr header and xe offset,
6198 * return the proper xv and the corresponding bh.
6199 * xattr in inode, block and xattr tree have different implementaions.
6200 */
6201typedef int (get_xattr_value_root)(struct super_block *sb,
6202 struct buffer_head *bh,
6203 struct ocfs2_xattr_header *xh,
6204 int offset,
6205 struct ocfs2_xattr_value_root **xv,
6206 struct buffer_head **ret_bh,
6207 void *para);
6208
6209/*
6210 * Calculate all the xattr value root metadata stored in this xattr header and
6211 * credits we need if we create them from the scratch.
6212 * We use get_xattr_value_root so that all types of xattr container can use it.
6213 */
6214static int ocfs2_value_metas_in_xattr_header(struct super_block *sb,
6215 struct buffer_head *bh,
6216 struct ocfs2_xattr_header *xh,
6217 int *metas, int *credits,
6218 int *num_recs,
6219 get_xattr_value_root *func,
6220 void *para)
6221{
6222 int i, ret = 0;
6223 struct ocfs2_xattr_value_root *xv;
6224 struct ocfs2_xattr_entry *xe;
6225
6226 for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
6227 xe = &xh->xh_entries[i];
6228 if (ocfs2_xattr_is_local(xe))
6229 continue;
6230
6231 ret = func(sb, bh, xh, i, &xv, NULL, para);
6232 if (ret) {
6233 mlog_errno(ret);
6234 break;
6235 }
6236
6237 *metas += le16_to_cpu(xv->xr_list.l_tree_depth) *
6238 le16_to_cpu(xv->xr_list.l_next_free_rec);
6239
6240 *credits += ocfs2_calc_extend_credits(sb,
06f9da6e 6241 &def_xv.xv.xr_list);
2999d12f
TM		 6242
6243 /*
6244 * If the value is a tree with depth > 1, We don't go deep
6245 * to the extent block, so just calculate a maximum record num.
6246 */
6247 if (!xv->xr_list.l_tree_depth)
8ff6af88 6248 *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec);
2999d12f
TM		 6249 else
6250 *num_recs += ocfs2_clusters_for_bytes(sb,
6251 XATTR_SIZE_MAX);
6252 }
6253
6254 return ret;
6255}
6256
6257/* Used by xattr inode and block to return the right xv and buffer_head. */
6258static int ocfs2_get_xattr_value_root(struct super_block *sb,
6259 struct buffer_head *bh,
6260 struct ocfs2_xattr_header *xh,
6261 int offset,
6262 struct ocfs2_xattr_value_root **xv,
6263 struct buffer_head **ret_bh,
6264 void *para)
6265{
6266 struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset];
6267
6268 *xv = (struct ocfs2_xattr_value_root *)((void *)xh +
6269 le16_to_cpu(xe->xe_name_offset) +
6270 OCFS2_XATTR_SIZE(xe->xe_name_len));
6271
6272 if (ret_bh)
6273 *ret_bh = bh;
6274
6275 return 0;
6276}
6277
6278/*
6279 * Lock the meta_ac and caculate how much credits we need for reflink xattrs.
6280 * It is only used for inline xattr and xattr block.
6281 */
6282static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb,
6283 struct ocfs2_xattr_header *xh,
6284 struct buffer_head *ref_root_bh,
6285 int *credits,
6286 struct ocfs2_alloc_context **meta_ac)
6287{
6288 int ret, meta_add = 0, num_recs = 0;
6289 struct ocfs2_refcount_block *rb =
6290 (struct ocfs2_refcount_block *)ref_root_bh->b_data;
6291
6292 *credits = 0;
6293
6294 ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh,
6295 &meta_add, credits, &num_recs,
6296 ocfs2_get_xattr_value_root,
6297 NULL);
6298 if (ret) {
6299 mlog_errno(ret);
6300 goto out;
6301 }
6302
6303 /*
6304 * We need to add/modify num_recs in refcount tree, so just calculate
6305 * an approximate number we need for refcount tree change.
6306 * Sometimes we need to split the tree, and after split, half recs
6307 * will be moved to the new block, and a new block can only provide
6308 * half number of recs. So we multiple new blocks by 2.
6309 */
6310 num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2;
6311 meta_add += num_recs;
6312 *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
6313 if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
6314 *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
6315 le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
6316 else
6317 *credits += 1;
6318
6319 ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac);
6320 if (ret)
6321 mlog_errno(ret);
6322
6323out:
6324 return ret;
6325}
6326
6327/*
6328 * Given a xattr header, reflink all the xattrs in this container.
6329 * It can be used for inode, block and bucket.
6330 *
6331 * NOTE:
6332 * Before we call this function, the caller has memcpy the xattr in
6333 * old_xh to the new_xh.
0fe9b66c
TM		 6334 *
6335 * If args.xattr_reflinked is set, call it to decide whether the xe should
6336 * be reflinked or not. If not, remove it from the new xattr header.
2999d12f
TM		 6337 */
6338static int ocfs2_reflink_xattr_header(handle_t *handle,
6339 struct ocfs2_xattr_reflink *args,
6340 struct buffer_head *old_bh,
6341 struct ocfs2_xattr_header *xh,
6342 struct buffer_head *new_bh,
6343 struct ocfs2_xattr_header *new_xh,
6344 struct ocfs2_xattr_value_buf *vb,
6345 struct ocfs2_alloc_context *meta_ac,
6346 get_xattr_value_root *func,
6347 void *para)
6348{
0fe9b66c 6349 int ret = 0, i, j;
2999d12f
TM		 6350 struct super_block *sb = args->old_inode->i_sb;
6351 struct buffer_head *value_bh;
0fe9b66c 6352 struct ocfs2_xattr_entry *xe, *last;
2999d12f
TM		 6353 struct ocfs2_xattr_value_root *xv, *new_xv;
6354 struct ocfs2_extent_tree data_et;
6355 u32 clusters, cpos, p_cluster, num_clusters;
6356 unsigned int ext_flags = 0;
6357
402b4183
TM		 6358 trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr,
6359 le16_to_cpu(xh->xh_count));
0fe9b66c
TM		 6360
6361 last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)];
6362 for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) {
2999d12f
TM		 6363 xe = &xh->xh_entries[i];
6364
0fe9b66c
TM		 6365 if (args->xattr_reflinked && !args->xattr_reflinked(xe)) {
6366 xe = &new_xh->xh_entries[j];
6367
6368 le16_add_cpu(&new_xh->xh_count, -1);
6369 if (new_xh->xh_count) {
6370 memmove(xe, xe + 1,
6371 (void *)last - (void *)xe);
6372 memset(last, 0,
6373 sizeof(struct ocfs2_xattr_entry));
6374 }
6375
6376 /*
6377 * We don't want j to increase in the next round since
6378 * it is already moved ahead.
6379 */
6380 j--;
6381 continue;
6382 }
6383
2999d12f
TM		 6384 if (ocfs2_xattr_is_local(xe))
6385 continue;
6386
6387 ret = func(sb, old_bh, xh, i, &xv, NULL, para);
6388 if (ret) {
6389 mlog_errno(ret);
6390 break;
6391 }
6392
0fe9b66c 6393 ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para);
2999d12f
TM		 6394 if (ret) {
6395 mlog_errno(ret);
6396 break;
6397 }
6398
6399 /*
6400 * For the xattr which has l_tree_depth = 0, all the extent
6401 * recs have already be copied to the new xh with the
6402 * propriate OCFS2_EXT_REFCOUNTED flag we just need to
6403 * increase the refount count int the refcount tree.
6404 *
6405 * For the xattr which has l_tree_depth > 0, we need
6406 * to initialize it to the empty default value root,
6407 * and then insert the extents one by one.
6408 */
6409 if (xv->xr_list.l_tree_depth) {
32ed0bd7 6410 memcpy(new_xv, &def_xv, OCFS2_XATTR_ROOT_SIZE);
2999d12f
TM		 6411 vb->vb_xv = new_xv;
6412 vb->vb_bh = value_bh;
6413 ocfs2_init_xattr_value_extent_tree(&data_et,
6414 INODE_CACHE(args->new_inode), vb);
6415 }
6416
6417 clusters = le32_to_cpu(xv->xr_clusters);
6418 cpos = 0;
6419 while (cpos < clusters) {
6420 ret = ocfs2_xattr_get_clusters(args->old_inode,
6421 cpos,
6422 &p_cluster,
6423 &num_clusters,
6424 &xv->xr_list,
6425 &ext_flags);
6426 if (ret) {
6427 mlog_errno(ret);
6428 goto out;
6429 }
6430
6431 BUG_ON(!p_cluster);
6432
6433 if (xv->xr_list.l_tree_depth) {
6434 ret = ocfs2_insert_extent(handle,
6435 &data_et, cpos,
6436 ocfs2_clusters_to_blocks(
6437 args->old_inode->i_sb,
6438 p_cluster),
6439 num_clusters, ext_flags,
6440 meta_ac);
6441 if (ret) {
6442 mlog_errno(ret);
6443 goto out;
6444 }
6445 }
6446
6447 ret = ocfs2_increase_refcount(handle, args->ref_ci,
6448 args->ref_root_bh,
6449 p_cluster, num_clusters,
6450 meta_ac, args->dealloc);
6451 if (ret) {
6452 mlog_errno(ret);
6453 goto out;
6454 }
6455
6456 cpos += num_clusters;
6457 }
6458 }
6459
6460out:
6461 return ret;
6462}
6463
6464static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args)
6465{
6466 int ret = 0, credits = 0;
6467 handle_t *handle;
6468 struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb);
6469 struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data;
6470 int inline_size = le16_to_cpu(di->i_xattr_inline_size);
6471 int header_off = osb->sb->s_blocksize - inline_size;
6472 struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)
6473 (args->old_bh->b_data + header_off);
6474 struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *)
6475 (args->new_bh->b_data + header_off);
6476 struct ocfs2_alloc_context *meta_ac = NULL;
6477 struct ocfs2_inode_info *new_oi;
6478 struct ocfs2_dinode *new_di;
6479 struct ocfs2_xattr_value_buf vb = {
6480 .vb_bh = args->new_bh,
6481 .vb_access = ocfs2_journal_access_di,
6482 };
6483
6484 ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
6485 &credits, &meta_ac);
6486 if (ret) {
6487 mlog_errno(ret);
6488 goto out;
6489 }
6490
6491 handle = ocfs2_start_trans(osb, credits);
6492 if (IS_ERR(handle)) {
6493 ret = PTR_ERR(handle);
6494 mlog_errno(ret);
6495 goto out;
6496 }
6497
6498 ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode),
6499 args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE);
6500 if (ret) {
6501 mlog_errno(ret);
6502 goto out_commit;
6503 }
6504
6505 memcpy(args->new_bh->b_data + header_off,
6506 args->old_bh->b_data + header_off, inline_size);
6507
6508 new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
6509 new_di->i_xattr_inline_size = cpu_to_le16(inline_size);
6510
6511 ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh,
6512 args->new_bh, new_xh, &vb, meta_ac,
6513 ocfs2_get_xattr_value_root, NULL);
6514 if (ret) {
6515 mlog_errno(ret);
6516 goto out_commit;
6517 }
6518
6519 new_oi = OCFS2_I(args->new_inode);
ef962df0
JB		 6520 /*
6521 * Adjust extent record count to reserve space for extended attribute.
6522 * Inline data count had been adjusted in ocfs2_duplicate_inline_data().
6523 */
6524 if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) &&
6525 !(ocfs2_inode_is_fast_symlink(args->new_inode))) {
6526 struct ocfs2_extent_list *el = &new_di->id2.i_list;
6527 le16_add_cpu(&el->l_count, -(inline_size /
6528 sizeof(struct ocfs2_extent_rec)));
6529 }
2999d12f
TM		 6530 spin_lock(&new_oi->ip_lock);
6531 new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL;
6532 new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
6533 spin_unlock(&new_oi->ip_lock);
6534
6535 ocfs2_journal_dirty(handle, args->new_bh);
6536
6537out_commit:
6538 ocfs2_commit_trans(osb, handle);
6539
6540out:
6541 if (meta_ac)
6542 ocfs2_free_alloc_context(meta_ac);
6543 return ret;
6544}
6545
6546static int ocfs2_create_empty_xattr_block(struct inode *inode,
6547 struct buffer_head *fe_bh,
6548 struct buffer_head **ret_bh,
6549 int indexed)
6550{
6551 int ret;
2999d12f 6552 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
b2317968 6553 struct ocfs2_xattr_set_ctxt ctxt;
2999d12f 6554
b2317968
TM		 6555 memset(&ctxt, 0, sizeof(ctxt));
6556 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac);
2999d12f
TM		 6557 if (ret < 0) {
6558 mlog_errno(ret);
6559 return ret;
6560 }
6561
d3981544
JB		 6562 ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS);
6563 if (IS_ERR(ctxt.handle)) {
6564 ret = PTR_ERR(ctxt.handle);
2999d12f
TM		 6565 mlog_errno(ret);
6566 goto out;
6567 }
6568
402b4183
TM		 6569 trace_ocfs2_create_empty_xattr_block(
6570 (unsigned long long)fe_bh->b_blocknr, indexed);
d3981544
JB		 6571 ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed,
6572 ret_bh);
2999d12f
TM		 6573 if (ret)
6574 mlog_errno(ret);
6575
d3981544 6576 ocfs2_commit_trans(osb, ctxt.handle);
2999d12f 6577out:
b2317968 6578 ocfs2_free_alloc_context(ctxt.meta_ac);
2999d12f
TM		 6579 return ret;
6580}
6581
6582static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args,
6583 struct buffer_head *blk_bh,
6584 struct buffer_head *new_blk_bh)
6585{
6586 int ret = 0, credits = 0;
6587 handle_t *handle;
6588 struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode);
6589 struct ocfs2_dinode *new_di;
6590 struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb);
6591 int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header);
6592 struct ocfs2_xattr_block *xb =
6593 (struct ocfs2_xattr_block *)blk_bh->b_data;
6594 struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header;
6595 struct ocfs2_xattr_block *new_xb =
6596 (struct ocfs2_xattr_block *)new_blk_bh->b_data;
6597 struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header;
6598 struct ocfs2_alloc_context *meta_ac;
6599 struct ocfs2_xattr_value_buf vb = {
6600 .vb_bh = new_blk_bh,
6601 .vb_access = ocfs2_journal_access_xb,
6602 };
6603
6604 ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh,
6605 &credits, &meta_ac);
6606 if (ret) {
6607 mlog_errno(ret);
6608 return ret;
6609 }
6610
6611 /* One more credits in case we need to add xattr flags in new inode. */
6612 handle = ocfs2_start_trans(osb, credits + 1);
6613 if (IS_ERR(handle)) {
6614 ret = PTR_ERR(handle);
6615 mlog_errno(ret);
6616 goto out;
6617 }
6618
6619 if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
6620 ret = ocfs2_journal_access_di(handle,
6621 INODE_CACHE(args->new_inode),
6622 args->new_bh,
6623 OCFS2_JOURNAL_ACCESS_WRITE);
6624 if (ret) {
6625 mlog_errno(ret);
6626 goto out_commit;
6627 }
6628 }
6629
6630 ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode),
6631 new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE);
6632 if (ret) {
6633 mlog_errno(ret);
6634 goto out_commit;
6635 }
6636
6637 memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off,
6638 osb->sb->s_blocksize - header_off);
6639
6640 ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh,
6641 new_blk_bh, new_xh, &vb, meta_ac,
6642 ocfs2_get_xattr_value_root, NULL);
6643 if (ret) {
6644 mlog_errno(ret);
6645 goto out_commit;
6646 }
6647
6648 ocfs2_journal_dirty(handle, new_blk_bh);
6649
6650 if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) {
6651 new_di = (struct ocfs2_dinode *)args->new_bh->b_data;
6652 spin_lock(&new_oi->ip_lock);
6653 new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL;
6654 new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features);
6655 spin_unlock(&new_oi->ip_lock);
6656
6657 ocfs2_journal_dirty(handle, args->new_bh);
6658 }
6659
6660out_commit:
6661 ocfs2_commit_trans(osb, handle);
6662
6663out:
6664 ocfs2_free_alloc_context(meta_ac);
6665 return ret;
6666}
6667
6668struct ocfs2_reflink_xattr_tree_args {
6669 struct ocfs2_xattr_reflink *reflink;
6670 struct buffer_head *old_blk_bh;
6671 struct buffer_head *new_blk_bh;
6672 struct ocfs2_xattr_bucket *old_bucket;
6673 struct ocfs2_xattr_bucket *new_bucket;
6674};
6675
6676/*
6677 * NOTE:
6678 * We have to handle the case that both old bucket and new bucket
6679 * will call this function to get the right ret_bh.
6680 * So The caller must give us the right bh.
6681 */
6682static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb,
6683 struct buffer_head *bh,
6684 struct ocfs2_xattr_header *xh,
6685 int offset,
6686 struct ocfs2_xattr_value_root **xv,
6687 struct buffer_head **ret_bh,
6688 void *para)
6689{
6690 struct ocfs2_reflink_xattr_tree_args *args =
6691 (struct ocfs2_reflink_xattr_tree_args *)para;
6692 struct ocfs2_xattr_bucket *bucket;
6693
6694 if (bh == args->old_bucket->bu_bhs[0])
6695 bucket = args->old_bucket;
6696 else
6697 bucket = args->new_bucket;
6698
6699 return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
6700 xv, ret_bh);
6701}
6702
6703struct ocfs2_value_tree_metas {
6704 int num_metas;
6705 int credits;
6706 int num_recs;
6707};
6708
6709static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb,
6710 struct buffer_head *bh,
6711 struct ocfs2_xattr_header *xh,
6712 int offset,
6713 struct ocfs2_xattr_value_root **xv,
6714 struct buffer_head **ret_bh,
6715 void *para)
6716{
6717 struct ocfs2_xattr_bucket *bucket =
6718 (struct ocfs2_xattr_bucket *)para;
6719
6720 return ocfs2_get_xattr_tree_value_root(sb, bucket, offset,
6721 xv, ret_bh);
6722}
6723
6724static int ocfs2_calc_value_tree_metas(struct inode *inode,
6725 struct ocfs2_xattr_bucket *bucket,
6726 void *para)
6727{
6728 struct ocfs2_value_tree_metas *metas =
6729 (struct ocfs2_value_tree_metas *)para;
6730 struct ocfs2_xattr_header *xh =
6731 (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data;
6732
6733 /* Add the credits for this bucket first. */
6734 metas->credits += bucket->bu_blocks;
6735 return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0],
6736 xh, &metas->num_metas,
6737 &metas->credits, &metas->num_recs,
6738 ocfs2_value_tree_metas_in_bucket,
6739 bucket);
6740}
6741
6742/*
6743 * Given a xattr extent rec starting from blkno and having len clusters,
6744 * iterate all the buckets calculate how much metadata we need for reflinking
6745 * all the ocfs2_xattr_value_root and lock the allocators accordingly.
6746 */
6747static int ocfs2_lock_reflink_xattr_rec_allocators(
6748 struct ocfs2_reflink_xattr_tree_args *args,
6749 struct ocfs2_extent_tree *xt_et,
6750 u64 blkno, u32 len, int *credits,
6751 struct ocfs2_alloc_context **meta_ac,
6752 struct ocfs2_alloc_context **data_ac)
6753{
6754 int ret, num_free_extents;
6755 struct ocfs2_value_tree_metas metas;
6756 struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb);
6757 struct ocfs2_refcount_block *rb;
6758
6759 memset(&metas, 0, sizeof(metas));
6760
6761 ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len,
6762 ocfs2_calc_value_tree_metas, &metas);
6763 if (ret) {
6764 mlog_errno(ret);
6765 goto out;
6766 }
6767
6768 *credits = metas.credits;
6769
6770 /*
6771 * Calculate we need for refcount tree change.
6772 *
6773 * We need to add/modify num_recs in refcount tree, so just calculate
6774 * an approximate number we need for refcount tree change.
6775 * Sometimes we need to split the tree, and after split, half recs
6776 * will be moved to the new block, and a new block can only provide
6777 * half number of recs. So we multiple new blocks by 2.
6778 * In the end, we have to add credits for modifying the already
6779 * existed refcount block.
6780 */
6781 rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data;
6782 metas.num_recs =
6783 (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) /
6784 ocfs2_refcount_recs_per_rb(osb->sb) * 2;
6785 metas.num_metas += metas.num_recs;
6786 *credits += metas.num_recs +
6787 metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS;
6788 if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL)
6789 *credits += le16_to_cpu(rb->rf_list.l_tree_depth) *
6790 le16_to_cpu(rb->rf_list.l_next_free_rec) + 1;
6791 else
6792 *credits += 1;
6793
6794 /* count in the xattr tree change. */
964f14a0 6795 num_free_extents = ocfs2_num_free_extents(xt_et);
2999d12f
TM		 6796 if (num_free_extents < 0) {
6797 ret = num_free_extents;
6798 mlog_errno(ret);
6799 goto out;
6800 }
6801
6802 if (num_free_extents < len)
6803 metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el);
6804
6805 *credits += ocfs2_calc_extend_credits(osb->sb,
06f9da6e 6806 xt_et->et_root_el);
2999d12f
TM		 6807
6808 if (metas.num_metas) {
6809 ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas,
6810 meta_ac);
6811 if (ret) {
6812 mlog_errno(ret);
6813 goto out;
6814 }
6815 }
6816
6817 if (len) {
6818 ret = ocfs2_reserve_clusters(osb, len, data_ac);
6819 if (ret)
6820 mlog_errno(ret);
6821 }
6822out:
6823 if (ret) {
6824 if (*meta_ac) {
6825 ocfs2_free_alloc_context(*meta_ac);
6cae6d31 6826 *meta_ac = NULL;
2999d12f
TM		 6827 }
6828 }
6829
6830 return ret;
6831}
6832
121a39bb 6833static int ocfs2_reflink_xattr_bucket(handle_t *handle,
2999d12f 6834 u64 blkno, u64 new_blkno, u32 clusters,
121a39bb 6835 u32 *cpos, int num_buckets,
2999d12f
TM		 6836 struct ocfs2_alloc_context *meta_ac,
6837 struct ocfs2_alloc_context *data_ac,
6838 struct ocfs2_reflink_xattr_tree_args *args)
6839{
6840 int i, j, ret = 0;
6841 struct super_block *sb = args->reflink->old_inode->i_sb;
2999d12f
TM		 6842 int bpb = args->old_bucket->bu_blocks;
6843 struct ocfs2_xattr_value_buf vb = {
6844 .vb_access = ocfs2_journal_access,
6845 };
6846
6847 for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) {
6848 ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
6849 if (ret) {
6850 mlog_errno(ret);
6851 break;
6852 }
6853
9c339255 6854 ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno, 1);
2999d12f
TM		 6855 if (ret) {
6856 mlog_errno(ret);
6857 break;
6858 }
6859
2999d12f
TM		 6860 ret = ocfs2_xattr_bucket_journal_access(handle,
6861 args->new_bucket,
6862 OCFS2_JOURNAL_ACCESS_CREATE);
6863 if (ret) {
6864 mlog_errno(ret);
6865 break;
6866 }
6867
6868 for (j = 0; j < bpb; j++)
6869 memcpy(bucket_block(args->new_bucket, j),
6870 bucket_block(args->old_bucket, j),
6871 sb->s_blocksize);
6872
121a39bb
TM		 6873 /*
6874 * Record the start cpos so that we can use it to initialize
6875 * our xattr tree we also set the xh_num_bucket for the new
6876 * bucket.
6877 */
6878 if (i == 0) {
6879 *cpos = le32_to_cpu(bucket_xh(args->new_bucket)->
6880 xh_entries[0].xe_name_hash);
6881 bucket_xh(args->new_bucket)->xh_num_buckets =
6882 cpu_to_le16(num_buckets);
6883 }
6884
2999d12f
TM		 6885 ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
6886
6887 ret = ocfs2_reflink_xattr_header(handle, args->reflink,
6888 args->old_bucket->bu_bhs[0],
6889 bucket_xh(args->old_bucket),
6890 args->new_bucket->bu_bhs[0],
6891 bucket_xh(args->new_bucket),
6892 &vb, meta_ac,
6893 ocfs2_get_reflink_xattr_value_root,
6894 args);
6895 if (ret) {
6896 mlog_errno(ret);
6897 break;
6898 }
6899
6900 /*
6901 * Re-access and dirty the bucket to calculate metaecc.
6902 * Because we may extend the transaction in reflink_xattr_header
6903 * which will let the already accessed block gone.
6904 */
6905 ret = ocfs2_xattr_bucket_journal_access(handle,
6906 args->new_bucket,
6907 OCFS2_JOURNAL_ACCESS_WRITE);
6908 if (ret) {
6909 mlog_errno(ret);
6910 break;
6911 }
6912
6913 ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket);
121a39bb 6914
2999d12f
TM		 6915 ocfs2_xattr_bucket_relse(args->old_bucket);
6916 ocfs2_xattr_bucket_relse(args->new_bucket);
6917 }
6918
6919 ocfs2_xattr_bucket_relse(args->old_bucket);
6920 ocfs2_xattr_bucket_relse(args->new_bucket);
6921 return ret;
6922}
121a39bb
TM		 6923
6924static int ocfs2_reflink_xattr_buckets(handle_t *handle,
6925 struct inode *inode,
6926 struct ocfs2_reflink_xattr_tree_args *args,
6927 struct ocfs2_extent_tree *et,
6928 struct ocfs2_alloc_context *meta_ac,
6929 struct ocfs2_alloc_context *data_ac,
6930 u64 blkno, u32 cpos, u32 len)
6931{
6932 int ret, first_inserted = 0;
6933 u32 p_cluster, num_clusters, reflink_cpos = 0;
6934 u64 new_blkno;
6935 unsigned int num_buckets, reflink_buckets;
6936 unsigned int bpc =
6937 ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb));
6938
6939 ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno);
6940 if (ret) {
6941 mlog_errno(ret);
6942 goto out;
6943 }
6944 num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets);
6945 ocfs2_xattr_bucket_relse(args->old_bucket);
6946
6947 while (len && num_buckets) {
6948 ret = ocfs2_claim_clusters(handle, data_ac,
6949 1, &p_cluster, &num_clusters);
6950 if (ret) {
6951 mlog_errno(ret);
6952 goto out;
6953 }
6954
6955 new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster);
6956 reflink_buckets = min(num_buckets, bpc * num_clusters);
6957
6958 ret = ocfs2_reflink_xattr_bucket(handle, blkno,
6959 new_blkno, num_clusters,
6960 &reflink_cpos, reflink_buckets,
6961 meta_ac, data_ac, args);
6962 if (ret) {
6963 mlog_errno(ret);
6964 goto out;
6965 }
6966
6967 /*
6968 * For the 1st allocated cluster, we make it use the same cpos
6969 * so that the xattr tree looks the same as the original one
6970 * in the most case.
6971 */
6972 if (!first_inserted) {
6973 reflink_cpos = cpos;
6974 first_inserted = 1;
6975 }
6976 ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno,
6977 num_clusters, 0, meta_ac);
6978 if (ret)
6979 mlog_errno(ret);
6980
402b4183
TM		 6981 trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno,
6982 num_clusters, reflink_cpos);
121a39bb
TM		 6983
6984 len -= num_clusters;
6985 blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters);
6986 num_buckets -= reflink_buckets;
6987 }
6988out:
6989 return ret;
6990}
6991
2999d12f
TM		 6992/*
6993 * Create the same xattr extent record in the new inode's xattr tree.
6994 */
6995static int ocfs2_reflink_xattr_rec(struct inode *inode,
6996 struct buffer_head *root_bh,
6997 u64 blkno,
6998 u32 cpos,
6999 u32 len,
7000 void *para)
7001{
7002 int ret, credits = 0;
2999d12f
TM		 7003 handle_t *handle;
7004 struct ocfs2_reflink_xattr_tree_args *args =
7005 (struct ocfs2_reflink_xattr_tree_args *)para;
7006 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
7007 struct ocfs2_alloc_context *meta_ac = NULL;
7008 struct ocfs2_alloc_context *data_ac = NULL;
7009 struct ocfs2_extent_tree et;
7010
402b4183 7011 trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len);
121a39bb 7012
2999d12f
TM		 7013 ocfs2_init_xattr_tree_extent_tree(&et,
7014 INODE_CACHE(args->reflink->new_inode),
7015 args->new_blk_bh);
7016
7017 ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno,
7018 len, &credits,
7019 &meta_ac, &data_ac);
7020 if (ret) {
7021 mlog_errno(ret);
7022 goto out;
7023 }
7024
7025 handle = ocfs2_start_trans(osb, credits);
7026 if (IS_ERR(handle)) {
7027 ret = PTR_ERR(handle);
7028 mlog_errno(ret);
7029 goto out;
7030 }
7031
121a39bb
TM		 7032 ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et,
7033 meta_ac, data_ac,
7034 blkno, cpos, len);
2999d12f
TM		 7035 if (ret)
7036 mlog_errno(ret);
7037
2999d12f
TM		 7038 ocfs2_commit_trans(osb, handle);
7039
7040out:
7041 if (meta_ac)
7042 ocfs2_free_alloc_context(meta_ac);
7043 if (data_ac)
7044 ocfs2_free_alloc_context(data_ac);
7045 return ret;
7046}
7047
7048/*
7049 * Create reflinked xattr buckets.
7050 * We will add bucket one by one, and refcount all the xattrs in the bucket
7051 * if they are stored outside.
7052 */
7053static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args,
7054 struct buffer_head *blk_bh,
7055 struct buffer_head *new_blk_bh)
7056{
7057 int ret;
7058 struct ocfs2_reflink_xattr_tree_args para;
7059
7060 memset(&para, 0, sizeof(para));
7061 para.reflink = args;
7062 para.old_blk_bh = blk_bh;
7063 para.new_blk_bh = new_blk_bh;
7064
7065 para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode);
7066 if (!para.old_bucket) {
7067 mlog_errno(-ENOMEM);
7068 return -ENOMEM;
7069 }
7070
7071 para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode);
7072 if (!para.new_bucket) {
7073 ret = -ENOMEM;
7074 mlog_errno(ret);
7075 goto out;
7076 }
7077
7078 ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh,
7079 ocfs2_reflink_xattr_rec,
7080 &para);
7081 if (ret)
7082 mlog_errno(ret);
7083
7084out:
7085 ocfs2_xattr_bucket_free(para.old_bucket);
7086 ocfs2_xattr_bucket_free(para.new_bucket);
7087 return ret;
7088}
7089
7090static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args,
7091 struct buffer_head *blk_bh)
7092{
7093 int ret, indexed = 0;
7094 struct buffer_head *new_blk_bh = NULL;
7095 struct ocfs2_xattr_block *xb =
7096 (struct ocfs2_xattr_block *)blk_bh->b_data;
7097
7098
7099 if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)
7100 indexed = 1;
7101
7102 ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh,
7103 &new_blk_bh, indexed);
7104 if (ret) {
7105 mlog_errno(ret);
7106 goto out;
7107 }
7108
2decd65a 7109 if (!indexed)
2999d12f
TM		 7110 ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh);
7111 else
7112 ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh);
7113 if (ret)
7114 mlog_errno(ret);
7115
7116out:
7117 brelse(new_blk_bh);
7118 return ret;
7119}
7120
0fe9b66c
TM		 7121static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe)
7122{
7123 int type = ocfs2_xattr_get_type(xe);
7124
7125 return type != OCFS2_XATTR_INDEX_SECURITY &&
7126 type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS &&
7127 type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT;
7128}
7129
2999d12f
TM		 7130int ocfs2_reflink_xattrs(struct inode *old_inode,
7131 struct buffer_head *old_bh,
7132 struct inode *new_inode,
0fe9b66c
TM		 7133 struct buffer_head *new_bh,
7134 bool preserve_security)
2999d12f
TM		 7135{
7136 int ret;
7137 struct ocfs2_xattr_reflink args;
7138 struct ocfs2_inode_info *oi = OCFS2_I(old_inode);
7139 struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data;
7140 struct buffer_head *blk_bh = NULL;
7141 struct ocfs2_cached_dealloc_ctxt dealloc;
7142 struct ocfs2_refcount_tree *ref_tree;
7143 struct buffer_head *ref_root_bh = NULL;
7144
7145 ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb),
7146 le64_to_cpu(di->i_refcount_loc),
7147 1, &ref_tree, &ref_root_bh);
7148 if (ret) {
7149 mlog_errno(ret);
7150 goto out;
7151 }
7152
7153 ocfs2_init_dealloc_ctxt(&dealloc);
7154
7155 args.old_inode = old_inode;
7156 args.new_inode = new_inode;
7157 args.old_bh = old_bh;
7158 args.new_bh = new_bh;
7159 args.ref_ci = &ref_tree->rf_ci;
7160 args.ref_root_bh = ref_root_bh;
7161 args.dealloc = &dealloc;
0fe9b66c
TM		 7162 if (preserve_security)
7163 args.xattr_reflinked = NULL;
7164 else
7165 args.xattr_reflinked = ocfs2_reflink_xattr_no_security;
2999d12f
TM		 7166
7167 if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) {
7168 ret = ocfs2_reflink_xattr_inline(&args);
7169 if (ret) {
7170 mlog_errno(ret);
7171 goto out_unlock;
7172 }
7173 }
7174
7175 if (!di->i_xattr_loc)
7176 goto out_unlock;
7177
7178 ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc),
7179 &blk_bh);
7180 if (ret < 0) {
7181 mlog_errno(ret);
7182 goto out_unlock;
7183 }
7184
7185 ret = ocfs2_reflink_xattr_in_block(&args, blk_bh);
7186 if (ret)
7187 mlog_errno(ret);
7188
7189 brelse(blk_bh);
7190
7191out_unlock:
7192 ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb),
7193 ref_tree, 1);
7194 brelse(ref_root_bh);
7195
7196 if (ocfs2_dealloc_has_cluster(&dealloc)) {
7197 ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1);
7198 ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc);
7199 }
7200
7201out:
7202 return ret;
7203}
7204
0fe9b66c
TM		 7205/*
7206 * Initialize security and acl for a already created inode.
7207 * Used for reflink a non-preserve-security file.
7208 *
7209 * It uses common api like ocfs2_xattr_set, so the caller
7210 * must not hold any lock expect i_mutex.
7211 */
7212int ocfs2_init_security_and_acl(struct inode *dir,
2a7dba39 7213 struct inode *inode,
c25a1e06 7214 const struct qstr *qstr)
0fe9b66c 7215{
702e5bc6 7216 int ret = 0;
c25a1e06 7217 struct buffer_head *dir_bh = NULL;
0fe9b66c 7218
9d8f13ba 7219 ret = ocfs2_init_security_get(inode, dir, qstr, NULL);
32918dd9 7220 if (ret) {
0fe9b66c
TM		 7221 mlog_errno(ret);
7222 goto leave;
7223 }
7224
7225 ret = ocfs2_inode_lock(dir, &dir_bh, 0);
7226 if (ret) {
7227 mlog_errno(ret);
7228 goto leave;
7229 }
c25a1e06
JB		 7230 ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL);
7231 if (ret)
7232 mlog_errno(ret);
0fe9b66c
TM		 7233
7234 ocfs2_inode_unlock(dir, 0);
7235 brelse(dir_bh);
7236leave:
7237 return ret;
7238}
1046cb11 7239
923f7f31
TY		 7240/*
7241 * 'security' attributes support
7242 */
d9a82a04 7243static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
b296821a
AV		 7244 struct dentry *unused, struct inode *inode,
7245 const char *name, void *buffer, size_t size)
923f7f31 7246{
b296821a 7247 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY,
431547b3 7248 name, buffer, size);
923f7f31
TY		 7249}
7250
d9a82a04 7251static int ocfs2_xattr_security_set(const struct xattr_handler *handler,
59301226
AV		 7252 struct dentry *unused, struct inode *inode,
7253 const char *name, const void *value,
7254 size_t size, int flags)
923f7f31 7255{
59301226 7256 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY,
431547b3 7257 name, value, size, flags);
923f7f31
TY		 7258}
7259
b519ea6d 7260static int ocfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
9d8f13ba
MZ		 7261 void *fs_info)
7262{
7263 const struct xattr *xattr;
7264 int err = 0;
7265
7266 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
7267 err = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY,
7268 xattr->name, xattr->value,
7269 xattr->value_len, XATTR_CREATE);
7270 if (err)
7271 break;
7272 }
7273 return err;
7274}
7275
534eaddd
TY		 7276int ocfs2_init_security_get(struct inode *inode,
7277 struct inode *dir,
2a7dba39 7278 const struct qstr *qstr,
534eaddd
TY		 7279 struct ocfs2_security_xattr_info *si)
7280{
38d59ef6
TY		 7281 /* check whether ocfs2 support feature xattr */
7282 if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb)))
7283 return -EOPNOTSUPP;
9d8f13ba
MZ		 7284 if (si)
7285 return security_old_inode_init_security(inode, dir, qstr,
7286 &si->name, &si->value,
7287 &si->value_len);
7288
7289 return security_inode_init_security(inode, dir, qstr,
7290 &ocfs2_initxattrs, NULL);
534eaddd
TY		 7291}
7292
7293int ocfs2_init_security_set(handle_t *handle,
7294 struct inode *inode,
7295 struct buffer_head *di_bh,
7296 struct ocfs2_security_xattr_info *si,
7297 struct ocfs2_alloc_context *xattr_ac,
7298 struct ocfs2_alloc_context *data_ac)
7299{
7300 return ocfs2_xattr_set_handle(handle, inode, di_bh,
7301 OCFS2_XATTR_INDEX_SECURITY,
7302 si->name, si->value, si->value_len, 0,
7303 xattr_ac, data_ac);
7304}
7305
537d81ca 7306const struct xattr_handler ocfs2_xattr_security_handler = {
923f7f31 7307 .prefix = XATTR_SECURITY_PREFIX,
923f7f31
TY		 7308 .get = ocfs2_xattr_security_get,
7309 .set = ocfs2_xattr_security_set,
7310};
7311
99219aea
MF		 7312/*
7313 * 'trusted' attributes support
7314 */
d9a82a04 7315static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
b296821a
AV		 7316 struct dentry *unused, struct inode *inode,
7317 const char *name, void *buffer, size_t size)
99219aea 7318{
b296821a 7319 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED,
431547b3 7320 name, buffer, size);
99219aea
MF		 7321}
7322
d9a82a04 7323static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler,
59301226
AV		 7324 struct dentry *unused, struct inode *inode,
7325 const char *name, const void *value,
7326 size_t size, int flags)
99219aea 7327{
59301226 7328 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED,
431547b3 7329 name, value, size, flags);
99219aea
MF		 7330}
7331
537d81ca 7332const struct xattr_handler ocfs2_xattr_trusted_handler = {
99219aea 7333 .prefix = XATTR_TRUSTED_PREFIX,
99219aea
MF		 7334 .get = ocfs2_xattr_trusted_get,
7335 .set = ocfs2_xattr_trusted_set,
7336};
7337
99219aea
MF		 7338/*
7339 * 'user' attributes support
7340 */
d9a82a04 7341static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
84d86e6d 7342 struct dentry *unused, struct inode *inode,
b296821a 7343 const char *name, void *buffer, size_t size)
99219aea 7344{
b296821a 7345 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
99219aea 7346
99219aea
MF		 7347 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
7348 return -EOPNOTSUPP;
b296821a 7349 return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
99219aea
MF		 7350 buffer, size);
7351}
7352
d9a82a04 7353static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
59301226
AV		 7354 struct dentry *unused, struct inode *inode,
7355 const char *name, const void *value,
7356 size_t size, int flags)
99219aea 7357{
59301226 7358 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
99219aea 7359
99219aea
MF		 7360 if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
7361 return -EOPNOTSUPP;
7362
59301226 7363 return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER,
431547b3 7364 name, value, size, flags);
99219aea
MF		 7365}
7366
537d81ca 7367const struct xattr_handler ocfs2_xattr_user_handler = {
99219aea 7368 .prefix = XATTR_USER_PREFIX,
99219aea
MF		 7369 .get = ocfs2_xattr_user_get,
7370 .set = ocfs2_xattr_user_set,
7371};
Linux 6.x block layer and io_uring tree(s)