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f56654c4 TM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * xattr.c | |
5 | * | |
c3cb6827 | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 7 | * |
cf1d6c76 | 8 | * CREDITS: |
c3cb6827 TY |
9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
cf1d6c76 | 11 | * |
f56654c4 TM |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public | |
c3cb6827 | 14 | * License version 2 as published by the Free Software Foundation. |
f56654c4 TM |
15 | * |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
f56654c4 TM |
20 | */ |
21 | ||
cf1d6c76 TY |
22 | #include <linux/capability.h> |
23 | #include <linux/fs.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/pagemap.h> | |
28 | #include <linux/uio.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/splice.h> | |
31 | #include <linux/mount.h> | |
32 | #include <linux/writeback.h> | |
33 | #include <linux/falloc.h> | |
01225596 | 34 | #include <linux/sort.h> |
99219aea MF |
35 | #include <linux/init.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
923f7f31 | 38 | #include <linux/security.h> |
cf1d6c76 | 39 | |
f56654c4 TM |
40 | #define MLOG_MASK_PREFIX ML_XATTR |
41 | #include <cluster/masklog.h> | |
42 | ||
43 | #include "ocfs2.h" | |
44 | #include "alloc.h" | |
d6b32bbb | 45 | #include "blockcheck.h" |
f56654c4 TM |
46 | #include "dlmglue.h" |
47 | #include "file.h" | |
cf1d6c76 TY |
48 | #include "symlink.h" |
49 | #include "sysfile.h" | |
f56654c4 TM |
50 | #include "inode.h" |
51 | #include "journal.h" | |
52 | #include "ocfs2_fs.h" | |
53 | #include "suballoc.h" | |
54 | #include "uptodate.h" | |
55 | #include "buffer_head_io.h" | |
0c044f0b | 56 | #include "super.h" |
cf1d6c76 | 57 | #include "xattr.h" |
492a8a33 | 58 | #include "refcounttree.h" |
cf1d6c76 TY |
59 | |
60 | struct ocfs2_xattr_def_value_root { | |
61 | struct ocfs2_xattr_value_root xv; | |
62 | struct ocfs2_extent_rec er; | |
63 | }; | |
64 | ||
0c044f0b | 65 | struct ocfs2_xattr_bucket { |
ba937127 JB |
66 | /* The inode these xattrs are associated with */ |
67 | struct inode *bu_inode; | |
68 | ||
69 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 70 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
71 | |
72 | /* How many blocks make up one bucket for this filesystem */ | |
73 | int bu_blocks; | |
0c044f0b TM |
74 | }; |
75 | ||
78f30c31 | 76 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 77 | handle_t *handle; |
78f30c31 TM |
78 | struct ocfs2_alloc_context *meta_ac; |
79 | struct ocfs2_alloc_context *data_ac; | |
80 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
81 | }; | |
82 | ||
cf1d6c76 TY |
83 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
84 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 85 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
86 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
87 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 88 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
89 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
90 | - sizeof(struct ocfs2_xattr_block) \ | |
91 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 92 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
93 | |
94 | static struct ocfs2_xattr_def_value_root def_xv = { | |
95 | .xv.xr_list.l_count = cpu_to_le16(1), | |
96 | }; | |
97 | ||
98 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
99 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
100 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
101 | &ocfs2_xattr_acl_access_handler, | |
102 | &ocfs2_xattr_acl_default_handler, | |
103 | #endif | |
cf1d6c76 | 104 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 105 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
106 | NULL |
107 | }; | |
108 | ||
c988fd04 | 109 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
111 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
112 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] | |
113 | = &ocfs2_xattr_acl_access_handler, | |
114 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
115 | = &ocfs2_xattr_acl_default_handler, | |
116 | #endif | |
cf1d6c76 | 117 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 118 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
119 | }; |
120 | ||
121 | struct ocfs2_xattr_info { | |
122 | int name_index; | |
123 | const char *name; | |
124 | const void *value; | |
125 | size_t value_len; | |
126 | }; | |
127 | ||
128 | struct ocfs2_xattr_search { | |
129 | struct buffer_head *inode_bh; | |
130 | /* | |
131 | * xattr_bh point to the block buffer head which has extended attribute | |
132 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
133 | */ | |
134 | struct buffer_head *xattr_bh; | |
135 | struct ocfs2_xattr_header *header; | |
ba937127 | 136 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
137 | void *base; |
138 | void *end; | |
139 | struct ocfs2_xattr_entry *here; | |
140 | int not_found; | |
141 | }; | |
142 | ||
fd68a894 | 143 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
144 | struct ocfs2_xattr_header *xh, |
145 | int index, | |
146 | int *block_off, | |
147 | int *new_offset); | |
148 | ||
54f443f4 JB |
149 | static int ocfs2_xattr_block_find(struct inode *inode, |
150 | int name_index, | |
151 | const char *name, | |
152 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
153 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
154 | struct buffer_head *root_bh, | |
155 | int name_index, | |
156 | const char *name, | |
157 | struct ocfs2_xattr_search *xs); | |
158 | ||
0c044f0b | 159 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 160 | struct buffer_head *blk_bh, |
0c044f0b TM |
161 | char *buffer, |
162 | size_t buffer_size); | |
163 | ||
01225596 | 164 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
165 | struct ocfs2_xattr_search *xs, |
166 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
167 | |
168 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
169 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
170 | struct ocfs2_xattr_search *xs, |
171 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 172 | |
47bca495 TM |
173 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
174 | struct buffer_head *root_bh, | |
175 | u64 blkno, u32 cpos, u32 len, void *para); | |
176 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
177 | struct buffer_head *root_bh, | |
178 | xattr_tree_rec_func *rec_func, | |
179 | void *para); | |
180 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
181 | struct ocfs2_xattr_bucket *bucket, | |
182 | void *para); | |
183 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
184 | struct buffer_head *root_bh, | |
185 | u64 blkno, | |
186 | u32 cpos, | |
187 | u32 len, | |
188 | void *para); | |
189 | ||
c58b6032 JB |
190 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
191 | u64 src_blk, u64 last_blk, u64 to_blk, | |
192 | unsigned int start_bucket, | |
193 | u32 *first_hash); | |
492a8a33 TM |
194 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
195 | struct ocfs2_dinode *di, | |
196 | struct ocfs2_xattr_info *xi, | |
197 | struct ocfs2_xattr_search *xis, | |
198 | struct ocfs2_xattr_search *xbs, | |
199 | struct ocfs2_refcount_tree **ref_tree, | |
200 | int *meta_need, | |
201 | int *credits); | |
a3944256 | 202 | |
0030e001 TY |
203 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
204 | { | |
205 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
206 | } | |
207 | ||
208 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
209 | { | |
210 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
211 | } | |
212 | ||
213 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
214 | { | |
215 | u16 len = sb->s_blocksize - | |
216 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
217 | ||
218 | return len / sizeof(struct ocfs2_xattr_entry); | |
219 | } | |
220 | ||
9c7759aa | 221 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 222 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 223 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 224 | |
ba937127 | 225 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 226 | { |
ba937127 JB |
227 | struct ocfs2_xattr_bucket *bucket; |
228 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 229 | |
ba937127 JB |
230 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
231 | ||
232 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
233 | if (bucket) { | |
234 | bucket->bu_inode = inode; | |
235 | bucket->bu_blocks = blks; | |
236 | } | |
237 | ||
238 | return bucket; | |
239 | } | |
240 | ||
241 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
242 | { | |
243 | int i; | |
244 | ||
245 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
246 | brelse(bucket->bu_bhs[i]); |
247 | bucket->bu_bhs[i] = NULL; | |
248 | } | |
249 | } | |
250 | ||
ba937127 JB |
251 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
252 | { | |
253 | if (bucket) { | |
254 | ocfs2_xattr_bucket_relse(bucket); | |
255 | bucket->bu_inode = NULL; | |
256 | kfree(bucket); | |
257 | } | |
258 | } | |
259 | ||
784b816a JB |
260 | /* |
261 | * A bucket that has never been written to disk doesn't need to be | |
262 | * read. We just need the buffer_heads. Don't call this for | |
263 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
264 | * them fully. | |
265 | */ | |
ba937127 | 266 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
267 | u64 xb_blkno) |
268 | { | |
269 | int i, rc = 0; | |
784b816a | 270 | |
ba937127 JB |
271 | for (i = 0; i < bucket->bu_blocks; i++) { |
272 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
273 | xb_blkno + i); | |
784b816a JB |
274 | if (!bucket->bu_bhs[i]) { |
275 | rc = -EIO; | |
276 | mlog_errno(rc); | |
277 | break; | |
278 | } | |
279 | ||
8cb471e8 | 280 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 281 | bucket->bu_bhs[i])) |
8cb471e8 | 282 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 283 | bucket->bu_bhs[i]); |
784b816a JB |
284 | } |
285 | ||
286 | if (rc) | |
ba937127 | 287 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
288 | return rc; |
289 | } | |
290 | ||
291 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 292 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
293 | u64 xb_blkno) |
294 | { | |
ba937127 | 295 | int rc; |
784b816a | 296 | |
8cb471e8 | 297 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
298 | bucket->bu_blocks, bucket->bu_bhs, 0, |
299 | NULL); | |
4d0e214e | 300 | if (!rc) { |
c8b9cf9a | 301 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
302 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
303 | bucket->bu_bhs, | |
304 | bucket->bu_blocks, | |
305 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 306 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
307 | if (rc) |
308 | mlog_errno(rc); | |
309 | } | |
310 | ||
784b816a | 311 | if (rc) |
ba937127 | 312 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
313 | return rc; |
314 | } | |
315 | ||
1224be02 | 316 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
317 | struct ocfs2_xattr_bucket *bucket, |
318 | int type) | |
319 | { | |
320 | int i, rc = 0; | |
1224be02 | 321 | |
ba937127 | 322 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
323 | rc = ocfs2_journal_access(handle, |
324 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
325 | bucket->bu_bhs[i], type); |
326 | if (rc) { | |
327 | mlog_errno(rc); | |
328 | break; | |
329 | } | |
330 | } | |
331 | ||
332 | return rc; | |
333 | } | |
334 | ||
335 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
336 | struct ocfs2_xattr_bucket *bucket) |
337 | { | |
ba937127 | 338 | int i; |
1224be02 | 339 | |
c8b9cf9a | 340 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
341 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
342 | bucket->bu_bhs, bucket->bu_blocks, | |
343 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 344 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 345 | |
ba937127 | 346 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
347 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
348 | } | |
349 | ||
ba937127 | 350 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
351 | struct ocfs2_xattr_bucket *src) |
352 | { | |
353 | int i; | |
ba937127 JB |
354 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
355 | ||
356 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
357 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 358 | |
ba937127 | 359 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
360 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
361 | blocksize); | |
362 | } | |
363 | } | |
1224be02 | 364 | |
4ae1d69b JB |
365 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
366 | struct buffer_head *bh) | |
367 | { | |
d6b32bbb | 368 | int rc; |
4ae1d69b JB |
369 | struct ocfs2_xattr_block *xb = |
370 | (struct ocfs2_xattr_block *)bh->b_data; | |
371 | ||
372 | mlog(0, "Validating xattr block %llu\n", | |
373 | (unsigned long long)bh->b_blocknr); | |
374 | ||
d6b32bbb JB |
375 | BUG_ON(!buffer_uptodate(bh)); |
376 | ||
377 | /* | |
378 | * If the ecc fails, we return the error but otherwise | |
379 | * leave the filesystem running. We know any error is | |
380 | * local to this block. | |
381 | */ | |
382 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
383 | if (rc) | |
384 | return rc; | |
385 | ||
386 | /* | |
387 | * Errors after here are fatal | |
388 | */ | |
389 | ||
4ae1d69b JB |
390 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
391 | ocfs2_error(sb, | |
392 | "Extended attribute block #%llu has bad " | |
393 | "signature %.*s", | |
394 | (unsigned long long)bh->b_blocknr, 7, | |
395 | xb->xb_signature); | |
396 | return -EINVAL; | |
397 | } | |
398 | ||
399 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
400 | ocfs2_error(sb, | |
401 | "Extended attribute block #%llu has an " | |
402 | "invalid xb_blkno of %llu", | |
403 | (unsigned long long)bh->b_blocknr, | |
404 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
405 | return -EINVAL; | |
406 | } | |
407 | ||
408 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
409 | ocfs2_error(sb, | |
410 | "Extended attribute block #%llu has an invalid " | |
411 | "xb_fs_generation of #%u", | |
412 | (unsigned long long)bh->b_blocknr, | |
413 | le32_to_cpu(xb->xb_fs_generation)); | |
414 | return -EINVAL; | |
415 | } | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
421 | struct buffer_head **bh) | |
422 | { | |
423 | int rc; | |
424 | struct buffer_head *tmp = *bh; | |
425 | ||
8cb471e8 | 426 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 427 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
428 | |
429 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
430 | if (!rc && !*bh) | |
431 | *bh = tmp; | |
432 | ||
433 | return rc; | |
434 | } | |
435 | ||
936b8834 | 436 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
437 | { |
438 | struct xattr_handler *handler = NULL; | |
439 | ||
440 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
441 | handler = ocfs2_xattr_handler_map[name_index]; | |
442 | ||
936b8834 | 443 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
444 | } |
445 | ||
40daa16a | 446 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 447 | const char *name, |
40daa16a | 448 | int name_len) |
cf1d6c76 TY |
449 | { |
450 | /* Get hash value of uuid from super block */ | |
451 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
452 | int i; | |
453 | ||
cf1d6c76 TY |
454 | /* hash extended attribute name */ |
455 | for (i = 0; i < name_len; i++) { | |
456 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
457 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
458 | *name++; | |
459 | } | |
460 | ||
461 | return hash; | |
462 | } | |
463 | ||
464 | /* | |
465 | * ocfs2_xattr_hash_entry() | |
466 | * | |
467 | * Compute the hash of an extended attribute. | |
468 | */ | |
469 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
470 | struct ocfs2_xattr_header *header, | |
471 | struct ocfs2_xattr_entry *entry) | |
472 | { | |
473 | u32 hash = 0; | |
cf1d6c76 | 474 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 475 | |
2057e5c6 | 476 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
477 | entry->xe_name_hash = cpu_to_le32(hash); |
478 | ||
479 | return; | |
480 | } | |
f56654c4 | 481 | |
534eaddd TY |
482 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
483 | { | |
484 | int size = 0; | |
485 | ||
486 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
487 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
488 | else | |
489 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
490 | size += sizeof(struct ocfs2_xattr_entry); | |
491 | ||
492 | return size; | |
493 | } | |
494 | ||
495 | int ocfs2_calc_security_init(struct inode *dir, | |
496 | struct ocfs2_security_xattr_info *si, | |
497 | int *want_clusters, | |
498 | int *xattr_credits, | |
499 | struct ocfs2_alloc_context **xattr_ac) | |
500 | { | |
501 | int ret = 0; | |
502 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
503 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
504 | si->value_len); | |
505 | ||
506 | /* | |
507 | * The max space of security xattr taken inline is | |
508 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
509 | * So reserve one metadata block for it is ok. | |
510 | */ | |
511 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
512 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
513 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
514 | if (ret) { | |
515 | mlog_errno(ret); | |
516 | return ret; | |
517 | } | |
518 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
519 | } | |
520 | ||
521 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
522 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
523 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
524 | si->value_len); | |
525 | ||
526 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
527 | new_clusters); | |
528 | *want_clusters += new_clusters; | |
529 | } | |
534eaddd TY |
530 | return ret; |
531 | } | |
532 | ||
89c38bd0 TY |
533 | int ocfs2_calc_xattr_init(struct inode *dir, |
534 | struct buffer_head *dir_bh, | |
535 | int mode, | |
536 | struct ocfs2_security_xattr_info *si, | |
537 | int *want_clusters, | |
538 | int *xattr_credits, | |
9b7895ef | 539 | int *want_meta) |
89c38bd0 TY |
540 | { |
541 | int ret = 0; | |
542 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 543 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
544 | |
545 | if (si->enable) | |
546 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
547 | si->value_len); | |
548 | ||
549 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
550 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
551 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
552 | "", NULL, 0); | |
553 | if (acl_len > 0) { | |
554 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
555 | if (S_ISDIR(mode)) | |
556 | a_size <<= 1; | |
557 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
558 | mlog_errno(ret); | |
559 | return ret; | |
560 | } | |
561 | } | |
562 | ||
563 | if (!(s_size + a_size)) | |
564 | return ret; | |
565 | ||
566 | /* | |
567 | * The max space of security xattr taken inline is | |
568 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
569 | * The max space of acl xattr taken inline is | |
570 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
571 | * when blocksize = 512, may reserve one more cluser for | |
572 | * xattr bucket, otherwise reserve one metadata block | |
573 | * for them is ok. | |
6c9fd1dc TY |
574 | * If this is a new directory with inline data, |
575 | * we choose to reserve the entire inline area for | |
576 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
577 | */ |
578 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 579 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 580 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 581 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
582 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
583 | } | |
584 | ||
585 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
586 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
587 | *want_clusters += 1; | |
588 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
589 | } | |
590 | ||
0e445b6f TY |
591 | /* |
592 | * reserve credits and clusters for xattrs which has large value | |
593 | * and have to be set outside | |
594 | */ | |
595 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
596 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
597 | si->value_len); | |
598 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
599 | new_clusters); | |
600 | *want_clusters += new_clusters; | |
601 | } | |
89c38bd0 TY |
602 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
603 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
604 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
605 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
606 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
607 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
608 | new_clusters); | |
609 | *want_clusters += new_clusters; | |
89c38bd0 TY |
610 | } |
611 | ||
612 | return ret; | |
613 | } | |
614 | ||
f56654c4 TM |
615 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
616 | u32 clusters_to_add, | |
19b801f4 | 617 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 618 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
619 | { |
620 | int status = 0; | |
85db90e7 | 621 | handle_t *handle = ctxt->handle; |
f56654c4 | 622 | enum ocfs2_alloc_restarted why; |
19b801f4 | 623 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 624 | struct ocfs2_extent_tree et; |
f56654c4 TM |
625 | |
626 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
627 | ||
5e404e9e | 628 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 629 | |
0cf2f763 | 630 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 631 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
632 | if (status < 0) { |
633 | mlog_errno(status); | |
634 | goto leave; | |
635 | } | |
636 | ||
19b801f4 | 637 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
cbee7e1a JB |
638 | status = ocfs2_add_clusters_in_btree(handle, |
639 | &et, | |
f56654c4 TM |
640 | &logical_start, |
641 | clusters_to_add, | |
642 | 0, | |
78f30c31 TM |
643 | ctxt->data_ac, |
644 | ctxt->meta_ac, | |
f99b9b7c | 645 | &why); |
85db90e7 TM |
646 | if (status < 0) { |
647 | mlog_errno(status); | |
f56654c4 TM |
648 | goto leave; |
649 | } | |
650 | ||
19b801f4 | 651 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
652 | if (status < 0) { |
653 | mlog_errno(status); | |
654 | goto leave; | |
655 | } | |
656 | ||
19b801f4 | 657 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 658 | |
85db90e7 TM |
659 | /* |
660 | * We should have already allocated enough space before the transaction, | |
661 | * so no need to restart. | |
662 | */ | |
663 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
664 | |
665 | leave: | |
f56654c4 TM |
666 | |
667 | return status; | |
668 | } | |
669 | ||
670 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 671 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 672 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 673 | unsigned int ext_flags, |
78f30c31 | 674 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
675 | { |
676 | int ret; | |
677 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 678 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
679 | struct ocfs2_extent_tree et; |
680 | ||
5e404e9e | 681 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 682 | |
0cf2f763 | 683 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 684 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
685 | if (ret) { |
686 | mlog_errno(ret); | |
85db90e7 | 687 | goto out; |
f56654c4 TM |
688 | } |
689 | ||
dbdcf6a4 | 690 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 691 | &ctxt->dealloc); |
f56654c4 TM |
692 | if (ret) { |
693 | mlog_errno(ret); | |
85db90e7 | 694 | goto out; |
f56654c4 TM |
695 | } |
696 | ||
d72cc72d | 697 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 698 | |
d72cc72d | 699 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
700 | if (ret) { |
701 | mlog_errno(ret); | |
85db90e7 | 702 | goto out; |
f56654c4 TM |
703 | } |
704 | ||
492a8a33 TM |
705 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
706 | ret = ocfs2_decrease_refcount(inode, handle, | |
707 | ocfs2_blocks_to_clusters(inode->i_sb, | |
708 | phys_blkno), | |
709 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
710 | else | |
711 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
712 | phys_blkno, len); | |
f56654c4 TM |
713 | if (ret) |
714 | mlog_errno(ret); | |
715 | ||
f56654c4 | 716 | out: |
f56654c4 TM |
717 | return ret; |
718 | } | |
719 | ||
720 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
721 | u32 old_clusters, | |
722 | u32 new_clusters, | |
19b801f4 | 723 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 724 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
725 | { |
726 | int ret = 0; | |
492a8a33 | 727 | unsigned int ext_flags; |
f56654c4 TM |
728 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
729 | u64 block; | |
f56654c4 TM |
730 | |
731 | if (old_clusters <= new_clusters) | |
732 | return 0; | |
733 | ||
734 | cpos = new_clusters; | |
735 | trunc_len = old_clusters - new_clusters; | |
736 | while (trunc_len) { | |
737 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 738 | &alloc_size, |
492a8a33 | 739 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
740 | if (ret) { |
741 | mlog_errno(ret); | |
742 | goto out; | |
743 | } | |
744 | ||
745 | if (alloc_size > trunc_len) | |
746 | alloc_size = trunc_len; | |
747 | ||
19b801f4 | 748 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 749 | phys_cpos, alloc_size, |
492a8a33 | 750 | ext_flags, ctxt); |
f56654c4 TM |
751 | if (ret) { |
752 | mlog_errno(ret); | |
753 | goto out; | |
754 | } | |
755 | ||
756 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
757 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
758 | block, alloc_size); | |
f56654c4 TM |
759 | cpos += alloc_size; |
760 | trunc_len -= alloc_size; | |
761 | } | |
762 | ||
763 | out: | |
f56654c4 TM |
764 | return ret; |
765 | } | |
766 | ||
767 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 768 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
769 | int len, |
770 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
771 | { |
772 | int ret; | |
773 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 774 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
775 | |
776 | if (new_clusters == old_clusters) | |
777 | return 0; | |
778 | ||
779 | if (new_clusters > old_clusters) | |
780 | ret = ocfs2_xattr_extend_allocation(inode, | |
781 | new_clusters - old_clusters, | |
b3e5d379 | 782 | vb, ctxt); |
f56654c4 TM |
783 | else |
784 | ret = ocfs2_xattr_shrink_size(inode, | |
785 | old_clusters, new_clusters, | |
b3e5d379 | 786 | vb, ctxt); |
f56654c4 TM |
787 | |
788 | return ret; | |
789 | } | |
cf1d6c76 | 790 | |
936b8834 TM |
791 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
792 | size_t *result, const char *prefix, | |
793 | const char *name, int name_len) | |
794 | { | |
795 | char *p = buffer + *result; | |
796 | int prefix_len = strlen(prefix); | |
797 | int total_len = prefix_len + name_len + 1; | |
798 | ||
799 | *result += total_len; | |
800 | ||
801 | /* we are just looking for how big our buffer needs to be */ | |
802 | if (!size) | |
803 | return 0; | |
804 | ||
805 | if (*result > size) | |
806 | return -ERANGE; | |
807 | ||
808 | memcpy(p, prefix, prefix_len); | |
809 | memcpy(p + prefix_len, name, name_len); | |
810 | p[prefix_len + name_len] = '\0'; | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
cf1d6c76 TY |
815 | static int ocfs2_xattr_list_entries(struct inode *inode, |
816 | struct ocfs2_xattr_header *header, | |
817 | char *buffer, size_t buffer_size) | |
818 | { | |
936b8834 TM |
819 | size_t result = 0; |
820 | int i, type, ret; | |
821 | const char *prefix, *name; | |
cf1d6c76 TY |
822 | |
823 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
824 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
825 | type = ocfs2_xattr_get_type(entry); |
826 | prefix = ocfs2_xattr_prefix(type); | |
827 | ||
828 | if (prefix) { | |
829 | name = (const char *)header + | |
830 | le16_to_cpu(entry->xe_name_offset); | |
831 | ||
832 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
833 | &result, prefix, name, | |
834 | entry->xe_name_len); | |
835 | if (ret) | |
836 | return ret; | |
cf1d6c76 TY |
837 | } |
838 | } | |
839 | ||
936b8834 | 840 | return result; |
cf1d6c76 TY |
841 | } |
842 | ||
843 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
844 | struct ocfs2_dinode *di, | |
845 | char *buffer, | |
846 | size_t buffer_size) | |
847 | { | |
848 | struct ocfs2_xattr_header *header = NULL; | |
849 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
850 | int ret = 0; | |
851 | ||
852 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
853 | return ret; | |
854 | ||
855 | header = (struct ocfs2_xattr_header *) | |
856 | ((void *)di + inode->i_sb->s_blocksize - | |
857 | le16_to_cpu(di->i_xattr_inline_size)); | |
858 | ||
859 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
860 | ||
861 | return ret; | |
862 | } | |
863 | ||
864 | static int ocfs2_xattr_block_list(struct inode *inode, | |
865 | struct ocfs2_dinode *di, | |
866 | char *buffer, | |
867 | size_t buffer_size) | |
868 | { | |
869 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 870 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
871 | int ret = 0; |
872 | ||
873 | if (!di->i_xattr_loc) | |
874 | return ret; | |
875 | ||
4ae1d69b JB |
876 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
877 | &blk_bh); | |
cf1d6c76 TY |
878 | if (ret < 0) { |
879 | mlog_errno(ret); | |
880 | return ret; | |
881 | } | |
cf1d6c76 | 882 | |
0c044f0b | 883 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
884 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
885 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
886 | ret = ocfs2_xattr_list_entries(inode, header, | |
887 | buffer, buffer_size); | |
47bca495 TM |
888 | } else |
889 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 890 | buffer, buffer_size); |
4ae1d69b | 891 | |
cf1d6c76 TY |
892 | brelse(blk_bh); |
893 | ||
894 | return ret; | |
895 | } | |
896 | ||
897 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
898 | char *buffer, | |
899 | size_t size) | |
900 | { | |
901 | int ret = 0, i_ret = 0, b_ret = 0; | |
902 | struct buffer_head *di_bh = NULL; | |
903 | struct ocfs2_dinode *di = NULL; | |
904 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
905 | ||
8154da3d TY |
906 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
907 | return -EOPNOTSUPP; | |
908 | ||
cf1d6c76 TY |
909 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
910 | return ret; | |
911 | ||
912 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
913 | if (ret < 0) { | |
914 | mlog_errno(ret); | |
915 | return ret; | |
916 | } | |
917 | ||
918 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
919 | ||
920 | down_read(&oi->ip_xattr_sem); | |
921 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
922 | if (i_ret < 0) | |
923 | b_ret = 0; | |
924 | else { | |
925 | if (buffer) { | |
926 | buffer += i_ret; | |
927 | size -= i_ret; | |
928 | } | |
929 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
930 | buffer, size); | |
931 | if (b_ret < 0) | |
932 | i_ret = 0; | |
933 | } | |
934 | up_read(&oi->ip_xattr_sem); | |
935 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
936 | ||
937 | brelse(di_bh); | |
938 | ||
939 | return i_ret + b_ret; | |
940 | } | |
941 | ||
942 | static int ocfs2_xattr_find_entry(int name_index, | |
943 | const char *name, | |
944 | struct ocfs2_xattr_search *xs) | |
945 | { | |
946 | struct ocfs2_xattr_entry *entry; | |
947 | size_t name_len; | |
948 | int i, cmp = 1; | |
949 | ||
950 | if (name == NULL) | |
951 | return -EINVAL; | |
952 | ||
953 | name_len = strlen(name); | |
954 | entry = xs->here; | |
955 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
956 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
957 | if (!cmp) | |
958 | cmp = name_len - entry->xe_name_len; | |
959 | if (!cmp) | |
960 | cmp = memcmp(name, (xs->base + | |
961 | le16_to_cpu(entry->xe_name_offset)), | |
962 | name_len); | |
963 | if (cmp == 0) | |
964 | break; | |
965 | entry += 1; | |
966 | } | |
967 | xs->here = entry; | |
968 | ||
969 | return cmp ? -ENODATA : 0; | |
970 | } | |
971 | ||
972 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 973 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
974 | void *buffer, |
975 | size_t len) | |
976 | { | |
977 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
978 | u64 blkno; | |
979 | int i, ret = 0; | |
980 | size_t cplen, blocksize; | |
981 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
982 | struct ocfs2_extent_list *el; |
983 | ||
cf1d6c76 TY |
984 | el = &xv->xr_list; |
985 | clusters = le32_to_cpu(xv->xr_clusters); | |
986 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
987 | blocksize = inode->i_sb->s_blocksize; | |
988 | ||
989 | cpos = 0; | |
990 | while (cpos < clusters) { | |
991 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 992 | &num_clusters, el, NULL); |
cf1d6c76 TY |
993 | if (ret) { |
994 | mlog_errno(ret); | |
995 | goto out; | |
996 | } | |
997 | ||
998 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
999 | /* Copy ocfs2_xattr_value */ | |
1000 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1001 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1002 | &bh, NULL); | |
cf1d6c76 TY |
1003 | if (ret) { |
1004 | mlog_errno(ret); | |
1005 | goto out; | |
1006 | } | |
1007 | ||
1008 | cplen = len >= blocksize ? blocksize : len; | |
1009 | memcpy(buffer, bh->b_data, cplen); | |
1010 | len -= cplen; | |
1011 | buffer += cplen; | |
1012 | ||
1013 | brelse(bh); | |
1014 | bh = NULL; | |
1015 | if (len == 0) | |
1016 | break; | |
1017 | } | |
1018 | cpos += num_clusters; | |
1019 | } | |
1020 | out: | |
1021 | return ret; | |
1022 | } | |
1023 | ||
1024 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1025 | int name_index, | |
1026 | const char *name, | |
1027 | void *buffer, | |
1028 | size_t buffer_size, | |
1029 | struct ocfs2_xattr_search *xs) | |
1030 | { | |
1031 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1032 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1033 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1034 | size_t size; |
1035 | int ret = 0; | |
1036 | ||
1037 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1038 | return -ENODATA; | |
1039 | ||
1040 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1041 | xs->header = (struct ocfs2_xattr_header *) | |
1042 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1043 | xs->base = (void *)xs->header; | |
1044 | xs->here = xs->header->xh_entries; | |
1045 | ||
1046 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1047 | if (ret) | |
1048 | return ret; | |
1049 | size = le64_to_cpu(xs->here->xe_value_size); | |
1050 | if (buffer) { | |
1051 | if (size > buffer_size) | |
1052 | return -ERANGE; | |
1053 | if (ocfs2_xattr_is_local(xs->here)) { | |
1054 | memcpy(buffer, (void *)xs->base + | |
1055 | le16_to_cpu(xs->here->xe_name_offset) + | |
1056 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1057 | } else { | |
589dc260 TM |
1058 | xv = (struct ocfs2_xattr_value_root *) |
1059 | (xs->base + le16_to_cpu( | |
1060 | xs->here->xe_name_offset) + | |
1061 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1062 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1063 | buffer, size); |
1064 | if (ret < 0) { | |
1065 | mlog_errno(ret); | |
1066 | return ret; | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | return size; | |
1072 | } | |
1073 | ||
1074 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1075 | int name_index, | |
1076 | const char *name, | |
1077 | void *buffer, | |
1078 | size_t buffer_size, | |
1079 | struct ocfs2_xattr_search *xs) | |
1080 | { | |
cf1d6c76 | 1081 | struct ocfs2_xattr_block *xb; |
589dc260 | 1082 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1083 | size_t size; |
44d8e4e1 SM |
1084 | int ret = -ENODATA, name_offset, name_len, i; |
1085 | int uninitialized_var(block_off); | |
cf1d6c76 | 1086 | |
ba937127 JB |
1087 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1088 | if (!xs->bucket) { | |
1089 | ret = -ENOMEM; | |
1090 | mlog_errno(ret); | |
1091 | goto cleanup; | |
1092 | } | |
589dc260 | 1093 | |
54f443f4 JB |
1094 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1095 | if (ret) { | |
cf1d6c76 | 1096 | mlog_errno(ret); |
cf1d6c76 TY |
1097 | goto cleanup; |
1098 | } | |
1099 | ||
6c1e183e TY |
1100 | if (xs->not_found) { |
1101 | ret = -ENODATA; | |
1102 | goto cleanup; | |
1103 | } | |
1104 | ||
54f443f4 | 1105 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1106 | size = le64_to_cpu(xs->here->xe_value_size); |
1107 | if (buffer) { | |
1108 | ret = -ERANGE; | |
1109 | if (size > buffer_size) | |
1110 | goto cleanup; | |
589dc260 TM |
1111 | |
1112 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1113 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1114 | i = xs->here - xs->header->xh_entries; | |
1115 | ||
1116 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1117 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1118 | bucket_xh(xs->bucket), |
589dc260 TM |
1119 | i, |
1120 | &block_off, | |
1121 | &name_offset); | |
ba937127 | 1122 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1123 | } |
cf1d6c76 TY |
1124 | if (ocfs2_xattr_is_local(xs->here)) { |
1125 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1126 | name_offset + name_len, size); |
cf1d6c76 | 1127 | } else { |
589dc260 TM |
1128 | xv = (struct ocfs2_xattr_value_root *) |
1129 | (xs->base + name_offset + name_len); | |
1130 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1131 | buffer, size); |
1132 | if (ret < 0) { | |
1133 | mlog_errno(ret); | |
1134 | goto cleanup; | |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ret = size; | |
1139 | cleanup: | |
ba937127 | 1140 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1141 | |
54f443f4 JB |
1142 | brelse(xs->xattr_bh); |
1143 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1144 | return ret; |
1145 | } | |
1146 | ||
4e3e9d02 TY |
1147 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1148 | struct buffer_head *di_bh, | |
0030e001 TY |
1149 | int name_index, |
1150 | const char *name, | |
1151 | void *buffer, | |
1152 | size_t buffer_size) | |
cf1d6c76 TY |
1153 | { |
1154 | int ret; | |
1155 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1156 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1157 | struct ocfs2_xattr_search xis = { | |
1158 | .not_found = -ENODATA, | |
1159 | }; | |
1160 | struct ocfs2_xattr_search xbs = { | |
1161 | .not_found = -ENODATA, | |
1162 | }; | |
1163 | ||
8154da3d TY |
1164 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1165 | return -EOPNOTSUPP; | |
1166 | ||
cf1d6c76 TY |
1167 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1168 | ret = -ENODATA; | |
1169 | ||
cf1d6c76 TY |
1170 | xis.inode_bh = xbs.inode_bh = di_bh; |
1171 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1172 | ||
1173 | down_read(&oi->ip_xattr_sem); | |
1174 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1175 | buffer_size, &xis); | |
6c1e183e | 1176 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1177 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1178 | buffer_size, &xbs); | |
1179 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1180 | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | /* ocfs2_xattr_get() | |
1185 | * | |
1186 | * Copy an extended attribute into the buffer provided. | |
1187 | * Buffer is NULL to compute the size of buffer required. | |
1188 | */ | |
1189 | static int ocfs2_xattr_get(struct inode *inode, | |
1190 | int name_index, | |
1191 | const char *name, | |
1192 | void *buffer, | |
1193 | size_t buffer_size) | |
1194 | { | |
1195 | int ret; | |
1196 | struct buffer_head *di_bh = NULL; | |
1197 | ||
1198 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1199 | if (ret < 0) { | |
1200 | mlog_errno(ret); | |
1201 | return ret; | |
1202 | } | |
1203 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1204 | name, buffer, buffer_size); | |
1205 | ||
cf1d6c76 TY |
1206 | ocfs2_inode_unlock(inode, 0); |
1207 | ||
1208 | brelse(di_bh); | |
1209 | ||
1210 | return ret; | |
1211 | } | |
1212 | ||
1213 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1214 | handle_t *handle, |
492a8a33 | 1215 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1216 | const void *value, |
1217 | int value_len) | |
1218 | { | |
71d548a6 | 1219 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1220 | u16 blocksize = inode->i_sb->s_blocksize; |
1221 | u32 p_cluster, num_clusters; | |
1222 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1223 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1224 | u64 blkno; | |
1225 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1226 | unsigned int ext_flags; |
1227 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1228 | |
1229 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1230 | ||
cf1d6c76 TY |
1231 | while (cpos < clusters) { |
1232 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1233 | &num_clusters, &xv->xr_list, |
492a8a33 | 1234 | &ext_flags); |
cf1d6c76 TY |
1235 | if (ret) { |
1236 | mlog_errno(ret); | |
85db90e7 | 1237 | goto out; |
cf1d6c76 TY |
1238 | } |
1239 | ||
492a8a33 TM |
1240 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1241 | ||
cf1d6c76 TY |
1242 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1243 | ||
1244 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1245 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1246 | &bh, NULL); | |
cf1d6c76 TY |
1247 | if (ret) { |
1248 | mlog_errno(ret); | |
85db90e7 | 1249 | goto out; |
cf1d6c76 TY |
1250 | } |
1251 | ||
1252 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1253 | INODE_CACHE(inode), |
cf1d6c76 TY |
1254 | bh, |
1255 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1256 | if (ret < 0) { | |
1257 | mlog_errno(ret); | |
85db90e7 | 1258 | goto out; |
cf1d6c76 TY |
1259 | } |
1260 | ||
1261 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1262 | memcpy(bh->b_data, value, cp_len); | |
1263 | value_len -= cp_len; | |
1264 | value += cp_len; | |
1265 | if (cp_len < blocksize) | |
1266 | memset(bh->b_data + cp_len, 0, | |
1267 | blocksize - cp_len); | |
1268 | ||
1269 | ret = ocfs2_journal_dirty(handle, bh); | |
1270 | if (ret < 0) { | |
1271 | mlog_errno(ret); | |
85db90e7 | 1272 | goto out; |
cf1d6c76 TY |
1273 | } |
1274 | brelse(bh); | |
1275 | bh = NULL; | |
1276 | ||
1277 | /* | |
1278 | * XXX: do we need to empty all the following | |
1279 | * blocks in this cluster? | |
1280 | */ | |
1281 | if (!value_len) | |
1282 | break; | |
1283 | } | |
1284 | cpos += num_clusters; | |
1285 | } | |
cf1d6c76 TY |
1286 | out: |
1287 | brelse(bh); | |
1288 | ||
1289 | return ret; | |
1290 | } | |
1291 | ||
1292 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1293 | handle_t *handle, |
cf1d6c76 TY |
1294 | struct ocfs2_xattr_info *xi, |
1295 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1296 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1297 | size_t offs) |
1298 | { | |
cf1d6c76 TY |
1299 | int ret = 0; |
1300 | size_t name_len = strlen(xi->name); | |
1301 | void *val = xs->base + offs; | |
1302 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1303 | ||
0cf2f763 | 1304 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
512620f4 | 1305 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1306 | if (ret) { |
1307 | mlog_errno(ret); | |
85db90e7 | 1308 | goto out; |
cf1d6c76 TY |
1309 | } |
1310 | /* Decrease xattr count */ | |
1311 | le16_add_cpu(&xs->header->xh_count, -1); | |
1312 | /* Remove the xattr entry and tree root which has already be set*/ | |
1313 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1314 | memset(val, 0, size); | |
1315 | ||
512620f4 | 1316 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1317 | if (ret < 0) |
1318 | mlog_errno(ret); | |
cf1d6c76 TY |
1319 | out: |
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1324 | handle_t *handle, |
cf1d6c76 TY |
1325 | struct ocfs2_xattr_info *xi, |
1326 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1327 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1328 | size_t offs) |
1329 | { | |
85db90e7 | 1330 | int ret; |
cf1d6c76 | 1331 | |
0cf2f763 | 1332 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
0c748e95 | 1333 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1334 | if (ret) { |
1335 | mlog_errno(ret); | |
85db90e7 | 1336 | goto out; |
cf1d6c76 TY |
1337 | } |
1338 | ||
1339 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1340 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1341 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1342 | ocfs2_xattr_set_local(xs->here, 1); | |
1343 | else | |
1344 | ocfs2_xattr_set_local(xs->here, 0); | |
1345 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1346 | ||
0c748e95 | 1347 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1348 | if (ret < 0) |
1349 | mlog_errno(ret); | |
cf1d6c76 TY |
1350 | out: |
1351 | return ret; | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * ocfs2_xattr_set_value_outside() | |
1356 | * | |
1357 | * Set large size value in B tree. | |
1358 | */ | |
1359 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1360 | struct ocfs2_xattr_info *xi, | |
1361 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1362 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1363 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1364 | size_t offs) |
1365 | { | |
1366 | size_t name_len = strlen(xi->name); | |
1367 | void *val = xs->base + offs; | |
1368 | struct ocfs2_xattr_value_root *xv = NULL; | |
1369 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1370 | int ret = 0; | |
1371 | ||
1372 | memset(val, 0, size); | |
1373 | memcpy(val, xi->name, name_len); | |
1374 | xv = (struct ocfs2_xattr_value_root *) | |
1375 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1376 | xv->xr_clusters = 0; | |
1377 | xv->xr_last_eb_blk = 0; | |
1378 | xv->xr_list.l_tree_depth = 0; | |
1379 | xv->xr_list.l_count = cpu_to_le16(1); | |
1380 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1381 | vb->vb_xv = xv; |
cf1d6c76 | 1382 | |
512620f4 | 1383 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt); |
cf1d6c76 TY |
1384 | if (ret < 0) { |
1385 | mlog_errno(ret); | |
1386 | return ret; | |
1387 | } | |
512620f4 | 1388 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1389 | if (ret < 0) { |
1390 | mlog_errno(ret); | |
1391 | return ret; | |
1392 | } | |
492a8a33 | 1393 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb, |
85db90e7 | 1394 | xi->value, xi->value_len); |
cf1d6c76 TY |
1395 | if (ret < 0) |
1396 | mlog_errno(ret); | |
1397 | ||
1398 | return ret; | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * ocfs2_xattr_set_entry_local() | |
1403 | * | |
1404 | * Set, replace or remove extended attribute in local. | |
1405 | */ | |
1406 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1407 | struct ocfs2_xattr_info *xi, | |
1408 | struct ocfs2_xattr_search *xs, | |
1409 | struct ocfs2_xattr_entry *last, | |
1410 | size_t min_offs) | |
1411 | { | |
1412 | size_t name_len = strlen(xi->name); | |
1413 | int i; | |
1414 | ||
1415 | if (xi->value && xs->not_found) { | |
1416 | /* Insert the new xattr entry. */ | |
1417 | le16_add_cpu(&xs->header->xh_count, 1); | |
1418 | ocfs2_xattr_set_type(last, xi->name_index); | |
1419 | ocfs2_xattr_set_local(last, 1); | |
1420 | last->xe_name_len = name_len; | |
1421 | } else { | |
1422 | void *first_val; | |
1423 | void *val; | |
1424 | size_t offs, size; | |
1425 | ||
1426 | first_val = xs->base + min_offs; | |
1427 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1428 | val = xs->base + offs; | |
1429 | ||
1430 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1431 | OCFS2_XATTR_INLINE_SIZE) | |
1432 | size = OCFS2_XATTR_SIZE(name_len) + | |
1433 | OCFS2_XATTR_ROOT_SIZE; | |
1434 | else | |
1435 | size = OCFS2_XATTR_SIZE(name_len) + | |
1436 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1437 | ||
1438 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1439 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1440 | /* The old and the new value have the | |
1441 | same size. Just replace the value. */ | |
1442 | ocfs2_xattr_set_local(xs->here, 1); | |
1443 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1444 | /* Clear value bytes. */ | |
1445 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1446 | 0, | |
1447 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1448 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1449 | xi->value, | |
1450 | xi->value_len); | |
1451 | return; | |
1452 | } | |
1453 | /* Remove the old name+value. */ | |
1454 | memmove(first_val + size, first_val, val - first_val); | |
1455 | memset(first_val, 0, size); | |
1456 | xs->here->xe_name_hash = 0; | |
1457 | xs->here->xe_name_offset = 0; | |
1458 | ocfs2_xattr_set_local(xs->here, 1); | |
1459 | xs->here->xe_value_size = 0; | |
1460 | ||
1461 | min_offs += size; | |
1462 | ||
1463 | /* Adjust all value offsets. */ | |
1464 | last = xs->header->xh_entries; | |
1465 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1466 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1467 | ||
1468 | if (o < offs) | |
1469 | last->xe_name_offset = cpu_to_le16(o + size); | |
1470 | last += 1; | |
1471 | } | |
1472 | ||
1473 | if (!xi->value) { | |
1474 | /* Remove the old entry. */ | |
1475 | last -= 1; | |
1476 | memmove(xs->here, xs->here + 1, | |
1477 | (void *)last - (void *)xs->here); | |
1478 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1479 | le16_add_cpu(&xs->header->xh_count, -1); | |
1480 | } | |
1481 | } | |
1482 | if (xi->value) { | |
1483 | /* Insert the new name+value. */ | |
1484 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1485 | OCFS2_XATTR_SIZE(xi->value_len); | |
1486 | void *val = xs->base + min_offs - size; | |
1487 | ||
1488 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1489 | memset(val, 0, size); | |
1490 | memcpy(val, xi->name, name_len); | |
1491 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1492 | xi->value, | |
1493 | xi->value_len); | |
1494 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1495 | ocfs2_xattr_set_local(xs->here, 1); | |
1496 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1497 | } | |
1498 | ||
1499 | return; | |
1500 | } | |
1501 | ||
1502 | /* | |
1503 | * ocfs2_xattr_set_entry() | |
1504 | * | |
1505 | * Set extended attribute entry into inode or block. | |
1506 | * | |
1507 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1508 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1509 | * then set value in B tree with set_value_outside(). | |
1510 | */ | |
1511 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1512 | struct ocfs2_xattr_info *xi, | |
1513 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1514 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1515 | int flag) |
1516 | { | |
1517 | struct ocfs2_xattr_entry *last; | |
1518 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1519 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1520 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1521 | size_t size_l = 0; | |
85db90e7 | 1522 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1523 | int free, i, ret; |
1524 | struct ocfs2_xattr_info xi_l = { | |
1525 | .name_index = xi->name_index, | |
1526 | .name = xi->name, | |
1527 | .value = xi->value, | |
1528 | .value_len = xi->value_len, | |
1529 | }; | |
512620f4 JB |
1530 | struct ocfs2_xattr_value_buf vb = { |
1531 | .vb_bh = xs->xattr_bh, | |
1532 | .vb_access = ocfs2_journal_access_di, | |
1533 | }; | |
1534 | ||
1535 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1536 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1537 | vb.vb_access = ocfs2_journal_access_xb; | |
1538 | } else | |
1539 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1540 | |
1541 | /* Compute min_offs, last and free space. */ | |
1542 | last = xs->header->xh_entries; | |
1543 | ||
1544 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1545 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1546 | if (offs < min_offs) | |
1547 | min_offs = offs; | |
1548 | last += 1; | |
1549 | } | |
1550 | ||
4442f518 | 1551 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1552 | if (free < 0) |
b37c4d84 | 1553 | return -EIO; |
cf1d6c76 TY |
1554 | |
1555 | if (!xs->not_found) { | |
1556 | size_t size = 0; | |
1557 | if (ocfs2_xattr_is_local(xs->here)) | |
1558 | size = OCFS2_XATTR_SIZE(name_len) + | |
1559 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1560 | else | |
1561 | size = OCFS2_XATTR_SIZE(name_len) + | |
1562 | OCFS2_XATTR_ROOT_SIZE; | |
1563 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1564 | } | |
1565 | /* Check free space in inode or block */ | |
1566 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1567 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1568 | OCFS2_XATTR_SIZE(name_len) + | |
1569 | OCFS2_XATTR_ROOT_SIZE) { | |
1570 | ret = -ENOSPC; | |
1571 | goto out; | |
1572 | } | |
1573 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1574 | xi_l.value = (void *)&def_xv; | |
1575 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1576 | } else if (xi->value) { | |
1577 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1578 | OCFS2_XATTR_SIZE(name_len) + | |
1579 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1580 | ret = -ENOSPC; | |
1581 | goto out; | |
1582 | } | |
1583 | } | |
1584 | ||
1585 | if (!xs->not_found) { | |
1586 | /* For existing extended attribute */ | |
1587 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1588 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1589 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1590 | void *val = xs->base + offs; | |
1591 | ||
1592 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1593 | /* Replace existing local xattr with tree root */ | |
1594 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1595 | ctxt, &vb, offs); |
cf1d6c76 TY |
1596 | if (ret < 0) |
1597 | mlog_errno(ret); | |
1598 | goto out; | |
1599 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1600 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1601 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1602 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 TY |
1603 | |
1604 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1605 | /* | |
1606 | * If new value need set outside also, | |
1607 | * first truncate old value to new value, | |
1608 | * then set new value with set_value_outside(). | |
1609 | */ | |
1610 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1611 | &vb, |
78f30c31 TM |
1612 | xi->value_len, |
1613 | ctxt); | |
cf1d6c76 TY |
1614 | if (ret < 0) { |
1615 | mlog_errno(ret); | |
1616 | goto out; | |
1617 | } | |
1618 | ||
85db90e7 TM |
1619 | ret = ocfs2_xattr_update_entry(inode, |
1620 | handle, | |
1621 | xi, | |
1622 | xs, | |
0c748e95 | 1623 | &vb, |
85db90e7 | 1624 | offs); |
cf1d6c76 TY |
1625 | if (ret < 0) { |
1626 | mlog_errno(ret); | |
1627 | goto out; | |
1628 | } | |
1629 | ||
85db90e7 TM |
1630 | ret = __ocfs2_xattr_set_value_outside(inode, |
1631 | handle, | |
492a8a33 | 1632 | &vb, |
85db90e7 TM |
1633 | xi->value, |
1634 | xi->value_len); | |
cf1d6c76 TY |
1635 | if (ret < 0) |
1636 | mlog_errno(ret); | |
1637 | goto out; | |
1638 | } else { | |
1639 | /* | |
1640 | * If new value need set in local, | |
1641 | * just trucate old value to zero. | |
1642 | */ | |
1643 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1644 | &vb, |
85db90e7 TM |
1645 | 0, |
1646 | ctxt); | |
cf1d6c76 TY |
1647 | if (ret < 0) |
1648 | mlog_errno(ret); | |
1649 | } | |
1650 | } | |
1651 | } | |
1652 | ||
0cf2f763 | 1653 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh, |
512620f4 | 1654 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1655 | if (ret) { |
1656 | mlog_errno(ret); | |
85db90e7 | 1657 | goto out; |
cf1d6c76 TY |
1658 | } |
1659 | ||
1660 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
0cf2f763 | 1661 | ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh, |
512620f4 | 1662 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1663 | if (ret) { |
1664 | mlog_errno(ret); | |
85db90e7 | 1665 | goto out; |
cf1d6c76 TY |
1666 | } |
1667 | } | |
1668 | ||
1669 | /* | |
1670 | * Set value in local, include set tree root in local. | |
1671 | * This is the first step for value size >INLINE_SIZE. | |
1672 | */ | |
1673 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1674 | ||
1675 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1676 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1677 | if (ret < 0) { | |
1678 | mlog_errno(ret); | |
85db90e7 | 1679 | goto out; |
cf1d6c76 TY |
1680 | } |
1681 | } | |
1682 | ||
1683 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1684 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1685 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1686 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1687 | ||
1688 | /* | |
1689 | * Adjust extent record count or inline data size | |
1690 | * to reserve space for extended attribute. | |
1691 | */ | |
1692 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1693 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1694 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1695 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1696 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1697 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1698 | sizeof(struct ocfs2_extent_rec))); | |
1699 | } | |
1700 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1701 | } | |
1702 | /* Update xattr flag */ | |
1703 | spin_lock(&oi->ip_lock); | |
1704 | oi->ip_dyn_features |= flag; | |
1705 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1706 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1707 | |
1708 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1709 | if (ret < 0) | |
1710 | mlog_errno(ret); | |
1711 | ||
cf1d6c76 TY |
1712 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1713 | /* | |
1714 | * Set value outside in B tree. | |
1715 | * This is the second step for value size > INLINE_SIZE. | |
1716 | */ | |
1717 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1718 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1719 | &vb, offs); | |
cf1d6c76 TY |
1720 | if (ret < 0) { |
1721 | int ret2; | |
1722 | ||
1723 | mlog_errno(ret); | |
1724 | /* | |
1725 | * If set value outside failed, we have to clean | |
1726 | * the junk tree root we have already set in local. | |
1727 | */ | |
85db90e7 | 1728 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1729 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1730 | if (ret2 < 0) |
1731 | mlog_errno(ret2); | |
1732 | } | |
1733 | } | |
1734 | out: | |
1735 | return ret; | |
cf1d6c76 TY |
1736 | } |
1737 | ||
cf1d6c76 | 1738 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 1739 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1740 | struct ocfs2_xattr_header *header) |
1741 | { | |
1742 | int ret = 0, i; | |
78f30c31 TM |
1743 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1744 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
1745 | ||
1746 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 | 1747 | |
a90714c1 JK |
1748 | ctxt.handle = ocfs2_start_trans(osb, |
1749 | ocfs2_remove_extent_credits(osb->sb)); | |
85db90e7 TM |
1750 | if (IS_ERR(ctxt.handle)) { |
1751 | ret = PTR_ERR(ctxt.handle); | |
1752 | mlog_errno(ret); | |
1753 | goto out; | |
1754 | } | |
1755 | ||
cf1d6c76 TY |
1756 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
1757 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1758 | ||
1759 | if (!ocfs2_xattr_is_local(entry)) { | |
cf1d6c76 TY |
1760 | void *val; |
1761 | ||
1762 | val = (void *)header + | |
1763 | le16_to_cpu(entry->xe_name_offset); | |
4311901d | 1764 | vb->vb_xv = (struct ocfs2_xattr_value_root *) |
cf1d6c76 | 1765 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); |
4311901d | 1766 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); |
cf1d6c76 TY |
1767 | if (ret < 0) { |
1768 | mlog_errno(ret); | |
78f30c31 | 1769 | break; |
cf1d6c76 TY |
1770 | } |
1771 | } | |
1772 | } | |
1773 | ||
85db90e7 | 1774 | ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
1775 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1776 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 1777 | out: |
cf1d6c76 TY |
1778 | return ret; |
1779 | } | |
1780 | ||
1781 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1782 | struct buffer_head *di_bh) | |
1783 | { | |
1784 | ||
1785 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1786 | struct ocfs2_xattr_header *header; | |
1787 | int ret; | |
4311901d JB |
1788 | struct ocfs2_xattr_value_buf vb = { |
1789 | .vb_bh = di_bh, | |
1790 | .vb_access = ocfs2_journal_access_di, | |
1791 | }; | |
cf1d6c76 TY |
1792 | |
1793 | header = (struct ocfs2_xattr_header *) | |
1794 | ((void *)di + inode->i_sb->s_blocksize - | |
1795 | le16_to_cpu(di->i_xattr_inline_size)); | |
1796 | ||
4311901d | 1797 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
cf1d6c76 TY |
1798 | |
1799 | return ret; | |
1800 | } | |
1801 | ||
1802 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1803 | struct buffer_head *blk_bh) | |
1804 | { | |
1805 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 1806 | int ret = 0; |
4311901d JB |
1807 | struct ocfs2_xattr_value_buf vb = { |
1808 | .vb_bh = blk_bh, | |
1809 | .vb_access = ocfs2_journal_access_xb, | |
1810 | }; | |
cf1d6c76 TY |
1811 | |
1812 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1813 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1814 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
4311901d | 1815 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
a3944256 | 1816 | } else |
47bca495 TM |
1817 | ret = ocfs2_iterate_xattr_index_block(inode, |
1818 | blk_bh, | |
1819 | ocfs2_rm_xattr_cluster, | |
1820 | NULL); | |
cf1d6c76 TY |
1821 | |
1822 | return ret; | |
1823 | } | |
1824 | ||
08413899 TM |
1825 | static int ocfs2_xattr_free_block(struct inode *inode, |
1826 | u64 block) | |
1827 | { | |
1828 | struct inode *xb_alloc_inode; | |
1829 | struct buffer_head *xb_alloc_bh = NULL; | |
1830 | struct buffer_head *blk_bh = NULL; | |
1831 | struct ocfs2_xattr_block *xb; | |
1832 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1833 | handle_t *handle; | |
1834 | int ret = 0; | |
1835 | u64 blk, bg_blkno; | |
1836 | u16 bit; | |
1837 | ||
4ae1d69b | 1838 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1839 | if (ret < 0) { |
1840 | mlog_errno(ret); | |
1841 | goto out; | |
1842 | } | |
1843 | ||
08413899 TM |
1844 | ret = ocfs2_xattr_block_remove(inode, blk_bh); |
1845 | if (ret < 0) { | |
1846 | mlog_errno(ret); | |
1847 | goto out; | |
1848 | } | |
1849 | ||
4ae1d69b | 1850 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1851 | blk = le64_to_cpu(xb->xb_blkno); |
1852 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1853 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1854 | ||
1855 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1856 | EXTENT_ALLOC_SYSTEM_INODE, | |
1857 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1858 | if (!xb_alloc_inode) { | |
1859 | ret = -ENOMEM; | |
1860 | mlog_errno(ret); | |
1861 | goto out; | |
1862 | } | |
1863 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1864 | ||
1865 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1866 | if (ret < 0) { | |
1867 | mlog_errno(ret); | |
1868 | goto out_mutex; | |
1869 | } | |
1870 | ||
1871 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1872 | if (IS_ERR(handle)) { | |
1873 | ret = PTR_ERR(handle); | |
1874 | mlog_errno(ret); | |
1875 | goto out_unlock; | |
1876 | } | |
1877 | ||
1878 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1879 | bit, bg_blkno, 1); | |
1880 | if (ret < 0) | |
1881 | mlog_errno(ret); | |
1882 | ||
1883 | ocfs2_commit_trans(osb, handle); | |
1884 | out_unlock: | |
1885 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1886 | brelse(xb_alloc_bh); | |
1887 | out_mutex: | |
1888 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1889 | iput(xb_alloc_inode); | |
1890 | out: | |
1891 | brelse(blk_bh); | |
1892 | return ret; | |
1893 | } | |
1894 | ||
cf1d6c76 TY |
1895 | /* |
1896 | * ocfs2_xattr_remove() | |
1897 | * | |
1898 | * Free extended attribute resources associated with this inode. | |
1899 | */ | |
1900 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1901 | { | |
cf1d6c76 TY |
1902 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1903 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1904 | handle_t *handle; | |
1905 | int ret; | |
1906 | ||
8154da3d TY |
1907 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1908 | return 0; | |
1909 | ||
cf1d6c76 TY |
1910 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1911 | return 0; | |
1912 | ||
1913 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1914 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1915 | if (ret < 0) { | |
1916 | mlog_errno(ret); | |
1917 | goto out; | |
1918 | } | |
1919 | } | |
cf1d6c76 | 1920 | |
08413899 TM |
1921 | if (di->i_xattr_loc) { |
1922 | ret = ocfs2_xattr_free_block(inode, | |
1923 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1924 | if (ret < 0) { |
1925 | mlog_errno(ret); | |
1926 | goto out; | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1931 | OCFS2_INODE_UPDATE_CREDITS); | |
1932 | if (IS_ERR(handle)) { | |
1933 | ret = PTR_ERR(handle); | |
1934 | mlog_errno(ret); | |
1935 | goto out; | |
1936 | } | |
0cf2f763 | 1937 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 1938 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1939 | if (ret) { |
1940 | mlog_errno(ret); | |
1941 | goto out_commit; | |
1942 | } | |
1943 | ||
08413899 | 1944 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1945 | |
1946 | spin_lock(&oi->ip_lock); | |
1947 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1948 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1949 | spin_unlock(&oi->ip_lock); | |
1950 | ||
1951 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1952 | if (ret < 0) | |
1953 | mlog_errno(ret); | |
1954 | out_commit: | |
1955 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1956 | out: | |
cf1d6c76 TY |
1957 | return ret; |
1958 | } | |
1959 | ||
1960 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1961 | struct ocfs2_dinode *di) | |
1962 | { | |
1963 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1964 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1965 | int free; | |
1966 | ||
1967 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1968 | return 0; | |
1969 | ||
1970 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1971 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1972 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1973 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1974 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1975 | le64_to_cpu(di->i_size); | |
1976 | } else { | |
1977 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1978 | free = (le16_to_cpu(el->l_count) - | |
1979 | le16_to_cpu(el->l_next_free_rec)) * | |
1980 | sizeof(struct ocfs2_extent_rec); | |
1981 | } | |
1982 | if (free >= xattrsize) | |
1983 | return 1; | |
1984 | ||
1985 | return 0; | |
1986 | } | |
1987 | ||
1988 | /* | |
1989 | * ocfs2_xattr_ibody_find() | |
1990 | * | |
1991 | * Find extended attribute in inode block and | |
1992 | * fill search info into struct ocfs2_xattr_search. | |
1993 | */ | |
1994 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1995 | int name_index, | |
1996 | const char *name, | |
1997 | struct ocfs2_xattr_search *xs) | |
1998 | { | |
1999 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2000 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2001 | int ret; | |
2002 | int has_space = 0; | |
2003 | ||
2004 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2005 | return 0; | |
2006 | ||
2007 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2008 | down_read(&oi->ip_alloc_sem); | |
2009 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2010 | up_read(&oi->ip_alloc_sem); | |
2011 | if (!has_space) | |
2012 | return 0; | |
2013 | } | |
2014 | ||
2015 | xs->xattr_bh = xs->inode_bh; | |
2016 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2017 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2018 | xs->header = (struct ocfs2_xattr_header *) | |
2019 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2020 | else | |
2021 | xs->header = (struct ocfs2_xattr_header *) | |
2022 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2023 | xs->base = (void *)xs->header; | |
2024 | xs->here = xs->header->xh_entries; | |
2025 | ||
2026 | /* Find the named attribute. */ | |
2027 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2028 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2029 | if (ret && ret != -ENODATA) | |
2030 | return ret; | |
2031 | xs->not_found = ret; | |
2032 | } | |
2033 | ||
2034 | return 0; | |
2035 | } | |
2036 | ||
2037 | /* | |
2038 | * ocfs2_xattr_ibody_set() | |
2039 | * | |
2040 | * Set, replace or remove an extended attribute into inode block. | |
2041 | * | |
2042 | */ | |
2043 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2044 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2045 | struct ocfs2_xattr_search *xs, |
2046 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2047 | { |
2048 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2049 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2050 | int ret; | |
2051 | ||
2052 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2053 | return -ENOSPC; | |
2054 | ||
2055 | down_write(&oi->ip_alloc_sem); | |
2056 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2057 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2058 | ret = -ENOSPC; | |
2059 | goto out; | |
2060 | } | |
2061 | } | |
2062 | ||
78f30c31 | 2063 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2064 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2065 | out: | |
2066 | up_write(&oi->ip_alloc_sem); | |
2067 | ||
2068 | return ret; | |
2069 | } | |
2070 | ||
2071 | /* | |
2072 | * ocfs2_xattr_block_find() | |
2073 | * | |
2074 | * Find extended attribute in external block and | |
2075 | * fill search info into struct ocfs2_xattr_search. | |
2076 | */ | |
2077 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2078 | int name_index, | |
2079 | const char *name, | |
2080 | struct ocfs2_xattr_search *xs) | |
2081 | { | |
2082 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2083 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2084 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2085 | int ret = 0; |
2086 | ||
2087 | if (!di->i_xattr_loc) | |
2088 | return ret; | |
2089 | ||
4ae1d69b JB |
2090 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2091 | &blk_bh); | |
cf1d6c76 TY |
2092 | if (ret < 0) { |
2093 | mlog_errno(ret); | |
2094 | return ret; | |
2095 | } | |
f6087fb7 | 2096 | |
cf1d6c76 | 2097 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2098 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2099 | |
2100 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2101 | xs->header = &xb->xb_attrs.xb_header; | |
2102 | xs->base = (void *)xs->header; | |
2103 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2104 | xs->here = xs->header->xh_entries; | |
2105 | ||
2106 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2107 | } else | |
2108 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2109 | name_index, | |
2110 | name, xs); | |
cf1d6c76 | 2111 | |
cf1d6c76 TY |
2112 | if (ret && ret != -ENODATA) { |
2113 | xs->xattr_bh = NULL; | |
2114 | goto cleanup; | |
2115 | } | |
2116 | xs->not_found = ret; | |
2117 | return 0; | |
cf1d6c76 TY |
2118 | cleanup: |
2119 | brelse(blk_bh); | |
2120 | ||
2121 | return ret; | |
2122 | } | |
2123 | ||
5aea1f0e TM |
2124 | static int ocfs2_create_xattr_block(handle_t *handle, |
2125 | struct inode *inode, | |
2126 | struct buffer_head *inode_bh, | |
2127 | struct ocfs2_alloc_context *meta_ac, | |
2128 | struct buffer_head **ret_bh) | |
2129 | { | |
2130 | int ret; | |
2131 | u16 suballoc_bit_start; | |
2132 | u32 num_got; | |
2133 | u64 first_blkno; | |
2134 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; | |
2135 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2136 | struct buffer_head *new_bh = NULL; | |
2137 | struct ocfs2_xattr_block *xblk; | |
2138 | ||
2139 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), inode_bh, | |
2140 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2141 | if (ret < 0) { | |
2142 | mlog_errno(ret); | |
2143 | goto end; | |
2144 | } | |
2145 | ||
2146 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
2147 | &suballoc_bit_start, &num_got, | |
2148 | &first_blkno); | |
2149 | if (ret < 0) { | |
2150 | mlog_errno(ret); | |
2151 | goto end; | |
2152 | } | |
2153 | ||
2154 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2155 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); | |
2156 | ||
2157 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), | |
2158 | new_bh, | |
2159 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2160 | if (ret < 0) { | |
2161 | mlog_errno(ret); | |
2162 | goto end; | |
2163 | } | |
2164 | ||
2165 | /* Initialize ocfs2_xattr_block */ | |
2166 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2167 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2168 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2169 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2170 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2171 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2172 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2173 | ||
2174 | ret = ocfs2_journal_dirty(handle, new_bh); | |
2175 | if (ret < 0) { | |
2176 | mlog_errno(ret); | |
2177 | goto end; | |
2178 | } | |
2179 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
2180 | ocfs2_journal_dirty(handle, inode_bh); | |
2181 | ||
2182 | *ret_bh = new_bh; | |
2183 | new_bh = NULL; | |
2184 | ||
2185 | end: | |
2186 | brelse(new_bh); | |
2187 | return ret; | |
2188 | } | |
2189 | ||
cf1d6c76 TY |
2190 | /* |
2191 | * ocfs2_xattr_block_set() | |
2192 | * | |
2193 | * Set, replace or remove an extended attribute into external block. | |
2194 | * | |
2195 | */ | |
2196 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2197 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2198 | struct ocfs2_xattr_search *xs, |
2199 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2200 | { |
2201 | struct buffer_head *new_bh = NULL; | |
85db90e7 | 2202 | handle_t *handle = ctxt->handle; |
cf1d6c76 | 2203 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 TY |
2204 | int ret; |
2205 | ||
2206 | if (!xs->xattr_bh) { | |
5aea1f0e TM |
2207 | ret = ocfs2_create_xattr_block(handle, inode, xs->inode_bh, |
2208 | ctxt->meta_ac, &new_bh); | |
2209 | if (ret) { | |
cf1d6c76 | 2210 | mlog_errno(ret); |
85db90e7 | 2211 | goto end; |
cf1d6c76 TY |
2212 | } |
2213 | ||
cf1d6c76 | 2214 | xs->xattr_bh = new_bh; |
5aea1f0e | 2215 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2216 | xs->header = &xblk->xb_attrs.xb_header; |
2217 | xs->base = (void *)xs->header; | |
2218 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2219 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2220 | } else |
2221 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2222 | ||
2223 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2224 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2225 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2226 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2227 | if (!ret || ret != -ENOSPC) |
2228 | goto end; | |
2229 | ||
78f30c31 | 2230 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2231 | if (ret) |
2232 | goto end; | |
cf1d6c76 TY |
2233 | } |
2234 | ||
78f30c31 | 2235 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2236 | |
2237 | end: | |
cf1d6c76 TY |
2238 | |
2239 | return ret; | |
2240 | } | |
2241 | ||
78f30c31 TM |
2242 | /* Check whether the new xattr can be inserted into the inode. */ |
2243 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2244 | struct ocfs2_xattr_info *xi, | |
2245 | struct ocfs2_xattr_search *xs) | |
2246 | { | |
2247 | u64 value_size; | |
2248 | struct ocfs2_xattr_entry *last; | |
2249 | int free, i; | |
2250 | size_t min_offs = xs->end - xs->base; | |
2251 | ||
2252 | if (!xs->header) | |
2253 | return 0; | |
2254 | ||
2255 | last = xs->header->xh_entries; | |
2256 | ||
2257 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2258 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2259 | if (offs < min_offs) | |
2260 | min_offs = offs; | |
2261 | last += 1; | |
2262 | } | |
2263 | ||
4442f518 | 2264 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2265 | if (free < 0) |
2266 | return 0; | |
2267 | ||
2268 | BUG_ON(!xs->not_found); | |
2269 | ||
2270 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2271 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2272 | else | |
2273 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2274 | ||
2275 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2276 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2277 | return 1; | |
2278 | ||
2279 | return 0; | |
2280 | } | |
2281 | ||
2282 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2283 | struct ocfs2_dinode *di, | |
2284 | struct ocfs2_xattr_info *xi, | |
2285 | struct ocfs2_xattr_search *xis, | |
2286 | struct ocfs2_xattr_search *xbs, | |
2287 | int *clusters_need, | |
85db90e7 TM |
2288 | int *meta_need, |
2289 | int *credits_need) | |
78f30c31 TM |
2290 | { |
2291 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2292 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2293 | struct buffer_head *bh = NULL; |
2294 | struct ocfs2_xattr_block *xb = NULL; | |
2295 | struct ocfs2_xattr_entry *xe = NULL; | |
2296 | struct ocfs2_xattr_value_root *xv = NULL; | |
2297 | char *base = NULL; | |
2298 | int name_offset, name_len = 0; | |
2299 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2300 | xi->value_len); | |
2301 | u64 value_size; | |
2302 | ||
71d548a6 TM |
2303 | /* |
2304 | * Calculate the clusters we need to write. | |
2305 | * No matter whether we replace an old one or add a new one, | |
2306 | * we need this for writing. | |
2307 | */ | |
2308 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2309 | credits += new_clusters * | |
2310 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2311 | ||
78f30c31 | 2312 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2313 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2314 | ||
2315 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2316 | clusters_add += new_clusters; |
85db90e7 TM |
2317 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2318 | &def_xv.xv.xr_list, | |
2319 | new_clusters); | |
2320 | } | |
78f30c31 TM |
2321 | |
2322 | goto meta_guess; | |
2323 | } | |
2324 | ||
2325 | if (!xis->not_found) { | |
2326 | xe = xis->here; | |
2327 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2328 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2329 | base = xis->base; | |
85db90e7 | 2330 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2331 | } else { |
970e4936 | 2332 | int i, block_off = 0; |
78f30c31 TM |
2333 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2334 | xe = xbs->here; | |
2335 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2336 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2337 | i = xbs->here - xbs->header->xh_entries; | |
2338 | old_in_xb = 1; | |
2339 | ||
2340 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 2341 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
2342 | bucket_xh(xbs->bucket), |
2343 | i, &block_off, | |
2344 | &name_offset); | |
2345 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2346 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2347 | } else { | |
78f30c31 | 2348 | base = xbs->base; |
85db90e7 TM |
2349 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2350 | } | |
2351 | } | |
2352 | ||
2353 | /* | |
2354 | * delete a xattr doesn't need metadata and cluster allocation. | |
2355 | * so just calculate the credits and return. | |
2356 | * | |
2357 | * The credits for removing the value tree will be extended | |
2358 | * by ocfs2_remove_extent itself. | |
2359 | */ | |
2360 | if (!xi->value) { | |
2361 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2362 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2363 | |
2364 | goto out; | |
78f30c31 TM |
2365 | } |
2366 | ||
2367 | /* do cluster allocation guess first. */ | |
2368 | value_size = le64_to_cpu(xe->xe_value_size); | |
2369 | ||
2370 | if (old_in_xb) { | |
2371 | /* | |
2372 | * In xattr set, we always try to set the xe in inode first, | |
2373 | * so if it can be inserted into inode successfully, the old | |
2374 | * one will be removed from the xattr block, and this xattr | |
2375 | * will be inserted into inode as a new xattr in inode. | |
2376 | */ | |
2377 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2378 | clusters_add += new_clusters; | |
a90714c1 | 2379 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2380 | OCFS2_INODE_UPDATE_CREDITS; |
2381 | if (!ocfs2_xattr_is_local(xe)) | |
2382 | credits += ocfs2_calc_extend_credits( | |
2383 | inode->i_sb, | |
2384 | &def_xv.xv.xr_list, | |
2385 | new_clusters); | |
78f30c31 TM |
2386 | goto out; |
2387 | } | |
2388 | } | |
2389 | ||
2390 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2391 | /* the new values will be stored outside. */ | |
2392 | u32 old_clusters = 0; | |
2393 | ||
2394 | if (!ocfs2_xattr_is_local(xe)) { | |
2395 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2396 | value_size); | |
2397 | xv = (struct ocfs2_xattr_value_root *) | |
2398 | (base + name_offset + name_len); | |
97aff52a | 2399 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2400 | } else |
2401 | xv = &def_xv.xv; | |
2402 | ||
85db90e7 | 2403 | if (old_clusters >= new_clusters) { |
a90714c1 | 2404 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2405 | goto out; |
85db90e7 | 2406 | } else { |
78f30c31 TM |
2407 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2408 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2409 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2410 | &xv->xr_list, | |
2411 | new_clusters - | |
2412 | old_clusters); | |
97aff52a TM |
2413 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2414 | goto out; | |
78f30c31 TM |
2415 | } |
2416 | } else { | |
2417 | /* | |
2418 | * Now the new value will be stored inside. So if the new | |
2419 | * value is smaller than the size of value root or the old | |
2420 | * value, we don't need any allocation, otherwise we have | |
2421 | * to guess metadata allocation. | |
2422 | */ | |
2423 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2424 | (!ocfs2_xattr_is_local(xe) && | |
2425 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2426 | goto out; | |
2427 | } | |
2428 | ||
2429 | meta_guess: | |
2430 | /* calculate metadata allocation. */ | |
2431 | if (di->i_xattr_loc) { | |
2432 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2433 | ret = ocfs2_read_xattr_block(inode, |
2434 | le64_to_cpu(di->i_xattr_loc), | |
2435 | &bh); | |
78f30c31 TM |
2436 | if (ret) { |
2437 | mlog_errno(ret); | |
2438 | goto out; | |
2439 | } | |
2440 | ||
2441 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2442 | } else | |
2443 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2444 | ||
90cb546c TM |
2445 | /* |
2446 | * If there is already an xattr tree, good, we can calculate | |
2447 | * like other b-trees. Otherwise we may have the chance of | |
2448 | * create a tree, the credit calculation is borrowed from | |
2449 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2450 | * new tree will be cluster based, so no meta is needed. | |
2451 | */ | |
78f30c31 TM |
2452 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2453 | struct ocfs2_extent_list *el = | |
2454 | &xb->xb_attrs.xb_root.xt_list; | |
2455 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2456 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2457 | el, 1); | |
90cb546c TM |
2458 | } else |
2459 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2460 | |
2461 | /* | |
2462 | * This cluster will be used either for new bucket or for | |
2463 | * new xattr block. | |
2464 | * If the cluster size is the same as the bucket size, one | |
2465 | * more is needed since we may need to extend the bucket | |
2466 | * also. | |
2467 | */ | |
2468 | clusters_add += 1; | |
85db90e7 | 2469 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2470 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2471 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2472 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2473 | clusters_add += 1; |
85db90e7 TM |
2474 | } |
2475 | } else { | |
78f30c31 | 2476 | meta_add += 1; |
85db90e7 TM |
2477 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2478 | } | |
78f30c31 TM |
2479 | out: |
2480 | if (clusters_need) | |
2481 | *clusters_need = clusters_add; | |
2482 | if (meta_need) | |
2483 | *meta_need = meta_add; | |
85db90e7 TM |
2484 | if (credits_need) |
2485 | *credits_need = credits; | |
78f30c31 TM |
2486 | brelse(bh); |
2487 | return ret; | |
2488 | } | |
2489 | ||
2490 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2491 | struct ocfs2_dinode *di, | |
2492 | struct ocfs2_xattr_info *xi, | |
2493 | struct ocfs2_xattr_search *xis, | |
2494 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 2495 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 2496 | int extra_meta, |
85db90e7 | 2497 | int *credits) |
78f30c31 TM |
2498 | { |
2499 | int clusters_add, meta_add, ret; | |
2500 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2501 | ||
2502 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2503 | ||
2504 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2505 | ||
2506 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2507 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2508 | if (ret) { |
2509 | mlog_errno(ret); | |
2510 | return ret; | |
2511 | } | |
2512 | ||
492a8a33 | 2513 | meta_add += extra_meta; |
85db90e7 TM |
2514 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2515 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2516 | |
2517 | if (meta_add) { | |
2518 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2519 | &ctxt->meta_ac); | |
2520 | if (ret) { | |
2521 | mlog_errno(ret); | |
2522 | goto out; | |
2523 | } | |
2524 | } | |
2525 | ||
2526 | if (clusters_add) { | |
2527 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2528 | if (ret) | |
2529 | mlog_errno(ret); | |
2530 | } | |
2531 | out: | |
2532 | if (ret) { | |
2533 | if (ctxt->meta_ac) { | |
2534 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2535 | ctxt->meta_ac = NULL; | |
2536 | } | |
2537 | ||
2538 | /* | |
2539 | * We cannot have an error and a non null ctxt->data_ac. | |
2540 | */ | |
2541 | } | |
2542 | ||
2543 | return ret; | |
2544 | } | |
2545 | ||
85db90e7 TM |
2546 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2547 | struct ocfs2_dinode *di, | |
2548 | struct ocfs2_xattr_info *xi, | |
2549 | struct ocfs2_xattr_search *xis, | |
2550 | struct ocfs2_xattr_search *xbs, | |
2551 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2552 | { | |
9f868f16 | 2553 | int ret = 0, credits, old_found; |
85db90e7 TM |
2554 | |
2555 | if (!xi->value) { | |
2556 | /* Remove existing extended attribute */ | |
2557 | if (!xis->not_found) | |
2558 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2559 | else if (!xbs->not_found) | |
2560 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2561 | } else { | |
2562 | /* We always try to set extended attribute into inode first*/ | |
2563 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2564 | if (!ret && !xbs->not_found) { | |
2565 | /* | |
2566 | * If succeed and that extended attribute existing in | |
2567 | * external block, then we will remove it. | |
2568 | */ | |
2569 | xi->value = NULL; | |
2570 | xi->value_len = 0; | |
2571 | ||
9f868f16 | 2572 | old_found = xis->not_found; |
85db90e7 TM |
2573 | xis->not_found = -ENODATA; |
2574 | ret = ocfs2_calc_xattr_set_need(inode, | |
2575 | di, | |
2576 | xi, | |
2577 | xis, | |
2578 | xbs, | |
2579 | NULL, | |
2580 | NULL, | |
2581 | &credits); | |
9f868f16 | 2582 | xis->not_found = old_found; |
85db90e7 TM |
2583 | if (ret) { |
2584 | mlog_errno(ret); | |
2585 | goto out; | |
2586 | } | |
2587 | ||
2588 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2589 | ctxt->handle->h_buffer_credits); | |
2590 | if (ret) { | |
2591 | mlog_errno(ret); | |
2592 | goto out; | |
2593 | } | |
2594 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2595 | } else if (ret == -ENOSPC) { | |
2596 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2597 | ret = ocfs2_xattr_block_find(inode, | |
2598 | xi->name_index, | |
2599 | xi->name, xbs); | |
2600 | if (ret) | |
2601 | goto out; | |
2602 | ||
9f868f16 | 2603 | old_found = xis->not_found; |
85db90e7 TM |
2604 | xis->not_found = -ENODATA; |
2605 | ret = ocfs2_calc_xattr_set_need(inode, | |
2606 | di, | |
2607 | xi, | |
2608 | xis, | |
2609 | xbs, | |
2610 | NULL, | |
2611 | NULL, | |
2612 | &credits); | |
9f868f16 | 2613 | xis->not_found = old_found; |
85db90e7 TM |
2614 | if (ret) { |
2615 | mlog_errno(ret); | |
2616 | goto out; | |
2617 | } | |
2618 | ||
2619 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2620 | ctxt->handle->h_buffer_credits); | |
2621 | if (ret) { | |
2622 | mlog_errno(ret); | |
2623 | goto out; | |
2624 | } | |
2625 | } | |
2626 | /* | |
2627 | * If no space in inode, we will set extended attribute | |
2628 | * into external block. | |
2629 | */ | |
2630 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2631 | if (ret) | |
2632 | goto out; | |
2633 | if (!xis->not_found) { | |
2634 | /* | |
2635 | * If succeed and that extended attribute | |
2636 | * existing in inode, we will remove it. | |
2637 | */ | |
2638 | xi->value = NULL; | |
2639 | xi->value_len = 0; | |
2640 | xbs->not_found = -ENODATA; | |
2641 | ret = ocfs2_calc_xattr_set_need(inode, | |
2642 | di, | |
2643 | xi, | |
2644 | xis, | |
2645 | xbs, | |
2646 | NULL, | |
2647 | NULL, | |
2648 | &credits); | |
2649 | if (ret) { | |
2650 | mlog_errno(ret); | |
2651 | goto out; | |
2652 | } | |
2653 | ||
2654 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2655 | ctxt->handle->h_buffer_credits); | |
2656 | if (ret) { | |
2657 | mlog_errno(ret); | |
2658 | goto out; | |
2659 | } | |
2660 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2661 | xis, ctxt); | |
2662 | } | |
2663 | } | |
2664 | } | |
2665 | ||
4b3f6209 TM |
2666 | if (!ret) { |
2667 | /* Update inode ctime. */ | |
0cf2f763 | 2668 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
2669 | xis->inode_bh, |
2670 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2671 | if (ret) { |
2672 | mlog_errno(ret); | |
2673 | goto out; | |
2674 | } | |
2675 | ||
2676 | inode->i_ctime = CURRENT_TIME; | |
2677 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2678 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2679 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2680 | } | |
85db90e7 TM |
2681 | out: |
2682 | return ret; | |
2683 | } | |
2684 | ||
6c3faba4 TY |
2685 | /* |
2686 | * This function only called duing creating inode | |
2687 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2688 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2689 | */ |
2690 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2691 | struct inode *inode, | |
2692 | struct buffer_head *di_bh, | |
2693 | int name_index, | |
2694 | const char *name, | |
2695 | const void *value, | |
2696 | size_t value_len, | |
2697 | int flags, | |
2698 | struct ocfs2_alloc_context *meta_ac, | |
2699 | struct ocfs2_alloc_context *data_ac) | |
2700 | { | |
2701 | struct ocfs2_dinode *di; | |
2702 | int ret; | |
2703 | ||
2704 | struct ocfs2_xattr_info xi = { | |
2705 | .name_index = name_index, | |
2706 | .name = name, | |
2707 | .value = value, | |
2708 | .value_len = value_len, | |
2709 | }; | |
2710 | ||
2711 | struct ocfs2_xattr_search xis = { | |
2712 | .not_found = -ENODATA, | |
2713 | }; | |
2714 | ||
2715 | struct ocfs2_xattr_search xbs = { | |
2716 | .not_found = -ENODATA, | |
2717 | }; | |
2718 | ||
2719 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2720 | .handle = handle, | |
2721 | .meta_ac = meta_ac, | |
2722 | .data_ac = data_ac, | |
2723 | }; | |
2724 | ||
2725 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2726 | return -EOPNOTSUPP; | |
2727 | ||
008aafaf TY |
2728 | /* |
2729 | * In extreme situation, may need xattr bucket when | |
2730 | * block size is too small. And we have already reserved | |
2731 | * the credits for bucket in mknod. | |
2732 | */ | |
2733 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2734 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2735 | if (!xbs.bucket) { | |
2736 | mlog_errno(-ENOMEM); | |
2737 | return -ENOMEM; | |
2738 | } | |
2739 | } | |
2740 | ||
6c3faba4 TY |
2741 | xis.inode_bh = xbs.inode_bh = di_bh; |
2742 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2743 | ||
2744 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2745 | ||
2746 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2747 | if (ret) | |
2748 | goto cleanup; | |
2749 | if (xis.not_found) { | |
2750 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2751 | if (ret) | |
2752 | goto cleanup; | |
2753 | } | |
2754 | ||
2755 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2756 | ||
2757 | cleanup: | |
2758 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2759 | brelse(xbs.xattr_bh); | |
008aafaf | 2760 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2761 | |
2762 | return ret; | |
2763 | } | |
2764 | ||
cf1d6c76 TY |
2765 | /* |
2766 | * ocfs2_xattr_set() | |
2767 | * | |
2768 | * Set, replace or remove an extended attribute for this inode. | |
2769 | * value is NULL to remove an existing extended attribute, else either | |
2770 | * create or replace an extended attribute. | |
2771 | */ | |
2772 | int ocfs2_xattr_set(struct inode *inode, | |
2773 | int name_index, | |
2774 | const char *name, | |
2775 | const void *value, | |
2776 | size_t value_len, | |
2777 | int flags) | |
2778 | { | |
2779 | struct buffer_head *di_bh = NULL; | |
2780 | struct ocfs2_dinode *di; | |
492a8a33 | 2781 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 2782 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2783 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2784 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
492a8a33 | 2785 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
2786 | |
2787 | struct ocfs2_xattr_info xi = { | |
2788 | .name_index = name_index, | |
2789 | .name = name, | |
2790 | .value = value, | |
2791 | .value_len = value_len, | |
2792 | }; | |
2793 | ||
2794 | struct ocfs2_xattr_search xis = { | |
2795 | .not_found = -ENODATA, | |
2796 | }; | |
2797 | ||
2798 | struct ocfs2_xattr_search xbs = { | |
2799 | .not_found = -ENODATA, | |
2800 | }; | |
2801 | ||
8154da3d TY |
2802 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2803 | return -EOPNOTSUPP; | |
2804 | ||
ba937127 JB |
2805 | /* |
2806 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2807 | * bucket. | |
2808 | */ | |
2809 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2810 | if (!xbs.bucket) { | |
2811 | mlog_errno(-ENOMEM); | |
2812 | return -ENOMEM; | |
2813 | } | |
2814 | ||
cf1d6c76 TY |
2815 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2816 | if (ret < 0) { | |
2817 | mlog_errno(ret); | |
ba937127 | 2818 | goto cleanup_nolock; |
cf1d6c76 TY |
2819 | } |
2820 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2821 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2822 | ||
2823 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2824 | /* | |
2825 | * Scan inode and external block to find the same name | |
2826 | * extended attribute and collect search infomation. | |
2827 | */ | |
2828 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2829 | if (ret) | |
2830 | goto cleanup; | |
2831 | if (xis.not_found) { | |
2832 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2833 | if (ret) | |
2834 | goto cleanup; | |
2835 | } | |
2836 | ||
2837 | if (xis.not_found && xbs.not_found) { | |
2838 | ret = -ENODATA; | |
2839 | if (flags & XATTR_REPLACE) | |
2840 | goto cleanup; | |
2841 | ret = 0; | |
2842 | if (!value) | |
2843 | goto cleanup; | |
2844 | } else { | |
2845 | ret = -EEXIST; | |
2846 | if (flags & XATTR_CREATE) | |
2847 | goto cleanup; | |
2848 | } | |
2849 | ||
492a8a33 TM |
2850 | /* Check whether the value is refcounted and do some prepartion. */ |
2851 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && | |
2852 | (!xis.not_found || !xbs.not_found)) { | |
2853 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
2854 | &xis, &xbs, &ref_tree, | |
2855 | &ref_meta, &ref_credits); | |
2856 | if (ret) { | |
2857 | mlog_errno(ret); | |
2858 | goto cleanup; | |
2859 | } | |
2860 | } | |
85db90e7 TM |
2861 | |
2862 | mutex_lock(&tl_inode->i_mutex); | |
2863 | ||
2864 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2865 | ret = __ocfs2_flush_truncate_log(osb); | |
2866 | if (ret < 0) { | |
2867 | mutex_unlock(&tl_inode->i_mutex); | |
2868 | mlog_errno(ret); | |
2869 | goto cleanup; | |
2870 | } | |
2871 | } | |
2872 | mutex_unlock(&tl_inode->i_mutex); | |
2873 | ||
2874 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 2875 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
2876 | if (ret) { |
2877 | mlog_errno(ret); | |
2878 | goto cleanup; | |
2879 | } | |
2880 | ||
4b3f6209 TM |
2881 | /* we need to update inode's ctime field, so add credit for it. */ |
2882 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 2883 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
2884 | if (IS_ERR(ctxt.handle)) { |
2885 | ret = PTR_ERR(ctxt.handle); | |
2886 | mlog_errno(ret); | |
2887 | goto cleanup; | |
cf1d6c76 | 2888 | } |
85db90e7 TM |
2889 | |
2890 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2891 | ||
2892 | ocfs2_commit_trans(osb, ctxt.handle); | |
2893 | ||
78f30c31 TM |
2894 | if (ctxt.data_ac) |
2895 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2896 | if (ctxt.meta_ac) | |
2897 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2898 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2899 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2900 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 | 2901 | cleanup: |
492a8a33 TM |
2902 | if (ref_tree) |
2903 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 TY |
2904 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
2905 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2906 | cleanup_nolock: |
cf1d6c76 TY |
2907 | brelse(di_bh); |
2908 | brelse(xbs.xattr_bh); | |
ba937127 | 2909 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2910 | |
2911 | return ret; | |
2912 | } | |
2913 | ||
0c044f0b TM |
2914 | /* |
2915 | * Find the xattr extent rec which may contains name_hash. | |
2916 | * e_cpos will be the first name hash of the xattr rec. | |
2917 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2918 | */ | |
2919 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2920 | u32 name_hash, | |
2921 | u64 *p_blkno, | |
2922 | u32 *e_cpos, | |
2923 | u32 *num_clusters, | |
2924 | struct ocfs2_extent_list *el) | |
2925 | { | |
2926 | int ret = 0, i; | |
2927 | struct buffer_head *eb_bh = NULL; | |
2928 | struct ocfs2_extent_block *eb; | |
2929 | struct ocfs2_extent_rec *rec = NULL; | |
2930 | u64 e_blkno = 0; | |
2931 | ||
2932 | if (el->l_tree_depth) { | |
facdb77f JB |
2933 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
2934 | &eb_bh); | |
0c044f0b TM |
2935 | if (ret) { |
2936 | mlog_errno(ret); | |
2937 | goto out; | |
2938 | } | |
2939 | ||
2940 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2941 | el = &eb->h_list; | |
2942 | ||
2943 | if (el->l_tree_depth) { | |
2944 | ocfs2_error(inode->i_sb, | |
2945 | "Inode %lu has non zero tree depth in " | |
2946 | "xattr tree block %llu\n", inode->i_ino, | |
2947 | (unsigned long long)eb_bh->b_blocknr); | |
2948 | ret = -EROFS; | |
2949 | goto out; | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2954 | rec = &el->l_recs[i]; | |
2955 | ||
2956 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2957 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2958 | break; | |
2959 | } | |
2960 | } | |
2961 | ||
2962 | if (!e_blkno) { | |
2963 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2964 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2965 | le32_to_cpu(rec->e_cpos), | |
2966 | ocfs2_rec_clusters(el, rec)); | |
2967 | ret = -EROFS; | |
2968 | goto out; | |
2969 | } | |
2970 | ||
2971 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2972 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2973 | if (e_cpos) | |
2974 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2975 | out: | |
2976 | brelse(eb_bh); | |
2977 | return ret; | |
2978 | } | |
2979 | ||
2980 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2981 | struct ocfs2_xattr_bucket *bucket, | |
2982 | void *para); | |
2983 | ||
589dc260 | 2984 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2985 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2986 | int name_index, |
2987 | const char *name, | |
2988 | u32 name_hash, | |
2989 | u16 *xe_index, | |
2990 | int *found) | |
2991 | { | |
2992 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2993 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2994 | size_t name_len = strlen(name); |
2995 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2996 | char *xe_name; |
2997 | ||
2998 | /* | |
2999 | * We don't use binary search in the bucket because there | |
3000 | * may be multiple entries with the same name hash. | |
3001 | */ | |
3002 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3003 | xe = &xh->xh_entries[i]; | |
3004 | ||
3005 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3006 | continue; | |
3007 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3008 | break; | |
3009 | ||
3010 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3011 | if (!cmp) | |
3012 | cmp = name_len - xe->xe_name_len; | |
3013 | if (cmp) | |
3014 | continue; | |
3015 | ||
fd68a894 | 3016 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3017 | xh, |
3018 | i, | |
3019 | &block_off, | |
3020 | &new_offset); | |
3021 | if (ret) { | |
3022 | mlog_errno(ret); | |
3023 | break; | |
3024 | } | |
3025 | ||
970e4936 | 3026 | |
e2356a3f JB |
3027 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3028 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3029 | *xe_index = i; |
3030 | *found = 1; | |
3031 | ret = 0; | |
3032 | break; | |
3033 | } | |
3034 | } | |
3035 | ||
3036 | return ret; | |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | * Find the specified xattr entry in a series of buckets. | |
3041 | * This series start from p_blkno and last for num_clusters. | |
3042 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3043 | * the num of the valid buckets. | |
3044 | * | |
3045 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3046 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3047 | */ | |
3048 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3049 | int name_index, | |
3050 | const char *name, | |
3051 | u32 name_hash, | |
3052 | u64 p_blkno, | |
3053 | u32 first_hash, | |
3054 | u32 num_clusters, | |
3055 | struct ocfs2_xattr_search *xs) | |
3056 | { | |
3057 | int ret, found = 0; | |
589dc260 TM |
3058 | struct ocfs2_xattr_header *xh = NULL; |
3059 | struct ocfs2_xattr_entry *xe = NULL; | |
3060 | u16 index = 0; | |
3061 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3062 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3063 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3064 | u32 last_hash; |
e2356a3f | 3065 | u64 blkno, lower_blkno = 0; |
589dc260 | 3066 | |
e2356a3f JB |
3067 | search = ocfs2_xattr_bucket_new(inode); |
3068 | if (!search) { | |
3069 | ret = -ENOMEM; | |
3070 | mlog_errno(ret); | |
3071 | goto out; | |
3072 | } | |
3073 | ||
3074 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3075 | if (ret) { |
3076 | mlog_errno(ret); | |
3077 | goto out; | |
3078 | } | |
3079 | ||
e2356a3f | 3080 | xh = bucket_xh(search); |
589dc260 | 3081 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3082 | while (low_bucket <= high_bucket) { |
e2356a3f | 3083 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3084 | |
e2356a3f | 3085 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3086 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3087 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3088 | if (ret) { |
3089 | mlog_errno(ret); | |
3090 | goto out; | |
3091 | } | |
3092 | ||
e2356a3f | 3093 | xh = bucket_xh(search); |
589dc260 TM |
3094 | xe = &xh->xh_entries[0]; |
3095 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3096 | high_bucket = bucket - 1; | |
3097 | continue; | |
3098 | } | |
3099 | ||
3100 | /* | |
3101 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3102 | * bucket is larger than the search one. for an empty |
3103 | * bucket, the last one is also the first one. | |
589dc260 | 3104 | */ |
5a095611 TM |
3105 | if (xh->xh_count) |
3106 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3107 | ||
589dc260 TM |
3108 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3109 | ||
e2356a3f JB |
3110 | /* record lower_blkno which may be the insert place. */ |
3111 | lower_blkno = blkno; | |
589dc260 TM |
3112 | |
3113 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3114 | low_bucket = bucket + 1; | |
3115 | continue; | |
3116 | } | |
3117 | ||
3118 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3119 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3120 | name_index, name, name_hash, |
3121 | &index, &found); | |
3122 | if (ret) { | |
3123 | mlog_errno(ret); | |
3124 | goto out; | |
3125 | } | |
3126 | break; | |
3127 | } | |
3128 | ||
3129 | /* | |
3130 | * Record the bucket we have found. | |
3131 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3132 | * always set it to the previous bucket. | |
3133 | */ | |
e2356a3f JB |
3134 | if (!lower_blkno) |
3135 | lower_blkno = p_blkno; | |
3136 | ||
3137 | /* This should be in cache - we just read it during the search */ | |
3138 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3139 | if (ret) { | |
3140 | mlog_errno(ret); | |
3141 | goto out; | |
589dc260 | 3142 | } |
589dc260 | 3143 | |
ba937127 JB |
3144 | xs->header = bucket_xh(xs->bucket); |
3145 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3146 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3147 | ||
3148 | if (found) { | |
589dc260 TM |
3149 | xs->here = &xs->header->xh_entries[index]; |
3150 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3151 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3152 | } else |
3153 | ret = -ENODATA; | |
3154 | ||
3155 | out: | |
e2356a3f | 3156 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3157 | return ret; |
3158 | } | |
3159 | ||
3160 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3161 | struct buffer_head *root_bh, | |
3162 | int name_index, | |
3163 | const char *name, | |
3164 | struct ocfs2_xattr_search *xs) | |
3165 | { | |
3166 | int ret; | |
3167 | struct ocfs2_xattr_block *xb = | |
3168 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3169 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3170 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3171 | u64 p_blkno = 0; | |
3172 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3173 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3174 | |
3175 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3176 | return -ENODATA; | |
3177 | ||
3178 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3179 | name, name_hash, name_index); | |
3180 | ||
3181 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3182 | &num_clusters, el); | |
3183 | if (ret) { | |
3184 | mlog_errno(ret); | |
3185 | goto out; | |
3186 | } | |
3187 | ||
3188 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3189 | ||
3190 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3191 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3192 | first_hash); | |
589dc260 TM |
3193 | |
3194 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3195 | p_blkno, first_hash, num_clusters, xs); | |
3196 | ||
3197 | out: | |
3198 | return ret; | |
3199 | } | |
3200 | ||
0c044f0b TM |
3201 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3202 | u64 blkno, | |
3203 | u32 clusters, | |
3204 | xattr_bucket_func *func, | |
3205 | void *para) | |
3206 | { | |
6dde41d9 | 3207 | int i, ret = 0; |
0c044f0b TM |
3208 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3209 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3210 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3211 | |
ba937127 JB |
3212 | bucket = ocfs2_xattr_bucket_new(inode); |
3213 | if (!bucket) { | |
3214 | mlog_errno(-ENOMEM); | |
3215 | return -ENOMEM; | |
3216 | } | |
0c044f0b TM |
3217 | |
3218 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3219 | clusters, (unsigned long long)blkno); |
0c044f0b | 3220 | |
ba937127 JB |
3221 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3222 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3223 | if (ret) { |
3224 | mlog_errno(ret); | |
ba937127 | 3225 | break; |
0c044f0b TM |
3226 | } |
3227 | ||
0c044f0b TM |
3228 | /* |
3229 | * The real bucket num in this series of blocks is stored | |
3230 | * in the 1st bucket. | |
3231 | */ | |
3232 | if (i == 0) | |
ba937127 | 3233 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3234 | |
de29c085 MF |
3235 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3236 | (unsigned long long)blkno, | |
ba937127 | 3237 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3238 | if (func) { |
ba937127 | 3239 | ret = func(inode, bucket, para); |
a46fa684 | 3240 | if (ret && ret != -ERANGE) |
0c044f0b | 3241 | mlog_errno(ret); |
ba937127 | 3242 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3243 | } |
3244 | ||
ba937127 JB |
3245 | ocfs2_xattr_bucket_relse(bucket); |
3246 | if (ret) | |
3247 | break; | |
0c044f0b TM |
3248 | } |
3249 | ||
ba937127 | 3250 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3251 | return ret; |
3252 | } | |
3253 | ||
3254 | struct ocfs2_xattr_tree_list { | |
3255 | char *buffer; | |
3256 | size_t buffer_size; | |
936b8834 | 3257 | size_t result; |
0c044f0b TM |
3258 | }; |
3259 | ||
fd68a894 | 3260 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
3261 | struct ocfs2_xattr_header *xh, |
3262 | int index, | |
3263 | int *block_off, | |
3264 | int *new_offset) | |
3265 | { | |
3266 | u16 name_offset; | |
3267 | ||
3268 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3269 | return -EINVAL; | |
3270 | ||
3271 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3272 | ||
fd68a894 TM |
3273 | *block_off = name_offset >> sb->s_blocksize_bits; |
3274 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
3275 | |
3276 | return 0; | |
3277 | } | |
3278 | ||
3279 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3280 | struct ocfs2_xattr_bucket *bucket, | |
3281 | void *para) | |
3282 | { | |
936b8834 | 3283 | int ret = 0, type; |
0c044f0b | 3284 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3285 | int i, block_off, new_offset; |
936b8834 | 3286 | const char *prefix, *name; |
0c044f0b | 3287 | |
3e632946 JB |
3288 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3289 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3290 | type = ocfs2_xattr_get_type(entry); |
3291 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3292 | |
936b8834 | 3293 | if (prefix) { |
fd68a894 | 3294 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 3295 | bucket_xh(bucket), |
0c044f0b TM |
3296 | i, |
3297 | &block_off, | |
3298 | &new_offset); | |
3299 | if (ret) | |
3300 | break; | |
936b8834 | 3301 | |
51def39f | 3302 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3303 | new_offset; |
3304 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3305 | xl->buffer_size, | |
3306 | &xl->result, | |
3307 | prefix, name, | |
3308 | entry->xe_name_len); | |
3309 | if (ret) | |
3310 | break; | |
0c044f0b TM |
3311 | } |
3312 | } | |
3313 | ||
3314 | return ret; | |
3315 | } | |
3316 | ||
47bca495 TM |
3317 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
3318 | struct buffer_head *blk_bh, | |
3319 | xattr_tree_rec_func *rec_func, | |
3320 | void *para) | |
0c044f0b | 3321 | { |
47bca495 TM |
3322 | struct ocfs2_xattr_block *xb = |
3323 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
3324 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
3325 | int ret = 0; |
3326 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3327 | u64 p_blkno = 0; | |
0c044f0b | 3328 | |
47bca495 | 3329 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
3330 | return 0; |
3331 | ||
3332 | while (name_hash > 0) { | |
3333 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3334 | &e_cpos, &num_clusters, el); | |
3335 | if (ret) { | |
3336 | mlog_errno(ret); | |
47bca495 | 3337 | break; |
0c044f0b TM |
3338 | } |
3339 | ||
47bca495 TM |
3340 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
3341 | num_clusters, para); | |
0c044f0b | 3342 | if (ret) { |
a46fa684 TM |
3343 | if (ret != -ERANGE) |
3344 | mlog_errno(ret); | |
47bca495 | 3345 | break; |
0c044f0b TM |
3346 | } |
3347 | ||
3348 | if (e_cpos == 0) | |
3349 | break; | |
3350 | ||
3351 | name_hash = e_cpos - 1; | |
3352 | } | |
3353 | ||
47bca495 TM |
3354 | return ret; |
3355 | ||
3356 | } | |
3357 | ||
3358 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
3359 | struct buffer_head *root_bh, | |
3360 | u64 blkno, u32 cpos, u32 len, void *para) | |
3361 | { | |
3362 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
3363 | ocfs2_list_xattr_bucket, para); | |
3364 | } | |
3365 | ||
3366 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3367 | struct buffer_head *blk_bh, | |
3368 | char *buffer, | |
3369 | size_t buffer_size) | |
3370 | { | |
3371 | int ret; | |
3372 | struct ocfs2_xattr_tree_list xl = { | |
3373 | .buffer = buffer, | |
3374 | .buffer_size = buffer_size, | |
3375 | .result = 0, | |
3376 | }; | |
3377 | ||
3378 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
3379 | ocfs2_list_xattr_tree_rec, &xl); | |
3380 | if (ret) { | |
3381 | mlog_errno(ret); | |
3382 | goto out; | |
3383 | } | |
3384 | ||
936b8834 | 3385 | ret = xl.result; |
0c044f0b TM |
3386 | out: |
3387 | return ret; | |
3388 | } | |
01225596 TM |
3389 | |
3390 | static int cmp_xe(const void *a, const void *b) | |
3391 | { | |
3392 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3393 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3394 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3395 | ||
3396 | if (l_hash > r_hash) | |
3397 | return 1; | |
3398 | if (l_hash < r_hash) | |
3399 | return -1; | |
3400 | return 0; | |
3401 | } | |
3402 | ||
3403 | static void swap_xe(void *a, void *b, int size) | |
3404 | { | |
3405 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3406 | ||
3407 | tmp = *l; | |
3408 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3409 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3410 | } | |
3411 | ||
3412 | /* | |
3413 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3414 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3415 | * The header goes at the start of the bucket, and the names+values are |
3416 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3417 | * Note: we need to sort the entries since they are not saved in order |
3418 | * in the ocfs2_xattr_block. | |
3419 | */ | |
3420 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3421 | struct buffer_head *xb_bh, | |
178eeac3 | 3422 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3423 | { |
3424 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3425 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3426 | u16 offset, size, off_change; |
3427 | struct ocfs2_xattr_entry *xe; | |
3428 | struct ocfs2_xattr_block *xb = | |
3429 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3430 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3431 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3432 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3433 | char *src = xb_bh->b_data; |
3434 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3435 | |
3436 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3437 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3438 | (unsigned long long)bucket_blkno(bucket)); |
3439 | ||
3440 | for (i = 0; i < blks; i++) | |
3441 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3442 | |
01225596 TM |
3443 | /* |
3444 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3445 | * there is a offset change corresponding to the change of | |
3446 | * ocfs2_xattr_header's position. | |
3447 | */ | |
3448 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3449 | xe = &xb_xh->xh_entries[count - 1]; | |
3450 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3451 | size = blocksize - offset; | |
3452 | ||
3453 | /* copy all the names and values. */ | |
01225596 TM |
3454 | memcpy(target + offset, src + offset, size); |
3455 | ||
3456 | /* Init new header now. */ | |
3457 | xh->xh_count = xb_xh->xh_count; | |
3458 | xh->xh_num_buckets = cpu_to_le16(1); | |
3459 | xh->xh_name_value_len = cpu_to_le16(size); | |
3460 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3461 | ||
3462 | /* copy all the entries. */ | |
178eeac3 | 3463 | target = bucket_block(bucket, 0); |
01225596 TM |
3464 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3465 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3466 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3467 | ||
3468 | /* Change the xe offset for all the xe because of the move. */ | |
3469 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3470 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3471 | for (i = 0; i < count; i++) | |
3472 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3473 | ||
3474 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3475 | offset, size, off_change); | |
3476 | ||
3477 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3478 | cmp_xe, swap_xe); | |
3479 | } | |
3480 | ||
3481 | /* | |
3482 | * After we move xattr from block to index btree, we have to | |
3483 | * update ocfs2_xattr_search to the new xe and base. | |
3484 | * | |
3485 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3486 | * While if the entry is in index b-tree, "bucket" indicates the | |
3487 | * real place of the xattr. | |
3488 | */ | |
178eeac3 JB |
3489 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3490 | struct ocfs2_xattr_search *xs, | |
3491 | struct buffer_head *old_bh) | |
01225596 | 3492 | { |
01225596 TM |
3493 | char *buf = old_bh->b_data; |
3494 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3495 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3496 | int i; |
01225596 | 3497 | |
ba937127 | 3498 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3499 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3500 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3501 | ||
178eeac3 JB |
3502 | if (xs->not_found) |
3503 | return; | |
01225596 | 3504 | |
178eeac3 JB |
3505 | i = xs->here - old_xh->xh_entries; |
3506 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3507 | } |
3508 | ||
3509 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3510 | struct ocfs2_xattr_search *xs, |
3511 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3512 | { |
85db90e7 | 3513 | int ret; |
01225596 TM |
3514 | u32 bit_off, len; |
3515 | u64 blkno; | |
85db90e7 | 3516 | handle_t *handle = ctxt->handle; |
01225596 TM |
3517 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3518 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3519 | struct buffer_head *xb_bh = xs->xattr_bh; |
3520 | struct ocfs2_xattr_block *xb = | |
3521 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3522 | struct ocfs2_xattr_tree_root *xr; | |
3523 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3524 | |
3525 | mlog(0, "create xattr index block for %llu\n", | |
3526 | (unsigned long long)xb_bh->b_blocknr); | |
3527 | ||
3528 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3529 | BUG_ON(!xs->bucket); |
01225596 | 3530 | |
01225596 TM |
3531 | /* |
3532 | * XXX: | |
3533 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3534 | * if performance becomes a problem later. | |
3535 | */ | |
3536 | down_write(&oi->ip_alloc_sem); | |
3537 | ||
0cf2f763 | 3538 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 3539 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3540 | if (ret) { |
3541 | mlog_errno(ret); | |
85db90e7 | 3542 | goto out; |
01225596 TM |
3543 | } |
3544 | ||
78f30c31 TM |
3545 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3546 | 1, 1, &bit_off, &len); | |
01225596 TM |
3547 | if (ret) { |
3548 | mlog_errno(ret); | |
85db90e7 | 3549 | goto out; |
01225596 TM |
3550 | } |
3551 | ||
3552 | /* | |
3553 | * The bucket may spread in many blocks, and | |
3554 | * we will only touch the 1st block and the last block | |
3555 | * in the whole bucket(one for entry and one for data). | |
3556 | */ | |
3557 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3558 | ||
de29c085 MF |
3559 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3560 | (unsigned long long)blkno); | |
01225596 | 3561 | |
178eeac3 JB |
3562 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3563 | if (ret) { | |
01225596 | 3564 | mlog_errno(ret); |
85db90e7 | 3565 | goto out; |
01225596 TM |
3566 | } |
3567 | ||
178eeac3 JB |
3568 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3569 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3570 | if (ret) { |
3571 | mlog_errno(ret); | |
85db90e7 | 3572 | goto out; |
01225596 TM |
3573 | } |
3574 | ||
178eeac3 JB |
3575 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3576 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3577 | |
178eeac3 | 3578 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3579 | |
3580 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3581 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3582 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3583 | ||
3584 | xr = &xb->xb_attrs.xb_root; | |
3585 | xr->xt_clusters = cpu_to_le32(1); | |
3586 | xr->xt_last_eb_blk = 0; | |
3587 | xr->xt_list.l_tree_depth = 0; | |
3588 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3589 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3590 | ||
3591 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3592 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3593 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3594 | ||
3595 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3596 | ||
85db90e7 | 3597 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3598 | |
85db90e7 | 3599 | out: |
01225596 TM |
3600 | up_write(&oi->ip_alloc_sem); |
3601 | ||
01225596 TM |
3602 | return ret; |
3603 | } | |
3604 | ||
3605 | static int cmp_xe_offset(const void *a, const void *b) | |
3606 | { | |
3607 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3608 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3609 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3610 | ||
3611 | if (l_name_offset < r_name_offset) | |
3612 | return 1; | |
3613 | if (l_name_offset > r_name_offset) | |
3614 | return -1; | |
3615 | return 0; | |
3616 | } | |
3617 | ||
3618 | /* | |
3619 | * defrag a xattr bucket if we find that the bucket has some | |
3620 | * holes beteen name/value pairs. | |
3621 | * We will move all the name/value pairs to the end of the bucket | |
3622 | * so that we can spare some space for insertion. | |
3623 | */ | |
3624 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3625 | handle_t *handle, |
01225596 TM |
3626 | struct ocfs2_xattr_bucket *bucket) |
3627 | { | |
3628 | int ret, i; | |
3629 | size_t end, offset, len, value_len; | |
3630 | struct ocfs2_xattr_header *xh; | |
3631 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3632 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3633 | u16 xh_free_start; |
01225596 | 3634 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3635 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3636 | |
3637 | /* | |
3638 | * In order to make the operation more efficient and generic, | |
3639 | * we copy all the blocks into a contiguous memory and do the | |
3640 | * defragment there, so if anything is error, we will not touch | |
3641 | * the real block. | |
3642 | */ | |
3643 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3644 | if (!bucket_buf) { | |
3645 | ret = -EIO; | |
3646 | goto out; | |
3647 | } | |
3648 | ||
3649 | buf = bucket_buf; | |
1c32a2fd TM |
3650 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3651 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3652 | |
1c32a2fd | 3653 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3654 | OCFS2_JOURNAL_ACCESS_WRITE); |
3655 | if (ret < 0) { | |
3656 | mlog_errno(ret); | |
85db90e7 | 3657 | goto out; |
01225596 TM |
3658 | } |
3659 | ||
3660 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3661 | entries = (char *)xh->xh_entries; | |
3662 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3663 | ||
3664 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3665 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3666 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3667 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3668 | |
3669 | /* | |
3670 | * sort all the entries by their offset. | |
3671 | * the largest will be the first, so that we can | |
3672 | * move them to the end one by one. | |
3673 | */ | |
3674 | sort(entries, le16_to_cpu(xh->xh_count), | |
3675 | sizeof(struct ocfs2_xattr_entry), | |
3676 | cmp_xe_offset, swap_xe); | |
3677 | ||
3678 | /* Move all name/values to the end of the bucket. */ | |
3679 | xe = xh->xh_entries; | |
3680 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3681 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3682 | offset = le16_to_cpu(xe->xe_name_offset); | |
3683 | if (ocfs2_xattr_is_local(xe)) | |
3684 | value_len = OCFS2_XATTR_SIZE( | |
3685 | le64_to_cpu(xe->xe_value_size)); | |
3686 | else | |
3687 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3688 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3689 | ||
3690 | /* | |
3691 | * We must make sure that the name/value pair | |
3692 | * exist in the same block. So adjust end to | |
3693 | * the previous block end if needed. | |
3694 | */ | |
3695 | if (((end - len) / blocksize != | |
3696 | (end - 1) / blocksize)) | |
3697 | end = end - end % blocksize; | |
3698 | ||
3699 | if (end > offset + len) { | |
3700 | memmove(bucket_buf + end - len, | |
3701 | bucket_buf + offset, len); | |
3702 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3703 | } | |
3704 | ||
3705 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3706 | "bucket %llu\n", (unsigned long long)blkno); | |
3707 | ||
3708 | end -= len; | |
3709 | } | |
3710 | ||
3711 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3712 | "bucket %llu\n", (unsigned long long)blkno); | |
3713 | ||
3714 | if (xh_free_start == end) | |
85db90e7 | 3715 | goto out; |
01225596 TM |
3716 | |
3717 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3718 | xh->xh_free_start = cpu_to_le16(end); | |
3719 | ||
3720 | /* sort the entries by their name_hash. */ | |
3721 | sort(entries, le16_to_cpu(xh->xh_count), | |
3722 | sizeof(struct ocfs2_xattr_entry), | |
3723 | cmp_xe, swap_xe); | |
3724 | ||
3725 | buf = bucket_buf; | |
1c32a2fd TM |
3726 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3727 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3728 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3729 | |
01225596 | 3730 | out: |
01225596 TM |
3731 | kfree(bucket_buf); |
3732 | return ret; | |
3733 | } | |
3734 | ||
3735 | /* | |
b5c03e74 JB |
3736 | * prev_blkno points to the start of an existing extent. new_blkno |
3737 | * points to a newly allocated extent. Because we know each of our | |
3738 | * clusters contains more than bucket, we can easily split one cluster | |
3739 | * at a bucket boundary. So we take the last cluster of the existing | |
3740 | * extent and split it down the middle. We move the last half of the | |
3741 | * buckets in the last cluster of the existing extent over to the new | |
3742 | * extent. | |
01225596 | 3743 | * |
b5c03e74 JB |
3744 | * first_bh is the buffer at prev_blkno so we can update the existing |
3745 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3746 | * to insert our xattr. If the bucket move places the target in the new | |
3747 | * extent, we'll update first_bh and header_bh after modifying the old | |
3748 | * extent. | |
3749 | * | |
3750 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3751 | */ |
3752 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3753 | handle_t *handle, | |
41cb8148 JB |
3754 | struct ocfs2_xattr_bucket *first, |
3755 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3756 | u64 new_blkno, |
01225596 TM |
3757 | u32 num_clusters, |
3758 | u32 *first_hash) | |
3759 | { | |
c58b6032 | 3760 | int ret; |
41cb8148 JB |
3761 | struct super_block *sb = inode->i_sb; |
3762 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3763 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3764 | int to_move = num_buckets / 2; |
c58b6032 | 3765 | u64 src_blkno; |
41cb8148 JB |
3766 | u64 last_cluster_blkno = bucket_blkno(first) + |
3767 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3768 | |
41cb8148 JB |
3769 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3770 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3771 | |
01225596 | 3772 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3773 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3774 | |
41cb8148 | 3775 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3776 | last_cluster_blkno, new_blkno, |
3777 | to_move, first_hash); | |
01225596 TM |
3778 | if (ret) { |
3779 | mlog_errno(ret); | |
3780 | goto out; | |
3781 | } | |
3782 | ||
c58b6032 JB |
3783 | /* This is the first bucket that got moved */ |
3784 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3785 | |
b5c03e74 | 3786 | /* |
c58b6032 | 3787 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3788 | * update first and target. |
b5c03e74 | 3789 | */ |
41cb8148 | 3790 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3791 | /* Find the block for the new target bucket */ |
3792 | src_blkno = new_blkno + | |
41cb8148 JB |
3793 | (bucket_blkno(target) - src_blkno); |
3794 | ||
3795 | ocfs2_xattr_bucket_relse(first); | |
3796 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3797 | |
b5c03e74 | 3798 | /* |
c58b6032 | 3799 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3800 | * journal from ocfs2_cp_xattr_bucket(). |
3801 | */ | |
41cb8148 | 3802 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3803 | if (ret) { |
3804 | mlog_errno(ret); | |
3805 | goto out; | |
3806 | } | |
41cb8148 JB |
3807 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3808 | if (ret) | |
b5c03e74 | 3809 | mlog_errno(ret); |
01225596 | 3810 | |
01225596 TM |
3811 | } |
3812 | ||
01225596 | 3813 | out: |
01225596 TM |
3814 | return ret; |
3815 | } | |
3816 | ||
01225596 | 3817 | /* |
80bcaf34 TM |
3818 | * Find the suitable pos when we divide a bucket into 2. |
3819 | * We have to make sure the xattrs with the same hash value exist | |
3820 | * in the same bucket. | |
3821 | * | |
3822 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3823 | * place where the hash value changes. Try to find the most even split. | |
3824 | * The most common case is that all entries have different hash values, | |
3825 | * and the first check we make will find a place to split. | |
3826 | */ | |
3827 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3828 | { | |
3829 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3830 | int count = le16_to_cpu(xh->xh_count); | |
3831 | int delta, middle = count / 2; | |
3832 | ||
3833 | /* | |
3834 | * We start at the middle. Each step gets farther away in both | |
3835 | * directions. We therefore hit the change in hash value | |
3836 | * nearest to the middle. Note that this loop does not execute for | |
3837 | * count < 2. | |
3838 | */ | |
3839 | for (delta = 0; delta < middle; delta++) { | |
3840 | /* Let's check delta earlier than middle */ | |
3841 | if (cmp_xe(&entries[middle - delta - 1], | |
3842 | &entries[middle - delta])) | |
3843 | return middle - delta; | |
3844 | ||
3845 | /* For even counts, don't walk off the end */ | |
3846 | if ((middle + delta + 1) == count) | |
3847 | continue; | |
3848 | ||
3849 | /* Now try delta past middle */ | |
3850 | if (cmp_xe(&entries[middle + delta], | |
3851 | &entries[middle + delta + 1])) | |
3852 | return middle + delta + 1; | |
3853 | } | |
3854 | ||
3855 | /* Every entry had the same hash */ | |
3856 | return count; | |
3857 | } | |
3858 | ||
3859 | /* | |
3860 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3861 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3862 | * |
3863 | * Normally half of the xattrs will be moved. But we have to make | |
3864 | * sure that the xattrs with the same hash value are stored in the | |
3865 | * same bucket. If all the xattrs in this bucket have the same hash | |
3866 | * value, the new bucket will be initialized as an empty one and the | |
3867 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3868 | */ |
80bcaf34 TM |
3869 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3870 | handle_t *handle, | |
3871 | u64 blk, | |
3872 | u64 new_blk, | |
3873 | u32 *first_hash, | |
3874 | int new_bucket_head) | |
01225596 TM |
3875 | { |
3876 | int ret, i; | |
80bcaf34 | 3877 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3878 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3879 | struct ocfs2_xattr_header *xh; |
3880 | struct ocfs2_xattr_entry *xe; | |
3881 | int blocksize = inode->i_sb->s_blocksize; | |
3882 | ||
80bcaf34 | 3883 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3884 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3885 | |
ba937127 JB |
3886 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3887 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3888 | if (!s_bucket || !t_bucket) { | |
3889 | ret = -ENOMEM; | |
3890 | mlog_errno(ret); | |
3891 | goto out; | |
3892 | } | |
01225596 | 3893 | |
ba937127 | 3894 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3895 | if (ret) { |
3896 | mlog_errno(ret); | |
3897 | goto out; | |
3898 | } | |
3899 | ||
ba937127 | 3900 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3901 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3902 | if (ret) { |
3903 | mlog_errno(ret); | |
3904 | goto out; | |
3905 | } | |
3906 | ||
784b816a JB |
3907 | /* |
3908 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3909 | * there's no need to read it. | |
3910 | */ | |
ba937127 | 3911 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3912 | if (ret) { |
3913 | mlog_errno(ret); | |
3914 | goto out; | |
3915 | } | |
3916 | ||
2b656c1d JB |
3917 | /* |
3918 | * Hey, if we're overwriting t_bucket, what difference does | |
3919 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
3920 | * same part of ocfs2_cp_xattr_bucket(). | |
3921 | */ | |
ba937127 | 3922 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3923 | new_bucket_head ? |
3924 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3925 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3926 | if (ret) { | |
3927 | mlog_errno(ret); | |
3928 | goto out; | |
01225596 TM |
3929 | } |
3930 | ||
ba937127 | 3931 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3932 | count = le16_to_cpu(xh->xh_count); |
3933 | start = ocfs2_xattr_find_divide_pos(xh); | |
3934 | ||
3935 | if (start == count) { | |
3936 | xe = &xh->xh_entries[start-1]; | |
3937 | ||
3938 | /* | |
3939 | * initialized a new empty bucket here. | |
3940 | * The hash value is set as one larger than | |
3941 | * that of the last entry in the previous bucket. | |
3942 | */ | |
ba937127 JB |
3943 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3944 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3945 | |
ba937127 | 3946 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3947 | xh->xh_free_start = cpu_to_le16(blocksize); |
3948 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3949 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3950 | ||
3951 | goto set_num_buckets; | |
3952 | } | |
3953 | ||
01225596 | 3954 | /* copy the whole bucket to the new first. */ |
ba937127 | 3955 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3956 | |
3957 | /* update the new bucket. */ | |
ba937127 | 3958 | xh = bucket_xh(t_bucket); |
01225596 TM |
3959 | |
3960 | /* | |
3961 | * Calculate the total name/value len and xh_free_start for | |
3962 | * the old bucket first. | |
3963 | */ | |
3964 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3965 | name_value_len = 0; | |
3966 | for (i = 0; i < start; i++) { | |
3967 | xe = &xh->xh_entries[i]; | |
3968 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3969 | if (ocfs2_xattr_is_local(xe)) | |
3970 | xe_len += | |
3971 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3972 | else | |
3973 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3974 | name_value_len += xe_len; | |
3975 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3976 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3977 | } | |
3978 | ||
3979 | /* | |
3980 | * Now begin the modification to the new bucket. | |
3981 | * | |
3982 | * In the new bucket, We just move the xattr entry to the beginning | |
3983 | * and don't touch the name/value. So there will be some holes in the | |
3984 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3985 | * called. | |
3986 | */ | |
3987 | xe = &xh->xh_entries[start]; | |
3988 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3989 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3990 | (int)((char *)xe - (char *)xh), |
3991 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3992 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3993 | xe = &xh->xh_entries[count - start]; | |
3994 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3995 | memset((char *)xe, 0, len); | |
3996 | ||
3997 | le16_add_cpu(&xh->xh_count, -start); | |
3998 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3999 | ||
4000 | /* Calculate xh_free_start for the new bucket. */ | |
4001 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4002 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4003 | xe = &xh->xh_entries[i]; | |
4004 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4005 | if (ocfs2_xattr_is_local(xe)) | |
4006 | xe_len += | |
4007 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4008 | else | |
4009 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4010 | if (le16_to_cpu(xe->xe_name_offset) < | |
4011 | le16_to_cpu(xh->xh_free_start)) | |
4012 | xh->xh_free_start = xe->xe_name_offset; | |
4013 | } | |
4014 | ||
80bcaf34 | 4015 | set_num_buckets: |
01225596 TM |
4016 | /* set xh->xh_num_buckets for the new xh. */ |
4017 | if (new_bucket_head) | |
4018 | xh->xh_num_buckets = cpu_to_le16(1); | |
4019 | else | |
4020 | xh->xh_num_buckets = 0; | |
4021 | ||
ba937127 | 4022 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4023 | |
4024 | /* store the first_hash of the new bucket. */ | |
4025 | if (first_hash) | |
4026 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4027 | ||
4028 | /* | |
80bcaf34 TM |
4029 | * Now only update the 1st block of the old bucket. If we |
4030 | * just added a new empty bucket, there is no need to modify | |
4031 | * it. | |
01225596 | 4032 | */ |
80bcaf34 TM |
4033 | if (start == count) |
4034 | goto out; | |
4035 | ||
ba937127 | 4036 | xh = bucket_xh(s_bucket); |
01225596 TM |
4037 | memset(&xh->xh_entries[start], 0, |
4038 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4039 | xh->xh_count = cpu_to_le16(start); | |
4040 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4041 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4042 | ||
ba937127 | 4043 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4044 | |
4045 | out: | |
ba937127 JB |
4046 | ocfs2_xattr_bucket_free(s_bucket); |
4047 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4048 | |
4049 | return ret; | |
4050 | } | |
4051 | ||
4052 | /* | |
4053 | * Copy xattr from one bucket to another bucket. | |
4054 | * | |
4055 | * The caller must make sure that the journal transaction | |
4056 | * has enough space for journaling. | |
4057 | */ | |
4058 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4059 | handle_t *handle, | |
4060 | u64 s_blkno, | |
4061 | u64 t_blkno, | |
4062 | int t_is_new) | |
4063 | { | |
4980c6da | 4064 | int ret; |
ba937127 | 4065 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4066 | |
4067 | BUG_ON(s_blkno == t_blkno); | |
4068 | ||
4069 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
4070 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
4071 | t_is_new); | |
01225596 | 4072 | |
ba937127 JB |
4073 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4074 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4075 | if (!s_bucket || !t_bucket) { | |
4076 | ret = -ENOMEM; | |
4077 | mlog_errno(ret); | |
4078 | goto out; | |
4079 | } | |
92de109a | 4080 | |
ba937127 | 4081 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4082 | if (ret) |
4083 | goto out; | |
4084 | ||
784b816a JB |
4085 | /* |
4086 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4087 | * there's no need to read it. | |
4088 | */ | |
ba937127 | 4089 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
4090 | if (ret) |
4091 | goto out; | |
4092 | ||
2b656c1d JB |
4093 | /* |
4094 | * Hey, if we're overwriting t_bucket, what difference does | |
4095 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4096 | * cluster to fill, we came here from |
4097 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4098 | * ACCESS_CREATE is required. But we also might have moved data | |
4099 | * out of t_bucket before extending back into it. | |
4100 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4101 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4102 | * and copied out the end of the old extent. Then it re-extends |
4103 | * the old extent back to create space for new xattrs. That's | |
4104 | * how we get here, and the bucket isn't really new. | |
4105 | */ | |
ba937127 | 4106 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4107 | t_is_new ? |
4108 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4109 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4110 | if (ret) | |
4111 | goto out; | |
01225596 | 4112 | |
ba937127 JB |
4113 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4114 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4115 | |
4116 | out: | |
ba937127 JB |
4117 | ocfs2_xattr_bucket_free(t_bucket); |
4118 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4119 | |
4120 | return ret; | |
4121 | } | |
4122 | ||
4123 | /* | |
874d65af JB |
4124 | * src_blk points to the start of an existing extent. last_blk points to |
4125 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4126 | * extent. We copy the buckets from the cluster at last_blk to the new |
4127 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4128 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4129 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4130 | * by the same amount. | |
01225596 | 4131 | */ |
54ecb6b6 JB |
4132 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4133 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4134 | unsigned int start_bucket, | |
4135 | u32 *first_hash) | |
01225596 TM |
4136 | { |
4137 | int i, ret, credits; | |
4138 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4139 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4140 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4141 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4142 | |
874d65af JB |
4143 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4144 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4145 | |
54ecb6b6 JB |
4146 | BUG_ON(start_bucket >= num_buckets); |
4147 | if (start_bucket) { | |
4148 | num_buckets -= start_bucket; | |
4149 | last_blk += (start_bucket * blks_per_bucket); | |
4150 | } | |
4151 | ||
15d60929 JB |
4152 | /* The first bucket of the original extent */ |
4153 | old_first = ocfs2_xattr_bucket_new(inode); | |
4154 | /* The first bucket of the new extent */ | |
4155 | new_first = ocfs2_xattr_bucket_new(inode); | |
4156 | if (!old_first || !new_first) { | |
4157 | ret = -ENOMEM; | |
4158 | mlog_errno(ret); | |
4159 | goto out; | |
4160 | } | |
4161 | ||
874d65af | 4162 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4163 | if (ret) { |
4164 | mlog_errno(ret); | |
4165 | goto out; | |
4166 | } | |
4167 | ||
01225596 | 4168 | /* |
54ecb6b6 JB |
4169 | * We need to update the first bucket of the old extent and all |
4170 | * the buckets going to the new extent. | |
01225596 | 4171 | */ |
54ecb6b6 JB |
4172 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4173 | handle->h_buffer_credits; | |
01225596 TM |
4174 | ret = ocfs2_extend_trans(handle, credits); |
4175 | if (ret) { | |
4176 | mlog_errno(ret); | |
4177 | goto out; | |
4178 | } | |
4179 | ||
15d60929 JB |
4180 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4181 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4182 | if (ret) { |
4183 | mlog_errno(ret); | |
4184 | goto out; | |
4185 | } | |
4186 | ||
4187 | for (i = 0; i < num_buckets; i++) { | |
4188 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4189 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4190 | to_blk + (i * blks_per_bucket), |
4191 | 1); | |
01225596 TM |
4192 | if (ret) { |
4193 | mlog_errno(ret); | |
4194 | goto out; | |
4195 | } | |
01225596 TM |
4196 | } |
4197 | ||
15d60929 JB |
4198 | /* |
4199 | * Get the new bucket ready before we dirty anything | |
4200 | * (This actually shouldn't fail, because we already dirtied | |
4201 | * it once in ocfs2_cp_xattr_bucket()). | |
4202 | */ | |
4203 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4204 | if (ret) { | |
01225596 TM |
4205 | mlog_errno(ret); |
4206 | goto out; | |
4207 | } | |
15d60929 JB |
4208 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4209 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4210 | if (ret) { |
4211 | mlog_errno(ret); | |
4212 | goto out; | |
4213 | } | |
4214 | ||
15d60929 JB |
4215 | /* Now update the headers */ |
4216 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4217 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4218 | |
15d60929 JB |
4219 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4220 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4221 | |
4222 | if (first_hash) | |
15d60929 JB |
4223 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4224 | ||
01225596 | 4225 | out: |
15d60929 JB |
4226 | ocfs2_xattr_bucket_free(new_first); |
4227 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4228 | return ret; |
4229 | } | |
4230 | ||
4231 | /* | |
80bcaf34 | 4232 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4233 | * This function should only be called when bucket size == cluster size. |
4234 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4235 | */ | |
80bcaf34 TM |
4236 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4237 | handle_t *handle, | |
4238 | u64 prev_blk, | |
4239 | u64 new_blk, | |
4240 | u32 *first_hash) | |
01225596 TM |
4241 | { |
4242 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4243 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4244 | |
4245 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4246 | ||
4247 | ret = ocfs2_extend_trans(handle, credits); | |
4248 | if (ret) { | |
4249 | mlog_errno(ret); | |
4250 | return ret; | |
4251 | } | |
4252 | ||
4253 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4254 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4255 | new_blk, first_hash, 1); | |
01225596 TM |
4256 | } |
4257 | ||
4258 | /* | |
4259 | * Move some xattrs from the old cluster to the new one since they are not | |
4260 | * contiguous in ocfs2 xattr tree. | |
4261 | * | |
4262 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4263 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4264 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4265 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4266 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4267 | * to extend the insert bucket. | |
4268 | * | |
4269 | * The problem is how much xattr should we move to the new one and when should | |
4270 | * we update first_bh and header_bh? | |
4271 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4272 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4273 | * update the first_bh and header_bh if the insert bucket has been moved | |
4274 | * to the new cluster. | |
4275 | * 2. If cluster_size == bucket_size: | |
4276 | * a) If the previous extent rec has more than one cluster and the insert | |
4277 | * place isn't in the last cluster, copy the entire last cluster to the | |
4278 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4279 | * since they will not be moved into the new cluster. | |
4280 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4281 | * the new one. And we set the extend flag to zero if the insert place is | |
4282 | * moved into the new allocated cluster since no extend is needed. | |
4283 | */ | |
4284 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4285 | handle_t *handle, | |
012ee910 JB |
4286 | struct ocfs2_xattr_bucket *first, |
4287 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4288 | u64 new_blk, |
01225596 TM |
4289 | u32 prev_clusters, |
4290 | u32 *v_start, | |
4291 | int *extend) | |
4292 | { | |
92cf3adf | 4293 | int ret; |
01225596 TM |
4294 | |
4295 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4296 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4297 | (unsigned long long)new_blk); |
01225596 | 4298 | |
41cb8148 | 4299 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4300 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4301 | handle, | |
41cb8148 | 4302 | first, target, |
01225596 | 4303 | new_blk, |
01225596 TM |
4304 | prev_clusters, |
4305 | v_start); | |
012ee910 | 4306 | if (ret) |
41cb8148 | 4307 | mlog_errno(ret); |
41cb8148 | 4308 | } else { |
92cf3adf JB |
4309 | /* The start of the last cluster in the first extent */ |
4310 | u64 last_blk = bucket_blkno(first) + | |
4311 | ((prev_clusters - 1) * | |
4312 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4313 | |
012ee910 | 4314 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4315 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4316 | bucket_blkno(first), |
54ecb6b6 | 4317 | last_blk, new_blk, 0, |
01225596 | 4318 | v_start); |
012ee910 JB |
4319 | if (ret) |
4320 | mlog_errno(ret); | |
4321 | } else { | |
80bcaf34 TM |
4322 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4323 | last_blk, new_blk, | |
4324 | v_start); | |
012ee910 JB |
4325 | if (ret) |
4326 | mlog_errno(ret); | |
01225596 | 4327 | |
92cf3adf | 4328 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4329 | *extend = 0; |
4330 | } | |
4331 | } | |
4332 | ||
4333 | return ret; | |
4334 | } | |
4335 | ||
4336 | /* | |
4337 | * Add a new cluster for xattr storage. | |
4338 | * | |
4339 | * If the new cluster is contiguous with the previous one, it will be | |
4340 | * appended to the same extent record, and num_clusters will be updated. | |
4341 | * If not, we will insert a new extent for it and move some xattrs in | |
4342 | * the last cluster into the new allocated one. | |
4343 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4344 | * lose the benefits of hashing because we'll have to search large leaves. | |
4345 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4346 | * if it's bigger). | |
4347 | * | |
4348 | * first_bh is the first block of the previous extent rec and header_bh | |
4349 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4350 | * when the header_bh is moved into the new cluster. | |
4351 | */ | |
4352 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4353 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4354 | struct ocfs2_xattr_bucket *first, |
4355 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4356 | u32 *num_clusters, |
4357 | u32 prev_cpos, | |
78f30c31 TM |
4358 | int *extend, |
4359 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4360 | { |
85db90e7 | 4361 | int ret; |
01225596 TM |
4362 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4363 | u32 prev_clusters = *num_clusters; | |
4364 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4365 | u64 block; | |
85db90e7 | 4366 | handle_t *handle = ctxt->handle; |
01225596 | 4367 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4368 | struct ocfs2_extent_tree et; |
01225596 TM |
4369 | |
4370 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4371 | "previous xattr blkno = %llu\n", | |
4372 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4373 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4374 | |
5e404e9e | 4375 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 4376 | |
0cf2f763 | 4377 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4378 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4379 | if (ret < 0) { |
4380 | mlog_errno(ret); | |
4381 | goto leave; | |
4382 | } | |
4383 | ||
78f30c31 | 4384 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4385 | clusters_to_add, &bit_off, &num_bits); |
4386 | if (ret < 0) { | |
4387 | if (ret != -ENOSPC) | |
4388 | mlog_errno(ret); | |
4389 | goto leave; | |
4390 | } | |
4391 | ||
4392 | BUG_ON(num_bits > clusters_to_add); | |
4393 | ||
4394 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4395 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4396 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4397 | ||
ed29c0ca | 4398 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4399 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4400 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4401 | /* | |
4402 | * If this cluster is contiguous with the old one and | |
4403 | * adding this new cluster, we don't surpass the limit of | |
4404 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4405 | * initialized and used like other buckets in the previous | |
4406 | * cluster. | |
4407 | * So add it as a contiguous one. The caller will handle | |
4408 | * its init process. | |
4409 | */ | |
4410 | v_start = prev_cpos + prev_clusters; | |
4411 | *num_clusters = prev_clusters + num_bits; | |
4412 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4413 | num_bits); | |
4414 | } else { | |
4415 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4416 | handle, | |
012ee910 JB |
4417 | first, |
4418 | target, | |
01225596 | 4419 | block, |
01225596 TM |
4420 | prev_clusters, |
4421 | &v_start, | |
4422 | extend); | |
4423 | if (ret) { | |
4424 | mlog_errno(ret); | |
4425 | goto leave; | |
4426 | } | |
4427 | } | |
4428 | ||
4429 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4430 | num_bits, (unsigned long long)block, v_start); |
cc79d8c1 | 4431 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 4432 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4433 | if (ret < 0) { |
4434 | mlog_errno(ret); | |
4435 | goto leave; | |
4436 | } | |
4437 | ||
4438 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4439 | if (ret < 0) |
01225596 | 4440 | mlog_errno(ret); |
01225596 TM |
4441 | |
4442 | leave: | |
01225596 TM |
4443 | return ret; |
4444 | } | |
4445 | ||
4446 | /* | |
92de109a JB |
4447 | * We are given an extent. 'first' is the bucket at the very front of |
4448 | * the extent. The extent has space for an additional bucket past | |
4449 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4450 | * of the target bucket. We wish to shift every bucket past the target | |
4451 | * down one, filling in that additional space. When we get back to the | |
4452 | * target, we split the target between itself and the now-empty bucket | |
4453 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4454 | */ |
4455 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4456 | handle_t *handle, |
92de109a JB |
4457 | struct ocfs2_xattr_bucket *first, |
4458 | u64 target_blk, | |
01225596 TM |
4459 | u32 num_clusters) |
4460 | { | |
4461 | int ret, credits; | |
4462 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4463 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4464 | u64 end_blk; |
4465 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4466 | |
4467 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4468 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4469 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4470 | |
92de109a JB |
4471 | /* The extent must have room for an additional bucket */ |
4472 | BUG_ON(new_bucket >= | |
4473 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4474 | |
92de109a JB |
4475 | /* end_blk points to the last existing bucket */ |
4476 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4477 | |
4478 | /* | |
92de109a JB |
4479 | * end_blk is the start of the last existing bucket. |
4480 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4481 | * every bucket after it up to, but not including, the last | |
4482 | * existing bucket. Then we add the last existing bucket, the | |
4483 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4484 | */ |
92de109a | 4485 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4486 | handle->h_buffer_credits; |
4487 | ret = ocfs2_extend_trans(handle, credits); | |
4488 | if (ret) { | |
01225596 TM |
4489 | mlog_errno(ret); |
4490 | goto out; | |
4491 | } | |
4492 | ||
92de109a JB |
4493 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4494 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4495 | if (ret) { |
4496 | mlog_errno(ret); | |
85db90e7 | 4497 | goto out; |
01225596 TM |
4498 | } |
4499 | ||
92de109a | 4500 | while (end_blk != target_blk) { |
01225596 TM |
4501 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4502 | end_blk + blk_per_bucket, 0); | |
4503 | if (ret) | |
85db90e7 | 4504 | goto out; |
01225596 TM |
4505 | end_blk -= blk_per_bucket; |
4506 | } | |
4507 | ||
92de109a JB |
4508 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4509 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4510 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4511 | |
92de109a JB |
4512 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4513 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4514 | |
01225596 TM |
4515 | out: |
4516 | return ret; | |
4517 | } | |
4518 | ||
4519 | /* | |
91f2033f JB |
4520 | * Add new xattr bucket in an extent record and adjust the buckets |
4521 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4522 | * bucket we want to insert into. | |
01225596 | 4523 | * |
91f2033f JB |
4524 | * In the easy case, we will move all the buckets after target down by |
4525 | * one. Half of target's xattrs will be moved to the next bucket. | |
4526 | * | |
4527 | * If current cluster is full, we'll allocate a new one. This may not | |
4528 | * be contiguous. The underlying calls will make sure that there is | |
4529 | * space for the insert, shifting buckets around if necessary. | |
4530 | * 'target' may be moved by those calls. | |
01225596 TM |
4531 | */ |
4532 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4533 | struct buffer_head *xb_bh, | |
91f2033f | 4534 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4535 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4536 | { |
01225596 TM |
4537 | struct ocfs2_xattr_block *xb = |
4538 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4539 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4540 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4541 | u32 name_hash = |
4542 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4543 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4544 | int ret, num_buckets, extend = 1; |
4545 | u64 p_blkno; | |
4546 | u32 e_cpos, num_clusters; | |
92de109a | 4547 | /* The bucket at the front of the extent */ |
91f2033f | 4548 | struct ocfs2_xattr_bucket *first; |
01225596 | 4549 | |
91f2033f JB |
4550 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4551 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4552 | |
ed29c0ca | 4553 | /* The first bucket of the original extent */ |
92de109a | 4554 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4555 | if (!first) { |
92de109a JB |
4556 | ret = -ENOMEM; |
4557 | mlog_errno(ret); | |
4558 | goto out; | |
4559 | } | |
4560 | ||
01225596 TM |
4561 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4562 | &num_clusters, el); | |
4563 | if (ret) { | |
4564 | mlog_errno(ret); | |
4565 | goto out; | |
4566 | } | |
4567 | ||
ed29c0ca | 4568 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4569 | if (ret) { |
4570 | mlog_errno(ret); | |
4571 | goto out; | |
4572 | } | |
4573 | ||
ed29c0ca JB |
4574 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4575 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4576 | /* | |
4577 | * This can move first+target if the target bucket moves | |
4578 | * to the new extent. | |
4579 | */ | |
01225596 TM |
4580 | ret = ocfs2_add_new_xattr_cluster(inode, |
4581 | xb_bh, | |
ed29c0ca JB |
4582 | first, |
4583 | target, | |
01225596 TM |
4584 | &num_clusters, |
4585 | e_cpos, | |
78f30c31 TM |
4586 | &extend, |
4587 | ctxt); | |
01225596 TM |
4588 | if (ret) { |
4589 | mlog_errno(ret); | |
4590 | goto out; | |
4591 | } | |
4592 | } | |
4593 | ||
92de109a | 4594 | if (extend) { |
01225596 | 4595 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4596 | ctxt->handle, |
ed29c0ca JB |
4597 | first, |
4598 | bucket_blkno(target), | |
01225596 | 4599 | num_clusters); |
92de109a JB |
4600 | if (ret) |
4601 | mlog_errno(ret); | |
4602 | } | |
4603 | ||
01225596 | 4604 | out: |
92de109a | 4605 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4606 | |
01225596 TM |
4607 | return ret; |
4608 | } | |
4609 | ||
4610 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4611 | struct ocfs2_xattr_bucket *bucket, | |
4612 | int offs) | |
4613 | { | |
4614 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4615 | ||
4616 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4617 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4618 | } |
4619 | ||
4620 | /* | |
4621 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4622 | * |
4623 | * Note: "local" indicates the real data's locality. So we can't | |
4624 | * just its bucket locality by its length. | |
4625 | */ | |
4626 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4627 | struct ocfs2_xattr_info *xi, | |
4628 | struct ocfs2_xattr_search *xs, | |
4629 | u32 name_hash, | |
5a095611 | 4630 | int local) |
01225596 TM |
4631 | { |
4632 | struct ocfs2_xattr_entry *last, *xe; | |
4633 | int name_len = strlen(xi->name); | |
4634 | struct ocfs2_xattr_header *xh = xs->header; | |
4635 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4636 | size_t blocksize = inode->i_sb->s_blocksize; | |
4637 | char *val; | |
4638 | size_t offs, size, new_size; | |
4639 | ||
4640 | last = &xh->xh_entries[count]; | |
4641 | if (!xs->not_found) { | |
4642 | xe = xs->here; | |
4643 | offs = le16_to_cpu(xe->xe_name_offset); | |
4644 | if (ocfs2_xattr_is_local(xe)) | |
4645 | size = OCFS2_XATTR_SIZE(name_len) + | |
4646 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4647 | else | |
4648 | size = OCFS2_XATTR_SIZE(name_len) + | |
4649 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4650 | ||
4651 | /* | |
4652 | * If the new value will be stored outside, xi->value has been | |
4653 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4654 | * goes with xi->value_len, so we can set new_size safely here. | |
4655 | * See ocfs2_xattr_set_in_bucket. | |
4656 | */ | |
4657 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4658 | OCFS2_XATTR_SIZE(xi->value_len); | |
4659 | ||
4660 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4661 | if (xi->value) { | |
4662 | if (new_size > size) | |
4663 | goto set_new_name_value; | |
4664 | ||
4665 | /* Now replace the old value with new one. */ | |
4666 | if (local) | |
4667 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4668 | else | |
4669 | xe->xe_value_size = 0; | |
4670 | ||
4671 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4672 | xs->bucket, offs); |
01225596 TM |
4673 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4674 | size - OCFS2_XATTR_SIZE(name_len)); | |
4675 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4676 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4677 | xi->value, xi->value_len); | |
4678 | ||
4679 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4680 | ocfs2_xattr_set_local(xe, local); | |
4681 | return; | |
4682 | } else { | |
5a095611 TM |
4683 | /* |
4684 | * Remove the old entry if there is more than one. | |
4685 | * We don't remove the last entry so that we can | |
4686 | * use it to indicate the hash value of the empty | |
4687 | * bucket. | |
4688 | */ | |
01225596 | 4689 | last -= 1; |
01225596 | 4690 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4691 | if (xh->xh_count) { |
4692 | memmove(xe, xe + 1, | |
4693 | (void *)last - (void *)xe); | |
4694 | memset(last, 0, | |
4695 | sizeof(struct ocfs2_xattr_entry)); | |
4696 | } else | |
4697 | xh->xh_free_start = | |
4698 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4699 | ||
01225596 TM |
4700 | return; |
4701 | } | |
4702 | } else { | |
4703 | /* find a new entry for insert. */ | |
4704 | int low = 0, high = count - 1, tmp; | |
4705 | struct ocfs2_xattr_entry *tmp_xe; | |
4706 | ||
5a095611 | 4707 | while (low <= high && count) { |
01225596 TM |
4708 | tmp = (low + high) / 2; |
4709 | tmp_xe = &xh->xh_entries[tmp]; | |
4710 | ||
4711 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4712 | low = tmp + 1; | |
4713 | else if (name_hash < | |
4714 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4715 | high = tmp - 1; | |
06b240d8 TM |
4716 | else { |
4717 | low = tmp; | |
01225596 | 4718 | break; |
06b240d8 | 4719 | } |
01225596 TM |
4720 | } |
4721 | ||
4722 | xe = &xh->xh_entries[low]; | |
4723 | if (low != count) | |
4724 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4725 | ||
4726 | le16_add_cpu(&xh->xh_count, 1); | |
4727 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4728 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4729 | xe->xe_name_len = name_len; | |
4730 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4731 | } | |
4732 | ||
4733 | set_new_name_value: | |
4734 | /* Insert the new name+value. */ | |
4735 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4736 | ||
4737 | /* | |
4738 | * We must make sure that the name/value pair | |
4739 | * exists in the same block. | |
4740 | */ | |
4741 | offs = le16_to_cpu(xh->xh_free_start); | |
4742 | start = offs - size; | |
4743 | ||
4744 | if (start >> inode->i_sb->s_blocksize_bits != | |
4745 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4746 | offs = offs - offs % blocksize; | |
4747 | xh->xh_free_start = cpu_to_le16(offs); | |
4748 | } | |
4749 | ||
ba937127 | 4750 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4751 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4752 | ||
4753 | memset(val, 0, size); | |
4754 | memcpy(val, xi->name, name_len); | |
4755 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4756 | ||
4757 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4758 | ocfs2_xattr_set_local(xe, local); | |
4759 | xs->here = xe; | |
4760 | le16_add_cpu(&xh->xh_free_start, -size); | |
4761 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4762 | ||
4763 | return; | |
4764 | } | |
4765 | ||
01225596 TM |
4766 | /* |
4767 | * Set the xattr entry in the specified bucket. | |
4768 | * The bucket is indicated by xs->bucket and it should have the enough | |
4769 | * space for the xattr insertion. | |
4770 | */ | |
4771 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4772 | handle_t *handle, |
01225596 TM |
4773 | struct ocfs2_xattr_info *xi, |
4774 | struct ocfs2_xattr_search *xs, | |
4775 | u32 name_hash, | |
5a095611 | 4776 | int local) |
01225596 | 4777 | { |
1224be02 | 4778 | int ret; |
02dbf38d | 4779 | u64 blkno; |
01225596 | 4780 | |
ff1ec20e MF |
4781 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4782 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4783 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4784 | |
ba937127 | 4785 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4786 | blkno = bucket_blkno(xs->bucket); |
4787 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4788 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4789 | if (ret) { |
4790 | mlog_errno(ret); | |
4791 | goto out; | |
4792 | } | |
4793 | } | |
4794 | ||
ba937127 | 4795 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4796 | OCFS2_JOURNAL_ACCESS_WRITE); |
4797 | if (ret < 0) { | |
4798 | mlog_errno(ret); | |
4799 | goto out; | |
01225596 TM |
4800 | } |
4801 | ||
5a095611 | 4802 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4803 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4804 | |
01225596 | 4805 | out: |
01225596 TM |
4806 | return ret; |
4807 | } | |
4808 | ||
01225596 TM |
4809 | /* |
4810 | * Truncate the specified xe_off entry in xattr bucket. | |
4811 | * bucket is indicated by header_bh and len is the new length. | |
4812 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4813 | * | |
4814 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4815 | */ | |
4816 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4817 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4818 | int xe_off, |
78f30c31 TM |
4819 | int len, |
4820 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4821 | { |
4822 | int ret, offset; | |
4823 | u64 value_blk; | |
01225596 | 4824 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4825 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4826 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4827 | struct ocfs2_xattr_value_buf vb = { |
4828 | .vb_access = ocfs2_journal_access, | |
4829 | }; | |
01225596 TM |
4830 | |
4831 | xe = &xh->xh_entries[xe_off]; | |
4832 | ||
4833 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4834 | ||
4835 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4836 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4837 | ||
4838 | value_blk = offset / blocksize; | |
4839 | ||
4840 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4841 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4842 | |
b3e5d379 JB |
4843 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4844 | BUG_ON(!vb.vb_bh); | |
01225596 | 4845 | |
b3e5d379 JB |
4846 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4847 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4848 | |
548b0f22 JB |
4849 | /* |
4850 | * From here on out we have to dirty the bucket. The generic | |
4851 | * value calls only modify one of the bucket's bhs, but we need | |
4852 | * to send the bucket at once. So if they error, they *could* have | |
4853 | * modified something. We have to assume they did, and dirty | |
4854 | * the whole bucket. This leaves us in a consistent state. | |
4855 | */ | |
4856 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4857 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4858 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4859 | if (ret) { |
4860 | mlog_errno(ret); | |
554e7f9e TM |
4861 | goto out; |
4862 | } | |
4863 | ||
4864 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
4865 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4866 | if (ret) { | |
4867 | mlog_errno(ret); | |
4868 | goto out; | |
01225596 TM |
4869 | } |
4870 | ||
548b0f22 JB |
4871 | xe->xe_value_size = cpu_to_le64(len); |
4872 | ||
548b0f22 JB |
4873 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
4874 | ||
01225596 | 4875 | out: |
01225596 TM |
4876 | return ret; |
4877 | } | |
4878 | ||
4879 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4880 | struct ocfs2_xattr_search *xs, |
4881 | int len, | |
4882 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4883 | { |
4884 | int ret, offset; | |
4885 | struct ocfs2_xattr_entry *xe = xs->here; | |
4886 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4887 | ||
ba937127 | 4888 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4889 | |
4890 | offset = xe - xh->xh_entries; | |
548b0f22 | 4891 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 4892 | offset, len, ctxt); |
01225596 TM |
4893 | if (ret) |
4894 | mlog_errno(ret); | |
4895 | ||
4896 | return ret; | |
4897 | } | |
4898 | ||
4899 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4900 | handle_t *handle, |
01225596 TM |
4901 | struct ocfs2_xattr_search *xs, |
4902 | char *val, | |
4903 | int value_len) | |
4904 | { | |
712e53e4 | 4905 | int ret, offset, block_off; |
01225596 TM |
4906 | struct ocfs2_xattr_value_root *xv; |
4907 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
4908 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
4909 | void *base; | |
492a8a33 TM |
4910 | struct ocfs2_xattr_value_buf vb = { |
4911 | .vb_access = ocfs2_journal_access, | |
4912 | }; | |
01225596 TM |
4913 | |
4914 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4915 | ||
fd68a894 | 4916 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, xh, |
712e53e4 TM |
4917 | xe - xh->xh_entries, |
4918 | &block_off, | |
4919 | &offset); | |
4920 | if (ret) { | |
4921 | mlog_errno(ret); | |
4922 | goto out; | |
4923 | } | |
01225596 | 4924 | |
712e53e4 TM |
4925 | base = bucket_block(xs->bucket, block_off); |
4926 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
4927 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 4928 | |
492a8a33 TM |
4929 | vb.vb_xv = xv; |
4930 | vb.vb_bh = xs->bucket->bu_bhs[block_off]; | |
712e53e4 | 4931 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
492a8a33 | 4932 | &vb, val, value_len); |
712e53e4 TM |
4933 | if (ret) |
4934 | mlog_errno(ret); | |
4935 | out: | |
4936 | return ret; | |
01225596 TM |
4937 | } |
4938 | ||
01225596 TM |
4939 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4940 | struct buffer_head *root_bh, | |
4941 | u64 blkno, | |
4942 | u32 cpos, | |
47bca495 TM |
4943 | u32 len, |
4944 | void *para) | |
01225596 TM |
4945 | { |
4946 | int ret; | |
4947 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4948 | struct inode *tl_inode = osb->osb_tl_inode; | |
4949 | handle_t *handle; | |
4950 | struct ocfs2_xattr_block *xb = | |
4951 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4952 | struct ocfs2_alloc_context *meta_ac = NULL; |
4953 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4954 | struct ocfs2_extent_tree et; |
4955 | ||
47bca495 TM |
4956 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
4957 | ocfs2_delete_xattr_in_bucket, NULL); | |
4958 | if (ret) { | |
4959 | mlog_errno(ret); | |
4960 | return ret; | |
4961 | } | |
4962 | ||
5e404e9e | 4963 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
4964 | |
4965 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4966 | ||
4967 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4968 | cpos, len, (unsigned long long)blkno); | |
4969 | ||
8cb471e8 JB |
4970 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
4971 | len); | |
01225596 | 4972 | |
f99b9b7c | 4973 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4974 | if (ret) { |
4975 | mlog_errno(ret); | |
4976 | return ret; | |
4977 | } | |
4978 | ||
4979 | mutex_lock(&tl_inode->i_mutex); | |
4980 | ||
4981 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4982 | ret = __ocfs2_flush_truncate_log(osb); | |
4983 | if (ret < 0) { | |
4984 | mlog_errno(ret); | |
4985 | goto out; | |
4986 | } | |
4987 | } | |
4988 | ||
a90714c1 | 4989 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 4990 | if (IS_ERR(handle)) { |
01225596 TM |
4991 | ret = -ENOMEM; |
4992 | mlog_errno(ret); | |
4993 | goto out; | |
4994 | } | |
4995 | ||
0cf2f763 | 4996 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4997 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4998 | if (ret) { |
4999 | mlog_errno(ret); | |
5000 | goto out_commit; | |
5001 | } | |
5002 | ||
dbdcf6a4 | 5003 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5004 | &dealloc); |
01225596 TM |
5005 | if (ret) { |
5006 | mlog_errno(ret); | |
5007 | goto out_commit; | |
5008 | } | |
5009 | ||
5010 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
5011 | ||
5012 | ret = ocfs2_journal_dirty(handle, root_bh); | |
5013 | if (ret) { | |
5014 | mlog_errno(ret); | |
5015 | goto out_commit; | |
5016 | } | |
5017 | ||
5018 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5019 | if (ret) | |
5020 | mlog_errno(ret); | |
5021 | ||
5022 | out_commit: | |
5023 | ocfs2_commit_trans(osb, handle); | |
5024 | out: | |
5025 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5026 | ||
5027 | mutex_unlock(&tl_inode->i_mutex); | |
5028 | ||
5029 | if (meta_ac) | |
5030 | ocfs2_free_alloc_context(meta_ac); | |
5031 | ||
5032 | ocfs2_run_deallocs(osb, &dealloc); | |
5033 | ||
5034 | return ret; | |
5035 | } | |
5036 | ||
01225596 | 5037 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 5038 | handle_t *handle, |
01225596 TM |
5039 | struct ocfs2_xattr_search *xs) |
5040 | { | |
ba937127 | 5041 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
5042 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
5043 | le16_to_cpu(xh->xh_count) - 1]; | |
5044 | int ret = 0; | |
5045 | ||
ba937127 | 5046 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 5047 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5048 | if (ret) { |
5049 | mlog_errno(ret); | |
85db90e7 | 5050 | return; |
01225596 TM |
5051 | } |
5052 | ||
5053 | /* Remove the old entry. */ | |
5054 | memmove(xs->here, xs->here + 1, | |
5055 | (void *)last - (void *)xs->here); | |
5056 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
5057 | le16_add_cpu(&xh->xh_count, -1); | |
5058 | ||
ba937127 | 5059 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
5060 | } |
5061 | ||
5062 | /* | |
5063 | * Set the xattr name/value in the bucket specified in xs. | |
5064 | * | |
5065 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
5066 | * we divide the whole process into 3 steps: | |
5067 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
5068 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
5069 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
5070 | * 4. If the clusters for the new outside value can't be allocated, we need | |
5071 | * to free the xattr we allocated in set. | |
5072 | */ | |
5073 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
5074 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5075 | struct ocfs2_xattr_search *xs, |
5076 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5077 | { |
5a095611 | 5078 | int ret, local = 1; |
01225596 TM |
5079 | size_t value_len; |
5080 | char *val = (char *)xi->value; | |
5081 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
5082 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
5083 | strlen(xi->name)); | |
01225596 TM |
5084 | |
5085 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
5086 | /* | |
5087 | * We need to truncate the xattr storage first. | |
5088 | * | |
5089 | * If both the old and new value are stored to | |
5090 | * outside block, we only need to truncate | |
5091 | * the storage and then set the value outside. | |
5092 | * | |
5093 | * If the new value should be stored within block, | |
5094 | * we should free all the outside block first and | |
5095 | * the modification to the xattr block will be done | |
5096 | * by following steps. | |
5097 | */ | |
5098 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5099 | value_len = xi->value_len; | |
5100 | else | |
5101 | value_len = 0; | |
5102 | ||
5103 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
5104 | value_len, |
5105 | ctxt); | |
01225596 TM |
5106 | if (ret) |
5107 | goto out; | |
5108 | ||
5109 | if (value_len) | |
5110 | goto set_value_outside; | |
5111 | } | |
5112 | ||
5113 | value_len = xi->value_len; | |
5114 | /* So we have to handle the inside block change now. */ | |
5115 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
5116 | /* | |
5117 | * If the new value will be stored outside of block, | |
5118 | * initalize a new empty value root and insert it first. | |
5119 | */ | |
5120 | local = 0; | |
5121 | xi->value = &def_xv; | |
5122 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
5123 | } | |
5124 | ||
85db90e7 TM |
5125 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5126 | name_hash, local); | |
01225596 TM |
5127 | if (ret) { |
5128 | mlog_errno(ret); | |
5129 | goto out; | |
5130 | } | |
5131 | ||
5a095611 TM |
5132 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5133 | goto out; | |
01225596 | 5134 | |
5a095611 TM |
5135 | /* allocate the space now for the outside block storage. */ |
5136 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5137 | value_len, ctxt); |
5a095611 TM |
5138 | if (ret) { |
5139 | mlog_errno(ret); | |
5140 | ||
5141 | if (xs->not_found) { | |
5142 | /* | |
5143 | * We can't allocate enough clusters for outside | |
5144 | * storage and we have allocated xattr already, | |
5145 | * so need to remove it. | |
5146 | */ | |
85db90e7 | 5147 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5148 | } |
01225596 TM |
5149 | goto out; |
5150 | } | |
5151 | ||
5152 | set_value_outside: | |
85db90e7 TM |
5153 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5154 | xs, val, value_len); | |
01225596 TM |
5155 | out: |
5156 | return ret; | |
5157 | } | |
5158 | ||
80bcaf34 TM |
5159 | /* |
5160 | * check whether the xattr bucket is filled up with the same hash value. | |
5161 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5162 | * If we want to insert a xattr with different hash value, go ahead | |
5163 | * and ocfs2_divide_xattr_bucket will handle this. | |
5164 | */ | |
01225596 | 5165 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5166 | struct ocfs2_xattr_bucket *bucket, |
5167 | const char *name) | |
01225596 | 5168 | { |
3e632946 | 5169 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5170 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5171 | ||
5172 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5173 | return 0; | |
01225596 TM |
5174 | |
5175 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5176 | xh->xh_entries[0].xe_name_hash) { | |
5177 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5178 | "hash = %u\n", | |
9c7759aa | 5179 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5180 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5181 | return -ENOSPC; | |
5182 | } | |
5183 | ||
5184 | return 0; | |
5185 | } | |
5186 | ||
5187 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5188 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5189 | struct ocfs2_xattr_search *xs, |
5190 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5191 | { |
5192 | struct ocfs2_xattr_header *xh; | |
5193 | struct ocfs2_xattr_entry *xe; | |
5194 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5195 | int free, max_free, need, old; |
01225596 TM |
5196 | size_t value_size = 0, name_len = strlen(xi->name); |
5197 | size_t blocksize = inode->i_sb->s_blocksize; | |
5198 | int ret, allocation = 0; | |
01225596 TM |
5199 | |
5200 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5201 | ||
5202 | try_again: | |
5203 | xh = xs->header; | |
5204 | count = le16_to_cpu(xh->xh_count); | |
5205 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5206 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5207 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5208 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5209 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5210 | |
5211 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5212 | "of %u which exceed block size\n", | |
ba937127 | 5213 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5214 | header_size); |
5215 | ||
5216 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5217 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5218 | else if (xi->value) | |
5219 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5220 | ||
5221 | if (xs->not_found) | |
5222 | need = sizeof(struct ocfs2_xattr_entry) + | |
5223 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5224 | else { | |
5225 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5226 | ||
5227 | /* | |
5228 | * We only replace the old value if the new length is smaller | |
5229 | * than the old one. Otherwise we will allocate new space in the | |
5230 | * bucket to store it. | |
5231 | */ | |
5232 | xe = xs->here; | |
5233 | if (ocfs2_xattr_is_local(xe)) | |
5234 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5235 | else | |
5236 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5237 | ||
5238 | if (old >= value_size) | |
5239 | need = 0; | |
5240 | } | |
5241 | ||
4442f518 | 5242 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5243 | /* |
5244 | * We need to make sure the new name/value pair | |
5245 | * can exist in the same block. | |
5246 | */ | |
5247 | if (xh_free_start % blocksize < need) | |
5248 | free -= xh_free_start % blocksize; | |
5249 | ||
5250 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5251 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5252 | " %u\n", xs->not_found, | |
ba937127 | 5253 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5254 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5255 | le16_to_cpu(xh->xh_name_value_len)); | |
5256 | ||
976331d8 TM |
5257 | if (free < need || |
5258 | (xs->not_found && | |
5259 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5260 | if (need <= max_free && |
5261 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5262 | /* | |
5263 | * We can create the space by defragment. Since only the | |
5264 | * name/value will be moved, the xe shouldn't be changed | |
5265 | * in xs. | |
5266 | */ | |
85db90e7 TM |
5267 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5268 | xs->bucket); | |
01225596 TM |
5269 | if (ret) { |
5270 | mlog_errno(ret); | |
5271 | goto out; | |
5272 | } | |
5273 | ||
5274 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5275 | free = xh_free_start - header_size |
5276 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5277 | if (xh_free_start % blocksize < need) |
5278 | free -= xh_free_start % blocksize; | |
5279 | ||
5280 | if (free >= need) | |
5281 | goto xattr_set; | |
5282 | ||
5283 | mlog(0, "Can't get enough space for xattr insert by " | |
5284 | "defragment. Need %u bytes, but we have %d, so " | |
5285 | "allocate new bucket for it.\n", need, free); | |
5286 | } | |
5287 | ||
5288 | /* | |
5289 | * We have to add new buckets or clusters and one | |
5290 | * allocation should leave us enough space for insert. | |
5291 | */ | |
5292 | BUG_ON(allocation); | |
5293 | ||
5294 | /* | |
5295 | * We do not allow for overlapping ranges between buckets. And | |
5296 | * the maximum number of collisions we will allow for then is | |
5297 | * one bucket's worth, so check it here whether we need to | |
5298 | * add a new bucket for the insert. | |
5299 | */ | |
80bcaf34 | 5300 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5301 | xs->bucket, |
80bcaf34 | 5302 | xi->name); |
01225596 TM |
5303 | if (ret) { |
5304 | mlog_errno(ret); | |
5305 | goto out; | |
5306 | } | |
5307 | ||
5308 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5309 | xs->xattr_bh, | |
91f2033f | 5310 | xs->bucket, |
78f30c31 | 5311 | ctxt); |
01225596 TM |
5312 | if (ret) { |
5313 | mlog_errno(ret); | |
5314 | goto out; | |
5315 | } | |
5316 | ||
91f2033f JB |
5317 | /* |
5318 | * ocfs2_add_new_xattr_bucket() will have updated | |
5319 | * xs->bucket if it moved, but it will not have updated | |
5320 | * any of the other search fields. Thus, we drop it and | |
5321 | * re-search. Everything should be cached, so it'll be | |
5322 | * quick. | |
5323 | */ | |
ba937127 | 5324 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5325 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5326 | xi->name_index, | |
5327 | xi->name, xs); | |
5328 | if (ret && ret != -ENODATA) | |
5329 | goto out; | |
5330 | xs->not_found = ret; | |
5331 | allocation = 1; | |
5332 | goto try_again; | |
5333 | } | |
5334 | ||
5335 | xattr_set: | |
78f30c31 | 5336 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5337 | out: |
5338 | mlog_exit(ret); | |
5339 | return ret; | |
5340 | } | |
a3944256 TM |
5341 | |
5342 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5343 | struct ocfs2_xattr_bucket *bucket, | |
5344 | void *para) | |
5345 | { | |
5346 | int ret = 0; | |
3e632946 | 5347 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5348 | u16 i; |
5349 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5350 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5351 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5352 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5353 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
5354 | ||
78f30c31 TM |
5355 | |
5356 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5357 | |
5358 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5359 | xe = &xh->xh_entries[i]; | |
5360 | if (ocfs2_xattr_is_local(xe)) | |
5361 | continue; | |
5362 | ||
88c3b062 TM |
5363 | ctxt.handle = ocfs2_start_trans(osb, credits); |
5364 | if (IS_ERR(ctxt.handle)) { | |
5365 | ret = PTR_ERR(ctxt.handle); | |
5366 | mlog_errno(ret); | |
5367 | break; | |
5368 | } | |
5369 | ||
548b0f22 | 5370 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5371 | i, 0, &ctxt); |
88c3b062 TM |
5372 | |
5373 | ocfs2_commit_trans(osb, ctxt.handle); | |
a3944256 TM |
5374 | if (ret) { |
5375 | mlog_errno(ret); | |
5376 | break; | |
5377 | } | |
5378 | } | |
5379 | ||
78f30c31 TM |
5380 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5381 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5382 | return ret; |
5383 | } | |
5384 | ||
492a8a33 TM |
5385 | /* |
5386 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5387 | * or change the extent record flag), we need to recalculate | |
5388 | * the metaecc for the whole bucket. So it is done here. | |
5389 | * | |
5390 | * Note: | |
5391 | * We have to give the extra credits for the caller. | |
5392 | */ | |
5393 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5394 | handle_t *handle, | |
5395 | void *para) | |
5396 | { | |
5397 | int ret; | |
5398 | struct ocfs2_xattr_bucket *bucket = | |
5399 | (struct ocfs2_xattr_bucket *)para; | |
5400 | ||
5401 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5402 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5403 | if (ret) { | |
5404 | mlog_errno(ret); | |
5405 | return ret; | |
5406 | } | |
5407 | ||
5408 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5409 | ||
5410 | return 0; | |
5411 | } | |
5412 | ||
5413 | /* | |
5414 | * Special action we need if the xattr value is refcounted. | |
5415 | * | |
5416 | * 1. If the xattr is refcounted, lock the tree. | |
5417 | * 2. CoW the xattr if we are setting the new value and the value | |
5418 | * will be stored outside. | |
5419 | * 3. In other case, decrease_refcount will work for us, so just | |
5420 | * lock the refcount tree, calculate the meta and credits is OK. | |
5421 | * | |
5422 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5423 | * currently CoW is a completed transaction, while this function | |
5424 | * will also lock the allocators and let us deadlock. So we will | |
5425 | * CoW the whole xattr value. | |
5426 | */ | |
5427 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5428 | struct ocfs2_dinode *di, | |
5429 | struct ocfs2_xattr_info *xi, | |
5430 | struct ocfs2_xattr_search *xis, | |
5431 | struct ocfs2_xattr_search *xbs, | |
5432 | struct ocfs2_refcount_tree **ref_tree, | |
5433 | int *meta_add, | |
5434 | int *credits) | |
5435 | { | |
5436 | int ret = 0; | |
5437 | struct ocfs2_xattr_block *xb; | |
5438 | struct ocfs2_xattr_entry *xe; | |
5439 | char *base; | |
5440 | u32 p_cluster, num_clusters; | |
5441 | unsigned int ext_flags; | |
5442 | int name_offset, name_len; | |
5443 | struct ocfs2_xattr_value_buf vb; | |
5444 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5445 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5446 | struct ocfs2_post_refcount refcount; | |
5447 | struct ocfs2_post_refcount *p = NULL; | |
5448 | struct buffer_head *ref_root_bh = NULL; | |
5449 | ||
5450 | if (!xis->not_found) { | |
5451 | xe = xis->here; | |
5452 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5453 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5454 | base = xis->base; | |
5455 | vb.vb_bh = xis->inode_bh; | |
5456 | vb.vb_access = ocfs2_journal_access_di; | |
5457 | } else { | |
5458 | int i, block_off = 0; | |
5459 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5460 | xe = xbs->here; | |
5461 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5462 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5463 | i = xbs->here - xbs->header->xh_entries; | |
5464 | ||
5465 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5466 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5467 | bucket_xh(xbs->bucket), |
5468 | i, &block_off, | |
5469 | &name_offset); | |
5470 | if (ret) { | |
5471 | mlog_errno(ret); | |
5472 | goto out; | |
5473 | } | |
5474 | base = bucket_block(xbs->bucket, block_off); | |
5475 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5476 | vb.vb_access = ocfs2_journal_access; | |
5477 | ||
5478 | if (ocfs2_meta_ecc(osb)) { | |
5479 | /*create parameters for ocfs2_post_refcount. */ | |
5480 | bucket = xbs->bucket; | |
5481 | refcount.credits = bucket->bu_blocks; | |
5482 | refcount.para = bucket; | |
5483 | refcount.func = | |
5484 | ocfs2_xattr_bucket_post_refcount; | |
5485 | p = &refcount; | |
5486 | } | |
5487 | } else { | |
5488 | base = xbs->base; | |
5489 | vb.vb_bh = xbs->xattr_bh; | |
5490 | vb.vb_access = ocfs2_journal_access_xb; | |
5491 | } | |
5492 | } | |
5493 | ||
5494 | if (ocfs2_xattr_is_local(xe)) | |
5495 | goto out; | |
5496 | ||
5497 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5498 | (base + name_offset + name_len); | |
5499 | ||
5500 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5501 | &num_clusters, &vb.vb_xv->xr_list, | |
5502 | &ext_flags); | |
5503 | if (ret) { | |
5504 | mlog_errno(ret); | |
5505 | goto out; | |
5506 | } | |
5507 | ||
5508 | /* | |
5509 | * We just need to check the 1st extent record, since we always | |
5510 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5511 | * some REFCOUNT extent recs after the 1st one. | |
5512 | */ | |
5513 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5514 | goto out; | |
5515 | ||
5516 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5517 | 1, ref_tree, &ref_root_bh); | |
5518 | if (ret) { | |
5519 | mlog_errno(ret); | |
5520 | goto out; | |
5521 | } | |
5522 | ||
5523 | /* | |
5524 | * If we are deleting the xattr or the new size will be stored inside, | |
5525 | * cool, leave it there, the xattr truncate process will remove them | |
5526 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5527 | * And the worse case is that every cluster truncate will split the | |
5528 | * refcount tree, and make the original extent become 3. So we will need | |
5529 | * 2 * cluster more extent recs at most. | |
5530 | */ | |
5531 | if (!xi->value || xi->value_len <= OCFS2_XATTR_INLINE_SIZE) { | |
5532 | ||
5533 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5534 | &(*ref_tree)->rf_ci, | |
5535 | ref_root_bh, vb.vb_xv, | |
5536 | meta_add, credits); | |
5537 | if (ret) | |
5538 | mlog_errno(ret); | |
5539 | goto out; | |
5540 | } | |
5541 | ||
5542 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5543 | *ref_tree, ref_root_bh, 0, | |
5544 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5545 | if (ret) | |
5546 | mlog_errno(ret); | |
5547 | ||
5548 | out: | |
5549 | brelse(ref_root_bh); | |
5550 | return ret; | |
5551 | } | |
5552 | ||
923f7f31 TY |
5553 | /* |
5554 | * 'security' attributes support | |
5555 | */ | |
5556 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5557 | size_t list_size, const char *name, | |
5558 | size_t name_len) | |
5559 | { | |
5560 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5561 | const size_t total_len = prefix_len + name_len + 1; | |
5562 | ||
5563 | if (list && total_len <= list_size) { | |
5564 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5565 | memcpy(list + prefix_len, name, name_len); | |
5566 | list[prefix_len + name_len] = '\0'; | |
5567 | } | |
5568 | return total_len; | |
5569 | } | |
5570 | ||
5571 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5572 | void *buffer, size_t size) | |
5573 | { | |
5574 | if (strcmp(name, "") == 0) | |
5575 | return -EINVAL; | |
5576 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5577 | buffer, size); | |
5578 | } | |
5579 | ||
5580 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5581 | const void *value, size_t size, int flags) | |
5582 | { | |
5583 | if (strcmp(name, "") == 0) | |
5584 | return -EINVAL; | |
5585 | ||
5586 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5587 | size, flags); | |
5588 | } | |
5589 | ||
534eaddd TY |
5590 | int ocfs2_init_security_get(struct inode *inode, |
5591 | struct inode *dir, | |
5592 | struct ocfs2_security_xattr_info *si) | |
5593 | { | |
38d59ef6 TY |
5594 | /* check whether ocfs2 support feature xattr */ |
5595 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
5596 | return -EOPNOTSUPP; | |
534eaddd TY |
5597 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
5598 | &si->value_len); | |
5599 | } | |
5600 | ||
5601 | int ocfs2_init_security_set(handle_t *handle, | |
5602 | struct inode *inode, | |
5603 | struct buffer_head *di_bh, | |
5604 | struct ocfs2_security_xattr_info *si, | |
5605 | struct ocfs2_alloc_context *xattr_ac, | |
5606 | struct ocfs2_alloc_context *data_ac) | |
5607 | { | |
5608 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5609 | OCFS2_XATTR_INDEX_SECURITY, | |
5610 | si->name, si->value, si->value_len, 0, | |
5611 | xattr_ac, data_ac); | |
5612 | } | |
5613 | ||
923f7f31 TY |
5614 | struct xattr_handler ocfs2_xattr_security_handler = { |
5615 | .prefix = XATTR_SECURITY_PREFIX, | |
5616 | .list = ocfs2_xattr_security_list, | |
5617 | .get = ocfs2_xattr_security_get, | |
5618 | .set = ocfs2_xattr_security_set, | |
5619 | }; | |
5620 | ||
99219aea MF |
5621 | /* |
5622 | * 'trusted' attributes support | |
5623 | */ | |
99219aea MF |
5624 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5625 | size_t list_size, const char *name, | |
5626 | size_t name_len) | |
5627 | { | |
ceb1eba3 | 5628 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5629 | const size_t total_len = prefix_len + name_len + 1; |
5630 | ||
5631 | if (list && total_len <= list_size) { | |
5632 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5633 | memcpy(list + prefix_len, name, name_len); | |
5634 | list[prefix_len + name_len] = '\0'; | |
5635 | } | |
5636 | return total_len; | |
5637 | } | |
5638 | ||
5639 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5640 | void *buffer, size_t size) | |
5641 | { | |
5642 | if (strcmp(name, "") == 0) | |
5643 | return -EINVAL; | |
5644 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5645 | buffer, size); | |
5646 | } | |
5647 | ||
5648 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5649 | const void *value, size_t size, int flags) | |
5650 | { | |
5651 | if (strcmp(name, "") == 0) | |
5652 | return -EINVAL; | |
5653 | ||
5654 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5655 | size, flags); | |
5656 | } | |
5657 | ||
5658 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5659 | .prefix = XATTR_TRUSTED_PREFIX, | |
5660 | .list = ocfs2_xattr_trusted_list, | |
5661 | .get = ocfs2_xattr_trusted_get, | |
5662 | .set = ocfs2_xattr_trusted_set, | |
5663 | }; | |
5664 | ||
99219aea MF |
5665 | /* |
5666 | * 'user' attributes support | |
5667 | */ | |
99219aea MF |
5668 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5669 | size_t list_size, const char *name, | |
5670 | size_t name_len) | |
5671 | { | |
ceb1eba3 | 5672 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5673 | const size_t total_len = prefix_len + name_len + 1; |
5674 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5675 | ||
5676 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5677 | return 0; | |
5678 | ||
5679 | if (list && total_len <= list_size) { | |
5680 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5681 | memcpy(list + prefix_len, name, name_len); | |
5682 | list[prefix_len + name_len] = '\0'; | |
5683 | } | |
5684 | return total_len; | |
5685 | } | |
5686 | ||
5687 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5688 | void *buffer, size_t size) | |
5689 | { | |
5690 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5691 | ||
5692 | if (strcmp(name, "") == 0) | |
5693 | return -EINVAL; | |
5694 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5695 | return -EOPNOTSUPP; | |
5696 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5697 | buffer, size); | |
5698 | } | |
5699 | ||
5700 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5701 | const void *value, size_t size, int flags) | |
5702 | { | |
5703 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5704 | ||
5705 | if (strcmp(name, "") == 0) | |
5706 | return -EINVAL; | |
5707 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5708 | return -EOPNOTSUPP; | |
5709 | ||
5710 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5711 | size, flags); | |
5712 | } | |
5713 | ||
5714 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5715 | .prefix = XATTR_USER_PREFIX, | |
5716 | .list = ocfs2_xattr_user_list, | |
5717 | .get = ocfs2_xattr_user_get, | |
5718 | .set = ocfs2_xattr_user_set, | |
5719 | }; |