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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 TY |
57 | #include "xattr.h" |
58 | ||
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 | ||
589dc260 TM |
143 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
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 TM |
159 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
160 | struct ocfs2_xattr_tree_root *xt, | |
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 | |
a3944256 TM |
173 | static int ocfs2_delete_xattr_index_block(struct inode *inode, |
174 | struct buffer_head *xb_bh); | |
c58b6032 JB |
175 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
176 | u64 src_blk, u64 last_blk, u64 to_blk, | |
177 | unsigned int start_bucket, | |
178 | u32 *first_hash); | |
a3944256 | 179 | |
0030e001 TY |
180 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
181 | { | |
182 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
183 | } | |
184 | ||
185 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
186 | { | |
187 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
188 | } | |
189 | ||
190 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
191 | { | |
192 | u16 len = sb->s_blocksize - | |
193 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
194 | ||
195 | return len / sizeof(struct ocfs2_xattr_entry); | |
196 | } | |
197 | ||
9c7759aa | 198 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 199 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 200 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 201 | |
ba937127 | 202 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 203 | { |
ba937127 JB |
204 | struct ocfs2_xattr_bucket *bucket; |
205 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 206 | |
ba937127 JB |
207 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
208 | ||
209 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
210 | if (bucket) { | |
211 | bucket->bu_inode = inode; | |
212 | bucket->bu_blocks = blks; | |
213 | } | |
214 | ||
215 | return bucket; | |
216 | } | |
217 | ||
218 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
219 | { | |
220 | int i; | |
221 | ||
222 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
223 | brelse(bucket->bu_bhs[i]); |
224 | bucket->bu_bhs[i] = NULL; | |
225 | } | |
226 | } | |
227 | ||
ba937127 JB |
228 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
229 | { | |
230 | if (bucket) { | |
231 | ocfs2_xattr_bucket_relse(bucket); | |
232 | bucket->bu_inode = NULL; | |
233 | kfree(bucket); | |
234 | } | |
235 | } | |
236 | ||
784b816a JB |
237 | /* |
238 | * A bucket that has never been written to disk doesn't need to be | |
239 | * read. We just need the buffer_heads. Don't call this for | |
240 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
241 | * them fully. | |
242 | */ | |
ba937127 | 243 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
244 | u64 xb_blkno) |
245 | { | |
246 | int i, rc = 0; | |
784b816a | 247 | |
ba937127 JB |
248 | for (i = 0; i < bucket->bu_blocks; i++) { |
249 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
250 | xb_blkno + i); | |
784b816a JB |
251 | if (!bucket->bu_bhs[i]) { |
252 | rc = -EIO; | |
253 | mlog_errno(rc); | |
254 | break; | |
255 | } | |
256 | ||
757055ad TM |
257 | if (!ocfs2_buffer_uptodate(bucket->bu_inode, |
258 | bucket->bu_bhs[i])) | |
259 | ocfs2_set_new_buffer_uptodate(bucket->bu_inode, | |
260 | bucket->bu_bhs[i]); | |
784b816a JB |
261 | } |
262 | ||
263 | if (rc) | |
ba937127 | 264 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
265 | return rc; |
266 | } | |
267 | ||
268 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 269 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
270 | u64 xb_blkno) |
271 | { | |
ba937127 | 272 | int rc; |
784b816a | 273 | |
ba937127 | 274 | rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno, |
970e4936 JB |
275 | bucket->bu_blocks, bucket->bu_bhs, 0, |
276 | NULL); | |
4d0e214e | 277 | if (!rc) { |
c8b9cf9a | 278 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
279 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
280 | bucket->bu_bhs, | |
281 | bucket->bu_blocks, | |
282 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 283 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
284 | if (rc) |
285 | mlog_errno(rc); | |
286 | } | |
287 | ||
784b816a | 288 | if (rc) |
ba937127 | 289 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
290 | return rc; |
291 | } | |
292 | ||
1224be02 | 293 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
294 | struct ocfs2_xattr_bucket *bucket, |
295 | int type) | |
296 | { | |
297 | int i, rc = 0; | |
1224be02 | 298 | |
ba937127 JB |
299 | for (i = 0; i < bucket->bu_blocks; i++) { |
300 | rc = ocfs2_journal_access(handle, bucket->bu_inode, | |
1224be02 JB |
301 | bucket->bu_bhs[i], type); |
302 | if (rc) { | |
303 | mlog_errno(rc); | |
304 | break; | |
305 | } | |
306 | } | |
307 | ||
308 | return rc; | |
309 | } | |
310 | ||
311 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
312 | struct ocfs2_xattr_bucket *bucket) |
313 | { | |
ba937127 | 314 | int i; |
1224be02 | 315 | |
c8b9cf9a | 316 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
317 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
318 | bucket->bu_bhs, bucket->bu_blocks, | |
319 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 320 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 321 | |
ba937127 | 322 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
323 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
324 | } | |
325 | ||
ba937127 | 326 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
327 | struct ocfs2_xattr_bucket *src) |
328 | { | |
329 | int i; | |
ba937127 JB |
330 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
331 | ||
332 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
333 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 334 | |
ba937127 | 335 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
336 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
337 | blocksize); | |
338 | } | |
339 | } | |
1224be02 | 340 | |
4ae1d69b JB |
341 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
342 | struct buffer_head *bh) | |
343 | { | |
d6b32bbb | 344 | int rc; |
4ae1d69b JB |
345 | struct ocfs2_xattr_block *xb = |
346 | (struct ocfs2_xattr_block *)bh->b_data; | |
347 | ||
348 | mlog(0, "Validating xattr block %llu\n", | |
349 | (unsigned long long)bh->b_blocknr); | |
350 | ||
d6b32bbb JB |
351 | BUG_ON(!buffer_uptodate(bh)); |
352 | ||
353 | /* | |
354 | * If the ecc fails, we return the error but otherwise | |
355 | * leave the filesystem running. We know any error is | |
356 | * local to this block. | |
357 | */ | |
358 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
359 | if (rc) | |
360 | return rc; | |
361 | ||
362 | /* | |
363 | * Errors after here are fatal | |
364 | */ | |
365 | ||
4ae1d69b JB |
366 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
367 | ocfs2_error(sb, | |
368 | "Extended attribute block #%llu has bad " | |
369 | "signature %.*s", | |
370 | (unsigned long long)bh->b_blocknr, 7, | |
371 | xb->xb_signature); | |
372 | return -EINVAL; | |
373 | } | |
374 | ||
375 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
376 | ocfs2_error(sb, | |
377 | "Extended attribute block #%llu has an " | |
378 | "invalid xb_blkno of %llu", | |
379 | (unsigned long long)bh->b_blocknr, | |
380 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
381 | return -EINVAL; | |
382 | } | |
383 | ||
384 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
385 | ocfs2_error(sb, | |
386 | "Extended attribute block #%llu has an invalid " | |
387 | "xb_fs_generation of #%u", | |
388 | (unsigned long long)bh->b_blocknr, | |
389 | le32_to_cpu(xb->xb_fs_generation)); | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
396 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
397 | struct buffer_head **bh) | |
398 | { | |
399 | int rc; | |
400 | struct buffer_head *tmp = *bh; | |
401 | ||
970e4936 JB |
402 | rc = ocfs2_read_block(inode, xb_blkno, &tmp, |
403 | ocfs2_validate_xattr_block); | |
4ae1d69b JB |
404 | |
405 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
406 | if (!rc && !*bh) | |
407 | *bh = tmp; | |
408 | ||
409 | return rc; | |
410 | } | |
411 | ||
936b8834 | 412 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
413 | { |
414 | struct xattr_handler *handler = NULL; | |
415 | ||
416 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
417 | handler = ocfs2_xattr_handler_map[name_index]; | |
418 | ||
936b8834 | 419 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
420 | } |
421 | ||
40daa16a | 422 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 423 | const char *name, |
40daa16a | 424 | int name_len) |
cf1d6c76 TY |
425 | { |
426 | /* Get hash value of uuid from super block */ | |
427 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
428 | int i; | |
429 | ||
cf1d6c76 TY |
430 | /* hash extended attribute name */ |
431 | for (i = 0; i < name_len; i++) { | |
432 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
433 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
434 | *name++; | |
435 | } | |
436 | ||
437 | return hash; | |
438 | } | |
439 | ||
440 | /* | |
441 | * ocfs2_xattr_hash_entry() | |
442 | * | |
443 | * Compute the hash of an extended attribute. | |
444 | */ | |
445 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
446 | struct ocfs2_xattr_header *header, | |
447 | struct ocfs2_xattr_entry *entry) | |
448 | { | |
449 | u32 hash = 0; | |
cf1d6c76 | 450 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 451 | |
2057e5c6 | 452 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
453 | entry->xe_name_hash = cpu_to_le32(hash); |
454 | ||
455 | return; | |
456 | } | |
f56654c4 | 457 | |
534eaddd TY |
458 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
459 | { | |
460 | int size = 0; | |
461 | ||
462 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
463 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
464 | else | |
465 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
466 | size += sizeof(struct ocfs2_xattr_entry); | |
467 | ||
468 | return size; | |
469 | } | |
470 | ||
471 | int ocfs2_calc_security_init(struct inode *dir, | |
472 | struct ocfs2_security_xattr_info *si, | |
473 | int *want_clusters, | |
474 | int *xattr_credits, | |
475 | struct ocfs2_alloc_context **xattr_ac) | |
476 | { | |
477 | int ret = 0; | |
478 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
479 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
480 | si->value_len); | |
481 | ||
482 | /* | |
483 | * The max space of security xattr taken inline is | |
484 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
485 | * So reserve one metadata block for it is ok. | |
486 | */ | |
487 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
488 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
489 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
490 | if (ret) { | |
491 | mlog_errno(ret); | |
492 | return ret; | |
493 | } | |
494 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
495 | } | |
496 | ||
497 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
498 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
499 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
500 | si->value_len); | |
501 | ||
502 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
503 | new_clusters); | |
504 | *want_clusters += new_clusters; | |
505 | } | |
534eaddd TY |
506 | return ret; |
507 | } | |
508 | ||
89c38bd0 TY |
509 | int ocfs2_calc_xattr_init(struct inode *dir, |
510 | struct buffer_head *dir_bh, | |
511 | int mode, | |
512 | struct ocfs2_security_xattr_info *si, | |
513 | int *want_clusters, | |
514 | int *xattr_credits, | |
9b7895ef | 515 | int *want_meta) |
89c38bd0 TY |
516 | { |
517 | int ret = 0; | |
518 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 519 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
520 | |
521 | if (si->enable) | |
522 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
523 | si->value_len); | |
524 | ||
525 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
526 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
527 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
528 | "", NULL, 0); | |
529 | if (acl_len > 0) { | |
530 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
531 | if (S_ISDIR(mode)) | |
532 | a_size <<= 1; | |
533 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
534 | mlog_errno(ret); | |
535 | return ret; | |
536 | } | |
537 | } | |
538 | ||
539 | if (!(s_size + a_size)) | |
540 | return ret; | |
541 | ||
542 | /* | |
543 | * The max space of security xattr taken inline is | |
544 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
545 | * The max space of acl xattr taken inline is | |
546 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
547 | * when blocksize = 512, may reserve one more cluser for | |
548 | * xattr bucket, otherwise reserve one metadata block | |
549 | * for them is ok. | |
6c9fd1dc TY |
550 | * If this is a new directory with inline data, |
551 | * we choose to reserve the entire inline area for | |
552 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
553 | */ |
554 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 555 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 556 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 557 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
558 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
559 | } | |
560 | ||
561 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
562 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
563 | *want_clusters += 1; | |
564 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
565 | } | |
566 | ||
0e445b6f TY |
567 | /* |
568 | * reserve credits and clusters for xattrs which has large value | |
569 | * and have to be set outside | |
570 | */ | |
571 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
572 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
573 | si->value_len); | |
574 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
575 | new_clusters); | |
576 | *want_clusters += new_clusters; | |
577 | } | |
89c38bd0 TY |
578 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
579 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
580 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
581 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
582 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
583 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
584 | new_clusters); | |
585 | *want_clusters += new_clusters; | |
89c38bd0 TY |
586 | } |
587 | ||
588 | return ret; | |
589 | } | |
590 | ||
f56654c4 TM |
591 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
592 | u32 clusters_to_add, | |
19b801f4 | 593 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 594 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
595 | { |
596 | int status = 0; | |
85db90e7 | 597 | handle_t *handle = ctxt->handle; |
f56654c4 TM |
598 | enum ocfs2_alloc_restarted why; |
599 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
19b801f4 | 600 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 601 | struct ocfs2_extent_tree et; |
f56654c4 TM |
602 | |
603 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
604 | ||
19b801f4 | 605 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f99b9b7c | 606 | |
19b801f4 | 607 | status = vb->vb_access(handle, inode, vb->vb_bh, |
2a50a743 | 608 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
609 | if (status < 0) { |
610 | mlog_errno(status); | |
611 | goto leave; | |
612 | } | |
613 | ||
19b801f4 | 614 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
615 | status = ocfs2_add_clusters_in_btree(osb, |
616 | inode, | |
617 | &logical_start, | |
618 | clusters_to_add, | |
619 | 0, | |
f99b9b7c | 620 | &et, |
f56654c4 | 621 | handle, |
78f30c31 TM |
622 | ctxt->data_ac, |
623 | ctxt->meta_ac, | |
f99b9b7c | 624 | &why); |
85db90e7 TM |
625 | if (status < 0) { |
626 | mlog_errno(status); | |
f56654c4 TM |
627 | goto leave; |
628 | } | |
629 | ||
19b801f4 | 630 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
631 | if (status < 0) { |
632 | mlog_errno(status); | |
633 | goto leave; | |
634 | } | |
635 | ||
19b801f4 | 636 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 637 | |
85db90e7 TM |
638 | /* |
639 | * We should have already allocated enough space before the transaction, | |
640 | * so no need to restart. | |
641 | */ | |
642 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
643 | |
644 | leave: | |
f56654c4 TM |
645 | |
646 | return status; | |
647 | } | |
648 | ||
649 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 650 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 651 | u32 cpos, u32 phys_cpos, u32 len, |
78f30c31 | 652 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
653 | { |
654 | int ret; | |
655 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 656 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
657 | struct ocfs2_extent_tree et; |
658 | ||
d72cc72d | 659 | ocfs2_init_xattr_value_extent_tree(&et, inode, vb); |
f56654c4 | 660 | |
d72cc72d JB |
661 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
662 | OCFS2_JOURNAL_ACCESS_WRITE); | |
f56654c4 TM |
663 | if (ret) { |
664 | mlog_errno(ret); | |
85db90e7 | 665 | goto out; |
f56654c4 TM |
666 | } |
667 | ||
78f30c31 TM |
668 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, |
669 | &ctxt->dealloc); | |
f56654c4 TM |
670 | if (ret) { |
671 | mlog_errno(ret); | |
85db90e7 | 672 | goto out; |
f56654c4 TM |
673 | } |
674 | ||
d72cc72d | 675 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 676 | |
d72cc72d | 677 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
678 | if (ret) { |
679 | mlog_errno(ret); | |
85db90e7 | 680 | goto out; |
f56654c4 TM |
681 | } |
682 | ||
78f30c31 | 683 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); |
f56654c4 TM |
684 | if (ret) |
685 | mlog_errno(ret); | |
686 | ||
f56654c4 | 687 | out: |
f56654c4 TM |
688 | return ret; |
689 | } | |
690 | ||
691 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
692 | u32 old_clusters, | |
693 | u32 new_clusters, | |
19b801f4 | 694 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 695 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
696 | { |
697 | int ret = 0; | |
698 | u32 trunc_len, cpos, phys_cpos, alloc_size; | |
699 | u64 block; | |
f56654c4 TM |
700 | |
701 | if (old_clusters <= new_clusters) | |
702 | return 0; | |
703 | ||
704 | cpos = new_clusters; | |
705 | trunc_len = old_clusters - new_clusters; | |
706 | while (trunc_len) { | |
707 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 708 | &alloc_size, |
19b801f4 | 709 | &vb->vb_xv->xr_list); |
f56654c4 TM |
710 | if (ret) { |
711 | mlog_errno(ret); | |
712 | goto out; | |
713 | } | |
714 | ||
715 | if (alloc_size > trunc_len) | |
716 | alloc_size = trunc_len; | |
717 | ||
19b801f4 | 718 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 719 | phys_cpos, alloc_size, |
78f30c31 | 720 | ctxt); |
f56654c4 TM |
721 | if (ret) { |
722 | mlog_errno(ret); | |
723 | goto out; | |
724 | } | |
725 | ||
726 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
727 | ocfs2_remove_xattr_clusters_from_cache(inode, block, | |
728 | alloc_size); | |
729 | cpos += alloc_size; | |
730 | trunc_len -= alloc_size; | |
731 | } | |
732 | ||
733 | out: | |
f56654c4 TM |
734 | return ret; |
735 | } | |
736 | ||
737 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 738 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
739 | int len, |
740 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
741 | { |
742 | int ret; | |
743 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 744 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
745 | |
746 | if (new_clusters == old_clusters) | |
747 | return 0; | |
748 | ||
749 | if (new_clusters > old_clusters) | |
750 | ret = ocfs2_xattr_extend_allocation(inode, | |
751 | new_clusters - old_clusters, | |
b3e5d379 | 752 | vb, ctxt); |
f56654c4 TM |
753 | else |
754 | ret = ocfs2_xattr_shrink_size(inode, | |
755 | old_clusters, new_clusters, | |
b3e5d379 | 756 | vb, ctxt); |
f56654c4 TM |
757 | |
758 | return ret; | |
759 | } | |
cf1d6c76 | 760 | |
936b8834 TM |
761 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
762 | size_t *result, const char *prefix, | |
763 | const char *name, int name_len) | |
764 | { | |
765 | char *p = buffer + *result; | |
766 | int prefix_len = strlen(prefix); | |
767 | int total_len = prefix_len + name_len + 1; | |
768 | ||
769 | *result += total_len; | |
770 | ||
771 | /* we are just looking for how big our buffer needs to be */ | |
772 | if (!size) | |
773 | return 0; | |
774 | ||
775 | if (*result > size) | |
776 | return -ERANGE; | |
777 | ||
778 | memcpy(p, prefix, prefix_len); | |
779 | memcpy(p + prefix_len, name, name_len); | |
780 | p[prefix_len + name_len] = '\0'; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
cf1d6c76 TY |
785 | static int ocfs2_xattr_list_entries(struct inode *inode, |
786 | struct ocfs2_xattr_header *header, | |
787 | char *buffer, size_t buffer_size) | |
788 | { | |
936b8834 TM |
789 | size_t result = 0; |
790 | int i, type, ret; | |
791 | const char *prefix, *name; | |
cf1d6c76 TY |
792 | |
793 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
794 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
795 | type = ocfs2_xattr_get_type(entry); |
796 | prefix = ocfs2_xattr_prefix(type); | |
797 | ||
798 | if (prefix) { | |
799 | name = (const char *)header + | |
800 | le16_to_cpu(entry->xe_name_offset); | |
801 | ||
802 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
803 | &result, prefix, name, | |
804 | entry->xe_name_len); | |
805 | if (ret) | |
806 | return ret; | |
cf1d6c76 TY |
807 | } |
808 | } | |
809 | ||
936b8834 | 810 | return result; |
cf1d6c76 TY |
811 | } |
812 | ||
813 | static int ocfs2_xattr_ibody_list(struct inode *inode, | |
814 | struct ocfs2_dinode *di, | |
815 | char *buffer, | |
816 | size_t buffer_size) | |
817 | { | |
818 | struct ocfs2_xattr_header *header = NULL; | |
819 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
820 | int ret = 0; | |
821 | ||
822 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
823 | return ret; | |
824 | ||
825 | header = (struct ocfs2_xattr_header *) | |
826 | ((void *)di + inode->i_sb->s_blocksize - | |
827 | le16_to_cpu(di->i_xattr_inline_size)); | |
828 | ||
829 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
830 | ||
831 | return ret; | |
832 | } | |
833 | ||
834 | static int ocfs2_xattr_block_list(struct inode *inode, | |
835 | struct ocfs2_dinode *di, | |
836 | char *buffer, | |
837 | size_t buffer_size) | |
838 | { | |
839 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 840 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
841 | int ret = 0; |
842 | ||
843 | if (!di->i_xattr_loc) | |
844 | return ret; | |
845 | ||
4ae1d69b JB |
846 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
847 | &blk_bh); | |
cf1d6c76 TY |
848 | if (ret < 0) { |
849 | mlog_errno(ret); | |
850 | return ret; | |
851 | } | |
cf1d6c76 | 852 | |
0c044f0b | 853 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
854 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
855 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
856 | ret = ocfs2_xattr_list_entries(inode, header, | |
857 | buffer, buffer_size); | |
858 | } else { | |
859 | struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; | |
860 | ret = ocfs2_xattr_tree_list_index_block(inode, xt, | |
861 | buffer, buffer_size); | |
862 | } | |
4ae1d69b | 863 | |
cf1d6c76 TY |
864 | brelse(blk_bh); |
865 | ||
866 | return ret; | |
867 | } | |
868 | ||
869 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
870 | char *buffer, | |
871 | size_t size) | |
872 | { | |
873 | int ret = 0, i_ret = 0, b_ret = 0; | |
874 | struct buffer_head *di_bh = NULL; | |
875 | struct ocfs2_dinode *di = NULL; | |
876 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
877 | ||
8154da3d TY |
878 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
879 | return -EOPNOTSUPP; | |
880 | ||
cf1d6c76 TY |
881 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
882 | return ret; | |
883 | ||
884 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
885 | if (ret < 0) { | |
886 | mlog_errno(ret); | |
887 | return ret; | |
888 | } | |
889 | ||
890 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
891 | ||
892 | down_read(&oi->ip_xattr_sem); | |
893 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
894 | if (i_ret < 0) | |
895 | b_ret = 0; | |
896 | else { | |
897 | if (buffer) { | |
898 | buffer += i_ret; | |
899 | size -= i_ret; | |
900 | } | |
901 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
902 | buffer, size); | |
903 | if (b_ret < 0) | |
904 | i_ret = 0; | |
905 | } | |
906 | up_read(&oi->ip_xattr_sem); | |
907 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
908 | ||
909 | brelse(di_bh); | |
910 | ||
911 | return i_ret + b_ret; | |
912 | } | |
913 | ||
914 | static int ocfs2_xattr_find_entry(int name_index, | |
915 | const char *name, | |
916 | struct ocfs2_xattr_search *xs) | |
917 | { | |
918 | struct ocfs2_xattr_entry *entry; | |
919 | size_t name_len; | |
920 | int i, cmp = 1; | |
921 | ||
922 | if (name == NULL) | |
923 | return -EINVAL; | |
924 | ||
925 | name_len = strlen(name); | |
926 | entry = xs->here; | |
927 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
928 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
929 | if (!cmp) | |
930 | cmp = name_len - entry->xe_name_len; | |
931 | if (!cmp) | |
932 | cmp = memcmp(name, (xs->base + | |
933 | le16_to_cpu(entry->xe_name_offset)), | |
934 | name_len); | |
935 | if (cmp == 0) | |
936 | break; | |
937 | entry += 1; | |
938 | } | |
939 | xs->here = entry; | |
940 | ||
941 | return cmp ? -ENODATA : 0; | |
942 | } | |
943 | ||
944 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 945 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
946 | void *buffer, |
947 | size_t len) | |
948 | { | |
949 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
950 | u64 blkno; | |
951 | int i, ret = 0; | |
952 | size_t cplen, blocksize; | |
953 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
954 | struct ocfs2_extent_list *el; |
955 | ||
cf1d6c76 TY |
956 | el = &xv->xr_list; |
957 | clusters = le32_to_cpu(xv->xr_clusters); | |
958 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
959 | blocksize = inode->i_sb->s_blocksize; | |
960 | ||
961 | cpos = 0; | |
962 | while (cpos < clusters) { | |
963 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
964 | &num_clusters, el); | |
965 | if (ret) { | |
966 | mlog_errno(ret); | |
967 | goto out; | |
968 | } | |
969 | ||
970 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
971 | /* Copy ocfs2_xattr_value */ | |
972 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 973 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
974 | if (ret) { |
975 | mlog_errno(ret); | |
976 | goto out; | |
977 | } | |
978 | ||
979 | cplen = len >= blocksize ? blocksize : len; | |
980 | memcpy(buffer, bh->b_data, cplen); | |
981 | len -= cplen; | |
982 | buffer += cplen; | |
983 | ||
984 | brelse(bh); | |
985 | bh = NULL; | |
986 | if (len == 0) | |
987 | break; | |
988 | } | |
989 | cpos += num_clusters; | |
990 | } | |
991 | out: | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
996 | int name_index, | |
997 | const char *name, | |
998 | void *buffer, | |
999 | size_t buffer_size, | |
1000 | struct ocfs2_xattr_search *xs) | |
1001 | { | |
1002 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1003 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1004 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1005 | size_t size; |
1006 | int ret = 0; | |
1007 | ||
1008 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1009 | return -ENODATA; | |
1010 | ||
1011 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1012 | xs->header = (struct ocfs2_xattr_header *) | |
1013 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1014 | xs->base = (void *)xs->header; | |
1015 | xs->here = xs->header->xh_entries; | |
1016 | ||
1017 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1018 | if (ret) | |
1019 | return ret; | |
1020 | size = le64_to_cpu(xs->here->xe_value_size); | |
1021 | if (buffer) { | |
1022 | if (size > buffer_size) | |
1023 | return -ERANGE; | |
1024 | if (ocfs2_xattr_is_local(xs->here)) { | |
1025 | memcpy(buffer, (void *)xs->base + | |
1026 | le16_to_cpu(xs->here->xe_name_offset) + | |
1027 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1028 | } else { | |
589dc260 TM |
1029 | xv = (struct ocfs2_xattr_value_root *) |
1030 | (xs->base + le16_to_cpu( | |
1031 | xs->here->xe_name_offset) + | |
1032 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1033 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1034 | buffer, size); |
1035 | if (ret < 0) { | |
1036 | mlog_errno(ret); | |
1037 | return ret; | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | return size; | |
1043 | } | |
1044 | ||
1045 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1046 | int name_index, | |
1047 | const char *name, | |
1048 | void *buffer, | |
1049 | size_t buffer_size, | |
1050 | struct ocfs2_xattr_search *xs) | |
1051 | { | |
cf1d6c76 | 1052 | struct ocfs2_xattr_block *xb; |
589dc260 | 1053 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1054 | size_t size; |
44d8e4e1 SM |
1055 | int ret = -ENODATA, name_offset, name_len, i; |
1056 | int uninitialized_var(block_off); | |
cf1d6c76 | 1057 | |
ba937127 JB |
1058 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1059 | if (!xs->bucket) { | |
1060 | ret = -ENOMEM; | |
1061 | mlog_errno(ret); | |
1062 | goto cleanup; | |
1063 | } | |
589dc260 | 1064 | |
54f443f4 JB |
1065 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1066 | if (ret) { | |
cf1d6c76 | 1067 | mlog_errno(ret); |
cf1d6c76 TY |
1068 | goto cleanup; |
1069 | } | |
1070 | ||
6c1e183e TY |
1071 | if (xs->not_found) { |
1072 | ret = -ENODATA; | |
1073 | goto cleanup; | |
1074 | } | |
1075 | ||
54f443f4 | 1076 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1077 | size = le64_to_cpu(xs->here->xe_value_size); |
1078 | if (buffer) { | |
1079 | ret = -ERANGE; | |
1080 | if (size > buffer_size) | |
1081 | goto cleanup; | |
589dc260 TM |
1082 | |
1083 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1084 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1085 | i = xs->here - xs->header->xh_entries; | |
1086 | ||
1087 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
1088 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
ba937127 | 1089 | bucket_xh(xs->bucket), |
589dc260 TM |
1090 | i, |
1091 | &block_off, | |
1092 | &name_offset); | |
ba937127 | 1093 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1094 | } |
cf1d6c76 TY |
1095 | if (ocfs2_xattr_is_local(xs->here)) { |
1096 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1097 | name_offset + name_len, size); |
cf1d6c76 | 1098 | } else { |
589dc260 TM |
1099 | xv = (struct ocfs2_xattr_value_root *) |
1100 | (xs->base + name_offset + name_len); | |
1101 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1102 | buffer, size); |
1103 | if (ret < 0) { | |
1104 | mlog_errno(ret); | |
1105 | goto cleanup; | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | ret = size; | |
1110 | cleanup: | |
ba937127 | 1111 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1112 | |
54f443f4 JB |
1113 | brelse(xs->xattr_bh); |
1114 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1115 | return ret; |
1116 | } | |
1117 | ||
4e3e9d02 TY |
1118 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1119 | struct buffer_head *di_bh, | |
0030e001 TY |
1120 | int name_index, |
1121 | const char *name, | |
1122 | void *buffer, | |
1123 | size_t buffer_size) | |
cf1d6c76 TY |
1124 | { |
1125 | int ret; | |
1126 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1127 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1128 | struct ocfs2_xattr_search xis = { | |
1129 | .not_found = -ENODATA, | |
1130 | }; | |
1131 | struct ocfs2_xattr_search xbs = { | |
1132 | .not_found = -ENODATA, | |
1133 | }; | |
1134 | ||
8154da3d TY |
1135 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1136 | return -EOPNOTSUPP; | |
1137 | ||
cf1d6c76 TY |
1138 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1139 | ret = -ENODATA; | |
1140 | ||
cf1d6c76 TY |
1141 | xis.inode_bh = xbs.inode_bh = di_bh; |
1142 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1143 | ||
1144 | down_read(&oi->ip_xattr_sem); | |
1145 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1146 | buffer_size, &xis); | |
6c1e183e | 1147 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1148 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1149 | buffer_size, &xbs); | |
1150 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1151 | |
1152 | return ret; | |
1153 | } | |
1154 | ||
1155 | /* ocfs2_xattr_get() | |
1156 | * | |
1157 | * Copy an extended attribute into the buffer provided. | |
1158 | * Buffer is NULL to compute the size of buffer required. | |
1159 | */ | |
1160 | static int ocfs2_xattr_get(struct inode *inode, | |
1161 | int name_index, | |
1162 | const char *name, | |
1163 | void *buffer, | |
1164 | size_t buffer_size) | |
1165 | { | |
1166 | int ret; | |
1167 | struct buffer_head *di_bh = NULL; | |
1168 | ||
1169 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1170 | if (ret < 0) { | |
1171 | mlog_errno(ret); | |
1172 | return ret; | |
1173 | } | |
1174 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1175 | name, buffer, buffer_size); | |
1176 | ||
cf1d6c76 TY |
1177 | ocfs2_inode_unlock(inode, 0); |
1178 | ||
1179 | brelse(di_bh); | |
1180 | ||
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1185 | handle_t *handle, |
cf1d6c76 TY |
1186 | struct ocfs2_xattr_value_root *xv, |
1187 | const void *value, | |
1188 | int value_len) | |
1189 | { | |
71d548a6 | 1190 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1191 | u16 blocksize = inode->i_sb->s_blocksize; |
1192 | u32 p_cluster, num_clusters; | |
1193 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1194 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1195 | u64 blkno; | |
1196 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1197 | |
1198 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1199 | ||
cf1d6c76 TY |
1200 | while (cpos < clusters) { |
1201 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1202 | &num_clusters, &xv->xr_list); | |
1203 | if (ret) { | |
1204 | mlog_errno(ret); | |
85db90e7 | 1205 | goto out; |
cf1d6c76 TY |
1206 | } |
1207 | ||
1208 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1209 | ||
1210 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
970e4936 | 1211 | ret = ocfs2_read_block(inode, blkno, &bh, NULL); |
cf1d6c76 TY |
1212 | if (ret) { |
1213 | mlog_errno(ret); | |
85db90e7 | 1214 | goto out; |
cf1d6c76 TY |
1215 | } |
1216 | ||
1217 | ret = ocfs2_journal_access(handle, | |
1218 | inode, | |
1219 | bh, | |
1220 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1221 | if (ret < 0) { | |
1222 | mlog_errno(ret); | |
85db90e7 | 1223 | goto out; |
cf1d6c76 TY |
1224 | } |
1225 | ||
1226 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1227 | memcpy(bh->b_data, value, cp_len); | |
1228 | value_len -= cp_len; | |
1229 | value += cp_len; | |
1230 | if (cp_len < blocksize) | |
1231 | memset(bh->b_data + cp_len, 0, | |
1232 | blocksize - cp_len); | |
1233 | ||
1234 | ret = ocfs2_journal_dirty(handle, bh); | |
1235 | if (ret < 0) { | |
1236 | mlog_errno(ret); | |
85db90e7 | 1237 | goto out; |
cf1d6c76 TY |
1238 | } |
1239 | brelse(bh); | |
1240 | bh = NULL; | |
1241 | ||
1242 | /* | |
1243 | * XXX: do we need to empty all the following | |
1244 | * blocks in this cluster? | |
1245 | */ | |
1246 | if (!value_len) | |
1247 | break; | |
1248 | } | |
1249 | cpos += num_clusters; | |
1250 | } | |
cf1d6c76 TY |
1251 | out: |
1252 | brelse(bh); | |
1253 | ||
1254 | return ret; | |
1255 | } | |
1256 | ||
1257 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1258 | handle_t *handle, |
cf1d6c76 TY |
1259 | struct ocfs2_xattr_info *xi, |
1260 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1261 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1262 | size_t offs) |
1263 | { | |
cf1d6c76 TY |
1264 | int ret = 0; |
1265 | size_t name_len = strlen(xi->name); | |
1266 | void *val = xs->base + offs; | |
1267 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1268 | ||
512620f4 JB |
1269 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
1270 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1271 | if (ret) { |
1272 | mlog_errno(ret); | |
85db90e7 | 1273 | goto out; |
cf1d6c76 TY |
1274 | } |
1275 | /* Decrease xattr count */ | |
1276 | le16_add_cpu(&xs->header->xh_count, -1); | |
1277 | /* Remove the xattr entry and tree root which has already be set*/ | |
1278 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1279 | memset(val, 0, size); | |
1280 | ||
512620f4 | 1281 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1282 | if (ret < 0) |
1283 | mlog_errno(ret); | |
cf1d6c76 TY |
1284 | out: |
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1289 | handle_t *handle, |
cf1d6c76 TY |
1290 | struct ocfs2_xattr_info *xi, |
1291 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1292 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1293 | size_t offs) |
1294 | { | |
85db90e7 | 1295 | int ret; |
cf1d6c76 | 1296 | |
0c748e95 JB |
1297 | ret = vb->vb_access(handle, inode, vb->vb_bh, |
1298 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1299 | if (ret) { |
1300 | mlog_errno(ret); | |
85db90e7 | 1301 | goto out; |
cf1d6c76 TY |
1302 | } |
1303 | ||
1304 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1305 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1306 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1307 | ocfs2_xattr_set_local(xs->here, 1); | |
1308 | else | |
1309 | ocfs2_xattr_set_local(xs->here, 0); | |
1310 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1311 | ||
0c748e95 | 1312 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1313 | if (ret < 0) |
1314 | mlog_errno(ret); | |
cf1d6c76 TY |
1315 | out: |
1316 | return ret; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * ocfs2_xattr_set_value_outside() | |
1321 | * | |
1322 | * Set large size value in B tree. | |
1323 | */ | |
1324 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1325 | struct ocfs2_xattr_info *xi, | |
1326 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1327 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1328 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1329 | size_t offs) |
1330 | { | |
1331 | size_t name_len = strlen(xi->name); | |
1332 | void *val = xs->base + offs; | |
1333 | struct ocfs2_xattr_value_root *xv = NULL; | |
1334 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1335 | int ret = 0; | |
1336 | ||
1337 | memset(val, 0, size); | |
1338 | memcpy(val, xi->name, name_len); | |
1339 | xv = (struct ocfs2_xattr_value_root *) | |
1340 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1341 | xv->xr_clusters = 0; | |
1342 | xv->xr_last_eb_blk = 0; | |
1343 | xv->xr_list.l_tree_depth = 0; | |
1344 | xv->xr_list.l_count = cpu_to_le16(1); | |
1345 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1346 | vb->vb_xv = xv; |
cf1d6c76 | 1347 | |
512620f4 | 1348 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt); |
cf1d6c76 TY |
1349 | if (ret < 0) { |
1350 | mlog_errno(ret); | |
1351 | return ret; | |
1352 | } | |
512620f4 | 1353 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1354 | if (ret < 0) { |
1355 | mlog_errno(ret); | |
1356 | return ret; | |
1357 | } | |
512620f4 | 1358 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb->vb_xv, |
85db90e7 | 1359 | xi->value, xi->value_len); |
cf1d6c76 TY |
1360 | if (ret < 0) |
1361 | mlog_errno(ret); | |
1362 | ||
1363 | return ret; | |
1364 | } | |
1365 | ||
1366 | /* | |
1367 | * ocfs2_xattr_set_entry_local() | |
1368 | * | |
1369 | * Set, replace or remove extended attribute in local. | |
1370 | */ | |
1371 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1372 | struct ocfs2_xattr_info *xi, | |
1373 | struct ocfs2_xattr_search *xs, | |
1374 | struct ocfs2_xattr_entry *last, | |
1375 | size_t min_offs) | |
1376 | { | |
1377 | size_t name_len = strlen(xi->name); | |
1378 | int i; | |
1379 | ||
1380 | if (xi->value && xs->not_found) { | |
1381 | /* Insert the new xattr entry. */ | |
1382 | le16_add_cpu(&xs->header->xh_count, 1); | |
1383 | ocfs2_xattr_set_type(last, xi->name_index); | |
1384 | ocfs2_xattr_set_local(last, 1); | |
1385 | last->xe_name_len = name_len; | |
1386 | } else { | |
1387 | void *first_val; | |
1388 | void *val; | |
1389 | size_t offs, size; | |
1390 | ||
1391 | first_val = xs->base + min_offs; | |
1392 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1393 | val = xs->base + offs; | |
1394 | ||
1395 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1396 | OCFS2_XATTR_INLINE_SIZE) | |
1397 | size = OCFS2_XATTR_SIZE(name_len) + | |
1398 | OCFS2_XATTR_ROOT_SIZE; | |
1399 | else | |
1400 | size = OCFS2_XATTR_SIZE(name_len) + | |
1401 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1402 | ||
1403 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1404 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1405 | /* The old and the new value have the | |
1406 | same size. Just replace the value. */ | |
1407 | ocfs2_xattr_set_local(xs->here, 1); | |
1408 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1409 | /* Clear value bytes. */ | |
1410 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1411 | 0, | |
1412 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1413 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1414 | xi->value, | |
1415 | xi->value_len); | |
1416 | return; | |
1417 | } | |
1418 | /* Remove the old name+value. */ | |
1419 | memmove(first_val + size, first_val, val - first_val); | |
1420 | memset(first_val, 0, size); | |
1421 | xs->here->xe_name_hash = 0; | |
1422 | xs->here->xe_name_offset = 0; | |
1423 | ocfs2_xattr_set_local(xs->here, 1); | |
1424 | xs->here->xe_value_size = 0; | |
1425 | ||
1426 | min_offs += size; | |
1427 | ||
1428 | /* Adjust all value offsets. */ | |
1429 | last = xs->header->xh_entries; | |
1430 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1431 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1432 | ||
1433 | if (o < offs) | |
1434 | last->xe_name_offset = cpu_to_le16(o + size); | |
1435 | last += 1; | |
1436 | } | |
1437 | ||
1438 | if (!xi->value) { | |
1439 | /* Remove the old entry. */ | |
1440 | last -= 1; | |
1441 | memmove(xs->here, xs->here + 1, | |
1442 | (void *)last - (void *)xs->here); | |
1443 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1444 | le16_add_cpu(&xs->header->xh_count, -1); | |
1445 | } | |
1446 | } | |
1447 | if (xi->value) { | |
1448 | /* Insert the new name+value. */ | |
1449 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1450 | OCFS2_XATTR_SIZE(xi->value_len); | |
1451 | void *val = xs->base + min_offs - size; | |
1452 | ||
1453 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1454 | memset(val, 0, size); | |
1455 | memcpy(val, xi->name, name_len); | |
1456 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1457 | xi->value, | |
1458 | xi->value_len); | |
1459 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1460 | ocfs2_xattr_set_local(xs->here, 1); | |
1461 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1462 | } | |
1463 | ||
1464 | return; | |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * ocfs2_xattr_set_entry() | |
1469 | * | |
1470 | * Set extended attribute entry into inode or block. | |
1471 | * | |
1472 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1473 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1474 | * then set value in B tree with set_value_outside(). | |
1475 | */ | |
1476 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1477 | struct ocfs2_xattr_info *xi, | |
1478 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1479 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1480 | int flag) |
1481 | { | |
1482 | struct ocfs2_xattr_entry *last; | |
1483 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1484 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1485 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1486 | size_t size_l = 0; | |
85db90e7 | 1487 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1488 | int free, i, ret; |
1489 | struct ocfs2_xattr_info xi_l = { | |
1490 | .name_index = xi->name_index, | |
1491 | .name = xi->name, | |
1492 | .value = xi->value, | |
1493 | .value_len = xi->value_len, | |
1494 | }; | |
512620f4 JB |
1495 | struct ocfs2_xattr_value_buf vb = { |
1496 | .vb_bh = xs->xattr_bh, | |
1497 | .vb_access = ocfs2_journal_access_di, | |
1498 | }; | |
1499 | ||
1500 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1501 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1502 | vb.vb_access = ocfs2_journal_access_xb; | |
1503 | } else | |
1504 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1505 | |
1506 | /* Compute min_offs, last and free space. */ | |
1507 | last = xs->header->xh_entries; | |
1508 | ||
1509 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1510 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1511 | if (offs < min_offs) | |
1512 | min_offs = offs; | |
1513 | last += 1; | |
1514 | } | |
1515 | ||
4442f518 | 1516 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1517 | if (free < 0) |
b37c4d84 | 1518 | return -EIO; |
cf1d6c76 TY |
1519 | |
1520 | if (!xs->not_found) { | |
1521 | size_t size = 0; | |
1522 | if (ocfs2_xattr_is_local(xs->here)) | |
1523 | size = OCFS2_XATTR_SIZE(name_len) + | |
1524 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1525 | else | |
1526 | size = OCFS2_XATTR_SIZE(name_len) + | |
1527 | OCFS2_XATTR_ROOT_SIZE; | |
1528 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1529 | } | |
1530 | /* Check free space in inode or block */ | |
1531 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1532 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1533 | OCFS2_XATTR_SIZE(name_len) + | |
1534 | OCFS2_XATTR_ROOT_SIZE) { | |
1535 | ret = -ENOSPC; | |
1536 | goto out; | |
1537 | } | |
1538 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1539 | xi_l.value = (void *)&def_xv; | |
1540 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1541 | } else if (xi->value) { | |
1542 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1543 | OCFS2_XATTR_SIZE(name_len) + | |
1544 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1545 | ret = -ENOSPC; | |
1546 | goto out; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | if (!xs->not_found) { | |
1551 | /* For existing extended attribute */ | |
1552 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1553 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1554 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1555 | void *val = xs->base + offs; | |
1556 | ||
1557 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1558 | /* Replace existing local xattr with tree root */ | |
1559 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1560 | ctxt, &vb, offs); |
cf1d6c76 TY |
1561 | if (ret < 0) |
1562 | mlog_errno(ret); | |
1563 | goto out; | |
1564 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1565 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1566 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1567 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 TY |
1568 | |
1569 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1570 | /* | |
1571 | * If new value need set outside also, | |
1572 | * first truncate old value to new value, | |
1573 | * then set new value with set_value_outside(). | |
1574 | */ | |
1575 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1576 | &vb, |
78f30c31 TM |
1577 | xi->value_len, |
1578 | ctxt); | |
cf1d6c76 TY |
1579 | if (ret < 0) { |
1580 | mlog_errno(ret); | |
1581 | goto out; | |
1582 | } | |
1583 | ||
85db90e7 TM |
1584 | ret = ocfs2_xattr_update_entry(inode, |
1585 | handle, | |
1586 | xi, | |
1587 | xs, | |
0c748e95 | 1588 | &vb, |
85db90e7 | 1589 | offs); |
cf1d6c76 TY |
1590 | if (ret < 0) { |
1591 | mlog_errno(ret); | |
1592 | goto out; | |
1593 | } | |
1594 | ||
85db90e7 TM |
1595 | ret = __ocfs2_xattr_set_value_outside(inode, |
1596 | handle, | |
b3e5d379 | 1597 | vb.vb_xv, |
85db90e7 TM |
1598 | xi->value, |
1599 | xi->value_len); | |
cf1d6c76 TY |
1600 | if (ret < 0) |
1601 | mlog_errno(ret); | |
1602 | goto out; | |
1603 | } else { | |
1604 | /* | |
1605 | * If new value need set in local, | |
1606 | * just trucate old value to zero. | |
1607 | */ | |
1608 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1609 | &vb, |
85db90e7 TM |
1610 | 0, |
1611 | ctxt); | |
cf1d6c76 TY |
1612 | if (ret < 0) |
1613 | mlog_errno(ret); | |
1614 | } | |
1615 | } | |
1616 | } | |
1617 | ||
512620f4 JB |
1618 | ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh, |
1619 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1620 | if (ret) { |
1621 | mlog_errno(ret); | |
85db90e7 | 1622 | goto out; |
cf1d6c76 TY |
1623 | } |
1624 | ||
1625 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
512620f4 JB |
1626 | ret = vb.vb_access(handle, inode, vb.vb_bh, |
1627 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1628 | if (ret) { |
1629 | mlog_errno(ret); | |
85db90e7 | 1630 | goto out; |
cf1d6c76 TY |
1631 | } |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Set value in local, include set tree root in local. | |
1636 | * This is the first step for value size >INLINE_SIZE. | |
1637 | */ | |
1638 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1639 | ||
1640 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1641 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1642 | if (ret < 0) { | |
1643 | mlog_errno(ret); | |
85db90e7 | 1644 | goto out; |
cf1d6c76 TY |
1645 | } |
1646 | } | |
1647 | ||
1648 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1649 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1650 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1651 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1652 | ||
1653 | /* | |
1654 | * Adjust extent record count or inline data size | |
1655 | * to reserve space for extended attribute. | |
1656 | */ | |
1657 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1658 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1659 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1660 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1661 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1662 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1663 | sizeof(struct ocfs2_extent_rec))); | |
1664 | } | |
1665 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1666 | } | |
1667 | /* Update xattr flag */ | |
1668 | spin_lock(&oi->ip_lock); | |
1669 | oi->ip_dyn_features |= flag; | |
1670 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1671 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1672 | |
1673 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1674 | if (ret < 0) | |
1675 | mlog_errno(ret); | |
1676 | ||
cf1d6c76 TY |
1677 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1678 | /* | |
1679 | * Set value outside in B tree. | |
1680 | * This is the second step for value size > INLINE_SIZE. | |
1681 | */ | |
1682 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1683 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1684 | &vb, offs); | |
cf1d6c76 TY |
1685 | if (ret < 0) { |
1686 | int ret2; | |
1687 | ||
1688 | mlog_errno(ret); | |
1689 | /* | |
1690 | * If set value outside failed, we have to clean | |
1691 | * the junk tree root we have already set in local. | |
1692 | */ | |
85db90e7 | 1693 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1694 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1695 | if (ret2 < 0) |
1696 | mlog_errno(ret2); | |
1697 | } | |
1698 | } | |
1699 | out: | |
1700 | return ret; | |
cf1d6c76 TY |
1701 | } |
1702 | ||
cf1d6c76 | 1703 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 1704 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1705 | struct ocfs2_xattr_header *header) |
1706 | { | |
1707 | int ret = 0, i; | |
78f30c31 TM |
1708 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1709 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
1710 | ||
1711 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 | 1712 | |
a90714c1 JK |
1713 | ctxt.handle = ocfs2_start_trans(osb, |
1714 | ocfs2_remove_extent_credits(osb->sb)); | |
85db90e7 TM |
1715 | if (IS_ERR(ctxt.handle)) { |
1716 | ret = PTR_ERR(ctxt.handle); | |
1717 | mlog_errno(ret); | |
1718 | goto out; | |
1719 | } | |
1720 | ||
cf1d6c76 TY |
1721 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
1722 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1723 | ||
1724 | if (!ocfs2_xattr_is_local(entry)) { | |
cf1d6c76 TY |
1725 | void *val; |
1726 | ||
1727 | val = (void *)header + | |
1728 | le16_to_cpu(entry->xe_name_offset); | |
4311901d | 1729 | vb->vb_xv = (struct ocfs2_xattr_value_root *) |
cf1d6c76 | 1730 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); |
4311901d | 1731 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); |
cf1d6c76 TY |
1732 | if (ret < 0) { |
1733 | mlog_errno(ret); | |
78f30c31 | 1734 | break; |
cf1d6c76 TY |
1735 | } |
1736 | } | |
1737 | } | |
1738 | ||
85db90e7 | 1739 | ocfs2_commit_trans(osb, ctxt.handle); |
78f30c31 TM |
1740 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1741 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
85db90e7 | 1742 | out: |
cf1d6c76 TY |
1743 | return ret; |
1744 | } | |
1745 | ||
1746 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1747 | struct buffer_head *di_bh) | |
1748 | { | |
1749 | ||
1750 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1751 | struct ocfs2_xattr_header *header; | |
1752 | int ret; | |
4311901d JB |
1753 | struct ocfs2_xattr_value_buf vb = { |
1754 | .vb_bh = di_bh, | |
1755 | .vb_access = ocfs2_journal_access_di, | |
1756 | }; | |
cf1d6c76 TY |
1757 | |
1758 | header = (struct ocfs2_xattr_header *) | |
1759 | ((void *)di + inode->i_sb->s_blocksize - | |
1760 | le16_to_cpu(di->i_xattr_inline_size)); | |
1761 | ||
4311901d | 1762 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
cf1d6c76 TY |
1763 | |
1764 | return ret; | |
1765 | } | |
1766 | ||
1767 | static int ocfs2_xattr_block_remove(struct inode *inode, | |
1768 | struct buffer_head *blk_bh) | |
1769 | { | |
1770 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 1771 | int ret = 0; |
4311901d JB |
1772 | struct ocfs2_xattr_value_buf vb = { |
1773 | .vb_bh = blk_bh, | |
1774 | .vb_access = ocfs2_journal_access_xb, | |
1775 | }; | |
cf1d6c76 TY |
1776 | |
1777 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1778 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1779 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
4311901d | 1780 | ret = ocfs2_remove_value_outside(inode, &vb, header); |
a3944256 TM |
1781 | } else |
1782 | ret = ocfs2_delete_xattr_index_block(inode, blk_bh); | |
cf1d6c76 TY |
1783 | |
1784 | return ret; | |
1785 | } | |
1786 | ||
08413899 TM |
1787 | static int ocfs2_xattr_free_block(struct inode *inode, |
1788 | u64 block) | |
1789 | { | |
1790 | struct inode *xb_alloc_inode; | |
1791 | struct buffer_head *xb_alloc_bh = NULL; | |
1792 | struct buffer_head *blk_bh = NULL; | |
1793 | struct ocfs2_xattr_block *xb; | |
1794 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1795 | handle_t *handle; | |
1796 | int ret = 0; | |
1797 | u64 blk, bg_blkno; | |
1798 | u16 bit; | |
1799 | ||
4ae1d69b | 1800 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1801 | if (ret < 0) { |
1802 | mlog_errno(ret); | |
1803 | goto out; | |
1804 | } | |
1805 | ||
08413899 TM |
1806 | ret = ocfs2_xattr_block_remove(inode, blk_bh); |
1807 | if (ret < 0) { | |
1808 | mlog_errno(ret); | |
1809 | goto out; | |
1810 | } | |
1811 | ||
4ae1d69b | 1812 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1813 | blk = le64_to_cpu(xb->xb_blkno); |
1814 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1815 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1816 | ||
1817 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1818 | EXTENT_ALLOC_SYSTEM_INODE, | |
1819 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1820 | if (!xb_alloc_inode) { | |
1821 | ret = -ENOMEM; | |
1822 | mlog_errno(ret); | |
1823 | goto out; | |
1824 | } | |
1825 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1826 | ||
1827 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1828 | if (ret < 0) { | |
1829 | mlog_errno(ret); | |
1830 | goto out_mutex; | |
1831 | } | |
1832 | ||
1833 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1834 | if (IS_ERR(handle)) { | |
1835 | ret = PTR_ERR(handle); | |
1836 | mlog_errno(ret); | |
1837 | goto out_unlock; | |
1838 | } | |
1839 | ||
1840 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1841 | bit, bg_blkno, 1); | |
1842 | if (ret < 0) | |
1843 | mlog_errno(ret); | |
1844 | ||
1845 | ocfs2_commit_trans(osb, handle); | |
1846 | out_unlock: | |
1847 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1848 | brelse(xb_alloc_bh); | |
1849 | out_mutex: | |
1850 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1851 | iput(xb_alloc_inode); | |
1852 | out: | |
1853 | brelse(blk_bh); | |
1854 | return ret; | |
1855 | } | |
1856 | ||
cf1d6c76 TY |
1857 | /* |
1858 | * ocfs2_xattr_remove() | |
1859 | * | |
1860 | * Free extended attribute resources associated with this inode. | |
1861 | */ | |
1862 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1863 | { | |
cf1d6c76 TY |
1864 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1865 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1866 | handle_t *handle; | |
1867 | int ret; | |
1868 | ||
8154da3d TY |
1869 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1870 | return 0; | |
1871 | ||
cf1d6c76 TY |
1872 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1873 | return 0; | |
1874 | ||
1875 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1876 | ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1877 | if (ret < 0) { | |
1878 | mlog_errno(ret); | |
1879 | goto out; | |
1880 | } | |
1881 | } | |
cf1d6c76 | 1882 | |
08413899 TM |
1883 | if (di->i_xattr_loc) { |
1884 | ret = ocfs2_xattr_free_block(inode, | |
1885 | le64_to_cpu(di->i_xattr_loc)); | |
cf1d6c76 TY |
1886 | if (ret < 0) { |
1887 | mlog_errno(ret); | |
1888 | goto out; | |
1889 | } | |
1890 | } | |
1891 | ||
1892 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1893 | OCFS2_INODE_UPDATE_CREDITS); | |
1894 | if (IS_ERR(handle)) { | |
1895 | ret = PTR_ERR(handle); | |
1896 | mlog_errno(ret); | |
1897 | goto out; | |
1898 | } | |
84008972 JB |
1899 | ret = ocfs2_journal_access_di(handle, inode, di_bh, |
1900 | OCFS2_JOURNAL_ACCESS_WRITE); | |
cf1d6c76 TY |
1901 | if (ret) { |
1902 | mlog_errno(ret); | |
1903 | goto out_commit; | |
1904 | } | |
1905 | ||
08413899 | 1906 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
1907 | |
1908 | spin_lock(&oi->ip_lock); | |
1909 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1910 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1911 | spin_unlock(&oi->ip_lock); | |
1912 | ||
1913 | ret = ocfs2_journal_dirty(handle, di_bh); | |
1914 | if (ret < 0) | |
1915 | mlog_errno(ret); | |
1916 | out_commit: | |
1917 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1918 | out: | |
cf1d6c76 TY |
1919 | return ret; |
1920 | } | |
1921 | ||
1922 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1923 | struct ocfs2_dinode *di) | |
1924 | { | |
1925 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1926 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1927 | int free; | |
1928 | ||
1929 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1930 | return 0; | |
1931 | ||
1932 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1933 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1934 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1935 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1936 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1937 | le64_to_cpu(di->i_size); | |
1938 | } else { | |
1939 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1940 | free = (le16_to_cpu(el->l_count) - | |
1941 | le16_to_cpu(el->l_next_free_rec)) * | |
1942 | sizeof(struct ocfs2_extent_rec); | |
1943 | } | |
1944 | if (free >= xattrsize) | |
1945 | return 1; | |
1946 | ||
1947 | return 0; | |
1948 | } | |
1949 | ||
1950 | /* | |
1951 | * ocfs2_xattr_ibody_find() | |
1952 | * | |
1953 | * Find extended attribute in inode block and | |
1954 | * fill search info into struct ocfs2_xattr_search. | |
1955 | */ | |
1956 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1957 | int name_index, | |
1958 | const char *name, | |
1959 | struct ocfs2_xattr_search *xs) | |
1960 | { | |
1961 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1962 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1963 | int ret; | |
1964 | int has_space = 0; | |
1965 | ||
1966 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1967 | return 0; | |
1968 | ||
1969 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1970 | down_read(&oi->ip_alloc_sem); | |
1971 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1972 | up_read(&oi->ip_alloc_sem); | |
1973 | if (!has_space) | |
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | xs->xattr_bh = xs->inode_bh; | |
1978 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1979 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1980 | xs->header = (struct ocfs2_xattr_header *) | |
1981 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1982 | else | |
1983 | xs->header = (struct ocfs2_xattr_header *) | |
1984 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1985 | xs->base = (void *)xs->header; | |
1986 | xs->here = xs->header->xh_entries; | |
1987 | ||
1988 | /* Find the named attribute. */ | |
1989 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1990 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1991 | if (ret && ret != -ENODATA) | |
1992 | return ret; | |
1993 | xs->not_found = ret; | |
1994 | } | |
1995 | ||
1996 | return 0; | |
1997 | } | |
1998 | ||
1999 | /* | |
2000 | * ocfs2_xattr_ibody_set() | |
2001 | * | |
2002 | * Set, replace or remove an extended attribute into inode block. | |
2003 | * | |
2004 | */ | |
2005 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2006 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2007 | struct ocfs2_xattr_search *xs, |
2008 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2009 | { |
2010 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2011 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2012 | int ret; | |
2013 | ||
2014 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2015 | return -ENOSPC; | |
2016 | ||
2017 | down_write(&oi->ip_alloc_sem); | |
2018 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2019 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2020 | ret = -ENOSPC; | |
2021 | goto out; | |
2022 | } | |
2023 | } | |
2024 | ||
78f30c31 | 2025 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2026 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2027 | out: | |
2028 | up_write(&oi->ip_alloc_sem); | |
2029 | ||
2030 | return ret; | |
2031 | } | |
2032 | ||
2033 | /* | |
2034 | * ocfs2_xattr_block_find() | |
2035 | * | |
2036 | * Find extended attribute in external block and | |
2037 | * fill search info into struct ocfs2_xattr_search. | |
2038 | */ | |
2039 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2040 | int name_index, | |
2041 | const char *name, | |
2042 | struct ocfs2_xattr_search *xs) | |
2043 | { | |
2044 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2045 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2046 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2047 | int ret = 0; |
2048 | ||
2049 | if (!di->i_xattr_loc) | |
2050 | return ret; | |
2051 | ||
4ae1d69b JB |
2052 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2053 | &blk_bh); | |
cf1d6c76 TY |
2054 | if (ret < 0) { |
2055 | mlog_errno(ret); | |
2056 | return ret; | |
2057 | } | |
f6087fb7 | 2058 | |
cf1d6c76 | 2059 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2060 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2061 | |
2062 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2063 | xs->header = &xb->xb_attrs.xb_header; | |
2064 | xs->base = (void *)xs->header; | |
2065 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2066 | xs->here = xs->header->xh_entries; | |
2067 | ||
2068 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2069 | } else | |
2070 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2071 | name_index, | |
2072 | name, xs); | |
cf1d6c76 | 2073 | |
cf1d6c76 TY |
2074 | if (ret && ret != -ENODATA) { |
2075 | xs->xattr_bh = NULL; | |
2076 | goto cleanup; | |
2077 | } | |
2078 | xs->not_found = ret; | |
2079 | return 0; | |
cf1d6c76 TY |
2080 | cleanup: |
2081 | brelse(blk_bh); | |
2082 | ||
2083 | return ret; | |
2084 | } | |
2085 | ||
2086 | /* | |
2087 | * ocfs2_xattr_block_set() | |
2088 | * | |
2089 | * Set, replace or remove an extended attribute into external block. | |
2090 | * | |
2091 | */ | |
2092 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2093 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2094 | struct ocfs2_xattr_search *xs, |
2095 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2096 | { |
2097 | struct buffer_head *new_bh = NULL; | |
2098 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2099 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
85db90e7 | 2100 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
2101 | struct ocfs2_xattr_block *xblk = NULL; |
2102 | u16 suballoc_bit_start; | |
2103 | u32 num_got; | |
2104 | u64 first_blkno; | |
2105 | int ret; | |
2106 | ||
2107 | if (!xs->xattr_bh) { | |
84008972 JB |
2108 | ret = ocfs2_journal_access_di(handle, inode, xs->inode_bh, |
2109 | OCFS2_JOURNAL_ACCESS_CREATE); | |
cf1d6c76 TY |
2110 | if (ret < 0) { |
2111 | mlog_errno(ret); | |
85db90e7 | 2112 | goto end; |
cf1d6c76 TY |
2113 | } |
2114 | ||
78f30c31 | 2115 | ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, |
cf1d6c76 TY |
2116 | &suballoc_bit_start, &num_got, |
2117 | &first_blkno); | |
2118 | if (ret < 0) { | |
2119 | mlog_errno(ret); | |
85db90e7 | 2120 | goto end; |
cf1d6c76 TY |
2121 | } |
2122 | ||
2123 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2124 | ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
2125 | ||
84008972 JB |
2126 | ret = ocfs2_journal_access_xb(handle, inode, new_bh, |
2127 | OCFS2_JOURNAL_ACCESS_CREATE); | |
cf1d6c76 TY |
2128 | if (ret < 0) { |
2129 | mlog_errno(ret); | |
85db90e7 | 2130 | goto end; |
cf1d6c76 TY |
2131 | } |
2132 | ||
2133 | /* Initialize ocfs2_xattr_block */ | |
2134 | xs->xattr_bh = new_bh; | |
2135 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2136 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2137 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2138 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2139 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2140 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2141 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2142 | ||
2143 | xs->header = &xblk->xb_attrs.xb_header; | |
2144 | xs->base = (void *)xs->header; | |
2145 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2146 | xs->here = xs->header->xh_entries; | |
2147 | ||
cf1d6c76 TY |
2148 | ret = ocfs2_journal_dirty(handle, new_bh); |
2149 | if (ret < 0) { | |
2150 | mlog_errno(ret); | |
85db90e7 | 2151 | goto end; |
cf1d6c76 TY |
2152 | } |
2153 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
85db90e7 | 2154 | ocfs2_journal_dirty(handle, xs->inode_bh); |
01225596 TM |
2155 | } else |
2156 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2157 | ||
2158 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2159 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2160 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2161 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2162 | if (!ret || ret != -ENOSPC) |
2163 | goto end; | |
2164 | ||
78f30c31 | 2165 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2166 | if (ret) |
2167 | goto end; | |
cf1d6c76 TY |
2168 | } |
2169 | ||
78f30c31 | 2170 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2171 | |
2172 | end: | |
cf1d6c76 TY |
2173 | |
2174 | return ret; | |
2175 | } | |
2176 | ||
78f30c31 TM |
2177 | /* Check whether the new xattr can be inserted into the inode. */ |
2178 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2179 | struct ocfs2_xattr_info *xi, | |
2180 | struct ocfs2_xattr_search *xs) | |
2181 | { | |
2182 | u64 value_size; | |
2183 | struct ocfs2_xattr_entry *last; | |
2184 | int free, i; | |
2185 | size_t min_offs = xs->end - xs->base; | |
2186 | ||
2187 | if (!xs->header) | |
2188 | return 0; | |
2189 | ||
2190 | last = xs->header->xh_entries; | |
2191 | ||
2192 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2193 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2194 | if (offs < min_offs) | |
2195 | min_offs = offs; | |
2196 | last += 1; | |
2197 | } | |
2198 | ||
4442f518 | 2199 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2200 | if (free < 0) |
2201 | return 0; | |
2202 | ||
2203 | BUG_ON(!xs->not_found); | |
2204 | ||
2205 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2206 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2207 | else | |
2208 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2209 | ||
2210 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2211 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2212 | return 1; | |
2213 | ||
2214 | return 0; | |
2215 | } | |
2216 | ||
2217 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2218 | struct ocfs2_dinode *di, | |
2219 | struct ocfs2_xattr_info *xi, | |
2220 | struct ocfs2_xattr_search *xis, | |
2221 | struct ocfs2_xattr_search *xbs, | |
2222 | int *clusters_need, | |
85db90e7 TM |
2223 | int *meta_need, |
2224 | int *credits_need) | |
78f30c31 TM |
2225 | { |
2226 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2227 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2228 | struct buffer_head *bh = NULL; |
2229 | struct ocfs2_xattr_block *xb = NULL; | |
2230 | struct ocfs2_xattr_entry *xe = NULL; | |
2231 | struct ocfs2_xattr_value_root *xv = NULL; | |
2232 | char *base = NULL; | |
2233 | int name_offset, name_len = 0; | |
2234 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2235 | xi->value_len); | |
2236 | u64 value_size; | |
2237 | ||
71d548a6 TM |
2238 | /* |
2239 | * Calculate the clusters we need to write. | |
2240 | * No matter whether we replace an old one or add a new one, | |
2241 | * we need this for writing. | |
2242 | */ | |
2243 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2244 | credits += new_clusters * | |
2245 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2246 | ||
78f30c31 | 2247 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2248 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2249 | ||
2250 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2251 | clusters_add += new_clusters; |
85db90e7 TM |
2252 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2253 | &def_xv.xv.xr_list, | |
2254 | new_clusters); | |
2255 | } | |
78f30c31 TM |
2256 | |
2257 | goto meta_guess; | |
2258 | } | |
2259 | ||
2260 | if (!xis->not_found) { | |
2261 | xe = xis->here; | |
2262 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2263 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2264 | base = xis->base; | |
85db90e7 | 2265 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2266 | } else { |
970e4936 | 2267 | int i, block_off = 0; |
78f30c31 TM |
2268 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2269 | xe = xbs->here; | |
2270 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2271 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2272 | i = xbs->here - xbs->header->xh_entries; | |
2273 | old_in_xb = 1; | |
2274 | ||
2275 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
2276 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2277 | bucket_xh(xbs->bucket), | |
2278 | i, &block_off, | |
2279 | &name_offset); | |
2280 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2281 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2282 | } else { | |
78f30c31 | 2283 | base = xbs->base; |
85db90e7 TM |
2284 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2285 | } | |
2286 | } | |
2287 | ||
2288 | /* | |
2289 | * delete a xattr doesn't need metadata and cluster allocation. | |
2290 | * so just calculate the credits and return. | |
2291 | * | |
2292 | * The credits for removing the value tree will be extended | |
2293 | * by ocfs2_remove_extent itself. | |
2294 | */ | |
2295 | if (!xi->value) { | |
2296 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2297 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2298 | |
2299 | goto out; | |
78f30c31 TM |
2300 | } |
2301 | ||
2302 | /* do cluster allocation guess first. */ | |
2303 | value_size = le64_to_cpu(xe->xe_value_size); | |
2304 | ||
2305 | if (old_in_xb) { | |
2306 | /* | |
2307 | * In xattr set, we always try to set the xe in inode first, | |
2308 | * so if it can be inserted into inode successfully, the old | |
2309 | * one will be removed from the xattr block, and this xattr | |
2310 | * will be inserted into inode as a new xattr in inode. | |
2311 | */ | |
2312 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2313 | clusters_add += new_clusters; | |
a90714c1 | 2314 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2315 | OCFS2_INODE_UPDATE_CREDITS; |
2316 | if (!ocfs2_xattr_is_local(xe)) | |
2317 | credits += ocfs2_calc_extend_credits( | |
2318 | inode->i_sb, | |
2319 | &def_xv.xv.xr_list, | |
2320 | new_clusters); | |
78f30c31 TM |
2321 | goto out; |
2322 | } | |
2323 | } | |
2324 | ||
2325 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2326 | /* the new values will be stored outside. */ | |
2327 | u32 old_clusters = 0; | |
2328 | ||
2329 | if (!ocfs2_xattr_is_local(xe)) { | |
2330 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2331 | value_size); | |
2332 | xv = (struct ocfs2_xattr_value_root *) | |
2333 | (base + name_offset + name_len); | |
97aff52a | 2334 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2335 | } else |
2336 | xv = &def_xv.xv; | |
2337 | ||
85db90e7 | 2338 | if (old_clusters >= new_clusters) { |
a90714c1 | 2339 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2340 | goto out; |
85db90e7 | 2341 | } else { |
78f30c31 TM |
2342 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2343 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2344 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2345 | &xv->xr_list, | |
2346 | new_clusters - | |
2347 | old_clusters); | |
97aff52a TM |
2348 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2349 | goto out; | |
78f30c31 TM |
2350 | } |
2351 | } else { | |
2352 | /* | |
2353 | * Now the new value will be stored inside. So if the new | |
2354 | * value is smaller than the size of value root or the old | |
2355 | * value, we don't need any allocation, otherwise we have | |
2356 | * to guess metadata allocation. | |
2357 | */ | |
2358 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2359 | (!ocfs2_xattr_is_local(xe) && | |
2360 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2361 | goto out; | |
2362 | } | |
2363 | ||
2364 | meta_guess: | |
2365 | /* calculate metadata allocation. */ | |
2366 | if (di->i_xattr_loc) { | |
2367 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2368 | ret = ocfs2_read_xattr_block(inode, |
2369 | le64_to_cpu(di->i_xattr_loc), | |
2370 | &bh); | |
78f30c31 TM |
2371 | if (ret) { |
2372 | mlog_errno(ret); | |
2373 | goto out; | |
2374 | } | |
2375 | ||
2376 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2377 | } else | |
2378 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2379 | ||
90cb546c TM |
2380 | /* |
2381 | * If there is already an xattr tree, good, we can calculate | |
2382 | * like other b-trees. Otherwise we may have the chance of | |
2383 | * create a tree, the credit calculation is borrowed from | |
2384 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2385 | * new tree will be cluster based, so no meta is needed. | |
2386 | */ | |
78f30c31 TM |
2387 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2388 | struct ocfs2_extent_list *el = | |
2389 | &xb->xb_attrs.xb_root.xt_list; | |
2390 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2391 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2392 | el, 1); | |
90cb546c TM |
2393 | } else |
2394 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2395 | |
2396 | /* | |
2397 | * This cluster will be used either for new bucket or for | |
2398 | * new xattr block. | |
2399 | * If the cluster size is the same as the bucket size, one | |
2400 | * more is needed since we may need to extend the bucket | |
2401 | * also. | |
2402 | */ | |
2403 | clusters_add += 1; | |
85db90e7 | 2404 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2405 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2406 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2407 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2408 | clusters_add += 1; |
85db90e7 TM |
2409 | } |
2410 | } else { | |
78f30c31 | 2411 | meta_add += 1; |
85db90e7 TM |
2412 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2413 | } | |
78f30c31 TM |
2414 | out: |
2415 | if (clusters_need) | |
2416 | *clusters_need = clusters_add; | |
2417 | if (meta_need) | |
2418 | *meta_need = meta_add; | |
85db90e7 TM |
2419 | if (credits_need) |
2420 | *credits_need = credits; | |
78f30c31 TM |
2421 | brelse(bh); |
2422 | return ret; | |
2423 | } | |
2424 | ||
2425 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2426 | struct ocfs2_dinode *di, | |
2427 | struct ocfs2_xattr_info *xi, | |
2428 | struct ocfs2_xattr_search *xis, | |
2429 | struct ocfs2_xattr_search *xbs, | |
85db90e7 TM |
2430 | struct ocfs2_xattr_set_ctxt *ctxt, |
2431 | int *credits) | |
78f30c31 TM |
2432 | { |
2433 | int clusters_add, meta_add, ret; | |
2434 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2435 | ||
2436 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2437 | ||
2438 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2439 | ||
2440 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2441 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2442 | if (ret) { |
2443 | mlog_errno(ret); | |
2444 | return ret; | |
2445 | } | |
2446 | ||
85db90e7 TM |
2447 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2448 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2449 | |
2450 | if (meta_add) { | |
2451 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2452 | &ctxt->meta_ac); | |
2453 | if (ret) { | |
2454 | mlog_errno(ret); | |
2455 | goto out; | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | if (clusters_add) { | |
2460 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2461 | if (ret) | |
2462 | mlog_errno(ret); | |
2463 | } | |
2464 | out: | |
2465 | if (ret) { | |
2466 | if (ctxt->meta_ac) { | |
2467 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2468 | ctxt->meta_ac = NULL; | |
2469 | } | |
2470 | ||
2471 | /* | |
2472 | * We cannot have an error and a non null ctxt->data_ac. | |
2473 | */ | |
2474 | } | |
2475 | ||
2476 | return ret; | |
2477 | } | |
2478 | ||
85db90e7 TM |
2479 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2480 | struct ocfs2_dinode *di, | |
2481 | struct ocfs2_xattr_info *xi, | |
2482 | struct ocfs2_xattr_search *xis, | |
2483 | struct ocfs2_xattr_search *xbs, | |
2484 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2485 | { | |
9f868f16 | 2486 | int ret = 0, credits, old_found; |
85db90e7 TM |
2487 | |
2488 | if (!xi->value) { | |
2489 | /* Remove existing extended attribute */ | |
2490 | if (!xis->not_found) | |
2491 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2492 | else if (!xbs->not_found) | |
2493 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2494 | } else { | |
2495 | /* We always try to set extended attribute into inode first*/ | |
2496 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2497 | if (!ret && !xbs->not_found) { | |
2498 | /* | |
2499 | * If succeed and that extended attribute existing in | |
2500 | * external block, then we will remove it. | |
2501 | */ | |
2502 | xi->value = NULL; | |
2503 | xi->value_len = 0; | |
2504 | ||
9f868f16 | 2505 | old_found = xis->not_found; |
85db90e7 TM |
2506 | xis->not_found = -ENODATA; |
2507 | ret = ocfs2_calc_xattr_set_need(inode, | |
2508 | di, | |
2509 | xi, | |
2510 | xis, | |
2511 | xbs, | |
2512 | NULL, | |
2513 | NULL, | |
2514 | &credits); | |
9f868f16 | 2515 | xis->not_found = old_found; |
85db90e7 TM |
2516 | if (ret) { |
2517 | mlog_errno(ret); | |
2518 | goto out; | |
2519 | } | |
2520 | ||
2521 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2522 | ctxt->handle->h_buffer_credits); | |
2523 | if (ret) { | |
2524 | mlog_errno(ret); | |
2525 | goto out; | |
2526 | } | |
2527 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2528 | } else if (ret == -ENOSPC) { | |
2529 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2530 | ret = ocfs2_xattr_block_find(inode, | |
2531 | xi->name_index, | |
2532 | xi->name, xbs); | |
2533 | if (ret) | |
2534 | goto out; | |
2535 | ||
9f868f16 | 2536 | old_found = xis->not_found; |
85db90e7 TM |
2537 | xis->not_found = -ENODATA; |
2538 | ret = ocfs2_calc_xattr_set_need(inode, | |
2539 | di, | |
2540 | xi, | |
2541 | xis, | |
2542 | xbs, | |
2543 | NULL, | |
2544 | NULL, | |
2545 | &credits); | |
9f868f16 | 2546 | xis->not_found = old_found; |
85db90e7 TM |
2547 | if (ret) { |
2548 | mlog_errno(ret); | |
2549 | goto out; | |
2550 | } | |
2551 | ||
2552 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2553 | ctxt->handle->h_buffer_credits); | |
2554 | if (ret) { | |
2555 | mlog_errno(ret); | |
2556 | goto out; | |
2557 | } | |
2558 | } | |
2559 | /* | |
2560 | * If no space in inode, we will set extended attribute | |
2561 | * into external block. | |
2562 | */ | |
2563 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2564 | if (ret) | |
2565 | goto out; | |
2566 | if (!xis->not_found) { | |
2567 | /* | |
2568 | * If succeed and that extended attribute | |
2569 | * existing in inode, we will remove it. | |
2570 | */ | |
2571 | xi->value = NULL; | |
2572 | xi->value_len = 0; | |
2573 | xbs->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); | |
2582 | if (ret) { | |
2583 | mlog_errno(ret); | |
2584 | goto out; | |
2585 | } | |
2586 | ||
2587 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2588 | ctxt->handle->h_buffer_credits); | |
2589 | if (ret) { | |
2590 | mlog_errno(ret); | |
2591 | goto out; | |
2592 | } | |
2593 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2594 | xis, ctxt); | |
2595 | } | |
2596 | } | |
2597 | } | |
2598 | ||
4b3f6209 TM |
2599 | if (!ret) { |
2600 | /* Update inode ctime. */ | |
89a907af TM |
2601 | ret = ocfs2_journal_access_di(ctxt->handle, inode, |
2602 | xis->inode_bh, | |
2603 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2604 | if (ret) { |
2605 | mlog_errno(ret); | |
2606 | goto out; | |
2607 | } | |
2608 | ||
2609 | inode->i_ctime = CURRENT_TIME; | |
2610 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2611 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2612 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2613 | } | |
85db90e7 TM |
2614 | out: |
2615 | return ret; | |
2616 | } | |
2617 | ||
6c3faba4 TY |
2618 | /* |
2619 | * This function only called duing creating inode | |
2620 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2621 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2622 | */ |
2623 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2624 | struct inode *inode, | |
2625 | struct buffer_head *di_bh, | |
2626 | int name_index, | |
2627 | const char *name, | |
2628 | const void *value, | |
2629 | size_t value_len, | |
2630 | int flags, | |
2631 | struct ocfs2_alloc_context *meta_ac, | |
2632 | struct ocfs2_alloc_context *data_ac) | |
2633 | { | |
2634 | struct ocfs2_dinode *di; | |
2635 | int ret; | |
2636 | ||
2637 | struct ocfs2_xattr_info xi = { | |
2638 | .name_index = name_index, | |
2639 | .name = name, | |
2640 | .value = value, | |
2641 | .value_len = value_len, | |
2642 | }; | |
2643 | ||
2644 | struct ocfs2_xattr_search xis = { | |
2645 | .not_found = -ENODATA, | |
2646 | }; | |
2647 | ||
2648 | struct ocfs2_xattr_search xbs = { | |
2649 | .not_found = -ENODATA, | |
2650 | }; | |
2651 | ||
2652 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2653 | .handle = handle, | |
2654 | .meta_ac = meta_ac, | |
2655 | .data_ac = data_ac, | |
2656 | }; | |
2657 | ||
2658 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2659 | return -EOPNOTSUPP; | |
2660 | ||
008aafaf TY |
2661 | /* |
2662 | * In extreme situation, may need xattr bucket when | |
2663 | * block size is too small. And we have already reserved | |
2664 | * the credits for bucket in mknod. | |
2665 | */ | |
2666 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2667 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2668 | if (!xbs.bucket) { | |
2669 | mlog_errno(-ENOMEM); | |
2670 | return -ENOMEM; | |
2671 | } | |
2672 | } | |
2673 | ||
6c3faba4 TY |
2674 | xis.inode_bh = xbs.inode_bh = di_bh; |
2675 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2676 | ||
2677 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2678 | ||
2679 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2680 | if (ret) | |
2681 | goto cleanup; | |
2682 | if (xis.not_found) { | |
2683 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2684 | if (ret) | |
2685 | goto cleanup; | |
2686 | } | |
2687 | ||
2688 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2689 | ||
2690 | cleanup: | |
2691 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2692 | brelse(xbs.xattr_bh); | |
008aafaf | 2693 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2694 | |
2695 | return ret; | |
2696 | } | |
2697 | ||
cf1d6c76 TY |
2698 | /* |
2699 | * ocfs2_xattr_set() | |
2700 | * | |
2701 | * Set, replace or remove an extended attribute for this inode. | |
2702 | * value is NULL to remove an existing extended attribute, else either | |
2703 | * create or replace an extended attribute. | |
2704 | */ | |
2705 | int ocfs2_xattr_set(struct inode *inode, | |
2706 | int name_index, | |
2707 | const char *name, | |
2708 | const void *value, | |
2709 | size_t value_len, | |
2710 | int flags) | |
2711 | { | |
2712 | struct buffer_head *di_bh = NULL; | |
2713 | struct ocfs2_dinode *di; | |
85db90e7 | 2714 | int ret, credits; |
78f30c31 | 2715 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2716 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2717 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
cf1d6c76 TY |
2718 | |
2719 | struct ocfs2_xattr_info xi = { | |
2720 | .name_index = name_index, | |
2721 | .name = name, | |
2722 | .value = value, | |
2723 | .value_len = value_len, | |
2724 | }; | |
2725 | ||
2726 | struct ocfs2_xattr_search xis = { | |
2727 | .not_found = -ENODATA, | |
2728 | }; | |
2729 | ||
2730 | struct ocfs2_xattr_search xbs = { | |
2731 | .not_found = -ENODATA, | |
2732 | }; | |
2733 | ||
8154da3d TY |
2734 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2735 | return -EOPNOTSUPP; | |
2736 | ||
ba937127 JB |
2737 | /* |
2738 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2739 | * bucket. | |
2740 | */ | |
2741 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2742 | if (!xbs.bucket) { | |
2743 | mlog_errno(-ENOMEM); | |
2744 | return -ENOMEM; | |
2745 | } | |
2746 | ||
cf1d6c76 TY |
2747 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2748 | if (ret < 0) { | |
2749 | mlog_errno(ret); | |
ba937127 | 2750 | goto cleanup_nolock; |
cf1d6c76 TY |
2751 | } |
2752 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2753 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2754 | ||
2755 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2756 | /* | |
2757 | * Scan inode and external block to find the same name | |
2758 | * extended attribute and collect search infomation. | |
2759 | */ | |
2760 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2761 | if (ret) | |
2762 | goto cleanup; | |
2763 | if (xis.not_found) { | |
2764 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2765 | if (ret) | |
2766 | goto cleanup; | |
2767 | } | |
2768 | ||
2769 | if (xis.not_found && xbs.not_found) { | |
2770 | ret = -ENODATA; | |
2771 | if (flags & XATTR_REPLACE) | |
2772 | goto cleanup; | |
2773 | ret = 0; | |
2774 | if (!value) | |
2775 | goto cleanup; | |
2776 | } else { | |
2777 | ret = -EEXIST; | |
2778 | if (flags & XATTR_CREATE) | |
2779 | goto cleanup; | |
2780 | } | |
2781 | ||
85db90e7 TM |
2782 | |
2783 | mutex_lock(&tl_inode->i_mutex); | |
2784 | ||
2785 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2786 | ret = __ocfs2_flush_truncate_log(osb); | |
2787 | if (ret < 0) { | |
2788 | mutex_unlock(&tl_inode->i_mutex); | |
2789 | mlog_errno(ret); | |
2790 | goto cleanup; | |
2791 | } | |
2792 | } | |
2793 | mutex_unlock(&tl_inode->i_mutex); | |
2794 | ||
2795 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
2796 | &xbs, &ctxt, &credits); | |
78f30c31 TM |
2797 | if (ret) { |
2798 | mlog_errno(ret); | |
2799 | goto cleanup; | |
2800 | } | |
2801 | ||
4b3f6209 TM |
2802 | /* we need to update inode's ctime field, so add credit for it. */ |
2803 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
85db90e7 TM |
2804 | ctxt.handle = ocfs2_start_trans(osb, credits); |
2805 | if (IS_ERR(ctxt.handle)) { | |
2806 | ret = PTR_ERR(ctxt.handle); | |
2807 | mlog_errno(ret); | |
2808 | goto cleanup; | |
cf1d6c76 | 2809 | } |
85db90e7 TM |
2810 | |
2811 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2812 | ||
2813 | ocfs2_commit_trans(osb, ctxt.handle); | |
2814 | ||
78f30c31 TM |
2815 | if (ctxt.data_ac) |
2816 | ocfs2_free_alloc_context(ctxt.data_ac); | |
2817 | if (ctxt.meta_ac) | |
2818 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2819 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
2820 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
2821 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2822 | cleanup: |
2823 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2824 | ocfs2_inode_unlock(inode, 1); | |
ba937127 | 2825 | cleanup_nolock: |
cf1d6c76 TY |
2826 | brelse(di_bh); |
2827 | brelse(xbs.xattr_bh); | |
ba937127 | 2828 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
2829 | |
2830 | return ret; | |
2831 | } | |
2832 | ||
0c044f0b TM |
2833 | /* |
2834 | * Find the xattr extent rec which may contains name_hash. | |
2835 | * e_cpos will be the first name hash of the xattr rec. | |
2836 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
2837 | */ | |
2838 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
2839 | u32 name_hash, | |
2840 | u64 *p_blkno, | |
2841 | u32 *e_cpos, | |
2842 | u32 *num_clusters, | |
2843 | struct ocfs2_extent_list *el) | |
2844 | { | |
2845 | int ret = 0, i; | |
2846 | struct buffer_head *eb_bh = NULL; | |
2847 | struct ocfs2_extent_block *eb; | |
2848 | struct ocfs2_extent_rec *rec = NULL; | |
2849 | u64 e_blkno = 0; | |
2850 | ||
2851 | if (el->l_tree_depth) { | |
2852 | ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); | |
2853 | if (ret) { | |
2854 | mlog_errno(ret); | |
2855 | goto out; | |
2856 | } | |
2857 | ||
2858 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
2859 | el = &eb->h_list; | |
2860 | ||
2861 | if (el->l_tree_depth) { | |
2862 | ocfs2_error(inode->i_sb, | |
2863 | "Inode %lu has non zero tree depth in " | |
2864 | "xattr tree block %llu\n", inode->i_ino, | |
2865 | (unsigned long long)eb_bh->b_blocknr); | |
2866 | ret = -EROFS; | |
2867 | goto out; | |
2868 | } | |
2869 | } | |
2870 | ||
2871 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
2872 | rec = &el->l_recs[i]; | |
2873 | ||
2874 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
2875 | e_blkno = le64_to_cpu(rec->e_blkno); | |
2876 | break; | |
2877 | } | |
2878 | } | |
2879 | ||
2880 | if (!e_blkno) { | |
2881 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
2882 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
2883 | le32_to_cpu(rec->e_cpos), | |
2884 | ocfs2_rec_clusters(el, rec)); | |
2885 | ret = -EROFS; | |
2886 | goto out; | |
2887 | } | |
2888 | ||
2889 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
2890 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
2891 | if (e_cpos) | |
2892 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
2893 | out: | |
2894 | brelse(eb_bh); | |
2895 | return ret; | |
2896 | } | |
2897 | ||
2898 | typedef int (xattr_bucket_func)(struct inode *inode, | |
2899 | struct ocfs2_xattr_bucket *bucket, | |
2900 | void *para); | |
2901 | ||
589dc260 | 2902 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 2903 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
2904 | int name_index, |
2905 | const char *name, | |
2906 | u32 name_hash, | |
2907 | u16 *xe_index, | |
2908 | int *found) | |
2909 | { | |
2910 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 2911 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
2912 | size_t name_len = strlen(name); |
2913 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
2914 | char *xe_name; |
2915 | ||
2916 | /* | |
2917 | * We don't use binary search in the bucket because there | |
2918 | * may be multiple entries with the same name hash. | |
2919 | */ | |
2920 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
2921 | xe = &xh->xh_entries[i]; | |
2922 | ||
2923 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
2924 | continue; | |
2925 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
2926 | break; | |
2927 | ||
2928 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
2929 | if (!cmp) | |
2930 | cmp = name_len - xe->xe_name_len; | |
2931 | if (cmp) | |
2932 | continue; | |
2933 | ||
2934 | ret = ocfs2_xattr_bucket_get_name_value(inode, | |
2935 | xh, | |
2936 | i, | |
2937 | &block_off, | |
2938 | &new_offset); | |
2939 | if (ret) { | |
2940 | mlog_errno(ret); | |
2941 | break; | |
2942 | } | |
2943 | ||
970e4936 | 2944 | |
e2356a3f JB |
2945 | xe_name = bucket_block(bucket, block_off) + new_offset; |
2946 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
2947 | *xe_index = i; |
2948 | *found = 1; | |
2949 | ret = 0; | |
2950 | break; | |
2951 | } | |
2952 | } | |
2953 | ||
2954 | return ret; | |
2955 | } | |
2956 | ||
2957 | /* | |
2958 | * Find the specified xattr entry in a series of buckets. | |
2959 | * This series start from p_blkno and last for num_clusters. | |
2960 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
2961 | * the num of the valid buckets. | |
2962 | * | |
2963 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
2964 | * hash is in the gap of 2 buckets, return the lower bucket. | |
2965 | */ | |
2966 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
2967 | int name_index, | |
2968 | const char *name, | |
2969 | u32 name_hash, | |
2970 | u64 p_blkno, | |
2971 | u32 first_hash, | |
2972 | u32 num_clusters, | |
2973 | struct ocfs2_xattr_search *xs) | |
2974 | { | |
2975 | int ret, found = 0; | |
589dc260 TM |
2976 | struct ocfs2_xattr_header *xh = NULL; |
2977 | struct ocfs2_xattr_entry *xe = NULL; | |
2978 | u16 index = 0; | |
2979 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
2980 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 2981 | struct ocfs2_xattr_bucket *search; |
589dc260 | 2982 | u32 last_hash; |
e2356a3f | 2983 | u64 blkno, lower_blkno = 0; |
589dc260 | 2984 | |
e2356a3f JB |
2985 | search = ocfs2_xattr_bucket_new(inode); |
2986 | if (!search) { | |
2987 | ret = -ENOMEM; | |
2988 | mlog_errno(ret); | |
2989 | goto out; | |
2990 | } | |
2991 | ||
2992 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
2993 | if (ret) { |
2994 | mlog_errno(ret); | |
2995 | goto out; | |
2996 | } | |
2997 | ||
e2356a3f | 2998 | xh = bucket_xh(search); |
589dc260 | 2999 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3000 | while (low_bucket <= high_bucket) { |
e2356a3f | 3001 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3002 | |
e2356a3f | 3003 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3004 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3005 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3006 | if (ret) { |
3007 | mlog_errno(ret); | |
3008 | goto out; | |
3009 | } | |
3010 | ||
e2356a3f | 3011 | xh = bucket_xh(search); |
589dc260 TM |
3012 | xe = &xh->xh_entries[0]; |
3013 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3014 | high_bucket = bucket - 1; | |
3015 | continue; | |
3016 | } | |
3017 | ||
3018 | /* | |
3019 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3020 | * bucket is larger than the search one. for an empty |
3021 | * bucket, the last one is also the first one. | |
589dc260 | 3022 | */ |
5a095611 TM |
3023 | if (xh->xh_count) |
3024 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3025 | ||
589dc260 TM |
3026 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3027 | ||
e2356a3f JB |
3028 | /* record lower_blkno which may be the insert place. */ |
3029 | lower_blkno = blkno; | |
589dc260 TM |
3030 | |
3031 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3032 | low_bucket = bucket + 1; | |
3033 | continue; | |
3034 | } | |
3035 | ||
3036 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3037 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3038 | name_index, name, name_hash, |
3039 | &index, &found); | |
3040 | if (ret) { | |
3041 | mlog_errno(ret); | |
3042 | goto out; | |
3043 | } | |
3044 | break; | |
3045 | } | |
3046 | ||
3047 | /* | |
3048 | * Record the bucket we have found. | |
3049 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3050 | * always set it to the previous bucket. | |
3051 | */ | |
e2356a3f JB |
3052 | if (!lower_blkno) |
3053 | lower_blkno = p_blkno; | |
3054 | ||
3055 | /* This should be in cache - we just read it during the search */ | |
3056 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3057 | if (ret) { | |
3058 | mlog_errno(ret); | |
3059 | goto out; | |
589dc260 | 3060 | } |
589dc260 | 3061 | |
ba937127 JB |
3062 | xs->header = bucket_xh(xs->bucket); |
3063 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3064 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3065 | ||
3066 | if (found) { | |
589dc260 TM |
3067 | xs->here = &xs->header->xh_entries[index]; |
3068 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3069 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3070 | } else |
3071 | ret = -ENODATA; | |
3072 | ||
3073 | out: | |
e2356a3f | 3074 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3075 | return ret; |
3076 | } | |
3077 | ||
3078 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3079 | struct buffer_head *root_bh, | |
3080 | int name_index, | |
3081 | const char *name, | |
3082 | struct ocfs2_xattr_search *xs) | |
3083 | { | |
3084 | int ret; | |
3085 | struct ocfs2_xattr_block *xb = | |
3086 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3087 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3088 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3089 | u64 p_blkno = 0; | |
3090 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3091 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3092 | |
3093 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3094 | return -ENODATA; | |
3095 | ||
3096 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3097 | name, name_hash, name_index); | |
3098 | ||
3099 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3100 | &num_clusters, el); | |
3101 | if (ret) { | |
3102 | mlog_errno(ret); | |
3103 | goto out; | |
3104 | } | |
3105 | ||
3106 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3107 | ||
3108 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3109 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3110 | first_hash); | |
589dc260 TM |
3111 | |
3112 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3113 | p_blkno, first_hash, num_clusters, xs); | |
3114 | ||
3115 | out: | |
3116 | return ret; | |
3117 | } | |
3118 | ||
0c044f0b TM |
3119 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3120 | u64 blkno, | |
3121 | u32 clusters, | |
3122 | xattr_bucket_func *func, | |
3123 | void *para) | |
3124 | { | |
6dde41d9 | 3125 | int i, ret = 0; |
0c044f0b TM |
3126 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3127 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3128 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3129 | |
ba937127 JB |
3130 | bucket = ocfs2_xattr_bucket_new(inode); |
3131 | if (!bucket) { | |
3132 | mlog_errno(-ENOMEM); | |
3133 | return -ENOMEM; | |
3134 | } | |
0c044f0b TM |
3135 | |
3136 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3137 | clusters, (unsigned long long)blkno); |
0c044f0b | 3138 | |
ba937127 JB |
3139 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3140 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3141 | if (ret) { |
3142 | mlog_errno(ret); | |
ba937127 | 3143 | break; |
0c044f0b TM |
3144 | } |
3145 | ||
0c044f0b TM |
3146 | /* |
3147 | * The real bucket num in this series of blocks is stored | |
3148 | * in the 1st bucket. | |
3149 | */ | |
3150 | if (i == 0) | |
ba937127 | 3151 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3152 | |
de29c085 MF |
3153 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3154 | (unsigned long long)blkno, | |
ba937127 | 3155 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3156 | if (func) { |
ba937127 | 3157 | ret = func(inode, bucket, para); |
a46fa684 | 3158 | if (ret && ret != -ERANGE) |
0c044f0b | 3159 | mlog_errno(ret); |
ba937127 | 3160 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3161 | } |
3162 | ||
ba937127 JB |
3163 | ocfs2_xattr_bucket_relse(bucket); |
3164 | if (ret) | |
3165 | break; | |
0c044f0b TM |
3166 | } |
3167 | ||
ba937127 | 3168 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3169 | return ret; |
3170 | } | |
3171 | ||
3172 | struct ocfs2_xattr_tree_list { | |
3173 | char *buffer; | |
3174 | size_t buffer_size; | |
936b8834 | 3175 | size_t result; |
0c044f0b TM |
3176 | }; |
3177 | ||
3178 | static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, | |
3179 | struct ocfs2_xattr_header *xh, | |
3180 | int index, | |
3181 | int *block_off, | |
3182 | int *new_offset) | |
3183 | { | |
3184 | u16 name_offset; | |
3185 | ||
3186 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3187 | return -EINVAL; | |
3188 | ||
3189 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3190 | ||
3191 | *block_off = name_offset >> inode->i_sb->s_blocksize_bits; | |
3192 | *new_offset = name_offset % inode->i_sb->s_blocksize; | |
3193 | ||
3194 | return 0; | |
3195 | } | |
3196 | ||
3197 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3198 | struct ocfs2_xattr_bucket *bucket, | |
3199 | void *para) | |
3200 | { | |
936b8834 | 3201 | int ret = 0, type; |
0c044f0b | 3202 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3203 | int i, block_off, new_offset; |
936b8834 | 3204 | const char *prefix, *name; |
0c044f0b | 3205 | |
3e632946 JB |
3206 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3207 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3208 | type = ocfs2_xattr_get_type(entry); |
3209 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3210 | |
936b8834 | 3211 | if (prefix) { |
0c044f0b | 3212 | ret = ocfs2_xattr_bucket_get_name_value(inode, |
3e632946 | 3213 | bucket_xh(bucket), |
0c044f0b TM |
3214 | i, |
3215 | &block_off, | |
3216 | &new_offset); | |
3217 | if (ret) | |
3218 | break; | |
936b8834 | 3219 | |
51def39f | 3220 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3221 | new_offset; |
3222 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3223 | xl->buffer_size, | |
3224 | &xl->result, | |
3225 | prefix, name, | |
3226 | entry->xe_name_len); | |
3227 | if (ret) | |
3228 | break; | |
0c044f0b TM |
3229 | } |
3230 | } | |
3231 | ||
3232 | return ret; | |
3233 | } | |
3234 | ||
3235 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3236 | struct ocfs2_xattr_tree_root *xt, | |
3237 | char *buffer, | |
3238 | size_t buffer_size) | |
3239 | { | |
3240 | struct ocfs2_extent_list *el = &xt->xt_list; | |
3241 | int ret = 0; | |
3242 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3243 | u64 p_blkno = 0; | |
3244 | struct ocfs2_xattr_tree_list xl = { | |
3245 | .buffer = buffer, | |
3246 | .buffer_size = buffer_size, | |
936b8834 | 3247 | .result = 0, |
0c044f0b TM |
3248 | }; |
3249 | ||
3250 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3251 | return 0; | |
3252 | ||
3253 | while (name_hash > 0) { | |
3254 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3255 | &e_cpos, &num_clusters, el); | |
3256 | if (ret) { | |
3257 | mlog_errno(ret); | |
3258 | goto out; | |
3259 | } | |
3260 | ||
3261 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
3262 | ocfs2_list_xattr_bucket, | |
3263 | &xl); | |
3264 | if (ret) { | |
a46fa684 TM |
3265 | if (ret != -ERANGE) |
3266 | mlog_errno(ret); | |
0c044f0b TM |
3267 | goto out; |
3268 | } | |
3269 | ||
3270 | if (e_cpos == 0) | |
3271 | break; | |
3272 | ||
3273 | name_hash = e_cpos - 1; | |
3274 | } | |
3275 | ||
936b8834 | 3276 | ret = xl.result; |
0c044f0b TM |
3277 | out: |
3278 | return ret; | |
3279 | } | |
01225596 TM |
3280 | |
3281 | static int cmp_xe(const void *a, const void *b) | |
3282 | { | |
3283 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3284 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3285 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3286 | ||
3287 | if (l_hash > r_hash) | |
3288 | return 1; | |
3289 | if (l_hash < r_hash) | |
3290 | return -1; | |
3291 | return 0; | |
3292 | } | |
3293 | ||
3294 | static void swap_xe(void *a, void *b, int size) | |
3295 | { | |
3296 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3297 | ||
3298 | tmp = *l; | |
3299 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3300 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3301 | } | |
3302 | ||
3303 | /* | |
3304 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3305 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3306 | * The header goes at the start of the bucket, and the names+values are |
3307 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3308 | * Note: we need to sort the entries since they are not saved in order |
3309 | * in the ocfs2_xattr_block. | |
3310 | */ | |
3311 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3312 | struct buffer_head *xb_bh, | |
178eeac3 | 3313 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3314 | { |
3315 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3316 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3317 | u16 offset, size, off_change; |
3318 | struct ocfs2_xattr_entry *xe; | |
3319 | struct ocfs2_xattr_block *xb = | |
3320 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3321 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3322 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3323 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3324 | char *src = xb_bh->b_data; |
3325 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3326 | |
3327 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3328 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3329 | (unsigned long long)bucket_blkno(bucket)); |
3330 | ||
3331 | for (i = 0; i < blks; i++) | |
3332 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3333 | |
01225596 TM |
3334 | /* |
3335 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3336 | * there is a offset change corresponding to the change of | |
3337 | * ocfs2_xattr_header's position. | |
3338 | */ | |
3339 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3340 | xe = &xb_xh->xh_entries[count - 1]; | |
3341 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3342 | size = blocksize - offset; | |
3343 | ||
3344 | /* copy all the names and values. */ | |
01225596 TM |
3345 | memcpy(target + offset, src + offset, size); |
3346 | ||
3347 | /* Init new header now. */ | |
3348 | xh->xh_count = xb_xh->xh_count; | |
3349 | xh->xh_num_buckets = cpu_to_le16(1); | |
3350 | xh->xh_name_value_len = cpu_to_le16(size); | |
3351 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3352 | ||
3353 | /* copy all the entries. */ | |
178eeac3 | 3354 | target = bucket_block(bucket, 0); |
01225596 TM |
3355 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3356 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3357 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3358 | ||
3359 | /* Change the xe offset for all the xe because of the move. */ | |
3360 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3361 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3362 | for (i = 0; i < count; i++) | |
3363 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3364 | ||
3365 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3366 | offset, size, off_change); | |
3367 | ||
3368 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3369 | cmp_xe, swap_xe); | |
3370 | } | |
3371 | ||
3372 | /* | |
3373 | * After we move xattr from block to index btree, we have to | |
3374 | * update ocfs2_xattr_search to the new xe and base. | |
3375 | * | |
3376 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3377 | * While if the entry is in index b-tree, "bucket" indicates the | |
3378 | * real place of the xattr. | |
3379 | */ | |
178eeac3 JB |
3380 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3381 | struct ocfs2_xattr_search *xs, | |
3382 | struct buffer_head *old_bh) | |
01225596 | 3383 | { |
01225596 TM |
3384 | char *buf = old_bh->b_data; |
3385 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3386 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3387 | int i; |
01225596 | 3388 | |
ba937127 | 3389 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3390 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3391 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3392 | ||
178eeac3 JB |
3393 | if (xs->not_found) |
3394 | return; | |
01225596 | 3395 | |
178eeac3 JB |
3396 | i = xs->here - old_xh->xh_entries; |
3397 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3398 | } |
3399 | ||
3400 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3401 | struct ocfs2_xattr_search *xs, |
3402 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3403 | { |
85db90e7 | 3404 | int ret; |
01225596 TM |
3405 | u32 bit_off, len; |
3406 | u64 blkno; | |
85db90e7 | 3407 | handle_t *handle = ctxt->handle; |
01225596 TM |
3408 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3409 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3410 | struct buffer_head *xb_bh = xs->xattr_bh; |
3411 | struct ocfs2_xattr_block *xb = | |
3412 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3413 | struct ocfs2_xattr_tree_root *xr; | |
3414 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3415 | |
3416 | mlog(0, "create xattr index block for %llu\n", | |
3417 | (unsigned long long)xb_bh->b_blocknr); | |
3418 | ||
3419 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3420 | BUG_ON(!xs->bucket); |
01225596 | 3421 | |
01225596 TM |
3422 | /* |
3423 | * XXX: | |
3424 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3425 | * if performance becomes a problem later. | |
3426 | */ | |
3427 | down_write(&oi->ip_alloc_sem); | |
3428 | ||
84008972 JB |
3429 | ret = ocfs2_journal_access_xb(handle, inode, xb_bh, |
3430 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
3431 | if (ret) { |
3432 | mlog_errno(ret); | |
85db90e7 | 3433 | goto out; |
01225596 TM |
3434 | } |
3435 | ||
78f30c31 TM |
3436 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3437 | 1, 1, &bit_off, &len); | |
01225596 TM |
3438 | if (ret) { |
3439 | mlog_errno(ret); | |
85db90e7 | 3440 | goto out; |
01225596 TM |
3441 | } |
3442 | ||
3443 | /* | |
3444 | * The bucket may spread in many blocks, and | |
3445 | * we will only touch the 1st block and the last block | |
3446 | * in the whole bucket(one for entry and one for data). | |
3447 | */ | |
3448 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3449 | ||
de29c085 MF |
3450 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3451 | (unsigned long long)blkno); | |
01225596 | 3452 | |
178eeac3 JB |
3453 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3454 | if (ret) { | |
01225596 | 3455 | mlog_errno(ret); |
85db90e7 | 3456 | goto out; |
01225596 TM |
3457 | } |
3458 | ||
178eeac3 JB |
3459 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3460 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3461 | if (ret) { |
3462 | mlog_errno(ret); | |
85db90e7 | 3463 | goto out; |
01225596 TM |
3464 | } |
3465 | ||
178eeac3 JB |
3466 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3467 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3468 | |
178eeac3 | 3469 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3470 | |
3471 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3472 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3473 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3474 | ||
3475 | xr = &xb->xb_attrs.xb_root; | |
3476 | xr->xt_clusters = cpu_to_le32(1); | |
3477 | xr->xt_last_eb_blk = 0; | |
3478 | xr->xt_list.l_tree_depth = 0; | |
3479 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3480 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3481 | ||
3482 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3483 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3484 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3485 | ||
3486 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3487 | ||
85db90e7 | 3488 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3489 | |
85db90e7 | 3490 | out: |
01225596 TM |
3491 | up_write(&oi->ip_alloc_sem); |
3492 | ||
01225596 TM |
3493 | return ret; |
3494 | } | |
3495 | ||
3496 | static int cmp_xe_offset(const void *a, const void *b) | |
3497 | { | |
3498 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3499 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3500 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3501 | ||
3502 | if (l_name_offset < r_name_offset) | |
3503 | return 1; | |
3504 | if (l_name_offset > r_name_offset) | |
3505 | return -1; | |
3506 | return 0; | |
3507 | } | |
3508 | ||
3509 | /* | |
3510 | * defrag a xattr bucket if we find that the bucket has some | |
3511 | * holes beteen name/value pairs. | |
3512 | * We will move all the name/value pairs to the end of the bucket | |
3513 | * so that we can spare some space for insertion. | |
3514 | */ | |
3515 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3516 | handle_t *handle, |
01225596 TM |
3517 | struct ocfs2_xattr_bucket *bucket) |
3518 | { | |
3519 | int ret, i; | |
3520 | size_t end, offset, len, value_len; | |
3521 | struct ocfs2_xattr_header *xh; | |
3522 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3523 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3524 | u16 xh_free_start; |
01225596 | 3525 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3526 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3527 | |
3528 | /* | |
3529 | * In order to make the operation more efficient and generic, | |
3530 | * we copy all the blocks into a contiguous memory and do the | |
3531 | * defragment there, so if anything is error, we will not touch | |
3532 | * the real block. | |
3533 | */ | |
3534 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3535 | if (!bucket_buf) { | |
3536 | ret = -EIO; | |
3537 | goto out; | |
3538 | } | |
3539 | ||
3540 | buf = bucket_buf; | |
1c32a2fd TM |
3541 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3542 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3543 | |
1c32a2fd | 3544 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3545 | OCFS2_JOURNAL_ACCESS_WRITE); |
3546 | if (ret < 0) { | |
3547 | mlog_errno(ret); | |
85db90e7 | 3548 | goto out; |
01225596 TM |
3549 | } |
3550 | ||
3551 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3552 | entries = (char *)xh->xh_entries; | |
3553 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3554 | ||
3555 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3556 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3557 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3558 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3559 | |
3560 | /* | |
3561 | * sort all the entries by their offset. | |
3562 | * the largest will be the first, so that we can | |
3563 | * move them to the end one by one. | |
3564 | */ | |
3565 | sort(entries, le16_to_cpu(xh->xh_count), | |
3566 | sizeof(struct ocfs2_xattr_entry), | |
3567 | cmp_xe_offset, swap_xe); | |
3568 | ||
3569 | /* Move all name/values to the end of the bucket. */ | |
3570 | xe = xh->xh_entries; | |
3571 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3572 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3573 | offset = le16_to_cpu(xe->xe_name_offset); | |
3574 | if (ocfs2_xattr_is_local(xe)) | |
3575 | value_len = OCFS2_XATTR_SIZE( | |
3576 | le64_to_cpu(xe->xe_value_size)); | |
3577 | else | |
3578 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3579 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3580 | ||
3581 | /* | |
3582 | * We must make sure that the name/value pair | |
3583 | * exist in the same block. So adjust end to | |
3584 | * the previous block end if needed. | |
3585 | */ | |
3586 | if (((end - len) / blocksize != | |
3587 | (end - 1) / blocksize)) | |
3588 | end = end - end % blocksize; | |
3589 | ||
3590 | if (end > offset + len) { | |
3591 | memmove(bucket_buf + end - len, | |
3592 | bucket_buf + offset, len); | |
3593 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3594 | } | |
3595 | ||
3596 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3597 | "bucket %llu\n", (unsigned long long)blkno); | |
3598 | ||
3599 | end -= len; | |
3600 | } | |
3601 | ||
3602 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3603 | "bucket %llu\n", (unsigned long long)blkno); | |
3604 | ||
3605 | if (xh_free_start == end) | |
85db90e7 | 3606 | goto out; |
01225596 TM |
3607 | |
3608 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3609 | xh->xh_free_start = cpu_to_le16(end); | |
3610 | ||
3611 | /* sort the entries by their name_hash. */ | |
3612 | sort(entries, le16_to_cpu(xh->xh_count), | |
3613 | sizeof(struct ocfs2_xattr_entry), | |
3614 | cmp_xe, swap_xe); | |
3615 | ||
3616 | buf = bucket_buf; | |
1c32a2fd TM |
3617 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3618 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3619 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3620 | |
01225596 | 3621 | out: |
01225596 TM |
3622 | kfree(bucket_buf); |
3623 | return ret; | |
3624 | } | |
3625 | ||
3626 | /* | |
b5c03e74 JB |
3627 | * prev_blkno points to the start of an existing extent. new_blkno |
3628 | * points to a newly allocated extent. Because we know each of our | |
3629 | * clusters contains more than bucket, we can easily split one cluster | |
3630 | * at a bucket boundary. So we take the last cluster of the existing | |
3631 | * extent and split it down the middle. We move the last half of the | |
3632 | * buckets in the last cluster of the existing extent over to the new | |
3633 | * extent. | |
01225596 | 3634 | * |
b5c03e74 JB |
3635 | * first_bh is the buffer at prev_blkno so we can update the existing |
3636 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3637 | * to insert our xattr. If the bucket move places the target in the new | |
3638 | * extent, we'll update first_bh and header_bh after modifying the old | |
3639 | * extent. | |
3640 | * | |
3641 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3642 | */ |
3643 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3644 | handle_t *handle, | |
41cb8148 JB |
3645 | struct ocfs2_xattr_bucket *first, |
3646 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3647 | u64 new_blkno, |
01225596 TM |
3648 | u32 num_clusters, |
3649 | u32 *first_hash) | |
3650 | { | |
c58b6032 | 3651 | int ret; |
41cb8148 JB |
3652 | struct super_block *sb = inode->i_sb; |
3653 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3654 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3655 | int to_move = num_buckets / 2; |
c58b6032 | 3656 | u64 src_blkno; |
41cb8148 JB |
3657 | u64 last_cluster_blkno = bucket_blkno(first) + |
3658 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3659 | |
41cb8148 JB |
3660 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3661 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3662 | |
01225596 | 3663 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3664 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3665 | |
41cb8148 | 3666 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3667 | last_cluster_blkno, new_blkno, |
3668 | to_move, first_hash); | |
01225596 TM |
3669 | if (ret) { |
3670 | mlog_errno(ret); | |
3671 | goto out; | |
3672 | } | |
3673 | ||
c58b6032 JB |
3674 | /* This is the first bucket that got moved */ |
3675 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3676 | |
b5c03e74 | 3677 | /* |
c58b6032 | 3678 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3679 | * update first and target. |
b5c03e74 | 3680 | */ |
41cb8148 | 3681 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3682 | /* Find the block for the new target bucket */ |
3683 | src_blkno = new_blkno + | |
41cb8148 JB |
3684 | (bucket_blkno(target) - src_blkno); |
3685 | ||
3686 | ocfs2_xattr_bucket_relse(first); | |
3687 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3688 | |
b5c03e74 | 3689 | /* |
c58b6032 | 3690 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3691 | * journal from ocfs2_cp_xattr_bucket(). |
3692 | */ | |
41cb8148 | 3693 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3694 | if (ret) { |
3695 | mlog_errno(ret); | |
3696 | goto out; | |
3697 | } | |
41cb8148 JB |
3698 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3699 | if (ret) | |
b5c03e74 | 3700 | mlog_errno(ret); |
01225596 | 3701 | |
01225596 TM |
3702 | } |
3703 | ||
01225596 | 3704 | out: |
01225596 TM |
3705 | return ret; |
3706 | } | |
3707 | ||
01225596 | 3708 | /* |
80bcaf34 TM |
3709 | * Find the suitable pos when we divide a bucket into 2. |
3710 | * We have to make sure the xattrs with the same hash value exist | |
3711 | * in the same bucket. | |
3712 | * | |
3713 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3714 | * place where the hash value changes. Try to find the most even split. | |
3715 | * The most common case is that all entries have different hash values, | |
3716 | * and the first check we make will find a place to split. | |
3717 | */ | |
3718 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3719 | { | |
3720 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3721 | int count = le16_to_cpu(xh->xh_count); | |
3722 | int delta, middle = count / 2; | |
3723 | ||
3724 | /* | |
3725 | * We start at the middle. Each step gets farther away in both | |
3726 | * directions. We therefore hit the change in hash value | |
3727 | * nearest to the middle. Note that this loop does not execute for | |
3728 | * count < 2. | |
3729 | */ | |
3730 | for (delta = 0; delta < middle; delta++) { | |
3731 | /* Let's check delta earlier than middle */ | |
3732 | if (cmp_xe(&entries[middle - delta - 1], | |
3733 | &entries[middle - delta])) | |
3734 | return middle - delta; | |
3735 | ||
3736 | /* For even counts, don't walk off the end */ | |
3737 | if ((middle + delta + 1) == count) | |
3738 | continue; | |
3739 | ||
3740 | /* Now try delta past middle */ | |
3741 | if (cmp_xe(&entries[middle + delta], | |
3742 | &entries[middle + delta + 1])) | |
3743 | return middle + delta + 1; | |
3744 | } | |
3745 | ||
3746 | /* Every entry had the same hash */ | |
3747 | return count; | |
3748 | } | |
3749 | ||
3750 | /* | |
3751 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3752 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3753 | * |
3754 | * Normally half of the xattrs will be moved. But we have to make | |
3755 | * sure that the xattrs with the same hash value are stored in the | |
3756 | * same bucket. If all the xattrs in this bucket have the same hash | |
3757 | * value, the new bucket will be initialized as an empty one and the | |
3758 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 3759 | */ |
80bcaf34 TM |
3760 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
3761 | handle_t *handle, | |
3762 | u64 blk, | |
3763 | u64 new_blk, | |
3764 | u32 *first_hash, | |
3765 | int new_bucket_head) | |
01225596 TM |
3766 | { |
3767 | int ret, i; | |
80bcaf34 | 3768 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 3769 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3770 | struct ocfs2_xattr_header *xh; |
3771 | struct ocfs2_xattr_entry *xe; | |
3772 | int blocksize = inode->i_sb->s_blocksize; | |
3773 | ||
80bcaf34 | 3774 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 3775 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 3776 | |
ba937127 JB |
3777 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3778 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3779 | if (!s_bucket || !t_bucket) { | |
3780 | ret = -ENOMEM; | |
3781 | mlog_errno(ret); | |
3782 | goto out; | |
3783 | } | |
01225596 | 3784 | |
ba937127 | 3785 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
3786 | if (ret) { |
3787 | mlog_errno(ret); | |
3788 | goto out; | |
3789 | } | |
3790 | ||
ba937127 | 3791 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 3792 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3793 | if (ret) { |
3794 | mlog_errno(ret); | |
3795 | goto out; | |
3796 | } | |
3797 | ||
784b816a JB |
3798 | /* |
3799 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
3800 | * there's no need to read it. | |
3801 | */ | |
ba937127 | 3802 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
3803 | if (ret) { |
3804 | mlog_errno(ret); | |
3805 | goto out; | |
3806 | } | |
3807 | ||
2b656c1d JB |
3808 | /* |
3809 | * Hey, if we're overwriting t_bucket, what difference does | |
3810 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
3811 | * same part of ocfs2_cp_xattr_bucket(). | |
3812 | */ | |
ba937127 | 3813 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3814 | new_bucket_head ? |
3815 | OCFS2_JOURNAL_ACCESS_CREATE : | |
3816 | OCFS2_JOURNAL_ACCESS_WRITE); | |
3817 | if (ret) { | |
3818 | mlog_errno(ret); | |
3819 | goto out; | |
01225596 TM |
3820 | } |
3821 | ||
ba937127 | 3822 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
3823 | count = le16_to_cpu(xh->xh_count); |
3824 | start = ocfs2_xattr_find_divide_pos(xh); | |
3825 | ||
3826 | if (start == count) { | |
3827 | xe = &xh->xh_entries[start-1]; | |
3828 | ||
3829 | /* | |
3830 | * initialized a new empty bucket here. | |
3831 | * The hash value is set as one larger than | |
3832 | * that of the last entry in the previous bucket. | |
3833 | */ | |
ba937127 JB |
3834 | for (i = 0; i < t_bucket->bu_blocks; i++) |
3835 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 3836 | |
ba937127 | 3837 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
3838 | xh->xh_free_start = cpu_to_le16(blocksize); |
3839 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
3840 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
3841 | ||
3842 | goto set_num_buckets; | |
3843 | } | |
3844 | ||
01225596 | 3845 | /* copy the whole bucket to the new first. */ |
ba937127 | 3846 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
3847 | |
3848 | /* update the new bucket. */ | |
ba937127 | 3849 | xh = bucket_xh(t_bucket); |
01225596 TM |
3850 | |
3851 | /* | |
3852 | * Calculate the total name/value len and xh_free_start for | |
3853 | * the old bucket first. | |
3854 | */ | |
3855 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
3856 | name_value_len = 0; | |
3857 | for (i = 0; i < start; i++) { | |
3858 | xe = &xh->xh_entries[i]; | |
3859 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3860 | if (ocfs2_xattr_is_local(xe)) | |
3861 | xe_len += | |
3862 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3863 | else | |
3864 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3865 | name_value_len += xe_len; | |
3866 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
3867 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3868 | } | |
3869 | ||
3870 | /* | |
3871 | * Now begin the modification to the new bucket. | |
3872 | * | |
3873 | * In the new bucket, We just move the xattr entry to the beginning | |
3874 | * and don't touch the name/value. So there will be some holes in the | |
3875 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
3876 | * called. | |
3877 | */ | |
3878 | xe = &xh->xh_entries[start]; | |
3879 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
3880 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
3881 | (int)((char *)xe - (char *)xh), |
3882 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
3883 | memmove((char *)xh->xh_entries, (char *)xe, len); |
3884 | xe = &xh->xh_entries[count - start]; | |
3885 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
3886 | memset((char *)xe, 0, len); | |
3887 | ||
3888 | le16_add_cpu(&xh->xh_count, -start); | |
3889 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
3890 | ||
3891 | /* Calculate xh_free_start for the new bucket. */ | |
3892 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
3893 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3894 | xe = &xh->xh_entries[i]; | |
3895 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3896 | if (ocfs2_xattr_is_local(xe)) | |
3897 | xe_len += | |
3898 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
3899 | else | |
3900 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
3901 | if (le16_to_cpu(xe->xe_name_offset) < | |
3902 | le16_to_cpu(xh->xh_free_start)) | |
3903 | xh->xh_free_start = xe->xe_name_offset; | |
3904 | } | |
3905 | ||
80bcaf34 | 3906 | set_num_buckets: |
01225596 TM |
3907 | /* set xh->xh_num_buckets for the new xh. */ |
3908 | if (new_bucket_head) | |
3909 | xh->xh_num_buckets = cpu_to_le16(1); | |
3910 | else | |
3911 | xh->xh_num_buckets = 0; | |
3912 | ||
ba937127 | 3913 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
3914 | |
3915 | /* store the first_hash of the new bucket. */ | |
3916 | if (first_hash) | |
3917 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
3918 | ||
3919 | /* | |
80bcaf34 TM |
3920 | * Now only update the 1st block of the old bucket. If we |
3921 | * just added a new empty bucket, there is no need to modify | |
3922 | * it. | |
01225596 | 3923 | */ |
80bcaf34 TM |
3924 | if (start == count) |
3925 | goto out; | |
3926 | ||
ba937127 | 3927 | xh = bucket_xh(s_bucket); |
01225596 TM |
3928 | memset(&xh->xh_entries[start], 0, |
3929 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
3930 | xh->xh_count = cpu_to_le16(start); | |
3931 | xh->xh_free_start = cpu_to_le16(name_offset); | |
3932 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
3933 | ||
ba937127 | 3934 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
3935 | |
3936 | out: | |
ba937127 JB |
3937 | ocfs2_xattr_bucket_free(s_bucket); |
3938 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
3939 | |
3940 | return ret; | |
3941 | } | |
3942 | ||
3943 | /* | |
3944 | * Copy xattr from one bucket to another bucket. | |
3945 | * | |
3946 | * The caller must make sure that the journal transaction | |
3947 | * has enough space for journaling. | |
3948 | */ | |
3949 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
3950 | handle_t *handle, | |
3951 | u64 s_blkno, | |
3952 | u64 t_blkno, | |
3953 | int t_is_new) | |
3954 | { | |
4980c6da | 3955 | int ret; |
ba937127 | 3956 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
3957 | |
3958 | BUG_ON(s_blkno == t_blkno); | |
3959 | ||
3960 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
3961 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
3962 | t_is_new); | |
01225596 | 3963 | |
ba937127 JB |
3964 | s_bucket = ocfs2_xattr_bucket_new(inode); |
3965 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
3966 | if (!s_bucket || !t_bucket) { | |
3967 | ret = -ENOMEM; | |
3968 | mlog_errno(ret); | |
3969 | goto out; | |
3970 | } | |
92de109a | 3971 | |
ba937127 | 3972 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
3973 | if (ret) |
3974 | goto out; | |
3975 | ||
784b816a JB |
3976 | /* |
3977 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
3978 | * there's no need to read it. | |
3979 | */ | |
ba937127 | 3980 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
3981 | if (ret) |
3982 | goto out; | |
3983 | ||
2b656c1d JB |
3984 | /* |
3985 | * Hey, if we're overwriting t_bucket, what difference does | |
3986 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
3987 | * cluster to fill, we came here from |
3988 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
3989 | * ACCESS_CREATE is required. But we also might have moved data | |
3990 | * out of t_bucket before extending back into it. | |
3991 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
3992 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
3993 | * and copied out the end of the old extent. Then it re-extends |
3994 | * the old extent back to create space for new xattrs. That's | |
3995 | * how we get here, and the bucket isn't really new. | |
3996 | */ | |
ba937127 | 3997 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
3998 | t_is_new ? |
3999 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4000 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4001 | if (ret) | |
4002 | goto out; | |
01225596 | 4003 | |
ba937127 JB |
4004 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4005 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4006 | |
4007 | out: | |
ba937127 JB |
4008 | ocfs2_xattr_bucket_free(t_bucket); |
4009 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4010 | |
4011 | return ret; | |
4012 | } | |
4013 | ||
4014 | /* | |
874d65af JB |
4015 | * src_blk points to the start of an existing extent. last_blk points to |
4016 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4017 | * extent. We copy the buckets from the cluster at last_blk to the new |
4018 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4019 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4020 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4021 | * by the same amount. | |
01225596 | 4022 | */ |
54ecb6b6 JB |
4023 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4024 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4025 | unsigned int start_bucket, | |
4026 | u32 *first_hash) | |
01225596 TM |
4027 | { |
4028 | int i, ret, credits; | |
4029 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4030 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4031 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4032 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4033 | |
874d65af JB |
4034 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4035 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4036 | |
54ecb6b6 JB |
4037 | BUG_ON(start_bucket >= num_buckets); |
4038 | if (start_bucket) { | |
4039 | num_buckets -= start_bucket; | |
4040 | last_blk += (start_bucket * blks_per_bucket); | |
4041 | } | |
4042 | ||
15d60929 JB |
4043 | /* The first bucket of the original extent */ |
4044 | old_first = ocfs2_xattr_bucket_new(inode); | |
4045 | /* The first bucket of the new extent */ | |
4046 | new_first = ocfs2_xattr_bucket_new(inode); | |
4047 | if (!old_first || !new_first) { | |
4048 | ret = -ENOMEM; | |
4049 | mlog_errno(ret); | |
4050 | goto out; | |
4051 | } | |
4052 | ||
874d65af | 4053 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4054 | if (ret) { |
4055 | mlog_errno(ret); | |
4056 | goto out; | |
4057 | } | |
4058 | ||
01225596 | 4059 | /* |
54ecb6b6 JB |
4060 | * We need to update the first bucket of the old extent and all |
4061 | * the buckets going to the new extent. | |
01225596 | 4062 | */ |
54ecb6b6 JB |
4063 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4064 | handle->h_buffer_credits; | |
01225596 TM |
4065 | ret = ocfs2_extend_trans(handle, credits); |
4066 | if (ret) { | |
4067 | mlog_errno(ret); | |
4068 | goto out; | |
4069 | } | |
4070 | ||
15d60929 JB |
4071 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4072 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4073 | if (ret) { |
4074 | mlog_errno(ret); | |
4075 | goto out; | |
4076 | } | |
4077 | ||
4078 | for (i = 0; i < num_buckets; i++) { | |
4079 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4080 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4081 | to_blk + (i * blks_per_bucket), |
4082 | 1); | |
01225596 TM |
4083 | if (ret) { |
4084 | mlog_errno(ret); | |
4085 | goto out; | |
4086 | } | |
01225596 TM |
4087 | } |
4088 | ||
15d60929 JB |
4089 | /* |
4090 | * Get the new bucket ready before we dirty anything | |
4091 | * (This actually shouldn't fail, because we already dirtied | |
4092 | * it once in ocfs2_cp_xattr_bucket()). | |
4093 | */ | |
4094 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4095 | if (ret) { | |
01225596 TM |
4096 | mlog_errno(ret); |
4097 | goto out; | |
4098 | } | |
15d60929 JB |
4099 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4100 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4101 | if (ret) { |
4102 | mlog_errno(ret); | |
4103 | goto out; | |
4104 | } | |
4105 | ||
15d60929 JB |
4106 | /* Now update the headers */ |
4107 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4108 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4109 | |
15d60929 JB |
4110 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4111 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4112 | |
4113 | if (first_hash) | |
15d60929 JB |
4114 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4115 | ||
01225596 | 4116 | out: |
15d60929 JB |
4117 | ocfs2_xattr_bucket_free(new_first); |
4118 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4119 | return ret; |
4120 | } | |
4121 | ||
4122 | /* | |
80bcaf34 | 4123 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4124 | * This function should only be called when bucket size == cluster size. |
4125 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4126 | */ | |
80bcaf34 TM |
4127 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4128 | handle_t *handle, | |
4129 | u64 prev_blk, | |
4130 | u64 new_blk, | |
4131 | u32 *first_hash) | |
01225596 TM |
4132 | { |
4133 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4134 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4135 | |
4136 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4137 | ||
4138 | ret = ocfs2_extend_trans(handle, credits); | |
4139 | if (ret) { | |
4140 | mlog_errno(ret); | |
4141 | return ret; | |
4142 | } | |
4143 | ||
4144 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4145 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4146 | new_blk, first_hash, 1); | |
01225596 TM |
4147 | } |
4148 | ||
4149 | /* | |
4150 | * Move some xattrs from the old cluster to the new one since they are not | |
4151 | * contiguous in ocfs2 xattr tree. | |
4152 | * | |
4153 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4154 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4155 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4156 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4157 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4158 | * to extend the insert bucket. | |
4159 | * | |
4160 | * The problem is how much xattr should we move to the new one and when should | |
4161 | * we update first_bh and header_bh? | |
4162 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4163 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4164 | * update the first_bh and header_bh if the insert bucket has been moved | |
4165 | * to the new cluster. | |
4166 | * 2. If cluster_size == bucket_size: | |
4167 | * a) If the previous extent rec has more than one cluster and the insert | |
4168 | * place isn't in the last cluster, copy the entire last cluster to the | |
4169 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4170 | * since they will not be moved into the new cluster. | |
4171 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4172 | * the new one. And we set the extend flag to zero if the insert place is | |
4173 | * moved into the new allocated cluster since no extend is needed. | |
4174 | */ | |
4175 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4176 | handle_t *handle, | |
012ee910 JB |
4177 | struct ocfs2_xattr_bucket *first, |
4178 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4179 | u64 new_blk, |
01225596 TM |
4180 | u32 prev_clusters, |
4181 | u32 *v_start, | |
4182 | int *extend) | |
4183 | { | |
92cf3adf | 4184 | int ret; |
01225596 TM |
4185 | |
4186 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4187 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4188 | (unsigned long long)new_blk); |
01225596 | 4189 | |
41cb8148 | 4190 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4191 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4192 | handle, | |
41cb8148 | 4193 | first, target, |
01225596 | 4194 | new_blk, |
01225596 TM |
4195 | prev_clusters, |
4196 | v_start); | |
012ee910 | 4197 | if (ret) |
41cb8148 | 4198 | mlog_errno(ret); |
41cb8148 | 4199 | } else { |
92cf3adf JB |
4200 | /* The start of the last cluster in the first extent */ |
4201 | u64 last_blk = bucket_blkno(first) + | |
4202 | ((prev_clusters - 1) * | |
4203 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4204 | |
012ee910 | 4205 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4206 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4207 | bucket_blkno(first), |
54ecb6b6 | 4208 | last_blk, new_blk, 0, |
01225596 | 4209 | v_start); |
012ee910 JB |
4210 | if (ret) |
4211 | mlog_errno(ret); | |
4212 | } else { | |
80bcaf34 TM |
4213 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4214 | last_blk, new_blk, | |
4215 | v_start); | |
012ee910 JB |
4216 | if (ret) |
4217 | mlog_errno(ret); | |
01225596 | 4218 | |
92cf3adf | 4219 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4220 | *extend = 0; |
4221 | } | |
4222 | } | |
4223 | ||
4224 | return ret; | |
4225 | } | |
4226 | ||
4227 | /* | |
4228 | * Add a new cluster for xattr storage. | |
4229 | * | |
4230 | * If the new cluster is contiguous with the previous one, it will be | |
4231 | * appended to the same extent record, and num_clusters will be updated. | |
4232 | * If not, we will insert a new extent for it and move some xattrs in | |
4233 | * the last cluster into the new allocated one. | |
4234 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4235 | * lose the benefits of hashing because we'll have to search large leaves. | |
4236 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4237 | * if it's bigger). | |
4238 | * | |
4239 | * first_bh is the first block of the previous extent rec and header_bh | |
4240 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4241 | * when the header_bh is moved into the new cluster. | |
4242 | */ | |
4243 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4244 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4245 | struct ocfs2_xattr_bucket *first, |
4246 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4247 | u32 *num_clusters, |
4248 | u32 prev_cpos, | |
78f30c31 TM |
4249 | int *extend, |
4250 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4251 | { |
85db90e7 | 4252 | int ret; |
01225596 TM |
4253 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4254 | u32 prev_clusters = *num_clusters; | |
4255 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4256 | u64 block; | |
85db90e7 | 4257 | handle_t *handle = ctxt->handle; |
01225596 | 4258 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4259 | struct ocfs2_extent_tree et; |
01225596 TM |
4260 | |
4261 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4262 | "previous xattr blkno = %llu\n", | |
4263 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4264 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4265 | |
8d6220d6 | 4266 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
f99b9b7c | 4267 | |
84008972 JB |
4268 | ret = ocfs2_journal_access_xb(handle, inode, root_bh, |
4269 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4270 | if (ret < 0) { |
4271 | mlog_errno(ret); | |
4272 | goto leave; | |
4273 | } | |
4274 | ||
78f30c31 | 4275 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4276 | clusters_to_add, &bit_off, &num_bits); |
4277 | if (ret < 0) { | |
4278 | if (ret != -ENOSPC) | |
4279 | mlog_errno(ret); | |
4280 | goto leave; | |
4281 | } | |
4282 | ||
4283 | BUG_ON(num_bits > clusters_to_add); | |
4284 | ||
4285 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4286 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4287 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4288 | ||
ed29c0ca | 4289 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4290 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4291 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4292 | /* | |
4293 | * If this cluster is contiguous with the old one and | |
4294 | * adding this new cluster, we don't surpass the limit of | |
4295 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4296 | * initialized and used like other buckets in the previous | |
4297 | * cluster. | |
4298 | * So add it as a contiguous one. The caller will handle | |
4299 | * its init process. | |
4300 | */ | |
4301 | v_start = prev_cpos + prev_clusters; | |
4302 | *num_clusters = prev_clusters + num_bits; | |
4303 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4304 | num_bits); | |
4305 | } else { | |
4306 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4307 | handle, | |
012ee910 JB |
4308 | first, |
4309 | target, | |
01225596 | 4310 | block, |
01225596 TM |
4311 | prev_clusters, |
4312 | &v_start, | |
4313 | extend); | |
4314 | if (ret) { | |
4315 | mlog_errno(ret); | |
4316 | goto leave; | |
4317 | } | |
4318 | } | |
4319 | ||
4320 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4321 | num_bits, (unsigned long long)block, v_start); |
f99b9b7c | 4322 | ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
78f30c31 | 4323 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4324 | if (ret < 0) { |
4325 | mlog_errno(ret); | |
4326 | goto leave; | |
4327 | } | |
4328 | ||
4329 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4330 | if (ret < 0) |
01225596 | 4331 | mlog_errno(ret); |
01225596 TM |
4332 | |
4333 | leave: | |
01225596 TM |
4334 | return ret; |
4335 | } | |
4336 | ||
4337 | /* | |
92de109a JB |
4338 | * We are given an extent. 'first' is the bucket at the very front of |
4339 | * the extent. The extent has space for an additional bucket past | |
4340 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4341 | * of the target bucket. We wish to shift every bucket past the target | |
4342 | * down one, filling in that additional space. When we get back to the | |
4343 | * target, we split the target between itself and the now-empty bucket | |
4344 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4345 | */ |
4346 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4347 | handle_t *handle, |
92de109a JB |
4348 | struct ocfs2_xattr_bucket *first, |
4349 | u64 target_blk, | |
01225596 TM |
4350 | u32 num_clusters) |
4351 | { | |
4352 | int ret, credits; | |
4353 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4354 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4355 | u64 end_blk; |
4356 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4357 | |
4358 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4359 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4360 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4361 | |
92de109a JB |
4362 | /* The extent must have room for an additional bucket */ |
4363 | BUG_ON(new_bucket >= | |
4364 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4365 | |
92de109a JB |
4366 | /* end_blk points to the last existing bucket */ |
4367 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4368 | |
4369 | /* | |
92de109a JB |
4370 | * end_blk is the start of the last existing bucket. |
4371 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4372 | * every bucket after it up to, but not including, the last | |
4373 | * existing bucket. Then we add the last existing bucket, the | |
4374 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4375 | */ |
92de109a | 4376 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4377 | handle->h_buffer_credits; |
4378 | ret = ocfs2_extend_trans(handle, credits); | |
4379 | if (ret) { | |
01225596 TM |
4380 | mlog_errno(ret); |
4381 | goto out; | |
4382 | } | |
4383 | ||
92de109a JB |
4384 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4385 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4386 | if (ret) { |
4387 | mlog_errno(ret); | |
85db90e7 | 4388 | goto out; |
01225596 TM |
4389 | } |
4390 | ||
92de109a | 4391 | while (end_blk != target_blk) { |
01225596 TM |
4392 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4393 | end_blk + blk_per_bucket, 0); | |
4394 | if (ret) | |
85db90e7 | 4395 | goto out; |
01225596 TM |
4396 | end_blk -= blk_per_bucket; |
4397 | } | |
4398 | ||
92de109a JB |
4399 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4400 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4401 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4402 | |
92de109a JB |
4403 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4404 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4405 | |
01225596 TM |
4406 | out: |
4407 | return ret; | |
4408 | } | |
4409 | ||
4410 | /* | |
91f2033f JB |
4411 | * Add new xattr bucket in an extent record and adjust the buckets |
4412 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4413 | * bucket we want to insert into. | |
01225596 | 4414 | * |
91f2033f JB |
4415 | * In the easy case, we will move all the buckets after target down by |
4416 | * one. Half of target's xattrs will be moved to the next bucket. | |
4417 | * | |
4418 | * If current cluster is full, we'll allocate a new one. This may not | |
4419 | * be contiguous. The underlying calls will make sure that there is | |
4420 | * space for the insert, shifting buckets around if necessary. | |
4421 | * 'target' may be moved by those calls. | |
01225596 TM |
4422 | */ |
4423 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4424 | struct buffer_head *xb_bh, | |
91f2033f | 4425 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4426 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4427 | { |
01225596 TM |
4428 | struct ocfs2_xattr_block *xb = |
4429 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4430 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4431 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4432 | u32 name_hash = |
4433 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4434 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4435 | int ret, num_buckets, extend = 1; |
4436 | u64 p_blkno; | |
4437 | u32 e_cpos, num_clusters; | |
92de109a | 4438 | /* The bucket at the front of the extent */ |
91f2033f | 4439 | struct ocfs2_xattr_bucket *first; |
01225596 | 4440 | |
91f2033f JB |
4441 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4442 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4443 | |
ed29c0ca | 4444 | /* The first bucket of the original extent */ |
92de109a | 4445 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4446 | if (!first) { |
92de109a JB |
4447 | ret = -ENOMEM; |
4448 | mlog_errno(ret); | |
4449 | goto out; | |
4450 | } | |
4451 | ||
01225596 TM |
4452 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4453 | &num_clusters, el); | |
4454 | if (ret) { | |
4455 | mlog_errno(ret); | |
4456 | goto out; | |
4457 | } | |
4458 | ||
ed29c0ca | 4459 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4460 | if (ret) { |
4461 | mlog_errno(ret); | |
4462 | goto out; | |
4463 | } | |
4464 | ||
ed29c0ca JB |
4465 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4466 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4467 | /* | |
4468 | * This can move first+target if the target bucket moves | |
4469 | * to the new extent. | |
4470 | */ | |
01225596 TM |
4471 | ret = ocfs2_add_new_xattr_cluster(inode, |
4472 | xb_bh, | |
ed29c0ca JB |
4473 | first, |
4474 | target, | |
01225596 TM |
4475 | &num_clusters, |
4476 | e_cpos, | |
78f30c31 TM |
4477 | &extend, |
4478 | ctxt); | |
01225596 TM |
4479 | if (ret) { |
4480 | mlog_errno(ret); | |
4481 | goto out; | |
4482 | } | |
4483 | } | |
4484 | ||
92de109a | 4485 | if (extend) { |
01225596 | 4486 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4487 | ctxt->handle, |
ed29c0ca JB |
4488 | first, |
4489 | bucket_blkno(target), | |
01225596 | 4490 | num_clusters); |
92de109a JB |
4491 | if (ret) |
4492 | mlog_errno(ret); | |
4493 | } | |
4494 | ||
01225596 | 4495 | out: |
92de109a | 4496 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4497 | |
01225596 TM |
4498 | return ret; |
4499 | } | |
4500 | ||
4501 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4502 | struct ocfs2_xattr_bucket *bucket, | |
4503 | int offs) | |
4504 | { | |
4505 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4506 | ||
4507 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4508 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4509 | } |
4510 | ||
4511 | /* | |
4512 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4513 | * |
4514 | * Note: "local" indicates the real data's locality. So we can't | |
4515 | * just its bucket locality by its length. | |
4516 | */ | |
4517 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4518 | struct ocfs2_xattr_info *xi, | |
4519 | struct ocfs2_xattr_search *xs, | |
4520 | u32 name_hash, | |
5a095611 | 4521 | int local) |
01225596 TM |
4522 | { |
4523 | struct ocfs2_xattr_entry *last, *xe; | |
4524 | int name_len = strlen(xi->name); | |
4525 | struct ocfs2_xattr_header *xh = xs->header; | |
4526 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4527 | size_t blocksize = inode->i_sb->s_blocksize; | |
4528 | char *val; | |
4529 | size_t offs, size, new_size; | |
4530 | ||
4531 | last = &xh->xh_entries[count]; | |
4532 | if (!xs->not_found) { | |
4533 | xe = xs->here; | |
4534 | offs = le16_to_cpu(xe->xe_name_offset); | |
4535 | if (ocfs2_xattr_is_local(xe)) | |
4536 | size = OCFS2_XATTR_SIZE(name_len) + | |
4537 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4538 | else | |
4539 | size = OCFS2_XATTR_SIZE(name_len) + | |
4540 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4541 | ||
4542 | /* | |
4543 | * If the new value will be stored outside, xi->value has been | |
4544 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4545 | * goes with xi->value_len, so we can set new_size safely here. | |
4546 | * See ocfs2_xattr_set_in_bucket. | |
4547 | */ | |
4548 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4549 | OCFS2_XATTR_SIZE(xi->value_len); | |
4550 | ||
4551 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4552 | if (xi->value) { | |
4553 | if (new_size > size) | |
4554 | goto set_new_name_value; | |
4555 | ||
4556 | /* Now replace the old value with new one. */ | |
4557 | if (local) | |
4558 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4559 | else | |
4560 | xe->xe_value_size = 0; | |
4561 | ||
4562 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4563 | xs->bucket, offs); |
01225596 TM |
4564 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4565 | size - OCFS2_XATTR_SIZE(name_len)); | |
4566 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4567 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4568 | xi->value, xi->value_len); | |
4569 | ||
4570 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4571 | ocfs2_xattr_set_local(xe, local); | |
4572 | return; | |
4573 | } else { | |
5a095611 TM |
4574 | /* |
4575 | * Remove the old entry if there is more than one. | |
4576 | * We don't remove the last entry so that we can | |
4577 | * use it to indicate the hash value of the empty | |
4578 | * bucket. | |
4579 | */ | |
01225596 | 4580 | last -= 1; |
01225596 | 4581 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4582 | if (xh->xh_count) { |
4583 | memmove(xe, xe + 1, | |
4584 | (void *)last - (void *)xe); | |
4585 | memset(last, 0, | |
4586 | sizeof(struct ocfs2_xattr_entry)); | |
4587 | } else | |
4588 | xh->xh_free_start = | |
4589 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4590 | ||
01225596 TM |
4591 | return; |
4592 | } | |
4593 | } else { | |
4594 | /* find a new entry for insert. */ | |
4595 | int low = 0, high = count - 1, tmp; | |
4596 | struct ocfs2_xattr_entry *tmp_xe; | |
4597 | ||
5a095611 | 4598 | while (low <= high && count) { |
01225596 TM |
4599 | tmp = (low + high) / 2; |
4600 | tmp_xe = &xh->xh_entries[tmp]; | |
4601 | ||
4602 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4603 | low = tmp + 1; | |
4604 | else if (name_hash < | |
4605 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4606 | high = tmp - 1; | |
06b240d8 TM |
4607 | else { |
4608 | low = tmp; | |
01225596 | 4609 | break; |
06b240d8 | 4610 | } |
01225596 TM |
4611 | } |
4612 | ||
4613 | xe = &xh->xh_entries[low]; | |
4614 | if (low != count) | |
4615 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4616 | ||
4617 | le16_add_cpu(&xh->xh_count, 1); | |
4618 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4619 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4620 | xe->xe_name_len = name_len; | |
4621 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4622 | } | |
4623 | ||
4624 | set_new_name_value: | |
4625 | /* Insert the new name+value. */ | |
4626 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4627 | ||
4628 | /* | |
4629 | * We must make sure that the name/value pair | |
4630 | * exists in the same block. | |
4631 | */ | |
4632 | offs = le16_to_cpu(xh->xh_free_start); | |
4633 | start = offs - size; | |
4634 | ||
4635 | if (start >> inode->i_sb->s_blocksize_bits != | |
4636 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4637 | offs = offs - offs % blocksize; | |
4638 | xh->xh_free_start = cpu_to_le16(offs); | |
4639 | } | |
4640 | ||
ba937127 | 4641 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4642 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4643 | ||
4644 | memset(val, 0, size); | |
4645 | memcpy(val, xi->name, name_len); | |
4646 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4647 | ||
4648 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4649 | ocfs2_xattr_set_local(xe, local); | |
4650 | xs->here = xe; | |
4651 | le16_add_cpu(&xh->xh_free_start, -size); | |
4652 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4653 | ||
4654 | return; | |
4655 | } | |
4656 | ||
01225596 TM |
4657 | /* |
4658 | * Set the xattr entry in the specified bucket. | |
4659 | * The bucket is indicated by xs->bucket and it should have the enough | |
4660 | * space for the xattr insertion. | |
4661 | */ | |
4662 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4663 | handle_t *handle, |
01225596 TM |
4664 | struct ocfs2_xattr_info *xi, |
4665 | struct ocfs2_xattr_search *xs, | |
4666 | u32 name_hash, | |
5a095611 | 4667 | int local) |
01225596 | 4668 | { |
1224be02 | 4669 | int ret; |
02dbf38d | 4670 | u64 blkno; |
01225596 | 4671 | |
ff1ec20e MF |
4672 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4673 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4674 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4675 | |
ba937127 | 4676 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4677 | blkno = bucket_blkno(xs->bucket); |
4678 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4679 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4680 | if (ret) { |
4681 | mlog_errno(ret); | |
4682 | goto out; | |
4683 | } | |
4684 | } | |
4685 | ||
ba937127 | 4686 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4687 | OCFS2_JOURNAL_ACCESS_WRITE); |
4688 | if (ret < 0) { | |
4689 | mlog_errno(ret); | |
4690 | goto out; | |
01225596 TM |
4691 | } |
4692 | ||
5a095611 | 4693 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4694 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4695 | |
01225596 | 4696 | out: |
01225596 TM |
4697 | return ret; |
4698 | } | |
4699 | ||
01225596 TM |
4700 | /* |
4701 | * Truncate the specified xe_off entry in xattr bucket. | |
4702 | * bucket is indicated by header_bh and len is the new length. | |
4703 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4704 | * | |
4705 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4706 | */ | |
4707 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4708 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4709 | int xe_off, |
78f30c31 TM |
4710 | int len, |
4711 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4712 | { |
4713 | int ret, offset; | |
4714 | u64 value_blk; | |
01225596 | 4715 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4716 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4717 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4718 | struct ocfs2_xattr_value_buf vb = { |
4719 | .vb_access = ocfs2_journal_access, | |
4720 | }; | |
01225596 TM |
4721 | |
4722 | xe = &xh->xh_entries[xe_off]; | |
4723 | ||
4724 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4725 | ||
4726 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4727 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4728 | ||
4729 | value_blk = offset / blocksize; | |
4730 | ||
4731 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4732 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4733 | |
b3e5d379 JB |
4734 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4735 | BUG_ON(!vb.vb_bh); | |
01225596 | 4736 | |
b3e5d379 JB |
4737 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4738 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4739 | |
548b0f22 JB |
4740 | /* |
4741 | * From here on out we have to dirty the bucket. The generic | |
4742 | * value calls only modify one of the bucket's bhs, but we need | |
4743 | * to send the bucket at once. So if they error, they *could* have | |
4744 | * modified something. We have to assume they did, and dirty | |
4745 | * the whole bucket. This leaves us in a consistent state. | |
4746 | */ | |
4747 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4748 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4749 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4750 | if (ret) { |
4751 | mlog_errno(ret); | |
554e7f9e TM |
4752 | goto out; |
4753 | } | |
4754 | ||
4755 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
4756 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4757 | if (ret) { | |
4758 | mlog_errno(ret); | |
4759 | goto out; | |
01225596 TM |
4760 | } |
4761 | ||
548b0f22 JB |
4762 | xe->xe_value_size = cpu_to_le64(len); |
4763 | ||
548b0f22 JB |
4764 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
4765 | ||
01225596 | 4766 | out: |
01225596 TM |
4767 | return ret; |
4768 | } | |
4769 | ||
4770 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
4771 | struct ocfs2_xattr_search *xs, |
4772 | int len, | |
4773 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4774 | { |
4775 | int ret, offset; | |
4776 | struct ocfs2_xattr_entry *xe = xs->here; | |
4777 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
4778 | ||
ba937127 | 4779 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
4780 | |
4781 | offset = xe - xh->xh_entries; | |
548b0f22 | 4782 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 4783 | offset, len, ctxt); |
01225596 TM |
4784 | if (ret) |
4785 | mlog_errno(ret); | |
4786 | ||
4787 | return ret; | |
4788 | } | |
4789 | ||
4790 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 4791 | handle_t *handle, |
01225596 TM |
4792 | struct ocfs2_xattr_search *xs, |
4793 | char *val, | |
4794 | int value_len) | |
4795 | { | |
712e53e4 | 4796 | int ret, offset, block_off; |
01225596 TM |
4797 | struct ocfs2_xattr_value_root *xv; |
4798 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
4799 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
4800 | void *base; | |
01225596 TM |
4801 | |
4802 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
4803 | ||
712e53e4 TM |
4804 | ret = ocfs2_xattr_bucket_get_name_value(inode, xh, |
4805 | xe - xh->xh_entries, | |
4806 | &block_off, | |
4807 | &offset); | |
4808 | if (ret) { | |
4809 | mlog_errno(ret); | |
4810 | goto out; | |
4811 | } | |
01225596 | 4812 | |
712e53e4 TM |
4813 | base = bucket_block(xs->bucket, block_off); |
4814 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
4815 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 4816 | |
712e53e4 TM |
4817 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
4818 | xv, val, value_len); | |
4819 | if (ret) | |
4820 | mlog_errno(ret); | |
4821 | out: | |
4822 | return ret; | |
01225596 TM |
4823 | } |
4824 | ||
01225596 TM |
4825 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
4826 | struct buffer_head *root_bh, | |
4827 | u64 blkno, | |
4828 | u32 cpos, | |
4829 | u32 len) | |
4830 | { | |
4831 | int ret; | |
4832 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4833 | struct inode *tl_inode = osb->osb_tl_inode; | |
4834 | handle_t *handle; | |
4835 | struct ocfs2_xattr_block *xb = | |
4836 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
4837 | struct ocfs2_alloc_context *meta_ac = NULL; |
4838 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
4839 | struct ocfs2_extent_tree et; |
4840 | ||
8d6220d6 | 4841 | ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
01225596 TM |
4842 | |
4843 | ocfs2_init_dealloc_ctxt(&dealloc); | |
4844 | ||
4845 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
4846 | cpos, len, (unsigned long long)blkno); | |
4847 | ||
4848 | ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); | |
4849 | ||
f99b9b7c | 4850 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
4851 | if (ret) { |
4852 | mlog_errno(ret); | |
4853 | return ret; | |
4854 | } | |
4855 | ||
4856 | mutex_lock(&tl_inode->i_mutex); | |
4857 | ||
4858 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
4859 | ret = __ocfs2_flush_truncate_log(osb); | |
4860 | if (ret < 0) { | |
4861 | mlog_errno(ret); | |
4862 | goto out; | |
4863 | } | |
4864 | } | |
4865 | ||
a90714c1 | 4866 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 4867 | if (IS_ERR(handle)) { |
01225596 TM |
4868 | ret = -ENOMEM; |
4869 | mlog_errno(ret); | |
4870 | goto out; | |
4871 | } | |
4872 | ||
84008972 JB |
4873 | ret = ocfs2_journal_access_xb(handle, inode, root_bh, |
4874 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4875 | if (ret) { |
4876 | mlog_errno(ret); | |
4877 | goto out_commit; | |
4878 | } | |
4879 | ||
f99b9b7c JB |
4880 | ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, |
4881 | &dealloc); | |
01225596 TM |
4882 | if (ret) { |
4883 | mlog_errno(ret); | |
4884 | goto out_commit; | |
4885 | } | |
4886 | ||
4887 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
4888 | ||
4889 | ret = ocfs2_journal_dirty(handle, root_bh); | |
4890 | if (ret) { | |
4891 | mlog_errno(ret); | |
4892 | goto out_commit; | |
4893 | } | |
4894 | ||
4895 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
4896 | if (ret) | |
4897 | mlog_errno(ret); | |
4898 | ||
4899 | out_commit: | |
4900 | ocfs2_commit_trans(osb, handle); | |
4901 | out: | |
4902 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
4903 | ||
4904 | mutex_unlock(&tl_inode->i_mutex); | |
4905 | ||
4906 | if (meta_ac) | |
4907 | ocfs2_free_alloc_context(meta_ac); | |
4908 | ||
4909 | ocfs2_run_deallocs(osb, &dealloc); | |
4910 | ||
4911 | return ret; | |
4912 | } | |
4913 | ||
01225596 | 4914 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 4915 | handle_t *handle, |
01225596 TM |
4916 | struct ocfs2_xattr_search *xs) |
4917 | { | |
ba937127 | 4918 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
4919 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
4920 | le16_to_cpu(xh->xh_count) - 1]; | |
4921 | int ret = 0; | |
4922 | ||
ba937127 | 4923 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 4924 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4925 | if (ret) { |
4926 | mlog_errno(ret); | |
85db90e7 | 4927 | return; |
01225596 TM |
4928 | } |
4929 | ||
4930 | /* Remove the old entry. */ | |
4931 | memmove(xs->here, xs->here + 1, | |
4932 | (void *)last - (void *)xs->here); | |
4933 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
4934 | le16_add_cpu(&xh->xh_count, -1); | |
4935 | ||
ba937127 | 4936 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
4937 | } |
4938 | ||
4939 | /* | |
4940 | * Set the xattr name/value in the bucket specified in xs. | |
4941 | * | |
4942 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
4943 | * we divide the whole process into 3 steps: | |
4944 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
4945 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
4946 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
4947 | * 4. If the clusters for the new outside value can't be allocated, we need | |
4948 | * to free the xattr we allocated in set. | |
4949 | */ | |
4950 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
4951 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
4952 | struct ocfs2_xattr_search *xs, |
4953 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4954 | { |
5a095611 | 4955 | int ret, local = 1; |
01225596 TM |
4956 | size_t value_len; |
4957 | char *val = (char *)xi->value; | |
4958 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
4959 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
4960 | strlen(xi->name)); | |
01225596 TM |
4961 | |
4962 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
4963 | /* | |
4964 | * We need to truncate the xattr storage first. | |
4965 | * | |
4966 | * If both the old and new value are stored to | |
4967 | * outside block, we only need to truncate | |
4968 | * the storage and then set the value outside. | |
4969 | * | |
4970 | * If the new value should be stored within block, | |
4971 | * we should free all the outside block first and | |
4972 | * the modification to the xattr block will be done | |
4973 | * by following steps. | |
4974 | */ | |
4975 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
4976 | value_len = xi->value_len; | |
4977 | else | |
4978 | value_len = 0; | |
4979 | ||
4980 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
4981 | value_len, |
4982 | ctxt); | |
01225596 TM |
4983 | if (ret) |
4984 | goto out; | |
4985 | ||
4986 | if (value_len) | |
4987 | goto set_value_outside; | |
4988 | } | |
4989 | ||
4990 | value_len = xi->value_len; | |
4991 | /* So we have to handle the inside block change now. */ | |
4992 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
4993 | /* | |
4994 | * If the new value will be stored outside of block, | |
4995 | * initalize a new empty value root and insert it first. | |
4996 | */ | |
4997 | local = 0; | |
4998 | xi->value = &def_xv; | |
4999 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
5000 | } | |
5001 | ||
85db90e7 TM |
5002 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5003 | name_hash, local); | |
01225596 TM |
5004 | if (ret) { |
5005 | mlog_errno(ret); | |
5006 | goto out; | |
5007 | } | |
5008 | ||
5a095611 TM |
5009 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5010 | goto out; | |
01225596 | 5011 | |
5a095611 TM |
5012 | /* allocate the space now for the outside block storage. */ |
5013 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5014 | value_len, ctxt); |
5a095611 TM |
5015 | if (ret) { |
5016 | mlog_errno(ret); | |
5017 | ||
5018 | if (xs->not_found) { | |
5019 | /* | |
5020 | * We can't allocate enough clusters for outside | |
5021 | * storage and we have allocated xattr already, | |
5022 | * so need to remove it. | |
5023 | */ | |
85db90e7 | 5024 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5025 | } |
01225596 TM |
5026 | goto out; |
5027 | } | |
5028 | ||
5029 | set_value_outside: | |
85db90e7 TM |
5030 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5031 | xs, val, value_len); | |
01225596 TM |
5032 | out: |
5033 | return ret; | |
5034 | } | |
5035 | ||
80bcaf34 TM |
5036 | /* |
5037 | * check whether the xattr bucket is filled up with the same hash value. | |
5038 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5039 | * If we want to insert a xattr with different hash value, go ahead | |
5040 | * and ocfs2_divide_xattr_bucket will handle this. | |
5041 | */ | |
01225596 | 5042 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5043 | struct ocfs2_xattr_bucket *bucket, |
5044 | const char *name) | |
01225596 | 5045 | { |
3e632946 | 5046 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5047 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5048 | ||
5049 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5050 | return 0; | |
01225596 TM |
5051 | |
5052 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5053 | xh->xh_entries[0].xe_name_hash) { | |
5054 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5055 | "hash = %u\n", | |
9c7759aa | 5056 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5057 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5058 | return -ENOSPC; | |
5059 | } | |
5060 | ||
5061 | return 0; | |
5062 | } | |
5063 | ||
5064 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5065 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5066 | struct ocfs2_xattr_search *xs, |
5067 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5068 | { |
5069 | struct ocfs2_xattr_header *xh; | |
5070 | struct ocfs2_xattr_entry *xe; | |
5071 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5072 | int free, max_free, need, old; |
01225596 TM |
5073 | size_t value_size = 0, name_len = strlen(xi->name); |
5074 | size_t blocksize = inode->i_sb->s_blocksize; | |
5075 | int ret, allocation = 0; | |
01225596 TM |
5076 | |
5077 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5078 | ||
5079 | try_again: | |
5080 | xh = xs->header; | |
5081 | count = le16_to_cpu(xh->xh_count); | |
5082 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5083 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5084 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5085 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5086 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5087 | |
5088 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5089 | "of %u which exceed block size\n", | |
ba937127 | 5090 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5091 | header_size); |
5092 | ||
5093 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5094 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5095 | else if (xi->value) | |
5096 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5097 | ||
5098 | if (xs->not_found) | |
5099 | need = sizeof(struct ocfs2_xattr_entry) + | |
5100 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5101 | else { | |
5102 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5103 | ||
5104 | /* | |
5105 | * We only replace the old value if the new length is smaller | |
5106 | * than the old one. Otherwise we will allocate new space in the | |
5107 | * bucket to store it. | |
5108 | */ | |
5109 | xe = xs->here; | |
5110 | if (ocfs2_xattr_is_local(xe)) | |
5111 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5112 | else | |
5113 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5114 | ||
5115 | if (old >= value_size) | |
5116 | need = 0; | |
5117 | } | |
5118 | ||
4442f518 | 5119 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5120 | /* |
5121 | * We need to make sure the new name/value pair | |
5122 | * can exist in the same block. | |
5123 | */ | |
5124 | if (xh_free_start % blocksize < need) | |
5125 | free -= xh_free_start % blocksize; | |
5126 | ||
5127 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5128 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5129 | " %u\n", xs->not_found, | |
ba937127 | 5130 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5131 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5132 | le16_to_cpu(xh->xh_name_value_len)); | |
5133 | ||
976331d8 TM |
5134 | if (free < need || |
5135 | (xs->not_found && | |
5136 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5137 | if (need <= max_free && |
5138 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5139 | /* | |
5140 | * We can create the space by defragment. Since only the | |
5141 | * name/value will be moved, the xe shouldn't be changed | |
5142 | * in xs. | |
5143 | */ | |
85db90e7 TM |
5144 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5145 | xs->bucket); | |
01225596 TM |
5146 | if (ret) { |
5147 | mlog_errno(ret); | |
5148 | goto out; | |
5149 | } | |
5150 | ||
5151 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5152 | free = xh_free_start - header_size |
5153 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5154 | if (xh_free_start % blocksize < need) |
5155 | free -= xh_free_start % blocksize; | |
5156 | ||
5157 | if (free >= need) | |
5158 | goto xattr_set; | |
5159 | ||
5160 | mlog(0, "Can't get enough space for xattr insert by " | |
5161 | "defragment. Need %u bytes, but we have %d, so " | |
5162 | "allocate new bucket for it.\n", need, free); | |
5163 | } | |
5164 | ||
5165 | /* | |
5166 | * We have to add new buckets or clusters and one | |
5167 | * allocation should leave us enough space for insert. | |
5168 | */ | |
5169 | BUG_ON(allocation); | |
5170 | ||
5171 | /* | |
5172 | * We do not allow for overlapping ranges between buckets. And | |
5173 | * the maximum number of collisions we will allow for then is | |
5174 | * one bucket's worth, so check it here whether we need to | |
5175 | * add a new bucket for the insert. | |
5176 | */ | |
80bcaf34 | 5177 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5178 | xs->bucket, |
80bcaf34 | 5179 | xi->name); |
01225596 TM |
5180 | if (ret) { |
5181 | mlog_errno(ret); | |
5182 | goto out; | |
5183 | } | |
5184 | ||
5185 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5186 | xs->xattr_bh, | |
91f2033f | 5187 | xs->bucket, |
78f30c31 | 5188 | ctxt); |
01225596 TM |
5189 | if (ret) { |
5190 | mlog_errno(ret); | |
5191 | goto out; | |
5192 | } | |
5193 | ||
91f2033f JB |
5194 | /* |
5195 | * ocfs2_add_new_xattr_bucket() will have updated | |
5196 | * xs->bucket if it moved, but it will not have updated | |
5197 | * any of the other search fields. Thus, we drop it and | |
5198 | * re-search. Everything should be cached, so it'll be | |
5199 | * quick. | |
5200 | */ | |
ba937127 | 5201 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5202 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5203 | xi->name_index, | |
5204 | xi->name, xs); | |
5205 | if (ret && ret != -ENODATA) | |
5206 | goto out; | |
5207 | xs->not_found = ret; | |
5208 | allocation = 1; | |
5209 | goto try_again; | |
5210 | } | |
5211 | ||
5212 | xattr_set: | |
78f30c31 | 5213 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5214 | out: |
5215 | mlog_exit(ret); | |
5216 | return ret; | |
5217 | } | |
a3944256 TM |
5218 | |
5219 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5220 | struct ocfs2_xattr_bucket *bucket, | |
5221 | void *para) | |
5222 | { | |
5223 | int ret = 0; | |
3e632946 | 5224 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5225 | u16 i; |
5226 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5227 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5228 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5229 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5230 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
5231 | ||
78f30c31 TM |
5232 | |
5233 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5234 | |
5235 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5236 | xe = &xh->xh_entries[i]; | |
5237 | if (ocfs2_xattr_is_local(xe)) | |
5238 | continue; | |
5239 | ||
88c3b062 TM |
5240 | ctxt.handle = ocfs2_start_trans(osb, credits); |
5241 | if (IS_ERR(ctxt.handle)) { | |
5242 | ret = PTR_ERR(ctxt.handle); | |
5243 | mlog_errno(ret); | |
5244 | break; | |
5245 | } | |
5246 | ||
548b0f22 | 5247 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5248 | i, 0, &ctxt); |
88c3b062 TM |
5249 | |
5250 | ocfs2_commit_trans(osb, ctxt.handle); | |
a3944256 TM |
5251 | if (ret) { |
5252 | mlog_errno(ret); | |
5253 | break; | |
5254 | } | |
5255 | } | |
5256 | ||
78f30c31 TM |
5257 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5258 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5259 | return ret; |
5260 | } | |
5261 | ||
5262 | static int ocfs2_delete_xattr_index_block(struct inode *inode, | |
5263 | struct buffer_head *xb_bh) | |
5264 | { | |
5265 | struct ocfs2_xattr_block *xb = | |
5266 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5267 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
5268 | int ret = 0; | |
5269 | u32 name_hash = UINT_MAX, e_cpos, num_clusters; | |
5270 | u64 p_blkno; | |
5271 | ||
5272 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
5273 | return 0; | |
5274 | ||
5275 | while (name_hash > 0) { | |
5276 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
5277 | &e_cpos, &num_clusters, el); | |
5278 | if (ret) { | |
5279 | mlog_errno(ret); | |
5280 | goto out; | |
5281 | } | |
5282 | ||
5283 | ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, | |
5284 | ocfs2_delete_xattr_in_bucket, | |
5285 | NULL); | |
5286 | if (ret) { | |
5287 | mlog_errno(ret); | |
5288 | goto out; | |
5289 | } | |
5290 | ||
5291 | ret = ocfs2_rm_xattr_cluster(inode, xb_bh, | |
5292 | p_blkno, e_cpos, num_clusters); | |
5293 | if (ret) { | |
5294 | mlog_errno(ret); | |
5295 | break; | |
5296 | } | |
5297 | ||
5298 | if (e_cpos == 0) | |
5299 | break; | |
5300 | ||
5301 | name_hash = e_cpos - 1; | |
5302 | } | |
5303 | ||
5304 | out: | |
5305 | return ret; | |
5306 | } | |
99219aea | 5307 | |
923f7f31 TY |
5308 | /* |
5309 | * 'security' attributes support | |
5310 | */ | |
5311 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
5312 | size_t list_size, const char *name, | |
5313 | size_t name_len) | |
5314 | { | |
5315 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
5316 | const size_t total_len = prefix_len + name_len + 1; | |
5317 | ||
5318 | if (list && total_len <= list_size) { | |
5319 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
5320 | memcpy(list + prefix_len, name, name_len); | |
5321 | list[prefix_len + name_len] = '\0'; | |
5322 | } | |
5323 | return total_len; | |
5324 | } | |
5325 | ||
5326 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
5327 | void *buffer, size_t size) | |
5328 | { | |
5329 | if (strcmp(name, "") == 0) | |
5330 | return -EINVAL; | |
5331 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
5332 | buffer, size); | |
5333 | } | |
5334 | ||
5335 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
5336 | const void *value, size_t size, int flags) | |
5337 | { | |
5338 | if (strcmp(name, "") == 0) | |
5339 | return -EINVAL; | |
5340 | ||
5341 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
5342 | size, flags); | |
5343 | } | |
5344 | ||
534eaddd TY |
5345 | int ocfs2_init_security_get(struct inode *inode, |
5346 | struct inode *dir, | |
5347 | struct ocfs2_security_xattr_info *si) | |
5348 | { | |
38d59ef6 TY |
5349 | /* check whether ocfs2 support feature xattr */ |
5350 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
5351 | return -EOPNOTSUPP; | |
534eaddd TY |
5352 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
5353 | &si->value_len); | |
5354 | } | |
5355 | ||
5356 | int ocfs2_init_security_set(handle_t *handle, | |
5357 | struct inode *inode, | |
5358 | struct buffer_head *di_bh, | |
5359 | struct ocfs2_security_xattr_info *si, | |
5360 | struct ocfs2_alloc_context *xattr_ac, | |
5361 | struct ocfs2_alloc_context *data_ac) | |
5362 | { | |
5363 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
5364 | OCFS2_XATTR_INDEX_SECURITY, | |
5365 | si->name, si->value, si->value_len, 0, | |
5366 | xattr_ac, data_ac); | |
5367 | } | |
5368 | ||
923f7f31 TY |
5369 | struct xattr_handler ocfs2_xattr_security_handler = { |
5370 | .prefix = XATTR_SECURITY_PREFIX, | |
5371 | .list = ocfs2_xattr_security_list, | |
5372 | .get = ocfs2_xattr_security_get, | |
5373 | .set = ocfs2_xattr_security_set, | |
5374 | }; | |
5375 | ||
99219aea MF |
5376 | /* |
5377 | * 'trusted' attributes support | |
5378 | */ | |
99219aea MF |
5379 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
5380 | size_t list_size, const char *name, | |
5381 | size_t name_len) | |
5382 | { | |
ceb1eba3 | 5383 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
5384 | const size_t total_len = prefix_len + name_len + 1; |
5385 | ||
5386 | if (list && total_len <= list_size) { | |
5387 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
5388 | memcpy(list + prefix_len, name, name_len); | |
5389 | list[prefix_len + name_len] = '\0'; | |
5390 | } | |
5391 | return total_len; | |
5392 | } | |
5393 | ||
5394 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
5395 | void *buffer, size_t size) | |
5396 | { | |
5397 | if (strcmp(name, "") == 0) | |
5398 | return -EINVAL; | |
5399 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
5400 | buffer, size); | |
5401 | } | |
5402 | ||
5403 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
5404 | const void *value, size_t size, int flags) | |
5405 | { | |
5406 | if (strcmp(name, "") == 0) | |
5407 | return -EINVAL; | |
5408 | ||
5409 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
5410 | size, flags); | |
5411 | } | |
5412 | ||
5413 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
5414 | .prefix = XATTR_TRUSTED_PREFIX, | |
5415 | .list = ocfs2_xattr_trusted_list, | |
5416 | .get = ocfs2_xattr_trusted_get, | |
5417 | .set = ocfs2_xattr_trusted_set, | |
5418 | }; | |
5419 | ||
99219aea MF |
5420 | /* |
5421 | * 'user' attributes support | |
5422 | */ | |
99219aea MF |
5423 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
5424 | size_t list_size, const char *name, | |
5425 | size_t name_len) | |
5426 | { | |
ceb1eba3 | 5427 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
5428 | const size_t total_len = prefix_len + name_len + 1; |
5429 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5430 | ||
5431 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5432 | return 0; | |
5433 | ||
5434 | if (list && total_len <= list_size) { | |
5435 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
5436 | memcpy(list + prefix_len, name, name_len); | |
5437 | list[prefix_len + name_len] = '\0'; | |
5438 | } | |
5439 | return total_len; | |
5440 | } | |
5441 | ||
5442 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
5443 | void *buffer, size_t size) | |
5444 | { | |
5445 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5446 | ||
5447 | if (strcmp(name, "") == 0) | |
5448 | return -EINVAL; | |
5449 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5450 | return -EOPNOTSUPP; | |
5451 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
5452 | buffer, size); | |
5453 | } | |
5454 | ||
5455 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
5456 | const void *value, size_t size, int flags) | |
5457 | { | |
5458 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5459 | ||
5460 | if (strcmp(name, "") == 0) | |
5461 | return -EINVAL; | |
5462 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
5463 | return -EOPNOTSUPP; | |
5464 | ||
5465 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
5466 | size, flags); | |
5467 | } | |
5468 | ||
5469 | struct xattr_handler ocfs2_xattr_user_handler = { | |
5470 | .prefix = XATTR_USER_PREFIX, | |
5471 | .list = ocfs2_xattr_user_list, | |
5472 | .get = ocfs2_xattr_user_get, | |
5473 | .set = ocfs2_xattr_user_set, | |
5474 | }; |