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f56654c4 TM |
1 | /* -*- mode: c; c-basic-offset: 8; -*- |
2 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
3 | * | |
4 | * xattr.c | |
5 | * | |
c3cb6827 | 6 | * Copyright (C) 2004, 2008 Oracle. All rights reserved. |
f56654c4 | 7 | * |
cf1d6c76 | 8 | * CREDITS: |
c3cb6827 TY |
9 | * Lots of code in this file is copy from linux/fs/ext3/xattr.c. |
10 | * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de> | |
cf1d6c76 | 11 | * |
f56654c4 TM |
12 | * This program is free software; you can redistribute it and/or |
13 | * modify it under the terms of the GNU General Public | |
c3cb6827 | 14 | * License version 2 as published by the Free Software Foundation. |
f56654c4 TM |
15 | * |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
f56654c4 TM |
20 | */ |
21 | ||
cf1d6c76 TY |
22 | #include <linux/capability.h> |
23 | #include <linux/fs.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/highmem.h> | |
27 | #include <linux/pagemap.h> | |
28 | #include <linux/uio.h> | |
29 | #include <linux/sched.h> | |
30 | #include <linux/splice.h> | |
31 | #include <linux/mount.h> | |
32 | #include <linux/writeback.h> | |
33 | #include <linux/falloc.h> | |
01225596 | 34 | #include <linux/sort.h> |
99219aea MF |
35 | #include <linux/init.h> |
36 | #include <linux/module.h> | |
37 | #include <linux/string.h> | |
923f7f31 | 38 | #include <linux/security.h> |
cf1d6c76 | 39 | |
f56654c4 TM |
40 | #define MLOG_MASK_PREFIX ML_XATTR |
41 | #include <cluster/masklog.h> | |
42 | ||
43 | #include "ocfs2.h" | |
44 | #include "alloc.h" | |
d6b32bbb | 45 | #include "blockcheck.h" |
f56654c4 TM |
46 | #include "dlmglue.h" |
47 | #include "file.h" | |
cf1d6c76 TY |
48 | #include "symlink.h" |
49 | #include "sysfile.h" | |
f56654c4 TM |
50 | #include "inode.h" |
51 | #include "journal.h" | |
52 | #include "ocfs2_fs.h" | |
53 | #include "suballoc.h" | |
54 | #include "uptodate.h" | |
55 | #include "buffer_head_io.h" | |
0c044f0b | 56 | #include "super.h" |
cf1d6c76 | 57 | #include "xattr.h" |
492a8a33 | 58 | #include "refcounttree.h" |
cf1d6c76 TY |
59 | |
60 | struct ocfs2_xattr_def_value_root { | |
61 | struct ocfs2_xattr_value_root xv; | |
62 | struct ocfs2_extent_rec er; | |
63 | }; | |
64 | ||
0c044f0b | 65 | struct ocfs2_xattr_bucket { |
ba937127 JB |
66 | /* The inode these xattrs are associated with */ |
67 | struct inode *bu_inode; | |
68 | ||
69 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 70 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
71 | |
72 | /* How many blocks make up one bucket for this filesystem */ | |
73 | int bu_blocks; | |
0c044f0b TM |
74 | }; |
75 | ||
78f30c31 | 76 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 77 | handle_t *handle; |
78f30c31 TM |
78 | struct ocfs2_alloc_context *meta_ac; |
79 | struct ocfs2_alloc_context *data_ac; | |
80 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
81 | }; | |
82 | ||
cf1d6c76 TY |
83 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
84 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 85 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
86 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
87 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 88 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
89 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
90 | - sizeof(struct ocfs2_xattr_block) \ | |
91 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 92 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
93 | |
94 | static struct ocfs2_xattr_def_value_root def_xv = { | |
95 | .xv.xr_list.l_count = cpu_to_le16(1), | |
96 | }; | |
97 | ||
98 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
99 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
100 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
101 | &ocfs2_xattr_acl_access_handler, | |
102 | &ocfs2_xattr_acl_default_handler, | |
103 | #endif | |
cf1d6c76 | 104 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 105 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
106 | NULL |
107 | }; | |
108 | ||
c988fd04 | 109 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
111 | #ifdef CONFIG_OCFS2_FS_POSIX_ACL |
112 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] | |
113 | = &ocfs2_xattr_acl_access_handler, | |
114 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
115 | = &ocfs2_xattr_acl_default_handler, | |
116 | #endif | |
cf1d6c76 | 117 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 118 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
119 | }; |
120 | ||
121 | struct ocfs2_xattr_info { | |
122 | int name_index; | |
123 | const char *name; | |
124 | const void *value; | |
125 | size_t value_len; | |
126 | }; | |
127 | ||
128 | struct ocfs2_xattr_search { | |
129 | struct buffer_head *inode_bh; | |
130 | /* | |
131 | * xattr_bh point to the block buffer head which has extended attribute | |
132 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
133 | */ | |
134 | struct buffer_head *xattr_bh; | |
135 | struct ocfs2_xattr_header *header; | |
ba937127 | 136 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
137 | void *base; |
138 | void *end; | |
139 | struct ocfs2_xattr_entry *here; | |
140 | int not_found; | |
141 | }; | |
142 | ||
fd68a894 | 143 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
144 | struct ocfs2_xattr_header *xh, |
145 | int index, | |
146 | int *block_off, | |
147 | int *new_offset); | |
148 | ||
54f443f4 JB |
149 | static int ocfs2_xattr_block_find(struct inode *inode, |
150 | int name_index, | |
151 | const char *name, | |
152 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
153 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
154 | struct buffer_head *root_bh, | |
155 | int name_index, | |
156 | const char *name, | |
157 | struct ocfs2_xattr_search *xs); | |
158 | ||
0c044f0b | 159 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 160 | struct buffer_head *blk_bh, |
0c044f0b TM |
161 | char *buffer, |
162 | size_t buffer_size); | |
163 | ||
01225596 | 164 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
165 | struct ocfs2_xattr_search *xs, |
166 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
167 | |
168 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
169 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
170 | struct ocfs2_xattr_search *xs, |
171 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 172 | |
47bca495 TM |
173 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
174 | struct buffer_head *root_bh, | |
175 | u64 blkno, u32 cpos, u32 len, void *para); | |
176 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
177 | struct buffer_head *root_bh, | |
178 | xattr_tree_rec_func *rec_func, | |
179 | void *para); | |
180 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
181 | struct ocfs2_xattr_bucket *bucket, | |
182 | void *para); | |
183 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
184 | struct buffer_head *root_bh, | |
185 | u64 blkno, | |
186 | u32 cpos, | |
187 | u32 len, | |
188 | void *para); | |
189 | ||
c58b6032 JB |
190 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
191 | u64 src_blk, u64 last_blk, u64 to_blk, | |
192 | unsigned int start_bucket, | |
193 | u32 *first_hash); | |
492a8a33 TM |
194 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
195 | struct ocfs2_dinode *di, | |
196 | struct ocfs2_xattr_info *xi, | |
197 | struct ocfs2_xattr_search *xis, | |
198 | struct ocfs2_xattr_search *xbs, | |
199 | struct ocfs2_refcount_tree **ref_tree, | |
200 | int *meta_need, | |
201 | int *credits); | |
ce9c5a54 TM |
202 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
203 | struct ocfs2_xattr_bucket *bucket, | |
204 | int offset, | |
205 | struct ocfs2_xattr_value_root **xv, | |
206 | struct buffer_head **bh); | |
a3944256 | 207 | |
0030e001 TY |
208 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
209 | { | |
210 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
211 | } | |
212 | ||
213 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
214 | { | |
215 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
216 | } | |
217 | ||
218 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
219 | { | |
220 | u16 len = sb->s_blocksize - | |
221 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
222 | ||
223 | return len / sizeof(struct ocfs2_xattr_entry); | |
224 | } | |
225 | ||
9c7759aa | 226 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 227 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 228 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 229 | |
ba937127 | 230 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 231 | { |
ba937127 JB |
232 | struct ocfs2_xattr_bucket *bucket; |
233 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 234 | |
ba937127 JB |
235 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
236 | ||
237 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
238 | if (bucket) { | |
239 | bucket->bu_inode = inode; | |
240 | bucket->bu_blocks = blks; | |
241 | } | |
242 | ||
243 | return bucket; | |
244 | } | |
245 | ||
246 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
247 | { | |
248 | int i; | |
249 | ||
250 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
251 | brelse(bucket->bu_bhs[i]); |
252 | bucket->bu_bhs[i] = NULL; | |
253 | } | |
254 | } | |
255 | ||
ba937127 JB |
256 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
257 | { | |
258 | if (bucket) { | |
259 | ocfs2_xattr_bucket_relse(bucket); | |
260 | bucket->bu_inode = NULL; | |
261 | kfree(bucket); | |
262 | } | |
263 | } | |
264 | ||
784b816a JB |
265 | /* |
266 | * A bucket that has never been written to disk doesn't need to be | |
267 | * read. We just need the buffer_heads. Don't call this for | |
268 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
269 | * them fully. | |
270 | */ | |
ba937127 | 271 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
272 | u64 xb_blkno) |
273 | { | |
274 | int i, rc = 0; | |
784b816a | 275 | |
ba937127 JB |
276 | for (i = 0; i < bucket->bu_blocks; i++) { |
277 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
278 | xb_blkno + i); | |
784b816a JB |
279 | if (!bucket->bu_bhs[i]) { |
280 | rc = -EIO; | |
281 | mlog_errno(rc); | |
282 | break; | |
283 | } | |
284 | ||
8cb471e8 | 285 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 286 | bucket->bu_bhs[i])) |
8cb471e8 | 287 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 288 | bucket->bu_bhs[i]); |
784b816a JB |
289 | } |
290 | ||
291 | if (rc) | |
ba937127 | 292 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
293 | return rc; |
294 | } | |
295 | ||
296 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 297 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
298 | u64 xb_blkno) |
299 | { | |
ba937127 | 300 | int rc; |
784b816a | 301 | |
8cb471e8 | 302 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
303 | bucket->bu_blocks, bucket->bu_bhs, 0, |
304 | NULL); | |
4d0e214e | 305 | if (!rc) { |
c8b9cf9a | 306 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
307 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
308 | bucket->bu_bhs, | |
309 | bucket->bu_blocks, | |
310 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 311 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
312 | if (rc) |
313 | mlog_errno(rc); | |
314 | } | |
315 | ||
784b816a | 316 | if (rc) |
ba937127 | 317 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
318 | return rc; |
319 | } | |
320 | ||
1224be02 | 321 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
322 | struct ocfs2_xattr_bucket *bucket, |
323 | int type) | |
324 | { | |
325 | int i, rc = 0; | |
1224be02 | 326 | |
ba937127 | 327 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
328 | rc = ocfs2_journal_access(handle, |
329 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
330 | bucket->bu_bhs[i], type); |
331 | if (rc) { | |
332 | mlog_errno(rc); | |
333 | break; | |
334 | } | |
335 | } | |
336 | ||
337 | return rc; | |
338 | } | |
339 | ||
340 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
341 | struct ocfs2_xattr_bucket *bucket) |
342 | { | |
ba937127 | 343 | int i; |
1224be02 | 344 | |
c8b9cf9a | 345 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
346 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
347 | bucket->bu_bhs, bucket->bu_blocks, | |
348 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 349 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 350 | |
ba937127 | 351 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
352 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
353 | } | |
354 | ||
ba937127 | 355 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
356 | struct ocfs2_xattr_bucket *src) |
357 | { | |
358 | int i; | |
ba937127 JB |
359 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
360 | ||
361 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
362 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 363 | |
ba937127 | 364 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
365 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
366 | blocksize); | |
367 | } | |
368 | } | |
1224be02 | 369 | |
4ae1d69b JB |
370 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
371 | struct buffer_head *bh) | |
372 | { | |
d6b32bbb | 373 | int rc; |
4ae1d69b JB |
374 | struct ocfs2_xattr_block *xb = |
375 | (struct ocfs2_xattr_block *)bh->b_data; | |
376 | ||
377 | mlog(0, "Validating xattr block %llu\n", | |
378 | (unsigned long long)bh->b_blocknr); | |
379 | ||
d6b32bbb JB |
380 | BUG_ON(!buffer_uptodate(bh)); |
381 | ||
382 | /* | |
383 | * If the ecc fails, we return the error but otherwise | |
384 | * leave the filesystem running. We know any error is | |
385 | * local to this block. | |
386 | */ | |
387 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
388 | if (rc) | |
389 | return rc; | |
390 | ||
391 | /* | |
392 | * Errors after here are fatal | |
393 | */ | |
394 | ||
4ae1d69b JB |
395 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
396 | ocfs2_error(sb, | |
397 | "Extended attribute block #%llu has bad " | |
398 | "signature %.*s", | |
399 | (unsigned long long)bh->b_blocknr, 7, | |
400 | xb->xb_signature); | |
401 | return -EINVAL; | |
402 | } | |
403 | ||
404 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
405 | ocfs2_error(sb, | |
406 | "Extended attribute block #%llu has an " | |
407 | "invalid xb_blkno of %llu", | |
408 | (unsigned long long)bh->b_blocknr, | |
409 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
410 | return -EINVAL; | |
411 | } | |
412 | ||
413 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
414 | ocfs2_error(sb, | |
415 | "Extended attribute block #%llu has an invalid " | |
416 | "xb_fs_generation of #%u", | |
417 | (unsigned long long)bh->b_blocknr, | |
418 | le32_to_cpu(xb->xb_fs_generation)); | |
419 | return -EINVAL; | |
420 | } | |
421 | ||
422 | return 0; | |
423 | } | |
424 | ||
425 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
426 | struct buffer_head **bh) | |
427 | { | |
428 | int rc; | |
429 | struct buffer_head *tmp = *bh; | |
430 | ||
8cb471e8 | 431 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 432 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
433 | |
434 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
435 | if (!rc && !*bh) | |
436 | *bh = tmp; | |
437 | ||
438 | return rc; | |
439 | } | |
440 | ||
936b8834 | 441 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
442 | { |
443 | struct xattr_handler *handler = NULL; | |
444 | ||
445 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
446 | handler = ocfs2_xattr_handler_map[name_index]; | |
447 | ||
936b8834 | 448 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
449 | } |
450 | ||
40daa16a | 451 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 452 | const char *name, |
40daa16a | 453 | int name_len) |
cf1d6c76 TY |
454 | { |
455 | /* Get hash value of uuid from super block */ | |
456 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
457 | int i; | |
458 | ||
cf1d6c76 TY |
459 | /* hash extended attribute name */ |
460 | for (i = 0; i < name_len; i++) { | |
461 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
462 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
463 | *name++; | |
464 | } | |
465 | ||
466 | return hash; | |
467 | } | |
468 | ||
469 | /* | |
470 | * ocfs2_xattr_hash_entry() | |
471 | * | |
472 | * Compute the hash of an extended attribute. | |
473 | */ | |
474 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
475 | struct ocfs2_xattr_header *header, | |
476 | struct ocfs2_xattr_entry *entry) | |
477 | { | |
478 | u32 hash = 0; | |
cf1d6c76 | 479 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 480 | |
2057e5c6 | 481 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
482 | entry->xe_name_hash = cpu_to_le32(hash); |
483 | ||
484 | return; | |
485 | } | |
f56654c4 | 486 | |
534eaddd TY |
487 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
488 | { | |
489 | int size = 0; | |
490 | ||
491 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
492 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
493 | else | |
494 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
495 | size += sizeof(struct ocfs2_xattr_entry); | |
496 | ||
497 | return size; | |
498 | } | |
499 | ||
500 | int ocfs2_calc_security_init(struct inode *dir, | |
501 | struct ocfs2_security_xattr_info *si, | |
502 | int *want_clusters, | |
503 | int *xattr_credits, | |
504 | struct ocfs2_alloc_context **xattr_ac) | |
505 | { | |
506 | int ret = 0; | |
507 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
508 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
509 | si->value_len); | |
510 | ||
511 | /* | |
512 | * The max space of security xattr taken inline is | |
513 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
514 | * So reserve one metadata block for it is ok. | |
515 | */ | |
516 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
517 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
518 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
519 | if (ret) { | |
520 | mlog_errno(ret); | |
521 | return ret; | |
522 | } | |
523 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
524 | } | |
525 | ||
526 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
527 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
528 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
529 | si->value_len); | |
530 | ||
531 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
532 | new_clusters); | |
533 | *want_clusters += new_clusters; | |
534 | } | |
534eaddd TY |
535 | return ret; |
536 | } | |
537 | ||
89c38bd0 TY |
538 | int ocfs2_calc_xattr_init(struct inode *dir, |
539 | struct buffer_head *dir_bh, | |
540 | int mode, | |
541 | struct ocfs2_security_xattr_info *si, | |
542 | int *want_clusters, | |
543 | int *xattr_credits, | |
9b7895ef | 544 | int *want_meta) |
89c38bd0 TY |
545 | { |
546 | int ret = 0; | |
547 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 548 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
549 | |
550 | if (si->enable) | |
551 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
552 | si->value_len); | |
553 | ||
554 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
555 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
556 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
557 | "", NULL, 0); | |
558 | if (acl_len > 0) { | |
559 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
560 | if (S_ISDIR(mode)) | |
561 | a_size <<= 1; | |
562 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
563 | mlog_errno(ret); | |
564 | return ret; | |
565 | } | |
566 | } | |
567 | ||
568 | if (!(s_size + a_size)) | |
569 | return ret; | |
570 | ||
571 | /* | |
572 | * The max space of security xattr taken inline is | |
573 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
574 | * The max space of acl xattr taken inline is | |
575 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
576 | * when blocksize = 512, may reserve one more cluser for | |
577 | * xattr bucket, otherwise reserve one metadata block | |
578 | * for them is ok. | |
6c9fd1dc TY |
579 | * If this is a new directory with inline data, |
580 | * we choose to reserve the entire inline area for | |
581 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
582 | */ |
583 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 584 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 585 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 586 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
587 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
588 | } | |
589 | ||
590 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
591 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
592 | *want_clusters += 1; | |
593 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
594 | } | |
595 | ||
0e445b6f TY |
596 | /* |
597 | * reserve credits and clusters for xattrs which has large value | |
598 | * and have to be set outside | |
599 | */ | |
600 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
601 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
602 | si->value_len); | |
603 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
604 | new_clusters); | |
605 | *want_clusters += new_clusters; | |
606 | } | |
89c38bd0 TY |
607 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
608 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
609 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
610 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
611 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
612 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
613 | new_clusters); | |
614 | *want_clusters += new_clusters; | |
89c38bd0 TY |
615 | } |
616 | ||
617 | return ret; | |
618 | } | |
619 | ||
f56654c4 TM |
620 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
621 | u32 clusters_to_add, | |
19b801f4 | 622 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 623 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
624 | { |
625 | int status = 0; | |
85db90e7 | 626 | handle_t *handle = ctxt->handle; |
f56654c4 | 627 | enum ocfs2_alloc_restarted why; |
19b801f4 | 628 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 629 | struct ocfs2_extent_tree et; |
f56654c4 TM |
630 | |
631 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
632 | ||
5e404e9e | 633 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 634 | |
0cf2f763 | 635 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 636 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
637 | if (status < 0) { |
638 | mlog_errno(status); | |
639 | goto leave; | |
640 | } | |
641 | ||
19b801f4 | 642 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
cbee7e1a JB |
643 | status = ocfs2_add_clusters_in_btree(handle, |
644 | &et, | |
f56654c4 TM |
645 | &logical_start, |
646 | clusters_to_add, | |
647 | 0, | |
78f30c31 TM |
648 | ctxt->data_ac, |
649 | ctxt->meta_ac, | |
f99b9b7c | 650 | &why); |
85db90e7 TM |
651 | if (status < 0) { |
652 | mlog_errno(status); | |
f56654c4 TM |
653 | goto leave; |
654 | } | |
655 | ||
19b801f4 | 656 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
657 | if (status < 0) { |
658 | mlog_errno(status); | |
659 | goto leave; | |
660 | } | |
661 | ||
19b801f4 | 662 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 663 | |
85db90e7 TM |
664 | /* |
665 | * We should have already allocated enough space before the transaction, | |
666 | * so no need to restart. | |
667 | */ | |
668 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
669 | |
670 | leave: | |
f56654c4 TM |
671 | |
672 | return status; | |
673 | } | |
674 | ||
675 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 676 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 677 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 678 | unsigned int ext_flags, |
78f30c31 | 679 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
680 | { |
681 | int ret; | |
682 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 683 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
684 | struct ocfs2_extent_tree et; |
685 | ||
5e404e9e | 686 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 687 | |
0cf2f763 | 688 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 689 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
690 | if (ret) { |
691 | mlog_errno(ret); | |
85db90e7 | 692 | goto out; |
f56654c4 TM |
693 | } |
694 | ||
dbdcf6a4 | 695 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 696 | &ctxt->dealloc); |
f56654c4 TM |
697 | if (ret) { |
698 | mlog_errno(ret); | |
85db90e7 | 699 | goto out; |
f56654c4 TM |
700 | } |
701 | ||
d72cc72d | 702 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 703 | |
d72cc72d | 704 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
705 | if (ret) { |
706 | mlog_errno(ret); | |
85db90e7 | 707 | goto out; |
f56654c4 TM |
708 | } |
709 | ||
492a8a33 TM |
710 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
711 | ret = ocfs2_decrease_refcount(inode, handle, | |
712 | ocfs2_blocks_to_clusters(inode->i_sb, | |
713 | phys_blkno), | |
714 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
715 | else | |
716 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
717 | phys_blkno, len); | |
f56654c4 TM |
718 | if (ret) |
719 | mlog_errno(ret); | |
720 | ||
f56654c4 | 721 | out: |
f56654c4 TM |
722 | return ret; |
723 | } | |
724 | ||
725 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
726 | u32 old_clusters, | |
727 | u32 new_clusters, | |
19b801f4 | 728 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 729 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
730 | { |
731 | int ret = 0; | |
492a8a33 | 732 | unsigned int ext_flags; |
f56654c4 TM |
733 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
734 | u64 block; | |
f56654c4 TM |
735 | |
736 | if (old_clusters <= new_clusters) | |
737 | return 0; | |
738 | ||
739 | cpos = new_clusters; | |
740 | trunc_len = old_clusters - new_clusters; | |
741 | while (trunc_len) { | |
742 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 743 | &alloc_size, |
492a8a33 | 744 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
745 | if (ret) { |
746 | mlog_errno(ret); | |
747 | goto out; | |
748 | } | |
749 | ||
750 | if (alloc_size > trunc_len) | |
751 | alloc_size = trunc_len; | |
752 | ||
19b801f4 | 753 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 754 | phys_cpos, alloc_size, |
492a8a33 | 755 | ext_flags, ctxt); |
f56654c4 TM |
756 | if (ret) { |
757 | mlog_errno(ret); | |
758 | goto out; | |
759 | } | |
760 | ||
761 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
762 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
763 | block, alloc_size); | |
f56654c4 TM |
764 | cpos += alloc_size; |
765 | trunc_len -= alloc_size; | |
766 | } | |
767 | ||
768 | out: | |
f56654c4 TM |
769 | return ret; |
770 | } | |
771 | ||
772 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 773 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
774 | int len, |
775 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
776 | { |
777 | int ret; | |
778 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 779 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
780 | |
781 | if (new_clusters == old_clusters) | |
782 | return 0; | |
783 | ||
784 | if (new_clusters > old_clusters) | |
785 | ret = ocfs2_xattr_extend_allocation(inode, | |
786 | new_clusters - old_clusters, | |
b3e5d379 | 787 | vb, ctxt); |
f56654c4 TM |
788 | else |
789 | ret = ocfs2_xattr_shrink_size(inode, | |
790 | old_clusters, new_clusters, | |
b3e5d379 | 791 | vb, ctxt); |
f56654c4 TM |
792 | |
793 | return ret; | |
794 | } | |
cf1d6c76 | 795 | |
936b8834 TM |
796 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
797 | size_t *result, const char *prefix, | |
798 | const char *name, int name_len) | |
799 | { | |
800 | char *p = buffer + *result; | |
801 | int prefix_len = strlen(prefix); | |
802 | int total_len = prefix_len + name_len + 1; | |
803 | ||
804 | *result += total_len; | |
805 | ||
806 | /* we are just looking for how big our buffer needs to be */ | |
807 | if (!size) | |
808 | return 0; | |
809 | ||
810 | if (*result > size) | |
811 | return -ERANGE; | |
812 | ||
813 | memcpy(p, prefix, prefix_len); | |
814 | memcpy(p + prefix_len, name, name_len); | |
815 | p[prefix_len + name_len] = '\0'; | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
cf1d6c76 TY |
820 | static int ocfs2_xattr_list_entries(struct inode *inode, |
821 | struct ocfs2_xattr_header *header, | |
822 | char *buffer, size_t buffer_size) | |
823 | { | |
936b8834 TM |
824 | size_t result = 0; |
825 | int i, type, ret; | |
826 | const char *prefix, *name; | |
cf1d6c76 TY |
827 | |
828 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
829 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
830 | type = ocfs2_xattr_get_type(entry); |
831 | prefix = ocfs2_xattr_prefix(type); | |
832 | ||
833 | if (prefix) { | |
834 | name = (const char *)header + | |
835 | le16_to_cpu(entry->xe_name_offset); | |
836 | ||
837 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
838 | &result, prefix, name, | |
839 | entry->xe_name_len); | |
840 | if (ret) | |
841 | return ret; | |
cf1d6c76 TY |
842 | } |
843 | } | |
844 | ||
936b8834 | 845 | return result; |
cf1d6c76 TY |
846 | } |
847 | ||
8b2c0dba TM |
848 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
849 | struct ocfs2_dinode *di) | |
850 | { | |
851 | struct ocfs2_xattr_header *xh; | |
852 | int i; | |
853 | ||
854 | xh = (struct ocfs2_xattr_header *) | |
855 | ((void *)di + inode->i_sb->s_blocksize - | |
856 | le16_to_cpu(di->i_xattr_inline_size)); | |
857 | ||
858 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
859 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
860 | return 1; | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
cf1d6c76 TY |
865 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
866 | struct ocfs2_dinode *di, | |
867 | char *buffer, | |
868 | size_t buffer_size) | |
869 | { | |
870 | struct ocfs2_xattr_header *header = NULL; | |
871 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
872 | int ret = 0; | |
873 | ||
874 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
875 | return ret; | |
876 | ||
877 | header = (struct ocfs2_xattr_header *) | |
878 | ((void *)di + inode->i_sb->s_blocksize - | |
879 | le16_to_cpu(di->i_xattr_inline_size)); | |
880 | ||
881 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
882 | ||
883 | return ret; | |
884 | } | |
885 | ||
886 | static int ocfs2_xattr_block_list(struct inode *inode, | |
887 | struct ocfs2_dinode *di, | |
888 | char *buffer, | |
889 | size_t buffer_size) | |
890 | { | |
891 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 892 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
893 | int ret = 0; |
894 | ||
895 | if (!di->i_xattr_loc) | |
896 | return ret; | |
897 | ||
4ae1d69b JB |
898 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
899 | &blk_bh); | |
cf1d6c76 TY |
900 | if (ret < 0) { |
901 | mlog_errno(ret); | |
902 | return ret; | |
903 | } | |
cf1d6c76 | 904 | |
0c044f0b | 905 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
906 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
907 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
908 | ret = ocfs2_xattr_list_entries(inode, header, | |
909 | buffer, buffer_size); | |
47bca495 TM |
910 | } else |
911 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 912 | buffer, buffer_size); |
4ae1d69b | 913 | |
cf1d6c76 TY |
914 | brelse(blk_bh); |
915 | ||
916 | return ret; | |
917 | } | |
918 | ||
919 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
920 | char *buffer, | |
921 | size_t size) | |
922 | { | |
923 | int ret = 0, i_ret = 0, b_ret = 0; | |
924 | struct buffer_head *di_bh = NULL; | |
925 | struct ocfs2_dinode *di = NULL; | |
926 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
927 | ||
8154da3d TY |
928 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
929 | return -EOPNOTSUPP; | |
930 | ||
cf1d6c76 TY |
931 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
932 | return ret; | |
933 | ||
934 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
935 | if (ret < 0) { | |
936 | mlog_errno(ret); | |
937 | return ret; | |
938 | } | |
939 | ||
940 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
941 | ||
942 | down_read(&oi->ip_xattr_sem); | |
943 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
944 | if (i_ret < 0) | |
945 | b_ret = 0; | |
946 | else { | |
947 | if (buffer) { | |
948 | buffer += i_ret; | |
949 | size -= i_ret; | |
950 | } | |
951 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
952 | buffer, size); | |
953 | if (b_ret < 0) | |
954 | i_ret = 0; | |
955 | } | |
956 | up_read(&oi->ip_xattr_sem); | |
957 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
958 | ||
959 | brelse(di_bh); | |
960 | ||
961 | return i_ret + b_ret; | |
962 | } | |
963 | ||
964 | static int ocfs2_xattr_find_entry(int name_index, | |
965 | const char *name, | |
966 | struct ocfs2_xattr_search *xs) | |
967 | { | |
968 | struct ocfs2_xattr_entry *entry; | |
969 | size_t name_len; | |
970 | int i, cmp = 1; | |
971 | ||
972 | if (name == NULL) | |
973 | return -EINVAL; | |
974 | ||
975 | name_len = strlen(name); | |
976 | entry = xs->here; | |
977 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
978 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
979 | if (!cmp) | |
980 | cmp = name_len - entry->xe_name_len; | |
981 | if (!cmp) | |
982 | cmp = memcmp(name, (xs->base + | |
983 | le16_to_cpu(entry->xe_name_offset)), | |
984 | name_len); | |
985 | if (cmp == 0) | |
986 | break; | |
987 | entry += 1; | |
988 | } | |
989 | xs->here = entry; | |
990 | ||
991 | return cmp ? -ENODATA : 0; | |
992 | } | |
993 | ||
994 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 995 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
996 | void *buffer, |
997 | size_t len) | |
998 | { | |
999 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1000 | u64 blkno; | |
1001 | int i, ret = 0; | |
1002 | size_t cplen, blocksize; | |
1003 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1004 | struct ocfs2_extent_list *el; |
1005 | ||
cf1d6c76 TY |
1006 | el = &xv->xr_list; |
1007 | clusters = le32_to_cpu(xv->xr_clusters); | |
1008 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1009 | blocksize = inode->i_sb->s_blocksize; | |
1010 | ||
1011 | cpos = 0; | |
1012 | while (cpos < clusters) { | |
1013 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1014 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1015 | if (ret) { |
1016 | mlog_errno(ret); | |
1017 | goto out; | |
1018 | } | |
1019 | ||
1020 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1021 | /* Copy ocfs2_xattr_value */ | |
1022 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1023 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1024 | &bh, NULL); | |
cf1d6c76 TY |
1025 | if (ret) { |
1026 | mlog_errno(ret); | |
1027 | goto out; | |
1028 | } | |
1029 | ||
1030 | cplen = len >= blocksize ? blocksize : len; | |
1031 | memcpy(buffer, bh->b_data, cplen); | |
1032 | len -= cplen; | |
1033 | buffer += cplen; | |
1034 | ||
1035 | brelse(bh); | |
1036 | bh = NULL; | |
1037 | if (len == 0) | |
1038 | break; | |
1039 | } | |
1040 | cpos += num_clusters; | |
1041 | } | |
1042 | out: | |
1043 | return ret; | |
1044 | } | |
1045 | ||
1046 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1047 | int name_index, | |
1048 | const char *name, | |
1049 | void *buffer, | |
1050 | size_t buffer_size, | |
1051 | struct ocfs2_xattr_search *xs) | |
1052 | { | |
1053 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1054 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1055 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1056 | size_t size; |
1057 | int ret = 0; | |
1058 | ||
1059 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1060 | return -ENODATA; | |
1061 | ||
1062 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1063 | xs->header = (struct ocfs2_xattr_header *) | |
1064 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1065 | xs->base = (void *)xs->header; | |
1066 | xs->here = xs->header->xh_entries; | |
1067 | ||
1068 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1069 | if (ret) | |
1070 | return ret; | |
1071 | size = le64_to_cpu(xs->here->xe_value_size); | |
1072 | if (buffer) { | |
1073 | if (size > buffer_size) | |
1074 | return -ERANGE; | |
1075 | if (ocfs2_xattr_is_local(xs->here)) { | |
1076 | memcpy(buffer, (void *)xs->base + | |
1077 | le16_to_cpu(xs->here->xe_name_offset) + | |
1078 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1079 | } else { | |
589dc260 TM |
1080 | xv = (struct ocfs2_xattr_value_root *) |
1081 | (xs->base + le16_to_cpu( | |
1082 | xs->here->xe_name_offset) + | |
1083 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1084 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1085 | buffer, size); |
1086 | if (ret < 0) { | |
1087 | mlog_errno(ret); | |
1088 | return ret; | |
1089 | } | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | return size; | |
1094 | } | |
1095 | ||
1096 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1097 | int name_index, | |
1098 | const char *name, | |
1099 | void *buffer, | |
1100 | size_t buffer_size, | |
1101 | struct ocfs2_xattr_search *xs) | |
1102 | { | |
cf1d6c76 | 1103 | struct ocfs2_xattr_block *xb; |
589dc260 | 1104 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1105 | size_t size; |
44d8e4e1 SM |
1106 | int ret = -ENODATA, name_offset, name_len, i; |
1107 | int uninitialized_var(block_off); | |
cf1d6c76 | 1108 | |
ba937127 JB |
1109 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1110 | if (!xs->bucket) { | |
1111 | ret = -ENOMEM; | |
1112 | mlog_errno(ret); | |
1113 | goto cleanup; | |
1114 | } | |
589dc260 | 1115 | |
54f443f4 JB |
1116 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1117 | if (ret) { | |
cf1d6c76 | 1118 | mlog_errno(ret); |
cf1d6c76 TY |
1119 | goto cleanup; |
1120 | } | |
1121 | ||
6c1e183e TY |
1122 | if (xs->not_found) { |
1123 | ret = -ENODATA; | |
1124 | goto cleanup; | |
1125 | } | |
1126 | ||
54f443f4 | 1127 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1128 | size = le64_to_cpu(xs->here->xe_value_size); |
1129 | if (buffer) { | |
1130 | ret = -ERANGE; | |
1131 | if (size > buffer_size) | |
1132 | goto cleanup; | |
589dc260 TM |
1133 | |
1134 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1135 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1136 | i = xs->here - xs->header->xh_entries; | |
1137 | ||
1138 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1139 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1140 | bucket_xh(xs->bucket), |
589dc260 TM |
1141 | i, |
1142 | &block_off, | |
1143 | &name_offset); | |
ba937127 | 1144 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1145 | } |
cf1d6c76 TY |
1146 | if (ocfs2_xattr_is_local(xs->here)) { |
1147 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1148 | name_offset + name_len, size); |
cf1d6c76 | 1149 | } else { |
589dc260 TM |
1150 | xv = (struct ocfs2_xattr_value_root *) |
1151 | (xs->base + name_offset + name_len); | |
1152 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1153 | buffer, size); |
1154 | if (ret < 0) { | |
1155 | mlog_errno(ret); | |
1156 | goto cleanup; | |
1157 | } | |
1158 | } | |
1159 | } | |
1160 | ret = size; | |
1161 | cleanup: | |
ba937127 | 1162 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1163 | |
54f443f4 JB |
1164 | brelse(xs->xattr_bh); |
1165 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1166 | return ret; |
1167 | } | |
1168 | ||
4e3e9d02 TY |
1169 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1170 | struct buffer_head *di_bh, | |
0030e001 TY |
1171 | int name_index, |
1172 | const char *name, | |
1173 | void *buffer, | |
1174 | size_t buffer_size) | |
cf1d6c76 TY |
1175 | { |
1176 | int ret; | |
1177 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1178 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1179 | struct ocfs2_xattr_search xis = { | |
1180 | .not_found = -ENODATA, | |
1181 | }; | |
1182 | struct ocfs2_xattr_search xbs = { | |
1183 | .not_found = -ENODATA, | |
1184 | }; | |
1185 | ||
8154da3d TY |
1186 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1187 | return -EOPNOTSUPP; | |
1188 | ||
cf1d6c76 TY |
1189 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1190 | ret = -ENODATA; | |
1191 | ||
cf1d6c76 TY |
1192 | xis.inode_bh = xbs.inode_bh = di_bh; |
1193 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1194 | ||
1195 | down_read(&oi->ip_xattr_sem); | |
1196 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1197 | buffer_size, &xis); | |
6c1e183e | 1198 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1199 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1200 | buffer_size, &xbs); | |
1201 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1202 | |
1203 | return ret; | |
1204 | } | |
1205 | ||
1206 | /* ocfs2_xattr_get() | |
1207 | * | |
1208 | * Copy an extended attribute into the buffer provided. | |
1209 | * Buffer is NULL to compute the size of buffer required. | |
1210 | */ | |
1211 | static int ocfs2_xattr_get(struct inode *inode, | |
1212 | int name_index, | |
1213 | const char *name, | |
1214 | void *buffer, | |
1215 | size_t buffer_size) | |
1216 | { | |
1217 | int ret; | |
1218 | struct buffer_head *di_bh = NULL; | |
1219 | ||
1220 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1221 | if (ret < 0) { | |
1222 | mlog_errno(ret); | |
1223 | return ret; | |
1224 | } | |
1225 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1226 | name, buffer, buffer_size); | |
1227 | ||
cf1d6c76 TY |
1228 | ocfs2_inode_unlock(inode, 0); |
1229 | ||
1230 | brelse(di_bh); | |
1231 | ||
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1236 | handle_t *handle, |
492a8a33 | 1237 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1238 | const void *value, |
1239 | int value_len) | |
1240 | { | |
71d548a6 | 1241 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1242 | u16 blocksize = inode->i_sb->s_blocksize; |
1243 | u32 p_cluster, num_clusters; | |
1244 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1245 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1246 | u64 blkno; | |
1247 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1248 | unsigned int ext_flags; |
1249 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1250 | |
1251 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1252 | ||
cf1d6c76 TY |
1253 | while (cpos < clusters) { |
1254 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1255 | &num_clusters, &xv->xr_list, |
492a8a33 | 1256 | &ext_flags); |
cf1d6c76 TY |
1257 | if (ret) { |
1258 | mlog_errno(ret); | |
85db90e7 | 1259 | goto out; |
cf1d6c76 TY |
1260 | } |
1261 | ||
492a8a33 TM |
1262 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1263 | ||
cf1d6c76 TY |
1264 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1265 | ||
1266 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1267 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1268 | &bh, NULL); | |
cf1d6c76 TY |
1269 | if (ret) { |
1270 | mlog_errno(ret); | |
85db90e7 | 1271 | goto out; |
cf1d6c76 TY |
1272 | } |
1273 | ||
1274 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1275 | INODE_CACHE(inode), |
cf1d6c76 TY |
1276 | bh, |
1277 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1278 | if (ret < 0) { | |
1279 | mlog_errno(ret); | |
85db90e7 | 1280 | goto out; |
cf1d6c76 TY |
1281 | } |
1282 | ||
1283 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1284 | memcpy(bh->b_data, value, cp_len); | |
1285 | value_len -= cp_len; | |
1286 | value += cp_len; | |
1287 | if (cp_len < blocksize) | |
1288 | memset(bh->b_data + cp_len, 0, | |
1289 | blocksize - cp_len); | |
1290 | ||
1291 | ret = ocfs2_journal_dirty(handle, bh); | |
1292 | if (ret < 0) { | |
1293 | mlog_errno(ret); | |
85db90e7 | 1294 | goto out; |
cf1d6c76 TY |
1295 | } |
1296 | brelse(bh); | |
1297 | bh = NULL; | |
1298 | ||
1299 | /* | |
1300 | * XXX: do we need to empty all the following | |
1301 | * blocks in this cluster? | |
1302 | */ | |
1303 | if (!value_len) | |
1304 | break; | |
1305 | } | |
1306 | cpos += num_clusters; | |
1307 | } | |
cf1d6c76 TY |
1308 | out: |
1309 | brelse(bh); | |
1310 | ||
1311 | return ret; | |
1312 | } | |
1313 | ||
1314 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1315 | handle_t *handle, |
cf1d6c76 TY |
1316 | struct ocfs2_xattr_info *xi, |
1317 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1318 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1319 | size_t offs) |
1320 | { | |
cf1d6c76 TY |
1321 | int ret = 0; |
1322 | size_t name_len = strlen(xi->name); | |
1323 | void *val = xs->base + offs; | |
1324 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1325 | ||
0cf2f763 | 1326 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
512620f4 | 1327 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1328 | if (ret) { |
1329 | mlog_errno(ret); | |
85db90e7 | 1330 | goto out; |
cf1d6c76 TY |
1331 | } |
1332 | /* Decrease xattr count */ | |
1333 | le16_add_cpu(&xs->header->xh_count, -1); | |
1334 | /* Remove the xattr entry and tree root which has already be set*/ | |
1335 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1336 | memset(val, 0, size); | |
1337 | ||
512620f4 | 1338 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1339 | if (ret < 0) |
1340 | mlog_errno(ret); | |
cf1d6c76 TY |
1341 | out: |
1342 | return ret; | |
1343 | } | |
1344 | ||
1345 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1346 | handle_t *handle, |
cf1d6c76 TY |
1347 | struct ocfs2_xattr_info *xi, |
1348 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1349 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1350 | size_t offs) |
1351 | { | |
85db90e7 | 1352 | int ret; |
cf1d6c76 | 1353 | |
0cf2f763 | 1354 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
0c748e95 | 1355 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1356 | if (ret) { |
1357 | mlog_errno(ret); | |
85db90e7 | 1358 | goto out; |
cf1d6c76 TY |
1359 | } |
1360 | ||
1361 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
1362 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1363 | if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1364 | ocfs2_xattr_set_local(xs->here, 1); | |
1365 | else | |
1366 | ocfs2_xattr_set_local(xs->here, 0); | |
1367 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1368 | ||
0c748e95 | 1369 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1370 | if (ret < 0) |
1371 | mlog_errno(ret); | |
cf1d6c76 TY |
1372 | out: |
1373 | return ret; | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * ocfs2_xattr_set_value_outside() | |
1378 | * | |
1379 | * Set large size value in B tree. | |
1380 | */ | |
1381 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1382 | struct ocfs2_xattr_info *xi, | |
1383 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1384 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1385 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1386 | size_t offs) |
1387 | { | |
1388 | size_t name_len = strlen(xi->name); | |
1389 | void *val = xs->base + offs; | |
1390 | struct ocfs2_xattr_value_root *xv = NULL; | |
1391 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1392 | int ret = 0; | |
1393 | ||
1394 | memset(val, 0, size); | |
1395 | memcpy(val, xi->name, name_len); | |
1396 | xv = (struct ocfs2_xattr_value_root *) | |
1397 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1398 | xv->xr_clusters = 0; | |
1399 | xv->xr_last_eb_blk = 0; | |
1400 | xv->xr_list.l_tree_depth = 0; | |
1401 | xv->xr_list.l_count = cpu_to_le16(1); | |
1402 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1403 | vb->vb_xv = xv; |
cf1d6c76 | 1404 | |
512620f4 | 1405 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->value_len, ctxt); |
cf1d6c76 TY |
1406 | if (ret < 0) { |
1407 | mlog_errno(ret); | |
1408 | return ret; | |
1409 | } | |
512620f4 | 1410 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1411 | if (ret < 0) { |
1412 | mlog_errno(ret); | |
1413 | return ret; | |
1414 | } | |
492a8a33 | 1415 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb, |
85db90e7 | 1416 | xi->value, xi->value_len); |
cf1d6c76 TY |
1417 | if (ret < 0) |
1418 | mlog_errno(ret); | |
1419 | ||
1420 | return ret; | |
1421 | } | |
1422 | ||
1423 | /* | |
1424 | * ocfs2_xattr_set_entry_local() | |
1425 | * | |
1426 | * Set, replace or remove extended attribute in local. | |
1427 | */ | |
1428 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1429 | struct ocfs2_xattr_info *xi, | |
1430 | struct ocfs2_xattr_search *xs, | |
1431 | struct ocfs2_xattr_entry *last, | |
1432 | size_t min_offs) | |
1433 | { | |
1434 | size_t name_len = strlen(xi->name); | |
1435 | int i; | |
1436 | ||
1437 | if (xi->value && xs->not_found) { | |
1438 | /* Insert the new xattr entry. */ | |
1439 | le16_add_cpu(&xs->header->xh_count, 1); | |
1440 | ocfs2_xattr_set_type(last, xi->name_index); | |
1441 | ocfs2_xattr_set_local(last, 1); | |
1442 | last->xe_name_len = name_len; | |
1443 | } else { | |
1444 | void *first_val; | |
1445 | void *val; | |
1446 | size_t offs, size; | |
1447 | ||
1448 | first_val = xs->base + min_offs; | |
1449 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1450 | val = xs->base + offs; | |
1451 | ||
1452 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1453 | OCFS2_XATTR_INLINE_SIZE) | |
1454 | size = OCFS2_XATTR_SIZE(name_len) + | |
1455 | OCFS2_XATTR_ROOT_SIZE; | |
1456 | else | |
1457 | size = OCFS2_XATTR_SIZE(name_len) + | |
1458 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1459 | ||
1460 | if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1461 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1462 | /* The old and the new value have the | |
1463 | same size. Just replace the value. */ | |
1464 | ocfs2_xattr_set_local(xs->here, 1); | |
1465 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1466 | /* Clear value bytes. */ | |
1467 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1468 | 0, | |
1469 | OCFS2_XATTR_SIZE(xi->value_len)); | |
1470 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1471 | xi->value, | |
1472 | xi->value_len); | |
1473 | return; | |
1474 | } | |
1475 | /* Remove the old name+value. */ | |
1476 | memmove(first_val + size, first_val, val - first_val); | |
1477 | memset(first_val, 0, size); | |
1478 | xs->here->xe_name_hash = 0; | |
1479 | xs->here->xe_name_offset = 0; | |
1480 | ocfs2_xattr_set_local(xs->here, 1); | |
1481 | xs->here->xe_value_size = 0; | |
1482 | ||
1483 | min_offs += size; | |
1484 | ||
1485 | /* Adjust all value offsets. */ | |
1486 | last = xs->header->xh_entries; | |
1487 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1488 | size_t o = le16_to_cpu(last->xe_name_offset); | |
1489 | ||
1490 | if (o < offs) | |
1491 | last->xe_name_offset = cpu_to_le16(o + size); | |
1492 | last += 1; | |
1493 | } | |
1494 | ||
1495 | if (!xi->value) { | |
1496 | /* Remove the old entry. */ | |
1497 | last -= 1; | |
1498 | memmove(xs->here, xs->here + 1, | |
1499 | (void *)last - (void *)xs->here); | |
1500 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1501 | le16_add_cpu(&xs->header->xh_count, -1); | |
1502 | } | |
1503 | } | |
1504 | if (xi->value) { | |
1505 | /* Insert the new name+value. */ | |
1506 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1507 | OCFS2_XATTR_SIZE(xi->value_len); | |
1508 | void *val = xs->base + min_offs - size; | |
1509 | ||
1510 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1511 | memset(val, 0, size); | |
1512 | memcpy(val, xi->name, name_len); | |
1513 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1514 | xi->value, | |
1515 | xi->value_len); | |
1516 | xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1517 | ocfs2_xattr_set_local(xs->here, 1); | |
1518 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1519 | } | |
1520 | ||
1521 | return; | |
1522 | } | |
1523 | ||
1524 | /* | |
1525 | * ocfs2_xattr_set_entry() | |
1526 | * | |
1527 | * Set extended attribute entry into inode or block. | |
1528 | * | |
1529 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1530 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1531 | * then set value in B tree with set_value_outside(). | |
1532 | */ | |
1533 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1534 | struct ocfs2_xattr_info *xi, | |
1535 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1536 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1537 | int flag) |
1538 | { | |
1539 | struct ocfs2_xattr_entry *last; | |
1540 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1541 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1542 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1543 | size_t size_l = 0; | |
85db90e7 | 1544 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1545 | int free, i, ret; |
1546 | struct ocfs2_xattr_info xi_l = { | |
1547 | .name_index = xi->name_index, | |
1548 | .name = xi->name, | |
1549 | .value = xi->value, | |
1550 | .value_len = xi->value_len, | |
1551 | }; | |
512620f4 JB |
1552 | struct ocfs2_xattr_value_buf vb = { |
1553 | .vb_bh = xs->xattr_bh, | |
1554 | .vb_access = ocfs2_journal_access_di, | |
1555 | }; | |
1556 | ||
1557 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1558 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1559 | vb.vb_access = ocfs2_journal_access_xb; | |
1560 | } else | |
1561 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1562 | |
1563 | /* Compute min_offs, last and free space. */ | |
1564 | last = xs->header->xh_entries; | |
1565 | ||
1566 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1567 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1568 | if (offs < min_offs) | |
1569 | min_offs = offs; | |
1570 | last += 1; | |
1571 | } | |
1572 | ||
4442f518 | 1573 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1574 | if (free < 0) |
b37c4d84 | 1575 | return -EIO; |
cf1d6c76 TY |
1576 | |
1577 | if (!xs->not_found) { | |
1578 | size_t size = 0; | |
1579 | if (ocfs2_xattr_is_local(xs->here)) | |
1580 | size = OCFS2_XATTR_SIZE(name_len) + | |
1581 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1582 | else | |
1583 | size = OCFS2_XATTR_SIZE(name_len) + | |
1584 | OCFS2_XATTR_ROOT_SIZE; | |
1585 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1586 | } | |
1587 | /* Check free space in inode or block */ | |
1588 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1589 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1590 | OCFS2_XATTR_SIZE(name_len) + | |
1591 | OCFS2_XATTR_ROOT_SIZE) { | |
1592 | ret = -ENOSPC; | |
1593 | goto out; | |
1594 | } | |
1595 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1596 | xi_l.value = (void *)&def_xv; | |
1597 | xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1598 | } else if (xi->value) { | |
1599 | if (free < sizeof(struct ocfs2_xattr_entry) + | |
1600 | OCFS2_XATTR_SIZE(name_len) + | |
1601 | OCFS2_XATTR_SIZE(xi->value_len)) { | |
1602 | ret = -ENOSPC; | |
1603 | goto out; | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | if (!xs->not_found) { | |
1608 | /* For existing extended attribute */ | |
1609 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1610 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1611 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1612 | void *val = xs->base + offs; | |
1613 | ||
1614 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1615 | /* Replace existing local xattr with tree root */ | |
1616 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1617 | ctxt, &vb, offs); |
cf1d6c76 TY |
1618 | if (ret < 0) |
1619 | mlog_errno(ret); | |
1620 | goto out; | |
1621 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1622 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1623 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1624 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 TY |
1625 | |
1626 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1627 | /* | |
1628 | * If new value need set outside also, | |
1629 | * first truncate old value to new value, | |
1630 | * then set new value with set_value_outside(). | |
1631 | */ | |
1632 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1633 | &vb, |
78f30c31 TM |
1634 | xi->value_len, |
1635 | ctxt); | |
cf1d6c76 TY |
1636 | if (ret < 0) { |
1637 | mlog_errno(ret); | |
1638 | goto out; | |
1639 | } | |
1640 | ||
85db90e7 TM |
1641 | ret = ocfs2_xattr_update_entry(inode, |
1642 | handle, | |
1643 | xi, | |
1644 | xs, | |
0c748e95 | 1645 | &vb, |
85db90e7 | 1646 | offs); |
cf1d6c76 TY |
1647 | if (ret < 0) { |
1648 | mlog_errno(ret); | |
1649 | goto out; | |
1650 | } | |
1651 | ||
85db90e7 TM |
1652 | ret = __ocfs2_xattr_set_value_outside(inode, |
1653 | handle, | |
492a8a33 | 1654 | &vb, |
85db90e7 TM |
1655 | xi->value, |
1656 | xi->value_len); | |
cf1d6c76 TY |
1657 | if (ret < 0) |
1658 | mlog_errno(ret); | |
1659 | goto out; | |
1660 | } else { | |
1661 | /* | |
1662 | * If new value need set in local, | |
1663 | * just trucate old value to zero. | |
1664 | */ | |
1665 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1666 | &vb, |
85db90e7 TM |
1667 | 0, |
1668 | ctxt); | |
cf1d6c76 TY |
1669 | if (ret < 0) |
1670 | mlog_errno(ret); | |
1671 | } | |
1672 | } | |
1673 | } | |
1674 | ||
0cf2f763 | 1675 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh, |
512620f4 | 1676 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1677 | if (ret) { |
1678 | mlog_errno(ret); | |
85db90e7 | 1679 | goto out; |
cf1d6c76 TY |
1680 | } |
1681 | ||
1682 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
0cf2f763 | 1683 | ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh, |
512620f4 | 1684 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1685 | if (ret) { |
1686 | mlog_errno(ret); | |
85db90e7 | 1687 | goto out; |
cf1d6c76 TY |
1688 | } |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Set value in local, include set tree root in local. | |
1693 | * This is the first step for value size >INLINE_SIZE. | |
1694 | */ | |
1695 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1696 | ||
1697 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1698 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1699 | if (ret < 0) { | |
1700 | mlog_errno(ret); | |
85db90e7 | 1701 | goto out; |
cf1d6c76 TY |
1702 | } |
1703 | } | |
1704 | ||
1705 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1706 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1707 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1708 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1709 | ||
1710 | /* | |
1711 | * Adjust extent record count or inline data size | |
1712 | * to reserve space for extended attribute. | |
1713 | */ | |
1714 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1715 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1716 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1717 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1718 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1719 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1720 | sizeof(struct ocfs2_extent_rec))); | |
1721 | } | |
1722 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1723 | } | |
1724 | /* Update xattr flag */ | |
1725 | spin_lock(&oi->ip_lock); | |
1726 | oi->ip_dyn_features |= flag; | |
1727 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1728 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1729 | |
1730 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1731 | if (ret < 0) | |
1732 | mlog_errno(ret); | |
1733 | ||
cf1d6c76 TY |
1734 | if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
1735 | /* | |
1736 | * Set value outside in B tree. | |
1737 | * This is the second step for value size > INLINE_SIZE. | |
1738 | */ | |
1739 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1740 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1741 | &vb, offs); | |
cf1d6c76 TY |
1742 | if (ret < 0) { |
1743 | int ret2; | |
1744 | ||
1745 | mlog_errno(ret); | |
1746 | /* | |
1747 | * If set value outside failed, we have to clean | |
1748 | * the junk tree root we have already set in local. | |
1749 | */ | |
85db90e7 | 1750 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1751 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1752 | if (ret2 < 0) |
1753 | mlog_errno(ret2); | |
1754 | } | |
1755 | } | |
1756 | out: | |
1757 | return ret; | |
cf1d6c76 TY |
1758 | } |
1759 | ||
ce9c5a54 TM |
1760 | /* |
1761 | * In xattr remove, if it is stored outside and refcounted, we may have | |
1762 | * the chance to split the refcount tree. So need the allocators. | |
1763 | */ | |
1764 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
1765 | struct ocfs2_xattr_value_root *xv, | |
1766 | struct ocfs2_caching_info *ref_ci, | |
1767 | struct buffer_head *ref_root_bh, | |
1768 | struct ocfs2_alloc_context **meta_ac, | |
1769 | int *ref_credits) | |
1770 | { | |
1771 | int ret, meta_add = 0; | |
1772 | u32 p_cluster, num_clusters; | |
1773 | unsigned int ext_flags; | |
1774 | ||
1775 | *ref_credits = 0; | |
1776 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
1777 | &num_clusters, | |
1778 | &xv->xr_list, | |
1779 | &ext_flags); | |
1780 | if (ret) { | |
1781 | mlog_errno(ret); | |
1782 | goto out; | |
1783 | } | |
1784 | ||
1785 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
1786 | goto out; | |
1787 | ||
1788 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
1789 | ref_root_bh, xv, | |
1790 | &meta_add, ref_credits); | |
1791 | if (ret) { | |
1792 | mlog_errno(ret); | |
1793 | goto out; | |
1794 | } | |
1795 | ||
1796 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
1797 | meta_add, meta_ac); | |
1798 | if (ret) | |
1799 | mlog_errno(ret); | |
1800 | ||
1801 | out: | |
1802 | return ret; | |
1803 | } | |
1804 | ||
cf1d6c76 | 1805 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 1806 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
1807 | struct ocfs2_xattr_header *header, |
1808 | struct ocfs2_caching_info *ref_ci, | |
1809 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 1810 | { |
ce9c5a54 | 1811 | int ret = 0, i, ref_credits; |
78f30c31 TM |
1812 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
1813 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 1814 | void *val; |
78f30c31 TM |
1815 | |
1816 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
1817 | |
1818 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1819 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1820 | ||
ce9c5a54 TM |
1821 | if (ocfs2_xattr_is_local(entry)) |
1822 | continue; | |
cf1d6c76 | 1823 | |
ce9c5a54 TM |
1824 | val = (void *)header + |
1825 | le16_to_cpu(entry->xe_name_offset); | |
1826 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
1827 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1828 | ||
1829 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
1830 | ref_ci, ref_root_bh, | |
1831 | &ctxt.meta_ac, | |
1832 | &ref_credits); | |
1833 | ||
1834 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
1835 | ocfs2_remove_extent_credits(osb->sb)); | |
1836 | if (IS_ERR(ctxt.handle)) { | |
1837 | ret = PTR_ERR(ctxt.handle); | |
1838 | mlog_errno(ret); | |
1839 | break; | |
1840 | } | |
1841 | ||
1842 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
1843 | if (ret < 0) { | |
1844 | mlog_errno(ret); | |
1845 | break; | |
1846 | } | |
1847 | ||
1848 | ocfs2_commit_trans(osb, ctxt.handle); | |
1849 | if (ctxt.meta_ac) { | |
1850 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
1851 | ctxt.meta_ac = NULL; | |
cf1d6c76 TY |
1852 | } |
1853 | } | |
1854 | ||
ce9c5a54 TM |
1855 | if (ctxt.meta_ac) |
1856 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
1857 | ocfs2_schedule_truncate_log_flush(osb, 1); |
1858 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
1859 | return ret; |
1860 | } | |
1861 | ||
1862 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
1863 | struct buffer_head *di_bh, |
1864 | struct ocfs2_caching_info *ref_ci, | |
1865 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
1866 | { |
1867 | ||
1868 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1869 | struct ocfs2_xattr_header *header; | |
1870 | int ret; | |
4311901d JB |
1871 | struct ocfs2_xattr_value_buf vb = { |
1872 | .vb_bh = di_bh, | |
1873 | .vb_access = ocfs2_journal_access_di, | |
1874 | }; | |
cf1d6c76 TY |
1875 | |
1876 | header = (struct ocfs2_xattr_header *) | |
1877 | ((void *)di + inode->i_sb->s_blocksize - | |
1878 | le16_to_cpu(di->i_xattr_inline_size)); | |
1879 | ||
ce9c5a54 TM |
1880 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
1881 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
1882 | |
1883 | return ret; | |
1884 | } | |
1885 | ||
ce9c5a54 TM |
1886 | struct ocfs2_rm_xattr_bucket_para { |
1887 | struct ocfs2_caching_info *ref_ci; | |
1888 | struct buffer_head *ref_root_bh; | |
1889 | }; | |
1890 | ||
cf1d6c76 | 1891 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
1892 | struct buffer_head *blk_bh, |
1893 | struct ocfs2_caching_info *ref_ci, | |
1894 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
1895 | { |
1896 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 1897 | int ret = 0; |
4311901d JB |
1898 | struct ocfs2_xattr_value_buf vb = { |
1899 | .vb_bh = blk_bh, | |
1900 | .vb_access = ocfs2_journal_access_xb, | |
1901 | }; | |
ce9c5a54 TM |
1902 | struct ocfs2_rm_xattr_bucket_para args = { |
1903 | .ref_ci = ref_ci, | |
1904 | .ref_root_bh = ref_root_bh, | |
1905 | }; | |
cf1d6c76 TY |
1906 | |
1907 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
1908 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1909 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
1910 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
1911 | ref_ci, ref_root_bh); | |
a3944256 | 1912 | } else |
47bca495 TM |
1913 | ret = ocfs2_iterate_xattr_index_block(inode, |
1914 | blk_bh, | |
1915 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 1916 | &args); |
cf1d6c76 TY |
1917 | |
1918 | return ret; | |
1919 | } | |
1920 | ||
08413899 | 1921 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
1922 | u64 block, |
1923 | struct ocfs2_caching_info *ref_ci, | |
1924 | struct buffer_head *ref_root_bh) | |
08413899 TM |
1925 | { |
1926 | struct inode *xb_alloc_inode; | |
1927 | struct buffer_head *xb_alloc_bh = NULL; | |
1928 | struct buffer_head *blk_bh = NULL; | |
1929 | struct ocfs2_xattr_block *xb; | |
1930 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1931 | handle_t *handle; | |
1932 | int ret = 0; | |
1933 | u64 blk, bg_blkno; | |
1934 | u16 bit; | |
1935 | ||
4ae1d69b | 1936 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
1937 | if (ret < 0) { |
1938 | mlog_errno(ret); | |
1939 | goto out; | |
1940 | } | |
1941 | ||
ce9c5a54 | 1942 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
1943 | if (ret < 0) { |
1944 | mlog_errno(ret); | |
1945 | goto out; | |
1946 | } | |
1947 | ||
4ae1d69b | 1948 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
1949 | blk = le64_to_cpu(xb->xb_blkno); |
1950 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1951 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1952 | ||
1953 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1954 | EXTENT_ALLOC_SYSTEM_INODE, | |
1955 | le16_to_cpu(xb->xb_suballoc_slot)); | |
1956 | if (!xb_alloc_inode) { | |
1957 | ret = -ENOMEM; | |
1958 | mlog_errno(ret); | |
1959 | goto out; | |
1960 | } | |
1961 | mutex_lock(&xb_alloc_inode->i_mutex); | |
1962 | ||
1963 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1964 | if (ret < 0) { | |
1965 | mlog_errno(ret); | |
1966 | goto out_mutex; | |
1967 | } | |
1968 | ||
1969 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
1970 | if (IS_ERR(handle)) { | |
1971 | ret = PTR_ERR(handle); | |
1972 | mlog_errno(ret); | |
1973 | goto out_unlock; | |
1974 | } | |
1975 | ||
1976 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1977 | bit, bg_blkno, 1); | |
1978 | if (ret < 0) | |
1979 | mlog_errno(ret); | |
1980 | ||
1981 | ocfs2_commit_trans(osb, handle); | |
1982 | out_unlock: | |
1983 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1984 | brelse(xb_alloc_bh); | |
1985 | out_mutex: | |
1986 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
1987 | iput(xb_alloc_inode); | |
1988 | out: | |
1989 | brelse(blk_bh); | |
1990 | return ret; | |
1991 | } | |
1992 | ||
cf1d6c76 TY |
1993 | /* |
1994 | * ocfs2_xattr_remove() | |
1995 | * | |
1996 | * Free extended attribute resources associated with this inode. | |
1997 | */ | |
1998 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1999 | { | |
cf1d6c76 TY |
2000 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2001 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2002 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2003 | struct buffer_head *ref_root_bh = NULL; | |
2004 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2005 | handle_t *handle; |
2006 | int ret; | |
2007 | ||
8154da3d TY |
2008 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2009 | return 0; | |
2010 | ||
cf1d6c76 TY |
2011 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2012 | return 0; | |
2013 | ||
ce9c5a54 TM |
2014 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
2015 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), | |
2016 | le64_to_cpu(di->i_refcount_loc), | |
2017 | 1, &ref_tree, &ref_root_bh); | |
2018 | if (ret) { | |
2019 | mlog_errno(ret); | |
2020 | goto out; | |
2021 | } | |
2022 | ref_ci = &ref_tree->rf_ci; | |
2023 | ||
2024 | } | |
2025 | ||
cf1d6c76 | 2026 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2027 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2028 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2029 | if (ret < 0) { |
2030 | mlog_errno(ret); | |
2031 | goto out; | |
2032 | } | |
2033 | } | |
cf1d6c76 | 2034 | |
08413899 TM |
2035 | if (di->i_xattr_loc) { |
2036 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2037 | le64_to_cpu(di->i_xattr_loc), |
2038 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2039 | if (ret < 0) { |
2040 | mlog_errno(ret); | |
2041 | goto out; | |
2042 | } | |
2043 | } | |
2044 | ||
2045 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2046 | OCFS2_INODE_UPDATE_CREDITS); | |
2047 | if (IS_ERR(handle)) { | |
2048 | ret = PTR_ERR(handle); | |
2049 | mlog_errno(ret); | |
2050 | goto out; | |
2051 | } | |
0cf2f763 | 2052 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2053 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2054 | if (ret) { |
2055 | mlog_errno(ret); | |
2056 | goto out_commit; | |
2057 | } | |
2058 | ||
08413899 | 2059 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2060 | |
2061 | spin_lock(&oi->ip_lock); | |
2062 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2063 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2064 | spin_unlock(&oi->ip_lock); | |
2065 | ||
2066 | ret = ocfs2_journal_dirty(handle, di_bh); | |
2067 | if (ret < 0) | |
2068 | mlog_errno(ret); | |
2069 | out_commit: | |
2070 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2071 | out: | |
ce9c5a54 TM |
2072 | if (ref_tree) |
2073 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2074 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2075 | return ret; |
2076 | } | |
2077 | ||
2078 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2079 | struct ocfs2_dinode *di) | |
2080 | { | |
2081 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2082 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2083 | int free; | |
2084 | ||
2085 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2086 | return 0; | |
2087 | ||
2088 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2089 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2090 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2091 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2092 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2093 | le64_to_cpu(di->i_size); | |
2094 | } else { | |
2095 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2096 | free = (le16_to_cpu(el->l_count) - | |
2097 | le16_to_cpu(el->l_next_free_rec)) * | |
2098 | sizeof(struct ocfs2_extent_rec); | |
2099 | } | |
2100 | if (free >= xattrsize) | |
2101 | return 1; | |
2102 | ||
2103 | return 0; | |
2104 | } | |
2105 | ||
2106 | /* | |
2107 | * ocfs2_xattr_ibody_find() | |
2108 | * | |
2109 | * Find extended attribute in inode block and | |
2110 | * fill search info into struct ocfs2_xattr_search. | |
2111 | */ | |
2112 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2113 | int name_index, | |
2114 | const char *name, | |
2115 | struct ocfs2_xattr_search *xs) | |
2116 | { | |
2117 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2118 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2119 | int ret; | |
2120 | int has_space = 0; | |
2121 | ||
2122 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2123 | return 0; | |
2124 | ||
2125 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2126 | down_read(&oi->ip_alloc_sem); | |
2127 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2128 | up_read(&oi->ip_alloc_sem); | |
2129 | if (!has_space) | |
2130 | return 0; | |
2131 | } | |
2132 | ||
2133 | xs->xattr_bh = xs->inode_bh; | |
2134 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2135 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2136 | xs->header = (struct ocfs2_xattr_header *) | |
2137 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2138 | else | |
2139 | xs->header = (struct ocfs2_xattr_header *) | |
2140 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2141 | xs->base = (void *)xs->header; | |
2142 | xs->here = xs->header->xh_entries; | |
2143 | ||
2144 | /* Find the named attribute. */ | |
2145 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2146 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2147 | if (ret && ret != -ENODATA) | |
2148 | return ret; | |
2149 | xs->not_found = ret; | |
2150 | } | |
2151 | ||
2152 | return 0; | |
2153 | } | |
2154 | ||
2155 | /* | |
2156 | * ocfs2_xattr_ibody_set() | |
2157 | * | |
2158 | * Set, replace or remove an extended attribute into inode block. | |
2159 | * | |
2160 | */ | |
2161 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2162 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2163 | struct ocfs2_xattr_search *xs, |
2164 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2165 | { |
2166 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2167 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2168 | int ret; | |
2169 | ||
2170 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2171 | return -ENOSPC; | |
2172 | ||
2173 | down_write(&oi->ip_alloc_sem); | |
2174 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2175 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2176 | ret = -ENOSPC; | |
2177 | goto out; | |
2178 | } | |
2179 | } | |
2180 | ||
78f30c31 | 2181 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2182 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2183 | out: | |
2184 | up_write(&oi->ip_alloc_sem); | |
2185 | ||
2186 | return ret; | |
2187 | } | |
2188 | ||
2189 | /* | |
2190 | * ocfs2_xattr_block_find() | |
2191 | * | |
2192 | * Find extended attribute in external block and | |
2193 | * fill search info into struct ocfs2_xattr_search. | |
2194 | */ | |
2195 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2196 | int name_index, | |
2197 | const char *name, | |
2198 | struct ocfs2_xattr_search *xs) | |
2199 | { | |
2200 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2201 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2202 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2203 | int ret = 0; |
2204 | ||
2205 | if (!di->i_xattr_loc) | |
2206 | return ret; | |
2207 | ||
4ae1d69b JB |
2208 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2209 | &blk_bh); | |
cf1d6c76 TY |
2210 | if (ret < 0) { |
2211 | mlog_errno(ret); | |
2212 | return ret; | |
2213 | } | |
f6087fb7 | 2214 | |
cf1d6c76 | 2215 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2216 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2217 | |
2218 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2219 | xs->header = &xb->xb_attrs.xb_header; | |
2220 | xs->base = (void *)xs->header; | |
2221 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2222 | xs->here = xs->header->xh_entries; | |
2223 | ||
2224 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2225 | } else | |
2226 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2227 | name_index, | |
2228 | name, xs); | |
cf1d6c76 | 2229 | |
cf1d6c76 TY |
2230 | if (ret && ret != -ENODATA) { |
2231 | xs->xattr_bh = NULL; | |
2232 | goto cleanup; | |
2233 | } | |
2234 | xs->not_found = ret; | |
2235 | return 0; | |
cf1d6c76 TY |
2236 | cleanup: |
2237 | brelse(blk_bh); | |
2238 | ||
2239 | return ret; | |
2240 | } | |
2241 | ||
5aea1f0e TM |
2242 | static int ocfs2_create_xattr_block(handle_t *handle, |
2243 | struct inode *inode, | |
2244 | struct buffer_head *inode_bh, | |
2245 | struct ocfs2_alloc_context *meta_ac, | |
a7fe7a3a TM |
2246 | struct buffer_head **ret_bh, |
2247 | int indexed) | |
5aea1f0e TM |
2248 | { |
2249 | int ret; | |
2250 | u16 suballoc_bit_start; | |
2251 | u32 num_got; | |
2252 | u64 first_blkno; | |
2253 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; | |
2254 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2255 | struct buffer_head *new_bh = NULL; | |
2256 | struct ocfs2_xattr_block *xblk; | |
2257 | ||
2258 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), inode_bh, | |
2259 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2260 | if (ret < 0) { | |
2261 | mlog_errno(ret); | |
2262 | goto end; | |
2263 | } | |
2264 | ||
2265 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
2266 | &suballoc_bit_start, &num_got, | |
2267 | &first_blkno); | |
2268 | if (ret < 0) { | |
2269 | mlog_errno(ret); | |
2270 | goto end; | |
2271 | } | |
2272 | ||
2273 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2274 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); | |
2275 | ||
2276 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), | |
2277 | new_bh, | |
2278 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2279 | if (ret < 0) { | |
2280 | mlog_errno(ret); | |
2281 | goto end; | |
2282 | } | |
2283 | ||
2284 | /* Initialize ocfs2_xattr_block */ | |
2285 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2286 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2287 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
2288 | xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
2289 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
2290 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2291 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2292 | ||
a7fe7a3a TM |
2293 | if (indexed) { |
2294 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2295 | xr->xt_clusters = cpu_to_le32(1); | |
2296 | xr->xt_last_eb_blk = 0; | |
2297 | xr->xt_list.l_tree_depth = 0; | |
2298 | xr->xt_list.l_count = cpu_to_le16( | |
2299 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2300 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2301 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2302 | } | |
2303 | ||
5aea1f0e TM |
2304 | ret = ocfs2_journal_dirty(handle, new_bh); |
2305 | if (ret < 0) { | |
2306 | mlog_errno(ret); | |
2307 | goto end; | |
2308 | } | |
2309 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
2310 | ocfs2_journal_dirty(handle, inode_bh); | |
2311 | ||
2312 | *ret_bh = new_bh; | |
2313 | new_bh = NULL; | |
2314 | ||
2315 | end: | |
2316 | brelse(new_bh); | |
2317 | return ret; | |
2318 | } | |
2319 | ||
cf1d6c76 TY |
2320 | /* |
2321 | * ocfs2_xattr_block_set() | |
2322 | * | |
2323 | * Set, replace or remove an extended attribute into external block. | |
2324 | * | |
2325 | */ | |
2326 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2327 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2328 | struct ocfs2_xattr_search *xs, |
2329 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2330 | { |
2331 | struct buffer_head *new_bh = NULL; | |
85db90e7 | 2332 | handle_t *handle = ctxt->handle; |
cf1d6c76 | 2333 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 TY |
2334 | int ret; |
2335 | ||
2336 | if (!xs->xattr_bh) { | |
5aea1f0e | 2337 | ret = ocfs2_create_xattr_block(handle, inode, xs->inode_bh, |
a7fe7a3a | 2338 | ctxt->meta_ac, &new_bh, 0); |
5aea1f0e | 2339 | if (ret) { |
cf1d6c76 | 2340 | mlog_errno(ret); |
85db90e7 | 2341 | goto end; |
cf1d6c76 TY |
2342 | } |
2343 | ||
cf1d6c76 | 2344 | xs->xattr_bh = new_bh; |
5aea1f0e | 2345 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2346 | xs->header = &xblk->xb_attrs.xb_header; |
2347 | xs->base = (void *)xs->header; | |
2348 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2349 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2350 | } else |
2351 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2352 | ||
2353 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2354 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2355 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2356 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2357 | if (!ret || ret != -ENOSPC) |
2358 | goto end; | |
2359 | ||
78f30c31 | 2360 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2361 | if (ret) |
2362 | goto end; | |
cf1d6c76 TY |
2363 | } |
2364 | ||
78f30c31 | 2365 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2366 | |
2367 | end: | |
cf1d6c76 TY |
2368 | |
2369 | return ret; | |
2370 | } | |
2371 | ||
78f30c31 TM |
2372 | /* Check whether the new xattr can be inserted into the inode. */ |
2373 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2374 | struct ocfs2_xattr_info *xi, | |
2375 | struct ocfs2_xattr_search *xs) | |
2376 | { | |
2377 | u64 value_size; | |
2378 | struct ocfs2_xattr_entry *last; | |
2379 | int free, i; | |
2380 | size_t min_offs = xs->end - xs->base; | |
2381 | ||
2382 | if (!xs->header) | |
2383 | return 0; | |
2384 | ||
2385 | last = xs->header->xh_entries; | |
2386 | ||
2387 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2388 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2389 | if (offs < min_offs) | |
2390 | min_offs = offs; | |
2391 | last += 1; | |
2392 | } | |
2393 | ||
4442f518 | 2394 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2395 | if (free < 0) |
2396 | return 0; | |
2397 | ||
2398 | BUG_ON(!xs->not_found); | |
2399 | ||
2400 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2401 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
2402 | else | |
2403 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
2404 | ||
2405 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
2406 | OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) | |
2407 | return 1; | |
2408 | ||
2409 | return 0; | |
2410 | } | |
2411 | ||
2412 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2413 | struct ocfs2_dinode *di, | |
2414 | struct ocfs2_xattr_info *xi, | |
2415 | struct ocfs2_xattr_search *xis, | |
2416 | struct ocfs2_xattr_search *xbs, | |
2417 | int *clusters_need, | |
85db90e7 TM |
2418 | int *meta_need, |
2419 | int *credits_need) | |
78f30c31 TM |
2420 | { |
2421 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2422 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2423 | struct buffer_head *bh = NULL; |
2424 | struct ocfs2_xattr_block *xb = NULL; | |
2425 | struct ocfs2_xattr_entry *xe = NULL; | |
2426 | struct ocfs2_xattr_value_root *xv = NULL; | |
2427 | char *base = NULL; | |
2428 | int name_offset, name_len = 0; | |
2429 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2430 | xi->value_len); | |
2431 | u64 value_size; | |
2432 | ||
71d548a6 TM |
2433 | /* |
2434 | * Calculate the clusters we need to write. | |
2435 | * No matter whether we replace an old one or add a new one, | |
2436 | * we need this for writing. | |
2437 | */ | |
2438 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
2439 | credits += new_clusters * | |
2440 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2441 | ||
78f30c31 | 2442 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2443 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2444 | ||
2445 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
78f30c31 | 2446 | clusters_add += new_clusters; |
85db90e7 TM |
2447 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2448 | &def_xv.xv.xr_list, | |
2449 | new_clusters); | |
2450 | } | |
78f30c31 TM |
2451 | |
2452 | goto meta_guess; | |
2453 | } | |
2454 | ||
2455 | if (!xis->not_found) { | |
2456 | xe = xis->here; | |
2457 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2458 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2459 | base = xis->base; | |
85db90e7 | 2460 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2461 | } else { |
970e4936 | 2462 | int i, block_off = 0; |
78f30c31 TM |
2463 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2464 | xe = xbs->here; | |
2465 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2466 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2467 | i = xbs->here - xbs->header->xh_entries; | |
2468 | old_in_xb = 1; | |
2469 | ||
2470 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 2471 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
2472 | bucket_xh(xbs->bucket), |
2473 | i, &block_off, | |
2474 | &name_offset); | |
2475 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2476 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2477 | } else { | |
78f30c31 | 2478 | base = xbs->base; |
85db90e7 TM |
2479 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2480 | } | |
2481 | } | |
2482 | ||
2483 | /* | |
2484 | * delete a xattr doesn't need metadata and cluster allocation. | |
2485 | * so just calculate the credits and return. | |
2486 | * | |
2487 | * The credits for removing the value tree will be extended | |
2488 | * by ocfs2_remove_extent itself. | |
2489 | */ | |
2490 | if (!xi->value) { | |
2491 | if (!ocfs2_xattr_is_local(xe)) | |
a90714c1 | 2492 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2493 | |
2494 | goto out; | |
78f30c31 TM |
2495 | } |
2496 | ||
2497 | /* do cluster allocation guess first. */ | |
2498 | value_size = le64_to_cpu(xe->xe_value_size); | |
2499 | ||
2500 | if (old_in_xb) { | |
2501 | /* | |
2502 | * In xattr set, we always try to set the xe in inode first, | |
2503 | * so if it can be inserted into inode successfully, the old | |
2504 | * one will be removed from the xattr block, and this xattr | |
2505 | * will be inserted into inode as a new xattr in inode. | |
2506 | */ | |
2507 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2508 | clusters_add += new_clusters; | |
a90714c1 | 2509 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2510 | OCFS2_INODE_UPDATE_CREDITS; |
2511 | if (!ocfs2_xattr_is_local(xe)) | |
2512 | credits += ocfs2_calc_extend_credits( | |
2513 | inode->i_sb, | |
2514 | &def_xv.xv.xr_list, | |
2515 | new_clusters); | |
78f30c31 TM |
2516 | goto out; |
2517 | } | |
2518 | } | |
2519 | ||
2520 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
2521 | /* the new values will be stored outside. */ | |
2522 | u32 old_clusters = 0; | |
2523 | ||
2524 | if (!ocfs2_xattr_is_local(xe)) { | |
2525 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2526 | value_size); | |
2527 | xv = (struct ocfs2_xattr_value_root *) | |
2528 | (base + name_offset + name_len); | |
97aff52a | 2529 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2530 | } else |
2531 | xv = &def_xv.xv; | |
2532 | ||
85db90e7 | 2533 | if (old_clusters >= new_clusters) { |
a90714c1 | 2534 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2535 | goto out; |
85db90e7 | 2536 | } else { |
78f30c31 TM |
2537 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2538 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2539 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2540 | &xv->xr_list, | |
2541 | new_clusters - | |
2542 | old_clusters); | |
97aff52a TM |
2543 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2544 | goto out; | |
78f30c31 TM |
2545 | } |
2546 | } else { | |
2547 | /* | |
2548 | * Now the new value will be stored inside. So if the new | |
2549 | * value is smaller than the size of value root or the old | |
2550 | * value, we don't need any allocation, otherwise we have | |
2551 | * to guess metadata allocation. | |
2552 | */ | |
2553 | if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || | |
2554 | (!ocfs2_xattr_is_local(xe) && | |
2555 | OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) | |
2556 | goto out; | |
2557 | } | |
2558 | ||
2559 | meta_guess: | |
2560 | /* calculate metadata allocation. */ | |
2561 | if (di->i_xattr_loc) { | |
2562 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2563 | ret = ocfs2_read_xattr_block(inode, |
2564 | le64_to_cpu(di->i_xattr_loc), | |
2565 | &bh); | |
78f30c31 TM |
2566 | if (ret) { |
2567 | mlog_errno(ret); | |
2568 | goto out; | |
2569 | } | |
2570 | ||
2571 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2572 | } else | |
2573 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2574 | ||
90cb546c TM |
2575 | /* |
2576 | * If there is already an xattr tree, good, we can calculate | |
2577 | * like other b-trees. Otherwise we may have the chance of | |
2578 | * create a tree, the credit calculation is borrowed from | |
2579 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2580 | * new tree will be cluster based, so no meta is needed. | |
2581 | */ | |
78f30c31 TM |
2582 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2583 | struct ocfs2_extent_list *el = | |
2584 | &xb->xb_attrs.xb_root.xt_list; | |
2585 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2586 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2587 | el, 1); | |
90cb546c TM |
2588 | } else |
2589 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2590 | |
2591 | /* | |
2592 | * This cluster will be used either for new bucket or for | |
2593 | * new xattr block. | |
2594 | * If the cluster size is the same as the bucket size, one | |
2595 | * more is needed since we may need to extend the bucket | |
2596 | * also. | |
2597 | */ | |
2598 | clusters_add += 1; | |
85db90e7 | 2599 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2600 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2601 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2602 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2603 | clusters_add += 1; |
85db90e7 TM |
2604 | } |
2605 | } else { | |
78f30c31 | 2606 | meta_add += 1; |
85db90e7 TM |
2607 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2608 | } | |
78f30c31 TM |
2609 | out: |
2610 | if (clusters_need) | |
2611 | *clusters_need = clusters_add; | |
2612 | if (meta_need) | |
2613 | *meta_need = meta_add; | |
85db90e7 TM |
2614 | if (credits_need) |
2615 | *credits_need = credits; | |
78f30c31 TM |
2616 | brelse(bh); |
2617 | return ret; | |
2618 | } | |
2619 | ||
2620 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2621 | struct ocfs2_dinode *di, | |
2622 | struct ocfs2_xattr_info *xi, | |
2623 | struct ocfs2_xattr_search *xis, | |
2624 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 2625 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 2626 | int extra_meta, |
85db90e7 | 2627 | int *credits) |
78f30c31 TM |
2628 | { |
2629 | int clusters_add, meta_add, ret; | |
2630 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2631 | ||
2632 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2633 | ||
2634 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2635 | ||
2636 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2637 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2638 | if (ret) { |
2639 | mlog_errno(ret); | |
2640 | return ret; | |
2641 | } | |
2642 | ||
492a8a33 | 2643 | meta_add += extra_meta; |
85db90e7 TM |
2644 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
2645 | "credits = %d\n", xi->name, meta_add, clusters_add, *credits); | |
78f30c31 TM |
2646 | |
2647 | if (meta_add) { | |
2648 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2649 | &ctxt->meta_ac); | |
2650 | if (ret) { | |
2651 | mlog_errno(ret); | |
2652 | goto out; | |
2653 | } | |
2654 | } | |
2655 | ||
2656 | if (clusters_add) { | |
2657 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2658 | if (ret) | |
2659 | mlog_errno(ret); | |
2660 | } | |
2661 | out: | |
2662 | if (ret) { | |
2663 | if (ctxt->meta_ac) { | |
2664 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2665 | ctxt->meta_ac = NULL; | |
2666 | } | |
2667 | ||
2668 | /* | |
2669 | * We cannot have an error and a non null ctxt->data_ac. | |
2670 | */ | |
2671 | } | |
2672 | ||
2673 | return ret; | |
2674 | } | |
2675 | ||
85db90e7 TM |
2676 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2677 | struct ocfs2_dinode *di, | |
2678 | struct ocfs2_xattr_info *xi, | |
2679 | struct ocfs2_xattr_search *xis, | |
2680 | struct ocfs2_xattr_search *xbs, | |
2681 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2682 | { | |
9f868f16 | 2683 | int ret = 0, credits, old_found; |
85db90e7 TM |
2684 | |
2685 | if (!xi->value) { | |
2686 | /* Remove existing extended attribute */ | |
2687 | if (!xis->not_found) | |
2688 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2689 | else if (!xbs->not_found) | |
2690 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2691 | } else { | |
2692 | /* We always try to set extended attribute into inode first*/ | |
2693 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2694 | if (!ret && !xbs->not_found) { | |
2695 | /* | |
2696 | * If succeed and that extended attribute existing in | |
2697 | * external block, then we will remove it. | |
2698 | */ | |
2699 | xi->value = NULL; | |
2700 | xi->value_len = 0; | |
2701 | ||
9f868f16 | 2702 | old_found = xis->not_found; |
85db90e7 TM |
2703 | xis->not_found = -ENODATA; |
2704 | ret = ocfs2_calc_xattr_set_need(inode, | |
2705 | di, | |
2706 | xi, | |
2707 | xis, | |
2708 | xbs, | |
2709 | NULL, | |
2710 | NULL, | |
2711 | &credits); | |
9f868f16 | 2712 | xis->not_found = old_found; |
85db90e7 TM |
2713 | if (ret) { |
2714 | mlog_errno(ret); | |
2715 | goto out; | |
2716 | } | |
2717 | ||
2718 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2719 | ctxt->handle->h_buffer_credits); | |
2720 | if (ret) { | |
2721 | mlog_errno(ret); | |
2722 | goto out; | |
2723 | } | |
2724 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2725 | } else if (ret == -ENOSPC) { | |
2726 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2727 | ret = ocfs2_xattr_block_find(inode, | |
2728 | xi->name_index, | |
2729 | xi->name, xbs); | |
2730 | if (ret) | |
2731 | goto out; | |
2732 | ||
9f868f16 | 2733 | old_found = xis->not_found; |
85db90e7 TM |
2734 | xis->not_found = -ENODATA; |
2735 | ret = ocfs2_calc_xattr_set_need(inode, | |
2736 | di, | |
2737 | xi, | |
2738 | xis, | |
2739 | xbs, | |
2740 | NULL, | |
2741 | NULL, | |
2742 | &credits); | |
9f868f16 | 2743 | xis->not_found = old_found; |
85db90e7 TM |
2744 | if (ret) { |
2745 | mlog_errno(ret); | |
2746 | goto out; | |
2747 | } | |
2748 | ||
2749 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2750 | ctxt->handle->h_buffer_credits); | |
2751 | if (ret) { | |
2752 | mlog_errno(ret); | |
2753 | goto out; | |
2754 | } | |
2755 | } | |
2756 | /* | |
2757 | * If no space in inode, we will set extended attribute | |
2758 | * into external block. | |
2759 | */ | |
2760 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2761 | if (ret) | |
2762 | goto out; | |
2763 | if (!xis->not_found) { | |
2764 | /* | |
2765 | * If succeed and that extended attribute | |
2766 | * existing in inode, we will remove it. | |
2767 | */ | |
2768 | xi->value = NULL; | |
2769 | xi->value_len = 0; | |
2770 | xbs->not_found = -ENODATA; | |
2771 | ret = ocfs2_calc_xattr_set_need(inode, | |
2772 | di, | |
2773 | xi, | |
2774 | xis, | |
2775 | xbs, | |
2776 | NULL, | |
2777 | NULL, | |
2778 | &credits); | |
2779 | if (ret) { | |
2780 | mlog_errno(ret); | |
2781 | goto out; | |
2782 | } | |
2783 | ||
2784 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2785 | ctxt->handle->h_buffer_credits); | |
2786 | if (ret) { | |
2787 | mlog_errno(ret); | |
2788 | goto out; | |
2789 | } | |
2790 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
2791 | xis, ctxt); | |
2792 | } | |
2793 | } | |
2794 | } | |
2795 | ||
4b3f6209 TM |
2796 | if (!ret) { |
2797 | /* Update inode ctime. */ | |
0cf2f763 | 2798 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
2799 | xis->inode_bh, |
2800 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
2801 | if (ret) { |
2802 | mlog_errno(ret); | |
2803 | goto out; | |
2804 | } | |
2805 | ||
2806 | inode->i_ctime = CURRENT_TIME; | |
2807 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
2808 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
2809 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
2810 | } | |
85db90e7 TM |
2811 | out: |
2812 | return ret; | |
2813 | } | |
2814 | ||
6c3faba4 TY |
2815 | /* |
2816 | * This function only called duing creating inode | |
2817 | * for init security/acl xattrs of the new inode. | |
008aafaf | 2818 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
2819 | */ |
2820 | int ocfs2_xattr_set_handle(handle_t *handle, | |
2821 | struct inode *inode, | |
2822 | struct buffer_head *di_bh, | |
2823 | int name_index, | |
2824 | const char *name, | |
2825 | const void *value, | |
2826 | size_t value_len, | |
2827 | int flags, | |
2828 | struct ocfs2_alloc_context *meta_ac, | |
2829 | struct ocfs2_alloc_context *data_ac) | |
2830 | { | |
2831 | struct ocfs2_dinode *di; | |
2832 | int ret; | |
2833 | ||
2834 | struct ocfs2_xattr_info xi = { | |
2835 | .name_index = name_index, | |
2836 | .name = name, | |
2837 | .value = value, | |
2838 | .value_len = value_len, | |
2839 | }; | |
2840 | ||
2841 | struct ocfs2_xattr_search xis = { | |
2842 | .not_found = -ENODATA, | |
2843 | }; | |
2844 | ||
2845 | struct ocfs2_xattr_search xbs = { | |
2846 | .not_found = -ENODATA, | |
2847 | }; | |
2848 | ||
2849 | struct ocfs2_xattr_set_ctxt ctxt = { | |
2850 | .handle = handle, | |
2851 | .meta_ac = meta_ac, | |
2852 | .data_ac = data_ac, | |
2853 | }; | |
2854 | ||
2855 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
2856 | return -EOPNOTSUPP; | |
2857 | ||
008aafaf TY |
2858 | /* |
2859 | * In extreme situation, may need xattr bucket when | |
2860 | * block size is too small. And we have already reserved | |
2861 | * the credits for bucket in mknod. | |
2862 | */ | |
2863 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
2864 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2865 | if (!xbs.bucket) { | |
2866 | mlog_errno(-ENOMEM); | |
2867 | return -ENOMEM; | |
2868 | } | |
2869 | } | |
2870 | ||
6c3faba4 TY |
2871 | xis.inode_bh = xbs.inode_bh = di_bh; |
2872 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2873 | ||
2874 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2875 | ||
2876 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2877 | if (ret) | |
2878 | goto cleanup; | |
2879 | if (xis.not_found) { | |
2880 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2881 | if (ret) | |
2882 | goto cleanup; | |
2883 | } | |
2884 | ||
2885 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
2886 | ||
2887 | cleanup: | |
2888 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2889 | brelse(xbs.xattr_bh); | |
008aafaf | 2890 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
2891 | |
2892 | return ret; | |
2893 | } | |
2894 | ||
cf1d6c76 TY |
2895 | /* |
2896 | * ocfs2_xattr_set() | |
2897 | * | |
2898 | * Set, replace or remove an extended attribute for this inode. | |
2899 | * value is NULL to remove an existing extended attribute, else either | |
2900 | * create or replace an extended attribute. | |
2901 | */ | |
2902 | int ocfs2_xattr_set(struct inode *inode, | |
2903 | int name_index, | |
2904 | const char *name, | |
2905 | const void *value, | |
2906 | size_t value_len, | |
2907 | int flags) | |
2908 | { | |
2909 | struct buffer_head *di_bh = NULL; | |
2910 | struct ocfs2_dinode *di; | |
492a8a33 | 2911 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 2912 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 2913 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 2914 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
492a8a33 | 2915 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
2916 | |
2917 | struct ocfs2_xattr_info xi = { | |
2918 | .name_index = name_index, | |
2919 | .name = name, | |
2920 | .value = value, | |
2921 | .value_len = value_len, | |
2922 | }; | |
2923 | ||
2924 | struct ocfs2_xattr_search xis = { | |
2925 | .not_found = -ENODATA, | |
2926 | }; | |
2927 | ||
2928 | struct ocfs2_xattr_search xbs = { | |
2929 | .not_found = -ENODATA, | |
2930 | }; | |
2931 | ||
8154da3d TY |
2932 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2933 | return -EOPNOTSUPP; | |
2934 | ||
ba937127 JB |
2935 | /* |
2936 | * Only xbs will be used on indexed trees. xis doesn't need a | |
2937 | * bucket. | |
2938 | */ | |
2939 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
2940 | if (!xbs.bucket) { | |
2941 | mlog_errno(-ENOMEM); | |
2942 | return -ENOMEM; | |
2943 | } | |
2944 | ||
cf1d6c76 TY |
2945 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
2946 | if (ret < 0) { | |
2947 | mlog_errno(ret); | |
ba937127 | 2948 | goto cleanup_nolock; |
cf1d6c76 TY |
2949 | } |
2950 | xis.inode_bh = xbs.inode_bh = di_bh; | |
2951 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
2952 | ||
2953 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
2954 | /* | |
2955 | * Scan inode and external block to find the same name | |
2956 | * extended attribute and collect search infomation. | |
2957 | */ | |
2958 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
2959 | if (ret) | |
2960 | goto cleanup; | |
2961 | if (xis.not_found) { | |
2962 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
2963 | if (ret) | |
2964 | goto cleanup; | |
2965 | } | |
2966 | ||
2967 | if (xis.not_found && xbs.not_found) { | |
2968 | ret = -ENODATA; | |
2969 | if (flags & XATTR_REPLACE) | |
2970 | goto cleanup; | |
2971 | ret = 0; | |
2972 | if (!value) | |
2973 | goto cleanup; | |
2974 | } else { | |
2975 | ret = -EEXIST; | |
2976 | if (flags & XATTR_CREATE) | |
2977 | goto cleanup; | |
2978 | } | |
2979 | ||
492a8a33 TM |
2980 | /* Check whether the value is refcounted and do some prepartion. */ |
2981 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && | |
2982 | (!xis.not_found || !xbs.not_found)) { | |
2983 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
2984 | &xis, &xbs, &ref_tree, | |
2985 | &ref_meta, &ref_credits); | |
2986 | if (ret) { | |
2987 | mlog_errno(ret); | |
2988 | goto cleanup; | |
2989 | } | |
2990 | } | |
85db90e7 TM |
2991 | |
2992 | mutex_lock(&tl_inode->i_mutex); | |
2993 | ||
2994 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
2995 | ret = __ocfs2_flush_truncate_log(osb); | |
2996 | if (ret < 0) { | |
2997 | mutex_unlock(&tl_inode->i_mutex); | |
2998 | mlog_errno(ret); | |
2999 | goto cleanup; | |
3000 | } | |
3001 | } | |
3002 | mutex_unlock(&tl_inode->i_mutex); | |
3003 | ||
3004 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3005 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3006 | if (ret) { |
3007 | mlog_errno(ret); | |
3008 | goto cleanup; | |
3009 | } | |
3010 | ||
4b3f6209 TM |
3011 | /* we need to update inode's ctime field, so add credit for it. */ |
3012 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3013 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3014 | if (IS_ERR(ctxt.handle)) { |
3015 | ret = PTR_ERR(ctxt.handle); | |
3016 | mlog_errno(ret); | |
3017 | goto cleanup; | |
cf1d6c76 | 3018 | } |
85db90e7 TM |
3019 | |
3020 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3021 | ||
3022 | ocfs2_commit_trans(osb, ctxt.handle); | |
3023 | ||
78f30c31 TM |
3024 | if (ctxt.data_ac) |
3025 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3026 | if (ctxt.meta_ac) | |
3027 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3028 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3029 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3030 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3031 | |
cf1d6c76 | 3032 | cleanup: |
492a8a33 TM |
3033 | if (ref_tree) |
3034 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3035 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3036 | if (!value && !ret) { |
3037 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3038 | if (ret) | |
3039 | mlog_errno(ret); | |
3040 | } | |
cf1d6c76 | 3041 | ocfs2_inode_unlock(inode, 1); |
ba937127 | 3042 | cleanup_nolock: |
cf1d6c76 TY |
3043 | brelse(di_bh); |
3044 | brelse(xbs.xattr_bh); | |
ba937127 | 3045 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3046 | |
3047 | return ret; | |
3048 | } | |
3049 | ||
0c044f0b TM |
3050 | /* |
3051 | * Find the xattr extent rec which may contains name_hash. | |
3052 | * e_cpos will be the first name hash of the xattr rec. | |
3053 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3054 | */ | |
3055 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3056 | u32 name_hash, | |
3057 | u64 *p_blkno, | |
3058 | u32 *e_cpos, | |
3059 | u32 *num_clusters, | |
3060 | struct ocfs2_extent_list *el) | |
3061 | { | |
3062 | int ret = 0, i; | |
3063 | struct buffer_head *eb_bh = NULL; | |
3064 | struct ocfs2_extent_block *eb; | |
3065 | struct ocfs2_extent_rec *rec = NULL; | |
3066 | u64 e_blkno = 0; | |
3067 | ||
3068 | if (el->l_tree_depth) { | |
facdb77f JB |
3069 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3070 | &eb_bh); | |
0c044f0b TM |
3071 | if (ret) { |
3072 | mlog_errno(ret); | |
3073 | goto out; | |
3074 | } | |
3075 | ||
3076 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3077 | el = &eb->h_list; | |
3078 | ||
3079 | if (el->l_tree_depth) { | |
3080 | ocfs2_error(inode->i_sb, | |
3081 | "Inode %lu has non zero tree depth in " | |
3082 | "xattr tree block %llu\n", inode->i_ino, | |
3083 | (unsigned long long)eb_bh->b_blocknr); | |
3084 | ret = -EROFS; | |
3085 | goto out; | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3090 | rec = &el->l_recs[i]; | |
3091 | ||
3092 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3093 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3094 | break; | |
3095 | } | |
3096 | } | |
3097 | ||
3098 | if (!e_blkno) { | |
3099 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
3100 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
3101 | le32_to_cpu(rec->e_cpos), | |
3102 | ocfs2_rec_clusters(el, rec)); | |
3103 | ret = -EROFS; | |
3104 | goto out; | |
3105 | } | |
3106 | ||
3107 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3108 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3109 | if (e_cpos) | |
3110 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3111 | out: | |
3112 | brelse(eb_bh); | |
3113 | return ret; | |
3114 | } | |
3115 | ||
3116 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3117 | struct ocfs2_xattr_bucket *bucket, | |
3118 | void *para); | |
3119 | ||
589dc260 | 3120 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3121 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3122 | int name_index, |
3123 | const char *name, | |
3124 | u32 name_hash, | |
3125 | u16 *xe_index, | |
3126 | int *found) | |
3127 | { | |
3128 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3129 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3130 | size_t name_len = strlen(name); |
3131 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3132 | char *xe_name; |
3133 | ||
3134 | /* | |
3135 | * We don't use binary search in the bucket because there | |
3136 | * may be multiple entries with the same name hash. | |
3137 | */ | |
3138 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3139 | xe = &xh->xh_entries[i]; | |
3140 | ||
3141 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3142 | continue; | |
3143 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3144 | break; | |
3145 | ||
3146 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3147 | if (!cmp) | |
3148 | cmp = name_len - xe->xe_name_len; | |
3149 | if (cmp) | |
3150 | continue; | |
3151 | ||
fd68a894 | 3152 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3153 | xh, |
3154 | i, | |
3155 | &block_off, | |
3156 | &new_offset); | |
3157 | if (ret) { | |
3158 | mlog_errno(ret); | |
3159 | break; | |
3160 | } | |
3161 | ||
970e4936 | 3162 | |
e2356a3f JB |
3163 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3164 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3165 | *xe_index = i; |
3166 | *found = 1; | |
3167 | ret = 0; | |
3168 | break; | |
3169 | } | |
3170 | } | |
3171 | ||
3172 | return ret; | |
3173 | } | |
3174 | ||
3175 | /* | |
3176 | * Find the specified xattr entry in a series of buckets. | |
3177 | * This series start from p_blkno and last for num_clusters. | |
3178 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3179 | * the num of the valid buckets. | |
3180 | * | |
3181 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3182 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3183 | */ | |
3184 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3185 | int name_index, | |
3186 | const char *name, | |
3187 | u32 name_hash, | |
3188 | u64 p_blkno, | |
3189 | u32 first_hash, | |
3190 | u32 num_clusters, | |
3191 | struct ocfs2_xattr_search *xs) | |
3192 | { | |
3193 | int ret, found = 0; | |
589dc260 TM |
3194 | struct ocfs2_xattr_header *xh = NULL; |
3195 | struct ocfs2_xattr_entry *xe = NULL; | |
3196 | u16 index = 0; | |
3197 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3198 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3199 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3200 | u32 last_hash; |
e2356a3f | 3201 | u64 blkno, lower_blkno = 0; |
589dc260 | 3202 | |
e2356a3f JB |
3203 | search = ocfs2_xattr_bucket_new(inode); |
3204 | if (!search) { | |
3205 | ret = -ENOMEM; | |
3206 | mlog_errno(ret); | |
3207 | goto out; | |
3208 | } | |
3209 | ||
3210 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3211 | if (ret) { |
3212 | mlog_errno(ret); | |
3213 | goto out; | |
3214 | } | |
3215 | ||
e2356a3f | 3216 | xh = bucket_xh(search); |
589dc260 | 3217 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3218 | while (low_bucket <= high_bucket) { |
e2356a3f | 3219 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3220 | |
e2356a3f | 3221 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3222 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3223 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3224 | if (ret) { |
3225 | mlog_errno(ret); | |
3226 | goto out; | |
3227 | } | |
3228 | ||
e2356a3f | 3229 | xh = bucket_xh(search); |
589dc260 TM |
3230 | xe = &xh->xh_entries[0]; |
3231 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3232 | high_bucket = bucket - 1; | |
3233 | continue; | |
3234 | } | |
3235 | ||
3236 | /* | |
3237 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3238 | * bucket is larger than the search one. for an empty |
3239 | * bucket, the last one is also the first one. | |
589dc260 | 3240 | */ |
5a095611 TM |
3241 | if (xh->xh_count) |
3242 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3243 | ||
589dc260 TM |
3244 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3245 | ||
e2356a3f JB |
3246 | /* record lower_blkno which may be the insert place. */ |
3247 | lower_blkno = blkno; | |
589dc260 TM |
3248 | |
3249 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3250 | low_bucket = bucket + 1; | |
3251 | continue; | |
3252 | } | |
3253 | ||
3254 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3255 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3256 | name_index, name, name_hash, |
3257 | &index, &found); | |
3258 | if (ret) { | |
3259 | mlog_errno(ret); | |
3260 | goto out; | |
3261 | } | |
3262 | break; | |
3263 | } | |
3264 | ||
3265 | /* | |
3266 | * Record the bucket we have found. | |
3267 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3268 | * always set it to the previous bucket. | |
3269 | */ | |
e2356a3f JB |
3270 | if (!lower_blkno) |
3271 | lower_blkno = p_blkno; | |
3272 | ||
3273 | /* This should be in cache - we just read it during the search */ | |
3274 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3275 | if (ret) { | |
3276 | mlog_errno(ret); | |
3277 | goto out; | |
589dc260 | 3278 | } |
589dc260 | 3279 | |
ba937127 JB |
3280 | xs->header = bucket_xh(xs->bucket); |
3281 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3282 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3283 | ||
3284 | if (found) { | |
589dc260 TM |
3285 | xs->here = &xs->header->xh_entries[index]; |
3286 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3287 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3288 | } else |
3289 | ret = -ENODATA; | |
3290 | ||
3291 | out: | |
e2356a3f | 3292 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3293 | return ret; |
3294 | } | |
3295 | ||
3296 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3297 | struct buffer_head *root_bh, | |
3298 | int name_index, | |
3299 | const char *name, | |
3300 | struct ocfs2_xattr_search *xs) | |
3301 | { | |
3302 | int ret; | |
3303 | struct ocfs2_xattr_block *xb = | |
3304 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3305 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3306 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3307 | u64 p_blkno = 0; | |
3308 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3309 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3310 | |
3311 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3312 | return -ENODATA; | |
3313 | ||
3314 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3315 | name, name_hash, name_index); | |
3316 | ||
3317 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3318 | &num_clusters, el); | |
3319 | if (ret) { | |
3320 | mlog_errno(ret); | |
3321 | goto out; | |
3322 | } | |
3323 | ||
3324 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3325 | ||
3326 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3327 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3328 | first_hash); | |
589dc260 TM |
3329 | |
3330 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3331 | p_blkno, first_hash, num_clusters, xs); | |
3332 | ||
3333 | out: | |
3334 | return ret; | |
3335 | } | |
3336 | ||
0c044f0b TM |
3337 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3338 | u64 blkno, | |
3339 | u32 clusters, | |
3340 | xattr_bucket_func *func, | |
3341 | void *para) | |
3342 | { | |
6dde41d9 | 3343 | int i, ret = 0; |
0c044f0b TM |
3344 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3345 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3346 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3347 | |
ba937127 JB |
3348 | bucket = ocfs2_xattr_bucket_new(inode); |
3349 | if (!bucket) { | |
3350 | mlog_errno(-ENOMEM); | |
3351 | return -ENOMEM; | |
3352 | } | |
0c044f0b TM |
3353 | |
3354 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3355 | clusters, (unsigned long long)blkno); |
0c044f0b | 3356 | |
ba937127 JB |
3357 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3358 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3359 | if (ret) { |
3360 | mlog_errno(ret); | |
ba937127 | 3361 | break; |
0c044f0b TM |
3362 | } |
3363 | ||
0c044f0b TM |
3364 | /* |
3365 | * The real bucket num in this series of blocks is stored | |
3366 | * in the 1st bucket. | |
3367 | */ | |
3368 | if (i == 0) | |
ba937127 | 3369 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3370 | |
de29c085 MF |
3371 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3372 | (unsigned long long)blkno, | |
ba937127 | 3373 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3374 | if (func) { |
ba937127 | 3375 | ret = func(inode, bucket, para); |
a46fa684 | 3376 | if (ret && ret != -ERANGE) |
0c044f0b | 3377 | mlog_errno(ret); |
ba937127 | 3378 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3379 | } |
3380 | ||
ba937127 JB |
3381 | ocfs2_xattr_bucket_relse(bucket); |
3382 | if (ret) | |
3383 | break; | |
0c044f0b TM |
3384 | } |
3385 | ||
ba937127 | 3386 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3387 | return ret; |
3388 | } | |
3389 | ||
3390 | struct ocfs2_xattr_tree_list { | |
3391 | char *buffer; | |
3392 | size_t buffer_size; | |
936b8834 | 3393 | size_t result; |
0c044f0b TM |
3394 | }; |
3395 | ||
fd68a894 | 3396 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
3397 | struct ocfs2_xattr_header *xh, |
3398 | int index, | |
3399 | int *block_off, | |
3400 | int *new_offset) | |
3401 | { | |
3402 | u16 name_offset; | |
3403 | ||
3404 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3405 | return -EINVAL; | |
3406 | ||
3407 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3408 | ||
fd68a894 TM |
3409 | *block_off = name_offset >> sb->s_blocksize_bits; |
3410 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
3411 | |
3412 | return 0; | |
3413 | } | |
3414 | ||
3415 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3416 | struct ocfs2_xattr_bucket *bucket, | |
3417 | void *para) | |
3418 | { | |
936b8834 | 3419 | int ret = 0, type; |
0c044f0b | 3420 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3421 | int i, block_off, new_offset; |
936b8834 | 3422 | const char *prefix, *name; |
0c044f0b | 3423 | |
3e632946 JB |
3424 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3425 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3426 | type = ocfs2_xattr_get_type(entry); |
3427 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3428 | |
936b8834 | 3429 | if (prefix) { |
fd68a894 | 3430 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 3431 | bucket_xh(bucket), |
0c044f0b TM |
3432 | i, |
3433 | &block_off, | |
3434 | &new_offset); | |
3435 | if (ret) | |
3436 | break; | |
936b8834 | 3437 | |
51def39f | 3438 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3439 | new_offset; |
3440 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3441 | xl->buffer_size, | |
3442 | &xl->result, | |
3443 | prefix, name, | |
3444 | entry->xe_name_len); | |
3445 | if (ret) | |
3446 | break; | |
0c044f0b TM |
3447 | } |
3448 | } | |
3449 | ||
3450 | return ret; | |
3451 | } | |
3452 | ||
47bca495 TM |
3453 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
3454 | struct buffer_head *blk_bh, | |
3455 | xattr_tree_rec_func *rec_func, | |
3456 | void *para) | |
0c044f0b | 3457 | { |
47bca495 TM |
3458 | struct ocfs2_xattr_block *xb = |
3459 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
3460 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
3461 | int ret = 0; |
3462 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3463 | u64 p_blkno = 0; | |
0c044f0b | 3464 | |
47bca495 | 3465 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
3466 | return 0; |
3467 | ||
3468 | while (name_hash > 0) { | |
3469 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3470 | &e_cpos, &num_clusters, el); | |
3471 | if (ret) { | |
3472 | mlog_errno(ret); | |
47bca495 | 3473 | break; |
0c044f0b TM |
3474 | } |
3475 | ||
47bca495 TM |
3476 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
3477 | num_clusters, para); | |
0c044f0b | 3478 | if (ret) { |
a46fa684 TM |
3479 | if (ret != -ERANGE) |
3480 | mlog_errno(ret); | |
47bca495 | 3481 | break; |
0c044f0b TM |
3482 | } |
3483 | ||
3484 | if (e_cpos == 0) | |
3485 | break; | |
3486 | ||
3487 | name_hash = e_cpos - 1; | |
3488 | } | |
3489 | ||
47bca495 TM |
3490 | return ret; |
3491 | ||
3492 | } | |
3493 | ||
3494 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
3495 | struct buffer_head *root_bh, | |
3496 | u64 blkno, u32 cpos, u32 len, void *para) | |
3497 | { | |
3498 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
3499 | ocfs2_list_xattr_bucket, para); | |
3500 | } | |
3501 | ||
3502 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3503 | struct buffer_head *blk_bh, | |
3504 | char *buffer, | |
3505 | size_t buffer_size) | |
3506 | { | |
3507 | int ret; | |
3508 | struct ocfs2_xattr_tree_list xl = { | |
3509 | .buffer = buffer, | |
3510 | .buffer_size = buffer_size, | |
3511 | .result = 0, | |
3512 | }; | |
3513 | ||
3514 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
3515 | ocfs2_list_xattr_tree_rec, &xl); | |
3516 | if (ret) { | |
3517 | mlog_errno(ret); | |
3518 | goto out; | |
3519 | } | |
3520 | ||
936b8834 | 3521 | ret = xl.result; |
0c044f0b TM |
3522 | out: |
3523 | return ret; | |
3524 | } | |
01225596 TM |
3525 | |
3526 | static int cmp_xe(const void *a, const void *b) | |
3527 | { | |
3528 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3529 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3530 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3531 | ||
3532 | if (l_hash > r_hash) | |
3533 | return 1; | |
3534 | if (l_hash < r_hash) | |
3535 | return -1; | |
3536 | return 0; | |
3537 | } | |
3538 | ||
3539 | static void swap_xe(void *a, void *b, int size) | |
3540 | { | |
3541 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3542 | ||
3543 | tmp = *l; | |
3544 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3545 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3546 | } | |
3547 | ||
3548 | /* | |
3549 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3550 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3551 | * The header goes at the start of the bucket, and the names+values are |
3552 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3553 | * Note: we need to sort the entries since they are not saved in order |
3554 | * in the ocfs2_xattr_block. | |
3555 | */ | |
3556 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3557 | struct buffer_head *xb_bh, | |
178eeac3 | 3558 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3559 | { |
3560 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3561 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3562 | u16 offset, size, off_change; |
3563 | struct ocfs2_xattr_entry *xe; | |
3564 | struct ocfs2_xattr_block *xb = | |
3565 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3566 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3567 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3568 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3569 | char *src = xb_bh->b_data; |
3570 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3571 | |
3572 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3573 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3574 | (unsigned long long)bucket_blkno(bucket)); |
3575 | ||
3576 | for (i = 0; i < blks; i++) | |
3577 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3578 | |
01225596 TM |
3579 | /* |
3580 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3581 | * there is a offset change corresponding to the change of | |
3582 | * ocfs2_xattr_header's position. | |
3583 | */ | |
3584 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3585 | xe = &xb_xh->xh_entries[count - 1]; | |
3586 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3587 | size = blocksize - offset; | |
3588 | ||
3589 | /* copy all the names and values. */ | |
01225596 TM |
3590 | memcpy(target + offset, src + offset, size); |
3591 | ||
3592 | /* Init new header now. */ | |
3593 | xh->xh_count = xb_xh->xh_count; | |
3594 | xh->xh_num_buckets = cpu_to_le16(1); | |
3595 | xh->xh_name_value_len = cpu_to_le16(size); | |
3596 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3597 | ||
3598 | /* copy all the entries. */ | |
178eeac3 | 3599 | target = bucket_block(bucket, 0); |
01225596 TM |
3600 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3601 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3602 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3603 | ||
3604 | /* Change the xe offset for all the xe because of the move. */ | |
3605 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3606 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3607 | for (i = 0; i < count; i++) | |
3608 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3609 | ||
3610 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3611 | offset, size, off_change); | |
3612 | ||
3613 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3614 | cmp_xe, swap_xe); | |
3615 | } | |
3616 | ||
3617 | /* | |
3618 | * After we move xattr from block to index btree, we have to | |
3619 | * update ocfs2_xattr_search to the new xe and base. | |
3620 | * | |
3621 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3622 | * While if the entry is in index b-tree, "bucket" indicates the | |
3623 | * real place of the xattr. | |
3624 | */ | |
178eeac3 JB |
3625 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3626 | struct ocfs2_xattr_search *xs, | |
3627 | struct buffer_head *old_bh) | |
01225596 | 3628 | { |
01225596 TM |
3629 | char *buf = old_bh->b_data; |
3630 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3631 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3632 | int i; |
01225596 | 3633 | |
ba937127 | 3634 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3635 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3636 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3637 | ||
178eeac3 JB |
3638 | if (xs->not_found) |
3639 | return; | |
01225596 | 3640 | |
178eeac3 JB |
3641 | i = xs->here - old_xh->xh_entries; |
3642 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3643 | } |
3644 | ||
3645 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3646 | struct ocfs2_xattr_search *xs, |
3647 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3648 | { |
85db90e7 | 3649 | int ret; |
01225596 TM |
3650 | u32 bit_off, len; |
3651 | u64 blkno; | |
85db90e7 | 3652 | handle_t *handle = ctxt->handle; |
01225596 TM |
3653 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3654 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3655 | struct buffer_head *xb_bh = xs->xattr_bh; |
3656 | struct ocfs2_xattr_block *xb = | |
3657 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3658 | struct ocfs2_xattr_tree_root *xr; | |
3659 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3660 | |
3661 | mlog(0, "create xattr index block for %llu\n", | |
3662 | (unsigned long long)xb_bh->b_blocknr); | |
3663 | ||
3664 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3665 | BUG_ON(!xs->bucket); |
01225596 | 3666 | |
01225596 TM |
3667 | /* |
3668 | * XXX: | |
3669 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3670 | * if performance becomes a problem later. | |
3671 | */ | |
3672 | down_write(&oi->ip_alloc_sem); | |
3673 | ||
0cf2f763 | 3674 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 3675 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3676 | if (ret) { |
3677 | mlog_errno(ret); | |
85db90e7 | 3678 | goto out; |
01225596 TM |
3679 | } |
3680 | ||
78f30c31 TM |
3681 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3682 | 1, 1, &bit_off, &len); | |
01225596 TM |
3683 | if (ret) { |
3684 | mlog_errno(ret); | |
85db90e7 | 3685 | goto out; |
01225596 TM |
3686 | } |
3687 | ||
3688 | /* | |
3689 | * The bucket may spread in many blocks, and | |
3690 | * we will only touch the 1st block and the last block | |
3691 | * in the whole bucket(one for entry and one for data). | |
3692 | */ | |
3693 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3694 | ||
de29c085 MF |
3695 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3696 | (unsigned long long)blkno); | |
01225596 | 3697 | |
178eeac3 JB |
3698 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3699 | if (ret) { | |
01225596 | 3700 | mlog_errno(ret); |
85db90e7 | 3701 | goto out; |
01225596 TM |
3702 | } |
3703 | ||
178eeac3 JB |
3704 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3705 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3706 | if (ret) { |
3707 | mlog_errno(ret); | |
85db90e7 | 3708 | goto out; |
01225596 TM |
3709 | } |
3710 | ||
178eeac3 JB |
3711 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3712 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3713 | |
178eeac3 | 3714 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3715 | |
3716 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3717 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3718 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3719 | ||
3720 | xr = &xb->xb_attrs.xb_root; | |
3721 | xr->xt_clusters = cpu_to_le32(1); | |
3722 | xr->xt_last_eb_blk = 0; | |
3723 | xr->xt_list.l_tree_depth = 0; | |
3724 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3725 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3726 | ||
3727 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3728 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3729 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3730 | ||
3731 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3732 | ||
85db90e7 | 3733 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3734 | |
85db90e7 | 3735 | out: |
01225596 TM |
3736 | up_write(&oi->ip_alloc_sem); |
3737 | ||
01225596 TM |
3738 | return ret; |
3739 | } | |
3740 | ||
3741 | static int cmp_xe_offset(const void *a, const void *b) | |
3742 | { | |
3743 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3744 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3745 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3746 | ||
3747 | if (l_name_offset < r_name_offset) | |
3748 | return 1; | |
3749 | if (l_name_offset > r_name_offset) | |
3750 | return -1; | |
3751 | return 0; | |
3752 | } | |
3753 | ||
3754 | /* | |
3755 | * defrag a xattr bucket if we find that the bucket has some | |
3756 | * holes beteen name/value pairs. | |
3757 | * We will move all the name/value pairs to the end of the bucket | |
3758 | * so that we can spare some space for insertion. | |
3759 | */ | |
3760 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3761 | handle_t *handle, |
01225596 TM |
3762 | struct ocfs2_xattr_bucket *bucket) |
3763 | { | |
3764 | int ret, i; | |
3765 | size_t end, offset, len, value_len; | |
3766 | struct ocfs2_xattr_header *xh; | |
3767 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3768 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3769 | u16 xh_free_start; |
01225596 | 3770 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3771 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3772 | |
3773 | /* | |
3774 | * In order to make the operation more efficient and generic, | |
3775 | * we copy all the blocks into a contiguous memory and do the | |
3776 | * defragment there, so if anything is error, we will not touch | |
3777 | * the real block. | |
3778 | */ | |
3779 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3780 | if (!bucket_buf) { | |
3781 | ret = -EIO; | |
3782 | goto out; | |
3783 | } | |
3784 | ||
3785 | buf = bucket_buf; | |
1c32a2fd TM |
3786 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3787 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 3788 | |
1c32a2fd | 3789 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
3790 | OCFS2_JOURNAL_ACCESS_WRITE); |
3791 | if (ret < 0) { | |
3792 | mlog_errno(ret); | |
85db90e7 | 3793 | goto out; |
01225596 TM |
3794 | } |
3795 | ||
3796 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
3797 | entries = (char *)xh->xh_entries; | |
3798 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
3799 | ||
3800 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
3801 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
3802 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
3803 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
3804 | |
3805 | /* | |
3806 | * sort all the entries by their offset. | |
3807 | * the largest will be the first, so that we can | |
3808 | * move them to the end one by one. | |
3809 | */ | |
3810 | sort(entries, le16_to_cpu(xh->xh_count), | |
3811 | sizeof(struct ocfs2_xattr_entry), | |
3812 | cmp_xe_offset, swap_xe); | |
3813 | ||
3814 | /* Move all name/values to the end of the bucket. */ | |
3815 | xe = xh->xh_entries; | |
3816 | end = OCFS2_XATTR_BUCKET_SIZE; | |
3817 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
3818 | offset = le16_to_cpu(xe->xe_name_offset); | |
3819 | if (ocfs2_xattr_is_local(xe)) | |
3820 | value_len = OCFS2_XATTR_SIZE( | |
3821 | le64_to_cpu(xe->xe_value_size)); | |
3822 | else | |
3823 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
3824 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
3825 | ||
3826 | /* | |
3827 | * We must make sure that the name/value pair | |
3828 | * exist in the same block. So adjust end to | |
3829 | * the previous block end if needed. | |
3830 | */ | |
3831 | if (((end - len) / blocksize != | |
3832 | (end - 1) / blocksize)) | |
3833 | end = end - end % blocksize; | |
3834 | ||
3835 | if (end > offset + len) { | |
3836 | memmove(bucket_buf + end - len, | |
3837 | bucket_buf + offset, len); | |
3838 | xe->xe_name_offset = cpu_to_le16(end - len); | |
3839 | } | |
3840 | ||
3841 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
3842 | "bucket %llu\n", (unsigned long long)blkno); | |
3843 | ||
3844 | end -= len; | |
3845 | } | |
3846 | ||
3847 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
3848 | "bucket %llu\n", (unsigned long long)blkno); | |
3849 | ||
3850 | if (xh_free_start == end) | |
85db90e7 | 3851 | goto out; |
01225596 TM |
3852 | |
3853 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
3854 | xh->xh_free_start = cpu_to_le16(end); | |
3855 | ||
3856 | /* sort the entries by their name_hash. */ | |
3857 | sort(entries, le16_to_cpu(xh->xh_count), | |
3858 | sizeof(struct ocfs2_xattr_entry), | |
3859 | cmp_xe, swap_xe); | |
3860 | ||
3861 | buf = bucket_buf; | |
1c32a2fd TM |
3862 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
3863 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
3864 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 3865 | |
01225596 | 3866 | out: |
01225596 TM |
3867 | kfree(bucket_buf); |
3868 | return ret; | |
3869 | } | |
3870 | ||
3871 | /* | |
b5c03e74 JB |
3872 | * prev_blkno points to the start of an existing extent. new_blkno |
3873 | * points to a newly allocated extent. Because we know each of our | |
3874 | * clusters contains more than bucket, we can easily split one cluster | |
3875 | * at a bucket boundary. So we take the last cluster of the existing | |
3876 | * extent and split it down the middle. We move the last half of the | |
3877 | * buckets in the last cluster of the existing extent over to the new | |
3878 | * extent. | |
01225596 | 3879 | * |
b5c03e74 JB |
3880 | * first_bh is the buffer at prev_blkno so we can update the existing |
3881 | * extent's bucket count. header_bh is the bucket were we were hoping | |
3882 | * to insert our xattr. If the bucket move places the target in the new | |
3883 | * extent, we'll update first_bh and header_bh after modifying the old | |
3884 | * extent. | |
3885 | * | |
3886 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
3887 | */ |
3888 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
3889 | handle_t *handle, | |
41cb8148 JB |
3890 | struct ocfs2_xattr_bucket *first, |
3891 | struct ocfs2_xattr_bucket *target, | |
01225596 | 3892 | u64 new_blkno, |
01225596 TM |
3893 | u32 num_clusters, |
3894 | u32 *first_hash) | |
3895 | { | |
c58b6032 | 3896 | int ret; |
41cb8148 JB |
3897 | struct super_block *sb = inode->i_sb; |
3898 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
3899 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 3900 | int to_move = num_buckets / 2; |
c58b6032 | 3901 | u64 src_blkno; |
41cb8148 JB |
3902 | u64 last_cluster_blkno = bucket_blkno(first) + |
3903 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 3904 | |
41cb8148 JB |
3905 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
3906 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 3907 | |
01225596 | 3908 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 3909 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 3910 | |
41cb8148 | 3911 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
3912 | last_cluster_blkno, new_blkno, |
3913 | to_move, first_hash); | |
01225596 TM |
3914 | if (ret) { |
3915 | mlog_errno(ret); | |
3916 | goto out; | |
3917 | } | |
3918 | ||
c58b6032 JB |
3919 | /* This is the first bucket that got moved */ |
3920 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 3921 | |
b5c03e74 | 3922 | /* |
c58b6032 | 3923 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 3924 | * update first and target. |
b5c03e74 | 3925 | */ |
41cb8148 | 3926 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
3927 | /* Find the block for the new target bucket */ |
3928 | src_blkno = new_blkno + | |
41cb8148 JB |
3929 | (bucket_blkno(target) - src_blkno); |
3930 | ||
3931 | ocfs2_xattr_bucket_relse(first); | |
3932 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 3933 | |
b5c03e74 | 3934 | /* |
c58b6032 | 3935 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
3936 | * journal from ocfs2_cp_xattr_bucket(). |
3937 | */ | |
41cb8148 | 3938 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
3939 | if (ret) { |
3940 | mlog_errno(ret); | |
3941 | goto out; | |
3942 | } | |
41cb8148 JB |
3943 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
3944 | if (ret) | |
b5c03e74 | 3945 | mlog_errno(ret); |
01225596 | 3946 | |
01225596 TM |
3947 | } |
3948 | ||
01225596 | 3949 | out: |
01225596 TM |
3950 | return ret; |
3951 | } | |
3952 | ||
01225596 | 3953 | /* |
80bcaf34 TM |
3954 | * Find the suitable pos when we divide a bucket into 2. |
3955 | * We have to make sure the xattrs with the same hash value exist | |
3956 | * in the same bucket. | |
3957 | * | |
3958 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
3959 | * place where the hash value changes. Try to find the most even split. | |
3960 | * The most common case is that all entries have different hash values, | |
3961 | * and the first check we make will find a place to split. | |
3962 | */ | |
3963 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
3964 | { | |
3965 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
3966 | int count = le16_to_cpu(xh->xh_count); | |
3967 | int delta, middle = count / 2; | |
3968 | ||
3969 | /* | |
3970 | * We start at the middle. Each step gets farther away in both | |
3971 | * directions. We therefore hit the change in hash value | |
3972 | * nearest to the middle. Note that this loop does not execute for | |
3973 | * count < 2. | |
3974 | */ | |
3975 | for (delta = 0; delta < middle; delta++) { | |
3976 | /* Let's check delta earlier than middle */ | |
3977 | if (cmp_xe(&entries[middle - delta - 1], | |
3978 | &entries[middle - delta])) | |
3979 | return middle - delta; | |
3980 | ||
3981 | /* For even counts, don't walk off the end */ | |
3982 | if ((middle + delta + 1) == count) | |
3983 | continue; | |
3984 | ||
3985 | /* Now try delta past middle */ | |
3986 | if (cmp_xe(&entries[middle + delta], | |
3987 | &entries[middle + delta + 1])) | |
3988 | return middle + delta + 1; | |
3989 | } | |
3990 | ||
3991 | /* Every entry had the same hash */ | |
3992 | return count; | |
3993 | } | |
3994 | ||
3995 | /* | |
3996 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 3997 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
3998 | * |
3999 | * Normally half of the xattrs will be moved. But we have to make | |
4000 | * sure that the xattrs with the same hash value are stored in the | |
4001 | * same bucket. If all the xattrs in this bucket have the same hash | |
4002 | * value, the new bucket will be initialized as an empty one and the | |
4003 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4004 | */ |
80bcaf34 TM |
4005 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4006 | handle_t *handle, | |
4007 | u64 blk, | |
4008 | u64 new_blk, | |
4009 | u32 *first_hash, | |
4010 | int new_bucket_head) | |
01225596 TM |
4011 | { |
4012 | int ret, i; | |
80bcaf34 | 4013 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 4014 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4015 | struct ocfs2_xattr_header *xh; |
4016 | struct ocfs2_xattr_entry *xe; | |
4017 | int blocksize = inode->i_sb->s_blocksize; | |
4018 | ||
80bcaf34 | 4019 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 4020 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 4021 | |
ba937127 JB |
4022 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4023 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4024 | if (!s_bucket || !t_bucket) { | |
4025 | ret = -ENOMEM; | |
4026 | mlog_errno(ret); | |
4027 | goto out; | |
4028 | } | |
01225596 | 4029 | |
ba937127 | 4030 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4031 | if (ret) { |
4032 | mlog_errno(ret); | |
4033 | goto out; | |
4034 | } | |
4035 | ||
ba937127 | 4036 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4037 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4038 | if (ret) { |
4039 | mlog_errno(ret); | |
4040 | goto out; | |
4041 | } | |
4042 | ||
784b816a JB |
4043 | /* |
4044 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4045 | * there's no need to read it. | |
4046 | */ | |
ba937127 | 4047 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
4048 | if (ret) { |
4049 | mlog_errno(ret); | |
4050 | goto out; | |
4051 | } | |
4052 | ||
2b656c1d JB |
4053 | /* |
4054 | * Hey, if we're overwriting t_bucket, what difference does | |
4055 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4056 | * same part of ocfs2_cp_xattr_bucket(). | |
4057 | */ | |
ba937127 | 4058 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4059 | new_bucket_head ? |
4060 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4061 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4062 | if (ret) { | |
4063 | mlog_errno(ret); | |
4064 | goto out; | |
01225596 TM |
4065 | } |
4066 | ||
ba937127 | 4067 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4068 | count = le16_to_cpu(xh->xh_count); |
4069 | start = ocfs2_xattr_find_divide_pos(xh); | |
4070 | ||
4071 | if (start == count) { | |
4072 | xe = &xh->xh_entries[start-1]; | |
4073 | ||
4074 | /* | |
4075 | * initialized a new empty bucket here. | |
4076 | * The hash value is set as one larger than | |
4077 | * that of the last entry in the previous bucket. | |
4078 | */ | |
ba937127 JB |
4079 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4080 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4081 | |
ba937127 | 4082 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4083 | xh->xh_free_start = cpu_to_le16(blocksize); |
4084 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4085 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4086 | ||
4087 | goto set_num_buckets; | |
4088 | } | |
4089 | ||
01225596 | 4090 | /* copy the whole bucket to the new first. */ |
ba937127 | 4091 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4092 | |
4093 | /* update the new bucket. */ | |
ba937127 | 4094 | xh = bucket_xh(t_bucket); |
01225596 TM |
4095 | |
4096 | /* | |
4097 | * Calculate the total name/value len and xh_free_start for | |
4098 | * the old bucket first. | |
4099 | */ | |
4100 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4101 | name_value_len = 0; | |
4102 | for (i = 0; i < start; i++) { | |
4103 | xe = &xh->xh_entries[i]; | |
4104 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4105 | if (ocfs2_xattr_is_local(xe)) | |
4106 | xe_len += | |
4107 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4108 | else | |
4109 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4110 | name_value_len += xe_len; | |
4111 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
4112 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4113 | } | |
4114 | ||
4115 | /* | |
4116 | * Now begin the modification to the new bucket. | |
4117 | * | |
4118 | * In the new bucket, We just move the xattr entry to the beginning | |
4119 | * and don't touch the name/value. So there will be some holes in the | |
4120 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4121 | * called. | |
4122 | */ | |
4123 | xe = &xh->xh_entries[start]; | |
4124 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
4125 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
4126 | (int)((char *)xe - (char *)xh), |
4127 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4128 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4129 | xe = &xh->xh_entries[count - start]; | |
4130 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4131 | memset((char *)xe, 0, len); | |
4132 | ||
4133 | le16_add_cpu(&xh->xh_count, -start); | |
4134 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4135 | ||
4136 | /* Calculate xh_free_start for the new bucket. */ | |
4137 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4138 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4139 | xe = &xh->xh_entries[i]; | |
4140 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4141 | if (ocfs2_xattr_is_local(xe)) | |
4142 | xe_len += | |
4143 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4144 | else | |
4145 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4146 | if (le16_to_cpu(xe->xe_name_offset) < | |
4147 | le16_to_cpu(xh->xh_free_start)) | |
4148 | xh->xh_free_start = xe->xe_name_offset; | |
4149 | } | |
4150 | ||
80bcaf34 | 4151 | set_num_buckets: |
01225596 TM |
4152 | /* set xh->xh_num_buckets for the new xh. */ |
4153 | if (new_bucket_head) | |
4154 | xh->xh_num_buckets = cpu_to_le16(1); | |
4155 | else | |
4156 | xh->xh_num_buckets = 0; | |
4157 | ||
ba937127 | 4158 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4159 | |
4160 | /* store the first_hash of the new bucket. */ | |
4161 | if (first_hash) | |
4162 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4163 | ||
4164 | /* | |
80bcaf34 TM |
4165 | * Now only update the 1st block of the old bucket. If we |
4166 | * just added a new empty bucket, there is no need to modify | |
4167 | * it. | |
01225596 | 4168 | */ |
80bcaf34 TM |
4169 | if (start == count) |
4170 | goto out; | |
4171 | ||
ba937127 | 4172 | xh = bucket_xh(s_bucket); |
01225596 TM |
4173 | memset(&xh->xh_entries[start], 0, |
4174 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4175 | xh->xh_count = cpu_to_le16(start); | |
4176 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4177 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4178 | ||
ba937127 | 4179 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4180 | |
4181 | out: | |
ba937127 JB |
4182 | ocfs2_xattr_bucket_free(s_bucket); |
4183 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4184 | |
4185 | return ret; | |
4186 | } | |
4187 | ||
4188 | /* | |
4189 | * Copy xattr from one bucket to another bucket. | |
4190 | * | |
4191 | * The caller must make sure that the journal transaction | |
4192 | * has enough space for journaling. | |
4193 | */ | |
4194 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4195 | handle_t *handle, | |
4196 | u64 s_blkno, | |
4197 | u64 t_blkno, | |
4198 | int t_is_new) | |
4199 | { | |
4980c6da | 4200 | int ret; |
ba937127 | 4201 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4202 | |
4203 | BUG_ON(s_blkno == t_blkno); | |
4204 | ||
4205 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
4206 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
4207 | t_is_new); | |
01225596 | 4208 | |
ba937127 JB |
4209 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4210 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4211 | if (!s_bucket || !t_bucket) { | |
4212 | ret = -ENOMEM; | |
4213 | mlog_errno(ret); | |
4214 | goto out; | |
4215 | } | |
92de109a | 4216 | |
ba937127 | 4217 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4218 | if (ret) |
4219 | goto out; | |
4220 | ||
784b816a JB |
4221 | /* |
4222 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4223 | * there's no need to read it. | |
4224 | */ | |
ba937127 | 4225 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
4226 | if (ret) |
4227 | goto out; | |
4228 | ||
2b656c1d JB |
4229 | /* |
4230 | * Hey, if we're overwriting t_bucket, what difference does | |
4231 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4232 | * cluster to fill, we came here from |
4233 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4234 | * ACCESS_CREATE is required. But we also might have moved data | |
4235 | * out of t_bucket before extending back into it. | |
4236 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4237 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4238 | * and copied out the end of the old extent. Then it re-extends |
4239 | * the old extent back to create space for new xattrs. That's | |
4240 | * how we get here, and the bucket isn't really new. | |
4241 | */ | |
ba937127 | 4242 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4243 | t_is_new ? |
4244 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4245 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4246 | if (ret) | |
4247 | goto out; | |
01225596 | 4248 | |
ba937127 JB |
4249 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4250 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4251 | |
4252 | out: | |
ba937127 JB |
4253 | ocfs2_xattr_bucket_free(t_bucket); |
4254 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4255 | |
4256 | return ret; | |
4257 | } | |
4258 | ||
4259 | /* | |
874d65af JB |
4260 | * src_blk points to the start of an existing extent. last_blk points to |
4261 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4262 | * extent. We copy the buckets from the cluster at last_blk to the new |
4263 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4264 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4265 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4266 | * by the same amount. | |
01225596 | 4267 | */ |
54ecb6b6 JB |
4268 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4269 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4270 | unsigned int start_bucket, | |
4271 | u32 *first_hash) | |
01225596 TM |
4272 | { |
4273 | int i, ret, credits; | |
4274 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4275 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4276 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4277 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4278 | |
874d65af JB |
4279 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4280 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4281 | |
54ecb6b6 JB |
4282 | BUG_ON(start_bucket >= num_buckets); |
4283 | if (start_bucket) { | |
4284 | num_buckets -= start_bucket; | |
4285 | last_blk += (start_bucket * blks_per_bucket); | |
4286 | } | |
4287 | ||
15d60929 JB |
4288 | /* The first bucket of the original extent */ |
4289 | old_first = ocfs2_xattr_bucket_new(inode); | |
4290 | /* The first bucket of the new extent */ | |
4291 | new_first = ocfs2_xattr_bucket_new(inode); | |
4292 | if (!old_first || !new_first) { | |
4293 | ret = -ENOMEM; | |
4294 | mlog_errno(ret); | |
4295 | goto out; | |
4296 | } | |
4297 | ||
874d65af | 4298 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4299 | if (ret) { |
4300 | mlog_errno(ret); | |
4301 | goto out; | |
4302 | } | |
4303 | ||
01225596 | 4304 | /* |
54ecb6b6 JB |
4305 | * We need to update the first bucket of the old extent and all |
4306 | * the buckets going to the new extent. | |
01225596 | 4307 | */ |
54ecb6b6 JB |
4308 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4309 | handle->h_buffer_credits; | |
01225596 TM |
4310 | ret = ocfs2_extend_trans(handle, credits); |
4311 | if (ret) { | |
4312 | mlog_errno(ret); | |
4313 | goto out; | |
4314 | } | |
4315 | ||
15d60929 JB |
4316 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4317 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4318 | if (ret) { |
4319 | mlog_errno(ret); | |
4320 | goto out; | |
4321 | } | |
4322 | ||
4323 | for (i = 0; i < num_buckets; i++) { | |
4324 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4325 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4326 | to_blk + (i * blks_per_bucket), |
4327 | 1); | |
01225596 TM |
4328 | if (ret) { |
4329 | mlog_errno(ret); | |
4330 | goto out; | |
4331 | } | |
01225596 TM |
4332 | } |
4333 | ||
15d60929 JB |
4334 | /* |
4335 | * Get the new bucket ready before we dirty anything | |
4336 | * (This actually shouldn't fail, because we already dirtied | |
4337 | * it once in ocfs2_cp_xattr_bucket()). | |
4338 | */ | |
4339 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4340 | if (ret) { | |
01225596 TM |
4341 | mlog_errno(ret); |
4342 | goto out; | |
4343 | } | |
15d60929 JB |
4344 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4345 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4346 | if (ret) { |
4347 | mlog_errno(ret); | |
4348 | goto out; | |
4349 | } | |
4350 | ||
15d60929 JB |
4351 | /* Now update the headers */ |
4352 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4353 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4354 | |
15d60929 JB |
4355 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4356 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4357 | |
4358 | if (first_hash) | |
15d60929 JB |
4359 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4360 | ||
01225596 | 4361 | out: |
15d60929 JB |
4362 | ocfs2_xattr_bucket_free(new_first); |
4363 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4364 | return ret; |
4365 | } | |
4366 | ||
4367 | /* | |
80bcaf34 | 4368 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4369 | * This function should only be called when bucket size == cluster size. |
4370 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4371 | */ | |
80bcaf34 TM |
4372 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4373 | handle_t *handle, | |
4374 | u64 prev_blk, | |
4375 | u64 new_blk, | |
4376 | u32 *first_hash) | |
01225596 TM |
4377 | { |
4378 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4379 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4380 | |
4381 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4382 | ||
4383 | ret = ocfs2_extend_trans(handle, credits); | |
4384 | if (ret) { | |
4385 | mlog_errno(ret); | |
4386 | return ret; | |
4387 | } | |
4388 | ||
4389 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4390 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4391 | new_blk, first_hash, 1); | |
01225596 TM |
4392 | } |
4393 | ||
4394 | /* | |
4395 | * Move some xattrs from the old cluster to the new one since they are not | |
4396 | * contiguous in ocfs2 xattr tree. | |
4397 | * | |
4398 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4399 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4400 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4401 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4402 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4403 | * to extend the insert bucket. | |
4404 | * | |
4405 | * The problem is how much xattr should we move to the new one and when should | |
4406 | * we update first_bh and header_bh? | |
4407 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4408 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4409 | * update the first_bh and header_bh if the insert bucket has been moved | |
4410 | * to the new cluster. | |
4411 | * 2. If cluster_size == bucket_size: | |
4412 | * a) If the previous extent rec has more than one cluster and the insert | |
4413 | * place isn't in the last cluster, copy the entire last cluster to the | |
4414 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4415 | * since they will not be moved into the new cluster. | |
4416 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4417 | * the new one. And we set the extend flag to zero if the insert place is | |
4418 | * moved into the new allocated cluster since no extend is needed. | |
4419 | */ | |
4420 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4421 | handle_t *handle, | |
012ee910 JB |
4422 | struct ocfs2_xattr_bucket *first, |
4423 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4424 | u64 new_blk, |
01225596 TM |
4425 | u32 prev_clusters, |
4426 | u32 *v_start, | |
4427 | int *extend) | |
4428 | { | |
92cf3adf | 4429 | int ret; |
01225596 TM |
4430 | |
4431 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4432 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4433 | (unsigned long long)new_blk); |
01225596 | 4434 | |
41cb8148 | 4435 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4436 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4437 | handle, | |
41cb8148 | 4438 | first, target, |
01225596 | 4439 | new_blk, |
01225596 TM |
4440 | prev_clusters, |
4441 | v_start); | |
012ee910 | 4442 | if (ret) |
41cb8148 | 4443 | mlog_errno(ret); |
41cb8148 | 4444 | } else { |
92cf3adf JB |
4445 | /* The start of the last cluster in the first extent */ |
4446 | u64 last_blk = bucket_blkno(first) + | |
4447 | ((prev_clusters - 1) * | |
4448 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4449 | |
012ee910 | 4450 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4451 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4452 | bucket_blkno(first), |
54ecb6b6 | 4453 | last_blk, new_blk, 0, |
01225596 | 4454 | v_start); |
012ee910 JB |
4455 | if (ret) |
4456 | mlog_errno(ret); | |
4457 | } else { | |
80bcaf34 TM |
4458 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4459 | last_blk, new_blk, | |
4460 | v_start); | |
012ee910 JB |
4461 | if (ret) |
4462 | mlog_errno(ret); | |
01225596 | 4463 | |
92cf3adf | 4464 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4465 | *extend = 0; |
4466 | } | |
4467 | } | |
4468 | ||
4469 | return ret; | |
4470 | } | |
4471 | ||
4472 | /* | |
4473 | * Add a new cluster for xattr storage. | |
4474 | * | |
4475 | * If the new cluster is contiguous with the previous one, it will be | |
4476 | * appended to the same extent record, and num_clusters will be updated. | |
4477 | * If not, we will insert a new extent for it and move some xattrs in | |
4478 | * the last cluster into the new allocated one. | |
4479 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4480 | * lose the benefits of hashing because we'll have to search large leaves. | |
4481 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4482 | * if it's bigger). | |
4483 | * | |
4484 | * first_bh is the first block of the previous extent rec and header_bh | |
4485 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4486 | * when the header_bh is moved into the new cluster. | |
4487 | */ | |
4488 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4489 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4490 | struct ocfs2_xattr_bucket *first, |
4491 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4492 | u32 *num_clusters, |
4493 | u32 prev_cpos, | |
78f30c31 TM |
4494 | int *extend, |
4495 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4496 | { |
85db90e7 | 4497 | int ret; |
01225596 TM |
4498 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4499 | u32 prev_clusters = *num_clusters; | |
4500 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4501 | u64 block; | |
85db90e7 | 4502 | handle_t *handle = ctxt->handle; |
01225596 | 4503 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4504 | struct ocfs2_extent_tree et; |
01225596 TM |
4505 | |
4506 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4507 | "previous xattr blkno = %llu\n", | |
4508 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4509 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4510 | |
5e404e9e | 4511 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 4512 | |
0cf2f763 | 4513 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4514 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4515 | if (ret < 0) { |
4516 | mlog_errno(ret); | |
4517 | goto leave; | |
4518 | } | |
4519 | ||
78f30c31 | 4520 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4521 | clusters_to_add, &bit_off, &num_bits); |
4522 | if (ret < 0) { | |
4523 | if (ret != -ENOSPC) | |
4524 | mlog_errno(ret); | |
4525 | goto leave; | |
4526 | } | |
4527 | ||
4528 | BUG_ON(num_bits > clusters_to_add); | |
4529 | ||
4530 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4531 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4532 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4533 | ||
ed29c0ca | 4534 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4535 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4536 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4537 | /* | |
4538 | * If this cluster is contiguous with the old one and | |
4539 | * adding this new cluster, we don't surpass the limit of | |
4540 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4541 | * initialized and used like other buckets in the previous | |
4542 | * cluster. | |
4543 | * So add it as a contiguous one. The caller will handle | |
4544 | * its init process. | |
4545 | */ | |
4546 | v_start = prev_cpos + prev_clusters; | |
4547 | *num_clusters = prev_clusters + num_bits; | |
4548 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4549 | num_bits); | |
4550 | } else { | |
4551 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4552 | handle, | |
012ee910 JB |
4553 | first, |
4554 | target, | |
01225596 | 4555 | block, |
01225596 TM |
4556 | prev_clusters, |
4557 | &v_start, | |
4558 | extend); | |
4559 | if (ret) { | |
4560 | mlog_errno(ret); | |
4561 | goto leave; | |
4562 | } | |
4563 | } | |
4564 | ||
4565 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4566 | num_bits, (unsigned long long)block, v_start); |
cc79d8c1 | 4567 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 4568 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4569 | if (ret < 0) { |
4570 | mlog_errno(ret); | |
4571 | goto leave; | |
4572 | } | |
4573 | ||
4574 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4575 | if (ret < 0) |
01225596 | 4576 | mlog_errno(ret); |
01225596 TM |
4577 | |
4578 | leave: | |
01225596 TM |
4579 | return ret; |
4580 | } | |
4581 | ||
4582 | /* | |
92de109a JB |
4583 | * We are given an extent. 'first' is the bucket at the very front of |
4584 | * the extent. The extent has space for an additional bucket past | |
4585 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4586 | * of the target bucket. We wish to shift every bucket past the target | |
4587 | * down one, filling in that additional space. When we get back to the | |
4588 | * target, we split the target between itself and the now-empty bucket | |
4589 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4590 | */ |
4591 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4592 | handle_t *handle, |
92de109a JB |
4593 | struct ocfs2_xattr_bucket *first, |
4594 | u64 target_blk, | |
01225596 TM |
4595 | u32 num_clusters) |
4596 | { | |
4597 | int ret, credits; | |
4598 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4599 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4600 | u64 end_blk; |
4601 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4602 | |
4603 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4604 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4605 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4606 | |
92de109a JB |
4607 | /* The extent must have room for an additional bucket */ |
4608 | BUG_ON(new_bucket >= | |
4609 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4610 | |
92de109a JB |
4611 | /* end_blk points to the last existing bucket */ |
4612 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4613 | |
4614 | /* | |
92de109a JB |
4615 | * end_blk is the start of the last existing bucket. |
4616 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4617 | * every bucket after it up to, but not including, the last | |
4618 | * existing bucket. Then we add the last existing bucket, the | |
4619 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4620 | */ |
92de109a | 4621 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4622 | handle->h_buffer_credits; |
4623 | ret = ocfs2_extend_trans(handle, credits); | |
4624 | if (ret) { | |
01225596 TM |
4625 | mlog_errno(ret); |
4626 | goto out; | |
4627 | } | |
4628 | ||
92de109a JB |
4629 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4630 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4631 | if (ret) { |
4632 | mlog_errno(ret); | |
85db90e7 | 4633 | goto out; |
01225596 TM |
4634 | } |
4635 | ||
92de109a | 4636 | while (end_blk != target_blk) { |
01225596 TM |
4637 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4638 | end_blk + blk_per_bucket, 0); | |
4639 | if (ret) | |
85db90e7 | 4640 | goto out; |
01225596 TM |
4641 | end_blk -= blk_per_bucket; |
4642 | } | |
4643 | ||
92de109a JB |
4644 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4645 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4646 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4647 | |
92de109a JB |
4648 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4649 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4650 | |
01225596 TM |
4651 | out: |
4652 | return ret; | |
4653 | } | |
4654 | ||
4655 | /* | |
91f2033f JB |
4656 | * Add new xattr bucket in an extent record and adjust the buckets |
4657 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4658 | * bucket we want to insert into. | |
01225596 | 4659 | * |
91f2033f JB |
4660 | * In the easy case, we will move all the buckets after target down by |
4661 | * one. Half of target's xattrs will be moved to the next bucket. | |
4662 | * | |
4663 | * If current cluster is full, we'll allocate a new one. This may not | |
4664 | * be contiguous. The underlying calls will make sure that there is | |
4665 | * space for the insert, shifting buckets around if necessary. | |
4666 | * 'target' may be moved by those calls. | |
01225596 TM |
4667 | */ |
4668 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4669 | struct buffer_head *xb_bh, | |
91f2033f | 4670 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4671 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4672 | { |
01225596 TM |
4673 | struct ocfs2_xattr_block *xb = |
4674 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4675 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4676 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4677 | u32 name_hash = |
4678 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4679 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4680 | int ret, num_buckets, extend = 1; |
4681 | u64 p_blkno; | |
4682 | u32 e_cpos, num_clusters; | |
92de109a | 4683 | /* The bucket at the front of the extent */ |
91f2033f | 4684 | struct ocfs2_xattr_bucket *first; |
01225596 | 4685 | |
91f2033f JB |
4686 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4687 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4688 | |
ed29c0ca | 4689 | /* The first bucket of the original extent */ |
92de109a | 4690 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4691 | if (!first) { |
92de109a JB |
4692 | ret = -ENOMEM; |
4693 | mlog_errno(ret); | |
4694 | goto out; | |
4695 | } | |
4696 | ||
01225596 TM |
4697 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4698 | &num_clusters, el); | |
4699 | if (ret) { | |
4700 | mlog_errno(ret); | |
4701 | goto out; | |
4702 | } | |
4703 | ||
ed29c0ca | 4704 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4705 | if (ret) { |
4706 | mlog_errno(ret); | |
4707 | goto out; | |
4708 | } | |
4709 | ||
ed29c0ca JB |
4710 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4711 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4712 | /* | |
4713 | * This can move first+target if the target bucket moves | |
4714 | * to the new extent. | |
4715 | */ | |
01225596 TM |
4716 | ret = ocfs2_add_new_xattr_cluster(inode, |
4717 | xb_bh, | |
ed29c0ca JB |
4718 | first, |
4719 | target, | |
01225596 TM |
4720 | &num_clusters, |
4721 | e_cpos, | |
78f30c31 TM |
4722 | &extend, |
4723 | ctxt); | |
01225596 TM |
4724 | if (ret) { |
4725 | mlog_errno(ret); | |
4726 | goto out; | |
4727 | } | |
4728 | } | |
4729 | ||
92de109a | 4730 | if (extend) { |
01225596 | 4731 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4732 | ctxt->handle, |
ed29c0ca JB |
4733 | first, |
4734 | bucket_blkno(target), | |
01225596 | 4735 | num_clusters); |
92de109a JB |
4736 | if (ret) |
4737 | mlog_errno(ret); | |
4738 | } | |
4739 | ||
01225596 | 4740 | out: |
92de109a | 4741 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4742 | |
01225596 TM |
4743 | return ret; |
4744 | } | |
4745 | ||
4746 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4747 | struct ocfs2_xattr_bucket *bucket, | |
4748 | int offs) | |
4749 | { | |
4750 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4751 | ||
4752 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4753 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4754 | } |
4755 | ||
4756 | /* | |
4757 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4758 | * |
4759 | * Note: "local" indicates the real data's locality. So we can't | |
4760 | * just its bucket locality by its length. | |
4761 | */ | |
4762 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4763 | struct ocfs2_xattr_info *xi, | |
4764 | struct ocfs2_xattr_search *xs, | |
4765 | u32 name_hash, | |
5a095611 | 4766 | int local) |
01225596 TM |
4767 | { |
4768 | struct ocfs2_xattr_entry *last, *xe; | |
4769 | int name_len = strlen(xi->name); | |
4770 | struct ocfs2_xattr_header *xh = xs->header; | |
4771 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4772 | size_t blocksize = inode->i_sb->s_blocksize; | |
4773 | char *val; | |
4774 | size_t offs, size, new_size; | |
4775 | ||
4776 | last = &xh->xh_entries[count]; | |
4777 | if (!xs->not_found) { | |
4778 | xe = xs->here; | |
4779 | offs = le16_to_cpu(xe->xe_name_offset); | |
4780 | if (ocfs2_xattr_is_local(xe)) | |
4781 | size = OCFS2_XATTR_SIZE(name_len) + | |
4782 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4783 | else | |
4784 | size = OCFS2_XATTR_SIZE(name_len) + | |
4785 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
4786 | ||
4787 | /* | |
4788 | * If the new value will be stored outside, xi->value has been | |
4789 | * initalized as an empty ocfs2_xattr_value_root, and the same | |
4790 | * goes with xi->value_len, so we can set new_size safely here. | |
4791 | * See ocfs2_xattr_set_in_bucket. | |
4792 | */ | |
4793 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
4794 | OCFS2_XATTR_SIZE(xi->value_len); | |
4795 | ||
4796 | le16_add_cpu(&xh->xh_name_value_len, -size); | |
4797 | if (xi->value) { | |
4798 | if (new_size > size) | |
4799 | goto set_new_name_value; | |
4800 | ||
4801 | /* Now replace the old value with new one. */ | |
4802 | if (local) | |
4803 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4804 | else | |
4805 | xe->xe_value_size = 0; | |
4806 | ||
4807 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 4808 | xs->bucket, offs); |
01225596 TM |
4809 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
4810 | size - OCFS2_XATTR_SIZE(name_len)); | |
4811 | if (OCFS2_XATTR_SIZE(xi->value_len) > 0) | |
4812 | memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
4813 | xi->value, xi->value_len); | |
4814 | ||
4815 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
4816 | ocfs2_xattr_set_local(xe, local); | |
4817 | return; | |
4818 | } else { | |
5a095611 TM |
4819 | /* |
4820 | * Remove the old entry if there is more than one. | |
4821 | * We don't remove the last entry so that we can | |
4822 | * use it to indicate the hash value of the empty | |
4823 | * bucket. | |
4824 | */ | |
01225596 | 4825 | last -= 1; |
01225596 | 4826 | le16_add_cpu(&xh->xh_count, -1); |
5a095611 TM |
4827 | if (xh->xh_count) { |
4828 | memmove(xe, xe + 1, | |
4829 | (void *)last - (void *)xe); | |
4830 | memset(last, 0, | |
4831 | sizeof(struct ocfs2_xattr_entry)); | |
4832 | } else | |
4833 | xh->xh_free_start = | |
4834 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4835 | ||
01225596 TM |
4836 | return; |
4837 | } | |
4838 | } else { | |
4839 | /* find a new entry for insert. */ | |
4840 | int low = 0, high = count - 1, tmp; | |
4841 | struct ocfs2_xattr_entry *tmp_xe; | |
4842 | ||
5a095611 | 4843 | while (low <= high && count) { |
01225596 TM |
4844 | tmp = (low + high) / 2; |
4845 | tmp_xe = &xh->xh_entries[tmp]; | |
4846 | ||
4847 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
4848 | low = tmp + 1; | |
4849 | else if (name_hash < | |
4850 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
4851 | high = tmp - 1; | |
06b240d8 TM |
4852 | else { |
4853 | low = tmp; | |
01225596 | 4854 | break; |
06b240d8 | 4855 | } |
01225596 TM |
4856 | } |
4857 | ||
4858 | xe = &xh->xh_entries[low]; | |
4859 | if (low != count) | |
4860 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
4861 | ||
4862 | le16_add_cpu(&xh->xh_count, 1); | |
4863 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
4864 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
4865 | xe->xe_name_len = name_len; | |
4866 | ocfs2_xattr_set_type(xe, xi->name_index); | |
4867 | } | |
4868 | ||
4869 | set_new_name_value: | |
4870 | /* Insert the new name+value. */ | |
4871 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); | |
4872 | ||
4873 | /* | |
4874 | * We must make sure that the name/value pair | |
4875 | * exists in the same block. | |
4876 | */ | |
4877 | offs = le16_to_cpu(xh->xh_free_start); | |
4878 | start = offs - size; | |
4879 | ||
4880 | if (start >> inode->i_sb->s_blocksize_bits != | |
4881 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
4882 | offs = offs - offs % blocksize; | |
4883 | xh->xh_free_start = cpu_to_le16(offs); | |
4884 | } | |
4885 | ||
ba937127 | 4886 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
4887 | xe->xe_name_offset = cpu_to_le16(offs - size); |
4888 | ||
4889 | memset(val, 0, size); | |
4890 | memcpy(val, xi->name, name_len); | |
4891 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); | |
4892 | ||
4893 | xe->xe_value_size = cpu_to_le64(xi->value_len); | |
4894 | ocfs2_xattr_set_local(xe, local); | |
4895 | xs->here = xe; | |
4896 | le16_add_cpu(&xh->xh_free_start, -size); | |
4897 | le16_add_cpu(&xh->xh_name_value_len, size); | |
4898 | ||
4899 | return; | |
4900 | } | |
4901 | ||
01225596 TM |
4902 | /* |
4903 | * Set the xattr entry in the specified bucket. | |
4904 | * The bucket is indicated by xs->bucket and it should have the enough | |
4905 | * space for the xattr insertion. | |
4906 | */ | |
4907 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 4908 | handle_t *handle, |
01225596 TM |
4909 | struct ocfs2_xattr_info *xi, |
4910 | struct ocfs2_xattr_search *xs, | |
4911 | u32 name_hash, | |
5a095611 | 4912 | int local) |
01225596 | 4913 | { |
1224be02 | 4914 | int ret; |
02dbf38d | 4915 | u64 blkno; |
01225596 | 4916 | |
ff1ec20e MF |
4917 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
4918 | (unsigned long)xi->value_len, xi->name_index, | |
ba937127 | 4919 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 4920 | |
ba937127 | 4921 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
4922 | blkno = bucket_blkno(xs->bucket); |
4923 | ocfs2_xattr_bucket_relse(xs->bucket); | |
4924 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
4925 | if (ret) { |
4926 | mlog_errno(ret); | |
4927 | goto out; | |
4928 | } | |
4929 | } | |
4930 | ||
ba937127 | 4931 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
4932 | OCFS2_JOURNAL_ACCESS_WRITE); |
4933 | if (ret < 0) { | |
4934 | mlog_errno(ret); | |
4935 | goto out; | |
01225596 TM |
4936 | } |
4937 | ||
5a095611 | 4938 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 4939 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 4940 | |
01225596 | 4941 | out: |
01225596 TM |
4942 | return ret; |
4943 | } | |
4944 | ||
01225596 TM |
4945 | /* |
4946 | * Truncate the specified xe_off entry in xattr bucket. | |
4947 | * bucket is indicated by header_bh and len is the new length. | |
4948 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
4949 | * | |
4950 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
4951 | */ | |
4952 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 4953 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 4954 | int xe_off, |
78f30c31 TM |
4955 | int len, |
4956 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
4957 | { |
4958 | int ret, offset; | |
4959 | u64 value_blk; | |
01225596 | 4960 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 4961 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4962 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
4963 | struct ocfs2_xattr_value_buf vb = { |
4964 | .vb_access = ocfs2_journal_access, | |
4965 | }; | |
01225596 TM |
4966 | |
4967 | xe = &xh->xh_entries[xe_off]; | |
4968 | ||
4969 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
4970 | ||
4971 | offset = le16_to_cpu(xe->xe_name_offset) + | |
4972 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4973 | ||
4974 | value_blk = offset / blocksize; | |
4975 | ||
4976 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
4977 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 4978 | |
b3e5d379 JB |
4979 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
4980 | BUG_ON(!vb.vb_bh); | |
01225596 | 4981 | |
b3e5d379 JB |
4982 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
4983 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 4984 | |
548b0f22 JB |
4985 | /* |
4986 | * From here on out we have to dirty the bucket. The generic | |
4987 | * value calls only modify one of the bucket's bhs, but we need | |
4988 | * to send the bucket at once. So if they error, they *could* have | |
4989 | * modified something. We have to assume they did, and dirty | |
4990 | * the whole bucket. This leaves us in a consistent state. | |
4991 | */ | |
4992 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
4993 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 4994 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
4995 | if (ret) { |
4996 | mlog_errno(ret); | |
554e7f9e TM |
4997 | goto out; |
4998 | } | |
4999 | ||
5000 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5001 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5002 | if (ret) { | |
5003 | mlog_errno(ret); | |
5004 | goto out; | |
01225596 TM |
5005 | } |
5006 | ||
548b0f22 JB |
5007 | xe->xe_value_size = cpu_to_le64(len); |
5008 | ||
548b0f22 JB |
5009 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5010 | ||
01225596 | 5011 | out: |
01225596 TM |
5012 | return ret; |
5013 | } | |
5014 | ||
5015 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
5016 | struct ocfs2_xattr_search *xs, |
5017 | int len, | |
5018 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5019 | { |
5020 | int ret, offset; | |
5021 | struct ocfs2_xattr_entry *xe = xs->here; | |
5022 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
5023 | ||
ba937127 | 5024 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
5025 | |
5026 | offset = xe - xh->xh_entries; | |
548b0f22 | 5027 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 5028 | offset, len, ctxt); |
01225596 TM |
5029 | if (ret) |
5030 | mlog_errno(ret); | |
5031 | ||
5032 | return ret; | |
5033 | } | |
5034 | ||
5035 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 5036 | handle_t *handle, |
01225596 TM |
5037 | struct ocfs2_xattr_search *xs, |
5038 | char *val, | |
5039 | int value_len) | |
5040 | { | |
712e53e4 | 5041 | int ret, offset, block_off; |
01225596 TM |
5042 | struct ocfs2_xattr_value_root *xv; |
5043 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
5044 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
5045 | void *base; | |
492a8a33 TM |
5046 | struct ocfs2_xattr_value_buf vb = { |
5047 | .vb_access = ocfs2_journal_access, | |
5048 | }; | |
01225596 TM |
5049 | |
5050 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
5051 | ||
fd68a894 | 5052 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, xh, |
712e53e4 TM |
5053 | xe - xh->xh_entries, |
5054 | &block_off, | |
5055 | &offset); | |
5056 | if (ret) { | |
5057 | mlog_errno(ret); | |
5058 | goto out; | |
5059 | } | |
01225596 | 5060 | |
712e53e4 TM |
5061 | base = bucket_block(xs->bucket, block_off); |
5062 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
5063 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 5064 | |
492a8a33 TM |
5065 | vb.vb_xv = xv; |
5066 | vb.vb_bh = xs->bucket->bu_bhs[block_off]; | |
712e53e4 | 5067 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
492a8a33 | 5068 | &vb, val, value_len); |
712e53e4 TM |
5069 | if (ret) |
5070 | mlog_errno(ret); | |
5071 | out: | |
5072 | return ret; | |
01225596 TM |
5073 | } |
5074 | ||
01225596 TM |
5075 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5076 | struct buffer_head *root_bh, | |
5077 | u64 blkno, | |
5078 | u32 cpos, | |
47bca495 TM |
5079 | u32 len, |
5080 | void *para) | |
01225596 TM |
5081 | { |
5082 | int ret; | |
5083 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5084 | struct inode *tl_inode = osb->osb_tl_inode; | |
5085 | handle_t *handle; | |
5086 | struct ocfs2_xattr_block *xb = | |
5087 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5088 | struct ocfs2_alloc_context *meta_ac = NULL; |
5089 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5090 | struct ocfs2_extent_tree et; |
5091 | ||
47bca495 | 5092 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5093 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5094 | if (ret) { |
5095 | mlog_errno(ret); | |
5096 | return ret; | |
5097 | } | |
5098 | ||
5e404e9e | 5099 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5100 | |
5101 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5102 | ||
5103 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
5104 | cpos, len, (unsigned long long)blkno); | |
5105 | ||
8cb471e8 JB |
5106 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5107 | len); | |
01225596 | 5108 | |
f99b9b7c | 5109 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5110 | if (ret) { |
5111 | mlog_errno(ret); | |
5112 | return ret; | |
5113 | } | |
5114 | ||
5115 | mutex_lock(&tl_inode->i_mutex); | |
5116 | ||
5117 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5118 | ret = __ocfs2_flush_truncate_log(osb); | |
5119 | if (ret < 0) { | |
5120 | mlog_errno(ret); | |
5121 | goto out; | |
5122 | } | |
5123 | } | |
5124 | ||
a90714c1 | 5125 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5126 | if (IS_ERR(handle)) { |
01225596 TM |
5127 | ret = -ENOMEM; |
5128 | mlog_errno(ret); | |
5129 | goto out; | |
5130 | } | |
5131 | ||
0cf2f763 | 5132 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5133 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5134 | if (ret) { |
5135 | mlog_errno(ret); | |
5136 | goto out_commit; | |
5137 | } | |
5138 | ||
dbdcf6a4 | 5139 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5140 | &dealloc); |
01225596 TM |
5141 | if (ret) { |
5142 | mlog_errno(ret); | |
5143 | goto out_commit; | |
5144 | } | |
5145 | ||
5146 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
5147 | ||
5148 | ret = ocfs2_journal_dirty(handle, root_bh); | |
5149 | if (ret) { | |
5150 | mlog_errno(ret); | |
5151 | goto out_commit; | |
5152 | } | |
5153 | ||
5154 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5155 | if (ret) | |
5156 | mlog_errno(ret); | |
5157 | ||
5158 | out_commit: | |
5159 | ocfs2_commit_trans(osb, handle); | |
5160 | out: | |
5161 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5162 | ||
5163 | mutex_unlock(&tl_inode->i_mutex); | |
5164 | ||
5165 | if (meta_ac) | |
5166 | ocfs2_free_alloc_context(meta_ac); | |
5167 | ||
5168 | ocfs2_run_deallocs(osb, &dealloc); | |
5169 | ||
5170 | return ret; | |
5171 | } | |
5172 | ||
01225596 | 5173 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 5174 | handle_t *handle, |
01225596 TM |
5175 | struct ocfs2_xattr_search *xs) |
5176 | { | |
ba937127 | 5177 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
5178 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
5179 | le16_to_cpu(xh->xh_count) - 1]; | |
5180 | int ret = 0; | |
5181 | ||
ba937127 | 5182 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 5183 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5184 | if (ret) { |
5185 | mlog_errno(ret); | |
85db90e7 | 5186 | return; |
01225596 TM |
5187 | } |
5188 | ||
5189 | /* Remove the old entry. */ | |
5190 | memmove(xs->here, xs->here + 1, | |
5191 | (void *)last - (void *)xs->here); | |
5192 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
5193 | le16_add_cpu(&xh->xh_count, -1); | |
5194 | ||
ba937127 | 5195 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
5196 | } |
5197 | ||
5198 | /* | |
5199 | * Set the xattr name/value in the bucket specified in xs. | |
5200 | * | |
5201 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
5202 | * we divide the whole process into 3 steps: | |
5203 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
5204 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
5205 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
5206 | * 4. If the clusters for the new outside value can't be allocated, we need | |
5207 | * to free the xattr we allocated in set. | |
5208 | */ | |
5209 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
5210 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5211 | struct ocfs2_xattr_search *xs, |
5212 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5213 | { |
5a095611 | 5214 | int ret, local = 1; |
01225596 TM |
5215 | size_t value_len; |
5216 | char *val = (char *)xi->value; | |
5217 | struct ocfs2_xattr_entry *xe = xs->here; | |
2057e5c6 TM |
5218 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, |
5219 | strlen(xi->name)); | |
01225596 TM |
5220 | |
5221 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
5222 | /* | |
5223 | * We need to truncate the xattr storage first. | |
5224 | * | |
5225 | * If both the old and new value are stored to | |
5226 | * outside block, we only need to truncate | |
5227 | * the storage and then set the value outside. | |
5228 | * | |
5229 | * If the new value should be stored within block, | |
5230 | * we should free all the outside block first and | |
5231 | * the modification to the xattr block will be done | |
5232 | * by following steps. | |
5233 | */ | |
5234 | if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5235 | value_len = xi->value_len; | |
5236 | else | |
5237 | value_len = 0; | |
5238 | ||
5239 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
5240 | value_len, |
5241 | ctxt); | |
01225596 TM |
5242 | if (ret) |
5243 | goto out; | |
5244 | ||
5245 | if (value_len) | |
5246 | goto set_value_outside; | |
5247 | } | |
5248 | ||
5249 | value_len = xi->value_len; | |
5250 | /* So we have to handle the inside block change now. */ | |
5251 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
5252 | /* | |
5253 | * If the new value will be stored outside of block, | |
5254 | * initalize a new empty value root and insert it first. | |
5255 | */ | |
5256 | local = 0; | |
5257 | xi->value = &def_xv; | |
5258 | xi->value_len = OCFS2_XATTR_ROOT_SIZE; | |
5259 | } | |
5260 | ||
85db90e7 TM |
5261 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5262 | name_hash, local); | |
01225596 TM |
5263 | if (ret) { |
5264 | mlog_errno(ret); | |
5265 | goto out; | |
5266 | } | |
5267 | ||
5a095611 TM |
5268 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5269 | goto out; | |
01225596 | 5270 | |
5a095611 TM |
5271 | /* allocate the space now for the outside block storage. */ |
5272 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5273 | value_len, ctxt); |
5a095611 TM |
5274 | if (ret) { |
5275 | mlog_errno(ret); | |
5276 | ||
5277 | if (xs->not_found) { | |
5278 | /* | |
5279 | * We can't allocate enough clusters for outside | |
5280 | * storage and we have allocated xattr already, | |
5281 | * so need to remove it. | |
5282 | */ | |
85db90e7 | 5283 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5284 | } |
01225596 TM |
5285 | goto out; |
5286 | } | |
5287 | ||
5288 | set_value_outside: | |
85db90e7 TM |
5289 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5290 | xs, val, value_len); | |
01225596 TM |
5291 | out: |
5292 | return ret; | |
5293 | } | |
5294 | ||
80bcaf34 TM |
5295 | /* |
5296 | * check whether the xattr bucket is filled up with the same hash value. | |
5297 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5298 | * If we want to insert a xattr with different hash value, go ahead | |
5299 | * and ocfs2_divide_xattr_bucket will handle this. | |
5300 | */ | |
01225596 | 5301 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5302 | struct ocfs2_xattr_bucket *bucket, |
5303 | const char *name) | |
01225596 | 5304 | { |
3e632946 | 5305 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5306 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5307 | ||
5308 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5309 | return 0; | |
01225596 TM |
5310 | |
5311 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5312 | xh->xh_entries[0].xe_name_hash) { | |
5313 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5314 | "hash = %u\n", | |
9c7759aa | 5315 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5316 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5317 | return -ENOSPC; | |
5318 | } | |
5319 | ||
5320 | return 0; | |
5321 | } | |
5322 | ||
5323 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5324 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5325 | struct ocfs2_xattr_search *xs, |
5326 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5327 | { |
5328 | struct ocfs2_xattr_header *xh; | |
5329 | struct ocfs2_xattr_entry *xe; | |
5330 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5331 | int free, max_free, need, old; |
01225596 TM |
5332 | size_t value_size = 0, name_len = strlen(xi->name); |
5333 | size_t blocksize = inode->i_sb->s_blocksize; | |
5334 | int ret, allocation = 0; | |
01225596 TM |
5335 | |
5336 | mlog_entry("Set xattr %s in xattr index block\n", xi->name); | |
5337 | ||
5338 | try_again: | |
5339 | xh = xs->header; | |
5340 | count = le16_to_cpu(xh->xh_count); | |
5341 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5342 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5343 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5344 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5345 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5346 | |
5347 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5348 | "of %u which exceed block size\n", | |
ba937127 | 5349 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5350 | header_size); |
5351 | ||
5352 | if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) | |
5353 | value_size = OCFS2_XATTR_ROOT_SIZE; | |
5354 | else if (xi->value) | |
5355 | value_size = OCFS2_XATTR_SIZE(xi->value_len); | |
5356 | ||
5357 | if (xs->not_found) | |
5358 | need = sizeof(struct ocfs2_xattr_entry) + | |
5359 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5360 | else { | |
5361 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5362 | ||
5363 | /* | |
5364 | * We only replace the old value if the new length is smaller | |
5365 | * than the old one. Otherwise we will allocate new space in the | |
5366 | * bucket to store it. | |
5367 | */ | |
5368 | xe = xs->here; | |
5369 | if (ocfs2_xattr_is_local(xe)) | |
5370 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5371 | else | |
5372 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5373 | ||
5374 | if (old >= value_size) | |
5375 | need = 0; | |
5376 | } | |
5377 | ||
4442f518 | 5378 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5379 | /* |
5380 | * We need to make sure the new name/value pair | |
5381 | * can exist in the same block. | |
5382 | */ | |
5383 | if (xh_free_start % blocksize < need) | |
5384 | free -= xh_free_start % blocksize; | |
5385 | ||
5386 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5387 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5388 | " %u\n", xs->not_found, | |
ba937127 | 5389 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5390 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5391 | le16_to_cpu(xh->xh_name_value_len)); | |
5392 | ||
976331d8 TM |
5393 | if (free < need || |
5394 | (xs->not_found && | |
5395 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5396 | if (need <= max_free && |
5397 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5398 | /* | |
5399 | * We can create the space by defragment. Since only the | |
5400 | * name/value will be moved, the xe shouldn't be changed | |
5401 | * in xs. | |
5402 | */ | |
85db90e7 TM |
5403 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5404 | xs->bucket); | |
01225596 TM |
5405 | if (ret) { |
5406 | mlog_errno(ret); | |
5407 | goto out; | |
5408 | } | |
5409 | ||
5410 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5411 | free = xh_free_start - header_size |
5412 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5413 | if (xh_free_start % blocksize < need) |
5414 | free -= xh_free_start % blocksize; | |
5415 | ||
5416 | if (free >= need) | |
5417 | goto xattr_set; | |
5418 | ||
5419 | mlog(0, "Can't get enough space for xattr insert by " | |
5420 | "defragment. Need %u bytes, but we have %d, so " | |
5421 | "allocate new bucket for it.\n", need, free); | |
5422 | } | |
5423 | ||
5424 | /* | |
5425 | * We have to add new buckets or clusters and one | |
5426 | * allocation should leave us enough space for insert. | |
5427 | */ | |
5428 | BUG_ON(allocation); | |
5429 | ||
5430 | /* | |
5431 | * We do not allow for overlapping ranges between buckets. And | |
5432 | * the maximum number of collisions we will allow for then is | |
5433 | * one bucket's worth, so check it here whether we need to | |
5434 | * add a new bucket for the insert. | |
5435 | */ | |
80bcaf34 | 5436 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5437 | xs->bucket, |
80bcaf34 | 5438 | xi->name); |
01225596 TM |
5439 | if (ret) { |
5440 | mlog_errno(ret); | |
5441 | goto out; | |
5442 | } | |
5443 | ||
5444 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5445 | xs->xattr_bh, | |
91f2033f | 5446 | xs->bucket, |
78f30c31 | 5447 | ctxt); |
01225596 TM |
5448 | if (ret) { |
5449 | mlog_errno(ret); | |
5450 | goto out; | |
5451 | } | |
5452 | ||
91f2033f JB |
5453 | /* |
5454 | * ocfs2_add_new_xattr_bucket() will have updated | |
5455 | * xs->bucket if it moved, but it will not have updated | |
5456 | * any of the other search fields. Thus, we drop it and | |
5457 | * re-search. Everything should be cached, so it'll be | |
5458 | * quick. | |
5459 | */ | |
ba937127 | 5460 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 TM |
5461 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
5462 | xi->name_index, | |
5463 | xi->name, xs); | |
5464 | if (ret && ret != -ENODATA) | |
5465 | goto out; | |
5466 | xs->not_found = ret; | |
5467 | allocation = 1; | |
5468 | goto try_again; | |
5469 | } | |
5470 | ||
5471 | xattr_set: | |
78f30c31 | 5472 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5473 | out: |
5474 | mlog_exit(ret); | |
5475 | return ret; | |
5476 | } | |
a3944256 TM |
5477 | |
5478 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5479 | struct ocfs2_xattr_bucket *bucket, | |
5480 | void *para) | |
5481 | { | |
ce9c5a54 | 5482 | int ret = 0, ref_credits; |
3e632946 | 5483 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5484 | u16 i; |
5485 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5486 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5487 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5488 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5489 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5490 | struct ocfs2_xattr_value_root *xv; |
5491 | struct ocfs2_rm_xattr_bucket_para *args = | |
5492 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5493 | |
5494 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5495 | |
5496 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5497 | xe = &xh->xh_entries[i]; | |
5498 | if (ocfs2_xattr_is_local(xe)) | |
5499 | continue; | |
5500 | ||
ce9c5a54 TM |
5501 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5502 | i, &xv, NULL); | |
5503 | ||
5504 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5505 | args->ref_ci, | |
5506 | args->ref_root_bh, | |
5507 | &ctxt.meta_ac, | |
5508 | &ref_credits); | |
5509 | ||
5510 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5511 | if (IS_ERR(ctxt.handle)) { |
5512 | ret = PTR_ERR(ctxt.handle); | |
5513 | mlog_errno(ret); | |
5514 | break; | |
5515 | } | |
5516 | ||
548b0f22 | 5517 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5518 | i, 0, &ctxt); |
88c3b062 TM |
5519 | |
5520 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5521 | if (ctxt.meta_ac) { |
5522 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5523 | ctxt.meta_ac = NULL; | |
5524 | } | |
a3944256 TM |
5525 | if (ret) { |
5526 | mlog_errno(ret); | |
5527 | break; | |
5528 | } | |
5529 | } | |
5530 | ||
ce9c5a54 TM |
5531 | if (ctxt.meta_ac) |
5532 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5533 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5534 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5535 | return ret; |
5536 | } | |
5537 | ||
492a8a33 TM |
5538 | /* |
5539 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5540 | * or change the extent record flag), we need to recalculate | |
5541 | * the metaecc for the whole bucket. So it is done here. | |
5542 | * | |
5543 | * Note: | |
5544 | * We have to give the extra credits for the caller. | |
5545 | */ | |
5546 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5547 | handle_t *handle, | |
5548 | void *para) | |
5549 | { | |
5550 | int ret; | |
5551 | struct ocfs2_xattr_bucket *bucket = | |
5552 | (struct ocfs2_xattr_bucket *)para; | |
5553 | ||
5554 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5555 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5556 | if (ret) { | |
5557 | mlog_errno(ret); | |
5558 | return ret; | |
5559 | } | |
5560 | ||
5561 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5562 | ||
5563 | return 0; | |
5564 | } | |
5565 | ||
5566 | /* | |
5567 | * Special action we need if the xattr value is refcounted. | |
5568 | * | |
5569 | * 1. If the xattr is refcounted, lock the tree. | |
5570 | * 2. CoW the xattr if we are setting the new value and the value | |
5571 | * will be stored outside. | |
5572 | * 3. In other case, decrease_refcount will work for us, so just | |
5573 | * lock the refcount tree, calculate the meta and credits is OK. | |
5574 | * | |
5575 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5576 | * currently CoW is a completed transaction, while this function | |
5577 | * will also lock the allocators and let us deadlock. So we will | |
5578 | * CoW the whole xattr value. | |
5579 | */ | |
5580 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5581 | struct ocfs2_dinode *di, | |
5582 | struct ocfs2_xattr_info *xi, | |
5583 | struct ocfs2_xattr_search *xis, | |
5584 | struct ocfs2_xattr_search *xbs, | |
5585 | struct ocfs2_refcount_tree **ref_tree, | |
5586 | int *meta_add, | |
5587 | int *credits) | |
5588 | { | |
5589 | int ret = 0; | |
5590 | struct ocfs2_xattr_block *xb; | |
5591 | struct ocfs2_xattr_entry *xe; | |
5592 | char *base; | |
5593 | u32 p_cluster, num_clusters; | |
5594 | unsigned int ext_flags; | |
5595 | int name_offset, name_len; | |
5596 | struct ocfs2_xattr_value_buf vb; | |
5597 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5598 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5599 | struct ocfs2_post_refcount refcount; | |
5600 | struct ocfs2_post_refcount *p = NULL; | |
5601 | struct buffer_head *ref_root_bh = NULL; | |
5602 | ||
5603 | if (!xis->not_found) { | |
5604 | xe = xis->here; | |
5605 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5606 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5607 | base = xis->base; | |
5608 | vb.vb_bh = xis->inode_bh; | |
5609 | vb.vb_access = ocfs2_journal_access_di; | |
5610 | } else { | |
5611 | int i, block_off = 0; | |
5612 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5613 | xe = xbs->here; | |
5614 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5615 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5616 | i = xbs->here - xbs->header->xh_entries; | |
5617 | ||
5618 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5619 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5620 | bucket_xh(xbs->bucket), |
5621 | i, &block_off, | |
5622 | &name_offset); | |
5623 | if (ret) { | |
5624 | mlog_errno(ret); | |
5625 | goto out; | |
5626 | } | |
5627 | base = bucket_block(xbs->bucket, block_off); | |
5628 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5629 | vb.vb_access = ocfs2_journal_access; | |
5630 | ||
5631 | if (ocfs2_meta_ecc(osb)) { | |
5632 | /*create parameters for ocfs2_post_refcount. */ | |
5633 | bucket = xbs->bucket; | |
5634 | refcount.credits = bucket->bu_blocks; | |
5635 | refcount.para = bucket; | |
5636 | refcount.func = | |
5637 | ocfs2_xattr_bucket_post_refcount; | |
5638 | p = &refcount; | |
5639 | } | |
5640 | } else { | |
5641 | base = xbs->base; | |
5642 | vb.vb_bh = xbs->xattr_bh; | |
5643 | vb.vb_access = ocfs2_journal_access_xb; | |
5644 | } | |
5645 | } | |
5646 | ||
5647 | if (ocfs2_xattr_is_local(xe)) | |
5648 | goto out; | |
5649 | ||
5650 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5651 | (base + name_offset + name_len); | |
5652 | ||
5653 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5654 | &num_clusters, &vb.vb_xv->xr_list, | |
5655 | &ext_flags); | |
5656 | if (ret) { | |
5657 | mlog_errno(ret); | |
5658 | goto out; | |
5659 | } | |
5660 | ||
5661 | /* | |
5662 | * We just need to check the 1st extent record, since we always | |
5663 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5664 | * some REFCOUNT extent recs after the 1st one. | |
5665 | */ | |
5666 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5667 | goto out; | |
5668 | ||
5669 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5670 | 1, ref_tree, &ref_root_bh); | |
5671 | if (ret) { | |
5672 | mlog_errno(ret); | |
5673 | goto out; | |
5674 | } | |
5675 | ||
5676 | /* | |
5677 | * If we are deleting the xattr or the new size will be stored inside, | |
5678 | * cool, leave it there, the xattr truncate process will remove them | |
5679 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5680 | * And the worse case is that every cluster truncate will split the | |
5681 | * refcount tree, and make the original extent become 3. So we will need | |
5682 | * 2 * cluster more extent recs at most. | |
5683 | */ | |
5684 | if (!xi->value || xi->value_len <= OCFS2_XATTR_INLINE_SIZE) { | |
5685 | ||
5686 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5687 | &(*ref_tree)->rf_ci, | |
5688 | ref_root_bh, vb.vb_xv, | |
5689 | meta_add, credits); | |
5690 | if (ret) | |
5691 | mlog_errno(ret); | |
5692 | goto out; | |
5693 | } | |
5694 | ||
5695 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5696 | *ref_tree, ref_root_bh, 0, | |
5697 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5698 | if (ret) | |
5699 | mlog_errno(ret); | |
5700 | ||
5701 | out: | |
5702 | brelse(ref_root_bh); | |
5703 | return ret; | |
5704 | } | |
5705 | ||
0129241e TM |
5706 | /* |
5707 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5708 | * The physical clusters will be added to refcount tree. | |
5709 | */ | |
5710 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5711 | struct ocfs2_xattr_value_root *xv, | |
5712 | struct ocfs2_extent_tree *value_et, | |
5713 | struct ocfs2_caching_info *ref_ci, | |
5714 | struct buffer_head *ref_root_bh, | |
5715 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5716 | struct ocfs2_post_refcount *refcount) | |
5717 | { | |
5718 | int ret = 0; | |
5719 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5720 | u32 cpos, p_cluster, num_clusters; | |
5721 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5722 | unsigned int ext_flags; | |
5723 | ||
5724 | cpos = 0; | |
5725 | while (cpos < clusters) { | |
5726 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5727 | &num_clusters, el, &ext_flags); | |
5728 | ||
5729 | cpos += num_clusters; | |
5730 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5731 | continue; | |
5732 | ||
5733 | BUG_ON(!p_cluster); | |
5734 | ||
5735 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5736 | ref_ci, ref_root_bh, | |
5737 | cpos - num_clusters, | |
5738 | p_cluster, num_clusters, | |
5739 | dealloc, refcount); | |
5740 | if (ret) { | |
5741 | mlog_errno(ret); | |
5742 | break; | |
5743 | } | |
5744 | } | |
5745 | ||
5746 | return ret; | |
5747 | } | |
5748 | ||
5749 | /* | |
5750 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5751 | * have value stored outside. | |
5752 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5753 | */ | |
5754 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5755 | struct ocfs2_xattr_value_buf *vb, | |
5756 | struct ocfs2_xattr_header *header, | |
5757 | struct ocfs2_caching_info *ref_ci, | |
5758 | struct buffer_head *ref_root_bh, | |
5759 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5760 | { | |
5761 | ||
5762 | struct ocfs2_xattr_entry *xe; | |
5763 | struct ocfs2_xattr_value_root *xv; | |
5764 | struct ocfs2_extent_tree et; | |
5765 | int i, ret = 0; | |
5766 | ||
5767 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5768 | xe = &header->xh_entries[i]; | |
5769 | ||
5770 | if (ocfs2_xattr_is_local(xe)) | |
5771 | continue; | |
5772 | ||
5773 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5774 | le16_to_cpu(xe->xe_name_offset) + | |
5775 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5776 | ||
5777 | vb->vb_xv = xv; | |
5778 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5779 | ||
5780 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5781 | ref_ci, ref_root_bh, | |
5782 | dealloc, NULL); | |
5783 | if (ret) { | |
5784 | mlog_errno(ret); | |
5785 | break; | |
5786 | } | |
5787 | } | |
5788 | ||
5789 | return ret; | |
5790 | } | |
5791 | ||
5792 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5793 | struct buffer_head *fe_bh, | |
5794 | struct ocfs2_caching_info *ref_ci, | |
5795 | struct buffer_head *ref_root_bh, | |
5796 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5797 | { | |
5798 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5799 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5800 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5801 | le16_to_cpu(di->i_xattr_inline_size)); | |
5802 | struct ocfs2_xattr_value_buf vb = { | |
5803 | .vb_bh = fe_bh, | |
5804 | .vb_access = ocfs2_journal_access_di, | |
5805 | }; | |
5806 | ||
5807 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5808 | ref_ci, ref_root_bh, dealloc); | |
5809 | } | |
5810 | ||
5811 | struct ocfs2_xattr_tree_value_refcount_para { | |
5812 | struct ocfs2_caching_info *ref_ci; | |
5813 | struct buffer_head *ref_root_bh; | |
5814 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
5815 | }; | |
5816 | ||
5817 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
5818 | struct ocfs2_xattr_bucket *bucket, | |
5819 | int offset, | |
5820 | struct ocfs2_xattr_value_root **xv, | |
5821 | struct buffer_head **bh) | |
5822 | { | |
5823 | int ret, block_off, name_offset; | |
5824 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
5825 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
5826 | void *base; | |
5827 | ||
5828 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
5829 | bucket_xh(bucket), | |
5830 | offset, | |
5831 | &block_off, | |
5832 | &name_offset); | |
5833 | if (ret) { | |
5834 | mlog_errno(ret); | |
5835 | goto out; | |
5836 | } | |
5837 | ||
5838 | base = bucket_block(bucket, block_off); | |
5839 | ||
5840 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
5841 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5842 | ||
5843 | if (bh) | |
5844 | *bh = bucket->bu_bhs[block_off]; | |
5845 | out: | |
5846 | return ret; | |
5847 | } | |
5848 | ||
5849 | /* | |
5850 | * For a given xattr bucket, refcount all the entries which | |
5851 | * have value stored outside. | |
5852 | */ | |
5853 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
5854 | struct ocfs2_xattr_bucket *bucket, | |
5855 | void *para) | |
5856 | { | |
5857 | int i, ret = 0; | |
5858 | struct ocfs2_extent_tree et; | |
5859 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
5860 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
5861 | struct ocfs2_xattr_header *xh = | |
5862 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
5863 | struct ocfs2_xattr_entry *xe; | |
5864 | struct ocfs2_xattr_value_buf vb = { | |
5865 | .vb_access = ocfs2_journal_access, | |
5866 | }; | |
5867 | struct ocfs2_post_refcount refcount = { | |
5868 | .credits = bucket->bu_blocks, | |
5869 | .para = bucket, | |
5870 | .func = ocfs2_xattr_bucket_post_refcount, | |
5871 | }; | |
5872 | struct ocfs2_post_refcount *p = NULL; | |
5873 | ||
5874 | /* We only need post_refcount if we support metaecc. */ | |
5875 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
5876 | p = &refcount; | |
5877 | ||
5878 | mlog(0, "refcount bucket %llu, count = %u\n", | |
5879 | (unsigned long long)bucket_blkno(bucket), | |
5880 | le16_to_cpu(xh->xh_count)); | |
5881 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5882 | xe = &xh->xh_entries[i]; | |
5883 | ||
5884 | if (ocfs2_xattr_is_local(xe)) | |
5885 | continue; | |
5886 | ||
5887 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
5888 | &vb.vb_xv, &vb.vb_bh); | |
5889 | if (ret) { | |
5890 | mlog_errno(ret); | |
5891 | break; | |
5892 | } | |
5893 | ||
5894 | ocfs2_init_xattr_value_extent_tree(&et, | |
5895 | INODE_CACHE(inode), &vb); | |
5896 | ||
5897 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
5898 | &et, ref->ref_ci, | |
5899 | ref->ref_root_bh, | |
5900 | ref->dealloc, p); | |
5901 | if (ret) { | |
5902 | mlog_errno(ret); | |
5903 | break; | |
5904 | } | |
5905 | } | |
5906 | ||
5907 | return ret; | |
5908 | ||
5909 | } | |
5910 | ||
5911 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
5912 | struct buffer_head *root_bh, | |
5913 | u64 blkno, u32 cpos, u32 len, void *para) | |
5914 | { | |
5915 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
5916 | ocfs2_xattr_bucket_value_refcount, | |
5917 | para); | |
5918 | } | |
5919 | ||
5920 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
5921 | struct buffer_head *blk_bh, | |
5922 | struct ocfs2_caching_info *ref_ci, | |
5923 | struct buffer_head *ref_root_bh, | |
5924 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5925 | { | |
5926 | int ret = 0; | |
5927 | struct ocfs2_xattr_block *xb = | |
5928 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
5929 | ||
5930 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
5931 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
5932 | struct ocfs2_xattr_value_buf vb = { | |
5933 | .vb_bh = blk_bh, | |
5934 | .vb_access = ocfs2_journal_access_xb, | |
5935 | }; | |
5936 | ||
5937 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
5938 | ref_ci, ref_root_bh, | |
5939 | dealloc); | |
5940 | } else { | |
5941 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
5942 | .ref_ci = ref_ci, | |
5943 | .ref_root_bh = ref_root_bh, | |
5944 | .dealloc = dealloc, | |
5945 | }; | |
5946 | ||
5947 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
5948 | ocfs2_refcount_xattr_tree_rec, | |
5949 | ¶); | |
5950 | } | |
5951 | ||
5952 | return ret; | |
5953 | } | |
5954 | ||
5955 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
5956 | struct buffer_head *fe_bh, | |
5957 | struct ocfs2_caching_info *ref_ci, | |
5958 | struct buffer_head *ref_root_bh, | |
5959 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5960 | { | |
5961 | int ret = 0; | |
5962 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
5963 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5964 | struct buffer_head *blk_bh = NULL; | |
5965 | ||
5966 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
5967 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
5968 | ref_ci, ref_root_bh, | |
5969 | dealloc); | |
5970 | if (ret) { | |
5971 | mlog_errno(ret); | |
5972 | goto out; | |
5973 | } | |
5974 | } | |
5975 | ||
5976 | if (!di->i_xattr_loc) | |
5977 | goto out; | |
5978 | ||
5979 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
5980 | &blk_bh); | |
5981 | if (ret < 0) { | |
5982 | mlog_errno(ret); | |
5983 | goto out; | |
5984 | } | |
5985 | ||
5986 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
5987 | ref_root_bh, dealloc); | |
5988 | if (ret) | |
5989 | mlog_errno(ret); | |
5990 | ||
5991 | brelse(blk_bh); | |
5992 | out: | |
5993 | ||
5994 | return ret; | |
5995 | } | |
5996 | ||
2999d12f TM |
5997 | /* |
5998 | * Store the information we need in xattr reflink. | |
5999 | * old_bh and new_bh are inode bh for the old and new inode. | |
6000 | */ | |
6001 | struct ocfs2_xattr_reflink { | |
6002 | struct inode *old_inode; | |
6003 | struct inode *new_inode; | |
6004 | struct buffer_head *old_bh; | |
6005 | struct buffer_head *new_bh; | |
6006 | struct ocfs2_caching_info *ref_ci; | |
6007 | struct buffer_head *ref_root_bh; | |
6008 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
6009 | }; | |
6010 | ||
6011 | /* | |
6012 | * Given a xattr header and xe offset, | |
6013 | * return the proper xv and the corresponding bh. | |
6014 | * xattr in inode, block and xattr tree have different implementaions. | |
6015 | */ | |
6016 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6017 | struct buffer_head *bh, | |
6018 | struct ocfs2_xattr_header *xh, | |
6019 | int offset, | |
6020 | struct ocfs2_xattr_value_root **xv, | |
6021 | struct buffer_head **ret_bh, | |
6022 | void *para); | |
6023 | ||
6024 | /* | |
6025 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6026 | * credits we need if we create them from the scratch. | |
6027 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6028 | */ | |
6029 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6030 | struct buffer_head *bh, | |
6031 | struct ocfs2_xattr_header *xh, | |
6032 | int *metas, int *credits, | |
6033 | int *num_recs, | |
6034 | get_xattr_value_root *func, | |
6035 | void *para) | |
6036 | { | |
6037 | int i, ret = 0; | |
6038 | struct ocfs2_xattr_value_root *xv; | |
6039 | struct ocfs2_xattr_entry *xe; | |
6040 | ||
6041 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6042 | xe = &xh->xh_entries[i]; | |
6043 | if (ocfs2_xattr_is_local(xe)) | |
6044 | continue; | |
6045 | ||
6046 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6047 | if (ret) { | |
6048 | mlog_errno(ret); | |
6049 | break; | |
6050 | } | |
6051 | ||
6052 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6053 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6054 | ||
6055 | *credits += ocfs2_calc_extend_credits(sb, | |
6056 | &def_xv.xv.xr_list, | |
6057 | le32_to_cpu(xv->xr_clusters)); | |
6058 | ||
6059 | /* | |
6060 | * If the value is a tree with depth > 1, We don't go deep | |
6061 | * to the extent block, so just calculate a maximum record num. | |
6062 | */ | |
6063 | if (!xv->xr_list.l_tree_depth) | |
6064 | *num_recs += xv->xr_list.l_next_free_rec; | |
6065 | else | |
6066 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6067 | XATTR_SIZE_MAX); | |
6068 | } | |
6069 | ||
6070 | return ret; | |
6071 | } | |
6072 | ||
6073 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6074 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6075 | struct buffer_head *bh, | |
6076 | struct ocfs2_xattr_header *xh, | |
6077 | int offset, | |
6078 | struct ocfs2_xattr_value_root **xv, | |
6079 | struct buffer_head **ret_bh, | |
6080 | void *para) | |
6081 | { | |
6082 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6083 | ||
6084 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6085 | le16_to_cpu(xe->xe_name_offset) + | |
6086 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6087 | ||
6088 | if (ret_bh) | |
6089 | *ret_bh = bh; | |
6090 | ||
6091 | return 0; | |
6092 | } | |
6093 | ||
6094 | /* | |
6095 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6096 | * It is only used for inline xattr and xattr block. | |
6097 | */ | |
6098 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6099 | struct ocfs2_xattr_header *xh, | |
6100 | struct buffer_head *ref_root_bh, | |
6101 | int *credits, | |
6102 | struct ocfs2_alloc_context **meta_ac) | |
6103 | { | |
6104 | int ret, meta_add = 0, num_recs = 0; | |
6105 | struct ocfs2_refcount_block *rb = | |
6106 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6107 | ||
6108 | *credits = 0; | |
6109 | ||
6110 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6111 | &meta_add, credits, &num_recs, | |
6112 | ocfs2_get_xattr_value_root, | |
6113 | NULL); | |
6114 | if (ret) { | |
6115 | mlog_errno(ret); | |
6116 | goto out; | |
6117 | } | |
6118 | ||
6119 | /* | |
6120 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6121 | * an approximate number we need for refcount tree change. | |
6122 | * Sometimes we need to split the tree, and after split, half recs | |
6123 | * will be moved to the new block, and a new block can only provide | |
6124 | * half number of recs. So we multiple new blocks by 2. | |
6125 | */ | |
6126 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6127 | meta_add += num_recs; | |
6128 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6129 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6130 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6131 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6132 | else | |
6133 | *credits += 1; | |
6134 | ||
6135 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6136 | if (ret) | |
6137 | mlog_errno(ret); | |
6138 | ||
6139 | out: | |
6140 | return ret; | |
6141 | } | |
6142 | ||
6143 | /* | |
6144 | * Given a xattr header, reflink all the xattrs in this container. | |
6145 | * It can be used for inode, block and bucket. | |
6146 | * | |
6147 | * NOTE: | |
6148 | * Before we call this function, the caller has memcpy the xattr in | |
6149 | * old_xh to the new_xh. | |
6150 | */ | |
6151 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6152 | struct ocfs2_xattr_reflink *args, | |
6153 | struct buffer_head *old_bh, | |
6154 | struct ocfs2_xattr_header *xh, | |
6155 | struct buffer_head *new_bh, | |
6156 | struct ocfs2_xattr_header *new_xh, | |
6157 | struct ocfs2_xattr_value_buf *vb, | |
6158 | struct ocfs2_alloc_context *meta_ac, | |
6159 | get_xattr_value_root *func, | |
6160 | void *para) | |
6161 | { | |
6162 | int ret = 0, i; | |
6163 | struct super_block *sb = args->old_inode->i_sb; | |
6164 | struct buffer_head *value_bh; | |
6165 | struct ocfs2_xattr_entry *xe; | |
6166 | struct ocfs2_xattr_value_root *xv, *new_xv; | |
6167 | struct ocfs2_extent_tree data_et; | |
6168 | u32 clusters, cpos, p_cluster, num_clusters; | |
6169 | unsigned int ext_flags = 0; | |
6170 | ||
6171 | mlog(0, "reflink xattr in container %llu, count = %u\n", | |
6172 | (unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count)); | |
6173 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6174 | xe = &xh->xh_entries[i]; | |
6175 | ||
6176 | if (ocfs2_xattr_is_local(xe)) | |
6177 | continue; | |
6178 | ||
6179 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6180 | if (ret) { | |
6181 | mlog_errno(ret); | |
6182 | break; | |
6183 | } | |
6184 | ||
6185 | ret = func(sb, new_bh, new_xh, i, &new_xv, &value_bh, para); | |
6186 | if (ret) { | |
6187 | mlog_errno(ret); | |
6188 | break; | |
6189 | } | |
6190 | ||
6191 | /* | |
6192 | * For the xattr which has l_tree_depth = 0, all the extent | |
6193 | * recs have already be copied to the new xh with the | |
6194 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6195 | * increase the refount count int the refcount tree. | |
6196 | * | |
6197 | * For the xattr which has l_tree_depth > 0, we need | |
6198 | * to initialize it to the empty default value root, | |
6199 | * and then insert the extents one by one. | |
6200 | */ | |
6201 | if (xv->xr_list.l_tree_depth) { | |
6202 | memcpy(new_xv, &def_xv, sizeof(def_xv)); | |
6203 | vb->vb_xv = new_xv; | |
6204 | vb->vb_bh = value_bh; | |
6205 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6206 | INODE_CACHE(args->new_inode), vb); | |
6207 | } | |
6208 | ||
6209 | clusters = le32_to_cpu(xv->xr_clusters); | |
6210 | cpos = 0; | |
6211 | while (cpos < clusters) { | |
6212 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6213 | cpos, | |
6214 | &p_cluster, | |
6215 | &num_clusters, | |
6216 | &xv->xr_list, | |
6217 | &ext_flags); | |
6218 | if (ret) { | |
6219 | mlog_errno(ret); | |
6220 | goto out; | |
6221 | } | |
6222 | ||
6223 | BUG_ON(!p_cluster); | |
6224 | ||
6225 | if (xv->xr_list.l_tree_depth) { | |
6226 | ret = ocfs2_insert_extent(handle, | |
6227 | &data_et, cpos, | |
6228 | ocfs2_clusters_to_blocks( | |
6229 | args->old_inode->i_sb, | |
6230 | p_cluster), | |
6231 | num_clusters, ext_flags, | |
6232 | meta_ac); | |
6233 | if (ret) { | |
6234 | mlog_errno(ret); | |
6235 | goto out; | |
6236 | } | |
6237 | } | |
6238 | ||
6239 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6240 | args->ref_root_bh, | |
6241 | p_cluster, num_clusters, | |
6242 | meta_ac, args->dealloc); | |
6243 | if (ret) { | |
6244 | mlog_errno(ret); | |
6245 | goto out; | |
6246 | } | |
6247 | ||
6248 | cpos += num_clusters; | |
6249 | } | |
6250 | } | |
6251 | ||
6252 | out: | |
6253 | return ret; | |
6254 | } | |
6255 | ||
6256 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6257 | { | |
6258 | int ret = 0, credits = 0; | |
6259 | handle_t *handle; | |
6260 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6261 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6262 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6263 | int header_off = osb->sb->s_blocksize - inline_size; | |
6264 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6265 | (args->old_bh->b_data + header_off); | |
6266 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6267 | (args->new_bh->b_data + header_off); | |
6268 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6269 | struct ocfs2_inode_info *new_oi; | |
6270 | struct ocfs2_dinode *new_di; | |
6271 | struct ocfs2_xattr_value_buf vb = { | |
6272 | .vb_bh = args->new_bh, | |
6273 | .vb_access = ocfs2_journal_access_di, | |
6274 | }; | |
6275 | ||
6276 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6277 | &credits, &meta_ac); | |
6278 | if (ret) { | |
6279 | mlog_errno(ret); | |
6280 | goto out; | |
6281 | } | |
6282 | ||
6283 | handle = ocfs2_start_trans(osb, credits); | |
6284 | if (IS_ERR(handle)) { | |
6285 | ret = PTR_ERR(handle); | |
6286 | mlog_errno(ret); | |
6287 | goto out; | |
6288 | } | |
6289 | ||
6290 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6291 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6292 | if (ret) { | |
6293 | mlog_errno(ret); | |
6294 | goto out_commit; | |
6295 | } | |
6296 | ||
6297 | memcpy(args->new_bh->b_data + header_off, | |
6298 | args->old_bh->b_data + header_off, inline_size); | |
6299 | ||
6300 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6301 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6302 | ||
6303 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6304 | args->new_bh, new_xh, &vb, meta_ac, | |
6305 | ocfs2_get_xattr_value_root, NULL); | |
6306 | if (ret) { | |
6307 | mlog_errno(ret); | |
6308 | goto out_commit; | |
6309 | } | |
6310 | ||
6311 | new_oi = OCFS2_I(args->new_inode); | |
6312 | spin_lock(&new_oi->ip_lock); | |
6313 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6314 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6315 | spin_unlock(&new_oi->ip_lock); | |
6316 | ||
6317 | ocfs2_journal_dirty(handle, args->new_bh); | |
6318 | ||
6319 | out_commit: | |
6320 | ocfs2_commit_trans(osb, handle); | |
6321 | ||
6322 | out: | |
6323 | if (meta_ac) | |
6324 | ocfs2_free_alloc_context(meta_ac); | |
6325 | return ret; | |
6326 | } | |
6327 | ||
6328 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6329 | struct buffer_head *fe_bh, | |
6330 | struct buffer_head **ret_bh, | |
6331 | int indexed) | |
6332 | { | |
6333 | int ret; | |
6334 | handle_t *handle; | |
6335 | struct ocfs2_alloc_context *meta_ac; | |
6336 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6337 | ||
6338 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
6339 | if (ret < 0) { | |
6340 | mlog_errno(ret); | |
6341 | return ret; | |
6342 | } | |
6343 | ||
6344 | handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
6345 | if (IS_ERR(handle)) { | |
6346 | ret = PTR_ERR(handle); | |
6347 | mlog_errno(ret); | |
6348 | goto out; | |
6349 | } | |
6350 | ||
6351 | mlog(0, "create new xattr block for inode %llu, index = %d\n", | |
6352 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
6353 | ret = ocfs2_create_xattr_block(handle, inode, fe_bh, | |
6354 | meta_ac, ret_bh, indexed); | |
6355 | if (ret) | |
6356 | mlog_errno(ret); | |
6357 | ||
6358 | ocfs2_commit_trans(osb, handle); | |
6359 | out: | |
6360 | ocfs2_free_alloc_context(meta_ac); | |
6361 | return ret; | |
6362 | } | |
6363 | ||
6364 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6365 | struct buffer_head *blk_bh, | |
6366 | struct buffer_head *new_blk_bh) | |
6367 | { | |
6368 | int ret = 0, credits = 0; | |
6369 | handle_t *handle; | |
6370 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6371 | struct ocfs2_dinode *new_di; | |
6372 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6373 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6374 | struct ocfs2_xattr_block *xb = | |
6375 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6376 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6377 | struct ocfs2_xattr_block *new_xb = | |
6378 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6379 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6380 | struct ocfs2_alloc_context *meta_ac; | |
6381 | struct ocfs2_xattr_value_buf vb = { | |
6382 | .vb_bh = new_blk_bh, | |
6383 | .vb_access = ocfs2_journal_access_xb, | |
6384 | }; | |
6385 | ||
6386 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6387 | &credits, &meta_ac); | |
6388 | if (ret) { | |
6389 | mlog_errno(ret); | |
6390 | return ret; | |
6391 | } | |
6392 | ||
6393 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6394 | handle = ocfs2_start_trans(osb, credits + 1); | |
6395 | if (IS_ERR(handle)) { | |
6396 | ret = PTR_ERR(handle); | |
6397 | mlog_errno(ret); | |
6398 | goto out; | |
6399 | } | |
6400 | ||
6401 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6402 | ret = ocfs2_journal_access_di(handle, | |
6403 | INODE_CACHE(args->new_inode), | |
6404 | args->new_bh, | |
6405 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6406 | if (ret) { | |
6407 | mlog_errno(ret); | |
6408 | goto out_commit; | |
6409 | } | |
6410 | } | |
6411 | ||
6412 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6413 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6414 | if (ret) { | |
6415 | mlog_errno(ret); | |
6416 | goto out_commit; | |
6417 | } | |
6418 | ||
6419 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6420 | osb->sb->s_blocksize - header_off); | |
6421 | ||
6422 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6423 | new_blk_bh, new_xh, &vb, meta_ac, | |
6424 | ocfs2_get_xattr_value_root, NULL); | |
6425 | if (ret) { | |
6426 | mlog_errno(ret); | |
6427 | goto out_commit; | |
6428 | } | |
6429 | ||
6430 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6431 | ||
6432 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6433 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6434 | spin_lock(&new_oi->ip_lock); | |
6435 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6436 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6437 | spin_unlock(&new_oi->ip_lock); | |
6438 | ||
6439 | ocfs2_journal_dirty(handle, args->new_bh); | |
6440 | } | |
6441 | ||
6442 | out_commit: | |
6443 | ocfs2_commit_trans(osb, handle); | |
6444 | ||
6445 | out: | |
6446 | ocfs2_free_alloc_context(meta_ac); | |
6447 | return ret; | |
6448 | } | |
6449 | ||
6450 | struct ocfs2_reflink_xattr_tree_args { | |
6451 | struct ocfs2_xattr_reflink *reflink; | |
6452 | struct buffer_head *old_blk_bh; | |
6453 | struct buffer_head *new_blk_bh; | |
6454 | struct ocfs2_xattr_bucket *old_bucket; | |
6455 | struct ocfs2_xattr_bucket *new_bucket; | |
6456 | }; | |
6457 | ||
6458 | /* | |
6459 | * NOTE: | |
6460 | * We have to handle the case that both old bucket and new bucket | |
6461 | * will call this function to get the right ret_bh. | |
6462 | * So The caller must give us the right bh. | |
6463 | */ | |
6464 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6465 | struct buffer_head *bh, | |
6466 | struct ocfs2_xattr_header *xh, | |
6467 | int offset, | |
6468 | struct ocfs2_xattr_value_root **xv, | |
6469 | struct buffer_head **ret_bh, | |
6470 | void *para) | |
6471 | { | |
6472 | struct ocfs2_reflink_xattr_tree_args *args = | |
6473 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6474 | struct ocfs2_xattr_bucket *bucket; | |
6475 | ||
6476 | if (bh == args->old_bucket->bu_bhs[0]) | |
6477 | bucket = args->old_bucket; | |
6478 | else | |
6479 | bucket = args->new_bucket; | |
6480 | ||
6481 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6482 | xv, ret_bh); | |
6483 | } | |
6484 | ||
6485 | struct ocfs2_value_tree_metas { | |
6486 | int num_metas; | |
6487 | int credits; | |
6488 | int num_recs; | |
6489 | }; | |
6490 | ||
6491 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6492 | struct buffer_head *bh, | |
6493 | struct ocfs2_xattr_header *xh, | |
6494 | int offset, | |
6495 | struct ocfs2_xattr_value_root **xv, | |
6496 | struct buffer_head **ret_bh, | |
6497 | void *para) | |
6498 | { | |
6499 | struct ocfs2_xattr_bucket *bucket = | |
6500 | (struct ocfs2_xattr_bucket *)para; | |
6501 | ||
6502 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6503 | xv, ret_bh); | |
6504 | } | |
6505 | ||
6506 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6507 | struct ocfs2_xattr_bucket *bucket, | |
6508 | void *para) | |
6509 | { | |
6510 | struct ocfs2_value_tree_metas *metas = | |
6511 | (struct ocfs2_value_tree_metas *)para; | |
6512 | struct ocfs2_xattr_header *xh = | |
6513 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6514 | ||
6515 | /* Add the credits for this bucket first. */ | |
6516 | metas->credits += bucket->bu_blocks; | |
6517 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6518 | xh, &metas->num_metas, | |
6519 | &metas->credits, &metas->num_recs, | |
6520 | ocfs2_value_tree_metas_in_bucket, | |
6521 | bucket); | |
6522 | } | |
6523 | ||
6524 | /* | |
6525 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6526 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6527 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6528 | */ | |
6529 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6530 | struct ocfs2_reflink_xattr_tree_args *args, | |
6531 | struct ocfs2_extent_tree *xt_et, | |
6532 | u64 blkno, u32 len, int *credits, | |
6533 | struct ocfs2_alloc_context **meta_ac, | |
6534 | struct ocfs2_alloc_context **data_ac) | |
6535 | { | |
6536 | int ret, num_free_extents; | |
6537 | struct ocfs2_value_tree_metas metas; | |
6538 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6539 | struct ocfs2_refcount_block *rb; | |
6540 | ||
6541 | memset(&metas, 0, sizeof(metas)); | |
6542 | ||
6543 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6544 | ocfs2_calc_value_tree_metas, &metas); | |
6545 | if (ret) { | |
6546 | mlog_errno(ret); | |
6547 | goto out; | |
6548 | } | |
6549 | ||
6550 | *credits = metas.credits; | |
6551 | ||
6552 | /* | |
6553 | * Calculate we need for refcount tree change. | |
6554 | * | |
6555 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6556 | * an approximate number we need for refcount tree change. | |
6557 | * Sometimes we need to split the tree, and after split, half recs | |
6558 | * will be moved to the new block, and a new block can only provide | |
6559 | * half number of recs. So we multiple new blocks by 2. | |
6560 | * In the end, we have to add credits for modifying the already | |
6561 | * existed refcount block. | |
6562 | */ | |
6563 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6564 | metas.num_recs = | |
6565 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6566 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6567 | metas.num_metas += metas.num_recs; | |
6568 | *credits += metas.num_recs + | |
6569 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6570 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6571 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6572 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6573 | else | |
6574 | *credits += 1; | |
6575 | ||
6576 | /* count in the xattr tree change. */ | |
6577 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); | |
6578 | if (num_free_extents < 0) { | |
6579 | ret = num_free_extents; | |
6580 | mlog_errno(ret); | |
6581 | goto out; | |
6582 | } | |
6583 | ||
6584 | if (num_free_extents < len) | |
6585 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6586 | ||
6587 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
6588 | xt_et->et_root_el, len); | |
6589 | ||
6590 | if (metas.num_metas) { | |
6591 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6592 | meta_ac); | |
6593 | if (ret) { | |
6594 | mlog_errno(ret); | |
6595 | goto out; | |
6596 | } | |
6597 | } | |
6598 | ||
6599 | if (len) { | |
6600 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6601 | if (ret) | |
6602 | mlog_errno(ret); | |
6603 | } | |
6604 | out: | |
6605 | if (ret) { | |
6606 | if (*meta_ac) { | |
6607 | ocfs2_free_alloc_context(*meta_ac); | |
6608 | meta_ac = NULL; | |
6609 | } | |
6610 | } | |
6611 | ||
6612 | return ret; | |
6613 | } | |
6614 | ||
6615 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6616 | u64 blkno, u64 new_blkno, u32 clusters, | |
6617 | struct ocfs2_alloc_context *meta_ac, | |
6618 | struct ocfs2_alloc_context *data_ac, | |
6619 | struct ocfs2_reflink_xattr_tree_args *args) | |
6620 | { | |
6621 | int i, j, ret = 0; | |
6622 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
6623 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
6624 | u32 num_buckets = clusters * bpc; | |
6625 | int bpb = args->old_bucket->bu_blocks; | |
6626 | struct ocfs2_xattr_value_buf vb = { | |
6627 | .vb_access = ocfs2_journal_access, | |
6628 | }; | |
6629 | ||
6630 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6631 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6632 | if (ret) { | |
6633 | mlog_errno(ret); | |
6634 | break; | |
6635 | } | |
6636 | ||
6637 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno); | |
6638 | if (ret) { | |
6639 | mlog_errno(ret); | |
6640 | break; | |
6641 | } | |
6642 | ||
6643 | /* | |
6644 | * The real bucket num in this series of blocks is stored | |
6645 | * in the 1st bucket. | |
6646 | */ | |
6647 | if (i == 0) | |
6648 | num_buckets = le16_to_cpu( | |
6649 | bucket_xh(args->old_bucket)->xh_num_buckets); | |
6650 | ||
6651 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6652 | args->new_bucket, | |
6653 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6654 | if (ret) { | |
6655 | mlog_errno(ret); | |
6656 | break; | |
6657 | } | |
6658 | ||
6659 | for (j = 0; j < bpb; j++) | |
6660 | memcpy(bucket_block(args->new_bucket, j), | |
6661 | bucket_block(args->old_bucket, j), | |
6662 | sb->s_blocksize); | |
6663 | ||
6664 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6665 | ||
6666 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6667 | args->old_bucket->bu_bhs[0], | |
6668 | bucket_xh(args->old_bucket), | |
6669 | args->new_bucket->bu_bhs[0], | |
6670 | bucket_xh(args->new_bucket), | |
6671 | &vb, meta_ac, | |
6672 | ocfs2_get_reflink_xattr_value_root, | |
6673 | args); | |
6674 | if (ret) { | |
6675 | mlog_errno(ret); | |
6676 | break; | |
6677 | } | |
6678 | ||
6679 | /* | |
6680 | * Re-access and dirty the bucket to calculate metaecc. | |
6681 | * Because we may extend the transaction in reflink_xattr_header | |
6682 | * which will let the already accessed block gone. | |
6683 | */ | |
6684 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6685 | args->new_bucket, | |
6686 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6687 | if (ret) { | |
6688 | mlog_errno(ret); | |
6689 | break; | |
6690 | } | |
6691 | ||
6692 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6693 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6694 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6695 | } | |
6696 | ||
6697 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6698 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6699 | return ret; | |
6700 | } | |
6701 | /* | |
6702 | * Create the same xattr extent record in the new inode's xattr tree. | |
6703 | */ | |
6704 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6705 | struct buffer_head *root_bh, | |
6706 | u64 blkno, | |
6707 | u32 cpos, | |
6708 | u32 len, | |
6709 | void *para) | |
6710 | { | |
6711 | int ret, credits = 0; | |
6712 | u32 p_cluster, num_clusters; | |
6713 | u64 new_blkno; | |
6714 | handle_t *handle; | |
6715 | struct ocfs2_reflink_xattr_tree_args *args = | |
6716 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6717 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6718 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6719 | struct ocfs2_alloc_context *data_ac = NULL; | |
6720 | struct ocfs2_extent_tree et; | |
6721 | ||
6722 | ocfs2_init_xattr_tree_extent_tree(&et, | |
6723 | INODE_CACHE(args->reflink->new_inode), | |
6724 | args->new_blk_bh); | |
6725 | ||
6726 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
6727 | len, &credits, | |
6728 | &meta_ac, &data_ac); | |
6729 | if (ret) { | |
6730 | mlog_errno(ret); | |
6731 | goto out; | |
6732 | } | |
6733 | ||
6734 | handle = ocfs2_start_trans(osb, credits); | |
6735 | if (IS_ERR(handle)) { | |
6736 | ret = PTR_ERR(handle); | |
6737 | mlog_errno(ret); | |
6738 | goto out; | |
6739 | } | |
6740 | ||
6741 | ret = ocfs2_claim_clusters(osb, handle, data_ac, | |
6742 | len, &p_cluster, &num_clusters); | |
6743 | if (ret) { | |
6744 | mlog_errno(ret); | |
6745 | goto out_commit; | |
6746 | } | |
6747 | ||
6748 | new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster); | |
6749 | ||
6750 | mlog(0, "reflink xattr buckets %llu to %llu, len %u\n", | |
6751 | (unsigned long long)blkno, (unsigned long long)new_blkno, len); | |
6752 | ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len, | |
6753 | meta_ac, data_ac, args); | |
6754 | if (ret) { | |
6755 | mlog_errno(ret); | |
6756 | goto out_commit; | |
6757 | } | |
6758 | ||
6759 | mlog(0, "insert new xattr extent rec start %llu len %u to %u\n", | |
6760 | (unsigned long long)new_blkno, len, cpos); | |
6761 | ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno, | |
6762 | len, 0, meta_ac); | |
6763 | if (ret) | |
6764 | mlog_errno(ret); | |
6765 | ||
6766 | out_commit: | |
6767 | ocfs2_commit_trans(osb, handle); | |
6768 | ||
6769 | out: | |
6770 | if (meta_ac) | |
6771 | ocfs2_free_alloc_context(meta_ac); | |
6772 | if (data_ac) | |
6773 | ocfs2_free_alloc_context(data_ac); | |
6774 | return ret; | |
6775 | } | |
6776 | ||
6777 | /* | |
6778 | * Create reflinked xattr buckets. | |
6779 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
6780 | * if they are stored outside. | |
6781 | */ | |
6782 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
6783 | struct buffer_head *blk_bh, | |
6784 | struct buffer_head *new_blk_bh) | |
6785 | { | |
6786 | int ret; | |
6787 | struct ocfs2_reflink_xattr_tree_args para; | |
6788 | ||
6789 | memset(¶, 0, sizeof(para)); | |
6790 | para.reflink = args; | |
6791 | para.old_blk_bh = blk_bh; | |
6792 | para.new_blk_bh = new_blk_bh; | |
6793 | ||
6794 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
6795 | if (!para.old_bucket) { | |
6796 | mlog_errno(-ENOMEM); | |
6797 | return -ENOMEM; | |
6798 | } | |
6799 | ||
6800 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
6801 | if (!para.new_bucket) { | |
6802 | ret = -ENOMEM; | |
6803 | mlog_errno(ret); | |
6804 | goto out; | |
6805 | } | |
6806 | ||
6807 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
6808 | ocfs2_reflink_xattr_rec, | |
6809 | ¶); | |
6810 | if (ret) | |
6811 | mlog_errno(ret); | |
6812 | ||
6813 | out: | |
6814 | ocfs2_xattr_bucket_free(para.old_bucket); | |
6815 | ocfs2_xattr_bucket_free(para.new_bucket); | |
6816 | return ret; | |
6817 | } | |
6818 | ||
6819 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
6820 | struct buffer_head *blk_bh) | |
6821 | { | |
6822 | int ret, indexed = 0; | |
6823 | struct buffer_head *new_blk_bh = NULL; | |
6824 | struct ocfs2_xattr_block *xb = | |
6825 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6826 | ||
6827 | ||
6828 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
6829 | indexed = 1; | |
6830 | ||
6831 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
6832 | &new_blk_bh, indexed); | |
6833 | if (ret) { | |
6834 | mlog_errno(ret); | |
6835 | goto out; | |
6836 | } | |
6837 | ||
6838 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) | |
6839 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); | |
6840 | else | |
6841 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
6842 | if (ret) | |
6843 | mlog_errno(ret); | |
6844 | ||
6845 | out: | |
6846 | brelse(new_blk_bh); | |
6847 | return ret; | |
6848 | } | |
6849 | ||
6850 | int ocfs2_reflink_xattrs(struct inode *old_inode, | |
6851 | struct buffer_head *old_bh, | |
6852 | struct inode *new_inode, | |
6853 | struct buffer_head *new_bh) | |
6854 | { | |
6855 | int ret; | |
6856 | struct ocfs2_xattr_reflink args; | |
6857 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
6858 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
6859 | struct buffer_head *blk_bh = NULL; | |
6860 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
6861 | struct ocfs2_refcount_tree *ref_tree; | |
6862 | struct buffer_head *ref_root_bh = NULL; | |
6863 | ||
6864 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
6865 | le64_to_cpu(di->i_refcount_loc), | |
6866 | 1, &ref_tree, &ref_root_bh); | |
6867 | if (ret) { | |
6868 | mlog_errno(ret); | |
6869 | goto out; | |
6870 | } | |
6871 | ||
6872 | ocfs2_init_dealloc_ctxt(&dealloc); | |
6873 | ||
6874 | args.old_inode = old_inode; | |
6875 | args.new_inode = new_inode; | |
6876 | args.old_bh = old_bh; | |
6877 | args.new_bh = new_bh; | |
6878 | args.ref_ci = &ref_tree->rf_ci; | |
6879 | args.ref_root_bh = ref_root_bh; | |
6880 | args.dealloc = &dealloc; | |
6881 | ||
6882 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6883 | ret = ocfs2_reflink_xattr_inline(&args); | |
6884 | if (ret) { | |
6885 | mlog_errno(ret); | |
6886 | goto out_unlock; | |
6887 | } | |
6888 | } | |
6889 | ||
6890 | if (!di->i_xattr_loc) | |
6891 | goto out_unlock; | |
6892 | ||
6893 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
6894 | &blk_bh); | |
6895 | if (ret < 0) { | |
6896 | mlog_errno(ret); | |
6897 | goto out_unlock; | |
6898 | } | |
6899 | ||
6900 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
6901 | if (ret) | |
6902 | mlog_errno(ret); | |
6903 | ||
6904 | brelse(blk_bh); | |
6905 | ||
6906 | out_unlock: | |
6907 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
6908 | ref_tree, 1); | |
6909 | brelse(ref_root_bh); | |
6910 | ||
6911 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
6912 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
6913 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
6914 | } | |
6915 | ||
6916 | out: | |
6917 | return ret; | |
6918 | } | |
6919 | ||
923f7f31 TY |
6920 | /* |
6921 | * 'security' attributes support | |
6922 | */ | |
6923 | static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, | |
6924 | size_t list_size, const char *name, | |
6925 | size_t name_len) | |
6926 | { | |
6927 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
6928 | const size_t total_len = prefix_len + name_len + 1; | |
6929 | ||
6930 | if (list && total_len <= list_size) { | |
6931 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
6932 | memcpy(list + prefix_len, name, name_len); | |
6933 | list[prefix_len + name_len] = '\0'; | |
6934 | } | |
6935 | return total_len; | |
6936 | } | |
6937 | ||
6938 | static int ocfs2_xattr_security_get(struct inode *inode, const char *name, | |
6939 | void *buffer, size_t size) | |
6940 | { | |
6941 | if (strcmp(name, "") == 0) | |
6942 | return -EINVAL; | |
6943 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, | |
6944 | buffer, size); | |
6945 | } | |
6946 | ||
6947 | static int ocfs2_xattr_security_set(struct inode *inode, const char *name, | |
6948 | const void *value, size_t size, int flags) | |
6949 | { | |
6950 | if (strcmp(name, "") == 0) | |
6951 | return -EINVAL; | |
6952 | ||
6953 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, | |
6954 | size, flags); | |
6955 | } | |
6956 | ||
534eaddd TY |
6957 | int ocfs2_init_security_get(struct inode *inode, |
6958 | struct inode *dir, | |
6959 | struct ocfs2_security_xattr_info *si) | |
6960 | { | |
38d59ef6 TY |
6961 | /* check whether ocfs2 support feature xattr */ |
6962 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
6963 | return -EOPNOTSUPP; | |
534eaddd TY |
6964 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
6965 | &si->value_len); | |
6966 | } | |
6967 | ||
6968 | int ocfs2_init_security_set(handle_t *handle, | |
6969 | struct inode *inode, | |
6970 | struct buffer_head *di_bh, | |
6971 | struct ocfs2_security_xattr_info *si, | |
6972 | struct ocfs2_alloc_context *xattr_ac, | |
6973 | struct ocfs2_alloc_context *data_ac) | |
6974 | { | |
6975 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
6976 | OCFS2_XATTR_INDEX_SECURITY, | |
6977 | si->name, si->value, si->value_len, 0, | |
6978 | xattr_ac, data_ac); | |
6979 | } | |
6980 | ||
923f7f31 TY |
6981 | struct xattr_handler ocfs2_xattr_security_handler = { |
6982 | .prefix = XATTR_SECURITY_PREFIX, | |
6983 | .list = ocfs2_xattr_security_list, | |
6984 | .get = ocfs2_xattr_security_get, | |
6985 | .set = ocfs2_xattr_security_set, | |
6986 | }; | |
6987 | ||
99219aea MF |
6988 | /* |
6989 | * 'trusted' attributes support | |
6990 | */ | |
99219aea MF |
6991 | static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, |
6992 | size_t list_size, const char *name, | |
6993 | size_t name_len) | |
6994 | { | |
ceb1eba3 | 6995 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
6996 | const size_t total_len = prefix_len + name_len + 1; |
6997 | ||
6998 | if (list && total_len <= list_size) { | |
6999 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
7000 | memcpy(list + prefix_len, name, name_len); | |
7001 | list[prefix_len + name_len] = '\0'; | |
7002 | } | |
7003 | return total_len; | |
7004 | } | |
7005 | ||
7006 | static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
7007 | void *buffer, size_t size) | |
7008 | { | |
7009 | if (strcmp(name, "") == 0) | |
7010 | return -EINVAL; | |
7011 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
7012 | buffer, size); | |
7013 | } | |
7014 | ||
7015 | static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
7016 | const void *value, size_t size, int flags) | |
7017 | { | |
7018 | if (strcmp(name, "") == 0) | |
7019 | return -EINVAL; | |
7020 | ||
7021 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
7022 | size, flags); | |
7023 | } | |
7024 | ||
7025 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
7026 | .prefix = XATTR_TRUSTED_PREFIX, | |
7027 | .list = ocfs2_xattr_trusted_list, | |
7028 | .get = ocfs2_xattr_trusted_get, | |
7029 | .set = ocfs2_xattr_trusted_set, | |
7030 | }; | |
7031 | ||
99219aea MF |
7032 | /* |
7033 | * 'user' attributes support | |
7034 | */ | |
99219aea MF |
7035 | static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, |
7036 | size_t list_size, const char *name, | |
7037 | size_t name_len) | |
7038 | { | |
ceb1eba3 | 7039 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea MF |
7040 | const size_t total_len = prefix_len + name_len + 1; |
7041 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7042 | ||
7043 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7044 | return 0; | |
7045 | ||
7046 | if (list && total_len <= list_size) { | |
7047 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
7048 | memcpy(list + prefix_len, name, name_len); | |
7049 | list[prefix_len + name_len] = '\0'; | |
7050 | } | |
7051 | return total_len; | |
7052 | } | |
7053 | ||
7054 | static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
7055 | void *buffer, size_t size) | |
7056 | { | |
7057 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7058 | ||
7059 | if (strcmp(name, "") == 0) | |
7060 | return -EINVAL; | |
7061 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7062 | return -EOPNOTSUPP; | |
7063 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
7064 | buffer, size); | |
7065 | } | |
7066 | ||
7067 | static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
7068 | const void *value, size_t size, int flags) | |
7069 | { | |
7070 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7071 | ||
7072 | if (strcmp(name, "") == 0) | |
7073 | return -EINVAL; | |
7074 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7075 | return -EOPNOTSUPP; | |
7076 | ||
7077 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
7078 | size, flags); | |
7079 | } | |
7080 | ||
7081 | struct xattr_handler ocfs2_xattr_user_handler = { | |
7082 | .prefix = XATTR_USER_PREFIX, | |
7083 | .list = ocfs2_xattr_user_list, | |
7084 | .get = ocfs2_xattr_user_get, | |
7085 | .set = ocfs2_xattr_user_set, | |
7086 | }; |