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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" |
0fe9b66c | 59 | #include "acl.h" |
cf1d6c76 TY |
60 | |
61 | struct ocfs2_xattr_def_value_root { | |
62 | struct ocfs2_xattr_value_root xv; | |
63 | struct ocfs2_extent_rec er; | |
64 | }; | |
65 | ||
0c044f0b | 66 | struct ocfs2_xattr_bucket { |
ba937127 JB |
67 | /* The inode these xattrs are associated with */ |
68 | struct inode *bu_inode; | |
69 | ||
70 | /* The actual buffers that make up the bucket */ | |
4ac6032d | 71 | struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
ba937127 JB |
72 | |
73 | /* How many blocks make up one bucket for this filesystem */ | |
74 | int bu_blocks; | |
0c044f0b TM |
75 | }; |
76 | ||
78f30c31 | 77 | struct ocfs2_xattr_set_ctxt { |
85db90e7 | 78 | handle_t *handle; |
78f30c31 TM |
79 | struct ocfs2_alloc_context *meta_ac; |
80 | struct ocfs2_alloc_context *data_ac; | |
81 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
82 | }; | |
83 | ||
cf1d6c76 TY |
84 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
85 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 86 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
87 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
88 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 89 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
90 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
91 | - sizeof(struct ocfs2_xattr_block) \ | |
92 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 93 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
94 | |
95 | static struct ocfs2_xattr_def_value_root def_xv = { | |
96 | .xv.xr_list.l_count = cpu_to_le16(1), | |
97 | }; | |
98 | ||
99 | struct xattr_handler *ocfs2_xattr_handlers[] = { | |
100 | &ocfs2_xattr_user_handler, | |
929fb014 TY |
101 | &ocfs2_xattr_acl_access_handler, |
102 | &ocfs2_xattr_acl_default_handler, | |
cf1d6c76 | 103 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 104 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
105 | NULL |
106 | }; | |
107 | ||
c988fd04 | 108 | static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 109 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 TY |
110 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
111 | = &ocfs2_xattr_acl_access_handler, | |
112 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
113 | = &ocfs2_xattr_acl_default_handler, | |
cf1d6c76 | 114 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 115 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
116 | }; |
117 | ||
118 | struct ocfs2_xattr_info { | |
6b240ff6 JB |
119 | int xi_name_index; |
120 | const char *xi_name; | |
121 | const void *xi_value; | |
122 | size_t xi_value_len; | |
cf1d6c76 TY |
123 | }; |
124 | ||
125 | struct ocfs2_xattr_search { | |
126 | struct buffer_head *inode_bh; | |
127 | /* | |
128 | * xattr_bh point to the block buffer head which has extended attribute | |
129 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
130 | */ | |
131 | struct buffer_head *xattr_bh; | |
132 | struct ocfs2_xattr_header *header; | |
ba937127 | 133 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
134 | void *base; |
135 | void *end; | |
136 | struct ocfs2_xattr_entry *here; | |
137 | int not_found; | |
138 | }; | |
139 | ||
11179f2c JB |
140 | /* Operations on struct ocfs2_xa_entry */ |
141 | struct ocfs2_xa_loc; | |
142 | struct ocfs2_xa_loc_operations { | |
143 | /* | |
144 | * Return a pointer to the appropriate buffer in loc->xl_storage | |
145 | * at the given offset from loc->xl_header. | |
146 | */ | |
147 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); | |
148 | ||
149 | /* | |
150 | * Remove the name+value at this location. Do whatever is | |
151 | * appropriate with the remaining name+value pairs. | |
152 | */ | |
153 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); | |
154 | }; | |
155 | ||
156 | /* | |
157 | * Describes an xattr entry location. This is a memory structure | |
158 | * tracking the on-disk structure. | |
159 | */ | |
160 | struct ocfs2_xa_loc { | |
161 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ | |
162 | struct ocfs2_xattr_header *xl_header; | |
163 | ||
164 | /* Bytes from xl_header to the end of the storage */ | |
165 | int xl_size; | |
166 | ||
167 | /* | |
168 | * The ocfs2_xattr_entry this location describes. If this is | |
169 | * NULL, this location describes the on-disk structure where it | |
170 | * would have been. | |
171 | */ | |
172 | struct ocfs2_xattr_entry *xl_entry; | |
173 | ||
174 | /* | |
175 | * Internal housekeeping | |
176 | */ | |
177 | ||
178 | /* Buffer(s) containing this entry */ | |
179 | void *xl_storage; | |
180 | ||
181 | /* Operations on the storage backing this location */ | |
182 | const struct ocfs2_xa_loc_operations *xl_ops; | |
183 | }; | |
184 | ||
fd68a894 | 185 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
186 | struct ocfs2_xattr_header *xh, |
187 | int index, | |
188 | int *block_off, | |
189 | int *new_offset); | |
190 | ||
54f443f4 JB |
191 | static int ocfs2_xattr_block_find(struct inode *inode, |
192 | int name_index, | |
193 | const char *name, | |
194 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
195 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
196 | struct buffer_head *root_bh, | |
197 | int name_index, | |
198 | const char *name, | |
199 | struct ocfs2_xattr_search *xs); | |
200 | ||
0c044f0b | 201 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 202 | struct buffer_head *blk_bh, |
0c044f0b TM |
203 | char *buffer, |
204 | size_t buffer_size); | |
205 | ||
01225596 | 206 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
207 | struct ocfs2_xattr_search *xs, |
208 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
209 | |
210 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
211 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
212 | struct ocfs2_xattr_search *xs, |
213 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 214 | |
47bca495 TM |
215 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
216 | struct buffer_head *root_bh, | |
217 | u64 blkno, u32 cpos, u32 len, void *para); | |
218 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
219 | struct buffer_head *root_bh, | |
220 | xattr_tree_rec_func *rec_func, | |
221 | void *para); | |
222 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
223 | struct ocfs2_xattr_bucket *bucket, | |
224 | void *para); | |
225 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
226 | struct buffer_head *root_bh, | |
227 | u64 blkno, | |
228 | u32 cpos, | |
229 | u32 len, | |
230 | void *para); | |
231 | ||
c58b6032 JB |
232 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
233 | u64 src_blk, u64 last_blk, u64 to_blk, | |
234 | unsigned int start_bucket, | |
235 | u32 *first_hash); | |
492a8a33 TM |
236 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
237 | struct ocfs2_dinode *di, | |
238 | struct ocfs2_xattr_info *xi, | |
239 | struct ocfs2_xattr_search *xis, | |
240 | struct ocfs2_xattr_search *xbs, | |
241 | struct ocfs2_refcount_tree **ref_tree, | |
242 | int *meta_need, | |
243 | int *credits); | |
ce9c5a54 TM |
244 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
245 | struct ocfs2_xattr_bucket *bucket, | |
246 | int offset, | |
247 | struct ocfs2_xattr_value_root **xv, | |
248 | struct buffer_head **bh); | |
a3944256 | 249 | |
0030e001 TY |
250 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
251 | { | |
252 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
253 | } | |
254 | ||
255 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
256 | { | |
257 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
258 | } | |
259 | ||
260 | static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) | |
261 | { | |
262 | u16 len = sb->s_blocksize - | |
263 | offsetof(struct ocfs2_xattr_header, xh_entries); | |
264 | ||
265 | return len / sizeof(struct ocfs2_xattr_entry); | |
266 | } | |
267 | ||
9c7759aa | 268 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 269 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 270 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 271 | |
ba937127 | 272 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 273 | { |
ba937127 JB |
274 | struct ocfs2_xattr_bucket *bucket; |
275 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 276 | |
ba937127 JB |
277 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
278 | ||
279 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
280 | if (bucket) { | |
281 | bucket->bu_inode = inode; | |
282 | bucket->bu_blocks = blks; | |
283 | } | |
284 | ||
285 | return bucket; | |
286 | } | |
287 | ||
288 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
289 | { | |
290 | int i; | |
291 | ||
292 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
293 | brelse(bucket->bu_bhs[i]); |
294 | bucket->bu_bhs[i] = NULL; | |
295 | } | |
296 | } | |
297 | ||
ba937127 JB |
298 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
299 | { | |
300 | if (bucket) { | |
301 | ocfs2_xattr_bucket_relse(bucket); | |
302 | bucket->bu_inode = NULL; | |
303 | kfree(bucket); | |
304 | } | |
305 | } | |
306 | ||
784b816a JB |
307 | /* |
308 | * A bucket that has never been written to disk doesn't need to be | |
309 | * read. We just need the buffer_heads. Don't call this for | |
310 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
311 | * them fully. | |
312 | */ | |
ba937127 | 313 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
314 | u64 xb_blkno) |
315 | { | |
316 | int i, rc = 0; | |
784b816a | 317 | |
ba937127 JB |
318 | for (i = 0; i < bucket->bu_blocks; i++) { |
319 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
320 | xb_blkno + i); | |
784b816a JB |
321 | if (!bucket->bu_bhs[i]) { |
322 | rc = -EIO; | |
323 | mlog_errno(rc); | |
324 | break; | |
325 | } | |
326 | ||
8cb471e8 | 327 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 328 | bucket->bu_bhs[i])) |
8cb471e8 | 329 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
757055ad | 330 | bucket->bu_bhs[i]); |
784b816a JB |
331 | } |
332 | ||
333 | if (rc) | |
ba937127 | 334 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
335 | return rc; |
336 | } | |
337 | ||
338 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 339 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
340 | u64 xb_blkno) |
341 | { | |
ba937127 | 342 | int rc; |
784b816a | 343 | |
8cb471e8 | 344 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
345 | bucket->bu_blocks, bucket->bu_bhs, 0, |
346 | NULL); | |
4d0e214e | 347 | if (!rc) { |
c8b9cf9a | 348 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
349 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
350 | bucket->bu_bhs, | |
351 | bucket->bu_blocks, | |
352 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 353 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
354 | if (rc) |
355 | mlog_errno(rc); | |
356 | } | |
357 | ||
784b816a | 358 | if (rc) |
ba937127 | 359 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
360 | return rc; |
361 | } | |
362 | ||
1224be02 | 363 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
364 | struct ocfs2_xattr_bucket *bucket, |
365 | int type) | |
366 | { | |
367 | int i, rc = 0; | |
1224be02 | 368 | |
ba937127 | 369 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
370 | rc = ocfs2_journal_access(handle, |
371 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
372 | bucket->bu_bhs[i], type); |
373 | if (rc) { | |
374 | mlog_errno(rc); | |
375 | break; | |
376 | } | |
377 | } | |
378 | ||
379 | return rc; | |
380 | } | |
381 | ||
382 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
383 | struct ocfs2_xattr_bucket *bucket) |
384 | { | |
ba937127 | 385 | int i; |
1224be02 | 386 | |
c8b9cf9a | 387 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
388 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
389 | bucket->bu_bhs, bucket->bu_blocks, | |
390 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 391 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 392 | |
ba937127 | 393 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
394 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
395 | } | |
396 | ||
ba937127 | 397 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
398 | struct ocfs2_xattr_bucket *src) |
399 | { | |
400 | int i; | |
ba937127 JB |
401 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
402 | ||
403 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
404 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 405 | |
ba937127 | 406 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
407 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
408 | blocksize); | |
409 | } | |
410 | } | |
1224be02 | 411 | |
4ae1d69b JB |
412 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
413 | struct buffer_head *bh) | |
414 | { | |
d6b32bbb | 415 | int rc; |
4ae1d69b JB |
416 | struct ocfs2_xattr_block *xb = |
417 | (struct ocfs2_xattr_block *)bh->b_data; | |
418 | ||
419 | mlog(0, "Validating xattr block %llu\n", | |
420 | (unsigned long long)bh->b_blocknr); | |
421 | ||
d6b32bbb JB |
422 | BUG_ON(!buffer_uptodate(bh)); |
423 | ||
424 | /* | |
425 | * If the ecc fails, we return the error but otherwise | |
426 | * leave the filesystem running. We know any error is | |
427 | * local to this block. | |
428 | */ | |
429 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
430 | if (rc) | |
431 | return rc; | |
432 | ||
433 | /* | |
434 | * Errors after here are fatal | |
435 | */ | |
436 | ||
4ae1d69b JB |
437 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
438 | ocfs2_error(sb, | |
439 | "Extended attribute block #%llu has bad " | |
440 | "signature %.*s", | |
441 | (unsigned long long)bh->b_blocknr, 7, | |
442 | xb->xb_signature); | |
443 | return -EINVAL; | |
444 | } | |
445 | ||
446 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
447 | ocfs2_error(sb, | |
448 | "Extended attribute block #%llu has an " | |
449 | "invalid xb_blkno of %llu", | |
450 | (unsigned long long)bh->b_blocknr, | |
451 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
452 | return -EINVAL; | |
453 | } | |
454 | ||
455 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
456 | ocfs2_error(sb, | |
457 | "Extended attribute block #%llu has an invalid " | |
458 | "xb_fs_generation of #%u", | |
459 | (unsigned long long)bh->b_blocknr, | |
460 | le32_to_cpu(xb->xb_fs_generation)); | |
461 | return -EINVAL; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
468 | struct buffer_head **bh) | |
469 | { | |
470 | int rc; | |
471 | struct buffer_head *tmp = *bh; | |
472 | ||
8cb471e8 | 473 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 474 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
475 | |
476 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
477 | if (!rc && !*bh) | |
478 | *bh = tmp; | |
479 | ||
480 | return rc; | |
481 | } | |
482 | ||
936b8834 | 483 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 TY |
484 | { |
485 | struct xattr_handler *handler = NULL; | |
486 | ||
487 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
488 | handler = ocfs2_xattr_handler_map[name_index]; | |
489 | ||
936b8834 | 490 | return handler ? handler->prefix : NULL; |
cf1d6c76 TY |
491 | } |
492 | ||
40daa16a | 493 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 494 | const char *name, |
40daa16a | 495 | int name_len) |
cf1d6c76 TY |
496 | { |
497 | /* Get hash value of uuid from super block */ | |
498 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
499 | int i; | |
500 | ||
cf1d6c76 TY |
501 | /* hash extended attribute name */ |
502 | for (i = 0; i < name_len; i++) { | |
503 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
504 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
505 | *name++; | |
506 | } | |
507 | ||
508 | return hash; | |
509 | } | |
510 | ||
511 | /* | |
512 | * ocfs2_xattr_hash_entry() | |
513 | * | |
514 | * Compute the hash of an extended attribute. | |
515 | */ | |
516 | static void ocfs2_xattr_hash_entry(struct inode *inode, | |
517 | struct ocfs2_xattr_header *header, | |
518 | struct ocfs2_xattr_entry *entry) | |
519 | { | |
520 | u32 hash = 0; | |
cf1d6c76 | 521 | char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); |
cf1d6c76 | 522 | |
2057e5c6 | 523 | hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); |
cf1d6c76 TY |
524 | entry->xe_name_hash = cpu_to_le32(hash); |
525 | ||
526 | return; | |
527 | } | |
f56654c4 | 528 | |
534eaddd TY |
529 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
530 | { | |
531 | int size = 0; | |
532 | ||
533 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) | |
534 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
535 | else | |
536 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
537 | size += sizeof(struct ocfs2_xattr_entry); | |
538 | ||
539 | return size; | |
540 | } | |
541 | ||
542 | int ocfs2_calc_security_init(struct inode *dir, | |
543 | struct ocfs2_security_xattr_info *si, | |
544 | int *want_clusters, | |
545 | int *xattr_credits, | |
546 | struct ocfs2_alloc_context **xattr_ac) | |
547 | { | |
548 | int ret = 0; | |
549 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
550 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
551 | si->value_len); | |
552 | ||
553 | /* | |
554 | * The max space of security xattr taken inline is | |
555 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
556 | * So reserve one metadata block for it is ok. | |
557 | */ | |
558 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
559 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
560 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
561 | if (ret) { | |
562 | mlog_errno(ret); | |
563 | return ret; | |
564 | } | |
565 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
566 | } | |
567 | ||
568 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
569 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
570 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
571 | si->value_len); | |
572 | ||
573 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
574 | new_clusters); | |
575 | *want_clusters += new_clusters; | |
576 | } | |
534eaddd TY |
577 | return ret; |
578 | } | |
579 | ||
89c38bd0 TY |
580 | int ocfs2_calc_xattr_init(struct inode *dir, |
581 | struct buffer_head *dir_bh, | |
582 | int mode, | |
583 | struct ocfs2_security_xattr_info *si, | |
584 | int *want_clusters, | |
585 | int *xattr_credits, | |
9b7895ef | 586 | int *want_meta) |
89c38bd0 TY |
587 | { |
588 | int ret = 0; | |
589 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 590 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
591 | |
592 | if (si->enable) | |
593 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
594 | si->value_len); | |
595 | ||
596 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
597 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, | |
598 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
599 | "", NULL, 0); | |
600 | if (acl_len > 0) { | |
601 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
602 | if (S_ISDIR(mode)) | |
603 | a_size <<= 1; | |
604 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
605 | mlog_errno(ret); | |
606 | return ret; | |
607 | } | |
608 | } | |
609 | ||
610 | if (!(s_size + a_size)) | |
611 | return ret; | |
612 | ||
613 | /* | |
614 | * The max space of security xattr taken inline is | |
615 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
616 | * The max space of acl xattr taken inline is | |
617 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
618 | * when blocksize = 512, may reserve one more cluser for | |
619 | * xattr bucket, otherwise reserve one metadata block | |
620 | * for them is ok. | |
6c9fd1dc TY |
621 | * If this is a new directory with inline data, |
622 | * we choose to reserve the entire inline area for | |
623 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
624 | */ |
625 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 626 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 627 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 628 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
629 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
630 | } | |
631 | ||
632 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
633 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
634 | *want_clusters += 1; | |
635 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
636 | } | |
637 | ||
0e445b6f TY |
638 | /* |
639 | * reserve credits and clusters for xattrs which has large value | |
640 | * and have to be set outside | |
641 | */ | |
642 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
643 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
644 | si->value_len); | |
645 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
646 | new_clusters); | |
647 | *want_clusters += new_clusters; | |
648 | } | |
89c38bd0 TY |
649 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
650 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
651 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
652 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
653 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
654 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
655 | new_clusters); | |
656 | *want_clusters += new_clusters; | |
89c38bd0 TY |
657 | } |
658 | ||
659 | return ret; | |
660 | } | |
661 | ||
f56654c4 TM |
662 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
663 | u32 clusters_to_add, | |
19b801f4 | 664 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 665 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
666 | { |
667 | int status = 0; | |
85db90e7 | 668 | handle_t *handle = ctxt->handle; |
f56654c4 | 669 | enum ocfs2_alloc_restarted why; |
19b801f4 | 670 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 671 | struct ocfs2_extent_tree et; |
f56654c4 TM |
672 | |
673 | mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); | |
674 | ||
5e404e9e | 675 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 676 | |
0cf2f763 | 677 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
2a50a743 | 678 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
679 | if (status < 0) { |
680 | mlog_errno(status); | |
681 | goto leave; | |
682 | } | |
683 | ||
19b801f4 | 684 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
cbee7e1a JB |
685 | status = ocfs2_add_clusters_in_btree(handle, |
686 | &et, | |
f56654c4 TM |
687 | &logical_start, |
688 | clusters_to_add, | |
689 | 0, | |
78f30c31 TM |
690 | ctxt->data_ac, |
691 | ctxt->meta_ac, | |
f99b9b7c | 692 | &why); |
85db90e7 TM |
693 | if (status < 0) { |
694 | mlog_errno(status); | |
f56654c4 TM |
695 | goto leave; |
696 | } | |
697 | ||
19b801f4 | 698 | status = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
699 | if (status < 0) { |
700 | mlog_errno(status); | |
701 | goto leave; | |
702 | } | |
703 | ||
19b801f4 | 704 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - prev_clusters; |
f56654c4 | 705 | |
85db90e7 TM |
706 | /* |
707 | * We should have already allocated enough space before the transaction, | |
708 | * so no need to restart. | |
709 | */ | |
710 | BUG_ON(why != RESTART_NONE || clusters_to_add); | |
f56654c4 TM |
711 | |
712 | leave: | |
f56654c4 TM |
713 | |
714 | return status; | |
715 | } | |
716 | ||
717 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 718 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 719 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 720 | unsigned int ext_flags, |
78f30c31 | 721 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
722 | { |
723 | int ret; | |
724 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 725 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
726 | struct ocfs2_extent_tree et; |
727 | ||
5e404e9e | 728 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 729 | |
0cf2f763 | 730 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 731 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
732 | if (ret) { |
733 | mlog_errno(ret); | |
85db90e7 | 734 | goto out; |
f56654c4 TM |
735 | } |
736 | ||
dbdcf6a4 | 737 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 738 | &ctxt->dealloc); |
f56654c4 TM |
739 | if (ret) { |
740 | mlog_errno(ret); | |
85db90e7 | 741 | goto out; |
f56654c4 TM |
742 | } |
743 | ||
d72cc72d | 744 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
f56654c4 | 745 | |
d72cc72d | 746 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 TM |
747 | if (ret) { |
748 | mlog_errno(ret); | |
85db90e7 | 749 | goto out; |
f56654c4 TM |
750 | } |
751 | ||
492a8a33 TM |
752 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
753 | ret = ocfs2_decrease_refcount(inode, handle, | |
754 | ocfs2_blocks_to_clusters(inode->i_sb, | |
755 | phys_blkno), | |
756 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
757 | else | |
758 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
759 | phys_blkno, len); | |
f56654c4 TM |
760 | if (ret) |
761 | mlog_errno(ret); | |
762 | ||
f56654c4 | 763 | out: |
f56654c4 TM |
764 | return ret; |
765 | } | |
766 | ||
767 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
768 | u32 old_clusters, | |
769 | u32 new_clusters, | |
19b801f4 | 770 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 771 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
772 | { |
773 | int ret = 0; | |
492a8a33 | 774 | unsigned int ext_flags; |
f56654c4 TM |
775 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
776 | u64 block; | |
f56654c4 TM |
777 | |
778 | if (old_clusters <= new_clusters) | |
779 | return 0; | |
780 | ||
781 | cpos = new_clusters; | |
782 | trunc_len = old_clusters - new_clusters; | |
783 | while (trunc_len) { | |
784 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 785 | &alloc_size, |
492a8a33 | 786 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
787 | if (ret) { |
788 | mlog_errno(ret); | |
789 | goto out; | |
790 | } | |
791 | ||
792 | if (alloc_size > trunc_len) | |
793 | alloc_size = trunc_len; | |
794 | ||
19b801f4 | 795 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 796 | phys_cpos, alloc_size, |
492a8a33 | 797 | ext_flags, ctxt); |
f56654c4 TM |
798 | if (ret) { |
799 | mlog_errno(ret); | |
800 | goto out; | |
801 | } | |
802 | ||
803 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
804 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
805 | block, alloc_size); | |
f56654c4 TM |
806 | cpos += alloc_size; |
807 | trunc_len -= alloc_size; | |
808 | } | |
809 | ||
810 | out: | |
f56654c4 TM |
811 | return ret; |
812 | } | |
813 | ||
814 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 815 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
816 | int len, |
817 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
818 | { |
819 | int ret; | |
820 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 821 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
822 | |
823 | if (new_clusters == old_clusters) | |
824 | return 0; | |
825 | ||
826 | if (new_clusters > old_clusters) | |
827 | ret = ocfs2_xattr_extend_allocation(inode, | |
828 | new_clusters - old_clusters, | |
b3e5d379 | 829 | vb, ctxt); |
f56654c4 TM |
830 | else |
831 | ret = ocfs2_xattr_shrink_size(inode, | |
832 | old_clusters, new_clusters, | |
b3e5d379 | 833 | vb, ctxt); |
f56654c4 TM |
834 | |
835 | return ret; | |
836 | } | |
cf1d6c76 | 837 | |
936b8834 TM |
838 | static int ocfs2_xattr_list_entry(char *buffer, size_t size, |
839 | size_t *result, const char *prefix, | |
840 | const char *name, int name_len) | |
841 | { | |
842 | char *p = buffer + *result; | |
843 | int prefix_len = strlen(prefix); | |
844 | int total_len = prefix_len + name_len + 1; | |
845 | ||
846 | *result += total_len; | |
847 | ||
848 | /* we are just looking for how big our buffer needs to be */ | |
849 | if (!size) | |
850 | return 0; | |
851 | ||
852 | if (*result > size) | |
853 | return -ERANGE; | |
854 | ||
855 | memcpy(p, prefix, prefix_len); | |
856 | memcpy(p + prefix_len, name, name_len); | |
857 | p[prefix_len + name_len] = '\0'; | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
cf1d6c76 TY |
862 | static int ocfs2_xattr_list_entries(struct inode *inode, |
863 | struct ocfs2_xattr_header *header, | |
864 | char *buffer, size_t buffer_size) | |
865 | { | |
936b8834 TM |
866 | size_t result = 0; |
867 | int i, type, ret; | |
868 | const char *prefix, *name; | |
cf1d6c76 TY |
869 | |
870 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
871 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 TM |
872 | type = ocfs2_xattr_get_type(entry); |
873 | prefix = ocfs2_xattr_prefix(type); | |
874 | ||
875 | if (prefix) { | |
876 | name = (const char *)header + | |
877 | le16_to_cpu(entry->xe_name_offset); | |
878 | ||
879 | ret = ocfs2_xattr_list_entry(buffer, buffer_size, | |
880 | &result, prefix, name, | |
881 | entry->xe_name_len); | |
882 | if (ret) | |
883 | return ret; | |
cf1d6c76 TY |
884 | } |
885 | } | |
886 | ||
936b8834 | 887 | return result; |
cf1d6c76 TY |
888 | } |
889 | ||
8b2c0dba TM |
890 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
891 | struct ocfs2_dinode *di) | |
892 | { | |
893 | struct ocfs2_xattr_header *xh; | |
894 | int i; | |
895 | ||
896 | xh = (struct ocfs2_xattr_header *) | |
897 | ((void *)di + inode->i_sb->s_blocksize - | |
898 | le16_to_cpu(di->i_xattr_inline_size)); | |
899 | ||
900 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
901 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
902 | return 1; | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
cf1d6c76 TY |
907 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
908 | struct ocfs2_dinode *di, | |
909 | char *buffer, | |
910 | size_t buffer_size) | |
911 | { | |
912 | struct ocfs2_xattr_header *header = NULL; | |
913 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
914 | int ret = 0; | |
915 | ||
916 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
917 | return ret; | |
918 | ||
919 | header = (struct ocfs2_xattr_header *) | |
920 | ((void *)di + inode->i_sb->s_blocksize - | |
921 | le16_to_cpu(di->i_xattr_inline_size)); | |
922 | ||
923 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
924 | ||
925 | return ret; | |
926 | } | |
927 | ||
928 | static int ocfs2_xattr_block_list(struct inode *inode, | |
929 | struct ocfs2_dinode *di, | |
930 | char *buffer, | |
931 | size_t buffer_size) | |
932 | { | |
933 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 934 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
935 | int ret = 0; |
936 | ||
937 | if (!di->i_xattr_loc) | |
938 | return ret; | |
939 | ||
4ae1d69b JB |
940 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
941 | &blk_bh); | |
cf1d6c76 TY |
942 | if (ret < 0) { |
943 | mlog_errno(ret); | |
944 | return ret; | |
945 | } | |
cf1d6c76 | 946 | |
0c044f0b | 947 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
948 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
949 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
950 | ret = ocfs2_xattr_list_entries(inode, header, | |
951 | buffer, buffer_size); | |
47bca495 TM |
952 | } else |
953 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 954 | buffer, buffer_size); |
4ae1d69b | 955 | |
cf1d6c76 TY |
956 | brelse(blk_bh); |
957 | ||
958 | return ret; | |
959 | } | |
960 | ||
961 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
962 | char *buffer, | |
963 | size_t size) | |
964 | { | |
965 | int ret = 0, i_ret = 0, b_ret = 0; | |
966 | struct buffer_head *di_bh = NULL; | |
967 | struct ocfs2_dinode *di = NULL; | |
968 | struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
969 | ||
8154da3d TY |
970 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
971 | return -EOPNOTSUPP; | |
972 | ||
cf1d6c76 TY |
973 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
974 | return ret; | |
975 | ||
976 | ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
977 | if (ret < 0) { | |
978 | mlog_errno(ret); | |
979 | return ret; | |
980 | } | |
981 | ||
982 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
983 | ||
984 | down_read(&oi->ip_xattr_sem); | |
985 | i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
986 | if (i_ret < 0) | |
987 | b_ret = 0; | |
988 | else { | |
989 | if (buffer) { | |
990 | buffer += i_ret; | |
991 | size -= i_ret; | |
992 | } | |
993 | b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
994 | buffer, size); | |
995 | if (b_ret < 0) | |
996 | i_ret = 0; | |
997 | } | |
998 | up_read(&oi->ip_xattr_sem); | |
999 | ocfs2_inode_unlock(dentry->d_inode, 0); | |
1000 | ||
1001 | brelse(di_bh); | |
1002 | ||
1003 | return i_ret + b_ret; | |
1004 | } | |
1005 | ||
1006 | static int ocfs2_xattr_find_entry(int name_index, | |
1007 | const char *name, | |
1008 | struct ocfs2_xattr_search *xs) | |
1009 | { | |
1010 | struct ocfs2_xattr_entry *entry; | |
1011 | size_t name_len; | |
1012 | int i, cmp = 1; | |
1013 | ||
1014 | if (name == NULL) | |
1015 | return -EINVAL; | |
1016 | ||
1017 | name_len = strlen(name); | |
1018 | entry = xs->here; | |
1019 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1020 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
1021 | if (!cmp) | |
1022 | cmp = name_len - entry->xe_name_len; | |
1023 | if (!cmp) | |
1024 | cmp = memcmp(name, (xs->base + | |
1025 | le16_to_cpu(entry->xe_name_offset)), | |
1026 | name_len); | |
1027 | if (cmp == 0) | |
1028 | break; | |
1029 | entry += 1; | |
1030 | } | |
1031 | xs->here = entry; | |
1032 | ||
1033 | return cmp ? -ENODATA : 0; | |
1034 | } | |
1035 | ||
1036 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 1037 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
1038 | void *buffer, |
1039 | size_t len) | |
1040 | { | |
1041 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1042 | u64 blkno; | |
1043 | int i, ret = 0; | |
1044 | size_t cplen, blocksize; | |
1045 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1046 | struct ocfs2_extent_list *el; |
1047 | ||
cf1d6c76 TY |
1048 | el = &xv->xr_list; |
1049 | clusters = le32_to_cpu(xv->xr_clusters); | |
1050 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1051 | blocksize = inode->i_sb->s_blocksize; | |
1052 | ||
1053 | cpos = 0; | |
1054 | while (cpos < clusters) { | |
1055 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1056 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1057 | if (ret) { |
1058 | mlog_errno(ret); | |
1059 | goto out; | |
1060 | } | |
1061 | ||
1062 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1063 | /* Copy ocfs2_xattr_value */ | |
1064 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1065 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1066 | &bh, NULL); | |
cf1d6c76 TY |
1067 | if (ret) { |
1068 | mlog_errno(ret); | |
1069 | goto out; | |
1070 | } | |
1071 | ||
1072 | cplen = len >= blocksize ? blocksize : len; | |
1073 | memcpy(buffer, bh->b_data, cplen); | |
1074 | len -= cplen; | |
1075 | buffer += cplen; | |
1076 | ||
1077 | brelse(bh); | |
1078 | bh = NULL; | |
1079 | if (len == 0) | |
1080 | break; | |
1081 | } | |
1082 | cpos += num_clusters; | |
1083 | } | |
1084 | out: | |
1085 | return ret; | |
1086 | } | |
1087 | ||
1088 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1089 | int name_index, | |
1090 | const char *name, | |
1091 | void *buffer, | |
1092 | size_t buffer_size, | |
1093 | struct ocfs2_xattr_search *xs) | |
1094 | { | |
1095 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1096 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1097 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1098 | size_t size; |
1099 | int ret = 0; | |
1100 | ||
1101 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1102 | return -ENODATA; | |
1103 | ||
1104 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1105 | xs->header = (struct ocfs2_xattr_header *) | |
1106 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1107 | xs->base = (void *)xs->header; | |
1108 | xs->here = xs->header->xh_entries; | |
1109 | ||
1110 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1111 | if (ret) | |
1112 | return ret; | |
1113 | size = le64_to_cpu(xs->here->xe_value_size); | |
1114 | if (buffer) { | |
1115 | if (size > buffer_size) | |
1116 | return -ERANGE; | |
1117 | if (ocfs2_xattr_is_local(xs->here)) { | |
1118 | memcpy(buffer, (void *)xs->base + | |
1119 | le16_to_cpu(xs->here->xe_name_offset) + | |
1120 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1121 | } else { | |
589dc260 TM |
1122 | xv = (struct ocfs2_xattr_value_root *) |
1123 | (xs->base + le16_to_cpu( | |
1124 | xs->here->xe_name_offset) + | |
1125 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1126 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1127 | buffer, size); |
1128 | if (ret < 0) { | |
1129 | mlog_errno(ret); | |
1130 | return ret; | |
1131 | } | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | return size; | |
1136 | } | |
1137 | ||
1138 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1139 | int name_index, | |
1140 | const char *name, | |
1141 | void *buffer, | |
1142 | size_t buffer_size, | |
1143 | struct ocfs2_xattr_search *xs) | |
1144 | { | |
cf1d6c76 | 1145 | struct ocfs2_xattr_block *xb; |
589dc260 | 1146 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1147 | size_t size; |
44d8e4e1 SM |
1148 | int ret = -ENODATA, name_offset, name_len, i; |
1149 | int uninitialized_var(block_off); | |
cf1d6c76 | 1150 | |
ba937127 JB |
1151 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1152 | if (!xs->bucket) { | |
1153 | ret = -ENOMEM; | |
1154 | mlog_errno(ret); | |
1155 | goto cleanup; | |
1156 | } | |
589dc260 | 1157 | |
54f443f4 JB |
1158 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1159 | if (ret) { | |
cf1d6c76 | 1160 | mlog_errno(ret); |
cf1d6c76 TY |
1161 | goto cleanup; |
1162 | } | |
1163 | ||
6c1e183e TY |
1164 | if (xs->not_found) { |
1165 | ret = -ENODATA; | |
1166 | goto cleanup; | |
1167 | } | |
1168 | ||
54f443f4 | 1169 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1170 | size = le64_to_cpu(xs->here->xe_value_size); |
1171 | if (buffer) { | |
1172 | ret = -ERANGE; | |
1173 | if (size > buffer_size) | |
1174 | goto cleanup; | |
589dc260 TM |
1175 | |
1176 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1177 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1178 | i = xs->here - xs->header->xh_entries; | |
1179 | ||
1180 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1181 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1182 | bucket_xh(xs->bucket), |
589dc260 TM |
1183 | i, |
1184 | &block_off, | |
1185 | &name_offset); | |
ba937127 | 1186 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1187 | } |
cf1d6c76 TY |
1188 | if (ocfs2_xattr_is_local(xs->here)) { |
1189 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1190 | name_offset + name_len, size); |
cf1d6c76 | 1191 | } else { |
589dc260 TM |
1192 | xv = (struct ocfs2_xattr_value_root *) |
1193 | (xs->base + name_offset + name_len); | |
1194 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1195 | buffer, size); |
1196 | if (ret < 0) { | |
1197 | mlog_errno(ret); | |
1198 | goto cleanup; | |
1199 | } | |
1200 | } | |
1201 | } | |
1202 | ret = size; | |
1203 | cleanup: | |
ba937127 | 1204 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1205 | |
54f443f4 JB |
1206 | brelse(xs->xattr_bh); |
1207 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1208 | return ret; |
1209 | } | |
1210 | ||
4e3e9d02 TY |
1211 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1212 | struct buffer_head *di_bh, | |
0030e001 TY |
1213 | int name_index, |
1214 | const char *name, | |
1215 | void *buffer, | |
1216 | size_t buffer_size) | |
cf1d6c76 TY |
1217 | { |
1218 | int ret; | |
1219 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1220 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1221 | struct ocfs2_xattr_search xis = { | |
1222 | .not_found = -ENODATA, | |
1223 | }; | |
1224 | struct ocfs2_xattr_search xbs = { | |
1225 | .not_found = -ENODATA, | |
1226 | }; | |
1227 | ||
8154da3d TY |
1228 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1229 | return -EOPNOTSUPP; | |
1230 | ||
cf1d6c76 TY |
1231 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1232 | ret = -ENODATA; | |
1233 | ||
cf1d6c76 TY |
1234 | xis.inode_bh = xbs.inode_bh = di_bh; |
1235 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1236 | ||
1237 | down_read(&oi->ip_xattr_sem); | |
1238 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
1239 | buffer_size, &xis); | |
6c1e183e | 1240 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1241 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1242 | buffer_size, &xbs); | |
1243 | up_read(&oi->ip_xattr_sem); | |
4e3e9d02 TY |
1244 | |
1245 | return ret; | |
1246 | } | |
1247 | ||
1248 | /* ocfs2_xattr_get() | |
1249 | * | |
1250 | * Copy an extended attribute into the buffer provided. | |
1251 | * Buffer is NULL to compute the size of buffer required. | |
1252 | */ | |
1253 | static int ocfs2_xattr_get(struct inode *inode, | |
1254 | int name_index, | |
1255 | const char *name, | |
1256 | void *buffer, | |
1257 | size_t buffer_size) | |
1258 | { | |
1259 | int ret; | |
1260 | struct buffer_head *di_bh = NULL; | |
1261 | ||
1262 | ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
1263 | if (ret < 0) { | |
1264 | mlog_errno(ret); | |
1265 | return ret; | |
1266 | } | |
1267 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, | |
1268 | name, buffer, buffer_size); | |
1269 | ||
cf1d6c76 TY |
1270 | ocfs2_inode_unlock(inode, 0); |
1271 | ||
1272 | brelse(di_bh); | |
1273 | ||
1274 | return ret; | |
1275 | } | |
1276 | ||
1277 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1278 | handle_t *handle, |
492a8a33 | 1279 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1280 | const void *value, |
1281 | int value_len) | |
1282 | { | |
71d548a6 | 1283 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1284 | u16 blocksize = inode->i_sb->s_blocksize; |
1285 | u32 p_cluster, num_clusters; | |
1286 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1287 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1288 | u64 blkno; | |
1289 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1290 | unsigned int ext_flags; |
1291 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1292 | |
1293 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1294 | ||
cf1d6c76 TY |
1295 | while (cpos < clusters) { |
1296 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1297 | &num_clusters, &xv->xr_list, |
492a8a33 | 1298 | &ext_flags); |
cf1d6c76 TY |
1299 | if (ret) { |
1300 | mlog_errno(ret); | |
85db90e7 | 1301 | goto out; |
cf1d6c76 TY |
1302 | } |
1303 | ||
492a8a33 TM |
1304 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1305 | ||
cf1d6c76 TY |
1306 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1307 | ||
1308 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1309 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1310 | &bh, NULL); | |
cf1d6c76 TY |
1311 | if (ret) { |
1312 | mlog_errno(ret); | |
85db90e7 | 1313 | goto out; |
cf1d6c76 TY |
1314 | } |
1315 | ||
1316 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1317 | INODE_CACHE(inode), |
cf1d6c76 TY |
1318 | bh, |
1319 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1320 | if (ret < 0) { | |
1321 | mlog_errno(ret); | |
85db90e7 | 1322 | goto out; |
cf1d6c76 TY |
1323 | } |
1324 | ||
1325 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1326 | memcpy(bh->b_data, value, cp_len); | |
1327 | value_len -= cp_len; | |
1328 | value += cp_len; | |
1329 | if (cp_len < blocksize) | |
1330 | memset(bh->b_data + cp_len, 0, | |
1331 | blocksize - cp_len); | |
1332 | ||
1333 | ret = ocfs2_journal_dirty(handle, bh); | |
1334 | if (ret < 0) { | |
1335 | mlog_errno(ret); | |
85db90e7 | 1336 | goto out; |
cf1d6c76 TY |
1337 | } |
1338 | brelse(bh); | |
1339 | bh = NULL; | |
1340 | ||
1341 | /* | |
1342 | * XXX: do we need to empty all the following | |
1343 | * blocks in this cluster? | |
1344 | */ | |
1345 | if (!value_len) | |
1346 | break; | |
1347 | } | |
1348 | cpos += num_clusters; | |
1349 | } | |
cf1d6c76 TY |
1350 | out: |
1351 | brelse(bh); | |
1352 | ||
1353 | return ret; | |
1354 | } | |
1355 | ||
1356 | static int ocfs2_xattr_cleanup(struct inode *inode, | |
85db90e7 | 1357 | handle_t *handle, |
cf1d6c76 TY |
1358 | struct ocfs2_xattr_info *xi, |
1359 | struct ocfs2_xattr_search *xs, | |
512620f4 | 1360 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1361 | size_t offs) |
1362 | { | |
cf1d6c76 | 1363 | int ret = 0; |
6b240ff6 | 1364 | size_t name_len = strlen(xi->xi_name); |
cf1d6c76 TY |
1365 | void *val = xs->base + offs; |
1366 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1367 | ||
0cf2f763 | 1368 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
512620f4 | 1369 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1370 | if (ret) { |
1371 | mlog_errno(ret); | |
85db90e7 | 1372 | goto out; |
cf1d6c76 TY |
1373 | } |
1374 | /* Decrease xattr count */ | |
1375 | le16_add_cpu(&xs->header->xh_count, -1); | |
1376 | /* Remove the xattr entry and tree root which has already be set*/ | |
1377 | memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
1378 | memset(val, 0, size); | |
1379 | ||
512620f4 | 1380 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1381 | if (ret < 0) |
1382 | mlog_errno(ret); | |
cf1d6c76 TY |
1383 | out: |
1384 | return ret; | |
1385 | } | |
1386 | ||
1387 | static int ocfs2_xattr_update_entry(struct inode *inode, | |
85db90e7 | 1388 | handle_t *handle, |
cf1d6c76 TY |
1389 | struct ocfs2_xattr_info *xi, |
1390 | struct ocfs2_xattr_search *xs, | |
0c748e95 | 1391 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1392 | size_t offs) |
1393 | { | |
85db90e7 | 1394 | int ret; |
cf1d6c76 | 1395 | |
0cf2f763 | 1396 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
0c748e95 | 1397 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1398 | if (ret) { |
1399 | mlog_errno(ret); | |
85db90e7 | 1400 | goto out; |
cf1d6c76 TY |
1401 | } |
1402 | ||
1403 | xs->here->xe_name_offset = cpu_to_le16(offs); | |
6b240ff6 JB |
1404 | xs->here->xe_value_size = cpu_to_le64(xi->xi_value_len); |
1405 | if (xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) | |
cf1d6c76 TY |
1406 | ocfs2_xattr_set_local(xs->here, 1); |
1407 | else | |
1408 | ocfs2_xattr_set_local(xs->here, 0); | |
1409 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1410 | ||
0c748e95 | 1411 | ret = ocfs2_journal_dirty(handle, vb->vb_bh); |
cf1d6c76 TY |
1412 | if (ret < 0) |
1413 | mlog_errno(ret); | |
cf1d6c76 TY |
1414 | out: |
1415 | return ret; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | * ocfs2_xattr_set_value_outside() | |
1420 | * | |
1421 | * Set large size value in B tree. | |
1422 | */ | |
1423 | static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1424 | struct ocfs2_xattr_info *xi, | |
1425 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1426 | struct ocfs2_xattr_set_ctxt *ctxt, |
512620f4 | 1427 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1428 | size_t offs) |
1429 | { | |
6b240ff6 | 1430 | size_t name_len = strlen(xi->xi_name); |
cf1d6c76 TY |
1431 | void *val = xs->base + offs; |
1432 | struct ocfs2_xattr_value_root *xv = NULL; | |
1433 | size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1434 | int ret = 0; | |
1435 | ||
1436 | memset(val, 0, size); | |
6b240ff6 | 1437 | memcpy(val, xi->xi_name, name_len); |
cf1d6c76 TY |
1438 | xv = (struct ocfs2_xattr_value_root *) |
1439 | (val + OCFS2_XATTR_SIZE(name_len)); | |
1440 | xv->xr_clusters = 0; | |
1441 | xv->xr_last_eb_blk = 0; | |
1442 | xv->xr_list.l_tree_depth = 0; | |
1443 | xv->xr_list.l_count = cpu_to_le16(1); | |
1444 | xv->xr_list.l_next_free_rec = 0; | |
512620f4 | 1445 | vb->vb_xv = xv; |
cf1d6c76 | 1446 | |
6b240ff6 | 1447 | ret = ocfs2_xattr_value_truncate(inode, vb, xi->xi_value_len, ctxt); |
cf1d6c76 TY |
1448 | if (ret < 0) { |
1449 | mlog_errno(ret); | |
1450 | return ret; | |
1451 | } | |
512620f4 | 1452 | ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, vb, offs); |
cf1d6c76 TY |
1453 | if (ret < 0) { |
1454 | mlog_errno(ret); | |
1455 | return ret; | |
1456 | } | |
492a8a33 | 1457 | ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, vb, |
6b240ff6 | 1458 | xi->xi_value, xi->xi_value_len); |
cf1d6c76 TY |
1459 | if (ret < 0) |
1460 | mlog_errno(ret); | |
1461 | ||
1462 | return ret; | |
1463 | } | |
1464 | ||
11179f2c JB |
1465 | /* |
1466 | * Wipe the name+value pair and allow the storage to reclaim it. This | |
1467 | * must be followed by either removal of the entry or a call to | |
1468 | * ocfs2_xa_add_namevalue(). | |
1469 | */ | |
1470 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1471 | { | |
1472 | loc->xl_ops->xlo_wipe_namevalue(loc); | |
1473 | } | |
1474 | ||
1475 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, | |
1476 | int offset) | |
1477 | { | |
1478 | BUG_ON(offset >= loc->xl_size); | |
1479 | return (char *)loc->xl_header + offset; | |
1480 | } | |
1481 | ||
1482 | /* | |
1483 | * Block storage for xattrs keeps the name+value pairs compacted. When | |
1484 | * we remove one, we have to shift any that preceded it towards the end. | |
1485 | */ | |
1486 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1487 | { | |
1488 | int i, offset; | |
1489 | int namevalue_offset, first_namevalue_offset, namevalue_size; | |
1490 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1491 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1492 | u64 value_size = le64_to_cpu(entry->xe_value_size); | |
1493 | int count = le16_to_cpu(xh->xh_count); | |
1494 | ||
1495 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); | |
1496 | namevalue_size = OCFS2_XATTR_SIZE(entry->xe_name_len); | |
1497 | if (value_size > OCFS2_XATTR_INLINE_SIZE) | |
1498 | namevalue_size += OCFS2_XATTR_ROOT_SIZE; | |
1499 | else | |
1500 | namevalue_size += OCFS2_XATTR_SIZE(value_size); | |
1501 | ||
1502 | for (i = 0, first_namevalue_offset = loc->xl_size; | |
1503 | i < count; i++) { | |
1504 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1505 | if (offset < first_namevalue_offset) | |
1506 | first_namevalue_offset = offset; | |
1507 | } | |
1508 | ||
1509 | /* Shift the name+value pairs */ | |
1510 | memmove((char *)xh + first_namevalue_offset + namevalue_size, | |
1511 | (char *)xh + first_namevalue_offset, | |
1512 | namevalue_offset - first_namevalue_offset); | |
1513 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); | |
1514 | ||
1515 | /* Now tell xh->xh_entries about it */ | |
1516 | for (i = 0; i < count; i++) { | |
1517 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1518 | if (offset < namevalue_offset) | |
1519 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, | |
1520 | namevalue_size); | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * Note that we don't update xh_free_start or xh_name_value_len | |
1525 | * because they're not used in block-stored xattrs. | |
1526 | */ | |
1527 | } | |
1528 | ||
1529 | /* | |
1530 | * Operations for xattrs stored in blocks. This includes inline inode | |
1531 | * storage and unindexed ocfs2_xattr_blocks. | |
1532 | */ | |
1533 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { | |
1534 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, | |
1535 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, | |
1536 | }; | |
1537 | ||
1538 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, | |
1539 | int offset) | |
1540 | { | |
1541 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1542 | int block, block_offset; | |
1543 | ||
1544 | BUG_ON(offset >= OCFS2_XATTR_BUCKET_SIZE); | |
1545 | ||
1546 | /* The header is at the front of the bucket */ | |
1547 | block = offset >> bucket->bu_inode->i_sb->s_blocksize_bits; | |
1548 | block_offset = offset % bucket->bu_inode->i_sb->s_blocksize; | |
1549 | ||
1550 | return bucket_block(bucket, block) + block_offset; | |
1551 | } | |
1552 | ||
1553 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1554 | { | |
1555 | int namevalue_size; | |
1556 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1557 | u64 value_size = le64_to_cpu(entry->xe_value_size); | |
1558 | ||
1559 | namevalue_size = OCFS2_XATTR_SIZE(entry->xe_name_len); | |
1560 | if (value_size > OCFS2_XATTR_INLINE_SIZE) | |
1561 | namevalue_size += OCFS2_XATTR_ROOT_SIZE; | |
1562 | else | |
1563 | namevalue_size += OCFS2_XATTR_SIZE(value_size); | |
1564 | ||
1565 | le16_add_cpu(&loc->xl_header->xh_name_value_len, -namevalue_size); | |
1566 | } | |
1567 | ||
1568 | /* Operations for xattrs stored in buckets. */ | |
1569 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { | |
1570 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, | |
1571 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, | |
1572 | }; | |
1573 | ||
1574 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) | |
1575 | { | |
bde1e540 JB |
1576 | int index, count; |
1577 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1578 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1579 | ||
11179f2c | 1580 | ocfs2_xa_wipe_namevalue(loc); |
bde1e540 JB |
1581 | loc->xl_entry = NULL; |
1582 | ||
1583 | le16_add_cpu(&xh->xh_count, -1); | |
1584 | count = le16_to_cpu(xh->xh_count); | |
1585 | ||
1586 | /* | |
1587 | * Only zero out the entry if there are more remaining. This is | |
1588 | * important for an empty bucket, as it keeps track of the | |
1589 | * bucket's hash value. It doesn't hurt empty block storage. | |
1590 | */ | |
1591 | if (count) { | |
1592 | index = ((char *)entry - (char *)&xh->xh_entries) / | |
1593 | sizeof(struct ocfs2_xattr_entry); | |
1594 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], | |
1595 | (count - index) * sizeof(struct ocfs2_xattr_entry)); | |
1596 | memset(&xh->xh_entries[count], 0, | |
1597 | sizeof(struct ocfs2_xattr_entry)); | |
1598 | } | |
11179f2c JB |
1599 | } |
1600 | ||
1601 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, | |
1602 | struct inode *inode, | |
1603 | struct buffer_head *bh, | |
1604 | struct ocfs2_xattr_entry *entry) | |
1605 | { | |
1606 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; | |
1607 | ||
1608 | loc->xl_ops = &ocfs2_xa_block_loc_ops; | |
1609 | loc->xl_storage = bh; | |
1610 | loc->xl_entry = entry; | |
1611 | ||
1612 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1613 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); | |
1614 | else { | |
1615 | BUG_ON(entry); | |
1616 | loc->xl_size = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1617 | } | |
1618 | loc->xl_header = | |
1619 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - | |
1620 | loc->xl_size); | |
1621 | } | |
1622 | ||
1623 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, | |
1624 | struct buffer_head *bh, | |
1625 | struct ocfs2_xattr_entry *entry) | |
1626 | { | |
1627 | struct ocfs2_xattr_block *xb = | |
1628 | (struct ocfs2_xattr_block *)bh->b_data; | |
1629 | ||
1630 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); | |
1631 | ||
1632 | loc->xl_ops = &ocfs2_xa_block_loc_ops; | |
1633 | loc->xl_storage = bh; | |
1634 | loc->xl_header = &(xb->xb_attrs.xb_header); | |
1635 | loc->xl_entry = entry; | |
1636 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, | |
1637 | xb_attrs.xb_header); | |
1638 | } | |
1639 | ||
1640 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, | |
1641 | struct ocfs2_xattr_bucket *bucket, | |
1642 | struct ocfs2_xattr_entry *entry) | |
1643 | { | |
1644 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; | |
1645 | loc->xl_storage = bucket; | |
1646 | loc->xl_header = bucket_xh(bucket); | |
1647 | loc->xl_entry = entry; | |
1648 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; | |
1649 | } | |
1650 | ||
cf1d6c76 TY |
1651 | /* |
1652 | * ocfs2_xattr_set_entry_local() | |
1653 | * | |
1654 | * Set, replace or remove extended attribute in local. | |
1655 | */ | |
1656 | static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1657 | struct ocfs2_xattr_info *xi, | |
1658 | struct ocfs2_xattr_search *xs, | |
1659 | struct ocfs2_xattr_entry *last, | |
1660 | size_t min_offs) | |
1661 | { | |
6b240ff6 | 1662 | size_t name_len = strlen(xi->xi_name); |
11179f2c | 1663 | struct ocfs2_xa_loc loc; |
cf1d6c76 | 1664 | |
11179f2c JB |
1665 | if (xs->xattr_bh == xs->inode_bh) |
1666 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, | |
1667 | xs->not_found ? NULL : xs->here); | |
1668 | else | |
1669 | ocfs2_init_xattr_block_xa_loc(&loc, xs->xattr_bh, | |
1670 | xs->not_found ? NULL : xs->here); | |
6b240ff6 | 1671 | if (xi->xi_value && xs->not_found) { |
cf1d6c76 TY |
1672 | /* Insert the new xattr entry. */ |
1673 | le16_add_cpu(&xs->header->xh_count, 1); | |
6b240ff6 | 1674 | ocfs2_xattr_set_type(last, xi->xi_name_index); |
cf1d6c76 TY |
1675 | ocfs2_xattr_set_local(last, 1); |
1676 | last->xe_name_len = name_len; | |
1677 | } else { | |
1678 | void *first_val; | |
1679 | void *val; | |
1680 | size_t offs, size; | |
1681 | ||
1682 | first_val = xs->base + min_offs; | |
1683 | offs = le16_to_cpu(xs->here->xe_name_offset); | |
1684 | val = xs->base + offs; | |
1685 | ||
1686 | if (le64_to_cpu(xs->here->xe_value_size) > | |
1687 | OCFS2_XATTR_INLINE_SIZE) | |
1688 | size = OCFS2_XATTR_SIZE(name_len) + | |
1689 | OCFS2_XATTR_ROOT_SIZE; | |
1690 | else | |
1691 | size = OCFS2_XATTR_SIZE(name_len) + | |
1692 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1693 | ||
6b240ff6 JB |
1694 | if (xi->xi_value && size == OCFS2_XATTR_SIZE(name_len) + |
1695 | OCFS2_XATTR_SIZE(xi->xi_value_len)) { | |
cf1d6c76 TY |
1696 | /* The old and the new value have the |
1697 | same size. Just replace the value. */ | |
1698 | ocfs2_xattr_set_local(xs->here, 1); | |
6b240ff6 | 1699 | xs->here->xe_value_size = cpu_to_le64(xi->xi_value_len); |
cf1d6c76 TY |
1700 | /* Clear value bytes. */ |
1701 | memset(val + OCFS2_XATTR_SIZE(name_len), | |
1702 | 0, | |
6b240ff6 | 1703 | OCFS2_XATTR_SIZE(xi->xi_value_len)); |
cf1d6c76 | 1704 | memcpy(val + OCFS2_XATTR_SIZE(name_len), |
6b240ff6 JB |
1705 | xi->xi_value, |
1706 | xi->xi_value_len); | |
cf1d6c76 TY |
1707 | return; |
1708 | } | |
11179f2c | 1709 | |
6b240ff6 | 1710 | if (!xi->xi_value) |
bde1e540 JB |
1711 | ocfs2_xa_remove_entry(&loc); |
1712 | else | |
1713 | ocfs2_xa_wipe_namevalue(&loc); | |
cf1d6c76 TY |
1714 | |
1715 | min_offs += size; | |
cf1d6c76 | 1716 | } |
6b240ff6 | 1717 | if (xi->xi_value) { |
cf1d6c76 TY |
1718 | /* Insert the new name+value. */ |
1719 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
6b240ff6 | 1720 | OCFS2_XATTR_SIZE(xi->xi_value_len); |
cf1d6c76 TY |
1721 | void *val = xs->base + min_offs - size; |
1722 | ||
1723 | xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1724 | memset(val, 0, size); | |
6b240ff6 | 1725 | memcpy(val, xi->xi_name, name_len); |
cf1d6c76 | 1726 | memcpy(val + OCFS2_XATTR_SIZE(name_len), |
6b240ff6 JB |
1727 | xi->xi_value, |
1728 | xi->xi_value_len); | |
1729 | xs->here->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
cf1d6c76 TY |
1730 | ocfs2_xattr_set_local(xs->here, 1); |
1731 | ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1732 | } | |
1733 | ||
1734 | return; | |
1735 | } | |
1736 | ||
1737 | /* | |
1738 | * ocfs2_xattr_set_entry() | |
1739 | * | |
1740 | * Set extended attribute entry into inode or block. | |
1741 | * | |
1742 | * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1743 | * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1744 | * then set value in B tree with set_value_outside(). | |
1745 | */ | |
1746 | static int ocfs2_xattr_set_entry(struct inode *inode, | |
1747 | struct ocfs2_xattr_info *xi, | |
1748 | struct ocfs2_xattr_search *xs, | |
78f30c31 | 1749 | struct ocfs2_xattr_set_ctxt *ctxt, |
cf1d6c76 TY |
1750 | int flag) |
1751 | { | |
1752 | struct ocfs2_xattr_entry *last; | |
1753 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1754 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
6b240ff6 | 1755 | size_t min_offs = xs->end - xs->base, name_len = strlen(xi->xi_name); |
cf1d6c76 | 1756 | size_t size_l = 0; |
85db90e7 | 1757 | handle_t *handle = ctxt->handle; |
cf1d6c76 TY |
1758 | int free, i, ret; |
1759 | struct ocfs2_xattr_info xi_l = { | |
6b240ff6 JB |
1760 | .xi_name_index = xi->xi_name_index, |
1761 | .xi_name = xi->xi_name, | |
1762 | .xi_value = xi->xi_value, | |
1763 | .xi_value_len = xi->xi_value_len, | |
cf1d6c76 | 1764 | }; |
512620f4 JB |
1765 | struct ocfs2_xattr_value_buf vb = { |
1766 | .vb_bh = xs->xattr_bh, | |
1767 | .vb_access = ocfs2_journal_access_di, | |
1768 | }; | |
1769 | ||
1770 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1771 | BUG_ON(xs->xattr_bh == xs->inode_bh); | |
1772 | vb.vb_access = ocfs2_journal_access_xb; | |
1773 | } else | |
1774 | BUG_ON(xs->xattr_bh != xs->inode_bh); | |
cf1d6c76 TY |
1775 | |
1776 | /* Compute min_offs, last and free space. */ | |
1777 | last = xs->header->xh_entries; | |
1778 | ||
1779 | for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1780 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
1781 | if (offs < min_offs) | |
1782 | min_offs = offs; | |
1783 | last += 1; | |
1784 | } | |
1785 | ||
4442f518 | 1786 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
cf1d6c76 | 1787 | if (free < 0) |
b37c4d84 | 1788 | return -EIO; |
cf1d6c76 TY |
1789 | |
1790 | if (!xs->not_found) { | |
1791 | size_t size = 0; | |
1792 | if (ocfs2_xattr_is_local(xs->here)) | |
1793 | size = OCFS2_XATTR_SIZE(name_len) + | |
1794 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1795 | else | |
1796 | size = OCFS2_XATTR_SIZE(name_len) + | |
1797 | OCFS2_XATTR_ROOT_SIZE; | |
1798 | free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1799 | } | |
1800 | /* Check free space in inode or block */ | |
6b240ff6 | 1801 | if (xi->xi_value && xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
cf1d6c76 TY |
1802 | if (free < sizeof(struct ocfs2_xattr_entry) + |
1803 | OCFS2_XATTR_SIZE(name_len) + | |
1804 | OCFS2_XATTR_ROOT_SIZE) { | |
1805 | ret = -ENOSPC; | |
1806 | goto out; | |
1807 | } | |
1808 | size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
6b240ff6 JB |
1809 | xi_l.xi_value = (void *)&def_xv; |
1810 | xi_l.xi_value_len = OCFS2_XATTR_ROOT_SIZE; | |
1811 | } else if (xi->xi_value) { | |
cf1d6c76 TY |
1812 | if (free < sizeof(struct ocfs2_xattr_entry) + |
1813 | OCFS2_XATTR_SIZE(name_len) + | |
6b240ff6 | 1814 | OCFS2_XATTR_SIZE(xi->xi_value_len)) { |
cf1d6c76 TY |
1815 | ret = -ENOSPC; |
1816 | goto out; | |
1817 | } | |
1818 | } | |
1819 | ||
1820 | if (!xs->not_found) { | |
1821 | /* For existing extended attribute */ | |
1822 | size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1823 | OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1824 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1825 | void *val = xs->base + offs; | |
1826 | ||
1827 | if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1828 | /* Replace existing local xattr with tree root */ | |
1829 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
512620f4 | 1830 | ctxt, &vb, offs); |
cf1d6c76 TY |
1831 | if (ret < 0) |
1832 | mlog_errno(ret); | |
1833 | goto out; | |
1834 | } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1835 | /* For existing xattr which has value outside */ | |
512620f4 JB |
1836 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
1837 | (val + OCFS2_XATTR_SIZE(name_len)); | |
cf1d6c76 | 1838 | |
6b240ff6 | 1839 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
cf1d6c76 TY |
1840 | /* |
1841 | * If new value need set outside also, | |
1842 | * first truncate old value to new value, | |
1843 | * then set new value with set_value_outside(). | |
1844 | */ | |
1845 | ret = ocfs2_xattr_value_truncate(inode, | |
6b240ff6 JB |
1846 | &vb, |
1847 | xi->xi_value_len, | |
1848 | ctxt); | |
cf1d6c76 TY |
1849 | if (ret < 0) { |
1850 | mlog_errno(ret); | |
1851 | goto out; | |
1852 | } | |
1853 | ||
85db90e7 TM |
1854 | ret = ocfs2_xattr_update_entry(inode, |
1855 | handle, | |
1856 | xi, | |
1857 | xs, | |
0c748e95 | 1858 | &vb, |
85db90e7 | 1859 | offs); |
cf1d6c76 TY |
1860 | if (ret < 0) { |
1861 | mlog_errno(ret); | |
1862 | goto out; | |
1863 | } | |
1864 | ||
85db90e7 | 1865 | ret = __ocfs2_xattr_set_value_outside(inode, |
6b240ff6 JB |
1866 | handle, |
1867 | &vb, | |
1868 | xi->xi_value, | |
1869 | xi->xi_value_len); | |
cf1d6c76 TY |
1870 | if (ret < 0) |
1871 | mlog_errno(ret); | |
1872 | goto out; | |
1873 | } else { | |
1874 | /* | |
1875 | * If new value need set in local, | |
1876 | * just trucate old value to zero. | |
1877 | */ | |
1878 | ret = ocfs2_xattr_value_truncate(inode, | |
b3e5d379 | 1879 | &vb, |
85db90e7 TM |
1880 | 0, |
1881 | ctxt); | |
cf1d6c76 TY |
1882 | if (ret < 0) |
1883 | mlog_errno(ret); | |
1884 | } | |
1885 | } | |
1886 | } | |
1887 | ||
0cf2f763 | 1888 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), xs->inode_bh, |
512620f4 | 1889 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1890 | if (ret) { |
1891 | mlog_errno(ret); | |
85db90e7 | 1892 | goto out; |
cf1d6c76 TY |
1893 | } |
1894 | ||
1895 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
0cf2f763 | 1896 | ret = vb.vb_access(handle, INODE_CACHE(inode), vb.vb_bh, |
512620f4 | 1897 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
1898 | if (ret) { |
1899 | mlog_errno(ret); | |
85db90e7 | 1900 | goto out; |
cf1d6c76 TY |
1901 | } |
1902 | } | |
1903 | ||
1904 | /* | |
1905 | * Set value in local, include set tree root in local. | |
1906 | * This is the first step for value size >INLINE_SIZE. | |
1907 | */ | |
1908 | ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1909 | ||
1910 | if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1911 | ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1912 | if (ret < 0) { | |
1913 | mlog_errno(ret); | |
85db90e7 | 1914 | goto out; |
cf1d6c76 TY |
1915 | } |
1916 | } | |
1917 | ||
1918 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1919 | (flag & OCFS2_INLINE_XATTR_FL)) { | |
1920 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1921 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
1922 | ||
1923 | /* | |
1924 | * Adjust extent record count or inline data size | |
1925 | * to reserve space for extended attribute. | |
1926 | */ | |
1927 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1928 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1929 | le16_add_cpu(&idata->id_count, -xattrsize); | |
1930 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1931 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
1932 | le16_add_cpu(&el->l_count, -(xattrsize / | |
1933 | sizeof(struct ocfs2_extent_rec))); | |
1934 | } | |
1935 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1936 | } | |
1937 | /* Update xattr flag */ | |
1938 | spin_lock(&oi->ip_lock); | |
1939 | oi->ip_dyn_features |= flag; | |
1940 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1941 | spin_unlock(&oi->ip_lock); | |
cf1d6c76 TY |
1942 | |
1943 | ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1944 | if (ret < 0) | |
1945 | mlog_errno(ret); | |
1946 | ||
6b240ff6 | 1947 | if (!ret && xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
cf1d6c76 TY |
1948 | /* |
1949 | * Set value outside in B tree. | |
1950 | * This is the second step for value size > INLINE_SIZE. | |
1951 | */ | |
1952 | size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
512620f4 JB |
1953 | ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, |
1954 | &vb, offs); | |
cf1d6c76 TY |
1955 | if (ret < 0) { |
1956 | int ret2; | |
1957 | ||
1958 | mlog_errno(ret); | |
1959 | /* | |
1960 | * If set value outside failed, we have to clean | |
1961 | * the junk tree root we have already set in local. | |
1962 | */ | |
85db90e7 | 1963 | ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, |
512620f4 | 1964 | xi, xs, &vb, offs); |
cf1d6c76 TY |
1965 | if (ret2 < 0) |
1966 | mlog_errno(ret2); | |
1967 | } | |
1968 | } | |
1969 | out: | |
1970 | return ret; | |
cf1d6c76 TY |
1971 | } |
1972 | ||
ce9c5a54 TM |
1973 | /* |
1974 | * In xattr remove, if it is stored outside and refcounted, we may have | |
1975 | * the chance to split the refcount tree. So need the allocators. | |
1976 | */ | |
1977 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
1978 | struct ocfs2_xattr_value_root *xv, | |
1979 | struct ocfs2_caching_info *ref_ci, | |
1980 | struct buffer_head *ref_root_bh, | |
1981 | struct ocfs2_alloc_context **meta_ac, | |
1982 | int *ref_credits) | |
1983 | { | |
1984 | int ret, meta_add = 0; | |
1985 | u32 p_cluster, num_clusters; | |
1986 | unsigned int ext_flags; | |
1987 | ||
1988 | *ref_credits = 0; | |
1989 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
1990 | &num_clusters, | |
1991 | &xv->xr_list, | |
1992 | &ext_flags); | |
1993 | if (ret) { | |
1994 | mlog_errno(ret); | |
1995 | goto out; | |
1996 | } | |
1997 | ||
1998 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
1999 | goto out; | |
2000 | ||
2001 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
2002 | ref_root_bh, xv, | |
2003 | &meta_add, ref_credits); | |
2004 | if (ret) { | |
2005 | mlog_errno(ret); | |
2006 | goto out; | |
2007 | } | |
2008 | ||
2009 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
2010 | meta_add, meta_ac); | |
2011 | if (ret) | |
2012 | mlog_errno(ret); | |
2013 | ||
2014 | out: | |
2015 | return ret; | |
2016 | } | |
2017 | ||
cf1d6c76 | 2018 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 2019 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
2020 | struct ocfs2_xattr_header *header, |
2021 | struct ocfs2_caching_info *ref_ci, | |
2022 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 2023 | { |
ce9c5a54 | 2024 | int ret = 0, i, ref_credits; |
78f30c31 TM |
2025 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2026 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 2027 | void *val; |
78f30c31 TM |
2028 | |
2029 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
2030 | |
2031 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
2032 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
2033 | ||
ce9c5a54 TM |
2034 | if (ocfs2_xattr_is_local(entry)) |
2035 | continue; | |
cf1d6c76 | 2036 | |
ce9c5a54 TM |
2037 | val = (void *)header + |
2038 | le16_to_cpu(entry->xe_name_offset); | |
2039 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
2040 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
2041 | ||
2042 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
2043 | ref_ci, ref_root_bh, | |
2044 | &ctxt.meta_ac, | |
2045 | &ref_credits); | |
2046 | ||
2047 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
2048 | ocfs2_remove_extent_credits(osb->sb)); | |
2049 | if (IS_ERR(ctxt.handle)) { | |
2050 | ret = PTR_ERR(ctxt.handle); | |
2051 | mlog_errno(ret); | |
2052 | break; | |
2053 | } | |
2054 | ||
2055 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
2056 | if (ret < 0) { | |
2057 | mlog_errno(ret); | |
2058 | break; | |
2059 | } | |
2060 | ||
2061 | ocfs2_commit_trans(osb, ctxt.handle); | |
2062 | if (ctxt.meta_ac) { | |
2063 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2064 | ctxt.meta_ac = NULL; | |
cf1d6c76 TY |
2065 | } |
2066 | } | |
2067 | ||
ce9c5a54 TM |
2068 | if (ctxt.meta_ac) |
2069 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
2070 | ocfs2_schedule_truncate_log_flush(osb, 1); |
2071 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2072 | return ret; |
2073 | } | |
2074 | ||
2075 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
2076 | struct buffer_head *di_bh, |
2077 | struct ocfs2_caching_info *ref_ci, | |
2078 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2079 | { |
2080 | ||
2081 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2082 | struct ocfs2_xattr_header *header; | |
2083 | int ret; | |
4311901d JB |
2084 | struct ocfs2_xattr_value_buf vb = { |
2085 | .vb_bh = di_bh, | |
2086 | .vb_access = ocfs2_journal_access_di, | |
2087 | }; | |
cf1d6c76 TY |
2088 | |
2089 | header = (struct ocfs2_xattr_header *) | |
2090 | ((void *)di + inode->i_sb->s_blocksize - | |
2091 | le16_to_cpu(di->i_xattr_inline_size)); | |
2092 | ||
ce9c5a54 TM |
2093 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2094 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2095 | |
2096 | return ret; | |
2097 | } | |
2098 | ||
ce9c5a54 TM |
2099 | struct ocfs2_rm_xattr_bucket_para { |
2100 | struct ocfs2_caching_info *ref_ci; | |
2101 | struct buffer_head *ref_root_bh; | |
2102 | }; | |
2103 | ||
cf1d6c76 | 2104 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
2105 | struct buffer_head *blk_bh, |
2106 | struct ocfs2_caching_info *ref_ci, | |
2107 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2108 | { |
2109 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 2110 | int ret = 0; |
4311901d JB |
2111 | struct ocfs2_xattr_value_buf vb = { |
2112 | .vb_bh = blk_bh, | |
2113 | .vb_access = ocfs2_journal_access_xb, | |
2114 | }; | |
ce9c5a54 TM |
2115 | struct ocfs2_rm_xattr_bucket_para args = { |
2116 | .ref_ci = ref_ci, | |
2117 | .ref_root_bh = ref_root_bh, | |
2118 | }; | |
cf1d6c76 TY |
2119 | |
2120 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
2121 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
2122 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
2123 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2124 | ref_ci, ref_root_bh); | |
a3944256 | 2125 | } else |
47bca495 TM |
2126 | ret = ocfs2_iterate_xattr_index_block(inode, |
2127 | blk_bh, | |
2128 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 2129 | &args); |
cf1d6c76 TY |
2130 | |
2131 | return ret; | |
2132 | } | |
2133 | ||
08413899 | 2134 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
2135 | u64 block, |
2136 | struct ocfs2_caching_info *ref_ci, | |
2137 | struct buffer_head *ref_root_bh) | |
08413899 TM |
2138 | { |
2139 | struct inode *xb_alloc_inode; | |
2140 | struct buffer_head *xb_alloc_bh = NULL; | |
2141 | struct buffer_head *blk_bh = NULL; | |
2142 | struct ocfs2_xattr_block *xb; | |
2143 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2144 | handle_t *handle; | |
2145 | int ret = 0; | |
2146 | u64 blk, bg_blkno; | |
2147 | u16 bit; | |
2148 | ||
4ae1d69b | 2149 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
2150 | if (ret < 0) { |
2151 | mlog_errno(ret); | |
2152 | goto out; | |
2153 | } | |
2154 | ||
ce9c5a54 | 2155 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
2156 | if (ret < 0) { |
2157 | mlog_errno(ret); | |
2158 | goto out; | |
2159 | } | |
2160 | ||
4ae1d69b | 2161 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
2162 | blk = le64_to_cpu(xb->xb_blkno); |
2163 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
2164 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
2165 | ||
2166 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2167 | EXTENT_ALLOC_SYSTEM_INODE, | |
2168 | le16_to_cpu(xb->xb_suballoc_slot)); | |
2169 | if (!xb_alloc_inode) { | |
2170 | ret = -ENOMEM; | |
2171 | mlog_errno(ret); | |
2172 | goto out; | |
2173 | } | |
2174 | mutex_lock(&xb_alloc_inode->i_mutex); | |
2175 | ||
2176 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
2177 | if (ret < 0) { | |
2178 | mlog_errno(ret); | |
2179 | goto out_mutex; | |
2180 | } | |
2181 | ||
2182 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
2183 | if (IS_ERR(handle)) { | |
2184 | ret = PTR_ERR(handle); | |
2185 | mlog_errno(ret); | |
2186 | goto out_unlock; | |
2187 | } | |
2188 | ||
2189 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
2190 | bit, bg_blkno, 1); | |
2191 | if (ret < 0) | |
2192 | mlog_errno(ret); | |
2193 | ||
2194 | ocfs2_commit_trans(osb, handle); | |
2195 | out_unlock: | |
2196 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
2197 | brelse(xb_alloc_bh); | |
2198 | out_mutex: | |
2199 | mutex_unlock(&xb_alloc_inode->i_mutex); | |
2200 | iput(xb_alloc_inode); | |
2201 | out: | |
2202 | brelse(blk_bh); | |
2203 | return ret; | |
2204 | } | |
2205 | ||
cf1d6c76 TY |
2206 | /* |
2207 | * ocfs2_xattr_remove() | |
2208 | * | |
2209 | * Free extended attribute resources associated with this inode. | |
2210 | */ | |
2211 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2212 | { | |
cf1d6c76 TY |
2213 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2214 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2215 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2216 | struct buffer_head *ref_root_bh = NULL; | |
2217 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2218 | handle_t *handle; |
2219 | int ret; | |
2220 | ||
8154da3d TY |
2221 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2222 | return 0; | |
2223 | ||
cf1d6c76 TY |
2224 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2225 | return 0; | |
2226 | ||
ce9c5a54 TM |
2227 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL) { |
2228 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), | |
2229 | le64_to_cpu(di->i_refcount_loc), | |
2230 | 1, &ref_tree, &ref_root_bh); | |
2231 | if (ret) { | |
2232 | mlog_errno(ret); | |
2233 | goto out; | |
2234 | } | |
2235 | ref_ci = &ref_tree->rf_ci; | |
2236 | ||
2237 | } | |
2238 | ||
cf1d6c76 | 2239 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2240 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2241 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2242 | if (ret < 0) { |
2243 | mlog_errno(ret); | |
2244 | goto out; | |
2245 | } | |
2246 | } | |
cf1d6c76 | 2247 | |
08413899 TM |
2248 | if (di->i_xattr_loc) { |
2249 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2250 | le64_to_cpu(di->i_xattr_loc), |
2251 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2252 | if (ret < 0) { |
2253 | mlog_errno(ret); | |
2254 | goto out; | |
2255 | } | |
2256 | } | |
2257 | ||
2258 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2259 | OCFS2_INODE_UPDATE_CREDITS); | |
2260 | if (IS_ERR(handle)) { | |
2261 | ret = PTR_ERR(handle); | |
2262 | mlog_errno(ret); | |
2263 | goto out; | |
2264 | } | |
0cf2f763 | 2265 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2266 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2267 | if (ret) { |
2268 | mlog_errno(ret); | |
2269 | goto out_commit; | |
2270 | } | |
2271 | ||
08413899 | 2272 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2273 | |
2274 | spin_lock(&oi->ip_lock); | |
2275 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2276 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2277 | spin_unlock(&oi->ip_lock); | |
2278 | ||
2279 | ret = ocfs2_journal_dirty(handle, di_bh); | |
2280 | if (ret < 0) | |
2281 | mlog_errno(ret); | |
2282 | out_commit: | |
2283 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2284 | out: | |
ce9c5a54 TM |
2285 | if (ref_tree) |
2286 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2287 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2288 | return ret; |
2289 | } | |
2290 | ||
2291 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2292 | struct ocfs2_dinode *di) | |
2293 | { | |
2294 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2295 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2296 | int free; | |
2297 | ||
2298 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2299 | return 0; | |
2300 | ||
2301 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2302 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2303 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2304 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2305 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2306 | le64_to_cpu(di->i_size); | |
2307 | } else { | |
2308 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2309 | free = (le16_to_cpu(el->l_count) - | |
2310 | le16_to_cpu(el->l_next_free_rec)) * | |
2311 | sizeof(struct ocfs2_extent_rec); | |
2312 | } | |
2313 | if (free >= xattrsize) | |
2314 | return 1; | |
2315 | ||
2316 | return 0; | |
2317 | } | |
2318 | ||
2319 | /* | |
2320 | * ocfs2_xattr_ibody_find() | |
2321 | * | |
2322 | * Find extended attribute in inode block and | |
2323 | * fill search info into struct ocfs2_xattr_search. | |
2324 | */ | |
2325 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2326 | int name_index, | |
2327 | const char *name, | |
2328 | struct ocfs2_xattr_search *xs) | |
2329 | { | |
2330 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2331 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2332 | int ret; | |
2333 | int has_space = 0; | |
2334 | ||
2335 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2336 | return 0; | |
2337 | ||
2338 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2339 | down_read(&oi->ip_alloc_sem); | |
2340 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2341 | up_read(&oi->ip_alloc_sem); | |
2342 | if (!has_space) | |
2343 | return 0; | |
2344 | } | |
2345 | ||
2346 | xs->xattr_bh = xs->inode_bh; | |
2347 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2348 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2349 | xs->header = (struct ocfs2_xattr_header *) | |
2350 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2351 | else | |
2352 | xs->header = (struct ocfs2_xattr_header *) | |
2353 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2354 | xs->base = (void *)xs->header; | |
2355 | xs->here = xs->header->xh_entries; | |
2356 | ||
2357 | /* Find the named attribute. */ | |
2358 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2359 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2360 | if (ret && ret != -ENODATA) | |
2361 | return ret; | |
2362 | xs->not_found = ret; | |
2363 | } | |
2364 | ||
2365 | return 0; | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * ocfs2_xattr_ibody_set() | |
2370 | * | |
2371 | * Set, replace or remove an extended attribute into inode block. | |
2372 | * | |
2373 | */ | |
2374 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2375 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2376 | struct ocfs2_xattr_search *xs, |
2377 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2378 | { |
2379 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2380 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2381 | int ret; | |
2382 | ||
2383 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2384 | return -ENOSPC; | |
2385 | ||
2386 | down_write(&oi->ip_alloc_sem); | |
2387 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2388 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2389 | ret = -ENOSPC; | |
2390 | goto out; | |
2391 | } | |
2392 | } | |
2393 | ||
78f30c31 | 2394 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
cf1d6c76 TY |
2395 | (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
2396 | out: | |
2397 | up_write(&oi->ip_alloc_sem); | |
2398 | ||
2399 | return ret; | |
2400 | } | |
2401 | ||
2402 | /* | |
2403 | * ocfs2_xattr_block_find() | |
2404 | * | |
2405 | * Find extended attribute in external block and | |
2406 | * fill search info into struct ocfs2_xattr_search. | |
2407 | */ | |
2408 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2409 | int name_index, | |
2410 | const char *name, | |
2411 | struct ocfs2_xattr_search *xs) | |
2412 | { | |
2413 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2414 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2415 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2416 | int ret = 0; |
2417 | ||
2418 | if (!di->i_xattr_loc) | |
2419 | return ret; | |
2420 | ||
4ae1d69b JB |
2421 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2422 | &blk_bh); | |
cf1d6c76 TY |
2423 | if (ret < 0) { |
2424 | mlog_errno(ret); | |
2425 | return ret; | |
2426 | } | |
f6087fb7 | 2427 | |
cf1d6c76 | 2428 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2429 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2430 | |
2431 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2432 | xs->header = &xb->xb_attrs.xb_header; | |
2433 | xs->base = (void *)xs->header; | |
2434 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2435 | xs->here = xs->header->xh_entries; | |
2436 | ||
2437 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2438 | } else | |
2439 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2440 | name_index, | |
2441 | name, xs); | |
cf1d6c76 | 2442 | |
cf1d6c76 TY |
2443 | if (ret && ret != -ENODATA) { |
2444 | xs->xattr_bh = NULL; | |
2445 | goto cleanup; | |
2446 | } | |
2447 | xs->not_found = ret; | |
2448 | return 0; | |
cf1d6c76 TY |
2449 | cleanup: |
2450 | brelse(blk_bh); | |
2451 | ||
2452 | return ret; | |
2453 | } | |
2454 | ||
5aea1f0e TM |
2455 | static int ocfs2_create_xattr_block(handle_t *handle, |
2456 | struct inode *inode, | |
2457 | struct buffer_head *inode_bh, | |
2458 | struct ocfs2_alloc_context *meta_ac, | |
a7fe7a3a TM |
2459 | struct buffer_head **ret_bh, |
2460 | int indexed) | |
5aea1f0e TM |
2461 | { |
2462 | int ret; | |
2463 | u16 suballoc_bit_start; | |
2464 | u32 num_got; | |
2465 | u64 first_blkno; | |
2466 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; | |
2467 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2468 | struct buffer_head *new_bh = NULL; | |
2469 | struct ocfs2_xattr_block *xblk; | |
2470 | ||
2471 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), inode_bh, | |
2472 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2473 | if (ret < 0) { | |
2474 | mlog_errno(ret); | |
2475 | goto end; | |
2476 | } | |
2477 | ||
2478 | ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
2479 | &suballoc_bit_start, &num_got, | |
2480 | &first_blkno); | |
2481 | if (ret < 0) { | |
2482 | mlog_errno(ret); | |
2483 | goto end; | |
2484 | } | |
2485 | ||
2486 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
2487 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); | |
2488 | ||
2489 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), | |
2490 | new_bh, | |
2491 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2492 | if (ret < 0) { | |
2493 | mlog_errno(ret); | |
2494 | goto end; | |
2495 | } | |
2496 | ||
2497 | /* Initialize ocfs2_xattr_block */ | |
2498 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2499 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2500 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
b89c5428 | 2501 | xblk->xb_suballoc_slot = cpu_to_le16(meta_ac->ac_alloc_slot); |
5aea1f0e TM |
2502 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
2503 | xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
2504 | xblk->xb_blkno = cpu_to_le64(first_blkno); | |
2505 | ||
a7fe7a3a TM |
2506 | if (indexed) { |
2507 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2508 | xr->xt_clusters = cpu_to_le32(1); | |
2509 | xr->xt_last_eb_blk = 0; | |
2510 | xr->xt_list.l_tree_depth = 0; | |
2511 | xr->xt_list.l_count = cpu_to_le16( | |
2512 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2513 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2514 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2515 | } | |
2516 | ||
5aea1f0e TM |
2517 | ret = ocfs2_journal_dirty(handle, new_bh); |
2518 | if (ret < 0) { | |
2519 | mlog_errno(ret); | |
2520 | goto end; | |
2521 | } | |
2522 | di->i_xattr_loc = cpu_to_le64(first_blkno); | |
2523 | ocfs2_journal_dirty(handle, inode_bh); | |
2524 | ||
2525 | *ret_bh = new_bh; | |
2526 | new_bh = NULL; | |
2527 | ||
2528 | end: | |
2529 | brelse(new_bh); | |
2530 | return ret; | |
2531 | } | |
2532 | ||
cf1d6c76 TY |
2533 | /* |
2534 | * ocfs2_xattr_block_set() | |
2535 | * | |
2536 | * Set, replace or remove an extended attribute into external block. | |
2537 | * | |
2538 | */ | |
2539 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2540 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2541 | struct ocfs2_xattr_search *xs, |
2542 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2543 | { |
2544 | struct buffer_head *new_bh = NULL; | |
85db90e7 | 2545 | handle_t *handle = ctxt->handle; |
cf1d6c76 | 2546 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 TY |
2547 | int ret; |
2548 | ||
2549 | if (!xs->xattr_bh) { | |
5aea1f0e | 2550 | ret = ocfs2_create_xattr_block(handle, inode, xs->inode_bh, |
a7fe7a3a | 2551 | ctxt->meta_ac, &new_bh, 0); |
5aea1f0e | 2552 | if (ret) { |
cf1d6c76 | 2553 | mlog_errno(ret); |
85db90e7 | 2554 | goto end; |
cf1d6c76 TY |
2555 | } |
2556 | ||
cf1d6c76 | 2557 | xs->xattr_bh = new_bh; |
5aea1f0e | 2558 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2559 | xs->header = &xblk->xb_attrs.xb_header; |
2560 | xs->base = (void *)xs->header; | |
2561 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2562 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2563 | } else |
2564 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2565 | ||
2566 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2567 | /* Set extended attribute into external block */ | |
78f30c31 TM |
2568 | ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, |
2569 | OCFS2_HAS_XATTR_FL); | |
01225596 TM |
2570 | if (!ret || ret != -ENOSPC) |
2571 | goto end; | |
2572 | ||
78f30c31 | 2573 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); |
01225596 TM |
2574 | if (ret) |
2575 | goto end; | |
cf1d6c76 TY |
2576 | } |
2577 | ||
78f30c31 | 2578 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); |
01225596 TM |
2579 | |
2580 | end: | |
cf1d6c76 TY |
2581 | |
2582 | return ret; | |
2583 | } | |
2584 | ||
78f30c31 TM |
2585 | /* Check whether the new xattr can be inserted into the inode. */ |
2586 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
2587 | struct ocfs2_xattr_info *xi, | |
2588 | struct ocfs2_xattr_search *xs) | |
2589 | { | |
2590 | u64 value_size; | |
2591 | struct ocfs2_xattr_entry *last; | |
2592 | int free, i; | |
2593 | size_t min_offs = xs->end - xs->base; | |
2594 | ||
2595 | if (!xs->header) | |
2596 | return 0; | |
2597 | ||
2598 | last = xs->header->xh_entries; | |
2599 | ||
2600 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
2601 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
2602 | if (offs < min_offs) | |
2603 | min_offs = offs; | |
2604 | last += 1; | |
2605 | } | |
2606 | ||
4442f518 | 2607 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
2608 | if (free < 0) |
2609 | return 0; | |
2610 | ||
2611 | BUG_ON(!xs->not_found); | |
2612 | ||
6b240ff6 | 2613 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
78f30c31 TM |
2614 | value_size = OCFS2_XATTR_ROOT_SIZE; |
2615 | else | |
6b240ff6 | 2616 | value_size = OCFS2_XATTR_SIZE(xi->xi_value_len); |
78f30c31 TM |
2617 | |
2618 | if (free >= sizeof(struct ocfs2_xattr_entry) + | |
6b240ff6 | 2619 | OCFS2_XATTR_SIZE(strlen(xi->xi_name)) + value_size) |
78f30c31 TM |
2620 | return 1; |
2621 | ||
2622 | return 0; | |
2623 | } | |
2624 | ||
2625 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
2626 | struct ocfs2_dinode *di, | |
2627 | struct ocfs2_xattr_info *xi, | |
2628 | struct ocfs2_xattr_search *xis, | |
2629 | struct ocfs2_xattr_search *xbs, | |
2630 | int *clusters_need, | |
85db90e7 TM |
2631 | int *meta_need, |
2632 | int *credits_need) | |
78f30c31 TM |
2633 | { |
2634 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 2635 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
2636 | struct buffer_head *bh = NULL; |
2637 | struct ocfs2_xattr_block *xb = NULL; | |
2638 | struct ocfs2_xattr_entry *xe = NULL; | |
2639 | struct ocfs2_xattr_value_root *xv = NULL; | |
2640 | char *base = NULL; | |
2641 | int name_offset, name_len = 0; | |
2642 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
6b240ff6 | 2643 | xi->xi_value_len); |
78f30c31 TM |
2644 | u64 value_size; |
2645 | ||
71d548a6 TM |
2646 | /* |
2647 | * Calculate the clusters we need to write. | |
2648 | * No matter whether we replace an old one or add a new one, | |
2649 | * we need this for writing. | |
2650 | */ | |
6b240ff6 | 2651 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
71d548a6 TM |
2652 | credits += new_clusters * |
2653 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
2654 | ||
78f30c31 | 2655 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
2656 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2657 | ||
6b240ff6 | 2658 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 | 2659 | clusters_add += new_clusters; |
85db90e7 TM |
2660 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2661 | &def_xv.xv.xr_list, | |
2662 | new_clusters); | |
2663 | } | |
78f30c31 TM |
2664 | |
2665 | goto meta_guess; | |
2666 | } | |
2667 | ||
2668 | if (!xis->not_found) { | |
2669 | xe = xis->here; | |
2670 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2671 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2672 | base = xis->base; | |
85db90e7 | 2673 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 2674 | } else { |
970e4936 | 2675 | int i, block_off = 0; |
78f30c31 TM |
2676 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
2677 | xe = xbs->here; | |
2678 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
2679 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
2680 | i = xbs->here - xbs->header->xh_entries; | |
2681 | old_in_xb = 1; | |
2682 | ||
2683 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 2684 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
2685 | bucket_xh(xbs->bucket), |
2686 | i, &block_off, | |
2687 | &name_offset); | |
2688 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
2689 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
2690 | } else { | |
78f30c31 | 2691 | base = xbs->base; |
85db90e7 TM |
2692 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
2693 | } | |
2694 | } | |
2695 | ||
2696 | /* | |
2697 | * delete a xattr doesn't need metadata and cluster allocation. | |
2698 | * so just calculate the credits and return. | |
2699 | * | |
2700 | * The credits for removing the value tree will be extended | |
2701 | * by ocfs2_remove_extent itself. | |
2702 | */ | |
6b240ff6 | 2703 | if (!xi->xi_value) { |
85db90e7 | 2704 | if (!ocfs2_xattr_is_local(xe)) |
a90714c1 | 2705 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
2706 | |
2707 | goto out; | |
78f30c31 TM |
2708 | } |
2709 | ||
2710 | /* do cluster allocation guess first. */ | |
2711 | value_size = le64_to_cpu(xe->xe_value_size); | |
2712 | ||
2713 | if (old_in_xb) { | |
2714 | /* | |
2715 | * In xattr set, we always try to set the xe in inode first, | |
2716 | * so if it can be inserted into inode successfully, the old | |
2717 | * one will be removed from the xattr block, and this xattr | |
2718 | * will be inserted into inode as a new xattr in inode. | |
2719 | */ | |
2720 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
2721 | clusters_add += new_clusters; | |
a90714c1 | 2722 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
2723 | OCFS2_INODE_UPDATE_CREDITS; |
2724 | if (!ocfs2_xattr_is_local(xe)) | |
2725 | credits += ocfs2_calc_extend_credits( | |
2726 | inode->i_sb, | |
2727 | &def_xv.xv.xr_list, | |
2728 | new_clusters); | |
78f30c31 TM |
2729 | goto out; |
2730 | } | |
2731 | } | |
2732 | ||
6b240ff6 | 2733 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 TM |
2734 | /* the new values will be stored outside. */ |
2735 | u32 old_clusters = 0; | |
2736 | ||
2737 | if (!ocfs2_xattr_is_local(xe)) { | |
2738 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
2739 | value_size); | |
2740 | xv = (struct ocfs2_xattr_value_root *) | |
2741 | (base + name_offset + name_len); | |
97aff52a | 2742 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
2743 | } else |
2744 | xv = &def_xv.xv; | |
2745 | ||
85db90e7 | 2746 | if (old_clusters >= new_clusters) { |
a90714c1 | 2747 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 2748 | goto out; |
85db90e7 | 2749 | } else { |
78f30c31 TM |
2750 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
2751 | clusters_add += new_clusters - old_clusters; | |
85db90e7 TM |
2752 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2753 | &xv->xr_list, | |
2754 | new_clusters - | |
2755 | old_clusters); | |
97aff52a TM |
2756 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
2757 | goto out; | |
78f30c31 TM |
2758 | } |
2759 | } else { | |
2760 | /* | |
2761 | * Now the new value will be stored inside. So if the new | |
2762 | * value is smaller than the size of value root or the old | |
2763 | * value, we don't need any allocation, otherwise we have | |
2764 | * to guess metadata allocation. | |
2765 | */ | |
6b240ff6 JB |
2766 | if ((ocfs2_xattr_is_local(xe) && |
2767 | (value_size >= xi->xi_value_len)) || | |
78f30c31 | 2768 | (!ocfs2_xattr_is_local(xe) && |
6b240ff6 | 2769 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
78f30c31 TM |
2770 | goto out; |
2771 | } | |
2772 | ||
2773 | meta_guess: | |
2774 | /* calculate metadata allocation. */ | |
2775 | if (di->i_xattr_loc) { | |
2776 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
2777 | ret = ocfs2_read_xattr_block(inode, |
2778 | le64_to_cpu(di->i_xattr_loc), | |
2779 | &bh); | |
78f30c31 TM |
2780 | if (ret) { |
2781 | mlog_errno(ret); | |
2782 | goto out; | |
2783 | } | |
2784 | ||
2785 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
2786 | } else | |
2787 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
2788 | ||
90cb546c TM |
2789 | /* |
2790 | * If there is already an xattr tree, good, we can calculate | |
2791 | * like other b-trees. Otherwise we may have the chance of | |
2792 | * create a tree, the credit calculation is borrowed from | |
2793 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
2794 | * new tree will be cluster based, so no meta is needed. | |
2795 | */ | |
78f30c31 TM |
2796 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
2797 | struct ocfs2_extent_list *el = | |
2798 | &xb->xb_attrs.xb_root.xt_list; | |
2799 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 TM |
2800 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
2801 | el, 1); | |
90cb546c TM |
2802 | } else |
2803 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
2804 | |
2805 | /* | |
2806 | * This cluster will be used either for new bucket or for | |
2807 | * new xattr block. | |
2808 | * If the cluster size is the same as the bucket size, one | |
2809 | * more is needed since we may need to extend the bucket | |
2810 | * also. | |
2811 | */ | |
2812 | clusters_add += 1; | |
85db90e7 | 2813 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 2814 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
2815 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
2816 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 2817 | clusters_add += 1; |
85db90e7 TM |
2818 | } |
2819 | } else { | |
78f30c31 | 2820 | meta_add += 1; |
85db90e7 TM |
2821 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
2822 | } | |
78f30c31 TM |
2823 | out: |
2824 | if (clusters_need) | |
2825 | *clusters_need = clusters_add; | |
2826 | if (meta_need) | |
2827 | *meta_need = meta_add; | |
85db90e7 TM |
2828 | if (credits_need) |
2829 | *credits_need = credits; | |
78f30c31 TM |
2830 | brelse(bh); |
2831 | return ret; | |
2832 | } | |
2833 | ||
2834 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
2835 | struct ocfs2_dinode *di, | |
2836 | struct ocfs2_xattr_info *xi, | |
2837 | struct ocfs2_xattr_search *xis, | |
2838 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 2839 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 2840 | int extra_meta, |
85db90e7 | 2841 | int *credits) |
78f30c31 TM |
2842 | { |
2843 | int clusters_add, meta_add, ret; | |
2844 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2845 | ||
2846 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
2847 | ||
2848 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
2849 | ||
2850 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 2851 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
2852 | if (ret) { |
2853 | mlog_errno(ret); | |
2854 | return ret; | |
2855 | } | |
2856 | ||
492a8a33 | 2857 | meta_add += extra_meta; |
85db90e7 | 2858 | mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " |
6b240ff6 | 2859 | "credits = %d\n", xi->xi_name, meta_add, clusters_add, *credits); |
78f30c31 TM |
2860 | |
2861 | if (meta_add) { | |
2862 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
2863 | &ctxt->meta_ac); | |
2864 | if (ret) { | |
2865 | mlog_errno(ret); | |
2866 | goto out; | |
2867 | } | |
2868 | } | |
2869 | ||
2870 | if (clusters_add) { | |
2871 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
2872 | if (ret) | |
2873 | mlog_errno(ret); | |
2874 | } | |
2875 | out: | |
2876 | if (ret) { | |
2877 | if (ctxt->meta_ac) { | |
2878 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
2879 | ctxt->meta_ac = NULL; | |
2880 | } | |
2881 | ||
2882 | /* | |
2883 | * We cannot have an error and a non null ctxt->data_ac. | |
2884 | */ | |
2885 | } | |
2886 | ||
2887 | return ret; | |
2888 | } | |
2889 | ||
85db90e7 TM |
2890 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
2891 | struct ocfs2_dinode *di, | |
2892 | struct ocfs2_xattr_info *xi, | |
2893 | struct ocfs2_xattr_search *xis, | |
2894 | struct ocfs2_xattr_search *xbs, | |
2895 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2896 | { | |
9f868f16 | 2897 | int ret = 0, credits, old_found; |
85db90e7 | 2898 | |
6b240ff6 | 2899 | if (!xi->xi_value) { |
85db90e7 TM |
2900 | /* Remove existing extended attribute */ |
2901 | if (!xis->not_found) | |
2902 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2903 | else if (!xbs->not_found) | |
2904 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2905 | } else { | |
2906 | /* We always try to set extended attribute into inode first*/ | |
2907 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
2908 | if (!ret && !xbs->not_found) { | |
2909 | /* | |
2910 | * If succeed and that extended attribute existing in | |
2911 | * external block, then we will remove it. | |
2912 | */ | |
6b240ff6 JB |
2913 | xi->xi_value = NULL; |
2914 | xi->xi_value_len = 0; | |
85db90e7 | 2915 | |
9f868f16 | 2916 | old_found = xis->not_found; |
85db90e7 TM |
2917 | xis->not_found = -ENODATA; |
2918 | ret = ocfs2_calc_xattr_set_need(inode, | |
2919 | di, | |
2920 | xi, | |
2921 | xis, | |
2922 | xbs, | |
2923 | NULL, | |
2924 | NULL, | |
2925 | &credits); | |
9f868f16 | 2926 | xis->not_found = old_found; |
85db90e7 TM |
2927 | if (ret) { |
2928 | mlog_errno(ret); | |
2929 | goto out; | |
2930 | } | |
2931 | ||
2932 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2933 | ctxt->handle->h_buffer_credits); | |
2934 | if (ret) { | |
2935 | mlog_errno(ret); | |
2936 | goto out; | |
2937 | } | |
2938 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2939 | } else if (ret == -ENOSPC) { | |
2940 | if (di->i_xattr_loc && !xbs->xattr_bh) { | |
2941 | ret = ocfs2_xattr_block_find(inode, | |
6b240ff6 JB |
2942 | xi->xi_name_index, |
2943 | xi->xi_name, xbs); | |
85db90e7 TM |
2944 | if (ret) |
2945 | goto out; | |
2946 | ||
9f868f16 | 2947 | old_found = xis->not_found; |
85db90e7 TM |
2948 | xis->not_found = -ENODATA; |
2949 | ret = ocfs2_calc_xattr_set_need(inode, | |
2950 | di, | |
2951 | xi, | |
2952 | xis, | |
2953 | xbs, | |
2954 | NULL, | |
2955 | NULL, | |
2956 | &credits); | |
9f868f16 | 2957 | xis->not_found = old_found; |
85db90e7 TM |
2958 | if (ret) { |
2959 | mlog_errno(ret); | |
2960 | goto out; | |
2961 | } | |
2962 | ||
2963 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2964 | ctxt->handle->h_buffer_credits); | |
2965 | if (ret) { | |
2966 | mlog_errno(ret); | |
2967 | goto out; | |
2968 | } | |
2969 | } | |
2970 | /* | |
2971 | * If no space in inode, we will set extended attribute | |
2972 | * into external block. | |
2973 | */ | |
2974 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
2975 | if (ret) | |
2976 | goto out; | |
2977 | if (!xis->not_found) { | |
2978 | /* | |
2979 | * If succeed and that extended attribute | |
2980 | * existing in inode, we will remove it. | |
2981 | */ | |
6b240ff6 JB |
2982 | xi->xi_value = NULL; |
2983 | xi->xi_value_len = 0; | |
85db90e7 TM |
2984 | xbs->not_found = -ENODATA; |
2985 | ret = ocfs2_calc_xattr_set_need(inode, | |
2986 | di, | |
2987 | xi, | |
2988 | xis, | |
2989 | xbs, | |
2990 | NULL, | |
2991 | NULL, | |
2992 | &credits); | |
2993 | if (ret) { | |
2994 | mlog_errno(ret); | |
2995 | goto out; | |
2996 | } | |
2997 | ||
2998 | ret = ocfs2_extend_trans(ctxt->handle, credits + | |
2999 | ctxt->handle->h_buffer_credits); | |
3000 | if (ret) { | |
3001 | mlog_errno(ret); | |
3002 | goto out; | |
3003 | } | |
3004 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
3005 | xis, ctxt); | |
3006 | } | |
3007 | } | |
3008 | } | |
3009 | ||
4b3f6209 TM |
3010 | if (!ret) { |
3011 | /* Update inode ctime. */ | |
0cf2f763 | 3012 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
3013 | xis->inode_bh, |
3014 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
3015 | if (ret) { |
3016 | mlog_errno(ret); | |
3017 | goto out; | |
3018 | } | |
3019 | ||
3020 | inode->i_ctime = CURRENT_TIME; | |
3021 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
3022 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
3023 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
3024 | } | |
85db90e7 TM |
3025 | out: |
3026 | return ret; | |
3027 | } | |
3028 | ||
6c3faba4 TY |
3029 | /* |
3030 | * This function only called duing creating inode | |
3031 | * for init security/acl xattrs of the new inode. | |
008aafaf | 3032 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
3033 | */ |
3034 | int ocfs2_xattr_set_handle(handle_t *handle, | |
3035 | struct inode *inode, | |
3036 | struct buffer_head *di_bh, | |
3037 | int name_index, | |
3038 | const char *name, | |
3039 | const void *value, | |
3040 | size_t value_len, | |
3041 | int flags, | |
3042 | struct ocfs2_alloc_context *meta_ac, | |
3043 | struct ocfs2_alloc_context *data_ac) | |
3044 | { | |
3045 | struct ocfs2_dinode *di; | |
3046 | int ret; | |
3047 | ||
3048 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3049 | .xi_name_index = name_index, |
3050 | .xi_name = name, | |
3051 | .xi_value = value, | |
3052 | .xi_value_len = value_len, | |
6c3faba4 TY |
3053 | }; |
3054 | ||
3055 | struct ocfs2_xattr_search xis = { | |
3056 | .not_found = -ENODATA, | |
3057 | }; | |
3058 | ||
3059 | struct ocfs2_xattr_search xbs = { | |
3060 | .not_found = -ENODATA, | |
3061 | }; | |
3062 | ||
3063 | struct ocfs2_xattr_set_ctxt ctxt = { | |
3064 | .handle = handle, | |
3065 | .meta_ac = meta_ac, | |
3066 | .data_ac = data_ac, | |
3067 | }; | |
3068 | ||
3069 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
3070 | return -EOPNOTSUPP; | |
3071 | ||
008aafaf TY |
3072 | /* |
3073 | * In extreme situation, may need xattr bucket when | |
3074 | * block size is too small. And we have already reserved | |
3075 | * the credits for bucket in mknod. | |
3076 | */ | |
3077 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
3078 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3079 | if (!xbs.bucket) { | |
3080 | mlog_errno(-ENOMEM); | |
3081 | return -ENOMEM; | |
3082 | } | |
3083 | } | |
3084 | ||
6c3faba4 TY |
3085 | xis.inode_bh = xbs.inode_bh = di_bh; |
3086 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3087 | ||
3088 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3089 | ||
3090 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3091 | if (ret) | |
3092 | goto cleanup; | |
3093 | if (xis.not_found) { | |
3094 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3095 | if (ret) | |
3096 | goto cleanup; | |
3097 | } | |
3098 | ||
3099 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3100 | ||
3101 | cleanup: | |
3102 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3103 | brelse(xbs.xattr_bh); | |
008aafaf | 3104 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
3105 | |
3106 | return ret; | |
3107 | } | |
3108 | ||
cf1d6c76 TY |
3109 | /* |
3110 | * ocfs2_xattr_set() | |
3111 | * | |
3112 | * Set, replace or remove an extended attribute for this inode. | |
3113 | * value is NULL to remove an existing extended attribute, else either | |
3114 | * create or replace an extended attribute. | |
3115 | */ | |
3116 | int ocfs2_xattr_set(struct inode *inode, | |
3117 | int name_index, | |
3118 | const char *name, | |
3119 | const void *value, | |
3120 | size_t value_len, | |
3121 | int flags) | |
3122 | { | |
3123 | struct buffer_head *di_bh = NULL; | |
3124 | struct ocfs2_dinode *di; | |
492a8a33 | 3125 | int ret, credits, ref_meta = 0, ref_credits = 0; |
78f30c31 | 3126 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 3127 | struct inode *tl_inode = osb->osb_tl_inode; |
78f30c31 | 3128 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; |
492a8a33 | 3129 | struct ocfs2_refcount_tree *ref_tree = NULL; |
cf1d6c76 TY |
3130 | |
3131 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3132 | .xi_name_index = name_index, |
3133 | .xi_name = name, | |
3134 | .xi_value = value, | |
3135 | .xi_value_len = value_len, | |
cf1d6c76 TY |
3136 | }; |
3137 | ||
3138 | struct ocfs2_xattr_search xis = { | |
3139 | .not_found = -ENODATA, | |
3140 | }; | |
3141 | ||
3142 | struct ocfs2_xattr_search xbs = { | |
3143 | .not_found = -ENODATA, | |
3144 | }; | |
3145 | ||
8154da3d TY |
3146 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
3147 | return -EOPNOTSUPP; | |
3148 | ||
ba937127 JB |
3149 | /* |
3150 | * Only xbs will be used on indexed trees. xis doesn't need a | |
3151 | * bucket. | |
3152 | */ | |
3153 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3154 | if (!xbs.bucket) { | |
3155 | mlog_errno(-ENOMEM); | |
3156 | return -ENOMEM; | |
3157 | } | |
3158 | ||
cf1d6c76 TY |
3159 | ret = ocfs2_inode_lock(inode, &di_bh, 1); |
3160 | if (ret < 0) { | |
3161 | mlog_errno(ret); | |
ba937127 | 3162 | goto cleanup_nolock; |
cf1d6c76 TY |
3163 | } |
3164 | xis.inode_bh = xbs.inode_bh = di_bh; | |
3165 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3166 | ||
3167 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3168 | /* | |
3169 | * Scan inode and external block to find the same name | |
3170 | * extended attribute and collect search infomation. | |
3171 | */ | |
3172 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3173 | if (ret) | |
3174 | goto cleanup; | |
3175 | if (xis.not_found) { | |
3176 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3177 | if (ret) | |
3178 | goto cleanup; | |
3179 | } | |
3180 | ||
3181 | if (xis.not_found && xbs.not_found) { | |
3182 | ret = -ENODATA; | |
3183 | if (flags & XATTR_REPLACE) | |
3184 | goto cleanup; | |
3185 | ret = 0; | |
3186 | if (!value) | |
3187 | goto cleanup; | |
3188 | } else { | |
3189 | ret = -EEXIST; | |
3190 | if (flags & XATTR_CREATE) | |
3191 | goto cleanup; | |
3192 | } | |
3193 | ||
492a8a33 TM |
3194 | /* Check whether the value is refcounted and do some prepartion. */ |
3195 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL && | |
3196 | (!xis.not_found || !xbs.not_found)) { | |
3197 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
3198 | &xis, &xbs, &ref_tree, | |
3199 | &ref_meta, &ref_credits); | |
3200 | if (ret) { | |
3201 | mlog_errno(ret); | |
3202 | goto cleanup; | |
3203 | } | |
3204 | } | |
85db90e7 TM |
3205 | |
3206 | mutex_lock(&tl_inode->i_mutex); | |
3207 | ||
3208 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
3209 | ret = __ocfs2_flush_truncate_log(osb); | |
3210 | if (ret < 0) { | |
3211 | mutex_unlock(&tl_inode->i_mutex); | |
3212 | mlog_errno(ret); | |
3213 | goto cleanup; | |
3214 | } | |
3215 | } | |
3216 | mutex_unlock(&tl_inode->i_mutex); | |
3217 | ||
3218 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3219 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3220 | if (ret) { |
3221 | mlog_errno(ret); | |
3222 | goto cleanup; | |
3223 | } | |
3224 | ||
4b3f6209 TM |
3225 | /* we need to update inode's ctime field, so add credit for it. */ |
3226 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3227 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3228 | if (IS_ERR(ctxt.handle)) { |
3229 | ret = PTR_ERR(ctxt.handle); | |
3230 | mlog_errno(ret); | |
3231 | goto cleanup; | |
cf1d6c76 | 3232 | } |
85db90e7 TM |
3233 | |
3234 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3235 | ||
3236 | ocfs2_commit_trans(osb, ctxt.handle); | |
3237 | ||
78f30c31 TM |
3238 | if (ctxt.data_ac) |
3239 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3240 | if (ctxt.meta_ac) | |
3241 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3242 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3243 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3244 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3245 | |
cf1d6c76 | 3246 | cleanup: |
492a8a33 TM |
3247 | if (ref_tree) |
3248 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3249 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3250 | if (!value && !ret) { |
3251 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3252 | if (ret) | |
3253 | mlog_errno(ret); | |
3254 | } | |
cf1d6c76 | 3255 | ocfs2_inode_unlock(inode, 1); |
ba937127 | 3256 | cleanup_nolock: |
cf1d6c76 TY |
3257 | brelse(di_bh); |
3258 | brelse(xbs.xattr_bh); | |
ba937127 | 3259 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3260 | |
3261 | return ret; | |
3262 | } | |
3263 | ||
0c044f0b TM |
3264 | /* |
3265 | * Find the xattr extent rec which may contains name_hash. | |
3266 | * e_cpos will be the first name hash of the xattr rec. | |
3267 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3268 | */ | |
3269 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3270 | u32 name_hash, | |
3271 | u64 *p_blkno, | |
3272 | u32 *e_cpos, | |
3273 | u32 *num_clusters, | |
3274 | struct ocfs2_extent_list *el) | |
3275 | { | |
3276 | int ret = 0, i; | |
3277 | struct buffer_head *eb_bh = NULL; | |
3278 | struct ocfs2_extent_block *eb; | |
3279 | struct ocfs2_extent_rec *rec = NULL; | |
3280 | u64 e_blkno = 0; | |
3281 | ||
3282 | if (el->l_tree_depth) { | |
facdb77f JB |
3283 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3284 | &eb_bh); | |
0c044f0b TM |
3285 | if (ret) { |
3286 | mlog_errno(ret); | |
3287 | goto out; | |
3288 | } | |
3289 | ||
3290 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3291 | el = &eb->h_list; | |
3292 | ||
3293 | if (el->l_tree_depth) { | |
3294 | ocfs2_error(inode->i_sb, | |
3295 | "Inode %lu has non zero tree depth in " | |
3296 | "xattr tree block %llu\n", inode->i_ino, | |
3297 | (unsigned long long)eb_bh->b_blocknr); | |
3298 | ret = -EROFS; | |
3299 | goto out; | |
3300 | } | |
3301 | } | |
3302 | ||
3303 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3304 | rec = &el->l_recs[i]; | |
3305 | ||
3306 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3307 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3308 | break; | |
3309 | } | |
3310 | } | |
3311 | ||
3312 | if (!e_blkno) { | |
3313 | ocfs2_error(inode->i_sb, "Inode %lu has bad extent " | |
3314 | "record (%u, %u, 0) in xattr", inode->i_ino, | |
3315 | le32_to_cpu(rec->e_cpos), | |
3316 | ocfs2_rec_clusters(el, rec)); | |
3317 | ret = -EROFS; | |
3318 | goto out; | |
3319 | } | |
3320 | ||
3321 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3322 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3323 | if (e_cpos) | |
3324 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3325 | out: | |
3326 | brelse(eb_bh); | |
3327 | return ret; | |
3328 | } | |
3329 | ||
3330 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3331 | struct ocfs2_xattr_bucket *bucket, | |
3332 | void *para); | |
3333 | ||
589dc260 | 3334 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3335 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3336 | int name_index, |
3337 | const char *name, | |
3338 | u32 name_hash, | |
3339 | u16 *xe_index, | |
3340 | int *found) | |
3341 | { | |
3342 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3343 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3344 | size_t name_len = strlen(name); |
3345 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3346 | char *xe_name; |
3347 | ||
3348 | /* | |
3349 | * We don't use binary search in the bucket because there | |
3350 | * may be multiple entries with the same name hash. | |
3351 | */ | |
3352 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3353 | xe = &xh->xh_entries[i]; | |
3354 | ||
3355 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3356 | continue; | |
3357 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3358 | break; | |
3359 | ||
3360 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3361 | if (!cmp) | |
3362 | cmp = name_len - xe->xe_name_len; | |
3363 | if (cmp) | |
3364 | continue; | |
3365 | ||
fd68a894 | 3366 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3367 | xh, |
3368 | i, | |
3369 | &block_off, | |
3370 | &new_offset); | |
3371 | if (ret) { | |
3372 | mlog_errno(ret); | |
3373 | break; | |
3374 | } | |
3375 | ||
970e4936 | 3376 | |
e2356a3f JB |
3377 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3378 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3379 | *xe_index = i; |
3380 | *found = 1; | |
3381 | ret = 0; | |
3382 | break; | |
3383 | } | |
3384 | } | |
3385 | ||
3386 | return ret; | |
3387 | } | |
3388 | ||
3389 | /* | |
3390 | * Find the specified xattr entry in a series of buckets. | |
3391 | * This series start from p_blkno and last for num_clusters. | |
3392 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3393 | * the num of the valid buckets. | |
3394 | * | |
3395 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3396 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3397 | */ | |
3398 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3399 | int name_index, | |
3400 | const char *name, | |
3401 | u32 name_hash, | |
3402 | u64 p_blkno, | |
3403 | u32 first_hash, | |
3404 | u32 num_clusters, | |
3405 | struct ocfs2_xattr_search *xs) | |
3406 | { | |
3407 | int ret, found = 0; | |
589dc260 TM |
3408 | struct ocfs2_xattr_header *xh = NULL; |
3409 | struct ocfs2_xattr_entry *xe = NULL; | |
3410 | u16 index = 0; | |
3411 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3412 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3413 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3414 | u32 last_hash; |
e2356a3f | 3415 | u64 blkno, lower_blkno = 0; |
589dc260 | 3416 | |
e2356a3f JB |
3417 | search = ocfs2_xattr_bucket_new(inode); |
3418 | if (!search) { | |
3419 | ret = -ENOMEM; | |
3420 | mlog_errno(ret); | |
3421 | goto out; | |
3422 | } | |
3423 | ||
3424 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3425 | if (ret) { |
3426 | mlog_errno(ret); | |
3427 | goto out; | |
3428 | } | |
3429 | ||
e2356a3f | 3430 | xh = bucket_xh(search); |
589dc260 | 3431 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3432 | while (low_bucket <= high_bucket) { |
e2356a3f | 3433 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3434 | |
e2356a3f | 3435 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3436 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3437 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3438 | if (ret) { |
3439 | mlog_errno(ret); | |
3440 | goto out; | |
3441 | } | |
3442 | ||
e2356a3f | 3443 | xh = bucket_xh(search); |
589dc260 TM |
3444 | xe = &xh->xh_entries[0]; |
3445 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3446 | high_bucket = bucket - 1; | |
3447 | continue; | |
3448 | } | |
3449 | ||
3450 | /* | |
3451 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3452 | * bucket is larger than the search one. for an empty |
3453 | * bucket, the last one is also the first one. | |
589dc260 | 3454 | */ |
5a095611 TM |
3455 | if (xh->xh_count) |
3456 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3457 | ||
589dc260 TM |
3458 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3459 | ||
e2356a3f JB |
3460 | /* record lower_blkno which may be the insert place. */ |
3461 | lower_blkno = blkno; | |
589dc260 TM |
3462 | |
3463 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3464 | low_bucket = bucket + 1; | |
3465 | continue; | |
3466 | } | |
3467 | ||
3468 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3469 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3470 | name_index, name, name_hash, |
3471 | &index, &found); | |
3472 | if (ret) { | |
3473 | mlog_errno(ret); | |
3474 | goto out; | |
3475 | } | |
3476 | break; | |
3477 | } | |
3478 | ||
3479 | /* | |
3480 | * Record the bucket we have found. | |
3481 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3482 | * always set it to the previous bucket. | |
3483 | */ | |
e2356a3f JB |
3484 | if (!lower_blkno) |
3485 | lower_blkno = p_blkno; | |
3486 | ||
3487 | /* This should be in cache - we just read it during the search */ | |
3488 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3489 | if (ret) { | |
3490 | mlog_errno(ret); | |
3491 | goto out; | |
589dc260 | 3492 | } |
589dc260 | 3493 | |
ba937127 JB |
3494 | xs->header = bucket_xh(xs->bucket); |
3495 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3496 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3497 | ||
3498 | if (found) { | |
589dc260 TM |
3499 | xs->here = &xs->header->xh_entries[index]; |
3500 | mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, | |
ba937127 | 3501 | (unsigned long long)bucket_blkno(xs->bucket), index); |
589dc260 TM |
3502 | } else |
3503 | ret = -ENODATA; | |
3504 | ||
3505 | out: | |
e2356a3f | 3506 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3507 | return ret; |
3508 | } | |
3509 | ||
3510 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3511 | struct buffer_head *root_bh, | |
3512 | int name_index, | |
3513 | const char *name, | |
3514 | struct ocfs2_xattr_search *xs) | |
3515 | { | |
3516 | int ret; | |
3517 | struct ocfs2_xattr_block *xb = | |
3518 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3519 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3520 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3521 | u64 p_blkno = 0; | |
3522 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3523 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3524 | |
3525 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3526 | return -ENODATA; | |
3527 | ||
3528 | mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", | |
3529 | name, name_hash, name_index); | |
3530 | ||
3531 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3532 | &num_clusters, el); | |
3533 | if (ret) { | |
3534 | mlog_errno(ret); | |
3535 | goto out; | |
3536 | } | |
3537 | ||
3538 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3539 | ||
3540 | mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " | |
de29c085 MF |
3541 | "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, |
3542 | first_hash); | |
589dc260 TM |
3543 | |
3544 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3545 | p_blkno, first_hash, num_clusters, xs); | |
3546 | ||
3547 | out: | |
3548 | return ret; | |
3549 | } | |
3550 | ||
0c044f0b TM |
3551 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3552 | u64 blkno, | |
3553 | u32 clusters, | |
3554 | xattr_bucket_func *func, | |
3555 | void *para) | |
3556 | { | |
6dde41d9 | 3557 | int i, ret = 0; |
0c044f0b TM |
3558 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3559 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3560 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3561 | |
ba937127 JB |
3562 | bucket = ocfs2_xattr_bucket_new(inode); |
3563 | if (!bucket) { | |
3564 | mlog_errno(-ENOMEM); | |
3565 | return -ENOMEM; | |
3566 | } | |
0c044f0b TM |
3567 | |
3568 | mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", | |
de29c085 | 3569 | clusters, (unsigned long long)blkno); |
0c044f0b | 3570 | |
ba937127 JB |
3571 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
3572 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
3573 | if (ret) { |
3574 | mlog_errno(ret); | |
ba937127 | 3575 | break; |
0c044f0b TM |
3576 | } |
3577 | ||
0c044f0b TM |
3578 | /* |
3579 | * The real bucket num in this series of blocks is stored | |
3580 | * in the 1st bucket. | |
3581 | */ | |
3582 | if (i == 0) | |
ba937127 | 3583 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 3584 | |
de29c085 MF |
3585 | mlog(0, "iterating xattr bucket %llu, first hash %u\n", |
3586 | (unsigned long long)blkno, | |
ba937127 | 3587 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 3588 | if (func) { |
ba937127 | 3589 | ret = func(inode, bucket, para); |
a46fa684 | 3590 | if (ret && ret != -ERANGE) |
0c044f0b | 3591 | mlog_errno(ret); |
ba937127 | 3592 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
3593 | } |
3594 | ||
ba937127 JB |
3595 | ocfs2_xattr_bucket_relse(bucket); |
3596 | if (ret) | |
3597 | break; | |
0c044f0b TM |
3598 | } |
3599 | ||
ba937127 | 3600 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
3601 | return ret; |
3602 | } | |
3603 | ||
3604 | struct ocfs2_xattr_tree_list { | |
3605 | char *buffer; | |
3606 | size_t buffer_size; | |
936b8834 | 3607 | size_t result; |
0c044f0b TM |
3608 | }; |
3609 | ||
fd68a894 | 3610 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
3611 | struct ocfs2_xattr_header *xh, |
3612 | int index, | |
3613 | int *block_off, | |
3614 | int *new_offset) | |
3615 | { | |
3616 | u16 name_offset; | |
3617 | ||
3618 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
3619 | return -EINVAL; | |
3620 | ||
3621 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
3622 | ||
fd68a894 TM |
3623 | *block_off = name_offset >> sb->s_blocksize_bits; |
3624 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
3625 | |
3626 | return 0; | |
3627 | } | |
3628 | ||
3629 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
3630 | struct ocfs2_xattr_bucket *bucket, | |
3631 | void *para) | |
3632 | { | |
936b8834 | 3633 | int ret = 0, type; |
0c044f0b | 3634 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 3635 | int i, block_off, new_offset; |
936b8834 | 3636 | const char *prefix, *name; |
0c044f0b | 3637 | |
3e632946 JB |
3638 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
3639 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 TM |
3640 | type = ocfs2_xattr_get_type(entry); |
3641 | prefix = ocfs2_xattr_prefix(type); | |
0c044f0b | 3642 | |
936b8834 | 3643 | if (prefix) { |
fd68a894 | 3644 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
3e632946 | 3645 | bucket_xh(bucket), |
0c044f0b TM |
3646 | i, |
3647 | &block_off, | |
3648 | &new_offset); | |
3649 | if (ret) | |
3650 | break; | |
936b8834 | 3651 | |
51def39f | 3652 | name = (const char *)bucket_block(bucket, block_off) + |
936b8834 TM |
3653 | new_offset; |
3654 | ret = ocfs2_xattr_list_entry(xl->buffer, | |
3655 | xl->buffer_size, | |
3656 | &xl->result, | |
3657 | prefix, name, | |
3658 | entry->xe_name_len); | |
3659 | if (ret) | |
3660 | break; | |
0c044f0b TM |
3661 | } |
3662 | } | |
3663 | ||
3664 | return ret; | |
3665 | } | |
3666 | ||
47bca495 TM |
3667 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
3668 | struct buffer_head *blk_bh, | |
3669 | xattr_tree_rec_func *rec_func, | |
3670 | void *para) | |
0c044f0b | 3671 | { |
47bca495 TM |
3672 | struct ocfs2_xattr_block *xb = |
3673 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
3674 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
3675 | int ret = 0; |
3676 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
3677 | u64 p_blkno = 0; | |
0c044f0b | 3678 | |
47bca495 | 3679 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
3680 | return 0; |
3681 | ||
3682 | while (name_hash > 0) { | |
3683 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
3684 | &e_cpos, &num_clusters, el); | |
3685 | if (ret) { | |
3686 | mlog_errno(ret); | |
47bca495 | 3687 | break; |
0c044f0b TM |
3688 | } |
3689 | ||
47bca495 TM |
3690 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
3691 | num_clusters, para); | |
0c044f0b | 3692 | if (ret) { |
a46fa684 TM |
3693 | if (ret != -ERANGE) |
3694 | mlog_errno(ret); | |
47bca495 | 3695 | break; |
0c044f0b TM |
3696 | } |
3697 | ||
3698 | if (e_cpos == 0) | |
3699 | break; | |
3700 | ||
3701 | name_hash = e_cpos - 1; | |
3702 | } | |
3703 | ||
47bca495 TM |
3704 | return ret; |
3705 | ||
3706 | } | |
3707 | ||
3708 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
3709 | struct buffer_head *root_bh, | |
3710 | u64 blkno, u32 cpos, u32 len, void *para) | |
3711 | { | |
3712 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
3713 | ocfs2_list_xattr_bucket, para); | |
3714 | } | |
3715 | ||
3716 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
3717 | struct buffer_head *blk_bh, | |
3718 | char *buffer, | |
3719 | size_t buffer_size) | |
3720 | { | |
3721 | int ret; | |
3722 | struct ocfs2_xattr_tree_list xl = { | |
3723 | .buffer = buffer, | |
3724 | .buffer_size = buffer_size, | |
3725 | .result = 0, | |
3726 | }; | |
3727 | ||
3728 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
3729 | ocfs2_list_xattr_tree_rec, &xl); | |
3730 | if (ret) { | |
3731 | mlog_errno(ret); | |
3732 | goto out; | |
3733 | } | |
3734 | ||
936b8834 | 3735 | ret = xl.result; |
0c044f0b TM |
3736 | out: |
3737 | return ret; | |
3738 | } | |
01225596 TM |
3739 | |
3740 | static int cmp_xe(const void *a, const void *b) | |
3741 | { | |
3742 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3743 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
3744 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
3745 | ||
3746 | if (l_hash > r_hash) | |
3747 | return 1; | |
3748 | if (l_hash < r_hash) | |
3749 | return -1; | |
3750 | return 0; | |
3751 | } | |
3752 | ||
3753 | static void swap_xe(void *a, void *b, int size) | |
3754 | { | |
3755 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
3756 | ||
3757 | tmp = *l; | |
3758 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
3759 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
3760 | } | |
3761 | ||
3762 | /* | |
3763 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
3764 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
3765 | * The header goes at the start of the bucket, and the names+values are |
3766 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
3767 | * Note: we need to sort the entries since they are not saved in order |
3768 | * in the ocfs2_xattr_block. | |
3769 | */ | |
3770 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
3771 | struct buffer_head *xb_bh, | |
178eeac3 | 3772 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
3773 | { |
3774 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 3775 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
3776 | u16 offset, size, off_change; |
3777 | struct ocfs2_xattr_entry *xe; | |
3778 | struct ocfs2_xattr_block *xb = | |
3779 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3780 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 3781 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 3782 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
3783 | char *src = xb_bh->b_data; |
3784 | char *target = bucket_block(bucket, blks - 1); | |
01225596 TM |
3785 | |
3786 | mlog(0, "cp xattr from block %llu to bucket %llu\n", | |
3787 | (unsigned long long)xb_bh->b_blocknr, | |
178eeac3 JB |
3788 | (unsigned long long)bucket_blkno(bucket)); |
3789 | ||
3790 | for (i = 0; i < blks; i++) | |
3791 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 3792 | |
01225596 TM |
3793 | /* |
3794 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
3795 | * there is a offset change corresponding to the change of | |
3796 | * ocfs2_xattr_header's position. | |
3797 | */ | |
3798 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3799 | xe = &xb_xh->xh_entries[count - 1]; | |
3800 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
3801 | size = blocksize - offset; | |
3802 | ||
3803 | /* copy all the names and values. */ | |
01225596 TM |
3804 | memcpy(target + offset, src + offset, size); |
3805 | ||
3806 | /* Init new header now. */ | |
3807 | xh->xh_count = xb_xh->xh_count; | |
3808 | xh->xh_num_buckets = cpu_to_le16(1); | |
3809 | xh->xh_name_value_len = cpu_to_le16(size); | |
3810 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
3811 | ||
3812 | /* copy all the entries. */ | |
178eeac3 | 3813 | target = bucket_block(bucket, 0); |
01225596 TM |
3814 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
3815 | size = count * sizeof(struct ocfs2_xattr_entry); | |
3816 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
3817 | ||
3818 | /* Change the xe offset for all the xe because of the move. */ | |
3819 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
3820 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
3821 | for (i = 0; i < count; i++) | |
3822 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
3823 | ||
3824 | mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", | |
3825 | offset, size, off_change); | |
3826 | ||
3827 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
3828 | cmp_xe, swap_xe); | |
3829 | } | |
3830 | ||
3831 | /* | |
3832 | * After we move xattr from block to index btree, we have to | |
3833 | * update ocfs2_xattr_search to the new xe and base. | |
3834 | * | |
3835 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
3836 | * While if the entry is in index b-tree, "bucket" indicates the | |
3837 | * real place of the xattr. | |
3838 | */ | |
178eeac3 JB |
3839 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
3840 | struct ocfs2_xattr_search *xs, | |
3841 | struct buffer_head *old_bh) | |
01225596 | 3842 | { |
01225596 TM |
3843 | char *buf = old_bh->b_data; |
3844 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
3845 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 3846 | int i; |
01225596 | 3847 | |
ba937127 | 3848 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 3849 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
3850 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3851 | ||
178eeac3 JB |
3852 | if (xs->not_found) |
3853 | return; | |
01225596 | 3854 | |
178eeac3 JB |
3855 | i = xs->here - old_xh->xh_entries; |
3856 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
3857 | } |
3858 | ||
3859 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
3860 | struct ocfs2_xattr_search *xs, |
3861 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 3862 | { |
85db90e7 | 3863 | int ret; |
01225596 TM |
3864 | u32 bit_off, len; |
3865 | u64 blkno; | |
85db90e7 | 3866 | handle_t *handle = ctxt->handle; |
01225596 TM |
3867 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
3868 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
01225596 TM |
3869 | struct buffer_head *xb_bh = xs->xattr_bh; |
3870 | struct ocfs2_xattr_block *xb = | |
3871 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
3872 | struct ocfs2_xattr_tree_root *xr; | |
3873 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 TM |
3874 | |
3875 | mlog(0, "create xattr index block for %llu\n", | |
3876 | (unsigned long long)xb_bh->b_blocknr); | |
3877 | ||
3878 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 3879 | BUG_ON(!xs->bucket); |
01225596 | 3880 | |
01225596 TM |
3881 | /* |
3882 | * XXX: | |
3883 | * We can use this lock for now, and maybe move to a dedicated mutex | |
3884 | * if performance becomes a problem later. | |
3885 | */ | |
3886 | down_write(&oi->ip_alloc_sem); | |
3887 | ||
0cf2f763 | 3888 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 3889 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
3890 | if (ret) { |
3891 | mlog_errno(ret); | |
85db90e7 | 3892 | goto out; |
01225596 TM |
3893 | } |
3894 | ||
78f30c31 TM |
3895 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, |
3896 | 1, 1, &bit_off, &len); | |
01225596 TM |
3897 | if (ret) { |
3898 | mlog_errno(ret); | |
85db90e7 | 3899 | goto out; |
01225596 TM |
3900 | } |
3901 | ||
3902 | /* | |
3903 | * The bucket may spread in many blocks, and | |
3904 | * we will only touch the 1st block and the last block | |
3905 | * in the whole bucket(one for entry and one for data). | |
3906 | */ | |
3907 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
3908 | ||
de29c085 MF |
3909 | mlog(0, "allocate 1 cluster from %llu to xattr block\n", |
3910 | (unsigned long long)blkno); | |
01225596 | 3911 | |
178eeac3 JB |
3912 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); |
3913 | if (ret) { | |
01225596 | 3914 | mlog_errno(ret); |
85db90e7 | 3915 | goto out; |
01225596 TM |
3916 | } |
3917 | ||
178eeac3 JB |
3918 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
3919 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
3920 | if (ret) { |
3921 | mlog_errno(ret); | |
85db90e7 | 3922 | goto out; |
01225596 TM |
3923 | } |
3924 | ||
178eeac3 JB |
3925 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
3926 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 3927 | |
178eeac3 | 3928 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
3929 | |
3930 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
3931 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
3932 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
3933 | ||
3934 | xr = &xb->xb_attrs.xb_root; | |
3935 | xr->xt_clusters = cpu_to_le32(1); | |
3936 | xr->xt_last_eb_blk = 0; | |
3937 | xr->xt_list.l_tree_depth = 0; | |
3938 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
3939 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
3940 | ||
3941 | xr->xt_list.l_recs[0].e_cpos = 0; | |
3942 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
3943 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
3944 | ||
3945 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
3946 | ||
85db90e7 | 3947 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 3948 | |
85db90e7 | 3949 | out: |
01225596 TM |
3950 | up_write(&oi->ip_alloc_sem); |
3951 | ||
01225596 TM |
3952 | return ret; |
3953 | } | |
3954 | ||
3955 | static int cmp_xe_offset(const void *a, const void *b) | |
3956 | { | |
3957 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
3958 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
3959 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
3960 | ||
3961 | if (l_name_offset < r_name_offset) | |
3962 | return 1; | |
3963 | if (l_name_offset > r_name_offset) | |
3964 | return -1; | |
3965 | return 0; | |
3966 | } | |
3967 | ||
3968 | /* | |
3969 | * defrag a xattr bucket if we find that the bucket has some | |
3970 | * holes beteen name/value pairs. | |
3971 | * We will move all the name/value pairs to the end of the bucket | |
3972 | * so that we can spare some space for insertion. | |
3973 | */ | |
3974 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 3975 | handle_t *handle, |
01225596 TM |
3976 | struct ocfs2_xattr_bucket *bucket) |
3977 | { | |
3978 | int ret, i; | |
3979 | size_t end, offset, len, value_len; | |
3980 | struct ocfs2_xattr_header *xh; | |
3981 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 3982 | u64 blkno = bucket_blkno(bucket); |
01225596 | 3983 | u16 xh_free_start; |
01225596 | 3984 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 3985 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
3986 | |
3987 | /* | |
3988 | * In order to make the operation more efficient and generic, | |
3989 | * we copy all the blocks into a contiguous memory and do the | |
3990 | * defragment there, so if anything is error, we will not touch | |
3991 | * the real block. | |
3992 | */ | |
3993 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
3994 | if (!bucket_buf) { | |
3995 | ret = -EIO; | |
3996 | goto out; | |
3997 | } | |
3998 | ||
3999 | buf = bucket_buf; | |
1c32a2fd TM |
4000 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4001 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 4002 | |
1c32a2fd | 4003 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
4004 | OCFS2_JOURNAL_ACCESS_WRITE); |
4005 | if (ret < 0) { | |
4006 | mlog_errno(ret); | |
85db90e7 | 4007 | goto out; |
01225596 TM |
4008 | } |
4009 | ||
4010 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
4011 | entries = (char *)xh->xh_entries; | |
4012 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4013 | ||
4014 | mlog(0, "adjust xattr bucket in %llu, count = %u, " | |
4015 | "xh_free_start = %u, xh_name_value_len = %u.\n", | |
de29c085 MF |
4016 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
4017 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
4018 | |
4019 | /* | |
4020 | * sort all the entries by their offset. | |
4021 | * the largest will be the first, so that we can | |
4022 | * move them to the end one by one. | |
4023 | */ | |
4024 | sort(entries, le16_to_cpu(xh->xh_count), | |
4025 | sizeof(struct ocfs2_xattr_entry), | |
4026 | cmp_xe_offset, swap_xe); | |
4027 | ||
4028 | /* Move all name/values to the end of the bucket. */ | |
4029 | xe = xh->xh_entries; | |
4030 | end = OCFS2_XATTR_BUCKET_SIZE; | |
4031 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
4032 | offset = le16_to_cpu(xe->xe_name_offset); | |
4033 | if (ocfs2_xattr_is_local(xe)) | |
4034 | value_len = OCFS2_XATTR_SIZE( | |
4035 | le64_to_cpu(xe->xe_value_size)); | |
4036 | else | |
4037 | value_len = OCFS2_XATTR_ROOT_SIZE; | |
4038 | len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; | |
4039 | ||
4040 | /* | |
4041 | * We must make sure that the name/value pair | |
4042 | * exist in the same block. So adjust end to | |
4043 | * the previous block end if needed. | |
4044 | */ | |
4045 | if (((end - len) / blocksize != | |
4046 | (end - 1) / blocksize)) | |
4047 | end = end - end % blocksize; | |
4048 | ||
4049 | if (end > offset + len) { | |
4050 | memmove(bucket_buf + end - len, | |
4051 | bucket_buf + offset, len); | |
4052 | xe->xe_name_offset = cpu_to_le16(end - len); | |
4053 | } | |
4054 | ||
4055 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
4056 | "bucket %llu\n", (unsigned long long)blkno); | |
4057 | ||
4058 | end -= len; | |
4059 | } | |
4060 | ||
4061 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
4062 | "bucket %llu\n", (unsigned long long)blkno); | |
4063 | ||
4064 | if (xh_free_start == end) | |
85db90e7 | 4065 | goto out; |
01225596 TM |
4066 | |
4067 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
4068 | xh->xh_free_start = cpu_to_le16(end); | |
4069 | ||
4070 | /* sort the entries by their name_hash. */ | |
4071 | sort(entries, le16_to_cpu(xh->xh_count), | |
4072 | sizeof(struct ocfs2_xattr_entry), | |
4073 | cmp_xe, swap_xe); | |
4074 | ||
4075 | buf = bucket_buf; | |
1c32a2fd TM |
4076 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4077 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
4078 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 4079 | |
01225596 | 4080 | out: |
01225596 TM |
4081 | kfree(bucket_buf); |
4082 | return ret; | |
4083 | } | |
4084 | ||
4085 | /* | |
b5c03e74 JB |
4086 | * prev_blkno points to the start of an existing extent. new_blkno |
4087 | * points to a newly allocated extent. Because we know each of our | |
4088 | * clusters contains more than bucket, we can easily split one cluster | |
4089 | * at a bucket boundary. So we take the last cluster of the existing | |
4090 | * extent and split it down the middle. We move the last half of the | |
4091 | * buckets in the last cluster of the existing extent over to the new | |
4092 | * extent. | |
01225596 | 4093 | * |
b5c03e74 JB |
4094 | * first_bh is the buffer at prev_blkno so we can update the existing |
4095 | * extent's bucket count. header_bh is the bucket were we were hoping | |
4096 | * to insert our xattr. If the bucket move places the target in the new | |
4097 | * extent, we'll update first_bh and header_bh after modifying the old | |
4098 | * extent. | |
4099 | * | |
4100 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
4101 | */ |
4102 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
4103 | handle_t *handle, | |
41cb8148 JB |
4104 | struct ocfs2_xattr_bucket *first, |
4105 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4106 | u64 new_blkno, |
01225596 TM |
4107 | u32 num_clusters, |
4108 | u32 *first_hash) | |
4109 | { | |
c58b6032 | 4110 | int ret; |
41cb8148 JB |
4111 | struct super_block *sb = inode->i_sb; |
4112 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
4113 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 4114 | int to_move = num_buckets / 2; |
c58b6032 | 4115 | u64 src_blkno; |
41cb8148 JB |
4116 | u64 last_cluster_blkno = bucket_blkno(first) + |
4117 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 4118 | |
41cb8148 JB |
4119 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
4120 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 4121 | |
01225596 | 4122 | mlog(0, "move half of xattrs in cluster %llu to %llu\n", |
c58b6032 | 4123 | (unsigned long long)last_cluster_blkno, (unsigned long long)new_blkno); |
01225596 | 4124 | |
41cb8148 | 4125 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
4126 | last_cluster_blkno, new_blkno, |
4127 | to_move, first_hash); | |
01225596 TM |
4128 | if (ret) { |
4129 | mlog_errno(ret); | |
4130 | goto out; | |
4131 | } | |
4132 | ||
c58b6032 JB |
4133 | /* This is the first bucket that got moved */ |
4134 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 4135 | |
b5c03e74 | 4136 | /* |
c58b6032 | 4137 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 4138 | * update first and target. |
b5c03e74 | 4139 | */ |
41cb8148 | 4140 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
4141 | /* Find the block for the new target bucket */ |
4142 | src_blkno = new_blkno + | |
41cb8148 JB |
4143 | (bucket_blkno(target) - src_blkno); |
4144 | ||
4145 | ocfs2_xattr_bucket_relse(first); | |
4146 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 4147 | |
b5c03e74 | 4148 | /* |
c58b6032 | 4149 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
4150 | * journal from ocfs2_cp_xattr_bucket(). |
4151 | */ | |
41cb8148 | 4152 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
4153 | if (ret) { |
4154 | mlog_errno(ret); | |
4155 | goto out; | |
4156 | } | |
41cb8148 JB |
4157 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
4158 | if (ret) | |
b5c03e74 | 4159 | mlog_errno(ret); |
01225596 | 4160 | |
01225596 TM |
4161 | } |
4162 | ||
01225596 | 4163 | out: |
01225596 TM |
4164 | return ret; |
4165 | } | |
4166 | ||
01225596 | 4167 | /* |
80bcaf34 TM |
4168 | * Find the suitable pos when we divide a bucket into 2. |
4169 | * We have to make sure the xattrs with the same hash value exist | |
4170 | * in the same bucket. | |
4171 | * | |
4172 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
4173 | * place where the hash value changes. Try to find the most even split. | |
4174 | * The most common case is that all entries have different hash values, | |
4175 | * and the first check we make will find a place to split. | |
4176 | */ | |
4177 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
4178 | { | |
4179 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
4180 | int count = le16_to_cpu(xh->xh_count); | |
4181 | int delta, middle = count / 2; | |
4182 | ||
4183 | /* | |
4184 | * We start at the middle. Each step gets farther away in both | |
4185 | * directions. We therefore hit the change in hash value | |
4186 | * nearest to the middle. Note that this loop does not execute for | |
4187 | * count < 2. | |
4188 | */ | |
4189 | for (delta = 0; delta < middle; delta++) { | |
4190 | /* Let's check delta earlier than middle */ | |
4191 | if (cmp_xe(&entries[middle - delta - 1], | |
4192 | &entries[middle - delta])) | |
4193 | return middle - delta; | |
4194 | ||
4195 | /* For even counts, don't walk off the end */ | |
4196 | if ((middle + delta + 1) == count) | |
4197 | continue; | |
4198 | ||
4199 | /* Now try delta past middle */ | |
4200 | if (cmp_xe(&entries[middle + delta], | |
4201 | &entries[middle + delta + 1])) | |
4202 | return middle + delta + 1; | |
4203 | } | |
4204 | ||
4205 | /* Every entry had the same hash */ | |
4206 | return count; | |
4207 | } | |
4208 | ||
4209 | /* | |
4210 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4211 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4212 | * |
4213 | * Normally half of the xattrs will be moved. But we have to make | |
4214 | * sure that the xattrs with the same hash value are stored in the | |
4215 | * same bucket. If all the xattrs in this bucket have the same hash | |
4216 | * value, the new bucket will be initialized as an empty one and the | |
4217 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4218 | */ |
80bcaf34 TM |
4219 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4220 | handle_t *handle, | |
4221 | u64 blk, | |
4222 | u64 new_blk, | |
4223 | u32 *first_hash, | |
4224 | int new_bucket_head) | |
01225596 TM |
4225 | { |
4226 | int ret, i; | |
80bcaf34 | 4227 | int count, start, len, name_value_len = 0, xe_len, name_offset = 0; |
ba937127 | 4228 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4229 | struct ocfs2_xattr_header *xh; |
4230 | struct ocfs2_xattr_entry *xe; | |
4231 | int blocksize = inode->i_sb->s_blocksize; | |
4232 | ||
80bcaf34 | 4233 | mlog(0, "move some of xattrs from bucket %llu to %llu\n", |
de29c085 | 4234 | (unsigned long long)blk, (unsigned long long)new_blk); |
01225596 | 4235 | |
ba937127 JB |
4236 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4237 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4238 | if (!s_bucket || !t_bucket) { | |
4239 | ret = -ENOMEM; | |
4240 | mlog_errno(ret); | |
4241 | goto out; | |
4242 | } | |
01225596 | 4243 | |
ba937127 | 4244 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4245 | if (ret) { |
4246 | mlog_errno(ret); | |
4247 | goto out; | |
4248 | } | |
4249 | ||
ba937127 | 4250 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4251 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4252 | if (ret) { |
4253 | mlog_errno(ret); | |
4254 | goto out; | |
4255 | } | |
4256 | ||
784b816a JB |
4257 | /* |
4258 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4259 | * there's no need to read it. | |
4260 | */ | |
ba937127 | 4261 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); |
01225596 TM |
4262 | if (ret) { |
4263 | mlog_errno(ret); | |
4264 | goto out; | |
4265 | } | |
4266 | ||
2b656c1d JB |
4267 | /* |
4268 | * Hey, if we're overwriting t_bucket, what difference does | |
4269 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4270 | * same part of ocfs2_cp_xattr_bucket(). | |
4271 | */ | |
ba937127 | 4272 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4273 | new_bucket_head ? |
4274 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4275 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4276 | if (ret) { | |
4277 | mlog_errno(ret); | |
4278 | goto out; | |
01225596 TM |
4279 | } |
4280 | ||
ba937127 | 4281 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4282 | count = le16_to_cpu(xh->xh_count); |
4283 | start = ocfs2_xattr_find_divide_pos(xh); | |
4284 | ||
4285 | if (start == count) { | |
4286 | xe = &xh->xh_entries[start-1]; | |
4287 | ||
4288 | /* | |
4289 | * initialized a new empty bucket here. | |
4290 | * The hash value is set as one larger than | |
4291 | * that of the last entry in the previous bucket. | |
4292 | */ | |
ba937127 JB |
4293 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4294 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4295 | |
ba937127 | 4296 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4297 | xh->xh_free_start = cpu_to_le16(blocksize); |
4298 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4299 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4300 | ||
4301 | goto set_num_buckets; | |
4302 | } | |
4303 | ||
01225596 | 4304 | /* copy the whole bucket to the new first. */ |
ba937127 | 4305 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4306 | |
4307 | /* update the new bucket. */ | |
ba937127 | 4308 | xh = bucket_xh(t_bucket); |
01225596 TM |
4309 | |
4310 | /* | |
4311 | * Calculate the total name/value len and xh_free_start for | |
4312 | * the old bucket first. | |
4313 | */ | |
4314 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4315 | name_value_len = 0; | |
4316 | for (i = 0; i < start; i++) { | |
4317 | xe = &xh->xh_entries[i]; | |
4318 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4319 | if (ocfs2_xattr_is_local(xe)) | |
4320 | xe_len += | |
4321 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4322 | else | |
4323 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4324 | name_value_len += xe_len; | |
4325 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) | |
4326 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4327 | } | |
4328 | ||
4329 | /* | |
4330 | * Now begin the modification to the new bucket. | |
4331 | * | |
4332 | * In the new bucket, We just move the xattr entry to the beginning | |
4333 | * and don't touch the name/value. So there will be some holes in the | |
4334 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4335 | * called. | |
4336 | */ | |
4337 | xe = &xh->xh_entries[start]; | |
4338 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
4339 | mlog(0, "mv xattr entry len %d from %d to %d\n", len, | |
ff1ec20e MF |
4340 | (int)((char *)xe - (char *)xh), |
4341 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4342 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4343 | xe = &xh->xh_entries[count - start]; | |
4344 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4345 | memset((char *)xe, 0, len); | |
4346 | ||
4347 | le16_add_cpu(&xh->xh_count, -start); | |
4348 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4349 | ||
4350 | /* Calculate xh_free_start for the new bucket. */ | |
4351 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4352 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4353 | xe = &xh->xh_entries[i]; | |
4354 | xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
4355 | if (ocfs2_xattr_is_local(xe)) | |
4356 | xe_len += | |
4357 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
4358 | else | |
4359 | xe_len += OCFS2_XATTR_ROOT_SIZE; | |
4360 | if (le16_to_cpu(xe->xe_name_offset) < | |
4361 | le16_to_cpu(xh->xh_free_start)) | |
4362 | xh->xh_free_start = xe->xe_name_offset; | |
4363 | } | |
4364 | ||
80bcaf34 | 4365 | set_num_buckets: |
01225596 TM |
4366 | /* set xh->xh_num_buckets for the new xh. */ |
4367 | if (new_bucket_head) | |
4368 | xh->xh_num_buckets = cpu_to_le16(1); | |
4369 | else | |
4370 | xh->xh_num_buckets = 0; | |
4371 | ||
ba937127 | 4372 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4373 | |
4374 | /* store the first_hash of the new bucket. */ | |
4375 | if (first_hash) | |
4376 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4377 | ||
4378 | /* | |
80bcaf34 TM |
4379 | * Now only update the 1st block of the old bucket. If we |
4380 | * just added a new empty bucket, there is no need to modify | |
4381 | * it. | |
01225596 | 4382 | */ |
80bcaf34 TM |
4383 | if (start == count) |
4384 | goto out; | |
4385 | ||
ba937127 | 4386 | xh = bucket_xh(s_bucket); |
01225596 TM |
4387 | memset(&xh->xh_entries[start], 0, |
4388 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4389 | xh->xh_count = cpu_to_le16(start); | |
4390 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4391 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4392 | ||
ba937127 | 4393 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4394 | |
4395 | out: | |
ba937127 JB |
4396 | ocfs2_xattr_bucket_free(s_bucket); |
4397 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4398 | |
4399 | return ret; | |
4400 | } | |
4401 | ||
4402 | /* | |
4403 | * Copy xattr from one bucket to another bucket. | |
4404 | * | |
4405 | * The caller must make sure that the journal transaction | |
4406 | * has enough space for journaling. | |
4407 | */ | |
4408 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4409 | handle_t *handle, | |
4410 | u64 s_blkno, | |
4411 | u64 t_blkno, | |
4412 | int t_is_new) | |
4413 | { | |
4980c6da | 4414 | int ret; |
ba937127 | 4415 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4416 | |
4417 | BUG_ON(s_blkno == t_blkno); | |
4418 | ||
4419 | mlog(0, "cp bucket %llu to %llu, target is %d\n", | |
de29c085 MF |
4420 | (unsigned long long)s_blkno, (unsigned long long)t_blkno, |
4421 | t_is_new); | |
01225596 | 4422 | |
ba937127 JB |
4423 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4424 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4425 | if (!s_bucket || !t_bucket) { | |
4426 | ret = -ENOMEM; | |
4427 | mlog_errno(ret); | |
4428 | goto out; | |
4429 | } | |
92de109a | 4430 | |
ba937127 | 4431 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4432 | if (ret) |
4433 | goto out; | |
4434 | ||
784b816a JB |
4435 | /* |
4436 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4437 | * there's no need to read it. | |
4438 | */ | |
ba937127 | 4439 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); |
01225596 TM |
4440 | if (ret) |
4441 | goto out; | |
4442 | ||
2b656c1d JB |
4443 | /* |
4444 | * Hey, if we're overwriting t_bucket, what difference does | |
4445 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4446 | * cluster to fill, we came here from |
4447 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4448 | * ACCESS_CREATE is required. But we also might have moved data | |
4449 | * out of t_bucket before extending back into it. | |
4450 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4451 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4452 | * and copied out the end of the old extent. Then it re-extends |
4453 | * the old extent back to create space for new xattrs. That's | |
4454 | * how we get here, and the bucket isn't really new. | |
4455 | */ | |
ba937127 | 4456 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4457 | t_is_new ? |
4458 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4459 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4460 | if (ret) | |
4461 | goto out; | |
01225596 | 4462 | |
ba937127 JB |
4463 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4464 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4465 | |
4466 | out: | |
ba937127 JB |
4467 | ocfs2_xattr_bucket_free(t_bucket); |
4468 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4469 | |
4470 | return ret; | |
4471 | } | |
4472 | ||
4473 | /* | |
874d65af JB |
4474 | * src_blk points to the start of an existing extent. last_blk points to |
4475 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4476 | * extent. We copy the buckets from the cluster at last_blk to the new |
4477 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4478 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4479 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4480 | * by the same amount. | |
01225596 | 4481 | */ |
54ecb6b6 JB |
4482 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4483 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4484 | unsigned int start_bucket, | |
4485 | u32 *first_hash) | |
01225596 TM |
4486 | { |
4487 | int i, ret, credits; | |
4488 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4489 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4490 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4491 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4492 | |
874d65af JB |
4493 | mlog(0, "mv xattrs from cluster %llu to %llu\n", |
4494 | (unsigned long long)last_blk, (unsigned long long)to_blk); | |
01225596 | 4495 | |
54ecb6b6 JB |
4496 | BUG_ON(start_bucket >= num_buckets); |
4497 | if (start_bucket) { | |
4498 | num_buckets -= start_bucket; | |
4499 | last_blk += (start_bucket * blks_per_bucket); | |
4500 | } | |
4501 | ||
15d60929 JB |
4502 | /* The first bucket of the original extent */ |
4503 | old_first = ocfs2_xattr_bucket_new(inode); | |
4504 | /* The first bucket of the new extent */ | |
4505 | new_first = ocfs2_xattr_bucket_new(inode); | |
4506 | if (!old_first || !new_first) { | |
4507 | ret = -ENOMEM; | |
4508 | mlog_errno(ret); | |
4509 | goto out; | |
4510 | } | |
4511 | ||
874d65af | 4512 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4513 | if (ret) { |
4514 | mlog_errno(ret); | |
4515 | goto out; | |
4516 | } | |
4517 | ||
01225596 | 4518 | /* |
54ecb6b6 JB |
4519 | * We need to update the first bucket of the old extent and all |
4520 | * the buckets going to the new extent. | |
01225596 | 4521 | */ |
54ecb6b6 JB |
4522 | credits = ((num_buckets + 1) * blks_per_bucket) + |
4523 | handle->h_buffer_credits; | |
01225596 TM |
4524 | ret = ocfs2_extend_trans(handle, credits); |
4525 | if (ret) { | |
4526 | mlog_errno(ret); | |
4527 | goto out; | |
4528 | } | |
4529 | ||
15d60929 JB |
4530 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4531 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4532 | if (ret) { |
4533 | mlog_errno(ret); | |
4534 | goto out; | |
4535 | } | |
4536 | ||
4537 | for (i = 0; i < num_buckets; i++) { | |
4538 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4539 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4540 | to_blk + (i * blks_per_bucket), |
4541 | 1); | |
01225596 TM |
4542 | if (ret) { |
4543 | mlog_errno(ret); | |
4544 | goto out; | |
4545 | } | |
01225596 TM |
4546 | } |
4547 | ||
15d60929 JB |
4548 | /* |
4549 | * Get the new bucket ready before we dirty anything | |
4550 | * (This actually shouldn't fail, because we already dirtied | |
4551 | * it once in ocfs2_cp_xattr_bucket()). | |
4552 | */ | |
4553 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4554 | if (ret) { | |
01225596 TM |
4555 | mlog_errno(ret); |
4556 | goto out; | |
4557 | } | |
15d60929 JB |
4558 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4559 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4560 | if (ret) { |
4561 | mlog_errno(ret); | |
4562 | goto out; | |
4563 | } | |
4564 | ||
15d60929 JB |
4565 | /* Now update the headers */ |
4566 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4567 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4568 | |
15d60929 JB |
4569 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4570 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4571 | |
4572 | if (first_hash) | |
15d60929 JB |
4573 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4574 | ||
01225596 | 4575 | out: |
15d60929 JB |
4576 | ocfs2_xattr_bucket_free(new_first); |
4577 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4578 | return ret; |
4579 | } | |
4580 | ||
4581 | /* | |
80bcaf34 | 4582 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4583 | * This function should only be called when bucket size == cluster size. |
4584 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4585 | */ | |
80bcaf34 TM |
4586 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4587 | handle_t *handle, | |
4588 | u64 prev_blk, | |
4589 | u64 new_blk, | |
4590 | u32 *first_hash) | |
01225596 TM |
4591 | { |
4592 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
85db90e7 | 4593 | int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; |
01225596 TM |
4594 | |
4595 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
4596 | ||
4597 | ret = ocfs2_extend_trans(handle, credits); | |
4598 | if (ret) { | |
4599 | mlog_errno(ret); | |
4600 | return ret; | |
4601 | } | |
4602 | ||
4603 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
4604 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
4605 | new_blk, first_hash, 1); | |
01225596 TM |
4606 | } |
4607 | ||
4608 | /* | |
4609 | * Move some xattrs from the old cluster to the new one since they are not | |
4610 | * contiguous in ocfs2 xattr tree. | |
4611 | * | |
4612 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
4613 | * prev_blk to it. v_start will be set as the first name hash value in this | |
4614 | * new cluster so that it can be used as e_cpos during tree insertion and | |
4615 | * don't collide with our original b-tree operations. first_bh and header_bh | |
4616 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
4617 | * to extend the insert bucket. | |
4618 | * | |
4619 | * The problem is how much xattr should we move to the new one and when should | |
4620 | * we update first_bh and header_bh? | |
4621 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
4622 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
4623 | * update the first_bh and header_bh if the insert bucket has been moved | |
4624 | * to the new cluster. | |
4625 | * 2. If cluster_size == bucket_size: | |
4626 | * a) If the previous extent rec has more than one cluster and the insert | |
4627 | * place isn't in the last cluster, copy the entire last cluster to the | |
4628 | * new one. This time, we don't need to upate the first_bh and header_bh | |
4629 | * since they will not be moved into the new cluster. | |
4630 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
4631 | * the new one. And we set the extend flag to zero if the insert place is | |
4632 | * moved into the new allocated cluster since no extend is needed. | |
4633 | */ | |
4634 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
4635 | handle_t *handle, | |
012ee910 JB |
4636 | struct ocfs2_xattr_bucket *first, |
4637 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4638 | u64 new_blk, |
01225596 TM |
4639 | u32 prev_clusters, |
4640 | u32 *v_start, | |
4641 | int *extend) | |
4642 | { | |
92cf3adf | 4643 | int ret; |
01225596 TM |
4644 | |
4645 | mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", | |
012ee910 | 4646 | (unsigned long long)bucket_blkno(first), prev_clusters, |
de29c085 | 4647 | (unsigned long long)new_blk); |
01225596 | 4648 | |
41cb8148 | 4649 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
4650 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
4651 | handle, | |
41cb8148 | 4652 | first, target, |
01225596 | 4653 | new_blk, |
01225596 TM |
4654 | prev_clusters, |
4655 | v_start); | |
012ee910 | 4656 | if (ret) |
41cb8148 | 4657 | mlog_errno(ret); |
41cb8148 | 4658 | } else { |
92cf3adf JB |
4659 | /* The start of the last cluster in the first extent */ |
4660 | u64 last_blk = bucket_blkno(first) + | |
4661 | ((prev_clusters - 1) * | |
4662 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 4663 | |
012ee910 | 4664 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 4665 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 4666 | bucket_blkno(first), |
54ecb6b6 | 4667 | last_blk, new_blk, 0, |
01225596 | 4668 | v_start); |
012ee910 JB |
4669 | if (ret) |
4670 | mlog_errno(ret); | |
4671 | } else { | |
80bcaf34 TM |
4672 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
4673 | last_blk, new_blk, | |
4674 | v_start); | |
012ee910 JB |
4675 | if (ret) |
4676 | mlog_errno(ret); | |
01225596 | 4677 | |
92cf3adf | 4678 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
4679 | *extend = 0; |
4680 | } | |
4681 | } | |
4682 | ||
4683 | return ret; | |
4684 | } | |
4685 | ||
4686 | /* | |
4687 | * Add a new cluster for xattr storage. | |
4688 | * | |
4689 | * If the new cluster is contiguous with the previous one, it will be | |
4690 | * appended to the same extent record, and num_clusters will be updated. | |
4691 | * If not, we will insert a new extent for it and move some xattrs in | |
4692 | * the last cluster into the new allocated one. | |
4693 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
4694 | * lose the benefits of hashing because we'll have to search large leaves. | |
4695 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
4696 | * if it's bigger). | |
4697 | * | |
4698 | * first_bh is the first block of the previous extent rec and header_bh | |
4699 | * indicates the bucket we will insert the new xattrs. They will be updated | |
4700 | * when the header_bh is moved into the new cluster. | |
4701 | */ | |
4702 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
4703 | struct buffer_head *root_bh, | |
ed29c0ca JB |
4704 | struct ocfs2_xattr_bucket *first, |
4705 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
4706 | u32 *num_clusters, |
4707 | u32 prev_cpos, | |
78f30c31 TM |
4708 | int *extend, |
4709 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4710 | { |
85db90e7 | 4711 | int ret; |
01225596 TM |
4712 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
4713 | u32 prev_clusters = *num_clusters; | |
4714 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
4715 | u64 block; | |
85db90e7 | 4716 | handle_t *handle = ctxt->handle; |
01225596 | 4717 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 4718 | struct ocfs2_extent_tree et; |
01225596 TM |
4719 | |
4720 | mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " | |
4721 | "previous xattr blkno = %llu\n", | |
4722 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
ed29c0ca | 4723 | prev_cpos, (unsigned long long)bucket_blkno(first)); |
01225596 | 4724 | |
5e404e9e | 4725 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 4726 | |
0cf2f763 | 4727 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 4728 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4729 | if (ret < 0) { |
4730 | mlog_errno(ret); | |
4731 | goto leave; | |
4732 | } | |
4733 | ||
78f30c31 | 4734 | ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, |
01225596 TM |
4735 | clusters_to_add, &bit_off, &num_bits); |
4736 | if (ret < 0) { | |
4737 | if (ret != -ENOSPC) | |
4738 | mlog_errno(ret); | |
4739 | goto leave; | |
4740 | } | |
4741 | ||
4742 | BUG_ON(num_bits > clusters_to_add); | |
4743 | ||
4744 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
4745 | mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", | |
4746 | num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
4747 | ||
ed29c0ca | 4748 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
4749 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
4750 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
4751 | /* | |
4752 | * If this cluster is contiguous with the old one and | |
4753 | * adding this new cluster, we don't surpass the limit of | |
4754 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
4755 | * initialized and used like other buckets in the previous | |
4756 | * cluster. | |
4757 | * So add it as a contiguous one. The caller will handle | |
4758 | * its init process. | |
4759 | */ | |
4760 | v_start = prev_cpos + prev_clusters; | |
4761 | *num_clusters = prev_clusters + num_bits; | |
4762 | mlog(0, "Add contiguous %u clusters to previous extent rec.\n", | |
4763 | num_bits); | |
4764 | } else { | |
4765 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
4766 | handle, | |
012ee910 JB |
4767 | first, |
4768 | target, | |
01225596 | 4769 | block, |
01225596 TM |
4770 | prev_clusters, |
4771 | &v_start, | |
4772 | extend); | |
4773 | if (ret) { | |
4774 | mlog_errno(ret); | |
4775 | goto leave; | |
4776 | } | |
4777 | } | |
4778 | ||
4779 | mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", | |
de29c085 | 4780 | num_bits, (unsigned long long)block, v_start); |
cc79d8c1 | 4781 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 4782 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
4783 | if (ret < 0) { |
4784 | mlog_errno(ret); | |
4785 | goto leave; | |
4786 | } | |
4787 | ||
4788 | ret = ocfs2_journal_dirty(handle, root_bh); | |
85db90e7 | 4789 | if (ret < 0) |
01225596 | 4790 | mlog_errno(ret); |
01225596 TM |
4791 | |
4792 | leave: | |
01225596 TM |
4793 | return ret; |
4794 | } | |
4795 | ||
4796 | /* | |
92de109a JB |
4797 | * We are given an extent. 'first' is the bucket at the very front of |
4798 | * the extent. The extent has space for an additional bucket past | |
4799 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
4800 | * of the target bucket. We wish to shift every bucket past the target | |
4801 | * down one, filling in that additional space. When we get back to the | |
4802 | * target, we split the target between itself and the now-empty bucket | |
4803 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
4804 | */ |
4805 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 4806 | handle_t *handle, |
92de109a JB |
4807 | struct ocfs2_xattr_bucket *first, |
4808 | u64 target_blk, | |
01225596 TM |
4809 | u32 num_clusters) |
4810 | { | |
4811 | int ret, credits; | |
4812 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
4813 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
4814 | u64 end_blk; |
4815 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 TM |
4816 | |
4817 | mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " | |
92de109a JB |
4818 | "from %llu, len = %u\n", (unsigned long long)target_blk, |
4819 | (unsigned long long)bucket_blkno(first), num_clusters); | |
01225596 | 4820 | |
92de109a JB |
4821 | /* The extent must have room for an additional bucket */ |
4822 | BUG_ON(new_bucket >= | |
4823 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 4824 | |
92de109a JB |
4825 | /* end_blk points to the last existing bucket */ |
4826 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
4827 | |
4828 | /* | |
92de109a JB |
4829 | * end_blk is the start of the last existing bucket. |
4830 | * Thus, (end_blk - target_blk) covers the target bucket and | |
4831 | * every bucket after it up to, but not including, the last | |
4832 | * existing bucket. Then we add the last existing bucket, the | |
4833 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 4834 | */ |
92de109a | 4835 | credits = (end_blk - target_blk) + (3 * blk_per_bucket) + |
85db90e7 TM |
4836 | handle->h_buffer_credits; |
4837 | ret = ocfs2_extend_trans(handle, credits); | |
4838 | if (ret) { | |
01225596 TM |
4839 | mlog_errno(ret); |
4840 | goto out; | |
4841 | } | |
4842 | ||
92de109a JB |
4843 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
4844 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4845 | if (ret) { |
4846 | mlog_errno(ret); | |
85db90e7 | 4847 | goto out; |
01225596 TM |
4848 | } |
4849 | ||
92de109a | 4850 | while (end_blk != target_blk) { |
01225596 TM |
4851 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
4852 | end_blk + blk_per_bucket, 0); | |
4853 | if (ret) | |
85db90e7 | 4854 | goto out; |
01225596 TM |
4855 | end_blk -= blk_per_bucket; |
4856 | } | |
4857 | ||
92de109a JB |
4858 | /* Move half of the xattr in target_blkno to the next bucket. */ |
4859 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
4860 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 4861 | |
92de109a JB |
4862 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
4863 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 4864 | |
01225596 TM |
4865 | out: |
4866 | return ret; | |
4867 | } | |
4868 | ||
4869 | /* | |
91f2033f JB |
4870 | * Add new xattr bucket in an extent record and adjust the buckets |
4871 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
4872 | * bucket we want to insert into. | |
01225596 | 4873 | * |
91f2033f JB |
4874 | * In the easy case, we will move all the buckets after target down by |
4875 | * one. Half of target's xattrs will be moved to the next bucket. | |
4876 | * | |
4877 | * If current cluster is full, we'll allocate a new one. This may not | |
4878 | * be contiguous. The underlying calls will make sure that there is | |
4879 | * space for the insert, shifting buckets around if necessary. | |
4880 | * 'target' may be moved by those calls. | |
01225596 TM |
4881 | */ |
4882 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
4883 | struct buffer_head *xb_bh, | |
91f2033f | 4884 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 4885 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 4886 | { |
01225596 TM |
4887 | struct ocfs2_xattr_block *xb = |
4888 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4889 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
4890 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
4891 | u32 name_hash = |
4892 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 4893 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
4894 | int ret, num_buckets, extend = 1; |
4895 | u64 p_blkno; | |
4896 | u32 e_cpos, num_clusters; | |
92de109a | 4897 | /* The bucket at the front of the extent */ |
91f2033f | 4898 | struct ocfs2_xattr_bucket *first; |
01225596 | 4899 | |
91f2033f JB |
4900 | mlog(0, "Add new xattr bucket starting from %llu\n", |
4901 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 4902 | |
ed29c0ca | 4903 | /* The first bucket of the original extent */ |
92de109a | 4904 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 4905 | if (!first) { |
92de109a JB |
4906 | ret = -ENOMEM; |
4907 | mlog_errno(ret); | |
4908 | goto out; | |
4909 | } | |
4910 | ||
01225596 TM |
4911 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
4912 | &num_clusters, el); | |
4913 | if (ret) { | |
4914 | mlog_errno(ret); | |
4915 | goto out; | |
4916 | } | |
4917 | ||
ed29c0ca | 4918 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
4919 | if (ret) { |
4920 | mlog_errno(ret); | |
4921 | goto out; | |
4922 | } | |
4923 | ||
ed29c0ca JB |
4924 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
4925 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
4926 | /* | |
4927 | * This can move first+target if the target bucket moves | |
4928 | * to the new extent. | |
4929 | */ | |
01225596 TM |
4930 | ret = ocfs2_add_new_xattr_cluster(inode, |
4931 | xb_bh, | |
ed29c0ca JB |
4932 | first, |
4933 | target, | |
01225596 TM |
4934 | &num_clusters, |
4935 | e_cpos, | |
78f30c31 TM |
4936 | &extend, |
4937 | ctxt); | |
01225596 TM |
4938 | if (ret) { |
4939 | mlog_errno(ret); | |
4940 | goto out; | |
4941 | } | |
4942 | } | |
4943 | ||
92de109a | 4944 | if (extend) { |
01225596 | 4945 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 4946 | ctxt->handle, |
ed29c0ca JB |
4947 | first, |
4948 | bucket_blkno(target), | |
01225596 | 4949 | num_clusters); |
92de109a JB |
4950 | if (ret) |
4951 | mlog_errno(ret); | |
4952 | } | |
4953 | ||
01225596 | 4954 | out: |
92de109a | 4955 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 4956 | |
01225596 TM |
4957 | return ret; |
4958 | } | |
4959 | ||
4960 | static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, | |
4961 | struct ocfs2_xattr_bucket *bucket, | |
4962 | int offs) | |
4963 | { | |
4964 | int block_off = offs >> inode->i_sb->s_blocksize_bits; | |
4965 | ||
4966 | offs = offs % inode->i_sb->s_blocksize; | |
51def39f | 4967 | return bucket_block(bucket, block_off) + offs; |
01225596 TM |
4968 | } |
4969 | ||
4970 | /* | |
4971 | * Handle the normal xattr set, including replace, delete and new. | |
01225596 TM |
4972 | * |
4973 | * Note: "local" indicates the real data's locality. So we can't | |
4974 | * just its bucket locality by its length. | |
4975 | */ | |
4976 | static void ocfs2_xattr_set_entry_normal(struct inode *inode, | |
4977 | struct ocfs2_xattr_info *xi, | |
4978 | struct ocfs2_xattr_search *xs, | |
4979 | u32 name_hash, | |
5a095611 | 4980 | int local) |
01225596 TM |
4981 | { |
4982 | struct ocfs2_xattr_entry *last, *xe; | |
6b240ff6 | 4983 | int name_len = strlen(xi->xi_name); |
01225596 TM |
4984 | struct ocfs2_xattr_header *xh = xs->header; |
4985 | u16 count = le16_to_cpu(xh->xh_count), start; | |
4986 | size_t blocksize = inode->i_sb->s_blocksize; | |
4987 | char *val; | |
4988 | size_t offs, size, new_size; | |
11179f2c | 4989 | struct ocfs2_xa_loc loc; |
01225596 | 4990 | |
11179f2c JB |
4991 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
4992 | xs->not_found ? NULL : xs->here); | |
01225596 TM |
4993 | last = &xh->xh_entries[count]; |
4994 | if (!xs->not_found) { | |
4995 | xe = xs->here; | |
4996 | offs = le16_to_cpu(xe->xe_name_offset); | |
4997 | if (ocfs2_xattr_is_local(xe)) | |
4998 | size = OCFS2_XATTR_SIZE(name_len) + | |
4999 | OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5000 | else | |
5001 | size = OCFS2_XATTR_SIZE(name_len) + | |
5002 | OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5003 | ||
5004 | /* | |
6b240ff6 JB |
5005 | * If the new value will be stored outside, xi->xi_value has |
5006 | * been initalized as an empty ocfs2_xattr_value_root, and | |
5007 | * the same goes with xi->xi_value_len, so we can set | |
5008 | * new_size safely here. | |
01225596 TM |
5009 | * See ocfs2_xattr_set_in_bucket. |
5010 | */ | |
5011 | new_size = OCFS2_XATTR_SIZE(name_len) + | |
6b240ff6 | 5012 | OCFS2_XATTR_SIZE(xi->xi_value_len); |
01225596 | 5013 | |
6b240ff6 | 5014 | if (xi->xi_value) { |
bde1e540 | 5015 | ocfs2_xa_wipe_namevalue(&loc); |
01225596 TM |
5016 | if (new_size > size) |
5017 | goto set_new_name_value; | |
5018 | ||
5019 | /* Now replace the old value with new one. */ | |
5020 | if (local) | |
6b240ff6 JB |
5021 | xe->xe_value_size = |
5022 | cpu_to_le64(xi->xi_value_len); | |
01225596 TM |
5023 | else |
5024 | xe->xe_value_size = 0; | |
5025 | ||
5026 | val = ocfs2_xattr_bucket_get_val(inode, | |
ba937127 | 5027 | xs->bucket, offs); |
01225596 TM |
5028 | memset(val + OCFS2_XATTR_SIZE(name_len), 0, |
5029 | size - OCFS2_XATTR_SIZE(name_len)); | |
6b240ff6 | 5030 | if (OCFS2_XATTR_SIZE(xi->xi_value_len) > 0) |
01225596 | 5031 | memcpy(val + OCFS2_XATTR_SIZE(name_len), |
6b240ff6 | 5032 | xi->xi_value, xi->xi_value_len); |
01225596 TM |
5033 | |
5034 | le16_add_cpu(&xh->xh_name_value_len, new_size); | |
5035 | ocfs2_xattr_set_local(xe, local); | |
5036 | return; | |
5037 | } else { | |
bde1e540 JB |
5038 | ocfs2_xa_remove_entry(&loc); |
5039 | if (!xh->xh_count) | |
5a095611 TM |
5040 | xh->xh_free_start = |
5041 | cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
5042 | ||
01225596 TM |
5043 | return; |
5044 | } | |
5045 | } else { | |
5046 | /* find a new entry for insert. */ | |
5047 | int low = 0, high = count - 1, tmp; | |
5048 | struct ocfs2_xattr_entry *tmp_xe; | |
5049 | ||
5a095611 | 5050 | while (low <= high && count) { |
01225596 TM |
5051 | tmp = (low + high) / 2; |
5052 | tmp_xe = &xh->xh_entries[tmp]; | |
5053 | ||
5054 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
5055 | low = tmp + 1; | |
5056 | else if (name_hash < | |
5057 | le32_to_cpu(tmp_xe->xe_name_hash)) | |
5058 | high = tmp - 1; | |
06b240d8 TM |
5059 | else { |
5060 | low = tmp; | |
01225596 | 5061 | break; |
06b240d8 | 5062 | } |
01225596 TM |
5063 | } |
5064 | ||
5065 | xe = &xh->xh_entries[low]; | |
5066 | if (low != count) | |
5067 | memmove(xe + 1, xe, (void *)last - (void *)xe); | |
5068 | ||
5069 | le16_add_cpu(&xh->xh_count, 1); | |
5070 | memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); | |
5071 | xe->xe_name_hash = cpu_to_le32(name_hash); | |
5072 | xe->xe_name_len = name_len; | |
6b240ff6 | 5073 | ocfs2_xattr_set_type(xe, xi->xi_name_index); |
01225596 TM |
5074 | } |
5075 | ||
5076 | set_new_name_value: | |
5077 | /* Insert the new name+value. */ | |
6b240ff6 | 5078 | size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->xi_value_len); |
01225596 TM |
5079 | |
5080 | /* | |
5081 | * We must make sure that the name/value pair | |
5082 | * exists in the same block. | |
5083 | */ | |
5084 | offs = le16_to_cpu(xh->xh_free_start); | |
5085 | start = offs - size; | |
5086 | ||
5087 | if (start >> inode->i_sb->s_blocksize_bits != | |
5088 | (offs - 1) >> inode->i_sb->s_blocksize_bits) { | |
5089 | offs = offs - offs % blocksize; | |
5090 | xh->xh_free_start = cpu_to_le16(offs); | |
5091 | } | |
5092 | ||
ba937127 | 5093 | val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); |
01225596 TM |
5094 | xe->xe_name_offset = cpu_to_le16(offs - size); |
5095 | ||
5096 | memset(val, 0, size); | |
6b240ff6 JB |
5097 | memcpy(val, xi->xi_name, name_len); |
5098 | memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->xi_value, | |
5099 | xi->xi_value_len); | |
01225596 | 5100 | |
6b240ff6 | 5101 | xe->xe_value_size = cpu_to_le64(xi->xi_value_len); |
01225596 TM |
5102 | ocfs2_xattr_set_local(xe, local); |
5103 | xs->here = xe; | |
5104 | le16_add_cpu(&xh->xh_free_start, -size); | |
5105 | le16_add_cpu(&xh->xh_name_value_len, size); | |
5106 | ||
5107 | return; | |
5108 | } | |
5109 | ||
01225596 TM |
5110 | /* |
5111 | * Set the xattr entry in the specified bucket. | |
5112 | * The bucket is indicated by xs->bucket and it should have the enough | |
5113 | * space for the xattr insertion. | |
5114 | */ | |
5115 | static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, | |
85db90e7 | 5116 | handle_t *handle, |
01225596 TM |
5117 | struct ocfs2_xattr_info *xi, |
5118 | struct ocfs2_xattr_search *xs, | |
5119 | u32 name_hash, | |
5a095611 | 5120 | int local) |
01225596 | 5121 | { |
1224be02 | 5122 | int ret; |
02dbf38d | 5123 | u64 blkno; |
01225596 | 5124 | |
ff1ec20e | 5125 | mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
6b240ff6 | 5126 | (unsigned long)xi->xi_value_len, xi->xi_name_index, |
ba937127 | 5127 | (unsigned long long)bucket_blkno(xs->bucket)); |
01225596 | 5128 | |
ba937127 | 5129 | if (!xs->bucket->bu_bhs[1]) { |
02dbf38d JB |
5130 | blkno = bucket_blkno(xs->bucket); |
5131 | ocfs2_xattr_bucket_relse(xs->bucket); | |
5132 | ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); | |
01225596 TM |
5133 | if (ret) { |
5134 | mlog_errno(ret); | |
5135 | goto out; | |
5136 | } | |
5137 | } | |
5138 | ||
ba937127 | 5139 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 JB |
5140 | OCFS2_JOURNAL_ACCESS_WRITE); |
5141 | if (ret < 0) { | |
5142 | mlog_errno(ret); | |
5143 | goto out; | |
01225596 TM |
5144 | } |
5145 | ||
5a095611 | 5146 | ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
ba937127 | 5147 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 | 5148 | |
01225596 | 5149 | out: |
01225596 TM |
5150 | return ret; |
5151 | } | |
5152 | ||
01225596 TM |
5153 | /* |
5154 | * Truncate the specified xe_off entry in xattr bucket. | |
5155 | * bucket is indicated by header_bh and len is the new length. | |
5156 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
5157 | * | |
5158 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
5159 | */ | |
5160 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 5161 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 5162 | int xe_off, |
78f30c31 TM |
5163 | int len, |
5164 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5165 | { |
5166 | int ret, offset; | |
5167 | u64 value_blk; | |
01225596 | 5168 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 5169 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 5170 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
5171 | struct ocfs2_xattr_value_buf vb = { |
5172 | .vb_access = ocfs2_journal_access, | |
5173 | }; | |
01225596 TM |
5174 | |
5175 | xe = &xh->xh_entries[xe_off]; | |
5176 | ||
5177 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
5178 | ||
5179 | offset = le16_to_cpu(xe->xe_name_offset) + | |
5180 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5181 | ||
5182 | value_blk = offset / blocksize; | |
5183 | ||
5184 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
5185 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 5186 | |
b3e5d379 JB |
5187 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
5188 | BUG_ON(!vb.vb_bh); | |
01225596 | 5189 | |
b3e5d379 JB |
5190 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
5191 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 5192 | |
548b0f22 JB |
5193 | /* |
5194 | * From here on out we have to dirty the bucket. The generic | |
5195 | * value calls only modify one of the bucket's bhs, but we need | |
5196 | * to send the bucket at once. So if they error, they *could* have | |
5197 | * modified something. We have to assume they did, and dirty | |
5198 | * the whole bucket. This leaves us in a consistent state. | |
5199 | */ | |
5200 | mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", | |
5201 | xe_off, (unsigned long long)bucket_blkno(bucket), len); | |
b3e5d379 | 5202 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
5203 | if (ret) { |
5204 | mlog_errno(ret); | |
554e7f9e TM |
5205 | goto out; |
5206 | } | |
5207 | ||
5208 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5209 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5210 | if (ret) { | |
5211 | mlog_errno(ret); | |
5212 | goto out; | |
01225596 TM |
5213 | } |
5214 | ||
548b0f22 JB |
5215 | xe->xe_value_size = cpu_to_le64(len); |
5216 | ||
548b0f22 JB |
5217 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5218 | ||
01225596 | 5219 | out: |
01225596 TM |
5220 | return ret; |
5221 | } | |
5222 | ||
5223 | static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, | |
78f30c31 TM |
5224 | struct ocfs2_xattr_search *xs, |
5225 | int len, | |
5226 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5227 | { |
5228 | int ret, offset; | |
5229 | struct ocfs2_xattr_entry *xe = xs->here; | |
5230 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; | |
5231 | ||
ba937127 | 5232 | BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
01225596 TM |
5233 | |
5234 | offset = xe - xh->xh_entries; | |
548b0f22 | 5235 | ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, |
78f30c31 | 5236 | offset, len, ctxt); |
01225596 TM |
5237 | if (ret) |
5238 | mlog_errno(ret); | |
5239 | ||
5240 | return ret; | |
5241 | } | |
5242 | ||
5243 | static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, | |
85db90e7 | 5244 | handle_t *handle, |
01225596 TM |
5245 | struct ocfs2_xattr_search *xs, |
5246 | char *val, | |
5247 | int value_len) | |
5248 | { | |
712e53e4 | 5249 | int ret, offset, block_off; |
01225596 TM |
5250 | struct ocfs2_xattr_value_root *xv; |
5251 | struct ocfs2_xattr_entry *xe = xs->here; | |
712e53e4 TM |
5252 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
5253 | void *base; | |
492a8a33 TM |
5254 | struct ocfs2_xattr_value_buf vb = { |
5255 | .vb_access = ocfs2_journal_access, | |
5256 | }; | |
01225596 TM |
5257 | |
5258 | BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); | |
5259 | ||
fd68a894 | 5260 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, xh, |
712e53e4 TM |
5261 | xe - xh->xh_entries, |
5262 | &block_off, | |
5263 | &offset); | |
5264 | if (ret) { | |
5265 | mlog_errno(ret); | |
5266 | goto out; | |
5267 | } | |
01225596 | 5268 | |
712e53e4 TM |
5269 | base = bucket_block(xs->bucket, block_off); |
5270 | xv = (struct ocfs2_xattr_value_root *)(base + offset + | |
5271 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
01225596 | 5272 | |
492a8a33 TM |
5273 | vb.vb_xv = xv; |
5274 | vb.vb_bh = xs->bucket->bu_bhs[block_off]; | |
712e53e4 | 5275 | ret = __ocfs2_xattr_set_value_outside(inode, handle, |
492a8a33 | 5276 | &vb, val, value_len); |
712e53e4 TM |
5277 | if (ret) |
5278 | mlog_errno(ret); | |
5279 | out: | |
5280 | return ret; | |
01225596 TM |
5281 | } |
5282 | ||
01225596 TM |
5283 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5284 | struct buffer_head *root_bh, | |
5285 | u64 blkno, | |
5286 | u32 cpos, | |
47bca495 TM |
5287 | u32 len, |
5288 | void *para) | |
01225596 TM |
5289 | { |
5290 | int ret; | |
5291 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5292 | struct inode *tl_inode = osb->osb_tl_inode; | |
5293 | handle_t *handle; | |
5294 | struct ocfs2_xattr_block *xb = | |
5295 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5296 | struct ocfs2_alloc_context *meta_ac = NULL; |
5297 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5298 | struct ocfs2_extent_tree et; |
5299 | ||
47bca495 | 5300 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5301 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5302 | if (ret) { |
5303 | mlog_errno(ret); | |
5304 | return ret; | |
5305 | } | |
5306 | ||
5e404e9e | 5307 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5308 | |
5309 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5310 | ||
5311 | mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", | |
5312 | cpos, len, (unsigned long long)blkno); | |
5313 | ||
8cb471e8 JB |
5314 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5315 | len); | |
01225596 | 5316 | |
f99b9b7c | 5317 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5318 | if (ret) { |
5319 | mlog_errno(ret); | |
5320 | return ret; | |
5321 | } | |
5322 | ||
5323 | mutex_lock(&tl_inode->i_mutex); | |
5324 | ||
5325 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5326 | ret = __ocfs2_flush_truncate_log(osb); | |
5327 | if (ret < 0) { | |
5328 | mlog_errno(ret); | |
5329 | goto out; | |
5330 | } | |
5331 | } | |
5332 | ||
a90714c1 | 5333 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5334 | if (IS_ERR(handle)) { |
01225596 TM |
5335 | ret = -ENOMEM; |
5336 | mlog_errno(ret); | |
5337 | goto out; | |
5338 | } | |
5339 | ||
0cf2f763 | 5340 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5341 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5342 | if (ret) { |
5343 | mlog_errno(ret); | |
5344 | goto out_commit; | |
5345 | } | |
5346 | ||
dbdcf6a4 | 5347 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5348 | &dealloc); |
01225596 TM |
5349 | if (ret) { |
5350 | mlog_errno(ret); | |
5351 | goto out_commit; | |
5352 | } | |
5353 | ||
5354 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
5355 | ||
5356 | ret = ocfs2_journal_dirty(handle, root_bh); | |
5357 | if (ret) { | |
5358 | mlog_errno(ret); | |
5359 | goto out_commit; | |
5360 | } | |
5361 | ||
5362 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5363 | if (ret) | |
5364 | mlog_errno(ret); | |
5365 | ||
5366 | out_commit: | |
5367 | ocfs2_commit_trans(osb, handle); | |
5368 | out: | |
5369 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5370 | ||
5371 | mutex_unlock(&tl_inode->i_mutex); | |
5372 | ||
5373 | if (meta_ac) | |
5374 | ocfs2_free_alloc_context(meta_ac); | |
5375 | ||
5376 | ocfs2_run_deallocs(osb, &dealloc); | |
5377 | ||
5378 | return ret; | |
5379 | } | |
5380 | ||
01225596 | 5381 | static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, |
85db90e7 | 5382 | handle_t *handle, |
01225596 TM |
5383 | struct ocfs2_xattr_search *xs) |
5384 | { | |
ba937127 | 5385 | struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); |
01225596 TM |
5386 | struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
5387 | le16_to_cpu(xh->xh_count) - 1]; | |
5388 | int ret = 0; | |
5389 | ||
ba937127 | 5390 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
1224be02 | 5391 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5392 | if (ret) { |
5393 | mlog_errno(ret); | |
85db90e7 | 5394 | return; |
01225596 TM |
5395 | } |
5396 | ||
5397 | /* Remove the old entry. */ | |
5398 | memmove(xs->here, xs->here + 1, | |
5399 | (void *)last - (void *)xs->here); | |
5400 | memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
5401 | le16_add_cpu(&xh->xh_count, -1); | |
5402 | ||
ba937127 | 5403 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); |
01225596 TM |
5404 | } |
5405 | ||
5406 | /* | |
5407 | * Set the xattr name/value in the bucket specified in xs. | |
5408 | * | |
5409 | * As the new value in xi may be stored in the bucket or in an outside cluster, | |
5410 | * we divide the whole process into 3 steps: | |
5411 | * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) | |
5412 | * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) | |
5413 | * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) | |
5414 | * 4. If the clusters for the new outside value can't be allocated, we need | |
5415 | * to free the xattr we allocated in set. | |
5416 | */ | |
5417 | static int ocfs2_xattr_set_in_bucket(struct inode *inode, | |
5418 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5419 | struct ocfs2_xattr_search *xs, |
5420 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5421 | { |
5a095611 | 5422 | int ret, local = 1; |
01225596 | 5423 | size_t value_len; |
6b240ff6 | 5424 | char *val = (char *)xi->xi_value; |
01225596 | 5425 | struct ocfs2_xattr_entry *xe = xs->here; |
6b240ff6 JB |
5426 | u32 name_hash = ocfs2_xattr_name_hash(inode, xi->xi_name, |
5427 | strlen(xi->xi_name)); | |
01225596 TM |
5428 | |
5429 | if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { | |
5430 | /* | |
5431 | * We need to truncate the xattr storage first. | |
5432 | * | |
5433 | * If both the old and new value are stored to | |
5434 | * outside block, we only need to truncate | |
5435 | * the storage and then set the value outside. | |
5436 | * | |
5437 | * If the new value should be stored within block, | |
5438 | * we should free all the outside block first and | |
5439 | * the modification to the xattr block will be done | |
5440 | * by following steps. | |
5441 | */ | |
6b240ff6 JB |
5442 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
5443 | value_len = xi->xi_value_len; | |
01225596 TM |
5444 | else |
5445 | value_len = 0; | |
5446 | ||
5447 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 TM |
5448 | value_len, |
5449 | ctxt); | |
01225596 TM |
5450 | if (ret) |
5451 | goto out; | |
5452 | ||
5453 | if (value_len) | |
5454 | goto set_value_outside; | |
5455 | } | |
5456 | ||
6b240ff6 | 5457 | value_len = xi->xi_value_len; |
01225596 TM |
5458 | /* So we have to handle the inside block change now. */ |
5459 | if (value_len > OCFS2_XATTR_INLINE_SIZE) { | |
5460 | /* | |
5461 | * If the new value will be stored outside of block, | |
5462 | * initalize a new empty value root and insert it first. | |
5463 | */ | |
5464 | local = 0; | |
6b240ff6 JB |
5465 | xi->xi_value = &def_xv; |
5466 | xi->xi_value_len = OCFS2_XATTR_ROOT_SIZE; | |
01225596 TM |
5467 | } |
5468 | ||
85db90e7 TM |
5469 | ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, |
5470 | name_hash, local); | |
01225596 TM |
5471 | if (ret) { |
5472 | mlog_errno(ret); | |
5473 | goto out; | |
5474 | } | |
5475 | ||
5a095611 TM |
5476 | if (value_len <= OCFS2_XATTR_INLINE_SIZE) |
5477 | goto out; | |
01225596 | 5478 | |
5a095611 TM |
5479 | /* allocate the space now for the outside block storage. */ |
5480 | ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, | |
78f30c31 | 5481 | value_len, ctxt); |
5a095611 TM |
5482 | if (ret) { |
5483 | mlog_errno(ret); | |
5484 | ||
5485 | if (xs->not_found) { | |
5486 | /* | |
5487 | * We can't allocate enough clusters for outside | |
5488 | * storage and we have allocated xattr already, | |
5489 | * so need to remove it. | |
5490 | */ | |
85db90e7 | 5491 | ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); |
01225596 | 5492 | } |
01225596 TM |
5493 | goto out; |
5494 | } | |
5495 | ||
5496 | set_value_outside: | |
85db90e7 TM |
5497 | ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, |
5498 | xs, val, value_len); | |
01225596 TM |
5499 | out: |
5500 | return ret; | |
5501 | } | |
5502 | ||
80bcaf34 TM |
5503 | /* |
5504 | * check whether the xattr bucket is filled up with the same hash value. | |
5505 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5506 | * If we want to insert a xattr with different hash value, go ahead | |
5507 | * and ocfs2_divide_xattr_bucket will handle this. | |
5508 | */ | |
01225596 | 5509 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5510 | struct ocfs2_xattr_bucket *bucket, |
5511 | const char *name) | |
01225596 | 5512 | { |
3e632946 | 5513 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5514 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5515 | ||
5516 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5517 | return 0; | |
01225596 TM |
5518 | |
5519 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5520 | xh->xh_entries[0].xe_name_hash) { | |
5521 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5522 | "hash = %u\n", | |
9c7759aa | 5523 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5524 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5525 | return -ENOSPC; | |
5526 | } | |
5527 | ||
5528 | return 0; | |
5529 | } | |
5530 | ||
5531 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
5532 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
5533 | struct ocfs2_xattr_search *xs, |
5534 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5535 | { |
5536 | struct ocfs2_xattr_header *xh; | |
5537 | struct ocfs2_xattr_entry *xe; | |
5538 | u16 count, header_size, xh_free_start; | |
6dde41d9 | 5539 | int free, max_free, need, old; |
6b240ff6 | 5540 | size_t value_size = 0, name_len = strlen(xi->xi_name); |
01225596 TM |
5541 | size_t blocksize = inode->i_sb->s_blocksize; |
5542 | int ret, allocation = 0; | |
01225596 | 5543 | |
6b240ff6 | 5544 | mlog_entry("Set xattr %s in xattr index block\n", xi->xi_name); |
01225596 TM |
5545 | |
5546 | try_again: | |
5547 | xh = xs->header; | |
5548 | count = le16_to_cpu(xh->xh_count); | |
5549 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
5550 | header_size = sizeof(struct ocfs2_xattr_header) + | |
5551 | count * sizeof(struct ocfs2_xattr_entry); | |
4442f518 TY |
5552 | max_free = OCFS2_XATTR_BUCKET_SIZE - header_size - |
5553 | le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5554 | |
5555 | mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " | |
5556 | "of %u which exceed block size\n", | |
ba937127 | 5557 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5558 | header_size); |
5559 | ||
6b240ff6 | 5560 | if (xi->xi_value && xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
01225596 | 5561 | value_size = OCFS2_XATTR_ROOT_SIZE; |
6b240ff6 JB |
5562 | else if (xi->xi_value) |
5563 | value_size = OCFS2_XATTR_SIZE(xi->xi_value_len); | |
01225596 TM |
5564 | |
5565 | if (xs->not_found) | |
5566 | need = sizeof(struct ocfs2_xattr_entry) + | |
5567 | OCFS2_XATTR_SIZE(name_len) + value_size; | |
5568 | else { | |
5569 | need = value_size + OCFS2_XATTR_SIZE(name_len); | |
5570 | ||
5571 | /* | |
5572 | * We only replace the old value if the new length is smaller | |
5573 | * than the old one. Otherwise we will allocate new space in the | |
5574 | * bucket to store it. | |
5575 | */ | |
5576 | xe = xs->here; | |
5577 | if (ocfs2_xattr_is_local(xe)) | |
5578 | old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); | |
5579 | else | |
5580 | old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); | |
5581 | ||
5582 | if (old >= value_size) | |
5583 | need = 0; | |
5584 | } | |
5585 | ||
4442f518 | 5586 | free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP; |
01225596 TM |
5587 | /* |
5588 | * We need to make sure the new name/value pair | |
5589 | * can exist in the same block. | |
5590 | */ | |
5591 | if (xh_free_start % blocksize < need) | |
5592 | free -= xh_free_start % blocksize; | |
5593 | ||
5594 | mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " | |
5595 | "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" | |
5596 | " %u\n", xs->not_found, | |
ba937127 | 5597 | (unsigned long long)bucket_blkno(xs->bucket), |
01225596 TM |
5598 | free, need, max_free, le16_to_cpu(xh->xh_free_start), |
5599 | le16_to_cpu(xh->xh_name_value_len)); | |
5600 | ||
976331d8 TM |
5601 | if (free < need || |
5602 | (xs->not_found && | |
5603 | count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { | |
01225596 TM |
5604 | if (need <= max_free && |
5605 | count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { | |
5606 | /* | |
5607 | * We can create the space by defragment. Since only the | |
5608 | * name/value will be moved, the xe shouldn't be changed | |
5609 | * in xs. | |
5610 | */ | |
85db90e7 TM |
5611 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, |
5612 | xs->bucket); | |
01225596 TM |
5613 | if (ret) { |
5614 | mlog_errno(ret); | |
5615 | goto out; | |
5616 | } | |
5617 | ||
5618 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4442f518 TY |
5619 | free = xh_free_start - header_size |
5620 | - OCFS2_XATTR_HEADER_GAP; | |
01225596 TM |
5621 | if (xh_free_start % blocksize < need) |
5622 | free -= xh_free_start % blocksize; | |
5623 | ||
5624 | if (free >= need) | |
5625 | goto xattr_set; | |
5626 | ||
5627 | mlog(0, "Can't get enough space for xattr insert by " | |
5628 | "defragment. Need %u bytes, but we have %d, so " | |
5629 | "allocate new bucket for it.\n", need, free); | |
5630 | } | |
5631 | ||
5632 | /* | |
5633 | * We have to add new buckets or clusters and one | |
5634 | * allocation should leave us enough space for insert. | |
5635 | */ | |
5636 | BUG_ON(allocation); | |
5637 | ||
5638 | /* | |
5639 | * We do not allow for overlapping ranges between buckets. And | |
5640 | * the maximum number of collisions we will allow for then is | |
5641 | * one bucket's worth, so check it here whether we need to | |
5642 | * add a new bucket for the insert. | |
5643 | */ | |
80bcaf34 | 5644 | ret = ocfs2_check_xattr_bucket_collision(inode, |
ba937127 | 5645 | xs->bucket, |
6b240ff6 | 5646 | xi->xi_name); |
01225596 TM |
5647 | if (ret) { |
5648 | mlog_errno(ret); | |
5649 | goto out; | |
5650 | } | |
5651 | ||
5652 | ret = ocfs2_add_new_xattr_bucket(inode, | |
5653 | xs->xattr_bh, | |
91f2033f | 5654 | xs->bucket, |
78f30c31 | 5655 | ctxt); |
01225596 TM |
5656 | if (ret) { |
5657 | mlog_errno(ret); | |
5658 | goto out; | |
5659 | } | |
5660 | ||
91f2033f JB |
5661 | /* |
5662 | * ocfs2_add_new_xattr_bucket() will have updated | |
5663 | * xs->bucket if it moved, but it will not have updated | |
5664 | * any of the other search fields. Thus, we drop it and | |
5665 | * re-search. Everything should be cached, so it'll be | |
5666 | * quick. | |
5667 | */ | |
ba937127 | 5668 | ocfs2_xattr_bucket_relse(xs->bucket); |
01225596 | 5669 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, |
6b240ff6 JB |
5670 | xi->xi_name_index, |
5671 | xi->xi_name, xs); | |
01225596 TM |
5672 | if (ret && ret != -ENODATA) |
5673 | goto out; | |
5674 | xs->not_found = ret; | |
5675 | allocation = 1; | |
5676 | goto try_again; | |
5677 | } | |
5678 | ||
5679 | xattr_set: | |
78f30c31 | 5680 | ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); |
01225596 TM |
5681 | out: |
5682 | mlog_exit(ret); | |
5683 | return ret; | |
5684 | } | |
a3944256 TM |
5685 | |
5686 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5687 | struct ocfs2_xattr_bucket *bucket, | |
5688 | void *para) | |
5689 | { | |
ce9c5a54 | 5690 | int ret = 0, ref_credits; |
3e632946 | 5691 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5692 | u16 i; |
5693 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5694 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5695 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5696 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5697 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5698 | struct ocfs2_xattr_value_root *xv; |
5699 | struct ocfs2_rm_xattr_bucket_para *args = | |
5700 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5701 | |
5702 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5703 | |
5704 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5705 | xe = &xh->xh_entries[i]; | |
5706 | if (ocfs2_xattr_is_local(xe)) | |
5707 | continue; | |
5708 | ||
ce9c5a54 TM |
5709 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5710 | i, &xv, NULL); | |
5711 | ||
5712 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5713 | args->ref_ci, | |
5714 | args->ref_root_bh, | |
5715 | &ctxt.meta_ac, | |
5716 | &ref_credits); | |
5717 | ||
5718 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5719 | if (IS_ERR(ctxt.handle)) { |
5720 | ret = PTR_ERR(ctxt.handle); | |
5721 | mlog_errno(ret); | |
5722 | break; | |
5723 | } | |
5724 | ||
548b0f22 | 5725 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5726 | i, 0, &ctxt); |
88c3b062 TM |
5727 | |
5728 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5729 | if (ctxt.meta_ac) { |
5730 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5731 | ctxt.meta_ac = NULL; | |
5732 | } | |
a3944256 TM |
5733 | if (ret) { |
5734 | mlog_errno(ret); | |
5735 | break; | |
5736 | } | |
5737 | } | |
5738 | ||
ce9c5a54 TM |
5739 | if (ctxt.meta_ac) |
5740 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5741 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5742 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5743 | return ret; |
5744 | } | |
5745 | ||
492a8a33 TM |
5746 | /* |
5747 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5748 | * or change the extent record flag), we need to recalculate | |
5749 | * the metaecc for the whole bucket. So it is done here. | |
5750 | * | |
5751 | * Note: | |
5752 | * We have to give the extra credits for the caller. | |
5753 | */ | |
5754 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5755 | handle_t *handle, | |
5756 | void *para) | |
5757 | { | |
5758 | int ret; | |
5759 | struct ocfs2_xattr_bucket *bucket = | |
5760 | (struct ocfs2_xattr_bucket *)para; | |
5761 | ||
5762 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5763 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5764 | if (ret) { | |
5765 | mlog_errno(ret); | |
5766 | return ret; | |
5767 | } | |
5768 | ||
5769 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5770 | ||
5771 | return 0; | |
5772 | } | |
5773 | ||
5774 | /* | |
5775 | * Special action we need if the xattr value is refcounted. | |
5776 | * | |
5777 | * 1. If the xattr is refcounted, lock the tree. | |
5778 | * 2. CoW the xattr if we are setting the new value and the value | |
5779 | * will be stored outside. | |
5780 | * 3. In other case, decrease_refcount will work for us, so just | |
5781 | * lock the refcount tree, calculate the meta and credits is OK. | |
5782 | * | |
5783 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5784 | * currently CoW is a completed transaction, while this function | |
5785 | * will also lock the allocators and let us deadlock. So we will | |
5786 | * CoW the whole xattr value. | |
5787 | */ | |
5788 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5789 | struct ocfs2_dinode *di, | |
5790 | struct ocfs2_xattr_info *xi, | |
5791 | struct ocfs2_xattr_search *xis, | |
5792 | struct ocfs2_xattr_search *xbs, | |
5793 | struct ocfs2_refcount_tree **ref_tree, | |
5794 | int *meta_add, | |
5795 | int *credits) | |
5796 | { | |
5797 | int ret = 0; | |
5798 | struct ocfs2_xattr_block *xb; | |
5799 | struct ocfs2_xattr_entry *xe; | |
5800 | char *base; | |
5801 | u32 p_cluster, num_clusters; | |
5802 | unsigned int ext_flags; | |
5803 | int name_offset, name_len; | |
5804 | struct ocfs2_xattr_value_buf vb; | |
5805 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5806 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5807 | struct ocfs2_post_refcount refcount; | |
5808 | struct ocfs2_post_refcount *p = NULL; | |
5809 | struct buffer_head *ref_root_bh = NULL; | |
5810 | ||
5811 | if (!xis->not_found) { | |
5812 | xe = xis->here; | |
5813 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5814 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5815 | base = xis->base; | |
5816 | vb.vb_bh = xis->inode_bh; | |
5817 | vb.vb_access = ocfs2_journal_access_di; | |
5818 | } else { | |
5819 | int i, block_off = 0; | |
5820 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5821 | xe = xbs->here; | |
5822 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5823 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5824 | i = xbs->here - xbs->header->xh_entries; | |
5825 | ||
5826 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5827 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5828 | bucket_xh(xbs->bucket), |
5829 | i, &block_off, | |
5830 | &name_offset); | |
5831 | if (ret) { | |
5832 | mlog_errno(ret); | |
5833 | goto out; | |
5834 | } | |
5835 | base = bucket_block(xbs->bucket, block_off); | |
5836 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5837 | vb.vb_access = ocfs2_journal_access; | |
5838 | ||
5839 | if (ocfs2_meta_ecc(osb)) { | |
5840 | /*create parameters for ocfs2_post_refcount. */ | |
5841 | bucket = xbs->bucket; | |
5842 | refcount.credits = bucket->bu_blocks; | |
5843 | refcount.para = bucket; | |
5844 | refcount.func = | |
5845 | ocfs2_xattr_bucket_post_refcount; | |
5846 | p = &refcount; | |
5847 | } | |
5848 | } else { | |
5849 | base = xbs->base; | |
5850 | vb.vb_bh = xbs->xattr_bh; | |
5851 | vb.vb_access = ocfs2_journal_access_xb; | |
5852 | } | |
5853 | } | |
5854 | ||
5855 | if (ocfs2_xattr_is_local(xe)) | |
5856 | goto out; | |
5857 | ||
5858 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5859 | (base + name_offset + name_len); | |
5860 | ||
5861 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5862 | &num_clusters, &vb.vb_xv->xr_list, | |
5863 | &ext_flags); | |
5864 | if (ret) { | |
5865 | mlog_errno(ret); | |
5866 | goto out; | |
5867 | } | |
5868 | ||
5869 | /* | |
5870 | * We just need to check the 1st extent record, since we always | |
5871 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5872 | * some REFCOUNT extent recs after the 1st one. | |
5873 | */ | |
5874 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5875 | goto out; | |
5876 | ||
5877 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5878 | 1, ref_tree, &ref_root_bh); | |
5879 | if (ret) { | |
5880 | mlog_errno(ret); | |
5881 | goto out; | |
5882 | } | |
5883 | ||
5884 | /* | |
5885 | * If we are deleting the xattr or the new size will be stored inside, | |
5886 | * cool, leave it there, the xattr truncate process will remove them | |
5887 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5888 | * And the worse case is that every cluster truncate will split the | |
5889 | * refcount tree, and make the original extent become 3. So we will need | |
5890 | * 2 * cluster more extent recs at most. | |
5891 | */ | |
6b240ff6 | 5892 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
492a8a33 TM |
5893 | |
5894 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5895 | &(*ref_tree)->rf_ci, | |
5896 | ref_root_bh, vb.vb_xv, | |
5897 | meta_add, credits); | |
5898 | if (ret) | |
5899 | mlog_errno(ret); | |
5900 | goto out; | |
5901 | } | |
5902 | ||
5903 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5904 | *ref_tree, ref_root_bh, 0, | |
5905 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5906 | if (ret) | |
5907 | mlog_errno(ret); | |
5908 | ||
5909 | out: | |
5910 | brelse(ref_root_bh); | |
5911 | return ret; | |
5912 | } | |
5913 | ||
0129241e TM |
5914 | /* |
5915 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5916 | * The physical clusters will be added to refcount tree. | |
5917 | */ | |
5918 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5919 | struct ocfs2_xattr_value_root *xv, | |
5920 | struct ocfs2_extent_tree *value_et, | |
5921 | struct ocfs2_caching_info *ref_ci, | |
5922 | struct buffer_head *ref_root_bh, | |
5923 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5924 | struct ocfs2_post_refcount *refcount) | |
5925 | { | |
5926 | int ret = 0; | |
5927 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5928 | u32 cpos, p_cluster, num_clusters; | |
5929 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5930 | unsigned int ext_flags; | |
5931 | ||
5932 | cpos = 0; | |
5933 | while (cpos < clusters) { | |
5934 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5935 | &num_clusters, el, &ext_flags); | |
5936 | ||
5937 | cpos += num_clusters; | |
5938 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5939 | continue; | |
5940 | ||
5941 | BUG_ON(!p_cluster); | |
5942 | ||
5943 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5944 | ref_ci, ref_root_bh, | |
5945 | cpos - num_clusters, | |
5946 | p_cluster, num_clusters, | |
5947 | dealloc, refcount); | |
5948 | if (ret) { | |
5949 | mlog_errno(ret); | |
5950 | break; | |
5951 | } | |
5952 | } | |
5953 | ||
5954 | return ret; | |
5955 | } | |
5956 | ||
5957 | /* | |
5958 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5959 | * have value stored outside. | |
5960 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5961 | */ | |
5962 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5963 | struct ocfs2_xattr_value_buf *vb, | |
5964 | struct ocfs2_xattr_header *header, | |
5965 | struct ocfs2_caching_info *ref_ci, | |
5966 | struct buffer_head *ref_root_bh, | |
5967 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5968 | { | |
5969 | ||
5970 | struct ocfs2_xattr_entry *xe; | |
5971 | struct ocfs2_xattr_value_root *xv; | |
5972 | struct ocfs2_extent_tree et; | |
5973 | int i, ret = 0; | |
5974 | ||
5975 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5976 | xe = &header->xh_entries[i]; | |
5977 | ||
5978 | if (ocfs2_xattr_is_local(xe)) | |
5979 | continue; | |
5980 | ||
5981 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5982 | le16_to_cpu(xe->xe_name_offset) + | |
5983 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5984 | ||
5985 | vb->vb_xv = xv; | |
5986 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5987 | ||
5988 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5989 | ref_ci, ref_root_bh, | |
5990 | dealloc, NULL); | |
5991 | if (ret) { | |
5992 | mlog_errno(ret); | |
5993 | break; | |
5994 | } | |
5995 | } | |
5996 | ||
5997 | return ret; | |
5998 | } | |
5999 | ||
6000 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
6001 | struct buffer_head *fe_bh, | |
6002 | struct ocfs2_caching_info *ref_ci, | |
6003 | struct buffer_head *ref_root_bh, | |
6004 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6005 | { | |
6006 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6007 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
6008 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
6009 | le16_to_cpu(di->i_xattr_inline_size)); | |
6010 | struct ocfs2_xattr_value_buf vb = { | |
6011 | .vb_bh = fe_bh, | |
6012 | .vb_access = ocfs2_journal_access_di, | |
6013 | }; | |
6014 | ||
6015 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6016 | ref_ci, ref_root_bh, dealloc); | |
6017 | } | |
6018 | ||
6019 | struct ocfs2_xattr_tree_value_refcount_para { | |
6020 | struct ocfs2_caching_info *ref_ci; | |
6021 | struct buffer_head *ref_root_bh; | |
6022 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
6023 | }; | |
6024 | ||
6025 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
6026 | struct ocfs2_xattr_bucket *bucket, | |
6027 | int offset, | |
6028 | struct ocfs2_xattr_value_root **xv, | |
6029 | struct buffer_head **bh) | |
6030 | { | |
6031 | int ret, block_off, name_offset; | |
6032 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
6033 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6034 | void *base; | |
6035 | ||
6036 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
6037 | bucket_xh(bucket), | |
6038 | offset, | |
6039 | &block_off, | |
6040 | &name_offset); | |
6041 | if (ret) { | |
6042 | mlog_errno(ret); | |
6043 | goto out; | |
6044 | } | |
6045 | ||
6046 | base = bucket_block(bucket, block_off); | |
6047 | ||
6048 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
6049 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6050 | ||
6051 | if (bh) | |
6052 | *bh = bucket->bu_bhs[block_off]; | |
6053 | out: | |
6054 | return ret; | |
6055 | } | |
6056 | ||
6057 | /* | |
6058 | * For a given xattr bucket, refcount all the entries which | |
6059 | * have value stored outside. | |
6060 | */ | |
6061 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
6062 | struct ocfs2_xattr_bucket *bucket, | |
6063 | void *para) | |
6064 | { | |
6065 | int i, ret = 0; | |
6066 | struct ocfs2_extent_tree et; | |
6067 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
6068 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
6069 | struct ocfs2_xattr_header *xh = | |
6070 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6071 | struct ocfs2_xattr_entry *xe; | |
6072 | struct ocfs2_xattr_value_buf vb = { | |
6073 | .vb_access = ocfs2_journal_access, | |
6074 | }; | |
6075 | struct ocfs2_post_refcount refcount = { | |
6076 | .credits = bucket->bu_blocks, | |
6077 | .para = bucket, | |
6078 | .func = ocfs2_xattr_bucket_post_refcount, | |
6079 | }; | |
6080 | struct ocfs2_post_refcount *p = NULL; | |
6081 | ||
6082 | /* We only need post_refcount if we support metaecc. */ | |
6083 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
6084 | p = &refcount; | |
6085 | ||
6086 | mlog(0, "refcount bucket %llu, count = %u\n", | |
6087 | (unsigned long long)bucket_blkno(bucket), | |
6088 | le16_to_cpu(xh->xh_count)); | |
6089 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6090 | xe = &xh->xh_entries[i]; | |
6091 | ||
6092 | if (ocfs2_xattr_is_local(xe)) | |
6093 | continue; | |
6094 | ||
6095 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
6096 | &vb.vb_xv, &vb.vb_bh); | |
6097 | if (ret) { | |
6098 | mlog_errno(ret); | |
6099 | break; | |
6100 | } | |
6101 | ||
6102 | ocfs2_init_xattr_value_extent_tree(&et, | |
6103 | INODE_CACHE(inode), &vb); | |
6104 | ||
6105 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
6106 | &et, ref->ref_ci, | |
6107 | ref->ref_root_bh, | |
6108 | ref->dealloc, p); | |
6109 | if (ret) { | |
6110 | mlog_errno(ret); | |
6111 | break; | |
6112 | } | |
6113 | } | |
6114 | ||
6115 | return ret; | |
6116 | ||
6117 | } | |
6118 | ||
6119 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
6120 | struct buffer_head *root_bh, | |
6121 | u64 blkno, u32 cpos, u32 len, void *para) | |
6122 | { | |
6123 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
6124 | ocfs2_xattr_bucket_value_refcount, | |
6125 | para); | |
6126 | } | |
6127 | ||
6128 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
6129 | struct buffer_head *blk_bh, | |
6130 | struct ocfs2_caching_info *ref_ci, | |
6131 | struct buffer_head *ref_root_bh, | |
6132 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6133 | { | |
6134 | int ret = 0; | |
6135 | struct ocfs2_xattr_block *xb = | |
6136 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6137 | ||
6138 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
6139 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
6140 | struct ocfs2_xattr_value_buf vb = { | |
6141 | .vb_bh = blk_bh, | |
6142 | .vb_access = ocfs2_journal_access_xb, | |
6143 | }; | |
6144 | ||
6145 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6146 | ref_ci, ref_root_bh, | |
6147 | dealloc); | |
6148 | } else { | |
6149 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
6150 | .ref_ci = ref_ci, | |
6151 | .ref_root_bh = ref_root_bh, | |
6152 | .dealloc = dealloc, | |
6153 | }; | |
6154 | ||
6155 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
6156 | ocfs2_refcount_xattr_tree_rec, | |
6157 | ¶); | |
6158 | } | |
6159 | ||
6160 | return ret; | |
6161 | } | |
6162 | ||
6163 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
6164 | struct buffer_head *fe_bh, | |
6165 | struct ocfs2_caching_info *ref_ci, | |
6166 | struct buffer_head *ref_root_bh, | |
6167 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6168 | { | |
6169 | int ret = 0; | |
6170 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
6171 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6172 | struct buffer_head *blk_bh = NULL; | |
6173 | ||
6174 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6175 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
6176 | ref_ci, ref_root_bh, | |
6177 | dealloc); | |
6178 | if (ret) { | |
6179 | mlog_errno(ret); | |
6180 | goto out; | |
6181 | } | |
6182 | } | |
6183 | ||
6184 | if (!di->i_xattr_loc) | |
6185 | goto out; | |
6186 | ||
6187 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
6188 | &blk_bh); | |
6189 | if (ret < 0) { | |
6190 | mlog_errno(ret); | |
6191 | goto out; | |
6192 | } | |
6193 | ||
6194 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
6195 | ref_root_bh, dealloc); | |
6196 | if (ret) | |
6197 | mlog_errno(ret); | |
6198 | ||
6199 | brelse(blk_bh); | |
6200 | out: | |
6201 | ||
6202 | return ret; | |
6203 | } | |
6204 | ||
0fe9b66c | 6205 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6206 | /* |
6207 | * Store the information we need in xattr reflink. | |
6208 | * old_bh and new_bh are inode bh for the old and new inode. | |
6209 | */ | |
6210 | struct ocfs2_xattr_reflink { | |
6211 | struct inode *old_inode; | |
6212 | struct inode *new_inode; | |
6213 | struct buffer_head *old_bh; | |
6214 | struct buffer_head *new_bh; | |
6215 | struct ocfs2_caching_info *ref_ci; | |
6216 | struct buffer_head *ref_root_bh; | |
6217 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6218 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6219 | }; |
6220 | ||
6221 | /* | |
6222 | * Given a xattr header and xe offset, | |
6223 | * return the proper xv and the corresponding bh. | |
6224 | * xattr in inode, block and xattr tree have different implementaions. | |
6225 | */ | |
6226 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6227 | struct buffer_head *bh, | |
6228 | struct ocfs2_xattr_header *xh, | |
6229 | int offset, | |
6230 | struct ocfs2_xattr_value_root **xv, | |
6231 | struct buffer_head **ret_bh, | |
6232 | void *para); | |
6233 | ||
6234 | /* | |
6235 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6236 | * credits we need if we create them from the scratch. | |
6237 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6238 | */ | |
6239 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6240 | struct buffer_head *bh, | |
6241 | struct ocfs2_xattr_header *xh, | |
6242 | int *metas, int *credits, | |
6243 | int *num_recs, | |
6244 | get_xattr_value_root *func, | |
6245 | void *para) | |
6246 | { | |
6247 | int i, ret = 0; | |
6248 | struct ocfs2_xattr_value_root *xv; | |
6249 | struct ocfs2_xattr_entry *xe; | |
6250 | ||
6251 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6252 | xe = &xh->xh_entries[i]; | |
6253 | if (ocfs2_xattr_is_local(xe)) | |
6254 | continue; | |
6255 | ||
6256 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6257 | if (ret) { | |
6258 | mlog_errno(ret); | |
6259 | break; | |
6260 | } | |
6261 | ||
6262 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6263 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6264 | ||
6265 | *credits += ocfs2_calc_extend_credits(sb, | |
6266 | &def_xv.xv.xr_list, | |
6267 | le32_to_cpu(xv->xr_clusters)); | |
6268 | ||
6269 | /* | |
6270 | * If the value is a tree with depth > 1, We don't go deep | |
6271 | * to the extent block, so just calculate a maximum record num. | |
6272 | */ | |
6273 | if (!xv->xr_list.l_tree_depth) | |
8ff6af88 | 6274 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
2999d12f TM |
6275 | else |
6276 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6277 | XATTR_SIZE_MAX); | |
6278 | } | |
6279 | ||
6280 | return ret; | |
6281 | } | |
6282 | ||
6283 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6284 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6285 | struct buffer_head *bh, | |
6286 | struct ocfs2_xattr_header *xh, | |
6287 | int offset, | |
6288 | struct ocfs2_xattr_value_root **xv, | |
6289 | struct buffer_head **ret_bh, | |
6290 | void *para) | |
6291 | { | |
6292 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6293 | ||
6294 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6295 | le16_to_cpu(xe->xe_name_offset) + | |
6296 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6297 | ||
6298 | if (ret_bh) | |
6299 | *ret_bh = bh; | |
6300 | ||
6301 | return 0; | |
6302 | } | |
6303 | ||
6304 | /* | |
6305 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6306 | * It is only used for inline xattr and xattr block. | |
6307 | */ | |
6308 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6309 | struct ocfs2_xattr_header *xh, | |
6310 | struct buffer_head *ref_root_bh, | |
6311 | int *credits, | |
6312 | struct ocfs2_alloc_context **meta_ac) | |
6313 | { | |
6314 | int ret, meta_add = 0, num_recs = 0; | |
6315 | struct ocfs2_refcount_block *rb = | |
6316 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6317 | ||
6318 | *credits = 0; | |
6319 | ||
6320 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6321 | &meta_add, credits, &num_recs, | |
6322 | ocfs2_get_xattr_value_root, | |
6323 | NULL); | |
6324 | if (ret) { | |
6325 | mlog_errno(ret); | |
6326 | goto out; | |
6327 | } | |
6328 | ||
6329 | /* | |
6330 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6331 | * an approximate number we need for refcount tree change. | |
6332 | * Sometimes we need to split the tree, and after split, half recs | |
6333 | * will be moved to the new block, and a new block can only provide | |
6334 | * half number of recs. So we multiple new blocks by 2. | |
6335 | */ | |
6336 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6337 | meta_add += num_recs; | |
6338 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6339 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6340 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6341 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6342 | else | |
6343 | *credits += 1; | |
6344 | ||
6345 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6346 | if (ret) | |
6347 | mlog_errno(ret); | |
6348 | ||
6349 | out: | |
6350 | return ret; | |
6351 | } | |
6352 | ||
6353 | /* | |
6354 | * Given a xattr header, reflink all the xattrs in this container. | |
6355 | * It can be used for inode, block and bucket. | |
6356 | * | |
6357 | * NOTE: | |
6358 | * Before we call this function, the caller has memcpy the xattr in | |
6359 | * old_xh to the new_xh. | |
0fe9b66c TM |
6360 | * |
6361 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6362 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6363 | */ |
6364 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6365 | struct ocfs2_xattr_reflink *args, | |
6366 | struct buffer_head *old_bh, | |
6367 | struct ocfs2_xattr_header *xh, | |
6368 | struct buffer_head *new_bh, | |
6369 | struct ocfs2_xattr_header *new_xh, | |
6370 | struct ocfs2_xattr_value_buf *vb, | |
6371 | struct ocfs2_alloc_context *meta_ac, | |
6372 | get_xattr_value_root *func, | |
6373 | void *para) | |
6374 | { | |
0fe9b66c | 6375 | int ret = 0, i, j; |
2999d12f TM |
6376 | struct super_block *sb = args->old_inode->i_sb; |
6377 | struct buffer_head *value_bh; | |
0fe9b66c | 6378 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6379 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6380 | struct ocfs2_extent_tree data_et; | |
6381 | u32 clusters, cpos, p_cluster, num_clusters; | |
6382 | unsigned int ext_flags = 0; | |
6383 | ||
6384 | mlog(0, "reflink xattr in container %llu, count = %u\n", | |
6385 | (unsigned long long)old_bh->b_blocknr, le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6386 | |
6387 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6388 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6389 | xe = &xh->xh_entries[i]; |
6390 | ||
0fe9b66c TM |
6391 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6392 | xe = &new_xh->xh_entries[j]; | |
6393 | ||
6394 | le16_add_cpu(&new_xh->xh_count, -1); | |
6395 | if (new_xh->xh_count) { | |
6396 | memmove(xe, xe + 1, | |
6397 | (void *)last - (void *)xe); | |
6398 | memset(last, 0, | |
6399 | sizeof(struct ocfs2_xattr_entry)); | |
6400 | } | |
6401 | ||
6402 | /* | |
6403 | * We don't want j to increase in the next round since | |
6404 | * it is already moved ahead. | |
6405 | */ | |
6406 | j--; | |
6407 | continue; | |
6408 | } | |
6409 | ||
2999d12f TM |
6410 | if (ocfs2_xattr_is_local(xe)) |
6411 | continue; | |
6412 | ||
6413 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6414 | if (ret) { | |
6415 | mlog_errno(ret); | |
6416 | break; | |
6417 | } | |
6418 | ||
0fe9b66c | 6419 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6420 | if (ret) { |
6421 | mlog_errno(ret); | |
6422 | break; | |
6423 | } | |
6424 | ||
6425 | /* | |
6426 | * For the xattr which has l_tree_depth = 0, all the extent | |
6427 | * recs have already be copied to the new xh with the | |
6428 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6429 | * increase the refount count int the refcount tree. | |
6430 | * | |
6431 | * For the xattr which has l_tree_depth > 0, we need | |
6432 | * to initialize it to the empty default value root, | |
6433 | * and then insert the extents one by one. | |
6434 | */ | |
6435 | if (xv->xr_list.l_tree_depth) { | |
6436 | memcpy(new_xv, &def_xv, sizeof(def_xv)); | |
6437 | vb->vb_xv = new_xv; | |
6438 | vb->vb_bh = value_bh; | |
6439 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6440 | INODE_CACHE(args->new_inode), vb); | |
6441 | } | |
6442 | ||
6443 | clusters = le32_to_cpu(xv->xr_clusters); | |
6444 | cpos = 0; | |
6445 | while (cpos < clusters) { | |
6446 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6447 | cpos, | |
6448 | &p_cluster, | |
6449 | &num_clusters, | |
6450 | &xv->xr_list, | |
6451 | &ext_flags); | |
6452 | if (ret) { | |
6453 | mlog_errno(ret); | |
6454 | goto out; | |
6455 | } | |
6456 | ||
6457 | BUG_ON(!p_cluster); | |
6458 | ||
6459 | if (xv->xr_list.l_tree_depth) { | |
6460 | ret = ocfs2_insert_extent(handle, | |
6461 | &data_et, cpos, | |
6462 | ocfs2_clusters_to_blocks( | |
6463 | args->old_inode->i_sb, | |
6464 | p_cluster), | |
6465 | num_clusters, ext_flags, | |
6466 | meta_ac); | |
6467 | if (ret) { | |
6468 | mlog_errno(ret); | |
6469 | goto out; | |
6470 | } | |
6471 | } | |
6472 | ||
6473 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6474 | args->ref_root_bh, | |
6475 | p_cluster, num_clusters, | |
6476 | meta_ac, args->dealloc); | |
6477 | if (ret) { | |
6478 | mlog_errno(ret); | |
6479 | goto out; | |
6480 | } | |
6481 | ||
6482 | cpos += num_clusters; | |
6483 | } | |
6484 | } | |
6485 | ||
6486 | out: | |
6487 | return ret; | |
6488 | } | |
6489 | ||
6490 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6491 | { | |
6492 | int ret = 0, credits = 0; | |
6493 | handle_t *handle; | |
6494 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6495 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6496 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6497 | int header_off = osb->sb->s_blocksize - inline_size; | |
6498 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6499 | (args->old_bh->b_data + header_off); | |
6500 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6501 | (args->new_bh->b_data + header_off); | |
6502 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6503 | struct ocfs2_inode_info *new_oi; | |
6504 | struct ocfs2_dinode *new_di; | |
6505 | struct ocfs2_xattr_value_buf vb = { | |
6506 | .vb_bh = args->new_bh, | |
6507 | .vb_access = ocfs2_journal_access_di, | |
6508 | }; | |
6509 | ||
6510 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6511 | &credits, &meta_ac); | |
6512 | if (ret) { | |
6513 | mlog_errno(ret); | |
6514 | goto out; | |
6515 | } | |
6516 | ||
6517 | handle = ocfs2_start_trans(osb, credits); | |
6518 | if (IS_ERR(handle)) { | |
6519 | ret = PTR_ERR(handle); | |
6520 | mlog_errno(ret); | |
6521 | goto out; | |
6522 | } | |
6523 | ||
6524 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6525 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6526 | if (ret) { | |
6527 | mlog_errno(ret); | |
6528 | goto out_commit; | |
6529 | } | |
6530 | ||
6531 | memcpy(args->new_bh->b_data + header_off, | |
6532 | args->old_bh->b_data + header_off, inline_size); | |
6533 | ||
6534 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6535 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6536 | ||
6537 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6538 | args->new_bh, new_xh, &vb, meta_ac, | |
6539 | ocfs2_get_xattr_value_root, NULL); | |
6540 | if (ret) { | |
6541 | mlog_errno(ret); | |
6542 | goto out_commit; | |
6543 | } | |
6544 | ||
6545 | new_oi = OCFS2_I(args->new_inode); | |
6546 | spin_lock(&new_oi->ip_lock); | |
6547 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6548 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6549 | spin_unlock(&new_oi->ip_lock); | |
6550 | ||
6551 | ocfs2_journal_dirty(handle, args->new_bh); | |
6552 | ||
6553 | out_commit: | |
6554 | ocfs2_commit_trans(osb, handle); | |
6555 | ||
6556 | out: | |
6557 | if (meta_ac) | |
6558 | ocfs2_free_alloc_context(meta_ac); | |
6559 | return ret; | |
6560 | } | |
6561 | ||
6562 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6563 | struct buffer_head *fe_bh, | |
6564 | struct buffer_head **ret_bh, | |
6565 | int indexed) | |
6566 | { | |
6567 | int ret; | |
6568 | handle_t *handle; | |
6569 | struct ocfs2_alloc_context *meta_ac; | |
6570 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6571 | ||
6572 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
6573 | if (ret < 0) { | |
6574 | mlog_errno(ret); | |
6575 | return ret; | |
6576 | } | |
6577 | ||
6578 | handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
6579 | if (IS_ERR(handle)) { | |
6580 | ret = PTR_ERR(handle); | |
6581 | mlog_errno(ret); | |
6582 | goto out; | |
6583 | } | |
6584 | ||
6585 | mlog(0, "create new xattr block for inode %llu, index = %d\n", | |
6586 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
6587 | ret = ocfs2_create_xattr_block(handle, inode, fe_bh, | |
6588 | meta_ac, ret_bh, indexed); | |
6589 | if (ret) | |
6590 | mlog_errno(ret); | |
6591 | ||
6592 | ocfs2_commit_trans(osb, handle); | |
6593 | out: | |
6594 | ocfs2_free_alloc_context(meta_ac); | |
6595 | return ret; | |
6596 | } | |
6597 | ||
6598 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6599 | struct buffer_head *blk_bh, | |
6600 | struct buffer_head *new_blk_bh) | |
6601 | { | |
6602 | int ret = 0, credits = 0; | |
6603 | handle_t *handle; | |
6604 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6605 | struct ocfs2_dinode *new_di; | |
6606 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6607 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6608 | struct ocfs2_xattr_block *xb = | |
6609 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6610 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6611 | struct ocfs2_xattr_block *new_xb = | |
6612 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6613 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6614 | struct ocfs2_alloc_context *meta_ac; | |
6615 | struct ocfs2_xattr_value_buf vb = { | |
6616 | .vb_bh = new_blk_bh, | |
6617 | .vb_access = ocfs2_journal_access_xb, | |
6618 | }; | |
6619 | ||
6620 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6621 | &credits, &meta_ac); | |
6622 | if (ret) { | |
6623 | mlog_errno(ret); | |
6624 | return ret; | |
6625 | } | |
6626 | ||
6627 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6628 | handle = ocfs2_start_trans(osb, credits + 1); | |
6629 | if (IS_ERR(handle)) { | |
6630 | ret = PTR_ERR(handle); | |
6631 | mlog_errno(ret); | |
6632 | goto out; | |
6633 | } | |
6634 | ||
6635 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6636 | ret = ocfs2_journal_access_di(handle, | |
6637 | INODE_CACHE(args->new_inode), | |
6638 | args->new_bh, | |
6639 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6640 | if (ret) { | |
6641 | mlog_errno(ret); | |
6642 | goto out_commit; | |
6643 | } | |
6644 | } | |
6645 | ||
6646 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6647 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6648 | if (ret) { | |
6649 | mlog_errno(ret); | |
6650 | goto out_commit; | |
6651 | } | |
6652 | ||
6653 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6654 | osb->sb->s_blocksize - header_off); | |
6655 | ||
6656 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6657 | new_blk_bh, new_xh, &vb, meta_ac, | |
6658 | ocfs2_get_xattr_value_root, NULL); | |
6659 | if (ret) { | |
6660 | mlog_errno(ret); | |
6661 | goto out_commit; | |
6662 | } | |
6663 | ||
6664 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6665 | ||
6666 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6667 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6668 | spin_lock(&new_oi->ip_lock); | |
6669 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6670 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6671 | spin_unlock(&new_oi->ip_lock); | |
6672 | ||
6673 | ocfs2_journal_dirty(handle, args->new_bh); | |
6674 | } | |
6675 | ||
6676 | out_commit: | |
6677 | ocfs2_commit_trans(osb, handle); | |
6678 | ||
6679 | out: | |
6680 | ocfs2_free_alloc_context(meta_ac); | |
6681 | return ret; | |
6682 | } | |
6683 | ||
6684 | struct ocfs2_reflink_xattr_tree_args { | |
6685 | struct ocfs2_xattr_reflink *reflink; | |
6686 | struct buffer_head *old_blk_bh; | |
6687 | struct buffer_head *new_blk_bh; | |
6688 | struct ocfs2_xattr_bucket *old_bucket; | |
6689 | struct ocfs2_xattr_bucket *new_bucket; | |
6690 | }; | |
6691 | ||
6692 | /* | |
6693 | * NOTE: | |
6694 | * We have to handle the case that both old bucket and new bucket | |
6695 | * will call this function to get the right ret_bh. | |
6696 | * So The caller must give us the right bh. | |
6697 | */ | |
6698 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6699 | struct buffer_head *bh, | |
6700 | struct ocfs2_xattr_header *xh, | |
6701 | int offset, | |
6702 | struct ocfs2_xattr_value_root **xv, | |
6703 | struct buffer_head **ret_bh, | |
6704 | void *para) | |
6705 | { | |
6706 | struct ocfs2_reflink_xattr_tree_args *args = | |
6707 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6708 | struct ocfs2_xattr_bucket *bucket; | |
6709 | ||
6710 | if (bh == args->old_bucket->bu_bhs[0]) | |
6711 | bucket = args->old_bucket; | |
6712 | else | |
6713 | bucket = args->new_bucket; | |
6714 | ||
6715 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6716 | xv, ret_bh); | |
6717 | } | |
6718 | ||
6719 | struct ocfs2_value_tree_metas { | |
6720 | int num_metas; | |
6721 | int credits; | |
6722 | int num_recs; | |
6723 | }; | |
6724 | ||
6725 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6726 | struct buffer_head *bh, | |
6727 | struct ocfs2_xattr_header *xh, | |
6728 | int offset, | |
6729 | struct ocfs2_xattr_value_root **xv, | |
6730 | struct buffer_head **ret_bh, | |
6731 | void *para) | |
6732 | { | |
6733 | struct ocfs2_xattr_bucket *bucket = | |
6734 | (struct ocfs2_xattr_bucket *)para; | |
6735 | ||
6736 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6737 | xv, ret_bh); | |
6738 | } | |
6739 | ||
6740 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6741 | struct ocfs2_xattr_bucket *bucket, | |
6742 | void *para) | |
6743 | { | |
6744 | struct ocfs2_value_tree_metas *metas = | |
6745 | (struct ocfs2_value_tree_metas *)para; | |
6746 | struct ocfs2_xattr_header *xh = | |
6747 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6748 | ||
6749 | /* Add the credits for this bucket first. */ | |
6750 | metas->credits += bucket->bu_blocks; | |
6751 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6752 | xh, &metas->num_metas, | |
6753 | &metas->credits, &metas->num_recs, | |
6754 | ocfs2_value_tree_metas_in_bucket, | |
6755 | bucket); | |
6756 | } | |
6757 | ||
6758 | /* | |
6759 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6760 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6761 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6762 | */ | |
6763 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6764 | struct ocfs2_reflink_xattr_tree_args *args, | |
6765 | struct ocfs2_extent_tree *xt_et, | |
6766 | u64 blkno, u32 len, int *credits, | |
6767 | struct ocfs2_alloc_context **meta_ac, | |
6768 | struct ocfs2_alloc_context **data_ac) | |
6769 | { | |
6770 | int ret, num_free_extents; | |
6771 | struct ocfs2_value_tree_metas metas; | |
6772 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6773 | struct ocfs2_refcount_block *rb; | |
6774 | ||
6775 | memset(&metas, 0, sizeof(metas)); | |
6776 | ||
6777 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6778 | ocfs2_calc_value_tree_metas, &metas); | |
6779 | if (ret) { | |
6780 | mlog_errno(ret); | |
6781 | goto out; | |
6782 | } | |
6783 | ||
6784 | *credits = metas.credits; | |
6785 | ||
6786 | /* | |
6787 | * Calculate we need for refcount tree change. | |
6788 | * | |
6789 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6790 | * an approximate number we need for refcount tree change. | |
6791 | * Sometimes we need to split the tree, and after split, half recs | |
6792 | * will be moved to the new block, and a new block can only provide | |
6793 | * half number of recs. So we multiple new blocks by 2. | |
6794 | * In the end, we have to add credits for modifying the already | |
6795 | * existed refcount block. | |
6796 | */ | |
6797 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6798 | metas.num_recs = | |
6799 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6800 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6801 | metas.num_metas += metas.num_recs; | |
6802 | *credits += metas.num_recs + | |
6803 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6804 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6805 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6806 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6807 | else | |
6808 | *credits += 1; | |
6809 | ||
6810 | /* count in the xattr tree change. */ | |
6811 | num_free_extents = ocfs2_num_free_extents(osb, xt_et); | |
6812 | if (num_free_extents < 0) { | |
6813 | ret = num_free_extents; | |
6814 | mlog_errno(ret); | |
6815 | goto out; | |
6816 | } | |
6817 | ||
6818 | if (num_free_extents < len) | |
6819 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6820 | ||
6821 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
6822 | xt_et->et_root_el, len); | |
6823 | ||
6824 | if (metas.num_metas) { | |
6825 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6826 | meta_ac); | |
6827 | if (ret) { | |
6828 | mlog_errno(ret); | |
6829 | goto out; | |
6830 | } | |
6831 | } | |
6832 | ||
6833 | if (len) { | |
6834 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6835 | if (ret) | |
6836 | mlog_errno(ret); | |
6837 | } | |
6838 | out: | |
6839 | if (ret) { | |
6840 | if (*meta_ac) { | |
6841 | ocfs2_free_alloc_context(*meta_ac); | |
6842 | meta_ac = NULL; | |
6843 | } | |
6844 | } | |
6845 | ||
6846 | return ret; | |
6847 | } | |
6848 | ||
6849 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6850 | u64 blkno, u64 new_blkno, u32 clusters, | |
6851 | struct ocfs2_alloc_context *meta_ac, | |
6852 | struct ocfs2_alloc_context *data_ac, | |
6853 | struct ocfs2_reflink_xattr_tree_args *args) | |
6854 | { | |
6855 | int i, j, ret = 0; | |
6856 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
6857 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
6858 | u32 num_buckets = clusters * bpc; | |
6859 | int bpb = args->old_bucket->bu_blocks; | |
6860 | struct ocfs2_xattr_value_buf vb = { | |
6861 | .vb_access = ocfs2_journal_access, | |
6862 | }; | |
6863 | ||
6864 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6865 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6866 | if (ret) { | |
6867 | mlog_errno(ret); | |
6868 | break; | |
6869 | } | |
6870 | ||
6871 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno); | |
6872 | if (ret) { | |
6873 | mlog_errno(ret); | |
6874 | break; | |
6875 | } | |
6876 | ||
6877 | /* | |
6878 | * The real bucket num in this series of blocks is stored | |
6879 | * in the 1st bucket. | |
6880 | */ | |
6881 | if (i == 0) | |
6882 | num_buckets = le16_to_cpu( | |
6883 | bucket_xh(args->old_bucket)->xh_num_buckets); | |
6884 | ||
6885 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6886 | args->new_bucket, | |
6887 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6888 | if (ret) { | |
6889 | mlog_errno(ret); | |
6890 | break; | |
6891 | } | |
6892 | ||
6893 | for (j = 0; j < bpb; j++) | |
6894 | memcpy(bucket_block(args->new_bucket, j), | |
6895 | bucket_block(args->old_bucket, j), | |
6896 | sb->s_blocksize); | |
6897 | ||
6898 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6899 | ||
6900 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6901 | args->old_bucket->bu_bhs[0], | |
6902 | bucket_xh(args->old_bucket), | |
6903 | args->new_bucket->bu_bhs[0], | |
6904 | bucket_xh(args->new_bucket), | |
6905 | &vb, meta_ac, | |
6906 | ocfs2_get_reflink_xattr_value_root, | |
6907 | args); | |
6908 | if (ret) { | |
6909 | mlog_errno(ret); | |
6910 | break; | |
6911 | } | |
6912 | ||
6913 | /* | |
6914 | * Re-access and dirty the bucket to calculate metaecc. | |
6915 | * Because we may extend the transaction in reflink_xattr_header | |
6916 | * which will let the already accessed block gone. | |
6917 | */ | |
6918 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6919 | args->new_bucket, | |
6920 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6921 | if (ret) { | |
6922 | mlog_errno(ret); | |
6923 | break; | |
6924 | } | |
6925 | ||
6926 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
6927 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6928 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6929 | } | |
6930 | ||
6931 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6932 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6933 | return ret; | |
6934 | } | |
6935 | /* | |
6936 | * Create the same xattr extent record in the new inode's xattr tree. | |
6937 | */ | |
6938 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
6939 | struct buffer_head *root_bh, | |
6940 | u64 blkno, | |
6941 | u32 cpos, | |
6942 | u32 len, | |
6943 | void *para) | |
6944 | { | |
6945 | int ret, credits = 0; | |
6946 | u32 p_cluster, num_clusters; | |
6947 | u64 new_blkno; | |
6948 | handle_t *handle; | |
6949 | struct ocfs2_reflink_xattr_tree_args *args = | |
6950 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6951 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
6952 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6953 | struct ocfs2_alloc_context *data_ac = NULL; | |
6954 | struct ocfs2_extent_tree et; | |
6955 | ||
6956 | ocfs2_init_xattr_tree_extent_tree(&et, | |
6957 | INODE_CACHE(args->reflink->new_inode), | |
6958 | args->new_blk_bh); | |
6959 | ||
6960 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
6961 | len, &credits, | |
6962 | &meta_ac, &data_ac); | |
6963 | if (ret) { | |
6964 | mlog_errno(ret); | |
6965 | goto out; | |
6966 | } | |
6967 | ||
6968 | handle = ocfs2_start_trans(osb, credits); | |
6969 | if (IS_ERR(handle)) { | |
6970 | ret = PTR_ERR(handle); | |
6971 | mlog_errno(ret); | |
6972 | goto out; | |
6973 | } | |
6974 | ||
6975 | ret = ocfs2_claim_clusters(osb, handle, data_ac, | |
6976 | len, &p_cluster, &num_clusters); | |
6977 | if (ret) { | |
6978 | mlog_errno(ret); | |
6979 | goto out_commit; | |
6980 | } | |
6981 | ||
6982 | new_blkno = ocfs2_clusters_to_blocks(osb->sb, p_cluster); | |
6983 | ||
6984 | mlog(0, "reflink xattr buckets %llu to %llu, len %u\n", | |
6985 | (unsigned long long)blkno, (unsigned long long)new_blkno, len); | |
6986 | ret = ocfs2_reflink_xattr_buckets(handle, blkno, new_blkno, len, | |
6987 | meta_ac, data_ac, args); | |
6988 | if (ret) { | |
6989 | mlog_errno(ret); | |
6990 | goto out_commit; | |
6991 | } | |
6992 | ||
6993 | mlog(0, "insert new xattr extent rec start %llu len %u to %u\n", | |
6994 | (unsigned long long)new_blkno, len, cpos); | |
6995 | ret = ocfs2_insert_extent(handle, &et, cpos, new_blkno, | |
6996 | len, 0, meta_ac); | |
6997 | if (ret) | |
6998 | mlog_errno(ret); | |
6999 | ||
7000 | out_commit: | |
7001 | ocfs2_commit_trans(osb, handle); | |
7002 | ||
7003 | out: | |
7004 | if (meta_ac) | |
7005 | ocfs2_free_alloc_context(meta_ac); | |
7006 | if (data_ac) | |
7007 | ocfs2_free_alloc_context(data_ac); | |
7008 | return ret; | |
7009 | } | |
7010 | ||
7011 | /* | |
7012 | * Create reflinked xattr buckets. | |
7013 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
7014 | * if they are stored outside. | |
7015 | */ | |
7016 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
7017 | struct buffer_head *blk_bh, | |
7018 | struct buffer_head *new_blk_bh) | |
7019 | { | |
7020 | int ret; | |
7021 | struct ocfs2_reflink_xattr_tree_args para; | |
7022 | ||
7023 | memset(¶, 0, sizeof(para)); | |
7024 | para.reflink = args; | |
7025 | para.old_blk_bh = blk_bh; | |
7026 | para.new_blk_bh = new_blk_bh; | |
7027 | ||
7028 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
7029 | if (!para.old_bucket) { | |
7030 | mlog_errno(-ENOMEM); | |
7031 | return -ENOMEM; | |
7032 | } | |
7033 | ||
7034 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
7035 | if (!para.new_bucket) { | |
7036 | ret = -ENOMEM; | |
7037 | mlog_errno(ret); | |
7038 | goto out; | |
7039 | } | |
7040 | ||
7041 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
7042 | ocfs2_reflink_xattr_rec, | |
7043 | ¶); | |
7044 | if (ret) | |
7045 | mlog_errno(ret); | |
7046 | ||
7047 | out: | |
7048 | ocfs2_xattr_bucket_free(para.old_bucket); | |
7049 | ocfs2_xattr_bucket_free(para.new_bucket); | |
7050 | return ret; | |
7051 | } | |
7052 | ||
7053 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
7054 | struct buffer_head *blk_bh) | |
7055 | { | |
7056 | int ret, indexed = 0; | |
7057 | struct buffer_head *new_blk_bh = NULL; | |
7058 | struct ocfs2_xattr_block *xb = | |
7059 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
7060 | ||
7061 | ||
7062 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
7063 | indexed = 1; | |
7064 | ||
7065 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
7066 | &new_blk_bh, indexed); | |
7067 | if (ret) { | |
7068 | mlog_errno(ret); | |
7069 | goto out; | |
7070 | } | |
7071 | ||
7072 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) | |
7073 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); | |
7074 | else | |
7075 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
7076 | if (ret) | |
7077 | mlog_errno(ret); | |
7078 | ||
7079 | out: | |
7080 | brelse(new_blk_bh); | |
7081 | return ret; | |
7082 | } | |
7083 | ||
0fe9b66c TM |
7084 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
7085 | { | |
7086 | int type = ocfs2_xattr_get_type(xe); | |
7087 | ||
7088 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
7089 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
7090 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
7091 | } | |
7092 | ||
2999d12f TM |
7093 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
7094 | struct buffer_head *old_bh, | |
7095 | struct inode *new_inode, | |
0fe9b66c TM |
7096 | struct buffer_head *new_bh, |
7097 | bool preserve_security) | |
2999d12f TM |
7098 | { |
7099 | int ret; | |
7100 | struct ocfs2_xattr_reflink args; | |
7101 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
7102 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
7103 | struct buffer_head *blk_bh = NULL; | |
7104 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
7105 | struct ocfs2_refcount_tree *ref_tree; | |
7106 | struct buffer_head *ref_root_bh = NULL; | |
7107 | ||
7108 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7109 | le64_to_cpu(di->i_refcount_loc), | |
7110 | 1, &ref_tree, &ref_root_bh); | |
7111 | if (ret) { | |
7112 | mlog_errno(ret); | |
7113 | goto out; | |
7114 | } | |
7115 | ||
7116 | ocfs2_init_dealloc_ctxt(&dealloc); | |
7117 | ||
7118 | args.old_inode = old_inode; | |
7119 | args.new_inode = new_inode; | |
7120 | args.old_bh = old_bh; | |
7121 | args.new_bh = new_bh; | |
7122 | args.ref_ci = &ref_tree->rf_ci; | |
7123 | args.ref_root_bh = ref_root_bh; | |
7124 | args.dealloc = &dealloc; | |
0fe9b66c TM |
7125 | if (preserve_security) |
7126 | args.xattr_reflinked = NULL; | |
7127 | else | |
7128 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
7129 | |
7130 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
7131 | ret = ocfs2_reflink_xattr_inline(&args); | |
7132 | if (ret) { | |
7133 | mlog_errno(ret); | |
7134 | goto out_unlock; | |
7135 | } | |
7136 | } | |
7137 | ||
7138 | if (!di->i_xattr_loc) | |
7139 | goto out_unlock; | |
7140 | ||
7141 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
7142 | &blk_bh); | |
7143 | if (ret < 0) { | |
7144 | mlog_errno(ret); | |
7145 | goto out_unlock; | |
7146 | } | |
7147 | ||
7148 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
7149 | if (ret) | |
7150 | mlog_errno(ret); | |
7151 | ||
7152 | brelse(blk_bh); | |
7153 | ||
7154 | out_unlock: | |
7155 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7156 | ref_tree, 1); | |
7157 | brelse(ref_root_bh); | |
7158 | ||
7159 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
7160 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
7161 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
7162 | } | |
7163 | ||
7164 | out: | |
7165 | return ret; | |
7166 | } | |
7167 | ||
0fe9b66c TM |
7168 | /* |
7169 | * Initialize security and acl for a already created inode. | |
7170 | * Used for reflink a non-preserve-security file. | |
7171 | * | |
7172 | * It uses common api like ocfs2_xattr_set, so the caller | |
7173 | * must not hold any lock expect i_mutex. | |
7174 | */ | |
7175 | int ocfs2_init_security_and_acl(struct inode *dir, | |
7176 | struct inode *inode) | |
7177 | { | |
7178 | int ret = 0; | |
7179 | struct buffer_head *dir_bh = NULL; | |
7180 | struct ocfs2_security_xattr_info si = { | |
7181 | .enable = 1, | |
7182 | }; | |
7183 | ||
7184 | ret = ocfs2_init_security_get(inode, dir, &si); | |
7185 | if (!ret) { | |
431547b3 CH |
7186 | ret = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, |
7187 | si.name, si.value, si.value_len, | |
7188 | XATTR_CREATE); | |
0fe9b66c TM |
7189 | if (ret) { |
7190 | mlog_errno(ret); | |
7191 | goto leave; | |
7192 | } | |
7193 | } else if (ret != -EOPNOTSUPP) { | |
7194 | mlog_errno(ret); | |
7195 | goto leave; | |
7196 | } | |
7197 | ||
7198 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
7199 | if (ret) { | |
7200 | mlog_errno(ret); | |
7201 | goto leave; | |
7202 | } | |
7203 | ||
7204 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); | |
7205 | if (ret) | |
7206 | mlog_errno(ret); | |
7207 | ||
7208 | ocfs2_inode_unlock(dir, 0); | |
7209 | brelse(dir_bh); | |
7210 | leave: | |
7211 | return ret; | |
7212 | } | |
923f7f31 TY |
7213 | /* |
7214 | * 'security' attributes support | |
7215 | */ | |
431547b3 | 7216 | static size_t ocfs2_xattr_security_list(struct dentry *dentry, char *list, |
923f7f31 | 7217 | size_t list_size, const char *name, |
431547b3 | 7218 | size_t name_len, int type) |
923f7f31 TY |
7219 | { |
7220 | const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; | |
7221 | const size_t total_len = prefix_len + name_len + 1; | |
7222 | ||
7223 | if (list && total_len <= list_size) { | |
7224 | memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); | |
7225 | memcpy(list + prefix_len, name, name_len); | |
7226 | list[prefix_len + name_len] = '\0'; | |
7227 | } | |
7228 | return total_len; | |
7229 | } | |
7230 | ||
431547b3 CH |
7231 | static int ocfs2_xattr_security_get(struct dentry *dentry, const char *name, |
7232 | void *buffer, size_t size, int type) | |
923f7f31 TY |
7233 | { |
7234 | if (strcmp(name, "") == 0) | |
7235 | return -EINVAL; | |
431547b3 CH |
7236 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
7237 | name, buffer, size); | |
923f7f31 TY |
7238 | } |
7239 | ||
431547b3 CH |
7240 | static int ocfs2_xattr_security_set(struct dentry *dentry, const char *name, |
7241 | const void *value, size_t size, int flags, int type) | |
923f7f31 TY |
7242 | { |
7243 | if (strcmp(name, "") == 0) | |
7244 | return -EINVAL; | |
7245 | ||
431547b3 CH |
7246 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_SECURITY, |
7247 | name, value, size, flags); | |
923f7f31 TY |
7248 | } |
7249 | ||
534eaddd TY |
7250 | int ocfs2_init_security_get(struct inode *inode, |
7251 | struct inode *dir, | |
7252 | struct ocfs2_security_xattr_info *si) | |
7253 | { | |
38d59ef6 TY |
7254 | /* check whether ocfs2 support feature xattr */ |
7255 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7256 | return -EOPNOTSUPP; | |
534eaddd TY |
7257 | return security_inode_init_security(inode, dir, &si->name, &si->value, |
7258 | &si->value_len); | |
7259 | } | |
7260 | ||
7261 | int ocfs2_init_security_set(handle_t *handle, | |
7262 | struct inode *inode, | |
7263 | struct buffer_head *di_bh, | |
7264 | struct ocfs2_security_xattr_info *si, | |
7265 | struct ocfs2_alloc_context *xattr_ac, | |
7266 | struct ocfs2_alloc_context *data_ac) | |
7267 | { | |
7268 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7269 | OCFS2_XATTR_INDEX_SECURITY, | |
7270 | si->name, si->value, si->value_len, 0, | |
7271 | xattr_ac, data_ac); | |
7272 | } | |
7273 | ||
923f7f31 TY |
7274 | struct xattr_handler ocfs2_xattr_security_handler = { |
7275 | .prefix = XATTR_SECURITY_PREFIX, | |
7276 | .list = ocfs2_xattr_security_list, | |
7277 | .get = ocfs2_xattr_security_get, | |
7278 | .set = ocfs2_xattr_security_set, | |
7279 | }; | |
7280 | ||
99219aea MF |
7281 | /* |
7282 | * 'trusted' attributes support | |
7283 | */ | |
431547b3 | 7284 | static size_t ocfs2_xattr_trusted_list(struct dentry *dentry, char *list, |
99219aea | 7285 | size_t list_size, const char *name, |
431547b3 | 7286 | size_t name_len, int type) |
99219aea | 7287 | { |
ceb1eba3 | 7288 | const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; |
99219aea MF |
7289 | const size_t total_len = prefix_len + name_len + 1; |
7290 | ||
7291 | if (list && total_len <= list_size) { | |
7292 | memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
7293 | memcpy(list + prefix_len, name, name_len); | |
7294 | list[prefix_len + name_len] = '\0'; | |
7295 | } | |
7296 | return total_len; | |
7297 | } | |
7298 | ||
431547b3 CH |
7299 | static int ocfs2_xattr_trusted_get(struct dentry *dentry, const char *name, |
7300 | void *buffer, size_t size, int type) | |
99219aea MF |
7301 | { |
7302 | if (strcmp(name, "") == 0) | |
7303 | return -EINVAL; | |
431547b3 CH |
7304 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
7305 | name, buffer, size); | |
99219aea MF |
7306 | } |
7307 | ||
431547b3 CH |
7308 | static int ocfs2_xattr_trusted_set(struct dentry *dentry, const char *name, |
7309 | const void *value, size_t size, int flags, int type) | |
99219aea MF |
7310 | { |
7311 | if (strcmp(name, "") == 0) | |
7312 | return -EINVAL; | |
7313 | ||
431547b3 CH |
7314 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_TRUSTED, |
7315 | name, value, size, flags); | |
99219aea MF |
7316 | } |
7317 | ||
7318 | struct xattr_handler ocfs2_xattr_trusted_handler = { | |
7319 | .prefix = XATTR_TRUSTED_PREFIX, | |
7320 | .list = ocfs2_xattr_trusted_list, | |
7321 | .get = ocfs2_xattr_trusted_get, | |
7322 | .set = ocfs2_xattr_trusted_set, | |
7323 | }; | |
7324 | ||
99219aea MF |
7325 | /* |
7326 | * 'user' attributes support | |
7327 | */ | |
431547b3 | 7328 | static size_t ocfs2_xattr_user_list(struct dentry *dentry, char *list, |
99219aea | 7329 | size_t list_size, const char *name, |
431547b3 | 7330 | size_t name_len, int type) |
99219aea | 7331 | { |
ceb1eba3 | 7332 | const size_t prefix_len = XATTR_USER_PREFIX_LEN; |
99219aea | 7333 | const size_t total_len = prefix_len + name_len + 1; |
431547b3 | 7334 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7335 | |
7336 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7337 | return 0; | |
7338 | ||
7339 | if (list && total_len <= list_size) { | |
7340 | memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
7341 | memcpy(list + prefix_len, name, name_len); | |
7342 | list[prefix_len + name_len] = '\0'; | |
7343 | } | |
7344 | return total_len; | |
7345 | } | |
7346 | ||
431547b3 CH |
7347 | static int ocfs2_xattr_user_get(struct dentry *dentry, const char *name, |
7348 | void *buffer, size_t size, int type) | |
99219aea | 7349 | { |
431547b3 | 7350 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7351 | |
7352 | if (strcmp(name, "") == 0) | |
7353 | return -EINVAL; | |
7354 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7355 | return -EOPNOTSUPP; | |
431547b3 | 7356 | return ocfs2_xattr_get(dentry->d_inode, OCFS2_XATTR_INDEX_USER, name, |
99219aea MF |
7357 | buffer, size); |
7358 | } | |
7359 | ||
431547b3 CH |
7360 | static int ocfs2_xattr_user_set(struct dentry *dentry, const char *name, |
7361 | const void *value, size_t size, int flags, int type) | |
99219aea | 7362 | { |
431547b3 | 7363 | struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb); |
99219aea MF |
7364 | |
7365 | if (strcmp(name, "") == 0) | |
7366 | return -EINVAL; | |
7367 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
7368 | return -EOPNOTSUPP; | |
7369 | ||
431547b3 CH |
7370 | return ocfs2_xattr_set(dentry->d_inode, OCFS2_XATTR_INDEX_USER, |
7371 | name, value, size, flags); | |
99219aea MF |
7372 | } |
7373 | ||
7374 | struct xattr_handler ocfs2_xattr_user_handler = { | |
7375 | .prefix = XATTR_USER_PREFIX, | |
7376 | .list = ocfs2_xattr_user_list, | |
7377 | .get = ocfs2_xattr_user_get, | |
7378 | .set = ocfs2_xattr_user_set, | |
7379 | }; |