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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 | #include <cluster/masklog.h> |
41 | ||
42 | #include "ocfs2.h" | |
43 | #include "alloc.h" | |
d6b32bbb | 44 | #include "blockcheck.h" |
f56654c4 TM |
45 | #include "dlmglue.h" |
46 | #include "file.h" | |
cf1d6c76 TY |
47 | #include "symlink.h" |
48 | #include "sysfile.h" | |
f56654c4 TM |
49 | #include "inode.h" |
50 | #include "journal.h" | |
51 | #include "ocfs2_fs.h" | |
52 | #include "suballoc.h" | |
53 | #include "uptodate.h" | |
54 | #include "buffer_head_io.h" | |
0c044f0b | 55 | #include "super.h" |
cf1d6c76 | 56 | #include "xattr.h" |
492a8a33 | 57 | #include "refcounttree.h" |
0fe9b66c | 58 | #include "acl.h" |
402b4183 | 59 | #include "ocfs2_trace.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; | |
5f5261ac | 82 | int set_abort; |
78f30c31 TM |
83 | }; |
84 | ||
cf1d6c76 TY |
85 | #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
86 | #define OCFS2_XATTR_INLINE_SIZE 80 | |
4442f518 | 87 | #define OCFS2_XATTR_HEADER_GAP 4 |
534eaddd TY |
88 | #define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ |
89 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 90 | - OCFS2_XATTR_HEADER_GAP) |
89c38bd0 TY |
91 | #define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ |
92 | - sizeof(struct ocfs2_xattr_block) \ | |
93 | - sizeof(struct ocfs2_xattr_header) \ | |
4442f518 | 94 | - OCFS2_XATTR_HEADER_GAP) |
cf1d6c76 TY |
95 | |
96 | static struct ocfs2_xattr_def_value_root def_xv = { | |
97 | .xv.xr_list.l_count = cpu_to_le16(1), | |
98 | }; | |
99 | ||
537d81ca | 100 | const struct xattr_handler *ocfs2_xattr_handlers[] = { |
cf1d6c76 | 101 | &ocfs2_xattr_user_handler, |
702e5bc6 CH |
102 | &posix_acl_access_xattr_handler, |
103 | &posix_acl_default_xattr_handler, | |
cf1d6c76 | 104 | &ocfs2_xattr_trusted_handler, |
923f7f31 | 105 | &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
106 | NULL |
107 | }; | |
108 | ||
537d81ca | 109 | static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { |
cf1d6c76 | 110 | [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
929fb014 | 111 | [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] |
702e5bc6 | 112 | = &posix_acl_access_xattr_handler, |
929fb014 | 113 | [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] |
702e5bc6 | 114 | = &posix_acl_default_xattr_handler, |
cf1d6c76 | 115 | [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
923f7f31 | 116 | [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, |
cf1d6c76 TY |
117 | }; |
118 | ||
119 | struct ocfs2_xattr_info { | |
6b240ff6 JB |
120 | int xi_name_index; |
121 | const char *xi_name; | |
18853b95 | 122 | int xi_name_len; |
6b240ff6 JB |
123 | const void *xi_value; |
124 | size_t xi_value_len; | |
cf1d6c76 TY |
125 | }; |
126 | ||
127 | struct ocfs2_xattr_search { | |
128 | struct buffer_head *inode_bh; | |
129 | /* | |
130 | * xattr_bh point to the block buffer head which has extended attribute | |
131 | * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
132 | */ | |
133 | struct buffer_head *xattr_bh; | |
134 | struct ocfs2_xattr_header *header; | |
ba937127 | 135 | struct ocfs2_xattr_bucket *bucket; |
cf1d6c76 TY |
136 | void *base; |
137 | void *end; | |
138 | struct ocfs2_xattr_entry *here; | |
139 | int not_found; | |
140 | }; | |
141 | ||
11179f2c JB |
142 | /* Operations on struct ocfs2_xa_entry */ |
143 | struct ocfs2_xa_loc; | |
144 | struct ocfs2_xa_loc_operations { | |
cf2bc809 JB |
145 | /* |
146 | * Journal functions | |
147 | */ | |
148 | int (*xlo_journal_access)(handle_t *handle, struct ocfs2_xa_loc *loc, | |
149 | int type); | |
150 | void (*xlo_journal_dirty)(handle_t *handle, struct ocfs2_xa_loc *loc); | |
151 | ||
11179f2c JB |
152 | /* |
153 | * Return a pointer to the appropriate buffer in loc->xl_storage | |
154 | * at the given offset from loc->xl_header. | |
155 | */ | |
156 | void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset); | |
157 | ||
69a3e539 JB |
158 | /* Can we reuse the existing entry for the new value? */ |
159 | int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc, | |
160 | struct ocfs2_xattr_info *xi); | |
161 | ||
162 | /* How much space is needed for the new value? */ | |
163 | int (*xlo_check_space)(struct ocfs2_xa_loc *loc, | |
164 | struct ocfs2_xattr_info *xi); | |
165 | ||
166 | /* | |
167 | * Return the offset of the first name+value pair. This is | |
168 | * the start of our downward-filling free space. | |
169 | */ | |
170 | int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc); | |
171 | ||
11179f2c JB |
172 | /* |
173 | * Remove the name+value at this location. Do whatever is | |
174 | * appropriate with the remaining name+value pairs. | |
175 | */ | |
176 | void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc); | |
69a3e539 JB |
177 | |
178 | /* Fill xl_entry with a new entry */ | |
179 | void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash); | |
180 | ||
181 | /* Add name+value storage to an entry */ | |
182 | void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size); | |
3fc12afa JB |
183 | |
184 | /* | |
185 | * Initialize the value buf's access and bh fields for this entry. | |
186 | * ocfs2_xa_fill_value_buf() will handle the xv pointer. | |
187 | */ | |
188 | void (*xlo_fill_value_buf)(struct ocfs2_xa_loc *loc, | |
189 | struct ocfs2_xattr_value_buf *vb); | |
11179f2c JB |
190 | }; |
191 | ||
192 | /* | |
193 | * Describes an xattr entry location. This is a memory structure | |
194 | * tracking the on-disk structure. | |
195 | */ | |
196 | struct ocfs2_xa_loc { | |
cf2bc809 JB |
197 | /* This xattr belongs to this inode */ |
198 | struct inode *xl_inode; | |
199 | ||
11179f2c JB |
200 | /* The ocfs2_xattr_header inside the on-disk storage. Not NULL. */ |
201 | struct ocfs2_xattr_header *xl_header; | |
202 | ||
203 | /* Bytes from xl_header to the end of the storage */ | |
204 | int xl_size; | |
205 | ||
206 | /* | |
207 | * The ocfs2_xattr_entry this location describes. If this is | |
208 | * NULL, this location describes the on-disk structure where it | |
209 | * would have been. | |
210 | */ | |
211 | struct ocfs2_xattr_entry *xl_entry; | |
212 | ||
213 | /* | |
214 | * Internal housekeeping | |
215 | */ | |
216 | ||
217 | /* Buffer(s) containing this entry */ | |
218 | void *xl_storage; | |
219 | ||
220 | /* Operations on the storage backing this location */ | |
221 | const struct ocfs2_xa_loc_operations *xl_ops; | |
222 | }; | |
223 | ||
199799a3 JB |
224 | /* |
225 | * Convenience functions to calculate how much space is needed for a | |
226 | * given name+value pair | |
227 | */ | |
228 | static int namevalue_size(int name_len, uint64_t value_len) | |
229 | { | |
230 | if (value_len > OCFS2_XATTR_INLINE_SIZE) | |
231 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
232 | else | |
233 | return OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); | |
234 | } | |
235 | ||
236 | static int namevalue_size_xi(struct ocfs2_xattr_info *xi) | |
237 | { | |
238 | return namevalue_size(xi->xi_name_len, xi->xi_value_len); | |
239 | } | |
240 | ||
241 | static int namevalue_size_xe(struct ocfs2_xattr_entry *xe) | |
242 | { | |
243 | u64 value_len = le64_to_cpu(xe->xe_value_size); | |
244 | ||
245 | BUG_ON((value_len > OCFS2_XATTR_INLINE_SIZE) && | |
246 | ocfs2_xattr_is_local(xe)); | |
247 | return namevalue_size(xe->xe_name_len, value_len); | |
248 | } | |
249 | ||
250 | ||
fd68a894 | 251 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
589dc260 TM |
252 | struct ocfs2_xattr_header *xh, |
253 | int index, | |
254 | int *block_off, | |
255 | int *new_offset); | |
256 | ||
54f443f4 JB |
257 | static int ocfs2_xattr_block_find(struct inode *inode, |
258 | int name_index, | |
259 | const char *name, | |
260 | struct ocfs2_xattr_search *xs); | |
589dc260 TM |
261 | static int ocfs2_xattr_index_block_find(struct inode *inode, |
262 | struct buffer_head *root_bh, | |
263 | int name_index, | |
264 | const char *name, | |
265 | struct ocfs2_xattr_search *xs); | |
266 | ||
0c044f0b | 267 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
47bca495 | 268 | struct buffer_head *blk_bh, |
0c044f0b TM |
269 | char *buffer, |
270 | size_t buffer_size); | |
271 | ||
01225596 | 272 | static int ocfs2_xattr_create_index_block(struct inode *inode, |
78f30c31 TM |
273 | struct ocfs2_xattr_search *xs, |
274 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 TM |
275 | |
276 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, | |
277 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
278 | struct ocfs2_xattr_search *xs, |
279 | struct ocfs2_xattr_set_ctxt *ctxt); | |
01225596 | 280 | |
47bca495 TM |
281 | typedef int (xattr_tree_rec_func)(struct inode *inode, |
282 | struct buffer_head *root_bh, | |
283 | u64 blkno, u32 cpos, u32 len, void *para); | |
284 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, | |
285 | struct buffer_head *root_bh, | |
286 | xattr_tree_rec_func *rec_func, | |
287 | void *para); | |
288 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
289 | struct ocfs2_xattr_bucket *bucket, | |
290 | void *para); | |
291 | static int ocfs2_rm_xattr_cluster(struct inode *inode, | |
292 | struct buffer_head *root_bh, | |
293 | u64 blkno, | |
294 | u32 cpos, | |
295 | u32 len, | |
296 | void *para); | |
297 | ||
c58b6032 JB |
298 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
299 | u64 src_blk, u64 last_blk, u64 to_blk, | |
300 | unsigned int start_bucket, | |
301 | u32 *first_hash); | |
492a8a33 TM |
302 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, |
303 | struct ocfs2_dinode *di, | |
304 | struct ocfs2_xattr_info *xi, | |
305 | struct ocfs2_xattr_search *xis, | |
306 | struct ocfs2_xattr_search *xbs, | |
307 | struct ocfs2_refcount_tree **ref_tree, | |
308 | int *meta_need, | |
309 | int *credits); | |
ce9c5a54 TM |
310 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, |
311 | struct ocfs2_xattr_bucket *bucket, | |
312 | int offset, | |
313 | struct ocfs2_xattr_value_root **xv, | |
314 | struct buffer_head **bh); | |
a3944256 | 315 | |
0030e001 TY |
316 | static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) |
317 | { | |
318 | return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; | |
319 | } | |
320 | ||
321 | static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) | |
322 | { | |
323 | return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); | |
324 | } | |
325 | ||
9c7759aa | 326 | #define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) |
51def39f | 327 | #define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) |
3e632946 | 328 | #define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) |
9c7759aa | 329 | |
ba937127 | 330 | static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) |
6dde41d9 | 331 | { |
ba937127 JB |
332 | struct ocfs2_xattr_bucket *bucket; |
333 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
6dde41d9 | 334 | |
ba937127 JB |
335 | BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); |
336 | ||
337 | bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); | |
338 | if (bucket) { | |
339 | bucket->bu_inode = inode; | |
340 | bucket->bu_blocks = blks; | |
341 | } | |
342 | ||
343 | return bucket; | |
344 | } | |
345 | ||
346 | static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) | |
347 | { | |
348 | int i; | |
349 | ||
350 | for (i = 0; i < bucket->bu_blocks; i++) { | |
6dde41d9 JB |
351 | brelse(bucket->bu_bhs[i]); |
352 | bucket->bu_bhs[i] = NULL; | |
353 | } | |
354 | } | |
355 | ||
ba937127 JB |
356 | static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) |
357 | { | |
358 | if (bucket) { | |
359 | ocfs2_xattr_bucket_relse(bucket); | |
360 | bucket->bu_inode = NULL; | |
361 | kfree(bucket); | |
362 | } | |
363 | } | |
364 | ||
784b816a JB |
365 | /* |
366 | * A bucket that has never been written to disk doesn't need to be | |
367 | * read. We just need the buffer_heads. Don't call this for | |
368 | * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes | |
369 | * them fully. | |
370 | */ | |
ba937127 | 371 | static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
9c339255 | 372 | u64 xb_blkno, int new) |
784b816a JB |
373 | { |
374 | int i, rc = 0; | |
784b816a | 375 | |
ba937127 JB |
376 | for (i = 0; i < bucket->bu_blocks; i++) { |
377 | bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, | |
378 | xb_blkno + i); | |
784b816a | 379 | if (!bucket->bu_bhs[i]) { |
7391a294 | 380 | rc = -ENOMEM; |
784b816a JB |
381 | mlog_errno(rc); |
382 | break; | |
383 | } | |
384 | ||
8cb471e8 | 385 | if (!ocfs2_buffer_uptodate(INODE_CACHE(bucket->bu_inode), |
9c339255 WW |
386 | bucket->bu_bhs[i])) { |
387 | if (new) | |
388 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(bucket->bu_inode), | |
389 | bucket->bu_bhs[i]); | |
390 | else { | |
391 | set_buffer_uptodate(bucket->bu_bhs[i]); | |
392 | ocfs2_set_buffer_uptodate(INODE_CACHE(bucket->bu_inode), | |
393 | bucket->bu_bhs[i]); | |
394 | } | |
395 | } | |
784b816a JB |
396 | } |
397 | ||
398 | if (rc) | |
ba937127 | 399 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
400 | return rc; |
401 | } | |
402 | ||
403 | /* Read the xattr bucket at xb_blkno */ | |
ba937127 | 404 | static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, |
784b816a JB |
405 | u64 xb_blkno) |
406 | { | |
ba937127 | 407 | int rc; |
784b816a | 408 | |
8cb471e8 | 409 | rc = ocfs2_read_blocks(INODE_CACHE(bucket->bu_inode), xb_blkno, |
970e4936 JB |
410 | bucket->bu_blocks, bucket->bu_bhs, 0, |
411 | NULL); | |
4d0e214e | 412 | if (!rc) { |
c8b9cf9a | 413 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
414 | rc = ocfs2_validate_meta_ecc_bhs(bucket->bu_inode->i_sb, |
415 | bucket->bu_bhs, | |
416 | bucket->bu_blocks, | |
417 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 418 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
419 | if (rc) |
420 | mlog_errno(rc); | |
421 | } | |
422 | ||
784b816a | 423 | if (rc) |
ba937127 | 424 | ocfs2_xattr_bucket_relse(bucket); |
784b816a JB |
425 | return rc; |
426 | } | |
427 | ||
1224be02 | 428 | static int ocfs2_xattr_bucket_journal_access(handle_t *handle, |
1224be02 JB |
429 | struct ocfs2_xattr_bucket *bucket, |
430 | int type) | |
431 | { | |
432 | int i, rc = 0; | |
1224be02 | 433 | |
ba937127 | 434 | for (i = 0; i < bucket->bu_blocks; i++) { |
0cf2f763 JB |
435 | rc = ocfs2_journal_access(handle, |
436 | INODE_CACHE(bucket->bu_inode), | |
1224be02 JB |
437 | bucket->bu_bhs[i], type); |
438 | if (rc) { | |
439 | mlog_errno(rc); | |
440 | break; | |
441 | } | |
442 | } | |
443 | ||
444 | return rc; | |
445 | } | |
446 | ||
447 | static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, | |
1224be02 JB |
448 | struct ocfs2_xattr_bucket *bucket) |
449 | { | |
ba937127 | 450 | int i; |
1224be02 | 451 | |
c8b9cf9a | 452 | spin_lock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e JB |
453 | ocfs2_compute_meta_ecc_bhs(bucket->bu_inode->i_sb, |
454 | bucket->bu_bhs, bucket->bu_blocks, | |
455 | &bucket_xh(bucket)->xh_check); | |
c8b9cf9a | 456 | spin_unlock(&OCFS2_SB(bucket->bu_inode->i_sb)->osb_xattr_lock); |
4d0e214e | 457 | |
ba937127 | 458 | for (i = 0; i < bucket->bu_blocks; i++) |
1224be02 JB |
459 | ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); |
460 | } | |
461 | ||
ba937127 | 462 | static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, |
4980c6da JB |
463 | struct ocfs2_xattr_bucket *src) |
464 | { | |
465 | int i; | |
ba937127 JB |
466 | int blocksize = src->bu_inode->i_sb->s_blocksize; |
467 | ||
468 | BUG_ON(dest->bu_blocks != src->bu_blocks); | |
469 | BUG_ON(dest->bu_inode != src->bu_inode); | |
4980c6da | 470 | |
ba937127 | 471 | for (i = 0; i < src->bu_blocks; i++) { |
4980c6da JB |
472 | memcpy(bucket_block(dest, i), bucket_block(src, i), |
473 | blocksize); | |
474 | } | |
475 | } | |
1224be02 | 476 | |
4ae1d69b JB |
477 | static int ocfs2_validate_xattr_block(struct super_block *sb, |
478 | struct buffer_head *bh) | |
479 | { | |
d6b32bbb | 480 | int rc; |
4ae1d69b JB |
481 | struct ocfs2_xattr_block *xb = |
482 | (struct ocfs2_xattr_block *)bh->b_data; | |
483 | ||
402b4183 | 484 | trace_ocfs2_validate_xattr_block((unsigned long long)bh->b_blocknr); |
4ae1d69b | 485 | |
d6b32bbb JB |
486 | BUG_ON(!buffer_uptodate(bh)); |
487 | ||
488 | /* | |
489 | * If the ecc fails, we return the error but otherwise | |
490 | * leave the filesystem running. We know any error is | |
491 | * local to this block. | |
492 | */ | |
493 | rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &xb->xb_check); | |
494 | if (rc) | |
495 | return rc; | |
496 | ||
497 | /* | |
498 | * Errors after here are fatal | |
499 | */ | |
500 | ||
4ae1d69b | 501 | if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { |
17a5b9ab | 502 | return ocfs2_error(sb, |
7ecef14a JP |
503 | "Extended attribute block #%llu has bad signature %.*s\n", |
504 | (unsigned long long)bh->b_blocknr, 7, | |
505 | xb->xb_signature); | |
4ae1d69b JB |
506 | } |
507 | ||
508 | if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { | |
17a5b9ab | 509 | return ocfs2_error(sb, |
7ecef14a JP |
510 | "Extended attribute block #%llu has an invalid xb_blkno of %llu\n", |
511 | (unsigned long long)bh->b_blocknr, | |
512 | (unsigned long long)le64_to_cpu(xb->xb_blkno)); | |
4ae1d69b JB |
513 | } |
514 | ||
515 | if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { | |
17a5b9ab | 516 | return ocfs2_error(sb, |
7ecef14a JP |
517 | "Extended attribute block #%llu has an invalid xb_fs_generation of #%u\n", |
518 | (unsigned long long)bh->b_blocknr, | |
519 | le32_to_cpu(xb->xb_fs_generation)); | |
4ae1d69b JB |
520 | } |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, | |
526 | struct buffer_head **bh) | |
527 | { | |
528 | int rc; | |
529 | struct buffer_head *tmp = *bh; | |
530 | ||
8cb471e8 | 531 | rc = ocfs2_read_block(INODE_CACHE(inode), xb_blkno, &tmp, |
970e4936 | 532 | ocfs2_validate_xattr_block); |
4ae1d69b JB |
533 | |
534 | /* If ocfs2_read_block() got us a new bh, pass it up. */ | |
535 | if (!rc && !*bh) | |
536 | *bh = tmp; | |
537 | ||
538 | return rc; | |
539 | } | |
540 | ||
936b8834 | 541 | static inline const char *ocfs2_xattr_prefix(int name_index) |
cf1d6c76 | 542 | { |
537d81ca | 543 | const struct xattr_handler *handler = NULL; |
cf1d6c76 TY |
544 | |
545 | if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
546 | handler = ocfs2_xattr_handler_map[name_index]; | |
98e9cb57 | 547 | return handler ? xattr_prefix(handler) : NULL; |
cf1d6c76 TY |
548 | } |
549 | ||
40daa16a | 550 | static u32 ocfs2_xattr_name_hash(struct inode *inode, |
2057e5c6 | 551 | const char *name, |
40daa16a | 552 | int name_len) |
cf1d6c76 TY |
553 | { |
554 | /* Get hash value of uuid from super block */ | |
555 | u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
556 | int i; | |
557 | ||
cf1d6c76 TY |
558 | /* hash extended attribute name */ |
559 | for (i = 0; i < name_len; i++) { | |
560 | hash = (hash << OCFS2_HASH_SHIFT) ^ | |
561 | (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
562 | *name++; | |
563 | } | |
564 | ||
565 | return hash; | |
566 | } | |
567 | ||
534eaddd TY |
568 | static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) |
569 | { | |
199799a3 JB |
570 | return namevalue_size(name_len, value_len) + |
571 | sizeof(struct ocfs2_xattr_entry); | |
572 | } | |
534eaddd | 573 | |
199799a3 JB |
574 | static int ocfs2_xi_entry_usage(struct ocfs2_xattr_info *xi) |
575 | { | |
576 | return namevalue_size_xi(xi) + | |
577 | sizeof(struct ocfs2_xattr_entry); | |
578 | } | |
534eaddd | 579 | |
199799a3 JB |
580 | static int ocfs2_xe_entry_usage(struct ocfs2_xattr_entry *xe) |
581 | { | |
582 | return namevalue_size_xe(xe) + | |
583 | sizeof(struct ocfs2_xattr_entry); | |
534eaddd TY |
584 | } |
585 | ||
586 | int ocfs2_calc_security_init(struct inode *dir, | |
587 | struct ocfs2_security_xattr_info *si, | |
588 | int *want_clusters, | |
589 | int *xattr_credits, | |
590 | struct ocfs2_alloc_context **xattr_ac) | |
591 | { | |
592 | int ret = 0; | |
593 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
594 | int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
595 | si->value_len); | |
596 | ||
597 | /* | |
598 | * The max space of security xattr taken inline is | |
599 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
600 | * So reserve one metadata block for it is ok. | |
601 | */ | |
602 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
603 | s_size > OCFS2_XATTR_FREE_IN_IBODY) { | |
604 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); | |
605 | if (ret) { | |
606 | mlog_errno(ret); | |
607 | return ret; | |
608 | } | |
609 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; | |
610 | } | |
611 | ||
612 | /* reserve clusters for xattr value which will be set in B tree*/ | |
0e445b6f TY |
613 | if (si->value_len > OCFS2_XATTR_INLINE_SIZE) { |
614 | int new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
615 | si->value_len); | |
616 | ||
617 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
618 | new_clusters); | |
619 | *want_clusters += new_clusters; | |
620 | } | |
534eaddd TY |
621 | return ret; |
622 | } | |
623 | ||
89c38bd0 TY |
624 | int ocfs2_calc_xattr_init(struct inode *dir, |
625 | struct buffer_head *dir_bh, | |
67697cbd | 626 | umode_t mode, |
89c38bd0 TY |
627 | struct ocfs2_security_xattr_info *si, |
628 | int *want_clusters, | |
629 | int *xattr_credits, | |
9b7895ef | 630 | int *want_meta) |
89c38bd0 TY |
631 | { |
632 | int ret = 0; | |
633 | struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); | |
0e445b6f | 634 | int s_size = 0, a_size = 0, acl_len = 0, new_clusters; |
89c38bd0 TY |
635 | |
636 | if (si->enable) | |
637 | s_size = ocfs2_xattr_entry_real_size(strlen(si->name), | |
638 | si->value_len); | |
639 | ||
640 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { | |
16c8d569 | 641 | down_read(&OCFS2_I(dir)->ip_xattr_sem); |
89c38bd0 TY |
642 | acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, |
643 | OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
644 | "", NULL, 0); | |
16c8d569 | 645 | up_read(&OCFS2_I(dir)->ip_xattr_sem); |
89c38bd0 TY |
646 | if (acl_len > 0) { |
647 | a_size = ocfs2_xattr_entry_real_size(0, acl_len); | |
648 | if (S_ISDIR(mode)) | |
649 | a_size <<= 1; | |
650 | } else if (acl_len != 0 && acl_len != -ENODATA) { | |
c0a1a6d7 | 651 | ret = acl_len; |
89c38bd0 TY |
652 | mlog_errno(ret); |
653 | return ret; | |
654 | } | |
655 | } | |
656 | ||
657 | if (!(s_size + a_size)) | |
658 | return ret; | |
659 | ||
660 | /* | |
661 | * The max space of security xattr taken inline is | |
662 | * 256(name) + 80(value) + 16(entry) = 352 bytes, | |
663 | * The max space of acl xattr taken inline is | |
664 | * 80(value) + 16(entry) * 2(if directory) = 192 bytes, | |
665 | * when blocksize = 512, may reserve one more cluser for | |
666 | * xattr bucket, otherwise reserve one metadata block | |
667 | * for them is ok. | |
6c9fd1dc TY |
668 | * If this is a new directory with inline data, |
669 | * we choose to reserve the entire inline area for | |
670 | * directory contents and force an external xattr block. | |
89c38bd0 TY |
671 | */ |
672 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || | |
6c9fd1dc | 673 | (S_ISDIR(mode) && ocfs2_supports_inline_data(osb)) || |
89c38bd0 | 674 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { |
9b7895ef | 675 | *want_meta = *want_meta + 1; |
89c38bd0 TY |
676 | *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
677 | } | |
678 | ||
679 | if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && | |
680 | (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { | |
681 | *want_clusters += 1; | |
682 | *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); | |
683 | } | |
684 | ||
0e445b6f TY |
685 | /* |
686 | * reserve credits and clusters for xattrs which has large value | |
687 | * and have to be set outside | |
688 | */ | |
689 | if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
690 | new_clusters = ocfs2_clusters_for_bytes(dir->i_sb, | |
691 | si->value_len); | |
692 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
693 | new_clusters); | |
694 | *want_clusters += new_clusters; | |
695 | } | |
89c38bd0 TY |
696 | if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && |
697 | acl_len > OCFS2_XATTR_INLINE_SIZE) { | |
0e445b6f TY |
698 | /* for directory, it has DEFAULT and ACCESS two types of acls */ |
699 | new_clusters = (S_ISDIR(mode) ? 2 : 1) * | |
700 | ocfs2_clusters_for_bytes(dir->i_sb, acl_len); | |
701 | *xattr_credits += ocfs2_clusters_to_blocks(dir->i_sb, | |
702 | new_clusters); | |
703 | *want_clusters += new_clusters; | |
89c38bd0 TY |
704 | } |
705 | ||
706 | return ret; | |
707 | } | |
708 | ||
f56654c4 TM |
709 | static int ocfs2_xattr_extend_allocation(struct inode *inode, |
710 | u32 clusters_to_add, | |
19b801f4 | 711 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 712 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 | 713 | { |
a78f9f46 | 714 | int status = 0, credits; |
85db90e7 | 715 | handle_t *handle = ctxt->handle; |
f56654c4 | 716 | enum ocfs2_alloc_restarted why; |
19b801f4 | 717 | u32 prev_clusters, logical_start = le32_to_cpu(vb->vb_xv->xr_clusters); |
f99b9b7c | 718 | struct ocfs2_extent_tree et; |
f56654c4 | 719 | |
5e404e9e | 720 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f99b9b7c | 721 | |
a78f9f46 | 722 | while (clusters_to_add) { |
402b4183 TM |
723 | trace_ocfs2_xattr_extend_allocation(clusters_to_add); |
724 | ||
a78f9f46 TM |
725 | status = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
726 | OCFS2_JOURNAL_ACCESS_WRITE); | |
727 | if (status < 0) { | |
728 | mlog_errno(status); | |
729 | break; | |
730 | } | |
f56654c4 | 731 | |
a78f9f46 TM |
732 | prev_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
733 | status = ocfs2_add_clusters_in_btree(handle, | |
734 | &et, | |
735 | &logical_start, | |
736 | clusters_to_add, | |
737 | 0, | |
738 | ctxt->data_ac, | |
739 | ctxt->meta_ac, | |
740 | &why); | |
741 | if ((status < 0) && (status != -EAGAIN)) { | |
742 | if (status != -ENOSPC) | |
743 | mlog_errno(status); | |
744 | break; | |
745 | } | |
f56654c4 | 746 | |
a78f9f46 TM |
747 | ocfs2_journal_dirty(handle, vb->vb_bh); |
748 | ||
749 | clusters_to_add -= le32_to_cpu(vb->vb_xv->xr_clusters) - | |
750 | prev_clusters; | |
751 | ||
752 | if (why != RESTART_NONE && clusters_to_add) { | |
753 | /* | |
754 | * We can only fail in case the alloc file doesn't give | |
755 | * up enough clusters. | |
756 | */ | |
757 | BUG_ON(why == RESTART_META); | |
758 | ||
a78f9f46 | 759 | credits = ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 760 | &vb->vb_xv->xr_list); |
a78f9f46 TM |
761 | status = ocfs2_extend_trans(handle, credits); |
762 | if (status < 0) { | |
763 | status = -ENOMEM; | |
764 | mlog_errno(status); | |
765 | break; | |
766 | } | |
767 | } | |
768 | } | |
f56654c4 TM |
769 | |
770 | return status; | |
771 | } | |
772 | ||
773 | static int __ocfs2_remove_xattr_range(struct inode *inode, | |
d72cc72d | 774 | struct ocfs2_xattr_value_buf *vb, |
f56654c4 | 775 | u32 cpos, u32 phys_cpos, u32 len, |
492a8a33 | 776 | unsigned int ext_flags, |
78f30c31 | 777 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
778 | { |
779 | int ret; | |
780 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
85db90e7 | 781 | handle_t *handle = ctxt->handle; |
f99b9b7c JB |
782 | struct ocfs2_extent_tree et; |
783 | ||
5e404e9e | 784 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); |
f56654c4 | 785 | |
0cf2f763 | 786 | ret = vb->vb_access(handle, INODE_CACHE(inode), vb->vb_bh, |
d72cc72d | 787 | OCFS2_JOURNAL_ACCESS_WRITE); |
f56654c4 TM |
788 | if (ret) { |
789 | mlog_errno(ret); | |
85db90e7 | 790 | goto out; |
f56654c4 TM |
791 | } |
792 | ||
dbdcf6a4 | 793 | ret = ocfs2_remove_extent(handle, &et, cpos, len, ctxt->meta_ac, |
78f30c31 | 794 | &ctxt->dealloc); |
f56654c4 TM |
795 | if (ret) { |
796 | mlog_errno(ret); | |
85db90e7 | 797 | goto out; |
f56654c4 TM |
798 | } |
799 | ||
d72cc72d | 800 | le32_add_cpu(&vb->vb_xv->xr_clusters, -len); |
ec20cec7 | 801 | ocfs2_journal_dirty(handle, vb->vb_bh); |
f56654c4 | 802 | |
492a8a33 TM |
803 | if (ext_flags & OCFS2_EXT_REFCOUNTED) |
804 | ret = ocfs2_decrease_refcount(inode, handle, | |
805 | ocfs2_blocks_to_clusters(inode->i_sb, | |
806 | phys_blkno), | |
807 | len, ctxt->meta_ac, &ctxt->dealloc, 1); | |
808 | else | |
809 | ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, | |
810 | phys_blkno, len); | |
f56654c4 TM |
811 | if (ret) |
812 | mlog_errno(ret); | |
813 | ||
f56654c4 | 814 | out: |
f56654c4 TM |
815 | return ret; |
816 | } | |
817 | ||
818 | static int ocfs2_xattr_shrink_size(struct inode *inode, | |
819 | u32 old_clusters, | |
820 | u32 new_clusters, | |
19b801f4 | 821 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 | 822 | struct ocfs2_xattr_set_ctxt *ctxt) |
f56654c4 TM |
823 | { |
824 | int ret = 0; | |
492a8a33 | 825 | unsigned int ext_flags; |
f56654c4 TM |
826 | u32 trunc_len, cpos, phys_cpos, alloc_size; |
827 | u64 block; | |
f56654c4 TM |
828 | |
829 | if (old_clusters <= new_clusters) | |
830 | return 0; | |
831 | ||
832 | cpos = new_clusters; | |
833 | trunc_len = old_clusters - new_clusters; | |
834 | while (trunc_len) { | |
835 | ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, | |
d72cc72d | 836 | &alloc_size, |
492a8a33 | 837 | &vb->vb_xv->xr_list, &ext_flags); |
f56654c4 TM |
838 | if (ret) { |
839 | mlog_errno(ret); | |
840 | goto out; | |
841 | } | |
842 | ||
843 | if (alloc_size > trunc_len) | |
844 | alloc_size = trunc_len; | |
845 | ||
19b801f4 | 846 | ret = __ocfs2_remove_xattr_range(inode, vb, cpos, |
f56654c4 | 847 | phys_cpos, alloc_size, |
492a8a33 | 848 | ext_flags, ctxt); |
f56654c4 TM |
849 | if (ret) { |
850 | mlog_errno(ret); | |
851 | goto out; | |
852 | } | |
853 | ||
854 | block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
8cb471e8 JB |
855 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), |
856 | block, alloc_size); | |
f56654c4 TM |
857 | cpos += alloc_size; |
858 | trunc_len -= alloc_size; | |
859 | } | |
860 | ||
861 | out: | |
f56654c4 TM |
862 | return ret; |
863 | } | |
864 | ||
865 | static int ocfs2_xattr_value_truncate(struct inode *inode, | |
b3e5d379 | 866 | struct ocfs2_xattr_value_buf *vb, |
78f30c31 TM |
867 | int len, |
868 | struct ocfs2_xattr_set_ctxt *ctxt) | |
f56654c4 TM |
869 | { |
870 | int ret; | |
871 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); | |
b3e5d379 | 872 | u32 old_clusters = le32_to_cpu(vb->vb_xv->xr_clusters); |
f56654c4 TM |
873 | |
874 | if (new_clusters == old_clusters) | |
875 | return 0; | |
876 | ||
877 | if (new_clusters > old_clusters) | |
878 | ret = ocfs2_xattr_extend_allocation(inode, | |
879 | new_clusters - old_clusters, | |
b3e5d379 | 880 | vb, ctxt); |
f56654c4 TM |
881 | else |
882 | ret = ocfs2_xattr_shrink_size(inode, | |
883 | old_clusters, new_clusters, | |
b3e5d379 | 884 | vb, ctxt); |
f56654c4 TM |
885 | |
886 | return ret; | |
887 | } | |
cf1d6c76 | 888 | |
1046cb11 AG |
889 | static int ocfs2_xattr_list_entry(struct super_block *sb, |
890 | char *buffer, size_t size, | |
891 | size_t *result, int type, | |
936b8834 TM |
892 | const char *name, int name_len) |
893 | { | |
894 | char *p = buffer + *result; | |
1046cb11 AG |
895 | const char *prefix; |
896 | int prefix_len; | |
897 | int total_len; | |
936b8834 | 898 | |
1046cb11 AG |
899 | switch(type) { |
900 | case OCFS2_XATTR_INDEX_USER: | |
901 | if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
902 | return 0; | |
903 | break; | |
904 | ||
905 | case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS: | |
906 | case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT: | |
1751e8a6 | 907 | if (!(sb->s_flags & SB_POSIXACL)) |
1046cb11 AG |
908 | return 0; |
909 | break; | |
910 | ||
911 | case OCFS2_XATTR_INDEX_TRUSTED: | |
912 | if (!capable(CAP_SYS_ADMIN)) | |
913 | return 0; | |
914 | break; | |
915 | } | |
916 | ||
917 | prefix = ocfs2_xattr_prefix(type); | |
918 | if (!prefix) | |
919 | return 0; | |
920 | prefix_len = strlen(prefix); | |
921 | total_len = prefix_len + name_len + 1; | |
936b8834 TM |
922 | *result += total_len; |
923 | ||
924 | /* we are just looking for how big our buffer needs to be */ | |
925 | if (!size) | |
926 | return 0; | |
927 | ||
928 | if (*result > size) | |
929 | return -ERANGE; | |
930 | ||
931 | memcpy(p, prefix, prefix_len); | |
932 | memcpy(p + prefix_len, name, name_len); | |
933 | p[prefix_len + name_len] = '\0'; | |
934 | ||
935 | return 0; | |
936 | } | |
937 | ||
cf1d6c76 TY |
938 | static int ocfs2_xattr_list_entries(struct inode *inode, |
939 | struct ocfs2_xattr_header *header, | |
940 | char *buffer, size_t buffer_size) | |
941 | { | |
936b8834 TM |
942 | size_t result = 0; |
943 | int i, type, ret; | |
1046cb11 | 944 | const char *name; |
cf1d6c76 TY |
945 | |
946 | for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
947 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
936b8834 | 948 | type = ocfs2_xattr_get_type(entry); |
1046cb11 AG |
949 | name = (const char *)header + |
950 | le16_to_cpu(entry->xe_name_offset); | |
936b8834 | 951 | |
1046cb11 AG |
952 | ret = ocfs2_xattr_list_entry(inode->i_sb, |
953 | buffer, buffer_size, | |
954 | &result, type, name, | |
955 | entry->xe_name_len); | |
956 | if (ret) | |
957 | return ret; | |
cf1d6c76 TY |
958 | } |
959 | ||
936b8834 | 960 | return result; |
cf1d6c76 TY |
961 | } |
962 | ||
8b2c0dba TM |
963 | int ocfs2_has_inline_xattr_value_outside(struct inode *inode, |
964 | struct ocfs2_dinode *di) | |
965 | { | |
966 | struct ocfs2_xattr_header *xh; | |
967 | int i; | |
968 | ||
969 | xh = (struct ocfs2_xattr_header *) | |
970 | ((void *)di + inode->i_sb->s_blocksize - | |
971 | le16_to_cpu(di->i_xattr_inline_size)); | |
972 | ||
973 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) | |
974 | if (!ocfs2_xattr_is_local(&xh->xh_entries[i])) | |
975 | return 1; | |
976 | ||
977 | return 0; | |
978 | } | |
979 | ||
cf1d6c76 TY |
980 | static int ocfs2_xattr_ibody_list(struct inode *inode, |
981 | struct ocfs2_dinode *di, | |
982 | char *buffer, | |
983 | size_t buffer_size) | |
984 | { | |
985 | struct ocfs2_xattr_header *header = NULL; | |
986 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
987 | int ret = 0; | |
988 | ||
989 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
990 | return ret; | |
991 | ||
992 | header = (struct ocfs2_xattr_header *) | |
993 | ((void *)di + inode->i_sb->s_blocksize - | |
994 | le16_to_cpu(di->i_xattr_inline_size)); | |
995 | ||
996 | ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
997 | ||
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static int ocfs2_xattr_block_list(struct inode *inode, | |
1002 | struct ocfs2_dinode *di, | |
1003 | char *buffer, | |
1004 | size_t buffer_size) | |
1005 | { | |
1006 | struct buffer_head *blk_bh = NULL; | |
0c044f0b | 1007 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
1008 | int ret = 0; |
1009 | ||
1010 | if (!di->i_xattr_loc) | |
1011 | return ret; | |
1012 | ||
4ae1d69b JB |
1013 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
1014 | &blk_bh); | |
cf1d6c76 TY |
1015 | if (ret < 0) { |
1016 | mlog_errno(ret); | |
1017 | return ret; | |
1018 | } | |
cf1d6c76 | 1019 | |
0c044f0b | 1020 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
0c044f0b TM |
1021 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
1022 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
1023 | ret = ocfs2_xattr_list_entries(inode, header, | |
1024 | buffer, buffer_size); | |
47bca495 TM |
1025 | } else |
1026 | ret = ocfs2_xattr_tree_list_index_block(inode, blk_bh, | |
0c044f0b | 1027 | buffer, buffer_size); |
4ae1d69b | 1028 | |
cf1d6c76 TY |
1029 | brelse(blk_bh); |
1030 | ||
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | ssize_t ocfs2_listxattr(struct dentry *dentry, | |
1035 | char *buffer, | |
1036 | size_t size) | |
1037 | { | |
1038 | int ret = 0, i_ret = 0, b_ret = 0; | |
1039 | struct buffer_head *di_bh = NULL; | |
1040 | struct ocfs2_dinode *di = NULL; | |
2b0143b5 | 1041 | struct ocfs2_inode_info *oi = OCFS2_I(d_inode(dentry)); |
cf1d6c76 | 1042 | |
8154da3d TY |
1043 | if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) |
1044 | return -EOPNOTSUPP; | |
1045 | ||
cf1d6c76 TY |
1046 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
1047 | return ret; | |
1048 | ||
2b0143b5 | 1049 | ret = ocfs2_inode_lock(d_inode(dentry), &di_bh, 0); |
cf1d6c76 TY |
1050 | if (ret < 0) { |
1051 | mlog_errno(ret); | |
1052 | return ret; | |
1053 | } | |
1054 | ||
1055 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1056 | ||
1057 | down_read(&oi->ip_xattr_sem); | |
2b0143b5 | 1058 | i_ret = ocfs2_xattr_ibody_list(d_inode(dentry), di, buffer, size); |
cf1d6c76 TY |
1059 | if (i_ret < 0) |
1060 | b_ret = 0; | |
1061 | else { | |
1062 | if (buffer) { | |
1063 | buffer += i_ret; | |
1064 | size -= i_ret; | |
1065 | } | |
2b0143b5 | 1066 | b_ret = ocfs2_xattr_block_list(d_inode(dentry), di, |
cf1d6c76 TY |
1067 | buffer, size); |
1068 | if (b_ret < 0) | |
1069 | i_ret = 0; | |
1070 | } | |
1071 | up_read(&oi->ip_xattr_sem); | |
2b0143b5 | 1072 | ocfs2_inode_unlock(d_inode(dentry), 0); |
cf1d6c76 TY |
1073 | |
1074 | brelse(di_bh); | |
1075 | ||
1076 | return i_ret + b_ret; | |
1077 | } | |
1078 | ||
1079 | static int ocfs2_xattr_find_entry(int name_index, | |
1080 | const char *name, | |
1081 | struct ocfs2_xattr_search *xs) | |
1082 | { | |
1083 | struct ocfs2_xattr_entry *entry; | |
1084 | size_t name_len; | |
1085 | int i, cmp = 1; | |
1086 | ||
1087 | if (name == NULL) | |
1088 | return -EINVAL; | |
1089 | ||
1090 | name_len = strlen(name); | |
1091 | entry = xs->here; | |
1092 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1093 | cmp = name_index - ocfs2_xattr_get_type(entry); | |
1094 | if (!cmp) | |
1095 | cmp = name_len - entry->xe_name_len; | |
1096 | if (!cmp) | |
1097 | cmp = memcmp(name, (xs->base + | |
1098 | le16_to_cpu(entry->xe_name_offset)), | |
1099 | name_len); | |
1100 | if (cmp == 0) | |
1101 | break; | |
1102 | entry += 1; | |
1103 | } | |
1104 | xs->here = entry; | |
1105 | ||
1106 | return cmp ? -ENODATA : 0; | |
1107 | } | |
1108 | ||
1109 | static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
589dc260 | 1110 | struct ocfs2_xattr_value_root *xv, |
cf1d6c76 TY |
1111 | void *buffer, |
1112 | size_t len) | |
1113 | { | |
1114 | u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
1115 | u64 blkno; | |
1116 | int i, ret = 0; | |
1117 | size_t cplen, blocksize; | |
1118 | struct buffer_head *bh = NULL; | |
cf1d6c76 TY |
1119 | struct ocfs2_extent_list *el; |
1120 | ||
cf1d6c76 TY |
1121 | el = &xv->xr_list; |
1122 | clusters = le32_to_cpu(xv->xr_clusters); | |
1123 | bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1124 | blocksize = inode->i_sb->s_blocksize; | |
1125 | ||
1126 | cpos = 0; | |
1127 | while (cpos < clusters) { | |
1128 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1129 | &num_clusters, el, NULL); |
cf1d6c76 TY |
1130 | if (ret) { |
1131 | mlog_errno(ret); | |
1132 | goto out; | |
1133 | } | |
1134 | ||
1135 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
1136 | /* Copy ocfs2_xattr_value */ | |
1137 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1138 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1139 | &bh, NULL); | |
cf1d6c76 TY |
1140 | if (ret) { |
1141 | mlog_errno(ret); | |
1142 | goto out; | |
1143 | } | |
1144 | ||
1145 | cplen = len >= blocksize ? blocksize : len; | |
1146 | memcpy(buffer, bh->b_data, cplen); | |
1147 | len -= cplen; | |
1148 | buffer += cplen; | |
1149 | ||
1150 | brelse(bh); | |
1151 | bh = NULL; | |
1152 | if (len == 0) | |
1153 | break; | |
1154 | } | |
1155 | cpos += num_clusters; | |
1156 | } | |
1157 | out: | |
1158 | return ret; | |
1159 | } | |
1160 | ||
1161 | static int ocfs2_xattr_ibody_get(struct inode *inode, | |
1162 | int name_index, | |
1163 | const char *name, | |
1164 | void *buffer, | |
1165 | size_t buffer_size, | |
1166 | struct ocfs2_xattr_search *xs) | |
1167 | { | |
1168 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1169 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
589dc260 | 1170 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 TY |
1171 | size_t size; |
1172 | int ret = 0; | |
1173 | ||
1174 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
1175 | return -ENODATA; | |
1176 | ||
1177 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1178 | xs->header = (struct ocfs2_xattr_header *) | |
1179 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1180 | xs->base = (void *)xs->header; | |
1181 | xs->here = xs->header->xh_entries; | |
1182 | ||
1183 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1184 | if (ret) | |
1185 | return ret; | |
1186 | size = le64_to_cpu(xs->here->xe_value_size); | |
1187 | if (buffer) { | |
1188 | if (size > buffer_size) | |
1189 | return -ERANGE; | |
1190 | if (ocfs2_xattr_is_local(xs->here)) { | |
1191 | memcpy(buffer, (void *)xs->base + | |
1192 | le16_to_cpu(xs->here->xe_name_offset) + | |
1193 | OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
1194 | } else { | |
589dc260 TM |
1195 | xv = (struct ocfs2_xattr_value_root *) |
1196 | (xs->base + le16_to_cpu( | |
1197 | xs->here->xe_name_offset) + | |
1198 | OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
1199 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1200 | buffer, size); |
1201 | if (ret < 0) { | |
1202 | mlog_errno(ret); | |
1203 | return ret; | |
1204 | } | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | return size; | |
1209 | } | |
1210 | ||
1211 | static int ocfs2_xattr_block_get(struct inode *inode, | |
1212 | int name_index, | |
1213 | const char *name, | |
1214 | void *buffer, | |
1215 | size_t buffer_size, | |
1216 | struct ocfs2_xattr_search *xs) | |
1217 | { | |
cf1d6c76 | 1218 | struct ocfs2_xattr_block *xb; |
589dc260 | 1219 | struct ocfs2_xattr_value_root *xv; |
cf1d6c76 | 1220 | size_t size; |
44d8e4e1 SM |
1221 | int ret = -ENODATA, name_offset, name_len, i; |
1222 | int uninitialized_var(block_off); | |
cf1d6c76 | 1223 | |
ba937127 JB |
1224 | xs->bucket = ocfs2_xattr_bucket_new(inode); |
1225 | if (!xs->bucket) { | |
1226 | ret = -ENOMEM; | |
1227 | mlog_errno(ret); | |
1228 | goto cleanup; | |
1229 | } | |
589dc260 | 1230 | |
54f443f4 JB |
1231 | ret = ocfs2_xattr_block_find(inode, name_index, name, xs); |
1232 | if (ret) { | |
cf1d6c76 | 1233 | mlog_errno(ret); |
cf1d6c76 TY |
1234 | goto cleanup; |
1235 | } | |
1236 | ||
6c1e183e TY |
1237 | if (xs->not_found) { |
1238 | ret = -ENODATA; | |
1239 | goto cleanup; | |
1240 | } | |
1241 | ||
54f443f4 | 1242 | xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
1243 | size = le64_to_cpu(xs->here->xe_value_size); |
1244 | if (buffer) { | |
1245 | ret = -ERANGE; | |
1246 | if (size > buffer_size) | |
1247 | goto cleanup; | |
589dc260 TM |
1248 | |
1249 | name_offset = le16_to_cpu(xs->here->xe_name_offset); | |
1250 | name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); | |
1251 | i = xs->here - xs->header->xh_entries; | |
1252 | ||
1253 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 1254 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
ba937127 | 1255 | bucket_xh(xs->bucket), |
589dc260 TM |
1256 | i, |
1257 | &block_off, | |
1258 | &name_offset); | |
023d4ea3 JQ |
1259 | if (ret) { |
1260 | mlog_errno(ret); | |
1261 | goto cleanup; | |
1262 | } | |
ba937127 | 1263 | xs->base = bucket_block(xs->bucket, block_off); |
589dc260 | 1264 | } |
cf1d6c76 TY |
1265 | if (ocfs2_xattr_is_local(xs->here)) { |
1266 | memcpy(buffer, (void *)xs->base + | |
589dc260 | 1267 | name_offset + name_len, size); |
cf1d6c76 | 1268 | } else { |
589dc260 TM |
1269 | xv = (struct ocfs2_xattr_value_root *) |
1270 | (xs->base + name_offset + name_len); | |
1271 | ret = ocfs2_xattr_get_value_outside(inode, xv, | |
cf1d6c76 TY |
1272 | buffer, size); |
1273 | if (ret < 0) { | |
1274 | mlog_errno(ret); | |
1275 | goto cleanup; | |
1276 | } | |
1277 | } | |
1278 | } | |
1279 | ret = size; | |
1280 | cleanup: | |
ba937127 | 1281 | ocfs2_xattr_bucket_free(xs->bucket); |
cf1d6c76 | 1282 | |
54f443f4 JB |
1283 | brelse(xs->xattr_bh); |
1284 | xs->xattr_bh = NULL; | |
cf1d6c76 TY |
1285 | return ret; |
1286 | } | |
1287 | ||
4e3e9d02 TY |
1288 | int ocfs2_xattr_get_nolock(struct inode *inode, |
1289 | struct buffer_head *di_bh, | |
0030e001 TY |
1290 | int name_index, |
1291 | const char *name, | |
1292 | void *buffer, | |
1293 | size_t buffer_size) | |
cf1d6c76 TY |
1294 | { |
1295 | int ret; | |
1296 | struct ocfs2_dinode *di = NULL; | |
cf1d6c76 TY |
1297 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
1298 | struct ocfs2_xattr_search xis = { | |
1299 | .not_found = -ENODATA, | |
1300 | }; | |
1301 | struct ocfs2_xattr_search xbs = { | |
1302 | .not_found = -ENODATA, | |
1303 | }; | |
1304 | ||
8154da3d TY |
1305 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
1306 | return -EOPNOTSUPP; | |
1307 | ||
cf1d6c76 | 1308 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2b693005 | 1309 | return -ENODATA; |
cf1d6c76 | 1310 | |
cf1d6c76 TY |
1311 | xis.inode_bh = xbs.inode_bh = di_bh; |
1312 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
1313 | ||
cf1d6c76 TY |
1314 | ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, |
1315 | buffer_size, &xis); | |
6c1e183e | 1316 | if (ret == -ENODATA && di->i_xattr_loc) |
cf1d6c76 TY |
1317 | ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
1318 | buffer_size, &xbs); | |
4e3e9d02 TY |
1319 | |
1320 | return ret; | |
1321 | } | |
1322 | ||
1323 | /* ocfs2_xattr_get() | |
1324 | * | |
1325 | * Copy an extended attribute into the buffer provided. | |
1326 | * Buffer is NULL to compute the size of buffer required. | |
1327 | */ | |
1328 | static int ocfs2_xattr_get(struct inode *inode, | |
1329 | int name_index, | |
1330 | const char *name, | |
1331 | void *buffer, | |
1332 | size_t buffer_size) | |
1333 | { | |
8818efaa | 1334 | int ret, had_lock; |
4e3e9d02 | 1335 | struct buffer_head *di_bh = NULL; |
8818efaa | 1336 | struct ocfs2_lock_holder oh; |
4e3e9d02 | 1337 | |
8818efaa ER |
1338 | had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 0, &oh); |
1339 | if (had_lock < 0) { | |
1340 | mlog_errno(had_lock); | |
1341 | return had_lock; | |
4e3e9d02 | 1342 | } |
5e64b0d9 | 1343 | down_read(&OCFS2_I(inode)->ip_xattr_sem); |
4e3e9d02 TY |
1344 | ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, |
1345 | name, buffer, buffer_size); | |
5e64b0d9 | 1346 | up_read(&OCFS2_I(inode)->ip_xattr_sem); |
4e3e9d02 | 1347 | |
8818efaa | 1348 | ocfs2_inode_unlock_tracker(inode, 0, &oh, had_lock); |
cf1d6c76 TY |
1349 | |
1350 | brelse(di_bh); | |
1351 | ||
1352 | return ret; | |
1353 | } | |
1354 | ||
1355 | static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
85db90e7 | 1356 | handle_t *handle, |
492a8a33 | 1357 | struct ocfs2_xattr_value_buf *vb, |
cf1d6c76 TY |
1358 | const void *value, |
1359 | int value_len) | |
1360 | { | |
71d548a6 | 1361 | int ret = 0, i, cp_len; |
cf1d6c76 TY |
1362 | u16 blocksize = inode->i_sb->s_blocksize; |
1363 | u32 p_cluster, num_clusters; | |
1364 | u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
1365 | u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
1366 | u64 blkno; | |
1367 | struct buffer_head *bh = NULL; | |
492a8a33 TM |
1368 | unsigned int ext_flags; |
1369 | struct ocfs2_xattr_value_root *xv = vb->vb_xv; | |
cf1d6c76 TY |
1370 | |
1371 | BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
1372 | ||
cf1d6c76 TY |
1373 | while (cpos < clusters) { |
1374 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
1061f9c1 | 1375 | &num_clusters, &xv->xr_list, |
492a8a33 | 1376 | &ext_flags); |
cf1d6c76 TY |
1377 | if (ret) { |
1378 | mlog_errno(ret); | |
85db90e7 | 1379 | goto out; |
cf1d6c76 TY |
1380 | } |
1381 | ||
492a8a33 TM |
1382 | BUG_ON(ext_flags & OCFS2_EXT_REFCOUNTED); |
1383 | ||
cf1d6c76 TY |
1384 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); |
1385 | ||
1386 | for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
8cb471e8 JB |
1387 | ret = ocfs2_read_block(INODE_CACHE(inode), blkno, |
1388 | &bh, NULL); | |
cf1d6c76 TY |
1389 | if (ret) { |
1390 | mlog_errno(ret); | |
85db90e7 | 1391 | goto out; |
cf1d6c76 TY |
1392 | } |
1393 | ||
1394 | ret = ocfs2_journal_access(handle, | |
0cf2f763 | 1395 | INODE_CACHE(inode), |
cf1d6c76 TY |
1396 | bh, |
1397 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1398 | if (ret < 0) { | |
1399 | mlog_errno(ret); | |
85db90e7 | 1400 | goto out; |
cf1d6c76 TY |
1401 | } |
1402 | ||
1403 | cp_len = value_len > blocksize ? blocksize : value_len; | |
1404 | memcpy(bh->b_data, value, cp_len); | |
1405 | value_len -= cp_len; | |
1406 | value += cp_len; | |
1407 | if (cp_len < blocksize) | |
1408 | memset(bh->b_data + cp_len, 0, | |
1409 | blocksize - cp_len); | |
1410 | ||
ec20cec7 | 1411 | ocfs2_journal_dirty(handle, bh); |
cf1d6c76 TY |
1412 | brelse(bh); |
1413 | bh = NULL; | |
1414 | ||
1415 | /* | |
1416 | * XXX: do we need to empty all the following | |
1417 | * blocks in this cluster? | |
1418 | */ | |
1419 | if (!value_len) | |
1420 | break; | |
1421 | } | |
1422 | cpos += num_clusters; | |
1423 | } | |
cf1d6c76 TY |
1424 | out: |
1425 | brelse(bh); | |
1426 | ||
1427 | return ret; | |
1428 | } | |
1429 | ||
69a3e539 JB |
1430 | static int ocfs2_xa_check_space_helper(int needed_space, int free_start, |
1431 | int num_entries) | |
1432 | { | |
1433 | int free_space; | |
1434 | ||
1435 | if (!needed_space) | |
1436 | return 0; | |
1437 | ||
1438 | free_space = free_start - | |
1439 | sizeof(struct ocfs2_xattr_header) - | |
1440 | (num_entries * sizeof(struct ocfs2_xattr_entry)) - | |
1441 | OCFS2_XATTR_HEADER_GAP; | |
1442 | if (free_space < 0) | |
1443 | return -EIO; | |
1444 | if (free_space < needed_space) | |
1445 | return -ENOSPC; | |
1446 | ||
1447 | return 0; | |
1448 | } | |
1449 | ||
cf2bc809 JB |
1450 | static int ocfs2_xa_journal_access(handle_t *handle, struct ocfs2_xa_loc *loc, |
1451 | int type) | |
1452 | { | |
1453 | return loc->xl_ops->xlo_journal_access(handle, loc, type); | |
1454 | } | |
1455 | ||
1456 | static void ocfs2_xa_journal_dirty(handle_t *handle, struct ocfs2_xa_loc *loc) | |
1457 | { | |
1458 | loc->xl_ops->xlo_journal_dirty(handle, loc); | |
1459 | } | |
1460 | ||
69a3e539 JB |
1461 | /* Give a pointer into the storage for the given offset */ |
1462 | static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset) | |
1463 | { | |
1464 | BUG_ON(offset >= loc->xl_size); | |
1465 | return loc->xl_ops->xlo_offset_pointer(loc, offset); | |
1466 | } | |
1467 | ||
11179f2c JB |
1468 | /* |
1469 | * Wipe the name+value pair and allow the storage to reclaim it. This | |
1470 | * must be followed by either removal of the entry or a call to | |
1471 | * ocfs2_xa_add_namevalue(). | |
1472 | */ | |
1473 | static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1474 | { | |
1475 | loc->xl_ops->xlo_wipe_namevalue(loc); | |
1476 | } | |
1477 | ||
69a3e539 JB |
1478 | /* |
1479 | * Find lowest offset to a name+value pair. This is the start of our | |
1480 | * downward-growing free space. | |
1481 | */ | |
1482 | static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc) | |
1483 | { | |
1484 | return loc->xl_ops->xlo_get_free_start(loc); | |
1485 | } | |
1486 | ||
1487 | /* Can we reuse loc->xl_entry for xi? */ | |
1488 | static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc, | |
1489 | struct ocfs2_xattr_info *xi) | |
1490 | { | |
1491 | return loc->xl_ops->xlo_can_reuse(loc, xi); | |
1492 | } | |
1493 | ||
1494 | /* How much free space is needed to set the new value */ | |
1495 | static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc, | |
1496 | struct ocfs2_xattr_info *xi) | |
1497 | { | |
1498 | return loc->xl_ops->xlo_check_space(loc, xi); | |
1499 | } | |
1500 | ||
1501 | static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) | |
1502 | { | |
1503 | loc->xl_ops->xlo_add_entry(loc, name_hash); | |
1504 | loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash); | |
1505 | /* | |
1506 | * We can't leave the new entry's xe_name_offset at zero or | |
1507 | * add_namevalue() will go nuts. We set it to the size of our | |
1508 | * storage so that it can never be less than any other entry. | |
1509 | */ | |
1510 | loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size); | |
1511 | } | |
1512 | ||
1513 | static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc, | |
1514 | struct ocfs2_xattr_info *xi) | |
1515 | { | |
1516 | int size = namevalue_size_xi(xi); | |
1517 | int nameval_offset; | |
1518 | char *nameval_buf; | |
1519 | ||
1520 | loc->xl_ops->xlo_add_namevalue(loc, size); | |
1521 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
1522 | loc->xl_entry->xe_name_len = xi->xi_name_len; | |
1523 | ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index); | |
1524 | ocfs2_xattr_set_local(loc->xl_entry, | |
1525 | xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE); | |
1526 | ||
1527 | nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1528 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); | |
1529 | memset(nameval_buf, 0, size); | |
1530 | memcpy(nameval_buf, xi->xi_name, xi->xi_name_len); | |
1531 | } | |
1532 | ||
3fc12afa JB |
1533 | static void ocfs2_xa_fill_value_buf(struct ocfs2_xa_loc *loc, |
1534 | struct ocfs2_xattr_value_buf *vb) | |
1535 | { | |
1536 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); | |
1537 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
1538 | ||
1539 | /* Value bufs are for value trees */ | |
73857ee0 | 1540 | BUG_ON(ocfs2_xattr_is_local(loc->xl_entry)); |
3fc12afa JB |
1541 | BUG_ON(namevalue_size_xe(loc->xl_entry) != |
1542 | (name_size + OCFS2_XATTR_ROOT_SIZE)); | |
1543 | ||
1544 | loc->xl_ops->xlo_fill_value_buf(loc, vb); | |
1545 | vb->vb_xv = | |
1546 | (struct ocfs2_xattr_value_root *)ocfs2_xa_offset_pointer(loc, | |
1547 | nameval_offset + | |
1548 | name_size); | |
1549 | } | |
1550 | ||
cf2bc809 JB |
1551 | static int ocfs2_xa_block_journal_access(handle_t *handle, |
1552 | struct ocfs2_xa_loc *loc, int type) | |
1553 | { | |
1554 | struct buffer_head *bh = loc->xl_storage; | |
1555 | ocfs2_journal_access_func access; | |
1556 | ||
1557 | if (loc->xl_size == (bh->b_size - | |
1558 | offsetof(struct ocfs2_xattr_block, | |
1559 | xb_attrs.xb_header))) | |
1560 | access = ocfs2_journal_access_xb; | |
1561 | else | |
1562 | access = ocfs2_journal_access_di; | |
1563 | return access(handle, INODE_CACHE(loc->xl_inode), bh, type); | |
1564 | } | |
1565 | ||
1566 | static void ocfs2_xa_block_journal_dirty(handle_t *handle, | |
1567 | struct ocfs2_xa_loc *loc) | |
1568 | { | |
1569 | struct buffer_head *bh = loc->xl_storage; | |
1570 | ||
1571 | ocfs2_journal_dirty(handle, bh); | |
1572 | } | |
1573 | ||
11179f2c JB |
1574 | static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc, |
1575 | int offset) | |
1576 | { | |
11179f2c JB |
1577 | return (char *)loc->xl_header + offset; |
1578 | } | |
1579 | ||
69a3e539 JB |
1580 | static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc, |
1581 | struct ocfs2_xattr_info *xi) | |
1582 | { | |
1583 | /* | |
1584 | * Block storage is strict. If the sizes aren't exact, we will | |
1585 | * remove the old one and reinsert the new. | |
1586 | */ | |
1587 | return namevalue_size_xe(loc->xl_entry) == | |
1588 | namevalue_size_xi(xi); | |
1589 | } | |
1590 | ||
1591 | static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc) | |
1592 | { | |
1593 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1594 | int i, count = le16_to_cpu(xh->xh_count); | |
1595 | int offset, free_start = loc->xl_size; | |
1596 | ||
1597 | for (i = 0; i < count; i++) { | |
1598 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
1599 | if (offset < free_start) | |
1600 | free_start = offset; | |
1601 | } | |
1602 | ||
1603 | return free_start; | |
1604 | } | |
1605 | ||
1606 | static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc, | |
1607 | struct ocfs2_xattr_info *xi) | |
1608 | { | |
1609 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1610 | int free_start = ocfs2_xa_get_free_start(loc); | |
1611 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1612 | ||
1613 | /* | |
1614 | * Block storage will reclaim the original entry before inserting | |
1615 | * the new value, so we only need the difference. If the new | |
1616 | * entry is smaller than the old one, we don't need anything. | |
1617 | */ | |
1618 | if (loc->xl_entry) { | |
1619 | /* Don't need space if we're reusing! */ | |
1620 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1621 | needed_space = 0; | |
1622 | else | |
1623 | needed_space -= ocfs2_xe_entry_usage(loc->xl_entry); | |
1624 | } | |
1625 | if (needed_space < 0) | |
1626 | needed_space = 0; | |
1627 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1628 | } | |
1629 | ||
11179f2c JB |
1630 | /* |
1631 | * Block storage for xattrs keeps the name+value pairs compacted. When | |
1632 | * we remove one, we have to shift any that preceded it towards the end. | |
1633 | */ | |
1634 | static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc) | |
1635 | { | |
1636 | int i, offset; | |
1637 | int namevalue_offset, first_namevalue_offset, namevalue_size; | |
1638 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1639 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
11179f2c JB |
1640 | int count = le16_to_cpu(xh->xh_count); |
1641 | ||
1642 | namevalue_offset = le16_to_cpu(entry->xe_name_offset); | |
199799a3 | 1643 | namevalue_size = namevalue_size_xe(entry); |
69a3e539 | 1644 | first_namevalue_offset = ocfs2_xa_get_free_start(loc); |
11179f2c JB |
1645 | |
1646 | /* Shift the name+value pairs */ | |
1647 | memmove((char *)xh + first_namevalue_offset + namevalue_size, | |
1648 | (char *)xh + first_namevalue_offset, | |
1649 | namevalue_offset - first_namevalue_offset); | |
1650 | memset((char *)xh + first_namevalue_offset, 0, namevalue_size); | |
1651 | ||
1652 | /* Now tell xh->xh_entries about it */ | |
1653 | for (i = 0; i < count; i++) { | |
1654 | offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset); | |
dfe4d3d6 | 1655 | if (offset <= namevalue_offset) |
11179f2c JB |
1656 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, |
1657 | namevalue_size); | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * Note that we don't update xh_free_start or xh_name_value_len | |
1662 | * because they're not used in block-stored xattrs. | |
1663 | */ | |
1664 | } | |
1665 | ||
69a3e539 JB |
1666 | static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1667 | { | |
1668 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1669 | loc->xl_entry = &(loc->xl_header->xh_entries[count]); | |
1670 | le16_add_cpu(&loc->xl_header->xh_count, 1); | |
1671 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1672 | } | |
1673 | ||
1674 | static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1675 | { | |
1676 | int free_start = ocfs2_xa_get_free_start(loc); | |
1677 | ||
1678 | loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size); | |
1679 | } | |
1680 | ||
3fc12afa JB |
1681 | static void ocfs2_xa_block_fill_value_buf(struct ocfs2_xa_loc *loc, |
1682 | struct ocfs2_xattr_value_buf *vb) | |
1683 | { | |
1684 | struct buffer_head *bh = loc->xl_storage; | |
1685 | ||
1686 | if (loc->xl_size == (bh->b_size - | |
1687 | offsetof(struct ocfs2_xattr_block, | |
1688 | xb_attrs.xb_header))) | |
1689 | vb->vb_access = ocfs2_journal_access_xb; | |
1690 | else | |
1691 | vb->vb_access = ocfs2_journal_access_di; | |
1692 | vb->vb_bh = bh; | |
1693 | } | |
1694 | ||
11179f2c JB |
1695 | /* |
1696 | * Operations for xattrs stored in blocks. This includes inline inode | |
1697 | * storage and unindexed ocfs2_xattr_blocks. | |
1698 | */ | |
1699 | static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = { | |
cf2bc809 JB |
1700 | .xlo_journal_access = ocfs2_xa_block_journal_access, |
1701 | .xlo_journal_dirty = ocfs2_xa_block_journal_dirty, | |
11179f2c | 1702 | .xlo_offset_pointer = ocfs2_xa_block_offset_pointer, |
69a3e539 JB |
1703 | .xlo_check_space = ocfs2_xa_block_check_space, |
1704 | .xlo_can_reuse = ocfs2_xa_block_can_reuse, | |
1705 | .xlo_get_free_start = ocfs2_xa_block_get_free_start, | |
11179f2c | 1706 | .xlo_wipe_namevalue = ocfs2_xa_block_wipe_namevalue, |
69a3e539 JB |
1707 | .xlo_add_entry = ocfs2_xa_block_add_entry, |
1708 | .xlo_add_namevalue = ocfs2_xa_block_add_namevalue, | |
3fc12afa | 1709 | .xlo_fill_value_buf = ocfs2_xa_block_fill_value_buf, |
11179f2c JB |
1710 | }; |
1711 | ||
cf2bc809 JB |
1712 | static int ocfs2_xa_bucket_journal_access(handle_t *handle, |
1713 | struct ocfs2_xa_loc *loc, int type) | |
1714 | { | |
1715 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1716 | ||
1717 | return ocfs2_xattr_bucket_journal_access(handle, bucket, type); | |
1718 | } | |
1719 | ||
1720 | static void ocfs2_xa_bucket_journal_dirty(handle_t *handle, | |
1721 | struct ocfs2_xa_loc *loc) | |
1722 | { | |
1723 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1724 | ||
1725 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
1726 | } | |
1727 | ||
11179f2c JB |
1728 | static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc, |
1729 | int offset) | |
1730 | { | |
1731 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1732 | int block, block_offset; | |
1733 | ||
11179f2c | 1734 | /* The header is at the front of the bucket */ |
cf2bc809 JB |
1735 | block = offset >> loc->xl_inode->i_sb->s_blocksize_bits; |
1736 | block_offset = offset % loc->xl_inode->i_sb->s_blocksize; | |
11179f2c JB |
1737 | |
1738 | return bucket_block(bucket, block) + block_offset; | |
1739 | } | |
1740 | ||
69a3e539 JB |
1741 | static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc, |
1742 | struct ocfs2_xattr_info *xi) | |
1743 | { | |
1744 | return namevalue_size_xe(loc->xl_entry) >= | |
1745 | namevalue_size_xi(xi); | |
1746 | } | |
1747 | ||
1748 | static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc) | |
1749 | { | |
1750 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
1751 | return le16_to_cpu(bucket_xh(bucket)->xh_free_start); | |
1752 | } | |
1753 | ||
1754 | static int ocfs2_bucket_align_free_start(struct super_block *sb, | |
1755 | int free_start, int size) | |
1756 | { | |
1757 | /* | |
1758 | * We need to make sure that the name+value pair fits within | |
1759 | * one block. | |
1760 | */ | |
1761 | if (((free_start - size) >> sb->s_blocksize_bits) != | |
1762 | ((free_start - 1) >> sb->s_blocksize_bits)) | |
1763 | free_start -= free_start % sb->s_blocksize; | |
1764 | ||
1765 | return free_start; | |
1766 | } | |
1767 | ||
1768 | static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc, | |
1769 | struct ocfs2_xattr_info *xi) | |
1770 | { | |
1771 | int rc; | |
1772 | int count = le16_to_cpu(loc->xl_header->xh_count); | |
1773 | int free_start = ocfs2_xa_get_free_start(loc); | |
1774 | int needed_space = ocfs2_xi_entry_usage(xi); | |
1775 | int size = namevalue_size_xi(xi); | |
cf2bc809 | 1776 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1777 | |
1778 | /* | |
1779 | * Bucket storage does not reclaim name+value pairs it cannot | |
1780 | * reuse. They live as holes until the bucket fills, and then | |
1781 | * the bucket is defragmented. However, the bucket can reclaim | |
1782 | * the ocfs2_xattr_entry. | |
1783 | */ | |
1784 | if (loc->xl_entry) { | |
1785 | /* Don't need space if we're reusing! */ | |
1786 | if (ocfs2_xa_can_reuse_entry(loc, xi)) | |
1787 | needed_space = 0; | |
1788 | else | |
1789 | needed_space -= sizeof(struct ocfs2_xattr_entry); | |
1790 | } | |
1791 | BUG_ON(needed_space < 0); | |
1792 | ||
1793 | if (free_start < size) { | |
1794 | if (needed_space) | |
1795 | return -ENOSPC; | |
1796 | } else { | |
1797 | /* | |
1798 | * First we check if it would fit in the first place. | |
1799 | * Below, we align the free start to a block. This may | |
1800 | * slide us below the minimum gap. By checking unaligned | |
1801 | * first, we avoid that error. | |
1802 | */ | |
1803 | rc = ocfs2_xa_check_space_helper(needed_space, free_start, | |
1804 | count); | |
1805 | if (rc) | |
1806 | return rc; | |
1807 | free_start = ocfs2_bucket_align_free_start(sb, free_start, | |
1808 | size); | |
1809 | } | |
1810 | return ocfs2_xa_check_space_helper(needed_space, free_start, count); | |
1811 | } | |
1812 | ||
11179f2c JB |
1813 | static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc) |
1814 | { | |
199799a3 JB |
1815 | le16_add_cpu(&loc->xl_header->xh_name_value_len, |
1816 | -namevalue_size_xe(loc->xl_entry)); | |
11179f2c JB |
1817 | } |
1818 | ||
69a3e539 JB |
1819 | static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash) |
1820 | { | |
1821 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1822 | int count = le16_to_cpu(xh->xh_count); | |
1823 | int low = 0, high = count - 1, tmp; | |
1824 | struct ocfs2_xattr_entry *tmp_xe; | |
1825 | ||
1826 | /* | |
1827 | * We keep buckets sorted by name_hash, so we need to find | |
1828 | * our insert place. | |
1829 | */ | |
1830 | while (low <= high && count) { | |
1831 | tmp = (low + high) / 2; | |
1832 | tmp_xe = &xh->xh_entries[tmp]; | |
1833 | ||
1834 | if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) | |
1835 | low = tmp + 1; | |
1836 | else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash)) | |
1837 | high = tmp - 1; | |
1838 | else { | |
1839 | low = tmp; | |
1840 | break; | |
1841 | } | |
1842 | } | |
1843 | ||
1844 | if (low != count) | |
1845 | memmove(&xh->xh_entries[low + 1], | |
1846 | &xh->xh_entries[low], | |
1847 | ((count - low) * sizeof(struct ocfs2_xattr_entry))); | |
1848 | ||
1849 | le16_add_cpu(&xh->xh_count, 1); | |
1850 | loc->xl_entry = &xh->xh_entries[low]; | |
1851 | memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry)); | |
1852 | } | |
1853 | ||
1854 | static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size) | |
1855 | { | |
1856 | int free_start = ocfs2_xa_get_free_start(loc); | |
1857 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
cf2bc809 | 1858 | struct super_block *sb = loc->xl_inode->i_sb; |
69a3e539 JB |
1859 | int nameval_offset; |
1860 | ||
1861 | free_start = ocfs2_bucket_align_free_start(sb, free_start, size); | |
1862 | nameval_offset = free_start - size; | |
1863 | loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset); | |
1864 | xh->xh_free_start = cpu_to_le16(nameval_offset); | |
1865 | le16_add_cpu(&xh->xh_name_value_len, size); | |
1866 | ||
1867 | } | |
1868 | ||
3fc12afa JB |
1869 | static void ocfs2_xa_bucket_fill_value_buf(struct ocfs2_xa_loc *loc, |
1870 | struct ocfs2_xattr_value_buf *vb) | |
1871 | { | |
1872 | struct ocfs2_xattr_bucket *bucket = loc->xl_storage; | |
cf2bc809 | 1873 | struct super_block *sb = loc->xl_inode->i_sb; |
3fc12afa JB |
1874 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
1875 | int size = namevalue_size_xe(loc->xl_entry); | |
1876 | int block_offset = nameval_offset >> sb->s_blocksize_bits; | |
1877 | ||
1878 | /* Values are not allowed to straddle block boundaries */ | |
1879 | BUG_ON(block_offset != | |
1880 | ((nameval_offset + size - 1) >> sb->s_blocksize_bits)); | |
1881 | /* We expect the bucket to be filled in */ | |
1882 | BUG_ON(!bucket->bu_bhs[block_offset]); | |
1883 | ||
1884 | vb->vb_access = ocfs2_journal_access; | |
1885 | vb->vb_bh = bucket->bu_bhs[block_offset]; | |
1886 | } | |
1887 | ||
11179f2c JB |
1888 | /* Operations for xattrs stored in buckets. */ |
1889 | static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = { | |
cf2bc809 JB |
1890 | .xlo_journal_access = ocfs2_xa_bucket_journal_access, |
1891 | .xlo_journal_dirty = ocfs2_xa_bucket_journal_dirty, | |
11179f2c | 1892 | .xlo_offset_pointer = ocfs2_xa_bucket_offset_pointer, |
69a3e539 JB |
1893 | .xlo_check_space = ocfs2_xa_bucket_check_space, |
1894 | .xlo_can_reuse = ocfs2_xa_bucket_can_reuse, | |
1895 | .xlo_get_free_start = ocfs2_xa_bucket_get_free_start, | |
11179f2c | 1896 | .xlo_wipe_namevalue = ocfs2_xa_bucket_wipe_namevalue, |
69a3e539 JB |
1897 | .xlo_add_entry = ocfs2_xa_bucket_add_entry, |
1898 | .xlo_add_namevalue = ocfs2_xa_bucket_add_namevalue, | |
3fc12afa | 1899 | .xlo_fill_value_buf = ocfs2_xa_bucket_fill_value_buf, |
11179f2c JB |
1900 | }; |
1901 | ||
399ff3a7 JB |
1902 | static unsigned int ocfs2_xa_value_clusters(struct ocfs2_xa_loc *loc) |
1903 | { | |
1904 | struct ocfs2_xattr_value_buf vb; | |
1905 | ||
1906 | if (ocfs2_xattr_is_local(loc->xl_entry)) | |
1907 | return 0; | |
1908 | ||
1909 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1910 | return le32_to_cpu(vb.vb_xv->xr_clusters); | |
1911 | } | |
1912 | ||
73857ee0 JB |
1913 | static int ocfs2_xa_value_truncate(struct ocfs2_xa_loc *loc, u64 bytes, |
1914 | struct ocfs2_xattr_set_ctxt *ctxt) | |
1915 | { | |
1916 | int trunc_rc, access_rc; | |
1917 | struct ocfs2_xattr_value_buf vb; | |
1918 | ||
1919 | ocfs2_xa_fill_value_buf(loc, &vb); | |
1920 | trunc_rc = ocfs2_xattr_value_truncate(loc->xl_inode, &vb, bytes, | |
1921 | ctxt); | |
1922 | ||
1923 | /* | |
1924 | * The caller of ocfs2_xa_value_truncate() has already called | |
1925 | * ocfs2_xa_journal_access on the loc. However, The truncate code | |
1926 | * calls ocfs2_extend_trans(). This may commit the previous | |
1927 | * transaction and open a new one. If this is a bucket, truncate | |
1928 | * could leave only vb->vb_bh set up for journaling. Meanwhile, | |
1929 | * the caller is expecting to dirty the entire bucket. So we must | |
1930 | * reset the journal work. We do this even if truncate has failed, | |
1931 | * as it could have failed after committing the extend. | |
1932 | */ | |
1933 | access_rc = ocfs2_xa_journal_access(ctxt->handle, loc, | |
1934 | OCFS2_JOURNAL_ACCESS_WRITE); | |
1935 | ||
1936 | /* Errors in truncate take precedence */ | |
1937 | return trunc_rc ? trunc_rc : access_rc; | |
1938 | } | |
1939 | ||
11179f2c JB |
1940 | static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc) |
1941 | { | |
bde1e540 JB |
1942 | int index, count; |
1943 | struct ocfs2_xattr_header *xh = loc->xl_header; | |
1944 | struct ocfs2_xattr_entry *entry = loc->xl_entry; | |
1945 | ||
11179f2c | 1946 | ocfs2_xa_wipe_namevalue(loc); |
bde1e540 JB |
1947 | loc->xl_entry = NULL; |
1948 | ||
1949 | le16_add_cpu(&xh->xh_count, -1); | |
1950 | count = le16_to_cpu(xh->xh_count); | |
1951 | ||
1952 | /* | |
1953 | * Only zero out the entry if there are more remaining. This is | |
1954 | * important for an empty bucket, as it keeps track of the | |
1955 | * bucket's hash value. It doesn't hurt empty block storage. | |
1956 | */ | |
1957 | if (count) { | |
1958 | index = ((char *)entry - (char *)&xh->xh_entries) / | |
1959 | sizeof(struct ocfs2_xattr_entry); | |
1960 | memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1], | |
1961 | (count - index) * sizeof(struct ocfs2_xattr_entry)); | |
1962 | memset(&xh->xh_entries[count], 0, | |
1963 | sizeof(struct ocfs2_xattr_entry)); | |
1964 | } | |
11179f2c JB |
1965 | } |
1966 | ||
399ff3a7 JB |
1967 | /* |
1968 | * If we have a problem adjusting the size of an external value during | |
1969 | * ocfs2_xa_prepare_entry() or ocfs2_xa_remove(), we may have an xattr | |
1970 | * in an intermediate state. For example, the value may be partially | |
1971 | * truncated. | |
1972 | * | |
1973 | * If the value tree hasn't changed, the extend/truncate went nowhere. | |
1974 | * We have nothing to do. The caller can treat it as a straight error. | |
1975 | * | |
1976 | * If the value tree got partially truncated, we now have a corrupted | |
1977 | * extended attribute. We're going to wipe its entry and leak the | |
1978 | * clusters. Better to leak some storage than leave a corrupt entry. | |
1979 | * | |
1980 | * If the value tree grew, it obviously didn't grow enough for the | |
1981 | * new entry. We're not going to try and reclaim those clusters either. | |
1982 | * If there was already an external value there (orig_clusters != 0), | |
1983 | * the new clusters are attached safely and we can just leave the old | |
1984 | * value in place. If there was no external value there, we remove | |
1985 | * the entry. | |
1986 | * | |
1987 | * This way, the xattr block we store in the journal will be consistent. | |
1988 | * If the size change broke because of the journal, no changes will hit | |
1989 | * disk anyway. | |
1990 | */ | |
1991 | static void ocfs2_xa_cleanup_value_truncate(struct ocfs2_xa_loc *loc, | |
1992 | const char *what, | |
1993 | unsigned int orig_clusters) | |
1994 | { | |
1995 | unsigned int new_clusters = ocfs2_xa_value_clusters(loc); | |
1996 | char *nameval_buf = ocfs2_xa_offset_pointer(loc, | |
1997 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
1998 | ||
1999 | if (new_clusters < orig_clusters) { | |
2000 | mlog(ML_ERROR, | |
2001 | "Partial truncate while %s xattr %.*s. Leaking " | |
2002 | "%u clusters and removing the entry\n", | |
2003 | what, loc->xl_entry->xe_name_len, nameval_buf, | |
2004 | orig_clusters - new_clusters); | |
2005 | ocfs2_xa_remove_entry(loc); | |
2006 | } else if (!orig_clusters) { | |
2007 | mlog(ML_ERROR, | |
2008 | "Unable to allocate an external value for xattr " | |
2009 | "%.*s safely. Leaking %u clusters and removing the " | |
2010 | "entry\n", | |
2011 | loc->xl_entry->xe_name_len, nameval_buf, | |
2012 | new_clusters - orig_clusters); | |
2013 | ocfs2_xa_remove_entry(loc); | |
2014 | } else if (new_clusters > orig_clusters) | |
2015 | mlog(ML_ERROR, | |
2016 | "Unable to grow xattr %.*s safely. %u new clusters " | |
2017 | "have been added, but the value will not be " | |
2018 | "modified\n", | |
2019 | loc->xl_entry->xe_name_len, nameval_buf, | |
2020 | new_clusters - orig_clusters); | |
2021 | } | |
2022 | ||
73857ee0 JB |
2023 | static int ocfs2_xa_remove(struct ocfs2_xa_loc *loc, |
2024 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2025 | { | |
2026 | int rc = 0; | |
399ff3a7 | 2027 | unsigned int orig_clusters; |
73857ee0 JB |
2028 | |
2029 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { | |
399ff3a7 | 2030 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2031 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2032 | if (rc) { | |
2033 | mlog_errno(rc); | |
399ff3a7 JB |
2034 | /* |
2035 | * Since this is remove, we can return 0 if | |
2036 | * ocfs2_xa_cleanup_value_truncate() is going to | |
2037 | * wipe the entry anyway. So we check the | |
2038 | * cluster count as well. | |
2039 | */ | |
2040 | if (orig_clusters != ocfs2_xa_value_clusters(loc)) | |
2041 | rc = 0; | |
2042 | ocfs2_xa_cleanup_value_truncate(loc, "removing", | |
2043 | orig_clusters); | |
2044 | if (rc) | |
2045 | goto out; | |
73857ee0 JB |
2046 | } |
2047 | } | |
2048 | ||
2049 | ocfs2_xa_remove_entry(loc); | |
2050 | ||
2051 | out: | |
2052 | return rc; | |
2053 | } | |
2054 | ||
2055 | static void ocfs2_xa_install_value_root(struct ocfs2_xa_loc *loc) | |
2056 | { | |
2057 | int name_size = OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len); | |
2058 | char *nameval_buf; | |
2059 | ||
2060 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2061 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2062 | memcpy(nameval_buf + name_size, &def_xv, OCFS2_XATTR_ROOT_SIZE); | |
2063 | } | |
2064 | ||
2065 | /* | |
2066 | * Take an existing entry and make it ready for the new value. This | |
2067 | * won't allocate space, but it may free space. It should be ready for | |
2068 | * ocfs2_xa_prepare_entry() to finish the work. | |
2069 | */ | |
2070 | static int ocfs2_xa_reuse_entry(struct ocfs2_xa_loc *loc, | |
2071 | struct ocfs2_xattr_info *xi, | |
2072 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2073 | { | |
2074 | int rc = 0; | |
2075 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
399ff3a7 | 2076 | unsigned int orig_clusters; |
73857ee0 JB |
2077 | char *nameval_buf; |
2078 | int xe_local = ocfs2_xattr_is_local(loc->xl_entry); | |
2079 | int xi_local = xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE; | |
2080 | ||
2081 | BUG_ON(OCFS2_XATTR_SIZE(loc->xl_entry->xe_name_len) != | |
2082 | name_size); | |
2083 | ||
2084 | nameval_buf = ocfs2_xa_offset_pointer(loc, | |
2085 | le16_to_cpu(loc->xl_entry->xe_name_offset)); | |
2086 | if (xe_local) { | |
2087 | memset(nameval_buf + name_size, 0, | |
2088 | namevalue_size_xe(loc->xl_entry) - name_size); | |
2089 | if (!xi_local) | |
2090 | ocfs2_xa_install_value_root(loc); | |
2091 | } else { | |
399ff3a7 | 2092 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2093 | if (xi_local) { |
2094 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); | |
399ff3a7 | 2095 | if (rc < 0) |
73857ee0 | 2096 | mlog_errno(rc); |
399ff3a7 JB |
2097 | else |
2098 | memset(nameval_buf + name_size, 0, | |
2099 | namevalue_size_xe(loc->xl_entry) - | |
2100 | name_size); | |
73857ee0 JB |
2101 | } else if (le64_to_cpu(loc->xl_entry->xe_value_size) > |
2102 | xi->xi_value_len) { | |
2103 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, | |
2104 | ctxt); | |
399ff3a7 | 2105 | if (rc < 0) |
73857ee0 | 2106 | mlog_errno(rc); |
399ff3a7 JB |
2107 | } |
2108 | ||
2109 | if (rc) { | |
2110 | ocfs2_xa_cleanup_value_truncate(loc, "reusing", | |
2111 | orig_clusters); | |
2112 | goto out; | |
73857ee0 JB |
2113 | } |
2114 | } | |
2115 | ||
2116 | loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len); | |
2117 | ocfs2_xattr_set_local(loc->xl_entry, xi_local); | |
2118 | ||
2119 | out: | |
2120 | return rc; | |
2121 | } | |
2122 | ||
69a3e539 JB |
2123 | /* |
2124 | * Prepares loc->xl_entry to receive the new xattr. This includes | |
2125 | * properly setting up the name+value pair region. If loc->xl_entry | |
2126 | * already exists, it will take care of modifying it appropriately. | |
69a3e539 JB |
2127 | * |
2128 | * Note that this modifies the data. You did journal_access already, | |
2129 | * right? | |
2130 | */ | |
2131 | static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc, | |
2132 | struct ocfs2_xattr_info *xi, | |
73857ee0 JB |
2133 | u32 name_hash, |
2134 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 JB |
2135 | { |
2136 | int rc = 0; | |
399ff3a7 JB |
2137 | unsigned int orig_clusters; |
2138 | __le64 orig_value_size = 0; | |
69a3e539 | 2139 | |
69a3e539 JB |
2140 | rc = ocfs2_xa_check_space(loc, xi); |
2141 | if (rc) | |
2142 | goto out; | |
2143 | ||
2144 | if (loc->xl_entry) { | |
2145 | if (ocfs2_xa_can_reuse_entry(loc, xi)) { | |
399ff3a7 | 2146 | orig_value_size = loc->xl_entry->xe_value_size; |
73857ee0 JB |
2147 | rc = ocfs2_xa_reuse_entry(loc, xi, ctxt); |
2148 | if (rc) | |
2149 | goto out; | |
2150 | goto alloc_value; | |
69a3e539 JB |
2151 | } |
2152 | ||
73857ee0 | 2153 | if (!ocfs2_xattr_is_local(loc->xl_entry)) { |
399ff3a7 | 2154 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 JB |
2155 | rc = ocfs2_xa_value_truncate(loc, 0, ctxt); |
2156 | if (rc) { | |
2157 | mlog_errno(rc); | |
399ff3a7 JB |
2158 | ocfs2_xa_cleanup_value_truncate(loc, |
2159 | "overwriting", | |
2160 | orig_clusters); | |
73857ee0 JB |
2161 | goto out; |
2162 | } | |
2163 | } | |
69a3e539 JB |
2164 | ocfs2_xa_wipe_namevalue(loc); |
2165 | } else | |
2166 | ocfs2_xa_add_entry(loc, name_hash); | |
2167 | ||
2168 | /* | |
2169 | * If we get here, we have a blank entry. Fill it. We grow our | |
2170 | * name+value pair back from the end. | |
2171 | */ | |
2172 | ocfs2_xa_add_namevalue(loc, xi); | |
73857ee0 JB |
2173 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
2174 | ocfs2_xa_install_value_root(loc); | |
2175 | ||
2176 | alloc_value: | |
2177 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { | |
399ff3a7 | 2178 | orig_clusters = ocfs2_xa_value_clusters(loc); |
73857ee0 | 2179 | rc = ocfs2_xa_value_truncate(loc, xi->xi_value_len, ctxt); |
399ff3a7 | 2180 | if (rc < 0) { |
5f5261ac | 2181 | ctxt->set_abort = 1; |
399ff3a7 JB |
2182 | ocfs2_xa_cleanup_value_truncate(loc, "growing", |
2183 | orig_clusters); | |
d5a7df06 TM |
2184 | /* |
2185 | * If we were growing an existing value, | |
2186 | * ocfs2_xa_cleanup_value_truncate() won't remove | |
2187 | * the entry. We need to restore the original value | |
2188 | * size. | |
2189 | */ | |
2190 | if (loc->xl_entry) { | |
2191 | BUG_ON(!orig_value_size); | |
2192 | loc->xl_entry->xe_value_size = orig_value_size; | |
2193 | } | |
73857ee0 | 2194 | mlog_errno(rc); |
399ff3a7 | 2195 | } |
73857ee0 | 2196 | } |
69a3e539 JB |
2197 | |
2198 | out: | |
2199 | return rc; | |
2200 | } | |
2201 | ||
2202 | /* | |
73857ee0 JB |
2203 | * Store the value portion of the name+value pair. This will skip |
2204 | * values that are stored externally. Their tree roots were set up | |
2205 | * by ocfs2_xa_prepare_entry(). | |
69a3e539 | 2206 | */ |
73857ee0 JB |
2207 | static int ocfs2_xa_store_value(struct ocfs2_xa_loc *loc, |
2208 | struct ocfs2_xattr_info *xi, | |
2209 | struct ocfs2_xattr_set_ctxt *ctxt) | |
69a3e539 | 2210 | { |
73857ee0 | 2211 | int rc = 0; |
69a3e539 JB |
2212 | int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset); |
2213 | int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len); | |
69a3e539 | 2214 | char *nameval_buf; |
73857ee0 | 2215 | struct ocfs2_xattr_value_buf vb; |
69a3e539 | 2216 | |
69a3e539 | 2217 | nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset); |
73857ee0 JB |
2218 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
2219 | ocfs2_xa_fill_value_buf(loc, &vb); | |
2220 | rc = __ocfs2_xattr_set_value_outside(loc->xl_inode, | |
2221 | ctxt->handle, &vb, | |
2222 | xi->xi_value, | |
2223 | xi->xi_value_len); | |
2224 | } else | |
2225 | memcpy(nameval_buf + name_size, xi->xi_value, xi->xi_value_len); | |
2226 | ||
73857ee0 | 2227 | return rc; |
69a3e539 JB |
2228 | } |
2229 | ||
bca5e9bd JB |
2230 | static int ocfs2_xa_set(struct ocfs2_xa_loc *loc, |
2231 | struct ocfs2_xattr_info *xi, | |
2232 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2233 | { | |
2234 | int ret; | |
2235 | u32 name_hash = ocfs2_xattr_name_hash(loc->xl_inode, xi->xi_name, | |
2236 | xi->xi_name_len); | |
2237 | ||
2238 | ret = ocfs2_xa_journal_access(ctxt->handle, loc, | |
2239 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2240 | if (ret) { | |
2241 | mlog_errno(ret); | |
2242 | goto out; | |
2243 | } | |
2244 | ||
399ff3a7 JB |
2245 | /* |
2246 | * From here on out, everything is going to modify the buffer a | |
2247 | * little. Errors are going to leave the xattr header in a | |
2248 | * sane state. Thus, even with errors we dirty the sucker. | |
2249 | */ | |
2250 | ||
bca5e9bd JB |
2251 | /* Don't worry, we are never called with !xi_value and !xl_entry */ |
2252 | if (!xi->xi_value) { | |
2253 | ret = ocfs2_xa_remove(loc, ctxt); | |
399ff3a7 | 2254 | goto out_dirty; |
bca5e9bd JB |
2255 | } |
2256 | ||
2257 | ret = ocfs2_xa_prepare_entry(loc, xi, name_hash, ctxt); | |
2258 | if (ret) { | |
2259 | if (ret != -ENOSPC) | |
2260 | mlog_errno(ret); | |
399ff3a7 | 2261 | goto out_dirty; |
bca5e9bd JB |
2262 | } |
2263 | ||
2264 | ret = ocfs2_xa_store_value(loc, xi, ctxt); | |
399ff3a7 | 2265 | if (ret) |
bca5e9bd | 2266 | mlog_errno(ret); |
bca5e9bd | 2267 | |
399ff3a7 | 2268 | out_dirty: |
bca5e9bd JB |
2269 | ocfs2_xa_journal_dirty(ctxt->handle, loc); |
2270 | ||
2271 | out: | |
2272 | return ret; | |
2273 | } | |
2274 | ||
11179f2c JB |
2275 | static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc, |
2276 | struct inode *inode, | |
2277 | struct buffer_head *bh, | |
2278 | struct ocfs2_xattr_entry *entry) | |
2279 | { | |
2280 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data; | |
2281 | ||
139fface JB |
2282 | BUG_ON(!(OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_XATTR_FL)); |
2283 | ||
cf2bc809 | 2284 | loc->xl_inode = inode; |
11179f2c JB |
2285 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2286 | loc->xl_storage = bh; | |
2287 | loc->xl_entry = entry; | |
139fface | 2288 | loc->xl_size = le16_to_cpu(di->i_xattr_inline_size); |
11179f2c JB |
2289 | loc->xl_header = |
2290 | (struct ocfs2_xattr_header *)(bh->b_data + bh->b_size - | |
2291 | loc->xl_size); | |
2292 | } | |
2293 | ||
2294 | static void ocfs2_init_xattr_block_xa_loc(struct ocfs2_xa_loc *loc, | |
cf2bc809 | 2295 | struct inode *inode, |
11179f2c JB |
2296 | struct buffer_head *bh, |
2297 | struct ocfs2_xattr_entry *entry) | |
2298 | { | |
2299 | struct ocfs2_xattr_block *xb = | |
2300 | (struct ocfs2_xattr_block *)bh->b_data; | |
2301 | ||
2302 | BUG_ON(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED); | |
2303 | ||
cf2bc809 | 2304 | loc->xl_inode = inode; |
11179f2c JB |
2305 | loc->xl_ops = &ocfs2_xa_block_loc_ops; |
2306 | loc->xl_storage = bh; | |
2307 | loc->xl_header = &(xb->xb_attrs.xb_header); | |
2308 | loc->xl_entry = entry; | |
2309 | loc->xl_size = bh->b_size - offsetof(struct ocfs2_xattr_block, | |
2310 | xb_attrs.xb_header); | |
2311 | } | |
2312 | ||
2313 | static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc, | |
2314 | struct ocfs2_xattr_bucket *bucket, | |
2315 | struct ocfs2_xattr_entry *entry) | |
2316 | { | |
cf2bc809 | 2317 | loc->xl_inode = bucket->bu_inode; |
11179f2c JB |
2318 | loc->xl_ops = &ocfs2_xa_bucket_loc_ops; |
2319 | loc->xl_storage = bucket; | |
2320 | loc->xl_header = bucket_xh(bucket); | |
2321 | loc->xl_entry = entry; | |
2322 | loc->xl_size = OCFS2_XATTR_BUCKET_SIZE; | |
2323 | } | |
2324 | ||
ce9c5a54 TM |
2325 | /* |
2326 | * In xattr remove, if it is stored outside and refcounted, we may have | |
2327 | * the chance to split the refcount tree. So need the allocators. | |
2328 | */ | |
2329 | static int ocfs2_lock_xattr_remove_allocators(struct inode *inode, | |
2330 | struct ocfs2_xattr_value_root *xv, | |
2331 | struct ocfs2_caching_info *ref_ci, | |
2332 | struct buffer_head *ref_root_bh, | |
2333 | struct ocfs2_alloc_context **meta_ac, | |
2334 | int *ref_credits) | |
2335 | { | |
2336 | int ret, meta_add = 0; | |
2337 | u32 p_cluster, num_clusters; | |
2338 | unsigned int ext_flags; | |
2339 | ||
2340 | *ref_credits = 0; | |
2341 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
2342 | &num_clusters, | |
2343 | &xv->xr_list, | |
2344 | &ext_flags); | |
2345 | if (ret) { | |
2346 | mlog_errno(ret); | |
2347 | goto out; | |
2348 | } | |
2349 | ||
2350 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
2351 | goto out; | |
2352 | ||
2353 | ret = ocfs2_refcounted_xattr_delete_need(inode, ref_ci, | |
2354 | ref_root_bh, xv, | |
2355 | &meta_add, ref_credits); | |
2356 | if (ret) { | |
2357 | mlog_errno(ret); | |
2358 | goto out; | |
2359 | } | |
2360 | ||
2361 | ret = ocfs2_reserve_new_metadata_blocks(OCFS2_SB(inode->i_sb), | |
2362 | meta_add, meta_ac); | |
2363 | if (ret) | |
2364 | mlog_errno(ret); | |
2365 | ||
2366 | out: | |
2367 | return ret; | |
2368 | } | |
2369 | ||
cf1d6c76 | 2370 | static int ocfs2_remove_value_outside(struct inode*inode, |
4311901d | 2371 | struct ocfs2_xattr_value_buf *vb, |
ce9c5a54 TM |
2372 | struct ocfs2_xattr_header *header, |
2373 | struct ocfs2_caching_info *ref_ci, | |
2374 | struct buffer_head *ref_root_bh) | |
cf1d6c76 | 2375 | { |
ce9c5a54 | 2376 | int ret = 0, i, ref_credits; |
78f30c31 TM |
2377 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
2378 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; | |
ce9c5a54 | 2379 | void *val; |
78f30c31 TM |
2380 | |
2381 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
cf1d6c76 TY |
2382 | |
2383 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
2384 | struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
2385 | ||
ce9c5a54 TM |
2386 | if (ocfs2_xattr_is_local(entry)) |
2387 | continue; | |
cf1d6c76 | 2388 | |
ce9c5a54 TM |
2389 | val = (void *)header + |
2390 | le16_to_cpu(entry->xe_name_offset); | |
2391 | vb->vb_xv = (struct ocfs2_xattr_value_root *) | |
2392 | (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
2393 | ||
2394 | ret = ocfs2_lock_xattr_remove_allocators(inode, vb->vb_xv, | |
2395 | ref_ci, ref_root_bh, | |
2396 | &ctxt.meta_ac, | |
2397 | &ref_credits); | |
2398 | ||
2399 | ctxt.handle = ocfs2_start_trans(osb, ref_credits + | |
2400 | ocfs2_remove_extent_credits(osb->sb)); | |
2401 | if (IS_ERR(ctxt.handle)) { | |
2402 | ret = PTR_ERR(ctxt.handle); | |
2403 | mlog_errno(ret); | |
2404 | break; | |
2405 | } | |
2406 | ||
2407 | ret = ocfs2_xattr_value_truncate(inode, vb, 0, &ctxt); | |
ce9c5a54 TM |
2408 | |
2409 | ocfs2_commit_trans(osb, ctxt.handle); | |
2410 | if (ctxt.meta_ac) { | |
2411 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
2412 | ctxt.meta_ac = NULL; | |
cf1d6c76 | 2413 | } |
b8a0ae57 WW |
2414 | |
2415 | if (ret < 0) { | |
2416 | mlog_errno(ret); | |
2417 | break; | |
2418 | } | |
2419 | ||
cf1d6c76 TY |
2420 | } |
2421 | ||
ce9c5a54 TM |
2422 | if (ctxt.meta_ac) |
2423 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
2424 | ocfs2_schedule_truncate_log_flush(osb, 1); |
2425 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
cf1d6c76 TY |
2426 | return ret; |
2427 | } | |
2428 | ||
2429 | static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
ce9c5a54 TM |
2430 | struct buffer_head *di_bh, |
2431 | struct ocfs2_caching_info *ref_ci, | |
2432 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2433 | { |
2434 | ||
2435 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2436 | struct ocfs2_xattr_header *header; | |
2437 | int ret; | |
4311901d JB |
2438 | struct ocfs2_xattr_value_buf vb = { |
2439 | .vb_bh = di_bh, | |
2440 | .vb_access = ocfs2_journal_access_di, | |
2441 | }; | |
cf1d6c76 TY |
2442 | |
2443 | header = (struct ocfs2_xattr_header *) | |
2444 | ((void *)di + inode->i_sb->s_blocksize - | |
2445 | le16_to_cpu(di->i_xattr_inline_size)); | |
2446 | ||
ce9c5a54 TM |
2447 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2448 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2449 | |
2450 | return ret; | |
2451 | } | |
2452 | ||
ce9c5a54 TM |
2453 | struct ocfs2_rm_xattr_bucket_para { |
2454 | struct ocfs2_caching_info *ref_ci; | |
2455 | struct buffer_head *ref_root_bh; | |
2456 | }; | |
2457 | ||
cf1d6c76 | 2458 | static int ocfs2_xattr_block_remove(struct inode *inode, |
ce9c5a54 TM |
2459 | struct buffer_head *blk_bh, |
2460 | struct ocfs2_caching_info *ref_ci, | |
2461 | struct buffer_head *ref_root_bh) | |
cf1d6c76 TY |
2462 | { |
2463 | struct ocfs2_xattr_block *xb; | |
cf1d6c76 | 2464 | int ret = 0; |
4311901d JB |
2465 | struct ocfs2_xattr_value_buf vb = { |
2466 | .vb_bh = blk_bh, | |
2467 | .vb_access = ocfs2_journal_access_xb, | |
2468 | }; | |
ce9c5a54 TM |
2469 | struct ocfs2_rm_xattr_bucket_para args = { |
2470 | .ref_ci = ref_ci, | |
2471 | .ref_root_bh = ref_root_bh, | |
2472 | }; | |
cf1d6c76 TY |
2473 | |
2474 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
a3944256 TM |
2475 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { |
2476 | struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); | |
ce9c5a54 TM |
2477 | ret = ocfs2_remove_value_outside(inode, &vb, header, |
2478 | ref_ci, ref_root_bh); | |
a3944256 | 2479 | } else |
47bca495 TM |
2480 | ret = ocfs2_iterate_xattr_index_block(inode, |
2481 | blk_bh, | |
2482 | ocfs2_rm_xattr_cluster, | |
ce9c5a54 | 2483 | &args); |
cf1d6c76 TY |
2484 | |
2485 | return ret; | |
2486 | } | |
2487 | ||
08413899 | 2488 | static int ocfs2_xattr_free_block(struct inode *inode, |
ce9c5a54 TM |
2489 | u64 block, |
2490 | struct ocfs2_caching_info *ref_ci, | |
2491 | struct buffer_head *ref_root_bh) | |
08413899 TM |
2492 | { |
2493 | struct inode *xb_alloc_inode; | |
2494 | struct buffer_head *xb_alloc_bh = NULL; | |
2495 | struct buffer_head *blk_bh = NULL; | |
2496 | struct ocfs2_xattr_block *xb; | |
2497 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2498 | handle_t *handle; | |
2499 | int ret = 0; | |
2500 | u64 blk, bg_blkno; | |
2501 | u16 bit; | |
2502 | ||
4ae1d69b | 2503 | ret = ocfs2_read_xattr_block(inode, block, &blk_bh); |
08413899 TM |
2504 | if (ret < 0) { |
2505 | mlog_errno(ret); | |
2506 | goto out; | |
2507 | } | |
2508 | ||
ce9c5a54 | 2509 | ret = ocfs2_xattr_block_remove(inode, blk_bh, ref_ci, ref_root_bh); |
08413899 TM |
2510 | if (ret < 0) { |
2511 | mlog_errno(ret); | |
2512 | goto out; | |
2513 | } | |
2514 | ||
4ae1d69b | 2515 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
08413899 TM |
2516 | blk = le64_to_cpu(xb->xb_blkno); |
2517 | bit = le16_to_cpu(xb->xb_suballoc_bit); | |
74380c47 TM |
2518 | if (xb->xb_suballoc_loc) |
2519 | bg_blkno = le64_to_cpu(xb->xb_suballoc_loc); | |
2520 | else | |
2521 | bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
08413899 TM |
2522 | |
2523 | xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
2524 | EXTENT_ALLOC_SYSTEM_INODE, | |
2525 | le16_to_cpu(xb->xb_suballoc_slot)); | |
2526 | if (!xb_alloc_inode) { | |
2527 | ret = -ENOMEM; | |
2528 | mlog_errno(ret); | |
2529 | goto out; | |
2530 | } | |
5955102c | 2531 | inode_lock(xb_alloc_inode); |
08413899 TM |
2532 | |
2533 | ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
2534 | if (ret < 0) { | |
2535 | mlog_errno(ret); | |
2536 | goto out_mutex; | |
2537 | } | |
2538 | ||
2539 | handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); | |
2540 | if (IS_ERR(handle)) { | |
2541 | ret = PTR_ERR(handle); | |
2542 | mlog_errno(ret); | |
2543 | goto out_unlock; | |
2544 | } | |
2545 | ||
2546 | ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
2547 | bit, bg_blkno, 1); | |
2548 | if (ret < 0) | |
2549 | mlog_errno(ret); | |
2550 | ||
2551 | ocfs2_commit_trans(osb, handle); | |
2552 | out_unlock: | |
2553 | ocfs2_inode_unlock(xb_alloc_inode, 1); | |
2554 | brelse(xb_alloc_bh); | |
2555 | out_mutex: | |
5955102c | 2556 | inode_unlock(xb_alloc_inode); |
08413899 TM |
2557 | iput(xb_alloc_inode); |
2558 | out: | |
2559 | brelse(blk_bh); | |
2560 | return ret; | |
2561 | } | |
2562 | ||
cf1d6c76 TY |
2563 | /* |
2564 | * ocfs2_xattr_remove() | |
2565 | * | |
2566 | * Free extended attribute resources associated with this inode. | |
2567 | */ | |
2568 | int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
2569 | { | |
cf1d6c76 TY |
2570 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
2571 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
ce9c5a54 TM |
2572 | struct ocfs2_refcount_tree *ref_tree = NULL; |
2573 | struct buffer_head *ref_root_bh = NULL; | |
2574 | struct ocfs2_caching_info *ref_ci = NULL; | |
cf1d6c76 TY |
2575 | handle_t *handle; |
2576 | int ret; | |
2577 | ||
8154da3d TY |
2578 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
2579 | return 0; | |
2580 | ||
cf1d6c76 TY |
2581 | if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) |
2582 | return 0; | |
2583 | ||
84e40080 | 2584 | if (ocfs2_is_refcount_inode(inode)) { |
ce9c5a54 TM |
2585 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(inode->i_sb), |
2586 | le64_to_cpu(di->i_refcount_loc), | |
2587 | 1, &ref_tree, &ref_root_bh); | |
2588 | if (ret) { | |
2589 | mlog_errno(ret); | |
2590 | goto out; | |
2591 | } | |
2592 | ref_ci = &ref_tree->rf_ci; | |
2593 | ||
2594 | } | |
2595 | ||
cf1d6c76 | 2596 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
ce9c5a54 TM |
2597 | ret = ocfs2_xattr_ibody_remove(inode, di_bh, |
2598 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2599 | if (ret < 0) { |
2600 | mlog_errno(ret); | |
2601 | goto out; | |
2602 | } | |
2603 | } | |
cf1d6c76 | 2604 | |
08413899 TM |
2605 | if (di->i_xattr_loc) { |
2606 | ret = ocfs2_xattr_free_block(inode, | |
ce9c5a54 TM |
2607 | le64_to_cpu(di->i_xattr_loc), |
2608 | ref_ci, ref_root_bh); | |
cf1d6c76 TY |
2609 | if (ret < 0) { |
2610 | mlog_errno(ret); | |
2611 | goto out; | |
2612 | } | |
2613 | } | |
2614 | ||
2615 | handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
2616 | OCFS2_INODE_UPDATE_CREDITS); | |
2617 | if (IS_ERR(handle)) { | |
2618 | ret = PTR_ERR(handle); | |
2619 | mlog_errno(ret); | |
2620 | goto out; | |
2621 | } | |
0cf2f763 | 2622 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, |
84008972 | 2623 | OCFS2_JOURNAL_ACCESS_WRITE); |
cf1d6c76 TY |
2624 | if (ret) { |
2625 | mlog_errno(ret); | |
2626 | goto out_commit; | |
2627 | } | |
2628 | ||
08413899 | 2629 | di->i_xattr_loc = 0; |
cf1d6c76 TY |
2630 | |
2631 | spin_lock(&oi->ip_lock); | |
2632 | oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
2633 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2634 | spin_unlock(&oi->ip_lock); | |
6fdb702d | 2635 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
cf1d6c76 | 2636 | |
ec20cec7 | 2637 | ocfs2_journal_dirty(handle, di_bh); |
cf1d6c76 TY |
2638 | out_commit: |
2639 | ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
2640 | out: | |
ce9c5a54 TM |
2641 | if (ref_tree) |
2642 | ocfs2_unlock_refcount_tree(OCFS2_SB(inode->i_sb), ref_tree, 1); | |
2643 | brelse(ref_root_bh); | |
cf1d6c76 TY |
2644 | return ret; |
2645 | } | |
2646 | ||
2647 | static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
2648 | struct ocfs2_dinode *di) | |
2649 | { | |
2650 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2651 | unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
2652 | int free; | |
2653 | ||
2654 | if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
2655 | return 0; | |
2656 | ||
2657 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2658 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2659 | free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
2660 | } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
2661 | free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
2662 | le64_to_cpu(di->i_size); | |
2663 | } else { | |
2664 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2665 | free = (le16_to_cpu(el->l_count) - | |
2666 | le16_to_cpu(el->l_next_free_rec)) * | |
2667 | sizeof(struct ocfs2_extent_rec); | |
2668 | } | |
2669 | if (free >= xattrsize) | |
2670 | return 1; | |
2671 | ||
2672 | return 0; | |
2673 | } | |
2674 | ||
2675 | /* | |
2676 | * ocfs2_xattr_ibody_find() | |
2677 | * | |
2678 | * Find extended attribute in inode block and | |
2679 | * fill search info into struct ocfs2_xattr_search. | |
2680 | */ | |
2681 | static int ocfs2_xattr_ibody_find(struct inode *inode, | |
2682 | int name_index, | |
2683 | const char *name, | |
2684 | struct ocfs2_xattr_search *xs) | |
2685 | { | |
2686 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2687 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2688 | int ret; | |
2689 | int has_space = 0; | |
2690 | ||
2691 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2692 | return 0; | |
2693 | ||
2694 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
2695 | down_read(&oi->ip_alloc_sem); | |
2696 | has_space = ocfs2_xattr_has_space_inline(inode, di); | |
2697 | up_read(&oi->ip_alloc_sem); | |
2698 | if (!has_space) | |
2699 | return 0; | |
2700 | } | |
2701 | ||
2702 | xs->xattr_bh = xs->inode_bh; | |
2703 | xs->end = (void *)di + inode->i_sb->s_blocksize; | |
2704 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
2705 | xs->header = (struct ocfs2_xattr_header *) | |
2706 | (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
2707 | else | |
2708 | xs->header = (struct ocfs2_xattr_header *) | |
2709 | (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
2710 | xs->base = (void *)xs->header; | |
2711 | xs->here = xs->header->xh_entries; | |
2712 | ||
2713 | /* Find the named attribute. */ | |
2714 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
2715 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2716 | if (ret && ret != -ENODATA) | |
2717 | return ret; | |
2718 | xs->not_found = ret; | |
2719 | } | |
2720 | ||
2721 | return 0; | |
2722 | } | |
2723 | ||
139fface JB |
2724 | static int ocfs2_xattr_ibody_init(struct inode *inode, |
2725 | struct buffer_head *di_bh, | |
2726 | struct ocfs2_xattr_set_ctxt *ctxt) | |
2727 | { | |
2728 | int ret; | |
2729 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
2730 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
2731 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2732 | unsigned int xattrsize = osb->s_xattr_inline_size; | |
2733 | ||
2734 | if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
2735 | ret = -ENOSPC; | |
2736 | goto out; | |
2737 | } | |
2738 | ||
2739 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), di_bh, | |
2740 | OCFS2_JOURNAL_ACCESS_WRITE); | |
2741 | if (ret) { | |
2742 | mlog_errno(ret); | |
2743 | goto out; | |
2744 | } | |
2745 | ||
2746 | /* | |
2747 | * Adjust extent record count or inline data size | |
2748 | * to reserve space for extended attribute. | |
2749 | */ | |
2750 | if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
2751 | struct ocfs2_inline_data *idata = &di->id2.i_data; | |
2752 | le16_add_cpu(&idata->id_count, -xattrsize); | |
2753 | } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
2754 | struct ocfs2_extent_list *el = &di->id2.i_list; | |
2755 | le16_add_cpu(&el->l_count, -(xattrsize / | |
2756 | sizeof(struct ocfs2_extent_rec))); | |
2757 | } | |
2758 | di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
2759 | ||
2760 | spin_lock(&oi->ip_lock); | |
2761 | oi->ip_dyn_features |= OCFS2_INLINE_XATTR_FL|OCFS2_HAS_XATTR_FL; | |
2762 | di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
2763 | spin_unlock(&oi->ip_lock); | |
2764 | ||
ec20cec7 | 2765 | ocfs2_journal_dirty(ctxt->handle, di_bh); |
139fface JB |
2766 | |
2767 | out: | |
2768 | return ret; | |
2769 | } | |
2770 | ||
cf1d6c76 TY |
2771 | /* |
2772 | * ocfs2_xattr_ibody_set() | |
2773 | * | |
2774 | * Set, replace or remove an extended attribute into inode block. | |
2775 | * | |
2776 | */ | |
2777 | static int ocfs2_xattr_ibody_set(struct inode *inode, | |
2778 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2779 | struct ocfs2_xattr_search *xs, |
2780 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 | 2781 | { |
139fface | 2782 | int ret; |
cf1d6c76 | 2783 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
139fface | 2784 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2785 | |
2786 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
2787 | return -ENOSPC; | |
2788 | ||
2789 | down_write(&oi->ip_alloc_sem); | |
139fface JB |
2790 | if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
2791 | ret = ocfs2_xattr_ibody_init(inode, xs->inode_bh, ctxt); | |
2792 | if (ret) { | |
2793 | if (ret != -ENOSPC) | |
2794 | mlog_errno(ret); | |
2795 | goto out; | |
2796 | } | |
2797 | } | |
2798 | ||
2799 | ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh, | |
2800 | xs->not_found ? NULL : xs->here); | |
2801 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
2802 | if (ret) { | |
2803 | if (ret != -ENOSPC) | |
2804 | mlog_errno(ret); | |
2805 | goto out; | |
2806 | } | |
2807 | xs->here = loc.xl_entry; | |
2808 | ||
cf1d6c76 TY |
2809 | out: |
2810 | up_write(&oi->ip_alloc_sem); | |
2811 | ||
2812 | return ret; | |
2813 | } | |
2814 | ||
2815 | /* | |
2816 | * ocfs2_xattr_block_find() | |
2817 | * | |
2818 | * Find extended attribute in external block and | |
2819 | * fill search info into struct ocfs2_xattr_search. | |
2820 | */ | |
2821 | static int ocfs2_xattr_block_find(struct inode *inode, | |
2822 | int name_index, | |
2823 | const char *name, | |
2824 | struct ocfs2_xattr_search *xs) | |
2825 | { | |
2826 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
2827 | struct buffer_head *blk_bh = NULL; | |
589dc260 | 2828 | struct ocfs2_xattr_block *xb; |
cf1d6c76 TY |
2829 | int ret = 0; |
2830 | ||
2831 | if (!di->i_xattr_loc) | |
2832 | return ret; | |
2833 | ||
4ae1d69b JB |
2834 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), |
2835 | &blk_bh); | |
cf1d6c76 TY |
2836 | if (ret < 0) { |
2837 | mlog_errno(ret); | |
2838 | return ret; | |
2839 | } | |
f6087fb7 | 2840 | |
cf1d6c76 | 2841 | xs->xattr_bh = blk_bh; |
4ae1d69b | 2842 | xb = (struct ocfs2_xattr_block *)blk_bh->b_data; |
589dc260 TM |
2843 | |
2844 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
2845 | xs->header = &xb->xb_attrs.xb_header; | |
2846 | xs->base = (void *)xs->header; | |
2847 | xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
2848 | xs->here = xs->header->xh_entries; | |
2849 | ||
2850 | ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
2851 | } else | |
2852 | ret = ocfs2_xattr_index_block_find(inode, blk_bh, | |
2853 | name_index, | |
2854 | name, xs); | |
cf1d6c76 | 2855 | |
cf1d6c76 TY |
2856 | if (ret && ret != -ENODATA) { |
2857 | xs->xattr_bh = NULL; | |
2858 | goto cleanup; | |
2859 | } | |
2860 | xs->not_found = ret; | |
2861 | return 0; | |
cf1d6c76 TY |
2862 | cleanup: |
2863 | brelse(blk_bh); | |
2864 | ||
2865 | return ret; | |
2866 | } | |
2867 | ||
d3981544 | 2868 | static int ocfs2_create_xattr_block(struct inode *inode, |
5aea1f0e | 2869 | struct buffer_head *inode_bh, |
d3981544 JB |
2870 | struct ocfs2_xattr_set_ctxt *ctxt, |
2871 | int indexed, | |
2872 | struct buffer_head **ret_bh) | |
5aea1f0e TM |
2873 | { |
2874 | int ret; | |
2875 | u16 suballoc_bit_start; | |
2876 | u32 num_got; | |
2b6cb576 | 2877 | u64 suballoc_loc, first_blkno; |
5aea1f0e | 2878 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data; |
5aea1f0e TM |
2879 | struct buffer_head *new_bh = NULL; |
2880 | struct ocfs2_xattr_block *xblk; | |
2881 | ||
d3981544 JB |
2882 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
2883 | inode_bh, OCFS2_JOURNAL_ACCESS_CREATE); | |
5aea1f0e TM |
2884 | if (ret < 0) { |
2885 | mlog_errno(ret); | |
2886 | goto end; | |
2887 | } | |
2888 | ||
1ed9b777 | 2889 | ret = ocfs2_claim_metadata(ctxt->handle, ctxt->meta_ac, 1, |
2b6cb576 JB |
2890 | &suballoc_loc, &suballoc_bit_start, |
2891 | &num_got, &first_blkno); | |
5aea1f0e TM |
2892 | if (ret < 0) { |
2893 | mlog_errno(ret); | |
2894 | goto end; | |
2895 | } | |
2896 | ||
2897 | new_bh = sb_getblk(inode->i_sb, first_blkno); | |
58796207 RX |
2898 | if (!new_bh) { |
2899 | ret = -ENOMEM; | |
2900 | mlog_errno(ret); | |
2901 | goto end; | |
2902 | } | |
2903 | ||
5aea1f0e TM |
2904 | ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh); |
2905 | ||
d3981544 | 2906 | ret = ocfs2_journal_access_xb(ctxt->handle, INODE_CACHE(inode), |
5aea1f0e TM |
2907 | new_bh, |
2908 | OCFS2_JOURNAL_ACCESS_CREATE); | |
2909 | if (ret < 0) { | |
2910 | mlog_errno(ret); | |
2911 | goto end; | |
2912 | } | |
2913 | ||
2914 | /* Initialize ocfs2_xattr_block */ | |
2915 | xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
2916 | memset(xblk, 0, inode->i_sb->s_blocksize); | |
2917 | strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
d3981544 | 2918 | xblk->xb_suballoc_slot = cpu_to_le16(ctxt->meta_ac->ac_alloc_slot); |
2b6cb576 | 2919 | xblk->xb_suballoc_loc = cpu_to_le64(suballoc_loc); |
5aea1f0e | 2920 | xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
1ed9b777 JB |
2921 | xblk->xb_fs_generation = |
2922 | cpu_to_le32(OCFS2_SB(inode->i_sb)->fs_generation); | |
5aea1f0e | 2923 | xblk->xb_blkno = cpu_to_le64(first_blkno); |
a7fe7a3a TM |
2924 | if (indexed) { |
2925 | struct ocfs2_xattr_tree_root *xr = &xblk->xb_attrs.xb_root; | |
2926 | xr->xt_clusters = cpu_to_le32(1); | |
2927 | xr->xt_last_eb_blk = 0; | |
2928 | xr->xt_list.l_tree_depth = 0; | |
2929 | xr->xt_list.l_count = cpu_to_le16( | |
2930 | ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
2931 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
2932 | xblk->xb_flags = cpu_to_le16(OCFS2_XATTR_INDEXED); | |
2933 | } | |
d3981544 | 2934 | ocfs2_journal_dirty(ctxt->handle, new_bh); |
a7fe7a3a | 2935 | |
d3981544 | 2936 | /* Add it to the inode */ |
5aea1f0e | 2937 | di->i_xattr_loc = cpu_to_le64(first_blkno); |
d3981544 JB |
2938 | |
2939 | spin_lock(&OCFS2_I(inode)->ip_lock); | |
2940 | OCFS2_I(inode)->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
2941 | di->i_dyn_features = cpu_to_le16(OCFS2_I(inode)->ip_dyn_features); | |
2942 | spin_unlock(&OCFS2_I(inode)->ip_lock); | |
2943 | ||
2944 | ocfs2_journal_dirty(ctxt->handle, inode_bh); | |
5aea1f0e TM |
2945 | |
2946 | *ret_bh = new_bh; | |
2947 | new_bh = NULL; | |
2948 | ||
2949 | end: | |
2950 | brelse(new_bh); | |
2951 | return ret; | |
2952 | } | |
2953 | ||
cf1d6c76 TY |
2954 | /* |
2955 | * ocfs2_xattr_block_set() | |
2956 | * | |
2957 | * Set, replace or remove an extended attribute into external block. | |
2958 | * | |
2959 | */ | |
2960 | static int ocfs2_xattr_block_set(struct inode *inode, | |
2961 | struct ocfs2_xattr_info *xi, | |
78f30c31 TM |
2962 | struct ocfs2_xattr_search *xs, |
2963 | struct ocfs2_xattr_set_ctxt *ctxt) | |
cf1d6c76 TY |
2964 | { |
2965 | struct buffer_head *new_bh = NULL; | |
cf1d6c76 | 2966 | struct ocfs2_xattr_block *xblk = NULL; |
cf1d6c76 | 2967 | int ret; |
d3981544 | 2968 | struct ocfs2_xa_loc loc; |
cf1d6c76 TY |
2969 | |
2970 | if (!xs->xattr_bh) { | |
d3981544 JB |
2971 | ret = ocfs2_create_xattr_block(inode, xs->inode_bh, ctxt, |
2972 | 0, &new_bh); | |
5aea1f0e | 2973 | if (ret) { |
cf1d6c76 | 2974 | mlog_errno(ret); |
85db90e7 | 2975 | goto end; |
cf1d6c76 TY |
2976 | } |
2977 | ||
cf1d6c76 | 2978 | xs->xattr_bh = new_bh; |
5aea1f0e | 2979 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
cf1d6c76 TY |
2980 | xs->header = &xblk->xb_attrs.xb_header; |
2981 | xs->base = (void *)xs->header; | |
2982 | xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
2983 | xs->here = xs->header->xh_entries; | |
01225596 TM |
2984 | } else |
2985 | xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; | |
2986 | ||
2987 | if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
d3981544 JB |
2988 | ocfs2_init_xattr_block_xa_loc(&loc, inode, xs->xattr_bh, |
2989 | xs->not_found ? NULL : xs->here); | |
01225596 | 2990 | |
d3981544 JB |
2991 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
2992 | if (!ret) | |
2993 | xs->here = loc.xl_entry; | |
5f5261ac | 2994 | else if ((ret != -ENOSPC) || ctxt->set_abort) |
01225596 | 2995 | goto end; |
d3981544 JB |
2996 | else { |
2997 | ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); | |
2998 | if (ret) | |
2999 | goto end; | |
3000 | } | |
cf1d6c76 TY |
3001 | } |
3002 | ||
d3981544 JB |
3003 | if (le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED) |
3004 | ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); | |
01225596 TM |
3005 | |
3006 | end: | |
cf1d6c76 TY |
3007 | return ret; |
3008 | } | |
3009 | ||
78f30c31 TM |
3010 | /* Check whether the new xattr can be inserted into the inode. */ |
3011 | static int ocfs2_xattr_can_be_in_inode(struct inode *inode, | |
3012 | struct ocfs2_xattr_info *xi, | |
3013 | struct ocfs2_xattr_search *xs) | |
3014 | { | |
78f30c31 TM |
3015 | struct ocfs2_xattr_entry *last; |
3016 | int free, i; | |
3017 | size_t min_offs = xs->end - xs->base; | |
3018 | ||
3019 | if (!xs->header) | |
3020 | return 0; | |
3021 | ||
3022 | last = xs->header->xh_entries; | |
3023 | ||
3024 | for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
3025 | size_t offs = le16_to_cpu(last->xe_name_offset); | |
3026 | if (offs < min_offs) | |
3027 | min_offs = offs; | |
3028 | last += 1; | |
3029 | } | |
3030 | ||
4442f518 | 3031 | free = min_offs - ((void *)last - xs->base) - OCFS2_XATTR_HEADER_GAP; |
78f30c31 TM |
3032 | if (free < 0) |
3033 | return 0; | |
3034 | ||
3035 | BUG_ON(!xs->not_found); | |
3036 | ||
199799a3 | 3037 | if (free >= (sizeof(struct ocfs2_xattr_entry) + namevalue_size_xi(xi))) |
78f30c31 TM |
3038 | return 1; |
3039 | ||
3040 | return 0; | |
3041 | } | |
3042 | ||
3043 | static int ocfs2_calc_xattr_set_need(struct inode *inode, | |
3044 | struct ocfs2_dinode *di, | |
3045 | struct ocfs2_xattr_info *xi, | |
3046 | struct ocfs2_xattr_search *xis, | |
3047 | struct ocfs2_xattr_search *xbs, | |
3048 | int *clusters_need, | |
85db90e7 TM |
3049 | int *meta_need, |
3050 | int *credits_need) | |
78f30c31 TM |
3051 | { |
3052 | int ret = 0, old_in_xb = 0; | |
85db90e7 | 3053 | int clusters_add = 0, meta_add = 0, credits = 0; |
78f30c31 TM |
3054 | struct buffer_head *bh = NULL; |
3055 | struct ocfs2_xattr_block *xb = NULL; | |
3056 | struct ocfs2_xattr_entry *xe = NULL; | |
3057 | struct ocfs2_xattr_value_root *xv = NULL; | |
3058 | char *base = NULL; | |
3059 | int name_offset, name_len = 0; | |
3060 | u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
6b240ff6 | 3061 | xi->xi_value_len); |
78f30c31 TM |
3062 | u64 value_size; |
3063 | ||
71d548a6 TM |
3064 | /* |
3065 | * Calculate the clusters we need to write. | |
3066 | * No matter whether we replace an old one or add a new one, | |
3067 | * we need this for writing. | |
3068 | */ | |
6b240ff6 | 3069 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) |
71d548a6 TM |
3070 | credits += new_clusters * |
3071 | ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
3072 | ||
78f30c31 | 3073 | if (xis->not_found && xbs->not_found) { |
85db90e7 TM |
3074 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3075 | ||
6b240ff6 | 3076 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 | 3077 | clusters_add += new_clusters; |
85db90e7 | 3078 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3079 | &def_xv.xv.xr_list); |
85db90e7 | 3080 | } |
78f30c31 TM |
3081 | |
3082 | goto meta_guess; | |
3083 | } | |
3084 | ||
3085 | if (!xis->not_found) { | |
3086 | xe = xis->here; | |
3087 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3088 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3089 | base = xis->base; | |
85db90e7 | 3090 | credits += OCFS2_INODE_UPDATE_CREDITS; |
78f30c31 | 3091 | } else { |
970e4936 | 3092 | int i, block_off = 0; |
78f30c31 TM |
3093 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; |
3094 | xe = xbs->here; | |
3095 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
3096 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
3097 | i = xbs->here - xbs->header->xh_entries; | |
3098 | old_in_xb = 1; | |
3099 | ||
3100 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 3101 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
78f30c31 TM |
3102 | bucket_xh(xbs->bucket), |
3103 | i, &block_off, | |
3104 | &name_offset); | |
3105 | base = bucket_block(xbs->bucket, block_off); | |
85db90e7 TM |
3106 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
3107 | } else { | |
78f30c31 | 3108 | base = xbs->base; |
85db90e7 TM |
3109 | credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; |
3110 | } | |
3111 | } | |
3112 | ||
3113 | /* | |
3114 | * delete a xattr doesn't need metadata and cluster allocation. | |
3115 | * so just calculate the credits and return. | |
3116 | * | |
3117 | * The credits for removing the value tree will be extended | |
3118 | * by ocfs2_remove_extent itself. | |
3119 | */ | |
6b240ff6 | 3120 | if (!xi->xi_value) { |
85db90e7 | 3121 | if (!ocfs2_xattr_is_local(xe)) |
a90714c1 | 3122 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
85db90e7 TM |
3123 | |
3124 | goto out; | |
78f30c31 TM |
3125 | } |
3126 | ||
3127 | /* do cluster allocation guess first. */ | |
3128 | value_size = le64_to_cpu(xe->xe_value_size); | |
3129 | ||
3130 | if (old_in_xb) { | |
3131 | /* | |
3132 | * In xattr set, we always try to set the xe in inode first, | |
3133 | * so if it can be inserted into inode successfully, the old | |
3134 | * one will be removed from the xattr block, and this xattr | |
3135 | * will be inserted into inode as a new xattr in inode. | |
3136 | */ | |
3137 | if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { | |
3138 | clusters_add += new_clusters; | |
a90714c1 | 3139 | credits += ocfs2_remove_extent_credits(inode->i_sb) + |
85db90e7 TM |
3140 | OCFS2_INODE_UPDATE_CREDITS; |
3141 | if (!ocfs2_xattr_is_local(xe)) | |
3142 | credits += ocfs2_calc_extend_credits( | |
3143 | inode->i_sb, | |
06f9da6e | 3144 | &def_xv.xv.xr_list); |
78f30c31 TM |
3145 | goto out; |
3146 | } | |
3147 | } | |
3148 | ||
6b240ff6 | 3149 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
78f30c31 TM |
3150 | /* the new values will be stored outside. */ |
3151 | u32 old_clusters = 0; | |
3152 | ||
3153 | if (!ocfs2_xattr_is_local(xe)) { | |
3154 | old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, | |
3155 | value_size); | |
3156 | xv = (struct ocfs2_xattr_value_root *) | |
3157 | (base + name_offset + name_len); | |
97aff52a | 3158 | value_size = OCFS2_XATTR_ROOT_SIZE; |
78f30c31 TM |
3159 | } else |
3160 | xv = &def_xv.xv; | |
3161 | ||
85db90e7 | 3162 | if (old_clusters >= new_clusters) { |
a90714c1 | 3163 | credits += ocfs2_remove_extent_credits(inode->i_sb); |
78f30c31 | 3164 | goto out; |
85db90e7 | 3165 | } else { |
78f30c31 TM |
3166 | meta_add += ocfs2_extend_meta_needed(&xv->xr_list); |
3167 | clusters_add += new_clusters - old_clusters; | |
85db90e7 | 3168 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3169 | &xv->xr_list); |
97aff52a TM |
3170 | if (value_size >= OCFS2_XATTR_ROOT_SIZE) |
3171 | goto out; | |
78f30c31 TM |
3172 | } |
3173 | } else { | |
3174 | /* | |
3175 | * Now the new value will be stored inside. So if the new | |
3176 | * value is smaller than the size of value root or the old | |
3177 | * value, we don't need any allocation, otherwise we have | |
3178 | * to guess metadata allocation. | |
3179 | */ | |
6b240ff6 JB |
3180 | if ((ocfs2_xattr_is_local(xe) && |
3181 | (value_size >= xi->xi_value_len)) || | |
78f30c31 | 3182 | (!ocfs2_xattr_is_local(xe) && |
6b240ff6 | 3183 | OCFS2_XATTR_ROOT_SIZE >= xi->xi_value_len)) |
78f30c31 TM |
3184 | goto out; |
3185 | } | |
3186 | ||
3187 | meta_guess: | |
3188 | /* calculate metadata allocation. */ | |
3189 | if (di->i_xattr_loc) { | |
3190 | if (!xbs->xattr_bh) { | |
4ae1d69b JB |
3191 | ret = ocfs2_read_xattr_block(inode, |
3192 | le64_to_cpu(di->i_xattr_loc), | |
3193 | &bh); | |
78f30c31 TM |
3194 | if (ret) { |
3195 | mlog_errno(ret); | |
3196 | goto out; | |
3197 | } | |
3198 | ||
3199 | xb = (struct ocfs2_xattr_block *)bh->b_data; | |
3200 | } else | |
3201 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
3202 | ||
90cb546c TM |
3203 | /* |
3204 | * If there is already an xattr tree, good, we can calculate | |
3205 | * like other b-trees. Otherwise we may have the chance of | |
3206 | * create a tree, the credit calculation is borrowed from | |
3207 | * ocfs2_calc_extend_credits with root_el = NULL. And the | |
3208 | * new tree will be cluster based, so no meta is needed. | |
3209 | */ | |
78f30c31 TM |
3210 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
3211 | struct ocfs2_extent_list *el = | |
3212 | &xb->xb_attrs.xb_root.xt_list; | |
3213 | meta_add += ocfs2_extend_meta_needed(el); | |
85db90e7 | 3214 | credits += ocfs2_calc_extend_credits(inode->i_sb, |
06f9da6e | 3215 | el); |
90cb546c TM |
3216 | } else |
3217 | credits += OCFS2_SUBALLOC_ALLOC + 1; | |
78f30c31 TM |
3218 | |
3219 | /* | |
3220 | * This cluster will be used either for new bucket or for | |
3221 | * new xattr block. | |
3222 | * If the cluster size is the same as the bucket size, one | |
3223 | * more is needed since we may need to extend the bucket | |
3224 | * also. | |
3225 | */ | |
3226 | clusters_add += 1; | |
85db90e7 | 3227 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
78f30c31 | 3228 | if (OCFS2_XATTR_BUCKET_SIZE == |
85db90e7 TM |
3229 | OCFS2_SB(inode->i_sb)->s_clustersize) { |
3230 | credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
78f30c31 | 3231 | clusters_add += 1; |
85db90e7 TM |
3232 | } |
3233 | } else { | |
85db90e7 | 3234 | credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; |
3ed2be71 TS |
3235 | if (xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE) { |
3236 | struct ocfs2_extent_list *el = &def_xv.xv.xr_list; | |
3237 | meta_add += ocfs2_extend_meta_needed(el); | |
3238 | credits += ocfs2_calc_extend_credits(inode->i_sb, | |
3239 | el); | |
3240 | } else { | |
3241 | meta_add += 1; | |
3242 | } | |
85db90e7 | 3243 | } |
78f30c31 TM |
3244 | out: |
3245 | if (clusters_need) | |
3246 | *clusters_need = clusters_add; | |
3247 | if (meta_need) | |
3248 | *meta_need = meta_add; | |
85db90e7 TM |
3249 | if (credits_need) |
3250 | *credits_need = credits; | |
78f30c31 TM |
3251 | brelse(bh); |
3252 | return ret; | |
3253 | } | |
3254 | ||
3255 | static int ocfs2_init_xattr_set_ctxt(struct inode *inode, | |
3256 | struct ocfs2_dinode *di, | |
3257 | struct ocfs2_xattr_info *xi, | |
3258 | struct ocfs2_xattr_search *xis, | |
3259 | struct ocfs2_xattr_search *xbs, | |
85db90e7 | 3260 | struct ocfs2_xattr_set_ctxt *ctxt, |
492a8a33 | 3261 | int extra_meta, |
85db90e7 | 3262 | int *credits) |
78f30c31 TM |
3263 | { |
3264 | int clusters_add, meta_add, ret; | |
3265 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
3266 | ||
3267 | memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); | |
3268 | ||
3269 | ocfs2_init_dealloc_ctxt(&ctxt->dealloc); | |
3270 | ||
3271 | ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, | |
85db90e7 | 3272 | &clusters_add, &meta_add, credits); |
78f30c31 TM |
3273 | if (ret) { |
3274 | mlog_errno(ret); | |
3275 | return ret; | |
3276 | } | |
3277 | ||
492a8a33 | 3278 | meta_add += extra_meta; |
402b4183 TM |
3279 | trace_ocfs2_init_xattr_set_ctxt(xi->xi_name, meta_add, |
3280 | clusters_add, *credits); | |
78f30c31 TM |
3281 | |
3282 | if (meta_add) { | |
3283 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, | |
3284 | &ctxt->meta_ac); | |
3285 | if (ret) { | |
3286 | mlog_errno(ret); | |
3287 | goto out; | |
3288 | } | |
3289 | } | |
3290 | ||
3291 | if (clusters_add) { | |
3292 | ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); | |
3293 | if (ret) | |
3294 | mlog_errno(ret); | |
3295 | } | |
3296 | out: | |
3297 | if (ret) { | |
3298 | if (ctxt->meta_ac) { | |
3299 | ocfs2_free_alloc_context(ctxt->meta_ac); | |
3300 | ctxt->meta_ac = NULL; | |
3301 | } | |
3302 | ||
3303 | /* | |
3304 | * We cannot have an error and a non null ctxt->data_ac. | |
3305 | */ | |
3306 | } | |
3307 | ||
3308 | return ret; | |
3309 | } | |
3310 | ||
85db90e7 TM |
3311 | static int __ocfs2_xattr_set_handle(struct inode *inode, |
3312 | struct ocfs2_dinode *di, | |
3313 | struct ocfs2_xattr_info *xi, | |
3314 | struct ocfs2_xattr_search *xis, | |
3315 | struct ocfs2_xattr_search *xbs, | |
3316 | struct ocfs2_xattr_set_ctxt *ctxt) | |
3317 | { | |
9f868f16 | 3318 | int ret = 0, credits, old_found; |
85db90e7 | 3319 | |
6b240ff6 | 3320 | if (!xi->xi_value) { |
85db90e7 TM |
3321 | /* Remove existing extended attribute */ |
3322 | if (!xis->not_found) | |
3323 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3324 | else if (!xbs->not_found) | |
3325 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3326 | } else { | |
3327 | /* We always try to set extended attribute into inode first*/ | |
3328 | ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); | |
3329 | if (!ret && !xbs->not_found) { | |
3330 | /* | |
3331 | * If succeed and that extended attribute existing in | |
3332 | * external block, then we will remove it. | |
3333 | */ | |
6b240ff6 JB |
3334 | xi->xi_value = NULL; |
3335 | xi->xi_value_len = 0; | |
85db90e7 | 3336 | |
9f868f16 | 3337 | old_found = xis->not_found; |
85db90e7 TM |
3338 | xis->not_found = -ENODATA; |
3339 | ret = ocfs2_calc_xattr_set_need(inode, | |
3340 | di, | |
3341 | xi, | |
3342 | xis, | |
3343 | xbs, | |
3344 | NULL, | |
3345 | NULL, | |
3346 | &credits); | |
9f868f16 | 3347 | xis->not_found = old_found; |
85db90e7 TM |
3348 | if (ret) { |
3349 | mlog_errno(ret); | |
3350 | goto out; | |
3351 | } | |
3352 | ||
c901fb00 | 3353 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3354 | if (ret) { |
3355 | mlog_errno(ret); | |
3356 | goto out; | |
3357 | } | |
3358 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
5f5261ac | 3359 | } else if ((ret == -ENOSPC) && !ctxt->set_abort) { |
85db90e7 TM |
3360 | if (di->i_xattr_loc && !xbs->xattr_bh) { |
3361 | ret = ocfs2_xattr_block_find(inode, | |
6b240ff6 JB |
3362 | xi->xi_name_index, |
3363 | xi->xi_name, xbs); | |
85db90e7 TM |
3364 | if (ret) |
3365 | goto out; | |
3366 | ||
9f868f16 | 3367 | old_found = xis->not_found; |
85db90e7 TM |
3368 | xis->not_found = -ENODATA; |
3369 | ret = ocfs2_calc_xattr_set_need(inode, | |
3370 | di, | |
3371 | xi, | |
3372 | xis, | |
3373 | xbs, | |
3374 | NULL, | |
3375 | NULL, | |
3376 | &credits); | |
9f868f16 | 3377 | xis->not_found = old_found; |
85db90e7 TM |
3378 | if (ret) { |
3379 | mlog_errno(ret); | |
3380 | goto out; | |
3381 | } | |
3382 | ||
c901fb00 | 3383 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3384 | if (ret) { |
3385 | mlog_errno(ret); | |
3386 | goto out; | |
3387 | } | |
3388 | } | |
3389 | /* | |
3390 | * If no space in inode, we will set extended attribute | |
3391 | * into external block. | |
3392 | */ | |
3393 | ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); | |
3394 | if (ret) | |
3395 | goto out; | |
3396 | if (!xis->not_found) { | |
3397 | /* | |
3398 | * If succeed and that extended attribute | |
3399 | * existing in inode, we will remove it. | |
3400 | */ | |
6b240ff6 JB |
3401 | xi->xi_value = NULL; |
3402 | xi->xi_value_len = 0; | |
85db90e7 TM |
3403 | xbs->not_found = -ENODATA; |
3404 | ret = ocfs2_calc_xattr_set_need(inode, | |
3405 | di, | |
3406 | xi, | |
3407 | xis, | |
3408 | xbs, | |
3409 | NULL, | |
3410 | NULL, | |
3411 | &credits); | |
3412 | if (ret) { | |
3413 | mlog_errno(ret); | |
3414 | goto out; | |
3415 | } | |
3416 | ||
c901fb00 | 3417 | ret = ocfs2_extend_trans(ctxt->handle, credits); |
85db90e7 TM |
3418 | if (ret) { |
3419 | mlog_errno(ret); | |
3420 | goto out; | |
3421 | } | |
3422 | ret = ocfs2_xattr_ibody_set(inode, xi, | |
3423 | xis, ctxt); | |
3424 | } | |
3425 | } | |
3426 | } | |
3427 | ||
4b3f6209 TM |
3428 | if (!ret) { |
3429 | /* Update inode ctime. */ | |
0cf2f763 | 3430 | ret = ocfs2_journal_access_di(ctxt->handle, INODE_CACHE(inode), |
89a907af TM |
3431 | xis->inode_bh, |
3432 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4b3f6209 TM |
3433 | if (ret) { |
3434 | mlog_errno(ret); | |
3435 | goto out; | |
3436 | } | |
3437 | ||
078cd827 | 3438 | inode->i_ctime = current_time(inode); |
4b3f6209 TM |
3439 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
3440 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
3441 | ocfs2_journal_dirty(ctxt->handle, xis->inode_bh); | |
3442 | } | |
85db90e7 TM |
3443 | out: |
3444 | return ret; | |
3445 | } | |
3446 | ||
6c3faba4 TY |
3447 | /* |
3448 | * This function only called duing creating inode | |
3449 | * for init security/acl xattrs of the new inode. | |
008aafaf | 3450 | * All transanction credits have been reserved in mknod. |
6c3faba4 TY |
3451 | */ |
3452 | int ocfs2_xattr_set_handle(handle_t *handle, | |
3453 | struct inode *inode, | |
3454 | struct buffer_head *di_bh, | |
3455 | int name_index, | |
3456 | const char *name, | |
3457 | const void *value, | |
3458 | size_t value_len, | |
3459 | int flags, | |
3460 | struct ocfs2_alloc_context *meta_ac, | |
3461 | struct ocfs2_alloc_context *data_ac) | |
3462 | { | |
3463 | struct ocfs2_dinode *di; | |
3464 | int ret; | |
3465 | ||
3466 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3467 | .xi_name_index = name_index, |
3468 | .xi_name = name, | |
18853b95 | 3469 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3470 | .xi_value = value, |
3471 | .xi_value_len = value_len, | |
6c3faba4 TY |
3472 | }; |
3473 | ||
3474 | struct ocfs2_xattr_search xis = { | |
3475 | .not_found = -ENODATA, | |
3476 | }; | |
3477 | ||
3478 | struct ocfs2_xattr_search xbs = { | |
3479 | .not_found = -ENODATA, | |
3480 | }; | |
3481 | ||
3482 | struct ocfs2_xattr_set_ctxt ctxt = { | |
3483 | .handle = handle, | |
3484 | .meta_ac = meta_ac, | |
3485 | .data_ac = data_ac, | |
3486 | }; | |
3487 | ||
3488 | if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) | |
3489 | return -EOPNOTSUPP; | |
3490 | ||
008aafaf TY |
3491 | /* |
3492 | * In extreme situation, may need xattr bucket when | |
3493 | * block size is too small. And we have already reserved | |
3494 | * the credits for bucket in mknod. | |
3495 | */ | |
3496 | if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) { | |
3497 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3498 | if (!xbs.bucket) { | |
3499 | mlog_errno(-ENOMEM); | |
3500 | return -ENOMEM; | |
3501 | } | |
3502 | } | |
3503 | ||
6c3faba4 TY |
3504 | xis.inode_bh = xbs.inode_bh = di_bh; |
3505 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3506 | ||
3507 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3508 | ||
3509 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3510 | if (ret) | |
3511 | goto cleanup; | |
3512 | if (xis.not_found) { | |
3513 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3514 | if (ret) | |
3515 | goto cleanup; | |
3516 | } | |
3517 | ||
3518 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
3519 | ||
3520 | cleanup: | |
3521 | up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3522 | brelse(xbs.xattr_bh); | |
008aafaf | 3523 | ocfs2_xattr_bucket_free(xbs.bucket); |
6c3faba4 TY |
3524 | |
3525 | return ret; | |
3526 | } | |
3527 | ||
cf1d6c76 TY |
3528 | /* |
3529 | * ocfs2_xattr_set() | |
3530 | * | |
3531 | * Set, replace or remove an extended attribute for this inode. | |
3532 | * value is NULL to remove an existing extended attribute, else either | |
3533 | * create or replace an extended attribute. | |
3534 | */ | |
3535 | int ocfs2_xattr_set(struct inode *inode, | |
3536 | int name_index, | |
3537 | const char *name, | |
3538 | const void *value, | |
3539 | size_t value_len, | |
3540 | int flags) | |
3541 | { | |
3542 | struct buffer_head *di_bh = NULL; | |
3543 | struct ocfs2_dinode *di; | |
8818efaa | 3544 | int ret, credits, had_lock, ref_meta = 0, ref_credits = 0; |
78f30c31 | 3545 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
85db90e7 | 3546 | struct inode *tl_inode = osb->osb_tl_inode; |
6ea437a3 | 3547 | struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, NULL, }; |
492a8a33 | 3548 | struct ocfs2_refcount_tree *ref_tree = NULL; |
8818efaa | 3549 | struct ocfs2_lock_holder oh; |
cf1d6c76 TY |
3550 | |
3551 | struct ocfs2_xattr_info xi = { | |
6b240ff6 JB |
3552 | .xi_name_index = name_index, |
3553 | .xi_name = name, | |
18853b95 | 3554 | .xi_name_len = strlen(name), |
6b240ff6 JB |
3555 | .xi_value = value, |
3556 | .xi_value_len = value_len, | |
cf1d6c76 TY |
3557 | }; |
3558 | ||
3559 | struct ocfs2_xattr_search xis = { | |
3560 | .not_found = -ENODATA, | |
3561 | }; | |
3562 | ||
3563 | struct ocfs2_xattr_search xbs = { | |
3564 | .not_found = -ENODATA, | |
3565 | }; | |
3566 | ||
1119d3c0 | 3567 | if (!ocfs2_supports_xattr(osb)) |
8154da3d TY |
3568 | return -EOPNOTSUPP; |
3569 | ||
ba937127 JB |
3570 | /* |
3571 | * Only xbs will be used on indexed trees. xis doesn't need a | |
3572 | * bucket. | |
3573 | */ | |
3574 | xbs.bucket = ocfs2_xattr_bucket_new(inode); | |
3575 | if (!xbs.bucket) { | |
3576 | mlog_errno(-ENOMEM); | |
3577 | return -ENOMEM; | |
3578 | } | |
3579 | ||
8818efaa ER |
3580 | had_lock = ocfs2_inode_lock_tracker(inode, &di_bh, 1, &oh); |
3581 | if (had_lock < 0) { | |
3582 | ret = had_lock; | |
cf1d6c76 | 3583 | mlog_errno(ret); |
ba937127 | 3584 | goto cleanup_nolock; |
cf1d6c76 TY |
3585 | } |
3586 | xis.inode_bh = xbs.inode_bh = di_bh; | |
3587 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
3588 | ||
3589 | down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
3590 | /* | |
3591 | * Scan inode and external block to find the same name | |
25985edc | 3592 | * extended attribute and collect search information. |
cf1d6c76 TY |
3593 | */ |
3594 | ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
3595 | if (ret) | |
3596 | goto cleanup; | |
3597 | if (xis.not_found) { | |
3598 | ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
3599 | if (ret) | |
3600 | goto cleanup; | |
3601 | } | |
3602 | ||
3603 | if (xis.not_found && xbs.not_found) { | |
3604 | ret = -ENODATA; | |
3605 | if (flags & XATTR_REPLACE) | |
3606 | goto cleanup; | |
3607 | ret = 0; | |
3608 | if (!value) | |
3609 | goto cleanup; | |
3610 | } else { | |
3611 | ret = -EEXIST; | |
3612 | if (flags & XATTR_CREATE) | |
3613 | goto cleanup; | |
3614 | } | |
3615 | ||
25985edc | 3616 | /* Check whether the value is refcounted and do some preparation. */ |
84e40080 | 3617 | if (ocfs2_is_refcount_inode(inode) && |
492a8a33 TM |
3618 | (!xis.not_found || !xbs.not_found)) { |
3619 | ret = ocfs2_prepare_refcount_xattr(inode, di, &xi, | |
3620 | &xis, &xbs, &ref_tree, | |
3621 | &ref_meta, &ref_credits); | |
3622 | if (ret) { | |
3623 | mlog_errno(ret); | |
3624 | goto cleanup; | |
3625 | } | |
3626 | } | |
85db90e7 | 3627 | |
5955102c | 3628 | inode_lock(tl_inode); |
85db90e7 TM |
3629 | |
3630 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
3631 | ret = __ocfs2_flush_truncate_log(osb); | |
3632 | if (ret < 0) { | |
5955102c | 3633 | inode_unlock(tl_inode); |
85db90e7 TM |
3634 | mlog_errno(ret); |
3635 | goto cleanup; | |
3636 | } | |
3637 | } | |
5955102c | 3638 | inode_unlock(tl_inode); |
85db90e7 TM |
3639 | |
3640 | ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, | |
492a8a33 | 3641 | &xbs, &ctxt, ref_meta, &credits); |
78f30c31 TM |
3642 | if (ret) { |
3643 | mlog_errno(ret); | |
3644 | goto cleanup; | |
3645 | } | |
3646 | ||
4b3f6209 TM |
3647 | /* we need to update inode's ctime field, so add credit for it. */ |
3648 | credits += OCFS2_INODE_UPDATE_CREDITS; | |
492a8a33 | 3649 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); |
85db90e7 TM |
3650 | if (IS_ERR(ctxt.handle)) { |
3651 | ret = PTR_ERR(ctxt.handle); | |
3652 | mlog_errno(ret); | |
6ea437a3 | 3653 | goto out_free_ac; |
cf1d6c76 | 3654 | } |
85db90e7 TM |
3655 | |
3656 | ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); | |
6fdb702d | 3657 | ocfs2_update_inode_fsync_trans(ctxt.handle, inode, 0); |
85db90e7 TM |
3658 | |
3659 | ocfs2_commit_trans(osb, ctxt.handle); | |
3660 | ||
6ea437a3 | 3661 | out_free_ac: |
78f30c31 TM |
3662 | if (ctxt.data_ac) |
3663 | ocfs2_free_alloc_context(ctxt.data_ac); | |
3664 | if (ctxt.meta_ac) | |
3665 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
3666 | if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) | |
3667 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
3668 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
8b2c0dba | 3669 | |
cf1d6c76 | 3670 | cleanup: |
492a8a33 TM |
3671 | if (ref_tree) |
3672 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
cf1d6c76 | 3673 | up_write(&OCFS2_I(inode)->ip_xattr_sem); |
8b2c0dba TM |
3674 | if (!value && !ret) { |
3675 | ret = ocfs2_try_remove_refcount_tree(inode, di_bh); | |
3676 | if (ret) | |
3677 | mlog_errno(ret); | |
3678 | } | |
8818efaa | 3679 | ocfs2_inode_unlock_tracker(inode, 1, &oh, had_lock); |
ba937127 | 3680 | cleanup_nolock: |
cf1d6c76 TY |
3681 | brelse(di_bh); |
3682 | brelse(xbs.xattr_bh); | |
ba937127 | 3683 | ocfs2_xattr_bucket_free(xbs.bucket); |
cf1d6c76 TY |
3684 | |
3685 | return ret; | |
3686 | } | |
3687 | ||
0c044f0b TM |
3688 | /* |
3689 | * Find the xattr extent rec which may contains name_hash. | |
3690 | * e_cpos will be the first name hash of the xattr rec. | |
3691 | * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. | |
3692 | */ | |
3693 | static int ocfs2_xattr_get_rec(struct inode *inode, | |
3694 | u32 name_hash, | |
3695 | u64 *p_blkno, | |
3696 | u32 *e_cpos, | |
3697 | u32 *num_clusters, | |
3698 | struct ocfs2_extent_list *el) | |
3699 | { | |
3700 | int ret = 0, i; | |
3701 | struct buffer_head *eb_bh = NULL; | |
3702 | struct ocfs2_extent_block *eb; | |
3703 | struct ocfs2_extent_rec *rec = NULL; | |
3704 | u64 e_blkno = 0; | |
3705 | ||
3706 | if (el->l_tree_depth) { | |
facdb77f JB |
3707 | ret = ocfs2_find_leaf(INODE_CACHE(inode), el, name_hash, |
3708 | &eb_bh); | |
0c044f0b TM |
3709 | if (ret) { |
3710 | mlog_errno(ret); | |
3711 | goto out; | |
3712 | } | |
3713 | ||
3714 | eb = (struct ocfs2_extent_block *) eb_bh->b_data; | |
3715 | el = &eb->h_list; | |
3716 | ||
3717 | if (el->l_tree_depth) { | |
17a5b9ab | 3718 | ret = ocfs2_error(inode->i_sb, |
7ecef14a JP |
3719 | "Inode %lu has non zero tree depth in xattr tree block %llu\n", |
3720 | inode->i_ino, | |
3721 | (unsigned long long)eb_bh->b_blocknr); | |
0c044f0b TM |
3722 | goto out; |
3723 | } | |
3724 | } | |
3725 | ||
3726 | for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { | |
3727 | rec = &el->l_recs[i]; | |
3728 | ||
3729 | if (le32_to_cpu(rec->e_cpos) <= name_hash) { | |
3730 | e_blkno = le64_to_cpu(rec->e_blkno); | |
3731 | break; | |
3732 | } | |
3733 | } | |
3734 | ||
3735 | if (!e_blkno) { | |
7ecef14a JP |
3736 | ret = ocfs2_error(inode->i_sb, "Inode %lu has bad extent record (%u, %u, 0) in xattr\n", |
3737 | inode->i_ino, | |
3738 | le32_to_cpu(rec->e_cpos), | |
3739 | ocfs2_rec_clusters(el, rec)); | |
0c044f0b TM |
3740 | goto out; |
3741 | } | |
3742 | ||
3743 | *p_blkno = le64_to_cpu(rec->e_blkno); | |
3744 | *num_clusters = le16_to_cpu(rec->e_leaf_clusters); | |
3745 | if (e_cpos) | |
3746 | *e_cpos = le32_to_cpu(rec->e_cpos); | |
3747 | out: | |
3748 | brelse(eb_bh); | |
3749 | return ret; | |
3750 | } | |
3751 | ||
3752 | typedef int (xattr_bucket_func)(struct inode *inode, | |
3753 | struct ocfs2_xattr_bucket *bucket, | |
3754 | void *para); | |
3755 | ||
589dc260 | 3756 | static int ocfs2_find_xe_in_bucket(struct inode *inode, |
e2356a3f | 3757 | struct ocfs2_xattr_bucket *bucket, |
589dc260 TM |
3758 | int name_index, |
3759 | const char *name, | |
3760 | u32 name_hash, | |
3761 | u16 *xe_index, | |
3762 | int *found) | |
3763 | { | |
3764 | int i, ret = 0, cmp = 1, block_off, new_offset; | |
e2356a3f | 3765 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
589dc260 TM |
3766 | size_t name_len = strlen(name); |
3767 | struct ocfs2_xattr_entry *xe = NULL; | |
589dc260 TM |
3768 | char *xe_name; |
3769 | ||
3770 | /* | |
3771 | * We don't use binary search in the bucket because there | |
3772 | * may be multiple entries with the same name hash. | |
3773 | */ | |
3774 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
3775 | xe = &xh->xh_entries[i]; | |
3776 | ||
3777 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) | |
3778 | continue; | |
3779 | else if (name_hash < le32_to_cpu(xe->xe_name_hash)) | |
3780 | break; | |
3781 | ||
3782 | cmp = name_index - ocfs2_xattr_get_type(xe); | |
3783 | if (!cmp) | |
3784 | cmp = name_len - xe->xe_name_len; | |
3785 | if (cmp) | |
3786 | continue; | |
3787 | ||
fd68a894 | 3788 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
589dc260 TM |
3789 | xh, |
3790 | i, | |
3791 | &block_off, | |
3792 | &new_offset); | |
3793 | if (ret) { | |
3794 | mlog_errno(ret); | |
3795 | break; | |
3796 | } | |
3797 | ||
970e4936 | 3798 | |
e2356a3f JB |
3799 | xe_name = bucket_block(bucket, block_off) + new_offset; |
3800 | if (!memcmp(name, xe_name, name_len)) { | |
589dc260 TM |
3801 | *xe_index = i; |
3802 | *found = 1; | |
3803 | ret = 0; | |
3804 | break; | |
3805 | } | |
3806 | } | |
3807 | ||
3808 | return ret; | |
3809 | } | |
3810 | ||
3811 | /* | |
3812 | * Find the specified xattr entry in a series of buckets. | |
3813 | * This series start from p_blkno and last for num_clusters. | |
3814 | * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains | |
3815 | * the num of the valid buckets. | |
3816 | * | |
3817 | * Return the buffer_head this xattr should reside in. And if the xattr's | |
3818 | * hash is in the gap of 2 buckets, return the lower bucket. | |
3819 | */ | |
3820 | static int ocfs2_xattr_bucket_find(struct inode *inode, | |
3821 | int name_index, | |
3822 | const char *name, | |
3823 | u32 name_hash, | |
3824 | u64 p_blkno, | |
3825 | u32 first_hash, | |
3826 | u32 num_clusters, | |
3827 | struct ocfs2_xattr_search *xs) | |
3828 | { | |
3829 | int ret, found = 0; | |
589dc260 TM |
3830 | struct ocfs2_xattr_header *xh = NULL; |
3831 | struct ocfs2_xattr_entry *xe = NULL; | |
3832 | u16 index = 0; | |
3833 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
3834 | int low_bucket = 0, bucket, high_bucket; | |
e2356a3f | 3835 | struct ocfs2_xattr_bucket *search; |
589dc260 | 3836 | u32 last_hash; |
e2356a3f | 3837 | u64 blkno, lower_blkno = 0; |
589dc260 | 3838 | |
e2356a3f JB |
3839 | search = ocfs2_xattr_bucket_new(inode); |
3840 | if (!search) { | |
3841 | ret = -ENOMEM; | |
3842 | mlog_errno(ret); | |
3843 | goto out; | |
3844 | } | |
3845 | ||
3846 | ret = ocfs2_read_xattr_bucket(search, p_blkno); | |
589dc260 TM |
3847 | if (ret) { |
3848 | mlog_errno(ret); | |
3849 | goto out; | |
3850 | } | |
3851 | ||
e2356a3f | 3852 | xh = bucket_xh(search); |
589dc260 | 3853 | high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; |
589dc260 | 3854 | while (low_bucket <= high_bucket) { |
e2356a3f | 3855 | ocfs2_xattr_bucket_relse(search); |
589dc260 | 3856 | |
e2356a3f | 3857 | bucket = (low_bucket + high_bucket) / 2; |
589dc260 | 3858 | blkno = p_blkno + bucket * blk_per_bucket; |
e2356a3f | 3859 | ret = ocfs2_read_xattr_bucket(search, blkno); |
589dc260 TM |
3860 | if (ret) { |
3861 | mlog_errno(ret); | |
3862 | goto out; | |
3863 | } | |
3864 | ||
e2356a3f | 3865 | xh = bucket_xh(search); |
589dc260 TM |
3866 | xe = &xh->xh_entries[0]; |
3867 | if (name_hash < le32_to_cpu(xe->xe_name_hash)) { | |
3868 | high_bucket = bucket - 1; | |
3869 | continue; | |
3870 | } | |
3871 | ||
3872 | /* | |
3873 | * Check whether the hash of the last entry in our | |
5a095611 TM |
3874 | * bucket is larger than the search one. for an empty |
3875 | * bucket, the last one is also the first one. | |
589dc260 | 3876 | */ |
5a095611 TM |
3877 | if (xh->xh_count) |
3878 | xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; | |
3879 | ||
589dc260 TM |
3880 | last_hash = le32_to_cpu(xe->xe_name_hash); |
3881 | ||
e2356a3f JB |
3882 | /* record lower_blkno which may be the insert place. */ |
3883 | lower_blkno = blkno; | |
589dc260 TM |
3884 | |
3885 | if (name_hash > le32_to_cpu(xe->xe_name_hash)) { | |
3886 | low_bucket = bucket + 1; | |
3887 | continue; | |
3888 | } | |
3889 | ||
3890 | /* the searched xattr should reside in this bucket if exists. */ | |
e2356a3f | 3891 | ret = ocfs2_find_xe_in_bucket(inode, search, |
589dc260 TM |
3892 | name_index, name, name_hash, |
3893 | &index, &found); | |
3894 | if (ret) { | |
3895 | mlog_errno(ret); | |
3896 | goto out; | |
3897 | } | |
3898 | break; | |
3899 | } | |
3900 | ||
3901 | /* | |
3902 | * Record the bucket we have found. | |
3903 | * When the xattr's hash value is in the gap of 2 buckets, we will | |
3904 | * always set it to the previous bucket. | |
3905 | */ | |
e2356a3f JB |
3906 | if (!lower_blkno) |
3907 | lower_blkno = p_blkno; | |
3908 | ||
3909 | /* This should be in cache - we just read it during the search */ | |
3910 | ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); | |
3911 | if (ret) { | |
3912 | mlog_errno(ret); | |
3913 | goto out; | |
589dc260 | 3914 | } |
589dc260 | 3915 | |
ba937127 JB |
3916 | xs->header = bucket_xh(xs->bucket); |
3917 | xs->base = bucket_block(xs->bucket, 0); | |
589dc260 TM |
3918 | xs->end = xs->base + inode->i_sb->s_blocksize; |
3919 | ||
3920 | if (found) { | |
589dc260 | 3921 | xs->here = &xs->header->xh_entries[index]; |
402b4183 TM |
3922 | trace_ocfs2_xattr_bucket_find(OCFS2_I(inode)->ip_blkno, |
3923 | name, name_index, name_hash, | |
3924 | (unsigned long long)bucket_blkno(xs->bucket), | |
3925 | index); | |
589dc260 TM |
3926 | } else |
3927 | ret = -ENODATA; | |
3928 | ||
3929 | out: | |
e2356a3f | 3930 | ocfs2_xattr_bucket_free(search); |
589dc260 TM |
3931 | return ret; |
3932 | } | |
3933 | ||
3934 | static int ocfs2_xattr_index_block_find(struct inode *inode, | |
3935 | struct buffer_head *root_bh, | |
3936 | int name_index, | |
3937 | const char *name, | |
3938 | struct ocfs2_xattr_search *xs) | |
3939 | { | |
3940 | int ret; | |
3941 | struct ocfs2_xattr_block *xb = | |
3942 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
3943 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
3944 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
3945 | u64 p_blkno = 0; | |
3946 | u32 first_hash, num_clusters = 0; | |
2057e5c6 | 3947 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
589dc260 TM |
3948 | |
3949 | if (le16_to_cpu(el->l_next_free_rec) == 0) | |
3950 | return -ENODATA; | |
3951 | ||
402b4183 TM |
3952 | trace_ocfs2_xattr_index_block_find(OCFS2_I(inode)->ip_blkno, |
3953 | name, name_index, name_hash, | |
3954 | (unsigned long long)root_bh->b_blocknr, | |
3955 | -1); | |
589dc260 TM |
3956 | |
3957 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, | |
3958 | &num_clusters, el); | |
3959 | if (ret) { | |
3960 | mlog_errno(ret); | |
3961 | goto out; | |
3962 | } | |
3963 | ||
3964 | BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); | |
3965 | ||
402b4183 TM |
3966 | trace_ocfs2_xattr_index_block_find_rec(OCFS2_I(inode)->ip_blkno, |
3967 | name, name_index, first_hash, | |
3968 | (unsigned long long)p_blkno, | |
3969 | num_clusters); | |
589dc260 TM |
3970 | |
3971 | ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, | |
3972 | p_blkno, first_hash, num_clusters, xs); | |
3973 | ||
3974 | out: | |
3975 | return ret; | |
3976 | } | |
3977 | ||
0c044f0b TM |
3978 | static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
3979 | u64 blkno, | |
3980 | u32 clusters, | |
3981 | xattr_bucket_func *func, | |
3982 | void *para) | |
3983 | { | |
6dde41d9 | 3984 | int i, ret = 0; |
0c044f0b TM |
3985 | u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
3986 | u32 num_buckets = clusters * bpc; | |
ba937127 | 3987 | struct ocfs2_xattr_bucket *bucket; |
0c044f0b | 3988 | |
ba937127 JB |
3989 | bucket = ocfs2_xattr_bucket_new(inode); |
3990 | if (!bucket) { | |
3991 | mlog_errno(-ENOMEM); | |
3992 | return -ENOMEM; | |
3993 | } | |
0c044f0b | 3994 | |
402b4183 TM |
3995 | trace_ocfs2_iterate_xattr_buckets( |
3996 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
3997 | (unsigned long long)blkno, clusters); | |
0c044f0b | 3998 | |
ba937127 JB |
3999 | for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { |
4000 | ret = ocfs2_read_xattr_bucket(bucket, blkno); | |
0c044f0b TM |
4001 | if (ret) { |
4002 | mlog_errno(ret); | |
ba937127 | 4003 | break; |
0c044f0b TM |
4004 | } |
4005 | ||
0c044f0b TM |
4006 | /* |
4007 | * The real bucket num in this series of blocks is stored | |
4008 | * in the 1st bucket. | |
4009 | */ | |
4010 | if (i == 0) | |
ba937127 | 4011 | num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); |
0c044f0b | 4012 | |
402b4183 | 4013 | trace_ocfs2_iterate_xattr_bucket((unsigned long long)blkno, |
ba937127 | 4014 | le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); |
0c044f0b | 4015 | if (func) { |
ba937127 | 4016 | ret = func(inode, bucket, para); |
a46fa684 | 4017 | if (ret && ret != -ERANGE) |
0c044f0b | 4018 | mlog_errno(ret); |
ba937127 | 4019 | /* Fall through to bucket_relse() */ |
0c044f0b TM |
4020 | } |
4021 | ||
ba937127 JB |
4022 | ocfs2_xattr_bucket_relse(bucket); |
4023 | if (ret) | |
4024 | break; | |
0c044f0b TM |
4025 | } |
4026 | ||
ba937127 | 4027 | ocfs2_xattr_bucket_free(bucket); |
0c044f0b TM |
4028 | return ret; |
4029 | } | |
4030 | ||
4031 | struct ocfs2_xattr_tree_list { | |
4032 | char *buffer; | |
4033 | size_t buffer_size; | |
936b8834 | 4034 | size_t result; |
0c044f0b TM |
4035 | }; |
4036 | ||
fd68a894 | 4037 | static int ocfs2_xattr_bucket_get_name_value(struct super_block *sb, |
0c044f0b TM |
4038 | struct ocfs2_xattr_header *xh, |
4039 | int index, | |
4040 | int *block_off, | |
4041 | int *new_offset) | |
4042 | { | |
4043 | u16 name_offset; | |
4044 | ||
4045 | if (index < 0 || index >= le16_to_cpu(xh->xh_count)) | |
4046 | return -EINVAL; | |
4047 | ||
4048 | name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); | |
4049 | ||
fd68a894 TM |
4050 | *block_off = name_offset >> sb->s_blocksize_bits; |
4051 | *new_offset = name_offset % sb->s_blocksize; | |
0c044f0b TM |
4052 | |
4053 | return 0; | |
4054 | } | |
4055 | ||
4056 | static int ocfs2_list_xattr_bucket(struct inode *inode, | |
4057 | struct ocfs2_xattr_bucket *bucket, | |
4058 | void *para) | |
4059 | { | |
936b8834 | 4060 | int ret = 0, type; |
0c044f0b | 4061 | struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
0c044f0b | 4062 | int i, block_off, new_offset; |
1046cb11 | 4063 | const char *name; |
0c044f0b | 4064 | |
3e632946 JB |
4065 | for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { |
4066 | struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; | |
936b8834 | 4067 | type = ocfs2_xattr_get_type(entry); |
0c044f0b | 4068 | |
1046cb11 AG |
4069 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
4070 | bucket_xh(bucket), | |
4071 | i, | |
4072 | &block_off, | |
4073 | &new_offset); | |
4074 | if (ret) | |
4075 | break; | |
936b8834 | 4076 | |
1046cb11 AG |
4077 | name = (const char *)bucket_block(bucket, block_off) + |
4078 | new_offset; | |
4079 | ret = ocfs2_xattr_list_entry(inode->i_sb, | |
4080 | xl->buffer, | |
4081 | xl->buffer_size, | |
4082 | &xl->result, | |
4083 | type, name, | |
4084 | entry->xe_name_len); | |
4085 | if (ret) | |
4086 | break; | |
0c044f0b TM |
4087 | } |
4088 | ||
4089 | return ret; | |
4090 | } | |
4091 | ||
47bca495 TM |
4092 | static int ocfs2_iterate_xattr_index_block(struct inode *inode, |
4093 | struct buffer_head *blk_bh, | |
4094 | xattr_tree_rec_func *rec_func, | |
4095 | void *para) | |
0c044f0b | 4096 | { |
47bca495 TM |
4097 | struct ocfs2_xattr_block *xb = |
4098 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
4099 | struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; | |
0c044f0b TM |
4100 | int ret = 0; |
4101 | u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; | |
4102 | u64 p_blkno = 0; | |
0c044f0b | 4103 | |
47bca495 | 4104 | if (!el->l_next_free_rec || !rec_func) |
0c044f0b TM |
4105 | return 0; |
4106 | ||
4107 | while (name_hash > 0) { | |
4108 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, | |
4109 | &e_cpos, &num_clusters, el); | |
4110 | if (ret) { | |
4111 | mlog_errno(ret); | |
47bca495 | 4112 | break; |
0c044f0b TM |
4113 | } |
4114 | ||
47bca495 TM |
4115 | ret = rec_func(inode, blk_bh, p_blkno, e_cpos, |
4116 | num_clusters, para); | |
0c044f0b | 4117 | if (ret) { |
a46fa684 TM |
4118 | if (ret != -ERANGE) |
4119 | mlog_errno(ret); | |
47bca495 | 4120 | break; |
0c044f0b TM |
4121 | } |
4122 | ||
4123 | if (e_cpos == 0) | |
4124 | break; | |
4125 | ||
4126 | name_hash = e_cpos - 1; | |
4127 | } | |
4128 | ||
47bca495 TM |
4129 | return ret; |
4130 | ||
4131 | } | |
4132 | ||
4133 | static int ocfs2_list_xattr_tree_rec(struct inode *inode, | |
4134 | struct buffer_head *root_bh, | |
4135 | u64 blkno, u32 cpos, u32 len, void *para) | |
4136 | { | |
4137 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
4138 | ocfs2_list_xattr_bucket, para); | |
4139 | } | |
4140 | ||
4141 | static int ocfs2_xattr_tree_list_index_block(struct inode *inode, | |
4142 | struct buffer_head *blk_bh, | |
4143 | char *buffer, | |
4144 | size_t buffer_size) | |
4145 | { | |
4146 | int ret; | |
4147 | struct ocfs2_xattr_tree_list xl = { | |
4148 | .buffer = buffer, | |
4149 | .buffer_size = buffer_size, | |
4150 | .result = 0, | |
4151 | }; | |
4152 | ||
4153 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
4154 | ocfs2_list_xattr_tree_rec, &xl); | |
4155 | if (ret) { | |
4156 | mlog_errno(ret); | |
4157 | goto out; | |
4158 | } | |
4159 | ||
936b8834 | 4160 | ret = xl.result; |
0c044f0b TM |
4161 | out: |
4162 | return ret; | |
4163 | } | |
01225596 TM |
4164 | |
4165 | static int cmp_xe(const void *a, const void *b) | |
4166 | { | |
4167 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4168 | u32 l_hash = le32_to_cpu(l->xe_name_hash); | |
4169 | u32 r_hash = le32_to_cpu(r->xe_name_hash); | |
4170 | ||
4171 | if (l_hash > r_hash) | |
4172 | return 1; | |
4173 | if (l_hash < r_hash) | |
4174 | return -1; | |
4175 | return 0; | |
4176 | } | |
4177 | ||
4178 | static void swap_xe(void *a, void *b, int size) | |
4179 | { | |
4180 | struct ocfs2_xattr_entry *l = a, *r = b, tmp; | |
4181 | ||
4182 | tmp = *l; | |
4183 | memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); | |
4184 | memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); | |
4185 | } | |
4186 | ||
4187 | /* | |
4188 | * When the ocfs2_xattr_block is filled up, new bucket will be created | |
4189 | * and all the xattr entries will be moved to the new bucket. | |
178eeac3 JB |
4190 | * The header goes at the start of the bucket, and the names+values are |
4191 | * filled from the end. This is why *target starts as the last buffer. | |
01225596 TM |
4192 | * Note: we need to sort the entries since they are not saved in order |
4193 | * in the ocfs2_xattr_block. | |
4194 | */ | |
4195 | static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, | |
4196 | struct buffer_head *xb_bh, | |
178eeac3 | 4197 | struct ocfs2_xattr_bucket *bucket) |
01225596 TM |
4198 | { |
4199 | int i, blocksize = inode->i_sb->s_blocksize; | |
178eeac3 | 4200 | int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 TM |
4201 | u16 offset, size, off_change; |
4202 | struct ocfs2_xattr_entry *xe; | |
4203 | struct ocfs2_xattr_block *xb = | |
4204 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4205 | struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; | |
178eeac3 | 4206 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 4207 | u16 count = le16_to_cpu(xb_xh->xh_count); |
178eeac3 JB |
4208 | char *src = xb_bh->b_data; |
4209 | char *target = bucket_block(bucket, blks - 1); | |
01225596 | 4210 | |
402b4183 TM |
4211 | trace_ocfs2_cp_xattr_block_to_bucket_begin( |
4212 | (unsigned long long)xb_bh->b_blocknr, | |
4213 | (unsigned long long)bucket_blkno(bucket)); | |
178eeac3 JB |
4214 | |
4215 | for (i = 0; i < blks; i++) | |
4216 | memset(bucket_block(bucket, i), 0, blocksize); | |
01225596 | 4217 | |
01225596 TM |
4218 | /* |
4219 | * Since the xe_name_offset is based on ocfs2_xattr_header, | |
4220 | * there is a offset change corresponding to the change of | |
4221 | * ocfs2_xattr_header's position. | |
4222 | */ | |
4223 | off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4224 | xe = &xb_xh->xh_entries[count - 1]; | |
4225 | offset = le16_to_cpu(xe->xe_name_offset) + off_change; | |
4226 | size = blocksize - offset; | |
4227 | ||
4228 | /* copy all the names and values. */ | |
01225596 TM |
4229 | memcpy(target + offset, src + offset, size); |
4230 | ||
4231 | /* Init new header now. */ | |
4232 | xh->xh_count = xb_xh->xh_count; | |
4233 | xh->xh_num_buckets = cpu_to_le16(1); | |
4234 | xh->xh_name_value_len = cpu_to_le16(size); | |
4235 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); | |
4236 | ||
4237 | /* copy all the entries. */ | |
178eeac3 | 4238 | target = bucket_block(bucket, 0); |
01225596 TM |
4239 | offset = offsetof(struct ocfs2_xattr_header, xh_entries); |
4240 | size = count * sizeof(struct ocfs2_xattr_entry); | |
4241 | memcpy(target + offset, (char *)xb_xh + offset, size); | |
4242 | ||
4243 | /* Change the xe offset for all the xe because of the move. */ | |
4244 | off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + | |
4245 | offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
4246 | for (i = 0; i < count; i++) | |
4247 | le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); | |
4248 | ||
402b4183 | 4249 | trace_ocfs2_cp_xattr_block_to_bucket_end(offset, size, off_change); |
01225596 TM |
4250 | |
4251 | sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), | |
4252 | cmp_xe, swap_xe); | |
4253 | } | |
4254 | ||
4255 | /* | |
4256 | * After we move xattr from block to index btree, we have to | |
4257 | * update ocfs2_xattr_search to the new xe and base. | |
4258 | * | |
4259 | * When the entry is in xattr block, xattr_bh indicates the storage place. | |
4260 | * While if the entry is in index b-tree, "bucket" indicates the | |
4261 | * real place of the xattr. | |
4262 | */ | |
178eeac3 JB |
4263 | static void ocfs2_xattr_update_xattr_search(struct inode *inode, |
4264 | struct ocfs2_xattr_search *xs, | |
4265 | struct buffer_head *old_bh) | |
01225596 | 4266 | { |
01225596 TM |
4267 | char *buf = old_bh->b_data; |
4268 | struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; | |
4269 | struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; | |
178eeac3 | 4270 | int i; |
01225596 | 4271 | |
ba937127 | 4272 | xs->header = bucket_xh(xs->bucket); |
178eeac3 | 4273 | xs->base = bucket_block(xs->bucket, 0); |
01225596 TM |
4274 | xs->end = xs->base + inode->i_sb->s_blocksize; |
4275 | ||
178eeac3 JB |
4276 | if (xs->not_found) |
4277 | return; | |
01225596 | 4278 | |
178eeac3 JB |
4279 | i = xs->here - old_xh->xh_entries; |
4280 | xs->here = &xs->header->xh_entries[i]; | |
01225596 TM |
4281 | } |
4282 | ||
4283 | static int ocfs2_xattr_create_index_block(struct inode *inode, | |
78f30c31 TM |
4284 | struct ocfs2_xattr_search *xs, |
4285 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 4286 | { |
85db90e7 | 4287 | int ret; |
01225596 TM |
4288 | u32 bit_off, len; |
4289 | u64 blkno; | |
85db90e7 | 4290 | handle_t *handle = ctxt->handle; |
01225596 | 4291 | struct ocfs2_inode_info *oi = OCFS2_I(inode); |
01225596 TM |
4292 | struct buffer_head *xb_bh = xs->xattr_bh; |
4293 | struct ocfs2_xattr_block *xb = | |
4294 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
4295 | struct ocfs2_xattr_tree_root *xr; | |
4296 | u16 xb_flags = le16_to_cpu(xb->xb_flags); | |
01225596 | 4297 | |
402b4183 TM |
4298 | trace_ocfs2_xattr_create_index_block_begin( |
4299 | (unsigned long long)xb_bh->b_blocknr); | |
01225596 TM |
4300 | |
4301 | BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); | |
178eeac3 | 4302 | BUG_ON(!xs->bucket); |
01225596 | 4303 | |
01225596 TM |
4304 | /* |
4305 | * XXX: | |
4306 | * We can use this lock for now, and maybe move to a dedicated mutex | |
4307 | * if performance becomes a problem later. | |
4308 | */ | |
4309 | down_write(&oi->ip_alloc_sem); | |
4310 | ||
0cf2f763 | 4311 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), xb_bh, |
84008972 | 4312 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4313 | if (ret) { |
4314 | mlog_errno(ret); | |
85db90e7 | 4315 | goto out; |
01225596 TM |
4316 | } |
4317 | ||
1ed9b777 | 4318 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, |
78f30c31 | 4319 | 1, 1, &bit_off, &len); |
01225596 TM |
4320 | if (ret) { |
4321 | mlog_errno(ret); | |
85db90e7 | 4322 | goto out; |
01225596 TM |
4323 | } |
4324 | ||
4325 | /* | |
4326 | * The bucket may spread in many blocks, and | |
4327 | * we will only touch the 1st block and the last block | |
4328 | * in the whole bucket(one for entry and one for data). | |
4329 | */ | |
4330 | blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); | |
4331 | ||
402b4183 | 4332 | trace_ocfs2_xattr_create_index_block((unsigned long long)blkno); |
01225596 | 4333 | |
9c339255 | 4334 | ret = ocfs2_init_xattr_bucket(xs->bucket, blkno, 1); |
178eeac3 | 4335 | if (ret) { |
01225596 | 4336 | mlog_errno(ret); |
85db90e7 | 4337 | goto out; |
01225596 TM |
4338 | } |
4339 | ||
178eeac3 JB |
4340 | ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, |
4341 | OCFS2_JOURNAL_ACCESS_CREATE); | |
01225596 TM |
4342 | if (ret) { |
4343 | mlog_errno(ret); | |
85db90e7 | 4344 | goto out; |
01225596 TM |
4345 | } |
4346 | ||
178eeac3 JB |
4347 | ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); |
4348 | ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); | |
01225596 | 4349 | |
178eeac3 | 4350 | ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); |
01225596 TM |
4351 | |
4352 | /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ | |
4353 | memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - | |
4354 | offsetof(struct ocfs2_xattr_block, xb_attrs)); | |
4355 | ||
4356 | xr = &xb->xb_attrs.xb_root; | |
4357 | xr->xt_clusters = cpu_to_le32(1); | |
4358 | xr->xt_last_eb_blk = 0; | |
4359 | xr->xt_list.l_tree_depth = 0; | |
4360 | xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); | |
4361 | xr->xt_list.l_next_free_rec = cpu_to_le16(1); | |
4362 | ||
4363 | xr->xt_list.l_recs[0].e_cpos = 0; | |
4364 | xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); | |
4365 | xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); | |
4366 | ||
4367 | xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); | |
4368 | ||
85db90e7 | 4369 | ocfs2_journal_dirty(handle, xb_bh); |
01225596 | 4370 | |
85db90e7 | 4371 | out: |
01225596 TM |
4372 | up_write(&oi->ip_alloc_sem); |
4373 | ||
01225596 TM |
4374 | return ret; |
4375 | } | |
4376 | ||
4377 | static int cmp_xe_offset(const void *a, const void *b) | |
4378 | { | |
4379 | const struct ocfs2_xattr_entry *l = a, *r = b; | |
4380 | u32 l_name_offset = le16_to_cpu(l->xe_name_offset); | |
4381 | u32 r_name_offset = le16_to_cpu(r->xe_name_offset); | |
4382 | ||
4383 | if (l_name_offset < r_name_offset) | |
4384 | return 1; | |
4385 | if (l_name_offset > r_name_offset) | |
4386 | return -1; | |
4387 | return 0; | |
4388 | } | |
4389 | ||
4390 | /* | |
4391 | * defrag a xattr bucket if we find that the bucket has some | |
4392 | * holes beteen name/value pairs. | |
4393 | * We will move all the name/value pairs to the end of the bucket | |
4394 | * so that we can spare some space for insertion. | |
4395 | */ | |
4396 | static int ocfs2_defrag_xattr_bucket(struct inode *inode, | |
85db90e7 | 4397 | handle_t *handle, |
01225596 TM |
4398 | struct ocfs2_xattr_bucket *bucket) |
4399 | { | |
4400 | int ret, i; | |
199799a3 | 4401 | size_t end, offset, len; |
01225596 TM |
4402 | struct ocfs2_xattr_header *xh; |
4403 | char *entries, *buf, *bucket_buf = NULL; | |
9c7759aa | 4404 | u64 blkno = bucket_blkno(bucket); |
01225596 | 4405 | u16 xh_free_start; |
01225596 | 4406 | size_t blocksize = inode->i_sb->s_blocksize; |
01225596 | 4407 | struct ocfs2_xattr_entry *xe; |
01225596 TM |
4408 | |
4409 | /* | |
4410 | * In order to make the operation more efficient and generic, | |
4411 | * we copy all the blocks into a contiguous memory and do the | |
4412 | * defragment there, so if anything is error, we will not touch | |
4413 | * the real block. | |
4414 | */ | |
4415 | bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); | |
4416 | if (!bucket_buf) { | |
4417 | ret = -EIO; | |
4418 | goto out; | |
4419 | } | |
4420 | ||
4421 | buf = bucket_buf; | |
1c32a2fd TM |
4422 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4423 | memcpy(buf, bucket_block(bucket, i), blocksize); | |
01225596 | 4424 | |
1c32a2fd | 4425 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, |
161d6f30 JB |
4426 | OCFS2_JOURNAL_ACCESS_WRITE); |
4427 | if (ret < 0) { | |
4428 | mlog_errno(ret); | |
85db90e7 | 4429 | goto out; |
01225596 TM |
4430 | } |
4431 | ||
4432 | xh = (struct ocfs2_xattr_header *)bucket_buf; | |
4433 | entries = (char *)xh->xh_entries; | |
4434 | xh_free_start = le16_to_cpu(xh->xh_free_start); | |
4435 | ||
402b4183 | 4436 | trace_ocfs2_defrag_xattr_bucket( |
de29c085 MF |
4437 | (unsigned long long)blkno, le16_to_cpu(xh->xh_count), |
4438 | xh_free_start, le16_to_cpu(xh->xh_name_value_len)); | |
01225596 TM |
4439 | |
4440 | /* | |
4441 | * sort all the entries by their offset. | |
4442 | * the largest will be the first, so that we can | |
4443 | * move them to the end one by one. | |
4444 | */ | |
4445 | sort(entries, le16_to_cpu(xh->xh_count), | |
4446 | sizeof(struct ocfs2_xattr_entry), | |
4447 | cmp_xe_offset, swap_xe); | |
4448 | ||
4449 | /* Move all name/values to the end of the bucket. */ | |
4450 | xe = xh->xh_entries; | |
4451 | end = OCFS2_XATTR_BUCKET_SIZE; | |
4452 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { | |
4453 | offset = le16_to_cpu(xe->xe_name_offset); | |
199799a3 | 4454 | len = namevalue_size_xe(xe); |
01225596 TM |
4455 | |
4456 | /* | |
4457 | * We must make sure that the name/value pair | |
4458 | * exist in the same block. So adjust end to | |
4459 | * the previous block end if needed. | |
4460 | */ | |
4461 | if (((end - len) / blocksize != | |
4462 | (end - 1) / blocksize)) | |
4463 | end = end - end % blocksize; | |
4464 | ||
4465 | if (end > offset + len) { | |
4466 | memmove(bucket_buf + end - len, | |
4467 | bucket_buf + offset, len); | |
4468 | xe->xe_name_offset = cpu_to_le16(end - len); | |
4469 | } | |
4470 | ||
4471 | mlog_bug_on_msg(end < offset + len, "Defrag check failed for " | |
4472 | "bucket %llu\n", (unsigned long long)blkno); | |
4473 | ||
4474 | end -= len; | |
4475 | } | |
4476 | ||
4477 | mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " | |
4478 | "bucket %llu\n", (unsigned long long)blkno); | |
4479 | ||
4480 | if (xh_free_start == end) | |
85db90e7 | 4481 | goto out; |
01225596 TM |
4482 | |
4483 | memset(bucket_buf + xh_free_start, 0, end - xh_free_start); | |
4484 | xh->xh_free_start = cpu_to_le16(end); | |
4485 | ||
4486 | /* sort the entries by their name_hash. */ | |
4487 | sort(entries, le16_to_cpu(xh->xh_count), | |
4488 | sizeof(struct ocfs2_xattr_entry), | |
4489 | cmp_xe, swap_xe); | |
4490 | ||
4491 | buf = bucket_buf; | |
1c32a2fd TM |
4492 | for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) |
4493 | memcpy(bucket_block(bucket, i), buf, blocksize); | |
4494 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
01225596 | 4495 | |
01225596 | 4496 | out: |
01225596 TM |
4497 | kfree(bucket_buf); |
4498 | return ret; | |
4499 | } | |
4500 | ||
4501 | /* | |
b5c03e74 JB |
4502 | * prev_blkno points to the start of an existing extent. new_blkno |
4503 | * points to a newly allocated extent. Because we know each of our | |
4504 | * clusters contains more than bucket, we can easily split one cluster | |
4505 | * at a bucket boundary. So we take the last cluster of the existing | |
4506 | * extent and split it down the middle. We move the last half of the | |
4507 | * buckets in the last cluster of the existing extent over to the new | |
4508 | * extent. | |
01225596 | 4509 | * |
b5c03e74 JB |
4510 | * first_bh is the buffer at prev_blkno so we can update the existing |
4511 | * extent's bucket count. header_bh is the bucket were we were hoping | |
4512 | * to insert our xattr. If the bucket move places the target in the new | |
4513 | * extent, we'll update first_bh and header_bh after modifying the old | |
4514 | * extent. | |
4515 | * | |
4516 | * first_hash will be set as the 1st xe's name_hash in the new extent. | |
01225596 TM |
4517 | */ |
4518 | static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, | |
4519 | handle_t *handle, | |
41cb8148 JB |
4520 | struct ocfs2_xattr_bucket *first, |
4521 | struct ocfs2_xattr_bucket *target, | |
01225596 | 4522 | u64 new_blkno, |
01225596 TM |
4523 | u32 num_clusters, |
4524 | u32 *first_hash) | |
4525 | { | |
c58b6032 | 4526 | int ret; |
41cb8148 JB |
4527 | struct super_block *sb = inode->i_sb; |
4528 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(sb); | |
4529 | int num_buckets = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(sb)); | |
b5c03e74 | 4530 | int to_move = num_buckets / 2; |
c58b6032 | 4531 | u64 src_blkno; |
41cb8148 JB |
4532 | u64 last_cluster_blkno = bucket_blkno(first) + |
4533 | ((num_clusters - 1) * ocfs2_clusters_to_blocks(sb, 1)); | |
01225596 | 4534 | |
41cb8148 JB |
4535 | BUG_ON(le16_to_cpu(bucket_xh(first)->xh_num_buckets) < num_buckets); |
4536 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE == OCFS2_SB(sb)->s_clustersize); | |
01225596 | 4537 | |
402b4183 TM |
4538 | trace_ocfs2_mv_xattr_bucket_cross_cluster( |
4539 | (unsigned long long)last_cluster_blkno, | |
4540 | (unsigned long long)new_blkno); | |
01225596 | 4541 | |
41cb8148 | 4542 | ret = ocfs2_mv_xattr_buckets(inode, handle, bucket_blkno(first), |
c58b6032 JB |
4543 | last_cluster_blkno, new_blkno, |
4544 | to_move, first_hash); | |
01225596 TM |
4545 | if (ret) { |
4546 | mlog_errno(ret); | |
4547 | goto out; | |
4548 | } | |
4549 | ||
c58b6032 JB |
4550 | /* This is the first bucket that got moved */ |
4551 | src_blkno = last_cluster_blkno + (to_move * blks_per_bucket); | |
01225596 | 4552 | |
b5c03e74 | 4553 | /* |
c58b6032 | 4554 | * If the target bucket was part of the moved buckets, we need to |
41cb8148 | 4555 | * update first and target. |
b5c03e74 | 4556 | */ |
41cb8148 | 4557 | if (bucket_blkno(target) >= src_blkno) { |
b5c03e74 JB |
4558 | /* Find the block for the new target bucket */ |
4559 | src_blkno = new_blkno + | |
41cb8148 JB |
4560 | (bucket_blkno(target) - src_blkno); |
4561 | ||
4562 | ocfs2_xattr_bucket_relse(first); | |
4563 | ocfs2_xattr_bucket_relse(target); | |
01225596 | 4564 | |
b5c03e74 | 4565 | /* |
c58b6032 | 4566 | * These shouldn't fail - the buffers are in the |
b5c03e74 JB |
4567 | * journal from ocfs2_cp_xattr_bucket(). |
4568 | */ | |
41cb8148 | 4569 | ret = ocfs2_read_xattr_bucket(first, new_blkno); |
c58b6032 JB |
4570 | if (ret) { |
4571 | mlog_errno(ret); | |
4572 | goto out; | |
4573 | } | |
41cb8148 JB |
4574 | ret = ocfs2_read_xattr_bucket(target, src_blkno); |
4575 | if (ret) | |
b5c03e74 | 4576 | mlog_errno(ret); |
01225596 | 4577 | |
01225596 TM |
4578 | } |
4579 | ||
01225596 | 4580 | out: |
01225596 TM |
4581 | return ret; |
4582 | } | |
4583 | ||
01225596 | 4584 | /* |
80bcaf34 TM |
4585 | * Find the suitable pos when we divide a bucket into 2. |
4586 | * We have to make sure the xattrs with the same hash value exist | |
4587 | * in the same bucket. | |
4588 | * | |
4589 | * If this ocfs2_xattr_header covers more than one hash value, find a | |
4590 | * place where the hash value changes. Try to find the most even split. | |
4591 | * The most common case is that all entries have different hash values, | |
4592 | * and the first check we make will find a place to split. | |
4593 | */ | |
4594 | static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) | |
4595 | { | |
4596 | struct ocfs2_xattr_entry *entries = xh->xh_entries; | |
4597 | int count = le16_to_cpu(xh->xh_count); | |
4598 | int delta, middle = count / 2; | |
4599 | ||
4600 | /* | |
4601 | * We start at the middle. Each step gets farther away in both | |
4602 | * directions. We therefore hit the change in hash value | |
4603 | * nearest to the middle. Note that this loop does not execute for | |
4604 | * count < 2. | |
4605 | */ | |
4606 | for (delta = 0; delta < middle; delta++) { | |
4607 | /* Let's check delta earlier than middle */ | |
4608 | if (cmp_xe(&entries[middle - delta - 1], | |
4609 | &entries[middle - delta])) | |
4610 | return middle - delta; | |
4611 | ||
4612 | /* For even counts, don't walk off the end */ | |
4613 | if ((middle + delta + 1) == count) | |
4614 | continue; | |
4615 | ||
4616 | /* Now try delta past middle */ | |
4617 | if (cmp_xe(&entries[middle + delta], | |
4618 | &entries[middle + delta + 1])) | |
4619 | return middle + delta + 1; | |
4620 | } | |
4621 | ||
4622 | /* Every entry had the same hash */ | |
4623 | return count; | |
4624 | } | |
4625 | ||
4626 | /* | |
4627 | * Move some xattrs in old bucket(blk) to new bucket(new_blk). | |
01225596 | 4628 | * first_hash will record the 1st hash of the new bucket. |
80bcaf34 TM |
4629 | * |
4630 | * Normally half of the xattrs will be moved. But we have to make | |
4631 | * sure that the xattrs with the same hash value are stored in the | |
4632 | * same bucket. If all the xattrs in this bucket have the same hash | |
4633 | * value, the new bucket will be initialized as an empty one and the | |
4634 | * first_hash will be initialized as (hash_value+1). | |
01225596 | 4635 | */ |
80bcaf34 TM |
4636 | static int ocfs2_divide_xattr_bucket(struct inode *inode, |
4637 | handle_t *handle, | |
4638 | u64 blk, | |
4639 | u64 new_blk, | |
4640 | u32 *first_hash, | |
4641 | int new_bucket_head) | |
01225596 TM |
4642 | { |
4643 | int ret, i; | |
199799a3 | 4644 | int count, start, len, name_value_len = 0, name_offset = 0; |
ba937127 | 4645 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4646 | struct ocfs2_xattr_header *xh; |
4647 | struct ocfs2_xattr_entry *xe; | |
4648 | int blocksize = inode->i_sb->s_blocksize; | |
4649 | ||
402b4183 TM |
4650 | trace_ocfs2_divide_xattr_bucket_begin((unsigned long long)blk, |
4651 | (unsigned long long)new_blk); | |
01225596 | 4652 | |
ba937127 JB |
4653 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4654 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4655 | if (!s_bucket || !t_bucket) { | |
4656 | ret = -ENOMEM; | |
4657 | mlog_errno(ret); | |
4658 | goto out; | |
4659 | } | |
01225596 | 4660 | |
ba937127 | 4661 | ret = ocfs2_read_xattr_bucket(s_bucket, blk); |
01225596 TM |
4662 | if (ret) { |
4663 | mlog_errno(ret); | |
4664 | goto out; | |
4665 | } | |
4666 | ||
ba937127 | 4667 | ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, |
1224be02 | 4668 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
4669 | if (ret) { |
4670 | mlog_errno(ret); | |
4671 | goto out; | |
4672 | } | |
4673 | ||
784b816a JB |
4674 | /* |
4675 | * Even if !new_bucket_head, we're overwriting t_bucket. Thus, | |
4676 | * there's no need to read it. | |
4677 | */ | |
9c339255 | 4678 | ret = ocfs2_init_xattr_bucket(t_bucket, new_blk, new_bucket_head); |
01225596 TM |
4679 | if (ret) { |
4680 | mlog_errno(ret); | |
4681 | goto out; | |
4682 | } | |
4683 | ||
2b656c1d JB |
4684 | /* |
4685 | * Hey, if we're overwriting t_bucket, what difference does | |
4686 | * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the | |
4687 | * same part of ocfs2_cp_xattr_bucket(). | |
4688 | */ | |
ba937127 | 4689 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4690 | new_bucket_head ? |
4691 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4692 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4693 | if (ret) { | |
4694 | mlog_errno(ret); | |
4695 | goto out; | |
01225596 TM |
4696 | } |
4697 | ||
ba937127 | 4698 | xh = bucket_xh(s_bucket); |
80bcaf34 TM |
4699 | count = le16_to_cpu(xh->xh_count); |
4700 | start = ocfs2_xattr_find_divide_pos(xh); | |
4701 | ||
4702 | if (start == count) { | |
4703 | xe = &xh->xh_entries[start-1]; | |
4704 | ||
4705 | /* | |
4706 | * initialized a new empty bucket here. | |
4707 | * The hash value is set as one larger than | |
4708 | * that of the last entry in the previous bucket. | |
4709 | */ | |
ba937127 JB |
4710 | for (i = 0; i < t_bucket->bu_blocks; i++) |
4711 | memset(bucket_block(t_bucket, i), 0, blocksize); | |
80bcaf34 | 4712 | |
ba937127 | 4713 | xh = bucket_xh(t_bucket); |
80bcaf34 TM |
4714 | xh->xh_free_start = cpu_to_le16(blocksize); |
4715 | xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; | |
4716 | le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); | |
4717 | ||
4718 | goto set_num_buckets; | |
4719 | } | |
4720 | ||
01225596 | 4721 | /* copy the whole bucket to the new first. */ |
ba937127 | 4722 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
01225596 TM |
4723 | |
4724 | /* update the new bucket. */ | |
ba937127 | 4725 | xh = bucket_xh(t_bucket); |
01225596 TM |
4726 | |
4727 | /* | |
4728 | * Calculate the total name/value len and xh_free_start for | |
4729 | * the old bucket first. | |
4730 | */ | |
4731 | name_offset = OCFS2_XATTR_BUCKET_SIZE; | |
4732 | name_value_len = 0; | |
4733 | for (i = 0; i < start; i++) { | |
4734 | xe = &xh->xh_entries[i]; | |
199799a3 | 4735 | name_value_len += namevalue_size_xe(xe); |
01225596 TM |
4736 | if (le16_to_cpu(xe->xe_name_offset) < name_offset) |
4737 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
4738 | } | |
4739 | ||
4740 | /* | |
4741 | * Now begin the modification to the new bucket. | |
4742 | * | |
4743 | * In the new bucket, We just move the xattr entry to the beginning | |
4744 | * and don't touch the name/value. So there will be some holes in the | |
4745 | * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is | |
4746 | * called. | |
4747 | */ | |
4748 | xe = &xh->xh_entries[start]; | |
4749 | len = sizeof(struct ocfs2_xattr_entry) * (count - start); | |
402b4183 TM |
4750 | trace_ocfs2_divide_xattr_bucket_move(len, |
4751 | (int)((char *)xe - (char *)xh), | |
4752 | (int)((char *)xh->xh_entries - (char *)xh)); | |
01225596 TM |
4753 | memmove((char *)xh->xh_entries, (char *)xe, len); |
4754 | xe = &xh->xh_entries[count - start]; | |
4755 | len = sizeof(struct ocfs2_xattr_entry) * start; | |
4756 | memset((char *)xe, 0, len); | |
4757 | ||
4758 | le16_add_cpu(&xh->xh_count, -start); | |
4759 | le16_add_cpu(&xh->xh_name_value_len, -name_value_len); | |
4760 | ||
4761 | /* Calculate xh_free_start for the new bucket. */ | |
4762 | xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); | |
4763 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
4764 | xe = &xh->xh_entries[i]; | |
01225596 TM |
4765 | if (le16_to_cpu(xe->xe_name_offset) < |
4766 | le16_to_cpu(xh->xh_free_start)) | |
4767 | xh->xh_free_start = xe->xe_name_offset; | |
4768 | } | |
4769 | ||
80bcaf34 | 4770 | set_num_buckets: |
01225596 TM |
4771 | /* set xh->xh_num_buckets for the new xh. */ |
4772 | if (new_bucket_head) | |
4773 | xh->xh_num_buckets = cpu_to_le16(1); | |
4774 | else | |
4775 | xh->xh_num_buckets = 0; | |
4776 | ||
ba937127 | 4777 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); |
01225596 TM |
4778 | |
4779 | /* store the first_hash of the new bucket. */ | |
4780 | if (first_hash) | |
4781 | *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); | |
4782 | ||
4783 | /* | |
80bcaf34 TM |
4784 | * Now only update the 1st block of the old bucket. If we |
4785 | * just added a new empty bucket, there is no need to modify | |
4786 | * it. | |
01225596 | 4787 | */ |
80bcaf34 TM |
4788 | if (start == count) |
4789 | goto out; | |
4790 | ||
ba937127 | 4791 | xh = bucket_xh(s_bucket); |
01225596 TM |
4792 | memset(&xh->xh_entries[start], 0, |
4793 | sizeof(struct ocfs2_xattr_entry) * (count - start)); | |
4794 | xh->xh_count = cpu_to_le16(start); | |
4795 | xh->xh_free_start = cpu_to_le16(name_offset); | |
4796 | xh->xh_name_value_len = cpu_to_le16(name_value_len); | |
4797 | ||
ba937127 | 4798 | ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); |
01225596 TM |
4799 | |
4800 | out: | |
ba937127 JB |
4801 | ocfs2_xattr_bucket_free(s_bucket); |
4802 | ocfs2_xattr_bucket_free(t_bucket); | |
01225596 TM |
4803 | |
4804 | return ret; | |
4805 | } | |
4806 | ||
4807 | /* | |
4808 | * Copy xattr from one bucket to another bucket. | |
4809 | * | |
4810 | * The caller must make sure that the journal transaction | |
4811 | * has enough space for journaling. | |
4812 | */ | |
4813 | static int ocfs2_cp_xattr_bucket(struct inode *inode, | |
4814 | handle_t *handle, | |
4815 | u64 s_blkno, | |
4816 | u64 t_blkno, | |
4817 | int t_is_new) | |
4818 | { | |
4980c6da | 4819 | int ret; |
ba937127 | 4820 | struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; |
01225596 TM |
4821 | |
4822 | BUG_ON(s_blkno == t_blkno); | |
4823 | ||
402b4183 TM |
4824 | trace_ocfs2_cp_xattr_bucket((unsigned long long)s_blkno, |
4825 | (unsigned long long)t_blkno, | |
4826 | t_is_new); | |
01225596 | 4827 | |
ba937127 JB |
4828 | s_bucket = ocfs2_xattr_bucket_new(inode); |
4829 | t_bucket = ocfs2_xattr_bucket_new(inode); | |
4830 | if (!s_bucket || !t_bucket) { | |
4831 | ret = -ENOMEM; | |
4832 | mlog_errno(ret); | |
4833 | goto out; | |
4834 | } | |
92de109a | 4835 | |
ba937127 | 4836 | ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); |
01225596 TM |
4837 | if (ret) |
4838 | goto out; | |
4839 | ||
784b816a JB |
4840 | /* |
4841 | * Even if !t_is_new, we're overwriting t_bucket. Thus, | |
4842 | * there's no need to read it. | |
4843 | */ | |
9c339255 | 4844 | ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno, t_is_new); |
01225596 TM |
4845 | if (ret) |
4846 | goto out; | |
4847 | ||
2b656c1d JB |
4848 | /* |
4849 | * Hey, if we're overwriting t_bucket, what difference does | |
4850 | * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new | |
874d65af JB |
4851 | * cluster to fill, we came here from |
4852 | * ocfs2_mv_xattr_buckets(), and it is really new - | |
4853 | * ACCESS_CREATE is required. But we also might have moved data | |
4854 | * out of t_bucket before extending back into it. | |
4855 | * ocfs2_add_new_xattr_bucket() can do this - its call to | |
4856 | * ocfs2_add_new_xattr_cluster() may have created a new extent | |
2b656c1d JB |
4857 | * and copied out the end of the old extent. Then it re-extends |
4858 | * the old extent back to create space for new xattrs. That's | |
4859 | * how we get here, and the bucket isn't really new. | |
4860 | */ | |
ba937127 | 4861 | ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, |
1224be02 JB |
4862 | t_is_new ? |
4863 | OCFS2_JOURNAL_ACCESS_CREATE : | |
4864 | OCFS2_JOURNAL_ACCESS_WRITE); | |
4865 | if (ret) | |
4866 | goto out; | |
01225596 | 4867 | |
ba937127 JB |
4868 | ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); |
4869 | ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); | |
01225596 TM |
4870 | |
4871 | out: | |
ba937127 JB |
4872 | ocfs2_xattr_bucket_free(t_bucket); |
4873 | ocfs2_xattr_bucket_free(s_bucket); | |
01225596 TM |
4874 | |
4875 | return ret; | |
4876 | } | |
4877 | ||
4878 | /* | |
874d65af JB |
4879 | * src_blk points to the start of an existing extent. last_blk points to |
4880 | * last cluster in that extent. to_blk points to a newly allocated | |
54ecb6b6 JB |
4881 | * extent. We copy the buckets from the cluster at last_blk to the new |
4882 | * extent. If start_bucket is non-zero, we skip that many buckets before | |
4883 | * we start copying. The new extent's xh_num_buckets gets set to the | |
4884 | * number of buckets we copied. The old extent's xh_num_buckets shrinks | |
4885 | * by the same amount. | |
01225596 | 4886 | */ |
54ecb6b6 JB |
4887 | static int ocfs2_mv_xattr_buckets(struct inode *inode, handle_t *handle, |
4888 | u64 src_blk, u64 last_blk, u64 to_blk, | |
4889 | unsigned int start_bucket, | |
4890 | u32 *first_hash) | |
01225596 TM |
4891 | { |
4892 | int i, ret, credits; | |
4893 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
15d60929 | 4894 | int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
01225596 | 4895 | int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
15d60929 | 4896 | struct ocfs2_xattr_bucket *old_first, *new_first; |
01225596 | 4897 | |
402b4183 TM |
4898 | trace_ocfs2_mv_xattr_buckets((unsigned long long)last_blk, |
4899 | (unsigned long long)to_blk); | |
01225596 | 4900 | |
54ecb6b6 JB |
4901 | BUG_ON(start_bucket >= num_buckets); |
4902 | if (start_bucket) { | |
4903 | num_buckets -= start_bucket; | |
4904 | last_blk += (start_bucket * blks_per_bucket); | |
4905 | } | |
4906 | ||
15d60929 JB |
4907 | /* The first bucket of the original extent */ |
4908 | old_first = ocfs2_xattr_bucket_new(inode); | |
4909 | /* The first bucket of the new extent */ | |
4910 | new_first = ocfs2_xattr_bucket_new(inode); | |
4911 | if (!old_first || !new_first) { | |
4912 | ret = -ENOMEM; | |
4913 | mlog_errno(ret); | |
4914 | goto out; | |
4915 | } | |
4916 | ||
874d65af | 4917 | ret = ocfs2_read_xattr_bucket(old_first, src_blk); |
15d60929 JB |
4918 | if (ret) { |
4919 | mlog_errno(ret); | |
4920 | goto out; | |
4921 | } | |
4922 | ||
01225596 | 4923 | /* |
54ecb6b6 JB |
4924 | * We need to update the first bucket of the old extent and all |
4925 | * the buckets going to the new extent. | |
01225596 | 4926 | */ |
c901fb00 | 4927 | credits = ((num_buckets + 1) * blks_per_bucket); |
01225596 TM |
4928 | ret = ocfs2_extend_trans(handle, credits); |
4929 | if (ret) { | |
4930 | mlog_errno(ret); | |
4931 | goto out; | |
4932 | } | |
4933 | ||
15d60929 JB |
4934 | ret = ocfs2_xattr_bucket_journal_access(handle, old_first, |
4935 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4936 | if (ret) { |
4937 | mlog_errno(ret); | |
4938 | goto out; | |
4939 | } | |
4940 | ||
4941 | for (i = 0; i < num_buckets; i++) { | |
4942 | ret = ocfs2_cp_xattr_bucket(inode, handle, | |
874d65af | 4943 | last_blk + (i * blks_per_bucket), |
15d60929 JB |
4944 | to_blk + (i * blks_per_bucket), |
4945 | 1); | |
01225596 TM |
4946 | if (ret) { |
4947 | mlog_errno(ret); | |
4948 | goto out; | |
4949 | } | |
01225596 TM |
4950 | } |
4951 | ||
15d60929 JB |
4952 | /* |
4953 | * Get the new bucket ready before we dirty anything | |
4954 | * (This actually shouldn't fail, because we already dirtied | |
4955 | * it once in ocfs2_cp_xattr_bucket()). | |
4956 | */ | |
4957 | ret = ocfs2_read_xattr_bucket(new_first, to_blk); | |
4958 | if (ret) { | |
01225596 TM |
4959 | mlog_errno(ret); |
4960 | goto out; | |
4961 | } | |
15d60929 JB |
4962 | ret = ocfs2_xattr_bucket_journal_access(handle, new_first, |
4963 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
4964 | if (ret) { |
4965 | mlog_errno(ret); | |
4966 | goto out; | |
4967 | } | |
4968 | ||
15d60929 JB |
4969 | /* Now update the headers */ |
4970 | le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); | |
4971 | ocfs2_xattr_bucket_journal_dirty(handle, old_first); | |
01225596 | 4972 | |
15d60929 JB |
4973 | bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); |
4974 | ocfs2_xattr_bucket_journal_dirty(handle, new_first); | |
01225596 TM |
4975 | |
4976 | if (first_hash) | |
15d60929 JB |
4977 | *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); |
4978 | ||
01225596 | 4979 | out: |
15d60929 JB |
4980 | ocfs2_xattr_bucket_free(new_first); |
4981 | ocfs2_xattr_bucket_free(old_first); | |
01225596 TM |
4982 | return ret; |
4983 | } | |
4984 | ||
4985 | /* | |
80bcaf34 | 4986 | * Move some xattrs in this cluster to the new cluster. |
01225596 TM |
4987 | * This function should only be called when bucket size == cluster size. |
4988 | * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. | |
4989 | */ | |
80bcaf34 TM |
4990 | static int ocfs2_divide_xattr_cluster(struct inode *inode, |
4991 | handle_t *handle, | |
4992 | u64 prev_blk, | |
4993 | u64 new_blk, | |
4994 | u32 *first_hash) | |
01225596 TM |
4995 | { |
4996 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
c901fb00 | 4997 | int ret, credits = 2 * blk_per_bucket; |
01225596 TM |
4998 | |
4999 | BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); | |
5000 | ||
5001 | ret = ocfs2_extend_trans(handle, credits); | |
5002 | if (ret) { | |
5003 | mlog_errno(ret); | |
5004 | return ret; | |
5005 | } | |
5006 | ||
5007 | /* Move half of the xattr in start_blk to the next bucket. */ | |
80bcaf34 TM |
5008 | return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, |
5009 | new_blk, first_hash, 1); | |
01225596 TM |
5010 | } |
5011 | ||
5012 | /* | |
5013 | * Move some xattrs from the old cluster to the new one since they are not | |
5014 | * contiguous in ocfs2 xattr tree. | |
5015 | * | |
5016 | * new_blk starts a new separate cluster, and we will move some xattrs from | |
5017 | * prev_blk to it. v_start will be set as the first name hash value in this | |
5018 | * new cluster so that it can be used as e_cpos during tree insertion and | |
5019 | * don't collide with our original b-tree operations. first_bh and header_bh | |
5020 | * will also be updated since they will be used in ocfs2_extend_xattr_bucket | |
5021 | * to extend the insert bucket. | |
5022 | * | |
5023 | * The problem is how much xattr should we move to the new one and when should | |
5024 | * we update first_bh and header_bh? | |
5025 | * 1. If cluster size > bucket size, that means the previous cluster has more | |
5026 | * than 1 bucket, so just move half nums of bucket into the new cluster and | |
5027 | * update the first_bh and header_bh if the insert bucket has been moved | |
5028 | * to the new cluster. | |
5029 | * 2. If cluster_size == bucket_size: | |
5030 | * a) If the previous extent rec has more than one cluster and the insert | |
5031 | * place isn't in the last cluster, copy the entire last cluster to the | |
5032 | * new one. This time, we don't need to upate the first_bh and header_bh | |
5033 | * since they will not be moved into the new cluster. | |
5034 | * b) Otherwise, move the bottom half of the xattrs in the last cluster into | |
5035 | * the new one. And we set the extend flag to zero if the insert place is | |
5036 | * moved into the new allocated cluster since no extend is needed. | |
5037 | */ | |
5038 | static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, | |
5039 | handle_t *handle, | |
012ee910 JB |
5040 | struct ocfs2_xattr_bucket *first, |
5041 | struct ocfs2_xattr_bucket *target, | |
01225596 | 5042 | u64 new_blk, |
01225596 TM |
5043 | u32 prev_clusters, |
5044 | u32 *v_start, | |
5045 | int *extend) | |
5046 | { | |
92cf3adf | 5047 | int ret; |
01225596 | 5048 | |
402b4183 TM |
5049 | trace_ocfs2_adjust_xattr_cross_cluster( |
5050 | (unsigned long long)bucket_blkno(first), | |
5051 | (unsigned long long)new_blk, prev_clusters); | |
01225596 | 5052 | |
41cb8148 | 5053 | if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) { |
01225596 TM |
5054 | ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, |
5055 | handle, | |
41cb8148 | 5056 | first, target, |
01225596 | 5057 | new_blk, |
01225596 TM |
5058 | prev_clusters, |
5059 | v_start); | |
012ee910 | 5060 | if (ret) |
41cb8148 | 5061 | mlog_errno(ret); |
41cb8148 | 5062 | } else { |
92cf3adf JB |
5063 | /* The start of the last cluster in the first extent */ |
5064 | u64 last_blk = bucket_blkno(first) + | |
5065 | ((prev_clusters - 1) * | |
5066 | ocfs2_clusters_to_blocks(inode->i_sb, 1)); | |
01225596 | 5067 | |
012ee910 | 5068 | if (prev_clusters > 1 && bucket_blkno(target) != last_blk) { |
874d65af | 5069 | ret = ocfs2_mv_xattr_buckets(inode, handle, |
92cf3adf | 5070 | bucket_blkno(first), |
54ecb6b6 | 5071 | last_blk, new_blk, 0, |
01225596 | 5072 | v_start); |
012ee910 JB |
5073 | if (ret) |
5074 | mlog_errno(ret); | |
5075 | } else { | |
80bcaf34 TM |
5076 | ret = ocfs2_divide_xattr_cluster(inode, handle, |
5077 | last_blk, new_blk, | |
5078 | v_start); | |
012ee910 JB |
5079 | if (ret) |
5080 | mlog_errno(ret); | |
01225596 | 5081 | |
92cf3adf | 5082 | if ((bucket_blkno(target) == last_blk) && extend) |
01225596 TM |
5083 | *extend = 0; |
5084 | } | |
5085 | } | |
5086 | ||
5087 | return ret; | |
5088 | } | |
5089 | ||
5090 | /* | |
5091 | * Add a new cluster for xattr storage. | |
5092 | * | |
5093 | * If the new cluster is contiguous with the previous one, it will be | |
5094 | * appended to the same extent record, and num_clusters will be updated. | |
5095 | * If not, we will insert a new extent for it and move some xattrs in | |
5096 | * the last cluster into the new allocated one. | |
5097 | * We also need to limit the maximum size of a btree leaf, otherwise we'll | |
5098 | * lose the benefits of hashing because we'll have to search large leaves. | |
5099 | * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, | |
5100 | * if it's bigger). | |
5101 | * | |
5102 | * first_bh is the first block of the previous extent rec and header_bh | |
5103 | * indicates the bucket we will insert the new xattrs. They will be updated | |
5104 | * when the header_bh is moved into the new cluster. | |
5105 | */ | |
5106 | static int ocfs2_add_new_xattr_cluster(struct inode *inode, | |
5107 | struct buffer_head *root_bh, | |
ed29c0ca JB |
5108 | struct ocfs2_xattr_bucket *first, |
5109 | struct ocfs2_xattr_bucket *target, | |
01225596 TM |
5110 | u32 *num_clusters, |
5111 | u32 prev_cpos, | |
78f30c31 TM |
5112 | int *extend, |
5113 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5114 | { |
85db90e7 | 5115 | int ret; |
01225596 TM |
5116 | u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
5117 | u32 prev_clusters = *num_clusters; | |
5118 | u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; | |
5119 | u64 block; | |
85db90e7 | 5120 | handle_t *handle = ctxt->handle; |
01225596 | 5121 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
f99b9b7c | 5122 | struct ocfs2_extent_tree et; |
01225596 | 5123 | |
402b4183 TM |
5124 | trace_ocfs2_add_new_xattr_cluster_begin( |
5125 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
5126 | (unsigned long long)bucket_blkno(first), | |
5127 | prev_cpos, prev_clusters); | |
01225596 | 5128 | |
5e404e9e | 5129 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
f99b9b7c | 5130 | |
0cf2f763 | 5131 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5132 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5133 | if (ret < 0) { |
5134 | mlog_errno(ret); | |
5135 | goto leave; | |
5136 | } | |
5137 | ||
1ed9b777 | 5138 | ret = __ocfs2_claim_clusters(handle, ctxt->data_ac, 1, |
01225596 TM |
5139 | clusters_to_add, &bit_off, &num_bits); |
5140 | if (ret < 0) { | |
5141 | if (ret != -ENOSPC) | |
5142 | mlog_errno(ret); | |
5143 | goto leave; | |
5144 | } | |
5145 | ||
5146 | BUG_ON(num_bits > clusters_to_add); | |
5147 | ||
5148 | block = ocfs2_clusters_to_blocks(osb->sb, bit_off); | |
402b4183 | 5149 | trace_ocfs2_add_new_xattr_cluster((unsigned long long)block, num_bits); |
01225596 | 5150 | |
ed29c0ca | 5151 | if (bucket_blkno(first) + (prev_clusters * bpc) == block && |
01225596 TM |
5152 | (prev_clusters + num_bits) << osb->s_clustersize_bits <= |
5153 | OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { | |
5154 | /* | |
5155 | * If this cluster is contiguous with the old one and | |
5156 | * adding this new cluster, we don't surpass the limit of | |
5157 | * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be | |
5158 | * initialized and used like other buckets in the previous | |
5159 | * cluster. | |
5160 | * So add it as a contiguous one. The caller will handle | |
5161 | * its init process. | |
5162 | */ | |
5163 | v_start = prev_cpos + prev_clusters; | |
5164 | *num_clusters = prev_clusters + num_bits; | |
01225596 TM |
5165 | } else { |
5166 | ret = ocfs2_adjust_xattr_cross_cluster(inode, | |
5167 | handle, | |
012ee910 JB |
5168 | first, |
5169 | target, | |
01225596 | 5170 | block, |
01225596 TM |
5171 | prev_clusters, |
5172 | &v_start, | |
5173 | extend); | |
5174 | if (ret) { | |
5175 | mlog_errno(ret); | |
5176 | goto leave; | |
5177 | } | |
5178 | } | |
5179 | ||
402b4183 TM |
5180 | trace_ocfs2_add_new_xattr_cluster_insert((unsigned long long)block, |
5181 | v_start, num_bits); | |
cc79d8c1 | 5182 | ret = ocfs2_insert_extent(handle, &et, v_start, block, |
78f30c31 | 5183 | num_bits, 0, ctxt->meta_ac); |
01225596 TM |
5184 | if (ret < 0) { |
5185 | mlog_errno(ret); | |
5186 | goto leave; | |
5187 | } | |
5188 | ||
ec20cec7 | 5189 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5190 | |
5191 | leave: | |
01225596 TM |
5192 | return ret; |
5193 | } | |
5194 | ||
5195 | /* | |
92de109a JB |
5196 | * We are given an extent. 'first' is the bucket at the very front of |
5197 | * the extent. The extent has space for an additional bucket past | |
5198 | * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number | |
5199 | * of the target bucket. We wish to shift every bucket past the target | |
5200 | * down one, filling in that additional space. When we get back to the | |
5201 | * target, we split the target between itself and the now-empty bucket | |
5202 | * at target+1 (aka, target_blkno + blks_per_bucket). | |
01225596 TM |
5203 | */ |
5204 | static int ocfs2_extend_xattr_bucket(struct inode *inode, | |
85db90e7 | 5205 | handle_t *handle, |
92de109a JB |
5206 | struct ocfs2_xattr_bucket *first, |
5207 | u64 target_blk, | |
01225596 TM |
5208 | u32 num_clusters) |
5209 | { | |
5210 | int ret, credits; | |
5211 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5212 | u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
92de109a JB |
5213 | u64 end_blk; |
5214 | u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); | |
01225596 | 5215 | |
402b4183 TM |
5216 | trace_ocfs2_extend_xattr_bucket((unsigned long long)target_blk, |
5217 | (unsigned long long)bucket_blkno(first), | |
5218 | num_clusters, new_bucket); | |
01225596 | 5219 | |
92de109a JB |
5220 | /* The extent must have room for an additional bucket */ |
5221 | BUG_ON(new_bucket >= | |
5222 | (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); | |
01225596 | 5223 | |
92de109a JB |
5224 | /* end_blk points to the last existing bucket */ |
5225 | end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); | |
01225596 TM |
5226 | |
5227 | /* | |
92de109a JB |
5228 | * end_blk is the start of the last existing bucket. |
5229 | * Thus, (end_blk - target_blk) covers the target bucket and | |
5230 | * every bucket after it up to, but not including, the last | |
5231 | * existing bucket. Then we add the last existing bucket, the | |
5232 | * new bucket, and the first bucket (3 * blk_per_bucket). | |
01225596 | 5233 | */ |
c901fb00 | 5234 | credits = (end_blk - target_blk) + (3 * blk_per_bucket); |
85db90e7 TM |
5235 | ret = ocfs2_extend_trans(handle, credits); |
5236 | if (ret) { | |
01225596 TM |
5237 | mlog_errno(ret); |
5238 | goto out; | |
5239 | } | |
5240 | ||
92de109a JB |
5241 | ret = ocfs2_xattr_bucket_journal_access(handle, first, |
5242 | OCFS2_JOURNAL_ACCESS_WRITE); | |
01225596 TM |
5243 | if (ret) { |
5244 | mlog_errno(ret); | |
85db90e7 | 5245 | goto out; |
01225596 TM |
5246 | } |
5247 | ||
92de109a | 5248 | while (end_blk != target_blk) { |
01225596 TM |
5249 | ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
5250 | end_blk + blk_per_bucket, 0); | |
5251 | if (ret) | |
85db90e7 | 5252 | goto out; |
01225596 TM |
5253 | end_blk -= blk_per_bucket; |
5254 | } | |
5255 | ||
92de109a JB |
5256 | /* Move half of the xattr in target_blkno to the next bucket. */ |
5257 | ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, | |
5258 | target_blk + blk_per_bucket, NULL, 0); | |
01225596 | 5259 | |
92de109a JB |
5260 | le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); |
5261 | ocfs2_xattr_bucket_journal_dirty(handle, first); | |
01225596 | 5262 | |
01225596 TM |
5263 | out: |
5264 | return ret; | |
5265 | } | |
5266 | ||
5267 | /* | |
91f2033f JB |
5268 | * Add new xattr bucket in an extent record and adjust the buckets |
5269 | * accordingly. xb_bh is the ocfs2_xattr_block, and target is the | |
5270 | * bucket we want to insert into. | |
01225596 | 5271 | * |
91f2033f JB |
5272 | * In the easy case, we will move all the buckets after target down by |
5273 | * one. Half of target's xattrs will be moved to the next bucket. | |
5274 | * | |
5275 | * If current cluster is full, we'll allocate a new one. This may not | |
5276 | * be contiguous. The underlying calls will make sure that there is | |
5277 | * space for the insert, shifting buckets around if necessary. | |
5278 | * 'target' may be moved by those calls. | |
01225596 TM |
5279 | */ |
5280 | static int ocfs2_add_new_xattr_bucket(struct inode *inode, | |
5281 | struct buffer_head *xb_bh, | |
91f2033f | 5282 | struct ocfs2_xattr_bucket *target, |
78f30c31 | 5283 | struct ocfs2_xattr_set_ctxt *ctxt) |
01225596 | 5284 | { |
01225596 TM |
5285 | struct ocfs2_xattr_block *xb = |
5286 | (struct ocfs2_xattr_block *)xb_bh->b_data; | |
5287 | struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; | |
5288 | struct ocfs2_extent_list *el = &xb_root->xt_list; | |
91f2033f JB |
5289 | u32 name_hash = |
5290 | le32_to_cpu(bucket_xh(target)->xh_entries[0].xe_name_hash); | |
ed29c0ca | 5291 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
01225596 TM |
5292 | int ret, num_buckets, extend = 1; |
5293 | u64 p_blkno; | |
5294 | u32 e_cpos, num_clusters; | |
92de109a | 5295 | /* The bucket at the front of the extent */ |
91f2033f | 5296 | struct ocfs2_xattr_bucket *first; |
01225596 | 5297 | |
402b4183 TM |
5298 | trace_ocfs2_add_new_xattr_bucket( |
5299 | (unsigned long long)bucket_blkno(target)); | |
01225596 | 5300 | |
ed29c0ca | 5301 | /* The first bucket of the original extent */ |
92de109a | 5302 | first = ocfs2_xattr_bucket_new(inode); |
91f2033f | 5303 | if (!first) { |
92de109a JB |
5304 | ret = -ENOMEM; |
5305 | mlog_errno(ret); | |
5306 | goto out; | |
5307 | } | |
5308 | ||
01225596 TM |
5309 | ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, |
5310 | &num_clusters, el); | |
5311 | if (ret) { | |
5312 | mlog_errno(ret); | |
5313 | goto out; | |
5314 | } | |
5315 | ||
ed29c0ca | 5316 | ret = ocfs2_read_xattr_bucket(first, p_blkno); |
01225596 TM |
5317 | if (ret) { |
5318 | mlog_errno(ret); | |
5319 | goto out; | |
5320 | } | |
5321 | ||
ed29c0ca JB |
5322 | num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; |
5323 | if (num_buckets == le16_to_cpu(bucket_xh(first)->xh_num_buckets)) { | |
5324 | /* | |
5325 | * This can move first+target if the target bucket moves | |
5326 | * to the new extent. | |
5327 | */ | |
01225596 TM |
5328 | ret = ocfs2_add_new_xattr_cluster(inode, |
5329 | xb_bh, | |
ed29c0ca JB |
5330 | first, |
5331 | target, | |
01225596 TM |
5332 | &num_clusters, |
5333 | e_cpos, | |
78f30c31 TM |
5334 | &extend, |
5335 | ctxt); | |
01225596 TM |
5336 | if (ret) { |
5337 | mlog_errno(ret); | |
5338 | goto out; | |
5339 | } | |
5340 | } | |
5341 | ||
92de109a | 5342 | if (extend) { |
01225596 | 5343 | ret = ocfs2_extend_xattr_bucket(inode, |
85db90e7 | 5344 | ctxt->handle, |
ed29c0ca JB |
5345 | first, |
5346 | bucket_blkno(target), | |
01225596 | 5347 | num_clusters); |
92de109a JB |
5348 | if (ret) |
5349 | mlog_errno(ret); | |
5350 | } | |
5351 | ||
01225596 | 5352 | out: |
92de109a | 5353 | ocfs2_xattr_bucket_free(first); |
ed29c0ca | 5354 | |
01225596 TM |
5355 | return ret; |
5356 | } | |
5357 | ||
01225596 TM |
5358 | /* |
5359 | * Truncate the specified xe_off entry in xattr bucket. | |
5360 | * bucket is indicated by header_bh and len is the new length. | |
5361 | * Both the ocfs2_xattr_value_root and the entry will be updated here. | |
5362 | * | |
5363 | * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. | |
5364 | */ | |
5365 | static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, | |
548b0f22 | 5366 | struct ocfs2_xattr_bucket *bucket, |
01225596 | 5367 | int xe_off, |
78f30c31 TM |
5368 | int len, |
5369 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 TM |
5370 | { |
5371 | int ret, offset; | |
5372 | u64 value_blk; | |
01225596 | 5373 | struct ocfs2_xattr_entry *xe; |
548b0f22 | 5374 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
01225596 | 5375 | size_t blocksize = inode->i_sb->s_blocksize; |
b3e5d379 JB |
5376 | struct ocfs2_xattr_value_buf vb = { |
5377 | .vb_access = ocfs2_journal_access, | |
5378 | }; | |
01225596 TM |
5379 | |
5380 | xe = &xh->xh_entries[xe_off]; | |
5381 | ||
5382 | BUG_ON(!xe || ocfs2_xattr_is_local(xe)); | |
5383 | ||
5384 | offset = le16_to_cpu(xe->xe_name_offset) + | |
5385 | OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5386 | ||
5387 | value_blk = offset / blocksize; | |
5388 | ||
5389 | /* We don't allow ocfs2_xattr_value to be stored in different block. */ | |
5390 | BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); | |
01225596 | 5391 | |
b3e5d379 JB |
5392 | vb.vb_bh = bucket->bu_bhs[value_blk]; |
5393 | BUG_ON(!vb.vb_bh); | |
01225596 | 5394 | |
b3e5d379 JB |
5395 | vb.vb_xv = (struct ocfs2_xattr_value_root *) |
5396 | (vb.vb_bh->b_data + offset % blocksize); | |
01225596 | 5397 | |
548b0f22 JB |
5398 | /* |
5399 | * From here on out we have to dirty the bucket. The generic | |
5400 | * value calls only modify one of the bucket's bhs, but we need | |
5401 | * to send the bucket at once. So if they error, they *could* have | |
5402 | * modified something. We have to assume they did, and dirty | |
5403 | * the whole bucket. This leaves us in a consistent state. | |
5404 | */ | |
402b4183 TM |
5405 | trace_ocfs2_xattr_bucket_value_truncate( |
5406 | (unsigned long long)bucket_blkno(bucket), xe_off, len); | |
b3e5d379 | 5407 | ret = ocfs2_xattr_value_truncate(inode, &vb, len, ctxt); |
01225596 TM |
5408 | if (ret) { |
5409 | mlog_errno(ret); | |
554e7f9e TM |
5410 | goto out; |
5411 | } | |
5412 | ||
5413 | ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, | |
5414 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5415 | if (ret) { | |
5416 | mlog_errno(ret); | |
5417 | goto out; | |
01225596 TM |
5418 | } |
5419 | ||
548b0f22 JB |
5420 | xe->xe_value_size = cpu_to_le64(len); |
5421 | ||
548b0f22 JB |
5422 | ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); |
5423 | ||
01225596 | 5424 | out: |
01225596 TM |
5425 | return ret; |
5426 | } | |
5427 | ||
01225596 TM |
5428 | static int ocfs2_rm_xattr_cluster(struct inode *inode, |
5429 | struct buffer_head *root_bh, | |
5430 | u64 blkno, | |
5431 | u32 cpos, | |
47bca495 TM |
5432 | u32 len, |
5433 | void *para) | |
01225596 TM |
5434 | { |
5435 | int ret; | |
5436 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5437 | struct inode *tl_inode = osb->osb_tl_inode; | |
5438 | handle_t *handle; | |
5439 | struct ocfs2_xattr_block *xb = | |
5440 | (struct ocfs2_xattr_block *)root_bh->b_data; | |
01225596 TM |
5441 | struct ocfs2_alloc_context *meta_ac = NULL; |
5442 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
f99b9b7c JB |
5443 | struct ocfs2_extent_tree et; |
5444 | ||
47bca495 | 5445 | ret = ocfs2_iterate_xattr_buckets(inode, blkno, len, |
ce9c5a54 | 5446 | ocfs2_delete_xattr_in_bucket, para); |
47bca495 TM |
5447 | if (ret) { |
5448 | mlog_errno(ret); | |
5449 | return ret; | |
5450 | } | |
5451 | ||
5e404e9e | 5452 | ocfs2_init_xattr_tree_extent_tree(&et, INODE_CACHE(inode), root_bh); |
01225596 TM |
5453 | |
5454 | ocfs2_init_dealloc_ctxt(&dealloc); | |
5455 | ||
402b4183 TM |
5456 | trace_ocfs2_rm_xattr_cluster( |
5457 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
5458 | (unsigned long long)blkno, cpos, len); | |
01225596 | 5459 | |
8cb471e8 JB |
5460 | ocfs2_remove_xattr_clusters_from_cache(INODE_CACHE(inode), blkno, |
5461 | len); | |
01225596 | 5462 | |
f99b9b7c | 5463 | ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); |
01225596 TM |
5464 | if (ret) { |
5465 | mlog_errno(ret); | |
5466 | return ret; | |
5467 | } | |
5468 | ||
5955102c | 5469 | inode_lock(tl_inode); |
01225596 TM |
5470 | |
5471 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
5472 | ret = __ocfs2_flush_truncate_log(osb); | |
5473 | if (ret < 0) { | |
5474 | mlog_errno(ret); | |
5475 | goto out; | |
5476 | } | |
5477 | } | |
5478 | ||
a90714c1 | 5479 | handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); |
d3264799 | 5480 | if (IS_ERR(handle)) { |
01225596 TM |
5481 | ret = -ENOMEM; |
5482 | mlog_errno(ret); | |
5483 | goto out; | |
5484 | } | |
5485 | ||
0cf2f763 | 5486 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode), root_bh, |
84008972 | 5487 | OCFS2_JOURNAL_ACCESS_WRITE); |
01225596 TM |
5488 | if (ret) { |
5489 | mlog_errno(ret); | |
5490 | goto out_commit; | |
5491 | } | |
5492 | ||
dbdcf6a4 | 5493 | ret = ocfs2_remove_extent(handle, &et, cpos, len, meta_ac, |
f99b9b7c | 5494 | &dealloc); |
01225596 TM |
5495 | if (ret) { |
5496 | mlog_errno(ret); | |
5497 | goto out_commit; | |
5498 | } | |
5499 | ||
5500 | le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); | |
ec20cec7 | 5501 | ocfs2_journal_dirty(handle, root_bh); |
01225596 TM |
5502 | |
5503 | ret = ocfs2_truncate_log_append(osb, handle, blkno, len); | |
5504 | if (ret) | |
5505 | mlog_errno(ret); | |
6fdb702d | 5506 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
01225596 TM |
5507 | |
5508 | out_commit: | |
5509 | ocfs2_commit_trans(osb, handle); | |
5510 | out: | |
5511 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
5512 | ||
5955102c | 5513 | inode_unlock(tl_inode); |
01225596 TM |
5514 | |
5515 | if (meta_ac) | |
5516 | ocfs2_free_alloc_context(meta_ac); | |
5517 | ||
5518 | ocfs2_run_deallocs(osb, &dealloc); | |
5519 | ||
5520 | return ret; | |
5521 | } | |
5522 | ||
80bcaf34 TM |
5523 | /* |
5524 | * check whether the xattr bucket is filled up with the same hash value. | |
5525 | * If we want to insert the xattr with the same hash, return -ENOSPC. | |
5526 | * If we want to insert a xattr with different hash value, go ahead | |
5527 | * and ocfs2_divide_xattr_bucket will handle this. | |
5528 | */ | |
01225596 | 5529 | static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
80bcaf34 TM |
5530 | struct ocfs2_xattr_bucket *bucket, |
5531 | const char *name) | |
01225596 | 5532 | { |
3e632946 | 5533 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
80bcaf34 TM |
5534 | u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); |
5535 | ||
5536 | if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) | |
5537 | return 0; | |
01225596 TM |
5538 | |
5539 | if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == | |
5540 | xh->xh_entries[0].xe_name_hash) { | |
5541 | mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " | |
5542 | "hash = %u\n", | |
9c7759aa | 5543 | (unsigned long long)bucket_blkno(bucket), |
01225596 TM |
5544 | le32_to_cpu(xh->xh_entries[0].xe_name_hash)); |
5545 | return -ENOSPC; | |
5546 | } | |
5547 | ||
5548 | return 0; | |
5549 | } | |
5550 | ||
c5d95df5 JB |
5551 | /* |
5552 | * Try to set the entry in the current bucket. If we fail, the caller | |
5553 | * will handle getting us another bucket. | |
5554 | */ | |
5555 | static int ocfs2_xattr_set_entry_bucket(struct inode *inode, | |
5556 | struct ocfs2_xattr_info *xi, | |
5557 | struct ocfs2_xattr_search *xs, | |
5558 | struct ocfs2_xattr_set_ctxt *ctxt) | |
01225596 | 5559 | { |
c5d95df5 JB |
5560 | int ret; |
5561 | struct ocfs2_xa_loc loc; | |
01225596 | 5562 | |
402b4183 | 5563 | trace_ocfs2_xattr_set_entry_bucket(xi->xi_name); |
01225596 | 5564 | |
c5d95df5 JB |
5565 | ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket, |
5566 | xs->not_found ? NULL : xs->here); | |
5567 | ret = ocfs2_xa_set(&loc, xi, ctxt); | |
5568 | if (!ret) { | |
5569 | xs->here = loc.xl_entry; | |
5570 | goto out; | |
5571 | } | |
5572 | if (ret != -ENOSPC) { | |
5573 | mlog_errno(ret); | |
5574 | goto out; | |
5575 | } | |
01225596 | 5576 | |
c5d95df5 JB |
5577 | /* Ok, we need space. Let's try defragmenting the bucket. */ |
5578 | ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, | |
5579 | xs->bucket); | |
5580 | if (ret) { | |
5581 | mlog_errno(ret); | |
5582 | goto out; | |
5583 | } | |
01225596 | 5584 | |
c5d95df5 JB |
5585 | ret = ocfs2_xa_set(&loc, xi, ctxt); |
5586 | if (!ret) { | |
5587 | xs->here = loc.xl_entry; | |
5588 | goto out; | |
01225596 | 5589 | } |
c5d95df5 JB |
5590 | if (ret != -ENOSPC) |
5591 | mlog_errno(ret); | |
01225596 | 5592 | |
01225596 | 5593 | |
c5d95df5 | 5594 | out: |
c5d95df5 JB |
5595 | return ret; |
5596 | } | |
01225596 | 5597 | |
c5d95df5 JB |
5598 | static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
5599 | struct ocfs2_xattr_info *xi, | |
5600 | struct ocfs2_xattr_search *xs, | |
5601 | struct ocfs2_xattr_set_ctxt *ctxt) | |
5602 | { | |
5603 | int ret; | |
01225596 | 5604 | |
402b4183 | 5605 | trace_ocfs2_xattr_set_entry_index_block(xi->xi_name); |
01225596 | 5606 | |
c5d95df5 JB |
5607 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); |
5608 | if (!ret) | |
5609 | goto out; | |
5610 | if (ret != -ENOSPC) { | |
5611 | mlog_errno(ret); | |
5612 | goto out; | |
5613 | } | |
01225596 | 5614 | |
c5d95df5 | 5615 | /* Ack, need more space. Let's try to get another bucket! */ |
01225596 | 5616 | |
c5d95df5 JB |
5617 | /* |
5618 | * We do not allow for overlapping ranges between buckets. And | |
5619 | * the maximum number of collisions we will allow for then is | |
5620 | * one bucket's worth, so check it here whether we need to | |
5621 | * add a new bucket for the insert. | |
5622 | */ | |
5623 | ret = ocfs2_check_xattr_bucket_collision(inode, | |
91f2033f | 5624 | xs->bucket, |
c5d95df5 JB |
5625 | xi->xi_name); |
5626 | if (ret) { | |
5627 | mlog_errno(ret); | |
5628 | goto out; | |
5629 | } | |
01225596 | 5630 | |
c5d95df5 JB |
5631 | ret = ocfs2_add_new_xattr_bucket(inode, |
5632 | xs->xattr_bh, | |
5633 | xs->bucket, | |
5634 | ctxt); | |
5635 | if (ret) { | |
5636 | mlog_errno(ret); | |
5637 | goto out; | |
01225596 TM |
5638 | } |
5639 | ||
c5d95df5 JB |
5640 | /* |
5641 | * ocfs2_add_new_xattr_bucket() will have updated | |
5642 | * xs->bucket if it moved, but it will not have updated | |
5643 | * any of the other search fields. Thus, we drop it and | |
5644 | * re-search. Everything should be cached, so it'll be | |
5645 | * quick. | |
5646 | */ | |
5647 | ocfs2_xattr_bucket_relse(xs->bucket); | |
5648 | ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, | |
5649 | xi->xi_name_index, | |
5650 | xi->xi_name, xs); | |
5651 | if (ret && ret != -ENODATA) | |
5652 | goto out; | |
5653 | xs->not_found = ret; | |
5654 | ||
5655 | /* Ok, we have a new bucket, let's try again */ | |
5656 | ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt); | |
5657 | if (ret && (ret != -ENOSPC)) | |
5658 | mlog_errno(ret); | |
5659 | ||
01225596 | 5660 | out: |
01225596 TM |
5661 | return ret; |
5662 | } | |
a3944256 TM |
5663 | |
5664 | static int ocfs2_delete_xattr_in_bucket(struct inode *inode, | |
5665 | struct ocfs2_xattr_bucket *bucket, | |
5666 | void *para) | |
5667 | { | |
ce9c5a54 | 5668 | int ret = 0, ref_credits; |
3e632946 | 5669 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); |
a3944256 TM |
5670 | u16 i; |
5671 | struct ocfs2_xattr_entry *xe; | |
78f30c31 TM |
5672 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
5673 | struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; | |
548b0f22 JB |
5674 | int credits = ocfs2_remove_extent_credits(osb->sb) + |
5675 | ocfs2_blocks_per_xattr_bucket(inode->i_sb); | |
ce9c5a54 TM |
5676 | struct ocfs2_xattr_value_root *xv; |
5677 | struct ocfs2_rm_xattr_bucket_para *args = | |
5678 | (struct ocfs2_rm_xattr_bucket_para *)para; | |
78f30c31 TM |
5679 | |
5680 | ocfs2_init_dealloc_ctxt(&ctxt.dealloc); | |
a3944256 TM |
5681 | |
5682 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
5683 | xe = &xh->xh_entries[i]; | |
5684 | if (ocfs2_xattr_is_local(xe)) | |
5685 | continue; | |
5686 | ||
ce9c5a54 TM |
5687 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, |
5688 | i, &xv, NULL); | |
023d4ea3 JQ |
5689 | if (ret) { |
5690 | mlog_errno(ret); | |
5691 | break; | |
5692 | } | |
ce9c5a54 TM |
5693 | |
5694 | ret = ocfs2_lock_xattr_remove_allocators(inode, xv, | |
5695 | args->ref_ci, | |
5696 | args->ref_root_bh, | |
5697 | &ctxt.meta_ac, | |
5698 | &ref_credits); | |
5699 | ||
5700 | ctxt.handle = ocfs2_start_trans(osb, credits + ref_credits); | |
88c3b062 TM |
5701 | if (IS_ERR(ctxt.handle)) { |
5702 | ret = PTR_ERR(ctxt.handle); | |
5703 | mlog_errno(ret); | |
5704 | break; | |
5705 | } | |
5706 | ||
548b0f22 | 5707 | ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, |
78f30c31 | 5708 | i, 0, &ctxt); |
88c3b062 TM |
5709 | |
5710 | ocfs2_commit_trans(osb, ctxt.handle); | |
ce9c5a54 TM |
5711 | if (ctxt.meta_ac) { |
5712 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
5713 | ctxt.meta_ac = NULL; | |
5714 | } | |
a3944256 TM |
5715 | if (ret) { |
5716 | mlog_errno(ret); | |
5717 | break; | |
5718 | } | |
5719 | } | |
5720 | ||
ce9c5a54 TM |
5721 | if (ctxt.meta_ac) |
5722 | ocfs2_free_alloc_context(ctxt.meta_ac); | |
78f30c31 TM |
5723 | ocfs2_schedule_truncate_log_flush(osb, 1); |
5724 | ocfs2_run_deallocs(osb, &ctxt.dealloc); | |
a3944256 TM |
5725 | return ret; |
5726 | } | |
5727 | ||
492a8a33 TM |
5728 | /* |
5729 | * Whenever we modify a xattr value root in the bucket(e.g, CoW | |
5730 | * or change the extent record flag), we need to recalculate | |
5731 | * the metaecc for the whole bucket. So it is done here. | |
5732 | * | |
5733 | * Note: | |
5734 | * We have to give the extra credits for the caller. | |
5735 | */ | |
5736 | static int ocfs2_xattr_bucket_post_refcount(struct inode *inode, | |
5737 | handle_t *handle, | |
5738 | void *para) | |
5739 | { | |
5740 | int ret; | |
5741 | struct ocfs2_xattr_bucket *bucket = | |
5742 | (struct ocfs2_xattr_bucket *)para; | |
5743 | ||
5744 | ret = ocfs2_xattr_bucket_journal_access(handle, bucket, | |
5745 | OCFS2_JOURNAL_ACCESS_WRITE); | |
5746 | if (ret) { | |
5747 | mlog_errno(ret); | |
5748 | return ret; | |
5749 | } | |
5750 | ||
5751 | ocfs2_xattr_bucket_journal_dirty(handle, bucket); | |
5752 | ||
5753 | return 0; | |
5754 | } | |
5755 | ||
5756 | /* | |
5757 | * Special action we need if the xattr value is refcounted. | |
5758 | * | |
5759 | * 1. If the xattr is refcounted, lock the tree. | |
5760 | * 2. CoW the xattr if we are setting the new value and the value | |
5761 | * will be stored outside. | |
5762 | * 3. In other case, decrease_refcount will work for us, so just | |
5763 | * lock the refcount tree, calculate the meta and credits is OK. | |
5764 | * | |
5765 | * We have to do CoW before ocfs2_init_xattr_set_ctxt since | |
5766 | * currently CoW is a completed transaction, while this function | |
5767 | * will also lock the allocators and let us deadlock. So we will | |
5768 | * CoW the whole xattr value. | |
5769 | */ | |
5770 | static int ocfs2_prepare_refcount_xattr(struct inode *inode, | |
5771 | struct ocfs2_dinode *di, | |
5772 | struct ocfs2_xattr_info *xi, | |
5773 | struct ocfs2_xattr_search *xis, | |
5774 | struct ocfs2_xattr_search *xbs, | |
5775 | struct ocfs2_refcount_tree **ref_tree, | |
5776 | int *meta_add, | |
5777 | int *credits) | |
5778 | { | |
5779 | int ret = 0; | |
5780 | struct ocfs2_xattr_block *xb; | |
5781 | struct ocfs2_xattr_entry *xe; | |
5782 | char *base; | |
5783 | u32 p_cluster, num_clusters; | |
5784 | unsigned int ext_flags; | |
5785 | int name_offset, name_len; | |
5786 | struct ocfs2_xattr_value_buf vb; | |
5787 | struct ocfs2_xattr_bucket *bucket = NULL; | |
5788 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
5789 | struct ocfs2_post_refcount refcount; | |
5790 | struct ocfs2_post_refcount *p = NULL; | |
5791 | struct buffer_head *ref_root_bh = NULL; | |
5792 | ||
5793 | if (!xis->not_found) { | |
5794 | xe = xis->here; | |
5795 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5796 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5797 | base = xis->base; | |
5798 | vb.vb_bh = xis->inode_bh; | |
5799 | vb.vb_access = ocfs2_journal_access_di; | |
5800 | } else { | |
5801 | int i, block_off = 0; | |
5802 | xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; | |
5803 | xe = xbs->here; | |
5804 | name_offset = le16_to_cpu(xe->xe_name_offset); | |
5805 | name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); | |
5806 | i = xbs->here - xbs->header->xh_entries; | |
5807 | ||
5808 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { | |
fd68a894 | 5809 | ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb, |
492a8a33 TM |
5810 | bucket_xh(xbs->bucket), |
5811 | i, &block_off, | |
5812 | &name_offset); | |
5813 | if (ret) { | |
5814 | mlog_errno(ret); | |
5815 | goto out; | |
5816 | } | |
5817 | base = bucket_block(xbs->bucket, block_off); | |
5818 | vb.vb_bh = xbs->bucket->bu_bhs[block_off]; | |
5819 | vb.vb_access = ocfs2_journal_access; | |
5820 | ||
5821 | if (ocfs2_meta_ecc(osb)) { | |
5822 | /*create parameters for ocfs2_post_refcount. */ | |
5823 | bucket = xbs->bucket; | |
5824 | refcount.credits = bucket->bu_blocks; | |
5825 | refcount.para = bucket; | |
5826 | refcount.func = | |
5827 | ocfs2_xattr_bucket_post_refcount; | |
5828 | p = &refcount; | |
5829 | } | |
5830 | } else { | |
5831 | base = xbs->base; | |
5832 | vb.vb_bh = xbs->xattr_bh; | |
5833 | vb.vb_access = ocfs2_journal_access_xb; | |
5834 | } | |
5835 | } | |
5836 | ||
5837 | if (ocfs2_xattr_is_local(xe)) | |
5838 | goto out; | |
5839 | ||
5840 | vb.vb_xv = (struct ocfs2_xattr_value_root *) | |
5841 | (base + name_offset + name_len); | |
5842 | ||
5843 | ret = ocfs2_xattr_get_clusters(inode, 0, &p_cluster, | |
5844 | &num_clusters, &vb.vb_xv->xr_list, | |
5845 | &ext_flags); | |
5846 | if (ret) { | |
5847 | mlog_errno(ret); | |
5848 | goto out; | |
5849 | } | |
5850 | ||
5851 | /* | |
5852 | * We just need to check the 1st extent record, since we always | |
5853 | * CoW the whole xattr. So there shouldn't be a xattr with | |
5854 | * some REFCOUNT extent recs after the 1st one. | |
5855 | */ | |
5856 | if (!(ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5857 | goto out; | |
5858 | ||
5859 | ret = ocfs2_lock_refcount_tree(osb, le64_to_cpu(di->i_refcount_loc), | |
5860 | 1, ref_tree, &ref_root_bh); | |
5861 | if (ret) { | |
5862 | mlog_errno(ret); | |
5863 | goto out; | |
5864 | } | |
5865 | ||
5866 | /* | |
5867 | * If we are deleting the xattr or the new size will be stored inside, | |
5868 | * cool, leave it there, the xattr truncate process will remove them | |
5869 | * for us(it still needs the refcount tree lock and the meta, credits). | |
5870 | * And the worse case is that every cluster truncate will split the | |
5871 | * refcount tree, and make the original extent become 3. So we will need | |
5872 | * 2 * cluster more extent recs at most. | |
5873 | */ | |
6b240ff6 | 5874 | if (!xi->xi_value || xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE) { |
492a8a33 TM |
5875 | |
5876 | ret = ocfs2_refcounted_xattr_delete_need(inode, | |
5877 | &(*ref_tree)->rf_ci, | |
5878 | ref_root_bh, vb.vb_xv, | |
5879 | meta_add, credits); | |
5880 | if (ret) | |
5881 | mlog_errno(ret); | |
5882 | goto out; | |
5883 | } | |
5884 | ||
5885 | ret = ocfs2_refcount_cow_xattr(inode, di, &vb, | |
5886 | *ref_tree, ref_root_bh, 0, | |
5887 | le32_to_cpu(vb.vb_xv->xr_clusters), p); | |
5888 | if (ret) | |
5889 | mlog_errno(ret); | |
5890 | ||
5891 | out: | |
5892 | brelse(ref_root_bh); | |
5893 | return ret; | |
5894 | } | |
5895 | ||
0129241e TM |
5896 | /* |
5897 | * Add the REFCOUNTED flags for all the extent rec in ocfs2_xattr_value_root. | |
5898 | * The physical clusters will be added to refcount tree. | |
5899 | */ | |
5900 | static int ocfs2_xattr_value_attach_refcount(struct inode *inode, | |
5901 | struct ocfs2_xattr_value_root *xv, | |
5902 | struct ocfs2_extent_tree *value_et, | |
5903 | struct ocfs2_caching_info *ref_ci, | |
5904 | struct buffer_head *ref_root_bh, | |
5905 | struct ocfs2_cached_dealloc_ctxt *dealloc, | |
5906 | struct ocfs2_post_refcount *refcount) | |
5907 | { | |
5908 | int ret = 0; | |
5909 | u32 clusters = le32_to_cpu(xv->xr_clusters); | |
5910 | u32 cpos, p_cluster, num_clusters; | |
5911 | struct ocfs2_extent_list *el = &xv->xr_list; | |
5912 | unsigned int ext_flags; | |
5913 | ||
5914 | cpos = 0; | |
5915 | while (cpos < clusters) { | |
5916 | ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
5917 | &num_clusters, el, &ext_flags); | |
17caf955 JQ |
5918 | if (ret) { |
5919 | mlog_errno(ret); | |
5920 | break; | |
5921 | } | |
0129241e TM |
5922 | |
5923 | cpos += num_clusters; | |
5924 | if ((ext_flags & OCFS2_EXT_REFCOUNTED)) | |
5925 | continue; | |
5926 | ||
5927 | BUG_ON(!p_cluster); | |
5928 | ||
5929 | ret = ocfs2_add_refcount_flag(inode, value_et, | |
5930 | ref_ci, ref_root_bh, | |
5931 | cpos - num_clusters, | |
5932 | p_cluster, num_clusters, | |
5933 | dealloc, refcount); | |
5934 | if (ret) { | |
5935 | mlog_errno(ret); | |
5936 | break; | |
5937 | } | |
5938 | } | |
5939 | ||
5940 | return ret; | |
5941 | } | |
5942 | ||
5943 | /* | |
5944 | * Given a normal ocfs2_xattr_header, refcount all the entries which | |
5945 | * have value stored outside. | |
5946 | * Used for xattrs stored in inode and ocfs2_xattr_block. | |
5947 | */ | |
5948 | static int ocfs2_xattr_attach_refcount_normal(struct inode *inode, | |
5949 | struct ocfs2_xattr_value_buf *vb, | |
5950 | struct ocfs2_xattr_header *header, | |
5951 | struct ocfs2_caching_info *ref_ci, | |
5952 | struct buffer_head *ref_root_bh, | |
5953 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5954 | { | |
5955 | ||
5956 | struct ocfs2_xattr_entry *xe; | |
5957 | struct ocfs2_xattr_value_root *xv; | |
5958 | struct ocfs2_extent_tree et; | |
5959 | int i, ret = 0; | |
5960 | ||
5961 | for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
5962 | xe = &header->xh_entries[i]; | |
5963 | ||
5964 | if (ocfs2_xattr_is_local(xe)) | |
5965 | continue; | |
5966 | ||
5967 | xv = (struct ocfs2_xattr_value_root *)((void *)header + | |
5968 | le16_to_cpu(xe->xe_name_offset) + | |
5969 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
5970 | ||
5971 | vb->vb_xv = xv; | |
5972 | ocfs2_init_xattr_value_extent_tree(&et, INODE_CACHE(inode), vb); | |
5973 | ||
5974 | ret = ocfs2_xattr_value_attach_refcount(inode, xv, &et, | |
5975 | ref_ci, ref_root_bh, | |
5976 | dealloc, NULL); | |
5977 | if (ret) { | |
5978 | mlog_errno(ret); | |
5979 | break; | |
5980 | } | |
5981 | } | |
5982 | ||
5983 | return ret; | |
5984 | } | |
5985 | ||
5986 | static int ocfs2_xattr_inline_attach_refcount(struct inode *inode, | |
5987 | struct buffer_head *fe_bh, | |
5988 | struct ocfs2_caching_info *ref_ci, | |
5989 | struct buffer_head *ref_root_bh, | |
5990 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
5991 | { | |
5992 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
5993 | struct ocfs2_xattr_header *header = (struct ocfs2_xattr_header *) | |
5994 | (fe_bh->b_data + inode->i_sb->s_blocksize - | |
5995 | le16_to_cpu(di->i_xattr_inline_size)); | |
5996 | struct ocfs2_xattr_value_buf vb = { | |
5997 | .vb_bh = fe_bh, | |
5998 | .vb_access = ocfs2_journal_access_di, | |
5999 | }; | |
6000 | ||
6001 | return ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6002 | ref_ci, ref_root_bh, dealloc); | |
6003 | } | |
6004 | ||
6005 | struct ocfs2_xattr_tree_value_refcount_para { | |
6006 | struct ocfs2_caching_info *ref_ci; | |
6007 | struct buffer_head *ref_root_bh; | |
6008 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
6009 | }; | |
6010 | ||
6011 | static int ocfs2_get_xattr_tree_value_root(struct super_block *sb, | |
6012 | struct ocfs2_xattr_bucket *bucket, | |
6013 | int offset, | |
6014 | struct ocfs2_xattr_value_root **xv, | |
6015 | struct buffer_head **bh) | |
6016 | { | |
6017 | int ret, block_off, name_offset; | |
6018 | struct ocfs2_xattr_header *xh = bucket_xh(bucket); | |
6019 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6020 | void *base; | |
6021 | ||
6022 | ret = ocfs2_xattr_bucket_get_name_value(sb, | |
6023 | bucket_xh(bucket), | |
6024 | offset, | |
6025 | &block_off, | |
6026 | &name_offset); | |
6027 | if (ret) { | |
6028 | mlog_errno(ret); | |
6029 | goto out; | |
6030 | } | |
6031 | ||
6032 | base = bucket_block(bucket, block_off); | |
6033 | ||
6034 | *xv = (struct ocfs2_xattr_value_root *)(base + name_offset + | |
6035 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6036 | ||
6037 | if (bh) | |
6038 | *bh = bucket->bu_bhs[block_off]; | |
6039 | out: | |
6040 | return ret; | |
6041 | } | |
6042 | ||
6043 | /* | |
6044 | * For a given xattr bucket, refcount all the entries which | |
6045 | * have value stored outside. | |
6046 | */ | |
6047 | static int ocfs2_xattr_bucket_value_refcount(struct inode *inode, | |
6048 | struct ocfs2_xattr_bucket *bucket, | |
6049 | void *para) | |
6050 | { | |
6051 | int i, ret = 0; | |
6052 | struct ocfs2_extent_tree et; | |
6053 | struct ocfs2_xattr_tree_value_refcount_para *ref = | |
6054 | (struct ocfs2_xattr_tree_value_refcount_para *)para; | |
6055 | struct ocfs2_xattr_header *xh = | |
6056 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6057 | struct ocfs2_xattr_entry *xe; | |
6058 | struct ocfs2_xattr_value_buf vb = { | |
6059 | .vb_access = ocfs2_journal_access, | |
6060 | }; | |
6061 | struct ocfs2_post_refcount refcount = { | |
6062 | .credits = bucket->bu_blocks, | |
6063 | .para = bucket, | |
6064 | .func = ocfs2_xattr_bucket_post_refcount, | |
6065 | }; | |
6066 | struct ocfs2_post_refcount *p = NULL; | |
6067 | ||
6068 | /* We only need post_refcount if we support metaecc. */ | |
6069 | if (ocfs2_meta_ecc(OCFS2_SB(inode->i_sb))) | |
6070 | p = &refcount; | |
6071 | ||
402b4183 TM |
6072 | trace_ocfs2_xattr_bucket_value_refcount( |
6073 | (unsigned long long)bucket_blkno(bucket), | |
6074 | le16_to_cpu(xh->xh_count)); | |
0129241e TM |
6075 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
6076 | xe = &xh->xh_entries[i]; | |
6077 | ||
6078 | if (ocfs2_xattr_is_local(xe)) | |
6079 | continue; | |
6080 | ||
6081 | ret = ocfs2_get_xattr_tree_value_root(inode->i_sb, bucket, i, | |
6082 | &vb.vb_xv, &vb.vb_bh); | |
6083 | if (ret) { | |
6084 | mlog_errno(ret); | |
6085 | break; | |
6086 | } | |
6087 | ||
6088 | ocfs2_init_xattr_value_extent_tree(&et, | |
6089 | INODE_CACHE(inode), &vb); | |
6090 | ||
6091 | ret = ocfs2_xattr_value_attach_refcount(inode, vb.vb_xv, | |
6092 | &et, ref->ref_ci, | |
6093 | ref->ref_root_bh, | |
6094 | ref->dealloc, p); | |
6095 | if (ret) { | |
6096 | mlog_errno(ret); | |
6097 | break; | |
6098 | } | |
6099 | } | |
6100 | ||
6101 | return ret; | |
6102 | ||
6103 | } | |
6104 | ||
6105 | static int ocfs2_refcount_xattr_tree_rec(struct inode *inode, | |
6106 | struct buffer_head *root_bh, | |
6107 | u64 blkno, u32 cpos, u32 len, void *para) | |
6108 | { | |
6109 | return ocfs2_iterate_xattr_buckets(inode, blkno, len, | |
6110 | ocfs2_xattr_bucket_value_refcount, | |
6111 | para); | |
6112 | } | |
6113 | ||
6114 | static int ocfs2_xattr_block_attach_refcount(struct inode *inode, | |
6115 | struct buffer_head *blk_bh, | |
6116 | struct ocfs2_caching_info *ref_ci, | |
6117 | struct buffer_head *ref_root_bh, | |
6118 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6119 | { | |
6120 | int ret = 0; | |
6121 | struct ocfs2_xattr_block *xb = | |
6122 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6123 | ||
6124 | if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { | |
6125 | struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; | |
6126 | struct ocfs2_xattr_value_buf vb = { | |
6127 | .vb_bh = blk_bh, | |
6128 | .vb_access = ocfs2_journal_access_xb, | |
6129 | }; | |
6130 | ||
6131 | ret = ocfs2_xattr_attach_refcount_normal(inode, &vb, header, | |
6132 | ref_ci, ref_root_bh, | |
6133 | dealloc); | |
6134 | } else { | |
6135 | struct ocfs2_xattr_tree_value_refcount_para para = { | |
6136 | .ref_ci = ref_ci, | |
6137 | .ref_root_bh = ref_root_bh, | |
6138 | .dealloc = dealloc, | |
6139 | }; | |
6140 | ||
6141 | ret = ocfs2_iterate_xattr_index_block(inode, blk_bh, | |
6142 | ocfs2_refcount_xattr_tree_rec, | |
6143 | ¶); | |
6144 | } | |
6145 | ||
6146 | return ret; | |
6147 | } | |
6148 | ||
6149 | int ocfs2_xattr_attach_refcount_tree(struct inode *inode, | |
6150 | struct buffer_head *fe_bh, | |
6151 | struct ocfs2_caching_info *ref_ci, | |
6152 | struct buffer_head *ref_root_bh, | |
6153 | struct ocfs2_cached_dealloc_ctxt *dealloc) | |
6154 | { | |
6155 | int ret = 0; | |
6156 | struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
6157 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)fe_bh->b_data; | |
6158 | struct buffer_head *blk_bh = NULL; | |
6159 | ||
6160 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
6161 | ret = ocfs2_xattr_inline_attach_refcount(inode, fe_bh, | |
6162 | ref_ci, ref_root_bh, | |
6163 | dealloc); | |
6164 | if (ret) { | |
6165 | mlog_errno(ret); | |
6166 | goto out; | |
6167 | } | |
6168 | } | |
6169 | ||
6170 | if (!di->i_xattr_loc) | |
6171 | goto out; | |
6172 | ||
6173 | ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), | |
6174 | &blk_bh); | |
6175 | if (ret < 0) { | |
6176 | mlog_errno(ret); | |
6177 | goto out; | |
6178 | } | |
6179 | ||
6180 | ret = ocfs2_xattr_block_attach_refcount(inode, blk_bh, ref_ci, | |
6181 | ref_root_bh, dealloc); | |
6182 | if (ret) | |
6183 | mlog_errno(ret); | |
6184 | ||
6185 | brelse(blk_bh); | |
6186 | out: | |
6187 | ||
6188 | return ret; | |
6189 | } | |
6190 | ||
0fe9b66c | 6191 | typedef int (should_xattr_reflinked)(struct ocfs2_xattr_entry *xe); |
2999d12f TM |
6192 | /* |
6193 | * Store the information we need in xattr reflink. | |
6194 | * old_bh and new_bh are inode bh for the old and new inode. | |
6195 | */ | |
6196 | struct ocfs2_xattr_reflink { | |
6197 | struct inode *old_inode; | |
6198 | struct inode *new_inode; | |
6199 | struct buffer_head *old_bh; | |
6200 | struct buffer_head *new_bh; | |
6201 | struct ocfs2_caching_info *ref_ci; | |
6202 | struct buffer_head *ref_root_bh; | |
6203 | struct ocfs2_cached_dealloc_ctxt *dealloc; | |
0fe9b66c | 6204 | should_xattr_reflinked *xattr_reflinked; |
2999d12f TM |
6205 | }; |
6206 | ||
6207 | /* | |
6208 | * Given a xattr header and xe offset, | |
6209 | * return the proper xv and the corresponding bh. | |
6210 | * xattr in inode, block and xattr tree have different implementaions. | |
6211 | */ | |
6212 | typedef int (get_xattr_value_root)(struct super_block *sb, | |
6213 | struct buffer_head *bh, | |
6214 | struct ocfs2_xattr_header *xh, | |
6215 | int offset, | |
6216 | struct ocfs2_xattr_value_root **xv, | |
6217 | struct buffer_head **ret_bh, | |
6218 | void *para); | |
6219 | ||
6220 | /* | |
6221 | * Calculate all the xattr value root metadata stored in this xattr header and | |
6222 | * credits we need if we create them from the scratch. | |
6223 | * We use get_xattr_value_root so that all types of xattr container can use it. | |
6224 | */ | |
6225 | static int ocfs2_value_metas_in_xattr_header(struct super_block *sb, | |
6226 | struct buffer_head *bh, | |
6227 | struct ocfs2_xattr_header *xh, | |
6228 | int *metas, int *credits, | |
6229 | int *num_recs, | |
6230 | get_xattr_value_root *func, | |
6231 | void *para) | |
6232 | { | |
6233 | int i, ret = 0; | |
6234 | struct ocfs2_xattr_value_root *xv; | |
6235 | struct ocfs2_xattr_entry *xe; | |
6236 | ||
6237 | for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { | |
6238 | xe = &xh->xh_entries[i]; | |
6239 | if (ocfs2_xattr_is_local(xe)) | |
6240 | continue; | |
6241 | ||
6242 | ret = func(sb, bh, xh, i, &xv, NULL, para); | |
6243 | if (ret) { | |
6244 | mlog_errno(ret); | |
6245 | break; | |
6246 | } | |
6247 | ||
6248 | *metas += le16_to_cpu(xv->xr_list.l_tree_depth) * | |
6249 | le16_to_cpu(xv->xr_list.l_next_free_rec); | |
6250 | ||
6251 | *credits += ocfs2_calc_extend_credits(sb, | |
06f9da6e | 6252 | &def_xv.xv.xr_list); |
2999d12f TM |
6253 | |
6254 | /* | |
6255 | * If the value is a tree with depth > 1, We don't go deep | |
6256 | * to the extent block, so just calculate a maximum record num. | |
6257 | */ | |
6258 | if (!xv->xr_list.l_tree_depth) | |
8ff6af88 | 6259 | *num_recs += le16_to_cpu(xv->xr_list.l_next_free_rec); |
2999d12f TM |
6260 | else |
6261 | *num_recs += ocfs2_clusters_for_bytes(sb, | |
6262 | XATTR_SIZE_MAX); | |
6263 | } | |
6264 | ||
6265 | return ret; | |
6266 | } | |
6267 | ||
6268 | /* Used by xattr inode and block to return the right xv and buffer_head. */ | |
6269 | static int ocfs2_get_xattr_value_root(struct super_block *sb, | |
6270 | struct buffer_head *bh, | |
6271 | struct ocfs2_xattr_header *xh, | |
6272 | int offset, | |
6273 | struct ocfs2_xattr_value_root **xv, | |
6274 | struct buffer_head **ret_bh, | |
6275 | void *para) | |
6276 | { | |
6277 | struct ocfs2_xattr_entry *xe = &xh->xh_entries[offset]; | |
6278 | ||
6279 | *xv = (struct ocfs2_xattr_value_root *)((void *)xh + | |
6280 | le16_to_cpu(xe->xe_name_offset) + | |
6281 | OCFS2_XATTR_SIZE(xe->xe_name_len)); | |
6282 | ||
6283 | if (ret_bh) | |
6284 | *ret_bh = bh; | |
6285 | ||
6286 | return 0; | |
6287 | } | |
6288 | ||
6289 | /* | |
6290 | * Lock the meta_ac and caculate how much credits we need for reflink xattrs. | |
6291 | * It is only used for inline xattr and xattr block. | |
6292 | */ | |
6293 | static int ocfs2_reflink_lock_xattr_allocators(struct ocfs2_super *osb, | |
6294 | struct ocfs2_xattr_header *xh, | |
6295 | struct buffer_head *ref_root_bh, | |
6296 | int *credits, | |
6297 | struct ocfs2_alloc_context **meta_ac) | |
6298 | { | |
6299 | int ret, meta_add = 0, num_recs = 0; | |
6300 | struct ocfs2_refcount_block *rb = | |
6301 | (struct ocfs2_refcount_block *)ref_root_bh->b_data; | |
6302 | ||
6303 | *credits = 0; | |
6304 | ||
6305 | ret = ocfs2_value_metas_in_xattr_header(osb->sb, NULL, xh, | |
6306 | &meta_add, credits, &num_recs, | |
6307 | ocfs2_get_xattr_value_root, | |
6308 | NULL); | |
6309 | if (ret) { | |
6310 | mlog_errno(ret); | |
6311 | goto out; | |
6312 | } | |
6313 | ||
6314 | /* | |
6315 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6316 | * an approximate number we need for refcount tree change. | |
6317 | * Sometimes we need to split the tree, and after split, half recs | |
6318 | * will be moved to the new block, and a new block can only provide | |
6319 | * half number of recs. So we multiple new blocks by 2. | |
6320 | */ | |
6321 | num_recs = num_recs / ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6322 | meta_add += num_recs; | |
6323 | *credits += num_recs + num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6324 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6325 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6326 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6327 | else | |
6328 | *credits += 1; | |
6329 | ||
6330 | ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, meta_ac); | |
6331 | if (ret) | |
6332 | mlog_errno(ret); | |
6333 | ||
6334 | out: | |
6335 | return ret; | |
6336 | } | |
6337 | ||
6338 | /* | |
6339 | * Given a xattr header, reflink all the xattrs in this container. | |
6340 | * It can be used for inode, block and bucket. | |
6341 | * | |
6342 | * NOTE: | |
6343 | * Before we call this function, the caller has memcpy the xattr in | |
6344 | * old_xh to the new_xh. | |
0fe9b66c TM |
6345 | * |
6346 | * If args.xattr_reflinked is set, call it to decide whether the xe should | |
6347 | * be reflinked or not. If not, remove it from the new xattr header. | |
2999d12f TM |
6348 | */ |
6349 | static int ocfs2_reflink_xattr_header(handle_t *handle, | |
6350 | struct ocfs2_xattr_reflink *args, | |
6351 | struct buffer_head *old_bh, | |
6352 | struct ocfs2_xattr_header *xh, | |
6353 | struct buffer_head *new_bh, | |
6354 | struct ocfs2_xattr_header *new_xh, | |
6355 | struct ocfs2_xattr_value_buf *vb, | |
6356 | struct ocfs2_alloc_context *meta_ac, | |
6357 | get_xattr_value_root *func, | |
6358 | void *para) | |
6359 | { | |
0fe9b66c | 6360 | int ret = 0, i, j; |
2999d12f TM |
6361 | struct super_block *sb = args->old_inode->i_sb; |
6362 | struct buffer_head *value_bh; | |
0fe9b66c | 6363 | struct ocfs2_xattr_entry *xe, *last; |
2999d12f TM |
6364 | struct ocfs2_xattr_value_root *xv, *new_xv; |
6365 | struct ocfs2_extent_tree data_et; | |
6366 | u32 clusters, cpos, p_cluster, num_clusters; | |
6367 | unsigned int ext_flags = 0; | |
6368 | ||
402b4183 TM |
6369 | trace_ocfs2_reflink_xattr_header((unsigned long long)old_bh->b_blocknr, |
6370 | le16_to_cpu(xh->xh_count)); | |
0fe9b66c TM |
6371 | |
6372 | last = &new_xh->xh_entries[le16_to_cpu(new_xh->xh_count)]; | |
6373 | for (i = 0, j = 0; i < le16_to_cpu(xh->xh_count); i++, j++) { | |
2999d12f TM |
6374 | xe = &xh->xh_entries[i]; |
6375 | ||
0fe9b66c TM |
6376 | if (args->xattr_reflinked && !args->xattr_reflinked(xe)) { |
6377 | xe = &new_xh->xh_entries[j]; | |
6378 | ||
6379 | le16_add_cpu(&new_xh->xh_count, -1); | |
6380 | if (new_xh->xh_count) { | |
6381 | memmove(xe, xe + 1, | |
6382 | (void *)last - (void *)xe); | |
6383 | memset(last, 0, | |
6384 | sizeof(struct ocfs2_xattr_entry)); | |
6385 | } | |
6386 | ||
6387 | /* | |
6388 | * We don't want j to increase in the next round since | |
6389 | * it is already moved ahead. | |
6390 | */ | |
6391 | j--; | |
6392 | continue; | |
6393 | } | |
6394 | ||
2999d12f TM |
6395 | if (ocfs2_xattr_is_local(xe)) |
6396 | continue; | |
6397 | ||
6398 | ret = func(sb, old_bh, xh, i, &xv, NULL, para); | |
6399 | if (ret) { | |
6400 | mlog_errno(ret); | |
6401 | break; | |
6402 | } | |
6403 | ||
0fe9b66c | 6404 | ret = func(sb, new_bh, new_xh, j, &new_xv, &value_bh, para); |
2999d12f TM |
6405 | if (ret) { |
6406 | mlog_errno(ret); | |
6407 | break; | |
6408 | } | |
6409 | ||
6410 | /* | |
6411 | * For the xattr which has l_tree_depth = 0, all the extent | |
6412 | * recs have already be copied to the new xh with the | |
6413 | * propriate OCFS2_EXT_REFCOUNTED flag we just need to | |
6414 | * increase the refount count int the refcount tree. | |
6415 | * | |
6416 | * For the xattr which has l_tree_depth > 0, we need | |
6417 | * to initialize it to the empty default value root, | |
6418 | * and then insert the extents one by one. | |
6419 | */ | |
6420 | if (xv->xr_list.l_tree_depth) { | |
32ed0bd7 | 6421 | memcpy(new_xv, &def_xv, OCFS2_XATTR_ROOT_SIZE); |
2999d12f TM |
6422 | vb->vb_xv = new_xv; |
6423 | vb->vb_bh = value_bh; | |
6424 | ocfs2_init_xattr_value_extent_tree(&data_et, | |
6425 | INODE_CACHE(args->new_inode), vb); | |
6426 | } | |
6427 | ||
6428 | clusters = le32_to_cpu(xv->xr_clusters); | |
6429 | cpos = 0; | |
6430 | while (cpos < clusters) { | |
6431 | ret = ocfs2_xattr_get_clusters(args->old_inode, | |
6432 | cpos, | |
6433 | &p_cluster, | |
6434 | &num_clusters, | |
6435 | &xv->xr_list, | |
6436 | &ext_flags); | |
6437 | if (ret) { | |
6438 | mlog_errno(ret); | |
6439 | goto out; | |
6440 | } | |
6441 | ||
6442 | BUG_ON(!p_cluster); | |
6443 | ||
6444 | if (xv->xr_list.l_tree_depth) { | |
6445 | ret = ocfs2_insert_extent(handle, | |
6446 | &data_et, cpos, | |
6447 | ocfs2_clusters_to_blocks( | |
6448 | args->old_inode->i_sb, | |
6449 | p_cluster), | |
6450 | num_clusters, ext_flags, | |
6451 | meta_ac); | |
6452 | if (ret) { | |
6453 | mlog_errno(ret); | |
6454 | goto out; | |
6455 | } | |
6456 | } | |
6457 | ||
6458 | ret = ocfs2_increase_refcount(handle, args->ref_ci, | |
6459 | args->ref_root_bh, | |
6460 | p_cluster, num_clusters, | |
6461 | meta_ac, args->dealloc); | |
6462 | if (ret) { | |
6463 | mlog_errno(ret); | |
6464 | goto out; | |
6465 | } | |
6466 | ||
6467 | cpos += num_clusters; | |
6468 | } | |
6469 | } | |
6470 | ||
6471 | out: | |
6472 | return ret; | |
6473 | } | |
6474 | ||
6475 | static int ocfs2_reflink_xattr_inline(struct ocfs2_xattr_reflink *args) | |
6476 | { | |
6477 | int ret = 0, credits = 0; | |
6478 | handle_t *handle; | |
6479 | struct ocfs2_super *osb = OCFS2_SB(args->old_inode->i_sb); | |
6480 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)args->old_bh->b_data; | |
6481 | int inline_size = le16_to_cpu(di->i_xattr_inline_size); | |
6482 | int header_off = osb->sb->s_blocksize - inline_size; | |
6483 | struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *) | |
6484 | (args->old_bh->b_data + header_off); | |
6485 | struct ocfs2_xattr_header *new_xh = (struct ocfs2_xattr_header *) | |
6486 | (args->new_bh->b_data + header_off); | |
6487 | struct ocfs2_alloc_context *meta_ac = NULL; | |
6488 | struct ocfs2_inode_info *new_oi; | |
6489 | struct ocfs2_dinode *new_di; | |
6490 | struct ocfs2_xattr_value_buf vb = { | |
6491 | .vb_bh = args->new_bh, | |
6492 | .vb_access = ocfs2_journal_access_di, | |
6493 | }; | |
6494 | ||
6495 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6496 | &credits, &meta_ac); | |
6497 | if (ret) { | |
6498 | mlog_errno(ret); | |
6499 | goto out; | |
6500 | } | |
6501 | ||
6502 | handle = ocfs2_start_trans(osb, credits); | |
6503 | if (IS_ERR(handle)) { | |
6504 | ret = PTR_ERR(handle); | |
6505 | mlog_errno(ret); | |
6506 | goto out; | |
6507 | } | |
6508 | ||
6509 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(args->new_inode), | |
6510 | args->new_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6511 | if (ret) { | |
6512 | mlog_errno(ret); | |
6513 | goto out_commit; | |
6514 | } | |
6515 | ||
6516 | memcpy(args->new_bh->b_data + header_off, | |
6517 | args->old_bh->b_data + header_off, inline_size); | |
6518 | ||
6519 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6520 | new_di->i_xattr_inline_size = cpu_to_le16(inline_size); | |
6521 | ||
6522 | ret = ocfs2_reflink_xattr_header(handle, args, args->old_bh, xh, | |
6523 | args->new_bh, new_xh, &vb, meta_ac, | |
6524 | ocfs2_get_xattr_value_root, NULL); | |
6525 | if (ret) { | |
6526 | mlog_errno(ret); | |
6527 | goto out_commit; | |
6528 | } | |
6529 | ||
6530 | new_oi = OCFS2_I(args->new_inode); | |
ef962df0 JB |
6531 | /* |
6532 | * Adjust extent record count to reserve space for extended attribute. | |
6533 | * Inline data count had been adjusted in ocfs2_duplicate_inline_data(). | |
6534 | */ | |
6535 | if (!(new_oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) && | |
6536 | !(ocfs2_inode_is_fast_symlink(args->new_inode))) { | |
6537 | struct ocfs2_extent_list *el = &new_di->id2.i_list; | |
6538 | le16_add_cpu(&el->l_count, -(inline_size / | |
6539 | sizeof(struct ocfs2_extent_rec))); | |
6540 | } | |
2999d12f TM |
6541 | spin_lock(&new_oi->ip_lock); |
6542 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL | OCFS2_INLINE_XATTR_FL; | |
6543 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6544 | spin_unlock(&new_oi->ip_lock); | |
6545 | ||
6546 | ocfs2_journal_dirty(handle, args->new_bh); | |
6547 | ||
6548 | out_commit: | |
6549 | ocfs2_commit_trans(osb, handle); | |
6550 | ||
6551 | out: | |
6552 | if (meta_ac) | |
6553 | ocfs2_free_alloc_context(meta_ac); | |
6554 | return ret; | |
6555 | } | |
6556 | ||
6557 | static int ocfs2_create_empty_xattr_block(struct inode *inode, | |
6558 | struct buffer_head *fe_bh, | |
6559 | struct buffer_head **ret_bh, | |
6560 | int indexed) | |
6561 | { | |
6562 | int ret; | |
2999d12f | 6563 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
b2317968 | 6564 | struct ocfs2_xattr_set_ctxt ctxt; |
2999d12f | 6565 | |
b2317968 TM |
6566 | memset(&ctxt, 0, sizeof(ctxt)); |
6567 | ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &ctxt.meta_ac); | |
2999d12f TM |
6568 | if (ret < 0) { |
6569 | mlog_errno(ret); | |
6570 | return ret; | |
6571 | } | |
6572 | ||
d3981544 JB |
6573 | ctxt.handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_CREATE_CREDITS); |
6574 | if (IS_ERR(ctxt.handle)) { | |
6575 | ret = PTR_ERR(ctxt.handle); | |
2999d12f TM |
6576 | mlog_errno(ret); |
6577 | goto out; | |
6578 | } | |
6579 | ||
402b4183 TM |
6580 | trace_ocfs2_create_empty_xattr_block( |
6581 | (unsigned long long)fe_bh->b_blocknr, indexed); | |
d3981544 JB |
6582 | ret = ocfs2_create_xattr_block(inode, fe_bh, &ctxt, indexed, |
6583 | ret_bh); | |
2999d12f TM |
6584 | if (ret) |
6585 | mlog_errno(ret); | |
6586 | ||
d3981544 | 6587 | ocfs2_commit_trans(osb, ctxt.handle); |
2999d12f | 6588 | out: |
b2317968 | 6589 | ocfs2_free_alloc_context(ctxt.meta_ac); |
2999d12f TM |
6590 | return ret; |
6591 | } | |
6592 | ||
6593 | static int ocfs2_reflink_xattr_block(struct ocfs2_xattr_reflink *args, | |
6594 | struct buffer_head *blk_bh, | |
6595 | struct buffer_head *new_blk_bh) | |
6596 | { | |
6597 | int ret = 0, credits = 0; | |
6598 | handle_t *handle; | |
6599 | struct ocfs2_inode_info *new_oi = OCFS2_I(args->new_inode); | |
6600 | struct ocfs2_dinode *new_di; | |
6601 | struct ocfs2_super *osb = OCFS2_SB(args->new_inode->i_sb); | |
6602 | int header_off = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); | |
6603 | struct ocfs2_xattr_block *xb = | |
6604 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
6605 | struct ocfs2_xattr_header *xh = &xb->xb_attrs.xb_header; | |
6606 | struct ocfs2_xattr_block *new_xb = | |
6607 | (struct ocfs2_xattr_block *)new_blk_bh->b_data; | |
6608 | struct ocfs2_xattr_header *new_xh = &new_xb->xb_attrs.xb_header; | |
6609 | struct ocfs2_alloc_context *meta_ac; | |
6610 | struct ocfs2_xattr_value_buf vb = { | |
6611 | .vb_bh = new_blk_bh, | |
6612 | .vb_access = ocfs2_journal_access_xb, | |
6613 | }; | |
6614 | ||
6615 | ret = ocfs2_reflink_lock_xattr_allocators(osb, xh, args->ref_root_bh, | |
6616 | &credits, &meta_ac); | |
6617 | if (ret) { | |
6618 | mlog_errno(ret); | |
6619 | return ret; | |
6620 | } | |
6621 | ||
6622 | /* One more credits in case we need to add xattr flags in new inode. */ | |
6623 | handle = ocfs2_start_trans(osb, credits + 1); | |
6624 | if (IS_ERR(handle)) { | |
6625 | ret = PTR_ERR(handle); | |
6626 | mlog_errno(ret); | |
6627 | goto out; | |
6628 | } | |
6629 | ||
6630 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6631 | ret = ocfs2_journal_access_di(handle, | |
6632 | INODE_CACHE(args->new_inode), | |
6633 | args->new_bh, | |
6634 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6635 | if (ret) { | |
6636 | mlog_errno(ret); | |
6637 | goto out_commit; | |
6638 | } | |
6639 | } | |
6640 | ||
6641 | ret = ocfs2_journal_access_xb(handle, INODE_CACHE(args->new_inode), | |
6642 | new_blk_bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
6643 | if (ret) { | |
6644 | mlog_errno(ret); | |
6645 | goto out_commit; | |
6646 | } | |
6647 | ||
6648 | memcpy(new_blk_bh->b_data + header_off, blk_bh->b_data + header_off, | |
6649 | osb->sb->s_blocksize - header_off); | |
6650 | ||
6651 | ret = ocfs2_reflink_xattr_header(handle, args, blk_bh, xh, | |
6652 | new_blk_bh, new_xh, &vb, meta_ac, | |
6653 | ocfs2_get_xattr_value_root, NULL); | |
6654 | if (ret) { | |
6655 | mlog_errno(ret); | |
6656 | goto out_commit; | |
6657 | } | |
6658 | ||
6659 | ocfs2_journal_dirty(handle, new_blk_bh); | |
6660 | ||
6661 | if (!(new_oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) { | |
6662 | new_di = (struct ocfs2_dinode *)args->new_bh->b_data; | |
6663 | spin_lock(&new_oi->ip_lock); | |
6664 | new_oi->ip_dyn_features |= OCFS2_HAS_XATTR_FL; | |
6665 | new_di->i_dyn_features = cpu_to_le16(new_oi->ip_dyn_features); | |
6666 | spin_unlock(&new_oi->ip_lock); | |
6667 | ||
6668 | ocfs2_journal_dirty(handle, args->new_bh); | |
6669 | } | |
6670 | ||
6671 | out_commit: | |
6672 | ocfs2_commit_trans(osb, handle); | |
6673 | ||
6674 | out: | |
6675 | ocfs2_free_alloc_context(meta_ac); | |
6676 | return ret; | |
6677 | } | |
6678 | ||
6679 | struct ocfs2_reflink_xattr_tree_args { | |
6680 | struct ocfs2_xattr_reflink *reflink; | |
6681 | struct buffer_head *old_blk_bh; | |
6682 | struct buffer_head *new_blk_bh; | |
6683 | struct ocfs2_xattr_bucket *old_bucket; | |
6684 | struct ocfs2_xattr_bucket *new_bucket; | |
6685 | }; | |
6686 | ||
6687 | /* | |
6688 | * NOTE: | |
6689 | * We have to handle the case that both old bucket and new bucket | |
6690 | * will call this function to get the right ret_bh. | |
6691 | * So The caller must give us the right bh. | |
6692 | */ | |
6693 | static int ocfs2_get_reflink_xattr_value_root(struct super_block *sb, | |
6694 | struct buffer_head *bh, | |
6695 | struct ocfs2_xattr_header *xh, | |
6696 | int offset, | |
6697 | struct ocfs2_xattr_value_root **xv, | |
6698 | struct buffer_head **ret_bh, | |
6699 | void *para) | |
6700 | { | |
6701 | struct ocfs2_reflink_xattr_tree_args *args = | |
6702 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
6703 | struct ocfs2_xattr_bucket *bucket; | |
6704 | ||
6705 | if (bh == args->old_bucket->bu_bhs[0]) | |
6706 | bucket = args->old_bucket; | |
6707 | else | |
6708 | bucket = args->new_bucket; | |
6709 | ||
6710 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6711 | xv, ret_bh); | |
6712 | } | |
6713 | ||
6714 | struct ocfs2_value_tree_metas { | |
6715 | int num_metas; | |
6716 | int credits; | |
6717 | int num_recs; | |
6718 | }; | |
6719 | ||
6720 | static int ocfs2_value_tree_metas_in_bucket(struct super_block *sb, | |
6721 | struct buffer_head *bh, | |
6722 | struct ocfs2_xattr_header *xh, | |
6723 | int offset, | |
6724 | struct ocfs2_xattr_value_root **xv, | |
6725 | struct buffer_head **ret_bh, | |
6726 | void *para) | |
6727 | { | |
6728 | struct ocfs2_xattr_bucket *bucket = | |
6729 | (struct ocfs2_xattr_bucket *)para; | |
6730 | ||
6731 | return ocfs2_get_xattr_tree_value_root(sb, bucket, offset, | |
6732 | xv, ret_bh); | |
6733 | } | |
6734 | ||
6735 | static int ocfs2_calc_value_tree_metas(struct inode *inode, | |
6736 | struct ocfs2_xattr_bucket *bucket, | |
6737 | void *para) | |
6738 | { | |
6739 | struct ocfs2_value_tree_metas *metas = | |
6740 | (struct ocfs2_value_tree_metas *)para; | |
6741 | struct ocfs2_xattr_header *xh = | |
6742 | (struct ocfs2_xattr_header *)bucket->bu_bhs[0]->b_data; | |
6743 | ||
6744 | /* Add the credits for this bucket first. */ | |
6745 | metas->credits += bucket->bu_blocks; | |
6746 | return ocfs2_value_metas_in_xattr_header(inode->i_sb, bucket->bu_bhs[0], | |
6747 | xh, &metas->num_metas, | |
6748 | &metas->credits, &metas->num_recs, | |
6749 | ocfs2_value_tree_metas_in_bucket, | |
6750 | bucket); | |
6751 | } | |
6752 | ||
6753 | /* | |
6754 | * Given a xattr extent rec starting from blkno and having len clusters, | |
6755 | * iterate all the buckets calculate how much metadata we need for reflinking | |
6756 | * all the ocfs2_xattr_value_root and lock the allocators accordingly. | |
6757 | */ | |
6758 | static int ocfs2_lock_reflink_xattr_rec_allocators( | |
6759 | struct ocfs2_reflink_xattr_tree_args *args, | |
6760 | struct ocfs2_extent_tree *xt_et, | |
6761 | u64 blkno, u32 len, int *credits, | |
6762 | struct ocfs2_alloc_context **meta_ac, | |
6763 | struct ocfs2_alloc_context **data_ac) | |
6764 | { | |
6765 | int ret, num_free_extents; | |
6766 | struct ocfs2_value_tree_metas metas; | |
6767 | struct ocfs2_super *osb = OCFS2_SB(args->reflink->old_inode->i_sb); | |
6768 | struct ocfs2_refcount_block *rb; | |
6769 | ||
6770 | memset(&metas, 0, sizeof(metas)); | |
6771 | ||
6772 | ret = ocfs2_iterate_xattr_buckets(args->reflink->old_inode, blkno, len, | |
6773 | ocfs2_calc_value_tree_metas, &metas); | |
6774 | if (ret) { | |
6775 | mlog_errno(ret); | |
6776 | goto out; | |
6777 | } | |
6778 | ||
6779 | *credits = metas.credits; | |
6780 | ||
6781 | /* | |
6782 | * Calculate we need for refcount tree change. | |
6783 | * | |
6784 | * We need to add/modify num_recs in refcount tree, so just calculate | |
6785 | * an approximate number we need for refcount tree change. | |
6786 | * Sometimes we need to split the tree, and after split, half recs | |
6787 | * will be moved to the new block, and a new block can only provide | |
6788 | * half number of recs. So we multiple new blocks by 2. | |
6789 | * In the end, we have to add credits for modifying the already | |
6790 | * existed refcount block. | |
6791 | */ | |
6792 | rb = (struct ocfs2_refcount_block *)args->reflink->ref_root_bh->b_data; | |
6793 | metas.num_recs = | |
6794 | (metas.num_recs + ocfs2_refcount_recs_per_rb(osb->sb) - 1) / | |
6795 | ocfs2_refcount_recs_per_rb(osb->sb) * 2; | |
6796 | metas.num_metas += metas.num_recs; | |
6797 | *credits += metas.num_recs + | |
6798 | metas.num_recs * OCFS2_EXPAND_REFCOUNT_TREE_CREDITS; | |
6799 | if (le32_to_cpu(rb->rf_flags) & OCFS2_REFCOUNT_TREE_FL) | |
6800 | *credits += le16_to_cpu(rb->rf_list.l_tree_depth) * | |
6801 | le16_to_cpu(rb->rf_list.l_next_free_rec) + 1; | |
6802 | else | |
6803 | *credits += 1; | |
6804 | ||
6805 | /* count in the xattr tree change. */ | |
964f14a0 | 6806 | num_free_extents = ocfs2_num_free_extents(xt_et); |
2999d12f TM |
6807 | if (num_free_extents < 0) { |
6808 | ret = num_free_extents; | |
6809 | mlog_errno(ret); | |
6810 | goto out; | |
6811 | } | |
6812 | ||
6813 | if (num_free_extents < len) | |
6814 | metas.num_metas += ocfs2_extend_meta_needed(xt_et->et_root_el); | |
6815 | ||
6816 | *credits += ocfs2_calc_extend_credits(osb->sb, | |
06f9da6e | 6817 | xt_et->et_root_el); |
2999d12f TM |
6818 | |
6819 | if (metas.num_metas) { | |
6820 | ret = ocfs2_reserve_new_metadata_blocks(osb, metas.num_metas, | |
6821 | meta_ac); | |
6822 | if (ret) { | |
6823 | mlog_errno(ret); | |
6824 | goto out; | |
6825 | } | |
6826 | } | |
6827 | ||
6828 | if (len) { | |
6829 | ret = ocfs2_reserve_clusters(osb, len, data_ac); | |
6830 | if (ret) | |
6831 | mlog_errno(ret); | |
6832 | } | |
6833 | out: | |
6834 | if (ret) { | |
6835 | if (*meta_ac) { | |
6836 | ocfs2_free_alloc_context(*meta_ac); | |
6cae6d31 | 6837 | *meta_ac = NULL; |
2999d12f TM |
6838 | } |
6839 | } | |
6840 | ||
6841 | return ret; | |
6842 | } | |
6843 | ||
121a39bb | 6844 | static int ocfs2_reflink_xattr_bucket(handle_t *handle, |
2999d12f | 6845 | u64 blkno, u64 new_blkno, u32 clusters, |
121a39bb | 6846 | u32 *cpos, int num_buckets, |
2999d12f TM |
6847 | struct ocfs2_alloc_context *meta_ac, |
6848 | struct ocfs2_alloc_context *data_ac, | |
6849 | struct ocfs2_reflink_xattr_tree_args *args) | |
6850 | { | |
6851 | int i, j, ret = 0; | |
6852 | struct super_block *sb = args->reflink->old_inode->i_sb; | |
2999d12f TM |
6853 | int bpb = args->old_bucket->bu_blocks; |
6854 | struct ocfs2_xattr_value_buf vb = { | |
6855 | .vb_access = ocfs2_journal_access, | |
6856 | }; | |
6857 | ||
6858 | for (i = 0; i < num_buckets; i++, blkno += bpb, new_blkno += bpb) { | |
6859 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6860 | if (ret) { | |
6861 | mlog_errno(ret); | |
6862 | break; | |
6863 | } | |
6864 | ||
9c339255 | 6865 | ret = ocfs2_init_xattr_bucket(args->new_bucket, new_blkno, 1); |
2999d12f TM |
6866 | if (ret) { |
6867 | mlog_errno(ret); | |
6868 | break; | |
6869 | } | |
6870 | ||
2999d12f TM |
6871 | ret = ocfs2_xattr_bucket_journal_access(handle, |
6872 | args->new_bucket, | |
6873 | OCFS2_JOURNAL_ACCESS_CREATE); | |
6874 | if (ret) { | |
6875 | mlog_errno(ret); | |
6876 | break; | |
6877 | } | |
6878 | ||
6879 | for (j = 0; j < bpb; j++) | |
6880 | memcpy(bucket_block(args->new_bucket, j), | |
6881 | bucket_block(args->old_bucket, j), | |
6882 | sb->s_blocksize); | |
6883 | ||
121a39bb TM |
6884 | /* |
6885 | * Record the start cpos so that we can use it to initialize | |
6886 | * our xattr tree we also set the xh_num_bucket for the new | |
6887 | * bucket. | |
6888 | */ | |
6889 | if (i == 0) { | |
6890 | *cpos = le32_to_cpu(bucket_xh(args->new_bucket)-> | |
6891 | xh_entries[0].xe_name_hash); | |
6892 | bucket_xh(args->new_bucket)->xh_num_buckets = | |
6893 | cpu_to_le16(num_buckets); | |
6894 | } | |
6895 | ||
2999d12f TM |
6896 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); |
6897 | ||
6898 | ret = ocfs2_reflink_xattr_header(handle, args->reflink, | |
6899 | args->old_bucket->bu_bhs[0], | |
6900 | bucket_xh(args->old_bucket), | |
6901 | args->new_bucket->bu_bhs[0], | |
6902 | bucket_xh(args->new_bucket), | |
6903 | &vb, meta_ac, | |
6904 | ocfs2_get_reflink_xattr_value_root, | |
6905 | args); | |
6906 | if (ret) { | |
6907 | mlog_errno(ret); | |
6908 | break; | |
6909 | } | |
6910 | ||
6911 | /* | |
6912 | * Re-access and dirty the bucket to calculate metaecc. | |
6913 | * Because we may extend the transaction in reflink_xattr_header | |
6914 | * which will let the already accessed block gone. | |
6915 | */ | |
6916 | ret = ocfs2_xattr_bucket_journal_access(handle, | |
6917 | args->new_bucket, | |
6918 | OCFS2_JOURNAL_ACCESS_WRITE); | |
6919 | if (ret) { | |
6920 | mlog_errno(ret); | |
6921 | break; | |
6922 | } | |
6923 | ||
6924 | ocfs2_xattr_bucket_journal_dirty(handle, args->new_bucket); | |
121a39bb | 6925 | |
2999d12f TM |
6926 | ocfs2_xattr_bucket_relse(args->old_bucket); |
6927 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6928 | } | |
6929 | ||
6930 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6931 | ocfs2_xattr_bucket_relse(args->new_bucket); | |
6932 | return ret; | |
6933 | } | |
121a39bb TM |
6934 | |
6935 | static int ocfs2_reflink_xattr_buckets(handle_t *handle, | |
6936 | struct inode *inode, | |
6937 | struct ocfs2_reflink_xattr_tree_args *args, | |
6938 | struct ocfs2_extent_tree *et, | |
6939 | struct ocfs2_alloc_context *meta_ac, | |
6940 | struct ocfs2_alloc_context *data_ac, | |
6941 | u64 blkno, u32 cpos, u32 len) | |
6942 | { | |
6943 | int ret, first_inserted = 0; | |
6944 | u32 p_cluster, num_clusters, reflink_cpos = 0; | |
6945 | u64 new_blkno; | |
6946 | unsigned int num_buckets, reflink_buckets; | |
6947 | unsigned int bpc = | |
6948 | ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); | |
6949 | ||
6950 | ret = ocfs2_read_xattr_bucket(args->old_bucket, blkno); | |
6951 | if (ret) { | |
6952 | mlog_errno(ret); | |
6953 | goto out; | |
6954 | } | |
6955 | num_buckets = le16_to_cpu(bucket_xh(args->old_bucket)->xh_num_buckets); | |
6956 | ocfs2_xattr_bucket_relse(args->old_bucket); | |
6957 | ||
6958 | while (len && num_buckets) { | |
6959 | ret = ocfs2_claim_clusters(handle, data_ac, | |
6960 | 1, &p_cluster, &num_clusters); | |
6961 | if (ret) { | |
6962 | mlog_errno(ret); | |
6963 | goto out; | |
6964 | } | |
6965 | ||
6966 | new_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
6967 | reflink_buckets = min(num_buckets, bpc * num_clusters); | |
6968 | ||
6969 | ret = ocfs2_reflink_xattr_bucket(handle, blkno, | |
6970 | new_blkno, num_clusters, | |
6971 | &reflink_cpos, reflink_buckets, | |
6972 | meta_ac, data_ac, args); | |
6973 | if (ret) { | |
6974 | mlog_errno(ret); | |
6975 | goto out; | |
6976 | } | |
6977 | ||
6978 | /* | |
6979 | * For the 1st allocated cluster, we make it use the same cpos | |
6980 | * so that the xattr tree looks the same as the original one | |
6981 | * in the most case. | |
6982 | */ | |
6983 | if (!first_inserted) { | |
6984 | reflink_cpos = cpos; | |
6985 | first_inserted = 1; | |
6986 | } | |
6987 | ret = ocfs2_insert_extent(handle, et, reflink_cpos, new_blkno, | |
6988 | num_clusters, 0, meta_ac); | |
6989 | if (ret) | |
6990 | mlog_errno(ret); | |
6991 | ||
402b4183 TM |
6992 | trace_ocfs2_reflink_xattr_buckets((unsigned long long)new_blkno, |
6993 | num_clusters, reflink_cpos); | |
121a39bb TM |
6994 | |
6995 | len -= num_clusters; | |
6996 | blkno += ocfs2_clusters_to_blocks(inode->i_sb, num_clusters); | |
6997 | num_buckets -= reflink_buckets; | |
6998 | } | |
6999 | out: | |
7000 | return ret; | |
7001 | } | |
7002 | ||
2999d12f TM |
7003 | /* |
7004 | * Create the same xattr extent record in the new inode's xattr tree. | |
7005 | */ | |
7006 | static int ocfs2_reflink_xattr_rec(struct inode *inode, | |
7007 | struct buffer_head *root_bh, | |
7008 | u64 blkno, | |
7009 | u32 cpos, | |
7010 | u32 len, | |
7011 | void *para) | |
7012 | { | |
7013 | int ret, credits = 0; | |
2999d12f TM |
7014 | handle_t *handle; |
7015 | struct ocfs2_reflink_xattr_tree_args *args = | |
7016 | (struct ocfs2_reflink_xattr_tree_args *)para; | |
7017 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
7018 | struct ocfs2_alloc_context *meta_ac = NULL; | |
7019 | struct ocfs2_alloc_context *data_ac = NULL; | |
7020 | struct ocfs2_extent_tree et; | |
7021 | ||
402b4183 | 7022 | trace_ocfs2_reflink_xattr_rec((unsigned long long)blkno, len); |
121a39bb | 7023 | |
2999d12f TM |
7024 | ocfs2_init_xattr_tree_extent_tree(&et, |
7025 | INODE_CACHE(args->reflink->new_inode), | |
7026 | args->new_blk_bh); | |
7027 | ||
7028 | ret = ocfs2_lock_reflink_xattr_rec_allocators(args, &et, blkno, | |
7029 | len, &credits, | |
7030 | &meta_ac, &data_ac); | |
7031 | if (ret) { | |
7032 | mlog_errno(ret); | |
7033 | goto out; | |
7034 | } | |
7035 | ||
7036 | handle = ocfs2_start_trans(osb, credits); | |
7037 | if (IS_ERR(handle)) { | |
7038 | ret = PTR_ERR(handle); | |
7039 | mlog_errno(ret); | |
7040 | goto out; | |
7041 | } | |
7042 | ||
121a39bb TM |
7043 | ret = ocfs2_reflink_xattr_buckets(handle, inode, args, &et, |
7044 | meta_ac, data_ac, | |
7045 | blkno, cpos, len); | |
2999d12f TM |
7046 | if (ret) |
7047 | mlog_errno(ret); | |
7048 | ||
2999d12f TM |
7049 | ocfs2_commit_trans(osb, handle); |
7050 | ||
7051 | out: | |
7052 | if (meta_ac) | |
7053 | ocfs2_free_alloc_context(meta_ac); | |
7054 | if (data_ac) | |
7055 | ocfs2_free_alloc_context(data_ac); | |
7056 | return ret; | |
7057 | } | |
7058 | ||
7059 | /* | |
7060 | * Create reflinked xattr buckets. | |
7061 | * We will add bucket one by one, and refcount all the xattrs in the bucket | |
7062 | * if they are stored outside. | |
7063 | */ | |
7064 | static int ocfs2_reflink_xattr_tree(struct ocfs2_xattr_reflink *args, | |
7065 | struct buffer_head *blk_bh, | |
7066 | struct buffer_head *new_blk_bh) | |
7067 | { | |
7068 | int ret; | |
7069 | struct ocfs2_reflink_xattr_tree_args para; | |
7070 | ||
7071 | memset(¶, 0, sizeof(para)); | |
7072 | para.reflink = args; | |
7073 | para.old_blk_bh = blk_bh; | |
7074 | para.new_blk_bh = new_blk_bh; | |
7075 | ||
7076 | para.old_bucket = ocfs2_xattr_bucket_new(args->old_inode); | |
7077 | if (!para.old_bucket) { | |
7078 | mlog_errno(-ENOMEM); | |
7079 | return -ENOMEM; | |
7080 | } | |
7081 | ||
7082 | para.new_bucket = ocfs2_xattr_bucket_new(args->new_inode); | |
7083 | if (!para.new_bucket) { | |
7084 | ret = -ENOMEM; | |
7085 | mlog_errno(ret); | |
7086 | goto out; | |
7087 | } | |
7088 | ||
7089 | ret = ocfs2_iterate_xattr_index_block(args->old_inode, blk_bh, | |
7090 | ocfs2_reflink_xattr_rec, | |
7091 | ¶); | |
7092 | if (ret) | |
7093 | mlog_errno(ret); | |
7094 | ||
7095 | out: | |
7096 | ocfs2_xattr_bucket_free(para.old_bucket); | |
7097 | ocfs2_xattr_bucket_free(para.new_bucket); | |
7098 | return ret; | |
7099 | } | |
7100 | ||
7101 | static int ocfs2_reflink_xattr_in_block(struct ocfs2_xattr_reflink *args, | |
7102 | struct buffer_head *blk_bh) | |
7103 | { | |
7104 | int ret, indexed = 0; | |
7105 | struct buffer_head *new_blk_bh = NULL; | |
7106 | struct ocfs2_xattr_block *xb = | |
7107 | (struct ocfs2_xattr_block *)blk_bh->b_data; | |
7108 | ||
7109 | ||
7110 | if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) | |
7111 | indexed = 1; | |
7112 | ||
7113 | ret = ocfs2_create_empty_xattr_block(args->new_inode, args->new_bh, | |
7114 | &new_blk_bh, indexed); | |
7115 | if (ret) { | |
7116 | mlog_errno(ret); | |
7117 | goto out; | |
7118 | } | |
7119 | ||
2decd65a | 7120 | if (!indexed) |
2999d12f TM |
7121 | ret = ocfs2_reflink_xattr_block(args, blk_bh, new_blk_bh); |
7122 | else | |
7123 | ret = ocfs2_reflink_xattr_tree(args, blk_bh, new_blk_bh); | |
7124 | if (ret) | |
7125 | mlog_errno(ret); | |
7126 | ||
7127 | out: | |
7128 | brelse(new_blk_bh); | |
7129 | return ret; | |
7130 | } | |
7131 | ||
0fe9b66c TM |
7132 | static int ocfs2_reflink_xattr_no_security(struct ocfs2_xattr_entry *xe) |
7133 | { | |
7134 | int type = ocfs2_xattr_get_type(xe); | |
7135 | ||
7136 | return type != OCFS2_XATTR_INDEX_SECURITY && | |
7137 | type != OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS && | |
7138 | type != OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; | |
7139 | } | |
7140 | ||
2999d12f TM |
7141 | int ocfs2_reflink_xattrs(struct inode *old_inode, |
7142 | struct buffer_head *old_bh, | |
7143 | struct inode *new_inode, | |
0fe9b66c TM |
7144 | struct buffer_head *new_bh, |
7145 | bool preserve_security) | |
2999d12f TM |
7146 | { |
7147 | int ret; | |
7148 | struct ocfs2_xattr_reflink args; | |
7149 | struct ocfs2_inode_info *oi = OCFS2_I(old_inode); | |
7150 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)old_bh->b_data; | |
7151 | struct buffer_head *blk_bh = NULL; | |
7152 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
7153 | struct ocfs2_refcount_tree *ref_tree; | |
7154 | struct buffer_head *ref_root_bh = NULL; | |
7155 | ||
7156 | ret = ocfs2_lock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7157 | le64_to_cpu(di->i_refcount_loc), | |
7158 | 1, &ref_tree, &ref_root_bh); | |
7159 | if (ret) { | |
7160 | mlog_errno(ret); | |
7161 | goto out; | |
7162 | } | |
7163 | ||
7164 | ocfs2_init_dealloc_ctxt(&dealloc); | |
7165 | ||
7166 | args.old_inode = old_inode; | |
7167 | args.new_inode = new_inode; | |
7168 | args.old_bh = old_bh; | |
7169 | args.new_bh = new_bh; | |
7170 | args.ref_ci = &ref_tree->rf_ci; | |
7171 | args.ref_root_bh = ref_root_bh; | |
7172 | args.dealloc = &dealloc; | |
0fe9b66c TM |
7173 | if (preserve_security) |
7174 | args.xattr_reflinked = NULL; | |
7175 | else | |
7176 | args.xattr_reflinked = ocfs2_reflink_xattr_no_security; | |
2999d12f TM |
7177 | |
7178 | if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
7179 | ret = ocfs2_reflink_xattr_inline(&args); | |
7180 | if (ret) { | |
7181 | mlog_errno(ret); | |
7182 | goto out_unlock; | |
7183 | } | |
7184 | } | |
7185 | ||
7186 | if (!di->i_xattr_loc) | |
7187 | goto out_unlock; | |
7188 | ||
7189 | ret = ocfs2_read_xattr_block(old_inode, le64_to_cpu(di->i_xattr_loc), | |
7190 | &blk_bh); | |
7191 | if (ret < 0) { | |
7192 | mlog_errno(ret); | |
7193 | goto out_unlock; | |
7194 | } | |
7195 | ||
7196 | ret = ocfs2_reflink_xattr_in_block(&args, blk_bh); | |
7197 | if (ret) | |
7198 | mlog_errno(ret); | |
7199 | ||
7200 | brelse(blk_bh); | |
7201 | ||
7202 | out_unlock: | |
7203 | ocfs2_unlock_refcount_tree(OCFS2_SB(old_inode->i_sb), | |
7204 | ref_tree, 1); | |
7205 | brelse(ref_root_bh); | |
7206 | ||
7207 | if (ocfs2_dealloc_has_cluster(&dealloc)) { | |
7208 | ocfs2_schedule_truncate_log_flush(OCFS2_SB(old_inode->i_sb), 1); | |
7209 | ocfs2_run_deallocs(OCFS2_SB(old_inode->i_sb), &dealloc); | |
7210 | } | |
7211 | ||
7212 | out: | |
7213 | return ret; | |
7214 | } | |
7215 | ||
0fe9b66c TM |
7216 | /* |
7217 | * Initialize security and acl for a already created inode. | |
7218 | * Used for reflink a non-preserve-security file. | |
7219 | * | |
7220 | * It uses common api like ocfs2_xattr_set, so the caller | |
7221 | * must not hold any lock expect i_mutex. | |
7222 | */ | |
7223 | int ocfs2_init_security_and_acl(struct inode *dir, | |
2a7dba39 | 7224 | struct inode *inode, |
c25a1e06 | 7225 | const struct qstr *qstr) |
0fe9b66c | 7226 | { |
702e5bc6 | 7227 | int ret = 0; |
c25a1e06 | 7228 | struct buffer_head *dir_bh = NULL; |
0fe9b66c | 7229 | |
9d8f13ba | 7230 | ret = ocfs2_init_security_get(inode, dir, qstr, NULL); |
32918dd9 | 7231 | if (ret) { |
0fe9b66c TM |
7232 | mlog_errno(ret); |
7233 | goto leave; | |
7234 | } | |
7235 | ||
7236 | ret = ocfs2_inode_lock(dir, &dir_bh, 0); | |
7237 | if (ret) { | |
7238 | mlog_errno(ret); | |
7239 | goto leave; | |
7240 | } | |
c25a1e06 JB |
7241 | ret = ocfs2_init_acl(NULL, inode, dir, NULL, dir_bh, NULL, NULL); |
7242 | if (ret) | |
7243 | mlog_errno(ret); | |
0fe9b66c TM |
7244 | |
7245 | ocfs2_inode_unlock(dir, 0); | |
7246 | brelse(dir_bh); | |
7247 | leave: | |
7248 | return ret; | |
7249 | } | |
1046cb11 | 7250 | |
923f7f31 TY |
7251 | /* |
7252 | * 'security' attributes support | |
7253 | */ | |
d9a82a04 | 7254 | static int ocfs2_xattr_security_get(const struct xattr_handler *handler, |
b296821a AV |
7255 | struct dentry *unused, struct inode *inode, |
7256 | const char *name, void *buffer, size_t size) | |
923f7f31 | 7257 | { |
b296821a | 7258 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, |
431547b3 | 7259 | name, buffer, size); |
923f7f31 TY |
7260 | } |
7261 | ||
d9a82a04 | 7262 | static int ocfs2_xattr_security_set(const struct xattr_handler *handler, |
59301226 AV |
7263 | struct dentry *unused, struct inode *inode, |
7264 | const char *name, const void *value, | |
7265 | size_t size, int flags) | |
923f7f31 | 7266 | { |
59301226 | 7267 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, |
431547b3 | 7268 | name, value, size, flags); |
923f7f31 TY |
7269 | } |
7270 | ||
b519ea6d | 7271 | static int ocfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array, |
9d8f13ba MZ |
7272 | void *fs_info) |
7273 | { | |
7274 | const struct xattr *xattr; | |
7275 | int err = 0; | |
7276 | ||
7277 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { | |
7278 | err = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, | |
7279 | xattr->name, xattr->value, | |
7280 | xattr->value_len, XATTR_CREATE); | |
7281 | if (err) | |
7282 | break; | |
7283 | } | |
7284 | return err; | |
7285 | } | |
7286 | ||
534eaddd TY |
7287 | int ocfs2_init_security_get(struct inode *inode, |
7288 | struct inode *dir, | |
2a7dba39 | 7289 | const struct qstr *qstr, |
534eaddd TY |
7290 | struct ocfs2_security_xattr_info *si) |
7291 | { | |
38d59ef6 TY |
7292 | /* check whether ocfs2 support feature xattr */ |
7293 | if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) | |
7294 | return -EOPNOTSUPP; | |
9d8f13ba MZ |
7295 | if (si) |
7296 | return security_old_inode_init_security(inode, dir, qstr, | |
7297 | &si->name, &si->value, | |
7298 | &si->value_len); | |
7299 | ||
7300 | return security_inode_init_security(inode, dir, qstr, | |
7301 | &ocfs2_initxattrs, NULL); | |
534eaddd TY |
7302 | } |
7303 | ||
7304 | int ocfs2_init_security_set(handle_t *handle, | |
7305 | struct inode *inode, | |
7306 | struct buffer_head *di_bh, | |
7307 | struct ocfs2_security_xattr_info *si, | |
7308 | struct ocfs2_alloc_context *xattr_ac, | |
7309 | struct ocfs2_alloc_context *data_ac) | |
7310 | { | |
7311 | return ocfs2_xattr_set_handle(handle, inode, di_bh, | |
7312 | OCFS2_XATTR_INDEX_SECURITY, | |
7313 | si->name, si->value, si->value_len, 0, | |
7314 | xattr_ac, data_ac); | |
7315 | } | |
7316 | ||
537d81ca | 7317 | const struct xattr_handler ocfs2_xattr_security_handler = { |
923f7f31 | 7318 | .prefix = XATTR_SECURITY_PREFIX, |
923f7f31 TY |
7319 | .get = ocfs2_xattr_security_get, |
7320 | .set = ocfs2_xattr_security_set, | |
7321 | }; | |
7322 | ||
99219aea MF |
7323 | /* |
7324 | * 'trusted' attributes support | |
7325 | */ | |
d9a82a04 | 7326 | static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler, |
b296821a AV |
7327 | struct dentry *unused, struct inode *inode, |
7328 | const char *name, void *buffer, size_t size) | |
99219aea | 7329 | { |
b296821a | 7330 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, |
431547b3 | 7331 | name, buffer, size); |
99219aea MF |
7332 | } |
7333 | ||
d9a82a04 | 7334 | static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler, |
59301226 AV |
7335 | struct dentry *unused, struct inode *inode, |
7336 | const char *name, const void *value, | |
7337 | size_t size, int flags) | |
99219aea | 7338 | { |
59301226 | 7339 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, |
431547b3 | 7340 | name, value, size, flags); |
99219aea MF |
7341 | } |
7342 | ||
537d81ca | 7343 | const struct xattr_handler ocfs2_xattr_trusted_handler = { |
99219aea | 7344 | .prefix = XATTR_TRUSTED_PREFIX, |
99219aea MF |
7345 | .get = ocfs2_xattr_trusted_get, |
7346 | .set = ocfs2_xattr_trusted_set, | |
7347 | }; | |
7348 | ||
99219aea MF |
7349 | /* |
7350 | * 'user' attributes support | |
7351 | */ | |
d9a82a04 | 7352 | static int ocfs2_xattr_user_get(const struct xattr_handler *handler, |
84d86e6d | 7353 | struct dentry *unused, struct inode *inode, |
b296821a | 7354 | const char *name, void *buffer, size_t size) |
99219aea | 7355 | { |
b296821a | 7356 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
99219aea | 7357 | |
99219aea MF |
7358 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
7359 | return -EOPNOTSUPP; | |
b296821a | 7360 | return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, |
99219aea MF |
7361 | buffer, size); |
7362 | } | |
7363 | ||
d9a82a04 | 7364 | static int ocfs2_xattr_user_set(const struct xattr_handler *handler, |
59301226 AV |
7365 | struct dentry *unused, struct inode *inode, |
7366 | const char *name, const void *value, | |
7367 | size_t size, int flags) | |
99219aea | 7368 | { |
59301226 | 7369 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
99219aea | 7370 | |
99219aea MF |
7371 | if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) |
7372 | return -EOPNOTSUPP; | |
7373 | ||
59301226 | 7374 | return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, |
431547b3 | 7375 | name, value, size, flags); |
99219aea MF |
7376 | } |
7377 | ||
537d81ca | 7378 | const struct xattr_handler ocfs2_xattr_user_handler = { |
99219aea | 7379 | .prefix = XATTR_USER_PREFIX, |
99219aea MF |
7380 | .get = ocfs2_xattr_user_get, |
7381 | .set = ocfs2_xattr_user_set, | |
7382 | }; |