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Commit | Line | Data |
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2cb7cef9 BS |
1 | From: Tiger Yang <tiger.yang@oracle.com> |
2 | Subject: [PATCH 09/16] ocfs2: Add extended attribute support | |
3 | Patch-mainline: 2.6.28? | |
4 | References: FATE302067 | |
5 | ||
6 | This patch implements storing extended attributes both in inode or a single | |
7 | external block. We only store EA's in-inode when blocksize > 512 or that | |
8 | inode block has free space for it. When an EA's value is larger than 80 | |
9 | bytes, we will store the value via b-tree outside inode or block. | |
10 | ||
11 | Signed-off-by: Tiger Yang <tiger.yang@oracle.com> | |
12 | Signed-off-by: Mark Fasheh <mfasheh@suse.com> | |
13 | --- | |
14 | fs/ocfs2/Makefile | 2 | |
15 | fs/ocfs2/file.c | 5 | |
16 | fs/ocfs2/inode.c | 8 | |
17 | fs/ocfs2/inode.h | 3 | |
18 | fs/ocfs2/journal.h | 10 | |
19 | fs/ocfs2/namei.c | 5 | |
20 | fs/ocfs2/ocfs2.h | 2 | |
21 | fs/ocfs2/ocfs2_fs.h | 8 | |
22 | fs/ocfs2/suballoc.c | 17 | |
23 | fs/ocfs2/suballoc.h | 3 | |
24 | fs/ocfs2/super.c | 14 | |
25 | fs/ocfs2/symlink.c | 9 | |
26 | fs/ocfs2/xattr.c | 1636 +++++++++++++++++++++++++++++++++++++++++++++++ | |
27 | fs/ocfs2/xattr.h | 58 + | |
28 | fs/ocfs2/xattr_trusted.c | 82 ++ | |
29 | fs/ocfs2/xattr_user.c | 94 ++ | |
30 | 16 files changed, 1950 insertions(+), 6 deletions(-) | |
31 | create mode 100644 fs/ocfs2/xattr.h | |
32 | create mode 100644 fs/ocfs2/xattr_trusted.c | |
33 | create mode 100644 fs/ocfs2/xattr_user.c | |
34 | ||
35 | --- a/fs/ocfs2/Makefile | |
36 | +++ b/fs/ocfs2/Makefile | |
37 | @@ -36,6 +36,8 @@ ocfs2-objs := \ | |
38 | uptodate.o \ | |
39 | ver.o \ | |
40 | xattr.o \ | |
41 | + xattr_user.o \ | |
42 | + xattr_trusted.o | |
43 | ||
44 | ocfs2_stackglue-objs := stackglue.o | |
45 | ocfs2_stack_o2cb-objs := stack_o2cb.o | |
46 | --- a/fs/ocfs2/file.c | |
47 | +++ b/fs/ocfs2/file.c | |
48 | @@ -55,6 +55,7 @@ | |
49 | #include "mmap.h" | |
50 | #include "suballoc.h" | |
51 | #include "super.h" | |
52 | +#include "xattr.h" | |
53 | ||
54 | #include "buffer_head_io.h" | |
55 | ||
56 | @@ -2130,6 +2131,10 @@ const struct inode_operations ocfs2_file | |
57 | .setattr = ocfs2_setattr, | |
58 | .getattr = ocfs2_getattr, | |
59 | .permission = ocfs2_permission, | |
60 | + .setxattr = generic_setxattr, | |
61 | + .getxattr = generic_getxattr, | |
62 | + .listxattr = ocfs2_listxattr, | |
63 | + .removexattr = generic_removexattr, | |
64 | .fallocate = ocfs2_fallocate, | |
65 | }; | |
66 | ||
67 | --- a/fs/ocfs2/inode.c | |
68 | +++ b/fs/ocfs2/inode.c | |
69 | @@ -49,6 +49,7 @@ | |
70 | #include "symlink.h" | |
71 | #include "sysfile.h" | |
72 | #include "uptodate.h" | |
73 | +#include "xattr.h" | |
74 | ||
75 | #include "buffer_head_io.h" | |
76 | ||
77 | @@ -728,6 +729,13 @@ static int ocfs2_wipe_inode(struct inode | |
78 | if (status < 0) { | |
79 | mlog_errno(status); | |
80 | goto bail_unlock_dir; | |
81 | + } | |
82 | + | |
83 | + /*Free extended attribute resources associated with this inode.*/ | |
84 | + status = ocfs2_xattr_remove(inode, di_bh); | |
85 | + if (status < 0) { | |
86 | + mlog_errno(status); | |
87 | + goto bail_unlock_dir; | |
88 | } | |
89 | ||
90 | status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode, | |
91 | --- a/fs/ocfs2/inode.h | |
92 | +++ b/fs/ocfs2/inode.h | |
93 | @@ -40,6 +40,9 @@ struct ocfs2_inode_info | |
94 | /* protects allocation changes on this inode. */ | |
95 | struct rw_semaphore ip_alloc_sem; | |
96 | ||
97 | + /* protects extended attribute changes on this inode */ | |
98 | + struct rw_semaphore ip_xattr_sem; | |
99 | + | |
100 | /* These fields are protected by ip_lock */ | |
101 | spinlock_t ip_lock; | |
102 | u32 ip_open_count; | |
103 | --- a/fs/ocfs2/journal.h | |
104 | +++ b/fs/ocfs2/journal.h | |
105 | @@ -283,6 +283,9 @@ int ocfs2_journal_dirty | |
106 | /* simple file updates like chmod, etc. */ | |
107 | #define OCFS2_INODE_UPDATE_CREDITS 1 | |
108 | ||
109 | +/* extended attribute block update */ | |
110 | +#define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1 | |
111 | + | |
112 | /* group extend. inode update and last group update. */ | |
113 | #define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1) | |
114 | ||
115 | @@ -340,6 +343,13 @@ int ocfs2_journal_dirty | |
116 | #define OCFS2_RENAME_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 3 \ | |
117 | + OCFS2_UNLINK_CREDITS) | |
118 | ||
119 | +/* global bitmap dinode, group desc., relinked group, | |
120 | + * suballocator dinode, group desc., relinked group, | |
121 | + * dinode, xattr block */ | |
122 | +#define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \ | |
123 | + + OCFS2_INODE_UPDATE_CREDITS \ | |
124 | + + OCFS2_XATTR_BLOCK_UPDATE_CREDITS) | |
125 | + | |
126 | /* | |
127 | * Please note that the caller must make sure that root_el is the root | |
128 | * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise | |
129 | --- a/fs/ocfs2/namei.c | |
130 | +++ b/fs/ocfs2/namei.c | |
131 | @@ -60,6 +60,7 @@ | |
132 | #include "symlink.h" | |
133 | #include "sysfile.h" | |
134 | #include "uptodate.h" | |
135 | +#include "xattr.h" | |
136 | ||
137 | #include "buffer_head_io.h" | |
138 | ||
139 | @@ -1918,4 +1919,8 @@ const struct inode_operations ocfs2_dir_ | |
140 | .setattr = ocfs2_setattr, | |
141 | .getattr = ocfs2_getattr, | |
142 | .permission = ocfs2_permission, | |
143 | + .setxattr = generic_setxattr, | |
144 | + .getxattr = generic_getxattr, | |
145 | + .listxattr = ocfs2_listxattr, | |
146 | + .removexattr = generic_removexattr, | |
147 | }; | |
148 | --- a/fs/ocfs2/ocfs2.h | |
149 | +++ b/fs/ocfs2/ocfs2.h | |
150 | @@ -184,6 +184,7 @@ enum ocfs2_mount_options | |
151 | OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */ | |
152 | OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */ | |
153 | OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */ | |
154 | + OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */ | |
155 | }; | |
156 | ||
157 | #define OCFS2_OSB_SOFT_RO 0x0001 | |
158 | @@ -214,6 +215,7 @@ struct ocfs2_super | |
159 | u32 bitmap_cpg; | |
160 | u8 *uuid; | |
161 | char *uuid_str; | |
162 | + u32 uuid_hash; | |
163 | u8 *vol_label; | |
164 | u64 first_cluster_group_blkno; | |
165 | u32 fs_generation; | |
166 | --- a/fs/ocfs2/ocfs2_fs.h | |
167 | +++ b/fs/ocfs2/ocfs2_fs.h | |
168 | @@ -570,7 +570,7 @@ struct ocfs2_super_block { | |
169 | /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts | |
170 | before tunefs required */ | |
171 | __le16 s_tunefs_flag; | |
172 | - __le32 s_reserved1; | |
173 | + __le32 s_uuid_hash; /* hash value of uuid */ | |
174 | __le64 s_first_cluster_group; /* Block offset of 1st cluster | |
175 | * group header */ | |
176 | /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */ | |
177 | @@ -787,7 +787,11 @@ struct ocfs2_xattr_tree_root { | |
178 | /*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */ | |
179 | }; | |
180 | ||
181 | -#define OCFS2_XATTR_INDEXED 0x1 | |
182 | +#define OCFS2_XATTR_INDEXED 0x1 | |
183 | +#define OCFS2_HASH_SHIFT 5 | |
184 | +#define OCFS2_XATTR_ROUND 3 | |
185 | +#define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \ | |
186 | + ~(OCFS2_XATTR_ROUND)) | |
187 | ||
188 | /* | |
189 | * On disk structure for xattr block. | |
190 | --- a/fs/ocfs2/suballoc.c | |
191 | +++ b/fs/ocfs2/suballoc.c | |
192 | @@ -493,9 +493,9 @@ bail: | |
193 | return status; | |
194 | } | |
195 | ||
196 | -int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, | |
197 | - struct ocfs2_extent_list *root_el, | |
198 | - struct ocfs2_alloc_context **ac) | |
199 | +int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, | |
200 | + int blocks, | |
201 | + struct ocfs2_alloc_context **ac) | |
202 | { | |
203 | int status; | |
204 | u32 slot; | |
205 | @@ -507,7 +507,7 @@ int ocfs2_reserve_new_metadata(struct oc | |
206 | goto bail; | |
207 | } | |
208 | ||
209 | - (*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(root_el); | |
210 | + (*ac)->ac_bits_wanted = blocks; | |
211 | (*ac)->ac_which = OCFS2_AC_USE_META; | |
212 | slot = osb->slot_num; | |
213 | (*ac)->ac_group_search = ocfs2_block_group_search; | |
214 | @@ -532,6 +532,15 @@ bail: | |
215 | return status; | |
216 | } | |
217 | ||
218 | +int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, | |
219 | + struct ocfs2_extent_list *root_el, | |
220 | + struct ocfs2_alloc_context **ac) | |
221 | +{ | |
222 | + return ocfs2_reserve_new_metadata_blocks(osb, | |
223 | + ocfs2_extend_meta_needed(root_el), | |
224 | + ac); | |
225 | +} | |
226 | + | |
227 | static int ocfs2_steal_inode_from_other_nodes(struct ocfs2_super *osb, | |
228 | struct ocfs2_alloc_context *ac) | |
229 | { | |
230 | --- a/fs/ocfs2/suballoc.h | |
231 | +++ b/fs/ocfs2/suballoc.h | |
232 | @@ -67,6 +67,9 @@ static inline int ocfs2_alloc_context_bi | |
233 | int ocfs2_reserve_new_metadata(struct ocfs2_super *osb, | |
234 | struct ocfs2_extent_list *root_el, | |
235 | struct ocfs2_alloc_context **ac); | |
236 | +int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb, | |
237 | + int blocks, | |
238 | + struct ocfs2_alloc_context **ac); | |
239 | int ocfs2_reserve_new_inode(struct ocfs2_super *osb, | |
240 | struct ocfs2_alloc_context **ac); | |
241 | int ocfs2_reserve_clusters(struct ocfs2_super *osb, | |
242 | --- a/fs/ocfs2/super.c | |
243 | +++ b/fs/ocfs2/super.c | |
244 | @@ -64,6 +64,7 @@ | |
245 | #include "sysfile.h" | |
246 | #include "uptodate.h" | |
247 | #include "ver.h" | |
248 | +#include "xattr.h" | |
249 | ||
250 | #include "buffer_head_io.h" | |
251 | ||
252 | @@ -154,6 +155,8 @@ enum { | |
253 | Opt_localalloc, | |
254 | Opt_localflocks, | |
255 | Opt_stack, | |
256 | + Opt_user_xattr, | |
257 | + Opt_nouser_xattr, | |
258 | Opt_err, | |
259 | }; | |
260 | ||
261 | @@ -173,6 +176,8 @@ static match_table_t tokens = { | |
262 | {Opt_localalloc, "localalloc=%d"}, | |
263 | {Opt_localflocks, "localflocks"}, | |
264 | {Opt_stack, "cluster_stack=%s"}, | |
265 | + {Opt_user_xattr, "user_xattr"}, | |
266 | + {Opt_nouser_xattr, "nouser_xattr"}, | |
267 | {Opt_err, NULL} | |
268 | }; | |
269 | ||
270 | @@ -847,6 +852,12 @@ static int ocfs2_parse_options(struct su | |
271 | case Opt_data_writeback: | |
272 | mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; | |
273 | break; | |
274 | + case Opt_user_xattr: | |
275 | + mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR; | |
276 | + break; | |
277 | + case Opt_nouser_xattr: | |
278 | + mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR; | |
279 | + break; | |
280 | case Opt_atime_quantum: | |
281 | if (match_int(&args[0], &option)) { | |
282 | status = 0; | |
283 | @@ -1132,6 +1143,7 @@ static void ocfs2_inode_init_once(void * | |
284 | oi->ip_dir_start_lookup = 0; | |
285 | ||
286 | init_rwsem(&oi->ip_alloc_sem); | |
287 | + init_rwsem(&oi->ip_xattr_sem); | |
288 | mutex_init(&oi->ip_io_mutex); | |
289 | ||
290 | oi->ip_blkno = 0ULL; | |
291 | @@ -1375,6 +1387,7 @@ static int ocfs2_initialize_super(struct | |
292 | sb->s_fs_info = osb; | |
293 | sb->s_op = &ocfs2_sops; | |
294 | sb->s_export_op = &ocfs2_export_ops; | |
295 | + sb->s_xattr = ocfs2_xattr_handlers; | |
296 | sb->s_time_gran = 1; | |
297 | sb->s_flags |= MS_NOATIME; | |
298 | /* this is needed to support O_LARGEFILE */ | |
299 | @@ -1570,6 +1583,7 @@ static int ocfs2_initialize_super(struct | |
300 | osb->first_cluster_group_blkno = | |
301 | le64_to_cpu(di->id2.i_super.s_first_cluster_group); | |
302 | osb->fs_generation = le32_to_cpu(di->i_fs_generation); | |
303 | + osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash); | |
304 | mlog(0, "vol_label: %s\n", osb->vol_label); | |
305 | mlog(0, "uuid: %s\n", osb->uuid_str); | |
306 | mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", | |
307 | --- a/fs/ocfs2/symlink.c | |
308 | +++ b/fs/ocfs2/symlink.c | |
309 | @@ -50,6 +50,7 @@ | |
310 | #include "inode.h" | |
311 | #include "journal.h" | |
312 | #include "symlink.h" | |
313 | +#include "xattr.h" | |
314 | ||
315 | #include "buffer_head_io.h" | |
316 | ||
317 | @@ -168,10 +169,18 @@ const struct inode_operations ocfs2_syml | |
318 | .follow_link = ocfs2_follow_link, | |
319 | .getattr = ocfs2_getattr, | |
320 | .setattr = ocfs2_setattr, | |
321 | + .setxattr = generic_setxattr, | |
322 | + .getxattr = generic_getxattr, | |
323 | + .listxattr = ocfs2_listxattr, | |
324 | + .removexattr = generic_removexattr, | |
325 | }; | |
326 | const struct inode_operations ocfs2_fast_symlink_inode_operations = { | |
327 | .readlink = ocfs2_readlink, | |
328 | .follow_link = ocfs2_follow_link, | |
329 | .getattr = ocfs2_getattr, | |
330 | .setattr = ocfs2_setattr, | |
331 | + .setxattr = generic_setxattr, | |
332 | + .getxattr = generic_getxattr, | |
333 | + .listxattr = ocfs2_listxattr, | |
334 | + .removexattr = generic_removexattr, | |
335 | }; | |
336 | --- a/fs/ocfs2/xattr.c | |
337 | +++ b/fs/ocfs2/xattr.c | |
338 | @@ -5,6 +5,9 @@ | |
339 | * | |
340 | * Copyright (C) 2008 Oracle. All rights reserved. | |
341 | * | |
342 | + * CREDITS: | |
343 | + * Lots of code in this file is taken from ext3. | |
344 | + * | |
345 | * This program is free software; you can redistribute it and/or | |
346 | * modify it under the terms of the GNU General Public | |
347 | * License as published by the Free Software Foundation; either | |
348 | @@ -21,6 +24,19 @@ | |
349 | * Boston, MA 021110-1307, USA. | |
350 | */ | |
351 | ||
352 | +#include <linux/capability.h> | |
353 | +#include <linux/fs.h> | |
354 | +#include <linux/types.h> | |
355 | +#include <linux/slab.h> | |
356 | +#include <linux/highmem.h> | |
357 | +#include <linux/pagemap.h> | |
358 | +#include <linux/uio.h> | |
359 | +#include <linux/sched.h> | |
360 | +#include <linux/splice.h> | |
361 | +#include <linux/mount.h> | |
362 | +#include <linux/writeback.h> | |
363 | +#include <linux/falloc.h> | |
364 | + | |
365 | #define MLOG_MASK_PREFIX ML_XATTR | |
366 | #include <cluster/masklog.h> | |
367 | ||
368 | @@ -28,12 +44,135 @@ | |
369 | #include "alloc.h" | |
370 | #include "dlmglue.h" | |
371 | #include "file.h" | |
372 | +#include "symlink.h" | |
373 | +#include "sysfile.h" | |
374 | #include "inode.h" | |
375 | #include "journal.h" | |
376 | #include "ocfs2_fs.h" | |
377 | #include "suballoc.h" | |
378 | #include "uptodate.h" | |
379 | #include "buffer_head_io.h" | |
380 | +#include "xattr.h" | |
381 | + | |
382 | + | |
383 | +struct ocfs2_xattr_def_value_root { | |
384 | + struct ocfs2_xattr_value_root xv; | |
385 | + struct ocfs2_extent_rec er; | |
386 | +}; | |
387 | + | |
388 | +#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) | |
389 | +#define OCFS2_XATTR_INLINE_SIZE 80 | |
390 | + | |
391 | +static struct ocfs2_xattr_def_value_root def_xv = { | |
392 | + .xv.xr_list.l_count = cpu_to_le16(1), | |
393 | +}; | |
394 | + | |
395 | +struct xattr_handler *ocfs2_xattr_handlers[] = { | |
396 | + &ocfs2_xattr_user_handler, | |
397 | +#ifdef CONFIG_OCFS2_FS_POSIX_ACL | |
398 | + &ocfs2_xattr_acl_access_handler, | |
399 | + &ocfs2_xattr_acl_default_handler, | |
400 | +#endif | |
401 | + &ocfs2_xattr_trusted_handler, | |
402 | +#ifdef CONFIG_OCFS2_FS_SECURITY | |
403 | + &ocfs2_xattr_security_handler, | |
404 | +#endif | |
405 | + NULL | |
406 | +}; | |
407 | + | |
408 | +static struct xattr_handler *ocfs2_xattr_handler_map[] = { | |
409 | + [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, | |
410 | +#ifdef CONFIG_OCFS2_FS_POSIX_ACL | |
411 | + [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] | |
412 | + = &ocfs2_xattr_acl_access_handler, | |
413 | + [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] | |
414 | + = &ocfs2_xattr_acl_default_handler, | |
415 | +#endif | |
416 | + [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, | |
417 | +#ifdef CONFIG_OCFS2_FS_SECURITY | |
418 | + [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, | |
419 | +#endif | |
420 | +}; | |
421 | + | |
422 | +struct ocfs2_xattr_info { | |
423 | + int name_index; | |
424 | + const char *name; | |
425 | + const void *value; | |
426 | + size_t value_len; | |
427 | +}; | |
428 | + | |
429 | +struct ocfs2_xattr_search { | |
430 | + struct buffer_head *inode_bh; | |
431 | + /* | |
432 | + * xattr_bh point to the block buffer head which has extended attribute | |
433 | + * when extended attribute in inode, xattr_bh is equal to inode_bh. | |
434 | + */ | |
435 | + struct buffer_head *xattr_bh; | |
436 | + struct ocfs2_xattr_header *header; | |
437 | + void *base; | |
438 | + void *end; | |
439 | + struct ocfs2_xattr_entry *here; | |
440 | + int not_found; | |
441 | +}; | |
442 | + | |
443 | +static inline struct xattr_handler *ocfs2_xattr_handler(int name_index) | |
444 | +{ | |
445 | + struct xattr_handler *handler = NULL; | |
446 | + | |
447 | + if (name_index > 0 && name_index < OCFS2_XATTR_MAX) | |
448 | + handler = ocfs2_xattr_handler_map[name_index]; | |
449 | + | |
450 | + return handler; | |
451 | +} | |
452 | + | |
453 | +static inline u32 ocfs2_xattr_name_hash(struct inode *inode, | |
454 | + char *prefix, | |
455 | + int prefix_len, | |
456 | + char *name, | |
457 | + int name_len) | |
458 | +{ | |
459 | + /* Get hash value of uuid from super block */ | |
460 | + u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; | |
461 | + int i; | |
462 | + | |
463 | + /* hash extended attribute prefix */ | |
464 | + for (i = 0; i < prefix_len; i++) { | |
465 | + hash = (hash << OCFS2_HASH_SHIFT) ^ | |
466 | + (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
467 | + *prefix++; | |
468 | + } | |
469 | + /* hash extended attribute name */ | |
470 | + for (i = 0; i < name_len; i++) { | |
471 | + hash = (hash << OCFS2_HASH_SHIFT) ^ | |
472 | + (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ | |
473 | + *name++; | |
474 | + } | |
475 | + | |
476 | + return hash; | |
477 | +} | |
478 | + | |
479 | +/* | |
480 | + * ocfs2_xattr_hash_entry() | |
481 | + * | |
482 | + * Compute the hash of an extended attribute. | |
483 | + */ | |
484 | +static void ocfs2_xattr_hash_entry(struct inode *inode, | |
485 | + struct ocfs2_xattr_header *header, | |
486 | + struct ocfs2_xattr_entry *entry) | |
487 | +{ | |
488 | + u32 hash = 0; | |
489 | + struct xattr_handler *handler = | |
490 | + ocfs2_xattr_handler(ocfs2_xattr_get_type(entry)); | |
491 | + char *prefix = handler->prefix; | |
492 | + char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); | |
493 | + int prefix_len = strlen(handler->prefix); | |
494 | + | |
495 | + hash = ocfs2_xattr_name_hash(inode, prefix, prefix_len, name, | |
496 | + entry->xe_name_len); | |
497 | + entry->xe_name_hash = cpu_to_le32(hash); | |
498 | + | |
499 | + return; | |
500 | +} | |
501 | ||
502 | static int ocfs2_xattr_extend_allocation(struct inode *inode, | |
503 | u32 clusters_to_add, | |
504 | @@ -303,3 +442,1500 @@ static int ocfs2_xattr_value_truncate(st | |
505 | ||
506 | return ret; | |
507 | } | |
508 | + | |
509 | +static int ocfs2_xattr_list_entries(struct inode *inode, | |
510 | + struct ocfs2_xattr_header *header, | |
511 | + char *buffer, size_t buffer_size) | |
512 | +{ | |
513 | + size_t rest = buffer_size; | |
514 | + int i; | |
515 | + | |
516 | + for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { | |
517 | + struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
518 | + struct xattr_handler *handler = | |
519 | + ocfs2_xattr_handler(ocfs2_xattr_get_type(entry)); | |
520 | + | |
521 | + if (handler) { | |
522 | + size_t size = handler->list(inode, buffer, rest, | |
523 | + ((char *)header + | |
524 | + le16_to_cpu(entry->xe_name_offset)), | |
525 | + entry->xe_name_len); | |
526 | + if (buffer) { | |
527 | + if (size > rest) | |
528 | + return -ERANGE; | |
529 | + buffer += size; | |
530 | + } | |
531 | + rest -= size; | |
532 | + } | |
533 | + } | |
534 | + | |
535 | + return buffer_size - rest; | |
536 | +} | |
537 | + | |
538 | +static int ocfs2_xattr_ibody_list(struct inode *inode, | |
539 | + struct ocfs2_dinode *di, | |
540 | + char *buffer, | |
541 | + size_t buffer_size) | |
542 | +{ | |
543 | + struct ocfs2_xattr_header *header = NULL; | |
544 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
545 | + int ret = 0; | |
546 | + | |
547 | + if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
548 | + return ret; | |
549 | + | |
550 | + header = (struct ocfs2_xattr_header *) | |
551 | + ((void *)di + inode->i_sb->s_blocksize - | |
552 | + le16_to_cpu(di->i_xattr_inline_size)); | |
553 | + | |
554 | + ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
555 | + | |
556 | + return ret; | |
557 | +} | |
558 | + | |
559 | +static int ocfs2_xattr_block_list(struct inode *inode, | |
560 | + struct ocfs2_dinode *di, | |
561 | + char *buffer, | |
562 | + size_t buffer_size) | |
563 | +{ | |
564 | + struct buffer_head *blk_bh = NULL; | |
565 | + struct ocfs2_xattr_header *header = NULL; | |
566 | + int ret = 0; | |
567 | + | |
568 | + if (!di->i_xattr_loc) | |
569 | + return ret; | |
570 | + | |
571 | + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), | |
572 | + le64_to_cpu(di->i_xattr_loc), | |
573 | + &blk_bh, OCFS2_BH_CACHED, inode); | |
574 | + if (ret < 0) { | |
575 | + mlog_errno(ret); | |
576 | + return ret; | |
577 | + } | |
578 | + /*Verify the signature of xattr block*/ | |
579 | + if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
580 | + strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
581 | + ret = -EFAULT; | |
582 | + goto cleanup; | |
583 | + } | |
584 | + | |
585 | + header = &((struct ocfs2_xattr_block *)blk_bh->b_data)-> | |
586 | + xb_attrs.xb_header; | |
587 | + | |
588 | + ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); | |
589 | +cleanup: | |
590 | + brelse(blk_bh); | |
591 | + | |
592 | + return ret; | |
593 | +} | |
594 | + | |
595 | +ssize_t ocfs2_listxattr(struct dentry *dentry, | |
596 | + char *buffer, | |
597 | + size_t size) | |
598 | +{ | |
599 | + int ret = 0, i_ret = 0, b_ret = 0; | |
600 | + struct buffer_head *di_bh = NULL; | |
601 | + struct ocfs2_dinode *di = NULL; | |
602 | + struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); | |
603 | + | |
604 | + if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) | |
605 | + return ret; | |
606 | + | |
607 | + ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); | |
608 | + if (ret < 0) { | |
609 | + mlog_errno(ret); | |
610 | + return ret; | |
611 | + } | |
612 | + | |
613 | + di = (struct ocfs2_dinode *)di_bh->b_data; | |
614 | + | |
615 | + down_read(&oi->ip_xattr_sem); | |
616 | + i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); | |
617 | + if (i_ret < 0) | |
618 | + b_ret = 0; | |
619 | + else { | |
620 | + if (buffer) { | |
621 | + buffer += i_ret; | |
622 | + size -= i_ret; | |
623 | + } | |
624 | + b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, | |
625 | + buffer, size); | |
626 | + if (b_ret < 0) | |
627 | + i_ret = 0; | |
628 | + } | |
629 | + up_read(&oi->ip_xattr_sem); | |
630 | + ocfs2_inode_unlock(dentry->d_inode, 0); | |
631 | + | |
632 | + brelse(di_bh); | |
633 | + | |
634 | + return i_ret + b_ret; | |
635 | +} | |
636 | + | |
637 | +static int ocfs2_xattr_find_entry(int name_index, | |
638 | + const char *name, | |
639 | + struct ocfs2_xattr_search *xs) | |
640 | +{ | |
641 | + struct ocfs2_xattr_entry *entry; | |
642 | + size_t name_len; | |
643 | + int i, cmp = 1; | |
644 | + | |
645 | + if (name == NULL) | |
646 | + return -EINVAL; | |
647 | + | |
648 | + name_len = strlen(name); | |
649 | + entry = xs->here; | |
650 | + for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { | |
651 | + cmp = name_index - ocfs2_xattr_get_type(entry); | |
652 | + if (!cmp) | |
653 | + cmp = name_len - entry->xe_name_len; | |
654 | + if (!cmp) | |
655 | + cmp = memcmp(name, (xs->base + | |
656 | + le16_to_cpu(entry->xe_name_offset)), | |
657 | + name_len); | |
658 | + if (cmp == 0) | |
659 | + break; | |
660 | + entry += 1; | |
661 | + } | |
662 | + xs->here = entry; | |
663 | + | |
664 | + return cmp ? -ENODATA : 0; | |
665 | +} | |
666 | + | |
667 | +static int ocfs2_xattr_get_value_outside(struct inode *inode, | |
668 | + struct ocfs2_xattr_search *xs, | |
669 | + void *buffer, | |
670 | + size_t len) | |
671 | +{ | |
672 | + u32 cpos, p_cluster, num_clusters, bpc, clusters; | |
673 | + u64 blkno; | |
674 | + int i, ret = 0; | |
675 | + size_t cplen, blocksize; | |
676 | + struct buffer_head *bh = NULL; | |
677 | + struct ocfs2_xattr_value_root *xv; | |
678 | + struct ocfs2_extent_list *el; | |
679 | + | |
680 | + xv = (struct ocfs2_xattr_value_root *) | |
681 | + (xs->base + le16_to_cpu(xs->here->xe_name_offset) + | |
682 | + OCFS2_XATTR_SIZE(xs->here->xe_name_len)); | |
683 | + el = &xv->xr_list; | |
684 | + clusters = le32_to_cpu(xv->xr_clusters); | |
685 | + bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
686 | + blocksize = inode->i_sb->s_blocksize; | |
687 | + | |
688 | + cpos = 0; | |
689 | + while (cpos < clusters) { | |
690 | + ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
691 | + &num_clusters, el); | |
692 | + if (ret) { | |
693 | + mlog_errno(ret); | |
694 | + goto out; | |
695 | + } | |
696 | + | |
697 | + blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
698 | + /* Copy ocfs2_xattr_value */ | |
699 | + for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
700 | + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, | |
701 | + &bh, OCFS2_BH_CACHED, inode); | |
702 | + if (ret) { | |
703 | + mlog_errno(ret); | |
704 | + goto out; | |
705 | + } | |
706 | + | |
707 | + cplen = len >= blocksize ? blocksize : len; | |
708 | + memcpy(buffer, bh->b_data, cplen); | |
709 | + len -= cplen; | |
710 | + buffer += cplen; | |
711 | + | |
712 | + brelse(bh); | |
713 | + bh = NULL; | |
714 | + if (len == 0) | |
715 | + break; | |
716 | + } | |
717 | + cpos += num_clusters; | |
718 | + } | |
719 | +out: | |
720 | + return ret; | |
721 | +} | |
722 | + | |
723 | +static int ocfs2_xattr_ibody_get(struct inode *inode, | |
724 | + int name_index, | |
725 | + const char *name, | |
726 | + void *buffer, | |
727 | + size_t buffer_size, | |
728 | + struct ocfs2_xattr_search *xs) | |
729 | +{ | |
730 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
731 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
732 | + size_t size; | |
733 | + int ret = 0; | |
734 | + | |
735 | + if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) | |
736 | + return -ENODATA; | |
737 | + | |
738 | + xs->end = (void *)di + inode->i_sb->s_blocksize; | |
739 | + xs->header = (struct ocfs2_xattr_header *) | |
740 | + (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
741 | + xs->base = (void *)xs->header; | |
742 | + xs->here = xs->header->xh_entries; | |
743 | + | |
744 | + ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
745 | + if (ret) | |
746 | + return ret; | |
747 | + size = le64_to_cpu(xs->here->xe_value_size); | |
748 | + if (buffer) { | |
749 | + if (size > buffer_size) | |
750 | + return -ERANGE; | |
751 | + if (ocfs2_xattr_is_local(xs->here)) { | |
752 | + memcpy(buffer, (void *)xs->base + | |
753 | + le16_to_cpu(xs->here->xe_name_offset) + | |
754 | + OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
755 | + } else { | |
756 | + ret = ocfs2_xattr_get_value_outside(inode, xs, | |
757 | + buffer, size); | |
758 | + if (ret < 0) { | |
759 | + mlog_errno(ret); | |
760 | + return ret; | |
761 | + } | |
762 | + } | |
763 | + } | |
764 | + | |
765 | + return size; | |
766 | +} | |
767 | + | |
768 | +static int ocfs2_xattr_block_get(struct inode *inode, | |
769 | + int name_index, | |
770 | + const char *name, | |
771 | + void *buffer, | |
772 | + size_t buffer_size, | |
773 | + struct ocfs2_xattr_search *xs) | |
774 | +{ | |
775 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
776 | + struct buffer_head *blk_bh = NULL; | |
777 | + struct ocfs2_xattr_block *xb; | |
778 | + size_t size; | |
779 | + int ret = -ENODATA; | |
780 | + | |
781 | + if (!di->i_xattr_loc) | |
782 | + return ret; | |
783 | + | |
784 | + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), | |
785 | + le64_to_cpu(di->i_xattr_loc), | |
786 | + &blk_bh, OCFS2_BH_CACHED, inode); | |
787 | + if (ret < 0) { | |
788 | + mlog_errno(ret); | |
789 | + return ret; | |
790 | + } | |
791 | + /*Verify the signature of xattr block*/ | |
792 | + if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
793 | + strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
794 | + ret = -EFAULT; | |
795 | + goto cleanup; | |
796 | + } | |
797 | + | |
798 | + xs->xattr_bh = blk_bh; | |
799 | + xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
800 | + xs->header = &xb->xb_attrs.xb_header; | |
801 | + xs->base = (void *)xs->header; | |
802 | + xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
803 | + xs->here = xs->header->xh_entries; | |
804 | + | |
805 | + ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
806 | + if (ret) | |
807 | + goto cleanup; | |
808 | + size = le64_to_cpu(xs->here->xe_value_size); | |
809 | + if (buffer) { | |
810 | + ret = -ERANGE; | |
811 | + if (size > buffer_size) | |
812 | + goto cleanup; | |
813 | + if (ocfs2_xattr_is_local(xs->here)) { | |
814 | + memcpy(buffer, (void *)xs->base + | |
815 | + le16_to_cpu(xs->here->xe_name_offset) + | |
816 | + OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); | |
817 | + } else { | |
818 | + ret = ocfs2_xattr_get_value_outside(inode, xs, | |
819 | + buffer, size); | |
820 | + if (ret < 0) { | |
821 | + mlog_errno(ret); | |
822 | + goto cleanup; | |
823 | + } | |
824 | + } | |
825 | + } | |
826 | + ret = size; | |
827 | +cleanup: | |
828 | + brelse(blk_bh); | |
829 | + | |
830 | + return ret; | |
831 | +} | |
832 | + | |
833 | +/* ocfs2_xattr_get() | |
834 | + * | |
835 | + * Copy an extended attribute into the buffer provided. | |
836 | + * Buffer is NULL to compute the size of buffer required. | |
837 | + */ | |
838 | +int ocfs2_xattr_get(struct inode *inode, | |
839 | + int name_index, | |
840 | + const char *name, | |
841 | + void *buffer, | |
842 | + size_t buffer_size) | |
843 | +{ | |
844 | + int ret; | |
845 | + struct ocfs2_dinode *di = NULL; | |
846 | + struct buffer_head *di_bh = NULL; | |
847 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
848 | + struct ocfs2_xattr_search xis = { | |
849 | + .not_found = -ENODATA, | |
850 | + }; | |
851 | + struct ocfs2_xattr_search xbs = { | |
852 | + .not_found = -ENODATA, | |
853 | + }; | |
854 | + | |
855 | + if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) | |
856 | + ret = -ENODATA; | |
857 | + | |
858 | + ret = ocfs2_inode_lock(inode, &di_bh, 0); | |
859 | + if (ret < 0) { | |
860 | + mlog_errno(ret); | |
861 | + return ret; | |
862 | + } | |
863 | + xis.inode_bh = xbs.inode_bh = di_bh; | |
864 | + di = (struct ocfs2_dinode *)di_bh->b_data; | |
865 | + | |
866 | + down_read(&oi->ip_xattr_sem); | |
867 | + ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, | |
868 | + buffer_size, &xis); | |
869 | + if (ret == -ENODATA) | |
870 | + ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, | |
871 | + buffer_size, &xbs); | |
872 | + up_read(&oi->ip_xattr_sem); | |
873 | + ocfs2_inode_unlock(inode, 0); | |
874 | + | |
875 | + brelse(di_bh); | |
876 | + | |
877 | + return ret; | |
878 | +} | |
879 | + | |
880 | +static int __ocfs2_xattr_set_value_outside(struct inode *inode, | |
881 | + struct ocfs2_xattr_value_root *xv, | |
882 | + const void *value, | |
883 | + int value_len) | |
884 | +{ | |
885 | + int ret = 0, i, cp_len, credits; | |
886 | + u16 blocksize = inode->i_sb->s_blocksize; | |
887 | + u32 p_cluster, num_clusters; | |
888 | + u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); | |
889 | + u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); | |
890 | + u64 blkno; | |
891 | + struct buffer_head *bh = NULL; | |
892 | + handle_t *handle; | |
893 | + | |
894 | + BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); | |
895 | + | |
896 | + credits = clusters * bpc; | |
897 | + handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); | |
898 | + if (IS_ERR(handle)) { | |
899 | + ret = PTR_ERR(handle); | |
900 | + mlog_errno(ret); | |
901 | + goto out; | |
902 | + } | |
903 | + | |
904 | + while (cpos < clusters) { | |
905 | + ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, | |
906 | + &num_clusters, &xv->xr_list); | |
907 | + if (ret) { | |
908 | + mlog_errno(ret); | |
909 | + goto out_commit; | |
910 | + } | |
911 | + | |
912 | + blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); | |
913 | + | |
914 | + for (i = 0; i < num_clusters * bpc; i++, blkno++) { | |
915 | + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, | |
916 | + &bh, OCFS2_BH_CACHED, inode); | |
917 | + if (ret) { | |
918 | + mlog_errno(ret); | |
919 | + goto out_commit; | |
920 | + } | |
921 | + | |
922 | + ret = ocfs2_journal_access(handle, | |
923 | + inode, | |
924 | + bh, | |
925 | + OCFS2_JOURNAL_ACCESS_WRITE); | |
926 | + if (ret < 0) { | |
927 | + mlog_errno(ret); | |
928 | + goto out_commit; | |
929 | + } | |
930 | + | |
931 | + cp_len = value_len > blocksize ? blocksize : value_len; | |
932 | + memcpy(bh->b_data, value, cp_len); | |
933 | + value_len -= cp_len; | |
934 | + value += cp_len; | |
935 | + if (cp_len < blocksize) | |
936 | + memset(bh->b_data + cp_len, 0, | |
937 | + blocksize - cp_len); | |
938 | + | |
939 | + ret = ocfs2_journal_dirty(handle, bh); | |
940 | + if (ret < 0) { | |
941 | + mlog_errno(ret); | |
942 | + goto out_commit; | |
943 | + } | |
944 | + brelse(bh); | |
945 | + bh = NULL; | |
946 | + | |
947 | + /* | |
948 | + * XXX: do we need to empty all the following | |
949 | + * blocks in this cluster? | |
950 | + */ | |
951 | + if (!value_len) | |
952 | + break; | |
953 | + } | |
954 | + cpos += num_clusters; | |
955 | + } | |
956 | +out_commit: | |
957 | + ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
958 | +out: | |
959 | + brelse(bh); | |
960 | + | |
961 | + return ret; | |
962 | +} | |
963 | + | |
964 | +static int ocfs2_xattr_cleanup(struct inode *inode, | |
965 | + struct ocfs2_xattr_info *xi, | |
966 | + struct ocfs2_xattr_search *xs, | |
967 | + size_t offs) | |
968 | +{ | |
969 | + handle_t *handle = NULL; | |
970 | + int ret = 0; | |
971 | + size_t name_len = strlen(xi->name); | |
972 | + void *val = xs->base + offs; | |
973 | + size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
974 | + | |
975 | + handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
976 | + OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
977 | + if (IS_ERR(handle)) { | |
978 | + ret = PTR_ERR(handle); | |
979 | + mlog_errno(ret); | |
980 | + goto out; | |
981 | + } | |
982 | + ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
983 | + OCFS2_JOURNAL_ACCESS_WRITE); | |
984 | + if (ret) { | |
985 | + mlog_errno(ret); | |
986 | + goto out_commit; | |
987 | + } | |
988 | + /* Decrease xattr count */ | |
989 | + le16_add_cpu(&xs->header->xh_count, -1); | |
990 | + /* Remove the xattr entry and tree root which has already be set*/ | |
991 | + memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); | |
992 | + memset(val, 0, size); | |
993 | + | |
994 | + ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
995 | + if (ret < 0) | |
996 | + mlog_errno(ret); | |
997 | +out_commit: | |
998 | + ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
999 | +out: | |
1000 | + return ret; | |
1001 | +} | |
1002 | + | |
1003 | +static int ocfs2_xattr_update_entry(struct inode *inode, | |
1004 | + struct ocfs2_xattr_info *xi, | |
1005 | + struct ocfs2_xattr_search *xs, | |
1006 | + size_t offs) | |
1007 | +{ | |
1008 | + handle_t *handle = NULL; | |
1009 | + int ret = 0; | |
1010 | + | |
1011 | + handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1012 | + OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1013 | + if (IS_ERR(handle)) { | |
1014 | + ret = PTR_ERR(handle); | |
1015 | + mlog_errno(ret); | |
1016 | + goto out; | |
1017 | + } | |
1018 | + ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1019 | + OCFS2_JOURNAL_ACCESS_WRITE); | |
1020 | + if (ret) { | |
1021 | + mlog_errno(ret); | |
1022 | + goto out_commit; | |
1023 | + } | |
1024 | + | |
1025 | + xs->here->xe_name_offset = cpu_to_le16(offs); | |
1026 | + xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1027 | + if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) | |
1028 | + ocfs2_xattr_set_local(xs->here, 1); | |
1029 | + else | |
1030 | + ocfs2_xattr_set_local(xs->here, 0); | |
1031 | + ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1032 | + | |
1033 | + ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1034 | + if (ret < 0) | |
1035 | + mlog_errno(ret); | |
1036 | +out_commit: | |
1037 | + ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1038 | +out: | |
1039 | + return ret; | |
1040 | +} | |
1041 | + | |
1042 | +/* | |
1043 | + * ocfs2_xattr_set_value_outside() | |
1044 | + * | |
1045 | + * Set large size value in B tree. | |
1046 | + */ | |
1047 | +static int ocfs2_xattr_set_value_outside(struct inode *inode, | |
1048 | + struct ocfs2_xattr_info *xi, | |
1049 | + struct ocfs2_xattr_search *xs, | |
1050 | + size_t offs) | |
1051 | +{ | |
1052 | + size_t name_len = strlen(xi->name); | |
1053 | + void *val = xs->base + offs; | |
1054 | + struct ocfs2_xattr_value_root *xv = NULL; | |
1055 | + size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1056 | + int ret = 0; | |
1057 | + | |
1058 | + memset(val, 0, size); | |
1059 | + memcpy(val, xi->name, name_len); | |
1060 | + xv = (struct ocfs2_xattr_value_root *) | |
1061 | + (val + OCFS2_XATTR_SIZE(name_len)); | |
1062 | + xv->xr_clusters = 0; | |
1063 | + xv->xr_last_eb_blk = 0; | |
1064 | + xv->xr_list.l_tree_depth = 0; | |
1065 | + xv->xr_list.l_count = cpu_to_le16(1); | |
1066 | + xv->xr_list.l_next_free_rec = 0; | |
1067 | + | |
1068 | + ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, | |
1069 | + xi->value_len); | |
1070 | + if (ret < 0) { | |
1071 | + mlog_errno(ret); | |
1072 | + return ret; | |
1073 | + } | |
1074 | + ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, | |
1075 | + xi->value_len); | |
1076 | + if (ret < 0) { | |
1077 | + mlog_errno(ret); | |
1078 | + return ret; | |
1079 | + } | |
1080 | + ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); | |
1081 | + if (ret < 0) | |
1082 | + mlog_errno(ret); | |
1083 | + | |
1084 | + return ret; | |
1085 | +} | |
1086 | + | |
1087 | +/* | |
1088 | + * ocfs2_xattr_set_entry_local() | |
1089 | + * | |
1090 | + * Set, replace or remove extended attribute in local. | |
1091 | + */ | |
1092 | +static void ocfs2_xattr_set_entry_local(struct inode *inode, | |
1093 | + struct ocfs2_xattr_info *xi, | |
1094 | + struct ocfs2_xattr_search *xs, | |
1095 | + struct ocfs2_xattr_entry *last, | |
1096 | + size_t min_offs) | |
1097 | +{ | |
1098 | + size_t name_len = strlen(xi->name); | |
1099 | + int i; | |
1100 | + | |
1101 | + if (xi->value && xs->not_found) { | |
1102 | + /* Insert the new xattr entry. */ | |
1103 | + le16_add_cpu(&xs->header->xh_count, 1); | |
1104 | + ocfs2_xattr_set_type(last, xi->name_index); | |
1105 | + ocfs2_xattr_set_local(last, 1); | |
1106 | + last->xe_name_len = name_len; | |
1107 | + } else { | |
1108 | + void *first_val; | |
1109 | + void *val; | |
1110 | + size_t offs, size; | |
1111 | + | |
1112 | + first_val = xs->base + min_offs; | |
1113 | + offs = le16_to_cpu(xs->here->xe_name_offset); | |
1114 | + val = xs->base + offs; | |
1115 | + | |
1116 | + if (le64_to_cpu(xs->here->xe_value_size) > | |
1117 | + OCFS2_XATTR_INLINE_SIZE) | |
1118 | + size = OCFS2_XATTR_SIZE(name_len) + | |
1119 | + OCFS2_XATTR_ROOT_SIZE; | |
1120 | + else | |
1121 | + size = OCFS2_XATTR_SIZE(name_len) + | |
1122 | + OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1123 | + | |
1124 | + if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + | |
1125 | + OCFS2_XATTR_SIZE(xi->value_len)) { | |
1126 | + /* The old and the new value have the | |
1127 | + same size. Just replace the value. */ | |
1128 | + ocfs2_xattr_set_local(xs->here, 1); | |
1129 | + xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1130 | + /* Clear value bytes. */ | |
1131 | + memset(val + OCFS2_XATTR_SIZE(name_len), | |
1132 | + 0, | |
1133 | + OCFS2_XATTR_SIZE(xi->value_len)); | |
1134 | + memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1135 | + xi->value, | |
1136 | + xi->value_len); | |
1137 | + return; | |
1138 | + } | |
1139 | + /* Remove the old name+value. */ | |
1140 | + memmove(first_val + size, first_val, val - first_val); | |
1141 | + memset(first_val, 0, size); | |
1142 | + xs->here->xe_name_hash = 0; | |
1143 | + xs->here->xe_name_offset = 0; | |
1144 | + ocfs2_xattr_set_local(xs->here, 1); | |
1145 | + xs->here->xe_value_size = 0; | |
1146 | + | |
1147 | + min_offs += size; | |
1148 | + | |
1149 | + /* Adjust all value offsets. */ | |
1150 | + last = xs->header->xh_entries; | |
1151 | + for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1152 | + size_t o = le16_to_cpu(last->xe_name_offset); | |
1153 | + | |
1154 | + if (o < offs) | |
1155 | + last->xe_name_offset = cpu_to_le16(o + size); | |
1156 | + last += 1; | |
1157 | + } | |
1158 | + | |
1159 | + if (!xi->value) { | |
1160 | + /* Remove the old entry. */ | |
1161 | + last -= 1; | |
1162 | + memmove(xs->here, xs->here + 1, | |
1163 | + (void *)last - (void *)xs->here); | |
1164 | + memset(last, 0, sizeof(struct ocfs2_xattr_entry)); | |
1165 | + le16_add_cpu(&xs->header->xh_count, -1); | |
1166 | + } | |
1167 | + } | |
1168 | + if (xi->value) { | |
1169 | + /* Insert the new name+value. */ | |
1170 | + size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1171 | + OCFS2_XATTR_SIZE(xi->value_len); | |
1172 | + void *val = xs->base + min_offs - size; | |
1173 | + | |
1174 | + xs->here->xe_name_offset = cpu_to_le16(min_offs - size); | |
1175 | + memset(val, 0, size); | |
1176 | + memcpy(val, xi->name, name_len); | |
1177 | + memcpy(val + OCFS2_XATTR_SIZE(name_len), | |
1178 | + xi->value, | |
1179 | + xi->value_len); | |
1180 | + xs->here->xe_value_size = cpu_to_le64(xi->value_len); | |
1181 | + ocfs2_xattr_set_local(xs->here, 1); | |
1182 | + ocfs2_xattr_hash_entry(inode, xs->header, xs->here); | |
1183 | + } | |
1184 | + | |
1185 | + return; | |
1186 | +} | |
1187 | + | |
1188 | +/* | |
1189 | + * ocfs2_xattr_set_entry() | |
1190 | + * | |
1191 | + * Set extended attribute entry into inode or block. | |
1192 | + * | |
1193 | + * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, | |
1194 | + * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), | |
1195 | + * then set value in B tree with set_value_outside(). | |
1196 | + */ | |
1197 | +static int ocfs2_xattr_set_entry(struct inode *inode, | |
1198 | + struct ocfs2_xattr_info *xi, | |
1199 | + struct ocfs2_xattr_search *xs, | |
1200 | + int flag) | |
1201 | +{ | |
1202 | + struct ocfs2_xattr_entry *last; | |
1203 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1204 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1205 | + size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); | |
1206 | + size_t size_l = 0; | |
1207 | + handle_t *handle = NULL; | |
1208 | + int free, i, ret; | |
1209 | + struct ocfs2_xattr_info xi_l = { | |
1210 | + .name_index = xi->name_index, | |
1211 | + .name = xi->name, | |
1212 | + .value = xi->value, | |
1213 | + .value_len = xi->value_len, | |
1214 | + }; | |
1215 | + | |
1216 | + /* Compute min_offs, last and free space. */ | |
1217 | + last = xs->header->xh_entries; | |
1218 | + | |
1219 | + for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { | |
1220 | + size_t offs = le16_to_cpu(last->xe_name_offset); | |
1221 | + if (offs < min_offs) | |
1222 | + min_offs = offs; | |
1223 | + last += 1; | |
1224 | + } | |
1225 | + | |
1226 | + free = min_offs - ((void *)last - xs->base) - sizeof(__u32); | |
1227 | + if (free < 0) | |
1228 | + return -EFAULT; | |
1229 | + | |
1230 | + if (!xs->not_found) { | |
1231 | + size_t size = 0; | |
1232 | + if (ocfs2_xattr_is_local(xs->here)) | |
1233 | + size = OCFS2_XATTR_SIZE(name_len) + | |
1234 | + OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1235 | + else | |
1236 | + size = OCFS2_XATTR_SIZE(name_len) + | |
1237 | + OCFS2_XATTR_ROOT_SIZE; | |
1238 | + free += (size + sizeof(struct ocfs2_xattr_entry)); | |
1239 | + } | |
1240 | + /* Check free space in inode or block */ | |
1241 | + if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1242 | + if (free < sizeof(struct ocfs2_xattr_entry) + | |
1243 | + OCFS2_XATTR_SIZE(name_len) + | |
1244 | + OCFS2_XATTR_ROOT_SIZE) { | |
1245 | + ret = -ENOSPC; | |
1246 | + goto out; | |
1247 | + } | |
1248 | + size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; | |
1249 | + xi_l.value = (void *)&def_xv; | |
1250 | + xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; | |
1251 | + } else if (xi->value) { | |
1252 | + if (free < sizeof(struct ocfs2_xattr_entry) + | |
1253 | + OCFS2_XATTR_SIZE(name_len) + | |
1254 | + OCFS2_XATTR_SIZE(xi->value_len)) { | |
1255 | + ret = -ENOSPC; | |
1256 | + goto out; | |
1257 | + } | |
1258 | + } | |
1259 | + | |
1260 | + if (!xs->not_found) { | |
1261 | + /* For existing extended attribute */ | |
1262 | + size_t size = OCFS2_XATTR_SIZE(name_len) + | |
1263 | + OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); | |
1264 | + size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1265 | + void *val = xs->base + offs; | |
1266 | + | |
1267 | + if (ocfs2_xattr_is_local(xs->here) && size == size_l) { | |
1268 | + /* Replace existing local xattr with tree root */ | |
1269 | + ret = ocfs2_xattr_set_value_outside(inode, xi, xs, | |
1270 | + offs); | |
1271 | + if (ret < 0) | |
1272 | + mlog_errno(ret); | |
1273 | + goto out; | |
1274 | + } else if (!ocfs2_xattr_is_local(xs->here)) { | |
1275 | + /* For existing xattr which has value outside */ | |
1276 | + struct ocfs2_xattr_value_root *xv = NULL; | |
1277 | + xv = (struct ocfs2_xattr_value_root *)(val + | |
1278 | + OCFS2_XATTR_SIZE(name_len)); | |
1279 | + | |
1280 | + if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1281 | + /* | |
1282 | + * If new value need set outside also, | |
1283 | + * first truncate old value to new value, | |
1284 | + * then set new value with set_value_outside(). | |
1285 | + */ | |
1286 | + ret = ocfs2_xattr_value_truncate(inode, | |
1287 | + xs->xattr_bh, | |
1288 | + xv, | |
1289 | + xi->value_len); | |
1290 | + if (ret < 0) { | |
1291 | + mlog_errno(ret); | |
1292 | + goto out; | |
1293 | + } | |
1294 | + | |
1295 | + ret = __ocfs2_xattr_set_value_outside(inode, | |
1296 | + xv, | |
1297 | + xi->value, | |
1298 | + xi->value_len); | |
1299 | + if (ret < 0) { | |
1300 | + mlog_errno(ret); | |
1301 | + goto out; | |
1302 | + } | |
1303 | + | |
1304 | + ret = ocfs2_xattr_update_entry(inode, | |
1305 | + xi, | |
1306 | + xs, | |
1307 | + offs); | |
1308 | + if (ret < 0) | |
1309 | + mlog_errno(ret); | |
1310 | + goto out; | |
1311 | + } else { | |
1312 | + /* | |
1313 | + * If new value need set in local, | |
1314 | + * just trucate old value to zero. | |
1315 | + */ | |
1316 | + ret = ocfs2_xattr_value_truncate(inode, | |
1317 | + xs->xattr_bh, | |
1318 | + xv, | |
1319 | + 0); | |
1320 | + if (ret < 0) | |
1321 | + mlog_errno(ret); | |
1322 | + } | |
1323 | + } | |
1324 | + } | |
1325 | + | |
1326 | + handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1327 | + OCFS2_INODE_UPDATE_CREDITS); | |
1328 | + if (IS_ERR(handle)) { | |
1329 | + ret = PTR_ERR(handle); | |
1330 | + mlog_errno(ret); | |
1331 | + goto out; | |
1332 | + } | |
1333 | + | |
1334 | + ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1335 | + OCFS2_JOURNAL_ACCESS_WRITE); | |
1336 | + if (ret) { | |
1337 | + mlog_errno(ret); | |
1338 | + goto out_commit; | |
1339 | + } | |
1340 | + | |
1341 | + if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1342 | + /*set extended attribue in external blcok*/ | |
1343 | + ret = ocfs2_extend_trans(handle, | |
1344 | + OCFS2_XATTR_BLOCK_UPDATE_CREDITS); | |
1345 | + if (ret) { | |
1346 | + mlog_errno(ret); | |
1347 | + goto out_commit; | |
1348 | + } | |
1349 | + ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, | |
1350 | + OCFS2_JOURNAL_ACCESS_WRITE); | |
1351 | + if (ret) { | |
1352 | + mlog_errno(ret); | |
1353 | + goto out_commit; | |
1354 | + } | |
1355 | + } | |
1356 | + | |
1357 | + /* | |
1358 | + * Set value in local, include set tree root in local. | |
1359 | + * This is the first step for value size >INLINE_SIZE. | |
1360 | + */ | |
1361 | + ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); | |
1362 | + | |
1363 | + if (!(flag & OCFS2_INLINE_XATTR_FL)) { | |
1364 | + ret = ocfs2_journal_dirty(handle, xs->xattr_bh); | |
1365 | + if (ret < 0) { | |
1366 | + mlog_errno(ret); | |
1367 | + goto out_commit; | |
1368 | + } | |
1369 | + } | |
1370 | + | |
1371 | + if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && | |
1372 | + (flag & OCFS2_INLINE_XATTR_FL)) { | |
1373 | + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1374 | + unsigned int xattrsize = osb->s_xattr_inline_size; | |
1375 | + | |
1376 | + /* | |
1377 | + * Adjust extent record count or inline data size | |
1378 | + * to reserve space for extended attribute. | |
1379 | + */ | |
1380 | + if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1381 | + struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1382 | + le16_add_cpu(&idata->id_count, -xattrsize); | |
1383 | + } else if (!(ocfs2_inode_is_fast_symlink(inode))) { | |
1384 | + struct ocfs2_extent_list *el = &di->id2.i_list; | |
1385 | + le16_add_cpu(&el->l_count, -(xattrsize / | |
1386 | + sizeof(struct ocfs2_extent_rec))); | |
1387 | + } | |
1388 | + di->i_xattr_inline_size = cpu_to_le16(xattrsize); | |
1389 | + } | |
1390 | + /* Update xattr flag */ | |
1391 | + spin_lock(&oi->ip_lock); | |
1392 | + oi->ip_dyn_features |= flag; | |
1393 | + di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1394 | + spin_unlock(&oi->ip_lock); | |
1395 | + /* Update inode ctime */ | |
1396 | + inode->i_ctime = CURRENT_TIME; | |
1397 | + di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); | |
1398 | + di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
1399 | + | |
1400 | + ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1401 | + if (ret < 0) | |
1402 | + mlog_errno(ret); | |
1403 | + | |
1404 | +out_commit: | |
1405 | + ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1406 | + | |
1407 | + if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { | |
1408 | + /* | |
1409 | + * Set value outside in B tree. | |
1410 | + * This is the second step for value size > INLINE_SIZE. | |
1411 | + */ | |
1412 | + size_t offs = le16_to_cpu(xs->here->xe_name_offset); | |
1413 | + ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs); | |
1414 | + if (ret < 0) { | |
1415 | + int ret2; | |
1416 | + | |
1417 | + mlog_errno(ret); | |
1418 | + /* | |
1419 | + * If set value outside failed, we have to clean | |
1420 | + * the junk tree root we have already set in local. | |
1421 | + */ | |
1422 | + ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs); | |
1423 | + if (ret2 < 0) | |
1424 | + mlog_errno(ret2); | |
1425 | + } | |
1426 | + } | |
1427 | +out: | |
1428 | + return ret; | |
1429 | + | |
1430 | +} | |
1431 | + | |
1432 | +static int ocfs2_xattr_free_block(handle_t *handle, | |
1433 | + struct ocfs2_super *osb, | |
1434 | + struct ocfs2_xattr_block *xb) | |
1435 | +{ | |
1436 | + struct inode *xb_alloc_inode; | |
1437 | + struct buffer_head *xb_alloc_bh = NULL; | |
1438 | + u64 blk = le64_to_cpu(xb->xb_blkno); | |
1439 | + u16 bit = le16_to_cpu(xb->xb_suballoc_bit); | |
1440 | + u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); | |
1441 | + int ret = 0; | |
1442 | + | |
1443 | + xb_alloc_inode = ocfs2_get_system_file_inode(osb, | |
1444 | + EXTENT_ALLOC_SYSTEM_INODE, | |
1445 | + le16_to_cpu(xb->xb_suballoc_slot)); | |
1446 | + if (!xb_alloc_inode) { | |
1447 | + ret = -ENOMEM; | |
1448 | + mlog_errno(ret); | |
1449 | + goto out; | |
1450 | + } | |
1451 | + mutex_lock(&xb_alloc_inode->i_mutex); | |
1452 | + | |
1453 | + ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); | |
1454 | + if (ret < 0) { | |
1455 | + mlog_errno(ret); | |
1456 | + goto out_mutex; | |
1457 | + } | |
1458 | + ret = ocfs2_extend_trans(handle, OCFS2_SUBALLOC_FREE); | |
1459 | + if (ret < 0) { | |
1460 | + mlog_errno(ret); | |
1461 | + goto out_unlock; | |
1462 | + } | |
1463 | + ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, | |
1464 | + bit, bg_blkno, 1); | |
1465 | + if (ret < 0) | |
1466 | + mlog_errno(ret); | |
1467 | +out_unlock: | |
1468 | + ocfs2_inode_unlock(xb_alloc_inode, 1); | |
1469 | + brelse(xb_alloc_bh); | |
1470 | +out_mutex: | |
1471 | + mutex_unlock(&xb_alloc_inode->i_mutex); | |
1472 | + iput(xb_alloc_inode); | |
1473 | +out: | |
1474 | + return ret; | |
1475 | +} | |
1476 | + | |
1477 | +static int ocfs2_remove_value_outside(struct inode*inode, | |
1478 | + struct buffer_head *bh, | |
1479 | + struct ocfs2_xattr_header *header) | |
1480 | +{ | |
1481 | + int ret = 0, i; | |
1482 | + | |
1483 | + for (i = 0; i < le16_to_cpu(header->xh_count); i++) { | |
1484 | + struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; | |
1485 | + | |
1486 | + if (!ocfs2_xattr_is_local(entry)) { | |
1487 | + struct ocfs2_xattr_value_root *xv; | |
1488 | + void *val; | |
1489 | + | |
1490 | + val = (void *)header + | |
1491 | + le16_to_cpu(entry->xe_name_offset); | |
1492 | + xv = (struct ocfs2_xattr_value_root *) | |
1493 | + (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); | |
1494 | + ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0); | |
1495 | + if (ret < 0) { | |
1496 | + mlog_errno(ret); | |
1497 | + return ret; | |
1498 | + } | |
1499 | + } | |
1500 | + } | |
1501 | + | |
1502 | + return ret; | |
1503 | +} | |
1504 | + | |
1505 | +static int ocfs2_xattr_ibody_remove(struct inode *inode, | |
1506 | + struct buffer_head *di_bh) | |
1507 | +{ | |
1508 | + | |
1509 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1510 | + struct ocfs2_xattr_header *header; | |
1511 | + int ret; | |
1512 | + | |
1513 | + header = (struct ocfs2_xattr_header *) | |
1514 | + ((void *)di + inode->i_sb->s_blocksize - | |
1515 | + le16_to_cpu(di->i_xattr_inline_size)); | |
1516 | + | |
1517 | + ret = ocfs2_remove_value_outside(inode, di_bh, header); | |
1518 | + | |
1519 | + return ret; | |
1520 | +} | |
1521 | + | |
1522 | +static int ocfs2_xattr_block_remove(struct inode *inode, | |
1523 | + struct buffer_head *blk_bh) | |
1524 | +{ | |
1525 | + struct ocfs2_xattr_block *xb; | |
1526 | + struct ocfs2_xattr_header *header; | |
1527 | + int ret = 0; | |
1528 | + | |
1529 | + xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1530 | + header = &(xb->xb_attrs.xb_header); | |
1531 | + | |
1532 | + ret = ocfs2_remove_value_outside(inode, blk_bh, header); | |
1533 | + | |
1534 | + return ret; | |
1535 | +} | |
1536 | + | |
1537 | +/* | |
1538 | + * ocfs2_xattr_remove() | |
1539 | + * | |
1540 | + * Free extended attribute resources associated with this inode. | |
1541 | + */ | |
1542 | +int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) | |
1543 | +{ | |
1544 | + struct ocfs2_xattr_block *xb; | |
1545 | + struct buffer_head *blk_bh = NULL; | |
1546 | + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1547 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1548 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
1549 | + handle_t *handle; | |
1550 | + int ret; | |
1551 | + | |
1552 | + if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) | |
1553 | + return 0; | |
1554 | + | |
1555 | + if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1556 | + ret = ocfs2_xattr_ibody_remove(inode, di_bh); | |
1557 | + if (ret < 0) { | |
1558 | + mlog_errno(ret); | |
1559 | + goto out; | |
1560 | + } | |
1561 | + } | |
1562 | + if (di->i_xattr_loc) { | |
1563 | + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), | |
1564 | + le64_to_cpu(di->i_xattr_loc), | |
1565 | + &blk_bh, OCFS2_BH_CACHED, inode); | |
1566 | + if (ret < 0) { | |
1567 | + mlog_errno(ret); | |
1568 | + return ret; | |
1569 | + } | |
1570 | + /*Verify the signature of xattr block*/ | |
1571 | + if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
1572 | + strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
1573 | + ret = -EFAULT; | |
1574 | + goto out; | |
1575 | + } | |
1576 | + | |
1577 | + ret = ocfs2_xattr_block_remove(inode, blk_bh); | |
1578 | + if (ret < 0) { | |
1579 | + mlog_errno(ret); | |
1580 | + goto out; | |
1581 | + } | |
1582 | + } | |
1583 | + | |
1584 | + handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), | |
1585 | + OCFS2_INODE_UPDATE_CREDITS); | |
1586 | + if (IS_ERR(handle)) { | |
1587 | + ret = PTR_ERR(handle); | |
1588 | + mlog_errno(ret); | |
1589 | + goto out; | |
1590 | + } | |
1591 | + ret = ocfs2_journal_access(handle, inode, di_bh, | |
1592 | + OCFS2_JOURNAL_ACCESS_WRITE); | |
1593 | + if (ret) { | |
1594 | + mlog_errno(ret); | |
1595 | + goto out_commit; | |
1596 | + } | |
1597 | + | |
1598 | + if (di->i_xattr_loc) { | |
1599 | + xb = (struct ocfs2_xattr_block *)blk_bh->b_data; | |
1600 | + ocfs2_xattr_free_block(handle, osb, xb); | |
1601 | + di->i_xattr_loc = cpu_to_le64(0); | |
1602 | + } | |
1603 | + | |
1604 | + spin_lock(&oi->ip_lock); | |
1605 | + oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); | |
1606 | + di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); | |
1607 | + spin_unlock(&oi->ip_lock); | |
1608 | + | |
1609 | + ret = ocfs2_journal_dirty(handle, di_bh); | |
1610 | + if (ret < 0) | |
1611 | + mlog_errno(ret); | |
1612 | +out_commit: | |
1613 | + ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); | |
1614 | +out: | |
1615 | + brelse(blk_bh); | |
1616 | + | |
1617 | + return ret; | |
1618 | +} | |
1619 | + | |
1620 | +static int ocfs2_xattr_has_space_inline(struct inode *inode, | |
1621 | + struct ocfs2_dinode *di) | |
1622 | +{ | |
1623 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1624 | + unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; | |
1625 | + int free; | |
1626 | + | |
1627 | + if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) | |
1628 | + return 0; | |
1629 | + | |
1630 | + if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { | |
1631 | + struct ocfs2_inline_data *idata = &di->id2.i_data; | |
1632 | + free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); | |
1633 | + } else if (ocfs2_inode_is_fast_symlink(inode)) { | |
1634 | + free = ocfs2_fast_symlink_chars(inode->i_sb) - | |
1635 | + le64_to_cpu(di->i_size); | |
1636 | + } else { | |
1637 | + struct ocfs2_extent_list *el = &di->id2.i_list; | |
1638 | + free = (le16_to_cpu(el->l_count) - | |
1639 | + le16_to_cpu(el->l_next_free_rec)) * | |
1640 | + sizeof(struct ocfs2_extent_rec); | |
1641 | + } | |
1642 | + if (free >= xattrsize) | |
1643 | + return 1; | |
1644 | + | |
1645 | + return 0; | |
1646 | +} | |
1647 | + | |
1648 | +/* | |
1649 | + * ocfs2_xattr_ibody_find() | |
1650 | + * | |
1651 | + * Find extended attribute in inode block and | |
1652 | + * fill search info into struct ocfs2_xattr_search. | |
1653 | + */ | |
1654 | +static int ocfs2_xattr_ibody_find(struct inode *inode, | |
1655 | + int name_index, | |
1656 | + const char *name, | |
1657 | + struct ocfs2_xattr_search *xs) | |
1658 | +{ | |
1659 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1660 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1661 | + int ret; | |
1662 | + int has_space = 0; | |
1663 | + | |
1664 | + if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1665 | + return 0; | |
1666 | + | |
1667 | + if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1668 | + down_read(&oi->ip_alloc_sem); | |
1669 | + has_space = ocfs2_xattr_has_space_inline(inode, di); | |
1670 | + up_read(&oi->ip_alloc_sem); | |
1671 | + if (!has_space) | |
1672 | + return 0; | |
1673 | + } | |
1674 | + | |
1675 | + xs->xattr_bh = xs->inode_bh; | |
1676 | + xs->end = (void *)di + inode->i_sb->s_blocksize; | |
1677 | + if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) | |
1678 | + xs->header = (struct ocfs2_xattr_header *) | |
1679 | + (xs->end - le16_to_cpu(di->i_xattr_inline_size)); | |
1680 | + else | |
1681 | + xs->header = (struct ocfs2_xattr_header *) | |
1682 | + (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); | |
1683 | + xs->base = (void *)xs->header; | |
1684 | + xs->here = xs->header->xh_entries; | |
1685 | + | |
1686 | + /* Find the named attribute. */ | |
1687 | + if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { | |
1688 | + ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1689 | + if (ret && ret != -ENODATA) | |
1690 | + return ret; | |
1691 | + xs->not_found = ret; | |
1692 | + } | |
1693 | + | |
1694 | + return 0; | |
1695 | +} | |
1696 | + | |
1697 | +/* | |
1698 | + * ocfs2_xattr_ibody_set() | |
1699 | + * | |
1700 | + * Set, replace or remove an extended attribute into inode block. | |
1701 | + * | |
1702 | + */ | |
1703 | +static int ocfs2_xattr_ibody_set(struct inode *inode, | |
1704 | + struct ocfs2_xattr_info *xi, | |
1705 | + struct ocfs2_xattr_search *xs) | |
1706 | +{ | |
1707 | + struct ocfs2_inode_info *oi = OCFS2_I(inode); | |
1708 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1709 | + int ret; | |
1710 | + | |
1711 | + if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) | |
1712 | + return -ENOSPC; | |
1713 | + | |
1714 | + down_write(&oi->ip_alloc_sem); | |
1715 | + if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { | |
1716 | + if (!ocfs2_xattr_has_space_inline(inode, di)) { | |
1717 | + ret = -ENOSPC; | |
1718 | + goto out; | |
1719 | + } | |
1720 | + } | |
1721 | + | |
1722 | + ret = ocfs2_xattr_set_entry(inode, xi, xs, | |
1723 | + (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); | |
1724 | +out: | |
1725 | + up_write(&oi->ip_alloc_sem); | |
1726 | + | |
1727 | + return ret; | |
1728 | +} | |
1729 | + | |
1730 | +/* | |
1731 | + * ocfs2_xattr_block_find() | |
1732 | + * | |
1733 | + * Find extended attribute in external block and | |
1734 | + * fill search info into struct ocfs2_xattr_search. | |
1735 | + */ | |
1736 | +static int ocfs2_xattr_block_find(struct inode *inode, | |
1737 | + int name_index, | |
1738 | + const char *name, | |
1739 | + struct ocfs2_xattr_search *xs) | |
1740 | +{ | |
1741 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1742 | + struct buffer_head *blk_bh = NULL; | |
1743 | + int ret = 0; | |
1744 | + | |
1745 | + if (!di->i_xattr_loc) | |
1746 | + return ret; | |
1747 | + | |
1748 | + ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), | |
1749 | + le64_to_cpu(di->i_xattr_loc), | |
1750 | + &blk_bh, OCFS2_BH_CACHED, inode); | |
1751 | + if (ret < 0) { | |
1752 | + mlog_errno(ret); | |
1753 | + return ret; | |
1754 | + } | |
1755 | + /*Verify the signature of xattr block*/ | |
1756 | + if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, | |
1757 | + strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { | |
1758 | + ret = -EFAULT; | |
1759 | + goto cleanup; | |
1760 | + } | |
1761 | + | |
1762 | + xs->xattr_bh = blk_bh; | |
1763 | + xs->header = &((struct ocfs2_xattr_block *)blk_bh->b_data)-> | |
1764 | + xb_attrs.xb_header; | |
1765 | + xs->base = (void *)xs->header; | |
1766 | + xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; | |
1767 | + xs->here = xs->header->xh_entries; | |
1768 | + | |
1769 | + ret = ocfs2_xattr_find_entry(name_index, name, xs); | |
1770 | + if (ret && ret != -ENODATA) { | |
1771 | + xs->xattr_bh = NULL; | |
1772 | + goto cleanup; | |
1773 | + } | |
1774 | + xs->not_found = ret; | |
1775 | + return 0; | |
1776 | + | |
1777 | +cleanup: | |
1778 | + brelse(blk_bh); | |
1779 | + | |
1780 | + return ret; | |
1781 | +} | |
1782 | + | |
1783 | +/* | |
1784 | + * ocfs2_xattr_block_set() | |
1785 | + * | |
1786 | + * Set, replace or remove an extended attribute into external block. | |
1787 | + * | |
1788 | + */ | |
1789 | +static int ocfs2_xattr_block_set(struct inode *inode, | |
1790 | + struct ocfs2_xattr_info *xi, | |
1791 | + struct ocfs2_xattr_search *xs) | |
1792 | +{ | |
1793 | + struct buffer_head *new_bh = NULL; | |
1794 | + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1795 | + struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; | |
1796 | + struct ocfs2_alloc_context *meta_ac = NULL; | |
1797 | + handle_t *handle = NULL; | |
1798 | + struct ocfs2_xattr_block *xblk = NULL; | |
1799 | + u16 suballoc_bit_start; | |
1800 | + u32 num_got; | |
1801 | + u64 first_blkno; | |
1802 | + int ret; | |
1803 | + | |
1804 | + if (!xs->xattr_bh) { | |
1805 | + /* | |
1806 | + * Alloc one external block for extended attribute | |
1807 | + * outside of inode. | |
1808 | + */ | |
1809 | + ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); | |
1810 | + if (ret < 0) { | |
1811 | + mlog_errno(ret); | |
1812 | + goto out; | |
1813 | + } | |
1814 | + handle = ocfs2_start_trans(osb, | |
1815 | + OCFS2_XATTR_BLOCK_CREATE_CREDITS); | |
1816 | + if (IS_ERR(handle)) { | |
1817 | + ret = PTR_ERR(handle); | |
1818 | + mlog_errno(ret); | |
1819 | + goto out; | |
1820 | + } | |
1821 | + ret = ocfs2_journal_access(handle, inode, xs->inode_bh, | |
1822 | + OCFS2_JOURNAL_ACCESS_CREATE); | |
1823 | + if (ret < 0) { | |
1824 | + mlog_errno(ret); | |
1825 | + goto out_commit; | |
1826 | + } | |
1827 | + | |
1828 | + ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, | |
1829 | + &suballoc_bit_start, &num_got, | |
1830 | + &first_blkno); | |
1831 | + if (ret < 0) { | |
1832 | + mlog_errno(ret); | |
1833 | + goto out_commit; | |
1834 | + } | |
1835 | + | |
1836 | + new_bh = sb_getblk(inode->i_sb, first_blkno); | |
1837 | + ocfs2_set_new_buffer_uptodate(inode, new_bh); | |
1838 | + | |
1839 | + ret = ocfs2_journal_access(handle, inode, new_bh, | |
1840 | + OCFS2_JOURNAL_ACCESS_CREATE); | |
1841 | + if (ret < 0) { | |
1842 | + mlog_errno(ret); | |
1843 | + goto out_commit; | |
1844 | + } | |
1845 | + | |
1846 | + /* Initialize ocfs2_xattr_block */ | |
1847 | + xs->xattr_bh = new_bh; | |
1848 | + xblk = (struct ocfs2_xattr_block *)new_bh->b_data; | |
1849 | + memset(xblk, 0, inode->i_sb->s_blocksize); | |
1850 | + strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); | |
1851 | + xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); | |
1852 | + xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); | |
1853 | + xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); | |
1854 | + xblk->xb_blkno = cpu_to_le64(first_blkno); | |
1855 | + | |
1856 | + xs->header = &xblk->xb_attrs.xb_header; | |
1857 | + xs->base = (void *)xs->header; | |
1858 | + xs->end = (void *)xblk + inode->i_sb->s_blocksize; | |
1859 | + xs->here = xs->header->xh_entries; | |
1860 | + | |
1861 | + | |
1862 | + ret = ocfs2_journal_dirty(handle, new_bh); | |
1863 | + if (ret < 0) { | |
1864 | + mlog_errno(ret); | |
1865 | + goto out_commit; | |
1866 | + } | |
1867 | + di->i_xattr_loc = cpu_to_le64(first_blkno); | |
1868 | + ret = ocfs2_journal_dirty(handle, xs->inode_bh); | |
1869 | + if (ret < 0) | |
1870 | + mlog_errno(ret); | |
1871 | +out_commit: | |
1872 | + ocfs2_commit_trans(osb, handle); | |
1873 | +out: | |
1874 | + if (meta_ac) | |
1875 | + ocfs2_free_alloc_context(meta_ac); | |
1876 | + if (ret < 0) | |
1877 | + return ret; | |
1878 | + } | |
1879 | + | |
1880 | + /* Set extended attribute into external block */ | |
1881 | + ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL); | |
1882 | + | |
1883 | + return ret; | |
1884 | +} | |
1885 | + | |
1886 | +/* | |
1887 | + * ocfs2_xattr_set() | |
1888 | + * | |
1889 | + * Set, replace or remove an extended attribute for this inode. | |
1890 | + * value is NULL to remove an existing extended attribute, else either | |
1891 | + * create or replace an extended attribute. | |
1892 | + */ | |
1893 | +int ocfs2_xattr_set(struct inode *inode, | |
1894 | + int name_index, | |
1895 | + const char *name, | |
1896 | + const void *value, | |
1897 | + size_t value_len, | |
1898 | + int flags) | |
1899 | +{ | |
1900 | + struct buffer_head *di_bh = NULL; | |
1901 | + struct ocfs2_dinode *di; | |
1902 | + int ret; | |
1903 | + | |
1904 | + struct ocfs2_xattr_info xi = { | |
1905 | + .name_index = name_index, | |
1906 | + .name = name, | |
1907 | + .value = value, | |
1908 | + .value_len = value_len, | |
1909 | + }; | |
1910 | + | |
1911 | + struct ocfs2_xattr_search xis = { | |
1912 | + .not_found = -ENODATA, | |
1913 | + }; | |
1914 | + | |
1915 | + struct ocfs2_xattr_search xbs = { | |
1916 | + .not_found = -ENODATA, | |
1917 | + }; | |
1918 | + | |
1919 | + ret = ocfs2_inode_lock(inode, &di_bh, 1); | |
1920 | + if (ret < 0) { | |
1921 | + mlog_errno(ret); | |
1922 | + return ret; | |
1923 | + } | |
1924 | + xis.inode_bh = xbs.inode_bh = di_bh; | |
1925 | + di = (struct ocfs2_dinode *)di_bh->b_data; | |
1926 | + | |
1927 | + down_write(&OCFS2_I(inode)->ip_xattr_sem); | |
1928 | + /* | |
1929 | + * Scan inode and external block to find the same name | |
1930 | + * extended attribute and collect search infomation. | |
1931 | + */ | |
1932 | + ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); | |
1933 | + if (ret) | |
1934 | + goto cleanup; | |
1935 | + if (xis.not_found) { | |
1936 | + ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); | |
1937 | + if (ret) | |
1938 | + goto cleanup; | |
1939 | + } | |
1940 | + | |
1941 | + if (xis.not_found && xbs.not_found) { | |
1942 | + ret = -ENODATA; | |
1943 | + if (flags & XATTR_REPLACE) | |
1944 | + goto cleanup; | |
1945 | + ret = 0; | |
1946 | + if (!value) | |
1947 | + goto cleanup; | |
1948 | + } else { | |
1949 | + ret = -EEXIST; | |
1950 | + if (flags & XATTR_CREATE) | |
1951 | + goto cleanup; | |
1952 | + } | |
1953 | + | |
1954 | + if (!value) { | |
1955 | + /* Remove existing extended attribute */ | |
1956 | + if (!xis.not_found) | |
1957 | + ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
1958 | + else if (!xbs.not_found) | |
1959 | + ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
1960 | + } else { | |
1961 | + /* We always try to set extended attribute into inode first*/ | |
1962 | + ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
1963 | + if (!ret && !xbs.not_found) { | |
1964 | + /* | |
1965 | + * If succeed and that extended attribute existing in | |
1966 | + * external block, then we will remove it. | |
1967 | + */ | |
1968 | + xi.value = NULL; | |
1969 | + xi.value_len = 0; | |
1970 | + ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
1971 | + } else if (ret == -ENOSPC) { | |
1972 | + if (di->i_xattr_loc && !xbs.xattr_bh) { | |
1973 | + ret = ocfs2_xattr_block_find(inode, name_index, | |
1974 | + name, &xbs); | |
1975 | + if (ret) | |
1976 | + goto cleanup; | |
1977 | + } | |
1978 | + /* | |
1979 | + * If no space in inode, we will set extended attribute | |
1980 | + * into external block. | |
1981 | + */ | |
1982 | + ret = ocfs2_xattr_block_set(inode, &xi, &xbs); | |
1983 | + if (ret) | |
1984 | + goto cleanup; | |
1985 | + if (!xis.not_found) { | |
1986 | + /* | |
1987 | + * If succeed and that extended attribute | |
1988 | + * existing in inode, we will remove it. | |
1989 | + */ | |
1990 | + xi.value = NULL; | |
1991 | + xi.value_len = 0; | |
1992 | + ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); | |
1993 | + } | |
1994 | + } | |
1995 | + } | |
1996 | +cleanup: | |
1997 | + up_write(&OCFS2_I(inode)->ip_xattr_sem); | |
1998 | + ocfs2_inode_unlock(inode, 1); | |
1999 | + brelse(di_bh); | |
2000 | + brelse(xbs.xattr_bh); | |
2001 | + | |
2002 | + return ret; | |
2003 | +} | |
2004 | + | |
2005 | --- /dev/null | |
2006 | +++ b/fs/ocfs2/xattr.h | |
2007 | @@ -0,0 +1,58 @@ | |
2008 | +/* -*- mode: c; c-basic-offset: 8; -*- | |
2009 | + * vim: noexpandtab sw=8 ts=8 sts=0: | |
2010 | + * | |
2011 | + * xattr.h | |
2012 | + * | |
2013 | + * Function prototypes | |
2014 | + * | |
2015 | + * Copyright (C) 2008 Oracle. All rights reserved. | |
2016 | + * | |
2017 | + * This program is free software; you can redistribute it and/or | |
2018 | + * modify it under the terms of the GNU General Public | |
2019 | + * License as published by the Free Software Foundation; either | |
2020 | + * version 2 of the License, or (at your option) any later version. | |
2021 | + * | |
2022 | + * This program is distributed in the hope that it will be useful, | |
2023 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
2024 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
2025 | + * General Public License for more details. | |
2026 | + * | |
2027 | + * You should have received a copy of the GNU General Public | |
2028 | + * License along with this program; if not, write to the | |
2029 | + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
2030 | + * Boston, MA 021110-1307, USA. | |
2031 | + */ | |
2032 | + | |
2033 | +#ifndef OCFS2_XATTR_H | |
2034 | +#define OCFS2_XATTR_H | |
2035 | + | |
2036 | +#include <linux/init.h> | |
2037 | +#include <linux/xattr.h> | |
2038 | + | |
2039 | +enum ocfs2_xattr_type { | |
2040 | + OCFS2_XATTR_INDEX_USER = 1, | |
2041 | + OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS, | |
2042 | + OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, | |
2043 | + OCFS2_XATTR_INDEX_TRUSTED, | |
2044 | + OCFS2_XATTR_INDEX_SECURITY, | |
2045 | + OCFS2_XATTR_MAX | |
2046 | +}; | |
2047 | + | |
2048 | +extern struct xattr_handler ocfs2_xattr_user_handler; | |
2049 | +extern struct xattr_handler ocfs2_xattr_trusted_handler; | |
2050 | +#ifdef CONFIG_OCFS2_FS_POSIX_ACL | |
2051 | +extern struct xattr_handler ocfs2_xattr_acl_access_handler; | |
2052 | +extern struct xattr_handler ocfs2_xattr_acl_default_handler; | |
2053 | +#endif | |
2054 | +#ifdef CONFIG_OCFS2_FS_SECURITY | |
2055 | +extern struct xattr_handler ocfs2_xattr_security_handler; | |
2056 | +#endif | |
2057 | + | |
2058 | +extern ssize_t ocfs2_listxattr(struct dentry *, char *, size_t); | |
2059 | +extern int ocfs2_xattr_get(struct inode *, int, const char *, void *, size_t); | |
2060 | +extern int ocfs2_xattr_set(struct inode *, int, const char *, const void *, | |
2061 | + size_t, int); | |
2062 | +extern int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh); | |
2063 | +extern struct xattr_handler *ocfs2_xattr_handlers[]; | |
2064 | + | |
2065 | +#endif /* OCFS2_XATTR_H */ | |
2066 | --- /dev/null | |
2067 | +++ b/fs/ocfs2/xattr_trusted.c | |
2068 | @@ -0,0 +1,82 @@ | |
2069 | +/* -*- mode: c; c-basic-offset: 8; -*- | |
2070 | + * vim: noexpandtab sw=8 ts=8 sts=0: | |
2071 | + * | |
2072 | + * xattr_trusted.c | |
2073 | + * | |
2074 | + * Copyright (C) 2008 Oracle. All rights reserved. | |
2075 | + * | |
2076 | + * CREDITS: | |
2077 | + * Lots of code in this file is taken from ext3. | |
2078 | + * | |
2079 | + * This program is free software; you can redistribute it and/or | |
2080 | + * modify it under the terms of the GNU General Public | |
2081 | + * License as published by the Free Software Foundation; either | |
2082 | + * version 2 of the License, or (at your option) any later version. | |
2083 | + * | |
2084 | + * This program is distributed in the hope that it will be useful, | |
2085 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
2086 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
2087 | + * General Public License for more details. | |
2088 | + * | |
2089 | + * You should have received a copy of the GNU General Public | |
2090 | + * License along with this program; if not, write to the | |
2091 | + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
2092 | + * Boston, MA 021110-1307, USA. | |
2093 | + */ | |
2094 | + | |
2095 | +#include <linux/init.h> | |
2096 | +#include <linux/module.h> | |
2097 | +#include <linux/string.h> | |
2098 | + | |
2099 | +#define MLOG_MASK_PREFIX ML_INODE | |
2100 | +#include <cluster/masklog.h> | |
2101 | + | |
2102 | +#include "ocfs2.h" | |
2103 | +#include "alloc.h" | |
2104 | +#include "dlmglue.h" | |
2105 | +#include "file.h" | |
2106 | +#include "ocfs2_fs.h" | |
2107 | +#include "xattr.h" | |
2108 | + | |
2109 | +#define XATTR_TRUSTED_PREFIX "trusted." | |
2110 | + | |
2111 | +static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, | |
2112 | + size_t list_size, const char *name, | |
2113 | + size_t name_len) | |
2114 | +{ | |
2115 | + const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX) - 1; | |
2116 | + const size_t total_len = prefix_len + name_len + 1; | |
2117 | + | |
2118 | + if (list && total_len <= list_size) { | |
2119 | + memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); | |
2120 | + memcpy(list + prefix_len, name, name_len); | |
2121 | + list[prefix_len + name_len] = '\0'; | |
2122 | + } | |
2123 | + return total_len; | |
2124 | +} | |
2125 | + | |
2126 | +static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, | |
2127 | + void *buffer, size_t size) | |
2128 | +{ | |
2129 | + if (strcmp(name, "") == 0) | |
2130 | + return -EINVAL; | |
2131 | + return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, | |
2132 | + buffer, size); | |
2133 | +} | |
2134 | + | |
2135 | +static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, | |
2136 | + const void *value, size_t size, int flags) | |
2137 | +{ | |
2138 | + if (strcmp(name, "") == 0) | |
2139 | + return -EINVAL; | |
2140 | + | |
2141 | + return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, | |
2142 | + size, flags); | |
2143 | +} | |
2144 | + | |
2145 | +struct xattr_handler ocfs2_xattr_trusted_handler = { | |
2146 | + .prefix = XATTR_TRUSTED_PREFIX, | |
2147 | + .list = ocfs2_xattr_trusted_list, | |
2148 | + .get = ocfs2_xattr_trusted_get, | |
2149 | + .set = ocfs2_xattr_trusted_set, | |
2150 | +}; | |
2151 | --- /dev/null | |
2152 | +++ b/fs/ocfs2/xattr_user.c | |
2153 | @@ -0,0 +1,94 @@ | |
2154 | +/* -*- mode: c; c-basic-offset: 8; -*- | |
2155 | + * vim: noexpandtab sw=8 ts=8 sts=0: | |
2156 | + * | |
2157 | + * xattr_user.c | |
2158 | + * | |
2159 | + * Copyright (C) 2008 Oracle. All rights reserved. | |
2160 | + * | |
2161 | + * CREDITS: | |
2162 | + * Lots of code in this file is taken from ext3. | |
2163 | + * | |
2164 | + * This program is free software; you can redistribute it and/or | |
2165 | + * modify it under the terms of the GNU General Public | |
2166 | + * License as published by the Free Software Foundation; either | |
2167 | + * version 2 of the License, or (at your option) any later version. | |
2168 | + * | |
2169 | + * This program is distributed in the hope that it will be useful, | |
2170 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
2171 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
2172 | + * General Public License for more details. | |
2173 | + * | |
2174 | + * You should have received a copy of the GNU General Public | |
2175 | + * License along with this program; if not, write to the | |
2176 | + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
2177 | + * Boston, MA 021110-1307, USA. | |
2178 | + */ | |
2179 | + | |
2180 | +#include <linux/init.h> | |
2181 | +#include <linux/module.h> | |
2182 | +#include <linux/string.h> | |
2183 | + | |
2184 | +#define MLOG_MASK_PREFIX ML_INODE | |
2185 | +#include <cluster/masklog.h> | |
2186 | + | |
2187 | +#include "ocfs2.h" | |
2188 | +#include "alloc.h" | |
2189 | +#include "dlmglue.h" | |
2190 | +#include "file.h" | |
2191 | +#include "ocfs2_fs.h" | |
2192 | +#include "xattr.h" | |
2193 | + | |
2194 | +#define XATTR_USER_PREFIX "user." | |
2195 | + | |
2196 | +static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, | |
2197 | + size_t list_size, const char *name, | |
2198 | + size_t name_len) | |
2199 | +{ | |
2200 | + const size_t prefix_len = sizeof(XATTR_USER_PREFIX) - 1; | |
2201 | + const size_t total_len = prefix_len + name_len + 1; | |
2202 | + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2203 | + | |
2204 | + if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
2205 | + return 0; | |
2206 | + | |
2207 | + if (list && total_len <= list_size) { | |
2208 | + memcpy(list, XATTR_USER_PREFIX, prefix_len); | |
2209 | + memcpy(list + prefix_len, name, name_len); | |
2210 | + list[prefix_len + name_len] = '\0'; | |
2211 | + } | |
2212 | + return total_len; | |
2213 | +} | |
2214 | + | |
2215 | +static int ocfs2_xattr_user_get(struct inode *inode, const char *name, | |
2216 | + void *buffer, size_t size) | |
2217 | +{ | |
2218 | + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2219 | + | |
2220 | + if (strcmp(name, "") == 0) | |
2221 | + return -EINVAL; | |
2222 | + if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
2223 | + return -EOPNOTSUPP; | |
2224 | + return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, | |
2225 | + buffer, size); | |
2226 | +} | |
2227 | + | |
2228 | +static int ocfs2_xattr_user_set(struct inode *inode, const char *name, | |
2229 | + const void *value, size_t size, int flags) | |
2230 | +{ | |
2231 | + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
2232 | + | |
2233 | + if (strcmp(name, "") == 0) | |
2234 | + return -EINVAL; | |
2235 | + if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) | |
2236 | + return -EOPNOTSUPP; | |
2237 | + | |
2238 | + return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, | |
2239 | + size, flags); | |
2240 | +} | |
2241 | + | |
2242 | +struct xattr_handler ocfs2_xattr_user_handler = { | |
2243 | + .prefix = XATTR_USER_PREFIX, | |
2244 | + .list = ocfs2_xattr_user_list, | |
2245 | + .get = ocfs2_xattr_user_get, | |
2246 | + .set = ocfs2_xattr_user_set, | |
2247 | +}; |