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[people/teissler/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.suse / ocfs2-Add-extended-attribute-support.patch
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 +};
Timo's tree of IPFire 2.x