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1da177e4 LT |
1 | /* |
2 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
3 | * Copyright (C) Christoph Hellwig, 2002 | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
63f83c9f | 7 | * the Free Software Foundation; either version 2 of the License, or |
1da177e4 | 8 | * (at your option) any later version. |
63f83c9f | 9 | * |
1da177e4 LT |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
13 | * the GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
63f83c9f | 16 | * along with this program; if not, write to the Free Software |
1da177e4 LT |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
18 | */ | |
19 | ||
16f7e0fe | 20 | #include <linux/capability.h> |
1da177e4 LT |
21 | #include <linux/fs.h> |
22 | #include <linux/xattr.h> | |
9a59f452 | 23 | #include <linux/posix_acl_xattr.h> |
5a0e3ad6 | 24 | #include <linux/slab.h> |
1da177e4 | 25 | #include <linux/quotaops.h> |
1d15b10f | 26 | #include <linux/security.h> |
1da177e4 LT |
27 | #include "jfs_incore.h" |
28 | #include "jfs_superblock.h" | |
29 | #include "jfs_dmap.h" | |
30 | #include "jfs_debug.h" | |
31 | #include "jfs_dinode.h" | |
32 | #include "jfs_extent.h" | |
33 | #include "jfs_metapage.h" | |
34 | #include "jfs_xattr.h" | |
35 | #include "jfs_acl.h" | |
36 | ||
37 | /* | |
38 | * jfs_xattr.c: extended attribute service | |
39 | * | |
40 | * Overall design -- | |
41 | * | |
42 | * Format: | |
43 | * | |
44 | * Extended attribute lists (jfs_ea_list) consist of an overall size (32 bit | |
45 | * value) and a variable (0 or more) number of extended attribute | |
46 | * entries. Each extended attribute entry (jfs_ea) is a <name,value> double | |
47 | * where <name> is constructed from a null-terminated ascii string | |
48 | * (1 ... 255 bytes in the name) and <value> is arbitrary 8 bit data | |
49 | * (1 ... 65535 bytes). The in-memory format is | |
50 | * | |
51 | * 0 1 2 4 4 + namelen + 1 | |
52 | * +-------+--------+--------+----------------+-------------------+ | |
53 | * | Flags | Name | Value | Name String \0 | Data . . . . | | |
54 | * | | Length | Length | | | | |
55 | * +-------+--------+--------+----------------+-------------------+ | |
56 | * | |
57 | * A jfs_ea_list then is structured as | |
58 | * | |
59 | * 0 4 4 + EA_SIZE(ea1) | |
60 | * +------------+-------------------+--------------------+----- | |
63f83c9f | 61 | * | Overall EA | First FEA Element | Second FEA Element | ..... |
1da177e4 LT |
62 | * | List Size | | | |
63 | * +------------+-------------------+--------------------+----- | |
64 | * | |
65 | * On-disk: | |
66 | * | |
f720e3ba DK |
67 | * FEALISTs are stored on disk using blocks allocated by dbAlloc() and |
68 | * written directly. An EA list may be in-lined in the inode if there is | |
69 | * sufficient room available. | |
1da177e4 LT |
70 | */ |
71 | ||
72 | struct ea_buffer { | |
73 | int flag; /* Indicates what storage xattr points to */ | |
74 | int max_size; /* largest xattr that fits in current buffer */ | |
75 | dxd_t new_ea; /* dxd to replace ea when modifying xattr */ | |
76 | struct metapage *mp; /* metapage containing ea list */ | |
77 | struct jfs_ea_list *xattr; /* buffer containing ea list */ | |
78 | }; | |
79 | ||
80 | /* | |
81 | * ea_buffer.flag values | |
82 | */ | |
83 | #define EA_INLINE 0x0001 | |
84 | #define EA_EXTENT 0x0002 | |
85 | #define EA_NEW 0x0004 | |
86 | #define EA_MALLOC 0x0008 | |
87 | ||
1da177e4 LT |
88 | |
89 | /* | |
90 | * These three routines are used to recognize on-disk extended attributes | |
91 | * that are in a recognized namespace. If the attribute is not recognized, | |
92 | * "os2." is prepended to the name | |
93 | */ | |
94 | static inline int is_os2_xattr(struct jfs_ea *ea) | |
95 | { | |
96 | /* | |
97 | * Check for "system." | |
98 | */ | |
99 | if ((ea->namelen >= XATTR_SYSTEM_PREFIX_LEN) && | |
100 | !strncmp(ea->name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) | |
4d81715f | 101 | return false; |
1da177e4 LT |
102 | /* |
103 | * Check for "user." | |
104 | */ | |
105 | if ((ea->namelen >= XATTR_USER_PREFIX_LEN) && | |
106 | !strncmp(ea->name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) | |
4d81715f | 107 | return false; |
1da177e4 LT |
108 | /* |
109 | * Check for "security." | |
110 | */ | |
111 | if ((ea->namelen >= XATTR_SECURITY_PREFIX_LEN) && | |
112 | !strncmp(ea->name, XATTR_SECURITY_PREFIX, | |
113 | XATTR_SECURITY_PREFIX_LEN)) | |
4d81715f | 114 | return false; |
1da177e4 LT |
115 | /* |
116 | * Check for "trusted." | |
117 | */ | |
118 | if ((ea->namelen >= XATTR_TRUSTED_PREFIX_LEN) && | |
119 | !strncmp(ea->name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN)) | |
4d81715f | 120 | return false; |
1da177e4 LT |
121 | /* |
122 | * Add any other valid namespace prefixes here | |
123 | */ | |
124 | ||
125 | /* | |
126 | * We assume it's OS/2's flat namespace | |
127 | */ | |
4d81715f | 128 | return true; |
1da177e4 LT |
129 | } |
130 | ||
131 | static inline int name_size(struct jfs_ea *ea) | |
132 | { | |
133 | if (is_os2_xattr(ea)) | |
134 | return ea->namelen + XATTR_OS2_PREFIX_LEN; | |
135 | else | |
136 | return ea->namelen; | |
137 | } | |
138 | ||
139 | static inline int copy_name(char *buffer, struct jfs_ea *ea) | |
140 | { | |
141 | int len = ea->namelen; | |
142 | ||
143 | if (is_os2_xattr(ea)) { | |
144 | memcpy(buffer, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN); | |
145 | buffer += XATTR_OS2_PREFIX_LEN; | |
146 | len += XATTR_OS2_PREFIX_LEN; | |
147 | } | |
148 | memcpy(buffer, ea->name, ea->namelen); | |
149 | buffer[ea->namelen] = 0; | |
150 | ||
151 | return len; | |
152 | } | |
153 | ||
154 | /* Forward references */ | |
155 | static void ea_release(struct inode *inode, struct ea_buffer *ea_buf); | |
156 | ||
157 | /* | |
158 | * NAME: ea_write_inline | |
63f83c9f | 159 | * |
1da177e4 | 160 | * FUNCTION: Attempt to write an EA inline if area is available |
63f83c9f | 161 | * |
1da177e4 LT |
162 | * PRE CONDITIONS: |
163 | * Already verified that the specified EA is small enough to fit inline | |
164 | * | |
165 | * PARAMETERS: | |
166 | * ip - Inode pointer | |
167 | * ealist - EA list pointer | |
168 | * size - size of ealist in bytes | |
169 | * ea - dxd_t structure to be filled in with necessary EA information | |
170 | * if we successfully copy the EA inline | |
171 | * | |
172 | * NOTES: | |
173 | * Checks if the inode's inline area is available. If so, copies EA inline | |
174 | * and sets <ea> fields appropriately. Otherwise, returns failure, EA will | |
175 | * have to be put into an extent. | |
176 | * | |
177 | * RETURNS: 0 for successful copy to inline area; -1 if area not available | |
178 | */ | |
179 | static int ea_write_inline(struct inode *ip, struct jfs_ea_list *ealist, | |
180 | int size, dxd_t * ea) | |
181 | { | |
182 | struct jfs_inode_info *ji = JFS_IP(ip); | |
183 | ||
184 | /* | |
185 | * Make sure we have an EA -- the NULL EA list is valid, but you | |
186 | * can't copy it! | |
187 | */ | |
188 | if (ealist && size > sizeof (struct jfs_ea_list)) { | |
189 | assert(size <= sizeof (ji->i_inline_ea)); | |
190 | ||
191 | /* | |
192 | * See if the space is available or if it is already being | |
193 | * used for an inline EA. | |
194 | */ | |
195 | if (!(ji->mode2 & INLINEEA) && !(ji->ea.flag & DXD_INLINE)) | |
196 | return -EPERM; | |
197 | ||
198 | DXDsize(ea, size); | |
199 | DXDlength(ea, 0); | |
200 | DXDaddress(ea, 0); | |
201 | memcpy(ji->i_inline_ea, ealist, size); | |
202 | ea->flag = DXD_INLINE; | |
203 | ji->mode2 &= ~INLINEEA; | |
204 | } else { | |
205 | ea->flag = 0; | |
206 | DXDsize(ea, 0); | |
207 | DXDlength(ea, 0); | |
208 | DXDaddress(ea, 0); | |
209 | ||
210 | /* Free up INLINE area */ | |
211 | if (ji->ea.flag & DXD_INLINE) | |
212 | ji->mode2 |= INLINEEA; | |
213 | } | |
214 | ||
215 | return 0; | |
216 | } | |
217 | ||
218 | /* | |
219 | * NAME: ea_write | |
63f83c9f | 220 | * |
1da177e4 | 221 | * FUNCTION: Write an EA for an inode |
63f83c9f DK |
222 | * |
223 | * PRE CONDITIONS: EA has been verified | |
1da177e4 LT |
224 | * |
225 | * PARAMETERS: | |
226 | * ip - Inode pointer | |
227 | * ealist - EA list pointer | |
228 | * size - size of ealist in bytes | |
229 | * ea - dxd_t structure to be filled in appropriately with where the | |
230 | * EA was copied | |
231 | * | |
232 | * NOTES: Will write EA inline if able to, otherwise allocates blocks for an | |
233 | * extent and synchronously writes it to those blocks. | |
234 | * | |
235 | * RETURNS: 0 for success; Anything else indicates failure | |
236 | */ | |
237 | static int ea_write(struct inode *ip, struct jfs_ea_list *ealist, int size, | |
238 | dxd_t * ea) | |
239 | { | |
240 | struct super_block *sb = ip->i_sb; | |
241 | struct jfs_inode_info *ji = JFS_IP(ip); | |
242 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
243 | int nblocks; | |
244 | s64 blkno; | |
245 | int rc = 0, i; | |
246 | char *cp; | |
247 | s32 nbytes, nb; | |
248 | s32 bytes_to_write; | |
249 | struct metapage *mp; | |
250 | ||
251 | /* | |
252 | * Quick check to see if this is an in-linable EA. Short EAs | |
253 | * and empty EAs are all in-linable, provided the space exists. | |
254 | */ | |
255 | if (!ealist || size <= sizeof (ji->i_inline_ea)) { | |
256 | if (!ea_write_inline(ip, ealist, size, ea)) | |
257 | return 0; | |
258 | } | |
259 | ||
260 | /* figure out how many blocks we need */ | |
261 | nblocks = (size + (sb->s_blocksize - 1)) >> sb->s_blocksize_bits; | |
262 | ||
263 | /* Allocate new blocks to quota. */ | |
5dd4056d CH |
264 | rc = dquot_alloc_block(ip, nblocks); |
265 | if (rc) | |
266 | return rc; | |
1da177e4 LT |
267 | |
268 | rc = dbAlloc(ip, INOHINT(ip), nblocks, &blkno); | |
269 | if (rc) { | |
270 | /*Rollback quota allocation. */ | |
5dd4056d | 271 | dquot_free_block(ip, nblocks); |
1da177e4 LT |
272 | return rc; |
273 | } | |
274 | ||
275 | /* | |
276 | * Now have nblocks worth of storage to stuff into the FEALIST. | |
277 | * loop over the FEALIST copying data into the buffer one page at | |
278 | * a time. | |
279 | */ | |
280 | cp = (char *) ealist; | |
281 | nbytes = size; | |
282 | for (i = 0; i < nblocks; i += sbi->nbperpage) { | |
283 | /* | |
284 | * Determine how many bytes for this request, and round up to | |
285 | * the nearest aggregate block size | |
286 | */ | |
287 | nb = min(PSIZE, nbytes); | |
288 | bytes_to_write = | |
289 | ((((nb + sb->s_blocksize - 1)) >> sb->s_blocksize_bits)) | |
290 | << sb->s_blocksize_bits; | |
291 | ||
292 | if (!(mp = get_metapage(ip, blkno + i, bytes_to_write, 1))) { | |
293 | rc = -EIO; | |
294 | goto failed; | |
295 | } | |
296 | ||
297 | memcpy(mp->data, cp, nb); | |
298 | ||
299 | /* | |
300 | * We really need a way to propagate errors for | |
301 | * forced writes like this one. --hch | |
302 | * | |
303 | * (__write_metapage => release_metapage => flush_metapage) | |
304 | */ | |
305 | #ifdef _JFS_FIXME | |
306 | if ((rc = flush_metapage(mp))) { | |
307 | /* | |
308 | * the write failed -- this means that the buffer | |
309 | * is still assigned and the blocks are not being | |
310 | * used. this seems like the best error recovery | |
311 | * we can get ... | |
312 | */ | |
313 | goto failed; | |
314 | } | |
315 | #else | |
316 | flush_metapage(mp); | |
317 | #endif | |
318 | ||
319 | cp += PSIZE; | |
320 | nbytes -= nb; | |
321 | } | |
322 | ||
323 | ea->flag = DXD_EXTENT; | |
324 | DXDsize(ea, le32_to_cpu(ealist->size)); | |
325 | DXDlength(ea, nblocks); | |
326 | DXDaddress(ea, blkno); | |
327 | ||
328 | /* Free up INLINE area */ | |
329 | if (ji->ea.flag & DXD_INLINE) | |
330 | ji->mode2 |= INLINEEA; | |
331 | ||
332 | return 0; | |
333 | ||
334 | failed: | |
335 | /* Rollback quota allocation. */ | |
5dd4056d | 336 | dquot_free_block(ip, nblocks); |
1da177e4 LT |
337 | |
338 | dbFree(ip, blkno, nblocks); | |
339 | return rc; | |
340 | } | |
341 | ||
342 | /* | |
343 | * NAME: ea_read_inline | |
63f83c9f | 344 | * |
1da177e4 | 345 | * FUNCTION: Read an inlined EA into user's buffer |
63f83c9f | 346 | * |
1da177e4 LT |
347 | * PARAMETERS: |
348 | * ip - Inode pointer | |
349 | * ealist - Pointer to buffer to fill in with EA | |
350 | * | |
351 | * RETURNS: 0 | |
352 | */ | |
353 | static int ea_read_inline(struct inode *ip, struct jfs_ea_list *ealist) | |
354 | { | |
355 | struct jfs_inode_info *ji = JFS_IP(ip); | |
356 | int ea_size = sizeDXD(&ji->ea); | |
357 | ||
358 | if (ea_size == 0) { | |
359 | ealist->size = 0; | |
360 | return 0; | |
361 | } | |
362 | ||
363 | /* Sanity Check */ | |
364 | if ((sizeDXD(&ji->ea) > sizeof (ji->i_inline_ea))) | |
365 | return -EIO; | |
366 | if (le32_to_cpu(((struct jfs_ea_list *) &ji->i_inline_ea)->size) | |
367 | != ea_size) | |
368 | return -EIO; | |
369 | ||
370 | memcpy(ealist, ji->i_inline_ea, ea_size); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | /* | |
375 | * NAME: ea_read | |
63f83c9f | 376 | * |
1da177e4 | 377 | * FUNCTION: copy EA data into user's buffer |
63f83c9f | 378 | * |
1da177e4 LT |
379 | * PARAMETERS: |
380 | * ip - Inode pointer | |
381 | * ealist - Pointer to buffer to fill in with EA | |
382 | * | |
383 | * NOTES: If EA is inline calls ea_read_inline() to copy EA. | |
384 | * | |
385 | * RETURNS: 0 for success; other indicates failure | |
386 | */ | |
387 | static int ea_read(struct inode *ip, struct jfs_ea_list *ealist) | |
388 | { | |
389 | struct super_block *sb = ip->i_sb; | |
390 | struct jfs_inode_info *ji = JFS_IP(ip); | |
391 | struct jfs_sb_info *sbi = JFS_SBI(sb); | |
392 | int nblocks; | |
393 | s64 blkno; | |
394 | char *cp = (char *) ealist; | |
395 | int i; | |
396 | int nbytes, nb; | |
397 | s32 bytes_to_read; | |
398 | struct metapage *mp; | |
399 | ||
400 | /* quick check for in-line EA */ | |
401 | if (ji->ea.flag & DXD_INLINE) | |
402 | return ea_read_inline(ip, ealist); | |
403 | ||
404 | nbytes = sizeDXD(&ji->ea); | |
405 | if (!nbytes) { | |
406 | jfs_error(sb, "ea_read: nbytes is 0"); | |
407 | return -EIO; | |
408 | } | |
409 | ||
63f83c9f | 410 | /* |
1da177e4 LT |
411 | * Figure out how many blocks were allocated when this EA list was |
412 | * originally written to disk. | |
413 | */ | |
414 | nblocks = lengthDXD(&ji->ea) << sbi->l2nbperpage; | |
415 | blkno = addressDXD(&ji->ea) << sbi->l2nbperpage; | |
416 | ||
417 | /* | |
418 | * I have found the disk blocks which were originally used to store | |
419 | * the FEALIST. now i loop over each contiguous block copying the | |
420 | * data into the buffer. | |
421 | */ | |
422 | for (i = 0; i < nblocks; i += sbi->nbperpage) { | |
423 | /* | |
424 | * Determine how many bytes for this request, and round up to | |
425 | * the nearest aggregate block size | |
426 | */ | |
427 | nb = min(PSIZE, nbytes); | |
428 | bytes_to_read = | |
429 | ((((nb + sb->s_blocksize - 1)) >> sb->s_blocksize_bits)) | |
430 | << sb->s_blocksize_bits; | |
431 | ||
432 | if (!(mp = read_metapage(ip, blkno + i, bytes_to_read, 1))) | |
433 | return -EIO; | |
434 | ||
435 | memcpy(cp, mp->data, nb); | |
436 | release_metapage(mp); | |
437 | ||
438 | cp += PSIZE; | |
439 | nbytes -= nb; | |
440 | } | |
441 | ||
442 | return 0; | |
443 | } | |
444 | ||
445 | /* | |
446 | * NAME: ea_get | |
63f83c9f | 447 | * |
1da177e4 LT |
448 | * FUNCTION: Returns buffer containing existing extended attributes. |
449 | * The size of the buffer will be the larger of the existing | |
450 | * attributes size, or min_size. | |
451 | * | |
452 | * The buffer, which may be inlined in the inode or in the | |
63f83c9f DK |
453 | * page cache must be release by calling ea_release or ea_put |
454 | * | |
1da177e4 LT |
455 | * PARAMETERS: |
456 | * inode - Inode pointer | |
457 | * ea_buf - Structure to be populated with ealist and its metadata | |
458 | * min_size- minimum size of buffer to be returned | |
459 | * | |
460 | * RETURNS: 0 for success; Other indicates failure | |
461 | */ | |
462 | static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size) | |
463 | { | |
464 | struct jfs_inode_info *ji = JFS_IP(inode); | |
465 | struct super_block *sb = inode->i_sb; | |
466 | int size; | |
467 | int ea_size = sizeDXD(&ji->ea); | |
468 | int blocks_needed, current_blocks; | |
469 | s64 blkno; | |
470 | int rc; | |
471 | int quota_allocation = 0; | |
472 | ||
473 | /* When fsck.jfs clears a bad ea, it doesn't clear the size */ | |
474 | if (ji->ea.flag == 0) | |
475 | ea_size = 0; | |
476 | ||
477 | if (ea_size == 0) { | |
478 | if (min_size == 0) { | |
479 | ea_buf->flag = 0; | |
480 | ea_buf->max_size = 0; | |
481 | ea_buf->xattr = NULL; | |
482 | return 0; | |
483 | } | |
484 | if ((min_size <= sizeof (ji->i_inline_ea)) && | |
485 | (ji->mode2 & INLINEEA)) { | |
486 | ea_buf->flag = EA_INLINE | EA_NEW; | |
487 | ea_buf->max_size = sizeof (ji->i_inline_ea); | |
488 | ea_buf->xattr = (struct jfs_ea_list *) ji->i_inline_ea; | |
489 | DXDlength(&ea_buf->new_ea, 0); | |
490 | DXDaddress(&ea_buf->new_ea, 0); | |
491 | ea_buf->new_ea.flag = DXD_INLINE; | |
492 | DXDsize(&ea_buf->new_ea, min_size); | |
493 | return 0; | |
494 | } | |
495 | current_blocks = 0; | |
496 | } else if (ji->ea.flag & DXD_INLINE) { | |
497 | if (min_size <= sizeof (ji->i_inline_ea)) { | |
498 | ea_buf->flag = EA_INLINE; | |
499 | ea_buf->max_size = sizeof (ji->i_inline_ea); | |
500 | ea_buf->xattr = (struct jfs_ea_list *) ji->i_inline_ea; | |
501 | goto size_check; | |
502 | } | |
503 | current_blocks = 0; | |
504 | } else { | |
505 | if (!(ji->ea.flag & DXD_EXTENT)) { | |
506 | jfs_error(sb, "ea_get: invalid ea.flag)"); | |
507 | return -EIO; | |
508 | } | |
509 | current_blocks = (ea_size + sb->s_blocksize - 1) >> | |
510 | sb->s_blocksize_bits; | |
511 | } | |
512 | size = max(min_size, ea_size); | |
513 | ||
514 | if (size > PSIZE) { | |
515 | /* | |
516 | * To keep the rest of the code simple. Allocate a | |
517 | * contiguous buffer to work with | |
518 | */ | |
519 | ea_buf->xattr = kmalloc(size, GFP_KERNEL); | |
520 | if (ea_buf->xattr == NULL) | |
521 | return -ENOMEM; | |
522 | ||
523 | ea_buf->flag = EA_MALLOC; | |
524 | ea_buf->max_size = (size + sb->s_blocksize - 1) & | |
525 | ~(sb->s_blocksize - 1); | |
526 | ||
527 | if (ea_size == 0) | |
528 | return 0; | |
529 | ||
530 | if ((rc = ea_read(inode, ea_buf->xattr))) { | |
531 | kfree(ea_buf->xattr); | |
532 | ea_buf->xattr = NULL; | |
533 | return rc; | |
534 | } | |
535 | goto size_check; | |
536 | } | |
537 | blocks_needed = (min_size + sb->s_blocksize - 1) >> | |
538 | sb->s_blocksize_bits; | |
539 | ||
540 | if (blocks_needed > current_blocks) { | |
541 | /* Allocate new blocks to quota. */ | |
5dd4056d CH |
542 | rc = dquot_alloc_block(inode, blocks_needed); |
543 | if (rc) | |
1da177e4 LT |
544 | return -EDQUOT; |
545 | ||
546 | quota_allocation = blocks_needed; | |
547 | ||
548 | rc = dbAlloc(inode, INOHINT(inode), (s64) blocks_needed, | |
549 | &blkno); | |
550 | if (rc) | |
551 | goto clean_up; | |
552 | ||
553 | DXDlength(&ea_buf->new_ea, blocks_needed); | |
554 | DXDaddress(&ea_buf->new_ea, blkno); | |
555 | ea_buf->new_ea.flag = DXD_EXTENT; | |
556 | DXDsize(&ea_buf->new_ea, min_size); | |
557 | ||
558 | ea_buf->flag = EA_EXTENT | EA_NEW; | |
559 | ||
560 | ea_buf->mp = get_metapage(inode, blkno, | |
561 | blocks_needed << sb->s_blocksize_bits, | |
562 | 1); | |
563 | if (ea_buf->mp == NULL) { | |
564 | dbFree(inode, blkno, (s64) blocks_needed); | |
565 | rc = -EIO; | |
566 | goto clean_up; | |
567 | } | |
568 | ea_buf->xattr = ea_buf->mp->data; | |
569 | ea_buf->max_size = (min_size + sb->s_blocksize - 1) & | |
570 | ~(sb->s_blocksize - 1); | |
571 | if (ea_size == 0) | |
572 | return 0; | |
573 | if ((rc = ea_read(inode, ea_buf->xattr))) { | |
574 | discard_metapage(ea_buf->mp); | |
575 | dbFree(inode, blkno, (s64) blocks_needed); | |
576 | goto clean_up; | |
577 | } | |
578 | goto size_check; | |
579 | } | |
580 | ea_buf->flag = EA_EXTENT; | |
581 | ea_buf->mp = read_metapage(inode, addressDXD(&ji->ea), | |
582 | lengthDXD(&ji->ea) << sb->s_blocksize_bits, | |
583 | 1); | |
584 | if (ea_buf->mp == NULL) { | |
585 | rc = -EIO; | |
586 | goto clean_up; | |
587 | } | |
588 | ea_buf->xattr = ea_buf->mp->data; | |
589 | ea_buf->max_size = (ea_size + sb->s_blocksize - 1) & | |
590 | ~(sb->s_blocksize - 1); | |
591 | ||
592 | size_check: | |
593 | if (EALIST_SIZE(ea_buf->xattr) != ea_size) { | |
594 | printk(KERN_ERR "ea_get: invalid extended attribute\n"); | |
288e4d83 DK |
595 | print_hex_dump(KERN_ERR, "", DUMP_PREFIX_ADDRESS, 16, 1, |
596 | ea_buf->xattr, ea_size, 1); | |
1da177e4 LT |
597 | ea_release(inode, ea_buf); |
598 | rc = -EIO; | |
599 | goto clean_up; | |
600 | } | |
601 | ||
602 | return ea_size; | |
603 | ||
604 | clean_up: | |
605 | /* Rollback quota allocation */ | |
606 | if (quota_allocation) | |
5dd4056d | 607 | dquot_free_block(inode, quota_allocation); |
1da177e4 LT |
608 | |
609 | return (rc); | |
610 | } | |
611 | ||
612 | static void ea_release(struct inode *inode, struct ea_buffer *ea_buf) | |
613 | { | |
614 | if (ea_buf->flag & EA_MALLOC) | |
615 | kfree(ea_buf->xattr); | |
616 | else if (ea_buf->flag & EA_EXTENT) { | |
617 | assert(ea_buf->mp); | |
618 | release_metapage(ea_buf->mp); | |
619 | ||
620 | if (ea_buf->flag & EA_NEW) | |
621 | dbFree(inode, addressDXD(&ea_buf->new_ea), | |
622 | lengthDXD(&ea_buf->new_ea)); | |
623 | } | |
624 | } | |
625 | ||
4f4b401b DK |
626 | static int ea_put(tid_t tid, struct inode *inode, struct ea_buffer *ea_buf, |
627 | int new_size) | |
1da177e4 LT |
628 | { |
629 | struct jfs_inode_info *ji = JFS_IP(inode); | |
630 | unsigned long old_blocks, new_blocks; | |
631 | int rc = 0; | |
1da177e4 LT |
632 | |
633 | if (new_size == 0) { | |
634 | ea_release(inode, ea_buf); | |
635 | ea_buf = NULL; | |
636 | } else if (ea_buf->flag & EA_INLINE) { | |
637 | assert(new_size <= sizeof (ji->i_inline_ea)); | |
638 | ji->mode2 &= ~INLINEEA; | |
639 | ea_buf->new_ea.flag = DXD_INLINE; | |
640 | DXDsize(&ea_buf->new_ea, new_size); | |
641 | DXDaddress(&ea_buf->new_ea, 0); | |
642 | DXDlength(&ea_buf->new_ea, 0); | |
643 | } else if (ea_buf->flag & EA_MALLOC) { | |
644 | rc = ea_write(inode, ea_buf->xattr, new_size, &ea_buf->new_ea); | |
645 | kfree(ea_buf->xattr); | |
646 | } else if (ea_buf->flag & EA_NEW) { | |
647 | /* We have already allocated a new dxd */ | |
648 | flush_metapage(ea_buf->mp); | |
649 | } else { | |
650 | /* ->xattr must point to original ea's metapage */ | |
651 | rc = ea_write(inode, ea_buf->xattr, new_size, &ea_buf->new_ea); | |
652 | discard_metapage(ea_buf->mp); | |
653 | } | |
654 | if (rc) | |
655 | return rc; | |
656 | ||
1da177e4 LT |
657 | old_blocks = new_blocks = 0; |
658 | ||
659 | if (ji->ea.flag & DXD_EXTENT) { | |
660 | invalidate_dxd_metapages(inode, ji->ea); | |
661 | old_blocks = lengthDXD(&ji->ea); | |
662 | } | |
663 | ||
664 | if (ea_buf) { | |
665 | txEA(tid, inode, &ji->ea, &ea_buf->new_ea); | |
666 | if (ea_buf->new_ea.flag & DXD_EXTENT) { | |
667 | new_blocks = lengthDXD(&ea_buf->new_ea); | |
668 | if (ji->ea.flag & DXD_INLINE) | |
669 | ji->mode2 |= INLINEEA; | |
670 | } | |
671 | ji->ea = ea_buf->new_ea; | |
672 | } else { | |
673 | txEA(tid, inode, &ji->ea, NULL); | |
674 | if (ji->ea.flag & DXD_INLINE) | |
675 | ji->mode2 |= INLINEEA; | |
676 | ji->ea.flag = 0; | |
677 | ji->ea.size = 0; | |
678 | } | |
679 | ||
680 | /* If old blocks exist, they must be removed from quota allocation. */ | |
681 | if (old_blocks) | |
5dd4056d | 682 | dquot_free_block(inode, old_blocks); |
1da177e4 LT |
683 | |
684 | inode->i_ctime = CURRENT_TIME; | |
1da177e4 | 685 | |
4f4b401b | 686 | return 0; |
1da177e4 LT |
687 | } |
688 | ||
689 | /* | |
690 | * can_set_system_xattr | |
691 | * | |
692 | * This code is specific to the system.* namespace. It contains policy | |
693 | * which doesn't belong in the main xattr codepath. | |
694 | */ | |
695 | static int can_set_system_xattr(struct inode *inode, const char *name, | |
696 | const void *value, size_t value_len) | |
697 | { | |
698 | #ifdef CONFIG_JFS_POSIX_ACL | |
699 | struct posix_acl *acl; | |
700 | int rc; | |
701 | ||
3bd858ab | 702 | if (!is_owner_or_cap(inode)) |
1da177e4 LT |
703 | return -EPERM; |
704 | ||
705 | /* | |
9a59f452 | 706 | * POSIX_ACL_XATTR_ACCESS is tied to i_mode |
1da177e4 | 707 | */ |
9a59f452 | 708 | if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) { |
1da177e4 LT |
709 | acl = posix_acl_from_xattr(value, value_len); |
710 | if (IS_ERR(acl)) { | |
711 | rc = PTR_ERR(acl); | |
712 | printk(KERN_ERR "posix_acl_from_xattr returned %d\n", | |
713 | rc); | |
714 | return rc; | |
715 | } | |
716 | if (acl) { | |
717 | mode_t mode = inode->i_mode; | |
718 | rc = posix_acl_equiv_mode(acl, &mode); | |
719 | posix_acl_release(acl); | |
720 | if (rc < 0) { | |
721 | printk(KERN_ERR | |
722 | "posix_acl_equiv_mode returned %d\n", | |
723 | rc); | |
724 | return rc; | |
725 | } | |
726 | inode->i_mode = mode; | |
727 | mark_inode_dirty(inode); | |
728 | } | |
729 | /* | |
730 | * We're changing the ACL. Get rid of the cached one | |
731 | */ | |
073aaa1b | 732 | forget_cached_acl(inode, ACL_TYPE_ACCESS); |
1da177e4 LT |
733 | |
734 | return 0; | |
9a59f452 | 735 | } else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) { |
1da177e4 LT |
736 | acl = posix_acl_from_xattr(value, value_len); |
737 | if (IS_ERR(acl)) { | |
738 | rc = PTR_ERR(acl); | |
739 | printk(KERN_ERR "posix_acl_from_xattr returned %d\n", | |
740 | rc); | |
741 | return rc; | |
742 | } | |
743 | posix_acl_release(acl); | |
744 | ||
745 | /* | |
746 | * We're changing the default ACL. Get rid of the cached one | |
747 | */ | |
073aaa1b | 748 | forget_cached_acl(inode, ACL_TYPE_DEFAULT); |
1da177e4 LT |
749 | |
750 | return 0; | |
751 | } | |
752 | #endif /* CONFIG_JFS_POSIX_ACL */ | |
753 | return -EOPNOTSUPP; | |
754 | } | |
755 | ||
d572b879 DK |
756 | /* |
757 | * Most of the permission checking is done by xattr_permission in the vfs. | |
758 | * The local file system is responsible for handling the system.* namespace. | |
759 | * We also need to verify that this is a namespace that we recognize. | |
760 | */ | |
1da177e4 LT |
761 | static int can_set_xattr(struct inode *inode, const char *name, |
762 | const void *value, size_t value_len) | |
763 | { | |
44a0033f | 764 | if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) |
1da177e4 LT |
765 | return can_set_system_xattr(inode, name, value, value_len); |
766 | ||
44a0033f CH |
767 | /* |
768 | * Don't allow setting an attribute in an unknown namespace. | |
769 | */ | |
770 | if (strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) && | |
771 | strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) && | |
772 | strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && | |
773 | strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN)) | |
1da177e4 LT |
774 | return -EOPNOTSUPP; |
775 | ||
44a0033f | 776 | return 0; |
1da177e4 LT |
777 | } |
778 | ||
4f4b401b DK |
779 | int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name, |
780 | const void *value, size_t value_len, int flags) | |
1da177e4 LT |
781 | { |
782 | struct jfs_ea_list *ealist; | |
783 | struct jfs_ea *ea, *old_ea = NULL, *next_ea = NULL; | |
784 | struct ea_buffer ea_buf; | |
785 | int old_ea_size = 0; | |
786 | int xattr_size; | |
787 | int new_size; | |
788 | int namelen = strlen(name); | |
789 | char *os2name = NULL; | |
790 | int found = 0; | |
791 | int rc; | |
792 | int length; | |
793 | ||
1da177e4 LT |
794 | if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { |
795 | os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1, | |
796 | GFP_KERNEL); | |
797 | if (!os2name) | |
798 | return -ENOMEM; | |
799 | strcpy(os2name, name + XATTR_OS2_PREFIX_LEN); | |
800 | name = os2name; | |
801 | namelen -= XATTR_OS2_PREFIX_LEN; | |
802 | } | |
803 | ||
804 | down_write(&JFS_IP(inode)->xattr_sem); | |
805 | ||
806 | xattr_size = ea_get(inode, &ea_buf, 0); | |
807 | if (xattr_size < 0) { | |
808 | rc = xattr_size; | |
809 | goto out; | |
810 | } | |
811 | ||
812 | again: | |
813 | ealist = (struct jfs_ea_list *) ea_buf.xattr; | |
814 | new_size = sizeof (struct jfs_ea_list); | |
815 | ||
816 | if (xattr_size) { | |
817 | for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); | |
818 | ea = NEXT_EA(ea)) { | |
819 | if ((namelen == ea->namelen) && | |
820 | (memcmp(name, ea->name, namelen) == 0)) { | |
821 | found = 1; | |
822 | if (flags & XATTR_CREATE) { | |
823 | rc = -EEXIST; | |
824 | goto release; | |
825 | } | |
826 | old_ea = ea; | |
827 | old_ea_size = EA_SIZE(ea); | |
828 | next_ea = NEXT_EA(ea); | |
829 | } else | |
830 | new_size += EA_SIZE(ea); | |
831 | } | |
832 | } | |
833 | ||
834 | if (!found) { | |
835 | if (flags & XATTR_REPLACE) { | |
836 | rc = -ENODATA; | |
837 | goto release; | |
838 | } | |
839 | if (value == NULL) { | |
840 | rc = 0; | |
841 | goto release; | |
842 | } | |
843 | } | |
844 | if (value) | |
845 | new_size += sizeof (struct jfs_ea) + namelen + 1 + value_len; | |
846 | ||
847 | if (new_size > ea_buf.max_size) { | |
848 | /* | |
849 | * We need to allocate more space for merged ea list. | |
850 | * We should only have loop to again: once. | |
851 | */ | |
852 | ea_release(inode, &ea_buf); | |
853 | xattr_size = ea_get(inode, &ea_buf, new_size); | |
854 | if (xattr_size < 0) { | |
855 | rc = xattr_size; | |
856 | goto out; | |
857 | } | |
858 | goto again; | |
859 | } | |
860 | ||
861 | /* Remove old ea of the same name */ | |
862 | if (found) { | |
863 | /* number of bytes following target EA */ | |
864 | length = (char *) END_EALIST(ealist) - (char *) next_ea; | |
865 | if (length > 0) | |
866 | memmove(old_ea, next_ea, length); | |
867 | xattr_size -= old_ea_size; | |
868 | } | |
869 | ||
870 | /* Add new entry to the end */ | |
871 | if (value) { | |
872 | if (xattr_size == 0) | |
873 | /* Completely new ea list */ | |
874 | xattr_size = sizeof (struct jfs_ea_list); | |
875 | ||
876 | ea = (struct jfs_ea *) ((char *) ealist + xattr_size); | |
877 | ea->flag = 0; | |
878 | ea->namelen = namelen; | |
879 | ea->valuelen = (cpu_to_le16(value_len)); | |
880 | memcpy(ea->name, name, namelen); | |
881 | ea->name[namelen] = 0; | |
882 | if (value_len) | |
883 | memcpy(&ea->name[namelen + 1], value, value_len); | |
884 | xattr_size += EA_SIZE(ea); | |
885 | } | |
886 | ||
887 | /* DEBUG - If we did this right, these number match */ | |
888 | if (xattr_size != new_size) { | |
889 | printk(KERN_ERR | |
890 | "jfs_xsetattr: xattr_size = %d, new_size = %d\n", | |
891 | xattr_size, new_size); | |
892 | ||
893 | rc = -EINVAL; | |
894 | goto release; | |
895 | } | |
896 | ||
897 | /* | |
898 | * If we're left with an empty list, there's no ea | |
899 | */ | |
900 | if (new_size == sizeof (struct jfs_ea_list)) | |
901 | new_size = 0; | |
902 | ||
903 | ealist->size = cpu_to_le32(new_size); | |
904 | ||
4f4b401b | 905 | rc = ea_put(tid, inode, &ea_buf, new_size); |
1da177e4 LT |
906 | |
907 | goto out; | |
908 | release: | |
909 | ea_release(inode, &ea_buf); | |
910 | out: | |
911 | up_write(&JFS_IP(inode)->xattr_sem); | |
912 | ||
259692bd | 913 | kfree(os2name); |
1da177e4 LT |
914 | |
915 | return rc; | |
916 | } | |
917 | ||
918 | int jfs_setxattr(struct dentry *dentry, const char *name, const void *value, | |
919 | size_t value_len, int flags) | |
920 | { | |
4f4b401b DK |
921 | struct inode *inode = dentry->d_inode; |
922 | struct jfs_inode_info *ji = JFS_IP(inode); | |
923 | int rc; | |
924 | tid_t tid; | |
925 | ||
926 | if ((rc = can_set_xattr(inode, name, value, value_len))) | |
927 | return rc; | |
928 | ||
1da177e4 LT |
929 | if (value == NULL) { /* empty EA, do not remove */ |
930 | value = ""; | |
931 | value_len = 0; | |
932 | } | |
933 | ||
4f4b401b | 934 | tid = txBegin(inode->i_sb, 0); |
1de87444 | 935 | mutex_lock(&ji->commit_mutex); |
4f4b401b DK |
936 | rc = __jfs_setxattr(tid, dentry->d_inode, name, value, value_len, |
937 | flags); | |
938 | if (!rc) | |
939 | rc = txCommit(tid, 1, &inode, 0); | |
940 | txEnd(tid); | |
1de87444 | 941 | mutex_unlock(&ji->commit_mutex); |
4f4b401b DK |
942 | |
943 | return rc; | |
1da177e4 LT |
944 | } |
945 | ||
1da177e4 LT |
946 | ssize_t __jfs_getxattr(struct inode *inode, const char *name, void *data, |
947 | size_t buf_size) | |
948 | { | |
949 | struct jfs_ea_list *ealist; | |
950 | struct jfs_ea *ea; | |
951 | struct ea_buffer ea_buf; | |
952 | int xattr_size; | |
953 | ssize_t size; | |
954 | int namelen = strlen(name); | |
955 | char *os2name = NULL; | |
1da177e4 LT |
956 | char *value; |
957 | ||
1da177e4 LT |
958 | if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { |
959 | os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1, | |
960 | GFP_KERNEL); | |
961 | if (!os2name) | |
962 | return -ENOMEM; | |
963 | strcpy(os2name, name + XATTR_OS2_PREFIX_LEN); | |
964 | name = os2name; | |
965 | namelen -= XATTR_OS2_PREFIX_LEN; | |
966 | } | |
967 | ||
968 | down_read(&JFS_IP(inode)->xattr_sem); | |
969 | ||
970 | xattr_size = ea_get(inode, &ea_buf, 0); | |
971 | ||
972 | if (xattr_size < 0) { | |
973 | size = xattr_size; | |
974 | goto out; | |
975 | } | |
976 | ||
977 | if (xattr_size == 0) | |
978 | goto not_found; | |
979 | ||
980 | ealist = (struct jfs_ea_list *) ea_buf.xattr; | |
981 | ||
982 | /* Find the named attribute */ | |
983 | for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) | |
984 | if ((namelen == ea->namelen) && | |
985 | memcmp(name, ea->name, namelen) == 0) { | |
986 | /* Found it */ | |
987 | size = le16_to_cpu(ea->valuelen); | |
988 | if (!data) | |
989 | goto release; | |
990 | else if (size > buf_size) { | |
991 | size = -ERANGE; | |
992 | goto release; | |
993 | } | |
994 | value = ((char *) &ea->name) + ea->namelen + 1; | |
995 | memcpy(data, value, size); | |
996 | goto release; | |
997 | } | |
998 | not_found: | |
999 | size = -ENODATA; | |
1000 | release: | |
1001 | ea_release(inode, &ea_buf); | |
1002 | out: | |
1003 | up_read(&JFS_IP(inode)->xattr_sem); | |
1004 | ||
259692bd | 1005 | kfree(os2name); |
1da177e4 LT |
1006 | |
1007 | return size; | |
1008 | } | |
1009 | ||
1010 | ssize_t jfs_getxattr(struct dentry *dentry, const char *name, void *data, | |
1011 | size_t buf_size) | |
1012 | { | |
1013 | int err; | |
1014 | ||
1015 | err = __jfs_getxattr(dentry->d_inode, name, data, buf_size); | |
1016 | ||
1017 | return err; | |
1018 | } | |
1019 | ||
1020 | /* | |
1021 | * No special permissions are needed to list attributes except for trusted.* | |
1022 | */ | |
1023 | static inline int can_list(struct jfs_ea *ea) | |
1024 | { | |
1025 | return (strncmp(ea->name, XATTR_TRUSTED_PREFIX, | |
1026 | XATTR_TRUSTED_PREFIX_LEN) || | |
1027 | capable(CAP_SYS_ADMIN)); | |
1028 | } | |
1029 | ||
1030 | ssize_t jfs_listxattr(struct dentry * dentry, char *data, size_t buf_size) | |
1031 | { | |
1032 | struct inode *inode = dentry->d_inode; | |
1033 | char *buffer; | |
1034 | ssize_t size = 0; | |
1035 | int xattr_size; | |
1036 | struct jfs_ea_list *ealist; | |
1037 | struct jfs_ea *ea; | |
1038 | struct ea_buffer ea_buf; | |
1039 | ||
1040 | down_read(&JFS_IP(inode)->xattr_sem); | |
1041 | ||
1042 | xattr_size = ea_get(inode, &ea_buf, 0); | |
1043 | if (xattr_size < 0) { | |
1044 | size = xattr_size; | |
1045 | goto out; | |
1046 | } | |
1047 | ||
1048 | if (xattr_size == 0) | |
1049 | goto release; | |
1050 | ||
1051 | ealist = (struct jfs_ea_list *) ea_buf.xattr; | |
1052 | ||
1053 | /* compute required size of list */ | |
1054 | for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) { | |
63f83c9f | 1055 | if (can_list(ea)) |
1da177e4 LT |
1056 | size += name_size(ea) + 1; |
1057 | } | |
1058 | ||
1059 | if (!data) | |
1060 | goto release; | |
1061 | ||
1062 | if (size > buf_size) { | |
1063 | size = -ERANGE; | |
1064 | goto release; | |
1065 | } | |
1066 | ||
1067 | /* Copy attribute names to buffer */ | |
1068 | buffer = data; | |
1069 | for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) { | |
63f83c9f | 1070 | if (can_list(ea)) { |
1da177e4 LT |
1071 | int namelen = copy_name(buffer, ea); |
1072 | buffer += namelen + 1; | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | release: | |
1077 | ea_release(inode, &ea_buf); | |
1078 | out: | |
1079 | up_read(&JFS_IP(inode)->xattr_sem); | |
1080 | return size; | |
1081 | } | |
1082 | ||
1083 | int jfs_removexattr(struct dentry *dentry, const char *name) | |
1084 | { | |
4f4b401b DK |
1085 | struct inode *inode = dentry->d_inode; |
1086 | struct jfs_inode_info *ji = JFS_IP(inode); | |
1087 | int rc; | |
1088 | tid_t tid; | |
1089 | ||
1090 | if ((rc = can_set_xattr(inode, name, NULL, 0))) | |
1091 | return rc; | |
1092 | ||
1093 | tid = txBegin(inode->i_sb, 0); | |
1de87444 | 1094 | mutex_lock(&ji->commit_mutex); |
4f4b401b DK |
1095 | rc = __jfs_setxattr(tid, dentry->d_inode, name, NULL, 0, XATTR_REPLACE); |
1096 | if (!rc) | |
1097 | rc = txCommit(tid, 1, &inode, 0); | |
1098 | txEnd(tid); | |
1de87444 | 1099 | mutex_unlock(&ji->commit_mutex); |
4f4b401b DK |
1100 | |
1101 | return rc; | |
1da177e4 | 1102 | } |
1d15b10f DK |
1103 | |
1104 | #ifdef CONFIG_JFS_SECURITY | |
1105 | int jfs_init_security(tid_t tid, struct inode *inode, struct inode *dir) | |
1106 | { | |
1107 | int rc; | |
1108 | size_t len; | |
1109 | void *value; | |
1110 | char *suffix; | |
1111 | char *name; | |
1112 | ||
1113 | rc = security_inode_init_security(inode, dir, &suffix, &value, &len); | |
1114 | if (rc) { | |
1115 | if (rc == -EOPNOTSUPP) | |
1116 | return 0; | |
1117 | return rc; | |
1118 | } | |
1119 | name = kmalloc(XATTR_SECURITY_PREFIX_LEN + 1 + strlen(suffix), | |
1120 | GFP_NOFS); | |
1121 | if (!name) { | |
1122 | rc = -ENOMEM; | |
1123 | goto kmalloc_failed; | |
1124 | } | |
1125 | strcpy(name, XATTR_SECURITY_PREFIX); | |
1126 | strcpy(name + XATTR_SECURITY_PREFIX_LEN, suffix); | |
1127 | ||
1128 | rc = __jfs_setxattr(tid, inode, name, value, len, 0); | |
1129 | ||
1130 | kfree(name); | |
1131 | kmalloc_failed: | |
1132 | kfree(suffix); | |
1133 | kfree(value); | |
1134 | ||
1135 | return rc; | |
1136 | } | |
1137 | #endif |