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