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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
4 | * | |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
7 | * of the GNU General Public License v.2. | |
8 | */ | |
9 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/posix_acl.h> | |
16 | #include <linux/sort.h> | |
17 | #include <asm/semaphore.h> | |
18 | ||
19 | #include "gfs2.h" | |
20 | #include "acl.h" | |
21 | #include "bmap.h" | |
22 | #include "dir.h" | |
23 | #include "eattr.h" | |
24 | #include "glock.h" | |
25 | #include "glops.h" | |
26 | #include "inode.h" | |
27 | #include "log.h" | |
28 | #include "meta_io.h" | |
29 | #include "ops_address.h" | |
30 | #include "ops_file.h" | |
31 | #include "ops_inode.h" | |
32 | #include "quota.h" | |
33 | #include "rgrp.h" | |
34 | #include "trans.h" | |
35 | #include "unlinked.h" | |
36 | ||
37 | /** | |
38 | * inode_attr_in - Copy attributes from the dinode into the VFS inode | |
39 | * @ip: The GFS2 inode (with embedded disk inode data) | |
40 | * @inode: The Linux VFS inode | |
41 | * | |
42 | */ | |
43 | ||
44 | static void inode_attr_in(struct gfs2_inode *ip, struct inode *inode) | |
45 | { | |
46 | inode->i_ino = ip->i_num.no_formal_ino; | |
47 | ||
48 | switch (ip->i_di.di_mode & S_IFMT) { | |
49 | case S_IFBLK: | |
50 | case S_IFCHR: | |
51 | inode->i_rdev = MKDEV(ip->i_di.di_major, ip->i_di.di_minor); | |
52 | break; | |
53 | default: | |
54 | inode->i_rdev = 0; | |
55 | break; | |
56 | }; | |
57 | ||
58 | inode->i_mode = ip->i_di.di_mode; | |
59 | inode->i_nlink = ip->i_di.di_nlink; | |
60 | inode->i_uid = ip->i_di.di_uid; | |
61 | inode->i_gid = ip->i_di.di_gid; | |
62 | i_size_write(inode, ip->i_di.di_size); | |
63 | inode->i_atime.tv_sec = ip->i_di.di_atime; | |
64 | inode->i_mtime.tv_sec = ip->i_di.di_mtime; | |
65 | inode->i_ctime.tv_sec = ip->i_di.di_ctime; | |
66 | inode->i_atime.tv_nsec = 0; | |
67 | inode->i_mtime.tv_nsec = 0; | |
68 | inode->i_ctime.tv_nsec = 0; | |
69 | inode->i_blksize = PAGE_SIZE; | |
70 | inode->i_blocks = ip->i_di.di_blocks << | |
71 | (ip->i_sbd->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); | |
72 | ||
73 | if (ip->i_di.di_flags & GFS2_DIF_IMMUTABLE) | |
74 | inode->i_flags |= S_IMMUTABLE; | |
75 | else | |
76 | inode->i_flags &= ~S_IMMUTABLE; | |
77 | ||
78 | if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) | |
79 | inode->i_flags |= S_APPEND; | |
80 | else | |
81 | inode->i_flags &= ~S_APPEND; | |
82 | } | |
83 | ||
84 | /** | |
85 | * gfs2_inode_attr_in - Copy attributes from the dinode into the VFS inode | |
86 | * @ip: The GFS2 inode (with embedded disk inode data) | |
87 | * | |
88 | */ | |
89 | ||
90 | void gfs2_inode_attr_in(struct gfs2_inode *ip) | |
91 | { | |
92 | struct inode *inode; | |
93 | ||
94 | inode = gfs2_ip2v_lookup(ip); | |
95 | if (inode) { | |
96 | inode_attr_in(ip, inode); | |
97 | iput(inode); | |
98 | } | |
99 | } | |
100 | ||
101 | /** | |
102 | * gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode | |
103 | * @ip: The GFS2 inode | |
104 | * | |
105 | * Only copy out the attributes that we want the VFS layer | |
106 | * to be able to modify. | |
107 | */ | |
108 | ||
109 | void gfs2_inode_attr_out(struct gfs2_inode *ip) | |
110 | { | |
111 | struct inode *inode = ip->i_vnode; | |
112 | ||
113 | gfs2_assert_withdraw(ip->i_sbd, | |
114 | (ip->i_di.di_mode & S_IFMT) == (inode->i_mode & S_IFMT)); | |
115 | ip->i_di.di_mode = inode->i_mode; | |
116 | ip->i_di.di_uid = inode->i_uid; | |
117 | ip->i_di.di_gid = inode->i_gid; | |
118 | ip->i_di.di_atime = inode->i_atime.tv_sec; | |
119 | ip->i_di.di_mtime = inode->i_mtime.tv_sec; | |
120 | ip->i_di.di_ctime = inode->i_ctime.tv_sec; | |
121 | } | |
122 | ||
123 | /** | |
124 | * gfs2_ip2v_lookup - Get the struct inode for a struct gfs2_inode | |
125 | * @ip: the struct gfs2_inode to get the struct inode for | |
126 | * | |
127 | * Returns: A VFS inode, or NULL if none | |
128 | */ | |
129 | ||
130 | struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip) | |
131 | { | |
132 | struct inode *inode = NULL; | |
133 | ||
134 | gfs2_assert_warn(ip->i_sbd, test_bit(GIF_MIN_INIT, &ip->i_flags)); | |
135 | ||
136 | spin_lock(&ip->i_spin); | |
137 | if (ip->i_vnode) | |
138 | inode = igrab(ip->i_vnode); | |
139 | spin_unlock(&ip->i_spin); | |
140 | ||
141 | return inode; | |
142 | } | |
143 | ||
144 | /** | |
145 | * gfs2_ip2v - Get/Create a struct inode for a struct gfs2_inode | |
146 | * @ip: the struct gfs2_inode to get the struct inode for | |
147 | * | |
148 | * Returns: A VFS inode, or NULL if no mem | |
149 | */ | |
150 | ||
151 | struct inode *gfs2_ip2v(struct gfs2_inode *ip) | |
152 | { | |
153 | struct inode *inode, *tmp; | |
154 | ||
155 | inode = gfs2_ip2v_lookup(ip); | |
156 | if (inode) | |
157 | return inode; | |
158 | ||
159 | tmp = new_inode(ip->i_sbd->sd_vfs); | |
160 | if (!tmp) | |
161 | return NULL; | |
162 | ||
163 | inode_attr_in(ip, tmp); | |
164 | ||
165 | if (S_ISREG(ip->i_di.di_mode)) { | |
166 | tmp->i_op = &gfs2_file_iops; | |
167 | tmp->i_fop = &gfs2_file_fops; | |
168 | tmp->i_mapping->a_ops = &gfs2_file_aops; | |
169 | } else if (S_ISDIR(ip->i_di.di_mode)) { | |
170 | tmp->i_op = &gfs2_dir_iops; | |
171 | tmp->i_fop = &gfs2_dir_fops; | |
172 | } else if (S_ISLNK(ip->i_di.di_mode)) { | |
173 | tmp->i_op = &gfs2_symlink_iops; | |
174 | } else { | |
175 | tmp->i_op = &gfs2_dev_iops; | |
176 | init_special_inode(tmp, tmp->i_mode, tmp->i_rdev); | |
177 | } | |
178 | ||
179 | set_v2ip(tmp, NULL); | |
180 | ||
181 | for (;;) { | |
182 | spin_lock(&ip->i_spin); | |
183 | if (!ip->i_vnode) | |
184 | break; | |
185 | inode = igrab(ip->i_vnode); | |
186 | spin_unlock(&ip->i_spin); | |
187 | ||
188 | if (inode) { | |
189 | iput(tmp); | |
190 | return inode; | |
191 | } | |
192 | yield(); | |
193 | } | |
194 | ||
195 | inode = tmp; | |
196 | ||
197 | gfs2_inode_hold(ip); | |
198 | ip->i_vnode = inode; | |
199 | set_v2ip(inode, ip); | |
200 | ||
201 | spin_unlock(&ip->i_spin); | |
202 | ||
203 | insert_inode_hash(inode); | |
204 | ||
205 | return inode; | |
206 | } | |
207 | ||
208 | static int iget_test(struct inode *inode, void *opaque) | |
209 | { | |
210 | struct gfs2_inode *ip = get_v2ip(inode); | |
211 | struct gfs2_inum *inum = (struct gfs2_inum *)opaque; | |
212 | ||
213 | if (ip && ip->i_num.no_addr == inum->no_addr) | |
214 | return 1; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum) | |
220 | { | |
221 | return ilookup5(sb, (unsigned long)inum->no_formal_ino, | |
222 | iget_test, inum); | |
223 | } | |
224 | ||
225 | void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type) | |
226 | { | |
227 | spin_lock(&ip->i_spin); | |
228 | if (!test_and_set_bit(GIF_MIN_INIT, &ip->i_flags)) { | |
229 | ip->i_di.di_nlink = 1; | |
230 | ip->i_di.di_mode = DT2IF(type); | |
231 | } | |
232 | spin_unlock(&ip->i_spin); | |
233 | } | |
234 | ||
235 | /** | |
236 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
237 | * @ip: The GFS2 inode | |
238 | * | |
239 | * Returns: errno | |
240 | */ | |
241 | ||
242 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
243 | { | |
244 | struct buffer_head *dibh; | |
245 | int error; | |
246 | ||
247 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
248 | if (error) | |
249 | return error; | |
250 | ||
251 | if (gfs2_metatype_check(ip->i_sbd, dibh, GFS2_METATYPE_DI)) { | |
252 | brelse(dibh); | |
253 | return -EIO; | |
254 | } | |
255 | ||
256 | spin_lock(&ip->i_spin); | |
257 | gfs2_dinode_in(&ip->i_di, dibh->b_data); | |
258 | set_bit(GIF_MIN_INIT, &ip->i_flags); | |
259 | spin_unlock(&ip->i_spin); | |
260 | ||
261 | brelse(dibh); | |
262 | ||
263 | if (ip->i_num.no_addr != ip->i_di.di_num.no_addr) { | |
264 | if (gfs2_consist_inode(ip)) | |
265 | gfs2_dinode_print(&ip->i_di); | |
266 | return -EIO; | |
267 | } | |
268 | if (ip->i_num.no_formal_ino != ip->i_di.di_num.no_formal_ino) | |
269 | return -ESTALE; | |
270 | ||
271 | ip->i_vn = ip->i_gl->gl_vn; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | /** | |
277 | * inode_create - create a struct gfs2_inode | |
278 | * @i_gl: The glock covering the inode | |
279 | * @inum: The inode number | |
280 | * @io_gl: the iopen glock to acquire/hold (using holder in new gfs2_inode) | |
281 | * @io_state: the state the iopen glock should be acquired in | |
282 | * @ipp: pointer to put the returned inode in | |
283 | * | |
284 | * Returns: errno | |
285 | */ | |
286 | ||
287 | static int inode_create(struct gfs2_glock *i_gl, struct gfs2_inum *inum, | |
288 | struct gfs2_glock *io_gl, unsigned int io_state, | |
289 | struct gfs2_inode **ipp) | |
290 | { | |
291 | struct gfs2_sbd *sdp = i_gl->gl_sbd; | |
292 | struct gfs2_inode *ip; | |
293 | int error = 0; | |
294 | ||
295 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
296 | if (!ip) | |
297 | return -ENOMEM; | |
298 | memset(ip, 0, sizeof(struct gfs2_inode)); | |
299 | ||
300 | ip->i_num = *inum; | |
301 | ||
302 | atomic_set(&ip->i_count, 1); | |
303 | ||
304 | ip->i_vn = i_gl->gl_vn - 1; | |
305 | ||
306 | ip->i_gl = i_gl; | |
307 | ip->i_sbd = sdp; | |
308 | ||
309 | spin_lock_init(&ip->i_spin); | |
310 | init_rwsem(&ip->i_rw_mutex); | |
311 | ||
312 | ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default); | |
313 | ||
314 | error = gfs2_glock_nq_init(io_gl, | |
315 | io_state, GL_LOCAL_EXCL | GL_EXACT, | |
316 | &ip->i_iopen_gh); | |
317 | if (error) | |
318 | goto fail; | |
319 | ip->i_iopen_gh.gh_owner = NULL; | |
320 | ||
321 | spin_lock(&io_gl->gl_spin); | |
322 | gfs2_glock_hold(i_gl); | |
323 | set_gl2gl(io_gl, i_gl); | |
324 | spin_unlock(&io_gl->gl_spin); | |
325 | ||
326 | gfs2_glock_hold(i_gl); | |
327 | set_gl2ip(i_gl, ip); | |
328 | ||
329 | atomic_inc(&sdp->sd_inode_count); | |
330 | ||
331 | *ipp = ip; | |
332 | ||
333 | return 0; | |
334 | ||
335 | fail: | |
336 | gfs2_meta_cache_flush(ip); | |
337 | kmem_cache_free(gfs2_inode_cachep, ip); | |
338 | *ipp = NULL; | |
339 | ||
340 | return error; | |
341 | } | |
342 | ||
343 | /** | |
344 | * gfs2_inode_get - Create or get a reference on an inode | |
345 | * @i_gl: The glock covering the inode | |
346 | * @inum: The inode number | |
347 | * @create: | |
348 | * @ipp: pointer to put the returned inode in | |
349 | * | |
350 | * Returns: errno | |
351 | */ | |
352 | ||
353 | int gfs2_inode_get(struct gfs2_glock *i_gl, struct gfs2_inum *inum, int create, | |
354 | struct gfs2_inode **ipp) | |
355 | { | |
356 | struct gfs2_sbd *sdp = i_gl->gl_sbd; | |
357 | struct gfs2_glock *io_gl; | |
358 | int error = 0; | |
359 | ||
360 | gfs2_glmutex_lock(i_gl); | |
361 | ||
362 | *ipp = get_gl2ip(i_gl); | |
363 | if (*ipp) { | |
364 | error = -ESTALE; | |
365 | if ((*ipp)->i_num.no_formal_ino != inum->no_formal_ino) | |
366 | goto out; | |
367 | atomic_inc(&(*ipp)->i_count); | |
368 | error = 0; | |
369 | goto out; | |
370 | } | |
371 | ||
372 | if (!create) | |
373 | goto out; | |
374 | ||
375 | error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, | |
376 | CREATE, &io_gl); | |
377 | if (!error) { | |
378 | error = inode_create(i_gl, inum, io_gl, LM_ST_SHARED, ipp); | |
379 | gfs2_glock_put(io_gl); | |
380 | } | |
381 | ||
382 | out: | |
383 | gfs2_glmutex_unlock(i_gl); | |
384 | ||
385 | return error; | |
386 | } | |
387 | ||
388 | void gfs2_inode_hold(struct gfs2_inode *ip) | |
389 | { | |
390 | gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0); | |
391 | atomic_inc(&ip->i_count); | |
392 | } | |
393 | ||
394 | void gfs2_inode_put(struct gfs2_inode *ip) | |
395 | { | |
396 | gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0); | |
397 | atomic_dec(&ip->i_count); | |
398 | } | |
399 | ||
400 | void gfs2_inode_destroy(struct gfs2_inode *ip) | |
401 | { | |
402 | struct gfs2_sbd *sdp = ip->i_sbd; | |
403 | struct gfs2_glock *io_gl = ip->i_iopen_gh.gh_gl; | |
404 | struct gfs2_glock *i_gl = ip->i_gl; | |
405 | ||
406 | gfs2_assert_warn(sdp, !atomic_read(&ip->i_count)); | |
407 | gfs2_assert(sdp, get_gl2gl(io_gl) == i_gl); | |
408 | ||
409 | spin_lock(&io_gl->gl_spin); | |
410 | set_gl2gl(io_gl, NULL); | |
411 | gfs2_glock_put(i_gl); | |
412 | spin_unlock(&io_gl->gl_spin); | |
413 | ||
414 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
415 | ||
416 | gfs2_meta_cache_flush(ip); | |
417 | kmem_cache_free(gfs2_inode_cachep, ip); | |
418 | ||
419 | set_gl2ip(i_gl, NULL); | |
420 | gfs2_glock_put(i_gl); | |
421 | ||
422 | atomic_dec(&sdp->sd_inode_count); | |
423 | } | |
424 | ||
425 | static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
426 | { | |
427 | struct gfs2_sbd *sdp = ip->i_sbd; | |
428 | struct gfs2_alloc *al; | |
429 | struct gfs2_rgrpd *rgd; | |
430 | int error; | |
431 | ||
432 | if (ip->i_di.di_blocks != 1) { | |
433 | if (gfs2_consist_inode(ip)) | |
434 | gfs2_dinode_print(&ip->i_di); | |
435 | return -EIO; | |
436 | } | |
437 | ||
438 | al = gfs2_alloc_get(ip); | |
439 | ||
440 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
441 | if (error) | |
442 | goto out; | |
443 | ||
444 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
445 | if (error) | |
446 | goto out_qs; | |
447 | ||
448 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); | |
449 | if (!rgd) { | |
450 | gfs2_consist_inode(ip); | |
451 | error = -EIO; | |
452 | goto out_rindex_relse; | |
453 | } | |
454 | ||
455 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
456 | &al->al_rgd_gh); | |
457 | if (error) | |
458 | goto out_rindex_relse; | |
459 | ||
460 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED + | |
461 | RES_STATFS + RES_QUOTA, 1); | |
462 | if (error) | |
463 | goto out_rg_gunlock; | |
464 | ||
465 | gfs2_trans_add_gl(ip->i_gl); | |
466 | ||
467 | gfs2_free_di(rgd, ip); | |
468 | ||
469 | error = gfs2_unlinked_ondisk_rm(sdp, ul); | |
470 | ||
471 | gfs2_trans_end(sdp); | |
472 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
473 | ||
474 | out_rg_gunlock: | |
475 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
476 | ||
477 | out_rindex_relse: | |
478 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
479 | ||
480 | out_qs: | |
481 | gfs2_quota_unhold(ip); | |
482 | ||
483 | out: | |
484 | gfs2_alloc_put(ip); | |
485 | ||
486 | return error; | |
487 | } | |
488 | ||
489 | /** | |
490 | * inode_dealloc - Deallocate all on-disk blocks for an inode (dinode) | |
491 | * @sdp: the filesystem | |
492 | * @inum: the inode number to deallocate | |
493 | * @io_gh: a holder for the iopen glock for this inode | |
494 | * | |
495 | * Returns: errno | |
496 | */ | |
497 | ||
498 | static int inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul, | |
499 | struct gfs2_holder *io_gh) | |
500 | { | |
501 | struct gfs2_inode *ip; | |
502 | struct gfs2_holder i_gh; | |
503 | int error; | |
504 | ||
505 | error = gfs2_glock_nq_num(sdp, | |
506 | ul->ul_ut.ut_inum.no_addr, &gfs2_inode_glops, | |
507 | LM_ST_EXCLUSIVE, 0, &i_gh); | |
508 | if (error) | |
509 | return error; | |
510 | ||
511 | /* We reacquire the iopen lock here to avoid a race with the NFS server | |
512 | calling gfs2_read_inode() with the inode number of a inode we're in | |
513 | the process of deallocating. And we can't keep our hold on the lock | |
514 | from inode_dealloc_init() for deadlock reasons. */ | |
515 | ||
516 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY, io_gh); | |
517 | error = gfs2_glock_nq(io_gh); | |
518 | switch (error) { | |
519 | case 0: | |
520 | break; | |
521 | case GLR_TRYFAILED: | |
522 | error = 1; | |
523 | default: | |
524 | goto out; | |
525 | } | |
526 | ||
527 | gfs2_assert_warn(sdp, !get_gl2ip(i_gh.gh_gl)); | |
528 | error = inode_create(i_gh.gh_gl, &ul->ul_ut.ut_inum, io_gh->gh_gl, | |
529 | LM_ST_EXCLUSIVE, &ip); | |
530 | ||
531 | gfs2_glock_dq(io_gh); | |
532 | ||
533 | if (error) | |
534 | goto out; | |
535 | ||
536 | error = gfs2_inode_refresh(ip); | |
537 | if (error) | |
538 | goto out_iput; | |
539 | ||
540 | if (ip->i_di.di_nlink) { | |
541 | if (gfs2_consist_inode(ip)) | |
542 | gfs2_dinode_print(&ip->i_di); | |
543 | error = -EIO; | |
544 | goto out_iput; | |
545 | } | |
546 | ||
547 | if (S_ISDIR(ip->i_di.di_mode) && | |
548 | (ip->i_di.di_flags & GFS2_DIF_EXHASH)) { | |
549 | error = gfs2_dir_exhash_dealloc(ip); | |
550 | if (error) | |
551 | goto out_iput; | |
552 | } | |
553 | ||
554 | if (ip->i_di.di_eattr) { | |
555 | error = gfs2_ea_dealloc(ip); | |
556 | if (error) | |
557 | goto out_iput; | |
558 | } | |
559 | ||
560 | if (!gfs2_is_stuffed(ip)) { | |
561 | error = gfs2_file_dealloc(ip); | |
562 | if (error) | |
563 | goto out_iput; | |
564 | } | |
565 | ||
566 | error = dinode_dealloc(ip, ul); | |
567 | if (error) | |
568 | goto out_iput; | |
569 | ||
570 | out_iput: | |
571 | gfs2_glmutex_lock(i_gh.gh_gl); | |
572 | gfs2_inode_put(ip); | |
573 | gfs2_inode_destroy(ip); | |
574 | gfs2_glmutex_unlock(i_gh.gh_gl); | |
575 | ||
576 | out: | |
577 | gfs2_glock_dq_uninit(&i_gh); | |
578 | ||
579 | return error; | |
580 | } | |
581 | ||
582 | /** | |
583 | * try_inode_dealloc - Try to deallocate an inode and all its blocks | |
584 | * @sdp: the filesystem | |
585 | * | |
586 | * Returns: 0 on success, -errno on error, 1 on busy (inode open) | |
587 | */ | |
588 | ||
589 | static int try_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul) | |
590 | { | |
591 | struct gfs2_holder io_gh; | |
592 | int error = 0; | |
593 | ||
594 | gfs2_try_toss_inode(sdp, &ul->ul_ut.ut_inum); | |
595 | ||
596 | error = gfs2_glock_nq_num(sdp, | |
597 | ul->ul_ut.ut_inum.no_addr, &gfs2_iopen_glops, | |
598 | LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB, &io_gh); | |
599 | switch (error) { | |
600 | case 0: | |
601 | break; | |
602 | case GLR_TRYFAILED: | |
603 | return 1; | |
604 | default: | |
605 | return error; | |
606 | } | |
607 | ||
608 | gfs2_glock_dq(&io_gh); | |
609 | error = inode_dealloc(sdp, ul, &io_gh); | |
610 | gfs2_holder_uninit(&io_gh); | |
611 | ||
612 | return error; | |
613 | } | |
614 | ||
615 | static int inode_dealloc_uninit(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul) | |
616 | { | |
617 | struct gfs2_rgrpd *rgd; | |
618 | struct gfs2_holder ri_gh, rgd_gh; | |
619 | int error; | |
620 | ||
621 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
622 | if (error) | |
623 | return error; | |
624 | ||
625 | rgd = gfs2_blk2rgrpd(sdp, ul->ul_ut.ut_inum.no_addr); | |
626 | if (!rgd) { | |
627 | gfs2_consist(sdp); | |
628 | error = -EIO; | |
629 | goto out; | |
630 | } | |
631 | ||
632 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rgd_gh); | |
633 | if (error) | |
634 | goto out; | |
635 | ||
636 | error = gfs2_trans_begin(sdp, | |
637 | RES_RG_BIT + RES_UNLINKED + RES_STATFS, | |
638 | 0); | |
639 | if (error) | |
640 | goto out_gunlock; | |
641 | ||
642 | gfs2_free_uninit_di(rgd, ul->ul_ut.ut_inum.no_addr); | |
643 | gfs2_unlinked_ondisk_rm(sdp, ul); | |
644 | ||
645 | gfs2_trans_end(sdp); | |
646 | ||
647 | out_gunlock: | |
648 | gfs2_glock_dq_uninit(&rgd_gh); | |
649 | out: | |
650 | gfs2_glock_dq_uninit(&ri_gh); | |
651 | ||
652 | return error; | |
653 | } | |
654 | ||
655 | int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul) | |
656 | { | |
657 | if (ul->ul_ut.ut_flags & GFS2_UTF_UNINIT) | |
658 | return inode_dealloc_uninit(sdp, ul); | |
659 | else | |
660 | return try_inode_dealloc(sdp, ul); | |
661 | } | |
662 | ||
663 | /** | |
664 | * gfs2_change_nlink - Change nlink count on inode | |
665 | * @ip: The GFS2 inode | |
666 | * @diff: The change in the nlink count required | |
667 | * | |
668 | * Returns: errno | |
669 | */ | |
670 | ||
671 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) | |
672 | { | |
673 | struct buffer_head *dibh; | |
674 | uint32_t nlink; | |
675 | int error; | |
676 | ||
677 | nlink = ip->i_di.di_nlink + diff; | |
678 | ||
679 | /* If we are reducing the nlink count, but the new value ends up being | |
680 | bigger than the old one, we must have underflowed. */ | |
681 | if (diff < 0 && nlink > ip->i_di.di_nlink) { | |
682 | if (gfs2_consist_inode(ip)) | |
683 | gfs2_dinode_print(&ip->i_di); | |
684 | return -EIO; | |
685 | } | |
686 | ||
687 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
688 | if (error) | |
689 | return error; | |
690 | ||
691 | ip->i_di.di_nlink = nlink; | |
692 | ip->i_di.di_ctime = get_seconds(); | |
693 | ||
694 | gfs2_trans_add_bh(ip->i_gl, dibh); | |
695 | gfs2_dinode_out(&ip->i_di, dibh->b_data); | |
696 | brelse(dibh); | |
697 | ||
698 | return 0; | |
699 | } | |
700 | ||
701 | /** | |
702 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
703 | * @d_gh: An initialized holder for the directory glock | |
704 | * @name: The name of the inode to look for | |
705 | * @is_root: If 1, ignore the caller's permissions | |
706 | * @i_gh: An uninitialized holder for the new inode glock | |
707 | * | |
708 | * There will always be a vnode (Linux VFS inode) for the d_gh inode unless | |
709 | * @is_root is true. | |
710 | * | |
711 | * Returns: errno | |
712 | */ | |
713 | ||
714 | int gfs2_lookupi(struct gfs2_inode *dip, struct qstr *name, int is_root, | |
715 | struct gfs2_inode **ipp) | |
716 | { | |
717 | struct gfs2_sbd *sdp = dip->i_sbd; | |
718 | struct gfs2_holder d_gh; | |
719 | struct gfs2_inum inum; | |
720 | unsigned int type; | |
721 | struct gfs2_glock *gl; | |
722 | int error; | |
723 | ||
724 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
725 | return -ENAMETOOLONG; | |
726 | ||
727 | if (gfs2_filecmp(name, ".", 1) || | |
728 | (gfs2_filecmp(name, "..", 2) && dip == sdp->sd_root_dir)) { | |
729 | gfs2_inode_hold(dip); | |
730 | *ipp = dip; | |
731 | return 0; | |
732 | } | |
733 | ||
734 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
735 | if (error) | |
736 | return error; | |
737 | ||
738 | if (!is_root) { | |
739 | error = gfs2_repermission(dip->i_vnode, MAY_EXEC, NULL); | |
740 | if (error) | |
741 | goto out; | |
742 | } | |
743 | ||
744 | error = gfs2_dir_search(dip, name, &inum, &type); | |
745 | if (error) | |
746 | goto out; | |
747 | ||
748 | error = gfs2_glock_get(sdp, inum.no_addr, &gfs2_inode_glops, | |
749 | CREATE, &gl); | |
750 | if (error) | |
751 | goto out; | |
752 | ||
753 | error = gfs2_inode_get(gl, &inum, CREATE, ipp); | |
754 | if (!error) | |
755 | gfs2_inode_min_init(*ipp, type); | |
756 | ||
757 | gfs2_glock_put(gl); | |
758 | ||
759 | out: | |
760 | gfs2_glock_dq_uninit(&d_gh); | |
761 | ||
762 | return error; | |
763 | } | |
764 | ||
765 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino) | |
766 | { | |
767 | struct gfs2_inode *ip = sdp->sd_ir_inode; | |
768 | struct buffer_head *bh; | |
769 | struct gfs2_inum_range ir; | |
770 | int error; | |
771 | ||
772 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
773 | if (error) | |
774 | return error; | |
775 | down(&sdp->sd_inum_mutex); | |
776 | ||
777 | error = gfs2_meta_inode_buffer(ip, &bh); | |
778 | if (error) { | |
779 | up(&sdp->sd_inum_mutex); | |
780 | gfs2_trans_end(sdp); | |
781 | return error; | |
782 | } | |
783 | ||
784 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
785 | ||
786 | if (ir.ir_length) { | |
787 | *formal_ino = ir.ir_start++; | |
788 | ir.ir_length--; | |
789 | gfs2_trans_add_bh(ip->i_gl, bh); | |
790 | gfs2_inum_range_out(&ir, | |
791 | bh->b_data + sizeof(struct gfs2_dinode)); | |
792 | brelse(bh); | |
793 | up(&sdp->sd_inum_mutex); | |
794 | gfs2_trans_end(sdp); | |
795 | return 0; | |
796 | } | |
797 | ||
798 | brelse(bh); | |
799 | ||
800 | up(&sdp->sd_inum_mutex); | |
801 | gfs2_trans_end(sdp); | |
802 | ||
803 | return 1; | |
804 | } | |
805 | ||
806 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino) | |
807 | { | |
808 | struct gfs2_inode *ip = sdp->sd_ir_inode; | |
809 | struct gfs2_inode *m_ip = sdp->sd_inum_inode; | |
810 | struct gfs2_holder gh; | |
811 | struct buffer_head *bh; | |
812 | struct gfs2_inum_range ir; | |
813 | int error; | |
814 | ||
815 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
816 | if (error) | |
817 | return error; | |
818 | ||
819 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
820 | if (error) | |
821 | goto out; | |
822 | down(&sdp->sd_inum_mutex); | |
823 | ||
824 | error = gfs2_meta_inode_buffer(ip, &bh); | |
825 | if (error) | |
826 | goto out_end_trans; | |
827 | ||
828 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
829 | ||
830 | if (!ir.ir_length) { | |
831 | struct buffer_head *m_bh; | |
832 | uint64_t x, y; | |
833 | ||
834 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
835 | if (error) | |
836 | goto out_brelse; | |
837 | ||
838 | x = *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)); | |
839 | x = y = be64_to_cpu(x); | |
840 | ir.ir_start = x; | |
841 | ir.ir_length = GFS2_INUM_QUANTUM; | |
842 | x += GFS2_INUM_QUANTUM; | |
843 | if (x < y) | |
844 | gfs2_consist_inode(m_ip); | |
845 | x = cpu_to_be64(x); | |
846 | gfs2_trans_add_bh(m_ip->i_gl, m_bh); | |
847 | *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = x; | |
848 | ||
849 | brelse(m_bh); | |
850 | } | |
851 | ||
852 | *formal_ino = ir.ir_start++; | |
853 | ir.ir_length--; | |
854 | ||
855 | gfs2_trans_add_bh(ip->i_gl, bh); | |
856 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
857 | ||
858 | out_brelse: | |
859 | brelse(bh); | |
860 | ||
861 | out_end_trans: | |
862 | up(&sdp->sd_inum_mutex); | |
863 | gfs2_trans_end(sdp); | |
864 | ||
865 | out: | |
866 | gfs2_glock_dq_uninit(&gh); | |
867 | ||
868 | return error; | |
869 | } | |
870 | ||
871 | static int pick_formal_ino(struct gfs2_sbd *sdp, uint64_t *inum) | |
872 | { | |
873 | int error; | |
874 | ||
875 | error = pick_formal_ino_1(sdp, inum); | |
876 | if (error <= 0) | |
877 | return error; | |
878 | ||
879 | error = pick_formal_ino_2(sdp, inum); | |
880 | ||
881 | return error; | |
882 | } | |
883 | ||
884 | /** | |
885 | * create_ok - OK to create a new on-disk inode here? | |
886 | * @dip: Directory in which dinode is to be created | |
887 | * @name: Name of new dinode | |
888 | * @mode: | |
889 | * | |
890 | * Returns: errno | |
891 | */ | |
892 | ||
893 | static int create_ok(struct gfs2_inode *dip, struct qstr *name, | |
894 | unsigned int mode) | |
895 | { | |
896 | int error; | |
897 | ||
898 | error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL); | |
899 | if (error) | |
900 | return error; | |
901 | ||
902 | /* Don't create entries in an unlinked directory */ | |
903 | if (!dip->i_di.di_nlink) | |
904 | return -EPERM; | |
905 | ||
906 | error = gfs2_dir_search(dip, name, NULL, NULL); | |
907 | switch (error) { | |
908 | case -ENOENT: | |
909 | error = 0; | |
910 | break; | |
911 | case 0: | |
912 | return -EEXIST; | |
913 | default: | |
914 | return error; | |
915 | } | |
916 | ||
917 | if (dip->i_di.di_entries == (uint32_t)-1) | |
918 | return -EFBIG; | |
919 | if (S_ISDIR(mode) && dip->i_di.di_nlink == (uint32_t)-1) | |
920 | return -EMLINK; | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
926 | unsigned int *uid, unsigned int *gid) | |
927 | { | |
928 | if (dip->i_sbd->sd_args.ar_suiddir && | |
929 | (dip->i_di.di_mode & S_ISUID) && | |
930 | dip->i_di.di_uid) { | |
931 | if (S_ISDIR(*mode)) | |
932 | *mode |= S_ISUID; | |
933 | else if (dip->i_di.di_uid != current->fsuid) | |
934 | *mode &= ~07111; | |
935 | *uid = dip->i_di.di_uid; | |
936 | } else | |
937 | *uid = current->fsuid; | |
938 | ||
939 | if (dip->i_di.di_mode & S_ISGID) { | |
940 | if (S_ISDIR(*mode)) | |
941 | *mode |= S_ISGID; | |
942 | *gid = dip->i_di.di_gid; | |
943 | } else | |
944 | *gid = current->fsgid; | |
945 | } | |
946 | ||
947 | static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_unlinked *ul) | |
948 | { | |
949 | struct gfs2_sbd *sdp = dip->i_sbd; | |
950 | int error; | |
951 | ||
952 | gfs2_alloc_get(dip); | |
953 | ||
954 | dip->i_alloc.al_requested = RES_DINODE; | |
955 | error = gfs2_inplace_reserve(dip); | |
956 | if (error) | |
957 | goto out; | |
958 | ||
959 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED + | |
960 | RES_STATFS, 0); | |
961 | if (error) | |
962 | goto out_ipreserv; | |
963 | ||
964 | ul->ul_ut.ut_inum.no_addr = gfs2_alloc_di(dip); | |
965 | ||
966 | ul->ul_ut.ut_flags = GFS2_UTF_UNINIT; | |
967 | error = gfs2_unlinked_ondisk_add(sdp, ul); | |
968 | ||
969 | gfs2_trans_end(sdp); | |
970 | ||
971 | out_ipreserv: | |
972 | gfs2_inplace_release(dip); | |
973 | ||
974 | out: | |
975 | gfs2_alloc_put(dip); | |
976 | ||
977 | return error; | |
978 | } | |
979 | ||
980 | /** | |
981 | * init_dinode - Fill in a new dinode structure | |
982 | * @dip: the directory this inode is being created in | |
983 | * @gl: The glock covering the new inode | |
984 | * @inum: the inode number | |
985 | * @mode: the file permissions | |
986 | * @uid: | |
987 | * @gid: | |
988 | * | |
989 | */ | |
990 | ||
991 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
992 | struct gfs2_inum *inum, unsigned int mode, | |
993 | unsigned int uid, unsigned int gid) | |
994 | { | |
995 | struct gfs2_sbd *sdp = dip->i_sbd; | |
996 | struct gfs2_dinode di; | |
997 | struct buffer_head *dibh; | |
998 | ||
999 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
1000 | gfs2_trans_add_bh(gl, dibh); | |
1001 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); | |
1002 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
1003 | ||
1004 | memset(&di, 0, sizeof(struct gfs2_dinode)); | |
1005 | gfs2_meta_header_in(&di.di_header, dibh->b_data); | |
1006 | di.di_num = *inum; | |
1007 | di.di_mode = mode; | |
1008 | di.di_uid = uid; | |
1009 | di.di_gid = gid; | |
1010 | di.di_blocks = 1; | |
1011 | di.di_atime = di.di_mtime = di.di_ctime = get_seconds(); | |
1012 | di.di_goal_meta = di.di_goal_data = inum->no_addr; | |
1013 | ||
1014 | if (S_ISREG(mode)) { | |
1015 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
1016 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
1017 | di.di_flags |= GFS2_DIF_JDATA; | |
1018 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || | |
1019 | gfs2_tune_get(sdp, gt_new_files_directio)) | |
1020 | di.di_flags |= GFS2_DIF_DIRECTIO; | |
1021 | } else if (S_ISDIR(mode)) { | |
1022 | di.di_flags |= (dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO); | |
1023 | di.di_flags |= (dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA); | |
1024 | } | |
1025 | ||
1026 | gfs2_dinode_out(&di, dibh->b_data); | |
1027 | brelse(dibh); | |
1028 | } | |
1029 | ||
1030 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
1031 | unsigned int mode, struct gfs2_unlinked *ul) | |
1032 | { | |
1033 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1034 | unsigned int uid, gid; | |
1035 | int error; | |
1036 | ||
1037 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
1038 | ||
1039 | gfs2_alloc_get(dip); | |
1040 | ||
1041 | error = gfs2_quota_lock(dip, uid, gid); | |
1042 | if (error) | |
1043 | goto out; | |
1044 | ||
1045 | error = gfs2_quota_check(dip, uid, gid); | |
1046 | if (error) | |
1047 | goto out_quota; | |
1048 | ||
1049 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_UNLINKED + | |
1050 | RES_QUOTA, 0); | |
1051 | if (error) | |
1052 | goto out_quota; | |
1053 | ||
1054 | ul->ul_ut.ut_flags = 0; | |
1055 | error = gfs2_unlinked_ondisk_munge(sdp, ul); | |
1056 | ||
1057 | init_dinode(dip, gl, &ul->ul_ut.ut_inum, | |
1058 | mode, uid, gid); | |
1059 | ||
1060 | gfs2_quota_change(dip, +1, uid, gid); | |
1061 | ||
1062 | gfs2_trans_end(sdp); | |
1063 | ||
1064 | out_quota: | |
1065 | gfs2_quota_unlock(dip); | |
1066 | ||
1067 | out: | |
1068 | gfs2_alloc_put(dip); | |
1069 | ||
1070 | return error; | |
1071 | } | |
1072 | ||
1073 | static int link_dinode(struct gfs2_inode *dip, struct qstr *name, | |
1074 | struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
1075 | { | |
1076 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1077 | struct gfs2_alloc *al; | |
1078 | int alloc_required; | |
1079 | struct buffer_head *dibh; | |
1080 | int error; | |
1081 | ||
1082 | al = gfs2_alloc_get(dip); | |
1083 | ||
1084 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
1085 | if (error) | |
1086 | goto fail; | |
1087 | ||
1088 | error = gfs2_diradd_alloc_required(dip, name, &alloc_required); | |
1089 | if (alloc_required) { | |
1090 | error = gfs2_quota_check(dip, dip->i_di.di_uid, | |
1091 | dip->i_di.di_gid); | |
1092 | if (error) | |
1093 | goto fail_quota_locks; | |
1094 | ||
1095 | al->al_requested = sdp->sd_max_dirres; | |
1096 | ||
1097 | error = gfs2_inplace_reserve(dip); | |
1098 | if (error) | |
1099 | goto fail_quota_locks; | |
1100 | ||
1101 | error = gfs2_trans_begin(sdp, | |
1102 | sdp->sd_max_dirres + | |
1103 | al->al_rgd->rd_ri.ri_length + | |
1104 | 2 * RES_DINODE + RES_UNLINKED + | |
1105 | RES_STATFS + RES_QUOTA, 0); | |
1106 | if (error) | |
1107 | goto fail_ipreserv; | |
1108 | } else { | |
1109 | error = gfs2_trans_begin(sdp, | |
1110 | RES_LEAF + | |
1111 | 2 * RES_DINODE + | |
1112 | RES_UNLINKED, 0); | |
1113 | if (error) | |
1114 | goto fail_quota_locks; | |
1115 | } | |
1116 | ||
1117 | error = gfs2_dir_add(dip, name, &ip->i_num, IF2DT(ip->i_di.di_mode)); | |
1118 | if (error) | |
1119 | goto fail_end_trans; | |
1120 | ||
1121 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1122 | if (error) | |
1123 | goto fail_end_trans; | |
1124 | ip->i_di.di_nlink = 1; | |
1125 | gfs2_trans_add_bh(ip->i_gl, dibh); | |
1126 | gfs2_dinode_out(&ip->i_di, dibh->b_data); | |
1127 | brelse(dibh); | |
1128 | ||
1129 | error = gfs2_unlinked_ondisk_rm(sdp, ul); | |
1130 | if (error) | |
1131 | goto fail_end_trans; | |
1132 | ||
1133 | return 0; | |
1134 | ||
1135 | fail_end_trans: | |
1136 | gfs2_trans_end(sdp); | |
1137 | ||
1138 | fail_ipreserv: | |
1139 | if (dip->i_alloc.al_rgd) | |
1140 | gfs2_inplace_release(dip); | |
1141 | ||
1142 | fail_quota_locks: | |
1143 | gfs2_quota_unlock(dip); | |
1144 | ||
1145 | fail: | |
1146 | gfs2_alloc_put(dip); | |
1147 | ||
1148 | return error; | |
1149 | } | |
1150 | ||
1151 | /** | |
1152 | * gfs2_createi - Create a new inode | |
1153 | * @ghs: An array of two holders | |
1154 | * @name: The name of the new file | |
1155 | * @mode: the permissions on the new inode | |
1156 | * | |
1157 | * @ghs[0] is an initialized holder for the directory | |
1158 | * @ghs[1] is the holder for the inode lock | |
1159 | * | |
1160 | * If the return value is 0, the glocks on both the directory and the new | |
1161 | * file are held. A transaction has been started and an inplace reservation | |
1162 | * is held, as well. | |
1163 | * | |
1164 | * Returns: errno | |
1165 | */ | |
1166 | ||
1167 | int gfs2_createi(struct gfs2_holder *ghs, struct qstr *name, unsigned int mode) | |
1168 | { | |
1169 | struct gfs2_inode *dip = get_gl2ip(ghs->gh_gl); | |
1170 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1171 | struct gfs2_unlinked *ul; | |
1172 | struct gfs2_inode *ip; | |
1173 | int error; | |
1174 | ||
1175 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
1176 | return -ENAMETOOLONG; | |
1177 | ||
1178 | error = gfs2_unlinked_get(sdp, &ul); | |
1179 | if (error) | |
1180 | return error; | |
1181 | ||
1182 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); | |
1183 | error = gfs2_glock_nq(ghs); | |
1184 | if (error) | |
1185 | goto fail; | |
1186 | ||
1187 | error = create_ok(dip, name, mode); | |
1188 | if (error) | |
1189 | goto fail_gunlock; | |
1190 | ||
1191 | error = pick_formal_ino(sdp, &ul->ul_ut.ut_inum.no_formal_ino); | |
1192 | if (error) | |
1193 | goto fail_gunlock; | |
1194 | ||
1195 | error = alloc_dinode(dip, ul); | |
1196 | if (error) | |
1197 | goto fail_gunlock; | |
1198 | ||
1199 | if (ul->ul_ut.ut_inum.no_addr < dip->i_num.no_addr) { | |
1200 | gfs2_glock_dq(ghs); | |
1201 | ||
1202 | error = gfs2_glock_nq_num(sdp, | |
1203 | ul->ul_ut.ut_inum.no_addr, | |
1204 | &gfs2_inode_glops, | |
1205 | LM_ST_EXCLUSIVE, GL_SKIP, | |
1206 | ghs + 1); | |
1207 | if (error) { | |
1208 | gfs2_unlinked_put(sdp, ul); | |
1209 | return error; | |
1210 | } | |
1211 | ||
1212 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); | |
1213 | error = gfs2_glock_nq(ghs); | |
1214 | if (error) { | |
1215 | gfs2_glock_dq_uninit(ghs + 1); | |
1216 | gfs2_unlinked_put(sdp, ul); | |
1217 | return error; | |
1218 | } | |
1219 | ||
1220 | error = create_ok(dip, name, mode); | |
1221 | if (error) | |
1222 | goto fail_gunlock2; | |
1223 | } else { | |
1224 | error = gfs2_glock_nq_num(sdp, | |
1225 | ul->ul_ut.ut_inum.no_addr, | |
1226 | &gfs2_inode_glops, | |
1227 | LM_ST_EXCLUSIVE, GL_SKIP, | |
1228 | ghs + 1); | |
1229 | if (error) | |
1230 | goto fail_gunlock; | |
1231 | } | |
1232 | ||
1233 | error = make_dinode(dip, ghs[1].gh_gl, mode, ul); | |
1234 | if (error) | |
1235 | goto fail_gunlock2; | |
1236 | ||
1237 | error = gfs2_inode_get(ghs[1].gh_gl, &ul->ul_ut.ut_inum, CREATE, &ip); | |
1238 | if (error) | |
1239 | goto fail_gunlock2; | |
1240 | ||
1241 | error = gfs2_inode_refresh(ip); | |
1242 | if (error) | |
1243 | goto fail_iput; | |
1244 | ||
1245 | error = gfs2_acl_create(dip, ip); | |
1246 | if (error) | |
1247 | goto fail_iput; | |
1248 | ||
1249 | error = link_dinode(dip, name, ip, ul); | |
1250 | if (error) | |
1251 | goto fail_iput; | |
1252 | ||
1253 | gfs2_unlinked_put(sdp, ul); | |
1254 | ||
1255 | return 0; | |
1256 | ||
1257 | fail_iput: | |
1258 | gfs2_inode_put(ip); | |
1259 | ||
1260 | fail_gunlock2: | |
1261 | gfs2_glock_dq_uninit(ghs + 1); | |
1262 | ||
1263 | fail_gunlock: | |
1264 | gfs2_glock_dq(ghs); | |
1265 | ||
1266 | fail: | |
1267 | gfs2_unlinked_put(sdp, ul); | |
1268 | ||
1269 | return error; | |
1270 | } | |
1271 | ||
1272 | /** | |
1273 | * gfs2_unlinki - Unlink a file | |
1274 | * @dip: The inode of the directory | |
1275 | * @name: The name of the file to be unlinked | |
1276 | * @ip: The inode of the file to be removed | |
1277 | * | |
1278 | * Assumes Glocks on both dip and ip are held. | |
1279 | * | |
1280 | * Returns: errno | |
1281 | */ | |
1282 | ||
1283 | int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name, | |
1284 | struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
1285 | { | |
1286 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1287 | int error; | |
1288 | ||
1289 | error = gfs2_dir_del(dip, name); | |
1290 | if (error) | |
1291 | return error; | |
1292 | ||
1293 | error = gfs2_change_nlink(ip, -1); | |
1294 | if (error) | |
1295 | return error; | |
1296 | ||
1297 | /* If this inode is being unlinked from the directory structure, | |
1298 | we need to mark that in the log so that it isn't lost during | |
1299 | a crash. */ | |
1300 | ||
1301 | if (!ip->i_di.di_nlink) { | |
1302 | ul->ul_ut.ut_inum = ip->i_num; | |
1303 | error = gfs2_unlinked_ondisk_add(sdp, ul); | |
1304 | if (!error) | |
1305 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
1306 | } | |
1307 | ||
1308 | return error; | |
1309 | } | |
1310 | ||
1311 | /** | |
1312 | * gfs2_rmdiri - Remove a directory | |
1313 | * @dip: The parent directory of the directory to be removed | |
1314 | * @name: The name of the directory to be removed | |
1315 | * @ip: The GFS2 inode of the directory to be removed | |
1316 | * | |
1317 | * Assumes Glocks on dip and ip are held | |
1318 | * | |
1319 | * Returns: errno | |
1320 | */ | |
1321 | ||
1322 | int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name, | |
1323 | struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
1324 | { | |
1325 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1326 | struct qstr dotname; | |
1327 | int error; | |
1328 | ||
1329 | if (ip->i_di.di_entries != 2) { | |
1330 | if (gfs2_consist_inode(ip)) | |
1331 | gfs2_dinode_print(&ip->i_di); | |
1332 | return -EIO; | |
1333 | } | |
1334 | ||
1335 | error = gfs2_dir_del(dip, name); | |
1336 | if (error) | |
1337 | return error; | |
1338 | ||
1339 | error = gfs2_change_nlink(dip, -1); | |
1340 | if (error) | |
1341 | return error; | |
1342 | ||
1343 | dotname.len = 1; | |
1344 | dotname.name = "."; | |
1345 | error = gfs2_dir_del(ip, &dotname); | |
1346 | if (error) | |
1347 | return error; | |
1348 | ||
1349 | dotname.len = 2; | |
1350 | dotname.name = ".."; | |
1351 | error = gfs2_dir_del(ip, &dotname); | |
1352 | if (error) | |
1353 | return error; | |
1354 | ||
1355 | error = gfs2_change_nlink(ip, -2); | |
1356 | if (error) | |
1357 | return error; | |
1358 | ||
1359 | /* This inode is being unlinked from the directory structure and | |
1360 | we need to mark that in the log so that it isn't lost during | |
1361 | a crash. */ | |
1362 | ||
1363 | ul->ul_ut.ut_inum = ip->i_num; | |
1364 | error = gfs2_unlinked_ondisk_add(sdp, ul); | |
1365 | if (!error) | |
1366 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
1367 | ||
1368 | return error; | |
1369 | } | |
1370 | ||
1371 | /* | |
1372 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1373 | * @dip: the directory | |
1374 | * @name: the name of the file | |
1375 | * @ip: the inode | |
1376 | * | |
1377 | * Assumes that the lock on (at least) @dip is held. | |
1378 | * | |
1379 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1380 | */ | |
1381 | ||
1382 | int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name, | |
1383 | struct gfs2_inode *ip) | |
1384 | { | |
1385 | struct gfs2_inum inum; | |
1386 | unsigned int type; | |
1387 | int error; | |
1388 | ||
1389 | if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode)) | |
1390 | return -EPERM; | |
1391 | ||
1392 | if ((dip->i_di.di_mode & S_ISVTX) && | |
1393 | dip->i_di.di_uid != current->fsuid && | |
1394 | ip->i_di.di_uid != current->fsuid && | |
1395 | !capable(CAP_FOWNER)) | |
1396 | return -EPERM; | |
1397 | ||
1398 | if (IS_APPEND(dip->i_vnode)) | |
1399 | return -EPERM; | |
1400 | ||
1401 | error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL); | |
1402 | if (error) | |
1403 | return error; | |
1404 | ||
1405 | error = gfs2_dir_search(dip, name, &inum, &type); | |
1406 | if (error) | |
1407 | return error; | |
1408 | ||
1409 | if (!gfs2_inum_equal(&inum, &ip->i_num)) | |
1410 | return -ENOENT; | |
1411 | ||
1412 | if (IF2DT(ip->i_di.di_mode) != type) { | |
1413 | gfs2_consist_inode(dip); | |
1414 | return -EIO; | |
1415 | } | |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | /* | |
1421 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1422 | * @this: move this | |
1423 | * @to: to here | |
1424 | * | |
1425 | * Follow @to back to the root and make sure we don't encounter @this | |
1426 | * Assumes we already hold the rename lock. | |
1427 | * | |
1428 | * Returns: errno | |
1429 | */ | |
1430 | ||
1431 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1432 | { | |
1433 | struct gfs2_sbd *sdp = this->i_sbd; | |
1434 | struct gfs2_inode *tmp; | |
1435 | struct qstr dotdot; | |
1436 | int error = 0; | |
1437 | ||
1438 | memset(&dotdot, 0, sizeof(struct qstr)); | |
1439 | dotdot.name = ".."; | |
1440 | dotdot.len = 2; | |
1441 | ||
1442 | gfs2_inode_hold(to); | |
1443 | ||
1444 | for (;;) { | |
1445 | if (to == this) { | |
1446 | error = -EINVAL; | |
1447 | break; | |
1448 | } | |
1449 | if (to == sdp->sd_root_dir) { | |
1450 | error = 0; | |
1451 | break; | |
1452 | } | |
1453 | ||
1454 | error = gfs2_lookupi(to, &dotdot, 1, &tmp); | |
1455 | if (error) | |
1456 | break; | |
1457 | ||
1458 | gfs2_inode_put(to); | |
1459 | to = tmp; | |
1460 | } | |
1461 | ||
1462 | gfs2_inode_put(to); | |
1463 | ||
1464 | return error; | |
1465 | } | |
1466 | ||
1467 | /** | |
1468 | * gfs2_readlinki - return the contents of a symlink | |
1469 | * @ip: the symlink's inode | |
1470 | * @buf: a pointer to the buffer to be filled | |
1471 | * @len: a pointer to the length of @buf | |
1472 | * | |
1473 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1474 | * to be freed by the caller. | |
1475 | * | |
1476 | * Returns: errno | |
1477 | */ | |
1478 | ||
1479 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1480 | { | |
1481 | struct gfs2_holder i_gh; | |
1482 | struct buffer_head *dibh; | |
1483 | unsigned int x; | |
1484 | int error; | |
1485 | ||
1486 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); | |
1487 | error = gfs2_glock_nq_atime(&i_gh); | |
1488 | if (error) { | |
1489 | gfs2_holder_uninit(&i_gh); | |
1490 | return error; | |
1491 | } | |
1492 | ||
1493 | if (!ip->i_di.di_size) { | |
1494 | gfs2_consist_inode(ip); | |
1495 | error = -EIO; | |
1496 | goto out; | |
1497 | } | |
1498 | ||
1499 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1500 | if (error) | |
1501 | goto out; | |
1502 | ||
1503 | x = ip->i_di.di_size + 1; | |
1504 | if (x > *len) { | |
1505 | *buf = kmalloc(x, GFP_KERNEL); | |
1506 | if (!*buf) { | |
1507 | error = -ENOMEM; | |
1508 | goto out_brelse; | |
1509 | } | |
1510 | } | |
1511 | ||
1512 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1513 | *len = x; | |
1514 | ||
1515 | out_brelse: | |
1516 | brelse(dibh); | |
1517 | ||
1518 | out: | |
1519 | gfs2_glock_dq_uninit(&i_gh); | |
1520 | ||
1521 | return error; | |
1522 | } | |
1523 | ||
1524 | /** | |
1525 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and | |
1526 | * conditionally update the inode's atime | |
1527 | * @gh: the holder to acquire | |
1528 | * | |
1529 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap | |
1530 | * Update if the difference between the current time and the inode's current | |
1531 | * atime is greater than an interval specified at mount. | |
1532 | * | |
1533 | * Returns: errno | |
1534 | */ | |
1535 | ||
1536 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) | |
1537 | { | |
1538 | struct gfs2_glock *gl = gh->gh_gl; | |
1539 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
1540 | struct gfs2_inode *ip = get_gl2ip(gl); | |
1541 | int64_t curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum); | |
1542 | unsigned int state; | |
1543 | int flags; | |
1544 | int error; | |
1545 | ||
1546 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || | |
1547 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || | |
1548 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) | |
1549 | return -EINVAL; | |
1550 | ||
1551 | state = gh->gh_state; | |
1552 | flags = gh->gh_flags; | |
1553 | ||
1554 | error = gfs2_glock_nq(gh); | |
1555 | if (error) | |
1556 | return error; | |
1557 | ||
1558 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || | |
1559 | (sdp->sd_vfs->s_flags & MS_RDONLY)) | |
1560 | return 0; | |
1561 | ||
1562 | curtime = get_seconds(); | |
1563 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1564 | gfs2_glock_dq(gh); | |
1565 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, | |
1566 | gh->gh_flags & ~LM_FLAG_ANY, | |
1567 | gh); | |
1568 | error = gfs2_glock_nq(gh); | |
1569 | if (error) | |
1570 | return error; | |
1571 | ||
1572 | /* Verify that atime hasn't been updated while we were | |
1573 | trying to get exclusive lock. */ | |
1574 | ||
1575 | curtime = get_seconds(); | |
1576 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1577 | struct buffer_head *dibh; | |
1578 | ||
1579 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
1580 | if (error == -EROFS) | |
1581 | return 0; | |
1582 | if (error) | |
1583 | goto fail; | |
1584 | ||
1585 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1586 | if (error) | |
1587 | goto fail_end_trans; | |
1588 | ||
1589 | ip->i_di.di_atime = curtime; | |
1590 | ||
1591 | gfs2_trans_add_bh(ip->i_gl, dibh); | |
1592 | gfs2_dinode_out(&ip->i_di, dibh->b_data); | |
1593 | brelse(dibh); | |
1594 | ||
1595 | gfs2_trans_end(sdp); | |
1596 | } | |
1597 | ||
1598 | /* If someone else has asked for the glock, | |
1599 | unlock and let them have it. Then reacquire | |
1600 | in the original state. */ | |
1601 | if (gfs2_glock_is_blocking(gl)) { | |
1602 | gfs2_glock_dq(gh); | |
1603 | gfs2_holder_reinit(state, flags, gh); | |
1604 | return gfs2_glock_nq(gh); | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | return 0; | |
1609 | ||
1610 | fail_end_trans: | |
1611 | gfs2_trans_end(sdp); | |
1612 | ||
1613 | fail: | |
1614 | gfs2_glock_dq(gh); | |
1615 | ||
1616 | return error; | |
1617 | } | |
1618 | ||
1619 | /** | |
1620 | * glock_compare_atime - Compare two struct gfs2_glock structures for sort | |
1621 | * @arg_a: the first structure | |
1622 | * @arg_b: the second structure | |
1623 | * | |
1624 | * Returns: 1 if A > B | |
1625 | * -1 if A < B | |
1626 | * 0 if A = B | |
1627 | */ | |
1628 | ||
1629 | static int glock_compare_atime(const void *arg_a, const void *arg_b) | |
1630 | { | |
1631 | struct gfs2_holder *gh_a = *(struct gfs2_holder **)arg_a; | |
1632 | struct gfs2_holder *gh_b = *(struct gfs2_holder **)arg_b; | |
1633 | struct lm_lockname *a = &gh_a->gh_gl->gl_name; | |
1634 | struct lm_lockname *b = &gh_b->gh_gl->gl_name; | |
1635 | int ret = 0; | |
1636 | ||
1637 | if (a->ln_number > b->ln_number) | |
1638 | ret = 1; | |
1639 | else if (a->ln_number < b->ln_number) | |
1640 | ret = -1; | |
1641 | else { | |
1642 | if (gh_a->gh_state == LM_ST_SHARED && | |
1643 | gh_b->gh_state == LM_ST_EXCLUSIVE) | |
1644 | ret = 1; | |
1645 | else if (gh_a->gh_state == LM_ST_SHARED && | |
1646 | (gh_b->gh_flags & GL_ATIME)) | |
1647 | ret = 1; | |
1648 | } | |
1649 | ||
1650 | return ret; | |
1651 | } | |
1652 | ||
1653 | /** | |
1654 | * gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an | |
1655 | * atime update | |
1656 | * @num_gh: the number of structures | |
1657 | * @ghs: an array of struct gfs2_holder structures | |
1658 | * | |
1659 | * Returns: 0 on success (all glocks acquired), | |
1660 | * errno on failure (no glocks acquired) | |
1661 | */ | |
1662 | ||
1663 | int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs) | |
1664 | { | |
1665 | struct gfs2_holder **p; | |
1666 | unsigned int x; | |
1667 | int error = 0; | |
1668 | ||
1669 | if (!num_gh) | |
1670 | return 0; | |
1671 | ||
1672 | if (num_gh == 1) { | |
1673 | ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1674 | if (ghs->gh_flags & GL_ATIME) | |
1675 | error = gfs2_glock_nq_atime(ghs); | |
1676 | else | |
1677 | error = gfs2_glock_nq(ghs); | |
1678 | return error; | |
1679 | } | |
1680 | ||
1681 | p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL); | |
1682 | if (!p) | |
1683 | return -ENOMEM; | |
1684 | ||
1685 | for (x = 0; x < num_gh; x++) | |
1686 | p[x] = &ghs[x]; | |
1687 | ||
1688 | sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL); | |
1689 | ||
1690 | for (x = 0; x < num_gh; x++) { | |
1691 | p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1692 | ||
1693 | if (p[x]->gh_flags & GL_ATIME) | |
1694 | error = gfs2_glock_nq_atime(p[x]); | |
1695 | else | |
1696 | error = gfs2_glock_nq(p[x]); | |
1697 | ||
1698 | if (error) { | |
1699 | while (x--) | |
1700 | gfs2_glock_dq(p[x]); | |
1701 | break; | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | kfree(p); | |
1706 | ||
1707 | return error; | |
1708 | } | |
1709 | ||
1710 | /** | |
1711 | * gfs2_try_toss_vnode - See if we can toss a vnode from memory | |
1712 | * @ip: the inode | |
1713 | * | |
1714 | * Returns: 1 if the vnode was tossed | |
1715 | */ | |
1716 | ||
1717 | void gfs2_try_toss_vnode(struct gfs2_inode *ip) | |
1718 | { | |
1719 | struct inode *inode; | |
1720 | ||
1721 | inode = gfs2_ip2v_lookup(ip); | |
1722 | if (!inode) | |
1723 | return; | |
1724 | ||
1725 | d_prune_aliases(inode); | |
1726 | ||
1727 | if (S_ISDIR(ip->i_di.di_mode)) { | |
1728 | struct list_head *head = &inode->i_dentry; | |
1729 | struct dentry *d = NULL; | |
1730 | ||
1731 | spin_lock(&dcache_lock); | |
1732 | if (list_empty(head)) | |
1733 | spin_unlock(&dcache_lock); | |
1734 | else { | |
1735 | d = list_entry(head->next, struct dentry, d_alias); | |
1736 | dget_locked(d); | |
1737 | spin_unlock(&dcache_lock); | |
1738 | ||
1739 | if (have_submounts(d)) | |
1740 | dput(d); | |
1741 | else { | |
1742 | shrink_dcache_parent(d); | |
1743 | dput(d); | |
1744 | d_prune_aliases(inode); | |
1745 | } | |
1746 | } | |
1747 | } | |
1748 | ||
1749 | inode->i_nlink = 0; | |
1750 | iput(inode); | |
1751 | } | |
1752 | ||
1753 | ||
1754 | static int | |
1755 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1756 | { | |
1757 | struct buffer_head *dibh; | |
1758 | int error; | |
1759 | ||
1760 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1761 | if (!error) { | |
1762 | error = inode_setattr(ip->i_vnode, attr); | |
1763 | gfs2_assert_warn(ip->i_sbd, !error); | |
1764 | gfs2_inode_attr_out(ip); | |
1765 | ||
1766 | gfs2_trans_add_bh(ip->i_gl, dibh); | |
1767 | gfs2_dinode_out(&ip->i_di, dibh->b_data); | |
1768 | brelse(dibh); | |
1769 | } | |
1770 | return error; | |
1771 | } | |
1772 | ||
1773 | /** | |
1774 | * gfs2_setattr_simple - | |
1775 | * @ip: | |
1776 | * @attr: | |
1777 | * | |
1778 | * Called with a reference on the vnode. | |
1779 | * | |
1780 | * Returns: errno | |
1781 | */ | |
1782 | ||
1783 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1784 | { | |
1785 | int error; | |
1786 | ||
1787 | if (get_transaction) | |
1788 | return __gfs2_setattr_simple(ip, attr); | |
1789 | ||
1790 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0); | |
1791 | if (error) | |
1792 | return error; | |
1793 | ||
1794 | error = __gfs2_setattr_simple(ip, attr); | |
1795 | ||
1796 | gfs2_trans_end(ip->i_sbd); | |
1797 | ||
1798 | return error; | |
1799 | } | |
1800 | ||
1801 | int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd) | |
1802 | { | |
1803 | return permission(inode, mask, nd); | |
1804 | } | |
1805 |