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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> | |
5c676f6d | 17 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
18 | #include <asm/semaphore.h> |
19 | ||
20 | #include "gfs2.h" | |
5c676f6d SW |
21 | #include "lm_interface.h" |
22 | #include "incore.h" | |
b3b94faa DT |
23 | #include "acl.h" |
24 | #include "bmap.h" | |
25 | #include "dir.h" | |
26 | #include "eattr.h" | |
27 | #include "glock.h" | |
28 | #include "glops.h" | |
29 | #include "inode.h" | |
30 | #include "log.h" | |
31 | #include "meta_io.h" | |
32 | #include "ops_address.h" | |
33 | #include "ops_file.h" | |
34 | #include "ops_inode.h" | |
35 | #include "quota.h" | |
36 | #include "rgrp.h" | |
37 | #include "trans.h" | |
38 | #include "unlinked.h" | |
5c676f6d | 39 | #include "util.h" |
b3b94faa DT |
40 | |
41 | /** | |
42 | * inode_attr_in - Copy attributes from the dinode into the VFS inode | |
43 | * @ip: The GFS2 inode (with embedded disk inode data) | |
44 | * @inode: The Linux VFS inode | |
45 | * | |
46 | */ | |
47 | ||
48 | static void inode_attr_in(struct gfs2_inode *ip, struct inode *inode) | |
49 | { | |
50 | inode->i_ino = ip->i_num.no_formal_ino; | |
51 | ||
52 | switch (ip->i_di.di_mode & S_IFMT) { | |
53 | case S_IFBLK: | |
54 | case S_IFCHR: | |
55 | inode->i_rdev = MKDEV(ip->i_di.di_major, ip->i_di.di_minor); | |
56 | break; | |
57 | default: | |
58 | inode->i_rdev = 0; | |
59 | break; | |
60 | }; | |
61 | ||
62 | inode->i_mode = ip->i_di.di_mode; | |
63 | inode->i_nlink = ip->i_di.di_nlink; | |
64 | inode->i_uid = ip->i_di.di_uid; | |
65 | inode->i_gid = ip->i_di.di_gid; | |
66 | i_size_write(inode, ip->i_di.di_size); | |
67 | inode->i_atime.tv_sec = ip->i_di.di_atime; | |
68 | inode->i_mtime.tv_sec = ip->i_di.di_mtime; | |
69 | inode->i_ctime.tv_sec = ip->i_di.di_ctime; | |
70 | inode->i_atime.tv_nsec = 0; | |
71 | inode->i_mtime.tv_nsec = 0; | |
72 | inode->i_ctime.tv_nsec = 0; | |
73 | inode->i_blksize = PAGE_SIZE; | |
74 | inode->i_blocks = ip->i_di.di_blocks << | |
75 | (ip->i_sbd->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT); | |
76 | ||
77 | if (ip->i_di.di_flags & GFS2_DIF_IMMUTABLE) | |
78 | inode->i_flags |= S_IMMUTABLE; | |
79 | else | |
80 | inode->i_flags &= ~S_IMMUTABLE; | |
81 | ||
82 | if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) | |
83 | inode->i_flags |= S_APPEND; | |
84 | else | |
85 | inode->i_flags &= ~S_APPEND; | |
86 | } | |
87 | ||
88 | /** | |
89 | * gfs2_inode_attr_in - Copy attributes from the dinode into the VFS inode | |
90 | * @ip: The GFS2 inode (with embedded disk inode data) | |
91 | * | |
92 | */ | |
93 | ||
94 | void gfs2_inode_attr_in(struct gfs2_inode *ip) | |
95 | { | |
96 | struct inode *inode; | |
97 | ||
98 | inode = gfs2_ip2v_lookup(ip); | |
99 | if (inode) { | |
100 | inode_attr_in(ip, inode); | |
101 | iput(inode); | |
102 | } | |
103 | } | |
104 | ||
105 | /** | |
106 | * gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode | |
107 | * @ip: The GFS2 inode | |
108 | * | |
109 | * Only copy out the attributes that we want the VFS layer | |
110 | * to be able to modify. | |
111 | */ | |
112 | ||
113 | void gfs2_inode_attr_out(struct gfs2_inode *ip) | |
114 | { | |
115 | struct inode *inode = ip->i_vnode; | |
116 | ||
117 | gfs2_assert_withdraw(ip->i_sbd, | |
118 | (ip->i_di.di_mode & S_IFMT) == (inode->i_mode & S_IFMT)); | |
119 | ip->i_di.di_mode = inode->i_mode; | |
120 | ip->i_di.di_uid = inode->i_uid; | |
121 | ip->i_di.di_gid = inode->i_gid; | |
122 | ip->i_di.di_atime = inode->i_atime.tv_sec; | |
123 | ip->i_di.di_mtime = inode->i_mtime.tv_sec; | |
124 | ip->i_di.di_ctime = inode->i_ctime.tv_sec; | |
125 | } | |
126 | ||
127 | /** | |
128 | * gfs2_ip2v_lookup - Get the struct inode for a struct gfs2_inode | |
129 | * @ip: the struct gfs2_inode to get the struct inode for | |
130 | * | |
131 | * Returns: A VFS inode, or NULL if none | |
132 | */ | |
133 | ||
134 | struct inode *gfs2_ip2v_lookup(struct gfs2_inode *ip) | |
135 | { | |
136 | struct inode *inode = NULL; | |
137 | ||
138 | gfs2_assert_warn(ip->i_sbd, test_bit(GIF_MIN_INIT, &ip->i_flags)); | |
139 | ||
140 | spin_lock(&ip->i_spin); | |
141 | if (ip->i_vnode) | |
142 | inode = igrab(ip->i_vnode); | |
143 | spin_unlock(&ip->i_spin); | |
144 | ||
145 | return inode; | |
146 | } | |
147 | ||
148 | /** | |
149 | * gfs2_ip2v - Get/Create a struct inode for a struct gfs2_inode | |
150 | * @ip: the struct gfs2_inode to get the struct inode for | |
151 | * | |
152 | * Returns: A VFS inode, or NULL if no mem | |
153 | */ | |
154 | ||
155 | struct inode *gfs2_ip2v(struct gfs2_inode *ip) | |
156 | { | |
157 | struct inode *inode, *tmp; | |
158 | ||
159 | inode = gfs2_ip2v_lookup(ip); | |
160 | if (inode) | |
161 | return inode; | |
162 | ||
163 | tmp = new_inode(ip->i_sbd->sd_vfs); | |
164 | if (!tmp) | |
165 | return NULL; | |
166 | ||
167 | inode_attr_in(ip, tmp); | |
168 | ||
169 | if (S_ISREG(ip->i_di.di_mode)) { | |
170 | tmp->i_op = &gfs2_file_iops; | |
171 | tmp->i_fop = &gfs2_file_fops; | |
172 | tmp->i_mapping->a_ops = &gfs2_file_aops; | |
173 | } else if (S_ISDIR(ip->i_di.di_mode)) { | |
174 | tmp->i_op = &gfs2_dir_iops; | |
175 | tmp->i_fop = &gfs2_dir_fops; | |
176 | } else if (S_ISLNK(ip->i_di.di_mode)) { | |
177 | tmp->i_op = &gfs2_symlink_iops; | |
178 | } else { | |
179 | tmp->i_op = &gfs2_dev_iops; | |
180 | init_special_inode(tmp, tmp->i_mode, tmp->i_rdev); | |
181 | } | |
182 | ||
5c676f6d | 183 | tmp->u.generic_ip = NULL; |
b3b94faa DT |
184 | |
185 | for (;;) { | |
186 | spin_lock(&ip->i_spin); | |
187 | if (!ip->i_vnode) | |
188 | break; | |
189 | inode = igrab(ip->i_vnode); | |
190 | spin_unlock(&ip->i_spin); | |
191 | ||
192 | if (inode) { | |
193 | iput(tmp); | |
194 | return inode; | |
195 | } | |
196 | yield(); | |
197 | } | |
198 | ||
199 | inode = tmp; | |
200 | ||
201 | gfs2_inode_hold(ip); | |
202 | ip->i_vnode = inode; | |
5c676f6d | 203 | inode->u.generic_ip = ip; |
b3b94faa DT |
204 | |
205 | spin_unlock(&ip->i_spin); | |
206 | ||
207 | insert_inode_hash(inode); | |
208 | ||
209 | return inode; | |
210 | } | |
211 | ||
212 | static int iget_test(struct inode *inode, void *opaque) | |
213 | { | |
5c676f6d | 214 | struct gfs2_inode *ip = inode->u.generic_ip; |
b3b94faa DT |
215 | struct gfs2_inum *inum = (struct gfs2_inum *)opaque; |
216 | ||
217 | if (ip && ip->i_num.no_addr == inum->no_addr) | |
218 | return 1; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum) | |
224 | { | |
225 | return ilookup5(sb, (unsigned long)inum->no_formal_ino, | |
226 | iget_test, inum); | |
227 | } | |
228 | ||
229 | void gfs2_inode_min_init(struct gfs2_inode *ip, unsigned int type) | |
230 | { | |
231 | spin_lock(&ip->i_spin); | |
232 | if (!test_and_set_bit(GIF_MIN_INIT, &ip->i_flags)) { | |
233 | ip->i_di.di_nlink = 1; | |
234 | ip->i_di.di_mode = DT2IF(type); | |
235 | } | |
236 | spin_unlock(&ip->i_spin); | |
237 | } | |
238 | ||
239 | /** | |
240 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
241 | * @ip: The GFS2 inode | |
242 | * | |
243 | * Returns: errno | |
244 | */ | |
245 | ||
246 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
247 | { | |
248 | struct buffer_head *dibh; | |
249 | int error; | |
250 | ||
251 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
252 | if (error) | |
253 | return error; | |
254 | ||
255 | if (gfs2_metatype_check(ip->i_sbd, dibh, GFS2_METATYPE_DI)) { | |
256 | brelse(dibh); | |
257 | return -EIO; | |
258 | } | |
259 | ||
260 | spin_lock(&ip->i_spin); | |
261 | gfs2_dinode_in(&ip->i_di, dibh->b_data); | |
262 | set_bit(GIF_MIN_INIT, &ip->i_flags); | |
263 | spin_unlock(&ip->i_spin); | |
264 | ||
265 | brelse(dibh); | |
266 | ||
267 | if (ip->i_num.no_addr != ip->i_di.di_num.no_addr) { | |
268 | if (gfs2_consist_inode(ip)) | |
269 | gfs2_dinode_print(&ip->i_di); | |
270 | return -EIO; | |
271 | } | |
272 | if (ip->i_num.no_formal_ino != ip->i_di.di_num.no_formal_ino) | |
273 | return -ESTALE; | |
274 | ||
275 | ip->i_vn = ip->i_gl->gl_vn; | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | /** | |
281 | * inode_create - create a struct gfs2_inode | |
282 | * @i_gl: The glock covering the inode | |
283 | * @inum: The inode number | |
284 | * @io_gl: the iopen glock to acquire/hold (using holder in new gfs2_inode) | |
285 | * @io_state: the state the iopen glock should be acquired in | |
286 | * @ipp: pointer to put the returned inode in | |
287 | * | |
288 | * Returns: errno | |
289 | */ | |
290 | ||
291 | static int inode_create(struct gfs2_glock *i_gl, struct gfs2_inum *inum, | |
292 | struct gfs2_glock *io_gl, unsigned int io_state, | |
293 | struct gfs2_inode **ipp) | |
294 | { | |
295 | struct gfs2_sbd *sdp = i_gl->gl_sbd; | |
296 | struct gfs2_inode *ip; | |
297 | int error = 0; | |
298 | ||
299 | ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL); | |
300 | if (!ip) | |
301 | return -ENOMEM; | |
302 | memset(ip, 0, sizeof(struct gfs2_inode)); | |
303 | ||
304 | ip->i_num = *inum; | |
305 | ||
306 | atomic_set(&ip->i_count, 1); | |
307 | ||
308 | ip->i_vn = i_gl->gl_vn - 1; | |
309 | ||
310 | ip->i_gl = i_gl; | |
311 | ip->i_sbd = sdp; | |
312 | ||
313 | spin_lock_init(&ip->i_spin); | |
314 | init_rwsem(&ip->i_rw_mutex); | |
315 | ||
316 | ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default); | |
317 | ||
318 | error = gfs2_glock_nq_init(io_gl, | |
319 | io_state, GL_LOCAL_EXCL | GL_EXACT, | |
320 | &ip->i_iopen_gh); | |
321 | if (error) | |
322 | goto fail; | |
323 | ip->i_iopen_gh.gh_owner = NULL; | |
324 | ||
325 | spin_lock(&io_gl->gl_spin); | |
326 | gfs2_glock_hold(i_gl); | |
5c676f6d | 327 | io_gl->gl_object = i_gl; |
b3b94faa DT |
328 | spin_unlock(&io_gl->gl_spin); |
329 | ||
330 | gfs2_glock_hold(i_gl); | |
5c676f6d | 331 | i_gl->gl_object = ip; |
b3b94faa DT |
332 | |
333 | atomic_inc(&sdp->sd_inode_count); | |
334 | ||
335 | *ipp = ip; | |
336 | ||
337 | return 0; | |
338 | ||
339 | fail: | |
340 | gfs2_meta_cache_flush(ip); | |
341 | kmem_cache_free(gfs2_inode_cachep, ip); | |
342 | *ipp = NULL; | |
343 | ||
344 | return error; | |
345 | } | |
346 | ||
347 | /** | |
348 | * gfs2_inode_get - Create or get a reference on an inode | |
349 | * @i_gl: The glock covering the inode | |
350 | * @inum: The inode number | |
351 | * @create: | |
352 | * @ipp: pointer to put the returned inode in | |
353 | * | |
354 | * Returns: errno | |
355 | */ | |
356 | ||
357 | int gfs2_inode_get(struct gfs2_glock *i_gl, struct gfs2_inum *inum, int create, | |
358 | struct gfs2_inode **ipp) | |
359 | { | |
360 | struct gfs2_sbd *sdp = i_gl->gl_sbd; | |
361 | struct gfs2_glock *io_gl; | |
362 | int error = 0; | |
363 | ||
364 | gfs2_glmutex_lock(i_gl); | |
365 | ||
5c676f6d | 366 | *ipp = i_gl->gl_object; |
b3b94faa DT |
367 | if (*ipp) { |
368 | error = -ESTALE; | |
369 | if ((*ipp)->i_num.no_formal_ino != inum->no_formal_ino) | |
370 | goto out; | |
371 | atomic_inc(&(*ipp)->i_count); | |
372 | error = 0; | |
373 | goto out; | |
374 | } | |
375 | ||
376 | if (!create) | |
377 | goto out; | |
378 | ||
379 | error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, | |
380 | CREATE, &io_gl); | |
381 | if (!error) { | |
382 | error = inode_create(i_gl, inum, io_gl, LM_ST_SHARED, ipp); | |
383 | gfs2_glock_put(io_gl); | |
384 | } | |
385 | ||
386 | out: | |
387 | gfs2_glmutex_unlock(i_gl); | |
388 | ||
389 | return error; | |
390 | } | |
391 | ||
392 | void gfs2_inode_hold(struct gfs2_inode *ip) | |
393 | { | |
394 | gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0); | |
395 | atomic_inc(&ip->i_count); | |
396 | } | |
397 | ||
398 | void gfs2_inode_put(struct gfs2_inode *ip) | |
399 | { | |
400 | gfs2_assert(ip->i_sbd, atomic_read(&ip->i_count) > 0); | |
401 | atomic_dec(&ip->i_count); | |
402 | } | |
403 | ||
404 | void gfs2_inode_destroy(struct gfs2_inode *ip) | |
405 | { | |
406 | struct gfs2_sbd *sdp = ip->i_sbd; | |
407 | struct gfs2_glock *io_gl = ip->i_iopen_gh.gh_gl; | |
408 | struct gfs2_glock *i_gl = ip->i_gl; | |
409 | ||
410 | gfs2_assert_warn(sdp, !atomic_read(&ip->i_count)); | |
5c676f6d | 411 | gfs2_assert(sdp, io_gl->gl_object == i_gl); |
b3b94faa DT |
412 | |
413 | spin_lock(&io_gl->gl_spin); | |
5c676f6d | 414 | io_gl->gl_object = NULL; |
b3b94faa DT |
415 | gfs2_glock_put(i_gl); |
416 | spin_unlock(&io_gl->gl_spin); | |
417 | ||
418 | gfs2_glock_dq_uninit(&ip->i_iopen_gh); | |
419 | ||
420 | gfs2_meta_cache_flush(ip); | |
421 | kmem_cache_free(gfs2_inode_cachep, ip); | |
422 | ||
5c676f6d | 423 | i_gl->gl_object = NULL; |
b3b94faa DT |
424 | gfs2_glock_put(i_gl); |
425 | ||
426 | atomic_dec(&sdp->sd_inode_count); | |
427 | } | |
428 | ||
429 | static int dinode_dealloc(struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
430 | { | |
431 | struct gfs2_sbd *sdp = ip->i_sbd; | |
432 | struct gfs2_alloc *al; | |
433 | struct gfs2_rgrpd *rgd; | |
434 | int error; | |
435 | ||
436 | if (ip->i_di.di_blocks != 1) { | |
437 | if (gfs2_consist_inode(ip)) | |
438 | gfs2_dinode_print(&ip->i_di); | |
439 | return -EIO; | |
440 | } | |
441 | ||
442 | al = gfs2_alloc_get(ip); | |
443 | ||
444 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
445 | if (error) | |
446 | goto out; | |
447 | ||
448 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); | |
449 | if (error) | |
450 | goto out_qs; | |
451 | ||
452 | rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr); | |
453 | if (!rgd) { | |
454 | gfs2_consist_inode(ip); | |
455 | error = -EIO; | |
456 | goto out_rindex_relse; | |
457 | } | |
458 | ||
459 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, | |
460 | &al->al_rgd_gh); | |
461 | if (error) | |
462 | goto out_rindex_relse; | |
463 | ||
464 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED + | |
465 | RES_STATFS + RES_QUOTA, 1); | |
466 | if (error) | |
467 | goto out_rg_gunlock; | |
468 | ||
469 | gfs2_trans_add_gl(ip->i_gl); | |
470 | ||
471 | gfs2_free_di(rgd, ip); | |
472 | ||
473 | error = gfs2_unlinked_ondisk_rm(sdp, ul); | |
474 | ||
475 | gfs2_trans_end(sdp); | |
476 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
477 | ||
478 | out_rg_gunlock: | |
479 | gfs2_glock_dq_uninit(&al->al_rgd_gh); | |
480 | ||
481 | out_rindex_relse: | |
482 | gfs2_glock_dq_uninit(&al->al_ri_gh); | |
483 | ||
484 | out_qs: | |
485 | gfs2_quota_unhold(ip); | |
486 | ||
487 | out: | |
488 | gfs2_alloc_put(ip); | |
489 | ||
490 | return error; | |
491 | } | |
492 | ||
493 | /** | |
494 | * inode_dealloc - Deallocate all on-disk blocks for an inode (dinode) | |
495 | * @sdp: the filesystem | |
496 | * @inum: the inode number to deallocate | |
497 | * @io_gh: a holder for the iopen glock for this inode | |
498 | * | |
499 | * Returns: errno | |
500 | */ | |
501 | ||
502 | static int inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul, | |
503 | struct gfs2_holder *io_gh) | |
504 | { | |
505 | struct gfs2_inode *ip; | |
506 | struct gfs2_holder i_gh; | |
507 | int error; | |
508 | ||
509 | error = gfs2_glock_nq_num(sdp, | |
510 | ul->ul_ut.ut_inum.no_addr, &gfs2_inode_glops, | |
511 | LM_ST_EXCLUSIVE, 0, &i_gh); | |
512 | if (error) | |
513 | return error; | |
514 | ||
515 | /* We reacquire the iopen lock here to avoid a race with the NFS server | |
516 | calling gfs2_read_inode() with the inode number of a inode we're in | |
517 | the process of deallocating. And we can't keep our hold on the lock | |
518 | from inode_dealloc_init() for deadlock reasons. */ | |
519 | ||
520 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY, io_gh); | |
521 | error = gfs2_glock_nq(io_gh); | |
522 | switch (error) { | |
523 | case 0: | |
524 | break; | |
525 | case GLR_TRYFAILED: | |
526 | error = 1; | |
527 | default: | |
528 | goto out; | |
529 | } | |
530 | ||
5c676f6d | 531 | gfs2_assert_warn(sdp, !i_gh.gh_gl->gl_object); |
b3b94faa DT |
532 | error = inode_create(i_gh.gh_gl, &ul->ul_ut.ut_inum, io_gh->gh_gl, |
533 | LM_ST_EXCLUSIVE, &ip); | |
534 | ||
535 | gfs2_glock_dq(io_gh); | |
536 | ||
537 | if (error) | |
538 | goto out; | |
539 | ||
540 | error = gfs2_inode_refresh(ip); | |
541 | if (error) | |
542 | goto out_iput; | |
543 | ||
544 | if (ip->i_di.di_nlink) { | |
545 | if (gfs2_consist_inode(ip)) | |
546 | gfs2_dinode_print(&ip->i_di); | |
547 | error = -EIO; | |
548 | goto out_iput; | |
549 | } | |
550 | ||
551 | if (S_ISDIR(ip->i_di.di_mode) && | |
552 | (ip->i_di.di_flags & GFS2_DIF_EXHASH)) { | |
553 | error = gfs2_dir_exhash_dealloc(ip); | |
554 | if (error) | |
555 | goto out_iput; | |
556 | } | |
557 | ||
558 | if (ip->i_di.di_eattr) { | |
559 | error = gfs2_ea_dealloc(ip); | |
560 | if (error) | |
561 | goto out_iput; | |
562 | } | |
563 | ||
564 | if (!gfs2_is_stuffed(ip)) { | |
565 | error = gfs2_file_dealloc(ip); | |
566 | if (error) | |
567 | goto out_iput; | |
568 | } | |
569 | ||
570 | error = dinode_dealloc(ip, ul); | |
571 | if (error) | |
572 | goto out_iput; | |
573 | ||
574 | out_iput: | |
575 | gfs2_glmutex_lock(i_gh.gh_gl); | |
576 | gfs2_inode_put(ip); | |
577 | gfs2_inode_destroy(ip); | |
578 | gfs2_glmutex_unlock(i_gh.gh_gl); | |
579 | ||
580 | out: | |
581 | gfs2_glock_dq_uninit(&i_gh); | |
582 | ||
583 | return error; | |
584 | } | |
585 | ||
586 | /** | |
587 | * try_inode_dealloc - Try to deallocate an inode and all its blocks | |
588 | * @sdp: the filesystem | |
589 | * | |
590 | * Returns: 0 on success, -errno on error, 1 on busy (inode open) | |
591 | */ | |
592 | ||
593 | static int try_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul) | |
594 | { | |
595 | struct gfs2_holder io_gh; | |
596 | int error = 0; | |
597 | ||
598 | gfs2_try_toss_inode(sdp, &ul->ul_ut.ut_inum); | |
599 | ||
600 | error = gfs2_glock_nq_num(sdp, | |
601 | ul->ul_ut.ut_inum.no_addr, &gfs2_iopen_glops, | |
602 | LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB, &io_gh); | |
603 | switch (error) { | |
604 | case 0: | |
605 | break; | |
606 | case GLR_TRYFAILED: | |
607 | return 1; | |
608 | default: | |
609 | return error; | |
610 | } | |
611 | ||
612 | gfs2_glock_dq(&io_gh); | |
613 | error = inode_dealloc(sdp, ul, &io_gh); | |
614 | gfs2_holder_uninit(&io_gh); | |
615 | ||
616 | return error; | |
617 | } | |
618 | ||
619 | static int inode_dealloc_uninit(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul) | |
620 | { | |
621 | struct gfs2_rgrpd *rgd; | |
622 | struct gfs2_holder ri_gh, rgd_gh; | |
623 | int error; | |
624 | ||
625 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
626 | if (error) | |
627 | return error; | |
628 | ||
629 | rgd = gfs2_blk2rgrpd(sdp, ul->ul_ut.ut_inum.no_addr); | |
630 | if (!rgd) { | |
631 | gfs2_consist(sdp); | |
632 | error = -EIO; | |
633 | goto out; | |
634 | } | |
635 | ||
636 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rgd_gh); | |
637 | if (error) | |
638 | goto out; | |
639 | ||
640 | error = gfs2_trans_begin(sdp, | |
641 | RES_RG_BIT + RES_UNLINKED + RES_STATFS, | |
642 | 0); | |
643 | if (error) | |
644 | goto out_gunlock; | |
645 | ||
646 | gfs2_free_uninit_di(rgd, ul->ul_ut.ut_inum.no_addr); | |
647 | gfs2_unlinked_ondisk_rm(sdp, ul); | |
648 | ||
649 | gfs2_trans_end(sdp); | |
650 | ||
651 | out_gunlock: | |
652 | gfs2_glock_dq_uninit(&rgd_gh); | |
653 | out: | |
654 | gfs2_glock_dq_uninit(&ri_gh); | |
655 | ||
656 | return error; | |
657 | } | |
658 | ||
659 | int gfs2_inode_dealloc(struct gfs2_sbd *sdp, struct gfs2_unlinked *ul) | |
660 | { | |
661 | if (ul->ul_ut.ut_flags & GFS2_UTF_UNINIT) | |
662 | return inode_dealloc_uninit(sdp, ul); | |
663 | else | |
664 | return try_inode_dealloc(sdp, ul); | |
665 | } | |
666 | ||
667 | /** | |
668 | * gfs2_change_nlink - Change nlink count on inode | |
669 | * @ip: The GFS2 inode | |
670 | * @diff: The change in the nlink count required | |
671 | * | |
672 | * Returns: errno | |
673 | */ | |
674 | ||
675 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) | |
676 | { | |
677 | struct buffer_head *dibh; | |
678 | uint32_t nlink; | |
679 | int error; | |
680 | ||
681 | nlink = ip->i_di.di_nlink + diff; | |
682 | ||
683 | /* If we are reducing the nlink count, but the new value ends up being | |
684 | bigger than the old one, we must have underflowed. */ | |
685 | if (diff < 0 && nlink > ip->i_di.di_nlink) { | |
686 | if (gfs2_consist_inode(ip)) | |
687 | gfs2_dinode_print(&ip->i_di); | |
688 | return -EIO; | |
689 | } | |
690 | ||
691 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
692 | if (error) | |
693 | return error; | |
694 | ||
695 | ip->i_di.di_nlink = nlink; | |
696 | ip->i_di.di_ctime = get_seconds(); | |
697 | ||
d4e9c4c3 | 698 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
699 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
700 | brelse(dibh); | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
705 | /** | |
706 | * gfs2_lookupi - Look up a filename in a directory and return its inode | |
707 | * @d_gh: An initialized holder for the directory glock | |
708 | * @name: The name of the inode to look for | |
709 | * @is_root: If 1, ignore the caller's permissions | |
710 | * @i_gh: An uninitialized holder for the new inode glock | |
711 | * | |
712 | * There will always be a vnode (Linux VFS inode) for the d_gh inode unless | |
713 | * @is_root is true. | |
714 | * | |
715 | * Returns: errno | |
716 | */ | |
717 | ||
7359a19c SW |
718 | int gfs2_lookupi(struct inode *dir, struct qstr *name, int is_root, |
719 | struct inode **inodep) | |
b3b94faa | 720 | { |
7359a19c | 721 | struct gfs2_inode *ipp; |
5c676f6d | 722 | struct gfs2_inode *dip = dir->u.generic_ip; |
b3b94faa DT |
723 | struct gfs2_sbd *sdp = dip->i_sbd; |
724 | struct gfs2_holder d_gh; | |
725 | struct gfs2_inum inum; | |
726 | unsigned int type; | |
727 | struct gfs2_glock *gl; | |
7359a19c SW |
728 | int error = 0; |
729 | ||
730 | *inodep = NULL; | |
b3b94faa DT |
731 | |
732 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
733 | return -ENAMETOOLONG; | |
734 | ||
735 | if (gfs2_filecmp(name, ".", 1) || | |
7359a19c | 736 | (gfs2_filecmp(name, "..", 2) && dir == sdp->sd_root_dir)) { |
b3b94faa | 737 | gfs2_inode_hold(dip); |
7359a19c SW |
738 | ipp = dip; |
739 | goto done; | |
b3b94faa DT |
740 | } |
741 | ||
742 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); | |
743 | if (error) | |
744 | return error; | |
745 | ||
746 | if (!is_root) { | |
747 | error = gfs2_repermission(dip->i_vnode, MAY_EXEC, NULL); | |
748 | if (error) | |
749 | goto out; | |
750 | } | |
751 | ||
752 | error = gfs2_dir_search(dip, name, &inum, &type); | |
753 | if (error) | |
754 | goto out; | |
755 | ||
756 | error = gfs2_glock_get(sdp, inum.no_addr, &gfs2_inode_glops, | |
757 | CREATE, &gl); | |
758 | if (error) | |
759 | goto out; | |
760 | ||
7359a19c | 761 | error = gfs2_inode_get(gl, &inum, CREATE, &ipp); |
b3b94faa | 762 | if (!error) |
7359a19c | 763 | gfs2_inode_min_init(ipp, type); |
b3b94faa DT |
764 | |
765 | gfs2_glock_put(gl); | |
766 | ||
7359a19c | 767 | out: |
b3b94faa | 768 | gfs2_glock_dq_uninit(&d_gh); |
7359a19c SW |
769 | done: |
770 | if (error == 0) { | |
771 | *inodep = gfs2_ip2v(ipp); | |
772 | if (!*inodep) | |
773 | error = -ENOMEM; | |
774 | gfs2_inode_put(ipp); | |
775 | } | |
b3b94faa DT |
776 | return error; |
777 | } | |
778 | ||
779 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino) | |
780 | { | |
5c676f6d | 781 | struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip; |
b3b94faa DT |
782 | struct buffer_head *bh; |
783 | struct gfs2_inum_range ir; | |
784 | int error; | |
785 | ||
786 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
787 | if (error) | |
788 | return error; | |
f55ab26a | 789 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
790 | |
791 | error = gfs2_meta_inode_buffer(ip, &bh); | |
792 | if (error) { | |
f55ab26a | 793 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
794 | gfs2_trans_end(sdp); |
795 | return error; | |
796 | } | |
797 | ||
798 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
799 | ||
800 | if (ir.ir_length) { | |
801 | *formal_ino = ir.ir_start++; | |
802 | ir.ir_length--; | |
d4e9c4c3 | 803 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
804 | gfs2_inum_range_out(&ir, |
805 | bh->b_data + sizeof(struct gfs2_dinode)); | |
806 | brelse(bh); | |
f55ab26a | 807 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
808 | gfs2_trans_end(sdp); |
809 | return 0; | |
810 | } | |
811 | ||
812 | brelse(bh); | |
813 | ||
f55ab26a | 814 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
815 | gfs2_trans_end(sdp); |
816 | ||
817 | return 1; | |
818 | } | |
819 | ||
820 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino) | |
821 | { | |
5c676f6d SW |
822 | struct gfs2_inode *ip = sdp->sd_ir_inode->u.generic_ip; |
823 | struct gfs2_inode *m_ip = sdp->sd_inum_inode->u.generic_ip; | |
b3b94faa DT |
824 | struct gfs2_holder gh; |
825 | struct buffer_head *bh; | |
826 | struct gfs2_inum_range ir; | |
827 | int error; | |
828 | ||
829 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); | |
830 | if (error) | |
831 | return error; | |
832 | ||
833 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
834 | if (error) | |
835 | goto out; | |
f55ab26a | 836 | mutex_lock(&sdp->sd_inum_mutex); |
b3b94faa DT |
837 | |
838 | error = gfs2_meta_inode_buffer(ip, &bh); | |
839 | if (error) | |
840 | goto out_end_trans; | |
841 | ||
842 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); | |
843 | ||
844 | if (!ir.ir_length) { | |
845 | struct buffer_head *m_bh; | |
846 | uint64_t x, y; | |
847 | ||
848 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
849 | if (error) | |
850 | goto out_brelse; | |
851 | ||
852 | x = *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)); | |
853 | x = y = be64_to_cpu(x); | |
854 | ir.ir_start = x; | |
855 | ir.ir_length = GFS2_INUM_QUANTUM; | |
856 | x += GFS2_INUM_QUANTUM; | |
857 | if (x < y) | |
858 | gfs2_consist_inode(m_ip); | |
859 | x = cpu_to_be64(x); | |
d4e9c4c3 | 860 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b3b94faa DT |
861 | *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = x; |
862 | ||
863 | brelse(m_bh); | |
864 | } | |
865 | ||
866 | *formal_ino = ir.ir_start++; | |
867 | ir.ir_length--; | |
868 | ||
d4e9c4c3 | 869 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
b3b94faa DT |
870 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
871 | ||
872 | out_brelse: | |
873 | brelse(bh); | |
874 | ||
875 | out_end_trans: | |
f55ab26a | 876 | mutex_unlock(&sdp->sd_inum_mutex); |
b3b94faa DT |
877 | gfs2_trans_end(sdp); |
878 | ||
879 | out: | |
880 | gfs2_glock_dq_uninit(&gh); | |
881 | ||
882 | return error; | |
883 | } | |
884 | ||
885 | static int pick_formal_ino(struct gfs2_sbd *sdp, uint64_t *inum) | |
886 | { | |
887 | int error; | |
888 | ||
889 | error = pick_formal_ino_1(sdp, inum); | |
890 | if (error <= 0) | |
891 | return error; | |
892 | ||
893 | error = pick_formal_ino_2(sdp, inum); | |
894 | ||
895 | return error; | |
896 | } | |
897 | ||
898 | /** | |
899 | * create_ok - OK to create a new on-disk inode here? | |
900 | * @dip: Directory in which dinode is to be created | |
901 | * @name: Name of new dinode | |
902 | * @mode: | |
903 | * | |
904 | * Returns: errno | |
905 | */ | |
906 | ||
907 | static int create_ok(struct gfs2_inode *dip, struct qstr *name, | |
908 | unsigned int mode) | |
909 | { | |
910 | int error; | |
911 | ||
912 | error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL); | |
913 | if (error) | |
914 | return error; | |
915 | ||
916 | /* Don't create entries in an unlinked directory */ | |
917 | if (!dip->i_di.di_nlink) | |
918 | return -EPERM; | |
919 | ||
920 | error = gfs2_dir_search(dip, name, NULL, NULL); | |
921 | switch (error) { | |
922 | case -ENOENT: | |
923 | error = 0; | |
924 | break; | |
925 | case 0: | |
926 | return -EEXIST; | |
927 | default: | |
928 | return error; | |
929 | } | |
930 | ||
931 | if (dip->i_di.di_entries == (uint32_t)-1) | |
932 | return -EFBIG; | |
933 | if (S_ISDIR(mode) && dip->i_di.di_nlink == (uint32_t)-1) | |
934 | return -EMLINK; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
939 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, | |
940 | unsigned int *uid, unsigned int *gid) | |
941 | { | |
942 | if (dip->i_sbd->sd_args.ar_suiddir && | |
943 | (dip->i_di.di_mode & S_ISUID) && | |
944 | dip->i_di.di_uid) { | |
945 | if (S_ISDIR(*mode)) | |
946 | *mode |= S_ISUID; | |
947 | else if (dip->i_di.di_uid != current->fsuid) | |
948 | *mode &= ~07111; | |
949 | *uid = dip->i_di.di_uid; | |
950 | } else | |
951 | *uid = current->fsuid; | |
952 | ||
953 | if (dip->i_di.di_mode & S_ISGID) { | |
954 | if (S_ISDIR(*mode)) | |
955 | *mode |= S_ISGID; | |
956 | *gid = dip->i_di.di_gid; | |
957 | } else | |
958 | *gid = current->fsgid; | |
959 | } | |
960 | ||
961 | static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_unlinked *ul) | |
962 | { | |
963 | struct gfs2_sbd *sdp = dip->i_sbd; | |
964 | int error; | |
965 | ||
966 | gfs2_alloc_get(dip); | |
967 | ||
968 | dip->i_alloc.al_requested = RES_DINODE; | |
969 | error = gfs2_inplace_reserve(dip); | |
970 | if (error) | |
971 | goto out; | |
972 | ||
973 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_UNLINKED + | |
974 | RES_STATFS, 0); | |
975 | if (error) | |
976 | goto out_ipreserv; | |
977 | ||
978 | ul->ul_ut.ut_inum.no_addr = gfs2_alloc_di(dip); | |
979 | ||
980 | ul->ul_ut.ut_flags = GFS2_UTF_UNINIT; | |
981 | error = gfs2_unlinked_ondisk_add(sdp, ul); | |
982 | ||
983 | gfs2_trans_end(sdp); | |
984 | ||
985 | out_ipreserv: | |
986 | gfs2_inplace_release(dip); | |
987 | ||
988 | out: | |
989 | gfs2_alloc_put(dip); | |
990 | ||
991 | return error; | |
992 | } | |
993 | ||
994 | /** | |
995 | * init_dinode - Fill in a new dinode structure | |
996 | * @dip: the directory this inode is being created in | |
997 | * @gl: The glock covering the new inode | |
998 | * @inum: the inode number | |
999 | * @mode: the file permissions | |
1000 | * @uid: | |
1001 | * @gid: | |
1002 | * | |
1003 | */ | |
1004 | ||
1005 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
1006 | struct gfs2_inum *inum, unsigned int mode, | |
1007 | unsigned int uid, unsigned int gid) | |
1008 | { | |
1009 | struct gfs2_sbd *sdp = dip->i_sbd; | |
b96ca4fa | 1010 | struct gfs2_dinode *di; |
b3b94faa DT |
1011 | struct buffer_head *dibh; |
1012 | ||
1013 | dibh = gfs2_meta_new(gl, inum->no_addr); | |
d4e9c4c3 | 1014 | gfs2_trans_add_bh(gl, dibh, 1); |
b3b94faa DT |
1015 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
1016 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); | |
b96ca4fa SW |
1017 | di = (struct gfs2_dinode *)dibh->b_data; |
1018 | ||
2442a098 SW |
1019 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
1020 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); | |
b96ca4fa SW |
1021 | di->di_mode = cpu_to_be32(mode); |
1022 | di->di_uid = cpu_to_be32(uid); | |
1023 | di->di_gid = cpu_to_be32(gid); | |
1024 | di->di_nlink = cpu_to_be32(0); | |
1025 | di->di_size = cpu_to_be64(0); | |
1026 | di->di_blocks = cpu_to_be64(1); | |
1027 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds()); | |
1028 | di->di_major = di->di_minor = cpu_to_be32(0); | |
1029 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); | |
1030 | di->__pad[0] = di->__pad[1] = 0; | |
1031 | di->di_flags = cpu_to_be32(0); | |
b3b94faa DT |
1032 | |
1033 | if (S_ISREG(mode)) { | |
1034 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || | |
1035 | gfs2_tune_get(sdp, gt_new_files_jdata)) | |
b96ca4fa | 1036 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
b3b94faa DT |
1037 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || |
1038 | gfs2_tune_get(sdp, gt_new_files_directio)) | |
b96ca4fa | 1039 | di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO); |
b3b94faa | 1040 | } else if (S_ISDIR(mode)) { |
568f4c96 SW |
1041 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
1042 | GFS2_DIF_INHERIT_DIRECTIO); | |
1043 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & | |
1044 | GFS2_DIF_INHERIT_JDATA); | |
b3b94faa DT |
1045 | } |
1046 | ||
b96ca4fa SW |
1047 | di->__pad1 = 0; |
1048 | di->di_height = cpu_to_be32(0); | |
1049 | di->__pad2 = 0; | |
1050 | di->__pad3 = 0; | |
1051 | di->di_depth = cpu_to_be16(0); | |
1052 | di->di_entries = cpu_to_be32(0); | |
1053 | memset(&di->__pad4, 0, sizeof(di->__pad4)); | |
1054 | di->di_eattr = cpu_to_be64(0); | |
1055 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); | |
1056 | ||
b3b94faa DT |
1057 | brelse(dibh); |
1058 | } | |
1059 | ||
1060 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, | |
1061 | unsigned int mode, struct gfs2_unlinked *ul) | |
1062 | { | |
1063 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1064 | unsigned int uid, gid; | |
1065 | int error; | |
1066 | ||
1067 | munge_mode_uid_gid(dip, &mode, &uid, &gid); | |
1068 | ||
1069 | gfs2_alloc_get(dip); | |
1070 | ||
1071 | error = gfs2_quota_lock(dip, uid, gid); | |
1072 | if (error) | |
1073 | goto out; | |
1074 | ||
1075 | error = gfs2_quota_check(dip, uid, gid); | |
1076 | if (error) | |
1077 | goto out_quota; | |
1078 | ||
1079 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_UNLINKED + | |
1080 | RES_QUOTA, 0); | |
1081 | if (error) | |
1082 | goto out_quota; | |
1083 | ||
1084 | ul->ul_ut.ut_flags = 0; | |
1085 | error = gfs2_unlinked_ondisk_munge(sdp, ul); | |
1086 | ||
1087 | init_dinode(dip, gl, &ul->ul_ut.ut_inum, | |
1088 | mode, uid, gid); | |
1089 | ||
1090 | gfs2_quota_change(dip, +1, uid, gid); | |
1091 | ||
1092 | gfs2_trans_end(sdp); | |
1093 | ||
1094 | out_quota: | |
1095 | gfs2_quota_unlock(dip); | |
1096 | ||
1097 | out: | |
1098 | gfs2_alloc_put(dip); | |
1099 | ||
1100 | return error; | |
1101 | } | |
1102 | ||
1103 | static int link_dinode(struct gfs2_inode *dip, struct qstr *name, | |
1104 | struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
1105 | { | |
1106 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1107 | struct gfs2_alloc *al; | |
1108 | int alloc_required; | |
1109 | struct buffer_head *dibh; | |
1110 | int error; | |
1111 | ||
1112 | al = gfs2_alloc_get(dip); | |
1113 | ||
1114 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); | |
1115 | if (error) | |
1116 | goto fail; | |
1117 | ||
1118 | error = gfs2_diradd_alloc_required(dip, name, &alloc_required); | |
1119 | if (alloc_required) { | |
1120 | error = gfs2_quota_check(dip, dip->i_di.di_uid, | |
1121 | dip->i_di.di_gid); | |
1122 | if (error) | |
1123 | goto fail_quota_locks; | |
1124 | ||
1125 | al->al_requested = sdp->sd_max_dirres; | |
1126 | ||
1127 | error = gfs2_inplace_reserve(dip); | |
1128 | if (error) | |
1129 | goto fail_quota_locks; | |
1130 | ||
1131 | error = gfs2_trans_begin(sdp, | |
1132 | sdp->sd_max_dirres + | |
1133 | al->al_rgd->rd_ri.ri_length + | |
1134 | 2 * RES_DINODE + RES_UNLINKED + | |
1135 | RES_STATFS + RES_QUOTA, 0); | |
1136 | if (error) | |
1137 | goto fail_ipreserv; | |
1138 | } else { | |
1139 | error = gfs2_trans_begin(sdp, | |
1140 | RES_LEAF + | |
1141 | 2 * RES_DINODE + | |
1142 | RES_UNLINKED, 0); | |
1143 | if (error) | |
1144 | goto fail_quota_locks; | |
1145 | } | |
1146 | ||
1147 | error = gfs2_dir_add(dip, name, &ip->i_num, IF2DT(ip->i_di.di_mode)); | |
1148 | if (error) | |
1149 | goto fail_end_trans; | |
1150 | ||
1151 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1152 | if (error) | |
1153 | goto fail_end_trans; | |
1154 | ip->i_di.di_nlink = 1; | |
d4e9c4c3 | 1155 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1156 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1157 | brelse(dibh); | |
1158 | ||
1159 | error = gfs2_unlinked_ondisk_rm(sdp, ul); | |
1160 | if (error) | |
1161 | goto fail_end_trans; | |
1162 | ||
1163 | return 0; | |
1164 | ||
1165 | fail_end_trans: | |
1166 | gfs2_trans_end(sdp); | |
1167 | ||
1168 | fail_ipreserv: | |
1169 | if (dip->i_alloc.al_rgd) | |
1170 | gfs2_inplace_release(dip); | |
1171 | ||
1172 | fail_quota_locks: | |
1173 | gfs2_quota_unlock(dip); | |
1174 | ||
1175 | fail: | |
1176 | gfs2_alloc_put(dip); | |
1177 | ||
1178 | return error; | |
1179 | } | |
1180 | ||
1181 | /** | |
1182 | * gfs2_createi - Create a new inode | |
1183 | * @ghs: An array of two holders | |
1184 | * @name: The name of the new file | |
1185 | * @mode: the permissions on the new inode | |
1186 | * | |
1187 | * @ghs[0] is an initialized holder for the directory | |
1188 | * @ghs[1] is the holder for the inode lock | |
1189 | * | |
7359a19c | 1190 | * If the return value is not NULL, the glocks on both the directory and the new |
b3b94faa DT |
1191 | * file are held. A transaction has been started and an inplace reservation |
1192 | * is held, as well. | |
1193 | * | |
7359a19c | 1194 | * Returns: An inode |
b3b94faa DT |
1195 | */ |
1196 | ||
568f4c96 SW |
1197 | struct inode *gfs2_createi(struct gfs2_holder *ghs, struct qstr *name, |
1198 | unsigned int mode) | |
b3b94faa | 1199 | { |
7359a19c | 1200 | struct inode *inode; |
5c676f6d | 1201 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
b3b94faa DT |
1202 | struct gfs2_sbd *sdp = dip->i_sbd; |
1203 | struct gfs2_unlinked *ul; | |
1204 | struct gfs2_inode *ip; | |
1205 | int error; | |
1206 | ||
1207 | if (!name->len || name->len > GFS2_FNAMESIZE) | |
7359a19c | 1208 | return ERR_PTR(-ENAMETOOLONG); |
b3b94faa DT |
1209 | |
1210 | error = gfs2_unlinked_get(sdp, &ul); | |
1211 | if (error) | |
7359a19c | 1212 | return ERR_PTR(error); |
b3b94faa DT |
1213 | |
1214 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); | |
1215 | error = gfs2_glock_nq(ghs); | |
1216 | if (error) | |
1217 | goto fail; | |
1218 | ||
1219 | error = create_ok(dip, name, mode); | |
1220 | if (error) | |
1221 | goto fail_gunlock; | |
1222 | ||
1223 | error = pick_formal_ino(sdp, &ul->ul_ut.ut_inum.no_formal_ino); | |
1224 | if (error) | |
1225 | goto fail_gunlock; | |
1226 | ||
1227 | error = alloc_dinode(dip, ul); | |
1228 | if (error) | |
1229 | goto fail_gunlock; | |
1230 | ||
1231 | if (ul->ul_ut.ut_inum.no_addr < dip->i_num.no_addr) { | |
1232 | gfs2_glock_dq(ghs); | |
1233 | ||
1234 | error = gfs2_glock_nq_num(sdp, | |
1235 | ul->ul_ut.ut_inum.no_addr, | |
1236 | &gfs2_inode_glops, | |
1237 | LM_ST_EXCLUSIVE, GL_SKIP, | |
1238 | ghs + 1); | |
1239 | if (error) { | |
1240 | gfs2_unlinked_put(sdp, ul); | |
7359a19c | 1241 | return ERR_PTR(error); |
b3b94faa DT |
1242 | } |
1243 | ||
1244 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); | |
1245 | error = gfs2_glock_nq(ghs); | |
1246 | if (error) { | |
1247 | gfs2_glock_dq_uninit(ghs + 1); | |
1248 | gfs2_unlinked_put(sdp, ul); | |
7359a19c | 1249 | return ERR_PTR(error); |
b3b94faa DT |
1250 | } |
1251 | ||
1252 | error = create_ok(dip, name, mode); | |
1253 | if (error) | |
1254 | goto fail_gunlock2; | |
1255 | } else { | |
1256 | error = gfs2_glock_nq_num(sdp, | |
1257 | ul->ul_ut.ut_inum.no_addr, | |
1258 | &gfs2_inode_glops, | |
1259 | LM_ST_EXCLUSIVE, GL_SKIP, | |
1260 | ghs + 1); | |
1261 | if (error) | |
1262 | goto fail_gunlock; | |
1263 | } | |
1264 | ||
1265 | error = make_dinode(dip, ghs[1].gh_gl, mode, ul); | |
1266 | if (error) | |
1267 | goto fail_gunlock2; | |
1268 | ||
1269 | error = gfs2_inode_get(ghs[1].gh_gl, &ul->ul_ut.ut_inum, CREATE, &ip); | |
1270 | if (error) | |
1271 | goto fail_gunlock2; | |
1272 | ||
1273 | error = gfs2_inode_refresh(ip); | |
1274 | if (error) | |
1275 | goto fail_iput; | |
1276 | ||
1277 | error = gfs2_acl_create(dip, ip); | |
1278 | if (error) | |
1279 | goto fail_iput; | |
1280 | ||
1281 | error = link_dinode(dip, name, ip, ul); | |
1282 | if (error) | |
1283 | goto fail_iput; | |
1284 | ||
1285 | gfs2_unlinked_put(sdp, ul); | |
1286 | ||
7359a19c SW |
1287 | inode = gfs2_ip2v(ip); |
1288 | gfs2_inode_put(ip); | |
1289 | if (!inode) | |
1290 | return ERR_PTR(-ENOMEM); | |
1291 | return inode; | |
b3b94faa DT |
1292 | |
1293 | fail_iput: | |
1294 | gfs2_inode_put(ip); | |
1295 | ||
1296 | fail_gunlock2: | |
1297 | gfs2_glock_dq_uninit(ghs + 1); | |
1298 | ||
1299 | fail_gunlock: | |
1300 | gfs2_glock_dq(ghs); | |
1301 | ||
1302 | fail: | |
1303 | gfs2_unlinked_put(sdp, ul); | |
1304 | ||
7359a19c | 1305 | return ERR_PTR(error); |
b3b94faa DT |
1306 | } |
1307 | ||
1308 | /** | |
1309 | * gfs2_unlinki - Unlink a file | |
1310 | * @dip: The inode of the directory | |
1311 | * @name: The name of the file to be unlinked | |
1312 | * @ip: The inode of the file to be removed | |
1313 | * | |
1314 | * Assumes Glocks on both dip and ip are held. | |
1315 | * | |
1316 | * Returns: errno | |
1317 | */ | |
1318 | ||
1319 | int gfs2_unlinki(struct gfs2_inode *dip, struct qstr *name, | |
1320 | struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
1321 | { | |
1322 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1323 | int error; | |
1324 | ||
1325 | error = gfs2_dir_del(dip, name); | |
1326 | if (error) | |
1327 | return error; | |
1328 | ||
1329 | error = gfs2_change_nlink(ip, -1); | |
1330 | if (error) | |
1331 | return error; | |
1332 | ||
1333 | /* If this inode is being unlinked from the directory structure, | |
1334 | we need to mark that in the log so that it isn't lost during | |
1335 | a crash. */ | |
1336 | ||
1337 | if (!ip->i_di.di_nlink) { | |
1338 | ul->ul_ut.ut_inum = ip->i_num; | |
1339 | error = gfs2_unlinked_ondisk_add(sdp, ul); | |
1340 | if (!error) | |
1341 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
1342 | } | |
1343 | ||
1344 | return error; | |
1345 | } | |
1346 | ||
1347 | /** | |
1348 | * gfs2_rmdiri - Remove a directory | |
1349 | * @dip: The parent directory of the directory to be removed | |
1350 | * @name: The name of the directory to be removed | |
1351 | * @ip: The GFS2 inode of the directory to be removed | |
1352 | * | |
1353 | * Assumes Glocks on dip and ip are held | |
1354 | * | |
1355 | * Returns: errno | |
1356 | */ | |
1357 | ||
1358 | int gfs2_rmdiri(struct gfs2_inode *dip, struct qstr *name, | |
1359 | struct gfs2_inode *ip, struct gfs2_unlinked *ul) | |
1360 | { | |
1361 | struct gfs2_sbd *sdp = dip->i_sbd; | |
1362 | struct qstr dotname; | |
1363 | int error; | |
1364 | ||
1365 | if (ip->i_di.di_entries != 2) { | |
1366 | if (gfs2_consist_inode(ip)) | |
1367 | gfs2_dinode_print(&ip->i_di); | |
1368 | return -EIO; | |
1369 | } | |
1370 | ||
1371 | error = gfs2_dir_del(dip, name); | |
1372 | if (error) | |
1373 | return error; | |
1374 | ||
1375 | error = gfs2_change_nlink(dip, -1); | |
1376 | if (error) | |
1377 | return error; | |
1378 | ||
1379 | dotname.len = 1; | |
1380 | dotname.name = "."; | |
1381 | error = gfs2_dir_del(ip, &dotname); | |
1382 | if (error) | |
1383 | return error; | |
1384 | ||
1385 | dotname.len = 2; | |
1386 | dotname.name = ".."; | |
1387 | error = gfs2_dir_del(ip, &dotname); | |
1388 | if (error) | |
1389 | return error; | |
1390 | ||
1391 | error = gfs2_change_nlink(ip, -2); | |
1392 | if (error) | |
1393 | return error; | |
1394 | ||
1395 | /* This inode is being unlinked from the directory structure and | |
1396 | we need to mark that in the log so that it isn't lost during | |
1397 | a crash. */ | |
1398 | ||
1399 | ul->ul_ut.ut_inum = ip->i_num; | |
1400 | error = gfs2_unlinked_ondisk_add(sdp, ul); | |
1401 | if (!error) | |
1402 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); | |
1403 | ||
1404 | return error; | |
1405 | } | |
1406 | ||
1407 | /* | |
1408 | * gfs2_unlink_ok - check to see that a inode is still in a directory | |
1409 | * @dip: the directory | |
1410 | * @name: the name of the file | |
1411 | * @ip: the inode | |
1412 | * | |
1413 | * Assumes that the lock on (at least) @dip is held. | |
1414 | * | |
1415 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't | |
1416 | */ | |
1417 | ||
1418 | int gfs2_unlink_ok(struct gfs2_inode *dip, struct qstr *name, | |
1419 | struct gfs2_inode *ip) | |
1420 | { | |
1421 | struct gfs2_inum inum; | |
1422 | unsigned int type; | |
1423 | int error; | |
1424 | ||
1425 | if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode)) | |
1426 | return -EPERM; | |
1427 | ||
1428 | if ((dip->i_di.di_mode & S_ISVTX) && | |
1429 | dip->i_di.di_uid != current->fsuid && | |
1430 | ip->i_di.di_uid != current->fsuid && | |
1431 | !capable(CAP_FOWNER)) | |
1432 | return -EPERM; | |
1433 | ||
1434 | if (IS_APPEND(dip->i_vnode)) | |
1435 | return -EPERM; | |
1436 | ||
1437 | error = gfs2_repermission(dip->i_vnode, MAY_WRITE | MAY_EXEC, NULL); | |
1438 | if (error) | |
1439 | return error; | |
1440 | ||
1441 | error = gfs2_dir_search(dip, name, &inum, &type); | |
1442 | if (error) | |
1443 | return error; | |
1444 | ||
1445 | if (!gfs2_inum_equal(&inum, &ip->i_num)) | |
1446 | return -ENOENT; | |
1447 | ||
1448 | if (IF2DT(ip->i_di.di_mode) != type) { | |
1449 | gfs2_consist_inode(dip); | |
1450 | return -EIO; | |
1451 | } | |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | /* | |
1457 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory | |
1458 | * @this: move this | |
1459 | * @to: to here | |
1460 | * | |
1461 | * Follow @to back to the root and make sure we don't encounter @this | |
1462 | * Assumes we already hold the rename lock. | |
1463 | * | |
1464 | * Returns: errno | |
1465 | */ | |
1466 | ||
1467 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) | |
1468 | { | |
1469 | struct gfs2_sbd *sdp = this->i_sbd; | |
7359a19c SW |
1470 | struct inode *dir = to->i_vnode; |
1471 | struct inode *tmp; | |
b3b94faa DT |
1472 | struct qstr dotdot; |
1473 | int error = 0; | |
1474 | ||
1475 | memset(&dotdot, 0, sizeof(struct qstr)); | |
1476 | dotdot.name = ".."; | |
1477 | dotdot.len = 2; | |
1478 | ||
7359a19c | 1479 | igrab(dir); |
b3b94faa DT |
1480 | |
1481 | for (;;) { | |
7359a19c | 1482 | if (dir == this->i_vnode) { |
b3b94faa DT |
1483 | error = -EINVAL; |
1484 | break; | |
1485 | } | |
7359a19c | 1486 | if (dir == sdp->sd_root_dir) { |
b3b94faa DT |
1487 | error = 0; |
1488 | break; | |
1489 | } | |
1490 | ||
7359a19c | 1491 | error = gfs2_lookupi(dir, &dotdot, 1, &tmp); |
b3b94faa DT |
1492 | if (error) |
1493 | break; | |
1494 | ||
7359a19c SW |
1495 | iput(dir); |
1496 | dir = tmp; | |
b3b94faa DT |
1497 | } |
1498 | ||
7359a19c | 1499 | iput(dir); |
b3b94faa DT |
1500 | |
1501 | return error; | |
1502 | } | |
1503 | ||
1504 | /** | |
1505 | * gfs2_readlinki - return the contents of a symlink | |
1506 | * @ip: the symlink's inode | |
1507 | * @buf: a pointer to the buffer to be filled | |
1508 | * @len: a pointer to the length of @buf | |
1509 | * | |
1510 | * If @buf is too small, a piece of memory is kmalloc()ed and needs | |
1511 | * to be freed by the caller. | |
1512 | * | |
1513 | * Returns: errno | |
1514 | */ | |
1515 | ||
1516 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) | |
1517 | { | |
1518 | struct gfs2_holder i_gh; | |
1519 | struct buffer_head *dibh; | |
1520 | unsigned int x; | |
1521 | int error; | |
1522 | ||
1523 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); | |
1524 | error = gfs2_glock_nq_atime(&i_gh); | |
1525 | if (error) { | |
1526 | gfs2_holder_uninit(&i_gh); | |
1527 | return error; | |
1528 | } | |
1529 | ||
1530 | if (!ip->i_di.di_size) { | |
1531 | gfs2_consist_inode(ip); | |
1532 | error = -EIO; | |
1533 | goto out; | |
1534 | } | |
1535 | ||
1536 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1537 | if (error) | |
1538 | goto out; | |
1539 | ||
1540 | x = ip->i_di.di_size + 1; | |
1541 | if (x > *len) { | |
1542 | *buf = kmalloc(x, GFP_KERNEL); | |
1543 | if (!*buf) { | |
1544 | error = -ENOMEM; | |
1545 | goto out_brelse; | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); | |
1550 | *len = x; | |
1551 | ||
1552 | out_brelse: | |
1553 | brelse(dibh); | |
1554 | ||
1555 | out: | |
1556 | gfs2_glock_dq_uninit(&i_gh); | |
1557 | ||
1558 | return error; | |
1559 | } | |
1560 | ||
1561 | /** | |
1562 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and | |
1563 | * conditionally update the inode's atime | |
1564 | * @gh: the holder to acquire | |
1565 | * | |
1566 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap | |
1567 | * Update if the difference between the current time and the inode's current | |
1568 | * atime is greater than an interval specified at mount. | |
1569 | * | |
1570 | * Returns: errno | |
1571 | */ | |
1572 | ||
1573 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) | |
1574 | { | |
1575 | struct gfs2_glock *gl = gh->gh_gl; | |
1576 | struct gfs2_sbd *sdp = gl->gl_sbd; | |
5c676f6d | 1577 | struct gfs2_inode *ip = gl->gl_object; |
b3b94faa DT |
1578 | int64_t curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum); |
1579 | unsigned int state; | |
1580 | int flags; | |
1581 | int error; | |
1582 | ||
1583 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || | |
1584 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || | |
1585 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) | |
1586 | return -EINVAL; | |
1587 | ||
1588 | state = gh->gh_state; | |
1589 | flags = gh->gh_flags; | |
1590 | ||
1591 | error = gfs2_glock_nq(gh); | |
1592 | if (error) | |
1593 | return error; | |
1594 | ||
1595 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || | |
1596 | (sdp->sd_vfs->s_flags & MS_RDONLY)) | |
1597 | return 0; | |
1598 | ||
1599 | curtime = get_seconds(); | |
1600 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1601 | gfs2_glock_dq(gh); | |
1602 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, | |
1603 | gh->gh_flags & ~LM_FLAG_ANY, | |
1604 | gh); | |
1605 | error = gfs2_glock_nq(gh); | |
1606 | if (error) | |
1607 | return error; | |
1608 | ||
1609 | /* Verify that atime hasn't been updated while we were | |
1610 | trying to get exclusive lock. */ | |
1611 | ||
1612 | curtime = get_seconds(); | |
1613 | if (curtime - ip->i_di.di_atime >= quantum) { | |
1614 | struct buffer_head *dibh; | |
1615 | ||
1616 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); | |
1617 | if (error == -EROFS) | |
1618 | return 0; | |
1619 | if (error) | |
1620 | goto fail; | |
1621 | ||
1622 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1623 | if (error) | |
1624 | goto fail_end_trans; | |
1625 | ||
1626 | ip->i_di.di_atime = curtime; | |
1627 | ||
d4e9c4c3 | 1628 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1629 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1630 | brelse(dibh); | |
1631 | ||
1632 | gfs2_trans_end(sdp); | |
1633 | } | |
1634 | ||
1635 | /* If someone else has asked for the glock, | |
1636 | unlock and let them have it. Then reacquire | |
1637 | in the original state. */ | |
1638 | if (gfs2_glock_is_blocking(gl)) { | |
1639 | gfs2_glock_dq(gh); | |
1640 | gfs2_holder_reinit(state, flags, gh); | |
1641 | return gfs2_glock_nq(gh); | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | return 0; | |
1646 | ||
1647 | fail_end_trans: | |
1648 | gfs2_trans_end(sdp); | |
1649 | ||
1650 | fail: | |
1651 | gfs2_glock_dq(gh); | |
1652 | ||
1653 | return error; | |
1654 | } | |
1655 | ||
1656 | /** | |
1657 | * glock_compare_atime - Compare two struct gfs2_glock structures for sort | |
1658 | * @arg_a: the first structure | |
1659 | * @arg_b: the second structure | |
1660 | * | |
1661 | * Returns: 1 if A > B | |
1662 | * -1 if A < B | |
1663 | * 0 if A = B | |
1664 | */ | |
1665 | ||
1666 | static int glock_compare_atime(const void *arg_a, const void *arg_b) | |
1667 | { | |
1668 | struct gfs2_holder *gh_a = *(struct gfs2_holder **)arg_a; | |
1669 | struct gfs2_holder *gh_b = *(struct gfs2_holder **)arg_b; | |
1670 | struct lm_lockname *a = &gh_a->gh_gl->gl_name; | |
1671 | struct lm_lockname *b = &gh_b->gh_gl->gl_name; | |
1672 | int ret = 0; | |
1673 | ||
1674 | if (a->ln_number > b->ln_number) | |
1675 | ret = 1; | |
1676 | else if (a->ln_number < b->ln_number) | |
1677 | ret = -1; | |
1678 | else { | |
1679 | if (gh_a->gh_state == LM_ST_SHARED && | |
1680 | gh_b->gh_state == LM_ST_EXCLUSIVE) | |
1681 | ret = 1; | |
1682 | else if (gh_a->gh_state == LM_ST_SHARED && | |
1683 | (gh_b->gh_flags & GL_ATIME)) | |
1684 | ret = 1; | |
1685 | } | |
1686 | ||
1687 | return ret; | |
1688 | } | |
1689 | ||
1690 | /** | |
1691 | * gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an | |
1692 | * atime update | |
1693 | * @num_gh: the number of structures | |
1694 | * @ghs: an array of struct gfs2_holder structures | |
1695 | * | |
1696 | * Returns: 0 on success (all glocks acquired), | |
1697 | * errno on failure (no glocks acquired) | |
1698 | */ | |
1699 | ||
1700 | int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs) | |
1701 | { | |
1702 | struct gfs2_holder **p; | |
1703 | unsigned int x; | |
1704 | int error = 0; | |
1705 | ||
1706 | if (!num_gh) | |
1707 | return 0; | |
1708 | ||
1709 | if (num_gh == 1) { | |
1710 | ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1711 | if (ghs->gh_flags & GL_ATIME) | |
1712 | error = gfs2_glock_nq_atime(ghs); | |
1713 | else | |
1714 | error = gfs2_glock_nq(ghs); | |
1715 | return error; | |
1716 | } | |
1717 | ||
1718 | p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL); | |
1719 | if (!p) | |
1720 | return -ENOMEM; | |
1721 | ||
1722 | for (x = 0; x < num_gh; x++) | |
1723 | p[x] = &ghs[x]; | |
1724 | ||
1725 | sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL); | |
1726 | ||
1727 | for (x = 0; x < num_gh; x++) { | |
1728 | p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC); | |
1729 | ||
1730 | if (p[x]->gh_flags & GL_ATIME) | |
1731 | error = gfs2_glock_nq_atime(p[x]); | |
1732 | else | |
1733 | error = gfs2_glock_nq(p[x]); | |
1734 | ||
1735 | if (error) { | |
1736 | while (x--) | |
1737 | gfs2_glock_dq(p[x]); | |
1738 | break; | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | kfree(p); | |
1743 | ||
1744 | return error; | |
1745 | } | |
1746 | ||
1747 | /** | |
1748 | * gfs2_try_toss_vnode - See if we can toss a vnode from memory | |
1749 | * @ip: the inode | |
1750 | * | |
1751 | * Returns: 1 if the vnode was tossed | |
1752 | */ | |
1753 | ||
1754 | void gfs2_try_toss_vnode(struct gfs2_inode *ip) | |
1755 | { | |
1756 | struct inode *inode; | |
1757 | ||
1758 | inode = gfs2_ip2v_lookup(ip); | |
1759 | if (!inode) | |
1760 | return; | |
1761 | ||
1762 | d_prune_aliases(inode); | |
1763 | ||
1764 | if (S_ISDIR(ip->i_di.di_mode)) { | |
1765 | struct list_head *head = &inode->i_dentry; | |
1766 | struct dentry *d = NULL; | |
1767 | ||
1768 | spin_lock(&dcache_lock); | |
1769 | if (list_empty(head)) | |
1770 | spin_unlock(&dcache_lock); | |
1771 | else { | |
1772 | d = list_entry(head->next, struct dentry, d_alias); | |
1773 | dget_locked(d); | |
1774 | spin_unlock(&dcache_lock); | |
1775 | ||
1776 | if (have_submounts(d)) | |
1777 | dput(d); | |
1778 | else { | |
1779 | shrink_dcache_parent(d); | |
1780 | dput(d); | |
1781 | d_prune_aliases(inode); | |
1782 | } | |
1783 | } | |
1784 | } | |
1785 | ||
1786 | inode->i_nlink = 0; | |
1787 | iput(inode); | |
1788 | } | |
1789 | ||
1790 | ||
1791 | static int | |
1792 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1793 | { | |
1794 | struct buffer_head *dibh; | |
1795 | int error; | |
1796 | ||
1797 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
1798 | if (!error) { | |
1799 | error = inode_setattr(ip->i_vnode, attr); | |
1800 | gfs2_assert_warn(ip->i_sbd, !error); | |
1801 | gfs2_inode_attr_out(ip); | |
1802 | ||
d4e9c4c3 | 1803 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
b3b94faa DT |
1804 | gfs2_dinode_out(&ip->i_di, dibh->b_data); |
1805 | brelse(dibh); | |
1806 | } | |
1807 | return error; | |
1808 | } | |
1809 | ||
1810 | /** | |
1811 | * gfs2_setattr_simple - | |
1812 | * @ip: | |
1813 | * @attr: | |
1814 | * | |
1815 | * Called with a reference on the vnode. | |
1816 | * | |
1817 | * Returns: errno | |
1818 | */ | |
1819 | ||
1820 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) | |
1821 | { | |
1822 | int error; | |
1823 | ||
5c676f6d | 1824 | if (current->journal_info) |
b3b94faa DT |
1825 | return __gfs2_setattr_simple(ip, attr); |
1826 | ||
1827 | error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0); | |
1828 | if (error) | |
1829 | return error; | |
1830 | ||
1831 | error = __gfs2_setattr_simple(ip, attr); | |
1832 | ||
1833 | gfs2_trans_end(ip->i_sbd); | |
1834 | ||
1835 | return error; | |
1836 | } | |
1837 | ||
1838 | int gfs2_repermission(struct inode *inode, int mask, struct nameidata *nd) | |
1839 | { | |
1840 | return permission(inode, mask, nd); | |
1841 | } | |
1842 |