Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* -*- c -*- --------------------------------------------------------------- * |
2 | * | |
3 | * linux/fs/autofs/expire.c | |
4 | * | |
5 | * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved | |
6 | * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org> | |
3a15e2ab | 7 | * Copyright 2001-2006 Ian Kent <raven@themaw.net> |
1da177e4 LT |
8 | * |
9 | * This file is part of the Linux kernel and is made available under | |
10 | * the terms of the GNU General Public License, version 2, or at your | |
11 | * option, any later version, incorporated herein by reference. | |
12 | * | |
13 | * ------------------------------------------------------------------------- */ | |
14 | ||
15 | #include "autofs_i.h" | |
16 | ||
17 | static unsigned long now; | |
18 | ||
1f5f2c30 | 19 | /* Check if a dentry can be expired */ |
1da177e4 LT |
20 | static inline int autofs4_can_expire(struct dentry *dentry, |
21 | unsigned long timeout, int do_now) | |
22 | { | |
23 | struct autofs_info *ino = autofs4_dentry_ino(dentry); | |
24 | ||
25 | /* dentry in the process of being deleted */ | |
26 | if (ino == NULL) | |
27 | return 0; | |
28 | ||
1da177e4 LT |
29 | if (!do_now) { |
30 | /* Too young to die */ | |
c0ba7e51 | 31 | if (!timeout || time_after(ino->last_used + timeout, now)) |
1da177e4 LT |
32 | return 0; |
33 | ||
34 | /* update last_used here :- | |
35 | - obviously makes sense if it is in use now | |
36 | - less obviously, prevents rapid-fire expire | |
37 | attempts if expire fails the first time */ | |
38 | ino->last_used = now; | |
39 | } | |
1da177e4 LT |
40 | return 1; |
41 | } | |
42 | ||
1f5f2c30 IK |
43 | /* Check a mount point for busyness */ |
44 | static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry) | |
1da177e4 | 45 | { |
e0a7aae9 | 46 | struct dentry *top = dentry; |
9393bd07 | 47 | struct path path = {.mnt = mnt, .dentry = dentry}; |
1f5f2c30 | 48 | int status = 1; |
1da177e4 LT |
49 | |
50 | DPRINTK("dentry %p %.*s", | |
51 | dentry, (int)dentry->d_name.len, dentry->d_name.name); | |
52 | ||
9393bd07 | 53 | path_get(&path); |
1da177e4 | 54 | |
cc53ce53 | 55 | if (!follow_down_one(&path)) |
1da177e4 LT |
56 | goto done; |
57 | ||
9393bd07 AV |
58 | if (is_autofs4_dentry(path.dentry)) { |
59 | struct autofs_sb_info *sbi = autofs4_sbi(path.dentry->d_sb); | |
bc9c4068 IK |
60 | |
61 | /* This is an autofs submount, we can't expire it */ | |
a92daf6b | 62 | if (autofs_type_indirect(sbi->type)) |
bc9c4068 IK |
63 | goto done; |
64 | ||
65 | /* | |
66 | * Otherwise it's an offset mount and we need to check | |
67 | * if we can umount its mount, if there is one. | |
68 | */ | |
9393bd07 | 69 | if (!d_mountpoint(path.dentry)) { |
a8985f3a | 70 | status = 0; |
bc9c4068 | 71 | goto done; |
a8985f3a | 72 | } |
bc9c4068 | 73 | } |
1da177e4 | 74 | |
e0a7aae9 | 75 | /* Update the expiry counter if fs is busy */ |
37d0892c | 76 | if (!may_umount_tree(path.mnt)) { |
e0a7aae9 IK |
77 | struct autofs_info *ino = autofs4_dentry_ino(top); |
78 | ino->last_used = jiffies; | |
79 | goto done; | |
80 | } | |
81 | ||
82 | status = 0; | |
1da177e4 LT |
83 | done: |
84 | DPRINTK("returning = %d", status); | |
9393bd07 | 85 | path_put(&path); |
1da177e4 LT |
86 | return status; |
87 | } | |
88 | ||
d4a85e35 IK |
89 | /* |
90 | * Calculate and dget next entry in the subdirs list under root. | |
91 | */ | |
92 | static struct dentry *get_next_positive_subdir(struct dentry *prev, | |
93 | struct dentry *root) | |
94 | { | |
e7854723 | 95 | struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); |
d4a85e35 | 96 | struct list_head *next; |
a45440f0 | 97 | struct dentry *q; |
d4a85e35 | 98 | |
e7854723 | 99 | spin_lock(&sbi->lookup_lock); |
a45440f0 | 100 | spin_lock(&root->d_lock); |
d4a85e35 | 101 | |
a45440f0 IK |
102 | if (prev) |
103 | next = prev->d_u.d_child.next; | |
104 | else { | |
d4a85e35 IK |
105 | prev = dget_dlock(root); |
106 | next = prev->d_subdirs.next; | |
d4a85e35 IK |
107 | } |
108 | ||
a45440f0 | 109 | cont: |
d4a85e35 | 110 | if (next == &root->d_subdirs) { |
a45440f0 | 111 | spin_unlock(&root->d_lock); |
e7854723 | 112 | spin_unlock(&sbi->lookup_lock); |
d4a85e35 IK |
113 | dput(prev); |
114 | return NULL; | |
115 | } | |
116 | ||
117 | q = list_entry(next, struct dentry, d_u.d_child); | |
118 | ||
119 | spin_lock_nested(&q->d_lock, DENTRY_D_LOCK_NESTED); | |
a45440f0 IK |
120 | /* Already gone or negative dentry (under construction) - try next */ |
121 | if (q->d_count == 0 || !simple_positive(q)) { | |
122 | spin_unlock(&q->d_lock); | |
123 | next = q->d_u.d_child.next; | |
124 | goto cont; | |
d4a85e35 IK |
125 | } |
126 | dget_dlock(q); | |
127 | spin_unlock(&q->d_lock); | |
a45440f0 | 128 | spin_unlock(&root->d_lock); |
e7854723 | 129 | spin_unlock(&sbi->lookup_lock); |
d4a85e35 IK |
130 | |
131 | dput(prev); | |
132 | ||
133 | return q; | |
134 | } | |
135 | ||
1ce12bad | 136 | /* |
2fd6b7f5 | 137 | * Calculate and dget next entry in top down tree traversal. |
1ce12bad | 138 | */ |
2fd6b7f5 NP |
139 | static struct dentry *get_next_positive_dentry(struct dentry *prev, |
140 | struct dentry *root) | |
1ce12bad | 141 | { |
e7854723 | 142 | struct autofs_sb_info *sbi = autofs4_sbi(root->d_sb); |
2fd6b7f5 NP |
143 | struct list_head *next; |
144 | struct dentry *p, *ret; | |
145 | ||
146 | if (prev == NULL) | |
c14cc63a | 147 | return dget(root); |
1ce12bad | 148 | |
e7854723 | 149 | spin_lock(&sbi->lookup_lock); |
2fd6b7f5 NP |
150 | relock: |
151 | p = prev; | |
152 | spin_lock(&p->d_lock); | |
153 | again: | |
154 | next = p->d_subdirs.next; | |
1ce12bad IK |
155 | if (next == &p->d_subdirs) { |
156 | while (1) { | |
2fd6b7f5 NP |
157 | struct dentry *parent; |
158 | ||
159 | if (p == root) { | |
160 | spin_unlock(&p->d_lock); | |
e7854723 | 161 | spin_unlock(&sbi->lookup_lock); |
2fd6b7f5 | 162 | dput(prev); |
1ce12bad | 163 | return NULL; |
2fd6b7f5 NP |
164 | } |
165 | ||
166 | parent = p->d_parent; | |
167 | if (!spin_trylock(&parent->d_lock)) { | |
168 | spin_unlock(&p->d_lock); | |
169 | cpu_relax(); | |
170 | goto relock; | |
171 | } | |
172 | spin_unlock(&p->d_lock); | |
1ce12bad | 173 | next = p->d_u.d_child.next; |
2fd6b7f5 NP |
174 | p = parent; |
175 | if (next != &parent->d_subdirs) | |
1ce12bad | 176 | break; |
1ce12bad IK |
177 | } |
178 | } | |
2fd6b7f5 NP |
179 | ret = list_entry(next, struct dentry, d_u.d_child); |
180 | ||
181 | spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED); | |
182 | /* Negative dentry - try next */ | |
183 | if (!simple_positive(ret)) { | |
c14cc63a | 184 | spin_unlock(&p->d_lock); |
1d6f2097 | 185 | lock_set_subclass(&ret->d_lock.dep_map, 0, _RET_IP_); |
2fd6b7f5 NP |
186 | p = ret; |
187 | goto again; | |
188 | } | |
189 | dget_dlock(ret); | |
190 | spin_unlock(&ret->d_lock); | |
191 | spin_unlock(&p->d_lock); | |
e7854723 | 192 | spin_unlock(&sbi->lookup_lock); |
2fd6b7f5 NP |
193 | |
194 | dput(prev); | |
195 | ||
196 | return ret; | |
1ce12bad IK |
197 | } |
198 | ||
3a15e2ab IK |
199 | /* |
200 | * Check a direct mount point for busyness. | |
201 | * Direct mounts have similar expiry semantics to tree mounts. | |
202 | * The tree is not busy iff no mountpoints are busy and there are no | |
203 | * autofs submounts. | |
204 | */ | |
205 | static int autofs4_direct_busy(struct vfsmount *mnt, | |
206 | struct dentry *top, | |
207 | unsigned long timeout, | |
208 | int do_now) | |
209 | { | |
210 | DPRINTK("top %p %.*s", | |
211 | top, (int) top->d_name.len, top->d_name.name); | |
212 | ||
3a15e2ab IK |
213 | /* If it's busy update the expiry counters */ |
214 | if (!may_umount_tree(mnt)) { | |
215 | struct autofs_info *ino = autofs4_dentry_ino(top); | |
216 | if (ino) | |
217 | ino->last_used = jiffies; | |
218 | return 1; | |
219 | } | |
220 | ||
221 | /* Timeout of a direct mount is determined by its top dentry */ | |
222 | if (!autofs4_can_expire(top, timeout, do_now)) | |
223 | return 1; | |
224 | ||
225 | return 0; | |
226 | } | |
227 | ||
1da177e4 LT |
228 | /* Check a directory tree of mount points for busyness |
229 | * The tree is not busy iff no mountpoints are busy | |
1da177e4 | 230 | */ |
1f5f2c30 IK |
231 | static int autofs4_tree_busy(struct vfsmount *mnt, |
232 | struct dentry *top, | |
233 | unsigned long timeout, | |
234 | int do_now) | |
1da177e4 | 235 | { |
e0a7aae9 | 236 | struct autofs_info *top_ino = autofs4_dentry_ino(top); |
1ce12bad | 237 | struct dentry *p; |
1da177e4 | 238 | |
1f5f2c30 | 239 | DPRINTK("top %p %.*s", |
1da177e4 LT |
240 | top, (int)top->d_name.len, top->d_name.name); |
241 | ||
242 | /* Negative dentry - give up */ | |
243 | if (!simple_positive(top)) | |
1f5f2c30 | 244 | return 1; |
1da177e4 | 245 | |
2fd6b7f5 NP |
246 | p = NULL; |
247 | while ((p = get_next_positive_dentry(p, top))) { | |
1da177e4 | 248 | DPRINTK("dentry %p %.*s", |
1ce12bad | 249 | p, (int) p->d_name.len, p->d_name.name); |
1da177e4 | 250 | |
1aff3c8b IK |
251 | /* |
252 | * Is someone visiting anywhere in the subtree ? | |
253 | * If there's no mount we need to check the usage | |
254 | * count for the autofs dentry. | |
e0a7aae9 | 255 | * If the fs is busy update the expiry counter. |
1aff3c8b | 256 | */ |
1ce12bad | 257 | if (d_mountpoint(p)) { |
1ce12bad | 258 | if (autofs4_mount_busy(mnt, p)) { |
e0a7aae9 | 259 | top_ino->last_used = jiffies; |
1ce12bad | 260 | dput(p); |
1f5f2c30 | 261 | return 1; |
1da177e4 | 262 | } |
1aff3c8b | 263 | } else { |
e0a7aae9 | 264 | struct autofs_info *ino = autofs4_dentry_ino(p); |
1aff3c8b IK |
265 | unsigned int ino_count = atomic_read(&ino->count); |
266 | ||
f9022f66 IK |
267 | /* |
268 | * Clean stale dentries below that have not been | |
269 | * invalidated after a mount fail during lookup | |
270 | */ | |
271 | d_invalidate(p); | |
272 | ||
1aff3c8b IK |
273 | /* allow for dget above and top is already dgot */ |
274 | if (p == top) | |
275 | ino_count += 2; | |
276 | else | |
277 | ino_count++; | |
278 | ||
b7ab39f6 | 279 | if (p->d_count > ino_count) { |
e0a7aae9 | 280 | top_ino->last_used = jiffies; |
1aff3c8b IK |
281 | dput(p); |
282 | return 1; | |
283 | } | |
1da177e4 | 284 | } |
1da177e4 | 285 | } |
1aff3c8b IK |
286 | |
287 | /* Timeout of a tree mount is ultimately determined by its top dentry */ | |
288 | if (!autofs4_can_expire(top, timeout, do_now)) | |
289 | return 1; | |
290 | ||
1f5f2c30 | 291 | return 0; |
1da177e4 LT |
292 | } |
293 | ||
294 | static struct dentry *autofs4_check_leaves(struct vfsmount *mnt, | |
295 | struct dentry *parent, | |
296 | unsigned long timeout, | |
297 | int do_now) | |
298 | { | |
1ce12bad | 299 | struct dentry *p; |
1da177e4 LT |
300 | |
301 | DPRINTK("parent %p %.*s", | |
302 | parent, (int)parent->d_name.len, parent->d_name.name); | |
303 | ||
2fd6b7f5 NP |
304 | p = NULL; |
305 | while ((p = get_next_positive_dentry(p, parent))) { | |
1da177e4 | 306 | DPRINTK("dentry %p %.*s", |
1ce12bad | 307 | p, (int) p->d_name.len, p->d_name.name); |
1da177e4 | 308 | |
1ce12bad | 309 | if (d_mountpoint(p)) { |
e0a7aae9 IK |
310 | /* Can we umount this guy */ |
311 | if (autofs4_mount_busy(mnt, p)) | |
2fd6b7f5 | 312 | continue; |
1da177e4 | 313 | |
e0a7aae9 IK |
314 | /* Can we expire this guy */ |
315 | if (autofs4_can_expire(p, timeout, do_now)) | |
1ce12bad | 316 | return p; |
1da177e4 | 317 | } |
1da177e4 | 318 | } |
1da177e4 LT |
319 | return NULL; |
320 | } | |
321 | ||
3a15e2ab | 322 | /* Check if we can expire a direct mount (possibly a tree) */ |
8d7b48e0 IK |
323 | struct dentry *autofs4_expire_direct(struct super_block *sb, |
324 | struct vfsmount *mnt, | |
325 | struct autofs_sb_info *sbi, | |
326 | int how) | |
3a15e2ab IK |
327 | { |
328 | unsigned long timeout; | |
329 | struct dentry *root = dget(sb->s_root); | |
330 | int do_now = how & AUTOFS_EXP_IMMEDIATE; | |
b5b80177 | 331 | struct autofs_info *ino; |
3a15e2ab | 332 | |
c0ba7e51 | 333 | if (!root) |
3a15e2ab IK |
334 | return NULL; |
335 | ||
336 | now = jiffies; | |
337 | timeout = sbi->exp_timeout; | |
338 | ||
3a15e2ab | 339 | spin_lock(&sbi->fs_lock); |
b5b80177 IK |
340 | ino = autofs4_dentry_ino(root); |
341 | /* No point expiring a pending mount */ | |
f9398c23 IK |
342 | if (ino->flags & AUTOFS_INF_PENDING) |
343 | goto out; | |
3a15e2ab IK |
344 | if (!autofs4_direct_busy(mnt, root, timeout, do_now)) { |
345 | struct autofs_info *ino = autofs4_dentry_ino(root); | |
3a15e2ab | 346 | ino->flags |= AUTOFS_INF_EXPIRING; |
6e60a9ab | 347 | init_completion(&ino->expire_complete); |
3a15e2ab IK |
348 | spin_unlock(&sbi->fs_lock); |
349 | return root; | |
350 | } | |
f9398c23 | 351 | out: |
3a15e2ab IK |
352 | spin_unlock(&sbi->fs_lock); |
353 | dput(root); | |
354 | ||
355 | return NULL; | |
356 | } | |
357 | ||
1da177e4 LT |
358 | /* |
359 | * Find an eligible tree to time-out | |
360 | * A tree is eligible if :- | |
361 | * - it is unused by any user process | |
362 | * - it has been unused for exp_timeout time | |
363 | */ | |
8d7b48e0 IK |
364 | struct dentry *autofs4_expire_indirect(struct super_block *sb, |
365 | struct vfsmount *mnt, | |
366 | struct autofs_sb_info *sbi, | |
367 | int how) | |
1da177e4 LT |
368 | { |
369 | unsigned long timeout; | |
370 | struct dentry *root = sb->s_root; | |
2fd6b7f5 | 371 | struct dentry *dentry; |
1da177e4 | 372 | struct dentry *expired = NULL; |
1da177e4 LT |
373 | int do_now = how & AUTOFS_EXP_IMMEDIATE; |
374 | int exp_leaves = how & AUTOFS_EXP_LEAVES; | |
97e7449a IK |
375 | struct autofs_info *ino; |
376 | unsigned int ino_count; | |
1da177e4 | 377 | |
c0ba7e51 | 378 | if (!root) |
1da177e4 LT |
379 | return NULL; |
380 | ||
381 | now = jiffies; | |
382 | timeout = sbi->exp_timeout; | |
383 | ||
2fd6b7f5 | 384 | dentry = NULL; |
d4a85e35 | 385 | while ((dentry = get_next_positive_subdir(dentry, root))) { |
97e7449a IK |
386 | spin_lock(&sbi->fs_lock); |
387 | ino = autofs4_dentry_ino(dentry); | |
b5b80177 IK |
388 | /* No point expiring a pending mount */ |
389 | if (ino->flags & AUTOFS_INF_PENDING) | |
3c319985 | 390 | goto next; |
97e7449a | 391 | |
3a15e2ab IK |
392 | /* |
393 | * Case 1: (i) indirect mount or top level pseudo direct mount | |
394 | * (autofs-4.1). | |
395 | * (ii) indirect mount with offset mount, check the "/" | |
396 | * offset (autofs-5.0+). | |
397 | */ | |
1da177e4 LT |
398 | if (d_mountpoint(dentry)) { |
399 | DPRINTK("checking mountpoint %p %.*s", | |
400 | dentry, (int)dentry->d_name.len, dentry->d_name.name); | |
401 | ||
e0a7aae9 IK |
402 | /* Can we umount this guy */ |
403 | if (autofs4_mount_busy(mnt, dentry)) | |
1da177e4 LT |
404 | goto next; |
405 | ||
e0a7aae9 IK |
406 | /* Can we expire this guy */ |
407 | if (autofs4_can_expire(dentry, timeout, do_now)) { | |
1da177e4 | 408 | expired = dentry; |
afec570c | 409 | goto found; |
1da177e4 LT |
410 | } |
411 | goto next; | |
412 | } | |
413 | ||
1f5f2c30 | 414 | if (simple_empty(dentry)) |
1da177e4 LT |
415 | goto next; |
416 | ||
417 | /* Case 2: tree mount, expire iff entire tree is not busy */ | |
418 | if (!exp_leaves) { | |
97e7449a IK |
419 | /* Path walk currently on this dentry? */ |
420 | ino_count = atomic_read(&ino->count) + 1; | |
b7ab39f6 | 421 | if (dentry->d_count > ino_count) |
97e7449a | 422 | goto next; |
3a9720ce | 423 | |
97e7449a | 424 | if (!autofs4_tree_busy(mnt, dentry, timeout, do_now)) { |
3a9720ce | 425 | expired = dentry; |
afec570c | 426 | goto found; |
1da177e4 | 427 | } |
3a15e2ab IK |
428 | /* |
429 | * Case 3: pseudo direct mount, expire individual leaves | |
430 | * (autofs-4.1). | |
431 | */ | |
1da177e4 | 432 | } else { |
97e7449a IK |
433 | /* Path walk currently on this dentry? */ |
434 | ino_count = atomic_read(&ino->count) + 1; | |
b7ab39f6 | 435 | if (dentry->d_count > ino_count) |
97e7449a IK |
436 | goto next; |
437 | ||
1da177e4 LT |
438 | expired = autofs4_check_leaves(mnt, dentry, timeout, do_now); |
439 | if (expired) { | |
440 | dput(dentry); | |
afec570c | 441 | goto found; |
1da177e4 LT |
442 | } |
443 | } | |
444 | next: | |
97e7449a | 445 | spin_unlock(&sbi->fs_lock); |
1da177e4 | 446 | } |
1da177e4 | 447 | return NULL; |
afec570c IK |
448 | |
449 | found: | |
450 | DPRINTK("returning %p %.*s", | |
451 | expired, (int)expired->d_name.len, expired->d_name.name); | |
97e7449a IK |
452 | ino = autofs4_dentry_ino(expired); |
453 | ino->flags |= AUTOFS_INF_EXPIRING; | |
6e60a9ab | 454 | init_completion(&ino->expire_complete); |
97e7449a | 455 | spin_unlock(&sbi->fs_lock); |
e7854723 | 456 | spin_lock(&sbi->lookup_lock); |
2fd6b7f5 NP |
457 | spin_lock(&expired->d_parent->d_lock); |
458 | spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED); | |
afec570c | 459 | list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child); |
2fd6b7f5 NP |
460 | spin_unlock(&expired->d_lock); |
461 | spin_unlock(&expired->d_parent->d_lock); | |
e7854723 | 462 | spin_unlock(&sbi->lookup_lock); |
afec570c | 463 | return expired; |
1da177e4 LT |
464 | } |
465 | ||
06a35985 IK |
466 | int autofs4_expire_wait(struct dentry *dentry) |
467 | { | |
468 | struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); | |
469 | struct autofs_info *ino = autofs4_dentry_ino(dentry); | |
470 | int status; | |
471 | ||
472 | /* Block on any pending expire */ | |
473 | spin_lock(&sbi->fs_lock); | |
474 | if (ino->flags & AUTOFS_INF_EXPIRING) { | |
475 | spin_unlock(&sbi->fs_lock); | |
476 | ||
477 | DPRINTK("waiting for expire %p name=%.*s", | |
478 | dentry, dentry->d_name.len, dentry->d_name.name); | |
479 | ||
480 | status = autofs4_wait(sbi, dentry, NFY_NONE); | |
481 | wait_for_completion(&ino->expire_complete); | |
482 | ||
483 | DPRINTK("expire done status=%d", status); | |
484 | ||
4b1ae27a | 485 | if (d_unhashed(dentry)) |
06a35985 IK |
486 | return -EAGAIN; |
487 | ||
488 | return status; | |
489 | } | |
490 | spin_unlock(&sbi->fs_lock); | |
491 | ||
492 | return 0; | |
493 | } | |
494 | ||
1da177e4 LT |
495 | /* Perform an expiry operation */ |
496 | int autofs4_expire_run(struct super_block *sb, | |
497 | struct vfsmount *mnt, | |
498 | struct autofs_sb_info *sbi, | |
499 | struct autofs_packet_expire __user *pkt_p) | |
500 | { | |
501 | struct autofs_packet_expire pkt; | |
97e7449a | 502 | struct autofs_info *ino; |
1da177e4 | 503 | struct dentry *dentry; |
97e7449a | 504 | int ret = 0; |
1da177e4 LT |
505 | |
506 | memset(&pkt,0,sizeof pkt); | |
507 | ||
508 | pkt.hdr.proto_version = sbi->version; | |
509 | pkt.hdr.type = autofs_ptype_expire; | |
510 | ||
3a15e2ab | 511 | if ((dentry = autofs4_expire_indirect(sb, mnt, sbi, 0)) == NULL) |
1da177e4 LT |
512 | return -EAGAIN; |
513 | ||
514 | pkt.len = dentry->d_name.len; | |
515 | memcpy(pkt.name, dentry->d_name.name, pkt.len); | |
516 | pkt.name[pkt.len] = '\0'; | |
517 | dput(dentry); | |
518 | ||
519 | if ( copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)) ) | |
97e7449a | 520 | ret = -EFAULT; |
1da177e4 | 521 | |
97e7449a IK |
522 | spin_lock(&sbi->fs_lock); |
523 | ino = autofs4_dentry_ino(dentry); | |
524 | ino->flags &= ~AUTOFS_INF_EXPIRING; | |
6e60a9ab | 525 | complete_all(&ino->expire_complete); |
97e7449a IK |
526 | spin_unlock(&sbi->fs_lock); |
527 | ||
528 | return ret; | |
1da177e4 LT |
529 | } |
530 | ||
56fcef75 IK |
531 | int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, |
532 | struct autofs_sb_info *sbi, int when) | |
1da177e4 LT |
533 | { |
534 | struct dentry *dentry; | |
535 | int ret = -EAGAIN; | |
1da177e4 | 536 | |
a92daf6b | 537 | if (autofs_type_trigger(sbi->type)) |
56fcef75 | 538 | dentry = autofs4_expire_direct(sb, mnt, sbi, when); |
3a15e2ab | 539 | else |
56fcef75 | 540 | dentry = autofs4_expire_indirect(sb, mnt, sbi, when); |
3a15e2ab IK |
541 | |
542 | if (dentry) { | |
1f5f2c30 | 543 | struct autofs_info *ino = autofs4_dentry_ino(dentry); |
1da177e4 LT |
544 | |
545 | /* This is synchronous because it makes the daemon a | |
546 | little easier */ | |
1da177e4 | 547 | ret = autofs4_wait(sbi, dentry, NFY_EXPIRE); |
6e60a9ab | 548 | |
97e7449a | 549 | spin_lock(&sbi->fs_lock); |
1f5f2c30 | 550 | ino->flags &= ~AUTOFS_INF_EXPIRING; |
6e60a9ab | 551 | complete_all(&ino->expire_complete); |
97e7449a | 552 | spin_unlock(&sbi->fs_lock); |
1da177e4 LT |
553 | dput(dentry); |
554 | } | |
1f5f2c30 | 555 | |
1da177e4 LT |
556 | return ret; |
557 | } | |
558 | ||
56fcef75 IK |
559 | /* Call repeatedly until it returns -EAGAIN, meaning there's nothing |
560 | more to be done */ | |
561 | int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt, | |
562 | struct autofs_sb_info *sbi, int __user *arg) | |
563 | { | |
564 | int do_now = 0; | |
565 | ||
566 | if (arg && get_user(do_now, arg)) | |
567 | return -EFAULT; | |
568 | ||
569 | return autofs4_do_expire_multi(sb, mnt, sbi, do_now); | |
570 | } | |
571 |