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 | ||
29 | /* No point expiring a pending mount */ | |
aa952eb2 | 30 | if (ino->flags & AUTOFS_INF_PENDING) |
1da177e4 LT |
31 | return 0; |
32 | ||
33 | if (!do_now) { | |
34 | /* Too young to die */ | |
c0ba7e51 | 35 | if (!timeout || time_after(ino->last_used + timeout, now)) |
1da177e4 LT |
36 | return 0; |
37 | ||
38 | /* update last_used here :- | |
39 | - obviously makes sense if it is in use now | |
40 | - less obviously, prevents rapid-fire expire | |
41 | attempts if expire fails the first time */ | |
42 | ino->last_used = now; | |
43 | } | |
1da177e4 LT |
44 | return 1; |
45 | } | |
46 | ||
1f5f2c30 IK |
47 | /* Check a mount point for busyness */ |
48 | static int autofs4_mount_busy(struct vfsmount *mnt, struct dentry *dentry) | |
1da177e4 | 49 | { |
e0a7aae9 | 50 | struct dentry *top = dentry; |
9393bd07 | 51 | struct path path = {.mnt = mnt, .dentry = dentry}; |
1f5f2c30 | 52 | int status = 1; |
1da177e4 LT |
53 | |
54 | DPRINTK("dentry %p %.*s", | |
55 | dentry, (int)dentry->d_name.len, dentry->d_name.name); | |
56 | ||
9393bd07 | 57 | path_get(&path); |
1da177e4 | 58 | |
9393bd07 | 59 | if (!follow_down(&path)) |
1da177e4 LT |
60 | goto done; |
61 | ||
9393bd07 AV |
62 | if (is_autofs4_dentry(path.dentry)) { |
63 | struct autofs_sb_info *sbi = autofs4_sbi(path.dentry->d_sb); | |
bc9c4068 IK |
64 | |
65 | /* This is an autofs submount, we can't expire it */ | |
a92daf6b | 66 | if (autofs_type_indirect(sbi->type)) |
bc9c4068 IK |
67 | goto done; |
68 | ||
69 | /* | |
70 | * Otherwise it's an offset mount and we need to check | |
71 | * if we can umount its mount, if there is one. | |
72 | */ | |
9393bd07 | 73 | if (!d_mountpoint(path.dentry)) { |
a8985f3a | 74 | status = 0; |
bc9c4068 | 75 | goto done; |
a8985f3a | 76 | } |
bc9c4068 | 77 | } |
1da177e4 | 78 | |
e0a7aae9 | 79 | /* Update the expiry counter if fs is busy */ |
37d0892c | 80 | if (!may_umount_tree(path.mnt)) { |
e0a7aae9 IK |
81 | struct autofs_info *ino = autofs4_dentry_ino(top); |
82 | ino->last_used = jiffies; | |
83 | goto done; | |
84 | } | |
85 | ||
86 | status = 0; | |
1da177e4 LT |
87 | done: |
88 | DPRINTK("returning = %d", status); | |
9393bd07 | 89 | path_put(&path); |
1da177e4 LT |
90 | return status; |
91 | } | |
92 | ||
1ce12bad | 93 | /* |
2fd6b7f5 | 94 | * Calculate and dget next entry in top down tree traversal. |
1ce12bad | 95 | */ |
2fd6b7f5 NP |
96 | static struct dentry *get_next_positive_dentry(struct dentry *prev, |
97 | struct dentry *root) | |
1ce12bad | 98 | { |
2fd6b7f5 NP |
99 | struct list_head *next; |
100 | struct dentry *p, *ret; | |
101 | ||
102 | if (prev == NULL) | |
103 | return dget(prev); | |
1ce12bad | 104 | |
b5c84bf6 | 105 | spin_lock(&autofs4_lock); |
2fd6b7f5 NP |
106 | relock: |
107 | p = prev; | |
108 | spin_lock(&p->d_lock); | |
109 | again: | |
110 | next = p->d_subdirs.next; | |
1ce12bad IK |
111 | if (next == &p->d_subdirs) { |
112 | while (1) { | |
2fd6b7f5 NP |
113 | struct dentry *parent; |
114 | ||
115 | if (p == root) { | |
116 | spin_unlock(&p->d_lock); | |
b5c84bf6 | 117 | spin_unlock(&autofs4_lock); |
2fd6b7f5 | 118 | dput(prev); |
1ce12bad | 119 | return NULL; |
2fd6b7f5 NP |
120 | } |
121 | ||
122 | parent = p->d_parent; | |
123 | if (!spin_trylock(&parent->d_lock)) { | |
124 | spin_unlock(&p->d_lock); | |
125 | cpu_relax(); | |
126 | goto relock; | |
127 | } | |
128 | spin_unlock(&p->d_lock); | |
1ce12bad | 129 | next = p->d_u.d_child.next; |
2fd6b7f5 NP |
130 | p = parent; |
131 | if (next != &parent->d_subdirs) | |
1ce12bad | 132 | break; |
1ce12bad IK |
133 | } |
134 | } | |
2fd6b7f5 NP |
135 | ret = list_entry(next, struct dentry, d_u.d_child); |
136 | ||
137 | spin_lock_nested(&ret->d_lock, DENTRY_D_LOCK_NESTED); | |
138 | /* Negative dentry - try next */ | |
139 | if (!simple_positive(ret)) { | |
140 | spin_unlock(&ret->d_lock); | |
141 | p = ret; | |
142 | goto again; | |
143 | } | |
144 | dget_dlock(ret); | |
145 | spin_unlock(&ret->d_lock); | |
146 | spin_unlock(&p->d_lock); | |
b5c84bf6 | 147 | spin_unlock(&autofs4_lock); |
2fd6b7f5 NP |
148 | |
149 | dput(prev); | |
150 | ||
151 | return ret; | |
1ce12bad IK |
152 | } |
153 | ||
3a15e2ab IK |
154 | /* |
155 | * Check a direct mount point for busyness. | |
156 | * Direct mounts have similar expiry semantics to tree mounts. | |
157 | * The tree is not busy iff no mountpoints are busy and there are no | |
158 | * autofs submounts. | |
159 | */ | |
160 | static int autofs4_direct_busy(struct vfsmount *mnt, | |
161 | struct dentry *top, | |
162 | unsigned long timeout, | |
163 | int do_now) | |
164 | { | |
165 | DPRINTK("top %p %.*s", | |
166 | top, (int) top->d_name.len, top->d_name.name); | |
167 | ||
3a15e2ab IK |
168 | /* If it's busy update the expiry counters */ |
169 | if (!may_umount_tree(mnt)) { | |
170 | struct autofs_info *ino = autofs4_dentry_ino(top); | |
171 | if (ino) | |
172 | ino->last_used = jiffies; | |
173 | return 1; | |
174 | } | |
175 | ||
176 | /* Timeout of a direct mount is determined by its top dentry */ | |
177 | if (!autofs4_can_expire(top, timeout, do_now)) | |
178 | return 1; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
1da177e4 LT |
183 | /* Check a directory tree of mount points for busyness |
184 | * The tree is not busy iff no mountpoints are busy | |
1da177e4 | 185 | */ |
1f5f2c30 IK |
186 | static int autofs4_tree_busy(struct vfsmount *mnt, |
187 | struct dentry *top, | |
188 | unsigned long timeout, | |
189 | int do_now) | |
1da177e4 | 190 | { |
e0a7aae9 | 191 | struct autofs_info *top_ino = autofs4_dentry_ino(top); |
1ce12bad | 192 | struct dentry *p; |
1da177e4 | 193 | |
1f5f2c30 | 194 | DPRINTK("top %p %.*s", |
1da177e4 LT |
195 | top, (int)top->d_name.len, top->d_name.name); |
196 | ||
197 | /* Negative dentry - give up */ | |
198 | if (!simple_positive(top)) | |
1f5f2c30 | 199 | return 1; |
1da177e4 | 200 | |
2fd6b7f5 NP |
201 | p = NULL; |
202 | while ((p = get_next_positive_dentry(p, top))) { | |
1da177e4 | 203 | DPRINTK("dentry %p %.*s", |
1ce12bad | 204 | p, (int) p->d_name.len, p->d_name.name); |
1da177e4 | 205 | |
1aff3c8b IK |
206 | /* |
207 | * Is someone visiting anywhere in the subtree ? | |
208 | * If there's no mount we need to check the usage | |
209 | * count for the autofs dentry. | |
e0a7aae9 | 210 | * If the fs is busy update the expiry counter. |
1aff3c8b | 211 | */ |
1ce12bad | 212 | if (d_mountpoint(p)) { |
1ce12bad | 213 | if (autofs4_mount_busy(mnt, p)) { |
e0a7aae9 | 214 | top_ino->last_used = jiffies; |
1ce12bad | 215 | dput(p); |
1f5f2c30 | 216 | return 1; |
1da177e4 | 217 | } |
1aff3c8b | 218 | } else { |
e0a7aae9 | 219 | struct autofs_info *ino = autofs4_dentry_ino(p); |
1aff3c8b IK |
220 | unsigned int ino_count = atomic_read(&ino->count); |
221 | ||
f9022f66 IK |
222 | /* |
223 | * Clean stale dentries below that have not been | |
224 | * invalidated after a mount fail during lookup | |
225 | */ | |
226 | d_invalidate(p); | |
227 | ||
1aff3c8b IK |
228 | /* allow for dget above and top is already dgot */ |
229 | if (p == top) | |
230 | ino_count += 2; | |
231 | else | |
232 | ino_count++; | |
233 | ||
b7ab39f6 | 234 | if (p->d_count > ino_count) { |
e0a7aae9 | 235 | top_ino->last_used = jiffies; |
1aff3c8b IK |
236 | dput(p); |
237 | return 1; | |
238 | } | |
1da177e4 | 239 | } |
1da177e4 | 240 | } |
1aff3c8b IK |
241 | |
242 | /* Timeout of a tree mount is ultimately determined by its top dentry */ | |
243 | if (!autofs4_can_expire(top, timeout, do_now)) | |
244 | return 1; | |
245 | ||
1f5f2c30 | 246 | return 0; |
1da177e4 LT |
247 | } |
248 | ||
249 | static struct dentry *autofs4_check_leaves(struct vfsmount *mnt, | |
250 | struct dentry *parent, | |
251 | unsigned long timeout, | |
252 | int do_now) | |
253 | { | |
1ce12bad | 254 | struct dentry *p; |
1da177e4 LT |
255 | |
256 | DPRINTK("parent %p %.*s", | |
257 | parent, (int)parent->d_name.len, parent->d_name.name); | |
258 | ||
2fd6b7f5 NP |
259 | p = NULL; |
260 | while ((p = get_next_positive_dentry(p, parent))) { | |
1da177e4 | 261 | DPRINTK("dentry %p %.*s", |
1ce12bad | 262 | p, (int) p->d_name.len, p->d_name.name); |
1da177e4 | 263 | |
1ce12bad | 264 | if (d_mountpoint(p)) { |
e0a7aae9 IK |
265 | /* Can we umount this guy */ |
266 | if (autofs4_mount_busy(mnt, p)) | |
2fd6b7f5 | 267 | continue; |
1da177e4 | 268 | |
e0a7aae9 IK |
269 | /* Can we expire this guy */ |
270 | if (autofs4_can_expire(p, timeout, do_now)) | |
1ce12bad | 271 | return p; |
1da177e4 | 272 | } |
1da177e4 | 273 | } |
1da177e4 LT |
274 | return NULL; |
275 | } | |
276 | ||
3a15e2ab | 277 | /* Check if we can expire a direct mount (possibly a tree) */ |
8d7b48e0 IK |
278 | struct dentry *autofs4_expire_direct(struct super_block *sb, |
279 | struct vfsmount *mnt, | |
280 | struct autofs_sb_info *sbi, | |
281 | int how) | |
3a15e2ab IK |
282 | { |
283 | unsigned long timeout; | |
284 | struct dentry *root = dget(sb->s_root); | |
285 | int do_now = how & AUTOFS_EXP_IMMEDIATE; | |
286 | ||
c0ba7e51 | 287 | if (!root) |
3a15e2ab IK |
288 | return NULL; |
289 | ||
290 | now = jiffies; | |
291 | timeout = sbi->exp_timeout; | |
292 | ||
3a15e2ab IK |
293 | spin_lock(&sbi->fs_lock); |
294 | if (!autofs4_direct_busy(mnt, root, timeout, do_now)) { | |
295 | struct autofs_info *ino = autofs4_dentry_ino(root); | |
6e60a9ab IK |
296 | if (d_mountpoint(root)) { |
297 | ino->flags |= AUTOFS_INF_MOUNTPOINT; | |
5f57cbcc NP |
298 | spin_lock(&root->d_lock); |
299 | root->d_flags &= ~DCACHE_MOUNTED; | |
300 | spin_unlock(&root->d_lock); | |
6e60a9ab | 301 | } |
3a15e2ab | 302 | ino->flags |= AUTOFS_INF_EXPIRING; |
6e60a9ab | 303 | init_completion(&ino->expire_complete); |
3a15e2ab IK |
304 | spin_unlock(&sbi->fs_lock); |
305 | return root; | |
306 | } | |
307 | spin_unlock(&sbi->fs_lock); | |
308 | dput(root); | |
309 | ||
310 | return NULL; | |
311 | } | |
312 | ||
1da177e4 LT |
313 | /* |
314 | * Find an eligible tree to time-out | |
315 | * A tree is eligible if :- | |
316 | * - it is unused by any user process | |
317 | * - it has been unused for exp_timeout time | |
318 | */ | |
8d7b48e0 IK |
319 | struct dentry *autofs4_expire_indirect(struct super_block *sb, |
320 | struct vfsmount *mnt, | |
321 | struct autofs_sb_info *sbi, | |
322 | int how) | |
1da177e4 LT |
323 | { |
324 | unsigned long timeout; | |
325 | struct dentry *root = sb->s_root; | |
2fd6b7f5 | 326 | struct dentry *dentry; |
1da177e4 | 327 | struct dentry *expired = NULL; |
1da177e4 LT |
328 | int do_now = how & AUTOFS_EXP_IMMEDIATE; |
329 | int exp_leaves = how & AUTOFS_EXP_LEAVES; | |
97e7449a IK |
330 | struct autofs_info *ino; |
331 | unsigned int ino_count; | |
1da177e4 | 332 | |
c0ba7e51 | 333 | if (!root) |
1da177e4 LT |
334 | return NULL; |
335 | ||
336 | now = jiffies; | |
337 | timeout = sbi->exp_timeout; | |
338 | ||
2fd6b7f5 NP |
339 | dentry = NULL; |
340 | while ((dentry = get_next_positive_dentry(dentry, root))) { | |
97e7449a IK |
341 | spin_lock(&sbi->fs_lock); |
342 | ino = autofs4_dentry_ino(dentry); | |
343 | ||
3a15e2ab IK |
344 | /* |
345 | * Case 1: (i) indirect mount or top level pseudo direct mount | |
346 | * (autofs-4.1). | |
347 | * (ii) indirect mount with offset mount, check the "/" | |
348 | * offset (autofs-5.0+). | |
349 | */ | |
1da177e4 LT |
350 | if (d_mountpoint(dentry)) { |
351 | DPRINTK("checking mountpoint %p %.*s", | |
352 | dentry, (int)dentry->d_name.len, dentry->d_name.name); | |
353 | ||
97e7449a IK |
354 | /* Path walk currently on this dentry? */ |
355 | ino_count = atomic_read(&ino->count) + 2; | |
b7ab39f6 | 356 | if (dentry->d_count > ino_count) |
97e7449a IK |
357 | goto next; |
358 | ||
e0a7aae9 IK |
359 | /* Can we umount this guy */ |
360 | if (autofs4_mount_busy(mnt, dentry)) | |
1da177e4 LT |
361 | goto next; |
362 | ||
e0a7aae9 IK |
363 | /* Can we expire this guy */ |
364 | if (autofs4_can_expire(dentry, timeout, do_now)) { | |
1da177e4 | 365 | expired = dentry; |
afec570c | 366 | goto found; |
1da177e4 LT |
367 | } |
368 | goto next; | |
369 | } | |
370 | ||
1f5f2c30 | 371 | if (simple_empty(dentry)) |
1da177e4 LT |
372 | goto next; |
373 | ||
374 | /* Case 2: tree mount, expire iff entire tree is not busy */ | |
375 | if (!exp_leaves) { | |
97e7449a IK |
376 | /* Path walk currently on this dentry? */ |
377 | ino_count = atomic_read(&ino->count) + 1; | |
b7ab39f6 | 378 | if (dentry->d_count > ino_count) |
97e7449a | 379 | goto next; |
3a9720ce | 380 | |
97e7449a | 381 | if (!autofs4_tree_busy(mnt, dentry, timeout, do_now)) { |
3a9720ce | 382 | expired = dentry; |
afec570c | 383 | goto found; |
1da177e4 | 384 | } |
3a15e2ab IK |
385 | /* |
386 | * Case 3: pseudo direct mount, expire individual leaves | |
387 | * (autofs-4.1). | |
388 | */ | |
1da177e4 | 389 | } else { |
97e7449a IK |
390 | /* Path walk currently on this dentry? */ |
391 | ino_count = atomic_read(&ino->count) + 1; | |
b7ab39f6 | 392 | if (dentry->d_count > ino_count) |
97e7449a IK |
393 | goto next; |
394 | ||
1da177e4 LT |
395 | expired = autofs4_check_leaves(mnt, dentry, timeout, do_now); |
396 | if (expired) { | |
397 | dput(dentry); | |
afec570c | 398 | goto found; |
1da177e4 LT |
399 | } |
400 | } | |
401 | next: | |
97e7449a | 402 | spin_unlock(&sbi->fs_lock); |
1da177e4 | 403 | } |
1da177e4 | 404 | return NULL; |
afec570c IK |
405 | |
406 | found: | |
407 | DPRINTK("returning %p %.*s", | |
408 | expired, (int)expired->d_name.len, expired->d_name.name); | |
97e7449a IK |
409 | ino = autofs4_dentry_ino(expired); |
410 | ino->flags |= AUTOFS_INF_EXPIRING; | |
6e60a9ab | 411 | init_completion(&ino->expire_complete); |
97e7449a | 412 | spin_unlock(&sbi->fs_lock); |
b5c84bf6 | 413 | spin_lock(&autofs4_lock); |
2fd6b7f5 NP |
414 | spin_lock(&expired->d_parent->d_lock); |
415 | spin_lock_nested(&expired->d_lock, DENTRY_D_LOCK_NESTED); | |
afec570c | 416 | list_move(&expired->d_parent->d_subdirs, &expired->d_u.d_child); |
2fd6b7f5 NP |
417 | spin_unlock(&expired->d_lock); |
418 | spin_unlock(&expired->d_parent->d_lock); | |
b5c84bf6 | 419 | spin_unlock(&autofs4_lock); |
afec570c | 420 | return expired; |
1da177e4 LT |
421 | } |
422 | ||
06a35985 IK |
423 | int autofs4_expire_wait(struct dentry *dentry) |
424 | { | |
425 | struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); | |
426 | struct autofs_info *ino = autofs4_dentry_ino(dentry); | |
427 | int status; | |
428 | ||
429 | /* Block on any pending expire */ | |
430 | spin_lock(&sbi->fs_lock); | |
431 | if (ino->flags & AUTOFS_INF_EXPIRING) { | |
432 | spin_unlock(&sbi->fs_lock); | |
433 | ||
434 | DPRINTK("waiting for expire %p name=%.*s", | |
435 | dentry, dentry->d_name.len, dentry->d_name.name); | |
436 | ||
437 | status = autofs4_wait(sbi, dentry, NFY_NONE); | |
438 | wait_for_completion(&ino->expire_complete); | |
439 | ||
440 | DPRINTK("expire done status=%d", status); | |
441 | ||
4b1ae27a | 442 | if (d_unhashed(dentry)) |
06a35985 IK |
443 | return -EAGAIN; |
444 | ||
445 | return status; | |
446 | } | |
447 | spin_unlock(&sbi->fs_lock); | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
1da177e4 LT |
452 | /* Perform an expiry operation */ |
453 | int autofs4_expire_run(struct super_block *sb, | |
454 | struct vfsmount *mnt, | |
455 | struct autofs_sb_info *sbi, | |
456 | struct autofs_packet_expire __user *pkt_p) | |
457 | { | |
458 | struct autofs_packet_expire pkt; | |
97e7449a | 459 | struct autofs_info *ino; |
1da177e4 | 460 | struct dentry *dentry; |
97e7449a | 461 | int ret = 0; |
1da177e4 LT |
462 | |
463 | memset(&pkt,0,sizeof pkt); | |
464 | ||
465 | pkt.hdr.proto_version = sbi->version; | |
466 | pkt.hdr.type = autofs_ptype_expire; | |
467 | ||
3a15e2ab | 468 | if ((dentry = autofs4_expire_indirect(sb, mnt, sbi, 0)) == NULL) |
1da177e4 LT |
469 | return -EAGAIN; |
470 | ||
471 | pkt.len = dentry->d_name.len; | |
472 | memcpy(pkt.name, dentry->d_name.name, pkt.len); | |
473 | pkt.name[pkt.len] = '\0'; | |
474 | dput(dentry); | |
475 | ||
476 | if ( copy_to_user(pkt_p, &pkt, sizeof(struct autofs_packet_expire)) ) | |
97e7449a | 477 | ret = -EFAULT; |
1da177e4 | 478 | |
97e7449a IK |
479 | spin_lock(&sbi->fs_lock); |
480 | ino = autofs4_dentry_ino(dentry); | |
481 | ino->flags &= ~AUTOFS_INF_EXPIRING; | |
6e60a9ab | 482 | complete_all(&ino->expire_complete); |
97e7449a IK |
483 | spin_unlock(&sbi->fs_lock); |
484 | ||
485 | return ret; | |
1da177e4 LT |
486 | } |
487 | ||
56fcef75 IK |
488 | int autofs4_do_expire_multi(struct super_block *sb, struct vfsmount *mnt, |
489 | struct autofs_sb_info *sbi, int when) | |
1da177e4 LT |
490 | { |
491 | struct dentry *dentry; | |
492 | int ret = -EAGAIN; | |
1da177e4 | 493 | |
a92daf6b | 494 | if (autofs_type_trigger(sbi->type)) |
56fcef75 | 495 | dentry = autofs4_expire_direct(sb, mnt, sbi, when); |
3a15e2ab | 496 | else |
56fcef75 | 497 | dentry = autofs4_expire_indirect(sb, mnt, sbi, when); |
3a15e2ab IK |
498 | |
499 | if (dentry) { | |
1f5f2c30 | 500 | struct autofs_info *ino = autofs4_dentry_ino(dentry); |
1da177e4 LT |
501 | |
502 | /* This is synchronous because it makes the daemon a | |
503 | little easier */ | |
1da177e4 | 504 | ret = autofs4_wait(sbi, dentry, NFY_EXPIRE); |
6e60a9ab | 505 | |
97e7449a | 506 | spin_lock(&sbi->fs_lock); |
6e60a9ab | 507 | if (ino->flags & AUTOFS_INF_MOUNTPOINT) { |
5f57cbcc NP |
508 | spin_lock(&sb->s_root->d_lock); |
509 | /* | |
510 | * If we haven't been expired away, then reset | |
511 | * mounted status. | |
512 | */ | |
513 | if (mnt->mnt_parent != mnt) | |
514 | sb->s_root->d_flags |= DCACHE_MOUNTED; | |
515 | spin_unlock(&sb->s_root->d_lock); | |
6e60a9ab IK |
516 | ino->flags &= ~AUTOFS_INF_MOUNTPOINT; |
517 | } | |
1f5f2c30 | 518 | ino->flags &= ~AUTOFS_INF_EXPIRING; |
6e60a9ab | 519 | complete_all(&ino->expire_complete); |
97e7449a | 520 | spin_unlock(&sbi->fs_lock); |
1da177e4 LT |
521 | dput(dentry); |
522 | } | |
1f5f2c30 | 523 | |
1da177e4 LT |
524 | return ret; |
525 | } | |
526 | ||
56fcef75 IK |
527 | /* Call repeatedly until it returns -EAGAIN, meaning there's nothing |
528 | more to be done */ | |
529 | int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt, | |
530 | struct autofs_sb_info *sbi, int __user *arg) | |
531 | { | |
532 | int do_now = 0; | |
533 | ||
534 | if (arg && get_user(do_now, arg)) | |
535 | return -EFAULT; | |
536 | ||
537 | return autofs4_do_expire_multi(sb, mnt, sbi, do_now); | |
538 | } | |
539 |