cookie.c (f1615bbe9be4def59c3b3eaddb60722efeed16c2) cookie.c (743162013d40ca612b4cb53d3a200dff2d9ab26e)
1/* netfs cookie management
2 *
3 * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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155 */
156void __fscache_enable_cookie(struct fscache_cookie *cookie,
157 bool (*can_enable)(void *data),
158 void *data)
159{
160 _enter("%p", cookie);
161
162 wait_on_bit_lock(&cookie->flags, FSCACHE_COOKIE_ENABLEMENT_LOCK,
1/* netfs cookie management
2 *
3 * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version

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155 */
156void __fscache_enable_cookie(struct fscache_cookie *cookie,
157 bool (*can_enable)(void *data),
158 void *data)
159{
160 _enter("%p", cookie);
161
162 wait_on_bit_lock(&cookie->flags, FSCACHE_COOKIE_ENABLEMENT_LOCK,
163 fscache_wait_bit, TASK_UNINTERRUPTIBLE);
163 TASK_UNINTERRUPTIBLE);
164
165 if (test_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags))
166 goto out_unlock;
167
168 if (can_enable && !can_enable(data)) {
169 /* The netfs decided it didn't want to enable after all */
170 } else if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX) {
171 /* Wait for outstanding disablement to complete */

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250 fscache_raise_event(object, FSCACHE_OBJECT_EV_NEW_CHILD);
251
252 spin_unlock(&cookie->lock);
253
254 /* we may be required to wait for lookup to complete at this point */
255 if (!fscache_defer_lookup) {
256 _debug("non-deferred lookup %p", &cookie->flags);
257 wait_on_bit(&cookie->flags, FSCACHE_COOKIE_LOOKING_UP,
164
165 if (test_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags))
166 goto out_unlock;
167
168 if (can_enable && !can_enable(data)) {
169 /* The netfs decided it didn't want to enable after all */
170 } else if (cookie->def->type != FSCACHE_COOKIE_TYPE_INDEX) {
171 /* Wait for outstanding disablement to complete */

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250 fscache_raise_event(object, FSCACHE_OBJECT_EV_NEW_CHILD);
251
252 spin_unlock(&cookie->lock);
253
254 /* we may be required to wait for lookup to complete at this point */
255 if (!fscache_defer_lookup) {
256 _debug("non-deferred lookup %p", &cookie->flags);
257 wait_on_bit(&cookie->flags, FSCACHE_COOKIE_LOOKING_UP,
258 fscache_wait_bit, TASK_UNINTERRUPTIBLE);
258 TASK_UNINTERRUPTIBLE);
259 _debug("complete");
260 if (test_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags))
261 goto unavailable;
262 }
263
264 up_read(&fscache_addremove_sem);
265 _leave(" = 0 [deferred]");
266 return 0;

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458/*
459 * Wait for object invalidation to complete.
460 */
461void __fscache_wait_on_invalidate(struct fscache_cookie *cookie)
462{
463 _enter("%p", cookie);
464
465 wait_on_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING,
259 _debug("complete");
260 if (test_bit(FSCACHE_COOKIE_UNAVAILABLE, &cookie->flags))
261 goto unavailable;
262 }
263
264 up_read(&fscache_addremove_sem);
265 _leave(" = 0 [deferred]");
266 return 0;

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458/*
459 * Wait for object invalidation to complete.
460 */
461void __fscache_wait_on_invalidate(struct fscache_cookie *cookie)
462{
463 _enter("%p", cookie);
464
465 wait_on_bit(&cookie->flags, FSCACHE_COOKIE_INVALIDATING,
466 fscache_wait_bit_interruptible,
467 TASK_UNINTERRUPTIBLE);
468
469 _leave("");
470}
471EXPORT_SYMBOL(__fscache_wait_on_invalidate);
472
473/*
474 * update the index entries backing a cookie

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520
521 if (atomic_read(&cookie->n_children) != 0) {
522 pr_err("Cookie '%s' still has children\n",
523 cookie->def->name);
524 BUG();
525 }
526
527 wait_on_bit_lock(&cookie->flags, FSCACHE_COOKIE_ENABLEMENT_LOCK,
466 TASK_UNINTERRUPTIBLE);
467
468 _leave("");
469}
470EXPORT_SYMBOL(__fscache_wait_on_invalidate);
471
472/*
473 * update the index entries backing a cookie

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519
520 if (atomic_read(&cookie->n_children) != 0) {
521 pr_err("Cookie '%s' still has children\n",
522 cookie->def->name);
523 BUG();
524 }
525
526 wait_on_bit_lock(&cookie->flags, FSCACHE_COOKIE_ENABLEMENT_LOCK,
528 fscache_wait_bit, TASK_UNINTERRUPTIBLE);
527 TASK_UNINTERRUPTIBLE);
529 if (!test_and_clear_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags))
530 goto out_unlock_enable;
531
532 /* If the cookie is being invalidated, wait for that to complete first
533 * so that we can reuse the flag.
534 */
535 __fscache_wait_on_invalidate(cookie);
536

--- 187 unchanged lines hidden --- 		528 if (!test_and_clear_bit(FSCACHE_COOKIE_ENABLED, &cookie->flags))
529 goto out_unlock_enable;
530
531 /* If the cookie is being invalidated, wait for that to complete first
532 * so that we can reuse the flag.
533 */
534 __fscache_wait_on_invalidate(cookie);
535

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