59 	int (*handler)(struct cachefiles_cache *cache, char *args);
85 	struct cachefiles_cache *cache;  in cachefiles_daemon_open()  local
98 	cache = kzalloc(sizeof(struct cachefiles_cache), GFP_KERNEL);  in cachefiles_daemon_open()
99 	if (!cache) {  in cachefiles_daemon_open()
104 	mutex_init(&cache->daemon_mutex);  in cachefiles_daemon_open()
105 	cache->active_nodes = RB_ROOT;  in cachefiles_daemon_open()
106 	rwlock_init(&cache->active_lock);  in cachefiles_daemon_open()
107 	init_waitqueue_head(&cache->daemon_pollwq);  in cachefiles_daemon_open()
114 	cache->frun_percent = 7;  in cachefiles_daemon_open()
115 	cache->fcull_percent = 5;  in cachefiles_daemon_open()
116 	cache->fstop_percent = 1;  in cachefiles_daemon_open()
117 	cache->brun_percent = 7;  in cachefiles_daemon_open()
118 	cache->bcull_percent = 5;  in cachefiles_daemon_open()
119 	cache->bstop_percent = 1;  in cachefiles_daemon_open()
121 	file->private_data = cache;  in cachefiles_daemon_open()
122 	cache->cachefilesd = file;  in cachefiles_daemon_open()
131 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_release()  local
135 	ASSERT(cache);  in cachefiles_daemon_release()
137 	set_bit(CACHEFILES_DEAD, &cache->flags);  in cachefiles_daemon_release()
139 	cachefiles_daemon_unbind(cache);  in cachefiles_daemon_release()
141 	ASSERT(!cache->active_nodes.rb_node);  in cachefiles_daemon_release()
144 	cache->cachefilesd = NULL;  in cachefiles_daemon_release()
148 	kfree(cache);  in cachefiles_daemon_release()
160 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_read()  local
168 	if (!test_bit(CACHEFILES_READY, &cache->flags))  in cachefiles_daemon_read()
172 	cachefiles_has_space(cache, 0, 0);  in cachefiles_daemon_read()
175 	f_released = atomic_xchg(&cache->f_released, 0);  in cachefiles_daemon_read()
176 	b_released = atomic_long_xchg(&cache->b_released, 0);  in cachefiles_daemon_read()
177 	clear_bit(CACHEFILES_STATE_CHANGED, &cache->flags);  in cachefiles_daemon_read()
189 		     test_bit(CACHEFILES_CULLING, &cache->flags) ? '1' : '0',  in cachefiles_daemon_read()
190 		     (unsigned long long) cache->frun,  in cachefiles_daemon_read()
191 		     (unsigned long long) cache->fcull,  in cachefiles_daemon_read()
192 		     (unsigned long long) cache->fstop,  in cachefiles_daemon_read()
193 		     (unsigned long long) cache->brun,  in cachefiles_daemon_read()
194 		     (unsigned long long) cache->bcull,  in cachefiles_daemon_read()
195 		     (unsigned long long) cache->bstop,  in cachefiles_daemon_read()
217 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_write()  local
223 	ASSERT(cache);  in cachefiles_daemon_write()
225 	if (test_bit(CACHEFILES_DEAD, &cache->flags))  in cachefiles_daemon_write()
273 	mutex_lock(&cache->daemon_mutex);  in cachefiles_daemon_write()
276 	if (!test_bit(CACHEFILES_DEAD, &cache->flags))  in cachefiles_daemon_write()
277 		ret = cmd->handler(cache, args);  in cachefiles_daemon_write()
279 	mutex_unlock(&cache->daemon_mutex);  in cachefiles_daemon_write()
293 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_poll()  local
296 	poll_wait(file, &cache->daemon_pollwq, poll);  in cachefiles_daemon_poll()
299 	if (test_bit(CACHEFILES_STATE_CHANGED, &cache->flags))  in cachefiles_daemon_poll()
302 	if (test_bit(CACHEFILES_CULLING, &cache->flags))  in cachefiles_daemon_poll()
312 static int cachefiles_daemon_range_error(struct cachefiles_cache *cache,  in cachefiles_daemon_range_error()  argument
324 static int cachefiles_daemon_frun(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_frun()  argument
337 	if (frun <= cache->fcull_percent || frun >= 100)  in cachefiles_daemon_frun()
338 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_frun()
340 	cache->frun_percent = frun;  in cachefiles_daemon_frun()
348 static int cachefiles_daemon_fcull(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_fcull()  argument
361 	if (fcull <= cache->fstop_percent || fcull >= cache->frun_percent)  in cachefiles_daemon_fcull()
362 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_fcull()
364 	cache->fcull_percent = fcull;  in cachefiles_daemon_fcull()
372 static int cachefiles_daemon_fstop(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_fstop()  argument
385 	if (fstop < 0 || fstop >= cache->fcull_percent)  in cachefiles_daemon_fstop()
386 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_fstop()
388 	cache->fstop_percent = fstop;  in cachefiles_daemon_fstop()
396 static int cachefiles_daemon_brun(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_brun()  argument
409 	if (brun <= cache->bcull_percent || brun >= 100)  in cachefiles_daemon_brun()
410 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_brun()
412 	cache->brun_percent = brun;  in cachefiles_daemon_brun()
420 static int cachefiles_daemon_bcull(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_bcull()  argument
433 	if (bcull <= cache->bstop_percent || bcull >= cache->brun_percent)  in cachefiles_daemon_bcull()
434 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_bcull()
436 	cache->bcull_percent = bcull;  in cachefiles_daemon_bcull()
444 static int cachefiles_daemon_bstop(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_bstop()  argument
457 	if (bstop < 0 || bstop >= cache->bcull_percent)  in cachefiles_daemon_bstop()
458 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_bstop()
460 	cache->bstop_percent = bstop;  in cachefiles_daemon_bstop()
468 static int cachefiles_daemon_dir(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_dir()  argument
479 	if (cache->rootdirname) {  in cachefiles_daemon_dir()
488 	cache->rootdirname = dir;  in cachefiles_daemon_dir()
496 static int cachefiles_daemon_secctx(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_secctx()  argument
507 	if (cache->secctx) {  in cachefiles_daemon_secctx()
516 	cache->secctx = secctx;  in cachefiles_daemon_secctx()
524 static int cachefiles_daemon_tag(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_tag()  argument
535 	if (cache->tag)  in cachefiles_daemon_tag()
542 	cache->tag = tag;  in cachefiles_daemon_tag()
550 static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_cull()  argument
561 	if (!test_bit(CACHEFILES_READY, &cache->flags)) {  in cachefiles_daemon_cull()
566 	if (test_bit(CACHEFILES_DEAD, &cache->flags)) {  in cachefiles_daemon_cull()
577 	cachefiles_begin_secure(cache, &saved_cred);  in cachefiles_daemon_cull()
578 	ret = cachefiles_cull(cache, path.dentry, args);  in cachefiles_daemon_cull()
579 	cachefiles_end_secure(cache, saved_cred);  in cachefiles_daemon_cull()
599 static int cachefiles_daemon_debug(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_debug()  argument
622 static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_inuse()  argument
633 	if (!test_bit(CACHEFILES_READY, &cache->flags)) {  in cachefiles_daemon_inuse()
638 	if (test_bit(CACHEFILES_DEAD, &cache->flags)) {  in cachefiles_daemon_inuse()
649 	cachefiles_begin_secure(cache, &saved_cred);  in cachefiles_daemon_inuse()
650 	ret = cachefiles_check_in_use(cache, path.dentry, args);  in cachefiles_daemon_inuse()
651 	cachefiles_end_secure(cache, saved_cred);  in cachefiles_daemon_inuse()
671 int cachefiles_has_space(struct cachefiles_cache *cache,  in cachefiles_has_space()  argument
676 		.mnt	= cache->mnt,  in cachefiles_has_space()
677 		.dentry	= cache->mnt->mnt_root,  in cachefiles_has_space()
696 			cachefiles_io_error(cache, "statfs failed");  in cachefiles_has_space()
701 	stats.f_bavail >>= cache->bshift;  in cachefiles_has_space()
719 	if (stats.f_ffree < cache->fstop ||  in cachefiles_has_space()
720 	    stats.f_bavail < cache->bstop)  in cachefiles_has_space()
724 	if (stats.f_ffree < cache->fcull ||  in cachefiles_has_space()
725 	    stats.f_bavail < cache->bcull)  in cachefiles_has_space()
728 	if (test_bit(CACHEFILES_CULLING, &cache->flags) &&  in cachefiles_has_space()
729 	    stats.f_ffree >= cache->frun &&  in cachefiles_has_space()
730 	    stats.f_bavail >= cache->brun &&  in cachefiles_has_space()
731 	    test_and_clear_bit(CACHEFILES_CULLING, &cache->flags)  in cachefiles_has_space()
734 		cachefiles_state_changed(cache);  in cachefiles_has_space()
741 	if (!test_and_set_bit(CACHEFILES_CULLING, &cache->flags)) {  in cachefiles_has_space()
743 		cachefiles_state_changed(cache);  in cachefiles_has_space()