63 	int (*handler)(struct cachefiles_cache *cache, char *args);
89 	struct cachefiles_cache *cache;  in cachefiles_daemon_open()  local
102 	cache = kzalloc(sizeof(struct cachefiles_cache), GFP_KERNEL);  in cachefiles_daemon_open()
103 	if (!cache) {  in cachefiles_daemon_open()
108 	mutex_init(&cache->daemon_mutex);  in cachefiles_daemon_open()
109 	cache->active_nodes = RB_ROOT;  in cachefiles_daemon_open()
110 	rwlock_init(&cache->active_lock);  in cachefiles_daemon_open()
111 	init_waitqueue_head(&cache->daemon_pollwq);  in cachefiles_daemon_open()
118 	cache->frun_percent = 7;  in cachefiles_daemon_open()
119 	cache->fcull_percent = 5;  in cachefiles_daemon_open()
120 	cache->fstop_percent = 1;  in cachefiles_daemon_open()
121 	cache->brun_percent = 7;  in cachefiles_daemon_open()
122 	cache->bcull_percent = 5;  in cachefiles_daemon_open()
123 	cache->bstop_percent = 1;  in cachefiles_daemon_open()
125 	file->private_data = cache;  in cachefiles_daemon_open()
126 	cache->cachefilesd = file;  in cachefiles_daemon_open()
135 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_release()  local
139 	ASSERT(cache);  in cachefiles_daemon_release()
141 	set_bit(CACHEFILES_DEAD, &cache->flags);  in cachefiles_daemon_release()
143 	cachefiles_daemon_unbind(cache);  in cachefiles_daemon_release()
145 	ASSERT(!cache->active_nodes.rb_node);  in cachefiles_daemon_release()
148 	cache->cachefilesd = NULL;  in cachefiles_daemon_release()
152 	kfree(cache);  in cachefiles_daemon_release()
164 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_read()  local
170 	if (!test_bit(CACHEFILES_READY, &cache->flags))  in cachefiles_daemon_read()
174 	cachefiles_has_space(cache, 0, 0);  in cachefiles_daemon_read()
177 	clear_bit(CACHEFILES_STATE_CHANGED, &cache->flags);  in cachefiles_daemon_read()
187 		     test_bit(CACHEFILES_CULLING, &cache->flags) ? '1' : '0',  in cachefiles_daemon_read()
188 		     (unsigned long long) cache->frun,  in cachefiles_daemon_read()
189 		     (unsigned long long) cache->fcull,  in cachefiles_daemon_read()
190 		     (unsigned long long) cache->fstop,  in cachefiles_daemon_read()
191 		     (unsigned long long) cache->brun,  in cachefiles_daemon_read()
192 		     (unsigned long long) cache->bcull,  in cachefiles_daemon_read()
193 		     (unsigned long long) cache->bstop  in cachefiles_daemon_read()
214 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_write()  local
220 	ASSERT(cache);  in cachefiles_daemon_write()
222 	if (test_bit(CACHEFILES_DEAD, &cache->flags))  in cachefiles_daemon_write()
276 	mutex_lock(&cache->daemon_mutex);  in cachefiles_daemon_write()
279 	if (!test_bit(CACHEFILES_DEAD, &cache->flags))  in cachefiles_daemon_write()
280 		ret = cmd->handler(cache, args);  in cachefiles_daemon_write()
282 	mutex_unlock(&cache->daemon_mutex);  in cachefiles_daemon_write()
296 	struct cachefiles_cache *cache = file->private_data;  in cachefiles_daemon_poll()  local
299 	poll_wait(file, &cache->daemon_pollwq, poll);  in cachefiles_daemon_poll()
302 	if (test_bit(CACHEFILES_STATE_CHANGED, &cache->flags))  in cachefiles_daemon_poll()
305 	if (test_bit(CACHEFILES_CULLING, &cache->flags))  in cachefiles_daemon_poll()
315 static int cachefiles_daemon_range_error(struct cachefiles_cache *cache,  in cachefiles_daemon_range_error()  argument
327 static int cachefiles_daemon_frun(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_frun()  argument
340 	if (frun <= cache->fcull_percent || frun >= 100)  in cachefiles_daemon_frun()
341 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_frun()
343 	cache->frun_percent = frun;  in cachefiles_daemon_frun()
351 static int cachefiles_daemon_fcull(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_fcull()  argument
364 	if (fcull <= cache->fstop_percent || fcull >= cache->frun_percent)  in cachefiles_daemon_fcull()
365 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_fcull()
367 	cache->fcull_percent = fcull;  in cachefiles_daemon_fcull()
375 static int cachefiles_daemon_fstop(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_fstop()  argument
388 	if (fstop < 0 || fstop >= cache->fcull_percent)  in cachefiles_daemon_fstop()
389 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_fstop()
391 	cache->fstop_percent = fstop;  in cachefiles_daemon_fstop()
399 static int cachefiles_daemon_brun(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_brun()  argument
412 	if (brun <= cache->bcull_percent || brun >= 100)  in cachefiles_daemon_brun()
413 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_brun()
415 	cache->brun_percent = brun;  in cachefiles_daemon_brun()
423 static int cachefiles_daemon_bcull(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_bcull()  argument
436 	if (bcull <= cache->bstop_percent || bcull >= cache->brun_percent)  in cachefiles_daemon_bcull()
437 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_bcull()
439 	cache->bcull_percent = bcull;  in cachefiles_daemon_bcull()
447 static int cachefiles_daemon_bstop(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_bstop()  argument
460 	if (bstop < 0 || bstop >= cache->bcull_percent)  in cachefiles_daemon_bstop()
461 		return cachefiles_daemon_range_error(cache, args);  in cachefiles_daemon_bstop()
463 	cache->bstop_percent = bstop;  in cachefiles_daemon_bstop()
471 static int cachefiles_daemon_dir(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_dir()  argument
482 	if (cache->rootdirname) {  in cachefiles_daemon_dir()
491 	cache->rootdirname = dir;  in cachefiles_daemon_dir()
499 static int cachefiles_daemon_secctx(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_secctx()  argument
510 	if (cache->secctx) {  in cachefiles_daemon_secctx()
519 	cache->secctx = secctx;  in cachefiles_daemon_secctx()
527 static int cachefiles_daemon_tag(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_tag()  argument
538 	if (cache->tag)  in cachefiles_daemon_tag()
545 	cache->tag = tag;  in cachefiles_daemon_tag()
553 static int cachefiles_daemon_cull(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_cull()  argument
564 	if (!test_bit(CACHEFILES_READY, &cache->flags)) {  in cachefiles_daemon_cull()
569 	if (test_bit(CACHEFILES_DEAD, &cache->flags)) {  in cachefiles_daemon_cull()
580 	cachefiles_begin_secure(cache, &saved_cred);  in cachefiles_daemon_cull()
581 	ret = cachefiles_cull(cache, path.dentry, args);  in cachefiles_daemon_cull()
582 	cachefiles_end_secure(cache, saved_cred);  in cachefiles_daemon_cull()
602 static int cachefiles_daemon_debug(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_debug()  argument
625 static int cachefiles_daemon_inuse(struct cachefiles_cache *cache, char *args)  in cachefiles_daemon_inuse()  argument
636 	if (!test_bit(CACHEFILES_READY, &cache->flags)) {  in cachefiles_daemon_inuse()
641 	if (test_bit(CACHEFILES_DEAD, &cache->flags)) {  in cachefiles_daemon_inuse()
652 	cachefiles_begin_secure(cache, &saved_cred);  in cachefiles_daemon_inuse()
653 	ret = cachefiles_check_in_use(cache, path.dentry, args);  in cachefiles_daemon_inuse()
654 	cachefiles_end_secure(cache, saved_cred);  in cachefiles_daemon_inuse()
674 int cachefiles_has_space(struct cachefiles_cache *cache,  in cachefiles_has_space()  argument
679 		.mnt	= cache->mnt,  in cachefiles_has_space()
680 		.dentry	= cache->mnt->mnt_root,  in cachefiles_has_space()
699 			cachefiles_io_error(cache, "statfs failed");  in cachefiles_has_space()
704 	stats.f_bavail >>= cache->bshift;  in cachefiles_has_space()
722 	if (stats.f_ffree < cache->fstop ||  in cachefiles_has_space()
723 	    stats.f_bavail < cache->bstop)  in cachefiles_has_space()
727 	if (stats.f_ffree < cache->fcull ||  in cachefiles_has_space()
728 	    stats.f_bavail < cache->bcull)  in cachefiles_has_space()
731 	if (test_bit(CACHEFILES_CULLING, &cache->flags) &&  in cachefiles_has_space()
732 	    stats.f_ffree >= cache->frun &&  in cachefiles_has_space()
733 	    stats.f_bavail >= cache->brun &&  in cachefiles_has_space()
734 	    test_and_clear_bit(CACHEFILES_CULLING, &cache->flags)  in cachefiles_has_space()
737 		cachefiles_state_changed(cache);  in cachefiles_has_space()
744 	if (!test_and_set_bit(CACHEFILES_CULLING, &cache->flags)) {  in cachefiles_has_space()
746 		cachefiles_state_changed(cache);  in cachefiles_has_space()