69 	struct squashfs_cache_entry *entry;  in squashfs_cache_get()  local
75 			if (cache->entry[i].block == block) {  in squashfs_cache_get()
103 				if (cache->entry[i].refcount == 0)  in squashfs_cache_get()
109 			entry = &cache->entry[i];  in squashfs_cache_get()
116 			entry->block = block;  in squashfs_cache_get()
117 			entry->refcount = 1;  in squashfs_cache_get()
118 			entry->pending = 1;  in squashfs_cache_get()
119 			entry->num_waiters = 0;  in squashfs_cache_get()
120 			entry->error = 0;  in squashfs_cache_get()
123 			entry->length = squashfs_read_data(sb, block, length,  in squashfs_cache_get()
124 				&entry->next_index, entry->actor);  in squashfs_cache_get()
128 			if (entry->length < 0)  in squashfs_cache_get()
129 				entry->error = entry->length;  in squashfs_cache_get()
131 			entry->pending = 0;  in squashfs_cache_get()
138 			if (entry->num_waiters) {  in squashfs_cache_get()
140 				wake_up_all(&entry->wait_queue);  in squashfs_cache_get()
153 		entry = &cache->entry[i];  in squashfs_cache_get()
154 		if (entry->refcount == 0)  in squashfs_cache_get()
156 		entry->refcount++;  in squashfs_cache_get()
162 		if (entry->pending) {  in squashfs_cache_get()
163 			entry->num_waiters++;  in squashfs_cache_get()
165 			wait_event(entry->wait_queue, !entry->pending);  in squashfs_cache_get()
174 		cache->name, i, entry->block, entry->refcount, entry->error);  in squashfs_cache_get()
176 	if (entry->error)  in squashfs_cache_get()
179 	return entry;  in squashfs_cache_get()
186 void squashfs_cache_put(struct squashfs_cache_entry *entry)  in squashfs_cache_put()  argument
188 	struct squashfs_cache *cache = entry->cache;  in squashfs_cache_put()
191 	entry->refcount--;  in squashfs_cache_put()
192 	if (entry->refcount == 0) {  in squashfs_cache_put()
218 		if (cache->entry[i].data) {  in squashfs_cache_delete()
220 				kfree(cache->entry[i].data[j]);  in squashfs_cache_delete()
221 			kfree(cache->entry[i].data);  in squashfs_cache_delete()
223 		kfree(cache->entry[i].actor);  in squashfs_cache_delete()
226 	kfree(cache->entry);  in squashfs_cache_delete()
247 	cache->entry = kcalloc(entries, sizeof(*(cache->entry)), GFP_KERNEL);  in squashfs_cache_init()
248 	if (cache->entry == NULL) {  in squashfs_cache_init()
266 		struct squashfs_cache_entry *entry = &cache->entry[i];  in squashfs_cache_init()  local
268 		init_waitqueue_head(&cache->entry[i].wait_queue);  in squashfs_cache_init()
269 		entry->cache = cache;  in squashfs_cache_init()
270 		entry->block = SQUASHFS_INVALID_BLK;  in squashfs_cache_init()
271 		entry->data = kcalloc(cache->pages, sizeof(void *), GFP_KERNEL);  in squashfs_cache_init()
272 		if (entry->data == NULL) {  in squashfs_cache_init()
278 			entry->data[j] = kmalloc(PAGE_CACHE_SIZE, GFP_KERNEL);  in squashfs_cache_init()
279 			if (entry->data[j] == NULL) {  in squashfs_cache_init()
285 		entry->actor = squashfs_page_actor_init(entry->data,  in squashfs_cache_init()
287 		if (entry->actor == NULL) {  in squashfs_cache_init()
306 int squashfs_copy_data(void *buffer, struct squashfs_cache_entry *entry,  in squashfs_copy_data()  argument
314 		return min(length, entry->length - offset);  in squashfs_copy_data()
316 	while (offset < entry->length) {  in squashfs_copy_data()
317 		void *buff = entry->data[offset / PAGE_CACHE_SIZE]  in squashfs_copy_data()
319 		int bytes = min_t(int, entry->length - offset,  in squashfs_copy_data()
349 	struct squashfs_cache_entry *entry;  in squashfs_read_metadata()  local
354 		entry = squashfs_cache_get(sb, msblk->block_cache, *block, 0);  in squashfs_read_metadata()
355 		if (entry->error) {  in squashfs_read_metadata()
356 			res = entry->error;  in squashfs_read_metadata()
358 		} else if (*offset >= entry->length) {  in squashfs_read_metadata()
363 		bytes = squashfs_copy_data(buffer, entry, *offset, length);  in squashfs_read_metadata()
369 		if (*offset == entry->length) {  in squashfs_read_metadata()
370 			*block = entry->next_index;  in squashfs_read_metadata()
374 		squashfs_cache_put(entry);  in squashfs_read_metadata()
380 	squashfs_cache_put(entry);  in squashfs_read_metadata()