70 	struct squashfs_cache_entry *entry;  in squashfs_cache_get()  local
76 			if (cache->entry[i].block == block)  in squashfs_cache_get()
100 				if (cache->entry[i].refcount == 0)  in squashfs_cache_get()
106 			entry = &cache->entry[i];  in squashfs_cache_get()
113 			entry->block = block;  in squashfs_cache_get()
114 			entry->refcount = 1;  in squashfs_cache_get()
115 			entry->pending = 1;  in squashfs_cache_get()
116 			entry->num_waiters = 0;  in squashfs_cache_get()
117 			entry->error = 0;  in squashfs_cache_get()
120 			entry->length = squashfs_read_data(sb, entry->data,  in squashfs_cache_get()
121 				block, length, &entry->next_index,  in squashfs_cache_get()
126 			if (entry->length < 0)  in squashfs_cache_get()
127 				entry->error = entry->length;  in squashfs_cache_get()
129 			entry->pending = 0;  in squashfs_cache_get()
136 			if (entry->num_waiters) {  in squashfs_cache_get()
138 				wake_up_all(&entry->wait_queue);  in squashfs_cache_get()
151 		entry = &cache->entry[i];  in squashfs_cache_get()
152 		if (entry->refcount == 0)  in squashfs_cache_get()
154 		entry->refcount++;  in squashfs_cache_get()
160 		if (entry->pending) {  in squashfs_cache_get()
161 			entry->num_waiters++;  in squashfs_cache_get()
163 			wait_event(entry->wait_queue, !entry->pending);  in squashfs_cache_get()
172 		cache->name, i, entry->block, entry->refcount, entry->error);  in squashfs_cache_get()
174 	if (entry->error)  in squashfs_cache_get()
177 	return entry;  in squashfs_cache_get()
184 void squashfs_cache_put(struct squashfs_cache_entry *entry)  in squashfs_cache_put()  argument
186 	struct squashfs_cache *cache = entry->cache;  in squashfs_cache_put()
189 	entry->refcount--;  in squashfs_cache_put()
190 	if (entry->refcount == 0) {  in squashfs_cache_put()
216 		if (cache->entry[i].data) {  in squashfs_cache_delete()
218 				kfree(cache->entry[i].data[j]);  in squashfs_cache_delete()
219 			kfree(cache->entry[i].data);  in squashfs_cache_delete()
223 	kfree(cache->entry);  in squashfs_cache_delete()
244 	cache->entry = kcalloc(entries, sizeof(*(cache->entry)), GFP_KERNEL);  in squashfs_cache_init()
245 	if (cache->entry == NULL) {  in squashfs_cache_init()
261 		struct squashfs_cache_entry *entry = &cache->entry[i];  in squashfs_cache_init()  local
263 		init_waitqueue_head(&cache->entry[i].wait_queue);  in squashfs_cache_init()
264 		entry->cache = cache;  in squashfs_cache_init()
265 		entry->block = SQUASHFS_INVALID_BLK;  in squashfs_cache_init()
266 		entry->data = kcalloc(cache->pages, sizeof(void *), GFP_KERNEL);  in squashfs_cache_init()
267 		if (entry->data == NULL) {  in squashfs_cache_init()
273 			entry->data[j] = kmalloc(PAGE_CACHE_SIZE, GFP_KERNEL);  in squashfs_cache_init()
274 			if (entry->data[j] == NULL) {  in squashfs_cache_init()
294 int squashfs_copy_data(void *buffer, struct squashfs_cache_entry *entry,  in squashfs_copy_data()  argument
302 		return min(length, entry->length - offset);  in squashfs_copy_data()
304 	while (offset < entry->length) {  in squashfs_copy_data()
305 		void *buff = entry->data[offset / PAGE_CACHE_SIZE]  in squashfs_copy_data()
307 		int bytes = min_t(int, entry->length - offset,  in squashfs_copy_data()
337 	struct squashfs_cache_entry *entry;  in squashfs_read_metadata()  local
342 		entry = squashfs_cache_get(sb, msblk->block_cache, *block, 0);  in squashfs_read_metadata()
343 		if (entry->error)  in squashfs_read_metadata()
344 			return entry->error;  in squashfs_read_metadata()
345 		else if (*offset >= entry->length)  in squashfs_read_metadata()
348 		bytes = squashfs_copy_data(buffer, entry, *offset, length);  in squashfs_read_metadata()
354 		if (*offset == entry->length) {  in squashfs_read_metadata()
355 			*block = entry->next_index;  in squashfs_read_metadata()
359 		squashfs_cache_put(entry);  in squashfs_read_metadata()