27 #define bsg_dbg(bd, fmt, ...) \  argument
28 	pr_debug("%s: " fmt, (bd)->name, ##__VA_ARGS__)
201 	struct bsg_device *bd;  in bsg_alloc_device()  local
203 	bd = kzalloc(sizeof(struct bsg_device), GFP_KERNEL);  in bsg_alloc_device()
204 	if (unlikely(!bd))  in bsg_alloc_device()
207 	spin_lock_init(&bd->lock);  in bsg_alloc_device()
208 	bd->max_queue = BSG_DEFAULT_CMDS;  in bsg_alloc_device()
209 	INIT_HLIST_NODE(&bd->dev_list);  in bsg_alloc_device()
210 	return bd;  in bsg_alloc_device()
213 static int bsg_put_device(struct bsg_device *bd)  in bsg_put_device()  argument
215 	struct request_queue *q = bd->queue;  in bsg_put_device()
219 	if (!refcount_dec_and_test(&bd->ref_count)) {  in bsg_put_device()
224 	hlist_del(&bd->dev_list);  in bsg_put_device()
227 	bsg_dbg(bd, "tearing down\n");  in bsg_put_device()
232 	kfree(bd);  in bsg_put_device()
241 	struct bsg_device *bd;  in bsg_add_device()  local
249 	bd = bsg_alloc_device();  in bsg_add_device()
250 	if (!bd) {  in bsg_add_device()
255 	bd->queue = rq;  in bsg_add_device()
257 	refcount_set(&bd->ref_count, 1);  in bsg_add_device()
258 	hlist_add_head(&bd->dev_list, bsg_dev_idx_hash(iminor(inode)));  in bsg_add_device()
260 	strncpy(bd->name, dev_name(rq->bsg_dev.class_dev), sizeof(bd->name) - 1);  in bsg_add_device()
261 	bsg_dbg(bd, "bound to <%s>, max queue %d\n",  in bsg_add_device()
262 		format_dev_t(buf, inode->i_rdev), bd->max_queue);  in bsg_add_device()
264 	return bd;  in bsg_add_device()
269 	struct bsg_device *bd;  in __bsg_get_device()  local
273 	hlist_for_each_entry(bd, bsg_dev_idx_hash(minor), dev_list) {  in __bsg_get_device()
274 		if (bd->queue == q) {  in __bsg_get_device()
275 			refcount_inc(&bd->ref_count);  in __bsg_get_device()
279 	bd = NULL;  in __bsg_get_device()
281 	return bd;  in __bsg_get_device()
286 	struct bsg_device *bd;  in bsg_get_device()  local
296 		bd = ERR_PTR(-ENODEV);  in bsg_get_device()
300 	bd = __bsg_get_device(iminor(inode), bcd->queue);  in bsg_get_device()
301 	if (!bd)  in bsg_get_device()
302 		bd = bsg_add_device(inode, bcd->queue, file);  in bsg_get_device()
306 	return bd;  in bsg_get_device()
311 	struct bsg_device *bd;  in bsg_open()  local
314 	bd = bsg_get_device(inode, file);  in bsg_open()
316 	if (IS_ERR(bd))  in bsg_open()
317 		return PTR_ERR(bd);  in bsg_open()
319 	bcd = &bd->queue->bsg_dev;  in bsg_open()
321 	file->private_data = bd;  in bsg_open()
327 	struct bsg_device *bd = file->private_data;  in bsg_release()  local
332 	bcd = &bd->queue->bsg_dev;  in bsg_release()
334 	return bsg_put_device(bd);  in bsg_release()
337 static int bsg_get_command_q(struct bsg_device *bd, int __user *uarg)  in bsg_get_command_q()  argument
339 	return put_user(bd->max_queue, uarg);  in bsg_get_command_q()
342 static int bsg_set_command_q(struct bsg_device *bd, int __user *uarg)  in bsg_set_command_q()  argument
351 	spin_lock_irq(&bd->lock);  in bsg_set_command_q()
352 	bd->max_queue = queue;  in bsg_set_command_q()
353 	spin_unlock_irq(&bd->lock);  in bsg_set_command_q()
359 	struct bsg_device *bd = file->private_data;  in bsg_ioctl()  local
367 		return bsg_get_command_q(bd, uarg);  in bsg_ioctl()
369 		return bsg_set_command_q(bd, uarg);  in bsg_ioctl()
382 		return scsi_cmd_ioctl(bd->queue, NULL, file->f_mode, cmd, uarg);  in bsg_ioctl()
384 		return bsg_sg_io(bd->queue, file->f_mode, uarg);  in bsg_ioctl()