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switch nbd to sockfd_lookup/sockfd_put 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-03-05 20:41:36 -05:00
parent 09aaacf02a
commit e25115786e
2 changed files with 20 additions and 31 deletions
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48
drivers/block/nbd.c
View File

@ -630,37 +630,29 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
}
case NBD_CLEAR_SOCK: {
struct file *file;
struct socket *sock = nbd->sock;
nbd->sock = NULL;
file = nbd->file;
nbd->file = NULL;
nbd_clear_que(nbd);
BUG_ON(!list_empty(&nbd->queue_head));
BUG_ON(!list_empty(&nbd->waiting_queue));
kill_bdev(bdev);
if (file)
fput(file);
if (sock)
sockfd_put(sock);
return 0;
}
case NBD_SET_SOCK: {
struct file *file;
if (nbd->file)
struct socket *sock;
int err;
if (nbd->sock)
return -EBUSY;
file = fget(arg);
if (file) {
struct inode *inode = file_inode(file);
if (S_ISSOCK(inode->i_mode)) {
nbd->file = file;
nbd->sock = SOCKET_I(inode);
if (max_part > 0)
bdev->bd_invalidated = 1;
nbd->disconnect = 0; /* we're connected now */
return 0;
} else {
fput(file);
}
sock = sockfd_lookup(arg, &err);
if (sock) {
nbd->sock = sock;
if (max_part > 0)
bdev->bd_invalidated = 1;
nbd->disconnect = 0; /* we're connected now */
return 0;
}
return -EINVAL;
}
@ -697,12 +689,12 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
case NBD_DO_IT: {
struct task_struct *thread;
struct file *file;
struct socket *sock;
int error;
if (nbd->pid)
return -EBUSY;
if (!nbd->file)
if (!nbd->sock)
return -EINVAL;
mutex_unlock(&nbd->tx_lock);
@ -731,15 +723,15 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
if (error)
return error;
sock_shutdown(nbd, 0);
file = nbd->file;
nbd->file = NULL;
sock = nbd->sock;
nbd->sock = NULL;
nbd_clear_que(nbd);
dev_warn(disk_to_dev(nbd->disk), "queue cleared\n");
kill_bdev(bdev);
queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, nbd->disk->queue);
set_device_ro(bdev, false);
if (file)
fput(file);
if (sock)
sockfd_put(sock);
nbd->flags = 0;
nbd->bytesize = 0;
bdev->bd_inode->i_size = 0;
@ -875,9 +867,7 @@ static int __init nbd_init(void)
for (i = 0; i < nbds_max; i++) {
struct gendisk *disk = nbd_dev[i].disk;
nbd_dev[i].file = NULL;
nbd_dev[i].magic = NBD_MAGIC;
nbd_dev[i].flags = 0;
INIT_LIST_HEAD(&nbd_dev[i].waiting_queue);
spin_lock_init(&nbd_dev[i].queue_lock);
INIT_LIST_HEAD(&nbd_dev[i].queue_head);

3
include/linux/nbd.h
View File

@ -24,8 +24,7 @@ struct request;
struct nbd_device {
int flags;
int harderror; /* Code of hard error */
struct socket * sock;
struct file * file; /* If == NULL, device is not ready, yet */
struct socket * sock; /* If == NULL, device is not ready, yet */
int magic;
spinlock_t queue_lock;