diff options
| author | Josef Bacik | 2017-08-14 20:25:33 +0200 |
|---|---|---|
| committer | Jens Axboe | 2017-08-17 19:02:57 +0200 |
| commit | e6a76272d0fb50cb3cc773f4fc6f67c14fb4b157 (patch) | |
| tree | 998d7a6b571ef5f6090a742ee478bcde8c7ca313 /drivers/block/nbd.c | |
| parent | loop: fix to a race condition due to the early registration of device (diff) | |
| download | kernel-qcow2-linux-e6a76272d0fb50cb3cc773f4fc6f67c14fb4b157.tar.gz kernel-qcow2-linux-e6a76272d0fb50cb3cc773f4fc6f67c14fb4b157.tar.xz kernel-qcow2-linux-e6a76272d0fb50cb3cc773f4fc6f67c14fb4b157.zip | |
nbd: allow device creation at a specific index
If users really want to use a particular index for their nbd device and it
doesn't already exist there's no reason we can't just create it for them. Do
this instead of erroring out.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block/nbd.c')
| -rw-r--r-- | drivers/block/nbd.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 5bdf923294a5..d816ae7db205 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -1584,6 +1584,15 @@ again: } } else { nbd = idr_find(&nbd_index_idr, index); + if (!nbd) { + ret = nbd_dev_add(index); + if (ret < 0) { + mutex_unlock(&nbd_index_mutex); + printk(KERN_ERR "nbd: failed to add new device\n"); + return ret; + } + nbd = idr_find(&nbd_index_idr, index); + } } if (!nbd) { printk(KERN_ERR "nbd: couldn't find device at index %d\n", |