From e6a76272d0fb50cb3cc773f4fc6f67c14fb4b157 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 14 Aug 2017 18:25:33 +0000 Subject: [PATCH] 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 Signed-off-by: Jens Axboe --- drivers/block/nbd.c | 9 +++++++++ 1 file changed, 9 insertions(+) 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",