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| author | Alex Elder | 2012-10-31 01:40:33 +0100 |
|---|---|---|
| committer | Alex Elder | 2012-11-01 13:55:42 +0100 |
| commit | 2c0d0a10ea89456781218f458f6bf72e99d87d2a (patch) | |
| tree | d813b4eaebe1cadf6964347a304bc40e85fab757 /drivers/block/rbd.c | |
| parent | rbd: encapsulate last part of probe (diff) | |
| download | kernel-qcow2-linux-2c0d0a10ea89456781218f458f6bf72e99d87d2a.tar.gz kernel-qcow2-linux-2c0d0a10ea89456781218f458f6bf72e99d87d2a.tar.xz kernel-qcow2-linux-2c0d0a10ea89456781218f458f6bf72e99d87d2a.zip | |
rbd: allow null image name
We will know the image id for format 2 parent images, but won't
initially know its image name. Avoid making the query for an image
id in rbd_dev_image_id() if it's already known.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
Diffstat (limited to 'drivers/block/rbd.c')
| -rw-r--r-- | drivers/block/rbd.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 8d26c0f2be14..a8521338bf46 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3068,6 +3068,14 @@ static int rbd_dev_image_id(struct rbd_device *rbd_dev) void *p; /* + * When probing a parent image, the image id is already + * known (and the image name likely is not). There's no + * need to fetch the image id again in this case. + */ + if (rbd_dev->spec->image_id) + return 0; + + /* * First, see if the format 2 image id file exists, and if * so, get the image's persistent id from it. */ |