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rbd: only reset capacity when pointing to head

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Snapshots cannot be resized, and the new capacity of head should not
be reflected by the snapshot.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Josh Durgin 2011-11-21 17:13:54 -08:00 committed by Sage Weil
parent e88a36ec96
commit 474ef7ce83
1 changed files with 6 additions and 1 deletions
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7
drivers/block/rbd.c
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@ -1725,7 +1725,12 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev)
return ret;
/* resized? */
set_capacity(rbd_dev->disk, h.image_size / SECTOR_SIZE);
if (rbd_dev->snap_id == CEPH_NOSNAP) {
sector_t size = (sector_t) h.image_size / SECTOR_SIZE;
dout("setting size to %llu sectors", (unsigned long long) size);
set_capacity(rbd_dev->disk, size);
}
down_write(&rbd_dev->header_rwsem);