diff options
author | Alex Elder <elder@inktank.com> | 2012-11-16 09:29:16 -0600 |
---|---|---|
committer | Alex Elder <elder@inktank.com> | 2012-12-17 08:36:59 -0600 |
commit | 42382b709bd1d143b9f0fa93e0a3a1f2f4210707 (patch) | |
tree | 2d6a8c6910ab15bffed7ab91d74005e05984f891 /fs/xfs/xfs_dir2.h | |
parent | 8884d53dd63b1d9315b343564fcbe1ede004a99e (diff) |
rbd: do not allow remove of mounted-on image
There is no check in rbd_remove() to see if anybody holds open the
image being removed. That's not cool.
Add a simple open count that goes up and down with opens and closes
(releases) of the device, and don't allow an rbd image to be removed
if the count is non-zero.
Protect the updates of the open count value with ctl_mutex to ensure
the underlying rbd device doesn't get removed while concurrently
being opened.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs/xfs/xfs_dir2.h')
0 files changed, 0 insertions, 0 deletions