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| author | Alex Elder <elder@inktank.com> | 2012-11-16 16:29:16 +0100 |
|---|---|---|
| committer | Alex Elder <elder@inktank.com> | 2012-12-17 15:36:59 +0100 |
| commit | 42382b709bd1d143b9f0fa93e0a3a1f2f4210707 (patch) | |
| tree | 2d6a8c6910ab15bffed7ab91d74005e05984f891 /net/rds/iw_sysctl.c | |
| parent | libceph: Unlock unprocessed pages in start_read() error path (diff) | |
| download | linux-42382b709bd1d143b9f0fa93e0a3a1f2f4210707.tar.xz linux-42382b709bd1d143b9f0fa93e0a3a1f2f4210707.zip | |
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 'net/rds/iw_sysctl.c')
0 files changed, 0 insertions, 0 deletions