| commit | d240e06713007bba309b074a386b7072b73c31a6 | |
| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | |
| Sun, 9 May 2010 12:51:53 +0000 (9 21:51 +0900) | ||
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | |
| Mon, 10 May 2010 02:32:34 +0000 (10 11:32 +0900) | ||
| tree | 3c9133ae5b349aeec8c0a93338b9dd13b9c9dac1 | treesnapshot (tar.gz zip) |
| parent | cdce214e39814fd46d47e0e660ca3ddf3fdce8a6 | commitdiff |
nilfs2: disallow remount of snapshot from/to a regular mount
Snapshots and regular ro/rw mounts are essentially-different within
the meaning whether the checkpoint is static or not and is marked with
a snapshot flag or not.
The current implemenation, however, allows to remount a snapshot to a
regular rw-mount if the checkpoint number equals the latest one.
This transition is actually impossible since changing a checkpoint to
a snapshot makes another checkpoint, thus the condition is never
satisfied.
This fixes the weird state of affairs, and specifically separates
snapshots and regular rw/ro-mounts.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Snapshots and regular ro/rw mounts are essentially-different within
the meaning whether the checkpoint is static or not and is marked with
a snapshot flag or not.
The current implemenation, however, allows to remount a snapshot to a
regular rw-mount if the checkpoint number equals the latest one.
This transition is actually impossible since changing a checkpoint to
a snapshot makes another checkpoint, thus the condition is never
satisfied.
This fixes the weird state of affairs, and specifically separates
snapshots and regular rw/ro-mounts.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
| fs/nilfs2/super.c | diffblobblamehistory |