diff options
| author | David Sterba <dsterba@suse.cz> | 2013-12-12 19:11:26 +0100 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-01-31 08:22:20 -0800 |
| commit | 4b7656f3bf4bb204d567375eb6d43317521543fc (patch) | |
| tree | b4e895ab26929e0782d686d2593516ca3ef56730 /ioctl.h | |
| parent | 91bc44bd073020c27487b22ccf53a37d593d331e (diff) | |
btrfs-progs: add options to set commit mode after subvol delete
Subvolume deletion does not do a full transaction commit. This can lead
to an unexpected result when the system crashes between deletion and
commit, the subvolume directory will appear again. Add options to request
filesystem sync after each deleted subvolume or after the last one.
If the command with --commit option finishes succesfully, the
subvolume(s) deletion status is safely stored on the media.
Userspace approach is more flexible than in-kernel. Related discussions:
http://www.spinics.net/lists/linux-btrfs/msg22088.html
http://www.spinics.net/lists/linux-btrfs/msg27240.html
CC: Alex Lyakas <alex.btrfs@zadarastorage.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'ioctl.h')
| -rw-r--r-- | ioctl.h | 2 |
1 files changed, 2 insertions, 0 deletions
@@ -542,6 +542,8 @@ struct btrfs_ioctl_clone_range_args { #define BTRFS_IOC_DEFAULT_SUBVOL _IOW(BTRFS_IOCTL_MAGIC, 19, u64) #define BTRFS_IOC_SPACE_INFO _IOWR(BTRFS_IOCTL_MAGIC, 20, \ struct btrfs_ioctl_space_args) +#define BTRFS_IOC_START_SYNC _IOR(BTRFS_IOCTL_MAGIC, 24, __u64) +#define BTRFS_IOC_WAIT_SYNC _IOW(BTRFS_IOCTL_MAGIC, 22, __u64) #define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ struct btrfs_ioctl_vol_args_v2) #define BTRFS_IOC_SUBVOL_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 24, \ |