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| author | Li Zefan <lizf@cn.fujitsu.com> | 2010-12-10 06:41:56 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-12-10 16:29:11 -0500 |
| commit | fdfb1e4f6c61477a61890b64974d65cdc3a98702 (patch) | |
| tree | 2bb65569dfbcfe12e4d54449d018abeebf88e89d /fs/btrfs/ioctl.h | |
| parent | 914ee295af418e936ec20a08c1663eaabe4cd07a (diff) | |
| download | linux-fdfb1e4f6c61477a61890b64974d65cdc3a98702.tar.gz linux-fdfb1e4f6c61477a61890b64974d65cdc3a98702.tar.bz2 linux-fdfb1e4f6c61477a61890b64974d65cdc3a98702.zip | |
Btrfs: Make async snapshot ioctl more generic
If we had reserved some bytes in struct btrfs_ioctl_vol_args, we
wouldn't have to create a new structure for async snapshot creation.
Here we convert async snapshot ioctl to use a more generic ABI, as
we'll add more ioctls for snapshots/subvolumes in the future, readonly
snapshots for example.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ioctl.h')
| -rw-r--r-- | fs/btrfs/ioctl.h | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index 17c99ebdf960..c344d12c646b 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -30,11 +30,15 @@ struct btrfs_ioctl_vol_args { char name[BTRFS_PATH_NAME_MAX + 1]; }; -#define BTRFS_SNAPSHOT_NAME_MAX 4079 -struct btrfs_ioctl_async_vol_args { +#define BTRFS_SUBVOL_CREATE_ASYNC (1ULL << 0) + +#define BTRFS_SUBVOL_NAME_MAX 4039 +struct btrfs_ioctl_vol_args_v2 { __s64 fd; __u64 transid; - char name[BTRFS_SNAPSHOT_NAME_MAX + 1]; + __u64 flags; + __u64 unused[4]; + char name[BTRFS_SUBVOL_NAME_MAX + 1]; }; #define BTRFS_INO_LOOKUP_PATH_MAX 4080 @@ -187,6 +191,6 @@ struct btrfs_ioctl_space_args { 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_ASYNC _IOW(BTRFS_IOCTL_MAGIC, 23, \ - struct btrfs_ioctl_async_vol_args) +#define BTRFS_IOC_SNAP_CREATE_V2 _IOW(BTRFS_IOCTL_MAGIC, 23, \ + struct btrfs_ioctl_vol_args_v2) #endif |