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author | Li Zefan <lizf@cn.fujitsu.com> | 2010-12-20 08:04:08 (GMT) |
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committer | Li Zefan <lizf@cn.fujitsu.com> | 2010-12-23 00:49:17 (GMT) |
commit | b83cc9693f39689490970c19f6c5b866f6719a70 (patch) | |
tree | b86d09884015fce195a4ac5ff1e8ec5f6ec00677 /fs/btrfs/transaction.h | |
parent | fa0d2b9bd717340e0bc4850a80ac0eb344e9a7fb (diff) | |
download | linux-fsl-qoriq-b83cc9693f39689490970c19f6c5b866f6719a70.tar.xz |
Btrfs: Add readonly snapshots support
Usage:
Set BTRFS_SUBVOL_RDONLY of btrfs_ioctl_vol_arg_v2->flags, and call
ioctl(BTRFS_I0CTL_SNAP_CREATE_V2).
Implementation:
- Set readonly bit of btrfs_root_item->flags.
- Add readonly checks in btrfs_permission (inode_permission),
btrfs_setattr, btrfs_set/remove_xattr and some ioctls.
Changelog for v3:
- Eliminate btrfs_root->readonly, but check btrfs_root->root_item.flags.
- Rename BTRFS_ROOT_SNAP_RDONLY to BTRFS_ROOT_SUBVOL_RDONLY.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Diffstat (limited to 'fs/btrfs/transaction.h')
-rw-r--r-- | fs/btrfs/transaction.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index f104b57..229a594 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -62,6 +62,7 @@ struct btrfs_pending_snapshot { struct btrfs_block_rsv block_rsv; /* extra metadata reseration for relocation */ int error; + bool readonly; struct list_head list; }; |