From mboxrd@z Thu Jan 1 00:00:00 1970 From: Li Zefan Subject: [PATCH v2 0/5] Btrfs: Readonly snapshots Date: Thu, 09 Dec 2010 17:09:38 +0800 Message-ID: <4D009CD2.3060805@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 To: "linux-btrfs@vger.kernel.org" Return-path: List-ID: This patchset adds readonly-snapshots support. You can create a readonly snapshot, and you can also set a snapshot (subvolume also) readonly/writable on the fly. A few readonly checks are added in setattr, permission, remove_xattr and set_xattr callbacks, as well as in some ioctls. The patchset is also available in: git://repo.or.cz/linux-btrfs-devel.git readonly-snapshots Note: I've changed the async snapshot ABI. So if the patchset is acceptable, the first patch has to be merged into .37 to avoid ABI breakage. --- fs/btrfs/ctree.h | 3 + fs/btrfs/disk-io.c | 36 +++++---- fs/btrfs/inode.c | 8 ++ fs/btrfs/ioctl.c | 193 +++++++++++++++++++++++++++++++++++++++--------- fs/btrfs/ioctl.h | 19 ++++- fs/btrfs/transaction.c | 8 ++ fs/btrfs/transaction.h | 1 + fs/btrfs/xattr.c | 18 +++++ 8 files changed, 230 insertions(+), 56 deletions(-)