This is a first draft of a subvolume quota implementation. It is possible to limit subvolumes and any group of subvolumes and also to track the amount of space that will get freed when deleting snapshots. The current version is functionally incomplete, with the main missing feature being the initial scan and rescan of an existing filesystem. I put some effort into writing an introduction into the concepts and implementation which can be found at http://sensille.com/qgroups.pdf The purpose of getting it out in this early stage is to get as much input as possible, in regard to concepts, implementation and testing. The accompanying user mode parts will take some additional days to gather. Thanks, Arne Arne Jansen (18): btrfs: mark delayed refs as for cow btrfs: always save ref_root in delayed refs btrfs: add nested locking mode for paths btrfs: qgroup on-disk format btrfs: add helper for tree enumeration btrfs: check the root passed to btrfs_end_transaction btrfs: generic data structure to build unique lists btrfs: added helper to create new trees btrfs: qgroup state and initialization btrfs: Test code to change the order of delayed-ref processing btrfs: add sequence numbers to delayed refs btrfs: put back delayed refs that are too new btrfs: qgroup implementation and prototypes btrfs: quota tree support and startup btrfs: hooks for qgroup to record delayed refs btrfs: hooks to reserve qgroup space btrfs: add qgroup ioctls btrfs: add qgroup inheritance fs/btrfs/Makefile | 3 +- fs/btrfs/ctree.c | 114 +++- fs/btrfs/ctree.h | 224 +++++- fs/btrfs/delayed-ref.c | 188 ++++-- fs/btrfs/delayed-ref.h | 48 +- fs/btrfs/disk-io.c | 130 +++- fs/btrfs/disk-io.h | 3 + fs/btrfs/extent-tree.c | 185 ++++- fs/btrfs/extent_io.c | 1 + fs/btrfs/extent_io.h | 2 + fs/btrfs/file.c | 10 +- fs/btrfs/inode.c | 2 +- fs/btrfs/ioctl.c | 247 +++++- fs/btrfs/ioctl.h | 62 ++- fs/btrfs/locking.c | 51 ++- fs/btrfs/locking.h | 2 +- fs/btrfs/qgroup.c | 2151 ++++++++++++++++++++++++++++++++++++++++++++++++ fs/btrfs/relocation.c | 18 +- fs/btrfs/transaction.c | 45 +- fs/btrfs/transaction.h | 8 + fs/btrfs/tree-log.c | 2 +- fs/btrfs/ulist.c | 122 +++ fs/btrfs/ulist.h | 59 ++ 23 files changed, 3501 insertions(+), 176 deletions(-) create mode 100644 fs/btrfs/qgroup.c create mode 100644 fs/btrfs/ulist.c create mode 100644 fs/btrfs/ulist.h -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
