diff options
author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-16 10:49:58 -0400 |
---|---|---|
committer | Chris Mason <chris.mason@oracle.com> | 2010-05-25 10:34:52 -0400 |
commit | d68fc57b7e3245cfacf2e3b47acfed1946a11786 (patch) | |
tree | c2572fcd935017440c8370c8a12ceb49a7fc4f1f /fs/btrfs/extent-tree.c | |
parent | 8929ecfa50f266163832eeacfbc3642ed5eb83b6 (diff) |
Btrfs: Metadata reservation for orphan inodes
reserve metadata space for handling orphan inodes
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r-- | fs/btrfs/extent-tree.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index cb814a71800..a713f69f0c7 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3626,6 +3626,34 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, trans->bytes_reserved = 0; } +int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, + struct inode *inode) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + struct btrfs_block_rsv *src_rsv = get_block_rsv(trans, root); + struct btrfs_block_rsv *dst_rsv = root->orphan_block_rsv; + + /* + * one for deleting orphan item, one for updating inode and + * two for calling btrfs_truncate_inode_items. + * + * btrfs_truncate_inode_items is a delete operation, it frees + * more space than it uses in most cases. So two units of + * metadata space should be enough for calling it many times. + * If all of the metadata space is used, we can commit + * transaction and use space it freed. + */ + u64 num_bytes = calc_trans_metadata_size(root, 4); + return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes); +} + +void btrfs_orphan_release_metadata(struct inode *inode) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + u64 num_bytes = calc_trans_metadata_size(root, 4); + btrfs_block_rsv_release(root, root->orphan_block_rsv, num_bytes); +} + int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, struct btrfs_pending_snapshot *pending) { |