diff options
| author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-16 10:48:46 -0400 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-05-25 10:34:50 -0400 |
| commit | a22285a6a32390195235171b89d157ed1a1fe932 (patch) | |
| tree | 3fabc88a029e1af4f2fdcc708e7b62ef3cf3703a /fs/btrfs/inode-item.c | |
| parent | f0486c68e4bd9a06a5904d3eeb3a0d73a83befb8 (diff) | |
Btrfs: Integrate metadata reservation with start_transaction
Besides simplify the code, this change makes sure all metadata
reservation for normal metadata operations are released after
committing transaction.
Changes since V1:
Add code that check if unlink and rmdir will free space.
Add ENOSPC handling for clone ioctl.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode-item.c')
| -rw-r--r-- | fs/btrfs/inode-item.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c index 72ce3c173d6a..64f1150bb48d 100644 --- a/fs/btrfs/inode-item.c +++ b/fs/btrfs/inode-item.c @@ -49,6 +49,33 @@ static int find_name_in_backref(struct btrfs_path *path, const char *name, return 0; } +struct btrfs_inode_ref * +btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct btrfs_path *path, + const char *name, int name_len, + u64 inode_objectid, u64 ref_objectid, int mod) +{ + struct btrfs_key key; + struct btrfs_inode_ref *ref; + int ins_len = mod < 0 ? -1 : 0; + int cow = mod != 0; + int ret; + + key.objectid = inode_objectid; + key.type = BTRFS_INODE_REF_KEY; + key.offset = ref_objectid; + + ret = btrfs_search_slot(trans, root, &key, path, ins_len, cow); + if (ret < 0) + return ERR_PTR(ret); + if (ret > 0) + return NULL; + if (!find_name_in_backref(path, name, name_len, &ref)) + return NULL; + return ref; +} + int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, const char *name, int name_len, |