On Fri, Nov 01, 2013 at 12:00:10AM -0700, Kelley Nielsen wrote: > This patch is the second step in bootstrapping the btrfs_find_item > interface. The function btrfs_find_root_ref is similar to the former > __inode_info; it accepts four of its parameters, and duplicates the > first half of its functionality. > > The one former call to btrfs_find_root_ref has been replaced with a > call to btrfs_find_item, along with the defined key type that was used > internally by btrfs_find_root ref, and a null found key. In > btrfs_find_item, a test for the null key has been added at the place > where the functionality of btrfs_find_root_ref ends; btrfs_find_item > then returns if the test passes. Finally, btrfs_find_root_ref has been > removed.
Write your commit messages in imperative form, not passive voice: Replace the one former call to btrfs_find_root_ref with a call to btrfs_find_item, along with the defined key type used internally by btrfs_find_root ref, and a null found key. In btrfs_find_item, add a test for the null key at the place where the functionality of btrfs_find_root_ref ends; btrfs_find_item then returns if the test passes. Finally, remove btrfs_find_root_ref. > > Signed-off-by: Kelley Nielsen <[email protected]> > Suggested-by: Zach Brown <[email protected]> Reviewed-by: Josh Triplett <[email protected]> > --- > fs/btrfs/ctree.c | 10 ++++++++-- > fs/btrfs/inode.c | 6 +++--- > fs/btrfs/root-tree.c | 15 --------------- > 3 files changed, 11 insertions(+), 20 deletions(-) > > diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c > index 3828352..498b19d 100644 > --- a/fs/btrfs/ctree.c > +++ b/fs/btrfs/ctree.c > @@ -2465,7 +2465,13 @@ static int key_search(struct extent_buffer *b, struct > btrfs_key *key, > /* Proposed generic search function, meant to take the place of the > * various small search helper functions throughout the code and standardize > * the search interface. Right now, it only replaces the former __inode_info > -* in backref.c. > +* in backref.c, and the former btrfs_find_root_ref in root-tree.c. > +* > +* If a null key is passed, it returns immediately after running > +* btrfs_search_slot, leaving the path filled as it is and passing its > +* return value upward. If a real key is passed, it will set the caller's > +* path to point to the first item in the tree after its specified > +* objectid, type, and offset for which objectid and type match the input. > */ > int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, > u64 inum, u64 ioff, u8 key_type, > @@ -2480,7 +2486,7 @@ int btrfs_find_item(struct btrfs_root *fs_root, struct > btrfs_path *path, > key.offset = ioff; > > ret = btrfs_search_slot(NULL, fs_root, &key, path, 0, 0); > - if (ret < 0) > + if ((ret < 0) || (found_key == NULL)) > return ret; > > eb = path->nodes[0]; > diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c > index 3911fca..c07afdf 100644 > --- a/fs/btrfs/inode.c > +++ b/fs/btrfs/inode.c > @@ -4672,9 +4672,9 @@ static int fixup_tree_root_location(struct btrfs_root > *root, > } > > err = -ENOENT; > - ret = btrfs_find_root_ref(root->fs_info->tree_root, path, > - BTRFS_I(dir)->root->root_key.objectid, > - location->objectid); > + ret = btrfs_find_item(root->fs_info->tree_root, path, > + BTRFS_I(dir)->root->root_key.objectid, > + location->objectid, BTRFS_ROOT_REF_KEY, NULL); > if (ret) { > if (ret < 0) > err = ret; > diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c > index ec71ea4..fcc10eb 100644 > --- a/fs/btrfs/root-tree.c > +++ b/fs/btrfs/root-tree.c > @@ -400,21 +400,6 @@ out: > return err; > } > > -int btrfs_find_root_ref(struct btrfs_root *tree_root, > - struct btrfs_path *path, > - u64 root_id, u64 ref_id) > -{ > - struct btrfs_key key; > - int ret; > - > - key.objectid = root_id; > - key.type = BTRFS_ROOT_REF_KEY; > - key.offset = ref_id; > - > - ret = btrfs_search_slot(NULL, tree_root, &key, path, 0, 0); > - return ret; > -} > - > /* > * add a btrfs_root_ref item. type is either BTRFS_ROOT_REF_KEY > * or BTRFS_ROOT_BACKREF_KEY. > -- > 1.8.1.2 > > -- > You received this message because you are subscribed to the Google Groups > "opw-kernel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/groups/opt_out. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
