On Fri, Dec 08, 2017 at 05:06:25PM +0200, Nikolay Borisov wrote: > Signed-off-by: Nikolay Borisov <nbori...@suse.com> > --- > fs/btrfs/ctree.c | 32 ++++++++++++++++++++++---------- > 1 file changed, 22 insertions(+), 10 deletions(-) > > diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c > index 880f4f693263..1f001d31bda8 100644 > --- a/fs/btrfs/ctree.c > +++ b/fs/btrfs/ctree.c > @@ -2653,18 +2653,30 @@ int btrfs_find_item(struct btrfs_root *fs_root, > struct btrfs_path *path, > return 0; > } > > -/* > - * look for key in the tree. path is filled in with nodes along the way > - * if key is found, we return zero and you can find the item in the leaf > - * level of the path (level 0) > +/* btrfs_search_slot - look for a key in a tree and perform necessary
/* * ... > + * modifications to preserve tree invariants. > + * > + * @trans: Handle of transaction, used when modifying the tree > + * @p: Holds all btree nodes along the search path > + * @root: The root node of the tree > + * @key: The key we are looking for > + * @ins_len: Indicates purpose of search, for inserts it is 1, for > + * deletions it's -1. 0 for plain searches > + * @cow: boolean should CoW operations be performed. Must always be 1 > + * when modifying the tree. > + * > + * If @ins_len > 0, nodes and leaves will be split as we walk down the tree. > + * If @ins_len < 0, nodes will be merged as we walk down the tree (if > possible) > + * > + * If @key is found, 0 is returned and you can find the item in the leaf > level > + * of the path (level 0) > * > - * If the key isn't found, the path points to the slot where it should > - * be inserted, and 1 is returned. If there are other errors during the > - * search a negative error number is returned. > + * If @key isn't found, 1 is returned and the leaf level of the path (level > 0) > + * points to the slot where it should be inserted > + * be inserted, and 1 is returned. looks like some editing artifact > * > - * if ins_len > 0, nodes and leaves will be split as we walk down the > - * tree. if ins_len < 0, nodes will be merged as we walk down the tree (if > - * possible) > + * If an error is encountered while searching the tree a negative error > number > + * is returned > */ > int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root > *root, > const struct btrfs_key *key, struct btrfs_path *p, > -- > 2.7.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majord...@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
