btrfs: bootstrap generic btrfs_find_item interface
authorKelley Nielsen <kelleynnn@gmail.com>
Tue, 5 Nov 2013 03:33:33 +0000 (19:33 -0800)
committerChris Mason <clm@fb.com>
Tue, 28 Jan 2014 21:19:36 +0000 (13:19 -0800)
commite33d5c3d6d61518c7f115af6d11d3dffa230d31f
treedab8d84917d8f5c1f736324aec371fb665f33b31
parenta3df41ee377b2766a7525f9ca05207698efe4551
btrfs: bootstrap generic btrfs_find_item interface

There are many btrfs functions that manually search the tree for an
item. They all reimplement the same mechanism and differ in the
conditions that they use to find the item. __inode_info() is one such
example. Zach Brown proposed creating a new interface to take the place
of these functions.

This patch is the first step to creating the interface. A new function,
btrfs_find_item, has been added to ctree.c and prototyped in ctree.h.
It is identical to __inode_info, except that the order of the parameters
has been rearranged to more closely those of similar functions elsewhere
in the code (now, root and path come first, then the objectid, offset
and type, and the key to be filled in last). __inode_info's callers have
been set to call this new function instead, and __inode_info itself has
been removed.

Signed-off-by: Kelley Nielsen <kelleynnn@gmail.com>
Suggested-by: Zach Brown <zab@redhat.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/backref.c
fs/btrfs/ctree.c
fs/btrfs/ctree.h