tree a9f91bb5b241741bd3b1536c890e18aabde8bae1
parent 04303d8ad06985bed4ea4f46018fc8f55a0962a8
author Yan, Zheng <zyan@redhat.com> 1461836615 +0800
committer Ilya Dryomov <idryomov@gmail.com> 1464218133 +0200

ceph: search cache postion for dcache readdir

use binary search to find cache index that corresponds to readdir
postion.

Signed-off-by: Yan, Zheng <zyan@redhat.com>