tree 58faee98894dd316c872a82e59e88307c25841a2
parent 209ae762a64397557be2bc48490fd968912e9a71
author Yan, Zheng <zyan@redhat.com> 1462280150 +0800
committer Ilya Dryomov <idryomov@gmail.com> 1464218137 +0200

ceph: don't assume frag tree splits in mds reply are sorted

The algorithm that updates i_fragtree relies on that the frag tree
splits in mds reply are of the same order of i_fragtree. This is not
true because current MDS encodes frag tree splits in ascending order
of (unsigned)frag_t. But nodes in i_fragtree are sorted according to
ceph_frag_compare().

The fix is sort the frag tree splits first, then updates i_fragtree.

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