From: Sage Weil <sage@newdream.net>
Date: Tue, 9 Mar 2010 20:59:08 +0000 (-0800)
Subject: ceph: fix inode removal from snap realm when racing with migration
X-Git-Tag: v2.6.34-rc3~6^2~25
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b218b8a4a65bf4e304ae8690cadb9100ef029c0;p=pandora-kernel.git

ceph: fix inode removal from snap realm when racing with migration

When an inode was dropped while being migrated between two MDSs,
i_cap_exporting_issued was non-zero such that issue caps were non-zero and
__ceph_is_any_caps(ci) was true.  This prevented the inode from being
removed from the snap realm, even as it was dropped from the cache.

Fix this by dropping any residual i_snap_realm ref in destroy_inode.

Signed-off-by: Sage Weil <sage@newdream.net>
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