From: Sage Weil <sage@inktank.com>
Date: Mon, 5 Nov 2012 19:07:23 +0000 (-0800)
Subject: ceph: Fix i_size update race
X-Git-Tag: v3.8-rc1~21^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22cddde104d715600a4c218bf9224923208afe90;p=pandora-kernel.git

ceph: Fix i_size update race

ceph_aio_write() has an optimization that marks cap EPH_CAP_FILE_WR
dirty before data is copied to page cache and inode size is updated.
If ceph_check_caps() flushes the dirty cap before the inode size is
updated, MDS can miss the new inode size. The fix is move
ceph_{get,put}_cap_refs() into ceph_write_{begin,end}() and call
__ceph_mark_dirty_caps() after inode size is updated.

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Signed-off-by: Sage Weil <sage@inktank.com>
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