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ceph: fix flush_snap logic after putting caps

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[ Upstream commit 64f36da5625f7f9853b86750eaa89d499d16a2e9 ]

A primary reason for skipping ceph_check_caps after putting the
references was to avoid the locking in ceph_check_caps during a
reconnect. __ceph_put_cap_refs can still call ceph_flush_snaps in that
case though, and that takes many of the same inconvenient locks.

Fix the logic in __ceph_put_cap_refs to skip flushing snaps when the
skip_checking_caps flag is set.

Fixes: e64f44a88465 ("ceph: skip checking caps when session reconnecting and releasing reqs")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jeff Layton 2020-12-10 13:35:46 -05:00 committed by Greg Kroah-Hartman
parent 426b8fb3d6
commit 95f432c0a3
1 changed files with 6 additions and 4 deletions
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10
fs/ceph/caps.c
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@ -3092,10 +3092,12 @@ static void __ceph_put_cap_refs(struct ceph_inode_info *ci, int had,
dout("put_cap_refs %p had %s%s%s\n", inode, ceph_cap_string(had),
last ? " last" : "", put ? " put" : "");
if (last && !skip_checking_caps)
ceph_check_caps(ci, 0, NULL);
else if (flushsnaps)
ceph_flush_snaps(ci, NULL);
if (!skip_checking_caps) {
if (last)
ceph_check_caps(ci, 0, NULL);
else if (flushsnaps)
ceph_flush_snaps(ci, NULL);
}
if (wake)
wake_up_all(&ci->i_cap_wq);
while (put-- > 0)