[PATCH 5.18 013/102] ceph: wait on async create before checking caps for syncfs

Greg Kroah-Hartman
2022-07-05T12:31:09Z

From: Jeff Layton <jlayton@kernel.org>

commit 8692969e9164c15474b356b9898e5b9b21a85643 upstream.

Currently, we'll call ceph_check_caps, but if we're still waiting
on the reply, we'll end up spinning around on the same inode in
flush_dirty_session_caps. Wait for the async create reply before
flushing caps.

Cc: stable@vger.kernel.org
URL: https://tracker.ceph.com/issues/55823
Fixes: fbed7045f552 ("ceph: wait for async create reply before sending any cap messages")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/ceph/caps.c | 1 +
1 file changed, 1 insertion(+)

--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -4358,6 +4358,7 @@ static void flush_dirty_session_caps(str
ihold(inode);
dout("flush_dirty_caps %llx.%llx\n", ceph_vinop(inode));
spin_unlock(&mdsc->cap_dirty_lock);
+ ceph_wait_on_async_create(inode);
ceph_check_caps(ci, CHECK_CAPS_FLUSH, NULL);
iput(inode);
spin_lock(&mdsc->cap_dirty_lock);