From: Jeff Layton <jlayton@kernel.org>

Date: Mon, 6 Jun 2022 19:31:42 -0400

Subject: ceph: wait on async create before checking caps for syncfs

Git-commit: 8692969e9164c15474b356b9898e5b9b21a85643

Patch-mainline: v5.19-rc5

References: jsc#SES-1880

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>

Acked-by: Luis Henriques <lhenriques@suse.com>

---

 fs/ceph/caps.c | 1 +

 1 file changed, 1 insertion(+)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c

index 38c930384d41..ac8fd5e7f540 100644

--- a/fs/ceph/caps.c

+++ b/fs/ceph/caps.c

@@ -4377,6 +4377,7 @@ static void flush_dirty_session_caps(struct ceph_mds_session *s)

 		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);