[PATCH] ceph: wait on async create before checking caps for syncfs

[Jeff Layton <jlayton@kernel.org>]

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.

Fixes: fbed7045f552 (ceph: wait for async create reply before sending any cap messages)
URL: https://tracker.ceph.com/issues/55823
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/caps.c | 1 +
 1 file changed, 1 insertion(+)

I don't know if this will fix the tx queue stalls completely, but I
haven't seen one with this patch in place. I think it makes sense on its
own, either way.

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 0a48bf829671..5ecfff4b37c9 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -4389,6 +4389,7 @@ 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);
-- 
2.36.1