From: Xiubo Li <xiubli@redhat.com>
Date: Mon, 17 Oct 2022 22:17:35 +0800
Subject: ceph: try to check caps immediately after async creating finishes
Git-commit: 68c62bee9d081cf815310b3a96e38d94fc16007d
Patch-mainline: v6.2-rc1
References: jsc#SES-1880

We should call the check_caps() again immediately after the async
creating finishes in case the MDS is waiting for caps revocation
to finish.

Link: https://tracker.ceph.com/issues/46904
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Luis Henriques <lhenriques@suse.de>
---
 fs/ceph/caps.c  | 2 ++
 fs/ceph/file.c  | 9 +++++++++
 fs/ceph/super.h | 2 ++
 3 files changed, 13 insertions(+)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 1323fa28ab01..4b159f97fe7b 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -1916,6 +1916,8 @@ void ceph_check_caps(struct ceph_inode_info *ci, int flags)
 
 	spin_lock(&ci->i_ceph_lock);
 	if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
+		ci->i_ceph_flags |= CEPH_I_ASYNC_CHECK_CAPS;
+
 		/* Don't send messages until we get async create reply */
 		spin_unlock(&ci->i_ceph_lock);
 		return;
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 4e68220bc06d..a6681b12e280 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -534,14 +534,23 @@ static void wake_async_create_waiters(struct inode *inode,
 				      struct ceph_mds_session *session)
 {
 	struct ceph_inode_info *ci = ceph_inode(inode);
+	bool check_cap = false;
 
 	spin_lock(&ci->i_ceph_lock);
 	if (ci->i_ceph_flags & CEPH_I_ASYNC_CREATE) {
 		ci->i_ceph_flags &= ~CEPH_I_ASYNC_CREATE;
 		wake_up_bit(&ci->i_ceph_flags, CEPH_ASYNC_CREATE_BIT);
+
+		if (ci->i_ceph_flags & CEPH_I_ASYNC_CHECK_CAPS) {
+			ci->i_ceph_flags &= ~CEPH_I_ASYNC_CHECK_CAPS;
+			check_cap = true;
+		}
 	}
 	ceph_kick_flushing_inode_caps(session, ci);
 	spin_unlock(&ci->i_ceph_lock);
+
+	if (check_cap)
+		ceph_check_caps(ci, CHECK_CAPS_FLUSH);
 }
 
 static void ceph_async_create_cb(struct ceph_mds_client *mdsc,
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index e8bc1d0d2614..e1bd6f487226 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -593,6 +593,8 @@ static inline struct inode *ceph_find_inode(struct super_block *sb,
 #define CEPH_ASYNC_CREATE_BIT	(12)	  /* async create in flight for this */
 #define CEPH_I_ASYNC_CREATE	(1 << CEPH_ASYNC_CREATE_BIT)
 #define CEPH_I_SHUTDOWN		(1 << 13) /* inode is no longer usable */
+#define CEPH_I_ASYNC_CHECK_CAPS	(1 << 14) /* check caps immediately after async
+					     creating finishes */
 
 /*
  * Masks of ceph inode work.