[PATCH 5.15.y 11/11] ksmbd: only v2 leases handle the directory

[Namjae Jeon <linkinjeon@kernel.org>]

[ Upstream commit 77bebd186442a7d703b796784db7495129cc3e70 ]

When smb2 leases is disable, ksmbd can send oplock break notification
and cause wait oplock break ack timeout. It may appear like hang when
accessing a directory. This patch make only v2 leases handle the
directory.

Cc: stable@vger.kernel.org
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/ksmbd/oplock.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/ksmbd/oplock.c b/fs/ksmbd/oplock.c
index 5baabcb818f0..4e444d01a3c3 100644
--- a/fs/ksmbd/oplock.c
+++ b/fs/ksmbd/oplock.c
@@ -1197,6 +1197,12 @@ int smb_grant_oplock(struct ksmbd_work *work, int req_op_level, u64 pid,
 	bool prev_op_has_lease;
 	__le32 prev_op_state = 0;
 
+	/* Only v2 leases handle the directory */
+	if (S_ISDIR(file_inode(fp->filp)->i_mode)) {
+		if (!lctx || lctx->version != 2)
+			return 0;
+	}
+
 	opinfo = alloc_opinfo(work, pid, tid);
 	if (!opinfo)
 		return -ENOMEM;
-- 
2.25.1