From: Stefan Metzmacher <metze@samba.org>
Date: Mon, 8 Sep 2025 20:22:35 +0000 (+0200)
Subject: smb: server: let smb_direct_flush_send_list() invalidate a remote key first
X-Git-Tag: v6.17.6~155
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=281f717f6548d0d8df3c87bc7c3024ec7d967de2;p=thirdparty%2Fkernel%2Fstable.git

smb: server: let smb_direct_flush_send_list() invalidate a remote key first

[ Upstream commit 1b53426334c3c942db47e0959a2527a4f815af50 ]

If we want to invalidate a remote key we should do that as soon as
possible, so do it in the first send work request.

Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: linux-cifs@vger.kernel.org
Cc: samba-technical@lists.samba.org
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c
index e1f659d3b4cf5..2363244ff5f75 100644
--- a/fs/smb/server/transport_rdma.c
+++ b/fs/smb/server/transport_rdma.c
@@ -939,12 +939,15 @@ static int smb_direct_flush_send_list(struct smb_direct_transport *t,
 			       struct smb_direct_sendmsg,
 			       list);
 
+	if (send_ctx->need_invalidate_rkey) {
+		first->wr.opcode = IB_WR_SEND_WITH_INV;
+		first->wr.ex.invalidate_rkey = send_ctx->remote_key;
+		send_ctx->need_invalidate_rkey = false;
+		send_ctx->remote_key = 0;
+	}
+
 	last->wr.send_flags = IB_SEND_SIGNALED;
 	last->wr.wr_cqe = &last->cqe;
-	if (is_last && send_ctx->need_invalidate_rkey) {
-		last->wr.opcode = IB_WR_SEND_WITH_INV;
-		last->wr.ex.invalidate_rkey = send_ctx->remote_key;
-	}
 
 	ret = smb_direct_post_send(t, &first->wr);
 	if (!ret) {