[PATCH 6.12 123/218] smb: smbdirect: introduce smbdirect_socket_parameters

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

6.12-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Stefan Metzmacher <metze@samba.org>

[ Upstream commit dce8047f4725d4469c0813ff50c4115fc2d0b628 ]

This is the next step in the direction of a common smbdirect layer.

Cc: Steve French <smfrench@gmail.com>
Cc: Tom Talpey <tom@talpey.com>
Cc: Long Li <longli@microsoft.com>
Cc: Namjae Jeon <linkinjeon@kernel.org>
Cc: Hyunchul Lee <hyc.lee@gmail.com>
Cc: Meetakshi Setiya <meetakshisetiyaoss@gmail.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>
Stable-dep-of: 43e7e284fc77 ("cifs: Fix the smbd_response slab to allow usercopy")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/smb/client/smbdirect.h                  |  1 +
 fs/smb/common/smbdirect/smbdirect.h        | 20 ++++++++++++++++++++
 fs/smb/common/smbdirect/smbdirect_socket.h |  2 ++
 3 files changed, 23 insertions(+)

diff --git a/fs/smb/client/smbdirect.h b/fs/smb/client/smbdirect.h
index ffc38a48b6140..4b559a4147af1 100644
--- a/fs/smb/client/smbdirect.h
+++ b/fs/smb/client/smbdirect.h
@@ -15,6 +15,7 @@
 #include <rdma/rdma_cm.h>
 #include <linux/mempool.h>
 
+#include "../common/smbdirect/smbdirect.h"
 #include "../common/smbdirect/smbdirect_socket.h"
 
 extern int rdma_readwrite_threshold;
diff --git a/fs/smb/common/smbdirect/smbdirect.h b/fs/smb/common/smbdirect/smbdirect.h
index eedbdf0d04337..b9a385344ff31 100644
--- a/fs/smb/common/smbdirect/smbdirect.h
+++ b/fs/smb/common/smbdirect/smbdirect.h
@@ -14,4 +14,24 @@ struct smbdirect_buffer_descriptor_v1 {
 	__le32 length;
 } __packed;
 
+/*
+ * Connection parameters mostly from [MS-SMBD] 3.1.1.1
+ *
+ * These are setup and negotiated at the beginning of a
+ * connection and remain constant unless explicitly changed.
+ *
+ * Some values are important for the upper layer.
+ */
+struct smbdirect_socket_parameters {
+	__u16 recv_credit_max;
+	__u16 send_credit_target;
+	__u32 max_send_size;
+	__u32 max_fragmented_send_size;
+	__u32 max_recv_size;
+	__u32 max_fragmented_recv_size;
+	__u32 max_read_write_size;
+	__u32 keepalive_interval_msec;
+	__u32 keepalive_timeout_msec;
+} __packed;
+
 #endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__ */
diff --git a/fs/smb/common/smbdirect/smbdirect_socket.h b/fs/smb/common/smbdirect/smbdirect_socket.h
index 69a55561f91ae..e5b15cc44a7ba 100644
--- a/fs/smb/common/smbdirect/smbdirect_socket.h
+++ b/fs/smb/common/smbdirect/smbdirect_socket.h
@@ -36,6 +36,8 @@ struct smbdirect_socket {
 		struct ib_qp *qp;
 		struct ib_device *dev;
 	} ib;
+
+	struct smbdirect_socket_parameters parameters;
 };
 
 #endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_SOCKET_H__ */
-- 
2.39.5