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smb: smbdirect: add smbdirect_pdu.h with protocol definitions

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[ Upstream commit 00fab6cf323fa5850e6cbe283b23e605e6e97912 ]

This is just a start moving into a common smbdirect layer.

It will be used in the next commits...

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>
This commit is contained in:
Stefan Metzmacher
2025-05-28 18:01:30 +02:00
committed by Greg Kroah-Hartman
parent 7f3ead8ebc
commit a9bb4006c4
1 changed files with 55 additions and 0 deletions
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55
fs/smb/common/smbdirect/smbdirect_pdu.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2017 Stefan Metzmacher
*/
#ifndef __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_PDU_H__
#define __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_PDU_H__
#define SMBDIRECT_V1 0x0100
/* SMBD negotiation request packet [MS-SMBD] 2.2.1 */
struct smbdirect_negotiate_req {
__le16 min_version;
__le16 max_version;
__le16 reserved;
__le16 credits_requested;
__le32 preferred_send_size;
__le32 max_receive_size;
__le32 max_fragmented_size;
} __packed;
/* SMBD negotiation response packet [MS-SMBD] 2.2.2 */
struct smbdirect_negotiate_resp {
__le16 min_version;
__le16 max_version;
__le16 negotiated_version;
__le16 reserved;
__le16 credits_requested;
__le16 credits_granted;
__le32 status;
__le32 max_readwrite_size;
__le32 preferred_send_size;
__le32 max_receive_size;
__le32 max_fragmented_size;
} __packed;
#define SMBDIRECT_DATA_MIN_HDR_SIZE 0x14
#define SMBDIRECT_DATA_OFFSET 0x18
#define SMBDIRECT_FLAG_RESPONSE_REQUESTED 0x0001
/* SMBD data transfer packet with payload [MS-SMBD] 2.2.3 */
struct smbdirect_data_transfer {
__le16 credits_requested;
__le16 credits_granted;
__le16 flags;
__le16 reserved;
__le32 remaining_data_length;
__le32 data_offset;
__le32 data_length;
__le32 padding;
__u8 buffer[];
} __packed;
#endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_PDU_H__ */