From: Stefan Metzmacher Date: Wed, 28 May 2025 16:01:30 +0000 (+0200) Subject: smb: smbdirect: add smbdirect_pdu.h with protocol definitions X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=00fab6cf323fa5850e6cbe283b23e605e6e97912;p=users%2Fdwmw2%2Flinux.git smb: smbdirect: add smbdirect_pdu.h with protocol definitions This is just a start moving into a common smbdirect layer. It will be used in the next commits... Cc: Steve French Cc: Tom Talpey Cc: Long Li Cc: Namjae Jeon Cc: Hyunchul Lee Cc: Meetakshi Setiya Cc: linux-cifs@vger.kernel.org Cc: samba-technical@lists.samba.org Signed-off-by: Stefan Metzmacher Signed-off-by: Steve French --- diff --git a/fs/smb/common/smbdirect/smbdirect_pdu.h b/fs/smb/common/smbdirect/smbdirect_pdu.h new file mode 100644 index 0000000000000..ae9fdb05ce231 --- /dev/null +++ b/fs/smb/common/smbdirect/smbdirect_pdu.h @@ -0,0 +1,55 @@ +/* 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__ */