fs/smb/smbdirect/smbdirect.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *   Copyright (C) 2025 Stefan Metzmacher
 */

#ifndef __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__
#define __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__

#include <linux/types.h>

/* SMB-DIRECT buffer descriptor V1 structure [MS-SMBD] 2.2.3.1 */
struct smbdirect_buffer_descriptor_v1 {
	__le64 offset;
	__le32 token;
	__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 {
	__u64 flags;
#define SMBDIRECT_FLAG_PORT_RANGE_ONLY_IB ((__u64)0x1)
#define SMBDIRECT_FLAG_PORT_RANGE_ONLY_IW ((__u64)0x2)
	__u32 resolve_addr_timeout_msec;
	__u32 resolve_route_timeout_msec;
	__u32 rdma_connect_timeout_msec;
	__u32 negotiate_timeout_msec;
	__u16 initiator_depth;     /* limited to U8_MAX */
	__u16 responder_resources; /* limited to U8_MAX */
	__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 max_frmr_depth;
	__u32 keepalive_interval_msec;
	__u32 keepalive_timeout_msec;
} __packed;

#define SMBDIRECT_FLAG_PORT_RANGE_MASK ( \
		SMBDIRECT_FLAG_PORT_RANGE_ONLY_IB | \
		SMBDIRECT_FLAG_PORT_RANGE_ONLY_IW)

#endif /* __FS_SMB_COMMON_SMBDIRECT_SMBDIRECT_H__ */