77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) 2017, Microsoft Corporation.
|
|
*
|
|
* Author(s): Long Li <longli@microsoft.com>
|
|
*/
|
|
#ifndef _SMBDIRECT_H
|
|
#define _SMBDIRECT_H
|
|
|
|
#ifdef CONFIG_CIFS_SMB_DIRECT
|
|
#define cifs_rdma_enabled(server) ((server)->rdma)
|
|
|
|
#include "cifsglob.h"
|
|
#include <rdma/ib_verbs.h>
|
|
#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;
|
|
extern int smbd_max_frmr_depth;
|
|
extern int smbd_keep_alive_interval;
|
|
extern int smbd_max_receive_size;
|
|
extern int smbd_max_fragmented_recv_size;
|
|
extern int smbd_max_send_size;
|
|
extern int smbd_send_credit_target;
|
|
extern int smbd_receive_credit_max;
|
|
|
|
/*
|
|
* The context for the SMBDirect transport
|
|
* Everything related to the transport is here. It has several logical parts
|
|
* 1. RDMA related structures
|
|
* 2. SMBDirect connection parameters
|
|
* 3. Memory registrations
|
|
* 4. Receive and reassembly queues for data receive path
|
|
* 5. mempools for allocating packets
|
|
*/
|
|
struct smbd_connection {
|
|
struct smbdirect_socket socket;
|
|
};
|
|
|
|
/* Create a SMBDirect session */
|
|
struct smbd_connection *smbd_get_connection(
|
|
struct TCP_Server_Info *server, struct sockaddr *dstaddr);
|
|
|
|
const struct smbdirect_socket_parameters *smbd_get_parameters(struct smbd_connection *conn);
|
|
|
|
/* Reconnect SMBDirect session */
|
|
int smbd_reconnect(struct TCP_Server_Info *server);
|
|
/* Destroy SMBDirect session */
|
|
void smbd_destroy(struct TCP_Server_Info *server);
|
|
|
|
/* Interface for carrying upper layer I/O through send/recv */
|
|
int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
|
|
int smbd_send(struct TCP_Server_Info *server,
|
|
int num_rqst, struct smb_rqst *rqst);
|
|
|
|
/* Interfaces to register and deregister MR for RDMA read/write */
|
|
struct smbdirect_mr_io *smbd_register_mr(
|
|
struct smbd_connection *info, struct iov_iter *iter,
|
|
bool writing, bool need_invalidate);
|
|
int smbd_deregister_mr(struct smbdirect_mr_io *mr);
|
|
|
|
#else
|
|
#define cifs_rdma_enabled(server) 0
|
|
struct smbd_connection {};
|
|
static inline void *smbd_get_connection(
|
|
struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
|
|
static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
|
|
static inline void smbd_destroy(struct TCP_Server_Info *server) {}
|
|
static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
|
|
static inline int smbd_send(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst) {return -1; }
|
|
#endif
|
|
|
|
#endif
|