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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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abe5b71c39
No callers checks the return value and this makes further changes easier. 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: 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>
77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2017, Microsoft Corporation.
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*
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* Author(s): Long Li <longli@microsoft.com>
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*/
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#ifndef _SMBDIRECT_H
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#define _SMBDIRECT_H
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#ifdef CONFIG_CIFS_SMB_DIRECT
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#define cifs_rdma_enabled(server) ((server)->rdma)
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#include "cifsglob.h"
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#include <rdma/ib_verbs.h>
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#include <rdma/rdma_cm.h>
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#include <linux/mempool.h>
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#include "../common/smbdirect/smbdirect.h"
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#include "../common/smbdirect/smbdirect_socket.h"
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extern int rdma_readwrite_threshold;
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extern int smbd_max_frmr_depth;
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extern int smbd_keep_alive_interval;
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extern int smbd_max_receive_size;
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extern int smbd_max_fragmented_recv_size;
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extern int smbd_max_send_size;
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extern int smbd_send_credit_target;
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extern int smbd_receive_credit_max;
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/*
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* The context for the SMBDirect transport
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* Everything related to the transport is here. It has several logical parts
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* 1. RDMA related structures
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* 2. SMBDirect connection parameters
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* 3. Memory registrations
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* 4. Receive and reassembly queues for data receive path
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* 5. mempools for allocating packets
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*/
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struct smbd_connection {
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struct smbdirect_socket socket;
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};
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/* Create a SMBDirect session */
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struct smbd_connection *smbd_get_connection(
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struct TCP_Server_Info *server, struct sockaddr *dstaddr);
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const struct smbdirect_socket_parameters *smbd_get_parameters(struct smbd_connection *conn);
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/* Reconnect SMBDirect session */
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int smbd_reconnect(struct TCP_Server_Info *server);
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/* Destroy SMBDirect session */
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void smbd_destroy(struct TCP_Server_Info *server);
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/* Interface for carrying upper layer I/O through send/recv */
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int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
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int smbd_send(struct TCP_Server_Info *server,
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int num_rqst, struct smb_rqst *rqst);
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/* Interfaces to register and deregister MR for RDMA read/write */
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struct smbdirect_mr_io *smbd_register_mr(
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struct smbd_connection *info, struct iov_iter *iter,
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bool writing, bool need_invalidate);
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void smbd_deregister_mr(struct smbdirect_mr_io *mr);
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#else
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#define cifs_rdma_enabled(server) 0
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struct smbd_connection {};
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static inline void *smbd_get_connection(
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struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
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static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
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static inline void smbd_destroy(struct TCP_Server_Info *server) {}
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static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
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static inline int smbd_send(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst) {return -1; }
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#endif
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#endif
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