1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * Copyright (C) 2017, Microsoft Corporation. 4 * Copyright (C) 2018, LG Electronics. 5 */ 6 7#ifndef __KSMBD_TRANSPORT_RDMA_H__ 8#define __KSMBD_TRANSPORT_RDMA_H__ 9 10#define SMB_DIRECT_PORT 5445 11 12/* SMB DIRECT negotiation request packet [MS-SMBD] 2.2.1 */ 13struct smb_direct_negotiate_req { 14 __le16 min_version; 15 __le16 max_version; 16 __le16 reserved; 17 __le16 credits_requested; 18 __le32 preferred_send_size; 19 __le32 max_receive_size; 20 __le32 max_fragmented_size; 21} __packed; 22 23/* SMB DIRECT negotiation response packet [MS-SMBD] 2.2.2 */ 24struct smb_direct_negotiate_resp { 25 __le16 min_version; 26 __le16 max_version; 27 __le16 negotiated_version; 28 __le16 reserved; 29 __le16 credits_requested; 30 __le16 credits_granted; 31 __le32 status; 32 __le32 max_readwrite_size; 33 __le32 preferred_send_size; 34 __le32 max_receive_size; 35 __le32 max_fragmented_size; 36} __packed; 37 38#define SMB_DIRECT_RESPONSE_REQUESTED 0x0001 39 40/* SMB DIRECT data transfer packet with payload [MS-SMBD] 2.2.3 */ 41struct smb_direct_data_transfer { 42 __le16 credits_requested; 43 __le16 credits_granted; 44 __le16 flags; 45 __le16 reserved; 46 __le32 remaining_data_length; 47 __le32 data_offset; 48 __le32 data_length; 49 __le32 padding; 50 __u8 buffer[]; 51} __packed; 52 53#ifdef CONFIG_SMB_SERVER_SMBDIRECT 54int ksmbd_rdma_init(void); 55int ksmbd_rdma_destroy(void); 56bool ksmbd_rdma_capable_netdev(struct net_device *netdev); 57#else 58static inline int ksmbd_rdma_init(void) { return 0; } 59static inline int ksmbd_rdma_destroy(void) { return 0; } 60static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; } 61#endif 62 63#endif /* __KSMBD_TRANSPORT_RDMA_H__ */ 64