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 SMBD_DEFAULT_IOSIZE (8 * 1024 * 1024) 11 #define SMBD_MIN_IOSIZE (512 * 1024) 12 #define SMBD_MAX_IOSIZE (16 * 1024 * 1024) 13 14 /* SMB DIRECT negotiation request packet [MS-SMBD] 2.2.1 */ 15 struct smb_direct_negotiate_req { 16 __le16 min_version; 17 __le16 max_version; 18 __le16 reserved; 19 __le16 credits_requested; 20 __le32 preferred_send_size; 21 __le32 max_receive_size; 22 __le32 max_fragmented_size; 23 } __packed; 24 25 /* SMB DIRECT negotiation response packet [MS-SMBD] 2.2.2 */ 26 struct smb_direct_negotiate_resp { 27 __le16 min_version; 28 __le16 max_version; 29 __le16 negotiated_version; 30 __le16 reserved; 31 __le16 credits_requested; 32 __le16 credits_granted; 33 __le32 status; 34 __le32 max_readwrite_size; 35 __le32 preferred_send_size; 36 __le32 max_receive_size; 37 __le32 max_fragmented_size; 38 } __packed; 39 40 #define SMB_DIRECT_RESPONSE_REQUESTED 0x0001 41 42 /* SMB DIRECT data transfer packet with payload [MS-SMBD] 2.2.3 */ 43 struct smb_direct_data_transfer { 44 __le16 credits_requested; 45 __le16 credits_granted; 46 __le16 flags; 47 __le16 reserved; 48 __le32 remaining_data_length; 49 __le32 data_offset; 50 __le32 data_length; 51 __le32 padding; 52 __u8 buffer[]; 53 } __packed; 54 55 #ifdef CONFIG_SMB_SERVER_SMBDIRECT 56 int ksmbd_rdma_init(void); 57 void ksmbd_rdma_destroy(void); 58 bool ksmbd_rdma_capable_netdev(struct net_device *netdev); 59 void init_smbd_max_io_size(unsigned int sz); 60 unsigned int get_smbd_max_read_write_size(void); 61 #else ksmbd_rdma_init(void)62static inline int ksmbd_rdma_init(void) { return 0; } ksmbd_rdma_destroy(void)63static inline int ksmbd_rdma_destroy(void) { return 0; } ksmbd_rdma_capable_netdev(struct net_device * netdev)64static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; } init_smbd_max_io_size(unsigned int sz)65static inline void init_smbd_max_io_size(unsigned int sz) { } get_smbd_max_read_write_size(void)66static inline unsigned int get_smbd_max_read_write_size(void) { return 0; } 67 #endif 68 69 #endif /* __KSMBD_TRANSPORT_RDMA_H__ */ 70