/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (C) 2017, Microsoft Corporation. * Copyright (C) 2018, LG Electronics. */ #ifndef __KSMBD_TRANSPORT_RDMA_H__ #define __KSMBD_TRANSPORT_RDMA_H__ #define SMBD_DEFAULT_IOSIZE (8 * 1024 * 1024) #define SMBD_MIN_IOSIZE (512 * 1024) #define SMBD_MAX_IOSIZE (16 * 1024 * 1024) /* SMB DIRECT negotiation request packet [MS-SMBD] 2.2.1 */ struct smb_direct_negotiate_req { __le16 min_version; __le16 max_version; __le16 reserved; __le16 credits_requested; __le32 preferred_send_size; __le32 max_receive_size; __le32 max_fragmented_size; } __packed; /* SMB DIRECT negotiation response packet [MS-SMBD] 2.2.2 */ struct smb_direct_negotiate_resp { __le16 min_version; __le16 max_version; __le16 negotiated_version; __le16 reserved; __le16 credits_requested; __le16 credits_granted; __le32 status; __le32 max_readwrite_size; __le32 preferred_send_size; __le32 max_receive_size; __le32 max_fragmented_size; } __packed; #define SMB_DIRECT_RESPONSE_REQUESTED 0x0001 /* SMB DIRECT data transfer packet with payload [MS-SMBD] 2.2.3 */ struct smb_direct_data_transfer { __le16 credits_requested; __le16 credits_granted; __le16 flags; __le16 reserved; __le32 remaining_data_length; __le32 data_offset; __le32 data_length; __le32 padding; __u8 buffer[]; } __packed; #ifdef CONFIG_SMB_SERVER_SMBDIRECT int ksmbd_rdma_init(void); void ksmbd_rdma_destroy(void); bool ksmbd_rdma_capable_netdev(struct net_device *netdev); void init_smbd_max_io_size(unsigned int sz); unsigned int get_smbd_max_read_write_size(void); #else static inline int ksmbd_rdma_init(void) { return 0; } static inline int ksmbd_rdma_destroy(void) { return 0; } static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; } static inline void init_smbd_max_io_size(unsigned int sz) { } static inline unsigned int get_smbd_max_read_write_size(void) { return 0; } #endif #endif /* __KSMBD_TRANSPORT_RDMA_H__ */