cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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transport_rdma.h (1988B)

      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 */
     15struct 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 */
     26struct 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 */
     43struct 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
     56int ksmbd_rdma_init(void);
     57void ksmbd_rdma_destroy(void);
     58bool ksmbd_rdma_capable_netdev(struct net_device *netdev);
     59void init_smbd_max_io_size(unsigned int sz);
     60unsigned int get_smbd_max_read_write_size(void);
     61#else
     62static inline int ksmbd_rdma_init(void) { return 0; }
     63static inline int ksmbd_rdma_destroy(void) { return 0; }
     64static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; }
     65static inline void init_smbd_max_io_size(unsigned int sz) { }
     66static inline unsigned int get_smbd_max_read_write_size(void) { return 0; }
     67#endif
     68
     69#endif /* __KSMBD_TRANSPORT_RDMA_H__ */