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cc6742b160
commit 65bb45b97b upstream.
Add 'smbd max io size' parameter to adjust smbd-direct max read/write
size.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
69 lines
1.8 KiB
C
69 lines
1.8 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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* Copyright (C) 2018, LG Electronics.
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*/
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#ifndef __KSMBD_TRANSPORT_RDMA_H__
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#define __KSMBD_TRANSPORT_RDMA_H__
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#define SMB_DIRECT_PORT 5445
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#define SMBD_DEFAULT_IOSIZE (8 * 1024 * 1024)
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#define SMBD_MIN_IOSIZE (512 * 1024)
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#define SMBD_MAX_IOSIZE (16 * 1024 * 1024)
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/* SMB DIRECT negotiation request packet [MS-SMBD] 2.2.1 */
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struct smb_direct_negotiate_req {
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__le16 min_version;
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__le16 max_version;
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__le16 reserved;
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__le16 credits_requested;
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__le32 preferred_send_size;
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__le32 max_receive_size;
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__le32 max_fragmented_size;
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} __packed;
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/* SMB DIRECT negotiation response packet [MS-SMBD] 2.2.2 */
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struct smb_direct_negotiate_resp {
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__le16 min_version;
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__le16 max_version;
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__le16 negotiated_version;
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__le16 reserved;
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__le16 credits_requested;
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__le16 credits_granted;
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__le32 status;
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__le32 max_readwrite_size;
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__le32 preferred_send_size;
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__le32 max_receive_size;
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__le32 max_fragmented_size;
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} __packed;
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#define SMB_DIRECT_RESPONSE_REQUESTED 0x0001
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/* SMB DIRECT data transfer packet with payload [MS-SMBD] 2.2.3 */
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struct smb_direct_data_transfer {
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__le16 credits_requested;
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__le16 credits_granted;
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__le16 flags;
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__le16 reserved;
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__le32 remaining_data_length;
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__le32 data_offset;
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__le32 data_length;
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__le32 padding;
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__u8 buffer[];
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} __packed;
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#ifdef CONFIG_SMB_SERVER_SMBDIRECT
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int ksmbd_rdma_init(void);
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int ksmbd_rdma_destroy(void);
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bool ksmbd_rdma_capable_netdev(struct net_device *netdev);
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void init_smbd_max_io_size(unsigned int sz);
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#else
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static inline int ksmbd_rdma_init(void) { return 0; }
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static inline int ksmbd_rdma_destroy(void) { return 0; }
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static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; }
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static inline void init_smbd_max_io_size(unsigned int sz) { }
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#endif
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#endif /* __KSMBD_TRANSPORT_RDMA_H__ */
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