84e009042d
Previously, the NVMe/TCP host driver did not handle the C2HTermReq PDU, instead printing "unsupported pdu type (3)" when received. This patch adds support for processing the C2HTermReq PDU, allowing the driver to print the Fatal Error Status field. Example of output: nvme nvme4: Received C2HTermReq (FES = Invalid PDU Header Field) Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Keith Busch <kbusch@kernel.org>
199 lines
4.7 KiB
C
199 lines
4.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* NVMe over Fabrics TCP protocol header.
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* Copyright (c) 2018 Lightbits Labs. All rights reserved.
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*/
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#ifndef _LINUX_NVME_TCP_H
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#define _LINUX_NVME_TCP_H
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#include <linux/nvme.h>
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#define NVME_TCP_DISC_PORT 8009
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#define NVME_TCP_ADMIN_CCSZ SZ_8K
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#define NVME_TCP_DIGEST_LENGTH 4
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#define NVME_TCP_MIN_MAXH2CDATA 4096
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#define NVME_TCP_MIN_C2HTERM_PLEN 24
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#define NVME_TCP_MAX_C2HTERM_PLEN 152
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enum nvme_tcp_pfv {
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NVME_TCP_PFV_1_0 = 0x0,
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};
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enum nvme_tcp_tls_cipher {
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NVME_TCP_TLS_CIPHER_INVALID = 0,
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NVME_TCP_TLS_CIPHER_SHA256 = 1,
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NVME_TCP_TLS_CIPHER_SHA384 = 2,
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};
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enum nvme_tcp_fatal_error_status {
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NVME_TCP_FES_INVALID_PDU_HDR = 0x01,
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NVME_TCP_FES_PDU_SEQ_ERR = 0x02,
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NVME_TCP_FES_HDR_DIGEST_ERR = 0x03,
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NVME_TCP_FES_DATA_OUT_OF_RANGE = 0x04,
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NVME_TCP_FES_R2T_LIMIT_EXCEEDED = 0x05,
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NVME_TCP_FES_DATA_LIMIT_EXCEEDED = 0x05,
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NVME_TCP_FES_UNSUPPORTED_PARAM = 0x06,
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};
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enum nvme_tcp_digest_option {
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NVME_TCP_HDR_DIGEST_ENABLE = (1 << 0),
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NVME_TCP_DATA_DIGEST_ENABLE = (1 << 1),
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};
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enum nvme_tcp_pdu_type {
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nvme_tcp_icreq = 0x0,
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nvme_tcp_icresp = 0x1,
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nvme_tcp_h2c_term = 0x2,
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nvme_tcp_c2h_term = 0x3,
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nvme_tcp_cmd = 0x4,
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nvme_tcp_rsp = 0x5,
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nvme_tcp_h2c_data = 0x6,
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nvme_tcp_c2h_data = 0x7,
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nvme_tcp_r2t = 0x9,
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};
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enum nvme_tcp_pdu_flags {
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NVME_TCP_F_HDGST = (1 << 0),
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NVME_TCP_F_DDGST = (1 << 1),
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NVME_TCP_F_DATA_LAST = (1 << 2),
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NVME_TCP_F_DATA_SUCCESS = (1 << 3),
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};
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/**
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* struct nvme_tcp_hdr - nvme tcp pdu common header
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*
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* @type: pdu type
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* @flags: pdu specific flags
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* @hlen: pdu header length
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* @pdo: pdu data offset
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* @plen: pdu wire byte length
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*/
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struct nvme_tcp_hdr {
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__u8 type;
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__u8 flags;
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__u8 hlen;
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__u8 pdo;
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__le32 plen;
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};
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/**
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* struct nvme_tcp_icreq_pdu - nvme tcp initialize connection request pdu
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*
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* @hdr: pdu generic header
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* @pfv: pdu version format
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* @hpda: host pdu data alignment (dwords, 0's based)
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* @digest: digest types enabled
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* @maxr2t: maximum r2ts per request supported
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*/
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struct nvme_tcp_icreq_pdu {
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struct nvme_tcp_hdr hdr;
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__le16 pfv;
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__u8 hpda;
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__u8 digest;
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__le32 maxr2t;
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__u8 rsvd2[112];
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};
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/**
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* struct nvme_tcp_icresp_pdu - nvme tcp initialize connection response pdu
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*
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* @hdr: pdu common header
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* @pfv: pdu version format
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* @cpda: controller pdu data alignment (dowrds, 0's based)
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* @digest: digest types enabled
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* @maxdata: maximum data capsules per r2t supported
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*/
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struct nvme_tcp_icresp_pdu {
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struct nvme_tcp_hdr hdr;
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__le16 pfv;
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__u8 cpda;
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__u8 digest;
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__le32 maxdata;
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__u8 rsvd[112];
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};
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/**
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* struct nvme_tcp_term_pdu - nvme tcp terminate connection pdu
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*
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* @hdr: pdu common header
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* @fes: fatal error status
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* @fei: fatal error information
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*/
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struct nvme_tcp_term_pdu {
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struct nvme_tcp_hdr hdr;
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__le16 fes;
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__le16 feil;
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__le16 feiu;
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__u8 rsvd[10];
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};
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/**
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* struct nvme_tcp_cmd_pdu - nvme tcp command capsule pdu
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*
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* @hdr: pdu common header
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* @cmd: nvme command
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*/
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struct nvme_tcp_cmd_pdu {
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struct nvme_tcp_hdr hdr;
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struct nvme_command cmd;
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};
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/**
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* struct nvme_tcp_rsp_pdu - nvme tcp response capsule pdu
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*
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* @hdr: pdu common header
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* @hdr: nvme-tcp generic header
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* @cqe: nvme completion queue entry
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*/
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struct nvme_tcp_rsp_pdu {
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struct nvme_tcp_hdr hdr;
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struct nvme_completion cqe;
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};
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/**
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* struct nvme_tcp_r2t_pdu - nvme tcp ready-to-transfer pdu
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*
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* @hdr: pdu common header
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* @command_id: nvme command identifier which this relates to
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* @ttag: transfer tag (controller generated)
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* @r2t_offset: offset from the start of the command data
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* @r2t_length: length the host is allowed to send
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*/
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struct nvme_tcp_r2t_pdu {
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struct nvme_tcp_hdr hdr;
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__u16 command_id;
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__u16 ttag;
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__le32 r2t_offset;
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__le32 r2t_length;
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__u8 rsvd[4];
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};
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/**
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* struct nvme_tcp_data_pdu - nvme tcp data pdu
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*
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* @hdr: pdu common header
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* @command_id: nvme command identifier which this relates to
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* @ttag: transfer tag (controller generated)
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* @data_offset: offset from the start of the command data
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* @data_length: length of the data stream
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*/
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struct nvme_tcp_data_pdu {
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struct nvme_tcp_hdr hdr;
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__u16 command_id;
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__u16 ttag;
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__le32 data_offset;
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__le32 data_length;
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__u8 rsvd[4];
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};
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union nvme_tcp_pdu {
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struct nvme_tcp_icreq_pdu icreq;
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struct nvme_tcp_icresp_pdu icresp;
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struct nvme_tcp_cmd_pdu cmd;
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struct nvme_tcp_rsp_pdu rsp;
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struct nvme_tcp_r2t_pdu r2t;
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struct nvme_tcp_data_pdu data;
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};
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#endif /* _LINUX_NVME_TCP_H */
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