linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * NVMe over Fabrics TCP host.

 * Copyright (c) 2018 Lightbits Labs. All rights reserved.

 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/err.h>

#include <linux/nvme-tcp.h>

#include <net/sock.h>

#include <net/tcp.h>

#include <linux/blk-mq.h>

#include <crypto/hash.h>

​

#include "nvme.h"

#include "fabrics.h"

​

struct nvme_tcp_queue;

​

enum nvme_tcp_send_state {

    NVME_TCP_SEND_CMD_PDU = 0,

    NVME_TCP_SEND_H2C_PDU,

    NVME_TCP_SEND_DATA,

    NVME_TCP_SEND_DDGST,

};

​

struct nvme_tcp_request {

    struct nvme_request req;

    void            *pdu;

    struct nvme_tcp_queue   *queue;

    u32         data_len;

    u32         pdu_len;

    u32         pdu_sent;

    u16         ttag;

    struct list_head    entry;

    __le32          ddgst;

​

    struct bio      *curr_bio;

    struct iov_iter     iter;

​

    /* send state */

    size_t          offset;

    size_t          data_sent;

    enum nvme_tcp_send_state state;

};

​

enum nvme_tcp_queue_flags {

    NVME_TCP_Q_ALLOCATED    = 0,

    NVME_TCP_Q_LIVE     = 1,

};

​

enum nvme_tcp_recv_state {

    NVME_TCP_RECV_PDU = 0,

    NVME_TCP_RECV_DATA,

    NVME_TCP_RECV_DDGST,

};

​

struct nvme_tcp_ctrl;

struct nvme_tcp_queue {

    struct socket       *sock;

    struct work_struct  io_work;