linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * NVMe over Fabrics common host code.

 * Copyright (c) 2015-2016 HGST, a Western Digital Company.

 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>

#include <linux/miscdevice.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/parser.h>

#include <linux/seq_file.h>

#include "nvme.h"

#include "fabrics.h"

​

static LIST_HEAD(nvmf_transports);

static DECLARE_RWSEM(nvmf_transports_rwsem);

​

static LIST_HEAD(nvmf_hosts);

static DEFINE_MUTEX(nvmf_hosts_mutex);

​

static struct nvmf_host *nvmf_default_host;

​

static struct nvmf_host *__nvmf_host_find(const char *hostnqn)

{

    struct nvmf_host *host;

​

    list_for_each_entry(host, &nvmf_hosts, list) {

        if (!strcmp(host->nqn, hostnqn))

            return host;

    }

​

    return NULL;

}

​

static struct nvmf_host *nvmf_host_add(const char *hostnqn)

{

    struct nvmf_host *host;

​

    mutex_lock(&nvmf_hosts_mutex);

    host = __nvmf_host_find(hostnqn);

    if (host) {

        kref_get(&host->ref);

        goto out_unlock;

    }

​

    host = kmalloc(sizeof(*host), GFP_KERNEL);

    if (!host)

        goto out_unlock;

​

    kref_init(&host->ref);

    strlcpy(host->nqn, hostnqn, NVMF_NQN_SIZE);

​

    list_add_tail(&host->list, &nvmf_hosts);

out_unlock:

    mutex_unlock(&nvmf_hosts_mutex);

    return host;

}

​

static struct nvmf_host *nvmf_host_default(void)

{

    struct nvmf_host *host;

​