linux-imx

/*******************************************************************************

 * This file contains tcm implementation using v4 configfs fabric infrastructure

 * for QLogic target mode HBAs

 *

 * (c) Copyright 2010-2013 Datera, Inc.

 *

 * Author: Nicholas A. Bellinger <nab@daterainc.com>

 *

 * tcm_qla2xxx_parse_wwn() and tcm_qla2xxx_format_wwn() contains code from

 * the TCM_FC / Open-FCoE.org fabric module.

 *

 * Copyright (c) 2010 Cisco Systems, Inc

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 ****************************************************************************/

​

​

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/utsname.h>

#include <linux/vmalloc.h>

#include <linux/init.h>

#include <linux/list.h>

#include <linux/slab.h>

#include <linux/kthread.h>

#include <linux/types.h>

#include <linux/string.h>

#include <linux/configfs.h>

#include <linux/ctype.h>

#include <asm/unaligned.h>

#include <scsi/scsi.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_cmnd.h>

#include <target/target_core_base.h>

#include <target/target_core_fabric.h>

​

#include "qla_def.h"

#include "qla_target.h"

#include "tcm_qla2xxx.h"

​

static struct workqueue_struct *tcm_qla2xxx_free_wq;

​

/*

 * Parse WWN.

 * If strict, we require lower-case hex and colon separators to be sure

 * the name is the same as what would be generated by ft_format_wwn()

 * so the name and wwn are mapped one-to-one.

 */

static ssize_t tcm_qla2xxx_parse_wwn(const char *name, u64 *wwn, int strict)

{

    const char *cp;

    char c;

    u32 nibble;

    u32 byte = 0;

    u32 pos = 0;

    u32 err;

​

    *wwn = 0;

    for (cp = name; cp < &name[TCM_QLA2XXX_NAMELEN - 1]; cp++) {

        c = *cp;

        if (c == '\n' && cp[1] == '\0')

            continue;

        if (strict && pos++ == 2 && byte++ < 7) {

            pos = 0;

            if (c == ':')

                continue;

            err = 1;

            goto fail;

        }

        if (c == '\0') {

            err = 2;

            if (strict && byte != 8)

                goto fail;

            return cp - name;

        }

        err = 3;

        if (isdigit(c))

            nibble = c - '0';

        else if (isxdigit(c) && (islower(c) || !strict))

            nibble = tolower(c) - 'a' + 10;

        else

            goto fail;

        *wwn = (*wwn << 4) | nibble;