mirror of https://gitee.com/openkylin/linux.git
1775 lines
48 KiB
C
1775 lines
48 KiB
C
/*
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*
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* linux/drivers/s390/scsi/zfcp_aux.c
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*
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* FCP adapter driver for IBM eServer zSeries
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*
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* (C) Copyright IBM Corp. 2002, 2004
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*
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* Author(s): Martin Peschke <mpeschke@de.ibm.com>
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* Raimund Schroeder <raimund.schroeder@de.ibm.com>
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* Aron Zeh
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* Wolfgang Taphorn
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* Stefan Bader <stefan.bader@de.ibm.com>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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* Andreas Herrmann <aherrman@de.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#define ZFCP_AUX_REVISION "$Revision: 1.145 $"
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#include "zfcp_ext.h"
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/* accumulated log level (module parameter) */
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static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS;
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static char *device;
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/*********************** FUNCTION PROTOTYPES *********************************/
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/* written against the module interface */
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static int __init zfcp_module_init(void);
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/* FCP related */
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static void zfcp_ns_gid_pn_handler(unsigned long);
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/* miscellaneous */
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static inline int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
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static inline void zfcp_sg_list_free(struct zfcp_sg_list *);
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static inline int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
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void __user *, size_t);
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static inline int zfcp_sg_list_copy_to_user(void __user *,
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struct zfcp_sg_list *, size_t);
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static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long);
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#define ZFCP_CFDC_IOC_MAGIC 0xDD
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#define ZFCP_CFDC_IOC \
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_IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
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static struct file_operations zfcp_cfdc_fops = {
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.unlocked_ioctl = zfcp_cfdc_dev_ioctl,
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#ifdef CONFIG_COMPAT
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.compat_ioctl = zfcp_cfdc_dev_ioctl
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#endif
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};
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static struct miscdevice zfcp_cfdc_misc = {
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.minor = ZFCP_CFDC_DEV_MINOR,
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.name = ZFCP_CFDC_DEV_NAME,
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.fops = &zfcp_cfdc_fops
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};
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/*********************** KERNEL/MODULE PARAMETERS ***************************/
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/* declare driver module init/cleanup functions */
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module_init(zfcp_module_init);
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MODULE_AUTHOR("Heiko Carstens <heiko.carstens@de.ibm.com>, "
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"Andreas Herrman <aherrman@de.ibm.com>, "
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"Martin Peschke <mpeschke@de.ibm.com>, "
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"Raimund Schroeder <raimund.schroeder@de.ibm.com>, "
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"Wolfgang Taphorn <taphorn@de.ibm.com>, "
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"Aron Zeh <arzeh@de.ibm.com>, "
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"IBM Deutschland Entwicklung GmbH");
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MODULE_DESCRIPTION
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("FCP (SCSI over Fibre Channel) HBA driver for IBM eServer zSeries");
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MODULE_LICENSE("GPL");
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module_param(device, charp, 0400);
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MODULE_PARM_DESC(device, "specify initial device");
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module_param(loglevel, uint, 0400);
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MODULE_PARM_DESC(loglevel,
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"log levels, 8 nibbles: "
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"FC ERP QDIO CIO Config FSF SCSI Other, "
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"levels: 0=none 1=normal 2=devel 3=trace");
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/****************************************************************/
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/************** Functions without logging ***********************/
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/****************************************************************/
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void
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_zfcp_hex_dump(char *addr, int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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printk("%02x", addr[i]);
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if ((i % 4) == 3)
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printk(" ");
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if ((i % 32) == 31)
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printk("\n");
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}
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if (((i-1) % 32) != 31)
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printk("\n");
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}
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/****************************************************************/
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/************** Uncategorised Functions *************************/
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/****************************************************************/
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#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
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/**
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* zfcp_device_setup - setup function
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* @str: pointer to parameter string
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*
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* Parse "device=..." parameter string.
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*/
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static int __init
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zfcp_device_setup(char *devstr)
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{
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char *tmp, *str;
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size_t len;
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if (!devstr)
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return 0;
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len = strlen(devstr) + 1;
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str = (char *) kmalloc(len, GFP_KERNEL);
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if (!str)
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goto err_out;
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memcpy(str, devstr, len);
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tmp = strchr(str, ',');
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if (!tmp)
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goto err_out;
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*tmp++ = '\0';
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strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
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zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
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zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
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if (*tmp++ != ',')
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goto err_out;
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if (*tmp == '\0')
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goto err_out;
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zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
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if (*tmp != '\0')
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goto err_out;
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kfree(str);
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return 1;
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err_out:
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ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
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kfree(str);
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return 0;
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}
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static void __init
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zfcp_init_device_configure(void)
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{
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struct zfcp_adapter *adapter;
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struct zfcp_port *port;
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struct zfcp_unit *unit;
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down(&zfcp_data.config_sema);
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read_lock_irq(&zfcp_data.config_lock);
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adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid);
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if (adapter)
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zfcp_adapter_get(adapter);
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read_unlock_irq(&zfcp_data.config_lock);
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if (adapter == NULL)
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goto out_adapter;
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port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
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if (!port)
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goto out_port;
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unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
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if (!unit)
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goto out_unit;
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up(&zfcp_data.config_sema);
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ccw_device_set_online(adapter->ccw_device);
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zfcp_erp_wait(adapter);
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down(&zfcp_data.config_sema);
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zfcp_unit_put(unit);
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out_unit:
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zfcp_port_put(port);
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out_port:
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zfcp_adapter_put(adapter);
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out_adapter:
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up(&zfcp_data.config_sema);
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return;
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}
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static int __init
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zfcp_module_init(void)
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{
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int retval = 0;
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atomic_set(&zfcp_data.loglevel, loglevel);
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/* initialize adapter list */
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INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
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/* initialize adapters to be removed list head */
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INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh);
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zfcp_transport_template = fc_attach_transport(&zfcp_transport_functions);
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if (!zfcp_transport_template)
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return -ENODEV;
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retval = misc_register(&zfcp_cfdc_misc);
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if (retval != 0) {
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ZFCP_LOG_INFO("registration of misc device "
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"zfcp_cfdc failed\n");
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goto out;
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}
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ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
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ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor);
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/* Initialise proc semaphores */
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sema_init(&zfcp_data.config_sema, 1);
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/* initialise configuration rw lock */
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rwlock_init(&zfcp_data.config_lock);
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/* save address of data structure managing the driver module */
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zfcp_data.scsi_host_template.module = THIS_MODULE;
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/* setup dynamic I/O */
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retval = zfcp_ccw_register();
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if (retval) {
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ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
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goto out_ccw_register;
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}
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if (zfcp_device_setup(device))
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zfcp_init_device_configure();
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goto out;
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out_ccw_register:
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misc_deregister(&zfcp_cfdc_misc);
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out:
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return retval;
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}
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/*
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* function: zfcp_cfdc_dev_ioctl
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*
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* purpose: Handle control file upload/download transaction via IOCTL
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* interface
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*
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* returns: 0 - Operation completed successfuly
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* -ENOTTY - Unknown IOCTL command
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* -EINVAL - Invalid sense data record
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* -ENXIO - The FCP adapter is not available
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* -EOPNOTSUPP - The FCP adapter does not have CFDC support
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* -ENOMEM - Insufficient memory
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* -EFAULT - User space memory I/O operation fault
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* -EPERM - Cannot create or queue FSF request or create SBALs
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* -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS)
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*/
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static long
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zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
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unsigned long buffer)
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{
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struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user;
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struct zfcp_adapter *adapter = NULL;
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struct zfcp_fsf_req *fsf_req = NULL;
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struct zfcp_sg_list *sg_list = NULL;
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u32 fsf_command, option;
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char *bus_id = NULL;
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int retval = 0;
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sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
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if (sense_data == NULL) {
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retval = -ENOMEM;
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goto out;
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}
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sg_list = kmalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
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if (sg_list == NULL) {
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retval = -ENOMEM;
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goto out;
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}
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memset(sg_list, 0, sizeof(*sg_list));
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if (command != ZFCP_CFDC_IOC) {
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ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
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retval = -ENOTTY;
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goto out;
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}
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if ((sense_data_user = (void __user *) buffer) == NULL) {
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ZFCP_LOG_INFO("sense data record is required\n");
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retval = -EINVAL;
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goto out;
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}
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retval = copy_from_user(sense_data, sense_data_user,
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sizeof(struct zfcp_cfdc_sense_data));
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if (retval) {
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retval = -EFAULT;
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goto out;
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}
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if (sense_data->signature != ZFCP_CFDC_SIGNATURE) {
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ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
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ZFCP_CFDC_SIGNATURE);
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retval = -EINVAL;
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goto out;
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}
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switch (sense_data->command) {
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case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
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fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
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option = FSF_CFDC_OPTION_NORMAL_MODE;
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break;
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case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
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fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
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option = FSF_CFDC_OPTION_FORCE;
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break;
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case ZFCP_CFDC_CMND_FULL_ACCESS:
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fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
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option = FSF_CFDC_OPTION_FULL_ACCESS;
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break;
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case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
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fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
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option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
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break;
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case ZFCP_CFDC_CMND_UPLOAD:
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fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE;
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option = 0;
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break;
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default:
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ZFCP_LOG_INFO("invalid command code 0x%08x\n",
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sense_data->command);
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retval = -EINVAL;
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goto out;
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}
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bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
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if (bus_id == NULL) {
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retval = -ENOMEM;
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goto out;
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}
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snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x",
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(sense_data->devno >> 24),
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(sense_data->devno >> 16) & 0xFF,
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(sense_data->devno & 0xFFFF));
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read_lock_irq(&zfcp_data.config_lock);
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adapter = zfcp_get_adapter_by_busid(bus_id);
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if (adapter)
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zfcp_adapter_get(adapter);
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read_unlock_irq(&zfcp_data.config_lock);
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kfree(bus_id);
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|
|
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if (adapter == NULL) {
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ZFCP_LOG_INFO("invalid adapter\n");
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retval = -ENXIO;
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goto out;
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}
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|
|
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if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) {
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retval = zfcp_sg_list_alloc(sg_list,
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ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
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if (retval) {
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retval = -ENOMEM;
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goto out;
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}
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}
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|
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if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) &&
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(sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) {
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retval = zfcp_sg_list_copy_from_user(
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sg_list, &sense_data_user->control_file,
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ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
|
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if (retval) {
|
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retval = -EFAULT;
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goto out;
|
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}
|
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}
|
|
|
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retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command,
|
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option, sg_list);
|
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if (retval)
|
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goto out;
|
|
|
|
if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
|
|
(fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
|
|
retval = -ENXIO;
|
|
goto out;
|
|
}
|
|
|
|
sense_data->fsf_status = fsf_req->qtcb->header.fsf_status;
|
|
memcpy(&sense_data->fsf_status_qual,
|
|
&fsf_req->qtcb->header.fsf_status_qual,
|
|
sizeof(union fsf_status_qual));
|
|
memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256);
|
|
|
|
retval = copy_to_user(sense_data_user, sense_data,
|
|
sizeof(struct zfcp_cfdc_sense_data));
|
|
if (retval) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
if (sense_data->command & ZFCP_CFDC_UPLOAD) {
|
|
retval = zfcp_sg_list_copy_to_user(
|
|
&sense_data_user->control_file, sg_list,
|
|
ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
|
|
if (retval) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (fsf_req != NULL)
|
|
zfcp_fsf_req_free(fsf_req);
|
|
|
|
if ((adapter != NULL) && (retval != -ENXIO))
|
|
zfcp_adapter_put(adapter);
|
|
|
|
if (sg_list != NULL) {
|
|
zfcp_sg_list_free(sg_list);
|
|
kfree(sg_list);
|
|
}
|
|
|
|
if (sense_data != NULL)
|
|
kfree(sense_data);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
/**
|
|
* zfcp_sg_list_alloc - create a scatter-gather list of the specified size
|
|
* @sg_list: structure describing a scatter gather list
|
|
* @size: size of scatter-gather list
|
|
* Return: 0 on success, else -ENOMEM
|
|
*
|
|
* In sg_list->sg a pointer to the created scatter-gather list is returned,
|
|
* or NULL if we run out of memory. sg_list->count specifies the number of
|
|
* elements of the scatter-gather list. The maximum size of a single element
|
|
* in the scatter-gather list is PAGE_SIZE.
|
|
*/
|
|
static inline int
|
|
zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size)
|
|
{
|
|
struct scatterlist *sg;
|
|
unsigned int i;
|
|
int retval = 0;
|
|
void *address;
|
|
|
|
BUG_ON(sg_list == NULL);
|
|
|
|
sg_list->count = size >> PAGE_SHIFT;
|
|
if (size & ~PAGE_MASK)
|
|
sg_list->count++;
|
|
sg_list->sg = kmalloc(sg_list->count * sizeof(struct scatterlist),
|
|
GFP_KERNEL);
|
|
if (sg_list->sg == NULL) {
|
|
sg_list->count = 0;
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
memset(sg_list->sg, 0, sg_list->count * sizeof(struct scatterlist));
|
|
|
|
for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) {
|
|
sg->length = min(size, PAGE_SIZE);
|
|
sg->offset = 0;
|
|
address = (void *) get_zeroed_page(GFP_KERNEL);
|
|
if (address == NULL) {
|
|
sg_list->count = i;
|
|
zfcp_sg_list_free(sg_list);
|
|
retval = -ENOMEM;
|
|
goto out;
|
|
}
|
|
zfcp_address_to_sg(address, sg);
|
|
size -= sg->length;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/**
|
|
* zfcp_sg_list_free - free memory of a scatter-gather list
|
|
* @sg_list: structure describing a scatter-gather list
|
|
*
|
|
* Memory for each element in the scatter-gather list is freed.
|
|
* Finally sg_list->sg is freed itself and sg_list->count is reset.
|
|
*/
|
|
static inline void
|
|
zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
|
|
{
|
|
struct scatterlist *sg;
|
|
unsigned int i;
|
|
|
|
BUG_ON(sg_list == NULL);
|
|
|
|
for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
|
|
free_page((unsigned long) zfcp_sg_to_address(sg));
|
|
|
|
sg_list->count = 0;
|
|
kfree(sg_list->sg);
|
|
}
|
|
|
|
/**
|
|
* zfcp_sg_size - determine size of a scatter-gather list
|
|
* @sg: array of (struct scatterlist)
|
|
* @sg_count: elements in array
|
|
* Return: size of entire scatter-gather list
|
|
*/
|
|
size_t
|
|
zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
|
|
{
|
|
unsigned int i;
|
|
struct scatterlist *p;
|
|
size_t size;
|
|
|
|
size = 0;
|
|
for (i = 0, p = sg; i < sg_count; i++, p++) {
|
|
BUG_ON(p == NULL);
|
|
size += p->length;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
|
|
/**
|
|
* zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
|
|
* @sg_list: structure describing a scatter-gather list
|
|
* @user_buffer: pointer to buffer in user space
|
|
* @size: number of bytes to be copied
|
|
* Return: 0 on success, -EFAULT if copy_from_user fails.
|
|
*/
|
|
static inline int
|
|
zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
|
|
void __user *user_buffer,
|
|
size_t size)
|
|
{
|
|
struct scatterlist *sg;
|
|
unsigned int length;
|
|
void *zfcp_buffer;
|
|
int retval = 0;
|
|
|
|
BUG_ON(sg_list == NULL);
|
|
|
|
if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
|
|
return -EFAULT;
|
|
|
|
for (sg = sg_list->sg; size > 0; sg++) {
|
|
length = min((unsigned int)size, sg->length);
|
|
zfcp_buffer = zfcp_sg_to_address(sg);
|
|
if (copy_from_user(zfcp_buffer, user_buffer, length)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
user_buffer += length;
|
|
size -= length;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
|
|
/**
|
|
* zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
|
|
* @user_buffer: pointer to buffer in user space
|
|
* @sg_list: structure describing a scatter-gather list
|
|
* @size: number of bytes to be copied
|
|
* Return: 0 on success, -EFAULT if copy_to_user fails
|
|
*/
|
|
static inline int
|
|
zfcp_sg_list_copy_to_user(void __user *user_buffer,
|
|
struct zfcp_sg_list *sg_list,
|
|
size_t size)
|
|
{
|
|
struct scatterlist *sg;
|
|
unsigned int length;
|
|
void *zfcp_buffer;
|
|
int retval = 0;
|
|
|
|
BUG_ON(sg_list == NULL);
|
|
|
|
if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
|
|
return -EFAULT;
|
|
|
|
for (sg = sg_list->sg; size > 0; sg++) {
|
|
length = min((unsigned int) size, sg->length);
|
|
zfcp_buffer = zfcp_sg_to_address(sg);
|
|
if (copy_to_user(user_buffer, zfcp_buffer, length)) {
|
|
retval = -EFAULT;
|
|
goto out;
|
|
}
|
|
user_buffer += length;
|
|
size -= length;
|
|
}
|
|
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
|
|
#undef ZFCP_LOG_AREA
|
|
|
|
/****************************************************************/
|
|
/****** Functions for configuration/set-up of structures ********/
|
|
/****************************************************************/
|
|
|
|
#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
|
|
|
|
/**
|
|
* zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
|
|
* @port: pointer to port to search for unit
|
|
* @fcp_lun: FCP LUN to search for
|
|
* Traverse list of all units of a port and return pointer to a unit
|
|
* with the given FCP LUN.
|
|
*/
|
|
struct zfcp_unit *
|
|
zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
|
|
{
|
|
struct zfcp_unit *unit;
|
|
int found = 0;
|
|
|
|
list_for_each_entry(unit, &port->unit_list_head, list) {
|
|
if ((unit->fcp_lun == fcp_lun) &&
|
|
!atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status))
|
|
{
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
return found ? unit : NULL;
|
|
}
|
|
|
|
/**
|
|
* zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
|
|
* @adapter: pointer to adapter to search for port
|
|
* @wwpn: wwpn to search for
|
|
* Traverse list of all ports of an adapter and return pointer to a port
|
|
* with the given wwpn.
|
|
*/
|
|
struct zfcp_port *
|
|
zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
|
|
{
|
|
struct zfcp_port *port;
|
|
int found = 0;
|
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
if ((port->wwpn == wwpn) &&
|
|
!(atomic_read(&port->status) &
|
|
(ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
return found ? port : NULL;
|
|
}
|
|
|
|
/**
|
|
* zfcp_get_port_by_did - find port in port list of adapter by d_id
|
|
* @adapter: pointer to adapter to search for port
|
|
* @d_id: d_id to search for
|
|
* Traverse list of all ports of an adapter and return pointer to a port
|
|
* with the given d_id.
|
|
*/
|
|
struct zfcp_port *
|
|
zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
|
|
{
|
|
struct zfcp_port *port;
|
|
int found = 0;
|
|
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
if ((port->d_id == d_id) &&
|
|
!atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
|
|
{
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
return found ? port : NULL;
|
|
}
|
|
|
|
/**
|
|
* zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
|
|
* @bus_id: bus_id to search for
|
|
* Traverse list of all adapters and return pointer to an adapter
|
|
* with the given bus_id.
|
|
*/
|
|
struct zfcp_adapter *
|
|
zfcp_get_adapter_by_busid(char *bus_id)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
int found = 0;
|
|
|
|
list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) {
|
|
if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter),
|
|
BUS_ID_SIZE) == 0) &&
|
|
!atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE,
|
|
&adapter->status)){
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
return found ? adapter : NULL;
|
|
}
|
|
|
|
/**
|
|
* zfcp_unit_enqueue - enqueue unit to unit list of a port.
|
|
* @port: pointer to port where unit is added
|
|
* @fcp_lun: FCP LUN of unit to be enqueued
|
|
* Return: pointer to enqueued unit on success, NULL on error
|
|
* Locks: config_sema must be held to serialize changes to the unit list
|
|
*
|
|
* Sets up some unit internal structures and creates sysfs entry.
|
|
*/
|
|
struct zfcp_unit *
|
|
zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
|
|
{
|
|
struct zfcp_unit *unit, *tmp_unit;
|
|
scsi_lun_t scsi_lun;
|
|
int found;
|
|
|
|
/*
|
|
* check that there is no unit with this FCP_LUN already in list
|
|
* and enqueue it.
|
|
* Note: Unlike for the adapter and the port, this is an error
|
|
*/
|
|
read_lock_irq(&zfcp_data.config_lock);
|
|
unit = zfcp_get_unit_by_lun(port, fcp_lun);
|
|
read_unlock_irq(&zfcp_data.config_lock);
|
|
if (unit)
|
|
return NULL;
|
|
|
|
unit = kmalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
|
|
if (!unit)
|
|
return NULL;
|
|
memset(unit, 0, sizeof (struct zfcp_unit));
|
|
|
|
/* initialise reference count stuff */
|
|
atomic_set(&unit->refcount, 0);
|
|
init_waitqueue_head(&unit->remove_wq);
|
|
|
|
unit->port = port;
|
|
unit->fcp_lun = fcp_lun;
|
|
|
|
/* setup for sysfs registration */
|
|
snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun);
|
|
unit->sysfs_device.parent = &port->sysfs_device;
|
|
unit->sysfs_device.release = zfcp_sysfs_unit_release;
|
|
dev_set_drvdata(&unit->sysfs_device, unit);
|
|
|
|
/* mark unit unusable as long as sysfs registration is not complete */
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
|
|
|
|
if (device_register(&unit->sysfs_device)) {
|
|
kfree(unit);
|
|
return NULL;
|
|
}
|
|
|
|
if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
|
|
device_unregister(&unit->sysfs_device);
|
|
return NULL;
|
|
}
|
|
|
|
zfcp_unit_get(unit);
|
|
|
|
scsi_lun = 0;
|
|
found = 0;
|
|
write_lock_irq(&zfcp_data.config_lock);
|
|
list_for_each_entry(tmp_unit, &port->unit_list_head, list) {
|
|
if (tmp_unit->scsi_lun != scsi_lun) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
scsi_lun++;
|
|
}
|
|
unit->scsi_lun = scsi_lun;
|
|
if (found)
|
|
list_add_tail(&unit->list, &tmp_unit->list);
|
|
else
|
|
list_add_tail(&unit->list, &port->unit_list_head);
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
|
|
write_unlock_irq(&zfcp_data.config_lock);
|
|
|
|
port->units++;
|
|
zfcp_port_get(port);
|
|
|
|
return unit;
|
|
}
|
|
|
|
void
|
|
zfcp_unit_dequeue(struct zfcp_unit *unit)
|
|
{
|
|
zfcp_unit_wait(unit);
|
|
write_lock_irq(&zfcp_data.config_lock);
|
|
list_del(&unit->list);
|
|
write_unlock_irq(&zfcp_data.config_lock);
|
|
unit->port->units--;
|
|
zfcp_port_put(unit->port);
|
|
zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
|
|
device_unregister(&unit->sysfs_device);
|
|
}
|
|
|
|
static void *
|
|
zfcp_mempool_alloc(unsigned int __nocast gfp_mask, void *size)
|
|
{
|
|
return kmalloc((size_t) size, gfp_mask);
|
|
}
|
|
|
|
static void
|
|
zfcp_mempool_free(void *element, void *size)
|
|
{
|
|
kfree(element);
|
|
}
|
|
|
|
/*
|
|
* Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
|
|
* commands.
|
|
* It also genrates fcp-nameserver request/response buffer and unsolicited
|
|
* status read fsf_req buffers.
|
|
*
|
|
* locks: must only be called with zfcp_data.config_sema taken
|
|
*/
|
|
static int
|
|
zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
|
|
{
|
|
adapter->pool.fsf_req_erp =
|
|
mempool_create(ZFCP_POOL_FSF_REQ_ERP_NR,
|
|
zfcp_mempool_alloc, zfcp_mempool_free, (void *)
|
|
sizeof(struct zfcp_fsf_req_pool_element));
|
|
|
|
if (NULL == adapter->pool.fsf_req_erp)
|
|
return -ENOMEM;
|
|
|
|
adapter->pool.fsf_req_scsi =
|
|
mempool_create(ZFCP_POOL_FSF_REQ_SCSI_NR,
|
|
zfcp_mempool_alloc, zfcp_mempool_free, (void *)
|
|
sizeof(struct zfcp_fsf_req_pool_element));
|
|
|
|
if (NULL == adapter->pool.fsf_req_scsi)
|
|
return -ENOMEM;
|
|
|
|
adapter->pool.fsf_req_abort =
|
|
mempool_create(ZFCP_POOL_FSF_REQ_ABORT_NR,
|
|
zfcp_mempool_alloc, zfcp_mempool_free, (void *)
|
|
sizeof(struct zfcp_fsf_req_pool_element));
|
|
|
|
if (NULL == adapter->pool.fsf_req_abort)
|
|
return -ENOMEM;
|
|
|
|
adapter->pool.fsf_req_status_read =
|
|
mempool_create(ZFCP_POOL_STATUS_READ_NR,
|
|
zfcp_mempool_alloc, zfcp_mempool_free,
|
|
(void *) sizeof(struct zfcp_fsf_req));
|
|
|
|
if (NULL == adapter->pool.fsf_req_status_read)
|
|
return -ENOMEM;
|
|
|
|
adapter->pool.data_status_read =
|
|
mempool_create(ZFCP_POOL_STATUS_READ_NR,
|
|
zfcp_mempool_alloc, zfcp_mempool_free,
|
|
(void *) sizeof(struct fsf_status_read_buffer));
|
|
|
|
if (NULL == adapter->pool.data_status_read)
|
|
return -ENOMEM;
|
|
|
|
adapter->pool.data_gid_pn =
|
|
mempool_create(ZFCP_POOL_DATA_GID_PN_NR,
|
|
zfcp_mempool_alloc, zfcp_mempool_free, (void *)
|
|
sizeof(struct zfcp_gid_pn_data));
|
|
|
|
if (NULL == adapter->pool.data_gid_pn)
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* zfcp_free_low_mem_buffers - free memory pools of an adapter
|
|
* @adapter: pointer to zfcp_adapter for which memory pools should be freed
|
|
* locking: zfcp_data.config_sema must be held
|
|
*/
|
|
static void
|
|
zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
|
|
{
|
|
if (adapter->pool.fsf_req_erp)
|
|
mempool_destroy(adapter->pool.fsf_req_erp);
|
|
if (adapter->pool.fsf_req_scsi)
|
|
mempool_destroy(adapter->pool.fsf_req_scsi);
|
|
if (adapter->pool.fsf_req_abort)
|
|
mempool_destroy(adapter->pool.fsf_req_abort);
|
|
if (adapter->pool.fsf_req_status_read)
|
|
mempool_destroy(adapter->pool.fsf_req_status_read);
|
|
if (adapter->pool.data_status_read)
|
|
mempool_destroy(adapter->pool.data_status_read);
|
|
if (adapter->pool.data_gid_pn)
|
|
mempool_destroy(adapter->pool.data_gid_pn);
|
|
}
|
|
|
|
void
|
|
zfcp_dummy_release(struct device *dev)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Enqueues an adapter at the end of the adapter list in the driver data.
|
|
* All adapter internal structures are set up.
|
|
* Proc-fs entries are also created.
|
|
*
|
|
* returns: 0 if a new adapter was successfully enqueued
|
|
* ZFCP_KNOWN if an adapter with this devno was already present
|
|
* -ENOMEM if alloc failed
|
|
* locks: config_sema must be held to serialise changes to the adapter list
|
|
*/
|
|
struct zfcp_adapter *
|
|
zfcp_adapter_enqueue(struct ccw_device *ccw_device)
|
|
{
|
|
int retval = 0;
|
|
struct zfcp_adapter *adapter;
|
|
|
|
/*
|
|
* Note: It is safe to release the list_lock, as any list changes
|
|
* are protected by the config_sema, which must be held to get here
|
|
*/
|
|
|
|
/* try to allocate new adapter data structure (zeroed) */
|
|
adapter = kmalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
|
|
if (!adapter) {
|
|
ZFCP_LOG_INFO("error: allocation of base adapter "
|
|
"structure failed\n");
|
|
goto out;
|
|
}
|
|
memset(adapter, 0, sizeof (struct zfcp_adapter));
|
|
|
|
ccw_device->handler = NULL;
|
|
|
|
/* save ccw_device pointer */
|
|
adapter->ccw_device = ccw_device;
|
|
|
|
retval = zfcp_qdio_allocate_queues(adapter);
|
|
if (retval)
|
|
goto queues_alloc_failed;
|
|
|
|
retval = zfcp_qdio_allocate(adapter);
|
|
if (retval)
|
|
goto qdio_allocate_failed;
|
|
|
|
retval = zfcp_allocate_low_mem_buffers(adapter);
|
|
if (retval) {
|
|
ZFCP_LOG_INFO("error: pool allocation failed\n");
|
|
goto failed_low_mem_buffers;
|
|
}
|
|
|
|
/* initialise reference count stuff */
|
|
atomic_set(&adapter->refcount, 0);
|
|
init_waitqueue_head(&adapter->remove_wq);
|
|
|
|
/* initialise list of ports */
|
|
INIT_LIST_HEAD(&adapter->port_list_head);
|
|
|
|
/* initialise list of ports to be removed */
|
|
INIT_LIST_HEAD(&adapter->port_remove_lh);
|
|
|
|
/* initialize list of fsf requests */
|
|
spin_lock_init(&adapter->fsf_req_list_lock);
|
|
INIT_LIST_HEAD(&adapter->fsf_req_list_head);
|
|
|
|
/* initialize abort lock */
|
|
rwlock_init(&adapter->abort_lock);
|
|
|
|
/* initialise some erp stuff */
|
|
init_waitqueue_head(&adapter->erp_thread_wqh);
|
|
init_waitqueue_head(&adapter->erp_done_wqh);
|
|
|
|
/* initialize lock of associated request queue */
|
|
rwlock_init(&adapter->request_queue.queue_lock);
|
|
|
|
/* intitialise SCSI ER timer */
|
|
init_timer(&adapter->scsi_er_timer);
|
|
|
|
/* set FC service class used per default */
|
|
adapter->fc_service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT;
|
|
|
|
sprintf(adapter->name, "%s", zfcp_get_busid_by_adapter(adapter));
|
|
ASCEBC(adapter->name, strlen(adapter->name));
|
|
|
|
/* mark adapter unusable as long as sysfs registration is not complete */
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
|
|
|
|
adapter->ccw_device = ccw_device;
|
|
dev_set_drvdata(&ccw_device->dev, adapter);
|
|
|
|
if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
|
|
goto sysfs_failed;
|
|
|
|
adapter->generic_services.parent = &adapter->ccw_device->dev;
|
|
adapter->generic_services.release = zfcp_dummy_release;
|
|
snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE,
|
|
"generic_services");
|
|
|
|
if (device_register(&adapter->generic_services))
|
|
goto generic_services_failed;
|
|
|
|
/* put allocated adapter at list tail */
|
|
write_lock_irq(&zfcp_data.config_lock);
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
|
|
list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
|
|
write_unlock_irq(&zfcp_data.config_lock);
|
|
|
|
zfcp_data.adapters++;
|
|
|
|
goto out;
|
|
|
|
generic_services_failed:
|
|
zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
|
|
sysfs_failed:
|
|
dev_set_drvdata(&ccw_device->dev, NULL);
|
|
failed_low_mem_buffers:
|
|
zfcp_free_low_mem_buffers(adapter);
|
|
if (qdio_free(ccw_device) != 0)
|
|
ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
qdio_allocate_failed:
|
|
zfcp_qdio_free_queues(adapter);
|
|
queues_alloc_failed:
|
|
kfree(adapter);
|
|
adapter = NULL;
|
|
out:
|
|
return adapter;
|
|
}
|
|
|
|
/*
|
|
* returns: 0 - struct zfcp_adapter data structure successfully removed
|
|
* !0 - struct zfcp_adapter data structure could not be removed
|
|
* (e.g. still used)
|
|
* locks: adapter list write lock is assumed to be held by caller
|
|
* adapter->fsf_req_list_lock is taken and released within this
|
|
* function and must not be held on entry
|
|
*/
|
|
void
|
|
zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
|
|
{
|
|
int retval = 0;
|
|
unsigned long flags;
|
|
|
|
device_unregister(&adapter->generic_services);
|
|
zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
|
|
dev_set_drvdata(&adapter->ccw_device->dev, NULL);
|
|
/* sanity check: no pending FSF requests */
|
|
spin_lock_irqsave(&adapter->fsf_req_list_lock, flags);
|
|
retval = !list_empty(&adapter->fsf_req_list_head);
|
|
spin_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
|
|
if (retval) {
|
|
ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
|
|
"%i requests outstanding\n",
|
|
zfcp_get_busid_by_adapter(adapter), adapter,
|
|
atomic_read(&adapter->fsf_reqs_active));
|
|
retval = -EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* remove specified adapter data structure from list */
|
|
write_lock_irq(&zfcp_data.config_lock);
|
|
list_del(&adapter->list);
|
|
write_unlock_irq(&zfcp_data.config_lock);
|
|
|
|
/* decrease number of adapters in list */
|
|
zfcp_data.adapters--;
|
|
|
|
ZFCP_LOG_TRACE("adapter %s (%p) removed from list, "
|
|
"%i adapters still in list\n",
|
|
zfcp_get_busid_by_adapter(adapter),
|
|
adapter, zfcp_data.adapters);
|
|
|
|
retval = qdio_free(adapter->ccw_device);
|
|
if (retval)
|
|
ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
|
|
zfcp_free_low_mem_buffers(adapter);
|
|
/* free memory of adapter data structure and queues */
|
|
zfcp_qdio_free_queues(adapter);
|
|
ZFCP_LOG_TRACE("freeing adapter structure\n");
|
|
kfree(adapter);
|
|
out:
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* zfcp_port_enqueue - enqueue port to port list of adapter
|
|
* @adapter: adapter where remote port is added
|
|
* @wwpn: WWPN of the remote port to be enqueued
|
|
* @status: initial status for the port
|
|
* @d_id: destination id of the remote port to be enqueued
|
|
* Return: pointer to enqueued port on success, NULL on error
|
|
* Locks: config_sema must be held to serialize changes to the port list
|
|
*
|
|
* All port internal structures are set up and the sysfs entry is generated.
|
|
* d_id is used to enqueue ports with a well known address like the Directory
|
|
* Service for nameserver lookup.
|
|
*/
|
|
struct zfcp_port *
|
|
zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
|
|
u32 d_id)
|
|
{
|
|
struct zfcp_port *port;
|
|
int check_wwpn;
|
|
|
|
check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
|
|
/*
|
|
* check that there is no port with this WWPN already in list
|
|
*/
|
|
if (check_wwpn) {
|
|
read_lock_irq(&zfcp_data.config_lock);
|
|
port = zfcp_get_port_by_wwpn(adapter, wwpn);
|
|
read_unlock_irq(&zfcp_data.config_lock);
|
|
if (port)
|
|
return NULL;
|
|
}
|
|
|
|
port = kmalloc(sizeof (struct zfcp_port), GFP_KERNEL);
|
|
if (!port)
|
|
return NULL;
|
|
memset(port, 0, sizeof (struct zfcp_port));
|
|
|
|
/* initialise reference count stuff */
|
|
atomic_set(&port->refcount, 0);
|
|
init_waitqueue_head(&port->remove_wq);
|
|
|
|
INIT_LIST_HEAD(&port->unit_list_head);
|
|
INIT_LIST_HEAD(&port->unit_remove_lh);
|
|
|
|
port->adapter = adapter;
|
|
|
|
if (check_wwpn)
|
|
port->wwpn = wwpn;
|
|
|
|
atomic_set_mask(status, &port->status);
|
|
|
|
/* setup for sysfs registration */
|
|
if (status & ZFCP_STATUS_PORT_WKA) {
|
|
switch (d_id) {
|
|
case ZFCP_DID_DIRECTORY_SERVICE:
|
|
snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
|
|
"directory");
|
|
break;
|
|
case ZFCP_DID_MANAGEMENT_SERVICE:
|
|
snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
|
|
"management");
|
|
break;
|
|
case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
|
|
snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
|
|
"key_distribution");
|
|
break;
|
|
case ZFCP_DID_ALIAS_SERVICE:
|
|
snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
|
|
"alias");
|
|
break;
|
|
case ZFCP_DID_TIME_SERVICE:
|
|
snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
|
|
"time");
|
|
break;
|
|
default:
|
|
kfree(port);
|
|
return NULL;
|
|
}
|
|
port->d_id = d_id;
|
|
port->sysfs_device.parent = &adapter->generic_services;
|
|
} else {
|
|
snprintf(port->sysfs_device.bus_id,
|
|
BUS_ID_SIZE, "0x%016llx", wwpn);
|
|
port->sysfs_device.parent = &adapter->ccw_device->dev;
|
|
}
|
|
port->sysfs_device.release = zfcp_sysfs_port_release;
|
|
dev_set_drvdata(&port->sysfs_device, port);
|
|
|
|
/* mark port unusable as long as sysfs registration is not complete */
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
|
|
|
|
if (device_register(&port->sysfs_device)) {
|
|
kfree(port);
|
|
return NULL;
|
|
}
|
|
|
|
if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
|
|
device_unregister(&port->sysfs_device);
|
|
return NULL;
|
|
}
|
|
|
|
zfcp_port_get(port);
|
|
|
|
write_lock_irq(&zfcp_data.config_lock);
|
|
list_add_tail(&port->list, &adapter->port_list_head);
|
|
atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
|
|
atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
|
|
if (d_id == ZFCP_DID_DIRECTORY_SERVICE)
|
|
if (!adapter->nameserver_port)
|
|
adapter->nameserver_port = port;
|
|
adapter->ports++;
|
|
write_unlock_irq(&zfcp_data.config_lock);
|
|
|
|
zfcp_adapter_get(adapter);
|
|
|
|
return port;
|
|
}
|
|
|
|
void
|
|
zfcp_port_dequeue(struct zfcp_port *port)
|
|
{
|
|
zfcp_port_wait(port);
|
|
write_lock_irq(&zfcp_data.config_lock);
|
|
list_del(&port->list);
|
|
port->adapter->ports--;
|
|
write_unlock_irq(&zfcp_data.config_lock);
|
|
if (port->rport)
|
|
fc_remote_port_delete(port->rport);
|
|
port->rport = NULL;
|
|
zfcp_adapter_put(port->adapter);
|
|
zfcp_sysfs_port_remove_files(&port->sysfs_device,
|
|
atomic_read(&port->status));
|
|
device_unregister(&port->sysfs_device);
|
|
}
|
|
|
|
/* Enqueues a nameserver port */
|
|
int
|
|
zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
|
|
{
|
|
struct zfcp_port *port;
|
|
|
|
port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
|
|
ZFCP_DID_DIRECTORY_SERVICE);
|
|
if (!port) {
|
|
ZFCP_LOG_INFO("error: enqueue of nameserver port for "
|
|
"adapter %s failed\n",
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
return -ENXIO;
|
|
}
|
|
zfcp_port_put(port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#undef ZFCP_LOG_AREA
|
|
|
|
/****************************************************************/
|
|
/******* Fibre Channel Standard related Functions **************/
|
|
/****************************************************************/
|
|
|
|
#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
|
|
|
|
void
|
|
zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter,
|
|
struct fsf_status_read_buffer *status_buffer)
|
|
{
|
|
struct fcp_rscn_head *fcp_rscn_head;
|
|
struct fcp_rscn_element *fcp_rscn_element;
|
|
struct zfcp_port *port;
|
|
u16 i;
|
|
u16 no_entries;
|
|
u32 range_mask;
|
|
unsigned long flags;
|
|
|
|
fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
|
|
fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
|
|
|
|
/* see FC-FS */
|
|
no_entries = (fcp_rscn_head->payload_len / 4);
|
|
|
|
for (i = 1; i < no_entries; i++) {
|
|
/* skip head and start with 1st element */
|
|
fcp_rscn_element++;
|
|
switch (fcp_rscn_element->addr_format) {
|
|
case ZFCP_PORT_ADDRESS:
|
|
range_mask = ZFCP_PORTS_RANGE_PORT;
|
|
break;
|
|
case ZFCP_AREA_ADDRESS:
|
|
range_mask = ZFCP_PORTS_RANGE_AREA;
|
|
break;
|
|
case ZFCP_DOMAIN_ADDRESS:
|
|
range_mask = ZFCP_PORTS_RANGE_DOMAIN;
|
|
break;
|
|
case ZFCP_FABRIC_ADDRESS:
|
|
range_mask = ZFCP_PORTS_RANGE_FABRIC;
|
|
break;
|
|
default:
|
|
ZFCP_LOG_INFO("incoming RSCN with unknown "
|
|
"address format\n");
|
|
continue;
|
|
}
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
if (atomic_test_mask
|
|
(ZFCP_STATUS_PORT_WKA, &port->status))
|
|
continue;
|
|
/* Do we know this port? If not skip it. */
|
|
if (!atomic_test_mask
|
|
(ZFCP_STATUS_PORT_DID_DID, &port->status)) {
|
|
ZFCP_LOG_INFO("incoming RSCN, trying to open "
|
|
"port 0x%016Lx\n", port->wwpn);
|
|
zfcp_erp_port_reopen(port,
|
|
ZFCP_STATUS_COMMON_ERP_FAILED);
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* FIXME: race: d_id might being invalidated
|
|
* (...DID_DID reset)
|
|
*/
|
|
if ((port->d_id & range_mask)
|
|
== (fcp_rscn_element->nport_did & range_mask)) {
|
|
ZFCP_LOG_TRACE("reopen did 0x%08x\n",
|
|
fcp_rscn_element->nport_did);
|
|
/*
|
|
* Unfortunately, an RSCN does not specify the
|
|
* type of change a target underwent. We assume
|
|
* that it makes sense to reopen the link.
|
|
* FIXME: Shall we try to find out more about
|
|
* the target and link state before closing it?
|
|
* How to accomplish this? (nameserver?)
|
|
* Where would such code be put in?
|
|
* (inside or outside erp)
|
|
*/
|
|
ZFCP_LOG_INFO("incoming RSCN, trying to open "
|
|
"port 0x%016Lx\n", port->wwpn);
|
|
zfcp_test_link(port);
|
|
}
|
|
}
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
}
|
|
}
|
|
|
|
static void
|
|
zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter,
|
|
struct fsf_status_read_buffer *status_buffer)
|
|
{
|
|
logi *els_logi = (logi *) status_buffer->payload;
|
|
struct zfcp_port *port;
|
|
unsigned long flags;
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
if (port->wwpn == (*(wwn_t *) & els_logi->nport_wwn))
|
|
break;
|
|
}
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
if (!port || (port->wwpn != (*(wwn_t *) & els_logi->nport_wwn))) {
|
|
ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
|
|
"with d_id 0x%08x on adapter %s\n",
|
|
status_buffer->d_id,
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
} else {
|
|
zfcp_erp_port_forced_reopen(port, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter,
|
|
struct fsf_status_read_buffer *status_buffer)
|
|
{
|
|
struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
|
|
struct zfcp_port *port;
|
|
unsigned long flags;
|
|
|
|
read_lock_irqsave(&zfcp_data.config_lock, flags);
|
|
list_for_each_entry(port, &adapter->port_list_head, list) {
|
|
if (port->wwpn == els_logo->nport_wwpn)
|
|
break;
|
|
}
|
|
read_unlock_irqrestore(&zfcp_data.config_lock, flags);
|
|
|
|
if (!port || (port->wwpn != els_logo->nport_wwpn)) {
|
|
ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
|
|
"with d_id 0x%08x on adapter %s\n",
|
|
status_buffer->d_id,
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
} else {
|
|
zfcp_erp_port_forced_reopen(port, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter,
|
|
struct fsf_status_read_buffer *status_buffer)
|
|
{
|
|
ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x "
|
|
"for adapter %s\n", *(u32 *) (status_buffer->payload),
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
|
|
}
|
|
|
|
void
|
|
zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req)
|
|
{
|
|
struct fsf_status_read_buffer *status_buffer;
|
|
u32 els_type;
|
|
struct zfcp_adapter *adapter;
|
|
|
|
status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
|
|
els_type = *(u32 *) (status_buffer->payload);
|
|
adapter = fsf_req->adapter;
|
|
|
|
zfcp_san_dbf_event_incoming_els(fsf_req);
|
|
if (els_type == LS_PLOGI)
|
|
zfcp_fsf_incoming_els_plogi(adapter, status_buffer);
|
|
else if (els_type == LS_LOGO)
|
|
zfcp_fsf_incoming_els_logo(adapter, status_buffer);
|
|
else if ((els_type & 0xffff0000) == LS_RSCN)
|
|
/* we are only concerned with the command, not the length */
|
|
zfcp_fsf_incoming_els_rscn(adapter, status_buffer);
|
|
else
|
|
zfcp_fsf_incoming_els_unknown(adapter, status_buffer);
|
|
}
|
|
|
|
|
|
/**
|
|
* zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request
|
|
* @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data
|
|
* @pool: pointer to mempool_t if non-null memory pool is used for allocation
|
|
*/
|
|
static int
|
|
zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
|
|
{
|
|
struct zfcp_gid_pn_data *data;
|
|
|
|
if (pool != NULL) {
|
|
data = mempool_alloc(pool, GFP_ATOMIC);
|
|
if (likely(data != NULL)) {
|
|
data->ct.pool = pool;
|
|
}
|
|
} else {
|
|
data = kmalloc(sizeof(struct zfcp_gid_pn_data), GFP_ATOMIC);
|
|
}
|
|
|
|
if (NULL == data)
|
|
return -ENOMEM;
|
|
|
|
memset(data, 0, sizeof(*data));
|
|
data->ct.req = &data->req;
|
|
data->ct.resp = &data->resp;
|
|
data->ct.req_count = data->ct.resp_count = 1;
|
|
zfcp_address_to_sg(&data->ct_iu_req, &data->req);
|
|
zfcp_address_to_sg(&data->ct_iu_resp, &data->resp);
|
|
data->req.length = sizeof(struct ct_iu_gid_pn_req);
|
|
data->resp.length = sizeof(struct ct_iu_gid_pn_resp);
|
|
|
|
*gid_pn = data;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request
|
|
* @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed
|
|
*/
|
|
static void
|
|
zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn)
|
|
{
|
|
if ((gid_pn->ct.pool != 0))
|
|
mempool_free(gid_pn, gid_pn->ct.pool);
|
|
else
|
|
kfree(gid_pn);
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* zfcp_ns_gid_pn_request - initiate GID_PN nameserver request
|
|
* @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
|
|
*/
|
|
int
|
|
zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
|
|
{
|
|
int ret;
|
|
struct ct_iu_gid_pn_req *ct_iu_req;
|
|
struct zfcp_gid_pn_data *gid_pn;
|
|
struct zfcp_adapter *adapter = erp_action->adapter;
|
|
|
|
ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn);
|
|
if (ret < 0) {
|
|
ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver "
|
|
"request failed for adapter %s\n",
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
goto out;
|
|
}
|
|
|
|
/* setup nameserver request */
|
|
ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req);
|
|
ct_iu_req->header.revision = ZFCP_CT_REVISION;
|
|
ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
|
|
ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
|
|
ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS;
|
|
ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN;
|
|
ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE;
|
|
ct_iu_req->wwpn = erp_action->port->wwpn;
|
|
|
|
/* setup parameters for send generic command */
|
|
gid_pn->ct.port = adapter->nameserver_port;
|
|
gid_pn->ct.handler = zfcp_ns_gid_pn_handler;
|
|
gid_pn->ct.handler_data = (unsigned long) gid_pn;
|
|
gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
|
|
gid_pn->ct.timer = &erp_action->timer;
|
|
gid_pn->port = erp_action->port;
|
|
|
|
ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
|
|
erp_action);
|
|
if (ret) {
|
|
ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
|
|
"failed for adapter %s\n",
|
|
zfcp_get_busid_by_adapter(adapter));
|
|
|
|
zfcp_gid_pn_buffers_free(gid_pn);
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
|
|
* @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
|
|
*/
|
|
static void zfcp_ns_gid_pn_handler(unsigned long data)
|
|
{
|
|
struct zfcp_port *port;
|
|
struct zfcp_send_ct *ct;
|
|
struct ct_iu_gid_pn_req *ct_iu_req;
|
|
struct ct_iu_gid_pn_resp *ct_iu_resp;
|
|
struct zfcp_gid_pn_data *gid_pn;
|
|
|
|
|
|
gid_pn = (struct zfcp_gid_pn_data *) data;
|
|
port = gid_pn->port;
|
|
ct = &gid_pn->ct;
|
|
ct_iu_req = zfcp_sg_to_address(ct->req);
|
|
ct_iu_resp = zfcp_sg_to_address(ct->resp);
|
|
|
|
if (ct->status != 0)
|
|
goto failed;
|
|
|
|
if (zfcp_check_ct_response(&ct_iu_resp->header)) {
|
|
/* FIXME: do we need some specific erp entry points */
|
|
atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
|
|
goto failed;
|
|
}
|
|
/* paranoia */
|
|
if (ct_iu_req->wwpn != port->wwpn) {
|
|
ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver "
|
|
"lookup does not match expected wwpn 0x%016Lx "
|
|
"for adapter %s\n", ct_iu_req->wwpn, port->wwpn,
|
|
zfcp_get_busid_by_port(port));
|
|
goto mismatch;
|
|
}
|
|
|
|
/* looks like a valid d_id */
|
|
port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
|
|
atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
|
|
ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%08x\n",
|
|
zfcp_get_busid_by_port(port), port->wwpn, port->d_id);
|
|
goto out;
|
|
|
|
mismatch:
|
|
ZFCP_LOG_DEBUG("CT IUs do not match:\n");
|
|
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req,
|
|
sizeof(struct ct_iu_gid_pn_req));
|
|
ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp,
|
|
sizeof(struct ct_iu_gid_pn_resp));
|
|
|
|
failed:
|
|
ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn "
|
|
"0x%016Lx for adapter %s\n",
|
|
port->wwpn, zfcp_get_busid_by_port(port));
|
|
out:
|
|
zfcp_gid_pn_buffers_free(gid_pn);
|
|
return;
|
|
}
|
|
|
|
/* reject CT_IU reason codes acc. to FC-GS-4 */
|
|
static const struct zfcp_rc_entry zfcp_ct_rc[] = {
|
|
{0x01, "invalid command code"},
|
|
{0x02, "invalid version level"},
|
|
{0x03, "logical error"},
|
|
{0x04, "invalid CT_IU size"},
|
|
{0x05, "logical busy"},
|
|
{0x07, "protocol error"},
|
|
{0x09, "unable to perform command request"},
|
|
{0x0b, "command not supported"},
|
|
{0x0d, "server not available"},
|
|
{0x0e, "session could not be established"},
|
|
{0xff, "vendor specific error"},
|
|
{0, NULL},
|
|
};
|
|
|
|
/* LS_RJT reason codes acc. to FC-FS */
|
|
static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = {
|
|
{0x01, "invalid LS_Command code"},
|
|
{0x03, "logical error"},
|
|
{0x05, "logical busy"},
|
|
{0x07, "protocol error"},
|
|
{0x09, "unable to perform command request"},
|
|
{0x0b, "command not supported"},
|
|
{0x0e, "command already in progress"},
|
|
{0xff, "vendor specific error"},
|
|
{0, NULL},
|
|
};
|
|
|
|
/* reject reason codes according to FC-PH/FC-FS */
|
|
static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = {
|
|
{0x01, "invalid D_ID"},
|
|
{0x02, "invalid S_ID"},
|
|
{0x03, "Nx_Port not available, temporary"},
|
|
{0x04, "Nx_Port not available, permament"},
|
|
{0x05, "class not supported"},
|
|
{0x06, "delimiter usage error"},
|
|
{0x07, "TYPE not supported"},
|
|
{0x08, "invalid Link_Control"},
|
|
{0x09, "invalid R_CTL field"},
|
|
{0x0a, "invalid F_CTL field"},
|
|
{0x0b, "invalid OX_ID"},
|
|
{0x0c, "invalid RX_ID"},
|
|
{0x0d, "invalid SEQ_ID"},
|
|
{0x0e, "invalid DF_CTL"},
|
|
{0x0f, "invalid SEQ_CNT"},
|
|
{0x10, "invalid parameter field"},
|
|
{0x11, "exchange error"},
|
|
{0x12, "protocol error"},
|
|
{0x13, "incorrect length"},
|
|
{0x14, "unsupported ACK"},
|
|
{0x15, "class of service not supported by entity at FFFFFE"},
|
|
{0x16, "login required"},
|
|
{0x17, "excessive sequences attempted"},
|
|
{0x18, "unable to establish exchange"},
|
|
{0x1a, "fabric path not available"},
|
|
{0x1b, "invalid VC_ID (class 4)"},
|
|
{0x1c, "invalid CS_CTL field"},
|
|
{0x1d, "insufficient resources for VC (class 4)"},
|
|
{0x1f, "invalid class of service"},
|
|
{0x20, "preemption request rejected"},
|
|
{0x21, "preemption not enabled"},
|
|
{0x22, "multicast error"},
|
|
{0x23, "multicast error terminate"},
|
|
{0x24, "process login required"},
|
|
{0xff, "vendor specific reject"},
|
|
{0, NULL},
|
|
};
|
|
|
|
/**
|
|
* zfcp_rc_description - return description for given reaon code
|
|
* @code: reason code
|
|
* @rc_table: table of reason codes and descriptions
|
|
*/
|
|
static inline const char *
|
|
zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
|
|
{
|
|
const char *descr = "unknown reason code";
|
|
|
|
do {
|
|
if (code == rc_table->code) {
|
|
descr = rc_table->description;
|
|
break;
|
|
}
|
|
rc_table++;
|
|
} while (rc_table->code && rc_table->description);
|
|
|
|
return descr;
|
|
}
|
|
|
|
/**
|
|
* zfcp_check_ct_response - evaluate reason code for CT_IU
|
|
* @rjt: response payload to an CT_IU request
|
|
* Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code
|
|
*/
|
|
int
|
|
zfcp_check_ct_response(struct ct_hdr *rjt)
|
|
{
|
|
if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
|
|
return 0;
|
|
|
|
if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) {
|
|
ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
|
|
"response code (0x%04hx)\n",
|
|
rjt->cmd_rsp_code);
|
|
return 1;
|
|
}
|
|
|
|
ZFCP_LOG_INFO("Generic Service command rejected\n");
|
|
ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n",
|
|
zfcp_rc_description(rjt->reason_code, zfcp_ct_rc),
|
|
(u32) rjt->reason_code, (u32) rjt->reason_code_expl,
|
|
(u32) rjt->vendor_unique);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* zfcp_print_els_rjt - print reject parameter and description for ELS reject
|
|
* @rjt_par: reject parameter acc. to FC-PH/FC-FS
|
|
* @rc_table: table of reason codes and descriptions
|
|
*/
|
|
static inline void
|
|
zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par,
|
|
const struct zfcp_rc_entry *rc_table)
|
|
{
|
|
ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n",
|
|
zfcp_rc_description(rjt_par->reason_code, rc_table),
|
|
(u32) rjt_par->action, (u32) rjt_par->reason_code,
|
|
(u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique);
|
|
}
|
|
|
|
/**
|
|
* zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject
|
|
* @sq: status qualifier word
|
|
* @rjt_par: reject parameter as described in FC-PH and FC-FS
|
|
* Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else
|
|
*/
|
|
int
|
|
zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
|
|
{
|
|
int ret = -EIO;
|
|
|
|
if (sq == FSF_IOSTAT_NPORT_RJT) {
|
|
ZFCP_LOG_INFO("ELS rejected (P_RJT)\n");
|
|
zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
|
|
/* invalid d_id */
|
|
if (rjt_par->reason_code == 0x01)
|
|
ret = -EREMCHG;
|
|
} else if (sq == FSF_IOSTAT_FABRIC_RJT) {
|
|
ZFCP_LOG_INFO("ELS rejected (F_RJT)\n");
|
|
zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
|
|
/* invalid d_id */
|
|
if (rjt_par->reason_code == 0x01)
|
|
ret = -EREMCHG;
|
|
} else if (sq == FSF_IOSTAT_LS_RJT) {
|
|
ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n");
|
|
zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc);
|
|
ret = -EREMOTEIO;
|
|
} else
|
|
ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#undef ZFCP_LOG_AREA
|