mirror of https://gitee.com/openkylin/linux.git
951 lines
26 KiB
C
951 lines
26 KiB
C
/*
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* Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Maintained at www.Open-FCoE.org
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/etherdevice.h>
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#include <linux/ctype.h>
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#include <scsi/fcoe_sysfs.h>
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#include <scsi/libfcoe.h>
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/*
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* OK to include local libfcoe.h for debug_logging, but cannot include
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* <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
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* have to include more than fcoe_sysfs.h.
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*/
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#include "libfcoe.h"
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static atomic_t ctlr_num;
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static atomic_t fcf_num;
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/*
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* fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
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* should insulate the loss of a fcf.
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*/
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static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */
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module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
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uint, S_IRUGO|S_IWUSR);
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MODULE_PARM_DESC(fcf_dev_loss_tmo,
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"Maximum number of seconds that libfcoe should"
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" insulate the loss of a fcf. Once this value is"
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" exceeded, the fcf is removed.");
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/*
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* These are used by the fcoe_*_show_function routines, they
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* are intentionally placed in the .c file as they're not intended
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* for use throughout the code.
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*/
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#define fcoe_ctlr_id(x) \
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((x)->id)
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#define fcoe_ctlr_work_q_name(x) \
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((x)->work_q_name)
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#define fcoe_ctlr_work_q(x) \
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((x)->work_q)
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#define fcoe_ctlr_devloss_work_q_name(x) \
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((x)->devloss_work_q_name)
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#define fcoe_ctlr_devloss_work_q(x) \
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((x)->devloss_work_q)
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#define fcoe_ctlr_mode(x) \
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((x)->mode)
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#define fcoe_ctlr_fcf_dev_loss_tmo(x) \
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((x)->fcf_dev_loss_tmo)
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#define fcoe_ctlr_link_fail(x) \
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((x)->lesb.lesb_link_fail)
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#define fcoe_ctlr_vlink_fail(x) \
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((x)->lesb.lesb_vlink_fail)
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#define fcoe_ctlr_miss_fka(x) \
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((x)->lesb.lesb_miss_fka)
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#define fcoe_ctlr_symb_err(x) \
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((x)->lesb.lesb_symb_err)
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#define fcoe_ctlr_err_block(x) \
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((x)->lesb.lesb_err_block)
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#define fcoe_ctlr_fcs_error(x) \
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((x)->lesb.lesb_fcs_error)
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#define fcoe_ctlr_enabled(x) \
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((x)->enabled)
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#define fcoe_fcf_state(x) \
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((x)->state)
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#define fcoe_fcf_fabric_name(x) \
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((x)->fabric_name)
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#define fcoe_fcf_switch_name(x) \
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((x)->switch_name)
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#define fcoe_fcf_fc_map(x) \
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((x)->fc_map)
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#define fcoe_fcf_vfid(x) \
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((x)->vfid)
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#define fcoe_fcf_mac(x) \
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((x)->mac)
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#define fcoe_fcf_priority(x) \
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((x)->priority)
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#define fcoe_fcf_fka_period(x) \
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((x)->fka_period)
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#define fcoe_fcf_dev_loss_tmo(x) \
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((x)->dev_loss_tmo)
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#define fcoe_fcf_selected(x) \
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((x)->selected)
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#define fcoe_fcf_vlan_id(x) \
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((x)->vlan_id)
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/*
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* dev_loss_tmo attribute
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*/
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static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
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{
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int ret;
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ret = kstrtoul(buf, 0, val);
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if (ret)
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return -EINVAL;
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/*
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* Check for overflow; dev_loss_tmo is u32
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*/
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if (*val > UINT_MAX)
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return -EINVAL;
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return 0;
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}
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static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
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unsigned long val)
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{
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if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
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(fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
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(fcf->state == FCOE_FCF_STATE_DELETED))
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return -EBUSY;
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/*
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* Check for overflow; dev_loss_tmo is u32
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*/
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if (val > UINT_MAX)
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return -EINVAL;
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fcoe_fcf_dev_loss_tmo(fcf) = val;
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return 0;
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}
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#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \
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struct device_attribute device_attr_fcoe_##_prefix##_##_name = \
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__ATTR(_name, _mode, _show, _store)
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#define fcoe_ctlr_show_function(field, format_string, sz, cast) \
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static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
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if (ctlr->f->get_fcoe_ctlr_##field) \
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ctlr->f->get_fcoe_ctlr_##field(ctlr); \
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return snprintf(buf, sz, format_string, \
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cast fcoe_ctlr_##field(ctlr)); \
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}
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#define fcoe_fcf_show_function(field, format_string, sz, cast) \
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static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
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struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \
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if (ctlr->f->get_fcoe_fcf_##field) \
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ctlr->f->get_fcoe_fcf_##field(fcf); \
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return snprintf(buf, sz, format_string, \
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cast fcoe_fcf_##field(fcf)); \
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}
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#define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
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static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
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return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
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}
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#define fcoe_fcf_private_show_function(field, format_string, sz, cast) \
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static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
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struct device_attribute *attr, \
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char *buf) \
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{ \
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
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return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
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}
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#define fcoe_ctlr_private_rd_attr(field, format_string, sz) \
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fcoe_ctlr_private_show_function(field, format_string, sz, ) \
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static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
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show_fcoe_ctlr_device_##field, NULL)
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#define fcoe_ctlr_rd_attr(field, format_string, sz) \
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fcoe_ctlr_show_function(field, format_string, sz, ) \
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static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
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show_fcoe_ctlr_device_##field, NULL)
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#define fcoe_fcf_rd_attr(field, format_string, sz) \
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fcoe_fcf_show_function(field, format_string, sz, ) \
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static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
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show_fcoe_fcf_device_##field, NULL)
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#define fcoe_fcf_private_rd_attr(field, format_string, sz) \
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fcoe_fcf_private_show_function(field, format_string, sz, ) \
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static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
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show_fcoe_fcf_device_##field, NULL)
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#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \
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fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
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static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
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show_fcoe_ctlr_device_##field, NULL)
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#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \
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fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
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static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
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show_fcoe_fcf_device_##field, NULL)
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#define fcoe_enum_name_search(title, table_type, table) \
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static const char *get_fcoe_##title##_name(enum table_type table_key) \
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{ \
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if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \
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return NULL; \
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return table[table_key]; \
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}
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static char *fip_conn_type_names[] = {
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[ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
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[ FIP_CONN_TYPE_FABRIC ] = "Fabric",
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[ FIP_CONN_TYPE_VN2VN ] = "VN2VN",
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};
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fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
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static enum fip_conn_type fcoe_parse_mode(const char *buf)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
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if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
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return i;
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}
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return FIP_CONN_TYPE_UNKNOWN;
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}
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static char *fcf_state_names[] = {
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[ FCOE_FCF_STATE_UNKNOWN ] = "Unknown",
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[ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
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[ FCOE_FCF_STATE_CONNECTED ] = "Connected",
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};
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fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
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#define FCOE_FCF_STATE_MAX_NAMELEN 50
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static ssize_t show_fcf_state(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
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const char *name;
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name = get_fcoe_fcf_state_name(fcf->state);
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if (!name)
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return -EINVAL;
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return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
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}
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static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
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#define FCOE_MAX_MODENAME_LEN 20
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static ssize_t show_ctlr_mode(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
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const char *name;
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name = get_fcoe_ctlr_mode_name(ctlr->mode);
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if (!name)
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return -EINVAL;
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return snprintf(buf, FCOE_MAX_MODENAME_LEN,
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"%s\n", name);
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}
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static ssize_t store_ctlr_mode(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
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char mode[FCOE_MAX_MODENAME_LEN + 1];
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if (count > FCOE_MAX_MODENAME_LEN)
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return -EINVAL;
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strncpy(mode, buf, count);
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if (mode[count - 1] == '\n')
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mode[count - 1] = '\0';
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else
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mode[count] = '\0';
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switch (ctlr->enabled) {
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case FCOE_CTLR_ENABLED:
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LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.");
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return -EBUSY;
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case FCOE_CTLR_DISABLED:
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if (!ctlr->f->set_fcoe_ctlr_mode) {
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LIBFCOE_SYSFS_DBG(ctlr,
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"Mode change not supported by LLD.");
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return -ENOTSUPP;
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}
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ctlr->mode = fcoe_parse_mode(mode);
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if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
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LIBFCOE_SYSFS_DBG(ctlr,
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"Unknown mode %s provided.", buf);
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return -EINVAL;
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}
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ctlr->f->set_fcoe_ctlr_mode(ctlr);
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LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.", buf);
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return count;
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case FCOE_CTLR_UNUSED:
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default:
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LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.");
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return -ENOTSUPP;
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};
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}
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static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
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show_ctlr_mode, store_ctlr_mode);
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static ssize_t store_ctlr_enabled(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
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int rc;
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switch (ctlr->enabled) {
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case FCOE_CTLR_ENABLED:
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if (*buf == '1')
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return count;
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ctlr->enabled = FCOE_CTLR_DISABLED;
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break;
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case FCOE_CTLR_DISABLED:
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if (*buf == '0')
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return count;
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ctlr->enabled = FCOE_CTLR_ENABLED;
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break;
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case FCOE_CTLR_UNUSED:
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return -ENOTSUPP;
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};
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rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
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if (rc)
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return rc;
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return count;
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}
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static char *ctlr_enabled_state_names[] = {
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[ FCOE_CTLR_ENABLED ] = "1",
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[ FCOE_CTLR_DISABLED ] = "0",
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};
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fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
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ctlr_enabled_state_names)
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#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
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static ssize_t show_ctlr_enabled_state(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
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const char *name;
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name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
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if (!name)
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return -EINVAL;
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return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
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"%s\n", name);
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}
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static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
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show_ctlr_enabled_state,
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store_ctlr_enabled);
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static ssize_t
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store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
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struct fcoe_fcf_device *fcf;
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unsigned long val;
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int rc;
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rc = fcoe_str_to_dev_loss(buf, &val);
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if (rc)
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return rc;
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fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
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mutex_lock(&ctlr->lock);
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list_for_each_entry(fcf, &ctlr->fcfs, peers)
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fcoe_fcf_set_dev_loss_tmo(fcf, val);
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mutex_unlock(&ctlr->lock);
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return count;
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}
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fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
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static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
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show_fcoe_ctlr_device_fcf_dev_loss_tmo,
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store_private_fcoe_ctlr_fcf_dev_loss_tmo);
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/* Link Error Status Block (LESB) */
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fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
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fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
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fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
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fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
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fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
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fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
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fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
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fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
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fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
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fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
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fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
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fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
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fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
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fcoe_fcf_rd_attr(selected, "%u\n", 20);
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fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
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fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
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static ssize_t
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store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
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|
unsigned long val;
|
|
int rc;
|
|
|
|
rc = fcoe_str_to_dev_loss(buf, &val);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = fcoe_fcf_set_dev_loss_tmo(fcf, val);
|
|
if (rc)
|
|
return rc;
|
|
return count;
|
|
}
|
|
static FCOE_DEVICE_ATTR(fcf, dev_loss_tmo, S_IRUGO | S_IWUSR,
|
|
show_fcoe_fcf_device_dev_loss_tmo,
|
|
store_fcoe_fcf_dev_loss_tmo);
|
|
|
|
static struct attribute *fcoe_ctlr_lesb_attrs[] = {
|
|
&device_attr_fcoe_ctlr_link_fail.attr,
|
|
&device_attr_fcoe_ctlr_vlink_fail.attr,
|
|
&device_attr_fcoe_ctlr_miss_fka.attr,
|
|
&device_attr_fcoe_ctlr_symb_err.attr,
|
|
&device_attr_fcoe_ctlr_err_block.attr,
|
|
&device_attr_fcoe_ctlr_fcs_error.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group fcoe_ctlr_lesb_attr_group = {
|
|
.name = "lesb",
|
|
.attrs = fcoe_ctlr_lesb_attrs,
|
|
};
|
|
|
|
static struct attribute *fcoe_ctlr_attrs[] = {
|
|
&device_attr_fcoe_ctlr_fcf_dev_loss_tmo.attr,
|
|
&device_attr_fcoe_ctlr_enabled.attr,
|
|
&device_attr_fcoe_ctlr_mode.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute_group fcoe_ctlr_attr_group = {
|
|
.attrs = fcoe_ctlr_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *fcoe_ctlr_attr_groups[] = {
|
|
&fcoe_ctlr_attr_group,
|
|
&fcoe_ctlr_lesb_attr_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute *fcoe_fcf_attrs[] = {
|
|
&device_attr_fcoe_fcf_fabric_name.attr,
|
|
&device_attr_fcoe_fcf_switch_name.attr,
|
|
&device_attr_fcoe_fcf_dev_loss_tmo.attr,
|
|
&device_attr_fcoe_fcf_fc_map.attr,
|
|
&device_attr_fcoe_fcf_vfid.attr,
|
|
&device_attr_fcoe_fcf_mac.attr,
|
|
&device_attr_fcoe_fcf_priority.attr,
|
|
&device_attr_fcoe_fcf_fka_period.attr,
|
|
&device_attr_fcoe_fcf_state.attr,
|
|
&device_attr_fcoe_fcf_selected.attr,
|
|
&device_attr_fcoe_fcf_vlan_id.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group fcoe_fcf_attr_group = {
|
|
.attrs = fcoe_fcf_attrs,
|
|
};
|
|
|
|
static const struct attribute_group *fcoe_fcf_attr_groups[] = {
|
|
&fcoe_fcf_attr_group,
|
|
NULL,
|
|
};
|
|
|
|
static struct bus_type fcoe_bus_type;
|
|
|
|
static int fcoe_bus_match(struct device *dev,
|
|
struct device_driver *drv)
|
|
{
|
|
if (dev->bus == &fcoe_bus_type)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_device_release() - Release the FIP ctlr memory
|
|
* @dev: Pointer to the FIP ctlr's embedded device
|
|
*
|
|
* Called when the last FIP ctlr reference is released.
|
|
*/
|
|
static void fcoe_ctlr_device_release(struct device *dev)
|
|
{
|
|
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
|
|
kfree(ctlr);
|
|
}
|
|
|
|
/**
|
|
* fcoe_fcf_device_release() - Release the FIP fcf memory
|
|
* @dev: Pointer to the fcf's embedded device
|
|
*
|
|
* Called when the last FIP fcf reference is released.
|
|
*/
|
|
static void fcoe_fcf_device_release(struct device *dev)
|
|
{
|
|
struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
|
|
kfree(fcf);
|
|
}
|
|
|
|
static struct device_type fcoe_ctlr_device_type = {
|
|
.name = "fcoe_ctlr",
|
|
.groups = fcoe_ctlr_attr_groups,
|
|
.release = fcoe_ctlr_device_release,
|
|
};
|
|
|
|
static struct device_type fcoe_fcf_device_type = {
|
|
.name = "fcoe_fcf",
|
|
.groups = fcoe_fcf_attr_groups,
|
|
.release = fcoe_fcf_device_release,
|
|
};
|
|
|
|
static struct bus_attribute fcoe_bus_attr_group[] = {
|
|
__ATTR(ctlr_create, S_IWUSR, NULL, fcoe_ctlr_create_store),
|
|
__ATTR(ctlr_destroy, S_IWUSR, NULL, fcoe_ctlr_destroy_store),
|
|
__ATTR_NULL
|
|
};
|
|
|
|
static struct bus_type fcoe_bus_type = {
|
|
.name = "fcoe",
|
|
.match = &fcoe_bus_match,
|
|
.bus_attrs = fcoe_bus_attr_group,
|
|
};
|
|
|
|
/**
|
|
* fcoe_ctlr_device_flush_work() - Flush a FIP ctlr's workqueue
|
|
* @ctlr: Pointer to the FIP ctlr whose workqueue is to be flushed
|
|
*/
|
|
static void fcoe_ctlr_device_flush_work(struct fcoe_ctlr_device *ctlr)
|
|
{
|
|
if (!fcoe_ctlr_work_q(ctlr)) {
|
|
printk(KERN_ERR
|
|
"ERROR: FIP Ctlr '%d' attempted to flush work, "
|
|
"when no workqueue created.\n", ctlr->id);
|
|
dump_stack();
|
|
return;
|
|
}
|
|
|
|
flush_workqueue(fcoe_ctlr_work_q(ctlr));
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_device_queue_work() - Schedule work for a FIP ctlr's workqueue
|
|
* @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
|
|
* @work: Work to queue for execution
|
|
*
|
|
* Return value:
|
|
* 1 on success / 0 already queued / < 0 for error
|
|
*/
|
|
static int fcoe_ctlr_device_queue_work(struct fcoe_ctlr_device *ctlr,
|
|
struct work_struct *work)
|
|
{
|
|
if (unlikely(!fcoe_ctlr_work_q(ctlr))) {
|
|
printk(KERN_ERR
|
|
"ERROR: FIP Ctlr '%d' attempted to queue work, "
|
|
"when no workqueue created.\n", ctlr->id);
|
|
dump_stack();
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
return queue_work(fcoe_ctlr_work_q(ctlr), work);
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_device_flush_devloss() - Flush a FIP ctlr's devloss workqueue
|
|
* @ctlr: Pointer to FIP ctlr whose workqueue is to be flushed
|
|
*/
|
|
static void fcoe_ctlr_device_flush_devloss(struct fcoe_ctlr_device *ctlr)
|
|
{
|
|
if (!fcoe_ctlr_devloss_work_q(ctlr)) {
|
|
printk(KERN_ERR
|
|
"ERROR: FIP Ctlr '%d' attempted to flush work, "
|
|
"when no workqueue created.\n", ctlr->id);
|
|
dump_stack();
|
|
return;
|
|
}
|
|
|
|
flush_workqueue(fcoe_ctlr_devloss_work_q(ctlr));
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_device_queue_devloss_work() - Schedule work for a FIP ctlr's devloss workqueue
|
|
* @ctlr: Pointer to the FIP ctlr who owns the devloss workqueue
|
|
* @work: Work to queue for execution
|
|
* @delay: jiffies to delay the work queuing
|
|
*
|
|
* Return value:
|
|
* 1 on success / 0 already queued / < 0 for error
|
|
*/
|
|
static int fcoe_ctlr_device_queue_devloss_work(struct fcoe_ctlr_device *ctlr,
|
|
struct delayed_work *work,
|
|
unsigned long delay)
|
|
{
|
|
if (unlikely(!fcoe_ctlr_devloss_work_q(ctlr))) {
|
|
printk(KERN_ERR
|
|
"ERROR: FIP Ctlr '%d' attempted to queue work, "
|
|
"when no workqueue created.\n", ctlr->id);
|
|
dump_stack();
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
return queue_delayed_work(fcoe_ctlr_devloss_work_q(ctlr), work, delay);
|
|
}
|
|
|
|
static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
|
|
struct fcoe_fcf_device *old)
|
|
{
|
|
if (new->switch_name == old->switch_name &&
|
|
new->fabric_name == old->fabric_name &&
|
|
new->fc_map == old->fc_map &&
|
|
compare_ether_addr(new->mac, old->mac) == 0)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fcoe_ctlr_device_add() - Add a FIP ctlr to sysfs
|
|
* @parent: The parent device to which the fcoe_ctlr instance
|
|
* should be attached
|
|
* @f: The LLD's FCoE sysfs function template pointer
|
|
* @priv_size: Size to be allocated with the fcoe_ctlr_device for the LLD
|
|
*
|
|
* This routine allocates a FIP ctlr object with some additional memory
|
|
* for the LLD. The FIP ctlr is initialized, added to sysfs and then
|
|
* attributes are added to it.
|
|
*/
|
|
struct fcoe_ctlr_device *fcoe_ctlr_device_add(struct device *parent,
|
|
struct fcoe_sysfs_function_template *f,
|
|
int priv_size)
|
|
{
|
|
struct fcoe_ctlr_device *ctlr;
|
|
int error = 0;
|
|
|
|
ctlr = kzalloc(sizeof(struct fcoe_ctlr_device) + priv_size,
|
|
GFP_KERNEL);
|
|
if (!ctlr)
|
|
goto out;
|
|
|
|
ctlr->id = atomic_inc_return(&ctlr_num) - 1;
|
|
ctlr->f = f;
|
|
ctlr->mode = FIP_CONN_TYPE_FABRIC;
|
|
INIT_LIST_HEAD(&ctlr->fcfs);
|
|
mutex_init(&ctlr->lock);
|
|
ctlr->dev.parent = parent;
|
|
ctlr->dev.bus = &fcoe_bus_type;
|
|
ctlr->dev.type = &fcoe_ctlr_device_type;
|
|
|
|
ctlr->fcf_dev_loss_tmo = fcoe_fcf_dev_loss_tmo;
|
|
|
|
snprintf(ctlr->work_q_name, sizeof(ctlr->work_q_name),
|
|
"ctlr_wq_%d", ctlr->id);
|
|
ctlr->work_q = create_singlethread_workqueue(
|
|
ctlr->work_q_name);
|
|
if (!ctlr->work_q)
|
|
goto out_del;
|
|
|
|
snprintf(ctlr->devloss_work_q_name,
|
|
sizeof(ctlr->devloss_work_q_name),
|
|
"ctlr_dl_wq_%d", ctlr->id);
|
|
ctlr->devloss_work_q = create_singlethread_workqueue(
|
|
ctlr->devloss_work_q_name);
|
|
if (!ctlr->devloss_work_q)
|
|
goto out_del_q;
|
|
|
|
dev_set_name(&ctlr->dev, "ctlr_%d", ctlr->id);
|
|
error = device_register(&ctlr->dev);
|
|
if (error)
|
|
goto out_del_q2;
|
|
|
|
return ctlr;
|
|
|
|
out_del_q2:
|
|
destroy_workqueue(ctlr->devloss_work_q);
|
|
ctlr->devloss_work_q = NULL;
|
|
out_del_q:
|
|
destroy_workqueue(ctlr->work_q);
|
|
ctlr->work_q = NULL;
|
|
out_del:
|
|
kfree(ctlr);
|
|
out:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(fcoe_ctlr_device_add);
|
|
|
|
/**
|
|
* fcoe_ctlr_device_delete() - Delete a FIP ctlr and its subtree from sysfs
|
|
* @ctlr: A pointer to the ctlr to be deleted
|
|
*
|
|
* Deletes a FIP ctlr and any fcfs attached
|
|
* to it. Deleting fcfs will cause their childen
|
|
* to be deleted as well.
|
|
*
|
|
* The ctlr is detached from sysfs and it's resources
|
|
* are freed (work q), but the memory is not freed
|
|
* until its last reference is released.
|
|
*
|
|
* This routine expects no locks to be held before
|
|
* calling.
|
|
*
|
|
* TODO: Currently there are no callbacks to clean up LLD data
|
|
* for a fcoe_fcf_device. LLDs must keep this in mind as they need
|
|
* to clean up each of their LLD data for all fcoe_fcf_device before
|
|
* calling fcoe_ctlr_device_delete.
|
|
*/
|
|
void fcoe_ctlr_device_delete(struct fcoe_ctlr_device *ctlr)
|
|
{
|
|
struct fcoe_fcf_device *fcf, *next;
|
|
/* Remove any attached fcfs */
|
|
mutex_lock(&ctlr->lock);
|
|
list_for_each_entry_safe(fcf, next,
|
|
&ctlr->fcfs, peers) {
|
|
list_del(&fcf->peers);
|
|
fcf->state = FCOE_FCF_STATE_DELETED;
|
|
fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
|
|
}
|
|
mutex_unlock(&ctlr->lock);
|
|
|
|
fcoe_ctlr_device_flush_work(ctlr);
|
|
|
|
destroy_workqueue(ctlr->devloss_work_q);
|
|
ctlr->devloss_work_q = NULL;
|
|
destroy_workqueue(ctlr->work_q);
|
|
ctlr->work_q = NULL;
|
|
|
|
device_unregister(&ctlr->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(fcoe_ctlr_device_delete);
|
|
|
|
/**
|
|
* fcoe_fcf_device_final_delete() - Final delete routine
|
|
* @work: The FIP fcf's embedded work struct
|
|
*
|
|
* It is expected that the fcf has been removed from
|
|
* the FIP ctlr's list before calling this routine.
|
|
*/
|
|
static void fcoe_fcf_device_final_delete(struct work_struct *work)
|
|
{
|
|
struct fcoe_fcf_device *fcf =
|
|
container_of(work, struct fcoe_fcf_device, delete_work);
|
|
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
|
|
|
|
/*
|
|
* Cancel any outstanding timers. These should really exist
|
|
* only when rmmod'ing the LLDD and we're asking for
|
|
* immediate termination of the rports
|
|
*/
|
|
if (!cancel_delayed_work(&fcf->dev_loss_work))
|
|
fcoe_ctlr_device_flush_devloss(ctlr);
|
|
|
|
device_unregister(&fcf->dev);
|
|
}
|
|
|
|
/**
|
|
* fip_timeout_deleted_fcf() - Delete a fcf when the devloss timer fires
|
|
* @work: The FIP fcf's embedded work struct
|
|
*
|
|
* Removes the fcf from the FIP ctlr's list of fcfs and
|
|
* queues the final deletion.
|
|
*/
|
|
static void fip_timeout_deleted_fcf(struct work_struct *work)
|
|
{
|
|
struct fcoe_fcf_device *fcf =
|
|
container_of(work, struct fcoe_fcf_device, dev_loss_work.work);
|
|
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
|
|
|
|
mutex_lock(&ctlr->lock);
|
|
|
|
/*
|
|
* If the fcf is deleted or reconnected before the timer
|
|
* fires the devloss queue will be flushed, but the state will
|
|
* either be CONNECTED or DELETED. If that is the case we
|
|
* cancel deleting the fcf.
|
|
*/
|
|
if (fcf->state != FCOE_FCF_STATE_DISCONNECTED)
|
|
goto out;
|
|
|
|
dev_printk(KERN_ERR, &fcf->dev,
|
|
"FIP fcf connection time out: removing fcf\n");
|
|
|
|
list_del(&fcf->peers);
|
|
fcf->state = FCOE_FCF_STATE_DELETED;
|
|
fcoe_ctlr_device_queue_work(ctlr, &fcf->delete_work);
|
|
|
|
out:
|
|
mutex_unlock(&ctlr->lock);
|
|
}
|
|
|
|
/**
|
|
* fcoe_fcf_device_delete() - Delete a FIP fcf
|
|
* @fcf: Pointer to the fcf which is to be deleted
|
|
*
|
|
* Queues the FIP fcf on the devloss workqueue
|
|
*
|
|
* Expects the ctlr_attrs mutex to be held for fcf
|
|
* state change.
|
|
*/
|
|
void fcoe_fcf_device_delete(struct fcoe_fcf_device *fcf)
|
|
{
|
|
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf);
|
|
int timeout = fcf->dev_loss_tmo;
|
|
|
|
if (fcf->state != FCOE_FCF_STATE_CONNECTED)
|
|
return;
|
|
|
|
fcf->state = FCOE_FCF_STATE_DISCONNECTED;
|
|
|
|
/*
|
|
* FCF will only be re-connected by the LLD calling
|
|
* fcoe_fcf_device_add, and it should be setting up
|
|
* priv then.
|
|
*/
|
|
fcf->priv = NULL;
|
|
|
|
fcoe_ctlr_device_queue_devloss_work(ctlr, &fcf->dev_loss_work,
|
|
timeout * HZ);
|
|
}
|
|
EXPORT_SYMBOL_GPL(fcoe_fcf_device_delete);
|
|
|
|
/**
|
|
* fcoe_fcf_device_add() - Add a FCoE sysfs fcoe_fcf_device to the system
|
|
* @ctlr: The fcoe_ctlr_device that will be the fcoe_fcf_device parent
|
|
* @new_fcf: A temporary FCF used for lookups on the current list of fcfs
|
|
*
|
|
* Expects to be called with the ctlr->lock held
|
|
*/
|
|
struct fcoe_fcf_device *fcoe_fcf_device_add(struct fcoe_ctlr_device *ctlr,
|
|
struct fcoe_fcf_device *new_fcf)
|
|
{
|
|
struct fcoe_fcf_device *fcf;
|
|
int error = 0;
|
|
|
|
list_for_each_entry(fcf, &ctlr->fcfs, peers) {
|
|
if (fcoe_fcf_device_match(new_fcf, fcf)) {
|
|
if (fcf->state == FCOE_FCF_STATE_CONNECTED)
|
|
return fcf;
|
|
|
|
fcf->state = FCOE_FCF_STATE_CONNECTED;
|
|
|
|
if (!cancel_delayed_work(&fcf->dev_loss_work))
|
|
fcoe_ctlr_device_flush_devloss(ctlr);
|
|
|
|
return fcf;
|
|
}
|
|
}
|
|
|
|
fcf = kzalloc(sizeof(struct fcoe_fcf_device), GFP_ATOMIC);
|
|
if (unlikely(!fcf))
|
|
goto out;
|
|
|
|
INIT_WORK(&fcf->delete_work, fcoe_fcf_device_final_delete);
|
|
INIT_DELAYED_WORK(&fcf->dev_loss_work, fip_timeout_deleted_fcf);
|
|
|
|
fcf->dev.parent = &ctlr->dev;
|
|
fcf->dev.bus = &fcoe_bus_type;
|
|
fcf->dev.type = &fcoe_fcf_device_type;
|
|
fcf->id = atomic_inc_return(&fcf_num) - 1;
|
|
fcf->state = FCOE_FCF_STATE_UNKNOWN;
|
|
|
|
fcf->dev_loss_tmo = ctlr->fcf_dev_loss_tmo;
|
|
|
|
dev_set_name(&fcf->dev, "fcf_%d", fcf->id);
|
|
|
|
fcf->fabric_name = new_fcf->fabric_name;
|
|
fcf->switch_name = new_fcf->switch_name;
|
|
fcf->fc_map = new_fcf->fc_map;
|
|
fcf->vfid = new_fcf->vfid;
|
|
memcpy(fcf->mac, new_fcf->mac, ETH_ALEN);
|
|
fcf->priority = new_fcf->priority;
|
|
fcf->fka_period = new_fcf->fka_period;
|
|
fcf->selected = new_fcf->selected;
|
|
|
|
error = device_register(&fcf->dev);
|
|
if (error)
|
|
goto out_del;
|
|
|
|
fcf->state = FCOE_FCF_STATE_CONNECTED;
|
|
list_add_tail(&fcf->peers, &ctlr->fcfs);
|
|
|
|
return fcf;
|
|
|
|
out_del:
|
|
kfree(fcf);
|
|
out:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(fcoe_fcf_device_add);
|
|
|
|
int __init fcoe_sysfs_setup(void)
|
|
{
|
|
int error;
|
|
|
|
atomic_set(&ctlr_num, 0);
|
|
atomic_set(&fcf_num, 0);
|
|
|
|
error = bus_register(&fcoe_bus_type);
|
|
if (error)
|
|
return error;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __exit fcoe_sysfs_teardown(void)
|
|
{
|
|
bus_unregister(&fcoe_bus_type);
|
|
}
|