/*
* Copyright(c) 2011 - 2012 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* Maintained at www.Open-FCoE.org
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/etherdevice.h>
#include <linux/ctype.h>
#include <scsi/fcoe_sysfs.h>
#include <scsi/libfcoe.h>
/*
* OK to include local libfcoe.h for debug_logging, but cannot include
* <scsi/libfcoe.h> otherwise non-netdev based fcoe solutions would have
* have to include more than fcoe_sysfs.h.
*/
#include "libfcoe.h"
static atomic_t ctlr_num;
static atomic_t fcf_num;
/*
* fcoe_fcf_dev_loss_tmo: the default number of seconds that fcoe sysfs
* should insulate the loss of a fcf.
*/
static unsigned int fcoe_fcf_dev_loss_tmo = 1800; /* seconds */
module_param_named(fcf_dev_loss_tmo, fcoe_fcf_dev_loss_tmo,
uint, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(fcf_dev_loss_tmo,
"Maximum number of seconds that libfcoe should"
" insulate the loss of a fcf. Once this value is"
" exceeded, the fcf is removed.");
/*
* These are used by the fcoe_*_show_function routines, they
* are intentionally placed in the .c file as they're not intended
* for use throughout the code.
*/
#define fcoe_ctlr_id(x) \
((x)->id)
#define fcoe_ctlr_work_q_name(x) \
((x)->work_q_name)
#define fcoe_ctlr_work_q(x) \
((x)->work_q)
#define fcoe_ctlr_devloss_work_q_name(x) \
((x)->devloss_work_q_name)
#define fcoe_ctlr_devloss_work_q(x) \
((x)->devloss_work_q)
#define fcoe_ctlr_mode(x) \
((x)->mode)
#define fcoe_ctlr_fcf_dev_loss_tmo(x) \
((x)->fcf_dev_loss_tmo)
#define fcoe_ctlr_link_fail(x) \
((x)->lesb.lesb_link_fail)
#define fcoe_ctlr_vlink_fail(x) \
((x)->lesb.lesb_vlink_fail)
#define fcoe_ctlr_miss_fka(x) \
((x)->lesb.lesb_miss_fka)
#define fcoe_ctlr_symb_err(x) \
((x)->lesb.lesb_symb_err)
#define fcoe_ctlr_err_block(x) \
((x)->lesb.lesb_err_block)
#define fcoe_ctlr_fcs_error(x) \
((x)->lesb.lesb_fcs_error)
#define fcoe_ctlr_enabled(x) \
((x)->enabled)
#define fcoe_fcf_state(x) \
((x)->state)
#define fcoe_fcf_fabric_name(x) \
((x)->fabric_name)
#define fcoe_fcf_switch_name(x) \
((x)->switch_name)
#define fcoe_fcf_fc_map(x) \
((x)->fc_map)
#define fcoe_fcf_vfid(x) \
((x)->vfid)
#define fcoe_fcf_mac(x) \
((x)->mac)
#define fcoe_fcf_priority(x) \
((x)->priority)
#define fcoe_fcf_fka_period(x) \
((x)->fka_period)
#define fcoe_fcf_dev_loss_tmo(x) \
((x)->dev_loss_tmo)
#define fcoe_fcf_selected(x) \
((x)->selected)
#define fcoe_fcf_vlan_id(x) \
((x)->vlan_id)
/*
* dev_loss_tmo attribute
*/
static int fcoe_str_to_dev_loss(const char *buf, unsigned long *val)
{
int ret;
ret = kstrtoul(buf, 0, val);
if (ret)
return -EINVAL;
/*
* Check for overflow; dev_loss_tmo is u32
*/
if (*val > UINT_MAX)
return -EINVAL;
return 0;
}
static int fcoe_fcf_set_dev_loss_tmo(struct fcoe_fcf_device *fcf,
unsigned long val)
{
if ((fcf->state == FCOE_FCF_STATE_UNKNOWN) ||
(fcf->state == FCOE_FCF_STATE_DISCONNECTED) ||
(fcf->state == FCOE_FCF_STATE_DELETED))
return -EBUSY;
/*
* Check for overflow; dev_loss_tmo is u32
*/
if (val > UINT_MAX)
return -EINVAL;
fcoe_fcf_dev_loss_tmo(fcf) = val;
return 0;
}
#define FCOE_DEVICE_ATTR(_prefix, _name, _mode, _show, _store) \
struct device_attribute device_attr_fcoe_##_prefix##_##_name = \
__ATTR(_name, _mode, _show, _store)
#define fcoe_ctlr_show_function(field, format_string, sz, cast) \
static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
if (ctlr->f->get_fcoe_ctlr_##field) \
ctlr->f->get_fcoe_ctlr_##field(ctlr); \
return snprintf(buf, sz, format_string, \
cast fcoe_ctlr_##field(ctlr)); \
}
#define fcoe_fcf_show_function(field, format_string, sz, cast) \
static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
struct fcoe_ctlr_device *ctlr = fcoe_fcf_dev_to_ctlr_dev(fcf); \
if (ctlr->f->get_fcoe_fcf_##field) \
ctlr->f->get_fcoe_fcf_##field(fcf); \
return snprintf(buf, sz, format_string, \
cast fcoe_fcf_##field(fcf)); \
}
#define fcoe_ctlr_private_show_function(field, format_string, sz, cast) \
static ssize_t show_fcoe_ctlr_device_##field(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev); \
return snprintf(buf, sz, format_string, cast fcoe_ctlr_##field(ctlr)); \
}
#define fcoe_fcf_private_show_function(field, format_string, sz, cast) \
static ssize_t show_fcoe_fcf_device_##field(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct fcoe_fcf_device *fcf = dev_to_fcf(dev); \
return snprintf(buf, sz, format_string, cast fcoe_fcf_##field(fcf)); \
}
#define fcoe_ctlr_private_rd_attr(field, format_string, sz) \
fcoe_ctlr_private_show_function(field, format_string, sz, ) \
static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
show_fcoe_ctlr_device_##field, NULL)
#define fcoe_ctlr_rd_attr(field, format_string, sz) \
fcoe_ctlr_show_function(field, format_string, sz, ) \
static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
show_fcoe_ctlr_device_##field, NULL)
#define fcoe_fcf_rd_attr(field, format_string, sz) \
fcoe_fcf_show_function(field, format_string, sz, ) \
static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
show_fcoe_fcf_device_##field, NULL)
#define fcoe_fcf_private_rd_attr(field, format_string, sz) \
fcoe_fcf_private_show_function(field, format_string, sz, ) \
static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
show_fcoe_fcf_device_##field, NULL)
#define fcoe_ctlr_private_rd_attr_cast(field, format_string, sz, cast) \
fcoe_ctlr_private_show_function(field, format_string, sz, (cast)) \
static FCOE_DEVICE_ATTR(ctlr, field, S_IRUGO, \
show_fcoe_ctlr_device_##field, NULL)
#define fcoe_fcf_private_rd_attr_cast(field, format_string, sz, cast) \
fcoe_fcf_private_show_function(field, format_string, sz, (cast)) \
static FCOE_DEVICE_ATTR(fcf, field, S_IRUGO, \
show_fcoe_fcf_device_##field, NULL)
#define fcoe_enum_name_search(title, table_type, table) \
static const char *get_fcoe_##title##_name(enum table_type table_key) \
{ \
if (table_key < 0 || table_key >= ARRAY_SIZE(table)) \
return NULL; \
return table[table_key]; \
}
static char *fip_conn_type_names[] = {
[ FIP_CONN_TYPE_UNKNOWN ] = "Unknown",
[ FIP_CONN_TYPE_FABRIC ] = "Fabric",
[ FIP_CONN_TYPE_VN2VN ] = "VN2VN",
};
fcoe_enum_name_search(ctlr_mode, fip_conn_type, fip_conn_type_names)
static enum fip_conn_type fcoe_parse_mode(const char *buf)
{
int i;
for (i = 0; i < ARRAY_SIZE(fip_conn_type_names); i++) {
if (strcasecmp(buf, fip_conn_type_names[i]) == 0)
return i;
}
return FIP_CONN_TYPE_UNKNOWN;
}
static char *fcf_state_names[] = {
[ FCOE_FCF_STATE_UNKNOWN ] = "Unknown",
[ FCOE_FCF_STATE_DISCONNECTED ] = "Disconnected",
[ FCOE_FCF_STATE_CONNECTED ] = "Connected",
};
fcoe_enum_name_search(fcf_state, fcf_state, fcf_state_names)
#define FCOE_FCF_STATE_MAX_NAMELEN 50
static ssize_t show_fcf_state(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
const char *name;
name = get_fcoe_fcf_state_name(fcf->state);
if (!name)
return -EINVAL;
return snprintf(buf, FCOE_FCF_STATE_MAX_NAMELEN, "%s\n", name);
}
static FCOE_DEVICE_ATTR(fcf, state, S_IRUGO, show_fcf_state, NULL);
#define FCOE_MAX_MODENAME_LEN 20
static ssize_t show_ctlr_mode(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
const char *name;
name = get_fcoe_ctlr_mode_name(ctlr->mode);
if (!name)
return -EINVAL;
return snprintf(buf, FCOE_MAX_MODENAME_LEN,
"%s\n", name);
}
static ssize_t store_ctlr_mode(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
char mode[FCOE_MAX_MODENAME_LEN + 1];
if (count > FCOE_MAX_MODENAME_LEN)
return -EINVAL;
strncpy(mode, buf, count);
if (mode[count - 1] == '\n')
mode[count - 1] = '\0';
else
mode[count] = '\0';
switch (ctlr->enabled) {
case FCOE_CTLR_ENABLED:
LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.");
return -EBUSY;
case FCOE_CTLR_DISABLED:
if (!ctlr->f->set_fcoe_ctlr_mode) {
LIBFCOE_SYSFS_DBG(ctlr,
"Mode change not supported by LLD.");
return -ENOTSUPP;
}
ctlr->mode = fcoe_parse_mode(mode);
if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
LIBFCOE_SYSFS_DBG(ctlr,
"Unknown mode %s provided.", buf);
return -EINVAL;
}
ctlr->f->set_fcoe_ctlr_mode(ctlr);
LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.", buf);
return count;
case FCOE_CTLR_UNUSED:
default:
LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.");
return -ENOTSUPP;
};
}
static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO | S_IWUSR,
show_ctlr_mode, store_ctlr_mode);
static ssize_t store_ctlr_enabled(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
int rc;
switch (ctlr->enabled) {
case FCOE_CTLR_ENABLED:
if (*buf == '1')
return count;
ctlr->enabled = FCOE_CTLR_DISABLED;
break;
case FCOE_CTLR_DISABLED:
if (*buf == '0')
return count;
ctlr->enabled = FCOE_CTLR_ENABLED;
break;
case FCOE_CTLR_UNUSED:
return -ENOTSUPP;
};
rc = ctlr->f->set_fcoe_ctlr_enabled(ctlr);
if (rc)
return rc;
return count;
}
static char *ctlr_enabled_state_names[] = {
[ FCOE_CTLR_ENABLED ] = "1",
[ FCOE_CTLR_DISABLED ] = "0",
};
fcoe_enum_name_search(ctlr_enabled_state, ctlr_enabled_state,
ctlr_enabled_state_names)
#define FCOE_CTLR_ENABLED_MAX_NAMELEN 50
static ssize_t show_ctlr_enabled_state(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
const char *name;
name = get_fcoe_ctlr_enabled_state_name(ctlr->enabled);
if (!name)
return -EINVAL;
return snprintf(buf, FCOE_CTLR_ENABLED_MAX_NAMELEN,
"%s\n", name);
}
static FCOE_DEVICE_ATTR(ctlr, enabled, S_IRUGO | S_IWUSR,
show_ctlr_enabled_state,
store_ctlr_enabled);
static ssize_t
store_private_fcoe_ctlr_fcf_dev_loss_tmo(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct fcoe_ctlr_device *ctlr = dev_to_ctlr(dev);
struct fcoe_fcf_device *fcf;
unsigned long val;
int rc;
rc = fcoe_str_to_dev_loss(buf, &val);
if (rc)
return rc;
fcoe_ctlr_fcf_dev_loss_tmo(ctlr) = val;
mutex_lock(&ctlr->lock);
list_for_each_entry(fcf, &ctlr->fcfs, peers)
fcoe_fcf_set_dev_loss_tmo(fcf, val);
mutex_unlock(&ctlr->lock);
return count;
}
fcoe_ctlr_private_show_function(fcf_dev_loss_tmo, "%d\n", 20, );
static FCOE_DEVICE_ATTR(ctlr, fcf_dev_loss_tmo, S_IRUGO | S_IWUSR,
show_fcoe_ctlr_device_fcf_dev_loss_tmo,
store_private_fcoe_ctlr_fcf_dev_loss_tmo);
/* Link Error Status Block (LESB) */
fcoe_ctlr_rd_attr(link_fail, "%u\n", 20);
fcoe_ctlr_rd_attr(vlink_fail, "%u\n", 20);
fcoe_ctlr_rd_attr(miss_fka, "%u\n", 20);
fcoe_ctlr_rd_attr(symb_err, "%u\n", 20);
fcoe_ctlr_rd_attr(err_block, "%u\n", 20);
fcoe_ctlr_rd_attr(fcs_error, "%u\n", 20);
fcoe_fcf_private_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long);
fcoe_fcf_private_rd_attr_cast(switch_name, "0x%llx\n", 20, unsigned long long);
fcoe_fcf_private_rd_attr(priority, "%u\n", 20);
fcoe_fcf_private_rd_attr(fc_map, "0x%x\n", 20);
fcoe_fcf_private_rd_attr(vfid, "%u\n", 20);
fcoe_fcf_private_rd_attr(mac, "%pM\n", 20);
fcoe_fcf_private_rd_attr(fka_period, "%u\n", 20);
fcoe_fcf_rd_attr(selected, "%u\n", 20);
fcoe_fcf_rd_attr(vlan_id, "%u\n", 20);
fcoe_fcf_private_show_function(dev_loss_tmo, "%d\n", 20, )
static ssize_t
store_fcoe_fcf_dev_loss_tmo(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct fcoe_fcf_device *fcf = dev_to_fcf(dev);
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,
};
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);
}
struct device_type fcoe_ctlr_device_type = {
.name = "fcoe_ctlr",
.groups = fcoe_ctlr_attr_groups,
.release = fcoe_ctlr_device_release,
};
struct device_type fcoe_fcf_device_type = {
.name = "fcoe_fcf",
.groups = fcoe_fcf_attr_groups,
.release = fcoe_fcf_device_release,
};
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
};
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
*/
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
*/
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
*/
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
*/
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
* : 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);
}