linux_dsm_epyc7002/drivers/scsi/fcoe/fcoe_sysfs.c
Robert Love ef60f67434 libfcoe: Save some memory and optimize name lookups
Instead of creating a structure with an enum and a pointer
to a string, simply allocate an array of strings and use
the enum values for the indicies.

This means that we do not need to iterate through the list
of entries when looking up a string name by its enum key.

This will also help with a latter patch that will add
more fcoe_sysfs attributes that will also use the
fcoe_enum_name_search macro. One attribute will also do
a reverse lookup which requires less code when the
enum-to-string mappings are organized as this patch makes
them to be.

Signed-off-by: Robert Love <robert.w.love@intel.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
2012-12-04 10:16:38 -08:00

821 lines
23 KiB
C

/*
* 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 <scsi/fcoe_sysfs.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_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)
#define FCOE_CTLR_MODE_MAX_NAMELEN 50
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;
if (ctlr->f->get_fcoe_ctlr_mode)
ctlr->f->get_fcoe_ctlr_mode(ctlr);
name = get_fcoe_ctlr_mode_name(ctlr->mode);
if (!name)
return -EINVAL;
return snprintf(buf, FCOE_CTLR_MODE_MAX_NAMELEN,
"%s\n", name);
}
static FCOE_DEVICE_ATTR(ctlr, mode, S_IRUGO,
show_ctlr_mode, NULL);
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_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_type fcoe_bus_type = {
.name = "fcoe",
.match = &fcoe_bus_match,
};
/**
* 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
* @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;
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);
}