i40e: Strip configfs code

The use of configfs is not allowed in network drivers.  Strip the code that
uses it.
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/Kconfig

@@ -303,15 +303,6 @@ config I40E_FCOE
 
 	  If unsure, say N.
 
-config I40E_CONFIGFS_FS
-	bool "Config File System Support (configfs)"
-	default n
-	depends on I40E && CONFIGFS_FS && !(I40E=y && CONFIGFS_FS=m)
-	---help---
-	  Provides support for the configfs file system for additional
-	  driver configuration.  Say Y here if you want to use the
-	  configuration file system in the driver.
-
 config I40EVF
 	tristate "Intel(R) XL710 X710 Virtual Function Ethernet support"
 	depends on PCI_MSI

drivers/net/ethernet/intel/i40e/Makefile

@@ -37,7 +37,6 @@ i40e-objs := i40e_main.o \
 	i40e_hmc.o	\
 	i40e_lan_hmc.o	\
 	i40e_nvm.o	\
-	i40e_configfs.o	\
 	i40e_debugfs.o	\
 	i40e_diag.o	\
 	i40e_txrx.o	\

drivers/net/ethernet/intel/i40e/i40e.h

@@ -749,10 +749,6 @@ int i40e_ptp_get_ts_config(struct i40e_pf *pf, struct ifreq *ifr);
 void i40e_ptp_init(struct i40e_pf *pf);
 void i40e_ptp_stop(struct i40e_pf *pf);
 int i40e_is_vsi_uplink_mode_veb(struct i40e_vsi *vsi);
-#if IS_ENABLED(CONFIG_I40E_CONFIGFS_FS)
-int i40e_configfs_init(void);
-void i40e_configfs_exit(void);
-#endif /* CONFIG_I40E_CONFIGFS_FS */
 i40e_status i40e_get_npar_bw_setting(struct i40e_pf *pf);
 i40e_status i40e_set_npar_bw_setting(struct i40e_pf *pf);
 i40e_status i40e_commit_npar_bw_setting(struct i40e_pf *pf);

drivers/net/ethernet/intel/i40e/i40e_configfs.c

-/*******************************************************************************
- *
- * Intel Ethernet Controller XL710 Family Linux Driver
- * Copyright(c) 2013 - 2015 Intel Corporation.
- *
- * 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, see <http://www.gnu.org/licenses/>.
- *
- * The full GNU General Public License is included in this distribution in
- * the file called "COPYING".
- *
- * Contact Information:
- * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
- * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
- *
- ******************************************************************************/
-
-#include <linux/configfs.h>
-#include "i40e.h"
-
-#if IS_ENABLED(CONFIG_I40E_CONFIGFS_FS)
-
-/**
- * configfs structure for i40e
- *
- * This file adds code for configfs support for the i40e driver.  This sets
- * up a filesystem under /sys/kernel/config in which configuration changes
- * can be made for the driver's netdevs.
- *
- * The initialization in this code creates the "i40e" entry in the configfs
- * system.  After that, the user needs to use mkdir to create configurations
- * for specific netdev ports; for example "mkdir eth3".  This code will verify
- * that such a netdev exists and that it is owned by i40e.
- *
- **/
-
-struct i40e_cfgfs_vsi {
-	struct config_item item;
-	struct i40e_vsi *vsi;
-};
-
-static inline struct i40e_cfgfs_vsi *to_i40e_cfgfs_vsi(struct config_item *item)
-{
-	return item ? container_of(item, struct i40e_cfgfs_vsi, item) : NULL;
-}
-
-static struct configfs_attribute i40e_cfgfs_vsi_attr_min_bw = {
-	.ca_owner = THIS_MODULE,
-	.ca_name = "min_bw",
-	.ca_mode = S_IRUGO | S_IWUSR,
-};
-
-static struct configfs_attribute i40e_cfgfs_vsi_attr_max_bw = {
-	.ca_owner = THIS_MODULE,
-	.ca_name = "max_bw",
-	.ca_mode = S_IRUGO | S_IWUSR,
-};
-
-static struct configfs_attribute i40e_cfgfs_vsi_attr_commit = {
-	.ca_owner = THIS_MODULE,
-	.ca_name = "commit",
-	.ca_mode = S_IRUGO | S_IWUSR,
-};
-
-static struct configfs_attribute i40e_cfgfs_vsi_attr_port_count = {
-	.ca_owner = THIS_MODULE,
-	.ca_name = "ports",
-	.ca_mode = S_IRUGO | S_IWUSR,
-};
-
-static struct configfs_attribute i40e_cfgfs_vsi_attr_part_count = {
-	.ca_owner = THIS_MODULE,
-	.ca_name = "partitions",
-	.ca_mode = S_IRUGO | S_IWUSR,
-};
-
-static struct configfs_attribute *i40e_cfgfs_vsi_attrs[] = {
-	&i40e_cfgfs_vsi_attr_min_bw,
-	&i40e_cfgfs_vsi_attr_max_bw,
-	&i40e_cfgfs_vsi_attr_commit,
-	&i40e_cfgfs_vsi_attr_port_count,
-	&i40e_cfgfs_vsi_attr_part_count,
-	NULL,
-};
-
-/**
- * i40e_cfgfs_vsi_attr_show - Show a VSI's NPAR BW partition info
- * @item: A pointer back to the configfs item created on driver load
- * @attr: A pointer to this item's configuration attribute
- * @page: A pointer to the output buffer
- **/
-static ssize_t i40e_cfgfs_vsi_attr_show(struct config_item *item,
-					struct configfs_attribute *attr,
-					char *page)
-{
-	struct i40e_cfgfs_vsi *i40e_cfgfs_vsi = to_i40e_cfgfs_vsi(item);
-	struct i40e_pf *pf = i40e_cfgfs_vsi->vsi->back;
-	ssize_t count;
-
-	if (i40e_cfgfs_vsi->vsi != pf->vsi[pf->lan_vsi])
-		return 0;
-
-	if (strncmp(attr->ca_name, "min_bw", 6) == 0)
-		count = sprintf(page, "%s %s %d%%\n",
-				i40e_cfgfs_vsi->vsi->netdev->name,
-				(pf->npar_min_bw & I40E_ALT_BW_RELATIVE_MASK) ?
-				"Relative Min BW" : "Absolute Min BW",
-				pf->npar_min_bw & I40E_ALT_BW_VALUE_MASK);
-	else if (strncmp(attr->ca_name, "max_bw", 6) == 0)
-		count = sprintf(page, "%s %s %d%%\n",
-				i40e_cfgfs_vsi->vsi->netdev->name,
-				(pf->npar_max_bw & I40E_ALT_BW_RELATIVE_MASK) ?
-				"Relative Max BW" : "Absolute Max BW",
-				pf->npar_max_bw & I40E_ALT_BW_VALUE_MASK);
-	else if (strncmp(attr->ca_name, "ports", 5) == 0)
-		count = sprintf(page, "%d\n",
-				pf->hw.num_ports);
-	else if (strncmp(attr->ca_name, "partitions", 10) == 0)
-		count = sprintf(page, "%d\n",
-				pf->hw.num_partitions);
-	else
-		return 0;
-
-	return count;
-}
-
-/**
- * i40e_cfgfs_vsi_attr_store - Show a VSI's NPAR BW partition info
- * @item: A pointer back to the configfs item created on driver load
- * @attr: A pointer to this item's configuration attribute
- * @page: A pointer to the user input buffer holding the user input values
- **/
-static ssize_t i40e_cfgfs_vsi_attr_store(struct config_item *item,
-					 struct configfs_attribute *attr,
-					 const char *page, size_t count)
-{
-	struct i40e_cfgfs_vsi *i40e_cfgfs_vsi = to_i40e_cfgfs_vsi(item);
-	struct i40e_pf *pf = i40e_cfgfs_vsi->vsi->back;
-	char *p = (char *)page;
-	int rc;
-	unsigned long tmp;
-
-	if (i40e_cfgfs_vsi->vsi != pf->vsi[pf->lan_vsi])
-		return 0;
-
-	if (!p || (*p && (*p == '\n')))
-		return -EINVAL;
-
-	rc = kstrtoul(p, 10, &tmp);
-	if (rc)
-		return rc;
-	if (tmp > 100)
-		return -ERANGE;
-
-	if (strncmp(attr->ca_name, "min_bw", 6) == 0) {
-		if (tmp > (pf->npar_max_bw & I40E_ALT_BW_VALUE_MASK))
-			return -ERANGE;
-		/* Preserve the valid and relative BW bits - the rest is
-		 * don't care.
-		 */
-		pf->npar_min_bw &= (I40E_ALT_BW_RELATIVE_MASK |
-				    I40E_ALT_BW_VALID_MASK);
-		pf->npar_min_bw |= (tmp & I40E_ALT_BW_VALUE_MASK);
-		i40e_set_npar_bw_setting(pf);
-	} else if (strncmp(attr->ca_name, "max_bw", 6) == 0) {
-		if (tmp < 1 ||
-		    tmp < (pf->npar_min_bw & I40E_ALT_BW_VALUE_MASK))
-			return -ERANGE;
-		/* Preserve the valid and relative BW bits - the rest is
-		 * don't care.
-		 */
-		pf->npar_max_bw &= (I40E_ALT_BW_RELATIVE_MASK |
-				    I40E_ALT_BW_VALID_MASK);
-		pf->npar_max_bw |= (tmp & I40E_ALT_BW_VALUE_MASK);
-		i40e_set_npar_bw_setting(pf);
-	} else if (strncmp(attr->ca_name, "commit", 6) == 0 && tmp == 1) {
-		if (i40e_commit_npar_bw_setting(pf))
-			return -EIO;
-	}
-
-	return count;
-}
-
-/**
- * i40e_cfgfs_vsi_release - Free up the configuration item memory
- * @item: A pointer back to the configfs item created on driver load
- **/
-static void i40e_cfgfs_vsi_release(struct config_item *item)
-{
-	kfree(to_i40e_cfgfs_vsi(item));
-}
-
-static struct configfs_item_operations i40e_cfgfs_vsi_item_ops = {
-	.release		= i40e_cfgfs_vsi_release,
-	.show_attribute		= i40e_cfgfs_vsi_attr_show,
-	.store_attribute	= i40e_cfgfs_vsi_attr_store,
-};
-
-static struct config_item_type i40e_cfgfs_vsi_type = {
-	.ct_item_ops	= &i40e_cfgfs_vsi_item_ops,
-	.ct_attrs	= i40e_cfgfs_vsi_attrs,
-	.ct_owner	= THIS_MODULE,
-};
-
-struct i40e_cfgfs_group {
-	struct config_group group;
-};
-
-/**
- * to_i40e_cfgfs_group - Get the group pointer from the config item
- * @item: A pointer back to the configfs item created on driver load
- **/
-static inline struct i40e_cfgfs_group *
-to_i40e_cfgfs_group(struct config_item *item)
-{
-	return item ? container_of(to_config_group(item),
-				   struct i40e_cfgfs_group, group) : NULL;
-}
-
-/**
- * i40e_cfgfs_group_make_item - Create the configfs item with group container
- * @group: A pointer to our configfs group
- * @name: A pointer to the nume of the device we're looking for
- **/
-static struct config_item *
-i40e_cfgfs_group_make_item(struct config_group *group, const char *name)
-{
-	struct i40e_cfgfs_vsi *i40e_cfgfs_vsi;
-	struct net_device *netdev;
-	struct i40e_netdev_priv *np;
-
-	read_lock(&dev_base_lock);
-	netdev = first_net_device(&init_net);
-	while (netdev) {
-		if (strncmp(netdev->name, name, sizeof(netdev->name)) == 0)
-			break;
-		netdev = next_net_device(netdev);
-	}
-	read_unlock(&dev_base_lock);
-
-	if (!netdev)
-		return ERR_PTR(-ENODEV);
-
-	/* is this netdev owned by i40e? */
-	if (netdev->netdev_ops->ndo_open != i40e_open)
-		return ERR_PTR(-EACCES);
-
-	i40e_cfgfs_vsi = kzalloc(sizeof(*i40e_cfgfs_vsi), GFP_KERNEL);
-	if (!i40e_cfgfs_vsi)
-		return ERR_PTR(-ENOMEM);
-
-	np = netdev_priv(netdev);
-	i40e_cfgfs_vsi->vsi = np->vsi;
-	config_item_init_type_name(&i40e_cfgfs_vsi->item, name,
-				   &i40e_cfgfs_vsi_type);
-
-	return &i40e_cfgfs_vsi->item;
-}
-
-static struct configfs_attribute i40e_cfgfs_group_attr_description = {
-	.ca_owner = THIS_MODULE,
-	.ca_name = "description",
-	.ca_mode = S_IRUGO,
-};
-
-static struct configfs_attribute *i40e_cfgfs_group_attrs[] = {
-	&i40e_cfgfs_group_attr_description,
-	NULL,
-};
-
-static ssize_t i40e_cfgfs_group_attr_show(struct config_item *item,
-					  struct configfs_attribute *attr,
-					  char *page)
-{
-	return sprintf(page,
-"i40e\n"
-"\n"
-"This subsystem allows the modification of network port configurations.\n"
-"To start, use the name of the network port to be configured in a 'mkdir'\n"
-"command, e.g. 'mkdir eth3'.\n");
-}
-
-static void i40e_cfgfs_group_release(struct config_item *item)
-{
-	kfree(to_i40e_cfgfs_group(item));
-}
-
-static struct configfs_item_operations i40e_cfgfs_group_item_ops = {
-	.release	= i40e_cfgfs_group_release,
-	.show_attribute	= i40e_cfgfs_group_attr_show,
-};
-
-/* Note that, since no extra work is required on ->drop_item(),
- * no ->drop_item() is provided.
- */
-static struct configfs_group_operations i40e_cfgfs_group_ops = {
-	.make_item	= i40e_cfgfs_group_make_item,
-};
-
-static struct config_item_type i40e_cfgfs_group_type = {
-	.ct_item_ops	= &i40e_cfgfs_group_item_ops,
-	.ct_group_ops	= &i40e_cfgfs_group_ops,
-	.ct_attrs	= i40e_cfgfs_group_attrs,
-	.ct_owner	= THIS_MODULE,
-};
-
-static struct configfs_subsystem i40e_cfgfs_group_subsys = {
-	.su_group = {
-		.cg_item = {
-			.ci_namebuf = "i40e",
-			.ci_type = &i40e_cfgfs_group_type,
-		},
-	},
-};
-
-/**
- * i40e_configfs_init - Initialize configfs support for our driver
- **/
-int i40e_configfs_init(void)
-{
-	int ret;
-	struct configfs_subsystem *subsys;
-
-	subsys = &i40e_cfgfs_group_subsys;
-
-	config_group_init(&subsys->su_group);
-	mutex_init(&subsys->su_mutex);
-	ret = configfs_register_subsystem(subsys);
-	if (ret) {
-		pr_err("Error %d while registering configfs subsystem %s\n",
-		       ret, subsys->su_group.cg_item.ci_namebuf);
-		return ret;
-	}
-
-	return 0;
-}
-
-/**
- * i40e_configfs_init - Bail out - unregister configfs subsystem and release
- **/
-void i40e_configfs_exit(void)
-{
-	configfs_unregister_subsystem(&i40e_cfgfs_group_subsys);
-}
-#endif /* IS_ENABLED(CONFIG_I40E_CONFIGFS_FS) */

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -10287,9 +10287,6 @@ static int __init i40e_init_module(void)
 		i40e_driver_string, i40e_driver_version_str);
 	pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
 
-#if IS_ENABLED(CONFIG_I40E_CONFIGFS_FS)
-	i40e_configfs_init();
-#endif /* CONFIG_I40E_CONFIGFS_FS */
 	i40e_dbg_init();
 	return pci_register_driver(&i40e_driver);
 }
@@ -10305,8 +10302,5 @@ static void __exit i40e_exit_module(void)
 {
 	pci_unregister_driver(&i40e_driver);
 	i40e_dbg_exit();
-#if IS_ENABLED(CONFIG_I40E_CONFIGFS_FS)
-	i40e_configfs_exit();
-#endif /* CONFIG_I40E_CONFIGFS_FS */
 }
 module_exit(i40e_exit_module);