diff options
Diffstat (limited to 'drivers/net/bonding/bond_sysfs.c')
| -rw-r--r-- | drivers/net/bonding/bond_sysfs.c | 784 |
1 files changed, 784 insertions, 0 deletions
diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c new file mode 100644 index 000000000..7e9e151d4 --- /dev/null +++ b/drivers/net/bonding/bond_sysfs.c @@ -0,0 +1,784 @@ +/* + * Copyright(c) 2004-2005 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that 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 LICENSE. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/types.h> +#include <linux/string.h> +#include <linux/netdevice.h> +#include <linux/inetdevice.h> +#include <linux/in.h> +#include <linux/sysfs.h> +#include <linux/ctype.h> +#include <linux/inet.h> +#include <linux/rtnetlink.h> +#include <linux/etherdevice.h> +#include <net/net_namespace.h> +#include <net/netns/generic.h> +#include <linux/nsproxy.h> + +#include <net/bonding.h> + +#define to_dev(obj) container_of(obj, struct device, kobj) +#define to_bond(cd) ((struct bonding *)(netdev_priv(to_net_dev(cd)))) + +/* "show" function for the bond_masters attribute. + * The class parameter is ignored. + */ +static ssize_t bonding_show_bonds(struct class *cls, + struct class_attribute *attr, + char *buf) +{ + struct bond_net *bn = + container_of(attr, struct bond_net, class_attr_bonding_masters); + int res = 0; + struct bonding *bond; + + rtnl_lock(); + + list_for_each_entry(bond, &bn->dev_list, bond_list) { + if (res > (PAGE_SIZE - IFNAMSIZ)) { + /* not enough space for another interface name */ + if ((PAGE_SIZE - res) > 10) + res = PAGE_SIZE - 10; + res += sprintf(buf + res, "++more++ "); + break; + } + res += sprintf(buf + res, "%s ", bond->dev->name); + } + if (res) + buf[res-1] = '\n'; /* eat the leftover space */ + + rtnl_unlock(); + return res; +} + +static struct net_device *bond_get_by_name(struct bond_net *bn, const char *ifname) +{ + struct bonding *bond; + + list_for_each_entry(bond, &bn->dev_list, bond_list) { + if (strncmp(bond->dev->name, ifname, IFNAMSIZ) == 0) + return bond->dev; + } + return NULL; +} + +/* "store" function for the bond_masters attribute. This is what + * creates and deletes entire bonds. + * + * The class parameter is ignored. + */ +static ssize_t bonding_store_bonds(struct class *cls, + struct class_attribute *attr, + const char *buffer, size_t count) +{ + struct bond_net *bn = + container_of(attr, struct bond_net, class_attr_bonding_masters); + char command[IFNAMSIZ + 1] = {0, }; + char *ifname; + int rv, res = count; + + sscanf(buffer, "%16s", command); /* IFNAMSIZ*/ + ifname = command + 1; + if ((strlen(command) <= 1) || + !dev_valid_name(ifname)) + goto err_no_cmd; + + if (command[0] == '+') { + pr_info("%s is being created...\n", ifname); + rv = bond_create(bn->net, ifname); + if (rv) { + if (rv == -EEXIST) + pr_info("%s already exists\n", ifname); + else + pr_info("%s creation failed\n", ifname); + res = rv; + } + } else if (command[0] == '-') { + struct net_device *bond_dev; + + rtnl_lock(); + bond_dev = bond_get_by_name(bn, ifname); + if (bond_dev) { + pr_info("%s is being deleted...\n", ifname); + unregister_netdevice(bond_dev); + } else { + pr_err("unable to delete non-existent %s\n", ifname); + res = -ENODEV; + } + rtnl_unlock(); + } else + goto err_no_cmd; + + /* Always return either count or an error. If you return 0, you'll + * get called forever, which is bad. + */ + return res; + +err_no_cmd: + pr_err("no command found in bonding_masters - use +ifname or -ifname\n"); + return -EPERM; +} + +/* class attribute for bond_masters file. This ends up in /sys/class/net */ +static const struct class_attribute class_attr_bonding_masters = { + .attr = { + .name = "bonding_masters", + .mode = S_IWUSR | S_IRUGO, + }, + .show = bonding_show_bonds, + .store = bonding_store_bonds, +}; + +/* Generic "store" method for bonding sysfs option setting */ +static ssize_t bonding_sysfs_store_option(struct device *d, + struct device_attribute *attr, + const char *buffer, size_t count) +{ + struct bonding *bond = to_bond(d); + const struct bond_option *opt; + int ret; + + opt = bond_opt_get_by_name(attr->attr.name); + if (WARN_ON(!opt)) + return -ENOENT; + ret = bond_opt_tryset_rtnl(bond, opt->id, (char *)buffer); + if (!ret) + ret = count; + + return ret; +} + +/* Show the slaves in the current bond. */ +static ssize_t bonding_show_slaves(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct bonding *bond = to_bond(d); + struct list_head *iter; + struct slave *slave; + int res = 0; + + if (!rtnl_trylock()) + return restart_syscall(); + + bond_for_each_slave(bond, slave, iter) { + if (res > (PAGE_SIZE - IFNAMSIZ)) { + /* not enough space for another interface name */ + if ((PAGE_SIZE - res) > 10) + res = PAGE_SIZE - 10; + res += sprintf(buf + res, "++more++ "); + break; + } + res += sprintf(buf + res, "%s ", slave->dev->name); + } + + rtnl_unlock(); + + if (res) + buf[res-1] = '\n'; /* eat the leftover space */ + + return res; +} +static DEVICE_ATTR(slaves, S_IRUGO | S_IWUSR, bonding_show_slaves, + bonding_sysfs_store_option); + +/* Show the bonding mode. */ +static ssize_t bonding_show_mode(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_MODE, BOND_MODE(bond)); + + return sprintf(buf, "%s %d\n", val->string, BOND_MODE(bond)); +} +static DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, + bonding_show_mode, bonding_sysfs_store_option); + +/* Show the bonding transmit hash method. */ +static ssize_t bonding_show_xmit_hash(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_XMIT_HASH, bond->params.xmit_policy); + + return sprintf(buf, "%s %d\n", val->string, bond->params.xmit_policy); +} +static DEVICE_ATTR(xmit_hash_policy, S_IRUGO | S_IWUSR, + bonding_show_xmit_hash, bonding_sysfs_store_option); + +/* Show arp_validate. */ +static ssize_t bonding_show_arp_validate(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_ARP_VALIDATE, + bond->params.arp_validate); + + return sprintf(buf, "%s %d\n", val->string, bond->params.arp_validate); +} +static DEVICE_ATTR(arp_validate, S_IRUGO | S_IWUSR, bonding_show_arp_validate, + bonding_sysfs_store_option); + +/* Show arp_all_targets. */ +static ssize_t bonding_show_arp_all_targets(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_ARP_ALL_TARGETS, + bond->params.arp_all_targets); + return sprintf(buf, "%s %d\n", + val->string, bond->params.arp_all_targets); +} +static DEVICE_ATTR(arp_all_targets, S_IRUGO | S_IWUSR, + bonding_show_arp_all_targets, bonding_sysfs_store_option); + +/* Show fail_over_mac. */ +static ssize_t bonding_show_fail_over_mac(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_FAIL_OVER_MAC, + bond->params.fail_over_mac); + + return sprintf(buf, "%s %d\n", val->string, bond->params.fail_over_mac); +} +static DEVICE_ATTR(fail_over_mac, S_IRUGO | S_IWUSR, + bonding_show_fail_over_mac, bonding_sysfs_store_option); + +/* Show the arp timer interval. */ +static ssize_t bonding_show_arp_interval(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.arp_interval); +} +static DEVICE_ATTR(arp_interval, S_IRUGO | S_IWUSR, + bonding_show_arp_interval, bonding_sysfs_store_option); + +/* Show the arp targets. */ +static ssize_t bonding_show_arp_targets(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + int i, res = 0; + + for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) { + if (bond->params.arp_targets[i]) + res += sprintf(buf + res, "%pI4 ", + &bond->params.arp_targets[i]); + } + if (res) + buf[res-1] = '\n'; /* eat the leftover space */ + + return res; +} +static DEVICE_ATTR(arp_ip_target, S_IRUGO | S_IWUSR, + bonding_show_arp_targets, bonding_sysfs_store_option); + +/* Show the up and down delays. */ +static ssize_t bonding_show_downdelay(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon); +} +static DEVICE_ATTR(downdelay, S_IRUGO | S_IWUSR, + bonding_show_downdelay, bonding_sysfs_store_option); + +static ssize_t bonding_show_updelay(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon); + +} +static DEVICE_ATTR(updelay, S_IRUGO | S_IWUSR, + bonding_show_updelay, bonding_sysfs_store_option); + +/* Show the LACP interval. */ +static ssize_t bonding_show_lacp(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_LACP_RATE, bond->params.lacp_fast); + + return sprintf(buf, "%s %d\n", val->string, bond->params.lacp_fast); +} +static DEVICE_ATTR(lacp_rate, S_IRUGO | S_IWUSR, + bonding_show_lacp, bonding_sysfs_store_option); + +static ssize_t bonding_show_min_links(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%u\n", bond->params.min_links); +} +static DEVICE_ATTR(min_links, S_IRUGO | S_IWUSR, + bonding_show_min_links, bonding_sysfs_store_option); + +static ssize_t bonding_show_ad_select(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select); + + return sprintf(buf, "%s %d\n", val->string, bond->params.ad_select); +} +static DEVICE_ATTR(ad_select, S_IRUGO | S_IWUSR, + bonding_show_ad_select, bonding_sysfs_store_option); + +/* Show and set the number of peer notifications to send after a failover event. */ +static ssize_t bonding_show_num_peer_notif(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + return sprintf(buf, "%d\n", bond->params.num_peer_notif); +} + +static ssize_t bonding_store_num_peer_notif(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct bonding *bond = to_bond(d); + int ret; + + ret = bond_opt_tryset_rtnl(bond, BOND_OPT_NUM_PEER_NOTIF, (char *)buf); + if (!ret) + ret = count; + + return ret; +} +static DEVICE_ATTR(num_grat_arp, S_IRUGO | S_IWUSR, + bonding_show_num_peer_notif, bonding_store_num_peer_notif); +static DEVICE_ATTR(num_unsol_na, S_IRUGO | S_IWUSR, + bonding_show_num_peer_notif, bonding_store_num_peer_notif); + +/* Show the MII monitor interval. */ +static ssize_t bonding_show_miimon(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.miimon); +} +static DEVICE_ATTR(miimon, S_IRUGO | S_IWUSR, + bonding_show_miimon, bonding_sysfs_store_option); + +/* Show the primary slave. */ +static ssize_t bonding_show_primary(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + struct slave *primary; + int count = 0; + + rcu_read_lock(); + primary = rcu_dereference(bond->primary_slave); + if (primary) + count = sprintf(buf, "%s\n", primary->dev->name); + rcu_read_unlock(); + + return count; +} +static DEVICE_ATTR(primary, S_IRUGO | S_IWUSR, + bonding_show_primary, bonding_sysfs_store_option); + +/* Show the primary_reselect flag. */ +static ssize_t bonding_show_primary_reselect(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + const struct bond_opt_value *val; + + val = bond_opt_get_val(BOND_OPT_PRIMARY_RESELECT, + bond->params.primary_reselect); + + return sprintf(buf, "%s %d\n", + val->string, bond->params.primary_reselect); +} +static DEVICE_ATTR(primary_reselect, S_IRUGO | S_IWUSR, + bonding_show_primary_reselect, bonding_sysfs_store_option); + +/* Show the use_carrier flag. */ +static ssize_t bonding_show_carrier(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.use_carrier); +} +static DEVICE_ATTR(use_carrier, S_IRUGO | S_IWUSR, + bonding_show_carrier, bonding_sysfs_store_option); + + +/* Show currently active_slave. */ +static ssize_t bonding_show_active_slave(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + struct net_device *slave_dev; + int count = 0; + + rcu_read_lock(); + slave_dev = bond_option_active_slave_get_rcu(bond); + if (slave_dev) + count = sprintf(buf, "%s\n", slave_dev->name); + rcu_read_unlock(); + + return count; +} +static DEVICE_ATTR(active_slave, S_IRUGO | S_IWUSR, + bonding_show_active_slave, bonding_sysfs_store_option); + +/* Show link status of the bond interface. */ +static ssize_t bonding_show_mii_status(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + bool active = !!rcu_access_pointer(bond->curr_active_slave); + + return sprintf(buf, "%s\n", active ? "up" : "down"); +} +static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL); + +/* Show current 802.3ad aggregator ID. */ +static ssize_t bonding_show_ad_aggregator(struct device *d, + struct device_attribute *attr, + char *buf) +{ + int count = 0; + struct bonding *bond = to_bond(d); + + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct ad_info ad_info; + count = sprintf(buf, "%d\n", + bond_3ad_get_active_agg_info(bond, &ad_info) + ? 0 : ad_info.aggregator_id); + } + + return count; +} +static DEVICE_ATTR(ad_aggregator, S_IRUGO, bonding_show_ad_aggregator, NULL); + + +/* Show number of active 802.3ad ports. */ +static ssize_t bonding_show_ad_num_ports(struct device *d, + struct device_attribute *attr, + char *buf) +{ + int count = 0; + struct bonding *bond = to_bond(d); + + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct ad_info ad_info; + count = sprintf(buf, "%d\n", + bond_3ad_get_active_agg_info(bond, &ad_info) + ? 0 : ad_info.ports); + } + + return count; +} +static DEVICE_ATTR(ad_num_ports, S_IRUGO, bonding_show_ad_num_ports, NULL); + + +/* Show current 802.3ad actor key. */ +static ssize_t bonding_show_ad_actor_key(struct device *d, + struct device_attribute *attr, + char *buf) +{ + int count = 0; + struct bonding *bond = to_bond(d); + + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct ad_info ad_info; + count = sprintf(buf, "%d\n", + bond_3ad_get_active_agg_info(bond, &ad_info) + ? 0 : ad_info.actor_key); + } + + return count; +} +static DEVICE_ATTR(ad_actor_key, S_IRUGO, bonding_show_ad_actor_key, NULL); + + +/* Show current 802.3ad partner key. */ +static ssize_t bonding_show_ad_partner_key(struct device *d, + struct device_attribute *attr, + char *buf) +{ + int count = 0; + struct bonding *bond = to_bond(d); + + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct ad_info ad_info; + count = sprintf(buf, "%d\n", + bond_3ad_get_active_agg_info(bond, &ad_info) + ? 0 : ad_info.partner_key); + } + + return count; +} +static DEVICE_ATTR(ad_partner_key, S_IRUGO, bonding_show_ad_partner_key, NULL); + + +/* Show current 802.3ad partner mac. */ +static ssize_t bonding_show_ad_partner_mac(struct device *d, + struct device_attribute *attr, + char *buf) +{ + int count = 0; + struct bonding *bond = to_bond(d); + + if (BOND_MODE(bond) == BOND_MODE_8023AD) { + struct ad_info ad_info; + if (!bond_3ad_get_active_agg_info(bond, &ad_info)) + count = sprintf(buf, "%pM\n", ad_info.partner_system); + } + + return count; +} +static DEVICE_ATTR(ad_partner_mac, S_IRUGO, bonding_show_ad_partner_mac, NULL); + +/* Show the queue_ids of the slaves in the current bond. */ +static ssize_t bonding_show_queue_id(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + struct list_head *iter; + struct slave *slave; + int res = 0; + + if (!rtnl_trylock()) + return restart_syscall(); + + bond_for_each_slave(bond, slave, iter) { + if (res > (PAGE_SIZE - IFNAMSIZ - 6)) { + /* not enough space for another interface_name:queue_id pair */ + if ((PAGE_SIZE - res) > 10) + res = PAGE_SIZE - 10; + res += sprintf(buf + res, "++more++ "); + break; + } + res += sprintf(buf + res, "%s:%d ", + slave->dev->name, slave->queue_id); + } + if (res) + buf[res-1] = '\n'; /* eat the leftover space */ + + rtnl_unlock(); + + return res; +} +static DEVICE_ATTR(queue_id, S_IRUGO | S_IWUSR, bonding_show_queue_id, + bonding_sysfs_store_option); + + +/* Show the all_slaves_active flag. */ +static ssize_t bonding_show_slaves_active(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.all_slaves_active); +} +static DEVICE_ATTR(all_slaves_active, S_IRUGO | S_IWUSR, + bonding_show_slaves_active, bonding_sysfs_store_option); + +/* Show the number of IGMP membership reports to send on link failure */ +static ssize_t bonding_show_resend_igmp(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.resend_igmp); +} +static DEVICE_ATTR(resend_igmp, S_IRUGO | S_IWUSR, + bonding_show_resend_igmp, bonding_sysfs_store_option); + + +static ssize_t bonding_show_lp_interval(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%d\n", bond->params.lp_interval); +} +static DEVICE_ATTR(lp_interval, S_IRUGO | S_IWUSR, + bonding_show_lp_interval, bonding_sysfs_store_option); + +static ssize_t bonding_show_tlb_dynamic_lb(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + return sprintf(buf, "%d\n", bond->params.tlb_dynamic_lb); +} +static DEVICE_ATTR(tlb_dynamic_lb, S_IRUGO | S_IWUSR, + bonding_show_tlb_dynamic_lb, bonding_sysfs_store_option); + +static ssize_t bonding_show_packets_per_slave(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + unsigned int packets_per_slave = bond->params.packets_per_slave; + + return sprintf(buf, "%u\n", packets_per_slave); +} +static DEVICE_ATTR(packets_per_slave, S_IRUGO | S_IWUSR, + bonding_show_packets_per_slave, bonding_sysfs_store_option); + +static struct attribute *per_bond_attrs[] = { + &dev_attr_slaves.attr, + &dev_attr_mode.attr, + &dev_attr_fail_over_mac.attr, + &dev_attr_arp_validate.attr, + &dev_attr_arp_all_targets.attr, + &dev_attr_arp_interval.attr, + &dev_attr_arp_ip_target.attr, + &dev_attr_downdelay.attr, + &dev_attr_updelay.attr, + &dev_attr_lacp_rate.attr, + &dev_attr_ad_select.attr, + &dev_attr_xmit_hash_policy.attr, + &dev_attr_num_grat_arp.attr, + &dev_attr_num_unsol_na.attr, + &dev_attr_miimon.attr, + &dev_attr_primary.attr, + &dev_attr_primary_reselect.attr, + &dev_attr_use_carrier.attr, + &dev_attr_active_slave.attr, + &dev_attr_mii_status.attr, + &dev_attr_ad_aggregator.attr, + &dev_attr_ad_num_ports.attr, + &dev_attr_ad_actor_key.attr, + &dev_attr_ad_partner_key.attr, + &dev_attr_ad_partner_mac.attr, + &dev_attr_queue_id.attr, + &dev_attr_all_slaves_active.attr, + &dev_attr_resend_igmp.attr, + &dev_attr_min_links.attr, + &dev_attr_lp_interval.attr, + &dev_attr_packets_per_slave.attr, + &dev_attr_tlb_dynamic_lb.attr, + NULL, +}; + +static struct attribute_group bonding_group = { + .name = "bonding", + .attrs = per_bond_attrs, +}; + +/* Initialize sysfs. This sets up the bonding_masters file in + * /sys/class/net. + */ +int bond_create_sysfs(struct bond_net *bn) +{ + int ret; + + bn->class_attr_bonding_masters = class_attr_bonding_masters; + sysfs_attr_init(&bn->class_attr_bonding_masters.attr); + + ret = netdev_class_create_file_ns(&bn->class_attr_bonding_masters, + bn->net); + /* Permit multiple loads of the module by ignoring failures to + * create the bonding_masters sysfs file. Bonding devices + * created by second or subsequent loads of the module will + * not be listed in, or controllable by, bonding_masters, but + * will have the usual "bonding" sysfs directory. + * + * This is done to preserve backwards compatibility for + * initscripts/sysconfig, which load bonding multiple times to + * configure multiple bonding devices. + */ + if (ret == -EEXIST) { + /* Is someone being kinky and naming a device bonding_master? */ + if (__dev_get_by_name(bn->net, + class_attr_bonding_masters.attr.name)) + pr_err("network device named %s already exists in sysfs\n", + class_attr_bonding_masters.attr.name); + ret = 0; + } + + return ret; + +} + +/* Remove /sys/class/net/bonding_masters. */ +void bond_destroy_sysfs(struct bond_net *bn) +{ + netdev_class_remove_file_ns(&bn->class_attr_bonding_masters, bn->net); +} + +/* Initialize sysfs for each bond. This sets up and registers + * the 'bondctl' directory for each individual bond under /sys/class/net. + */ +void bond_prepare_sysfs_group(struct bonding *bond) +{ + bond->dev->sysfs_groups[0] = &bonding_group; +} + |