// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright(c) 2004-2005 Intel Corporation. All rights reserved. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #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 = 0644, }, .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; char *buffer_clone; int ret; opt = bond_opt_get_by_name(attr->attr.name); if (WARN_ON(!opt)) return -ENOENT; buffer_clone = kstrndup(buffer, count, GFP_KERNEL); if (!buffer_clone) return -ENOMEM; ret = bond_opt_tryset_rtnl(bond, opt->id, buffer_clone); if (!ret) ret = count; kfree(buffer_clone); 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, bonding_show_updelay, bonding_sysfs_store_option); static ssize_t bonding_show_peer_notif_delay(struct device *d, struct device_attribute *attr, char *buf) { struct bonding *bond = to_bond(d); return sprintf(buf, "%d\n", bond->params.peer_notif_delay * bond->params.miimon); } static DEVICE_ATTR(peer_notif_delay, 0644, bonding_show_peer_notif_delay, 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, 0644, 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, 0644, 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, 0644, bonding_show_ad_select, bonding_sysfs_store_option); /* Show 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 DEVICE_ATTR(num_grat_arp, 0644, bonding_show_num_peer_notif, bonding_sysfs_store_option); static DEVICE_ATTR(num_unsol_na, 0644, bonding_show_num_peer_notif, bonding_sysfs_store_option); /* 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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 = netif_carrier_ok(bond->dev); return sprintf(buf, "%s\n", active ? "up" : "down"); } static DEVICE_ATTR(mii_status, 0444, 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, 0444, 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, 0444, 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 && capable(CAP_NET_ADMIN)) { 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, 0444, 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 && capable(CAP_NET_ADMIN)) { 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, 0444, 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 && capable(CAP_NET_ADMIN)) { 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, 0444, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, 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, 0644, bonding_show_packets_per_slave, bonding_sysfs_store_option); static ssize_t bonding_show_ad_actor_sys_prio(struct device *d, struct device_attribute *attr, char *buf) { struct bonding *bond = to_bond(d); if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) return sprintf(buf, "%hu\n", bond->params.ad_actor_sys_prio); return 0; } static DEVICE_ATTR(ad_actor_sys_prio, 0644, bonding_show_ad_actor_sys_prio, bonding_sysfs_store_option); static ssize_t bonding_show_ad_actor_system(struct device *d, struct device_attribute *attr, char *buf) { struct bonding *bond = to_bond(d); if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) return sprintf(buf, "%pM\n", bond->params.ad_actor_system); return 0; } static DEVICE_ATTR(ad_actor_system, 0644, bonding_show_ad_actor_system, bonding_sysfs_store_option); static ssize_t bonding_show_ad_user_port_key(struct device *d, struct device_attribute *attr, char *buf) { struct bonding *bond = to_bond(d); if (BOND_MODE(bond) == BOND_MODE_8023AD && capable(CAP_NET_ADMIN)) return sprintf(buf, "%hu\n", bond->params.ad_user_port_key); return 0; } static DEVICE_ATTR(ad_user_port_key, 0644, bonding_show_ad_user_port_key, 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_peer_notif_delay.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, &dev_attr_ad_actor_sys_prio.attr, &dev_attr_ad_actor_system.attr, &dev_attr_ad_user_port_key.attr, NULL, }; static const 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; }