// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Sysfs attributes of bridge
* Linux ethernet bridge
*
* Authors:
* Stephen Hemminger <[email protected]>
*/
#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
#include <linux/rtnetlink.h>
#include <linux/spinlock.h>
#include <linux/times.h>
#include <linux/sched/signal.h>
#include "br_private.h"
/* IMPORTANT: new bridge options must be added with netlink support only
* please do not add new sysfs entries
*/
#define to_bridge(cd) ((struct net_bridge *)netdev_priv(to_net_dev(cd)))
/*
* Common code for storing bridge parameters.
*/
static ssize_t store_bridge_parm(struct device *d,
const char *buf, size_t len,
int (*set)(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack))
{
struct net_bridge *br = to_bridge(d);
struct netlink_ext_ack extack = {0};
unsigned long val;
int err;
if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
return -EPERM;
err = kstrtoul(buf, 0, &val);
if (err != 0)
return err;
if (!rtnl_trylock())
return restart_syscall();
err = (*set)(br, val, &extack);
if (!err)
netdev_state_change(br->dev);
if (extack._msg) {
if (err)
br_err(br, "%s\n", extack._msg);
else
br_warn(br, "%s\n", extack._msg);
}
rtnl_unlock();
return err ? err : len;
}
static ssize_t forward_delay_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->forward_delay));
}
static int set_forward_delay(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_set_forward_delay(br, val);
}
static ssize_t forward_delay_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_forward_delay);
}
static DEVICE_ATTR_RW(forward_delay);
static ssize_t hello_time_show(struct device *d, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%lu\n",
jiffies_to_clock_t(to_bridge(d)->hello_time));
}
static int set_hello_time(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_set_hello_time(br, val);
}
static ssize_t hello_time_store(struct device *d,
struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_hello_time);
}
static DEVICE_ATTR_RW(hello_time);
static ssize_t max_age_show(struct device *d, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%lu\n",
jiffies_to_clock_t(to_bridge(d)->max_age));
}
static int set_max_age(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_set_max_age(br, val);
}
static ssize_t max_age_store(struct device *d, struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_max_age);
}
static DEVICE_ATTR_RW(max_age);
static ssize_t ageing_time_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%lu\n", jiffies_to_clock_t(br->ageing_time));
}
static int set_ageing_time(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_set_ageing_time(br, val);
}
static ssize_t ageing_time_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_ageing_time);
}
static DEVICE_ATTR_RW(ageing_time);
static ssize_t stp_state_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br->stp_enabled);
}
static int set_stp_state(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_stp_set_enabled(br, val, extack);
}
static ssize_t stp_state_store(struct device *d,
struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_stp_state);
}
static DEVICE_ATTR_RW(stp_state);
static ssize_t group_fwd_mask_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%#x\n", br->group_fwd_mask);
}
static int set_group_fwd_mask(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
if (val & BR_GROUPFWD_RESTRICTED)
return -EINVAL;
br->group_fwd_mask = val;
return 0;
}
static ssize_t group_fwd_mask_store(struct device *d,
struct device_attribute *attr,
const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_group_fwd_mask);
}
static DEVICE_ATTR_RW(group_fwd_mask);
static ssize_t priority_show(struct device *d, struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n",
(br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]);
}
static int set_priority(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_stp_set_bridge_priority(br, (u16) val);
return 0;
}
static ssize_t priority_store(struct device *d, struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_priority);
}
static DEVICE_ATTR_RW(priority);
static ssize_t root_id_show(struct device *d, struct device_attribute *attr,
char *buf)
{
return br_show_bridge_id(buf, &to_bridge(d)->designated_root);
}
static DEVICE_ATTR_RO(root_id);
static ssize_t bridge_id_show(struct device *d, struct device_attribute *attr,
char *buf)
{
return br_show_bridge_id(buf, &to_bridge(d)->bridge_id);
}
static DEVICE_ATTR_RO(bridge_id);
static ssize_t root_port_show(struct device *d, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "%d\n", to_bridge(d)->root_port);
}
static DEVICE_ATTR_RO(root_port);
static ssize_t root_path_cost_show(struct device *d,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", to_bridge(d)->root_path_cost);
}
static DEVICE_ATTR_RO(root_path_cost);
static ssize_t topology_change_show(struct device *d,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%d\n", to_bridge(d)->topology_change);
}
static DEVICE_ATTR_RO(topology_change);
static ssize_t topology_change_detected_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br->topology_change_detected);
}
static DEVICE_ATTR_RO(topology_change_detected);
static ssize_t hello_timer_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%ld\n", br_timer_value(&br->hello_timer));
}
static DEVICE_ATTR_RO(hello_timer);
static ssize_t tcn_timer_show(struct device *d, struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%ld\n", br_timer_value(&br->tcn_timer));
}
static DEVICE_ATTR_RO(tcn_timer);
static ssize_t topology_change_timer_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%ld\n", br_timer_value(&br->topology_change_timer));
}
static DEVICE_ATTR_RO(topology_change_timer);
static ssize_t gc_timer_show(struct device *d, struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%ld\n", br_timer_value(&br->gc_work.timer));
}
static DEVICE_ATTR_RO(gc_timer);
static ssize_t group_addr_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%pM\n", br->group_addr);
}
static ssize_t group_addr_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct net_bridge *br = to_bridge(d);
u8 new_addr[6];
if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
return -EPERM;
if (!mac_pton(buf, new_addr))
return -EINVAL;
if (!is_link_local_ether_addr(new_addr))
return -EINVAL;
if (new_addr[5] == 1 || /* 802.3x Pause address */
new_addr[5] == 2 || /* 802.3ad Slow protocols */
new_addr[5] == 3) /* 802.1X PAE address */
return -EINVAL;
if (!rtnl_trylock())
return restart_syscall();
spin_lock_bh(&br->lock);
ether_addr_copy(br->group_addr, new_addr);
spin_unlock_bh(&br->lock);
br_opt_toggle(br, BROPT_GROUP_ADDR_SET, true);
br_recalculate_fwd_mask(br);
netdev_state_change(br->dev);
rtnl_unlock();
return len;
}
static DEVICE_ATTR_RW(group_addr);
static int set_flush(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
struct net_bridge_fdb_flush_desc desc = {
.flags_mask = BIT(BR_FDB_STATIC)
};
br_fdb_flush(br, &desc);
return 0;
}
static ssize_t flush_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_flush);
}
static DEVICE_ATTR_WO(flush);
static ssize_t no_linklocal_learn_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br_boolopt_get(br, BR_BOOLOPT_NO_LL_LEARN));
}
static int set_no_linklocal_learn(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_boolopt_toggle(br, BR_BOOLOPT_NO_LL_LEARN, !!val, extack);
}
static ssize_t no_linklocal_learn_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_no_linklocal_learn);
}
static DEVICE_ATTR_RW(no_linklocal_learn);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
static ssize_t multicast_router_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br->multicast_ctx.multicast_router);
}
static int set_multicast_router(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_multicast_set_router(&br->multicast_ctx, val);
}
static ssize_t multicast_router_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_multicast_router);
}
static DEVICE_ATTR_RW(multicast_router);
static ssize_t multicast_snooping_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br_opt_get(br, BROPT_MULTICAST_ENABLED));
}
static ssize_t multicast_snooping_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, br_multicast_toggle);
}
static DEVICE_ATTR_RW(multicast_snooping);
static ssize_t multicast_query_use_ifaddr_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n",
br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR));
}
static int set_query_use_ifaddr(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_opt_toggle(br, BROPT_MULTICAST_QUERY_USE_IFADDR, !!val);
return 0;
}
static ssize_t
multicast_query_use_ifaddr_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_query_use_ifaddr);
}
static DEVICE_ATTR_RW(multicast_query_use_ifaddr);
static ssize_t multicast_querier_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br->multicast_ctx.multicast_querier);
}
static int set_multicast_querier(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_multicast_set_querier(&br->multicast_ctx, val);
}
static ssize_t multicast_querier_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_multicast_querier);
}
static DEVICE_ATTR_RW(multicast_querier);
static ssize_t hash_elasticity_show(struct device *d,
struct device_attribute *attr, char *buf)
{
return sprintf(buf, "%u\n", RHT_ELASTICITY);
}
static int set_elasticity(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
/* 16 is RHT_ELASTICITY */
NL_SET_ERR_MSG_MOD(extack,
"the hash_elasticity option has been deprecated and is always 16");
return 0;
}
static ssize_t hash_elasticity_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_elasticity);
}
static DEVICE_ATTR_RW(hash_elasticity);
static ssize_t hash_max_show(struct device *d, struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br->hash_max);
}
static int set_hash_max(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->hash_max = val;
return 0;
}
static ssize_t hash_max_store(struct device *d, struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_hash_max);
}
static DEVICE_ATTR_RW(hash_max);
static ssize_t multicast_igmp_version_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br->multicast_ctx.multicast_igmp_version);
}
static int set_multicast_igmp_version(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_multicast_set_igmp_version(&br->multicast_ctx, val);
}
static ssize_t multicast_igmp_version_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_multicast_igmp_version);
}
static DEVICE_ATTR_RW(multicast_igmp_version);
static ssize_t multicast_last_member_count_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br->multicast_ctx.multicast_last_member_count);
}
static int set_last_member_count(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_ctx.multicast_last_member_count = val;
return 0;
}
static ssize_t multicast_last_member_count_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_last_member_count);
}
static DEVICE_ATTR_RW(multicast_last_member_count);
static ssize_t multicast_startup_query_count_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br->multicast_ctx.multicast_startup_query_count);
}
static int set_startup_query_count(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_ctx.multicast_startup_query_count = val;
return 0;
}
static ssize_t multicast_startup_query_count_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_startup_query_count);
}
static DEVICE_ATTR_RW(multicast_startup_query_count);
static ssize_t multicast_last_member_interval_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%lu\n",
jiffies_to_clock_t(br->multicast_ctx.multicast_last_member_interval));
}
static int set_last_member_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_ctx.multicast_last_member_interval = clock_t_to_jiffies(val);
return 0;
}
static ssize_t multicast_last_member_interval_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_last_member_interval);
}
static DEVICE_ATTR_RW(multicast_last_member_interval);
static ssize_t multicast_membership_interval_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%lu\n",
jiffies_to_clock_t(br->multicast_ctx.multicast_membership_interval));
}
static int set_membership_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_ctx.multicast_membership_interval = clock_t_to_jiffies(val);
return 0;
}
static ssize_t multicast_membership_interval_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_membership_interval);
}
static DEVICE_ATTR_RW(multicast_membership_interval);
static ssize_t multicast_querier_interval_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%lu\n",
jiffies_to_clock_t(br->multicast_ctx.multicast_querier_interval));
}
static int set_querier_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_ctx.multicast_querier_interval = clock_t_to_jiffies(val);
return 0;
}
static ssize_t multicast_querier_interval_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_querier_interval);
}
static DEVICE_ATTR_RW(multicast_querier_interval);
static ssize_t multicast_query_interval_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%lu\n",
jiffies_to_clock_t(br->multicast_ctx.multicast_query_interval));
}
static int set_query_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_multicast_set_query_intvl(&br->multicast_ctx, val);
return 0;
}
static ssize_t multicast_query_interval_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_query_interval);
}
static DEVICE_ATTR_RW(multicast_query_interval);
static ssize_t multicast_query_response_interval_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(
buf, "%lu\n",
jiffies_to_clock_t(br->multicast_ctx.multicast_query_response_interval));
}
static int set_query_response_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_ctx.multicast_query_response_interval = clock_t_to_jiffies(val);
return 0;
}
static ssize_t multicast_query_response_interval_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_query_response_interval);
}
static DEVICE_ATTR_RW(multicast_query_response_interval);
static ssize_t multicast_startup_query_interval_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(
buf, "%lu\n",
jiffies_to_clock_t(br->multicast_ctx.multicast_startup_query_interval));
}
static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_multicast_set_startup_query_intvl(&br->multicast_ctx, val);
return 0;
}
static ssize_t multicast_startup_query_interval_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_startup_query_interval);
}
static DEVICE_ATTR_RW(multicast_startup_query_interval);
static ssize_t multicast_stats_enabled_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n",
br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED));
}
static int set_stats_enabled(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!val);
return 0;
}
static ssize_t multicast_stats_enabled_store(struct device *d,
struct device_attribute *attr,
const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_stats_enabled);
}
static DEVICE_ATTR_RW(multicast_stats_enabled);
#if IS_ENABLED(CONFIG_IPV6)
static ssize_t multicast_mld_version_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br->multicast_ctx.multicast_mld_version);
}
static int set_multicast_mld_version(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_multicast_set_mld_version(&br->multicast_ctx, val);
}
static ssize_t multicast_mld_version_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_multicast_mld_version);
}
static DEVICE_ATTR_RW(multicast_mld_version);
#endif
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
static ssize_t nf_call_iptables_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IPTABLES));
}
static int set_nf_call_iptables(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
return 0;
}
static ssize_t nf_call_iptables_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_nf_call_iptables);
}
static DEVICE_ATTR_RW(nf_call_iptables);
static ssize_t nf_call_ip6tables_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_IP6TABLES));
}
static int set_nf_call_ip6tables(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
return 0;
}
static ssize_t nf_call_ip6tables_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_nf_call_ip6tables);
}
static DEVICE_ATTR_RW(nf_call_ip6tables);
static ssize_t nf_call_arptables_show(
struct device *d, struct device_attribute *attr, char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br_opt_get(br, BROPT_NF_CALL_ARPTABLES));
}
static int set_nf_call_arptables(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
return 0;
}
static ssize_t nf_call_arptables_store(
struct device *d, struct device_attribute *attr, const char *buf,
size_t len)
{
return store_bridge_parm(d, buf, len, set_nf_call_arptables);
}
static DEVICE_ATTR_RW(nf_call_arptables);
#endif
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
static ssize_t vlan_filtering_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br_opt_get(br, BROPT_VLAN_ENABLED));
}
static ssize_t vlan_filtering_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, br_vlan_filter_toggle);
}
static DEVICE_ATTR_RW(vlan_filtering);
static ssize_t vlan_protocol_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%#06x\n", ntohs(br->vlan_proto));
}
static ssize_t vlan_protocol_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, br_vlan_set_proto);
}
static DEVICE_ATTR_RW(vlan_protocol);
static ssize_t default_pvid_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%d\n", br->default_pvid);
}
static ssize_t default_pvid_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, br_vlan_set_default_pvid);
}
static DEVICE_ATTR_RW(default_pvid);
static ssize_t vlan_stats_enabled_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_ENABLED));
}
static int set_vlan_stats_enabled(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_vlan_set_stats(br, val);
}
static ssize_t vlan_stats_enabled_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_vlan_stats_enabled);
}
static DEVICE_ATTR_RW(vlan_stats_enabled);
static ssize_t vlan_stats_per_port_show(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct net_bridge *br = to_bridge(d);
return sprintf(buf, "%u\n", br_opt_get(br, BROPT_VLAN_STATS_PER_PORT));
}
static int set_vlan_stats_per_port(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_vlan_set_stats_per_port(br, val);
}
static ssize_t vlan_stats_per_port_store(struct device *d,
struct device_attribute *attr,
const char *buf, size_t len)
{
return store_bridge_parm(d, buf, len, set_vlan_stats_per_port);
}
static DEVICE_ATTR_RW(vlan_stats_per_port);
#endif
static struct attribute *bridge_attrs[] = {
&dev_attr_forward_delay.attr,
&dev_attr_hello_time.attr,
&dev_attr_max_age.attr,
&dev_attr_ageing_time.attr,
&dev_attr_stp_state.attr,
&dev_attr_group_fwd_mask.attr,
&dev_attr_priority.attr,
&dev_attr_bridge_id.attr,
&dev_attr_root_id.attr,
&dev_attr_root_path_cost.attr,
&dev_attr_root_port.attr,
&dev_attr_topology_change.attr,
&dev_attr_topology_change_detected.attr,
&dev_attr_hello_timer.attr,
&dev_attr_tcn_timer.attr,
&dev_attr_topology_change_timer.attr,
&dev_attr_gc_timer.attr,
&dev_attr_group_addr.attr,
&dev_attr_flush.attr,
&dev_attr_no_linklocal_learn.attr,
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
&dev_attr_multicast_router.attr,
&dev_attr_multicast_snooping.attr,
&dev_attr_multicast_querier.attr,
&dev_attr_multicast_query_use_ifaddr.attr,
&dev_attr_hash_elasticity.attr,
&dev_attr_hash_max.attr,
&dev_attr_multicast_last_member_count.attr,
&dev_attr_multicast_startup_query_count.attr,
&dev_attr_multicast_last_member_interval.attr,
&dev_attr_multicast_membership_interval.attr,
&dev_attr_multicast_querier_interval.attr,
&dev_attr_multicast_query_interval.attr,
&dev_attr_multicast_query_response_interval.attr,
&dev_attr_multicast_startup_query_interval.attr,
&dev_attr_multicast_stats_enabled.attr,
&dev_attr_multicast_igmp_version.attr,
#if IS_ENABLED(CONFIG_IPV6)
&dev_attr_multicast_mld_version.attr,
#endif
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
&dev_attr_nf_call_iptables.attr,
&dev_attr_nf_call_ip6tables.attr,
&dev_attr_nf_call_arptables.attr,
#endif
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
&dev_attr_vlan_filtering.attr,
&dev_attr_vlan_protocol.attr,
&dev_attr_default_pvid.attr,
&dev_attr_vlan_stats_enabled.attr,
&dev_attr_vlan_stats_per_port.attr,
#endif
NULL
};
static const struct attribute_group bridge_group = {
.name = SYSFS_BRIDGE_ATTR,
.attrs = bridge_attrs,
};
/*
* Export the forwarding information table as a binary file
* The records are struct __fdb_entry.
*
* Returns the number of bytes read.
*/
static ssize_t brforward_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *bin_attr,
char *buf, loff_t off, size_t count)
{
struct device *dev = kobj_to_dev(kobj);
struct net_bridge *br = to_bridge(dev);
int n;
/* must read whole records */
if (off % sizeof(struct __fdb_entry) != 0)
return -EINVAL;
n = br_fdb_fillbuf(br, buf,
count / sizeof(struct __fdb_entry),
off / sizeof(struct __fdb_entry));
if (n > 0)
n *= sizeof(struct __fdb_entry);
return n;
}
static struct bin_attribute bridge_forward = {
.attr = { .name = SYSFS_BRIDGE_FDB,
.mode = 0444, },
.read = brforward_read,
};
/*
* Add entries in sysfs onto the existing network class device
* for the bridge.
* Adds a attribute group "bridge" containing tuning parameters.
* Binary attribute containing the forward table
* Sub directory to hold links to interfaces.
*
* Note: the ifobj exists only to be a subdirectory
* to hold links. The ifobj exists in same data structure
* as it's parent the bridge so reference counting works.
*/
int br_sysfs_addbr(struct net_device *dev)
{
struct kobject *brobj = &dev->dev.kobj;
struct net_bridge *br = netdev_priv(dev);
int err;
err = sysfs_create_group(brobj, &bridge_group);
if (err) {
pr_info("%s: can't create group %s/%s\n",
__func__, dev->name, bridge_group.name);
goto out1;
}
err = sysfs_create_bin_file(brobj, &bridge_forward);
if (err) {
pr_info("%s: can't create attribute file %s/%s\n",
__func__, dev->name, bridge_forward.attr.name);
goto out2;
}
br->ifobj = kobject_create_and_add(SYSFS_BRIDGE_PORT_SUBDIR, brobj);
if (!br->ifobj) {
pr_info("%s: can't add kobject (directory) %s/%s\n",
__func__, dev->name, SYSFS_BRIDGE_PORT_SUBDIR);
err = -ENOMEM;
goto out3;
}
return 0;
out3:
sysfs_remove_bin_file(&dev->dev.kobj, &bridge_forward);
out2:
sysfs_remove_group(&dev->dev.kobj, &bridge_group);
out1:
return err;
}
void br_sysfs_delbr(struct net_device *dev)
{
struct kobject *kobj = &dev->dev.kobj;
struct net_bridge *br = netdev_priv(dev);
kobject_put(br->ifobj);
sysfs_remove_bin_file(kobj, &bridge_forward);
sysfs_remove_group(kobj, &bridge_group);
}
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