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linux-next/net/bridge/br_sysfs_br.c
Florian Fainelli ae1ea84b33 net: bridge: propagate error code and extack from br_mc_disabled_update
Some Ethernet switches might only be able to support disabling multicast
snooping globally, which is an issue for example when several bridges
span the same physical device and request contradictory settings.

Propagate the return value of br_mc_disabled_update() such that this
limitation is transmitted correctly to user-space.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2021-04-14 14:32:05 -07:00

1086 lines
29 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Sysfs attributes of bridge
* Linux ethernet bridge
*
* Authors:
* Stephen Hemminger <shemminger@osdl.org>
*/
#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;
char *endp;
int err;
if (!ns_capable(dev_net(br->dev)->user_ns, CAP_NET_ADMIN))
return -EPERM;
val = simple_strtoul(buf, &endp, 0);
if (endp == buf)
return -EINVAL;
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)
{
br_fdb_flush(br);
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_router);
}
static int set_multicast_router(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
return br_multicast_set_router(br, 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_opt_get(br, BROPT_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, 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_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, 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_last_member_count);
}
static int set_last_member_count(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->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_startup_query_count);
}
static int set_startup_query_count(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->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_last_member_interval));
}
static int set_last_member_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->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_membership_interval));
}
static int set_membership_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->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_querier_interval));
}
static int set_querier_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->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_query_interval));
}
static int set_query_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_query_interval = clock_t_to_jiffies(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_query_response_interval));
}
static int set_query_response_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->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_startup_query_interval));
}
static int set_startup_query_interval(struct net_bridge *br, unsigned long val,
struct netlink_ext_ack *extack)
{
br->multicast_startup_query_interval = clock_t_to_jiffies(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_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, 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);
}