diff options
Diffstat (limited to 'net/bridge/br_sysfs_br.c')
| -rw-r--r-- | net/bridge/br_sysfs_br.c | 1088 |
1 files changed, 1088 insertions, 0 deletions
diff --git a/net/bridge/br_sysfs_br.c b/net/bridge/br_sysfs_br.c new file mode 100644 index 000000000..ea7335422 --- /dev/null +++ b/net/bridge/br_sysfs_br.c @@ -0,0 +1,1088 @@ +// 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; + 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); +} |