diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h index e41eda3c71f1efbd0b6bb7845e5d670eeb55eb6c..6dc02c03bdf86bc8e4f46eb1dfd9103a4896ee01 100644 --- a/include/uapi/linux/if_bridge.h +++ b/include/uapi/linux/if_bridge.h @@ -292,4 +292,22 @@ struct br_mcast_stats { __u64 mcast_bytes[BR_MCAST_DIR_SIZE]; __u64 mcast_packets[BR_MCAST_DIR_SIZE]; }; + +/* bridge boolean options + * IMPORTANT: if adding a new option do not forget to handle + * it in br_boolopt_toggle/get and bridge sysfs + */ +enum br_boolopt_id { + BR_BOOLOPT_MAX +}; + +/* struct br_boolopt_multi - change multiple bridge boolean options + * + * @optval: new option values (bit per option) + * @optmask: options to change (bit per option) + */ +struct br_boolopt_multi { + __u32 optval; + __u32 optmask; +}; #endif /* _UAPI_LINUX_IF_BRIDGE_H */ diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index f42c069d81db353cffaf579a03722364545e26ef..d6533828123a6728958d2127ab81c2b5fa30f07f 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -288,6 +288,7 @@ enum { IFLA_BR_MCAST_IGMP_VERSION, IFLA_BR_MCAST_MLD_VERSION, IFLA_BR_VLAN_STATS_PER_PORT, + IFLA_BR_MULTI_BOOLOPT, __IFLA_BR_MAX, }; diff --git a/net/bridge/br.c b/net/bridge/br.c index 360ad66c21e95794f1eaa59d2aee599f56f3f39a..c527160c19753fc5d3d72250e4a521bcb2a5d260 100644 --- a/net/bridge/br.c +++ b/net/bridge/br.c @@ -175,6 +175,77 @@ static struct notifier_block br_switchdev_notifier = { .notifier_call = br_switchdev_event, }; +/* br_boolopt_toggle - change user-controlled boolean option + * + * @br: bridge device + * @opt: id of the option to change + * @on: new option value + * @extack: extack for error messages + * + * Changes the value of the respective boolean option to @on taking care of + * any internal option value mapping and configuration. + */ +int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, + struct netlink_ext_ack *extack) +{ + switch (opt) { + default: + /* shouldn't be called with unsupported options */ + WARN_ON(1); + break; + } + + return 0; +} + +int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt) +{ + switch (opt) { + default: + /* shouldn't be called with unsupported options */ + WARN_ON(1); + break; + } + + return 0; +} + +int br_boolopt_multi_toggle(struct net_bridge *br, + struct br_boolopt_multi *bm, + struct netlink_ext_ack *extack) +{ + unsigned long bitmap = bm->optmask; + int err = 0; + int opt_id; + + for_each_set_bit(opt_id, &bitmap, BR_BOOLOPT_MAX) { + bool on = !!(bm->optval & BIT(opt_id)); + + err = br_boolopt_toggle(br, opt_id, on, extack); + if (err) { + br_debug(br, "boolopt multi-toggle error: option: %d current: %d new: %d error: %d\n", + opt_id, br_boolopt_get(br, opt_id), on, err); + break; + } + } + + return err; +} + +void br_boolopt_multi_get(const struct net_bridge *br, + struct br_boolopt_multi *bm) +{ + u32 optval = 0; + int opt_id; + + for (opt_id = 0; opt_id < BR_BOOLOPT_MAX; opt_id++) + optval |= (br_boolopt_get(br, opt_id) << opt_id); + + bm->optval = optval; + bm->optmask = 0; +} + +/* private bridge options, controlled by the kernel */ void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on) { bool cur = !!br_opt_get(br, opt); diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c index 3345f1984542a447c776d72fc190b7c4fa3f39c8..13cd50326af2fd43797aa224d525f67d8cd880e9 100644 --- a/net/bridge/br_netlink.c +++ b/net/bridge/br_netlink.c @@ -1035,6 +1035,8 @@ static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = { [IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 }, [IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 }, [IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 }, + [IFLA_BR_MULTI_BOOLOPT] = { .type = NLA_EXACT_LEN, + .len = sizeof(struct br_boolopt_multi) }, }; static int br_changelink(struct net_device *brdev, struct nlattr *tb[], @@ -1296,6 +1298,15 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[], } #endif + if (data[IFLA_BR_MULTI_BOOLOPT]) { + struct br_boolopt_multi *bm; + + bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]); + err = br_boolopt_multi_toggle(br, bm, extack); + if (err) + return err; + } + return 0; } @@ -1374,6 +1385,7 @@ static size_t br_get_size(const struct net_device *brdev) nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */ nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */ #endif + nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */ 0; } @@ -1387,6 +1399,7 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) u32 stp_enabled = br->stp_enabled; u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1]; u8 vlan_enabled = br_vlan_enabled(br->dev); + struct br_boolopt_multi bm; u64 clockval; clockval = br_timer_value(&br->hello_timer); @@ -1403,6 +1416,7 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD)) return -EMSGSIZE; + br_boolopt_multi_get(br, &bm); if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) || nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) || nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) || @@ -1420,7 +1434,8 @@ static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev) nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) || nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED, br->topology_change_detected) || - nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr)) + nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) || + nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm)) return -EMSGSIZE; #ifdef CONFIG_BRIDGE_VLAN_FILTERING diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index bc2653738fc3f679ed7c1f19ed3ce1ab270e2af6..6d4c208fbf08de43213376e18dcb3ca5be64c11c 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -507,6 +507,14 @@ static inline int br_opt_get(const struct net_bridge *br, return test_bit(opt, &br->options); } +int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on, + struct netlink_ext_ack *extack); +int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt); +int br_boolopt_multi_toggle(struct net_bridge *br, + struct br_boolopt_multi *bm, + struct netlink_ext_ack *extack); +void br_boolopt_multi_get(const struct net_bridge *br, + struct br_boolopt_multi *bm); void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on); /* br_device.c */ diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 86f2d9cbdae378dbabec945faa356c53d56ed10a..a498bb41c9aa9b8976eb8d87f71489695cb019f2 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -59,7 +59,7 @@ #include #include -#define RTNL_MAX_TYPE 49 +#define RTNL_MAX_TYPE 50 #define RTNL_SLAVE_MAX_TYPE 36 struct rtnl_link {