This is a note to let you know that I've just added the patch titled bonding: guard ns_targets by CONFIG_IPV6 to the 5.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bonding-guard-ns_targets-by-config_ipv6.patch and it can be found in the queue-5.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 615181ea2322282d56a47f0bb032c7f244b1f60c Author: Hangbin Liu <liuhangbin@xxxxxxxxx> Date: Tue May 31 14:37:27 2022 +0800 bonding: guard ns_targets by CONFIG_IPV6 [ Upstream commit c4caa500ffebf64795d1c0f6f9d6f179b502c6b7 ] Guard ns_targets in struct bond_params by CONFIG_IPV6, which could save 256 bytes if IPv6 not configed. Also add this protection for function bond_is_ip6_target_ok() and bond_get_targets_ip6(). Remove the IS_ENABLED() check for bond_opts[] as this will make BOND_OPT_NS_TARGETS uninitialized if CONFIG_IPV6 not enabled. Add a dummy bond_option_ns_ip6_targets_set() for this situation. Fixes: 4e24be018eb9 ("bonding: add new parameter ns_targets") Signed-off-by: Hangbin Liu <liuhangbin@xxxxxxxxx> Acked-by: Jonathan Toppins <jtoppins@xxxxxxxxxx> Link: https://lore.kernel.org/r/20220531063727.224043-1-liuhangbin@xxxxxxxxx Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index b5c5196e03ee..26a6573adf0f 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -6159,7 +6159,9 @@ static int bond_check_params(struct bond_params *params) strscpy_pad(params->primary, primary, sizeof(params->primary)); memcpy(params->arp_targets, arp_target, sizeof(arp_target)); +#if IS_ENABLED(CONFIG_IPV6) memset(params->ns_targets, 0, sizeof(struct in6_addr) * BOND_MAX_NS_TARGETS); +#endif return 0; } diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c index 64f7db2627ce..1f8323ad5282 100644 --- a/drivers/net/bonding/bond_options.c +++ b/drivers/net/bonding/bond_options.c @@ -34,10 +34,8 @@ static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target); static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target); static int bond_option_arp_ip_targets_set(struct bonding *bond, const struct bond_opt_value *newval); -#if IS_ENABLED(CONFIG_IPV6) static int bond_option_ns_ip6_targets_set(struct bonding *bond, const struct bond_opt_value *newval); -#endif static int bond_option_arp_validate_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_arp_all_targets_set(struct bonding *bond, @@ -299,7 +297,6 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = { .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_arp_ip_targets_set }, -#if IS_ENABLED(CONFIG_IPV6) [BOND_OPT_NS_TARGETS] = { .id = BOND_OPT_NS_TARGETS, .name = "ns_ip6_target", @@ -307,7 +304,6 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = { .flags = BOND_OPTFLAG_RAWVAL, .set = bond_option_ns_ip6_targets_set }, -#endif [BOND_OPT_DOWNDELAY] = { .id = BOND_OPT_DOWNDELAY, .name = "downdelay", @@ -1254,6 +1250,12 @@ static int bond_option_ns_ip6_targets_set(struct bonding *bond, return 0; } +#else +static int bond_option_ns_ip6_targets_set(struct bonding *bond, + const struct bond_opt_value *newval) +{ + return -EPERM; +} #endif static int bond_option_arp_validate_set(struct bonding *bond, diff --git a/include/net/bonding.h b/include/net/bonding.h index b14f4c0b4e9e..cb904d356e31 100644 --- a/include/net/bonding.h +++ b/include/net/bonding.h @@ -149,7 +149,9 @@ struct bond_params { struct reciprocal_value reciprocal_packets_per_slave; u16 ad_actor_sys_prio; u16 ad_user_port_key; +#if IS_ENABLED(CONFIG_IPV6) struct in6_addr ns_targets[BOND_MAX_NS_TARGETS]; +#endif /* 2 bytes of padding : see ether_addr_equal_64bits() */ u8 ad_actor_system[ETH_ALEN + 2]; @@ -503,12 +505,14 @@ static inline int bond_is_ip_target_ok(__be32 addr) return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr); } +#if IS_ENABLED(CONFIG_IPV6) static inline int bond_is_ip6_target_ok(struct in6_addr *addr) { return !ipv6_addr_any(addr) && !ipv6_addr_loopback(addr) && !ipv6_addr_is_multicast(addr); } +#endif /* Get the oldest arp which we've received on this slave for bond's * arp_targets. @@ -746,6 +750,7 @@ static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) return -1; } +#if IS_ENABLED(CONFIG_IPV6) static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip) { int i; @@ -758,6 +763,7 @@ static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr return -1; } +#endif /* exported from bond_main.c */ extern unsigned int bond_net_id;