diff options
| -rw-r--r-- | net/batman-adv/main.c | 2 | ||||
| -rw-r--r-- | net/batman-adv/multicast.c | 178 | ||||
| -rw-r--r-- | net/batman-adv/packet.h | 4 | ||||
| -rw-r--r-- | net/batman-adv/send.c | 1 | ||||
| -rw-r--r-- | net/batman-adv/soft-interface.c | 2 | ||||
| -rw-r--r-- | net/batman-adv/types.h | 14 |
6 files changed, 198 insertions, 3 deletions
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 57b09fa54b14..d1183e882167 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -123,6 +123,8 @@ int batadv_mesh_init(struct net_device *soft_iface) INIT_HLIST_HEAD(&bat_priv->gw.list); #ifdef CONFIG_BATMAN_ADV_MCAST INIT_HLIST_HEAD(&bat_priv->mcast.want_all_unsnoopables_list); + INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv4_list); + INIT_HLIST_HEAD(&bat_priv->mcast.want_all_ipv6_list); #endif INIT_LIST_HEAD(&bat_priv->tt.changes_list); INIT_LIST_HEAD(&bat_priv->tt.req_list); diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c index a4804fa1ad11..8c7ca811de6e 100644 --- a/net/batman-adv/multicast.c +++ b/net/batman-adv/multicast.c @@ -361,6 +361,29 @@ static int batadv_mcast_forw_mode_check(struct batadv_priv *bat_priv, } /** + * batadv_mcast_want_all_ip_count - count nodes with unspecific mcast interest + * @bat_priv: the bat priv with all the soft interface information + * @ethhdr: ethernet header of a packet + * + * Returns the number of nodes which want all IPv4 multicast traffic if the + * given ethhdr is from an IPv4 packet or the number of nodes which want all + * IPv6 traffic if it matches an IPv6 packet. + */ +static int batadv_mcast_forw_want_all_ip_count(struct batadv_priv *bat_priv, + struct ethhdr *ethhdr) +{ + switch (ntohs(ethhdr->h_proto)) { + case ETH_P_IP: + return atomic_read(&bat_priv->mcast.num_want_all_ipv4); + case ETH_P_IPV6: + return atomic_read(&bat_priv->mcast.num_want_all_ipv6); + default: + /* we shouldn't be here... */ + return 0; + } +} + +/** * batadv_mcast_forw_tt_node_get - get a multicast tt node * @bat_priv: the bat priv with all the soft interface information * @ethhdr: the ether header containing the multicast destination @@ -377,6 +400,84 @@ batadv_mcast_forw_tt_node_get(struct batadv_priv *bat_priv, } /** + * batadv_mcast_want_forw_ipv4_node_get - get a node with an ipv4 flag + * @bat_priv: the bat priv with all the soft interface information + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 flag set and + * increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_ipv4_node_get(struct batadv_priv *bat_priv) +{ + struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_orig_node, + &bat_priv->mcast.want_all_ipv4_list, + mcast_want_all_ipv4_node) { + if (!atomic_inc_not_zero(&orig_node->refcount)) + continue; + + orig_node = tmp_orig_node; + break; + } + rcu_read_unlock(); + + return orig_node; +} + +/** + * batadv_mcast_want_forw_ipv6_node_get - get a node with an ipv6 flag + * @bat_priv: the bat priv with all the soft interface information + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_IPV6 flag set + * and increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_ipv6_node_get(struct batadv_priv *bat_priv) +{ + struct batadv_orig_node *tmp_orig_node, *orig_node = NULL; + + rcu_read_lock(); + hlist_for_each_entry_rcu(tmp_orig_node, + &bat_priv->mcast.want_all_ipv6_list, + mcast_want_all_ipv6_node) { + if (!atomic_inc_not_zero(&orig_node->refcount)) + continue; + + orig_node = tmp_orig_node; + break; + } + rcu_read_unlock(); + + return orig_node; +} + +/** + * batadv_mcast_want_forw_ip_node_get - get a node with an ipv4/ipv6 flag + * @bat_priv: the bat priv with all the soft interface information + * @ethhdr: an ethernet header to determine the protocol family from + * + * Returns an orig_node which has the BATADV_MCAST_WANT_ALL_IPV4 or + * BATADV_MCAST_WANT_ALL_IPV6 flag, depending on the provided ethhdr, set and + * increases its refcount. + */ +static struct batadv_orig_node * +batadv_mcast_forw_ip_node_get(struct batadv_priv *bat_priv, + struct ethhdr *ethhdr) +{ + switch (ntohs(ethhdr->h_proto)) { + case ETH_P_IP: + return batadv_mcast_forw_ipv4_node_get(bat_priv); + case ETH_P_IPV6: + return batadv_mcast_forw_ipv6_node_get(bat_priv); + default: + /* we shouldn't be here... */ + return NULL; + } +} + +/** * batadv_mcast_want_forw_unsnoop_node_get - get a node with an unsnoopable flag * @bat_priv: the bat priv with all the soft interface information * @@ -417,7 +518,7 @@ enum batadv_forw_mode batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, struct batadv_orig_node **orig) { - int ret, tt_count, unsnoop_count, total_count; + int ret, tt_count, ip_count, unsnoop_count, total_count; bool is_unsnoopable = false; struct ethhdr *ethhdr; @@ -431,15 +532,18 @@ batadv_mcast_forw_mode(struct batadv_priv *bat_priv, struct sk_buff *skb, tt_count = batadv_tt_global_hash_count(bat_priv, ethhdr->h_dest, BATADV_NO_FLAGS); + ip_count = batadv_mcast_forw_want_all_ip_count(bat_priv, ethhdr); unsnoop_count = !is_unsnoopable ? 0 : atomic_read(&bat_priv->mcast.num_want_all_unsnoopables); - total_count = tt_count + unsnoop_count; + total_count = tt_count + ip_count + unsnoop_count; switch (total_count) { case 1: if (tt_count) *orig = batadv_mcast_forw_tt_node_get(bat_priv, ethhdr); + else if (ip_count) + *orig = batadv_mcast_forw_ip_node_get(bat_priv, ethhdr); else if (unsnoop_count) *orig = batadv_mcast_forw_unsnoop_node_get(bat_priv); @@ -488,6 +592,72 @@ static void batadv_mcast_want_unsnoop_update(struct batadv_priv *bat_priv, } /** + * batadv_mcast_want_ipv4_update - update want-all-ipv4 counter and list + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node which multicast state might have changed of + * @mcast_flags: flags indicating the new multicast state + * + * If the BATADV_MCAST_WANT_ALL_IPV4 flag of this originator, orig, has + * toggled then this method updates counter and list accordingly. + */ +static void batadv_mcast_want_ipv4_update(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t mcast_flags) +{ + /* switched from flag unset to set */ + if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV4 && + !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4)) { + atomic_inc(&bat_priv->mcast.num_want_all_ipv4); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_add_head_rcu(&orig->mcast_want_all_ipv4_node, + &bat_priv->mcast.want_all_ipv4_list); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + /* switched from flag set to unset */ + } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) && + orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV4) { + atomic_dec(&bat_priv->mcast.num_want_all_ipv4); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_del_rcu(&orig->mcast_want_all_ipv4_node); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + } +} + +/** + * batadv_mcast_want_ipv6_update - update want-all-ipv6 counter and list + * @bat_priv: the bat priv with all the soft interface information + * @orig: the orig_node which multicast state might have changed of + * @mcast_flags: flags indicating the new multicast state + * + * If the BATADV_MCAST_WANT_ALL_IPV6 flag of this originator, orig, has + * toggled then this method updates counter and list accordingly. + */ +static void batadv_mcast_want_ipv6_update(struct batadv_priv *bat_priv, + struct batadv_orig_node *orig, + uint8_t mcast_flags) +{ + /* switched from flag unset to set */ + if (mcast_flags & BATADV_MCAST_WANT_ALL_IPV6 && + !(orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6)) { + atomic_inc(&bat_priv->mcast.num_want_all_ipv6); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_add_head_rcu(&orig->mcast_want_all_ipv6_node, + &bat_priv->mcast.want_all_ipv6_list); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + /* switched from flag set to unset */ + } else if (!(mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) && + orig->mcast_flags & BATADV_MCAST_WANT_ALL_IPV6) { + atomic_dec(&bat_priv->mcast.num_want_all_ipv6); + + spin_lock_bh(&bat_priv->mcast.want_lists_lock); + hlist_del_rcu(&orig->mcast_want_all_ipv6_node); + spin_unlock_bh(&bat_priv->mcast.want_lists_lock); + } +} + +/** * batadv_mcast_tvlv_ogm_handler_v1 - process incoming multicast tvlv container * @bat_priv: the bat priv with all the soft interface information * @orig: the orig_node of the ogm @@ -532,6 +702,8 @@ static void batadv_mcast_tvlv_ogm_handler_v1(struct batadv_priv *bat_priv, mcast_flags = *(uint8_t *)tvlv_value; batadv_mcast_want_unsnoop_update(bat_priv, orig, mcast_flags); + batadv_mcast_want_ipv4_update(bat_priv, orig, mcast_flags); + batadv_mcast_want_ipv6_update(bat_priv, orig, mcast_flags); orig->mcast_flags = mcast_flags; } @@ -571,4 +743,6 @@ void batadv_mcast_purge_orig(struct batadv_orig_node *orig) atomic_dec(&bat_priv->mcast.num_disabled); batadv_mcast_want_unsnoop_update(bat_priv, orig, BATADV_NO_FLAGS); + batadv_mcast_want_ipv4_update(bat_priv, orig, BATADV_NO_FLAGS); + batadv_mcast_want_ipv6_update(bat_priv, orig, BATADV_NO_FLAGS); } diff --git a/net/batman-adv/packet.h b/net/batman-adv/packet.h index d061e26c2045..c7f6eefda681 100644 --- a/net/batman-adv/packet.h +++ b/net/batman-adv/packet.h @@ -93,9 +93,13 @@ enum batadv_icmp_packettype { * enum batadv_mcast_flags - flags for multicast capabilities and settings * @BATADV_MCAST_WANT_ALL_UNSNOOPABLES: we want all packets destined for * 224.0.0.0/24 or ff02::1 + * @BATADV_MCAST_WANT_ALL_IPV4: we want all IPv4 multicast packets + * @BATADV_MCAST_WANT_ALL_IPV6: we want all IPv6 multicast packets */ enum batadv_mcast_flags { BATADV_MCAST_WANT_ALL_UNSNOOPABLES = BIT(0), + BATADV_MCAST_WANT_ALL_IPV4 = BIT(1), + BATADV_MCAST_WANT_ALL_IPV6 = BIT(2), }; /* tt data subtypes */ diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c index 8bee5e8536b7..3d64ed20c393 100644 --- a/net/batman-adv/send.c +++ b/net/batman-adv/send.c @@ -27,6 +27,7 @@ #include "originator.h" #include "network-coding.h" #include "fragmentation.h" +#include "multicast.h" static void batadv_send_outstanding_bcast_packet(struct work_struct *work); diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index db6fecaddb9c..744a59b85e15 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -711,6 +711,8 @@ static int batadv_softif_init_late(struct net_device *dev) atomic_set(&bat_priv->multicast_mode, 1); atomic_set(&bat_priv->mcast.num_disabled, 0); atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0); + atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0); + atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0); #endif atomic_set(&bat_priv->gw_mode, BATADV_GW_MODE_OFF); atomic_set(&bat_priv->gw_sel_class, 20); diff --git a/net/batman-adv/types.h b/net/batman-adv/types.h index 1a674cb19553..d4b923c7229c 100644 --- a/net/batman-adv/types.h +++ b/net/batman-adv/types.h @@ -207,6 +207,8 @@ struct batadv_orig_bat_iv { * @mcast_flags: multicast flags announced by the orig node * @mcast_want_all_unsnoop_node: a list node for the * mcast.want_all_unsnoopables list + * @mcast_want_all_ipv4_node: a list node for the mcast.want_all_ipv4 list + * @mcast_want_all_ipv6_node: a list node for the mcast.want_all_ipv6 list * @capabilities: announced capabilities of this originator * @capa_initialized: bitfield to remember whether a capability was initialized * @last_ttvn: last seen translation table version number @@ -252,6 +254,8 @@ struct batadv_orig_node { #ifdef CONFIG_BATMAN_ADV_MCAST uint8_t mcast_flags; struct hlist_node mcast_want_all_unsnoopables_node; + struct hlist_node mcast_want_all_ipv4_node; + struct hlist_node mcast_want_all_ipv6_node; #endif uint8_t capabilities; uint8_t capa_initialized; @@ -624,21 +628,29 @@ struct batadv_priv_dat { * @mla_list: list of multicast addresses we are currently announcing via TT * @want_all_unsnoopables_list: a list of orig_nodes wanting all unsnoopable * multicast traffic + * @want_all_ipv4_list: a list of orig_nodes wanting all IPv4 multicast traffic + * @want_all_ipv6_list: a list of orig_nodes wanting all IPv6 multicast traffic * @flags: the flags we have last sent in our mcast tvlv * @enabled: whether the multicast tvlv is currently enabled * @num_disabled: number of nodes that have no mcast tvlv * @num_want_all_unsnoopables: number of nodes wanting unsnoopable IP traffic + * @num_want_all_ipv4: counter for items in want_all_ipv4_list + * @num_want_all_ipv6: counter for items in want_all_ipv6_list * @want_lists_lock: lock for protecting modifications to mcast want lists * (traversals are rcu-locked) */ struct batadv_priv_mcast { struct hlist_head mla_list; struct hlist_head want_all_unsnoopables_list; + struct hlist_head want_all_ipv4_list; + struct hlist_head want_all_ipv6_list; uint8_t flags; bool enabled; atomic_t num_disabled; atomic_t num_want_all_unsnoopables; - /* protects want_all_unsnoopables_list */ + atomic_t num_want_all_ipv4; + atomic_t num_want_all_ipv6; + /* protects want_all_{unsnoopables,ipv4,ipv6}_list */ spinlock_t want_lists_lock; }; #endif |