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net: bridge: mcast: support for IGMPV3/MLDv2 CHANGE_TO_INCLUDE/EXCLUDE report
In order to process IGMPV3/MLDv2 CHANGE_TO_INCLUDE/EXCLUDE report types we need new helpers which allow us to mark entries based on their timer state and to query only marked entries. v3: add IPv6/MLDv2 support, fix other_query checks v2: directly do flag bit operations Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Nikolay Aleksandrov
Jakub Kicinski
parent
e6231bca6a
commit
5bf1e00b68
@ -1244,6 +1244,86 @@ static int __grp_src_delete_marked(struct net_bridge_port_group *pg)
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return deleted;
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}
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static void __grp_src_query_marked_and_rexmit(struct net_bridge_port_group *pg)
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{
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struct bridge_mcast_other_query *other_query = NULL;
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struct net_bridge *br = pg->port->br;
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u32 lmqc = br->multicast_last_member_count;
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unsigned long lmqt, lmi, now = jiffies;
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struct net_bridge_group_src *ent;
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if (!netif_running(br->dev) ||
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!br_opt_get(br, BROPT_MULTICAST_ENABLED))
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return;
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if (pg->addr.proto == htons(ETH_P_IP))
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other_query = &br->ip4_other_query;
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#if IS_ENABLED(CONFIG_IPV6)
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else
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other_query = &br->ip6_other_query;
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#endif
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lmqt = now + br_multicast_lmqt(br);
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hlist_for_each_entry(ent, &pg->src_list, node) {
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if (ent->flags & BR_SGRP_F_SEND) {
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ent->flags &= ~BR_SGRP_F_SEND;
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if (ent->timer.expires > lmqt) {
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if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
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other_query &&
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!timer_pending(&other_query->timer))
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ent->src_query_rexmit_cnt = lmqc;
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mod_timer(&ent->timer, lmqt);
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}
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}
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}
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if (!br_opt_get(br, BROPT_MULTICAST_QUERIER) ||
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!other_query || timer_pending(&other_query->timer))
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return;
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__br_multicast_send_query(br, pg->port, pg, &pg->addr,
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&pg->addr, true, 1, NULL);
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lmi = now + br->multicast_last_member_interval;
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if (!timer_pending(&pg->rexmit_timer) ||
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time_after(pg->rexmit_timer.expires, lmi))
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mod_timer(&pg->rexmit_timer, lmi);
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}
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static void __grp_send_query_and_rexmit(struct net_bridge_port_group *pg)
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{
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struct bridge_mcast_other_query *other_query = NULL;
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struct net_bridge *br = pg->port->br;
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unsigned long now = jiffies, lmi;
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if (!netif_running(br->dev) ||
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!br_opt_get(br, BROPT_MULTICAST_ENABLED))
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return;
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if (pg->addr.proto == htons(ETH_P_IP))
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other_query = &br->ip4_other_query;
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#if IS_ENABLED(CONFIG_IPV6)
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else
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other_query = &br->ip6_other_query;
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#endif
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if (br_opt_get(br, BROPT_MULTICAST_QUERIER) &&
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other_query && !timer_pending(&other_query->timer)) {
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lmi = now + br->multicast_last_member_interval;
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pg->grp_query_rexmit_cnt = br->multicast_last_member_count - 1;
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__br_multicast_send_query(br, pg->port, pg, &pg->addr,
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&pg->addr, false, 0, NULL);
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if (!timer_pending(&pg->rexmit_timer) ||
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time_after(pg->rexmit_timer.expires, lmi))
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mod_timer(&pg->rexmit_timer, lmi);
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}
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if (pg->filter_mode == MCAST_EXCLUDE &&
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(!timer_pending(&pg->timer) ||
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time_after(pg->timer.expires, now + br_multicast_lmqt(br))))
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mod_timer(&pg->timer, now + br_multicast_lmqt(br));
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}
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/* State Msg type New state Actions
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* INCLUDE (A) IS_IN (B) INCLUDE (A+B) (B)=GMI
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* INCLUDE (A) ALLOW (B) INCLUDE (A+B) (B)=GMI
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@ -1373,6 +1453,216 @@ static bool br_multicast_isexc(struct net_bridge_port_group *pg,
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return changed;
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}
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/* State Msg type New state Actions
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* INCLUDE (A) TO_IN (B) INCLUDE (A+B) (B)=GMI
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* Send Q(G,A-B)
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*/
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static bool __grp_src_toin_incl(struct net_bridge_port_group *pg,
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void *srcs, u32 nsrcs, size_t src_size)
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{
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struct net_bridge *br = pg->port->br;
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u32 src_idx, to_send = pg->src_ents;
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struct net_bridge_group_src *ent;
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unsigned long now = jiffies;
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bool changed = false;
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struct br_ip src_ip;
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hlist_for_each_entry(ent, &pg->src_list, node)
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ent->flags |= BR_SGRP_F_SEND;
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memset(&src_ip, 0, sizeof(src_ip));
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src_ip.proto = pg->addr.proto;
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for (src_idx = 0; src_idx < nsrcs; src_idx++) {
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memcpy(&src_ip.u, srcs, src_size);
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ent = br_multicast_find_group_src(pg, &src_ip);
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if (ent) {
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ent->flags &= ~BR_SGRP_F_SEND;
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to_send--;
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} else {
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ent = br_multicast_new_group_src(pg, &src_ip);
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if (ent)
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changed = true;
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}
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if (ent)
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mod_timer(&ent->timer, now + br_multicast_gmi(br));
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srcs += src_size;
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}
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if (to_send)
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__grp_src_query_marked_and_rexmit(pg);
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return changed;
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}
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/* State Msg type New state Actions
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* EXCLUDE (X,Y) TO_IN (A) EXCLUDE (X+A,Y-A) (A)=GMI
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* Send Q(G,X-A)
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* Send Q(G)
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*/
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static bool __grp_src_toin_excl(struct net_bridge_port_group *pg,
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void *srcs, u32 nsrcs, size_t src_size)
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{
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struct net_bridge *br = pg->port->br;
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u32 src_idx, to_send = pg->src_ents;
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struct net_bridge_group_src *ent;
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unsigned long now = jiffies;
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bool changed = false;
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struct br_ip src_ip;
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hlist_for_each_entry(ent, &pg->src_list, node)
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if (timer_pending(&ent->timer))
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ent->flags |= BR_SGRP_F_SEND;
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memset(&src_ip, 0, sizeof(src_ip));
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src_ip.proto = pg->addr.proto;
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for (src_idx = 0; src_idx < nsrcs; src_idx++) {
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memcpy(&src_ip.u, srcs, src_size);
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ent = br_multicast_find_group_src(pg, &src_ip);
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if (ent) {
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if (timer_pending(&ent->timer)) {
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ent->flags &= ~BR_SGRP_F_SEND;
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to_send--;
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}
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} else {
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ent = br_multicast_new_group_src(pg, &src_ip);
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if (ent)
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changed = true;
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}
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if (ent)
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mod_timer(&ent->timer, now + br_multicast_gmi(br));
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srcs += src_size;
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}
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if (to_send)
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__grp_src_query_marked_and_rexmit(pg);
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__grp_send_query_and_rexmit(pg);
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return changed;
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}
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static bool br_multicast_toin(struct net_bridge_port_group *pg,
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void *srcs, u32 nsrcs, size_t src_size)
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{
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bool changed = false;
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switch (pg->filter_mode) {
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case MCAST_INCLUDE:
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changed = __grp_src_toin_incl(pg, srcs, nsrcs, src_size);
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break;
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case MCAST_EXCLUDE:
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changed = __grp_src_toin_excl(pg, srcs, nsrcs, src_size);
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break;
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}
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return changed;
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}
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/* State Msg type New state Actions
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* INCLUDE (A) TO_EX (B) EXCLUDE (A*B,B-A) (B-A)=0
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* Delete (A-B)
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* Send Q(G,A*B)
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* Group Timer=GMI
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*/
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static void __grp_src_toex_incl(struct net_bridge_port_group *pg,
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void *srcs, u32 nsrcs, size_t src_size)
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{
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struct net_bridge_group_src *ent;
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u32 src_idx, to_send = 0;
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struct br_ip src_ip;
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hlist_for_each_entry(ent, &pg->src_list, node)
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ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
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memset(&src_ip, 0, sizeof(src_ip));
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src_ip.proto = pg->addr.proto;
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for (src_idx = 0; src_idx < nsrcs; src_idx++) {
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memcpy(&src_ip.u, srcs, src_size);
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ent = br_multicast_find_group_src(pg, &src_ip);
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if (ent) {
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ent->flags = (ent->flags & ~BR_SGRP_F_DELETE) |
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BR_SGRP_F_SEND;
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to_send++;
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} else {
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br_multicast_new_group_src(pg, &src_ip);
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}
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srcs += src_size;
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}
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__grp_src_delete_marked(pg);
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if (to_send)
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__grp_src_query_marked_and_rexmit(pg);
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}
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/* State Msg type New state Actions
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* EXCLUDE (X,Y) TO_EX (A) EXCLUDE (A-Y,Y*A) (A-X-Y)=Group Timer
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* Delete (X-A)
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* Delete (Y-A)
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* Send Q(G,A-Y)
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* Group Timer=GMI
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*/
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static bool __grp_src_toex_excl(struct net_bridge_port_group *pg,
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void *srcs, u32 nsrcs, size_t src_size)
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{
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struct net_bridge_group_src *ent;
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u32 src_idx, to_send = 0;
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bool changed = false;
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struct br_ip src_ip;
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hlist_for_each_entry(ent, &pg->src_list, node)
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ent->flags = (ent->flags & ~BR_SGRP_F_SEND) | BR_SGRP_F_DELETE;
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memset(&src_ip, 0, sizeof(src_ip));
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src_ip.proto = pg->addr.proto;
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for (src_idx = 0; src_idx < nsrcs; src_idx++) {
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memcpy(&src_ip.u, srcs, src_size);
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ent = br_multicast_find_group_src(pg, &src_ip);
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if (ent) {
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ent->flags &= ~BR_SGRP_F_DELETE;
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} else {
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ent = br_multicast_new_group_src(pg, &src_ip);
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if (ent) {
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mod_timer(&ent->timer, pg->timer.expires);
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changed = true;
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}
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}
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if (ent && timer_pending(&ent->timer)) {
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ent->flags |= BR_SGRP_F_SEND;
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to_send++;
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}
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srcs += src_size;
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}
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if (__grp_src_delete_marked(pg))
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changed = true;
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if (to_send)
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__grp_src_query_marked_and_rexmit(pg);
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return changed;
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}
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static bool br_multicast_toex(struct net_bridge_port_group *pg,
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void *srcs, u32 nsrcs, size_t src_size)
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{
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struct net_bridge *br = pg->port->br;
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bool changed = false;
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switch (pg->filter_mode) {
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case MCAST_INCLUDE:
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__grp_src_toex_incl(pg, srcs, nsrcs, src_size);
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changed = true;
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break;
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case MCAST_EXCLUDE:
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__grp_src_toex_excl(pg, srcs, nsrcs, src_size);
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break;
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}
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pg->filter_mode = MCAST_EXCLUDE;
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mod_timer(&pg->timer, jiffies + br_multicast_gmi(br));
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return changed;
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}
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static struct net_bridge_port_group *
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br_multicast_find_port(struct net_bridge_mdb_entry *mp,
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struct net_bridge_port *p,
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@ -1478,6 +1768,14 @@ static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
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changed = br_multicast_isexc(pg, grec->grec_src, nsrcs,
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sizeof(__be32));
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break;
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case IGMPV3_CHANGE_TO_INCLUDE:
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changed = br_multicast_toin(pg, grec->grec_src, nsrcs,
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sizeof(__be32));
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break;
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case IGMPV3_CHANGE_TO_EXCLUDE:
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changed = br_multicast_toex(pg, grec->grec_src, nsrcs,
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sizeof(__be32));
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break;
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}
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if (changed)
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br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
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@ -1592,6 +1890,14 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
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changed = br_multicast_isexc(pg, grec->grec_src, nsrcs,
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sizeof(struct in6_addr));
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break;
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case MLD2_CHANGE_TO_INCLUDE:
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changed = br_multicast_toin(pg, grec->grec_src, nsrcs,
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sizeof(struct in6_addr));
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break;
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case MLD2_CHANGE_TO_EXCLUDE:
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changed = br_multicast_toex(pg, grec->grec_src, nsrcs,
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sizeof(struct in6_addr));
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break;
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}
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if (changed)
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br_mdb_notify(br->dev, mdst, pg, RTM_NEWMDB);
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