| Message ID | 20210509194509.10849-6-linus.luessing@c0d3.blue |
|---|---|
| State | Superseded |
| Headers | show |
| Series | net: bridge: split IPv4/v6 mc router state and export for batman-adv | expand |
On 09/05/2021 22:45, Linus Lüssing wrote: > In preparation for the upcoming split of multicast router state into > their IPv4 and IPv6 variants make br_multicast_is_router() protocol > family aware. > > Note that for now br_ip6_multicast_is_router() uses the currently still > common ip4_mc_router_timer for now. It will be renamed to > ip6_mc_router_timer later when the split is performed. > > While at it also renames the "1" and "2" constants in > br_multicast_is_router() to the MDB_RTR_TYPE_TEMP_QUERY and > MDB_RTR_TYPE_PERM enums. > > Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> > --- > net/bridge/br_input.c | 2 +- > net/bridge/br_multicast.c | 5 +++-- > net/bridge/br_private.h | 36 ++++++++++++++++++++++++++++++++---- > 3 files changed, 36 insertions(+), 7 deletions(-) > Minor comment below, but either way: Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com> > diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c > index 8875e95..1f50630 100644 > --- a/net/bridge/br_input.c > +++ b/net/bridge/br_input.c > @@ -132,7 +132,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb > if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && > br_multicast_querier_exists(br, eth_hdr(skb), mdst)) { > if ((mdst && mdst->host_joined) || > - br_multicast_is_router(br)) { > + br_multicast_is_router(br, skb)) { > local_rcv = true; > br->dev->stats.multicast++; > } > diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c > index 7edbbc9..048b5b9 100644 > --- a/net/bridge/br_multicast.c > +++ b/net/bridge/br_multicast.c > @@ -1391,7 +1391,8 @@ static void br_multicast_local_router_expired(struct timer_list *t) > spin_lock(&br->multicast_lock); > if (br->multicast_router == MDB_RTR_TYPE_DISABLED || > br->multicast_router == MDB_RTR_TYPE_PERM || > - timer_pending(&br->ip4_mc_router_timer)) > + br_ip4_multicast_is_router(br) || > + br_ip6_multicast_is_router(br)) > goto out; > > br_mc_router_state_change(br, false); > @@ -3622,7 +3623,7 @@ bool br_multicast_router(const struct net_device *dev) > bool is_router; > > spin_lock_bh(&br->multicast_lock); > - is_router = br_multicast_is_router(br); > + is_router = br_multicast_is_router(br, NULL); > spin_unlock_bh(&br->multicast_lock); > return is_router; > } > diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h > index 26e91d2..ac5ca5b 100644 > --- a/net/bridge/br_private.h > +++ b/net/bridge/br_private.h > @@ -864,11 +864,39 @@ static inline bool br_group_is_l2(const struct br_ip *group) > #define mlock_dereference(X, br) \ > rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) > > -static inline bool br_multicast_is_router(struct net_bridge *br) > +static inline bool br_ip4_multicast_is_router(struct net_bridge *br) > { > - return br->multicast_router == 2 || > - (br->multicast_router == 1 && > - timer_pending(&br->ip4_mc_router_timer)); > + return timer_pending(&br->ip4_mc_router_timer); > +} > + > +static inline bool br_ip6_multicast_is_router(struct net_bridge *br) > +{ > +#if IS_ENABLED(CONFIG_IPV6) > + return timer_pending(&br->ip4_mc_router_timer); > +#else > + return false; > +#endif > +} > + > +static inline bool > +br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb) > +{ > + if (br->multicast_router == MDB_RTR_TYPE_PERM) > + return true; > + > + if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { > + if (skb) { > + if (skb->protocol == htons(ETH_P_IP)) > + return br_ip4_multicast_is_router(br); > + else if (skb->protocol == htons(ETH_P_IPV6)) > + return br_ip6_multicast_is_router(br); > + } else { > + return br_ip4_multicast_is_router(br) || > + br_ip6_multicast_is_router(br); > + } > + } Personally I'd prefer using a switch statement for br->multicast_router. > + > + return false; > } > > static inline bool >
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 8875e95..1f50630 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -132,7 +132,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && br_multicast_querier_exists(br, eth_hdr(skb), mdst)) { if ((mdst && mdst->host_joined) || - br_multicast_is_router(br)) { + br_multicast_is_router(br, skb)) { local_rcv = true; br->dev->stats.multicast++; } diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 7edbbc9..048b5b9 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1391,7 +1391,8 @@ static void br_multicast_local_router_expired(struct timer_list *t) spin_lock(&br->multicast_lock); if (br->multicast_router == MDB_RTR_TYPE_DISABLED || br->multicast_router == MDB_RTR_TYPE_PERM || - timer_pending(&br->ip4_mc_router_timer)) + br_ip4_multicast_is_router(br) || + br_ip6_multicast_is_router(br)) goto out; br_mc_router_state_change(br, false); @@ -3622,7 +3623,7 @@ bool br_multicast_router(const struct net_device *dev) bool is_router; spin_lock_bh(&br->multicast_lock); - is_router = br_multicast_is_router(br); + is_router = br_multicast_is_router(br, NULL); spin_unlock_bh(&br->multicast_lock); return is_router; } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 26e91d2..ac5ca5b 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -864,11 +864,39 @@ static inline bool br_group_is_l2(const struct br_ip *group) #define mlock_dereference(X, br) \ rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock)) -static inline bool br_multicast_is_router(struct net_bridge *br) +static inline bool br_ip4_multicast_is_router(struct net_bridge *br) { - return br->multicast_router == 2 || - (br->multicast_router == 1 && - timer_pending(&br->ip4_mc_router_timer)); + return timer_pending(&br->ip4_mc_router_timer); +} + +static inline bool br_ip6_multicast_is_router(struct net_bridge *br) +{ +#if IS_ENABLED(CONFIG_IPV6) + return timer_pending(&br->ip4_mc_router_timer); +#else + return false; +#endif +} + +static inline bool +br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb) +{ + if (br->multicast_router == MDB_RTR_TYPE_PERM) + return true; + + if (br->multicast_router == MDB_RTR_TYPE_TEMP_QUERY) { + if (skb) { + if (skb->protocol == htons(ETH_P_IP)) + return br_ip4_multicast_is_router(br); + else if (skb->protocol == htons(ETH_P_IPV6)) + return br_ip6_multicast_is_router(br); + } else { + return br_ip4_multicast_is_router(br) || + br_ip6_multicast_is_router(br); + } + } + + return false; } static inline bool
In preparation for the upcoming split of multicast router state into their IPv4 and IPv6 variants make br_multicast_is_router() protocol family aware. Note that for now br_ip6_multicast_is_router() uses the currently still common ip4_mc_router_timer for now. It will be renamed to ip6_mc_router_timer later when the split is performed. While at it also renames the "1" and "2" constants in br_multicast_is_router() to the MDB_RTR_TYPE_TEMP_QUERY and MDB_RTR_TYPE_PERM enums. Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> --- net/bridge/br_input.c | 2 +- net/bridge/br_multicast.c | 5 +++-- net/bridge/br_private.h | 36 ++++++++++++++++++++++++++++++++---- 3 files changed, 36 insertions(+), 7 deletions(-)