| Message ID | 20210513132053.23445-6-linus.luessing@c0d3.blue (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: bridge: split IPv4/v6 mc router state and export for batman-adv | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | success | CCed 6 of 6 maintainers |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | success | Errors and warnings before: 3 this patch: 3 |
| netdev/kdoc | success | Errors and warnings before: 3 this patch: 3 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 69 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 3 this patch: 3 |
| netdev/header_inline | success | Link |
On Thu, May 13, 2021 at 03:20:47PM +0200, 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> Just in case this hasn't been reported yet. In next-20210514: $ git grep br_multicast_is_router net/bridge/br_input.c: br_multicast_is_router(br, skb)) { net/bridge/br_multicast.c: is_router = br_multicast_is_router(br, NULL); net/bridge/br_private.h:br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ net/bridge/br_private.h:static inline bool br_multicast_is_router(struct net_bridge *br) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Guenter
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 d970ef7..f9a381f 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -874,11 +874,40 @@ br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) { return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist); } -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) +{ + switch (br->multicast_router) { + case MDB_RTR_TYPE_PERM: + return true; + case 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); + } + fallthrough; + default: + 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 | 37 +++++++++++++++++++++++++++++++++---- 3 files changed, 37 insertions(+), 7 deletions(-)