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Date: Thu, 30 Aug 2012 15:30:46 +0300
From: "Michael S. Tsirkin" <mst@...hat.com>
To: Vlad Yasevich <vyasevic@...hat.com>
Cc: netdev@...r.kernel.org
Subject: Re: [RFC PATCH bridge 3/5] bridge: Add vlan id to multicast groups
On Thu, Aug 23, 2012 at 03:29:53PM -0400, Vlad Yasevich wrote:
> Add vlan_id to multicasts groups so that we know which vlan each group belongs
> to and can correctly forward to appropriate vlan.
>
> Signed-off-by: Vlad Yasevich <vyasevic@...hat.com>
> ---
> net/bridge/br_multicast.c | 64 +++++++++++++++++++++++++++++++--------------
> net/bridge/br_private.h | 1 +
> 2 files changed, 45 insertions(+), 20 deletions(-)
>
> diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
> index 2417434..2976a2b 100644
> --- a/net/bridge/br_multicast.c
> +++ b/net/bridge/br_multicast.c
> @@ -51,6 +51,8 @@ static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
> {
> if (a->proto != b->proto)
> return 0;
> + if (a->vid != b->vid)
> + return 0;
> switch (a->proto) {
> case htons(ETH_P_IP):
> return a->u.ip4 == b->u.ip4;
> @@ -62,16 +64,19 @@ static inline int br_ip_equal(const struct br_ip *a, const struct br_ip *b)
> return 0;
> }
>
> -static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip)
> +static inline int __br_ip4_hash(struct net_bridge_mdb_htable *mdb, __be32 ip,
> + __u16 vid)
> {
> - return jhash_1word(mdb->secret, (__force u32)ip) & (mdb->max - 1);
> + return jhash_2words((__force u32)ip, vid, mdb->secret) & (mdb->max - 1);
> }
>
> #if IS_ENABLED(CONFIG_IPV6)
> static inline int __br_ip6_hash(struct net_bridge_mdb_htable *mdb,
> - const struct in6_addr *ip)
> + const struct in6_addr *ip,
> + __u16 vid)
> {
> - return jhash2((__force u32 *)ip->s6_addr32, 4, mdb->secret) & (mdb->max - 1);
> + u32 addr = *(__force u32 *)ip->s6_addr32;
> + return jhash_2words(addr, vid, mdb->secret) & (mdb->max - 1);
> }
> #endif
>
> @@ -80,10 +85,10 @@ static inline int br_ip_hash(struct net_bridge_mdb_htable *mdb,
> {
> switch (ip->proto) {
> case htons(ETH_P_IP):
> - return __br_ip4_hash(mdb, ip->u.ip4);
> + return __br_ip4_hash(mdb, ip->u.ip4, ip->vid);
> #if IS_ENABLED(CONFIG_IPV6)
> case htons(ETH_P_IPV6):
> - return __br_ip6_hash(mdb, &ip->u.ip6);
> + return __br_ip6_hash(mdb, &ip->u.ip6, ip->vid);
> #endif
> }
> return 0;
> @@ -113,24 +118,27 @@ static struct net_bridge_mdb_entry *br_mdb_ip_get(
> }
>
> static struct net_bridge_mdb_entry *br_mdb_ip4_get(
> - struct net_bridge_mdb_htable *mdb, __be32 dst)
> + struct net_bridge_mdb_htable *mdb, __be32 dst, __u16 vlan_tci)
> {
> struct br_ip br_dst;
>
> br_dst.u.ip4 = dst;
> br_dst.proto = htons(ETH_P_IP);
> + br_dst.vid = (vlan_tci & VLAN_VID_MASK);
() around value not needed.
Same in all cases below, I am not repeating
this comment.
>
> return br_mdb_ip_get(mdb, &br_dst);
> }
>
> #if IS_ENABLED(CONFIG_IPV6)
> static struct net_bridge_mdb_entry *br_mdb_ip6_get(
> - struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst)
> + struct net_bridge_mdb_htable *mdb, const struct in6_addr *dst,
> + __u16 vlan_tci)
> {
> struct br_ip br_dst;
>
> br_dst.u.ip6 = *dst;
> br_dst.proto = htons(ETH_P_IPV6);
> + br_dst.vid = vlan_tci & VLAN_VID_MASK;
>
> return br_mdb_ip_get(mdb, &br_dst);
> }
> @@ -692,7 +700,8 @@ err:
>
> static int br_ip4_multicast_add_group(struct net_bridge *br,
> struct net_bridge_port *port,
> - __be32 group)
> + __be32 group,
> + __u16 vlan_tci)
> {
> struct br_ip br_group;
>
> @@ -701,6 +710,7 @@ static int br_ip4_multicast_add_group(struct net_bridge *br,
>
> br_group.u.ip4 = group;
> br_group.proto = htons(ETH_P_IP);
> + br_group.vid = vlan_tci & VLAN_VID_MASK;
>
> return br_multicast_add_group(br, port, &br_group);
> }
> @@ -708,7 +718,8 @@ static int br_ip4_multicast_add_group(struct net_bridge *br,
> #if IS_ENABLED(CONFIG_IPV6)
> static int br_ip6_multicast_add_group(struct net_bridge *br,
> struct net_bridge_port *port,
> - const struct in6_addr *group)
> + const struct in6_addr *group,
> + __u16 vlan_tci)
> {
> struct br_ip br_group;
>
> @@ -717,6 +728,7 @@ static int br_ip6_multicast_add_group(struct net_bridge *br,
>
> br_group.u.ip6 = *group;
> br_group.proto = htons(ETH_P_IPV6);
> + br_group.vid = vlan_tci & VLAN_VID_MASK;
>
> return br_multicast_add_group(br, port, &br_group);
> }
> @@ -928,7 +940,8 @@ static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
> continue;
> }
>
> - err = br_ip4_multicast_add_group(br, port, group);
> + err = br_ip4_multicast_add_group(br, port, group,
> + skb->vlan_tci);
Pls align continuation line at (, same as other
code in this file. Same in all cases below, I am not repeating
this comment.
> if (err)
> break;
> }
> @@ -988,7 +1001,8 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
> continue;
> }
>
> - err = br_ip6_multicast_add_group(br, port, &grec->grec_mca);
> + err = br_ip6_multicast_add_group(br, port, &grec->grec_mca,
> + skb->vlan_tci);
> if (!err)
> break;
> }
> @@ -1106,7 +1120,8 @@ static int br_ip4_multicast_query(struct net_bridge *br,
> if (!group)
> goto out;
>
> - mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group);
> + mp = br_mdb_ip4_get(mlock_dereference(br->mdb, br), group,
> + skb->vlan_tci);
> if (!mp)
> goto out;
>
> @@ -1178,7 +1193,8 @@ static int br_ip6_multicast_query(struct net_bridge *br,
> if (!group)
> goto out;
>
> - mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group);
> + mp = br_mdb_ip6_get(mlock_dereference(br->mdb, br), group,
> + skb->vlan_tci);
> if (!mp)
> goto out;
>
> @@ -1262,7 +1278,8 @@ out:
>
> static void br_ip4_multicast_leave_group(struct net_bridge *br,
> struct net_bridge_port *port,
> - __be32 group)
> + __be32 group,
> + __u16 vlan_tci)
> {
> struct br_ip br_group;
>
> @@ -1271,6 +1288,7 @@ static void br_ip4_multicast_leave_group(struct net_bridge *br,
>
> br_group.u.ip4 = group;
> br_group.proto = htons(ETH_P_IP);
> + br_group.vid = (vlan_tci & VLAN_VID_MASK);
>
> br_multicast_leave_group(br, port, &br_group);
> }
> @@ -1278,7 +1296,8 @@ static void br_ip4_multicast_leave_group(struct net_bridge *br,
> #if IS_ENABLED(CONFIG_IPV6)
> static void br_ip6_multicast_leave_group(struct net_bridge *br,
> struct net_bridge_port *port,
> - const struct in6_addr *group)
> + const struct in6_addr *group,
> + __u16 vlan_tci)
> {
> struct br_ip br_group;
>
> @@ -1287,6 +1306,7 @@ static void br_ip6_multicast_leave_group(struct net_bridge *br,
>
> br_group.u.ip6 = *group;
> br_group.proto = htons(ETH_P_IPV6);
> + br_group.vid = (vlan_tci & VLAN_VID_MASK);
>
> br_multicast_leave_group(br, port, &br_group);
> }
> @@ -1369,7 +1389,8 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
> case IGMP_HOST_MEMBERSHIP_REPORT:
> case IGMPV2_HOST_MEMBERSHIP_REPORT:
> BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
> - err = br_ip4_multicast_add_group(br, port, ih->group);
> + err = br_ip4_multicast_add_group(br, port, ih->group,
> + skb2->vlan_tci);
> break;
> case IGMPV3_HOST_MEMBERSHIP_REPORT:
> err = br_ip4_multicast_igmp3_report(br, port, skb2);
> @@ -1378,7 +1399,8 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
> err = br_ip4_multicast_query(br, port, skb2);
> break;
> case IGMP_HOST_LEAVE_MESSAGE:
> - br_ip4_multicast_leave_group(br, port, ih->group);
> + br_ip4_multicast_leave_group(br, port, ih->group,
> + skb2->vlan_tci);
> break;
> }
>
> @@ -1498,7 +1520,8 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
> }
> mld = (struct mld_msg *)skb_transport_header(skb2);
> BR_INPUT_SKB_CB(skb)->mrouters_only = 1;
> - err = br_ip6_multicast_add_group(br, port, &mld->mld_mca);
> + err = br_ip6_multicast_add_group(br, port, &mld->mld_mca,
> + skb2->vlan_tci);
> break;
> }
> case ICMPV6_MLD2_REPORT:
> @@ -1515,7 +1538,8 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
> goto out;
> }
> mld = (struct mld_msg *)skb_transport_header(skb2);
> - br_ip6_multicast_leave_group(br, port, &mld->mld_mca);
> + br_ip6_multicast_leave_group(br, port, &mld->mld_mca,
> + skb2->vlan_tci);
> }
> }
>
> diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
> index 921b927..b6c56ab 100644
> --- a/net/bridge/br_private.h
> +++ b/net/bridge/br_private.h
> @@ -61,6 +61,7 @@ struct br_ip
> #endif
> } u;
> __be16 proto;
> + __u16 vid;
> };
>
> struct net_bridge_fdb_entry
> --
> 1.7.7.6
>
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