diff options
| author | Petr Machata <petrm@nvidia.com> | 2025-06-17 00:44:19 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-06-17 18:18:46 -0700 |
| commit | f8337efa4ff5a27e6c1d4e384166413eecd21a65 (patch) | |
| tree | e2ca0b9e67801f92044a422714987e134a03d362 /include/net | |
| parent | net: ipv6: Add ip6_mr_output() (diff) | |
| download | linux-f8337efa4ff5a27e6c1d4e384166413eecd21a65.tar.gz linux-f8337efa4ff5a27e6c1d4e384166413eecd21a65.zip | |
vxlan: Support MC routing in the underlay
Locally-generated MC packets have so far not been subject to MC routing.
Instead an MC-enabled installation would maintain the MC routing tables,
and separately from that the list of interfaces to send packets to as part
of the VXLAN FDB and MDB.
In a previous patch, a ip_mr_output() and ip6_mr_output() routines were
added for IPv4 and IPv6. All locally generated MC traffic is now passed
through these functions. For reasons of backward compatibility, an SKB
(IPCB / IP6CB) flag guards the actual MC routing.
This patch adds logic to set the flag, and the UAPI to enable the behavior.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/d899655bb7e9b2521ee8c793e67056b9fd02ba12.1750113335.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/vxlan.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/net/vxlan.h b/include/net/vxlan.h index e2f7ca045d3e..0ee50785f4f1 100644 --- a/include/net/vxlan.h +++ b/include/net/vxlan.h @@ -332,6 +332,7 @@ struct vxlan_dev { #define VXLAN_F_VNIFILTER 0x20000 #define VXLAN_F_MDB 0x40000 #define VXLAN_F_LOCALBYPASS 0x80000 +#define VXLAN_F_MC_ROUTE 0x100000 /* Flags that are used in the receive path. These flags must match in * order for a socket to be shareable @@ -353,7 +354,9 @@ struct vxlan_dev { VXLAN_F_UDP_ZERO_CSUM6_RX | \ VXLAN_F_COLLECT_METADATA | \ VXLAN_F_VNIFILTER | \ - VXLAN_F_LOCALBYPASS) + VXLAN_F_LOCALBYPASS | \ + VXLAN_F_MC_ROUTE | \ + 0) struct net_device *vxlan_dev_create(struct net *net, const char *name, u8 name_assign_type, struct vxlan_config *conf); |