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| author | David S. Miller <davem@davemloft.net> | 2019-12-24 22:24:45 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-12-24 22:24:45 -0800 |
| commit | ab5d4bb2b819bd09a1eb1a9a0069e22c1ae4aeb0 (patch) | |
| tree | bb0d67371aaf2e2fcdb80ef8ee59b82d7b6ff83a /net/core/skbuff.c | |
| parent | ac80010fc94eb0680d9a432b639583bd7ac29066 (diff) | |
| parent | f66b53fdbb22ced1a323b22b9de84a61aacd8d18 (diff) | |
Merge branch 'ovs-mpls-actions'
Martin Varghese says:
====================
New openvswitch MPLS actions for layer 2 tunnelling
The existing PUSH MPLS action inserts MPLS header between ethernet header
and the IP header. Though this behaviour is fine for L3 VPN where an IP
packet is encapsulated inside a MPLS tunnel, it does not suffice the L2
VPN (l2 tunnelling) requirements. In L2 VPN the MPLS header should
encapsulate the ethernet packet.
The new mpls action ADD_MPLS inserts MPLS header at the start of the
packet or at the start of the l3 header depending on the value of l3 tunnel
flag in the ADD_MPLS arguments.
POP_MPLS action is extended to support ethertype 0x6558
OVS userspace changes -
---------------------
Encap & Decap ovs actions are extended to support MPLS packet type. The encap & decap
adds and removes MPLS header at the start of packet as depicted below.
Actions - encap(mpls(ether_type=0x8847)),encap(ethernet)
Incoming packet -> | ETH | IP | Payload |
1 Actions - encap(mpls(ether_type=0x8847)) [Kernel action - add_mpls:0x8847]
Outgoing packet -> | MPLS | ETH | Payload|
2 Actions - encap(ethernet) [ Kernel action - push_eth ]
Outgoing packet -> | ETH | MPLS | ETH | Payload|
Decapsulation:
Incoming packet -> | ETH | MPLS | ETH | IP | Payload |
Actions - decap(),decap(packet_type(ns=0,type=0)
1 Actions - decap() [Kernel action - pop_eth)
Outgoing packet -> | MPLS | ETH | IP | Payload|
2 Actions - decap(packet_type(ns=0,type=0) [Kernel action - pop_mpls:0x6558]
Outgoing packet -> | ETH | IP | Payload
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/skbuff.c')
| -rw-r--r-- | net/core/skbuff.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 973a71f4bc89..44b0894d8ae1 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -5472,12 +5472,15 @@ static void skb_mod_eth_type(struct sk_buff *skb, struct ethhdr *hdr, } /** - * skb_mpls_push() - push a new MPLS header after the mac header + * skb_mpls_push() - push a new MPLS header after mac_len bytes from start of + * the packet * * @skb: buffer * @mpls_lse: MPLS label stack entry to push * @mpls_proto: ethertype of the new MPLS header (expects 0x8847 or 0x8848) * @mac_len: length of the MAC header + * @ethernet: flag to indicate if the resulting packet after skb_mpls_push is + * ethernet * * Expects skb->data at mac header. * @@ -5501,7 +5504,7 @@ int skb_mpls_push(struct sk_buff *skb, __be32 mpls_lse, __be16 mpls_proto, return err; if (!skb->inner_protocol) { - skb_set_inner_network_header(skb, mac_len); + skb_set_inner_network_header(skb, skb_network_offset(skb)); skb_set_inner_protocol(skb, skb->protocol); } @@ -5510,6 +5513,7 @@ int skb_mpls_push(struct sk_buff *skb, __be32 mpls_lse, __be16 mpls_proto, mac_len); skb_reset_mac_header(skb); skb_set_network_header(skb, mac_len); + skb_reset_mac_len(skb); lse = mpls_hdr(skb); lse->label_stack_entry = mpls_lse; @@ -5529,7 +5533,7 @@ EXPORT_SYMBOL_GPL(skb_mpls_push); * @skb: buffer * @next_proto: ethertype of header after popped MPLS header * @mac_len: length of the MAC header - * @ethernet: flag to indicate if ethernet header is present in packet + * @ethernet: flag to indicate if the packet is ethernet * * Expects skb->data at mac header. * |