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| author | Tom Herbert <tom@herbertland.com> | 2015-06-04 09:16:46 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-06-04 15:44:31 -0700 |
| commit | b3baa0fbd02a1a9d493d8cb92ae4a4491b9e9d13 (patch) | |
| tree | e19a85590547279215e55378b5d34f76b4e07d7a | |
| parent | 1fdd512c92003cf2d671ba22753d13302bf8cd1d (diff) | |
| download | linux-b3baa0fbd02a1a9d493d8cb92ae4a4491b9e9d13.tar.bz2 | |
mpls: Add MPLS entropy label in flow_keys
In flow dissector if an MPLS header contains an entropy label this is
saved in the new keyid field of flow_keys. The entropy label is
then represented in the flow hash function input.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/flow_dissector.h | 1 | ||||
| -rw-r--r-- | net/core/flow_dissector.c | 35 |
2 files changed, 36 insertions, 0 deletions
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index 6c5e8d262607..1a8c22419936 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -118,6 +118,7 @@ enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_VLANID, /* struct flow_dissector_key_flow_tags */ FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_tags */ FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */ + FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */ FLOW_DISSECTOR_KEY_MAX, }; diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 7ddc0a7b3da5..77e22e4fc898 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -15,6 +15,7 @@ #include <linux/ppp_defs.h> #include <linux/stddef.h> #include <linux/if_ether.h> +#include <linux/mpls.h> #include <net/flow_dissector.h> #include <scsi/fc/fc_fcoe.h> @@ -288,6 +289,37 @@ ipv6: } return true; } + + case htons(ETH_P_MPLS_UC): + case htons(ETH_P_MPLS_MC): { + struct mpls_label *hdr, _hdr[2]; +mpls: + hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, + hlen, &_hdr); + if (!hdr) + return false; + + if ((ntohl(hdr[0].entry) & MPLS_LS_LABEL_MASK) == + MPLS_LABEL_ENTROPY) { + if (skb_flow_dissector_uses_key(flow_dissector, + FLOW_DISSECTOR_KEY_MPLS_ENTROPY)) { + key_keyid = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_MPLS_ENTROPY, + target_container); + key_keyid->keyid = hdr[1].entry & + htonl(MPLS_LS_LABEL_MASK); + } + + key_basic->n_proto = proto; + key_basic->ip_proto = ip_proto; + key_control->thoff = (u16)nhoff; + + return true; + } + + return true; + } + case htons(ETH_P_FCOE): key_control->thoff = (u16)(nhoff + FCOE_HEADER_LEN); /* fall through */ @@ -357,6 +389,9 @@ ipv6: case IPPROTO_IPV6: proto = htons(ETH_P_IPV6); goto ipv6; + case IPPROTO_MPLS: + proto = htons(ETH_P_MPLS_UC); + goto mpls; default: break; } |