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| author | Benjamin LaHaise <benjamin.lahaise@netronome.com> | 2017-04-22 16:52:46 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-24 14:30:46 -0400 |
| commit | 029c1ecbb2429cf08c7bd2de81e929f81feea914 (patch) | |
| tree | 089ec0aa72c309409049b892c49cb867fb3732b1 | |
| parent | 3ec21b6580792c9890e265a46488afbe7dabc5d6 (diff) | |
| download | linux-0-day-029c1ecbb2429cf08c7bd2de81e929f81feea914.tar.gz linux-0-day-029c1ecbb2429cf08c7bd2de81e929f81feea914.tar.xz | |
flow_dissector: add mpls support (v2)
Add support for parsing MPLS flows to the flow dissector in preparation for
adding MPLS match support to cls_flower.
Signed-off-by: Benjamin LaHaise <benjamin.lahaise@netronome.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Simon Horman <simon.horman@netronome.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@mellanox.com>
Cc: Eric Dumazet <jhs@mojatatu.com>
Cc: Hadar Hen Zion <hadarh@mellanox.com>
Cc: Gao Feng <fgao@ikuai8.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/mpls.h | 5 | ||||
| -rw-r--r-- | include/net/flow_dissector.h | 8 | ||||
| -rw-r--r-- | net/core/flow_dissector.c | 25 |
3 files changed, 35 insertions, 3 deletions
diff --git a/include/linux/mpls.h b/include/linux/mpls.h index 9999145bc1900..384fb22b6c436 100644 --- a/include/linux/mpls.h +++ b/include/linux/mpls.h @@ -3,4 +3,9 @@ #include <uapi/linux/mpls.h> +#define MPLS_TTL_MASK (MPLS_LS_TTL_MASK >> MPLS_LS_TTL_SHIFT) +#define MPLS_BOS_MASK (MPLS_LS_S_MASK >> MPLS_LS_S_SHIFT) +#define MPLS_TC_MASK (MPLS_LS_TC_MASK >> MPLS_LS_TC_SHIFT) +#define MPLS_LABEL_MASK (MPLS_LS_LABEL_MASK >> MPLS_LS_LABEL_SHIFT) + #endif /* _LINUX_MPLS_H */ diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index ac9703018a3a6..8d21d448daa9d 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -41,6 +41,13 @@ struct flow_dissector_key_vlan { u16 padding; }; +struct flow_dissector_key_mpls { + u32 mpls_ttl:8, + mpls_bos:1, + mpls_tc:3, + mpls_label:20; +}; + struct flow_dissector_key_keyid { __be32 keyid; }; @@ -169,6 +176,7 @@ enum flow_dissector_key_id { FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */ FLOW_DISSECTOR_KEY_ENC_CONTROL, /* struct flow_dissector_key_control */ FLOW_DISSECTOR_KEY_ENC_PORTS, /* struct flow_dissector_key_ports */ + FLOW_DISSECTOR_KEY_MPLS, /* struct flow_dissector_key_mpls */ FLOW_DISSECTOR_KEY_MAX, }; diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index c9cf425303f84..28d94bce4df8e 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -126,9 +126,11 @@ __skb_flow_dissect_mpls(const struct sk_buff *skb, { struct flow_dissector_key_keyid *key_keyid; struct mpls_label *hdr, _hdr[2]; + u32 entry, label; if (!dissector_uses_key(flow_dissector, - FLOW_DISSECTOR_KEY_MPLS_ENTROPY)) + FLOW_DISSECTOR_KEY_MPLS_ENTROPY) && + !dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_MPLS)) return FLOW_DISSECT_RET_OUT_GOOD; hdr = __skb_header_pointer(skb, nhoff, sizeof(_hdr), data, @@ -136,8 +138,25 @@ __skb_flow_dissect_mpls(const struct sk_buff *skb, if (!hdr) return FLOW_DISSECT_RET_OUT_BAD; - if ((ntohl(hdr[0].entry) & MPLS_LS_LABEL_MASK) >> - MPLS_LS_LABEL_SHIFT == MPLS_LABEL_ENTROPY) { + entry = ntohl(hdr[0].entry); + label = (entry & MPLS_LS_LABEL_MASK) >> MPLS_LS_LABEL_SHIFT; + + if (dissector_uses_key(flow_dissector, FLOW_DISSECTOR_KEY_MPLS)) { + struct flow_dissector_key_mpls *key_mpls; + + key_mpls = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_MPLS, + target_container); + key_mpls->mpls_label = label; + key_mpls->mpls_ttl = (entry & MPLS_LS_TTL_MASK) + >> MPLS_LS_TTL_SHIFT; + key_mpls->mpls_tc = (entry & MPLS_LS_TC_MASK) + >> MPLS_LS_TC_SHIFT; + key_mpls->mpls_bos = (entry & MPLS_LS_S_MASK) + >> MPLS_LS_S_SHIFT; + } + + if (label == MPLS_LABEL_ENTROPY) { key_keyid = skb_flow_dissector_target(flow_dissector, FLOW_DISSECTOR_KEY_MPLS_ENTROPY, target_container); |