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flow_dissector: implements flow dissector BPF hook

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Adds a hook for programs of type BPF_PROG_TYPE_FLOW_DISSECTOR and
attach type BPF_FLOW_DISSECTOR that is executed in the flow dissector
path. The BPF program is per-network namespace.

Signed-off-by: Petar Penkov <ppenkov@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Petar Penkov
2018-09-14 07:46:18 -07:00
committed by Alexei Starovoitov
parent 1edb6e035e
commit d58e468b11
10 changed files with 291 additions and 3 deletions
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3
include/net/net_namespace.h
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@@ -43,6 +43,7 @@ struct ctl_table_header;
struct net_generic;
struct uevent_sock;
struct netns_ipvs;
struct bpf_prog;
#define NETDEV_HASHBITS 8
@@ -145,6 +146,8 @@ struct net {
#endif
struct net_generic __rcu *gen;
struct bpf_prog __rcu *flow_dissector_prog;
/* Note : following structs are cache line aligned */
#ifdef CONFIG_XFRM
struct netns_xfrm xfrm;