bpf: export bpf_sock for BPF_PROG_TYPE_SOCK_OPS prog type
authorStanislav Fomichev <sdf@google.com>
Wed, 12 Jun 2019 17:30:38 +0000 (10:30 -0700)
committerDaniel Borkmann <daniel@iogearbox.net>
Fri, 14 Jun 2019 23:21:57 +0000 (01:21 +0200)
commit1314ef561102e534e14cb1d37f89f5c1df0b2ea7
treeb3b3c8aeeb19fc1874bee52dc616d152f9d48af9
parentfb85c4a730af221339c1dde1a434b73da0dfc3ed
bpf: export bpf_sock for BPF_PROG_TYPE_SOCK_OPS prog type

And let it use bpf_sk_storage_{get,delete} helpers to access socket
storage. Kernel context (struct bpf_sock_ops_kern) already has sk
member, so I just expose it to the BPF hooks. I use
PTR_TO_SOCKET_OR_NULL and return NULL in !is_fullsock case.

I also export bpf_tcp_sock to make it possible to access tcp socket stats.

Cc: Martin Lau <kafai@fb.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
include/uapi/linux/bpf.h
net/core/filter.c