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bpf: convert sockmap field attach_bpf_fd2 to type

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In the initial sockmap API we provided strparser and verdict programs
using a single attach command by extending the attach API with a the
attach_bpf_fd2 field.

However, if we add other programs in the future we will be adding a
field for every new possible type, attach_bpf_fd(3,4,..). This
seems a bit clumsy for an API. So lets push the programs using two
new type fields.

   BPF_SK_SKB_STREAM_PARSER
   BPF_SK_SKB_STREAM_VERDICT

This has the advantage of having a readable name and can easily be
extended in the future.

Updates to samples and sockmap included here also generalize tests
slightly to support upcoming patch for multiple map support.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Fixes: 174a79ff95 ("bpf: sockmap with sk redirect support")
Suggested-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Fastabend
2017-08-28 07:10:04 -07:00
committed by David S. Miller
parent 901c5d2fbf
commit 464bc0fd62
13 changed files with 121 additions and 156 deletions
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12
samples/sockmap/sockmap_user.c
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@@ -256,8 +256,16 @@ int main(int argc, char **argv)
}
/* Attach programs to sockmap */
err = __bpf_prog_attach(prog_fd[0], prog_fd[1], map_fd[0],
BPF_CGROUP_SMAP_INGRESS, 0);
err = bpf_prog_attach(prog_fd[0], map_fd[0],
BPF_SK_SKB_STREAM_PARSER, 0);
if (err) {
fprintf(stderr, "ERROR: bpf_prog_attach (sockmap): %d (%s)\n",
err, strerror(errno));
return err;
}
err = bpf_prog_attach(prog_fd[1], map_fd[0],
BPF_SK_SKB_STREAM_VERDICT, 0);
if (err) {
fprintf(stderr, "ERROR: bpf_prog_attach (sockmap): %d (%s)\n",
err, strerror(errno));