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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
Download Patch File Download Diff File Expand all files Collapse all files
samples/sockmap/sockmap_kern.c
+2 -4
View File
@@ -82,8 +82,7 @@ int bpf_sockmap(struct bpf_sock_ops *skops)
if (lport == 10000) {
ret = 1;
err = bpf_sock_map_update(skops, &sock_map, &ret,
BPF_NOEXIST,
BPF_SOCKMAP_STRPARSER);
BPF_NOEXIST);
bpf_printk("passive(%i -> %i) map ctx update err: %d\n",
lport, bpf_ntohl(rport), err);
}
@@ -95,8 +94,7 @@ int bpf_sockmap(struct bpf_sock_ops *skops)
if (bpf_ntohl(rport) == 10001) {
ret = 10;
err = bpf_sock_map_update(skops, &sock_map, &ret,
BPF_NOEXIST,
BPF_SOCKMAP_STRPARSER);
BPF_NOEXIST);
bpf_printk("active(%i -> %i) map ctx update err: %d\n",
lport, bpf_ntohl(rport), err);
}
samples/sockmap/sockmap_user.c
+10 -2
View File
@@ -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));