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authorKuniyuki Iwashima <kuniyu@amazon.co.jp>2021-06-12 15:32:21 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2021-06-15 19:01:06 +0300
commite061047684af63f2d4f1338ec73140f6e29eb59f (patch)
treef92af62f23d54eafb55e36f4f79a2fbaeeea0fdf /tools
parentd4f2c86b2b7e2e606e0868b38c8c6c49cc193a8e (diff)
downloadlinux-e061047684af63f2d4f1338ec73140f6e29eb59f.tar.xz
bpf: Support BPF_FUNC_get_socket_cookie() for BPF_PROG_TYPE_SK_REUSEPORT.
We will call sock_reuseport.prog for socket migration in the next commit, so the eBPF program has to know which listener is closing to select a new listener. We can currently get a unique ID of each listener in the userspace by calling bpf_map_lookup_elem() for BPF_MAP_TYPE_REUSEPORT_SOCKARRAY map. This patch makes the pointer of sk available in sk_reuseport_md so that we can get the ID by BPF_FUNC_get_socket_cookie() in the eBPF program. Suggested-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.co.jp> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/netdev/20201119001154.kapwihc2plp4f7zc@kafai-mbp.dhcp.thefacebook.com/ Link: https://lore.kernel.org/bpf/20210612123224.12525-9-kuniyu@amazon.co.jp
Diffstat (limited to 'tools')
-rw-r--r--tools/include/uapi/linux/bpf.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 2c1ba70abbf1..f3b72588442b 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -5416,6 +5416,7 @@ struct sk_reuseport_md {
__u32 ip_protocol; /* IP protocol. e.g. IPPROTO_TCP, IPPROTO_UDP */
__u32 bind_inany; /* Is sock bound to an INANY address? */
__u32 hash; /* A hash of the packet 4 tuples */
+ __bpf_md_ptr(struct bpf_sock *, sk);
};
#define BPF_TAG_SIZE 8