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authorCong Wang <cong.wang@bytedance.com>2021-03-31 05:32:31 +0300
committerAlexei Starovoitov <ast@kernel.org>2021-04-01 20:56:14 +0300
commit8a59f9d1e3d4340659fdfee8879dc09a6f2546e1 (patch)
tree22d59950e745c697e01c05b82ed67d7a9536bd88 /net/ipv4/udp.c
parenta7ba4558e69a3c2ae4ca521f015832ef44799538 (diff)
downloadlinux-8a59f9d1e3d4340659fdfee8879dc09a6f2546e1.tar.xz
sock: Introduce sk->sk_prot->psock_update_sk_prot()
Currently sockmap calls into each protocol to update the struct proto and replace it. This certainly won't work when the protocol is implemented as a module, for example, AF_UNIX. Introduce a new ops sk->sk_prot->psock_update_sk_prot(), so each protocol can implement its own way to replace the struct proto. This also helps get rid of symbol dependencies on CONFIG_INET. Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20210331023237.41094-11-xiyou.wangcong@gmail.com
Diffstat (limited to 'net/ipv4/udp.c')
-rw-r--r--net/ipv4/udp.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 4a0478b17243..38952aaee3a1 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -2849,6 +2849,9 @@ struct proto udp_prot = {
.unhash = udp_lib_unhash,
.rehash = udp_v4_rehash,
.get_port = udp_v4_get_port,
+#ifdef CONFIG_BPF_SYSCALL
+ .psock_update_sk_prot = udp_bpf_update_proto,
+#endif
.memory_allocated = &udp_memory_allocated,
.sysctl_mem = sysctl_udp_mem,
.sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),