commit 6bdc9c4c31c81688e19cb186d49be01bbb6a1618
author John Fastabend <john.fastabend@gmail.com> Wed Aug 16 15:02:32 2017 -0700
committer David S. Miller <davem@davemloft.net> Wed Aug 16 15:34:13 2017 -0700
tree 4757c35f412230312d7c5b36bd50add6e590224d
parent cf56e3b98c5358883c8df5ed8e04661481225a8f

bpf: sock_map fixes for !CONFIG_BPF_SYSCALL and !STREAM_PARSER

Resolve issues with !CONFIG_BPF_SYSCALL and !STREAM_PARSER

net/core/filter.c: In function ‘do_sk_redirect_map’:
net/core/filter.c:1881:3: error: implicit declaration of function ‘__sock_map_lookup_elem’ [-Werror=implicit-function-declaration]
   sk = __sock_map_lookup_elem(ri->map, ri->ifindex);
   ^
net/core/filter.c:1881:6: warning: assignment makes pointer from integer without a cast [enabled by default]
   sk = __sock_map_lookup_elem(ri->map, ri->ifindex);

Fixes: 174a79ff9515 ("bpf: sockmap with sk redirect support")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

kernel/bpf/Makefile

diff --git a/kernel/bpf/Makefile b/kernel/bpf/Makefile
index aa24287..897daa0 100644
--- a/kernel/bpf/Makefile
+++ b/kernel/bpf/Makefile
@@ -3,7 +3,10 @@
 obj-$(CONFIG_BPF_SYSCALL) += syscall.o verifier.o inode.o helpers.o tnum.o
 obj-$(CONFIG_BPF_SYSCALL) += hashtab.o arraymap.o percpu_freelist.o bpf_lru_list.o lpm_trie.o map_in_map.o
 ifeq ($(CONFIG_NET),y)
-obj-$(CONFIG_BPF_SYSCALL) += devmap.o sockmap.o
+obj-$(CONFIG_BPF_SYSCALL) += devmap.o
+ifeq ($(CONFIG_STREAM_PARSER),y)
+obj-$(CONFIG_BPF_SYSCALL) += sockmap.o
+endif
 endif
 ifeq ($(CONFIG_PERF_EVENTS),y)
 obj-$(CONFIG_BPF_SYSCALL) += stackmap.o

kernel/bpf/core.c

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index c69e7f5..917cc04 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -1438,6 +1438,7 @@ const struct bpf_func_proto bpf_ktime_get_ns_proto __weak;
 const struct bpf_func_proto bpf_get_current_pid_tgid_proto __weak;
 const struct bpf_func_proto bpf_get_current_uid_gid_proto __weak;
 const struct bpf_func_proto bpf_get_current_comm_proto __weak;
+const struct bpf_func_proto bpf_sock_map_update_proto __weak;
 
 const struct bpf_func_proto * __weak bpf_get_trace_printk_proto(void)
 {