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authorJohn Fastabend <john.fastabend@gmail.com>2017-08-16 08:33:32 +0300
committerDavid S. Miller <davem@davemloft.net>2017-08-16 21:27:53 +0300
commit69e8cc134bcbf0ccfcf852c400b8e6788d1d0038 (patch)
tree181f7fc9d1a8204f93aa705e2725e7c5b766610c /tools/lib
parent8a31db5615667956c513d205cfb06885c3ec6d0b (diff)
downloadlinux-69e8cc134bcbf0ccfcf852c400b8e6788d1d0038.tar.xz
bpf: sockmap sample program
This program binds a program to a cgroup and then matches hard coded IP addresses and adds these to a sockmap. This will receive messages from the backend and send them to the client. client:X <---> frontend:10000 client:X <---> backend:10001 To keep things simple this is only designed for 1:1 connections using hard coded values. A more complete example would allow many backends and clients. To run, # sockmap <cgroup2_dir> Signed-off-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/bpf/bpf.c14
-rw-r--r--tools/lib/bpf/bpf.h4
2 files changed, 15 insertions, 3 deletions
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index e5bbb090bf88..77660157a684 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -211,20 +211,28 @@ int bpf_obj_get(const char *pathname)
return sys_bpf(BPF_OBJ_GET, &attr, sizeof(attr));
}
-int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
- unsigned int flags)
+int __bpf_prog_attach(int prog_fd1, int prog_fd2, int target_fd,
+ enum bpf_attach_type type,
+ unsigned int flags)
{
union bpf_attr attr;
bzero(&attr, sizeof(attr));
attr.target_fd = target_fd;
- attr.attach_bpf_fd = prog_fd;
+ attr.attach_bpf_fd = prog_fd1;
+ attr.attach_bpf_fd2 = prog_fd2;
attr.attach_type = type;
attr.attach_flags = flags;
return sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));
}
+int bpf_prog_attach(int prog_fd, int target_fd, enum bpf_attach_type type,
+ unsigned int flags)
+{
+ return __bpf_prog_attach(prog_fd, 0, target_fd, type, flags);
+}
+
int bpf_prog_detach(int target_fd, enum bpf_attach_type type)
{
union bpf_attr attr;
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index 418c86e69bcb..eaee585c1cea 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -50,6 +50,10 @@ int bpf_obj_pin(int fd, const char *pathname);
int bpf_obj_get(const char *pathname);
int bpf_prog_attach(int prog_fd, int attachable_fd, enum bpf_attach_type type,
unsigned int flags);
+int __bpf_prog_attach(int prog1, int prog2,
+ int attachable_fd,
+ enum bpf_attach_type type,
+ unsigned int flags);
int bpf_prog_detach(int attachable_fd, enum bpf_attach_type type);
int bpf_prog_test_run(int prog_fd, int repeat, void *data, __u32 size,
void *data_out, __u32 *size_out, __u32 *retval,