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authorAlexei Starovoitov <ast@plumgrid.com>2014-12-01 15:06:35 -0800
committerDavid S. Miller <davem@davemloft.net>2014-12-05 21:47:32 -0800
commit89aa075832b0da4402acebd698d0411dcc82d03e (patch)
tree99e7aa6cc85d3cd4ed0caaa6f1e5aea79e7cfcba /arch/mn10300
parentddd872bc3098f9d9abe1680a6b2013e59e3337f7 (diff)
downloadlinux-89aa075832b0da4402acebd698d0411dcc82d03e.tar.gz
net: sock: allow eBPF programs to be attached to sockets
introduce new setsockopt() command: setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd)) where prog_fd was received from syscall bpf(BPF_PROG_LOAD, attr, ...) and attr->prog_type == BPF_PROG_TYPE_SOCKET_FILTER setsockopt() calls bpf_prog_get() which increments refcnt of the program, so it doesn't get unloaded while socket is using the program. The same eBPF program can be attached to multiple sockets. User task exit automatically closes socket which calls sk_filter_uncharge() which decrements refcnt of eBPF program Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/mn10300')
-rw-r--r--arch/mn10300/include/uapi/asm/socket.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mn10300/include/uapi/asm/socket.h b/arch/mn10300/include/uapi/asm/socket.h
index f3492e8c9f7..cab7d6d5005 100644
--- a/arch/mn10300/include/uapi/asm/socket.h
+++ b/arch/mn10300/include/uapi/asm/socket.h
@@ -82,4 +82,7 @@
#define SO_INCOMING_CPU 49
+#define SO_ATTACH_BPF 50
+#define SO_DETACH_BPF SO_DETACH_FILTER
+
#endif /* _ASM_SOCKET_H */