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| author | Alexei Starovoitov <ast@plumgrid.com> | 2014-12-02 00:06:35 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-06 06:47:32 +0100 |
| commit | 89aa075832b0da4402acebd698d0411dcc82d03e (patch) | |
| tree | 99e7aa6cc85d3cd4ed0caaa6f1e5aea79e7cfcba /arch/m32r | |
| parent | bpf: verifier: add checks for BPF_ABS | BPF_IND instructions (diff) | |
| download | linux-89aa075832b0da4402acebd698d0411dcc82d03e.tar.xz linux-89aa075832b0da4402acebd698d0411dcc82d03e.zip | |
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/m32r')
| -rw-r--r-- | arch/m32r/include/uapi/asm/socket.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/m32r/include/uapi/asm/socket.h b/arch/m32r/include/uapi/asm/socket.h index e8589819c274..7bc4cb273856 100644 --- a/arch/m32r/include/uapi/asm/socket.h +++ b/arch/m32r/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_M32R_SOCKET_H */ |