bpf: Add support for reading socket family, type, protocol
authorDavid Ahern <dsa@cumulusnetworks.com>
Thu, 1 Dec 2016 16:48:06 +0000 (08:48 -0800)
committerDavid S. Miller <davem@davemloft.net>
Fri, 2 Dec 2016 18:46:09 +0000 (13:46 -0500)
commitaa4c1037a30f4e88f444e83d42c2befbe0d5caf5
treee2bb34c401d93df49f035a1d45c01fdff44b371d
parentad2805dc79e647ec2aee931a51924fda9d03b2fc
bpf: Add support for reading socket family, type, protocol

Add socket family, type and protocol to bpf_sock allowing bpf programs
read-only access.

Add __sk_flags_offset[0] to struct sock before the bitfield to
programmtically determine the offset of the unsigned int containing
protocol and type.

Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/sock.h
include/uapi/linux/bpf.h
net/core/filter.c