net: ptp: use sk_unattached_filter_create() for BPF
authorDaniel Borkmann <dborkman@redhat.com>
Fri, 28 Mar 2014 17:58:21 +0000 (18:58 +0100)
committerDavid S. Miller <davem@davemloft.net>
Mon, 31 Mar 2014 04:45:09 +0000 (00:45 -0400)
commite62d2df084e2849edffb206559725fa81bb569a8
tree61e780e343f2c78d4f1ad0be6035ccdff467a36b
parentfbc907f0b1386c02e00516aa78a0fa6b0454fd0b
net: ptp: use sk_unattached_filter_create() for BPF

This patch migrates an open-coded sk_run_filter() implementation with
proper use of the BPF API, that is, sk_unattached_filter_create(). This
migration is needed, as we will be internally transforming the filter
to a different representation, and therefore needs to be decoupled.

It is okay to do so as skb_timestamping_init() is called during
initialization of the network stack in core initcall via sock_init().
This would effectively also allow for PTP filters to be jit compiled if
bpf_jit_enable is set.

For better readability, there are also some newlines introduced, also
ptp_classify.h is only in kernel space.

Joint work with Alexei Starovoitov.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Richard Cochran <richard.cochran@omicron.at>
Cc: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/ptp_classify.h
net/core/timestamping.c