Daniel Borkmann 408eccce32 net: ptp: move PTP classifier in its own file ... This commit fixes a build error reported by Fengguang, that is triggered when CONFIG_NETWORK_PHY_TIMESTAMPING is not set: ERROR: "ptp_classify_raw" [drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe.ko] undefined! The fix is to introduce its own file for the PTP BPF classifier, so that PTP_1588_CLOCK and/or NETWORK_PHY_TIMESTAMPING can select it independently from each other. IXP4xx driver on ARM needs to select it as well since it does not seem to select PTP_1588_CLOCK or similar that would pull it in automatically. This also allows for hiding all of the internals of the BPF PTP program inside that file, and only exporting relevant API bits to drivers. This patch also adds a kdoc documentation of ptp_classify_raw() API to make it clear that it can return PTP_CLASS_* defines. Also, the BPF program has been translated into bpf_asm code, so that it can be more easily read and altered (extensively documented in [1]). In the kernel tree under tools/net/ we have bpf_asm and bpf_dbg tools, so the commented program can simply be translated via `./bpf_asm -c prog` where prog is a file that contains the commented code. This makes it easily readable/verifiable and when there's a need to change something, jump offsets etc do not need to be replaced manually which can be very error prone. Instead, a newly translated version via bpf_asm can simply replace the old code. I have checked opcode diffs before/after and it's the very same filter. [1] Documentation/networking/filter.txt Fixes: 164d8c6665 ("net: ptp: do not reimplement PTP/BPF classifier") Reported-by: Fengguang Wu <fengguang.wu@intel.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Jiri Benc <jbenc@redhat.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-04-01 16:43:18 -04:00
..
Kconfig	net: ptp: move PTP classifier in its own file	2014-04-01 16:43:18 -04:00
Makefile	supports eg20t ptp clock	2012-03-09 13:55:34 -08:00
ptp_chardev.c	ptp: introduce programmable pins.	2014-03-21 14:21:13 -04:00
ptp_clock.c	ptp: introduce programmable pins.	2014-03-21 14:21:13 -04:00
ptp_ixp46x.c	ptp: drivers: set the number of programmable pins.	2014-03-21 14:21:14 -04:00
ptp_pch.c	ptp: drivers: set the number of programmable pins.	2014-03-21 14:21:14 -04:00
ptp_private.h	ptp: expose the programmable pins via sysfs	2014-03-21 14:21:14 -04:00
ptp_sysfs.c	ptp: expose the programmable pins via sysfs	2014-03-21 14:21:14 -04:00