Michal Sekletar ea02f9411d net: introduce SO_BPF_EXTENSIONS ... For user space packet capturing libraries such as libpcap, there's currently only one way to check which BPF extensions are supported by the kernel, that is, commit aa1113d9f8 ("net: filter: return -EINVAL if BPF_S_ANC* operation is not supported"). For querying all extensions at once this might be rather inconvenient. Therefore, this patch introduces a new option which can be used as an argument for getsockopt(), and allows one to obtain information about which BPF extensions are supported by the current kernel. As David Miller suggests, we do not need to define any bits right now and status quo can just return 0 in order to state that this versions supports SKF_AD_PROTOCOL up to SKF_AD_PAY_OFFSET. Later additions to BPF extensions need to add their bits to the bpf_tell_extensions() function, as documented in the comment. Signed-off-by: Michal Sekletar <msekleta@redhat.com> Cc: David Miller <davem@davemloft.net> Reviewed-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2014-01-18 19:08:58 -08:00
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boot	xtensa: don't use echo -e needlessly	2013-09-06 09:48:29 -07:00
configs	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
include	net: introduce SO_BPF_EXTENSIONS	2014-01-18 19:08:58 -08:00
kernel	DeviceTree updates for 3.13. This is a bit larger pull request than	2013-11-12 16:52:17 +09:00
lib	xtensa: clean up files to make them code-style compliant	2012-12-18 21:10:25 -08:00
mm	xtensa: use buddy allocator for PTE table	2013-11-15 09:32:19 +09:00
oprofile	xtensa: fix oprofile building as module	2013-05-09 01:07:09 -07:00
platforms	xtensa: Cocci spatch "noderef"	2013-10-16 11:48:31 -07:00
variants	xtensa: consolidate ccount access routines	2013-07-08 01:11:37 -07:00
Kconfig	Remove GENERIC_HARDIRQ config option	2013-09-13 15:09:52 +02:00
Kconfig.debug	xtensa: check TLB sanity on return to userspace	2013-07-08 01:18:56 -07:00
Makefile	xtensa: don't use echo -e needlessly	2013-09-06 09:48:29 -07:00