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	alpha: boot: fix build breakage introduced by system.h disintegration	2013-03-08 15:05:34 -08:00
include	net: introduce SO_BPF_EXTENSIONS	2014-01-18 19:08:58 -08:00
kernel	alpha: perf: fix out-of-bounds array access triggered from raw event	2013-11-16 16:37:10 -08:00
lib	alpha: Prevent a NULL ptr dereference in csum_partial_copy.	2013-11-16 16:48:42 -08:00
math-emu	alpha: change to new Makefile flag variables	2011-01-17 05:42:13 +01:00
mm	arch: mm: pass userspace fault flag to generic fault handler	2013-09-12 15:38:01 -07:00
oprofile	oprofilefs_create_...() do not need superblock argument	2013-09-03 22:52:48 -04:00
defconfig	defconfig reduction	2010-08-14 22:26:53 +02:00
Kconfig	alpha: Switch to GENERIC_CLOCKEVENTS	2013-11-16 16:33:19 -08:00
Kconfig.debug	alpha/parisc: remove config variable DEBUG_RWLOCK	2008-02-06 10:41:03 -08:00
Makefile	alpha: makefile: don't enforce small data model for kernel builds	2013-04-07 12:59:30 -07:00