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	m32r: make memset() global for CONFIG_KERNEL_BZIP2=y	2012-07-17 16:21:30 -07:00
configs	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	2011-01-20 17:02:05 -08:00
include	net: introduce SO_BPF_EXTENSIONS	2014-01-18 19:08:58 -08:00
kernel	m32r: Use preempt_schedule_irq	2013-11-13 20:21:46 +01:00
lib	m32r: export delay loop symbols	2009-10-04 12:02:36 +09:00
mm	arch: mm: pass userspace fault flag to generic fault handler	2013-09-12 15:38:01 -07:00
oprofile	oprofile: more whitespace fixes	2008-10-15 20:55:51 +02:00
platforms	Disintegrate asm/system.h for M32R	2012-03-28 18:30:02 +01:00
Kconfig	kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS	2013-11-15 09:32:22 +09:00
Kconfig.debug	consolidate per-arch stack overflow debugging options	2013-07-04 11:25:39 -07:00
Makefile	m32r: Use generic init_task	2012-05-05 13:00:23 +02:00