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
..
arch-v10	CRIS: drop unused Kconfig symbols	2013-09-10 17:38:07 +02:00
arch-v32	CRIS: drop unused Kconfig symbols	2013-09-10 17:38:07 +02:00
boot	Fix common misspellings	2011-03-31 11:26:23 -03:00
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	proc: Use PDE attribute setting accessor functions	2013-05-07 15:01:11 -04:00
mm	arch: mm: pass userspace fault flag to generic fault handler	2013-09-12 15:38:01 -07:00
Kconfig	cpufreq: remove CONFIG_CPU_FREQ_TABLE	2013-10-16 00:50:33 +02:00
Kconfig.debug	Kconfig: remove a few puzzling comments	2011-10-31 10:58:48 +01:00
Makefile	UAPI: Partition the header include path sets and add uapi/ header directories	2012-10-02 18:01:26 +01:00