linux/arch/m32r
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
..
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
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