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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a.out.h
auxvec.h
bitsperlong.h
byteorder.h
compiler.h
console.h
errno.h	errno.h: remove "NFS" from descriptions in comments	2013-11-13 12:09:12 +09:00
fcntl.h	Safer ABI for O_TMPFILE	2013-07-13 13:26:37 +04:00
fpu.h
gentrap.h
ioctl.h
ioctls.h
ipcbuf.h
Kbuild
kvm_para.h
mman.h
msgbuf.h
pal.h	alpha: Primitive support for CPU power down.	2013-11-16 16:33:15 -08:00
param.h	alpha: Force the user-visible HZ to a constant 1024.	2013-07-19 13:54:26 -07:00
poll.h
posix_types.h
ptrace.h
reg.h
regdef.h
resource.h
sembuf.h
setup.h
shmbuf.h
sigcontext.h
siginfo.h
signal.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2012-12-20 18:05:28 -08:00
socket.h	net: introduce SO_BPF_EXTENSIONS	2014-01-18 19:08:58 -08:00
sockios.h
stat.h
statfs.h
swab.h
sysinfo.h
termbits.h
termios.h
types.h
unistd.h	alpha: Add kcmp and finit_module syscalls	2013-07-19 13:54:23 -07:00