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netfilter: allow hooks to pass error code back up the stack

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SELinux would like to pass certain fatal errors back up the stack.  This patch
implements the generic netfilter support for this functionality.

Based-on-patch-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Paris
2010-11-16 11:52:38 +00:00
committed by David S. Miller
parent 37d6680042
commit da68365004
2 changed files with 6 additions and 2 deletions
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include/linux/netfilter.h
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@@ -33,6 +33,8 @@
#define NF_QUEUE_NR(x) ((((x) << NF_VERDICT_BITS) & NF_VERDICT_QMASK) | NF_QUEUE)
#define NF_DROP_ERR(x) (((-x) << NF_VERDICT_BITS) | NF_DROP)
/* only for userspace compatibility */
#ifndef __KERNEL__
/* Generic cache responses from hook functions.