From 558f82ef6e0d25e87f7468c07b6db1fbbf95a855 Mon Sep 17 00:00:00 2001
From: Masahide NAKAMURA <nakam@linux-ipv6.org>
Date: Thu, 20 Dec 2007 20:42:57 -0800
Subject: [XFRM]: Define packet dropping statistics.

This statistics is shown factor dropped by transformation
at /proc/net/xfrm_stat for developer.
It is a counter designed from current transformation source code
and defined as linux private MIB.

See Documentation/networking/xfrm_proc.txt for the detail.

Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/linux/snmp.h | 31 +++++++++++++++++++++++++++++++
 include/net/snmp.h   |  5 +++++
 include/net/xfrm.h   | 18 ++++++++++++++++++
 3 files changed, 54 insertions(+)

(limited to 'include')

diff --git a/include/linux/snmp.h b/include/linux/snmp.h
index 89f0c2b5f405..86d3effb2836 100644
--- a/include/linux/snmp.h
+++ b/include/linux/snmp.h
@@ -217,4 +217,35 @@ enum
 	__LINUX_MIB_MAX
 };
 
+/* linux Xfrm mib definitions */
+enum
+{
+	LINUX_MIB_XFRMNUM = 0,
+	LINUX_MIB_XFRMINERROR,			/* XfrmInError */
+	LINUX_MIB_XFRMINBUFFERERROR,		/* XfrmInBufferError */
+	LINUX_MIB_XFRMINHDRERROR,		/* XfrmInHdrError */
+	LINUX_MIB_XFRMINNOSTATES,		/* XfrmInNoStates */
+	LINUX_MIB_XFRMINSTATEPROTOERROR,	/* XfrmInStateProtoError */
+	LINUX_MIB_XFRMINSTATEMODEERROR,		/* XfrmInStateModeError */
+	LINUX_MIB_XFRMINSEQOUTOFWINDOW,		/* XfrmInSeqOutOfWindow */
+	LINUX_MIB_XFRMINSTATEEXPIRED,		/* XfrmInStateExpired */
+	LINUX_MIB_XFRMINSTATEMISMATCH,		/* XfrmInStateMismatch */
+	LINUX_MIB_XFRMINSTATEINVALID,		/* XfrmInStateInvalid */
+	LINUX_MIB_XFRMINTMPLMISMATCH,		/* XfrmInTmplMismatch */
+	LINUX_MIB_XFRMINNOPOLS,			/* XfrmInNoPols */
+	LINUX_MIB_XFRMINPOLBLOCK,		/* XfrmInPolBlock */
+	LINUX_MIB_XFRMINPOLERROR,		/* XfrmInPolError */
+	LINUX_MIB_XFRMOUTERROR,			/* XfrmOutError */
+	LINUX_MIB_XFRMOUTBUNDLEGENERROR,	/* XfrmOutBundleGenError */
+	LINUX_MIB_XFRMOUTBUNDLECHECKERROR,	/* XfrmOutBundleCheckError */
+	LINUX_MIB_XFRMOUTNOSTATES,		/* XfrmOutNoStates */
+	LINUX_MIB_XFRMOUTSTATEPROTOERROR,	/* XfrmOutStateProtoError */
+	LINUX_MIB_XFRMOUTSTATEMODEERROR,	/* XfrmOutStateModeError */
+	LINUX_MIB_XFRMOUTSTATEEXPIRED,		/* XfrmOutStateExpired */
+	LINUX_MIB_XFRMOUTPOLBLOCK,		/* XfrmOutPolBlock */
+	LINUX_MIB_XFRMOUTPOLDEAD,		/* XfrmOutPolDead */
+	LINUX_MIB_XFRMOUTPOLERROR,		/* XfrmOutPolError */
+	__LINUX_MIB_XFRMMAX
+};
+
 #endif	/* _LINUX_SNMP_H */
diff --git a/include/net/snmp.h b/include/net/snmp.h
index fbb66663a42c..ce2f48507510 100644
--- a/include/net/snmp.h
+++ b/include/net/snmp.h
@@ -118,6 +118,11 @@ struct linux_mib {
 	unsigned long	mibs[LINUX_MIB_MAX];
 };
 
+/* Linux Xfrm */
+#define LINUX_MIB_XFRMMAX	__LINUX_MIB_XFRMMAX
+struct linux_xfrm_mib {
+	unsigned long	mibs[LINUX_MIB_XFRMMAX];
+};
 
 /* 
  * FIXME: On x86 and some other CPUs the split into user and softirq parts
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index eea1c327c93e..a79702bcdcd0 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -19,6 +19,9 @@
 #include <net/route.h>
 #include <net/ipv6.h>
 #include <net/ip6_fib.h>
+#ifdef CONFIG_XFRM_STATISTICS
+#include <net/snmp.h>
+#endif
 
 #define XFRM_PROTO_ESP		50
 #define XFRM_PROTO_AH		51
@@ -34,6 +37,17 @@
 #define MODULE_ALIAS_XFRM_TYPE(family, proto) \
 	MODULE_ALIAS("xfrm-type-" __stringify(family) "-" __stringify(proto))
 
+#ifdef CONFIG_XFRM_STATISTICS
+DECLARE_SNMP_STAT(struct linux_xfrm_mib, xfrm_statistics);
+#define XFRM_INC_STATS(field)		SNMP_INC_STATS(xfrm_statistics, field)
+#define XFRM_INC_STATS_BH(field)	SNMP_INC_STATS_BH(xfrm_statistics, field)
+#define XFRM_INC_STATS_USER(field) 	SNMP_INC_STATS_USER(xfrm_statistics, field)
+#else
+#define XFRM_INC_STATS(field)
+#define XFRM_INC_STATS_BH(field)
+#define XFRM_INC_STATS_USER(field)
+#endif
+
 extern struct sock *xfrm_nl;
 extern u32 sysctl_xfrm_aevent_etime;
 extern u32 sysctl_xfrm_aevent_rseqth;
@@ -1139,6 +1153,10 @@ static inline void xfrm6_fini(void)
 }
 #endif
 
+#ifdef CONFIG_XFRM_STATISTICS
+extern int xfrm_proc_init(void);
+#endif
+
 extern int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*), void *);
 extern struct xfrm_state *xfrm_state_alloc(void);
 extern struct xfrm_state *xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr, 
-- 
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