[XFRM]: Support to increment packet dropping statistics.

[karo-tx-linux.git] / net / xfrm / xfrm_input.c

diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 8624cbdb2a1eea89627c3ee28e56b51c50cc87c8..493243fc5fe5d8db1efbba92991d98493676e4a7 100644 (file)
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -119,8 +119,10 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
                struct sec_path *sp;
 
                sp = secpath_dup(skb->sp);
-               if (!sp)
+               if (!sp) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINERROR);
                        goto drop;
+               }
                if (skb->sp)
                        secpath_put(skb->sp);
                skb->sp = sp;
@@ -131,31 +133,45 @@ int xfrm_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
        family = XFRM_SPI_SKB_CB(skb)->family;
 
        seq = 0;
-       if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
+       if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0) {
+               XFRM_INC_STATS(LINUX_MIB_XFRMINHDRERROR);
                goto drop;
+       }
 
        do {
-               if (skb->sp->len == XFRM_MAX_DEPTH)
+               if (skb->sp->len == XFRM_MAX_DEPTH) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINBUFFERERROR);
                        goto drop;
+               }
 
                x = xfrm_state_lookup(daddr, spi, nexthdr, family);
-               if (x == NULL)
+               if (x == NULL) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINNOSTATES);
                        goto drop;
+               }
 
                skb->sp->xvec[skb->sp->len++] = x;
 
                spin_lock(&x->lock);
-               if (unlikely(x->km.state != XFRM_STATE_VALID))
+               if (unlikely(x->km.state != XFRM_STATE_VALID)) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEINVALID);
                        goto drop_unlock;
+               }
 
-               if ((x->encap ? x->encap->encap_type : 0) != encap_type)
+               if ((x->encap ? x->encap->encap_type : 0) != encap_type) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEINVALID);
                        goto drop_unlock;
+               }
 
-               if (x->props.replay_window && xfrm_replay_check(x, seq))
+               if (x->props.replay_window && xfrm_replay_check(x, seq)) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINSEQOUTOFWINDOW);
                        goto drop_unlock;
+               }
 
-               if (xfrm_state_check_expire(x))
+               if (xfrm_state_check_expire(x)) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEEXPIRED);
                        goto drop_unlock;
+               }
 
                spin_unlock(&x->lock);
 
@@ -171,6 +187,7 @@ resume:
                if (nexthdr <= 0) {
                        if (nexthdr == -EBADMSG)
                                x->stats.integrity_failed++;
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEPROTOERROR);
                        goto drop_unlock;
                }
 
@@ -187,8 +204,10 @@ resume:
 
                XFRM_MODE_SKB_CB(skb)->protocol = nexthdr;
 
-               if (x->inner_mode->input(x, skb))
+               if (x->inner_mode->input(x, skb)) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINSTATEMODEERROR);
                        goto drop;
+               }
 
                if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
                        decaps = 1;
@@ -203,8 +222,10 @@ resume:
                family = x->outer_mode->afinfo->family;
 
                err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
-               if (err < 0)
+               if (err < 0) {
+                       XFRM_INC_STATS(LINUX_MIB_XFRMINHDRERROR);
                        goto drop;
+               }
        } while (!err);
 
        nf_reset(skb);