From e6afa00a1409bc3bceed9ccb33111519463dfe7b Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Thu, 17 Jan 2013 18:43:46 +0100 Subject: can: gw: indicate and count deleted frames due to misconfiguration Add a statistic counter to detect deleted frames due to misconfiguration with a new read-only CGW_DELETED netlink attribute for the CAN gateway. Signed-off-by: Oliver Hartkopp Signed-off-by: Marc Kleine-Budde --- net/can/gw.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'net/can') diff --git a/net/can/gw.c b/net/can/gw.c index 4216a80618cb..acdd4656cc3b 100644 --- a/net/can/gw.c +++ b/net/can/gw.c @@ -131,6 +131,7 @@ struct cgw_job { struct rcu_head rcu; u32 handled_frames; u32 dropped_frames; + u32 deleted_frames; struct cf_mod mod; union { /* CAN frame data source */ @@ -367,8 +368,11 @@ static void can_can_gw_rcv(struct sk_buff *skb, void *data) BUG_ON(skb->ip_summed != CHECKSUM_UNNECESSARY); - if (cgw_hops(skb) >= max_hops) + if (cgw_hops(skb) >= max_hops) { + /* indicate deleted frames due to misconfiguration */ + gwj->deleted_frames++; return; + } if (!(gwj->dst.dev->flags & IFF_UP)) { gwj->dropped_frames++; @@ -500,6 +504,11 @@ static int cgw_put_job(struct sk_buff *skb, struct cgw_job *gwj, int type, goto cancel; } + if (gwj->deleted_frames) { + if (nla_put_u32(skb, CGW_DELETED, gwj->deleted_frames) < 0) + goto cancel; + } + /* check non default settings of attributes */ if (gwj->mod.modtype.and) { @@ -799,6 +808,7 @@ static int cgw_create_job(struct sk_buff *skb, struct nlmsghdr *nlh, gwj->handled_frames = 0; gwj->dropped_frames = 0; + gwj->deleted_frames = 0; gwj->flags = r->flags; gwj->gwtype = r->gwtype; -- cgit v1.2.3-59-g8ed1b