From 32bbd8793f24b0d5beb1cdb33c45c75ad1140e4b Mon Sep 17 00:00:00 2001 From: Stefano Brivio Date: Thu, 8 Nov 2018 12:19:21 +0100 Subject: net: Convert protocol error handlers from void to int We'll need this to handle ICMP errors for tunnels without a sending socket (i.e. FoU and GUE). There, we might have to look up different types of IP tunnels, registered as network protocols, before we get a match, so we want this for the error handlers of IPPROTO_IPIP and IPPROTO_IPV6 in both inet_protos and inet6_protos. These error codes will be used in the next patch. For consistency, return sensible error codes in protocol error handlers whenever handlers can't handle errors because, even if valid, they don't match a protocol or any of its states. This has no effect on existing error handling paths. Signed-off-by: Stefano Brivio Reviewed-by: Sabrina Dubroca Signed-off-by: David S. Miller --- net/sctp/ipv6.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'net/sctp/ipv6.c') diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index fc6c5e4bffa5..6e27c62646e9 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -138,7 +138,7 @@ static struct notifier_block sctp_inet6addr_notifier = { }; /* ICMP error handler. */ -static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, +static int sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, u8 type, u8 code, int offset, __be32 info) { struct inet6_dev *idev; @@ -147,7 +147,7 @@ static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, struct sctp_transport *transport; struct ipv6_pinfo *np; __u16 saveip, savesctp; - int err; + int err, ret = 0; struct net *net = dev_net(skb->dev); idev = in6_dev_get(skb->dev); @@ -163,6 +163,7 @@ static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, skb->transport_header = savesctp; if (!sk) { __ICMP6_INC_STATS(net, idev, ICMP6_MIB_INERRORS); + ret = -ENOENT; goto out; } @@ -202,6 +203,8 @@ out_unlock: out: if (likely(idev != NULL)) in6_dev_put(idev); + + return ret; } static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) -- cgit v1.2.3