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net: Convert protocol error handlers from void to int

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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 <sbrivio@redhat.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefano Brivio
2018-11-08 12:19:21 +01:00
committed by David S. Miller
parent ce7336610c
commit 32bbd8793f
27 changed files with 190 additions and 134 deletions
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2
net/ipv4/udp_impl.h
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@@ -7,7 +7,7 @@
#include <net/inet_common.h>
int __udp4_lib_rcv(struct sk_buff *, struct udp_table *, int);
void __udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
int __udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
int udp_v4_get_port(struct sock *sk, unsigned short snum);