netdev - Re: [PATCH iproute2-next 4/6] iptunnel/ip6tunnel: Code cleanups

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Date:   Tue, 6 Feb 2018 19:16:13 -0700
From:   David Ahern <dsahern@...il.com>
To:     Serhey Popovych <serhe.popovych@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH iproute2-next 4/6] iptunnel/ip6tunnel: Code cleanups

On 2/2/18 6:10 AM, Serhey Popovych wrote:
> @@ -414,15 +428,18 @@ static int do_tunnels_list(struct ip_tunnel_parm *p)
>  			fprintf(stderr, "Failed to get type of \"%s\"\n", name);
>  			continue;
>  		}
> -		if (type != ARPHRD_TUNNEL && type != ARPHRD_IPGRE && type != ARPHRD_SIT)
> +		switch (type) {
> +		case ARPHRD_TUNNEL:
> +		case ARPHRD_IPGRE:
> +		case ARPHRD_SIT:
> +			break;
> +		default:
>  			continue;
> +		}
> +		memset(p1, 0, sizeof(p1));

Shouldn't that be &p1 for the first arg? I get a compile failure:

ip
    CC       iptunnel.o
    CC       ip6tunnel.o
iptunnel.c: In function ‘do_tunnels_list’:
iptunnel.c:439:10: error: incompatible type for argument 1 of ‘memset’
   memset(p1, 0, sizeof(p1));
          ^~
In file included from iptunnel.c:15:0:
/usr/include/string.h:62:14: note: expected ‘void *’ but argument is of
type ‘struct ip_tunnel_parm’
 extern void *memset (void *__s, int __c, size_t __n) __THROW __nonnull
((1));
              ^~~~~~
../config.mk:48: recipe for target 'iptunnel.o' failed

>  		if (tnl_get_ioctl(name, &p1))
>  			continue;
> -		if ((p->link && p1.link != p->link) ||
> -		    (p->name[0] && strcmp(p1.name, p->name)) ||
> -		    (p->iph.daddr && p1.iph.daddr != p->iph.daddr) ||
> -		    (p->iph.saddr && p1.iph.saddr != p->iph.saddr) ||
> -		    (p->i_key && p1.i_key != p->i_key))
> +		if (!ip_tunnel_parm_match(p, &p1))
>  			continue;
>  		print_tunnel(&p1);
>  		if (show_stats) {