fou: show usage even if the module is not available

Currently, the `ip fou` command tries to initialize a genl context even
when we just want to see the help for the command, which doesn't require
to talk to the kernel at all.

Delay genl initialization, which can fail if the module isn't loaded,
until the point where we will actually need it.

Fixes: 6928747b6e ("ip fou: Support to configure foo-over-udp RX")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
This commit is contained in:
Sabrina Dubroca 2016-08-16 16:26:57 +02:00 committed by Stephen Hemminger
parent 688f9aa4f2
commit d240a0e174
1 changed files with 6 additions and 6 deletions

View File

@ -136,19 +136,19 @@ static int do_del(int argc, char **argv)
int do_ipfou(int argc, char **argv)
{
if (genl_init_handle(&genl_rth, FOU_GENL_NAME, &genl_family))
exit(1);
if (argc < 1)
usage();
if (matches(*argv, "help") == 0)
usage();
if (genl_init_handle(&genl_rth, FOU_GENL_NAME, &genl_family))
exit(1);
if (matches(*argv, "add") == 0)
return do_add(argc-1, argv+1);
if (matches(*argv, "delete") == 0)
return do_del(argc-1, argv+1);
if (matches(*argv, "help") == 0)
usage();
fprintf(stderr, "Command \"%s\" is unknown, try \"ip fou help\".\n", *argv);
exit(-1);
}