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iproute_lwtunnel: csum_mode value checking was ineffective 

ila_csum_name2mode() returning -1 on error but being declared as
returning __u8 doesn't make much sense. Change the code to correctly
detect this issue. Checking for __u8 overruns shouldn't be necessary
though since ila_csum_name2mode() return values are well-defined.

Signed-off-by: Phil Sutter <phil@nwl.cc>
This commit is contained in:
Phil Sutter 2017-08-17 19:09:30 +02:00 committed by Stephen Hemminger
parent 58a15e6c7e
commit 08806fb019
1 changed files with 4 additions and 3 deletions
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7
ip/iproute_lwtunnel.c
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@ -171,7 +171,7 @@ static char *ila_csum_mode2name(__u8 csum_mode)
}
}
static __u8 ila_csum_name2mode(char *name)
static int ila_csum_name2mode(char *name)
{
if (strcmp(name, "adj-transport") == 0)
return ILA_CSUM_ADJUST_TRANSPORT;
@ -517,7 +517,7 @@ static int parse_encap_ila(struct rtattr *rta, size_t len,
while (argc > 0) {
if (strcmp(*argv, "csum-mode") == 0) {
__u8 csum_mode;
int csum_mode;
NEXT_ARG();
@ -526,7 +526,8 @@ static int parse_encap_ila(struct rtattr *rta, size_t len,
invarg("\"csum-mode\" value is invalid\n",
*argv);
rta_addattr8(rta, 1024, ILA_ATTR_CSUM_MODE, csum_mode);
rta_addattr8(rta, 1024, ILA_ATTR_CSUM_MODE,
(__u8)csum_mode);
argc--; argv++;
} else {