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geneve: Add support for configuring UDP checksums. 

Enable support for configuring outer UDP checksums on Geneve tunnels:

ip link add type geneve id 10 remote 10.0.0.2 udpcsum

Signed-off-by: Jesse Gross <jesse@kernel.org>
This commit is contained in:
Jesse Gross 2016-03-18 17:51:09 -07:00 committed by Stephen Hemminger
parent af3253984d
commit 325d02b44c
1 changed files with 48 additions and 0 deletions
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48
ip/iplink_geneve.c
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@ -20,6 +20,7 @@ static void print_explain(FILE *f)
fprintf(f, "Usage: ... geneve id VNI remote ADDR\n");
fprintf(f, " [ ttl TTL ] [ tos TOS ]\n");
fprintf(f, " [ dstport PORT ] [ [no]external ]\n");
fprintf(f, " [ [no]udpcsum ] [ [no]udp6zerocsumtx ] [ [no]udp6zerocsumrx ]\n");
fprintf(f, "\n");
fprintf(f, "Where: VNI := 0-16777215\n");
fprintf(f, " ADDR := IP_ADDRESS\n");
@ -43,6 +44,12 @@ static int geneve_parse_opt(struct link_util *lu, int argc, char **argv,
__u8 tos = 0;
__u16 dstport = 0;
bool metadata = 0;
__u8 udpcsum = 0;
bool udpcsum_set = false;
__u8 udp6zerocsumtx = 0;
bool udp6zerocsumtx_set = false;
__u8 udp6zerocsumrx = 0;
bool udp6zerocsumrx_set = false;
while (argc > 0) {
if (!matches(*argv, "id") ||
@ -91,6 +98,24 @@ static int geneve_parse_opt(struct link_util *lu, int argc, char **argv,
metadata = true;
} else if (!matches(*argv, "noexternal")) {
metadata = false;
} else if (!matches(*argv, "udpcsum")) {
udpcsum = 1;
udpcsum_set = true;
} else if (!matches(*argv, "noudpcsum")) {
udpcsum = 0;
udpcsum_set = true;
} else if (!matches(*argv, "udp6zerocsumtx")) {
udp6zerocsumtx = 1;
udp6zerocsumtx_set = true;
} else if (!matches(*argv, "noudp6zerocsumtx")) {
udp6zerocsumtx = 0;
udp6zerocsumtx_set = true;
} else if (!matches(*argv, "udp6zerocsumrx")) {
udp6zerocsumrx = 1;
udp6zerocsumrx_set = true;
} else if (!matches(*argv, "noudp6zerocsumrx")) {
udp6zerocsumrx = 0;
udp6zerocsumrx_set = true;
} else if (matches(*argv, "help") == 0) {
explain();
return -1;
@ -131,6 +156,12 @@ static int geneve_parse_opt(struct link_util *lu, int argc, char **argv,
addattr16(n, 1024, IFLA_GENEVE_PORT, htons(dstport));
if (metadata)
addattr(n, 1024, IFLA_GENEVE_COLLECT_METADATA);
if (udpcsum_set)
addattr8(n, 1024, IFLA_GENEVE_UDP_CSUM, udpcsum);
if (udp6zerocsumtx_set)
addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_TX, udp6zerocsumtx);
if (udp6zerocsumrx_set)
addattr8(n, 1024, IFLA_GENEVE_UDP_ZERO_CSUM6_RX, udp6zerocsumrx);
return 0;
}
@ -189,6 +220,23 @@ static void geneve_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
if (tb[IFLA_GENEVE_COLLECT_METADATA])
fputs("external ", f);
if (tb[IFLA_GENEVE_UDP_CSUM]) {
if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_CSUM]))
fputs("no", f);
fputs("udpcsum ", f);
}
if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]) {
if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_TX]))
fputs("no", f);
fputs("udp6zerocsumtx ", f);
}
if (tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]) {
if (!rta_getattr_u8(tb[IFLA_GENEVE_UDP_ZERO_CSUM6_RX]))
fputs("no", f);
fputs("udp6zerocsumrx ", f);
}
}
static void geneve_print_help(struct link_util *lu, int argc, char **argv,