@@ -31,7 +31,7 @@ static void print_usage(FILE *f)
fprintf(f, " [ ttl TTL ] [ tos TOS ] [ [no]pmtudisc ] [ dev PHYS_DEV ]\n");
fprintf(f, " [ noencap ] [ encap { fou | gue | none } ]\n");
fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
- fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ]\n");
+ fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
fprintf(f, "\n");
fprintf(f, "Where: NAME := STRING\n");
fprintf(f, " ADDR := { IP_ADDRESS | any }\n");
@@ -287,6 +287,10 @@ get_failed:
encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
encapflags |= ~TUNNEL_ENCAP_FLAG_CSUM6;
+ } else if (strcmp(*argv, "encap-remcsum") == 0) {
+ encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
+ } else if (strcmp(*argv, "noencap-remcsum") == 0) {
+ encapflags |= ~TUNNEL_ENCAP_FLAG_REMCSUM;
} else
usage();
argc--; argv++;
@@ -445,6 +449,11 @@ static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
fputs("encap-csum6 ", f);
else
fputs("noencap-csum6 ", f);
+
+ if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
+ fputs("encap-remcsum ", f);
+ else
+ fputs("noencap-remcsum ", f);
}
}
@@ -31,7 +31,7 @@ static void print_usage(FILE *f, int sit)
fprintf(f, " [ 6rd-prefix ADDR ] [ 6rd-relay_prefix ADDR ] [ 6rd-reset ]\n");
fprintf(f, " [ noencap ] [ encap { fou | gue | none } ]\n");
fprintf(f, " [ encap-sport PORT ] [ encap-dport PORT ]\n");
- fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ]\n");
+ fprintf(f, " [ [no]encap-csum ] [ [no]encap-csum6 ] [ [no]encap-remcsum ]\n");
if (sit) {
fprintf(f, " [ mode { ip6ip | ipip | any } ]\n");
fprintf(f, " [ isatap ]\n");
@@ -256,6 +256,10 @@ get_failed:
encapflags |= TUNNEL_ENCAP_FLAG_CSUM6;
} else if (strcmp(*argv, "noencap-udp6-csum") == 0) {
encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM6;
+ } else if (strcmp(*argv, "encap-remcsum") == 0) {
+ encapflags |= TUNNEL_ENCAP_FLAG_REMCSUM;
+ } else if (strcmp(*argv, "noencap-remcsum") == 0) {
+ encapflags &= ~TUNNEL_ENCAP_FLAG_REMCSUM;
} else if (strcmp(*argv, "6rd-prefix") == 0) {
inet_prefix prefix;
NEXT_ARG();
@@ -438,6 +442,11 @@ static void iptunnel_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[
fputs("encap-csum6 ", f);
else
fputs("noencap-csum6 ", f);
+
+ if (flags & TUNNEL_ENCAP_FLAG_REMCSUM)
+ fputs("encap-remcsum ", f);
+ else
+ fputs("noencap-remcsum ", f);
}
}
This patch adds support to remote checksum checksum offload confinguration for IPIP, SIT, and GRE tunnels. This patch adds a [no]encap-remcsum to ip link command which applicable when configured tunnels that use GUE. http://tools.ietf.org/html/draft-herbert-remotecsumoffload-00 Example: ip link add name tun1 type gre remote 192.168.1.1 local 192.168.1.2 \ ttl 225 encap fou encap-sport auto encap-dport 7777 encap-csum \ encap-remcsum This would create an GRE tunnel in GUE encapsulation where the source port is automatically selected (based on hash of inner packet), checksums in the encapsulating UDP header are enabled (needed.for remote checksum offload), and remote checksum ffload is configured to be used on the tunnel (affects TX side). Signed-off-by: Tom Herbert <therbert@google.com> --- ip/link_gre.c | 11 ++++++++++- ip/link_iptnl.c | 11 ++++++++++- 2 files changed, 20 insertions(+), 2 deletions(-)