Adding upstream version 6.8.0.upstream/6.8.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 576 insertions, 0 deletions

diff --git a/ip/link_gre.c b/ip/link_gre.c
new file mode 100644
index 0000000..010b482
--- /dev/null
+++ b/ip/link_gre.c
@@ -0,0 +1,576 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * link_gre.c	gre driver module
+ *
+ * Authors:	Herbert Xu <herbert@gondor.apana.org.au>
+ */
+
+#include <string.h>
+#include <net/if.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+
+#include <linux/ip.h>
+#include <linux/if_tunnel.h>
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+#include "tunnel.h"
+
+static bool gre_is_erspan(struct link_util *lu)
+{
+	return !strcmp(lu->id, "erspan");
+}
+
+static void gre_print_help(struct link_util *lu, int argc, char **argv, FILE *f)
+{
+	bool is_erspan = gre_is_erspan(lu);
+
+	fprintf(f,
+		"Usage: ... %-9s	[ remote ADDR ]\n"
+		"			[ local ADDR ]\n"
+		"			[ [no][i|o]seq ]\n"
+		"			[ [i|o]key KEY | no[i|o]key ]\n"
+		"			[ [no][i|o]csum ]\n"
+		"			[ ttl TTL ]\n"
+		"			[ tos TOS ]\n"
+		"			[ [no]pmtudisc ]\n"
+		"			[ [no]ignore-df ]\n"
+		"			[ dev PHYS_DEV ]\n"
+		"			[ fwmark MARK ]\n"
+		"			[ external ]\n"
+		"			[ noencap ]\n"
+		"			[ encap { fou | gue | none } ]\n"
+		"			[ encap-sport PORT ]\n"
+		"			[ encap-dport PORT ]\n"
+		"			[ [no]encap-csum ]\n"
+		"			[ [no]encap-csum6 ]\n"
+		"			[ [no]encap-remcsum ]\n", lu->id);
+	if (is_erspan)
+		fprintf(f,
+			"			[ erspan_ver version ]\n"
+			"			[ erspan IDX ]\n"
+			"			[ erspan_dir { ingress | egress } ]\n"
+			"			[ erspan_hwid hwid ]\n");
+	fprintf(f,
+		"\n"
+		"Where:	ADDR := { IP_ADDRESS | any }\n"
+		"	TOS  := { NUMBER | inherit }\n"
+		"	TTL  := { 1..255 | inherit }\n"
+		"	KEY  := { DOTTED_QUAD | NUMBER }\n"
+		"	MARK := { 0x0..0xffffffff }\n");
+}
+
+static int gre_parse_opt(struct link_util *lu, int argc, char **argv,
+			 struct nlmsghdr *n)
+{
+	struct ifinfomsg *ifi = NLMSG_DATA(n);
+	struct {
+		struct nlmsghdr n;
+		struct ifinfomsg i;
+	} req = {
+		.n.nlmsg_len = NLMSG_LENGTH(sizeof(*ifi)),
+		.n.nlmsg_flags = NLM_F_REQUEST,
+		.n.nlmsg_type = RTM_GETLINK,
+		.i.ifi_family = preferred_family,
+		.i.ifi_index = ifi->ifi_index,
+	};
+	struct nlmsghdr *answer = NULL;
+	struct rtattr *tb[IFLA_MAX + 1];
+	struct rtattr *linkinfo[IFLA_INFO_MAX+1];
+	struct rtattr *greinfo[IFLA_GRE_MAX + 1];
+	int len;
+	__u16 iflags = 0;
+	__u16 oflags = 0;
+	__be32 ikey = 0;
+	__be32 okey = 0;
+	inet_prefix saddr, daddr;
+	__u8 pmtudisc = 1;
+	__u8 ignore_df = 0;
+	__u8 tos = 0;
+	__u8 ttl = 0;
+	__u32 link = 0;
+	__u16 encaptype = 0;
+	__u16 encapflags = 0;
+	__u16 encapsport = 0;
+	__u16 encapdport = 0;
+	__u8 metadata = 0;
+	__u32 fwmark = 0;
+	bool is_erspan = gre_is_erspan(lu);
+	__u32 erspan_idx = 0;
+	__u8 erspan_ver = 1;
+	__u8 erspan_dir = 0;
+	__u16 erspan_hwid = 0;
+
+	inet_prefix_reset(&saddr);
+	inet_prefix_reset(&daddr);
+
+	if (!(n->nlmsg_flags & NLM_F_CREATE)) {
+		const struct rtattr *rta;
+
+		if (rtnl_talk(&rth, &req.n, &answer) < 0)
+			goto get_failed;
+
+		len = answer->nlmsg_len;
+		len -= NLMSG_LENGTH(sizeof(*ifi));
+		if (len < 0)
+			goto get_failed;
+
+		parse_rtattr(tb, IFLA_MAX, IFLA_RTA(NLMSG_DATA(answer)), len);
+
+		if (!tb[IFLA_LINKINFO])
+			goto get_failed;
+
+		parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
+
+		if (!linkinfo[IFLA_INFO_DATA])
+			goto get_failed;
+
+		parse_rtattr_nested(greinfo, IFLA_GRE_MAX,
+				    linkinfo[IFLA_INFO_DATA]);
+
+		rta = greinfo[IFLA_GRE_LOCAL];
+		if (rta && get_addr_rta(&saddr, rta, AF_INET))
+			goto get_failed;
+
+		rta = greinfo[IFLA_GRE_REMOTE];
+		if (rta && get_addr_rta(&daddr, rta, AF_INET))
+			goto get_failed;
+
+		if (greinfo[IFLA_GRE_IKEY])
+			ikey = rta_getattr_u32(greinfo[IFLA_GRE_IKEY]);
+
+		if (greinfo[IFLA_GRE_OKEY])
+			okey = rta_getattr_u32(greinfo[IFLA_GRE_OKEY]);
+
+		if (greinfo[IFLA_GRE_IFLAGS])
+			iflags = rta_getattr_u16(greinfo[IFLA_GRE_IFLAGS]);
+
+		if (greinfo[IFLA_GRE_OFLAGS])
+			oflags = rta_getattr_u16(greinfo[IFLA_GRE_OFLAGS]);
+
+		if (greinfo[IFLA_GRE_PMTUDISC])
+			pmtudisc = rta_getattr_u8(
+				greinfo[IFLA_GRE_PMTUDISC]);
+
+		if (greinfo[IFLA_GRE_IGNORE_DF])
+			ignore_df =
+				!!rta_getattr_u8(greinfo[IFLA_GRE_IGNORE_DF]);
+
+		if (greinfo[IFLA_GRE_TOS])
+			tos = rta_getattr_u8(greinfo[IFLA_GRE_TOS]);
+
+		if (greinfo[IFLA_GRE_TTL])
+			ttl = rta_getattr_u8(greinfo[IFLA_GRE_TTL]);
+
+		if (greinfo[IFLA_GRE_LINK])
+			link = rta_getattr_u32(greinfo[IFLA_GRE_LINK]);
+
+		if (greinfo[IFLA_GRE_ENCAP_TYPE])
+			encaptype = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_TYPE]);
+
+		if (greinfo[IFLA_GRE_ENCAP_FLAGS])
+			encapflags = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_FLAGS]);
+
+		if (greinfo[IFLA_GRE_ENCAP_SPORT])
+			encapsport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_SPORT]);
+
+		if (greinfo[IFLA_GRE_ENCAP_DPORT])
+			encapdport = rta_getattr_u16(greinfo[IFLA_GRE_ENCAP_DPORT]);
+
+		if (greinfo[IFLA_GRE_COLLECT_METADATA])
+			metadata = 1;
+
+		if (greinfo[IFLA_GRE_FWMARK])
+			fwmark = rta_getattr_u32(greinfo[IFLA_GRE_FWMARK]);
+
+		if (greinfo[IFLA_GRE_ERSPAN_INDEX])
+			erspan_idx = rta_getattr_u32(greinfo[IFLA_GRE_ERSPAN_INDEX]);
+
+		if (greinfo[IFLA_GRE_ERSPAN_VER])
+			erspan_ver = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_VER]);
+
+		if (greinfo[IFLA_GRE_ERSPAN_DIR])
+			erspan_dir = rta_getattr_u8(greinfo[IFLA_GRE_ERSPAN_DIR]);
+
+		if (greinfo[IFLA_GRE_ERSPAN_HWID])
+			erspan_hwid = rta_getattr_u16(greinfo[IFLA_GRE_ERSPAN_HWID]);
+
+		free(answer);
+	}
+
+	while (argc > 0) {
+		if (!matches(*argv, "key")) {
+			NEXT_ARG();
+			iflags |= GRE_KEY;
+			oflags |= GRE_KEY;
+			ikey = okey = tnl_parse_key("key", *argv);
+		} else if (!matches(*argv, "nokey")) {
+			iflags &= ~GRE_KEY;
+			oflags &= ~GRE_KEY;
+			ikey = okey = 0;
+		} else if (!matches(*argv, "ikey")) {
+			NEXT_ARG();
+			iflags |= GRE_KEY;
+			ikey = tnl_parse_key("ikey", *argv);
+		} else if (!matches(*argv, "noikey")) {
+			iflags &= ~GRE_KEY;
+			ikey = 0;
+		} else if (!matches(*argv, "okey")) {
+			NEXT_ARG();
+			oflags |= GRE_KEY;
+			okey = tnl_parse_key("okey", *argv);
+		} else if (!matches(*argv, "nookey")) {
+			oflags &= ~GRE_KEY;
+			okey = 0;
+		} else if (!matches(*argv, "seq")) {
+			iflags |= GRE_SEQ;
+			oflags |= GRE_SEQ;
+		} else if (!matches(*argv, "noseq")) {
+			iflags &= ~GRE_SEQ;
+			oflags &= ~GRE_SEQ;
+		} else if (!matches(*argv, "iseq")) {
+			iflags |= GRE_SEQ;
+		} else if (!matches(*argv, "noiseq")) {
+			iflags &= ~GRE_SEQ;
+		} else if (!matches(*argv, "oseq")) {
+			oflags |= GRE_SEQ;
+		} else if (!matches(*argv, "nooseq")) {
+			oflags &= ~GRE_SEQ;
+		} else if (!matches(*argv, "csum")) {
+			iflags |= GRE_CSUM;
+			oflags |= GRE_CSUM;
+		} else if (!matches(*argv, "nocsum")) {
+			iflags &= ~GRE_CSUM;
+			oflags &= ~GRE_CSUM;
+		} else if (!matches(*argv, "icsum")) {
+			iflags |= GRE_CSUM;
+		} else if (!matches(*argv, "noicsum")) {
+			iflags &= ~GRE_CSUM;
+		} else if (!matches(*argv, "ocsum")) {
+			oflags |= GRE_CSUM;
+		} else if (!matches(*argv, "noocsum")) {
+			oflags &= ~GRE_CSUM;
+		} else if (!matches(*argv, "nopmtudisc")) {
+			pmtudisc = 0;
+		} else if (!matches(*argv, "pmtudisc")) {
+			pmtudisc = 1;
+		} else if (!matches(*argv, "remote")) {
+			NEXT_ARG();
+			get_addr(&daddr, *argv, AF_INET);
+		} else if (!matches(*argv, "local")) {
+			NEXT_ARG();
+			get_addr(&saddr, *argv, AF_INET);
+		} else if (!matches(*argv, "dev")) {
+			NEXT_ARG();
+			link = ll_name_to_index(*argv);
+			if (!link)
+				exit(nodev(*argv));
+		} else if (!matches(*argv, "ttl") ||
+			   !matches(*argv, "hoplimit") ||
+			   !matches(*argv, "hlim")) {
+			NEXT_ARG();
+			if (strcmp(*argv, "inherit") != 0) {
+				if (get_u8(&ttl, *argv, 0))
+					invarg("invalid TTL\n", *argv);
+			} else
+				ttl = 0;
+		} else if (!matches(*argv, "tos") ||
+			   !matches(*argv, "tclass") ||
+			   !matches(*argv, "dsfield")) {
+			__u32 uval;
+
+			NEXT_ARG();
+			if (strcmp(*argv, "inherit") != 0) {
+				if (rtnl_dsfield_a2n(&uval, *argv))
+					invarg("bad TOS value", *argv);
+				tos = uval;
+			} else
+				tos = 1;
+		} else if (strcmp(*argv, "noencap") == 0) {
+			encaptype = TUNNEL_ENCAP_NONE;
+		} else if (strcmp(*argv, "encap") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "fou") == 0)
+				encaptype = TUNNEL_ENCAP_FOU;
+			else if (strcmp(*argv, "gue") == 0)
+				encaptype = TUNNEL_ENCAP_GUE;
+			else if (strcmp(*argv, "none") == 0)
+				encaptype = TUNNEL_ENCAP_NONE;
+			else
+				invarg("Invalid encap type.", *argv);
+		} else if (strcmp(*argv, "encap-sport") == 0) {
+			NEXT_ARG();
+			if (strcmp(*argv, "auto") == 0)
+				encapsport = 0;
+			else if (get_u16(&encapsport, *argv, 0))
+				invarg("Invalid source port.", *argv);
+		} else if (strcmp(*argv, "encap-dport") == 0) {
+			NEXT_ARG();
+			if (get_u16(&encapdport, *argv, 0))
+				invarg("Invalid destination port.", *argv);
+		} else if (strcmp(*argv, "encap-csum") == 0) {
+			encapflags |= TUNNEL_ENCAP_FLAG_CSUM;
+		} else if (strcmp(*argv, "noencap-csum") == 0) {
+			encapflags &= ~TUNNEL_ENCAP_FLAG_CSUM;
+		} else if (strcmp(*argv, "encap-udp6-csum") == 0) {
+			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, "external") == 0) {
+			metadata = 1;
+		} else if (strcmp(*argv, "ignore-df") == 0) {
+			ignore_df = 1;
+		} else if (strcmp(*argv, "noignore-df") == 0) {
+			/*
+			 *only the lsb is significant, use 2 for presence
+			 */
+			ignore_df = 2;
+		} else if (strcmp(*argv, "fwmark") == 0) {
+			NEXT_ARG();
+			if (get_u32(&fwmark, *argv, 0))
+				invarg("invalid fwmark\n", *argv);
+		} else if (is_erspan && strcmp(*argv, "erspan") == 0) {
+			NEXT_ARG();
+			if (get_u32(&erspan_idx, *argv, 0))
+				invarg("invalid erspan index\n", *argv);
+			if (erspan_idx & ~((1<<20) - 1) || erspan_idx == 0)
+				invarg("erspan index must be > 0 and <= 20-bit\n", *argv);
+		} else if (is_erspan && strcmp(*argv, "erspan_ver") == 0) {
+			NEXT_ARG();
+			if (get_u8(&erspan_ver, *argv, 0))
+				invarg("invalid erspan version\n", *argv);
+			if (erspan_ver > 2)
+				invarg("erspan version must be 0/1/2\n", *argv);
+		} else if (is_erspan && strcmp(*argv, "erspan_dir") == 0) {
+			NEXT_ARG();
+			if (matches(*argv, "ingress") == 0)
+				erspan_dir = 0;
+			else if (matches(*argv, "egress") == 0)
+				erspan_dir = 1;
+			else
+				invarg("Invalid erspan direction.", *argv);
+		} else if (is_erspan && strcmp(*argv, "erspan_hwid") == 0) {
+			NEXT_ARG();
+			if (get_u16(&erspan_hwid, *argv, 0))
+				invarg("invalid erspan hwid\n", *argv);
+		} else {
+			gre_print_help(lu, argc, argv, stderr);
+			return -1;
+		}
+		argc--; argv++;
+	}
+
+	if (is_addrtype_inet_multi(&daddr)) {
+		if (!ikey) {
+			ikey = daddr.data[0];
+			iflags |= GRE_KEY;
+		}
+		if (!okey) {
+			okey = daddr.data[0];
+			oflags |= GRE_KEY;
+		}
+		if (!is_addrtype_inet_not_unspec(&saddr)) {
+			fprintf(stderr,
+				"A broadcast tunnel requires a source address.\n");
+			return -1;
+		}
+	}
+
+	if (metadata) {
+		addattr_l(n, 1024, IFLA_GRE_COLLECT_METADATA, NULL, 0);
+		return 0;
+	}
+
+	addattr32(n, 1024, IFLA_GRE_IKEY, ikey);
+	addattr32(n, 1024, IFLA_GRE_OKEY, okey);
+	addattr_l(n, 1024, IFLA_GRE_IFLAGS, &iflags, 2);
+	addattr_l(n, 1024, IFLA_GRE_OFLAGS, &oflags, 2);
+	if (is_addrtype_inet_not_unspec(&saddr))
+		addattr_l(n, 1024, IFLA_GRE_LOCAL, saddr.data, saddr.bytelen);
+	if (is_addrtype_inet_not_unspec(&daddr))
+		addattr_l(n, 1024, IFLA_GRE_REMOTE, daddr.data, daddr.bytelen);
+	addattr_l(n, 1024, IFLA_GRE_PMTUDISC, &pmtudisc, 1);
+	if (ignore_df)
+		addattr8(n, 1024, IFLA_GRE_IGNORE_DF, ignore_df & 1);
+	addattr_l(n, 1024, IFLA_GRE_TOS, &tos, 1);
+	if (link)
+		addattr32(n, 1024, IFLA_GRE_LINK, link);
+	addattr_l(n, 1024, IFLA_GRE_TTL, &ttl, 1);
+	addattr32(n, 1024, IFLA_GRE_FWMARK, fwmark);
+	if (is_erspan) {
+		addattr8(n, 1024, IFLA_GRE_ERSPAN_VER, erspan_ver);
+		if (erspan_ver == 1 && erspan_idx != 0) {
+			addattr32(n, 1024, IFLA_GRE_ERSPAN_INDEX, erspan_idx);
+		} else if (erspan_ver == 2) {
+			addattr8(n, 1024, IFLA_GRE_ERSPAN_DIR, erspan_dir);
+			addattr16(n, 1024, IFLA_GRE_ERSPAN_HWID, erspan_hwid);
+		}
+	}
+	addattr16(n, 1024, IFLA_GRE_ENCAP_TYPE, encaptype);
+	addattr16(n, 1024, IFLA_GRE_ENCAP_FLAGS, encapflags);
+	addattr16(n, 1024, IFLA_GRE_ENCAP_SPORT, htons(encapsport));
+	addattr16(n, 1024, IFLA_GRE_ENCAP_DPORT, htons(encapdport));
+
+	return 0;
+
+get_failed:
+	fprintf(stderr, "Failed to get existing tunnel info.\n");
+	free(answer);
+	return -1;
+}
+
+static void gre_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+	char s2[64];
+	__u16 iflags = 0;
+	__u16 oflags = 0;
+	__u8 ttl = 0;
+	__u8 tos = 0;
+
+	if (!tb)
+		return;
+
+	if (tb[IFLA_GRE_COLLECT_METADATA]) {
+		print_bool(PRINT_ANY, "external", "external ", true);
+	}
+
+	tnl_print_endpoint("remote", tb[IFLA_GRE_REMOTE], AF_INET);
+	tnl_print_endpoint("local", tb[IFLA_GRE_LOCAL], AF_INET);
+
+	if (tb[IFLA_GRE_LINK]) {
+		__u32 link = rta_getattr_u32(tb[IFLA_GRE_LINK]);
+
+		if (link) {
+			print_string(PRINT_ANY, "link", "dev %s ",
+				     ll_index_to_name(link));
+		}
+	}
+
+	if (tb[IFLA_GRE_TTL])
+		ttl = rta_getattr_u8(tb[IFLA_GRE_TTL]);
+	if (is_json_context() || ttl)
+		print_uint(PRINT_ANY, "ttl", "ttl %u ", ttl);
+	else
+		print_string(PRINT_FP, NULL, "ttl %s ", "inherit");
+
+	if (tb[IFLA_GRE_TOS])
+		tos = rta_getattr_u8(tb[IFLA_GRE_TOS]);
+	if (tos) {
+		if (is_json_context() || tos != 1)
+			print_0xhex(PRINT_ANY, "tos", "tos %#llx ", tos);
+		else
+			print_string(PRINT_FP, NULL, "tos %s ", "inherit");
+	}
+
+	if (tb[IFLA_GRE_PMTUDISC]) {
+		if (!rta_getattr_u8(tb[IFLA_GRE_PMTUDISC]))
+			print_bool(PRINT_ANY, "pmtudisc", "nopmtudisc ", false);
+		else
+			print_bool(PRINT_JSON, "pmtudisc", NULL, true);
+	}
+
+	if (tb[IFLA_GRE_IGNORE_DF] && rta_getattr_u8(tb[IFLA_GRE_IGNORE_DF]))
+		print_bool(PRINT_ANY, "ignore_df", "ignore-df ", true);
+
+	if (tb[IFLA_GRE_IFLAGS])
+		iflags = rta_getattr_u16(tb[IFLA_GRE_IFLAGS]);
+
+	if (tb[IFLA_GRE_OFLAGS])
+		oflags = rta_getattr_u16(tb[IFLA_GRE_OFLAGS]);
+
+	if ((iflags & GRE_KEY) && tb[IFLA_GRE_IKEY]) {
+		inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_IKEY]), s2, sizeof(s2));
+		print_string(PRINT_ANY, "ikey", "ikey %s ", s2);
+	}
+
+	if ((oflags & GRE_KEY) && tb[IFLA_GRE_OKEY]) {
+		inet_ntop(AF_INET, RTA_DATA(tb[IFLA_GRE_OKEY]), s2, sizeof(s2));
+		print_string(PRINT_ANY, "okey", "okey %s ", s2);
+	}
+
+	if (iflags & GRE_SEQ)
+		print_bool(PRINT_ANY, "iseq", "iseq ", true);
+	if (oflags & GRE_SEQ)
+		print_bool(PRINT_ANY, "oseq", "oseq ", true);
+	if (iflags & GRE_CSUM)
+		print_bool(PRINT_ANY, "icsum", "icsum ", true);
+	if (oflags & GRE_CSUM)
+		print_bool(PRINT_ANY, "ocsum", "ocsum ", true);
+
+	if (tb[IFLA_GRE_FWMARK]) {
+		__u32 fwmark = rta_getattr_u32(tb[IFLA_GRE_FWMARK]);
+
+		if (fwmark) {
+			print_0xhex(PRINT_ANY,
+				    "fwmark", "fwmark %#llx ", fwmark);
+		}
+	}
+
+	if (tb[IFLA_GRE_ERSPAN_INDEX]) {
+		__u32 erspan_idx = rta_getattr_u32(tb[IFLA_GRE_ERSPAN_INDEX]);
+
+		print_uint(PRINT_ANY,
+			   "erspan_index", "erspan_index %u ", erspan_idx);
+	}
+
+	if (tb[IFLA_GRE_ERSPAN_VER]) {
+		__u8 erspan_ver = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_VER]);
+
+		print_uint(PRINT_ANY,
+			   "erspan_ver", "erspan_ver %u ", erspan_ver);
+	}
+
+	if (tb[IFLA_GRE_ERSPAN_DIR]) {
+		__u8 erspan_dir = rta_getattr_u8(tb[IFLA_GRE_ERSPAN_DIR]);
+
+		if (erspan_dir == 0)
+			print_string(PRINT_ANY, "erspan_dir",
+				     "erspan_dir %s ", "ingress");
+		else
+			print_string(PRINT_ANY, "erspan_dir",
+				     "erspan_dir %s ", "egress");
+	}
+
+	if (tb[IFLA_GRE_ERSPAN_HWID]) {
+		__u16 erspan_hwid = rta_getattr_u16(tb[IFLA_GRE_ERSPAN_HWID]);
+
+		print_0xhex(PRINT_ANY,
+			    "erspan_hwid", "erspan_hwid %#llx ", erspan_hwid);
+	}
+
+	tnl_print_encap(tb,
+			IFLA_GRE_ENCAP_TYPE,
+			IFLA_GRE_ENCAP_FLAGS,
+			IFLA_GRE_ENCAP_SPORT,
+			IFLA_GRE_ENCAP_DPORT);
+}
+
+struct link_util gre_link_util = {
+	.id = "gre",
+	.maxattr = IFLA_GRE_MAX,
+	.parse_opt = gre_parse_opt,
+	.print_opt = gre_print_opt,
+	.print_help = gre_print_help,
+};
+
+struct link_util gretap_link_util = {
+	.id = "gretap",
+	.maxattr = IFLA_GRE_MAX,
+	.parse_opt = gre_parse_opt,
+	.print_opt = gre_print_opt,
+	.print_help = gre_print_help,
+};
+
+struct link_util erspan_link_util = {
+	.id = "erspan",
+	.maxattr = IFLA_GRE_MAX,
+	.parse_opt = gre_parse_opt,
+	.print_opt = gre_print_opt,
+	.print_help = gre_print_help,
+};