Adding upstream version 6.1.0.upstream/6.1.0upstream

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

1 files changed, 226 insertions, 0 deletions

diff --git a/ip/iplink_vrf.c b/ip/iplink_vrf.c
new file mode 100644
index 0000000..5d20f29
--- /dev/null
+++ b/ip/iplink_vrf.c
@@ -0,0 +1,226 @@
+/* iplink_vrf.c	VRF device support
+ *
+ *              This program is free software; you can redistribute it and/or
+ *              modify it under the terms of the GNU General Public License
+ *              as published by the Free Software Foundation; either version
+ *              2 of the License, or (at your option) any later version.
+ *
+ * Authors:     Shrijeet Mukherjee <shm@cumulusnetworks.com>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <linux/if_link.h>
+#include <errno.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+static void vrf_explain(FILE *f)
+{
+	fprintf(f, "Usage: ... vrf table TABLEID\n");
+}
+
+static void explain(void)
+{
+	vrf_explain(stderr);
+}
+
+static int vrf_parse_opt(struct link_util *lu, int argc, char **argv,
+			    struct nlmsghdr *n)
+{
+	while (argc > 0) {
+		if (matches(*argv, "table") == 0) {
+			__u32 table;
+
+			NEXT_ARG();
+
+			if (rtnl_rttable_a2n(&table, *argv))
+				invarg("invalid table ID\n", *argv);
+			addattr32(n, 1024, IFLA_VRF_TABLE, table);
+		} else if (matches(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr, "vrf: unknown option \"%s\"?\n",
+				*argv);
+			explain();
+			return -1;
+		}
+		argc--, argv++;
+	}
+
+	return 0;
+}
+
+static void vrf_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+	if (!tb)
+		return;
+
+	if (tb[IFLA_VRF_TABLE])
+		print_uint(PRINT_ANY,
+			   "table",
+			   "table %u ",
+			   rta_getattr_u32(tb[IFLA_VRF_TABLE]));
+}
+
+static void vrf_slave_print_opt(struct link_util *lu, FILE *f,
+				struct rtattr *tb[])
+{
+	if (!tb)
+		return;
+
+	if (tb[IFLA_VRF_PORT_TABLE]) {
+		print_uint(PRINT_ANY,
+			   "table",
+			   "table %u ",
+			   rta_getattr_u32(tb[IFLA_VRF_PORT_TABLE]));
+	}
+}
+
+static void vrf_print_help(struct link_util *lu, int argc, char **argv,
+			   FILE *f)
+{
+	vrf_explain(f);
+}
+
+struct link_util vrf_link_util = {
+	.id		= "vrf",
+	.maxattr	= IFLA_VRF_MAX,
+	.parse_opt	= vrf_parse_opt,
+	.print_opt	= vrf_print_opt,
+	.print_help	= vrf_print_help,
+};
+
+struct link_util vrf_slave_link_util = {
+	.id             = "vrf_slave",
+	.maxattr        = IFLA_VRF_PORT_MAX,
+	.print_opt	= vrf_slave_print_opt,
+};
+
+/* returns table id if name is a VRF device */
+__u32 ipvrf_get_table(const char *name)
+{
+	struct {
+		struct nlmsghdr		n;
+		struct ifinfomsg	i;
+		char			buf[1024];
+	} req = {
+		.n = {
+			.nlmsg_len   = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+			.nlmsg_flags = NLM_F_REQUEST,
+			.nlmsg_type  = RTM_GETLINK,
+		},
+		.i = {
+			.ifi_family  = preferred_family,
+		},
+	};
+	struct nlmsghdr *answer;
+	struct rtattr *tb[IFLA_MAX+1];
+	struct rtattr *li[IFLA_INFO_MAX+1];
+	struct rtattr *vrf_attr[IFLA_VRF_MAX + 1];
+	struct ifinfomsg *ifi;
+	__u32 tb_id = 0;
+	int len;
+
+	addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, strlen(name) + 1);
+
+	if (rtnl_talk_suppress_rtnl_errmsg(&rth, &req.n, &answer) < 0) {
+		/* special case "default" vrf to be the main table */
+		if (errno == ENODEV && !strcmp(name, "default"))
+			if (rtnl_rttable_a2n(&tb_id, "main"))
+				fprintf(stderr,
+					"BUG: RTTable \"main\" not found.\n");
+
+		return tb_id;
+	}
+
+	ifi = NLMSG_DATA(answer);
+	len = answer->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
+	if (len < 0) {
+		fprintf(stderr, "BUG: Invalid response to link query.\n");
+		goto out;
+	}
+
+	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
+
+	if (!tb[IFLA_LINKINFO])
+		goto out;
+
+	parse_rtattr_nested(li, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
+
+	if (!li[IFLA_INFO_KIND] || !li[IFLA_INFO_DATA])
+		goto out;
+
+	if (strcmp(RTA_DATA(li[IFLA_INFO_KIND]), "vrf"))
+		goto out;
+
+	parse_rtattr_nested(vrf_attr, IFLA_VRF_MAX, li[IFLA_INFO_DATA]);
+	if (vrf_attr[IFLA_VRF_TABLE])
+		tb_id = rta_getattr_u32(vrf_attr[IFLA_VRF_TABLE]);
+
+	if (!tb_id)
+		fprintf(stderr, "BUG: VRF %s is missing table id\n", name);
+
+out:
+	free(answer);
+	return tb_id;
+}
+
+int name_is_vrf(const char *name)
+{
+	struct {
+		struct nlmsghdr		n;
+		struct ifinfomsg	i;
+		char			buf[1024];
+	} req = {
+		.n = {
+			.nlmsg_len   = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+			.nlmsg_flags = NLM_F_REQUEST,
+			.nlmsg_type  = RTM_GETLINK,
+		},
+		.i = {
+			.ifi_family  = preferred_family,
+		},
+	};
+	struct nlmsghdr *answer;
+	struct rtattr *tb[IFLA_MAX+1];
+	struct rtattr *li[IFLA_INFO_MAX+1];
+	struct ifinfomsg *ifi;
+	int ifindex = 0;
+	int len;
+
+	addattr_l(&req.n, sizeof(req), IFLA_IFNAME, name, strlen(name) + 1);
+
+	if (rtnl_talk_suppress_rtnl_errmsg(&rth, &req.n, &answer) < 0)
+		return 0;
+
+	ifi = NLMSG_DATA(answer);
+	len = answer->nlmsg_len - NLMSG_LENGTH(sizeof(*ifi));
+	if (len < 0) {
+		fprintf(stderr, "BUG: Invalid response to link query.\n");
+		goto out;
+	}
+
+	parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
+
+	if (!tb[IFLA_LINKINFO])
+		goto out;
+
+	parse_rtattr_nested(li, IFLA_INFO_MAX, tb[IFLA_LINKINFO]);
+
+	if (!li[IFLA_INFO_KIND])
+		goto out;
+
+	if (strcmp(RTA_DATA(li[IFLA_INFO_KIND]), "vrf"))
+		goto out;
+
+	ifindex = ifi->ifi_index;
+out:
+	free(answer);
+	return ifindex;
+}