Signed-off-by: Sabrina Dubroca <s...@queasysnail.net>
Reviewed-by: Stefano Brivio <sbri...@redhat.com>
---
v2: define print_onoff to print flags, fix checkpatch warnings, drop
header changes
ip/iptuntap.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)
diff --git a/ip/iptuntap.c b/ip/iptuntap.c
index 4628db2832b4..07253870472f 100644
--- a/ip/iptuntap.c
+++ b/ip/iptuntap.c
@@ -469,3 +469,89 @@ int do_iptuntap(int argc, char **argv)
*argv);
exit(-1);
}
+
+static void print_owner(FILE *f, uid_t uid)
+{
+ struct passwd *pw = getpwuid(uid);
+
+ if (pw)
+ fprintf(f, "user %s ", pw->pw_name);
+ else
+ fprintf(f, "user %u ", uid);
+}
+
+static void print_group(FILE *f, gid_t gid)
+{
+ struct group *group = getgrgid(gid);
+
+ if (group)
+ fprintf(f, "group %s ", group->gr_name);
+ else
+ fprintf(f, "group %u ", gid);
+}
+
+static void print_mq(FILE *f, struct rtattr *tb[])
+{
+ if (!tb[IFLA_TUN_MULTI_QUEUE] ||
+ !rta_getattr_u8(tb[IFLA_TUN_MULTI_QUEUE]))
+ return;
+
+ fprintf(f, "multi_queue ");
+
+ if (tb[IFLA_TUN_NUM_QUEUES]) {
+ fprintf(f, "numqueues %u ",
+ rta_getattr_u32(tb[IFLA_TUN_NUM_QUEUES]));
+ }
+
+ if (tb[IFLA_TUN_NUM_DISABLED_QUEUES]) {
+ fprintf(f, "numdisabled %u ",
+ rta_getattr_u32(tb[IFLA_TUN_NUM_DISABLED_QUEUES]));
+ }
+}
+
+static void print_onoff(FILE *f, const char *flag, __u8 val)
+{
+ fprintf(f, "%s %s ", flag, val ? "on" : "off");
+}
+
+static void tun_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+ if (!tb)
+ return;
+
+ if (tb[IFLA_TUN_TYPE]) {
+ __u8 type = rta_getattr_u8(tb[IFLA_TUN_TYPE]);
+
+ if (type == IFF_TUN)
+ fprintf(f, "type tun ");
+ else if (type == IFF_TAP)
+ fprintf(f, "type tap ");
+ else
+ fprintf(f, "type UNKNOWN:%hhu ", type);
+ }
+
+ if (tb[IFLA_TUN_PI])
+ print_onoff(f, "pi", rta_getattr_u8(tb[IFLA_TUN_PI]));
+
+ if (tb[IFLA_TUN_VNET_HDR]) {
+ print_onoff(f, "vnet_hdr",
+ rta_getattr_u8(tb[IFLA_TUN_VNET_HDR]));
+ }
+
+ print_mq(f, tb);
+
+ if (tb[IFLA_TUN_PERSIST])
+ print_onoff(f, "persist", rta_getattr_u8(tb[IFLA_TUN_PERSIST]));
+
+ if (tb[IFLA_TUN_OWNER])
+ print_owner(f, rta_getattr_u32(tb[IFLA_TUN_OWNER]));
+
+ if (tb[IFLA_TUN_GROUP])
+ print_group(f, rta_getattr_u32(tb[IFLA_TUN_GROUP]));
+}
+
+struct link_util tun_link_util = {
+ .id = "tun",
+ .maxattr = IFLA_TUN_MAX,
+ .print_opt = tun_print_opt,
+};
--
2.16.1
