This flag is allowed for devices in passthru mode to prevent forcing the
underlying interface into promiscuous mode.
Signed-off-by: Phil Sutter <p...@nwl.cc>
---
ip/iplink_macvlan.c | 30 +++++++++++++++++++++++++++---
1 file changed, 27 insertions(+), 3 deletions(-)
diff --git a/ip/iplink_macvlan.c b/ip/iplink_macvlan.c
index d759f0e..f195e81 100644
--- a/ip/iplink_macvlan.c
+++ b/ip/iplink_macvlan.c
@@ -29,7 +29,7 @@
static void print_explain(struct link_util *lu, FILE *f)
{
fprintf(f,
- "Usage: ... %s mode { private | vepa | bridge | passthru }\n",
+ "Usage: ... %s mode { private | vepa | bridge | passthru
[nopromisc] }\n",
lu->id
);
}
@@ -49,9 +49,11 @@ static int mode_arg(const char *arg)
static int macvlan_parse_opt(struct link_util *lu, int argc, char **argv,
struct nlmsghdr *n)
{
+ __u32 mode = 0;
+ __u16 flags = 0;
+
while (argc > 0) {
if (matches(*argv, "mode") == 0) {
- __u32 mode = 0;
NEXT_ARG();
if (strcmp(*argv, "private") == 0)
@@ -64,7 +66,8 @@ static int macvlan_parse_opt(struct link_util *lu, int argc,
char **argv,
mode = MACVLAN_MODE_PASSTHRU;
else
return mode_arg(*argv);
- addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
+ } else if (matches(*argv, "nopromisc") == 0) {
+ flags |= MACVLAN_FLAG_NOPROMISC;
} else if (matches(*argv, "help") == 0) {
explain(lu);
return -1;
@@ -76,12 +79,25 @@ static int macvlan_parse_opt(struct link_util *lu, int
argc, char **argv,
argc--, argv++;
}
+ if (mode)
+ addattr32(n, 1024, IFLA_MACVLAN_MODE, mode);
+
+ if (flags) {
+ if (flags & MACVLAN_FLAG_NOPROMISC &&
+ mode != MACVLAN_MODE_PASSTHRU) {
+ pfx_err(lu, "nopromisc flag only valid in passthru
mode");
+ explain(lu);
+ return -1;
+ }
+ addattr16(n, 1024, IFLA_MACVLAN_FLAGS, flags);
+ }
return 0;
}
static void macvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr
*tb[])
{
__u32 mode;
+ __u16 flags;
if (!tb)
return;
@@ -97,6 +113,14 @@ static void macvlan_print_opt(struct link_util *lu, FILE
*f, struct rtattr *tb[]
: mode == MACVLAN_MODE_BRIDGE ? "bridge"
: mode == MACVLAN_MODE_PASSTHRU ? "passthru"
: "unknown");
+
+ if (!tb[IFLA_MACVLAN_FLAGS] ||
+ RTA_PAYLOAD(tb[IFLA_MACVLAN_FLAGS]) < sizeof(__u16))
+ return;
+
+ flags = rta_getattr_u16(tb[IFLA_MACVLAN_FLAGS]);
+ if (flags & MACVLAN_FLAG_NOPROMISC)
+ fprintf(f, "nopromisc ");
}
static void macvlan_print_help(struct link_util *lu, int argc, char **argv,
--
2.1.2
--
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