Since linux commit
22d6552f827e ("xfrm interface: fix management of
phydev"), phydev is not mandatory anymore.
Note that it also could be useful before the above commit to not force the
user to put a phydev (the kernel was checking it anyway).
For example, it was useful to not set it in case of x-netns, because the
phydev is not available in the current netns:
Before the patch:
$ ip netns add foo
$ ip link add xfrm1 type xfrm dev eth1 if_id 1
$ ip link set xfrm1 netns foo
$ ip -n foo link set xfrm1 type xfrm dev eth1 if_id 2
Cannot find device "eth1"
$ ip -n foo link set xfrm1 type xfrm if_id 2
must specify physical device
Fixes: 286446c1e8c7 ("ip: support for xfrm interfaces")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Matt Ellison <matt@arroyo.io>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
- "Usage: ... %-4s dev PHYS_DEV [ if_id IF-ID ]\n"
+ "Usage: ... %-4s dev [ PHYS_DEV ] [ if_id IF-ID ]\n"
"\n"
"Where: IF-ID := { 0x0..0xffffffff }\n",
lu->id);
"\n"
"Where: IF-ID := { 0x0..0xffffffff }\n",
lu->id);
addattr32(n, 1024, IFLA_XFRM_LINK, link);
addattr32(n, 1024, IFLA_XFRM_LINK, link);
- } else {
- fprintf(stderr, "must specify physical device\n");
- return -1;
- }