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net: rtnetlink: Enslave device before bringing it up

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Unlike with bridges, one can't add an interface to a bond and set it up
at the same time:

| # ip link set dummy0 down
| # ip link set dummy0 master bond0 up
| Error: Device can not be enslaved while up.

Of all drivers with ndo_add_slave callback, bond and team decline if
IFF_UP flag is set, vrf cycles the interface (i.e., sets it down and
immediately up again) and the others just don't care.

Support the common notion of setting the interface up after enslaving it
by sorting the operations accordingly.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220914150623.24152-1-phil@nwl.cc
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Phil Sutter 2022-09-14 17:06:23 +02:00 • committed by Jakub Kicinski
parent 5f4e25641c
commit a4abfa627c
1 changed files with 7 additions and 7 deletions
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14
net/core/rtnetlink.c
View file

@ -2777,13 +2777,6 @@ static int do_setlink(const struct sk_buff *skb,
call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
}
if (ifm->ifi_flags || ifm->ifi_change) {
err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
extack);
if (err < 0)
goto errout;
}
if (tb[IFLA_MASTER]) {
err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack);
if (err)
@ -2791,6 +2784,13 @@ static int do_setlink(const struct sk_buff *skb,
status |= DO_SETLINK_MODIFIED;
}
if (ifm->ifi_flags || ifm->ifi_change) {
err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm),
extack);
if (err < 0)
goto errout;
}
if (tb[IFLA_CARRIER]) {
err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER]));
if (err)