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net: loopback: use NET_NAME_PREDICTABLE for name_assign_type

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[ Upstream commit 31d929de5a ]

When the name_assign_type attribute was introduced (commit
685343fc3b, "net: add name_assign_type netdev attribute"), the
loopback device was explicitly mentioned as one which would make use
of NET_NAME_PREDICTABLE:

    The name_assign_type attribute gives hints where the interface name of a
    given net-device comes from. These values are currently defined:
...
      NET_NAME_PREDICTABLE:
        The ifname has been assigned by the kernel in a predictable way
        that is guaranteed to avoid reuse and always be the same for a
        given device. Examples include statically created devices like
        the loopback device [...]

Switch to that so that reading /sys/class/net/lo/name_assign_type
produces something sensible instead of returning -EINVAL.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Rasmus Villemoes 2022-11-23 15:18:28 +01:00 committed by Greg Kroah-Hartman
parent 251f65fde6
commit cb6ca98c81
1 changed files with 1 additions and 1 deletions
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2
drivers/net/loopback.c
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@ -211,7 +211,7 @@ static __net_init int loopback_net_init(struct net *net)
int err;
err = -ENOMEM;
dev = alloc_netdev(0, "lo", NET_NAME_UNKNOWN, loopback_setup);
dev = alloc_netdev(0, "lo", NET_NAME_PREDICTABLE, loopback_setup);
if (!dev)
goto out;