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device: fix reapply of MTU

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When we set the MTU on the link we remember its previous source
(ip-config, parent-device or connection profile) and don't change it
again afterwards to avoid interfering with user's manual changes. The
only exceptions when we change it again are (1) if the parent device
MTU changes and (2) if the new MTU has higher priority than the one
previously set.

To allow a live reapply of the MTU property we also need to clear the
saved source, or the checks described above will prevent setting the
new value.

Fixes: 2f8917237f ('device: rework mtu priority handling')

https://bugzilla.redhat.com/show_bug.cgi?id=1702657
This commit is contained in:
Beniamino Galvani 2019-04-26 10:49:21 +02:00
parent 9ecbca4798
commit 4ed72fa658
1 changed files with 3 additions and 0 deletions
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3
src/devices/nm-device.c
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@ -11354,6 +11354,9 @@ check_and_reapply_connection (NMDevice *self,
s_ip6_old = nm_connection_get_setting_ip6_config (con_old);
s_ip6_new = nm_connection_get_setting_ip6_config (con_new);
/* Allow reapply of MTU */
priv->mtu_source = NM_DEVICE_MTU_SOURCE_NONE;
nm_device_reactivate_ip4_config (self, s_ip4_old, s_ip4_new);
nm_device_reactivate_ip6_config (self, s_ip6_old, s_ip6_new);