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device: allow reapplying the sriov.preserve-on-down property

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It is useful when there is an already active device and we want to
bring it down preserving the SR-IOV VFs. For example:

  $ nmcli connection add type ethernet ifname eni1np1 sriov.total-vfs 2 ipv4.method disabled ipv6.method disabled
  $ nmcli connection up ethernet-eni1np1

  $ ip link show eni1np1
  342: eni1np1: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
      link/ether 6e:cf:f0:08:74:f4 brd ff:ff:ff:ff:ff:ff
      vf 0     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff, ...
      vf 1     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff, ...

  $ nmcli device modify eni1np1 sriov.preserve-on-down yes
  $ nmcli connection down ethernet-eni1np1

  $ ip link show eni1np1
  342: eni1np1: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
      link/ether 6e:cf:f0:08:74:f4 brd ff:ff:ff:ff:ff:ff
      vf 0     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff, ...
      vf 1     link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff, ...

(cherry picked from commit 6f219aa649)
This commit is contained in:
Beniamino Galvani 2025-06-05 10:28:07 +02:00
parent c88d75ac6a
commit ddfc2696e3
1 changed files with 7 additions and 0 deletions
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7
src/core/devices/nm-device.c
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@ -14050,6 +14050,13 @@ can_reapply_change(NMDevice *self,
goto out_fail;
}
if (nm_streq(setting_name, NM_SETTING_SRIOV_SETTING_NAME)) {
return nm_device_hash_check_invalid_keys(diffs,
NM_SETTING_SRIOV_SETTING_NAME,
error,
NM_SETTING_SRIOV_PRESERVE_ON_DOWN);
}
out_fail:
g_set_error(error,
NM_DEVICE_ERROR,