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udev: mark the SRIO-V functions as unamanged by NetworkManager #1622

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udev: mark the SRIO-V functions as unamanged by NetworkManager #1622

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4 changes: 4 additions & 0 deletions config/68-azure-sriov-nm-unmanaged.rules
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
# Accelerated Networking on Azure exposes a new SRIOV interface to the VM.
# This interface is transparently bonded to the synthetic interface,
# so NetworkManager should just ignore any SRIOV interfaces.
SUBSYSTEM=="net", DRIVERS=="hv_pci", ACTION=="add", ENV{NM_UNMANAGED}="1"
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Suggested change
SUBSYSTEM=="net", DRIVERS=="hv_pci", ACTION=="add", ENV{NM_UNMANAGED}="1"
SUBSYSTEM=="net", DRIVERS=="hv_pci", ACTION=="add|change|move", ENV{NM_UNMANAGED}="1"

I was testing out a version of this over in coreos/fedora-coreos-config#2176 and wasn't observing NM_UNMANAGED=1 getting set in the initramfs until I added the change|move, which is what is done over in https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/38d3834e2c464bd4820392800a3a1fe3f286fc62/data/85-nm-unmanaged.rules#L5

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@lkundrak WDYT?

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I would NOT recommend this change without a driver check (mlx4, mlx5). There is potential for hv_pci devices to be managed. We're working on a better story wrt MANA: https://learn.microsoft.com/en-us/azure/virtual-network/accelerated-networking-mana-linux

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@cjp256 do you have an example modification to this rule to achieve that goal?

1 change: 1 addition & 0 deletions setup.py
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Expand Up @@ -72,6 +72,7 @@ def set_openbsd_rc_files(data_files, dest="/etc/rc.d/",

def set_udev_files(data_files, dest="/etc/udev/rules.d/",
src=["config/66-azure-storage.rules",
"config/68-azure-sriov-nm-unmanaged.rules",
"config/99-azure-product-uuid.rules"]):
data_files.append((dest, src))

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