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#!/usr/bin/python3
# SPDX-License-Identifier: LGPL-2.1-or-later
import json
import sys
config = json.load(sys.stdin)
config["QemuDrives"] += [
{
"Id": "drive0",
"Size": "64M",
"Options": "cache=unsafe",
}
]
config["QemuArgs"] += ["-device", "pci-bridge,id=pci_bridge0,chassis_nr=64"]
# Create 25 additional PCI bridges, each one connected to the previous one
# (basically a really long extension cable), and attach a virtio drive to
# the last one. This should force udev into attempting to create a device
# unit with a _really_ long name.
for bridge in range(1, 26):
config["QemuArgs"] += [
"-device",
f"pci-bridge,id=pci_bridge{bridge},bus=pci_bridge{bridge - 1},"
f"chassis_nr={64 + bridge}"
]
config["QemuArgs"] += ["-device", f"virtio-blk-pci,drive=drive0,scsi=off,bus=pci_bridge25"]
json.dump(config, sys.stdout)
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