69 lines
2.6 KiB
Python
69 lines
2.6 KiB
Python
# Copyright 2022 Mark Hargreaves, Luca Weiss
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# SPDX-License-Identifier: GPL-3.0-or-later
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import logging
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import os
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import socket
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import time
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import pmb.chroot.root
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import pmb.helpers.run
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def start_nbd_server(args, ip="172.16.42.2", port=9999):
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"""
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Start nbd server in chroot_native with pmOS rootfs.
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:param ip: IP address to serve nbd server for
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:param port: port of nbd server
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"""
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pmb.chroot.apk.install(args, ['nbd'])
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chroot = f"{args.work}/chroot_native"
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rootfs_path = f"/mnt/pmbootstrap-netboot/{args.device}.img"
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if not os.path.exists(chroot + rootfs_path) or args.replace:
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rootfs_path2 = f"/home/pmos/rootfs/{args.device}.img"
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if not os.path.exists(chroot + rootfs_path2):
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raise RuntimeError("The rootfs has not been generated yet, please "
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"run 'pmbootstrap install' first.")
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if args.replace and not \
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pmb.helpers.cli.confirm(args, f"Are you sure you want to "
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f"replace the rootfs for "
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f"{args.device}?"):
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return
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pmb.chroot.root(args, ["cp", rootfs_path2, rootfs_path])
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logging.info(f"NOTE: Copied device image to {args.work}"
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f"/images_netboot/. The image will persist \"pmbootstrap "
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f"zap\" for your convenience. Use \"pmbootstrap netboot "
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f"serve --help\" for more options.")
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logging.info(f"Running nbd server for {args.device} on {ip} port {port}.")
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while True:
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logging.info("Waiting for postmarketOS device to appear...")
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# Try to bind to the IP ourselves before handing it to nbd-servere
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# This is purely to improve the UX as nbd-server just quits when it
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# cannot bind to an IP address.
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test_socket = socket.socket()
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while True:
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try:
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test_socket.bind((ip, 9998))
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except OSError as e:
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if e.errno != 99: # Cannot assign requested address
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raise e
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# Wait a bit before retrying
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time.sleep(0.5)
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continue
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test_socket.close()
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break
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logging.info("Found postmarketOS device, serving image...")
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pmb.chroot.root(
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args, ["nbd-server", f"{ip}@{port}", rootfs_path, "-d"],
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check=False, disable_timeout=True)
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logging.info("nbd-server quit. Connection lost?")
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# On a reboot nbd-server will quit, but the IP address sticks around
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# for a bit longer, so wait.
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time.sleep(5)
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