[RFC] Advice re auto-extroot for EcoNet platform

[Caleb James DeLisle]

Update:

I have gotten something working.

1. I have a patch which adds BUILTIN_KMODS, making all kmod packages to 
become kernel builtins

2. I have a preinit script to ensure there is a block device in /dev for 
any disk with PARTNAME=rootfs_data


This works most of the time, but occasionally the USB device fails to 
register until after mount_root(see dmesg below).


What I'm thinking about doing is adding a hotplug.d script which reboots 
the device in that case, and this can also partition an empty device. 
Then I should be able to make this as a package.


Thanks,

Caleb


[    2.763207] scsi 0:0:0:0: Direct-Access     USB      Disk             
2.10 PQ: 0 ANSI: 2
[    2.784567] sd 0:0:0:0: [sda] 1022464 512-byte logical blocks: (524 
MB/499 MiB)
[    2.794943] sd 0:0:0:0: [sda] Write Protect is off
[    2.802288] sd 0:0:0:0: [sda] No Caching mode page found
[    2.807647] sd 0:0:0:0: [sda] Assuming drive cache: write through
[    2.878976] r8152-cfgselector 1-2.1: reset high-speed USB device 
number 4 using xhci-mtk
[    4.339676] r8152 1-2.1:1.0 eth0: v1.12.13
[    4.388681] random: crng init done
[    4.478821] usb 1-2.4: new high-speed USB device number 5 using xhci-mtk
[    4.759125] usb-storage 1-2.4:1.0: USB Mass Storage device detected
[    4.767230] scsi host1: usb-storage 1-2.4:1.0
Press the [f] key and hit [enter] to enter failsafe mode
Press the [1], [2], [3] or [4] key and hit [enter] to select the debug level
[    5.818867] scsi 1:0:0:0: Direct-Access     Multi    Flash Reader     
1.00 PQ: 0 ANSI: 0
[    5.868796] sd 1:0:0:0: [sdb] Media removed, stopped polling
[    5.875152] sd 1:0:0:0: [sdb] Attached SCSI removable disk
[    7.088867] r8152 1-2.1:1.0 eth0: carrier on
[    9.291450] mount_root: no usable overlay filesystem found, using 
tmpfs overlay
[    9.303630] urandom-seed: Seed file not found (/etc/urandom.seed)
[    9.913945] procd: - early -
[   10.632452] procd: - ubus -
[   10.816972] procd: - init -
Please press Enter to activate this console.
[   12.222074] kmodloader: loading kernel modules from /etc/modules.d/*
[   12.360596] kmodloader: done loading kernel modules from /etc/modules.d/*
[   13.584036] urngd: v1.0.2 started.
[   33.348852] usb 1-1: reset high-speed USB device number 2 using xhci-mtk
[   33.978962] Alternate GPT is invalid, using primary GPT.
[   33.984378]  sda: sda1
[   33.987203] sd 0:0:0:0: [sda] Attached SCSI removable disk