raspberrypi
/sys/class/udc/<device>/state hangs on "not attached"
Describe the bug
Hi I put in place "USB mass storage gadget",
working well, until you use mass storage content and the /sys/class/udc/
Unfortunately, after 8-10 hours with no usage, it becomes "not attached" and hangs.
Power cycle the device on the other part of the usb cable does not change the situation,
and it should be... so /sys/class/udc/
The only way to get back udc running correctly, is shutdown -r now, so it comes back working and it still goes on working correctly (you can connect or disconnect usb cable and state of udc change correctly and accordingly) until you stop accessing mass storage content for several hours.
Resetting usb ports or hubs does not affect the "state", even power down and up usb controllers or hubs or ports.
Thank you so much in advance.
Steps to reproduce the behaviour
Pi4B out-of-the-box
installed 2023-12-05-raspios-bookworm-arm64-full
enabled SSH
disabled wifi and BT sudo nano /boot/firmware/config.txt Add dtoverlay=disable-wifi under [all] to disable Wi-Fi. Add dtoverlay=disable-bt under [all] to disable Bluetooth. checked > OK
disabled Desktop GUI (I don't want it and don't need it) sudo raspi-config
System Options
Boot/Auto Login
B1 Console Text console, requiring user to login
OK
Exit and confirming to REBOOT
Enabled the USB driver
a)
sudo nano /boot/config.txt
Scroll to the bottom and append the line below:
dtoverlay=dwc2
Press CTRL+O followed by Enter to save, and then CTRL+X to quit.
b)
sudo nano /etc/modules
Append the line below, just after the i2c-dev line:
dwc2
Press CTRL+O followed by Enter to save, and then CTRL+X to quit.
created a large file to act as the storage medium on the SD card sudo dd bs=1M if=/dev/zero of=/piusb.bin count=87040
87040+0 records in
87040+0 records out
91268055040 bytes (91 GB, 85 GiB) copied, 2629.26 s, 34.7 MB/s
NOTE: of course, the Guide I followed reported an example; I needed and created a different, bigger container file
checked > OK
formatted the container file as a FAT32 file system
sudo mkdosfs /piusb.bin -F 32 -I mkfs.fat 4.2 (2021-01-31)
checked > OK
Mounted the container file
First, created a folder on which we can mount the file system:
sudo mkdir /mnt/usb_share
Added this to fstab, the configuration fi le that records our available disk partitions:
sudo nano /etc/fstab
Appended the line below to the end of the file:
/piusb.bin /mnt/usb_share vfat users,umask=000 0 2
NOTE: sudo mount -a >> differently from the guide, returned to me a message inviting to use instead
"sudo systemctl daemon-reload" >> DID IT >> good, checked >> OK
Downloaded a test file
cd /mnt/usb_share
sudo wget http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4
--2024-01-21 19:24:38-- http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4
Resolving commondatastorage.googleapis.com (commondatastorage.googleapis.com)... 142.250.180.155, 142.251.209.27, 142.251.209.59, ...
Connecting to commondatastorage.googleapis.com (commondatastorage.googleapis.com)|142.250.180.155|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 158008374 (151M) [video/mp4]
Saving to: ‘BigBuckBunny.mp4’
BigBuckBunny.mp4 100%[===================>] 150.69M 11.4MB/s in 14s
2024-01-21 19:24:51 (11.1 MB/s) - ‘BigBuckBunny.mp4’ saved [158008374/158008374]
checked > OK
flushed any cached data to the disk
sync
done > OK
Tested mass storage device mode
sudo modprobe g_mass_storage file=/piusb.bin stall=0 removable=y
checked > OK
NOTE: in the guide you will see "sudo modprobe g_mass_storage file=/piusb.bin stall=0 ro=1", that will worked too,
but, given I need a read/write and not a read-only device, I changed it to "removable=y"
sudo modprobe -r g_mass_storage
checked > OK
LOG:
[Jan22 17:58] Mass Storage Function, version: 2009/09/11
[ +0.000018] LUN: removable file: (no medium)
[ +0.000058] LUN: removable file: /piusb.bin
[ +0.000005] Number of LUNs=1
[ +0.000153] g_mass_storage gadget.0: Mass Storage Gadget, version: 2009/09/11
[ +0.000008] g_mass_storage gadget.0: userspace failed to provide iSerialNumber
[ +0.000004] g_mass_storage gadget.0: g_mass_storage ready
[ +0.000008] dwc2 fe980000.usb: bound driver g_mass_storage
enabled Samba
sudo apt-get update
sudo apt-get install samba winbind -y
sudo nano /etc/samba/smb.conf
Scrolled down to the end of the file and append the lines below:
[usb]
browseable = yes
path = /mnt/usb_share
guest ok = yes
read only = no
create mask = 777
saved and exit
then:
sudo systemctl restart smbd.service
then:
cat /etc/hostname
inserted my private hostname
checked access by Windows10 >> perfect OK
I see two shared folders:
nobody
(never touched, I don't know what it is)
usb
(the good one: it contains all my files and work like a charm)
Automated USB device reconnect
sudo pip3 install watchdog >> NOTE1: unfortunately, as for Raspberry original documentation
(I discovered after my setup) this command doesn't work, but I did not know and I solved,
googling around with this one:
sudo pip install watchdog --break-system-packages
checked pip package installation and working > OK
As for the guide:
"We then need some code to start a timer whenever something changes in the shared folder. The timer is reset to zero every time a new change occurs, and the USB reconnect is only triggered if we see 30 seconds of inactivity after a change."
We’ve written a program to do this. To download it, type:
cd /usr/local/share
sudo wget http://rpf.io/usbzw -O usb_share.py
sudo chmod +x usb_share.py
done > OK
NOTE2:
for the reason I written before, I had to edit this usb_share.py script, this way:
sudo nano usb_share.py
changed from "modprobe g_mass_storage file=/piusb.bin stall=0 ro=1"
to
"modprobe g_mass_storage file=/piusb.bin stall=0 removable=y"
checked reboot > checked loading script, changing files, view update of the folder >> all working with no issue
NEXT STEP, mine specific step (the reason I bought Pi4B is to have a "customizable via script" usb mass storage):
created a test_rename_script in python in order to
test renaming of 3 file inside the root my usb mass storage container file, one time per day, in the middle of the night
done, checked > OK
created a rename_all_script in python in order to
renaming file every file inside the root my usb mass storage container file, one time per day, in the middle of the night
done, checked > OK
mkdir myscripts
put these scripts here
setting up Cron and its log
installed rsyslog
sudo apt install rsyslog
sudo nano /etc/rsyslog.conf
cron.* /var/log/cron.log
checked Cron execution and log > OK
coming back to the Guide I followed: Background service We need to make this program into a background service, so that it starts automatically at boot time. We can do that by making it into a systemd unit. Enter the commands below:
cd /etc/systemd/system
sudo nano usbshare.service
This will start a new blank file. In the new file, enter:
[Unit]
Description=USB Share Watchdog
[Service]
Type=simple
ExecStart=/usr/local/share/usb_share.py
Restart=always
[Install]
WantedBy=multi-user.target
Press CTRL+O followed by Enter to save, and then CTRL+X to quit.
Now we need to register the service, enable it, and set it running:
sudo systemctl daemon-reload
sudo systemctl enable usbshare.service
sudo systemctl start usbshare.service
Whenever you copy files over to the network share, the USB device should automatically reconnect after 30 seconds of inactivity.
done, checked > OK
Device (s)
Raspberry Pi 4 Mod. B
System
Raspberry Pi reference 2023-12-05 Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 70cd6f2a1e34d07f5cba7047aea5b92457372e05, stage5
Oct 17 2023 15:39:16 Copyright (c) 2012 Broadcom version 30f0c5e4d076da3ab4f341d88e7d505760b93ad7 (clean) (release) (start)
Linux casettapi 6.1.0-rpi7-rpi-v8 #1 SMP PREEMPT Debian 1:6.1.63-1+rpt1 (2023-11-24) aarch64 GNU/Linux
Logs
No response
Additional context
No response
I am not a linux guru, so maybe something could be not so well described so, if you need, please ask to me everything you need..
I miss to mention : dmesg sees correctly power on of the device that should access to mass storage.