Authorize and show tbt devices automatically:

./verify_tbt_sysfs.sh
...
0-1 contains 2 tbt devices.
device_topo: no_name <-> AKiTiO Thunder3 Duo Pro <-> ThinkPad Thunderbolt 3 Dock
file_topo  : 0-0     <-> 0-1                     <-> 0-101
0-3 contains 0 tbt devices.
1-1 contains 0 tbt devices.
1-3 contains 0 tbt devices.

|20230613-111233.433494150|TRACE|Discrete or FW CM on TGLS,root:0000:00:07.0, /sys/devices/pci0000:00/0000:00:07.0|
|20230613-111233.436216796|TRACE|TBT ROOT:0000:00:07.0 SYS_PATH:/sys/devices/pci0000:00/0000:00:07.0|
PF_BIOS: platform, ROOT_PCI:0000:00:07.0
Upstream pci:0000:02:00.0
Upstream pci:0000:06:00.0
0-1:AKiTiO Thunder3 Duo Pro
 |-> /dev/sdb HDD pci-04:00 INTEL_SSDSC2BW080A4_BTDA337402UU0806GN
0-101:ThinkPad Thunderbolt 3 Dock
 |-> /dev/sda USB2.0 pci-08:00 Netac_OnlyDisk_2A9E6BA269ED54332A5F5B92
 |-> /dev/sdc USB3.0 pci-08:00 SanDisk_Cruzer_Glide_3.0_4C530001320801100511

Could use usb4 swich to control 1 USB3/4 device plug or unplug

usb4switch: https://mcci.com/usb/dev-tools/model-3141/ 
cd usb4switch3141/
./usb4switch.sh  [1|2|0 or off|s|h|*]
  1    Connect host port to port 1 with super speed
  2    Connect host port to port 2 with super speed
  0|off  Disconned all ports with host port
  s    Check current status
  hot  One round port 1, 2 and disconnect test
  h|*  Show this and show status

Some other tips

---

tbt_cases.sh is just a text file which saved the tbt driver cases. pdf.sh is a script to generate the pdf for tbt_cases.sh or some other text file. Thanks Westerberg Mika's advice! grep -H . /sys/bus/thunderbolt/devices// 2>/dev/null

Refer more information in https://github.com/xupengfe/tbt_driver_cases

Could buy one USB4 device in market by below link for validation: thunderbolt4 docker https://eshop.macsales.com/shop/owc-thunderbolt-dock $249

verify_tbt_sysfs.sh: ls -l /sys/bus/thunderbolt/devices/domain*0 2>/dev/null
| grep "-"
| grep -v ":"
| awk '{ print length(), $0 | "sort -n" }'
| tail -n 1
| awk -F "domain0/" '{print $2}'
| tr '/' ' '

ls -l /sys/bus/thunderbolt/devices/domain*0 2>/dev/null
| grep "-"
| awk -F "domain0" '{print $2}'
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2
| tr '/' ' '

domains ls /sys/bus/thunderbolt/devices/
| grep "domain"
| grep -v ":"
| awk -F "domain" '{print $2}'
| awk -F "->" '{print $1}'

tbt_sys_file ls -l /sys/bus/thunderbolt/devices/1*3 2>/dev/null
| grep "-"
| awk -F "domain1/" '{print $2}'
| awk '{ print length(), $0 | "sort -n" }'
| grep -v ":"
| cut -d ' ' -f 2
| tr '/' ' ' 1-0 1-3 1-0 1-3 1-303 1-0 1-3 1-303 1-10303

ls -l /sys/bus/thunderbolt/devices/1*1 2>/dev/null
| grep "-"
| awk -F "domain1/" '{print $2}'

ls -l /sys/bus/thunderbolt/devices/1*3 2>/dev/null
| grep "-"
| grep -v ":"
| awk -F "domain1/" '{print $2}'
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2
| tr '/' ' '

ls -l /sys/bus/thunderbolt/devices/1*1 2>/dev/null
| grep "-"
| awk -F "domain1/" '{print $2}'
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2
| tr '/' ' ' 1-0 usb4_port3 1-0:3.1

so need to add " grep -v ":" | grep -v "_" "

tbt_devs ls /sys/bus/thunderbolt/devices/ 2>/dev/null
| grep "-"
| grep "^1"
| grep "3$"
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2 1-3 1-303 1-10303

ls /sys/bus/thunderbolt/devices/ 2>/dev/null
| grep "-"
| grep -v ":"
| grep "^1"
| grep "1$"
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2

ls /sys/bus/thunderbolt/devices/ 2>/dev/null
| grep "-"
| grep -v ":"
| grep "^1"
| grep "3$"
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2

device_num ls /sys/bus/thunderbolt/devices/
| grep "^1"
| grep "3$"
| wc -l

dr_pci_h udevadm info -q path --path=/sys/bus/thunderbolt/devices/domain1
| awk -F "/" '{print $(NF-1)}'
| cut -d ':' -f 3

ls /sys/bus/thunderbolt/devices/
| grep "-"
| grep -v "-0"
| grep -v ":"
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2
| head -n1

get like 1-3

tbt_dev=$(ls ${TBT_PATH}
| grep "$REGEX_DEVICE"
| grep -v "$HOST_EXCLUDE"
| grep -v ":"
| awk '{ print length(), $0 | "sort -n" }'
| cut -d ' ' -f 2
| head -n1)

udevadm info --attribute-walk --path=/sys/bus/thunderbolt/devices/1-3 | grep KERNEL | tail -n 2 | grep -v pci0000 | cut -d """ -f 2

ls -1 /sys/bus/pci/devices

0000:00:00.0 0000:00:02.0 0000:00:04.0 0000:00:06.0 0000:00:07.0 0000:00:07.1 0000:00:07.2 0000:00:07.3 0000:00:08.0 0000:00:0a.0 0000:00:0d.0 0000:00:0d.2 0000:00:0d.3 0000:00:14.0 0000:00:14.2 0000:00:15.0 0000:00:15.1 0000:00:15.2 0000:00:15.3 0000:00:16.0 0000:00:17.0 0000:00:19.0 0000:00:19.1 0000:00:1e.0 0000:00:1e.3 0000:00:1f.0 0000:00:1f.4 0000:00:1f.5 0000:00:1f.6 0000:01:00.0

Could test some file transfer basic function tests under USB2/3.0 connected with USB4 docker.