linux/tools/usb/usbip/libsrc
Zongmin Zhou cfcd7b29e5 usbip: tools: add hint when no exported devices are found
When refresh_exported_devices() finds no devices, it's helpful to
inform users about potential causes. This could be due to:

1. The usbip driver module is not loaded.
2. No devices have been exported yet.

Add an informational message to guide users when ndevs == 0.

Also update the condition in usbip_host_driver_open() and
usbip_device_driver_open() to check both ret and ndevs == 0,
and change err() to info().

Message visibility by scenario:
- usbipd (console mode): Show on console/serial, this allows instant
  visibility for debugging.
- usbipd -D (daemon mode): Message logged to syslog, can keep logs for
  later traceability in production. Also can use "journalctl -f" to
  trace on console.

Suggested-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Zongmin Zhou <zhouzongmin@kylinos.cn>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://patch.msgid.link/20260402083204.53179-1-min_halo@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2026-04-11 12:02:00 +02:00
..
list.h tools: usbip: list.h: fix kernel-doc for list_del() 2021-03-26 14:27:33 +01:00
Makefile.am License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
names.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
names.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
sysfs_utils.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sysfs_utils.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
usbip_common.c usbip: tools: fix GCC8 warning for strncpy 2019-07-25 18:12:20 +02:00
usbip_common.h usbip: tools: add more error codes for usbip request/reply messages 2018-03-09 09:17:08 -08:00
usbip_device_driver.c usbip: tools: add hint when no exported devices are found 2026-04-11 12:02:00 +02:00
usbip_device_driver.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
usbip_host_common.c usbip: tools: add hint when no exported devices are found 2026-04-11 12:02:00 +02:00
usbip_host_common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
usbip_host_driver.c usbip: tools: add hint when no exported devices are found 2026-04-11 12:02:00 +02:00
usbip_host_driver.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
vhci_driver.c usbip: fix vhci_hcd controller counting 2018-10-02 12:05:29 -07:00
vhci_driver.h usbip: dynamically allocate idev by nports found in sysfs 2018-05-31 12:43:14 +02:00