libusb: hotplug, use events instead of a timer when possible

Try to fetch events from nlsysevent or devd to determine when
to scan the usb bus for devices addition or removal.
if none are available

libusb: hotplug, use events instead of a timer when possible

Try to fetch events from nlsysevent or devd to determine when
to scan the usb bus for devices addition or removal.
if none are available fallback on the regular timer based (4s)
scanner

if devd socket or netlink socket is closed or error fallback on the
timer based method.

Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D48300

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Remove $FreeBSD$: one-line .c comment pattern

Remove /^/[*/]\s*\$FreeBSD\$.*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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MFHead @349476

Sponsored by: The FreeBSD Foundation

Fix support for LIBUSB_HOTPLUG_ENUMERATE in libusb. Currently all
devices are enumerated regardless of of the LIBUSB_HOTPLUG_ENUMERATE
flag. Make sure when the flag is not specified no arrival events

Fix support for LIBUSB_HOTPLUG_ENUMERATE in libusb. Currently all
devices are enumerated regardless of of the LIBUSB_HOTPLUG_ENUMERATE
flag. Make sure when the flag is not specified no arrival events are
generated for currently enumerated devices.

MFC after: 3 days
Sponsored by: Mellanox Technologies

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MFH r338661 through r339200.

Sponsored by: The FreeBSD Foundation

Merge ^/head r338595 through r338689, and resolve conflicts.

Improve LibUSB debugging by simultaneously allowing both function
and transfer prints. Make sure the debug level comes from the
correct USB context.

Found by: Ludovic Rousseau <ludovic.rousseau+fre

Improve LibUSB debugging by simultaneously allowing both function
and transfer prints. Make sure the debug level comes from the
correct USB context.

Found by: Ludovic Rousseau <ludovic.rousseau+freebsd@gmail.com>
PR: 231264
MFC after: 1 week
Approved by: re (kib)
Sponsored by: Mellanox Technologies

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Fix issues about cancelling USB transfers in LibUSB when the USB device has
been detached. When a USB device has been detached the kernel file handle
stops responding to commands. USB applications wh

Fix issues about cancelling USB transfers in LibUSB when the USB device has
been detached. When a USB device has been detached the kernel file handle
stops responding to commands. USB applications which continue to run after
the USB device has been detached, depend on LibUSB generated events to tear
down its pending USB transfers. Add code to handle the needed cleanup when
processing the USB transfer(s) fails and prevent new USB transfer(s) from
being submitted.

Found by: Ludovic Rousseau <ludovic.rousseau+freebsd@gmail.com>
PR: 231076
MFC after: 1 week
Approved by: re (gjb)
Sponsored by: Mellanox Technologies

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lib: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
pr

lib: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

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Resolve issue with libusb C++ header file inclusion.

Approved by: re (marius)
PR: 210509
MFC after: 1 week

Add support for USB streams to the LibUSB v1.0 API and update the
libusb(3) manual page.

Approved by: re (gjb)
Requested by: swills
MFC after: 1 week

Implement libusb_hotplug_register_callback() and
libusb_hotplug_deregister_callback() for the LibUSB v1.0 API and
update the libusb(3) manual page.

Approved by: re (kib)
Requested by: swills
MFC aft

Implement libusb_hotplug_register_callback() and
libusb_hotplug_deregister_callback() for the LibUSB v1.0 API and
update the libusb(3) manual page.

Approved by: re (kib)
Requested by: swills
MFC after: 1 week

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IFC @253398

Merge fresh head.

sync from head

MFC @248461

- Make the FreeBSD's USB library compile under Linux.
- Fix a compile warning where the return value of a call
to a write() function was ignored.
- Remove redundant include files from userland USB he

- Make the FreeBSD's USB library compile under Linux.
- Fix a compile warning where the return value of a call
to a write() function was ignored.
- Remove redundant include files from userland USB header files.
- Add some now needed include files to various C-files.

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IFH@204581

Merge from head at r201628.

# This hasn't been tested, and there are at least three bad commits
# that need to be backed out before the branch will be stable again.

MFC r199575

- fix a transfer cancelling bug/segfault [1]
- correct a return code in the transfer cancel function.
- add new API function, libusb20_tr_bulk_intr_sync().

Submitted by: HPS
Rep

MFC r199575

- fix a transfer cancelling bug/segfault [1]
- correct a return code in the transfer cancel function.
- add new API function, libusb20_tr_bulk_intr_sync().

Submitted by: HPS
Reported by: Robert Jenssen [1]

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Sync to P4
- fix a transfer cancelling bug/segfault [1]
- correct a return code in the transfer cancel function.
- add new API function, libusb20_tr_bulk_intr_sync().

Submitted by: HPS
Reported b

Sync to P4
- fix a transfer cancelling bug/segfault [1]
- correct a return code in the transfer cancel function.
- add new API function, libusb20_tr_bulk_intr_sync().

Submitted by: HPS
Reported by: Robert Jenssen [1]

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Merge from head

- MFC @196061

LibUSB v1.0:

- Significantly improve libusb10 support.
- Many minor issues fixed.
- P4 ID: 166189, 165853, 165991, 166052, 166069

Submitted by: hps
Approved by: re