devmatch: Catch truncated linker hints files

PR: 282268
Reviewed by: christos, imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D47243

(cherry picked from commit 9b2f2fbfcb

devmatch: Catch truncated linker hints files

PR: 282268
Reviewed by: christos, imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D47243

(cherry picked from commit 9b2f2fbfcbc51f77e96a41e62b1c06a8ccd4ca15)

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Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

devmatch: introduce quiet command line option

In setups without hints whatsoever one can get a long list of
"Can't read linker hints file" error messages during boot.
Add a -q/--quiet option which w

devmatch: introduce quiet command line option

In setups without hints whatsoever one can get a long list of
"Can't read linker hints file" error messages during boot.
Add a -q/--quiet option which would suppress the noise and leave
space for more essential information.

While here switch to a pre-defined exit code from sysexits.

MFC after: 4 weeks
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D41443

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devmatch: Properly ignore commented fields

Any field that starts with # is a commented out field (there as a place
holder only, the data in that place holder is completely ignored). The
previous cod

devmatch: Properly ignore commented fields

Any field that starts with # is a commented out field (there as a place
holder only, the data in that place holder is completely ignored). The
previous code improperly detected this using strcmp. Instead, any field
whose names starts with '#' is ignored.

Differential Reivsion: https://reviews.freebsd.org/D34633

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devmatch: Ignore the pnp fields tagged as ignore ('#')

When matching entries, we should ignore those with a name of '#'. It's
the standard way to skip elements and need to be present to have the
pro

devmatch: Ignore the pnp fields tagged as ignore ('#')

When matching entries, we should ignore those with a name of '#'. It's
the standard way to skip elements and need to be present to have the
proper offsets to the fields that are observed. No bus has a pnp
attribute of '#' and that is now disallowed for future buses that are
written.

Sponsored by: Netflix
Reviewed by: kbowling
Differential Revision: https://reviews.freebsd.org/D31482

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devmatch(8): Respect mask field when matching strings of Z type.

While here, add debug output for this action.

Reviewed by: imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org

devmatch(8): Respect mask field when matching strings of Z type.

While here, add debug output for this action.

Reviewed by: imp
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D26823

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Regularize the Netflix copyright

Use recent best practices for Copyright form at the top of
the license:
1. Remove all the All Rights Reserved clauses on our stuff. Where we
piggybacked others, u

Regularize the Netflix copyright

Use recent best practices for Copyright form at the top of
the license:
1. Remove all the All Rights Reserved clauses on our stuff. Where we
piggybacked others, use a separate line to make things clear.
2. Use "Netflix, Inc." everywhere.
3. Use a single line for the copyright for grep friendliness.
4. Use date ranges in all places for our stuff.

Approved by: Netflix Legal (who gave me the form), adrian@ (pmc files)

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Add in a missing newline

In the conversion, the newline got stripped. It worked fine when there
was only one module, but not when there are many. Add back the missing
newline.

Approved by: re@ (kib

Add in a missing newline

In the conversion, the newline got stripped. It worked fine when there
was only one module, but not when there are many. Add back the missing
newline.

Approved by: re@ (kib)
PR: 230868
Differential Revision: https://reviews.freebsd.org/D16895

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When trying to match the nomatch event passed to us, attempt to look
up the device described by the nomatch event in the device tree. If we
find it, then if the device is marked as have already attac

When trying to match the nomatch event passed to us, attempt to look
up the device described by the nomatch event in the device tree. If we
find it, then if the device is marked as have already attached to a
device once, then ignore the device.

This keeps us from reloading the device driver when it has just been
manually unloaded. All devies that have had a driver attach to them at
least once no longer participate in pnp-based autoloading.

Differential Revision: https://reviews.freebsd.org/D16735

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Add a new device flag: DF_ATTACHED_ONCE

This flag is set once the device has been successfully attached. When
set, it inhibits devmatch from trying to match the device. This in
turn allows kldunload

Add a new device flag: DF_ATTACHED_ONCE

This flag is set once the device has been successfully attached. When
set, it inhibits devmatch from trying to match the device. This in
turn allows kldunload to work as expected. Prior to the change, the
driver would immediately reload because devmatch had no notion that
the driver had once been attached, and therefore shouldn't participate
in further matching.

Differential Revision: https://reviews.freebsd.org/D16735

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Remove sorting of matches and print all the matches as we find them.

This backs out the hack we added in r329458. Now that we can freeze /
thaw probing, this is a much better solution to that proble

Remove sorting of matches and print all the matches as we find them.

This backs out the hack we added in r329458. Now that we can freeze /
thaw probing, this is a much better solution to that problem. Revert
to simply printing the results as we find them, and relying on an
external sort | uniq to clean up the list.

Differential Revision: https://reviews.freebsd.org/D16735

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Exit with an error if a linker hints file can't be found.

Continuing with a NULL hints variable just triggers a segfault later on.
The other error cases in this function all exit for an error rather

Exit with an error if a linker hints file can't be found.

Continuing with a NULL hints variable just triggers a segfault later on.
The other error cases in this function all exit for an error rather than
warning.

Reviewed by: imp
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D15579

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More verbose output.

Print more info for -v runs and temp hack for usb vs uhub

Despite best efforts to regularize, there's a few tables in the system
that still report they are for bus usb when they are really for bus
u

Print more info for -v runs and temp hack for usb vs uhub

Despite best efforts to regularize, there's a few tables in the system
that still report they are for bus usb when they are really for bus
uhub (where usb devices attach). Add a temporary workaround for this
until these places have been eliminated (likely my fault).

Second, when running verbose, describe what we're doing when
searching. This output can be quite long, but says exactly what's
going on (this output is to stdout, so it's useless for scripting).

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Fix USB driver matching in devmatch(8).

Multiple drivers can match on the same USB device and the order of loading
decides which driver gets the device. Use the supplied mask value as an
indication

Fix USB driver matching in devmatch(8).

Multiple drivers can match on the same USB device and the order of loading
decides which driver gets the device. Use the supplied mask value as an
indication of priority, so that vendor specific device drivers are loaded
before more generic ones.

Sponsored by: Mellanox Technologies

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Implement --hints to read hints file directly

In testing, it's often useful to copy a few files into a directory and
kldxref them to ensure that particular cases are handled correctly.
Add --hints (

Implement --hints to read hints file directly

In testing, it's often useful to copy a few files into a directory and
kldxref them to ensure that particular cases are handled correctly.
Add --hints (-h) to facilitate this testing and enable future
automated testing.

Sponsored by: Netflix

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Add option to parse NOMATCH event and suggest modules to load

Add --nomatch/-p to search for individual drivers based on a NOMATCH
event from devd.

Submitted by: hps (earlier version)
Sponsored by:

Add option to parse NOMATCH event and suggest modules to load

Add --nomatch/-p to search for individual drivers based on a NOMATCH
event from devd.

Submitted by: hps (earlier version)
Sponsored by: Netflix

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Tweak the 'I' flagged value

'I' was omitting 'zero' values. This is not quite correct, and was put
in as a hack but not documented. Remove it. If we find what the hack
was really needed for, we'll e

Tweak the 'I' flagged value

'I' was omitting 'zero' values. This is not quite correct, and was put
in as a hack but not documented. Remove it. If we find what the hack
was really needed for, we'll either fix the need for it, or invent a
new flagged value type.

Submitted by: hps@
Sponsored by: Netflix

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Implement 'T' field matching.

Implement 'T' field matching. This is needed to prevent false
positives. However, it's not general enough. It only handles one field
and there's a ton of edge cases eve

Implement 'T' field matching.

Implement 'T' field matching. This is needed to prevent false
positives. However, it's not general enough. It only handles one field
and there's a ton of edge cases even with that it likely wouldn't
handle. To do it more generally and also eliminate a lot of the
hackiness that's in this program now, we'd need to creating
directories for lookups ala awk, pearl, python, etc. It appears to be
sufficient, though, to get my keyboard loaded on boot.

Sponsored by: Netflix

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Warn when we encounter unknown PNP field specifiers.

The 'T' field went unimplemented for months due to a lack of warning.
Add a warnings to detect mistakes sooner.

Sponsored by: Netflix

Move devmatch to sbin from usr/sbin.

Since we want to use devmatch in context before a split /,/usr system
has mounted /usr, move devmatch to /sbin.

Sponsored by: Netflix