Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

kqueue tests: Add new EVFILT_TIMER regression tests from upstream

One of the tests exposes the regression reported in PR 264131.

One test is disabled because FreeBSD does not support setting EV_ONE

kqueue tests: Add new EVFILT_TIMER regression tests from upstream

One of the tests exposes the regression reported in PR 264131.

One test is disabled because FreeBSD does not support setting EV_ONESHOT
on an already-added periodic timer. Though, in this case the flag is
simply ignored, which isn't ideal.

One test is slightly modified to set EV_ADD when reconfiguring a
disabled timer per some commentary in PR 258412.

Ideally we would re-import the test suite from libkqueue but there is a
fair bit of divergence so this will require some effort. This just gets
us one small step closer while increasing test coverage.

PR: 258412
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation

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kqueue: fix recent assertion

NOTE_ABSTIME may also have a zero timeout, which indicates that we
should still fire immediately as an absolute time in the past. A test
has been added for this one as

kqueue: fix recent assertion

NOTE_ABSTIME may also have a zero timeout, which indicates that we
should still fire immediately as an absolute time in the past. A test
has been added for this one as well.

Fixes: 9c999a259f00 ("kqueue: don't arbitrarily restrict long-past...")
Point hat: kevans
Reported by: syzbot+1c8d1154f560b3930042@syzkaller.appspotmail.com

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kqueue: don't arbitrarily restrict long-past values for NOTE_ABSTIME

NOTE_ABSTIME values are converted to values relative to boottime in
filt_timervalidate(), and negative values are currently rejec

kqueue: don't arbitrarily restrict long-past values for NOTE_ABSTIME

NOTE_ABSTIME values are converted to values relative to boottime in
filt_timervalidate(), and negative values are currently rejected. We
don't reject times in the past in general, so clamp this up to 0 as
needed such that the timer fires immediately rather than imposing what
looks like an arbitrary restriction.

Another possible scenario is that the system clock had to be adjusted
by ~minutes or ~hours and we have less than that in terms of uptime,
making a reasonable short-timeout suddenly invalid. Firing it is still
a valid choice in this scenario so that applications can at least
expect a consistent behavior.

Reviewed by: kib, markj
Discussed with: allanjude
Differential Revision: https://reviews.freebsd.org/D32230

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tests: kqueue: fix some issues with now() on ILP32 platforms

There were ultimately two separate problems here:
- a 32-bit long cannot represent microseconds since 1970 (noted by ian)
- time_t is 32-

tests: kqueue: fix some issues with now() on ILP32 platforms

There were ultimately two separate problems here:
- a 32-bit long cannot represent microseconds since 1970 (noted by ian)
- time_t is 32-bit on i386, so now() was wrong anyways even with the correct
return type.

For the first, just explicitly use a uint64_t for now() and all of the
callers. For the second, we need to explicitly cast tv_sec to uint64_t
before it gets multiplied in the SEC_TO_US macro. Casting this instance
rather than generally in the macro was arbitrarily chosen simply because all
other uses are converting small relative time values.

The tests now pass on i386, at least; presumably other ILP32 will be fine
now as well.

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Fix various warnings in tests/sys/kqueue and bump WARNS

Reviewed By: kevans
Differential Revision: https://reviews.freebsd.org/D24296

tests: kqueue: use a more precise timer for the NOTE_ABSTIME test

Originally noticed while attempting to run the kqueue tests under
qemu-user-static, this apparently just happens sometimes when runn

tests: kqueue: use a more precise timer for the NOTE_ABSTIME test

Originally noticed while attempting to run the kqueue tests under
qemu-user-static, this apparently just happens sometimes when running in a
jail in general -- the timer will fire off "too early," but it's really just
the result of imprecise measurements (noted by cem).

Kicking this over to NOTE_USECONDS still tests the correct thing while
allowing it to work more consistently; a basic sanity test reveals that we
often end up coming in just less than 200 microseconds after the timer
fired off.

MFC after: 3 days

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kqueue tests: fix -fno-common build

vnode_fd and kqfd are both shared among multiple CU; define them exactly
once.

In the case of vnode_fd, it was simply the declaration that needed
correction.

-f

kqueue tests: fix -fno-common build

vnode_fd and kqfd are both shared among multiple CU; define them exactly
once.

In the case of vnode_fd, it was simply the declaration that needed
correction.

-fno-common will become the default in GCC10/LLVM11.

MFC after: 3 days

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Merge ^/head r340918 through r341763.

Make whitespace more consistent in libkqueue tests.

After r337820, which "corrected" some spaces-instead-of-tab whitespace
issues in the libkqueue tests, jmg@ pointed out that these files were
origi

Make whitespace more consistent in libkqueue tests.

After r337820, which "corrected" some spaces-instead-of-tab whitespace
issues in the libkqueue tests, jmg@ pointed out that these files were
originally space-based, not tab-spaced, and so the correction should
have been to get rid of the tabs that had been introduced in previous
changes, not the spaces. This change does that. This is a whitespace
only change; no functional change is intended.

Reported by: jmg@
MFC after: 3 days
Sponsored by: Dell EMC Isilon

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MFH @ r337607, in preparation for boarding

Merge ^/head r336870 through r337285, and resolve conflicts.

Correct possible misleading error message in kqtest.

ian@ pointed out that in the test_abstime() function time(NULL) is
used twice; once in an "if" test and again in the enclosed error
message. If t

Correct possible misleading error message in kqtest.

ian@ pointed out that in the test_abstime() function time(NULL) is
used twice; once in an "if" test and again in the enclosed error
message. If the true branch was taken and the process got preempted
before the second time(NULL) call, by the time the error message was
generated enough time could have elapsed that the message could claim
that the event came "too early" but print an event time that was after
the expected timeout. Correct by making the time(NULL) call only once
and using that returned time in both the "if" test and the error
message.

Reported by: ian@
MFC after: 4 days
X-MFC-with: r336761, r336781, r336802
Sponsored by: Dell EMC

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Fix compilation error on some arches after r336761 & r336781.

Another cast for printing an intmax_t was needed in a kqueue test for
some arches.

Pointy-hat: me (twice)
MFC after: 1 week
X-MFC-with:

Fix compilation error on some arches after r336761 & r336781.

Another cast for printing an intmax_t was needed in a kqueue test for
some arches.

Pointy-hat: me (twice)
MFC after: 1 week
X-MFC-with: r336761, r336781
Sponsored by: Dell EMC

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Fix compilation error on some arches after r336761.

A cast for printing an intmax_t was needed in a kqueue test for some
arches.

MFC after: 1 week
X-MFC-with: r336761
Sponsored by: Dell EMC

Allow a EVFILT_TIMER kevent to be updated.

If a timer is updated (re-added) with a different time period
(specified in the .data field of the kevent), the new time period has
no effect; the timer wi

Allow a EVFILT_TIMER kevent to be updated.

If a timer is updated (re-added) with a different time period
(specified in the .data field of the kevent), the new time period has
no effect; the timer will not expire until the original time has
elapsed. This violates the documented behavior as the kqueue(2) man
page says (in part) "Re-adding an existing event will modify the
parameters of the original event, and not result in a duplicate
entry."

This modification, adapted from a patch submitted by cem@ to PR214987,
fixes the kqueue system to allow updating a timer entry. The
kevent timer behavior is changed to:

* When a timer is re-added, update the timer parameters to and
re-start the timer using the new parameters.
* Allow updating both active and already expired timers.
* When the timer has already expired, dequeue any undelivered events
and clear the count of expirations.

All of these changes address the original PR and also bring the
FreeBSD and macOS kevent timer behaviors into agreement.

A few other changes were made along the way:

* Update the kqueue(2) man page to reflect the new timer behavior.
* Fix man page style issues in kqueue(2) diagnosed by igor.
* Update the timer libkqueue system test to test for the updated
timer behavior.
* Fix the (test) libkqueue common.h file so that it includes
config.h which defines various HAVE_* feature defines, before the
#if tests for such variables in common.h. This enables the use of
the actual err(3) family of functions.
* Fix the usages of the err(3) functions in the tests for incorrect
type of variables. Those were formerly undiagnosed due to the
disablement of the err(3) functions (see previous bullet point).

PR: 214987
Reported by: Brian Wellington <bwelling@xbill.org>
Reviewed by: kib
MFC after: 1 week
Relnotes: yes
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D15778

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Merge ^/head r319973 through 321382.

Merge ^/head r320042 through r320397.

Add abstime kqueue(2) timers and expand struct kevent members.

This change implements NOTE_ABSTIME flag for EVFILT_TIMER, which
specifies that the data field contains absolute time to fire the
event

Add abstime kqueue(2) timers and expand struct kevent members.

This change implements NOTE_ABSTIME flag for EVFILT_TIMER, which
specifies that the data field contains absolute time to fire the
event.

To make this useful, data member of the struct kevent must be extended
to 64bit. Using the opportunity, I also added ext members. This
changes struct kevent almost to Apple struct kevent64, except I did
not changed type of ident and udata, the later would cause serious API
incompatibilities.

The type of ident was kept uintptr_t since EVFILT_AIO returns a
pointer in this field, and e.g. CHERI is sensitive to the type
(discussed with brooks, jhb).

Unlike Apple kevent64, symbol versioning allows us to claim ABI
compatibility and still name the new syscall kevent(2). Compat shims
are provided for both host native and compat32.

Requested by: bapt
Reviewed by: bapt, brooks, ngie (previous version)
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D11025

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Merge ^/head r305431 through r305622.

Move tests/sys/kqueue/... to tests/sys/kqueue/libkqueue/...

This is being done to clearly distinguish the libkqueue tests
from the (soon to be imported) NetBSD tests.

MFC after: 58 days
Sponsored b

Move tests/sys/kqueue/... to tests/sys/kqueue/libkqueue/...

This is being done to clearly distinguish the libkqueue tests
from the (soon to be imported) NetBSD tests.

MFC after: 58 days
Sponsored by: EMC / Isilon Storage Division

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