Allow the dummynet module to be loaded without ipfw, as a first step
towards making pf use it for packet scheduling.

Reviewed by:	donner
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D31903

Dummynet configuration is ideally done through dnctl now. While ipfw
still works dnctl is preferred now that dummynet can also be used with
pf.

MFC after:	2 weeks
Sponsored by:	Rubicon Communications, LLC ("Netgate")
Differential Revision:	https://reviews.freebsd.org/D31902

Discard and send ICMPv6 Packet Too Big to sender when we try to encapsulate
and forward a packet which total length exceeds the PMTU.
Logic is based on the IPv4 implementation.
Common code was moved to a separate function.

Differential revision:	https://reviews.freebsd.org/D31771
Obtained from:		Semihalf
Sponsored by:		Stormshield

If we fail to find to PMTU in hostcache, we assume it's equal
to link's MTU.

This patch prevents packets larger then link's MTU to be dropped
silently if there is no PMTU in hostcache.

Differential revision:	https://reviews.freebsd.org/D31770
Obtained from:		Semihalf
Sponsored by:		Stormshield

Add support for checking PMTU for IPv4 packets encapsulated in IPv6 tunnels.

Differential revision:	https://reviews.freebsd.org/D31769
Sponsored by:		Stormshield
Obtained from:		Semihalf

This fixes an insta-panic when attempting to use unionfs with
DEBUG_VFS_LOCKS.  Note that unionfs still has a long way to
go before it's generally stable or usable.

Reviewed by:	kib (prior version), markj
Tested by:	pho
Differential Revision: https://reviews.freebsd.org/D31917

When this flag is set, operations that update an existing kevent will
not change the udata field.  This can be used to NOTE_TRIGGER or
EV_{EN,DIS}ABLE events without overwriting the stashed pointer.

Reviewed by:	Domagoj Stolfa <domagoj.stolfa@gmail.com>
Obtained from:	CheriBSD
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D30286

CheriBSD defines additional protection flags which use underscores
such as VM_PROT_READ_CAP and VM_PROT_WRITE_CAP.

Obtained from:	CheriBSD
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D30017

PR:	258698
Submitted by:	sigsys@gmail.com
MFC after:	1 week

Keep track of the approximate time commands are 'due' and the next
deadline for a command. twice a second, wake up to see if any commands
have entered timeout. If so, quiessce and then enter a recovery mode
half the timeout further in the future to allow the ISR to
complete. Once we exit recovery mode, we go back to operations as
normal.

Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D28583

We can't copyout() while holding a lock, in case it triggers a page
fault.
Release the lock before copyout, which is safe because we've already
copied all the data into the nvlist.

PR:		258601
Reviewed by:	mjg
MFC after:	1 week
Sponsored by:	Modirum MDPay
Differential Revision:	https://reviews.freebsd.org/D32076

This patch is for the following updates to the K1 configurations:
Tx idle period for entering K1 should be 128 ns.
Minimum Tx idle period in K1 should be 256 ns.
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

PR:		258153
Reviewed by:	erj
Tested by:	iron.udjin@gmail.com
Approved by:	imp
Obtained from:	DPDK (6f934fa24dfd437c90ead96bc7598ee77a117ede)
MFC after:	1 week

From jilles: POSIX requires that a script set `OPTIND=1` before using
different sets of parameters with `getopts`, or the results will be
unspecified.

The specific problem observed here is that we would execute `man -f` or
`man -k` without cleaning up state from man_parse_args()' `getopts`
loop.  FreeBSD's /bin/sh seems to reset OPTIND to 1 after we hit the
second getopts loop, rendering the following shift harmless; other
/bin/sh implementations will leave it at what we came into the loop at
(e.g., bash as /bin/sh), shifting off any keywords that we had.

Input from:	jilles
Reviewed by:	allanjude, bapt, imp
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D32063

Depending on hardware, NUMA nodes may match last level caches, or
they may be above them (AMD Zen 2/3) or below (Intel Xeon w/ SNC).
This information is provided by ACPI instead of CPUID, and it is
provided for each CPU individually instead of mask widths, but
this code should be able to properly handle all the above cases.

This change should immediately allow idle stealing in sched_ule(4)
to prefer load from NUMA-local CPUs to remote ones when the node
does not match LLC.  Later we may think of how to better handle it
on sched_pickcpu() side.

MFC after:	1 month

The compressed ack path of rack is not following proper procedures in updating
the peers window. It should be checking the seq and ack values before updating and
instead it is blindly updating the values. This could in theory get the wrong window
in the connection for some length of time.

Reviewed by: tuexen
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D32082

In extensive testing in NF we have found two issues inside
the rack stack.

1) An incorrect offset is being generated by the fast send path when a fast send is initiated on
   the end of the socket buffer and before the fast send runs, the sb_compress macro adds data to the trailing socket.
   This fools the fast send code into thinking the sb offset changed and it miscalculates a "updated offset".
   It should only do that when the mbuf in question got smaller.. i.e. an ack was processed. This can lead to
   a panic deref'ing a NULL mbuf if that packet is ever retransmitted. At the best case it leads to invalid data being
   sent to the client which usually terminates the connection. The fix is to have the proper logic (that is in the rsm fast path)
   to make sure we only update the offset when the mbuf shrinks.
2) The other issue is more bothersome. The timestamp check in rack needs to use the msec timestamp when
   comparing the timestamp echo to now. It was using a microsecond timestamp which ends up giving error
   prone results but causes only small harm in trying to identify which send to use in RTT calculations if its a retransmit.

Reviewed by: tuexen
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D32062

PR:		248628
Reported by:	oleg
Reviewed by:	cem, oleg (both earlier)
Fixes:		ee97b233 ("Speed up vt(4) by keeping...")
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D32059

No functional change intended.

MFC after:	1 week

The error returned when a marker message can not be emitted on a port is not handled.

This cause the lacp to block all emissions until the timeout of 3 seconds is reached.

To fix this issue, I just clear the LACP_PORT_MARK flag when the packet could not be emitted.

Differential revision:	https://reviews.freebsd.org/D30467
Obtained from:		Stormshield

Calling veriexec -i locked return the state of loaded and vice-versa.

Differential revision:	https://reviews.freebsd.org/D30952
Reviewed by:		sjg,imp
Obtained from:		Stromshield

Add -o verify to sh to make it use O_VERIFY when
sourcing scripts and reading profiles.

Useful in conjunction with mac_veriexec to help protect at
least some parts of the boot sequence, e.g., /etc/rc*.

Differential revision:	https://reviews.freebsd.org/D30464
Reviewed by:		jilles, sjg
Obtained from:		Stormshield

Submitted by:	gljennjohn@gmail.com
Differential Revision:	https://reviews.freebsd.org/D31636
Sponsored by:	NVIDIA Networking

Previously, we were collecting at a base rate of:

64 bits x 32 pools x 10 Hz = 2.5 kB/s

This change drops it to closer to 64-ish bits per pool per second, to
work a little better with entropy providers in virtualized environments
without compromising the security goals of Fortuna.

Reviewed by:	#csprng (cem, delphij, markm)
Differential Revision:	https://reviews.freebsd.org/D32021

Refer to discussion in PR 230808 for a less incomplete discussion, but
the gist of this change is that we currently collect orders of magnitude
more entropy than we need.

The excess comes from bytes being read out of /dev/*random.  The default
rate at which we collect entropy without the read_rate increase is
already more than we need to recover from a compromise of an internal
state.

Reviewed by:	#csprng (cem, delphij, markm)
Differential Revision:	https://reviews.freebsd.org/D32021

Differential revision:	https://reviews.freebsd.org/D32025

Avoid using atomics as it_wait is guarded by td_lock.

Report threshold calculation is done only if at least one PMC hook
is installed

Fixes:
* avoid unnecessary branching (if frame != null ...)
  by having PMC_HOOK_INSTALLED_ANY
  condition on the top of them, which should hint
  the core not to execute speculatively anything
  which us underneath;
* access intr_hwpmc_waiting_report_threshold cacheline
  only if at least one hook is loaded;

Obtained from:		Semihalf
Sponsored by:		Stormshield
Reviewed by:		mhorne
Differential revision:	https://reviews.freebsd.org/D32055

There sig_atomic_t is shorter than void *.
As result, it cannot keep pointer.

Assigning to void * is actually safe for us in a signal handler.

Reviewed by:	asomers
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Fixes:	4f917847
Differential revision:	https://reviews.freebsd.org/D32064

Fixes:		cf0ee873 Drop cloudabi

Mostly revert ebbc3140.
We don't need to special-case anything for arm64, the check for the pointer
size is already done for us, just keep the bits about having arm and arm64
having to add padding for 32bits binaries.

MFC after:	1 week

When fsck_ffs is running in preen mode and finds a zero-length directory,
it deletes that directory. In doing this operation, it unnecessary set
its internal flag saying that fsck_ffs needed to be rerun. This patch
deletes the rerun request for this case.

Reported by:  Mark Johnson
PR:           246962
MFC after:    1 week
Sponsored by: Netflix

When decoding 32bits arm syscall, make sure we account for the padding when
decoding 64bits args. Do it too when using a 64bits truss on a 32bits binary.

MFC After:	1 week
PR:		256199

Add aarch64 to the list of architectures that can run 32bits FreeBSD binaries,
so that truss works correctly with an arm32 binary.
The same should probably be done with mips.

MFC After:	1 week

If an attempt to load history from an existing history file was
unsuccessful, do not try to save command history to that file on exit.

When there are many matches, find the longest common substring starting
from the beginning of each command and use that to replace input.

As an example: on my system, llv<tab> will be autocompleted to llvm-
and another <tab> will print all matching llvm commands.

This reverts commit 0f682948.
Also it changes the type of md_usr_fpu_save struct mdthread member
to void *, which is what uncovered this trouble.  Now the save area
is untyped, but since it is hidden behind accessors, it is not too
significant.  Since apparently there are consumers affected outside
the tree, this hack is better than one from the reverted revision.

PR:	258678
Reported by:	cy
Reviewed by:	cy, kevans, markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D32060

Submitted by:	christos@
Differential Revision:	https://reviews.freebsd.org/D31636
Sponsored by:	NVIDIA Networking

- Use correct e-mail address.
- Set FreeBSD 14.0 as introduction for the updated mixer(8) utility.

Submitted by:	christos@
Differential Revision:	https://reviews.freebsd.org/D31636
Sponsored by:	NVIDIA Networking

Differential Revision:	https://reviews.freebsd.org/D31636
Sponsored by:	NVIDIA Networking

Differential Revision:	https://reviews.freebsd.org/D31636
Sponsored by:	NVIDIA Networking