MFC r335921:

Allow jail names (not just IDs) to be specified for: cpuset(1), ipfw(8),
sockstat(1), ugidfw(8)
These are the last of the jail-aware userland utilities that didn't work
with names.

PR: 229266
Differential Revision: D16047

MFC r326276:

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified 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.

No functional change intended.

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Create a cpuset mask for each NUMA domain that is available in the
kernel via the global cpuset_domain[] array. To export these to userland,
add a CPU_WHICH_DOMAIN level that can be used to fetch the mask for a
specific domain. Add a -d flag to cpuset(1) that can be used to fetch
the mask for a given domain.

Differential Revision: https://reviews.freebsd.org/D1232
Submitted by: jeff (kernel bits)
Reviewed by: adrian, jeff

Add missing static keywords to cpuset(1)

Add two more features to cpuset(1):
- Add a new -C flag to create a new cpuset and move an existing pid into
that set.
- Allow 'all' to be specified for a cpu list (e.g. cpuset -s 1 -l all)
which maps to the list of all CPUs in the system.

MFC after: 2 weeks

Revert most part of 200420 as requested, as more review and polish is
needed.

Remove unneeded header includes from usr.bin/ except contributed code.

Tested with: make universe

MFp4:
Bring in updated jail support from bz_jail branch.

This enhances the current jail implementation to permit multiple
addresses per jail. In addtion to IPv4, IPv6 is supported as well.
Due to updated checks it is even possible to have jails without
an IP address at all, which basically gives one a chroot with
restricted process view, no networking,..

SCTP support was updated and supports IPv6 in jails as well.

Cpuset support permits jails to be bound to specific processor
sets after creation.

Jails can have an unrestricted (no duplicate protection, etc.) name
in addition to the hostname. The jail name cannot be changed from
within a jail and is considered to be used for management purposes
or as audit-token in the future.

DDB 'show jails' command was added to aid debugging.

Proper compat support permits 32bit jail binaries to be used on 64bit
systems to manage jails. Also backward compatibility was preserved where
possible: for jail v1 syscalls, as well as with user space management
utilities.

Both jail as well as prison version were updated for the new features.
A gap was intentionally left as the intermediate versions had been
used by various patches floating around the last years.

Bump __FreeBSD_version for the afore mentioned and in kernel changes.

Special thanks to:
- Pawel Jakub Dawidek (pjd) for his multi-IPv4 patches
and Olivier Houchard (cognet) for initial single-IPv6 patches.
- Jeff Roberson (jeff) and Randall Stewart (rrs) for their
help, ideas and review on cpuset and SCTP support.
- Robert Watson (rwatson) for lots and lots of help, discussions,
suggestions and review of most of the patch at various stages.
- John Baldwin (jhb) for his help.
- Simon L. Nielsen (simon) as early adopter testing changes
on cluster machines as well as all the testers and people
who provided feedback the last months on freebsd-jail and
other channels.
- My employer, CK Software GmbH, for the support so I could work on this.

Reviewed by: (see above)
MFC after: 3 months (this is just so that I get the mail)
X-MFC Before: 7.2-RELEASE if possible

- Add support for interrupt bindig to cpuset(1). Interrupts are bound
by specifying the interrupt with -x <irq>. The irq number matches
those displayed by vmstat -i.

Sponsored by: Nokia

- When running a new command cause cpuset to operate on the per-thread mask
by default rather than the setmask. This is consistent with the linux
tool and more consistent with the notion that the default level is
the process level. The cpuset mask can still be modified by specifying
the -c option. You can not set the per-thread and cpuset mask in
a single command.
- Update the man page to reflect this change.

Contributed by: gallatin

- Remove the -i argument when running a command to simplify things a
little bit and to prevent users from specifying a private mask that may
later restrict other group changes.
- Add a man page which brueffer generously contributed to.

Sponsored by: Nokia

- Verify that when a user supplies a mask that is bigger than the kernel
mask none of the upper bits are set.
- Be more careful about enforcing the boundaries of masks and child sets.
- Introduce a few more CPU_* macros for implementing these tests.
- Change the cpusetsize argument to be bytes rather than bits to match
other apis.

Sponsored by: Nokia

Add a simple utility for manipulating cpusets. Man page will be available
soon.
- Lists of cpus may be specified with -l with ranges specified as low-high and
commas between individual cpus and ranges. ie -l 0-2,4,6-8.
- cpuset can modified -p pids, -t tids, or -s cpusetids.
- cpuset can -g get the current mask for any of the above.

Sponsored by: Nokia