Remove gbde support from swapon(8)

Revert "swapon: Do not overwrite Linux swap header"

This reverts commit cf04a7775a4e8ff6fd28c768be9daa3d83dd382e.This is
broken on armv7, and closer scrutiny of the reviews shows I was in error
when I thought it was ready.

swapon: Do not overwrite Linux swap header

Reviewed by: imp, jhb
Pull Request: https://github.com/freebsd/freebsd-src/pull/1084

Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by: Netflix

sbin: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line .c pattern

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

Mark usage function as __dead2 in programs where it does not return

In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.

Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735

swapon(8): adapt to the new swapoff(2) interface

also fix test sys/audit/administrative.c.

Reviewed by: brooks
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33343

swapoff(8): add -f flag

to force swapout by ignoring the heuristic that calculates amount of
allocated memory against total of RAM plus remaining swap.

Reviewed by: markj
Discussed with: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D33165

- Fix logic error in swapoff case: follow same handling of p and
linelen in the swapon case.
- Use strlcpy instead of strncpy.

MFC after: 1 week

Fix a logic bug in error handling code. It is an error if p == NULL.
The linelen tests are only meaningful when p != NULL.

Reported by: Coverity
Coverity CID: 1368655
MFC after: 1 month

swap_pager.c reserves 2 blocks for a bsd label. Change that 2 to the
expression howmany(BBSIZE, PAGE_SIZE), where BBSIZE is the size of the
boot block area. That can be less than 2 if PAGE_SIZE is big.

swapon(8) has an option to trim (delete) all the blocks of a device at
startup. However, if the first of those blocks is a bsd label, then
trimming those blocks is destructive. Change swapon to leave the
first BBSIZE bytes untrimmed.

Update manual pages to reflect changes in how swapon and how it may be
used, espeically in association with savecore.

Reviewed by: alc
Approved by: markj (mentor)
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D21191

Rewrite the comments that explain swapon_trim() to make them more
comprehensible.

Suggested by: rpokala
Approved by: markj (mentor)
Differential Revision: https://reviews.freebsd.org/D21034

In trimming on startup, invoke swapon before closing the fd used for
trimming so that a geli device isn't detached before swapon is
invoked.

Submitted by: sigsys_gmail.com
Discussed with: alc
Approved by: markj (mentor)
Differential Revision: https://reviews.freebsd.org/D21006

You can't use block special nodes for swap, so don't let that happen.

Fix a style violation with regard to header file arrangement.

Improved by: alc
Approved by: markj, kib (mentor)
Differential Revision: https://reviews.freebsd.org/D20723

Modify swapon(8) to invoke BIO_DELETE to trim swap devices, either if
'-E' appears on the swapon command line, or if "trimonce" appears as
an fstab option.

Discussed at: BSDCAN
Tested by: markj
Reviewed by: markj
Approved by: markj (mentor)
Differential Revision:https://reviews.freebsd.org/D20599

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

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.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Fix late and noauto with geli swap

With the following in /etc/fstab:

/dev/gpt/swap.eli none swap sw,late 0 0

swap will not be enabled, with `swapon -aL' complaining:

swapon: Invalid option: late

This happens because swap_on_geli_args() which parses geli arguments
out of all mount options does not expect late or noauto among them.
Fix this by explicitly allowing these arguments.

Reviewed by: jilles
Approved by: jilles
MFC after: 2 weeks
Differential Revision: D9835

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

swapoff: Remove only late devices with -aL.

Currently, '/etc/rc.d/swaplate stop' removes all swap devices. This can be
very slow and may not even be possible if there is a lot of swap space in
use. However, removing swap devices is only needed for late swap devices
that may depend on daemons that subsequent shutdown steps stop. Normal swap
devices such as hard disk partitions will remain available throughout the
shutdown process and need not be removed.

In swapoff, interpret -aL to remove late swap devices only, and use this in
etc/rc.d/swaplate. The meaning of -aL in swapon remains unchanged (add all
swap devices, both normal and late).

PR: 187081
Reviewed by: wblock (man page only), ngie
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D8126

Stop using the non-standard basename_r() function.

This change makes the code use the POSIX basename() function. It has the
advantage that (if implemented correctly), it also imposes no restrict
on the pathname length.

Notice that I haven't added any error handling to the strdup() call. It
looks like none of the other calls to strdup() and malloc() performed by
this utility do it either.

Reviewed by: hrs
Differential Revision: https://reviews.freebsd.org/D6626

sbin: minor spelling fixes.

No functional change.

Delete argsize to fix a -Wunused-but-set-variable warning with gcc 4.9

The variable isn't actually checked -- just the end result which gets
returned from the function

Differential Revision: https://reviews.freebsd.org/D5156
Reviewed by: araujo, delphij
MFC after: 1 month
Sponsored by: EMC / Isilon Storage Division

Call va_end on ap when vsnprintf fails in run_cmd(..) to clean up
the variable state

MFC after: 1 week
Reported by: cppcheck
Sponsored by: EMC / Isilon Storage Division

Allow to disable BIO_DELETE passthru in fstab for swap-on-geli devices by
passing 'notrim' option.

PR: 198863
Submitted by: Matthew D. Fuller fullermd at over-yonder dot net

Do not add late flag when file= is specified because it has a bad
side-effect. The specified file should exist before the fstab line.

Reported by: wblock (long time ago)
MFC after: 1 day

swapon: Fix buffer overflow when configuring encrypted swap on GBDE.

PR: bin/184950
Tested by: Radim Kolar
MFC after: 3 days

Style clean-ups.

Reviewed by: md5

Enable "late" option when a file= option is specified in /etc/fstab.
The file= option requires rw mount where the backing store exists but
it does not work because rc.d/swap runs before rc.d/fsck.
Reported by: wblock

Make two buffer variables static for now. It is not safe to
reference stack memory after return.

MFC after: 2 weeks

Plug a memory leak.

Correct a typo in comment.

- Modify swapon(8) so that it uses most of geli(8) defaults for swap,
which is presently: AES-XTS, no authentication. Create provider
with pagesize as sectorsize by default.
- Rewrite parsing code for geli(8)-backed swap options, now options
are required to be exact match, and unrecognized options will trigger
a warning.
- Don't initialize GELI device if it's already initialized. This
restores previous behavior.
- Don't duplicate file descriptor when working with geli(8) and
gbde(8) as there is no need to communicate with the utility other
than exit status.
- When calling swap_on_off_* routines, which_prog can only be SWAP_ON
or SWAP_OFF. Eliminate unneeded case branches by replacing switch
with if's.
- Plug a few memory leaks.

Reviewed by: hrs (but bugs are mine)
MFC after: 1 week
X-MFC-with: r252310, r252332, r252345

Fix build with gcc.

Fix build.

Spotted by: gjb

- Add vnode-backed swap space specification support. This is enabled when
device names "md" or "md[0-9]*" and a "file" option are specified in
/etc/fstab like this:

md none swap sw,file=/swap.bin 0 0

- Add GBDE/GELI encrypted swap space specification support, which
rc.d/encswap supported. The /etc/fstab lines are like the following:

/dev/ada1p1.bde none swap sw 0 0
/dev/ada1p2.eli none swap sw 0 0

.eli devices accepts aalgo, ealgo, keylen, and sectorsize as options.

swapctl(8) can understand an encrypted device in the command line
like this:

# swapctl -a /dev/ada2p1.bde

- "-L" flag is added to support "late" option to defer swapon until
rc.d/mountlate runs.

- rc.d script change:

rc.d/encswap -> removed
rc.d/addswap -> just display a warning message if $swapfile is defined
rc.d/swap1 -> renamed to rc.d/swap
rc.d/swaplate -> newly added to support "late" option

These changes alleviate a race condition between device creation/removal
and swapon/swapoff.

MFC after: 1 week
Reviewed by: wblock (manual page)

Add missing static keywords for global variables to tools in sbin/.

These tools declare global variables without using the static keyword,
even though their use is limited to a single C-file, or without placing
an extern declaration of them in the proper header file.

Build swapon with WARNS=6.

Don't use a variable called stat, because it collides with stat(2).

Add new option -F to specify alternative location of the /etc/fstab
file.

MFC after: 1 month

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

- Import the HEAD csup code which is the basis for the cvsmode work.

Add a -q flag to swapon(8) to suppress informational messages. Use it in
rc.d.
Note: errors are not affected by this flag.

- Change the meaning of -h flag from giving the output in megabytes to
giving the output in a human-readable form. This behaviour is consistent
with most of system tools.
- Add -m and -g options to give output in megabytes and gigabytes
respectively.

Sync program's usage() with manpage's SYNOPSIS.

Don't include sys/user.h merely for its side-effect of recursively
including other headers.

Remove advertising clause from University of California Regent's license,
per letter dated July 22, 1999.

Approved by: core, imp

Make NULL a (void*)0 whereever possible, and fix the warnings(-Werror)
that this provokes. "Wherever possible" means "In the kernel OR NOT
C++" (implying C).

There are places where (void *) pointers are not valid, such as for
function pointers, but in the special case of (void *)0, agreement
settles on it being OK.

Most of the fixes were NULL where an integer zero was needed; many
of the fixes were NULL where ascii <nul> ('\0') was needed, and a
few were just "other".

Tested on: i386 sparc64

Use __FBSDID() to quiet GCC 3.3 warnings.

- Add a clearer error message for the case where swapon hits the
NSWAPDEV limit.
- Don't warn about devices that are not in use in 'swapoff -a'.
- Re-add behavior mistakenly removed in revision 1.44:
If using 'swapon -a', do not warn if the device is already in use.

PR: 46633
Submitted by: Andy Farkas <andyf@speednet.com.au> (in part)
Reviewed by: mike (mentor)

Remove hack from rev 1.15; getbsize(3)'s original interface has been
restored.

Make the first argument to getbsize(3) a `size_t *'. This is a hack
since getbsize(3) should have `int *' as its first parameter.

Add 'swapctl' - as a hardlink to swapon/swapoff, and augment swapon with
swapctl functionality. The idea is to create a swapctl command that is
fairly close to the OpenBSD and NetBSD version. FreeBSD does not implement
swap priority (and it would be a mistake if we did) so we didn't bother with
that part of it.

Submitted by: Eirik Nygaard <eirikn@bluezone.no>
Augmented by: dillon (extensively)
Reviewed by: David Schultz <dschultz@uclink.Berkeley.EDU>

This is David Schultz's swapoff code which I am finally able to commit.
This should be considered highly experimental for the moment.

Submitted by: David Schultz <dschultz@uclink.Berkeley.EDU>
MFC after: 3 weeks

o remove __P
o remove main prototype

Remove 'register' keyword.
It does not help modern compilers, and some may take some hit from it.
(I also found several functions that listed *every* of its 10 local vars with
"register" -- just how many free registers do people think machines have?)

Include missing header files which define functions for which gcc has
builtins (e.g., exit, strcmp).

Add include of errno.h where needed, remove extern int errno where not.

These commits were inspired by a similar commit to netbsd.

$Id$ -> $FreeBSD$

.Nm swapon -> .Nm.
Sort #includes. Add rcsid.

Use warn(3).

compare return value from getopt against -1 rather than EOF, per the final
posix standard on the topic.

Make the noauto flag usable for swap devices too. Closes PR#1542
Submitted-By: David Leonard <d@scry.dstc.edu.au>

Take out special error message for EINVAL...we really do want it to be
"invalid argument".

Fix -Wall warnings.

Yes I have better things to do, but just now I'm waiting...

BSD 4.4 Lite sbin Sources

Note: XNSrouted and routed NOT imported here, they shall be imported with
usr.sbin.