Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

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

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

IOCPARM_MAX defines maximum size of a structure that can be passed
directly to ioctl(2). Because of how ioctl command is build using _IO*()
macros we have only 13 bits to encode structure size. So the structure
can be up to 8kB-1.

Currently we define IOCPARM_MAX as PAGE_SIZE.

This is IMHO wrong for three main reasons:

1. It is confusing on archs with page size larger than 8kB (not really
sure if we support such archs (sparc64?)), as even if PAGE_SIZE is
bigger than 8kB, we won't be able to encode anything larger in ioctl
command.

2. It is a waste. Why the structure can be only 4kB on most archs if we
have 13 bits dedicated for that, not 12?

3. It shouldn't depend on architecture and page size. My ioctl command
can work on one arch, but can't on the other?

Increase IOCPARM_MAX to 8kB and make it independed of PAGE_SIZE and
architecture it is compiled for. This allows to use all the bits on all the
archs for size. Note that this doesn't mean we will copy more on every ioctl(2)
call. No. We still copyin(9)/copyout(9) only exact number of bytes encoded in
ioctl command.

Practical use for this change is ZFS. zfs_cmd_t structure used for ZFS
ioctls is larger than 4kB.

Silence on: arch@
MFC after: 1 month

Protect _IOC's 'len' and 'inout' parameters so that _IOC can be used in
more flexible ways.

Fix our ioctl(2) implementation when the argument is "int". New
ioctls passing integer arguments should use the _IOWINT() macro.
This fixes a lot of ioctl's not working on sparc64, most notable
being keyboard/syscons ioctls.

Full ABI compatibility is provided, with the bonus of fixing the
handling of old ioctls on sparc64.

Reviewed by: bde (with contributions)
Tested by: emax, marius
MFC after: 1 week

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

Approved by: core

I've fixed the X11 port, so I can remove the (ioctl) hack.

This hack turns out to be a bad idea. Many auto configuration scripts
will #include a bunch of system headers, run it through cpp and then
grep/sed to see if there was really a prototype. The regular
expressions that are used to test this didn't accept all possible
legal ANSI-C prototypes. In particular, they didn't accept the ()
around ioctl. Several different programs do this, so eliminating the
parans will keep FreeBSD maximally compatible with other systems.

Appologies to: obrien (he was right in the end)

This potentally breaks some ports (and fixes vim and others that
haven't been fixed to deal with the parens).

Back out rev 1.11. People want a FUBARed prototype that breaks many
things.

Back out revision 1.11 which wrapped the ioctl prototype w/()'s.
While it may have allowed the XFree86 4 port to build; it killed TONS
of other ports. The XFree86 4 can be patched to not use its macro a lot
easier than figuring how to deal with 1000 other now-broken ports.

Use int (ioctl)(...) rather than int ioctl(...) so that ioctl can be defined
as a macro w/o messing things up. This is really an abuse and we will back
this out as soon as the abusers have been fixed. Add a comment to this
effect.

With this change, the XFree86-4 port now builds.

Remove __P

Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.

$Id$ -> $FreeBSD$

This commit fixes various 64bit portability problems required for
FreeBSD/alpha. The most significant item is to change the command
argument to ioctl functions from int to u_long. This change brings us
inline with various other BSD versions. Driver writers may like to
use (__FreeBSD_version == 300003) to detect this change.

The prototype FreeBSD/alpha machdep will follow in a couple of days
time.

Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not
ready for it yet.

Make the long-awaited change from $Id$ to $FreeBSD$

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.

Moved the prototype for ioctl() from <sys/ioctl.h> to <sys/ioccom.h>
so that applications don't have to include <sys/ioctl.h> just to get
a prototype for ioctl().

removed:
CLBYTES PD_SHIFT PGSHIFT NBPG PGOFSET CLSIZELOG2 CLSIZE pdei()
ptei() kvtopte() ptetov() ispt() ptetoav() &c &c
new:
NPDEPG

Major macro cleanup.

Added $Id$

This commit was generated by cvs2svn to compensate for changes in r1541,
which included commits to RCS files with non-trunk default branches.

BSD 4.4 Lite Kernel Sources