bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPLICIT_FALLTHRU is CC_WNO_IMPLICIT_FALLTHROUGH

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

Add basic ZFS support to fstat(1).
XXX: Use a local zfs_znode.h for a znode_t definition because the ZFS
kernel code makes it too hard to include headers from userland.

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow (GCC 8)
GCC_NO_CAST_FUNCTION_TYPE -Wno-cast-function-type (GCC 8)

use these to turn off warnings for most GCC-8 complaints. many
of these are false positives, most of the real bugs are already
commited, or are yet to come.


we plan to introduce versions of (some?) of these that use the
"-Wno-error=" form, which still displays the warnings but does
not make it an error, and all of the above will be re-considered
as either being "fix me" (warning still displayed) or "warning
is wrong."

branches: 1.25.14;
for 64 bit mips platforms where we built userland largely as n32 by
default, build a handful of tools as n64 so they work properly.

unfortunately, they're also static as dynamic n64 has a problem.

of these tools pstat is probably the lowest hanging fruit to convert
to sysctl. systat would be close were it not for the netstat screen,
which includes netstat itself.

the rest are difficult to perhaps foolish.


the upside is that netstat, pmap and fstat all work properly now.

branches: 1.24.2;
put _KMEMUSER in the Makefile

add libutil.

Enable WARNS=4 by default for usr.bin, except for:
awk bdes checknr compile_et error gss hxtool kgetcred kinit
klist ldd less lex locale login m4 man menuc mk_cmds
mklocale msgc openssl rpcgen rpcinfo sdiff spell ssh
string2key telnet tn3270 verify_krb5_conf xlint

branches: 1.21.6;
a better attempt on printing dtype_misc

branches: 1.20.12;
Add new Makefile knob, USE_FORT, which extends USE_SSP by turning on the
FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.

This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.

This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.

Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.

PR/32788: KAMADA Ken'ichi: add support for tmpfs

WARNS=3, knf, ansi prototypes

Only compile in IPv6 support if ${USE_INET6} != "no"

MKINET6 is for providing IPv6 infrastructure.
USE_INET6 is for compiling IPv6 support into the programs (needs MKINET6).

Add ptyfs.

IPv6 support.
NetBSD PR: 9199 (with minor changes)

the PMAP_NEW option is gone as the new interface is no longer optional.

add support for ntfs

completely remove Mach VM support. all that is left is the all the
header files as UVM still uses (most of) these.

as suggested by chuck cranor, pull in some openbsd mods:
* display ip address details of tcp/udp connections
* display isofs details
* use %p instead of %lx in error messages

other mods by me:
* don't put \n at the end of err()/warn() format
* man page cleanups (use .Dq and .Pq as appropriate)

fstat(1) also depends on UVM and PMAP_NEW.

RCS ID police

do not need -I/sys

Merge local changes.

Aid cross-compiling, like iostat

clean up import

needs -lkvm, not -lutil

Add RCS indentifiers.

Don't need -I/sys. (Why was it here?)

branches: 1.1.1;
Initial revision

Use \(em.

Add -O to print offsets; align columns properly.

branches: 1.34.6;
Remove workaround for ancient HTML generation code.

Sort SYNOPSIS and option descriptions. Bump date for previous.

New -A option. Add an output column with the address of the
kernel object (vnode or file) that can be matched with prstat(8) output.

- In the example for `-f', reference a directory that is actually
available in a default installation (/usr/src isn't);
- put together two lines which belong to the same sentence;
- remove a spurious space character;
- remove unneeded consecutive argument for `.Nm' macro.

From Bug Hunting.

branches: 1.30.2; 1.30.8;
add an xref to fstat(2)

Remove trailing whitespace and use Sx for section crossreference.

move UNIX socket mention in the BUGS section.

Remove duplicate RCS Id and split file system.

Mention that fstat -f will not list open unix sockets on that filesystem.

Sockets: Do not mention printing flags, because they are not printed.
From Stephan A. Rickauer via jmc@openbsd.

Bump date.

Xref sockstat(1)

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

- file ... instead of filename ...
- "An asterisk (``*'')" instead of "A (``*'')" to be more consistient with
rest of this manpage.
- Fix typo; ``w'' instead of ``''.
- There is no section named Sockets. There is only SOCKETS.

New sentence, new line.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Edit -mdoc usage.

* There is no -indent option to .Bd or .Bl, although you would
never know that from its frequent use in this tree. There is a
"-offset indent" combination that makes sense, and you can certainly
say "-width indent".

* Also, you can't markup the -width option argument, tho you CAN
use a callable macro. So "-width Ar filename" doesn't make sense,
but either "-width Ar" or "-width filename" does, as might something
like "-width xxfilename" for a little extra space.

* There are a lot of needlessly complex hanging tag macros in man4 used
to create simple item lists. Those should be simplified one of these
days before someone copies and edits yet another man4 page.

Punctuation nit, sort sections.

Change xref for vmstat(8) to vmstat(1).
Whitespace, punctuation and spelling fixes while I'm here.

Typos (from OpenBSD)

Improve summary line so jhawk can find this command using apropos

branches: 1.14.6;
More and more .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

Fix Xref; from Geoff C. Wing in PR bin/7166.

as suggested by chuck cranor, pull in some openbsd mods:
* display ip address details of tcp/udp connections
* display isofs details
* use %p instead of %lx in error messages

other mods by me:
* don't put \n at the end of err()/warn() format
* man page cleanups (use .Dq and .Pq as appropriate)

Change occurrences of "UNIX" to .Ux or .At as appropriate.

WARNSify, fix .Nm usage, deprecate register

RCS ID police

vmstat is in section 8; PR #1532

vmunix -> netbsd (PR #375)

branches: 1.6.2;
Merge local changes.

clean up import

vmunix -> netbsd

Fix spelling errors.

Add RCS indentifiers.

branches: 1.1.1;
Initial revision

Back out the following revisions on behalf of core:

sys/sys/lwp.h: revision 1.228
sys/sys/pipe.h: revision 1.40
sys/kern/uipc_socket.c: revision 1.306
sys/kern/kern_sleepq.c: revision 1.84
sys/rump/librump/rumpkern/locks_up.c: revision 1.13
sys/kern/sys_pipe.c: revision 1.165
usr.bin/fstat/fstat.c: revision 1.119
sys/rump/librump/rumpkern/locks.c: revision 1.87
sys/ddb/db_xxx.c: revision 1.78
sys/ddb/db_command.c: revision 1.187
sys/sys/condvar.h: revision 1.18
sys/ddb/db_interface.h: revision 1.42
sys/sys/socketvar.h: revision 1.166
sys/kern/uipc_syscalls.c: revision 1.209
sys/kern/kern_condvar.c: revision 1.60

Add cv_fdrestart() [...]
Use cv_fdrestart() to implement fo_restart.
Simplify/streamline pipes a little bit [...]

This changes have caused regressions and need to be debugged.
The cv_fdrestart() addition needs more discussion.

Simplify/streamline pipes a little bit:

- Allocate only one struct pipe not two (no need to be bidirectional here).
- Then use f_flag (FREAD/FWRITE) to figure out what to do in the fileops.
- Never wake the other side or acquire long-term (I/O) lock unless needed.
- Whenever possible, defer wakeups until after locks have been released.
- Do some things locklessly in pipe_ioctl() and pipe_poll().

Some notable results:

- -30% latency on a 486DX2/66 doing 1 byte ping-pong within a single process.
- 2.5x less lock contention during "make cleandir" of src on a 48 CPU machine.
- 1.5x bandwith with 1kB messages on the same 48 CPU machine (8kB: same b/w).

Add memfd_create(2) from GSoC 2023 by Theodore Preduta

Adjust userland commands for struct inpcb separation

Only kvm users are affected.

Adjust userland commands for struct inpcb integration

Only kvm users are affected.

Add basic ZFS support to fstat(1).
XXX: Use a local zfs_znode.h for a znode_t definition because the ZFS
kernel code makes it too hard to include headers from userland.

Provide a helpful error message if we don't have privs to read kernel
addresses.

Add -O to print offsets; align columns properly.

- add or adjust /* FALLTHROUGH */ where appropriate
- add __unreachable() after functions that can return but won't in
this case, and thus can't be marked __dead easily

branches: 1.111.14;
Print the interface for bpf.

branches: 1.110.2;
print the tag symbolically if we don't support it.

Resolve names of datagram services correctly.

fix protocol printing order.

make fstat -f search for unix sockets.

Fix output for -A -f ...

sync usage with man page

New -A option. Add an output column with the address of the
kernel object (vnode or file) that can be matched with prstat(8) output.

use correct function and symbolic constants

use new scopeid functions

avoid pointer gymnastics

- add more debugging.
- in misctrans() we need the file index not the file type.

print major device numbers symbolically from kinfo_drivers

more info for unix sockets. XXX: chroot handling

fix non-numeric address and port printing.

branches: 1.96.2;
byte swap the inet6 ports.

branches: 1.95.2; 1.95.4;
fix rdev reporting for UFS2 and ext2fs.

apply some (uintptr_t) so that printing printers works on i386 (likely
all 32 bit.)

- factor out common code in the inet and inet6 printing.
- add appletalk (ddp) support.

- remove bogus casts
- print recycled vnode flags

- minor KNF
- for system processes (0, 1) where fd_lastfile == -1, fail early.
- instead of printing the pcb connection address, print the pathname if
possible for unix domain sockets.

Add DTYPE_SEM.

More changes to improve kern_descrip.c.

- Avoid atomics in more places.
- Remove the per-descriptor mutex, and just use filedesc_t::fd_lock.
It was only being used to synchronize close, and in any case we needed
to take fd_lock to free the descriptor slot.
- Optimize certain paths for the <NDFDFILE case.
- Sprinkle more comments and assertions.
- Cache more stuff in filedesc_t.
- Fix numerous minor bugs spotted along the way.
- Restructure how the open files array is maintained, for clarity and so
that we can eliminate the membar_consumer() call in fd_getfile(). This is
mostly syntactic sugar; the main functional change is that fd_nfiles now
lives alongside the open file array.

Some measurements with libmicro:

- simple file syscalls are like close() are between 1 to 10% faster.
- some nice improvements, e.g. poll(1000) which is ~50% faster.

Fix sign-compare issues.

branches: 1.87.2;
64 bit dev_t

Cast f_type to signed integer before comparison with negative values.

Add back rev 1.83. (hi christos!)

a better attempt on printing dtype_misc

Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.82.4;
handle NULL better.

elementary handling for different types of DTYPE_FOO.
XXX: DTYPE_CRYPTO is unused.
XXX: should we change fd_clone() to pass a DTYPE_FOO?

catch up with struct filedesc changes.

Please repeat after me: I shall not define _KERNEL before including
<sys/types.h> in user-land programs. Doing so causes build problems
for lots of our ports due to differences in how <sys/bswap.h> ends up
defining the swap functions/macros.

Catch up with recent file descriptor changes.

convert __attribute__s to applicable cdefs.h macros

Bug fix: filed.fd_ofiles is always a pointer to the open files
table, so always read the table from kernel virtual memory at that
address. Do not ever try to read the table from filed0.fd_dfiles,
because it just isn't necessary, and sometimes we read a stale
table from there.

branches: 1.75.12;
tweak for user.h cleanup.
while i'm here, remove unnecessary #include.

maxfiles -> fstat_maxfiles. (this _KERNEL definition code needs to not
clash with kernel headers....)

PR/32788: KAMADA Ken'ichi: add support for tmpfs

WARNS=3, knf, ansi prototypes

Cast fst.fileid to unsigned long and print it as such. Inode numbers
are never negative.

Add ptyfs.

NI_WITHSCOPEID was not picked up by IETF standardization process.

Add (unsigned char) cast to ctype functions

Replace the statfs() family of system calls with statvfs().
Retain binary compatibility.

fix the way the ext2fs-specific size and mode variables are fetched:
they are indirectly gotten from kernel memory and as such should be read
with KVM_READ.
This fixes fstat core dumps when some process holds a reference in a Linux
ext2fs filesystem.
Thanks to Aleksy Schubert (alx.at.mimuw.dot.edu.dot.pl) for debugging this
with me.

branches: 1.65.2;
Don't compare integers and NULL.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

use bounded string op

Add support for UFS2. UFS2 is an enhanced FFS, adding support for
64 bit block pointers, extended attribute storage, and a few
other things.

This commit does not yet include the code to manipulate the extended
storage (for e.g. ACLs), this will be done later.

Originally written by Kirk McKusick and Network Associates Laboratories for
FreeBSD.

undo mallocvar.h changes!

Include "sys/mallocvar.h" with "_KERNEL" defined in time to avoid
build failure because MALLOC_DECLARE() is not defined.

Make it compile again on LP64 archs.
XXX - we *realy* need some format string macros for size_t/off_t!

Use kvm_getprocs2 so independant of kernel version
(change aggreed by christos)

add VT_LFS case.

merge rev. 1.50.2.1 (made by lukem):
rudimentary support for for displaying DTYPE_KQUEUE fds

Add an extra column for inode numbers, and pull back the mode field to
just 5 columns if in "numeric" mode. Other fields should dynamically
resize, but not today...

for (new)pipes, print 'n' if it's in nonblocking mode, and 'a' if it's
set to async

remove #include <ufs/ufs/quota.h> where it was just to appease
<ufs/ufs/inode.h>, since the latter now includes the former. leave the former
in source that obviously uses specific bits of it (for completeness.)

remove accidentaly left debug printf

change the pipe descriptor output to include 'r' or 'w' to explicitly
indicate it's open for reading or writing, similarily to "regular" descriptors

the descriptor flags may also contain other stuff besides FWRITE|FREAD,
so do '& FWRITE' instead of '== FWRITE' in the check in pipe-related code

branches: 1.50.2;
fix comment

`accessible' only has one `a'.

convert if ... else if ... tree to a switch

Add support for DTYPE_PIPE pipes (a.k.a NEW_PIPE)

don't #define _LKM to work around header lossage; it is no longer necessary.

use %ll_ instead of the less standard %q_

Redo previous a bit different way so that mount point of top layer is shown
instead of lowest one and ``fstat file-on-upperlayer'' works.

Print lower vnode if vnode is on a layered filesystem.

branches: 1.42.4;
Bring into line with recent ktrace changes

add support for msdosfs

move the mapping of vnode type to file type to separate function getftype()
and use it where appropriate

fix typo

IPv6 support.
NetBSD PR: 9199 (with minor changes)

add support for ntfs

Define "_LKM" before including kernel includes with "_KERNEL" defined
so that "opt_ffs.h" gets skipped.

Adjust for cwdinfo changes.

as suggested by chuck cranor, pull in some openbsd mods:
* display ip address details of tcp/udp connections
* display isofs details
* use %p instead of %lx in error messages

other mods by me:
* don't put \n at the end of err()/warn() format
* man page cleanups (use .Dq and .Pq as appropriate)

const propagation.

const propagation.

use AF_LOCAL instead of AF_UNIX

Fix LP64 problems from (5!) July deltas.

one more thing...

convert the remainder of the fprintf() to {err,warn}{,x}()

fix build error - forgot to #include <err.h> for errx()

- change setgid kmem programs (that lend themselves to this) so setegid(getgid())
and the top, and then set the effective gid back to kmem around the call to
kvm_openfiles(). this reduces the time group kmem is available.
- for those above that also allow this, setgid(getgid()) after the call to
kvm_openfiles() to fully revoke priviledges.
- some KNF
- use err(3) over fprintf(3) in some places

check return value of kvm_read() more safe

Update for changes to how nfsnode attributes are stored.

WARNSify, fix .Nm usage, deprecate register

getopt returns -1 not EOF

merge lite-2.

Make this compile again, and add support for ext2fs.
Also 2 ufs->ffs conversions in pstat.8.

Add a double quote to make emacs's color mode happy...

remove dangerous sprintf and strcpy calls.

RCS ID police

Change -N and -M option string to specify the options have an argument.
Fixes PR#2374.

Fix NFS include files; sync with Lite2

KERNEL -> _KERNEL

Check for bogus file descriptor tables.

type sanity

Merge local changes.

include file fix

get it to work with old private data allocation

clean up import

update for changed flags

Fixed multiple off-by-one bugs which caused the open file printing to
not print the last open file. patch from David Greenman
<davidg@implode.rain.com>.

Add RCS identifiers.

don't explicitly include select.h, but keep header cleanup

fix for new select stuff

NFS not properly defined. glass gets another point.

branches: 1.1.1;
Initial revision

Add basic ZFS support to fstat(1).
XXX: Use a local zfs_znode.h for a znode_t definition because the ZFS
kernel code makes it too hard to include headers from userland.

Add -O to print offsets; align columns properly.

branches: 1.9.46;
Fix sign-compare issues.

branches: 1.8.6;
a better attempt on printing dtype_misc

branches: 1.7.22;
PR/32788: KAMADA Ken'ichi: add support for tmpfs

WARNS=3, knf, ansi prototypes

Add ptyfs.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

move the mapping of vnode type to file type to separate function getftype()
and use it where appropriate

add support for ntfs

as suggested by chuck cranor, pull in some openbsd mods:
* display ip address details of tcp/udp connections
* display isofs details
* use %p instead of %lx in error messages

other mods by me:
* don't put \n at the end of err()/warn() format
* man page cleanups (use .Dq and .Pq as appropriate)

Fix sign-compare issues.

branches: 1.6.30;
tweak for user.h cleanup.
while i'm here, remove unnecessary #include.

WARNS=3, knf, ansi prototypes

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

undo mallocvar.h changes!

Include "sys/mallocvar.h" with "_KERNEL" defined in time to avoid
build failure because MALLOC_DECLARE() is not defined.

as suggested by chuck cranor, pull in some openbsd mods:
* display ip address details of tcp/udp connections
* display isofs details
* use %p instead of %lx in error messages

other mods by me:
* don't put \n at the end of err()/warn() format
* man page cleanups (use .Dq and .Pq as appropriate)

sys: Rename sys/miscfd.h -> sys/memfd.h.

Let's not create new dumping grounds for miscellaneous stuff; one
header file for one purpose.

move the memfd struct to a separate file. Requested by riastradh@

Add memfd_create(2) from GSoC 2023 by Theodore Preduta

Support audio descriptor for fstat(1).
sys/dev/audio/*.h: export only what we need for fstat.

nuke random stuff that does not exist anymore.

Add -O to print offsets; align columns properly.

Implement support for "pshared" POSIX semaphores.

Fixes lib/53273 (and Firefox's multi-process tab feature).

branches: 1.20.2;
Print BPF direction correctly.

Implement the BPF direction filter (BIOC[GS]DIRECTION). It provides backward
compatibility with BIOC[GS]SEESENT ioctl. The userland interface is the same
as FreeBSD.

This change also fixes a bug that the direction is misunderstand on some
environment by passing the direction to bpf_mtap*() instead of checking
m->m_pkthdr.rcvif.

Update fstat for audio(4) and pad(4) devices.

XXX - pullup 8.

Ok christos@.

branches: 1.17.6; 1.17.12;
Print the interface for bpf.

branches: 1.16.2;
put _KMEMUSER in the Makefile

Add rnd ops.

Merge tls-earlyentropy branch into HEAD.

branches: 1.13.4;
Fix races in /dev/u?random initialization and accounting.

- Push /dev/random `information-theoretic' accounting into cprng(9).
- Use percpu(9) for the per-CPU CPRNGs.
- Use atomics with correct memory barriers for lazy CPRNG creation.
- Remove /dev/random file kmem grovelling from fstat(1).

Rework rndsink(9) abstraction and adapt arc4random(9) and cprng(9).

rndsink(9):
- Simplify API.
- Simplify locking scheme.
- Add a man page.
- Avoid races in destruction.
- Avoid races in requesting entropy now and scheduling entropy later.

Periodic distribution of entropy to sinks reduces the need for the
last one, but this way we don't need to rely on periodic distribution
(e.g., in a future tickless NetBSD).

rndsinks_lock should probably eventually merge with the rndpool lock,
but we'll put that off for now.

cprng(9):
- Make struct cprng_strong opaque.
- Move rndpseudo.c parts that futz with cprng guts to subr_cprng.c.
- Fix kevent locking. (Is kevent locking documented anywhere?)
- Stub out rump cprng further until we can rumpify rndsink instead.
- Strip code to grovel through struct cprng_strong in fstat.

support printing rnd descriptor info

return stuff for ksem

Report jit'ed bpf fildes in fstat.

branches: 1.8.2; 1.8.8;
add all the possible fileops here, and if there is one we know about
print that instead of the passed name.

move _KMEMUSER higher!

need _KMEMUSER too.

sys/mqueue.h needs sys/types.h now

Fix sign-compare issues.

only print warnings if vflg.

branches: 1.2.2; 1.2.6; 1.2.8;
handle more types.

a better attempt on printing dtype_misc

src is too big these days to tolerate superfluous apostrophes. It's
"its", people!

Fix sign-compare issues.

branches: 1.11.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.10.20;
tweak for user.h cleanup.
while i'm here, remove unnecessary #include.

WARNS=3, knf, ansi prototypes

undo mallocvar.h changes!

Include "sys/mallocvar.h" with "_KERNEL" defined in time to avoid
build failure because MALLOC_DECLARE() is not defined.

use dprintf() instead of printf(), as other filesystem modules do

move the mapping of vnode type to file type to separate function getftype()
and use it where appropriate

set mode accordingly to file type (similarily to what nfs_filestat() does)
file type is now viewed correctly for files on ntfs

adapt to last ntfs changes - struct ntnode doesn't contain i_mode
anymore, get the mode from appropriate ntfsmount structure

branches: 1.2.2;
pull in <sys/mount.h> (with _KERNEL) to get definition of struct netexport,
used in struct ntfsmount

add support for ntfs

rearrange sys/mount.h so that all of the kernel-only parts are together
and not exposed to userland, except do expose struct mount if __EXPOSE_MOUNT
is defined. define __EXPOSE_MOUNT in the kmem grovellers that want
the definition. needed for ZFS.

Fix sign-compare issues.

branches: 1.5.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.4.4;
specfs changes for PR kern/37717 (raidclose() is no longer called on
shutdown). There are still problems with device access and a PR will be
filed.

- Kill checkalias(). Allow multiple vnodes to reference a single device.

- Don't play dangerous tricks with block vnodes to ensure that only one
vnode can describe a block device. Instead, prohibit concurrent opens of
block devices. As a bonus remove the unreliable code that prevents
multiple file system mounts on the same device. It's no longer needed.

- Track opens by vnode and by device. Issue cdev_close() when the last open
goes away, instead of abusing vnode::v_usecount to tell if the device is
open.

branches: 1.3.12;
tweak for user.h cleanup.
while i'm here, remove unnecessary #include.

Slurp in the struct mount at vp->v_mount and the struct specinfo at
vp->v_specinfo to get the proper st_dev and st_rdev numbers. We're
already picking over the kernel, so let's do it right. That means
also asserting the file type for the /dev/pts directory (S_IFDIR) and
nodes therein (S_IFCHR).

Remove getptsmajor(), since we no longer need it. Besides, it was
being used wrongly.

Add ptyfs.

rearrange sys/mount.h so that all of the kernel-only parts are together
and not exposed to userland, except do expose struct mount if __EXPOSE_MOUNT
is defined. define __EXPOSE_MOUNT in the kmem grovellers that want
the definition. needed for ZFS.

put _KMEMUSER in the Makefile

- Prevent tmpfs.h from inclusion in userland.
- Clean up and KNF tmpfs.h a little bit.

Fix sign-compare issues.

branches: 1.7.6;
Solve the fstat-wants-to-look-at-kernel-data-structures in a nicer
way: don't export the fs internals to innocent userspace programs
which just want to mount the file system.

include correct header

Remove clause 3 and 4 from TNF licenses

branches: 1.4.18;
remove __POOL_EXPOSE.

branches: 1.3.2;
tweak for user.h cleanup.
while i'm here, remove unnecessary #include.

Adapt to some name changes in the tmpfs_node structure (to fix the build
under vax with gcc 2.95). Provided by he@.

PR/32788: KAMADA Ken'ichi: add support for tmpfs

Add basic ZFS support to fstat(1).
XXX: Use a local zfs_znode.h for a znode_t definition because the ZFS
kernel code makes it too hard to include headers from userland.

Add basic ZFS support to fstat(1).
XXX: Use a local zfs_znode.h for a znode_t definition because the ZFS
kernel code makes it too hard to include headers from userland.