CVS log for src/sys/sys/sysctl.h

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Keyword substitution: kv
Default branch: MAIN

Assign static MIB numbers for kern.entropy.epoch.

This sidesteps any need for dynamically sized memory in userland to
resolve sysctl names to read it out, or for a new syscall interface
to sysctl resolution by name.

It would really be better to expose this through a page shared with
userland, so querying it doesn't cost a syscall, but this will serve
for now.

PR lib/59148: arc4random calls malloc so it can't be used in an ELF
constructor

Make __learn_tree always visible. It starts with __ anyway.

Add missing decls.

#define<tab>

fix pasto

Provide some snprintb(3) formats.

Sync with HEAD.

Expose KERN_BUFSLOP in <sys/sysctl.h>.

Sync with HEAD.

in struct evcnt_sysctl, change ev_strings[0] to ev_strings[].

GCC 10 does not like accesses to zero length arrays.

Sync with HEAD.

Sync with HEAD.

Add support for kernel hash statistics generation for vmstat -h/-H.  As
well as not needing any kmem grovelling, also much faster as it doesn't
need a kmem read for hash bucket and for each item in the hash bucket
chains.

Setting a socket buffer size stops autoscaling. Add a sysctl to
prevent this behaviour. The default is not changed.

Sync with HEAD

Implement KERN_PROC_CWD in sysctl(3)

Retrieve specified process current working directory.

Fixes PR kern/50620 by Thomas Klausner.

Sync with HEAD, resolve a few conflicts

As discussed in tech-kern:

- make sysctl kern.expose_address tri-state:
	0: no access
	1: access to processes with open /dev/kmem
	2: access to everyone
  defaults:
	0: KASLR kernels
	1: non-KASLR kernels

- improve efficiency by calling get_expose_address() per sysctl, not per
  process.

- don't expose addresses for linux procfs

- welcome to 8.99.27, changes to fill_*proc ABI

Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)

- Cleanup for dynamic sysctl:
  - Remove unused *_NAMES macros for sysctl.
  - Remove unused *_MAXID for sysctls.
- Move CTL_MACHDEP sysctl definitions for m68k into m68k/include/cpu.h and
  use them on all m68k machines.

Remove unused symbols from <sys/sysctl.h>

Drop: P_PAXMPROTECT and P_PAXNOMPROTECT.

These values are unused and the proper way to check PaX MPROTECT is to use
CTL_PROC.pid().PROC_PID_PAXFLAGS and check CTL_PROC_PAXFLAGS_MPROTECT.

Proposed on current-users@.
OK from <christos>

Sync with HEAD

Avoid complicated arithmetic involving NULL.

Pull up following revision(s) (requested by kamil in ticket #713):

	sys/modules/procfs/Makefile: revision 1.4
	sys/miscfs/procfs/procfs_vfsops.c: revision 1.98
	bin/ps/ps.1: revision 1.108
	sys/compat/linux/arch/i386/linux_ptrace.c: revision 1.32
	sys/miscfs/procfs/procfs_vnops.c: revision 1.198
	sys/kern/sys_ptrace_common.c: revision 1.23
	sys/kern/sys_ptrace_common.c: revision 1.24
	sbin/mount_procfs/mount_procfs.8: revision 1.36
	sys/kern/sys_ptrace_common.c: revision 1.25
	sys/kern/sys_ptrace.c: revision 1.5
	sys/compat/linux/arch/powerpc/linux_ptrace.c: revision 1.30
	sys/sys/proc.h: revision 1.342
	sys/kern/sys_ptrace_common.c: revision 1.26
	sys/miscfs/procfs/procfs_ctl.c: file removal
	sys/kern/sys_ptrace_common.c: revision 1.27
	sys/miscfs/procfs/procfs_subr.c: revision 1.109
	sys/kern/sys_ptrace_common.c: revision 1.28
	sys/secmodel/extensions/secmodel_extensions.c: revision 1.8
	sys/kern/sys_ptrace_common.c: revision 1.29
	sys/sys/ptrace.h: revision 1.62
	sys/compat/netbsd32/netbsd32_signal.c: revision 1.45
	share/man/man9/kauth.9: revision 1.109
	sys/miscfs/procfs/files.procfs: revision 1.12
	sys/compat/netbsd32/netbsd32.h: revision 1.115
	sys/miscfs/procfs/procfs.h: revision 1.72
	sys/compat/netbsd32/netbsd32_ptrace.c: revision 1.5
	sys/kern/kern_sig.c: revision 1.337
	sys/sys/kauth.h: revision 1.75
	sys/sys/sysctl.h: revision 1.224
	sys/kern/sys_ptrace_common.c: revision 1.30
	sys/kern/sys_ptrace_common.c: revision 1.31
	sys/kern/sys_ptrace_common.c: revision 1.32
	sys/kern/sys_ptrace_common.c: revision 1.33
	sys/compat/linux/arch/arm/linux_ptrace.c: revision 1.20
	sys/kern/sys_ptrace_common.c: revision 1.34
	sys/kern/sys_ptrace_common.c: revision 1.36
	sys/kern/kern_proc.c: revision 1.207
	sys/kern/kern_exit.c: revision 1.269
	doc/TODO.ptrace: revision 1.29

Make {s,g}et{db,fp,}regs work again for PK_32 processes
XXX: pullup-8

add disgusting magic to handle compat_netbsd32 as a module.

use process_*reg32 instead of struct *reg32.

Remove the filesystem tracing feature

This is a legacy interface from 4.4BSD, and it was
introduced to overcome shortcomings of ptrace(2) at that time, which are
no longer relevant (performance). Today /proc/#/ctl offers a narrow
subset of ptrace(2) commands and is not applicable for modern
applications use beyond simplistic tracing scenarios.

This removal will simplify kernel internals. Users will still be able to
use all the other /proc files.

This change won't affect other procfs files neither Linux compat
features within mount_procfs(8). /proc/#/ctl isn't available on Linux.

Remove:
 - /proc/#/ctl from mount_procfs(8)
 - P_FSTRACE note from the documentation of ps(1)
 - /proc/#/ctl and filesystem tracing documentation from mount_procfs(8)
 - KAUTH_REQ_PROCESS_PROCFS_CTL documentation from kauth(9)
 - source code file miscfs/procfs/procfs_ctl.c
 - PFSctl and procfs_doctl() from sys/miscfs/procfs/procfs.h
 - KAUTH_REQ_PROCESS_PROCFS_CTL from sys/sys/kauth.h
 - PSL_FSTRACE (0x00010000) from sys/sys/proc.h
 - P_FSTRACE (0x00010000) from sys/sys/sysctl.h

Reduce code complexity after removal of this functionality.

Update TODO.ptrace accordingly: remove two entries about /proc tracing.

Do not keep legacy notes as comments in the headers about removed

PSL_FSTRACE / P_FSTRACE, as this interface had little number of users
(close or equal to zero).
Proposed on tech-kern@.

All filesystem tracing utility users are encouraged to switch to ptrace(2).

Sponsored by <The NetBSD Foundation>

untangle the mess:
- factor out common code
- break each ptrace subcall to its own sub-function
  .. more to come ...
- reduce ifdef ugliness by moving it up top.
- factor out PT_IO and make PT_{READ,WRITE}_{I,D} use it
- factor out PT_DUMPCORE
- factor out sendsig code
  .. more to come ...

handle siginfo requests for ptrace32

ptrace: Partially undo PT_{READ,WRITE}_{I,D} and unbreak these commands

The refactored code did not work and was generating EFAULT.

Sponsored by <The NetBSD Foundation>

Merge the code back; the problem was that since we are reading/writing
to a kernel address for PT_{READ,WRITE}_{I,D} we need the kernel vmspace.
provide separate read and write functions to accomodate register functions
that need a size argument.

don't ignore error from copyout_piod

Use the proper process (the tracee) to get information about lwps and
registers and the tracer for vmspace.

Add new sysctl(3) entry: security.models.extensions.user_set_dbregs

Model this new sysctl(3) entry after "user_set_cpu_affinity" in the same
level of sysctl(3) switches.

Allow to read unconditionally Debug Registers (no change here). This is
convenient as even if a user of a debugger does not use hardware assisted
watchpoints/breakpoints, a debugger can still prompt these values to store
in an internal cache with context of registers. Reading them should have
no security concerns.

Add a paranoid MI switch that prohibits by default setting these registers
by a regular user (non-superuser). Make this switch disabled by default.
There are enough reserved bits out there to allow using them
unconditionally on hardened hosts.

Features shipped with Debug Registers are optional features in debuggers.
There is no reduction in elementary functionality.

Reviewed by <christos>

Sponsored by <The NetBSD Foundation>

update from HEAD

Remove duplicate words in comment.

Sync with HEAD

Remove the filesystem tracing feature

This is a legacy interface from 4.4BSD, and it was
introduced to overcome shortcomings of ptrace(2) at that time, which are
no longer relevant (performance). Today /proc/#/ctl offers a narrow
subset of ptrace(2) commands and is not applicable for modern
applications use beyond simplistic tracing scenarios.

This removal will simplify kernel internals. Users will still be able to
use all the other /proc files.

This change won't affect other procfs files neither Linux compat
features within mount_procfs(8). /proc/#/ctl isn't available on Linux.

Remove:
 - /proc/#/ctl from mount_procfs(8)
 - P_FSTRACE note from the documentation of ps(1)
 - /proc/#/ctl and filesystem tracing documentation from mount_procfs(8)
 - KAUTH_REQ_PROCESS_PROCFS_CTL documentation from kauth(9)
 - source code file miscfs/procfs/procfs_ctl.c
 - PFSctl and procfs_doctl() from sys/miscfs/procfs/procfs.h
 - KAUTH_REQ_PROCESS_PROCFS_CTL from sys/sys/kauth.h
 - PSL_FSTRACE (0x00010000) from sys/sys/proc.h
 - P_FSTRACE (0x00010000) from sys/sys/sysctl.h

Reduce code complexity after removal of this functionality.

Update TODO.ptrace accordingly: remove two entries about /proc tracing.

Do not keep legacy notes as comments in the headers about removed
PSL_FSTRACE / P_FSTRACE, as this interface had little number of users
(close or equal to zero).

Proposed on tech-kern@.

All filesystem tracing utility users are encouraged to switch to ptrace(2).

Sponsored by <The NetBSD Foundation>

Sync with HEAD

Sync with HEAD

Update a comment.  No functional change.

Add new sysctl variable proc.curproc.paxflags so a process can determine
which flags were set for it.  Define some values for the variable:

	CTL_PROC_PAXFLAGS_{ASLR,MPROTECT,GUARD}

remove sys/wait.h just added, put it in the file that needed it (kvm_proc.c)

no need to pass the coredump flag to exit1() since it is set and known
in one place.

Sync with HEAD

Include <sys/kernel.h> only if it's needed.
(fix build failure)

Fix dlopen()/dlclose()+RUMP_USE_CTOR to not leave dangling pointers around.

Sync with HEAD (as of 26th Dec)

move CTL_VM constants to uvm_param.h, leaving a comment behind.

Add KERN_PROC_PATHNAME and VM_PROC_MAP used by libproc.

Sync with HEAD

Extend RUMP_USE_CTOR to SYSCTL_SETUP(), similar to what is already
done in MODULE().  The sysctl tree nodes from all components which
were loaded when rump_init() was called now get created -- mimics the
monolithic kernel.

No change to the monolithic kernel.

Don't nest structure definitions.

Rebase to HEAD as of a few days ago.

Rebase.

Allow fill_kproc2() to be used by more than sysctl.

Add asysctl(3) and asysctlbyname(3) wrappers for the common idiom of
fetching dynamically sized data via sysctl.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Ensure that the top level sysctl nodes (kern, vfs, net, ...) exist before
the sysctl link sets are processed, and remove redundancy.

Shaves >13kB off of an amd64 GENERIC, not to mention >1k duplicate
lines of code.

Put cprng sysctls into subr_cprng.c.  Also, make sysctl_prng static
in subr_cprng and get rid of SYSCTL_PRIVATE namespace leak macro.

Fixes ping(8) when run against a standalone rump kernel due to appearance
of the kern.urandom sysctl node (in case someone was wondering ...)

Fix typos in comments.

sync with head

Put parens arund the negative numbers so 0 CTL_XX will cause a syntax error.

resync with head

Make the inclusion of <sys/cprng.h> a private matter for sysctl.  No reason
to expose the rest of the kernel to it.

sync with head

sync with (a bit old) head

Avoid exposing some headers to userland

Only define 'struct kinfo_proc' if _KERNEL or _KMEMUSER is defined.
All 'normal' programs should be using kinfo_proc2 instead.

Fix misspelling:  accommodate is a long enough word to have room for two 'c's
and two 'm's.

Resync to 2012-11-19 00:00:00 UTC

sync with head

remove KERN_USRSTACK

add KERN_USRSTACK (this is not dynamically defined for FreeBSD compatibility)

Apply patch, requested by dsl in ticket 1769:
	sys/sys/sysctl.h		patch
define CTLTYPE_LONG, needed for ticket 1770

Pull up following revision(s) (requested by dsl in ticket #305):
	sys/sys/sysctl.h: patch

Define CTLTYPE_LONG in preparation for more pullups.

Add a new resource to limit the number of lwps per user, RLIMIT_NTHR. There
is a global sysctl kern.maxlwp to control this, which is by default 2048.
The first lwp of each process or kernel threads are not counted against the
limit. To show the current resource usage per user, I added a new sysctl
that dumps the uidinfo structure fields.

Add some pre-processor magic to verify that the type of the data item
  passed to sysctl_createv() actually matches the declared type for
  the item itself.
In the places where the caller specifies a function and a structure
  address (typically the 'softc') an explicit (void *) cast is now needed.
Fixes bugs in sys/dev/acpi/asus_acpi.c sys/dev/bluetooth/bcsp.c
  sys/kern/vfs_bio.c sys/miscfs/syncfs/sync_subr.c and setting
  AcpiGbl_EnableAmlDebugObject.
(mostly passing the address of a uint64_t when typed as CTLTYPE_INT).
I've test built quite a few kernels, but there may be some unfixed MD
  fallout. Most likely passing &char[] to char *.
Also add CTLFLAG_UNSIGNED for unsiged decimals - not set yet.

sync with head

merge to -current.

extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

First step of random number subsystem rework described in
<20111022023242.BA26F14A158@mail.netbsd.org>.  This change includes
the following:

	An initial cleanup and minor reorganization of the entropy pool
	code in sys/dev/rnd.c and sys/dev/rndpool.c.  Several bugs are
	fixed.  Some effort is made to accumulate entropy more quickly at
	boot time.

	A generic interface, "rndsink", is added, for stream generators to
	request that they be re-keyed with good quality entropy from the pool
	as soon as it is available.

	The arc4random()/arc4randbytes() implementation in libkern is
	adjusted to use the rndsink interface for rekeying, which helps
	address the problem of low-quality keys at boot time.

	An implementation of the FIPS 140-2 statistical tests for random
	number generator quality is provided (libkern/rngtest.c).  This
	is based on Greg Rose's implementation from Qualcomm.

	A new random stream generator, nist_ctr_drbg, is provided.  It is
	based on an implementation of the NIST SP800-90 CTR_DRBG by
	Henric Jungheim.  This generator users AES in a modified counter
	mode to generate a backtracking-resistant random stream.

	An abstraction layer, "cprng", is provided for in-kernel consumers
	of randomness.  The arc4random/arc4randbytes API is deprecated for
	in-kernel use.  It is replaced by "cprng_strong".  The current
	cprng_fast implementation wraps the existing arc4random
	implementation.  The current cprng_strong implementation wraps the
	new CTR_DRBG implementation.  Both interfaces are rekeyed from
	the entropy pool automatically at intervals justifiable from best
	current cryptographic practice.

	In some quick tests, cprng_fast() is about the same speed as
	the old arc4randbytes(), and cprng_strong() is about 20% faster
	than rnd_extract_data().  Performance is expected to improve.

	The AES code in src/crypto/rijndael is no longer an optional
	kernel component, as it is required by cprng_strong, which is
	not an optional kernel component.

	The entropy pool output is subjected to the rngtest tests at
	startup time; if it fails, the system will reboot.  There is
	approximately a 3/10000 chance of a false positive from these
	tests.  Entropy pool _input_ from hardware random numbers is
	subjected to the rngtest tests at attach time, as well as the
	FIPS continuous-output test, to detect bad or stuck hardware
	RNGs; if any are detected, they are detached, but the system
	continues to run.

	A problem with rndctl(8) is fixed -- datastructures with
	pointers in arrays are no longer passed to userspace (this
	was not a security problem, but rather a major issue for
	compat32).  A new kernel will require a new rndctl.

	The sysctl kern.arandom() and kern.urandom() nodes are hooked
	up to the new generators, but the /dev/*random pseudodevices
	are not, yet.

	Manual pages for the new kernel interfaces are forthcoming.

add proc_compare prototype.

As a precaution, add sys/param.h explicitly to some headers that will
no longer get it via sys/ucred.h and don't already include it
explicitly. These should in turn be removed when it can be confirmed
that it's safe to do so. (Because sys/param.h is full of things that
are often tested with #if, it's not in general safe to remove it
without checking, as such tests fail silently if the symbol goes
missing.)

Sync with HEAD.

sync with head

Kill CTL_EMUL_NAMES.

Remove IRIX emulation

Remove Darwin, MACH and Mach-O support.

sync with head

Sync with HEAD

Add a sysctl to retrieve evcnts from the kernel.  You can tell it to
limit to a specific type and/or all or just evcnts with non-zero counts.

Move sysctl routines from init_sysctl.c to kern_descrip.c (for
descriptors) and kern_proc.c (for processes).  This makes them
usable in a rump kernel, in case somebody was wondering.

Use the L_ flags instead of the P_ flags for lwps.

According to nxr.netbsd.org nothing uses CTL_NAMES now.

sync with head

Fix comment.

Replace a large number of link set based sysctl node creations with
calls from subsystem constructors.  Benefits both future kernel
modules and rump.

no change to sysctl nodes on i386/MONOLITHIC & build tested i386/ALL

sync with head

In sysctl_realloc(), don't make 'i' act as both an child-array
iterator and the length of the old child array, but introduce a
new variable, 'olen', for the latter purpose.

In sysctl_alloc(), name a constant.

Introduce sysctl_log_print(), a handy debug routine.

No functional changes intended.

sync with head.

Sync with HEAD.

Constify the fourth argument of sysctlbtname(3) (ie. `newp', the pointer to
the new value).

This change sync sysctl(3) and sysctlbtname(3) prototypes.

No objection on <tech-userlevel>

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

Pull up following revision(s) (requested by mrg in ticket #622):
	bin/csh/csh.1: revision 1.46
	bin/csh/func.c: revision 1.37
	bin/ps/print.c: revision 1.111
	bin/ps/ps.c: revision 1.74
	bin/sh/miscbltin.c: revision 1.38
	bin/sh/sh.1: revision 1.92 via patch
	external/bsd/top/dist/machine/m_netbsd.c: revision 1.7
	lib/libkvm/kvm_proc.c: revision 1.82
	sys/arch/mips/mips/cpu_exec.c: revision 1.55
	sys/compat/darwin/darwin_exec.c: revision 1.57
	sys/compat/ibcs2/ibcs2_exec.c: revision 1.73
	sys/compat/irix/irix_resource.c: revision 1.15
	sys/compat/linux/arch/amd64/linux_exec_machdep.c: revision 1.16
	sys/compat/linux/arch/i386/linux_exec_machdep.c: revision 1.12
	sys/compat/linux/common/linux_limit.h: revision 1.5
	sys/compat/osf1/osf1_resource.c: revision 1.14
	sys/compat/svr4/svr4_resource.c: revision 1.18
	sys/compat/svr4_32/svr4_32_resource.c: revision 1.17
	sys/kern/exec_subr.c: revision 1.62
	sys/kern/init_sysctl.c: revision 1.160
	sys/kern/kern_exec.c: revision 1.288
	sys/kern/kern_resource.c: revision 1.151
	sys/sys/param.h: patch
	sys/sys/resource.h: revision 1.31
	sys/sys/sysctl.h: revision 1.184
	sys/uvm/uvm_extern.h: revision 1.153
	sys/uvm/uvm_glue.c: revision 1.136
	sys/uvm/uvm_mmap.c: revision 1.128
	usr.bin/systat/ps.c: revision 1.32
- - add new RLIMIT_AS (aka RLIMIT_VMEM) resource that limits the total
address space available to processes.  this limit exists in most other
modern unix variants, and like most of them, our defaults are unlimited.
remove the old mmap / rlimit.datasize hack.
- - adds the VMCMD_STACK flag to all the stack-creation vmcmd callers.
it is currently unused, but was added a few years ago.
- - add a pair of new process size values to kinfo_proc2{}. one is the
total size of the process memory map, and the other is the total size
adjusted for unused stack space (since most processes have a lot of
this...)
- - patch sh, and csh to notice RLIMIT_AS.  (in some cases, the alias
RLIMIT_VMEM was already present and used if availble.)
- - patch ps, top and systat to notice the new k_vm_vsize member of
kinfo_proc2{}.
- - update irix, svr4, svr4_32, linux and osf1 emulations to support
this information.  (freebsd could be done, but that it's best left
as part of the full-update of compat/freebsd.)
this addresses PR 7897.  it also gives correct memory usage values,
which have never been entirely correct (since mmap), and have been
very incorrect since jemalloc() was enabled.
tested on i386 and sparc64, build tested on several other platforms.
thanks to many folks for feedback and testing but most espcially
chuq and yamt for critical suggestions that lead to this patch not
having a special ugliness i wasn't happy with anyway :-)

- add new RLIMIT_AS (aka RLIMIT_VMEM) resource that limits the total
address space available to processes.  this limit exists in most other
modern unix variants, and like most of them, our defaults are unlimited.
remove the old mmap / rlimit.datasize hack.

- adds the VMCMD_STACK flag to all the stack-creation vmcmd callers.
it is currently unused, but was added a few years ago.

- add a pair of new process size values to kinfo_proc2{}. one is the
total size of the process memory map, and the other is the total size
adjusted for unused stack space (since most processes have a lot of
this...)

- patch sh, and csh to notice RLIMIT_AS.  (in some cases, the alias
RLIMIT_VMEM was already present and used if availble.)

- patch ps, top and systat to notice the new k_vm_vsize member of
kinfo_proc2{}.

- update irix, svr4, svr4_32, linux and osf1 emulations to support
this information.  (freebsd could be done, but that it's best left
as part of the full-update of compat/freebsd.)


this addresses PR 7897.  it also gives correct memory usage values,
which have never been entirely correct (since mmap), and have been
very incorrect since jemalloc() was enabled.

tested on i386 and sparc64, build tested on several other platforms.

thanks to many folks for feedback and testing but most espcially
chuq and yamt for critical suggestions that lead to this patch not
having a special ugliness i wasn't happy with anyway :-)

Sync with HEAD.

Change major()/minor() to return 32-bit types again, called
devmajor_t/devminor_t, as proposed on tech-kern.
This avoids 64-bit arithmetics and 64-bit printf formats in parts
of the kernel where it is not really useful, and helps clarity.

Provide compatibility for pre-christos-time_t sysv sysctls.

Sync with HEAD.

Sync with HEAD.

merge christos-time_t

sync with head.

Librate sysctl_setup_func typedef from the clutches of _MODULE and
stuff it in kern_sysctl.c where its only sensible use is.

make both tdevs uint32_t to preserve binary compatibility.

merge with head.

Update haad-dm branch to haad-dm-base2.

Move some sysctl node creations away from linksets and into the
constructors for subsystems.

XXX: CTLFLAG_PERMANENT is non-sensible.

merge with head.

Remove LKMs and switch to the module framework, pass 1.

Proposed on tech-kern@.

Sync with head.

Sync with HEAD.

Sync with HEAD.

Sync with wrstuden-revivesa-base-2.

Make _POSIX_TZNAME_MAX=6 per SUSv3, from Andy Shevchenko

Sync with HEAD.

sync with head.

sync with head.

PR kern/37917 /bin/ps no longer shows zombies

Sync with HEAD.

Welcome to the time_t=long long dev_t=uint64_t branch.

sync with head.

sync with HEAD

sync with head.

#include <stdbool.h> if !_KERNEL && !_STANDALONE

Add support for CTLTYPE_BOOL

Sync with HEAD.

sync with head

sync with HEAD

Sync with HEAD

Patch up sysctl locking:

- Lock processes, credentials, filehead etc correctly.
- Acquire a read hold on sysctl_treelock if only doing a query.
- Don't wire down the output buffer. It doesn't work correctly and the code
  regularly does long term sleeps with it held - it's not worth it.
- Don't hold locks other than sysctl_lock while doing copyout().
- Drop sysctl_lock while doing copyout / allocating memory in a few places.
- Don't take kernel_lock for sysctl.
- Fix a number of bugs spotted along the way

Sync with head.

sync with head.

fix compile error (no previous prototype for 'sysctl_FOO') when
SYSCTL_SETUP() is used in LKM.

sync with HEAD

sync with head.

Sync with HEAD.

Follow the merge of pmap.c on i386 and amd64 and move
pmap_init_tmp_pgtbl into arch/x86/x86/pmap.c. Modify the ACPI wakeup
code to restore CR4 before jumping back into kernel space as the large
page option might cover that.

Sync with head.

sync with head.

Add _SC_NPROCESSORS_ONLN and _SC_NPROCESSORS_CONF for sysconf(). These
are extensions but are provided by many Unix systems.

sync with head.

Sync with head.

Sync with head.

merge yamt-idlelwp branch.  asked by core@.  some ports still needs work.

from doc/BRANCHES:

	idle lwp, and some changes depending on it.

	1. separate context switching and thread scheduling.
	   (cf. gmcgarry_ctxsw)
	2. implement idle lwp.
	3. clean up related MD/MI interfaces.
	4. make scheduler(s) modular.

- Remove KERN_SCHED, do not break KERN_MAXID and use dynamic node creation,
  since we are moving to dynamic sysctl anyway - note by <mrg>.
- Remove sched_slept() hook - we are not going to use it.

Some changes mainly for top/ps:

- Add an optional name field to struct lwp.
- Count the total number of context switches + involuntary,
  not voluntary + involuntary.
- Mark the idle threads as LSIDL when not running, otherwise
  they show up funny in a top(1) that shows threads.
- Make pctcpu and cpticks per-LWP attributes.
- Add to kinfo_lwp: cpticks, pctcpu, pid, name.

Sync with head.

Sync with HEAD.

Add the LWP's runtime to kinfo_lwp.

Checkpoint:

- Addition of scheduler-specific pointers in the struct proc, lwp and
  schedstate_percpu.
- Addition of sched_lwp_fork(), sched_lwp_exit() and sched_slept() hooks.
- mi_switch() now has only one argument.
- sched_nextlwp(void) becomes sched_switch(struct lwp *) and does an
  enqueueing of LWP.
- Addition of general kern.sched sysctl node.
- Remove twice called uvmexp.swtch++, other cleanups.

Discussed on tech-kern@

- sync with head.
- move sched_changepri back to kern_synch.c as it doesn't know PPQ anymore.

sync with head.

The pre-kauth 'struct ucread' and 'struct pcred' are now only used in the
(depracted some time ago) 'struct kinfo_proc' returned by sysctl.
Move the definitions to sys/syctl.h and rename in order to ensure all the
users are located.

Change the process/lwp flags seen by userland via sysctl back to the
P_*/L_* naming convention, and rename the in-kernel flags to avoid
conflict. (P_ -> PK_, L_ -> LW_ ). Add back the (now unused) LSDEAD
constant.

Restores source compatibility with pre-newlock2 tools like ps or top.

Reviewed by Andrew Doran.

Merge newlock2 to head.

Add a compat flag to match LPR_DETACHED.

Sync with head.

sync with head.

Checkpoint work in progress.

sync with head.

PR/34837: Mindaguas: Add SysV SHM dynamic reallocation and locking to the
physical memory

Sync with head.

__unused removal on arguments; approved by core.

put back p_ename, lost in the previous commit.

implement kern.arandom properly, instead of lying about it and only filling
the first 4 bytes of the array with random data.

add the emulation in kinfo_proc2

sync with head

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

Back out previous (p_flag2).

In 30 minutes from now Jason Thorpe will come up with an implementation
of a proplib dictionary in struct proc, so adding an int doesn't really
make any sense.

Until we figure out the Perfect Way of adding flags to processes, add
a p_flag2. No objections on tech-kern@.

Input from simonb@, thanks!

sync with head.

sync with head

First take at security model abstraction.

- Add a few scopes to the kernel: system, network, and machdep.

- Add a few more actions/sub-actions (requests), and start using them as
  opposed to the KAUTH_GENERIC_ISSUSER place-holders.

- Introduce a basic set of listeners that implement our "traditional"
  security model, called "bsd44". This is the default (and only) model we
  have at the moment.

- Update all relevant documentation.

- Add some code and docs to help folks who want to actually use this stuff:

  * There's a sample overlay model, sitting on-top of "bsd44", for
    fast experimenting with tweaking just a subset of an existing model.

    This is pretty cool because it's *really* straightforward to do stuff
    you had to use ugly hacks for until now...

  * And of course, documentation describing how to do the above for quick
    reference, including code samples.

All of these changes were tested for regressions using a Python-based
testsuite that will be (I hope) available soon via pkgsrc. Information
about the tests, and how to write new ones, can be found on:

	http://kauth.linbsd.org/kauthwiki

NOTE FOR DEVELOPERS: *PLEASE* don't add any code that does any of the
following:

  - Uses a KAUTH_GENERIC_ISSUSER kauth(9) request,
  - Checks 'securelevel' directly,
  - Checks a uid/gid directly.

(or if you feel you have to, contact me first)

This is still work in progress; It's far from being done, but now it'll
be a lot easier.

Relevant mailing list threads:

http://mail-index.netbsd.org/tech-security/2006/01/25/0011.html
http://mail-index.netbsd.org/tech-security/2006/03/24/0001.html
http://mail-index.netbsd.org/tech-security/2006/04/18/0000.html
http://mail-index.netbsd.org/tech-security/2006/05/15/0000.html
http://mail-index.netbsd.org/tech-security/2006/08/01/0000.html
http://mail-index.netbsd.org/tech-security/2006/08/25/0000.html

Many thanks to YAMAMOTO Takashi, Matt Thomas, and Christos Zoulas for help
stablizing kauth(9).

Full credit for the regression tests, making sure these changes didn't break
anything, goes to Matt Fleming and Jaime Fournier.

Happy birthday Randi! :)

sync with head.

Fix all the -D*DEBUG* code that it was rotting away and did not even compile.
Mostly from Arnaud Lacombe, many thanks!

sync with head

ugh.. more stuff that's overdue and should not be in 4.0: remove the
sysctl(9) flags CTLFLAG_READONLY[12]. luckily they're not documented
so it's only half regression.

only two knobs used them; proc.curproc.corename (check added in the
existing handler; its CTLFLAG_ANYWRITE, yay) and net.inet.ip.forwsrcrt,
that got its own handler now too.

sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

sync with head.

Sync with head.

sync with head.

Make i/o statistics collection more generic, include tape drives and
nfs mounts in the set of devices that statistics will be reported on.

sync with head.

Merge 2006-03-28 NetBSD-current into the "peter-altq" branch.

Move struct clockinfo (KERN_CLOCKRATE sysctl) from <sys/time.h> to
<sys/sysctl.h>.

sync with head.

Fix typos, reported by Alexey Dobriyan ("Gathered from Linux"),
forwarded by jmc@openbsd.

complete constification of the sysctl() user side

sync with head.

Add initial (but unfinished) COMPAT_LINUX32 for amd64. This is good enough so
that the i386 license manager part of amd64 version of Fluent works.

While I'm here, add SysV IPC to COMPAT_LINUX/amd64

move setid core externs near defcorename, as requested by yamt@.

implement a security.setid_core node as discussed on tech-kern@ and
tech-security@.

sync with head.

remove security node sysctl objects; they are now created using CTL_CREATE.

Fix the sense of #else/#endif comments.

inline -> __inline

u_intN_t -> uintN_t

Remove leading __ from __(const|inline|signed|volatile) -- it is obsolete.

merge ktrace-lwp.

Sync with HEAD. Here we go again...

Introduce ``security.curtain'', new node for security features and
settings, and new variable for controlling access to objects based
on user-id.

Implement kern.hardclock_ticks.

Add in tape statistics gathering definitions, add tape.h as a file
to be installed.

Change the rest of the sysctl subsystem to use const consistently.
The __UNCONST macro is now used only where necessary and the RW macros
are gone.  Most of the changes here are consumers of the
sysctl_createv(9) interface that now takes a pair of const pointers
which used not to be.

Add a new sysctl 'cp_id' that returns the array of cpu id values. Requested by
me, implemented by atatat.

Pull up revision 1.134 (requested by elad in ticket #389):
Some changes in veriexec.
New features:
- Add a veriexec_report() routine to make most reporting consistent and
remove some common code.
- Add 'strict' mode that controls how veriexec behaves.
- Add sysctl knobs:
o kern.veriexec.verbose controls verbosity levels. Value: 0, 1.
o kern.veriexec.strict controls strict level. Values: 0, 1, 2. See
documentation in sysctl(3) for details.
o kern.veriexec.algorithms returns a string with a space separated
list of supported hashing algorithms in veriexec.
- Updated documentation in man pages for sysctl(3) and sysctl(8).
Bug fixes:
- veriexec_removechk(): Code cleanup + handle FINGERPRINT_NOTEVAL
correctly.
- exec_script(): Don't pass 0 as flag when executing a script; use the
defined VERIEXEC_INDIRECT - which is 1. Makes indirect execution
enforcement work.
- Fix some printing formats and types..

Properly fix the constipated lossage wrt -Wcast-qual and the sysctl
code.  I know it's not the prettiest code, but it seems to work rather
well in spite of itself.

Sprinkle const.

Some changes in veriexec.

New features:

  - Add a veriexec_report() routine to make most reporting consistent and
    remove some common code.
  - Add 'strict' mode that controls how veriexec behaves.
  - Add sysctl knobs:
     o kern.veriexec.verbose controls verbosity levels. Value: 0, 1.
     o kern.veriexec.strict controls strict level. Values: 0, 1, 2. See
       documentation in sysctl(3) for details.
     o kern.veriexec.algorithms returns a string with a space separated
       list of supported hashing algorithms in veriexec.
  - Updated documentation in man pages for sysctl(3) and sysctl(8).

Bug fixes:

  - veriexec_removechk(): Code cleanup + handle FINGERPRINT_NOTEVAL
    correctly.
  - exec_script(): Don't pass 0 as flag when executing a script; use the
    defined VERIEXEC_INDIRECT - which is 1. Makes indirect execution
    enforcement work.
  - Fix some printing formats and types..

sync with -current

Sync with HEAD.

sync with head.  xen and whitespace.  xen part is not finished.

Revert the change that made kern.file2 and net.*.*.pcblist into nodes
instead of structs.  It had other deleterious side-effects that are
rather nasty.  Another solution must be found.

Change types of kern.file2 and net.*.*.pcblist to NODE

Forgot to remove ki_ocomm from kinfo_file2 before adding it.  Sorry.

Add kern.file2.  As kern.proc2 is to kern.proc, so is kern.file2 to
kern.file, namely a 32/64 bit clean sysctl interface to the same data.
It also borrows a few things from struct vnode (if applicable) and
from struct proc, just to tie things together a bit more.

You can walk this list "by file" or "by pid".  The former method is
similar to kern.file but omits the filehead, and the latter can give
you duplicates if multiple processes have the same struct file open,
but tells you which process it is.

Sync with HEAD.

Hi Perry!

Expose sysctl_root node to kernel sources.  It will be used by FreeBSD sysctl
emulation.

sync with head.

Sync with HEAD.

de-__P

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD.

#if SYSCTL_INCLUDE_DESCR -> #ifdef SYSCTL_INCLUDE_DESCR

Sync with HEAD

Add the emul.mach.exception.hang sysctl, which helps catching programs
that die before they disapear. This is usefull because we cannot start
Mach-O binaries under gdb. We attach the hung process instead.

Pull up revision 1.125 (requested by atatat in ticket #374):
Tweak sysctl setup functions (the macros, actually) for use in lkms,
and tweak lkminit_*.c (where applicable) to call them, and to call
sysctl_teardown() when being unloaded.
This consists of (1) making setup functions not be static when being
compiled as lkms (change to sys/sysctl.h), (2) making prototypes
visible for the various setup functions in header files (changes to
various header files), and (3) making simple "load" and "unload"
functions in the actual lkminit stuff.
linux_sysctl.c also needs its root exposed (ie, made not static) for
this (when built as an lkm).

Tweak sysctl setup functions (the macros, actually) for use in lkms,
and tweak lkminit_*.c (where applicable) to call them, and to call
sysctl_teardown() when being unloaded.

This consists of (1) making setup functions not be static when being
compiled as lkms (change to sys/sysctl.h), (2) making prototypes
visible for the various setup functions in header files (changes to
various header files), and (3) making simple "load" and "unload"
functions in the actual lkminit stuff.

linux_sysctl.c also needs its root exposed (ie, made not static) for
this (when built as an lkm).

Pullup rev 1.124 (requested by atatat in ticket #193)

Remove dynamic sysctl node version 0 from the tree.

Pull up revision 1.123 (requested by atatat in ticket #180)

Missing parens get cast wrong.  Grr.

Remove dynamic sysctl node version 0 from the tree.  It seemed okay at
first, but quickly showed its shortcomings.  The version 1 node we're
now using should be good for a while.

Missing parens get cast wrong.  Grr.

Pull up revision 1.122 (requested by atatat in ticket #173):
Move a type cast (wrt description handling) and do a little lint
cleaning.

Move a type cast (wrt description handling) and do a little lint
cleaning.

PR/9347: Eric E. Fair: socket buffer pool exhaustion leads to system deadlock
and unkillable processes.
1. Introduce new SBSIZE resource limit from FreeBSD to limit socket buffer
   size resource.
2. make sokvareserve interruptible, so processes ltsleeping on it can be
   killed.

Pullup rev 1.120 (requested by atatat in ticket #109)

s/SYSCTL_USE_DESCR/SYSCTL_INCLUDE_DESCR/g since the latter name seems
more popular.  Or at least, less unpopular.

s/SYSCTL_USE_DESCR/SYSCTL_INCLUDE_DESCR/g since the latter name seems
more popular.  Or at least, less unpopular.

Pullup rev 1.119 (requested by atatat in ticket #107)

Invert the meaning of SYSCTL_NO_DESCR by calling it SYSCTL_USE_DESCR
instead.  This makes it an option to include the descriptions, as
opposed to an option to *exclude* them.

Invert the meaning of SYSCTL_NO_DESCR by calling it SYSCTL_USE_DESCR
instead.  This makes it an option to include the descriptions, as
opposed to an option to *exclude* them.

Pullup rev 1.118 (requested by atatat in ticket #105)

Standalone programs should not use stddef.h.  They are more like the
kernel, so they must use sys/systm.h instead.

Standalone programs should not use stddef.h.  They are more like the
kernel, so they must use sys/systm.h instead.

Pull up revision 1.117 (requested by atatat in ticket #87)

Include new opt_sysctl.h here, and use SYSCTL_NO_DESCR for eliminating
properly declared descriptions.

Include new opt_sysctl.h here, and use SYSCTL_NO_DESCR for eliminating
properly declared descriptions.

Introduce sysc_init_field() and use it to make the code a little less ugly.
Also, fix another gcc2-unfriendly initialization.

Move sysctlbyname(), sysctlnametomib(), and sysctlgetmibinfo() from
sysctl(8) into libc, making the minor number jump.  Add prototypes to
sys/sysctl.h, fix sets, modify man pages, etc.  That oughta cover it.

Argh.  That should be "_LP64", not "LP64".  Many, many thanks to martin
for helping with this and verifying the netbsd32 compat fix.

Framework for sysctl descriptions.  Implementation to follow shortly.

New node version and layout.  This should take care of the netbsd32
emulation problem, formalizes the versioning (should it ever be needed
again), and provides a slot for descriptions.

Implement sysctllog and sysctl_teardown(), which unwinds the log.

Tango on sysctl_createv() and flags.  The flags have all been renamed,
and sysctl_createv() now uses more arguments.

Add PTRTOUINT64() and UINT64TOPTR() macros to sys/sysctl.h for use by
kern.proc, kern.proc2, kern.lwp, and kern.buf.

Define more MIB for kern.buf so that specific buffers can be selected
(only all/all is supported right now), and use a 32/64 bit agnostic
structure for communcating buffer information to userland.

Convert systat to the new kern.buf method.

Clean up the vm.buf* handling a little.  There's no actual need to
record the dynamically assigned OIDs, since sysctl_data can tell us
what we're looking at.

Oh, and fix a typo in a comment.

Uppercase CPU, plural is CPUs.

don't include sys/param.h; the man page says that the application should
do that. per discussions in core.

Add brief comments to the sysctlnode members that describe what they
are.

Cut SYSCTL_DEFSIZE in half, which results in roughly a 40% improvement
in memory usage by sysctlnodes (on my laptop), along with a dozen
extra calls to sysctl_realloc() during kernel bootstrap (which no one
should notice anyway).

Include "sys/param.h" to fix build problems in applications which include
this header file.

Replace the traditional buffer memory management -- based on fixed per buffer
virtual memory reservation and a private pool of memory pages -- by a scheme
based on memory pools.

This allows better utilization of memory because buffers can now be allocated
with a granularity finer than the system's native page size (useful for
filesystems with e.g. 1k or 2k fragment sizes).  It also avoids fragmentation
of virtual to physical memory mappings (due to the former fixed virtual
address reservation) resulting in better utilization of MMU resources on some
platforms.  Finally, the scheme is more flexible by allowing run-time decisions
on the amount of memory to be used for buffers.

On the other hand, the effectiveness of the LRU queue for buffer recycling
may be somewhat reduced compared to the traditional method since, due to the
nature of the pool based memory allocation, the actual least recently used
buffer may release its memory to a pool different from the one needed by a
newly allocated buffer. However, this effect will kick in only if the
system is under memory pressure.

sysctl_funcs is a set of symbols in text segment (function pointers),
and we must use __link_set_add_text() instead of __link_set_add_data().

The missing pieces of PROC_PID_STOPEXIT/P_STOPEXIT, a sysctl tweakable
flag that makes a process stop as it exits.

Not a published interface...yet

Dynamic sysctl.

Gone are the old kern_sysctl(), cpu_sysctl(), hw_sysctl(),
vfs_sysctl(), etc, routines, along with sysctl_int() et al.  Now all
nodes are registered with the tree, and nodes can be added (or
removed) easily, and I/O to and from the tree is handled generically.

Since the nodes are registered with the tree, the mapping from name to
number (and back again) can now be discovered, instead of having to be
hard coded.  Adding new nodes to the tree is likewise much simpler --
the new infrastructure handles almost all the work for simple types,
and just about anything else can be done with a small helper function.

All existing nodes are where they were before (numerically speaking),
so all existing consumers of sysctl information should notice no
difference.

PS - I'm sorry, but there's a distinct lack of documentation at the
moment.  I'm working on sysctl(3/8/9) right now, and I promise to
watch out for buses.

Simon has persuaded me to remove the 'sizeof kinfo_drivers' field.

Add kern.root_partition (because sysinst needs to know it).
Add kern.drivers - reports installed driver names and major numbers.

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

Patches provided by Joel Baker in PR 22364, verified by myself.

Make somaxkva modifyable via sysctl (and compile-time) instead of
hardcoding its size.

Apply the aborted ktrace-lwp changes to a specific branch.  This is just for
others to review, I'm concerned that patch fuziness may have resulted in some
errant code being generated but I'll look at that later by comparing the diff
from the base to the branch with the file I attempt to apply to it.  This will,
at the very least, put the changes in a better context for others to review
them and attempt to tinker with removing passing of 'struct lwp' through
the kernel.

Back out the lwp/ktrace changes. They contained a lot of colateral damage,
and need to be examined and discussed more.

Pass lwp pointers throughtout the kernel, as required, so that the lwpid can
be inserted into ktrace records.  The general change has been to replace
"struct proc *" with "struct lwp *" in various function prototypes, pass
the lwp through and use l_proc to get the process pointer when needed.

Bump the kernel rev up to 1.6V

Based on the feedback on wasabisystems.com!bsd-api-discuss (sure wish
people would read that list in a more timely fashion!), change the new
64-bit memory reporting sysctl nodes to report bytes.  This should not
be a problem, since it's only a week old, and no applications use the
new nodes yet.

Add p_svuid and p_svgid to kinfo_proc2.  Populate them in the kernel
and in libkvm.  Then teach ps how to show them to you.

Also, teach ps how to show the names for all the uids, the rest of the
group numbers, and the "group access list".

Add hw.physpages and hw.userpages, which return the physmem and usermem
values as a u_quad (page count).  Necessary for reporting memory on systems
with >=4G.  Per disussion on wasabisystems.com!bsd-api-discuss.

Add a kern.dump_on_panic sysctl variable (and documentation, and a
kernel config option) that controls whether the kernel dumps to the
dump device on panic.  Dumps can still be forced via the ``sync''
command from ddb.  Defaults to ``on''.

Add sysconf(3) knobs for recent additions.

Merge the nathanw_sa branch.

Sync with HEAD.

On Darwin, mach_init is the system bootstrap process. It is responsible
for forking the traditional UNIX init(8) and it does the Mach port naming
service. We need mach_init for the naming service, but unfortunately, it
will only act as such if its PID is 1. We introduce a sysctl
(emul.darwin.init_pid) to fool a given process into thinking its PID is 1.
That way we can get mach_init into behaving as the name server.

Typical use:
/sbin/sysctl -w emul.darwin.init_pid=$$ ; exec /emul/darwin/sbin/mach_init

Add a sysconf(3) knob for {ATEXIT_MAX}.

Sync with HEAD.

Merge pcred and ucred, and poolify.  TBD: check backward compatibility
and factor-out some higher-level functionality.

Add kern.forkfsleep sysctl - set/get time (in miliseconds) for which
process would be forced to sleep in fork() if it hits either global
or user maxproc limit. Default is zero (no forced sleep).
Maximum is 20 seconds.

reserve sysctl number for kern.lwp, which is used on nathanw_sa branch

Sync with HEAD.

KERN_MAXID needs to be one more than the last sysctl. Spotted by simonb.

Add two sysctls: kern.labelsector and kern.labeloffset.
These are of use to userland code which previously depended on the
hard-coded values of LABELSECTOR and LABELOFFSET to figure out the
location of the disklabel for a particular platform.

With the introduction of umbrella ports such as evbarm, evbmips, etc,
the location of the disklabel may vary between kernels for the same
MACHINE. This sysctl will allow userland programs to remain independent
of the particular flavour of MACHINE in such cases.

Sync with HEAD.

Introduction of IRIX sysctl broke binary compatibility because I changed the
offset of the Linux entry. Fix this.

Catch up to -current

Added sysctl to change all IRIX kernel values reported by uname and systeminfo:
OS name, hw name, kernel version, and so forth.

Added two sysctl-able flags: proc.curproc.stopfork and proc.curproc.stopexec
that can be used to block a process after fork(2) or exec(2) calls. The
new process is created in the SSTOP state and is never scheduled for running.

This feature is designed so that it is esay to attach the process using gdb
before it has done anything.

It works also with sproc, kthread_create, clone...

sync kqueue branch with HEAD

catch up with -current.

Catch up to -current.

Get rid of sysctl for setting BCM2033 firmware path.  It doesn't work
for ports that don't include files.usb, and it's also not done quite
the way it should.

Fix signed/unsigned comparison warnings from GCC 3.3.

Add sysctl support for hw.dev.ubtbcmfw (so I can set the firmware
path for my BCM2033).

Catch up to -current.

catch up with -current.

No longer need to pull in lwp.h; proc.h pulls it in for us.

provide KERN_URND, which extracts sizeof(int) random number from the kernel
(similar to /dev/urandom, for use within chroot jail).

catch up with -current on kqueue branch

Add a field for the underlying process state, as distinct from the
state of the selected representative LWP.

Add a field to kinfo_lwp with the address of the LWP structure in kernel space.

Rearrange kinfo_lwp slightly to be more structure-alignment friendly.

Add a couple of LWP-related fields to the end of struct kinfo_proc2.
Define a new struct kinfo_lwp.

Catch up to -current.
(CVS: It's not just a program. It's an adventure!)

new emulation specific sysctls.

Convert sysctl_memlock to an adaptive mutex.

Catch up to -current.

Sync w/ -current.

Add {POSIX_MONOTONIC_CLOCK} variables.

Add sysctls to read tk_{nin,nout,cancc,rawcc} (under a kern.tkstat node).
"extern" those variables in <sys/dkstat.h>, and add declarations for them
in sys/tty.c

Implement the hw.disknames and hw.diskstats sysctl's that have been listed
in <sys/sysctl.h> since day one but never implemented.

Catch up to -current.

Catch up with -current. Fix some bogons in the sparc64 kbd/ms
attach code. cd18xx conversion provided by mrg.

Remove the property sysctl interface for now.

Fix a typo so that /sbin/sysctl compiles again.

Add sysctl for generic properties.

Catch up with -current.

update to -current

Add a sysctl to frob sb_max.

Add support for kern.maxphys, vm.maxslp, vm.uspace (the later two for ps).

De-__P kernel prototypes.

Move CTL_PIPE_NAMES and KERN_PIPE_* from <sys/sysctl.h> to <sys/pipe.h>

Catch up to -current.

Move prototype of sysctl_dopipe() from <sys/sysctl.h> to <sys/pipe.h>
and adjust kern/kern_sysctl.c accordingly.

Add port of high performance pipe implementation written by John S. Dyson
for FreeBSD project. Besides huge speed boost compared with socketpair-based
pipes, this implementation also uses pagable kernel memory instead of mbufs.

Significant differences to FreeBSD version:
* uses uvm_loan() facility for direct write
* async/SIGIO handling correct also for sync writer, async reader
* limits settable via sysctl, amountpipekva and nbigpipes available via sysctl
* pipes are unidirectional - this is enforced on file descriptor level
	for now only, the code would be updated to take advantage of it
	eventually
* uses lockmgr(9)-based locks instead of home brew variant
* scatter-gather write is handled correctly for direct write case, data
  is transferred by PIPE_DIRECT_CHUNK bytes maximum, to avoid running out of kva

All FreeBSD/NetBSD specific code is within appropriate #ifdef, in preparation
to feed changes back to FreeBSD tree.

This pipe implementation is optional for now, add 'options NEW_PIPE'
to your kernel config to use it.

Fix current KERN_MAXID - it was one too many.

Initial commit of scheduler activations and lightweight process support.

Sync with head (for UBC+NFS fixes, mostly).

Add 'vendor' toplevel name. To be used as vendor.<vendorname>.* for
vendor-specific data.

Sync with HEAD.

Update thorpej_scsipi to -current as of a month ago

Add a sysctl_rdminstruct() function - same as sysctl_rdstruct() but
can return short data if *oldlenp is less than len.