Compile fixes:

Remove duplicate "debug_ktr.mask" sysctl definition.
Remove now unused variable from "kern_ktr.c".
This fixes build of "ktr" which was broken by r267961.

Let the default value for "v

Compile fixes:

Remove duplicate "debug_ktr.mask" sysctl definition.
Remove now unused variable from "kern_ktr.c".
This fixes build of "ktr" which was broken by r267961.

Let the default value for "vm_kmem_size_scale" be zero. It is setup
after that the sysctl has been initialized from "getenv()" in the
"kmeminit()" function to equal the "VM_KMEM_SIZE_MAX" value, if
zero. On Sparc64 the "VM_KMEM_SIZE_MAX" macro is not a constant. This
fixes build of Sparc64 which was broken by r267961.

Add a special macro to dynamically create SYSCTL root nodes, because
root nodes have a special parent. This fixes build of existing OFED
module and CANBUS module for pc98 which was broken by r267961.

Add missing "sysctl.h" includes to get the needed sysctl header file
declarations. This is needed after r267961.

MFC after: 2 weeks

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Pull in r267961 and r267973 again. Fix for issues reported will follow.

Revert r267961, r267973:

These changes prevent sysctl(8) from returning proper output,
such as:

1) no output from sysctl(8)
2) erroneously returning ENOMEM with tools like truss(1)
or uname(1

Revert r267961, r267973:

These changes prevent sysctl(8) from returning proper output,
such as:

1) no output from sysctl(8)
2) erroneously returning ENOMEM with tools like truss(1)
or uname(1)
truss: can not get etype: Cannot allocate memory

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Extend the meaning of the CTLFLAG_TUN flag to automatically check if
there is an environment variable which shall initialize the SYSCTL
during early boot. This works for all SYSCTL types both statica

Extend the meaning of the CTLFLAG_TUN flag to automatically check if
there is an environment variable which shall initialize the SYSCTL
during early boot. This works for all SYSCTL types both statically and
dynamically created ones, except for the SYSCTL NODE type and SYSCTLs
which belong to VNETs. A new flag, CTLFLAG_NOFETCH, has been added to
be used in the case a tunable sysctl has a custom initialisation
function allowing the sysctl to still be marked as a tunable. The
kernel SYSCTL API is mostly the same, with a few exceptions for some
special operations like iterating childrens of a static/extern SYSCTL
node. This operation should probably be made into a factored out
common macro, hence some device drivers use this. The reason for
changing the SYSCTL API was the need for a SYSCTL parent OID pointer
and not only the SYSCTL parent OID list pointer in order to quickly
generate the sysctl path. The motivation behind this patch is to avoid
parameter loading cludges inside the OFED driver subsystem. Instead of
adding special code to the OFED driver subsystem to post-load tunables
into dynamically created sysctls, we generalize this in the kernel.

Other changes:
- Corrected a possibly incorrect sysctl name from "hw.cbb.intr_mask"
to "hw.pcic.intr_mask".
- Removed redundant TUNABLE statements throughout the kernel.
- Some minor code rewrites in connection to removing not needed
TUNABLE statements.
- Added a missing SYSCTL_DECL().
- Wrapped two very long lines.
- Avoid malloc()/free() inside sysctl string handling, in case it is
called to initialize a sysctl from a tunable, hence malloc()/free() is
not ready when sysctls from the sysctl dataset are registered.
- Bumped FreeBSD version to indicate SYSCTL API change.

MFC after: 2 weeks
Sponsored by: Mellanox Technologies

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Initialize sysctl OID structure by record.

MFC after: 2 weeks

Remove more constants related to static sysctl nodes. The MAXID constants
were primarily used to size the sysctl name list macros that were removed
in r254295. A few other constants either did not

Remove more constants related to static sysctl nodes. The MAXID constants
were primarily used to size the sysctl name list macros that were removed
in r254295. A few other constants either did not have an associated
sysctl node, or the associated node used OID_AUTO instead.

PR: ports/184525 (exp-run)

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sysctl_handle_counter_u64() doesn't use arg2 argument, thus simplify
the SYSCTL_COUNTER_U64() macro.

Sponsored by: Nginx, Inc.

Provide macros that allow easily export uma(9) zone limits and
current usage via sysctl(9):

SYSCTL_UMA_MAX()
SYSCTL_ADD_UMA_MAX()
SYSCTL_UMA_CUR()
SYSCTL_ADD_UMA_CUR()

Sponsored by: Nginx,

Provide macros that allow easily export uma(9) zone limits and
current usage via sysctl(9):

SYSCTL_UMA_MAX()
SYSCTL_ADD_UMA_MAX()
SYSCTL_UMA_CUR()
SYSCTL_ADD_UMA_CUR()

Sponsored by: Nginx, Inc.

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Add an kinfo sysctl to retrieve signal trampoline location for the
given process.

Note that the correctness of the trampoline length returned for ABIs
which do not use shared page depends on the cor

Add an kinfo sysctl to retrieve signal trampoline location for the
given process.

Note that the correctness of the trampoline length returned for ABIs
which do not use shared page depends on the correctness of the struct
sysvec sv_szsigcodebase member, which will be fixed on as-need basis.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week

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Fix a typo.

Approved by: re (gjb)

Style cleanups.

Remove most of the remaining sysctl name list macros. They were only
ever intended for use in sysctl(8) and it has not used them for many
years.

Reviewed by: bde
Tested by: exp-run by bdrewery

Merge from projects/counters: counter(9).

Introduce counter(9) API, that implements fast and raceless counters,
provided (but not limited to) for gathering of statistical data.

See http://lists.f

Merge from projects/counters: counter(9).

Introduce counter(9) API, that implements fast and raceless counters,
provided (but not limited to) for gathering of statistical data.

See http://lists.freebsd.org/pipermail/freebsd-arch/2013-April/014204.html
for more details.

In collaboration with: kib
Reviewed by: luigi
Tested by: ae, ray
Sponsored by: Nginx, Inc.

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Similar to CTLFLAG_RDTUN, provide CTLFLAG_RWTUN that defines writable sysctl
that can also be modified by loader tunable.

Add CTLFLAG_STATS to sysctl flags

In preparation for sysctl(8) growing the ability to only print
out boot/run-time tunables we need a way to differentiate between
RW sysctl nodes that tune a particu

Add CTLFLAG_STATS to sysctl flags

In preparation for sysctl(8) growing the ability to only print
out boot/run-time tunables we need a way to differentiate between
RW sysctl nodes that tune a particular thing, or simply export
a stat that we want to allow the sysadmin to reset to 0 (or some
other value).

To do so, we add the CTLFLAG_STATS which should be OR'd into the
CTLFLAGs when exporting a "writable/resettable" statistic node via
sysctl.

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Add a sysctl to set and retrieve binary osreldate of another process.

Suggested by: kib
Reviewed by: kib
MFC after: 2 weeks

o) Add COMPAT_FREEBSD32 support for MIPS kernels using the n64 ABI with userlands
using the o32 ABI. This mostly follows nwhitehorn's lead in implementing
COMPAT_FREEBSD32 on powerpc64.
o) Add

o) Add COMPAT_FREEBSD32 support for MIPS kernels using the n64 ABI with userlands
using the o32 ABI. This mostly follows nwhitehorn's lead in implementing
COMPAT_FREEBSD32 on powerpc64.
o) Add a new type to the freebsd32 compat layer, time32_t, which is time_t in the
32-bit ABI being used. Since the MIPS port is relatively-new, even the 32-bit
ABIs use a 64-bit time_t.
o) Because time{spec,val}32 has the same size and layout as time{spec,val} on MIPS
with 32-bit compatibility, then, disable some code which assumes otherwise
wrongly when built for MIPS. A more general macro to check in this case would
seem like a good idea eventually. If someone adds support for using n32
userland with n64 kernels on MIPS, then they will have to add a variety of
flags related to each piece of the ABI that can vary. That's probably the
right time to generalize further.
o) Add MIPS to the list of architectures which use PAD64_REQUIRED in the
freebsd32 compat code. Probably this should be generalized at some point.

Reviewed by: gonzo

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Add sysctl to retrieve or set umask of another process.

Submitted by: Dmitry Banschikov <me ubique spb ru>
Discussed with: kib, rwatson
Reviewed by: kib
MFC after: 2 weeks

This should have been committed in r228030.

MFC after: 2 weeks

Add sysctl to get process resource limits.

Reviewed by: kib
MFC after: 2 weeks

Add new sysctls, KERN_PROC_ENV and KERN_PROC_AUXV, to return
environment strings and ELF auxiliary vectors from a process stack.

Make sysctl_kern_proc_args to read not cached arguments from the
proc

Add new sysctls, KERN_PROC_ENV and KERN_PROC_AUXV, to return
environment strings and ELF auxiliary vectors from a process stack.

Make sysctl_kern_proc_args to read not cached arguments from the
process stack.

Export proc_getargv() and proc_getenvv() so they can be reused by
procfs and linprocfs.

Suggested by: kib
Reviewed by: kib
Discussed with: kib, rwatson, jilles
Tested by: pho
MFC after: 2 weeks

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Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which
may be jointly referenced via the mask CTLFLAG_CAPRW. Sysctls with these
flags are available in Capsicum's capability mode; o

Define two new sysctl node flags: CTLFLAG_CAPRD and CTLFLAG_CAPRW, which
may be jointly referenced via the mask CTLFLAG_CAPRW. Sysctls with these
flags are available in Capsicum's capability mode; other sysctl nodes are
not.

Flag several useful sysctls as available in capability mode, such as memory
layout sysctls required by the run-time linker and malloc(3). Also expose
access to randomness and available kernel features.

A few sysctls are enabled to support name->MIB conversion; these may leak
information to capability mode by virtue of providing resolution on names
not flagged for access in capability mode. This is, generally, not a huge
problem, but might be something to resolve in the future. Flag these cases
with XXX comments.

Submitted by: jonathan
Sponsored by: Google, Inc.

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- Merge changes to the base system to support OFED. These include
a wider arg2 for sysctl, updates to vlan code, IFT_INFINIBAND,
and other miscellaneous small features.

Remove the CTLFLAG_NOLOCK as it seems to be both unused and
unfunctional. Wiring the user buffer has only been done explicitly
since r101422.

Mark the kern.disks sysctl as MPSAFE since it is and it

Remove the CTLFLAG_NOLOCK as it seems to be both unused and
unfunctional. Wiring the user buffer has only been done explicitly
since r101422.

Mark the kern.disks sysctl as MPSAFE since it is and it seems to have
been mis-using the NOLOCK flag.

Partially break the KPI (but not the KBI) for the sysctl_req 'lock'
field since this member should be private and the "REQ_LOCKED" state
seems meaningless now.

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Introduce signed and unsigned version of CTLTYPE_QUAD, renaming
existing uses. Rename sysctl_handle_quad() to sysctl_handle_64().