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)

Use sysctl to fetch stats from the kernel instead of reading variables
directly via libkvm.

PR: kern/122875, bin/123014
Tested by: Danny Braniss danny cs.huji.ac.il
MFC after: 1 week

Add the variable's type to the declaration.

Run a revision of the devstat interface:

Kernel:

Change statistics to use the *uptime() timescale (ie: relative to
boottime) rather than the UTC aligned timescale. This makes the
device statistics code oblivious to clock steps.

Change timestamps to bintime format, they are cheaper.

Remove the "busy_count", and replace it with two counter fields:
"start_count" and "end_count", which are updated in the down and
up paths respectively. This removes the locking constraint on
devstat.

Add a timestamp argument to devstat_start_transaction(), this will
normally be a timestamp set by the *_bio() function in bp->bio_t0.
Use this field to calculate duration of I/O operations.

Add two timestamp arguments to devstat_end_transaction(), one is
the current time, a NULL pointer means "take timestamp yourself",
the other is the timestamp of when this transaction started (see
above).

Change calculation of busy_time to operate on "the salami principle":
Only when we are idle, which we can determine by the start+end
counts being identical, do we update the "busy_from" field in the
down path. In the up path we accumulate the timeslice in busy_time
and update busy_from.

Change the byte_* and num_* fields into two arrays: bytes[] and
operations[].

Userland:

Change the misleading "busy_time" name to be called "snap_time" and
make the time long double since that is what most users need anyway,
fill it using clock_gettime(CLOCK_MONOTONIC) to put it on the same
timescale as the kernel fields.

Change devstat_compute_etime() to operate on struct bintime.

Remove the version 2 legacy interface: the change to bintime makes
compatibility far too expensive.

Fix a bug in systat's "vm" page where boot relative busy times would
be bogus.

Bump __FreeBSD_version to 500107

Review & Collaboration by: ken

Update to current devstat API.

Add #include <sys/resource.h>

Remove <sys/dkstat.h> #include

Rename local function havedisk() to haveadisk() to avoid conflict a
with another function by the same name in a system header.

Include <nlist.h> for nlist interfaces instead of depending on namespace
pollution in <kvm.h>.

Spell void * as void * rather than caddr_t. This is complicated by the
fact that caddr_t is often misspelled as char *.

Sponsored by: DARPA, NAI Labs

o __P removal
o use new style prototypes and function definitions
o signal handlers need an argument. Mark it unused.

The interface index space may be sparsely populated (e.g. when an
interface in the middle is if_detach()'d). Return (and handle)
ENOENT when the ifmib(4) is accessed for a nonexistent interface.

MFC after: 14 days

Fixes file descriptor leak in standalone mode.
Prevents simultaneous calls to updatestat() as function is not reentrant.

PR: bin/24857
Submitted by: Martin Butkus <mb@bagheera.thgwf.de>
MFC after: 1 month

$Id$ -> $FreeBSD$

Fix a memory leak in rpc.rstatd that shows up when it's run in standalone
mode. (i.e., not from inetd)

PR: bin/8212

Work around an alpha compiler bug.

Reviewed by: Kenneth D. Merry <ken@plutotech.com>

Update system to new device statistics code.

Submitted by: "Kenneth D. Merry" <ken@plutotech.com>
mike@smith.net.au (Mike Smith)

Make these programs compile and work correctly now that /usr/include/rpcsvc
has been ANSI-fied.

Pointed out by: bde

Remove unused #include. Display if inetd started us in case of failure.

Remove \n at end of syslog string. -Wall cleaning. Cosmetics in man page.

Revert $FreeBSD$ to $Id$

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.

Update to match changes in <net/if.h>.

Convert this program to use sysctl rather than kvm for some of its
statistics. Unfortunately, the coverage of sysctl isn't good enough to do
all of them :-( .

Remove trailing whitespace.

Updated to changes in struct vmmeter. There is a slight bogosity here:
"pageins/outs" now refers to vnode paging.

This commit was generated by cvs2svn to compensate for changes in r2334,
which included commits to RCS files with non-trunk default branches.

rstatd -- from FreeBSD-1.1.5.1, with changes for 4.4-Lite kvm interface.
Original rstatd by John Brezak
Submitted by: Geoff.