libk{core,info}: The kern.ccpu sysctl is gone, so remove *get_sched_ccpu().

Interestingly, kcore_get_sched_ccpu() seems to never have returned ccpu,
but instead tk_nin, which is not related.

kernel - Upgrade buffer space tracking variables from int to long

* Several bufspace-related buffer cache parameters can now overflow a
32 bit integer on machines with large amounts (~64G+) of mem

kernel - Upgrade buffer space tracking variables from int to long

* Several bufspace-related buffer cache parameters can now overflow a
32 bit integer on machines with large amounts (~64G+) of memory.
Change these to long.

bufspace, maxbufspace, maxbufmallocspace, lobufspace, hibufspace,
lorunningspace, hirunningspace, dirtybufspace,
dirtybufspacehw, runningbufspace, lodirtybufspace, hidirtybufspace.

* Also requires an API change to libkcore/libkinfo which effects top.

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Networking routing statistics on a per-CPU basis:

(a) sysctl node net.route introduced.

(b) sysctl leaf node net.route.stats can be used for retrieving
a cpu indexed array of struct rtstatis

Networking routing statistics on a per-CPU basis:

(a) sysctl node net.route introduced.

(b) sysctl leaf node net.route.stats can be used for retrieving
a cpu indexed array of struct rtstatistics.

(a) add a function kinfo_get_net_rtstatistics(3), which will be
responsible for providing an aggregated view of the routing
statistics; part of libkinfo(3).

(d) adapt netstat(8) to make use of the new libkinfo interface
for retrieving routing statistics.

Discussed-with: Jeffrey Hsu <hsu at dragonflybsd.org> (long time ago)

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Add some useful comments to interface functions; required a little bit of
re-arrangement.

KINFO library cleanups:

(a) stop including <sys/param.h> from kinfo_pcpu.h and kinfo.h

(b) remove useless include guards

(c) use _DIAGASSERT for enforcing interface requirements

(d) substitut

KINFO library cleanups:

(a) stop including <sys/param.h> from kinfo_pcpu.h and kinfo.h

(b) remove useless include guards

(c) use _DIAGASSERT for enforcing interface requirements

(d) substitute use of relloc(3) with reallocf(3) to guard from
memory leaks.

Requested-by: Joerg Sonnenberger <joerg@britannica.bec.de>

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Adapt the KINFO library to aggregate per-cpu cputime statistics.

(a) add a framework for aggregating per-cpu structures, of variant
field types; this interface will undergo change once it is

Adapt the KINFO library to aggregate per-cpu cputime statistics.

(a) add a framework for aggregating per-cpu structures, of variant
field types; this interface will undergo change once it is
formalised upon, kinfo_pcpu.[ch].

(b) minor style(9) cleanups while I am around these ends.

(c) adjust libkcore, this might not be fully correct but it fetches
the right symbol at the least, it is not so easy to collect
per-cpu statistics from core files without doing magic with the
CPU privatespace like how we do in GDB debug scripts.

(d) kinfo_get_sched_cputime(3) is fetching aggregate statistics to
retain behavior, most programs do not care about per-cpu stats
without getting really mucky anyway; (discussed with joerg)

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Add new structures for exporting the cputime statistics via 64 bit counters
and redo the timer frequence export.
Provide the interface glue for libkinfo and libkcore.
Additionally provide interfaces

Add new structures for exporting the cputime statistics via 64 bit counters
and redo the timer frequence export.
Provide the interface glue for libkinfo and libkcore.
Additionally provide interfaces to query ccpu, the number of cpus, tk_nin
and tk_nout.
Remove those fields from devstat.h's struct statinfo.
Remove kvm dependency of rpc.rstatd by using the newly added libkinfo
functions and the sysctl interface for vmmeter.
Use the new interface in systat, the iostat part is now kvm-free.
Use kinfo_get_sched_stathz in time.
Use the kinfo interface for everything beside getting the actual process list
in top. This also removes the Last PID, which could be added back easily.
Since the feature is not that useful and breaks e.g. the jail isolation,
I haven't added a sysctl to read nextpid.
Use the kinfo interface in vmstat.
Use the kinfo interface in iostat. iostat is now kvm-free and not
setgid kmem anymore. This also means that iostat can't be applied to
coredump anymore. If this functionality is important, the kcore kinfo wrapper
can be added easily.

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Add the basic of libkcore. Switch pstat to use kcore/kinfo backing,
defaulting to kcore for now.

Add kinfo_get_vfs_bufspace(). Remove some junk from Makefile.

Add a new system library, libkinfo. It is intended to replace libkvm for
most userland tools, which want to deal with a living kernel, not
post-mortem analysation.

Change the kern.file backing from

Add a new system library, libkinfo. It is intended to replace libkvm for
most userland tools, which want to deal with a living kernel, not
post-mortem analysation.

Change the kern.file backing from a struct file array to a struct kinfo_file
array. The later is an independent structure, which includes the information
useful for userland. This allows changing the kernel-internals without
having to recompile libkinfo and derived programs. This is inspired by the
changes DES did in FreeBSD 5 (struct xfile).

Partly-obtained-from: FreeBSD (kern_descrip.c changes)

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