Add more formal and strict command parsing and validation.

For every supported command define CDB length and mask of bits that are
allowed to be set.  This allows to remove bunch of checks through the code
and still make the validation more strict.  To properly do it for commands
supporting multiple service actions, formalize their parsing by adding
subtables for each of such commands.

As visible effect, this change allows to add support for REPORT SUPPORTED
OPERATION CODES command, reporting to client all the data about supported
SCSI commands, except timeouts.

MFC after:	2 weeks
Revert r268007, and re-adapt MFV r260708:

4427 pid provider rejects probes with valid UTF-8 names

Use of u8_textprep.c required -Wno-cast-qual for powerpc.

MFC after:	2 weeks
Add support for REPORT TIMESTAMP command.

MFC after:	2 weeks
Remove old reference to IP_RSSCPUID.

Submitted by:	Eggert, Lars <lars@netapp.com>
Free the static DMA buffer holding the command ring during detach as well
as if attach fails.
Merge r267837 from ^/projects/release-debugdist:
  When building world when WITH_DEBUG_FILES is set,
  avoid building ar(1) archives with '-g'.

Tested on:	head@r267801
Reviewed by:	emaste, imp
Sponsored by:	The FreeBSD Foundation
Merge ^/projects/release-debugdist into ^/head:
r262491, r262493, r262516, r267345, r267397:

r262491:
  Add DEBUG_DISTRIBUTIONS, and set it to include base and
  EXTRA_DISTRIBUTIONS, excluding 'doc', since the documentation
  distribution does not have corresponding debug information.

  Use DEBUG_DISTRIBUTIONS in the 'distributeworld installworld'
  and 'packageworld' targets, to reduce the number of occurances
  of excluding distributions that do not have .debug files.

r262493:
  In release/Makefile, explicitly set WITHOUT_DEBUG_FILES=1
  for dvdrom and cdrom targets.  (Later reverted.)

  Exclude the *.debug.txz distributions from dvdrom and
  cdrom images, but include them for ftp distribution.

r262516:
  Rename ${dist}.debug.txz to ${dist}-dbg.txz to prevent the
  following output:
	eval: ${base....}: Bad substitution
	eval: ${doc....}: Bad substitution
	eval: ${games....}: Bad substitution
	eval: ${lib32....}: Bad substitution

  This also follows other naming conventions seen in the
  wild.

r267345:
  Explicitly set MK_DEBUG_FILES=no, which overrides the
  WITH_DEBUG_FILES=1 and WITHOUT_DEBUG_FILES=1 collisions
  previously experienced.

  This change allows us to create the {base,kernel}_debug.txz
  distributions without accidentally installing the *.debug
  files on the medium itself.

r267397:
  Remove evaluations of MK_DEBUG_FILES where not needed.
  If DEBUG_DISTRIBUTIONS is empty, which is true if
  MK_DEBUG_FILES evaluates to 'no' above, the loop does
  nothing.

MFC after:	1 month
Tested on:	head@r267801
Reviewed by:	brooks [1], emaste, imp [1]
		[1] earlier version
Sponsored by:	The FreeBSD Foundation
Convert bge(4) to use the driver API.

Submitted by:   Sreekanth Rupavatharam <rupavath@juniper.net>
Obtained from:  Juniper Networks, Inc.
Change NFS readdir() to only ignore cookies preceding the given offset for
UFS rather than for all but ZFS.  This code was assuming that offsets were
monotonically increasing for all file systems except ZFS and that the
cookies from a previous call may have been rewound to a block boundary.
According to mckusick@ only UFS is known to do this, so only requests against
UFS file systems should remove cookies smaller than the given offset.  This
fixes serving TMPFS over NFS as it too does not have monotonically increasing
offsets.  The comment around the code also indicated it was specific to UFS.

Some of the code using 'not_zfs' is specific to ZFS snapshot handling, so
add a 'is_zfs' variable for those cases.

It's possible that 'is_zfs' check for VFS_VGET() support may not be
specific to ZFS.  This needs more research and testing.

After this fix TMPFS and other file systems can be served over NFS.

To test I compared the results of syncing a /usr/src tree into a tmpfs and
serving that over NFS.  Before the fix 3589 files were missing on the remote
view.  After the fix all files were successfully found.

Reviewed by:	rmacklem
Discussed with:	mckusick, rmacklem via fs@
Discussed at:	http://lists.freebsd.org/pipermail/freebsd-fs/2014-April/019264.html
MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division
Merge the NFSv4.1 server code in projects/nfsv4.1-server over
into head. The code is not believed to have any effect
on the semantics of non-NFSv4.1 server behaviour.
It is a rather large merge, but I am hoping that there will
not be any regressions for the NFS server.

MFC after:	1 month
 - Fix handling of "new" style of ioctl in compatiblity mode [1];
 - Reorganize code and reduce diff from upstream;
 - Improve forward compatibility shims for previous kernel;

Reported by:	sbruno [1]
X-MFC-With:	r268075
Document r268045, vt(4) now in GENERIC.
Remove r260888, VT kernel configuration file is gone.

Sponsored by:	The FreeBSD Foundation
Bump __FreeBSD_version since r268115 changed the internal
interfaces used between the NFS related modules, including
the krpc.
MFV r268119:

4914 zfs on-disk bookmark structure should be named *_phys_t

illumos/illumos-gate@7802d7bf98dec568dadf72286893b1fe5abd8602

MFC after:	2 weeks
Small merges from OpenSolaris:

These have no effect on FreeBSD, in fact they are ifdef'ed,
but make easier future merges:

6699767 panic in spec_open()

6718877 crgetzoneid() use can cause problems when forking processes with
USDT providers in a non global zone

MFC after:	3 days
MFV r268121:

4924 LZ4 Compression for metadata

illumos/illumos-gate@b8289d24d866c1af02d7007348f7f057693c15d3

MFC after:	2 weeks
Add an entry for r268115 to UPDATING.
MFV r268122:

4929 want prevsnap property

illumos/illumos-gate@b461c7460e5e77cf65f00151162e654220c6e2fb

MFC after:	2 weeks
Check if fchflags() is needed by fstat'ing before and check
the results.

Reviewed by:	jilles
X-MFC-With:	r267977
Merge from OpenSolaris (15-Sep-2008):

6735480 race between probe enabling and provider registration

MFC after:	1 week