Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

MFC r271702:
Fix tpc_create_token() introduced in r269497 to encode CREATOR LOGICAL
UNIT DESCRIPTOR field as Identification Descriptor CSCD descriptor, not
just as Identification Descriptor.

Approved by: re (gjb)

MFC r270176:
Fix lock recursion on LUN shutdown, introduced on r269497.

MFC r269587:
Reimplement WRITE USING TOKEN with Block Zero token using WRITE SAME.

On my ZVOL of SSDs that increases speed of zero writing in that way from
1 to 2.5GB/s by reducing CPU overhead.

MFC r269497:
Add support for Windows dialect of EXTENDED COPY command, aka Microsoft ODX.

This allows to avoid extra network traffic when copying files on NTFS iSCSI
disks within one storage host by drag'n'dropping them in Windows Explorer
of Windows 8/2012. It should also accelerate Hyper-V VM operations, etc.

MFC r269444, r269450:
Plug EXTENDED COPY request data memory leak.

MFC r269442:
Fix some bugs in RECEIVE COPY STATUS data.

MFC r269441:
Add missing comparisons to make list IDs in EXTENDED COPY per-initiator,
as they should be. Wrap it into a function to not duplicate the code.

MFC r268808:
Increase maximal number of SCSI ports in CTL from 32 to 128.

After I gave each iSCSI target its own port, the old limit appeared to be
not so big. This change almost proportionally increases per-LUN memory
use, but it is still three times better then it was before r268807.

MFC r268767:
Add support for VMWare dialect of EXTENDED COPY command, aka VAAI Clone.

This allows to clone VMs and move them between LUNs inside one storage
host without generating extra network traffic to the initiator and back,
and without being limited by network bandwidth.

LUNs participating in copy operation should have UNIQUE NAA or EUI IDs set.
For LUNs without these IDs VMWare will use traditional copy operations.

Beware: the above LUN IDs explicitly set to values non-unique from the VM
cluster point of view may cause data corruption if wrong LUN is addressed!

Sponsored by: iXsystems, Inc.

Add support for VMWare dialect of EXTENDED COPY command, aka VAAI Clone.

This allows to clone VMs and move them between LUNs inside one storage
host without generating extra network traffic to the initiator and back,
and without being limited by network bandwidth.

LUNs participating in copy operation should have UNIQUE NAA or EUI IDs set.
For LUNs without these IDs VMWare will use traditional copy operations.

Beware: the above LUN IDs explicitly set to values non-unique from the VM
cluster point of view may cause data corruption if wrong LUN is addressed!

MFC after: 2 weeks
Sponsored by: iXsystems, Inc.