- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r290615: Introduce portal group options in ctl.conf.

While CTL has concept of port options, used at least for iSCSI ports now,
before this change it was impossible to set them manually. There still
no user-configurable port options now, but I am planning to change that.

MFC r288310: Add to CTL initial support for CDROMs and removable devices.

Relnotes: yes

MFC r288259: Remove some duplicate, legacy, dead and questionable code.

MFC r288061: Make cltd ignore HA ports.

MFC r287823: Add ctl-lun config option for consistency in HA setups.

MFC r287757: When updating port, apply only change of LUN map, not whole.

MFC r287500: Allow LUN options modification via CTL_LUNREQ_MODIFY.

Not all changes take effect, but that is a different question.

MFC r287455, r287458, r287459: Remove some dead code.

MFC r286806: Drop "internal" CTL frontend.

Its idea was to be a simple initiator and execute several commands from
kernel level, but FreeBSD never had consumer for that functionality,
while its implementation polluted many unrelated places.

MFC r284765, r284875:
Teach ctld about CTL's physical_port and virtual_port fields.

This allows ctld to work with isp(4) virtual ports, specifying them as
isp0/1, isp0/2, etc. There are still problems on isp(4) layer with
disabling those ports after enabling, but hopefully they can be fixed.

Merge an applicable subset of r263234 from HEAD to stable/10:

Update most userspace consumers of capability.h to use capsicum.h instead.

auditdistd is not updated as I will make the change upstream and then do a
vendor import sometime in the next week or two.

Note that a significant fraction does not apply, as FreeBSD 10 doesn't
contain a Capsicumised ping, casperd, libcasper, etc. When these features
are merged, the capsicum.h change will need to be merged with them.

Sponsored by: Google, Inc.

MFC r279590: If target name starts with "naa.", set it as WWNN for CTL port.

MFC r279276: Add checks for malloc() failures.

Submitted by: Dmitry Luhtionov <dmitryluhtionov@gmail.com>

MFC r278354: Teach ctld(8) to control non-iSCSI CTL ports.

This change introduces new target option "port", that assigns current target
to specified CTL port. On config application ctld(8) will apply LUN mapping
according to target configuration to specified port and bring the port up.
On shutdown cltd(8) will remove the mapping and put the port down.

This change allows to configure both iSCSI and FibreChannel targets in the
same configuration file in alike way.

Kernel side support was added earlier at r278037.

Relnotes: yes
Sponsored by: iXsystems, Inc.

MFC r278322: Add support for multiple portal groups per target.

This change allows multiple "portal-group" options to be specified per
target. Each of them may include new optional auth-group name parameter
to override per-target auth parameters for specific portal group.

Kernel side support was added earlier at r278161.

Sponsored by: iXsystems, Inc.

MFC r278161: Bring some more order into iSCSI portal group tags support.

While ctld(8) still does not allow multiple portal groups per target
to be configured, kernel should now be able to handle it.

Sponsored by: iXsystems, Inc.

MFC r278037: CTL LUN mapping rewrite.

Replace iSCSI-specific LUN mapping mechanism with new one, working for any
ports. By default all ports are created without LUN mapping, exposing all
CTL LUNs as before. But, if needed, LUN mapping can be manually set on
per-port basis via ctladm. For its iSCSI ports ctld does it via ioctl(2).
The next step will be to teach ctld to work with FibreChannel ports also.

Respecting additional flexibility of the new mechanism, ctl.conf now allows
alternative syntax for LUN definition. LUNs can now be defined in global
context, and then referenced from targets by unique name, as needed. It
allows same LUN to be exposed several times via multiple targets.

While there, increase limit for LUNs per target in ctld from 256 to 1024.
Some initiators do not support LUNs above 255, but that is not our problem.

Relnotes: yes
Sponsored by: iXsystems, Inc.

MFC r273464:

Whitespace fixes.

Sponsored by: The FreeBSD Foundation

MFC r272911:
Make ctld start even if some LUNs are unable to open backing storage.

Such LUNs will be visible to initiators, but return "not ready" status
on media access commands. If backing storage become available later,
`ctladm modify ...` or `service ctld reload` can trigger its reopen.

MFC r270279:

Make the iSCSI stack use __FBSDID() properly.

Sponsored by: The FreeBSD Foundation

MFC r268795:
Fix ctld crash on startup if target alias is not set.

MFC r268328:
Close race in r268291 between port destruction, delayed by sessions
teardown, and new port creation during `service ctld restart`.

Close it by returning iSCSI port internal state, that allows to identify
dying ports, which should not be counted as existing, from really alive.

MFC r268302:
Pass through iSCSI session ISID from LOGIN request to the CTL frontend.

ISID is an important part of initiator transport ID for iSCSI. It is not
used now, but should be to properly implement persistent reservation.

MFC r268293:
Burry devid port method, which was a gross hack.

Instead make ports provide wanted port and target IDs, and LUNs provide
wanted LUN IDs. After that core Device ID VPD code only had to link all
of them together and add relative port and port group numbers.

LUN ID for iSCSI LUNs no longer created by CTL, but by ctld, and passed
to CTL as "scsiname" LUN option. This makes LUNs to report the same set
of IDs, independently from the port through which it is accessed, as
required by SCSI specifications.

MFC r268291:
Create separate CTL port for every iSCSI target (and maybe portal group).

Having single port for all iSCSI connections makes problematic implementing
some more advanced SCSI functionality in CTL, that require proper ports
enumeration and identification.

This change extends CTL iSCSI API, making ctld daemon to control list of
iSCSI ports in CTL. When new target is defined in config fine, ctld will
create respective port in CTL. When target is removed -- port will be
also removed after all active commands through that port properly aborted.
This change require ctld to be rebuilt to match the kernel.

As a minor side effect, this allows to have iSCSI targets without LUNs.
While that may look odd and not very useful, that is not incorrect.

MFC r267648:
serial_num and device_id fields are not necessarily null-terminated.

Before this it was impossible to use all 16 bytes of serial number, and
client always got serial number NULL-terminated, that is not required.

MFC r264530:

Properly pass the initiator address when running in proxy mode.

Sponsored by: The FreeBSD Foundation

MFC r264526:

Properly identify target portal when running in proxy mode. While here,
remove CTL_ISCSI_CLOSE, it wasn't used or implemented anyway.

Sponsored by: The FreeBSD Foundation

MFC r264524:

Make it possible for the iSCSI target side to operate in both normal
and ICL_KERNEL_PROXY mode, and fix some bit rot so the latter actually
works again.

Sponsored by: The FreeBSD Foundation

MFC r261757:

Rename a variable, no functional changes.

Sponsored by: The FreeBSD Foundation

MFC r261765:

Improve error reporting.

Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Fix off-by-one.

Coverity CID: 1011375
Approved by: re (glebius)
Sponsored by: FreeBSD Foundation

Fix several problems in the new iSCSI stack; this includes interoperability
fix for LIO (Linux target), removing possibility for the target to avoid mutual
CHAP by choosing to skip authentication altogether, and fixing truncated error
messages in iscsictl(8) output. This also fixes several of the problems found
with Coverity.

Note that this change requires world rebuild.

Coverity CID: 1088038, 1087998, 1087990, 1088004, 1088044, 1088041, 1088040
Approved by: re (blanket)
Sponsored by: FreeBSD Foundation

Make iscsictl(8) automatically try to load the iscsi module. While here,
improve module loading in iscsid(8) and ctld(8).

Approved by: re (delphij)

Bring in the new iSCSI target and initiator.

Reviewed by: ken (parts)
Approved by: re (delphij)
Sponsored by: FreeBSD Foundation