Merge ^/head r287680 through r287877.

Check for obsolete NUL bin in CSCD descriptor.

Improve XCOPY error reporting.

Finish merging from head, messed up in previous attempt

Merge from head

Merge ^/head r287527 through r287679.

Reimplement CTL High Availability.

CTL HA functionality was originally implemented by Copan many years ago,
but large part of the sources was never published. This change includes
clean room implem

Reimplement CTL High Availability.

CTL HA functionality was originally implemented by Copan many years ago,
but large part of the sources was never published. This change includes
clean room implementation of the missing code and fixes for many bugs.

This code supports dual-node HA with ALUA in four modes:
- Active/Unavailable without interlink between nodes;
- Active/Standby with second node handling only basic LUN discovery and
reservation, synchronizing with the first node through the interlink;
- Active/Active with both nodes processing commands and accessing the
backing storage, synchronizing with the first node through the interlink;
- Active/Active with second node working as proxy, transfering all
commands to the first node for execution through the interlink.

Unlike original Copan's implementation, depending on specific hardware,
this code uses simple custom TCP-based protocol for interlink. It has
no authentication, so it should never be enabled on public interfaces.

The code may still need some polishing, but generally it is functional.

Relnotes: yes
Sponsored by: iXsystems, Inc.

show more ...

Remove unused target and initiator IDs.

Merge r286744-r287584 from head.

Merge ^/head r286858 through r287489.

Make most of port methods optional and remove bunch of dummies.

Merge from HEAD

Merge ^/head r286697 through r286857.

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 po

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..

show more ...

Catch up with HEAD (r280229-r284686).

Merge ^/head r284188 through r284643.

Bring per-port LUN enable/disable code up to date:
- remove last remnants of never implemented multiple targets support;
- implement missing support for LUN mapping in this area.

Due to existing l

Bring per-port LUN enable/disable code up to date:
- remove last remnants of never implemented multiple targets support;
- implement missing support for LUN mapping in this area.

Due to existing locking constraints LUN mapping code is practically
unlocked at this point. Hopefully it is not racy enough to live until
somebody get idea how to call sleeping fronend methods under lock also
taken by the same frontend in non-sleepable context. :(

show more ...

Merge sync of head

Merge from head

Merge r278538 through r279514.

MFH: r278593-r278966

Sponsored by: The FreeBSD Foundation

Merge ^/head r278499 through r278755.

Make XCOPY and WUT commands respect physical block size/offset.

This change by 2-3 times improves performance of misaligned XCOPY and WUT
commands by avoiding unneeded read-modify-write cycles insid

Make XCOPY and WUT commands respect physical block size/offset.

This change by 2-3 times improves performance of misaligned XCOPY and WUT
commands by avoiding unneeded read-modify-write cycles inside ZFS.

MFC after: 1 week

show more ...

Merge from HEAD

Merge ^/head r278005 through r278109.