linux-next/block/partitions
Christoph Hellwig 7437bb73f0 block: remove support for the host aware zone model
When zones were first added the SCSI and ATA specs, two different
models were supported (in addition to the drive managed one that
is invisible to the host):

 - host managed where non-conventional zones there is strict requirement
   to write at the write pointer, or else an error is returned
 - host aware where a write point is maintained if writes always happen
   at it, otherwise it is left in an under-defined state and the
   sequential write preferred zones behave like conventional zones
   (probably very badly performing ones, though)

Not surprisingly this lukewarm model didn't prove to be very useful and
was finally removed from the ZBC and SBC specs (NVMe never implemented
it).  Due to to the easily disappearing write pointer host software
could never rely on the write pointer to actually be useful for say
recovery.

Fortunately only a few HDD prototypes shipped using this model which
never made it to mass production.  Drop the support before it is too
late.  Note that any such host aware prototype HDD can still be used
with Linux as we'll now treat it as a conventional HDD.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20231217165359.604246-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2023-12-19 20:17:43 -07:00
..
acorn.c block/partitions/acorn: Remove redundant assignments 2022-04-23 07:15:26 -06:00
aix.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
amiga.c block/partition: fix signedness issue for Amiga partitions 2023-07-05 16:34:56 -06:00
atari.c block/partitions/atari: Remove redundant assignment 2022-04-23 07:15:26 -06:00
atari.h block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
check.h block: Convert read_part_sector() to use a folio 2022-08-02 12:34:03 -04:00
cmdline.c block: use strscpy() to instead of strncpy() 2023-08-22 18:07:50 -06:00
core.c block: remove support for the host aware zone model 2023-12-19 20:17:43 -07:00
efi.c partitions/efi: use bdev_nr_bytes instead of open coding it 2021-10-19 06:16:50 -06:00
efi.h block: remove genhd.h 2022-02-02 07:49:59 -07:00
ibm.c partitions/ibm: Introduce defines for magic string length values 2023-10-04 08:04:08 -06:00
karma.c block: remove block/partitions/karma.h 2020-03-24 07:57:08 -06:00
Kconfig block: move menu "Partition type" to block/partitions/Kconfig 2021-10-18 06:17:35 -06:00
ldm.c block/partitions/ldm: Remove redundant assignments 2022-04-23 07:15:26 -06:00
ldm.h block: remove genhd.h 2022-02-02 07:49:59 -07:00
mac.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
mac.h block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
Makefile block: merge partition-generic.c and check.c 2020-03-24 07:57:08 -06:00
msdos.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
osf.c block: remove block/partitions/osf.h 2020-03-24 07:57:08 -06:00
sgi.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
sun.c block: store a gendisk in struct parsed_partitions 2021-08-12 10:31:35 -06:00
sysv68.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00
ultrix.c block: declare all partition detection routines in check.h 2020-03-24 07:57:08 -06:00