From 7437bb73f087e5f216f9c6603f5149d354e315af Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Sun, 17 Dec 2023 17:53:57 +0100 Subject: 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 Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20231217165359.604246-4-hch@lst.de Signed-off-by: Jens Axboe --- drivers/md/dm-kcopyd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/md/dm-kcopyd.c') diff --git a/drivers/md/dm-kcopyd.c b/drivers/md/dm-kcopyd.c index d01807c50f20..36bcfdccae04 100644 --- a/drivers/md/dm-kcopyd.c +++ b/drivers/md/dm-kcopyd.c @@ -807,7 +807,7 @@ void dm_kcopyd_copy(struct dm_kcopyd_client *kc, struct dm_io_region *from, */ if (!(job->flags & BIT(DM_KCOPYD_WRITE_SEQ))) { for (i = 0; i < job->num_dests; i++) { - if (bdev_zoned_model(dests[i].bdev) == BLK_ZONED_HM) { + if (bdev_is_zoned(dests[i].bdev)) { job->flags |= BIT(DM_KCOPYD_WRITE_SEQ); break; } -- cgit v1.2.3