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| author | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-04-21 20:30:20 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-04-26 05:23:05 +0200 |
| commit | c976e588b34e4ff2fdd2922edab4b983244a17e6 (patch) | |
| tree | e9599d166f44a320cbe6f84cb3e39c33d065df8c /drivers/scsi/sd.h | |
| parent | scsi: sd: sd_zbc: Return early in sd_zbc_check_zoned_characteristics() (diff) | |
| download | linux-c976e588b34e4ff2fdd2922edab4b983244a17e6.tar.xz linux-c976e588b34e4ff2fdd2922edab4b983244a17e6.zip | |
scsi: sd: sd_zbc: Hide gap zones
ZBC-2 allows host-managed disks to report gap zones. This allow zoned disks
to report an offset between data zone starts that is a power of two even if
the number of logical blocks with data per zone is not a power of two.
Another new feature in ZBC-2 is support for constant zone starting LBA
offsets. For zoned disks that report a constant zone starting LBA offset,
hide the gap zones from the block layer. Report the offset between data
zone starts as zone size and report the number of logical blocks with data
per zone as the zone capacity.
Link: https://lore.kernel.org/r/20220421183023.3462291-7-bvanassche@acm.org
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
[ bvanassche: Reworked this patch ]
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/sd.h')
| -rw-r--r-- | drivers/scsi/sd.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index 47434f905b0a..d249933ba69e 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -99,6 +99,11 @@ struct scsi_disk { u32 zones_optimal_open; u32 zones_optimal_nonseq; u32 zones_max_open; + /* + * Either zero or a power of two. If not zero it means that the offset + * between zone starting LBAs is constant. + */ + u32 zone_starting_lba_gran; u32 *zones_wp_offset; spinlock_t zones_wp_offset_lock; u32 *rev_wp_offset; |