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| author | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-04-21 21:30:20 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-04-26 06:23:05 +0300 |
| commit | c976e588b34e4ff2fdd2922edab4b983244a17e6 (patch) | |
| tree | e9599d166f44a320cbe6f84cb3e39c33d065df8c /include/scsi | |
| parent | 60caf3758103b8edc90724ba781ff119f739162a (diff) | |
| download | linux-c976e588b34e4ff2fdd2922edab4b983244a17e6.tar.xz | |
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 'include/scsi')
| -rw-r--r-- | include/scsi/scsi_proto.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h index f017843a8124..c03e35fc382c 100644 --- a/include/scsi/scsi_proto.h +++ b/include/scsi/scsi_proto.h @@ -307,7 +307,9 @@ enum zbc_zone_type { ZBC_ZONE_TYPE_CONV = 0x1, ZBC_ZONE_TYPE_SEQWRITE_REQ = 0x2, ZBC_ZONE_TYPE_SEQWRITE_PREF = 0x3, - /* 0x4 to 0xf are reserved */ + ZBC_ZONE_TYPE_SEQ_OR_BEFORE_REQ = 0x4, + ZBC_ZONE_TYPE_GAP = 0x5, + /* 0x6 to 0xf are reserved */ }; /* Zone conditions of REPORT ZONES zone descriptors */ @@ -323,6 +325,11 @@ enum zbc_zone_cond { ZBC_ZONE_COND_OFFLINE = 0xf, }; +enum zbc_zone_alignment_method { + ZBC_CONSTANT_ZONE_LENGTH = 0x1, + ZBC_CONSTANT_ZONE_START_OFFSET = 0x8, +}; + /* Version descriptor values for INQUIRY */ enum scsi_version_descriptor { SCSI_VERSION_DESCRIPTOR_FCP4 = 0x0a40, |