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authorDamien Le Moal <damien.lemoal@opensource.wdc.com>2022-04-21 21:30:20 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2022-04-26 06:23:05 +0300
commitc976e588b34e4ff2fdd2922edab4b983244a17e6 (patch)
treee9599d166f44a320cbe6f84cb3e39c33d065df8c /include/scsi
parent60caf3758103b8edc90724ba781ff119f739162a (diff)
downloadlinux-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.h9
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,