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authorHannes Reinecke <hare@suse.de>2016-10-18 15:40:34 +0900
committerJens Axboe <axboe@fb.com>2016-10-18 19:49:11 -0600
commit89d9475610771b5e5fe1879075f0fc9ba6e3755f (patch)
tree249b9ee1a63ba8ea3bf865f2890efbce6948f1de /include/scsi/scsi_proto.h
parent3ed05a987e0f63b21e634101e0b460d32f3581c3 (diff)
sd: Implement support for ZBC devices
Implement ZBC support functions to setup zoned disks, both host-managed and host-aware models. Only zoned disks that satisfy the following conditions are supported: 1) All zones are the same size, with the exception of an eventual last smaller runt zone. 2) For host-managed disks, reads are unrestricted (reads are not failed due to zone or write pointer alignement constraints). Zoned disks that do not satisfy these 2 conditions are setup with a capacity of 0 to prevent their use. The function sd_zbc_read_zones, called from sd_revalidate_disk, checks that the device satisfies the above two constraints. This function may also change the disk capacity previously set by sd_read_capacity for devices reporting only the capacity of conventional zones at the beginning of the LBA range (i.e. devices reporting rc_basis set to 0). The capacity message output was moved out of sd_read_capacity into a new function sd_print_capacity to include this eventual capacity change by sd_zbc_read_zones. This new function also includes a call to sd_zbc_print_zones to display the number of zones and zone size of the device. Signed-off-by: Hannes Reinecke <hare@suse.de> [Damien: * Removed zone cache support * Removed mapping of discard to reset write pointer command * Modified sd_zbc_read_zones to include checks that the device satisfies the kernel constraints * Implemeted REPORT ZONES setup and post-processing based on code from Shaun Tancheff <shaun.tancheff@seagate.com> * Removed confusing use of 512B sector units in functions interface] Signed-off-by: Damien Le Moal <damien.lemoal@hgst.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Shaun Tancheff <shaun.tancheff@seagate.com> Tested-by: Shaun Tancheff <shaun.tancheff@seagate.com> Acked-by: Martin K. Petersen <martin.petersen@oracle.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/scsi/scsi_proto.h')
-rw-r--r--include/scsi/scsi_proto.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
index d1defd1ebd95..6ba66e01f6df 100644
--- a/include/scsi/scsi_proto.h
+++ b/include/scsi/scsi_proto.h
@@ -299,4 +299,21 @@ struct scsi_lun {
#define SCSI_ACCESS_STATE_MASK 0x0f
#define SCSI_ACCESS_STATE_PREFERRED 0x80
+/* Reporting options for REPORT ZONES */
+enum zbc_zone_reporting_options {
+ ZBC_ZONE_REPORTING_OPTION_ALL = 0,
+ ZBC_ZONE_REPORTING_OPTION_EMPTY,
+ ZBC_ZONE_REPORTING_OPTION_IMPLICIT_OPEN,
+ ZBC_ZONE_REPORTING_OPTION_EXPLICIT_OPEN,
+ ZBC_ZONE_REPORTING_OPTION_CLOSED,
+ ZBC_ZONE_REPORTING_OPTION_FULL,
+ ZBC_ZONE_REPORTING_OPTION_READONLY,
+ ZBC_ZONE_REPORTING_OPTION_OFFLINE,
+ ZBC_ZONE_REPORTING_OPTION_NEED_RESET_WP = 0x10,
+ ZBC_ZONE_REPORTING_OPTION_NON_SEQWRITE,
+ ZBC_ZONE_REPORTING_OPTION_NON_WP = 0x3f,
+};
+
+#define ZBC_REPORT_ZONE_PARTIAL 0x80
+
#endif /* _SCSI_PROTO_H_ */