From: Tom Yan <tom.ty89@xxxxxxxxx>
With this patch, users can make use of the SANITIZE DEVICE feature
set through utility like sg_sanitize.
Support for BLOCK ERASE, CRYPTOGRAPHIC ERASE and EXIT FAILURE MODE
has been implemented. Support for OVERWRITE that involves a
parameter list has been left out for now.
Further support for command with IMMED bit set to zero, REQUEST
SENSE translation for user-space status polling, and support
checking in IDENTIFY DEVICE data log (return proper sense data
when designated method is not supported) should be implemented
in the future as well.
`sg_sanitize -e -B|-C|-F /dev/sdX` should work fine with this.
Signed-off-by: Tom Yan <tom.ty89@xxxxxxxxx>
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index bfec66f..a64991b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3346,6 +3346,63 @@ invalid_opcode:
return 1;
}
+static unsigned int ata_scsi_sanitize_xlat(struct ata_queued_cmd *qc) {
+ struct ata_taskfile *tf = &qc->tf;
+ struct scsi_cmnd *scmd = qc->scsicmd;
+ struct ata_device *dev = qc->dev;
+ const u8 *cdb = scmd->cmnd;
+ u16 fp;
+ u8 bp = 0xff;
+
+ /* for now we only support SANITIZE with IMMED bit set */
+ if (unlikely(!(cdb[1] & 0x80))) {
+ fp = 1;
+ bp = 7;
+ goto invalid_fld;
+ }
+
+ tf->protocol = ATA_PROT_NODATA;
+ tf->command = ATA_CMD_SANITIZE_DEVICE;
+ tf->hob_nsect |= (cdb[1] & 0x40) << 1;
+ tf->nsect |= (cdb[1] & 0x20) >> 1;
+ tf->flags |= ATA_TFLAG_LBA48 | ATA_TFLAG_ISADDR;
+
+ switch (cdb[1] & 0x1f) {
+ /* TODO: add support for OVERWRITE */
+ case 0x2: /* BLOCK ERASE */
+ tf->hob_feature = 0x0;
+ tf->feature = 0x12;
+ tf->hob_lbal = 0x42;
+ tf->lbah = 0x6b;
+ tf->lbam = 0x45;
+ tf->lbal = 0x72;
+ break;
+ case 0x3: /* CRYPTOGRAPHIC ERASE */
+ tf->hob_feature = 0x0;
+ tf->feature = 0x11;
+ tf->hob_lbal = 0x43;
+ tf->lbah = 0x72;
+ tf->lbam = 0x79;
+ tf->lbal = 0x70;
+ break;
+ case 0x1f: /* EXIT FAILURE MODE */
+ tf->hob_feature = 0x0;
+ tf->feature = 0x0;
+ tf->nsect |= 0x1;
+ break;
+ default:
+ fp = 1;
+ bp = 4;
+ goto invalid_fld;
+ }
+
+ return 0;
+
+invalid_fld:
+ ata_scsi_set_invalid_field(dev, scmd, fp, bp);
+ return 1;
+}
+
/**
* ata_scsi_report_zones_complete - convert ATA output
* @qc: command structure returning the data
@@ -3869,6 +3926,9 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
case WRITE_SAME_16:
return ata_scsi_write_same_xlat;
+ case SANITIZE:
+ return ata_scsi_sanitize_xlat;
+
case SYNCHRONIZE_CACHE:
if (ata_try_flush_cache(dev))
return ata_scsi_flush_xlat;
diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h
index d1defd1..20d6085 100644
--- a/include/scsi/scsi_proto.h
+++ b/include/scsi/scsi_proto.h
@@ -72,6 +72,7 @@
#define UNMAP 0x42
#define READ_TOC 0x43
#define READ_HEADER 0x44
+#define SANITIZE 0x48
#define GET_EVENT_STATUS_NOTIFICATION 0x4a
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
--
2.9.0
--
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