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target: Handle ATA_16 passthrough for pSCSI backend devices
The cdrecord uses ATA_PASS_THROUGH_16 command while burning CDs with a SATA CD-ROM. This patch adds support to it so that PSCSI CD-ROM passthrough works with the cdrecord. (nab: Add !passthrough check to prevent non pSCSI backends from ATA_16) Signed-off-by: Cong Meng <mc@linux.vnet.ibm.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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1 changed files with 32 additions and 0 deletions
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@ -2927,6 +2927,38 @@ static int transport_generic_cmd_sequencer(
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size = (cdb[7] << 8) | cdb[8];
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cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
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break;
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case ATA_16:
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/* Only support ATA passthrough to pSCSI backends.. */
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if (!passthrough)
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goto out_unsupported_cdb;
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/* T_LENGTH */
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switch (cdb[2] & 0x3) {
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case 0x0:
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sectors = 0;
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break;
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case 0x1:
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sectors = (((cdb[1] & 0x1) ? cdb[3] : 0) << 8) | cdb[4];
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break;
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case 0x2:
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sectors = (((cdb[1] & 0x1) ? cdb[5] : 0) << 8) | cdb[6];
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break;
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case 0x3:
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pr_err("T_LENGTH=0x3 not supported for ATA_16\n");
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goto out_invalid_cdb_field;
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}
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/* BYTE_BLOCK */
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if (cdb[2] & 0x4) {
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/* BLOCK T_TYPE: 512 or sector */
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size = sectors * ((cdb[2] & 0x10) ?
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dev->se_sub_dev->se_dev_attrib.block_size : 512);
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} else {
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/* BYTE */
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size = sectors;
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}
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cmd->se_cmd_flags |= SCF_SCSI_CONTROL_SG_IO_CDB;
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break;
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default:
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pr_warn("TARGET_CORE[%s]: Unsupported SCSI Opcode"
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" 0x%02x, sending CHECK_CONDITION.\n",
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