return TCM_NO_SENSE;
}
+static int
+sbc_set_prot_op_checks(u8 protect, enum target_prot_type prot_type,
+ bool is_write, struct se_cmd *cmd)
+{
+ if (is_write) {
+ cmd->prot_op = protect ? TARGET_PROT_DOUT_PASS :
+ TARGET_PROT_DOUT_INSERT;
+ switch (protect) {
+ case 0x0:
+ case 0x3:
+ cmd->prot_checks = 0;
+ break;
+ case 0x1:
+ case 0x5:
+ cmd->prot_checks = TARGET_DIF_CHECK_GUARD;
+ if (prot_type == TARGET_DIF_TYPE1_PROT)
+ cmd->prot_checks |= TARGET_DIF_CHECK_REFTAG;
+ break;
+ case 0x2:
+ if (prot_type == TARGET_DIF_TYPE1_PROT)
+ cmd->prot_checks = TARGET_DIF_CHECK_REFTAG;
+ break;
+ case 0x4:
+ cmd->prot_checks = TARGET_DIF_CHECK_GUARD;
+ break;
+ default:
+ pr_err("Unsupported protect field %d\n", protect);
+ return -EINVAL;
+ }
+ } else {
+ cmd->prot_op = protect ? TARGET_PROT_DIN_PASS :
+ TARGET_PROT_DIN_STRIP;
+ switch (protect) {
+ case 0x0:
+ case 0x1:
+ case 0x5:
+ cmd->prot_checks = TARGET_DIF_CHECK_GUARD;
+ if (prot_type == TARGET_DIF_TYPE1_PROT)
+ cmd->prot_checks |= TARGET_DIF_CHECK_REFTAG;
+ break;
+ case 0x2:
+ if (prot_type == TARGET_DIF_TYPE1_PROT)
+ cmd->prot_checks = TARGET_DIF_CHECK_REFTAG;
+ break;
+ case 0x3:
+ cmd->prot_checks = 0;
+ break;
+ case 0x4:
+ cmd->prot_checks = TARGET_DIF_CHECK_GUARD;
+ break;
+ default:
+ pr_err("Unsupported protect field %d\n", protect);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static bool
sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb,
- u32 sectors)
+ u32 sectors, bool is_write)
{
- if (!cmd->t_prot_sg || !cmd->t_prot_nents)
+ u8 protect = cdb[1] >> 5;
+
+ if ((!cmd->t_prot_sg || !cmd->t_prot_nents) && cmd->prot_pto)
return true;
switch (dev->dev_attrib.pi_prot_type) {
case TARGET_DIF_TYPE3_PROT:
- if (!(cdb[1] & 0xe0))
- return true;
-
cmd->reftag_seed = 0xffffffff;
break;
case TARGET_DIF_TYPE2_PROT:
- if (cdb[1] & 0xe0)
+ if (protect)
return false;
cmd->reftag_seed = cmd->t_task_lba;
break;
case TARGET_DIF_TYPE1_PROT:
- if (!(cdb[1] & 0xe0))
- return true;
-
cmd->reftag_seed = cmd->t_task_lba;
break;
case TARGET_DIF_TYPE0_PROT:
return true;
}
+ if (sbc_set_prot_op_checks(protect, dev->dev_attrib.pi_prot_type,
+ is_write, cmd))
+ return false;
+
cmd->prot_type = dev->dev_attrib.pi_prot_type;
cmd->prot_length = dev->prot_length * sectors;
- cmd->prot_handover = PROT_SEPERATED;
return true;
}
sectors = transport_get_sectors_10(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
- if (!sbc_check_prot(dev, cmd, cdb, sectors))
+ if (!sbc_check_prot(dev, cmd, cdb, sectors, false))
return TCM_UNSUPPORTED_SCSI_OPCODE;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
sectors = transport_get_sectors_12(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
- if (!sbc_check_prot(dev, cmd, cdb, sectors))
+ if (!sbc_check_prot(dev, cmd, cdb, sectors, false))
return TCM_UNSUPPORTED_SCSI_OPCODE;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
sectors = transport_get_sectors_16(cdb);
cmd->t_task_lba = transport_lba_64(cdb);
- if (!sbc_check_prot(dev, cmd, cdb, sectors))
+ if (!sbc_check_prot(dev, cmd, cdb, sectors, false))
return TCM_UNSUPPORTED_SCSI_OPCODE;
cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB;
sectors = transport_get_sectors_10(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
- if (!sbc_check_prot(dev, cmd, cdb, sectors))
+ if (!sbc_check_prot(dev, cmd, cdb, sectors, true))
return TCM_UNSUPPORTED_SCSI_OPCODE;
if (cdb[1] & 0x8)
sectors = transport_get_sectors_12(cdb);
cmd->t_task_lba = transport_lba_32(cdb);
- if (!sbc_check_prot(dev, cmd, cdb, sectors))
+ if (!sbc_check_prot(dev, cmd, cdb, sectors, true))
return TCM_UNSUPPORTED_SCSI_OPCODE;
if (cdb[1] & 0x8)
sectors = transport_get_sectors_16(cdb);
cmd->t_task_lba = transport_lba_64(cdb);
- if (!sbc_check_prot(dev, cmd, cdb, sectors))
+ if (!sbc_check_prot(dev, cmd, cdb, sectors, true))
return TCM_UNSUPPORTED_SCSI_OPCODE;
if (cdb[1] & 0x8)
left = sectors * dev->prot_length;
for_each_sg(cmd->t_prot_sg, psg, cmd->t_prot_nents, i) {
-
- len = min(psg->length, left);
- if (offset >= sg->length) {
- sg = sg_next(sg);
- offset = 0;
- }
+ unsigned int psg_len, copied = 0;
paddr = kmap_atomic(sg_page(psg)) + psg->offset;
- addr = kmap_atomic(sg_page(sg)) + sg->offset + offset;
-
- if (read)
- memcpy(paddr, addr, len);
- else
- memcpy(addr, paddr, len);
-
- left -= len;
- offset += len;
+ psg_len = min(left, psg->length);
+ while (psg_len) {
+ len = min(psg_len, sg->length - offset);
+ addr = kmap_atomic(sg_page(sg)) + sg->offset + offset;
+
+ if (read)
+ memcpy(paddr + copied, addr, len);
+ else
+ memcpy(addr, paddr + copied, len);
+
+ left -= len;
+ offset += len;
+ copied += len;
+ psg_len -= len;
+
+ if (offset >= sg->length) {
+ sg = sg_next(sg);
+ offset = 0;
+ }
+ kunmap_atomic(addr);
+ }
kunmap_atomic(paddr);
- kunmap_atomic(addr);
}
}