diff options
| -rw-r--r-- | drivers/target/target_core_sbc.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 6863dbe0aadf..91a92f354e9f 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -563,6 +563,44 @@ sbc_compare_and_write(struct se_cmd *cmd) return TCM_NO_SENSE; } +static bool +sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb, + u32 sectors) +{ + if (!cmd->t_prot_sg || !cmd->t_prot_nents) + 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) + 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: + default: + return true; + } + + cmd->prot_type = dev->dev_attrib.pi_prot_type; + cmd->prot_length = dev->prot_length * sectors; + cmd->prot_handover = PROT_SEPERATED; + + return true; +} + sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) { @@ -583,6 +621,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) case READ_10: sectors = transport_get_sectors_10(cdb); cmd->t_task_lba = transport_lba_32(cdb); + + if (!sbc_check_prot(dev, cmd, cdb, sectors)) + return TCM_UNSUPPORTED_SCSI_OPCODE; + cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; cmd->execute_rw = ops->execute_rw; cmd->execute_cmd = sbc_execute_rw; @@ -590,6 +632,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) case READ_12: sectors = transport_get_sectors_12(cdb); cmd->t_task_lba = transport_lba_32(cdb); + + if (!sbc_check_prot(dev, cmd, cdb, sectors)) + return TCM_UNSUPPORTED_SCSI_OPCODE; + cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; cmd->execute_rw = ops->execute_rw; cmd->execute_cmd = sbc_execute_rw; @@ -597,6 +643,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) case READ_16: sectors = transport_get_sectors_16(cdb); cmd->t_task_lba = transport_lba_64(cdb); + + if (!sbc_check_prot(dev, cmd, cdb, sectors)) + return TCM_UNSUPPORTED_SCSI_OPCODE; + cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; cmd->execute_rw = ops->execute_rw; cmd->execute_cmd = sbc_execute_rw; @@ -612,6 +662,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) case WRITE_VERIFY: sectors = transport_get_sectors_10(cdb); cmd->t_task_lba = transport_lba_32(cdb); + + if (!sbc_check_prot(dev, cmd, cdb, sectors)) + return TCM_UNSUPPORTED_SCSI_OPCODE; + if (cdb[1] & 0x8) cmd->se_cmd_flags |= SCF_FUA; cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; @@ -621,6 +675,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) case WRITE_12: sectors = transport_get_sectors_12(cdb); cmd->t_task_lba = transport_lba_32(cdb); + + if (!sbc_check_prot(dev, cmd, cdb, sectors)) + return TCM_UNSUPPORTED_SCSI_OPCODE; + if (cdb[1] & 0x8) cmd->se_cmd_flags |= SCF_FUA; cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; @@ -630,6 +688,10 @@ sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) case WRITE_16: sectors = transport_get_sectors_16(cdb); cmd->t_task_lba = transport_lba_64(cdb); + + if (!sbc_check_prot(dev, cmd, cdb, sectors)) + return TCM_UNSUPPORTED_SCSI_OPCODE; + if (cdb[1] & 0x8) cmd->se_cmd_flags |= SCF_FUA; cmd->se_cmd_flags |= SCF_SCSI_DATA_CDB; |