SBC-3 (revision 35) says: The PARAMETER LIST LENGTH field specifies the length in bytes of the UNMAP parameter list that is available to be transferred from the Data-Out Buffer. If the parameter list length is greater than zero and less than 0008h (i.e., eight), then the device server shall terminate the command with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to PARAMETER LIST LENGTH ERROR. A PARAMETER LIST LENGTH set to zero specifies that no data shall be sent. so our sense code for too-short descriptors was wrong, and we were incorrectly failing commands that didn't transfer any descriptors. While we're at it, also handle the UNMAP check: If the ANCHOR bit is set to one, and the ANC_SUP bit in the Logical Block Provisioning VPD page (see 6.6.4) is set to zero, then the device server shall terminate the command with CHECK CONDITION status with the sense key set to ILLEGAL REQUEST and the additional sense code set to INVALID FIELD IN CDB. (chris boot: Fix wrong cut+paste comment in transport_send_check_condition_and_sense)
Unified · Split
| @@ -391,10 +391,19 @@ iblock_execute_unmap(struct se_cmd *cmd) · 390 unmodified lines | ||
| 391 | 391 | sense_reason_t ret = 0; |
| 392 | 392 | int dl, bd_dl, err; |
| 393 | 393 | |
| 394 | + /* We never set ANC_SUP */ | |
| 395 | + if (cmd->t_task_cdb[1]) | |
| 396 | + return TCM_INVALID_CDB_FIELD; | |
| 397 | + | |
| 398 | + if (cmd->data_length == 0) { | |
| 399 | + target_complete_cmd(cmd, SAM_STAT_GOOD); | |
| 400 | + return 0; | |
| 401 | + } | |
| 402 | + | |
| 394 | 403 | if (cmd->data_length < 8) { |
| 395 | 404 | pr_warn("UNMAP parameter list length %u too small\n", |
| 396 | 405 | cmd->data_length); |
| 397 | − return TCM_INVALID_PARAMETER_LIST; | |
| 406 | + return TCM_PARAMETER_LIST_LENGTH_ERROR; | |
| 398 | 407 | } |
| 399 | 408 | |
| 400 | 409 | buf = transport_kmap_data_sg(cmd); |
| @@ -1517,6 +1517,7 @@ void transport_generic_request_failure(struct se_cmd *cmd, · 1516 unmodified lines | ||
| 1517 | 1517 | case TCM_UNSUPPORTED_SCSI_OPCODE: |
| 1518 | 1518 | case TCM_INVALID_CDB_FIELD: |
| 1519 | 1519 | case TCM_INVALID_PARAMETER_LIST: |
| 1520 | + case TCM_PARAMETER_LIST_LENGTH_ERROR: | |
| 1520 | 1521 | case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE: |
| 1521 | 1522 | case TCM_UNKNOWN_MODE_PAGE: |
| 1522 | 1523 | case TCM_WRITE_PROTECTED: |
| @@ -2677,6 +2678,15 @@ transport_send_check_condition_and_sense(struct se_cmd *cmd, · 1154 unmodified lines | ||
| 2677 | 2678 | /* INVALID FIELD IN PARAMETER LIST */ |
| 2678 | 2679 | buffer[SPC_ASC_KEY_OFFSET] = 0x26; |
| 2679 | 2680 | break; |
| 2681 | + case TCM_PARAMETER_LIST_LENGTH_ERROR: | |
| 2682 | + /* CURRENT ERROR */ | |
| 2683 | + buffer[0] = 0x70; | |
| 2684 | + buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10; | |
| 2685 | + /* ILLEGAL REQUEST */ | |
| 2686 | + buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST; | |
| 2687 | + /* PARAMETER LIST LENGTH ERROR */ | |
| 2688 | + buffer[SPC_ASC_KEY_OFFSET] = 0x1a; | |
| 2689 | + break; | |
| 2680 | 2690 | case TCM_UNEXPECTED_UNSOLICITED_DATA: |
| 2681 | 2691 | /* CURRENT ERROR */ |
| 2682 | 2692 | buffer[0] = 0x70; |
| @@ -195,6 +195,7 @@ enum tcm_sense_reason_table { · 194 unmodified lines | ||
| 195 | 195 | TCM_RESERVATION_CONFLICT = R(0x10), |
| 196 | 196 | TCM_ADDRESS_OUT_OF_RANGE = R(0x11), |
| 197 | 197 | TCM_OUT_OF_RESOURCES = R(0x12), |
| 198 | + TCM_PARAMETER_LIST_LENGTH_ERROR = R(0x13), | |
| 198 | 199 | #undef R |
| 199 | 200 | }; |
| 200 | 201 | |