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authorRoland Dreier <roland@purestorage.com>2013-02-08 15:18:39 -0800
committerNicholas Bellinger <nab@linux-iscsi.org>2013-02-13 12:16:05 -0800
commitbb992e72f9b751fceb04afeb7736b6a3e50effcf (patch)
tree432d59d06184a8909b4e43e0ae9fdb0dd4bdf1ed /drivers/target
parent33633676df0d16d0685f2fbc571143801bc16e3b (diff)
downloadlinux-bb992e72f9b751fceb04afeb7736b6a3e50effcf.tar.gz
target: Fix error checking for UNMAP commands
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) Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target')
-rw-r--r--drivers/target/target_core_iblock.c11
-rw-r--r--drivers/target/target_core_transport.c10
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 2f74e17ad3e..facee5f74fa 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -391,10 +391,19 @@ iblock_execute_unmap(struct se_cmd *cmd)
sense_reason_t ret = 0;
int dl, bd_dl, err;
+ /* We never set ANC_SUP */
+ if (cmd->t_task_cdb[1])
+ return TCM_INVALID_CDB_FIELD;
+
+ if (cmd->data_length == 0) {
+ target_complete_cmd(cmd, SAM_STAT_GOOD);
+ return 0;
+ }
+
if (cmd->data_length < 8) {
pr_warn("UNMAP parameter list length %u too small\n",
cmd->data_length);
- return TCM_INVALID_PARAMETER_LIST;
+ return TCM_PARAMETER_LIST_LENGTH_ERROR;
}
buf = transport_kmap_data_sg(cmd);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 96b64d57ebb..2030b608136 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -1517,6 +1517,7 @@ void transport_generic_request_failure(struct se_cmd *cmd,
case TCM_UNSUPPORTED_SCSI_OPCODE:
case TCM_INVALID_CDB_FIELD:
case TCM_INVALID_PARAMETER_LIST:
+ case TCM_PARAMETER_LIST_LENGTH_ERROR:
case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
case TCM_UNKNOWN_MODE_PAGE:
case TCM_WRITE_PROTECTED:
@@ -2677,6 +2678,15 @@ transport_send_check_condition_and_sense(struct se_cmd *cmd,
/* INVALID FIELD IN PARAMETER LIST */
buffer[SPC_ASC_KEY_OFFSET] = 0x26;
break;
+ case TCM_PARAMETER_LIST_LENGTH_ERROR:
+ /* CURRENT ERROR */
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ /* ILLEGAL REQUEST */
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ /* PARAMETER LIST LENGTH ERROR */
+ buffer[SPC_ASC_KEY_OFFSET] = 0x1a;
+ break;
case TCM_UNEXPECTED_UNSOLICITED_DATA:
/* CURRENT ERROR */
buffer[0] = 0x70;