target: Simplify fabric sense data length handling
Every fabric driver has to supply a se_tfo->set_fabric_sense_len()
method, just so iSCSI can return an offset of 2. However, every fabric
driver is already allocating a sense buffer and passing it into the
target core, either via transport_init_se_cmd() or target_submit_cmd().
So instead of having iSCSI pass the start of its sense buffer into the
core and then later tell the core to skip the first 2 bytes, it seems
easier for iSCSI just to do the offset of 2 when it passes the sense
buffer into the core. Then we can drop the se_tfo->set_fabric_sense_len()
everywhere, and just add a couple of lines of code to iSCSI to set the
sense data length to the beginning of the buffer right before it sends
it over the network.
(nab: Remove .set_fabric_sense_len usage from tcm_qla2xxx_npiv_ops +
change transport_get_sense_buffer to follow v3.6-rc6 code w/o
->set_fabric_sense_len usage)
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index fd0d0f0..d6d4844 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -567,9 +567,7 @@
*/
static unsigned char *transport_get_sense_buffer(struct se_cmd *cmd)
{
- unsigned char *buffer = cmd->sense_buffer;
struct se_device *dev = cmd->se_dev;
- u32 offset = 0;
WARN_ON(!cmd->se_lun);
@@ -579,14 +577,11 @@
if (cmd->se_cmd_flags & SCF_SENT_CHECK_CONDITION)
return NULL;
- offset = cmd->se_tfo->set_fabric_sense_len(cmd, TRANSPORT_SENSE_BUFFER);
-
- /* Automatically padded */
- cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
+ cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER;
pr_debug("HBA_[%u]_PLUG[%s]: Requesting sense for SAM STATUS: 0x%02x\n",
dev->se_hba->hba_id, dev->transport->name, cmd->scsi_status);
- return &buffer[offset];
+ return cmd->sense_buffer;
}
void target_complete_cmd(struct se_cmd *cmd, u8 scsi_status)
@@ -2804,7 +2799,6 @@
{
unsigned char *buffer = cmd->sense_buffer;
unsigned long flags;
- int offset;
u8 asc = 0, ascq = 0;
spin_lock_irqsave(&cmd->t_state_lock, flags);
@@ -2820,14 +2814,7 @@
if (!from_transport)
cmd->se_cmd_flags |= SCF_EMULATED_TASK_SENSE;
- /*
- * Data Segment and SenseLength of the fabric response PDU.
- *
- * TRANSPORT_SENSE_BUFFER is now set to SCSI_SENSE_BUFFERSIZE
- * from include/scsi/scsi_cmnd.h
- */
- offset = cmd->se_tfo->set_fabric_sense_len(cmd,
- TRANSPORT_SENSE_BUFFER);
+
/*
* Actual SENSE DATA, see SPC-3 7.23.2 SPC_SENSE_KEY_OFFSET uses
* SENSE KEY values from include/scsi/scsi.h
@@ -2835,151 +2822,151 @@
switch (reason) {
case TCM_NON_EXISTENT_LUN:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* LOGICAL UNIT NOT SUPPORTED */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x25;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x25;
break;
case TCM_UNSUPPORTED_SCSI_OPCODE:
case TCM_SECTOR_COUNT_TOO_MANY:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* INVALID COMMAND OPERATION CODE */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x20;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x20;
break;
case TCM_UNKNOWN_MODE_PAGE:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* INVALID FIELD IN CDB */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x24;
break;
case TCM_CHECK_CONDITION_ABORT_CMD:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ABORTED COMMAND */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
/* BUS DEVICE RESET FUNCTION OCCURRED */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x29;
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x03;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x29;
+ buffer[SPC_ASCQ_KEY_OFFSET] = 0x03;
break;
case TCM_INCORRECT_AMOUNT_OF_DATA:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ABORTED COMMAND */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
/* WRITE ERROR */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x0c;
/* NOT ENOUGH UNSOLICITED DATA */
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0d;
+ buffer[SPC_ASCQ_KEY_OFFSET] = 0x0d;
break;
case TCM_INVALID_CDB_FIELD:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* INVALID FIELD IN CDB */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x24;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x24;
break;
case TCM_INVALID_PARAMETER_LIST:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* INVALID FIELD IN PARAMETER LIST */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x26;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x26;
break;
case TCM_UNEXPECTED_UNSOLICITED_DATA:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ABORTED COMMAND */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
/* WRITE ERROR */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x0c;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x0c;
/* UNEXPECTED_UNSOLICITED_DATA */
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x0c;
+ buffer[SPC_ASCQ_KEY_OFFSET] = 0x0c;
break;
case TCM_SERVICE_CRC_ERROR:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ABORTED COMMAND */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
/* PROTOCOL SERVICE CRC ERROR */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x47;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x47;
/* N/A */
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x05;
+ buffer[SPC_ASCQ_KEY_OFFSET] = 0x05;
break;
case TCM_SNACK_REJECTED:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ABORTED COMMAND */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
+ buffer[SPC_SENSE_KEY_OFFSET] = ABORTED_COMMAND;
/* READ ERROR */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x11;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x11;
/* FAILED RETRANSMISSION REQUEST */
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = 0x13;
+ buffer[SPC_ASCQ_KEY_OFFSET] = 0x13;
break;
case TCM_WRITE_PROTECTED:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* DATA PROTECT */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
+ buffer[SPC_SENSE_KEY_OFFSET] = DATA_PROTECT;
/* WRITE PROTECTED */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x27;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x27;
break;
case TCM_ADDRESS_OUT_OF_RANGE:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* LOGICAL BLOCK ADDRESS OUT OF RANGE */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x21;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x21;
break;
case TCM_CHECK_CONDITION_UNIT_ATTENTION:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* UNIT ATTENTION */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
+ buffer[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION;
core_scsi3_ua_for_check_condition(cmd, &asc, &ascq);
- buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+ buffer[SPC_ASC_KEY_OFFSET] = asc;
+ buffer[SPC_ASCQ_KEY_OFFSET] = ascq;
break;
case TCM_CHECK_CONDITION_NOT_READY:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* Not Ready */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = NOT_READY;
+ buffer[SPC_SENSE_KEY_OFFSET] = NOT_READY;
transport_get_sense_codes(cmd, &asc, &ascq);
- buffer[offset+SPC_ASC_KEY_OFFSET] = asc;
- buffer[offset+SPC_ASCQ_KEY_OFFSET] = ascq;
+ buffer[SPC_ASC_KEY_OFFSET] = asc;
+ buffer[SPC_ASCQ_KEY_OFFSET] = ascq;
break;
case TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE:
default:
/* CURRENT ERROR */
- buffer[offset] = 0x70;
- buffer[offset+SPC_ADD_SENSE_LEN_OFFSET] = 10;
+ buffer[0] = 0x70;
+ buffer[SPC_ADD_SENSE_LEN_OFFSET] = 10;
/* ILLEGAL REQUEST */
- buffer[offset+SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
+ buffer[SPC_SENSE_KEY_OFFSET] = ILLEGAL_REQUEST;
/* LOGICAL UNIT COMMUNICATION FAILURE */
- buffer[offset+SPC_ASC_KEY_OFFSET] = 0x80;
+ buffer[SPC_ASC_KEY_OFFSET] = 0x80;
break;
}
/*
@@ -2990,7 +2977,7 @@
* Automatically padded, this value is encoded in the fabric's
* data_length response PDU containing the SCSI defined sense data.
*/
- cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER + offset;
+ cmd->scsi_sense_length = TRANSPORT_SENSE_BUFFER;
after_reason:
return cmd->se_tfo->queue_status(cmd);