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21e851943e
linux/include/trace/events/target.h
Roland Dreier e5c0d6ad55 target: Add tracepoints for SCSI commands being processed 
This patch adds tracepoints to the target code for commands being
received and being completed, which is quite useful for debugging
interactions with initiators. For example, one can do something like the
following to watch commands that are completing unsuccessfully:

    # echo 'scsi_status!=0' > /sys/kernel/debug/tracing/events/target/target_cmd_complete/filter
    # echo 1 > /sys/kernel/debug/tracing/events/target/target_cmd_complete/enable

        <run command that fails>

    # cat /sys/kernel/debug/tracing/trace
         iscsi_trx-0-1902  [003] ...1 990185.810385: target_cmd_complete: iqn.1993-08.org.debian:01:e51ede6aacfd <- LUN 001 status CHECK CONDITION (sense len 18 / 70 00 05 00 00 00 00 0a 00 00 00 00 20 00 00 00 00 00)  0x95 data_length    512  CDB 95 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  (TA:SIMPLE C:00)

(v2: Drop undefined COMPARE_AND_WRITE)

Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2013-07-07 18:36:44 -07:00

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#undef TRACE_SYSTEM
#define TRACE_SYSTEM target
#if !defined(_TRACE_TARGET_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_TARGET_H
#include <linux/tracepoint.h>
#include <linux/trace_seq.h>
#include <scsi/scsi.h>
#include <scsi/scsi_tcq.h>
#include <target/target_core_base.h>
/* cribbed verbatim from <trace/event/scsi.h> */
#define scsi_opcode_name(opcode) { opcode, #opcode }
#define show_opcode_name(val) \
__print_symbolic(val, \
scsi_opcode_name(TEST_UNIT_READY), \
scsi_opcode_name(REZERO_UNIT), \
scsi_opcode_name(REQUEST_SENSE), \
scsi_opcode_name(FORMAT_UNIT), \
scsi_opcode_name(READ_BLOCK_LIMITS), \
scsi_opcode_name(REASSIGN_BLOCKS), \
scsi_opcode_name(INITIALIZE_ELEMENT_STATUS), \
scsi_opcode_name(READ_6), \
scsi_opcode_name(WRITE_6), \
scsi_opcode_name(SEEK_6), \
scsi_opcode_name(READ_REVERSE), \
scsi_opcode_name(WRITE_FILEMARKS), \
scsi_opcode_name(SPACE), \
scsi_opcode_name(INQUIRY), \
scsi_opcode_name(RECOVER_BUFFERED_DATA), \
scsi_opcode_name(MODE_SELECT), \
scsi_opcode_name(RESERVE), \
scsi_opcode_name(RELEASE), \
scsi_opcode_name(COPY), \
scsi_opcode_name(ERASE), \
scsi_opcode_name(MODE_SENSE), \
scsi_opcode_name(START_STOP), \
scsi_opcode_name(RECEIVE_DIAGNOSTIC), \
scsi_opcode_name(SEND_DIAGNOSTIC), \
scsi_opcode_name(ALLOW_MEDIUM_REMOVAL), \
scsi_opcode_name(SET_WINDOW), \
scsi_opcode_name(READ_CAPACITY), \
scsi_opcode_name(READ_10), \
scsi_opcode_name(WRITE_10), \
scsi_opcode_name(SEEK_10), \
scsi_opcode_name(POSITION_TO_ELEMENT), \
scsi_opcode_name(WRITE_VERIFY), \
scsi_opcode_name(VERIFY), \
scsi_opcode_name(SEARCH_HIGH), \
scsi_opcode_name(SEARCH_EQUAL), \
scsi_opcode_name(SEARCH_LOW), \
scsi_opcode_name(SET_LIMITS), \
scsi_opcode_name(PRE_FETCH), \
scsi_opcode_name(READ_POSITION), \
scsi_opcode_name(SYNCHRONIZE_CACHE), \
scsi_opcode_name(LOCK_UNLOCK_CACHE), \
scsi_opcode_name(READ_DEFECT_DATA), \
scsi_opcode_name(MEDIUM_SCAN), \
scsi_opcode_name(COMPARE), \
scsi_opcode_name(COPY_VERIFY), \
scsi_opcode_name(WRITE_BUFFER), \
scsi_opcode_name(READ_BUFFER), \
scsi_opcode_name(UPDATE_BLOCK), \
scsi_opcode_name(READ_LONG), \
scsi_opcode_name(WRITE_LONG), \
scsi_opcode_name(CHANGE_DEFINITION), \
scsi_opcode_name(WRITE_SAME), \
scsi_opcode_name(UNMAP), \
scsi_opcode_name(READ_TOC), \
scsi_opcode_name(LOG_SELECT), \
scsi_opcode_name(LOG_SENSE), \
scsi_opcode_name(XDWRITEREAD_10), \
scsi_opcode_name(MODE_SELECT_10), \
scsi_opcode_name(RESERVE_10), \
scsi_opcode_name(RELEASE_10), \
scsi_opcode_name(MODE_SENSE_10), \
scsi_opcode_name(PERSISTENT_RESERVE_IN), \
scsi_opcode_name(PERSISTENT_RESERVE_OUT), \
scsi_opcode_name(VARIABLE_LENGTH_CMD), \
scsi_opcode_name(REPORT_LUNS), \
scsi_opcode_name(MAINTENANCE_IN), \
scsi_opcode_name(MAINTENANCE_OUT), \
scsi_opcode_name(MOVE_MEDIUM), \
scsi_opcode_name(EXCHANGE_MEDIUM), \
scsi_opcode_name(READ_12), \
scsi_opcode_name(WRITE_12), \
scsi_opcode_name(WRITE_VERIFY_12), \
scsi_opcode_name(SEARCH_HIGH_12), \
scsi_opcode_name(SEARCH_EQUAL_12), \
scsi_opcode_name(SEARCH_LOW_12), \
scsi_opcode_name(READ_ELEMENT_STATUS), \
scsi_opcode_name(SEND_VOLUME_TAG), \
scsi_opcode_name(WRITE_LONG_2), \
scsi_opcode_name(READ_16), \
scsi_opcode_name(WRITE_16), \
scsi_opcode_name(VERIFY_16), \
scsi_opcode_name(WRITE_SAME_16), \
scsi_opcode_name(SERVICE_ACTION_IN), \
scsi_opcode_name(SAI_READ_CAPACITY_16), \
scsi_opcode_name(SAI_GET_LBA_STATUS), \
scsi_opcode_name(MI_REPORT_TARGET_PGS), \
scsi_opcode_name(MO_SET_TARGET_PGS), \
scsi_opcode_name(READ_32), \
scsi_opcode_name(WRITE_32), \
scsi_opcode_name(WRITE_SAME_32), \
scsi_opcode_name(ATA_16), \
scsi_opcode_name(ATA_12))
#define show_task_attribute_name(val) \
__print_symbolic(val, \
{ MSG_SIMPLE_TAG, "SIMPLE" }, \
{ MSG_HEAD_TAG, "HEAD" }, \
{ MSG_ORDERED_TAG, "ORDERED" }, \
{ MSG_ACA_TAG, "ACA" } )
#define show_scsi_status_name(val) \
__print_symbolic(val, \
{ SAM_STAT_GOOD, "GOOD" }, \
{ SAM_STAT_CHECK_CONDITION, "CHECK CONDITION" }, \
{ SAM_STAT_CONDITION_MET, "CONDITION MET" }, \
{ SAM_STAT_BUSY, "BUSY" }, \
{ SAM_STAT_INTERMEDIATE, "INTERMEDIATE" }, \
{ SAM_STAT_INTERMEDIATE_CONDITION_MET, "INTERMEDIATE CONDITION MET" }, \
{ SAM_STAT_RESERVATION_CONFLICT, "RESERVATION CONFLICT" }, \
{ SAM_STAT_COMMAND_TERMINATED, "COMMAND TERMINATED" }, \
{ SAM_STAT_TASK_SET_FULL, "TASK SET FULL" }, \
{ SAM_STAT_ACA_ACTIVE, "ACA ACTIVE" }, \
{ SAM_STAT_TASK_ABORTED, "TASK ABORTED" } )
TRACE_EVENT(target_sequencer_start,
TP_PROTO(struct se_cmd *cmd),
TP_ARGS(cmd),
TP_STRUCT__entry(
__field( unsigned int, unpacked_lun )
__field( unsigned int, opcode )
__field( unsigned int, data_length )
__field( unsigned int, task_attribute )
__array( unsigned char, cdb, TCM_MAX_COMMAND_SIZE )
__string( initiator, cmd->se_sess->se_node_acl->initiatorname )
),
TP_fast_assign(
__entry->unpacked_lun = cmd->se_lun->unpacked_lun;
__entry->opcode = cmd->t_task_cdb[0];
__entry->data_length = cmd->data_length;
__entry->task_attribute = cmd->sam_task_attr;
memcpy(__entry->cdb, cmd->t_task_cdb, TCM_MAX_COMMAND_SIZE);
__assign_str(initiator, cmd->se_sess->se_node_acl->initiatorname);
),
TP_printk("%s -> LUN %03u %s data_length %6u CDB %s (TA:%s C:%02x)",
__get_str(initiator), __entry->unpacked_lun,
show_opcode_name(__entry->opcode),
__entry->data_length, __print_hex(__entry->cdb, 16),
show_task_attribute_name(__entry->task_attribute),
scsi_command_size(__entry->cdb) <= 16 ?
__entry->cdb[scsi_command_size(__entry->cdb) - 1] :
__entry->cdb[1]
)
);
TRACE_EVENT(target_cmd_complete,
TP_PROTO(struct se_cmd *cmd),
TP_ARGS(cmd),
TP_STRUCT__entry(
__field( unsigned int, unpacked_lun )
__field( unsigned int, opcode )
__field( unsigned int, data_length )
__field( unsigned int, task_attribute )
__field( unsigned char, scsi_status )
__field( unsigned char, sense_length )
__array( unsigned char, cdb, TCM_MAX_COMMAND_SIZE )
__array( unsigned char, sense_data, 18 )
__string(initiator, cmd->se_sess->se_node_acl->initiatorname)
),
TP_fast_assign(
__entry->unpacked_lun = cmd->se_lun->unpacked_lun;
__entry->opcode = cmd->t_task_cdb[0];
__entry->data_length = cmd->data_length;
__entry->task_attribute = cmd->sam_task_attr;
__entry->scsi_status = cmd->scsi_status;
__entry->sense_length = cmd->scsi_status == SAM_STAT_CHECK_CONDITION ?
min(18, ((u8 *) cmd->sense_buffer)[SPC_ADD_SENSE_LEN_OFFSET] + 8) : 0;
memcpy(__entry->cdb, cmd->t_task_cdb, TCM_MAX_COMMAND_SIZE);
memcpy(__entry->sense_data, cmd->sense_buffer, __entry->sense_length);
__assign_str(initiator, cmd->se_sess->se_node_acl->initiatorname);
),
TP_printk("%s <- LUN %03u status %s (sense len %d%s%s) %s data_length %6u CDB %s (TA:%s C:%02x)",
__get_str(initiator), __entry->unpacked_lun,
show_scsi_status_name(__entry->scsi_status),
__entry->sense_length, __entry->sense_length ? " / " : "",
__print_hex(__entry->sense_data, __entry->sense_length),
show_opcode_name(__entry->opcode),
__entry->data_length, __print_hex(__entry->cdb, 16),
show_task_attribute_name(__entry->task_attribute),
scsi_command_size(__entry->cdb) <= 16 ?
__entry->cdb[scsi_command_size(__entry->cdb) - 1] :
__entry->cdb[1]
)
);
#endif /* _TRACE_TARGET_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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