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[SCSI] scsi_trace: Enhance SCSI command tracing 

Various SCSI trace enhancements:

 - Display data and protection information scatterlist lengths in the
   trace output

 - Add support for VERIFY and WRITE SAME commands and decode the UNMAP
   bit if applicable

 - Add decoding of the PROTECT field for READ/VERIFY/WRITE/WRITE SAME
   commands as well as the EXPECTED INITIAL REFERENCE TAG field for
   their 32-byte variants

 - Decode READ CAPACITY(16), GET LBA STATUS, and UNMAP

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Martin K. Petersen 2010-03-23 01:16:57 -04:00 committed by James Bottomley
parent bf81623542
commit c446c1f990
2 changed files with 136 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

123
drivers/scsi/scsi_trace.c
View File

@ -19,7 +19,8 @@
#include <linux/trace_seq.h>
#include <trace/events/scsi.h>
#define SERVICE_ACTION(cdb) ((cdb[8] << 8) | cdb[9])
#define SERVICE_ACTION16(cdb) (cdb[1] & 0x1f)
#define SERVICE_ACTION32(cdb) ((cdb[8] << 8) | cdb[9])
static const char *
scsi_trace_misc(struct trace_seq *, unsigned char *, int);
@ -55,8 +56,9 @@ scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
txlen |= (cdb[7] << 8);
txlen |= cdb[8];
trace_seq_printf(p, "lba=%llu txlen=%llu",
(unsigned long long)lba, (unsigned long long)txlen);
trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
(unsigned long long)lba, (unsigned long long)txlen,
cdb[1] >> 5);
trace_seq_putc(p, 0);
return ret;
@ -77,8 +79,9 @@ scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
txlen |= (cdb[8] << 8);
txlen |= cdb[9];
trace_seq_printf(p, "lba=%llu txlen=%llu",
(unsigned long long)lba, (unsigned long long)txlen);
trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
(unsigned long long)lba, (unsigned long long)txlen,
cdb[1] >> 5);
trace_seq_putc(p, 0);
return ret;
@ -103,8 +106,13 @@ scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
txlen |= (cdb[12] << 8);
txlen |= cdb[13];
trace_seq_printf(p, "lba=%llu txlen=%llu",
(unsigned long long)lba, (unsigned long long)txlen);
trace_seq_printf(p, "lba=%llu txlen=%llu protect=%u",
(unsigned long long)lba, (unsigned long long)txlen,
cdb[1] >> 5);
if (cdb[0] == WRITE_SAME_16)
trace_seq_printf(p, " unmap=%u", cdb[1] >> 3 & 1);
trace_seq_putc(p, 0);
return ret;
@ -113,8 +121,27 @@ scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
static const char *
scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
const char *ret = p->buffer + p->len, *cmd;
sector_t lba = 0, txlen = 0;
u32 ei_lbrt = 0;
switch (SERVICE_ACTION32(cdb)) {
case READ_32:
cmd = "READ";
break;
case VERIFY_32:
cmd = "VERIFY";
break;
case WRITE_32:
cmd = "WRITE";
break;
case WRITE_SAME_32:
cmd = "WRITE_SAME";
break;
default:
trace_seq_printf(p, "UNKNOWN");
goto out;
}
lba |= ((u64)cdb[12] << 56);
lba |= ((u64)cdb[13] << 48);
@ -124,15 +151,76 @@ scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
lba |= (cdb[17] << 16);
lba |= (cdb[18] << 8);
lba |= cdb[19];
ei_lbrt |= (cdb[20] << 24);
ei_lbrt |= (cdb[21] << 16);
ei_lbrt |= (cdb[22] << 8);
ei_lbrt |= cdb[23];
txlen |= (cdb[28] << 24);
txlen |= (cdb[29] << 16);
txlen |= (cdb[30] << 8);
txlen |= cdb[31];
trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu",
(SERVICE_ACTION(cdb) == READ_32 ? "READ" : "WRITE"),
(unsigned long long)lba, (unsigned long long)txlen);
trace_seq_printf(p, "%s_32 lba=%llu txlen=%llu protect=%u ei_lbrt=%u",
cmd, (unsigned long long)lba,
(unsigned long long)txlen, cdb[10] >> 5, ei_lbrt);
if (SERVICE_ACTION32(cdb) == WRITE_SAME_32)
trace_seq_printf(p, " unmap=%u", cdb[10] >> 3 & 1);
out:
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_unmap(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
unsigned int regions = cdb[7] << 8 | cdb[8];
trace_seq_printf(p, "regions=%u", (regions - 8) / 16);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_service_action_in(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len, *cmd;
sector_t lba = 0;
u32 alloc_len = 0;
switch (SERVICE_ACTION16(cdb)) {
case SAI_READ_CAPACITY_16:
cmd = "READ_CAPACITY_16";
break;
case SAI_GET_LBA_STATUS:
cmd = "GET_LBA_STATUS";
break;
default:
trace_seq_printf(p, "UNKNOWN");
goto out;
}
lba |= ((u64)cdb[2] << 56);
lba |= ((u64)cdb[3] << 48);
lba |= ((u64)cdb[4] << 40);
lba |= ((u64)cdb[5] << 32);
lba |= (cdb[6] << 24);
lba |= (cdb[7] << 16);
lba |= (cdb[8] << 8);
lba |= cdb[9];
alloc_len |= (cdb[10] << 24);
alloc_len |= (cdb[11] << 16);
alloc_len |= (cdb[12] << 8);
alloc_len |= cdb[13];
trace_seq_printf(p, "%s lba=%llu alloc_len=%u", cmd,
(unsigned long long)lba, alloc_len);
out:
trace_seq_putc(p, 0);
return ret;
@ -141,9 +229,11 @@ scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
static const char *
scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
{
switch (SERVICE_ACTION(cdb)) {
switch (SERVICE_ACTION32(cdb)) {
case READ_32:
case VERIFY_32:
case WRITE_32:
case WRITE_SAME_32:
return scsi_trace_rw32(p, cdb, len);
default:
return scsi_trace_misc(p, cdb, len);
@ -169,14 +259,23 @@ scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
case WRITE_6:
return scsi_trace_rw6(p, cdb, len);
case READ_10:
case VERIFY:
case WRITE_10:
case WRITE_SAME:
return scsi_trace_rw10(p, cdb, len);
case READ_12:
case VERIFY_12:
case WRITE_12:
return scsi_trace_rw12(p, cdb, len);
case READ_16:
case VERIFY_16:
case WRITE_16:
case WRITE_SAME_16:
return scsi_trace_rw16(p, cdb, len);
case UNMAP:
return scsi_trace_unmap(p, cdb, len);
case SERVICE_ACTION_IN:
return scsi_trace_service_action_in(p, cdb, len);
case VARIABLE_LENGTH_CMD:
return scsi_trace_varlen(p, cdb, len);
default:

33
include/trace/events/scsi.h
View File

@ -200,6 +200,8 @@ TRACE_EVENT(scsi_dispatch_cmd_start,
__field( unsigned int, lun )
__field( unsigned int, opcode )
__field( unsigned int, cmd_len )
__field( unsigned int, data_sglen )
__field( unsigned int, prot_sglen )
__dynamic_array(unsigned char, cmnd, cmd->cmd_len)
),
@ -210,12 +212,16 @@ TRACE_EVENT(scsi_dispatch_cmd_start,
__entry->lun = cmd->device->lun;
__entry->opcode = cmd->cmnd[0];
__entry->cmd_len = cmd->cmd_len;
__entry->data_sglen = scsi_sg_count(cmd);
__entry->prot_sglen = scsi_prot_sg_count(cmd);
memcpy(__get_dynamic_array(cmnd), cmd->cmnd, cmd->cmd_len);
),
TP_printk("host_no=%u channel=%u id=%u lun=%u cmnd=(%s %s raw=%s)",
TP_printk("host_no=%u channel=%u id=%u lun=%u data_sgl=%u prot_sgl=%u" \
" cmnd=(%s %s raw=%s)",
__entry->host_no, __entry->channel, __entry->id,
__entry->lun, show_opcode_name(__entry->opcode),
__entry->lun, __entry->data_sglen, __entry->prot_sglen,
show_opcode_name(__entry->opcode),
__parse_cdb(__get_dynamic_array(cmnd), __entry->cmd_len),
__print_hex(__get_dynamic_array(cmnd), __entry->cmd_len))
);
@ -234,6 +240,8 @@ TRACE_EVENT(scsi_dispatch_cmd_error,
__field( int, rtn )
__field( unsigned int, opcode )
__field( unsigned int, cmd_len )
__field( unsigned int, data_sglen )
__field( unsigned int, prot_sglen )
__dynamic_array(unsigned char, cmnd, cmd->cmd_len)
),
@ -245,13 +253,16 @@ TRACE_EVENT(scsi_dispatch_cmd_error,
__entry->rtn = rtn;
__entry->opcode = cmd->cmnd[0];
__entry->cmd_len = cmd->cmd_len;
__entry->data_sglen = scsi_sg_count(cmd);
__entry->prot_sglen = scsi_prot_sg_count(cmd);
memcpy(__get_dynamic_array(cmnd), cmd->cmnd, cmd->cmd_len);
),
TP_printk("host_no=%u channel=%u id=%u lun=%u cmnd=(%s %s raw=%s)"
" rtn=%d",
TP_printk("host_no=%u channel=%u id=%u lun=%u data_sgl=%u prot_sgl=%u" \
" cmnd=(%s %s raw=%s) rtn=%d",
__entry->host_no, __entry->channel, __entry->id,
__entry->lun, show_opcode_name(__entry->opcode),
__entry->lun, __entry->data_sglen, __entry->prot_sglen,
show_opcode_name(__entry->opcode),
__parse_cdb(__get_dynamic_array(cmnd), __entry->cmd_len),
__print_hex(__get_dynamic_array(cmnd), __entry->cmd_len),
__entry->rtn)
@ -271,6 +282,8 @@ DECLARE_EVENT_CLASS(scsi_cmd_done_timeout_template,
__field( int, result )
__field( unsigned int, opcode )
__field( unsigned int, cmd_len )
__field( unsigned int, data_sglen )
__field( unsigned int, prot_sglen )
__dynamic_array(unsigned char, cmnd, cmd->cmd_len)
),
@ -282,13 +295,17 @@ DECLARE_EVENT_CLASS(scsi_cmd_done_timeout_template,
__entry->result = cmd->result;
__entry->opcode = cmd->cmnd[0];
__entry->cmd_len = cmd->cmd_len;
__entry->data_sglen = scsi_sg_count(cmd);
__entry->prot_sglen = scsi_prot_sg_count(cmd);
memcpy(__get_dynamic_array(cmnd), cmd->cmnd, cmd->cmd_len);
),
TP_printk("host_no=%u channel=%u id=%u lun=%u cmnd=(%s %s raw=%s) "
"result=(driver=%s host=%s message=%s status=%s)",
TP_printk("host_no=%u channel=%u id=%u lun=%u data_sgl=%u " \
"prot_sgl=%u cmnd=(%s %s raw=%s) result=(driver=%s host=%s " \
"message=%s status=%s)",
__entry->host_no, __entry->channel, __entry->id,
__entry->lun, show_opcode_name(__entry->opcode),
__entry->lun, __entry->data_sglen, __entry->prot_sglen,
show_opcode_name(__entry->opcode),
__parse_cdb(__get_dynamic_array(cmnd), __entry->cmd_len),
__print_hex(__get_dynamic_array(cmnd), __entry->cmd_len),
show_driverbyte_name(((__entry->result) >> 24) & 0xff),