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[SCSI] add scsi trace core functions and put trace points

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Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
Signed-off-by: Kei Tokunaga <tokunaga.keiich@jp.fujitsu.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
This commit is contained in:
Kei Tokunaga
2010-04-01 20:41:40 +09:00
committed by James Bottomley
parent 5a2e399595
commit bf81623542
6 changed files with 525 additions and 0 deletions
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185
drivers/scsi/scsi_trace.c Normal file
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/*
* Copyright (C) 2010 FUJITSU LIMITED
* Copyright (C) 2010 Tomohiro Kusumi <kusumi.tomohiro@jp.fujitsu.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/kernel.h>
#include <linux/trace_seq.h>
#include <trace/events/scsi.h>
#define SERVICE_ACTION(cdb) ((cdb[8] << 8) | cdb[9])
static const char *
scsi_trace_misc(struct trace_seq *, unsigned char *, int);
static const char *
scsi_trace_rw6(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= ((cdb[1] & 0x1F) << 16);
lba |= (cdb[2] << 8);
lba |= cdb[3];
txlen = cdb[4];
trace_seq_printf(p, "lba=%llu txlen=%llu",
(unsigned long long)lba, (unsigned long long)txlen);
trace_seq_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw10(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= (cdb[2] << 24);
lba |= (cdb[3] << 16);
lba |= (cdb[4] << 8);
lba |= cdb[5];
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_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw12(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= (cdb[2] << 24);
lba |= (cdb[3] << 16);
lba |= (cdb[4] << 8);
lba |= cdb[5];
txlen |= (cdb[6] << 24);
txlen |= (cdb[7] << 16);
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_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw16(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
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];
txlen |= (cdb[10] << 24);
txlen |= (cdb[11] << 16);
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_putc(p, 0);
return ret;
}
static const char *
scsi_trace_rw32(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
sector_t lba = 0, txlen = 0;
lba |= ((u64)cdb[12] << 56);
lba |= ((u64)cdb[13] << 48);
lba |= ((u64)cdb[14] << 40);
lba |= ((u64)cdb[15] << 32);
lba |= (cdb[16] << 24);
lba |= (cdb[17] << 16);
lba |= (cdb[18] << 8);
lba |= cdb[19];
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_putc(p, 0);
return ret;
}
static const char *
scsi_trace_varlen(struct trace_seq *p, unsigned char *cdb, int len)
{
switch (SERVICE_ACTION(cdb)) {
case READ_32:
case WRITE_32:
return scsi_trace_rw32(p, cdb, len);
default:
return scsi_trace_misc(p, cdb, len);
}
}
static const char *
scsi_trace_misc(struct trace_seq *p, unsigned char *cdb, int len)
{
const char *ret = p->buffer + p->len;
trace_seq_printf(p, "-");
trace_seq_putc(p, 0);
return ret;
}
const char *
scsi_trace_parse_cdb(struct trace_seq *p, unsigned char *cdb, int len)
{
switch (cdb[0]) {
case READ_6:
case WRITE_6:
return scsi_trace_rw6(p, cdb, len);
case READ_10:
case WRITE_10:
return scsi_trace_rw10(p, cdb, len);
case READ_12:
case WRITE_12:
return scsi_trace_rw12(p, cdb, len);
case READ_16:
case WRITE_16:
return scsi_trace_rw16(p, cdb, len);
case VARIABLE_LENGTH_CMD:
return scsi_trace_varlen(p, cdb, len);
default:
return scsi_trace_misc(p, cdb, len);
}
}