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// scsi tapset
// Copyright (C) 2005, 2006 IBM Corp.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
%{
#include <linux/types.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <linux/timer.h>
#include <linux/blkdev.h>
%}
/* mid-layer prepare a IO request */
probe scsi.ioentry
= module("scsi_mod").function("scsi_prep_fn@drivers/scsi/scsi_lib.c")?,
kernel.function("scsi_prep_fn@drivers/scsi/scsi_lib.c")?
{
if($req->rq_disk == 0) {
disk_major = -1
disk_minor = -1
} else {
disk_major = $req->rq_disk->major
disk_minor = $req->rq_disk->first_minor
}
device_state = get_devstate_from_req($q)
req_addr = $req
}
/* Dispatch a command to the low-level driver. */
probe scsi.iodispatching
= module("scsi_mod").function("scsi_dispatch_cmd@drivers/scsi/scsi.c")?,
kernel.function("scsi_dispatch_cmd@drivers/scsi/scsi.c")?
{
host_no = $cmd->device->host->host_no
channel = $cmd->device->channel
lun = $cmd->device->lun
dev_id = $cmd->device->id
device_state = $cmd->device->sdev_state
data_direction = $cmd->sc_data_direction
request_buffer = $cmd->request_buffer
request_bufflen = $cmd->request_bufflen
req_addr = $cmd->request
}
/* I/O is done by low-level driver*/
probe scsi.iodone
= module("scsi_mod").function("scsi_done@drivers/scsi/scsi.c")?,
kernel.function("scsi_done@drivers/scsi/scsi.c")?
{
host_no = $cmd->device->host->host_no
channel = $cmd->device->channel
lun = $cmd->device->lun
dev_id = $cmd->device->id
device_state = $cmd->device->sdev_state
data_direction = $cmd->sc_data_direction
req_addr = $cmd->request
scsi_timer_pending = scsi_timer_pending($cmd);
}
/* mid-layer processes the completed IO */
probe scsi.iocompleted
= module("scsi_mod").function("scsi_io_completion@drivers/scsi/scsi_lib.c")?,
kernel.function("scsi_io_completion@drivers/scsi/scsi_lib.c")?
{
host_no = $cmd->device->host->host_no
channel = $cmd->device->channel
lun = $cmd->device->lun
dev_id = $cmd->device->id
device_state = $cmd->device->sdev_state
data_direction = $cmd->sc_data_direction
req_addr = $cmd->request
goodbytes = $good_bytes
}
function scsi_timer_pending:long(var:long)
%{ /* pure */
struct scsi_cmnd *cmd = (struct scsi_cmnd *)((long)THIS->var);
THIS->__retvalue = timer_pending(&cmd->eh_timeout); /* FIXME: deref hazard! */
%}
function get_devstate_from_req:long(var:long)
%{ /* pure */
struct request_queue *q = (struct request_queue *)((long)THIS->var);
struct scsi_device *sdev = (struct scsi_device *)kread(&(q->queuedata));
THIS->__retvalue = kread(&(sdev->sdev_state));
CATCH_DEREF_FAULT();
%}
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