1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
|
// scsi tapset
// Copyright (C) 2005, 2006, 2009 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.
// <tapsetdescription>
// This family of probe points is used to probe SCSI activities.
// </tapsetdescription>
%{
#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>
%}
function describe_data_direction:string(state:long)
%{ /* pure */
switch ((long)THIS->state) {
case DMA_BIDIRECTIONAL: strlcpy(THIS->__retvalue, "BIDIRECTIONAL", MAXSTRINGLEN); break;
case DMA_TO_DEVICE: strlcpy(THIS->__retvalue, "TO_DEVICE", MAXSTRINGLEN); break;
case DMA_FROM_DEVICE: strlcpy(THIS->__retvalue, "FROM_DEVICE", MAXSTRINGLEN); break;
case DMA_NONE: strlcpy(THIS->__retvalue, "NONE", MAXSTRINGLEN); break;
default: strlcpy(THIS->__retvalue, "[INVALID]", MAXSTRINGLEN);
}
%}
function describe_device_state:string(state:long)
%{ /* pure */
switch ((long)THIS->state) {
case SDEV_CREATED: strlcpy(THIS->__retvalue, "CREATED", MAXSTRINGLEN); break;
case SDEV_RUNNING: strlcpy(THIS->__retvalue, "RUNNING", MAXSTRINGLEN); break;
case SDEV_CANCEL: strlcpy(THIS->__retvalue, "CANCEL", MAXSTRINGLEN); break;
case SDEV_DEL: strlcpy(THIS->__retvalue, "DEL", MAXSTRINGLEN); break;
case SDEV_QUIESCE: strlcpy(THIS->__retvalue, "QUIESCE", MAXSTRINGLEN); break;
case SDEV_OFFLINE: strlcpy(THIS->__retvalue, "OFFLINE", MAXSTRINGLEN); break;
#ifdef SDEV_BLOCK
case SDEV_BLOCK: strlcpy(THIS->__retvalue, "BLOCK", MAXSTRINGLEN); break;
#endif
#ifdef SDEV_CREATED_BLOCK
case SDEV_CREATED_BLOCK: strlcpy(THIS->__retvalue, "CREATED_BLOCK", MAXSTRINGLEN); break;
#endif
default: strlcpy(THIS->__retvalue, "[INVALID]", MAXSTRINGLEN);
}
%}
/**
* probe scsi.ioentry - Prepares a SCSI mid-layer request
* @disk_major: The major number of the disk (-1 if no information)
* @disk_minor: The minor number of the disk (-1 if no information)
* @device_state: The current state of the device
* @device_state_str: The current state of the device, as a string
*/
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)
device_state_str = describe_device_state(device_state)
req_addr = $req
}
/**
* probe scsi.iodispatching - SCSI mid-layer dispatched low-level SCSI command
* @host_no: The host number
* @channel: The channel number
* @lun: The lun number
* @dev_id: The scsi device id
* @device_state: The current state of the device
* @device_state_str: The current state of the device, as a string
* @data_direction: The data_direction specifies whether this command is from/to the device
* 0 (DMA_BIDIRECTIONAL), 1 (DMA_TO_DEVICE),
* 2 (DMA_FROM_DEVICE), 3 (DMA_NONE)
* @data_direction_str: Data direction, as a string
* @request_buffer: The request buffer address
* @request_bufflen: The request buffer length
*/
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
device_state_str = describe_device_state(device_state)
data_direction = $cmd->sc_data_direction
data_direction_str = describe_data_direction(data_direction)
request_buffer = (@defined($cmd->sdb->table->sgl)
? $cmd->sdb->table->sgl : $cmd->request_buffer)
request_bufflen = (@defined($cmd->sdb->length)
? $cmd->sdb->length : $cmd->request_bufflen)
req_addr = $cmd->request
}
/**
* probe scsi.iodone - SCSI command completed by low level driver and enqueued into the done queue.
* @host_no: The host number
* @channel: The channel number
* @lun: The lun number
* @dev_id: The scsi device id
* @device_state: The current state of the device
* @device_state_str: The current state of the device, as a string
* @data_direction: The data_direction specifies whether this command is
* from/to the device.
* @data_direction_str: Data direction, as a string
*/
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
device_state_str = describe_device_state(device_state)
data_direction = $cmd->sc_data_direction
data_direction_str = describe_data_direction(data_direction)
req_addr = $cmd->request
scsi_timer_pending = scsi_timer_pending($cmd);
}
/**
* probe scsi.iocompleted - SCSI mid-layer running the completion processing for block device I/O requests
* @host_no: The host number
* @channel: The channel number
* @lun: The lun number
* @dev_id: The scsi device id
* @device_state: The current state of the device
* @device_state_str: The current state of the device, as a string
* @data_direction: The data_direction specifies whether this command is from/to
* the device
* @data_direction_str: Data direction, as a string
* @goodbytes: The bytes completed
*/
// 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
device_state_str = describe_device_state(device_state)
data_direction = $cmd->sc_data_direction
data_direction_str = describe_data_direction(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);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,28)
THIS->__retvalue = timer_pending(&cmd->eh_timeout); /* FIXME: deref hazard! */
#else
struct request *req;
struct request_queue *rq;
req = (struct request *)kread(&cmd->request);
rq = (struct request_queue *)kread(&req->q);
THIS->__retvalue = timer_pending(&rq->timeout); /* FIXME: deref hazard! */
CATCH_DEREF_FAULT();
#endif
%}
function get_devstate_from_req:long(var:long)
{
sdev = @cast(var, "request_queue", "kernel:scsi_mod")->queuedata
return @cast(sdev, "scsi_device", "kernel:scsi_mod")->sdev_state
}
/**
* probe scsi.ioexecute - Create mid-layer SCSI request and wait for the result
* @host_no: The host number
* @channel: The channel number
* @lun: The lun number
* @dev_id: The scsi device id
* @device_state: The current state of the device
* @device_state_str: The current state of the device, as a string
* @data_direction: The data_direction specifies whether this command is
* from/to the device.
* @data_direction_str: Data direction, as a string
* @request_buffer: The data buffer address
* @request_bufflen: The data buffer buffer length
* @timeout: Request timeout in seconds
* @retries: Number of times to retry request
*/
probe scsi.ioexecute
= module("scsi_mod").function("scsi_execute@drivers/scsi/scsi_lib.c")!,
kernel.function("scsi_execute@drivers/scsi/scsi_lib.c")?
{
host_no = $sdev->host->host_no
channel = $sdev->channel
lun = $sdev->lun
dev_id = $sdev->id
device_state = $sdev->sdev_state
device_state_str = describe_device_state(device_state)
data_direction = $data_direction
data_direction_str = describe_data_direction(data_direction)
request_buffer = $buffer
request_bufflen = $bufflen
timeout = $timeout
retries = $retries
}
/**
* probe scsi.set_state - Order SCSI device state change
* @host_no: The host number
* @channel: The channel number
* @lun: The lun number
* @dev_id: The scsi device id
* @old_state: The current state of the device
* @old_state_str: The current state of the device, as a string
* @state: The new state of the device
* @state_str: The new state of the device, as a string
*/
probe scsi.set_state
= module("scsi_mod").function("scsi_device_set_state@drivers/scsi/scsi_lib.c")!,
kernel.function("scsi_device_set_state@drivers/scsi/scsi_lib.c")?
{
state = $state
state_str = describe_device_state(state)
host_no = $sdev->host->host_no
channel = $sdev->channel
lun = $sdev->lun
dev_id = $sdev->id
old_state = $sdev->sdev_state
old_state_str = describe_device_state(old_state)
}
|
