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
|
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "sg_io_linux.h"
/* Test code for D. Gilbert's extensions to the Linux OS SCSI generic ("sg")
device driver.
* Copyright (C) 1999-2006 D. Gilbert
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
This program send either device, bus or host resets to device,
or bus or host associated with the given sg device.
*/
#define ME "sg_reset: "
static char * version_str = "0.54 20061015";
#ifndef SG_SCSI_RESET
#define SG_SCSI_RESET 0x2284
#endif
#ifndef SG_SCSI_RESET_NOTHING
#define SG_SCSI_RESET_NOTHING 0
#define SG_SCSI_RESET_DEVICE 1
#define SG_SCSI_RESET_BUS 2
#define SG_SCSI_RESET_HOST 3
#endif
int main(int argc, char * argv[])
{
int sg_fd, res, k;
int do_device_reset = 0;
int do_bus_reset = 0;
int do_host_reset = 0;
char * file_name = 0;
for (k = 1; k < argc; ++k) {
if (0 == strcmp("-d", argv[k]))
do_device_reset = 1;
else if (0 == strcmp("-b", argv[k]))
do_bus_reset = 1;
else if (0 == strcmp("-h", argv[k]))
do_host_reset = 1;
else if (0 == strcmp("-V", argv[k])) {
fprintf(stderr, "Version string: %s\n", version_str);
exit(0);
} else if (*argv[k] == '-') {
printf("Unrecognized switch: %s\n", argv[k]);
file_name = 0;
break;
} else
file_name = argv[k];
}
if (0 == file_name) {
printf(
"Usage: 'sg_reset [-b] [-d] [-h] [-V] <scsi_device>'\n");
printf(" where: -b attempt a SCSI bus reset\n");
printf(" -d attempt a SCSI device reset\n");
printf(" -h attempt a host adapter reset\n");
printf(" -V print version string then exit\n\n");
printf(" {if no switch given then check if reset underway}\n");
printf("To reset use '-d' first, if that is unsuccessful, "
"then use '-b', then '-h'\n");
return 1;
}
sg_fd = open(file_name, O_RDWR | O_NONBLOCK);
if (sg_fd < 0) {
fprintf(stderr, ME "open error: %s: ", file_name);
perror("");
return 1;
}
k = SG_SCSI_RESET_NOTHING;
if (do_device_reset) {
printf(ME "starting device reset\n");
k = SG_SCSI_RESET_DEVICE;
}
else if (do_bus_reset) {
printf(ME "starting bus reset\n");
k = SG_SCSI_RESET_BUS;
}
else if (do_host_reset) {
printf(ME "starting host reset\n");
k = SG_SCSI_RESET_HOST;
}
res = ioctl(sg_fd, SG_SCSI_RESET, &k);
if (res < 0) {
if (EBUSY == errno)
printf(ME "BUSY, may be resetting now\n");
else if (EIO == errno)
printf(ME "requested type of reset may not be available\n");
else if (EACCES == errno)
printf(ME "reset requires CAP_SYS_ADMIN (root) "
"permission\n");
else if (EINVAL == errno)
printf(ME "SG_SCSI_RESET not supported\n");
else if (EIO == errno)
printf(ME "scsi_reset_provider() call failed\n");
else
perror(ME "SG_SCSI_RESET failed");
return 1;
}
if (SG_SCSI_RESET_NOTHING == k)
printf(ME "did nothing, device is normal mode\n");
else if (SG_SCSI_RESET_DEVICE == k)
printf(ME "completed device reset\n");
else if (SG_SCSI_RESET_BUS == k)
printf(ME "completed bus reset\n");
else if (SG_SCSI_RESET_HOST == k)
printf(ME "completed host reset\n");
if (close(sg_fd) < 0) {
perror(ME "close error");
return 1;
}
return 0;
}
|
