1 /*
2 * Copyright (c) 2005 J. Martin Petersen
3 * Copyright (c) 2012 Willem Dijkstra
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * - Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
20 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
21 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 * POSSIBILITY OF SUCH DAMAGE.
29 *
30 */
31
32 /*
33 * nr of reads : nr of writes : seeks (zero) : read bytes : written bytes
34 */
35
36 #include "conf.h"
37
38 #include <sys/types.h>
39 #include <sys/param.h>
40 #include <stdlib.h>
41 #include <ctype.h>
42
43 #include <errno.h>
44 #include <string.h>
45 #include <fcntl.h>
46
47 #ifdef HAS_RESOURCE_CPUSTATE
48 #include <sys/resource.h>
49 #else
50 #include <sys/dkstat.h>
51 #endif
52
53 #include <devstat.h>
54
55 #include "error.h"
56 #include "symon.h"
57 #include "diskname.h"
58
59 static struct statinfo io_stats;
60 static int io_numdevs = 0;
61
62 void
privinit_io()63 privinit_io()
64 {
65 /* EMPTY */
66 }
67
68 void
init_io(struct stream * st)69 init_io(struct stream *st)
70 {
71 struct disknamectx c;
72 unsigned int i;
73 struct devstat *ds;
74 char drivename[MAX_PATH_LEN];
75
76 if (st->arg == NULL)
77 fatal("io: need a <device>|<devicename> argument");
78
79 io_stats.dinfo = malloc(sizeof(struct devinfo));
80 if (io_stats.dinfo == NULL) {
81 fatal("io: could not allocate memory");
82 }
83
84 io_stats.dinfo->mem_ptr = NULL;
85
86 initdisknamectx(&c, st->arg, drivename, MAX_PATH_LEN);
87
88 gets_io();
89
90 while (nextdiskname(&c)) {
91 for (i = 0; i < io_numdevs; i++) {
92 ds = &io_stats.dinfo->devices[i];
93
94 if (strncmp(ds->device_name, drivename, strlen(ds->device_name)) == 0 &&
95 strlen(ds->device_name) < strlen(drivename) &&
96 isdigit(st->arg[strlen(ds->device_name)]) &&
97 atoi(&drivename[strlen(ds->device_name)]) == ds->unit_number) {
98 if (strcmp(st->arg, drivename) == 0)
99 info("started module io(%.200s)", st->arg);
100 else
101 info("started module io(%.200s = %.200s)", st->arg, drivename);
102 return;
103 }
104 }
105 }
106
107 warning("io(%.200s): not found", st->arg);
108 }
109
110 void
gets_io()111 gets_io()
112 {
113 #if DEVSTAT_USER_API_VER >= 5
114 io_numdevs = devstat_getnumdevs(NULL);
115 #else
116 io_numdevs = getnumdevs();
117 #endif
118
119 if (io_numdevs == -1) {
120 fatal("io: numdevs error");
121 }
122
123 if (io_stats.dinfo->mem_ptr != NULL) {
124 free(io_stats.dinfo->mem_ptr);
125 }
126
127 /* clear the devinfo struct, as getdevs expects it to be all zeroes */
128 bzero(io_stats.dinfo, sizeof(struct devinfo));
129
130 #if DEVSTAT_USER_API_VER >= 5
131 devstat_getdevs(NULL, &io_stats);
132 #else
133 getdevs(&io_stats);
134 #endif
135 }
136
137 int
get_io(char * symon_buf,int maxlen,struct stream * st)138 get_io(char *symon_buf, int maxlen, struct stream *st)
139 {
140 unsigned int i;
141 struct devstat *ds;
142
143 for (i = 0; i < io_numdevs; i++) {
144 ds = &io_stats.dinfo->devices[i];
145
146 if (strncmp(ds->device_name, st->arg, strlen(ds->device_name)) == 0 &&
147 strlen(ds->device_name) < strlen(st->arg) &&
148 isdigit(st->arg[strlen(ds->device_name)]) &&
149 atoi(&st->arg[strlen(ds->device_name)]) == ds->unit_number) {
150 #if DEVSTAT_USER_API_VER >= 5
151 return snpack(symon_buf, maxlen, st->arg, MT_IO2,
152 ds->operations[DEVSTAT_READ],
153 ds->operations[DEVSTAT_WRITE],
154 (uint64_t) 0, /* don't know how to find #seeks */
155 ds->bytes[DEVSTAT_READ],
156 ds->bytes[DEVSTAT_WRITE]);
157
158 #else
159 return snpack(symon_buf, maxlen, st->arg, MT_IO2,
160 ds->num_reads,
161 ds->num_writes,
162 (uint64_t) 0, /* don't know how to find #seeks */
163 ds->bytes_read,
164 ds->bytes_written);
165 #endif
166 }
167 }
168
169 return 0;
170 }
171