1 /**
2 * collectd - src/tape.c
3 * Copyright (C) 2005 Scott Garrett
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Scott Garrett <sgarrett at technomancer.com>
21 **/
23 #include "tape.h"
25 #if COLLECT_TAPE
26 #define MODULE_NAME "tape"
28 #include "plugin.h"
29 #include "common.h"
31 #if defined(HAVE_LIBKSTAT)
32 #define MAX_NUMTAPE 256
33 extern kstat_ctl_t *kc;
34 static kstat_t *ksp[MAX_NUMTAPE];
35 static int numtape = 0;
36 #endif /* HAVE_LIBKSTAT */
38 static char *tape_filename_template = "tape-%s.rrd";
40 /* 104857600 == 100 MB */
41 static char *tape_ds_def[] =
42 {
43 "DS:rcount:COUNTER:25:0:U",
44 "DS:rmerged:COUNTER:25:0:U",
45 "DS:rbytes:COUNTER:25:0:U",
46 "DS:rtime:COUNTER:25:0:U",
47 "DS:wcount:COUNTER:25:0:U",
48 "DS:wmerged:COUNTER:25:0:U",
49 "DS:wbytes:COUNTER:25:0:U",
50 "DS:wtime:COUNTER:25:0:U",
51 NULL
52 };
53 static int tape_ds_num = 8;
55 extern time_t curtime;
57 void tape_init (void)
58 {
59 #ifdef HAVE_LIBKSTAT
60 kstat_t *ksp_chain;
62 numtape = 0;
64 if (kc == NULL)
65 return;
67 for (numtape = 0, ksp_chain = kc->kc_chain;
68 (numtape < MAX_NUMTAPE) && (ksp_chain != NULL);
69 ksp_chain = ksp_chain->ks_next)
70 {
71 if (strncmp (ksp_chain->ks_class, "tape", 4) )
72 continue;
73 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
74 continue;
75 ksp[numtape++] = ksp_chain;
76 }
77 #endif
79 return;
80 }
82 void tape_write (char *host, char *inst, char *val)
83 {
84 char file[512];
85 int status;
87 status = snprintf (file, 512, tape_filename_template, inst);
88 if (status < 1)
89 return;
90 else if (status >= 512)
91 return;
93 rrd_update_file (host, file, val, tape_ds_def, tape_ds_num);
94 }
97 #define BUFSIZE 512
98 void tape_submit (char *tape_name,
99 unsigned long long read_count,
100 unsigned long long read_merged,
101 unsigned long long read_bytes,
102 unsigned long long read_time,
103 unsigned long long write_count,
104 unsigned long long write_merged,
105 unsigned long long write_bytes,
106 unsigned long long write_time)
108 {
109 char buf[BUFSIZE];
111 if (snprintf (buf, BUFSIZE, "%u:%llu:%llu:%llu:%llu:%llu:%llu:%llu:%llu",
112 (unsigned int) curtime,
113 read_count, read_merged, read_bytes, read_time,
114 write_count, write_merged, write_bytes,
115 write_time) >= BUFSIZE)
116 return;
118 plugin_submit (MODULE_NAME, tape_name, buf);
119 }
121 #undef BUFSIZE
123 void tape_read (void)
124 {
126 #if defined(HAVE_LIBKSTAT)
127 static kstat_io_t kio;
128 int i;
130 if (kc == NULL)
131 return;
133 for (i = 0; i < numtape; i++)
134 {
135 if (kstat_read (kc, ksp[i], &kio) == -1)
136 continue;
138 if (strncmp (ksp[i]->ks_class, "tape", 4) == 0)
139 tape_submit (ksp[i]->ks_name,
140 kio.reads, 0LL, kio.nread, kio.rtime,
141 kio.writes, 0LL, kio.nwritten, kio.wtime);
142 }
143 #endif /* defined(HAVE_LIBKSTAT) */
144 }
146 void module_register (void)
147 {
148 plugin_register (MODULE_NAME, tape_init, tape_read, tape_write);
149 }
151 #undef MODULE_NAME
152 #endif /* COLLECT_TAPE */