1 /**
2 * collectd - src/tape.c
3 * Copyright (C) 2005,2006 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 "collectd.h"
25 #include "common.h"
26 #include "plugin.h"
28 #if !HAVE_LIBKSTAT
29 #error "No applicable input method."
30 #endif
32 #define MAX_NUMTAPE 256
33 extern kstat_ctl_t *kc;
34 static kstat_t *ksp[MAX_NUMTAPE];
35 static int numtape = 0;
37 static int tape_init(void) {
38 kstat_t *ksp_chain;
40 numtape = 0;
42 if (kc == NULL)
43 return (-1);
45 for (numtape = 0, ksp_chain = kc->kc_chain;
46 (numtape < MAX_NUMTAPE) && (ksp_chain != NULL);
47 ksp_chain = ksp_chain->ks_next) {
48 if (strncmp(ksp_chain->ks_class, "tape", 4))
49 continue;
50 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
51 continue;
52 ksp[numtape++] = ksp_chain;
53 }
55 return (0);
56 } /* int tape_init */
58 static void tape_submit(const char *plugin_instance, const char *type,
59 derive_t read, derive_t write) {
60 value_t values[2];
61 value_list_t vl = VALUE_LIST_INIT;
63 values[0].derive = read;
64 values[1].derive = write;
66 vl.values = values;
67 vl.values_len = 2;
68 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
69 sstrncpy(vl.plugin, "tape", sizeof(vl.plugin));
70 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
71 sstrncpy(vl.type, type, sizeof(vl.type));
73 plugin_dispatch_values(&vl);
74 } /* void tape_submit */
76 static int tape_read(void) {
78 #if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
79 #define KIO_ROCTETS reads
80 #define KIO_WOCTETS writes
81 #define KIO_ROPS nreads
82 #define KIO_WOPS nwrites
83 #define KIO_RTIME rtime
84 #define KIO_WTIME wtime
85 #elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && \
86 HAVE_KSTAT_IO_T_WTIME
87 #define KIO_ROCTETS nread
88 #define KIO_WOCTETS nwritten
89 #define KIO_ROPS reads
90 #define KIO_WOPS writes
91 #define KIO_RTIME rtime
92 #define KIO_WTIME wtime
93 #else
94 #error "kstat_io_t does not have the required members"
95 #endif
96 static kstat_io_t kio;
98 if (kc == NULL)
99 return (-1);
101 if (numtape <= 0)
102 return (-1);
104 for (int i = 0; i < numtape; i++) {
105 if (kstat_read(kc, ksp[i], &kio) == -1)
106 continue;
108 if (strncmp(ksp[i]->ks_class, "tape", 4) == 0) {
109 tape_submit(ksp[i]->ks_name, "tape_octets", kio.KIO_ROCTETS,
110 kio.KIO_WOCTETS);
111 tape_submit(ksp[i]->ks_name, "tape_ops", kio.KIO_ROPS, kio.KIO_WOPS);
112 /* FIXME: Convert this to microseconds if necessary */
113 tape_submit(ksp[i]->ks_name, "tape_time", kio.KIO_RTIME, kio.KIO_WTIME);
114 }
115 }
117 return (0);
118 }
120 void module_register(void) {
121 plugin_register_init("tape", tape_init);
122 plugin_register_read("tape", tape_read);
123 }