2 * collectd - src/tape.c
3 * Copyright (C) 2005,2006 Scott Garrett
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.
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.
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
20 * Scott Garrett <sgarrett at technomancer.com>
29 #error "No applicable input method."
36 #define MAX_NUMTAPE 256
37 extern kstat_ctl_t *kc;
38 static kstat_t *ksp[MAX_NUMTAPE];
41 static int tape_init(void) {
49 for (numtape = 0, ksp_chain = kc->kc_chain;
50 (numtape < MAX_NUMTAPE) && (ksp_chain != NULL);
51 ksp_chain = ksp_chain->ks_next) {
52 if (strncmp(ksp_chain->ks_class, "tape", 4))
54 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
56 ksp[numtape++] = ksp_chain;
62 static void tape_submit(const char *plugin_instance, const char *type,
63 derive_t read, derive_t write) {
64 value_list_t vl = VALUE_LIST_INIT;
66 {.derive = read}, {.derive = write},
70 vl.values_len = STATIC_ARRAY_SIZE(values);
71 sstrncpy(vl.plugin, "tape", sizeof(vl.plugin));
72 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
73 sstrncpy(vl.type, type, sizeof(vl.type));
75 plugin_dispatch_values(&vl);
76 } /* void tape_submit */
78 static int tape_read(void) {
80 #if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
81 #define KIO_ROCTETS reads
82 #define KIO_WOCTETS writes
83 #define KIO_ROPS nreads
84 #define KIO_WOPS nwrites
85 #define KIO_RTIME rtime
86 #define KIO_WTIME wtime
87 #elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && \
89 #define KIO_ROCTETS nread
90 #define KIO_WOCTETS nwritten
91 #define KIO_ROPS reads
92 #define KIO_WOPS writes
93 #define KIO_RTIME rtime
94 #define KIO_WTIME wtime
96 #error "kstat_io_t does not have the required members"
98 static kstat_io_t kio;
106 for (int i = 0; i < numtape; i++) {
107 if (kstat_read(kc, ksp[i], &kio) == -1)
110 if (strncmp(ksp[i]->ks_class, "tape", 4) == 0) {
111 tape_submit(ksp[i]->ks_name, "tape_octets", kio.KIO_ROCTETS,
113 tape_submit(ksp[i]->ks_name, "tape_ops", kio.KIO_ROPS, kio.KIO_WOPS);
114 /* FIXME: Convert this to microseconds if necessary */
115 tape_submit(ksp[i]->ks_name, "tape_time", kio.KIO_RTIME, kio.KIO_WTIME);
122 void module_register(void) {
123 plugin_register_init("tape", tape_init);
124 plugin_register_read("tape", tape_read);