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>
27 #if defined(HAVE_LIBKSTAT)
28 # define TAPE_HAVE_READ 1
30 # define TAPE_HAVE_READ 0
34 #if defined(HAVE_LIBKSTAT)
35 #define MAX_NUMTAPE 256
36 extern kstat_ctl_t *kc;
37 static kstat_t *ksp[MAX_NUMTAPE];
38 static int numtape = 0;
39 #endif /* HAVE_LIBKSTAT */
41 static int tape_init (void)
51 for (numtape = 0, ksp_chain = kc->kc_chain;
52 (numtape < MAX_NUMTAPE) && (ksp_chain != NULL);
53 ksp_chain = ksp_chain->ks_next)
55 if (strncmp (ksp_chain->ks_class, "tape", 4) )
57 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
59 ksp[numtape++] = ksp_chain;
66 static void tape_submit (const char *plugin_instance,
68 counter_t read, counter_t write)
71 value_list_t vl = VALUE_LIST_INIT;
73 values[0].counter = read;
74 values[1].counter = write;
78 vl.time = time (NULL);
79 strcpy (vl.host, hostname_g);
80 strcpy (vl.plugin, "tape");
81 strncpy (vl.plugin_instance, plugin_instance,
82 sizeof (vl.plugin_instance));
84 plugin_dispatch_values (type, &vl);
85 } /* void tape_submit */
87 static int tape_read (void)
90 #if defined(HAVE_LIBKSTAT)
91 # if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
92 # define KIO_ROCTETS reads
93 # define KIO_WOCTETS writes
94 # define KIO_ROPS nreads
95 # define KIO_WOPS nwrites
96 # define KIO_RTIME rtime
97 # define KIO_WTIME wtime
98 # elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
99 # define KIO_ROCTETS nread
100 # define KIO_WOCTETS nwritten
101 # define KIO_ROPS reads
102 # define KIO_WOPS writes
103 # define KIO_RTIME rtime
104 # define KIO_WTIME wtime
106 # error "kstat_io_t does not have the required members"
108 static kstat_io_t kio;
117 for (i = 0; i < numtape; i++)
119 if (kstat_read (kc, ksp[i], &kio) == -1)
122 if (strncmp (ksp[i]->ks_class, "tape", 4) == 0)
124 tape_submit (ksp[i]->ks_name, "tape_octets",
125 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
126 tape_submit (ksp[i]->ks_name, "tape_ops",
127 kio.KIO_ROPS, kio.KIO_WOPS);
128 /* FIXME: Convert this to microseconds if necessary */
129 tape_submit (ksp[i]->ks_name, "tape_time",
130 kio.KIO_RTIME, kio.KIO_WTIME);
133 #endif /* defined(HAVE_LIBKSTAT) */
137 #endif /* TAPE_HAVE_READ */
139 void module_register (void)
142 plugin_register_init ("tape", tape_init);
143 plugin_register_read ("tape", tape_read);
144 #endif /* TAPE_HAVE_READ */