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"
24 #include "common.h"
25 #include "plugin.h"
27 #if !HAVE_LIBKSTAT
28 # error "No applicable input method."
29 #endif
31 #define MAX_NUMTAPE 256
32 extern kstat_ctl_t *kc;
33 static kstat_t *ksp[MAX_NUMTAPE];
34 static int numtape = 0;
36 static int tape_init (void)
37 {
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 {
49 if (strncmp (ksp_chain->ks_class, "tape", 4) )
50 continue;
51 if (ksp_chain->ks_type != KSTAT_TYPE_IO)
52 continue;
53 ksp[numtape++] = ksp_chain;
54 }
56 return (0);
57 } /* int tape_init */
59 static void tape_submit (const char *plugin_instance,
60 const char *type,
61 counter_t read, counter_t write)
62 {
63 value_t values[2];
64 value_list_t vl = VALUE_LIST_INIT;
66 values[0].counter = read;
67 values[1].counter = write;
69 vl.values = values;
70 vl.values_len = 2;
71 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
72 sstrncpy (vl.plugin, "tape", sizeof (vl.plugin));
73 sstrncpy (vl.plugin_instance, plugin_instance,
74 sizeof (vl.plugin_instance));
75 sstrncpy (vl.type, type, sizeof (vl.type));
77 plugin_dispatch_values (&vl);
78 } /* void tape_submit */
80 static int tape_read (void)
81 {
83 #if HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_NWRITES && HAVE_KSTAT_IO_T_WTIME
84 # define KIO_ROCTETS reads
85 # define KIO_WOCTETS writes
86 # define KIO_ROPS nreads
87 # define KIO_WOPS nwrites
88 # define KIO_RTIME rtime
89 # define KIO_WTIME wtime
90 #elif HAVE_KSTAT_IO_T_NWRITTEN && HAVE_KSTAT_IO_T_WRITES && HAVE_KSTAT_IO_T_WTIME
91 # define KIO_ROCTETS nread
92 # define KIO_WOCTETS nwritten
93 # define KIO_ROPS reads
94 # define KIO_WOPS writes
95 # define KIO_RTIME rtime
96 # define KIO_WTIME wtime
97 #else
98 # error "kstat_io_t does not have the required members"
99 #endif
100 static kstat_io_t kio;
101 int i;
103 if (kc == NULL)
104 return (-1);
106 if (numtape <= 0)
107 return (-1);
109 for (i = 0; i < numtape; i++)
110 {
111 if (kstat_read (kc, ksp[i], &kio) == -1)
112 continue;
114 if (strncmp (ksp[i]->ks_class, "tape", 4) == 0)
115 {
116 tape_submit (ksp[i]->ks_name, "tape_octets",
117 kio.KIO_ROCTETS, kio.KIO_WOCTETS);
118 tape_submit (ksp[i]->ks_name, "tape_ops",
119 kio.KIO_ROPS, kio.KIO_WOPS);
120 /* FIXME: Convert this to microseconds if necessary */
121 tape_submit (ksp[i]->ks_name, "tape_time",
122 kio.KIO_RTIME, kio.KIO_WTIME);
123 }
124 }
126 return (0);
127 }
129 void module_register (void)
130 {
131 plugin_register_init ("tape", tape_init);
132 plugin_register_read ("tape", tape_read);
133 }