3 * Copyright (C) 2007 Peter Holik
4 * Copyright (C) 2011 Florian Forster
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 * Peter Holik <peter at holik.at>
28 #include "utils_ignorelist.h"
31 #error "No applicable input method."
35 * (Module-)Global variables
37 static const char *config_keys[] = {"Irq", "IgnoreSelected"};
38 static int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
40 static ignorelist_t *ignorelist = NULL;
45 static int irq_config(const char *key, const char *value) {
46 if (ignorelist == NULL)
47 ignorelist = ignorelist_create(/* invert = */ 1);
49 if (strcasecmp(key, "Irq") == 0) {
50 ignorelist_add(ignorelist, value);
51 } else if (strcasecmp(key, "IgnoreSelected") == 0) {
55 ignorelist_set_invert(ignorelist, invert);
63 static void irq_submit(const char *irq_name, derive_t value) {
65 value_list_t vl = VALUE_LIST_INIT;
67 if (ignorelist_match(ignorelist, irq_name) != 0)
70 values[0].derive = value;
74 sstrncpy(vl.host, hostname_g, sizeof(vl.host));
75 sstrncpy(vl.plugin, "irq", sizeof(vl.plugin));
76 sstrncpy(vl.type, "irq", sizeof(vl.type));
77 sstrncpy(vl.type_instance, irq_name, sizeof(vl.type_instance));
79 plugin_dispatch_values(&vl);
80 } /* void irq_submit */
82 static int irq_read(void) {
91 * 0: 2574 1 3 2 IO-APIC-edge timer
92 * 1: 102553 158669 218062 70587 IO-APIC-edge i8042
93 * 8: 0 0 0 1 IO-APIC-edge rtc0
95 fh = fopen("/proc/interrupts", "r");
98 ERROR("irq plugin: fopen (/proc/interrupts): %s",
99 sstrerror(errno, errbuf, sizeof(errbuf)));
103 /* Get CPU count from the first line */
104 if (fgets(buffer, sizeof(buffer), fh) != NULL) {
105 cpu_count = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
107 ERROR("irq plugin: unable to get CPU count from first line "
108 "of /proc/interrupts");
113 while (fgets(buffer, sizeof(buffer), fh) != NULL) {
119 int irq_values_to_parse;
121 fields_num = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
125 /* Parse this many numeric fields, skip the rest
126 * (+1 because first there is a name of irq in each line) */
127 if (fields_num >= cpu_count + 1)
128 irq_values_to_parse = cpu_count;
130 irq_values_to_parse = fields_num - 1;
132 /* First field is irq name and colon */
133 irq_name = fields[0];
134 irq_name_len = strlen(irq_name);
135 if (irq_name_len < 2)
138 /* Check if irq name ends with colon.
139 * Otherwise it's a header. */
140 if (irq_name[irq_name_len - 1] != ':')
143 /* Is it the the ARM fast interrupt (FIQ)? */
144 if (irq_name_len == 4 && (strncmp(irq_name, "FIQ:", 4) == 0))
147 irq_name[irq_name_len - 1] = 0;
151 for (i = 1; i <= irq_values_to_parse; i++) {
156 status = parse_value(fields[i], &v, DS_TYPE_DERIVE);
160 irq_value += v.derive;
163 /* No valid fields -> do not submit anything. */
167 irq_submit(irq_name, irq_value);
175 void module_register(void) {
176 plugin_register_config("irq", irq_config, config_keys, config_keys_num);
177 plugin_register_read("irq", irq_read);
178 } /* void module_register */