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[] =
42 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
44 static ignorelist_t *ignorelist = NULL;
49 static int irq_config (const char *key, const char *value)
51 if (ignorelist == NULL)
52 ignorelist = ignorelist_create (/* invert = */ 1);
54 if (strcasecmp (key, "Irq") == 0)
56 ignorelist_add (ignorelist, value);
58 else if (strcasecmp (key, "IgnoreSelected") == 0)
63 ignorelist_set_invert (ignorelist, invert);
73 static void irq_submit (const char *irq_name, derive_t value)
75 value_list_t vl = VALUE_LIST_INIT;
77 if (ignorelist_match (ignorelist, irq_name) != 0)
80 vl.values = &(value_t) { .derive = value };
82 sstrncpy (vl.plugin, "irq", sizeof (vl.plugin));
83 sstrncpy (vl.type, "irq", sizeof (vl.type));
84 sstrncpy (vl.type_instance, irq_name, sizeof (vl.type_instance));
86 plugin_dispatch_values (&vl);
87 } /* void irq_submit */
89 static int irq_read (void)
99 * 0: 2574 1 3 2 IO-APIC-edge timer
100 * 1: 102553 158669 218062 70587 IO-APIC-edge i8042
101 * 8: 0 0 0 1 IO-APIC-edge rtc0
103 fh = fopen ("/proc/interrupts", "r");
107 ERROR ("irq plugin: fopen (/proc/interrupts): %s",
108 sstrerror (errno, errbuf, sizeof (errbuf)));
112 /* Get CPU count from the first line */
113 if(fgets (buffer, sizeof (buffer), fh) != NULL) {
114 cpu_count = strsplit (buffer, fields,
115 STATIC_ARRAY_SIZE (fields));
117 ERROR ("irq plugin: unable to get CPU count from first line "
118 "of /proc/interrupts");
123 while (fgets (buffer, sizeof (buffer), fh) != NULL)
130 int irq_values_to_parse;
132 fields_num = strsplit (buffer, fields,
133 STATIC_ARRAY_SIZE (fields));
137 /* Parse this many numeric fields, skip the rest
138 * (+1 because first there is a name of irq in each line) */
139 if (fields_num >= cpu_count + 1)
140 irq_values_to_parse = cpu_count;
142 irq_values_to_parse = fields_num - 1;
144 /* First field is irq name and colon */
145 irq_name = fields[0];
146 irq_name_len = strlen (irq_name);
147 if (irq_name_len < 2)
150 /* Check if irq name ends with colon.
151 * Otherwise it's a header. */
152 if (irq_name[irq_name_len - 1] != ':')
155 /* Is it the the ARM fast interrupt (FIQ)? */
156 if (irq_name_len == 4 && (strncmp(irq_name, "FIQ:", 4) == 0))
159 irq_name[irq_name_len - 1] = 0;
163 for (i = 1; i <= irq_values_to_parse; i++)
169 status = parse_value (fields[i], &v, DS_TYPE_DERIVE);
173 irq_value += v.derive;
176 /* No valid fields -> do not submit anything. */
180 irq_submit (irq_name, irq_value);
188 void module_register (void)
190 plugin_register_config ("irq", irq_config,
191 config_keys, config_keys_num);
192 plugin_register_read ("irq", irq_read);
193 } /* void module_register */