2 * collectd - src/zone.c
3 * Copyright (C) 2011 Mathijs Mohlmann
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; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Dagobert Michelsen (forward-porting)
27 /* avoid procfs.h error "Cannot use procfs in the large file compilation environment" */
28 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64
29 # undef _FILE_OFFSET_BITS
30 # undef _LARGEFILE64_SOURCE
37 #include <sys/types.h>
38 #include <sys/vm_usage.h>
42 #include "utils_avltree.h"
44 #define MAX_PROCFS_PATH 40
45 #define FRC2PCT(pp)(((float)(pp))/0x8000*100)
47 typedef struct zone_stats {
53 zone_compare(const zoneid_t *a, const zoneid_t *b)
63 zone_read_procfile(char const *pidstr, char const *name, void *buf, size_t bufsize)
67 char procfile[MAX_PROCFS_PATH];
68 (void)snprintf(procfile, sizeof(procfile), "/proc/%s/%s", pidstr, name);
69 if ((fd = open(procfile, O_RDONLY)) == -1) {
73 if (sread(fd, buf, bufsize) != 0) {
75 ERROR ("zone plugin: Reading \"%s\" failed: %s", procfile,
76 sstrerror (errno, errbuf, sizeof (errbuf)));
86 zone_submit_value(char *zone, gauge_t value)
88 value_list_t vl = VALUE_LIST_INIT;
91 values[0].gauge = value;
94 vl.values_len = 1; /*STATIC_ARRAY_SIZE (values);*/
95 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
96 sstrncpy (vl.plugin, "zone", sizeof (vl.plugin));
97 sstrncpy (vl.type, "percent", sizeof (vl.type));
98 sstrncpy (vl.type_instance, zone, sizeof (vl.type_instance));
100 return(plugin_dispatch_values (&vl));
103 static zone_stats_t *
104 zone_find_stats(c_avl_tree_t *tree, zoneid_t zoneid)
106 zone_stats_t *ret = NULL;
107 zoneid_t *key = NULL;
109 if (c_avl_get(tree, (void **)&zoneid, (void **)&ret)) {
110 if (!(ret = malloc(sizeof(*ret)))) {
111 WARNING("zone plugin: no memory");
114 if (!(key = malloc(sizeof(*key)))) {
115 WARNING("zone plugin: no memory");
120 if (c_avl_insert(tree, key, ret)) {
121 WARNING("zone plugin: error inserting into tree");
129 zone_submit_values(c_avl_tree_t *tree)
131 char zonename[ZONENAME_MAX];
132 zoneid_t *zoneid = NULL;
133 zone_stats_t *stats = NULL;
135 while (c_avl_pick (tree, (void **)&zoneid, (void **)&stats) == 0)
137 if (getzonenamebyid(*zoneid, zonename, sizeof( zonename )) == -1) {
138 WARNING("zone plugin: error retreiving zonename");
140 zone_submit_value(zonename, (gauge_t)FRC2PCT(stats->pctcpu));
148 static c_avl_tree_t *
149 zone_scandir(DIR *procdir)
157 if (!(tree=c_avl_create((void *) zone_compare))) {
158 WARNING("zone plugin: Failed to create tree");
163 while ((direntp = readdir(procdir))) {
164 char const *pidstr = direntp->d_name;
165 if (pidstr[0] == '.') /* skip "." and ".." */
169 if (pid == 0 || pid == 2 || pid == 3)
170 continue; /* skip sched, pageout and fsflush */
172 if (zone_read_procfile(pidstr, "psinfo", &psinfo, sizeof(psinfo_t)) != 0)
175 stats = zone_find_stats(tree, psinfo.pr_zoneid);
177 stats->pctcpu += psinfo.pr_pctcpu;
178 stats->pctmem += psinfo.pr_pctmem;
184 static int zone_read (void)
189 if ((procdir = opendir("/proc")) == NULL) {
190 ERROR("zone plugin: cannot open /proc directory\n");
194 tree=zone_scandir(procdir);
199 zone_submit_values(tree); /* this also frees tree */
203 void module_register (void)
205 plugin_register_read ("zone", zone_read);
206 } /* void module_register */