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
40 #include "utils_avltree.h"
42 #define MAX_PROCFS_PATH 40
43 #define FRC2PCT(pp)(((float)(pp))/0x8000*100)
45 typedef struct zone_stats {
51 zone_compare(const void *a, const void *b)
53 if (*(const zoneid_t *)a == *(const zoneid_t *)b)
55 if (*(const zoneid_t *)a < *(const zoneid_t *)b)
61 zone_read_procfile(char const *pidstr, char const *name, void *buf, size_t bufsize)
65 char procfile[MAX_PROCFS_PATH];
66 (void)snprintf(procfile, sizeof(procfile), "/proc/%s/%s", pidstr, name);
67 if ((fd = open(procfile, O_RDONLY)) == -1) {
71 if (sread(fd, buf, bufsize) != 0) {
73 ERROR ("zone plugin: Reading \"%s\" failed: %s", procfile,
74 sstrerror (errno, errbuf, sizeof (errbuf)));
84 zone_submit_value(char *zone, gauge_t value)
86 value_list_t vl = VALUE_LIST_INIT;
89 values[0].gauge = value;
92 vl.values_len = 1; /*STATIC_ARRAY_SIZE (values);*/
93 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
94 sstrncpy (vl.plugin, "zone", sizeof (vl.plugin));
95 sstrncpy (vl.type, "percent", sizeof (vl.type));
96 sstrncpy (vl.type_instance, zone, sizeof (vl.type_instance));
98 return(plugin_dispatch_values (&vl));
101 static zone_stats_t *
102 zone_find_stats(c_avl_tree_t *tree, zoneid_t zoneid)
104 zone_stats_t *ret = NULL;
105 zoneid_t *key = NULL;
107 if (c_avl_get(tree, (void **)&zoneid, (void **)&ret)) {
108 if (!(ret = malloc(sizeof(*ret)))) {
109 WARNING("zone plugin: no memory");
112 if (!(key = malloc(sizeof(*key)))) {
113 WARNING("zone plugin: no memory");
118 if (c_avl_insert(tree, key, ret)) {
119 WARNING("zone plugin: error inserting into tree");
127 zone_submit_values(c_avl_tree_t *tree)
129 char zonename[ZONENAME_MAX];
130 zoneid_t *zoneid = NULL;
131 zone_stats_t *stats = NULL;
133 while (c_avl_pick (tree, (void **)&zoneid, (void **)&stats) == 0)
135 if (getzonenamebyid(*zoneid, zonename, sizeof( zonename )) == -1) {
136 WARNING("zone plugin: error retreiving zonename");
138 zone_submit_value(zonename, (gauge_t)FRC2PCT(stats->pctcpu));
146 static c_avl_tree_t *
147 zone_scandir(DIR *procdir)
155 if (!(tree=c_avl_create(zone_compare))) {
156 WARNING("zone plugin: Failed to create tree");
161 while ((direntp = readdir(procdir))) {
162 char const *pidstr = direntp->d_name;
163 if (pidstr[0] == '.') /* skip "." and ".." */
167 if (pid == 0 || pid == 2 || pid == 3)
168 continue; /* skip sched, pageout and fsflush */
170 if (zone_read_procfile(pidstr, "psinfo", &psinfo, sizeof(psinfo_t)) != 0)
173 stats = zone_find_stats(tree, psinfo.pr_zoneid);
175 stats->pctcpu += psinfo.pr_pctcpu;
176 stats->pctmem += psinfo.pr_pctmem;
182 static int zone_read (void)
187 if ((procdir = opendir("/proc")) == NULL) {
188 ERROR("zone plugin: cannot open /proc directory\n");
192 tree=zone_scandir(procdir);
197 zone_submit_values(tree); /* this also frees tree */
201 void module_register (void)
203 plugin_register_read ("zone", zone_read);
204 } /* void module_register */