2 * collectd - src/ipc.c, based on src/memcached.c
3 * Copyright (C) 2010 Andres J. Diaz <ajdiaz@connectical.com>
4 * Copyright (C) 2010 Manuel L. Sanmartin <manuel.luis@gmail.com>
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 * Andres J. Diaz <ajdiaz@connectical.com>
22 * Manuel L. Sanmartin <manuel.luis@gmail>
25 /* Many of this code is based on busybox ipc implementation, which is:
26 * (C) Rodney Radford <rradford@mindspring.com> and distributed under GPLv2.
35 /* _GNU_SOURCE is needed for struct shm_info.used_ids on musl libc */
38 /* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
39 /* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
40 /* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
41 # include <sys/types.h>
47 /* For older kernels the same holds for the defines below */
58 ulong shm_tot; /* total allocated shm */
59 ulong shm_rss; /* total resident shm */
60 ulong shm_swp; /* total swapped shm */
71 /* The last arg of semctl is a union semun, but where is it defined?
72 X/OPEN tells us to define it ourselves, but until recently
73 Linux include files would also define it. */
74 # if defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
75 /* union semun is defined by including <sys/sem.h> */
77 /* according to X/OPEN we have to define it ourselves */
81 unsigned short *array;
82 struct seminfo *__buf;
85 static long pagesize_g;
86 /* #endif KERNEL_LINUX */
88 # include <sys/ipc_info.h>
89 /* #endif KERNEL_AIX */
91 # error "No applicable input method."
94 __attribute__ ((nonnull(1)))
95 static void ipc_submit_g (const char *plugin_instance,
97 const char *type_instance,
98 gauge_t value) /* {{{ */
100 value_list_t vl = VALUE_LIST_INIT;
102 vl.values = &(value_t) { .gauge = value };
104 sstrncpy (vl.plugin, "ipc", sizeof (vl.plugin));
105 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
106 sstrncpy (vl.type, type, sizeof (vl.type));
107 if (type_instance != NULL)
108 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
110 plugin_dispatch_values (&vl);
114 static int ipc_read_sem (void) /* {{{ */
116 struct seminfo seminfo;
120 arg.array = (void *) &seminfo;
122 status = semctl (/* id = */ 0, /* num = */ 0, SEM_INFO, arg);
126 ERROR("ipc plugin: semctl(2) failed: %s. "
127 "Maybe the kernel is not configured for semaphores?",
128 sstrerror (errno, errbuf, sizeof (errbuf)));
132 ipc_submit_g("sem", "count", "arrays", seminfo.semusz);
133 ipc_submit_g("sem", "count", "total", seminfo.semaem);
136 } /* }}} int ipc_read_sem */
138 static int ipc_read_shm (void) /* {{{ */
140 struct shm_info shm_info;
143 status = shmctl (/* id = */ 0, SHM_INFO, (void *) &shm_info);
147 ERROR("ipc plugin: shmctl(2) failed: %s. "
148 "Maybe the kernel is not configured for shared memory?",
149 sstrerror (errno, errbuf, sizeof (errbuf)));
153 ipc_submit_g("shm", "segments", NULL, shm_info.used_ids);
154 ipc_submit_g("shm", "bytes", "total", shm_info.shm_tot * pagesize_g);
155 ipc_submit_g("shm", "bytes", "rss", shm_info.shm_rss * pagesize_g);
156 ipc_submit_g("shm", "bytes", "swapped", shm_info.shm_swp * pagesize_g);
159 /* }}} int ipc_read_shm */
161 static int ipc_read_msg (void) /* {{{ */
163 struct msginfo msginfo;
165 if ( msgctl(0, MSG_INFO, (struct msqid_ds *) (void *) &msginfo) < 0 )
167 ERROR("Kernel is not configured for message queues");
170 ipc_submit_g("msg", "count", "queues", msginfo.msgmni);
171 ipc_submit_g("msg", "count", "headers", msginfo.msgmap);
172 ipc_submit_g("msg", "count", "space", msginfo.msgtql);
176 /* }}} int ipc_read_msg */
178 static int ipc_init (void) /* {{{ */
180 pagesize_g = sysconf(_SC_PAGESIZE);
184 /* #endif KERNEL_LINUX */
187 static caddr_t ipc_get_info (cid_t cid, int cmd, int version, int stsize, int *nmemb) /* {{{ */
192 if (get_ipc_info(cid, cmd, version, buff, &size) < 0)
194 if (errno != ENOSPC) {
196 WARNING ("ipc plugin: get_ipc_info: %s",
197 sstrerror (errno, errbuf, sizeof (errbuf)));
206 ERROR ("ipc plugin: ipc_get_info: missmatch struct size and buffer size");
210 *nmemb = size / stsize;
212 buff = malloc (size);
214 ERROR ("ipc plugin: ipc_get_info malloc failed.");
218 if (get_ipc_info(cid, cmd, version, buff, &size) < 0)
221 WARNING ("ipc plugin: get_ipc_info: %s",
222 sstrerror (errno, errbuf, sizeof (errbuf)));
230 static int ipc_read_sem (void) /* {{{ */
232 ipcinfo_sem_t *ipcinfo_sem;
233 unsigned short sem_nsems=0;
234 unsigned short sems=0;
237 ipcinfo_sem = (ipcinfo_sem_t *)ipc_get_info(0,
238 GET_IPCINFO_SEM_ALL, IPCINFO_SEM_VERSION, sizeof(ipcinfo_sem_t), &n);
239 if (ipcinfo_sem == NULL)
242 for (int i=0; i<n; i++) {
243 sem_nsems += ipcinfo_sem[i].sem_nsems;
248 ipc_submit_g("sem", "count", "arrays", sem_nsems);
249 ipc_submit_g("sem", "count", "total", sems);
252 } /* }}} int ipc_read_sem */
254 static int ipc_read_shm (void) /* {{{ */
256 ipcinfo_shm_t *ipcinfo_shm;
258 unsigned int shm_segments=0;
259 size64_t shm_bytes=0;
262 ipcinfo_shm = (ipcinfo_shm_t *)ipc_get_info(0,
263 GET_IPCINFO_SHM_ALL, IPCINFO_SHM_VERSION, sizeof(ipcinfo_shm_t), &n);
264 if (ipcinfo_shm == NULL)
267 for (int i=0, pshm=ipcinfo_shm; i<n; i++, pshm++) {
269 shm_bytes += pshm->shm_segsz;
273 ipc_submit_g("shm", "segments", NULL, shm_segments);
274 ipc_submit_g("shm", "bytes", "total", shm_bytes);
278 /* }}} int ipc_read_shm */
280 static int ipc_read_msg (void) /* {{{ */
282 ipcinfo_msg_t *ipcinfo_msg;
283 uint32_t msg_used_space=0;
284 uint32_t msg_alloc_queues=0;
285 msgqnum32_t msg_qnum=0;
288 ipcinfo_msg = (ipcinfo_msg_t *)ipc_get_info(0,
289 GET_IPCINFO_MSG_ALL, IPCINFO_MSG_VERSION, sizeof(ipcinfo_msg_t), &n);
290 if (ipcinfo_msg == NULL)
293 for (int i=0; i<n; i++) {
295 msg_used_space += ipcinfo_msg[i].msg_cbytes;
296 msg_qnum += ipcinfo_msg[i].msg_qnum;
300 ipc_submit_g("msg", "count", "queues", msg_alloc_queues);
301 ipc_submit_g("msg", "count", "headers", msg_qnum);
302 ipc_submit_g("msg", "count", "space", msg_used_space);
307 #endif /* KERNEL_AIX */
309 static int ipc_read (void) /* {{{ */
320 void module_register (void) /* {{{ */
323 plugin_register_init ("ipc", ipc_init);
325 plugin_register_read ("ipc", ipc_read);
329 /* vim: set sw=2 sts=2 et fdm=marker : */