1 /**
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>
5 *
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.
10 *
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.
15 *
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
19 *
20 * Authors:
21 * Andres J. Diaz <ajdiaz@connectical.com>
22 * Manuel L. Sanmartin <manuel.luis@gmail>
23 **/
25 /* Many of this code is based on busybox ipc implementation, which is:
26 * (C) Rodney Radford <rradford@mindspring.com> and distributed under GPLv2.
27 */
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
32 #include "configfile.h"
34 #if KERNEL_LINUX
35 /* X/OPEN tells us to use <sys/{types,ipc,sem}.h> for semctl() */
36 /* X/OPEN tells us to use <sys/{types,ipc,msg}.h> for msgctl() */
37 /* X/OPEN tells us to use <sys/{types,ipc,shm}.h> for shmctl() */
38 # include <sys/types.h>
39 # include <sys/ipc.h>
40 # include <sys/sem.h>
41 # include <sys/msg.h>
42 # include <sys/shm.h>
44 /* For older kernels the same holds for the defines below */
45 # ifndef MSG_STAT
46 # define MSG_STAT 11
47 # define MSG_INFO 12
48 # endif
50 # ifndef SHM_STAT
51 # define SHM_STAT 13
52 # define SHM_INFO 14
53 struct shm_info {
54 int used_ids;
55 ulong shm_tot; /* total allocated shm */
56 ulong shm_rss; /* total resident shm */
57 ulong shm_swp; /* total swapped shm */
58 ulong swap_attempts;
59 ulong swap_successes;
60 };
61 # endif
63 # ifndef SEM_STAT
64 # define SEM_STAT 18
65 # define SEM_INFO 19
66 # endif
68 /* The last arg of semctl is a union semun, but where is it defined?
69 X/OPEN tells us to define it ourselves, but until recently
70 Linux include files would also define it. */
71 # if defined(__GNU_LIBRARY__) && !defined(_SEM_SEMUN_UNDEFINED)
72 /* union semun is defined by including <sys/sem.h> */
73 # else
74 /* according to X/OPEN we have to define it ourselves */
75 union semun {
76 int val;
77 struct semid_ds *buf;
78 unsigned short *array;
79 struct seminfo *__buf;
80 };
81 # endif
82 static long pagesize_g;
83 /* #endif KERNEL_LINUX */
84 #elif KERNEL_AIX
85 # include <sys/ipc_info.h>
86 /* #endif KERNEL_AIX */
87 #else
88 # error "No applicable input method."
89 #endif
91 __attribute__ ((nonnull(1)))
92 static void ipc_submit_g (const char *plugin_instance,
93 const char *type,
94 const char *type_instance,
95 gauge_t value) /* {{{ */
96 {
97 value_t values[1];
98 value_list_t vl = VALUE_LIST_INIT;
100 values[0].gauge = value;
102 vl.values = values;
103 vl.values_len = 1;
104 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
105 sstrncpy (vl.plugin, "ipc", sizeof (vl.plugin));
106 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
107 sstrncpy (vl.type, type, sizeof (vl.type));
108 if (type_instance != NULL)
109 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
111 plugin_dispatch_values (&vl);
112 } /* }}} */
114 #if KERNEL_AIX
115 static caddr_t ipc_get_info (cid_t cid, int cmd, int version, int stsize, int *nmemb) /* {{{ */
116 {
117 int size = 0;
118 caddr_t buff = NULL;
120 if (get_ipc_info(cid, cmd, version, buff, &size) < 0)
121 {
122 if (errno != ENOSPC) {
123 char errbuf[1024];
124 WARNING ("ipc plugin: get_ipc_info: %s",
125 sstrerror (errno, errbuf, sizeof (errbuf)));
126 return (NULL);
127 }
128 }
130 if (size == 0)
131 return NULL;
133 if (size % stsize) {
134 ERROR ("ipc plugin: ipc_get_info: missmatch struct size and buffer size");
135 return (NULL);
136 }
138 *nmemb = size / stsize;
140 buff = (caddr_t)malloc (size);
141 if (buff == NULL) {
142 ERROR ("ipc plugin: ipc_get_info malloc failed.");
143 return (NULL);
144 }
146 if (get_ipc_info(cid, cmd, version, buff, &size) < 0)
147 {
148 char errbuf[1024];
149 WARNING ("ipc plugin: get_ipc_info: %s",
150 sstrerror (errno, errbuf, sizeof (errbuf)));
151 free(buff);
152 return (NULL);
153 }
155 return buff;
156 } /* }}} */
157 #endif /* KERNEL_AIX */
159 static int ipc_read_sem (void) /* {{{ */
160 {
161 #if KERNEL_LINUX
162 struct seminfo seminfo;
163 union semun arg;
165 arg.array = (ushort *) (void *) &seminfo;
167 if ( semctl(0, 0, SEM_INFO, arg) < 0 )
168 {
169 ERROR("Kernel is not configured for semaphores");
170 return (-1);
171 }
173 ipc_submit_g("sem", "count", "arrays", seminfo.semusz);
174 ipc_submit_g("sem", "count", "total", seminfo.semaem);
176 /* #endif KERNEL_LINUX */
177 #elif KERNEL_AIX
178 ipcinfo_sem_t *ipcinfo_sem;
179 unsigned short sem_nsems=0;
180 unsigned short sems=0;
181 int i,n;
183 ipcinfo_sem = (ipcinfo_sem_t *)ipc_get_info(0,
184 GET_IPCINFO_SEM_ALL, IPCINFO_SEM_VERSION, sizeof(ipcinfo_sem_t), &n);
185 if (ipcinfo_sem == NULL)
186 return -1;
188 for (i=0; i<n; i++) {
189 sem_nsems += ipcinfo_sem[i].sem_nsems;
190 sems++;
191 }
192 free(ipcinfo_sem);
194 ipc_submit_g("sem", "count", "arrays", sem_nsems);
195 ipc_submit_g("sem", "count", "total", sems);
196 #endif /* KERNEL_AIX */
198 return (0);
199 }
200 /* }}} */
202 static int ipc_read_shm (void) /* {{{ */
203 {
204 #if KERNEL_LINUX
205 struct shm_info shm_info;
207 if ( shmctl(0, SHM_INFO, (struct shmid_ds *) (void *) &shm_info) < 0 )
208 {
209 ERROR("Kernel is not configured for shared memory");
210 return (-1);
211 }
212 ipc_submit_g("shm", "segments", NULL, shm_info.used_ids);
213 ipc_submit_g("shm", "bytes", "total", shm_info.shm_tot * pagesize_g);
214 ipc_submit_g("shm", "bytes", "rss", shm_info.shm_rss * pagesize_g);
215 ipc_submit_g("shm", "bytes", "swapped", shm_info.shm_swp * pagesize_g);
216 /* #endif KERNEL_LINUX */
217 #elif KERNEL_AIX
218 ipcinfo_shm_t *ipcinfo_shm;
219 ipcinfo_shm_t *pshm;
220 unsigned int shm_segments=0;
221 size64_t shm_bytes=0;
222 int i,n;
224 ipcinfo_shm = (ipcinfo_shm_t *)ipc_get_info(0,
225 GET_IPCINFO_SHM_ALL, IPCINFO_SHM_VERSION, sizeof(ipcinfo_shm_t), &n);
226 if (ipcinfo_shm == NULL)
227 return -1;
229 for (i=0, pshm=ipcinfo_shm; i<n; i++, pshm++) {
230 shm_segments++;
231 shm_bytes += pshm->shm_segsz;
232 }
233 free(ipcinfo_shm);
235 ipc_submit_g("shm", "segments", NULL, shm_segments);
236 ipc_submit_g("shm", "bytes", "total", shm_bytes);
238 #endif /* KERNEL_AIX */
239 return (0);
240 }
241 /* }}} */
243 static int ipc_read_msg (void) /* {{{ */
244 {
245 #if KERNEL_LINUX
246 struct msginfo msginfo;
248 if ( msgctl(0, MSG_INFO, (struct msqid_ds *) (void *) &msginfo) < 0 )
249 {
250 ERROR("Kernel is not configured for message queues");
251 return (-1);
252 }
253 ipc_submit_g("msg", "count", "queues", msginfo.msgmni);
254 ipc_submit_g("msg", "count", "headers", msginfo.msgmap);
255 ipc_submit_g("msg", "count", "space", msginfo.msgtql);
256 /* #endif KERNEL_LINUX */
257 #elif KERNEL_AIX
258 ipcinfo_msg_t *ipcinfo_msg;
259 uint32_t msg_used_space=0;
260 uint32_t msg_alloc_queues=0;
261 msgqnum32_t msg_qnum=0;
262 int i,n;
264 ipcinfo_msg = (ipcinfo_msg_t *)ipc_get_info(0,
265 GET_IPCINFO_MSG_ALL, IPCINFO_MSG_VERSION, sizeof(ipcinfo_msg_t), &n);
266 if (ipcinfo_msg == NULL)
267 return -1;
269 for (i=0; i<n; i++) {
270 msg_alloc_queues++;
271 msg_used_space += ipcinfo_msg[i].msg_cbytes;
272 msg_qnum += ipcinfo_msg[i].msg_qnum;
273 }
274 free(ipcinfo_msg);
276 ipc_submit_g("msg", "count", "queues", msg_alloc_queues);
277 ipc_submit_g("msg", "count", "headers", msg_qnum);
278 ipc_submit_g("msg", "count", "space", msg_used_space);
279 #endif /* KERNEL_AIX */
280 return (0);
281 }
282 /* }}} */
284 static int ipc_read (void) /* {{{ */
285 {
286 int x = 0;
287 x |= ipc_read_shm();
288 x |= ipc_read_sem();
289 x |= ipc_read_msg();
291 return (x);
292 }
293 /* }}} */
295 #ifdef KERNEL_LINUX
296 static int ipc_init (void) /* {{{ */
297 {
298 pagesize_g = sysconf(_SC_PAGESIZE);
299 return (0);
300 }
301 /* }}} */
302 #endif /* KERNEL_LINUX */
304 void module_register (void) /* {{{ */
305 {
306 #ifdef KERNEL_LINUX
307 plugin_register_init ("ipc", ipc_init);
308 #endif
309 plugin_register_read ("ipc", ipc_read);
310 }
311 /* }}} */
313 /* vim: set sw=2 sts=2 et fdm=marker : */