1 /**
2 * collectd - src/vserver.c
3 * Copyright (C) 2006,2007 Sebastian Harl
4 * Copyright (C) 2007-2010 Florian octo Forster
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Sebastian Harl <sh at tokkee.org>
26 * Florian octo Forster <octo at collectd.org>
27 **/
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
33 #include <dirent.h>
34 #include <sys/types.h>
36 #define BUFSIZE 512
38 #define PROCDIR "/proc/virtual"
40 #if !KERNEL_LINUX
41 # error "No applicable input method."
42 #endif
44 static int pagesize = 0;
46 static int vserver_init (void)
47 {
48 /* XXX Should we check for getpagesize () in configure?
49 * What's the right thing to do, if there is no getpagesize ()? */
50 pagesize = getpagesize ();
52 return (0);
53 } /* static void vserver_init(void) */
55 static void traffic_submit (const char *plugin_instance,
56 const char *type_instance, derive_t rx, derive_t tx)
57 {
58 value_t values[2];
59 value_list_t vl = VALUE_LIST_INIT;
61 values[0].derive = rx;
62 values[1].derive = tx;
64 vl.values = values;
65 vl.values_len = STATIC_ARRAY_SIZE (values);
66 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
67 sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
68 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
69 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
70 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
72 plugin_dispatch_values (&vl);
73 } /* void traffic_submit */
75 static void load_submit (const char *plugin_instance,
76 gauge_t snum, gauge_t mnum, gauge_t lnum)
77 {
78 value_t values[3];
79 value_list_t vl = VALUE_LIST_INIT;
81 values[0].gauge = snum;
82 values[1].gauge = mnum;
83 values[2].gauge = lnum;
85 vl.values = values;
86 vl.values_len = STATIC_ARRAY_SIZE (values);
87 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
88 sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
89 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
90 sstrncpy (vl.type, "load", sizeof (vl.type));
92 plugin_dispatch_values (&vl);
93 }
95 static void submit_gauge (const char *plugin_instance, const char *type,
96 const char *type_instance, gauge_t value)
98 {
99 value_t values[1];
100 value_list_t vl = VALUE_LIST_INIT;
102 values[0].gauge = value;
104 vl.values = values;
105 vl.values_len = STATIC_ARRAY_SIZE (values);
106 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
107 sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
108 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
109 sstrncpy (vl.type, type, sizeof (vl.type));
110 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
112 plugin_dispatch_values (&vl);
113 } /* void submit_gauge */
115 static derive_t vserver_get_sock_bytes(const char *s)
116 {
117 value_t v;
118 int status;
120 while (s[0] != '/')
121 ++s;
123 /* Remove '/' */
124 ++s;
126 status = parse_value (s, &v, DS_TYPE_DERIVE);
127 if (status != 0)
128 return (-1);
129 return (v.derive);
130 }
132 static int vserver_read (void)
133 {
134 #if NAME_MAX < 1024
135 # define DIRENT_BUFFER_SIZE (sizeof (struct dirent) + 1024 + 1)
136 #else
137 # define DIRENT_BUFFER_SIZE (sizeof (struct dirent) + NAME_MAX + 1)
138 #endif
140 DIR *proc;
141 struct dirent *dent; /* 42 */
142 char dirent_buffer[DIRENT_BUFFER_SIZE];
144 errno = 0;
145 proc = opendir (PROCDIR);
146 if (proc == NULL)
147 {
148 char errbuf[1024];
149 ERROR ("vserver plugin: fopen (%s): %s", PROCDIR,
150 sstrerror (errno, errbuf, sizeof (errbuf)));
151 return (-1);
152 }
154 while (42)
155 {
156 int len;
157 char file[BUFSIZE];
159 FILE *fh;
160 char buffer[BUFSIZE];
162 struct stat statbuf;
163 char *cols[4];
165 int status;
167 status = readdir_r (proc, (struct dirent *) dirent_buffer, &dent);
168 if (status != 0)
169 {
170 char errbuf[4096];
171 ERROR ("vserver plugin: readdir_r failed: %s",
172 sstrerror (errno, errbuf, sizeof (errbuf)));
173 closedir (proc);
174 return (-1);
175 }
176 else if (dent == NULL)
177 {
178 /* end of directory */
179 break;
180 }
182 if (dent->d_name[0] == '.')
183 continue;
185 len = ssnprintf (file, sizeof (file), PROCDIR "/%s", dent->d_name);
186 if ((len < 0) || (len >= BUFSIZE))
187 continue;
189 status = stat (file, &statbuf);
190 if (status != 0)
191 {
192 char errbuf[4096];
193 WARNING ("vserver plugin: stat (%s) failed: %s",
194 file, sstrerror (errno, errbuf, sizeof (errbuf)));
195 continue;
196 }
198 if (!S_ISDIR (statbuf.st_mode))
199 continue;
201 /* socket message accounting */
202 len = ssnprintf (file, sizeof (file),
203 PROCDIR "/%s/cacct", dent->d_name);
204 if ((len < 0) || ((size_t) len >= sizeof (file)))
205 continue;
207 if (NULL == (fh = fopen (file, "r")))
208 {
209 char errbuf[1024];
210 ERROR ("Cannot open '%s': %s", file,
211 sstrerror (errno, errbuf, sizeof (errbuf)));
212 }
214 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
215 {
216 derive_t rx;
217 derive_t tx;
218 const char *type_instance;
220 if (strsplit (buffer, cols, 4) < 4)
221 continue;
223 if (0 == strcmp (cols[0], "UNIX:"))
224 type_instance = "unix";
225 else if (0 == strcmp (cols[0], "INET:"))
226 type_instance = "inet";
227 else if (0 == strcmp (cols[0], "INET6:"))
228 type_instance = "inet6";
229 else if (0 == strcmp (cols[0], "OTHER:"))
230 type_instance = "other";
231 else if (0 == strcmp (cols[0], "UNSPEC:"))
232 type_instance = "unspec";
233 else
234 continue;
236 rx = vserver_get_sock_bytes (cols[1]);
237 tx = vserver_get_sock_bytes (cols[2]);
238 /* cols[3] == errors */
240 traffic_submit (dent->d_name, type_instance, rx, tx);
241 } /* while (fgets) */
243 if (fh != NULL)
244 {
245 fclose (fh);
246 fh = NULL;
247 }
249 /* thread information and load */
250 len = ssnprintf (file, sizeof (file),
251 PROCDIR "/%s/cvirt", dent->d_name);
252 if ((len < 0) || ((size_t) len >= sizeof (file)))
253 continue;
255 if (NULL == (fh = fopen (file, "r")))
256 {
257 char errbuf[1024];
258 ERROR ("Cannot open '%s': %s", file,
259 sstrerror (errno, errbuf, sizeof (errbuf)));
260 }
262 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
263 {
264 int n = strsplit (buffer, cols, 4);
266 if (2 == n)
267 {
268 const char *type_instance;
269 gauge_t value;
271 if (0 == strcmp (cols[0], "nr_threads:"))
272 type_instance = "total";
273 else if (0 == strcmp (cols[0], "nr_running:"))
274 type_instance = "running";
275 else if (0 == strcmp (cols[0], "nr_unintr:"))
276 type_instance = "uninterruptable";
277 else if (0 == strcmp (cols[0], "nr_onhold:"))
278 type_instance = "onhold";
279 else
280 continue;
282 value = atof (cols[1]);
283 submit_gauge (dent->d_name, "vs_threads", type_instance, value);
284 }
285 else if (4 == n) {
286 if (0 == strcmp (cols[0], "loadavg:"))
287 {
288 gauge_t snum = atof (cols[1]);
289 gauge_t mnum = atof (cols[2]);
290 gauge_t lnum = atof (cols[3]);
291 load_submit (dent->d_name, snum, mnum, lnum);
292 }
293 }
294 } /* while (fgets) */
296 if (fh != NULL)
297 {
298 fclose (fh);
299 fh = NULL;
300 }
302 /* processes and memory usage */
303 len = ssnprintf (file, sizeof (file),
304 PROCDIR "/%s/limit", dent->d_name);
305 if ((len < 0) || ((size_t) len >= sizeof (file)))
306 continue;
308 if (NULL == (fh = fopen (file, "r")))
309 {
310 char errbuf[1024];
311 ERROR ("Cannot open '%s': %s", file,
312 sstrerror (errno, errbuf, sizeof (errbuf)));
313 }
315 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
316 {
317 const char *type = "vs_memory";
318 const char *type_instance;
319 gauge_t value;
321 if (strsplit (buffer, cols, 2) < 2)
322 continue;
324 if (0 == strcmp (cols[0], "PROC:"))
325 {
326 type = "vs_processes";
327 type_instance = "";
328 value = atof (cols[1]);
329 }
330 else
331 {
332 if (0 == strcmp (cols[0], "VM:"))
333 type_instance = "vm";
334 else if (0 == strcmp (cols[0], "VML:"))
335 type_instance = "vml";
336 else if (0 == strcmp (cols[0], "RSS:"))
337 type_instance = "rss";
338 else if (0 == strcmp (cols[0], "ANON:"))
339 type_instance = "anon";
340 else
341 continue;
343 value = atof (cols[1]) * pagesize;
344 }
346 submit_gauge (dent->d_name, type, type_instance, value);
347 } /* while (fgets) */
349 if (fh != NULL)
350 {
351 fclose (fh);
352 fh = NULL;
353 }
354 } /* while (readdir) */
356 closedir (proc);
358 return (0);
359 } /* int vserver_read */
361 void module_register (void)
362 {
363 plugin_register_init ("vserver", vserver_init);
364 plugin_register_read ("vserver", vserver_read);
365 } /* void module_register(void) */
367 /* vim: set ts=4 sw=4 noexpandtab : */