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"
31 #include "common.h"
32 #include "plugin.h"
34 #include <dirent.h>
35 #include <sys/types.h>
37 #define BUFSIZE 512
39 #define PROCDIR "/proc/virtual"
41 #if !KERNEL_LINUX
42 # error "No applicable input method."
43 #endif
45 static int pagesize = 0;
47 static int vserver_init (void)
48 {
49 /* XXX Should we check for getpagesize () in configure?
50 * What's the right thing to do, if there is no getpagesize ()? */
51 pagesize = getpagesize ();
53 return (0);
54 } /* static void vserver_init(void) */
56 static void traffic_submit (const char *plugin_instance,
57 const char *type_instance, derive_t rx, derive_t tx)
58 {
59 value_t values[2];
60 value_list_t vl = VALUE_LIST_INIT;
62 values[0].derive = rx;
63 values[1].derive = tx;
65 vl.values = values;
66 vl.values_len = STATIC_ARRAY_SIZE (values);
67 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
68 sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
69 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
70 sstrncpy (vl.type, "if_octets", sizeof (vl.type));
71 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
73 plugin_dispatch_values (&vl);
74 } /* void traffic_submit */
76 static void load_submit (const char *plugin_instance,
77 gauge_t snum, gauge_t mnum, gauge_t lnum)
78 {
79 value_t values[3];
80 value_list_t vl = VALUE_LIST_INIT;
82 values[0].gauge = snum;
83 values[1].gauge = mnum;
84 values[2].gauge = lnum;
86 vl.values = values;
87 vl.values_len = STATIC_ARRAY_SIZE (values);
88 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
89 sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
90 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
91 sstrncpy (vl.type, "load", sizeof (vl.type));
93 plugin_dispatch_values (&vl);
94 }
96 static void submit_gauge (const char *plugin_instance, const char *type,
97 const char *type_instance, gauge_t value)
99 {
100 value_t values[1];
101 value_list_t vl = VALUE_LIST_INIT;
103 values[0].gauge = value;
105 vl.values = values;
106 vl.values_len = STATIC_ARRAY_SIZE (values);
107 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
108 sstrncpy (vl.plugin, "vserver", sizeof (vl.plugin));
109 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
110 sstrncpy (vl.type, type, sizeof (vl.type));
111 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
113 plugin_dispatch_values (&vl);
114 } /* void submit_gauge */
116 static derive_t vserver_get_sock_bytes(const char *s)
117 {
118 value_t v;
119 int status;
121 while (s[0] != '/')
122 ++s;
124 /* Remove '/' */
125 ++s;
127 status = parse_value (s, &v, DS_TYPE_DERIVE);
128 if (status != 0)
129 return (-1);
130 return (v.derive);
131 }
133 static int vserver_read (void)
134 {
135 #if NAME_MAX < 1024
136 # define DIRENT_BUFFER_SIZE (sizeof (struct dirent) + 1024 + 1)
137 #else
138 # define DIRENT_BUFFER_SIZE (sizeof (struct dirent) + NAME_MAX + 1)
139 #endif
141 DIR *proc;
142 struct dirent *dent; /* 42 */
143 char dirent_buffer[DIRENT_BUFFER_SIZE];
145 errno = 0;
146 proc = opendir (PROCDIR);
147 if (proc == NULL)
148 {
149 char errbuf[1024];
150 ERROR ("vserver plugin: fopen (%s): %s", PROCDIR,
151 sstrerror (errno, errbuf, sizeof (errbuf)));
152 return (-1);
153 }
155 while (42)
156 {
157 int len;
158 char file[BUFSIZE];
160 FILE *fh;
161 char buffer[BUFSIZE];
163 struct stat statbuf;
164 char *cols[4];
166 int status;
168 status = readdir_r (proc, (struct dirent *) dirent_buffer, &dent);
169 if (status != 0)
170 {
171 char errbuf[4096];
172 ERROR ("vserver plugin: readdir_r failed: %s",
173 sstrerror (errno, errbuf, sizeof (errbuf)));
174 closedir (proc);
175 return (-1);
176 }
177 else if (dent == NULL)
178 {
179 /* end of directory */
180 break;
181 }
183 if (dent->d_name[0] == '.')
184 continue;
186 len = ssnprintf (file, sizeof (file), PROCDIR "/%s", dent->d_name);
187 if ((len < 0) || (len >= BUFSIZE))
188 continue;
190 status = stat (file, &statbuf);
191 if (status != 0)
192 {
193 char errbuf[4096];
194 WARNING ("vserver plugin: stat (%s) failed: %s",
195 file, sstrerror (errno, errbuf, sizeof (errbuf)));
196 continue;
197 }
199 if (!S_ISDIR (statbuf.st_mode))
200 continue;
202 /* socket message accounting */
203 len = ssnprintf (file, sizeof (file),
204 PROCDIR "/%s/cacct", dent->d_name);
205 if ((len < 0) || ((size_t) len >= sizeof (file)))
206 continue;
208 if (NULL == (fh = fopen (file, "r")))
209 {
210 char errbuf[1024];
211 ERROR ("Cannot open '%s': %s", file,
212 sstrerror (errno, errbuf, sizeof (errbuf)));
213 }
215 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
216 {
217 derive_t rx;
218 derive_t tx;
219 const char *type_instance;
221 if (strsplit (buffer, cols, 4) < 4)
222 continue;
224 if (0 == strcmp (cols[0], "UNIX:"))
225 type_instance = "unix";
226 else if (0 == strcmp (cols[0], "INET:"))
227 type_instance = "inet";
228 else if (0 == strcmp (cols[0], "INET6:"))
229 type_instance = "inet6";
230 else if (0 == strcmp (cols[0], "OTHER:"))
231 type_instance = "other";
232 else if (0 == strcmp (cols[0], "UNSPEC:"))
233 type_instance = "unspec";
234 else
235 continue;
237 rx = vserver_get_sock_bytes (cols[1]);
238 tx = vserver_get_sock_bytes (cols[2]);
239 /* cols[3] == errors */
241 traffic_submit (dent->d_name, type_instance, rx, tx);
242 } /* while (fgets) */
244 if (fh != NULL)
245 {
246 fclose (fh);
247 fh = NULL;
248 }
250 /* thread information and load */
251 len = ssnprintf (file, sizeof (file),
252 PROCDIR "/%s/cvirt", dent->d_name);
253 if ((len < 0) || ((size_t) len >= sizeof (file)))
254 continue;
256 if (NULL == (fh = fopen (file, "r")))
257 {
258 char errbuf[1024];
259 ERROR ("Cannot open '%s': %s", file,
260 sstrerror (errno, errbuf, sizeof (errbuf)));
261 }
263 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
264 {
265 int n = strsplit (buffer, cols, 4);
267 if (2 == n)
268 {
269 const char *type_instance;
270 gauge_t value;
272 if (0 == strcmp (cols[0], "nr_threads:"))
273 type_instance = "total";
274 else if (0 == strcmp (cols[0], "nr_running:"))
275 type_instance = "running";
276 else if (0 == strcmp (cols[0], "nr_unintr:"))
277 type_instance = "uninterruptable";
278 else if (0 == strcmp (cols[0], "nr_onhold:"))
279 type_instance = "onhold";
280 else
281 continue;
283 value = atof (cols[1]);
284 submit_gauge (dent->d_name, "vs_threads", type_instance, value);
285 }
286 else if (4 == n) {
287 if (0 == strcmp (cols[0], "loadavg:"))
288 {
289 gauge_t snum = atof (cols[1]);
290 gauge_t mnum = atof (cols[2]);
291 gauge_t lnum = atof (cols[3]);
292 load_submit (dent->d_name, snum, mnum, lnum);
293 }
294 }
295 } /* while (fgets) */
297 if (fh != NULL)
298 {
299 fclose (fh);
300 fh = NULL;
301 }
303 /* processes and memory usage */
304 len = ssnprintf (file, sizeof (file),
305 PROCDIR "/%s/limit", dent->d_name);
306 if ((len < 0) || ((size_t) len >= sizeof (file)))
307 continue;
309 if (NULL == (fh = fopen (file, "r")))
310 {
311 char errbuf[1024];
312 ERROR ("Cannot open '%s': %s", file,
313 sstrerror (errno, errbuf, sizeof (errbuf)));
314 }
316 while ((fh != NULL) && (NULL != fgets (buffer, BUFSIZE, fh)))
317 {
318 const char *type = "vs_memory";
319 const char *type_instance;
320 gauge_t value;
322 if (strsplit (buffer, cols, 2) < 2)
323 continue;
325 if (0 == strcmp (cols[0], "PROC:"))
326 {
327 type = "vs_processes";
328 type_instance = "";
329 value = atof (cols[1]);
330 }
331 else
332 {
333 if (0 == strcmp (cols[0], "VM:"))
334 type_instance = "vm";
335 else if (0 == strcmp (cols[0], "VML:"))
336 type_instance = "vml";
337 else if (0 == strcmp (cols[0], "RSS:"))
338 type_instance = "rss";
339 else if (0 == strcmp (cols[0], "ANON:"))
340 type_instance = "anon";
341 else
342 continue;
344 value = atof (cols[1]) * pagesize;
345 }
347 submit_gauge (dent->d_name, type, type_instance, value);
348 } /* while (fgets) */
350 if (fh != NULL)
351 {
352 fclose (fh);
353 fh = NULL;
354 }
355 } /* while (readdir) */
357 closedir (proc);
359 return (0);
360 } /* int vserver_read */
362 void module_register (void)
363 {
364 plugin_register_init ("vserver", vserver_init);
365 plugin_register_read ("vserver", vserver_read);
366 } /* void module_register(void) */
368 /* vim: set ts=4 sw=4 noexpandtab : */