2e9b2ae8288dd64f1a75d30b51d83593a8fd4ef8
1 /**
2 * collectd - src/df.c
3 * Copyright (C) 2005-2009 Florian octo Forster
4 * Copyright (C) 2009 Paul Sadauskas
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; only version 2 of the License is applicable.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Florian octo Forster <octo at verplant.org>
21 * Paul Sadauskas <psadauskas at gmail.com>
22 **/
24 #include "collectd.h"
25 #include "common.h"
26 #include "plugin.h"
27 #include "configfile.h"
28 #include "utils_mount.h"
29 #include "utils_ignorelist.h"
31 #if HAVE_STATVFS
32 # if HAVE_SYS_STATVFS_H
33 # include <sys/statvfs.h>
34 # endif
35 # define STATANYFS statvfs
36 # define STATANYFS_STR "statvfs"
37 # define BLOCKSIZE(s) ((s).f_frsize ? (s).f_frsize : (s).f_bsize)
38 #elif HAVE_STATFS
39 # if HAVE_SYS_STATFS_H
40 # include <sys/statfs.h>
41 # endif
42 # define STATANYFS statfs
43 # define STATANYFS_STR "statfs"
44 # define BLOCKSIZE(s) (s).f_bsize
45 #else
46 # error "No applicable input method."
47 #endif
49 static const char *config_keys[] =
50 {
51 "Device",
52 "MountPoint",
53 "FSType",
54 "IgnoreSelected",
55 "ReportByDevice",
56 "ReportReserved",
57 "ReportInodes"
58 };
59 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
61 static ignorelist_t *il_device = NULL;
62 static ignorelist_t *il_mountpoint = NULL;
63 static ignorelist_t *il_fstype = NULL;
65 static _Bool by_device = false;
66 static _Bool report_reserved = false;
67 static _Bool report_inodes = false;
69 static int df_init (void)
70 {
71 if (il_device == NULL)
72 il_device = ignorelist_create (1);
73 if (il_mountpoint == NULL)
74 il_mountpoint = ignorelist_create (1);
75 if (il_fstype == NULL)
76 il_fstype = ignorelist_create (1);
78 return (0);
79 }
81 static int df_config (const char *key, const char *value)
82 {
83 df_init ();
85 if (strcasecmp (key, "Device") == 0)
86 {
87 if (ignorelist_add (il_device, value))
88 return (1);
89 return (0);
90 }
91 else if (strcasecmp (key, "MountPoint") == 0)
92 {
93 if (ignorelist_add (il_mountpoint, value))
94 return (1);
95 return (0);
96 }
97 else if (strcasecmp (key, "FSType") == 0)
98 {
99 if (ignorelist_add (il_fstype, value))
100 return (1);
101 return (0);
102 }
103 else if (strcasecmp (key, "IgnoreSelected") == 0)
104 {
105 if (IS_TRUE (value))
106 {
107 ignorelist_set_invert (il_device, 0);
108 ignorelist_set_invert (il_mountpoint, 0);
109 ignorelist_set_invert (il_fstype, 0);
110 }
111 else
112 {
113 ignorelist_set_invert (il_device, 1);
114 ignorelist_set_invert (il_mountpoint, 1);
115 ignorelist_set_invert (il_fstype, 1);
116 }
117 return (0);
118 }
119 else if (strcasecmp (key, "ReportByDevice") == 0)
120 {
121 if (IS_TRUE (value))
122 by_device = true;
124 return (0);
125 }
126 else if (strcasecmp (key, "ReportReserved") == 0)
127 {
128 if (IS_TRUE (value))
129 report_reserved = true;
130 else
131 report_reserved = false;
133 return (0);
134 }
135 else if (strcasecmp (key, "ReportInodes") == 0)
136 {
137 if (IS_TRUE (value))
138 report_inodes = true;
139 else
140 report_inodes = false;
142 return (0);
143 }
146 return (-1);
147 }
149 static void df_submit_two (char *df_name,
150 const char *type,
151 gauge_t df_used,
152 gauge_t df_free)
153 {
154 value_t values[2];
155 value_list_t vl = VALUE_LIST_INIT;
157 values[0].gauge = df_used;
158 values[1].gauge = df_free;
160 vl.values = values;
161 vl.values_len = 2;
162 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
163 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
164 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
165 sstrncpy (vl.type, type, sizeof (vl.type));
166 sstrncpy (vl.type_instance, df_name, sizeof (vl.type_instance));
168 plugin_dispatch_values (&vl);
169 } /* void df_submit_two */
171 __attribute__ ((nonnull(2)))
172 static void df_submit_one (char *plugin_instance,
173 const char *type, const char *type_instance,
174 gauge_t value)
175 {
176 value_t values[1];
177 value_list_t vl = VALUE_LIST_INIT;
179 values[0].gauge = value;
181 vl.values = values;
182 vl.values_len = 1;
183 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
184 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
185 if (plugin_instance != NULL)
186 sstrncpy (vl.plugin_instance, plugin_instance,
187 sizeof (vl.plugin_instance));
188 sstrncpy (vl.type, type, sizeof (vl.type));
189 if (type_instance != NULL)
190 sstrncpy (vl.type_instance, type_instance,
191 sizeof (vl.type_instance));
193 plugin_dispatch_values (&vl);
194 } /* void df_submit_one */
196 static int df_read (void)
197 {
198 #if HAVE_STATVFS
199 struct statvfs statbuf;
200 #elif HAVE_STATFS
201 struct statfs statbuf;
202 #endif
203 /* struct STATANYFS statbuf; */
204 cu_mount_t *mnt_list;
205 cu_mount_t *mnt_ptr;
207 mnt_list = NULL;
208 if (cu_mount_getlist (&mnt_list) == NULL)
209 {
210 ERROR ("df plugin: cu_mount_getlist failed.");
211 return (-1);
212 }
214 for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
215 {
216 unsigned long long blocksize;
217 char disk_name[256];
219 if (ignorelist_match (il_device,
220 (mnt_ptr->spec_device != NULL)
221 ? mnt_ptr->spec_device
222 : mnt_ptr->device))
223 continue;
224 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
225 continue;
226 if (ignorelist_match (il_fstype, mnt_ptr->type))
227 continue;
229 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
230 {
231 char errbuf[1024];
232 ERROR (STATANYFS_STR"(%s) failed: %s",
233 mnt_ptr->dir,
234 sstrerror (errno, errbuf,
235 sizeof (errbuf)));
236 continue;
237 }
239 if (!statbuf.f_blocks)
240 continue;
242 if (by_device)
243 {
244 /* eg, /dev/hda1 -- strip off the "/dev/" */
245 if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
246 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
247 else
248 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
250 if (strlen(disk_name) < 1)
251 {
252 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
253 continue;
254 }
255 }
256 else
257 {
258 if (strcmp (mnt_ptr->dir, "/") == 0)
259 {
260 sstrncpy (disk_name, "root", sizeof (disk_name));
261 }
262 else
263 {
264 int i, len;
266 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
267 len = strlen (disk_name);
269 for (i = 0; i < len; i++)
270 if (disk_name[i] == '/')
271 disk_name[i] = '-';
272 }
273 }
275 blocksize = BLOCKSIZE(statbuf);
277 if (report_reserved)
278 {
279 uint64_t blk_free;
280 uint64_t blk_reserved;
281 uint64_t blk_used;
283 /* Sanity-check for the values in the struct */
284 if (statbuf.f_bfree < statbuf.f_bavail)
285 statbuf.f_bfree = statbuf.f_bavail;
286 if (statbuf.f_blocks < statbuf.f_bfree)
287 statbuf.f_blocks = statbuf.f_bfree;
289 blk_free = (uint64_t) statbuf.f_bavail;
290 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
291 blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
293 df_submit_one (disk_name, "df_complex", "free",
294 (gauge_t) (blk_free * blocksize));
295 df_submit_one (disk_name, "df_complex", "reserved",
296 (gauge_t) (blk_reserved * blocksize));
297 df_submit_one (disk_name, "df_complex", "used",
298 (gauge_t) (blk_used * blocksize));
299 }
300 else /* compatibility code */
301 {
302 gauge_t df_free;
303 gauge_t df_used;
305 df_free = statbuf.f_bfree * blocksize;
306 df_used = (statbuf.f_blocks - statbuf.f_bfree) * blocksize;
308 df_submit_two (disk_name, "df", df_used, df_free);
309 }
311 /* inode handling */
312 if (report_inodes)
313 {
314 uint64_t inode_free;
315 uint64_t inode_reserved;
316 uint64_t inode_used;
318 /* Sanity-check for the values in the struct */
319 if (statbuf.f_ffree < statbuf.f_favail)
320 statbuf.f_ffree = statbuf.f_favail;
321 if (statbuf.f_files < statbuf.f_ffree)
322 statbuf.f_files = statbuf.f_ffree;
324 inode_free = (uint64_t) statbuf.f_favail;
325 inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
326 inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
328 df_submit_one (disk_name, "df_inodes", "free",
329 (gauge_t) inode_free);
330 df_submit_one (disk_name, "df_inodes", "reserved",
331 (gauge_t) inode_reserved);
332 df_submit_one (disk_name, "df_inodes", "used",
333 (gauge_t) inode_used);
334 }
335 }
337 cu_mount_freelist (mnt_list);
339 return (0);
340 } /* int df_read */
342 void module_register (void)
343 {
344 plugin_register_config ("df", df_config,
345 config_keys, config_keys_num);
346 plugin_register_init ("df", df_init);
347 plugin_register_read ("df", df_read);
348 } /* void module_register */