Code

Merge pull request #427 from kbingham/version_fix
[collectd.git] / src / df.c
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         "ValuesAbsolute",
59         "ValuesPercentage"
60 };
61 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
63 static ignorelist_t *il_device = NULL;
64 static ignorelist_t *il_mountpoint = NULL;
65 static ignorelist_t *il_fstype = NULL;
67 static _Bool by_device = 0;
68 static _Bool report_inodes = 0;
69 static _Bool values_absolute = 1;
70 static _Bool values_percentage = 0;
72 static int df_init (void)
73 {
74         if (il_device == NULL)
75                 il_device = ignorelist_create (1);
76         if (il_mountpoint == NULL)
77                 il_mountpoint = ignorelist_create (1);
78         if (il_fstype == NULL)
79                 il_fstype = ignorelist_create (1);
81         return (0);
82 }
84 static int df_config (const char *key, const char *value)
85 {
86         df_init ();
88         if (strcasecmp (key, "Device") == 0)
89         {
90                 if (ignorelist_add (il_device, value))
91                         return (1);
92                 return (0);
93         }
94         else if (strcasecmp (key, "MountPoint") == 0)
95         {
96                 if (ignorelist_add (il_mountpoint, value))
97                         return (1);
98                 return (0);
99         }
100         else if (strcasecmp (key, "FSType") == 0)
101         {
102                 if (ignorelist_add (il_fstype, value))
103                         return (1);
104                 return (0);
105         }
106         else if (strcasecmp (key, "IgnoreSelected") == 0)
107         {
108                 if (IS_TRUE (value))
109                 {
110                         ignorelist_set_invert (il_device, 0);
111                         ignorelist_set_invert (il_mountpoint, 0);
112                         ignorelist_set_invert (il_fstype, 0);
113                 }
114                 else
115                 {
116                         ignorelist_set_invert (il_device, 1);
117                         ignorelist_set_invert (il_mountpoint, 1);
118                         ignorelist_set_invert (il_fstype, 1);
119                 }
120                 return (0);
121         }
122         else if (strcasecmp (key, "ReportByDevice") == 0)
123         {
124                 if (IS_TRUE (value))
125                         by_device = 1;
127                 return (0);
128         }
129         else if (strcasecmp (key, "ReportInodes") == 0)
130         {
131                 if (IS_TRUE (value))
132                         report_inodes = 1;
133                 else
134                         report_inodes = 0;
136                 return (0);
137         }
138         else if (strcasecmp (key, "ValuesAbsolute") == 0)
139         {
140                 if (IS_TRUE (value))
141                         values_absolute = 1;
142                 else
143                         values_absolute = 0;
145                 return (0);
146         }
147         else if (strcasecmp (key, "ValuesPercentage") == 0)
148         {
149                 if (IS_TRUE (value))
150                         values_percentage = 1;
151                 else
152                         values_percentage = 0;
154                 return (0);
155         }
157         return (-1);
160 __attribute__ ((nonnull(2)))
161 static void df_submit_one (char *plugin_instance,
162                 const char *type, const char *type_instance,
163                 gauge_t value)
165         value_t values[1];
166         value_list_t vl = VALUE_LIST_INIT;
168         values[0].gauge = value;
170         vl.values = values;
171         vl.values_len = 1;
172         sstrncpy (vl.host, hostname_g, sizeof (vl.host));
173         sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
174         if (plugin_instance != NULL)
175                 sstrncpy (vl.plugin_instance, plugin_instance,
176                                 sizeof (vl.plugin_instance));
177         sstrncpy (vl.type, type, sizeof (vl.type));
178         if (type_instance != NULL)
179                 sstrncpy (vl.type_instance, type_instance,
180                                 sizeof (vl.type_instance));
182         plugin_dispatch_values (&vl);
183 } /* void df_submit_one */
185 static int df_read (void)
187 #if HAVE_STATVFS
188         struct statvfs statbuf;
189 #elif HAVE_STATFS
190         struct statfs statbuf;
191 #endif
192         /* struct STATANYFS statbuf; */
193         cu_mount_t *mnt_list;
194         cu_mount_t *mnt_ptr;
196         mnt_list = NULL;
197         if (cu_mount_getlist (&mnt_list) == NULL)
198         {
199                 ERROR ("df plugin: cu_mount_getlist failed.");
200                 return (-1);
201         }
203         for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
204         {
205                 unsigned long long blocksize;
206                 char disk_name[256];
207                 uint64_t blk_free;
208                 uint64_t blk_reserved;
209                 uint64_t blk_used;
211                 if (ignorelist_match (il_device,
212                                         (mnt_ptr->spec_device != NULL)
213                                         ? mnt_ptr->spec_device
214                                         : mnt_ptr->device))
215                         continue;
216                 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
217                         continue;
218                 if (ignorelist_match (il_fstype, mnt_ptr->type))
219                         continue;
221                 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
222                 {
223                         char errbuf[1024];
224                         ERROR (STATANYFS_STR"(%s) failed: %s",
225                                         mnt_ptr->dir,
226                                         sstrerror (errno, errbuf,
227                                                 sizeof (errbuf)));
228                         continue;
229                 }
231                 if (!statbuf.f_blocks)
232                         continue;
234                 if (by_device)
235                 {
236                         /* eg, /dev/hda1  -- strip off the "/dev/" */
237                         if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
238                                 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
239                         else
240                                 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
242                         if (strlen(disk_name) < 1)
243                         {
244                                 DEBUG("df: no device name for mountpoint %s, skipping", mnt_ptr->dir);
245                                 continue;
246                         }
247                 }
248                 else
249                 {
250                         if (strcmp (mnt_ptr->dir, "/") == 0)
251                         {
252                                 if (strcmp (mnt_ptr->type, "rootfs") == 0)
253                                         continue;
254                                 sstrncpy (disk_name, "root", sizeof (disk_name));
255                         }
256                         else
257                         {
258                                 int i, len;
260                                 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
261                                 len = strlen (disk_name);
263                                 for (i = 0; i < len; i++)
264                                         if (disk_name[i] == '/')
265                                                 disk_name[i] = '-';
266                         }
267                 }
269                 blocksize = BLOCKSIZE(statbuf);
271                 /*
272                  * Sanity-check for the values in the struct
273                  */
274                 /* Check for negative "available" byes. For example UFS can
275                  * report negative free space for user. Notice. blk_reserved
276                  * will start to diminish after this. */
277 #if HAVE_STATVFS
278                 /* Cast and temporary variable are needed to avoid
279                  * compiler warnings.
280                  * ((struct statvfs).f_bavail is unsigned (POSIX)) */
281                 int64_t signed_bavail = (int64_t) statbuf.f_bavail;
282                 if (signed_bavail < 0)
283                         statbuf.f_bavail = 0;
284 #elif HAVE_STATFS
285                 if (statbuf.f_bavail < 0)
286                         statbuf.f_bavail = 0;
287 #endif
288                 /* Make sure that f_blocks >= f_bfree >= f_bavail */
289                 if (statbuf.f_bfree < statbuf.f_bavail)
290                         statbuf.f_bfree = statbuf.f_bavail;
291                 if (statbuf.f_blocks < statbuf.f_bfree)
292                         statbuf.f_blocks = statbuf.f_bfree;
294                 blk_free     = (uint64_t) statbuf.f_bavail;
295                 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
296                 blk_used     = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
298                 if (values_absolute)
299                 {
300                         df_submit_one (disk_name, "df_complex", "free",
301                                 (gauge_t) (blk_free * blocksize));
302                         df_submit_one (disk_name, "df_complex", "reserved",
303                                 (gauge_t) (blk_reserved * blocksize));
304                         df_submit_one (disk_name, "df_complex", "used",
305                                 (gauge_t) (blk_used * blocksize));
306                 }
308                 if (values_percentage)
309                 {
310                         if (statbuf.f_blocks > 0)
311                                 {
312                                 df_submit_one (disk_name, "percent_bytes", "free",
313                                         (gauge_t) ((float_t)(blk_free) / statbuf.f_blocks * 100));
314                                 df_submit_one (disk_name, "percent_bytes", "reserved",
315                                         (gauge_t) ((float_t)(blk_reserved) / statbuf.f_blocks * 100));
316                                 df_submit_one (disk_name, "percent_bytes", "used",
317                                         (gauge_t) ((float_t)(blk_used) / statbuf.f_blocks * 100));
318                                 }
319                         else return (-1);
320                 }
322                 /* inode handling */
323                 if (report_inodes)
324                 {
325                         uint64_t inode_free;
326                         uint64_t inode_reserved;
327                         uint64_t inode_used;
329                         /* Sanity-check for the values in the struct */
330                         if (statbuf.f_ffree < statbuf.f_favail)
331                                 statbuf.f_ffree = statbuf.f_favail;
332                         if (statbuf.f_files < statbuf.f_ffree)
333                                 statbuf.f_files = statbuf.f_ffree;
335                         inode_free = (uint64_t) statbuf.f_favail;
336                         inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
337                         inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
339                         if (values_percentage)
340                         {
341                                 if (statbuf.f_files > 0)
342                                 {
343                                         df_submit_one (disk_name, "percent_inodes", "free",
344                                                 (gauge_t) ((float_t)(inode_free) / statbuf.f_files * 100));
345                                         df_submit_one (disk_name, "percent_inodes", "reserved",
346                                                 (gauge_t) ((float_t)(inode_reserved) / statbuf.f_files * 100));
347                                         df_submit_one (disk_name, "percent_inodes", "used",
348                                                 (gauge_t) ((float_t)(inode_used) / statbuf.f_files * 100));
349                                 }
350                                 else return (-1);
351                         }
352                         if (values_absolute)
353                         {
354                                 df_submit_one (disk_name, "df_inodes", "free",
355                                                 (gauge_t) inode_free);
356                                 df_submit_one (disk_name, "df_inodes", "reserved",
357                                                 (gauge_t) inode_reserved);
358                                 df_submit_one (disk_name, "df_inodes", "used",
359                                                 (gauge_t) inode_used);
360                         }
361                 }
362         }
364         cu_mount_freelist (mnt_list);
366         return (0);
367 } /* int df_read */
369 void module_register (void)
371         plugin_register_config ("df", df_config,
372                         config_keys, config_keys_num);
373         plugin_register_init ("df", df_init);
374         plugin_register_read ("df", df_read);
375 } /* void module_register */