3 * Copyright (C) 2005-2009 Florian octo Forster
4 * Copyright (C) 2009 Paul Sadauskas
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.
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.
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
20 * Florian octo Forster <octo at collectd.org>
21 * Paul Sadauskas <psadauskas at gmail.com>
28 #include "utils_mount.h"
29 #include "utils_ignorelist.h"
32 # if HAVE_SYS_STATVFS_H
33 # include <sys/statvfs.h>
35 # define STATANYFS statvfs
36 # define STATANYFS_STR "statvfs"
37 # define BLOCKSIZE(s) ((s).f_frsize ? (s).f_frsize : (s).f_bsize)
39 # if HAVE_SYS_STATFS_H
40 # include <sys/statfs.h>
42 # define STATANYFS statfs
43 # define STATANYFS_STR "statfs"
44 # define BLOCKSIZE(s) (s).f_bsize
46 # error "No applicable input method."
49 static const char *config_keys[] =
60 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
62 static ignorelist_t *il_device = NULL;
63 static ignorelist_t *il_mountpoint = NULL;
64 static ignorelist_t *il_fstype = NULL;
66 static _Bool by_device = 0;
67 static _Bool report_inodes = 0;
68 static _Bool values_absolute = 1;
69 static _Bool values_percentage = 0;
71 static int df_init (void)
73 if (il_device == NULL)
74 il_device = ignorelist_create (1);
75 if (il_mountpoint == NULL)
76 il_mountpoint = ignorelist_create (1);
77 if (il_fstype == NULL)
78 il_fstype = ignorelist_create (1);
83 static int df_config (const char *key, const char *value)
87 if (strcasecmp (key, "Device") == 0)
89 if (ignorelist_add (il_device, value))
93 else if (strcasecmp (key, "MountPoint") == 0)
95 if (ignorelist_add (il_mountpoint, value))
99 else if (strcasecmp (key, "FSType") == 0)
101 if (ignorelist_add (il_fstype, value))
105 else if (strcasecmp (key, "IgnoreSelected") == 0)
109 ignorelist_set_invert (il_device, 0);
110 ignorelist_set_invert (il_mountpoint, 0);
111 ignorelist_set_invert (il_fstype, 0);
115 ignorelist_set_invert (il_device, 1);
116 ignorelist_set_invert (il_mountpoint, 1);
117 ignorelist_set_invert (il_fstype, 1);
121 else if (strcasecmp (key, "ReportByDevice") == 0)
128 else if (strcasecmp (key, "ReportInodes") == 0)
137 else if (strcasecmp (key, "ValuesAbsolute") == 0)
146 else if (strcasecmp (key, "ValuesPercentage") == 0)
149 values_percentage = 1;
151 values_percentage = 0;
159 __attribute__ ((nonnull(2)))
160 static void df_submit_one (char *plugin_instance,
161 const char *type, const char *type_instance,
164 value_list_t vl = VALUE_LIST_INIT;
166 vl.values = &(value_t) { .gauge = value };
168 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
169 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
170 if (plugin_instance != NULL)
171 sstrncpy (vl.plugin_instance, plugin_instance,
172 sizeof (vl.plugin_instance));
173 sstrncpy (vl.type, type, sizeof (vl.type));
174 if (type_instance != NULL)
175 sstrncpy (vl.type_instance, type_instance,
176 sizeof (vl.type_instance));
178 plugin_dispatch_values (&vl);
179 } /* void df_submit_one */
181 static int df_read (void)
184 struct statvfs statbuf;
186 struct statfs statbuf;
188 /* struct STATANYFS statbuf; */
189 cu_mount_t *mnt_list;
192 if (cu_mount_getlist (&mnt_list) == NULL)
194 ERROR ("df plugin: cu_mount_getlist failed.");
198 for (cu_mount_t *mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
200 unsigned long long blocksize;
204 uint64_t blk_reserved;
207 char const *dev = (mnt_ptr->spec_device != NULL)
208 ? mnt_ptr->spec_device
211 if (ignorelist_match (il_device, dev))
213 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
215 if (ignorelist_match (il_fstype, mnt_ptr->type))
218 /* search for duplicates *in front of* the current mnt_ptr. */
219 for (dup_ptr = mnt_list; dup_ptr != NULL; dup_ptr = dup_ptr->next)
221 /* No duplicate found: mnt_ptr is the first of its kind. */
222 if (dup_ptr == mnt_ptr)
228 /* Duplicate found: leave non-NULL dup_ptr. */
230 && (mnt_ptr->spec_device != NULL)
231 && (dup_ptr->spec_device != NULL)
232 && (strcmp (mnt_ptr->spec_device, dup_ptr->spec_device) == 0))
234 else if (!by_device && (strcmp (mnt_ptr->dir, dup_ptr->dir) == 0))
238 /* ignore duplicates */
242 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
245 ERROR (STATANYFS_STR"(%s) failed: %s",
247 sstrerror (errno, errbuf,
252 if (!statbuf.f_blocks)
257 /* eg, /dev/hda1 -- strip off the "/dev/" */
258 if (strncmp (dev, "/dev/", strlen ("/dev/")) == 0)
259 sstrncpy (disk_name, dev + strlen ("/dev/"), sizeof (disk_name));
261 sstrncpy (disk_name, dev, sizeof (disk_name));
263 if (strlen(disk_name) < 1)
265 DEBUG("df: no device name for mountpoint %s, skipping", mnt_ptr->dir);
271 if (strcmp (mnt_ptr->dir, "/") == 0)
272 sstrncpy (disk_name, "root", sizeof (disk_name));
277 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
278 len = strlen (disk_name);
280 for (int i = 0; i < len; i++)
281 if (disk_name[i] == '/')
286 blocksize = BLOCKSIZE(statbuf);
289 * Sanity-check for the values in the struct
291 /* Check for negative "available" byes. For example UFS can
292 * report negative free space for user. Notice. blk_reserved
293 * will start to diminish after this. */
295 /* Cast and temporary variable are needed to avoid
297 * ((struct statvfs).f_bavail is unsigned (POSIX)) */
298 int64_t signed_bavail = (int64_t) statbuf.f_bavail;
299 if (signed_bavail < 0)
300 statbuf.f_bavail = 0;
302 if (statbuf.f_bavail < 0)
303 statbuf.f_bavail = 0;
305 /* Make sure that f_blocks >= f_bfree >= f_bavail */
306 if (statbuf.f_bfree < statbuf.f_bavail)
307 statbuf.f_bfree = statbuf.f_bavail;
308 if (statbuf.f_blocks < statbuf.f_bfree)
309 statbuf.f_blocks = statbuf.f_bfree;
311 blk_free = (uint64_t) statbuf.f_bavail;
312 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
313 blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
317 df_submit_one (disk_name, "df_complex", "free",
318 (gauge_t) (blk_free * blocksize));
319 df_submit_one (disk_name, "df_complex", "reserved",
320 (gauge_t) (blk_reserved * blocksize));
321 df_submit_one (disk_name, "df_complex", "used",
322 (gauge_t) (blk_used * blocksize));
325 if (values_percentage)
327 if (statbuf.f_blocks > 0)
329 df_submit_one (disk_name, "percent_bytes", "free",
330 (gauge_t) ((float_t)(blk_free) / statbuf.f_blocks * 100));
331 df_submit_one (disk_name, "percent_bytes", "reserved",
332 (gauge_t) ((float_t)(blk_reserved) / statbuf.f_blocks * 100));
333 df_submit_one (disk_name, "percent_bytes", "used",
334 (gauge_t) ((float_t)(blk_used) / statbuf.f_blocks * 100));
340 if (report_inodes && statbuf.f_files != 0 && statbuf.f_ffree != 0)
343 uint64_t inode_reserved;
346 /* Sanity-check for the values in the struct */
347 if (statbuf.f_ffree < statbuf.f_favail)
348 statbuf.f_ffree = statbuf.f_favail;
349 if (statbuf.f_files < statbuf.f_ffree)
350 statbuf.f_files = statbuf.f_ffree;
352 inode_free = (uint64_t) statbuf.f_favail;
353 inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
354 inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
356 if (values_percentage)
358 if (statbuf.f_files > 0)
360 df_submit_one (disk_name, "percent_inodes", "free",
361 (gauge_t) ((float_t)(inode_free) / statbuf.f_files * 100));
362 df_submit_one (disk_name, "percent_inodes", "reserved",
363 (gauge_t) ((float_t)(inode_reserved) / statbuf.f_files * 100));
364 df_submit_one (disk_name, "percent_inodes", "used",
365 (gauge_t) ((float_t)(inode_used) / statbuf.f_files * 100));
371 df_submit_one (disk_name, "df_inodes", "free",
372 (gauge_t) inode_free);
373 df_submit_one (disk_name, "df_inodes", "reserved",
374 (gauge_t) inode_reserved);
375 df_submit_one (disk_name, "df_inodes", "used",
376 (gauge_t) inode_used);
381 cu_mount_freelist (mnt_list);
386 void module_register (void)
388 plugin_register_config ("df", df_config,
389 config_keys, config_keys_num);
390 plugin_register_init ("df", df_init);
391 plugin_register_read ("df", df_read);
392 } /* void module_register */