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 verplant.org>
21 * Paul Sadauskas <psadauskas at gmail.com>
27 #include "configfile.h"
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 report_free_percentage = 0;
70 static int df_init (void)
72 if (il_device == NULL)
73 il_device = ignorelist_create (1);
74 if (il_mountpoint == NULL)
75 il_mountpoint = ignorelist_create (1);
76 if (il_fstype == NULL)
77 il_fstype = ignorelist_create (1);
82 static int df_config (const char *key, const char *value)
86 if (strcasecmp (key, "Device") == 0)
88 if (ignorelist_add (il_device, value))
92 else if (strcasecmp (key, "MountPoint") == 0)
94 if (ignorelist_add (il_mountpoint, value))
98 else if (strcasecmp (key, "FSType") == 0)
100 if (ignorelist_add (il_fstype, value))
104 else if (strcasecmp (key, "IgnoreSelected") == 0)
108 ignorelist_set_invert (il_device, 0);
109 ignorelist_set_invert (il_mountpoint, 0);
110 ignorelist_set_invert (il_fstype, 0);
114 ignorelist_set_invert (il_device, 1);
115 ignorelist_set_invert (il_mountpoint, 1);
116 ignorelist_set_invert (il_fstype, 1);
120 else if (strcasecmp (key, "ReportByDevice") == 0)
127 else if (strcasecmp (key, "ReportInodes") == 0)
137 else if (strcasecmp (key, "FreePercentage") == 0)
140 report_free_percentage = 1;
142 report_free_percentage = 0;
150 __attribute__ ((nonnull(2)))
151 static void df_submit_one (char *plugin_instance,
152 const char *type, const char *type_instance,
156 value_list_t vl = VALUE_LIST_INIT;
158 values[0].gauge = value;
162 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
163 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
164 if (plugin_instance != NULL)
165 sstrncpy (vl.plugin_instance, plugin_instance,
166 sizeof (vl.plugin_instance));
167 sstrncpy (vl.type, type, sizeof (vl.type));
168 if (type_instance != NULL)
169 sstrncpy (vl.type_instance, type_instance,
170 sizeof (vl.type_instance));
172 plugin_dispatch_values (&vl);
173 } /* void df_submit_one */
175 static int df_read (void)
178 struct statvfs statbuf;
180 struct statfs statbuf;
182 /* struct STATANYFS statbuf; */
183 cu_mount_t *mnt_list;
187 if (cu_mount_getlist (&mnt_list) == NULL)
189 ERROR ("df plugin: cu_mount_getlist failed.");
193 for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
195 unsigned long long blocksize;
198 uint64_t blk_reserved;
200 float blk_free_percentage;
202 if (ignorelist_match (il_device,
203 (mnt_ptr->spec_device != NULL)
204 ? mnt_ptr->spec_device
207 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
209 if (ignorelist_match (il_fstype, mnt_ptr->type))
212 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
215 ERROR (STATANYFS_STR"(%s) failed: %s",
217 sstrerror (errno, errbuf,
222 if (!statbuf.f_blocks)
227 /* eg, /dev/hda1 -- strip off the "/dev/" */
228 if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
229 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
231 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
233 if (strlen(disk_name) < 1)
235 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
241 if (strcmp (mnt_ptr->dir, "/") == 0)
243 if (strcmp (mnt_ptr->type, "rootfs") == 0)
245 sstrncpy (disk_name, "root", sizeof (disk_name));
251 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
252 len = strlen (disk_name);
254 for (i = 0; i < len; i++)
255 if (disk_name[i] == '/')
260 blocksize = BLOCKSIZE(statbuf);
263 * Sanity-check for the values in the struct
265 /* Check for negative "available" byes. For example UFS can
266 * report negative free space for user. Notice. blk_reserved
267 * will start to diminish after this. */
269 /* Cast and temporary variable are needed to avoid
271 * ((struct statvfs).f_bavail is unsigned (POSIX)) */
272 int64_t signed_bavail = (int64_t) statbuf.f_bavail;
273 if (signed_bavail < 0)
274 statbuf.f_bavail = 0;
276 if (statbuf.f_bavail < 0)
277 statbuf.f_bavail = 0;
279 /* Make sure that f_blocks >= f_bfree >= f_bavail */
280 if (statbuf.f_bfree < statbuf.f_bavail)
281 statbuf.f_bfree = statbuf.f_bavail;
282 if (statbuf.f_blocks < statbuf.f_bfree)
283 statbuf.f_blocks = statbuf.f_bfree;
285 blk_free = (uint64_t) statbuf.f_bavail;
286 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
287 blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
289 df_submit_one (disk_name, "df_complex", "free",
290 (gauge_t) (blk_free * blocksize));
291 df_submit_one (disk_name, "df_complex", "reserved",
292 (gauge_t) (blk_reserved * blocksize));
293 df_submit_one (disk_name, "df_complex", "used",
294 (gauge_t) (blk_used * blocksize));
297 if (report_free_percentage)
299 blk_free_percentage = (float)((statbuf.f_blocks - statbuf.f_bfree) / statbuf.f_blocks * 100);
300 float diff = statbuf.f_blocks - statbuf.f_bfree;
301 float div = diff/statbuf.f_blocks ;
303 df_submit_one (disk_name, "df_complex", "free_percentage",
304 (gauge_t) (div * 100));
310 uint64_t inode_reserved;
313 /* Sanity-check for the values in the struct */
314 if (statbuf.f_ffree < statbuf.f_favail)
315 statbuf.f_ffree = statbuf.f_favail;
316 if (statbuf.f_files < statbuf.f_ffree)
317 statbuf.f_files = statbuf.f_ffree;
319 inode_free = (uint64_t) statbuf.f_favail;
320 inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
321 inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
323 df_submit_one (disk_name, "df_inodes", "free",
324 (gauge_t) inode_free);
325 df_submit_one (disk_name, "df_inodes", "reserved",
326 (gauge_t) inode_reserved);
327 df_submit_one (disk_name, "df_inodes", "used",
328 (gauge_t) inode_used);
332 cu_mount_freelist (mnt_list);
337 void module_register (void)
339 plugin_register_config ("df", df_config,
340 config_keys, config_keys_num);
341 plugin_register_init ("df", df_init);
342 plugin_register_read ("df", df_read);
343 } /* void module_register */