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 = 0;
66 static _Bool report_inodes = 0;
68 static int df_init (void)
69 {
70 if (il_device == NULL)
71 il_device = ignorelist_create (1);
72 if (il_mountpoint == NULL)
73 il_mountpoint = ignorelist_create (1);
74 if (il_fstype == NULL)
75 il_fstype = ignorelist_create (1);
77 return (0);
78 }
80 static int df_config (const char *key, const char *value)
81 {
82 df_init ();
84 if (strcasecmp (key, "Device") == 0)
85 {
86 if (ignorelist_add (il_device, value))
87 return (1);
88 return (0);
89 }
90 else if (strcasecmp (key, "MountPoint") == 0)
91 {
92 if (ignorelist_add (il_mountpoint, value))
93 return (1);
94 return (0);
95 }
96 else if (strcasecmp (key, "FSType") == 0)
97 {
98 if (ignorelist_add (il_fstype, value))
99 return (1);
100 return (0);
101 }
102 else if (strcasecmp (key, "IgnoreSelected") == 0)
103 {
104 if (IS_TRUE (value))
105 {
106 ignorelist_set_invert (il_device, 0);
107 ignorelist_set_invert (il_mountpoint, 0);
108 ignorelist_set_invert (il_fstype, 0);
109 }
110 else
111 {
112 ignorelist_set_invert (il_device, 1);
113 ignorelist_set_invert (il_mountpoint, 1);
114 ignorelist_set_invert (il_fstype, 1);
115 }
116 return (0);
117 }
118 else if (strcasecmp (key, "ReportByDevice") == 0)
119 {
120 if (IS_TRUE (value))
121 by_device = 1;
123 return (0);
124 }
125 else if (strcasecmp (key, "ReportInodes") == 0)
126 {
127 if (IS_TRUE (value))
128 report_inodes = 1;
129 else
130 report_inodes = 0;
132 return (0);
133 }
136 return (-1);
137 }
139 __attribute__ ((nonnull(2)))
140 static void df_submit_one (char *plugin_instance,
141 const char *type, const char *type_instance,
142 gauge_t value)
143 {
144 value_t values[1];
145 value_list_t vl = VALUE_LIST_INIT;
147 values[0].gauge = value;
149 vl.values = values;
150 vl.values_len = 1;
151 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
152 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
153 if (plugin_instance != NULL)
154 sstrncpy (vl.plugin_instance, plugin_instance,
155 sizeof (vl.plugin_instance));
156 sstrncpy (vl.type, type, sizeof (vl.type));
157 if (type_instance != NULL)
158 sstrncpy (vl.type_instance, type_instance,
159 sizeof (vl.type_instance));
161 plugin_dispatch_values (&vl);
162 } /* void df_submit_one */
164 static int df_read (void)
165 {
166 #if HAVE_STATVFS
167 struct statvfs statbuf;
168 #elif HAVE_STATFS
169 struct statfs statbuf;
170 #endif
171 /* struct STATANYFS statbuf; */
172 cu_mount_t *mnt_list;
173 cu_mount_t *mnt_ptr;
175 mnt_list = NULL;
176 if (cu_mount_getlist (&mnt_list) == NULL)
177 {
178 ERROR ("df plugin: cu_mount_getlist failed.");
179 return (-1);
180 }
182 for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
183 {
184 unsigned long long blocksize;
185 char disk_name[256];
186 uint64_t blk_free;
187 uint64_t blk_reserved;
188 uint64_t blk_used;
190 if (ignorelist_match (il_device,
191 (mnt_ptr->spec_device != NULL)
192 ? mnt_ptr->spec_device
193 : mnt_ptr->device))
194 continue;
195 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
196 continue;
197 if (ignorelist_match (il_fstype, mnt_ptr->type))
198 continue;
200 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
201 {
202 char errbuf[1024];
203 ERROR (STATANYFS_STR"(%s) failed: %s",
204 mnt_ptr->dir,
205 sstrerror (errno, errbuf,
206 sizeof (errbuf)));
207 continue;
208 }
210 if (!statbuf.f_blocks)
211 continue;
213 if (by_device)
214 {
215 /* eg, /dev/hda1 -- strip off the "/dev/" */
216 if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
217 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
218 else
219 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
221 if (strlen(disk_name) < 1)
222 {
223 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
224 continue;
225 }
226 }
227 else
228 {
229 if (strcmp (mnt_ptr->dir, "/") == 0)
230 {
231 sstrncpy (disk_name, "root", sizeof (disk_name));
232 }
233 else
234 {
235 int i, len;
237 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
238 len = strlen (disk_name);
240 for (i = 0; i < len; i++)
241 if (disk_name[i] == '/')
242 disk_name[i] = '-';
243 }
244 }
246 blocksize = BLOCKSIZE(statbuf);
248 /*
249 * Sanity-check for the values in the struct
250 */
251 /* Check for negative "available" byes. For example UFS can
252 * report negative free space for user. Notice. blk_reserved
253 * will start to diminish after this. */
254 #if HAVE_STATVFS
255 /* Cast and temporary variable are needed to avoid
256 * compiler warnings.
257 * ((struct statvfs).f_bavail is unsigned (POSIX)) */
258 int64_t signed_bavail = (int64_t) statbuf.f_bavail;
259 if (signed_bavail < 0)
260 statbuf.f_bavail = 0;
261 #elif HAVE_STATFS
262 if (statbuf.f_bavail < 0)
263 statbuf.f_bavail = 0;
264 #endif
265 /* Make sure that f_blocks >= f_bfree >= f_bavail */
266 if (statbuf.f_bfree < statbuf.f_bavail)
267 statbuf.f_bfree = statbuf.f_bavail;
268 if (statbuf.f_blocks < statbuf.f_bfree)
269 statbuf.f_blocks = statbuf.f_bfree;
271 blk_free = (uint64_t) statbuf.f_bavail;
272 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
273 blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
275 df_submit_one (disk_name, "df_complex", "free",
276 (gauge_t) (blk_free * blocksize));
277 df_submit_one (disk_name, "df_complex", "reserved",
278 (gauge_t) (blk_reserved * blocksize));
279 df_submit_one (disk_name, "df_complex", "used",
280 (gauge_t) (blk_used * blocksize));
282 /* inode handling */
283 if (report_inodes)
284 {
285 uint64_t inode_free;
286 uint64_t inode_reserved;
287 uint64_t inode_used;
289 /* Sanity-check for the values in the struct */
290 if (statbuf.f_ffree < statbuf.f_favail)
291 statbuf.f_ffree = statbuf.f_favail;
292 if (statbuf.f_files < statbuf.f_ffree)
293 statbuf.f_files = statbuf.f_ffree;
295 inode_free = (uint64_t) statbuf.f_favail;
296 inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
297 inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
299 df_submit_one (disk_name, "df_inodes", "free",
300 (gauge_t) inode_free);
301 df_submit_one (disk_name, "df_inodes", "reserved",
302 (gauge_t) inode_reserved);
303 df_submit_one (disk_name, "df_inodes", "used",
304 (gauge_t) inode_used);
305 }
306 }
308 cu_mount_freelist (mnt_list);
310 return (0);
311 } /* int df_read */
313 void module_register (void)
314 {
315 plugin_register_config ("df", df_config,
316 config_keys, config_keys_num);
317 plugin_register_init ("df", df_init);
318 plugin_register_read ("df", df_read);
319 } /* void module_register */