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 BLOCKSIZE(s) ((s).f_frsize ? (s).f_frsize : (s).f_bsize)
37 #elif HAVE_STATFS
38 # if HAVE_SYS_STATFS_H
39 # include <sys/statfs.h>
40 # endif
41 # define STATANYFS statfs
42 # define BLOCKSIZE(s) (s).f_bsize
43 #else
44 # error "No applicable input method."
45 #endif
47 static const char *config_keys[] =
48 {
49 "Device",
50 "MountPoint",
51 "FSType",
52 "IgnoreSelected",
53 "ReportByDevice",
54 "ReportReserved",
55 "ReportInodes"
56 };
57 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
59 static ignorelist_t *il_device = NULL;
60 static ignorelist_t *il_mountpoint = NULL;
61 static ignorelist_t *il_fstype = NULL;
63 static _Bool by_device = false;
64 static _Bool report_inodes = false;
66 static int df_init (void)
67 {
68 if (il_device == NULL)
69 il_device = ignorelist_create (1);
70 if (il_mountpoint == NULL)
71 il_mountpoint = ignorelist_create (1);
72 if (il_fstype == NULL)
73 il_fstype = ignorelist_create (1);
75 return (0);
76 }
78 static int df_config (const char *key, const char *value)
79 {
80 df_init ();
82 if (strcasecmp (key, "Device") == 0)
83 {
84 if (ignorelist_add (il_device, value))
85 return (1);
86 return (0);
87 }
88 else if (strcasecmp (key, "MountPoint") == 0)
89 {
90 if (ignorelist_add (il_mountpoint, value))
91 return (1);
92 return (0);
93 }
94 else if (strcasecmp (key, "FSType") == 0)
95 {
96 if (ignorelist_add (il_fstype, value))
97 return (1);
98 return (0);
99 }
100 else if (strcasecmp (key, "IgnoreSelected") == 0)
101 {
102 if (IS_TRUE (value))
103 {
104 ignorelist_set_invert (il_device, 0);
105 ignorelist_set_invert (il_mountpoint, 0);
106 ignorelist_set_invert (il_fstype, 0);
107 }
108 else
109 {
110 ignorelist_set_invert (il_device, 1);
111 ignorelist_set_invert (il_mountpoint, 1);
112 ignorelist_set_invert (il_fstype, 1);
113 }
114 return (0);
115 }
116 else if (strcasecmp (key, "ReportByDevice") == 0)
117 {
118 if (IS_TRUE (value))
119 by_device = true;
121 return (0);
122 }
123 else if (strcasecmp (key, "ReportReserved") == 0)
124 {
125 /* Nop for backwards compatibility. */
126 return (0);
127 }
128 else if (strcasecmp (key, "ReportInodes") == 0)
129 {
130 if (IS_TRUE (value))
131 report_inodes = true;
132 else
133 report_inodes = false;
135 return (0);
136 }
139 return (-1);
140 }
142 __attribute__ ((nonnull(2)))
143 static void df_submit_one (char *plugin_instance,
144 const char *type, const char *type_instance,
145 gauge_t value)
146 {
147 value_t values[1];
148 value_list_t vl = VALUE_LIST_INIT;
150 values[0].gauge = value;
152 vl.values = values;
153 vl.values_len = 1;
154 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
155 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
156 if (plugin_instance != NULL)
157 sstrncpy (vl.plugin_instance, plugin_instance,
158 sizeof (vl.plugin_instance));
159 sstrncpy (vl.type, type, sizeof (vl.type));
160 if (type_instance != NULL)
161 sstrncpy (vl.type_instance, type_instance,
162 sizeof (vl.type_instance));
164 plugin_dispatch_values (&vl);
165 } /* void df_submit_one */
167 static int df_read (void)
168 {
169 #if HAVE_STATVFS
170 struct statvfs statbuf;
171 #elif HAVE_STATFS
172 struct statfs statbuf;
173 #endif
174 /* struct STATANYFS statbuf; */
175 cu_mount_t *mnt_list;
176 cu_mount_t *mnt_ptr;
178 mnt_list = NULL;
179 if (cu_mount_getlist (&mnt_list) == NULL)
180 return (-1);
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 ("statv?fs failed: %s",
204 sstrerror (errno, errbuf,
205 sizeof (errbuf)));
206 continue;
207 }
209 if (!statbuf.f_blocks)
210 continue;
212 if (by_device)
213 {
214 /* eg, /dev/hda1 -- strip off the "/dev/" */
215 if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
216 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
217 else
218 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
220 if (strlen(disk_name) < 1)
221 {
222 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
223 continue;
224 }
225 }
226 else
227 {
228 if (strcmp (mnt_ptr->dir, "/") == 0)
229 {
230 sstrncpy (disk_name, "root", sizeof (disk_name));
231 }
232 else
233 {
234 int i, len;
236 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
237 len = strlen (disk_name);
239 for (i = 0; i < len; i++)
240 if (disk_name[i] == '/')
241 disk_name[i] = '-';
242 }
243 }
245 blocksize = BLOCKSIZE(statbuf);
247 /* Sanity-check for the values in the struct */
248 if (statbuf.f_bfree < statbuf.f_bavail)
249 statbuf.f_bfree = statbuf.f_bavail;
250 if (statbuf.f_blocks < statbuf.f_bfree)
251 statbuf.f_blocks = statbuf.f_bfree;
253 blk_free = (uint64_t) statbuf.f_bavail;
254 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
255 blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
257 df_submit_one (disk_name, "df_complex", "free",
258 (gauge_t) (blk_free * blocksize));
259 df_submit_one (disk_name, "df_complex", "reserved",
260 (gauge_t) (blk_reserved * blocksize));
261 df_submit_one (disk_name, "df_complex", "used",
262 (gauge_t) (blk_used * blocksize));
264 /* inode handling */
265 if (report_inodes)
266 {
267 uint64_t inode_free;
268 uint64_t inode_reserved;
269 uint64_t inode_used;
271 /* Sanity-check for the values in the struct */
272 if (statbuf.f_ffree < statbuf.f_favail)
273 statbuf.f_ffree = statbuf.f_favail;
274 if (statbuf.f_files < statbuf.f_ffree)
275 statbuf.f_files = statbuf.f_ffree;
277 inode_free = (uint64_t) statbuf.f_favail;
278 inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
279 inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
281 df_submit_one (disk_name, "df_inodes", "free",
282 (gauge_t) inode_free);
283 df_submit_one (disk_name, "df_inodes", "reserved",
284 (gauge_t) inode_reserved);
285 df_submit_one (disk_name, "df_inodes", "used",
286 (gauge_t) inode_used);
287 }
288 }
290 cu_mount_freelist (mnt_list);
292 return (0);
293 } /* int df_read */
295 void module_register (void)
296 {
297 plugin_register_config ("df", df_config,
298 config_keys, config_keys_num);
299 plugin_register_init ("df", df_init);
300 plugin_register_read ("df", df_read);
301 } /* void module_register */