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 = 0;
64 static _Bool report_inodes = 0;
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 = 1;
121 return (0);
122 }
123 else if (strcasecmp (key, "ReportInodes") == 0)
124 {
125 if (IS_TRUE (value))
126 report_inodes = 1;
127 else
128 report_inodes = 0;
130 return (0);
131 }
134 return (-1);
135 }
137 __attribute__ ((nonnull(2)))
138 static void df_submit_one (char *plugin_instance,
139 const char *type, const char *type_instance,
140 gauge_t value)
141 {
142 value_t values[1];
143 value_list_t vl = VALUE_LIST_INIT;
145 values[0].gauge = value;
147 vl.values = values;
148 vl.values_len = 1;
149 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
150 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
151 if (plugin_instance != NULL)
152 sstrncpy (vl.plugin_instance, plugin_instance,
153 sizeof (vl.plugin_instance));
154 sstrncpy (vl.type, type, sizeof (vl.type));
155 if (type_instance != NULL)
156 sstrncpy (vl.type_instance, type_instance,
157 sizeof (vl.type_instance));
159 plugin_dispatch_values (&vl);
160 } /* void df_submit_one */
162 static int df_read (void)
163 {
164 #if HAVE_STATVFS
165 struct statvfs statbuf;
166 #elif HAVE_STATFS
167 struct statfs statbuf;
168 #endif
169 /* struct STATANYFS statbuf; */
170 cu_mount_t *mnt_list;
171 cu_mount_t *mnt_ptr;
173 mnt_list = NULL;
174 if (cu_mount_getlist (&mnt_list) == NULL)
175 {
176 ERROR ("df plugin: cu_mount_getlist failed.");
177 return (-1);
178 }
180 for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
181 {
182 unsigned long long blocksize;
183 char disk_name[256];
184 uint64_t blk_free;
185 uint64_t blk_reserved;
186 uint64_t blk_used;
188 if (ignorelist_match (il_device,
189 (mnt_ptr->spec_device != NULL)
190 ? mnt_ptr->spec_device
191 : mnt_ptr->device))
192 continue;
193 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
194 continue;
195 if (ignorelist_match (il_fstype, mnt_ptr->type))
196 continue;
198 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
199 {
200 char errbuf[1024];
201 ERROR ("statv?fs failed: %s",
202 sstrerror (errno, errbuf,
203 sizeof (errbuf)));
204 continue;
205 }
207 if (!statbuf.f_blocks)
208 continue;
210 if (by_device)
211 {
212 /* eg, /dev/hda1 -- strip off the "/dev/" */
213 if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
214 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
215 else
216 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
218 if (strlen(disk_name) < 1)
219 {
220 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
221 continue;
222 }
223 }
224 else
225 {
226 if (strcmp (mnt_ptr->dir, "/") == 0)
227 {
228 sstrncpy (disk_name, "root", sizeof (disk_name));
229 }
230 else
231 {
232 int i, len;
234 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
235 len = strlen (disk_name);
237 for (i = 0; i < len; i++)
238 if (disk_name[i] == '/')
239 disk_name[i] = '-';
240 }
241 }
243 blocksize = BLOCKSIZE(statbuf);
245 /* Sanity-check for the values in the struct */
246 if (statbuf.f_bfree < statbuf.f_bavail)
247 statbuf.f_bfree = statbuf.f_bavail;
248 if (statbuf.f_blocks < statbuf.f_bfree)
249 statbuf.f_blocks = statbuf.f_bfree;
251 blk_free = (uint64_t) statbuf.f_bavail;
252 blk_reserved = (uint64_t) (statbuf.f_bfree - statbuf.f_bavail);
253 blk_used = (uint64_t) (statbuf.f_blocks - statbuf.f_bfree);
255 df_submit_one (disk_name, "df_complex", "free",
256 (gauge_t) (blk_free * blocksize));
257 df_submit_one (disk_name, "df_complex", "reserved",
258 (gauge_t) (blk_reserved * blocksize));
259 df_submit_one (disk_name, "df_complex", "used",
260 (gauge_t) (blk_used * blocksize));
262 /* inode handling */
263 if (report_inodes)
264 {
265 uint64_t inode_free;
266 uint64_t inode_reserved;
267 uint64_t inode_used;
269 /* Sanity-check for the values in the struct */
270 if (statbuf.f_ffree < statbuf.f_favail)
271 statbuf.f_ffree = statbuf.f_favail;
272 if (statbuf.f_files < statbuf.f_ffree)
273 statbuf.f_files = statbuf.f_ffree;
275 inode_free = (uint64_t) statbuf.f_favail;
276 inode_reserved = (uint64_t) (statbuf.f_ffree - statbuf.f_favail);
277 inode_used = (uint64_t) (statbuf.f_files - statbuf.f_ffree);
279 df_submit_one (disk_name, "df_inodes", "free",
280 (gauge_t) inode_free);
281 df_submit_one (disk_name, "df_inodes", "reserved",
282 (gauge_t) inode_reserved);
283 df_submit_one (disk_name, "df_inodes", "used",
284 (gauge_t) inode_used);
285 }
286 }
288 cu_mount_freelist (mnt_list);
290 return (0);
291 } /* int df_read */
293 void module_register (void)
294 {
295 plugin_register_config ("df", df_config,
296 config_keys, config_keys_num);
297 plugin_register_init ("df", df_init);
298 plugin_register_read ("df", df_read);
299 } /* void module_register */