1 /**
2 * collectd - src/df.c
3 * Copyright (C) 2005-2007 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 };
55 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
57 static ignorelist_t *il_device = NULL;
58 static ignorelist_t *il_mountpoint = NULL;
59 static ignorelist_t *il_fstype = NULL;
61 static _Bool by_device = false;
63 static int df_init (void)
64 {
65 if (il_device == NULL)
66 il_device = ignorelist_create (1);
67 if (il_mountpoint == NULL)
68 il_mountpoint = ignorelist_create (1);
69 if (il_fstype == NULL)
70 il_fstype = ignorelist_create (1);
72 return (0);
73 }
75 static int df_config (const char *key, const char *value)
76 {
77 df_init ();
79 if (strcasecmp (key, "Device") == 0)
80 {
81 if (ignorelist_add (il_device, value))
82 return (1);
83 return (0);
84 }
85 else if (strcasecmp (key, "MountPoint") == 0)
86 {
87 if (ignorelist_add (il_mountpoint, value))
88 return (1);
89 return (0);
90 }
91 else if (strcasecmp (key, "FSType") == 0)
92 {
93 if (ignorelist_add (il_fstype, value))
94 return (1);
95 return (0);
96 }
97 else if (strcasecmp (key, "IgnoreSelected") == 0)
98 {
99 if (IS_TRUE (value))
100 {
101 ignorelist_set_invert (il_device, 0);
102 ignorelist_set_invert (il_mountpoint, 0);
103 ignorelist_set_invert (il_fstype, 0);
104 }
105 else
106 {
107 ignorelist_set_invert (il_device, 1);
108 ignorelist_set_invert (il_mountpoint, 1);
109 ignorelist_set_invert (il_fstype, 1);
110 }
111 return (0);
112 }
113 else if (strcasecmp (key, "ReportByDevice") == 0)
114 {
115 if (IS_TRUE (value))
116 by_device = true;
118 return (0);
119 }
121 return (-1);
122 }
124 static void df_submit (char *df_name,
125 const char *type,
126 gauge_t df_used,
127 gauge_t df_free)
128 {
129 value_t values[2];
130 value_list_t vl = VALUE_LIST_INIT;
132 values[0].gauge = df_used;
133 values[1].gauge = df_free;
135 vl.values = values;
136 vl.values_len = 2;
137 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
138 sstrncpy (vl.plugin, "df", sizeof (vl.plugin));
139 sstrncpy (vl.plugin_instance, "", sizeof (vl.plugin_instance));
140 sstrncpy (vl.type, type, sizeof (vl.host));
141 sstrncpy (vl.type_instance, df_name, sizeof (vl.type_instance));
143 plugin_dispatch_values (&vl);
144 } /* void df_submit */
146 static int df_read (void)
147 {
148 #if HAVE_STATVFS
149 struct statvfs statbuf;
150 #elif HAVE_STATFS
151 struct statfs statbuf;
152 #endif
153 /* struct STATANYFS statbuf; */
154 cu_mount_t *mnt_list;
155 cu_mount_t *mnt_ptr;
157 unsigned long long blocksize;
158 gauge_t df_free;
159 gauge_t df_used;
160 gauge_t df_inodes_free;
161 gauge_t df_inodes_used;
162 char disk_name[256];
164 mnt_list = NULL;
165 if (cu_mount_getlist (&mnt_list) == NULL)
166 return (-1);
168 for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
169 {
170 if (ignorelist_match (il_device,
171 (mnt_ptr->spec_device != NULL)
172 ? mnt_ptr->spec_device
173 : mnt_ptr->device))
174 continue;
175 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
176 continue;
177 if (ignorelist_match (il_fstype, mnt_ptr->type))
178 continue;
180 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
181 {
182 char errbuf[1024];
183 ERROR ("statv?fs failed: %s",
184 sstrerror (errno, errbuf,
185 sizeof (errbuf)));
186 continue;
187 }
189 if (!statbuf.f_blocks)
190 continue;
192 blocksize = BLOCKSIZE(statbuf);
193 df_free = statbuf.f_bfree * blocksize;
194 df_used = (statbuf.f_blocks - statbuf.f_bfree) * blocksize;
196 df_inodes_used = statbuf.f_files - statbuf.f_ffree;
197 df_inodes_free = statbuf.f_ffree;
199 if (by_device)
200 {
201 /* eg, /dev/hda1 -- strip off the "/dev/" */
202 if (strncmp (mnt_ptr->spec_device, "/dev/", strlen ("/dev/")) == 0)
203 sstrncpy (disk_name, mnt_ptr->spec_device + strlen ("/dev/"), sizeof (disk_name));
204 else
205 sstrncpy (disk_name, mnt_ptr->spec_device, sizeof (disk_name));
207 if (strlen(disk_name) < 1)
208 {
209 DEBUG("df: no device name name for mountpoint %s, skipping", mnt_ptr->dir);
210 continue;
211 }
212 }
213 else
214 {
215 if (strcmp (mnt_ptr->dir, "/") == 0)
216 {
217 sstrncpy (disk_name, "root", sizeof (disk_name));
218 }
219 else
220 {
221 int i, len;
223 sstrncpy (disk_name, mnt_ptr->dir + 1, sizeof (disk_name));
224 len = strlen (disk_name);
226 for (i = 0; i < len; i++)
227 if (disk_name[i] == '/')
228 disk_name[i] = '-';
229 }
230 }
232 df_submit (disk_name, "df", df_used, df_free);
233 df_submit (disk_name, "df_inodes", df_inodes_used, df_inodes_free);
234 }
236 cu_mount_freelist (mnt_list);
238 return (0);
239 } /* int df_read */
241 void module_register (void)
242 {
243 plugin_register_config ("df", df_config,
244 config_keys, config_keys_num);
245 plugin_register_init ("df", df_init);
246 plugin_register_read ("df", df_read);
247 } /* void module_register */