1 /**
2 * collectd - src/df.c
3 * Copyright (C) 2005-2007 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "configfile.h"
26 #include "utils_mount.h"
27 #include "utils_ignorelist.h"
29 #if HAVE_STATFS || HAVE_STATVFS
30 # define DF_HAVE_READ 1
31 #else
32 # define DF_HAVE_READ 0
33 #endif
35 #if HAVE_STATVFS
36 # if HAVE_SYS_STATVFS_H
37 # include <sys/statvfs.h>
38 # endif
39 # define STATANYFS statvfs
40 # define BLOCKSIZE(s) ((s).f_frsize ? (s).f_frsize : (s).f_bsize)
41 #elif HAVE_STATFS
42 # if HAVE_SYS_STATFS_H
43 # include <sys/statfs.h>
44 # endif
45 # define STATANYFS statfs
46 # define BLOCKSIZE(s) (s).f_bsize
47 #endif
49 /* 2^50 - 1 == 1125899906842623 = 1 Petabyte */
50 static data_source_t dsrc[2] =
51 {
52 {"free", DS_TYPE_GAUGE, 0, 1125899906842623.0},
53 {"used", DS_TYPE_GAUGE, 0, 1125899906842623.0}
54 };
56 static data_set_t ds =
57 {
58 "df", 2, dsrc
59 };
61 #if DF_HAVE_READ
62 static const char *config_keys[] =
63 {
64 "Device",
65 "MountPoint",
66 "FSType",
67 "IgnoreSelected",
68 NULL
69 };
70 static int config_keys_num = 4;
72 static ignorelist_t *il_device = NULL;
73 static ignorelist_t *il_mountpoint = NULL;
74 static ignorelist_t *il_fstype = NULL;
76 static int df_init (void)
77 {
78 if (il_device == NULL)
79 il_device = ignorelist_create (1);
80 if (il_mountpoint == NULL)
81 il_mountpoint = ignorelist_create (1);
82 if (il_fstype == NULL)
83 il_fstype = ignorelist_create (1);
85 return (0);
86 }
88 static int df_config (const char *key, const char *value)
89 {
90 df_init ();
92 if (strcasecmp (key, "Device") == 0)
93 {
94 if (ignorelist_add (il_device, value))
95 return (1);
96 return (0);
97 }
98 else if (strcasecmp (key, "MountPoint") == 0)
99 {
100 if (ignorelist_add (il_mountpoint, value))
101 return (1);
102 return (0);
103 }
104 else if (strcasecmp (key, "FSType") == 0)
105 {
106 if (ignorelist_add (il_fstype, value))
107 return (1);
108 return (0);
109 }
110 else if (strcasecmp (key, "IgnoreSelected") == 0)
111 {
112 if ((strcasecmp (value, "True") == 0)
113 || (strcasecmp (value, "Yes") == 0)
114 || (strcasecmp (value, "On") == 0))
115 {
116 ignorelist_set_invert (il_device, 0);
117 ignorelist_set_invert (il_mountpoint, 0);
118 ignorelist_set_invert (il_fstype, 0);
119 }
120 else
121 {
122 ignorelist_set_invert (il_device, 1);
123 ignorelist_set_invert (il_mountpoint, 1);
124 ignorelist_set_invert (il_fstype, 1);
125 }
126 return (0);
127 }
129 return (-1);
130 }
132 static void df_submit (char *df_name,
133 gauge_t df_used,
134 gauge_t df_free)
135 {
136 value_t values[2];
137 value_list_t vl = VALUE_LIST_INIT;
139 values[0].gauge = df_used;
140 values[1].gauge = df_free;
142 vl.values = values;
143 vl.values_len = 2;
144 vl.time = time (NULL);
145 strcpy (vl.host, hostname_g);
146 strcpy (vl.plugin, "df");
147 strcpy (vl.plugin_instance, "");
148 strncpy (vl.type_instance, df_name, sizeof (vl.type_instance));
150 plugin_dispatch_values ("df", &vl);
151 } /* void df_submit */
153 static int df_read (void)
154 {
155 #if HAVE_STATVFS
156 struct statvfs statbuf;
157 #elif HAVE_STATFS
158 struct statfs statbuf;
159 #endif
160 /* struct STATANYFS statbuf; */
161 cu_mount_t *mnt_list;
162 cu_mount_t *mnt_ptr;
164 unsigned long long blocksize;
165 gauge_t df_free;
166 gauge_t df_used;
167 char mnt_name[256];
169 mnt_list = NULL;
170 if (cu_mount_getlist (&mnt_list) == NULL)
171 return (-1);
173 for (mnt_ptr = mnt_list; mnt_ptr != NULL; mnt_ptr = mnt_ptr->next)
174 {
175 if (STATANYFS (mnt_ptr->dir, &statbuf) < 0)
176 {
177 char errbuf[1024];
178 ERROR ("statv?fs failed: %s",
179 sstrerror (errno, errbuf,
180 sizeof (errbuf)));
181 continue;
182 }
184 if (!statbuf.f_blocks)
185 continue;
187 blocksize = BLOCKSIZE(statbuf);
188 df_free = statbuf.f_bfree * blocksize;
189 df_used = (statbuf.f_blocks - statbuf.f_bfree) * blocksize;
191 if (strcmp (mnt_ptr->dir, "/") == 0)
192 {
193 strncpy (mnt_name, "root", sizeof (mnt_name));
194 }
195 else
196 {
197 int i, len;
199 strncpy (mnt_name, mnt_ptr->dir + 1, sizeof (mnt_name));
200 len = strlen (mnt_name);
202 for (i = 0; i < len; i++)
203 if (mnt_name[i] == '/')
204 mnt_name[i] = '-';
205 }
207 if (ignorelist_match (il_device,
208 (mnt_ptr->spec_device != NULL)
209 ? mnt_ptr->spec_device
210 : mnt_ptr->device))
211 continue;
212 if (ignorelist_match (il_mountpoint, mnt_ptr->dir))
213 continue;
214 if (ignorelist_match (il_fstype, mnt_ptr->type))
215 continue;
217 df_submit (mnt_name, df_used, df_free);
218 }
220 cu_mount_freelist (mnt_list);
222 return (0);
223 } /* int df_read */
224 #endif /* DF_HAVE_READ */
226 void module_register (modreg_e load)
227 {
228 if (load & MR_DATASETS)
229 plugin_register_data_set (&ds);
231 #if DF_HAVE_READ
232 if (load & MR_READ)
233 {
234 plugin_register_config ("df", df_config,
235 config_keys, config_keys_num);
236 plugin_register_init ("df", df_init);
237 plugin_register_read ("df", df_read);
238 }
239 #endif
240 } /* void module_register */