1 /*
2 ** Zabbix
3 ** Copyright (C) 2001-2021 Zabbix SIA
4 **
5 ** This program is free software; you can redistribute it and/or modify
6 ** it under the terms of the GNU General Public License as published by
7 ** the Free Software Foundation; either version 2 of the License, or
8 ** (at your option) any later version.
9 **
10 ** This program is distributed in the hope that it will be useful,
11 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ** GNU General Public License for more details.
14 **
15 ** You should have received a copy of the GNU General Public License
16 ** along with this program; if not, write to the Free Software
17 ** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 **/
19
20 #include "common.h"
21 #include "sysinfo.h"
22 #include "log.h"
23
get_fs_size_stat(const char * fs,zbx_uint64_t * total,zbx_uint64_t * free,zbx_uint64_t * used,double * pfree,double * pused,char ** error)24 static int get_fs_size_stat(const char *fs, zbx_uint64_t *total, zbx_uint64_t *free,
25 zbx_uint64_t *used, double *pfree, double *pused, char **error)
26 {
27 #ifdef HAVE_SYS_STATVFS_H
28 # define ZBX_STATFS statvfs
29 # define ZBX_BSIZE f_frsize
30 #else
31 # define ZBX_STATFS statfs
32 # define ZBX_BSIZE f_bsize
33 #endif
34 struct ZBX_STATFS s;
35
36 if (0 != ZBX_STATFS(fs, &s))
37 {
38 *error = zbx_dsprintf(NULL, "Cannot obtain filesystem information: %s", zbx_strerror(errno));
39 zabbix_log(LOG_LEVEL_DEBUG,"%s failed with error: %s",__func__, *error);
40 return SYSINFO_RET_FAIL;
41 }
42
43 /* Available space could be negative (top bit set) if we hit disk space */
44 /* reserved for non-privileged users. Treat it as 0. */
45 if (0 != ZBX_IS_TOP_BIT_SET(s.f_bavail))
46 s.f_bavail = 0;
47
48 if (NULL != total)
49 *total = (zbx_uint64_t)s.f_blocks * s.ZBX_BSIZE;
50
51 if (NULL != free)
52 *free = (zbx_uint64_t)s.f_bavail * s.ZBX_BSIZE;
53
54 if (NULL != used)
55 *used = (zbx_uint64_t)(s.f_blocks - s.f_bfree) * s.ZBX_BSIZE;
56
57 if (NULL != pfree)
58 {
59 if (0 != s.f_blocks - s.f_bfree + s.f_bavail)
60 *pfree = (double)(100.0 * s.f_bavail) / (s.f_blocks - s.f_bfree + s.f_bavail);
61 else
62 *pfree = 0;
63 }
64
65 if (NULL != pused)
66 {
67 if (0 != s.f_blocks - s.f_bfree + s.f_bavail)
68 *pused = 100.0 - (double)(100.0 * s.f_bavail) / (s.f_blocks - s.f_bfree + s.f_bavail);
69 else
70 *pused = 0;
71 }
72
73 return SYSINFO_RET_OK;
74 }
75
VFS_FS_USED(const char * fs,AGENT_RESULT * result)76 static int VFS_FS_USED(const char *fs, AGENT_RESULT *result)
77 {
78 zbx_uint64_t value;
79 char *error;
80
81 if (SYSINFO_RET_OK != get_fs_size_stat(fs, NULL, NULL, &value, NULL, NULL, &error))
82 {
83 SET_MSG_RESULT(result, error);
84 return SYSINFO_RET_FAIL;
85 }
86
87 SET_UI64_RESULT(result, value);
88
89 return SYSINFO_RET_OK;
90 }
91
VFS_FS_FREE(const char * fs,AGENT_RESULT * result)92 static int VFS_FS_FREE(const char *fs, AGENT_RESULT *result)
93 {
94 zbx_uint64_t value;
95 char *error;
96
97 if (SYSINFO_RET_OK != get_fs_size_stat(fs, NULL, &value, NULL, NULL, NULL, &error))
98 {
99 SET_MSG_RESULT(result, error);
100 return SYSINFO_RET_FAIL;
101 }
102
103 SET_UI64_RESULT(result, value);
104
105 return SYSINFO_RET_OK;
106 }
107
VFS_FS_TOTAL(const char * fs,AGENT_RESULT * result)108 static int VFS_FS_TOTAL(const char *fs, AGENT_RESULT *result)
109 {
110 zbx_uint64_t value;
111 char *error;
112
113 if (SYSINFO_RET_OK != get_fs_size_stat(fs, &value, NULL, NULL, NULL, NULL, &error))
114 {
115 SET_MSG_RESULT(result, error);
116 return SYSINFO_RET_FAIL;
117 }
118
119 SET_UI64_RESULT(result, value);
120
121 return SYSINFO_RET_OK;
122 }
123
VFS_FS_PFREE(const char * fs,AGENT_RESULT * result)124 static int VFS_FS_PFREE(const char *fs, AGENT_RESULT *result)
125 {
126 double value;
127 char *error;
128
129 if (SYSINFO_RET_OK != get_fs_size_stat(fs, NULL, NULL, NULL, &value, NULL, &error))
130 {
131 SET_MSG_RESULT(result, error);
132 return SYSINFO_RET_FAIL;
133 }
134
135 SET_DBL_RESULT(result, value);
136
137 return SYSINFO_RET_OK;
138 }
139
VFS_FS_PUSED(const char * fs,AGENT_RESULT * result)140 static int VFS_FS_PUSED(const char *fs, AGENT_RESULT *result)
141 {
142 double value;
143 char *error;
144
145 if (SYSINFO_RET_OK != get_fs_size_stat(fs, NULL, NULL, NULL, NULL, &value, &error))
146 {
147 SET_MSG_RESULT(result, error);
148 return SYSINFO_RET_FAIL;
149 }
150
151 SET_DBL_RESULT(result, value);
152
153 return SYSINFO_RET_OK;
154 }
155
vfs_fs_size(AGENT_REQUEST * request,AGENT_RESULT * result)156 static int vfs_fs_size(AGENT_REQUEST *request, AGENT_RESULT *result)
157 {
158 char *fsname, *mode;
159
160 if (2 < request->nparam)
161 {
162 SET_MSG_RESULT(result, zbx_strdup(NULL, "Too many parameters."));
163 return SYSINFO_RET_FAIL;
164 }
165
166 fsname = get_rparam(request, 0);
167 mode = get_rparam(request, 1);
168
169 if (NULL == fsname || '\0' == *fsname)
170 {
171 SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid first parameter."));
172 return SYSINFO_RET_FAIL;
173 }
174
175 if (NULL == mode || '\0' == *mode || 0 == strcmp(mode, "total")) /* default parameter */
176 return VFS_FS_TOTAL(fsname, result);
177 if (0 == strcmp(mode, "free"))
178 return VFS_FS_FREE(fsname, result);
179 if (0 == strcmp(mode, "pfree"))
180 return VFS_FS_PFREE(fsname, result);
181 if (0 == strcmp(mode, "used"))
182 return VFS_FS_USED(fsname, result);
183 if (0 == strcmp(mode, "pused"))
184 return VFS_FS_PUSED(fsname, result);
185
186 SET_MSG_RESULT(result, zbx_strdup(NULL, "Invalid second parameter."));
187
188 return SYSINFO_RET_FAIL;
189 }
190
VFS_FS_SIZE(AGENT_REQUEST * request,AGENT_RESULT * result)191 int VFS_FS_SIZE(AGENT_REQUEST *request, AGENT_RESULT *result)
192 {
193 return zbx_execute_threaded_metric(vfs_fs_size, request, result);
194 }
195