1 /* $NetBSD: getmntinfo.c,v 1.1 2012/03/17 16:33:11 jruoho Exp $ */
2 /*
3 * Copyright (c) 2007 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
19 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/param.h>
29 #include <sys/ucred.h>
30 #include <sys/mount.h>
31
32 #include <err.h>
33 #include <stdlib.h>
34 #include <string.h>
35
36 #define KB * 1024
37 #define MB * 1024 KB
38 #define GB * 1024 MB
39
40 static struct statvfs *getnewstatvfs(void);
41 static void other_variants(const struct statvfs *, const int *, int,
42 const int *, int);
43 static void setup_filer(void);
44 static void setup_ld0g(void);
45 static void setup_strpct(void);
46
47 static struct statvfs *allstatvfs;
48 static int sftotal, sfused;
49
50 struct statvfs *
getnewstatvfs(void)51 getnewstatvfs(void)
52 {
53
54 if (sftotal == sfused) {
55 sftotal = sftotal ? sftotal * 2 : 1;
56 allstatvfs = realloc(allstatvfs,
57 sftotal * sizeof(struct statvfs));
58 if (allstatvfs == NULL)
59 err(EXIT_FAILURE, "realloc");
60 }
61
62 return (&allstatvfs[sfused++]);
63 }
64
65 void
other_variants(const struct statvfs * tmpl,const int * minfree,int minfreecnt,const int * consumed,int consumedcnt)66 other_variants(const struct statvfs *tmpl, const int *minfree, int minfreecnt,
67 const int *consumed, int consumedcnt)
68 {
69 int64_t total, used;
70 struct statvfs *sf;
71 int i, j;
72
73 for (i = 0; i < minfreecnt; i++)
74 for (j = 0; j < consumedcnt; j++) {
75 sf = getnewstatvfs();
76 *sf = *tmpl;
77 total = (int64_t)(u_long)sf->f_blocks * sf->f_bsize;
78 used = total * consumed[j] / 100;
79 sf->f_bfree = (total - used) / sf->f_bsize;
80 sf->f_bavail = (total * (100 - minfree[i]) / 100 -
81 used) / (int)sf->f_bsize;
82 sf->f_bresvd = sf->f_bfree - sf->f_bavail;
83 }
84 }
85
86 /*
87 * Parameter taken from:
88 * http://mail-index.NetBSD.org/tech-userlevel/2004/03/24/0001.html
89 */
90 void
setup_filer(void)91 setup_filer(void)
92 {
93 static const struct statvfs tmpl = {
94 #define BSIZE 512
95 #define TOTAL 1147ULL GB
96 #define USED 132ULL MB
97 .f_bsize = BSIZE,
98 .f_frsize = BSIZE,
99 .f_blocks = TOTAL / BSIZE,
100 .f_bfree = (TOTAL - USED) / BSIZE,
101 .f_bavail = (TOTAL - USED) / BSIZE,
102 .f_bresvd = 0,
103 .f_mntfromname = "filer:/",
104 .f_mntonname = "/filer",
105 #undef USED
106 #undef TOTAL
107 #undef BSIZE
108 };
109 static const int minfree[] = { 0, 5, 10, 15, };
110 static const int consumed[] = { 0, 20, 60, 95, 100 };
111
112 *getnewstatvfs() = tmpl;
113 other_variants(&tmpl, minfree, sizeof(minfree) / sizeof(minfree[0]),
114 consumed, sizeof(consumed) / sizeof(consumed[0]));
115 }
116
117 /*
118 * Parameter taken from:
119 * http://mail-index.NetBSD.org/current-users/2004/03/01/0038.html
120 */
121 void
setup_ld0g(void)122 setup_ld0g(void)
123 {
124 static const struct statvfs tmpl = {
125 #define BSIZE 4096 /* Guess */
126 #define TOTAL 1308726116ULL KB
127 #define USED 17901268ULL KB
128 #define AVAIL 1225388540ULL KB
129 .f_bsize = BSIZE,
130 .f_frsize = BSIZE,
131 .f_blocks = TOTAL / BSIZE,
132 .f_bfree = (TOTAL - USED) / BSIZE,
133 .f_bavail = AVAIL / BSIZE,
134 .f_bresvd = (TOTAL - USED) / BSIZE - AVAIL / BSIZE,
135 .f_mntfromname = "/dev/ld0g",
136 .f_mntonname = "/anon-root",
137 #undef AVAIL
138 #undef USED
139 #undef TOTAL
140 #undef BSIZE
141 };
142 static const int minfree[] = { 0, 5, 10, 15, };
143 static const int consumed[] = { 0, 20, 60, 95, 100 };
144
145 *getnewstatvfs() = tmpl;
146 other_variants(&tmpl, minfree, sizeof(minfree) / sizeof(minfree[0]),
147 consumed, sizeof(consumed) / sizeof(consumed[0]));
148 }
149
150 /*
151 * Test of strpct() with huge number.
152 */
153 void
setup_strpct(void)154 setup_strpct(void)
155 {
156 static const struct statvfs tmpl = {
157 #define BSIZE 4096 /* Guess */
158 #define TOTAL 0x4ffffffffULL KB
159 #define USED (TOTAL / 2)
160 #define AVAIL (TOTAL / 2)
161 .f_bsize = BSIZE,
162 .f_frsize = BSIZE,
163 .f_blocks = TOTAL / BSIZE,
164 .f_bfree = (TOTAL - USED) / BSIZE,
165 .f_bavail = AVAIL / BSIZE,
166 .f_bresvd = (TOTAL - USED) / BSIZE - AVAIL / BSIZE,
167 .f_mntfromname = "/dev/strpct",
168 .f_mntonname = "/strpct",
169 #undef AVAIL
170 #undef USED
171 #undef TOTAL
172 #undef BSIZE
173 };
174
175 *getnewstatvfs() = tmpl;
176 }
177
178 /*
179 * Parameter taken from:
180 * http://www.netbsd.org/cgi-bin/query-pr-single.pl?number=23600
181 */
182 static void
setup_pr23600(void)183 setup_pr23600(void)
184 {
185 static const struct statvfs tmpl = {
186 #define BSIZE 512
187 #define TOTAL 20971376ULL
188 #define USED 5719864ULL
189 #define AVAIL 15251512ULL
190 .f_bsize = BSIZE,
191 .f_frsize = BSIZE,
192 .f_blocks = TOTAL,
193 .f_bfree = TOTAL - USED,
194 .f_bavail = AVAIL,
195 .f_bresvd = TOTAL - USED - AVAIL,
196 .f_mntfromname = "/dev/wd0e",
197 .f_mntonname = "/mount/windows/C",
198 #undef AVAIL
199 #undef USED
200 #undef TOTAL
201 #undef BSIZE
202 };
203
204 *getnewstatvfs() = tmpl;
205 }
206
207 int
getmntinfo(struct statvfs ** mntbuf,int flags)208 getmntinfo(struct statvfs **mntbuf, int flags)
209 {
210
211 setup_filer();
212 setup_ld0g();
213 setup_strpct();
214 setup_pr23600();
215
216 *mntbuf = allstatvfs;
217 return (sfused);
218 }
219