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 * 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 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 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 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 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 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 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