v7fs_estimate.c revision 1.2
1 /* $NetBSD: v7fs_estimate.c,v 1.2 2011/08/10 11:31:49 uch Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #if HAVE_NBTOOL_CONFIG_H 33 #include "nbtool_config.h" 34 #endif 35 36 #include <sys/cdefs.h> 37 #if defined(__RCSID) && !defined(__lint) 38 __RCSID("$NetBSD: v7fs_estimate.c,v 1.2 2011/08/10 11:31:49 uch Exp $"); 39 #endif /* !__lint */ 40 41 #include <stdio.h> 42 #include <string.h> 43 #include <stdlib.h> 44 #include <errno.h> 45 46 #if !HAVE_NBTOOL_CONFIG_H 47 #include <sys/mount.h> /*MAXPATHLEN */ 48 #endif 49 50 #include "makefs.h" 51 #include "v7fs.h" 52 #include "v7fs_impl.h" 53 #include "v7fs_inode.h" 54 #include "v7fs_datablock.h" 55 #include "v7fs_makefs.h" 56 57 struct v7fs_geometry { 58 v7fs_daddr_t ndatablock; 59 v7fs_ino_t ninode; 60 v7fs_daddr_t npuredatablk; 61 }; 62 63 #define VPRINTF(fmt, args...) { if (v7fs_newfs_verbose) printf(fmt, ##args); } 64 65 static int 66 v7fs_datablock_size(off_t sz, v7fs_daddr_t *nblk) 67 { 68 struct v7fs_daddr_map map; 69 int error = 0; 70 71 if (sz == 0) { 72 *nblk = 0; 73 return 0; 74 } 75 76 if ((error = v7fs_datablock_addr(sz, &map))) { 77 return error; 78 } 79 switch (map.level) { 80 case 0: /* Direct */ 81 *nblk = map.index[0] + 1; 82 break; 83 case 1: 84 *nblk = V7FS_NADDR_DIRECT + /*direct */ 85 1/*addr[V7FS_NADDR_INDEX1]*/ + map.index[0] + 1; 86 break; 87 case 2: 88 *nblk = V7FS_NADDR_DIRECT + /*direct */ 89 1/*addr[V7FS_NADDR_INDEX1]*/ + 90 V7FS_DADDR_PER_BLOCK +/*idx1 */ 91 1/*addr[V7FS_NADDR_INDEX2]*/ + 92 map.index[0] + /* # of idx2 index block(filled) */ 93 map.index[0] * V7FS_DADDR_PER_BLOCK + /* of its datablocks*/ 94 1 + /*current idx2 indexblock */ 95 map.index[1] + 1; 96 break; 97 case 3: 98 *nblk = V7FS_NADDR_DIRECT + /*direct */ 99 1/*addr[V7FS_NADDR_INDEX1]*/ + 100 V7FS_DADDR_PER_BLOCK +/*idx1 */ 101 1/*addr[V7FS_NADDR_INDEX2]*/ + 102 V7FS_DADDR_PER_BLOCK + /* # of idx2 index block */ 103 V7FS_DADDR_PER_BLOCK * V7FS_DADDR_PER_BLOCK + 104 /*idx2 datablk */ 105 1/*addr[v7FS_NADDR_INDEX3*/ + 106 map.index[0] + /* # of lv1 index block(filled) */ 107 map.index[0] * V7FS_DADDR_PER_BLOCK * V7FS_DADDR_PER_BLOCK + 108 1 + /*lv1 */ 109 map.index[1] + /* #of lv2 index block(filled) */ 110 map.index[1] * V7FS_DADDR_PER_BLOCK + /*lv2 datablock */ 111 1 + /* current lv2 index block */ 112 map.index[2] + 1; /*filled datablock */ 113 break; 114 default: 115 *nblk = 0; 116 error = EINVAL; 117 break; 118 } 119 120 return error; 121 } 122 123 static int 124 estimate_size_walk(fsnode *root, char *dir, struct v7fs_geometry *geom) 125 { 126 fsnode *cur; 127 int nentries; 128 size_t pathlen = strlen(dir); 129 char *mydir = dir + pathlen; 130 fsinode *fnode; 131 v7fs_daddr_t nblk; 132 int n; 133 off_t sz; 134 135 for (cur = root, nentries = 0; cur != NULL; cur = cur->next, 136 nentries++, geom->ninode++) { 137 switch (cur->type & S_IFMT) { 138 default: 139 break; 140 case S_IFDIR: 141 if (!cur->child) 142 break; 143 mydir[0] = '/'; 144 strncpy(&mydir[1], cur->name, MAXPATHLEN - pathlen); 145 n = estimate_size_walk(cur->child, dir, geom); 146 sz = (n + 1/*..*/) * sizeof(struct v7fs_dirent); 147 v7fs_datablock_size(sz, &nblk); 148 mydir[0] = '\0'; 149 geom->ndatablock += nblk; 150 geom->npuredatablk += 151 V7FS_ROUND_BSIZE(sz) >> V7FS_BSHIFT; 152 break; 153 case S_IFREG: 154 fnode = cur->inode; 155 if (!(fnode->flags & FI_SIZED)) { /*Skip hard-link */ 156 sz = fnode->st.st_size; 157 v7fs_datablock_size(sz, &nblk); 158 geom->ndatablock += nblk; 159 geom->npuredatablk += 160 V7FS_ROUND_BSIZE(sz) >> V7FS_BSHIFT; 161 fnode->flags |= FI_SIZED; 162 } 163 164 break; 165 case S_IFLNK: 166 nblk = V7FSBSD_MAXSYMLINKLEN >> V7FS_BSHIFT; 167 geom->ndatablock += nblk; 168 geom->npuredatablk += nblk; 169 break; 170 } 171 } 172 173 return nentries; 174 } 175 176 static v7fs_daddr_t 177 calculate_fs_size(const struct v7fs_geometry *geom) 178 { 179 v7fs_daddr_t fs_blk, ilist_blk; 180 181 ilist_blk = V7FS_ROUND_BSIZE(geom->ninode * 182 sizeof(struct v7fs_inode_diskimage)) >> V7FS_BSHIFT; 183 fs_blk = geom->ndatablock + ilist_blk + V7FS_ILIST_SECTOR; 184 185 VPRINTF("datablock:%d ilistblock:%d total:%d\n", geom->ndatablock, 186 ilist_blk, fs_blk); 187 188 return fs_blk; 189 } 190 191 static void 192 determine_fs_size(fsinfo_t *fsopts, struct v7fs_geometry *geom) 193 { 194 v7fs_daddr_t nblk = geom->ndatablock; 195 v7fs_daddr_t fsblk; 196 int32_t nfiles = geom->ninode; 197 int n; 198 199 VPRINTF("size=%lld inodes=%lld fd=%d superb=%p onlyspec=%d\n", 200 (long long)fsopts->size, (long long)fsopts->inodes, fsopts->fd, 201 fsopts->superblock, fsopts->onlyspec); 202 VPRINTF("minsize=%lld maxsize=%lld freefiles=%lld freefilepc=%d " 203 "freeblocks=%lld freeblockpc=%d sectorseize=%d\n", 204 (long long)fsopts->minsize, (long long)fsopts->maxsize, 205 (long long)fsopts->freefiles, fsopts->freefilepc, 206 (long long)fsopts->freeblocks, fsopts->freeblockpc, 207 fsopts->sectorsize); 208 209 if ((fsopts->sectorsize > 0) && (fsopts->sectorsize != V7FS_BSIZE)) 210 warnx("v7fs sector size is 512byte only. '-S %d' is ignored.", 211 fsopts->sectorsize); 212 213 /* Free inode */ 214 if (fsopts->freefiles) { 215 nfiles += fsopts->freefiles; 216 } else if ((n = fsopts->freefilepc)) { 217 nfiles += (nfiles * n) / (100 - n); 218 } 219 if (nfiles >= V7FS_INODE_MAX) { 220 errx(EXIT_FAILURE, "# of files(%d) over v7fs limit(%d).", 221 nfiles, V7FS_INODE_MAX); 222 } 223 224 /* Free datablock */ 225 if (fsopts->freeblocks) { 226 nblk += fsopts->freeblocks; 227 } else if ((n = fsopts->freeblockpc)) { 228 nblk += (nblk * n) / (100 - n); 229 } 230 231 /* Total size */ 232 geom->ndatablock = nblk; 233 geom->ninode = nfiles; 234 fsblk = calculate_fs_size(geom); 235 236 if (fsblk >= V7FS_DADDR_MAX) { 237 errx(EXIT_FAILURE, "filesystem size(%d) over v7fs limit(%d).", 238 fsblk, V7FS_DADDR_MAX); 239 } 240 241 n = fsopts->minsize >> V7FS_BSHIFT; 242 if (fsblk < n) 243 geom->ndatablock += (n - fsblk); 244 245 n = fsopts->maxsize >> V7FS_BSHIFT; 246 if (fsopts->maxsize > 0 && fsblk > n) { 247 errx(EXIT_FAILURE, "# of datablocks %d > %d", fsblk, n); 248 } 249 } 250 251 void 252 v7fs_estimate(const char *dir, fsnode *root, fsinfo_t *fsopts) 253 { 254 v7fs_opt_t *v7fs_opts = fsopts->fs_specific; 255 char path[MAXPATHLEN + 1]; 256 int ndir; 257 off_t sz; 258 v7fs_daddr_t nblk; 259 struct v7fs_geometry geom; 260 261 memset(&geom , 0, sizeof(geom)); 262 strncpy(path, dir, sizeof(path)); 263 264 /* Calculate strict size. */ 265 ndir = estimate_size_walk(root, path, &geom); 266 sz = (ndir + 1/*..*/) * sizeof(struct v7fs_dirent); 267 v7fs_datablock_size(sz, &nblk); 268 geom.ndatablock += nblk; 269 270 /* Consider options. */ 271 determine_fs_size(fsopts, &geom); 272 273 fsopts->size = calculate_fs_size(&geom) << V7FS_BSHIFT; 274 fsopts->inodes = geom.ninode; 275 v7fs_opts->npuredatablk = geom.npuredatablk; /* for progress bar */ 276 } 277
Indexes created Mon Sep 29 21:09:56 GMT 2025