| File: | src/sbin/tunefs/tunefs.c |
| Warning: | line 331, column 3 Value stored to 'devicep' is never read |
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| 1 | /* $OpenBSD: tunefs.c,v 1.41 2016/05/28 23:44:27 tb Exp $ */ |
| 2 | /* $NetBSD: tunefs.c,v 1.33 2005/01/19 20:46:16 xtraeme Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1983, 1993 |
| 6 | * The Regents of the University of California. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the University nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * tunefs: change layout parameters to an existing file system. |
| 35 | */ |
| 36 | #include <sys/param.h> /* DEV_BSIZE MAXBSIZE */ |
| 37 | |
| 38 | #include <ufs/ufs/dinode.h> |
| 39 | #include <ufs/ffs/fs.h> |
| 40 | #include <ufs/ffs/ffs_extern.h> |
| 41 | |
| 42 | #include <err.h> |
| 43 | #include <errno(*__errno()).h> |
| 44 | #include <fcntl.h> |
| 45 | #include <fstab.h> |
| 46 | #include <paths.h> |
| 47 | #include <stdio.h> |
| 48 | #include <stdlib.h> |
| 49 | #include <string.h> |
| 50 | #include <unistd.h> |
| 51 | #include <limits.h> |
| 52 | #include <util.h> |
| 53 | |
| 54 | /* the optimization warning string template */ |
| 55 | #define OPTWARN"should optimize for %s with minfree %s %d%%" "should optimize for %s with minfree %s %d%%" |
| 56 | |
| 57 | union { |
| 58 | struct fs sb; |
| 59 | char pad[MAXBSIZE(64 * 1024)]; |
| 60 | } sbun; |
| 61 | #define sblocksbun.sb sbun.sb |
| 62 | char buf[MAXBSIZE(64 * 1024)]; |
| 63 | |
| 64 | int fi; |
| 65 | int is_ufs2 = 0; |
| 66 | off_t sblockloc; |
| 67 | |
| 68 | static off_t sblock_try[] = SBLOCKSEARCH{ 65536, 8192, 262144, -1 }; |
| 69 | |
| 70 | static void bwrite(daddr_t, char *, int, const char *); |
| 71 | static void bread(daddr_t, char *, int, const char *); |
| 72 | static int getnum(const char *, const char *, int, int); |
| 73 | static void getsb(struct fs *, const char *); |
| 74 | static int openpartition(char *, int, char **); |
| 75 | static void usage(void); |
| 76 | |
| 77 | int |
| 78 | main(int argc, char *argv[]) |
| 79 | { |
| 80 | #define OPTSTRING"AFNe:g:h:m:o:" "AFNe:g:h:m:o:" |
| 81 | int i, ch, Aflag, Fflag, Nflag, openflags; |
| 82 | char *special; |
| 83 | const char *chg[2]; |
| 84 | int maxbpg, minfree, optim; |
| 85 | int avgfilesize, avgfpdir; |
| 86 | |
| 87 | Aflag = Fflag = Nflag = 0; |
| 88 | maxbpg = minfree = optim = -1; |
| 89 | avgfilesize = avgfpdir = -1; |
| 90 | chg[FS_OPTSPACE1] = "space"; |
| 91 | chg[FS_OPTTIME0] = "time"; |
| 92 | |
| 93 | while ((ch = getopt(argc, argv, OPTSTRING"AFNe:g:h:m:o:")) != -1) { |
| 94 | switch (ch) { |
| 95 | |
| 96 | case 'A': |
| 97 | Aflag = 1; |
| 98 | break; |
| 99 | |
| 100 | case 'F': |
| 101 | Fflag = 1; |
| 102 | break; |
| 103 | |
| 104 | case 'N': |
| 105 | Nflag = 1; |
| 106 | break; |
| 107 | |
| 108 | case 'e': |
| 109 | maxbpg = getnum(optarg, |
| 110 | "maximum blocks per file in a cylinder group", |
| 111 | 1, INT_MAX2147483647); |
| 112 | break; |
| 113 | |
| 114 | case 'g': |
| 115 | avgfilesize = getnum(optarg, |
| 116 | "average file size", 1, INT_MAX2147483647); |
| 117 | break; |
| 118 | |
| 119 | case 'h': |
| 120 | avgfpdir = getnum(optarg, |
| 121 | "expected number of files per directory", |
| 122 | 1, INT_MAX2147483647); |
| 123 | break; |
| 124 | |
| 125 | case 'm': |
| 126 | minfree = getnum(optarg, |
| 127 | "minimum percentage of free space", 0, 99); |
| 128 | break; |
| 129 | |
| 130 | case 'o': |
| 131 | if (strcmp(optarg, chg[FS_OPTSPACE1]) == 0) |
| 132 | optim = FS_OPTSPACE1; |
| 133 | else if (strcmp(optarg, chg[FS_OPTTIME0]) == 0) |
| 134 | optim = FS_OPTTIME0; |
| 135 | else |
| 136 | errx(10, |
| 137 | "bad %s (options are `space' or `time')", |
| 138 | "optimization preference"); |
| 139 | break; |
| 140 | |
| 141 | default: |
| 142 | usage(); |
| 143 | } |
| 144 | } |
| 145 | argc -= optind; |
| 146 | argv += optind; |
| 147 | if (argc != 1) |
| 148 | usage(); |
| 149 | |
| 150 | special = argv[0]; |
| 151 | openflags = Nflag ? O_RDONLY0x0000 : O_RDWR0x0002; |
| 152 | if (Fflag) |
| 153 | fi = open(special, openflags); |
| 154 | else |
| 155 | fi = openpartition(special, openflags, &special); |
| 156 | if (fi == -1) |
| 157 | err(1, "%s", special); |
| 158 | |
| 159 | if (pledge("stdio", NULL((void *)0)) == -1) |
| 160 | err(1, "pledge"); |
| 161 | |
| 162 | getsb(&sblocksbun.sb, special); |
| 163 | |
| 164 | #define CHANGEVAL(old, new, type, suffix)do if ((new) != -1) { if ((new) == (old)) warnx("%s remains unchanged at %d%s" , (type), (old), (suffix)); else { warnx("%s changes from %d%s to %d%s" , (type), (old), (suffix), (new), (suffix)); (old) = (new); } } while ( 0) do \ |
| 165 | if ((new) != -1) { \ |
| 166 | if ((new) == (old)) \ |
| 167 | warnx("%s remains unchanged at %d%s", \ |
| 168 | (type), (old), (suffix)); \ |
| 169 | else { \ |
| 170 | warnx("%s changes from %d%s to %d%s", \ |
| 171 | (type), (old), (suffix), (new), (suffix)); \ |
| 172 | (old) = (new); \ |
| 173 | } \ |
| 174 | } while (/* CONSTCOND */0) |
| 175 | |
| 176 | warnx("tuning %s", special); |
| 177 | CHANGEVAL(sblock.fs_maxbpg, maxbpg,do if ((maxbpg) != -1) { if ((maxbpg) == (sbun.sb.fs_maxbpg)) warnx("%s remains unchanged at %d%s", ("maximum blocks per file in a cylinder group" ), (sbun.sb.fs_maxbpg), ("")); else { warnx("%s changes from %d%s to %d%s" , ("maximum blocks per file in a cylinder group"), (sbun.sb.fs_maxbpg ), (""), (maxbpg), ("")); (sbun.sb.fs_maxbpg) = (maxbpg); } } while ( 0) |
| 178 | "maximum blocks per file in a cylinder group", "")do if ((maxbpg) != -1) { if ((maxbpg) == (sbun.sb.fs_maxbpg)) warnx("%s remains unchanged at %d%s", ("maximum blocks per file in a cylinder group" ), (sbun.sb.fs_maxbpg), ("")); else { warnx("%s changes from %d%s to %d%s" , ("maximum blocks per file in a cylinder group"), (sbun.sb.fs_maxbpg ), (""), (maxbpg), ("")); (sbun.sb.fs_maxbpg) = (maxbpg); } } while ( 0); |
| 179 | CHANGEVAL(sblock.fs_minfree, minfree,do if ((minfree) != -1) { if ((minfree) == (sbun.sb.fs_minfree )) warnx("%s remains unchanged at %d%s", ("minimum percentage of free space" ), (sbun.sb.fs_minfree), ("%")); else { warnx("%s changes from %d%s to %d%s" , ("minimum percentage of free space"), (sbun.sb.fs_minfree), ("%"), (minfree), ("%")); (sbun.sb.fs_minfree) = (minfree); } } while ( 0) |
| 180 | "minimum percentage of free space", "%")do if ((minfree) != -1) { if ((minfree) == (sbun.sb.fs_minfree )) warnx("%s remains unchanged at %d%s", ("minimum percentage of free space" ), (sbun.sb.fs_minfree), ("%")); else { warnx("%s changes from %d%s to %d%s" , ("minimum percentage of free space"), (sbun.sb.fs_minfree), ("%"), (minfree), ("%")); (sbun.sb.fs_minfree) = (minfree); } } while ( 0); |
| 181 | if (minfree != -1) { |
| 182 | if (minfree >= MINFREE5 && |
| 183 | sblocksbun.sb.fs_optim == FS_OPTSPACE1) |
| 184 | warnx(OPTWARN"should optimize for %s with minfree %s %d%%", "time", ">=", MINFREE5); |
| 185 | if (minfree < MINFREE5 && |
| 186 | sblocksbun.sb.fs_optim == FS_OPTTIME0) |
| 187 | warnx(OPTWARN"should optimize for %s with minfree %s %d%%", "space", "<", MINFREE5); |
| 188 | } |
| 189 | if (optim != -1) { |
| 190 | if (sblocksbun.sb.fs_optim == optim) { |
| 191 | warnx("%s remains unchanged as %s", |
| 192 | "optimization preference", |
| 193 | chg[optim]); |
| 194 | } else { |
| 195 | warnx("%s changes from %s to %s", |
| 196 | "optimization preference", |
| 197 | chg[sblocksbun.sb.fs_optim], chg[optim]); |
| 198 | sblocksbun.sb.fs_optim = optim; |
| 199 | if (sblocksbun.sb.fs_minfree >= MINFREE5 && |
| 200 | optim == FS_OPTSPACE1) |
| 201 | warnx(OPTWARN"should optimize for %s with minfree %s %d%%", "time", ">=", MINFREE5); |
| 202 | if (sblocksbun.sb.fs_minfree < MINFREE5 && |
| 203 | optim == FS_OPTTIME0) |
| 204 | warnx(OPTWARN"should optimize for %s with minfree %s %d%%", "space", "<", MINFREE5); |
| 205 | } |
| 206 | } |
| 207 | CHANGEVAL(sblock.fs_avgfilesize, avgfilesize,do if ((avgfilesize) != -1) { if ((avgfilesize) == (sbun.sb.fs_avgfilesize )) warnx("%s remains unchanged at %d%s", ("average file size" ), (sbun.sb.fs_avgfilesize), ("")); else { warnx("%s changes from %d%s to %d%s" , ("average file size"), (sbun.sb.fs_avgfilesize), (""), (avgfilesize ), ("")); (sbun.sb.fs_avgfilesize) = (avgfilesize); } } while ( 0) |
| 208 | "average file size", "")do if ((avgfilesize) != -1) { if ((avgfilesize) == (sbun.sb.fs_avgfilesize )) warnx("%s remains unchanged at %d%s", ("average file size" ), (sbun.sb.fs_avgfilesize), ("")); else { warnx("%s changes from %d%s to %d%s" , ("average file size"), (sbun.sb.fs_avgfilesize), (""), (avgfilesize ), ("")); (sbun.sb.fs_avgfilesize) = (avgfilesize); } } while ( 0); |
| 209 | CHANGEVAL(sblock.fs_avgfpdir, avgfpdir,do if ((avgfpdir) != -1) { if ((avgfpdir) == (sbun.sb.fs_avgfpdir )) warnx("%s remains unchanged at %d%s", ("expected number of files per directory" ), (sbun.sb.fs_avgfpdir), ("")); else { warnx("%s changes from %d%s to %d%s" , ("expected number of files per directory"), (sbun.sb.fs_avgfpdir ), (""), (avgfpdir), ("")); (sbun.sb.fs_avgfpdir) = (avgfpdir ); } } while ( 0) |
| 210 | "expected number of files per directory", "")do if ((avgfpdir) != -1) { if ((avgfpdir) == (sbun.sb.fs_avgfpdir )) warnx("%s remains unchanged at %d%s", ("expected number of files per directory" ), (sbun.sb.fs_avgfpdir), ("")); else { warnx("%s changes from %d%s to %d%s" , ("expected number of files per directory"), (sbun.sb.fs_avgfpdir ), (""), (avgfpdir), ("")); (sbun.sb.fs_avgfpdir) = (avgfpdir ); } } while ( 0); |
| 211 | |
| 212 | if (Nflag) { |
| 213 | fprintf(stdout(&__sF[1]), "tunefs: current settings of %s\n", special); |
| 214 | fprintf(stdout(&__sF[1]), "\tmaximum contiguous block count %d\n", |
| 215 | sblocksbun.sb.fs_maxcontig); |
| 216 | fprintf(stdout(&__sF[1]), |
| 217 | "\tmaximum blocks per file in a cylinder group %d\n", |
| 218 | sblocksbun.sb.fs_maxbpg); |
| 219 | fprintf(stdout(&__sF[1]), "\tminimum percentage of free space %d%%\n", |
| 220 | sblocksbun.sb.fs_minfree); |
| 221 | fprintf(stdout(&__sF[1]), "\toptimization preference: %s\n", |
| 222 | chg[sblocksbun.sb.fs_optim]); |
| 223 | fprintf(stdout(&__sF[1]), "\taverage file size: %d\n", |
| 224 | sblocksbun.sb.fs_avgfilesize); |
| 225 | fprintf(stdout(&__sF[1]), |
| 226 | "\texpected number of files per directory: %d\n", |
| 227 | sblocksbun.sb.fs_avgfpdir); |
| 228 | fprintf(stdout(&__sF[1]), "tunefs: no changes made\n"); |
| 229 | exit(0); |
| 230 | } |
| 231 | |
| 232 | memcpy(buf, (char *)&sblocksbun.sb, SBLOCKSIZE8192); |
| 233 | bwrite(sblockloc, buf, SBLOCKSIZE8192, special); |
| 234 | if (Aflag) |
| 235 | for (i = 0; i < sblocksbun.sb.fs_ncg; i++) |
| 236 | bwrite(fsbtodb(&sblock, cgsblock(&sblock, i))((((((daddr_t)(&sbun.sb)->fs_fpg * (i)) + (&sbun.sb )->fs_cgoffset * ((i) & ~((&sbun.sb)->fs_cgmask ))) + (&sbun.sb)->fs_sblkno)) << (&sbun.sb)-> fs_fsbtodb), |
| 237 | buf, SBLOCKSIZE8192, special); |
| 238 | close(fi); |
| 239 | exit(0); |
| 240 | } |
| 241 | |
| 242 | static int |
| 243 | getnum(const char *num, const char *desc, int min, int max) |
| 244 | { |
| 245 | int n; |
| 246 | const char *errstr; |
| 247 | |
| 248 | n = strtonum(num, min, max, &errstr); |
| 249 | if (errstr != NULL((void *)0)) |
| 250 | errx(1, "Invalid number `%s' for %s: %s", num, desc, errstr); |
| 251 | return (n); |
| 252 | } |
| 253 | |
| 254 | static void |
| 255 | usage(void) |
| 256 | { |
| 257 | extern char *__progname; |
| 258 | |
| 259 | fprintf(stderr(&__sF[2]), |
| 260 | "usage: %s [-AFN] [-e maxbpg] [-g avgfilesize] " |
| 261 | "[-h avgfpdir] [-m minfree]\n" |
| 262 | "\t[-o optimize_preference] special | filesys\n", |
| 263 | __progname); |
| 264 | |
| 265 | exit(2); |
| 266 | } |
| 267 | |
| 268 | static void |
| 269 | getsb(struct fs *fs, const char *file) |
| 270 | { |
| 271 | int i; |
| 272 | |
| 273 | for (i = 0; ; i++) { |
| 274 | if (sblock_try[i] == -1) |
| 275 | errx(5, "cannot find filesystem superblock"); |
| 276 | bread(sblock_try[i] / DEV_BSIZE(1 << 9), (char *)fs, SBLOCKSIZE8192, file); |
| 277 | switch(fs->fs_magic) { |
| 278 | case FS_UFS2_MAGIC0x19540119: |
| 279 | is_ufs2 = 1; |
| 280 | /*FALLTHROUGH*/ |
| 281 | case FS_UFS1_MAGIC0x011954: |
| 282 | break; |
| 283 | default: |
| 284 | continue; |
| 285 | } |
| 286 | if (!is_ufs2 && sblock_try[i] == SBLOCK_UFS265536) |
| 287 | continue; |
| 288 | if ((is_ufs2 || fs->fs_flags & FS_FLAGS_UPDATED0x80) |
| 289 | && fs->fs_sblockloc != sblock_try[i]) |
| 290 | continue; |
| 291 | break; |
| 292 | } |
| 293 | |
| 294 | sblockloc = sblock_try[i] / DEV_BSIZE(1 << 9); |
| 295 | } |
| 296 | |
| 297 | static void |
| 298 | bwrite(daddr_t blk, char *buffer, int size, const char *file) |
| 299 | { |
| 300 | if (pwrite(fi, buffer, size, blk * DEV_BSIZE(1 << 9)) != size) |
| 301 | err(7, "%s: writing %d bytes @ %lld", file, size, |
| 302 | (long long)(blk * DEV_BSIZE(1 << 9))); |
| 303 | } |
| 304 | |
| 305 | static void |
| 306 | bread(daddr_t blk, char *buffer, int cnt, const char *file) |
| 307 | { |
| 308 | if ((pread(fi, buffer, cnt, (off_t)blk * DEV_BSIZE(1 << 9))) != cnt) |
| 309 | errx(5, "%s: reading %d bytes @ %lld", file, cnt, |
| 310 | (long long)(blk * DEV_BSIZE(1 << 9))); |
| 311 | } |
| 312 | |
| 313 | static int |
| 314 | openpartition(char *name, int flags, char **devicep) |
| 315 | { |
| 316 | char rawspec[PATH_MAX1024], *p; |
| 317 | struct fstab *fs; |
| 318 | int fd; |
| 319 | |
| 320 | fs = getfsfile(name); |
| 321 | if (fs) { |
| 322 | if ((p = strrchr(fs->fs_spec, '/')) != NULL((void *)0)) { |
| 323 | snprintf(rawspec, sizeof(rawspec), "%.*s/r%s", |
| 324 | (int)(p - fs->fs_spec), fs->fs_spec, p + 1); |
| 325 | name = rawspec; |
| 326 | } else |
| 327 | name = fs->fs_spec; |
| 328 | } |
| 329 | fd = opendev(name, flags, 0, devicep); |
| 330 | if (fd == -1 && errno(*__errno()) == ENOENT2) |
| 331 | devicep = &name; |
Value stored to 'devicep' is never read | |
| 332 | return (fd); |
| 333 | } |