/* $OpenBSD: newfs_ext2fs.c,v 1.29 2022/12/04 23:50:47 cheloha Exp $ */ /* $NetBSD: newfs_ext2fs.c,v 1.8 2009/03/02 10:38:13 tsutsui Exp $ */ /* * Copyright (c) 1983, 1989, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * newfs: friendly front end to mke2fs */ #include /* powerof2 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) #include "extern.h" static int64_t strsuftoi64(const char *, const char *, int64_t, int64_t, int *); static void usage(void) __dead; /* * For file systems smaller than SMALL_FSSIZE we use the S_DFL_* defaults, * otherwise if less than MEDIUM_FSSIZE use M_DFL_*, otherwise use * L_DFL_*. */ #define SMALL_FSSIZE ((4 * 1024 * 1024) / sectorsize) /* 4MB */ #define S_DFL_BSIZE 1024 #define MEDIUM_FSSIZE ((512 * 1024 * 1024) / sectorsize) /* 512MB */ #define M_DFL_BSIZE 1024 #define L_DFL_BSIZE 4096 /* * Each file system has a number of inodes statically allocated. * We allocate one inode slot per 2, 4, or 8 blocks, expecting this * to be far more than we will ever need. */ #define S_DFL_NINODE(blocks) ((blocks) / 8) #define M_DFL_NINODE(blocks) ((blocks) / 4) #define L_DFL_NINODE(blocks) ((blocks) / 2) /* * Default sector size. */ #define DFL_SECSIZE 512 int Nflag; /* run without writing file system */ int Oflag = 0; /* format as conservative REV0 by default */ int verbosity; /* amount of printf() output */ #define DEFAULT_VERBOSITY 4 /* 4 is traditional behavior of newfs(8) */ int64_t fssize; /* file system size */ uint sectorsize; /* bytes/sector */ uint16_t inodesize = EXT2_REV0_DINODE_SIZE; /* inode size */ uint fsize = 0; /* fragment size */ uint bsize = 0; /* block size */ uint minfree = MINFREE; /* free space threshold */ uint density; /* number of bytes per inode */ uint num_inodes; /* number of inodes (overrides density) */ int max_cols; char *volname = NULL; /* volume name */ static char *disktype = NULL; struct disklabel *getdisklabel(const char *, int); struct partition *getpartition(int, const char *, char *[], struct disklabel **); int main(int argc, char *argv[]) { struct statfs *mp; struct stat sb; int ch, fd, len, n, Fflag, Iflag, Zflag; char *s1, *s2, *special; const char *opstring; int byte_sized, fl; uint blocks; /* number of blocks */ struct partition *pp = NULL; struct disklabel *lp; struct winsize winsize; /* Get terminal width */ if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) == 0) max_cols = winsize.ws_col; else max_cols = 80; if (pledge("stdio rpath wpath cpath disklabel", NULL) == -1) err(1, "pledge"); Fflag = Iflag = Zflag = 0; verbosity = -1; opstring = "D:FINO:S:V:Zb:f:i:l:m:n:qs:t:v:"; byte_sized = 0; while ((ch = getopt(argc, argv, opstring)) != -1) switch (ch) { case 'D': inodesize = (uint16_t)strtol(optarg, &s1, 0); if (*s1 || (inodesize != 128 && inodesize != 256)) errx(1, "Bad inode size %d " "(only 128 and 256 supported)", inodesize); break; case 'F': Fflag = 1; break; case 'I': Iflag = 1; break; case 'N': Nflag = 1; if (verbosity == -1) verbosity = DEFAULT_VERBOSITY; break; case 'O': Oflag = strsuftoi64("format", optarg, 0, 1, NULL); break; case 'S': /* * XXX: * non-512 byte sectors almost certainly don't work. */ sectorsize = strsuftoi64("sector size", optarg, 512, 65536, NULL); if (!powerof2(sectorsize)) errx(EXIT_FAILURE, "sector size `%s' is not a power of 2.", optarg); break; case 'V': verbosity = strsuftoi64("verbose", optarg, 0, 4, NULL); break; case 'Z': Zflag = 1; break; case 'b': bsize = strsuftoi64("block size", optarg, MINBSIZE, EXT2_MAXBSIZE, NULL); break; case 'f': fsize = strsuftoi64("fragment size", optarg, MINBSIZE, EXT2_MAXBSIZE, NULL); break; case 'i': density = strsuftoi64("bytes per inode", optarg, 1, INT_MAX, NULL); break; case 'm': minfree = strsuftoi64("free space %", optarg, 0, 99, NULL); break; case 'n': num_inodes = strsuftoi64("number of inodes", optarg, 1, INT_MAX, NULL); break; case 'q': verbosity = 1; break; case 's': fssize = strsuftoi64("file system size", optarg, INT64_MIN, INT64_MAX, &byte_sized); break; case 't': /* compat with newfs -t */ break; case 'v': volname = optarg; if (volname[0] == '\0') errx(EXIT_FAILURE, "Volume name cannot be zero length"); break; default: usage(); } argc -= optind; argv += optind; if (verbosity == -1) /* Default to showing cg info */ verbosity = DEFAULT_VERBOSITY; if (argc != 1) usage(); memset(&sb, 0, sizeof(sb)); special = argv[0]; fl = Nflag ? O_RDONLY : O_RDWR; if (Fflag) { /* * It's a file system image * no label, use fixed default for sectorsize. */ if (sectorsize == 0) sectorsize = DFL_SECSIZE; /* creating image in a regular file */ if (!Nflag && fssize > 0) fl |= O_CREAT; fd = open(special, fl, 0666); if (fd == -1) err(EXIT_FAILURE, "can't open file %s", special); if (fstat(fd, &sb) == -1) err(EXIT_FAILURE, "can't fstat opened %s", special); } else { /* !Fflag */ fd = opendev(special, fl, 0, &special); if (fd == -1 || fstat(fd, &sb) == -1) err(EXIT_FAILURE, "%s: open", special); if (!Nflag) { /* Bail if target special is mounted */ n = getmntinfo(&mp, MNT_NOWAIT); if (n == 0) err(EXIT_FAILURE, "%s: getmntinfo", special); len = sizeof(_PATH_DEV) - 1; s1 = special; if (strncmp(_PATH_DEV, s1, len) == 0) s1 += len; while (--n >= 0) { s2 = mp->f_mntfromname; if (strncmp(_PATH_DEV, s2, len) == 0) { s2 += len - 1; *s2 = 'r'; } if (strcmp(s1, s2) == 0 || strcmp(s1, &s2[1]) == 0) errx(EXIT_FAILURE, "%s is mounted on %s", special, mp->f_mntonname); ++mp; } } pp = getpartition(fd, special, argv, &lp); if (!Iflag) { static const char m[] = "%s partition type is not `%s' (or use -I)"; if (pp->p_fstype != FS_EXT2FS) errx(EXIT_FAILURE, m, special, "ext2fs"); } if (sectorsize == 0) { sectorsize = lp->d_secsize; if (sectorsize <= 0) errx(EXIT_FAILURE, "no default sector size"); } } if (byte_sized) fssize /= sectorsize; if (fssize <= 0) { if (sb.st_size != 0) fssize += sb.st_size / sectorsize; else if (pp) fssize += DL_GETPSIZE(pp); if (fssize <= 0) errx(EXIT_FAILURE, "Unable to determine file system size"); } /* XXXLUKEM: only ftruncate() regular files ? (dsl: or at all?) */ if (Fflag && !Nflag && ftruncate(fd, (off_t)fssize * sectorsize) == -1) err(1, "can't ftruncate %s to %" PRId64, special, fssize); if (Zflag && !Nflag) { /* pre-zero (and de-sparce) the file */ char *buf; int bufsize, i; off_t bufrem; struct statfs sfs; if (fstatfs(fd, &sfs) == -1) { warn("can't fstatvfs `%s'", special); bufsize = 8192; } else bufsize = sfs.f_iosize; if ((buf = calloc(1, bufsize)) == NULL) err(1, "can't allocate buffer of %d", bufsize); bufrem = fssize * sectorsize; if (verbosity > 0) printf("Creating file system image in `%s', " "size %" PRId64 " bytes, in %d byte chunks.\n", special, bufrem, bufsize); while (bufrem > 0) { i = write(fd, buf, MINIMUM(bufsize, bufrem)); if (i == -1) err(1, "writing image"); bufrem -= i; } free(buf); } /* Sort out fragment and block sizes */ if (bsize == 0) { bsize = fsize; if (bsize == 0) { if (fssize < SMALL_FSSIZE) bsize = S_DFL_BSIZE; else if (fssize < MEDIUM_FSSIZE) bsize = M_DFL_BSIZE; else bsize = L_DFL_BSIZE; } } if (fsize == 0) fsize = bsize; blocks = fssize * sectorsize / bsize; if (num_inodes == 0) { if (density != 0) num_inodes = fssize / density; else { if (fssize < SMALL_FSSIZE) num_inodes = S_DFL_NINODE(blocks); else if (fssize < MEDIUM_FSSIZE) num_inodes = M_DFL_NINODE(blocks); else num_inodes = L_DFL_NINODE(blocks); } } mke2fs(special, fd); close(fd); exit(EXIT_SUCCESS); } static int64_t strsuftoi64(const char *desc, const char *arg, int64_t min, int64_t max, int *num_suffix) { int64_t result, r1; int shift = 0; char *ep; errno = 0; r1 = strtoll(arg, &ep, 10); if (ep[0] != '\0' && ep[1] != '\0') errx(EXIT_FAILURE, "%s `%s' is not a valid number.", desc, arg); switch (ep[0]) { case '\0': case 's': case 'S': if (num_suffix != NULL) *num_suffix = 0; break; case 'g': case 'G': shift += 10; /* FALLTHROUGH */ case 'm': case 'M': shift += 10; /* FALLTHROUGH */ case 'k': case 'K': shift += 10; /* FALLTHROUGH */ case 'b': case 'B': if (num_suffix != NULL) *num_suffix = 1; break; default: errx(EXIT_FAILURE, "`%s' is not a valid suffix for %s.", ep, desc); } result = r1 << shift; if (errno == ERANGE || result >> shift != r1) errx(EXIT_FAILURE, "%s `%s' is too large to convert.", desc, arg); if (result < min) errx(EXIT_FAILURE, "%s `%s' (%" PRId64 ") is less than the minimum (%" PRId64 ").", desc, arg, result, min); if (result > max) errx(EXIT_FAILURE, "%s `%s' (%" PRId64 ") is greater than the maximum (%" PRId64 ").", desc, arg, result, max); return result; } static void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [ fsoptions ] special-device\n", __progname); exit(EXIT_FAILURE); } struct disklabel * getdisklabel(const char *s, int fd) { static struct disklabel lab; if (ioctl(fd, DIOCGDINFO, (char *)&lab) == -1) { if (disktype != NULL) { struct disklabel *lp; //unlabeled++; lp = getdiskbyname(disktype); if (lp == NULL) errx(EXIT_FAILURE, "%s: unknown disk type", disktype); return (lp); } warn("ioctl (GDINFO)"); errx(EXIT_FAILURE, "%s: can't read disk label; disk type must be specified", s); } return (&lab); } struct partition * getpartition(int fsi, const char *special, char *argv[], struct disklabel **dl) { struct stat st; const char *cp; struct disklabel *lp; struct partition *pp; if (fstat(fsi, &st) == -1) err(EXIT_FAILURE, "%s", special); if (S_ISBLK(st.st_mode)) errx(EXIT_FAILURE, "%s: block device", special); if (!S_ISCHR(st.st_mode)) warnx("%s: not a character-special device", special); if (*argv[0] == '\0') errx(EXIT_FAILURE, "empty partition name supplied"); cp = argv[0] + strlen(argv[0]) - 1; if ((*cp < 'a' || *cp > ('a' + getmaxpartitions() - 1)) && !isdigit((unsigned char)*cp)) errx(EXIT_FAILURE, "%s: can't figure out file system partition", argv[0]); lp = getdisklabel(special, fsi); if (isdigit((unsigned char)*cp)) pp = &lp->d_partitions[0]; else pp = &lp->d_partitions[*cp - 'a']; if (DL_GETPSIZE(pp) == 0) errx(EXIT_FAILURE, "%s: `%c' partition is unavailable", argv[0], *cp); *dl = lp; return pp; }