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Diffstat (limited to 'ufs-utils/mkfs.c')
| -rw-r--r-- | ufs-utils/mkfs.c | 1406 |
1 files changed, 0 insertions, 1406 deletions
diff --git a/ufs-utils/mkfs.c b/ufs-utils/mkfs.c deleted file mode 100644 index aef3ea92..00000000 --- a/ufs-utils/mkfs.c +++ /dev/null @@ -1,1406 +0,0 @@ -/* - * Copyright (c) 1980, 1989, 1993 - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. 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. - */ - -#ifndef lint -/*static char sccsid[] = "from: @(#)mkfs.c 8.3 (Berkeley) 2/3/94";*/ -static char *rcsid = "$Id: mkfs.c,v 1.22 2006/03/14 23:27:50 tschwinge Exp $"; -#endif /* not lint */ - -#include <unistd.h> -#include <stddef.h> -#include <stdlib.h> -#include <argp.h> -#include <assert.h> -#include <error.h> -#include <string.h> -#include <sys/param.h> -#include <sys/time.h> -#include <sys/wait.h> -#include <sys/resource.h> -#include "../ufs/dinode.h" -#include "../ufs/dir.h" -#include "../ufs/fs.h" -/* #include <sys/disklabel.h> */ -#include <sys/stat.h> -#include <fcntl.h> -#include <dirent.h> -#include <version.h> - -#include <device/device_types.h> -#include <device/disk_status.h> - -#include <hurd.h> - -/* Begin misc additions for GNU Hurd */ - -/* For GNU Hurd: the ufs DIRSIZ macro is different than the BSD - 4.4 version that mkfs expects. So we provide here the BSD version. */ -#undef DIRSIZ -#if (BYTE_ORDER == LITTLE_ENDIAN) -#define DIRSIZ(oldfmt, dp) \ - ((oldfmt) ? \ - ((sizeof (struct directory_entry) - (MAXNAMLEN+1)) + (((dp)->d_type+1 + 3) &~ 3)) : \ - ((sizeof (struct directory_entry) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))) -#else -#define DIRSIZ(oldfmt, dp) \ - ((sizeof (struct directory_entry) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3)) -#endif - -#define MAXPHYS (64 * 1024) - -/* Provide mode from struct dinode * */ -#define DI_MODE(dp) (((dp)->di_modeh << 16) | (dp)->di_model) - -#define DEV_BSIZE 512 - -#define btodb(bytes) ((bytes) / DEV_BSIZE) - -/* End additions for GNU Hurd */ - -#ifndef STANDALONE -#include <a.out.h> -#include <stdio.h> -#include <time.h> -#endif - -/* - * make file system for cylinder-group style file systems - */ - -extern error_t fd_get_disklabel (int fd, struct disklabel *lab); -static void mkfs (), initcg (), fsinit (), setblock (); -static void iput (), rdfs (), clrblock (), wtfs (); -static int makedir (), isblock (); - -/* - * We limit the size of the inode map to be no more than a - * third of the cylinder group space, since we must leave at - * least an equal amount of space for the block map. - * - * N.B.: MAXIPG must be a multiple of INOPB(fs). - */ -#define MAXIPG(fs) roundup((fs)->fs_bsize * NBBY / 3, INOPB(fs)) - -#define UMASK 0755 -#define MAXINOPB (MAXBSIZE / sizeof(struct dinode)) -#define POWEROF2(num) (((num) & ((num) - 1)) == 0) - -/* - * variables set up by front end. - */ -#define extern -extern int Nflag; /* run mkfs without writing file system */ -extern int Oflag; /* format as an 4.3BSD file system */ -extern int fssize; /* file system size */ -extern int ntracks; /* # tracks/cylinder */ -extern int nsectors; /* # sectors/track */ -extern int nphyssectors; /* # sectors/track including spares */ -extern int secpercyl; /* sectors per cylinder */ -extern int sectorsize; /* bytes/sector */ -extern int rpm; /* revolutions/minute of drive */ -extern int interleave; /* hardware sector interleave */ -extern int trackskew; /* sector 0 skew, per track */ -extern int headswitch; /* head switch time, usec */ -extern int trackseek; /* track-to-track seek, usec */ -extern int fsize; /* fragment size */ -extern int bsize; /* block size */ -extern int cpg; /* cylinders/cylinder group */ -extern int cpgflg; /* cylinders/cylinder group flag was given */ -extern int minfree; /* free space threshold */ -extern int opt; /* optimization preference (space or time) */ -extern int density; /* number of bytes per inode */ -extern int maxcontig; /* max contiguous blocks to allocate */ -extern int rotdelay; /* rotational delay between blocks */ -extern int maxbpg; /* maximum blocks per file in a cyl group */ -extern int nrpos; /* # of distinguished rotational positions */ -extern int bbsize; /* boot block size */ -extern int sbsize; /* superblock size */ -#undef extern - -union { - struct fs fs; - char pad[SBSIZE]; -} fsun; -#define sblock fsun.fs -struct csum *fscs; - -union { - struct cg cg; - char pad[MAXBSIZE]; -} cgun; -#define acg cgun.cg - -struct dinode zino[MAXBSIZE / sizeof(struct dinode)]; - -int fsi, fso; -daddr_t alloc(); - -const char *argp_program_version = STANDARD_HURD_VERSION (mkfs.ufs); - -#define _STRINGIFY(arg) #arg -#define STRINGIFY(arg) _STRINGIFY (arg) - -static const struct argp_option options[] = { - {0,0,0,0,0, 1}, - {"just-print", 'N', 0, 0, - "Just print the file system parameters that would be used"}, - {"old-format", 'O', 0, 0, "Create a 4.3BSD format filesystem"}, - {"max-contig", 'a', "BLOCKS", 0, - "The maximum number of contiguous blocks that will be laid out before" - " forcing a rotational delay; the default is no limit"}, - {"block-size", 'b', "BYTES", 0, "The block size of the file system"}, - {"group-cylinders", 'c', "N", 0, - "The number of cylinders per cylinder group; the default 16"}, - {"rot-delay", 'd', "MSEC", 0, - "The expected time to service a transfer completion interrupt and" - " initiate a new transfer on the same disk; the default is 0"}, - {"max-bpg", 'e', "BLOCKS", 0, - "Maximum number of blocks any single file can allocate out of a cylinder" - " group before it is forced to begin allocating blocks from another" - " cylinder group; the default is about one quarter of the total blocks" - " in a cylinder group"}, - {"frag-size", 'f', "BYTES", 0, "The fragment size"}, - {"inode-density", 'i', "BYTES", 0, - "The density of inodes in the file system, in bytes of data space per" - " inode; the default is one inode per 4 filesystem frags"}, - {"minfree", 'm', "PERCENT", 0, - "The percentage of space reserved from normal users; the default is " - STRINGIFY (MINFREE) "%"}, - {"rot-positions", 'n', "N", 0, - "The number of distinct rotational positions; the default is 8"}, - {"optimization", 'o', "METH", 0, "``space'' or ``time''"}, - {"size", 's', "SECTORS", 0, "The size of the file system"}, - - {0,0,0,0, - "The following options override the standard sizes for the disk" - " geometry; their default values are taken from the disk label:", 2}, - - {"sector-size", 'S', "BYTES", 0, "The size of a sector (usually 512)"}, - {"skew", 'k', "SECTORS", 0, "Sector 0 skew, per track"}, - {"interleave", 'l', "LOG-PHYS-RATIO", 0, "Hardware sector interleave"}, - {"rpm", 'r', "RPM", 0, "The speed of the disk in revolutions per minute"}, - {"tracks", 't', "N", 0, "The number of tracks/cylinder"}, - {"sectors", 'u', "N", 0, - "The number of sectors per track (does not include sectors reserved for" - " bad block replacement"}, - {"spare-sectors", 'p', "N", 0, - "Spare sectors (for bad sector replacement) at the end of each track"}, - {"cyl-spare-sectors", 'x', "N", 0, - "Spare sectors (for bad sector replacement) at the end of the last track" - " in each cylinder"}, - {0, 0} -}; -static char *args_doc = "DEVICE"; -static char *doc = "Write a ufs filesystem image onto DEVICE."; - -struct amark { void *addr; struct amark *next; }; - -static void -amarks_add (struct amark **amarks, void *addr) - { - struct amark *up = malloc (sizeof (struct amark)); - assert (up != 0); - up->addr = addr; - up->next = *amarks; - *amarks = up; - } -static int -amarks_contains (struct amark *amarks, void *addr) - { - while (amarks) - if (amarks->addr == addr) - return 1; - else - amarks = amarks->next; - return 0; - } - -static const struct disklabel default_disklabel = { - d_rpm: 3600, - d_interleave: 1, - d_secsize: DEV_BSIZE, - d_sparespertrack: 0, - d_sparespercyl: 0, - d_trackskew: 0, - d_cylskew: 0, - d_headswitch: 0, - d_trkseek: 0, -}; - -char *device = 0; - -#define deverr(code, err, fmt, args...) \ - error (code, err, "%s: " fmt, device , ##args) - -int -main (int argc, char **argv) -{ - int fdo, fdi; - struct amark *uparams = 0; - error_t label_err = 0; - struct disklabel label_buf, *label = 0; - int nspares = 0, ncspares = 0; - - /* Parse our options... */ - error_t parse_opt (int key, char *arg, struct argp_state *state) - { - switch (key) - { - case 'N': Nflag = 1; break; - case 'O': Oflag = 1; break; - -/* Mark &VAR as being a uparam, and set VAR. */ -#define UP_INT(var) { amarks_add (&uparams, &var); var = atoi (arg); } - - case 'a': UP_INT (maxcontig); break; - case 'b': UP_INT (bsize); break; - case 'c': UP_INT (cpg); cpgflg = 1; break; - case 'd': UP_INT (rotdelay); break; - case 'e': UP_INT (maxbpg); break; - case 'f': UP_INT (fsize); break; - case 'i': UP_INT (density); break; - case 'm': UP_INT (minfree); break; - case 'n': UP_INT (nrpos); break; - case 's': UP_INT (fssize); break; - case 'S': UP_INT (sectorsize); break; - case 'k': UP_INT (trackskew); break; - case 'l': UP_INT (interleave); break; - case 'r': UP_INT (rpm); break; - case 't': UP_INT (ntracks); break; - case 'u': UP_INT (nsectors); break; - case 'p': UP_INT (nspares); break; - case 'x': UP_INT (ncspares); break; - - case 'o': - amarks_add (&uparams, &opt); - if (strcmp (arg, "time") == 0) - opt = FS_OPTTIME; - else if (strcmp (arg, "space") == 0) - opt = FS_OPTSPACE; - else - argp_error (state, "%s: Invalid value for --optimization", arg); - break; - - case ARGP_KEY_ARG: - if (state->arg_num > 0) - return ARGP_ERR_UNKNOWN; - device = arg; - break; - - default: - return ARGP_ERR_UNKNOWN; - } - return 0; - } - const struct argp argp = { options, parse_opt, args_doc, doc }; - - /* Tries to get the disklabel for DEVICE; if it can't, then if PARAM_NAME - is 0, returns 0, otherwise an error is printed (using PARAM_NAME) and - the program exits. */ - struct disklabel *dl (char *param_name) - { - if (! label) - { - if (! label_err) - { - label_err = fd_get_disklabel (fdi, &label_buf); - if (! label_err) - label = &label_buf; - } - if (label_err && param_name) - error (9, label_err, - "%s: Can't get disklabel; please specify --%s", - device, param_name); - } - return label; - } - /* Tries to get the integer field at offset OFFS from the disklabel for - DEVICE; if it can't, then if PARAM_NAME is 0, returns the corresponding - value from DEFAULT_DISKLABEL, otherwise an error is printed and the - program exits. */ - int dl_int (char *param_name, size_t offs) - { - struct disklabel *l = dl (param_name); - return *(int *)((char *)(l ?: &default_disklabel) + offs); - } - /* A version of dl_int that takes the field name instead of an offset. */ -#define DL_INT(param_name, field) \ - dl_int (param_name, offsetof (struct disklabel, field)) - - /* Like dl_int, but adjust for any difference in sector size between the - disklabel and SECTORSIZE. */ - int dl_secs (char *param_name, size_t offs) - { - int val = dl_int (param_name, offs); - int dl_ss = DL_INT (0, d_secsize); - if (sectorsize < dl_ss) - deverr (10, 0, - "%d: Sector size is less than device sector size (%d)", - sectorsize, dl_ss); - else if (sectorsize > dl_ss) - if (sectorsize % dl_ss != 0) - deverr (11, 0, - "%d: Sector size not a multiple of device sector size (%d)", - sectorsize, dl_ss); - else - val /= sectorsize / dl_ss; - return val; - } - /* A version of dl_secs that takes the field name instead of an offset. */ -#define DL_SECS(param_name, field) \ - dl_secs (param_name, offsetof (struct disklabel, field)) - - /* Parse our arguments. */ - argp_parse (&argp, argc, argv, 0, 0, 0); - - fdi = open (device, O_RDONLY); - if (fdi == -1) - error (2, errno, "%s", device); - fdo = open (device, O_WRONLY); - if (fdo == -1) - error (3, errno, "%s", device); - - /* If VAR hasn't been set by the user, set it to DEF_VAL. */ -#define DEFAULT(var, def_val) \ - (amarks_contains (uparams, &var) ? 0 : (((var) = (def_val)), 0)) - - DEFAULT (sectorsize, DEV_BSIZE); - DEFAULT (fssize, - ({ struct stat st; - if (fstat (fdi, &st) == -1) - deverr (4, errno, "Cannot get size"); - st.st_size / sectorsize; })); - DEFAULT (ntracks, DL_INT ("tracks", d_ntracks)); - DEFAULT (nsectors, DL_SECS ("sectors", d_nsectors)); - DEFAULT (nspares, DL_SECS (0, d_sparespertrack)); - DEFAULT (ncspares, DL_SECS (0, d_sparespercyl)); - - if (nspares >= nsectors) - deverr (5, 0, "%d: Too many spare sectors per track", nspares); - if (ncspares >= nsectors) - deverr (5, 0, "%d: Too many spare sectors per cylinder", ncspares); - nphyssectors = nsectors + nspares; - - secpercyl = nsectors * ntracks; - - DEFAULT (rpm, DL_INT (0, d_rpm)); - DEFAULT (interleave, DL_INT (0, d_interleave)); - DEFAULT (trackskew, DL_SECS (0, d_trackskew)); - DEFAULT (headswitch, DL_INT (0, d_headswitch)); - DEFAULT (trackseek, DL_INT (0, d_trkseek)); - - DEFAULT (fsize, 1024); - DEFAULT (bsize, 8192); - - DEFAULT (cpg, 16); - DEFAULT (minfree, MINFREE); - DEFAULT (opt, DEFAULTOPT); - DEFAULT (density, 4 * fsize); -/* maxcontig = MAX (1, MIN (MAXPHYS, MAXBSIZE) / bsize - 1); */ - DEFAULT (maxcontig, 0); - DEFAULT (rotdelay, 4); -#define MAXBLKPG(bsize) ((bsize) / sizeof(daddr_t)) - DEFAULT (maxbpg, MAXBLKPG (bsize)); - DEFAULT (nrpos, 8); - - bbsize = BBSIZE; - sbsize = SBSIZE; - - mkfs (0, device, fdi, fdo); - - return 0; -} - -void -mkfs(pp, fsys, fi, fo) - struct partition *pp; - char *fsys; - int fi, fo; -{ - register long i, mincpc, mincpg, inospercg; - long cylno, rpos, blk, j, warn = 0; - long used, mincpgcnt, bpcg; - long mapcramped, inodecramped; - long postblsize, rotblsize, totalsbsize; - time_t utime; - quad_t sizepb; - -#ifndef STANDALONE - time(&utime); -#endif - fsi = fi; - fso = fo; - if (Oflag) { - sblock.fs_inodefmt = FS_42INODEFMT; - sblock.fs_maxsymlinklen = 0; - } else { - sblock.fs_inodefmt = FS_44INODEFMT; - sblock.fs_maxsymlinklen = MAXSYMLINKLEN; - } - /* - * Validate the given file system size. - * Verify that its last block can actually be accessed. - */ - if (fssize <= 0) - deverr (13, 0, "preposterous size %d", fssize); - wtfs(fssize - 1, sectorsize, (char *)&sblock); - /* - * collect and verify the sector and track info - */ - sblock.fs_nsect = nsectors; - sblock.fs_ntrak = ntracks; - if (sblock.fs_ntrak <= 0) - deverr (14, 0, "preposterous ntrak %ld", sblock.fs_ntrak); - if (sblock.fs_nsect <= 0) - deverr (15, 0, "preposterous nsect %ld", sblock.fs_nsect); - /* - * collect and verify the block and fragment sizes - */ - sblock.fs_bsize = bsize; - sblock.fs_fsize = fsize; - if (!POWEROF2(sblock.fs_bsize)) - deverr (16, 0, - "block size must be a power of 2, not %ld", - sblock.fs_bsize); - if (!POWEROF2(sblock.fs_fsize)) - deverr (17, 0, - "fragment size must be a power of 2, not %ld", - sblock.fs_fsize); - if (sblock.fs_fsize < sectorsize) - deverr (18, 0, - "fragment size %ld is too small, minimum is %d", - sblock.fs_fsize, sectorsize); - if (sblock.fs_bsize < MINBSIZE) - deverr (19, 0, - "block size %ld is too small, minimum is %d", - sblock.fs_bsize, MINBSIZE); - if (sblock.fs_bsize < sblock.fs_fsize) - deverr (20, 0, - "block size (%ld) cannot be smaller than fragment size (%ld)", - sblock.fs_bsize, sblock.fs_fsize); - sblock.fs_bmask = ~(sblock.fs_bsize - 1); - sblock.fs_fmask = ~(sblock.fs_fsize - 1); - sblock.fs_qbmask = ~sblock.fs_bmask; - sblock.fs_qfmask = ~sblock.fs_fmask; - for (sblock.fs_bshift = 0, i = sblock.fs_bsize; i > 1; i >>= 1) - sblock.fs_bshift++; - for (sblock.fs_fshift = 0, i = sblock.fs_fsize; i > 1; i >>= 1) - sblock.fs_fshift++; - sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); - for (sblock.fs_fragshift = 0, i = sblock.fs_frag; i > 1; i >>= 1) - sblock.fs_fragshift++; - if (sblock.fs_frag > MAXFRAG) - deverr (21, 0, - "fragment size %ld is too small, minimum with block size %ld is %ld", - sblock.fs_fsize, sblock.fs_bsize, - sblock.fs_bsize / MAXFRAG); - sblock.fs_nrpos = nrpos; - sblock.fs_nindir = sblock.fs_bsize / sizeof(daddr_t); - sblock.fs_inopb = sblock.fs_bsize / sizeof(struct dinode); - sblock.fs_nspf = sblock.fs_fsize / sectorsize; - for (sblock.fs_fsbtodb = 0, i = NSPF(&sblock); i > 1; i >>= 1) - sblock.fs_fsbtodb++; - sblock.fs_sblkno = - roundup(howmany(bbsize + sbsize, sblock.fs_fsize), sblock.fs_frag); - sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno + - roundup(howmany(sbsize, sblock.fs_fsize), sblock.fs_frag)); - sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; - sblock.fs_cgoffset = roundup( - howmany(sblock.fs_nsect, NSPF(&sblock)), sblock.fs_frag); - for (sblock.fs_cgmask = 0xffffffff, i = sblock.fs_ntrak; i > 1; i >>= 1) - sblock.fs_cgmask <<= 1; - if (!POWEROF2(sblock.fs_ntrak)) - sblock.fs_cgmask <<= 1; - sblock.fs_maxfilesize = sblock.fs_bsize * NDADDR - 1; - for (sizepb = sblock.fs_bsize, i = 0; i < NIADDR; i++) { - sizepb *= NINDIR(&sblock); - sblock.fs_maxfilesize += sizepb; - } - /* - * Validate specified/determined secpercyl - * and calculate minimum cylinders per group. - */ - sblock.fs_spc = secpercyl; - for (sblock.fs_cpc = NSPB(&sblock), i = sblock.fs_spc; - sblock.fs_cpc > 1 && (i & 1) == 0; - sblock.fs_cpc >>= 1, i >>= 1) - /* void */; - mincpc = sblock.fs_cpc; - bpcg = sblock.fs_spc * sectorsize; - inospercg = roundup(bpcg / sizeof(struct dinode), INOPB(&sblock)); - if (inospercg > MAXIPG(&sblock)) - inospercg = MAXIPG(&sblock); - used = (sblock.fs_iblkno + inospercg / INOPF(&sblock)) * NSPF(&sblock); - mincpgcnt = howmany(sblock.fs_cgoffset * (~sblock.fs_cgmask) + used, - sblock.fs_spc); - mincpg = roundup(mincpgcnt, mincpc); - /* - * Ensure that cylinder group with mincpg has enough space - * for block maps. - */ - sblock.fs_cpg = mincpg; - sblock.fs_ipg = inospercg; - if (maxcontig > 1) - sblock.fs_contigsumsize = MIN(maxcontig, FS_MAXCONTIG); - mapcramped = 0; - while (CGSIZE(&sblock) > sblock.fs_bsize) { - mapcramped = 1; - if (sblock.fs_bsize < MAXBSIZE) { - sblock.fs_bsize <<= 1; - if ((i & 1) == 0) { - i >>= 1; - } else { - sblock.fs_cpc <<= 1; - mincpc <<= 1; - mincpg = roundup(mincpgcnt, mincpc); - sblock.fs_cpg = mincpg; - } - sblock.fs_frag <<= 1; - sblock.fs_fragshift += 1; - if (sblock.fs_frag <= MAXFRAG) - continue; - } - if (sblock.fs_fsize == sblock.fs_bsize) - deverr (22, 0, - "There is no block size that can support this disk"); - sblock.fs_frag >>= 1; - sblock.fs_fragshift -= 1; - sblock.fs_fsize <<= 1; - sblock.fs_nspf <<= 1; - } - /* - * Ensure that cylinder group with mincpg has enough space for inodes. - */ - inodecramped = 0; - used *= sectorsize; - inospercg = roundup((mincpg * bpcg - used) / density, INOPB(&sblock)); - sblock.fs_ipg = inospercg; - while (inospercg > MAXIPG(&sblock)) { - inodecramped = 1; - if (mincpc == 1 || sblock.fs_frag == 1 || - sblock.fs_bsize == MINBSIZE) - break; - deverr (0, 0, - "With a block size of %ld %s %ld", sblock.fs_bsize, - "minimum bytes per inode is", - (mincpg * bpcg - used) / MAXIPG(&sblock) + 1); - sblock.fs_bsize >>= 1; - sblock.fs_frag >>= 1; - sblock.fs_fragshift -= 1; - mincpc >>= 1; - sblock.fs_cpg = roundup(mincpgcnt, mincpc); - if (CGSIZE(&sblock) > sblock.fs_bsize) { - sblock.fs_bsize <<= 1; - break; - } - mincpg = sblock.fs_cpg; - inospercg = - roundup((mincpg * bpcg - used) / density, INOPB(&sblock)); - sblock.fs_ipg = inospercg; - } - if (inodecramped) { - if (inospercg > MAXIPG(&sblock)) - deverr (0, 0, "Minimum bytes per inode is %ld", - (mincpg * bpcg - used) / MAXIPG(&sblock) + 1); - else if (!mapcramped) - deverr (0, 0, - "With %d bytes per inode," - " minimum cylinders per group is %ld", - density, mincpg); - } - if (mapcramped) - deverr (0, 0, - "With %ld sectors per cylinder," - " minimum cylinders per group is %ld", - sblock.fs_spc, mincpg); - if (inodecramped || mapcramped) - if (sblock.fs_bsize != bsize) - { - deverr (0, 0, - "This requires the block size to be changed from %d to %ld", - bsize, sblock.fs_bsize); - deverr (23, 0, - "and the fragment size to be changed from %d to %ld", - fsize, sblock.fs_fsize); - } - else - exit(23); - /* - * Calculate the number of cylinders per group - */ - sblock.fs_cpg = cpg; - if (sblock.fs_cpg % mincpc != 0) { - deverr (0, 0, - "%s groups must have a multiple of %ld cylinders", - cpgflg ? "Cylinder" : "Warning: cylinder", mincpc); - sblock.fs_cpg = roundup(sblock.fs_cpg, mincpc); - if (!cpgflg) - cpg = sblock.fs_cpg; - } - /* - * Must ensure there is enough space for inodes. - */ - sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, - INOPB(&sblock)); - while (sblock.fs_ipg > MAXIPG(&sblock)) { - inodecramped = 1; - sblock.fs_cpg -= mincpc; - sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, - INOPB(&sblock)); - } - /* - * Must ensure there is enough space to hold block map. - */ - while (CGSIZE(&sblock) > sblock.fs_bsize) { - mapcramped = 1; - sblock.fs_cpg -= mincpc; - sblock.fs_ipg = roundup((sblock.fs_cpg * bpcg - used) / density, - INOPB(&sblock)); - } - sblock.fs_fpg = (sblock.fs_cpg * sblock.fs_spc) / NSPF(&sblock); - if ((sblock.fs_cpg * sblock.fs_spc) % NSPB(&sblock) != 0) - deverr (24, 0, "panic (fs_cpg * fs_spc) %% NSPF != 0"); - if (sblock.fs_cpg < mincpg) - deverr (25, 0, - "cylinder groups must have at least %ld cylinders", mincpg); - else if (sblock.fs_cpg != cpg) - { - if (cpgflg && !mapcramped && !inodecramped) - exit(26); - deverr (0, 0, - "%s%s cylinders per group to %ld", - (cpgflg ? "" : "Warning: "), - ((mapcramped && inodecramped) - ? "Block size and bytes per inode restrict" - : mapcramped ? "Block size restricts" - : "Bytes per inode restrict"), - sblock.fs_cpg); - if (cpgflg) - exit(27); - } - sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); - /* - * Now have size for file system and nsect and ntrak. - * Determine number of cylinders and blocks in the file system. - */ - sblock.fs_size = fssize = dbtofsb(&sblock, fssize); - sblock.fs_ncyl = fssize * NSPF(&sblock) / sblock.fs_spc; - if (fssize * NSPF(&sblock) > sblock.fs_ncyl * sblock.fs_spc) { - sblock.fs_ncyl++; - warn = 1; - } - if (sblock.fs_ncyl < 1) - deverr (28, 0, "file systems must have at least one cylinder"); - /* - * Determine feasability/values of rotational layout tables. - * - * The size of the rotational layout tables is limited by the - * size of the superblock, SBSIZE. The amount of space available - * for tables is calculated as (SBSIZE - sizeof (struct fs)). - * The size of these tables is inversely proportional to the block - * size of the file system. The size increases if sectors per track - * are not powers of two, because more cylinders must be described - * by the tables before the rotational pattern repeats (fs_cpc). - */ - sblock.fs_interleave = interleave; - sblock.fs_trackskew = trackskew; - sblock.fs_npsect = nphyssectors; - sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; - sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); - if (sblock.fs_ntrak == 1) { - sblock.fs_cpc = 0; - goto next; - } - postblsize = sblock.fs_nrpos * sblock.fs_cpc * sizeof(short); - rotblsize = sblock.fs_cpc * sblock.fs_spc / NSPB(&sblock); - totalsbsize = sizeof(struct fs) + rotblsize; - if (sblock.fs_nrpos == 8 && sblock.fs_cpc <= 16) { - /* use old static table space */ - sblock.fs_postbloff = (char *)(&sblock.fs_opostbl[0][0]) - - (char *)(&sblock.fs_link); - sblock.fs_rotbloff = &sblock.fs_space[0] - - (u_char *)(&sblock.fs_link); - } else { - /* use dynamic table space */ - sblock.fs_postbloff = &sblock.fs_space[0] - - (u_char *)(&sblock.fs_link); - sblock.fs_rotbloff = sblock.fs_postbloff + postblsize; - totalsbsize += postblsize; - } - if (totalsbsize > SBSIZE || - sblock.fs_nsect > (1 << NBBY) * NSPB(&sblock)) - { - deverr (0, 0, - "Warning: insufficient space in super block for " - "rotational layout tables with nsect %ld and ntrak %ld", - sblock.fs_nsect, sblock.fs_ntrak); - deverr (0, 0, "File system performance may be impaired"); - sblock.fs_cpc = 0; - goto next; - } - sblock.fs_sbsize = fragroundup(&sblock, totalsbsize); - /* - * calculate the available blocks for each rotational position - */ - for (cylno = 0; cylno < sblock.fs_cpc; cylno++) - for (rpos = 0; rpos < sblock.fs_nrpos; rpos++) - fs_postbl(&sblock, cylno)[rpos] = -1; - for (i = (rotblsize - 1) * sblock.fs_frag; - i >= 0; i -= sblock.fs_frag) { - cylno = cbtocylno(&sblock, i); - rpos = cbtorpos(&sblock, i); - blk = fragstoblks(&sblock, i); - if (fs_postbl(&sblock, cylno)[rpos] == -1) - fs_rotbl(&sblock)[blk] = 0; - else - fs_rotbl(&sblock)[blk] = - fs_postbl(&sblock, cylno)[rpos] - blk; - fs_postbl(&sblock, cylno)[rpos] = blk; - } -next: - /* - * Compute/validate number of cylinder groups. - */ - sblock.fs_ncg = sblock.fs_ncyl / sblock.fs_cpg; - if (sblock.fs_ncyl % sblock.fs_cpg) - sblock.fs_ncg++; - sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); - i = MIN(~sblock.fs_cgmask, sblock.fs_ncg - 1); - if (cgdmin(&sblock, i) - cgbase(&sblock, i) >= sblock.fs_fpg) - { - deverr (0, 0, - "Inode blocks/cyl group (%ld) >= data blocks (%ld)", - cgdmin(&sblock, i) - cgbase(&sblock, i) / sblock.fs_frag, - sblock.fs_fpg / sblock.fs_frag); - deverr (29, 0, - "number of cylinders per cylinder group (%ld)" - " must be increased", sblock.fs_cpg); - } - j = sblock.fs_ncg - 1; - if ((i = fssize - j * sblock.fs_fpg) < sblock.fs_fpg && - cgdmin(&sblock, j) - cgbase(&sblock, j) > i) { - if (j == 0) - deverr (30, 0, - "Filesystem must have at least %ld sectors", - NSPF(&sblock) - * (cgdmin(&sblock, 0) + 3 * sblock.fs_frag)); - deverr (0, 0, - "Warning: inode blocks/cyl group (%ld) >=" - " data blocks (%ld) in last cylinder group.", - ((cgdmin(&sblock, j) - cgbase(&sblock, j)) - / sblock.fs_frag), - i / sblock.fs_frag); - deverr (0, 0, - "This implies %ld sector(s) cannot be allocated", - i * NSPF(&sblock)); - sblock.fs_ncg--; - sblock.fs_ncyl -= sblock.fs_ncyl % sblock.fs_cpg; - sblock.fs_size = fssize = sblock.fs_ncyl * sblock.fs_spc / - NSPF(&sblock); - warn = 0; - } - if (warn) - deverr (0, 0, - "Warning: %ld sector(s) in last cylinder unallocated", - sblock.fs_spc - - (fssize * NSPF(&sblock) - (sblock.fs_ncyl - 1) - * sblock.fs_spc)); - /* - * fill in remaining fields of the super block - */ - sblock.fs_csaddr = cgdmin(&sblock, 0); - sblock.fs_cssize = - fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); - i = sblock.fs_bsize / sizeof(struct csum); - sblock.fs_csmask = ~(i - 1); - for (sblock.fs_csshift = 0; i > 1; i >>= 1) - sblock.fs_csshift++; - fscs = (struct csum *)calloc(1, sblock.fs_cssize); - sblock.fs_magic = FS_MAGIC; - sblock.fs_rotdelay = rotdelay; - sblock.fs_minfree = minfree; - sblock.fs_maxcontig = maxcontig; - sblock.fs_headswitch = headswitch; - sblock.fs_trkseek = trackseek; - sblock.fs_maxbpg = maxbpg; - sblock.fs_rps = rpm / 60; - sblock.fs_optim = opt; - sblock.fs_cgrotor = 0; - sblock.fs_cstotal.cs_ndir = 0; - sblock.fs_cstotal.cs_nbfree = 0; - sblock.fs_cstotal.cs_nifree = 0; - sblock.fs_cstotal.cs_nffree = 0; - sblock.fs_fmod = 0; - sblock.fs_ronly = 0; - sblock.fs_clean = 1; - - /* - * Dump out summary information about file system. - */ - printf("%s:\n\t%ld sectors in %ld %s of %ld tracks, %ld sectors\n", - fsys, sblock.fs_size * NSPF(&sblock), sblock.fs_ncyl, - "cylinders", sblock.fs_ntrak, sblock.fs_nsect); -#define B2MBFACTOR (1 / (1024.0 * 1024.0)) - printf("\t%.1fMB in %ld cyl groups (%ld c/g, %.2fMB/g, %ld i/g)\n", - (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, - sblock.fs_ncg, sblock.fs_cpg, - (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, - sblock.fs_ipg); -#undef B2MBFACTOR - - /* - * Now build the cylinders group blocks and - * then print out indices of cylinder groups. - */ - printf("\tsuperblock backups at:"); - for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { - initcg(cylno, utime); - if (cylno % 8 == 0) - printf("\n\t"); - printf(" %ld,", fsbtodb(&sblock, cgsblock(&sblock, cylno))); - } - printf("\n"); - if (Nflag) - exit(0); - /* - * Now construct the initial file system, - * then write out the super-block. - */ - fsinit(utime); - sblock.fs_time = utime; - wtfs((int)SBOFF / sectorsize, sbsize, (char *)&sblock); - for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) - wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), - sblock.fs_cssize - i < sblock.fs_bsize ? - sblock.fs_cssize - i : sblock.fs_bsize, - ((char *)fscs) + i); - /* - * Write out the duplicate super blocks - */ - for (cylno = 0; cylno < sblock.fs_ncg; cylno++) - wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), - sbsize, (char *)&sblock); -#if 0 /* Not in Hurd (yet) */ - /* - * Update information about this partion in pack - * label, to that it may be updated on disk. - */ - pp->p_fstype = FS_BSDFFS; - pp->p_fsize = sblock.fs_fsize; - pp->p_frag = sblock.fs_frag; - pp->p_cpg = sblock.fs_cpg; -#endif -} - -/* - * Initialize a cylinder group. - */ -void -initcg(cylno, utime) - int cylno; - time_t utime; -{ - long i; - daddr_t cbase, d, dlower, dupper, dmax, blkno; - register struct csum *cs; - - /* - * Determine block bounds for cylinder group. - * Allow space for super block summary information in first - * cylinder group. - */ - cbase = cgbase(&sblock, cylno); - dmax = cbase + sblock.fs_fpg; - if (dmax > sblock.fs_size) - dmax = sblock.fs_size; - dlower = cgsblock(&sblock, cylno) - cbase; - dupper = cgdmin(&sblock, cylno) - cbase; - if (cylno == 0) - dupper += howmany(sblock.fs_cssize, sblock.fs_fsize); - cs = fscs + cylno; - bzero(&acg, sblock.fs_cgsize); - acg.cg_time = utime; - acg.cg_magic = CG_MAGIC; - acg.cg_cgx = cylno; - if (cylno == sblock.fs_ncg - 1) - acg.cg_ncyl = sblock.fs_ncyl % sblock.fs_cpg; - else - acg.cg_ncyl = sblock.fs_cpg; - acg.cg_niblk = sblock.fs_ipg; - acg.cg_ndblk = dmax - cbase; - if (sblock.fs_contigsumsize > 0) - acg.cg_nclusterblks = acg.cg_ndblk / sblock.fs_frag; - acg.cg_btotoff = &acg.cg_space[0] - (u_char *)(&acg.cg_link); - acg.cg_boff = acg.cg_btotoff + sblock.fs_cpg * sizeof(long); - acg.cg_iusedoff = acg.cg_boff + - sblock.fs_cpg * sblock.fs_nrpos * sizeof(short); - acg.cg_freeoff = acg.cg_iusedoff + howmany(sblock.fs_ipg, NBBY); - if (sblock.fs_contigsumsize <= 0) { - acg.cg_nextfreeoff = acg.cg_freeoff + - howmany(sblock.fs_cpg * sblock.fs_spc / NSPF(&sblock), NBBY); - } else { - acg.cg_clustersumoff = acg.cg_freeoff + howmany - (sblock.fs_cpg * sblock.fs_spc / NSPF(&sblock), NBBY) - - sizeof(long); - acg.cg_clustersumoff = - roundup(acg.cg_clustersumoff, sizeof(long)); - acg.cg_clusteroff = acg.cg_clustersumoff + - (sblock.fs_contigsumsize + 1) * sizeof(long); - acg.cg_nextfreeoff = acg.cg_clusteroff + howmany - (sblock.fs_cpg * sblock.fs_spc / NSPB(&sblock), NBBY); - } - if (acg.cg_nextfreeoff - (long)(&acg.cg_link) > sblock.fs_cgsize) - deverr (37, 0, "Panic: cylinder group too big"); - acg.cg_cs.cs_nifree += sblock.fs_ipg; - if (cylno == 0) - for (i = 0; i < ROOTINO; i++) { - setbit(cg_inosused(&acg), i); - acg.cg_cs.cs_nifree--; - } - for (i = 0; i < sblock.fs_ipg / INOPF(&sblock); i += sblock.fs_frag) - wtfs(fsbtodb(&sblock, cgimin(&sblock, cylno) + i), - sblock.fs_bsize, (char *)zino); - if (cylno > 0) { - /* - * In cylno 0, beginning space is reserved - * for boot and super blocks. - */ - for (d = 0; d < dlower; d += sblock.fs_frag) { - blkno = d / sblock.fs_frag; - setblock(&sblock, cg_blksfree(&acg), blkno); - if (sblock.fs_contigsumsize > 0) - setbit(cg_clustersfree(&acg), blkno); - acg.cg_cs.cs_nbfree++; - cg_blktot(&acg)[cbtocylno(&sblock, d)]++; - cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) - [cbtorpos(&sblock, d)]++; - } - sblock.fs_dsize += dlower; - } - sblock.fs_dsize += acg.cg_ndblk - dupper; - i = dupper % sblock.fs_frag; - if (i) { - acg.cg_frsum[sblock.fs_frag - i]++; - for (d = dupper + sblock.fs_frag - i; dupper < d; dupper++) { - setbit(cg_blksfree(&acg), dupper); - acg.cg_cs.cs_nffree++; - } - } - for (d = dupper; d + sblock.fs_frag <= dmax - cbase; ) { - blkno = d / sblock.fs_frag; - setblock(&sblock, cg_blksfree(&acg), blkno); - if (sblock.fs_contigsumsize > 0) - setbit(cg_clustersfree(&acg), blkno); - acg.cg_cs.cs_nbfree++; - cg_blktot(&acg)[cbtocylno(&sblock, d)]++; - cg_blks(&sblock, &acg, cbtocylno(&sblock, d)) - [cbtorpos(&sblock, d)]++; - d += sblock.fs_frag; - } - if (d < dmax - cbase) { - acg.cg_frsum[dmax - cbase - d]++; - for (; d < dmax - cbase; d++) { - setbit(cg_blksfree(&acg), d); - acg.cg_cs.cs_nffree++; - } - } - if (sblock.fs_contigsumsize > 0) { - long *sump = cg_clustersum(&acg); - u_char *mapp = cg_clustersfree(&acg); - int map = *mapp++; - int bit = 1; - int run = 0; - - for (i = 0; i < acg.cg_nclusterblks; i++) { - if ((map & bit) != 0) { - run++; - } else if (run != 0) { - if (run > sblock.fs_contigsumsize) - run = sblock.fs_contigsumsize; - sump[run]++; - run = 0; - } - if ((i & (NBBY - 1)) != (NBBY - 1)) { - bit <<= 1; - } else { - map = *mapp++; - bit = 1; - } - } - if (run != 0) { - if (run > sblock.fs_contigsumsize) - run = sblock.fs_contigsumsize; - sump[run]++; - } - } - sblock.fs_cstotal.cs_ndir += acg.cg_cs.cs_ndir; - sblock.fs_cstotal.cs_nffree += acg.cg_cs.cs_nffree; - sblock.fs_cstotal.cs_nbfree += acg.cg_cs.cs_nbfree; - sblock.fs_cstotal.cs_nifree += acg.cg_cs.cs_nifree; - *cs = acg.cg_cs; - wtfs(fsbtodb(&sblock, cgtod(&sblock, cylno)), - sblock.fs_bsize, (char *)&acg); -} - -/* - * initialize the file system - */ -struct dinode node; - -#ifdef LOSTDIR -#define PREDEFDIR 3 -#else -#define PREDEFDIR 2 -#endif - -struct directory_entry root_dir[] = { - { ROOTINO, sizeof(struct directory_entry), DT_DIR, 1, "." }, - { ROOTINO, sizeof(struct directory_entry), DT_DIR, 2, ".." }, -#ifdef LOSTDIR - { LOSTFOUNDINO, sizeof(struct directory_entry), DT_DIR, 10, "lost+found" }, -#endif -}; -struct odirectory_entry { - u_long d_ino; - u_short d_reclen; - u_short d_namlen; - u_char d_name[MAXNAMLEN + 1]; -} oroot_dir[] = { - { ROOTINO, sizeof(struct directory_entry), 1, "." }, - { ROOTINO, sizeof(struct directory_entry), 2, ".." }, -#ifdef LOSTDIR - { LOSTFOUNDINO, sizeof(struct directory_entry), 10, "lost+found" }, -#endif -}; -#ifdef LOSTDIR -struct directory_entry lost_found_dir[] = { - { LOSTFOUNDINO, sizeof(struct directory_entry), DT_DIR, 1, "." }, - { ROOTINO, sizeof(struct directory_entry), DT_DIR, 2, ".." }, - { 0, DIRBLKSIZ, 0, 0, 0 }, -}; -struct odirectory_entry olost_found_dir[] = { - { LOSTFOUNDINO, sizeof(struct directory_entry), 1, "." }, - { ROOTINO, sizeof(struct directory_entry), 2, ".." }, - { 0, DIRBLKSIZ, 0, 0 }, -}; -#endif -char buf[MAXBSIZE]; - -void -fsinit(utime) - time_t utime; -{ - /* - * initialize the node - */ - node.di_atime.tv_sec = utime; - node.di_mtime.tv_sec = utime; - node.di_ctime.tv_sec = utime; -#ifdef LOSTDIR - /* - * create the lost+found directory - */ - if (Oflag) { - (void)makedir((struct directory_entry *)olost_found_dir, 2); - for (i = DIRBLKSIZ; i < sblock.fs_bsize; i += DIRBLKSIZ) - bcopy(&olost_found_dir[2], &buf[i], - DIRSIZ(0, &olost_found_dir[2])); - } else { - (void)makedir(lost_found_dir, 2); - for (i = DIRBLKSIZ; i < sblock.fs_bsize; i += DIRBLKSIZ) - bcopy(&lost_found_dir[2], &buf[i], - DIRSIZ(0, &lost_found_dir[2])); - } - node.di_model = ifdir | UMASK; - node.di_modeh = 0; - node.di_nlink = 2; - node.di_size = sblock.fs_bsize; - node.di_db[0] = alloc(node.di_size, DI_MODE (&node)); - node.di_blocks = btodb(fragroundup(&sblock, node.di_size)); - wtfs(fsbtodb(&sblock, node.di_db[0]), node.di_size, buf); - iput(&node, LOSTFOUNDINO); -#endif - /* - * create the root directory - */ - node.di_model = IFDIR | UMASK; - node.di_modeh = 0; - node.di_nlink = PREDEFDIR; - - /* Set the uid/gid to non-root if run by a non-root user. This - is what mke2fs does in e2fsprogs-1.18 (actually it uses the - real IDs iff geteuid()!=0, but that is just wrong). */ - node.di_uid = geteuid(); - if (node.di_uid != 0) - node.di_gid = getegid(); - - if (Oflag) - node.di_size = makedir((struct directory_entry *)oroot_dir, PREDEFDIR); - else - node.di_size = makedir(root_dir, PREDEFDIR); - node.di_db[0] = alloc(sblock.fs_fsize, DI_MODE (&node)); - node.di_blocks = btodb(fragroundup(&sblock, node.di_size)); - wtfs(fsbtodb(&sblock, node.di_db[0]), sblock.fs_fsize, buf); - iput(&node, ROOTINO); -} - -/* - * construct a set of directory entries in "buf". - * return size of directory. - */ -int -makedir(protodir, entries) - register struct directory_entry *protodir; - int entries; -{ - char *cp; - int i, spcleft; - - spcleft = DIRBLKSIZ; - for (cp = buf, i = 0; i < entries - 1; i++) { - protodir[i].d_reclen = DIRSIZ(0, &protodir[i]); - bcopy(&protodir[i], cp, protodir[i].d_reclen); - cp += protodir[i].d_reclen; - spcleft -= protodir[i].d_reclen; - } - protodir[i].d_reclen = spcleft; - bcopy(&protodir[i], cp, DIRSIZ(0, &protodir[i])); - return (DIRBLKSIZ); -} - -/* - * allocate a block or frag - */ -daddr_t -alloc(size, mode) - int size; - int mode; -{ - int i, frag; - daddr_t d, blkno; - - rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, - (char *)&acg); - if (acg.cg_magic != CG_MAGIC) { - deverr (0, 0, "cg 0: bad magic number"); - return (0); - } - if (acg.cg_cs.cs_nbfree == 0) { - deverr (0, 0, "first cylinder group ran out of space"); - return (0); - } - for (d = 0; d < acg.cg_ndblk; d += sblock.fs_frag) - if (isblock(&sblock, cg_blksfree(&acg), d / sblock.fs_frag)) - goto goth; - deverr (0, 0, "internal error: can't find block in cyl 0"); - return (0); -goth: - blkno = fragstoblks(&sblock, d); - clrblock(&sblock, cg_blksfree(&acg), blkno); - if (sblock.fs_contigsumsize > 0) - clrbit(cg_clustersfree(&acg), blkno); - acg.cg_cs.cs_nbfree--; - sblock.fs_cstotal.cs_nbfree--; - fscs[0].cs_nbfree--; - if (mode & IFDIR) { - acg.cg_cs.cs_ndir++; - sblock.fs_cstotal.cs_ndir++; - fscs[0].cs_ndir++; - } - cg_blktot(&acg)[cbtocylno(&sblock, d)]--; - cg_blks(&sblock, &acg, cbtocylno(&sblock, d))[cbtorpos(&sblock, d)]--; - if (size != sblock.fs_bsize) { - frag = howmany(size, sblock.fs_fsize); - fscs[0].cs_nffree += sblock.fs_frag - frag; - sblock.fs_cstotal.cs_nffree += sblock.fs_frag - frag; - acg.cg_cs.cs_nffree += sblock.fs_frag - frag; - acg.cg_frsum[sblock.fs_frag - frag]++; - for (i = frag; i < sblock.fs_frag; i++) - setbit(cg_blksfree(&acg), d + i); - } - wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, - (char *)&acg); - return (d); -} - -/* - * Allocate an inode on the disk - */ -void -iput(ip, ino) - register struct dinode *ip; - register ino_t ino; -{ - struct dinode buf[MAXINOPB]; - daddr_t d; - int c; - - c = ino_to_cg(&sblock, ino); - rdfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, - (char *)&acg); - if (acg.cg_magic != CG_MAGIC) - deverr (31, 0, "cg 0: bad magic number"); - acg.cg_cs.cs_nifree--; - setbit(cg_inosused(&acg), ino); - wtfs(fsbtodb(&sblock, cgtod(&sblock, 0)), sblock.fs_cgsize, - (char *)&acg); - sblock.fs_cstotal.cs_nifree--; - fscs[0].cs_nifree--; - if (ino >= sblock.fs_ipg * sblock.fs_ncg) - deverr (32, 0, "fsinit: inode value out of range (%Ld)", ino); - d = fsbtodb(&sblock, ino_to_fsba(&sblock, ino)); - rdfs(d, sblock.fs_bsize, buf); - buf[ino_to_fsbo(&sblock, ino)] = *ip; - wtfs(d, sblock.fs_bsize, buf); -} - -/* - * read a block from the file system - */ -void -rdfs(bno, size, bf) - daddr_t bno; - int size; - char *bf; -{ - int n; - if (lseek(fsi, (off_t)bno * sectorsize, 0) < 0) - deverr (33, errno, "rdfs: %ld: seek error", bno); - n = read(fsi, bf, size); - if (n != size) - deverr (34, errno, "rdfs: %ld: read error", bno); -} - -/* - * write a block to the file system - */ -void -wtfs(bno, size, bf) - daddr_t bno; - int size; - char *bf; -{ - int n; - if (Nflag) - return; - if (lseek(fso, (off_t)bno * sectorsize, SEEK_SET) < 0) - deverr (35, errno, "wtfs: %ld: seek error", bno); - n = write(fso, bf, size); - if (n != size) - deverr (36, errno, "wtfs: %ld: write error", bno); -} - -/* - * check if a block is available - */ -int -isblock(fs, cp, h) - struct fs *fs; - unsigned char *cp; - int h; -{ - unsigned char mask; - - switch (fs->fs_frag) { - case 8: - return (cp[h] == 0xff); - case 4: - mask = 0x0f << ((h & 0x1) << 2); - return ((cp[h >> 1] & mask) == mask); - case 2: - mask = 0x03 << ((h & 0x3) << 1); - return ((cp[h >> 2] & mask) == mask); - case 1: - mask = 0x01 << (h & 0x7); - return ((cp[h >> 3] & mask) == mask); - default: - deverr (0, 0, "isblock bad fs_frag %ld", fs->fs_frag); - return (0); - } -} - -/* - * take a block out of the map - */ -void -clrblock(fs, cp, h) - struct fs *fs; - unsigned char *cp; - int h; -{ - switch ((fs)->fs_frag) { - case 8: - cp[h] = 0; - return; - case 4: - cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); - return; - case 2: - cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); - return; - case 1: - cp[h >> 3] &= ~(0x01 << (h & 0x7)); - return; - default: - deverr (0, 0, "clrblock bad fs_frag %ld", fs->fs_frag); - return; - } -} - -/* - * put a block into the map - */ -void -setblock(fs, cp, h) - struct fs *fs; - unsigned char *cp; - int h; -{ - switch (fs->fs_frag) { - case 8: - cp[h] = 0xff; - return; - case 4: - cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); - return; - case 2: - cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); - return; - case 1: - cp[h >> 3] |= (0x01 << (h & 0x7)); - return; - default: - deverr (0, 0, "setblock bad fs_frag %ld", fs->fs_frag); - return; - } -} |