factor *colorFactor (int nv, cvertex * vl) { /* - calculate color weight (two int n,d) - 08/01/90 */ cgraph * cg; int n0,i,j; factor *f=(factor *)malloc(sizeof(factor)); cgraph model; fct_init(f); SIZE= sizeof(model) + (nv)*((char*)&model.vl[1]-(char*)&model.vl[0]); MAXGLEN=nv+2; cg = (cgraph *) malloc(SIZE); initcg(cg); cg->gl=nv; cg->next=NULL; cg->en=0; for(i=0; i<nv; i++) { cg->vl[i]=vl[i]; for(j=0; j<3; j++) if(vl[i].e[j]>cg->en) cg->en=vl[i].e[j]; } # if (CDEBLEV > DEBLEV) wrcg(cg); # endif remtv(cg); # if (CDEBLEV > DEBLEV) wrcg(cg); # endif while(cg) { cgraph * pgl; while (cg->gl && cg->sgn) if (findv(qg,cg,&n0)) remg(n0,&(cg)); else if (findv(g3,cg,&n0)) exp3g(n0,&(cg)); else cerror(251,"CWTarG: Invalid type of vertex."); pgl = cg; if(pgl->sgn) add_fct(f,pgl->sgn,pgl->pow2,pgl->powN,pgl->powNN_1); cg = cg->next; free(pgl); } return f; }
struct fs * ffs_mkfs(const char *fsys, const fsinfo_t *fsopts, time_t tstamp) { int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg; int32_t cylno, i, csfrags; long long sizepb; void *space; int size, blks; int nprintcols, printcolwidth; ffs_opt_t *ffs_opts = fsopts->fs_specific; Oflag = ffs_opts->version; fssize = fsopts->size / fsopts->sectorsize; sectorsize = fsopts->sectorsize; fsize = ffs_opts->fsize; bsize = ffs_opts->bsize; maxbsize = ffs_opts->maxbsize; maxblkspercg = ffs_opts->maxblkspercg; minfree = ffs_opts->minfree; opt = ffs_opts->optimization; density = ffs_opts->density; maxcontig = ffs_opts->maxcontig; maxbpg = ffs_opts->maxbpg; avgfilesize = ffs_opts->avgfilesize; avgfpdir = ffs_opts->avgfpdir; bbsize = BBSIZE; sbsize = SBLOCKSIZE; strlcpy(sblock.fs_volname, ffs_opts->label, sizeof(sblock.fs_volname)); if (Oflag == 0) { sblock.fs_old_inodefmt = FS_42INODEFMT; sblock.fs_maxsymlinklen = 0; sblock.fs_old_flags = 0; } else { sblock.fs_old_inodefmt = FS_44INODEFMT; sblock.fs_maxsymlinklen = (Oflag == 1 ? MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2); sblock.fs_old_flags = FS_FLAGS_UPDATED; sblock.fs_flags = 0; } /* * Validate the given file system size. * Verify that its last block can actually be accessed. * Convert to file system fragment sized units. */ if (fssize <= 0) { printf("preposterous size %lld\n", (long long)fssize); exit(13); } ffs_wtfs(fssize - 1, sectorsize, (char *)&sblock, fsopts); /* * collect and verify the filesystem density info */ sblock.fs_avgfilesize = avgfilesize; sblock.fs_avgfpdir = avgfpdir; if (sblock.fs_avgfilesize <= 0) printf("illegal expected average file size %d\n", sblock.fs_avgfilesize), exit(14); if (sblock.fs_avgfpdir <= 0) printf("illegal expected number of files per directory %d\n", sblock.fs_avgfpdir), exit(15); /* * collect and verify the block and fragment sizes */ sblock.fs_bsize = bsize; sblock.fs_fsize = fsize; if (!POWEROF2(sblock.fs_bsize)) { printf("block size must be a power of 2, not %d\n", sblock.fs_bsize); exit(16); } if (!POWEROF2(sblock.fs_fsize)) { printf("fragment size must be a power of 2, not %d\n", sblock.fs_fsize); exit(17); } if (sblock.fs_fsize < sectorsize) { printf("fragment size %d is too small, minimum is %d\n", sblock.fs_fsize, sectorsize); exit(18); } if (sblock.fs_bsize < MINBSIZE) { printf("block size %d is too small, minimum is %d\n", sblock.fs_bsize, MINBSIZE); exit(19); } if (sblock.fs_bsize > FFS_MAXBSIZE) { printf("block size %d is too large, maximum is %d\n", sblock.fs_bsize, FFS_MAXBSIZE); exit(19); } if (sblock.fs_bsize < sblock.fs_fsize) { printf("block size (%d) cannot be smaller than fragment size (%d)\n", sblock.fs_bsize, sblock.fs_fsize); exit(20); } if (maxbsize < bsize || !POWEROF2(maxbsize)) { sblock.fs_maxbsize = sblock.fs_bsize; printf("Extent size set to %d\n", sblock.fs_maxbsize); } else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) { sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize; printf("Extent size reduced to %d\n", sblock.fs_maxbsize); } else { sblock.fs_maxbsize = maxbsize; } sblock.fs_maxcontig = maxcontig; if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) { sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize; printf("Maxcontig raised to %d\n", sblock.fs_maxbsize); } if (sblock.fs_maxcontig > 1) sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG); 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) { printf("fragment size %d is too small, " "minimum with block size %d is %d\n", sblock.fs_fsize, sblock.fs_bsize, sblock.fs_bsize / MAXFRAG); exit(21); } sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize); sblock.fs_size = sblock.fs_providersize = fssize = dbtofsb(&sblock, fssize); if (Oflag <= 1) { sblock.fs_magic = FS_UFS1_MAGIC; sblock.fs_sblockloc = SBLOCK_UFS1; sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs1_daddr_t); sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode); sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * sizeof (ufs1_daddr_t)); sblock.fs_old_inodefmt = FS_44INODEFMT; sblock.fs_old_cgoffset = 0; sblock.fs_old_cgmask = 0xffffffff; sblock.fs_old_size = sblock.fs_size; sblock.fs_old_rotdelay = 0; sblock.fs_old_rps = 60; sblock.fs_old_nspf = sblock.fs_fsize / sectorsize; sblock.fs_old_cpg = 1; sblock.fs_old_interleave = 1; sblock.fs_old_trackskew = 0; sblock.fs_old_cpc = 0; sblock.fs_old_postblformat = 1; sblock.fs_old_nrpos = 1; } else { sblock.fs_magic = FS_UFS2_MAGIC; sblock.fs_sblockloc = SBLOCK_UFS2; sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs2_daddr_t); sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode); sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * sizeof (ufs2_daddr_t)); } sblock.fs_sblkno = roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag); sblock.fs_cblkno = (daddr_t)(sblock.fs_sblkno + roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag)); sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; 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; } /* * Calculate the number of blocks to put into each cylinder group. * * This algorithm selects the number of blocks per cylinder * group. The first goal is to have at least enough data blocks * in each cylinder group to meet the density requirement. Once * this goal is achieved we try to expand to have at least * 1 cylinder group. Once this goal is achieved, we pack as * many blocks into each cylinder group map as will fit. * * We start by calculating the smallest number of blocks that we * can put into each cylinder group. If this is too big, we reduce * the density until it fits. */ origdensity = density; for (;;) { fragsperinode = MAX(numfrags(&sblock, density), 1); minfpg = fragsperinode * INOPB(&sblock); if (minfpg > sblock.fs_size) minfpg = sblock.fs_size; sblock.fs_ipg = INOPB(&sblock); sblock.fs_fpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_fpg < minfpg) sblock.fs_fpg = minfpg; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); sblock.fs_fpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_fpg < minfpg) sblock.fs_fpg = minfpg; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) break; density -= sblock.fs_fsize; } if (density != origdensity) printf("density reduced from %d to %d\n", origdensity, density); if (maxblkspercg <= 0 || maxblkspercg >= fssize) maxblkspercg = fssize - 1; /* * Start packing more blocks into the cylinder group until * it cannot grow any larger, the number of cylinder groups * drops below 1, or we reach the size requested. */ for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) { sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (sblock.fs_size / sblock.fs_fpg < 1) break; if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) continue; if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize) break; sblock.fs_fpg -= sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); break; } /* * Check to be sure that the last cylinder group has enough blocks * to be viable. If it is too small, reduce the number of blocks * per cylinder group which will have the effect of moving more * blocks into the last cylinder group. */ optimalfpg = sblock.fs_fpg; for (;;) { sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); lastminfpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_size < lastminfpg) { printf("Filesystem size %lld < minimum size of %d\n", (long long)sblock.fs_size, lastminfpg); exit(28); } if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || sblock.fs_size % sblock.fs_fpg == 0) break; sblock.fs_fpg -= sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); } if (optimalfpg != sblock.fs_fpg) printf("Reduced frags per cylinder group from %d to %d %s\n", optimalfpg, sblock.fs_fpg, "to enlarge last cyl group"); sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); if (Oflag <= 1) { sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf; sblock.fs_old_nsect = sblock.fs_old_spc; sblock.fs_old_npsect = sblock.fs_old_spc; sblock.fs_old_ncyl = sblock.fs_ncg; } /* * 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)); /* * Setup memory for temporary in-core cylgroup summaries. * Cribbed from ffs_mountfs(). */ size = sblock.fs_cssize; blks = howmany(size, sblock.fs_fsize); if (sblock.fs_contigsumsize > 0) size += sblock.fs_ncg * sizeof(int32_t); if ((space = (char *)calloc(1, size)) == NULL) err(1, "memory allocation error for cg summaries"); sblock.fs_csp = space; space = (char *)space + sblock.fs_cssize; if (sblock.fs_contigsumsize > 0) { int32_t *lp; sblock.fs_maxcluster = lp = space; for (i = 0; i < sblock.fs_ncg; i++) *lp++ = sblock.fs_contigsumsize; } sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); if (sblock.fs_sbsize > SBLOCKSIZE) sblock.fs_sbsize = SBLOCKSIZE; sblock.fs_minfree = minfree; sblock.fs_maxcontig = maxcontig; sblock.fs_maxbpg = maxbpg; sblock.fs_optim = opt; sblock.fs_cgrotor = 0; sblock.fs_pendingblocks = 0; sblock.fs_pendinginodes = 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_state = 0; sblock.fs_clean = FS_ISCLEAN; sblock.fs_ronly = 0; sblock.fs_id[0] = tstamp; sblock.fs_id[1] = random(); sblock.fs_fsmnt[0] = '\0'; csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); sblock.fs_cstotal.cs_nbfree = fragstoblks(&sblock, sblock.fs_dsize) - howmany(csfrags, sblock.fs_frag); sblock.fs_cstotal.cs_nffree = fragnum(&sblock, sblock.fs_size) + (fragnum(&sblock, csfrags) > 0 ? sblock.fs_frag - fragnum(&sblock, csfrags) : 0); sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; sblock.fs_cstotal.cs_ndir = 0; sblock.fs_dsize -= csfrags; sblock.fs_time = tstamp; if (Oflag <= 1) { sblock.fs_old_time = tstamp; sblock.fs_old_dsize = sblock.fs_dsize; sblock.fs_old_csaddr = sblock.fs_csaddr; sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; } /* * Dump out summary information about file system. */ #define B2MBFACTOR (1 / (1024.0 * 1024.0)) printf("%s: %.1fMB (%lld sectors) block size %d, " "fragment size %d\n", fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, (long long)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, sblock.fs_fsize); printf("\tusing %d cylinder groups of %.2fMB, %d blks, " "%d inodes.\n", sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); #undef B2MBFACTOR /* * Now determine how wide each column will be, and calculate how * many columns will fit in a 76 char line. 76 is the width of the * subwindows in sysinst. */ printcolwidth = count_digits( fsbtodb(&sblock, cgsblock(&sblock, sblock.fs_ncg -1))); nprintcols = 76 / (printcolwidth + 2); /* * allocate space for superblock, cylinder group map, and * two sets of inode blocks. */ if (sblock.fs_bsize < SBLOCKSIZE) iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize; else iobufsize = 4 * sblock.fs_bsize; if ((iobuf = malloc(iobufsize)) == NULL) { printf("Cannot allocate I/O buffer\n"); exit(38); } memset(iobuf, 0, iobufsize); /* * Make a copy of the superblock into the buffer that we will be * writing out in each cylinder group. */ memcpy(writebuf, &sblock, sbsize); if (fsopts->needswap) ffs_sb_swap(&sblock, (struct fs*)writebuf); memcpy(iobuf, writebuf, SBLOCKSIZE); printf("super-block backups (for fsck -b #) at:"); for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { initcg(cylno, tstamp, fsopts); if (cylno % nprintcols == 0) printf("\n"); printf(" %*lld,", printcolwidth, (long long)fsbtodb(&sblock, cgsblock(&sblock, cylno))); fflush(stdout); } printf("\n"); /* * Now construct the initial file system, * then write out the super-block. */ sblock.fs_time = tstamp; if (Oflag <= 1) { sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; } if (fsopts->needswap) sblock.fs_flags |= FS_SWAPPED; ffs_write_superblock(&sblock, fsopts); return (&sblock); }
void mkfs(struct partition *pp, char *fsys) { int fragsperinode, optimalfpg, origdensity, minfpg, lastminfpg; long i, j, csfrags; uint cg; time_t utime; quad_t sizepb; int width; ino_t maxinum; int minfragsperinode; /* minimum ratio of frags to inodes */ char tmpbuf[100]; /* XXX this will break in about 2,500 years */ union { struct fs fdummy; char cdummy[SBLOCKSIZE]; } dummy; #define fsdummy dummy.fdummy #define chdummy dummy.cdummy /* * Our blocks == sector size, and the version of UFS we are using is * specified by Oflag. */ disk.d_bsize = sectorsize; disk.d_ufs = Oflag; if (Rflag) { utime = 1000000000; } else { time(&utime); arc4random_stir(); } sblock.fs_old_flags = FS_FLAGS_UPDATED; sblock.fs_flags = 0; if (Uflag) sblock.fs_flags |= FS_DOSOFTDEP; if (Lflag) strlcpy(sblock.fs_volname, volumelabel, MAXVOLLEN); if (Jflag) sblock.fs_flags |= FS_GJOURNAL; if (lflag) sblock.fs_flags |= FS_MULTILABEL; if (tflag) sblock.fs_flags |= FS_TRIM; /* * Validate the given file system size. * Verify that its last block can actually be accessed. * Convert to file system fragment sized units. */ if (fssize <= 0) { printf("preposterous size %jd\n", (intmax_t)fssize); exit(13); } wtfs(fssize - (realsectorsize / DEV_BSIZE), realsectorsize, (char *)&sblock); /* * collect and verify the file system density info */ sblock.fs_avgfilesize = avgfilesize; sblock.fs_avgfpdir = avgfilesperdir; if (sblock.fs_avgfilesize <= 0) printf("illegal expected average file size %d\n", sblock.fs_avgfilesize), exit(14); if (sblock.fs_avgfpdir <= 0) printf("illegal expected number of files per directory %d\n", sblock.fs_avgfpdir), exit(15); restart: /* * collect and verify the block and fragment sizes */ sblock.fs_bsize = bsize; sblock.fs_fsize = fsize; if (!POWEROF2(sblock.fs_bsize)) { printf("block size must be a power of 2, not %d\n", sblock.fs_bsize); exit(16); } if (!POWEROF2(sblock.fs_fsize)) { printf("fragment size must be a power of 2, not %d\n", sblock.fs_fsize); exit(17); } if (sblock.fs_fsize < sectorsize) { printf("increasing fragment size from %d to sector size (%d)\n", sblock.fs_fsize, sectorsize); sblock.fs_fsize = sectorsize; } if (sblock.fs_bsize > MAXBSIZE) { printf("decreasing block size from %d to maximum (%d)\n", sblock.fs_bsize, MAXBSIZE); sblock.fs_bsize = MAXBSIZE; } if (sblock.fs_bsize < MINBSIZE) { printf("increasing block size from %d to minimum (%d)\n", sblock.fs_bsize, MINBSIZE); sblock.fs_bsize = MINBSIZE; } if (sblock.fs_fsize > MAXBSIZE) { printf("decreasing fragment size from %d to maximum (%d)\n", sblock.fs_fsize, MAXBSIZE); sblock.fs_fsize = MAXBSIZE; } if (sblock.fs_bsize < sblock.fs_fsize) { printf("increasing block size from %d to fragment size (%d)\n", sblock.fs_bsize, sblock.fs_fsize); sblock.fs_bsize = sblock.fs_fsize; } if (sblock.fs_fsize * MAXFRAG < sblock.fs_bsize) { printf( "increasing fragment size from %d to block size / %d (%d)\n", sblock.fs_fsize, MAXFRAG, sblock.fs_bsize / MAXFRAG); sblock.fs_fsize = sblock.fs_bsize / MAXFRAG; } if (maxbsize == 0) maxbsize = bsize; if (maxbsize < bsize || !POWEROF2(maxbsize)) { sblock.fs_maxbsize = sblock.fs_bsize; printf("Extent size set to %d\n", sblock.fs_maxbsize); } else if (sblock.fs_maxbsize > FS_MAXCONTIG * sblock.fs_bsize) { sblock.fs_maxbsize = FS_MAXCONTIG * sblock.fs_bsize; printf("Extent size reduced to %d\n", sblock.fs_maxbsize); } else { sblock.fs_maxbsize = maxbsize; } /* * Maxcontig sets the default for the maximum number of blocks * that may be allocated sequentially. With file system clustering * it is possible to allocate contiguous blocks up to the maximum * transfer size permitted by the controller or buffering. */ if (maxcontig == 0) maxcontig = MAX(1, MAXPHYS / bsize); sblock.fs_maxcontig = maxcontig; if (sblock.fs_maxcontig < sblock.fs_maxbsize / sblock.fs_bsize) { sblock.fs_maxcontig = sblock.fs_maxbsize / sblock.fs_bsize; printf("Maxcontig raised to %d\n", sblock.fs_maxbsize); } if (sblock.fs_maxcontig > 1) sblock.fs_contigsumsize = MIN(sblock.fs_maxcontig,FS_MAXCONTIG); 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; sblock.fs_bshift = ilog2(sblock.fs_bsize); sblock.fs_fshift = ilog2(sblock.fs_fsize); sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); sblock.fs_fragshift = ilog2(sblock.fs_frag); if (sblock.fs_frag > MAXFRAG) { printf("fragment size %d is still too small (can't happen)\n", sblock.fs_bsize / MAXFRAG); exit(21); } sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize); sblock.fs_size = fssize = dbtofsb(&sblock, fssize); sblock.fs_providersize = dbtofsb(&sblock, mediasize / sectorsize); /* * Before the filesystem is finally initialized, mark it * as incompletely initialized. */ sblock.fs_magic = FS_BAD_MAGIC; if (Oflag == 1) { sblock.fs_sblockloc = SBLOCK_UFS1; sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs1_daddr_t); sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode); sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * sizeof(ufs1_daddr_t)); sblock.fs_old_inodefmt = FS_44INODEFMT; sblock.fs_old_cgoffset = 0; sblock.fs_old_cgmask = 0xffffffff; sblock.fs_old_size = sblock.fs_size; sblock.fs_old_rotdelay = 0; sblock.fs_old_rps = 60; sblock.fs_old_nspf = sblock.fs_fsize / sectorsize; sblock.fs_old_cpg = 1; sblock.fs_old_interleave = 1; sblock.fs_old_trackskew = 0; sblock.fs_old_cpc = 0; sblock.fs_old_postblformat = 1; sblock.fs_old_nrpos = 1; } else { sblock.fs_sblockloc = SBLOCK_UFS2; sblock.fs_nindir = sblock.fs_bsize / sizeof(ufs2_daddr_t); sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode); sblock.fs_maxsymlinklen = ((NDADDR + NIADDR) * sizeof(ufs2_daddr_t)); } sblock.fs_sblkno = roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag); sblock.fs_cblkno = sblock.fs_sblkno + roundup(howmany(SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag); sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; 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; } /* * It's impossible to create a snapshot in case that fs_maxfilesize * is smaller than the fssize. */ if (sblock.fs_maxfilesize < (u_quad_t)fssize) { warnx("WARNING: You will be unable to create snapshots on this " "file system. Correct by using a larger blocksize."); } /* * Calculate the number of blocks to put into each cylinder group. * * This algorithm selects the number of blocks per cylinder * group. The first goal is to have at least enough data blocks * in each cylinder group to meet the density requirement. Once * this goal is achieved we try to expand to have at least * MINCYLGRPS cylinder groups. Once this goal is achieved, we * pack as many blocks into each cylinder group map as will fit. * * We start by calculating the smallest number of blocks that we * can put into each cylinder group. If this is too big, we reduce * the density until it fits. */ maxinum = (((int64_t)(1)) << 32) - INOPB(&sblock); minfragsperinode = 1 + fssize / maxinum; if (density == 0) { density = MAX(NFPI, minfragsperinode) * fsize; } else if (density < minfragsperinode * fsize) { origdensity = density; density = minfragsperinode * fsize; fprintf(stderr, "density increased from %d to %d\n", origdensity, density); } origdensity = density; for (;;) { fragsperinode = MAX(numfrags(&sblock, density), 1); if (fragsperinode < minfragsperinode) { bsize <<= 1; fsize <<= 1; printf("Block size too small for a file system %s %d\n", "of this size. Increasing blocksize to", bsize); goto restart; } minfpg = fragsperinode * INOPB(&sblock); if (minfpg > sblock.fs_size) minfpg = sblock.fs_size; sblock.fs_ipg = INOPB(&sblock); sblock.fs_fpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_fpg < minfpg) sblock.fs_fpg = minfpg; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); sblock.fs_fpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_fpg < minfpg) sblock.fs_fpg = minfpg; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) break; density -= sblock.fs_fsize; } if (density != origdensity) printf("density reduced from %d to %d\n", origdensity, density); /* * Start packing more blocks into the cylinder group until * it cannot grow any larger, the number of cylinder groups * drops below MINCYLGRPS, or we reach the size requested. * For UFS1 inodes per cylinder group are stored in an int16_t * so fs_ipg is limited to 2^15 - 1. */ for ( ; sblock.fs_fpg < maxblkspercg; sblock.fs_fpg += sblock.fs_frag) { sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (Oflag > 1 || (Oflag == 1 && sblock.fs_ipg <= 0x7fff)) { if (sblock.fs_size / sblock.fs_fpg < MINCYLGRPS) break; if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) continue; if (CGSIZE(&sblock) == (unsigned long)sblock.fs_bsize) break; } sblock.fs_fpg -= sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); break; } /* * Check to be sure that the last cylinder group has enough blocks * to be viable. If it is too small, reduce the number of blocks * per cylinder group which will have the effect of moving more * blocks into the last cylinder group. */ optimalfpg = sblock.fs_fpg; for (;;) { sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); lastminfpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_size < lastminfpg) { printf("Filesystem size %jd < minimum size of %d\n", (intmax_t)sblock.fs_size, lastminfpg); exit(28); } if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || sblock.fs_size % sblock.fs_fpg == 0) break; sblock.fs_fpg -= sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); } if (optimalfpg != sblock.fs_fpg) printf("Reduced frags per cylinder group from %d to %d %s\n", optimalfpg, sblock.fs_fpg, "to enlarge last cyl group"); sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); if (Oflag == 1) { sblock.fs_old_spc = sblock.fs_fpg * sblock.fs_old_nspf; sblock.fs_old_nsect = sblock.fs_old_spc; sblock.fs_old_npsect = sblock.fs_old_spc; sblock.fs_old_ncyl = sblock.fs_ncg; } /* * 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)); fscs = (struct csum *)calloc(1, sblock.fs_cssize); if (fscs == NULL) errx(31, "calloc failed"); sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); if (sblock.fs_sbsize > SBLOCKSIZE) sblock.fs_sbsize = SBLOCKSIZE; sblock.fs_minfree = minfree; if (metaspace > 0 && metaspace < sblock.fs_fpg / 2) sblock.fs_metaspace = blknum(&sblock, metaspace); else if (metaspace != -1) /* reserve half of minfree for metadata blocks */ sblock.fs_metaspace = blknum(&sblock, (sblock.fs_fpg * minfree) / 200); if (maxbpg == 0) sblock.fs_maxbpg = MAXBLKPG(sblock.fs_bsize); else sblock.fs_maxbpg = maxbpg; sblock.fs_optim = opt; sblock.fs_cgrotor = 0; sblock.fs_pendingblocks = 0; sblock.fs_pendinginodes = 0; sblock.fs_fmod = 0; sblock.fs_ronly = 0; sblock.fs_state = 0; sblock.fs_clean = 1; sblock.fs_id[0] = (long)utime; sblock.fs_id[1] = newfs_random(); sblock.fs_fsmnt[0] = '\0'; csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); sblock.fs_cstotal.cs_nbfree = fragstoblks(&sblock, sblock.fs_dsize) - howmany(csfrags, sblock.fs_frag); sblock.fs_cstotal.cs_nffree = fragnum(&sblock, sblock.fs_size) + (fragnum(&sblock, csfrags) > 0 ? sblock.fs_frag - fragnum(&sblock, csfrags) : 0); sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; sblock.fs_cstotal.cs_ndir = 0; sblock.fs_dsize -= csfrags; sblock.fs_time = utime; if (Oflag == 1) { sblock.fs_old_time = utime; sblock.fs_old_dsize = sblock.fs_dsize; sblock.fs_old_csaddr = sblock.fs_csaddr; sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; } /* * Dump out summary information about file system. */ # define B2MBFACTOR (1 / (1024.0 * 1024.0)) printf("%s: %.1fMB (%jd sectors) block size %d, fragment size %d\n", fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, sblock.fs_fsize); printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n", sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); if (sblock.fs_flags & FS_DOSOFTDEP) printf("\twith soft updates\n"); # undef B2MBFACTOR if (Eflag && !Nflag) { printf("Erasing sectors [%jd...%jd]\n", sblock.fs_sblockloc / disk.d_bsize, fsbtodb(&sblock, sblock.fs_size) - 1); berase(&disk, sblock.fs_sblockloc / disk.d_bsize, sblock.fs_size * sblock.fs_fsize - sblock.fs_sblockloc); } /* * Wipe out old UFS1 superblock(s) if necessary. */ if (!Nflag && Oflag != 1) { i = bread(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE); if (i == -1) err(1, "can't read old UFS1 superblock: %s", disk.d_error); if (fsdummy.fs_magic == FS_UFS1_MAGIC) { fsdummy.fs_magic = 0; bwrite(&disk, part_ofs + SBLOCK_UFS1 / disk.d_bsize, chdummy, SBLOCKSIZE); for (cg = 0; cg < fsdummy.fs_ncg; cg++) { if (fsbtodb(&fsdummy, cgsblock(&fsdummy, cg)) > fssize) break; bwrite(&disk, part_ofs + fsbtodb(&fsdummy, cgsblock(&fsdummy, cg)), chdummy, SBLOCKSIZE); } } } if (!Nflag) do_sbwrite(&disk); if (Xflag == 1) { printf("** Exiting on Xflag 1\n"); exit(0); } if (Xflag == 2) printf("** Leaving BAD MAGIC on Xflag 2\n"); else sblock.fs_magic = (Oflag != 1) ? FS_UFS2_MAGIC : FS_UFS1_MAGIC; /* * Now build the cylinders group blocks and * then print out indices of cylinder groups. */ printf("super-block backups (for fsck -b #) at:\n"); i = 0; width = charsperline(); /* * allocate space for superblock, cylinder group map, and * two sets of inode blocks. */ if (sblock.fs_bsize < SBLOCKSIZE) iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize; else iobufsize = 4 * sblock.fs_bsize; if ((iobuf = calloc(1, iobufsize)) == 0) { printf("Cannot allocate I/O buffer\n"); exit(38); } /* * Make a copy of the superblock into the buffer that we will be * writing out in each cylinder group. */ bcopy((char *)&sblock, iobuf, SBLOCKSIZE); for (cg = 0; cg < sblock.fs_ncg; cg++) { initcg(cg, utime); j = snprintf(tmpbuf, sizeof(tmpbuf), " %jd%s", (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cg)), cg < (sblock.fs_ncg-1) ? "," : ""); if (j < 0) tmpbuf[j = 0] = '\0'; if (i + j >= width) { printf("\n"); i = 0; } i += j; printf("%s", tmpbuf); fflush(stdout); } printf("\n"); if (Nflag) exit(0); /* * Now construct the initial file system, * then write out the super-block. */ fsinit(utime); if (Oflag == 1) { sblock.fs_old_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; sblock.fs_old_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; sblock.fs_old_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; sblock.fs_old_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; } if (Xflag == 3) { printf("** Exiting on Xflag 3\n"); exit(0); } if (!Nflag) { do_sbwrite(&disk); /* * For UFS1 filesystems with a blocksize of 64K, the first * alternate superblock resides at the location used for * the default UFS2 superblock. As there is a valid * superblock at this location, the boot code will use * it as its first choice. Thus we have to ensure that * all of its statistcs on usage are correct. */ if (Oflag == 1 && sblock.fs_bsize == 65536) wtfs(fsbtodb(&sblock, cgsblock(&sblock, 0)), sblock.fs_bsize, (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); /* * Update information about this partition in pack * label, to that it may be updated on disk. */ if (pp != NULL) { pp->p_fstype = FS_BSDFFS; pp->p_fsize = sblock.fs_fsize; pp->p_frag = sblock.fs_frag; pp->p_cpg = sblock.fs_fpg; } }
void mkfs(struct partition *pp, char *fsys, int fi, int fo, mode_t mfsmode, uid_t mfsuid, gid_t mfsgid) { time_t utime; quad_t sizepb; int i, j, width, origdensity, fragsperinode, minfpg, optimalfpg; int lastminfpg, mincylgrps; long cylno, csfrags; char tmpbuf[100]; /* XXX this will break in about 2,500 years */ if ((fsun = calloc(1, sizeof (union fs_u))) == NULL || (cgun = calloc(1, sizeof (union cg_u))) == NULL) err(1, "calloc"); #ifndef STANDALONE time(&utime); #endif if (mfs) { quad_t sz = (quad_t)fssize * sectorsize; if (sz > SIZE_T_MAX) { errno = ENOMEM; err(12, "mmap"); } membase = mmap(NULL, sz, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, (off_t)0); if (membase == MAP_FAILED) err(12, "mmap"); madvise(membase, sz, MADV_RANDOM); } fsi = fi; fso = fo; /* * Validate the given file system size. * Verify that its last block can actually be accessed. */ if (Oflag <= 1 && fssize > INT_MAX) errx(13, "preposterous size %lld, max is %d", fssize, INT_MAX); if (Oflag == 2 && fssize > MAXDISKSIZE) errx(13, "preposterous size %lld, max is %lld", fssize, MAXDISKSIZE); wtfs(fssize - 1, sectorsize, (char *)&sblock); sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT; sblock.fs_avgfilesize = avgfilesize; sblock.fs_avgfpdir = avgfilesperdir; /* * Collect and verify the block and fragment sizes. */ if (!POWEROF2(bsize)) { errx(16, "block size must be a power of 2, not %d", bsize); } if (!POWEROF2(fsize)) { errx(17, "fragment size must be a power of 2, not %d", fsize); } if (fsize < sectorsize) { errx(18, "fragment size %d is too small, minimum is %d", fsize, sectorsize); } if (bsize < MINBSIZE) { errx(19, "block size %d is too small, minimum is %d", bsize, MINBSIZE); } if (bsize > MAXBSIZE) { errx(19, "block size %d is too large, maximum is %d", bsize, MAXBSIZE); } if (bsize < fsize) { errx(20, "block size (%d) cannot be smaller than fragment size (%d)", bsize, fsize); } sblock.fs_bsize = bsize; sblock.fs_fsize = fsize; /* * Calculate the superblock bitmasks and shifts. */ 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; sblock.fs_bshift = ilog2(sblock.fs_bsize); sblock.fs_fshift = ilog2(sblock.fs_fsize); sblock.fs_frag = numfrags(&sblock, sblock.fs_bsize); if (sblock.fs_frag > MAXFRAG) { errx(21, "fragment size %d is too small, minimum with block " "size %d is %d", sblock.fs_fsize, sblock.fs_bsize, sblock.fs_bsize / MAXFRAG); } sblock.fs_fragshift = ilog2(sblock.fs_frag); sblock.fs_fsbtodb = ilog2(sblock.fs_fsize / sectorsize); sblock.fs_size = dbtofsb(&sblock, fssize); sblock.fs_nspf = sblock.fs_fsize / sectorsize; sblock.fs_maxcontig = 1; sblock.fs_nrpos = 1; sblock.fs_cpg = 1; /* * Before the file system is fully initialized, mark it as invalid. */ sblock.fs_magic = FS_BAD_MAGIC; /* * Set the remaining superblock fields. Note that for FFS1, media * geometry fields are set to fake values. This is for compatibility * with really ancient kernels that might still inspect these values. */ if (Oflag <= 1) { sblock.fs_sblockloc = SBLOCK_UFS1; sblock.fs_nindir = sblock.fs_bsize / sizeof(int32_t); sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs1_dinode); if (Oflag == 0) { sblock.fs_maxsymlinklen = 0; sblock.fs_inodefmt = FS_42INODEFMT; } else { sblock.fs_maxsymlinklen = MAXSYMLINKLEN_UFS1; sblock.fs_inodefmt = FS_44INODEFMT; } sblock.fs_cgoffset = 0; sblock.fs_cgmask = 0xffffffff; sblock.fs_ffs1_size = sblock.fs_size; sblock.fs_rotdelay = 0; sblock.fs_rps = 60; sblock.fs_interleave = 1; sblock.fs_trackskew = 0; sblock.fs_cpc = 0; } else { sblock.fs_inodefmt = FS_44INODEFMT; sblock.fs_sblockloc = SBLOCK_UFS2; sblock.fs_nindir = sblock.fs_bsize / sizeof(int64_t); sblock.fs_inopb = sblock.fs_bsize / sizeof(struct ufs2_dinode); sblock.fs_maxsymlinklen = MAXSYMLINKLEN_UFS2; } sblock.fs_sblkno = roundup(howmany(sblock.fs_sblockloc + SBLOCKSIZE, sblock.fs_fsize), sblock.fs_frag); sblock.fs_cblkno = (int32_t)(sblock.fs_sblkno + roundup(howmany(SBSIZE, sblock.fs_fsize), sblock.fs_frag)); sblock.fs_iblkno = sblock.fs_cblkno + sblock.fs_frag; 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; } #ifdef notyet /* * It is impossible to create a snapshot in case fs_maxfilesize is * smaller than fssize. */ if (sblock.fs_maxfilesize < (u_quad_t)fssize) warnx("WARNING: You will be unable to create snapshots on this " "file system. Correct by using a larger blocksize."); #endif /* * Calculate the number of blocks to put into each cylinder group. The * first goal is to have at least enough data blocks in each cylinder * group to meet the density requirement. Once this goal is achieved * we try to expand to have at least mincylgrps cylinder groups. Once * this goal is achieved, we pack as many blocks into each cylinder * group map as will fit. * * We start by calculating the smallest number of blocks that we can * put into each cylinder group. If this is too big, we reduce the * density until it fits. */ origdensity = density; for (;;) { fragsperinode = MAX(numfrags(&sblock, density), 1); minfpg = fragsperinode * INOPB(&sblock); if (minfpg > sblock.fs_size) minfpg = sblock.fs_size; sblock.fs_ipg = INOPB(&sblock); sblock.fs_fpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_fpg < minfpg) sblock.fs_fpg = minfpg; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); sblock.fs_fpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_fpg < minfpg) sblock.fs_fpg = minfpg; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (CGSIZE(&sblock) < (unsigned long)sblock.fs_bsize) break; density -= sblock.fs_fsize; } if (density != origdensity) warnx("density reduced from %d to %d bytes per inode", origdensity, density); /* * Use a lower value for mincylgrps if the user specified a large * number of blocks per cylinder group. This is needed for, e.g. the * install media which needs to pack 2 files very tightly. */ mincylgrps = MINCYLGRPS; if (maxfrgspercg != INT_MAX) { i = sblock.fs_size / maxfrgspercg; if (i < MINCYLGRPS) mincylgrps = i <= 0 ? 1 : i; } /* * Start packing more blocks into the cylinder group until it cannot * grow any larger, the number of cylinder groups drops below * mincylgrps, or we reach the requested size. */ for (;;) { sblock.fs_fpg += sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (sblock.fs_fpg > maxfrgspercg || sblock.fs_size / sblock.fs_fpg < mincylgrps || CGSIZE(&sblock) > (unsigned long)sblock.fs_bsize) break; } sblock.fs_fpg -= sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); if (sblock.fs_fpg > maxfrgspercg) warnx("can't honour -c: minimum is %d", sblock.fs_fpg); /* * Check to be sure that the last cylinder group has enough blocks to * be viable. If it is too small, reduce the number of blocks per * cylinder group which will have the effect of moving more blocks into * the last cylinder group. */ optimalfpg = sblock.fs_fpg; for (;;) { sblock.fs_ncg = howmany(sblock.fs_size, sblock.fs_fpg); lastminfpg = roundup(sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock), sblock.fs_frag); if (sblock.fs_size < lastminfpg) errx(28, "file system size %jd < minimum size of %d", (intmax_t)sblock.fs_size, lastminfpg); if (sblock.fs_size % sblock.fs_fpg >= lastminfpg || sblock.fs_size % sblock.fs_fpg == 0) break; sblock.fs_fpg -= sblock.fs_frag; sblock.fs_ipg = roundup(howmany(sblock.fs_fpg, fragsperinode), INOPB(&sblock)); } if (optimalfpg != sblock.fs_fpg) warnx("reduced number of fragments per cylinder group from %d" " to %d to enlarge last cylinder group", optimalfpg, sblock.fs_fpg); /* * Back to filling superblock fields. */ if (Oflag <= 1) { sblock.fs_spc = sblock.fs_fpg * sblock.fs_nspf; sblock.fs_nsect = sblock.fs_spc; sblock.fs_npsect = sblock.fs_spc; sblock.fs_ncyl = sblock.fs_ncg; } sblock.fs_cgsize = fragroundup(&sblock, CGSIZE(&sblock)); sblock.fs_dblkno = sblock.fs_iblkno + sblock.fs_ipg / INOPF(&sblock); sblock.fs_csaddr = cgdmin(&sblock, 0); sblock.fs_cssize = fragroundup(&sblock, sblock.fs_ncg * sizeof(struct csum)); fscs = (struct csum *)calloc(1, sblock.fs_cssize); if (fscs == NULL) errx(31, "calloc failed"); sblock.fs_sbsize = fragroundup(&sblock, sizeof(struct fs)); if (sblock.fs_sbsize > SBLOCKSIZE) sblock.fs_sbsize = SBLOCKSIZE; sblock.fs_minfree = minfree; sblock.fs_maxbpg = maxbpg; sblock.fs_optim = opt; sblock.fs_cgrotor = 0; sblock.fs_pendingblocks = 0; sblock.fs_pendinginodes = 0; sblock.fs_fmod = 0; sblock.fs_ronly = 0; sblock.fs_state = 0; sblock.fs_clean = 1; sblock.fs_id[0] = (u_int32_t)utime; sblock.fs_id[1] = (u_int32_t)arc4random(); sblock.fs_fsmnt[0] = '\0'; csfrags = howmany(sblock.fs_cssize, sblock.fs_fsize); sblock.fs_dsize = sblock.fs_size - sblock.fs_sblkno - sblock.fs_ncg * (sblock.fs_dblkno - sblock.fs_sblkno); sblock.fs_cstotal.cs_nbfree = fragstoblks(&sblock, sblock.fs_dsize) - howmany(csfrags, sblock.fs_frag); sblock.fs_cstotal.cs_nffree = fragnum(&sblock, sblock.fs_size) + (fragnum(&sblock, csfrags) > 0 ? sblock.fs_frag - fragnum(&sblock, csfrags) : 0); sblock.fs_cstotal.cs_nifree = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; sblock.fs_cstotal.cs_ndir = 0; sblock.fs_dsize -= csfrags; sblock.fs_time = utime; if (Oflag <= 1) { sblock.fs_ffs1_time = sblock.fs_time; sblock.fs_ffs1_dsize = sblock.fs_dsize; sblock.fs_ffs1_csaddr = sblock.fs_csaddr; sblock.fs_ffs1_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; sblock.fs_ffs1_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; sblock.fs_ffs1_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; sblock.fs_ffs1_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; } /* * Dump out summary information about file system. */ if (!mfs) { #define B2MBFACTOR (1 / (1024.0 * 1024.0)) printf("%s: %.1fMB in %jd sectors of %d bytes\n", fsys, (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, (intmax_t)fsbtodb(&sblock, sblock.fs_size), sectorsize); printf("%d cylinder groups of %.2fMB, %d blocks, %d" " inodes each\n", sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); #undef B2MBFACTOR } /* * Wipe out old FFS1 superblock if necessary. */ if (Oflag >= 2) { union fs_u *fsun1; struct fs *fs1; fsun1 = calloc(1, sizeof(union fs_u)); if (fsun1 == NULL) err(39, "calloc"); fs1 = &fsun1->fs; rdfs(SBLOCK_UFS1 / sectorsize, SBSIZE, (char *)fs1); if (fs1->fs_magic == FS_UFS1_MAGIC) { fs1->fs_magic = FS_BAD_MAGIC; wtfs(SBLOCK_UFS1 / sectorsize, SBSIZE, (char *)fs1); } free(fsun1); } wtfs((int)sblock.fs_sblockloc / sectorsize, SBSIZE, (char *)&sblock); sblock.fs_magic = (Oflag <= 1) ? FS_UFS1_MAGIC : FS_UFS2_MAGIC; /* * Now build the cylinders group blocks and * then print out indices of cylinder groups. */ if (!quiet) printf("super-block backups (for fsck -b #) at:\n"); #ifndef STANDALONE else if (!mfs && isatty(STDIN_FILENO)) { signal(SIGINFO, siginfo); cur_fsys = fsys; } #endif i = 0; width = charsperline(); /* * Allocate space for superblock, cylinder group map, and two sets of * inode blocks. */ if (sblock.fs_bsize < SBLOCKSIZE) iobufsize = SBLOCKSIZE + 3 * sblock.fs_bsize; else iobufsize = 4 * sblock.fs_bsize; if ((iobuf = malloc(iobufsize)) == 0) errx(38, "cannot allocate I/O buffer"); bzero(iobuf, iobufsize); /* * Make a copy of the superblock into the buffer that we will be * writing out in each cylinder group. */ bcopy((char *)&sblock, iobuf, SBLOCKSIZE); for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { cur_cylno = (sig_atomic_t)cylno; initcg(cylno, utime); if (quiet) continue; j = snprintf(tmpbuf, sizeof tmpbuf, " %lld,", fsbtodb(&sblock, cgsblock(&sblock, cylno))); if (j >= sizeof tmpbuf) j = sizeof tmpbuf - 1; if (j == -1 || i+j >= width) { printf("\n"); i = 0; } i += j; printf("%s", tmpbuf); fflush(stdout); } if (!quiet) printf("\n"); if (Nflag && !mfs) exit(0); /* * Now construct the initial file system, then write out the superblock. */ if (Oflag <= 1) { if (fsinit1(utime, mfsmode, mfsuid, mfsgid)) errx(32, "fsinit1 failed"); sblock.fs_ffs1_cstotal.cs_ndir = sblock.fs_cstotal.cs_ndir; sblock.fs_ffs1_cstotal.cs_nbfree = sblock.fs_cstotal.cs_nbfree; sblock.fs_ffs1_cstotal.cs_nifree = sblock.fs_cstotal.cs_nifree; sblock.fs_ffs1_cstotal.cs_nffree = sblock.fs_cstotal.cs_nffree; } else { if (fsinit2(utime)) errx(32, "fsinit2 failed"); } wtfs((int)sblock.fs_sblockloc / 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); /* * Update information about this partion in pack label, to that it may * be updated on disk. */ pp->p_fstype = FS_BSDFFS; pp->p_fragblock = DISKLABELV1_FFS_FRAGBLOCK(sblock.fs_fsize, sblock.fs_frag); pp->p_cpg = sblock.fs_cpg; }
void mke2fs(const char *fsys, int fi, int fo) { struct timeval tv; int64_t minfssize; uint bcount, fbcount, ficount; uint blocks_gd, blocks_per_cg, inodes_per_cg, iblocks_per_cg; uint minblocks_per_cg, blocks_lastcg; uint ncg, cylno, sboff; uuid_t uuid; uint32_t uustat; int i, len, col, delta, fld_width, max_cols; struct winsize winsize; gettimeofday(&tv, NULL); fsi = fi; fso = fo; /* * collect and verify the block and fragment sizes */ if (!powerof2(bsize)) { errx(EXIT_FAILURE, "block size must be a power of 2, not %u\n", bsize); } if (!powerof2(fsize)) { errx(EXIT_FAILURE, "fragment size must be a power of 2, not %u\n", fsize); } if (fsize < sectorsize) { errx(EXIT_FAILURE, "fragment size %u is too small, minimum is %u\n", fsize, sectorsize); } if (bsize < MINBSIZE) { errx(EXIT_FAILURE, "block size %u is too small, minimum is %u\n", bsize, MINBSIZE); } if (bsize > EXT2_MAXBSIZE) { errx(EXIT_FAILURE, "block size %u is too large, maximum is %u\n", bsize, MAXBSIZE); } if (bsize != fsize) { /* * There is no fragment support on current ext2fs (yet?), * but some kernel code refers fsize or fpg as bsize or bpg * and Linux seems to set the same values to them. */ errx(EXIT_FAILURE, "block size (%u) can't be different from " "fragment size (%u)\n", bsize, fsize); } /* variable inodesize is REV1 feature */ if (Oflag == 0 && inodesize != EXT2_REV0_DINODE_SIZE) { errx(EXIT_FAILURE, "GOOD_OLD_REV file system format" " doesn't support %d byte inode\n", inodesize); } sblock.e2fs.e2fs_log_bsize = ilog2(bsize) - LOG_MINBSIZE; /* Umm, why not e2fs_log_fsize? */ sblock.e2fs.e2fs_fsize = ilog2(fsize) - LOG_MINBSIZE; sblock.e2fs_bsize = bsize; sblock.e2fs_bshift = sblock.e2fs.e2fs_log_bsize + LOG_MINBSIZE; sblock.e2fs_qbmask = sblock.e2fs_bsize - 1; sblock.e2fs_bmask = ~sblock.e2fs_qbmask; sblock.e2fs_fsbtodb = ilog2(sblock.e2fs_bsize) - ilog2(sectorsize); sblock.e2fs_ipb = sblock.e2fs_bsize / inodesize; /* * Ext2fs preserves BBSIZE (1024 bytes) space at the top for * bootloader (though it is not enough at all for our bootloader). * If bsize == BBSIZE we have to preserve one block. * If bsize > BBSIZE, the first block already contains BBSIZE space * before superblock because superblock is allocated at SBOFF and * bsize is a power of two (i.e. 2048 bytes or more). */ sblock.e2fs.e2fs_first_dblock = (sblock.e2fs_bsize > BBSIZE) ? 0 : 1; minfssize = fsbtodb(&sblock, sblock.e2fs.e2fs_first_dblock + NBLOCK_SUPERBLOCK + 1 /* at least one group descriptor */ + NBLOCK_BLOCK_BITMAP + NBLOCK_INODE_BITMAP + 1 /* at least one inode table block */ + 1 /* at least one data block for rootdir */ + 1 /* at least one data block for data */ ); /* XXX and more? */ if (fssize < minfssize) errx(EXIT_FAILURE, "Filesystem size %" PRId64 " < minimum size of %" PRId64 "\n", fssize, minfssize); bcount = dbtofsb(&sblock, fssize); /* * While many people claim that ext2fs is a (bad) clone of ufs/ffs, * it isn't actual ffs so maybe we should call it "block group" * as their native name rather than ffs derived "cylinder group." * But we'll use the latter here since other kernel sources use it. * (I also agree "cylinder" based allocation is obsolete though) */ /* maybe "simple is the best" */ blocks_per_cg = sblock.e2fs_bsize * NBBY; ncg = howmany(bcount - sblock.e2fs.e2fs_first_dblock, blocks_per_cg); blocks_gd = howmany(sizeof(struct ext2_gd) * ncg, bsize); /* check range of inode number */ if (num_inodes < EXT2_FIRSTINO) num_inodes = EXT2_FIRSTINO; /* needs reserved inodes + 1 */ if (num_inodes > UINT16_MAX * ncg) num_inodes = UINT16_MAX * ncg; /* ext2bgd_nifree is uint16_t */ inodes_per_cg = num_inodes / ncg; iblocks_per_cg = howmany(inodesize * inodes_per_cg, bsize); /* Check that the last cylinder group has enough space for inodes */ minblocks_per_cg = NBLOCK_BLOCK_BITMAP + NBLOCK_INODE_BITMAP + iblocks_per_cg + 1; /* at least one data block */ if (Oflag == 0 || cg_has_sb(ncg - 1) != 0) minblocks_per_cg += NBLOCK_SUPERBLOCK + blocks_gd; blocks_lastcg = bcount - sblock.e2fs.e2fs_first_dblock - blocks_per_cg * (ncg - 1); if (blocks_lastcg < minblocks_per_cg) { /* * Since we make all the cylinder groups the same size, the * last will only be small if there are more than one * cylinder groups. If the last one is too small to store * filesystem data, just kill it. * * XXX: Does fsck_ext2fs(8) properly handle this case? */ bcount -= blocks_lastcg; ncg--; blocks_lastcg = blocks_per_cg; blocks_gd = howmany(sizeof(struct ext2_gd) * ncg, bsize); inodes_per_cg = num_inodes / ncg; } /* roundup inodes_per_cg to make it use whole inode table blocks */ inodes_per_cg = roundup(inodes_per_cg, sblock.e2fs_ipb); num_inodes = inodes_per_cg * ncg; iblocks_per_cg = inodes_per_cg / sblock.e2fs_ipb; /* XXX: probably we should check these adjusted values again */ sblock.e2fs.e2fs_bcount = bcount; sblock.e2fs.e2fs_icount = num_inodes; sblock.e2fs_ncg = ncg; sblock.e2fs_ngdb = blocks_gd; sblock.e2fs_itpg = iblocks_per_cg; sblock.e2fs.e2fs_rbcount = sblock.e2fs.e2fs_bcount * minfree / 100; /* e2fs_fbcount will be accounted later */ /* e2fs_ficount will be accounted later */ sblock.e2fs.e2fs_bpg = blocks_per_cg; sblock.e2fs.e2fs_fpg = blocks_per_cg; sblock.e2fs.e2fs_ipg = inodes_per_cg; sblock.e2fs.e2fs_mtime = 0; sblock.e2fs.e2fs_wtime = tv.tv_sec; sblock.e2fs.e2fs_mnt_count = 0; /* XXX: should add some entropy to avoid checking all fs at once? */ sblock.e2fs.e2fs_max_mnt_count = EXT2_DEF_MAX_MNT_COUNT; sblock.e2fs.e2fs_magic = E2FS_MAGIC; sblock.e2fs.e2fs_state = E2FS_ISCLEAN; sblock.e2fs.e2fs_beh = E2FS_BEH_DEFAULT; sblock.e2fs.e2fs_minrev = 0; sblock.e2fs.e2fs_lastfsck = tv.tv_sec; sblock.e2fs.e2fs_fsckintv = EXT2_DEF_FSCKINTV; /* * Maybe we can use E2FS_OS_FREEBSD here and it would be more proper, * but the purpose of this newfs_ext2fs(8) command is to provide * a filesystem which can be recognized by firmware on some * Linux based appliances that can load bootstrap files only from * (their native) ext2fs, and anyway we will (and should) try to * act like them as much as possible. * * Anyway, I hope that all newer such boxes will keep their support * for the "GOOD_OLD_REV" ext2fs. */ sblock.e2fs.e2fs_creator = E2FS_OS_LINUX; if (Oflag == 0) { sblock.e2fs.e2fs_rev = E2FS_REV0; sblock.e2fs.e2fs_features_compat = 0; sblock.e2fs.e2fs_features_incompat = 0; sblock.e2fs.e2fs_features_rocompat = 0; } else { sblock.e2fs.e2fs_rev = E2FS_REV1; /* * e2fsprogs say "REV1" is "dynamic" so * it isn't quite a version and maybe it means * "extended from REV0 so check compat features." * * XXX: We don't have any native tool to activate * the EXT2F_COMPAT_RESIZE feature and * fsck_ext2fs(8) might not fix structures for it. */ sblock.e2fs.e2fs_features_compat = EXT2F_COMPAT_RESIZE; sblock.e2fs.e2fs_features_incompat = EXT2F_INCOMPAT_FTYPE; sblock.e2fs.e2fs_features_rocompat = EXT2F_ROCOMPAT_SPARSESUPER | EXT2F_ROCOMPAT_LARGEFILE; } sblock.e2fs.e2fs_ruid = geteuid(); sblock.e2fs.e2fs_rgid = getegid(); sblock.e2fs.e2fs_first_ino = EXT2_FIRSTINO; sblock.e2fs.e2fs_inode_size = inodesize; /* e2fs_block_group_nr is set on writing superblock to each group */ uuid_create(&uuid, &uustat); if (uustat != uuid_s_ok) errx(EXIT_FAILURE, "Failed to generate uuid\n"); uuid_enc_le(sblock.e2fs.e2fs_uuid, &uuid); if (volname != NULL) { if (strlen(volname) > sizeof(sblock.e2fs.e2fs_vname)) errx(EXIT_FAILURE, "Volume name is too long"); strlcpy(sblock.e2fs.e2fs_vname, volname, sizeof(sblock.e2fs.e2fs_vname)); } sblock.e2fs.e2fs_fsmnt[0] = '\0'; sblock.e2fs_fsmnt[0] = '\0'; sblock.e2fs.e2fs_algo = 0; /* XXX unsupported? */ sblock.e2fs.e2fs_prealloc = 0; /* XXX unsupported? */ sblock.e2fs.e2fs_dir_prealloc = 0; /* XXX unsupported? */ /* calculate blocks for reserved group descriptors for resize */ sblock.e2fs.e2fs_reserved_ngdb = 0; if (sblock.e2fs.e2fs_rev > E2FS_REV0 && (sblock.e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) != 0) { uint64_t target_blocks; uint target_ncg, target_ngdb, reserved_ngdb; /* reserve descriptors for size as 1024 times as current */ target_blocks = (sblock.e2fs.e2fs_bcount - sblock.e2fs.e2fs_first_dblock) * 1024ULL; /* number of blocks must be in uint32_t */ if (target_blocks > UINT32_MAX) target_blocks = UINT32_MAX; target_ncg = howmany(target_blocks, sblock.e2fs.e2fs_bpg); target_ngdb = howmany(sizeof(struct ext2_gd) * target_ncg, sblock.e2fs_bsize); /* * Reserved group descriptor blocks are preserved as * the second level double indirect reference blocks in * the EXT2_RESIZEINO inode, so the maximum number of * the blocks is NINDIR(fs). * (see also descriptions in init_resizeino() function) * * We check a number including current e2fs_ngdb here * because they will be moved into reserved gdb on * possible future size shrink, though e2fsprogs don't * seem to care about it. */ if (target_ngdb > NINDIR(&sblock)) target_ngdb = NINDIR(&sblock); reserved_ngdb = target_ngdb - sblock.e2fs_ngdb; /* make sure reserved_ngdb fits in the last cg */ if (reserved_ngdb >= blocks_lastcg - cgoverhead(ncg - 1)) reserved_ngdb = blocks_lastcg - cgoverhead(ncg - 1); if (reserved_ngdb == 0) { /* if no space for reserved gdb, disable the feature */ sblock.e2fs.e2fs_features_compat &= ~EXT2F_COMPAT_RESIZE; } sblock.e2fs.e2fs_reserved_ngdb = reserved_ngdb; } /* * Initialize group descriptors */ gd = malloc(sblock.e2fs_ngdb * bsize); if (gd == NULL) errx(EXIT_FAILURE, "Can't allocate descriptors buffer"); memset(gd, 0, sblock.e2fs_ngdb * bsize); fbcount = 0; ficount = 0; for (cylno = 0; cylno < ncg; cylno++) { uint boffset; boffset = cgbase(&sblock, cylno); if (sblock.e2fs.e2fs_rev == E2FS_REV0 || (sblock.e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) == 0 || cg_has_sb(cylno)) { boffset += NBLOCK_SUPERBLOCK + sblock.e2fs_ngdb; if (sblock.e2fs.e2fs_rev > E2FS_REV0 && (sblock.e2fs.e2fs_features_compat & EXT2F_COMPAT_RESIZE) != 0) boffset += sblock.e2fs.e2fs_reserved_ngdb; } gd[cylno].ext2bgd_b_bitmap = boffset; boffset += NBLOCK_BLOCK_BITMAP; gd[cylno].ext2bgd_i_bitmap = boffset; boffset += NBLOCK_INODE_BITMAP; gd[cylno].ext2bgd_i_tables = boffset; if (cylno == (ncg - 1)) gd[cylno].ext2bgd_nbfree = blocks_lastcg - cgoverhead(cylno); else gd[cylno].ext2bgd_nbfree = sblock.e2fs.e2fs_bpg - cgoverhead(cylno); fbcount += gd[cylno].ext2bgd_nbfree; gd[cylno].ext2bgd_nifree = sblock.e2fs.e2fs_ipg; if (cylno == 0) { /* take reserved inodes off nifree */ gd[cylno].ext2bgd_nifree -= EXT2_RESERVED_INODES; } ficount += gd[cylno].ext2bgd_nifree; gd[cylno].ext2bgd_ndirs = 0; } sblock.e2fs.e2fs_fbcount = fbcount; sblock.e2fs.e2fs_ficount = ficount; /* * Dump out summary information about file system. */ if (verbosity > 0) { printf("%s: %u.%1uMB (%" PRId64 " sectors) " "block size %u, fragment size %u\n", fsys, (uint)(((uint64_t)bcount * bsize) / (1024 * 1024)), (uint)((uint64_t)bcount * bsize - rounddown((uint64_t)bcount * bsize, 1024 * 1024)) / 1024 / 100, fssize, bsize, fsize); printf("\tusing %u block groups of %u.0MB, %u blks, " "%u inodes.\n", ncg, bsize * sblock.e2fs.e2fs_bpg / (1024 * 1024), sblock.e2fs.e2fs_bpg, sblock.e2fs.e2fs_ipg); } /* * allocate space for superblock and group descriptors */ iobufsize = (NBLOCK_SUPERBLOCK + sblock.e2fs_ngdb) * sblock.e2fs_bsize; iobuf = mmap(0, iobufsize, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0); if (iobuf == NULL) errx(EXIT_FAILURE, "Cannot allocate I/O buffer\n"); memset(iobuf, 0, iobufsize); /* * We now start writing to the filesystem */ if (!Nflag) { static const uint pbsize[] = { 1024, 2048, 4096, 0 }; uint pblock, epblock; /* * Validate the given file system size. * Verify that its last block can actually be accessed. * Convert to file system fragment sized units. */ if (fssize <= 0) errx(EXIT_FAILURE, "Preposterous size %" PRId64 "\n", fssize); wtfs(fssize - 1, sectorsize, iobuf); /* * Ensure there is nothing that looks like a filesystem * superblock anywhere other than where ours will be. * If fsck_ext2fs finds the wrong one all hell breaks loose! * * XXX: needs to check how fsck_ext2fs programs even * on other OSes determine alternate superblocks */ for (i = 0; pbsize[i] != 0; i++) { epblock = (uint64_t)bcount * bsize / pbsize[i]; for (pblock = ((pbsize[i] == SBSIZE) ? 1 : 0); pblock < epblock; pblock += pbsize[i] * NBBY /* bpg */) zap_old_sblock((daddr_t)pblock * pbsize[i] / sectorsize); } } if (verbosity >= 3) printf("super-block backups (for fsck_ext2fs -b #) at:\n"); /* If we are printing more than one line of numbers, line up columns */ fld_width = verbosity < 4 ? 1 : snprintf(NULL, 0, "%" PRIu64, (uint64_t)cgbase(&sblock, ncg - 1)); /* Get terminal width */ if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) == 0) max_cols = winsize.ws_col; else max_cols = 80; if (Nflag && verbosity == 3) /* Leave space to add " ..." after one row of numbers */ max_cols -= 4; #define BASE 0x10000 /* For some fixed-point maths */ col = 0; delta = verbosity > 2 ? 0 : max_cols * BASE / ncg; for (cylno = 0; cylno < ncg; cylno++) { fflush(stdout); initcg(cylno); if (verbosity < 2) continue; /* the first one is a master, not backup */ if (cylno == 0) continue; /* skip if this cylinder doesn't have a backup */ if (sblock.e2fs.e2fs_rev > E2FS_REV0 && (sblock.e2fs.e2fs_features_rocompat & EXT2F_ROCOMPAT_SPARSESUPER) != 0 && cg_has_sb(cylno) == 0) continue; if (delta > 0) { if (Nflag) /* No point doing dots for -N */ break; /* Print dots scaled to end near RH margin */ for (col += delta; col > BASE; col -= BASE) printf("."); continue; } /* Print superblock numbers */ len = printf(" %*" PRIu64 "," + !col, fld_width, (uint64_t)cgbase(&sblock, cylno)); col += len; if (col + len < max_cols) /* Next number fits */ continue; /* Next number won't fit, need a newline */ if (verbosity <= 3) { /* Print dots for subsequent cylinder groups */ delta = sblock.e2fs_ncg - cylno - 1; if (delta != 0) { if (Nflag) { printf(" ..."); break; } delta = max_cols * BASE / delta; } } col = 0; printf("\n"); } #undef BASE if (col > 0) printf("\n"); if (Nflag) return; /* * Now construct the initial file system, */ if (fsinit(&tv) == 0) errx(EXIT_FAILURE, "Error making filesystem"); /* * Write out the superblock and group descriptors */ sblock.e2fs.e2fs_block_group_nr = 0; sboff = 0; if (cgbase(&sblock, 0) == 0) { /* * If the first block contains the boot block sectors, * (i.e. in case of sblock.e2fs.e2fs_bsize > BBSIZE) * we have to preserve data in it. */ sboff = SBOFF; } e2fs_sbsave(&sblock.e2fs, (struct ext2fs *)(iobuf + sboff)); e2fs_cgsave(gd, (struct ext2_gd *)(iobuf + sblock.e2fs_bsize), sizeof(struct ext2_gd) * sblock.e2fs_ncg); wtfs(fsbtodb(&sblock, cgbase(&sblock, 0)) + sboff / sectorsize, iobufsize - sboff, iobuf + sboff); munmap(iobuf, iobufsize); }
/* * Here we actually start growing the file system. We basically read the * cylinder summary from the first cylinder group as we want to update * this on the fly during our various operations. First we handle the * changes in the former last cylinder group. Afterwards we create all new * cylinder groups. Now we handle the cylinder group containing the * cylinder summary which might result in a relocation of the whole * structure. In the end we write back the updated cylinder summary, the * new superblock, and slightly patched versions of the super block * copies. */ static void growfs(int fsi, int fso, unsigned int Nflag) { DBG_FUNC("growfs") time_t modtime; uint cylno; int i, j, width; char tmpbuf[100]; DBG_ENTER; time(&modtime); /* * Get the cylinder summary into the memory. */ fscs = (struct csum *)calloc((size_t)1, (size_t)sblock.fs_cssize); if (fscs == NULL) errx(1, "calloc failed"); for (i = 0; i < osblock.fs_cssize; i += osblock.fs_bsize) { rdfs(fsbtodb(&osblock, osblock.fs_csaddr + numfrags(&osblock, i)), (size_t)MIN(osblock.fs_cssize - i, osblock.fs_bsize), (void *)(((char *)fscs) + i), fsi); } #ifdef FS_DEBUG { struct csum *dbg_csp; u_int32_t dbg_csc; char dbg_line[80]; dbg_csp = fscs; for (dbg_csc = 0; dbg_csc < osblock.fs_ncg; dbg_csc++) { snprintf(dbg_line, sizeof(dbg_line), "%d. old csum in old location", dbg_csc); DBG_DUMP_CSUM(&osblock, dbg_line, dbg_csp++); } } #endif /* FS_DEBUG */ DBG_PRINT0("fscs read\n"); /* * Do all needed changes in the former last cylinder group. */ updjcg(osblock.fs_ncg - 1, modtime, fsi, fso, Nflag); /* * Dump out summary information about file system. */ #ifdef FS_DEBUG #define B2MBFACTOR (1 / (1024.0 * 1024.0)) printf("growfs: %.1fMB (%jd sectors) block size %d, fragment size %d\n", (float)sblock.fs_size * sblock.fs_fsize * B2MBFACTOR, (intmax_t)fsbtodb(&sblock, sblock.fs_size), sblock.fs_bsize, sblock.fs_fsize); printf("\tusing %d cylinder groups of %.2fMB, %d blks, %d inodes.\n", sblock.fs_ncg, (float)sblock.fs_fpg * sblock.fs_fsize * B2MBFACTOR, sblock.fs_fpg / sblock.fs_frag, sblock.fs_ipg); if (sblock.fs_flags & FS_DOSOFTDEP) printf("\twith soft updates\n"); #undef B2MBFACTOR #endif /* FS_DEBUG */ /* * Now build the cylinders group blocks and * then print out indices of cylinder groups. */ printf("super-block backups (for fsck_ffs -b #) at:\n"); i = 0; width = charsperline(); /* * Iterate for only the new cylinder groups. */ for (cylno = osblock.fs_ncg; cylno < sblock.fs_ncg; cylno++) { initcg(cylno, modtime, fso, Nflag); j = sprintf(tmpbuf, " %jd%s", (intmax_t)fsbtodb(&sblock, cgsblock(&sblock, cylno)), cylno < (sblock.fs_ncg - 1) ? "," : "" ); if (i + j >= width) { printf("\n"); i = 0; } i += j; printf("%s", tmpbuf); fflush(stdout); } printf("\n"); /* * Do all needed changes in the first cylinder group. * allocate blocks in new location */ updcsloc(modtime, fsi, fso, Nflag); /* * Now write the cylinder summary back to disk. */ for (i = 0; i < sblock.fs_cssize; i += sblock.fs_bsize) { wtfs(fsbtodb(&sblock, sblock.fs_csaddr + numfrags(&sblock, i)), (size_t)MIN(sblock.fs_cssize - i, sblock.fs_bsize), (void *)(((char *)fscs) + i), fso, Nflag); } DBG_PRINT0("fscs written\n"); #ifdef FS_DEBUG { struct csum *dbg_csp; u_int32_t dbg_csc; char dbg_line[80]; dbg_csp = fscs; for (dbg_csc = 0; dbg_csc < sblock.fs_ncg; dbg_csc++) { snprintf(dbg_line, sizeof(dbg_line), "%d. new csum in new location", dbg_csc); DBG_DUMP_CSUM(&sblock, dbg_line, dbg_csp++); } } #endif /* FS_DEBUG */ /* * Now write the new superblock back to disk. */ sblock.fs_time = modtime; wtfs(sblockloc, (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag); DBG_PRINT0("sblock written\n"); DBG_DUMP_FS(&sblock, "new initial sblock"); /* * Clean up the dynamic fields in our superblock copies. */ sblock.fs_fmod = 0; sblock.fs_clean = 1; sblock.fs_ronly = 0; sblock.fs_cgrotor = 0; sblock.fs_state = 0; memset((void *)&sblock.fs_fsmnt, 0, sizeof(sblock.fs_fsmnt)); sblock.fs_flags &= FS_DOSOFTDEP; /* * XXX * The following fields are currently distributed from the superblock * to the copies: * fs_minfree * fs_rotdelay * fs_maxcontig * fs_maxbpg * fs_minfree, * fs_optim * fs_flags regarding SOFTPDATES * * We probably should rather change the summary for the cylinder group * statistics here to the value of what would be in there, if the file * system were created initially with the new size. Therefor we still * need to find an easy way of calculating that. * Possibly we can try to read the first superblock copy and apply the * "diffed" stats between the old and new superblock by still copying * certain parameters onto that. */ /* * Write out the duplicate super blocks. */ for (cylno = 0; cylno < sblock.fs_ncg; cylno++) { wtfs(fsbtodb(&sblock, cgsblock(&sblock, cylno)), (size_t)SBLOCKSIZE, (void *)&sblock, fso, Nflag); } DBG_PRINT0("sblock copies written\n"); DBG_DUMP_FS(&sblock, "new other sblocks"); DBG_LEAVE; return; }