/* $OpenBSD: ffs.c,v 1.37 2023/04/25 08:57:11 krw Exp $ */ /* $NetBSD: ffs.c,v 1.66 2015/12/21 00:58:08 christos Exp $ */ /* * Copyright (c) 2001 Wasabi Systems, Inc. * All rights reserved. * * Written by Luke Mewburn for Wasabi Systems, Inc. * * 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 for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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. */ /* * Copyright (c) 1982, 1986, 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. 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. * * @(#)ffs_alloc.c 8.19 (Berkeley) 7/13/95 */ #include /* roundup DEV_BSIZE */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ffs/ufs_inode.h" #include "ffs/ffs_extern.h" #include "makefs.h" #include "ffs.h" #include "ffs/newfs_extern.h" #undef DIP #define DIP(dp, field) \ ((ffs_opts->version == 1) ? \ (dp)->ffs1_din.di_##field : (dp)->ffs2_din.di_##field) /* * Various file system defaults (cribbed from newfs(8)). */ #define DFL_FRAGSIZE 2048 /* fragment size */ #define DFL_BLKSIZE 16384 /* block size */ #define DFL_SECSIZE 512 /* sector size */ typedef struct { u_char *buf; /* buf for directory */ doff_t size; /* full size of buf */ doff_t cur; /* offset of current entry */ } dirbuf_t; static int ffs_create_image(const char *, fsinfo_t *); static void ffs_make_dirbuf(dirbuf_t *, const char *, fsnode *); static int ffs_populate_dir(const char *, fsnode *, fsinfo_t *); static void ffs_size_dir(fsnode *, fsinfo_t *); static void ffs_validate(const char *, fsnode *, fsinfo_t *); static void ffs_write_file(union dinode *, uint32_t, void *, fsinfo_t *); static void ffs_write_inode(union dinode *, uint32_t, const fsinfo_t *); static void *ffs_build_dinode1(struct ufs1_dinode *, dirbuf_t *, fsnode *, fsnode *, fsinfo_t *); static void *ffs_build_dinode2(struct ufs2_dinode *, dirbuf_t *, fsnode *, fsnode *, fsinfo_t *); struct disklabel *ffs_makerdroot(const fsinfo_t *); /* publicly visible functions */ void ffs_prep_opts(fsinfo_t *fsopts) { ffs_opt_t *ffs_opts = ecalloc(1, sizeof(*ffs_opts)); const option_t ffs_options[] = { { "avgfilesize", &ffs_opts->avgfilesize, OPT_INT32, 1, INT_MAX }, { "avgfpdir", &ffs_opts->avgfpdir, OPT_INT32, 1, INT_MAX }, { "bsize", &ffs_opts->bsize, OPT_INT32, 1, INT_MAX }, { "density", &ffs_opts->density, OPT_INT32, 1, INT_MAX }, { "disklabel", NULL, OPT_STRBUF, 0, 0 }, { "extent", &ffs_opts->maxbsize, OPT_INT32, 1, INT_MAX }, { "fsize", &ffs_opts->fsize, OPT_INT32, 1, INT_MAX }, { "label", ffs_opts->label, OPT_STRARRAY, 1, MAXVOLLEN }, { "maxbpcg", &ffs_opts->maxblkspercg, OPT_INT32, 1, INT_MAX }, { "maxbpg", &ffs_opts->maxbpg, OPT_INT32, 1, INT_MAX }, { "minfree", &ffs_opts->minfree, OPT_INT32, 0, 99 }, { "optimization", NULL, OPT_STRBUF, 0, 0 }, { "rdroot", &ffs_opts->rdroot, OPT_INT32, 0, 1 }, { "version", &ffs_opts->version, OPT_INT32, 1, 2 }, { .name = NULL } }; ffs_opts->bsize = -1; ffs_opts->fsize = -1; ffs_opts->density = -1; ffs_opts->minfree = MINFREE; ffs_opts->optimization = FS_OPTSPACE; ffs_opts->maxbpg = -1; ffs_opts->avgfilesize = AVFILESIZ; ffs_opts->avgfpdir = AFPDIR; ffs_opts->version = 1; ffs_opts->rdroot = 0; ffs_opts->lp = NULL; ffs_opts->pp = NULL; fsopts->fs_specific = ffs_opts; fsopts->fs_options = copy_opts(ffs_options); } void ffs_cleanup_opts(fsinfo_t *fsopts) { free(fsopts->fs_specific); free(fsopts->fs_options); } int ffs_parse_opts(const char *option, fsinfo_t *fsopts) { ffs_opt_t *ffs_opts = fsopts->fs_specific; option_t *ffs_options = fsopts->fs_options; char buf[1024]; int rv; assert(option != NULL); assert(fsopts != NULL); assert(ffs_opts != NULL); rv = set_option(ffs_options, option, buf, sizeof(buf)); if (rv == -1) return 0; if (ffs_options[rv].name == NULL) abort(); if (strcmp(ffs_options[rv].name, "disklabel") == 0) { struct disklabel *dp; dp = getdiskbyname(buf); if (dp == NULL) errx(1, "unknown disk type: %s", buf); ffs_opts->lp = emalloc(sizeof(struct disklabel)); *ffs_opts->lp = *dp; } else if (strcmp(ffs_options[rv].name, "optimization") == 0) { if (strcmp(buf, "time") == 0) { ffs_opts->optimization = FS_OPTTIME; } else if (strcmp(buf, "space") == 0) { ffs_opts->optimization = FS_OPTSPACE; } else { warnx("Invalid optimization `%s'", buf); return 0; } } return 1; } struct disklabel * ffs_makerdroot(const fsinfo_t *fsopts) { const ffs_opt_t *ffs_opts = fsopts->fs_specific; struct disklabel *lp; struct partition *pp; uint32_t rdsize, poffset; const uint32_t sectorsize = fsopts->sectorsize; const uint32_t fsize = ffs_opts->fsize; const uint32_t bsize = ffs_opts->bsize; rdsize = (fsopts->size + sectorsize - 1) / sectorsize; poffset = (fsopts->offset + sectorsize - 1) / sectorsize; lp = ecalloc(1, sizeof(struct disklabel)); lp->d_version = 1; lp->d_type = DTYPE_RDROOT; strlcpy(lp->d_typename, "rdroot", sizeof(lp->d_typename)); lp->d_npartitions = RAW_PART + 1; lp->d_secsize = sectorsize; lp->d_ntracks = lp->d_ncylinders = 1; lp->d_secpercyl = rdsize; DL_SETDSIZE(lp, rdsize); pp = &lp->d_partitions[0]; /* a.k.a. 'a' */ pp->p_fstype = FS_BSDFFS; pp->p_fragblock = DISKLABELV1_FFS_FRAGBLOCK(fsize, bsize / fsize); DL_SETPOFFSET(pp, poffset); DL_SETPSIZE(pp, rdsize - poffset); pp = &lp->d_partitions[RAW_PART]; /* a.k.a. 'c' */ DL_SETPOFFSET(pp, 0); DL_SETPSIZE(pp, DL_GETDSIZE(lp)); return lp; } void ffs_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts) { struct fs *superblock; ffs_opt_t *ffs_opts = fsopts->fs_specific; assert(image != NULL); assert(dir != NULL); assert(root != NULL); assert(fsopts != NULL); /* validate tree and options */ ffs_validate(dir, root, fsopts); printf("Calculated size of `%s': %lld bytes, %lld inodes\n", image, (long long)fsopts->size, (long long)fsopts->inodes); /* create image */ if (ffs_create_image(image, fsopts) == -1) errx(1, "Image file `%s' not created.", image); fsopts->curinode = ROOTINO; /* populate image */ printf("Populating `%s'\n", image); if (! ffs_populate_dir(dir, root, fsopts)) errx(1, "Image file `%s' not populated.", image); bcleanup(); /* update various superblock parameters */ superblock = fsopts->superblock; superblock->fs_fmod = 0; superblock->fs_ffs1_cstotal.cs_ndir = superblock->fs_cstotal.cs_ndir; superblock->fs_ffs1_cstotal.cs_nbfree = superblock->fs_cstotal.cs_nbfree; superblock->fs_ffs1_cstotal.cs_nifree = superblock->fs_cstotal.cs_nifree; superblock->fs_ffs1_cstotal.cs_nffree = superblock->fs_cstotal.cs_nffree; /* write out superblock; image is now complete */ ffs_write_superblock(fsopts->superblock, fsopts); if (ffs_opts->rdroot == 1) { ffs_opts->lp = ffs_makerdroot(fsopts); ffs_opts->pp = &ffs_opts->lp->d_partitions[0]; } if (ffs_opts->lp != NULL) { struct disklabel *lp = ffs_opts->lp; uint16_t *p, *end, sum = 0; ssize_t n; uint32_t bpg; bpg = superblock->fs_fpg / superblock->fs_frag; while (bpg > UINT16_MAX) bpg >>= 1; ffs_opts->pp->p_cpg = bpg; lp->d_magic = DISKMAGIC; lp->d_magic2 = DISKMAGIC; arc4random_buf(lp->d_uid, sizeof(lp->d_uid)); lp->d_checksum = 0; p = (uint16_t *)lp; end = (uint16_t *)&lp->d_partitions[lp->d_npartitions]; while (p < end) sum ^= *p++; lp->d_checksum = sum; n = pwrite(fsopts->fd, lp, sizeof(struct disklabel), fsopts->offset + LABELSECTOR * DEV_BSIZE + LABELOFFSET); if (n == -1) err(1, "failed to write disklabel"); else if (n < sizeof(struct disklabel)) errx(1, "failed to write disklabel: short write"); } if (close(fsopts->fd) == -1) err(1, "Closing `%s'", image); fsopts->fd = -1; printf("Image `%s' complete\n", image); } /* end of public functions */ static void ffs_validate(const char *dir, fsnode *root, fsinfo_t *fsopts) { ffs_opt_t *ffs_opts = fsopts->fs_specific; struct disklabel *lp = ffs_opts->lp; struct partition *pp = NULL; int32_t ncg = 1; int i; assert(dir != NULL); assert(root != NULL); assert(fsopts != NULL); assert(ffs_opts != NULL); if (lp != NULL && ffs_opts->rdroot == 1) errx(1, "rdroot and disklabel are mutually exclusive"); if (lp != NULL) { for (i = 0; i < lp->d_npartitions; i++) { pp = &lp->d_partitions[i]; if (pp->p_fstype == FS_BSDFFS && pp->p_offset * lp->d_secsize == fsopts->offset) { break; } } if (i == lp->d_npartitions) errx(1, "no matching partition found in the disklabel"); ffs_opts->pp = pp; if (pp->p_fragblock == 0) errx(1, "fragment size missing in disktab"); if (fsopts->freeblocks != 0 || fsopts->freeblockpc != 0 || fsopts->freefiles != 0 || fsopts->freefilepc != 0 || fsopts->minsize != 0 || fsopts->maxsize != 0 || fsopts->sectorsize != -1 || fsopts->size != 0) errx(1, "-bfMmSs and disklabel are mutually exclusive"); if (ffs_opts->fsize != -1 || ffs_opts->bsize != -1) errx(1, "b/fsize and disklabel are mutually exclusive"); fsopts->sectorsize = lp->d_secsize; fsopts->minsize = fsopts->maxsize = DL_GETPSIZE(pp) * lp->d_secsize; ffs_opts->fsize = DISKLABELV1_FFS_FSIZE(pp->p_fragblock); ffs_opts->bsize = DISKLABELV1_FFS_BSIZE(pp->p_fragblock); } else if (ffs_opts->rdroot == 1) { if (fsopts->freeblocks != 0 || fsopts->freeblockpc != 0 || fsopts->freefiles != 0 || fsopts->freefilepc != 0 || fsopts->offset != 0 || fsopts->sectorsize != -1 || fsopts->minsize != fsopts->maxsize) errx(1, "rdroot and -bfMmOS are mutually exclusive"); if (fsopts->minsize == 0 || fsopts->maxsize == 0) errx(1, "rdroot requires -s"); if (ffs_opts->minfree != 0) errx(1, "rdroot requires minfree=0"); if (ffs_opts->fsize == -1 || ffs_opts->bsize == -1 || ffs_opts->density == -1) errx(1, "rdroot requires bsize, fsize and density"); fsopts->sectorsize = DEV_BSIZE; } /* set FFS defaults */ if (fsopts->sectorsize == -1) fsopts->sectorsize = DFL_SECSIZE; if (ffs_opts->fsize == -1) ffs_opts->fsize = MAXIMUM(DFL_FRAGSIZE, fsopts->sectorsize); if (ffs_opts->bsize == -1) ffs_opts->bsize = MINIMUM(DFL_BLKSIZE, 8 * ffs_opts->fsize); /* fsopts->density is set below */ /* XXX ondisk32 */ if (ffs_opts->maxbpg == -1) ffs_opts->maxbpg = ffs_opts->bsize / sizeof(int32_t); /* calculate size of tree */ ffs_size_dir(root, fsopts); fsopts->inodes += ROOTINO; /* include first two inodes */ /* add requested slop */ fsopts->size += fsopts->freeblocks; fsopts->inodes += fsopts->freefiles; if (fsopts->freefilepc > 0) fsopts->inodes = fsopts->inodes * (100 + fsopts->freefilepc) / 100; if (fsopts->freeblockpc > 0) fsopts->size = fsopts->size * (100 + fsopts->freeblockpc) / 100; /* add space needed for superblocks */ /* * The old SBOFF (SBLOCK_UFS1) is used here because makefs is * typically used for small filesystems where space matters. * XXX make this an option. */ fsopts->size += (SBLOCK_UFS1 + SBLOCKSIZE) * ncg; /* add space needed to store inodes, x3 for blockmaps, etc */ if (ffs_opts->version == 1) fsopts->size += ncg * sizeof(struct ufs1_dinode) * roundup(fsopts->inodes / ncg, ffs_opts->bsize / sizeof(struct ufs1_dinode)); else fsopts->size += ncg * sizeof(struct ufs2_dinode) * roundup(fsopts->inodes / ncg, ffs_opts->bsize / sizeof(struct ufs2_dinode)); /* add minfree */ if (ffs_opts->minfree > 0) fsopts->size = fsopts->size * (100 + ffs_opts->minfree) / 100; /* * XXX any other fs slop to add, such as csum's, bitmaps, etc ?? */ if (fsopts->size < fsopts->minsize) /* ensure meets minimum size */ fsopts->size = fsopts->minsize; /* round up to the next block */ fsopts->size = roundup(fsopts->size, ffs_opts->bsize); /* calculate density if necessary */ if (ffs_opts->density == -1) ffs_opts->density = fsopts->size / fsopts->inodes + 1; /* now check calculated sizes vs requested sizes */ if (fsopts->maxsize > 0 && fsopts->size > fsopts->maxsize) { errx(1, "`%s' size of %lld is larger than the maxsize of %lld.", dir, (long long)fsopts->size, (long long)fsopts->maxsize); } } static int ffs_create_image(const char *image, fsinfo_t *fsopts) { struct fs *fs; char *buf; int i, bufsize; off_t bufrem; time_t tstamp; int oflags = O_RDWR | O_CREAT; assert (image != NULL); assert (fsopts != NULL); /* create image */ if (fsopts->offset == 0) oflags |= O_TRUNC; if ((fsopts->fd = open(image, oflags, 0666)) == -1) { warn("Can't open `%s' for writing", image); return (-1); } /* zero image */ bufsize = 8192; bufrem = fsopts->size; if (fsopts->offset != 0) if (lseek(fsopts->fd, fsopts->offset, SEEK_SET) == -1) { warn("can't seek"); return -1; } if (bufrem > 0) buf = ecalloc(1, bufsize); while (bufrem > 0) { i = write(fsopts->fd, buf, MINIMUM(bufsize, bufrem)); if (i == -1) { warn("zeroing image, %lld bytes to go", (long long)bufrem); free(buf); return (-1); } bufrem -= i; } free(buf); /* make the file system */ if (Tflag) { tstamp = stampts; srandom_deterministic(stampts); } else tstamp = start_time.tv_sec; fs = ffs_mkfs(image, fsopts, tstamp); fsopts->superblock = (void *)fs; if ((off_t)(fs->fs_cstotal.cs_nifree + ROOTINO) < fsopts->inodes) { warnx( "Image file `%s' has %lld free inodes; %lld are required.", image, (long long)(fs->fs_cstotal.cs_nifree + ROOTINO), (long long)fsopts->inodes); return (-1); } return (fsopts->fd); } static void ffs_size_dir(fsnode *root, fsinfo_t *fsopts) { struct direct tmpdir; fsnode * node; int curdirsize, this; ffs_opt_t *ffs_opts = fsopts->fs_specific; /* node may be NULL (empty directory) */ assert(fsopts != NULL); assert(ffs_opts != NULL); #define ADDDIRENT(e) do { \ tmpdir.d_namlen = strlen((e)); \ this = DIRSIZ(NEWDIRFMT, &tmpdir); \ if (this + curdirsize > roundup(curdirsize, DIRBLKSIZ)) \ curdirsize = roundup(curdirsize, DIRBLKSIZ); \ curdirsize += this; \ } while (0); /* * XXX this needs to take into account extra space consumed * by indirect blocks, etc. */ #define ADDSIZE(x) do { \ fsopts->size += roundup((x), ffs_opts->fsize); \ } while (0); curdirsize = 0; for (node = root; node != NULL; node = node->next) { ADDDIRENT(node->name); if (node == root) { /* we're at "." */ assert(strcmp(node->name, ".") == 0); ADDDIRENT(".."); } else if ((node->inode->flags & FI_SIZED) == 0) { /* don't count duplicate names */ node->inode->flags |= FI_SIZED; fsopts->inodes++; if (node->type == S_IFREG) ADDSIZE(node->inode->st.st_size); if (node->type == S_IFLNK) { size_t slen; slen = strlen(node->symlink) + 1; if (slen >= (ffs_opts->version == 1 ? MAXSYMLINKLEN_UFS1 : MAXSYMLINKLEN_UFS2)) ADDSIZE(slen); } } if (node->type == S_IFDIR) ffs_size_dir(node->child, fsopts); } ADDSIZE(curdirsize); } static void * ffs_build_dinode1(struct ufs1_dinode *dinp, dirbuf_t *dbufp, fsnode *cur, fsnode *root, fsinfo_t *fsopts) { size_t slen; void *membuf; memset(dinp, 0, sizeof(*dinp)); dinp->di_mode = cur->inode->st.st_mode; dinp->di_nlink = cur->inode->nlink; dinp->di_size = cur->inode->st.st_size; dinp->di_flags = cur->inode->st.st_flags; dinp->di_gen = cur->inode->st.st_gen; dinp->di_uid = cur->inode->st.st_uid; dinp->di_gid = cur->inode->st.st_gid; dinp->di_atime = cur->inode->st.st_atime; dinp->di_mtime = cur->inode->st.st_mtime; dinp->di_ctime = cur->inode->st.st_ctime; dinp->di_atimensec = cur->inode->st.st_atimensec; dinp->di_mtimensec = cur->inode->st.st_mtimensec; dinp->di_ctimensec = cur->inode->st.st_ctimensec; /* not set: di_db, di_ib, di_blocks, di_spare */ membuf = NULL; if (cur == root) { /* "."; write dirbuf */ membuf = dbufp->buf; dinp->di_size = dbufp->size; } else if (S_ISBLK(cur->type) || S_ISCHR(cur->type)) { dinp->di_size = 0; /* a device */ dinp->di_rdev = cur->inode->st.st_rdev; } else if (S_ISLNK(cur->type)) { /* symlink */ slen = strlen(cur->symlink); if (slen < MAXSYMLINKLEN_UFS1) { /* short link */ memcpy(dinp->di_db, cur->symlink, slen); } else membuf = cur->symlink; dinp->di_size = slen; } return membuf; } static void * ffs_build_dinode2(struct ufs2_dinode *dinp, dirbuf_t *dbufp, fsnode *cur, fsnode *root, fsinfo_t *fsopts) { size_t slen; void *membuf; memset(dinp, 0, sizeof(*dinp)); dinp->di_mode = cur->inode->st.st_mode; dinp->di_nlink = cur->inode->nlink; dinp->di_size = cur->inode->st.st_size; dinp->di_flags = cur->inode->st.st_flags; dinp->di_gen = cur->inode->st.st_gen; dinp->di_uid = cur->inode->st.st_uid; dinp->di_gid = cur->inode->st.st_gid; dinp->di_atime = cur->inode->st.st_atime; dinp->di_mtime = cur->inode->st.st_mtime; dinp->di_ctime = cur->inode->st.st_ctime; dinp->di_atimensec = cur->inode->st.st_atimensec; dinp->di_mtimensec = cur->inode->st.st_mtimensec; dinp->di_ctimensec = cur->inode->st.st_ctimensec; /* not set: di_db, di_ib, di_blocks, di_spare */ membuf = NULL; if (cur == root) { /* "."; write dirbuf */ membuf = dbufp->buf; dinp->di_size = dbufp->size; } else if (S_ISBLK(cur->type) || S_ISCHR(cur->type)) { dinp->di_size = 0; /* a device */ dinp->di_rdev = cur->inode->st.st_rdev; } else if (S_ISLNK(cur->type)) { /* symlink */ slen = strlen(cur->symlink); if (slen < MAXSYMLINKLEN_UFS2) { /* short link */ memcpy(dinp->di_db, cur->symlink, slen); } else membuf = cur->symlink; dinp->di_size = slen; } return membuf; } static int ffs_populate_dir(const char *dir, fsnode *root, fsinfo_t *fsopts) { fsnode *cur; dirbuf_t dirbuf; union dinode din; void *membuf; char path[PATH_MAX + 1]; ffs_opt_t *ffs_opts = fsopts->fs_specific; assert(dir != NULL); assert(root != NULL); assert(fsopts != NULL); assert(ffs_opts != NULL); (void)memset(&dirbuf, 0, sizeof(dirbuf)); /* * pass 1: allocate inode numbers, build directory `file' */ for (cur = root; cur != NULL; cur = cur->next) { if ((cur->inode->flags & FI_ALLOCATED) == 0) { cur->inode->flags |= FI_ALLOCATED; if (cur == root && cur->parent != NULL) cur->inode->ino = cur->parent->inode->ino; else { cur->inode->ino = fsopts->curinode; fsopts->curinode++; } } ffs_make_dirbuf(&dirbuf, cur->name, cur); if (cur == root) { /* we're at "."; add ".." */ ffs_make_dirbuf(&dirbuf, "..", cur->parent == NULL ? cur : cur->parent->first); root->inode->nlink++; /* count my parent's link */ } else if (cur->child != NULL) root->inode->nlink++; /* count my child's link */ /* * XXX possibly write file and long symlinks here, * ensuring that blocks get written before inodes? * otoh, this isn't a real filesystem, so who * cares about ordering? :-) */ } /* * pass 2: write out dirbuf, then non-directories at this level */ for (cur = root; cur != NULL; cur = cur->next) { if (cur->inode->flags & FI_WRITTEN) continue; /* skip hard-linked entries */ cur->inode->flags |= FI_WRITTEN; if ((size_t)snprintf(path, sizeof(path), "%s/%s/%s", cur->root, cur->path, cur->name) >= sizeof(path)) errx(1, "Pathname too long."); if (cur->child != NULL) continue; /* child creates own inode */ /* build on-disk inode */ if (ffs_opts->version == 1) membuf = ffs_build_dinode1(&din.ffs1_din, &dirbuf, cur, root, fsopts); else membuf = ffs_build_dinode2(&din.ffs2_din, &dirbuf, cur, root, fsopts); if (membuf != NULL) { ffs_write_file(&din, cur->inode->ino, membuf, fsopts); } else if (S_ISREG(cur->type)) { ffs_write_file(&din, cur->inode->ino, path, fsopts); } else { assert (! S_ISDIR(cur->type)); ffs_write_inode(&din, cur->inode->ino, fsopts); } } /* * pass 3: write out sub-directories */ for (cur = root; cur != NULL; cur = cur->next) { if (cur->child == NULL) continue; if ((size_t)snprintf(path, sizeof(path), "%s/%s", dir, cur->name) >= sizeof(path)) errx(1, "Pathname too long."); if (! ffs_populate_dir(path, cur->child, fsopts)) return (0); } /* cleanup */ free(dirbuf.buf); return (1); } static void ffs_write_file(union dinode *din, uint32_t ino, void *buf, fsinfo_t *fsopts) { int isfile, ffd; char *fbuf, *p; off_t bufleft, chunk, offset; ssize_t nread; struct inode in; struct mkfsbuf * bp; ffs_opt_t *ffs_opts = fsopts->fs_specific; struct mkfsvnode vp = { fsopts, NULL }; assert (din != NULL); assert (buf != NULL); assert (fsopts != NULL); assert (ffs_opts != NULL); isfile = S_ISREG(DIP(din, mode)); fbuf = NULL; ffd = -1; p = NULL; in.i_fs = (struct fs *)fsopts->superblock; in.i_devvp = &vp; in.i_number = ino; in.i_size = DIP(din, size); if (ffs_opts->version == 1) memcpy(&in.i_din.ffs1_din, &din->ffs1_din, sizeof(in.i_din.ffs1_din)); else memcpy(&in.i_din.ffs2_din, &din->ffs2_din, sizeof(in.i_din.ffs2_din)); if (DIP(din, size) == 0) goto write_inode_and_leave; /* mmm, cheating */ if (isfile) { fbuf = emalloc(ffs_opts->bsize); if ((ffd = open((char *)buf, O_RDONLY)) == -1) { warn("Can't open `%s' for reading", (char *)buf); goto leave_ffs_write_file; } } else { p = buf; } chunk = 0; for (bufleft = DIP(din, size); bufleft > 0; bufleft -= chunk) { chunk = MINIMUM(bufleft, ffs_opts->bsize); if (!isfile) ; else if ((nread = read(ffd, fbuf, chunk)) == -1) err(1, "Reading `%s', %lld bytes to go", (char *)buf, (long long)bufleft); else if (nread != chunk) errx(1, "Reading `%s', %lld bytes to go, " "read %zd bytes, expected %ju bytes, does " "metalog size= attribute mismatch source size?", (char *)buf, (long long)bufleft, nread, (uintmax_t)chunk); else p = fbuf; offset = DIP(din, size) - bufleft; /* * XXX if holey support is desired, do the check here * * XXX might need to write out last bit in fragroundup * sized chunk. however, ffs_balloc() handles this for us */ errno = ffs_balloc(&in, offset, chunk, &bp); bad_ffs_write_file: if (errno != 0) err(1, "Writing inode %d (%s), bytes %lld + %lld", ino, isfile ? (char *)buf : inode_type(DIP(din, mode) & S_IFMT), (long long)offset, (long long)chunk); memcpy(bp->b_data, p, chunk); errno = bwrite(bp); if (errno != 0) goto bad_ffs_write_file; if (!isfile) p += chunk; } write_inode_and_leave: ffs_write_inode(&in.i_din, in.i_number, fsopts); leave_ffs_write_file: free(fbuf); if (ffd != -1) close(ffd); } static void ffs_make_dirbuf(dirbuf_t *dbuf, const char *name, fsnode *node) { struct direct de, *dp; uint16_t llen; u_char *newbuf; assert (dbuf != NULL); assert (name != NULL); assert (node != NULL); /* create direct entry */ (void)memset(&de, 0, sizeof(de)); de.d_ino = node->inode->ino; de.d_type = IFTODT(node->type); de.d_namlen = (uint8_t)strlen(name); strlcpy(de.d_name, name, sizeof de.d_name); de.d_reclen = DIRSIZ(NEWDIRFMT, &de); dp = (struct direct *)(dbuf->buf + dbuf->cur); llen = 0; if (dp != NULL) llen = DIRSIZ(NEWDIRFMT, dp); if (de.d_reclen + dbuf->cur + llen > roundup(dbuf->size, DIRBLKSIZ)) { newbuf = erealloc(dbuf->buf, dbuf->size + DIRBLKSIZ); dbuf->buf = newbuf; dbuf->size += DIRBLKSIZ; memset(dbuf->buf + dbuf->size - DIRBLKSIZ, 0, DIRBLKSIZ); dbuf->cur = dbuf->size - DIRBLKSIZ; } else if (dp) { /* shrink end of previous */ dp->d_reclen = llen; dbuf->cur += llen; } dp = (struct direct *)(dbuf->buf + dbuf->cur); memcpy(dp, &de, de.d_reclen); dp->d_reclen = dbuf->size - dbuf->cur; } /* * cribbed from sys/ufs/ffs/ffs_alloc.c */ static void ffs_write_inode(union dinode *dp, uint32_t ino, const fsinfo_t *fsopts) { char *buf; struct ufs1_dinode *dp1; struct ufs2_dinode *dp2, *dip; struct cg *cgp; struct fs *fs; int cg, cgino, i; daddr_t d; char sbbuf[FFS_MAXBSIZE]; uint32_t initediblk; ffs_opt_t *ffs_opts = fsopts->fs_specific; assert (dp != NULL); assert (ino > 0); assert (fsopts != NULL); assert (ffs_opts != NULL); fs = (struct fs *)fsopts->superblock; cg = ino_to_cg(fs, ino); cgino = ino % fs->fs_ipg; ffs_rdfs(fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, &sbbuf, fsopts); cgp = (struct cg *)sbbuf; if (!cg_chkmagic(cgp)) errx(1, "ffs_write_inode: cg %d: bad magic number", cg); assert (isclr(cg_inosused(cgp), cgino)); buf = emalloc(fs->fs_bsize); dp1 = (struct ufs1_dinode *)buf; dp2 = (struct ufs2_dinode *)buf; if (fs->fs_cstotal.cs_nifree == 0) errx(1, "ffs_write_inode: fs out of inodes for ino %u", ino); if (fs->fs_cs(fs, cg).cs_nifree == 0) errx(1, "ffs_write_inode: cg %d out of inodes for ino %u", cg, ino); setbit(cg_inosused(cgp), cgino); cgp->cg_cs.cs_nifree -= 1; fs->fs_cstotal.cs_nifree--; fs->fs_cs(fs, cg).cs_nifree--; if (S_ISDIR(DIP(dp, mode))) { cgp->cg_cs.cs_ndir += 1; fs->fs_cstotal.cs_ndir++; fs->fs_cs(fs, cg).cs_ndir++; } /* * Initialize inode blocks on the fly for UFS2. */ initediblk = cgp->cg_initediblk; if (ffs_opts->version == 2 && (uint32_t)(cgino + INOPB(fs)) > initediblk && initediblk < cgp->cg_ffs2_niblk) { memset(buf, 0, fs->fs_bsize); dip = (struct ufs2_dinode *)buf; for (i = 0; i < INOPB(fs); i++) { dip->di_gen = random() / 2 + 1; dip++; } ffs_wtfs(fsbtodb(fs, ino_to_fsba(fs, cg * fs->fs_ipg + initediblk)), fs->fs_bsize, buf, fsopts); initediblk += INOPB(fs); cgp->cg_initediblk = initediblk; } ffs_wtfs(fsbtodb(fs, cgtod(fs, cg)), (int)fs->fs_cgsize, &sbbuf, fsopts); /* now write inode */ d = fsbtodb(fs, ino_to_fsba(fs, ino)); ffs_rdfs(d, fs->fs_bsize, buf, fsopts); if (ffs_opts->version == 1) dp1[ino_to_fsbo(fs, ino)] = dp->ffs1_din; else dp2[ino_to_fsbo(fs, ino)] = dp->ffs2_din; ffs_wtfs(d, fs->fs_bsize, buf, fsopts); free(buf); }