diff --git a/sys/ufs/ffs/ffs_subr.c b/sys/ufs/ffs/ffs_subr.c index 60d90aac5bcc..09f03458e753 100644 --- a/sys/ufs/ffs/ffs_subr.c +++ b/sys/ufs/ffs/ffs_subr.c @@ -1,637 +1,639 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * 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_subr.c 8.5 (Berkeley) 3/21/95 */ #include __FBSDID("$FreeBSD$"); #include #ifndef _KERNEL #include #include #include #include #include #include #include uint32_t calculate_crc32c(uint32_t, const void *, size_t); uint32_t ffs_calc_sbhash(struct fs *); struct malloc_type; #define UFS_MALLOC(size, type, flags) malloc(size) #define UFS_FREE(ptr, type) free(ptr) #else /* _KERNEL */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define UFS_MALLOC(size, type, flags) malloc(size, type, flags) #define UFS_FREE(ptr, type) free(ptr, type) #endif /* _KERNEL */ /* * Verify an inode check-hash. */ int ffs_verify_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip) { uint32_t ckhash, save_ckhash; /* * Return success if unallocated or we are not doing inode check-hash. */ if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0) return (0); /* * Exclude di_ckhash from the crc32 calculation, e.g., always use * a check-hash value of zero when calculating the check-hash. */ save_ckhash = dip->di_ckhash; dip->di_ckhash = 0; ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip)); dip->di_ckhash = save_ckhash; if (save_ckhash == ckhash) return (0); return (EINVAL); } /* * Update an inode check-hash. */ void ffs_update_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip) { if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0) return; /* * Exclude old di_ckhash from the crc32 calculation, e.g., always use * a check-hash value of zero when calculating the new check-hash. */ dip->di_ckhash = 0; dip->di_ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip)); } /* * These are the low-level functions that actually read and write * the superblock and its associated data. */ static off_t sblock_try[] = SBLOCKSEARCH; static int readsuper(void *, struct fs **, off_t, int, int, int (*)(void *, off_t, void **, int)); /* * Read a superblock from the devfd device. * * If an alternate superblock is specified, it is read. Otherwise the * set of locations given in the SBLOCKSEARCH list is searched for a * superblock. Memory is allocated for the superblock by the readfunc and * is returned. If filltype is non-NULL, additional memory is allocated * of type filltype and filled in with the superblock summary information. * All memory is freed when any error is returned. * * If a superblock is found, zero is returned. Otherwise one of the * following error values is returned: * EIO: non-existent or truncated superblock. * EIO: error reading summary information. * ENOENT: no usable known superblock found. * ENOSPC: failed to allocate space for the superblock. * EINVAL: The previous newfs operation on this volume did not complete. * The administrator must complete newfs before using this volume. */ int ffs_sbget(void *devfd, struct fs **fsp, off_t altsblock, struct malloc_type *filltype, int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) { struct fs *fs; struct fs_summary_info *fs_si; int i, error, size, blks; uint8_t *space; int32_t *lp; - int chkhash; char *buf; fs = NULL; *fsp = NULL; if (altsblock >= 0) { if ((error = readsuper(devfd, &fs, altsblock, 1, 0, readfunc)) != 0) { if (fs != NULL) UFS_FREE(fs, filltype); return (error); } } else { - chkhash = 1; - if (altsblock == STDSB_NOHASHFAIL) - chkhash = 0; for (i = 0; sblock_try[i] != -1; i++) { if ((error = readsuper(devfd, &fs, sblock_try[i], 0, - chkhash, readfunc)) == 0) + altsblock, readfunc)) == 0) break; if (fs != NULL) { UFS_FREE(fs, filltype); fs = NULL; } if (error == ENOENT) continue; return (error); } if (sblock_try[i] == -1) return (ENOENT); } /* * Read in the superblock summary information. */ size = fs->fs_cssize; blks = howmany(size, fs->fs_fsize); if (fs->fs_contigsumsize > 0) size += fs->fs_ncg * sizeof(int32_t); size += fs->fs_ncg * sizeof(u_int8_t); /* When running in libufs or libsa, UFS_MALLOC may fail */ if ((fs_si = UFS_MALLOC(sizeof(*fs_si), filltype, M_WAITOK)) == NULL) { UFS_FREE(fs, filltype); return (ENOSPC); } bzero(fs_si, sizeof(*fs_si)); fs->fs_si = fs_si; if ((space = UFS_MALLOC(size, filltype, M_WAITOK)) == NULL) { UFS_FREE(fs->fs_si, filltype); UFS_FREE(fs, filltype); return (ENOSPC); } fs->fs_csp = (struct csum *)space; for (i = 0; i < blks; i += fs->fs_frag) { size = fs->fs_bsize; if (i + fs->fs_frag > blks) size = (blks - i) * fs->fs_fsize; buf = NULL; error = (*readfunc)(devfd, dbtob(fsbtodb(fs, fs->fs_csaddr + i)), (void **)&buf, size); if (error) { if (buf != NULL) UFS_FREE(buf, filltype); UFS_FREE(fs->fs_csp, filltype); UFS_FREE(fs->fs_si, filltype); UFS_FREE(fs, filltype); return (error); } memcpy(space, buf, size); UFS_FREE(buf, filltype); space += size; } if (fs->fs_contigsumsize > 0) { fs->fs_maxcluster = lp = (int32_t *)space; for (i = 0; i < fs->fs_ncg; i++) *lp++ = fs->fs_contigsumsize; space = (uint8_t *)lp; } size = fs->fs_ncg * sizeof(u_int8_t); fs->fs_contigdirs = (u_int8_t *)space; bzero(fs->fs_contigdirs, size); *fsp = fs; return (0); } /* * Try to read a superblock from the location specified by sblockloc. * Return zero on success or an errno on failure. */ static int readsuper(void *devfd, struct fs **fsp, off_t sblockloc, int isaltsblk, int chkhash, int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) { struct fs *fs; int error, res; uint32_t ckhash; error = (*readfunc)(devfd, sblockloc, (void **)fsp, SBLOCKSIZE); if (error != 0) return (error); fs = *fsp; if (fs->fs_magic == FS_BAD_MAGIC) return (EINVAL); if (((fs->fs_magic == FS_UFS1_MAGIC && (isaltsblk || sblockloc <= SBLOCK_UFS1)) || (fs->fs_magic == FS_UFS2_MAGIC && (isaltsblk || sblockloc == fs->fs_sblockloc))) && fs->fs_ncg >= 1 && fs->fs_bsize >= MINBSIZE && fs->fs_bsize <= MAXBSIZE && fs->fs_bsize >= roundup(sizeof(struct fs), DEV_BSIZE) && fs->fs_sbsize <= SBLOCKSIZE) { /* * If the filesystem has been run on a kernel without * metadata check hashes, disable them. */ if ((fs->fs_flags & FS_METACKHASH) == 0) fs->fs_metackhash = 0; /* * Clear any check-hashes that are not maintained * by this kernel. Also clear any unsupported flags. */ fs->fs_metackhash &= CK_SUPPORTED; fs->fs_flags &= FS_SUPPORTED; if (fs->fs_ckhash != (ckhash = ffs_calc_sbhash(fs))) { + if (chkhash == STDSB_NOMSG) + return (EINTEGRITY); + if (chkhash == STDSB_NOHASHFAIL_NOMSG) { + fs->fs_flags |= FS_NEEDSFSCK; + fs->fs_fmod = 1; + return (0); + } #ifdef _KERNEL res = uprintf("Superblock check-hash failed: recorded " "check-hash 0x%x != computed check-hash 0x%x%s\n", fs->fs_ckhash, ckhash, chkhash == 0 ? " (Ignored)" : ""); #else res = 0; #endif /* * Print check-hash failure if no controlling terminal * in kernel or always if in user-mode (libufs). */ if (res == 0) printf("Superblock check-hash failed: recorded " "check-hash 0x%x != computed check-hash " "0x%x%s\n", fs->fs_ckhash, ckhash, chkhash == 0 ? " (Ignored)" : ""); - if (chkhash == 0) { - fs->fs_flags |= FS_NEEDSFSCK; - fs->fs_fmod = 1; - return (0); - } - fs->fs_fmod = 0; - return (EINTEGRITY); + if (chkhash == STDSB) + return (EINTEGRITY); + /* chkhash == STDSB_NOHASHFAIL */ + fs->fs_flags |= FS_NEEDSFSCK; + fs->fs_fmod = 1; + return (0); } /* Have to set for old filesystems that predate this field */ fs->fs_sblockactualloc = sblockloc; /* Not yet any summary information */ fs->fs_si = NULL; return (0); } return (ENOENT); } /* * Write a superblock to the devfd device from the memory pointed to by fs. * Write out the superblock summary information if it is present. * * If the write is successful, zero is returned. Otherwise one of the * following error values is returned: * EIO: failed to write superblock. * EIO: failed to write superblock summary information. */ int ffs_sbput(void *devfd, struct fs *fs, off_t loc, int (*writefunc)(void *devfd, off_t loc, void *buf, int size)) { int i, error, blks, size; uint8_t *space; /* * If there is summary information, write it first, so if there * is an error, the superblock will not be marked as clean. */ if (fs->fs_si != NULL && fs->fs_csp != NULL) { blks = howmany(fs->fs_cssize, fs->fs_fsize); space = (uint8_t *)fs->fs_csp; for (i = 0; i < blks; i += fs->fs_frag) { size = fs->fs_bsize; if (i + fs->fs_frag > blks) size = (blks - i) * fs->fs_fsize; if ((error = (*writefunc)(devfd, dbtob(fsbtodb(fs, fs->fs_csaddr + i)), space, size)) != 0) return (error); space += size; } } fs->fs_fmod = 0; #ifndef _KERNEL { struct fs_summary_info *fs_si; fs->fs_time = time(NULL); /* Clear the pointers for the duration of writing. */ fs_si = fs->fs_si; fs->fs_si = NULL; fs->fs_ckhash = ffs_calc_sbhash(fs); error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); fs->fs_si = fs_si; } #else /* _KERNEL */ fs->fs_time = time_second; fs->fs_ckhash = ffs_calc_sbhash(fs); error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); #endif /* _KERNEL */ return (error); } /* * Calculate the check-hash for a superblock. */ uint32_t ffs_calc_sbhash(struct fs *fs) { uint32_t ckhash, save_ckhash; /* * A filesystem that was using a superblock ckhash may be moved * to an older kernel that does not support ckhashes. The * older kernel will clear the FS_METACKHASH flag indicating * that it does not update hashes. When the disk is moved back * to a kernel capable of ckhashes it disables them on mount: * * if ((fs->fs_flags & FS_METACKHASH) == 0) * fs->fs_metackhash = 0; * * This leaves (fs->fs_metackhash & CK_SUPERBLOCK) == 0) with an * old stale value in the fs->fs_ckhash field. Thus the need to * just accept what is there. */ if ((fs->fs_metackhash & CK_SUPERBLOCK) == 0) return (fs->fs_ckhash); save_ckhash = fs->fs_ckhash; fs->fs_ckhash = 0; /* * If newly read from disk, the caller is responsible for * verifying that fs->fs_sbsize <= SBLOCKSIZE. */ ckhash = calculate_crc32c(~0L, (void *)fs, fs->fs_sbsize); fs->fs_ckhash = save_ckhash; return (ckhash); } /* * Update the frsum fields to reflect addition or deletion * of some frags. */ void ffs_fragacct(struct fs *fs, int fragmap, int32_t fraglist[], int cnt) { int inblk; int field, subfield; int siz, pos; inblk = (int)(fragtbl[fs->fs_frag][fragmap]) << 1; fragmap <<= 1; for (siz = 1; siz < fs->fs_frag; siz++) { if ((inblk & (1 << (siz + (fs->fs_frag % NBBY)))) == 0) continue; field = around[siz]; subfield = inside[siz]; for (pos = siz; pos <= fs->fs_frag; pos++) { if ((fragmap & field) == subfield) { fraglist[siz] += cnt; pos += siz; field <<= siz; subfield <<= siz; } field <<= 1; subfield <<= 1; } } } /* * block operations * * check if a block is available */ int ffs_isblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) { unsigned char mask; switch ((int)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: #ifdef _KERNEL panic("ffs_isblock"); #endif break; } return (0); } /* * check if a block is free */ int ffs_isfreeblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) { switch ((int)fs->fs_frag) { case 8: return (cp[h] == 0); case 4: return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0); case 2: return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0); case 1: return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0); default: #ifdef _KERNEL panic("ffs_isfreeblock"); #endif break; } return (0); } /* * take a block out of the map */ void ffs_clrblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) { switch ((int)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: #ifdef _KERNEL panic("ffs_clrblock"); #endif break; } } /* * put a block into the map */ void ffs_setblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) { switch ((int)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: #ifdef _KERNEL panic("ffs_setblock"); #endif break; } } /* * Update the cluster map because of an allocation or free. * * Cnt == 1 means free; cnt == -1 means allocating. */ void ffs_clusteracct(struct fs *fs, struct cg *cgp, ufs1_daddr_t blkno, int cnt) { int32_t *sump; int32_t *lp; u_char *freemapp, *mapp; int i, start, end, forw, back, map; u_int bit; if (fs->fs_contigsumsize <= 0) return; freemapp = cg_clustersfree(cgp); sump = cg_clustersum(cgp); /* * Allocate or clear the actual block. */ if (cnt > 0) setbit(freemapp, blkno); else clrbit(freemapp, blkno); /* * Find the size of the cluster going forward. */ start = blkno + 1; end = start + fs->fs_contigsumsize; if (end >= cgp->cg_nclusterblks) end = cgp->cg_nclusterblks; mapp = &freemapp[start / NBBY]; map = *mapp++; bit = 1U << (start % NBBY); for (i = start; i < end; i++) { if ((map & bit) == 0) break; if ((i & (NBBY - 1)) != (NBBY - 1)) { bit <<= 1; } else { map = *mapp++; bit = 1; } } forw = i - start; /* * Find the size of the cluster going backward. */ start = blkno - 1; end = start - fs->fs_contigsumsize; if (end < 0) end = -1; mapp = &freemapp[start / NBBY]; map = *mapp--; bit = 1U << (start % NBBY); for (i = start; i > end; i--) { if ((map & bit) == 0) break; if ((i & (NBBY - 1)) != 0) { bit >>= 1; } else { map = *mapp--; bit = 1U << (NBBY - 1); } } back = start - i; /* * Account for old cluster and the possibly new forward and * back clusters. */ i = back + forw + 1; if (i > fs->fs_contigsumsize) i = fs->fs_contigsumsize; sump[i] += cnt; if (back > 0) sump[back] -= cnt; if (forw > 0) sump[forw] -= cnt; /* * Update cluster summary information. */ lp = &sump[fs->fs_contigsumsize]; for (i = fs->fs_contigsumsize; i > 0; i--) if (*lp-- > 0) break; fs->fs_maxcluster[cgp->cg_cgx] = i; } diff --git a/sys/ufs/ffs/fs.h b/sys/ufs/ffs/fs.h index 00c153b9684d..8c0047f17caf 100644 --- a/sys/ufs/ffs/fs.h +++ b/sys/ufs/ffs/fs.h @@ -1,879 +1,889 @@ /*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1982, 1986, 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. * * @(#)fs.h 8.13 (Berkeley) 3/21/95 * $FreeBSD$ */ #ifndef _UFS_FFS_FS_H_ #define _UFS_FFS_FS_H_ #include #include /* * Each disk drive contains some number of filesystems. * A filesystem consists of a number of cylinder groups. * Each cylinder group has inodes and data. * * A filesystem is described by its super-block, which in turn * describes the cylinder groups. The super-block is critical * data and is replicated in each cylinder group to protect against * catastrophic loss. This is done at `newfs' time and the critical * super-block data does not change, so the copies need not be * referenced further unless disaster strikes. * * For filesystem fs, the offsets of the various blocks of interest * are given in the super block as: * [fs->fs_sblkno] Super-block * [fs->fs_cblkno] Cylinder group block * [fs->fs_iblkno] Inode blocks * [fs->fs_dblkno] Data blocks * The beginning of cylinder group cg in fs, is given by * the ``cgbase(fs, cg)'' macro. * * Depending on the architecture and the media, the superblock may * reside in any one of four places. For tiny media where every block * counts, it is placed at the very front of the partition. Historically, * UFS1 placed it 8K from the front to leave room for the disk label and * a small bootstrap. For UFS2 it got moved to 64K from the front to leave * room for the disk label and a bigger bootstrap, and for really piggy * systems we check at 256K from the front if the first three fail. In * all cases the size of the superblock will be SBLOCKSIZE. All values are * given in byte-offset form, so they do not imply a sector size. The * SBLOCKSEARCH specifies the order in which the locations should be searched. */ #define SBLOCK_FLOPPY 0 #define SBLOCK_UFS1 8192 #define SBLOCK_UFS2 65536 #define SBLOCK_PIGGY 262144 #define SBLOCKSIZE 8192 #define SBLOCKSEARCH \ { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } /* * Request standard superblock location in ffs_sbget(). * * STDSB will fail if the superblock has a check hash and it is wrong. * * STDSB_NOHASHFAIL will note that the check hash is wrong but will * still return the superblock. This is used by the bootstrap code * to give the system a chance to come up so that fsck can be run * to correct the problem. + * + * STDSB_NOMSG is the same as STDSB but the kernel does not print an + * error message. It is used by programs like fsck that want to + * print their own error message. + * + * STDSB_NOHASHFAIL_NOMSG is the same as STDSB_NOHASHFAIL but the kernel + * does not print an error message. It is used by clients like glabel + * that just want to check for possible filesystem types. */ #define STDSB -1 /* Fail if check-hash is bad */ #define STDSB_NOHASHFAIL -2 /* Ignore check-hash failure */ +#define STDSB_NOMSG -3 /* STDSB with no kernel message */ +#define STDSB_NOHASHFAIL_NOMSG -4 /* STDSB_NOHASHFAIL with no message */ /* * Max number of fragments per block. This value is NOT tweakable. */ #define MAXFRAG 8 /* * Addresses stored in inodes are capable of addressing fragments * of `blocks'. File system blocks of at most size MAXBSIZE can * be optionally broken into 2, 4, or 8 pieces, each of which is * addressable; these pieces may be DEV_BSIZE, or some multiple of * a DEV_BSIZE unit. * * Large files consist of exclusively large data blocks. To avoid * undue wasted disk space, the last data block of a small file may be * allocated as only as many fragments of a large block as are * necessary. The filesystem format retains only a single pointer * to such a fragment, which is a piece of a single large block that * has been divided. The size of such a fragment is determinable from * information in the inode, using the ``blksize(fs, ip, lbn)'' macro. * * The filesystem records space availability at the fragment level; * to determine block availability, aligned fragments are examined. */ /* * MINBSIZE is the smallest allowable block size. * In order to insure that it is possible to create files of size * 2^32 with only two levels of indirection, MINBSIZE is set to 4096. * MINBSIZE must be big enough to hold a cylinder group block, * thus changes to (struct cg) must keep its size within MINBSIZE. * Note that super blocks are always of size SBLOCKSIZE, * and that both SBLOCKSIZE and MAXBSIZE must be >= MINBSIZE. */ #define MINBSIZE 4096 /* * The path name on which the filesystem is mounted is maintained * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in * the super block for this name. */ #define MAXMNTLEN 468 /* * The volume name for this filesystem is maintained in fs_volname. * MAXVOLLEN defines the length of the buffer allocated. */ #define MAXVOLLEN 32 /* * There is a 128-byte region in the superblock reserved for in-core * pointers to summary information. Originally this included an array * of pointers to blocks of struct csum; now there are just a few * pointers and the remaining space is padded with fs_ocsp[]. * * NOCSPTRS determines the size of this padding. Historically this * space was used to store pointers to structures that summaried * filesystem usage and layout information. However, these pointers * left various kernel pointers in the superblock which made otherwise * identical superblocks appear to have differences. So, all the * pointers in the superblock were moved to a fs_summary_info structure * reducing the superblock to having only a single pointer to this * structure. When writing the superblock to disk, this pointer is * temporarily NULL'ed out so that the kernel pointer will not appear * in the on-disk copy of the superblock. */ #define NOCSPTRS ((128 / sizeof(void *)) - 1) /* * A summary of contiguous blocks of various sizes is maintained * in each cylinder group. Normally this is set by the initial * value of fs_maxcontig. To conserve space, a maximum summary size * is set by FS_MAXCONTIG. */ #define FS_MAXCONTIG 16 /* * MINFREE gives the minimum acceptable percentage of filesystem * blocks which may be free. If the freelist drops below this level * only the superuser may continue to allocate blocks. This may * be set to 0 if no reserve of free blocks is deemed necessary, * however throughput drops by fifty percent if the filesystem * is run at between 95% and 100% full; thus the minimum default * value of fs_minfree is 5%. However, to get good clustering * performance, 10% is a better choice. hence we use 10% as our * default value. With 10% free space, fragmentation is not a * problem, so we choose to optimize for time. */ #define MINFREE 8 #define DEFAULTOPT FS_OPTTIME /* * Grigoriy Orlov has done some extensive work to fine * tune the layout preferences for directories within a filesystem. * His algorithm can be tuned by adjusting the following parameters * which tell the system the average file size and the average number * of files per directory. These defaults are well selected for typical * filesystems, but may need to be tuned for odd cases like filesystems * being used for squid caches or news spools. */ #define AVFILESIZ 16384 /* expected average file size */ #define AFPDIR 64 /* expected number of files per directory */ /* * The maximum number of snapshot nodes that can be associated * with each filesystem. This limit affects only the number of * snapshot files that can be recorded within the superblock so * that they can be found when the filesystem is mounted. However, * maintaining too many will slow the filesystem performance, so * having this limit is a good idea. */ #define FSMAXSNAP 20 /* * Used to identify special blocks in snapshots: * * BLK_NOCOPY - A block that was unallocated at the time the snapshot * was taken, hence does not need to be copied when written. * BLK_SNAP - A block held by another snapshot that is not needed by this * snapshot. When the other snapshot is freed, the BLK_SNAP entries * are converted to BLK_NOCOPY. These are needed to allow fsck to * identify blocks that are in use by other snapshots (which are * expunged from this snapshot). */ #define BLK_NOCOPY ((ufs2_daddr_t)(1)) #define BLK_SNAP ((ufs2_daddr_t)(2)) /* * Sysctl values for the fast filesystem. */ #define FFS_ADJ_REFCNT 1 /* adjust inode reference count */ #define FFS_ADJ_BLKCNT 2 /* adjust inode used block count */ #define FFS_BLK_FREE 3 /* free range of blocks in map */ #define FFS_DIR_FREE 4 /* free specified dir inodes in map */ #define FFS_FILE_FREE 5 /* free specified file inodes in map */ #define FFS_SET_FLAGS 6 /* set filesystem flags */ #define FFS_ADJ_NDIR 7 /* adjust number of directories */ #define FFS_ADJ_NBFREE 8 /* adjust number of free blocks */ #define FFS_ADJ_NIFREE 9 /* adjust number of free inodes */ #define FFS_ADJ_NFFREE 10 /* adjust number of free frags */ #define FFS_ADJ_NUMCLUSTERS 11 /* adjust number of free clusters */ #define FFS_SET_CWD 12 /* set current directory */ #define FFS_SET_DOTDOT 13 /* set inode number for ".." */ #define FFS_UNLINK 14 /* remove a name in the filesystem */ /* Was FFS_SET_INODE 15 */ /* Was FFS_SET_BUFOUTPUT 16 */ #define FFS_SET_SIZE 17 /* set inode size */ #define FFS_MAXID 17 /* number of valid ffs ids */ /* * Command structure passed in to the filesystem to adjust filesystem values. */ #define FFS_CMD_VERSION 0x19790518 /* version ID */ struct fsck_cmd { int32_t version; /* version of command structure */ int32_t handle; /* reference to filesystem to be changed */ int64_t value; /* inode or block number to be affected */ int64_t size; /* amount or range to be adjusted */ int64_t spare; /* reserved for future use */ }; /* * A recovery structure placed at the end of the boot block area by newfs * that can be used by fsck to search for alternate superblocks. */ struct fsrecovery { int32_t fsr_magic; /* magic number */ int32_t fsr_fsbtodb; /* fsbtodb and dbtofsb shift constant */ int32_t fsr_sblkno; /* offset of super-block in filesys */ int32_t fsr_fpg; /* blocks per group * fs_frag */ u_int32_t fsr_ncg; /* number of cylinder groups */ }; /* * Per cylinder group information; summarized in blocks allocated * from first cylinder group data blocks. These blocks have to be * read in from fs_csaddr (size fs_cssize) in addition to the * super block. */ struct csum { int32_t cs_ndir; /* number of directories */ int32_t cs_nbfree; /* number of free blocks */ int32_t cs_nifree; /* number of free inodes */ int32_t cs_nffree; /* number of free frags */ }; struct csum_total { int64_t cs_ndir; /* number of directories */ int64_t cs_nbfree; /* number of free blocks */ int64_t cs_nifree; /* number of free inodes */ int64_t cs_nffree; /* number of free frags */ int64_t cs_numclusters; /* number of free clusters */ int64_t cs_spare[3]; /* future expansion */ }; /* * Pointers to super block summary information. Placed in a separate * structure so there is just one pointer in the superblock. * * The pointers in this structure are used as follows: * fs_contigdirs references an array that tracks the creation of new * directories * fs_csp references a contiguous array of struct csum for * all cylinder groups * fs_maxcluster references an array of cluster sizes that is computed * as cylinder groups are inspected * fs_active is used when creating snapshots; it points to a bitmap * of cylinder groups for which the free-block bitmap has changed * since the snapshot operation began. */ struct fs_summary_info { uint8_t *si_contigdirs; /* (u) # of contig. allocated dirs */ struct csum *si_csp; /* (u) cg summary info buffer */ int32_t *si_maxcluster; /* (u) max cluster in each cyl group */ u_int *si_active; /* (u) used by snapshots to track fs */ }; #define fs_contigdirs fs_si->si_contigdirs #define fs_csp fs_si->si_csp #define fs_maxcluster fs_si->si_maxcluster #define fs_active fs_si->si_active /* * Super block for an FFS filesystem. */ struct fs { int32_t fs_firstfield; /* historic filesystem linked list, */ int32_t fs_unused_1; /* used for incore super blocks */ int32_t fs_sblkno; /* offset of super-block in filesys */ int32_t fs_cblkno; /* offset of cyl-block in filesys */ int32_t fs_iblkno; /* offset of inode-blocks in filesys */ int32_t fs_dblkno; /* offset of first data after cg */ int32_t fs_old_cgoffset; /* cylinder group offset in cylinder */ int32_t fs_old_cgmask; /* used to calc mod fs_ntrak */ int32_t fs_old_time; /* last time written */ int32_t fs_old_size; /* number of blocks in fs */ int32_t fs_old_dsize; /* number of data blocks in fs */ u_int32_t fs_ncg; /* number of cylinder groups */ int32_t fs_bsize; /* size of basic blocks in fs */ int32_t fs_fsize; /* size of frag blocks in fs */ int32_t fs_frag; /* number of frags in a block in fs */ /* these are configuration parameters */ int32_t fs_minfree; /* minimum percentage of free blocks */ int32_t fs_old_rotdelay; /* num of ms for optimal next block */ int32_t fs_old_rps; /* disk revolutions per second */ /* these fields can be computed from the others */ int32_t fs_bmask; /* ``blkoff'' calc of blk offsets */ int32_t fs_fmask; /* ``fragoff'' calc of frag offsets */ int32_t fs_bshift; /* ``lblkno'' calc of logical blkno */ int32_t fs_fshift; /* ``numfrags'' calc number of frags */ /* these are configuration parameters */ int32_t fs_maxcontig; /* max number of contiguous blks */ int32_t fs_maxbpg; /* max number of blks per cyl group */ /* these fields can be computed from the others */ int32_t fs_fragshift; /* block to frag shift */ int32_t fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ int32_t fs_sbsize; /* actual size of super block */ int32_t fs_spare1[2]; /* old fs_csmask */ /* old fs_csshift */ int32_t fs_nindir; /* value of NINDIR */ u_int32_t fs_inopb; /* value of INOPB */ int32_t fs_old_nspf; /* value of NSPF */ /* yet another configuration parameter */ int32_t fs_optim; /* optimization preference, see below */ int32_t fs_old_npsect; /* # sectors/track including spares */ int32_t fs_old_interleave; /* hardware sector interleave */ int32_t fs_old_trackskew; /* sector 0 skew, per track */ int32_t fs_id[2]; /* unique filesystem id */ /* sizes determined by number of cylinder groups and their sizes */ int32_t fs_old_csaddr; /* blk addr of cyl grp summary area */ int32_t fs_cssize; /* size of cyl grp summary area */ int32_t fs_cgsize; /* cylinder group size */ int32_t fs_spare2; /* old fs_ntrak */ int32_t fs_old_nsect; /* sectors per track */ int32_t fs_old_spc; /* sectors per cylinder */ int32_t fs_old_ncyl; /* cylinders in filesystem */ int32_t fs_old_cpg; /* cylinders per group */ u_int32_t fs_ipg; /* inodes per group */ int32_t fs_fpg; /* blocks per group * fs_frag */ /* this data must be re-computed after crashes */ struct csum fs_old_cstotal; /* cylinder summary information */ /* these fields are cleared at mount time */ int8_t fs_fmod; /* super block modified flag */ int8_t fs_clean; /* filesystem is clean flag */ int8_t fs_ronly; /* mounted read-only flag */ int8_t fs_old_flags; /* old FS_ flags */ u_char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ u_char fs_volname[MAXVOLLEN]; /* volume name */ u_int64_t fs_swuid; /* system-wide uid */ int32_t fs_pad; /* due to alignment of fs_swuid */ /* these fields retain the current block allocation info */ int32_t fs_cgrotor; /* last cg searched */ void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ struct fs_summary_info *fs_si;/* In-core pointer to summary info */ int32_t fs_old_cpc; /* cyl per cycle in postbl */ int32_t fs_maxbsize; /* maximum blocking factor permitted */ int64_t fs_unrefs; /* number of unreferenced inodes */ int64_t fs_providersize; /* size of underlying GEOM provider */ int64_t fs_metaspace; /* size of area reserved for metadata */ int64_t fs_sparecon64[13]; /* old rotation block list head */ int64_t fs_sblockactualloc; /* byte offset of this superblock */ int64_t fs_sblockloc; /* byte offset of standard superblock */ struct csum_total fs_cstotal; /* (u) cylinder summary information */ ufs_time_t fs_time; /* last time written */ int64_t fs_size; /* number of blocks in fs */ int64_t fs_dsize; /* number of data blocks in fs */ ufs2_daddr_t fs_csaddr; /* blk addr of cyl grp summary area */ int64_t fs_pendingblocks; /* (u) blocks being freed */ u_int32_t fs_pendinginodes; /* (u) inodes being freed */ uint32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ u_int32_t fs_avgfilesize; /* expected average file size */ u_int32_t fs_avgfpdir; /* expected # of files per directory */ int32_t fs_save_cgsize; /* save real cg size to use fs_bsize */ ufs_time_t fs_mtime; /* Last mount or fsck time. */ int32_t fs_sujfree; /* SUJ free list */ int32_t fs_sparecon32[21]; /* reserved for future constants */ u_int32_t fs_ckhash; /* if CK_SUPERBLOCK, its check-hash */ u_int32_t fs_metackhash; /* metadata check-hash, see CK_ below */ int32_t fs_flags; /* see FS_ flags below */ int32_t fs_contigsumsize; /* size of cluster summary array */ int32_t fs_maxsymlinklen; /* max length of an internal symlink */ int32_t fs_old_inodefmt; /* format of on-disk inodes */ u_int64_t fs_maxfilesize; /* maximum representable file size */ int64_t fs_qbmask; /* ~fs_bmask for use with 64-bit size */ int64_t fs_qfmask; /* ~fs_fmask for use with 64-bit size */ int32_t fs_state; /* validate fs_clean field */ int32_t fs_old_postblformat; /* format of positional layout tables */ int32_t fs_old_nrpos; /* number of rotational positions */ int32_t fs_spare5[2]; /* old fs_postbloff */ /* old fs_rotbloff */ int32_t fs_magic; /* magic number */ }; /* Sanity checking. */ #ifdef CTASSERT CTASSERT(sizeof(struct fs) == 1376); #endif /* * Filesystem identification */ #define FS_UFS1_MAGIC 0x011954 /* UFS1 fast filesystem magic number */ #define FS_UFS2_MAGIC 0x19540119 /* UFS2 fast filesystem magic number */ #define FS_BAD_MAGIC 0x19960408 /* UFS incomplete newfs magic number */ #define FS_42INODEFMT -1 /* 4.2BSD inode format */ #define FS_44INODEFMT 2 /* 4.4BSD inode format */ /* * Preference for optimization. */ #define FS_OPTTIME 0 /* minimize allocation time */ #define FS_OPTSPACE 1 /* minimize disk fragmentation */ /* * Filesystem flags. * * The FS_UNCLEAN flag is set by the kernel when the filesystem was * mounted with fs_clean set to zero. The FS_DOSOFTDEP flag indicates * that the filesystem should be managed by the soft updates code. * Note that the FS_NEEDSFSCK flag is set and cleared by the fsck * utility. It is set when background fsck finds an unexpected * inconsistency which requires a traditional foreground fsck to be * run. Such inconsistencies should only be found after an uncorrectable * disk error. The FS_NEEDSFSCK can also be set when a mounted filesystem * discovers an internal inconsistency such as freeing a freed inode. * A foreground fsck will clear the FS_NEEDSFSCK flag when it has * successfully cleaned up the filesystem. The kernel uses this * flag to enforce that inconsistent filesystems be mounted read-only. * * The FS_METACKHASH flag when set indicates that the kernel maintains * one or more check hashes. The actual set of supported check hashes * is stored in the fs_metackhash field. Kernels that do not support * check hashes clear the FS_METACKHASH flag to indicate that the * check hashes need to be rebuilt (by fsck) before they can be used. * * When a filesystem is mounted, any flags not included in FS_SUPPORTED * are cleared. This lets newer features know that the filesystem has * been run on an older version of the filesystem and thus that data * structures associated with those features are out-of-date and need * to be rebuilt. * * FS_ACLS indicates that POSIX.1e ACLs are administratively enabled * for the file system, so they should be loaded from extended attributes, * observed for access control purposes, and be administered by object * owners. FS_NFS4ACLS indicates that NFSv4 ACLs are administratively * enabled. This flag is mutually exclusive with FS_ACLS. FS_MULTILABEL * indicates that the TrustedBSD MAC Framework should attempt to back MAC * labels into extended attributes on the file system rather than maintain * a single mount label for all objects. */ #define FS_UNCLEAN 0x00000001 /* filesystem not clean at mount */ #define FS_DOSOFTDEP 0x00000002 /* filesystem using soft dependencies */ #define FS_NEEDSFSCK 0x00000004 /* filesystem needs sync fsck before mount */ #define FS_SUJ 0x00000008 /* Filesystem using softupdate journal */ #define FS_ACLS 0x00000010 /* file system has POSIX.1e ACLs enabled */ #define FS_MULTILABEL 0x00000020 /* file system is MAC multi-label */ #define FS_GJOURNAL 0x00000040 /* gjournaled file system */ #define FS_FLAGS_UPDATED 0x0000080 /* flags have been moved to new location */ #define FS_NFS4ACLS 0x00000100 /* file system has NFSv4 ACLs enabled */ #define FS_METACKHASH 0x00000200 /* kernel supports metadata check hashes */ #define FS_TRIM 0x00000400 /* issue BIO_DELETE for deleted blocks */ #define FS_SUPPORTED 0x00FFFFFF /* supported flags, others cleared at mount*/ /* * Things that we may someday support, but currently do not. * These flags are all cleared so we know if we ran on a kernel * that does not support them. */ #define FS_INDEXDIRS 0x01000000 /* kernel supports indexed directories */ #define FS_VARBLKSIZE 0x02000000 /* kernel supports variable block sizes */ #define FS_COOLOPT1 0x04000000 /* kernel supports cool option 1 */ #define FS_COOLOPT2 0x08000000 /* kernel supports cool option 2 */ #define FS_COOLOPT3 0x10000000 /* kernel supports cool option 3 */ #define FS_COOLOPT4 0x20000000 /* kernel supports cool option 4 */ #define FS_COOLOPT5 0x40000000 /* kernel supports cool option 5 */ #define FS_COOLOPT6 0x80000000 /* kernel supports cool option 6 */ /* * The fs_metackhash field indicates the types of metadata check-hash * that are maintained for a filesystem. Not all filesystems check-hash * all metadata. */ #define CK_SUPERBLOCK 0x0001 /* the superblock */ #define CK_CYLGRP 0x0002 /* the cylinder groups */ #define CK_INODE 0x0004 /* inodes */ #define CK_INDIR 0x0008 /* indirect blocks */ #define CK_DIR 0x0010 /* directory contents */ #define CK_SUPPORTED 0x0007 /* supported flags, others cleared at mount */ /* * The BX_FSPRIV buffer b_xflags are used to track types of data in buffers. */ #define BX_SUPERBLOCK 0x00010000 /* superblock */ #define BX_CYLGRP 0x00020000 /* cylinder groups */ #define BX_INODE 0x00040000 /* inodes */ #define BX_INDIR 0x00080000 /* indirect blocks */ #define BX_DIR 0x00100000 /* directory contents */ #define PRINT_UFS_BUF_XFLAGS "\20\25dir\24indir\23inode\22cylgrp\21superblock" /* * Macros to access bits in the fs_active array. */ #define ACTIVECGNUM(fs, cg) ((fs)->fs_active[(cg) / (NBBY * sizeof(int))]) #define ACTIVECGOFF(cg) (1 << ((cg) % (NBBY * sizeof(int)))) #define ACTIVESET(fs, cg) do { \ if ((fs)->fs_active) \ ACTIVECGNUM((fs), (cg)) |= ACTIVECGOFF((cg)); \ } while (0) #define ACTIVECLEAR(fs, cg) do { \ if ((fs)->fs_active) \ ACTIVECGNUM((fs), (cg)) &= ~ACTIVECGOFF((cg)); \ } while (0) /* * The size of a cylinder group is calculated by CGSIZE. The maximum size * is limited by the fact that cylinder groups are at most one block. * Its size is derived from the size of the maps maintained in the * cylinder group and the (struct cg) size. */ #define CGSIZE(fs) \ /* base cg */ (sizeof(struct cg) + sizeof(int32_t) + \ /* old btotoff */ (fs)->fs_old_cpg * sizeof(int32_t) + \ /* old boff */ (fs)->fs_old_cpg * sizeof(u_int16_t) + \ /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ /* block map */ howmany((fs)->fs_fpg, NBBY) +\ /* if present */ ((fs)->fs_contigsumsize <= 0 ? 0 : \ /* cluster sum */ (fs)->fs_contigsumsize * sizeof(int32_t) + \ /* cluster map */ howmany(fragstoblks(fs, (fs)->fs_fpg), NBBY))) /* * The minimal number of cylinder groups that should be created. */ #define MINCYLGRPS 4 /* * Convert cylinder group to base address of its global summary info. */ #define fs_cs(fs, indx) fs_csp[indx] /* * Cylinder group block for a filesystem. */ #define CG_MAGIC 0x090255 struct cg { int32_t cg_firstfield; /* historic cyl groups linked list */ int32_t cg_magic; /* magic number */ int32_t cg_old_time; /* time last written */ u_int32_t cg_cgx; /* we are the cgx'th cylinder group */ int16_t cg_old_ncyl; /* number of cyl's this cg */ int16_t cg_old_niblk; /* number of inode blocks this cg */ u_int32_t cg_ndblk; /* number of data blocks this cg */ struct csum cg_cs; /* cylinder summary information */ u_int32_t cg_rotor; /* position of last used block */ u_int32_t cg_frotor; /* position of last used frag */ u_int32_t cg_irotor; /* position of last used inode */ u_int32_t cg_frsum[MAXFRAG]; /* counts of available frags */ int32_t cg_old_btotoff; /* (int32) block totals per cylinder */ int32_t cg_old_boff; /* (u_int16) free block positions */ u_int32_t cg_iusedoff; /* (u_int8) used inode map */ u_int32_t cg_freeoff; /* (u_int8) free block map */ u_int32_t cg_nextfreeoff; /* (u_int8) next available space */ u_int32_t cg_clustersumoff; /* (u_int32) counts of avail clusters */ u_int32_t cg_clusteroff; /* (u_int8) free cluster map */ u_int32_t cg_nclusterblks; /* number of clusters this cg */ u_int32_t cg_niblk; /* number of inode blocks this cg */ u_int32_t cg_initediblk; /* last initialized inode */ u_int32_t cg_unrefs; /* number of unreferenced inodes */ int32_t cg_sparecon32[1]; /* reserved for future use */ u_int32_t cg_ckhash; /* check-hash of this cg */ ufs_time_t cg_time; /* time last written */ int64_t cg_sparecon64[3]; /* reserved for future use */ u_int8_t cg_space[1]; /* space for cylinder group maps */ /* actually longer */ }; /* * Macros for access to cylinder group array structures */ #define cg_chkmagic(cgp) ((cgp)->cg_magic == CG_MAGIC) #define cg_inosused(cgp) \ ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_iusedoff)) #define cg_blksfree(cgp) \ ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_freeoff)) #define cg_clustersfree(cgp) \ ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_clusteroff)) #define cg_clustersum(cgp) \ ((int32_t *)((uintptr_t)(cgp) + (cgp)->cg_clustersumoff)) /* * Turn filesystem block numbers into disk block addresses. * This maps filesystem blocks to device size blocks. */ #define fsbtodb(fs, b) ((daddr_t)(b) << (fs)->fs_fsbtodb) #define dbtofsb(fs, b) ((b) >> (fs)->fs_fsbtodb) /* * Cylinder group macros to locate things in cylinder groups. * They calc filesystem addresses of cylinder group data structures. */ #define cgbase(fs, c) (((ufs2_daddr_t)(fs)->fs_fpg) * (c)) #define cgdata(fs, c) (cgdmin(fs, c) + (fs)->fs_metaspace) /* data zone */ #define cgmeta(fs, c) (cgdmin(fs, c)) /* meta data */ #define cgdmin(fs, c) (cgstart(fs, c) + (fs)->fs_dblkno) /* 1st data */ #define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode blk */ #define cgsblock(fs, c) (cgstart(fs, c) + (fs)->fs_sblkno) /* super blk */ #define cgtod(fs, c) (cgstart(fs, c) + (fs)->fs_cblkno) /* cg block */ #define cgstart(fs, c) \ ((fs)->fs_magic == FS_UFS2_MAGIC ? cgbase(fs, c) : \ (cgbase(fs, c) + (fs)->fs_old_cgoffset * ((c) & ~((fs)->fs_old_cgmask)))) /* * Macros for handling inode numbers: * inode number to filesystem block offset. * inode number to cylinder group number. * inode number to filesystem block address. */ #define ino_to_cg(fs, x) (((ino_t)(x)) / (fs)->fs_ipg) #define ino_to_fsba(fs, x) \ ((ufs2_daddr_t)(cgimin(fs, ino_to_cg(fs, (ino_t)(x))) + \ (blkstofrags((fs), ((((ino_t)(x)) % (fs)->fs_ipg) / INOPB(fs)))))) #define ino_to_fsbo(fs, x) (((ino_t)(x)) % INOPB(fs)) /* * Give cylinder group number for a filesystem block. * Give cylinder group block number for a filesystem block. */ #define dtog(fs, d) ((d) / (fs)->fs_fpg) #define dtogd(fs, d) ((d) % (fs)->fs_fpg) /* * Extract the bits for a block from a map. * Compute the cylinder and rotational position of a cyl block addr. */ #define blkmap(fs, map, loc) \ (((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - (fs)->fs_frag))) /* * The following macros optimize certain frequently calculated * quantities by using shifts and masks in place of divisions * modulos and multiplications. */ #define blkoff(fs, loc) /* calculates (loc % fs->fs_bsize) */ \ ((loc) & (fs)->fs_qbmask) #define fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \ ((loc) & (fs)->fs_qfmask) #define lfragtosize(fs, frag) /* calculates ((off_t)frag * fs->fs_fsize) */ \ (((off_t)(frag)) << (fs)->fs_fshift) #define lblktosize(fs, blk) /* calculates ((off_t)blk * fs->fs_bsize) */ \ (((off_t)(blk)) << (fs)->fs_bshift) /* Use this only when `blk' is known to be small, e.g., < UFS_NDADDR. */ #define smalllblktosize(fs, blk) /* calculates (blk * fs->fs_bsize) */ \ ((blk) << (fs)->fs_bshift) #define lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \ ((loc) >> (fs)->fs_bshift) #define numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \ ((loc) >> (fs)->fs_fshift) #define blkroundup(fs, size) /* calculates roundup(size, fs->fs_bsize) */ \ (((size) + (fs)->fs_qbmask) & (fs)->fs_bmask) #define fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \ (((size) + (fs)->fs_qfmask) & (fs)->fs_fmask) #define fragstoblks(fs, frags) /* calculates (frags / fs->fs_frag) */ \ ((frags) >> (fs)->fs_fragshift) #define blkstofrags(fs, blks) /* calculates (blks * fs->fs_frag) */ \ ((blks) << (fs)->fs_fragshift) #define fragnum(fs, fsb) /* calculates (fsb % fs->fs_frag) */ \ ((fsb) & ((fs)->fs_frag - 1)) #define blknum(fs, fsb) /* calculates rounddown(fsb, fs->fs_frag) */ \ ((fsb) &~ ((fs)->fs_frag - 1)) /* * Determine the number of available frags given a * percentage to hold in reserve. */ #define freespace(fs, percentreserved) \ (blkstofrags((fs), (fs)->fs_cstotal.cs_nbfree) + \ (fs)->fs_cstotal.cs_nffree - \ (((off_t)((fs)->fs_dsize)) * (percentreserved) / 100)) /* * Determining the size of a file block in the filesystem. */ #define blksize(fs, ip, lbn) \ (((lbn) >= UFS_NDADDR || (ip)->i_size >= \ (uint64_t)smalllblktosize(fs, (lbn) + 1)) \ ? (fs)->fs_bsize \ : (fragroundup(fs, blkoff(fs, (ip)->i_size)))) #define sblksize(fs, size, lbn) \ (((lbn) >= UFS_NDADDR || (size) >= ((lbn) + 1) << (fs)->fs_bshift) \ ? (fs)->fs_bsize \ : (fragroundup(fs, blkoff(fs, (size))))) /* * Number of indirects in a filesystem block. */ #define NINDIR(fs) ((fs)->fs_nindir) /* * Indirect lbns are aligned on UFS_NDADDR addresses where single indirects * are the negated address of the lowest lbn reachable, double indirects * are this lbn - 1 and triple indirects are this lbn - 2. This yields * an unusual bit order to determine level. */ static inline int lbn_level(ufs_lbn_t lbn) { if (lbn >= 0) return 0; switch (lbn & 0x3) { case 0: return (0); case 1: break; case 2: return (2); case 3: return (1); default: break; } return (-1); } static inline ufs_lbn_t lbn_offset(struct fs *fs, int level) { ufs_lbn_t res; for (res = 1; level > 0; level--) res *= NINDIR(fs); return (res); } /* * Number of inodes in a secondary storage block/fragment. */ #define INOPB(fs) ((fs)->fs_inopb) #define INOPF(fs) ((fs)->fs_inopb >> (fs)->fs_fragshift) /* * Softdep journal record format. */ #define JOP_ADDREF 1 /* Add a reference to an inode. */ #define JOP_REMREF 2 /* Remove a reference from an inode. */ #define JOP_NEWBLK 3 /* Allocate a block. */ #define JOP_FREEBLK 4 /* Free a block or a tree of blocks. */ #define JOP_MVREF 5 /* Move a reference from one off to another. */ #define JOP_TRUNC 6 /* Partial truncation record. */ #define JOP_SYNC 7 /* fsync() complete record. */ #define JREC_SIZE 32 /* Record and segment header size. */ #define SUJ_MIN (4 * 1024 * 1024) /* Minimum journal size */ #define SUJ_MAX (32 * 1024 * 1024) /* Maximum journal size */ #define SUJ_FILE ".sujournal" /* Journal file name */ /* * Size of the segment record header. There is at most one for each disk * block in the journal. The segment header is followed by an array of * records. fsck depends on the first element in each record being 'op' * and the second being 'ino'. Segments may span multiple disk blocks but * the header is present on each. */ struct jsegrec { uint64_t jsr_seq; /* Our sequence number */ uint64_t jsr_oldest; /* Oldest valid sequence number */ uint16_t jsr_cnt; /* Count of valid records */ uint16_t jsr_blocks; /* Count of device bsize blocks. */ uint32_t jsr_crc; /* 32bit crc of the valid space */ ufs_time_t jsr_time; /* timestamp for mount instance */ }; /* * Reference record. Records a single link count modification. */ struct jrefrec { uint32_t jr_op; uint32_t jr_ino; uint32_t jr_parent; uint16_t jr_nlink; uint16_t jr_mode; int64_t jr_diroff; uint64_t jr_unused; }; /* * Move record. Records a reference moving within a directory block. The * nlink is unchanged but we must search both locations. */ struct jmvrec { uint32_t jm_op; uint32_t jm_ino; uint32_t jm_parent; uint16_t jm_unused; int64_t jm_oldoff; int64_t jm_newoff; }; /* * Block record. A set of frags or tree of blocks starting at an indirect are * freed or a set of frags are allocated. */ struct jblkrec { uint32_t jb_op; uint32_t jb_ino; ufs2_daddr_t jb_blkno; ufs_lbn_t jb_lbn; uint16_t jb_frags; uint16_t jb_oldfrags; uint32_t jb_unused; }; /* * Truncation record. Records a partial truncation so that it may be * completed at check time. Also used for sync records. */ struct jtrncrec { uint32_t jt_op; uint32_t jt_ino; int64_t jt_size; uint32_t jt_extsize; uint32_t jt_pad[3]; }; union jrec { struct jsegrec rec_jsegrec; struct jrefrec rec_jrefrec; struct jmvrec rec_jmvrec; struct jblkrec rec_jblkrec; struct jtrncrec rec_jtrncrec; }; #ifdef CTASSERT CTASSERT(sizeof(struct jsegrec) == JREC_SIZE); CTASSERT(sizeof(struct jrefrec) == JREC_SIZE); CTASSERT(sizeof(struct jmvrec) == JREC_SIZE); CTASSERT(sizeof(struct jblkrec) == JREC_SIZE); CTASSERT(sizeof(struct jtrncrec) == JREC_SIZE); CTASSERT(sizeof(union jrec) == JREC_SIZE); #endif extern int inside[], around[]; extern u_char *fragtbl[]; /* * IOCTLs used for filesystem write suspension. */ #define UFSSUSPEND _IOW('U', 1, fsid_t) #define UFSRESUME _IO('U', 2) #endif