160727d8bSWarner Losh /*- 251369649SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause 351369649SPedro F. Giffuni * 4df8bae1dSRodney W. Grimes * Copyright (c) 1982, 1986, 1989, 1993 5df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 6df8bae1dSRodney W. Grimes * 7df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 8df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 9df8bae1dSRodney W. Grimes * are met: 10df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 11df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 12df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 13df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 14df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 1515c377c3SEd Maste * 3. Neither the name of the University nor the names of its contributors 16df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 17df8bae1dSRodney W. Grimes * without specific prior written permission. 18df8bae1dSRodney W. Grimes * 19df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29df8bae1dSRodney W. Grimes * SUCH DAMAGE. 30df8bae1dSRodney W. Grimes * 31996c772fSJohn Dyson * @(#)ffs_subr.c 8.5 (Berkeley) 3/21/95 32df8bae1dSRodney W. Grimes */ 33df8bae1dSRodney W. Grimes 34f4636c59SDavid E. O'Brien #include <sys/cdefs.h> 35f4636c59SDavid E. O'Brien __FBSDID("$FreeBSD$"); 36f4636c59SDavid E. O'Brien 37df8bae1dSRodney W. Grimes #include <sys/param.h> 38076002f2SKirk McKusick #include <sys/limits.h> 39df8bae1dSRodney W. Grimes 40c4473420SPeter Wemm #ifndef _KERNEL 41dffce215SKirk McKusick #include <stdio.h> 42dffce215SKirk McKusick #include <string.h> 43dffce215SKirk McKusick #include <stdlib.h> 44dffce215SKirk McKusick #include <time.h> 45dffce215SKirk McKusick #include <sys/errno.h> 46996c772fSJohn Dyson #include <ufs/ufs/dinode.h> 471c85e6a3SKirk McKusick #include <ufs/ffs/fs.h> 48dffce215SKirk McKusick 49ec888383SKirk McKusick uint32_t calculate_crc32c(uint32_t, const void *, size_t); 50ade67b50SKirk McKusick uint32_t ffs_calc_sbhash(struct fs *); 51dffce215SKirk McKusick struct malloc_type; 52dffce215SKirk McKusick #define UFS_MALLOC(size, type, flags) malloc(size) 53dffce215SKirk McKusick #define UFS_FREE(ptr, type) free(ptr) 54076002f2SKirk McKusick #define maxphys MAXPHYS 55dffce215SKirk McKusick 56dffce215SKirk McKusick #else /* _KERNEL */ 57df8bae1dSRodney W. Grimes #include <sys/systm.h> 58f89d2072SXin LI #include <sys/gsb_crc32.h> 591cd52ec3SBruce Evans #include <sys/lock.h> 601c85e6a3SKirk McKusick #include <sys/malloc.h> 611c85e6a3SKirk McKusick #include <sys/mount.h> 62df8bae1dSRodney W. Grimes #include <sys/vnode.h> 639626b608SPoul-Henning Kamp #include <sys/bio.h> 64df8bae1dSRodney W. Grimes #include <sys/buf.h> 6508637435SBruce Evans #include <sys/ucred.h> 6608637435SBruce Evans 67df8bae1dSRodney W. Grimes #include <ufs/ufs/quota.h> 68df8bae1dSRodney W. Grimes #include <ufs/ufs/inode.h> 691c85e6a3SKirk McKusick #include <ufs/ufs/extattr.h> 701c85e6a3SKirk McKusick #include <ufs/ufs/ufsmount.h> 711c85e6a3SKirk McKusick #include <ufs/ufs/ufs_extern.h> 72996c772fSJohn Dyson #include <ufs/ffs/ffs_extern.h> 731c85e6a3SKirk McKusick #include <ufs/ffs/fs.h> 74df8bae1dSRodney W. Grimes 75dffce215SKirk McKusick #define UFS_MALLOC(size, type, flags) malloc(size, type, flags) 76dffce215SKirk McKusick #define UFS_FREE(ptr, type) free(ptr, type) 77dffce215SKirk McKusick 78fb14e73cSKirk McKusick #endif /* _KERNEL */ 79df8bae1dSRodney W. Grimes 80df8bae1dSRodney W. Grimes /* 818f829a5cSKirk McKusick * Verify an inode check-hash. 828f829a5cSKirk McKusick */ 838f829a5cSKirk McKusick int 848f829a5cSKirk McKusick ffs_verify_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip) 858f829a5cSKirk McKusick { 86c8f55fc4SKirk McKusick uint32_t ckhash, save_ckhash; 878f829a5cSKirk McKusick 888f829a5cSKirk McKusick /* 898f829a5cSKirk McKusick * Return success if unallocated or we are not doing inode check-hash. 908f829a5cSKirk McKusick */ 918f829a5cSKirk McKusick if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0) 928f829a5cSKirk McKusick return (0); 938f829a5cSKirk McKusick /* 948f829a5cSKirk McKusick * Exclude di_ckhash from the crc32 calculation, e.g., always use 958f829a5cSKirk McKusick * a check-hash value of zero when calculating the check-hash. 968f829a5cSKirk McKusick */ 978f829a5cSKirk McKusick save_ckhash = dip->di_ckhash; 988f829a5cSKirk McKusick dip->di_ckhash = 0; 99c8f55fc4SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip)); 1008f829a5cSKirk McKusick dip->di_ckhash = save_ckhash; 101c8f55fc4SKirk McKusick if (save_ckhash == ckhash) 1028f829a5cSKirk McKusick return (0); 103c8f55fc4SKirk McKusick return (EINVAL); 1048f829a5cSKirk McKusick } 1058f829a5cSKirk McKusick 1068f829a5cSKirk McKusick /* 1078f829a5cSKirk McKusick * Update an inode check-hash. 1088f829a5cSKirk McKusick */ 1098f829a5cSKirk McKusick void 1108f829a5cSKirk McKusick ffs_update_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip) 1118f829a5cSKirk McKusick { 1128f829a5cSKirk McKusick 1138f829a5cSKirk McKusick if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0) 1148f829a5cSKirk McKusick return; 1158f829a5cSKirk McKusick /* 1168f829a5cSKirk McKusick * Exclude old di_ckhash from the crc32 calculation, e.g., always use 1178f829a5cSKirk McKusick * a check-hash value of zero when calculating the new check-hash. 1188f829a5cSKirk McKusick */ 1198f829a5cSKirk McKusick dip->di_ckhash = 0; 1208f829a5cSKirk McKusick dip->di_ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip)); 1218f829a5cSKirk McKusick } 1228f829a5cSKirk McKusick 1238f829a5cSKirk McKusick /* 124dffce215SKirk McKusick * These are the low-level functions that actually read and write 125dffce215SKirk McKusick * the superblock and its associated data. 126dffce215SKirk McKusick */ 127dffce215SKirk McKusick static off_t sblock_try[] = SBLOCKSEARCH; 128b21582eeSKirk McKusick static int readsuper(void *, struct fs **, off_t, int, 129dffce215SKirk McKusick int (*)(void *, off_t, void **, int)); 130076002f2SKirk McKusick static int validate_sblock(struct fs *, int); 131dffce215SKirk McKusick 132dffce215SKirk McKusick /* 133dffce215SKirk McKusick * Read a superblock from the devfd device. 134dffce215SKirk McKusick * 135dffce215SKirk McKusick * If an alternate superblock is specified, it is read. Otherwise the 136dffce215SKirk McKusick * set of locations given in the SBLOCKSEARCH list is searched for a 137dffce215SKirk McKusick * superblock. Memory is allocated for the superblock by the readfunc and 138dffce215SKirk McKusick * is returned. If filltype is non-NULL, additional memory is allocated 139dffce215SKirk McKusick * of type filltype and filled in with the superblock summary information. 140efbf3964SKirk McKusick * All memory is freed when any error is returned. 141dffce215SKirk McKusick * 142dffce215SKirk McKusick * If a superblock is found, zero is returned. Otherwise one of the 143dffce215SKirk McKusick * following error values is returned: 144dffce215SKirk McKusick * EIO: non-existent or truncated superblock. 145dffce215SKirk McKusick * EIO: error reading summary information. 146dffce215SKirk McKusick * ENOENT: no usable known superblock found. 147076002f2SKirk McKusick * ENOMEM: failed to allocate space for the superblock. 148dffce215SKirk McKusick * EINVAL: The previous newfs operation on this volume did not complete. 149dffce215SKirk McKusick * The administrator must complete newfs before using this volume. 150dffce215SKirk McKusick */ 151dffce215SKirk McKusick int 152b21582eeSKirk McKusick ffs_sbget(void *devfd, struct fs **fsp, off_t sblock, int flags, 153dffce215SKirk McKusick struct malloc_type *filltype, 154dffce215SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 155dffce215SKirk McKusick { 156dffce215SKirk McKusick struct fs *fs; 15734816cb9SKirk McKusick struct fs_summary_info *fs_si; 158076002f2SKirk McKusick int i, error; 159076002f2SKirk McKusick uint64_t size, blks; 160dffce215SKirk McKusick uint8_t *space; 161dffce215SKirk McKusick int32_t *lp; 162dffce215SKirk McKusick char *buf; 163dffce215SKirk McKusick 164efbf3964SKirk McKusick fs = NULL; 16516759360SMark Johnston *fsp = NULL; 166b21582eeSKirk McKusick if (sblock != UFS_STDSB) { 167b21582eeSKirk McKusick if ((error = readsuper(devfd, &fs, sblock, 168b21582eeSKirk McKusick flags | UFS_ALTSBLK, readfunc)) != 0) { 169efbf3964SKirk McKusick if (fs != NULL) 170efbf3964SKirk McKusick UFS_FREE(fs, filltype); 1714cbd996aSKirk McKusick return (error); 172efbf3964SKirk McKusick } 173dffce215SKirk McKusick } else { 174dffce215SKirk McKusick for (i = 0; sblock_try[i] != -1; i++) { 175b21582eeSKirk McKusick if ((error = readsuper(devfd, &fs, sblock_try[i], 176b21582eeSKirk McKusick flags, readfunc)) == 0) { 177b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0) { 178b21582eeSKirk McKusick *fsp = fs; 179b21582eeSKirk McKusick return (0); 180b21582eeSKirk McKusick } 181dffce215SKirk McKusick break; 182b21582eeSKirk McKusick } 183efbf3964SKirk McKusick if (fs != NULL) { 184efbf3964SKirk McKusick UFS_FREE(fs, filltype); 185efbf3964SKirk McKusick fs = NULL; 186efbf3964SKirk McKusick } 1874cbd996aSKirk McKusick if (error == ENOENT) 188dffce215SKirk McKusick continue; 1894cbd996aSKirk McKusick return (error); 190dffce215SKirk McKusick } 191dffce215SKirk McKusick if (sblock_try[i] == -1) 192dffce215SKirk McKusick return (ENOENT); 193dffce215SKirk McKusick } 194dffce215SKirk McKusick /* 195dffce215SKirk McKusick * Read in the superblock summary information. 196dffce215SKirk McKusick */ 197dffce215SKirk McKusick size = fs->fs_cssize; 198dffce215SKirk McKusick blks = howmany(size, fs->fs_fsize); 199dffce215SKirk McKusick if (fs->fs_contigsumsize > 0) 200dffce215SKirk McKusick size += fs->fs_ncg * sizeof(int32_t); 201dffce215SKirk McKusick size += fs->fs_ncg * sizeof(u_int8_t); 202076002f2SKirk McKusick if ((fs_si = UFS_MALLOC(sizeof(*fs_si), filltype, M_NOWAIT)) == NULL) { 20334816cb9SKirk McKusick UFS_FREE(fs, filltype); 204076002f2SKirk McKusick return (ENOMEM); 20534816cb9SKirk McKusick } 20634816cb9SKirk McKusick bzero(fs_si, sizeof(*fs_si)); 20734816cb9SKirk McKusick fs->fs_si = fs_si; 208076002f2SKirk McKusick if ((space = UFS_MALLOC(size, filltype, M_NOWAIT)) == NULL) { 20934816cb9SKirk McKusick UFS_FREE(fs->fs_si, filltype); 210efbf3964SKirk McKusick UFS_FREE(fs, filltype); 211076002f2SKirk McKusick return (ENOMEM); 212efbf3964SKirk McKusick } 213dffce215SKirk McKusick fs->fs_csp = (struct csum *)space; 214dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) { 215dffce215SKirk McKusick size = fs->fs_bsize; 216dffce215SKirk McKusick if (i + fs->fs_frag > blks) 217dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize; 21816759360SMark Johnston buf = NULL; 2194cbd996aSKirk McKusick error = (*readfunc)(devfd, 220dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)), (void **)&buf, size); 2214cbd996aSKirk McKusick if (error) { 222efbf3964SKirk McKusick if (buf != NULL) 22316759360SMark Johnston UFS_FREE(buf, filltype); 224dffce215SKirk McKusick UFS_FREE(fs->fs_csp, filltype); 22534816cb9SKirk McKusick UFS_FREE(fs->fs_si, filltype); 226efbf3964SKirk McKusick UFS_FREE(fs, filltype); 2274cbd996aSKirk McKusick return (error); 228dffce215SKirk McKusick } 229dffce215SKirk McKusick memcpy(space, buf, size); 230dffce215SKirk McKusick UFS_FREE(buf, filltype); 231dffce215SKirk McKusick space += size; 232dffce215SKirk McKusick } 233dffce215SKirk McKusick if (fs->fs_contigsumsize > 0) { 234dffce215SKirk McKusick fs->fs_maxcluster = lp = (int32_t *)space; 235dffce215SKirk McKusick for (i = 0; i < fs->fs_ncg; i++) 236dffce215SKirk McKusick *lp++ = fs->fs_contigsumsize; 237dffce215SKirk McKusick space = (uint8_t *)lp; 238dffce215SKirk McKusick } 239dffce215SKirk McKusick size = fs->fs_ncg * sizeof(u_int8_t); 240dffce215SKirk McKusick fs->fs_contigdirs = (u_int8_t *)space; 241dffce215SKirk McKusick bzero(fs->fs_contigdirs, size); 242efbf3964SKirk McKusick *fsp = fs; 243dffce215SKirk McKusick return (0); 244dffce215SKirk McKusick } 245dffce215SKirk McKusick 246dffce215SKirk McKusick /* 247dffce215SKirk McKusick * Try to read a superblock from the location specified by sblockloc. 248dffce215SKirk McKusick * Return zero on success or an errno on failure. 249dffce215SKirk McKusick */ 250dffce215SKirk McKusick static int 251b21582eeSKirk McKusick readsuper(void *devfd, struct fs **fsp, off_t sblockloc, int flags, 252b21582eeSKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 253dffce215SKirk McKusick { 254dffce215SKirk McKusick struct fs *fs; 255ec888383SKirk McKusick int error, res; 256ec888383SKirk McKusick uint32_t ckhash; 257dffce215SKirk McKusick 258dffce215SKirk McKusick error = (*readfunc)(devfd, sblockloc, (void **)fsp, SBLOCKSIZE); 259dffce215SKirk McKusick if (error != 0) 260dffce215SKirk McKusick return (error); 261dffce215SKirk McKusick fs = *fsp; 262dffce215SKirk McKusick if (fs->fs_magic == FS_BAD_MAGIC) 263dffce215SKirk McKusick return (EINVAL); 26436e08b01SKirk McKusick /* 26536e08b01SKirk McKusick * For UFS1 with a 65536 block size, the first backup superblock 26636e08b01SKirk McKusick * is at the same location as the UFS2 superblock. Since SBLOCK_UFS2 26736e08b01SKirk McKusick * is the first location checked, the first backup is the superblock 26836e08b01SKirk McKusick * that will be accessed. Here we fail the lookup so that we can 26936e08b01SKirk McKusick * retry with the correct location for the UFS1 superblock. 27036e08b01SKirk McKusick */ 271b21582eeSKirk McKusick if (fs->fs_magic == FS_UFS1_MAGIC && (flags & UFS_ALTSBLK) == 0 && 27236e08b01SKirk McKusick fs->fs_bsize == SBLOCK_UFS2 && sblockloc == SBLOCK_UFS2) 27336e08b01SKirk McKusick return (ENOENT); 274b21582eeSKirk McKusick if ((error = validate_sblock(fs, flags)) > 0) 275076002f2SKirk McKusick return (error); 276a02bd3e3SKirk McKusick /* 277a02bd3e3SKirk McKusick * If the filesystem has been run on a kernel without 278a02bd3e3SKirk McKusick * metadata check hashes, disable them. 279a02bd3e3SKirk McKusick */ 280a02bd3e3SKirk McKusick if ((fs->fs_flags & FS_METACKHASH) == 0) 281a02bd3e3SKirk McKusick fs->fs_metackhash = 0; 282996d40f9SKirk McKusick /* 283996d40f9SKirk McKusick * Clear any check-hashes that are not maintained 284996d40f9SKirk McKusick * by this kernel. Also clear any unsupported flags. 285996d40f9SKirk McKusick */ 286996d40f9SKirk McKusick fs->fs_metackhash &= CK_SUPPORTED; 287996d40f9SKirk McKusick fs->fs_flags &= FS_SUPPORTED; 288ade67b50SKirk McKusick if (fs->fs_ckhash != (ckhash = ffs_calc_sbhash(fs))) { 289b21582eeSKirk McKusick if ((flags & (UFS_NOMSG | UFS_NOHASHFAIL)) == 290b21582eeSKirk McKusick (UFS_NOMSG | UFS_NOHASHFAIL)) 291f2b39152SKirk McKusick return (0); 292b21582eeSKirk McKusick if ((flags & UFS_NOMSG) != 0) 293b21582eeSKirk McKusick return (EINTEGRITY); 294ec888383SKirk McKusick #ifdef _KERNEL 295ec888383SKirk McKusick res = uprintf("Superblock check-hash failed: recorded " 296fb14e73cSKirk McKusick "check-hash 0x%x != computed check-hash 0x%x%s\n", 297fb14e73cSKirk McKusick fs->fs_ckhash, ckhash, 298b21582eeSKirk McKusick (flags & UFS_NOHASHFAIL) != 0 ? " (Ignored)" : ""); 299ec888383SKirk McKusick #else 300ec888383SKirk McKusick res = 0; 301ec888383SKirk McKusick #endif 302ec888383SKirk McKusick /* 303ec888383SKirk McKusick * Print check-hash failure if no controlling terminal 304ec888383SKirk McKusick * in kernel or always if in user-mode (libufs). 305ec888383SKirk McKusick */ 306ec888383SKirk McKusick if (res == 0) 307ec888383SKirk McKusick printf("Superblock check-hash failed: recorded " 308ec888383SKirk McKusick "check-hash 0x%x != computed check-hash " 309fb14e73cSKirk McKusick "0x%x%s\n", fs->fs_ckhash, ckhash, 310b21582eeSKirk McKusick (flags & UFS_NOHASHFAIL) ? " (Ignored)" : ""); 311b21582eeSKirk McKusick if ((flags & UFS_NOHASHFAIL) != 0) 312fb14e73cSKirk McKusick return (0); 313b21582eeSKirk McKusick return (EINTEGRITY); 314fb14e73cSKirk McKusick } 315dffce215SKirk McKusick /* Have to set for old filesystems that predate this field */ 316dffce215SKirk McKusick fs->fs_sblockactualloc = sblockloc; 317efbf3964SKirk McKusick /* Not yet any summary information */ 31834816cb9SKirk McKusick fs->fs_si = NULL; 319dffce215SKirk McKusick return (0); 320dffce215SKirk McKusick } 321dffce215SKirk McKusick 322dffce215SKirk McKusick /* 323076002f2SKirk McKusick * Verify the filesystem values. 324076002f2SKirk McKusick */ 325076002f2SKirk McKusick #define ILOG2(num) (fls(num) - 1) 32614821130SWarner Losh #ifdef STANDALONE_SMALL 32714821130SWarner Losh #define MPRINT(...) do { } while (0) 32814821130SWarner Losh #else 32914821130SWarner Losh #define MPRINT(...) if (prtmsg) printf(__VA_ARGS__) 33014821130SWarner Losh #endif 331d22531d5SKirk McKusick #define FCHK(lhs, op, rhs, fmt) \ 33250dc4c7dSKirk McKusick if (lhs op rhs) { \ 333b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 33450dc4c7dSKirk McKusick #fmt ")\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 33550dc4c7dSKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs); \ 336b21582eeSKirk McKusick if (error == 0) \ 337b21582eeSKirk McKusick error = ENOENT; \ 33850dc4c7dSKirk McKusick } 339d22531d5SKirk McKusick #define WCHK(lhs, op, rhs, fmt) \ 340d22531d5SKirk McKusick if (lhs op rhs) { \ 341d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 342d22531d5SKirk McKusick #fmt ")%s\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2,\ 343d22531d5SKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs, wmsg);\ 344d22531d5SKirk McKusick if (error == 0) \ 345d22531d5SKirk McKusick error = warnerr; \ 346d22531d5SKirk McKusick } 347d22531d5SKirk McKusick #define FCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \ 34850dc4c7dSKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \ 349b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 35050dc4c7dSKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")\n", \ 35150dc4c7dSKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \ 35250dc4c7dSKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \ 35350dc4c7dSKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2); \ 354b21582eeSKirk McKusick if (error == 0) \ 355b21582eeSKirk McKusick error = ENOENT; \ 35650dc4c7dSKirk McKusick } 357d22531d5SKirk McKusick #define WCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \ 358d22531d5SKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \ 359d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 360d22531d5SKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")%s\n", \ 361d22531d5SKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \ 362d22531d5SKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \ 363d22531d5SKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2, wmsg); \ 364d22531d5SKirk McKusick if (error == 0) \ 365d22531d5SKirk McKusick error = warnerr; \ 366d22531d5SKirk McKusick } 367076002f2SKirk McKusick 368076002f2SKirk McKusick static int 369b21582eeSKirk McKusick validate_sblock(struct fs *fs, int flags) 370076002f2SKirk McKusick { 371548045bfSKirk McKusick u_long i, sectorsize; 372f3f5368dSKirk McKusick u_int64_t maxfilesize, sizepb; 373d22531d5SKirk McKusick int error, prtmsg, warnerr; 374d22531d5SKirk McKusick char *wmsg; 375076002f2SKirk McKusick 376b21582eeSKirk McKusick error = 0; 377076002f2SKirk McKusick sectorsize = dbtob(1); 378b21582eeSKirk McKusick prtmsg = ((flags & UFS_NOMSG) == 0); 379d22531d5SKirk McKusick warnerr = (flags & UFS_NOWARNFAIL) == UFS_NOWARNFAIL ? 0 : ENOENT; 380d22531d5SKirk McKusick wmsg = warnerr ? "" : " (Ignored)"; 381e6886616SKirk McKusick /* 382e6886616SKirk McKusick * If just validating for recovery, then do just the minimal 383e6886616SKirk McKusick * checks needed for the superblock fields needed to find 384e6886616SKirk McKusick * alternate superblocks. 385e6886616SKirk McKusick */ 386e6886616SKirk McKusick if ((flags & UFS_FSRONLY) == UFS_FSRONLY && 387e6886616SKirk McKusick (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC)) { 388e6886616SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) { 389e6886616SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx); 390e6886616SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) { 391e6886616SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd); 392e6886616SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd); 393e6886616SKirk McKusick } 394e6886616SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd); 395e6886616SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd); 396e6886616SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd); 397e6886616SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd); 398e6886616SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), 399e6886616SKirk McKusick %jd); 400e6886616SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd); 401e6886616SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd); 402e6886616SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd); 403e6886616SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd); 404e6886616SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd); 405e6886616SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd); 406e6886616SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd); 407e6886616SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd); 408e6886616SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, 409e6886616SKirk McKusick %jd); 410e6886616SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup( 411e6886616SKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize), 412e6886616SKirk McKusick fs->fs_frag), %jd); 413e6886616SKirk McKusick return (error); 414e6886616SKirk McKusick } 415076002f2SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) { 416184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0) 417d22531d5SKirk McKusick FCHK2(fs->fs_sblockactualloc, !=, SBLOCK_UFS2, 41850dc4c7dSKirk McKusick fs->fs_sblockactualloc, !=, 0, %jd); 419d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx); 420d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) * 42150dc4c7dSKirk McKusick sizeof(ufs2_daddr_t)), %jd); 422d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs2_daddr_t), 42350dc4c7dSKirk McKusick %jd); 424d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=, 425184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs2_dinode), %jd); 426076002f2SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) { 427184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0) 428d22531d5SKirk McKusick FCHK(fs->fs_sblockactualloc, >, SBLOCK_UFS1, %jd); 429d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd); 430d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd); 431d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs1_daddr_t), 43250dc4c7dSKirk McKusick %jd); 433d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=, 434184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs1_dinode), %jd); 435d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) * 43650dc4c7dSKirk McKusick sizeof(ufs1_daddr_t)), %jd); 437d22531d5SKirk McKusick WCHK(fs->fs_old_inodefmt, !=, FS_44INODEFMT, %jd); 438d22531d5SKirk McKusick WCHK(fs->fs_old_rotdelay, !=, 0, %jd); 439d22531d5SKirk McKusick WCHK(fs->fs_old_rps, !=, 60, %jd); 440d22531d5SKirk McKusick WCHK(fs->fs_old_nspf, !=, fs->fs_fsize / sectorsize, %jd); 441d22531d5SKirk McKusick WCHK(fs->fs_old_cpg, !=, 1, %jd); 442d22531d5SKirk McKusick WCHK(fs->fs_old_interleave, !=, 1, %jd); 443d22531d5SKirk McKusick WCHK(fs->fs_old_trackskew, !=, 0, %jd); 444d22531d5SKirk McKusick WCHK(fs->fs_old_cpc, !=, 0, %jd); 445d22531d5SKirk McKusick WCHK(fs->fs_old_postblformat, !=, 1, %jd); 446d22531d5SKirk McKusick WCHK(fs->fs_old_nrpos, !=, 1, %jd); 447d22531d5SKirk McKusick WCHK(fs->fs_old_spc, !=, fs->fs_fpg * fs->fs_old_nspf, %jd); 448d22531d5SKirk McKusick WCHK(fs->fs_old_nsect, !=, fs->fs_old_spc, %jd); 449d22531d5SKirk McKusick WCHK(fs->fs_old_npsect, !=, fs->fs_old_spc, %jd); 450d22531d5SKirk McKusick FCHK(fs->fs_old_ncyl, !=, fs->fs_ncg, %jd); 451076002f2SKirk McKusick } else { 45250dc4c7dSKirk McKusick /* Bad magic number, so assume not a superblock */ 453076002f2SKirk McKusick return (ENOENT); 454076002f2SKirk McKusick } 455d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd); 456d22531d5SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd); 457d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), %jd); 458d22531d5SKirk McKusick FCHK(powerof2(fs->fs_bsize), ==, 0, %jd); 459d22531d5SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd); 460d22531d5SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd); 461d22531d5SKirk McKusick FCHK(fs->fs_frag, !=, numfrags(fs, fs->fs_bsize), %jd); 462d22531d5SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd); 463d22531d5SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd); 464d22531d5SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd); 465d22531d5SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd); 466d22531d5SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd); 467d22531d5SKirk McKusick FCHK(fs->fs_ipg, <, 1, %jd); 468d22531d5SKirk McKusick FCHK(fs->fs_ipg * fs->fs_ncg, >, (((int64_t)(1)) << 32) - INOPB(fs), 469548045bfSKirk McKusick %jd); 470d22531d5SKirk McKusick FCHK(fs->fs_sbsize, >, SBLOCKSIZE, %jd); 471d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, <, fs->fs_bsize, %jd); 472d22531d5SKirk McKusick FCHK(powerof2(fs->fs_maxbsize), ==, 0, %jd); 473d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, >, FS_MAXCONTIG * fs->fs_bsize, %jd); 474d22531d5SKirk McKusick FCHK(fs->fs_bmask, !=, ~(fs->fs_bsize - 1), %#jx); 475d22531d5SKirk McKusick FCHK(fs->fs_fmask, !=, ~(fs->fs_fsize - 1), %#jx); 476d22531d5SKirk McKusick FCHK(fs->fs_qbmask, !=, ~fs->fs_bmask, %#jx); 477d22531d5SKirk McKusick FCHK(fs->fs_qfmask, !=, ~fs->fs_fmask, %#jx); 478d22531d5SKirk McKusick FCHK(fs->fs_bshift, !=, ILOG2(fs->fs_bsize), %jd); 479d22531d5SKirk McKusick FCHK(fs->fs_fshift, !=, ILOG2(fs->fs_fsize), %jd); 480d22531d5SKirk McKusick FCHK(fs->fs_fragshift, !=, ILOG2(fs->fs_frag), %jd); 481d22531d5SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd); 482d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd); 483d22531d5SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd); 484d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, %jd); 485d22531d5SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup( 48650dc4c7dSKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize), 48750dc4c7dSKirk McKusick fs->fs_frag), %jd); 488d22531d5SKirk McKusick FCHK(fs->fs_cblkno, !=, fs->fs_sblkno + 48950dc4c7dSKirk McKusick roundup(howmany(SBLOCKSIZE, fs->fs_fsize), fs->fs_frag), %jd); 490d22531d5SKirk McKusick FCHK(fs->fs_iblkno, !=, fs->fs_cblkno + fs->fs_frag, %jd); 491d22531d5SKirk McKusick FCHK(fs->fs_dblkno, !=, fs->fs_iblkno + fs->fs_ipg / INOPF(fs), %jd); 492d22531d5SKirk McKusick FCHK(fs->fs_cgsize, >, fs->fs_bsize, %jd); 4935bc926afSKirk McKusick /* 4945bc926afSKirk McKusick * This test is valid, however older versions of growfs failed 4955bc926afSKirk McKusick * to correctly update fs_dsize so will fail this test. Thus we 4965bc926afSKirk McKusick * exclude it from the requirements. 4975bc926afSKirk McKusick */ 4985bc926afSKirk McKusick #ifdef notdef 499d22531d5SKirk McKusick WCHK(fs->fs_dsize, !=, fs->fs_size - fs->fs_sblkno - 500076002f2SKirk McKusick fs->fs_ncg * (fs->fs_dblkno - fs->fs_sblkno) - 50150dc4c7dSKirk McKusick howmany(fs->fs_cssize, fs->fs_fsize), %jd); 5025bc926afSKirk McKusick #endif 503d22531d5SKirk McKusick WCHK(fs->fs_metaspace, <, 0, %jd); 504d22531d5SKirk McKusick WCHK(fs->fs_metaspace, >, fs->fs_fpg / 2, %jd); 505d22531d5SKirk McKusick WCHK(fs->fs_minfree, >, 99, %jd%%); 506076002f2SKirk McKusick maxfilesize = fs->fs_bsize * UFS_NDADDR - 1; 507076002f2SKirk McKusick for (sizepb = fs->fs_bsize, i = 0; i < UFS_NIADDR; i++) { 508076002f2SKirk McKusick sizepb *= NINDIR(fs); 509076002f2SKirk McKusick maxfilesize += sizepb; 510076002f2SKirk McKusick } 511d22531d5SKirk McKusick WCHK(fs->fs_maxfilesize, !=, maxfilesize, %jd); 512076002f2SKirk McKusick /* 513076002f2SKirk McKusick * These values have a tight interaction with each other that 514076002f2SKirk McKusick * makes it hard to tightly bound them. So we can only check 515076002f2SKirk McKusick * that they are within a broader possible range. 516076002f2SKirk McKusick * 517f3f5368dSKirk McKusick * The size cannot always be accurately determined, but ensure 518f3f5368dSKirk McKusick * that it is consistent with the number of cylinder groups (fs_ncg) 519f3f5368dSKirk McKusick * and the number of fragments per cylinder group (fs_fpg). Ensure 520f3f5368dSKirk McKusick * that the summary information size is correct and that it starts 521f3f5368dSKirk McKusick * and ends in the data area of the same cylinder group. 522076002f2SKirk McKusick */ 523d22531d5SKirk McKusick FCHK(fs->fs_size, <, 8 * fs->fs_frag, %jd); 524d22531d5SKirk McKusick WCHK(fs->fs_size, <=, (fs->fs_ncg - 1) * fs->fs_fpg, %jd); 525d22531d5SKirk McKusick WCHK(fs->fs_size, >, fs->fs_ncg * fs->fs_fpg, %jd); 526b21582eeSKirk McKusick /* 527b21582eeSKirk McKusick * If we are not requested to read in the csum data stop here 528b21582eeSKirk McKusick * as the correctness of the remaining values is only important 529b21582eeSKirk McKusick * to bound the space needed to be allocated to hold the csum data. 530b21582eeSKirk McKusick */ 531b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0) 532b21582eeSKirk McKusick return (error); 533d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, 0, %jd); 534d22531d5SKirk McKusick FCHK(fs->fs_cssize, !=, 535f3f5368dSKirk McKusick fragroundup(fs, fs->fs_ncg * sizeof(struct csum)), %jd); 536d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr), >, fs->fs_ncg, %jd); 537d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, cgdmin(fs, dtog(fs, fs->fs_csaddr)), %jd); 538d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr + howmany(fs->fs_cssize, fs->fs_fsize)), >, 539548045bfSKirk McKusick dtog(fs, fs->fs_csaddr), %jd); 540076002f2SKirk McKusick /* 541bc218d89SKirk McKusick * With file system clustering it is possible to allocate 542bc218d89SKirk McKusick * many contiguous blocks. The kernel variable maxphys defines 543bc218d89SKirk McKusick * the maximum transfer size permitted by the controller and/or 544bc218d89SKirk McKusick * buffering. The fs_maxcontig parameter controls the maximum 545bc218d89SKirk McKusick * number of blocks that the filesystem will read or write 546bc218d89SKirk McKusick * in a single transfer. It is calculated when the filesystem 547bc218d89SKirk McKusick * is created as maxphys / fs_bsize. The loader uses a maxphys 548bc218d89SKirk McKusick * of 128K even when running on a system that supports larger 549bc218d89SKirk McKusick * values. If the filesystem was built on a system that supports 550bc218d89SKirk McKusick * a larger maxphys (1M is typical) it will have configured 551bc218d89SKirk McKusick * fs_maxcontig for that larger system. So we bound the upper 552bc218d89SKirk McKusick * allowable limit for fs_maxconfig to be able to at least 553bc218d89SKirk McKusick * work with a 1M maxphys on the smallest block size filesystem: 554bc218d89SKirk McKusick * 1M / 4096 == 256. There is no harm in allowing the mounting of 555bc218d89SKirk McKusick * filesystems that make larger than maxphys I/O requests because 556bc218d89SKirk McKusick * those (mostly 32-bit machines) can (very slowly) handle I/O 557bc218d89SKirk McKusick * requests that exceed maxphys. 558076002f2SKirk McKusick */ 559d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, <, 0, %jd); 560d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, >, MAX(256, maxphys / fs->fs_bsize), %jd); 561d22531d5SKirk McKusick WCHK2(fs->fs_maxcontig, ==, 0, fs->fs_contigsumsize, !=, 0, %jd); 562d22531d5SKirk McKusick WCHK2(fs->fs_maxcontig, >, 1, fs->fs_contigsumsize, !=, 56350dc4c7dSKirk McKusick MIN(fs->fs_maxcontig, FS_MAXCONTIG), %jd); 564b21582eeSKirk McKusick return (error); 565076002f2SKirk McKusick } 566076002f2SKirk McKusick 567076002f2SKirk McKusick /* 568e6886616SKirk McKusick * Make an extensive search to find a superblock. If the superblock 569e6886616SKirk McKusick * in the standard place cannot be used, try looking for one of the 570e6886616SKirk McKusick * backup superblocks. 571e6886616SKirk McKusick * 572e6886616SKirk McKusick * Flags are made up of the following or'ed together options: 573e6886616SKirk McKusick * 574e6886616SKirk McKusick * UFS_NOMSG indicates that superblock inconsistency error messages 575e6886616SKirk McKusick * should not be printed. 576e6886616SKirk McKusick * 577e6886616SKirk McKusick * UFS_NOCSUM causes only the superblock itself to be returned, but does 578e6886616SKirk McKusick * not read in any auxillary data structures like the cylinder group 579e6886616SKirk McKusick * summary information. 580e6886616SKirk McKusick */ 581e6886616SKirk McKusick int 582e6886616SKirk McKusick ffs_sbsearch(void *devfd, struct fs **fsp, int reqflags, 583e6886616SKirk McKusick struct malloc_type *filltype, 584e6886616SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 585e6886616SKirk McKusick { 586e6886616SKirk McKusick struct fsrecovery *fsr; 587e6886616SKirk McKusick struct fs *protofs; 588e6886616SKirk McKusick void *fsrbuf; 589e6886616SKirk McKusick char *cp; 590e6886616SKirk McKusick long nocsum, flags, msg, cg; 591e6886616SKirk McKusick off_t sblk, secsize; 592e6886616SKirk McKusick int error; 593e6886616SKirk McKusick 594e6886616SKirk McKusick msg = (reqflags & UFS_NOMSG) == 0; 595e6886616SKirk McKusick nocsum = reqflags & UFS_NOCSUM; 596e6886616SKirk McKusick /* 597e6886616SKirk McKusick * Try normal superblock read and return it if it works. 598e6886616SKirk McKusick * 599e6886616SKirk McKusick * Suppress messages if it fails until we find out if 600e6886616SKirk McKusick * failure can be avoided. 601e6886616SKirk McKusick */ 602e6886616SKirk McKusick flags = UFS_NOMSG | nocsum; 603e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) == 0) 604e6886616SKirk McKusick return (0); 605e6886616SKirk McKusick /* 606e6886616SKirk McKusick * First try: ignoring hash failures. 607e6886616SKirk McKusick */ 608e6886616SKirk McKusick flags |= UFS_NOHASHFAIL; 609e6886616SKirk McKusick if (msg) 610e6886616SKirk McKusick flags &= ~UFS_NOMSG; 611e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) == 0) 612e6886616SKirk McKusick return (0); 613e6886616SKirk McKusick /* 614e6886616SKirk McKusick * Next up is to check if fields of the superblock that are 615e6886616SKirk McKusick * needed to find backup superblocks are usable. 616e6886616SKirk McKusick */ 617e6886616SKirk McKusick if (msg) 618e6886616SKirk McKusick printf("Attempted recovery for standard superblock: failed\n"); 619e6886616SKirk McKusick flags = UFS_FSRONLY | UFS_NOHASHFAIL | UFS_NOMSG; 620e6886616SKirk McKusick if (ffs_sbget(devfd, &protofs, UFS_STDSB, flags, filltype, 621e6886616SKirk McKusick readfunc) == 0) { 622e6886616SKirk McKusick if (msg) 623e6886616SKirk McKusick printf("Attempted extraction of recovery data from " 624e6886616SKirk McKusick "standard superblock: "); 625e6886616SKirk McKusick } else { 626e6886616SKirk McKusick /* 627e6886616SKirk McKusick * Final desperation is to see if alternate superblock 628e6886616SKirk McKusick * parameters have been saved in the boot area. 629e6886616SKirk McKusick */ 630e6886616SKirk McKusick if (msg) 631e6886616SKirk McKusick printf("Attempted extraction of recovery data from " 632e6886616SKirk McKusick "standard superblock: failed\nAttempt to find " 633e6886616SKirk McKusick "boot zone recovery data: "); 634e6886616SKirk McKusick /* 635e6886616SKirk McKusick * Look to see if recovery information has been saved. 636e6886616SKirk McKusick * If so we can generate a prototype superblock based 637e6886616SKirk McKusick * on that information. 638e6886616SKirk McKusick * 639e6886616SKirk McKusick * We need fragments-per-group, number of cylinder groups, 640e6886616SKirk McKusick * location of the superblock within the cylinder group, and 641e6886616SKirk McKusick * the conversion from filesystem fragments to disk blocks. 642e6886616SKirk McKusick * 643e6886616SKirk McKusick * When building a UFS2 filesystem, newfs(8) stores these 644e6886616SKirk McKusick * details at the end of the boot block area at the start 645e6886616SKirk McKusick * of the filesystem partition. If they have been overwritten 646e6886616SKirk McKusick * by a boot block, we fail. But usually they are there 647e6886616SKirk McKusick * and we can use them. 648e6886616SKirk McKusick * 649e6886616SKirk McKusick * We could ask the underlying device for its sector size, 650e6886616SKirk McKusick * but some devices lie. So we just try a plausible range. 651e6886616SKirk McKusick */ 652e6886616SKirk McKusick error = ENOENT; 653e6886616SKirk McKusick for (secsize = dbtob(1); secsize <= SBLOCKSIZE; secsize *= 2) 654e6886616SKirk McKusick if ((error = (*readfunc)(devfd, (SBLOCK_UFS2 - secsize), 655e6886616SKirk McKusick &fsrbuf, secsize)) == 0) 656e6886616SKirk McKusick break; 657e6886616SKirk McKusick if (error != 0) 658e6886616SKirk McKusick goto trynowarn; 659e6886616SKirk McKusick cp = fsrbuf; /* type change to keep compiler happy */ 660e6886616SKirk McKusick fsr = (struct fsrecovery *)&cp[secsize - sizeof *fsr]; 661e6886616SKirk McKusick if (fsr->fsr_magic != FS_UFS2_MAGIC || 662e6886616SKirk McKusick (protofs = UFS_MALLOC(SBLOCKSIZE, filltype, M_NOWAIT)) 663e6886616SKirk McKusick == NULL) { 664e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype); 665e6886616SKirk McKusick goto trynowarn; 666e6886616SKirk McKusick } 667e6886616SKirk McKusick memset(protofs, 0, sizeof(struct fs)); 668e6886616SKirk McKusick protofs->fs_fpg = fsr->fsr_fpg; 669e6886616SKirk McKusick protofs->fs_fsbtodb = fsr->fsr_fsbtodb; 670e6886616SKirk McKusick protofs->fs_sblkno = fsr->fsr_sblkno; 671e6886616SKirk McKusick protofs->fs_magic = fsr->fsr_magic; 672e6886616SKirk McKusick protofs->fs_ncg = fsr->fsr_ncg; 673e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype); 674e6886616SKirk McKusick } 675e6886616SKirk McKusick /* 676e6886616SKirk McKusick * Scan looking for alternative superblocks. 677e6886616SKirk McKusick */ 678e6886616SKirk McKusick for (cg = 0; cg < protofs->fs_ncg; cg++) { 679e6886616SKirk McKusick sblk = dbtob(fsbtodb(protofs, cgsblock(protofs, cg))); 680e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, sblk, UFS_NOMSG | nocsum, filltype, 681e6886616SKirk McKusick readfunc) == 0) { 682e6886616SKirk McKusick if (msg) 683e6886616SKirk McKusick printf("succeeded with alternate superblock " 684e6886616SKirk McKusick "at %jd\n", (intmax_t)btodb(sblk)); 685e6886616SKirk McKusick UFS_FREE(protofs, filltype); 686e6886616SKirk McKusick return (0); 687e6886616SKirk McKusick } 688e6886616SKirk McKusick } 689e6886616SKirk McKusick UFS_FREE(protofs, filltype); 690e6886616SKirk McKusick /* 691e6886616SKirk McKusick * Our alternate superblock strategies failed. Our last ditch effort 692e6886616SKirk McKusick * is to see if the standard superblock has only non-critical errors. 693e6886616SKirk McKusick */ 694e6886616SKirk McKusick trynowarn: 695e6886616SKirk McKusick flags = UFS_NOWARNFAIL | UFS_NOMSG | nocsum; 696e6886616SKirk McKusick if (msg) { 697e6886616SKirk McKusick printf("failed\n"); 698e6886616SKirk McKusick flags &= ~UFS_NOMSG; 699e6886616SKirk McKusick } 700e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) != 0) 701e6886616SKirk McKusick return (ENOENT); 702e6886616SKirk McKusick if (msg) 703e6886616SKirk McKusick printf("Using standard superblock with non-critical errors.\n"); 704e6886616SKirk McKusick return (0); 705e6886616SKirk McKusick } 706e6886616SKirk McKusick 707e6886616SKirk McKusick /* 708dffce215SKirk McKusick * Write a superblock to the devfd device from the memory pointed to by fs. 709dffce215SKirk McKusick * Write out the superblock summary information if it is present. 710dffce215SKirk McKusick * 711dffce215SKirk McKusick * If the write is successful, zero is returned. Otherwise one of the 712dffce215SKirk McKusick * following error values is returned: 713dffce215SKirk McKusick * EIO: failed to write superblock. 714dffce215SKirk McKusick * EIO: failed to write superblock summary information. 715dffce215SKirk McKusick */ 716dffce215SKirk McKusick int 717dffce215SKirk McKusick ffs_sbput(void *devfd, struct fs *fs, off_t loc, 718dffce215SKirk McKusick int (*writefunc)(void *devfd, off_t loc, void *buf, int size)) 719dffce215SKirk McKusick { 720dffce215SKirk McKusick int i, error, blks, size; 721dffce215SKirk McKusick uint8_t *space; 722dffce215SKirk McKusick 723dffce215SKirk McKusick /* 724dffce215SKirk McKusick * If there is summary information, write it first, so if there 725dffce215SKirk McKusick * is an error, the superblock will not be marked as clean. 726dffce215SKirk McKusick */ 72734816cb9SKirk McKusick if (fs->fs_si != NULL && fs->fs_csp != NULL) { 728dffce215SKirk McKusick blks = howmany(fs->fs_cssize, fs->fs_fsize); 729dffce215SKirk McKusick space = (uint8_t *)fs->fs_csp; 730dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) { 731dffce215SKirk McKusick size = fs->fs_bsize; 732dffce215SKirk McKusick if (i + fs->fs_frag > blks) 733dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize; 734dffce215SKirk McKusick if ((error = (*writefunc)(devfd, 735dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)), 736dffce215SKirk McKusick space, size)) != 0) 737dffce215SKirk McKusick return (error); 738dffce215SKirk McKusick space += size; 739dffce215SKirk McKusick } 740dffce215SKirk McKusick } 741dffce215SKirk McKusick fs->fs_fmod = 0; 74293440bbeSKirk McKusick #ifndef _KERNEL 74393440bbeSKirk McKusick { 74493440bbeSKirk McKusick struct fs_summary_info *fs_si; 74593440bbeSKirk McKusick 74693440bbeSKirk McKusick fs->fs_time = time(NULL); 74793440bbeSKirk McKusick /* Clear the pointers for the duration of writing. */ 74893440bbeSKirk McKusick fs_si = fs->fs_si; 74993440bbeSKirk McKusick fs->fs_si = NULL; 750ade67b50SKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs); 75193440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); 75293440bbeSKirk McKusick fs->fs_si = fs_si; 75393440bbeSKirk McKusick } 75493440bbeSKirk McKusick #else /* _KERNEL */ 75593440bbeSKirk McKusick fs->fs_time = time_second; 75693440bbeSKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs); 75793440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); 75893440bbeSKirk McKusick #endif /* _KERNEL */ 759dffce215SKirk McKusick return (error); 760dffce215SKirk McKusick } 761dffce215SKirk McKusick 762dffce215SKirk McKusick /* 763ec888383SKirk McKusick * Calculate the check-hash for a superblock. 764ec888383SKirk McKusick */ 765ade67b50SKirk McKusick uint32_t 766ade67b50SKirk McKusick ffs_calc_sbhash(struct fs *fs) 767ec888383SKirk McKusick { 768ec888383SKirk McKusick uint32_t ckhash, save_ckhash; 769ec888383SKirk McKusick 770ec888383SKirk McKusick /* 771ec888383SKirk McKusick * A filesystem that was using a superblock ckhash may be moved 772ec888383SKirk McKusick * to an older kernel that does not support ckhashes. The 773ec888383SKirk McKusick * older kernel will clear the FS_METACKHASH flag indicating 774ec888383SKirk McKusick * that it does not update hashes. When the disk is moved back 775ec888383SKirk McKusick * to a kernel capable of ckhashes it disables them on mount: 776ec888383SKirk McKusick * 777ec888383SKirk McKusick * if ((fs->fs_flags & FS_METACKHASH) == 0) 778ec888383SKirk McKusick * fs->fs_metackhash = 0; 779ec888383SKirk McKusick * 780ec888383SKirk McKusick * This leaves (fs->fs_metackhash & CK_SUPERBLOCK) == 0) with an 781ec888383SKirk McKusick * old stale value in the fs->fs_ckhash field. Thus the need to 782ec888383SKirk McKusick * just accept what is there. 783ec888383SKirk McKusick */ 784ec888383SKirk McKusick if ((fs->fs_metackhash & CK_SUPERBLOCK) == 0) 785ec888383SKirk McKusick return (fs->fs_ckhash); 786ec888383SKirk McKusick 787ec888383SKirk McKusick save_ckhash = fs->fs_ckhash; 788ec888383SKirk McKusick fs->fs_ckhash = 0; 789ec888383SKirk McKusick /* 790ec888383SKirk McKusick * If newly read from disk, the caller is responsible for 791ec888383SKirk McKusick * verifying that fs->fs_sbsize <= SBLOCKSIZE. 792ec888383SKirk McKusick */ 793ec888383SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)fs, fs->fs_sbsize); 794ec888383SKirk McKusick fs->fs_ckhash = save_ckhash; 795ec888383SKirk McKusick return (ckhash); 796ec888383SKirk McKusick } 797ec888383SKirk McKusick 798ec888383SKirk McKusick /* 799df8bae1dSRodney W. Grimes * Update the frsum fields to reflect addition or deletion 800df8bae1dSRodney W. Grimes * of some frags. 801df8bae1dSRodney W. Grimes */ 802df8bae1dSRodney W. Grimes void 80315c377c3SEd Maste ffs_fragacct(struct fs *fs, int fragmap, int32_t fraglist[], int cnt) 804df8bae1dSRodney W. Grimes { 805df8bae1dSRodney W. Grimes int inblk; 80605f4ff5dSPoul-Henning Kamp int field, subfield; 80705f4ff5dSPoul-Henning Kamp int siz, pos; 808df8bae1dSRodney W. Grimes 809df8bae1dSRodney W. Grimes inblk = (int)(fragtbl[fs->fs_frag][fragmap]) << 1; 810df8bae1dSRodney W. Grimes fragmap <<= 1; 811df8bae1dSRodney W. Grimes for (siz = 1; siz < fs->fs_frag; siz++) { 812df8bae1dSRodney W. Grimes if ((inblk & (1 << (siz + (fs->fs_frag % NBBY)))) == 0) 813df8bae1dSRodney W. Grimes continue; 814df8bae1dSRodney W. Grimes field = around[siz]; 815df8bae1dSRodney W. Grimes subfield = inside[siz]; 816df8bae1dSRodney W. Grimes for (pos = siz; pos <= fs->fs_frag; pos++) { 817df8bae1dSRodney W. Grimes if ((fragmap & field) == subfield) { 818df8bae1dSRodney W. Grimes fraglist[siz] += cnt; 819df8bae1dSRodney W. Grimes pos += siz; 820df8bae1dSRodney W. Grimes field <<= siz; 821df8bae1dSRodney W. Grimes subfield <<= siz; 822df8bae1dSRodney W. Grimes } 823df8bae1dSRodney W. Grimes field <<= 1; 824df8bae1dSRodney W. Grimes subfield <<= 1; 825df8bae1dSRodney W. Grimes } 826df8bae1dSRodney W. Grimes } 827df8bae1dSRodney W. Grimes } 828df8bae1dSRodney W. Grimes 829df8bae1dSRodney W. Grimes /* 830df8bae1dSRodney W. Grimes * block operations 831df8bae1dSRodney W. Grimes * 832df8bae1dSRodney W. Grimes * check if a block is available 833df8bae1dSRodney W. Grimes */ 834df8bae1dSRodney W. Grimes int 83515c377c3SEd Maste ffs_isblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) 836df8bae1dSRodney W. Grimes { 837df8bae1dSRodney W. Grimes unsigned char mask; 838df8bae1dSRodney W. Grimes 839df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 840df8bae1dSRodney W. Grimes case 8: 841df8bae1dSRodney W. Grimes return (cp[h] == 0xff); 842df8bae1dSRodney W. Grimes case 4: 843df8bae1dSRodney W. Grimes mask = 0x0f << ((h & 0x1) << 2); 844df8bae1dSRodney W. Grimes return ((cp[h >> 1] & mask) == mask); 845df8bae1dSRodney W. Grimes case 2: 846df8bae1dSRodney W. Grimes mask = 0x03 << ((h & 0x3) << 1); 847df8bae1dSRodney W. Grimes return ((cp[h >> 2] & mask) == mask); 848df8bae1dSRodney W. Grimes case 1: 849df8bae1dSRodney W. Grimes mask = 0x01 << (h & 0x7); 850df8bae1dSRodney W. Grimes return ((cp[h >> 3] & mask) == mask); 851df8bae1dSRodney W. Grimes default: 852113db2ddSJeff Roberson #ifdef _KERNEL 853df8bae1dSRodney W. Grimes panic("ffs_isblock"); 854113db2ddSJeff Roberson #endif 855113db2ddSJeff Roberson break; 856113db2ddSJeff Roberson } 857113db2ddSJeff Roberson return (0); 858113db2ddSJeff Roberson } 859113db2ddSJeff Roberson 860113db2ddSJeff Roberson /* 861113db2ddSJeff Roberson * check if a block is free 862113db2ddSJeff Roberson */ 863113db2ddSJeff Roberson int 86415c377c3SEd Maste ffs_isfreeblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) 865113db2ddSJeff Roberson { 866113db2ddSJeff Roberson 867113db2ddSJeff Roberson switch ((int)fs->fs_frag) { 868113db2ddSJeff Roberson case 8: 869113db2ddSJeff Roberson return (cp[h] == 0); 870113db2ddSJeff Roberson case 4: 871113db2ddSJeff Roberson return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0); 872113db2ddSJeff Roberson case 2: 873113db2ddSJeff Roberson return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0); 874113db2ddSJeff Roberson case 1: 875113db2ddSJeff Roberson return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0); 876113db2ddSJeff Roberson default: 877113db2ddSJeff Roberson #ifdef _KERNEL 878113db2ddSJeff Roberson panic("ffs_isfreeblock"); 879113db2ddSJeff Roberson #endif 880113db2ddSJeff Roberson break; 881df8bae1dSRodney W. Grimes } 882589c7af9SKirk McKusick return (0); 883df8bae1dSRodney W. Grimes } 884df8bae1dSRodney W. Grimes 885df8bae1dSRodney W. Grimes /* 886df8bae1dSRodney W. Grimes * take a block out of the map 887df8bae1dSRodney W. Grimes */ 888df8bae1dSRodney W. Grimes void 88915c377c3SEd Maste ffs_clrblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) 890df8bae1dSRodney W. Grimes { 891df8bae1dSRodney W. Grimes 892df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 893df8bae1dSRodney W. Grimes case 8: 894df8bae1dSRodney W. Grimes cp[h] = 0; 895df8bae1dSRodney W. Grimes return; 896df8bae1dSRodney W. Grimes case 4: 897df8bae1dSRodney W. Grimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 898df8bae1dSRodney W. Grimes return; 899df8bae1dSRodney W. Grimes case 2: 900df8bae1dSRodney W. Grimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 901df8bae1dSRodney W. Grimes return; 902df8bae1dSRodney W. Grimes case 1: 903df8bae1dSRodney W. Grimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 904df8bae1dSRodney W. Grimes return; 905df8bae1dSRodney W. Grimes default: 906113db2ddSJeff Roberson #ifdef _KERNEL 907df8bae1dSRodney W. Grimes panic("ffs_clrblock"); 908113db2ddSJeff Roberson #endif 909113db2ddSJeff Roberson break; 910df8bae1dSRodney W. Grimes } 911df8bae1dSRodney W. Grimes } 912df8bae1dSRodney W. Grimes 913df8bae1dSRodney W. Grimes /* 914df8bae1dSRodney W. Grimes * put a block into the map 915df8bae1dSRodney W. Grimes */ 916df8bae1dSRodney W. Grimes void 91715c377c3SEd Maste ffs_setblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) 918df8bae1dSRodney W. Grimes { 919df8bae1dSRodney W. Grimes 920df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 921df8bae1dSRodney W. Grimes case 8: 922df8bae1dSRodney W. Grimes cp[h] = 0xff; 923df8bae1dSRodney W. Grimes return; 924df8bae1dSRodney W. Grimes case 4: 925df8bae1dSRodney W. Grimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 926df8bae1dSRodney W. Grimes return; 927df8bae1dSRodney W. Grimes case 2: 928df8bae1dSRodney W. Grimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 929df8bae1dSRodney W. Grimes return; 930df8bae1dSRodney W. Grimes case 1: 931df8bae1dSRodney W. Grimes cp[h >> 3] |= (0x01 << (h & 0x7)); 932df8bae1dSRodney W. Grimes return; 933df8bae1dSRodney W. Grimes default: 934113db2ddSJeff Roberson #ifdef _KERNEL 935df8bae1dSRodney W. Grimes panic("ffs_setblock"); 936113db2ddSJeff Roberson #endif 937113db2ddSJeff Roberson break; 938df8bae1dSRodney W. Grimes } 939df8bae1dSRodney W. Grimes } 940113db2ddSJeff Roberson 941113db2ddSJeff Roberson /* 942113db2ddSJeff Roberson * Update the cluster map because of an allocation or free. 943113db2ddSJeff Roberson * 944113db2ddSJeff Roberson * Cnt == 1 means free; cnt == -1 means allocating. 945113db2ddSJeff Roberson */ 946113db2ddSJeff Roberson void 94715c377c3SEd Maste ffs_clusteracct(struct fs *fs, struct cg *cgp, ufs1_daddr_t blkno, int cnt) 948113db2ddSJeff Roberson { 949113db2ddSJeff Roberson int32_t *sump; 950113db2ddSJeff Roberson int32_t *lp; 951113db2ddSJeff Roberson u_char *freemapp, *mapp; 952e1c27cf7SKirk McKusick int i, start, end, forw, back, map; 953e1c27cf7SKirk McKusick u_int bit; 954113db2ddSJeff Roberson 955113db2ddSJeff Roberson if (fs->fs_contigsumsize <= 0) 956113db2ddSJeff Roberson return; 957113db2ddSJeff Roberson freemapp = cg_clustersfree(cgp); 958113db2ddSJeff Roberson sump = cg_clustersum(cgp); 959113db2ddSJeff Roberson /* 960113db2ddSJeff Roberson * Allocate or clear the actual block. 961113db2ddSJeff Roberson */ 962113db2ddSJeff Roberson if (cnt > 0) 963113db2ddSJeff Roberson setbit(freemapp, blkno); 964113db2ddSJeff Roberson else 965113db2ddSJeff Roberson clrbit(freemapp, blkno); 966113db2ddSJeff Roberson /* 967113db2ddSJeff Roberson * Find the size of the cluster going forward. 968113db2ddSJeff Roberson */ 969113db2ddSJeff Roberson start = blkno + 1; 970113db2ddSJeff Roberson end = start + fs->fs_contigsumsize; 971113db2ddSJeff Roberson if (end >= cgp->cg_nclusterblks) 972113db2ddSJeff Roberson end = cgp->cg_nclusterblks; 973113db2ddSJeff Roberson mapp = &freemapp[start / NBBY]; 974113db2ddSJeff Roberson map = *mapp++; 975e1c27cf7SKirk McKusick bit = 1U << (start % NBBY); 976113db2ddSJeff Roberson for (i = start; i < end; i++) { 977113db2ddSJeff Roberson if ((map & bit) == 0) 978113db2ddSJeff Roberson break; 979113db2ddSJeff Roberson if ((i & (NBBY - 1)) != (NBBY - 1)) { 980113db2ddSJeff Roberson bit <<= 1; 981113db2ddSJeff Roberson } else { 982113db2ddSJeff Roberson map = *mapp++; 983113db2ddSJeff Roberson bit = 1; 984113db2ddSJeff Roberson } 985113db2ddSJeff Roberson } 986113db2ddSJeff Roberson forw = i - start; 987113db2ddSJeff Roberson /* 988113db2ddSJeff Roberson * Find the size of the cluster going backward. 989113db2ddSJeff Roberson */ 990113db2ddSJeff Roberson start = blkno - 1; 991113db2ddSJeff Roberson end = start - fs->fs_contigsumsize; 992113db2ddSJeff Roberson if (end < 0) 993113db2ddSJeff Roberson end = -1; 994113db2ddSJeff Roberson mapp = &freemapp[start / NBBY]; 995113db2ddSJeff Roberson map = *mapp--; 996e1c27cf7SKirk McKusick bit = 1U << (start % NBBY); 997113db2ddSJeff Roberson for (i = start; i > end; i--) { 998113db2ddSJeff Roberson if ((map & bit) == 0) 999113db2ddSJeff Roberson break; 1000113db2ddSJeff Roberson if ((i & (NBBY - 1)) != 0) { 1001113db2ddSJeff Roberson bit >>= 1; 1002113db2ddSJeff Roberson } else { 1003113db2ddSJeff Roberson map = *mapp--; 1004e1c27cf7SKirk McKusick bit = 1U << (NBBY - 1); 1005113db2ddSJeff Roberson } 1006113db2ddSJeff Roberson } 1007113db2ddSJeff Roberson back = start - i; 1008113db2ddSJeff Roberson /* 1009113db2ddSJeff Roberson * Account for old cluster and the possibly new forward and 1010113db2ddSJeff Roberson * back clusters. 1011113db2ddSJeff Roberson */ 1012113db2ddSJeff Roberson i = back + forw + 1; 1013113db2ddSJeff Roberson if (i > fs->fs_contigsumsize) 1014113db2ddSJeff Roberson i = fs->fs_contigsumsize; 1015113db2ddSJeff Roberson sump[i] += cnt; 1016113db2ddSJeff Roberson if (back > 0) 1017113db2ddSJeff Roberson sump[back] -= cnt; 1018113db2ddSJeff Roberson if (forw > 0) 1019113db2ddSJeff Roberson sump[forw] -= cnt; 1020113db2ddSJeff Roberson /* 1021113db2ddSJeff Roberson * Update cluster summary information. 1022113db2ddSJeff Roberson */ 1023113db2ddSJeff Roberson lp = &sump[fs->fs_contigsumsize]; 1024113db2ddSJeff Roberson for (i = fs->fs_contigsumsize; i > 0; i--) 1025113db2ddSJeff Roberson if (*lp-- > 0) 1026113db2ddSJeff Roberson break; 1027113db2ddSJeff Roberson fs->fs_maxcluster[cgp->cg_cgx] = i; 1028113db2ddSJeff Roberson } 1029