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); \ 336f0be378aSKirk McKusick if (error < 0) \ 337f0be378aSKirk McKusick return (ENOENT); \ 338b21582eeSKirk McKusick if (error == 0) \ 339b21582eeSKirk McKusick error = ENOENT; \ 34050dc4c7dSKirk McKusick } 341d22531d5SKirk McKusick #define WCHK(lhs, op, rhs, fmt) \ 342d22531d5SKirk McKusick if (lhs op rhs) { \ 343d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 344d22531d5SKirk McKusick #fmt ")%s\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2,\ 345d22531d5SKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs, wmsg);\ 346d22531d5SKirk McKusick if (error == 0) \ 347d22531d5SKirk McKusick error = warnerr; \ 348d22531d5SKirk McKusick } 349d22531d5SKirk McKusick #define FCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \ 35050dc4c7dSKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \ 351b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 35250dc4c7dSKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")\n", \ 35350dc4c7dSKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \ 35450dc4c7dSKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \ 35550dc4c7dSKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2); \ 356f0be378aSKirk McKusick if (error < 0) \ 357f0be378aSKirk McKusick return (ENOENT); \ 358b21582eeSKirk McKusick if (error == 0) \ 359b21582eeSKirk McKusick error = ENOENT; \ 36050dc4c7dSKirk McKusick } 361d22531d5SKirk McKusick #define WCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \ 362d22531d5SKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \ 363d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 364d22531d5SKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")%s\n", \ 365d22531d5SKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \ 366d22531d5SKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \ 367d22531d5SKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2, wmsg); \ 368d22531d5SKirk McKusick if (error == 0) \ 369d22531d5SKirk McKusick error = warnerr; \ 370d22531d5SKirk McKusick } 371076002f2SKirk McKusick 372076002f2SKirk McKusick static int 373b21582eeSKirk McKusick validate_sblock(struct fs *fs, int flags) 374076002f2SKirk McKusick { 375548045bfSKirk McKusick u_long i, sectorsize; 376f3f5368dSKirk McKusick u_int64_t maxfilesize, sizepb; 377d22531d5SKirk McKusick int error, prtmsg, warnerr; 378d22531d5SKirk McKusick char *wmsg; 379076002f2SKirk McKusick 380b21582eeSKirk McKusick error = 0; 381076002f2SKirk McKusick sectorsize = dbtob(1); 382b21582eeSKirk McKusick prtmsg = ((flags & UFS_NOMSG) == 0); 383d22531d5SKirk McKusick warnerr = (flags & UFS_NOWARNFAIL) == UFS_NOWARNFAIL ? 0 : ENOENT; 384d22531d5SKirk McKusick wmsg = warnerr ? "" : " (Ignored)"; 385e6886616SKirk McKusick /* 386e6886616SKirk McKusick * If just validating for recovery, then do just the minimal 387e6886616SKirk McKusick * checks needed for the superblock fields needed to find 388e6886616SKirk McKusick * alternate superblocks. 389e6886616SKirk McKusick */ 390e6886616SKirk McKusick if ((flags & UFS_FSRONLY) == UFS_FSRONLY && 391e6886616SKirk McKusick (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC)) { 392f0be378aSKirk McKusick error = -1; /* fail on first error */ 393e6886616SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) { 394e6886616SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx); 395e6886616SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) { 396e6886616SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd); 397e6886616SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd); 398e6886616SKirk McKusick } 399e6886616SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd); 400e6886616SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd); 401e6886616SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd); 402e6886616SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd); 403e6886616SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), 404e6886616SKirk McKusick %jd); 405e6886616SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd); 406e6886616SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd); 407e6886616SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd); 40882ee4e1cSKirk McKusick FCHK(fs->fs_sbsize, >, SBLOCKSIZE, %jd); 40982ee4e1cSKirk McKusick FCHK(fs->fs_sbsize, <, (signed)sizeof(struct fs), %jd); 410e15d8f23SKirk McKusick FCHK(fs->fs_sbsize % sectorsize, !=, 0, %jd); 411e6886616SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd); 412e6886616SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd); 413e6886616SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd); 414e6886616SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd); 415e6886616SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd); 416e6886616SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, 417e6886616SKirk McKusick %jd); 418e6886616SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup( 419e6886616SKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize), 420e6886616SKirk McKusick fs->fs_frag), %jd); 421e6886616SKirk McKusick return (error); 422e6886616SKirk McKusick } 423076002f2SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) { 424184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0) 425d22531d5SKirk McKusick FCHK2(fs->fs_sblockactualloc, !=, SBLOCK_UFS2, 42650dc4c7dSKirk McKusick fs->fs_sblockactualloc, !=, 0, %jd); 427d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx); 428d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) * 42950dc4c7dSKirk McKusick sizeof(ufs2_daddr_t)), %jd); 430d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs2_daddr_t), 43150dc4c7dSKirk McKusick %jd); 432d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=, 433184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs2_dinode), %jd); 434076002f2SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) { 435184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0) 436d22531d5SKirk McKusick FCHK(fs->fs_sblockactualloc, >, SBLOCK_UFS1, %jd); 437d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd); 438d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd); 439d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs1_daddr_t), 44050dc4c7dSKirk McKusick %jd); 441d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=, 442184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs1_dinode), %jd); 443d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) * 44450dc4c7dSKirk McKusick sizeof(ufs1_daddr_t)), %jd); 445d22531d5SKirk McKusick WCHK(fs->fs_old_inodefmt, !=, FS_44INODEFMT, %jd); 446d22531d5SKirk McKusick WCHK(fs->fs_old_rotdelay, !=, 0, %jd); 447d22531d5SKirk McKusick WCHK(fs->fs_old_rps, !=, 60, %jd); 448d22531d5SKirk McKusick WCHK(fs->fs_old_nspf, !=, fs->fs_fsize / sectorsize, %jd); 449f0be378aSKirk McKusick FCHK(fs->fs_old_cpg, !=, 1, %jd); 450d22531d5SKirk McKusick WCHK(fs->fs_old_interleave, !=, 1, %jd); 451d22531d5SKirk McKusick WCHK(fs->fs_old_trackskew, !=, 0, %jd); 452d22531d5SKirk McKusick WCHK(fs->fs_old_cpc, !=, 0, %jd); 453d22531d5SKirk McKusick WCHK(fs->fs_old_postblformat, !=, 1, %jd); 454f0be378aSKirk McKusick FCHK(fs->fs_old_nrpos, !=, 1, %jd); 455d22531d5SKirk McKusick WCHK(fs->fs_old_spc, !=, fs->fs_fpg * fs->fs_old_nspf, %jd); 456d22531d5SKirk McKusick WCHK(fs->fs_old_nsect, !=, fs->fs_old_spc, %jd); 457d22531d5SKirk McKusick WCHK(fs->fs_old_npsect, !=, fs->fs_old_spc, %jd); 458d22531d5SKirk McKusick FCHK(fs->fs_old_ncyl, !=, fs->fs_ncg, %jd); 459076002f2SKirk McKusick } else { 46050dc4c7dSKirk McKusick /* Bad magic number, so assume not a superblock */ 461076002f2SKirk McKusick return (ENOENT); 462076002f2SKirk McKusick } 463d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd); 464d22531d5SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd); 465d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), %jd); 466d22531d5SKirk McKusick FCHK(powerof2(fs->fs_bsize), ==, 0, %jd); 467d22531d5SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd); 468d22531d5SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd); 469d22531d5SKirk McKusick FCHK(fs->fs_frag, !=, numfrags(fs, fs->fs_bsize), %jd); 470d22531d5SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd); 471d22531d5SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd); 472d22531d5SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd); 473d22531d5SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd); 474d22531d5SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd); 475f0be378aSKirk McKusick FCHK(fs->fs_ipg, <, fs->fs_inopb, %jd); 4768435a9b2SKirk McKusick FCHK((u_int64_t)fs->fs_ipg * fs->fs_ncg, >, 4778435a9b2SKirk McKusick (((int64_t)(1)) << 32) - INOPB(fs), %jd); 478f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, <, 0, %jd); 4798435a9b2SKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, >, (u_int64_t)fs->fs_ipg * fs->fs_ncg, 4808435a9b2SKirk McKusick %jd); 481f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, <, 0, %jd); 482f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, >, 4838435a9b2SKirk McKusick ((u_int64_t)fs->fs_ipg * fs->fs_ncg) - fs->fs_cstotal.cs_nifree, 4848435a9b2SKirk McKusick %jd); 485d22531d5SKirk McKusick FCHK(fs->fs_sbsize, >, SBLOCKSIZE, %jd); 486f0be378aSKirk McKusick FCHK(fs->fs_sbsize, <, (signed)sizeof(struct fs), %jd); 487d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, <, fs->fs_bsize, %jd); 488d22531d5SKirk McKusick FCHK(powerof2(fs->fs_maxbsize), ==, 0, %jd); 489d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, >, FS_MAXCONTIG * fs->fs_bsize, %jd); 490d22531d5SKirk McKusick FCHK(fs->fs_bmask, !=, ~(fs->fs_bsize - 1), %#jx); 491d22531d5SKirk McKusick FCHK(fs->fs_fmask, !=, ~(fs->fs_fsize - 1), %#jx); 492d22531d5SKirk McKusick FCHK(fs->fs_qbmask, !=, ~fs->fs_bmask, %#jx); 493d22531d5SKirk McKusick FCHK(fs->fs_qfmask, !=, ~fs->fs_fmask, %#jx); 494d22531d5SKirk McKusick FCHK(fs->fs_bshift, !=, ILOG2(fs->fs_bsize), %jd); 495d22531d5SKirk McKusick FCHK(fs->fs_fshift, !=, ILOG2(fs->fs_fsize), %jd); 496d22531d5SKirk McKusick FCHK(fs->fs_fragshift, !=, ILOG2(fs->fs_frag), %jd); 497d22531d5SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd); 498d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd); 499d22531d5SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd); 500d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, %jd); 501f0be378aSKirk McKusick /* 502f0be378aSKirk McKusick * If anything has failed up to this point, it is usafe to proceed 503f0be378aSKirk McKusick * as checks below may divide by zero or make other fatal calculations. 504f0be378aSKirk McKusick * So if we have any errors at this point, give up. 505f0be378aSKirk McKusick */ 506f0be378aSKirk McKusick if (error) 507f0be378aSKirk McKusick return (error); 508e15d8f23SKirk McKusick FCHK(fs->fs_sbsize % sectorsize, !=, 0, %jd); 5099dee5da7SKirk McKusick FCHK(fs->fs_ipg % fs->fs_inopb, !=, 0, %jd); 510d22531d5SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup( 51150dc4c7dSKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize), 51250dc4c7dSKirk McKusick fs->fs_frag), %jd); 513d22531d5SKirk McKusick FCHK(fs->fs_cblkno, !=, fs->fs_sblkno + 51450dc4c7dSKirk McKusick roundup(howmany(SBLOCKSIZE, fs->fs_fsize), fs->fs_frag), %jd); 515d22531d5SKirk McKusick FCHK(fs->fs_iblkno, !=, fs->fs_cblkno + fs->fs_frag, %jd); 516d22531d5SKirk McKusick FCHK(fs->fs_dblkno, !=, fs->fs_iblkno + fs->fs_ipg / INOPF(fs), %jd); 517d22531d5SKirk McKusick FCHK(fs->fs_cgsize, >, fs->fs_bsize, %jd); 518f0be378aSKirk McKusick FCHK(fs->fs_cgsize, <, fs->fs_fsize, %jd); 519f0be378aSKirk McKusick FCHK(fs->fs_cgsize % fs->fs_fsize, !=, 0, %jd); 5205bc926afSKirk McKusick /* 5215bc926afSKirk McKusick * This test is valid, however older versions of growfs failed 5225bc926afSKirk McKusick * to correctly update fs_dsize so will fail this test. Thus we 5235bc926afSKirk McKusick * exclude it from the requirements. 5245bc926afSKirk McKusick */ 5255bc926afSKirk McKusick #ifdef notdef 526d22531d5SKirk McKusick WCHK(fs->fs_dsize, !=, fs->fs_size - fs->fs_sblkno - 527076002f2SKirk McKusick fs->fs_ncg * (fs->fs_dblkno - fs->fs_sblkno) - 52850dc4c7dSKirk McKusick howmany(fs->fs_cssize, fs->fs_fsize), %jd); 5295bc926afSKirk McKusick #endif 530d22531d5SKirk McKusick WCHK(fs->fs_metaspace, <, 0, %jd); 531d22531d5SKirk McKusick WCHK(fs->fs_metaspace, >, fs->fs_fpg / 2, %jd); 532d22531d5SKirk McKusick WCHK(fs->fs_minfree, >, 99, %jd%%); 533076002f2SKirk McKusick maxfilesize = fs->fs_bsize * UFS_NDADDR - 1; 534076002f2SKirk McKusick for (sizepb = fs->fs_bsize, i = 0; i < UFS_NIADDR; i++) { 535076002f2SKirk McKusick sizepb *= NINDIR(fs); 536076002f2SKirk McKusick maxfilesize += sizepb; 537076002f2SKirk McKusick } 538d22531d5SKirk McKusick WCHK(fs->fs_maxfilesize, !=, maxfilesize, %jd); 539076002f2SKirk McKusick /* 540076002f2SKirk McKusick * These values have a tight interaction with each other that 541076002f2SKirk McKusick * makes it hard to tightly bound them. So we can only check 542076002f2SKirk McKusick * that they are within a broader possible range. 543076002f2SKirk McKusick * 544f3f5368dSKirk McKusick * The size cannot always be accurately determined, but ensure 545f3f5368dSKirk McKusick * that it is consistent with the number of cylinder groups (fs_ncg) 546f3f5368dSKirk McKusick * and the number of fragments per cylinder group (fs_fpg). Ensure 547f3f5368dSKirk McKusick * that the summary information size is correct and that it starts 548f3f5368dSKirk McKusick * and ends in the data area of the same cylinder group. 549076002f2SKirk McKusick */ 550d22531d5SKirk McKusick FCHK(fs->fs_size, <, 8 * fs->fs_frag, %jd); 551017367c1SKonstantin Belousov FCHK(fs->fs_size, <=, ((int64_t)fs->fs_ncg - 1) * fs->fs_fpg, %jd); 552017367c1SKonstantin Belousov FCHK(fs->fs_size, >, (int64_t)fs->fs_ncg * fs->fs_fpg, %jd); 553b21582eeSKirk McKusick /* 554b21582eeSKirk McKusick * If we are not requested to read in the csum data stop here 555b21582eeSKirk McKusick * as the correctness of the remaining values is only important 556b21582eeSKirk McKusick * to bound the space needed to be allocated to hold the csum data. 557b21582eeSKirk McKusick */ 558b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0) 559b21582eeSKirk McKusick return (error); 560d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, 0, %jd); 561d22531d5SKirk McKusick FCHK(fs->fs_cssize, !=, 562f3f5368dSKirk McKusick fragroundup(fs, fs->fs_ncg * sizeof(struct csum)), %jd); 563d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr), >, fs->fs_ncg, %jd); 564d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, cgdmin(fs, dtog(fs, fs->fs_csaddr)), %jd); 565d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr + howmany(fs->fs_cssize, fs->fs_fsize)), >, 566548045bfSKirk McKusick dtog(fs, fs->fs_csaddr), %jd); 567076002f2SKirk McKusick /* 568bc218d89SKirk McKusick * With file system clustering it is possible to allocate 569bc218d89SKirk McKusick * many contiguous blocks. The kernel variable maxphys defines 570bc218d89SKirk McKusick * the maximum transfer size permitted by the controller and/or 571bc218d89SKirk McKusick * buffering. The fs_maxcontig parameter controls the maximum 572bc218d89SKirk McKusick * number of blocks that the filesystem will read or write 573bc218d89SKirk McKusick * in a single transfer. It is calculated when the filesystem 574bc218d89SKirk McKusick * is created as maxphys / fs_bsize. The loader uses a maxphys 575bc218d89SKirk McKusick * of 128K even when running on a system that supports larger 576bc218d89SKirk McKusick * values. If the filesystem was built on a system that supports 577bc218d89SKirk McKusick * a larger maxphys (1M is typical) it will have configured 578bc218d89SKirk McKusick * fs_maxcontig for that larger system. So we bound the upper 579bc218d89SKirk McKusick * allowable limit for fs_maxconfig to be able to at least 580bc218d89SKirk McKusick * work with a 1M maxphys on the smallest block size filesystem: 581bc218d89SKirk McKusick * 1M / 4096 == 256. There is no harm in allowing the mounting of 582bc218d89SKirk McKusick * filesystems that make larger than maxphys I/O requests because 583bc218d89SKirk McKusick * those (mostly 32-bit machines) can (very slowly) handle I/O 584bc218d89SKirk McKusick * requests that exceed maxphys. 585076002f2SKirk McKusick */ 586d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, <, 0, %jd); 587d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, >, MAX(256, maxphys / fs->fs_bsize), %jd); 588f0be378aSKirk McKusick FCHK2(fs->fs_maxcontig, ==, 0, fs->fs_contigsumsize, !=, 0, %jd); 589f0be378aSKirk McKusick FCHK2(fs->fs_maxcontig, >, 1, fs->fs_contigsumsize, !=, 59050dc4c7dSKirk McKusick MIN(fs->fs_maxcontig, FS_MAXCONTIG), %jd); 591b21582eeSKirk McKusick return (error); 592076002f2SKirk McKusick } 593076002f2SKirk McKusick 594076002f2SKirk McKusick /* 595e6886616SKirk McKusick * Make an extensive search to find a superblock. If the superblock 596e6886616SKirk McKusick * in the standard place cannot be used, try looking for one of the 597e6886616SKirk McKusick * backup superblocks. 598e6886616SKirk McKusick * 599e6886616SKirk McKusick * Flags are made up of the following or'ed together options: 600e6886616SKirk McKusick * 601e6886616SKirk McKusick * UFS_NOMSG indicates that superblock inconsistency error messages 602e6886616SKirk McKusick * should not be printed. 603e6886616SKirk McKusick * 604e6886616SKirk McKusick * UFS_NOCSUM causes only the superblock itself to be returned, but does 605e6886616SKirk McKusick * not read in any auxillary data structures like the cylinder group 606e6886616SKirk McKusick * summary information. 607e6886616SKirk McKusick */ 608e6886616SKirk McKusick int 609e6886616SKirk McKusick ffs_sbsearch(void *devfd, struct fs **fsp, int reqflags, 610e6886616SKirk McKusick struct malloc_type *filltype, 611e6886616SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 612e6886616SKirk McKusick { 613e6886616SKirk McKusick struct fsrecovery *fsr; 614e6886616SKirk McKusick struct fs *protofs; 615e6886616SKirk McKusick void *fsrbuf; 616e6886616SKirk McKusick char *cp; 617e6886616SKirk McKusick long nocsum, flags, msg, cg; 618e6886616SKirk McKusick off_t sblk, secsize; 619e6886616SKirk McKusick int error; 620e6886616SKirk McKusick 621e6886616SKirk McKusick msg = (reqflags & UFS_NOMSG) == 0; 622e6886616SKirk McKusick nocsum = reqflags & UFS_NOCSUM; 623e6886616SKirk McKusick /* 624e6886616SKirk McKusick * Try normal superblock read and return it if it works. 625e6886616SKirk McKusick * 626e6886616SKirk McKusick * Suppress messages if it fails until we find out if 627e6886616SKirk McKusick * failure can be avoided. 628e6886616SKirk McKusick */ 629e6886616SKirk McKusick flags = UFS_NOMSG | nocsum; 630e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) == 0) 631e6886616SKirk McKusick return (0); 632e6886616SKirk McKusick /* 633e6886616SKirk McKusick * First try: ignoring hash failures. 634e6886616SKirk McKusick */ 635e6886616SKirk McKusick flags |= UFS_NOHASHFAIL; 636e6886616SKirk McKusick if (msg) 637e6886616SKirk McKusick flags &= ~UFS_NOMSG; 638e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) == 0) 639e6886616SKirk McKusick return (0); 640e6886616SKirk McKusick /* 641e6886616SKirk McKusick * Next up is to check if fields of the superblock that are 642e6886616SKirk McKusick * needed to find backup superblocks are usable. 643e6886616SKirk McKusick */ 644e6886616SKirk McKusick if (msg) 645e6886616SKirk McKusick printf("Attempted recovery for standard superblock: failed\n"); 646e6886616SKirk McKusick flags = UFS_FSRONLY | UFS_NOHASHFAIL | UFS_NOMSG; 647e6886616SKirk McKusick if (ffs_sbget(devfd, &protofs, UFS_STDSB, flags, filltype, 648e6886616SKirk McKusick readfunc) == 0) { 649e6886616SKirk McKusick if (msg) 650f0be378aSKirk McKusick printf("Attempt extraction of recovery data from " 651f0be378aSKirk McKusick "standard superblock.\n"); 652e6886616SKirk McKusick } else { 653e6886616SKirk McKusick /* 654e6886616SKirk McKusick * Final desperation is to see if alternate superblock 655e6886616SKirk McKusick * parameters have been saved in the boot area. 656e6886616SKirk McKusick */ 657e6886616SKirk McKusick if (msg) 658e6886616SKirk McKusick printf("Attempted extraction of recovery data from " 659e6886616SKirk McKusick "standard superblock: failed\nAttempt to find " 660f0be378aSKirk McKusick "boot zone recovery data.\n"); 661e6886616SKirk McKusick /* 662e6886616SKirk McKusick * Look to see if recovery information has been saved. 663e6886616SKirk McKusick * If so we can generate a prototype superblock based 664e6886616SKirk McKusick * on that information. 665e6886616SKirk McKusick * 666e6886616SKirk McKusick * We need fragments-per-group, number of cylinder groups, 667e6886616SKirk McKusick * location of the superblock within the cylinder group, and 668e6886616SKirk McKusick * the conversion from filesystem fragments to disk blocks. 669e6886616SKirk McKusick * 670e6886616SKirk McKusick * When building a UFS2 filesystem, newfs(8) stores these 671e6886616SKirk McKusick * details at the end of the boot block area at the start 672e6886616SKirk McKusick * of the filesystem partition. If they have been overwritten 673e6886616SKirk McKusick * by a boot block, we fail. But usually they are there 674e6886616SKirk McKusick * and we can use them. 675e6886616SKirk McKusick * 676e6886616SKirk McKusick * We could ask the underlying device for its sector size, 677e6886616SKirk McKusick * but some devices lie. So we just try a plausible range. 678e6886616SKirk McKusick */ 679e6886616SKirk McKusick error = ENOENT; 680e6886616SKirk McKusick for (secsize = dbtob(1); secsize <= SBLOCKSIZE; secsize *= 2) 681e6886616SKirk McKusick if ((error = (*readfunc)(devfd, (SBLOCK_UFS2 - secsize), 682e6886616SKirk McKusick &fsrbuf, secsize)) == 0) 683e6886616SKirk McKusick break; 684e6886616SKirk McKusick if (error != 0) 685e6886616SKirk McKusick goto trynowarn; 686e6886616SKirk McKusick cp = fsrbuf; /* type change to keep compiler happy */ 687e6886616SKirk McKusick fsr = (struct fsrecovery *)&cp[secsize - sizeof *fsr]; 688e6886616SKirk McKusick if (fsr->fsr_magic != FS_UFS2_MAGIC || 689e6886616SKirk McKusick (protofs = UFS_MALLOC(SBLOCKSIZE, filltype, M_NOWAIT)) 690e6886616SKirk McKusick == NULL) { 691e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype); 692e6886616SKirk McKusick goto trynowarn; 693e6886616SKirk McKusick } 694e6886616SKirk McKusick memset(protofs, 0, sizeof(struct fs)); 695e6886616SKirk McKusick protofs->fs_fpg = fsr->fsr_fpg; 696e6886616SKirk McKusick protofs->fs_fsbtodb = fsr->fsr_fsbtodb; 697e6886616SKirk McKusick protofs->fs_sblkno = fsr->fsr_sblkno; 698e6886616SKirk McKusick protofs->fs_magic = fsr->fsr_magic; 699e6886616SKirk McKusick protofs->fs_ncg = fsr->fsr_ncg; 700e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype); 701e6886616SKirk McKusick } 702e6886616SKirk McKusick /* 703e6886616SKirk McKusick * Scan looking for alternative superblocks. 704e6886616SKirk McKusick */ 705f0be378aSKirk McKusick flags = nocsum; 706f0be378aSKirk McKusick if (!msg) 707f0be378aSKirk McKusick flags |= UFS_NOMSG; 708e6886616SKirk McKusick for (cg = 0; cg < protofs->fs_ncg; cg++) { 709f0be378aSKirk McKusick sblk = fsbtodb(protofs, cgsblock(protofs, cg)); 710f0be378aSKirk McKusick if (msg) 711f0be378aSKirk McKusick printf("Try cg %ld at sblock loc %jd\n", cg, 712f0be378aSKirk McKusick (intmax_t)sblk); 713f0be378aSKirk McKusick if (ffs_sbget(devfd, fsp, dbtob(sblk), flags, filltype, 714e6886616SKirk McKusick readfunc) == 0) { 715e6886616SKirk McKusick if (msg) 716f0be378aSKirk McKusick printf("Succeeded with alternate superblock " 717f0be378aSKirk McKusick "at %jd\n", (intmax_t)sblk); 718e6886616SKirk McKusick UFS_FREE(protofs, filltype); 719e6886616SKirk McKusick return (0); 720e6886616SKirk McKusick } 721e6886616SKirk McKusick } 722e6886616SKirk McKusick UFS_FREE(protofs, filltype); 723e6886616SKirk McKusick /* 724e6886616SKirk McKusick * Our alternate superblock strategies failed. Our last ditch effort 725e6886616SKirk McKusick * is to see if the standard superblock has only non-critical errors. 726e6886616SKirk McKusick */ 727e6886616SKirk McKusick trynowarn: 728e6886616SKirk McKusick flags = UFS_NOWARNFAIL | UFS_NOMSG | nocsum; 729e6886616SKirk McKusick if (msg) { 730f0be378aSKirk McKusick printf("Finding an alternate superblock failed.\nCheck for " 731f0be378aSKirk McKusick "only non-critical errors in standard superblock\n"); 732e6886616SKirk McKusick flags &= ~UFS_NOMSG; 733e6886616SKirk McKusick } 734f0be378aSKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) != 0) { 735e6886616SKirk McKusick if (msg) 736f0be378aSKirk McKusick printf("Failed, superblock has critical errors\n"); 737f0be378aSKirk McKusick return (ENOENT); 738f0be378aSKirk McKusick } 739f0be378aSKirk McKusick if (msg) 740f0be378aSKirk McKusick printf("Success, using standard superblock with " 741f0be378aSKirk McKusick "non-critical errors.\n"); 742e6886616SKirk McKusick return (0); 743e6886616SKirk McKusick } 744e6886616SKirk McKusick 745e6886616SKirk McKusick /* 746dffce215SKirk McKusick * Write a superblock to the devfd device from the memory pointed to by fs. 747dffce215SKirk McKusick * Write out the superblock summary information if it is present. 748dffce215SKirk McKusick * 749dffce215SKirk McKusick * If the write is successful, zero is returned. Otherwise one of the 750dffce215SKirk McKusick * following error values is returned: 751dffce215SKirk McKusick * EIO: failed to write superblock. 752dffce215SKirk McKusick * EIO: failed to write superblock summary information. 753dffce215SKirk McKusick */ 754dffce215SKirk McKusick int 755dffce215SKirk McKusick ffs_sbput(void *devfd, struct fs *fs, off_t loc, 756dffce215SKirk McKusick int (*writefunc)(void *devfd, off_t loc, void *buf, int size)) 757dffce215SKirk McKusick { 758dffce215SKirk McKusick int i, error, blks, size; 759dffce215SKirk McKusick uint8_t *space; 760dffce215SKirk McKusick 761dffce215SKirk McKusick /* 762dffce215SKirk McKusick * If there is summary information, write it first, so if there 763dffce215SKirk McKusick * is an error, the superblock will not be marked as clean. 764dffce215SKirk McKusick */ 76534816cb9SKirk McKusick if (fs->fs_si != NULL && fs->fs_csp != NULL) { 766dffce215SKirk McKusick blks = howmany(fs->fs_cssize, fs->fs_fsize); 767dffce215SKirk McKusick space = (uint8_t *)fs->fs_csp; 768dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) { 769dffce215SKirk McKusick size = fs->fs_bsize; 770dffce215SKirk McKusick if (i + fs->fs_frag > blks) 771dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize; 772dffce215SKirk McKusick if ((error = (*writefunc)(devfd, 773dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)), 774dffce215SKirk McKusick space, size)) != 0) 775dffce215SKirk McKusick return (error); 776dffce215SKirk McKusick space += size; 777dffce215SKirk McKusick } 778dffce215SKirk McKusick } 779dffce215SKirk McKusick fs->fs_fmod = 0; 78093440bbeSKirk McKusick #ifndef _KERNEL 78193440bbeSKirk McKusick { 78293440bbeSKirk McKusick struct fs_summary_info *fs_si; 78393440bbeSKirk McKusick 78493440bbeSKirk McKusick fs->fs_time = time(NULL); 78593440bbeSKirk McKusick /* Clear the pointers for the duration of writing. */ 78693440bbeSKirk McKusick fs_si = fs->fs_si; 78793440bbeSKirk McKusick fs->fs_si = NULL; 788ade67b50SKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs); 78993440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); 79093440bbeSKirk McKusick fs->fs_si = fs_si; 79193440bbeSKirk McKusick } 79293440bbeSKirk McKusick #else /* _KERNEL */ 79393440bbeSKirk McKusick fs->fs_time = time_second; 79493440bbeSKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs); 79593440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); 79693440bbeSKirk McKusick #endif /* _KERNEL */ 797dffce215SKirk McKusick return (error); 798dffce215SKirk McKusick } 799dffce215SKirk McKusick 800dffce215SKirk McKusick /* 801ec888383SKirk McKusick * Calculate the check-hash for a superblock. 802ec888383SKirk McKusick */ 803ade67b50SKirk McKusick uint32_t 804ade67b50SKirk McKusick ffs_calc_sbhash(struct fs *fs) 805ec888383SKirk McKusick { 806ec888383SKirk McKusick uint32_t ckhash, save_ckhash; 807ec888383SKirk McKusick 808ec888383SKirk McKusick /* 809ec888383SKirk McKusick * A filesystem that was using a superblock ckhash may be moved 810ec888383SKirk McKusick * to an older kernel that does not support ckhashes. The 811ec888383SKirk McKusick * older kernel will clear the FS_METACKHASH flag indicating 812ec888383SKirk McKusick * that it does not update hashes. When the disk is moved back 813ec888383SKirk McKusick * to a kernel capable of ckhashes it disables them on mount: 814ec888383SKirk McKusick * 815ec888383SKirk McKusick * if ((fs->fs_flags & FS_METACKHASH) == 0) 816ec888383SKirk McKusick * fs->fs_metackhash = 0; 817ec888383SKirk McKusick * 818ec888383SKirk McKusick * This leaves (fs->fs_metackhash & CK_SUPERBLOCK) == 0) with an 819ec888383SKirk McKusick * old stale value in the fs->fs_ckhash field. Thus the need to 820ec888383SKirk McKusick * just accept what is there. 821ec888383SKirk McKusick */ 822ec888383SKirk McKusick if ((fs->fs_metackhash & CK_SUPERBLOCK) == 0) 823ec888383SKirk McKusick return (fs->fs_ckhash); 824ec888383SKirk McKusick 825ec888383SKirk McKusick save_ckhash = fs->fs_ckhash; 826ec888383SKirk McKusick fs->fs_ckhash = 0; 827ec888383SKirk McKusick /* 828ec888383SKirk McKusick * If newly read from disk, the caller is responsible for 829ec888383SKirk McKusick * verifying that fs->fs_sbsize <= SBLOCKSIZE. 830ec888383SKirk McKusick */ 831ec888383SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)fs, fs->fs_sbsize); 832ec888383SKirk McKusick fs->fs_ckhash = save_ckhash; 833ec888383SKirk McKusick return (ckhash); 834ec888383SKirk McKusick } 835ec888383SKirk McKusick 836ec888383SKirk McKusick /* 837df8bae1dSRodney W. Grimes * Update the frsum fields to reflect addition or deletion 838df8bae1dSRodney W. Grimes * of some frags. 839df8bae1dSRodney W. Grimes */ 840df8bae1dSRodney W. Grimes void 84115c377c3SEd Maste ffs_fragacct(struct fs *fs, int fragmap, int32_t fraglist[], int cnt) 842df8bae1dSRodney W. Grimes { 843df8bae1dSRodney W. Grimes int inblk; 84405f4ff5dSPoul-Henning Kamp int field, subfield; 84505f4ff5dSPoul-Henning Kamp int siz, pos; 846df8bae1dSRodney W. Grimes 847df8bae1dSRodney W. Grimes inblk = (int)(fragtbl[fs->fs_frag][fragmap]) << 1; 848df8bae1dSRodney W. Grimes fragmap <<= 1; 849df8bae1dSRodney W. Grimes for (siz = 1; siz < fs->fs_frag; siz++) { 850df8bae1dSRodney W. Grimes if ((inblk & (1 << (siz + (fs->fs_frag % NBBY)))) == 0) 851df8bae1dSRodney W. Grimes continue; 852df8bae1dSRodney W. Grimes field = around[siz]; 853df8bae1dSRodney W. Grimes subfield = inside[siz]; 854df8bae1dSRodney W. Grimes for (pos = siz; pos <= fs->fs_frag; pos++) { 855df8bae1dSRodney W. Grimes if ((fragmap & field) == subfield) { 856df8bae1dSRodney W. Grimes fraglist[siz] += cnt; 857df8bae1dSRodney W. Grimes pos += siz; 858df8bae1dSRodney W. Grimes field <<= siz; 859df8bae1dSRodney W. Grimes subfield <<= siz; 860df8bae1dSRodney W. Grimes } 861df8bae1dSRodney W. Grimes field <<= 1; 862df8bae1dSRodney W. Grimes subfield <<= 1; 863df8bae1dSRodney W. Grimes } 864df8bae1dSRodney W. Grimes } 865df8bae1dSRodney W. Grimes } 866df8bae1dSRodney W. Grimes 867df8bae1dSRodney W. Grimes /* 868df8bae1dSRodney W. Grimes * block operations 869df8bae1dSRodney W. Grimes * 870df8bae1dSRodney W. Grimes * check if a block is available 871df8bae1dSRodney W. Grimes */ 872df8bae1dSRodney W. Grimes int 87315c377c3SEd Maste ffs_isblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) 874df8bae1dSRodney W. Grimes { 875df8bae1dSRodney W. Grimes unsigned char mask; 876df8bae1dSRodney W. Grimes 877df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 878df8bae1dSRodney W. Grimes case 8: 879df8bae1dSRodney W. Grimes return (cp[h] == 0xff); 880df8bae1dSRodney W. Grimes case 4: 881df8bae1dSRodney W. Grimes mask = 0x0f << ((h & 0x1) << 2); 882df8bae1dSRodney W. Grimes return ((cp[h >> 1] & mask) == mask); 883df8bae1dSRodney W. Grimes case 2: 884df8bae1dSRodney W. Grimes mask = 0x03 << ((h & 0x3) << 1); 885df8bae1dSRodney W. Grimes return ((cp[h >> 2] & mask) == mask); 886df8bae1dSRodney W. Grimes case 1: 887df8bae1dSRodney W. Grimes mask = 0x01 << (h & 0x7); 888df8bae1dSRodney W. Grimes return ((cp[h >> 3] & mask) == mask); 889df8bae1dSRodney W. Grimes default: 890113db2ddSJeff Roberson #ifdef _KERNEL 891df8bae1dSRodney W. Grimes panic("ffs_isblock"); 892113db2ddSJeff Roberson #endif 893113db2ddSJeff Roberson break; 894113db2ddSJeff Roberson } 895113db2ddSJeff Roberson return (0); 896113db2ddSJeff Roberson } 897113db2ddSJeff Roberson 898113db2ddSJeff Roberson /* 899113db2ddSJeff Roberson * check if a block is free 900113db2ddSJeff Roberson */ 901113db2ddSJeff Roberson int 90215c377c3SEd Maste ffs_isfreeblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) 903113db2ddSJeff Roberson { 904113db2ddSJeff Roberson 905113db2ddSJeff Roberson switch ((int)fs->fs_frag) { 906113db2ddSJeff Roberson case 8: 907113db2ddSJeff Roberson return (cp[h] == 0); 908113db2ddSJeff Roberson case 4: 909113db2ddSJeff Roberson return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0); 910113db2ddSJeff Roberson case 2: 911113db2ddSJeff Roberson return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0); 912113db2ddSJeff Roberson case 1: 913113db2ddSJeff Roberson return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0); 914113db2ddSJeff Roberson default: 915113db2ddSJeff Roberson #ifdef _KERNEL 916113db2ddSJeff Roberson panic("ffs_isfreeblock"); 917113db2ddSJeff Roberson #endif 918113db2ddSJeff Roberson break; 919df8bae1dSRodney W. Grimes } 920589c7af9SKirk McKusick return (0); 921df8bae1dSRodney W. Grimes } 922df8bae1dSRodney W. Grimes 923df8bae1dSRodney W. Grimes /* 924df8bae1dSRodney W. Grimes * take a block out of the map 925df8bae1dSRodney W. Grimes */ 926df8bae1dSRodney W. Grimes void 92715c377c3SEd Maste ffs_clrblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) 928df8bae1dSRodney W. Grimes { 929df8bae1dSRodney W. Grimes 930df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 931df8bae1dSRodney W. Grimes case 8: 932df8bae1dSRodney W. Grimes cp[h] = 0; 933df8bae1dSRodney W. Grimes return; 934df8bae1dSRodney W. Grimes case 4: 935df8bae1dSRodney W. Grimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 936df8bae1dSRodney W. Grimes return; 937df8bae1dSRodney W. Grimes case 2: 938df8bae1dSRodney W. Grimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 939df8bae1dSRodney W. Grimes return; 940df8bae1dSRodney W. Grimes case 1: 941df8bae1dSRodney W. Grimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 942df8bae1dSRodney W. Grimes return; 943df8bae1dSRodney W. Grimes default: 944113db2ddSJeff Roberson #ifdef _KERNEL 945df8bae1dSRodney W. Grimes panic("ffs_clrblock"); 946113db2ddSJeff Roberson #endif 947113db2ddSJeff Roberson break; 948df8bae1dSRodney W. Grimes } 949df8bae1dSRodney W. Grimes } 950df8bae1dSRodney W. Grimes 951df8bae1dSRodney W. Grimes /* 952df8bae1dSRodney W. Grimes * put a block into the map 953df8bae1dSRodney W. Grimes */ 954df8bae1dSRodney W. Grimes void 95515c377c3SEd Maste ffs_setblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) 956df8bae1dSRodney W. Grimes { 957df8bae1dSRodney W. Grimes 958df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 959df8bae1dSRodney W. Grimes case 8: 960df8bae1dSRodney W. Grimes cp[h] = 0xff; 961df8bae1dSRodney W. Grimes return; 962df8bae1dSRodney W. Grimes case 4: 963df8bae1dSRodney W. Grimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 964df8bae1dSRodney W. Grimes return; 965df8bae1dSRodney W. Grimes case 2: 966df8bae1dSRodney W. Grimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 967df8bae1dSRodney W. Grimes return; 968df8bae1dSRodney W. Grimes case 1: 969df8bae1dSRodney W. Grimes cp[h >> 3] |= (0x01 << (h & 0x7)); 970df8bae1dSRodney W. Grimes return; 971df8bae1dSRodney W. Grimes default: 972113db2ddSJeff Roberson #ifdef _KERNEL 973df8bae1dSRodney W. Grimes panic("ffs_setblock"); 974113db2ddSJeff Roberson #endif 975113db2ddSJeff Roberson break; 976df8bae1dSRodney W. Grimes } 977df8bae1dSRodney W. Grimes } 978113db2ddSJeff Roberson 979113db2ddSJeff Roberson /* 980113db2ddSJeff Roberson * Update the cluster map because of an allocation or free. 981113db2ddSJeff Roberson * 982113db2ddSJeff Roberson * Cnt == 1 means free; cnt == -1 means allocating. 983113db2ddSJeff Roberson */ 984113db2ddSJeff Roberson void 98515c377c3SEd Maste ffs_clusteracct(struct fs *fs, struct cg *cgp, ufs1_daddr_t blkno, int cnt) 986113db2ddSJeff Roberson { 987113db2ddSJeff Roberson int32_t *sump; 988113db2ddSJeff Roberson int32_t *lp; 989113db2ddSJeff Roberson u_char *freemapp, *mapp; 990e1c27cf7SKirk McKusick int i, start, end, forw, back, map; 991e1c27cf7SKirk McKusick u_int bit; 992113db2ddSJeff Roberson 993113db2ddSJeff Roberson if (fs->fs_contigsumsize <= 0) 994113db2ddSJeff Roberson return; 995113db2ddSJeff Roberson freemapp = cg_clustersfree(cgp); 996113db2ddSJeff Roberson sump = cg_clustersum(cgp); 997113db2ddSJeff Roberson /* 998113db2ddSJeff Roberson * Allocate or clear the actual block. 999113db2ddSJeff Roberson */ 1000113db2ddSJeff Roberson if (cnt > 0) 1001113db2ddSJeff Roberson setbit(freemapp, blkno); 1002113db2ddSJeff Roberson else 1003113db2ddSJeff Roberson clrbit(freemapp, blkno); 1004113db2ddSJeff Roberson /* 1005113db2ddSJeff Roberson * Find the size of the cluster going forward. 1006113db2ddSJeff Roberson */ 1007113db2ddSJeff Roberson start = blkno + 1; 1008113db2ddSJeff Roberson end = start + fs->fs_contigsumsize; 1009113db2ddSJeff Roberson if (end >= cgp->cg_nclusterblks) 1010113db2ddSJeff Roberson end = cgp->cg_nclusterblks; 1011113db2ddSJeff Roberson mapp = &freemapp[start / NBBY]; 1012113db2ddSJeff Roberson map = *mapp++; 1013e1c27cf7SKirk McKusick bit = 1U << (start % NBBY); 1014113db2ddSJeff Roberson for (i = start; i < end; i++) { 1015113db2ddSJeff Roberson if ((map & bit) == 0) 1016113db2ddSJeff Roberson break; 1017113db2ddSJeff Roberson if ((i & (NBBY - 1)) != (NBBY - 1)) { 1018113db2ddSJeff Roberson bit <<= 1; 1019113db2ddSJeff Roberson } else { 1020113db2ddSJeff Roberson map = *mapp++; 1021113db2ddSJeff Roberson bit = 1; 1022113db2ddSJeff Roberson } 1023113db2ddSJeff Roberson } 1024113db2ddSJeff Roberson forw = i - start; 1025113db2ddSJeff Roberson /* 1026113db2ddSJeff Roberson * Find the size of the cluster going backward. 1027113db2ddSJeff Roberson */ 1028113db2ddSJeff Roberson start = blkno - 1; 1029113db2ddSJeff Roberson end = start - fs->fs_contigsumsize; 1030113db2ddSJeff Roberson if (end < 0) 1031113db2ddSJeff Roberson end = -1; 1032113db2ddSJeff Roberson mapp = &freemapp[start / NBBY]; 1033113db2ddSJeff Roberson map = *mapp--; 1034e1c27cf7SKirk McKusick bit = 1U << (start % NBBY); 1035113db2ddSJeff Roberson for (i = start; i > end; i--) { 1036113db2ddSJeff Roberson if ((map & bit) == 0) 1037113db2ddSJeff Roberson break; 1038113db2ddSJeff Roberson if ((i & (NBBY - 1)) != 0) { 1039113db2ddSJeff Roberson bit >>= 1; 1040113db2ddSJeff Roberson } else { 1041113db2ddSJeff Roberson map = *mapp--; 1042e1c27cf7SKirk McKusick bit = 1U << (NBBY - 1); 1043113db2ddSJeff Roberson } 1044113db2ddSJeff Roberson } 1045113db2ddSJeff Roberson back = start - i; 1046113db2ddSJeff Roberson /* 1047113db2ddSJeff Roberson * Account for old cluster and the possibly new forward and 1048113db2ddSJeff Roberson * back clusters. 1049113db2ddSJeff Roberson */ 1050113db2ddSJeff Roberson i = back + forw + 1; 1051113db2ddSJeff Roberson if (i > fs->fs_contigsumsize) 1052113db2ddSJeff Roberson i = fs->fs_contigsumsize; 1053113db2ddSJeff Roberson sump[i] += cnt; 1054113db2ddSJeff Roberson if (back > 0) 1055113db2ddSJeff Roberson sump[back] -= cnt; 1056113db2ddSJeff Roberson if (forw > 0) 1057113db2ddSJeff Roberson sump[forw] -= cnt; 1058113db2ddSJeff Roberson /* 1059113db2ddSJeff Roberson * Update cluster summary information. 1060113db2ddSJeff Roberson */ 1061113db2ddSJeff Roberson lp = &sump[fs->fs_contigsumsize]; 1062113db2ddSJeff Roberson for (i = fs->fs_contigsumsize; i > 0; i--) 1063113db2ddSJeff Roberson if (*lp-- > 0) 1064113db2ddSJeff Roberson break; 1065113db2ddSJeff Roberson fs->fs_maxcluster[cgp->cg_cgx] = i; 1066113db2ddSJeff Roberson } 1067