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> 38b13110e9SAlfredo Dal'Ava Junior #include <sys/endian.h> 39076002f2SKirk McKusick #include <sys/limits.h> 40df8bae1dSRodney W. Grimes 41c4473420SPeter Wemm #ifndef _KERNEL 42dffce215SKirk McKusick #include <stdio.h> 43dffce215SKirk McKusick #include <string.h> 44dffce215SKirk McKusick #include <stdlib.h> 45dffce215SKirk McKusick #include <time.h> 46dffce215SKirk McKusick #include <sys/errno.h> 47996c772fSJohn Dyson #include <ufs/ufs/dinode.h> 481c85e6a3SKirk McKusick #include <ufs/ffs/fs.h> 49dffce215SKirk McKusick 50ec888383SKirk McKusick uint32_t calculate_crc32c(uint32_t, const void *, size_t); 51ade67b50SKirk McKusick uint32_t ffs_calc_sbhash(struct fs *); 52dffce215SKirk McKusick struct malloc_type; 53dffce215SKirk McKusick #define UFS_MALLOC(size, type, flags) malloc(size) 54dffce215SKirk McKusick #define UFS_FREE(ptr, type) free(ptr) 55076002f2SKirk McKusick #define maxphys MAXPHYS 56dffce215SKirk McKusick 57dffce215SKirk McKusick #else /* _KERNEL */ 58df8bae1dSRodney W. Grimes #include <sys/systm.h> 59f89d2072SXin LI #include <sys/gsb_crc32.h> 601cd52ec3SBruce Evans #include <sys/lock.h> 611c85e6a3SKirk McKusick #include <sys/malloc.h> 621c85e6a3SKirk McKusick #include <sys/mount.h> 63df8bae1dSRodney W. Grimes #include <sys/vnode.h> 649626b608SPoul-Henning Kamp #include <sys/bio.h> 65df8bae1dSRodney W. Grimes #include <sys/buf.h> 6608637435SBruce Evans #include <sys/ucred.h> 6708637435SBruce Evans 68df8bae1dSRodney W. Grimes #include <ufs/ufs/quota.h> 69df8bae1dSRodney W. Grimes #include <ufs/ufs/inode.h> 701c85e6a3SKirk McKusick #include <ufs/ufs/extattr.h> 711c85e6a3SKirk McKusick #include <ufs/ufs/ufsmount.h> 721c85e6a3SKirk McKusick #include <ufs/ufs/ufs_extern.h> 73996c772fSJohn Dyson #include <ufs/ffs/ffs_extern.h> 741c85e6a3SKirk McKusick #include <ufs/ffs/fs.h> 75df8bae1dSRodney W. Grimes 76dffce215SKirk McKusick #define UFS_MALLOC(size, type, flags) malloc(size, type, flags) 77dffce215SKirk McKusick #define UFS_FREE(ptr, type) free(ptr, type) 78dffce215SKirk McKusick 79fb14e73cSKirk McKusick #endif /* _KERNEL */ 80df8bae1dSRodney W. Grimes 81df8bae1dSRodney W. Grimes /* 828f829a5cSKirk McKusick * Verify an inode check-hash. 838f829a5cSKirk McKusick */ 848f829a5cSKirk McKusick int 858f829a5cSKirk McKusick ffs_verify_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip) 868f829a5cSKirk McKusick { 87c8f55fc4SKirk McKusick uint32_t ckhash, save_ckhash; 888f829a5cSKirk McKusick 898f829a5cSKirk McKusick /* 908f829a5cSKirk McKusick * Return success if unallocated or we are not doing inode check-hash. 918f829a5cSKirk McKusick */ 928f829a5cSKirk McKusick if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0) 938f829a5cSKirk McKusick return (0); 948f829a5cSKirk McKusick /* 958f829a5cSKirk McKusick * Exclude di_ckhash from the crc32 calculation, e.g., always use 968f829a5cSKirk McKusick * a check-hash value of zero when calculating the check-hash. 978f829a5cSKirk McKusick */ 988f829a5cSKirk McKusick save_ckhash = dip->di_ckhash; 998f829a5cSKirk McKusick dip->di_ckhash = 0; 100c8f55fc4SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip)); 1018f829a5cSKirk McKusick dip->di_ckhash = save_ckhash; 102c8f55fc4SKirk McKusick if (save_ckhash == ckhash) 1038f829a5cSKirk McKusick return (0); 104c8f55fc4SKirk McKusick return (EINVAL); 1058f829a5cSKirk McKusick } 1068f829a5cSKirk McKusick 1078f829a5cSKirk McKusick /* 1088f829a5cSKirk McKusick * Update an inode check-hash. 1098f829a5cSKirk McKusick */ 1108f829a5cSKirk McKusick void 1118f829a5cSKirk McKusick ffs_update_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip) 1128f829a5cSKirk McKusick { 1138f829a5cSKirk McKusick 1148f829a5cSKirk McKusick if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0) 1158f829a5cSKirk McKusick return; 1168f829a5cSKirk McKusick /* 1178f829a5cSKirk McKusick * Exclude old di_ckhash from the crc32 calculation, e.g., always use 1188f829a5cSKirk McKusick * a check-hash value of zero when calculating the new check-hash. 1198f829a5cSKirk McKusick */ 1208f829a5cSKirk McKusick dip->di_ckhash = 0; 1218f829a5cSKirk McKusick dip->di_ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip)); 1228f829a5cSKirk McKusick } 1238f829a5cSKirk McKusick 1248f829a5cSKirk McKusick /* 125dffce215SKirk McKusick * These are the low-level functions that actually read and write 126dffce215SKirk McKusick * the superblock and its associated data. 127dffce215SKirk McKusick */ 128dffce215SKirk McKusick static off_t sblock_try[] = SBLOCKSEARCH; 129b21582eeSKirk McKusick static int readsuper(void *, struct fs **, off_t, int, 130dffce215SKirk McKusick int (*)(void *, off_t, void **, int)); 131076002f2SKirk McKusick static int validate_sblock(struct fs *, int); 132dffce215SKirk McKusick 133dffce215SKirk McKusick /* 134dffce215SKirk McKusick * Read a superblock from the devfd device. 135dffce215SKirk McKusick * 136dffce215SKirk McKusick * If an alternate superblock is specified, it is read. Otherwise the 137dffce215SKirk McKusick * set of locations given in the SBLOCKSEARCH list is searched for a 138dffce215SKirk McKusick * superblock. Memory is allocated for the superblock by the readfunc and 139dffce215SKirk McKusick * is returned. If filltype is non-NULL, additional memory is allocated 140dffce215SKirk McKusick * of type filltype and filled in with the superblock summary information. 141efbf3964SKirk McKusick * All memory is freed when any error is returned. 142dffce215SKirk McKusick * 143dffce215SKirk McKusick * If a superblock is found, zero is returned. Otherwise one of the 144dffce215SKirk McKusick * following error values is returned: 145dffce215SKirk McKusick * EIO: non-existent or truncated superblock. 146dffce215SKirk McKusick * EIO: error reading summary information. 147dffce215SKirk McKusick * ENOENT: no usable known superblock found. 148b13110e9SAlfredo Dal'Ava Junior * EILSEQ: filesystem with wrong byte order found. 149076002f2SKirk McKusick * ENOMEM: failed to allocate space for the superblock. 150dffce215SKirk McKusick * EINVAL: The previous newfs operation on this volume did not complete. 151dffce215SKirk McKusick * The administrator must complete newfs before using this volume. 152dffce215SKirk McKusick */ 153dffce215SKirk McKusick int 154b21582eeSKirk McKusick ffs_sbget(void *devfd, struct fs **fsp, off_t sblock, int flags, 155dffce215SKirk McKusick struct malloc_type *filltype, 156dffce215SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 157dffce215SKirk McKusick { 158dffce215SKirk McKusick struct fs *fs; 15934816cb9SKirk McKusick struct fs_summary_info *fs_si; 160076002f2SKirk McKusick int i, error; 161076002f2SKirk McKusick uint64_t size, blks; 162dffce215SKirk McKusick uint8_t *space; 163dffce215SKirk McKusick int32_t *lp; 164dffce215SKirk McKusick char *buf; 165dffce215SKirk McKusick 166efbf3964SKirk McKusick fs = NULL; 16716759360SMark Johnston *fsp = NULL; 168b21582eeSKirk McKusick if (sblock != UFS_STDSB) { 169b21582eeSKirk McKusick if ((error = readsuper(devfd, &fs, sblock, 170b21582eeSKirk McKusick flags | UFS_ALTSBLK, readfunc)) != 0) { 171efbf3964SKirk McKusick if (fs != NULL) 172efbf3964SKirk McKusick UFS_FREE(fs, filltype); 1734cbd996aSKirk McKusick return (error); 174efbf3964SKirk McKusick } 175dffce215SKirk McKusick } else { 176dffce215SKirk McKusick for (i = 0; sblock_try[i] != -1; i++) { 177b21582eeSKirk McKusick if ((error = readsuper(devfd, &fs, sblock_try[i], 178b21582eeSKirk McKusick flags, readfunc)) == 0) { 179b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0) { 180b21582eeSKirk McKusick *fsp = fs; 181b21582eeSKirk McKusick return (0); 182b21582eeSKirk McKusick } 183dffce215SKirk McKusick break; 184b21582eeSKirk McKusick } 185efbf3964SKirk McKusick if (fs != NULL) { 186efbf3964SKirk McKusick UFS_FREE(fs, filltype); 187efbf3964SKirk McKusick fs = NULL; 188efbf3964SKirk McKusick } 1894cbd996aSKirk McKusick if (error == ENOENT) 190dffce215SKirk McKusick continue; 1914cbd996aSKirk McKusick return (error); 192dffce215SKirk McKusick } 193dffce215SKirk McKusick if (sblock_try[i] == -1) 194dffce215SKirk McKusick return (ENOENT); 195dffce215SKirk McKusick } 196dffce215SKirk McKusick /* 197dffce215SKirk McKusick * Read in the superblock summary information. 198dffce215SKirk McKusick */ 199dffce215SKirk McKusick size = fs->fs_cssize; 200dffce215SKirk McKusick blks = howmany(size, fs->fs_fsize); 201dffce215SKirk McKusick if (fs->fs_contigsumsize > 0) 202dffce215SKirk McKusick size += fs->fs_ncg * sizeof(int32_t); 203dffce215SKirk McKusick size += fs->fs_ncg * sizeof(u_int8_t); 204076002f2SKirk McKusick if ((fs_si = UFS_MALLOC(sizeof(*fs_si), filltype, M_NOWAIT)) == NULL) { 20534816cb9SKirk McKusick UFS_FREE(fs, filltype); 206076002f2SKirk McKusick return (ENOMEM); 20734816cb9SKirk McKusick } 20834816cb9SKirk McKusick bzero(fs_si, sizeof(*fs_si)); 20934816cb9SKirk McKusick fs->fs_si = fs_si; 210076002f2SKirk McKusick if ((space = UFS_MALLOC(size, filltype, M_NOWAIT)) == NULL) { 21134816cb9SKirk McKusick UFS_FREE(fs->fs_si, filltype); 212efbf3964SKirk McKusick UFS_FREE(fs, filltype); 213076002f2SKirk McKusick return (ENOMEM); 214efbf3964SKirk McKusick } 215dffce215SKirk McKusick fs->fs_csp = (struct csum *)space; 216dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) { 217dffce215SKirk McKusick size = fs->fs_bsize; 218dffce215SKirk McKusick if (i + fs->fs_frag > blks) 219dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize; 22016759360SMark Johnston buf = NULL; 2214cbd996aSKirk McKusick error = (*readfunc)(devfd, 222dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)), (void **)&buf, size); 2234cbd996aSKirk McKusick if (error) { 224efbf3964SKirk McKusick if (buf != NULL) 22516759360SMark Johnston UFS_FREE(buf, filltype); 226dffce215SKirk McKusick UFS_FREE(fs->fs_csp, filltype); 22734816cb9SKirk McKusick UFS_FREE(fs->fs_si, filltype); 228efbf3964SKirk McKusick UFS_FREE(fs, filltype); 2294cbd996aSKirk McKusick return (error); 230dffce215SKirk McKusick } 231dffce215SKirk McKusick memcpy(space, buf, size); 232dffce215SKirk McKusick UFS_FREE(buf, filltype); 233dffce215SKirk McKusick space += size; 234dffce215SKirk McKusick } 235dffce215SKirk McKusick if (fs->fs_contigsumsize > 0) { 236dffce215SKirk McKusick fs->fs_maxcluster = lp = (int32_t *)space; 237dffce215SKirk McKusick for (i = 0; i < fs->fs_ncg; i++) 238dffce215SKirk McKusick *lp++ = fs->fs_contigsumsize; 239dffce215SKirk McKusick space = (uint8_t *)lp; 240dffce215SKirk McKusick } 241dffce215SKirk McKusick size = fs->fs_ncg * sizeof(u_int8_t); 242dffce215SKirk McKusick fs->fs_contigdirs = (u_int8_t *)space; 243dffce215SKirk McKusick bzero(fs->fs_contigdirs, size); 244efbf3964SKirk McKusick *fsp = fs; 245dffce215SKirk McKusick return (0); 246dffce215SKirk McKusick } 247dffce215SKirk McKusick 248dffce215SKirk McKusick /* 249dffce215SKirk McKusick * Try to read a superblock from the location specified by sblockloc. 250dffce215SKirk McKusick * Return zero on success or an errno on failure. 251dffce215SKirk McKusick */ 252dffce215SKirk McKusick static int 253b21582eeSKirk McKusick readsuper(void *devfd, struct fs **fsp, off_t sblockloc, int flags, 254b21582eeSKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 255dffce215SKirk McKusick { 256dffce215SKirk McKusick struct fs *fs; 257ec888383SKirk McKusick int error, res; 258ec888383SKirk McKusick uint32_t ckhash; 259dffce215SKirk McKusick 260dffce215SKirk McKusick error = (*readfunc)(devfd, sblockloc, (void **)fsp, SBLOCKSIZE); 261dffce215SKirk McKusick if (error != 0) 262dffce215SKirk McKusick return (error); 263dffce215SKirk McKusick fs = *fsp; 264dffce215SKirk McKusick if (fs->fs_magic == FS_BAD_MAGIC) 265dffce215SKirk McKusick return (EINVAL); 26636e08b01SKirk McKusick /* 26736e08b01SKirk McKusick * For UFS1 with a 65536 block size, the first backup superblock 26836e08b01SKirk McKusick * is at the same location as the UFS2 superblock. Since SBLOCK_UFS2 26936e08b01SKirk McKusick * is the first location checked, the first backup is the superblock 27036e08b01SKirk McKusick * that will be accessed. Here we fail the lookup so that we can 27136e08b01SKirk McKusick * retry with the correct location for the UFS1 superblock. 27236e08b01SKirk McKusick */ 273b21582eeSKirk McKusick if (fs->fs_magic == FS_UFS1_MAGIC && (flags & UFS_ALTSBLK) == 0 && 27436e08b01SKirk McKusick fs->fs_bsize == SBLOCK_UFS2 && sblockloc == SBLOCK_UFS2) 27536e08b01SKirk McKusick return (ENOENT); 276b21582eeSKirk McKusick if ((error = validate_sblock(fs, flags)) > 0) 277076002f2SKirk McKusick return (error); 278a02bd3e3SKirk McKusick /* 279a02bd3e3SKirk McKusick * If the filesystem has been run on a kernel without 280a02bd3e3SKirk McKusick * metadata check hashes, disable them. 281a02bd3e3SKirk McKusick */ 282a02bd3e3SKirk McKusick if ((fs->fs_flags & FS_METACKHASH) == 0) 283a02bd3e3SKirk McKusick fs->fs_metackhash = 0; 284996d40f9SKirk McKusick /* 285996d40f9SKirk McKusick * Clear any check-hashes that are not maintained 286996d40f9SKirk McKusick * by this kernel. Also clear any unsupported flags. 287996d40f9SKirk McKusick */ 288996d40f9SKirk McKusick fs->fs_metackhash &= CK_SUPPORTED; 289996d40f9SKirk McKusick fs->fs_flags &= FS_SUPPORTED; 290ade67b50SKirk McKusick if (fs->fs_ckhash != (ckhash = ffs_calc_sbhash(fs))) { 291b21582eeSKirk McKusick if ((flags & (UFS_NOMSG | UFS_NOHASHFAIL)) == 292b21582eeSKirk McKusick (UFS_NOMSG | UFS_NOHASHFAIL)) 293f2b39152SKirk McKusick return (0); 294b21582eeSKirk McKusick if ((flags & UFS_NOMSG) != 0) 295b21582eeSKirk McKusick return (EINTEGRITY); 296ec888383SKirk McKusick #ifdef _KERNEL 297ec888383SKirk McKusick res = uprintf("Superblock check-hash failed: recorded " 298fb14e73cSKirk McKusick "check-hash 0x%x != computed check-hash 0x%x%s\n", 299fb14e73cSKirk McKusick fs->fs_ckhash, ckhash, 300b21582eeSKirk McKusick (flags & UFS_NOHASHFAIL) != 0 ? " (Ignored)" : ""); 301ec888383SKirk McKusick #else 302ec888383SKirk McKusick res = 0; 303ec888383SKirk McKusick #endif 304ec888383SKirk McKusick /* 305ec888383SKirk McKusick * Print check-hash failure if no controlling terminal 306ec888383SKirk McKusick * in kernel or always if in user-mode (libufs). 307ec888383SKirk McKusick */ 308ec888383SKirk McKusick if (res == 0) 309ec888383SKirk McKusick printf("Superblock check-hash failed: recorded " 310ec888383SKirk McKusick "check-hash 0x%x != computed check-hash " 311fb14e73cSKirk McKusick "0x%x%s\n", fs->fs_ckhash, ckhash, 312b21582eeSKirk McKusick (flags & UFS_NOHASHFAIL) ? " (Ignored)" : ""); 313b21582eeSKirk McKusick if ((flags & UFS_NOHASHFAIL) != 0) 314fb14e73cSKirk McKusick return (0); 315b21582eeSKirk McKusick return (EINTEGRITY); 316fb14e73cSKirk McKusick } 317dffce215SKirk McKusick /* Have to set for old filesystems that predate this field */ 318dffce215SKirk McKusick fs->fs_sblockactualloc = sblockloc; 319efbf3964SKirk McKusick /* Not yet any summary information */ 32034816cb9SKirk McKusick fs->fs_si = NULL; 321dffce215SKirk McKusick return (0); 322dffce215SKirk McKusick } 323dffce215SKirk McKusick 324dffce215SKirk McKusick /* 325076002f2SKirk McKusick * Verify the filesystem values. 326076002f2SKirk McKusick */ 327076002f2SKirk McKusick #define ILOG2(num) (fls(num) - 1) 32814821130SWarner Losh #ifdef STANDALONE_SMALL 32914821130SWarner Losh #define MPRINT(...) do { } while (0) 33014821130SWarner Losh #else 33114821130SWarner Losh #define MPRINT(...) if (prtmsg) printf(__VA_ARGS__) 33214821130SWarner Losh #endif 333d22531d5SKirk McKusick #define FCHK(lhs, op, rhs, fmt) \ 33450dc4c7dSKirk McKusick if (lhs op rhs) { \ 335b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 33650dc4c7dSKirk McKusick #fmt ")\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, \ 33750dc4c7dSKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs); \ 338f0be378aSKirk McKusick if (error < 0) \ 339f0be378aSKirk McKusick return (ENOENT); \ 340b21582eeSKirk McKusick if (error == 0) \ 341b21582eeSKirk McKusick error = ENOENT; \ 34250dc4c7dSKirk McKusick } 343d22531d5SKirk McKusick #define WCHK(lhs, op, rhs, fmt) \ 344d22531d5SKirk McKusick if (lhs op rhs) { \ 345d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 346d22531d5SKirk McKusick #fmt ")%s\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2,\ 347d22531d5SKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs, wmsg);\ 348d22531d5SKirk McKusick if (error == 0) \ 349d22531d5SKirk McKusick error = warnerr; \ 350d22531d5SKirk McKusick } 351d22531d5SKirk McKusick #define FCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \ 35250dc4c7dSKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \ 353b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 35450dc4c7dSKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")\n", \ 35550dc4c7dSKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \ 35650dc4c7dSKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \ 35750dc4c7dSKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2); \ 358f0be378aSKirk McKusick if (error < 0) \ 359f0be378aSKirk McKusick return (ENOENT); \ 360b21582eeSKirk McKusick if (error == 0) \ 361b21582eeSKirk McKusick error = ENOENT; \ 36250dc4c7dSKirk McKusick } 363d22531d5SKirk McKusick #define WCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \ 364d22531d5SKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \ 365d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \ 366d22531d5SKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")%s\n", \ 367d22531d5SKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \ 368d22531d5SKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \ 369d22531d5SKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2, wmsg); \ 370d22531d5SKirk McKusick if (error == 0) \ 371d22531d5SKirk McKusick error = warnerr; \ 372d22531d5SKirk McKusick } 373076002f2SKirk McKusick 374076002f2SKirk McKusick static int 375b21582eeSKirk McKusick validate_sblock(struct fs *fs, int flags) 376076002f2SKirk McKusick { 377548045bfSKirk McKusick u_long i, sectorsize; 378f3f5368dSKirk McKusick u_int64_t maxfilesize, sizepb; 379d22531d5SKirk McKusick int error, prtmsg, warnerr; 380d22531d5SKirk McKusick char *wmsg; 381076002f2SKirk McKusick 382b21582eeSKirk McKusick error = 0; 383076002f2SKirk McKusick sectorsize = dbtob(1); 384b21582eeSKirk McKusick prtmsg = ((flags & UFS_NOMSG) == 0); 385d22531d5SKirk McKusick warnerr = (flags & UFS_NOWARNFAIL) == UFS_NOWARNFAIL ? 0 : ENOENT; 386d22531d5SKirk McKusick wmsg = warnerr ? "" : " (Ignored)"; 387e6886616SKirk McKusick /* 388b13110e9SAlfredo Dal'Ava Junior * Check for endian mismatch between machine and filesystem. 389b13110e9SAlfredo Dal'Ava Junior */ 390b13110e9SAlfredo Dal'Ava Junior if (((fs->fs_magic != FS_UFS2_MAGIC) && 391b13110e9SAlfredo Dal'Ava Junior (bswap32(fs->fs_magic) == FS_UFS2_MAGIC)) || 392b13110e9SAlfredo Dal'Ava Junior ((fs->fs_magic != FS_UFS1_MAGIC) && 393b13110e9SAlfredo Dal'Ava Junior (bswap32(fs->fs_magic) == FS_UFS1_MAGIC))) { 394b13110e9SAlfredo Dal'Ava Junior MPRINT("UFS superblock failed due to endian mismatch " 395b13110e9SAlfredo Dal'Ava Junior "between machine and filesystem\n"); 396b13110e9SAlfredo Dal'Ava Junior return(EILSEQ); 397b13110e9SAlfredo Dal'Ava Junior } 398b13110e9SAlfredo Dal'Ava Junior /* 399e6886616SKirk McKusick * If just validating for recovery, then do just the minimal 400e6886616SKirk McKusick * checks needed for the superblock fields needed to find 401e6886616SKirk McKusick * alternate superblocks. 402e6886616SKirk McKusick */ 403e6886616SKirk McKusick if ((flags & UFS_FSRONLY) == UFS_FSRONLY && 404e6886616SKirk McKusick (fs->fs_magic == FS_UFS1_MAGIC || fs->fs_magic == FS_UFS2_MAGIC)) { 405f0be378aSKirk McKusick error = -1; /* fail on first error */ 406e6886616SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) { 407e6886616SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx); 408e6886616SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) { 409e6886616SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd); 410e6886616SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd); 411e6886616SKirk McKusick } 412e6886616SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd); 413e6886616SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd); 414e6886616SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd); 415e6886616SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd); 416e6886616SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), 417e6886616SKirk McKusick %jd); 418e6886616SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd); 419e6886616SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd); 420e6886616SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd); 42182ee4e1cSKirk McKusick FCHK(fs->fs_sbsize, >, SBLOCKSIZE, %jd); 42282ee4e1cSKirk McKusick FCHK(fs->fs_sbsize, <, (signed)sizeof(struct fs), %jd); 423e15d8f23SKirk McKusick FCHK(fs->fs_sbsize % sectorsize, !=, 0, %jd); 424e6886616SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd); 425e6886616SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd); 426e6886616SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd); 427e6886616SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd); 428e6886616SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd); 429e6886616SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, 430e6886616SKirk McKusick %jd); 431e6886616SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup( 432e6886616SKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize), 433e6886616SKirk McKusick fs->fs_frag), %jd); 434e6886616SKirk McKusick return (error); 435e6886616SKirk McKusick } 436076002f2SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) { 437184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0) 438d22531d5SKirk McKusick FCHK2(fs->fs_sblockactualloc, !=, SBLOCK_UFS2, 43950dc4c7dSKirk McKusick fs->fs_sblockactualloc, !=, 0, %jd); 440d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx); 441d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) * 44250dc4c7dSKirk McKusick sizeof(ufs2_daddr_t)), %jd); 443d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs2_daddr_t), 44450dc4c7dSKirk McKusick %jd); 445d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=, 446184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs2_dinode), %jd); 447076002f2SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) { 448184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0) 449d22531d5SKirk McKusick FCHK(fs->fs_sblockactualloc, >, SBLOCK_UFS1, %jd); 450d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd); 451d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd); 452d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs1_daddr_t), 45350dc4c7dSKirk McKusick %jd); 454d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=, 455184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs1_dinode), %jd); 456d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) * 45750dc4c7dSKirk McKusick sizeof(ufs1_daddr_t)), %jd); 458d22531d5SKirk McKusick WCHK(fs->fs_old_inodefmt, !=, FS_44INODEFMT, %jd); 459d22531d5SKirk McKusick WCHK(fs->fs_old_rotdelay, !=, 0, %jd); 460d22531d5SKirk McKusick WCHK(fs->fs_old_rps, !=, 60, %jd); 461d22531d5SKirk McKusick WCHK(fs->fs_old_nspf, !=, fs->fs_fsize / sectorsize, %jd); 462f0be378aSKirk McKusick FCHK(fs->fs_old_cpg, !=, 1, %jd); 463d22531d5SKirk McKusick WCHK(fs->fs_old_interleave, !=, 1, %jd); 464d22531d5SKirk McKusick WCHK(fs->fs_old_trackskew, !=, 0, %jd); 465d22531d5SKirk McKusick WCHK(fs->fs_old_cpc, !=, 0, %jd); 466d22531d5SKirk McKusick WCHK(fs->fs_old_postblformat, !=, 1, %jd); 467f0be378aSKirk McKusick FCHK(fs->fs_old_nrpos, !=, 1, %jd); 468d22531d5SKirk McKusick WCHK(fs->fs_old_spc, !=, fs->fs_fpg * fs->fs_old_nspf, %jd); 469d22531d5SKirk McKusick WCHK(fs->fs_old_nsect, !=, fs->fs_old_spc, %jd); 470d22531d5SKirk McKusick WCHK(fs->fs_old_npsect, !=, fs->fs_old_spc, %jd); 471d22531d5SKirk McKusick FCHK(fs->fs_old_ncyl, !=, fs->fs_ncg, %jd); 472076002f2SKirk McKusick } else { 47350dc4c7dSKirk McKusick /* Bad magic number, so assume not a superblock */ 474076002f2SKirk McKusick return (ENOENT); 475076002f2SKirk McKusick } 476d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd); 477d22531d5SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd); 478d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), %jd); 479d22531d5SKirk McKusick FCHK(powerof2(fs->fs_bsize), ==, 0, %jd); 480d22531d5SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd); 481d22531d5SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd); 482d22531d5SKirk McKusick FCHK(fs->fs_frag, !=, numfrags(fs, fs->fs_bsize), %jd); 483d22531d5SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd); 484d22531d5SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd); 485d22531d5SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd); 486d22531d5SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd); 487d22531d5SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd); 488f0be378aSKirk McKusick FCHK(fs->fs_ipg, <, fs->fs_inopb, %jd); 4898435a9b2SKirk McKusick FCHK((u_int64_t)fs->fs_ipg * fs->fs_ncg, >, 4908435a9b2SKirk McKusick (((int64_t)(1)) << 32) - INOPB(fs), %jd); 491f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, <, 0, %jd); 4928435a9b2SKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, >, (u_int64_t)fs->fs_ipg * fs->fs_ncg, 4938435a9b2SKirk McKusick %jd); 494f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, <, 0, %jd); 495f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, >, 4968435a9b2SKirk McKusick ((u_int64_t)fs->fs_ipg * fs->fs_ncg) - fs->fs_cstotal.cs_nifree, 4978435a9b2SKirk McKusick %jd); 498d22531d5SKirk McKusick FCHK(fs->fs_sbsize, >, SBLOCKSIZE, %jd); 499f0be378aSKirk McKusick FCHK(fs->fs_sbsize, <, (signed)sizeof(struct fs), %jd); 500d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, <, fs->fs_bsize, %jd); 501d22531d5SKirk McKusick FCHK(powerof2(fs->fs_maxbsize), ==, 0, %jd); 502d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, >, FS_MAXCONTIG * fs->fs_bsize, %jd); 503d22531d5SKirk McKusick FCHK(fs->fs_bmask, !=, ~(fs->fs_bsize - 1), %#jx); 504d22531d5SKirk McKusick FCHK(fs->fs_fmask, !=, ~(fs->fs_fsize - 1), %#jx); 505d22531d5SKirk McKusick FCHK(fs->fs_qbmask, !=, ~fs->fs_bmask, %#jx); 506d22531d5SKirk McKusick FCHK(fs->fs_qfmask, !=, ~fs->fs_fmask, %#jx); 507d22531d5SKirk McKusick FCHK(fs->fs_bshift, !=, ILOG2(fs->fs_bsize), %jd); 508d22531d5SKirk McKusick FCHK(fs->fs_fshift, !=, ILOG2(fs->fs_fsize), %jd); 509d22531d5SKirk McKusick FCHK(fs->fs_fragshift, !=, ILOG2(fs->fs_frag), %jd); 510d22531d5SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd); 511d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd); 512d22531d5SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd); 513d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, %jd); 514f0be378aSKirk McKusick /* 515f0be378aSKirk McKusick * If anything has failed up to this point, it is usafe to proceed 516f0be378aSKirk McKusick * as checks below may divide by zero or make other fatal calculations. 517f0be378aSKirk McKusick * So if we have any errors at this point, give up. 518f0be378aSKirk McKusick */ 519f0be378aSKirk McKusick if (error) 520f0be378aSKirk McKusick return (error); 521e15d8f23SKirk McKusick FCHK(fs->fs_sbsize % sectorsize, !=, 0, %jd); 5229dee5da7SKirk McKusick FCHK(fs->fs_ipg % fs->fs_inopb, !=, 0, %jd); 523d22531d5SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup( 52450dc4c7dSKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize), 52550dc4c7dSKirk McKusick fs->fs_frag), %jd); 526d22531d5SKirk McKusick FCHK(fs->fs_cblkno, !=, fs->fs_sblkno + 52750dc4c7dSKirk McKusick roundup(howmany(SBLOCKSIZE, fs->fs_fsize), fs->fs_frag), %jd); 528d22531d5SKirk McKusick FCHK(fs->fs_iblkno, !=, fs->fs_cblkno + fs->fs_frag, %jd); 529d22531d5SKirk McKusick FCHK(fs->fs_dblkno, !=, fs->fs_iblkno + fs->fs_ipg / INOPF(fs), %jd); 530d22531d5SKirk McKusick FCHK(fs->fs_cgsize, >, fs->fs_bsize, %jd); 531f0be378aSKirk McKusick FCHK(fs->fs_cgsize, <, fs->fs_fsize, %jd); 532f0be378aSKirk McKusick FCHK(fs->fs_cgsize % fs->fs_fsize, !=, 0, %jd); 5335bc926afSKirk McKusick /* 5345bc926afSKirk McKusick * This test is valid, however older versions of growfs failed 5355bc926afSKirk McKusick * to correctly update fs_dsize so will fail this test. Thus we 5365bc926afSKirk McKusick * exclude it from the requirements. 5375bc926afSKirk McKusick */ 5385bc926afSKirk McKusick #ifdef notdef 539d22531d5SKirk McKusick WCHK(fs->fs_dsize, !=, fs->fs_size - fs->fs_sblkno - 540076002f2SKirk McKusick fs->fs_ncg * (fs->fs_dblkno - fs->fs_sblkno) - 54150dc4c7dSKirk McKusick howmany(fs->fs_cssize, fs->fs_fsize), %jd); 5425bc926afSKirk McKusick #endif 543d22531d5SKirk McKusick WCHK(fs->fs_metaspace, <, 0, %jd); 544d22531d5SKirk McKusick WCHK(fs->fs_metaspace, >, fs->fs_fpg / 2, %jd); 545d22531d5SKirk McKusick WCHK(fs->fs_minfree, >, 99, %jd%%); 546076002f2SKirk McKusick maxfilesize = fs->fs_bsize * UFS_NDADDR - 1; 547076002f2SKirk McKusick for (sizepb = fs->fs_bsize, i = 0; i < UFS_NIADDR; i++) { 548076002f2SKirk McKusick sizepb *= NINDIR(fs); 549076002f2SKirk McKusick maxfilesize += sizepb; 550076002f2SKirk McKusick } 551d22531d5SKirk McKusick WCHK(fs->fs_maxfilesize, !=, maxfilesize, %jd); 552076002f2SKirk McKusick /* 553076002f2SKirk McKusick * These values have a tight interaction with each other that 554076002f2SKirk McKusick * makes it hard to tightly bound them. So we can only check 555076002f2SKirk McKusick * that they are within a broader possible range. 556076002f2SKirk McKusick * 557f3f5368dSKirk McKusick * The size cannot always be accurately determined, but ensure 558f3f5368dSKirk McKusick * that it is consistent with the number of cylinder groups (fs_ncg) 559f3f5368dSKirk McKusick * and the number of fragments per cylinder group (fs_fpg). Ensure 560f3f5368dSKirk McKusick * that the summary information size is correct and that it starts 561f3f5368dSKirk McKusick * and ends in the data area of the same cylinder group. 562076002f2SKirk McKusick */ 563d22531d5SKirk McKusick FCHK(fs->fs_size, <, 8 * fs->fs_frag, %jd); 564017367c1SKonstantin Belousov FCHK(fs->fs_size, <=, ((int64_t)fs->fs_ncg - 1) * fs->fs_fpg, %jd); 565017367c1SKonstantin Belousov FCHK(fs->fs_size, >, (int64_t)fs->fs_ncg * fs->fs_fpg, %jd); 566b21582eeSKirk McKusick /* 567b21582eeSKirk McKusick * If we are not requested to read in the csum data stop here 568b21582eeSKirk McKusick * as the correctness of the remaining values is only important 569b21582eeSKirk McKusick * to bound the space needed to be allocated to hold the csum data. 570b21582eeSKirk McKusick */ 571b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0) 572b21582eeSKirk McKusick return (error); 573d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, 0, %jd); 574d22531d5SKirk McKusick FCHK(fs->fs_cssize, !=, 575f3f5368dSKirk McKusick fragroundup(fs, fs->fs_ncg * sizeof(struct csum)), %jd); 576d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr), >, fs->fs_ncg, %jd); 577d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, cgdmin(fs, dtog(fs, fs->fs_csaddr)), %jd); 578d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr + howmany(fs->fs_cssize, fs->fs_fsize)), >, 579548045bfSKirk McKusick dtog(fs, fs->fs_csaddr), %jd); 580076002f2SKirk McKusick /* 581bc218d89SKirk McKusick * With file system clustering it is possible to allocate 582bc218d89SKirk McKusick * many contiguous blocks. The kernel variable maxphys defines 583bc218d89SKirk McKusick * the maximum transfer size permitted by the controller and/or 584bc218d89SKirk McKusick * buffering. The fs_maxcontig parameter controls the maximum 585bc218d89SKirk McKusick * number of blocks that the filesystem will read or write 586bc218d89SKirk McKusick * in a single transfer. It is calculated when the filesystem 587bc218d89SKirk McKusick * is created as maxphys / fs_bsize. The loader uses a maxphys 588bc218d89SKirk McKusick * of 128K even when running on a system that supports larger 589bc218d89SKirk McKusick * values. If the filesystem was built on a system that supports 590bc218d89SKirk McKusick * a larger maxphys (1M is typical) it will have configured 591bc218d89SKirk McKusick * fs_maxcontig for that larger system. So we bound the upper 592bc218d89SKirk McKusick * allowable limit for fs_maxconfig to be able to at least 593bc218d89SKirk McKusick * work with a 1M maxphys on the smallest block size filesystem: 594bc218d89SKirk McKusick * 1M / 4096 == 256. There is no harm in allowing the mounting of 595bc218d89SKirk McKusick * filesystems that make larger than maxphys I/O requests because 596bc218d89SKirk McKusick * those (mostly 32-bit machines) can (very slowly) handle I/O 597bc218d89SKirk McKusick * requests that exceed maxphys. 598076002f2SKirk McKusick */ 599d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, <, 0, %jd); 600d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, >, MAX(256, maxphys / fs->fs_bsize), %jd); 601f0be378aSKirk McKusick FCHK2(fs->fs_maxcontig, ==, 0, fs->fs_contigsumsize, !=, 0, %jd); 602f0be378aSKirk McKusick FCHK2(fs->fs_maxcontig, >, 1, fs->fs_contigsumsize, !=, 60350dc4c7dSKirk McKusick MIN(fs->fs_maxcontig, FS_MAXCONTIG), %jd); 604b21582eeSKirk McKusick return (error); 605076002f2SKirk McKusick } 606076002f2SKirk McKusick 607076002f2SKirk McKusick /* 608e6886616SKirk McKusick * Make an extensive search to find a superblock. If the superblock 609e6886616SKirk McKusick * in the standard place cannot be used, try looking for one of the 610e6886616SKirk McKusick * backup superblocks. 611e6886616SKirk McKusick * 612e6886616SKirk McKusick * Flags are made up of the following or'ed together options: 613e6886616SKirk McKusick * 614e6886616SKirk McKusick * UFS_NOMSG indicates that superblock inconsistency error messages 615e6886616SKirk McKusick * should not be printed. 616e6886616SKirk McKusick * 617e6886616SKirk McKusick * UFS_NOCSUM causes only the superblock itself to be returned, but does 618e6886616SKirk McKusick * not read in any auxillary data structures like the cylinder group 619e6886616SKirk McKusick * summary information. 620e6886616SKirk McKusick */ 621e6886616SKirk McKusick int 622e6886616SKirk McKusick ffs_sbsearch(void *devfd, struct fs **fsp, int reqflags, 623e6886616SKirk McKusick struct malloc_type *filltype, 624e6886616SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size)) 625e6886616SKirk McKusick { 626e6886616SKirk McKusick struct fsrecovery *fsr; 627e6886616SKirk McKusick struct fs *protofs; 628e6886616SKirk McKusick void *fsrbuf; 629e6886616SKirk McKusick char *cp; 630e6886616SKirk McKusick long nocsum, flags, msg, cg; 631e6886616SKirk McKusick off_t sblk, secsize; 632e6886616SKirk McKusick int error; 633e6886616SKirk McKusick 634e6886616SKirk McKusick msg = (reqflags & UFS_NOMSG) == 0; 635e6886616SKirk McKusick nocsum = reqflags & UFS_NOCSUM; 636e6886616SKirk McKusick /* 637e6886616SKirk McKusick * Try normal superblock read and return it if it works. 638e6886616SKirk McKusick * 639e6886616SKirk McKusick * Suppress messages if it fails until we find out if 640e6886616SKirk McKusick * failure can be avoided. 641e6886616SKirk McKusick */ 642e6886616SKirk McKusick flags = UFS_NOMSG | nocsum; 643b13110e9SAlfredo Dal'Ava Junior error = ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc); 644b13110e9SAlfredo Dal'Ava Junior /* 645b13110e9SAlfredo Dal'Ava Junior * If successful or endian error, no need to try further. 646b13110e9SAlfredo Dal'Ava Junior */ 647b13110e9SAlfredo Dal'Ava Junior if (error == 0 || error == EILSEQ) { 648b13110e9SAlfredo Dal'Ava Junior if (msg && error == EILSEQ) 649b13110e9SAlfredo Dal'Ava Junior printf("UFS superblock failed due to endian mismatch " 650b13110e9SAlfredo Dal'Ava Junior "between machine and filesystem\n"); 651b13110e9SAlfredo Dal'Ava Junior return (error); 652b13110e9SAlfredo Dal'Ava Junior } 653e6886616SKirk McKusick /* 654e6886616SKirk McKusick * First try: ignoring hash failures. 655e6886616SKirk McKusick */ 656e6886616SKirk McKusick flags |= UFS_NOHASHFAIL; 657e6886616SKirk McKusick if (msg) 658e6886616SKirk McKusick flags &= ~UFS_NOMSG; 659e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) == 0) 660e6886616SKirk McKusick return (0); 661e6886616SKirk McKusick /* 662e6886616SKirk McKusick * Next up is to check if fields of the superblock that are 663e6886616SKirk McKusick * needed to find backup superblocks are usable. 664e6886616SKirk McKusick */ 665e6886616SKirk McKusick if (msg) 666e6886616SKirk McKusick printf("Attempted recovery for standard superblock: failed\n"); 667e6886616SKirk McKusick flags = UFS_FSRONLY | UFS_NOHASHFAIL | UFS_NOMSG; 668e6886616SKirk McKusick if (ffs_sbget(devfd, &protofs, UFS_STDSB, flags, filltype, 669e6886616SKirk McKusick readfunc) == 0) { 670e6886616SKirk McKusick if (msg) 671f0be378aSKirk McKusick printf("Attempt extraction of recovery data from " 672f0be378aSKirk McKusick "standard superblock.\n"); 673e6886616SKirk McKusick } else { 674e6886616SKirk McKusick /* 675e6886616SKirk McKusick * Final desperation is to see if alternate superblock 676e6886616SKirk McKusick * parameters have been saved in the boot area. 677e6886616SKirk McKusick */ 678e6886616SKirk McKusick if (msg) 679e6886616SKirk McKusick printf("Attempted extraction of recovery data from " 680e6886616SKirk McKusick "standard superblock: failed\nAttempt to find " 681f0be378aSKirk McKusick "boot zone recovery data.\n"); 682e6886616SKirk McKusick /* 683e6886616SKirk McKusick * Look to see if recovery information has been saved. 684e6886616SKirk McKusick * If so we can generate a prototype superblock based 685e6886616SKirk McKusick * on that information. 686e6886616SKirk McKusick * 687e6886616SKirk McKusick * We need fragments-per-group, number of cylinder groups, 688e6886616SKirk McKusick * location of the superblock within the cylinder group, and 689e6886616SKirk McKusick * the conversion from filesystem fragments to disk blocks. 690e6886616SKirk McKusick * 691e6886616SKirk McKusick * When building a UFS2 filesystem, newfs(8) stores these 692e6886616SKirk McKusick * details at the end of the boot block area at the start 693e6886616SKirk McKusick * of the filesystem partition. If they have been overwritten 694e6886616SKirk McKusick * by a boot block, we fail. But usually they are there 695e6886616SKirk McKusick * and we can use them. 696e6886616SKirk McKusick * 697e6886616SKirk McKusick * We could ask the underlying device for its sector size, 698e6886616SKirk McKusick * but some devices lie. So we just try a plausible range. 699e6886616SKirk McKusick */ 700e6886616SKirk McKusick error = ENOENT; 701b13110e9SAlfredo Dal'Ava Junior fsrbuf = NULL; 702e6886616SKirk McKusick for (secsize = dbtob(1); secsize <= SBLOCKSIZE; secsize *= 2) 703e6886616SKirk McKusick if ((error = (*readfunc)(devfd, (SBLOCK_UFS2 - secsize), 704e6886616SKirk McKusick &fsrbuf, secsize)) == 0) 705e6886616SKirk McKusick break; 706e6886616SKirk McKusick if (error != 0) 707e6886616SKirk McKusick goto trynowarn; 708e6886616SKirk McKusick cp = fsrbuf; /* type change to keep compiler happy */ 709e6886616SKirk McKusick fsr = (struct fsrecovery *)&cp[secsize - sizeof *fsr]; 710e6886616SKirk McKusick if (fsr->fsr_magic != FS_UFS2_MAGIC || 711e6886616SKirk McKusick (protofs = UFS_MALLOC(SBLOCKSIZE, filltype, M_NOWAIT)) 712e6886616SKirk McKusick == NULL) { 713e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype); 714e6886616SKirk McKusick goto trynowarn; 715e6886616SKirk McKusick } 716e6886616SKirk McKusick memset(protofs, 0, sizeof(struct fs)); 717e6886616SKirk McKusick protofs->fs_fpg = fsr->fsr_fpg; 718e6886616SKirk McKusick protofs->fs_fsbtodb = fsr->fsr_fsbtodb; 719e6886616SKirk McKusick protofs->fs_sblkno = fsr->fsr_sblkno; 720e6886616SKirk McKusick protofs->fs_magic = fsr->fsr_magic; 721e6886616SKirk McKusick protofs->fs_ncg = fsr->fsr_ncg; 722e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype); 723e6886616SKirk McKusick } 724e6886616SKirk McKusick /* 725e6886616SKirk McKusick * Scan looking for alternative superblocks. 726e6886616SKirk McKusick */ 727f0be378aSKirk McKusick flags = nocsum; 728f0be378aSKirk McKusick if (!msg) 729f0be378aSKirk McKusick flags |= UFS_NOMSG; 730e6886616SKirk McKusick for (cg = 0; cg < protofs->fs_ncg; cg++) { 731f0be378aSKirk McKusick sblk = fsbtodb(protofs, cgsblock(protofs, cg)); 732f0be378aSKirk McKusick if (msg) 733f0be378aSKirk McKusick printf("Try cg %ld at sblock loc %jd\n", cg, 734f0be378aSKirk McKusick (intmax_t)sblk); 735f0be378aSKirk McKusick if (ffs_sbget(devfd, fsp, dbtob(sblk), flags, filltype, 736e6886616SKirk McKusick readfunc) == 0) { 737e6886616SKirk McKusick if (msg) 738f0be378aSKirk McKusick printf("Succeeded with alternate superblock " 739f0be378aSKirk McKusick "at %jd\n", (intmax_t)sblk); 740e6886616SKirk McKusick UFS_FREE(protofs, filltype); 741e6886616SKirk McKusick return (0); 742e6886616SKirk McKusick } 743e6886616SKirk McKusick } 744e6886616SKirk McKusick UFS_FREE(protofs, filltype); 745e6886616SKirk McKusick /* 746e6886616SKirk McKusick * Our alternate superblock strategies failed. Our last ditch effort 747e6886616SKirk McKusick * is to see if the standard superblock has only non-critical errors. 748e6886616SKirk McKusick */ 749e6886616SKirk McKusick trynowarn: 750e6886616SKirk McKusick flags = UFS_NOWARNFAIL | UFS_NOMSG | nocsum; 751e6886616SKirk McKusick if (msg) { 752f0be378aSKirk McKusick printf("Finding an alternate superblock failed.\nCheck for " 753f0be378aSKirk McKusick "only non-critical errors in standard superblock\n"); 754e6886616SKirk McKusick flags &= ~UFS_NOMSG; 755e6886616SKirk McKusick } 756f0be378aSKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) != 0) { 757e6886616SKirk McKusick if (msg) 758f0be378aSKirk McKusick printf("Failed, superblock has critical errors\n"); 759f0be378aSKirk McKusick return (ENOENT); 760f0be378aSKirk McKusick } 761f0be378aSKirk McKusick if (msg) 762f0be378aSKirk McKusick printf("Success, using standard superblock with " 763f0be378aSKirk McKusick "non-critical errors.\n"); 764e6886616SKirk McKusick return (0); 765e6886616SKirk McKusick } 766e6886616SKirk McKusick 767e6886616SKirk McKusick /* 768dffce215SKirk McKusick * Write a superblock to the devfd device from the memory pointed to by fs. 769dffce215SKirk McKusick * Write out the superblock summary information if it is present. 770dffce215SKirk McKusick * 771dffce215SKirk McKusick * If the write is successful, zero is returned. Otherwise one of the 772dffce215SKirk McKusick * following error values is returned: 773dffce215SKirk McKusick * EIO: failed to write superblock. 774dffce215SKirk McKusick * EIO: failed to write superblock summary information. 775dffce215SKirk McKusick */ 776dffce215SKirk McKusick int 777dffce215SKirk McKusick ffs_sbput(void *devfd, struct fs *fs, off_t loc, 778dffce215SKirk McKusick int (*writefunc)(void *devfd, off_t loc, void *buf, int size)) 779dffce215SKirk McKusick { 780dffce215SKirk McKusick int i, error, blks, size; 781dffce215SKirk McKusick uint8_t *space; 782dffce215SKirk McKusick 783dffce215SKirk McKusick /* 784dffce215SKirk McKusick * If there is summary information, write it first, so if there 785dffce215SKirk McKusick * is an error, the superblock will not be marked as clean. 786dffce215SKirk McKusick */ 78734816cb9SKirk McKusick if (fs->fs_si != NULL && fs->fs_csp != NULL) { 788dffce215SKirk McKusick blks = howmany(fs->fs_cssize, fs->fs_fsize); 789dffce215SKirk McKusick space = (uint8_t *)fs->fs_csp; 790dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) { 791dffce215SKirk McKusick size = fs->fs_bsize; 792dffce215SKirk McKusick if (i + fs->fs_frag > blks) 793dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize; 794dffce215SKirk McKusick if ((error = (*writefunc)(devfd, 795dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)), 796dffce215SKirk McKusick space, size)) != 0) 797dffce215SKirk McKusick return (error); 798dffce215SKirk McKusick space += size; 799dffce215SKirk McKusick } 800dffce215SKirk McKusick } 801dffce215SKirk McKusick fs->fs_fmod = 0; 80293440bbeSKirk McKusick #ifndef _KERNEL 80393440bbeSKirk McKusick { 80493440bbeSKirk McKusick struct fs_summary_info *fs_si; 80593440bbeSKirk McKusick 80693440bbeSKirk McKusick fs->fs_time = time(NULL); 80793440bbeSKirk McKusick /* Clear the pointers for the duration of writing. */ 80893440bbeSKirk McKusick fs_si = fs->fs_si; 80993440bbeSKirk McKusick fs->fs_si = NULL; 810ade67b50SKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs); 81193440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); 81293440bbeSKirk McKusick fs->fs_si = fs_si; 81393440bbeSKirk McKusick } 81493440bbeSKirk McKusick #else /* _KERNEL */ 81593440bbeSKirk McKusick fs->fs_time = time_second; 81693440bbeSKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs); 81793440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize); 81893440bbeSKirk McKusick #endif /* _KERNEL */ 819dffce215SKirk McKusick return (error); 820dffce215SKirk McKusick } 821dffce215SKirk McKusick 822dffce215SKirk McKusick /* 823ec888383SKirk McKusick * Calculate the check-hash for a superblock. 824ec888383SKirk McKusick */ 825ade67b50SKirk McKusick uint32_t 826ade67b50SKirk McKusick ffs_calc_sbhash(struct fs *fs) 827ec888383SKirk McKusick { 828ec888383SKirk McKusick uint32_t ckhash, save_ckhash; 829ec888383SKirk McKusick 830ec888383SKirk McKusick /* 831ec888383SKirk McKusick * A filesystem that was using a superblock ckhash may be moved 832ec888383SKirk McKusick * to an older kernel that does not support ckhashes. The 833ec888383SKirk McKusick * older kernel will clear the FS_METACKHASH flag indicating 834ec888383SKirk McKusick * that it does not update hashes. When the disk is moved back 835ec888383SKirk McKusick * to a kernel capable of ckhashes it disables them on mount: 836ec888383SKirk McKusick * 837ec888383SKirk McKusick * if ((fs->fs_flags & FS_METACKHASH) == 0) 838ec888383SKirk McKusick * fs->fs_metackhash = 0; 839ec888383SKirk McKusick * 840ec888383SKirk McKusick * This leaves (fs->fs_metackhash & CK_SUPERBLOCK) == 0) with an 841ec888383SKirk McKusick * old stale value in the fs->fs_ckhash field. Thus the need to 842ec888383SKirk McKusick * just accept what is there. 843ec888383SKirk McKusick */ 844ec888383SKirk McKusick if ((fs->fs_metackhash & CK_SUPERBLOCK) == 0) 845ec888383SKirk McKusick return (fs->fs_ckhash); 846ec888383SKirk McKusick 847ec888383SKirk McKusick save_ckhash = fs->fs_ckhash; 848ec888383SKirk McKusick fs->fs_ckhash = 0; 849ec888383SKirk McKusick /* 850ec888383SKirk McKusick * If newly read from disk, the caller is responsible for 851ec888383SKirk McKusick * verifying that fs->fs_sbsize <= SBLOCKSIZE. 852ec888383SKirk McKusick */ 853ec888383SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)fs, fs->fs_sbsize); 854ec888383SKirk McKusick fs->fs_ckhash = save_ckhash; 855ec888383SKirk McKusick return (ckhash); 856ec888383SKirk McKusick } 857ec888383SKirk McKusick 858ec888383SKirk McKusick /* 859df8bae1dSRodney W. Grimes * Update the frsum fields to reflect addition or deletion 860df8bae1dSRodney W. Grimes * of some frags. 861df8bae1dSRodney W. Grimes */ 862df8bae1dSRodney W. Grimes void 86315c377c3SEd Maste ffs_fragacct(struct fs *fs, int fragmap, int32_t fraglist[], int cnt) 864df8bae1dSRodney W. Grimes { 865df8bae1dSRodney W. Grimes int inblk; 86605f4ff5dSPoul-Henning Kamp int field, subfield; 86705f4ff5dSPoul-Henning Kamp int siz, pos; 868df8bae1dSRodney W. Grimes 869df8bae1dSRodney W. Grimes inblk = (int)(fragtbl[fs->fs_frag][fragmap]) << 1; 870df8bae1dSRodney W. Grimes fragmap <<= 1; 871df8bae1dSRodney W. Grimes for (siz = 1; siz < fs->fs_frag; siz++) { 872df8bae1dSRodney W. Grimes if ((inblk & (1 << (siz + (fs->fs_frag % NBBY)))) == 0) 873df8bae1dSRodney W. Grimes continue; 874df8bae1dSRodney W. Grimes field = around[siz]; 875df8bae1dSRodney W. Grimes subfield = inside[siz]; 876df8bae1dSRodney W. Grimes for (pos = siz; pos <= fs->fs_frag; pos++) { 877df8bae1dSRodney W. Grimes if ((fragmap & field) == subfield) { 878df8bae1dSRodney W. Grimes fraglist[siz] += cnt; 879df8bae1dSRodney W. Grimes pos += siz; 880df8bae1dSRodney W. Grimes field <<= siz; 881df8bae1dSRodney W. Grimes subfield <<= siz; 882df8bae1dSRodney W. Grimes } 883df8bae1dSRodney W. Grimes field <<= 1; 884df8bae1dSRodney W. Grimes subfield <<= 1; 885df8bae1dSRodney W. Grimes } 886df8bae1dSRodney W. Grimes } 887df8bae1dSRodney W. Grimes } 888df8bae1dSRodney W. Grimes 889df8bae1dSRodney W. Grimes /* 890df8bae1dSRodney W. Grimes * block operations 891df8bae1dSRodney W. Grimes * 892df8bae1dSRodney W. Grimes * check if a block is available 893df8bae1dSRodney W. Grimes */ 894df8bae1dSRodney W. Grimes int 89515c377c3SEd Maste ffs_isblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) 896df8bae1dSRodney W. Grimes { 897df8bae1dSRodney W. Grimes unsigned char mask; 898df8bae1dSRodney W. Grimes 899df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 900df8bae1dSRodney W. Grimes case 8: 901df8bae1dSRodney W. Grimes return (cp[h] == 0xff); 902df8bae1dSRodney W. Grimes case 4: 903df8bae1dSRodney W. Grimes mask = 0x0f << ((h & 0x1) << 2); 904df8bae1dSRodney W. Grimes return ((cp[h >> 1] & mask) == mask); 905df8bae1dSRodney W. Grimes case 2: 906df8bae1dSRodney W. Grimes mask = 0x03 << ((h & 0x3) << 1); 907df8bae1dSRodney W. Grimes return ((cp[h >> 2] & mask) == mask); 908df8bae1dSRodney W. Grimes case 1: 909df8bae1dSRodney W. Grimes mask = 0x01 << (h & 0x7); 910df8bae1dSRodney W. Grimes return ((cp[h >> 3] & mask) == mask); 911df8bae1dSRodney W. Grimes default: 912113db2ddSJeff Roberson #ifdef _KERNEL 913df8bae1dSRodney W. Grimes panic("ffs_isblock"); 914113db2ddSJeff Roberson #endif 915113db2ddSJeff Roberson break; 916113db2ddSJeff Roberson } 917113db2ddSJeff Roberson return (0); 918113db2ddSJeff Roberson } 919113db2ddSJeff Roberson 920113db2ddSJeff Roberson /* 921113db2ddSJeff Roberson * check if a block is free 922113db2ddSJeff Roberson */ 923113db2ddSJeff Roberson int 92415c377c3SEd Maste ffs_isfreeblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) 925113db2ddSJeff Roberson { 926113db2ddSJeff Roberson 927113db2ddSJeff Roberson switch ((int)fs->fs_frag) { 928113db2ddSJeff Roberson case 8: 929113db2ddSJeff Roberson return (cp[h] == 0); 930113db2ddSJeff Roberson case 4: 931113db2ddSJeff Roberson return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0); 932113db2ddSJeff Roberson case 2: 933113db2ddSJeff Roberson return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0); 934113db2ddSJeff Roberson case 1: 935113db2ddSJeff Roberson return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0); 936113db2ddSJeff Roberson default: 937113db2ddSJeff Roberson #ifdef _KERNEL 938113db2ddSJeff Roberson panic("ffs_isfreeblock"); 939113db2ddSJeff Roberson #endif 940113db2ddSJeff Roberson break; 941df8bae1dSRodney W. Grimes } 942589c7af9SKirk McKusick return (0); 943df8bae1dSRodney W. Grimes } 944df8bae1dSRodney W. Grimes 945df8bae1dSRodney W. Grimes /* 946df8bae1dSRodney W. Grimes * take a block out of the map 947df8bae1dSRodney W. Grimes */ 948df8bae1dSRodney W. Grimes void 94915c377c3SEd Maste ffs_clrblock(struct fs *fs, u_char *cp, ufs1_daddr_t h) 950df8bae1dSRodney W. Grimes { 951df8bae1dSRodney W. Grimes 952df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 953df8bae1dSRodney W. Grimes case 8: 954df8bae1dSRodney W. Grimes cp[h] = 0; 955df8bae1dSRodney W. Grimes return; 956df8bae1dSRodney W. Grimes case 4: 957df8bae1dSRodney W. Grimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2)); 958df8bae1dSRodney W. Grimes return; 959df8bae1dSRodney W. Grimes case 2: 960df8bae1dSRodney W. Grimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1)); 961df8bae1dSRodney W. Grimes return; 962df8bae1dSRodney W. Grimes case 1: 963df8bae1dSRodney W. Grimes cp[h >> 3] &= ~(0x01 << (h & 0x7)); 964df8bae1dSRodney W. Grimes return; 965df8bae1dSRodney W. Grimes default: 966113db2ddSJeff Roberson #ifdef _KERNEL 967df8bae1dSRodney W. Grimes panic("ffs_clrblock"); 968113db2ddSJeff Roberson #endif 969113db2ddSJeff Roberson break; 970df8bae1dSRodney W. Grimes } 971df8bae1dSRodney W. Grimes } 972df8bae1dSRodney W. Grimes 973df8bae1dSRodney W. Grimes /* 974df8bae1dSRodney W. Grimes * put a block into the map 975df8bae1dSRodney W. Grimes */ 976df8bae1dSRodney W. Grimes void 97715c377c3SEd Maste ffs_setblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h) 978df8bae1dSRodney W. Grimes { 979df8bae1dSRodney W. Grimes 980df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) { 981df8bae1dSRodney W. Grimes case 8: 982df8bae1dSRodney W. Grimes cp[h] = 0xff; 983df8bae1dSRodney W. Grimes return; 984df8bae1dSRodney W. Grimes case 4: 985df8bae1dSRodney W. Grimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2)); 986df8bae1dSRodney W. Grimes return; 987df8bae1dSRodney W. Grimes case 2: 988df8bae1dSRodney W. Grimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1)); 989df8bae1dSRodney W. Grimes return; 990df8bae1dSRodney W. Grimes case 1: 991df8bae1dSRodney W. Grimes cp[h >> 3] |= (0x01 << (h & 0x7)); 992df8bae1dSRodney W. Grimes return; 993df8bae1dSRodney W. Grimes default: 994113db2ddSJeff Roberson #ifdef _KERNEL 995df8bae1dSRodney W. Grimes panic("ffs_setblock"); 996113db2ddSJeff Roberson #endif 997113db2ddSJeff Roberson break; 998df8bae1dSRodney W. Grimes } 999df8bae1dSRodney W. Grimes } 1000113db2ddSJeff Roberson 1001113db2ddSJeff Roberson /* 1002113db2ddSJeff Roberson * Update the cluster map because of an allocation or free. 1003113db2ddSJeff Roberson * 1004113db2ddSJeff Roberson * Cnt == 1 means free; cnt == -1 means allocating. 1005113db2ddSJeff Roberson */ 1006113db2ddSJeff Roberson void 100715c377c3SEd Maste ffs_clusteracct(struct fs *fs, struct cg *cgp, ufs1_daddr_t blkno, int cnt) 1008113db2ddSJeff Roberson { 1009113db2ddSJeff Roberson int32_t *sump; 1010113db2ddSJeff Roberson int32_t *lp; 1011113db2ddSJeff Roberson u_char *freemapp, *mapp; 1012e1c27cf7SKirk McKusick int i, start, end, forw, back, map; 1013e1c27cf7SKirk McKusick u_int bit; 1014113db2ddSJeff Roberson 1015113db2ddSJeff Roberson if (fs->fs_contigsumsize <= 0) 1016113db2ddSJeff Roberson return; 1017113db2ddSJeff Roberson freemapp = cg_clustersfree(cgp); 1018113db2ddSJeff Roberson sump = cg_clustersum(cgp); 1019113db2ddSJeff Roberson /* 1020113db2ddSJeff Roberson * Allocate or clear the actual block. 1021113db2ddSJeff Roberson */ 1022113db2ddSJeff Roberson if (cnt > 0) 1023113db2ddSJeff Roberson setbit(freemapp, blkno); 1024113db2ddSJeff Roberson else 1025113db2ddSJeff Roberson clrbit(freemapp, blkno); 1026113db2ddSJeff Roberson /* 1027113db2ddSJeff Roberson * Find the size of the cluster going forward. 1028113db2ddSJeff Roberson */ 1029113db2ddSJeff Roberson start = blkno + 1; 1030113db2ddSJeff Roberson end = start + fs->fs_contigsumsize; 1031113db2ddSJeff Roberson if (end >= cgp->cg_nclusterblks) 1032113db2ddSJeff Roberson end = cgp->cg_nclusterblks; 1033113db2ddSJeff Roberson mapp = &freemapp[start / NBBY]; 1034113db2ddSJeff Roberson map = *mapp++; 1035e1c27cf7SKirk McKusick bit = 1U << (start % NBBY); 1036113db2ddSJeff Roberson for (i = start; i < end; i++) { 1037113db2ddSJeff Roberson if ((map & bit) == 0) 1038113db2ddSJeff Roberson break; 1039113db2ddSJeff Roberson if ((i & (NBBY - 1)) != (NBBY - 1)) { 1040113db2ddSJeff Roberson bit <<= 1; 1041113db2ddSJeff Roberson } else { 1042113db2ddSJeff Roberson map = *mapp++; 1043113db2ddSJeff Roberson bit = 1; 1044113db2ddSJeff Roberson } 1045113db2ddSJeff Roberson } 1046113db2ddSJeff Roberson forw = i - start; 1047113db2ddSJeff Roberson /* 1048113db2ddSJeff Roberson * Find the size of the cluster going backward. 1049113db2ddSJeff Roberson */ 1050113db2ddSJeff Roberson start = blkno - 1; 1051113db2ddSJeff Roberson end = start - fs->fs_contigsumsize; 1052113db2ddSJeff Roberson if (end < 0) 1053113db2ddSJeff Roberson end = -1; 1054113db2ddSJeff Roberson mapp = &freemapp[start / NBBY]; 1055113db2ddSJeff Roberson map = *mapp--; 1056e1c27cf7SKirk McKusick bit = 1U << (start % NBBY); 1057113db2ddSJeff Roberson for (i = start; i > end; i--) { 1058113db2ddSJeff Roberson if ((map & bit) == 0) 1059113db2ddSJeff Roberson break; 1060113db2ddSJeff Roberson if ((i & (NBBY - 1)) != 0) { 1061113db2ddSJeff Roberson bit >>= 1; 1062113db2ddSJeff Roberson } else { 1063113db2ddSJeff Roberson map = *mapp--; 1064e1c27cf7SKirk McKusick bit = 1U << (NBBY - 1); 1065113db2ddSJeff Roberson } 1066113db2ddSJeff Roberson } 1067113db2ddSJeff Roberson back = start - i; 1068113db2ddSJeff Roberson /* 1069113db2ddSJeff Roberson * Account for old cluster and the possibly new forward and 1070113db2ddSJeff Roberson * back clusters. 1071113db2ddSJeff Roberson */ 1072113db2ddSJeff Roberson i = back + forw + 1; 1073113db2ddSJeff Roberson if (i > fs->fs_contigsumsize) 1074113db2ddSJeff Roberson i = fs->fs_contigsumsize; 1075113db2ddSJeff Roberson sump[i] += cnt; 1076113db2ddSJeff Roberson if (back > 0) 1077113db2ddSJeff Roberson sump[back] -= cnt; 1078113db2ddSJeff Roberson if (forw > 0) 1079113db2ddSJeff Roberson sump[forw] -= cnt; 1080113db2ddSJeff Roberson /* 1081113db2ddSJeff Roberson * Update cluster summary information. 1082113db2ddSJeff Roberson */ 1083113db2ddSJeff Roberson lp = &sump[fs->fs_contigsumsize]; 1084113db2ddSJeff Roberson for (i = fs->fs_contigsumsize; i > 0; i--) 1085113db2ddSJeff Roberson if (*lp-- > 0) 1086113db2ddSJeff Roberson break; 1087113db2ddSJeff Roberson fs->fs_maxcluster[cgp->cg_cgx] = i; 1088113db2ddSJeff Roberson } 1089