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 */
31df8bae1dSRodney W. Grimes
32df8bae1dSRodney W. Grimes #include <sys/param.h>
33b13110e9SAlfredo Dal'Ava Junior #include <sys/endian.h>
34076002f2SKirk McKusick #include <sys/limits.h>
35df8bae1dSRodney W. Grimes
36c4473420SPeter Wemm #ifndef _KERNEL
37dffce215SKirk McKusick #include <stdio.h>
38dffce215SKirk McKusick #include <string.h>
39dffce215SKirk McKusick #include <stdlib.h>
40dffce215SKirk McKusick #include <time.h>
41dffce215SKirk McKusick #include <sys/errno.h>
42996c772fSJohn Dyson #include <ufs/ufs/dinode.h>
431c85e6a3SKirk McKusick #include <ufs/ffs/fs.h>
44dffce215SKirk McKusick
45ec888383SKirk McKusick uint32_t calculate_crc32c(uint32_t, const void *, size_t);
46ade67b50SKirk McKusick uint32_t ffs_calc_sbhash(struct fs *);
47dffce215SKirk McKusick struct malloc_type;
48dffce215SKirk McKusick #define UFS_MALLOC(size, type, flags) malloc(size)
49dffce215SKirk McKusick #define UFS_FREE(ptr, type) free(ptr)
50076002f2SKirk McKusick #define maxphys MAXPHYS
51dffce215SKirk McKusick
52dffce215SKirk McKusick #else /* _KERNEL */
53df8bae1dSRodney W. Grimes #include <sys/systm.h>
54f89d2072SXin LI #include <sys/gsb_crc32.h>
551cd52ec3SBruce Evans #include <sys/lock.h>
561c85e6a3SKirk McKusick #include <sys/malloc.h>
571c85e6a3SKirk McKusick #include <sys/mount.h>
58df8bae1dSRodney W. Grimes #include <sys/vnode.h>
599626b608SPoul-Henning Kamp #include <sys/bio.h>
60df8bae1dSRodney W. Grimes #include <sys/buf.h>
6108637435SBruce Evans #include <sys/ucred.h>
6208637435SBruce Evans
63df8bae1dSRodney W. Grimes #include <ufs/ufs/quota.h>
64df8bae1dSRodney W. Grimes #include <ufs/ufs/inode.h>
651c85e6a3SKirk McKusick #include <ufs/ufs/extattr.h>
661c85e6a3SKirk McKusick #include <ufs/ufs/ufsmount.h>
671c85e6a3SKirk McKusick #include <ufs/ufs/ufs_extern.h>
68996c772fSJohn Dyson #include <ufs/ffs/ffs_extern.h>
691c85e6a3SKirk McKusick #include <ufs/ffs/fs.h>
70df8bae1dSRodney W. Grimes
71dffce215SKirk McKusick #define UFS_MALLOC(size, type, flags) malloc(size, type, flags)
72dffce215SKirk McKusick #define UFS_FREE(ptr, type) free(ptr, type)
73dffce215SKirk McKusick
74fb14e73cSKirk McKusick #endif /* _KERNEL */
75df8bae1dSRodney W. Grimes
76df8bae1dSRodney W. Grimes /*
778f829a5cSKirk McKusick * Verify an inode check-hash.
788f829a5cSKirk McKusick */
798f829a5cSKirk McKusick int
ffs_verify_dinode_ckhash(struct fs * fs,struct ufs2_dinode * dip)808f829a5cSKirk McKusick ffs_verify_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip)
818f829a5cSKirk McKusick {
82c8f55fc4SKirk McKusick uint32_t ckhash, save_ckhash;
838f829a5cSKirk McKusick
848f829a5cSKirk McKusick /*
858f829a5cSKirk McKusick * Return success if unallocated or we are not doing inode check-hash.
868f829a5cSKirk McKusick */
878f829a5cSKirk McKusick if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0)
888f829a5cSKirk McKusick return (0);
898f829a5cSKirk McKusick /*
908f829a5cSKirk McKusick * Exclude di_ckhash from the crc32 calculation, e.g., always use
918f829a5cSKirk McKusick * a check-hash value of zero when calculating the check-hash.
928f829a5cSKirk McKusick */
938f829a5cSKirk McKusick save_ckhash = dip->di_ckhash;
948f829a5cSKirk McKusick dip->di_ckhash = 0;
95c8f55fc4SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip));
968f829a5cSKirk McKusick dip->di_ckhash = save_ckhash;
97c8f55fc4SKirk McKusick if (save_ckhash == ckhash)
988f829a5cSKirk McKusick return (0);
99c8f55fc4SKirk McKusick return (EINVAL);
1008f829a5cSKirk McKusick }
1018f829a5cSKirk McKusick
1028f829a5cSKirk McKusick /*
1038f829a5cSKirk McKusick * Update an inode check-hash.
1048f829a5cSKirk McKusick */
1058f829a5cSKirk McKusick void
ffs_update_dinode_ckhash(struct fs * fs,struct ufs2_dinode * dip)1068f829a5cSKirk McKusick ffs_update_dinode_ckhash(struct fs *fs, struct ufs2_dinode *dip)
1078f829a5cSKirk McKusick {
1088f829a5cSKirk McKusick
1098f829a5cSKirk McKusick if (dip->di_mode == 0 || (fs->fs_metackhash & CK_INODE) == 0)
1108f829a5cSKirk McKusick return;
1118f829a5cSKirk McKusick /*
1128f829a5cSKirk McKusick * Exclude old di_ckhash from the crc32 calculation, e.g., always use
1138f829a5cSKirk McKusick * a check-hash value of zero when calculating the new check-hash.
1148f829a5cSKirk McKusick */
1158f829a5cSKirk McKusick dip->di_ckhash = 0;
1168f829a5cSKirk McKusick dip->di_ckhash = calculate_crc32c(~0L, (void *)dip, sizeof(*dip));
1178f829a5cSKirk McKusick }
1188f829a5cSKirk McKusick
1198f829a5cSKirk McKusick /*
120dffce215SKirk McKusick * These are the low-level functions that actually read and write
121dffce215SKirk McKusick * the superblock and its associated data.
122dffce215SKirk McKusick */
123dffce215SKirk McKusick static off_t sblock_try[] = SBLOCKSEARCH;
124b21582eeSKirk McKusick static int readsuper(void *, struct fs **, off_t, int,
125dffce215SKirk McKusick int (*)(void *, off_t, void **, int));
126076002f2SKirk McKusick static int validate_sblock(struct fs *, int);
127dffce215SKirk McKusick
128dffce215SKirk McKusick /*
129dffce215SKirk McKusick * Read a superblock from the devfd device.
130dffce215SKirk McKusick *
131dffce215SKirk McKusick * If an alternate superblock is specified, it is read. Otherwise the
132dffce215SKirk McKusick * set of locations given in the SBLOCKSEARCH list is searched for a
133dffce215SKirk McKusick * superblock. Memory is allocated for the superblock by the readfunc and
134dffce215SKirk McKusick * is returned. If filltype is non-NULL, additional memory is allocated
135dffce215SKirk McKusick * of type filltype and filled in with the superblock summary information.
136efbf3964SKirk McKusick * All memory is freed when any error is returned.
137dffce215SKirk McKusick *
138dffce215SKirk McKusick * If a superblock is found, zero is returned. Otherwise one of the
139dffce215SKirk McKusick * following error values is returned:
140dffce215SKirk McKusick * EIO: non-existent or truncated superblock.
141dffce215SKirk McKusick * EIO: error reading summary information.
142dffce215SKirk McKusick * ENOENT: no usable known superblock found.
143b13110e9SAlfredo Dal'Ava Junior * EILSEQ: filesystem with wrong byte order found.
144076002f2SKirk McKusick * ENOMEM: failed to allocate space for the superblock.
145dffce215SKirk McKusick * EINVAL: The previous newfs operation on this volume did not complete.
146dffce215SKirk McKusick * The administrator must complete newfs before using this volume.
147dffce215SKirk McKusick */
148dffce215SKirk McKusick int
ffs_sbget(void * devfd,struct fs ** fsp,off_t sblock,int flags,struct malloc_type * filltype,int (* readfunc)(void * devfd,off_t loc,void ** bufp,int size))149b21582eeSKirk McKusick ffs_sbget(void *devfd, struct fs **fsp, off_t sblock, int flags,
150dffce215SKirk McKusick struct malloc_type *filltype,
151dffce215SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size))
152dffce215SKirk McKusick {
153dffce215SKirk McKusick struct fs *fs;
15434816cb9SKirk McKusick struct fs_summary_info *fs_si;
155076002f2SKirk McKusick int i, error;
156076002f2SKirk McKusick uint64_t size, blks;
157dffce215SKirk McKusick uint8_t *space;
158dffce215SKirk McKusick int32_t *lp;
159dffce215SKirk McKusick char *buf;
160dffce215SKirk McKusick
161efbf3964SKirk McKusick fs = NULL;
16216759360SMark Johnston *fsp = NULL;
163b21582eeSKirk McKusick if (sblock != UFS_STDSB) {
164b21582eeSKirk McKusick if ((error = readsuper(devfd, &fs, sblock,
165b21582eeSKirk McKusick flags | UFS_ALTSBLK, readfunc)) != 0) {
166efbf3964SKirk McKusick if (fs != NULL)
167efbf3964SKirk McKusick UFS_FREE(fs, filltype);
1684cbd996aSKirk McKusick return (error);
169efbf3964SKirk McKusick }
170dffce215SKirk McKusick } else {
171dffce215SKirk McKusick for (i = 0; sblock_try[i] != -1; i++) {
172b21582eeSKirk McKusick if ((error = readsuper(devfd, &fs, sblock_try[i],
173b21582eeSKirk McKusick flags, readfunc)) == 0) {
174b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0) {
175b21582eeSKirk McKusick *fsp = fs;
176b21582eeSKirk McKusick return (0);
177b21582eeSKirk McKusick }
178dffce215SKirk McKusick break;
179b21582eeSKirk McKusick }
180efbf3964SKirk McKusick if (fs != NULL) {
181efbf3964SKirk McKusick UFS_FREE(fs, filltype);
182efbf3964SKirk McKusick fs = NULL;
183efbf3964SKirk McKusick }
1844cbd996aSKirk McKusick if (error == ENOENT)
185dffce215SKirk McKusick continue;
1864cbd996aSKirk McKusick return (error);
187dffce215SKirk McKusick }
188dffce215SKirk McKusick if (sblock_try[i] == -1)
189dffce215SKirk McKusick return (ENOENT);
190dffce215SKirk McKusick }
191dffce215SKirk McKusick /*
192dffce215SKirk McKusick * Read in the superblock summary information.
193dffce215SKirk McKusick */
194dffce215SKirk McKusick size = fs->fs_cssize;
195dffce215SKirk McKusick blks = howmany(size, fs->fs_fsize);
196dffce215SKirk McKusick if (fs->fs_contigsumsize > 0)
197dffce215SKirk McKusick size += fs->fs_ncg * sizeof(int32_t);
198831b1ff7SKirk McKusick size += fs->fs_ncg * sizeof(uint8_t);
199076002f2SKirk McKusick if ((fs_si = UFS_MALLOC(sizeof(*fs_si), filltype, M_NOWAIT)) == NULL) {
20034816cb9SKirk McKusick UFS_FREE(fs, filltype);
201076002f2SKirk McKusick return (ENOMEM);
20234816cb9SKirk McKusick }
20334816cb9SKirk McKusick bzero(fs_si, sizeof(*fs_si));
20434816cb9SKirk McKusick fs->fs_si = fs_si;
205076002f2SKirk McKusick if ((space = UFS_MALLOC(size, filltype, M_NOWAIT)) == NULL) {
20634816cb9SKirk McKusick UFS_FREE(fs->fs_si, filltype);
207efbf3964SKirk McKusick UFS_FREE(fs, filltype);
208076002f2SKirk McKusick return (ENOMEM);
209efbf3964SKirk McKusick }
210dffce215SKirk McKusick fs->fs_csp = (struct csum *)space;
211dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) {
212dffce215SKirk McKusick size = fs->fs_bsize;
213dffce215SKirk McKusick if (i + fs->fs_frag > blks)
214dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize;
21516759360SMark Johnston buf = NULL;
2164cbd996aSKirk McKusick error = (*readfunc)(devfd,
217dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)), (void **)&buf, size);
2184cbd996aSKirk McKusick if (error) {
219efbf3964SKirk McKusick if (buf != NULL)
22016759360SMark Johnston UFS_FREE(buf, filltype);
221dffce215SKirk McKusick UFS_FREE(fs->fs_csp, filltype);
22234816cb9SKirk McKusick UFS_FREE(fs->fs_si, filltype);
223efbf3964SKirk McKusick UFS_FREE(fs, filltype);
2244cbd996aSKirk McKusick return (error);
225dffce215SKirk McKusick }
226dffce215SKirk McKusick memcpy(space, buf, size);
227dffce215SKirk McKusick UFS_FREE(buf, filltype);
228dffce215SKirk McKusick space += size;
229dffce215SKirk McKusick }
230dffce215SKirk McKusick if (fs->fs_contigsumsize > 0) {
231dffce215SKirk McKusick fs->fs_maxcluster = lp = (int32_t *)space;
232dffce215SKirk McKusick for (i = 0; i < fs->fs_ncg; i++)
233dffce215SKirk McKusick *lp++ = fs->fs_contigsumsize;
234dffce215SKirk McKusick space = (uint8_t *)lp;
235dffce215SKirk McKusick }
236831b1ff7SKirk McKusick size = fs->fs_ncg * sizeof(uint8_t);
237831b1ff7SKirk McKusick fs->fs_contigdirs = (uint8_t *)space;
238dffce215SKirk McKusick bzero(fs->fs_contigdirs, size);
239efbf3964SKirk McKusick *fsp = fs;
240dffce215SKirk McKusick return (0);
241dffce215SKirk McKusick }
242dffce215SKirk McKusick
243dffce215SKirk McKusick /*
244dffce215SKirk McKusick * Try to read a superblock from the location specified by sblockloc.
245dffce215SKirk McKusick * Return zero on success or an errno on failure.
246dffce215SKirk McKusick */
247dffce215SKirk McKusick static int
readsuper(void * devfd,struct fs ** fsp,off_t sblockloc,int flags,int (* readfunc)(void * devfd,off_t loc,void ** bufp,int size))248b21582eeSKirk McKusick readsuper(void *devfd, struct fs **fsp, off_t sblockloc, int flags,
249b21582eeSKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size))
250dffce215SKirk McKusick {
251dffce215SKirk McKusick struct fs *fs;
252ec888383SKirk McKusick int error, res;
253ec888383SKirk McKusick uint32_t ckhash;
254dffce215SKirk McKusick
255dffce215SKirk McKusick error = (*readfunc)(devfd, sblockloc, (void **)fsp, SBLOCKSIZE);
256dffce215SKirk McKusick if (error != 0)
257dffce215SKirk McKusick return (error);
258dffce215SKirk McKusick fs = *fsp;
259dffce215SKirk McKusick if (fs->fs_magic == FS_BAD_MAGIC)
260dffce215SKirk McKusick return (EINVAL);
26136e08b01SKirk McKusick /*
26236e08b01SKirk McKusick * For UFS1 with a 65536 block size, the first backup superblock
26336e08b01SKirk McKusick * is at the same location as the UFS2 superblock. Since SBLOCK_UFS2
26436e08b01SKirk McKusick * is the first location checked, the first backup is the superblock
26536e08b01SKirk McKusick * that will be accessed. Here we fail the lookup so that we can
26636e08b01SKirk McKusick * retry with the correct location for the UFS1 superblock.
26736e08b01SKirk McKusick */
268b21582eeSKirk McKusick if (fs->fs_magic == FS_UFS1_MAGIC && (flags & UFS_ALTSBLK) == 0 &&
26936e08b01SKirk McKusick fs->fs_bsize == SBLOCK_UFS2 && sblockloc == SBLOCK_UFS2)
27036e08b01SKirk McKusick return (ENOENT);
271b21582eeSKirk McKusick if ((error = validate_sblock(fs, flags)) > 0)
272076002f2SKirk McKusick return (error);
273a02bd3e3SKirk McKusick /*
274a02bd3e3SKirk McKusick * If the filesystem has been run on a kernel without
275a02bd3e3SKirk McKusick * metadata check hashes, disable them.
276a02bd3e3SKirk McKusick */
277a02bd3e3SKirk McKusick if ((fs->fs_flags & FS_METACKHASH) == 0)
278a02bd3e3SKirk McKusick fs->fs_metackhash = 0;
279996d40f9SKirk McKusick /*
280996d40f9SKirk McKusick * Clear any check-hashes that are not maintained
281996d40f9SKirk McKusick * by this kernel. Also clear any unsupported flags.
282996d40f9SKirk McKusick */
283996d40f9SKirk McKusick fs->fs_metackhash &= CK_SUPPORTED;
284996d40f9SKirk McKusick fs->fs_flags &= FS_SUPPORTED;
285ade67b50SKirk McKusick if (fs->fs_ckhash != (ckhash = ffs_calc_sbhash(fs))) {
286b21582eeSKirk McKusick if ((flags & (UFS_NOMSG | UFS_NOHASHFAIL)) ==
287b21582eeSKirk McKusick (UFS_NOMSG | UFS_NOHASHFAIL))
288f2b39152SKirk McKusick return (0);
289b21582eeSKirk McKusick if ((flags & UFS_NOMSG) != 0)
290b21582eeSKirk McKusick return (EINTEGRITY);
291ec888383SKirk McKusick #ifdef _KERNEL
292ec888383SKirk McKusick res = uprintf("Superblock check-hash failed: recorded "
293fb14e73cSKirk McKusick "check-hash 0x%x != computed check-hash 0x%x%s\n",
294fb14e73cSKirk McKusick fs->fs_ckhash, ckhash,
295b21582eeSKirk McKusick (flags & UFS_NOHASHFAIL) != 0 ? " (Ignored)" : "");
296ec888383SKirk McKusick #else
297ec888383SKirk McKusick res = 0;
298ec888383SKirk McKusick #endif
299ec888383SKirk McKusick /*
300ec888383SKirk McKusick * Print check-hash failure if no controlling terminal
301ec888383SKirk McKusick * in kernel or always if in user-mode (libufs).
302ec888383SKirk McKusick */
303ec888383SKirk McKusick if (res == 0)
304ec888383SKirk McKusick printf("Superblock check-hash failed: recorded "
305ec888383SKirk McKusick "check-hash 0x%x != computed check-hash "
306fb14e73cSKirk McKusick "0x%x%s\n", fs->fs_ckhash, ckhash,
307b21582eeSKirk McKusick (flags & UFS_NOHASHFAIL) ? " (Ignored)" : "");
308b21582eeSKirk McKusick if ((flags & UFS_NOHASHFAIL) != 0)
309fb14e73cSKirk McKusick return (0);
310b21582eeSKirk McKusick return (EINTEGRITY);
311fb14e73cSKirk McKusick }
312dffce215SKirk McKusick /* Have to set for old filesystems that predate this field */
313dffce215SKirk McKusick fs->fs_sblockactualloc = sblockloc;
314efbf3964SKirk McKusick /* Not yet any summary information */
31534816cb9SKirk McKusick fs->fs_si = NULL;
316dffce215SKirk McKusick return (0);
317dffce215SKirk McKusick }
318dffce215SKirk McKusick
319dffce215SKirk McKusick /*
320076002f2SKirk McKusick * Verify the filesystem values.
321076002f2SKirk McKusick */
322076002f2SKirk McKusick #define ILOG2(num) (fls(num) - 1)
32314821130SWarner Losh #ifdef STANDALONE_SMALL
32414821130SWarner Losh #define MPRINT(...) do { } while (0)
32514821130SWarner Losh #else
32614821130SWarner Losh #define MPRINT(...) if (prtmsg) printf(__VA_ARGS__)
32714821130SWarner Losh #endif
328d22531d5SKirk McKusick #define FCHK(lhs, op, rhs, fmt) \
32950dc4c7dSKirk McKusick if (lhs op rhs) { \
330b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \
33150dc4c7dSKirk McKusick #fmt ")\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, \
33250dc4c7dSKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs); \
333f0be378aSKirk McKusick if (error < 0) \
334f0be378aSKirk McKusick return (ENOENT); \
335b21582eeSKirk McKusick if (error == 0) \
336b21582eeSKirk McKusick error = ENOENT; \
33750dc4c7dSKirk McKusick }
338d22531d5SKirk McKusick #define WCHK(lhs, op, rhs, fmt) \
339d22531d5SKirk McKusick if (lhs op rhs) { \
340d22531d5SKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \
341d22531d5SKirk McKusick #fmt ")%s\n", fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2,\
342d22531d5SKirk McKusick #lhs, (intmax_t)lhs, #op, #rhs, (intmax_t)rhs, wmsg);\
343d22531d5SKirk McKusick if (error == 0) \
344d22531d5SKirk McKusick error = warnerr; \
3450eabe330SKirk McKusick if (warnerr == 0) \
3460eabe330SKirk McKusick lhs = rhs; \
347d22531d5SKirk McKusick }
348d22531d5SKirk McKusick #define FCHK2(lhs1, op1, rhs1, lhs2, op2, rhs2, fmt) \
34950dc4c7dSKirk McKusick if (lhs1 op1 rhs1 && lhs2 op2 rhs2) { \
350b21582eeSKirk McKusick MPRINT("UFS%d superblock failed: %s (" #fmt ") %s %s (" \
35150dc4c7dSKirk McKusick #fmt ") && %s (" #fmt ") %s %s (" #fmt ")\n", \
35250dc4c7dSKirk McKusick fs->fs_magic == FS_UFS1_MAGIC ? 1 : 2, #lhs1, \
35350dc4c7dSKirk McKusick (intmax_t)lhs1, #op1, #rhs1, (intmax_t)rhs1, #lhs2, \
35450dc4c7dSKirk McKusick (intmax_t)lhs2, #op2, #rhs2, (intmax_t)rhs2); \
355f0be378aSKirk McKusick if (error < 0) \
356f0be378aSKirk McKusick return (ENOENT); \
357b21582eeSKirk McKusick if (error == 0) \
358b21582eeSKirk McKusick error = ENOENT; \
35950dc4c7dSKirk McKusick }
360076002f2SKirk McKusick
361076002f2SKirk McKusick static int
validate_sblock(struct fs * fs,int flags)362b21582eeSKirk McKusick validate_sblock(struct fs *fs, int flags)
363076002f2SKirk McKusick {
364831b1ff7SKirk McKusick uint64_t i, sectorsize;
365831b1ff7SKirk McKusick uint64_t maxfilesize, sizepb;
366d22531d5SKirk McKusick int error, prtmsg, warnerr;
367d22531d5SKirk McKusick char *wmsg;
368076002f2SKirk McKusick
369b21582eeSKirk McKusick error = 0;
370076002f2SKirk McKusick sectorsize = dbtob(1);
371b21582eeSKirk McKusick prtmsg = ((flags & UFS_NOMSG) == 0);
372d22531d5SKirk McKusick warnerr = (flags & UFS_NOWARNFAIL) == UFS_NOWARNFAIL ? 0 : ENOENT;
373d22531d5SKirk McKusick wmsg = warnerr ? "" : " (Ignored)";
374e6886616SKirk McKusick /*
375b13110e9SAlfredo Dal'Ava Junior * Check for endian mismatch between machine and filesystem.
376b13110e9SAlfredo Dal'Ava Junior */
377b13110e9SAlfredo Dal'Ava Junior if (((fs->fs_magic != FS_UFS2_MAGIC) &&
378b13110e9SAlfredo Dal'Ava Junior (bswap32(fs->fs_magic) == FS_UFS2_MAGIC)) ||
379b13110e9SAlfredo Dal'Ava Junior ((fs->fs_magic != FS_UFS1_MAGIC) &&
380b13110e9SAlfredo Dal'Ava Junior (bswap32(fs->fs_magic) == FS_UFS1_MAGIC))) {
381b13110e9SAlfredo Dal'Ava Junior MPRINT("UFS superblock failed due to endian mismatch "
382b13110e9SAlfredo Dal'Ava Junior "between machine and filesystem\n");
383b13110e9SAlfredo Dal'Ava Junior return(EILSEQ);
384b13110e9SAlfredo Dal'Ava Junior }
385b13110e9SAlfredo Dal'Ava Junior /*
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);
4210eabe330SKirk McKusick FCHK(CGSIZE(fs), >, fs->fs_bsize, %jd);
4220eabe330SKirk McKusick /* Only need to validate these if reading in csum data */
4230eabe330SKirk McKusick if ((flags & UFS_NOCSUM) != 0)
4240eabe330SKirk McKusick return (error);
425831b1ff7SKirk McKusick FCHK((uint64_t)fs->fs_ipg * fs->fs_ncg, >,
4260eabe330SKirk McKusick (((int64_t)(1)) << 32) - INOPB(fs), %jd);
4270eabe330SKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, <, 0, %jd);
4280eabe330SKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, >,
429831b1ff7SKirk McKusick (uint64_t)fs->fs_ipg * fs->fs_ncg, %jd);
4300eabe330SKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, >,
431831b1ff7SKirk McKusick ((uint64_t)fs->fs_ipg * fs->fs_ncg) -
4320eabe330SKirk McKusick fs->fs_cstotal.cs_nifree, %jd);
4330eabe330SKirk McKusick FCHK(fs->fs_size, <, 8 * fs->fs_frag, %jd);
4340eabe330SKirk McKusick FCHK(fs->fs_size, <=, ((int64_t)fs->fs_ncg - 1) * fs->fs_fpg,
4350eabe330SKirk McKusick %jd);
4360eabe330SKirk McKusick FCHK(fs->fs_size, >, (int64_t)fs->fs_ncg * fs->fs_fpg, %jd);
4370eabe330SKirk McKusick FCHK(fs->fs_csaddr, <, 0, %jd);
4380eabe330SKirk McKusick FCHK(fs->fs_cssize, !=,
4390eabe330SKirk McKusick fragroundup(fs, fs->fs_ncg * sizeof(struct csum)), %jd);
440c79a1416SKirk McKusick FCHK(fs->fs_csaddr + howmany(fs->fs_cssize, fs->fs_fsize), >,
441c79a1416SKirk McKusick fs->fs_size, %jd);
4420eabe330SKirk McKusick FCHK(fs->fs_csaddr, <, cgdmin(fs, dtog(fs, fs->fs_csaddr)),
4430eabe330SKirk McKusick %jd);
4440eabe330SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr + howmany(fs->fs_cssize,
4450eabe330SKirk McKusick fs->fs_fsize)), >, dtog(fs, fs->fs_csaddr), %jd);
446e6886616SKirk McKusick return (error);
447e6886616SKirk McKusick }
448076002f2SKirk McKusick if (fs->fs_magic == FS_UFS2_MAGIC) {
449184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0)
450d22531d5SKirk McKusick FCHK2(fs->fs_sblockactualloc, !=, SBLOCK_UFS2,
45150dc4c7dSKirk McKusick fs->fs_sblockactualloc, !=, 0, %jd);
452d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, !=, SBLOCK_UFS2, %#jx);
453d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) *
45450dc4c7dSKirk McKusick sizeof(ufs2_daddr_t)), %jd);
455d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs2_daddr_t),
45650dc4c7dSKirk McKusick %jd);
457d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=,
458184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs2_dinode), %jd);
459076002f2SKirk McKusick } else if (fs->fs_magic == FS_UFS1_MAGIC) {
460184e3118SKirk McKusick if ((flags & UFS_ALTSBLK) == 0)
461d22531d5SKirk McKusick FCHK(fs->fs_sblockactualloc, >, SBLOCK_UFS1, %jd);
462d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, <, 0, %jd);
463d22531d5SKirk McKusick FCHK(fs->fs_sblockloc, >, SBLOCK_UFS1, %jd);
464d22531d5SKirk McKusick FCHK(fs->fs_nindir, !=, fs->fs_bsize / sizeof(ufs1_daddr_t),
46550dc4c7dSKirk McKusick %jd);
466d22531d5SKirk McKusick FCHK(fs->fs_inopb, !=,
467184e3118SKirk McKusick fs->fs_bsize / sizeof(struct ufs1_dinode), %jd);
468d22531d5SKirk McKusick FCHK(fs->fs_maxsymlinklen, !=, ((UFS_NDADDR + UFS_NIADDR) *
46950dc4c7dSKirk McKusick sizeof(ufs1_daddr_t)), %jd);
470d22531d5SKirk McKusick WCHK(fs->fs_old_inodefmt, !=, FS_44INODEFMT, %jd);
471d22531d5SKirk McKusick WCHK(fs->fs_old_rotdelay, !=, 0, %jd);
472d22531d5SKirk McKusick WCHK(fs->fs_old_rps, !=, 60, %jd);
473d22531d5SKirk McKusick WCHK(fs->fs_old_nspf, !=, fs->fs_fsize / sectorsize, %jd);
474d22531d5SKirk McKusick WCHK(fs->fs_old_interleave, !=, 1, %jd);
475d22531d5SKirk McKusick WCHK(fs->fs_old_trackskew, !=, 0, %jd);
476d22531d5SKirk McKusick WCHK(fs->fs_old_cpc, !=, 0, %jd);
477d22531d5SKirk McKusick WCHK(fs->fs_old_postblformat, !=, 1, %jd);
478f0be378aSKirk McKusick FCHK(fs->fs_old_nrpos, !=, 1, %jd);
479d22531d5SKirk McKusick WCHK(fs->fs_old_nsect, !=, fs->fs_old_spc, %jd);
480d22531d5SKirk McKusick WCHK(fs->fs_old_npsect, !=, fs->fs_old_spc, %jd);
481076002f2SKirk McKusick } else {
48250dc4c7dSKirk McKusick /* Bad magic number, so assume not a superblock */
483076002f2SKirk McKusick return (ENOENT);
484076002f2SKirk McKusick }
485d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, MINBSIZE, %jd);
486d22531d5SKirk McKusick FCHK(fs->fs_bsize, >, MAXBSIZE, %jd);
487d22531d5SKirk McKusick FCHK(fs->fs_bsize, <, roundup(sizeof(struct fs), DEV_BSIZE), %jd);
488d22531d5SKirk McKusick FCHK(powerof2(fs->fs_bsize), ==, 0, %jd);
489d22531d5SKirk McKusick FCHK(fs->fs_frag, <, 1, %jd);
490d22531d5SKirk McKusick FCHK(fs->fs_frag, >, MAXFRAG, %jd);
491d22531d5SKirk McKusick FCHK(fs->fs_frag, !=, numfrags(fs, fs->fs_bsize), %jd);
492d22531d5SKirk McKusick FCHK(fs->fs_fsize, <, sectorsize, %jd);
493d22531d5SKirk McKusick FCHK(fs->fs_fsize * fs->fs_frag, !=, fs->fs_bsize, %jd);
494d22531d5SKirk McKusick FCHK(powerof2(fs->fs_fsize), ==, 0, %jd);
495d22531d5SKirk McKusick FCHK(fs->fs_fpg, <, 3 * fs->fs_frag, %jd);
496d22531d5SKirk McKusick FCHK(fs->fs_ncg, <, 1, %jd);
497f0be378aSKirk McKusick FCHK(fs->fs_ipg, <, fs->fs_inopb, %jd);
498831b1ff7SKirk McKusick FCHK((uint64_t)fs->fs_ipg * fs->fs_ncg, >,
4998435a9b2SKirk McKusick (((int64_t)(1)) << 32) - INOPB(fs), %jd);
500f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, <, 0, %jd);
501831b1ff7SKirk McKusick FCHK(fs->fs_cstotal.cs_nifree, >, (uint64_t)fs->fs_ipg * fs->fs_ncg,
5028435a9b2SKirk McKusick %jd);
503f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, <, 0, %jd);
504f0be378aSKirk McKusick FCHK(fs->fs_cstotal.cs_ndir, >,
505831b1ff7SKirk McKusick ((uint64_t)fs->fs_ipg * fs->fs_ncg) - fs->fs_cstotal.cs_nifree,
5068435a9b2SKirk McKusick %jd);
507d22531d5SKirk McKusick FCHK(fs->fs_sbsize, >, SBLOCKSIZE, %jd);
508f0be378aSKirk McKusick FCHK(fs->fs_sbsize, <, (signed)sizeof(struct fs), %jd);
509a2d1957bSKirk McKusick /* fix for misconfigured filesystems */
510a2d1957bSKirk McKusick if (fs->fs_maxbsize == 0)
511a2d1957bSKirk McKusick fs->fs_maxbsize = fs->fs_bsize;
512d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, <, fs->fs_bsize, %jd);
513d22531d5SKirk McKusick FCHK(powerof2(fs->fs_maxbsize), ==, 0, %jd);
514d22531d5SKirk McKusick FCHK(fs->fs_maxbsize, >, FS_MAXCONTIG * fs->fs_bsize, %jd);
515d22531d5SKirk McKusick FCHK(fs->fs_bmask, !=, ~(fs->fs_bsize - 1), %#jx);
516d22531d5SKirk McKusick FCHK(fs->fs_fmask, !=, ~(fs->fs_fsize - 1), %#jx);
517d22531d5SKirk McKusick FCHK(fs->fs_qbmask, !=, ~fs->fs_bmask, %#jx);
518d22531d5SKirk McKusick FCHK(fs->fs_qfmask, !=, ~fs->fs_fmask, %#jx);
519d22531d5SKirk McKusick FCHK(fs->fs_bshift, !=, ILOG2(fs->fs_bsize), %jd);
520d22531d5SKirk McKusick FCHK(fs->fs_fshift, !=, ILOG2(fs->fs_fsize), %jd);
521d22531d5SKirk McKusick FCHK(fs->fs_fragshift, !=, ILOG2(fs->fs_frag), %jd);
522d22531d5SKirk McKusick FCHK(fs->fs_fsbtodb, !=, ILOG2(fs->fs_fsize / sectorsize), %jd);
523d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset, <, 0, %jd);
524d22531d5SKirk McKusick FCHK2(fs->fs_old_cgoffset, >, 0, ~fs->fs_old_cgmask, <, 0, %jd);
525d22531d5SKirk McKusick FCHK(fs->fs_old_cgoffset * (~fs->fs_old_cgmask), >, fs->fs_fpg, %jd);
5260eabe330SKirk McKusick FCHK(CGSIZE(fs), >, fs->fs_bsize, %jd);
527f0be378aSKirk McKusick /*
528f0be378aSKirk McKusick * If anything has failed up to this point, it is usafe to proceed
529f0be378aSKirk McKusick * as checks below may divide by zero or make other fatal calculations.
530f0be378aSKirk McKusick * So if we have any errors at this point, give up.
531f0be378aSKirk McKusick */
532f0be378aSKirk McKusick if (error)
533f0be378aSKirk McKusick return (error);
534e15d8f23SKirk McKusick FCHK(fs->fs_sbsize % sectorsize, !=, 0, %jd);
5359dee5da7SKirk McKusick FCHK(fs->fs_ipg % fs->fs_inopb, !=, 0, %jd);
536d22531d5SKirk McKusick FCHK(fs->fs_sblkno, !=, roundup(
53750dc4c7dSKirk McKusick howmany(fs->fs_sblockloc + SBLOCKSIZE, fs->fs_fsize),
53850dc4c7dSKirk McKusick fs->fs_frag), %jd);
539d22531d5SKirk McKusick FCHK(fs->fs_cblkno, !=, fs->fs_sblkno +
54050dc4c7dSKirk McKusick roundup(howmany(SBLOCKSIZE, fs->fs_fsize), fs->fs_frag), %jd);
541d22531d5SKirk McKusick FCHK(fs->fs_iblkno, !=, fs->fs_cblkno + fs->fs_frag, %jd);
542d22531d5SKirk McKusick FCHK(fs->fs_dblkno, !=, fs->fs_iblkno + fs->fs_ipg / INOPF(fs), %jd);
543d22531d5SKirk McKusick FCHK(fs->fs_cgsize, >, fs->fs_bsize, %jd);
544f0be378aSKirk McKusick FCHK(fs->fs_cgsize, <, fs->fs_fsize, %jd);
545f0be378aSKirk McKusick FCHK(fs->fs_cgsize % fs->fs_fsize, !=, 0, %jd);
5465bc926afSKirk McKusick /*
5475bc926afSKirk McKusick * This test is valid, however older versions of growfs failed
5485bc926afSKirk McKusick * to correctly update fs_dsize so will fail this test. Thus we
5495bc926afSKirk McKusick * exclude it from the requirements.
5505bc926afSKirk McKusick */
5515bc926afSKirk McKusick #ifdef notdef
552d22531d5SKirk McKusick WCHK(fs->fs_dsize, !=, fs->fs_size - fs->fs_sblkno -
553076002f2SKirk McKusick fs->fs_ncg * (fs->fs_dblkno - fs->fs_sblkno) -
55450dc4c7dSKirk McKusick howmany(fs->fs_cssize, fs->fs_fsize), %jd);
5555bc926afSKirk McKusick #endif
556d22531d5SKirk McKusick WCHK(fs->fs_metaspace, <, 0, %jd);
557d22531d5SKirk McKusick WCHK(fs->fs_metaspace, >, fs->fs_fpg / 2, %jd);
558d22531d5SKirk McKusick WCHK(fs->fs_minfree, >, 99, %jd%%);
559076002f2SKirk McKusick maxfilesize = fs->fs_bsize * UFS_NDADDR - 1;
560076002f2SKirk McKusick for (sizepb = fs->fs_bsize, i = 0; i < UFS_NIADDR; i++) {
561076002f2SKirk McKusick sizepb *= NINDIR(fs);
562076002f2SKirk McKusick maxfilesize += sizepb;
563076002f2SKirk McKusick }
564d22531d5SKirk McKusick WCHK(fs->fs_maxfilesize, !=, maxfilesize, %jd);
565076002f2SKirk McKusick /*
566076002f2SKirk McKusick * These values have a tight interaction with each other that
567076002f2SKirk McKusick * makes it hard to tightly bound them. So we can only check
568076002f2SKirk McKusick * that they are within a broader possible range.
569076002f2SKirk McKusick *
570f3f5368dSKirk McKusick * The size cannot always be accurately determined, but ensure
571f3f5368dSKirk McKusick * that it is consistent with the number of cylinder groups (fs_ncg)
572f3f5368dSKirk McKusick * and the number of fragments per cylinder group (fs_fpg). Ensure
573f3f5368dSKirk McKusick * that the summary information size is correct and that it starts
574f3f5368dSKirk McKusick * and ends in the data area of the same cylinder group.
575076002f2SKirk McKusick */
576d22531d5SKirk McKusick FCHK(fs->fs_size, <, 8 * fs->fs_frag, %jd);
577017367c1SKonstantin Belousov FCHK(fs->fs_size, <=, ((int64_t)fs->fs_ncg - 1) * fs->fs_fpg, %jd);
578017367c1SKonstantin Belousov FCHK(fs->fs_size, >, (int64_t)fs->fs_ncg * fs->fs_fpg, %jd);
579b21582eeSKirk McKusick /*
580b21582eeSKirk McKusick * If we are not requested to read in the csum data stop here
581b21582eeSKirk McKusick * as the correctness of the remaining values is only important
582b21582eeSKirk McKusick * to bound the space needed to be allocated to hold the csum data.
583b21582eeSKirk McKusick */
584b21582eeSKirk McKusick if ((flags & UFS_NOCSUM) != 0)
585b21582eeSKirk McKusick return (error);
586d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, 0, %jd);
587d22531d5SKirk McKusick FCHK(fs->fs_cssize, !=,
588f3f5368dSKirk McKusick fragroundup(fs, fs->fs_ncg * sizeof(struct csum)), %jd);
589c79a1416SKirk McKusick FCHK(fs->fs_csaddr + howmany(fs->fs_cssize, fs->fs_fsize), >,
590c79a1416SKirk McKusick fs->fs_size, %jd);
591d22531d5SKirk McKusick FCHK(fs->fs_csaddr, <, cgdmin(fs, dtog(fs, fs->fs_csaddr)), %jd);
592d22531d5SKirk McKusick FCHK(dtog(fs, fs->fs_csaddr + howmany(fs->fs_cssize, fs->fs_fsize)), >,
593548045bfSKirk McKusick dtog(fs, fs->fs_csaddr), %jd);
594076002f2SKirk McKusick /*
595bc218d89SKirk McKusick * With file system clustering it is possible to allocate
596bc218d89SKirk McKusick * many contiguous blocks. The kernel variable maxphys defines
597bc218d89SKirk McKusick * the maximum transfer size permitted by the controller and/or
598bc218d89SKirk McKusick * buffering. The fs_maxcontig parameter controls the maximum
599bc218d89SKirk McKusick * number of blocks that the filesystem will read or write
600bc218d89SKirk McKusick * in a single transfer. It is calculated when the filesystem
601bc218d89SKirk McKusick * is created as maxphys / fs_bsize. The loader uses a maxphys
602bc218d89SKirk McKusick * of 128K even when running on a system that supports larger
603bc218d89SKirk McKusick * values. If the filesystem was built on a system that supports
604bc218d89SKirk McKusick * a larger maxphys (1M is typical) it will have configured
605bc218d89SKirk McKusick * fs_maxcontig for that larger system. So we bound the upper
606bc218d89SKirk McKusick * allowable limit for fs_maxconfig to be able to at least
607bc218d89SKirk McKusick * work with a 1M maxphys on the smallest block size filesystem:
608bc218d89SKirk McKusick * 1M / 4096 == 256. There is no harm in allowing the mounting of
609bc218d89SKirk McKusick * filesystems that make larger than maxphys I/O requests because
610bc218d89SKirk McKusick * those (mostly 32-bit machines) can (very slowly) handle I/O
611bc218d89SKirk McKusick * requests that exceed maxphys.
612076002f2SKirk McKusick */
613d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, <, 0, %jd);
614d22531d5SKirk McKusick WCHK(fs->fs_maxcontig, >, MAX(256, maxphys / fs->fs_bsize), %jd);
615f0be378aSKirk McKusick FCHK2(fs->fs_maxcontig, ==, 0, fs->fs_contigsumsize, !=, 0, %jd);
616f0be378aSKirk McKusick FCHK2(fs->fs_maxcontig, >, 1, fs->fs_contigsumsize, !=,
61750dc4c7dSKirk McKusick MIN(fs->fs_maxcontig, FS_MAXCONTIG), %jd);
618b21582eeSKirk McKusick return (error);
619076002f2SKirk McKusick }
620076002f2SKirk McKusick
621076002f2SKirk McKusick /*
622e6886616SKirk McKusick * Make an extensive search to find a superblock. If the superblock
623e6886616SKirk McKusick * in the standard place cannot be used, try looking for one of the
624e6886616SKirk McKusick * backup superblocks.
625e6886616SKirk McKusick *
626e6886616SKirk McKusick * Flags are made up of the following or'ed together options:
627e6886616SKirk McKusick *
628e6886616SKirk McKusick * UFS_NOMSG indicates that superblock inconsistency error messages
629e6886616SKirk McKusick * should not be printed.
630e6886616SKirk McKusick *
631e6886616SKirk McKusick * UFS_NOCSUM causes only the superblock itself to be returned, but does
632e6886616SKirk McKusick * not read in any auxillary data structures like the cylinder group
633e6886616SKirk McKusick * summary information.
634e6886616SKirk McKusick */
635e6886616SKirk McKusick int
ffs_sbsearch(void * devfd,struct fs ** fsp,int reqflags,struct malloc_type * filltype,int (* readfunc)(void * devfd,off_t loc,void ** bufp,int size))636e6886616SKirk McKusick ffs_sbsearch(void *devfd, struct fs **fsp, int reqflags,
637e6886616SKirk McKusick struct malloc_type *filltype,
638e6886616SKirk McKusick int (*readfunc)(void *devfd, off_t loc, void **bufp, int size))
639e6886616SKirk McKusick {
640e6886616SKirk McKusick struct fsrecovery *fsr;
641e6886616SKirk McKusick struct fs *protofs;
642e6886616SKirk McKusick void *fsrbuf;
643e6886616SKirk McKusick char *cp;
644e6886616SKirk McKusick long nocsum, flags, msg, cg;
645e6886616SKirk McKusick off_t sblk, secsize;
646e6886616SKirk McKusick int error;
647e6886616SKirk McKusick
648e6886616SKirk McKusick msg = (reqflags & UFS_NOMSG) == 0;
649e6886616SKirk McKusick nocsum = reqflags & UFS_NOCSUM;
650e6886616SKirk McKusick /*
651e6886616SKirk McKusick * Try normal superblock read and return it if it works.
652e6886616SKirk McKusick *
653e6886616SKirk McKusick * Suppress messages if it fails until we find out if
654e6886616SKirk McKusick * failure can be avoided.
655e6886616SKirk McKusick */
656e6886616SKirk McKusick flags = UFS_NOMSG | nocsum;
657b13110e9SAlfredo Dal'Ava Junior error = ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc);
658b13110e9SAlfredo Dal'Ava Junior /*
659b13110e9SAlfredo Dal'Ava Junior * If successful or endian error, no need to try further.
660b13110e9SAlfredo Dal'Ava Junior */
661b13110e9SAlfredo Dal'Ava Junior if (error == 0 || error == EILSEQ) {
662b13110e9SAlfredo Dal'Ava Junior if (msg && error == EILSEQ)
663b13110e9SAlfredo Dal'Ava Junior printf("UFS superblock failed due to endian mismatch "
664b13110e9SAlfredo Dal'Ava Junior "between machine and filesystem\n");
665b13110e9SAlfredo Dal'Ava Junior return (error);
666b13110e9SAlfredo Dal'Ava Junior }
667e6886616SKirk McKusick /*
668e6886616SKirk McKusick * First try: ignoring hash failures.
669e6886616SKirk McKusick */
670e6886616SKirk McKusick flags |= UFS_NOHASHFAIL;
671e6886616SKirk McKusick if (msg)
672e6886616SKirk McKusick flags &= ~UFS_NOMSG;
673e6886616SKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) == 0)
674e6886616SKirk McKusick return (0);
675e6886616SKirk McKusick /*
676e6886616SKirk McKusick * Next up is to check if fields of the superblock that are
677e6886616SKirk McKusick * needed to find backup superblocks are usable.
678e6886616SKirk McKusick */
679e6886616SKirk McKusick if (msg)
680e6886616SKirk McKusick printf("Attempted recovery for standard superblock: failed\n");
68142c82aadSKirk McKusick flags = UFS_FSRONLY | UFS_NOHASHFAIL | UFS_NOCSUM | UFS_NOMSG;
682e6886616SKirk McKusick if (ffs_sbget(devfd, &protofs, UFS_STDSB, flags, filltype,
683e6886616SKirk McKusick readfunc) == 0) {
684e6886616SKirk McKusick if (msg)
685f0be378aSKirk McKusick printf("Attempt extraction of recovery data from "
686f0be378aSKirk McKusick "standard superblock.\n");
687e6886616SKirk McKusick } else {
688e6886616SKirk McKusick /*
689e6886616SKirk McKusick * Final desperation is to see if alternate superblock
690e6886616SKirk McKusick * parameters have been saved in the boot area.
691e6886616SKirk McKusick */
692e6886616SKirk McKusick if (msg)
693e6886616SKirk McKusick printf("Attempted extraction of recovery data from "
694e6886616SKirk McKusick "standard superblock: failed\nAttempt to find "
695f0be378aSKirk McKusick "boot zone recovery data.\n");
696e6886616SKirk McKusick /*
697e6886616SKirk McKusick * Look to see if recovery information has been saved.
698e6886616SKirk McKusick * If so we can generate a prototype superblock based
699e6886616SKirk McKusick * on that information.
700e6886616SKirk McKusick *
701e6886616SKirk McKusick * We need fragments-per-group, number of cylinder groups,
702e6886616SKirk McKusick * location of the superblock within the cylinder group, and
703e6886616SKirk McKusick * the conversion from filesystem fragments to disk blocks.
704e6886616SKirk McKusick *
705e6886616SKirk McKusick * When building a UFS2 filesystem, newfs(8) stores these
706e6886616SKirk McKusick * details at the end of the boot block area at the start
707e6886616SKirk McKusick * of the filesystem partition. If they have been overwritten
708e6886616SKirk McKusick * by a boot block, we fail. But usually they are there
709e6886616SKirk McKusick * and we can use them.
710e6886616SKirk McKusick *
711e6886616SKirk McKusick * We could ask the underlying device for its sector size,
712e6886616SKirk McKusick * but some devices lie. So we just try a plausible range.
713e6886616SKirk McKusick */
714e6886616SKirk McKusick error = ENOENT;
715b13110e9SAlfredo Dal'Ava Junior fsrbuf = NULL;
716e6886616SKirk McKusick for (secsize = dbtob(1); secsize <= SBLOCKSIZE; secsize *= 2)
717e6886616SKirk McKusick if ((error = (*readfunc)(devfd, (SBLOCK_UFS2 - secsize),
718e6886616SKirk McKusick &fsrbuf, secsize)) == 0)
719e6886616SKirk McKusick break;
720e6886616SKirk McKusick if (error != 0)
721e6886616SKirk McKusick goto trynowarn;
722e6886616SKirk McKusick cp = fsrbuf; /* type change to keep compiler happy */
723e6886616SKirk McKusick fsr = (struct fsrecovery *)&cp[secsize - sizeof *fsr];
724e6886616SKirk McKusick if (fsr->fsr_magic != FS_UFS2_MAGIC ||
725e6886616SKirk McKusick (protofs = UFS_MALLOC(SBLOCKSIZE, filltype, M_NOWAIT))
726e6886616SKirk McKusick == NULL) {
727e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype);
728e6886616SKirk McKusick goto trynowarn;
729e6886616SKirk McKusick }
730e6886616SKirk McKusick memset(protofs, 0, sizeof(struct fs));
731e6886616SKirk McKusick protofs->fs_fpg = fsr->fsr_fpg;
732e6886616SKirk McKusick protofs->fs_fsbtodb = fsr->fsr_fsbtodb;
733e6886616SKirk McKusick protofs->fs_sblkno = fsr->fsr_sblkno;
734e6886616SKirk McKusick protofs->fs_magic = fsr->fsr_magic;
735e6886616SKirk McKusick protofs->fs_ncg = fsr->fsr_ncg;
736e6886616SKirk McKusick UFS_FREE(fsrbuf, filltype);
737e6886616SKirk McKusick }
738e6886616SKirk McKusick /*
739e6886616SKirk McKusick * Scan looking for alternative superblocks.
740e6886616SKirk McKusick */
741f0be378aSKirk McKusick flags = nocsum;
742f0be378aSKirk McKusick if (!msg)
743f0be378aSKirk McKusick flags |= UFS_NOMSG;
744e6886616SKirk McKusick for (cg = 0; cg < protofs->fs_ncg; cg++) {
745f0be378aSKirk McKusick sblk = fsbtodb(protofs, cgsblock(protofs, cg));
746f0be378aSKirk McKusick if (msg)
747f0be378aSKirk McKusick printf("Try cg %ld at sblock loc %jd\n", cg,
748f0be378aSKirk McKusick (intmax_t)sblk);
749f0be378aSKirk McKusick if (ffs_sbget(devfd, fsp, dbtob(sblk), flags, filltype,
750e6886616SKirk McKusick readfunc) == 0) {
751e6886616SKirk McKusick if (msg)
752f0be378aSKirk McKusick printf("Succeeded with alternate superblock "
753f0be378aSKirk McKusick "at %jd\n", (intmax_t)sblk);
754e6886616SKirk McKusick UFS_FREE(protofs, filltype);
755e6886616SKirk McKusick return (0);
756e6886616SKirk McKusick }
757e6886616SKirk McKusick }
758e6886616SKirk McKusick UFS_FREE(protofs, filltype);
759e6886616SKirk McKusick /*
760e6886616SKirk McKusick * Our alternate superblock strategies failed. Our last ditch effort
761e6886616SKirk McKusick * is to see if the standard superblock has only non-critical errors.
762e6886616SKirk McKusick */
763e6886616SKirk McKusick trynowarn:
764e6886616SKirk McKusick flags = UFS_NOWARNFAIL | UFS_NOMSG | nocsum;
765e6886616SKirk McKusick if (msg) {
766f0be378aSKirk McKusick printf("Finding an alternate superblock failed.\nCheck for "
767f0be378aSKirk McKusick "only non-critical errors in standard superblock\n");
768e6886616SKirk McKusick flags &= ~UFS_NOMSG;
769e6886616SKirk McKusick }
770f0be378aSKirk McKusick if (ffs_sbget(devfd, fsp, UFS_STDSB, flags, filltype, readfunc) != 0) {
771e6886616SKirk McKusick if (msg)
772f0be378aSKirk McKusick printf("Failed, superblock has critical errors\n");
773f0be378aSKirk McKusick return (ENOENT);
774f0be378aSKirk McKusick }
775f0be378aSKirk McKusick if (msg)
776f0be378aSKirk McKusick printf("Success, using standard superblock with "
777f0be378aSKirk McKusick "non-critical errors.\n");
778e6886616SKirk McKusick return (0);
779e6886616SKirk McKusick }
780e6886616SKirk McKusick
781e6886616SKirk McKusick /*
782dffce215SKirk McKusick * Write a superblock to the devfd device from the memory pointed to by fs.
783dffce215SKirk McKusick * Write out the superblock summary information if it is present.
784dffce215SKirk McKusick *
785dffce215SKirk McKusick * If the write is successful, zero is returned. Otherwise one of the
786dffce215SKirk McKusick * following error values is returned:
787dffce215SKirk McKusick * EIO: failed to write superblock.
788dffce215SKirk McKusick * EIO: failed to write superblock summary information.
789dffce215SKirk McKusick */
790dffce215SKirk McKusick int
ffs_sbput(void * devfd,struct fs * fs,off_t loc,int (* writefunc)(void * devfd,off_t loc,void * buf,int size))791dffce215SKirk McKusick ffs_sbput(void *devfd, struct fs *fs, off_t loc,
792dffce215SKirk McKusick int (*writefunc)(void *devfd, off_t loc, void *buf, int size))
793dffce215SKirk McKusick {
794dffce215SKirk McKusick int i, error, blks, size;
795dffce215SKirk McKusick uint8_t *space;
796dffce215SKirk McKusick
797dffce215SKirk McKusick /*
798dffce215SKirk McKusick * If there is summary information, write it first, so if there
799dffce215SKirk McKusick * is an error, the superblock will not be marked as clean.
800dffce215SKirk McKusick */
80134816cb9SKirk McKusick if (fs->fs_si != NULL && fs->fs_csp != NULL) {
802dffce215SKirk McKusick blks = howmany(fs->fs_cssize, fs->fs_fsize);
803dffce215SKirk McKusick space = (uint8_t *)fs->fs_csp;
804dffce215SKirk McKusick for (i = 0; i < blks; i += fs->fs_frag) {
805dffce215SKirk McKusick size = fs->fs_bsize;
806dffce215SKirk McKusick if (i + fs->fs_frag > blks)
807dffce215SKirk McKusick size = (blks - i) * fs->fs_fsize;
808dffce215SKirk McKusick if ((error = (*writefunc)(devfd,
809dffce215SKirk McKusick dbtob(fsbtodb(fs, fs->fs_csaddr + i)),
810dffce215SKirk McKusick space, size)) != 0)
811dffce215SKirk McKusick return (error);
812dffce215SKirk McKusick space += size;
813dffce215SKirk McKusick }
814dffce215SKirk McKusick }
815dffce215SKirk McKusick fs->fs_fmod = 0;
81693440bbeSKirk McKusick #ifndef _KERNEL
81793440bbeSKirk McKusick {
81893440bbeSKirk McKusick struct fs_summary_info *fs_si;
81993440bbeSKirk McKusick
82093440bbeSKirk McKusick fs->fs_time = time(NULL);
82193440bbeSKirk McKusick /* Clear the pointers for the duration of writing. */
82293440bbeSKirk McKusick fs_si = fs->fs_si;
82393440bbeSKirk McKusick fs->fs_si = NULL;
824ade67b50SKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs);
82593440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize);
82693440bbeSKirk McKusick fs->fs_si = fs_si;
82793440bbeSKirk McKusick }
82893440bbeSKirk McKusick #else /* _KERNEL */
82993440bbeSKirk McKusick fs->fs_time = time_second;
83093440bbeSKirk McKusick fs->fs_ckhash = ffs_calc_sbhash(fs);
83193440bbeSKirk McKusick error = (*writefunc)(devfd, loc, fs, fs->fs_sbsize);
83293440bbeSKirk McKusick #endif /* _KERNEL */
833dffce215SKirk McKusick return (error);
834dffce215SKirk McKusick }
835dffce215SKirk McKusick
836dffce215SKirk McKusick /*
837ec888383SKirk McKusick * Calculate the check-hash for a superblock.
838ec888383SKirk McKusick */
839ade67b50SKirk McKusick uint32_t
ffs_calc_sbhash(struct fs * fs)840ade67b50SKirk McKusick ffs_calc_sbhash(struct fs *fs)
841ec888383SKirk McKusick {
842ec888383SKirk McKusick uint32_t ckhash, save_ckhash;
843ec888383SKirk McKusick
844ec888383SKirk McKusick /*
845ec888383SKirk McKusick * A filesystem that was using a superblock ckhash may be moved
846ec888383SKirk McKusick * to an older kernel that does not support ckhashes. The
847ec888383SKirk McKusick * older kernel will clear the FS_METACKHASH flag indicating
848ec888383SKirk McKusick * that it does not update hashes. When the disk is moved back
849ec888383SKirk McKusick * to a kernel capable of ckhashes it disables them on mount:
850ec888383SKirk McKusick *
851ec888383SKirk McKusick * if ((fs->fs_flags & FS_METACKHASH) == 0)
852ec888383SKirk McKusick * fs->fs_metackhash = 0;
853ec888383SKirk McKusick *
854ec888383SKirk McKusick * This leaves (fs->fs_metackhash & CK_SUPERBLOCK) == 0) with an
855ec888383SKirk McKusick * old stale value in the fs->fs_ckhash field. Thus the need to
856ec888383SKirk McKusick * just accept what is there.
857ec888383SKirk McKusick */
858ec888383SKirk McKusick if ((fs->fs_metackhash & CK_SUPERBLOCK) == 0)
859ec888383SKirk McKusick return (fs->fs_ckhash);
860ec888383SKirk McKusick
861ec888383SKirk McKusick save_ckhash = fs->fs_ckhash;
862ec888383SKirk McKusick fs->fs_ckhash = 0;
863ec888383SKirk McKusick /*
864ec888383SKirk McKusick * If newly read from disk, the caller is responsible for
865ec888383SKirk McKusick * verifying that fs->fs_sbsize <= SBLOCKSIZE.
866ec888383SKirk McKusick */
867ec888383SKirk McKusick ckhash = calculate_crc32c(~0L, (void *)fs, fs->fs_sbsize);
868ec888383SKirk McKusick fs->fs_ckhash = save_ckhash;
869ec888383SKirk McKusick return (ckhash);
870ec888383SKirk McKusick }
871ec888383SKirk McKusick
872ec888383SKirk McKusick /*
873df8bae1dSRodney W. Grimes * Update the frsum fields to reflect addition or deletion
874df8bae1dSRodney W. Grimes * of some frags.
875df8bae1dSRodney W. Grimes */
876df8bae1dSRodney W. Grimes void
ffs_fragacct(struct fs * fs,int fragmap,int32_t fraglist[],int cnt)87715c377c3SEd Maste ffs_fragacct(struct fs *fs, int fragmap, int32_t fraglist[], int cnt)
878df8bae1dSRodney W. Grimes {
879df8bae1dSRodney W. Grimes int inblk;
88005f4ff5dSPoul-Henning Kamp int field, subfield;
88105f4ff5dSPoul-Henning Kamp int siz, pos;
882df8bae1dSRodney W. Grimes
883df8bae1dSRodney W. Grimes inblk = (int)(fragtbl[fs->fs_frag][fragmap]) << 1;
884df8bae1dSRodney W. Grimes fragmap <<= 1;
885df8bae1dSRodney W. Grimes for (siz = 1; siz < fs->fs_frag; siz++) {
886df8bae1dSRodney W. Grimes if ((inblk & (1 << (siz + (fs->fs_frag % NBBY)))) == 0)
887df8bae1dSRodney W. Grimes continue;
888df8bae1dSRodney W. Grimes field = around[siz];
889df8bae1dSRodney W. Grimes subfield = inside[siz];
890df8bae1dSRodney W. Grimes for (pos = siz; pos <= fs->fs_frag; pos++) {
891df8bae1dSRodney W. Grimes if ((fragmap & field) == subfield) {
892df8bae1dSRodney W. Grimes fraglist[siz] += cnt;
893df8bae1dSRodney W. Grimes pos += siz;
894df8bae1dSRodney W. Grimes field <<= siz;
895df8bae1dSRodney W. Grimes subfield <<= siz;
896df8bae1dSRodney W. Grimes }
897df8bae1dSRodney W. Grimes field <<= 1;
898df8bae1dSRodney W. Grimes subfield <<= 1;
899df8bae1dSRodney W. Grimes }
900df8bae1dSRodney W. Grimes }
901df8bae1dSRodney W. Grimes }
902df8bae1dSRodney W. Grimes
903df8bae1dSRodney W. Grimes /*
904df8bae1dSRodney W. Grimes * block operations
905df8bae1dSRodney W. Grimes *
906df8bae1dSRodney W. Grimes * check if a block is available
907df8bae1dSRodney W. Grimes */
908df8bae1dSRodney W. Grimes int
ffs_isblock(struct fs * fs,unsigned char * cp,ufs1_daddr_t h)90915c377c3SEd Maste ffs_isblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h)
910df8bae1dSRodney W. Grimes {
911df8bae1dSRodney W. Grimes unsigned char mask;
912df8bae1dSRodney W. Grimes
913df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) {
914df8bae1dSRodney W. Grimes case 8:
915df8bae1dSRodney W. Grimes return (cp[h] == 0xff);
916df8bae1dSRodney W. Grimes case 4:
917df8bae1dSRodney W. Grimes mask = 0x0f << ((h & 0x1) << 2);
918df8bae1dSRodney W. Grimes return ((cp[h >> 1] & mask) == mask);
919df8bae1dSRodney W. Grimes case 2:
920df8bae1dSRodney W. Grimes mask = 0x03 << ((h & 0x3) << 1);
921df8bae1dSRodney W. Grimes return ((cp[h >> 2] & mask) == mask);
922df8bae1dSRodney W. Grimes case 1:
923df8bae1dSRodney W. Grimes mask = 0x01 << (h & 0x7);
924df8bae1dSRodney W. Grimes return ((cp[h >> 3] & mask) == mask);
925df8bae1dSRodney W. Grimes default:
926113db2ddSJeff Roberson #ifdef _KERNEL
927df8bae1dSRodney W. Grimes panic("ffs_isblock");
928113db2ddSJeff Roberson #endif
929113db2ddSJeff Roberson break;
930113db2ddSJeff Roberson }
931113db2ddSJeff Roberson return (0);
932113db2ddSJeff Roberson }
933113db2ddSJeff Roberson
934113db2ddSJeff Roberson /*
935113db2ddSJeff Roberson * check if a block is free
936113db2ddSJeff Roberson */
937113db2ddSJeff Roberson int
ffs_isfreeblock(struct fs * fs,uint8_t * cp,ufs1_daddr_t h)938831b1ff7SKirk McKusick ffs_isfreeblock(struct fs *fs, uint8_t *cp, ufs1_daddr_t h)
939113db2ddSJeff Roberson {
940113db2ddSJeff Roberson
941113db2ddSJeff Roberson switch ((int)fs->fs_frag) {
942113db2ddSJeff Roberson case 8:
943113db2ddSJeff Roberson return (cp[h] == 0);
944113db2ddSJeff Roberson case 4:
945113db2ddSJeff Roberson return ((cp[h >> 1] & (0x0f << ((h & 0x1) << 2))) == 0);
946113db2ddSJeff Roberson case 2:
947113db2ddSJeff Roberson return ((cp[h >> 2] & (0x03 << ((h & 0x3) << 1))) == 0);
948113db2ddSJeff Roberson case 1:
949113db2ddSJeff Roberson return ((cp[h >> 3] & (0x01 << (h & 0x7))) == 0);
950113db2ddSJeff Roberson default:
951113db2ddSJeff Roberson #ifdef _KERNEL
952113db2ddSJeff Roberson panic("ffs_isfreeblock");
953113db2ddSJeff Roberson #endif
954113db2ddSJeff Roberson break;
955df8bae1dSRodney W. Grimes }
956589c7af9SKirk McKusick return (0);
957df8bae1dSRodney W. Grimes }
958df8bae1dSRodney W. Grimes
959df8bae1dSRodney W. Grimes /*
960df8bae1dSRodney W. Grimes * take a block out of the map
961df8bae1dSRodney W. Grimes */
962df8bae1dSRodney W. Grimes void
ffs_clrblock(struct fs * fs,uint8_t * cp,ufs1_daddr_t h)963831b1ff7SKirk McKusick ffs_clrblock(struct fs *fs, uint8_t *cp, ufs1_daddr_t h)
964df8bae1dSRodney W. Grimes {
965df8bae1dSRodney W. Grimes
966df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) {
967df8bae1dSRodney W. Grimes case 8:
968df8bae1dSRodney W. Grimes cp[h] = 0;
969df8bae1dSRodney W. Grimes return;
970df8bae1dSRodney W. Grimes case 4:
971df8bae1dSRodney W. Grimes cp[h >> 1] &= ~(0x0f << ((h & 0x1) << 2));
972df8bae1dSRodney W. Grimes return;
973df8bae1dSRodney W. Grimes case 2:
974df8bae1dSRodney W. Grimes cp[h >> 2] &= ~(0x03 << ((h & 0x3) << 1));
975df8bae1dSRodney W. Grimes return;
976df8bae1dSRodney W. Grimes case 1:
977df8bae1dSRodney W. Grimes cp[h >> 3] &= ~(0x01 << (h & 0x7));
978df8bae1dSRodney W. Grimes return;
979df8bae1dSRodney W. Grimes default:
980113db2ddSJeff Roberson #ifdef _KERNEL
981df8bae1dSRodney W. Grimes panic("ffs_clrblock");
982113db2ddSJeff Roberson #endif
983113db2ddSJeff Roberson break;
984df8bae1dSRodney W. Grimes }
985df8bae1dSRodney W. Grimes }
986df8bae1dSRodney W. Grimes
987df8bae1dSRodney W. Grimes /*
988df8bae1dSRodney W. Grimes * put a block into the map
989df8bae1dSRodney W. Grimes */
990df8bae1dSRodney W. Grimes void
ffs_setblock(struct fs * fs,unsigned char * cp,ufs1_daddr_t h)99115c377c3SEd Maste ffs_setblock(struct fs *fs, unsigned char *cp, ufs1_daddr_t h)
992df8bae1dSRodney W. Grimes {
993df8bae1dSRodney W. Grimes
994df8bae1dSRodney W. Grimes switch ((int)fs->fs_frag) {
995df8bae1dSRodney W. Grimes case 8:
996df8bae1dSRodney W. Grimes cp[h] = 0xff;
997df8bae1dSRodney W. Grimes return;
998df8bae1dSRodney W. Grimes case 4:
999df8bae1dSRodney W. Grimes cp[h >> 1] |= (0x0f << ((h & 0x1) << 2));
1000df8bae1dSRodney W. Grimes return;
1001df8bae1dSRodney W. Grimes case 2:
1002df8bae1dSRodney W. Grimes cp[h >> 2] |= (0x03 << ((h & 0x3) << 1));
1003df8bae1dSRodney W. Grimes return;
1004df8bae1dSRodney W. Grimes case 1:
1005df8bae1dSRodney W. Grimes cp[h >> 3] |= (0x01 << (h & 0x7));
1006df8bae1dSRodney W. Grimes return;
1007df8bae1dSRodney W. Grimes default:
1008113db2ddSJeff Roberson #ifdef _KERNEL
1009df8bae1dSRodney W. Grimes panic("ffs_setblock");
1010113db2ddSJeff Roberson #endif
1011113db2ddSJeff Roberson break;
1012df8bae1dSRodney W. Grimes }
1013df8bae1dSRodney W. Grimes }
1014113db2ddSJeff Roberson
1015113db2ddSJeff Roberson /*
1016113db2ddSJeff Roberson * Update the cluster map because of an allocation or free.
1017113db2ddSJeff Roberson *
1018113db2ddSJeff Roberson * Cnt == 1 means free; cnt == -1 means allocating.
1019113db2ddSJeff Roberson */
1020113db2ddSJeff Roberson void
ffs_clusteracct(struct fs * fs,struct cg * cgp,ufs1_daddr_t blkno,int cnt)102115c377c3SEd Maste ffs_clusteracct(struct fs *fs, struct cg *cgp, ufs1_daddr_t blkno, int cnt)
1022113db2ddSJeff Roberson {
1023113db2ddSJeff Roberson int32_t *sump;
1024113db2ddSJeff Roberson int32_t *lp;
1025831b1ff7SKirk McKusick uint8_t *freemapp, *mapp;
1026e1c27cf7SKirk McKusick int i, start, end, forw, back, map;
1027831b1ff7SKirk McKusick uint64_t bit;
1028113db2ddSJeff Roberson
1029113db2ddSJeff Roberson if (fs->fs_contigsumsize <= 0)
1030113db2ddSJeff Roberson return;
1031113db2ddSJeff Roberson freemapp = cg_clustersfree(cgp);
1032113db2ddSJeff Roberson sump = cg_clustersum(cgp);
1033113db2ddSJeff Roberson /*
1034113db2ddSJeff Roberson * Allocate or clear the actual block.
1035113db2ddSJeff Roberson */
1036113db2ddSJeff Roberson if (cnt > 0)
1037113db2ddSJeff Roberson setbit(freemapp, blkno);
1038113db2ddSJeff Roberson else
1039113db2ddSJeff Roberson clrbit(freemapp, blkno);
1040113db2ddSJeff Roberson /*
1041113db2ddSJeff Roberson * Find the size of the cluster going forward.
1042113db2ddSJeff Roberson */
1043113db2ddSJeff Roberson start = blkno + 1;
1044113db2ddSJeff Roberson end = start + fs->fs_contigsumsize;
1045113db2ddSJeff Roberson if (end >= cgp->cg_nclusterblks)
1046113db2ddSJeff Roberson end = cgp->cg_nclusterblks;
1047113db2ddSJeff Roberson mapp = &freemapp[start / NBBY];
1048113db2ddSJeff Roberson map = *mapp++;
1049e1c27cf7SKirk McKusick bit = 1U << (start % NBBY);
1050113db2ddSJeff Roberson for (i = start; i < end; i++) {
1051113db2ddSJeff Roberson if ((map & bit) == 0)
1052113db2ddSJeff Roberson break;
1053113db2ddSJeff Roberson if ((i & (NBBY - 1)) != (NBBY - 1)) {
1054113db2ddSJeff Roberson bit <<= 1;
1055113db2ddSJeff Roberson } else {
1056113db2ddSJeff Roberson map = *mapp++;
1057113db2ddSJeff Roberson bit = 1;
1058113db2ddSJeff Roberson }
1059113db2ddSJeff Roberson }
1060113db2ddSJeff Roberson forw = i - start;
1061113db2ddSJeff Roberson /*
1062113db2ddSJeff Roberson * Find the size of the cluster going backward.
1063113db2ddSJeff Roberson */
1064113db2ddSJeff Roberson start = blkno - 1;
1065113db2ddSJeff Roberson end = start - fs->fs_contigsumsize;
1066113db2ddSJeff Roberson if (end < 0)
1067113db2ddSJeff Roberson end = -1;
1068113db2ddSJeff Roberson mapp = &freemapp[start / NBBY];
1069113db2ddSJeff Roberson map = *mapp--;
1070e1c27cf7SKirk McKusick bit = 1U << (start % NBBY);
1071113db2ddSJeff Roberson for (i = start; i > end; i--) {
1072113db2ddSJeff Roberson if ((map & bit) == 0)
1073113db2ddSJeff Roberson break;
1074113db2ddSJeff Roberson if ((i & (NBBY - 1)) != 0) {
1075113db2ddSJeff Roberson bit >>= 1;
1076113db2ddSJeff Roberson } else {
1077113db2ddSJeff Roberson map = *mapp--;
1078e1c27cf7SKirk McKusick bit = 1U << (NBBY - 1);
1079113db2ddSJeff Roberson }
1080113db2ddSJeff Roberson }
1081113db2ddSJeff Roberson back = start - i;
1082113db2ddSJeff Roberson /*
1083113db2ddSJeff Roberson * Account for old cluster and the possibly new forward and
1084113db2ddSJeff Roberson * back clusters.
1085113db2ddSJeff Roberson */
1086113db2ddSJeff Roberson i = back + forw + 1;
1087113db2ddSJeff Roberson if (i > fs->fs_contigsumsize)
1088113db2ddSJeff Roberson i = fs->fs_contigsumsize;
1089113db2ddSJeff Roberson sump[i] += cnt;
1090113db2ddSJeff Roberson if (back > 0)
1091113db2ddSJeff Roberson sump[back] -= cnt;
1092113db2ddSJeff Roberson if (forw > 0)
1093113db2ddSJeff Roberson sump[forw] -= cnt;
1094113db2ddSJeff Roberson /*
1095113db2ddSJeff Roberson * Update cluster summary information.
1096113db2ddSJeff Roberson */
1097113db2ddSJeff Roberson lp = &sump[fs->fs_contigsumsize];
1098113db2ddSJeff Roberson for (i = fs->fs_contigsumsize; i > 0; i--)
1099113db2ddSJeff Roberson if (*lp-- > 0)
1100113db2ddSJeff Roberson break;
1101113db2ddSJeff Roberson fs->fs_maxcluster[cgp->cg_cgx] = i;
1102113db2ddSJeff Roberson }
1103