2 * Copyright (c) 2002 Juli Mallett. All rights reserved.
4 * This software was written by Juli Mallett <jmallett@FreeBSD.org> for the
5 * FreeBSD project. Redistribution and use in source and binary forms, with
6 * or without modification, are permitted provided that the following
9 * 1. Redistribution of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 * 2. Redistribution in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
24 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 #include <sys/param.h>
32 #include <sys/mount.h>
33 #include <sys/disklabel.h>
36 #include <ufs/ufs/ufsmount.h>
37 #include <ufs/ufs/dinode.h>
38 #include <ufs/ffs/fs.h>
50 bread(struct uufsd *disk, ufs2_daddr_t blockno, void *data, size_t size)
59 * XXX: various disk controllers require alignment of our buffer
60 * XXX: which is stricter than struct alignment.
61 * XXX: Bounce the buffer if not 64 byte aligned.
62 * XXX: this can be removed if/when the kernel is fixed
64 if (((intptr_t)data) & 0x3f) {
67 ERROR(disk, "allocate bounce buffer");
69 cnt = pread(disk->d_fd, p2, size, (off_t)(blockno * disk->d_bsize));
71 ERROR(disk, "read error from block device");
75 ERROR(disk, "end of file from block device");
78 if ((size_t)cnt != size) {
79 ERROR(disk, "short read or read error from block device");
83 memcpy(data, p2, size);
87 fail: memset(data, 0, size);
95 bwrite(struct uufsd *disk, ufs2_daddr_t blockno, const void *data, size_t size)
103 rv = ufs_disk_write(disk);
105 ERROR(disk, "failed to open disk for writing");
110 * XXX: various disk controllers require alignment of our buffer
111 * XXX: which is stricter than struct alignment.
112 * XXX: Bounce the buffer if not 64 byte aligned.
113 * XXX: this can be removed if/when the kernel is fixed
115 if (((intptr_t)data) & 0x3f) {
118 ERROR(disk, "allocate bounce buffer");
119 memcpy(p2, data, size);
122 cnt = pwrite(disk->d_fd, data, size, (off_t)(blockno * disk->d_bsize));
126 ERROR(disk, "write error to block device");
129 if ((size_t)cnt != size) {
130 ERROR(disk, "short write to block device");