Preparation for UFS2 commit:
Factor the ufs reading code out of the i386/boot2 loader so it can be reused by for instance sparc64. Sponsored by: DARPA and NAI Labs.
This commit is contained in:
Poul-Henning Kamp
parent
ccdd94bdd9
commit
833468e219
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=97860
183
sys/boot/common/ufsread.c
Normal file
183
sys/boot/common/ufsread.c
Normal file
@ -0,0 +1,183 @@
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/*
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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/*
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* $FreeBSD$
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*/
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/dinode.h>
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/*
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* We use 4k `virtual' blocks for filesystem data, whatever the actual
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* filesystem block size. FFS blocks are always a multiple of 4k.
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*/
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#define VBLKSIZE 4096
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#define VBLKMASK (VBLKSIZE - 1)
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#define DBPERVBLK (VBLKSIZE / DEV_BSIZE)
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#define IPERVBLK (VBLKSIZE / sizeof(struct dinode))
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#define INDIRPERVBLK (VBLKSIZE / sizeof(ufs_daddr_t))
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#define INO_TO_VBA(fs, x) (fsbtodb(fs, ino_to_fsba(fs, x)) + \
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(ino_to_fsbo(fs, x) / IPERVBLK) * DBPERVBLK)
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#define INO_TO_VBO(fs, x) (ino_to_fsbo(fs, x) % IPERVBLK)
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#define FS_TO_VBA(fs, fsb, off) (fsbtodb(fs, fsb) + \
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((off) / VBLKSIZE) * DBPERVBLK)
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#define FS_TO_VBO(fs, fsb, off) ((off) & VBLKMASK)
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/* Buffers that must not span a 64k boundary. */
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static struct dmadat {
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char blkbuf[VBLKSIZE]; /* filesystem blocks */
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ufs_daddr_t indbuf[VBLKSIZE / sizeof(ufs_daddr_t)]; /* indir blocks */
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char sbbuf[SBSIZE]; /* superblock */
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char secbuf[DEV_BSIZE]; /* for MBR/disklabel */
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} *dmadat;
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static ino_t lookup(const char *);
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static ssize_t fsread(ino_t, void *, size_t);
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static int ls, dsk_meta;
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static uint32_t fs_off;
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static inline int
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fsfind(const char *name, ino_t * ino)
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{
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char buf[DEV_BSIZE];
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struct dirent *d;
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char *s;
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ssize_t n;
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fs_off = 0;
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while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0)
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for (s = buf; s < buf + DEV_BSIZE;) {
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d = (void *)s;
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if (ls)
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printf("%s ", d->d_name);
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else if (!strcmp(name, d->d_name)) {
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*ino = d->d_fileno;
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return d->d_type;
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}
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s += d->d_reclen;
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}
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if (n != -1 && ls)
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putchar('\n');
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return 0;
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}
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static ino_t
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lookup(const char *path)
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{
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char name[MAXNAMLEN + 1];
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const char *s;
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ino_t ino;
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ssize_t n;
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int dt;
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ino = ROOTINO;
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dt = DT_DIR;
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for (;;) {
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if (*path == '/')
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path++;
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if (!*path)
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break;
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for (s = path; *s && *s != '/'; s++);
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if ((n = s - path) > MAXNAMLEN)
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return 0;
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ls = *path == '?' && n == 1 && !*s;
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memcpy(name, path, n);
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name[n] = 0;
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if ((dt = fsfind(name, &ino)) <= 0)
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break;
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path = s;
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}
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return dt == DT_REG ? ino : 0;
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}
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static ssize_t
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fsread(ino_t inode, void *buf, size_t nbyte)
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{
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static struct dinode din;
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static ino_t inomap;
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static daddr_t blkmap, indmap;
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char *blkbuf;
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ufs_daddr_t *indbuf;
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struct fs *fs;
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char *s;
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ufs_daddr_t lbn, addr;
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daddr_t vbaddr;
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size_t n, nb, off, vboff;
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blkbuf = dmadat->blkbuf;
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indbuf = dmadat->indbuf;
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fs = (struct fs *)dmadat->sbbuf;
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if (!dsk_meta) {
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inomap = 0;
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if (dskread(fs, SBOFF / DEV_BSIZE, SBSIZE / DEV_BSIZE))
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return -1;
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if (fs->fs_magic != FS_MAGIC) {
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printf("Not ufs\n");
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return -1;
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}
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dsk_meta++;
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}
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if (!inode)
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return 0;
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if (inomap != inode) {
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if (dskread(blkbuf, INO_TO_VBA(fs, inode), DBPERVBLK))
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return -1;
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din = ((struct dinode *)blkbuf)[INO_TO_VBO(fs, inode)];
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inomap = inode;
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fs_off = 0;
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blkmap = indmap = 0;
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}
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s = buf;
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if (nbyte > (n = din.di_size - fs_off))
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nbyte = n;
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nb = nbyte;
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while (nb) {
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lbn = lblkno(fs, fs_off);
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off = blkoff(fs, fs_off);
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if (lbn < NDADDR)
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addr = din.di_db[lbn];
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else {
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vbaddr = FS_TO_VBA(fs, din.di_ib[0], sizeof(indbuf[0]) *
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((lbn - NDADDR) % NINDIR(fs)));
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if (indmap != vbaddr) {
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if (dskread(indbuf, vbaddr, DBPERVBLK))
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return -1;
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indmap = vbaddr;
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}
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addr = indbuf[(lbn - NDADDR) % INDIRPERVBLK];
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}
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vbaddr = FS_TO_VBA(fs, addr, off);
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vboff = FS_TO_VBO(fs, addr, off);
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n = dblksize(fs, &din, lbn) - (off & ~VBLKMASK);
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if (n > VBLKSIZE)
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n = VBLKSIZE;
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if (blkmap != vbaddr) {
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if (dskread(blkbuf, vbaddr, n >> DEV_BSHIFT))
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return -1;
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blkmap = vbaddr;
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}
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n -= vboff;
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if (n > nb)
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n = nb;
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memcpy(s, blkbuf + vboff, n);
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s += n;
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fs_off += n;
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nb -= n;
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}
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return nbyte;
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}
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@ -30,6 +30,7 @@ ORG2= 0x1000
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CFLAGS= -elf -ffreestanding -Os -fno-builtin \
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-fno-guess-branch-probability \
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-mrtd \
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-I${.CURDIR}/../../common \
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-I${.CURDIR}/../btx/lib -I. \
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-Wall -Waggregate-return -Wbad-function-cast -Wcast-align \
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-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
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@ -25,9 +25,6 @@
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#include <machine/bootinfo.h>
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#include <machine/elf.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/dinode.h>
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#include <stdarg.h>
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#include <a.out.h>
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@ -71,22 +68,6 @@
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#define V86_CY(x) ((x) & 1)
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#define V86_ZR(x) ((x) & 0x40)
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/*
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* We use 4k `virtual' blocks for filesystem data, whatever the actual
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* filesystem block size. FFS blocks are always a multiple of 4k.
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*/
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#define VBLKSIZE 4096
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#define VBLKMASK (VBLKSIZE - 1)
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#define DBPERVBLK (VBLKSIZE / DEV_BSIZE)
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#define IPERVBLK (VBLKSIZE / sizeof(struct dinode))
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#define INDIRPERVBLK (VBLKSIZE / sizeof(ufs_daddr_t))
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#define INO_TO_VBA(fs, x) (fsbtodb(fs, ino_to_fsba(fs, x)) + \
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(ino_to_fsbo(fs, x) / IPERVBLK) * DBPERVBLK)
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#define INO_TO_VBO(fs, x) (ino_to_fsbo(fs, x) % IPERVBLK)
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#define FS_TO_VBA(fs, fsb, off) (fsbtodb(fs, fsb) + \
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((off) / VBLKSIZE) * DBPERVBLK)
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#define FS_TO_VBO(fs, fsb, off) ((off) & VBLKMASK)
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#define DRV_HARD 0x80
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#define DRV_MASK 0x7f
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@ -96,14 +77,6 @@
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#define TYPE_FD 3
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#define TYPE_DA 4
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/* Buffers that must not span a 64k boundary. */
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static struct dmadat {
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char blkbuf[VBLKSIZE]; /* filesystem blocks */
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ufs_daddr_t indbuf[VBLKSIZE / sizeof(ufs_daddr_t)]; /* indir blocks */
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char sbbuf[SBSIZE]; /* superblock */
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char secbuf[DEV_BSIZE]; /* for MBR/disklabel */
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} *dmadat;
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extern uint32_t _end;
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static const char optstr[NOPT] = "DhaCcdgmnPprsv";
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@ -135,14 +108,11 @@ static struct dsk {
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unsigned part;
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unsigned start;
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int init;
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int meta;
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} dsk;
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static char cmd[512];
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static char kname[1024];
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static uint32_t opts;
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static struct bootinfo bootinfo;
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static int ls;
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static uint32_t fs_off;
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static uint8_t ioctrl = IO_KEYBOARD;
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void exit(int);
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@ -179,30 +149,7 @@ strcmp(const char *s1, const char *s2)
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return (u_char)*s1 - (u_char)*s2;
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}
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static inline int
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fsfind(const char *name, ino_t * ino)
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{
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char buf[DEV_BSIZE];
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struct dirent *d;
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char *s;
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ssize_t n;
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fs_off = 0;
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while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0)
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for (s = buf; s < buf + DEV_BSIZE;) {
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d = (void *)s;
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if (ls)
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printf("%s ", d->d_name);
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else if (!strcmp(name, d->d_name)) {
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*ino = d->d_fileno;
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return d->d_type;
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}
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s += d->d_reclen;
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}
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if (n != -1 && ls)
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putchar('\n');
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return 0;
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}
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#include "ufsread.c"
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static inline int
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getchar(void)
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@ -505,7 +452,7 @@ parse(char *arg)
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dsk.drive = (dsk.type == TYPE_WD ||
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dsk.type == TYPE_AD ||
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dsk.type == TYPE_DA ? DRV_HARD : 0) + drv;
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dsk.meta = 0;
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dsk_meta = 0;
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fsread(0, NULL, 0);
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}
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if ((i = p - arg - !*(p - 1))) {
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@ -519,34 +466,6 @@ parse(char *arg)
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return 0;
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}
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static ino_t
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lookup(const char *path)
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{
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char name[MAXNAMLEN + 1];
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const char *s;
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ino_t ino;
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ssize_t n;
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int dt;
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ino = ROOTINO;
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dt = DT_DIR;
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for (;;) {
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if (*path == '/')
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path++;
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if (!*path)
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break;
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for (s = path; *s && *s != '/'; s++);
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if ((n = s - path) > MAXNAMLEN)
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return 0;
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ls = *path == '?' && n == 1 && !*s;
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memcpy(name, path, n);
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name[n] = 0;
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if ((dt = fsfind(name, &ino)) <= 0)
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break;
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path = s;
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}
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return dt == DT_REG ? ino : 0;
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}
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static int
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xfsread(ino_t inode, void *buf, size_t nbyte)
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{
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@ -557,83 +476,6 @@ xfsread(ino_t inode, void *buf, size_t nbyte)
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return 0;
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}
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static ssize_t
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fsread(ino_t inode, void *buf, size_t nbyte)
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{
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static struct dinode din;
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static ino_t inomap;
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static daddr_t blkmap, indmap;
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char *blkbuf;
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ufs_daddr_t *indbuf;
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struct fs *fs;
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char *s;
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ufs_daddr_t lbn, addr;
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daddr_t vbaddr;
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size_t n, nb, off, vboff;
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blkbuf = dmadat->blkbuf;
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indbuf = dmadat->indbuf;
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fs = (struct fs *)dmadat->sbbuf;
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if (!dsk.meta) {
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inomap = 0;
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if (dskread(fs, SBOFF / DEV_BSIZE, SBSIZE / DEV_BSIZE))
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return -1;
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if (fs->fs_magic != FS_MAGIC) {
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printf("Not ufs\n");
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return -1;
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}
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dsk.meta++;
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}
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if (!inode)
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return 0;
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if (inomap != inode) {
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if (dskread(blkbuf, INO_TO_VBA(fs, inode), DBPERVBLK))
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return -1;
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din = ((struct dinode *)blkbuf)[INO_TO_VBO(fs, inode)];
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inomap = inode;
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fs_off = 0;
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blkmap = indmap = 0;
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}
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s = buf;
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if (nbyte > (n = din.di_size - fs_off))
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nbyte = n;
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nb = nbyte;
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while (nb) {
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lbn = lblkno(fs, fs_off);
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off = blkoff(fs, fs_off);
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if (lbn < NDADDR)
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addr = din.di_db[lbn];
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else {
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vbaddr = FS_TO_VBA(fs, din.di_ib[0], sizeof(indbuf[0]) *
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((lbn - NDADDR) % NINDIR(fs)));
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if (indmap != vbaddr) {
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if (dskread(indbuf, vbaddr, DBPERVBLK))
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return -1;
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indmap = vbaddr;
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}
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addr = indbuf[(lbn - NDADDR) % INDIRPERVBLK];
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}
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vbaddr = FS_TO_VBA(fs, addr, off);
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vboff = FS_TO_VBO(fs, addr, off);
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n = dblksize(fs, &din, lbn) - (off & ~VBLKMASK);
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if (n > VBLKSIZE)
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n = VBLKSIZE;
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if (blkmap != vbaddr) {
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if (dskread(blkbuf, vbaddr, n >> DEV_BSHIFT))
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return -1;
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blkmap = vbaddr;
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}
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n -= vboff;
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if (n > nb)
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n = nb;
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memcpy(s, blkbuf + vboff, n);
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s += n;
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fs_off += n;
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nb -= n;
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}
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return nbyte;
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}
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static int
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dskread(void *buf, unsigned lba, unsigned nblk)
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{
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@ -642,7 +484,7 @@ dskread(void *buf, unsigned lba, unsigned nblk)
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char *sec;
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unsigned sl, i;
|
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|
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if (!dsk.meta) {
|
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if (!dsk_meta) {
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sec = dmadat->secbuf;
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dsk.start = 0;
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if (drvread(sec, DOSBBSECTOR, 1))
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|
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@ -30,6 +30,7 @@ ORG2= 0x1000
|
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CFLAGS= -elf -ffreestanding -Os -fno-builtin \
|
||||
-fno-guess-branch-probability \
|
||||
-mrtd \
|
||||
-I${.CURDIR}/../../common \
|
||||
-I${.CURDIR}/../btx/lib -I. \
|
||||
-Wall -Waggregate-return -Wbad-function-cast -Wcast-align \
|
||||
-Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
|
||||
|
||||
@ -25,9 +25,6 @@
|
||||
#include <machine/bootinfo.h>
|
||||
#include <machine/elf.h>
|
||||
|
||||
#include <ufs/ffs/fs.h>
|
||||
#include <ufs/ufs/dinode.h>
|
||||
|
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#include <stdarg.h>
|
||||
|
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#include <a.out.h>
|
||||
@ -71,22 +68,6 @@
|
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#define V86_CY(x) ((x) & 1)
|
||||
#define V86_ZR(x) ((x) & 0x40)
|
||||
|
||||
/*
|
||||
* We use 4k `virtual' blocks for filesystem data, whatever the actual
|
||||
* filesystem block size. FFS blocks are always a multiple of 4k.
|
||||
*/
|
||||
#define VBLKSIZE 4096
|
||||
#define VBLKMASK (VBLKSIZE - 1)
|
||||
#define DBPERVBLK (VBLKSIZE / DEV_BSIZE)
|
||||
#define IPERVBLK (VBLKSIZE / sizeof(struct dinode))
|
||||
#define INDIRPERVBLK (VBLKSIZE / sizeof(ufs_daddr_t))
|
||||
#define INO_TO_VBA(fs, x) (fsbtodb(fs, ino_to_fsba(fs, x)) + \
|
||||
(ino_to_fsbo(fs, x) / IPERVBLK) * DBPERVBLK)
|
||||
#define INO_TO_VBO(fs, x) (ino_to_fsbo(fs, x) % IPERVBLK)
|
||||
#define FS_TO_VBA(fs, fsb, off) (fsbtodb(fs, fsb) + \
|
||||
((off) / VBLKSIZE) * DBPERVBLK)
|
||||
#define FS_TO_VBO(fs, fsb, off) ((off) & VBLKMASK)
|
||||
|
||||
#define DRV_HARD 0x80
|
||||
#define DRV_MASK 0x7f
|
||||
|
||||
@ -96,14 +77,6 @@
|
||||
#define TYPE_FD 3
|
||||
#define TYPE_DA 4
|
||||
|
||||
/* Buffers that must not span a 64k boundary. */
|
||||
static struct dmadat {
|
||||
char blkbuf[VBLKSIZE]; /* filesystem blocks */
|
||||
ufs_daddr_t indbuf[VBLKSIZE / sizeof(ufs_daddr_t)]; /* indir blocks */
|
||||
char sbbuf[SBSIZE]; /* superblock */
|
||||
char secbuf[DEV_BSIZE]; /* for MBR/disklabel */
|
||||
} *dmadat;
|
||||
|
||||
extern uint32_t _end;
|
||||
|
||||
static const char optstr[NOPT] = "DhaCcdgmnPprsv";
|
||||
@ -135,14 +108,11 @@ static struct dsk {
|
||||
unsigned part;
|
||||
unsigned start;
|
||||
int init;
|
||||
int meta;
|
||||
} dsk;
|
||||
static char cmd[512];
|
||||
static char kname[1024];
|
||||
static uint32_t opts;
|
||||
static struct bootinfo bootinfo;
|
||||
static int ls;
|
||||
static uint32_t fs_off;
|
||||
static uint8_t ioctrl = IO_KEYBOARD;
|
||||
|
||||
void exit(int);
|
||||
@ -179,30 +149,7 @@ strcmp(const char *s1, const char *s2)
|
||||
return (u_char)*s1 - (u_char)*s2;
|
||||
}
|
||||
|
||||
static inline int
|
||||
fsfind(const char *name, ino_t * ino)
|
||||
{
|
||||
char buf[DEV_BSIZE];
|
||||
struct dirent *d;
|
||||
char *s;
|
||||
ssize_t n;
|
||||
|
||||
fs_off = 0;
|
||||
while ((n = fsread(*ino, buf, DEV_BSIZE)) > 0)
|
||||
for (s = buf; s < buf + DEV_BSIZE;) {
|
||||
d = (void *)s;
|
||||
if (ls)
|
||||
printf("%s ", d->d_name);
|
||||
else if (!strcmp(name, d->d_name)) {
|
||||
*ino = d->d_fileno;
|
||||
return d->d_type;
|
||||
}
|
||||
s += d->d_reclen;
|
||||
}
|
||||
if (n != -1 && ls)
|
||||
putchar('\n');
|
||||
return 0;
|
||||
}
|
||||
#include "ufsread.c"
|
||||
|
||||
static inline int
|
||||
getchar(void)
|
||||
@ -505,7 +452,7 @@ parse(char *arg)
|
||||
dsk.drive = (dsk.type == TYPE_WD ||
|
||||
dsk.type == TYPE_AD ||
|
||||
dsk.type == TYPE_DA ? DRV_HARD : 0) + drv;
|
||||
dsk.meta = 0;
|
||||
dsk_meta = 0;
|
||||
fsread(0, NULL, 0);
|
||||
}
|
||||
if ((i = p - arg - !*(p - 1))) {
|
||||
@ -519,34 +466,6 @@ parse(char *arg)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ino_t
|
||||
lookup(const char *path)
|
||||
{
|
||||
char name[MAXNAMLEN + 1];
|
||||
const char *s;
|
||||
ino_t ino;
|
||||
ssize_t n;
|
||||
int dt;
|
||||
|
||||
ino = ROOTINO;
|
||||
dt = DT_DIR;
|
||||
for (;;) {
|
||||
if (*path == '/')
|
||||
path++;
|
||||
if (!*path)
|
||||
break;
|
||||
for (s = path; *s && *s != '/'; s++);
|
||||
if ((n = s - path) > MAXNAMLEN)
|
||||
return 0;
|
||||
ls = *path == '?' && n == 1 && !*s;
|
||||
memcpy(name, path, n);
|
||||
name[n] = 0;
|
||||
if ((dt = fsfind(name, &ino)) <= 0)
|
||||
break;
|
||||
path = s;
|
||||
}
|
||||
return dt == DT_REG ? ino : 0;
|
||||
}
|
||||
static int
|
||||
xfsread(ino_t inode, void *buf, size_t nbyte)
|
||||
{
|
||||
@ -557,83 +476,6 @@ xfsread(ino_t inode, void *buf, size_t nbyte)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
fsread(ino_t inode, void *buf, size_t nbyte)
|
||||
{
|
||||
static struct dinode din;
|
||||
static ino_t inomap;
|
||||
static daddr_t blkmap, indmap;
|
||||
char *blkbuf;
|
||||
ufs_daddr_t *indbuf;
|
||||
struct fs *fs;
|
||||
char *s;
|
||||
ufs_daddr_t lbn, addr;
|
||||
daddr_t vbaddr;
|
||||
size_t n, nb, off, vboff;
|
||||
|
||||
blkbuf = dmadat->blkbuf;
|
||||
indbuf = dmadat->indbuf;
|
||||
fs = (struct fs *)dmadat->sbbuf;
|
||||
if (!dsk.meta) {
|
||||
inomap = 0;
|
||||
if (dskread(fs, SBOFF / DEV_BSIZE, SBSIZE / DEV_BSIZE))
|
||||
return -1;
|
||||
if (fs->fs_magic != FS_MAGIC) {
|
||||
printf("Not ufs\n");
|
||||
return -1;
|
||||
}
|
||||
dsk.meta++;
|
||||
}
|
||||
if (!inode)
|
||||
return 0;
|
||||
if (inomap != inode) {
|
||||
if (dskread(blkbuf, INO_TO_VBA(fs, inode), DBPERVBLK))
|
||||
return -1;
|
||||
din = ((struct dinode *)blkbuf)[INO_TO_VBO(fs, inode)];
|
||||
inomap = inode;
|
||||
fs_off = 0;
|
||||
blkmap = indmap = 0;
|
||||
}
|
||||
s = buf;
|
||||
if (nbyte > (n = din.di_size - fs_off))
|
||||
nbyte = n;
|
||||
nb = nbyte;
|
||||
while (nb) {
|
||||
lbn = lblkno(fs, fs_off);
|
||||
off = blkoff(fs, fs_off);
|
||||
if (lbn < NDADDR)
|
||||
addr = din.di_db[lbn];
|
||||
else {
|
||||
vbaddr = FS_TO_VBA(fs, din.di_ib[0], sizeof(indbuf[0]) *
|
||||
((lbn - NDADDR) % NINDIR(fs)));
|
||||
if (indmap != vbaddr) {
|
||||
if (dskread(indbuf, vbaddr, DBPERVBLK))
|
||||
return -1;
|
||||
indmap = vbaddr;
|
||||
}
|
||||
addr = indbuf[(lbn - NDADDR) % INDIRPERVBLK];
|
||||
}
|
||||
vbaddr = FS_TO_VBA(fs, addr, off);
|
||||
vboff = FS_TO_VBO(fs, addr, off);
|
||||
n = dblksize(fs, &din, lbn) - (off & ~VBLKMASK);
|
||||
if (n > VBLKSIZE)
|
||||
n = VBLKSIZE;
|
||||
if (blkmap != vbaddr) {
|
||||
if (dskread(blkbuf, vbaddr, n >> DEV_BSHIFT))
|
||||
return -1;
|
||||
blkmap = vbaddr;
|
||||
}
|
||||
n -= vboff;
|
||||
if (n > nb)
|
||||
n = nb;
|
||||
memcpy(s, blkbuf + vboff, n);
|
||||
s += n;
|
||||
fs_off += n;
|
||||
nb -= n;
|
||||
}
|
||||
return nbyte;
|
||||
}
|
||||
|
||||
static int
|
||||
dskread(void *buf, unsigned lba, unsigned nblk)
|
||||
{
|
||||
@ -642,7 +484,7 @@ dskread(void *buf, unsigned lba, unsigned nblk)
|
||||
char *sec;
|
||||
unsigned sl, i;
|
||||
|
||||
if (!dsk.meta) {
|
||||
if (!dsk_meta) {
|
||||
sec = dmadat->secbuf;
|
||||
dsk.start = 0;
|
||||
if (drvread(sec, DOSBBSECTOR, 1))
|
||||
|
||||
Loading…
Reference in New Issue
Block a user