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head/usr.sbin/makefs/ffs/buf.c

/* $NetBSD: buf.c,v 1.12 2004/06/20 22:20:18 jmc Exp $ */ /* $NetBSD: buf.c,v 1.13 2004/06/20 22:20:18 jmc Exp $ */
/* /*
* Copyright (c) 2001 Wasabi Systems, Inc. * Copyright (c) 2001 Wasabi Systems, Inc.
* All rights reserved. * All rights reserved.
* *
* Written by Luke Mewburn for Wasabi Systems, Inc. * Written by Luke Mewburn for Wasabi Systems, Inc.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
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#include "ffs/buf.h" #include "ffs/buf.h"
#include "ffs/ufs_inode.h" #include "ffs/ufs_inode.h"
extern int sectorsize; /* XXX: from ffs.c & mkfs.c */ extern int sectorsize; /* XXX: from ffs.c & mkfs.c */
TAILQ_HEAD(buftailhead,buf) buftail; TAILQ_HEAD(buftailhead,buf) buftail;
int int
bread(int fd, struct fs *fs, daddr_t blkno, int size, struct buf **bpp) bread(struct vnode *vp, daddr_t blkno, int size, struct ucred *u1 __unused,
struct buf **bpp)
{ {
off_t offset; off_t offset;
ssize_t rv; ssize_t rv;
struct fs *fs = vp->fs;
assert (fs != NULL); assert (fs != NULL);
assert (bpp != NULL); assert (bpp != NULL);
if (debug & DEBUG_BUF_BREAD) if (debug & DEBUG_BUF_BREAD)
printf("bread: fs %p blkno %lld size %d\n", printf("bread: fs %p blkno %lld size %d\n",
fs, (long long)blkno, size); fs, (long long)blkno, size);
*bpp = getblk(fd, fs, blkno, size); *bpp = getblk(vp, blkno, size, 0, 0, 0);
offset = (*bpp)->b_blkno * sectorsize; /* XXX */ offset = (*bpp)->b_blkno * sectorsize; /* XXX */
if (debug & DEBUG_BUF_BREAD) if (debug & DEBUG_BUF_BREAD)
printf("bread: bp %p blkno %lld offset %lld bcount %ld\n", printf("bread: bp %p blkno %lld offset %lld bcount %ld\n",
(*bpp), (long long)(*bpp)->b_blkno, (long long) offset, (*bpp), (long long)(*bpp)->b_blkno, (long long) offset,
(*bpp)->b_bcount); (*bpp)->b_bcount);
if (lseek((*bpp)->b_fd, offset, SEEK_SET) == -1) if (lseek((*bpp)->b_fd, offset, SEEK_SET) == -1)
err(1, "bread: lseek %lld (%lld)", err(1, "bread: lseek %lld (%lld)",
(long long)(*bpp)->b_blkno, (long long)offset); (long long)(*bpp)->b_blkno, (long long)offset);
rv = read((*bpp)->b_fd, (*bpp)->b_data, (*bpp)->b_bcount); rv = read((*bpp)->b_fd, (*bpp)->b_data, (*bpp)->b_bcount);
if (debug & DEBUG_BUF_BREAD) if (debug & DEBUG_BUF_BREAD)
printf("bread: read %ld (%lld) returned %d\n", printf("bread: read %ld (%lld) returned %d\n",
(*bpp)->b_bcount, (long long)offset, (int)rv); (*bpp)->b_bcount, (long long)offset, (int)rv);
if (rv == -1) /* read error */ if (rv == -1) /* read error */
err(1, "bread: read %ld (%lld) returned %d", err(1, "bread: read %ld (%lld) returned %d",
(*bpp)->b_bcount, (long long)offset, (int)rv); (*bpp)->b_bcount, (long long)offset, (int)rv);
else if (rv != (*bpp)->b_bcount) /* short read */ else if (rv != (*bpp)->b_bcount) /* short read */
err(1, "bread: read %ld (%lld) returned %d", err(1, "bread: read %ld (%lld) returned %d",
(*bpp)->b_bcount, (long long)offset, (int)rv); (*bpp)->b_bcount, (long long)offset, (int)rv);
else else
return (0); return (0);
} }
void void
brelse(struct buf *bp) brelse(struct buf *bp, int u1 __unused)
{ {
assert (bp != NULL); assert (bp != NULL);
assert (bp->b_data != NULL); assert (bp->b_data != NULL);
if (bp->b_lblkno < 0) { if (bp->b_lblkno < 0) {
/* /*
* XXX don't remove any buffers with negative logical block * XXX don't remove any buffers with negative logical block
▲ Show 20 Lines • Show All 62 Lines • ▼ Show 20 Lines TAILQ_FOREACH(bp, &buftail, b_tailq) {
printf("\tlblkno %10lld blkno %10lld count %6ld bufsize %6ld\n", printf("\tlblkno %10lld blkno %10lld count %6ld bufsize %6ld\n",
(long long)bp->b_lblkno, (long long)bp->b_blkno, (long long)bp->b_lblkno, (long long)bp->b_blkno,
bp->b_bcount, bp->b_bufsize); bp->b_bcount, bp->b_bufsize);
} }
printf("bcleanup: done\n"); printf("bcleanup: done\n");
} }
struct buf * struct buf *
getblk(int fd, struct fs *fs, daddr_t blkno, int size) getblk(struct vnode *vp, daddr_t blkno, int size, int u1 __unused,
int u2 __unused, int u3 __unused)
{ {
static int buftailinitted; static int buftailinitted;
struct buf *bp; struct buf *bp;
void *n; void *n;
int fd = vp->fd;
struct fs *fs = vp->fs;
blkno += vp->offset;
assert (fs != NULL); assert (fs != NULL);
if (debug & DEBUG_BUF_GETBLK) if (debug & DEBUG_BUF_GETBLK)
printf("getblk: fs %p blkno %lld size %d\n", fs, printf("getblk: fs %p blkno %lld size %d\n", fs,
(long long)blkno, size); (long long)blkno, size);
bp = NULL; bp = NULL;
if (!buftailinitted) { if (!buftailinitted) {
if (debug & DEBUG_BUF_GETBLK) if (debug & DEBUG_BUF_GETBLK)
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