diff options
Diffstat (limited to 'usr.sbin/makefs/ffs/buf.c')
-rw-r--r-- | usr.sbin/makefs/ffs/buf.c | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/usr.sbin/makefs/ffs/buf.c b/usr.sbin/makefs/ffs/buf.c deleted file mode 100644 index 08fb627..0000000 --- a/usr.sbin/makefs/ffs/buf.c +++ /dev/null @@ -1,222 +0,0 @@ -/* $NetBSD: buf.c,v 1.12 2004/06/20 22:20:18 jmc Exp $ */ - -/* - * Copyright (c) 2001 Wasabi Systems, Inc. - * All rights reserved. - * - * Written by Luke Mewburn for Wasabi Systems, Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed for the NetBSD Project by - * Wasabi Systems, Inc. - * 4. The name of Wasabi Systems, Inc. may not be used to endorse - * or promote products derived from this software without specific prior - * written permission. - * - * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/time.h> - -#include <assert.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> - -#include "makefs.h" - -#include <ufs/ufs/dinode.h> -#include <ufs/ffs/fs.h> - -#include "ffs/buf.h" -#include "ffs/ufs_inode.h" - -extern int sectorsize; /* XXX: from ffs.c & mkfs.c */ - -TAILQ_HEAD(buftailhead,buf) buftail; - -int -bread(int fd, struct fs *fs, daddr_t blkno, int size, struct buf **bpp) -{ - off_t offset; - ssize_t rv; - - assert (fs != NULL); - assert (bpp != NULL); - - if (debug & DEBUG_BUF_BREAD) - printf("bread: fs %p blkno %lld size %d\n", - fs, (long long)blkno, size); - *bpp = getblk(fd, fs, blkno, size); - offset = (*bpp)->b_blkno * sectorsize; /* XXX */ - if (debug & DEBUG_BUF_BREAD) - printf("bread: bp %p blkno %lld offset %lld bcount %ld\n", - (*bpp), (long long)(*bpp)->b_blkno, (long long) offset, - (*bpp)->b_bcount); - if (lseek((*bpp)->b_fd, offset, SEEK_SET) == -1) - err(1, "bread: lseek %lld (%lld)", - (long long)(*bpp)->b_blkno, (long long)offset); - rv = read((*bpp)->b_fd, (*bpp)->b_data, (*bpp)->b_bcount); - if (debug & DEBUG_BUF_BREAD) - printf("bread: read %ld (%lld) returned %d\n", - (*bpp)->b_bcount, (long long)offset, (int)rv); - if (rv == -1) /* read error */ - err(1, "bread: read %ld (%lld) returned %d", - (*bpp)->b_bcount, (long long)offset, (int)rv); - else if (rv != (*bpp)->b_bcount) /* short read */ - err(1, "bread: read %ld (%lld) returned %d", - (*bpp)->b_bcount, (long long)offset, (int)rv); - else - return (0); -} - -void -brelse(struct buf *bp) -{ - - assert (bp != NULL); - assert (bp->b_data != NULL); - - if (bp->b_lblkno < 0) { - /* - * XXX don't remove any buffers with negative logical block - * numbers (lblkno), so that we retain the mapping - * of negative lblkno -> real blkno that ffs_balloc() - * sets up. - * - * if we instead released these buffers, and implemented - * ufs_strategy() (and ufs_bmaparray()) and called those - * from bread() and bwrite() to convert the lblkno to - * a real blkno, we'd add a lot more code & complexity - * and reading off disk, for little gain, because this - * simple hack works for our purpose. - */ - bp->b_bcount = 0; - return; - } - - TAILQ_REMOVE(&buftail, bp, b_tailq); - free(bp->b_data); - free(bp); -} - -int -bwrite(struct buf *bp) -{ - off_t offset; - ssize_t rv; - - assert (bp != NULL); - offset = bp->b_blkno * sectorsize; /* XXX */ - if (debug & DEBUG_BUF_BWRITE) - printf("bwrite: bp %p blkno %lld offset %lld bcount %ld\n", - bp, (long long)bp->b_blkno, (long long) offset, - bp->b_bcount); - if (lseek(bp->b_fd, offset, SEEK_SET) == -1) - return (errno); - rv = write(bp->b_fd, bp->b_data, bp->b_bcount); - if (debug & DEBUG_BUF_BWRITE) - printf("bwrite: write %ld (offset %lld) returned %lld\n", - bp->b_bcount, (long long)offset, (long long)rv); - if (rv == bp->b_bcount) - return (0); - else if (rv == -1) /* write error */ - return (errno); - else /* short write ? */ - return (EAGAIN); -} - -void -bcleanup(void) -{ - struct buf *bp; - - /* - * XXX this really shouldn't be necessary, but i'm curious to - * know why there's still some buffers lying around that - * aren't brelse()d - */ - - if (TAILQ_EMPTY(&buftail)) - return; - - printf("bcleanup: unflushed buffers:\n"); - TAILQ_FOREACH(bp, &buftail, b_tailq) { - printf("\tlblkno %10lld blkno %10lld count %6ld bufsize %6ld\n", - (long long)bp->b_lblkno, (long long)bp->b_blkno, - bp->b_bcount, bp->b_bufsize); - } - printf("bcleanup: done\n"); -} - -struct buf * -getblk(int fd, struct fs *fs, daddr_t blkno, int size) -{ - static int buftailinitted; - struct buf *bp; - void *n; - - assert (fs != NULL); - if (debug & DEBUG_BUF_GETBLK) - printf("getblk: fs %p blkno %lld size %d\n", fs, - (long long)blkno, size); - - bp = NULL; - if (!buftailinitted) { - if (debug & DEBUG_BUF_GETBLK) - printf("getblk: initialising tailq\n"); - TAILQ_INIT(&buftail); - buftailinitted = 1; - } else { - TAILQ_FOREACH(bp, &buftail, b_tailq) { - if (bp->b_lblkno != blkno) - continue; - break; - } - } - if (bp == NULL) { - if ((bp = calloc(1, sizeof(struct buf))) == NULL) - err(1, "getblk: calloc"); - - bp->b_bufsize = 0; - bp->b_blkno = bp->b_lblkno = blkno; - bp->b_fd = fd; - bp->b_fs = fs; - bp->b_data = NULL; - TAILQ_INSERT_HEAD(&buftail, bp, b_tailq); - } - bp->b_bcount = size; - if (bp->b_data == NULL || bp->b_bcount > bp->b_bufsize) { - n = realloc(bp->b_data, size); - if (n == NULL) - err(1, "getblk: realloc b_data %ld", bp->b_bcount); - bp->b_data = n; - bp->b_bufsize = size; - } - - return (bp); -} |