158 lines
3.9 KiB
C
158 lines
3.9 KiB
C
/* $NetBSD: bfs_sysvbfs.c,v 1.11 2015/03/28 19:24:05 maxv Exp $ */
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/*-
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* Copyright (c) 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by UCHIYAMA Yasushi.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: bfs_sysvbfs.c,v 1.11 2015/03/28 19:24:05 maxv Exp $");
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/kauth.h>
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#include <fs/sysvbfs/bfs.h>
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struct bc_io_ops {
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struct sector_io_ops io;
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struct vnode *vp;
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kauth_cred_t cred;
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};
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#define STATIC
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STATIC bool bc_read_n(void *, uint8_t *, daddr_t, int);
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STATIC bool bc_read(void *, uint8_t *, daddr_t);
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STATIC bool bc_write_n(void *, uint8_t *, daddr_t, int);
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STATIC bool bc_write(void *, uint8_t *, daddr_t);
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int
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sysvbfs_bfs_init(struct bfs **bfsp, struct vnode *vp)
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{
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struct bc_io_ops *bio;
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if ((bio = malloc(sizeof(*bio), M_TEMP, M_WAITOK | M_ZERO)) == NULL) {
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printf("can't allocate I/O ops.\n");
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return ENOMEM;
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}
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bio->io.read = bc_read;
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bio->io.read_n = bc_read_n;
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bio->io.write = bc_write;
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bio->io.write_n = bc_write_n;
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bio->vp = vp;
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bio->cred = NOCRED; /* sysvbfs layer check cred. */
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return bfs_init2(bfsp, 0, (struct sector_io_ops *)bio, false);
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}
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void
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sysvbfs_bfs_fini(struct bfs *bfs)
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{
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free(bfs->io, M_TEMP);
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bfs_fini(bfs);
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}
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STATIC bool
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bc_read_n(void *self, uint8_t *buf, daddr_t block, int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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if (!bc_read(self, buf, block))
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return false;
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buf += DEV_BSIZE;
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block++;
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}
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return true;
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}
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STATIC bool
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bc_read(void *self, uint8_t *buf, daddr_t block)
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{
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struct bc_io_ops *bio = self;
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struct buf *bp = NULL;
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if (bread(bio->vp, block, DEV_BSIZE, 0, &bp) != 0)
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goto error_exit;
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memcpy(buf, bp->b_data, DEV_BSIZE);
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brelse(bp, 0);
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return true;
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error_exit:
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printf("%s: block %lld read failed.\n", __func__,
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(long long int)block);
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if (bp != NULL)
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brelse(bp, 0);
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return false;
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}
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STATIC bool
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bc_write_n(void *self, uint8_t *buf, daddr_t block, int count)
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{
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int i;
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for (i = 0; i < count; i++) {
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if (!bc_write(self, buf, block))
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return false;
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buf += DEV_BSIZE;
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block++;
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}
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return true;
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}
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STATIC bool
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bc_write(void *self, uint8_t *buf, daddr_t block)
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{
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struct bc_io_ops *bio = self;
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struct buf *bp;
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#if 0
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printf("%s: block=%lld\n", __func__, block);
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#endif
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if ((bp = getblk(bio->vp, block, DEV_BSIZE, 0, 0)) == 0) {
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printf("getblk failed.\n");
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return false;
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}
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memcpy(bp->b_data, buf, DEV_BSIZE);
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if (bwrite(bp) != 0) {
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printf("bwrite failed.\n");
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return false;
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}
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return true;
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}
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