1 /* $NetBSD: bfs_sysvbfs.c,v 1.1 2005/12/29 14:53:45 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 41 __KERNEL_RCSID(0, "$NetBSD: bfs_sysvbfs.c,v 1.1 2005/12/29 14:53:45 tsutsui Exp $"); 42 43 #include <sys/param.h> 44 #include <sys/types.h> 45 #include <sys/systm.h> 46 #include <sys/buf.h> 47 #include <sys/malloc.h> 48 #include <fs/sysvbfs/bfs.h> 49 50 struct bc_io_ops { 51 struct sector_io_ops io; 52 struct vnode *vp; 53 struct ucred *cred; 54 }; 55 56 #define STATIC 57 58 STATIC boolean_t bc_read_n(void *, uint8_t *, daddr_t, int); 59 STATIC boolean_t bc_read(void *, uint8_t *, daddr_t); 60 STATIC boolean_t bc_write_n(void *, uint8_t *, daddr_t, int); 61 STATIC boolean_t bc_write(void *, uint8_t *, daddr_t); 62 63 int 64 sysvbfs_bfs_init(struct bfs **bfsp, struct vnode *vp) 65 { 66 struct bc_io_ops *bio; 67 68 if ((bio = malloc(sizeof(*bio), M_TEMP, M_WAITOK | M_ZERO)) == NULL) { 69 printf("can't allocate I/O ops.\n"); 70 return ENOMEM; 71 } 72 73 bio->io.read = bc_read; 74 bio->io.read_n = bc_read_n; 75 bio->io.write = bc_write; 76 bio->io.write_n = bc_write_n; 77 bio->vp = vp; 78 bio->cred = NOCRED; /* sysvbfs layer check cred. */ 79 80 return bfs_init2(bfsp, 0, (struct sector_io_ops *)bio, FALSE); 81 } 82 83 void 84 sysvbfs_bfs_fini(struct bfs *bfs) 85 { 86 87 free(bfs->io, M_TEMP); 88 bfs_fini(bfs); 89 } 90 91 STATIC boolean_t 92 bc_read_n(void *self, uint8_t *buf, daddr_t block, int count) 93 { 94 int i; 95 96 for (i = 0; i < count; i++) { 97 if (!bc_read(self, buf, block)) 98 return FALSE; 99 buf += DEV_BSIZE; 100 block++; 101 } 102 103 return TRUE; 104 } 105 106 STATIC boolean_t 107 bc_read(void *self, uint8_t *buf, daddr_t block) 108 { 109 struct bc_io_ops *bio = self; 110 struct buf *bp = NULL; 111 112 if (bread(bio->vp, block, DEV_BSIZE, bio->cred, &bp) != 0) 113 goto error_exit; 114 memcpy(buf, bp->b_data, DEV_BSIZE); 115 brelse(bp); 116 117 return TRUE; 118 error_exit: 119 printf("%s: block %lld read failed.\n", __FUNCTION__, block); 120 121 if (bp != NULL) 122 brelse(bp); 123 return FALSE; 124 } 125 126 STATIC boolean_t 127 bc_write_n(void *self, uint8_t *buf, daddr_t block, int count) 128 { 129 int i; 130 131 for (i = 0; i < count; i++) { 132 if (!bc_write(self, buf, block)) 133 return FALSE; 134 buf += DEV_BSIZE; 135 block++; 136 } 137 138 return TRUE; 139 } 140 141 STATIC boolean_t 142 bc_write(void *self, uint8_t *buf, daddr_t block) 143 { 144 struct bc_io_ops *bio = self; 145 struct buf *bp; 146 147 #if 0 148 printf("%s: block=%lld\n", __FUNCTION__, block); 149 #endif 150 if ((bp = getblk(bio->vp, block, DEV_BSIZE, 0, 0)) == 0) { 151 printf("getblk failed.\n"); 152 return FALSE; 153 } 154 memcpy(bp->b_data, buf, DEV_BSIZE); 155 156 if (bwrite(bp) != 0) { 157 printf("bwrite failed.\n"); 158 return FALSE; 159 } 160 161 return TRUE; 162 } 163