1 /* $NetBSD: devopen.c,v 1.1 2011/01/23 01:05:30 nisimura Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 34 #include <netinet/in.h> 35 36 #include <lib/libsa/stand.h> 37 #include <lib/libsa/nfs.h> 38 #include <lib/libsa/ufs.h> 39 #include <lib/libsa/tftp.h> 40 #include <lib/libkern/libkern.h> 41 42 #include "globals.h" 43 44 struct devsw devnet = { "net", net_strategy, net_open, net_close, noioctl }; 45 struct devsw devdsk = { "dsk", dsk_strategy, dsk_open, dsk_close, noioctl }; 46 47 struct fs_ops file_system[1] = { FS_OPS(null) }; 48 int nfsys = 1; 49 struct fs_ops fs_nfs = FS_OPS(nfs); 50 struct fs_ops fs_tftp = FS_OPS(tftp); 51 struct fs_ops fs_ffsv2 = FS_OPS(ffsv2); 52 struct fs_ops fs_ffsv1 = FS_OPS(ffsv1); 53 extern char *fsmod; 54 55 static void parseunit(const char *, int *, int *, char **); 56 57 int 58 devopen(struct open_file *of, const char *name, char **file) 59 { 60 int error; 61 int unit, part; 62 extern char bootfile[]; /* handed by DHCP */ 63 64 if (of->f_flags != F_READ) 65 return EPERM; 66 67 if (strncmp("net:", name, 4) == 0 || strncmp("nfs:", name, 4) == 0) { 68 of->f_dev = &devnet; 69 if ((error = net_open(of, &name[4], "nfs")) != 0) 70 return error; 71 file_system[0] = fs_nfs; 72 *file = bootfile; /* resolved fname */ 73 return 0; /* NFS */ 74 } 75 if (strncmp("tftp:", name, 5) == 0) { 76 of->f_dev = &devnet; 77 if ((error = net_open(of, &name[5], "tftp")) != 0) 78 return error; 79 file_system[0] = fs_tftp; 80 *file = bootfile; /* resolved fname */ 81 return 0; /* TFTP */ 82 } 83 if (name[0] == 'w' && name[1] == 'd') { 84 parseunit(&name[2], &unit, &part, file); 85 of->f_dev = &devdsk; 86 if (*file == NULL || **file <= ' ') 87 *file = "netbsd"; 88 if ((error = dsk_open(of, unit, part, *file)) != 0) 89 return error; 90 file_system[0] = *dsk_fsops(of); 91 return 0; /* FFS */ 92 } 93 return ENOENT; 94 } 95 96 static void 97 parseunit(const char *name, int *unitp, int *partp, char **pathp) 98 { 99 const char *p = name; 100 int unit, part; 101 102 unit = part = -1; 103 while (*p != ':' && *p != '\0') { 104 if (unit == -1 && *p >= '0' && *p <= '9') 105 unit = *p - '0'; 106 if (part == -1 && *p >= 'a' && *p < 'a' + 16) 107 part = *p - 'a'; 108 p += 1; 109 } 110 *unitp = (unit == -1) ? 0 : unit; 111 *partp = (part == -1) ? 0 : part; 112 *pathp = (*p == ':') ? (char *)p + 1 : NULL; 113 } 114 115 /* ARGSUSED */ 116 int 117 noioctl(struct open_file *f, u_long cmd, void *data) 118 { 119 120 return EINVAL; 121 } 122