devopen.c revision 1.2.2.2
1 1.2.2.2 joerg /* $NetBSD: devopen.c,v 1.2.2.2 2007/10/31 23:13:57 joerg Exp $ */ 2 1.2.2.2 joerg 3 1.2.2.2 joerg /*- 4 1.2.2.2 joerg * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 1.2.2.2 joerg * All rights reserved. 6 1.2.2.2 joerg * 7 1.2.2.2 joerg * This code is derived from software contributed to The NetBSD Foundation 8 1.2.2.2 joerg * by Rolf Grossmann. 9 1.2.2.2 joerg * 10 1.2.2.2 joerg * Redistribution and use in source and binary forms, with or without 11 1.2.2.2 joerg * modification, are permitted provided that the following conditions 12 1.2.2.2 joerg * are met: 13 1.2.2.2 joerg * 1. Redistributions of source code must retain the above copyright 14 1.2.2.2 joerg * notice, this list of conditions and the following disclaimer. 15 1.2.2.2 joerg * 2. Redistributions in binary form must reproduce the above copyright 16 1.2.2.2 joerg * notice, this list of conditions and the following disclaimer in the 17 1.2.2.2 joerg * documentation and/or other materials provided with the distribution. 18 1.2.2.2 joerg * 3. All advertising materials mentioning features or use of this software 19 1.2.2.2 joerg * must display the following acknowledgement: 20 1.2.2.2 joerg * This product includes software developed by the NetBSD 21 1.2.2.2 joerg * Foundation, Inc. and its contributors. 22 1.2.2.2 joerg * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.2.2.2 joerg * contributors may be used to endorse or promote products derived 24 1.2.2.2 joerg * from this software without specific prior written permission. 25 1.2.2.2 joerg * 26 1.2.2.2 joerg * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.2.2.2 joerg * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.2.2.2 joerg * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.2.2.2 joerg * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.2.2.2 joerg * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.2.2.2 joerg * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.2.2.2 joerg * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.2.2.2 joerg * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.2.2.2 joerg * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.2.2.2 joerg * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.2.2.2 joerg * POSSIBILITY OF SUCH DAMAGE. 37 1.2.2.2 joerg */ 38 1.2.2.2 joerg 39 1.2.2.2 joerg #include <lib/libsa/stand.h> 40 1.2.2.2 joerg #include <lib/libkern/libkern.h> 41 1.2.2.2 joerg 42 1.2.2.2 joerg #include "boot.h" 43 1.2.2.2 joerg 44 1.2.2.2 joerg /* 45 1.2.2.2 joerg * Parse a device spec. 46 1.2.2.2 joerg * 47 1.2.2.2 joerg * Format: 48 1.2.2.2 joerg * [device:][filename] 49 1.2.2.2 joerg */ 50 1.2.2.2 joerg int 51 1.2.2.2 joerg devparse(const char *fname, int *dev, uint8_t *unit, uint8_t *part, 52 1.2.2.2 joerg const char **file) 53 1.2.2.2 joerg { 54 1.2.2.2 joerg const char *col; 55 1.2.2.2 joerg 56 1.2.2.2 joerg *unit = 0; /* default to wd0a */ 57 1.2.2.2 joerg *part = 0; 58 1.2.2.2 joerg *dev = 0; 59 1.2.2.2 joerg *file = DEFKERNELNAME; 60 1.2.2.2 joerg 61 1.2.2.2 joerg if (fname == NULL) 62 1.2.2.2 joerg return 0; 63 1.2.2.2 joerg 64 1.2.2.2 joerg if ((col = strchr(fname, ':')) != NULL) { 65 1.2.2.2 joerg int devlen; 66 1.2.2.2 joerg uint8_t i, u, p; 67 1.2.2.2 joerg struct devsw *dp; 68 1.2.2.2 joerg char devname[MAXDEVNAME]; 69 1.2.2.2 joerg 70 1.2.2.2 joerg devlen = col - fname; 71 1.2.2.2 joerg if (devlen > MAXDEVNAME) 72 1.2.2.2 joerg return EINVAL; 73 1.2.2.2 joerg 74 1.2.2.2 joerg #define isnum(c) (((c) >= '0') && ((c) <= '9')) 75 1.2.2.2 joerg #define isalpha(c) (((c) >= 'a') && ((c) <= 'z')) 76 1.2.2.2 joerg 77 1.2.2.2 joerg /* extract device name */ 78 1.2.2.2 joerg for (i = 0; isalpha(fname[i]) && (i < devlen); i++) 79 1.2.2.2 joerg devname[i] = fname[i]; 80 1.2.2.2 joerg devname[i] = '\0'; 81 1.2.2.2 joerg 82 1.2.2.2 joerg if (strcmp(devname, "nfs") == 0) { 83 1.2.2.2 joerg /* no unit number or partition suffix on netboot */ 84 1.2.2.2 joerg u = 0; 85 1.2.2.2 joerg p = 0; 86 1.2.2.2 joerg } else { 87 1.2.2.2 joerg /* parse [disk][unit][part] (ex. wd0a) strings */ 88 1.2.2.2 joerg if (!isnum(fname[i])) 89 1.2.2.2 joerg return EUNIT; 90 1.2.2.2 joerg 91 1.2.2.2 joerg /* device number */ 92 1.2.2.2 joerg for (u = 0; isnum(fname[i]) && (i < devlen); i++) 93 1.2.2.2 joerg u = u * 10 + (fname[i] - '0'); 94 1.2.2.2 joerg 95 1.2.2.2 joerg if (!isalpha(fname[i])) 96 1.2.2.2 joerg return EPART; 97 1.2.2.2 joerg 98 1.2.2.2 joerg /* partition number */ 99 1.2.2.2 joerg if (i < devlen) 100 1.2.2.2 joerg p = fname[i++] - 'a'; 101 1.2.2.2 joerg 102 1.2.2.2 joerg if (i != devlen) 103 1.2.2.2 joerg return ENXIO; 104 1.2.2.2 joerg } 105 1.2.2.2 joerg 106 1.2.2.2 joerg /* check device name */ 107 1.2.2.2 joerg for (dp = devsw, i = 0; i < ndevs; dp++, i++) { 108 1.2.2.2 joerg if (dp->dv_name && !strcmp(devname, dp->dv_name)) 109 1.2.2.2 joerg break; 110 1.2.2.2 joerg } 111 1.2.2.2 joerg 112 1.2.2.2 joerg if (i >= ndevs) 113 1.2.2.2 joerg return ENXIO; 114 1.2.2.2 joerg 115 1.2.2.2 joerg *unit = u; 116 1.2.2.2 joerg *part = p; 117 1.2.2.2 joerg *dev = i; 118 1.2.2.2 joerg fname = ++col; 119 1.2.2.2 joerg } 120 1.2.2.2 joerg 121 1.2.2.2 joerg if (*fname) 122 1.2.2.2 joerg *file = fname; 123 1.2.2.2 joerg 124 1.2.2.2 joerg return 0; 125 1.2.2.2 joerg } 126 1.2.2.2 joerg 127 1.2.2.2 joerg int 128 1.2.2.2 joerg devopen(struct open_file *f, const char *fname, char **file) 129 1.2.2.2 joerg { 130 1.2.2.2 joerg struct devsw *dp; 131 1.2.2.2 joerg uint8_t unit, part; 132 1.2.2.2 joerg int dev, error; 133 1.2.2.2 joerg 134 1.2.2.2 joerg DPRINTF(("devopen(%s)\n", fname)); 135 1.2.2.2 joerg 136 1.2.2.2 joerg if ((error = devparse(fname, &dev, &unit, &part, 137 1.2.2.2 joerg (const char **)file)) != 0) 138 1.2.2.2 joerg return error; 139 1.2.2.2 joerg 140 1.2.2.2 joerg dp = &devsw[dev]; 141 1.2.2.2 joerg if ((void *)dp->dv_open == (void *)nodev) 142 1.2.2.2 joerg return ENXIO; 143 1.2.2.2 joerg 144 1.2.2.2 joerg f->f_dev = dp; 145 1.2.2.2 joerg 146 1.2.2.2 joerg if ((error = (*dp->dv_open)(f, unit, part)) != 0) 147 1.2.2.2 joerg printf("%s%d%c: %d = %s\n", devsw[dev].dv_name, 148 1.2.2.2 joerg unit, 'a' + part, error, strerror(error)); 149 1.2.2.2 joerg 150 1.2.2.2 joerg return error; 151 1.2.2.2 joerg } 152
Indexes created Tue Sep 30 20:09:53 GMT 2025