kern_module_vfs.c revision 1.3.2.2
1 1.3.2.2 yamt /* $NetBSD: kern_module_vfs.c,v 1.3.2.2 2010/03/11 15:04:17 yamt Exp $ */ 2 1.3.2.2 yamt 3 1.3.2.2 yamt /*- 4 1.3.2.2 yamt * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 1.3.2.2 yamt * All rights reserved. 6 1.3.2.2 yamt * 7 1.3.2.2 yamt * This code is derived from software developed for The NetBSD Foundation 8 1.3.2.2 yamt * by Andrew Doran. 9 1.3.2.2 yamt * 10 1.3.2.2 yamt * Redistribution and use in source and binary forms, with or without 11 1.3.2.2 yamt * modification, are permitted provided that the following conditions 12 1.3.2.2 yamt * are met: 13 1.3.2.2 yamt * 1. Redistributions of source code must retain the above copyright 14 1.3.2.2 yamt * notice, this list of conditions and the following disclaimer. 15 1.3.2.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.2.2 yamt * notice, this list of conditions and the following disclaimer in the 17 1.3.2.2 yamt * documentation and/or other materials provided with the distribution. 18 1.3.2.2 yamt * 19 1.3.2.2 yamt * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.3.2.2 yamt * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.3.2.2 yamt * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.3.2.2 yamt * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.3.2.2 yamt * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.3.2.2 yamt * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.3.2.2 yamt * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.3.2.2 yamt * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.3.2.2 yamt * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.3.2.2 yamt * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.3.2.2 yamt * POSSIBILITY OF SUCH DAMAGE. 30 1.3.2.2 yamt */ 31 1.3.2.2 yamt 32 1.3.2.2 yamt /* 33 1.3.2.2 yamt * Kernel module file system interaction. 34 1.3.2.2 yamt */ 35 1.3.2.2 yamt 36 1.3.2.2 yamt #include <sys/cdefs.h> 37 1.3.2.2 yamt __KERNEL_RCSID(0, "$NetBSD: kern_module_vfs.c,v 1.3.2.2 2010/03/11 15:04:17 yamt Exp $"); 38 1.3.2.2 yamt 39 1.3.2.2 yamt #define _MODULE_INTERNAL 40 1.3.2.2 yamt #include <sys/param.h> 41 1.3.2.2 yamt #include <sys/fcntl.h> 42 1.3.2.2 yamt #include <sys/kmem.h> 43 1.3.2.2 yamt #include <sys/kobj.h> 44 1.3.2.2 yamt #include <sys/module.h> 45 1.3.2.2 yamt #include <sys/namei.h> 46 1.3.2.2 yamt #include <sys/pool.h> 47 1.3.2.2 yamt #include <sys/stat.h> 48 1.3.2.2 yamt #include <sys/vnode.h> 49 1.3.2.2 yamt 50 1.3.2.2 yamt #include <prop/proplib.h> 51 1.3.2.2 yamt 52 1.3.2.2 yamt static int module_load_plist_vfs(const char *, const bool, 53 1.3.2.2 yamt prop_dictionary_t *); 54 1.3.2.2 yamt 55 1.3.2.2 yamt int 56 1.3.2.2 yamt module_load_vfs(const char *name, int flags, bool autoload, 57 1.3.2.2 yamt module_t *mod, prop_dictionary_t *filedictp) 58 1.3.2.2 yamt { 59 1.3.2.2 yamt char *path; 60 1.3.2.2 yamt bool nochroot; 61 1.3.2.2 yamt int error; 62 1.3.2.2 yamt 63 1.3.2.2 yamt nochroot = false; 64 1.3.2.2 yamt error = 0; 65 1.3.2.2 yamt path = NULL; 66 1.3.2.2 yamt if (filedictp) 67 1.3.2.2 yamt *filedictp = NULL; 68 1.3.2.2 yamt path = PNBUF_GET(); 69 1.3.2.2 yamt 70 1.3.2.2 yamt if (!autoload) { 71 1.3.2.2 yamt nochroot = false; 72 1.3.2.2 yamt snprintf(path, MAXPATHLEN, "%s", name); 73 1.3.2.2 yamt error = kobj_load_vfs(&mod->mod_kobj, path, nochroot); 74 1.3.2.2 yamt } 75 1.3.2.2 yamt if (autoload || (error == ENOENT)) { 76 1.3.2.2 yamt nochroot = true; 77 1.3.2.2 yamt snprintf(path, MAXPATHLEN, "%s/%s/%s.kmod", 78 1.3.2.2 yamt module_base, name, name); 79 1.3.2.2 yamt error = kobj_load_vfs(&mod->mod_kobj, path, nochroot); 80 1.3.2.2 yamt } 81 1.3.2.2 yamt if (error != 0) { 82 1.3.2.2 yamt PNBUF_PUT(path); 83 1.3.2.2 yamt if (autoload) { 84 1.3.2.2 yamt module_print("Cannot load kernel object `%s'" 85 1.3.2.2 yamt " error=%d", name, error); 86 1.3.2.2 yamt } else { 87 1.3.2.2 yamt module_error("Cannot load kernel object `%s'" 88 1.3.2.2 yamt " error=%d", name, error); 89 1.3.2.2 yamt } 90 1.3.2.2 yamt return error; 91 1.3.2.2 yamt } 92 1.3.2.2 yamt 93 1.3.2.2 yamt /* 94 1.3.2.2 yamt * Load and process <module>.prop if it exists. 95 1.3.2.2 yamt */ 96 1.3.2.2 yamt if ((flags & MODCTL_NO_PROP) == 0 && filedictp) { 97 1.3.2.2 yamt error = module_load_plist_vfs(path, nochroot, filedictp); 98 1.3.2.2 yamt if (error != 0) { 99 1.3.2.2 yamt module_print("plist load returned error %d for `%s'", 100 1.3.2.2 yamt error, path); 101 1.3.2.2 yamt if (error != ENOENT) 102 1.3.2.2 yamt goto fail; 103 1.3.2.2 yamt } 104 1.3.2.2 yamt } 105 1.3.2.2 yamt 106 1.3.2.2 yamt PNBUF_PUT(path); 107 1.3.2.2 yamt return 0; 108 1.3.2.2 yamt 109 1.3.2.2 yamt fail: 110 1.3.2.2 yamt kobj_unload(mod->mod_kobj); 111 1.3.2.2 yamt PNBUF_PUT(path); 112 1.3.2.2 yamt return error; 113 1.3.2.2 yamt } 114 1.3.2.2 yamt 115 1.3.2.2 yamt /* 116 1.3.2.2 yamt * module_load_plist_vfs: 117 1.3.2.2 yamt * 118 1.3.2.2 yamt * Load a plist located in the file system into memory. 119 1.3.2.2 yamt */ 120 1.3.2.2 yamt static int 121 1.3.2.2 yamt module_load_plist_vfs(const char *modpath, const bool nochroot, 122 1.3.2.2 yamt prop_dictionary_t *filedictp) 123 1.3.2.2 yamt { 124 1.3.2.2 yamt struct nameidata nd; 125 1.3.2.2 yamt struct stat sb; 126 1.3.2.2 yamt void *base; 127 1.3.2.2 yamt char *proppath; 128 1.3.2.2 yamt const size_t plistsize = 8192; 129 1.3.2.2 yamt size_t resid; 130 1.3.2.2 yamt int error, pathlen; 131 1.3.2.2 yamt 132 1.3.2.2 yamt KASSERT(filedictp != NULL); 133 1.3.2.2 yamt base = NULL; 134 1.3.2.2 yamt 135 1.3.2.2 yamt proppath = PNBUF_GET(); 136 1.3.2.2 yamt strcpy(proppath, modpath); 137 1.3.2.2 yamt pathlen = strlen(proppath); 138 1.3.2.2 yamt if ((pathlen >= 5) && (strcmp(&proppath[pathlen - 5], ".kmod") == 0)) { 139 1.3.2.2 yamt strcpy(&proppath[pathlen - 5], ".prop"); 140 1.3.2.2 yamt } else if (pathlen < MAXPATHLEN - 5) { 141 1.3.2.2 yamt strcat(proppath, ".prop"); 142 1.3.2.2 yamt } else { 143 1.3.2.2 yamt error = ENOENT; 144 1.3.2.2 yamt goto out1; 145 1.3.2.2 yamt } 146 1.3.2.2 yamt 147 1.3.2.2 yamt NDINIT(&nd, LOOKUP, FOLLOW | (nochroot ? NOCHROOT : 0), 148 1.3.2.2 yamt UIO_SYSSPACE, proppath); 149 1.3.2.2 yamt 150 1.3.2.2 yamt error = namei(&nd); 151 1.3.2.2 yamt if (error != 0) { 152 1.3.2.2 yamt goto out1; 153 1.3.2.2 yamt } 154 1.3.2.2 yamt 155 1.3.2.2 yamt error = vn_stat(nd.ni_vp, &sb); 156 1.3.2.2 yamt if (error != 0) { 157 1.3.2.2 yamt goto out1; 158 1.3.2.2 yamt } 159 1.3.2.2 yamt if (sb.st_size >= (plistsize - 1)) { /* leave space for term \0 */ 160 1.3.2.2 yamt error = EFBIG; 161 1.3.2.2 yamt goto out1; 162 1.3.2.2 yamt } 163 1.3.2.2 yamt 164 1.3.2.2 yamt error = vn_open(&nd, FREAD, 0); 165 1.3.2.2 yamt if (error != 0) { 166 1.3.2.2 yamt goto out1; 167 1.3.2.2 yamt } 168 1.3.2.2 yamt 169 1.3.2.2 yamt base = kmem_alloc(plistsize, KM_SLEEP); 170 1.3.2.2 yamt if (base == NULL) { 171 1.3.2.2 yamt error = ENOMEM; 172 1.3.2.2 yamt goto out; 173 1.3.2.2 yamt } 174 1.3.2.2 yamt 175 1.3.2.2 yamt error = vn_rdwr(UIO_READ, nd.ni_vp, base, sb.st_size, 0, 176 1.3.2.2 yamt UIO_SYSSPACE, IO_NODELOCKED, curlwp->l_cred, &resid, curlwp); 177 1.3.2.2 yamt *((uint8_t *)base + sb.st_size) = '\0'; 178 1.3.2.2 yamt if (error == 0 && resid != 0) { 179 1.3.2.2 yamt error = EFBIG; 180 1.3.2.2 yamt } 181 1.3.2.2 yamt if (error != 0) { 182 1.3.2.2 yamt kmem_free(base, plistsize); 183 1.3.2.2 yamt base = NULL; 184 1.3.2.2 yamt goto out; 185 1.3.2.2 yamt } 186 1.3.2.2 yamt 187 1.3.2.2 yamt *filedictp = prop_dictionary_internalize(base); 188 1.3.2.2 yamt if (*filedictp == NULL) { 189 1.3.2.2 yamt error = EINVAL; 190 1.3.2.2 yamt } 191 1.3.2.2 yamt kmem_free(base, plistsize); 192 1.3.2.2 yamt base = NULL; 193 1.3.2.2 yamt KASSERT(error == 0); 194 1.3.2.2 yamt 195 1.3.2.2 yamt out: 196 1.3.2.2 yamt VOP_UNLOCK(nd.ni_vp, 0); 197 1.3.2.2 yamt vn_close(nd.ni_vp, FREAD, kauth_cred_get()); 198 1.3.2.2 yamt 199 1.3.2.2 yamt out1: 200 1.3.2.2 yamt PNBUF_PUT(proppath); 201 1.3.2.2 yamt return error; 202 1.3.2.2 yamt } 203
Indexes created Thu Sep 25 08:09:54 GMT 2025