1 /* $NetBSD: kobj.c,v 1.2 2011/01/21 12:24:24 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 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 /*- 33 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org> 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 48 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 55 * SUCH DAMAGE. 56 */ 57 58 #include <sys/cdefs.h> 59 /* __FBSDID("$FreeBSD: src/sys/compat/opensolaris/kern/opensolaris_kobj.c,v 1.4 2007/05/31 11:51:49 kib Exp $"); */ 60 __KERNEL_RCSID(0, "$NetBSD: kobj.c,v 1.2 2011/01/21 12:24:24 pooka Exp $"); 61 62 #include <sys/types.h> 63 #include <sys/systm.h> 64 #include <sys/kernel.h> 65 #include <sys/systm.h> 66 #include <sys/kthread.h> 67 #include <sys/namei.h> 68 #include <sys/proc.h> 69 #include <sys/filedesc.h> 70 #include <sys/fcntl.h> 71 #include <sys/kobj.h> 72 #include <sys/namei.h> 73 74 void 75 kobj_free(void *address, size_t size) 76 { 77 78 kmem_free(address, size); 79 } 80 81 void * 82 kobj_alloc(size_t size, int flag) 83 { 84 85 return (kmem_alloc(size, (flag & KM_NOWAIT) ? KM_NOSLEEP : KM_SLEEP)); 86 } 87 88 void * 89 kobj_zalloc(size_t size, int flag) 90 { 91 92 return (kmem_zalloc(size, (flag & KM_NOWAIT) ? KM_NOSLEEP : KM_SLEEP)); 93 } 94 95 static void * 96 kobj_open_file_vnode(const char *file) 97 { 98 vnode_t *vp; 99 100 if (vn_open(file, UIO_SYSSPACE, FCREAT, 0, &vp, CRCREAT, 0) != 0) { 101 return NULL; 102 } 103 return vp; 104 } 105 106 struct _buf * 107 kobj_open_file(const char *file) 108 { 109 struct _buf *out; 110 111 out = kmem_alloc(sizeof(*out), KM_SLEEP); 112 out->mounted = 1; 113 out->ptr = kobj_open_file_vnode(file); 114 if (out->ptr == NULL) { 115 kmem_free(out, sizeof(*out)); 116 return ((struct _buf *)-1); 117 } 118 return (out); 119 } 120 121 static int 122 kobj_get_filesize_vnode(struct _buf *file, uint64_t *size) 123 { 124 struct vattr va; 125 int error; 126 127 error = VOP_GETATTR(file->ptr, &va, 0, kauth_cred_get(), NULL); 128 if (error == 0) 129 *size = (uint64_t)va.va_size; 130 return (error); 131 } 132 133 int 134 kobj_get_filesize(struct _buf *file, uint64_t *size) 135 { 136 137 return (kobj_get_filesize_vnode(file, size)); 138 } 139 140 int 141 kobj_read_file_vnode(struct _buf *file, char *buf, unsigned size, unsigned off) 142 { 143 int error; 144 size_t resid; 145 146 error = vn_rdwr(UIO_READ, file->ptr, buf, size, off, UIO_SYSSPACE, 0, 147 RLIM64_INFINITY, kauth_cred_get(), &resid); 148 return (error != 0 ? -1 : size - resid); 149 } 150 151 int 152 kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off) 153 { 154 155 return (kobj_read_file_vnode(file, buf, size, off)); 156 } 157 158 void 159 kobj_close_file(struct _buf *file) 160 { 161 162 if (file->mounted) { 163 vn_close(file->ptr, FREAD, kauth_cred_get()); 164 } 165 kmem_free(file, sizeof(*file)); 166 } 167