1/* $NetBSD: kobj.c,v 1.6 2019/01/27 02:08:35 pgoyette 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: head/sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c 285391 2015-07-11 16:22:48Z mjg $"); */ 60__KERNEL_RCSID(0, "$NetBSD: kobj.c,v 1.6 2019/01/27 02:08:35 pgoyette Exp $"); 61 62#include <sys/types.h> 63#include <sys/systm.h> 64#include <sys/kernel.h> 65#include <sys/kthread.h> 66#include <sys/namei.h> 67#include <sys/proc.h> 68#include <sys/filedesc.h> 69#include <sys/fcntl.h> 70#include <sys/kobj.h> 71 72void 73kobj_free(void *address, size_t size) 74{ 75 76 kmem_free(address, size); 77} 78 79void * 80kobj_alloc(size_t size, int flag) 81{ 82 83 return (kmem_alloc(size, (flag & KM_NOWAIT) ? KM_NOSLEEP : KM_SLEEP)); 84} 85 86void * 87kobj_zalloc(size_t size, int flag) 88{ 89 90 return (kmem_zalloc(size, (flag & KM_NOWAIT) ? KM_NOSLEEP : KM_SLEEP)); 91} 92 93static void * 94kobj_open_file_vnode(const char *file) 95{ 96 vnode_t *vp; 97 98 if (vn_open(file, UIO_SYSSPACE, FREAD|FCREAT, 0, &vp, CRCREAT, 0) != 0) { 99 return NULL; 100 } 101 return vp; 102} 103 104struct _buf * 105kobj_open_file(const char *file) 106{ 107 struct _buf *out; 108 109 out = kmem_alloc(sizeof(*out), KM_SLEEP); 110 out->mounted = 1; 111 out->ptr = kobj_open_file_vnode(file); 112 if (out->ptr == NULL) { 113 kmem_free(out, sizeof(*out)); 114 return ((struct _buf *)-1); 115 } 116 return (out); 117} 118 119static int 120kobj_get_filesize_vnode(struct _buf *file, uint64_t *size) 121{ 122 struct vattr va; 123 int error; 124 125 error = VOP_GETATTR(file->ptr, &va, 0, kcred, NULL); 126 if (error == 0) 127 *size = (uint64_t)va.va_size; 128 return (error); 129} 130 131int 132kobj_get_filesize(struct _buf *file, uint64_t *size) 133{ 134 135 return (kobj_get_filesize_vnode(file, size)); 136} 137 138int 139kobj_read_file_vnode(struct _buf *file, char *buf, unsigned size, unsigned off) 140{ 141 int error; 142 size_t resid; 143 144 error = vn_rdwr(UIO_READ, file->ptr, buf, size, off, UIO_SYSSPACE, 0, 145 RLIM64_INFINITY, kcred, &resid); 146 return (error != 0 ? -1 : size - resid); 147} 148 149int 150kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off) 151{ 152 153 return (kobj_read_file_vnode(file, buf, size, off)); 154} 155 156void 157kobj_close_file(struct _buf *file) 158{ 159 160 if (file->mounted) { 161 vn_close(file->ptr, FREAD, kcred); 162 } 163 kmem_free(file, sizeof(*file)); 164} 165