kern_ktrace_vfs.c revision 1.1.10.2
1 1.1.10.2 tls /* $NetBSD: kern_ktrace_vfs.c,v 1.1.10.2 2014/08/20 00:04:29 tls Exp $ */ 2 1.1.10.2 tls 3 1.1.10.2 tls /*- 4 1.1.10.2 tls * Copyright (c) 2006, 2007, 2008 The NetBSD Foundation, Inc. 5 1.1.10.2 tls * All rights reserved. 6 1.1.10.2 tls * 7 1.1.10.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.1.10.2 tls * by Andrew Doran. 9 1.1.10.2 tls * 10 1.1.10.2 tls * Redistribution and use in source and binary forms, with or without 11 1.1.10.2 tls * modification, are permitted provided that the following conditions 12 1.1.10.2 tls * are met: 13 1.1.10.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.1.10.2 tls * notice, this list of conditions and the following disclaimer. 15 1.1.10.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.10.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.1.10.2 tls * documentation and/or other materials provided with the distribution. 18 1.1.10.2 tls * 19 1.1.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.10.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.10.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.10.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.10.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.10.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.10.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.10.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.10.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.10.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.10.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.1.10.2 tls */ 31 1.1.10.2 tls 32 1.1.10.2 tls /* 33 1.1.10.2 tls * Copyright (c) 1989, 1993 34 1.1.10.2 tls * The Regents of the University of California. All rights reserved. 35 1.1.10.2 tls * 36 1.1.10.2 tls * Redistribution and use in source and binary forms, with or without 37 1.1.10.2 tls * modification, are permitted provided that the following conditions 38 1.1.10.2 tls * are met: 39 1.1.10.2 tls * 1. Redistributions of source code must retain the above copyright 40 1.1.10.2 tls * notice, this list of conditions and the following disclaimer. 41 1.1.10.2 tls * 2. Redistributions in binary form must reproduce the above copyright 42 1.1.10.2 tls * notice, this list of conditions and the following disclaimer in the 43 1.1.10.2 tls * documentation and/or other materials provided with the distribution. 44 1.1.10.2 tls * 3. Neither the name of the University nor the names of its contributors 45 1.1.10.2 tls * may be used to endorse or promote products derived from this software 46 1.1.10.2 tls * without specific prior written permission. 47 1.1.10.2 tls * 48 1.1.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 1.1.10.2 tls * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 1.1.10.2 tls * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 1.1.10.2 tls * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 1.1.10.2 tls * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 1.1.10.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 1.1.10.2 tls * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 1.1.10.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 1.1.10.2 tls * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 1.1.10.2 tls * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 1.1.10.2 tls * SUCH DAMAGE. 59 1.1.10.2 tls * 60 1.1.10.2 tls * @(#)kern_ktrace.c 8.5 (Berkeley) 5/14/95 61 1.1.10.2 tls */ 62 1.1.10.2 tls 63 1.1.10.2 tls #include <sys/cdefs.h> 64 1.1.10.2 tls __KERNEL_RCSID(0, "$NetBSD: kern_ktrace_vfs.c,v 1.1.10.2 2014/08/20 00:04:29 tls Exp $"); 65 1.1.10.2 tls 66 1.1.10.2 tls #include <sys/param.h> 67 1.1.10.2 tls #include <sys/systm.h> 68 1.1.10.2 tls #include <sys/file.h> 69 1.1.10.2 tls #include <sys/filedesc.h> 70 1.1.10.2 tls #include <sys/namei.h> 71 1.1.10.2 tls #include <sys/vnode.h> 72 1.1.10.2 tls #include <sys/kernel.h> 73 1.1.10.2 tls #include <sys/ktrace.h> 74 1.1.10.2 tls #include <sys/kauth.h> 75 1.1.10.2 tls 76 1.1.10.2 tls #include <sys/mount.h> 77 1.1.10.2 tls #include <sys/syscallargs.h> 78 1.1.10.2 tls 79 1.1.10.2 tls /* 80 1.1.10.2 tls * ktrace system call, the part of the ktrace framework that 81 1.1.10.2 tls * explicitly interacts with VFS 82 1.1.10.2 tls */ 83 1.1.10.2 tls /* ARGSUSED */ 84 1.1.10.2 tls int 85 1.1.10.2 tls sys_ktrace(struct lwp *l, const struct sys_ktrace_args *uap, register_t *retval) 86 1.1.10.2 tls { 87 1.1.10.2 tls /* { 88 1.1.10.2 tls syscallarg(const char *) fname; 89 1.1.10.2 tls syscallarg(int) ops; 90 1.1.10.2 tls syscallarg(int) facs; 91 1.1.10.2 tls syscallarg(int) pid; 92 1.1.10.2 tls } */ 93 1.1.10.2 tls struct vnode *vp = NULL; 94 1.1.10.2 tls file_t *fp = NULL; 95 1.1.10.2 tls struct pathbuf *pb; 96 1.1.10.2 tls struct nameidata nd; 97 1.1.10.2 tls int error = 0; 98 1.1.10.2 tls int fd; 99 1.1.10.2 tls 100 1.1.10.2 tls if (ktrenter(l)) 101 1.1.10.2 tls return EAGAIN; 102 1.1.10.2 tls 103 1.1.10.2 tls if (KTROP(SCARG(uap, ops)) != KTROP_CLEAR) { 104 1.1.10.2 tls /* 105 1.1.10.2 tls * an operation which requires a file argument. 106 1.1.10.2 tls */ 107 1.1.10.2 tls error = pathbuf_copyin(SCARG(uap, fname), &pb); 108 1.1.10.2 tls if (error) { 109 1.1.10.2 tls ktrexit(l); 110 1.1.10.2 tls return (error); 111 1.1.10.2 tls } 112 1.1.10.2 tls NDINIT(&nd, LOOKUP, FOLLOW, pb); 113 1.1.10.2 tls if ((error = vn_open(&nd, FREAD|FWRITE, 0)) != 0) { 114 1.1.10.2 tls pathbuf_destroy(pb); 115 1.1.10.2 tls ktrexit(l); 116 1.1.10.2 tls return (error); 117 1.1.10.2 tls } 118 1.1.10.2 tls vp = nd.ni_vp; 119 1.1.10.2 tls pathbuf_destroy(pb); 120 1.1.10.2 tls VOP_UNLOCK(vp); 121 1.1.10.2 tls if (vp->v_type != VREG) { 122 1.1.10.2 tls vn_close(vp, FREAD|FWRITE, l->l_cred); 123 1.1.10.2 tls ktrexit(l); 124 1.1.10.2 tls return (EACCES); 125 1.1.10.2 tls } 126 1.1.10.2 tls /* 127 1.1.10.2 tls * This uses up a file descriptor slot in the 128 1.1.10.2 tls * tracing process for the duration of this syscall. 129 1.1.10.2 tls * This is not expected to be a problem. 130 1.1.10.2 tls */ 131 1.1.10.2 tls if ((error = fd_allocfile(&fp, &fd)) != 0) { 132 1.1.10.2 tls vn_close(vp, FWRITE, l->l_cred); 133 1.1.10.2 tls ktrexit(l); 134 1.1.10.2 tls return error; 135 1.1.10.2 tls } 136 1.1.10.2 tls fp->f_flag = FWRITE; 137 1.1.10.2 tls fp->f_type = DTYPE_VNODE; 138 1.1.10.2 tls fp->f_ops = &vnops; 139 1.1.10.2 tls fp->f_data = (void *)vp; 140 1.1.10.2 tls vp = NULL; 141 1.1.10.2 tls } 142 1.1.10.2 tls error = ktrace_common(l, SCARG(uap, ops), SCARG(uap, facs), 143 1.1.10.2 tls SCARG(uap, pid), &fp); 144 1.1.10.2 tls if (KTROP(SCARG(uap, ops)) != KTROP_CLEAR) 145 1.1.10.2 tls fd_abort(curproc, fp, fd); 146 1.1.10.2 tls return (error); 147 1.1.10.2 tls } 148
Indexes created Mon Sep 22 05:09:51 GMT 2025