1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2016 Joyent, Inc. 25 * Copyright 2017 Nexenta Systems, Inc. All rights reserved. 26 */ 27 28 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 /* 32 * University Copyright- Copyright (c) 1982, 1986, 1988 33 * The Regents of the University of California 34 * All Rights Reserved 35 * 36 * University Acknowledgment- Portions of this document are derived from 37 * software developed by the University of California, Berkeley, and its 38 * contributors. 39 */ 40 41 #include <sys/types.h> 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/errno.h> 45 #include <sys/cred.h> 46 #include <sys/user.h> 47 #include <sys/uio.h> 48 #include <sys/vfs.h> 49 #include <sys/vnode.h> 50 #include <sys/pathname.h> 51 #include <sys/proc.h> 52 #include <sys/vtrace.h> 53 #include <sys/sysmacros.h> 54 #include <sys/debug.h> 55 #include <sys/dirent.h> 56 #include <sys/zone.h> 57 #include <sys/fs/snode.h> 58 59 #include <libfksmbfs.h> 60 61 extern vnode_t *rootdir; 62 63 /* 64 * Simplified variation on lookuppnvp() 65 */ 66 int 67 fake_lookup(vnode_t *dvp, char *path, vnode_t **vpp) 68 { 69 char component[MAXNAMELEN]; /* buffer for component */ 70 pathname_t pn; 71 cred_t *cr; 72 vnode_t *cvp; /* current component vp */ 73 vnode_t *nvp; /* next component vp */ 74 char *p; 75 int flags = 0; 76 int error, len; 77 78 bzero(&pn, sizeof (pn)); 79 pn.pn_buf = path; 80 pn.pn_path = path; 81 pn.pn_pathlen = strlen(path); 82 pn.pn_bufsize = pn.pn_pathlen + 1; 83 p = path; 84 85 cr = CRED(); 86 cvp = (dvp != NULL) ? dvp : rootdir; 87 VN_HOLD(cvp); 88 nvp = NULL; 89 90 while (*p != '\0') { 91 if (*p == '/') { 92 p++; 93 continue; 94 } 95 96 len = strcspn(p, "/"); 97 ASSERT(len > 0); 98 if (len >= MAXNAMELEN) 99 return (EINVAL); 100 (void) strncpy(component, p, len); 101 component[len] = '\0'; 102 pn.pn_path = p; 103 pn.pn_pathlen = strlen(p); 104 105 error = VOP_LOOKUP(cvp, component, &nvp, &pn, flags, 106 rootdir, cr, NULL, NULL, NULL); 107 VN_RELE(cvp); 108 if (error != 0) 109 return (error); 110 111 /* Lookup gave us a hold on nvp */ 112 cvp = nvp; 113 nvp = NULL; 114 p += len; 115 } 116 117 *vpp = cvp; 118 return (0); 119 } 120 121 /* 122 * Lookup the directory and find the start of the 123 * last component of the given path. 124 */ 125 int 126 fake_lookup_dir(char *path, vnode_t **vpp, char **lastcomp) 127 { 128 vnode_t *dvp; 129 char *last; 130 char *tpn = NULL; 131 int tpn_sz; 132 int lc_off; 133 int error; 134 135 *vpp = NULL; 136 *lastcomp = NULL; 137 138 tpn_sz = strlen(path) + 1; 139 tpn = kmem_alloc(tpn_sz, KM_SLEEP); 140 141 /* 142 * Get a copy of the path, and zap the last / 143 */ 144 bcopy(path, tpn, tpn_sz); 145 last = strrchr(tpn, '/'); 146 if (last == NULL) { 147 lc_off = 0; 148 dvp = rootdir; 149 VN_HOLD(dvp); 150 error = 0; 151 } else { 152 *last++ = '\0'; 153 if (*last == '\0') { 154 error = EINVAL; 155 goto out; 156 } 157 error = fake_lookup(rootdir, tpn, &dvp); 158 if (error != 0) { 159 /* dir not found */ 160 goto out; 161 } 162 lc_off = last - tpn; 163 ASSERT(lc_off >= 0 && lc_off < tpn_sz); 164 } 165 *vpp = dvp; 166 *lastcomp = path + lc_off; 167 168 out: 169 if (tpn != NULL) 170 kmem_free(tpn, tpn_sz); 171 172 return (error); 173 } 174