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
fake_lookup(vnode_t * dvp,char * path,vnode_t ** vpp)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
fake_lookup_dir(char * path,vnode_t ** vpp,char ** lastcomp)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