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 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <stdio.h>
27 #include <strings.h>
28 #include <unistd.h>
29 #include <stdarg.h>
30 #include <fcntl.h>
31 #include <stdlib.h>
32 #include <libnvpair.h>
33 #include <libdevinfo.h>
34 #include <syslog.h>
35 #include <sys/param.h>
36 #include <errno.h>
37 #include <assert.h>
38 #include <sys/systeminfo.h>
39 #include <sys/modctl.h>
40 #include <sys/fs/sdev_impl.h>
41
42 /*
43 * Private interfaces for non-global /dev profile
44 */
45
46 /*
47 * Allocate opaque data structure for passing profile to the kernel for
48 * the given mount point.
49 *
50 * Note that this interface returns an empty, initialized, profile.
51 * It does not return what may have been previously committed.
52 */
53 int
di_prof_init(const char * mountpt,di_prof_t * profp)54 di_prof_init(const char *mountpt, di_prof_t *profp)
55 {
56 nvlist_t *nvl;
57
58 if (nvlist_alloc(&nvl, 0, 0))
59 return (-1);
60
61 if (nvlist_add_string(nvl, SDEV_NVNAME_MOUNTPT, mountpt)) {
62 nvlist_free(nvl);
63 return (-1);
64 }
65
66 *profp = (di_prof_t)nvl;
67 return (0);
68 }
69
70 /*
71 * Free space allocated by di_prof_init().
72 */
73 void
di_prof_fini(di_prof_t prof)74 di_prof_fini(di_prof_t prof)
75 {
76 nvlist_free((nvlist_t *)prof);
77 }
78
79 /*
80 * Sends profile to the kernel.
81 */
82 int
di_prof_commit(di_prof_t prof)83 di_prof_commit(di_prof_t prof)
84 {
85 char *buf = NULL;
86 size_t buflen = 0;
87 int rv;
88
89 if (nvlist_pack((nvlist_t *)prof, &buf, &buflen, NV_ENCODE_NATIVE, 0))
90 return (-1);
91 rv = modctl(MODDEVNAME, MODDEVNAME_PROFILE, buf, buflen);
92 free(buf);
93 return (rv);
94 }
95
96 /*
97 * Add a device or directory to profile's include list.
98 *
99 * Note that there is no arbitration between conflicting
100 * include and exclude profile entries, most recent
101 * is the winner.
102 */
103 int
di_prof_add_dev(di_prof_t prof,const char * dev)104 di_prof_add_dev(di_prof_t prof, const char *dev)
105 {
106 if (nvlist_add_string((nvlist_t *)prof, SDEV_NVNAME_INCLUDE, dev))
107 return (-1);
108 return (0);
109 }
110
111 /*
112 * Add a device or directory to profile's exclude list.
113 * This can effectively remove a previously committed device.
114 */
115 int
di_prof_add_exclude(di_prof_t prof,const char * dev)116 di_prof_add_exclude(di_prof_t prof, const char *dev)
117 {
118 if (nvlist_add_string((nvlist_t *)prof, SDEV_NVNAME_EXCLUDE, dev))
119 return (-1);
120 return (0);
121 }
122
123 /*
124 * Add a symlink to profile.
125 */
126 int
di_prof_add_symlink(di_prof_t prof,const char * linkname,const char * target)127 di_prof_add_symlink(di_prof_t prof, const char *linkname, const char *target)
128 {
129 nvlist_t *nvl = (nvlist_t *)prof;
130 char *syml[2];
131
132 syml[0] = (char *)linkname; /* 1st entry must be the symlink */
133 syml[1] = (char *)target; /* 2nd entry must be the target */
134 if (nvlist_add_string_array(nvl, SDEV_NVNAME_SYMLINK, syml, 2))
135 return (-1);
136 return (0);
137 }
138
139 /*
140 * Add a name mapping to profile.
141 */
142 int
di_prof_add_map(di_prof_t prof,const char * source,const char * target)143 di_prof_add_map(di_prof_t prof, const char *source, const char *target)
144 {
145 nvlist_t *nvl = (nvlist_t *)prof;
146 char *map[2];
147
148 map[0] = (char *)source; /* 1st entry must be the source */
149 map[1] = (char *)target; /* 2nd entry must be the target */
150 if (nvlist_add_string_array(nvl, SDEV_NVNAME_MAP, map, 2))
151 return (-1);
152 return (0);
153 }
154