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 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #include <sys/zfs_context.h>
27 #include <sys/modctl.h>
28
29 /*
30 * Null operations; used for uninitialized and "misc" modules.
31 */
32 static int mod_null(struct modlmisc *, struct modlinkage *);
33 static int mod_infonull(void *, struct modlinkage *, int *);
34
35 /*
36 * Cryptographic Modules
37 */
38 struct mod_ops mod_cryptoops = {
39 .modm_install = mod_null,
40 .modm_remove = mod_null,
41 .modm_info = mod_infonull
42 };
43
44 /*
45 * Null operation; return 0.
46 */
47 static int
mod_null(struct modlmisc * modl,struct modlinkage * modlp)48 mod_null(struct modlmisc *modl, struct modlinkage *modlp)
49 {
50 return (0);
51 }
52
53 /*
54 * Status for User modules.
55 */
56 static int
mod_infonull(void * modl,struct modlinkage * modlp,int * p0)57 mod_infonull(void *modl, struct modlinkage *modlp, int *p0)
58 {
59 *p0 = -1; /* for modinfo display */
60 return (0);
61 }
62
63 /*
64 * Install a module.
65 * (This routine is in the Solaris SPARC DDI/DKI)
66 */
67 int
mod_install(struct modlinkage * modlp)68 mod_install(struct modlinkage *modlp)
69 {
70 int retval = -1; /* No linkage structures */
71 struct modlmisc **linkpp;
72 struct modlmisc **linkpp1;
73
74 if (modlp->ml_rev != MODREV_1) {
75 cmn_err(CE_WARN, "mod_install: "
76 "modlinkage structure is not MODREV_1\n");
77 return (EINVAL);
78 }
79 linkpp = (struct modlmisc **)&modlp->ml_linkage[0];
80
81 while (*linkpp != NULL) {
82 if ((retval = MODL_INSTALL(*linkpp, modlp)) != 0) {
83 linkpp1 = (struct modlmisc **)&modlp->ml_linkage[0];
84
85 while (linkpp1 != linkpp) {
86 MODL_REMOVE(*linkpp1, modlp); /* clean up */
87 linkpp1++;
88 }
89 break;
90 }
91 linkpp++;
92 }
93 return (retval);
94 }
95
96 static char *reins_err =
97 "Could not reinstall %s\nReboot to correct the problem";
98
99 /*
100 * Remove a module. This is called by the module wrapper routine.
101 * (This routine is in the Solaris SPARC DDI/DKI)
102 */
103 int
mod_remove(struct modlinkage * modlp)104 mod_remove(struct modlinkage *modlp)
105 {
106 int retval = 0;
107 struct modlmisc **linkpp, *last_linkp;
108
109 linkpp = (struct modlmisc **)&modlp->ml_linkage[0];
110
111 while (*linkpp != NULL) {
112 if ((retval = MODL_REMOVE(*linkpp, modlp)) != 0) {
113 last_linkp = *linkpp;
114 linkpp = (struct modlmisc **)&modlp->ml_linkage[0];
115 while (*linkpp != last_linkp) {
116 if (MODL_INSTALL(*linkpp, modlp) != 0) {
117 cmn_err(CE_WARN, reins_err,
118 (*linkpp)->misc_linkinfo);
119 break;
120 }
121 linkpp++;
122 }
123 break;
124 }
125 linkpp++;
126 }
127 return (retval);
128 }
129
130 /*
131 * Get module status.
132 * (This routine is in the Solaris SPARC DDI/DKI)
133 */
134 int
mod_info(struct modlinkage * modlp,struct modinfo * modinfop)135 mod_info(struct modlinkage *modlp, struct modinfo *modinfop)
136 {
137 int i;
138 int retval = 0;
139 struct modspecific_info *msip;
140 struct modlmisc **linkpp;
141
142 modinfop->mi_rev = modlp->ml_rev;
143
144 linkpp = (struct modlmisc **)modlp->ml_linkage;
145 msip = &modinfop->mi_msinfo[0];
146
147 for (i = 0; i < MODMAXLINK; i++) {
148 if (*linkpp == NULL) {
149 msip->msi_linkinfo[0] = '\0';
150 } else {
151 (void) strlcpy(msip->msi_linkinfo,
152 (*linkpp)->misc_linkinfo, MODMAXLINKINFOLEN);
153 retval = MODL_INFO(*linkpp, modlp, &msip->msi_p0);
154 if (retval != 0)
155 break;
156 linkpp++;
157 }
158 msip++;
159 }
160
161 if (modinfop->mi_info == MI_INFO_LINKAGE) {
162 /*
163 * Slight kludge used to extract the address of the
164 * modlinkage structure from the module (just after
165 * loading a module for the very first time)
166 */
167 modinfop->mi_base = (void *)modlp;
168 }
169
170 if (retval == 0)
171 return (1);
172 return (0);
173 }
174