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86e3c28a CIK |
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 = { | |
b3a88519 CIK |
39 | .modm_install = mod_null, |
40 | .modm_remove = mod_null, | |
41 | .modm_info = mod_infonull | |
86e3c28a CIK |
42 | }; |
43 | ||
44 | /* | |
45 | * Null operation; return 0. | |
46 | */ | |
47 | static int | |
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 | |
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 | |
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 | |
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 | |
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 | } |