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0b04990a TC |
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 | mod_null, mod_null, mod_infonull | |
40 | }; | |
41 | ||
42 | /* | |
43 | * Null operation; return 0. | |
44 | */ | |
45 | static int | |
46 | mod_null(struct modlmisc *modl, struct modlinkage *modlp) | |
47 | { | |
48 | return (0); | |
49 | } | |
50 | ||
51 | /* | |
52 | * Status for User modules. | |
53 | */ | |
54 | static int | |
55 | mod_infonull(void *modl, struct modlinkage *modlp, int *p0) | |
56 | { | |
57 | *p0 = -1; /* for modinfo display */ | |
58 | return (0); | |
59 | } | |
60 | ||
61 | /* | |
62 | * Install a module. | |
63 | * (This routine is in the Solaris SPARC DDI/DKI) | |
64 | */ | |
65 | int | |
66 | mod_install(struct modlinkage *modlp) | |
67 | { | |
68 | int retval = -1; /* No linkage structures */ | |
69 | struct modlmisc **linkpp; | |
70 | struct modlmisc **linkpp1; | |
71 | ||
72 | if (modlp->ml_rev != MODREV_1) { | |
73 | cmn_err(CE_WARN, "mod_install: " | |
02730c33 | 74 | "modlinkage structure is not MODREV_1\n"); |
0b04990a TC |
75 | return (EINVAL); |
76 | } | |
77 | linkpp = (struct modlmisc **)&modlp->ml_linkage[0]; | |
78 | ||
79 | while (*linkpp != NULL) { | |
80 | if ((retval = MODL_INSTALL(*linkpp, modlp)) != 0) { | |
81 | linkpp1 = (struct modlmisc **)&modlp->ml_linkage[0]; | |
82 | ||
83 | while (linkpp1 != linkpp) { | |
84 | MODL_REMOVE(*linkpp1, modlp); /* clean up */ | |
85 | linkpp1++; | |
86 | } | |
87 | break; | |
88 | } | |
89 | linkpp++; | |
90 | } | |
91 | return (retval); | |
92 | } | |
93 | ||
94 | static char *reins_err = | |
95 | "Could not reinstall %s\nReboot to correct the problem"; | |
96 | ||
97 | /* | |
98 | * Remove a module. This is called by the module wrapper routine. | |
99 | * (This routine is in the Solaris SPARC DDI/DKI) | |
100 | */ | |
101 | int | |
102 | mod_remove(struct modlinkage *modlp) | |
103 | { | |
104 | int retval = 0; | |
105 | struct modlmisc **linkpp, *last_linkp; | |
106 | ||
107 | linkpp = (struct modlmisc **)&modlp->ml_linkage[0]; | |
108 | ||
109 | while (*linkpp != NULL) { | |
110 | if ((retval = MODL_REMOVE(*linkpp, modlp)) != 0) { | |
111 | last_linkp = *linkpp; | |
112 | linkpp = (struct modlmisc **)&modlp->ml_linkage[0]; | |
113 | while (*linkpp != last_linkp) { | |
114 | if (MODL_INSTALL(*linkpp, modlp) != 0) { | |
115 | cmn_err(CE_WARN, reins_err, | |
116 | (*linkpp)->misc_linkinfo); | |
117 | break; | |
118 | } | |
119 | linkpp++; | |
120 | } | |
121 | break; | |
122 | } | |
123 | linkpp++; | |
124 | } | |
125 | return (retval); | |
126 | } | |
127 | ||
128 | /* | |
129 | * Get module status. | |
130 | * (This routine is in the Solaris SPARC DDI/DKI) | |
131 | */ | |
132 | int | |
133 | mod_info(struct modlinkage *modlp, struct modinfo *modinfop) | |
134 | { | |
135 | int i; | |
136 | int retval = 0; | |
137 | struct modspecific_info *msip; | |
138 | struct modlmisc **linkpp; | |
139 | ||
140 | modinfop->mi_rev = modlp->ml_rev; | |
141 | ||
142 | linkpp = (struct modlmisc **)modlp->ml_linkage; | |
143 | msip = &modinfop->mi_msinfo[0]; | |
144 | ||
145 | for (i = 0; i < MODMAXLINK; i++) { | |
146 | if (*linkpp == NULL) { | |
147 | msip->msi_linkinfo[0] = '\0'; | |
148 | } else { | |
1f723944 | 149 | (void) strlcpy(msip->msi_linkinfo, |
0b04990a TC |
150 | (*linkpp)->misc_linkinfo, MODMAXLINKINFOLEN); |
151 | retval = MODL_INFO(*linkpp, modlp, &msip->msi_p0); | |
152 | if (retval != 0) | |
153 | break; | |
154 | linkpp++; | |
155 | } | |
156 | msip++; | |
157 | } | |
158 | ||
159 | if (modinfop->mi_info == MI_INFO_LINKAGE) { | |
160 | /* | |
161 | * Slight kludge used to extract the address of the | |
162 | * modlinkage structure from the module (just after | |
163 | * loading a module for the very first time) | |
164 | */ | |
165 | modinfop->mi_base = (void *)modlp; | |
166 | } | |
167 | ||
168 | if (retval == 0) | |
169 | return (1); | |
170 | return (0); | |
02730c33 | 171 | } |