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1/*
2 * libkmod - interface to kernel module operations
3 *
e6b0e49b 4 * Copyright (C) 2011-2013 ProFUSION embedded systems
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5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
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8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
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10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
dea2dfee 17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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18 */
19
e8fd8fec 20#pragma once
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21#ifndef _LIBKMOD_H_
22#define _LIBKMOD_H_
586fc304 23
6806a043 24#include <fcntl.h>
586fc304 25#include <stdarg.h>
00178629 26#include <stdbool.h>
5369797d 27#include <inttypes.h>
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28
29#ifdef __cplusplus
30extern "C" {
31#endif
32
33/*
34 * kmod_ctx
35 *
36 * library user context - reads the config and system
37 * environment, user variables, allows custom logging
38 */
39struct kmod_ctx;
6a829211 40struct kmod_ctx *kmod_new(const char *dirname, const char * const *config_paths);
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41struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx);
42struct kmod_ctx *kmod_unref(struct kmod_ctx *ctx);
586fc304 43void kmod_set_log_fn(struct kmod_ctx *ctx,
1bdd951e 44 void (*log_fn)(void *log_data,
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45 int priority, const char *file, int line,
46 const char *fn, const char *format,
47 va_list args),
1bdd951e 48 const void *data);
6d177553 49int kmod_get_log_priority(const struct kmod_ctx *ctx);
586fc304 50void kmod_set_log_priority(struct kmod_ctx *ctx, int priority);
6d177553 51void *kmod_get_userdata(const struct kmod_ctx *ctx);
1ce08a56 52void kmod_set_userdata(struct kmod_ctx *ctx, const void *userdata);
9226ddad 53
b87d01d6 54const char *kmod_get_dirname(const struct kmod_ctx *ctx);
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55
56/*
57 * Management of libkmod's resources
58 */
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59int kmod_load_resources(struct kmod_ctx *ctx);
60void kmod_unload_resources(struct kmod_ctx *ctx);
586fc304 61
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62enum kmod_resources {
63 KMOD_RESOURCES_OK = 0,
64 KMOD_RESOURCES_MUST_RELOAD = 1,
65 KMOD_RESOURCES_MUST_RECREATE = 2,
66};
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67int kmod_validate_resources(struct kmod_ctx *ctx);
68
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69enum kmod_index {
70 KMOD_INDEX_MODULES_DEP = 0,
71 KMOD_INDEX_MODULES_ALIAS,
72 KMOD_INDEX_MODULES_SYMBOL,
b866b216 73 KMOD_INDEX_MODULES_BUILTIN_ALIAS,
3805274b 74 KMOD_INDEX_MODULES_BUILTIN,
b08314f7 75 /* Padding to make sure enum is not mapped to char */
867da6fc 76 _KMOD_INDEX_PAD = 1U << 31,
b08314f7 77};
0224482e 78int kmod_dump_index(struct kmod_ctx *ctx, enum kmod_index type, int fd);
758428a7 79
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80/*
81 * kmod_list
82 *
83 * access to kmod generated lists
84 */
6924e47a 85struct kmod_list;
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86struct kmod_list *kmod_list_next(const struct kmod_list *list,
87 const struct kmod_list *curr);
88struct kmod_list *kmod_list_prev(const struct kmod_list *list,
89 const struct kmod_list *curr);
90struct kmod_list *kmod_list_last(const struct kmod_list *list);
d5ec60bc 91
6924e47a 92#define kmod_list_foreach(list_entry, first_entry) \
586fc304 93 for (list_entry = first_entry; \
e4351b05 94 list_entry != NULL; \
6924e47a 95 list_entry = kmod_list_next(first_entry, list_entry))
586fc304 96
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97#define kmod_list_foreach_reverse(list_entry, first_entry) \
98 for (list_entry = kmod_list_last(first_entry); \
99 list_entry != NULL; \
100 list_entry = kmod_list_prev(first_entry, list_entry))
101
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102/*
103 * kmod_config_iter
104 *
105 * access to configuration lists - it allows to get each configuration's
106 * key/value stored by kmod
107 */
108struct kmod_config_iter;
109struct kmod_config_iter *kmod_config_get_blacklists(const struct kmod_ctx *ctx);
110struct kmod_config_iter *kmod_config_get_install_commands(const struct kmod_ctx *ctx);
111struct kmod_config_iter *kmod_config_get_remove_commands(const struct kmod_ctx *ctx);
112struct kmod_config_iter *kmod_config_get_aliases(const struct kmod_ctx *ctx);
113struct kmod_config_iter *kmod_config_get_options(const struct kmod_ctx *ctx);
114struct kmod_config_iter *kmod_config_get_softdeps(const struct kmod_ctx *ctx);
115const char *kmod_config_iter_get_key(const struct kmod_config_iter *iter);
116const char *kmod_config_iter_get_value(const struct kmod_config_iter *iter);
117bool kmod_config_iter_next(struct kmod_config_iter *iter);
118void kmod_config_iter_free_iter(struct kmod_config_iter *iter);
119
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120/*
121 * kmod_module
122 *
123 * Operate on kernel modules
124 */
125struct kmod_module;
126int kmod_module_new_from_name(struct kmod_ctx *ctx, const char *name,
127 struct kmod_module **mod);
128int kmod_module_new_from_path(struct kmod_ctx *ctx, const char *path,
129 struct kmod_module **mod);
130int kmod_module_new_from_lookup(struct kmod_ctx *ctx, const char *given_alias,
131 struct kmod_list **list);
132int kmod_module_new_from_loaded(struct kmod_ctx *ctx,
133 struct kmod_list **list);
134
135struct kmod_module *kmod_module_ref(struct kmod_module *mod);
136struct kmod_module *kmod_module_unref(struct kmod_module *mod);
137int kmod_module_unref_list(struct kmod_list *list);
138struct kmod_module *kmod_module_get_module(const struct kmod_list *entry);
139
140
f39dc70e 141/* Removal flags */
423f856a 142enum kmod_remove {
6806a043 143 KMOD_REMOVE_FORCE = O_TRUNC,
7ab88044 144 KMOD_REMOVE_NOWAIT = O_NONBLOCK, /* always set */
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145};
146
f39dc70e 147/* Insertion flags */
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148enum kmod_insert {
149 KMOD_INSERT_FORCE_VERMAGIC = 0x1,
150 KMOD_INSERT_FORCE_MODVERSION = 0x2,
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151};
152
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153/* Flags to kmod_module_probe_insert_module() */
154enum kmod_probe {
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155 KMOD_PROBE_FORCE_VERMAGIC = 0x00001,
156 KMOD_PROBE_FORCE_MODVERSION = 0x00002,
157 KMOD_PROBE_IGNORE_COMMAND = 0x00004,
7c10c69c 158 KMOD_PROBE_IGNORE_LOADED = 0x00008,
4c1ffb75 159 KMOD_PROBE_DRY_RUN = 0x00010,
814a57ba 160 KMOD_PROBE_FAIL_ON_LOADED = 0x00020,
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161
162 /* codes below can be used in return value, too */
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163 KMOD_PROBE_APPLY_BLACKLIST_ALL = 0x10000,
164 KMOD_PROBE_APPLY_BLACKLIST = 0x20000,
6882017f 165 KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY = 0x40000,
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166};
167
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168/* Flags to kmod_module_apply_filter() */
169enum kmod_filter {
170 KMOD_FILTER_BLACKLIST = 0x00001,
171 KMOD_FILTER_BUILTIN = 0x00002,
172};
173
8f788d58 174int kmod_module_remove_module(struct kmod_module *mod, unsigned int flags);
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175int kmod_module_insert_module(struct kmod_module *mod, unsigned int flags,
176 const char *options);
ddbda022 177int kmod_module_probe_insert_module(struct kmod_module *mod,
6a829211 178 unsigned int flags, const char *extra_options,
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179 int (*run_install)(struct kmod_module *m,
180 const char *cmdline, void *data),
6bd0713d 181 const void *data,
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182 void (*print_action)(struct kmod_module *m, bool install,
183 const char *options));
184
8f788d58 185
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186const char *kmod_module_get_name(const struct kmod_module *mod);
187const char *kmod_module_get_path(const struct kmod_module *mod);
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188const char *kmod_module_get_options(const struct kmod_module *mod);
189const char *kmod_module_get_install_commands(const struct kmod_module *mod);
190const char *kmod_module_get_remove_commands(const struct kmod_module *mod);
191struct kmod_list *kmod_module_get_dependencies(const struct kmod_module *mod);
192int kmod_module_get_softdeps(const struct kmod_module *mod,
193 struct kmod_list **pre, struct kmod_list **post);
194int kmod_module_get_filtered_blacklist(const struct kmod_ctx *ctx,
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195 const struct kmod_list *input,
196 struct kmod_list **output) __attribute__ ((deprecated));
197int kmod_module_apply_filter(const struct kmod_ctx *ctx,
198 enum kmod_filter filter_type,
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199 const struct kmod_list *input,
200 struct kmod_list **output);
201
202
203
204/*
205 * Information regarding "live information" from module's state, as returned
206 * by kernel
207 */
6e869df7 208
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209enum kmod_module_initstate {
210 KMOD_MODULE_BUILTIN = 0,
211 KMOD_MODULE_LIVE,
212 KMOD_MODULE_COMING,
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213 KMOD_MODULE_GOING,
214 /* Padding to make sure enum is not mapped to char */
867da6fc 215 _KMOD_MODULE_PAD = 1U << 31,
f12ae3c4 216};
6a829211 217const char *kmod_module_initstate_str(enum kmod_module_initstate state);
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218int kmod_module_get_initstate(const struct kmod_module *mod);
219int kmod_module_get_refcnt(const struct kmod_module *mod);
220struct kmod_list *kmod_module_get_holders(const struct kmod_module *mod);
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221struct kmod_list *kmod_module_get_sections(const struct kmod_module *mod);
222const char *kmod_module_section_get_name(const struct kmod_list *entry);
223unsigned long kmod_module_section_get_address(const struct kmod_list *entry);
224void kmod_module_section_free_list(struct kmod_list *list);
69f9dd43 225long kmod_module_get_size(const struct kmod_module *mod);
f12ae3c4 226
bd3f5535 227
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228
229/*
230 * Information retrieved from ELF headers and sections
231 */
1c522600 232
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233int kmod_module_get_info(const struct kmod_module *mod, struct kmod_list **list);
234const char *kmod_module_info_get_key(const struct kmod_list *entry);
235const char *kmod_module_info_get_value(const struct kmod_list *entry);
236void kmod_module_info_free_list(struct kmod_list *list);
237
238int kmod_module_get_versions(const struct kmod_module *mod, struct kmod_list **list);
239const char *kmod_module_version_get_symbol(const struct kmod_list *entry);
240uint64_t kmod_module_version_get_crc(const struct kmod_list *entry);
241void kmod_module_versions_free_list(struct kmod_list *list);
242
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243int kmod_module_get_symbols(const struct kmod_module *mod, struct kmod_list **list);
244const char *kmod_module_symbol_get_symbol(const struct kmod_list *entry);
245uint64_t kmod_module_symbol_get_crc(const struct kmod_list *entry);
246void kmod_module_symbols_free_list(struct kmod_list *list);
247
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248enum kmod_symbol_bind {
249 KMOD_SYMBOL_NONE = '\0',
250 KMOD_SYMBOL_LOCAL = 'L',
251 KMOD_SYMBOL_GLOBAL = 'G',
252 KMOD_SYMBOL_WEAK = 'W',
253 KMOD_SYMBOL_UNDEF = 'U'
254};
255
256int kmod_module_get_dependency_symbols(const struct kmod_module *mod, struct kmod_list **list);
257const char *kmod_module_dependency_symbol_get_symbol(const struct kmod_list *entry);
258int kmod_module_dependency_symbol_get_bind(const struct kmod_list *entry);
259uint64_t kmod_module_dependency_symbol_get_crc(const struct kmod_list *entry);
260void kmod_module_dependency_symbols_free_list(struct kmod_list *list);
261
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262#ifdef __cplusplus
263} /* extern "C" */
264#endif
586fc304 265#endif