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/*
* libkmod - interface to kernel module operations
*
* Copyright (C) 2011-2013 ProFUSION embedded systems
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef _LIBKMOD_H_
#define _LIBKMOD_H_
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* kmod_ctx
*
* library user context - reads the config and system
* environment, user variables, allows custom logging
*/
struct kmod_ctx;
struct kmod_ctx *kmod_new(const char *dirname, const char * const *config_paths);
struct kmod_ctx *kmod_ref(struct kmod_ctx *ctx);
struct kmod_ctx *kmod_unref(struct kmod_ctx *ctx);
void kmod_set_log_fn(struct kmod_ctx *ctx,
void (*log_fn)(void *log_data,
int priority, const char *file, int line,
const char *fn, const char *format,
va_list args),
const void *data);
int kmod_get_log_priority(const struct kmod_ctx *ctx);
void kmod_set_log_priority(struct kmod_ctx *ctx, int priority);
void *kmod_get_userdata(const struct kmod_ctx *ctx);
void kmod_set_userdata(struct kmod_ctx *ctx, const void *userdata);
const char *kmod_get_dirname(const struct kmod_ctx *ctx);
/*
* Management of libkmod's resources
*/
int kmod_load_resources(struct kmod_ctx *ctx);
void kmod_unload_resources(struct kmod_ctx *ctx);
enum kmod_resources {
KMOD_RESOURCES_OK = 0,
KMOD_RESOURCES_MUST_RELOAD = 1,
KMOD_RESOURCES_MUST_RECREATE = 2,
};
int kmod_validate_resources(struct kmod_ctx *ctx);
enum kmod_index {
KMOD_INDEX_MODULES_DEP = 0,
KMOD_INDEX_MODULES_ALIAS,
KMOD_INDEX_MODULES_SYMBOL,
KMOD_INDEX_MODULES_BUILTIN_ALIAS,
KMOD_INDEX_MODULES_BUILTIN,
/* Padding to make sure enum is not mapped to char */
_KMOD_INDEX_PAD = 1U << 31,
};
int kmod_dump_index(struct kmod_ctx *ctx, enum kmod_index type, int fd);
/*
* kmod_list
*
* access to kmod generated lists
*/
struct kmod_list;
struct kmod_list *kmod_list_next(const struct kmod_list *list,
const struct kmod_list *curr);
struct kmod_list *kmod_list_prev(const struct kmod_list *list,
const struct kmod_list *curr);
struct kmod_list *kmod_list_last(const struct kmod_list *list);
#define kmod_list_foreach(list_entry, first_entry) \
for (list_entry = first_entry; \
list_entry != NULL; \
list_entry = kmod_list_next(first_entry, list_entry))
#define kmod_list_foreach_reverse(list_entry, first_entry) \
for (list_entry = kmod_list_last(first_entry); \
list_entry != NULL; \
list_entry = kmod_list_prev(first_entry, list_entry))
/*
* kmod_config_iter
*
* access to configuration lists - it allows to get each configuration's
* key/value stored by kmod
*/
struct kmod_config_iter;
struct kmod_config_iter *kmod_config_get_blacklists(const struct kmod_ctx *ctx);
struct kmod_config_iter *kmod_config_get_install_commands(const struct kmod_ctx *ctx);
struct kmod_config_iter *kmod_config_get_remove_commands(const struct kmod_ctx *ctx);
struct kmod_config_iter *kmod_config_get_aliases(const struct kmod_ctx *ctx);
struct kmod_config_iter *kmod_config_get_options(const struct kmod_ctx *ctx);
struct kmod_config_iter *kmod_config_get_softdeps(const struct kmod_ctx *ctx);
struct kmod_config_iter *kmod_config_get_weakdeps(const struct kmod_ctx *ctx);
const char *kmod_config_iter_get_key(const struct kmod_config_iter *iter);
const char *kmod_config_iter_get_value(const struct kmod_config_iter *iter);
bool kmod_config_iter_next(struct kmod_config_iter *iter);
void kmod_config_iter_free_iter(struct kmod_config_iter *iter);
/*
* kmod_module
*
* Operate on kernel modules
*/
struct kmod_module;
int kmod_module_new_from_name(struct kmod_ctx *ctx, const char *name,
struct kmod_module **mod);
int kmod_module_new_from_path(struct kmod_ctx *ctx, const char *path,
struct kmod_module **mod);
int kmod_module_new_from_lookup(struct kmod_ctx *ctx, const char *given_alias,
struct kmod_list **list);
int kmod_module_new_from_name_lookup(struct kmod_ctx *ctx,
const char *modname,
struct kmod_module **mod);
int kmod_module_new_from_loaded(struct kmod_ctx *ctx,
struct kmod_list **list);
struct kmod_module *kmod_module_ref(struct kmod_module *mod);
struct kmod_module *kmod_module_unref(struct kmod_module *mod);
int kmod_module_unref_list(struct kmod_list *list);
struct kmod_module *kmod_module_get_module(const struct kmod_list *entry);
/* Removal flags */
enum kmod_remove {
KMOD_REMOVE_FORCE = O_TRUNC,
KMOD_REMOVE_NOWAIT = O_NONBLOCK, /* always set */
/* libkmod-only defines, not passed to kernel */
KMOD_REMOVE_NOLOG = 1,
};
/* Insertion flags */
enum kmod_insert {
KMOD_INSERT_FORCE_VERMAGIC = 0x1,
KMOD_INSERT_FORCE_MODVERSION = 0x2,
};
/* Flags to kmod_module_probe_insert_module() */
enum kmod_probe {
KMOD_PROBE_FORCE_VERMAGIC = 0x00001,
KMOD_PROBE_FORCE_MODVERSION = 0x00002,
KMOD_PROBE_IGNORE_COMMAND = 0x00004,
KMOD_PROBE_IGNORE_LOADED = 0x00008,
KMOD_PROBE_DRY_RUN = 0x00010,
KMOD_PROBE_FAIL_ON_LOADED = 0x00020,
/* codes below can be used in return value, too */
KMOD_PROBE_APPLY_BLACKLIST_ALL = 0x10000,
KMOD_PROBE_APPLY_BLACKLIST = 0x20000,
KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY = 0x40000,
};
/* Flags to kmod_module_apply_filter() */
enum kmod_filter {
KMOD_FILTER_BLACKLIST = 0x00001,
KMOD_FILTER_BUILTIN = 0x00002,
};
int kmod_module_remove_module(struct kmod_module *mod, unsigned int flags);
int kmod_module_insert_module(struct kmod_module *mod, unsigned int flags,
const char *options);
int kmod_module_probe_insert_module(struct kmod_module *mod,
unsigned int flags, const char *extra_options,
int (*run_install)(struct kmod_module *m,
const char *cmdline, void *data),
const void *data,
void (*print_action)(struct kmod_module *m, bool install,
const char *options));
const char *kmod_module_get_name(const struct kmod_module *mod);
const char *kmod_module_get_path(const struct kmod_module *mod);
const char *kmod_module_get_options(const struct kmod_module *mod);
const char *kmod_module_get_install_commands(const struct kmod_module *mod);
const char *kmod_module_get_remove_commands(const struct kmod_module *mod);
struct kmod_list *kmod_module_get_dependencies(const struct kmod_module *mod);
int kmod_module_get_softdeps(const struct kmod_module *mod,
struct kmod_list **pre, struct kmod_list **post);
int kmod_module_get_weakdeps(const struct kmod_module *mod,
struct kmod_list **weak);
int kmod_module_get_filtered_blacklist(const struct kmod_ctx *ctx,
const struct kmod_list *input,
struct kmod_list **output) __attribute__ ((deprecated));
int kmod_module_apply_filter(const struct kmod_ctx *ctx,
enum kmod_filter filter_type,
const struct kmod_list *input,
struct kmod_list **output);
/*
* Information regarding "live information" from module's state, as returned
* by kernel
*/
enum kmod_module_initstate {
KMOD_MODULE_BUILTIN = 0,
KMOD_MODULE_LIVE,
KMOD_MODULE_COMING,
KMOD_MODULE_GOING,
/* Padding to make sure enum is not mapped to char */
_KMOD_MODULE_PAD = 1U << 31,
};
const char *kmod_module_initstate_str(enum kmod_module_initstate state);
int kmod_module_get_initstate(const struct kmod_module *mod);
int kmod_module_get_refcnt(const struct kmod_module *mod);
struct kmod_list *kmod_module_get_holders(const struct kmod_module *mod);
struct kmod_list *kmod_module_get_sections(const struct kmod_module *mod);
const char *kmod_module_section_get_name(const struct kmod_list *entry);
unsigned long kmod_module_section_get_address(const struct kmod_list *entry);
void kmod_module_section_free_list(struct kmod_list *list);
long kmod_module_get_size(const struct kmod_module *mod);
/*
* Information retrieved from ELF headers and sections
*/
int kmod_module_get_info(const struct kmod_module *mod, struct kmod_list **list);
const char *kmod_module_info_get_key(const struct kmod_list *entry);
const char *kmod_module_info_get_value(const struct kmod_list *entry);
void kmod_module_info_free_list(struct kmod_list *list);
int kmod_module_get_versions(const struct kmod_module *mod, struct kmod_list **list);
const char *kmod_module_version_get_symbol(const struct kmod_list *entry);
uint64_t kmod_module_version_get_crc(const struct kmod_list *entry);
void kmod_module_versions_free_list(struct kmod_list *list);
int kmod_module_get_symbols(const struct kmod_module *mod, struct kmod_list **list);
const char *kmod_module_symbol_get_symbol(const struct kmod_list *entry);
uint64_t kmod_module_symbol_get_crc(const struct kmod_list *entry);
void kmod_module_symbols_free_list(struct kmod_list *list);
enum kmod_symbol_bind {
KMOD_SYMBOL_NONE = '\0',
KMOD_SYMBOL_LOCAL = 'L',
KMOD_SYMBOL_GLOBAL = 'G',
KMOD_SYMBOL_WEAK = 'W',
KMOD_SYMBOL_UNDEF = 'U'
};
int kmod_module_get_dependency_symbols(const struct kmod_module *mod, struct kmod_list **list);
const char *kmod_module_dependency_symbol_get_symbol(const struct kmod_list *entry);
int kmod_module_dependency_symbol_get_bind(const struct kmod_list *entry);
uint64_t kmod_module_dependency_symbol_get_crc(const struct kmod_list *entry);
void kmod_module_dependency_symbols_free_list(struct kmod_list *list);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif
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