1 | /*
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2 | * Common modutils related functions for busybox
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3 | *
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4 | * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi>
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5 | *
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6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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7 | */
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8 |
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9 | #ifndef MODUTILS_H
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10 | #define MODUTILS_H 1
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11 |
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12 | #include "libbb.h"
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13 |
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14 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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15 |
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16 | /* linux/include/linux/module.h has 64, but this is also used
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17 | * internally for the maximum alias name length, which can be quite long */
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18 | #define MODULE_NAME_LEN 256
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19 | #define MODULE_HASH_SIZE 256
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20 |
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21 | typedef struct module_entry {
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22 | struct module_entry *next;
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23 | char *name, *modname;
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24 | llist_t *deps;
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25 | IF_MODPROBE(
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26 | llist_t *realnames;
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27 | unsigned flags;
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28 | const char *probed_name; /* verbatim as seen on cmdline */
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29 | char *options; /* options from config files */
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30 | )
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31 | IF_DEPMOD(
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32 | llist_t *aliases;
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33 | llist_t *symbols;
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34 | struct module_entry *dnext, *dprev;
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35 | )
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36 | } module_entry;
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37 |
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38 | typedef struct module_db {
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39 | module_entry *buckets[MODULE_HASH_SIZE];
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40 | } module_db;
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41 |
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42 | #define moddb_foreach_module(db, module, index) \
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43 | for ((index) = 0; (index) < MODULE_HASH_SIZE; (index)++) \
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44 | for (module = (db)->buckets[index]; module; module = module->next)
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45 |
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46 | module_entry *moddb_get(module_db *db, const char *s) FAST_FUNC;
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47 | module_entry *moddb_get_or_create(module_db *db, const char *s) FAST_FUNC;
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48 | void moddb_free(module_db *db) FAST_FUNC;
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49 |
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50 | void replace(char *s, char what, char with) FAST_FUNC;
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51 | char *replace_underscores(char *s) FAST_FUNC;
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52 | int string_to_llist(char *string, llist_t **llist, const char *delim) FAST_FUNC;
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53 | char *filename2modname(const char *filename, char *modname) FAST_FUNC;
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54 | char *parse_cmdline_module_options(char **argv, int quote_spaces) FAST_FUNC;
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55 |
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56 | /* insmod for 2.4 and modprobe's options (insmod 2.6 has no options at all): */
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57 | #define INSMOD_OPTS \
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58 | "vqs" \
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59 | IF_FEATURE_2_4_MODULES("Lfkx" IF_FEATURE_INSMOD_LOAD_MAP("m"))
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60 | #define INSMOD_ARGS /* (was meant to support -o NAME) , NULL */
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61 |
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62 | enum {
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63 | INSMOD_OPT_VERBOSE = (1 << 0),
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64 | INSMOD_OPT_SILENT = (1 << 1),
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65 | INSMOD_OPT_SYSLOG = (1 << 2),
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66 | //INSMOD_OPT_OUTPUTNAME = (1 << x) - not supported yet
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67 | INSMOD_OPT_LOCK = (1 << 3) * ENABLE_FEATURE_2_4_MODULES,
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68 | INSMOD_OPT_FORCE = (1 << 4) * ENABLE_FEATURE_2_4_MODULES,
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69 | INSMOD_OPT_KERNELD = (1 << 5) * ENABLE_FEATURE_2_4_MODULES,
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70 | INSMOD_OPT_NO_EXPORT = (1 << 6) * ENABLE_FEATURE_2_4_MODULES,
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71 | INSMOD_OPT_PRINT_MAP = (1 << 7) * ENABLE_FEATURE_INSMOD_LOAD_MAP,
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72 | INSMOD_OPT_UNUSED =
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73 | (INSMOD_OPT_PRINT_MAP ? INSMOD_OPT_PRINT_MAP
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74 | : INSMOD_OPT_NO_EXPORT ? INSMOD_OPT_NO_EXPORT
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75 | : INSMOD_OPT_SYSLOG
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76 | ) << 1
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77 | };
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78 |
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79 | #if ENABLE_FEATURE_INSMOD_TRY_MMAP
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80 | void* FAST_FUNC try_to_mmap_module(const char *filename, size_t *image_size_p);
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81 | #else
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82 | # define try_to_mmap_module(filename, image_size) NULL
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83 | #endif
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84 |
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85 | /* Return:
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86 | * 0 on success,
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87 | * -errno on open/read error,
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88 | * errno on init_module() error
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89 | */
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90 | int FAST_FUNC bb_init_module(const char *module, const char *options);
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91 | /* Return:
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92 | * 0 on success,
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93 | * errno on init_module() error
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94 | */
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95 | int FAST_FUNC bb_delete_module(const char *module, unsigned int flags);
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96 | /* Translates error return to a string */
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97 | const char *moderror(int err) FAST_FUNC;
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98 |
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99 | #if ENABLE_FEATURE_2_4_MODULES
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100 | int FAST_FUNC bb_init_module_24(const char *module, const char *options);
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101 | #endif
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102 |
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103 | POP_SAVED_FUNCTION_VISIBILITY
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104 |
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105 | #endif
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