[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Modprobe written from scratch for BusyBox
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| 4 | *
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| 5 | * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
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| 6 | * Copyright (c) 2008 Vladimir Dronnikov
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| 7 | *
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| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 9 | */
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| 10 |
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| 11 | //applet:IF_MODPROBE(APPLET(modprobe, _BB_DIR_SBIN, _BB_SUID_DROP))
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| 12 |
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| 13 | //usage:#if !ENABLE_MODPROBE_SMALL
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| 14 | //usage:#define modprobe_notes_usage
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| 15 | //usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
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| 16 | //usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
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| 17 | //usage: "pass each module it loads.\n"
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| 18 | //usage: "\n"
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| 19 | //usage: "The configuration file is searched (in this order):\n"
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| 20 | //usage: "\n"
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| 21 | //usage: " /etc/modprobe.conf (2.6 only)\n"
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| 22 | //usage: " /etc/modules.conf\n"
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| 23 | //usage: " /etc/conf.modules (deprecated)\n"
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| 24 | //usage: "\n"
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| 25 | //usage: "They all have the same syntax (see below). If none is present, it is\n"
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| 26 | //usage: "_not_ an error; each loaded module is then expected to load without\n"
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| 27 | //usage: "options. Once a file is found, the others are tested for.\n"
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| 28 | //usage: "\n"
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| 29 | //usage: "/etc/modules.conf entry format:\n"
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| 30 | //usage: "\n"
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| 31 | //usage: " alias <alias_name> <mod_name>\n"
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| 32 | //usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
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| 33 | //usage: " It makes sense if your mod_name is long, or you want a more representative\n"
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| 34 | //usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
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| 35 | //usage: " This makes it also possible to use a different set of options (below) for\n"
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| 36 | //usage: " the module and the alias.\n"
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| 37 | //usage: " A module can be aliased more than once.\n"
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| 38 | //usage: "\n"
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| 39 | //usage: " options <mod_name|alias_name> <symbol=value...>\n"
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| 40 | //usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
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| 41 | //usage: " the \"symbol=value\" pairs as option to that module.\n"
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| 42 | //usage: "\n"
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| 43 | //usage: "Sample /etc/modules.conf file:\n"
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| 44 | //usage: "\n"
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| 45 | //usage: " options tulip irq=3\n"
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| 46 | //usage: " alias tulip tulip2\n"
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| 47 | //usage: " options tulip2 irq=4 io=0x308\n"
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| 48 | //usage: "\n"
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| 49 | //usage: "Other functionality offered by 'classic' modprobe is not available in\n"
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| 50 | //usage: "this implementation.\n"
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| 51 | //usage: "\n"
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| 52 | //usage: "If module options are present both in the config file, and on the command line,\n"
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| 53 | //usage: "then the options from the command line will be passed to the module _after_\n"
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| 54 | //usage: "the options from the config file. That way, you can have defaults in the config\n"
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| 55 | //usage: "file, and override them for a specific usage from the command line.\n"
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| 56 | //usage:#define modprobe_example_usage
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| 57 | //usage: "(with the above /etc/modules.conf):\n\n"
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| 58 | //usage: "$ modprobe tulip\n"
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| 59 | //usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
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| 60 | //usage: "$ modprobe tulip irq=5\n"
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| 61 | //usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
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| 62 | //usage: "$ modprobe tulip2\n"
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| 63 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
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| 64 | //usage: " which are the default for alias 'tulip2'\n\n"
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| 65 | //usage: "$ modprobe tulip2 irq=8\n"
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| 66 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
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| 67 | //usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
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| 68 | //usage: " from the command line\n\n"
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| 69 | //usage: "$ modprobe tulip2 irq=2 io=0x210\n"
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| 70 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
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| 71 | //usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
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| 72 | //usage: " from the command line\n"
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| 73 | //usage:
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| 74 | //usage:#define modprobe_trivial_usage
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| 75 | //usage: "[-alrqvs"
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| 76 | //usage: IF_FEATURE_MODPROBE_BLACKLIST("b")
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| 77 | //usage: "] MODULE [symbol=value]..."
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| 78 | //usage:#define modprobe_full_usage "\n\n"
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| 79 | //usage: "Options:"
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| 80 | //usage: "\n -a Load multiple MODULEs"
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| 81 | //usage: "\n -l List (MODULE is a pattern)"
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| 82 | //usage: "\n -r Remove MODULE (stacks) or do autoclean"
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| 83 | //usage: "\n -q Quiet"
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| 84 | //usage: "\n -v Verbose"
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| 85 | //usage: "\n -s Log to syslog"
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| 86 | //usage: IF_FEATURE_MODPROBE_BLACKLIST(
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| 87 | //usage: "\n -b Apply blacklist to module names too"
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| 88 | //usage: )
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| 89 | //usage:#endif /* !ENABLE_MODPROBE_SMALL */
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| 90 |
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| 91 | #include "libbb.h"
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| 92 | #include "modutils.h"
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| 93 | #include <sys/utsname.h>
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| 94 | #include <fnmatch.h>
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| 95 |
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| 96 | //#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
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| 97 | #define DBG(...) ((void)0)
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| 98 |
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| 99 | /* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
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| 100 | * we expect the full dependency list to be specified in modules.dep.
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| 101 | * Older versions would only export the direct dependency list.
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| 102 | */
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| 103 |
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| 104 | /* Note that usage text doesn't document various 2.4 options
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| 105 | * we pull in through INSMOD_OPTS define */
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| 106 |
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| 107 | #define MODPROBE_COMPLEMENTARY "q-v:v-q:l--ar:a--lr:r--al"
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| 108 | #define MODPROBE_OPTS "alr" IF_FEATURE_MODPROBE_BLACKLIST("b")
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| 109 | //#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
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| 110 | //#define MODPROBE_OPTS "acd:lnrt:C:" IF_FEATURE_MODPROBE_BLACKLIST("b")
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| 111 | enum {
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| 112 | MODPROBE_OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
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| 113 | //MODPROBE_OPT_DUMP_ONLY= (INSMOD_OPT_UNUSED << x), /* c */
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| 114 | //MODPROBE_OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
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| 115 | MODPROBE_OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
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| 116 | //MODPROBE_OPT_SHOW_ONLY= (INSMOD_OPT_UNUSED << x), /* n */
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| 117 | MODPROBE_OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
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| 118 | //MODPROBE_OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
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| 119 | //MODPROBE_OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
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| 120 | //MODPROBE_OPT_CONFIGFILE=(INSMOD_OPT_UNUSED << x), /* C */
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| 121 | MODPROBE_OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 3) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
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| 122 | };
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| 123 |
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| 124 | #define MODULE_FLAG_LOADED 0x0001
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| 125 | #define MODULE_FLAG_NEED_DEPS 0x0002
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| 126 | /* "was seen in modules.dep": */
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| 127 | #define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
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| 128 | #define MODULE_FLAG_BLACKLISTED 0x0008
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| 129 |
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| 130 | struct module_entry { /* I'll call it ME. */
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| 131 | unsigned flags;
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| 132 | char *modname; /* stripped of /path/, .ext and s/-/_/g */
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| 133 | const char *probed_name; /* verbatim as seen on cmdline */
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| 134 | char *options; /* options from config files */
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| 135 | llist_t *realnames; /* strings. if this module is an alias, */
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| 136 | /* real module name is one of these. */
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| 137 | //Can there really be more than one? Example from real kernel?
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| 138 | llist_t *deps; /* strings. modules we depend on */
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| 139 | };
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| 140 |
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| 141 | struct globals {
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| 142 | llist_t *db; /* MEs of all modules ever seen (caching for speed) */
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| 143 | llist_t *probes; /* MEs of module(s) requested on cmdline */
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| 144 | char *cmdline_mopts; /* module options from cmdline */
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| 145 | int num_unresolved_deps;
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| 146 | /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
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| 147 | smallint need_symbols;
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| 148 | } FIX_ALIASING;
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| 149 | #define G (*(struct globals*)&bb_common_bufsiz1)
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| 150 | #define INIT_G() do { } while (0)
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| 151 |
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| 152 |
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| 153 | static int read_config(const char *path);
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| 154 |
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| 155 | static char *gather_options_str(char *opts, const char *append)
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| 156 | {
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| 157 | /* Speed-optimized. We call gather_options_str many times. */
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| 158 | if (append) {
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| 159 | if (opts == NULL) {
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| 160 | opts = xstrdup(append);
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| 161 | } else {
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| 162 | int optlen = strlen(opts);
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| 163 | opts = xrealloc(opts, optlen + strlen(append) + 2);
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| 164 | sprintf(opts + optlen, " %s", append);
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| 165 | }
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| 166 | }
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| 167 | return opts;
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| 168 | }
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| 169 |
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| 170 | static struct module_entry *helper_get_module(const char *module, int create)
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| 171 | {
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| 172 | char modname[MODULE_NAME_LEN];
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| 173 | struct module_entry *e;
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| 174 | llist_t *l;
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| 175 |
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| 176 | filename2modname(module, modname);
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| 177 | for (l = G.db; l != NULL; l = l->link) {
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| 178 | e = (struct module_entry *) l->data;
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| 179 | if (strcmp(e->modname, modname) == 0)
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| 180 | return e;
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| 181 | }
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| 182 | if (!create)
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| 183 | return NULL;
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| 184 |
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| 185 | e = xzalloc(sizeof(*e));
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| 186 | e->modname = xstrdup(modname);
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| 187 | llist_add_to(&G.db, e);
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| 188 |
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| 189 | return e;
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| 190 | }
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| 191 | static struct module_entry *get_or_add_modentry(const char *module)
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| 192 | {
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| 193 | return helper_get_module(module, 1);
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| 194 | }
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| 195 | static struct module_entry *get_modentry(const char *module)
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| 196 | {
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| 197 | return helper_get_module(module, 0);
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| 198 | }
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| 199 |
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| 200 | static void add_probe(const char *name)
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| 201 | {
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| 202 | struct module_entry *m;
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| 203 |
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| 204 | m = get_or_add_modentry(name);
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| 205 | if (!(option_mask32 & MODPROBE_OPT_REMOVE)
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| 206 | && (m->flags & MODULE_FLAG_LOADED)
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| 207 | ) {
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| 208 | DBG("skipping %s, it is already loaded", name);
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| 209 | return;
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| 210 | }
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| 211 |
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| 212 | DBG("queuing %s", name);
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| 213 | m->probed_name = name;
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| 214 | m->flags |= MODULE_FLAG_NEED_DEPS;
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| 215 | llist_add_to_end(&G.probes, m);
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| 216 | G.num_unresolved_deps++;
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| 217 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS
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| 218 | && strncmp(m->modname, "symbol:", 7) == 0
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| 219 | ) {
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| 220 | G.need_symbols = 1;
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| 221 | }
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| 222 | }
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| 223 |
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| 224 | static int FAST_FUNC config_file_action(const char *filename,
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| 225 | struct stat *statbuf UNUSED_PARAM,
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| 226 | void *userdata UNUSED_PARAM,
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| 227 | int depth UNUSED_PARAM)
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| 228 | {
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| 229 | char *tokens[3];
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| 230 | parser_t *p;
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| 231 | struct module_entry *m;
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| 232 | int rc = TRUE;
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| 233 |
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| 234 | if (bb_basename(filename)[0] == '.')
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| 235 | goto error;
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| 236 |
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| 237 | p = config_open2(filename, fopen_for_read);
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| 238 | if (p == NULL) {
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| 239 | rc = FALSE;
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| 240 | goto error;
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| 241 | }
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| 242 |
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| 243 | while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
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| 244 | //Use index_in_strings?
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| 245 | if (strcmp(tokens[0], "alias") == 0) {
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| 246 | /* alias <wildcard> <modulename> */
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| 247 | llist_t *l;
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| 248 | char wildcard[MODULE_NAME_LEN];
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| 249 | char *rmod;
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| 250 |
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| 251 | if (tokens[2] == NULL)
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| 252 | continue;
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| 253 | filename2modname(tokens[1], wildcard);
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| 254 |
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| 255 | for (l = G.probes; l != NULL; l = l->link) {
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| 256 | m = (struct module_entry *) l->data;
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| 257 | if (fnmatch(wildcard, m->modname, 0) != 0)
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| 258 | continue;
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| 259 | rmod = filename2modname(tokens[2], NULL);
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| 260 | llist_add_to(&m->realnames, rmod);
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| 261 |
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| 262 | if (m->flags & MODULE_FLAG_NEED_DEPS) {
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| 263 | m->flags &= ~MODULE_FLAG_NEED_DEPS;
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| 264 | G.num_unresolved_deps--;
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| 265 | }
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| 266 |
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| 267 | m = get_or_add_modentry(rmod);
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| 268 | if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
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| 269 | m->flags |= MODULE_FLAG_NEED_DEPS;
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| 270 | G.num_unresolved_deps++;
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| 271 | }
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| 272 | }
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| 273 | } else if (strcmp(tokens[0], "options") == 0) {
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| 274 | /* options <modulename> <option...> */
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| 275 | if (tokens[2] == NULL)
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| 276 | continue;
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| 277 | m = get_or_add_modentry(tokens[1]);
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| 278 | m->options = gather_options_str(m->options, tokens[2]);
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| 279 | } else if (strcmp(tokens[0], "include") == 0) {
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| 280 | /* include <filename> */
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| 281 | read_config(tokens[1]);
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| 282 | } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
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| 283 | && strcmp(tokens[0], "blacklist") == 0
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| 284 | ) {
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| 285 | /* blacklist <modulename> */
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| 286 | get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
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| 287 | }
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| 288 | }
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| 289 | config_close(p);
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| 290 | error:
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| 291 | return rc;
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| 292 | }
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| 293 |
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| 294 | static int read_config(const char *path)
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| 295 | {
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| 296 | return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
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| 297 | config_file_action, NULL, NULL, 1);
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| 298 | }
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| 299 |
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| 300 | static const char *humanly_readable_name(struct module_entry *m)
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| 301 | {
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| 302 | /* probed_name may be NULL. modname always exists. */
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| 303 | return m->probed_name ? m->probed_name : m->modname;
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| 304 | }
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| 305 |
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| 306 | static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
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| 307 | {
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| 308 | char *kcmdline_buf;
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| 309 | char *kcmdline;
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| 310 | char *kptr;
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| 311 | int len;
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| 312 |
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| 313 | kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
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| 314 | if (!kcmdline_buf)
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| 315 | return options;
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| 316 |
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| 317 | kcmdline = kcmdline_buf;
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| 318 | len = strlen(modulename);
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| 319 | while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
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| 320 | if (strncmp(modulename, kptr, len) != 0)
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| 321 | continue;
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| 322 | kptr += len;
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| 323 | if (*kptr != '.')
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| 324 | continue;
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| 325 | /* It is "modulename.xxxx" */
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| 326 | kptr++;
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| 327 | if (strchr(kptr, '=') != NULL) {
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| 328 | /* It is "modulename.opt=[val]" */
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| 329 | options = gather_options_str(options, kptr);
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| 330 | }
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| 331 | }
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| 332 | free(kcmdline_buf);
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| 333 |
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| 334 | return options;
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| 335 | }
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| 336 |
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| 337 | /* Return: similar to bb_init_module:
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| 338 | * 0 on success,
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| 339 | * -errno on open/read error,
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| 340 | * errno on init_module() error
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| 341 | */
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| 342 | /* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
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| 343 | * not deleted ones (those are still listed in modules.dep).
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| 344 | * module-init-tools version 3.4:
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| 345 | * # modprobe bogus
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| 346 | * FATAL: Module bogus not found. [exitcode 1]
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| 347 | * # modprobe -q bogus [silent, exitcode still 1]
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| 348 | * but:
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| 349 | * # rm kernel/drivers/net/dummy.ko
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| 350 | * # modprobe -q dummy
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| 351 | * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
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| 352 | * [exitcode 1]
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| 353 | */
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| 354 | static int do_modprobe(struct module_entry *m)
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| 355 | {
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| 356 | struct module_entry *m2 = m2; /* for compiler */
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| 357 | char *fn, *options;
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| 358 | int rc, first;
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| 359 | llist_t *l;
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| 360 |
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| 361 | if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
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| 362 | if (!(option_mask32 & INSMOD_OPT_SILENT))
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| 363 | bb_error_msg("module %s not found in modules.dep",
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| 364 | humanly_readable_name(m));
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| 365 | return -ENOENT;
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| 366 | }
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| 367 | DBG("do_modprob'ing %s", m->modname);
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| 368 |
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| 369 | if (!(option_mask32 & MODPROBE_OPT_REMOVE))
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| 370 | m->deps = llist_rev(m->deps);
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| 371 |
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| 372 | for (l = m->deps; l != NULL; l = l->link)
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| 373 | DBG("dep: %s", l->data);
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| 374 |
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| 375 | first = 1;
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| 376 | rc = 0;
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| 377 | while (m->deps) {
|
---|
| 378 | rc = 0;
|
---|
| 379 | fn = llist_pop(&m->deps); /* we leak it */
|
---|
| 380 | m2 = get_or_add_modentry(fn);
|
---|
| 381 |
|
---|
| 382 | if (option_mask32 & MODPROBE_OPT_REMOVE) {
|
---|
| 383 | /* modprobe -r */
|
---|
| 384 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
| 385 | rc = bb_delete_module(m2->modname, O_EXCL);
|
---|
| 386 | if (rc) {
|
---|
| 387 | if (first) {
|
---|
| 388 | bb_error_msg("can't unload module %s: %s",
|
---|
| 389 | humanly_readable_name(m2),
|
---|
| 390 | moderror(rc));
|
---|
| 391 | break;
|
---|
| 392 | }
|
---|
| 393 | } else {
|
---|
| 394 | m2->flags &= ~MODULE_FLAG_LOADED;
|
---|
| 395 | }
|
---|
| 396 | }
|
---|
| 397 | /* do not error out if *deps* fail to unload */
|
---|
| 398 | first = 0;
|
---|
| 399 | continue;
|
---|
| 400 | }
|
---|
| 401 |
|
---|
| 402 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
| 403 | DBG("%s is already loaded, skipping", fn);
|
---|
| 404 | continue;
|
---|
| 405 | }
|
---|
| 406 |
|
---|
| 407 | options = m2->options;
|
---|
| 408 | m2->options = NULL;
|
---|
| 409 | options = parse_and_add_kcmdline_module_options(options, m2->modname);
|
---|
| 410 | if (m == m2)
|
---|
| 411 | options = gather_options_str(options, G.cmdline_mopts);
|
---|
| 412 | rc = bb_init_module(fn, options);
|
---|
| 413 | DBG("loaded %s '%s', rc:%d", fn, options, rc);
|
---|
| 414 | if (rc == EEXIST)
|
---|
| 415 | rc = 0;
|
---|
| 416 | free(options);
|
---|
| 417 | if (rc) {
|
---|
| 418 | bb_error_msg("can't load module %s (%s): %s",
|
---|
| 419 | humanly_readable_name(m2),
|
---|
| 420 | fn,
|
---|
| 421 | moderror(rc)
|
---|
| 422 | );
|
---|
| 423 | break;
|
---|
| 424 | }
|
---|
| 425 | m2->flags |= MODULE_FLAG_LOADED;
|
---|
| 426 | }
|
---|
| 427 |
|
---|
| 428 | return rc;
|
---|
| 429 | }
|
---|
| 430 |
|
---|
| 431 | static void load_modules_dep(void)
|
---|
| 432 | {
|
---|
| 433 | struct module_entry *m;
|
---|
| 434 | char *colon, *tokens[2];
|
---|
| 435 | parser_t *p;
|
---|
| 436 |
|
---|
| 437 | /* Modprobe does not work at all without modules.dep,
|
---|
| 438 | * even if the full module name is given. Returning error here
|
---|
| 439 | * was making us later confuse user with this message:
|
---|
| 440 | * "module /full/path/to/existing/file/module.ko not found".
|
---|
| 441 | * It's better to die immediately, with good message.
|
---|
| 442 | * xfopen_for_read provides that. */
|
---|
| 443 | p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
| 444 |
|
---|
| 445 | while (G.num_unresolved_deps
|
---|
| 446 | && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
|
---|
| 447 | ) {
|
---|
| 448 | colon = last_char_is(tokens[0], ':');
|
---|
| 449 | if (colon == NULL)
|
---|
| 450 | continue;
|
---|
| 451 | *colon = 0;
|
---|
| 452 |
|
---|
| 453 | m = get_modentry(tokens[0]);
|
---|
| 454 | if (m == NULL)
|
---|
| 455 | continue;
|
---|
| 456 |
|
---|
| 457 | /* Optimization... */
|
---|
| 458 | if ((m->flags & MODULE_FLAG_LOADED)
|
---|
| 459 | && !(option_mask32 & MODPROBE_OPT_REMOVE)
|
---|
| 460 | ) {
|
---|
| 461 | DBG("skip deps of %s, it's already loaded", tokens[0]);
|
---|
| 462 | continue;
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
|
---|
| 466 | if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
|
---|
| 467 | G.num_unresolved_deps--;
|
---|
| 468 | llist_add_to(&m->deps, xstrdup(tokens[0]));
|
---|
| 469 | if (tokens[1])
|
---|
| 470 | string_to_llist(tokens[1], &m->deps, " \t");
|
---|
| 471 | } else
|
---|
| 472 | DBG("skipping dep line");
|
---|
| 473 | }
|
---|
| 474 | config_close(p);
|
---|
| 475 | }
|
---|
| 476 |
|
---|
| 477 | int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 478 | int modprobe_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 479 | {
|
---|
| 480 | struct utsname uts;
|
---|
| 481 | int rc;
|
---|
| 482 | unsigned opt;
|
---|
| 483 | struct module_entry *me;
|
---|
| 484 |
|
---|
| 485 | opt_complementary = MODPROBE_COMPLEMENTARY;
|
---|
| 486 | opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
|
---|
| 487 | argv += optind;
|
---|
| 488 |
|
---|
| 489 | /* Goto modules location */
|
---|
| 490 | xchdir(CONFIG_DEFAULT_MODULES_DIR);
|
---|
| 491 | uname(&uts);
|
---|
| 492 | xchdir(uts.release);
|
---|
| 493 |
|
---|
| 494 | if (opt & MODPROBE_OPT_LIST_ONLY) {
|
---|
| 495 | char name[MODULE_NAME_LEN];
|
---|
| 496 | char *colon, *tokens[2];
|
---|
| 497 | parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
| 498 |
|
---|
| 499 | while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
|
---|
| 500 | colon = last_char_is(tokens[0], ':');
|
---|
| 501 | if (!colon)
|
---|
| 502 | continue;
|
---|
| 503 | *colon = '\0';
|
---|
| 504 | filename2modname(tokens[0], name);
|
---|
| 505 | if (!argv[0])
|
---|
| 506 | puts(tokens[0]);
|
---|
| 507 | else {
|
---|
| 508 | int i;
|
---|
| 509 | for (i = 0; argv[i]; i++) {
|
---|
| 510 | if (fnmatch(argv[i], name, 0) == 0) {
|
---|
| 511 | puts(tokens[0]);
|
---|
| 512 | }
|
---|
| 513 | }
|
---|
| 514 | }
|
---|
| 515 | }
|
---|
| 516 | return EXIT_SUCCESS;
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | /* Yes, for some reason -l ignores -s... */
|
---|
| 520 | if (opt & INSMOD_OPT_SYSLOG)
|
---|
| 521 | logmode = LOGMODE_SYSLOG;
|
---|
| 522 |
|
---|
| 523 | if (!argv[0]) {
|
---|
| 524 | if (opt & MODPROBE_OPT_REMOVE) {
|
---|
| 525 | /* "modprobe -r" (w/o params).
|
---|
| 526 | * "If name is NULL, all unused modules marked
|
---|
| 527 | * autoclean will be removed".
|
---|
| 528 | */
|
---|
| 529 | if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
|
---|
| 530 | bb_perror_msg_and_die("rmmod");
|
---|
| 531 | }
|
---|
| 532 | return EXIT_SUCCESS;
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | /* Retrieve module names of already loaded modules */
|
---|
| 536 | {
|
---|
| 537 | char *s;
|
---|
| 538 | parser_t *parser = config_open2("/proc/modules", fopen_for_read);
|
---|
| 539 | while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
|
---|
| 540 | get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
|
---|
| 541 | config_close(parser);
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | if (opt & (MODPROBE_OPT_INSERT_ALL | MODPROBE_OPT_REMOVE)) {
|
---|
| 545 | /* Each argument is a module name */
|
---|
| 546 | do {
|
---|
| 547 | DBG("adding module %s", *argv);
|
---|
| 548 | add_probe(*argv++);
|
---|
| 549 | } while (*argv);
|
---|
| 550 | } else {
|
---|
| 551 | /* First argument is module name, rest are parameters */
|
---|
| 552 | DBG("probing just module %s", *argv);
|
---|
| 553 | add_probe(argv[0]);
|
---|
| 554 | G.cmdline_mopts = parse_cmdline_module_options(argv);
|
---|
| 555 | }
|
---|
| 556 |
|
---|
| 557 | /* Happens if all requested modules are already loaded */
|
---|
| 558 | if (G.probes == NULL)
|
---|
| 559 | return EXIT_SUCCESS;
|
---|
| 560 |
|
---|
| 561 | read_config("/etc/modprobe.conf");
|
---|
| 562 | read_config("/etc/modprobe.d");
|
---|
| 563 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
|
---|
| 564 | read_config("modules.symbols");
|
---|
| 565 | load_modules_dep();
|
---|
| 566 | if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
|
---|
| 567 | read_config("modules.alias");
|
---|
| 568 | load_modules_dep();
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | rc = 0;
|
---|
| 572 | while ((me = llist_pop(&G.probes)) != NULL) {
|
---|
| 573 | if (me->realnames == NULL) {
|
---|
| 574 | DBG("probing by module name");
|
---|
| 575 | /* This is not an alias. Literal names are blacklisted
|
---|
| 576 | * only if '-b' is given.
|
---|
| 577 | */
|
---|
| 578 | if (!(opt & MODPROBE_OPT_BLACKLIST)
|
---|
| 579 | || !(me->flags & MODULE_FLAG_BLACKLISTED)
|
---|
| 580 | ) {
|
---|
| 581 | rc |= do_modprobe(me);
|
---|
| 582 | }
|
---|
| 583 | continue;
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | /* Probe all real names for the alias */
|
---|
| 587 | do {
|
---|
| 588 | char *realname = llist_pop(&me->realnames);
|
---|
| 589 | struct module_entry *m2;
|
---|
| 590 |
|
---|
| 591 | DBG("probing alias %s by realname %s", me->modname, realname);
|
---|
| 592 | m2 = get_or_add_modentry(realname);
|
---|
| 593 | if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
|
---|
| 594 | && (!(m2->flags & MODULE_FLAG_LOADED)
|
---|
| 595 | || (opt & MODPROBE_OPT_REMOVE))
|
---|
| 596 | ) {
|
---|
| 597 | //TODO: we can pass "me" as 2nd param to do_modprobe,
|
---|
| 598 | //and make do_modprobe emit more meaningful error messages
|
---|
| 599 | //with alias name included, not just module name alias resolves to.
|
---|
| 600 | rc |= do_modprobe(m2);
|
---|
| 601 | }
|
---|
| 602 | free(realname);
|
---|
| 603 | } while (me->realnames != NULL);
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 | return (rc != 0);
|
---|
| 607 | }
|
---|