[821] | 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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[2725] | 5 | * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
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| 6 | * Copyright (c) 2008 Vladimir Dronnikov
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[821] | 7 | *
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[2725] | 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 9 | */
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[821] | 10 |
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[3232] | 11 | //applet:IF_MODPROBE(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
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[2725] | 12 |
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[3232] | 13 | #include "libbb.h"
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| 14 | #include "modutils.h"
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| 15 | #include <sys/utsname.h>
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| 16 | #include <fnmatch.h>
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| 17 |
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[3621] | 18 | #if 1
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[3232] | 19 | #define DBG(...) ((void)0)
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[3621] | 20 | #else
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| 21 | #define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
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| 22 | #endif
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[3232] | 23 |
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| 24 | /* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
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| 25 | * we expect the full dependency list to be specified in modules.dep.
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| 26 | * Older versions would only export the direct dependency list.
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| 27 | */
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| 28 |
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| 29 |
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[2725] | 30 | //usage:#if !ENABLE_MODPROBE_SMALL
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| 31 | //usage:#define modprobe_notes_usage
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| 32 | //usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
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| 33 | //usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
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| 34 | //usage: "pass each module it loads.\n"
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| 35 | //usage: "\n"
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| 36 | //usage: "The configuration file is searched (in this order):\n"
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| 37 | //usage: "\n"
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| 38 | //usage: " /etc/modprobe.conf (2.6 only)\n"
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| 39 | //usage: " /etc/modules.conf\n"
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| 40 | //usage: " /etc/conf.modules (deprecated)\n"
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| 41 | //usage: "\n"
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| 42 | //usage: "They all have the same syntax (see below). If none is present, it is\n"
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| 43 | //usage: "_not_ an error; each loaded module is then expected to load without\n"
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| 44 | //usage: "options. Once a file is found, the others are tested for.\n"
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| 45 | //usage: "\n"
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| 46 | //usage: "/etc/modules.conf entry format:\n"
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| 47 | //usage: "\n"
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| 48 | //usage: " alias <alias_name> <mod_name>\n"
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| 49 | //usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
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| 50 | //usage: " It makes sense if your mod_name is long, or you want a more representative\n"
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| 51 | //usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
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| 52 | //usage: " This makes it also possible to use a different set of options (below) for\n"
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| 53 | //usage: " the module and the alias.\n"
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| 54 | //usage: " A module can be aliased more than once.\n"
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| 55 | //usage: "\n"
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| 56 | //usage: " options <mod_name|alias_name> <symbol=value...>\n"
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| 57 | //usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
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| 58 | //usage: " the \"symbol=value\" pairs as option to that module.\n"
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| 59 | //usage: "\n"
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| 60 | //usage: "Sample /etc/modules.conf file:\n"
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| 61 | //usage: "\n"
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| 62 | //usage: " options tulip irq=3\n"
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| 63 | //usage: " alias tulip tulip2\n"
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| 64 | //usage: " options tulip2 irq=4 io=0x308\n"
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| 65 | //usage: "\n"
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| 66 | //usage: "Other functionality offered by 'classic' modprobe is not available in\n"
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| 67 | //usage: "this implementation.\n"
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| 68 | //usage: "\n"
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| 69 | //usage: "If module options are present both in the config file, and on the command line,\n"
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| 70 | //usage: "then the options from the command line will be passed to the module _after_\n"
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| 71 | //usage: "the options from the config file. That way, you can have defaults in the config\n"
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| 72 | //usage: "file, and override them for a specific usage from the command line.\n"
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| 73 | //usage:#define modprobe_example_usage
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| 74 | //usage: "(with the above /etc/modules.conf):\n\n"
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| 75 | //usage: "$ modprobe tulip\n"
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| 76 | //usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
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| 77 | //usage: "$ modprobe tulip irq=5\n"
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| 78 | //usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
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| 79 | //usage: "$ modprobe tulip2\n"
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| 80 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
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| 81 | //usage: " which are the default for alias 'tulip2'\n\n"
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| 82 | //usage: "$ modprobe tulip2 irq=8\n"
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| 83 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
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| 84 | //usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
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| 85 | //usage: " from the command line\n\n"
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| 86 | //usage: "$ modprobe tulip2 irq=2 io=0x210\n"
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| 87 | //usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
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| 88 | //usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
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| 89 | //usage: " from the command line\n"
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| 90 | //usage:
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| 91 | //usage:#define modprobe_trivial_usage
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[3232] | 92 | //usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
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[3621] | 93 | //usage: " MODULE [SYMBOL=VALUE]..."
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[2725] | 94 | //usage:#define modprobe_full_usage "\n\n"
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[3232] | 95 | //usage: " -a Load multiple MODULEs"
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[2725] | 96 | //usage: "\n -l List (MODULE is a pattern)"
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| 97 | //usage: "\n -r Remove MODULE (stacks) or do autoclean"
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| 98 | //usage: "\n -q Quiet"
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| 99 | //usage: "\n -v Verbose"
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| 100 | //usage: "\n -s Log to syslog"
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[3232] | 101 | //usage: "\n -D Show dependencies"
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[2725] | 102 | //usage: IF_FEATURE_MODPROBE_BLACKLIST(
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| 103 | //usage: "\n -b Apply blacklist to module names too"
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| 104 | //usage: )
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| 105 | //usage:#endif /* !ENABLE_MODPROBE_SMALL */
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| 106 |
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[3232] | 107 | /* Note: usage text doesn't document various 2.4 options
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| 108 | * we pull in through INSMOD_OPTS define
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| 109 | * Note2: -b is always accepted, but if !FEATURE_MODPROBE_BLACKLIST,
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| 110 | * it is a no-op.
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[2725] | 111 | */
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[3232] | 112 | #define MODPROBE_OPTS "alrDb"
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| 113 | /* -a and -D _are_ in fact compatible */
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| 114 | #define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
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| 115 | //#define MODPROBE_OPTS "acd:lnrt:C:b"
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[2725] | 116 | //#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
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| 117 | enum {
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[3232] | 118 | OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
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| 119 | //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
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| 120 | //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
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| 121 | OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
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| 122 | //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
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| 123 | OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
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| 124 | //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
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| 125 | //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
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| 126 | //OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << x), /* C */
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| 127 | OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << 3), /* D */
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| 128 | OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 4) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
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[821] | 129 | };
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[3232] | 130 | #if ENABLE_LONG_OPTS
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| 131 | static const char modprobe_longopts[] ALIGN1 =
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| 132 | /* nobody asked for long opts (yet) */
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| 133 | // "all\0" No_argument "a"
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| 134 | // "list\0" No_argument "l"
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| 135 | // "remove\0" No_argument "r"
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| 136 | // "quiet\0" No_argument "q"
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| 137 | // "verbose\0" No_argument "v"
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| 138 | // "syslog\0" No_argument "s"
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| 139 | /* module-init-tools 3.11.1 has only long opt --show-depends
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| 140 | * but no short -D, we provide long opt for scripts which
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| 141 | * were written for 3.11.1: */
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| 142 | "show-depends\0" No_argument "D"
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| 143 | // "use-blacklist\0" No_argument "b"
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| 144 | ;
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| 145 | #endif
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[821] | 146 |
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[2725] | 147 | #define MODULE_FLAG_LOADED 0x0001
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| 148 | #define MODULE_FLAG_NEED_DEPS 0x0002
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| 149 | /* "was seen in modules.dep": */
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| 150 | #define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
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| 151 | #define MODULE_FLAG_BLACKLISTED 0x0008
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[821] | 152 |
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[2725] | 153 | struct globals {
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| 154 | llist_t *probes; /* MEs of module(s) requested on cmdline */
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| 155 | char *cmdline_mopts; /* module options from cmdline */
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| 156 | int num_unresolved_deps;
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| 157 | /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
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| 158 | smallint need_symbols;
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[3232] | 159 | struct utsname uts;
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[3621] | 160 | module_db db;
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[2725] | 161 | } FIX_ALIASING;
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[3232] | 162 | #define G (*ptr_to_globals)
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| 163 | #define INIT_G() do { \
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[3621] | 164 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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[3232] | 165 | } while (0)
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[821] | 166 |
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| 167 |
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[2725] | 168 | static int read_config(const char *path);
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[821] | 169 |
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[2725] | 170 | static char *gather_options_str(char *opts, const char *append)
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[821] | 171 | {
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[2725] | 172 | /* Speed-optimized. We call gather_options_str many times. */
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| 173 | if (append) {
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| 174 | if (opts == NULL) {
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| 175 | opts = xstrdup(append);
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| 176 | } else {
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| 177 | int optlen = strlen(opts);
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| 178 | opts = xrealloc(opts, optlen + strlen(append) + 2);
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| 179 | sprintf(opts + optlen, " %s", append);
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| 180 | }
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| 181 | }
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| 182 | return opts;
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[821] | 183 | }
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| 184 |
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[3621] | 185 | static struct module_entry *get_or_add_modentry(const char *module)
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[821] | 186 | {
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[3621] | 187 | return moddb_get_or_create(&G.db, module);
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[821] | 188 | }
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| 189 |
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[2725] | 190 | static void add_probe(const char *name)
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[821] | 191 | {
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[2725] | 192 | struct module_entry *m;
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[821] | 193 |
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[2725] | 194 | m = get_or_add_modentry(name);
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[3232] | 195 | if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
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[2725] | 196 | && (m->flags & MODULE_FLAG_LOADED)
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| 197 | ) {
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| 198 | DBG("skipping %s, it is already loaded", name);
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| 199 | return;
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| 200 | }
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[821] | 201 |
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[2725] | 202 | DBG("queuing %s", name);
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| 203 | m->probed_name = name;
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| 204 | m->flags |= MODULE_FLAG_NEED_DEPS;
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| 205 | llist_add_to_end(&G.probes, m);
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| 206 | G.num_unresolved_deps++;
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| 207 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS
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[3621] | 208 | && is_prefixed_with(m->modname, "symbol:")
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[1765] | 209 | ) {
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[2725] | 210 | G.need_symbols = 1;
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[821] | 211 | }
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| 212 | }
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| 213 |
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[2725] | 214 | static int FAST_FUNC config_file_action(const char *filename,
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| 215 | struct stat *statbuf UNUSED_PARAM,
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| 216 | void *userdata UNUSED_PARAM,
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[3621] | 217 | int depth)
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[821] | 218 | {
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[2725] | 219 | char *tokens[3];
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| 220 | parser_t *p;
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| 221 | struct module_entry *m;
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| 222 | int rc = TRUE;
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[3621] | 223 | const char *base, *ext;
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[821] | 224 |
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[3621] | 225 | /* Skip files that begin with a "." */
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| 226 | base = bb_basename(filename);
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| 227 | if (base[0] == '.')
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[2725] | 228 | goto error;
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[821] | 229 |
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[3621] | 230 | /* In dir recursion, skip files that do not end with a ".conf"
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| 231 | * depth==0: read_config("modules.{symbols,alias}") must work,
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| 232 | * "include FILE_NOT_ENDING_IN_CONF" must work too.
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| 233 | */
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| 234 | if (depth != 0) {
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| 235 | ext = strrchr(base, '.');
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| 236 | if (ext == NULL || strcmp(ext + 1, "conf"))
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| 237 | goto error;
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| 238 | }
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| 239 |
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[2725] | 240 | p = config_open2(filename, fopen_for_read);
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| 241 | if (p == NULL) {
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| 242 | rc = FALSE;
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| 243 | goto error;
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| 244 | }
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[821] | 245 |
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[2725] | 246 | while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
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| 247 | //Use index_in_strings?
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| 248 | if (strcmp(tokens[0], "alias") == 0) {
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| 249 | /* alias <wildcard> <modulename> */
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| 250 | llist_t *l;
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| 251 | char wildcard[MODULE_NAME_LEN];
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| 252 | char *rmod;
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[821] | 253 |
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[2725] | 254 | if (tokens[2] == NULL)
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| 255 | continue;
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| 256 | filename2modname(tokens[1], wildcard);
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[821] | 257 |
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[3232] | 258 | for (l = G.probes; l; l = l->link) {
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[2725] | 259 | m = (struct module_entry *) l->data;
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| 260 | if (fnmatch(wildcard, m->modname, 0) != 0)
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| 261 | continue;
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| 262 | rmod = filename2modname(tokens[2], NULL);
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| 263 | llist_add_to(&m->realnames, rmod);
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[821] | 264 |
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[2725] | 265 | if (m->flags & MODULE_FLAG_NEED_DEPS) {
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| 266 | m->flags &= ~MODULE_FLAG_NEED_DEPS;
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| 267 | G.num_unresolved_deps--;
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[821] | 268 | }
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| 269 |
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[2725] | 270 | m = get_or_add_modentry(rmod);
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| 271 | if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
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| 272 | m->flags |= MODULE_FLAG_NEED_DEPS;
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| 273 | G.num_unresolved_deps++;
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[821] | 274 | }
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| 275 | }
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[2725] | 276 | } else if (strcmp(tokens[0], "options") == 0) {
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| 277 | /* options <modulename> <option...> */
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| 278 | if (tokens[2] == NULL)
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| 279 | continue;
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| 280 | m = get_or_add_modentry(tokens[1]);
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| 281 | m->options = gather_options_str(m->options, tokens[2]);
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| 282 | } else if (strcmp(tokens[0], "include") == 0) {
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[3621] | 283 | /* include <filename>/<dirname> (yes, directories also must work) */
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[2725] | 284 | read_config(tokens[1]);
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| 285 | } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
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| 286 | && strcmp(tokens[0], "blacklist") == 0
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| 287 | ) {
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| 288 | /* blacklist <modulename> */
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| 289 | get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
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[821] | 290 | }
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| 291 | }
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[2725] | 292 | config_close(p);
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| 293 | error:
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| 294 | return rc;
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[821] | 295 | }
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| 296 |
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[2725] | 297 | static int read_config(const char *path)
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[821] | 298 | {
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[2725] | 299 | return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
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[3621] | 300 | config_file_action, NULL, NULL,
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| 301 | /*depth:*/ 0);
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[2725] | 302 | }
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[821] | 303 |
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[2725] | 304 | static const char *humanly_readable_name(struct module_entry *m)
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| 305 | {
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| 306 | /* probed_name may be NULL. modname always exists. */
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| 307 | return m->probed_name ? m->probed_name : m->modname;
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| 308 | }
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[821] | 309 |
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[3621] | 310 | /* Like strsep(&stringp, "\n\t ") but quoted text goes to single token
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| 311 | * even if it contains whitespace.
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| 312 | */
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| 313 | static char *strsep_quotes(char **stringp)
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| 314 | {
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| 315 | char *s, *start = *stringp;
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| 316 |
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| 317 | if (!start)
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| 318 | return NULL;
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| 319 |
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| 320 | for (s = start; ; s++) {
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| 321 | switch (*s) {
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| 322 | case '"':
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| 323 | s = strchrnul(s + 1, '"'); /* find trailing quote */
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| 324 | if (*s != '\0')
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| 325 | s++; /* skip trailing quote */
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| 326 | /* fall through */
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| 327 | case '\0':
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| 328 | case '\n':
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| 329 | case '\t':
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| 330 | case ' ':
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| 331 | if (*s != '\0') {
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| 332 | *s = '\0';
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| 333 | *stringp = s + 1;
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| 334 | } else {
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| 335 | *stringp = NULL;
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| 336 | }
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| 337 | return start;
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| 338 | }
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| 339 | }
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| 340 | }
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| 341 |
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[2725] | 342 | static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
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| 343 | {
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| 344 | char *kcmdline_buf;
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| 345 | char *kcmdline;
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| 346 | char *kptr;
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[821] | 347 |
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[2725] | 348 | kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
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| 349 | if (!kcmdline_buf)
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| 350 | return options;
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[821] | 351 |
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[2725] | 352 | kcmdline = kcmdline_buf;
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[3621] | 353 | while ((kptr = strsep_quotes(&kcmdline)) != NULL) {
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| 354 | char *after_modulename = is_prefixed_with(kptr, modulename);
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| 355 | if (!after_modulename || *after_modulename != '.')
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[821] | 356 | continue;
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[2725] | 357 | /* It is "modulename.xxxx" */
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[3621] | 358 | kptr = after_modulename + 1;
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[2725] | 359 | if (strchr(kptr, '=') != NULL) {
|
---|
| 360 | /* It is "modulename.opt=[val]" */
|
---|
| 361 | options = gather_options_str(options, kptr);
|
---|
[821] | 362 | }
|
---|
| 363 | }
|
---|
[2725] | 364 | free(kcmdline_buf);
|
---|
[821] | 365 |
|
---|
[2725] | 366 | return options;
|
---|
[821] | 367 | }
|
---|
| 368 |
|
---|
[2725] | 369 | /* Return: similar to bb_init_module:
|
---|
| 370 | * 0 on success,
|
---|
| 371 | * -errno on open/read error,
|
---|
| 372 | * errno on init_module() error
|
---|
| 373 | */
|
---|
| 374 | /* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
|
---|
| 375 | * not deleted ones (those are still listed in modules.dep).
|
---|
| 376 | * module-init-tools version 3.4:
|
---|
| 377 | * # modprobe bogus
|
---|
| 378 | * FATAL: Module bogus not found. [exitcode 1]
|
---|
| 379 | * # modprobe -q bogus [silent, exitcode still 1]
|
---|
| 380 | * but:
|
---|
| 381 | * # rm kernel/drivers/net/dummy.ko
|
---|
| 382 | * # modprobe -q dummy
|
---|
| 383 | * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
|
---|
| 384 | * [exitcode 1]
|
---|
| 385 | */
|
---|
| 386 | static int do_modprobe(struct module_entry *m)
|
---|
[821] | 387 | {
|
---|
[2725] | 388 | int rc, first;
|
---|
[821] | 389 |
|
---|
[2725] | 390 | if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
|
---|
| 391 | if (!(option_mask32 & INSMOD_OPT_SILENT))
|
---|
| 392 | bb_error_msg("module %s not found in modules.dep",
|
---|
| 393 | humanly_readable_name(m));
|
---|
| 394 | return -ENOENT;
|
---|
| 395 | }
|
---|
| 396 | DBG("do_modprob'ing %s", m->modname);
|
---|
[821] | 397 |
|
---|
[3232] | 398 | if (!(option_mask32 & OPT_REMOVE))
|
---|
[2725] | 399 | m->deps = llist_rev(m->deps);
|
---|
[821] | 400 |
|
---|
[3232] | 401 | if (0) {
|
---|
| 402 | llist_t *l;
|
---|
| 403 | for (l = m->deps; l; l = l->link)
|
---|
| 404 | DBG("dep: %s", l->data);
|
---|
| 405 | }
|
---|
[821] | 406 |
|
---|
[2725] | 407 | first = 1;
|
---|
| 408 | rc = 0;
|
---|
| 409 | while (m->deps) {
|
---|
[3232] | 410 | struct module_entry *m2;
|
---|
| 411 | char *fn, *options;
|
---|
| 412 |
|
---|
[2725] | 413 | rc = 0;
|
---|
| 414 | fn = llist_pop(&m->deps); /* we leak it */
|
---|
[3621] | 415 | m2 = get_or_add_modentry(bb_get_last_path_component_nostrip(fn));
|
---|
[821] | 416 |
|
---|
[3232] | 417 | if (option_mask32 & OPT_REMOVE) {
|
---|
[2725] | 418 | /* modprobe -r */
|
---|
| 419 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
| 420 | rc = bb_delete_module(m2->modname, O_EXCL);
|
---|
| 421 | if (rc) {
|
---|
| 422 | if (first) {
|
---|
[3621] | 423 | bb_perror_msg("can't unload module '%s'",
|
---|
| 424 | humanly_readable_name(m2));
|
---|
[2725] | 425 | break;
|
---|
| 426 | }
|
---|
| 427 | } else {
|
---|
| 428 | m2->flags &= ~MODULE_FLAG_LOADED;
|
---|
[821] | 429 | }
|
---|
| 430 | }
|
---|
[2725] | 431 | /* do not error out if *deps* fail to unload */
|
---|
| 432 | first = 0;
|
---|
| 433 | continue;
|
---|
[821] | 434 | }
|
---|
| 435 |
|
---|
[3232] | 436 | options = m2->options;
|
---|
| 437 | m2->options = NULL;
|
---|
| 438 | options = parse_and_add_kcmdline_module_options(options, m2->modname);
|
---|
| 439 | if (m == m2)
|
---|
| 440 | options = gather_options_str(options, G.cmdline_mopts);
|
---|
| 441 |
|
---|
| 442 | if (option_mask32 & OPT_SHOW_DEPS) {
|
---|
| 443 | printf(options ? "insmod %s/%s/%s %s\n"
|
---|
| 444 | : "insmod %s/%s/%s\n",
|
---|
| 445 | CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
|
---|
| 446 | options);
|
---|
| 447 | free(options);
|
---|
| 448 | continue;
|
---|
| 449 | }
|
---|
| 450 |
|
---|
[2725] | 451 | if (m2->flags & MODULE_FLAG_LOADED) {
|
---|
| 452 | DBG("%s is already loaded, skipping", fn);
|
---|
[3232] | 453 | free(options);
|
---|
[2725] | 454 | continue;
|
---|
[821] | 455 | }
|
---|
| 456 |
|
---|
[2725] | 457 | rc = bb_init_module(fn, options);
|
---|
| 458 | DBG("loaded %s '%s', rc:%d", fn, options, rc);
|
---|
| 459 | if (rc == EEXIST)
|
---|
| 460 | rc = 0;
|
---|
| 461 | free(options);
|
---|
| 462 | if (rc) {
|
---|
| 463 | bb_error_msg("can't load module %s (%s): %s",
|
---|
| 464 | humanly_readable_name(m2),
|
---|
| 465 | fn,
|
---|
| 466 | moderror(rc)
|
---|
| 467 | );
|
---|
| 468 | break;
|
---|
[821] | 469 | }
|
---|
[2725] | 470 | m2->flags |= MODULE_FLAG_LOADED;
|
---|
[821] | 471 | }
|
---|
[2725] | 472 |
|
---|
| 473 | return rc;
|
---|
[821] | 474 | }
|
---|
| 475 |
|
---|
[2725] | 476 | static void load_modules_dep(void)
|
---|
[1765] | 477 | {
|
---|
[2725] | 478 | struct module_entry *m;
|
---|
| 479 | char *colon, *tokens[2];
|
---|
| 480 | parser_t *p;
|
---|
[1765] | 481 |
|
---|
[2725] | 482 | /* Modprobe does not work at all without modules.dep,
|
---|
| 483 | * even if the full module name is given. Returning error here
|
---|
| 484 | * was making us later confuse user with this message:
|
---|
| 485 | * "module /full/path/to/existing/file/module.ko not found".
|
---|
| 486 | * It's better to die immediately, with good message.
|
---|
| 487 | * xfopen_for_read provides that. */
|
---|
| 488 | p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
[1765] | 489 |
|
---|
[2725] | 490 | while (G.num_unresolved_deps
|
---|
| 491 | && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
|
---|
| 492 | ) {
|
---|
| 493 | colon = last_char_is(tokens[0], ':');
|
---|
| 494 | if (colon == NULL)
|
---|
| 495 | continue;
|
---|
[3621] | 496 | *colon = '\0';
|
---|
[1765] | 497 |
|
---|
[3621] | 498 | m = moddb_get(&G.db, bb_get_last_path_component_nostrip(tokens[0]));
|
---|
[2725] | 499 | if (m == NULL)
|
---|
| 500 | continue;
|
---|
[1765] | 501 |
|
---|
[2725] | 502 | /* Optimization... */
|
---|
| 503 | if ((m->flags & MODULE_FLAG_LOADED)
|
---|
[3232] | 504 | && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
|
---|
[2725] | 505 | ) {
|
---|
| 506 | DBG("skip deps of %s, it's already loaded", tokens[0]);
|
---|
| 507 | continue;
|
---|
[1765] | 508 | }
|
---|
| 509 |
|
---|
[2725] | 510 | m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
|
---|
| 511 | if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
|
---|
| 512 | G.num_unresolved_deps--;
|
---|
| 513 | llist_add_to(&m->deps, xstrdup(tokens[0]));
|
---|
| 514 | if (tokens[1])
|
---|
| 515 | string_to_llist(tokens[1], &m->deps, " \t");
|
---|
| 516 | } else
|
---|
| 517 | DBG("skipping dep line");
|
---|
[1765] | 518 | }
|
---|
[2725] | 519 | config_close(p);
|
---|
[1765] | 520 | }
|
---|
| 521 |
|
---|
[2725] | 522 | int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 523 | int modprobe_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 524 | {
|
---|
[2725] | 525 | int rc;
|
---|
| 526 | unsigned opt;
|
---|
| 527 | struct module_entry *me;
|
---|
[821] | 528 |
|
---|
[3232] | 529 | INIT_G();
|
---|
| 530 |
|
---|
| 531 | IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
|
---|
[2725] | 532 | opt_complementary = MODPROBE_COMPLEMENTARY;
|
---|
| 533 | opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
|
---|
| 534 | argv += optind;
|
---|
[821] | 535 |
|
---|
[2725] | 536 | /* Goto modules location */
|
---|
| 537 | xchdir(CONFIG_DEFAULT_MODULES_DIR);
|
---|
[3232] | 538 | uname(&G.uts);
|
---|
| 539 | xchdir(G.uts.release);
|
---|
[821] | 540 |
|
---|
[3232] | 541 | if (opt & OPT_LIST_ONLY) {
|
---|
| 542 | int i;
|
---|
[2725] | 543 | char *colon, *tokens[2];
|
---|
| 544 | parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
|
---|
[821] | 545 |
|
---|
[3232] | 546 | for (i = 0; argv[i]; i++)
|
---|
| 547 | replace(argv[i], '-', '_');
|
---|
| 548 |
|
---|
[2725] | 549 | while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
|
---|
| 550 | colon = last_char_is(tokens[0], ':');
|
---|
| 551 | if (!colon)
|
---|
| 552 | continue;
|
---|
| 553 | *colon = '\0';
|
---|
| 554 | if (!argv[0])
|
---|
| 555 | puts(tokens[0]);
|
---|
| 556 | else {
|
---|
[3621] | 557 | char name[MODULE_NAME_LEN];
|
---|
| 558 | filename2modname(
|
---|
| 559 | bb_get_last_path_component_nostrip(tokens[0]),
|
---|
| 560 | name
|
---|
| 561 | );
|
---|
[2725] | 562 | for (i = 0; argv[i]; i++) {
|
---|
| 563 | if (fnmatch(argv[i], name, 0) == 0) {
|
---|
| 564 | puts(tokens[0]);
|
---|
| 565 | }
|
---|
[821] | 566 | }
|
---|
| 567 | }
|
---|
| 568 | }
|
---|
[2725] | 569 | return EXIT_SUCCESS;
|
---|
[821] | 570 | }
|
---|
| 571 |
|
---|
[2725] | 572 | /* Yes, for some reason -l ignores -s... */
|
---|
| 573 | if (opt & INSMOD_OPT_SYSLOG)
|
---|
| 574 | logmode = LOGMODE_SYSLOG;
|
---|
[821] | 575 |
|
---|
[2725] | 576 | if (!argv[0]) {
|
---|
[3232] | 577 | if (opt & OPT_REMOVE) {
|
---|
[2725] | 578 | /* "modprobe -r" (w/o params).
|
---|
| 579 | * "If name is NULL, all unused modules marked
|
---|
| 580 | * autoclean will be removed".
|
---|
| 581 | */
|
---|
| 582 | if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
|
---|
[3621] | 583 | bb_perror_nomsg_and_die();
|
---|
[821] | 584 | }
|
---|
[2725] | 585 | return EXIT_SUCCESS;
|
---|
[821] | 586 | }
|
---|
| 587 |
|
---|
[2725] | 588 | /* Retrieve module names of already loaded modules */
|
---|
| 589 | {
|
---|
| 590 | char *s;
|
---|
| 591 | parser_t *parser = config_open2("/proc/modules", fopen_for_read);
|
---|
| 592 | while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
|
---|
| 593 | get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
|
---|
| 594 | config_close(parser);
|
---|
[821] | 595 | }
|
---|
| 596 |
|
---|
[3232] | 597 | if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
|
---|
[2725] | 598 | /* Each argument is a module name */
|
---|
| 599 | do {
|
---|
| 600 | DBG("adding module %s", *argv);
|
---|
| 601 | add_probe(*argv++);
|
---|
| 602 | } while (*argv);
|
---|
| 603 | } else {
|
---|
| 604 | /* First argument is module name, rest are parameters */
|
---|
| 605 | DBG("probing just module %s", *argv);
|
---|
| 606 | add_probe(argv[0]);
|
---|
[3232] | 607 | G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
|
---|
[2725] | 608 | }
|
---|
[821] | 609 |
|
---|
[2725] | 610 | /* Happens if all requested modules are already loaded */
|
---|
| 611 | if (G.probes == NULL)
|
---|
| 612 | return EXIT_SUCCESS;
|
---|
[821] | 613 |
|
---|
[2725] | 614 | read_config("/etc/modprobe.conf");
|
---|
| 615 | read_config("/etc/modprobe.d");
|
---|
| 616 | if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
|
---|
| 617 | read_config("modules.symbols");
|
---|
| 618 | load_modules_dep();
|
---|
| 619 | if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
|
---|
| 620 | read_config("modules.alias");
|
---|
| 621 | load_modules_dep();
|
---|
[821] | 622 | }
|
---|
| 623 |
|
---|
[2725] | 624 | rc = 0;
|
---|
| 625 | while ((me = llist_pop(&G.probes)) != NULL) {
|
---|
| 626 | if (me->realnames == NULL) {
|
---|
| 627 | DBG("probing by module name");
|
---|
| 628 | /* This is not an alias. Literal names are blacklisted
|
---|
| 629 | * only if '-b' is given.
|
---|
[902] | 630 | */
|
---|
[3232] | 631 | if (!(opt & OPT_BLACKLIST)
|
---|
[2725] | 632 | || !(me->flags & MODULE_FLAG_BLACKLISTED)
|
---|
| 633 | ) {
|
---|
| 634 | rc |= do_modprobe(me);
|
---|
| 635 | }
|
---|
| 636 | continue;
|
---|
[902] | 637 | }
|
---|
[821] | 638 |
|
---|
[2725] | 639 | /* Probe all real names for the alias */
|
---|
| 640 | do {
|
---|
| 641 | char *realname = llist_pop(&me->realnames);
|
---|
| 642 | struct module_entry *m2;
|
---|
[821] | 643 |
|
---|
[2725] | 644 | DBG("probing alias %s by realname %s", me->modname, realname);
|
---|
| 645 | m2 = get_or_add_modentry(realname);
|
---|
| 646 | if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
|
---|
| 647 | && (!(m2->flags & MODULE_FLAG_LOADED)
|
---|
[3232] | 648 | || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
|
---|
[2725] | 649 | ) {
|
---|
| 650 | //TODO: we can pass "me" as 2nd param to do_modprobe,
|
---|
| 651 | //and make do_modprobe emit more meaningful error messages
|
---|
| 652 | //with alias name included, not just module name alias resolves to.
|
---|
| 653 | rc |= do_modprobe(m2);
|
---|
[821] | 654 | }
|
---|
[2725] | 655 | free(realname);
|
---|
| 656 | } while (me->realnames != NULL);
|
---|
[821] | 657 | }
|
---|
| 658 |
|
---|
[3621] | 659 | if (ENABLE_FEATURE_CLEAN_UP)
|
---|
| 660 | moddb_free(&G.db);
|
---|
| 661 |
|
---|
[2725] | 662 | return (rc != 0);
|
---|
[821] | 663 | }
|
---|