/*
* Modprobe written from scratch for BusyBox
*
- * Copyright (c) 2002 by Robert Griebl, griebl@gmx.de
- * Copyright (c) 2003 by Andrew Dennison, andrew.dennison@motec.com.au
- * Copyright (c) 2005 by Jim Bauer, jfbauer@nfr.com
+ * Copyright (c) 2008 Timo Teras <timo.teras@iki.fi>
+ * Copyright (c) 2008 Vladimir Dronnikov
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
-*/
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
-#include <sys/utsname.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-#include <getopt.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <syslog.h>
-#include <string.h>
-#include <ctype.h>
-#include <fcntl.h>
-#include "busybox.h"
+//applet:IF_MODPROBE(APPLET(modprobe, BB_DIR_SBIN, BB_SUID_DROP))
+#include "libbb.h"
+#include "modutils.h"
+#include <sys/utsname.h>
+#include <fnmatch.h>
+//#define DBG(fmt, ...) bb_error_msg("%s: " fmt, __func__, ## __VA_ARGS__)
+#define DBG(...) ((void)0)
-struct dep_t {
- char * m_name;
- char * m_path;
- char * m_options;
+/* Note that unlike older versions of modules.dep/depmod (busybox and m-i-t),
+ * we expect the full dependency list to be specified in modules.dep.
+ * Older versions would only export the direct dependency list.
+ */
- int m_isalias : 1;
- int m_reserved : 15;
- int m_depcnt : 16;
- char ** m_deparr;
+//usage:#if !ENABLE_MODPROBE_SMALL
+//usage:#define modprobe_notes_usage
+//usage: "modprobe can (un)load a stack of modules, passing each module options (when\n"
+//usage: "loading). modprobe uses a configuration file to determine what option(s) to\n"
+//usage: "pass each module it loads.\n"
+//usage: "\n"
+//usage: "The configuration file is searched (in this order):\n"
+//usage: "\n"
+//usage: " /etc/modprobe.conf (2.6 only)\n"
+//usage: " /etc/modules.conf\n"
+//usage: " /etc/conf.modules (deprecated)\n"
+//usage: "\n"
+//usage: "They all have the same syntax (see below). If none is present, it is\n"
+//usage: "_not_ an error; each loaded module is then expected to load without\n"
+//usage: "options. Once a file is found, the others are tested for.\n"
+//usage: "\n"
+//usage: "/etc/modules.conf entry format:\n"
+//usage: "\n"
+//usage: " alias <alias_name> <mod_name>\n"
+//usage: " Makes it possible to modprobe alias_name, when there is no such module.\n"
+//usage: " It makes sense if your mod_name is long, or you want a more representative\n"
+//usage: " name for that module (eg. 'scsi' in place of 'aha7xxx').\n"
+//usage: " This makes it also possible to use a different set of options (below) for\n"
+//usage: " the module and the alias.\n"
+//usage: " A module can be aliased more than once.\n"
+//usage: "\n"
+//usage: " options <mod_name|alias_name> <symbol=value...>\n"
+//usage: " When loading module mod_name (or the module aliased by alias_name), pass\n"
+//usage: " the \"symbol=value\" pairs as option to that module.\n"
+//usage: "\n"
+//usage: "Sample /etc/modules.conf file:\n"
+//usage: "\n"
+//usage: " options tulip irq=3\n"
+//usage: " alias tulip tulip2\n"
+//usage: " options tulip2 irq=4 io=0x308\n"
+//usage: "\n"
+//usage: "Other functionality offered by 'classic' modprobe is not available in\n"
+//usage: "this implementation.\n"
+//usage: "\n"
+//usage: "If module options are present both in the config file, and on the command line,\n"
+//usage: "then the options from the command line will be passed to the module _after_\n"
+//usage: "the options from the config file. That way, you can have defaults in the config\n"
+//usage: "file, and override them for a specific usage from the command line.\n"
+//usage:#define modprobe_example_usage
+//usage: "(with the above /etc/modules.conf):\n\n"
+//usage: "$ modprobe tulip\n"
+//usage: " will load the module 'tulip' with default option 'irq=3'\n\n"
+//usage: "$ modprobe tulip irq=5\n"
+//usage: " will load the module 'tulip' with option 'irq=5', thus overriding the default\n\n"
+//usage: "$ modprobe tulip2\n"
+//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308',\n"
+//usage: " which are the default for alias 'tulip2'\n\n"
+//usage: "$ modprobe tulip2 irq=8\n"
+//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=8',\n"
+//usage: " which are the default for alias 'tulip2' overridden by the option 'irq=8'\n\n"
+//usage: " from the command line\n\n"
+//usage: "$ modprobe tulip2 irq=2 io=0x210\n"
+//usage: " will load the module 'tulip' with default options 'irq=4 io=0x308 irq=4 io=0x210',\n"
+//usage: " which are the default for alias 'tulip2' overridden by the options 'irq=2 io=0x210'\n\n"
+//usage: " from the command line\n"
+//usage:
+//usage:#define modprobe_trivial_usage
+//usage: "[-alrqvsD" IF_FEATURE_MODPROBE_BLACKLIST("b") "]"
+//usage: " MODULE [symbol=value]..."
+//usage:#define modprobe_full_usage "\n\n"
+//usage: " -a Load multiple MODULEs"
+//usage: "\n -l List (MODULE is a pattern)"
+//usage: "\n -r Remove MODULE (stacks) or do autoclean"
+//usage: "\n -q Quiet"
+//usage: "\n -v Verbose"
+//usage: "\n -s Log to syslog"
+//usage: "\n -D Show dependencies"
+//usage: IF_FEATURE_MODPROBE_BLACKLIST(
+//usage: "\n -b Apply blacklist to module names too"
+//usage: )
+//usage:#endif /* !ENABLE_MODPROBE_SMALL */
+
+/* Note: usage text doesn't document various 2.4 options
+ * we pull in through INSMOD_OPTS define
+ * Note2: -b is always accepted, but if !FEATURE_MODPROBE_BLACKLIST,
+ * it is a no-op.
+ */
+#define MODPROBE_OPTS "alrDb"
+/* -a and -D _are_ in fact compatible */
+#define MODPROBE_COMPLEMENTARY ("q-v:v-q:l--arD:r--alD:a--lr:D--rl")
+//#define MODPROBE_OPTS "acd:lnrt:C:b"
+//#define MODPROBE_COMPLEMENTARY "q-v:v-q:l--acr:a--lr:r--al"
+enum {
+ OPT_INSERT_ALL = (INSMOD_OPT_UNUSED << 0), /* a */
+ //OPT_DUMP_ONLY = (INSMOD_OPT_UNUSED << x), /* c */
+ //OPT_DIRNAME = (INSMOD_OPT_UNUSED << x), /* d */
+ OPT_LIST_ONLY = (INSMOD_OPT_UNUSED << 1), /* l */
+ //OPT_SHOW_ONLY = (INSMOD_OPT_UNUSED << x), /* n */
+ OPT_REMOVE = (INSMOD_OPT_UNUSED << 2), /* r */
+ //OPT_RESTRICT = (INSMOD_OPT_UNUSED << x), /* t */
+ //OPT_VERONLY = (INSMOD_OPT_UNUSED << x), /* V */
+ //OPT_CONFIGFILE = (INSMOD_OPT_UNUSED << x), /* C */
+ OPT_SHOW_DEPS = (INSMOD_OPT_UNUSED << 3), /* D */
+ OPT_BLACKLIST = (INSMOD_OPT_UNUSED << 4) * ENABLE_FEATURE_MODPROBE_BLACKLIST,
+};
+#if ENABLE_LONG_OPTS
+static const char modprobe_longopts[] ALIGN1 =
+ /* nobody asked for long opts (yet) */
+ // "all\0" No_argument "a"
+ // "list\0" No_argument "l"
+ // "remove\0" No_argument "r"
+ // "quiet\0" No_argument "q"
+ // "verbose\0" No_argument "v"
+ // "syslog\0" No_argument "s"
+ /* module-init-tools 3.11.1 has only long opt --show-depends
+ * but no short -D, we provide long opt for scripts which
+ * were written for 3.11.1: */
+ "show-depends\0" No_argument "D"
+ // "use-blacklist\0" No_argument "b"
+ ;
+#endif
- struct dep_t * m_next;
+#define MODULE_FLAG_LOADED 0x0001
+#define MODULE_FLAG_NEED_DEPS 0x0002
+/* "was seen in modules.dep": */
+#define MODULE_FLAG_FOUND_IN_MODDEP 0x0004
+#define MODULE_FLAG_BLACKLISTED 0x0008
+
+struct module_entry { /* I'll call it ME. */
+ unsigned flags;
+ char *modname; /* stripped of /path/, .ext and s/-/_/g */
+ const char *probed_name; /* verbatim as seen on cmdline */
+ char *options; /* options from config files */
+ llist_t *realnames; /* strings. if this module is an alias, */
+ /* real module name is one of these. */
+//Can there really be more than one? Example from real kernel?
+ llist_t *deps; /* strings. modules we depend on */
};
-struct mod_list_t {
- char * m_name;
- char * m_path;
- char * m_options;
+#define DB_HASH_SIZE 256
- struct mod_list_t * m_prev;
- struct mod_list_t * m_next;
-};
+struct globals {
+ llist_t *probes; /* MEs of module(s) requested on cmdline */
+ char *cmdline_mopts; /* module options from cmdline */
+ int num_unresolved_deps;
+ /* bool. "Did we have 'symbol:FOO' requested on cmdline?" */
+ smallint need_symbols;
+ struct utsname uts;
+ llist_t *db[DB_HASH_SIZE]; /* MEs of all modules ever seen (caching for speed) */
+} FIX_ALIASING;
+#define G (*ptr_to_globals)
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+} while (0)
-static struct dep_t *depend;
-static int autoclean, show_only, quiet, do_syslog, verbose;
-static int k_version;
+static int read_config(const char *path);
-static int parse_tag_value ( char *buffer, char **ptag, char **pvalue )
+static char *gather_options_str(char *opts, const char *append)
{
- char *tag, *value;
-
- while ( isspace ( *buffer ))
- buffer++;
- tag = value = buffer;
- while ( !isspace ( *value ))
- if (!*value) return 0;
- else value++;
- *value++ = 0;
- while ( isspace ( *value ))
- value++;
- if (!*value) return 0;
-
- *ptag = tag;
- *pvalue = value;
-
- return 1;
+ /* Speed-optimized. We call gather_options_str many times. */
+ if (append) {
+ if (opts == NULL) {
+ opts = xstrdup(append);
+ } else {
+ int optlen = strlen(opts);
+ opts = xrealloc(opts, optlen + strlen(append) + 2);
+ sprintf(opts + optlen, " %s", append);
+ }
+ }
+ return opts;
}
-/* Jump through hoops to simulate how fgets() grabs just one line at a
- * time... Don't use any stdio since modprobe gets called from a kernel
- * thread and stdio junk can overflow the limited stack...
+/* These three functions called many times, optimizing for speed.
+ * Users reported minute-long delays when they runn iptables repeatedly
+ * (iptables use modprobe to install needed kernel modules).
*/
-static char *reads ( int fd, char *buffer, size_t len )
+static struct module_entry *helper_get_module(const char *module, int create)
{
- int n = read ( fd, buffer, len );
-
- if ( n > 0 ) {
- char *p;
+ char modname[MODULE_NAME_LEN];
+ struct module_entry *e;
+ llist_t *l;
+ unsigned i;
+ unsigned hash;
+
+ filename2modname(module, modname);
+
+ hash = 0;
+ for (i = 0; modname[i]; i++)
+ hash = ((hash << 5) + hash) + modname[i];
+ hash %= DB_HASH_SIZE;
+
+ for (l = G.db[hash]; l; l = l->link) {
+ e = (struct module_entry *) l->data;
+ if (strcmp(e->modname, modname) == 0)
+ return e;
+ }
+ if (!create)
+ return NULL;
- buffer [len-1] = 0;
- p = strchr ( buffer, '\n' );
+ e = xzalloc(sizeof(*e));
+ e->modname = xstrdup(modname);
+ llist_add_to(&G.db[hash], e);
- if ( p ) {
- off_t offset;
+ return e;
+}
+static ALWAYS_INLINE struct module_entry *get_or_add_modentry(const char *module)
+{
+ return helper_get_module(module, 1);
+}
+static ALWAYS_INLINE struct module_entry *get_modentry(const char *module)
+{
+ return helper_get_module(module, 0);
+}
- offset = lseek ( fd, 0L, SEEK_CUR ); // Get the current file descriptor offset
- lseek ( fd, offset-n + (p-buffer) + 1, SEEK_SET ); // Set the file descriptor offset to right after the \n
+static void add_probe(const char *name)
+{
+ struct module_entry *m;
- p[1] = 0;
- }
- return buffer;
+ m = get_or_add_modentry(name);
+ if (!(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
+ && (m->flags & MODULE_FLAG_LOADED)
+ ) {
+ DBG("skipping %s, it is already loaded", name);
+ return;
}
- else
- return 0;
+ DBG("queuing %s", name);
+ m->probed_name = name;
+ m->flags |= MODULE_FLAG_NEED_DEPS;
+ llist_add_to_end(&G.probes, m);
+ G.num_unresolved_deps++;
+ if (ENABLE_FEATURE_MODUTILS_SYMBOLS
+ && strncmp(m->modname, "symbol:", 7) == 0
+ ) {
+ G.need_symbols = 1;
+ }
}
-static struct dep_t *build_dep ( void )
+static int FAST_FUNC config_file_action(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata UNUSED_PARAM,
+ int depth UNUSED_PARAM)
{
- int fd;
- struct utsname un;
- struct dep_t *first = 0;
- struct dep_t *current = 0;
- char buffer[2048];
- char *filename = buffer;
- int continuation_line = 0;
-
- k_version = 0;
- if ( uname ( &un ))
- return 0;
-
- // check for buffer overflow in following code
- if ( bb_strlen ( un.release ) > ( sizeof( buffer ) - 64 )) {
- return 0;
- }
- if (un.release[0] == '2') {
- k_version = un.release[2] - '0';
- }
-
- strcpy ( filename, "/lib/modules/" );
- strcat ( filename, un.release );
- strcat ( filename, "/modules.dep" );
-
- if (( fd = open ( filename, O_RDONLY )) < 0 ) {
-
- /* Ok, that didn't work. Fall back to looking in /lib/modules */
- if (( fd = open ( "/lib/modules/modules.dep", O_RDONLY )) < 0 ) {
- return 0;
- }
+ char *tokens[3];
+ parser_t *p;
+ struct module_entry *m;
+ int rc = TRUE;
+
+ if (bb_basename(filename)[0] == '.')
+ goto error;
+
+ p = config_open2(filename, fopen_for_read);
+ if (p == NULL) {
+ rc = FALSE;
+ goto error;
}
- while ( reads ( fd, buffer, sizeof( buffer ))) {
- int l = bb_strlen ( buffer );
- char *p = 0;
-
- while ( isspace ( buffer [l-1] )) {
- buffer [l-1] = 0;
- l--;
- }
-
- if ( l == 0 ) {
- continuation_line = 0;
- continue;
- }
-
- if ( !continuation_line ) {
- char *col = strchr ( buffer, ':' );
- char *dot = col;
-
- if ( col ) {
- char *mods;
- char *modpath;
- char *mod;
-
- *col = 0;
- mods = strrchr ( buffer, '/' );
-
- if ( !mods )
- mods = buffer;
- else
- mods++;
-
- modpath = strchr ( buffer, '/' );
- if ( !modpath )
- modpath = buffer;
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( *(col-3) == '.' ) &&
- ( *(col-2) == 'k' ) && ( *(col-1) == 'o' ))
- dot = col - 3;
- else
-#endif
- if (( *(col-2) == '.' ) && ( *(col-1) == 'o' ))
- dot = col - 2;
-
- mod = bb_xstrndup ( mods, dot - mods );
+ while (config_read(p, tokens, 3, 2, "# \t", PARSE_NORMAL)) {
+//Use index_in_strings?
+ if (strcmp(tokens[0], "alias") == 0) {
+ /* alias <wildcard> <modulename> */
+ llist_t *l;
+ char wildcard[MODULE_NAME_LEN];
+ char *rmod;
+
+ if (tokens[2] == NULL)
+ continue;
+ filename2modname(tokens[1], wildcard);
+
+ for (l = G.probes; l; l = l->link) {
+ m = (struct module_entry *) l->data;
+ if (fnmatch(wildcard, m->modname, 0) != 0)
+ continue;
+ rmod = filename2modname(tokens[2], NULL);
+ llist_add_to(&m->realnames, rmod);
- if ( !current ) {
- first = current = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
+ if (m->flags & MODULE_FLAG_NEED_DEPS) {
+ m->flags &= ~MODULE_FLAG_NEED_DEPS;
+ G.num_unresolved_deps--;
}
- else {
- current-> m_next = (struct dep_t *) xmalloc ( sizeof ( struct dep_t ));
- current = current-> m_next;
- }
- current-> m_name = mod;
- current-> m_path = bb_xstrdup(modpath);
- current-> m_options = 0;
- current-> m_isalias = 0;
- current-> m_depcnt = 0;
- current-> m_deparr = 0;
- current-> m_next = 0;
-
- //printf ( "%s:\n", mod );
- p = col + 1;
- }
- else
- p = 0;
- }
- else
- p = buffer;
-
- while ( p && *p && isblank(*p))
- p++;
-
- if ( p && *p ) {
- char *end = &buffer [l-1];
- char *deps;
- char *dep;
- char *next;
- int ext = 0;
-
- while ( isblank ( *end ) || ( *end == '\\' ))
- end--;
-
- do
- {
- next = strchr (p, ' ' );
- if (next)
- {
- *next = 0;
- next--;
- }
- else
- next = end;
-
- deps = strrchr ( p, '/' );
- if ( !deps || ( deps < p )) {
- deps = p;
-
- while ( isblank ( *deps ))
- deps++;
+ m = get_or_add_modentry(rmod);
+ if (!(m->flags & MODULE_FLAG_NEED_DEPS)) {
+ m->flags |= MODULE_FLAG_NEED_DEPS;
+ G.num_unresolved_deps++;
}
- else
- deps++;
-
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ((k_version > 4) && ( *(next-2) == '.' ) && *(next-1) == 'k' &&
- ( *next == 'o' ))
- ext = 3;
- else
-#endif
- if (( *(next-1) == '.' ) && ( *next == 'o' ))
- ext = 2;
-
- /* Cope with blank lines */
- if ((next-deps-ext+1) <= 0)
- continue;
- dep = bb_xstrndup ( deps, next - deps - ext + 1 );
-
- current-> m_depcnt++;
- current-> m_deparr = (char **) xrealloc ( current-> m_deparr,
- sizeof ( char *) * current-> m_depcnt );
- current-> m_deparr [current-> m_depcnt - 1] = dep;
-
- //printf ( " %d) %s\n", current-> m_depcnt, current-> m_deparr [current-> m_depcnt -1] );
- p = next + 2;
- } while (next < end);
+ }
+ } else if (strcmp(tokens[0], "options") == 0) {
+ /* options <modulename> <option...> */
+ if (tokens[2] == NULL)
+ continue;
+ m = get_or_add_modentry(tokens[1]);
+ m->options = gather_options_str(m->options, tokens[2]);
+ } else if (strcmp(tokens[0], "include") == 0) {
+ /* include <filename> */
+ read_config(tokens[1]);
+ } else if (ENABLE_FEATURE_MODPROBE_BLACKLIST
+ && strcmp(tokens[0], "blacklist") == 0
+ ) {
+ /* blacklist <modulename> */
+ get_or_add_modentry(tokens[1])->flags |= MODULE_FLAG_BLACKLISTED;
}
-
- if ( buffer [l-1] == '\\' )
- continuation_line = 1;
- else
- continuation_line = 0;
}
- close ( fd );
-
- // alias parsing is not 100% correct (no correct handling of continuation lines within an alias) !
-
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if (( fd = open ( "/etc/modprobe.conf", O_RDONLY )) < 0 )
-#endif
- if (( fd = open ( "/etc/modules.conf", O_RDONLY )) < 0 )
- if (( fd = open ( "/etc/conf.modules", O_RDONLY )) < 0 )
- return first;
-
- continuation_line = 0;
- while ( reads ( fd, buffer, sizeof( buffer ))) {
- int l;
- char *p;
-
- p = strchr ( buffer, '#' );
- if ( p )
- *p = 0;
+ config_close(p);
+ error:
+ return rc;
+}
- l = bb_strlen ( buffer );
+static int read_config(const char *path)
+{
+ return recursive_action(path, ACTION_RECURSE | ACTION_QUIET,
+ config_file_action, NULL, NULL, 1);
+}
- while ( l && isspace ( buffer [l-1] )) {
- buffer [l-1] = 0;
- l--;
- }
+static const char *humanly_readable_name(struct module_entry *m)
+{
+ /* probed_name may be NULL. modname always exists. */
+ return m->probed_name ? m->probed_name : m->modname;
+}
- if ( l == 0 ) {
- continuation_line = 0;
+static char *parse_and_add_kcmdline_module_options(char *options, const char *modulename)
+{
+ char *kcmdline_buf;
+ char *kcmdline;
+ char *kptr;
+ int len;
+
+ kcmdline_buf = xmalloc_open_read_close("/proc/cmdline", NULL);
+ if (!kcmdline_buf)
+ return options;
+
+ kcmdline = kcmdline_buf;
+ len = strlen(modulename);
+ while ((kptr = strsep(&kcmdline, "\n\t ")) != NULL) {
+ if (strncmp(modulename, kptr, len) != 0)
continue;
- }
-
- if ( !continuation_line ) {
- if (( strncmp ( buffer, "alias", 5 ) == 0 ) && isspace ( buffer [5] )) {
- char *alias, *mod;
-
- if ( parse_tag_value ( buffer + 6, &alias, &mod )) {
- // fprintf ( stderr, "ALIAS: '%s' -> '%s'\n", alias, mod );
-
- if ( !current ) {
- first = current = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
- }
- else {
- current-> m_next = (struct dep_t *) xcalloc ( 1, sizeof ( struct dep_t ));
- current = current-> m_next;
- }
- current-> m_name = bb_xstrdup ( alias );
- current-> m_isalias = 1;
-
- if (( strcmp ( mod, "off" ) == 0 ) || ( strcmp ( mod, "null" ) == 0 )) {
- current-> m_depcnt = 0;
- current-> m_deparr = 0;
- }
- else {
- current-> m_depcnt = 1;
- current-> m_deparr = xmalloc ( 1 * sizeof( char * ));
- current-> m_deparr[0] = bb_xstrdup ( mod );
- }
- current-> m_next = 0;
- }
- }
- else if (( strncmp ( buffer, "options", 7 ) == 0 ) && isspace ( buffer [7] )) {
- char *mod, *opt;
-
- if ( parse_tag_value ( buffer + 8, &mod, &opt )) {
- struct dep_t *dt;
-
- for ( dt = first; dt; dt = dt-> m_next ) {
- if ( strcmp ( dt-> m_name, mod ) == 0 )
- break;
- }
- if ( dt ) {
- dt-> m_options = xrealloc ( dt-> m_options, bb_strlen( opt ) + 1 );
- strcpy ( dt-> m_options, opt );
-
- // fprintf ( stderr, "OPTION: '%s' -> '%s'\n", dt-> m_name, dt-> m_options );
- }
- }
- }
+ kptr += len;
+ if (*kptr != '.')
+ continue;
+ /* It is "modulename.xxxx" */
+ kptr++;
+ if (strchr(kptr, '=') != NULL) {
+ /* It is "modulename.opt=[val]" */
+ options = gather_options_str(options, kptr);
}
}
- close ( fd );
+ free(kcmdline_buf);
- return first;
+ return options;
}
-/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
-static int already_loaded (const char *name)
+/* Return: similar to bb_init_module:
+ * 0 on success,
+ * -errno on open/read error,
+ * errno on init_module() error
+ */
+/* NB: INSMOD_OPT_SILENT bit suppresses ONLY non-existent modules,
+ * not deleted ones (those are still listed in modules.dep).
+ * module-init-tools version 3.4:
+ * # modprobe bogus
+ * FATAL: Module bogus not found. [exitcode 1]
+ * # modprobe -q bogus [silent, exitcode still 1]
+ * but:
+ * # rm kernel/drivers/net/dummy.ko
+ * # modprobe -q dummy
+ * FATAL: Could not open '/lib/modules/xxx/kernel/drivers/net/dummy.ko': No such file or directory
+ * [exitcode 1]
+ */
+static int do_modprobe(struct module_entry *m)
{
- int fd;
- char buffer[4096];
-
- fd = open ("/proc/modules", O_RDONLY);
- if (fd < 0)
- return -1;
-
- while ( reads ( fd, buffer, sizeof( buffer ))) {
- char *p;
-
- p = strchr (buffer, ' ');
- if (p) {
- *p = 0;
- if (strcmp (name, buffer) == 0) {
- close (fd);
- return 1;
- }
- }
+ int rc, first;
+
+ if (!(m->flags & MODULE_FLAG_FOUND_IN_MODDEP)) {
+ if (!(option_mask32 & INSMOD_OPT_SILENT))
+ bb_error_msg("module %s not found in modules.dep",
+ humanly_readable_name(m));
+ return -ENOENT;
}
+ DBG("do_modprob'ing %s", m->modname);
- close (fd);
- return 0;
-}
+ if (!(option_mask32 & OPT_REMOVE))
+ m->deps = llist_rev(m->deps);
-static int mod_process ( struct mod_list_t *list, int do_insert )
-{
- int rc = 0;
- char *argv[10];
- int argc;
-
- while ( list ) {
- argc = 0;
- if ( do_insert ) {
- if (already_loaded (list->m_name) != 1) {
- argv[argc++] = "insmod";
- if (do_syslog)
- argv[argc++] = "-s";
- if (autoclean)
- argv[argc++] = "-k";
- if (quiet)
- argv[argc++] = "-q";
- argv[argc++] = list-> m_path;
- if (list-> m_options)
- argv[argc++] = list-> m_options;
- }
- } else {
- /* modutils uses short name for removal */
- if (already_loaded (list->m_name) != 0) {
- argv[argc++] = "rmmod";
- if (do_syslog)
- argv[argc++] = "-s";
- argv[argc++] = list->m_name;
- }
- }
- argv[argc] = NULL;
-
- if (argc) {
- if (verbose) {
- int i;
- for (i=0; i<argc; i++)
- printf("%s ", argv[i]);
- printf("\n");
- }
- if (!show_only) {
- int rc2 = 0;
- int status;
- switch (fork()) {
- case -1:
- rc2 = 1;
- break;
- case 0: //child
- execvp(argv[0], argv);
- bb_perror_msg_and_die("exec of %s", argv[0]);
- /* NOTREACHED */
- default:
- if (wait(&status) == -1) {
- rc2 = 1;
+ if (0) {
+ llist_t *l;
+ for (l = m->deps; l; l = l->link)
+ DBG("dep: %s", l->data);
+ }
+
+ first = 1;
+ rc = 0;
+ while (m->deps) {
+ struct module_entry *m2;
+ char *fn, *options;
+
+ rc = 0;
+ fn = llist_pop(&m->deps); /* we leak it */
+ m2 = get_or_add_modentry(fn);
+
+ if (option_mask32 & OPT_REMOVE) {
+ /* modprobe -r */
+ if (m2->flags & MODULE_FLAG_LOADED) {
+ rc = bb_delete_module(m2->modname, O_EXCL);
+ if (rc) {
+ if (first) {
+ bb_error_msg("can't unload module %s: %s",
+ humanly_readable_name(m2),
+ moderror(rc));
break;
}
- if (WIFEXITED(status))
- rc2 = WEXITSTATUS(status);
- if (WIFSIGNALED(status))
- rc2 = WTERMSIG(status);
- break;
- }
- if (do_insert) {
- rc = rc2; /* only last module matters */
- }
- else if (!rc2) {
- rc = 0; /* success if remove any mod */
+ } else {
+ m2->flags &= ~MODULE_FLAG_LOADED;
}
}
+ /* do not error out if *deps* fail to unload */
+ first = 0;
+ continue;
}
- list = do_insert ? list-> m_prev : list-> m_next;
- }
- return (show_only) ? 0 : rc;
-}
-static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t **tail )
-{
- struct mod_list_t *find;
- struct dep_t *dt;
- char *opt = 0;
- char *path = 0;
-
- // check dependencies
- for ( dt = depend; dt; dt = dt-> m_next ) {
- if ( strcmp ( dt-> m_name, mod ) == 0) {
- mod = dt-> m_name;
- path = dt-> m_path;
- opt = dt-> m_options;
- break;
+ options = m2->options;
+ m2->options = NULL;
+ options = parse_and_add_kcmdline_module_options(options, m2->modname);
+ if (m == m2)
+ options = gather_options_str(options, G.cmdline_mopts);
+
+ if (option_mask32 & OPT_SHOW_DEPS) {
+ printf(options ? "insmod %s/%s/%s %s\n"
+ : "insmod %s/%s/%s\n",
+ CONFIG_DEFAULT_MODULES_DIR, G.uts.release, fn,
+ options);
+ free(options);
+ continue;
}
- }
- // resolve alias names
- while ( dt && dt-> m_isalias ) {
- if ( dt-> m_depcnt == 1 ) {
- struct dep_t *adt;
-
- for ( adt = depend; adt; adt = adt-> m_next ) {
- if ( strcmp ( adt-> m_name, dt-> m_deparr [0] ) == 0 )
- break;
- }
- if ( adt ) {
- dt = adt;
- mod = dt-> m_name;
- path = dt-> m_path;
- if ( !opt )
- opt = dt-> m_options;
- }
- else
- return;
+ if (m2->flags & MODULE_FLAG_LOADED) {
+ DBG("%s is already loaded, skipping", fn);
+ free(options);
+ continue;
}
- else
- return;
- }
-
- if ( !path ) {
- bb_error_msg ("module %s not found.", mod);
- return;
- }
-
- // search for duplicates
- for ( find = *head; find; find = find-> m_next ) {
- if ( !strcmp ( mod, find-> m_name )) {
- // found -> dequeue it
-
- if ( find-> m_prev )
- find-> m_prev-> m_next = find-> m_next;
- else
- *head = find-> m_next;
- if ( find-> m_next )
- find-> m_next-> m_prev = find-> m_prev;
- else
- *tail = find-> m_prev;
-
- break; // there can be only one duplicate
+ rc = bb_init_module(fn, options);
+ DBG("loaded %s '%s', rc:%d", fn, options, rc);
+ if (rc == EEXIST)
+ rc = 0;
+ free(options);
+ if (rc) {
+ bb_error_msg("can't load module %s (%s): %s",
+ humanly_readable_name(m2),
+ fn,
+ moderror(rc)
+ );
+ break;
}
+ m2->flags |= MODULE_FLAG_LOADED;
}
- if ( !find ) { // did not find a duplicate
- find = (struct mod_list_t *) xmalloc ( sizeof(struct mod_list_t));
- find-> m_name = mod;
- find-> m_path = path;
- find-> m_options = opt;
- }
-
- // enqueue at tail
- if ( *tail )
- (*tail)-> m_next = find;
- find-> m_prev = *tail;
- find-> m_next = 0;
-
- if ( !*head )
- *head = find;
- *tail = find;
-
- if ( dt ) {
- int i;
-
- for ( i = 0; i < dt-> m_depcnt; i++ )
- check_dep ( dt-> m_deparr [i], head, tail );
- }
+ return rc;
}
-
-
-static int mod_insert ( char *mod, int argc, char **argv )
+static void load_modules_dep(void)
{
- struct mod_list_t *tail = 0;
- struct mod_list_t *head = 0;
- int rc;
-
- // get dep list for module mod
- check_dep ( mod, &head, &tail );
-
- if ( head && tail ) {
-#if defined(CONFIG_FEATURE_2_6_MODULES)
- if ( argc ) {
- int i;
- int l = 0;
-
- // append module args
- for ( i = 0; i < argc; i++ )
- l += ( bb_strlen ( argv [i] ) + 1 );
+ struct module_entry *m;
+ char *colon, *tokens[2];
+ parser_t *p;
+
+ /* Modprobe does not work at all without modules.dep,
+ * even if the full module name is given. Returning error here
+ * was making us later confuse user with this message:
+ * "module /full/path/to/existing/file/module.ko not found".
+ * It's better to die immediately, with good message.
+ * xfopen_for_read provides that. */
+ p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
+
+ while (G.num_unresolved_deps
+ && config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)
+ ) {
+ colon = last_char_is(tokens[0], ':');
+ if (colon == NULL)
+ continue;
+ *colon = 0;
- head-> m_options = xrealloc ( head-> m_options, l + 1 );
- head-> m_options [0] = 0;
+ m = get_modentry(tokens[0]);
+ if (m == NULL)
+ continue;
- for ( i = 0; i < argc; i++ ) {
- strcat ( head-> m_options, argv [i] );
- strcat ( head-> m_options, " " );
- }
+ /* Optimization... */
+ if ((m->flags & MODULE_FLAG_LOADED)
+ && !(option_mask32 & (OPT_REMOVE | OPT_SHOW_DEPS))
+ ) {
+ DBG("skip deps of %s, it's already loaded", tokens[0]);
+ continue;
}
-#endif
- // process tail ---> head
- rc = mod_process ( tail, 1 );
+ m->flags |= MODULE_FLAG_FOUND_IN_MODDEP;
+ if ((m->flags & MODULE_FLAG_NEED_DEPS) && (m->deps == NULL)) {
+ G.num_unresolved_deps--;
+ llist_add_to(&m->deps, xstrdup(tokens[0]));
+ if (tokens[1])
+ string_to_llist(tokens[1], &m->deps, " \t");
+ } else
+ DBG("skipping dep line");
}
- else
- rc = 1;
-
- return rc;
+ config_close(p);
}
-static int mod_remove ( char *mod )
+int modprobe_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int modprobe_main(int argc UNUSED_PARAM, char **argv)
{
int rc;
- static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
+ unsigned opt;
+ struct module_entry *me;
- struct mod_list_t *head = 0;
- struct mod_list_t *tail = 0;
+ INIT_G();
- if ( mod )
- check_dep ( mod, &head, &tail );
- else // autoclean
- head = tail = &rm_a_dummy;
+ IF_LONG_OPTS(applet_long_options = modprobe_longopts;)
+ opt_complementary = MODPROBE_COMPLEMENTARY;
+ opt = getopt32(argv, INSMOD_OPTS MODPROBE_OPTS INSMOD_ARGS);
+ argv += optind;
- if ( head && tail )
- rc = mod_process ( head, 0 ); // process head ---> tail
- else
- rc = 1;
- return rc;
+ /* Goto modules location */
+ xchdir(CONFIG_DEFAULT_MODULES_DIR);
+ uname(&G.uts);
+ xchdir(G.uts.release);
-}
-
-extern int modprobe_main(int argc, char** argv)
-{
- int opt;
- int remove_opt = 0;
-
- autoclean = show_only = quiet = do_syslog = verbose = 0;
-
- while ((opt = getopt(argc, argv, "acdklnqrst:vVC:")) != -1) {
- switch(opt) {
- case 'c': // no config used
- case 'l': // no pattern matching
- return EXIT_SUCCESS;
- break;
- case 'C': // no config used
- case 't': // no pattern matching
- bb_error_msg_and_die("-t and -C not supported");
-
- case 'a': // ignore
- case 'd': // ignore
- break;
- case 'k':
- autoclean++;
- break;
- case 'n':
- show_only++;
- break;
- case 'q':
- quiet++;
- break;
- case 'r':
- remove_opt++;
- break;
- case 's':
- do_syslog++;
- break;
- case 'v':
- verbose++;
- break;
- case 'V':
- default:
- bb_show_usage();
- break;
+ if (opt & OPT_LIST_ONLY) {
+ int i;
+ char name[MODULE_NAME_LEN];
+ char *colon, *tokens[2];
+ parser_t *p = config_open2(CONFIG_DEFAULT_DEPMOD_FILE, xfopen_for_read);
+
+ for (i = 0; argv[i]; i++)
+ replace(argv[i], '-', '_');
+
+ while (config_read(p, tokens, 2, 1, "# \t", PARSE_NORMAL)) {
+ colon = last_char_is(tokens[0], ':');
+ if (!colon)
+ continue;
+ *colon = '\0';
+ filename2modname(tokens[0], name);
+ if (!argv[0])
+ puts(tokens[0]);
+ else {
+ for (i = 0; argv[i]; i++) {
+ if (fnmatch(argv[i], name, 0) == 0) {
+ puts(tokens[0]);
+ }
+ }
+ }
}
+ return EXIT_SUCCESS;
}
- depend = build_dep ( );
+ /* Yes, for some reason -l ignores -s... */
+ if (opt & INSMOD_OPT_SYSLOG)
+ logmode = LOGMODE_SYSLOG;
+
+ if (!argv[0]) {
+ if (opt & OPT_REMOVE) {
+ /* "modprobe -r" (w/o params).
+ * "If name is NULL, all unused modules marked
+ * autoclean will be removed".
+ */
+ if (bb_delete_module(NULL, O_NONBLOCK | O_EXCL) != 0)
+ bb_perror_msg_and_die("rmmod");
+ }
+ return EXIT_SUCCESS;
+ }
- if ( !depend )
- bb_error_msg_and_die ( "could not parse modules.dep\n" );
+ /* Retrieve module names of already loaded modules */
+ {
+ char *s;
+ parser_t *parser = config_open2("/proc/modules", fopen_for_read);
+ while (config_read(parser, &s, 1, 1, "# \t", PARSE_NORMAL & ~PARSE_GREEDY))
+ get_or_add_modentry(s)->flags |= MODULE_FLAG_LOADED;
+ config_close(parser);
+ }
- if (remove_opt) {
- int rc = EXIT_SUCCESS;
+ if (opt & (OPT_INSERT_ALL | OPT_REMOVE)) {
+ /* Each argument is a module name */
do {
- if (mod_remove ( optind < argc ?
- bb_xstrdup (argv [optind]) : NULL )) {
- bb_error_msg ("failed to remove module %s",
- argv [optind] );
- rc = EXIT_FAILURE;
- }
- } while ( ++optind < argc );
+ DBG("adding module %s", *argv);
+ add_probe(*argv++);
+ } while (*argv);
+ } else {
+ /* First argument is module name, rest are parameters */
+ DBG("probing just module %s", *argv);
+ add_probe(argv[0]);
+ G.cmdline_mopts = parse_cmdline_module_options(argv, /*quote_spaces:*/ 1);
+ }
- return rc;
+ /* Happens if all requested modules are already loaded */
+ if (G.probes == NULL)
+ return EXIT_SUCCESS;
+
+ read_config("/etc/modprobe.conf");
+ read_config("/etc/modprobe.d");
+ if (ENABLE_FEATURE_MODUTILS_SYMBOLS && G.need_symbols)
+ read_config("modules.symbols");
+ load_modules_dep();
+ if (ENABLE_FEATURE_MODUTILS_ALIAS && G.num_unresolved_deps) {
+ read_config("modules.alias");
+ load_modules_dep();
}
- if (optind >= argc)
- bb_error_msg_and_die ( "No module or pattern provided\n" );
+ rc = 0;
+ while ((me = llist_pop(&G.probes)) != NULL) {
+ if (me->realnames == NULL) {
+ DBG("probing by module name");
+ /* This is not an alias. Literal names are blacklisted
+ * only if '-b' is given.
+ */
+ if (!(opt & OPT_BLACKLIST)
+ || !(me->flags & MODULE_FLAG_BLACKLISTED)
+ ) {
+ rc |= do_modprobe(me);
+ }
+ continue;
+ }
- if ( mod_insert ( bb_xstrdup ( argv [optind] ), argc - optind - 1, argv + optind + 1 ))
- bb_error_msg_and_die ( "failed to load module %s", argv [optind] );
+ /* Probe all real names for the alias */
+ do {
+ char *realname = llist_pop(&me->realnames);
+ struct module_entry *m2;
+
+ DBG("probing alias %s by realname %s", me->modname, realname);
+ m2 = get_or_add_modentry(realname);
+ if (!(m2->flags & MODULE_FLAG_BLACKLISTED)
+ && (!(m2->flags & MODULE_FLAG_LOADED)
+ || (opt & (OPT_REMOVE | OPT_SHOW_DEPS)))
+ ) {
+//TODO: we can pass "me" as 2nd param to do_modprobe,
+//and make do_modprobe emit more meaningful error messages
+//with alias name included, not just module name alias resolves to.
+ rc |= do_modprobe(m2);
+ }
+ free(realname);
+ } while (me->realnames != NULL);
+ }
- return EXIT_SUCCESS;
+ return (rc != 0);
}
projects / platform / upstream / busybox.git / blobdiff