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-rw-r--r--system/busybox/0009-depmod-support-generating-kmod-binary-index-files.patch510
1 files changed, 510 insertions, 0 deletions
diff --git a/system/busybox/0009-depmod-support-generating-kmod-binary-index-files.patch b/system/busybox/0009-depmod-support-generating-kmod-binary-index-files.patch
new file mode 100644
index 000000000..2034f5c88
--- /dev/null
+++ b/system/busybox/0009-depmod-support-generating-kmod-binary-index-files.patch
@@ -0,0 +1,510 @@
+From d13cb44f10d730eeac83340f71ea95b6faa0c142 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@iki.fi>
+Date: Sun, 25 Oct 2015 22:21:41 +0200
+Subject: [PATCH 09/16] depmod: support generating kmod binary index files
+
+This allows to use busybox depmod, and run daemons using libkmod (or
+even kmod modprobe if needed).
+
+About +1500 bytes when enabled. This patch merges some depmod code
+paths, so when this is disabled it shrinks the code size a little bit.
+---
+ modutils/Config.src | 9 ++
+ modutils/depmod.c | 281 ++++++++++++++++++++++++++++++++++++++++++----------
+ modutils/modprobe.c | 15 ---
+ modutils/modutils.c | 31 ++++++
+ modutils/modutils.h | 16 +++
+ 5 files changed, 286 insertions(+), 66 deletions(-)
+
+diff --git a/modutils/Config.src b/modutils/Config.src
+index e413702bb..1be7434a5 100644
+--- a/modutils/Config.src
++++ b/modutils/Config.src
+@@ -152,6 +152,15 @@ config FEATURE_MODUTILS_ALIAS
+
+ Say Y if unsure.
+
++config FEATURE_MODUTILS_BIN
++ bool "Support for the kmod .bin file format"
++ default n
++ depends on DEPMOD && !MODPROBE_SMALL
++ help
++ Generate kmod compatible binary index files for .dep, .alias,
++ .symbols and .builtin files. Allows mixing use of busybox
++ modutils and kmod (binaries and library).
++
+ config FEATURE_MODUTILS_SYMBOLS
+ bool "Support module.symbols file"
+ default y
+diff --git a/modutils/depmod.c b/modutils/depmod.c
+index 004c67a11..05c1a9bce 100644
+--- a/modutils/depmod.c
++++ b/modutils/depmod.c
+@@ -2,7 +2,7 @@
+ /*
+ * depmod - generate modules.dep
+ * Copyright (c) 2008 Bernhard Reutner-Fischer
+- * Copyrihgt (c) 2008 Timo Teras <timo.teras@iki.fi>
++ * Copyrihgt (c) 2008-2015 Timo Teras <timo.teras@iki.fi>
+ * Copyright (c) 2008 Vladimir Dronnikov
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+@@ -26,6 +26,24 @@
+ #include "modutils.h"
+ #include <sys/utsname.h> /* uname() */
+
++#define INDEX_MINCHAR 32
++#define INDEX_MAXCHAR 128
++
++typedef struct index_node {
++ char *prefix;
++ llist_t *values;
++ struct index_node *children[INDEX_MAXCHAR-INDEX_MINCHAR];
++} index_node;
++
++struct globals {
++ module_db db;
++ index_node *root_node;
++} FIX_ALIASING;
++#define G (*ptr_to_globals)
++#define INIT_G() do { \
++ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
++} while (0)
++
+ /*
+ * Theory of operation:
+ * - iterate over all modules and record their full path
+@@ -53,18 +71,12 @@ static int FAST_FUNC parse_module(const char *fname, struct stat *sb UNUSED_PARA
+
+ for (ptr = image; ptr < image + len - 10; ptr++) {
+ if (is_prefixed_with(ptr, "depends=")) {
+- char *u;
+-
+ ptr += 8;
+- for (u = ptr; *u; u++)
+- if (*u == '-')
+- *u = '_';
+- ptr += string_to_llist(ptr, &e->deps, ",");
++ string_to_llist(replace_underscores(ptr), &e->deps, ",");
+ } else if (ENABLE_FEATURE_MODUTILS_ALIAS
+ && is_prefixed_with(ptr, "alias=")
+ ) {
+- llist_add_to(&e->aliases, xstrdup(ptr + 6));
+- ptr += strlen(ptr);
++ llist_add_to(&e->aliases, replace_underscores(xstrdup(ptr + 6)));
+ } else if (ENABLE_FEATURE_MODUTILS_SYMBOLS
+ && is_prefixed_with(ptr, "__ksymtab_")
+ ) {
+@@ -74,9 +86,10 @@ static int FAST_FUNC parse_module(const char *fname, struct stat *sb UNUSED_PARA
+ ) {
+ continue;
+ }
+- llist_add_to(&e->symbols, xstrdup(ptr));
+- ptr += strlen(ptr);
+- }
++ llist_add_to(&e->symbols, xasprintf("symbol:%s", ptr));
++ } else
++ continue;
++ ptr += strlen(ptr);
+ }
+ free(image);
+
+@@ -108,12 +121,6 @@ static void order_dep_list(module_db *modules, module_entry *start, llist_t *add
+ }
+ }
+
+-static void xfreopen_write(const char *file, FILE *f)
+-{
+- if (freopen(file, "w", f) == NULL)
+- bb_perror_msg_and_die("can't open '%s'", file);
+-}
+-
+ //usage:#if !ENABLE_MODPROBE_SMALL
+ //usage:#define depmod_trivial_usage "[-n] [-b BASE] [VERSION] [MODFILES]..."
+ //usage:#define depmod_full_usage "\n\n"
+@@ -167,6 +174,169 @@ enum {
+ OPT_C = (1 << 9), /* -C,--config etc_modules_conf: ignored */
+ };
+
++/* Support for the mod binary index generation */
++
++static void index_init(const char *filename)
++{
++ if (ENABLE_FEATURE_MODUTILS_BIN) {
++ index_node *n;
++
++ n = xzalloc(sizeof(index_node));
++ n->prefix = xstrdup("");
++ G.root_node = n;
++ }
++
++ if (filename && !(option_mask32 & OPT_n)) {
++ if (freopen(filename, "w", stdout) == NULL)
++ bb_perror_msg_and_die("can't open '%s'", filename);
++ }
++}
++
++static void index_add(const char *key, char *value, const char *prefix)
++{
++ if (prefix && *prefix)
++ printf("%s%s %s\n", prefix, key, value);
++ else if (prefix)
++ printf("%s\n", value);
++
++ if (ENABLE_FEATURE_MODUTILS_BIN) {
++ index_node *cur = G.root_node, *n;
++ unsigned i = 0, j, ch;
++
++ while (1) {
++ /* Ensure node->prefix is a prefix of &str[i].
++ * If it is not already, then we must split node. */
++ for (j = 0; cur->prefix[j]; j++) {
++ ch = cur->prefix[j];
++ if (ch != key[i+j]) {
++ /* New child is copy of node with prefix[j+1..N] */
++ n = xzalloc(sizeof(index_node));
++ n->prefix = xstrdup(&cur->prefix[j+1]);
++ n->values = cur->values;
++ memcpy(n->children, cur->children, sizeof(n->children));
++
++ /* Parent has prefix[0..j], child at prefix[j] */
++ cur->prefix[j] = '\0';
++ cur->values = NULL;
++ memset(cur->children, 0, sizeof(cur->children));
++ cur->children[ch-INDEX_MINCHAR] = n;
++ break;
++ }
++ }
++ i += j;
++
++ ch = key[i];
++ if (ch == 0)
++ break;
++
++ if (ch < INDEX_MINCHAR || ch >= INDEX_MAXCHAR)
++ bb_error_msg_and_die("bad module name");
++
++ ch -= INDEX_MINCHAR;
++ if (!cur->children[ch]) {
++ n = xzalloc(sizeof(index_node));
++ cur->children[ch] = n;
++ n->prefix = xstrdup(&key[i+1]);
++ cur = n;
++ break;
++ }
++
++ /* Descend into child node and continue */
++ cur = cur->children[ch];
++ i++;
++ }
++
++ llist_add_to(&cur->values, value);
++ }
++}
++
++static uint32_t index_write_node(FILE *out, index_node *n, void (*freeit)(void *data))
++{
++ uint32_t child_offs[INDEX_MAXCHAR-INDEX_MINCHAR];
++ uint32_t offset;
++ uint8_t first = 255, last = 0;
++ unsigned i;
++
++ for (i = 0; i < INDEX_MAXCHAR-INDEX_MINCHAR; i++) {
++ child_offs[i] = 0;
++ if (!n->children[i])
++ continue;
++ child_offs[i] = index_write_node(out, n->children[i], freeit);
++ if (first > INDEX_MAXCHAR)
++ first = i;
++ last = i;
++ }
++
++ offset = ftell(out);
++
++ if (n->prefix[0]) {
++ fputs(n->prefix, out);
++ fputc('\0', out);
++ offset |= INDEX_NODE_PREFIX;
++ }
++
++ if (first < INDEX_MAXCHAR) {
++ fputc(first + INDEX_MINCHAR, out);
++ fputc(last + INDEX_MINCHAR, out);
++ fwrite(child_offs + first, sizeof(uint32_t), last - first + 1, out);
++ offset |= INDEX_NODE_CHILDS;
++ }
++
++ if (n->values) {
++ const llist_t *v;
++ unsigned int cnt;
++ uint32_t u;
++
++ n->values = llist_rev(n->values);
++ for (v = n->values, cnt = 0; v != NULL; v = v->link, cnt++);
++ u = htonl(cnt);
++ fwrite(&u, sizeof(u), 1, out);
++ for (v = n->values, cnt = 0; v != NULL; v = v->link, cnt++) {
++ u = htonl(cnt);
++ fwrite(&u, sizeof(u), 1, out);
++ fputs(v->data, out);
++ fputc('\0', out);
++ }
++ offset |= INDEX_NODE_VALUES;
++ }
++
++ llist_free(n->values, freeit);
++ free(n->prefix);
++ free(n);
++
++ return htonl(offset);
++}
++
++static void index_dump(const char *filename, int deps_file)
++{
++ if (ENABLE_FEATURE_MODUTILS_BIN) {
++ FILE *out;
++ uint32_t header[3] = {
++ htonl(INDEX_MAGIC),
++ htonl(INDEX_VERSION),
++ };
++
++ if (option_mask32 & OPT_n)
++ filename = "/dev/null";
++ else
++ filename = xasprintf("tmp.%s.bin", filename);
++
++ out = xfopen_for_write(filename);
++ fwrite(header, sizeof(uint32_t), 3, out);
++ header[2] = index_write_node(out, G.root_node, deps_file ? free : 0);
++ rewind(out);
++ G.root_node = NULL;
++ fwrite(header, sizeof(uint32_t), 3, out);
++ if (fclose(out)) {
++ remove(filename);
++ bb_error_msg_and_die(bb_msg_write_error);
++ }
++ /* .bin files are mmap'ed; not renaming it may crash
++ * long standing daemon using libkmod */
++ rename_or_warn(filename, filename + 4);
++ }
++}
++
+ int depmod_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+ int depmod_main(int argc UNUSED_PARAM, char **argv)
+ {
+@@ -178,6 +348,8 @@ int depmod_main(int argc UNUSED_PARAM, char **argv)
+ unsigned i;
+ int tmp;
+
++ INIT_G();
++
+ getopt32(argv, "aAb:eF:nruqC:", &moddir_base, NULL, NULL);
+ argv += optind;
+
+@@ -210,53 +382,60 @@ int depmod_main(int argc UNUSED_PARAM, char **argv)
+ }
+
+ /* Generate dependency and alias files */
+- if (!(option_mask32 & OPT_n))
+- xfreopen_write(CONFIG_DEFAULT_DEPMOD_FILE, stdout);
+-
++ index_init(CONFIG_DEFAULT_DEPMOD_FILE);
+ moddb_foreach_module(&modules, m, i) {
+- printf("%s:", m->name);
+-
++ char *buf = xasprintf("%s:", m->name);
+ order_dep_list(&modules, m, m->deps);
++
+ while (m->dnext != m) {
+ dep = m->dnext;
+- printf(" %s", dep->name);
+-
++ buf = gather_options_str(buf, dep->name);
+ /* unlink current entry */
+ dep->dnext->dprev = dep->dprev;
+ dep->dprev->dnext = dep->dnext;
+ dep->dnext = dep->dprev = dep;
+ }
+- bb_putchar('\n');
++ index_add(m->modname, buf, "");
+ }
+-
+-#if ENABLE_FEATURE_MODUTILS_ALIAS
+- if (!(option_mask32 & OPT_n))
+- xfreopen_write("modules.alias", stdout);
+- moddb_foreach_module(&modules, m, i) {
+- while (m->aliases) {
+- /*
+- * Last word used to be a basename
+- * (filename with path and .ko.* stripped)
+- * at the time of module-init-tools 3.4.
+- * kmod v.12 uses module name, i.e., s/-/_/g.
+- */
+- printf("alias %s %s\n",
+- (char*)llist_pop(&m->aliases),
+- m->modname);
++ index_dump(CONFIG_DEFAULT_DEPMOD_FILE, 1);
++
++ if (ENABLE_FEATURE_MODUTILS_ALIAS) {
++ index_init("modules.alias");
++ moddb_foreach_module(&modules, m, i) {
++ while (m->aliases) {
++ /*
++ * Last word used to be a basename
++ * (filename with path and .ko.* stripped)
++ * at the time of module-init-tools 3.4.
++ * kmod v.12 uses module name, i.e., s/-/_/g.
++ */
++ index_add((char*)llist_pop(&m->aliases), m->modname, "alias ");
++ }
+ }
++ index_dump("modules.alias", 0);
+ }
+-#endif
+-#if ENABLE_FEATURE_MODUTILS_SYMBOLS
+- if (!(option_mask32 & OPT_n))
+- xfreopen_write("modules.symbols", stdout);
+- moddb_foreach_module(&modules, m, i) {
+- while (m->symbols) {
+- printf("alias symbol:%s %s\n",
+- (char*)llist_pop(&m->symbols),
+- m->modname);
++ if (ENABLE_FEATURE_MODUTILS_SYMBOLS) {
++ index_init("modules.symbols");
++ moddb_foreach_module(&modules, m, i) {
++ while (m->symbols) {
++ index_add((char*)llist_pop(&m->symbols), m->modname, "alias ");
++ }
++ }
++ index_dump("modules.symbols", 0);
++ }
++ if (ENABLE_FEATURE_MODUTILS_BIN) {
++ char line[PATH_MAX], modname[MODULE_NAME_LEN];
++ FILE *in;
++
++ index_init(NULL);
++ in = xfopen_for_read("modules.builtin");
++ while (fgets(line, sizeof(line), in) != NULL) {
++ filename2modname(line, modname);
++ index_add(modname, (char *) "", 0);
+ }
++ fclose(in);
++ index_dump("modules.builtin", 0);
+ }
+-#endif
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ moddb_free(&modules);
+diff --git a/modutils/modprobe.c b/modutils/modprobe.c
+index 59f6d54f3..0a398a60f 100644
+--- a/modutils/modprobe.c
++++ b/modutils/modprobe.c
+@@ -192,21 +192,6 @@ struct globals {
+
+ static int read_config(const char *path);
+
+-static char *gather_options_str(char *opts, const char *append)
+-{
+- /* 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;
+-}
+-
+ static struct module_entry *get_or_add_modentry(const char *module)
+ {
+ return moddb_get_or_create(&G.db, module);
+diff --git a/modutils/modutils.c b/modutils/modutils.c
+index 6f7cd9721..257089af4 100644
+--- a/modutils/modutils.c
++++ b/modutils/modutils.c
+@@ -66,6 +66,21 @@ void FAST_FUNC moddb_free(module_db *db)
+ }
+ }
+
++char * FAST_FUNC gather_options_str(char *opts, const char *append)
++{
++ /* 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;
++}
++
+ void FAST_FUNC replace(char *s, char what, char with)
+ {
+ while (*s) {
+@@ -75,6 +90,22 @@ void FAST_FUNC replace(char *s, char what, char with)
+ }
+ }
+
++char* FAST_FUNC replace_underscores(char *s)
++{
++ int i;
++ for (i = 0; s[i]; i++) {
++ switch (s[i]) {
++ case '-':
++ s[i] = '_';
++ break;
++ case '[':
++ i += strcspn(&s[i], "]");
++ break;
++ }
++ }
++ return s;
++}
++
+ int FAST_FUNC string_to_llist(char *string, llist_t **llist, const char *delim)
+ {
+ char *tok;
+diff --git a/modutils/modutils.h b/modutils/modutils.h
+index 4a702e97c..73e816028 100644
+--- a/modutils/modutils.h
++++ b/modutils/modutils.h
+@@ -18,6 +18,20 @@ PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
+ #define MODULE_NAME_LEN 256
+ #define MODULE_HASH_SIZE 256
+
++/* .bin index format definitions */
++#define INDEX_MAGIC 0xB007F457
++#define INDEX_VERSION_MAJOR 0x0002
++#define INDEX_VERSION_MINOR 0x0001
++#define INDEX_VERSION ((INDEX_VERSION_MAJOR<<16)|INDEX_VERSION_MINOR)
++
++enum node_offset {
++ INDEX_NODE_FLAGS = 0xF0000000, /* Flags in high nibble */
++ INDEX_NODE_PREFIX = 0x80000000,
++ INDEX_NODE_VALUES = 0x40000000,
++ INDEX_NODE_CHILDS = 0x20000000,
++ INDEX_NODE_MASK = 0x0FFFFFFF, /* Offset value */
++};
++
+ typedef struct module_entry {
+ struct module_entry *next;
+ char *name, *modname;
+@@ -47,7 +61,9 @@ module_entry *moddb_get(module_db *db, const char *s) FAST_FUNC;
+ module_entry *moddb_get_or_create(module_db *db, const char *s) FAST_FUNC;
+ void moddb_free(module_db *db) FAST_FUNC;
+
++char *gather_options_str(char *opts, const char *append) FAST_FUNC;
+ void replace(char *s, char what, char with) FAST_FUNC;
++char *replace_underscores(char *s) FAST_FUNC;
+ int string_to_llist(char *string, llist_t **llist, const char *delim) FAST_FUNC;
+ char *filename2modname(const char *filename, char *modname) FAST_FUNC;
+ #if ENABLE_FEATURE_CMDLINE_MODULE_OPTIONS
+--
+2.16.2
+
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 01:15:03 +0000