svn commit: trunk/busybox/modutils
vda at busybox.net
vda at busybox.net
Wed Jul 9 08:31:01 PDT 2008
Author: vda
Date: 2008-07-09 08:30:57 -0700 (Wed, 09 Jul 2008)
New Revision: 22712
Log:
modprobe-small: preparatory patch for modprobe.dep.bb creation patches,
Code size impact ~0.
Modified:
trunk/busybox/modutils/modprobe-small.c
Changeset:
Modified: trunk/busybox/modutils/modprobe-small.c
===================================================================
--- trunk/busybox/modutils/modprobe-small.c 2008-07-09 15:05:36 UTC (rev 22711)
+++ trunk/busybox/modutils/modprobe-small.c 2008-07-09 15:30:57 UTC (rev 22712)
@@ -14,14 +14,17 @@
#include <sys/utsname.h> /* uname() */
#include <fnmatch.h>
+extern int init_module(void *module, unsigned long len, const char *options);
+extern int delete_module(const char *module, unsigned flags);
+extern int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
+
+
#define dbg1_error_msg(...) ((void)0)
#define dbg2_error_msg(...) ((void)0)
//#define dbg1_error_msg(...) bb_error_msg(__VA_ARGS__)
//#define dbg2_error_msg(...) bb_error_msg(__VA_ARGS__)
-extern int init_module(void *module, unsigned long len, const char *options);
-extern int delete_module(const char *module, unsigned flags);
-extern int query_module(const char *name, int which, void *buf, size_t bufsize, size_t *ret);
+#define DEPFILE_BB CONFIG_DEFAULT_DEPMOD_FILE".bb"
enum {
OPT_q = (1 << 0), /* be quiet */
@@ -63,6 +66,12 @@
stringbuf[stringbuf_idx++] = c;
}
+static void bksp(void)
+{
+ if (stringbuf_idx)
+ stringbuf_idx--;
+}
+
static void append(const char *s)
{
size_t len = strlen(s);
@@ -115,6 +124,19 @@
}
}
+/* Take "word word", return malloced "word",NUL,"word",NUL,NUL */
+static char* str_2_list(const char *str)
+{
+ int len = strlen(str) + 1;
+ char *dst = xmalloc(len + 1);
+
+ dst[len] = '\0';
+ memcpy(dst, str, len);
+//TODO: protect against 2+ spaces: "word word"
+ replace(dst, ' ', '\0');
+ return dst;
+}
+
#if ENABLE_FEATURE_MODPROBE_SMALL_ZIPPED
static char *xmalloc_open_zipped_read_close(const char *fname, size_t *sizep)
{
@@ -187,13 +209,13 @@
#endif
}
-static char* parse_module(const char *pathname, const char *name)
+static char* parse_module(const char *pathname)
{
char *module_image;
char *ptr;
size_t len;
size_t pos;
- dbg1_error_msg("parse_module('%s','%s')", pathname, name);
+ dbg1_error_msg("parse_module('%s')", pathname);
/* Read (possibly compressed) module */
len = 64 * 1024 * 1024; /* 64 Mb at most */
@@ -202,11 +224,7 @@
reset_stringbuf();
/* First desc line's format is
- * "modname alias1 symbol:sym1 alias2 symbol:sym2 " (note trailing ' ')
- */
- append(name);
- appendc(' ');
- /* Aliases */
+ * "alias1 symbol:sym1 alias2 symbol:sym2" */
pos = 0;
while (1) {
ptr = find_keyword(module_image + pos, len - pos, "alias=");
@@ -217,19 +235,20 @@
/* DOCME: __ksymtab_gpl and __ksymtab_strings occur
* in many modules. What do they mean? */
if (strcmp(ptr, "gpl") != 0 && strcmp(ptr, "strings") != 0) {
- dbg2_error_msg("alias: 'symbol:%s'", ptr);
+ dbg2_error_msg("alias:'symbol:%s'", ptr);
append("symbol:");
}
} else {
- dbg2_error_msg("alias: '%s'", ptr);
+ dbg2_error_msg("alias:'%s'", ptr);
}
append(ptr);
appendc(' ');
pos = (ptr - module_image);
}
+ bksp(); /* remove last ' ' */
appendc('\0');
- /* Second line: "dependency1 depandency2 " (note trailing ' ') */
+ /* Second line: "dependency1 depandency2" */
ptr = find_keyword(module_image, len, "depends=");
if (ptr && *ptr) {
replace(ptr, ',', ' ');
@@ -237,28 +256,31 @@
dbg2_error_msg("dep:'%s'", ptr);
append(ptr);
}
- appendc(' '); appendc('\0');
+ appendc('\0');
free(module_image);
return copy_stringbuf();
}
-static char* pathname_2_modname(const char *pathname)
+static int pathname_matches_modname(const char *pathname, const char *modname)
{
const char *fname = bb_get_last_path_component_nostrip(pathname);
const char *suffix = strrstr(fname, ".ko");
+//TODO: can do without malloc?
char *name = xstrndup(fname, suffix - fname);
+ int r;
replace(name, '-', '_');
- return name;
+ r = (strcmp(name, modname) == 0);
+ free(name);
+ return r;
}
static FAST_FUNC int fileAction(const char *pathname,
struct stat *sb UNUSED_PARAM,
- void *data,
+ void *modname_to_match,
int depth UNUSED_PARAM)
{
int cur;
- char *name;
const char *fname;
pathname += 2; /* skip "./" */
@@ -270,21 +292,20 @@
cur = module_count++;
modinfo = xrealloc_vector(modinfo, 12, cur);
+//TODO: use zeroing version of xrealloc_vector?
modinfo[cur].pathname = xstrdup(pathname);
modinfo[cur].desc = NULL;
modinfo[cur+1].pathname = NULL;
modinfo[cur+1].desc = NULL;
- name = pathname_2_modname(fname);
- if (strcmp(name, data) != 0) {
- free(name);
+ if (!pathname_matches_modname(fname, modname_to_match)) {
dbg1_error_msg("'%s' module name doesn't match", pathname);
return TRUE; /* module name doesn't match, continue search */
}
dbg1_error_msg("'%s' module name matches", pathname);
module_found_idx = cur;
- modinfo[cur].desc = parse_module(pathname, name);
+ modinfo[cur].desc = parse_module(pathname);
if (!(option_mask32 & OPT_r)) {
if (load_module(pathname, module_load_options) == 0) {
@@ -292,11 +313,9 @@
* This can happen ONLY for "top-level" module load,
* not a dep, because deps dont do dirscan. */
exit(EXIT_SUCCESS);
- /*free(name);return RECURSE_RESULT_ABORT;*/
}
}
- free(name);
return TRUE;
}
@@ -308,16 +327,13 @@
/* First try to find by name (cheaper) */
i = 0;
while (modinfo[i].pathname) {
- char *name = pathname_2_modname(modinfo[i].pathname);
- if (strcmp(name, alias) == 0) {
+ if (pathname_matches_modname(modinfo[i].pathname, alias)) {
dbg1_error_msg("found '%s' in module '%s'",
alias, modinfo[i].pathname);
if (!modinfo[i].desc)
- modinfo[i].desc = parse_module(modinfo[i].pathname, name);
- free(name);
+ modinfo[i].desc = parse_module(modinfo[i].pathname);
return &modinfo[i];
}
- free(name);
i++;
}
@@ -326,16 +342,13 @@
while (modinfo[i].pathname) {
char *desc, *s;
if (!modinfo[i].desc) {
- char *name = pathname_2_modname(modinfo[i].pathname);
- modinfo[i].desc = parse_module(modinfo[i].pathname, name);
- free(name);
+ modinfo[i].desc = parse_module(modinfo[i].pathname);
}
- /* "modname alias1 symbol:sym1 alias2 symbol:sym2 " */
- desc = xstrdup(modinfo[i].desc);
+ /* "alias1 symbol:sym1 alias2 symbol:sym2" */
+ desc = str_2_list(modinfo[i].desc);
/* Does matching substring exist? */
- replace(desc, ' ', '\0');
for (s = desc; *s; s += strlen(s) + 1) {
- /* aliases in module bodies can be defined with
+ /* Aliases in module bodies can be defined with
* shell patterns. Example:
* "pci:v000010DEd000000D9sv*sd*bc*sc*i*".
* Plain strcmp() won't catch that */
@@ -463,10 +476,8 @@
}
/* Second line of desc contains dependencies */
- deps = xstrdup(info->desc + strlen(info->desc) + 1);
+ deps = str_2_list(info->desc + strlen(info->desc) + 1);
- /* Transform deps to string list */
- replace(deps, ' ', '\0');
/* Iterate thru dependencies, trying to (un)load them */
for (s = deps; *s; s += strlen(s) + 1) {
//if (strcmp(name, s) != 0) // N.B. do loops exist?
@@ -481,12 +492,12 @@
errno = 0;
if (load_module(info->pathname, options) != 0) {
if (EEXIST != errno) {
- bb_error_msg("insert '%s' %s: %s",
- info->pathname, options,
+ bb_error_msg("'%s': %s",
+ info->pathname,
moderror(errno));
} else {
- dbg1_error_msg("insert '%s' %s: %s",
- info->pathname, options,
+ dbg1_error_msg("'%s': %s",
+ info->pathname,
moderror(errno));
}
}
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