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authorDenis Vlasenko2008-07-10 14:14:20 +0000
committerDenis Vlasenko2008-07-10 14:14:20 +0000
commit784369987f3014d5841e319fdef5211fc6b97236 (patch)
tree42f733d8fea04030e3d623f4944aa078768c45cc
parent7621ac20f231fc5d4b0bdeabb14dcc22794fd4cb (diff)
downloadbusybox-784369987f3014d5841e319fdef5211fc6b97236.zip
busybox-784369987f3014d5841e319fdef5211fc6b97236.tar.gz
modprobe-small: add depfile loading
-rw-r--r--modutils/modprobe-small.c75
1 files changed, 57 insertions, 18 deletions
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index 7220961..1a9d984 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -33,7 +33,8 @@ enum {
typedef struct module_info {
char *pathname;
- char *desc;
+ char *aliases;
+ char *deps;
} module_info;
/*
@@ -209,7 +210,7 @@ static int load_module(const char *fname, const char *options)
#endif
}
-static char* parse_module(const char *pathname)
+static void parse_module(module_info *info, const char *pathname)
{
char *module_image;
char *ptr;
@@ -220,11 +221,10 @@ static char* parse_module(const char *pathname)
/* Read (possibly compressed) module */
len = 64 * 1024 * 1024; /* 64 Mb at most */
module_image = read_module(pathname, &len);
+//TODO: optimize redundant module body reads
+ /* "alias1 symbol:sym1 alias2 symbol:sym2" */
reset_stringbuf();
-
- /* First desc line's format is
- * "alias1 symbol:sym1 alias2 symbol:sym2" */
pos = 0;
while (1) {
ptr = find_keyword(module_image + pos, len - pos, "alias=");
@@ -247,8 +247,10 @@ static char* parse_module(const char *pathname)
}
bksp(); /* remove last ' ' */
appendc('\0');
+ info->aliases = copy_stringbuf();
- /* Second line: "dependency1 depandency2" */
+ /* "dependency1 depandency2" */
+ reset_stringbuf();
ptr = find_keyword(module_image, len, "depends=");
if (ptr && *ptr) {
replace(ptr, ',', ' ');
@@ -257,9 +259,9 @@ static char* parse_module(const char *pathname)
append(ptr);
}
appendc('\0');
+ info->deps = copy_stringbuf();
free(module_image);
- return copy_stringbuf();
}
static int pathname_matches_modname(const char *pathname, const char *modname)
@@ -294,9 +296,8 @@ static FAST_FUNC int fileAction(const char *pathname,
modinfo = xrealloc_vector(modinfo, 12, cur);
//TODO: use zeroing version of xrealloc_vector?
modinfo[cur].pathname = xstrdup(pathname);
- modinfo[cur].desc = NULL;
+ modinfo[cur].aliases = NULL;
modinfo[cur+1].pathname = NULL;
- modinfo[cur+1].desc = NULL;
if (!pathname_matches_modname(fname, modname_to_match)) {
dbg1_error_msg("'%s' module name doesn't match", pathname);
@@ -305,7 +306,7 @@ static FAST_FUNC int fileAction(const char *pathname,
dbg1_error_msg("'%s' module name matches", pathname);
module_found_idx = cur;
- modinfo[cur].desc = parse_module(pathname);
+ parse_module(&modinfo[cur], pathname);
if (!(option_mask32 & OPT_r)) {
if (load_module(pathname, module_load_options) == 0) {
@@ -319,6 +320,43 @@ static FAST_FUNC int fileAction(const char *pathname,
return TRUE;
}
+static void load_dep_bb(void)
+{
+ char *line;
+ FILE *fp = fopen(DEPFILE_BB, "r");
+
+ if (!fp)
+ return;
+
+ while ((line = xmalloc_fgetline(fp)) != NULL) {
+ char* space;
+ int cur;
+
+ if (!line[0]) {
+ free(line);
+ continue;
+ }
+ space = strchrnul(line, ' ');
+ cur = module_count++;
+ modinfo = xrealloc_vector(modinfo, 12, cur);
+//TODO: use zeroing version of xrealloc_vector?
+ modinfo[cur+1].pathname = NULL;
+ modinfo[cur].pathname = line; /* we take ownership of malloced block here */
+ if (*space)
+ *space++ = '\0';
+ modinfo[cur].aliases = space;
+ modinfo[cur].deps = xmalloc_fgetline(fp) ? : xzalloc(1);
+ if (modinfo[cur].deps[0]) {
+ /* deps are not "", so next line must be empty */
+ line = xmalloc_fgetline(fp);
+ /* Refuse to work with damaged config file */
+ if (line && line[0])
+ bb_error_msg_and_die("error in %s at '%s'", DEPFILE_BB, line);
+ free(line);
+ }
+ }
+}
+
static module_info* find_alias(const char *alias)
{
int i;
@@ -330,8 +368,9 @@ static module_info* find_alias(const char *alias)
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);
+ if (!modinfo[i].aliases) {
+ parse_module(&modinfo[i], modinfo[i].pathname);
+ }
return &modinfo[i];
}
i++;
@@ -341,11 +380,11 @@ static module_info* find_alias(const char *alias)
i = 0;
while (modinfo[i].pathname) {
char *desc, *s;
- if (!modinfo[i].desc) {
- modinfo[i].desc = parse_module(modinfo[i].pathname);
+ if (!modinfo[i].aliases) {
+ parse_module(&modinfo[i], modinfo[i].pathname);
}
/* "alias1 symbol:sym1 alias2 symbol:sym2" */
- desc = str_2_list(modinfo[i].desc);
+ desc = str_2_list(modinfo[i].aliases);
/* Does matching substring exist? */
for (s = desc; *s; s += strlen(s) + 1) {
/* Aliases in module bodies can be defined with
@@ -475,10 +514,8 @@ static void process_module(char *name, const char *cmdline_options)
goto ret;
}
- /* Second line of desc contains dependencies */
- deps = str_2_list(info->desc + strlen(info->desc) + 1);
-
/* Iterate thru dependencies, trying to (un)load them */
+ deps = str_2_list(info->deps);
for (s = deps; *s; s += strlen(s) + 1) {
//if (strcmp(name, s) != 0) // N.B. do loops exist?
dbg1_error_msg("recurse on dep '%s'", s);
@@ -600,6 +637,8 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
argv[1] = NULL;
#endif
+ load_dep_bb();
+
/* Load/remove modules.
* Only rmmod loops here, insmod/modprobe has only argv[0] */
do {