[PATCH] support for modprobe.d
Natanael Copa
natanael.copa at gmail.com
Wed Jul 9 15:33:01 UTC 2008
On Wed, 2008-07-09 at 17:01 +0200, Natanael Copa wrote:
> hi,
>
> attatched is a patch from Timo Teräs that adds support for modprobe.d
>
> seems like it increase size on my hardened gcc-3.4.6 uclibc setup but
> reduce size on glibc + gcc-4.2.3
>
> includes a compilation fix for mtab
Some of my install -D stuff got included by mistake. sorry.
try attatched one instead.
-nc
-------------- next part --------------
Index: modutils/modprobe.c
===================================================================
--- modutils/modprobe.c (revision 22700)
+++ modutils/modprobe.c (working copy)
@@ -48,6 +48,10 @@
struct mod_list_t * m_next;
};
+struct include_conf_t {
+ struct dep_t *first;
+ struct dep_t *current;
+};
static struct dep_t *depend;
@@ -242,21 +246,60 @@
* This function reads aliases and default module options from a configuration file
* (/etc/modprobe.conf syntax). It supports includes (only files, no directories).
*/
-static void include_conf(struct dep_t **first, struct dep_t **current, char *buffer, int buflen, int fd)
+
+static int FAST_FUNC include_conf_file_act(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata,
+ int depth UNUSED_PARAM);
+
+static int FAST_FUNC include_conf_dir_act(const char *filename UNUSED_PARAM,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata UNUSED_PARAM,
+ int depth)
{
+ if (depth > 1)
+ return SKIP;
+
+ return TRUE;
+}
+
+static int inline include_conf_recursive(struct include_conf_t *conf, const char *filename)
+{
+ return recursive_action(filename, ACTION_RECURSE,
+ include_conf_file_act,
+ include_conf_dir_act,
+ conf, 1);
+}
+
+static int FAST_FUNC include_conf_file_act(const char *filename,
+ struct stat *statbuf UNUSED_PARAM,
+ void *userdata,
+ int depth UNUSED_PARAM)
+{
+ struct include_conf_t *conf = (struct include_conf_t *) userdata;
+ struct dep_t **first = &conf->first;
+ struct dep_t **current = &conf->current;
int continuation_line = 0;
+ int fd;
+ if (bb_basename(filename)[0] == '.')
+ return TRUE;
+
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return FALSE;
+
// alias parsing is not 100% correct (no correct handling of continuation lines within an alias)!
- while (reads(fd, buffer, buflen)) {
+ while (reads(fd, line_buffer, sizeof(line_buffer))) {
int l;
- *strchrnul(buffer, '#') = '\0';
+ *strchrnul(line_buffer, '#') = '\0';
- l = strlen(buffer);
+ l = strlen(line_buffer);
- while (l && isspace(buffer[l-1])) {
- buffer[l-1] = '\0';
+ while (l && isspace(line_buffer[l-1])) {
+ line_buffer[l-1] = '\0';
l--;
}
@@ -268,10 +311,10 @@
if (continuation_line)
continue;
- if (is_conf_command(buffer, "alias")) {
+ if (is_conf_command(line_buffer, "alias")) {
char *alias, *mod;
- if (parse_tag_value(buffer + 6, &alias, &mod)) {
+ if (parse_tag_value(line_buffer + 6, &alias, &mod)) {
/* handle alias as a module dependent on the aliased module */
if (!*current) {
(*first) = (*current) = xzalloc(sizeof(struct dep_t));
@@ -292,11 +335,11 @@
}
/*(*current)->m_next = NULL; - done by xzalloc */
}
- } else if (is_conf_command(buffer, "options")) {
+ } else if (is_conf_command(line_buffer, "options")) {
char *mod, *opt;
/* split the line in the module/alias name, and options */
- if (parse_tag_value(buffer + 8, &mod, &opt)) {
+ if (parse_tag_value(line_buffer + 8, &mod, &opt)) {
struct dep_t *dt;
/* find the corresponding module */
@@ -315,22 +358,17 @@
}
}
}
- } else if (is_conf_command(buffer, "include")) {
- int fdi;
- char *filename;
+ } else if (is_conf_command(line_buffer, "include")) {
+ char *includefile;
- filename = skip_whitespace(buffer + 8);
- fdi = open(filename, O_RDONLY);
- if (fdi >= 0) {
- include_conf(first, current, buffer, buflen, fdi);
- close(fdi);
- }
+ includefile = skip_whitespace(line_buffer + 8);
+ include_conf_recursive(conf, includefile);
} else if (ENABLE_FEATURE_MODPROBE_BLACKLIST &&
- (is_conf_command(buffer, "blacklist"))) {
+ (is_conf_command(line_buffer, "blacklist"))) {
char *mod;
struct dep_t *dt;
- mod = skip_whitespace(buffer + 10);
+ mod = skip_whitespace(line_buffer + 10);
for (dt = *first; dt; dt = dt->m_next) {
if (strcmp(dt->m_name, mod) == 0)
break;
@@ -339,8 +377,25 @@
dt->m_isblacklisted = 1;
}
} /* while (reads(...)) */
+
+ close(fd);
+ return TRUE;
}
+static int include_conf_file(struct include_conf_t *conf,
+ const char *filename)
+{
+ return include_conf_file_act(filename, NULL, conf, 0);
+}
+
+static int include_conf_file2(struct include_conf_t *conf,
+ const char *filename, const char *oldname)
+{
+ if (include_conf_file(conf, filename) == TRUE)
+ return TRUE;
+ return include_conf_file(conf, oldname);
+}
+
/*
* This function builds a list of dependency rules from /lib/modules/`uname -r`/modules.dep.
* It then fills every modules and aliases with their default options, found by parsing
@@ -350,8 +405,7 @@
{
int fd;
struct utsname un;
- struct dep_t *first = NULL;
- struct dep_t *current = NULL;
+ struct include_conf_t conf = { NULL, NULL };
char *filename;
int continuation_line = 0;
int k_version;
@@ -421,14 +475,14 @@
mod = xstrndup(mods, dot - mods);
/* enqueue new module */
- if (!current) {
- first = current = xzalloc(sizeof(struct dep_t));
+ if (!conf.current) {
+ conf.first = conf.current = xzalloc(sizeof(struct dep_t));
} else {
- current->m_next = xzalloc(sizeof(struct dep_t));
- current = current->m_next;
+ conf.current->m_next = xzalloc(sizeof(struct dep_t));
+ conf.current = conf.current->m_next;
}
- current->m_name = mod;
- current->m_path = xstrdup(modpath);
+ conf.current->m_name = mod;
+ conf.current->m_path = xstrdup(modpath);
/*current->m_options = NULL; - xzalloc did it*/
/*current->m_isalias = 0;*/
/*current->m_depcnt = 0;*/
@@ -482,8 +536,8 @@
dep = xstrndup(deps, next - deps - ext + 1);
/* Add the new dependable module name */
- current->m_deparr = xrealloc_vector(current->m_deparr, 2, current->m_depcnt);
- current->m_deparr[current->m_depcnt++] = dep;
+ conf.current->m_deparr = xrealloc_vector(conf.current->m_deparr, 2, conf.current->m_depcnt);
+ conf.current->m_deparr[conf.current->m_depcnt++] = dep;
p = next + 2;
} while (next < end);
@@ -500,52 +554,41 @@
* >=2.6: we only care about modprobe.conf
* <=2.4: we care about modules.conf and conf.modules
*/
- if (ENABLE_FEATURE_2_6_MODULES
- && (fd = open("/etc/modprobe.conf", O_RDONLY)) < 0)
- if (ENABLE_FEATURE_2_4_MODULES
- && (fd = open("/etc/modules.conf", O_RDONLY)) < 0)
- if (ENABLE_FEATURE_2_4_MODULES)
- fd = open("/etc/conf.modules", O_RDONLY);
+ {
+ int r = FALSE;
- if (fd >= 0) {
- include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
- close(fd);
+ if (ENABLE_FEATURE_2_6_MODULES) {
+ if (include_conf_file(&conf, "/etc/modprobe.conf"))
+ r = TRUE;
+ if (include_conf_recursive(&conf, "/etc/modprobe.d"))
+ r = TRUE;
+ }
+ if (ENABLE_FEATURE_2_4_MODULES && !r)
+ include_conf_file2(&conf,
+ "/etc/modules.conf",
+ "/etc/conf.modules");
}
/* Only 2.6 has a modules.alias file */
if (ENABLE_FEATURE_2_6_MODULES) {
/* Parse kernel-declared module aliases */
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.alias", un.release);
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- /* Ok, that didn't work. Fall back to looking in /lib/modules */
- fd = open(CONFIG_DEFAULT_MODULES_DIR"/modules.alias", O_RDONLY);
- }
+ include_conf_file2(&conf,
+ filename,
+ CONFIG_DEFAULT_MODULES_DIR"/modules.alias");
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
- if (fd >= 0) {
- include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
- close(fd);
- }
-
/* Parse kernel-declared symbol aliases */
filename = xasprintf(CONFIG_DEFAULT_MODULES_DIR"/%s/modules.symbols", un.release);
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- /* Ok, that didn't work. Fall back to looking in /lib/modules */
- fd = open(CONFIG_DEFAULT_MODULES_DIR"/modules.symbols", O_RDONLY);
- }
+ include_conf_file2(&conf,
+ filename,
+ CONFIG_DEFAULT_MODULES_DIR"/modules.symbols");
if (ENABLE_FEATURE_CLEAN_UP)
free(filename);
-
- if (fd >= 0) {
- include_conf(&first, ¤t, line_buffer, sizeof(line_buffer), fd);
- close(fd);
- }
}
- return first;
+ return conf.first;
}
/* return 1 = loaded, 0 = not loaded, -1 = can't tell */
Index: modutils/insmod.c
===================================================================
--- modutils/insmod.c (revision 22700)
+++ modutils/insmod.c (working copy)
@@ -3082,7 +3082,7 @@
if (i == f->header.e_shnum) {
struct obj_section *sec;
- f->sections = xrealloc(f->sections, 2, i);
+ f->sections = xrealloc_vector(f->sections, 2, i);
f->sections[i] = sec = arch_new_section();
f->header.e_shnum = i + 1;
More information about the busybox
mailing list