modprobe-small: add depfile loading
This commit is contained in:
Denis Vlasenko
parent
7621ac20f2
commit
784369987f
@ -33,7 +33,8 @@ enum {
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typedef struct module_info {
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char *pathname;
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char *desc;
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char *aliases;
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char *deps;
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} module_info;
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/*
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@ -209,7 +210,7 @@ static int load_module(const char *fname, const char *options)
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#endif
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}
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static char* parse_module(const char *pathname)
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static void parse_module(module_info *info, const char *pathname)
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{
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char *module_image;
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char *ptr;
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@ -220,11 +221,10 @@ static char* parse_module(const char *pathname)
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/* Read (possibly compressed) module */
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len = 64 * 1024 * 1024; /* 64 Mb at most */
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module_image = read_module(pathname, &len);
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//TODO: optimize redundant module body reads
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/* "alias1 symbol:sym1 alias2 symbol:sym2" */
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reset_stringbuf();
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/* First desc line's format is
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* "alias1 symbol:sym1 alias2 symbol:sym2" */
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pos = 0;
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while (1) {
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ptr = find_keyword(module_image + pos, len - pos, "alias=");
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@ -247,8 +247,10 @@ static char* parse_module(const char *pathname)
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}
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bksp(); /* remove last ' ' */
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appendc('\0');
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info->aliases = copy_stringbuf();
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/* Second line: "dependency1 depandency2" */
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/* "dependency1 depandency2" */
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reset_stringbuf();
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ptr = find_keyword(module_image, len, "depends=");
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if (ptr && *ptr) {
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replace(ptr, ',', ' ');
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@ -257,9 +259,9 @@ static char* parse_module(const char *pathname)
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append(ptr);
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}
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appendc('\0');
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info->deps = copy_stringbuf();
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free(module_image);
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return copy_stringbuf();
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}
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static int pathname_matches_modname(const char *pathname, const char *modname)
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@ -294,9 +296,8 @@ static FAST_FUNC int fileAction(const char *pathname,
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modinfo = xrealloc_vector(modinfo, 12, cur);
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//TODO: use zeroing version of xrealloc_vector?
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modinfo[cur].pathname = xstrdup(pathname);
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modinfo[cur].desc = NULL;
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modinfo[cur].aliases = NULL;
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modinfo[cur+1].pathname = NULL;
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modinfo[cur+1].desc = NULL;
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if (!pathname_matches_modname(fname, modname_to_match)) {
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dbg1_error_msg("'%s' module name doesn't match", pathname);
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@ -305,7 +306,7 @@ static FAST_FUNC int fileAction(const char *pathname,
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dbg1_error_msg("'%s' module name matches", pathname);
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module_found_idx = cur;
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modinfo[cur].desc = parse_module(pathname);
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parse_module(&modinfo[cur], pathname);
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if (!(option_mask32 & OPT_r)) {
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if (load_module(pathname, module_load_options) == 0) {
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@ -319,6 +320,43 @@ static FAST_FUNC int fileAction(const char *pathname,
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return TRUE;
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}
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static void load_dep_bb(void)
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{
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char *line;
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FILE *fp = fopen(DEPFILE_BB, "r");
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if (!fp)
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return;
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while ((line = xmalloc_fgetline(fp)) != NULL) {
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char* space;
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int cur;
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if (!line[0]) {
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free(line);
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continue;
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}
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space = strchrnul(line, ' ');
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cur = module_count++;
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modinfo = xrealloc_vector(modinfo, 12, cur);
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//TODO: use zeroing version of xrealloc_vector?
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modinfo[cur+1].pathname = NULL;
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modinfo[cur].pathname = line; /* we take ownership of malloced block here */
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if (*space)
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*space++ = '\0';
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modinfo[cur].aliases = space;
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modinfo[cur].deps = xmalloc_fgetline(fp) ? : xzalloc(1);
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if (modinfo[cur].deps[0]) {
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/* deps are not "", so next line must be empty */
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line = xmalloc_fgetline(fp);
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/* Refuse to work with damaged config file */
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if (line && line[0])
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bb_error_msg_and_die("error in %s at '%s'", DEPFILE_BB, line);
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free(line);
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}
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}
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}
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static module_info* find_alias(const char *alias)
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{
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int i;
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@ -330,8 +368,9 @@ static module_info* find_alias(const char *alias)
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if (pathname_matches_modname(modinfo[i].pathname, alias)) {
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dbg1_error_msg("found '%s' in module '%s'",
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alias, modinfo[i].pathname);
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if (!modinfo[i].desc)
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modinfo[i].desc = parse_module(modinfo[i].pathname);
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if (!modinfo[i].aliases) {
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parse_module(&modinfo[i], modinfo[i].pathname);
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}
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return &modinfo[i];
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}
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i++;
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@ -341,11 +380,11 @@ static module_info* find_alias(const char *alias)
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i = 0;
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while (modinfo[i].pathname) {
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char *desc, *s;
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if (!modinfo[i].desc) {
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modinfo[i].desc = parse_module(modinfo[i].pathname);
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if (!modinfo[i].aliases) {
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parse_module(&modinfo[i], modinfo[i].pathname);
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}
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/* "alias1 symbol:sym1 alias2 symbol:sym2" */
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desc = str_2_list(modinfo[i].desc);
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desc = str_2_list(modinfo[i].aliases);
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/* Does matching substring exist? */
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for (s = desc; *s; s += strlen(s) + 1) {
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/* Aliases in module bodies can be defined with
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@ -475,10 +514,8 @@ static void process_module(char *name, const char *cmdline_options)
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goto ret;
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}
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/* Second line of desc contains dependencies */
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deps = str_2_list(info->desc + strlen(info->desc) + 1);
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/* Iterate thru dependencies, trying to (un)load them */
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deps = str_2_list(info->deps);
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for (s = deps; *s; s += strlen(s) + 1) {
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//if (strcmp(name, s) != 0) // N.B. do loops exist?
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dbg1_error_msg("recurse on dep '%s'", s);
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@ -600,6 +637,8 @@ int modprobe_main(int argc UNUSED_PARAM, char **argv)
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argv[1] = NULL;
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#endif
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load_dep_bb();
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/* Load/remove modules.
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* Only rmmod loops here, insmod/modprobe has only argv[0] */
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do {
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