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-rw-r--r--scripts/mod/modpost.c150
1 files changed, 133 insertions, 17 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 820eed87fb43..3961941e8e7a 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -38,6 +38,8 @@ static int sec_mismatch_count = 0;
static int sec_mismatch_fatal = 0;
/* ignore missing files */
static int ignore_missing_files;
+/* write namespace dependencies */
+static int write_namespace_deps;
enum export {
export_plain, export_unused, export_gpl,
@@ -164,6 +166,7 @@ struct symbol {
struct module *module;
unsigned int crc;
int crc_valid;
+ const char *namespace;
unsigned int weak:1;
unsigned int vmlinux:1; /* 1 if symbol is defined in vmlinux */
unsigned int kernel:1; /* 1 if symbol is from kernel
@@ -235,6 +238,37 @@ static struct symbol *find_symbol(const char *name)
return NULL;
}
+static bool contains_namespace(struct namespace_list *list,
+ const char *namespace)
+{
+ struct namespace_list *ns_entry;
+
+ for (ns_entry = list; ns_entry != NULL; ns_entry = ns_entry->next)
+ if (strcmp(ns_entry->namespace, namespace) == 0)
+ return true;
+
+ return false;
+}
+
+static void add_namespace(struct namespace_list **list, const char *namespace)
+{
+ struct namespace_list *ns_entry;
+
+ if (!contains_namespace(*list, namespace)) {
+ ns_entry = NOFAIL(malloc(sizeof(struct namespace_list) +
+ strlen(namespace) + 1));
+ strcpy(ns_entry->namespace, namespace);
+ ns_entry->next = *list;
+ *list = ns_entry;
+ }
+}
+
+static bool module_imports_namespace(struct module *module,
+ const char *namespace)
+{
+ return contains_namespace(module->imported_namespaces, namespace);
+}
+
static const struct {
const char *str;
enum export export;
@@ -314,23 +348,39 @@ static enum export export_from_sec(struct elf_info *elf, unsigned int sec)
return export_unknown;
}
+static const char *sym_extract_namespace(const char **symname)
+{
+ size_t n;
+ char *dupsymname;
+
+ n = strcspn(*symname, ".");
+ if (n < strlen(*symname) - 1) {
+ dupsymname = NOFAIL(strdup(*symname));
+ dupsymname[n] = '\0';
+ *symname = dupsymname;
+ return dupsymname + n + 1;
+ }
+
+ return NULL;
+}
+
/**
* Add an exported symbol - it may have already been added without a
* CRC, in this case just update the CRC
**/
-static struct symbol *sym_add_exported(const char *name, struct module *mod,
- enum export export)
+static struct symbol *sym_add_exported(const char *name, const char *namespace,
+ struct module *mod, enum export export)
{
struct symbol *s = find_symbol(name);
if (!s) {
s = new_symbol(name, mod, export);
+ s->namespace = namespace;
} else {
if (!s->preloaded) {
- warn("%s: '%s' exported twice. Previous export "
- "was in %s%s\n", mod->name, name,
- s->module->name,
- is_vmlinux(s->module->name) ?"":".ko");
+ warn("%s: '%s' exported twice. Previous export was in %s%s\n",
+ mod->name, name, s->module->name,
+ is_vmlinux(s->module->name) ? "" : ".ko");
} else {
/* In case Module.symvers was out of date */
s->module = mod;
@@ -622,6 +672,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
unsigned int crc;
enum export export;
bool is_crc = false;
+ const char *name, *namespace;
if ((!is_vmlinux(mod->name) || mod->is_dot_o) &&
strstarts(symname, "__ksymtab"))
@@ -693,8 +744,9 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
default:
/* All exported symbols */
if (strstarts(symname, "__ksymtab_")) {
- sym_add_exported(symname + strlen("__ksymtab_"), mod,
- export);
+ name = symname + strlen("__ksymtab_");
+ namespace = sym_extract_namespace(&name);
+ sym_add_exported(name, namespace, mod, export);
}
if (strcmp(symname, "init_module") == 0)
mod->has_init = 1;
@@ -1945,6 +1997,7 @@ static void read_symbols(const char *modname)
const char *symname;
char *version;
char *license;
+ char *namespace;
struct module *mod;
struct elf_info info = { };
Elf_Sym *sym;
@@ -1976,6 +2029,12 @@ static void read_symbols(const char *modname)
license = get_next_modinfo(&info, "license", license);
}
+ namespace = get_modinfo(&info, "import_ns");
+ while (namespace) {
+ add_namespace(&mod->imported_namespaces, namespace);
+ namespace = get_next_modinfo(&info, "import_ns", namespace);
+ }
+
for (sym = info.symtab_start; sym < info.symtab_stop; sym++) {
symname = remove_dot(info.strtab + sym->st_name);
@@ -2135,6 +2194,18 @@ static int check_exports(struct module *mod)
basename++;
else
basename = mod->name;
+
+ if (exp->namespace) {
+ add_namespace(&mod->required_namespaces,
+ exp->namespace);
+
+ if (!write_namespace_deps &&
+ !module_imports_namespace(mod, exp->namespace)) {
+ warn("module %s uses symbol %s from namespace %s, but does not import it.\n",
+ basename, exp->name, exp->namespace);
+ }
+ }
+
if (!mod->gpl_compatible)
check_for_gpl_usage(exp->export, basename, exp->name);
check_for_unused(exp->export, basename, exp->name);
@@ -2354,7 +2425,7 @@ static void read_dump(const char *fname, unsigned int kernel)
return;
while ((line = get_next_line(&pos, file, size))) {
- char *symname, *modname, *d, *export, *end;
+ char *symname, *namespace, *modname, *d, *export, *end;
unsigned int crc;
struct module *mod;
struct symbol *s;
@@ -2362,7 +2433,10 @@ static void read_dump(const char *fname, unsigned int kernel)
if (!(symname = strchr(line, '\t')))
goto fail;
*symname++ = '\0';
- if (!(modname = strchr(symname, '\t')))
+ if (!(namespace = strchr(symname, '\t')))
+ goto fail;
+ *namespace++ = '\0';
+ if (!(modname = strchr(namespace, '\t')))
goto fail;
*modname++ = '\0';
if ((export = strchr(modname, '\t')) != NULL)
@@ -2379,7 +2453,8 @@ static void read_dump(const char *fname, unsigned int kernel)
mod = new_module(modname);
mod->skip = 1;
}
- s = sym_add_exported(symname, mod, export_no(export));
+ s = sym_add_exported(symname, namespace, mod,
+ export_no(export));
s->kernel = kernel;
s->preloaded = 1;
s->is_static = 0;
@@ -2409,16 +2484,20 @@ static void write_dump(const char *fname)
{
struct buffer buf = { };
struct symbol *symbol;
+ const char *namespace;
int n;
for (n = 0; n < SYMBOL_HASH_SIZE ; n++) {
symbol = symbolhash[n];
while (symbol) {
- if (dump_sym(symbol))
- buf_printf(&buf, "0x%08x\t%s\t%s\t%s\n",
- symbol->crc, symbol->name,
- symbol->module->name,
- export_str(symbol->export));
+ if (dump_sym(symbol)) {
+ namespace = symbol->namespace;
+ buf_printf(&buf, "0x%08x\t%s\t%s\t%s\t%s\n",
+ symbol->crc, symbol->name,
+ namespace ? namespace : "",
+ symbol->module->name,
+ export_str(symbol->export));
+ }
symbol = symbol->next;
}
}
@@ -2426,6 +2505,31 @@ static void write_dump(const char *fname)
free(buf.p);
}
+static void write_namespace_deps_files(void)
+{
+ struct module *mod;
+ struct namespace_list *ns;
+ struct buffer ns_deps_buf = {};
+
+ for (mod = modules; mod; mod = mod->next) {
+ char fname[PATH_MAX];
+
+ if (mod->skip)
+ continue;
+
+ ns_deps_buf.pos = 0;
+
+ for (ns = mod->required_namespaces; ns; ns = ns->next)
+ buf_printf(&ns_deps_buf, "%s\n", ns->namespace);
+
+ if (ns_deps_buf.pos == 0)
+ continue;
+
+ sprintf(fname, "%s.ns_deps", mod->name);
+ write_if_changed(&ns_deps_buf, fname);
+ }
+}
+
struct ext_sym_list {
struct ext_sym_list *next;
const char *file;
@@ -2443,7 +2547,7 @@ int main(int argc, char **argv)
struct ext_sym_list *extsym_iter;
struct ext_sym_list *extsym_start = NULL;
- while ((opt = getopt(argc, argv, "i:I:e:mnsT:o:awE")) != -1) {
+ while ((opt = getopt(argc, argv, "i:I:e:mnsT:o:awEd")) != -1) {
switch (opt) {
case 'i':
kernel_read = optarg;
@@ -2484,6 +2588,9 @@ int main(int argc, char **argv)
case 'E':
sec_mismatch_fatal = 1;
break;
+ case 'd':
+ write_namespace_deps = 1;
+ break;
default:
exit(1);
}
@@ -2518,6 +2625,9 @@ int main(int argc, char **argv)
err |= check_modname_len(mod);
err |= check_exports(mod);
+ if (write_namespace_deps)
+ continue;
+
add_header(&buf, mod);
add_intree_flag(&buf, !external_module);
add_retpoline(&buf);
@@ -2530,6 +2640,12 @@ int main(int argc, char **argv)
sprintf(fname, "%s.mod.c", mod->name);
write_if_changed(&buf, fname);
}
+
+ if (write_namespace_deps) {
+ write_namespace_deps_files();
+ return 0;
+ }
+
if (dump_write)
write_dump(dump_write);
if (sec_mismatch_count && sec_mismatch_fatal)
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 20:04:30 +0000