kmod-depmod: dump deps.

[thirdparty/kmod.git] / tools / kmod-depmod.c

diff --git a/tools/kmod-depmod.c b/tools/kmod-depmod.c
index 5e10f0563b54aa484303755175e291239bb74be2..db3e581743d83ae1e70b5e8aa5a901b13ba8718d 100644 (file)
--- a/tools/kmod-depmod.c
+++ b/tools/kmod-depmod.c
@@ -1676,6 +1676,119 @@ static int depmod_load(struct depmod *depmod)
        return 0;
 }
 
+static size_t mod_count_all_dependencies(const struct mod *mod)
+{
+       size_t i, count = 0;
+       for (i = 0; i < mod->deps.count; i++) {
+               const struct mod *d = mod->deps.array[i];
+               count += 1 + mod_count_all_dependencies(d);
+       }
+       return count;
+}
+
+static int mod_fill_all_unique_dependencies(const struct mod *mod, const struct mod **deps, size_t n_deps, size_t *last)
+{
+       size_t i;
+       int err = 0;
+       for (i = 0; i < mod->deps.count; i++) {
+               const struct mod *d = mod->deps.array[i];
+               size_t j;
+               uint8_t exists = 0;
+
+               for (j = 0; j < *last; j++) {
+                       if (deps[j] == d) {
+                               exists = 1;
+                               break;
+                       }
+               }
+
+               if (exists)
+                       continue;
+
+               if (*last >= n_deps)
+                       return -ENOSPC;
+               deps[*last] = d;
+               (*last)++;
+               err = mod_fill_all_unique_dependencies(d, deps, n_deps, last);
+               if (err < 0)
+                       break;
+       }
+       return err;
+}
+
+static const struct mod **mod_get_all_sorted_dependencies(const struct mod *mod, size_t *n_deps)
+{
+       const struct mod **deps;
+       size_t last = 0;
+
+       *n_deps = mod_count_all_dependencies(mod);
+       if (*n_deps == 0)
+               return NULL;
+
+       deps = malloc(sizeof(struct mod *) * (*n_deps));
+       if (deps == NULL)
+               return NULL;
+
+       if (mod_fill_all_unique_dependencies(mod, deps, *n_deps, &last) < 0) {
+               free(deps);
+               return NULL;
+       }
+
+       qsort(deps, last, sizeof(struct mod *), dep_cmp);
+       *n_deps = last;
+       return deps;
+}
+
+static inline const char *mod_get_compressed_path(const struct mod *mod)
+{
+       if (mod->relpath != NULL)
+               return mod->relpath;
+       return mod->path;
+}
+
+static int output_deps(struct depmod *depmod, FILE *out)
+{
+       size_t i;
+
+       for (i = 0; i < depmod->modules.count; i++) {
+               const struct mod **deps, *mod = depmod->modules.array[i];
+               const char *p = mod_get_compressed_path(mod);
+               size_t j, n_deps;
+
+               if (mod->dep_loop) {
+                       DBG("Ignored %s due dependency loops\n", p);
+                       continue;
+               }
+
+               fprintf(out, "%s:", p);
+
+               if (mod->deps.count == 0)
+                       goto end;
+
+               deps = mod_get_all_sorted_dependencies(mod, &n_deps);
+               if (deps == NULL) {
+                       ERR("Could not get all sorted dependencies of %s\n", p);
+                       goto end;
+               }
+
+               for (j = 0; j < n_deps; j++) {
+                       const struct mod *d = deps[j];
+                       if (d->dep_loop) {
+                               DBG("Ignored %s (dependency of %s) "
+                                   "due dependency loops\n",
+                                   mod_get_compressed_path(d), p);
+                               continue;
+                       }
+                       fprintf(out, " %s", mod_get_compressed_path(d));
+               }
+               free(deps);
+       end:
+               putc('\n', out);
+       }
+
+       return 0;
+}
+
 static int output_aliases(struct depmod *depmod, FILE *out)
 {
        size_t i;
@@ -1815,7 +1928,7 @@ static int depmod_output(struct depmod *depmod, FILE *out)
                const char *name;
                int (*cb)(struct depmod *depmod, FILE *out);
        } *itr, depfiles[] = {
-               //{"modules.dep", output_deps},
+               {"modules.dep", output_deps},
                //{"modules.dep.bin", output_deps_bin},
                {"modules.alias", output_aliases},
                //{"modules.alias.bin", output_aliases_bin},