#define _GNU_SOURCE
#include <sys/syscall.h>
+#include <sys/mman.h>
+#include <sys/utsname.h>
+
#include <stdlib.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <fcntl.h>
#include <syslog.h>
#include <glob.h>
-#include <sys/utsname.h>
+#include <elf.h>
+
+#include <libubox/list.h>
+
+#define DEF_MOD_PATH "/lib/modules/%s/"
+
+enum {
+ SCANNED,
+ PROBE,
+ LOADED,
+ FAILED,
+};
+
+struct module {
+ struct list_head list;
+
+ char *name;
+ char *depends;
-#define DEF_MOD_PATH "/lib/modules/%s/%s.ko"
-static int insmod(char *module, const char *options)
+ int size;
+ int usage;
+ int state;
+};
+
+static LIST_HEAD(modules);
+
+static struct module* find_module(char *name)
{
+ struct module *m = NULL;
+
+ list_for_each_entry(m, &modules, list)
+ if (!strcmp(m->name, name))
+ return m;
+ return NULL;
+}
+
+static void free_module(struct module *m)
+{
+ if (m->name)
+ free(m->name);
+ if (m->depends)
+ free(m->depends);
+ free(m);
+}
+
+static void free_modules(void)
+{
+ struct list_head *p, *n;
+
+ list_for_each_safe(p, n, &modules) {
+ struct module *m = container_of(p, struct module, list);
+ list_del(p);
+ free_module(m);
+ }
+}
+
+static char* get_module_path(char *name)
+{
+ static char path[256];
struct utsname ver;
- char path[256];
- void *data = 0;
struct stat s;
- int fd, ret = -1;
+ char *t;
+
+ if (!stat(name, &s))
+ return name;
uname(&ver);
- snprintf(path, 256, DEF_MOD_PATH, ver.release, module);
+ snprintf(path, 256, DEF_MOD_PATH "%s.ko", ver.release, name);
+
+ if (!stat(path, &s))
+ return path;
+
+ t = name;
+ while (t && *t) {
+ if (*t == '_')
+ *t = '-';
+ t++;
+ }
+
+ snprintf(path, 256, DEF_MOD_PATH "%s.ko", ver.release, name);
+
+ if (!stat(path, &s))
+ return path;
+
+ return NULL;
+}
+
+static char* get_module_name(char *path)
+{
+ static char name[32];
+ char *t;
+
+ strncpy(name, basename(path), sizeof(name));
+
+ t = strstr(name, ".ko");
+ if (t)
+ *t = '\0';
+ t = name;
+ while (t && *t) {
+ if (*t == '-')
+ *t = '_';
+ t++;
+ }
+
+ return name;
+}
+
+#if __WORDSIZE == 64
+static int elf_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
+{
+ const char *secnames;
+ Elf64_Ehdr *e;
+ Elf64_Shdr *sh;
+ int i;
+
+ e = (Elf64_Ehdr *) map;
+ sh = (Elf64_Shdr *) (map + e->e_shoff);
+
+ secnames = map + sh[e->e_shstrndx].sh_offset;
+ for (i = 0; i < e->e_shnum; i++) {
+ if (!strcmp(section, secnames + sh[i].sh_name)) {
+ *size = sh[i].sh_size;
+ *offset = sh[i].sh_offset;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+#else
+static int elf_find_section(char *map, const char *section, unsigned int *offset, unsigned int *size)
+{
+ const char *secnames;
+ Elf32_Ehdr *e;
+ Elf32_Shdr *sh;
+ int i;
+
+ e = (Elf32_Ehdr *) map;
+ sh = (Elf32_Shdr *) (map + e->e_shoff);
+
+ secnames = map + sh[e->e_shstrndx].sh_offset;
+ for (i = 0; i < e->e_shnum; i++) {
+ if (!strcmp(section, secnames + sh[i].sh_name)) {
+ *size = sh[i].sh_size;
+ *offset = sh[i].sh_offset;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+#endif
+
+static int scan_loaded_modules(void)
+{
+ FILE *fp = fopen("/proc/modules", "r");
+ char buf[256];
+
+ if (!fp) {
+ fprintf(stderr, "failed to open /proc/modules\n");
+ return -1;
+ }
+
+ while (fgets(buf, sizeof(buf), fp)) {
+ struct module m;
+ struct module *n;
+
+ m.name = strtok(buf, " ");
+ m.size = atoi(strtok(NULL, " "));
+ m.usage = atoi(strtok(NULL, " "));
+ m.depends = strtok(NULL, " ");
+
+ if (!m.name || !m.depends)
+ continue;
+
+ n = malloc(sizeof(struct module));
+ if (!n)
+ continue;
+
+ n->name = strdup(m.name);
+ n->depends = strdup(m.depends);
+ n->size = m.size;
+ n->usage = m.usage;
+ n->state = LOADED;
+
+ list_add_tail(&n->list, &modules);
+ }
+
+ return 0;
+}
+
+static struct module* get_module_info(char *module)
+{
+ int fd = open(module, O_RDONLY);
+ unsigned int offset, size;
+ char *map, *strings;
+ struct module *m;
+ struct stat s;
+
+ if (!fd) {
+ fprintf(stderr, "failed to open %s\n", module);
+ return NULL;
+ }
+
+ if (fstat(fd, &s) == -1) {
+ fprintf(stderr, "failed to stat %s\n", module);
+ return NULL;
+ }
+
+ map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+ if (map == MAP_FAILED) {
+ fprintf(stderr, "failed to mmap %s\n", module);
+ return NULL;
+ }
+
+ if (elf_find_section(map, ".modinfo", &offset, &size)) {
+ fprintf(stderr, "failed to load the .modinfo section from %s\n", module);
+ return NULL;
+ }
+
+ strings = map + offset;
+ m = malloc(sizeof(struct module));
+ if (!m)
+ return NULL;
+
+ memset(m, 0, sizeof(struct module));
+ m->size = s.st_size;
+ while (strings && (strings < map + offset + size)) {
+ char *sep;
+ int len;
+
+ while (!strings[0])
+ strings++;
+ sep = strstr(strings, "=");
+ if (!sep)
+ break;
+ len = sep - strings;
+ sep++;
+ if (!strncmp(strings, "depends=", len + 1))
+ m->depends = strdup(sep);
+ strings = &sep[strlen(sep)];
+ }
+
+ m->state = SCANNED;
+
+ return m;
+}
+
+static int scan_module_folder(char *dir)
+{
+ int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
+ int j;
+ glob_t gl;
+
+ if (glob(dir, gl_flags, NULL, &gl) < 0)
+ return -1;
+
+ for (j = 0; j < gl.gl_pathc; j++) {
+ char *name = get_module_name(gl.gl_pathv[j]);
+ struct module *m;
+
+ if (!name)
+ continue;
+
+ m = find_module(name);
+ if (!m) {
+ m = get_module_info(gl.gl_pathv[j]);
+ m->name = strdup(name);
+ list_add_tail(&m->list, &modules);
+ }
+ }
+
+ globfree(&gl);
+
+ return 0;
+}
+
+static int print_modinfo(char *module)
+{
+ int fd = open(module, O_RDONLY);
+ unsigned int offset, size;
+ struct stat s;
+ char *map, *strings;
+
+ if (!fd) {
+ fprintf(stderr, "failed to open %s\n", module);
+ return -1;
+ }
+
+ if (fstat(fd, &s) == -1) {
+ fprintf(stderr, "failed to stat %s\n", module);
+ return -1;
+ }
+
+ map = mmap(NULL, s.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
+ if (map == MAP_FAILED) {
+ fprintf(stderr, "failed to mmap %s\n", module);
+ return -1;
+ }
+
+ if (elf_find_section(map, ".modinfo", &offset, &size)) {
+ fprintf(stderr, "failed to load the .modinfo section from %s\n", module);
+ return -1;
+ }
+
+ strings = map + offset;
+ printf("module:\t\t%s\n", module);
+ while (strings && (strings < map + offset + size)) {
+ char *dup = NULL;
+ char *sep;
+
+ while (!strings[0])
+ strings++;
+ sep = strstr(strings, "=");
+ if (!sep)
+ break;
+ dup = strndup(strings, sep - strings);
+ sep++;
+ if (strncmp(strings, "parm", 4)) {
+ if (strlen(dup) < 7)
+ printf("%s:\t\t%s\n", dup, sep);
+ else
+ printf("%s:\t%s\n", dup, sep);
+ }
+ strings = &sep[strlen(sep)];
+ if (dup)
+ free(dup);
+ }
+
+ return 0;
+}
+
+static int insert_module(char *path, const char *options)
+{
+ void *data = 0;
+ struct stat s;
+ int fd, ret = -1;
if (stat(path, &s)) {
fprintf(stderr, "missing module %s\n", path);
if (read(fd, data, s.st_size) == s.st_size) {
ret = syscall(__NR_init_module, data, s.st_size, options);
if (ret)
- fprintf(stderr, "failed insert %s\n", module);
+ fprintf(stderr, "failed to insert %s\n", path);
} else {
fprintf(stderr, "failed to read full module %s\n", path);
}
return ret;
}
-/*static void rmmod(char *module)
+static int deps_available(struct module *m)
{
- syscall(__NR_delete_module, module, 0);
-}*/
+ char *deps = m->depends;
+ char *comma;
-int main(int argc, char **argv)
+ if (!strcmp(deps, "-"))
+ return 0;
+ while (*deps && (NULL != ((comma = strstr(deps, ","))))) {
+ *comma = '\0';
+
+ m = find_module(deps);
+
+ if (!m || (m->state != LOADED))
+ return -1;
+
+ deps = ++comma;
+ }
+
+ return 0;
+}
+
+static int load_depmod(void)
+{
+ int loaded, todo;
+ struct module *m;
+
+ do {
+ loaded = 0;
+ todo = 0;
+ list_for_each_entry(m, &modules, list) {
+ if ((m->state == PROBE) && (!deps_available(m))) {
+ if (!insert_module(get_module_path(m->name), "")) {
+ m->state = LOADED;
+ loaded++;
+ continue;
+ }
+ m->state = FAILED;
+ } else if (m->state == PROBE) {
+ todo++;
+ }
+ }
+// printf("loaded %d modules this pass\n", loaded);
+ } while (loaded);
+
+// printf("missing todos %d\n", todo);
+
+ return -todo;
+}
+
+static int print_insmod_usage(void)
+{
+ fprintf(stderr, "Usage:\n\tinsmod filename [args]\n");
+
+ return -1;
+}
+
+static int print_usage(char *arg)
+{
+ fprintf(stderr, "Usage:\n\t%s module\n", arg);
+
+ return -1;
+}
+
+static int main_insmod(int argc, char **argv)
+{
+ char options[256] = "";
+ char *name;
+ int i;
+
+ if (argc < 2)
+ return print_insmod_usage();
+
+ name = get_module_name(argv[1]);
+ if (!name) {
+ fprintf(stderr, "cannot find module - %s\n", argv[1]);
+ return -1;
+ }
+
+ if (scan_loaded_modules())
+ return -1;
+
+ if (find_module(name)) {
+ fprintf(stderr, "module is already loaded - %s\n", name);
+ return -1;
+
+ }
+
+ free_modules();
+
+ for (i = 2; i < argc; i++)
+ if (snprintf(options, sizeof(options), "%s %s", options, argv[i]) >= sizeof(options)) {
+ fprintf(stderr, "argument line too long - %s\n", options);
+ return -1;
+ }
+
+ return insert_module(get_module_path(name), options);
+}
+
+static int main_rmmod(int argc, char **argv)
+{
+ struct module *m;
+ char *name;
+ int ret;
+
+ if (argc != 2)
+ return print_usage("rmmod");
+
+ if (scan_loaded_modules())
+ return -1;
+
+ name = get_module_name(argv[1]);
+ m = find_module(name);
+ if (!m) {
+ fprintf(stderr, "module is not loaded\n");
+ return -1;
+ }
+ free_modules();
+
+ ret = syscall(__NR_delete_module, name, 0);
+
+ if (ret)
+ fprintf(stderr, "unloading the module failed\n");
+
+ return ret;
+}
+
+static int main_lsmod(int argc, char **argv)
+{
+ struct module *m;
+
+ if (scan_loaded_modules())
+ return -1;
+
+ list_for_each_entry(m, &modules, list)
+ if (m->state == LOADED)
+ printf("%-20s%8d%3d %s\n",
+ m->name, m->size, m->usage,
+ (*m->depends == '-') ? ("") : (m->depends));
+
+ free_modules();
+
+ return 0;
+}
+
+static int main_modinfo(int argc, char **argv)
+{
+ char *module;
+
+ if (argc != 2)
+ return print_usage("modinfo");
+
+ module = get_module_path(argv[1]);
+ if (!module) {
+ fprintf(stderr, "cannot find module - %s\n", argv[1]);
+ return -1;
+ }
+
+ print_modinfo(module);
+
+ return 0;
+}
+
+static int main_depmod(int argc, char **argv)
+{
+ struct utsname ver;
+ struct module *m;
+ char path[128];
+ char *name;
+
+ if (argc != 2)
+ return print_usage("depmod");
+
+ if (scan_loaded_modules())
+ return -1;
+
+ uname(&ver);
+ snprintf(path, sizeof(path), DEF_MOD_PATH "*.ko", ver.release);
+
+ scan_module_folder(path);
+
+ name = get_module_name(argv[1]);
+ m = find_module(name);
+ if (m && m->state == LOADED) {
+ fprintf(stderr, "%s is already loaded\n", name);
+ return -1;
+ } else if (!m) {
+ fprintf(stderr, "failed to find a module named %s\n", name);
+ } else {
+ m->state = PROBE;
+ load_depmod();
+ }
+
+ free_modules();
+
+ return 0;
+}
+
+static int main_loader(int argc, char **argv)
{
- glob_t gl;
int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
- char *tmp = malloc(256);
char *dir = "/etc/modules.d/*";
+ glob_t gl;
+ char *path;
if (argc > 1)
dir = argv[1];
- syslog(0, "kmodloader: loading kernel modules from %s\n", dir);
+ path = malloc(strlen(dir) + 2);
+ strcpy(path, dir);
+ strcat(path, "*");
- if (glob(dir, gl_flags, NULL, &gl) >= 0) {
+ syslog(0, "kmodloader: loading kernel modules from %s\n", path);
+
+ if (glob(path, gl_flags, NULL, &gl) >= 0) {
int j;
for (j = 0; j < gl.gl_pathc; j++) {
if (!fp) {
fprintf(stderr, "failed to open %s\n", gl.gl_pathv[j]);
} else {
- char mod[64];
+ char mod[256];
+
+ while (fgets(mod, sizeof(mod), fp)) {
+ char *nl = strchr(mod, '\n');
+ char *opts;
+
+ if (nl)
+ *nl = '\0';
+
+ opts = strchr(mod, ' ');
+ if (opts)
+ *opts++ = '\0';
- while (fgets(mod, 64, fp)) {
- mod[strlen(mod) - 1] = '\0';
- insmod(mod, "");
+ insert_module(get_module_path(mod), (opts) ? (opts) : (""));
}
fclose(fp);
}
}
globfree(&gl);
- free(tmp);
+ free(path);
return 0;
}
+
+int main(int argc, char **argv)
+{
+ char *exec = basename(*argv);
+
+ if (!strcmp(exec, "insmod"))
+ return main_insmod(argc, argv);
+
+ if (!strcmp(exec, "rmmod"))
+ return main_rmmod(argc, argv);
+
+ if (!strcmp(exec, "lsmod"))
+ return main_lsmod(argc, argv);
+
+ if (!strcmp(exec, "modinfo"))
+ return main_modinfo(argc, argv);
+
+ if (!strcmp(exec, "depmod"))
+ return main_depmod(argc, argv);
+
+ return main_loader(argc, argv);
+}
projects / oweals / ubox.git / commitdiff