/* reverse mapping from the device file name to the devpath */
static int name_index(struct udev *udev, const char *devpath, const char *name, int add, int test)
{
char device[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE * 2];
size_t devlen = strlen(udev_get_dev_path(udev))+1;
size_t start;
int fd;
/* directory with device name */
util_strlcpy(filename, udev_get_dev_path(udev), sizeof(filename));
start = util_strlcat(filename, "/.udev/names/", sizeof(filename));
util_strlcat(filename, &name[devlen], sizeof(filename));
util_path_encode(&filename[start], sizeof(filename) - start);
/* entry with the devpath */
util_strlcpy(device, devpath, sizeof(device));
util_path_encode(device, sizeof(device));
util_strlcat(filename, "/", sizeof(filename));
util_strlcat(filename, device, sizeof(filename));
if (add) {
dbg(udev, "creating index: '%s'\n", filename);
util_create_path(udev, filename);
fd = open(filename, O_WRONLY|O_TRUNC|O_CREAT, 0644);
if (fd > 0)
close(fd);
} else {
dbg(udev, "removing index: '%s'\n", filename);
unlink(filename);
util_delete_path(udev, filename);
}
return 0;
}
/* manage "stack of names" with possibly specified device priorities */
static void link_update(struct udev_device *dev, const char *slink, bool add)
{
struct udev *udev = udev_device_get_udev(dev);
char name_enc[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE * 2];
char dirname[UTIL_PATH_SIZE];
const char *target;
char buf[UTIL_PATH_SIZE];
dbg(udev, "update symlink '%s' of '%s'\n", slink, udev_device_get_syspath(dev));
util_path_encode(&slink[strlen(udev_get_dev_path(udev))+1], name_enc, sizeof(name_enc));
util_strscpyl(dirname, sizeof(dirname), udev_get_run_path(udev), "/links/", name_enc, NULL);
util_strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
if (!add) {
dbg(udev, "removing index: '%s'\n", filename);
if (unlink(filename) == 0)
rmdir(dirname);
}
target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
if (target == NULL) {
info(udev, "no reference left, remove '%s'\n", slink);
if (unlink(slink) == 0)
util_delete_path(udev, slink);
} else {
info(udev, "creating link '%s' to '%s'\n", slink, target);
node_symlink(udev, target, slink);
}
if (add) {
int err;
dbg(udev, "creating index: '%s'\n", filename);
do {
int fd;
err = util_create_path(udev, filename);
if (err != 0 && err != -ENOENT)
break;
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
if (fd >= 0)
close(fd);
else
err = -errno;
} while (err == -ENOENT);
}
}
/* manage "stack of names" with possibly specified device priorities */
static void link_update(struct udev_device *dev, const char *slink, bool add)
{
struct udev *udev = udev_device_get_udev(dev);
char name_enc[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE * 2];
char dirname[UTIL_PATH_SIZE];
const char *target;
char buf[UTIL_PATH_SIZE];
dbg(udev, "update symlink '%s' of '%s'\n", slink, udev_device_get_syspath(dev));
util_path_encode(&slink[strlen(udev_get_dev_path(udev))+1], name_enc, sizeof(name_enc));
snprintf(dirname, sizeof(dirname), "%s/.udev/links/%s", udev_get_dev_path(udev), name_enc);
snprintf(filename, sizeof(filename), "%s/%c%u:%u", dirname,
strcmp(udev_device_get_subsystem(dev), "block") == 0 ? 'b' : 'c',
major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)));
if (!add) {
dbg(udev, "removing index: '%s'\n", filename);
unlink(filename);
util_delete_path(udev, filename);
}
target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
if (target == NULL) {
info(udev, "no reference left, remove '%s'\n", slink);
unlink(slink);
util_delete_path(udev, slink);
} else {
info(udev, "creating link '%s' to '%s'\n", slink, target);
node_symlink(udev, target, slink);
}
if (add) {
int err;
dbg(udev, "creating index: '%s'\n", filename);
do {
err = util_create_path(udev, filename);
if (err != 0 && err != -ENOENT)
break;
err = symlink(udev_device_get_devpath(dev), filename);
if (err != 0)
err = -errno;
} while (err == -ENOENT);
}
}
/* manage "stack of names" with possibly specified device priorities */
static int link_update(sd_device *dev, const char *slink, bool add) {
_cleanup_free_ char *target = NULL, *filename = NULL, *dirname = NULL;
char name_enc[PATH_MAX];
const char *id_filename;
int r;
assert(dev);
assert(slink);
r = device_get_id_filename(dev, &id_filename);
if (r < 0)
return log_device_debug_errno(dev, r, "Failed to get id_filename: %m");
util_path_encode(slink + STRLEN("/dev"), name_enc, sizeof(name_enc));
dirname = path_join("/run/udev/links/", name_enc);
if (!dirname)
return log_oom();
filename = path_join(dirname, id_filename);
if (!filename)
return log_oom();
if (!add && unlink(filename) == 0)
(void) rmdir(dirname);
r = link_find_prioritized(dev, add, dirname, &target);
if (r < 0) {
log_device_debug(dev, "No reference left, removing '%s'", slink);
if (unlink(slink) == 0)
(void) rmdir_parents(slink, "/");
} else
(void) node_symlink(dev, target, slink);
if (add)
do {
_cleanup_close_ int fd = -1;
r = mkdir_parents(filename, 0755);
if (!IN_SET(r, 0, -ENOENT))
break;
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
if (fd < 0)
r = -errno;
} while (r == -ENOENT);
return r;
}
/* manage "stack of names" with possibly specified device priorities */
static void link_update(struct udev_device *dev, const char *slink, bool add)
{
struct udev *udev = udev_device_get_udev(dev);
char name_enc[UTIL_PATH_SIZE];
char filename[UTIL_PATH_SIZE * 2];
char dirname[UTIL_PATH_SIZE];
const char *target;
char buf[UTIL_PATH_SIZE];
util_path_encode(slink + strlen("/dev"), name_enc, sizeof(name_enc));
strscpyl(dirname, sizeof(dirname), "/run/udev/links/", name_enc, NULL);
strscpyl(filename, sizeof(filename), dirname, "/", udev_device_get_id_filename(dev), NULL);
if (!add && unlink(filename) == 0)
rmdir(dirname);
target = link_find_prioritized(dev, add, dirname, buf, sizeof(buf));
if (target == NULL) {
log_debug("no reference left, remove '%s'", slink);
if (unlink(slink) == 0)
util_delete_path(udev, slink);
} else {
log_debug("creating link '%s' to '%s'", slink, target);
node_symlink(dev, target, slink);
}
if (add) {
int err;
do {
int fd;
err = mkdir_parents(filename, 0755);
if (err != 0 && err != -ENOENT)
break;
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
if (fd >= 0)
close(fd);
else
err = -errno;
} while (err == -ENOENT);
}
}
static int name_index_get_devices(struct udev *udev, const char *name, struct udev_list_node *dev_list)
{
char dirname[PATH_MAX];
size_t devlen = strlen(udev_get_dev_path(udev))+1;
size_t start;
DIR *dir;
int count = 0;
util_strlcpy(dirname, udev_get_dev_path(udev), sizeof(dirname));
start = util_strlcat(dirname, "/.udev/names/", sizeof(dirname));
util_strlcat(dirname, &name[devlen], sizeof(dirname));
util_path_encode(&dirname[start], sizeof(dirname) - start);
dir = opendir(dirname);
if (dir == NULL) {
dbg(udev, "no index directory '%s': %m\n", dirname);
count = -1;
goto out;
}
dbg(udev, "found index directory '%s'\n", dirname);
while (1) {
struct dirent *ent;
char device[UTIL_PATH_SIZE];
ent = readdir(dir);
if (ent == NULL || ent->d_name[0] == '\0')
break;
if (ent->d_name[0] == '.')
continue;
util_strlcpy(device, udev_get_sys_path(udev), sizeof(device));
util_strlcat(device, ent->d_name, sizeof(device));
util_path_decode(device);
udev_list_entry_add(udev, dev_list, device, NULL, 1, 0);
count++;
}
closedir(dir);
out:
return count;
}
static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], bool test)
{
struct udev *udev = udev_device_get_udev(dev);
static const char *searchpath[] = { FIRMWARE_PATH };
char fwencpath[UTIL_PATH_SIZE];
char misspath[UTIL_PATH_SIZE];
char loadpath[UTIL_PATH_SIZE];
char datapath[UTIL_PATH_SIZE];
char fwpath[UTIL_PATH_SIZE];
const char *firmware;
FILE *fwfile = NULL;
struct utsname kernel;
struct stat statbuf;
unsigned int i;
int rc = EXIT_SUCCESS;
firmware = udev_device_get_property_value(dev, "FIRMWARE");
if (firmware == NULL) {
log_error("firmware parameter missing\n\n");
rc = EXIT_FAILURE;
goto exit;
}
/* lookup firmware file */
uname(&kernel);
for (i = 0; i < ELEMENTSOF(searchpath); i++) {
util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], kernel.release, "/", firmware, NULL);
fwfile = fopen(fwpath, "re");
if (fwfile != NULL)
break;
util_strscpyl(fwpath, sizeof(fwpath), searchpath[i], firmware, NULL);
fwfile = fopen(fwpath, "re");
if (fwfile != NULL)
break;
}
util_path_encode(firmware, fwencpath, sizeof(fwencpath));
util_strscpyl(misspath, sizeof(misspath), "/run/udev/firmware-missing/", fwencpath, NULL);
util_strscpyl(loadpath, sizeof(loadpath), udev_device_get_syspath(dev), "/loading", NULL);
if (fwfile == NULL) {
int err;
/* This link indicates the missing firmware file and the associated device */
log_debug("did not find firmware file '%s'\n", firmware);
do {
err = mkdir_parents(misspath, 0755);
if (err != 0 && err != -ENOENT)
break;
err = symlink(udev_device_get_devpath(dev), misspath);
if (err != 0)
err = -errno;
} while (err == -ENOENT);
rc = EXIT_FAILURE;
/*
* Do not cancel the request in the initrd, the real root might have
* the firmware file and the 'coldplug' run in the real root will find
* this pending request and fulfill or cancel it.
* */
if (!in_initrd())
set_loading(udev, loadpath, "-1");
goto exit;
}
if (stat(fwpath, &statbuf) < 0 || statbuf.st_size == 0) {
if (!in_initrd())
set_loading(udev, loadpath, "-1");
rc = EXIT_FAILURE;
goto exit;
}
if (unlink(misspath) == 0)
util_delete_path(udev, misspath);
if (!set_loading(udev, loadpath, "1"))
goto exit;
util_strscpyl(datapath, sizeof(datapath), udev_device_get_syspath(dev), "/data", NULL);
if (!copy_firmware(udev, fwpath, datapath, statbuf.st_size)) {
log_error("error sending firmware '%s' to device\n", firmware);
set_loading(udev, loadpath, "-1");
rc = EXIT_FAILURE;
goto exit;
};
set_loading(udev, loadpath, "0");
exit:
if (fwfile)
fclose(fwfile);
return rc;
}
