struct udev_list_node sysname_match_list;
struct udev_list_node properties_match_list;
struct udev_list_node tags_match_list;
+ struct udev_device *parent_match;
struct udev_list_node devices_list;
struct syspath *devices;
unsigned int devices_cur;
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->sysname_match_list);
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->properties_match_list);
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->tags_match_list);
+ udev_device_unref(udev_enumerate->parent_match);
udev_list_cleanup_entries(udev_enumerate->udev, &udev_enumerate->devices_list);
for (i = 0; i < udev_enumerate->devices_cur; i++)
free(udev_enumerate->devices[i].syspath);
return 0;
}
+/**
+ * udev_enumerate_add_match_parent:
+ * @udev_enumerate: context
+ * @parent: filter for the parent device
+ *
+ * Return only the children of a given device.
+ *
+ * A reference for the device is held until the udev_enumerate context
+ * is cleaned up.
+ *
+ * Returns: 0 on success, otherwise a negative error value.
+ */
+UDEV_EXPORT int udev_enumerate_add_match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *parent)
+{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+ if (parent == NULL)
+ return 0;
+ if (udev_enumerate->parent_match != NULL)
+ udev_device_unref(udev_enumerate->parent_match);
+ udev_enumerate->parent_match = udev_device_ref(parent);
+ return 0;
+}
+
/**
* udev_enumerate_add_match_is_initialized:
* @udev_enumerate: context
return true;
}
+static bool match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *dev)
+{
+ const char *parent;
+
+ if (udev_enumerate->parent_match == NULL)
+ return true;
+
+ parent = udev_device_get_devpath(udev_enumerate->parent_match);
+ return strncmp(parent, udev_device_get_devpath(dev), strlen(parent)) == 0;
+}
+
static bool match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname)
{
struct udev_list_entry *list_entry;
(major(udev_device_get_devnum(dev)) > 0 || udev_device_get_ifindex(dev) > 0))
goto nomatch;
}
+ if (!match_parent(udev_enumerate, dev))
+ goto nomatch;
if (!match_tag(udev_enumerate, dev))
goto nomatch;
if (!match_property(udev_enumerate, dev))
return 0;
}
-/**
- * udev_enumerate_scan_devices:
- * @udev_enumerate: udev enumeration context
- *
- * Returns: 0 on success, otherwise a negative error value.
- **/
-UDEV_EXPORT int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate)
+static int scan_devices_tags(struct udev_enumerate *udev_enumerate)
{
struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
- char base[UTIL_PATH_SIZE];
- struct stat statbuf;
+ struct udev_list_entry *list_entry;
- if (udev_enumerate == NULL)
- return -EINVAL;
+ /* scan only tagged devices, use tags reverse-index, instead of searching all devices in /sys */
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->tags_match_list)) {
+ DIR *dir;
+ struct dirent *dent;
+ char path[UTIL_PATH_SIZE];
- if (udev_list_get_entry(&udev_enumerate->tags_match_list) != NULL) {
- struct udev_list_entry *list_entry;
+ util_strscpyl(path, sizeof(path), udev_get_run_path(udev), "/tags/",
+ udev_list_entry_get_name(list_entry), NULL);
+ dir = opendir(path);
+ if (dir == NULL)
+ continue;
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
+ struct udev_device *dev;
- /* scan only tagged devices, use tags reverse-index, instead of searching all devices in /sys */
- udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_enumerate->tags_match_list)) {
- DIR *dir;
- struct dirent *dent;
- char path[UTIL_PATH_SIZE];
+ if (dent->d_name[0] == '.')
+ continue;
- util_strscpyl(path, sizeof(path), udev_get_run_path(udev), "/tags/",
- udev_list_entry_get_name(list_entry), NULL);
- dir = opendir(path);
- if (dir == NULL)
+ dev = udev_device_new_from_id_filename(udev_enumerate->udev, dent->d_name);
+ if (dev == NULL)
continue;
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- struct udev_device *dev;
- if (dent->d_name[0] == '.')
- continue;
+ if (!match_subsystem(udev_enumerate, udev_device_get_subsystem(dev)))
+ goto nomatch;
+ if (!match_sysname(udev_enumerate, udev_device_get_sysname(dev)))
+ goto nomatch;
+ if (!match_parent(udev_enumerate, dev))
+ goto nomatch;
+ if (!match_property(udev_enumerate, dev))
+ goto nomatch;
+ if (!match_sysattr(udev_enumerate, dev))
+ goto nomatch;
- dev = udev_device_new_from_id_filename(udev_enumerate->udev, dent->d_name);
- if (dev == NULL)
- continue;
- syspath_add(udev_enumerate, udev_device_get_syspath(dev));
- udev_device_unref(dev);
- }
- closedir(dir);
+ syspath_add(udev_enumerate, udev_device_get_syspath(dev));
+nomatch:
+ udev_device_unref(dev);
}
+ closedir(dir);
+ }
+ return 0;
+}
+
+static int parent_add_child(struct udev_enumerate *enumerate, const char *path)
+{
+ struct udev_device *dev;
+
+ dev = udev_device_new_from_syspath(enumerate->udev, path);
+ if (dev == NULL)
+ return -ENODEV;
+
+ if (!match_subsystem(enumerate, udev_device_get_subsystem(dev)))
+ return 0;
+ if (!match_sysname(enumerate, udev_device_get_sysname(dev)))
+ return 0;
+ if (!match_property(enumerate, dev))
+ return 0;
+ if (!match_sysattr(enumerate, dev))
+ return 0;
+
+ syspath_add(enumerate, udev_device_get_syspath(dev));
+ udev_device_unref(dev);
+ return 1;
+}
+
+static int parent_crawl_children(struct udev_enumerate *enumerate, const char *path, int maxdepth)
+{
+ DIR *d;
+ struct dirent *dent;
+
+ d = opendir(path);
+ if (d == NULL)
+ return -errno;
+
+ for (dent = readdir(d); dent != NULL; dent = readdir(d)) {
+ char *child;
+
+ if (dent->d_name[0] == '.')
+ continue;
+ if (dent->d_type != DT_DIR)
+ continue;
+ if (asprintf(&child, "%s/%s", path, dent->d_name) < 0)
+ continue;
+ parent_add_child(enumerate, child);
+ if (maxdepth > 0)
+ parent_crawl_children(enumerate, child, maxdepth-1);
+ free(child);
+ }
+
+ closedir(d);
+ return 0;
+}
+
+static int scan_devices_all(struct udev_enumerate *udev_enumerate)
+{
+ struct udev *udev = udev_enumerate_get_udev(udev_enumerate);
+ char base[UTIL_PATH_SIZE];
+ struct stat statbuf;
+
+ util_strscpyl(base, sizeof(base), udev_get_sys_path(udev), "/subsystem", NULL);
+ if (stat(base, &statbuf) == 0) {
+ /* we have /subsystem/, forget all the old stuff */
+ dbg(udev, "searching '/subsystem/*/devices/*' dir\n");
+ scan_dir(udev_enumerate, "subsystem", "devices", NULL);
} else {
- util_strscpyl(base, sizeof(base), udev_get_sys_path(udev), "/subsystem", NULL);
- if (stat(base, &statbuf) == 0) {
- /* we have /subsystem/, forget all the old stuff */
- dbg(udev, "searching '/subsystem/*/devices/*' dir\n");
- scan_dir(udev_enumerate, "subsystem", "devices", NULL);
- } else {
dbg(udev, "searching '/bus/*/devices/*' dir\n");
- scan_dir(udev_enumerate, "bus", "devices", NULL);
- dbg(udev, "searching '/class/*' dir\n");
- scan_dir(udev_enumerate, "class", NULL, NULL);
- }
+ scan_dir(udev_enumerate, "bus", "devices", NULL);
+ dbg(udev, "searching '/class/*' dir\n");
+ scan_dir(udev_enumerate, "class", NULL, NULL);
}
-
return 0;
}
+/**
+ * udev_enumerate_scan_devices:
+ * @udev_enumerate: udev enumeration context
+ *
+ * Returns: 0 on success, otherwise a negative error value.
+ **/
+UDEV_EXPORT int udev_enumerate_scan_devices(struct udev_enumerate *udev_enumerate)
+{
+ if (udev_enumerate == NULL)
+ return -EINVAL;
+
+ if (udev_list_get_entry(&udev_enumerate->tags_match_list) != NULL)
+ return scan_devices_tags(udev_enumerate);
+
+ if (udev_enumerate->parent_match != NULL)
+ return parent_crawl_children(udev_enumerate, udev_device_get_syspath(udev_enumerate->parent_match), 256);
+
+ return scan_devices_all(udev_enumerate);
+}
+
/**
* udev_enumerate_scan_subsystems:
* @udev_enumerate: udev enumeration context
if (udev_enumerate == NULL)
return -EINVAL;
+ /* all kernel modules */
+ if (match_subsystem(udev_enumerate, "module")) {
+ dbg(udev, "searching '%s/modules/*' dir\n", subsysdir);
+ scan_dir_and_add_devices(udev_enumerate, "module", NULL, NULL);
+ }
+
util_strscpyl(base, sizeof(base), udev_get_sys_path(udev), "/subsystem", NULL);
if (stat(base, &statbuf) == 0)
subsysdir = "subsystem";
else
subsysdir = "bus";
+
+ /* all subsystems (only buses support coldplug) */
if (match_subsystem(udev_enumerate, "subsystem")) {
dbg(udev, "searching '%s/*' dir\n", subsysdir);
scan_dir_and_add_devices(udev_enumerate, subsysdir, NULL, NULL);
}
+
+ /* all subsystem drivers */
if (match_subsystem(udev_enumerate, "drivers")) {
dbg(udev, "searching '%s/*/drivers/*' dir\n", subsysdir);
scan_dir(udev_enumerate, subsysdir, "drivers", "drivers");
~ianmdlvl / elogind.git / blobdiff