11 #include <sys/socket.h>
12 #include <sys/types.h>
16 #include <types/types.h>
17 #include <talloc/talloc.h>
18 #include <waiter/waiter.h>
19 #include <system/system.h>
23 #include "pb-discover.h"
24 #include "device-handler.h"
28 struct udev_monitor *monitor;
29 struct device_handler *handler;
32 static int udev_destructor(void *p)
34 struct pb_udev *udev = p;
36 udev_monitor_unref(udev->monitor);
39 udev_unref(udev->udev);
45 static void udev_setup_device_params(struct udev_device *udev,
46 struct discover_device *dev)
48 struct udev_list_entry *list, *entry;
50 list = udev_device_get_properties_list_entry(udev);
54 udev_list_entry_foreach(entry, list)
55 discover_device_set_param(dev,
56 udev_list_entry_get_name(entry),
57 udev_list_entry_get_value(entry));
60 static int udev_handle_dev_add(struct pb_udev *udev, struct udev_device *dev)
62 struct discover_device *ddev;
69 name = udev_device_get_sysname(dev);
71 pb_debug("udev_device_get_sysname failed\n");
75 typestr = udev_device_get_devtype(dev);
77 pb_debug("udev_device_get_devtype failed\n");
81 if (!(!strcmp(typestr, "disk") || !strcmp(typestr, "partition"))) {
82 pb_debug("SKIP %s: invalid type %s\n", name, typestr);
86 path = udev_device_get_devpath(dev);
87 if (path && (strstr(path, "virtual/block/loop")
88 || strstr(path, "virtual/block/ram"))) {
89 pb_debug("SKIP: %s: ignored (path=%s)\n", name, path);
93 /* We have enough info to create the device and start discovery */
94 ddev = device_lookup_by_id(udev->handler, name);
96 pb_debug("device %s is already present?\n", name);
100 /* we may also see multipath devices; same dev nodes (hence id), but
101 * different serial numbers */
102 serial = udev_device_get_property_value(dev, "ID_SERIAL");
103 if (serial && device_lookup_by_serial(udev->handler, serial))
106 ddev = discover_device_create(udev->handler, name);
108 ddev->device_path = udev_device_get_devnode(dev);
109 prop = udev_device_get_property_value(dev, "ID_FS_UUID");
111 ddev->uuid = talloc_strdup(ddev, prop);
112 prop = udev_device_get_property_value(dev, "ID_FS_LABEL");
114 ddev->label = talloc_strdup(ddev, prop);
115 ddev->device->type = DEVICE_TYPE_DISK;
117 udev_setup_device_params(dev, ddev);
119 device_handler_discover(udev->handler, ddev, CONF_METHOD_LOCAL_FILE);
124 static int udev_handle_dev_remove(struct pb_udev *udev, struct udev_device *dev)
126 struct discover_device *ddev;
129 name = udev_device_get_sysname(dev);
131 pb_debug("udev_device_get_sysname failed\n");
135 ddev = device_lookup_by_id(udev->handler, name);
139 device_handler_remove(udev->handler, ddev);
143 static int udev_handle_dev_action(struct udev_device *dev, const char *action)
145 struct pb_udev *udev = udev_get_userdata(udev_device_get_udev(dev));
147 if (!strcmp(action, "add"))
148 return udev_handle_dev_add(udev, dev);
150 else if (!strcmp(action, "remove"))
151 return udev_handle_dev_remove(udev, dev);
156 static int udev_enumerate(struct udev *udev)
159 struct udev_list_entry *list, *entry;
160 struct udev_enumerate *enumerate;
162 enumerate = udev_enumerate_new(udev);
165 pb_log("udev_enumerate_new failed\n");
169 result = udev_enumerate_add_match_subsystem(enumerate, "block");
172 pb_log("udev_enumerate_add_match_subsystem failed\n");
176 udev_enumerate_scan_devices(enumerate);
178 list = udev_enumerate_get_list_entry(enumerate);
181 pb_log("udev_enumerate_get_list_entry failed\n");
185 udev_list_entry_foreach(entry, list) {
187 struct udev_device *dev;
189 syspath = udev_list_entry_get_name(entry);
190 dev = udev_device_new_from_syspath(udev, syspath);
192 udev_handle_dev_action(dev, "add");
194 udev_device_unref(dev);
197 udev_enumerate_unref(enumerate);
201 udev_enumerate_unref(enumerate);
205 static int udev_setup_monitor(struct udev *udev, struct udev_monitor **monitor)
208 struct udev_monitor *m;
211 m = udev_monitor_new_from_netlink(udev, "udev");
214 pb_log("udev_monitor_new_from_netlink failed\n");
218 result = udev_monitor_filter_add_match_subsystem_devtype(m, "block",
222 pb_log("udev_monitor_filter_add_match_subsystem_devtype failed\n");
226 result = udev_monitor_enable_receiving(m);
229 pb_log("udev_monitor_enable_receiving failed\n");
237 udev_monitor_unref(m);
242 * udev_process - waiter callback for monitor netlink.
245 static int udev_process(void *arg)
247 struct udev_monitor *monitor = arg;
248 struct udev_device *dev;
252 dev = udev_monitor_receive_device(monitor);
255 pb_log("udev_monitor_receive_device failed\n");
259 action = udev_device_get_action(dev);
262 pb_log("udev_device_get_action failed\n");
266 result = udev_handle_dev_action(dev, action);
268 udev_device_unref(dev);
272 udev_device_unref(dev);
276 static void udev_log_fn(struct udev __attribute__((unused)) *udev,
277 int __attribute__((unused)) priority, const char *file, int line,
278 const char *fn, const char *format, va_list args)
280 pb_log("libudev: %s %s:%d: ", fn, file, line);
281 vfprintf(pb_log_get_stream(), format, args);
284 struct pb_udev *udev_init(struct waitset *waitset,
285 struct device_handler *handler)
288 struct pb_udev *udev = talloc(NULL, struct pb_udev);
290 talloc_set_destructor(udev, udev_destructor);
291 udev->handler = handler;
293 udev->udev = udev_new();
296 pb_log("udev_new failed\n");
300 udev_set_userdata(udev->udev, udev);
302 udev_set_log_fn(udev->udev, udev_log_fn);
304 result = udev_enumerate(udev->udev);
309 result = udev_setup_monitor(udev->udev, &udev->monitor);
314 waiter_register_io(waitset, udev_monitor_get_fd(udev->monitor), WAIT_IN,
315 udev_process, udev->monitor);
317 pb_debug("%s: waiting on udev\n", __func__);
323 udev_unref(udev->udev);
329 void udev_destroy(struct pb_udev *udev)