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 = talloc_strdup(ddev, udev_device_get_devnode(dev));
110 prop = udev_device_get_property_value(dev, "ID_FS_UUID");
112 ddev->uuid = talloc_strdup(ddev, prop);
113 prop = udev_device_get_property_value(dev, "ID_FS_LABEL");
115 ddev->label = talloc_strdup(ddev, prop);
116 ddev->device->type = DEVICE_TYPE_DISK;
118 udev_setup_device_params(dev, ddev);
120 device_handler_discover(udev->handler, ddev);
125 static int udev_handle_dev_remove(struct pb_udev *udev, struct udev_device *dev)
127 struct discover_device *ddev;
130 name = udev_device_get_sysname(dev);
132 pb_debug("udev_device_get_sysname failed\n");
136 ddev = device_lookup_by_id(udev->handler, name);
140 device_handler_remove(udev->handler, ddev);
144 static int udev_handle_dev_action(struct udev_device *dev, const char *action)
146 struct pb_udev *udev = udev_get_userdata(udev_device_get_udev(dev));
148 if (!strcmp(action, "add"))
149 return udev_handle_dev_add(udev, dev);
151 else if (!strcmp(action, "remove"))
152 return udev_handle_dev_remove(udev, dev);
157 static int udev_enumerate(struct udev *udev)
160 struct udev_list_entry *list, *entry;
161 struct udev_enumerate *enumerate;
163 enumerate = udev_enumerate_new(udev);
166 pb_log("udev_enumerate_new failed\n");
170 result = udev_enumerate_add_match_subsystem(enumerate, "block");
173 pb_log("udev_enumerate_add_match_subsystem failed\n");
177 udev_enumerate_scan_devices(enumerate);
179 list = udev_enumerate_get_list_entry(enumerate);
182 pb_log("udev_enumerate_get_list_entry failed\n");
186 udev_list_entry_foreach(entry, list) {
188 struct udev_device *dev;
190 syspath = udev_list_entry_get_name(entry);
191 dev = udev_device_new_from_syspath(udev, syspath);
193 udev_handle_dev_action(dev, "add");
195 udev_device_unref(dev);
198 udev_enumerate_unref(enumerate);
202 udev_enumerate_unref(enumerate);
206 static int udev_setup_monitor(struct udev *udev, struct udev_monitor **monitor)
209 struct udev_monitor *m;
212 m = udev_monitor_new_from_netlink(udev, "udev");
215 pb_log("udev_monitor_new_from_netlink failed\n");
219 result = udev_monitor_filter_add_match_subsystem_devtype(m, "block",
223 pb_log("udev_monitor_filter_add_match_subsystem_devtype failed\n");
227 result = udev_monitor_enable_receiving(m);
230 pb_log("udev_monitor_enable_receiving failed\n");
238 udev_monitor_unref(m);
243 * udev_process - waiter callback for monitor netlink.
246 static int udev_process(void *arg)
248 struct udev_monitor *monitor = arg;
249 struct udev_device *dev;
253 dev = udev_monitor_receive_device(monitor);
256 pb_log("udev_monitor_receive_device failed\n");
260 action = udev_device_get_action(dev);
263 pb_log("udev_device_get_action failed\n");
267 result = udev_handle_dev_action(dev, action);
269 udev_device_unref(dev);
273 udev_device_unref(dev);
277 static void udev_log_fn(struct udev __attribute__((unused)) *udev,
278 int __attribute__((unused)) priority, const char *file, int line,
279 const char *fn, const char *format, va_list args)
281 pb_log("libudev: %s %s:%d: ", fn, file, line);
282 vfprintf(pb_log_get_stream(), format, args);
285 struct pb_udev *udev_init(struct waitset *waitset,
286 struct device_handler *handler)
289 struct pb_udev *udev = talloc(NULL, struct pb_udev);
291 talloc_set_destructor(udev, udev_destructor);
292 udev->handler = handler;
294 udev->udev = udev_new();
297 pb_log("udev_new failed\n");
301 udev_set_userdata(udev->udev, udev);
303 udev_set_log_fn(udev->udev, udev_log_fn);
305 result = udev_enumerate(udev->udev);
310 result = udev_setup_monitor(udev->udev, &udev->monitor);
315 waiter_register_io(waitset, udev_monitor_get_fd(udev->monitor), WAIT_IN,
316 udev_process, udev->monitor);
318 pb_debug("%s: waiting on udev\n", __func__);
324 udev_unref(udev->udev);
330 void udev_destroy(struct pb_udev *udev)