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"
27 #define DBG(fmt, args...) pb_log("DBG: " fmt, ## args)
28 #define DBGS(fmt, args...) \
29 pb_log("DBG:%s:%d: " fmt, __func__, __LINE__, ## args)
31 #define DBG(fmt, args...)
32 #define DBGS(fmt, args...)
37 struct udev_monitor *monitor;
38 struct device_handler *handler;
41 static int udev_destructor(void *p)
43 struct pb_udev *udev = p;
45 udev_monitor_unref(udev->monitor);
48 udev_unref(udev->udev);
54 static void udev_setup_device_params(struct udev_device *udev,
55 struct discover_device *dev)
57 struct udev_list_entry *list, *entry;
59 list = udev_device_get_properties_list_entry(udev);
63 udev_list_entry_foreach(entry, list)
64 discover_device_set_param(dev,
65 udev_list_entry_get_name(entry),
66 udev_list_entry_get_value(entry));
69 static int udev_handle_dev_add(struct pb_udev *udev, struct udev_device *dev)
71 struct discover_device *ddev;
78 name = udev_device_get_sysname(dev);
80 pb_debug("udev_device_get_sysname failed\n");
84 typestr = udev_device_get_devtype(dev);
86 pb_debug("udev_device_get_devtype failed\n");
90 if (!(!strcmp(typestr, "disk") || !strcmp(typestr, "partition"))) {
91 pb_debug("SKIP %s: invalid type %s\n", name, typestr);
95 path = udev_device_get_devpath(dev);
96 if (path && (strstr(path, "virtual/block/loop")
97 || strstr(path, "virtual/block/ram"))) {
98 pb_debug("SKIP: %s: ignored (path=%s)\n", name, path);
102 /* We have enough info to create the device and start discovery */
103 ddev = device_lookup_by_id(udev->handler, name);
105 pb_debug("device %s is already present?\n", name);
109 /* we may also see multipath devices; same dev nodes (hence id), but
110 * different serial numbers */
111 serial = udev_device_get_property_value(dev, "ID_SERIAL");
112 if (serial && device_lookup_by_serial(udev->handler, serial))
115 ddev = discover_device_create(udev->handler, name);
117 ddev->device_path = udev_device_get_devnode(dev);
118 prop = udev_device_get_property_value(dev, "ID_FS_UUID");
120 ddev->uuid = talloc_strdup(ddev, prop);
121 prop = udev_device_get_property_value(dev, "ID_FS_LABEL");
123 ddev->label = talloc_strdup(ddev, prop);
124 ddev->device->type = DEVICE_TYPE_DISK;
126 udev_setup_device_params(dev, ddev);
128 device_handler_discover(udev->handler, ddev, CONF_METHOD_LOCAL_FILE);
133 static int udev_handle_dev_remove(struct pb_udev *udev, struct udev_device *dev)
135 struct discover_device *ddev;
138 name = udev_device_get_sysname(dev);
140 pb_debug("udev_device_get_sysname failed\n");
144 ddev = device_lookup_by_id(udev->handler, name);
148 device_handler_remove(udev->handler, ddev);
152 static int udev_handle_dev_action(struct udev_device *dev, const char *action)
154 struct pb_udev *udev = udev_get_userdata(udev_device_get_udev(dev));
156 if (!strcmp(action, "add"))
157 return udev_handle_dev_add(udev, dev);
159 else if (!strcmp(action, "remove"))
160 return udev_handle_dev_remove(udev, dev);
165 static int udev_enumerate(struct udev *udev)
168 struct udev_list_entry *list, *entry;
169 struct udev_enumerate *enumerate;
171 enumerate = udev_enumerate_new(udev);
174 pb_log("udev_enumerate_new failed\n");
178 result = udev_enumerate_add_match_subsystem(enumerate, "block");
181 pb_log("udev_enumerate_add_match_subsystem failed\n");
185 udev_enumerate_scan_devices(enumerate);
187 list = udev_enumerate_get_list_entry(enumerate);
190 pb_log("udev_enumerate_get_list_entry failed\n");
194 udev_list_entry_foreach(entry, list) {
196 struct udev_device *dev;
198 syspath = udev_list_entry_get_name(entry);
199 dev = udev_device_new_from_syspath(udev, syspath);
201 udev_handle_dev_action(dev, "add");
203 udev_device_unref(dev);
206 udev_enumerate_unref(enumerate);
210 udev_enumerate_unref(enumerate);
214 static int udev_setup_monitor(struct udev *udev, struct udev_monitor **monitor)
217 struct udev_monitor *m;
220 m = udev_monitor_new_from_netlink(udev, "udev");
223 pb_log("udev_monitor_new_from_netlink failed\n");
227 result = udev_monitor_filter_add_match_subsystem_devtype(m, "block",
231 pb_log("udev_monitor_filter_add_match_subsystem_devtype failed\n");
235 result = udev_monitor_enable_receiving(m);
238 pb_log("udev_monitor_enable_receiving failed\n");
246 udev_monitor_unref(m);
251 * udev_process - waiter callback for monitor netlink.
254 static int udev_process(void *arg)
256 struct udev_monitor *monitor = arg;
257 struct udev_device *dev;
261 dev = udev_monitor_receive_device(monitor);
264 pb_log("udev_monitor_receive_device failed\n");
268 action = udev_device_get_action(dev);
271 pb_log("udev_device_get_action failed\n");
275 result = udev_handle_dev_action(dev, action);
277 udev_device_unref(dev);
281 udev_device_unref(dev);
285 static void udev_log_fn(struct udev __attribute__((unused)) *udev,
286 int __attribute__((unused)) priority, const char *file, int line,
287 const char *fn, const char *format, va_list args)
289 pb_log("libudev: %s %s:%d: ", fn, file, line);
290 vfprintf(pb_log_get_stream(), format, args);
293 struct pb_udev *udev_init(struct waitset *waitset,
294 struct device_handler *handler)
297 struct pb_udev *udev = talloc(NULL, struct pb_udev);
299 talloc_set_destructor(udev, udev_destructor);
300 udev->handler = handler;
302 udev->udev = udev_new();
305 pb_log("udev_new failed\n");
309 udev_set_userdata(udev->udev, udev);
311 udev_set_log_fn(udev->udev, udev_log_fn);
313 result = udev_enumerate(udev->udev);
318 result = udev_setup_monitor(udev->udev, &udev->monitor);
323 waiter_register_io(waitset, udev_monitor_get_fd(udev->monitor), WAIT_IN,
324 udev_process, udev->monitor);
326 pb_log("%s: waiting on udev\n", __func__);
332 udev_unref(udev->udev);
338 void udev_destroy(struct pb_udev *udev)