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;
77 name = udev_device_get_sysname(dev);
79 pb_debug("udev_device_get_sysname failed\n");
83 typestr = udev_device_get_devtype(dev);
85 pb_debug("udev_device_get_devtype failed\n");
89 if (!(!strcmp(typestr, "disk") || !strcmp(typestr, "partition"))) {
90 pb_debug("SKIP %s: invalid type %s\n", name, typestr);
94 path = udev_device_get_devpath(dev);
95 if (path && (strstr(path, "virtual/block/loop")
96 || strstr(path, "virtual/block/ram"))) {
97 pb_debug("SKIP: %s: ignored (path=%s)\n", name, path);
101 /* We have enough info to create the device and start discovery */
102 ddev = device_lookup_by_id(udev->handler, name);
104 pb_debug("device %s is already present?\n", name);
108 /* we may also see multipath devices; same dev nodes (hence id), but
109 * different serial numbers */
110 serial = udev_device_get_property_value(dev, "ID_SERIAL");
111 if (serial && device_lookup_by_serial(udev->handler, serial))
114 ddev = discover_device_create(udev->handler, name);
116 ddev->device_path = udev_device_get_devnode(dev);
117 ddev->uuid = udev_device_get_property_value(dev, "ID_FS_UUID");
118 ddev->label = udev_device_get_property_value(dev, "ID_FS_LABEL");
119 ddev->device->type = DEVICE_TYPE_DISK;
121 udev_setup_device_params(dev, ddev);
123 device_handler_discover(udev->handler, ddev, CONF_METHOD_LOCAL_FILE);
128 static int udev_handle_dev_remove(struct pb_udev *udev, struct udev_device *dev)
130 struct discover_device *ddev;
133 name = udev_device_get_sysname(dev);
135 pb_debug("udev_device_get_sysname failed\n");
139 ddev = device_lookup_by_id(udev->handler, name);
143 device_handler_remove(udev->handler, ddev);
147 static int udev_handle_dev_action(struct udev_device *dev, const char *action)
149 struct pb_udev *udev = udev_get_userdata(udev_device_get_udev(dev));
151 if (!strcmp(action, "add"))
152 return udev_handle_dev_add(udev, dev);
154 else if (!strcmp(action, "remove"))
155 return udev_handle_dev_remove(udev, dev);
160 static int udev_enumerate(struct udev *udev)
163 struct udev_list_entry *list, *entry;
164 struct udev_enumerate *enumerate;
166 enumerate = udev_enumerate_new(udev);
169 pb_log("udev_enumerate_new failed\n");
173 result = udev_enumerate_add_match_subsystem(enumerate, "block");
176 pb_log("udev_enumerate_add_match_subsystem failed\n");
180 udev_enumerate_scan_devices(enumerate);
182 list = udev_enumerate_get_list_entry(enumerate);
185 pb_log("udev_enumerate_get_list_entry failed\n");
189 udev_list_entry_foreach(entry, list) {
191 struct udev_device *dev;
193 syspath = udev_list_entry_get_name(entry);
194 dev = udev_device_new_from_syspath(udev, syspath);
196 udev_handle_dev_action(dev, "add");
198 udev_device_unref(dev);
201 udev_enumerate_unref(enumerate);
205 udev_enumerate_unref(enumerate);
209 static int udev_setup_monitor(struct udev *udev, struct udev_monitor **monitor)
212 struct udev_monitor *m;
215 m = udev_monitor_new_from_netlink(udev, "udev");
218 pb_log("udev_monitor_new_from_netlink failed\n");
222 result = udev_monitor_filter_add_match_subsystem_devtype(m, "block",
226 pb_log("udev_monitor_filter_add_match_subsystem_devtype failed\n");
230 result = udev_monitor_enable_receiving(m);
233 pb_log("udev_monitor_enable_receiving failed\n");
241 udev_monitor_unref(m);
246 * udev_process - waiter callback for monitor netlink.
249 static int udev_process(void *arg)
251 struct udev_monitor *monitor = arg;
252 struct udev_device *dev;
256 dev = udev_monitor_receive_device(monitor);
259 pb_log("udev_monitor_receive_device failed\n");
263 action = udev_device_get_action(dev);
266 pb_log("udev_device_get_action failed\n");
270 result = udev_handle_dev_action(dev, action);
272 udev_device_unref(dev);
276 udev_device_unref(dev);
280 static void udev_log_fn(struct udev __attribute__((unused)) *udev,
281 int __attribute__((unused)) priority, const char *file, int line,
282 const char *fn, const char *format, va_list args)
284 pb_log("libudev: %s %s:%d: ", fn, file, line);
285 vfprintf(pb_log_get_stream(), format, args);
288 struct pb_udev *udev_init(struct waitset *waitset,
289 struct device_handler *handler)
292 struct pb_udev *udev = talloc(NULL, struct pb_udev);
294 talloc_set_destructor(udev, udev_destructor);
295 udev->handler = handler;
297 udev->udev = udev_new();
300 pb_log("udev_new failed\n");
304 udev_set_userdata(udev->udev, udev);
306 udev_set_log_fn(udev->udev, udev_log_fn);
308 result = udev_enumerate(udev->udev);
313 result = udev_setup_monitor(udev->udev, &udev->monitor);
318 waiter_register_io(waitset, udev_monitor_get_fd(udev->monitor), WAIT_IN,
319 udev_process, udev->monitor);
321 pb_log("%s: waiting on udev\n", __func__);
327 udev_unref(udev->udev);
333 void udev_destroy(struct pb_udev *udev)