-#define _GNU_SOURCE
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
#include <assert.h>
#include <errno.h>
#include "udev.h"
#include "pb-discover.h"
#include "device-handler.h"
-
-#if defined(DEBUG)
-#define DBG(fmt, args...) pb_log("DBG: " fmt, ## args)
-#define DBGS(fmt, args...) \
- pb_log("DBG:%s:%d: " fmt, __func__, __LINE__, ## args)
-#else
-#define DBG(fmt, args...)
-#define DBGS(fmt, args...)
-#endif
+#include "cdrom.h"
struct pb_udev {
struct udev *udev;
udev_list_entry_get_value(entry));
}
-static int udev_handle_dev_add(struct pb_udev *udev, struct udev_device *dev)
+static int udev_handle_block_add(struct pb_udev *udev, struct udev_device *dev,
+ const char *name)
{
struct discover_device *ddev;
const char *typestr;
+ const char *uuid;
const char *path;
- const char *name;
-
- name = udev_device_get_sysname(dev);
- if (!name) {
- pb_debug("udev_device_get_sysname failed\n");
- return -1;
- }
+ const char *node;
+ const char *prop;
+ bool cdrom;
typestr = udev_device_get_devtype(dev);
if (!typestr) {
return 0;
}
+ node = udev_device_get_devnode(dev);
path = udev_device_get_devpath(dev);
if (path && (strstr(path, "virtual/block/loop")
|| strstr(path, "virtual/block/ram"))) {
return 0;
}
- /* We have enough info to create the device and start discovery */
- ddev = device_lookup_by_id(udev->handler, name);
- if (ddev) {
- pb_debug("device %s is already present?\n", name);
- return -1;
+ cdrom = node && !!udev_device_get_property_value(dev, "ID_CDROM");
+ if (cdrom) {
+ /* CDROMs require a little initialisation, to get
+ * petitboot-compatible tray behaviour */
+ cdrom_init(node);
+ if (!cdrom_media_present(node)) {
+ pb_debug("SKIP: %s: no media present\n", name);
+ return 0;
+ }
+ }
+
+
+ /* We may see multipath devices; they'll have the same uuid as an
+ * existing device, so only parse the first. */
+ uuid = udev_device_get_property_value(dev, "ID_FS_UUID");
+ if (uuid) {
+ ddev = device_lookup_by_uuid(udev->handler, uuid);
+ if (ddev) {
+ pb_log("SKIP: %s UUID [%s] already present (as %s)\n",
+ name, uuid, ddev->device->id);
+ return -1;
+ }
}
ddev = discover_device_create(udev->handler, name);
- ddev->device_path = udev_device_get_devnode(dev);
- ddev->uuid = udev_device_get_property_value(dev, "ID_FS_UUID");
- ddev->label = udev_device_get_property_value(dev, "ID_FS_LABEL");
- ddev->device->type = DEVICE_TYPE_DISK;
+ ddev->device_path = talloc_strdup(ddev, node);
+
+ if (uuid)
+ ddev->uuid = talloc_strdup(ddev, uuid);
+ prop = udev_device_get_property_value(dev, "ID_FS_LABEL");
+ if (prop)
+ ddev->label = talloc_strdup(ddev, prop);
+ ddev->device->type = cdrom ? DEVICE_TYPE_OPTICAL : DEVICE_TYPE_DISK;
udev_setup_device_params(dev, ddev);
- device_handler_discover(udev->handler, ddev, CONF_METHOD_LOCAL_FILE);
+ device_handler_discover(udev->handler, ddev);
return 0;
}
+static int udev_handle_dev_add(struct pb_udev *udev, struct udev_device *dev)
+{
+ const char *subsys;
+ const char *name;
+
+ name = udev_device_get_sysname(dev);
+ if (!name) {
+ pb_debug("udev_device_get_sysname failed\n");
+ return -1;
+ }
+
+ subsys = udev_device_get_subsystem(dev);
+ if (!subsys) {
+ pb_debug("udev_device_get_subsystem failed\n");
+ return -1;
+ }
+
+ if (device_lookup_by_id(udev->handler, name)) {
+ pb_debug("device %s is already present?\n", name);
+ return -1;
+ }
+
+ if (!strcmp(subsys, "block")) {
+ return udev_handle_block_add(udev, dev, name);
+ }
+
+ pb_debug("SKIP %s: unknown subsystem %s\n", name, subsys);
+ return -1;
+}
+
+
static int udev_handle_dev_remove(struct pb_udev *udev, struct udev_device *dev)
{
struct discover_device *ddev;
return 0;
}
+
+/* returns true if further event processing should stop (eg., we've
+ * ejected the cdrom)
+ */
+static bool udev_handle_cdrom_events(struct pb_udev *udev,
+ struct udev_device *dev, struct discover_device *ddev)
+{
+ const char *node;
+
+ node = udev_device_get_devnode(dev);
+
+ /* handle CDROM eject requests */
+ if (udev_device_get_property_value(dev, "DISK_EJECT_REQUEST")) {
+ bool eject = false;
+
+ pb_debug("udev: eject request\n");
+
+ /* If the device is mounted, cdrom_id's own eject request may
+ * have failed. So, we'll need to do our own here.
+ */
+ if (ddev) {
+ eject = ddev->mounted;
+ udev_handle_dev_remove(udev, dev);
+ return false;
+ }
+
+ if (eject)
+ cdrom_eject(node);
+
+ return true;
+ }
+
+ if (udev_device_get_property_value(dev, "DISK_MEDIA_CHANGE")) {
+ if (cdrom_media_present(node))
+ udev_handle_dev_add(udev, dev);
+ else
+ udev_handle_dev_remove(udev, dev);
+ return true;
+ }
+
+ return false;
+}
+
+static int udev_handle_dev_change(struct pb_udev *udev, struct udev_device *dev)
+{
+ struct discover_device *ddev;
+ const char *name;
+ int rc = 0;
+
+ name = udev_device_get_sysname(dev);
+
+ ddev = device_lookup_by_id(udev->handler, name);
+
+ /* if this is a CDROM device, process eject & media change requests;
+ * these may stop further processing */
+ if (!udev_device_get_property_value(dev, "ID_CDROM")) {
+ if (udev_handle_cdrom_events(udev, dev, ddev))
+ return 0;
+ }
+
+ /* if this is a new device, treat it as an add */
+ if (!ddev)
+ rc = udev_handle_dev_add(udev, dev);
+
+ return rc;
+}
+
static int udev_handle_dev_action(struct udev_device *dev, const char *action)
{
struct pb_udev *udev = udev_get_userdata(udev_device_get_udev(dev));
+#ifdef DEBUG
+ {
+ struct udev_list_entry *list;
+ const char *name;
+
+ list = udev_device_get_properties_list_entry(dev);
+ name = udev_device_get_sysname(dev);
+
+ pb_debug("%s: action %s, device %s\n", __func__, action, name);
+ pb_debug("%s properties:\n", __func__);
+
+ for (; list; list = udev_list_entry_get_next(list))
+ pb_log("\t%-20s: %s\n", udev_list_entry_get_name(list),
+ udev_list_entry_get_value(list));
+ } while (0);
+#endif
+
if (!strcmp(action, "add"))
return udev_handle_dev_add(udev, dev);
else if (!strcmp(action, "remove"))
return udev_handle_dev_remove(udev, dev);
+ else if (!strcmp(action, "change"))
+ return udev_handle_dev_change(udev, dev);
+
return 0;
}
}
result = udev_enumerate_add_match_subsystem(enumerate, "block");
-
if (result) {
pb_log("udev_enumerate_add_match_subsystem failed\n");
goto fail;
}
+ result = udev_enumerate_add_match_is_initialized(enumerate);
+ if (result) {
+ pb_log("udev_enumerate_add_match_is_initialised failed\n");
+ goto fail;
+ }
+
udev_enumerate_scan_devices(enumerate);
list = udev_enumerate_get_list_entry(enumerate);
udev_set_log_fn(udev->udev, udev_log_fn);
- result = udev_enumerate(udev->udev);
-
- if (result)
- goto fail_enumerate;
-
result = udev_setup_monitor(udev->udev, &udev->monitor);
-
if (result)
goto fail_monitor;
+ result = udev_enumerate(udev->udev);
+ if (result)
+ goto fail_enumerate;
+
waiter_register_io(waitset, udev_monitor_get_fd(udev->monitor), WAIT_IN,
udev_process, udev->monitor);
- pb_log("%s: waiting on udev\n", __func__);
+ pb_debug("%s: waiting on udev\n", __func__);
return udev;
fail_monitor:
+ udev_monitor_unref(udev->monitor);
fail_enumerate:
udev_unref(udev->udev);
fail_new:
projects / petitboot / blobdiff