-#define _GNU_SOURCE
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
#include <assert.h>
#include <errno.h>
#include <sys/un.h>
#include <log/log.h>
+#include <types/types.h>
#include <talloc/talloc.h>
#include <waiter/waiter.h>
#include <system/system.h>
#include "udev.h"
#include "pb-discover.h"
#include "device-handler.h"
+#include "cdrom.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
+/* We set a default monitor buffer size, as we may not process monitor
+ * events while performing device discvoery. systemd uses a 128M buffer, so
+ * we'll do the same here */
+static const int monitor_bufsize = 128 * 1024 * 1024;
struct pb_udev {
struct udev *udev;
return 0;
}
-static void print_device_properties(struct udev_device *dev)
+static void udev_setup_device_params(struct udev_device *udev,
+ struct discover_device *dev)
{
struct udev_list_entry *list, *entry;
- assert(dev);
-
- if (1) {
- list = udev_device_get_properties_list_entry(dev);
-
- assert(list);
+ list = udev_device_get_properties_list_entry(udev);
+ if (!list)
+ return;
- udev_list_entry_foreach(entry, list)
- DBG("property: %s - %s\n",
+ udev_list_entry_foreach(entry, list)
+ discover_device_set_param(dev,
udev_list_entry_get_name(entry),
- udev_device_get_property_value(dev,
- udev_list_entry_get_name(entry)));
- }
+ udev_list_entry_get_value(entry));
}
-static int udev_handle_dev_action(struct udev_device *dev, const char *action)
+static int udev_handle_block_add(struct pb_udev *udev, struct udev_device *dev,
+ const char *name)
{
- const char *devtype;
- const char *devpath;
- const char *devnode;
- struct pb_udev *udev;
- struct event *event;
- enum event_action eva = 0;
+ struct discover_device *ddev;
+ const char *typestr;
+ const char *uuid;
+ const char *path;
+ const char *node;
+ const char *prop;
+ const char *type;
+ bool cdrom;
+
+ typestr = udev_device_get_devtype(dev);
+ if (!typestr) {
+ pb_debug("udev_device_get_devtype failed\n");
+ return -1;
+ }
- assert(dev);
- assert(action);
+ if (!(!strcmp(typestr, "disk") || !strcmp(typestr, "partition"))) {
+ pb_log("SKIP %s: invalid type %s\n", name, typestr);
+ return 0;
+ }
- devtype = udev_device_get_devtype(dev); /* DEVTYPE */
+ node = udev_device_get_devnode(dev);
+ path = udev_device_get_devpath(dev);
+ if (path && (strstr(path, "virtual/block/loop")
+ || strstr(path, "virtual/block/ram"))) {
+ pb_log("SKIP: %s: ignored (path=%s)\n", name, path);
+ return 0;
+ }
- if (!devtype) {
- pb_log("udev_device_get_devtype failed\n");
- 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_log("SKIP: %s: no media present\n", name);
+ return 0;
+ }
+ }
+
+ type = udev_device_get_property_value(dev, "ID_FS_TYPE");
+ if (!type) {
+ pb_log("SKIP: %s: no ID_FS_TYPE property\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 0;
+ }
}
- devpath = udev_device_get_devpath(dev); /* DEVPATH */
+ ddev = discover_device_create(udev->handler, name);
+
+ 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);
+
+ return 0;
+}
+
+static int udev_handle_dev_add(struct pb_udev *udev, struct udev_device *dev)
+{
+ const char *subsys;
+ const char *name;
- if (!devpath) {
- pb_log("udev_device_get_devpath failed\n");
+ name = udev_device_get_sysname(dev);
+ if (!name) {
+ pb_debug("udev_device_get_sysname failed\n");
return -1;
}
- devnode = udev_device_get_devnode(dev); /* DEVNAME */
+ subsys = udev_device_get_subsystem(dev);
+ if (!subsys) {
+ pb_debug("udev_device_get_subsystem failed\n");
+ return -1;
+ }
- if (!devnode) {
- pb_log("udev_device_get_devnode failed\n");
+ if (device_lookup_by_id(udev->handler, name)) {
+ pb_debug("device %s is already present?\n", name);
return -1;
}
- /* Ignore non disk or partition, ram, loop. */
+ if (!strcmp(subsys, "block")) {
+ return udev_handle_block_add(udev, dev, name);
+ }
- if (!(strstr(devtype, "disk") || strstr(devtype, "partition"))
- || strstr(devpath, "virtual/block/loop")
- || strstr(devpath, "virtual/block/ram")) {
- pb_log("SKIP: %s - %s\n", devtype, devnode);
- return 0;
+ pb_log("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;
+ const char *name;
+
+ name = udev_device_get_sysname(dev);
+ if (!name) {
+ pb_debug("udev_device_get_sysname failed\n");
+ return -1;
}
- if (!strcmp(action, "add")) {
- pb_log("ADD: %s - %s\n", devtype, devnode);
- eva = EVENT_ACTION_ADD;
- } else if (!strcmp(action, "remove")) {
- pb_log("REMOVE: %s - %s\n", devtype, devnode);
- eva = EVENT_ACTION_REMOVE;
- } else {
- pb_log("SKIP: %s: %s - %s\n", action, devtype, devnode);
+ ddev = device_lookup_by_id(udev->handler, name);
+ if (!ddev)
return 0;
+
+ device_handler_remove(udev->handler, 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;
}
- print_device_properties(dev);
+ 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;
+ }
- event = talloc(NULL, struct event);
+ return false;
+}
- event->type = EVENT_TYPE_UDEV;
- event->action = eva;
- event->device = devpath;
+static int udev_handle_dev_change(struct pb_udev *udev, struct udev_device *dev)
+{
+ struct discover_device *ddev;
+ const char *name;
+ int rc = 0;
- event->n_params = 1;
- event->params = talloc(event, struct param);
- event->params->name = "DEVNAME";
- event->params->value = devnode;
+ name = udev_device_get_sysname(dev);
- udev = udev_get_userdata(udev_device_get_udev(dev));
- assert(udev);
+ ddev = device_lookup_by_id(udev->handler, name);
- device_handler_event(udev->handler, event);
+ /* 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));
+ struct udev_list_entry *list;
+ const char *name;
+
+ list = udev_device_get_properties_list_entry(dev);
+ name = udev_device_get_sysname(dev);
+
+ pb_debug("udev: action %s, device %s\n", action, name);
+ pb_debug("udev: properties:\n");
+
+ for (; list; list = udev_list_entry_get_next(list))
+ pb_debug("\t%-20s: %s\n", udev_list_entry_get_name(list),
+ udev_list_entry_get_value(list));
+
+ 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);
- talloc_free(event);
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);
goto out_err;
}
+ result = udev_monitor_set_receive_buffer_size(m, monitor_bufsize);
+ if (result) {
+ pb_log("udev_monitor_set_rx_bufsize(%d) failed\n",
+ monitor_bufsize);
+ }
+
result = udev_monitor_filter_add_match_subsystem_devtype(m, "block",
NULL);
struct udev_monitor *monitor = arg;
struct udev_device *dev;
const char *action;
- int result;
dev = udev_monitor_receive_device(monitor);
-
if (!dev) {
pb_log("udev_monitor_receive_device failed\n");
return -1;
if (!action) {
pb_log("udev_device_get_action failed\n");
- goto fail;
+ } else {
+ udev_handle_dev_action(dev, action);
}
- result = udev_handle_dev_action(dev, action);
-
udev_device_unref(dev);
- return result;
-
-fail:
- udev_device_unref(dev);
- return -1;
+ return 0;
}
static void udev_log_fn(struct udev __attribute__((unused)) *udev,
vfprintf(pb_log_get_stream(), format, args);
}
-struct pb_udev *udev_init(struct waitset *waitset,
- struct device_handler *handler)
+struct pb_udev *udev_init(struct device_handler *handler,
+ struct waitset *waitset)
{
+ struct pb_udev *udev;
int result;
- struct pb_udev *udev = talloc(NULL, struct pb_udev);
+ udev = talloc(handler, struct pb_udev);
talloc_set_destructor(udev, udev_destructor);
udev->handler = handler;
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;
- waiter_register(waitset, udev_monitor_get_fd(udev->monitor), WAIT_IN,
+ 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:
return NULL;
}
-void udev_destroy(struct pb_udev *udev)
+void udev_reinit(struct pb_udev *udev)
{
- talloc_free(udev);
+ pb_log("udev: reinit requested, starting enumeration\n");
+ udev_enumerate(udev->udev);
}
projects / petitboot / blobdiff