core: split NMRfkillManager out of NMUdevManager

Split the rfkill-monitoring parts of NMUdevManager into a separate
class. Now NMUdevManager only handles device enumeration.

1 files changed, 422 insertions, 0 deletions

diff --git a/src/nm-rfkill-manager.c b/src/nm-rfkill-manager.c
new file mode 100644
index 0000000000..b02f85f549
--- /dev/null
+++ b/src/nm-rfkill-manager.c
@@ -0,0 +1,422 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/* NetworkManager -- Network link manager
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright (C) 2009 - 2013 Red Hat, Inc.
+ */
+
+#include <config.h>
+
+#include <string.h>
+#include <gudev/gudev.h>
+
+#include "nm-rfkill-manager.h"
+#include "nm-logging.h"
+
+typedef struct {
+	GUdevClient *client;
+
+	/* Authoritative rfkill state (RFKILL_* enum) */
+	RfKillState rfkill_states[RFKILL_TYPE_MAX];
+	GSList *killswitches;
+
+} NMRfkillManagerPrivate;
+
+#define NM_RFKILL_MANAGER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_RFKILL_MANAGER, NMRfkillManagerPrivate))
+
+G_DEFINE_TYPE (NMRfkillManager, nm_rfkill_manager, G_TYPE_OBJECT)
+
+enum {
+	RFKILL_CHANGED,
+
+	LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
+
+typedef struct {
+	char *name;
+	guint64 seqnum;
+	char *path;
+	char *driver;
+	RfKillType rtype;
+	gint state;
+	gboolean platform;
+} Killswitch;
+
+RfKillState
+nm_rfkill_manager_get_rfkill_state (NMRfkillManager *self, RfKillType rtype)
+{
+	g_return_val_if_fail (self != NULL, RFKILL_UNBLOCKED);
+	g_return_val_if_fail (rtype < RFKILL_TYPE_MAX, RFKILL_UNBLOCKED);
+
+	return NM_RFKILL_MANAGER_GET_PRIVATE (self)->rfkill_states[rtype];
+}
+
+static const char *
+rfkill_type_to_desc (RfKillType rtype)
+{
+	if (rtype == 0)
+		return "WiFi";
+	else if (rtype == 1)
+		return "WWAN";
+	else if (rtype == 2)
+		return "WiMAX";
+	return "unknown";
+}
+
+static const char *
+rfkill_state_to_desc (RfKillState rstate)
+{
+	if (rstate == 0)
+		return "unblocked";
+	else if (rstate == 1)
+		return "soft-blocked";
+	else if (rstate == 2)
+		return "hard-blocked";
+	return "unknown";
+}
+
+static Killswitch *
+killswitch_new (GUdevDevice *device, RfKillType rtype)
+{
+	Killswitch *ks;
+	GUdevDevice *parent = NULL, *grandparent = NULL;
+	const char *driver, *subsys, *parent_subsys = NULL;
+
+	ks = g_malloc0 (sizeof (Killswitch));
+	ks->name = g_strdup (g_udev_device_get_name (device));
+	ks->seqnum = g_udev_device_get_seqnum (device);
+	ks->path = g_strdup (g_udev_device_get_sysfs_path (device));
+	ks->rtype = rtype;
+
+	driver = g_udev_device_get_property (device, "DRIVER");
+	subsys = g_udev_device_get_subsystem (device);
+
+	/* Check parent for various attributes */
+	parent = g_udev_device_get_parent (device);
+	if (parent) {
+		parent_subsys = g_udev_device_get_subsystem (parent);
+		if (!driver)
+			driver = g_udev_device_get_property (parent, "DRIVER");
+		if (!driver) {
+			/* Sigh; try the grandparent */
+			grandparent = g_udev_device_get_parent (parent);
+			if (grandparent)
+				driver = g_udev_device_get_property (grandparent, "DRIVER");
+		}
+	}
+
+	if (!driver)
+		driver = "(unknown)";
+	ks->driver = g_strdup (driver);
+
+	if (   g_strcmp0 (subsys, "platform") == 0
+	    || g_strcmp0 (parent_subsys, "platform") == 0
+	    || g_strcmp0 (subsys, "acpi") == 0
+	    || g_strcmp0 (parent_subsys, "acpi") == 0)
+		ks->platform = TRUE;
+
+	if (grandparent)
+		g_object_unref (grandparent);
+	if (parent)
+		g_object_unref (parent);
+	return ks;
+}
+
+static void
+killswitch_destroy (Killswitch *ks)
+{
+	g_return_if_fail (ks != NULL);
+
+	g_free (ks->name);
+	g_free (ks->path);
+	g_free (ks->driver);
+	memset (ks, 0, sizeof (Killswitch));
+	g_free (ks);
+}
+
+NMRfkillManager *
+nm_rfkill_manager_new (void)
+{
+	return NM_RFKILL_MANAGER (g_object_new (NM_TYPE_RFKILL_MANAGER, NULL));
+}
+
+static RfKillState
+sysfs_state_to_nm_state (gint sysfs_state)
+{
+	switch (sysfs_state) {
+	case 0:
+		return RFKILL_SOFT_BLOCKED;
+	case 1:
+		return RFKILL_UNBLOCKED;
+	case 2:
+		return RFKILL_HARD_BLOCKED;
+	default:
+		nm_log_warn (LOGD_RFKILL, "unhandled rfkill state %d", sysfs_state);
+		break;
+	}
+	return RFKILL_UNBLOCKED;
+}
+
+static void
+recheck_killswitches (NMRfkillManager *self)
+{
+	NMRfkillManagerPrivate *priv = NM_RFKILL_MANAGER_GET_PRIVATE (self);
+	GSList *iter;
+	RfKillState poll_states[RFKILL_TYPE_MAX];
+	RfKillState platform_states[RFKILL_TYPE_MAX];
+	gboolean platform_checked[RFKILL_TYPE_MAX];
+	int i;
+
+	/* Default state is unblocked */
+	for (i = 0; i < RFKILL_TYPE_MAX; i++) {
+		poll_states[i] = RFKILL_UNBLOCKED;
+		platform_states[i] = RFKILL_UNBLOCKED;
+		platform_checked[i] = FALSE;
+	}
+
+	/* Poll the states of all killswitches */
+	for (iter = priv->killswitches; iter; iter = g_slist_next (iter)) {
+		Killswitch *ks = iter->data;
+		GUdevDevice *device;
+		RfKillState dev_state;
+		int sysfs_state;
+
+		device = g_udev_client_query_by_subsystem_and_name (priv->client, "rfkill", ks->name);
+		if (device) {
+			sysfs_state = g_udev_device_get_property_as_int (device, "RFKILL_STATE");
+			dev_state = sysfs_state_to_nm_state (sysfs_state);
+
+			nm_log_dbg (LOGD_RFKILL, "%s rfkill%s switch %s state now %d/%u",
+			            rfkill_type_to_desc (ks->rtype),
+			            ks->platform ? " platform" : "",
+			            ks->name,
+			            sysfs_state,
+			            dev_state);
+
+			if (ks->platform == FALSE) {
+				if (dev_state > poll_states[ks->rtype])
+					poll_states[ks->rtype] = dev_state;
+			} else {
+				platform_checked[ks->rtype] = TRUE;
+				if (dev_state > platform_states[ks->rtype])
+					platform_states[ks->rtype] = dev_state;
+			}
+			g_object_unref (device);
+		}
+	}
+
+	/* Log and emit change signal for final rfkill states */
+	for (i = 0; i < RFKILL_TYPE_MAX; i++) {
+		if (platform_checked[i] == TRUE) {
+			/* blocked platform switch state overrides device state, otherwise
+			 * let the device state stand. (bgo #655773)
+			 */
+			if (platform_states[i] != RFKILL_UNBLOCKED)
+				poll_states[i] = platform_states[i];
+		}
+
+		if (poll_states[i] != priv->rfkill_states[i]) {
+			nm_log_dbg (LOGD_RFKILL, "%s rfkill state now '%s'",
+			            rfkill_type_to_desc (i),
+			            rfkill_state_to_desc (poll_states[i]));
+
+			priv->rfkill_states[i] = poll_states[i];
+			g_signal_emit (self, signals[RFKILL_CHANGED], 0, i, priv->rfkill_states[i]);
+		}
+	}
+}
+
+static Killswitch *
+killswitch_find_by_name (NMRfkillManager *self, const char *name)
+{
+	NMRfkillManagerPrivate *priv = NM_RFKILL_MANAGER_GET_PRIVATE (self);
+	GSList *iter;
+
+	g_return_val_if_fail (name != NULL, NULL);
+
+	for (iter = priv->killswitches; iter; iter = g_slist_next (iter)) {
+		Killswitch *candidate = iter->data;
+
+		if (!strcmp (name, candidate->name))
+			return candidate;
+	}
+	return NULL;
+}
+
+static const RfKillType
+rfkill_type_to_enum (const char *str)
+{
+	g_return_val_if_fail (str != NULL, RFKILL_TYPE_UNKNOWN);
+
+	if (!strcmp (str, "wlan"))
+		return RFKILL_TYPE_WLAN;
+	else if (!strcmp (str, "wwan"))
+		return RFKILL_TYPE_WWAN;
+	else if (!strcmp (str, "wimax"))
+		return RFKILL_TYPE_WIMAX;
+
+	return RFKILL_TYPE_UNKNOWN;
+}
+
+static void
+add_one_killswitch (NMRfkillManager *self, GUdevDevice *device)
+{
+	NMRfkillManagerPrivate *priv = NM_RFKILL_MANAGER_GET_PRIVATE (self);
+	const char *str_type;
+	RfKillType rtype;
+	Killswitch *ks;
+
+	str_type = g_udev_device_get_property (device, "RFKILL_TYPE");
+	rtype = rfkill_type_to_enum (str_type);
+	if (rtype == RFKILL_TYPE_UNKNOWN)
+		return;
+
+	ks = killswitch_new (device, rtype);
+	priv->killswitches = g_slist_prepend (priv->killswitches, ks);
+
+	nm_log_info (LOGD_RFKILL, "%s: found %s radio killswitch (at %s) (%sdriver %s)",
+	             ks->name,
+	             rfkill_type_to_desc (rtype),
+	             ks->path,
+	             ks->platform ? "platform " : "",
+	             ks->driver ? ks->driver : "<unknown>");
+}
+
+static void
+rfkill_add (NMRfkillManager *self, GUdevDevice *device)
+{
+	const char *name;
+
+	g_return_if_fail (device != NULL);
+	name = g_udev_device_get_name (device);
+	g_return_if_fail (name != NULL);
+
+	if (!killswitch_find_by_name (self, name))
+		add_one_killswitch (self, device);
+}
+
+static void
+rfkill_remove (NMRfkillManager *self,
+               GUdevDevice *device)
+{
+	NMRfkillManagerPrivate *priv = NM_RFKILL_MANAGER_GET_PRIVATE (self);
+	GSList *iter;
+	const char *name;
+
+	g_return_if_fail (device != NULL);
+	name = g_udev_device_get_name (device);
+	g_return_if_fail (name != NULL);
+
+	for (iter = priv->killswitches; iter; iter = g_slist_next (iter)) {
+		Killswitch *ks = iter->data;
+
+		if (!strcmp (ks->name, name)) {
+			nm_log_info (LOGD_RFKILL, "radio killswitch %s disappeared", ks->path);
+			priv->killswitches = g_slist_remove (priv->killswitches, ks);
+			killswitch_destroy (ks);
+			break;
+		}
+	}
+}
+
+static void
+handle_uevent (GUdevClient *client,
+               const char *action,
+               GUdevDevice *device,
+               gpointer user_data)
+{
+	NMRfkillManager *self = NM_RFKILL_MANAGER (user_data);
+	const char *subsys;
+
+	g_return_if_fail (action != NULL);
+
+	/* A bit paranoid */
+	subsys = g_udev_device_get_subsystem (device);
+	g_return_if_fail (!g_strcmp0 (subsys, "rfkill"));
+
+	nm_log_dbg (LOGD_HW, "udev rfkill event: action '%s' device '%s'",
+	            action, g_udev_device_get_name (device));
+
+	if (!strcmp (action, "add"))
+		rfkill_add (self, device);
+	else if (!strcmp (action, "remove"))
+		rfkill_remove (self, device);
+
+	recheck_killswitches (self);
+}
+
+static void
+nm_rfkill_manager_init (NMRfkillManager *self)
+{
+	NMRfkillManagerPrivate *priv = NM_RFKILL_MANAGER_GET_PRIVATE (self);
+	const char *subsys[] = { "rfkill", NULL };
+	GList *switches, *iter;
+	guint32 i;
+
+	for (i = 0; i < RFKILL_TYPE_MAX; i++)
+		priv->rfkill_states[i] = RFKILL_UNBLOCKED;
+
+	priv->client = g_udev_client_new (subsys);
+	g_signal_connect (priv->client, "uevent", G_CALLBACK (handle_uevent), self);
+
+	switches = g_udev_client_query_by_subsystem (priv->client, "rfkill");
+	for (iter = switches; iter; iter = g_list_next (iter)) {
+		add_one_killswitch (self, G_UDEV_DEVICE (iter->data));
+		g_object_unref (G_UDEV_DEVICE (iter->data));
+	}
+	g_list_free (switches);
+
+	recheck_killswitches (self);
+}
+
+static void
+dispose (GObject *object)
+{
+	NMRfkillManager *self = NM_RFKILL_MANAGER (object);
+	NMRfkillManagerPrivate *priv = NM_RFKILL_MANAGER_GET_PRIVATE (self);
+
+	g_clear_object (&priv->client);
+
+	if (priv->killswitches) {
+		g_slist_free_full (priv->killswitches, (GDestroyNotify) killswitch_destroy);
+		priv->killswitches = NULL;
+	}
+
+	G_OBJECT_CLASS (nm_rfkill_manager_parent_class)->dispose (object);	
+}
+
+static void
+nm_rfkill_manager_class_init (NMRfkillManagerClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+	g_type_class_add_private (klass, sizeof (NMRfkillManagerPrivate));
+
+	/* virtual methods */
+	object_class->dispose = dispose;
+
+	/* Signals */
+	signals[RFKILL_CHANGED] =
+		g_signal_new ("rfkill-changed",
+		              G_OBJECT_CLASS_TYPE (object_class),
+		              G_SIGNAL_RUN_FIRST,
+		              G_STRUCT_OFFSET (NMRfkillManagerClass, rfkill_changed),
+		              NULL, NULL, NULL,
+		              G_TYPE_NONE, 2, G_TYPE_UINT, G_TYPE_UINT);
+}