platform: move driver & firmware version reading into the platform

(cherry picked from commit ddaea22332907c05222cbec1e1b4365689fbda9f)

5 files changed, 114 insertions, 58 deletions

diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index b96b45a458..c16b892eab 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -28,8 +28,6 @@
 #include <string.h>
 #include <unistd.h>
 #include <errno.h>
-#include <linux/sockios.h>
-#include <linux/ethtool.h>
 #include <sys/ioctl.h>
 #include <signal.h>
 #include <sys/types.h>
@@ -8382,46 +8380,6 @@ nm_device_init (NMDevice *self)
 	priv->default_route.v6_is_assumed = TRUE;
 }
 
-/*
- * Get driver info from SIOCETHTOOL ioctl() for 'iface'
- * Returns driver and firmware versions to 'driver_version and' 'firmware_version'
- */
-static gboolean
-device_get_driver_info (NMDevice *self, const char *iface, char **driver_version, char **firmware_version)
-{
-	struct ethtool_drvinfo drvinfo;
-	struct ifreq req;
-	int fd;
-
-	fd = socket (PF_INET, SOCK_DGRAM, 0);
-	if (fd < 0) {
-		_LOGW (LOGD_HW, "couldn't open control socket.");
-		return FALSE;
-	}
-
-	/* Get driver and firmware version info */
-	memset (&drvinfo, 0, sizeof (drvinfo));
-	memset (&req, 0, sizeof (struct ifreq));
-	strncpy (req.ifr_name, iface, IFNAMSIZ);
-	drvinfo.cmd = ETHTOOL_GDRVINFO;
-	req.ifr_data = &drvinfo;
-
-	errno = 0;
-	if (ioctl (fd, SIOCETHTOOL, &req) < 0) {
-		_LOGD (LOGD_HW, "SIOCETHTOOL ioctl() failed: cmd=ETHTOOL_GDRVINFO, iface=%s, errno=%d",
-		       iface, errno);
-		close (fd);
-		return FALSE;
-	}
-	if (driver_version)
-		*driver_version = g_strdup (drvinfo.version);
-	if (firmware_version)
-		*firmware_version = g_strdup (drvinfo.fw_version);
-
-	close (fd);
-	return TRUE;
-}
-
 static GObject*
 constructor (GType type,
              guint n_construct_params,
@@ -8457,10 +8415,13 @@ constructor (GType type,
 	if (NM_DEVICE_GET_CLASS (self)->get_generic_capabilities)
 		priv->capabilities |= NM_DEVICE_GET_CLASS (self)->get_generic_capabilities (self);
 
-	if (priv->ifindex <= 0 && !nm_device_has_capability (self, NM_DEVICE_CAP_IS_NON_KERNEL))
-		_LOGW (LOGD_HW, "failed to look up interface index");
-
-	device_get_driver_info (self, priv->iface, &priv->driver_version, &priv->firmware_version);
+	if (priv->ifindex > 0) {
+		nm_platform_link_get_driver_info (NM_PLATFORM_GET,
+		                                  priv->ifindex,
+		                                  NULL,
+		                                  &priv->driver_version,
+		                                  &priv->firmware_version);
+	}
 
 	/* Watch for external IP config changes */
 	platform = nm_platform_get ();
diff --git a/src/platform/nm-fake-platform.c b/src/platform/nm-fake-platform.c
index 1d74a3c5e7..4cf2e46452 100644
--- a/src/platform/nm-fake-platform.c
+++ b/src/platform/nm-fake-platform.c
@@ -503,6 +503,26 @@ link_get_wake_on_lan (NMPlatform *platform, int ifindex)
 }
 
 static gboolean
+link_get_driver_info (NMPlatform *platform,
+                      int ifindex,
+                      char **out_driver_name,
+                      char **out_driver_version,
+                      char **out_fw_version)
+{
+	if (out_driver_name)
+		*out_driver_name = NULL;
+	if (out_driver_version)
+		*out_driver_version = NULL;
+	if (out_fw_version)
+		*out_fw_version = NULL;
+
+	/* We call link_get just to cause an error to be set if @ifindex is bad. */
+	link_get (platform, ifindex);
+
+	return TRUE;
+}
+
+static gboolean
 link_supports_carrier_detect (NMPlatform *platform, int ifindex)
 {
 	NMFakePlatformLink *device = link_get (platform, ifindex);
@@ -1418,6 +1438,7 @@ nm_fake_platform_class_init (NMFakePlatformClass *klass)
 	platform_class->link_get_physical_port_id = link_get_physical_port_id;
 	platform_class->link_get_dev_id = link_get_dev_id;
 	platform_class->link_get_wake_on_lan = link_get_wake_on_lan;
+	platform_class->link_get_driver_info = link_get_driver_info;
 
 	platform_class->link_supports_carrier_detect = link_supports_carrier_detect;
 	platform_class->link_supports_vlans = link_supports_vlans;
diff --git a/src/platform/nm-linux-platform.c b/src/platform/nm-linux-platform.c
index 67e93c001f..e13addc600 100644
--- a/src/platform/nm-linux-platform.c
+++ b/src/platform/nm-linux-platform.c
@@ -372,6 +372,9 @@ ethtool_get (const char *name, gpointer edata)
 	struct ifreq ifr;
 	int fd;
 
+	if (!name || !*name)
+		return FALSE;
+
 	memset (&ifr, 0, sizeof (ifr));
 	strncpy (ifr.ifr_name, name, IFNAMSIZ);
 	ifr.ifr_data = edata;
@@ -426,21 +429,29 @@ ethtool_get_stringset_index (const char *ifname, int stringset_id, const char *s
 	return -1;
 }
 
-static const char *
-ethtool_get_driver (const char *ifname)
+static gboolean
+ethtool_get_driver_info (const char *ifname,
+                         char **out_driver_name,
+                         char **out_driver_version,
+                         char **out_fw_version)
 {
 	struct ethtool_drvinfo drvinfo = { 0 };
 
-	g_return_val_if_fail (ifname != NULL, NULL);
+	if (!ifname)
+		return FALSE;
 
 	drvinfo.cmd = ETHTOOL_GDRVINFO;
 	if (!ethtool_get (ifname, &drvinfo))
-		return NULL;
+		return FALSE;
 
-	if (!*drvinfo.driver)
-		return NULL;
+	if (out_driver_name)
+		*out_driver_name = g_strdup (drvinfo.driver);
+	if (out_driver_version)
+		*out_driver_version = g_strdup (drvinfo.version);
+	if (out_fw_version)
+		*out_fw_version = g_strdup (drvinfo.fw_version);
 
-	return g_intern_string (drvinfo.driver);
+	return TRUE;
 }
 
 /******************************************************************
@@ -983,7 +994,7 @@ link_extract_type (NMPlatform *platform, struct rtnl_link *rtnllink)
 
 	ifname = rtnl_link_get_name (rtnllink);
 	if (ifname) {
-		const char *driver = ethtool_get_driver (ifname);
+		gs_free char *driver = NULL;
 		gs_free char *sysfs_path = NULL;
 		gs_free char *anycast_mask = NULL;
 		gs_free char *devtype = NULL;
@@ -997,8 +1008,10 @@ link_extract_type (NMPlatform *platform, struct rtnl_link *rtnllink)
 		}
 
 		/* Fallback OVS detection for kernel <= 3.16 */
-		if (!g_strcmp0 (driver, "openvswitch"))
-			return NM_LINK_TYPE_OPENVSWITCH;
+		if (ethtool_get_driver_info (ifname, &driver, NULL, NULL)) {
+			if (!g_strcmp0 (driver, "openvswitch"))
+				return NM_LINK_TYPE_OPENVSWITCH;
+		}
 
 		sysfs_path = g_strdup_printf ("/sys/class/net/%s", ifname);
 		anycast_mask = g_strdup_printf ("%s/anycast_mask", sysfs_path);
@@ -1041,6 +1054,7 @@ init_link (NMPlatform *platform, NMPlatformLink *info, struct rtnl_link *rtnllin
 	NMLinuxPlatformPrivate *priv = NM_LINUX_PLATFORM_GET_PRIVATE (platform);
 	GUdevDevice *udev_device;
 	const char *name;
+	char *tmp;
 
 	g_return_val_if_fail (rtnllink, FALSE);
 
@@ -1070,8 +1084,12 @@ init_link (NMPlatform *platform, NMPlatformLink *info, struct rtnl_link *rtnllin
 
 	if (!info->driver)
 		info->driver = info->kind;
-	if (!info->driver)
-		info->driver = ethtool_get_driver (info->name);
+	if (!info->driver) {
+		if (ethtool_get_driver_info (name, &tmp, NULL, NULL)) {
+			info->driver = g_intern_string (tmp);
+			g_free (tmp);
+		}
+	}
 	if (!info->driver)
 		info->driver = "unknown";
 
@@ -3659,6 +3677,19 @@ link_get_wake_on_lan (NMPlatform *platform, int ifindex)
 		return FALSE;
 }
 
+static gboolean
+link_get_driver_info (NMPlatform *platform,
+                      int ifindex,
+                      char **out_driver_name,
+                      char **out_driver_version,
+                      char **out_fw_version)
+{
+	return ethtool_get_driver_info (nm_platform_link_get_name (platform, ifindex),
+	                                out_driver_name,
+	                                out_driver_version,
+	                                out_fw_version);
+}
+
 /******************************************************************/
 
 static gboolean
@@ -4762,6 +4793,7 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
 	platform_class->link_get_physical_port_id = link_get_physical_port_id;
 	platform_class->link_get_dev_id = link_get_dev_id;
 	platform_class->link_get_wake_on_lan = link_get_wake_on_lan;
+	platform_class->link_get_driver_info = link_get_driver_info;
 
 	platform_class->link_supports_carrier_detect = link_supports_carrier_detect;
 	platform_class->link_supports_vlans = link_supports_vlans;
diff --git a/src/platform/nm-platform.c b/src/platform/nm-platform.c
index 9ce677ee18..c1d2f4a184 100644
--- a/src/platform/nm-platform.c
+++ b/src/platform/nm-platform.c
@@ -1244,6 +1244,38 @@ nm_platform_link_get_wake_on_lan (NMPlatform *self, int ifindex)
 }
 
 /**
+ * nm_platform_link_get_driver_info:
+ * @self: platform instance
+ * @ifindex: Interface index
+ * @out_driver_name: (transfer full): on success, the driver name if available
+ * @out_driver_version: (transfer full): on success, the driver version if available
+ * @out_fw_version: (transfer full): on success, the firmware version if available
+ *
+ * Returns: %TRUE on success (though @out_driver_name, @out_driver_version and
+ * @out_fw_version can be %NULL if no information was available), %FALSE on
+ * failure.
+ */
+gboolean
+nm_platform_link_get_driver_info (NMPlatform *self,
+                                  int ifindex,
+                                  char **out_driver_name,
+                                  char **out_driver_version,
+                                  char **out_fw_version)
+{
+	_CHECK_SELF (self, klass, FALSE);
+	reset_error (self);
+
+	g_return_val_if_fail (ifindex >= 0, FALSE);
+	g_return_val_if_fail (klass->link_get_driver_info, FALSE);
+
+	return klass->link_get_driver_info (self,
+	                                    ifindex,
+	                                    out_driver_name,
+	                                    out_driver_version,
+	                                    out_fw_version);
+}
+
+/**
  * nm_platform_link_enslave:
  * @self: platform instance
  * @master: Interface index of the master
diff --git a/src/platform/nm-platform.h b/src/platform/nm-platform.h
index 6d8d1cfede..bec976ab5b 100644
--- a/src/platform/nm-platform.h
+++ b/src/platform/nm-platform.h
@@ -412,6 +412,11 @@ typedef struct {
 	char *   (*link_get_physical_port_id) (NMPlatform *, int ifindex);
 	guint    (*link_get_dev_id) (NMPlatform *, int ifindex);
 	gboolean (*link_get_wake_on_lan) (NMPlatform *, int ifindex);
+	gboolean (*link_get_driver_info) (NMPlatform *,
+	                                  int ifindex,
+	                                  char **out_driver_name,
+	                                  char **out_driver_version,
+	                                  char **out_fw_version);
 
 	gboolean (*link_supports_carrier_detect) (NMPlatform *, int ifindex);
 	gboolean (*link_supports_vlans) (NMPlatform *, int ifindex);
@@ -569,6 +574,11 @@ gboolean nm_platform_link_set_mtu (NMPlatform *self, int ifindex, guint32 mtu);
 char    *nm_platform_link_get_physical_port_id (NMPlatform *self, int ifindex);
 guint    nm_platform_link_get_dev_id (NMPlatform *self, int ifindex);
 gboolean nm_platform_link_get_wake_on_lan (NMPlatform *self, int ifindex);
+gboolean nm_platform_link_get_driver_info (NMPlatform *self,
+                                           int ifindex,
+                                           char **out_driver_name,
+                                           char **out_driver_version,
+                                           char **out_fw_version);
 
 gboolean nm_platform_link_supports_carrier_detect (NMPlatform *self, int ifindex);
 gboolean nm_platform_link_supports_vlans (NMPlatform *self, int ifindex);