platform: support ethtool channels properties

Support setting the ethtool channels properties in platform via
ETHTOOL_GCHANNELS and ETHTOOL_SCHANNELS ioctls.

src/libnm-platform/nm-platform-utils.c

@@ -1067,6 +1067,69 @@ nmp_utils_ethtool_set_ring(int ifindex, const NMEthtoolRingState *ring)
     return TRUE;
 }
 
+gboolean
+nmp_utils_ethtool_get_channels(int ifindex, NMEthtoolChannelsState *channels)
+{
+    struct ethtool_channels eth_data;
+
+    g_return_val_if_fail(ifindex > 0, FALSE);
+    g_return_val_if_fail(channels, FALSE);
+
+    eth_data.cmd = ETHTOOL_GCHANNELS;
+
+    if (_ethtool_call_once(ifindex, &eth_data, sizeof(eth_data)) < 0) {
+        nm_log_trace(LOGD_PLATFORM,
+                     "ethtool[%d]: %s: failure getting channels settings",
+                     ifindex,
+                     "get-channels");
+        return FALSE;
+    }
+
+    *channels = (NMEthtoolChannelsState){
+        .rx       = eth_data.rx_count,
+        .tx       = eth_data.tx_count,
+        .other    = eth_data.other_count,
+        .combined = eth_data.combined_count,
+    };
+
+    nm_log_trace(LOGD_PLATFORM,
+                 "ethtool[%d]: %s: retrieved kernel channels settings",
+                 ifindex,
+                 "get-channels");
+    return TRUE;
+}
+
+gboolean
+nmp_utils_ethtool_set_channels(int ifindex, const NMEthtoolChannelsState *channels)
+{
+    struct ethtool_channels eth_data;
+
+    g_return_val_if_fail(ifindex > 0, FALSE);
+    g_return_val_if_fail(channels, FALSE);
+
+    eth_data = (struct ethtool_channels){
+        .cmd            = ETHTOOL_SCHANNELS,
+        .rx_count       = channels->rx,
+        .tx_count       = channels->tx,
+        .other_count    = channels->other,
+        .combined_count = channels->combined,
+    };
+
+    if (_ethtool_call_once(ifindex, &eth_data, sizeof(eth_data)) < 0) {
+        nm_log_trace(LOGD_PLATFORM,
+                     "ethtool[%d]: %s: failure setting channels settings",
+                     ifindex,
+                     "set-channels");
+        return FALSE;
+    }
+
+    nm_log_trace(LOGD_PLATFORM,
+                 "ethtool[%d]: %s: set kernel channels settings",
+                 ifindex,
+                 "set-channels");
+    return TRUE;
+}
+
 gboolean
 nmp_utils_ethtool_get_pause(int ifindex, NMEthtoolPauseState *pause)
 {

src/libnm-platform/nm-platform-utils.h

@@ -54,6 +54,10 @@ gboolean nmp_utils_ethtool_get_ring(int ifindex, NMEthtoolRingState *ring);
 
 gboolean nmp_utils_ethtool_set_ring(int ifindex, const NMEthtoolRingState *ring);
 
+gboolean nmp_utils_ethtool_get_channels(int ifindex, NMEthtoolChannelsState *channels);
+
+gboolean nmp_utils_ethtool_set_channels(int ifindex, const NMEthtoolChannelsState *channels);
+
 gboolean nmp_utils_ethtool_get_pause(int ifindex, NMEthtoolPauseState *pause);
 
 gboolean nmp_utils_ethtool_set_pause(int ifindex, const NMEthtoolPauseState *pause);

src/libnm-platform/nm-platform.c

@@ -3580,6 +3580,31 @@ nm_platform_ethtool_set_ring(NMPlatform *self, int ifindex, const NMEthtoolRingS
     return nmp_utils_ethtool_set_ring(ifindex, ring);
 }
 
+gboolean
+nm_platform_ethtool_get_link_channels(NMPlatform             *self,
+                                      int                     ifindex,
+                                      NMEthtoolChannelsState *channels)
+{
+    _CHECK_SELF_NETNS(self, klass, netns, FALSE);
+
+    g_return_val_if_fail(ifindex > 0, FALSE);
+    g_return_val_if_fail(channels, FALSE);
+
+    return nmp_utils_ethtool_get_channels(ifindex, channels);
+}
+
+gboolean
+nm_platform_ethtool_set_channels(NMPlatform                   *self,
+                                 int                           ifindex,
+                                 const NMEthtoolChannelsState *channels)
+{
+    _CHECK_SELF_NETNS(self, klass, netns, FALSE);
+
+    g_return_val_if_fail(ifindex > 0, FALSE);
+
+    return nmp_utils_ethtool_set_channels(ifindex, channels);
+}
+
 gboolean
 nm_platform_ethtool_get_link_pause(NMPlatform *self, int ifindex, NMEthtoolPauseState *pause)
 {

src/libnm-platform/nm-platform.h

@@ -2567,6 +2567,14 @@ gboolean nm_platform_ethtool_get_link_ring(NMPlatform *self, int ifindex, NMEtht
 gboolean
 nm_platform_ethtool_set_ring(NMPlatform *self, int ifindex, const NMEthtoolRingState *ring);
 
+gboolean nm_platform_ethtool_get_link_channels(NMPlatform             *self,
+                                               int                     ifindex,
+                                               NMEthtoolChannelsState *channels);
+
+gboolean nm_platform_ethtool_set_channels(NMPlatform                   *self,
+                                          int                           ifindex,
+                                          const NMEthtoolChannelsState *channels);
+
 gboolean
 nm_platform_ethtool_get_link_pause(NMPlatform *self, int ifindex, NMEthtoolPauseState *pause);
 

src/libnm-platform/nmp-base.h

@@ -93,16 +93,12 @@ typedef struct {
     const NMEthtoolFeatureState states_list[];
 } NMEthtoolFeatureStates;
 
-/*****************************************************************************/
-
 typedef struct {
     guint32
         s[_NM_ETHTOOL_ID_COALESCE_NUM /* indexed by (NMEthtoolID - _NM_ETHTOOL_ID_COALESCE_FIRST) */
     ];
 } NMEthtoolCoalesceState;
 
-/*****************************************************************************/
-
 typedef struct {
     guint32 rx_pending;
     guint32 rx_mini_pending;
@@ -116,6 +112,13 @@ typedef struct {
     bool tx : 1;
 } NMEthtoolPauseState;
 
+typedef struct {
+    guint32 rx;
+    guint32 tx;
+    guint32 other;
+    guint32 combined;
+} NMEthtoolChannelsState;
+
 /*****************************************************************************/
 
 typedef struct _NMPNetns                 NMPNetns;