Merge branch 'ethtool-rssh-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/net-next

Ben Hutchings says:

====================
Pull request: Fixes for new ethtool RSS commands

This addresses several problems I previously identified with the new
ETHTOOL_{G,S}RSSH commands:

1. Missing validation of reserved parameters
2. Vague documentation
3. Use of unnamed magic number
4. No consolidation with existing driver operations

I don't currently have access to suitable network hardware, but have
tested these changes with a dummy driver that can support various
combinations of operations and sizes, together with (a) Debian's ethtool
3.13 (b) ethtool 3.14 with the submitted patch to use ETHTOOL_{G,S}RSSH
and minor adjustment for fixes 1 and 3.

v2: Update RSS operations in vmxnet3 too
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

14 files changed, 120 insertions, 129 deletions

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
index 5203a8924edf..bd0600cf7266 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
@@ -3316,7 +3316,7 @@ static u32 bnx2x_get_rxfh_indir_size(struct net_device *dev)
         return T_ETH_INDIRECTION_TABLE_SIZE;
 }
 
-static int bnx2x_get_rxfh_indir(struct net_device *dev, u32 *indir)
+static int bnx2x_get_rxfh(struct net_device *dev, u32 *indir, u8 *key)
 {
         struct bnx2x *bp = netdev_priv(dev);
         u8 ind_table[T_ETH_INDIRECTION_TABLE_SIZE] = {0};
@@ -3340,14 +3340,15 @@ static int bnx2x_get_rxfh_indir(struct net_device *dev, u32 *indir)
         return 0;
 }
 
-static int bnx2x_set_rxfh_indir(struct net_device *dev, const u32 *indir)
+static int bnx2x_set_rxfh(struct net_device *dev, const u32 *indir,
+                          const u8 *key)
 {
         struct bnx2x *bp = netdev_priv(dev);
         size_t i;
 
         for (i = 0; i < T_ETH_INDIRECTION_TABLE_SIZE; i++) {
                 /*
-                 * The same as in bnx2x_get_rxfh_indir: we can't use a memcpy()
+                 * The same as in bnx2x_get_rxfh: we can't use a memcpy()
                  * as an internal storage of an indirection table is a u8 array
                  * while indir->ring_index points to an array of u32.
                  *
@@ -3471,8 +3472,8 @@ static const struct ethtool_ops bnx2x_ethtool_ops = {
         .get_rxnfc              = bnx2x_get_rxnfc,
         .set_rxnfc              = bnx2x_set_rxnfc,
         .get_rxfh_indir_size    = bnx2x_get_rxfh_indir_size,
-        .get_rxfh_indir         = bnx2x_get_rxfh_indir,
-        .set_rxfh_indir         = bnx2x_set_rxfh_indir,
+        .get_rxfh               = bnx2x_get_rxfh,
+        .set_rxfh               = bnx2x_set_rxfh,
         .get_channels           = bnx2x_get_channels,
         .set_channels           = bnx2x_set_channels,
         .get_module_info        = bnx2x_get_module_info,
@@ -3498,8 +3499,8 @@ static const struct ethtool_ops bnx2x_vf_ethtool_ops = {
         .get_rxnfc              = bnx2x_get_rxnfc,
         .set_rxnfc              = bnx2x_set_rxnfc,
         .get_rxfh_indir_size    = bnx2x_get_rxfh_indir_size,
-        .get_rxfh_indir         = bnx2x_get_rxfh_indir,
-        .set_rxfh_indir         = bnx2x_set_rxfh_indir,
+        .get_rxfh               = bnx2x_get_rxfh,
+        .set_rxfh               = bnx2x_set_rxfh,
         .get_channels           = bnx2x_get_channels,
         .set_channels           = bnx2x_set_channels,
 };
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 3b74da5f48a1..df2792d8383d 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -12532,7 +12532,7 @@ static u32 tg3_get_rxfh_indir_size(struct net_device *dev)
         return size;
 }
 
-static int tg3_get_rxfh_indir(struct net_device *dev, u32 *indir)
+static int tg3_get_rxfh(struct net_device *dev, u32 *indir, u8 *key)
 {
         struct tg3 *tp = netdev_priv(dev);
         int i;
@@ -12543,7 +12543,7 @@ static int tg3_get_rxfh_indir(struct net_device *dev, u32 *indir)
         return 0;
 }
 
-static int tg3_set_rxfh_indir(struct net_device *dev, const u32 *indir)
+static int tg3_set_rxfh(struct net_device *dev, const u32 *indir, const u8 *key)
 {
         struct tg3 *tp = netdev_priv(dev);
         size_t i;
@@ -14075,8 +14075,8 @@ static const struct ethtool_ops tg3_ethtool_ops = {
         .get_sset_count         = tg3_get_sset_count,
         .get_rxnfc              = tg3_get_rxnfc,
         .get_rxfh_indir_size    = tg3_get_rxfh_indir_size,
-        .get_rxfh_indir         = tg3_get_rxfh_indir,
-        .set_rxfh_indir         = tg3_set_rxfh_indir,
+        .get_rxfh               = tg3_get_rxfh,
+        .set_rxfh               = tg3_set_rxfh,
         .get_channels           = tg3_get_channels,
         .set_channels           = tg3_set_channels,
         .get_ts_info            = tg3_get_ts_info,
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 266a5bc6aedf..8cf6be93f491 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -2739,7 +2739,7 @@ static u32 get_rss_table_size(struct net_device *dev)
         return pi->rss_size;
 }
 
-static int get_rss_table(struct net_device *dev, u32 *p)
+static int get_rss_table(struct net_device *dev, u32 *p, u8 *key)
 {
         const struct port_info *pi = netdev_priv(dev);
         unsigned int n = pi->rss_size;
@@ -2749,7 +2749,7 @@ static int get_rss_table(struct net_device *dev, u32 *p)
         return 0;
 }
 
-static int set_rss_table(struct net_device *dev, const u32 *p)
+static int set_rss_table(struct net_device *dev, const u32 *p, const u8 *key)
 {
         unsigned int i;
         struct port_info *pi = netdev_priv(dev);
@@ -2851,8 +2851,8 @@ static const struct ethtool_ops cxgb_ethtool_ops = {
         .set_wol           = set_wol,
         .get_rxnfc         = get_rxnfc,
         .get_rxfh_indir_size = get_rss_table_size,
-        .get_rxfh_indir    = get_rss_table,
-        .set_rxfh_indir    = set_rss_table,
+        .get_rxfh          = get_rss_table,
+        .set_rxfh          = set_rss_table,
         .flash_device      = set_flash,
 };
 
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index a568f7d1a24c..f4ea3490f446 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -2065,7 +2065,7 @@ int be_cmd_reset_function(struct be_adapter *adapter)
 }
 
 int be_cmd_rss_config(struct be_adapter *adapter, u8 *rsstable,
-                      u32 rss_hash_opts, u16 table_size, u8 *rss_hkey)
+                      u32 rss_hash_opts, u16 table_size, const u8 *rss_hkey)
 {
         struct be_mcc_wrb *wrb;
         struct be_cmd_req_rss_config *req;
diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.h b/drivers/net/ethernet/emulex/benet/be_cmds.h
index d4616ffb7238..3e0a6b243806 100644
--- a/drivers/net/ethernet/emulex/benet/be_cmds.h
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.h
@@ -2082,7 +2082,7 @@ int be_cmd_query_fw_cfg(struct be_adapter *adapter, u32 *port_num,
                         u32 *function_mode, u32 *function_caps, u16 *asic_rev);
 int be_cmd_reset_function(struct be_adapter *adapter);
 int be_cmd_rss_config(struct be_adapter *adapter, u8 *rsstable,
-                      u32 rss_hash_opts, u16 table_size, u8 *rss_hkey);
+                      u32 rss_hash_opts, u16 table_size, const u8 *rss_hkey);
 int be_process_mcc(struct be_adapter *adapter);
 int be_cmd_set_beacon_state(struct be_adapter *adapter, u8 port_num, u8 beacon,
                             u8 status, u8 state);
diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index 970ae337daac..e2da4d20dd3d 100644
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -1117,7 +1117,8 @@ static int be_get_rxfh(struct net_device *netdev, u32 *indir, u8 *hkey)
         return 0;
 }
 
-static int be_set_rxfh(struct net_device *netdev, u32 *indir, u8 *hkey)
+static int be_set_rxfh(struct net_device *netdev, const u32 *indir,
+                       const u8 *hkey)
 {
         int rc = 0, i, j;
         struct be_adapter *adapter = netdev_priv(netdev);
diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
index df4dcfd364d8..9cd381a6c4be 100644
--- a/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_ethtool.c
@@ -624,13 +624,14 @@ static u32 i40evf_get_rxfh_indir_size(struct net_device *netdev)
 }
 
 /**
- * i40evf_get_rxfh_indir - get the rx flow hash indirection table
+ * i40evf_get_rxfh - get the rx flow hash indirection table
  * @netdev: network interface device structure
  * @indir: indirection table
+ * @key: hash key (will be %NULL until get_rxfh_key_size is implemented)
  *
  * Reads the indirection table directly from the hardware. Always returns 0.
  **/
-static int i40evf_get_rxfh_indir(struct net_device *netdev, u32 *indir)
+static int i40evf_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key)
 {
         struct i40evf_adapter *adapter = netdev_priv(netdev);
         struct i40e_hw *hw = &adapter->hw;
@@ -648,14 +649,16 @@ static int i40evf_get_rxfh_indir(struct net_device *netdev, u32 *indir)
 }
 
 /**
- * i40evf_set_rxfh_indir - set the rx flow hash indirection table
+ * i40evf_set_rxfh - set the rx flow hash indirection table
  * @netdev: network interface device structure
  * @indir: indirection table
+ * @key: hash key (will be %NULL until get_rxfh_key_size is implemented)
  *
  * Returns -EINVAL if the table specifies an inavlid queue id, otherwise
  * returns 0 after programming the table.
  **/
-static int i40evf_set_rxfh_indir(struct net_device *netdev, const u32 *indir)
+static int i40evf_set_rxfh(struct net_device *netdev, const u32 *indir,
+                           const u8 *key)
 {
         struct i40evf_adapter *adapter = netdev_priv(netdev);
         struct i40e_hw *hw = &adapter->hw;
@@ -689,8 +692,8 @@ static const struct ethtool_ops i40evf_ethtool_ops = {
         .get_rxnfc              = i40evf_get_rxnfc,
         .set_rxnfc              = i40evf_set_rxnfc,
         .get_rxfh_indir_size    = i40evf_get_rxfh_indir_size,
-        .get_rxfh_indir         = i40evf_get_rxfh_indir,
-        .set_rxfh_indir         = i40evf_set_rxfh_indir,
+        .get_rxfh               = i40evf_get_rxfh,
+        .set_rxfh               = i40evf_set_rxfh,
         .get_channels           = i40evf_get_channels,
 };
 
diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index a84297c85fb1..d8bbcf1873ca 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2830,7 +2830,7 @@ static u32 igb_get_rxfh_indir_size(struct net_device *netdev)
         return IGB_RETA_SIZE;
 }
 
-static int igb_get_rxfh_indir(struct net_device *netdev, u32 *indir)
+static int igb_get_rxfh(struct net_device *netdev, u32 *indir, u8 *key)
 {
         struct igb_adapter *adapter = netdev_priv(netdev);
         int i;
@@ -2876,7 +2876,8 @@ void igb_write_rss_indir_tbl(struct igb_adapter *adapter)
         }
 }
 
-static int igb_set_rxfh_indir(struct net_device *netdev, const u32 *indir)
+static int igb_set_rxfh(struct net_device *netdev, const u32 *indir,
+                        const u8 *key)
 {
         struct igb_adapter *adapter = netdev_priv(netdev);
         struct e1000_hw *hw = &adapter->hw;
@@ -3025,8 +3026,8 @@ static const struct ethtool_ops igb_ethtool_ops = {
         .get_module_info        = igb_get_module_info,
         .get_module_eeprom      = igb_get_module_eeprom,
         .get_rxfh_indir_size    = igb_get_rxfh_indir_size,
-        .get_rxfh_indir         = igb_get_rxfh_indir,
-        .set_rxfh_indir         = igb_set_rxfh_indir,
+        .get_rxfh               = igb_get_rxfh,
+        .set_rxfh               = igb_set_rxfh,
         .get_channels           = igb_get_channels,
         .set_channels           = igb_set_channels,
         .begin                  = igb_ethtool_begin,
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index 7ba3df3cb312..c021c96294fb 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -564,7 +564,7 @@ static u32 mlx4_en_get_rxfh_indir_size(struct net_device *dev)
         return priv->rx_ring_num;
 }
 
-static int mlx4_en_get_rxfh_indir(struct net_device *dev, u32 *ring_index)
+static int mlx4_en_get_rxfh(struct net_device *dev, u32 *ring_index, u8 *key)
 {
         struct mlx4_en_priv *priv = netdev_priv(dev);
         struct mlx4_en_rss_map *rss_map = &priv->rss_map;
@@ -582,8 +582,8 @@ static int mlx4_en_get_rxfh_indir(struct net_device *dev, u32 *ring_index)
         return err;
 }
 
-static int mlx4_en_set_rxfh_indir(struct net_device *dev,
-                const u32 *ring_index)
+static int mlx4_en_set_rxfh(struct net_device *dev, const u32 *ring_index,
+                            const u8 *key)
 {
         struct mlx4_en_priv *priv = netdev_priv(dev);
         struct mlx4_en_dev *mdev = priv->mdev;
@@ -1224,8 +1224,8 @@ const struct ethtool_ops mlx4_en_ethtool_ops = {
         .get_rxnfc = mlx4_en_get_rxnfc,
         .set_rxnfc = mlx4_en_set_rxnfc,
         .get_rxfh_indir_size = mlx4_en_get_rxfh_indir_size,
-        .get_rxfh_indir = mlx4_en_get_rxfh_indir,
-        .set_rxfh_indir = mlx4_en_set_rxfh_indir,
+        .get_rxfh = mlx4_en_get_rxfh,
+        .set_rxfh = mlx4_en_set_rxfh,
         .get_channels = mlx4_en_get_channels,
         .set_channels = mlx4_en_set_channels,
         .get_ts_info = mlx4_en_get_ts_info,
diff --git a/drivers/net/ethernet/sfc/ethtool.c b/drivers/net/ethernet/sfc/ethtool.c
index 0de8b07c24c2..74739c4b9997 100644
--- a/drivers/net/ethernet/sfc/ethtool.c
+++ b/drivers/net/ethernet/sfc/ethtool.c
@@ -1033,7 +1033,7 @@ static u32 efx_ethtool_get_rxfh_indir_size(struct net_device *net_dev)
                 0 : ARRAY_SIZE(efx->rx_indir_table));
 }
 
-static int efx_ethtool_get_rxfh_indir(struct net_device *net_dev, u32 *indir)
+static int efx_ethtool_get_rxfh(struct net_device *net_dev, u32 *indir, u8 *key)
 {
         struct efx_nic *efx = netdev_priv(net_dev);
 
@@ -1041,8 +1041,8 @@ static int efx_ethtool_get_rxfh_indir(struct net_device *net_dev, u32 *indir)
         return 0;
 }
 
-static int efx_ethtool_set_rxfh_indir(struct net_device *net_dev,
-                                      const u32 *indir)
+static int efx_ethtool_set_rxfh(struct net_device *net_dev,
+                                const u32 *indir, const u8 *key)
 {
         struct efx_nic *efx = netdev_priv(net_dev);
 
@@ -1125,8 +1125,8 @@ const struct ethtool_ops efx_ethtool_ops = {
         .get_rxnfc              = efx_ethtool_get_rxnfc,
         .set_rxnfc              = efx_ethtool_set_rxnfc,
         .get_rxfh_indir_size    = efx_ethtool_get_rxfh_indir_size,
-        .get_rxfh_indir         = efx_ethtool_get_rxfh_indir,
-        .set_rxfh_indir         = efx_ethtool_set_rxfh_indir,
+        .get_rxfh               = efx_ethtool_get_rxfh,
+        .set_rxfh               = efx_ethtool_set_rxfh,
         .get_ts_info            = efx_ethtool_get_ts_info,
         .get_module_info        = efx_ethtool_get_module_info,
         .get_module_eeprom      = efx_ethtool_get_module_eeprom,
diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
index 00e120296e92..9396cca93b09 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethtool.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
@@ -579,7 +579,7 @@ vmxnet3_get_rss_indir_size(struct net_device *netdev)
 }
 
 static int
-vmxnet3_get_rss_indir(struct net_device *netdev, u32 *p)
+vmxnet3_get_rss(struct net_device *netdev, u32 *p, u8 *key)
 {
         struct vmxnet3_adapter *adapter = netdev_priv(netdev);
         struct UPT1_RSSConf *rssConf = adapter->rss_conf;
@@ -592,7 +592,7 @@ vmxnet3_get_rss_indir(struct net_device *netdev, u32 *p)
 }
 
 static int
-vmxnet3_set_rss_indir(struct net_device *netdev, const u32 *p)
+vmxnet3_set_rss(struct net_device *netdev, const u32 *p, const u8 *key)
 {
         unsigned int i;
         unsigned long flags;
@@ -628,8 +628,8 @@ static const struct ethtool_ops vmxnet3_ethtool_ops = {
         .get_rxnfc         = vmxnet3_get_rxnfc,
 #ifdef VMXNET3_RSS
         .get_rxfh_indir_size = vmxnet3_get_rss_indir_size,
-        .get_rxfh_indir    = vmxnet3_get_rss_indir,
-        .set_rxfh_indir    = vmxnet3_set_rss_indir,
+        .get_rxfh          = vmxnet3_get_rss,
+        .set_rxfh          = vmxnet3_set_rss,
 #endif
 };
 
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 212f537fc686..e658229fee39 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -158,19 +158,16 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
  *      Returns zero if not supported for this specific device.
  * @get_rxfh_indir_size: Get the size of the RX flow hash indirection table.
  *      Returns zero if not supported for this specific device.
- * @get_rxfh_indir: Get the contents of the RX flow hash indirection table.
- *      Will not be called if @get_rxfh_indir_size returns zero.
  * @get_rxfh: Get the contents of the RX flow hash indirection table and hash
  *      key.
- *      Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size
- *      returns zero.
+ *      Will only be called if one or both of @get_rxfh_indir_size and
+ *      @get_rxfh_key_size are implemented and return non-zero.
  *      Returns a negative error code or zero.
- * @set_rxfh_indir: Set the contents of the RX flow hash indirection table.
- *      Will not be called if @get_rxfh_indir_size returns zero.
- * @set_rxfh: Set the contents of the RX flow hash indirection table and
- *      hash key.
- *      Will not be called if @get_rxfh_indir_size and @get_rxfh_key_size
- *      returns zero.
+ * @set_rxfh: Set the contents of the RX flow hash indirection table and/or
+ *      hash key.  In case only the indirection table or hash key is to be
+ *      changed, the other argument will be %NULL.
+ *      Will only be called if one or both of @get_rxfh_indir_size and
+ *      @get_rxfh_key_size are implemented and return non-zero.
  *      Returns a negative error code or zero.
  * @get_channels: Get number of channels.
  * @set_channels: Set number of channels.  Returns a negative error code or
@@ -244,10 +241,9 @@ struct ethtool_ops {
         int     (*reset)(struct net_device *, u32 *);
         u32     (*get_rxfh_key_size)(struct net_device *);
         u32     (*get_rxfh_indir_size)(struct net_device *);
-        int     (*get_rxfh)(struct net_device *, u32 *, u8 *);
-        int     (*set_rxfh)(struct net_device *, u32 *, u8 *);
-        int     (*get_rxfh_indir)(struct net_device *, u32 *);
-        int     (*set_rxfh_indir)(struct net_device *, const u32 *);
+        int     (*get_rxfh)(struct net_device *, u32 *indir, u8 *key);
+        int     (*set_rxfh)(struct net_device *, const u32 *indir,
+                            const u8 *key);
         void    (*get_channels)(struct net_device *, struct ethtool_channels *);
         int     (*set_channels)(struct net_device *, struct ethtool_channels *);
         int     (*get_dump_flag)(struct net_device *, struct ethtool_dump *);
diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index d47d31d6fa0e..e3c7a719c76b 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -850,21 +850,23 @@ struct ethtool_rxfh_indir {
  * struct ethtool_rxfh - command to get/set RX flow hash indir or/and hash key.
  * @cmd: Specific command number - %ETHTOOL_GRSSH or %ETHTOOL_SRSSH
  * @rss_context: RSS context identifier.
- * @indir_size: On entry, the array size of the user buffer, which may be zero.
- *              On return from %ETHTOOL_GRSSH, the array size of the hardware
- *              indirection table.
- * @key_size:   On entry, the array size of the user buffer in bytes,
- *              which may be zero.
- *              On return from %ETHTOOL_GRSSH, the size of the RSS hash key.
+ * @indir_size: On entry, the array size of the user buffer for the
+ *      indirection table, which may be zero, or (for %ETHTOOL_SRSSH),
+ *      %ETH_RXFH_INDIR_NO_CHANGE.  On return from %ETHTOOL_GRSSH,
+ *      the array size of the hardware indirection table.
+ * @key_size: On entry, the array size of the user buffer for the hash key,
+ *      which may be zero.  On return from %ETHTOOL_GRSSH, the size of the
+ *      hardware hash key.
  * @rsvd:       Reserved for future extensions.
  * @rss_config: RX ring/queue index for each hash value i.e., indirection table
- *              of size @indir_size followed by hash key of size @key_size.
+ *      of @indir_size __u32 elements, followed by hash key of @key_size
+ *      bytes.
  *
  * For %ETHTOOL_GRSSH, a @indir_size and key_size of zero means that only the
- * size should be returned.  For %ETHTOOL_SRSSH, a @indir_size of 0xDEADBEEF
- * means that indir table setting is not requested and a @indir_size of zero
- * means the indir table should be reset to default values.  This last feature
- * is not supported by the original implementations.
+ * size should be returned.  For %ETHTOOL_SRSSH, an @indir_size of
+ * %ETH_RXFH_INDIR_NO_CHANGE means that indir table setting is not requested
+ * and a @indir_size of zero means the indir table should be reset to default
+ * values.
  */
 struct ethtool_rxfh {
         __u32   cmd;
@@ -874,6 +876,7 @@ struct ethtool_rxfh {
         __u32   rsvd[2];
         __u32   rss_config[0];
 };
+#define ETH_RXFH_INDIR_NO_CHANGE        0xffffffff
 
 /**
  * struct ethtool_rx_ntuple_flow_spec - specification for RX flow filter
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index aa8978ac47d2..17cb912793fa 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -561,19 +561,17 @@ static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
                                         struct ethtool_rxnfc *rx_rings,
                                         u32 size)
 {
-        int ret = 0, i;
+        int i;
 
         if (copy_from_user(indir, useraddr, size * sizeof(indir[0])))
-                ret = -EFAULT;
+                return -EFAULT;
 
         /* Validate ring indices */
-        for (i = 0; i < size; i++) {
-                if (indir[i] >= rx_rings->data) {
-                        ret = -EINVAL;
-                        break;
-                }
-        }
-        return ret;
+        for (i = 0; i < size; i++)
+                if (indir[i] >= rx_rings->data)
+                        return -EINVAL;
+
+        return 0;
 }
 
 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
@@ -584,7 +582,7 @@ static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
         int ret;
 
         if (!dev->ethtool_ops->get_rxfh_indir_size ||
-            !dev->ethtool_ops->get_rxfh_indir)
+            !dev->ethtool_ops->get_rxfh)
                 return -EOPNOTSUPP;
         dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
         if (dev_size == 0)
@@ -610,7 +608,7 @@ static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
         if (!indir)
                 return -ENOMEM;
 
-        ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
+        ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL);
         if (ret)
                 goto out;
 
@@ -634,7 +632,7 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
         int ret;
         u32 ringidx_offset = offsetof(struct ethtool_rxfh_indir, ring_index[0]);
 
-        if (!ops->get_rxfh_indir_size || !ops->set_rxfh_indir ||
+        if (!ops->get_rxfh_indir_size || !ops->set_rxfh ||
             !ops->get_rxnfc)
                 return -EOPNOTSUPP;
 
@@ -671,7 +669,7 @@ static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
                         goto out;
         }
 
-        ret = ops->set_rxfh_indir(dev, indir);
+        ret = ops->set_rxfh(dev, indir, NULL);
 
 out:
         kfree(indir);
@@ -683,11 +681,11 @@ static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
 {
         int ret;
         const struct ethtool_ops *ops = dev->ethtool_ops;
-        u32 user_indir_size = 0, user_key_size = 0;
+        u32 user_indir_size, user_key_size;
         u32 dev_indir_size = 0, dev_key_size = 0;
+        struct ethtool_rxfh rxfh;
         u32 total_size;
-        u32 indir_offset, indir_bytes;
-        u32 key_offset;
+        u32 indir_bytes;
         u32 *indir = NULL;
         u8 *hkey = NULL;
         u8 *rss_config;
@@ -699,33 +697,24 @@ static noinline_for_stack int ethtool_get_rxfh(struct net_device *dev,
 
         if (ops->get_rxfh_indir_size)
                 dev_indir_size = ops->get_rxfh_indir_size(dev);
-
-        indir_offset = offsetof(struct ethtool_rxfh, indir_size);
-
-        if (copy_from_user(&user_indir_size,
-                           useraddr + indir_offset,
-                           sizeof(user_indir_size)))
-                return -EFAULT;
-
-        if (copy_to_user(useraddr + indir_offset,
-                         &dev_indir_size, sizeof(dev_indir_size)))
-                return -EFAULT;
-
         if (ops->get_rxfh_key_size)
                 dev_key_size = ops->get_rxfh_key_size(dev);
 
         if ((dev_key_size + dev_indir_size) == 0)
                 return -EOPNOTSUPP;
 
-        key_offset = offsetof(struct ethtool_rxfh, key_size);
-
-        if (copy_from_user(&user_key_size,
-                           useraddr + key_offset,
-                           sizeof(user_key_size)))
+        if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
                 return -EFAULT;
+        user_indir_size = rxfh.indir_size;
+        user_key_size = rxfh.key_size;
 
-        if (copy_to_user(useraddr + key_offset,
-                         &dev_key_size, sizeof(dev_key_size)))
+        /* Check that reserved fields are 0 for now */
+        if (rxfh.rss_context || rxfh.rsvd[0] || rxfh.rsvd[1])
+                return -EINVAL;
+
+        rxfh.indir_size = dev_indir_size;
+        rxfh.key_size = dev_key_size;
+        if (copy_to_user(useraddr, &rxfh, sizeof(rxfh)))
                 return -EFAULT;
 
         /* If the user buffer size is 0, this is just a query for the
@@ -770,12 +759,11 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
         int ret;
         const struct ethtool_ops *ops = dev->ethtool_ops;
         struct ethtool_rxnfc rx_rings;
-        u32 user_indir_size = 0, dev_indir_size = 0, i;
-        u32 user_key_size = 0, dev_key_size = 0;
+        struct ethtool_rxfh rxfh;
+        u32 dev_indir_size = 0, dev_key_size = 0, i;
         u32 *indir = NULL, indir_bytes = 0;
         u8 *hkey = NULL;
         u8 *rss_config;
-        u32 indir_offset, key_offset;
         u32 rss_cfg_offset = offsetof(struct ethtool_rxfh, rss_config[0]);
 
         if (!(ops->get_rxfh_indir_size || ops->get_rxfh_key_size) ||
@@ -784,36 +772,33 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
 
         if (ops->get_rxfh_indir_size)
                 dev_indir_size = ops->get_rxfh_indir_size(dev);
-
-        indir_offset = offsetof(struct ethtool_rxfh, indir_size);
-        if (copy_from_user(&user_indir_size,
-                           useraddr + indir_offset,
-                           sizeof(user_indir_size)))
-                return -EFAULT;
-
         if (ops->get_rxfh_key_size)
                 dev_key_size = dev->ethtool_ops->get_rxfh_key_size(dev);
-
         if ((dev_key_size + dev_indir_size) == 0)
                 return -EOPNOTSUPP;
 
-        key_offset = offsetof(struct ethtool_rxfh, key_size);
-        if (copy_from_user(&user_key_size,
-                           useraddr + key_offset,
-                           sizeof(user_key_size)))
+        if (copy_from_user(&rxfh, useraddr, sizeof(rxfh)))
                 return -EFAULT;
 
+        /* Check that reserved fields are 0 for now */
+        if (rxfh.rss_context || rxfh.rsvd[0] || rxfh.rsvd[1])
+                return -EINVAL;
+
         /* If either indir or hash key is valid, proceed further.
+         * It is not valid to request that both be unchanged.
          */
-        if ((user_indir_size && ((user_indir_size != 0xDEADBEEF) &&
-                                 user_indir_size != dev_indir_size)) ||
-            (user_key_size && (user_key_size != dev_key_size)))
+        if ((rxfh.indir_size &&
+             rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE &&
+             rxfh.indir_size != dev_indir_size) ||
+            (rxfh.key_size && (rxfh.key_size != dev_key_size)) ||
+            (rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE &&
+             rxfh.key_size == 0))
                 return -EINVAL;
 
-        if (user_indir_size != 0xDEADBEEF)
+        if (rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE)
                 indir_bytes = dev_indir_size * sizeof(indir[0]);
 
-        rss_config = kzalloc(indir_bytes + user_key_size, GFP_USER);
+        rss_config = kzalloc(indir_bytes + rxfh.key_size, GFP_USER);
         if (!rss_config)
                 return -ENOMEM;
 
@@ -822,28 +807,29 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
         if (ret)
                 goto out;
 
-        /* user_indir_size == 0 means reset the indir table to default.
-         * user_indir_size == 0xDEADBEEF means indir setting is not requested.
+        /* rxfh.indir_size == 0 means reset the indir table to default.
+         * rxfh.indir_size == ETH_RXFH_INDIR_NO_CHANGE means leave it unchanged.
          */
-        if (user_indir_size && user_indir_size != 0xDEADBEEF) {
+        if (rxfh.indir_size &&
+            rxfh.indir_size != ETH_RXFH_INDIR_NO_CHANGE) {
                 indir = (u32 *)rss_config;
                 ret = ethtool_copy_validate_indir(indir,
                                                   useraddr + rss_cfg_offset,
                                                   &rx_rings,
-                                                  user_indir_size);
+                                                  rxfh.indir_size);
                 if (ret)
                         goto out;
-        } else if (user_indir_size == 0) {
+        } else if (rxfh.indir_size == 0) {
                 indir = (u32 *)rss_config;
                 for (i = 0; i < dev_indir_size; i++)
                         indir[i] = ethtool_rxfh_indir_default(i, rx_rings.data);
         }
 
-        if (user_key_size) {
+        if (rxfh.key_size) {
                 hkey = rss_config + indir_bytes;
                 if (copy_from_user(hkey,
                                    useraddr + rss_cfg_offset + indir_bytes,
-                                   user_key_size)) {
+                                   rxfh.key_size)) {
                         ret = -EFAULT;
                         goto out;
                 }