On 9/1/2017 8:06 AM, David Harton wrote:
Some devices may not support or fail setting VLAN offload
configuration based on dynamic circurmstances so the
vlan_offload_set_t vector is modified to return an int so
the caller can determine success or not.

rte_eth_dev_set_vlan_offload is updated to return the
value provided by the vector when called along with restoring
the original offload configs on failure.

Existing vlan_offload_set_t vectors are modified to return
an int.  Majority of cases return 0 but a few that actually
can fail now return their failure codes.

Finally, a vlan_offload_set_t vector is added to virtio
to facilitate dynamically turning VLAN strip on or off.

Signed-off-by: David Harton <dhar...@cisco.com>
---

v4
* Modified commit message heading
* Moved rel_note comments from ABI to API section
* Renamed locals of rte_eth_dev_set_vlan_offload from 'org*' to 'orig*'

v3
* Fixed a format error.
* Apologies...need to figure out why checkpatches.pl keeps saying
  valid patch when I've got soft tabs.

v2
* Fixed a missed format error.
* Removed vlan offload vector call casts and replaced with checks
  for return values.

v1
* This is an ABI breakage that has been previously negotiated
  with Thomas and the proposed rel note change is included as well.

 doc/guides/rel_notes/release_17_11.rst |  8 +++++++-
 drivers/net/avp/avp_ethdev.c           | 12 +++++++++---
 drivers/net/bnxt/bnxt_ethdev.c         |  9 ++++++---
 drivers/net/dpaa2/dpaa2_ethdev.c       | 13 ++++++++++---
 drivers/net/e1000/em_ethdev.c          | 12 +++++++++---
 drivers/net/e1000/igb_ethdev.c         | 12 +++++++++---
 drivers/net/enic/enic_ethdev.c         |  8 +++++---
 drivers/net/fm10k/fm10k_ethdev.c       |  3 ++-
 drivers/net/i40e/i40e_ethdev.c         | 11 ++++++++---
 drivers/net/i40e/i40e_ethdev_vf.c      |  9 ++++++---
 drivers/net/ixgbe/ixgbe_ethdev.c       | 25 ++++++++++++++++++-------
 drivers/net/mlx5/mlx5.h                |  2 +-
 drivers/net/mlx5/mlx5_vlan.c           |  3 ++-
 drivers/net/nfp/nfp_net.c              | 13 +++++++------
 drivers/net/qede/qede_ethdev.c         |  9 +++++++--
 drivers/net/virtio/virtio_ethdev.c     | 21 +++++++++++++++++++++
 drivers/net/vmxnet3/vmxnet3_ethdev.c   | 10 +++++++---
 lib/librte_ether/rte_ethdev.c          | 28 ++++++++++++++++++++--------
 lib/librte_ether/rte_ethdev.h          |  2 +-
 19 files changed, 155 insertions(+), 55 deletions(-)

diff --git a/doc/guides/rel_notes/release_17_11.rst 
b/doc/guides/rel_notes/release_17_11.rst
index 170f4f9..22df4fd 100644
--- a/doc/guides/rel_notes/release_17_11.rst
+++ b/doc/guides/rel_notes/release_17_11.rst
@@ -110,6 +110,13 @@ API Changes
    Also, make sure to start the actual text at the margin.
    =========================================================

+* **Modified the vlan_offload_set_t function prototype in the ethdev library.**
+
+  Changed the function prototype of ``vlan_offload_set_t``.  The return value
+  has been changed from ``void`` to ``int`` so the caller to knows whether
+  the backing device supports the operation or if the operation was
+  successfully performed.
+

 ABI Changes
 -----------
@@ -125,7 +132,6 @@ ABI Changes
    =========================================================


-
 Shared Library Versions
 -----------------------

diff --git a/drivers/net/avp/avp_ethdev.c b/drivers/net/avp/avp_ethdev.c
index c746a0e..4011dfa 100644
--- a/drivers/net/avp/avp_ethdev.c
+++ b/drivers/net/avp/avp_ethdev.c
@@ -70,7 +70,7 @@ static int avp_dev_create(struct rte_pci_device *pci_dev,
 static void avp_dev_close(struct rte_eth_dev *dev);
 static void avp_dev_info_get(struct rte_eth_dev *dev,
                             struct rte_eth_dev_info *dev_info);
-static void avp_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int avp_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static int avp_dev_link_update(struct rte_eth_dev *dev, int wait_to_complete);
 static void avp_dev_promiscuous_enable(struct rte_eth_dev *dev);
 static void avp_dev_promiscuous_disable(struct rte_eth_dev *dev);
@@ -2031,7 +2031,12 @@ struct avp_queue {
        mask = (ETH_VLAN_STRIP_MASK |
                ETH_VLAN_FILTER_MASK |
                ETH_VLAN_EXTEND_MASK);
-       avp_vlan_offload_set(eth_dev, mask);
+       ret = avp_vlan_offload_set(eth_dev, mask);
+       if (ret < 0) {
+               PMD_DRV_LOG(ERR, "VLAN offload set failed by host, ret=%d\n",
+                           ret);
+               goto unlock;
+       }

        /* update device config */
        memset(&config, 0, sizeof(config));
@@ -2214,7 +2219,7 @@ struct avp_queue {
        }
 }

-static void
+static int
 avp_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
 {
        struct avp_dev *avp = AVP_DEV_PRIVATE_TO_HW(eth_dev->data->dev_private);
@@ -2239,6 +2244,7 @@ struct avp_queue {
                if (eth_dev->data->dev_conf.rxmode.hw_vlan_extend)
                        PMD_DRV_LOG(ERR, "VLAN extend offload not supported\n");
        }
+       return 0;
 }

 static void
diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index c9d1122..547bd55 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -144,7 +144,7 @@
        ETH_RSS_NONFRAG_IPV6_TCP |      \
        ETH_RSS_NONFRAG_IPV6_UDP)

-static void bnxt_vlan_offload_set_op(struct rte_eth_dev *dev, int mask);
+static int bnxt_vlan_offload_set_op(struct rte_eth_dev *dev, int mask);

 /***********************/

@@ -522,7 +522,9 @@ static int bnxt_dev_start_op(struct rte_eth_dev *eth_dev)
                vlan_mask |= ETH_VLAN_FILTER_MASK;
        if (eth_dev->data->dev_conf.rxmode.hw_vlan_strip)
                vlan_mask |= ETH_VLAN_STRIP_MASK;
-       bnxt_vlan_offload_set_op(eth_dev, vlan_mask);
+       rc = bnxt_vlan_offload_set_op(eth_dev, vlan_mask);
+       if (rc)
+               goto error;

        return 0;

@@ -1275,7 +1277,7 @@ static int bnxt_vlan_filter_set_op(struct rte_eth_dev 
*eth_dev,
                return bnxt_del_vlan_filter(bp, vlan_id);
 }

-static void
+static int
 bnxt_vlan_offload_set_op(struct rte_eth_dev *dev, int mask)
 {
        struct bnxt *bp = (struct bnxt *)dev->data->dev_private;
@@ -1307,6 +1309,7 @@ static int bnxt_vlan_filter_set_op(struct rte_eth_dev 
*eth_dev,

        if (mask & ETH_VLAN_EXTEND_MASK)
                RTE_LOG(ERR, PMD, "Extend VLAN Not supported\n");
+       return 0;
 }

 static void
diff --git a/drivers/net/dpaa2/dpaa2_ethdev.c b/drivers/net/dpaa2/dpaa2_ethdev.c
index 429b3a0..3390cb3 100644
--- a/drivers/net/dpaa2/dpaa2_ethdev.c
+++ b/drivers/net/dpaa2/dpaa2_ethdev.c
@@ -138,7 +138,7 @@
        return ret;
 }

-static void
+static int
 dpaa2_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        struct dpaa2_dev_priv *priv = dev->data->dev_private;
@@ -158,6 +158,7 @@
                        RTE_LOG(ERR, PMD, "Unable to set vlan filter = %d\n",
                                ret);
        }
+       return 0;
 }

 static int
@@ -643,8 +644,14 @@
                return ret;
        }
        /* VLAN Offload Settings */
-       if (priv->max_vlan_filters)
-               dpaa2_vlan_offload_set(dev, ETH_VLAN_FILTER_MASK);
+       if (priv->max_vlan_filters) {
+               ret = dpaa2_vlan_offload_set(dev, ETH_VLAN_FILTER_MASK);
+               if (ret) {
+                       PMD_INIT_LOG(ERR, "Error to dpaa2_vlan_offload_set:"
+                                    "code = %d\n", ret);
+                       return ret;
+               }
+       }

        return 0;
 }
diff --git a/drivers/net/e1000/em_ethdev.c b/drivers/net/e1000/em_ethdev.c
index 3d4ab93..51f49d8 100644
--- a/drivers/net/e1000/em_ethdev.c
+++ b/drivers/net/e1000/em_ethdev.c
@@ -99,7 +99,7 @@ static int eth_em_interrupt_action(struct rte_eth_dev *dev,

 static int eth_em_vlan_filter_set(struct rte_eth_dev *dev,
                uint16_t vlan_id, int on);
-static void eth_em_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int eth_em_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static void em_vlan_hw_filter_enable(struct rte_eth_dev *dev);
 static void em_vlan_hw_filter_disable(struct rte_eth_dev *dev);
 static void em_vlan_hw_strip_enable(struct rte_eth_dev *dev);
@@ -668,7 +668,12 @@ static int eth_em_pci_remove(struct rte_pci_device 
*pci_dev)

        mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK | \
                        ETH_VLAN_EXTEND_MASK;
-       eth_em_vlan_offload_set(dev, mask);
+       ret = eth_em_vlan_offload_set(dev, mask);
+       if (ret) {
+               PMD_INIT_LOG(ERR, "Unable to update vlan offload");
+               em_dev_clear_queues(dev);
+               return ret;
+       }

        /* Set Interrupt Throttling Rate to maximum allowed value. */
        E1000_WRITE_REG(hw, E1000_ITR, UINT16_MAX);
@@ -1447,7 +1452,7 @@ static int eth_em_pci_remove(struct rte_pci_device 
*pci_dev)
        E1000_WRITE_REG(hw, E1000_CTRL, reg);
 }

-static void
+static int
 eth_em_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        if(mask & ETH_VLAN_STRIP_MASK){
@@ -1463,6 +1468,7 @@ static int eth_em_pci_remove(struct rte_pci_device 
*pci_dev)
                else
                        em_vlan_hw_filter_disable(dev);
        }
+       return 0;
 }

 /*
diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
index e4f7a9f..fa15ee9 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -157,7 +157,7 @@ static int eth_igb_vlan_filter_set(struct rte_eth_dev *dev,
 static int eth_igb_vlan_tpid_set(struct rte_eth_dev *dev,
                                 enum rte_vlan_type vlan_type,
                                 uint16_t tpid_id);
-static void eth_igb_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int eth_igb_vlan_offload_set(struct rte_eth_dev *dev, int mask);

 static void igb_vlan_hw_filter_enable(struct rte_eth_dev *dev);
 static void igb_vlan_hw_filter_disable(struct rte_eth_dev *dev);
@@ -1400,7 +1400,12 @@ static int eth_igbvf_pci_remove(struct rte_pci_device 
*pci_dev)
         */
        mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK | \
                        ETH_VLAN_EXTEND_MASK;
-       eth_igb_vlan_offload_set(dev, mask);
+       ret = eth_igb_vlan_offload_set(dev, mask);
+       if (ret) {
+               PMD_INIT_LOG(ERR, "Unable to set vlan offload");
+               igb_dev_clear_queues(dev);
+               return ret;
+       }

        if (dev->data->dev_conf.rxmode.mq_mode == ETH_MQ_RX_VMDQ_ONLY) {
                /* Enable VLAN filter since VMDq always use VLAN filter */
@@ -2715,7 +2720,7 @@ static int eth_igbvf_xstats_get_names(__rte_unused struct 
rte_eth_dev *dev,
                                                2 * VLAN_TAG_SIZE);
 }

-static void
+static int
 eth_igb_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        if(mask & ETH_VLAN_STRIP_MASK){
@@ -2738,6 +2743,7 @@ static int eth_igbvf_xstats_get_names(__rte_unused struct 
rte_eth_dev *dev,
                else
                        igb_vlan_hw_extend_disable(dev);
        }
+       return 0;
 }


diff --git a/drivers/net/enic/enic_ethdev.c b/drivers/net/enic/enic_ethdev.c
index da8fec2..fc1eac2 100644
--- a/drivers/net/enic/enic_ethdev.c
+++ b/drivers/net/enic/enic_ethdev.c
@@ -347,7 +347,7 @@ static int enicpmd_vlan_filter_set(struct rte_eth_dev 
*eth_dev,
        return err;
 }

-static void enicpmd_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
+static int enicpmd_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
 {
        struct enic *enic = pmd_priv(eth_dev);

@@ -371,6 +371,8 @@ static void enicpmd_vlan_offload_set(struct rte_eth_dev 
*eth_dev, int mask)
                dev_warning(enic,
                        "Configuration of extended VLAN is not supported\n");
        }
+
+       return 0;
 }

 static int enicpmd_dev_configure(struct rte_eth_dev *eth_dev)
@@ -392,9 +394,9 @@ static int enicpmd_dev_configure(struct rte_eth_dev 
*eth_dev)
                        eth_dev->data->dev_conf.rxmode.split_hdr_size);
        }

-       enicpmd_vlan_offload_set(eth_dev, ETH_VLAN_STRIP_MASK);
+       ret = enicpmd_vlan_offload_set(eth_dev, ETH_VLAN_STRIP_MASK);
        enic->hw_ip_checksum = eth_dev->data->dev_conf.rxmode.hw_ip_checksum;
-       return 0;
+       return ret;
 }

 /* Start the device.
diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index e60d3a3..f4626f7 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -1590,7 +1590,7 @@ static int fm10k_xstats_get_names(__rte_unused struct 
rte_eth_dev *dev,
        return 0;
 }

-static void
+static int
 fm10k_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        if (mask & ETH_VLAN_STRIP_MASK) {
@@ -1609,6 +1609,7 @@ static int fm10k_xstats_get_names(__rte_unused struct 
rte_eth_dev *dev,
                if (!dev->data->dev_conf.rxmode.hw_vlan_filter)
                        PMD_INIT_LOG(ERR, "VLAN filter is always on in fm10k");
        }
+       return 0;
 }

 /* Add/Remove a MAC address, and update filters to main VSI */
diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 00b6082..d03a44b 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -278,7 +278,7 @@ static int i40e_vlan_filter_set(struct rte_eth_dev *dev,
 static int i40e_vlan_tpid_set(struct rte_eth_dev *dev,
                              enum rte_vlan_type vlan_type,
                              uint16_t tpid);
-static void i40e_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int i40e_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static void i40e_vlan_strip_queue_set(struct rte_eth_dev *dev,
                                      uint16_t queue,
                                      int on);
@@ -3130,7 +3130,7 @@ static int i40e_dev_xstats_get_names(__rte_unused struct 
rte_eth_dev *dev,
        return ret;
 }

-static void
+static int
 i40e_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
@@ -3163,6 +3163,7 @@ static int i40e_dev_xstats_get_names(__rte_unused struct 
rte_eth_dev *dev,
                else
                        i40e_vsi_config_double_vlan(vsi, FALSE);
        }
+       return 0;
 }

 static void
@@ -5216,7 +5217,11 @@ struct i40e_vsi *

        /* Apply vlan offload setting */
        mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK;
-       i40e_vlan_offload_set(dev, mask);
+       ret = i40e_vlan_offload_set(dev, mask);
+       if (ret) {
+               PMD_DRV_LOG(INFO, "Failed to update vlan offload");
+               return ret;
+       }

        /* Apply double-vlan setting, not implemented yet */

diff --git a/drivers/net/i40e/i40e_ethdev_vf.c 
b/drivers/net/i40e/i40e_ethdev_vf.c
index f6d8293..f7fffc2 100644
--- a/drivers/net/i40e/i40e_ethdev_vf.c
+++ b/drivers/net/i40e/i40e_ethdev_vf.c
@@ -118,7 +118,7 @@ static int i40evf_dev_xstats_get_names(struct rte_eth_dev 
*dev,
 static void i40evf_dev_xstats_reset(struct rte_eth_dev *dev);
 static int i40evf_vlan_filter_set(struct rte_eth_dev *dev,
                                  uint16_t vlan_id, int on);
-static void i40evf_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int i40evf_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static int i40evf_vlan_pvid_set(struct rte_eth_dev *dev, uint16_t pvid,
                                int on);
 static void i40evf_dev_close(struct rte_eth_dev *dev);
@@ -1634,7 +1634,9 @@ static int eth_i40evf_pci_remove(struct rte_pci_device 
*pci_dev)
        int ret;

        /* Apply vlan offload setting */
-       i40evf_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK);
+       ret = i40evf_vlan_offload_set(dev, ETH_VLAN_STRIP_MASK);
+       if (ret)
+               return ret;

        /* Apply pvid setting */
        ret = i40evf_vlan_pvid_set(dev, data->dev_conf.txmode.pvid,
@@ -1642,7 +1644,7 @@ static int eth_i40evf_pci_remove(struct rte_pci_device 
*pci_dev)
        return ret;
 }

-static void
+static int
 i40evf_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        struct rte_eth_conf *dev_conf = &dev->data->dev_conf;
@@ -1655,6 +1657,7 @@ static int eth_i40evf_pci_remove(struct rte_pci_device 
*pci_dev)
                else
                        i40evf_disable_vlan_strip(dev);
        }
+       return 0;
 }

 static int
diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 22171d8..1ec5aaf 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -218,7 +218,7 @@ static void ixgbe_vlan_hw_strip_bitmap_set(struct 
rte_eth_dev *dev,
                uint16_t queue, bool on);
 static void ixgbe_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue,
                int on);
-static void ixgbe_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int ixgbe_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static void ixgbe_vlan_hw_strip_enable(struct rte_eth_dev *dev, uint16_t 
queue);
 static void ixgbe_vlan_hw_strip_disable(struct rte_eth_dev *dev, uint16_t 
queue);
 static void ixgbe_vlan_hw_extend_enable(struct rte_eth_dev *dev);
@@ -274,7 +274,7 @@ static int ixgbevf_vlan_filter_set(struct rte_eth_dev *dev,
                uint16_t vlan_id, int on);
 static void ixgbevf_vlan_strip_queue_set(struct rte_eth_dev *dev,
                uint16_t queue, int on);
-static void ixgbevf_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int ixgbevf_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static void ixgbevf_set_vfta_all(struct rte_eth_dev *dev, bool on);
 static int ixgbevf_dev_rx_queue_intr_enable(struct rte_eth_dev *dev,
                                            uint16_t queue_id);
@@ -2125,7 +2125,7 @@ static int eth_ixgbevf_pci_remove(struct rte_pci_device 
*pci_dev)
         */
 }

-static void
+static int
 ixgbe_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        if (mask & ETH_VLAN_STRIP_MASK) {
@@ -2148,6 +2148,7 @@ static int eth_ixgbevf_pci_remove(struct rte_pci_device 
*pci_dev)
                else
                        ixgbe_vlan_hw_extend_disable(dev);
        }
+       return 0;
 }

 static void
@@ -2568,9 +2569,13 @@ static int eth_ixgbevf_pci_remove(struct rte_pci_device 
*pci_dev)
                goto error;
        }

-    mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK |
+       mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK |
                ETH_VLAN_EXTEND_MASK;
-       ixgbe_vlan_offload_set(dev, mask);
+       err = ixgbe_vlan_offload_set(dev, mask);
+       if (err) {
+               PMD_INIT_LOG(ERR, "Unable to set VLAN offload");
+               goto error;
+       }

        if (dev->data->dev_conf.rxmode.mq_mode == ETH_MQ_RX_VMDQ_ONLY) {
                /* Enable vlan filtering for VMDq */
@@ -4993,7 +4998,12 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused 
struct rte_eth_dev *dev,
        /* Set HW strip */
        mask = ETH_VLAN_STRIP_MASK | ETH_VLAN_FILTER_MASK |
                ETH_VLAN_EXTEND_MASK;
-       ixgbevf_vlan_offload_set(dev, mask);
+       err = ixgbevf_vlan_offload_set(dev, mask);
+       if (err) {
+               PMD_INIT_LOG(ERR, "Unable to set VLAN offload (%d)", err);
+               ixgbe_dev_clear_queues(dev);
+               return err;
+       }

        ixgbevf_dev_rxtx_start(dev);

@@ -5153,7 +5163,7 @@ static void ixgbevf_set_vfta_all(struct rte_eth_dev *dev, 
bool on)
        ixgbe_vlan_hw_strip_bitmap_set(dev, queue, on);
 }

-static void
+static int
 ixgbevf_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        struct ixgbe_hw *hw =
@@ -5168,6 +5178,7 @@ static void ixgbevf_set_vfta_all(struct rte_eth_dev *dev, 
bool on)
                for (i = 0; i < hw->mac.max_rx_queues; i++)
                        ixgbevf_vlan_strip_queue_set(dev, i, on);
        }
+       return 0;
 }

 int
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 43c5384..93e71be 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -283,7 +283,7 @@ int mlx5_xstats_get_names(struct rte_eth_dev *,
 /* mlx5_vlan.c */

 int mlx5_vlan_filter_set(struct rte_eth_dev *, uint16_t, int);
-void mlx5_vlan_offload_set(struct rte_eth_dev *, int);
+int mlx5_vlan_offload_set(struct rte_eth_dev *, int);
 void mlx5_vlan_strip_queue_set(struct rte_eth_dev *, uint16_t, int);

 /* mlx5_trigger.c */
diff --git a/drivers/net/mlx5/mlx5_vlan.c b/drivers/net/mlx5/mlx5_vlan.c
index 1b0fa40..7215909 100644
--- a/drivers/net/mlx5/mlx5_vlan.c
+++ b/drivers/net/mlx5/mlx5_vlan.c
@@ -210,7 +210,7 @@
  * @param mask
  *   VLAN offload bit mask.
  */
-void
+int
 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        struct priv *priv = dev->data->dev_private;
@@ -230,4 +230,5 @@
                        priv_vlan_strip_queue_set(priv, i, hw_vlan_strip);
                priv_unlock(priv);
        }
+       return 0;
 }
diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
index 92b03c4..6473edc 100644
--- a/drivers/net/nfp/nfp_net.c
+++ b/drivers/net/nfp/nfp_net.c
@@ -2149,11 +2149,12 @@ uint32_t nfp_net_txq_full(struct nfp_net_txq *txq)
        return i;
 }

-static void
+static int
 nfp_net_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        uint32_t new_ctrl, update;
        struct nfp_net_hw *hw;
+       int ret;

        hw = NFP_NET_DEV_PRIVATE_TO_HW(dev->data->dev_private);
        new_ctrl = 0;
@@ -2174,14 +2175,14 @@ uint32_t nfp_net_txq_full(struct nfp_net_txq *txq)
                new_ctrl = hw->ctrl & ~NFP_NET_CFG_CTRL_RXVLAN;

        if (new_ctrl == 0)
-               return;
+               return 0;

        update = NFP_NET_CFG_UPDATE_GEN;

-       if (nfp_net_reconfig(hw, new_ctrl, update) < 0)
-               return;
-
-       hw->ctrl = new_ctrl;
+       ret = nfp_net_reconfig(hw, new_ctrl, update);
+       if (!ret)
+               hw->ctrl = new_ctrl;
+       return ret;
 }

 /* Update Redirection Table(RETA) of Receive Side Scaling of Ethernet device */
diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethdev.c
index 0e05989..644f69d 100644
--- a/drivers/net/qede/qede_ethdev.c
+++ b/drivers/net/qede/qede_ethdev.c
@@ -975,7 +975,7 @@ static int qede_vlan_filter_set(struct rte_eth_dev *eth_dev,
        return rc;
 }

-static void qede_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
+static int qede_vlan_offload_set(struct rte_eth_dev *eth_dev, int mask)
 {
        struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
        struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
@@ -1013,6 +1013,8 @@ static void qede_vlan_offload_set(struct rte_eth_dev 
*eth_dev, int mask)

        DP_INFO(edev, "vlan offload mask %d vlan-strip %d vlan-filter %d\n",
                mask, rxmode->hw_vlan_strip, rxmode->hw_vlan_filter);
+
+       return 0;
 }

 static void qede_prandom_bytes(uint32_t *buff)
@@ -1157,6 +1159,7 @@ static int qede_dev_configure(struct rte_eth_dev *eth_dev)
        struct qede_dev *qdev = QEDE_INIT_QDEV(eth_dev);
        struct ecore_dev *edev = QEDE_INIT_EDEV(qdev);
        struct rte_eth_rxmode *rxmode = &eth_dev->data->dev_conf.rxmode;
+       int ret;

        PMD_INIT_FUNC_TRACE(edev);

@@ -1237,9 +1240,11 @@ static int qede_dev_configure(struct rte_eth_dev 
*eth_dev)
        qdev->enable_lro = rxmode->enable_lro;

        /* Enable VLAN offloads by default */
-       qede_vlan_offload_set(eth_dev, ETH_VLAN_STRIP_MASK  |
+       ret = qede_vlan_offload_set(eth_dev, ETH_VLAN_STRIP_MASK  |
                        ETH_VLAN_FILTER_MASK |
                        ETH_VLAN_EXTEND_MASK);
+       if (ret)
+               return ret;

        DP_INFO(edev, "Device configured with RSS=%d TSS=%d\n",
                        QEDE_RSS_COUNT(qdev), QEDE_TSS_COUNT(qdev));
diff --git a/drivers/net/virtio/virtio_ethdev.c 
b/drivers/net/virtio/virtio_ethdev.c
index e320811..72b4248 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -72,6 +72,7 @@ static void virtio_dev_info_get(struct rte_eth_dev *dev,
                                struct rte_eth_dev_info *dev_info);
 static int virtio_dev_link_update(struct rte_eth_dev *dev,
        int wait_to_complete);
+static int virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);

 static void virtio_set_hwaddr(struct virtio_hw *hw);
 static void virtio_get_hwaddr(struct virtio_hw *hw);
@@ -779,6 +780,7 @@ struct rte_virtio_xstats_name_off {
        .stats_reset             = virtio_dev_stats_reset,
        .xstats_reset            = virtio_dev_stats_reset,
        .link_update             = virtio_dev_link_update,
+       .vlan_offload_set        = virtio_dev_vlan_offload_set,
        .rx_queue_setup          = virtio_dev_rx_queue_setup,
        .rx_queue_intr_enable    = virtio_dev_rx_queue_intr_enable,
        .rx_queue_intr_disable   = virtio_dev_rx_queue_intr_disable,
@@ -1875,6 +1877,25 @@ static void virtio_dev_free_mbufs(struct rte_eth_dev 
*dev)
        return (old.link_status == link.link_status) ? -1 : 0;
 }

+static int
+virtio_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
+{
+       const struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
+       struct virtio_hw *hw = dev->data->dev_private;
+
+       if (rxmode->hw_vlan_filter &&
+           !vtpci_with_feature(hw, VIRTIO_NET_F_CTRL_VLAN)) {
+               PMD_DRV_LOG(NOTICE,
+                           "vlan filtering not available on this host");
+               return -ENOTSUP;
+       }
+
+       if (mask & ETH_VLAN_STRIP_MASK)
+               hw->vlan_strip = rxmode->hw_vlan_strip;
+
+       return 0;
+}
+
 static void
 virtio_dev_info_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
 {
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c 
b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 3910991..06735dd 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -100,7 +100,7 @@ static void vmxnet3_dev_info_get(struct rte_eth_dev *dev,
 vmxnet3_dev_supported_ptypes_get(struct rte_eth_dev *dev);
 static int vmxnet3_dev_vlan_filter_set(struct rte_eth_dev *dev,
                                       uint16_t vid, int on);
-static void vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
+static int vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask);
 static void vmxnet3_mac_addr_set(struct rte_eth_dev *dev,
                                 struct ether_addr *mac_addr);
 static void vmxnet3_interrupt_handler(void *param);
@@ -730,8 +730,10 @@ static int eth_vmxnet3_pci_remove(struct rte_pci_device 
*pci_dev)
                devRead->rssConfDesc.confPA  = hw->rss_confPA;
        }

-       vmxnet3_dev_vlan_offload_set(dev,
+       ret = vmxnet3_dev_vlan_offload_set(dev,
                                     ETH_VLAN_STRIP_MASK | 
ETH_VLAN_FILTER_MASK);
+       if (ret)
+               return ret;

        vmxnet3_write_mac(hw, dev->data->mac_addrs->addr_bytes);

@@ -1275,7 +1277,7 @@ static int eth_vmxnet3_pci_remove(struct rte_pci_device 
*pci_dev)
        return 0;
 }

-static void
+static int
 vmxnet3_dev_vlan_offload_set(struct rte_eth_dev *dev, int mask)
 {
        struct vmxnet3_hw *hw = dev->data->dev_private;
@@ -1301,6 +1303,8 @@ static int eth_vmxnet3_pci_remove(struct rte_pci_device 
*pci_dev)
                VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD,
                                       VMXNET3_CMD_UPDATE_VLAN_FILTERS);
        }
+
+       return 0;
 }

 static void
diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
index 0597641..05e52b8 100644
--- a/lib/librte_ether/rte_ethdev.c
+++ b/lib/librte_ether/rte_ethdev.c
@@ -2048,29 +2048,35 @@ struct rte_eth_dev *
        struct rte_eth_dev *dev;
        int ret = 0;
        int mask = 0;
-       int cur, org = 0;
+       int cur, orig = 0;
+       uint8_t orig_strip, orig_filter, orig_extend;

        RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
        dev = &rte_eth_devices[port_id];

+       /* save original values in case of failure */
+       orig_strip = dev->data->dev_conf.rxmode.hw_vlan_strip;
+       orig_filter = dev->data->dev_conf.rxmode.hw_vlan_filter;
+       orig_extend = dev->data->dev_conf.rxmode.hw_vlan_extend;
+
        /*check which option changed by application*/
        cur = !!(offload_mask & ETH_VLAN_STRIP_OFFLOAD);
-       org = !!(dev->data->dev_conf.rxmode.hw_vlan_strip);
-       if (cur != org) {
+       orig = !!(dev->data->dev_conf.rxmode.hw_vlan_strip);
+       if (cur != orig) {
                dev->data->dev_conf.rxmode.hw_vlan_strip = (uint8_t)cur;
                mask |= ETH_VLAN_STRIP_MASK;
        }

        cur = !!(offload_mask & ETH_VLAN_FILTER_OFFLOAD);
-       org = !!(dev->data->dev_conf.rxmode.hw_vlan_filter);
-       if (cur != org) {
+       orig = !!(dev->data->dev_conf.rxmode.hw_vlan_filter);
+       if (cur != orig) {
                dev->data->dev_conf.rxmode.hw_vlan_filter = (uint8_t)cur;
                mask |= ETH_VLAN_FILTER_MASK;
        }

        cur = !!(offload_mask & ETH_VLAN_EXTEND_OFFLOAD);
-       org = !!(dev->data->dev_conf.rxmode.hw_vlan_extend);
-       if (cur != org) {
+       orig = !!(dev->data->dev_conf.rxmode.hw_vlan_extend);
+       if (cur != orig) {
                dev->data->dev_conf.rxmode.hw_vlan_extend = (uint8_t)cur;
                mask |= ETH_VLAN_EXTEND_MASK;
        }
@@ -2080,7 +2086,13 @@ struct rte_eth_dev *
                return ret;

        RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->vlan_offload_set, -ENOTSUP);
-       (*dev->dev_ops->vlan_offload_set)(dev, mask);
+       ret = (*dev->dev_ops->vlan_offload_set)(dev, mask);
+       if (ret) {
+               /* hit an error restore  original values */
+               dev->data->dev_conf.rxmode.hw_vlan_strip = orig_strip;
+               dev->data->dev_conf.rxmode.hw_vlan_filter = orig_filter;
+               dev->data->dev_conf.rxmode.hw_vlan_extend = orig_extend;
+       }

Currently vlan offload is combining three functions:
strip, filter and extend.

Not all PMDs in DPDK support all of three.
Should not the error we extended to reflect, which of the VLAN offload is not supported?

        return ret;
 }
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 0adf327..7254fd0 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1245,7 +1245,7 @@ typedef int (*vlan_tpid_set_t)(struct rte_eth_dev *dev,
                               enum rte_vlan_type type, uint16_t tpid);
 /**< @internal set the outer/inner VLAN-TPID by an Ethernet device. */

-typedef void (*vlan_offload_set_t)(struct rte_eth_dev *dev, int mask);
+typedef int (*vlan_offload_set_t)(struct rte_eth_dev *dev, int mask);
 /**< @internal set VLAN offload function by an Ethernet device. */

 typedef int (*vlan_pvid_set_t)(struct rte_eth_dev *dev,


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