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Message-ID: <5f8c0c22-b98c-9a59-a6d3-5312df63e9d9@huawei.com>
Date: Mon, 12 Jul 2021 11:41:37 +0800
From: "shenjian (K)" <shenjian15@...wei.com>
To: Heiner Kallweit <hkallweit1@...il.com>, <davem@...emloft.net>,
<kuba@...nel.org>
CC: <netdev@...r.kernel.org>, <linuxarm@...neuler.org>,
"shenjian15@...wei.com" <shenjian15@...wei.com>
Subject: Re: [RFC net-next] net: extend netdev features
在 2021/7/11 3:05, Heiner Kallweit 写道:
> On 10.07.2021 11:40, Jian Shen wrote:
>> For the prototype of netdev_features_t is u64, and the number
>> of netdevice feature bits is 64 now. So there is no space to
>> introduce new feature bit.
>>
>> I did a small change for this. Keep the prototype of
>> netdev_feature_t, and extend the feature members in struct
>> net_device to an array of netdev_features_t. So more features
>> bits can be used.
>>
>> As this change, some functions which use netdev_features_t as
>> parameter or returen value will be affected.
>> I did below changes:
>> a. parameter: "netdev_features_t" to "netdev_features_t *"
>> b. return value: "netdev_feature_t" to "void", and add
>> "netdev_feature_t *" as output parameter.
>>
>> I kept some functions no change, which are surely useing the
>> first 64 bit of net device features now, such as function
>> nedev_add_tso_features(). In order to minimize to changes.
>>
>> For the features are array now, so it's unable to do logical
>> operation directly. I introduce a inline function set for
>> them, including "netdev_features_and/andnot/or/xor/equal/empty".
>>
>> For NETDEV_FEATURE_COUNT may be more than 64, so the shift
>> operation for NETDEV_FEATURE_COUNT is illegal. I changed some
>> macroes and functions, which does shift opertion with it.
>>
>> I haven't finished all the changes, for it affected all the
>> drivers which use the feature, need more time and test. I
>> sent this RFC patch, want to know whether this change is
>> acceptable, and how to improve it.
>>
>> Any comments will be helpful.
>>
>> Signed-off-by: Jian Shen <shenjian15@...wei.com>
>> ---
>> drivers/net/ethernet/hisilicon/hns/hns_enet.c | 34 +--
>> drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 97 ++++-----
>> drivers/net/ethernet/huawei/hinic/hinic_main.c | 71 +++---
>> drivers/net/ethernet/huawei/hinic/hinic_rx.c | 4 +-
>> include/linux/if_vlan.h | 2 +-
>> include/linux/netdev_features.h | 105 ++++++++-
>> include/linux/netdevice.h | 31 +--
>> net/8021q/vlan.c | 4 +-
>> net/8021q/vlan.h | 2 +-
>> net/8021q/vlan_dev.c | 49 +++--
>> net/core/dev.c | 276 ++++++++++++------------
>> net/core/netpoll.c | 6 +-
>> net/ethtool/features.c | 56 +++--
>> net/ethtool/ioctl.c | 93 +++++---
>> 14 files changed, 493 insertions(+), 337 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
>> index ad534f9..4f245cf 100644
>> --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
>> +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
>> @@ -479,7 +479,7 @@ static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
>> u32 l4id;
>>
>> /* check if RX checksum offload is enabled */
>> - if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
>> + if (unlikely(!(netdev->features[0] & NETIF_F_RXCSUM)))
>> return;
>>
>> /* In hardware, we only support checksum for the following protocols:
>> @@ -1768,17 +1768,17 @@ static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
>> }
>>
>> static int hns_nic_set_features(struct net_device *netdev,
>> - netdev_features_t features)
>> + netdev_features_t *features)
>> {
>> struct hns_nic_priv *priv = netdev_priv(netdev);
>>
>> switch (priv->enet_ver) {
>> case AE_VERSION_1:
>> - if (features & (NETIF_F_TSO | NETIF_F_TSO6))
>> + if (features[0] & (NETIF_F_TSO | NETIF_F_TSO6))
>> netdev_info(netdev, "enet v1 do not support tso!\n");
>> break;
>> default:
>> - if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
>> + if (features[0] & (NETIF_F_TSO | NETIF_F_TSO6)) {
>> priv->ops.fill_desc = fill_tso_desc;
>> priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
>> /* The chip only support 7*4096 */
>> @@ -1789,24 +1789,23 @@ static int hns_nic_set_features(struct net_device *netdev,
>> }
>> break;
>> }
>> - netdev->features = features;
>> + netdev->features[0] = features[0];
>> return 0;
>> }
>>
>> -static netdev_features_t hns_nic_fix_features(
>> - struct net_device *netdev, netdev_features_t features)
>> +static void hns_nic_fix_features(struct net_device *netdev,
>> + netdev_features_t *features)
>> {
>> struct hns_nic_priv *priv = netdev_priv(netdev);
>>
>> switch (priv->enet_ver) {
>> case AE_VERSION_1:
>> - features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
>> + features[0] &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
>> NETIF_F_HW_VLAN_CTAG_FILTER);
>> break;
>> default:
>> break;
>> }
>> - return features;
>> }
>>
>> static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
>> @@ -2163,8 +2162,8 @@ static void hns_nic_set_priv_ops(struct net_device *netdev)
>> priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
>> } else {
>> priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
>> - if ((netdev->features & NETIF_F_TSO) ||
>> - (netdev->features & NETIF_F_TSO6)) {
>> + if ((netdev->features[0] & NETIF_F_TSO) ||
>> + (netdev->features[0] & NETIF_F_TSO6)) {
>> priv->ops.fill_desc = fill_tso_desc;
>> priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
>> /* This chip only support 7*4096 */
>> @@ -2325,22 +2324,23 @@ static int hns_nic_dev_probe(struct platform_device *pdev)
>> ndev->netdev_ops = &hns_nic_netdev_ops;
>> hns_ethtool_set_ops(ndev);
>>
>> - ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
>> + ndev->features[0] |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
>> NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
>> NETIF_F_GRO;
>> - ndev->vlan_features |=
>> + ndev->vlan_features[0] |=
>> NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
>> - ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
>> + ndev->vlan_features[0] |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
>>
>> /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
>> ndev->min_mtu = MAC_MIN_MTU;
>> switch (priv->enet_ver) {
>> case AE_VERSION_2:
>> - ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
>> - ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
>> + ndev->features[0] |=
>> + NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
>> + ndev->hw_features[0] |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
>> NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
>> NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
>> - ndev->vlan_features |= NETIF_F_TSO | NETIF_F_TSO6;
>> + ndev->vlan_features[0] |= NETIF_F_TSO | NETIF_F_TSO6;
>> ndev->max_mtu = MAC_MAX_MTU_V2 -
>> (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
>> break;
>> diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
>> index cdb5f14..ba56907 100644
>> --- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
>> +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
>> @@ -1481,7 +1481,7 @@ static int hns3_handle_vtags(struct hns3_enet_ring *tx_ring,
>> return -EINVAL;
>>
>> if (skb->protocol == htons(ETH_P_8021Q) &&
>> - !(handle->kinfo.netdev->features & NETIF_F_HW_VLAN_CTAG_TX)) {
>> + !(handle->kinfo.netdev->features[0] & NETIF_F_HW_VLAN_CTAG_TX)) {
>> /* When HW VLAN acceleration is turned off, and the stack
>> * sets the protocol to 802.1q, the driver just need to
>> * set the protocol to the encapsulated ethertype.
>> @@ -2300,56 +2300,57 @@ static int hns3_nic_do_ioctl(struct net_device *netdev,
>> }
>>
>> static int hns3_nic_set_features(struct net_device *netdev,
>> - netdev_features_t features)
>> + netdev_features_t *features)
>> {
>> - netdev_features_t changed = netdev->features ^ features;
>> + netdev_features_t changed[NETDEV_FEATURE_DWORDS];
>> struct hns3_nic_priv *priv = netdev_priv(netdev);
>> struct hnae3_handle *h = priv->ae_handle;
>> bool enable;
>> int ret;
>>
>> - if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
>> - enable = !!(features & NETIF_F_GRO_HW);
>> + netdev_features_xor(changed, netdev->features, features);
>> + if (changed[0] & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
>> + enable = !!(features[0] & NETIF_F_GRO_HW);
>> ret = h->ae_algo->ops->set_gro_en(h, enable);
>> if (ret)
>> return ret;
>> }
>>
>> - if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
>> + if ((changed[0] & NETIF_F_HW_VLAN_CTAG_RX) &&
>> h->ae_algo->ops->enable_hw_strip_rxvtag) {
>> - enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
>> + enable = !!(features[0] & NETIF_F_HW_VLAN_CTAG_RX);
>> ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, enable);
>> if (ret)
>> return ret;
>> }
>>
>> - if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
>> - enable = !!(features & NETIF_F_NTUPLE);
>> + if ((changed[0] & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
>> + enable = !!(features[0] & NETIF_F_NTUPLE);
>> h->ae_algo->ops->enable_fd(h, enable);
>> }
>>
>> - if ((netdev->features & NETIF_F_HW_TC) > (features & NETIF_F_HW_TC) &&
>> + if ((netdev->features[0] & NETIF_F_HW_TC) >
>> + (features[0] & NETIF_F_HW_TC) &&
>> h->ae_algo->ops->cls_flower_active(h)) {
>> netdev_err(netdev,
>> "there are offloaded TC filters active, cannot disable HW TC offload");
>> return -EINVAL;
>> }
>>
>> - if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
>> + if ((changed[0] & NETIF_F_HW_VLAN_CTAG_FILTER) &&
>> h->ae_algo->ops->enable_vlan_filter) {
>> - enable = !!(features & NETIF_F_HW_VLAN_CTAG_FILTER);
>> + enable = !!(features[0] & NETIF_F_HW_VLAN_CTAG_FILTER);
>> ret = h->ae_algo->ops->enable_vlan_filter(h, enable);
>> if (ret)
>> return ret;
>> }
>>
>> - netdev->features = features;
>> + netdev_features_copy(netdev->features, features);
>> return 0;
>> }
>>
>> -static netdev_features_t hns3_features_check(struct sk_buff *skb,
>> - struct net_device *dev,
>> - netdev_features_t features)
>> +static void hns3_features_check(struct sk_buff *skb, struct net_device *dev,
>> + netdev_features_t *features)
>> {
>> #define HNS3_MAX_HDR_LEN 480U
>> #define HNS3_MAX_L4_HDR_LEN 60U
>> @@ -2373,9 +2374,7 @@ static netdev_features_t hns3_features_check(struct sk_buff *skb,
>> * len of 480 bytes.
>> */
>> if (len > HNS3_MAX_HDR_LEN)
>> - features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
>> -
>> - return features;
>> + features[0] &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
>> }
>>
>> static void hns3_nic_get_stats64(struct net_device *netdev,
>> @@ -3127,27 +3126,28 @@ static void hns3_set_default_feature(struct net_device *netdev)
>>
>> netdev->priv_flags |= IFF_UNICAST_FLT;
>>
>> - netdev->hw_enc_features |= NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
>> + netdev->hw_enc_features[0] |=
>> + NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
>> NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
>> NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_SCTP_CRC | NETIF_F_TSO_MANGLEID | NETIF_F_FRAGLIST;
>>
>> netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
>>
>> - netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
>> + netdev->features[0] |= NETIF_F_HW_VLAN_CTAG_FILTER |
>> NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
>> NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
>> NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
>> NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_SCTP_CRC | NETIF_F_FRAGLIST;
>>
>> - netdev->vlan_features |= NETIF_F_RXCSUM |
>> + netdev->vlan_features[0] |= NETIF_F_RXCSUM |
>> NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
>> NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
>> NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
>> NETIF_F_SCTP_CRC | NETIF_F_FRAGLIST;
>>
>> - netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_TX |
>> + netdev->hw_features[0] |= NETIF_F_HW_VLAN_CTAG_TX |
>> NETIF_F_HW_VLAN_CTAG_RX |
>> NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
>> NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
>> @@ -3155,48 +3155,49 @@ static void hns3_set_default_feature(struct net_device *netdev)
>> NETIF_F_SCTP_CRC | NETIF_F_FRAGLIST;
>>
>> if (ae_dev->dev_version >= HNAE3_DEVICE_VERSION_V2) {
>> - netdev->hw_features |= NETIF_F_GRO_HW;
>> - netdev->features |= NETIF_F_GRO_HW;
>> + netdev->hw_features[0] |= NETIF_F_GRO_HW;
>> + netdev->features[0] |= NETIF_F_GRO_HW;
>>
>> if (!(h->flags & HNAE3_SUPPORT_VF)) {
>> - netdev->hw_features |= NETIF_F_NTUPLE;
>> - netdev->features |= NETIF_F_NTUPLE;
>> + netdev->hw_features[0] |= NETIF_F_NTUPLE;
>> + netdev->features[0] |= NETIF_F_NTUPLE;
>> }
>> }
>>
>> if (test_bit(HNAE3_DEV_SUPPORT_UDP_GSO_B, ae_dev->caps)) {
>> - netdev->hw_features |= NETIF_F_GSO_UDP_L4;
>> - netdev->features |= NETIF_F_GSO_UDP_L4;
>> - netdev->vlan_features |= NETIF_F_GSO_UDP_L4;
>> - netdev->hw_enc_features |= NETIF_F_GSO_UDP_L4;
>> + netdev->hw_features[0] |= NETIF_F_GSO_UDP_L4;
>> + netdev->features[0] |= NETIF_F_GSO_UDP_L4;
>> + netdev->vlan_features[0] |= NETIF_F_GSO_UDP_L4;
>> + netdev->hw_enc_features[0] |= NETIF_F_GSO_UDP_L4;
>> }
>>
>> if (test_bit(HNAE3_DEV_SUPPORT_HW_TX_CSUM_B, ae_dev->caps)) {
>> - netdev->hw_features |= NETIF_F_HW_CSUM;
>> - netdev->features |= NETIF_F_HW_CSUM;
>> - netdev->vlan_features |= NETIF_F_HW_CSUM;
>> - netdev->hw_enc_features |= NETIF_F_HW_CSUM;
>> + netdev->hw_features[0] |= NETIF_F_HW_CSUM;
>> + netdev->features[0] |= NETIF_F_HW_CSUM;
>> + netdev->vlan_features[0] |= NETIF_F_HW_CSUM;
>> + netdev->hw_enc_features[0] |= NETIF_F_HW_CSUM;
>> } else {
>> - netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> - netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> - netdev->vlan_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> - netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> + netdev->hw_features[0] |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> + netdev->features[0] |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> + netdev->vlan_features[0] |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> + netdev->hw_enc_features[0] |=
>> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
>> }
>>
>> if (test_bit(HNAE3_DEV_SUPPORT_UDP_TUNNEL_CSUM_B, ae_dev->caps)) {
>> - netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> - netdev->features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> - netdev->vlan_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> - netdev->hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> + netdev->hw_features[0] |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> + netdev->features[0] |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> + netdev->vlan_features[0] |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> + netdev->hw_enc_features[0] |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> }
>>
>> if (test_bit(HNAE3_DEV_SUPPORT_FD_FORWARD_TC_B, ae_dev->caps)) {
>> - netdev->hw_features |= NETIF_F_HW_TC;
>> - netdev->features |= NETIF_F_HW_TC;
>> + netdev->hw_features[0] |= NETIF_F_HW_TC;
>> + netdev->features[0] |= NETIF_F_HW_TC;
>> }
>>
>> if (test_bit(HNAE3_DEV_SUPPORT_VLAN_FLTR_MDF_B, ae_dev->caps))
>> - netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
>> + netdev->hw_features[0] |= NETIF_F_HW_VLAN_CTAG_FILTER;
>> }
>>
>> static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
>> @@ -3727,7 +3728,7 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
>>
>> skb_checksum_none_assert(skb);
>>
>> - if (!(netdev->features & NETIF_F_RXCSUM))
>> + if (!(netdev->features[0] & NETIF_F_RXCSUM))
>> return;
>>
>> if (test_bit(HNS3_NIC_STATE_RXD_ADV_LAYOUT_ENABLE, &priv->state))
>> @@ -4024,7 +4025,7 @@ static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
>> * ot_vlan_tag in two layer tag case, and stored at vlan_tag
>> * in one layer tag case.
>> */
>> - if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
>> + if (netdev->features[0] & NETIF_F_HW_VLAN_CTAG_RX) {
>> u16 vlan_tag;
>>
>> if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
>> diff --git a/drivers/net/ethernet/huawei/hinic/hinic_main.c b/drivers/net/ethernet/huawei/hinic/hinic_main.c
>> index 405ee4d..b193ee4 100644
>> --- a/drivers/net/ethernet/huawei/hinic/hinic_main.c
>> +++ b/drivers/net/ethernet/huawei/hinic/hinic_main.c
>> @@ -79,8 +79,8 @@ MODULE_PARM_DESC(rx_weight, "Number Rx packets for NAPI budget (default=64)");
>> static int change_mac_addr(struct net_device *netdev, const u8 *addr);
>>
>> static int set_features(struct hinic_dev *nic_dev,
>> - netdev_features_t pre_features,
>> - netdev_features_t features, bool force_change);
>> + netdev_features_t *pre_features,
>> + netdev_features_t *features, bool force_change);
>>
>> static void update_rx_stats(struct hinic_dev *nic_dev, struct hinic_rxq *rxq)
>> {
>> @@ -880,7 +880,7 @@ static void hinic_get_stats64(struct net_device *netdev,
>> }
>>
>> static int hinic_set_features(struct net_device *netdev,
>> - netdev_features_t features)
>> + netdev_features_t *features)
>> {
>> struct hinic_dev *nic_dev = netdev_priv(netdev);
>>
>> @@ -888,18 +888,16 @@ static int hinic_set_features(struct net_device *netdev,
>> features, false);
>> }
>>
>> -static netdev_features_t hinic_fix_features(struct net_device *netdev,
>> - netdev_features_t features)
>> +static void hinic_fix_features(struct net_device *netdev,
>> + netdev_features_t features)
>> {
>> struct hinic_dev *nic_dev = netdev_priv(netdev);
>>
>> /* If Rx checksum is disabled, then LRO should also be disabled */
>> - if (!(features & NETIF_F_RXCSUM)) {
>> + if (!(features[0] & NETIF_F_RXCSUM)) {
>> netif_info(nic_dev, drv, netdev, "disabling LRO as RXCSUM is off\n");
>> - features &= ~NETIF_F_LRO;
>> + features[0] &= ~NETIF_F_LRO;
>> }
>> -
>> - return features;
>> }
>>
>> static const struct net_device_ops hinic_netdev_ops = {
>> @@ -943,19 +941,22 @@ static const struct net_device_ops hinicvf_netdev_ops = {
>>
>> static void netdev_features_init(struct net_device *netdev)
>> {
>> - netdev->hw_features = NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
>> - NETIF_F_IPV6_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
>> - NETIF_F_RXCSUM | NETIF_F_LRO |
>> - NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
>> - NETIF_F_GSO_UDP_TUNNEL | NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> -
>> - netdev->vlan_features = netdev->hw_features;
>> -
>> - netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
>> -
>> - netdev->hw_enc_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SCTP_CRC |
>> - NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN |
>> - NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_GSO_UDP_TUNNEL;
>> + netdev->hw_features[0] =
>> + NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
>> + NETIF_F_IPV6_CSUM | NETIF_F_TSO | NETIF_F_TSO6 |
>> + NETIF_F_RXCSUM | NETIF_F_LRO |
>> + NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
>> + NETIF_F_GSO_UDP_TUNNEL | NETIF_F_GSO_UDP_TUNNEL_CSUM;
>> +
>> + netdev_features_copy(netdev->vlan_features, netdev->hw_features);
>> +
>> + netdev->features[0] =
>> + netdev->hw_features[0] | NETIF_F_HW_VLAN_CTAG_FILTER;
>> +
>> + netdev->hw_enc_features[0] =
>> + NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SCTP_CRC |
>> + NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN |
>> + NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_GSO_UDP_TUNNEL;
>> }
>>
>> static void hinic_refresh_nic_cfg(struct hinic_dev *nic_dev)
>> @@ -1072,21 +1073,22 @@ static void link_err_event(void *handle,
>> }
>>
>> static int set_features(struct hinic_dev *nic_dev,
>> - netdev_features_t pre_features,
>> - netdev_features_t features, bool force_change)
>> + netdev_features_t *pre_features,
>> + netdev_features_t *features, bool force_change)
>> {
>> - netdev_features_t changed = force_change ? ~0 : pre_features ^ features;
>> + netdev_features_t failed_features[NETDEV_FEATURE_DWORDS] = {0};
>> u32 csum_en = HINIC_RX_CSUM_OFFLOAD_EN;
>> - netdev_features_t failed_features = 0;
>> + netdev_features_t changed;
>> int ret = 0;
>> int err = 0;
>>
>> + changed = force_change ? ~0 : pre_features[0] ^ features[0];
>> if (changed & NETIF_F_TSO) {
>> - ret = hinic_port_set_tso(nic_dev, (features & NETIF_F_TSO) ?
>> + ret = hinic_port_set_tso(nic_dev, (features[0] & NETIF_F_TSO) ?
>> HINIC_TSO_ENABLE : HINIC_TSO_DISABLE);
>> if (ret) {
>> err = ret;
>> - failed_features |= NETIF_F_TSO;
>> + failed_features[0] |= NETIF_F_TSO;
>> }
>> }
>>
>> @@ -1094,33 +1096,34 @@ static int set_features(struct hinic_dev *nic_dev,
>> ret = hinic_set_rx_csum_offload(nic_dev, csum_en);
>> if (ret) {
>> err = ret;
>> - failed_features |= NETIF_F_RXCSUM;
>> + failed_features[0] |= NETIF_F_RXCSUM;
>> }
>> }
>>
>> if (changed & NETIF_F_LRO) {
>> ret = hinic_set_rx_lro_state(nic_dev,
>> - !!(features & NETIF_F_LRO),
>> + !!(features[0] & NETIF_F_LRO),
>> HINIC_LRO_RX_TIMER_DEFAULT,
>> HINIC_LRO_MAX_WQE_NUM_DEFAULT);
>> if (ret) {
>> err = ret;
>> - failed_features |= NETIF_F_LRO;
>> + failed_features[0] |= NETIF_F_LRO;
>> }
>> }
>>
>> if (changed & NETIF_F_HW_VLAN_CTAG_RX) {
>> ret = hinic_set_rx_vlan_offload(nic_dev,
>> - !!(features &
>> + !!(features[0] &
>> NETIF_F_HW_VLAN_CTAG_RX));
>> if (ret) {
>> err = ret;
>> - failed_features |= NETIF_F_HW_VLAN_CTAG_RX;
>> + failed_features[0] |= NETIF_F_HW_VLAN_CTAG_RX;
>> }
>> }
>>
>> if (err) {
>> - nic_dev->netdev->features = features ^ failed_features;
>> + netdev_features_xor(nic_dev->netdev->features, features,
>> + failed_features)
>> return -EIO;
>> }
>>
>> diff --git a/drivers/net/ethernet/huawei/hinic/hinic_rx.c b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
>> index fed3b6b..452a91b 100644
>> --- a/drivers/net/ethernet/huawei/hinic/hinic_rx.c
>> +++ b/drivers/net/ethernet/huawei/hinic/hinic_rx.c
>> @@ -106,7 +106,7 @@ static void rx_csum(struct hinic_rxq *rxq, u32 status,
>>
>> csum_err = HINIC_RQ_CQE_STATUS_GET(status, CSUM_ERR);
>>
>> - if (!(netdev->features & NETIF_F_RXCSUM))
>> + if (!(netdev->features[0] & NETIF_F_RXCSUM))
>> return;
>>
>> if (!csum_err) {
>> @@ -411,7 +411,7 @@ static int rxq_recv(struct hinic_rxq *rxq, int budget)
>>
>> offload_type = be32_to_cpu(cqe->offload_type);
>> vlan_len = be32_to_cpu(cqe->len);
>> - if ((netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
>> + if ((netdev->features[0] & NETIF_F_HW_VLAN_CTAG_RX) &&
>> HINIC_GET_RX_VLAN_OFFLOAD_EN(offload_type)) {
>> vid = HINIC_GET_RX_VLAN_TAG(vlan_len);
>> __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
>> diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
>> index 41a5183..4173464 100644
>> --- a/include/linux/if_vlan.h
>> +++ b/include/linux/if_vlan.h
>> @@ -563,7 +563,7 @@ static inline int __vlan_hwaccel_get_tag(const struct sk_buff *skb,
>> */
>> static inline int vlan_get_tag(const struct sk_buff *skb, u16 *vlan_tci)
>> {
>> - if (skb->dev->features & NETIF_F_HW_VLAN_CTAG_TX) {
>> + if (skb->dev->features[0] & NETIF_F_HW_VLAN_CTAG_TX) {
>> return __vlan_hwaccel_get_tag(skb, vlan_tci);
>> } else {
>> return __vlan_get_tag(skb, vlan_tci);
>> diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
>> index 2c6b9e4..9184963 100644
>> --- a/include/linux/netdev_features.h
>> +++ b/include/linux/netdev_features.h
>> @@ -102,7 +102,8 @@ enum {
>> };
>>
>> /* copy'n'paste compression ;) */
>> -#define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit))
>> +#define __NETIF_F_BIT(bit) ((netdev_features_t)1 << (bit & 0x3F))
>> +
>> #define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)
>>
>> #define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
>> @@ -169,6 +170,8 @@ enum {
>> #define NETIF_F_HW_HSR_FWD __NETIF_F(HW_HSR_FWD)
>> #define NETIF_F_HW_HSR_DUP __NETIF_F(HW_HSR_DUP)
>>
>> +#define NETDEV_FEATURE_DWORDS DIV_ROUND_UP(NETDEV_FEATURE_COUNT, 64)
>> +
>> /* Finds the next feature with the highest number of the range of start till 0.
>> */
>> static inline int find_next_netdev_feature(u64 feature, unsigned long start)
>> @@ -185,8 +188,7 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
>> * mask_addr should be a u64 and bit an int
>> */
>> #define for_each_netdev_feature(mask_addr, bit) \
>> - for ((bit) = find_next_netdev_feature((mask_addr), \
>> - NETDEV_FEATURE_COUNT); \
>> + for ((bit) = find_next_netdev_feature((mask_addr), 64); \
>> (bit) >= 0; \
>> (bit) = find_next_netdev_feature((mask_addr), (bit) - 1))
>>
>> @@ -195,11 +197,6 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
>> #define NETIF_F_NEVER_CHANGE (NETIF_F_VLAN_CHALLENGED | \
>> NETIF_F_LLTX | NETIF_F_NETNS_LOCAL)
>>
>> -/* remember that ((t)1 << t_BITS) is undefined in C99 */
>> -#define NETIF_F_ETHTOOL_BITS ((__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) | \
>> - (__NETIF_F_BIT(NETDEV_FEATURE_COUNT - 1) - 1)) & \
>> - ~NETIF_F_NEVER_CHANGE)
>> -
>> /* Segmentation offload feature mask */
>> #define NETIF_F_GSO_MASK (__NETIF_F_BIT(NETIF_F_GSO_LAST + 1) - \
>> __NETIF_F_BIT(NETIF_F_GSO_SHIFT))
>> @@ -261,4 +258,96 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
>> NETIF_F_GSO_UDP_TUNNEL | \
>> NETIF_F_GSO_UDP_TUNNEL_CSUM)
>>
>> +static inline void netdev_features_copy(netdev_features_t *dst,
>> + const netdev_features_t *src)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + dst[i] = src[i];
>> +}
>> +
>> +static inline void netdev_features_and(netdev_features_t *dst,
>> + const netdev_features_t *a,
>> + const netdev_features_t *b)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + dst[i] = a[i] & b[i];
>> +}
>> +
>> +static inline void netdev_features_andnot(netdev_features_t *dst,
>> + const netdev_features_t *a,
>> + const netdev_features_t *b)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + dst[i] = a[i] & ~b[i];
>> +}
>> +
>> +static inline void netdev_features_or(netdev_features_t *dst,
>> + const netdev_features_t *a,
>> + const netdev_features_t *b)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + dst[i] = a[i] | b[i];
>> +}
>> +
>> +static inline void netdev_features_xor(netdev_features_t *dst,
>> + const netdev_features_t *a,
>> + const netdev_features_t *b)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + dst[i] = a[i] ^ b[i];
>> +}
>> +
>> +static inline void netdev_features_set(netdev_features_t *dst,
>> + unsigned int bit)
>> +{
>> + dst[bit / 64] |= __NETIF_F_BIT(bit);
>> +}
>> +
>> +static inline bool netdev_features_equal(const netdev_features_t *a,
>> + const netdev_features_t *b)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + if (a[i] != b[i])
>> + return false;
>> +
>> + return true;
>> +}
>> +
>> +static inline void netdev_features_empty(netdev_features_t *src)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + if (src[i])
>> + return false;
>> +
>> + return true;
>> +}
>> +
>> +static inline void netdev_features_ethtool_bits(netdev_features_t *dst)
>> +{
>> + unsigned int i;
>> +
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++) {
>> + if (NETDEV_FEATURE_COUNT >= (i + 1) * 64)
>> + dst[i] = GENMASK_ULL(63, 0);
>> + else
>> + dst[i] = GENMASK_ULL(NETDEV_FEATURE_COUNT - i * 64,
>> + 0);
>> + }
>> + dst[0] &= ~NETIF_F_NEVER_CHANGE;
>> +}
>> +
>> #endif /* _LINUX_NETDEV_FEATURES_H */
>> diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
>> index eaf5bb0..4a29487 100644
>> --- a/include/linux/netdevice.h
>> +++ b/include/linux/netdevice.h
>> @@ -1347,9 +1347,9 @@ struct net_device_ops {
>> int (*ndo_stop)(struct net_device *dev);
>> netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb,
>> struct net_device *dev);
>> - netdev_features_t (*ndo_features_check)(struct sk_buff *skb,
>> + void (*ndo_features_check)(struct sk_buff *skb,
>> struct net_device *dev,
>> - netdev_features_t features);
>> + netdev_features_t *features);
>> u16 (*ndo_select_queue)(struct net_device *dev,
>> struct sk_buff *skb,
>> struct net_device *sb_dev);
>> @@ -1467,10 +1467,10 @@ struct net_device_ops {
>> bool all_slaves);
>> struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev,
>> struct sock *sk);
>> - netdev_features_t (*ndo_fix_features)(struct net_device *dev,
>> - netdev_features_t features);
>> + void (*ndo_fix_features)(struct net_device *dev,
>> + netdev_features_t *features);
>> int (*ndo_set_features)(struct net_device *dev,
>> - netdev_features_t features);
>> + netdev_features_t *features);
>> int (*ndo_neigh_construct)(struct net_device *dev,
>> struct neighbour *n);
>> void (*ndo_neigh_destroy)(struct net_device *dev,
>> @@ -1978,12 +1978,12 @@ struct net_device {
>> unsigned short needed_headroom;
>> unsigned short needed_tailroom;
>>
>> - netdev_features_t features;
>> - netdev_features_t hw_features;
>> - netdev_features_t wanted_features;
>> - netdev_features_t vlan_features;
>> - netdev_features_t hw_enc_features;
>> - netdev_features_t mpls_features;
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t hw_features[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t wanted_features[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t vlan_features[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t hw_enc_features[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t mpls_features[NETDEV_FEATURE_DWORDS];
>> netdev_features_t gso_partial_features;
>>
>> unsigned int min_mtu;
>> @@ -4986,10 +4986,11 @@ static inline netdev_features_t netdev_intersect_features(netdev_features_t f1,
>> return f1 & f2;
>> }
>>
>> -static inline netdev_features_t netdev_get_wanted_features(
>> - struct net_device *dev)
>> +static inline void netdev_get_wanted_features(struct net_device *dev,
>> + netdev_features_t *wanted)
>> {
>> - return (dev->features & ~dev->hw_features) | dev->wanted_features;
>> + netdev_features_andnot(wanted, dev->features, dev->hw_features);
>> + netdev_features_or(wanted, wanted, dev->wanted_features);
>> }
>> netdev_features_t netdev_increment_features(netdev_features_t all,
>> netdev_features_t one, netdev_features_t mask);
>> @@ -5014,7 +5015,7 @@ void netif_stacked_transfer_operstate(const struct net_device *rootdev,
>> netdev_features_t passthru_features_check(struct sk_buff *skb,
>> struct net_device *dev,
>> netdev_features_t features);
>> -netdev_features_t netif_skb_features(struct sk_buff *skb);
>> +void netif_skb_features(struct sk_buff *skb, netdev_features_t *features);
>>
>> static inline bool net_gso_ok(netdev_features_t features, int gso_type)
>> {
>> diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
>> index 4cdf841..7d77692 100644
>> --- a/net/8021q/vlan.c
>> +++ b/net/8021q/vlan.c
>> @@ -328,7 +328,7 @@ static void vlan_transfer_features(struct net_device *dev,
>> vlandev->gso_max_size = dev->gso_max_size;
>> vlandev->gso_max_segs = dev->gso_max_segs;
>>
>> - if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
>> + if (vlan_hw_offload_capable(dev->features[0], vlan->vlan_proto))
>> vlandev->hard_header_len = dev->hard_header_len;
>> else
>> vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
>> @@ -339,7 +339,7 @@ static void vlan_transfer_features(struct net_device *dev,
>>
>> vlandev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
>> vlandev->priv_flags |= (vlan->real_dev->priv_flags & IFF_XMIT_DST_RELEASE);
>> - vlandev->hw_enc_features = vlan_tnl_features(vlan->real_dev);
>> + vlandev->hw_enc_features[0] = vlan_tnl_features(vlan->real_dev);
>>
>> netdev_update_features(vlandev);
>> }
>> diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
>> index 1a705a4..4e784a1 100644
>> --- a/net/8021q/vlan.h
>> +++ b/net/8021q/vlan.h
>> @@ -107,7 +107,7 @@ static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev)
>> {
>> netdev_features_t ret;
>>
>> - ret = real_dev->hw_enc_features &
>> + ret = real_dev->hw_enc_features[0] &
>> (NETIF_F_CSUM_MASK | NETIF_F_GSO_SOFTWARE |
>> NETIF_F_GSO_ENCAP_ALL);
>>
>> diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
>> index a0367b3..6d49761 100644
>> --- a/net/8021q/vlan_dev.c
>> +++ b/net/8021q/vlan_dev.c
>> @@ -566,21 +566,21 @@ static int vlan_dev_init(struct net_device *dev)
>> if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING)
>> dev->state |= (1 << __LINK_STATE_NOCARRIER);
>>
>> - dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG |
>> - NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
>> - NETIF_F_GSO_ENCAP_ALL |
>> - NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
>> - NETIF_F_ALL_FCOE;
>> + dev->hw_features[0] = NETIF_F_HW_CSUM | NETIF_F_SG |
>> + NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE |
>> + NETIF_F_GSO_ENCAP_ALL |
>> + NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC |
>> + NETIF_F_ALL_FCOE;
>>
>> - dev->features |= dev->hw_features | NETIF_F_LLTX;
>> + dev->features[0] |= dev->hw_features[0] | NETIF_F_LLTX;
>> dev->gso_max_size = real_dev->gso_max_size;
>> dev->gso_max_segs = real_dev->gso_max_segs;
>> - if (dev->features & NETIF_F_VLAN_FEATURES)
>> + if (dev->features[0] & NETIF_F_VLAN_FEATURES)
>> netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
>>
>> - dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE;
>> - dev->hw_enc_features = vlan_tnl_features(real_dev);
>> - dev->mpls_features = real_dev->mpls_features;
>> + dev->vlan_features[0] = real_dev->vlan_features[0] & ~NETIF_F_ALL_FCOE;
>> + dev->hw_enc_features[0] = vlan_tnl_features(real_dev);
>> + netdev_features_copy(dev->mpls_features, real_dev->mpls_features);
>>
>> /* ipv6 shared card related stuff */
>> dev->dev_id = real_dev->dev_id;
>> @@ -633,27 +633,30 @@ void vlan_dev_uninit(struct net_device *dev)
>> }
>> }
>>
>> -static netdev_features_t vlan_dev_fix_features(struct net_device *dev,
>> - netdev_features_t features)
>> +static void vlan_dev_fix_features(struct net_device *dev,
>> + netdev_features_t *features)
>> {
>> struct net_device *real_dev = vlan_dev_priv(dev)->real_dev;
>> - netdev_features_t old_features = features;
>> - netdev_features_t lower_features;
>> + netdev_features_t lower_features[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t old_features[NETDEV_FEATURE_DWORDS];
>>
>> - lower_features = netdev_intersect_features((real_dev->vlan_features |
>> - NETIF_F_RXCSUM),
>> - real_dev->features);
>> + netdev_features_copy(lower_features, features);
>> +
>> + lower_features[0] =
>> + netdev_intersect_features((real_dev->vlan_features[0] |
>> + NETIF_F_RXCSUM),
>> + real_dev->features[0]);
>>
>> /* Add HW_CSUM setting to preserve user ability to control
>> * checksum offload on the vlan device.
>> */
>> - if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
>> - lower_features |= NETIF_F_HW_CSUM;
>> - features = netdev_intersect_features(features, lower_features);
>> - features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
>> - features |= NETIF_F_LLTX;
>> + if (lower_features[0] & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
>> + lower_features[0] |= NETIF_F_HW_CSUM;
>>
>> - return features;
>> + features[0] = netdev_intersect_features(features[0], lower_features[0]);
>> + features[0] |= old_features[0] &
>> + (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE);
>> + features[0] |= NETIF_F_LLTX;
>> }
>>
>> static int vlan_ethtool_get_link_ksettings(struct net_device *dev,
>> diff --git a/net/core/dev.c b/net/core/dev.c
>> index c253c2a..7066bf3 100644
>> --- a/net/core/dev.c
>> +++ b/net/core/dev.c
>> @@ -1765,7 +1765,7 @@ void dev_disable_lro(struct net_device *dev)
>> dev->wanted_features &= ~NETIF_F_LRO;
>> netdev_update_features(dev);
>>
>> - if (unlikely(dev->features & NETIF_F_LRO))
>> + if (unlikely(dev->features[0] & NETIF_F_LRO))
>> netdev_WARN(dev, "failed to disable LRO!\n");
>>
>> netdev_for_each_lower_dev(dev, lower_dev, iter)
>> @@ -1786,7 +1786,7 @@ static void dev_disable_gro_hw(struct net_device *dev)
>> dev->wanted_features &= ~NETIF_F_GRO_HW;
>> netdev_update_features(dev);
>>
>> - if (unlikely(dev->features & NETIF_F_GRO_HW))
>> + if (unlikely(dev->features[0] & NETIF_F_GRO_HW))
>> netdev_WARN(dev, "failed to disable GRO_HW!\n");
>> }
>>
>> @@ -3276,7 +3276,7 @@ static void skb_warn_bad_offload(const struct sk_buff *skb)
>> }
>> skb_dump(KERN_WARNING, skb, false);
>> WARN(1, "%s: caps=(%pNF, %pNF)\n",
>> - name, dev ? &dev->features : &null_features,
>> + name, dev ? &dev->features[0] : &null_features,
>> skb->sk ? &skb->sk->sk_route_caps : &null_features);
>> }
>>
>> @@ -3463,7 +3463,8 @@ struct sk_buff *__skb_gso_segment(struct sk_buff *skb,
>> netdev_features_t partial_features = NETIF_F_GSO_ROBUST;
>> struct net_device *dev = skb->dev;
>>
>> - partial_features |= dev->features & dev->gso_partial_features;
>> + partial_features |=
>> + dev->features[0] & dev->gso_partial_features;
>> if (!skb_gso_ok(skb, features | partial_features))
>> features &= ~NETIF_F_GSO_PARTIAL;
>> }
>> @@ -3508,7 +3509,7 @@ static int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
>> #ifdef CONFIG_HIGHMEM
>> int i;
>>
>> - if (!(dev->features & NETIF_F_HIGHDMA)) {
>> + if (!(dev->features[0] & NETIF_F_HIGHDMA)) {
>> for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
>> skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
>>
>> @@ -3612,34 +3613,33 @@ static netdev_features_t gso_features_check(const struct sk_buff *skb,
>> return features;
>> }
>>
>> -netdev_features_t netif_skb_features(struct sk_buff *skb)
>> +void netif_skb_features(struct sk_buff *skb, netdev_features_t *features)
>> {
>> struct net_device *dev = skb->dev;
>> - netdev_features_t features = dev->features;
>>
>> + netdev_features_copy(features, dev->features);
>> if (skb_is_gso(skb))
>> - features = gso_features_check(skb, dev, features);
>> + features[0] = gso_features_check(skb, dev, features[0]);
>>
>> /* If encapsulation offload request, verify we are testing
>> * hardware encapsulation features instead of standard
>> * features for the netdev
>> */
>> if (skb->encapsulation)
>> - features &= dev->hw_enc_features;
>> + netdev_features_and(features, dev->hw_enc_features);
>>
>> if (skb_vlan_tagged(skb))
>> - features = netdev_intersect_features(features,
>> - dev->vlan_features |
>> - NETIF_F_HW_VLAN_CTAG_TX |
>> - NETIF_F_HW_VLAN_STAG_TX);
>> + features[0] = netdev_intersect_features(features[0],
>> + dev->vlan_features[0] |
>> + NETIF_F_HW_VLAN_CTAG_TX |
>> + NETIF_F_HW_VLAN_STAG_TX);
>>
>> if (dev->netdev_ops->ndo_features_check)
>> - features &= dev->netdev_ops->ndo_features_check(skb, dev,
>> - features);
>> + dev->netdev_ops->ndo_features_check(skb, dev, features);
>> else
>> - features &= dflt_features_check(skb, dev, features);
>> + features[0] &= dflt_features_check(skb, dev, features[0]);
>>
>> - return harmonize_features(skb, features);
>> + features[0] = harmonize_features(skb, features[0]);
>> }
>> EXPORT_SYMBOL(netif_skb_features);
>>
>> @@ -3722,10 +3722,10 @@ EXPORT_SYMBOL(skb_csum_hwoffload_help);
>>
>> static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device *dev, bool *again)
>> {
>> - netdev_features_t features;
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS];
>>
>> - features = netif_skb_features(skb);
>> - skb = validate_xmit_vlan(skb, features);
>> + netif_skb_features(skb, features);
>> + skb = validate_xmit_vlan(skb, features[0]);
>> if (unlikely(!skb))
>> goto out_null;
>>
>> @@ -3733,10 +3733,10 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device
>> if (unlikely(!skb))
>> goto out_null;
>>
>> - if (netif_needs_gso(skb, features)) {
>> + if (netif_needs_gso(skb, features[0])) {
>> struct sk_buff *segs;
>>
>> - segs = skb_gso_segment(skb, features);
>> + segs = skb_gso_segment(skb, features[0]);
>> if (IS_ERR(segs)) {
>> goto out_kfree_skb;
>> } else if (segs) {
>> @@ -3744,7 +3744,7 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device
>> skb = segs;
>> }
>> } else {
>> - if (skb_needs_linearize(skb, features) &&
>> + if (skb_needs_linearize(skb, features[0]) &&
>> __skb_linearize(skb))
>> goto out_kfree_skb;
>>
>> @@ -3759,12 +3759,12 @@ static struct sk_buff *validate_xmit_skb(struct sk_buff *skb, struct net_device
>> else
>> skb_set_transport_header(skb,
>> skb_checksum_start_offset(skb));
>> - if (skb_csum_hwoffload_help(skb, features))
>> + if (skb_csum_hwoffload_help(skb, features[0]))
>> goto out_kfree_skb;
>> }
>> }
>>
>> - skb = validate_xmit_xfrm(skb, features, again);
>> + skb = validate_xmit_xfrm(skb, features[0], again);
>>
>> return skb;
>>
>> @@ -4429,7 +4429,7 @@ set_rps_cpu(struct net_device *dev, struct sk_buff *skb,
>>
>> /* Should we steer this flow to a different hardware queue? */
>> if (!skb_rx_queue_recorded(skb) || !dev->rx_cpu_rmap ||
>> - !(dev->features & NETIF_F_NTUPLE))
>> + !(dev->features[0] & NETIF_F_NTUPLE))
>> goto out;
>> rxq_index = cpu_rmap_lookup_index(dev->rx_cpu_rmap, next_cpu);
>> if (rxq_index == skb_get_rx_queue(skb))
>> @@ -9799,171 +9799,179 @@ static void net_set_todo(struct net_device *dev)
>> dev_net(dev)->dev_unreg_count++;
>> }
>>
>> -static netdev_features_t netdev_sync_upper_features(struct net_device *lower,
>> - struct net_device *upper, netdev_features_t features)
>> +static void netdev_sync_upper_features(struct net_device *lower,
>> + struct net_device *upper,
>> + netdev_features_t *features)
>> {
>> netdev_features_t upper_disables = NETIF_F_UPPER_DISABLES;
>> netdev_features_t feature;
>> int feature_bit;
>> + unsigned int i;
>>
>> - for_each_netdev_feature(upper_disables, feature_bit) {
>> - feature = __NETIF_F_BIT(feature_bit);
>> - if (!(upper->wanted_features & feature)
>> - && (features & feature)) {
>> - netdev_dbg(lower, "Dropping feature %pNF, upper dev %s has it off.\n",
>> - &feature, upper->name);
>> - features &= ~feature;
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++) {
>> + for_each_netdev_feature(upper_disables, feature_bit) {
>> + feature = __NETIF_F_BIT(feature_bit);
>> + if (!(upper->wanted_features[i] & feature) &&
>> + (features[i] & feature)) {
>> + netdev_dbg(lower, "Dropping feature[%u] %pNF, upper dev %s has it off.\n",
>> + i, &feature, upper->name);
>> + features[i] &= ~feature;
>> + }
>> }
>> }
>> -
>> - return features;
>> }
>>
>> static void netdev_sync_lower_features(struct net_device *upper,
>> - struct net_device *lower, netdev_features_t features)
>> + struct net_device *lower, netdev_features_t *features)
>> {
>> netdev_features_t upper_disables = NETIF_F_UPPER_DISABLES;
>> netdev_features_t feature;
>> int feature_bit;
>> + unsigned int i;
>>
>> - for_each_netdev_feature(upper_disables, feature_bit) {
>> - feature = __NETIF_F_BIT(feature_bit);
>> - if (!(features & feature) && (lower->features & feature)) {
>> - netdev_dbg(upper, "Disabling feature %pNF on lower dev %s.\n",
>> - &feature, lower->name);
>> - lower->wanted_features &= ~feature;
>> - __netdev_update_features(lower);
>> -
>> - if (unlikely(lower->features & feature))
>> - netdev_WARN(upper, "failed to disable %pNF on %s!\n",
>> - &feature, lower->name);
>> - else
>> - netdev_features_change(lower);
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++) {
>> + for_each_netdev_feature(upper_disables, feature_bit) {
>> + feature = __NETIF_F_BIT(feature_bit);
>> + if (!(features[i] & feature) &&
>> + (lower->features[i] & feature)) {
>> + netdev_dbg(upper, "Disabling feature[%u] %pNF on lower dev %s.\n",
>> + i, &feature, lower->name);
>> + lower->wanted_features[i] &= ~feature[i];
>> + __netdev_update_features(lower);
>> +
>> + if (unlikely(lower->features[i] & feature))
>> + netdev_WARN(upper, "failed to disable feature[%u] %pNF on %s!\n",
>> + i, &feature, lower->name);
>> + else
>> + netdev_features_change(lower);
>> + }
>> }
>> }
>> }
>>
>> -static netdev_features_t netdev_fix_features(struct net_device *dev,
>> - netdev_features_t features)
>> +static void netdev_fix_features(struct net_device *dev,
>> + netdev_features_t *features)
>> {
>> /* Fix illegal checksum combinations */
>> - if ((features & NETIF_F_HW_CSUM) &&
>> - (features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
>> + if ((features[0] & NETIF_F_HW_CSUM) &&
>> + (features[0] & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) {
>> netdev_warn(dev, "mixed HW and IP checksum settings.\n");
>> - features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
>> + features[0] &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
>> }
>>
>> /* TSO requires that SG is present as well. */
>> - if ((features & NETIF_F_ALL_TSO) && !(features & NETIF_F_SG)) {
>> + if ((features[0] & NETIF_F_ALL_TSO) && !(features[0] & NETIF_F_SG)) {
>> netdev_dbg(dev, "Dropping TSO features since no SG feature.\n");
>> - features &= ~NETIF_F_ALL_TSO;
>> + features[0] &= ~NETIF_F_ALL_TSO;
>> }
>>
>> - if ((features & NETIF_F_TSO) && !(features & NETIF_F_HW_CSUM) &&
>> - !(features & NETIF_F_IP_CSUM)) {
>> + if ((features[0] & NETIF_F_TSO) && !(features[0] & NETIF_F_HW_CSUM) &&
>> + !(features[0] & NETIF_F_IP_CSUM)) {
>> netdev_dbg(dev, "Dropping TSO features since no CSUM feature.\n");
>> - features &= ~NETIF_F_TSO;
>> - features &= ~NETIF_F_TSO_ECN;
>> + features[0] &= ~NETIF_F_TSO;
>> + features[0] &= ~NETIF_F_TSO_ECN;
>> }
>>
>> - if ((features & NETIF_F_TSO6) && !(features & NETIF_F_HW_CSUM) &&
>> - !(features & NETIF_F_IPV6_CSUM)) {
>> + if ((features[0] & NETIF_F_TSO6) && !(features[0] & NETIF_F_HW_CSUM) &&
>> + !(features[0] & NETIF_F_IPV6_CSUM)) {
>> netdev_dbg(dev, "Dropping TSO6 features since no CSUM feature.\n");
>> - features &= ~NETIF_F_TSO6;
>> + features[0] &= ~NETIF_F_TSO6;
>> }
>>
>> /* TSO with IPv4 ID mangling requires IPv4 TSO be enabled */
>> - if ((features & NETIF_F_TSO_MANGLEID) && !(features & NETIF_F_TSO))
>> - features &= ~NETIF_F_TSO_MANGLEID;
>> + if ((features[0] & NETIF_F_TSO_MANGLEID) &&
>> + !(features[0] & NETIF_F_TSO))
>> + features[0] &= ~NETIF_F_TSO_MANGLEID;
>>
>> /* TSO ECN requires that TSO is present as well. */
>> - if ((features & NETIF_F_ALL_TSO) == NETIF_F_TSO_ECN)
>> - features &= ~NETIF_F_TSO_ECN;
>> + if ((features[0] & NETIF_F_ALL_TSO) == NETIF_F_TSO_ECN)
>> + features[0] &= ~NETIF_F_TSO_ECN;
>>
>> /* Software GSO depends on SG. */
>> - if ((features & NETIF_F_GSO) && !(features & NETIF_F_SG)) {
>> + if ((features[0] & NETIF_F_GSO) && !(features[0] & NETIF_F_SG)) {
>> netdev_dbg(dev, "Dropping NETIF_F_GSO since no SG feature.\n");
>> - features &= ~NETIF_F_GSO;
>> + features[0] &= ~NETIF_F_GSO;
>> }
>>
>> /* GSO partial features require GSO partial be set */
>> - if ((features & dev->gso_partial_features) &&
>> - !(features & NETIF_F_GSO_PARTIAL)) {
>> + if ((features[0] & dev->gso_partial_features) &&
>> + !(features[0] & NETIF_F_GSO_PARTIAL)) {
>> netdev_dbg(dev,
>> "Dropping partially supported GSO features since no GSO partial.\n");
>> - features &= ~dev->gso_partial_features;
>> + features[0] &= ~dev->gso_partial_features;
>> }
>>
>> - if (!(features & NETIF_F_RXCSUM)) {
>> + if (!(features[0] & NETIF_F_RXCSUM)) {
>> /* NETIF_F_GRO_HW implies doing RXCSUM since every packet
>> * successfully merged by hardware must also have the
>> * checksum verified by hardware. If the user does not
>> * want to enable RXCSUM, logically, we should disable GRO_HW.
>> */
>> - if (features & NETIF_F_GRO_HW) {
>> + if (features[0] & NETIF_F_GRO_HW) {
>> netdev_dbg(dev, "Dropping NETIF_F_GRO_HW since no RXCSUM feature.\n");
>> - features &= ~NETIF_F_GRO_HW;
>> + features[0] &= ~NETIF_F_GRO_HW;
>> }
>> }
>>
>> /* LRO/HW-GRO features cannot be combined with RX-FCS */
>> - if (features & NETIF_F_RXFCS) {
>> - if (features & NETIF_F_LRO) {
>> + if (features[0] & NETIF_F_RXFCS) {
>> + if (features[0] & NETIF_F_LRO) {
>> netdev_dbg(dev, "Dropping LRO feature since RX-FCS is requested.\n");
>> - features &= ~NETIF_F_LRO;
>> + features[0] &= ~NETIF_F_LRO;
>> }
>>
>> - if (features & NETIF_F_GRO_HW) {
>> + if (features[0] & NETIF_F_GRO_HW) {
>> netdev_dbg(dev, "Dropping HW-GRO feature since RX-FCS is requested.\n");
>> - features &= ~NETIF_F_GRO_HW;
>> + features[0] &= ~NETIF_F_GRO_HW;
>> }
>> }
>>
>> - if (features & NETIF_F_HW_TLS_TX) {
>> - bool ip_csum = (features & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) ==
>> + if (features[0] & NETIF_F_HW_TLS_TX) {
>> + bool ip_csum = (features[0] & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)) ==
>> (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
>> - bool hw_csum = features & NETIF_F_HW_CSUM;
>> + bool hw_csum = features[0] & NETIF_F_HW_CSUM;
>>
>> if (!ip_csum && !hw_csum) {
>> netdev_dbg(dev, "Dropping TLS TX HW offload feature since no CSUM feature.\n");
>> - features &= ~NETIF_F_HW_TLS_TX;
>> + features[0] &= ~NETIF_F_HW_TLS_TX;
>> }
>> }
>>
>> - if ((features & NETIF_F_HW_TLS_RX) && !(features & NETIF_F_RXCSUM)) {
>> + if ((features[0] & NETIF_F_HW_TLS_RX) &&
>> + !(features[0] & NETIF_F_RXCSUM)) {
>> netdev_dbg(dev, "Dropping TLS RX HW offload feature since no RXCSUM feature.\n");
>> - features &= ~NETIF_F_HW_TLS_RX;
>> + features[0] &= ~NETIF_F_HW_TLS_RX;
>> }
>> -
>> - return features;
>> }
>>
>> int __netdev_update_features(struct net_device *dev)
>> {
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS];
>> struct net_device *upper, *lower;
>> - netdev_features_t features;
>> struct list_head *iter;
>> + unsigned int i;
>> int err = -1;
>>
>> ASSERT_RTNL();
>>
>> - features = netdev_get_wanted_features(dev);
>> + netdev_get_wanted_features(dev, features);
>>
>> if (dev->netdev_ops->ndo_fix_features)
>> - features = dev->netdev_ops->ndo_fix_features(dev, features);
>> + dev->netdev_ops->ndo_fix_features(dev, features);
>>
>> /* driver might be less strict about feature dependencies */
>> - features = netdev_fix_features(dev, features);
>> + netdev_fix_features(dev, features);
>>
>> /* some features can't be enabled if they're off on an upper device */
>> netdev_for_each_upper_dev_rcu(dev, upper, iter)
>> - features = netdev_sync_upper_features(dev, upper, features);
>> + netdev_sync_upper_features(dev, upper, features);
>>
>> - if (dev->features == features)
>> + if (netdev_features_equal(dev->features, features))
>> goto sync_lower;
>>
>> - netdev_dbg(dev, "Features changed: %pNF -> %pNF\n",
>> - &dev->features, &features);
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + netdev_dbg(dev, "Features[%u] changed: %pNF -> %pNF\n",
>> + i, &dev->features[i], &features[i]);
>>
>> if (dev->netdev_ops->ndo_set_features)
>> err = dev->netdev_ops->ndo_set_features(dev, features);
>> @@ -9971,9 +9979,10 @@ int __netdev_update_features(struct net_device *dev)
>> err = 0;
>>
>> if (unlikely(err < 0)) {
>> - netdev_err(dev,
>> - "set_features() failed (%d); wanted %pNF, left %pNF\n",
>> - err, &features, &dev->features);
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + netdev_err(dev,
>> + "set_features() failed (%d); wanted[%u] %pNF, left[%u] %pNF\n",
>> + err, i, &features[i], i, &dev->features[i]);
>> /* return non-0 since some features might have changed and
>> * it's better to fire a spurious notification than miss it
>> */
>> @@ -9988,9 +9997,10 @@ int __netdev_update_features(struct net_device *dev)
>> netdev_sync_lower_features(dev, lower, features);
>>
>> if (!err) {
>> - netdev_features_t diff = features ^ dev->features;
>> + netdev_features_t diff[NETDEV_FEATURE_DWORDS];
>>
>> - if (diff & NETIF_F_RX_UDP_TUNNEL_PORT) {
>> + netdev_features_xor(diff, features, dev->features);
>> + if (diff[0] & NETIF_F_RX_UDP_TUNNEL_PORT) {
>> /* udp_tunnel_{get,drop}_rx_info both need
>> * NETIF_F_RX_UDP_TUNNEL_PORT enabled on the
>> * device, or they won't do anything.
>> @@ -9998,33 +10008,33 @@ int __netdev_update_features(struct net_device *dev)
>> * *before* calling udp_tunnel_get_rx_info,
>> * but *after* calling udp_tunnel_drop_rx_info.
>> */
>> - if (features & NETIF_F_RX_UDP_TUNNEL_PORT) {
>> - dev->features = features;
>> + if (features[0] & NETIF_F_RX_UDP_TUNNEL_PORT) {
>> + dev->features[0] = features[0];
>> udp_tunnel_get_rx_info(dev);
>> } else {
>> udp_tunnel_drop_rx_info(dev);
>> }
>> }
>>
>> - if (diff & NETIF_F_HW_VLAN_CTAG_FILTER) {
>> - if (features & NETIF_F_HW_VLAN_CTAG_FILTER) {
>> - dev->features = features;
>> + if (diff[0] & NETIF_F_HW_VLAN_CTAG_FILTER) {
>> + if (features[0] & NETIF_F_HW_VLAN_CTAG_FILTER) {
>> + dev->features[0] = features[0];
>> err |= vlan_get_rx_ctag_filter_info(dev);
>> } else {
>> vlan_drop_rx_ctag_filter_info(dev);
>> }
>> }
>>
>> - if (diff & NETIF_F_HW_VLAN_STAG_FILTER) {
>> + if (diff[0] & NETIF_F_HW_VLAN_STAG_FILTER) {
>> if (features & NETIF_F_HW_VLAN_STAG_FILTER) {
>> - dev->features = features;
>> + dev->features[0] = features[0];
>> err |= vlan_get_rx_stag_filter_info(dev);
>> } else {
>> vlan_drop_rx_stag_filter_info(dev);
>> }
>> }
>>
>> - dev->features = features;
>> + netdev_features_copy(dev->features, features);
>> }
>>
>> return err < 0 ? 0 : 1;
>> @@ -10213,7 +10223,7 @@ int register_netdevice(struct net_device *dev)
>> int ret;
>> struct net *net = dev_net(dev);
>>
>> - BUILD_BUG_ON(sizeof(netdev_features_t) * BITS_PER_BYTE <
>> + BUILD_BUG_ON(sizeof(dev->features) * BITS_PER_BYTE <
>> NETDEV_FEATURE_COUNT);
>> BUG_ON(dev_boot_phase);
>> ASSERT_RTNL();
>> @@ -10250,7 +10260,7 @@ int register_netdevice(struct net_device *dev)
>> }
>> }
>>
>> - if (((dev->hw_features | dev->features) &
>> + if (((dev->hw_features[0] | dev->features[0]) &
>> NETIF_F_HW_VLAN_CTAG_FILTER) &&
>> (!dev->netdev_ops->ndo_vlan_rx_add_vid ||
>> !dev->netdev_ops->ndo_vlan_rx_kill_vid)) {
>> @@ -10268,44 +10278,46 @@ int register_netdevice(struct net_device *dev)
>> /* Transfer changeable features to wanted_features and enable
>> * software offloads (GSO and GRO).
>> */
>> - dev->hw_features |= (NETIF_F_SOFT_FEATURES | NETIF_F_SOFT_FEATURES_OFF);
>> - dev->features |= NETIF_F_SOFT_FEATURES;
>> + dev->hw_features[0] |=
>> + (NETIF_F_SOFT_FEATURES | NETIF_F_SOFT_FEATURES_OFF);
>> + dev->features[0] |= NETIF_F_SOFT_FEATURES;
>>
>> if (dev->udp_tunnel_nic_info) {
>> - dev->features |= NETIF_F_RX_UDP_TUNNEL_PORT;
>> - dev->hw_features |= NETIF_F_RX_UDP_TUNNEL_PORT;
>> + dev->features[0] |= NETIF_F_RX_UDP_TUNNEL_PORT;
>> + dev->hw_features[0] |= NETIF_F_RX_UDP_TUNNEL_PORT;
>> }
>>
>> - dev->wanted_features = dev->features & dev->hw_features;
>> + netdev_features_and(dev->wanted_features, dev->features,
>> + dev->hw_features);
>>
>> if (!(dev->flags & IFF_LOOPBACK))
>> - dev->hw_features |= NETIF_F_NOCACHE_COPY;
>> + dev->hw_features[0] |= NETIF_F_NOCACHE_COPY;
>>
>> /* If IPv4 TCP segmentation offload is supported we should also
>> * allow the device to enable segmenting the frame with the option
>> * of ignoring a static IP ID value. This doesn't enable the
>> * feature itself but allows the user to enable it later.
>> */
>> - if (dev->hw_features & NETIF_F_TSO)
>> - dev->hw_features |= NETIF_F_TSO_MANGLEID;
>> - if (dev->vlan_features & NETIF_F_TSO)
>> - dev->vlan_features |= NETIF_F_TSO_MANGLEID;
>> - if (dev->mpls_features & NETIF_F_TSO)
>> - dev->mpls_features |= NETIF_F_TSO_MANGLEID;
>> - if (dev->hw_enc_features & NETIF_F_TSO)
>> - dev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
>> + if (dev->hw_features[0] & NETIF_F_TSO)
>> + dev->hw_features[0] |= NETIF_F_TSO_MANGLEID;
>> + if (dev->vlan_features[0] & NETIF_F_TSO)
>> + dev->vlan_features[0] |= NETIF_F_TSO_MANGLEID;
>> + if (dev->mpls_features[0] & NETIF_F_TSO)
>> + dev->mpls_features[0] |= NETIF_F_TSO_MANGLEID;
>> + if (dev->hw_enc_features[0] & NETIF_F_TSO)
>> + dev->hw_enc_features[0] |= NETIF_F_TSO_MANGLEID;
>>
>> /* Make NETIF_F_HIGHDMA inheritable to VLAN devices.
>> */
>> - dev->vlan_features |= NETIF_F_HIGHDMA;
>> + dev->vlan_features[0] |= NETIF_F_HIGHDMA;
>>
>> /* Make NETIF_F_SG inheritable to tunnel devices.
>> */
>> - dev->hw_enc_features |= NETIF_F_SG | NETIF_F_GSO_PARTIAL;
>> + dev->hw_enc_features[0] |= NETIF_F_SG | NETIF_F_GSO_PARTIAL;
>>
>> /* Make NETIF_F_SG inheritable to MPLS.
>> */
>> - dev->mpls_features |= NETIF_F_SG;
>> + dev->mpls_features[0] |= NETIF_F_SG;
>>
>> ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev);
>> ret = notifier_to_errno(ret);
>> @@ -11146,7 +11158,7 @@ int __dev_change_net_namespace(struct net_device *dev, struct net *net,
>>
>> /* Don't allow namespace local devices to be moved. */
>> err = -EINVAL;
>> - if (dev->features & NETIF_F_NETNS_LOCAL)
>> + if (dev->features[0] & NETIF_F_NETNS_LOCAL)
>> goto out;
>>
>> /* Ensure the device has been registrered */
>> @@ -11506,7 +11518,7 @@ static void __net_exit default_device_exit(struct net *net)
>> char fb_name[IFNAMSIZ];
>>
>> /* Ignore unmoveable devices (i.e. loopback) */
>> - if (dev->features & NETIF_F_NETNS_LOCAL)
>> + if (dev->features[0] & NETIF_F_NETNS_LOCAL)
>> continue;
>>
>> /* Leave virtual devices for the generic cleanup */
>> diff --git a/net/core/netpoll.c b/net/core/netpoll.c
>> index 0a6b047..2c0adf4 100644
>> --- a/net/core/netpoll.c
>> +++ b/net/core/netpoll.c
>> @@ -74,13 +74,13 @@ static netdev_tx_t netpoll_start_xmit(struct sk_buff *skb,
>> struct net_device *dev,
>> struct netdev_queue *txq)
>> {
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS];
>> netdev_tx_t status = NETDEV_TX_OK;
>> - netdev_features_t features;
>>
>> - features = netif_skb_features(skb);
>> + netif_skb_features(skb, features);
>>
>> if (skb_vlan_tag_present(skb) &&
>> - !vlan_hw_offload_capable(features, skb->vlan_proto)) {
>> + !vlan_hw_offload_capable(features[0], skb->vlan_proto)) {
>> skb = __vlan_hwaccel_push_inside(skb);
>> if (unlikely(!skb)) {
>> /* This is actually a packet drop, but we
>> diff --git a/net/ethtool/features.c b/net/ethtool/features.c
>> index 1c9f4df..0eedb17 100644
>> --- a/net/ethtool/features.c
>> +++ b/net/ethtool/features.c
>> @@ -25,12 +25,13 @@ const struct nla_policy ethnl_features_get_policy[] = {
>> NLA_POLICY_NESTED(ethnl_header_policy),
>> };
>>
>> -static void ethnl_features_to_bitmap32(u32 *dest, netdev_features_t src)
>> +static void ethnl_features_to_bitmap32(u32 *dest, netdev_features_t *src)
>> {
>> + u32 *__src = (u32 *)src;
>> unsigned int i;
>>
>> for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; i++)
>> - dest[i] = src >> (32 * i);
>> + dest[i] = __src[i];
>> }
>>
>> static int features_prepare_data(const struct ethnl_req_info *req_base,
>> @@ -38,15 +39,23 @@ static int features_prepare_data(const struct ethnl_req_info *req_base,
>> struct genl_info *info)
>> {
>> struct features_reply_data *data = FEATURES_REPDATA(reply_base);
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS] = {0};
>> struct net_device *dev = reply_base->dev;
>> - netdev_features_t all_features;
>> + unsigned int i;
>>
>> ethnl_features_to_bitmap32(data->hw, dev->hw_features);
>> ethnl_features_to_bitmap32(data->wanted, dev->wanted_features);
>> ethnl_features_to_bitmap32(data->active, dev->features);
>> - ethnl_features_to_bitmap32(data->nochange, NETIF_F_NEVER_CHANGE);
>> - all_features = GENMASK_ULL(NETDEV_FEATURE_COUNT - 1, 0);
>> - ethnl_features_to_bitmap32(data->all, all_features);
>> + features[0] = NETIF_F_NEVER_CHANGE;
>> + ethnl_features_to_bitmap32(data->nochange, features);
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++) {
>> + if (NETDEV_FEATURE_COUNT >= (i + 1) * 64)
>> + features[i] = GENMASK_ULL(63, 0);
>> + else
>> + features[i] = GENMASK_ULL(NETDEV_FEATURE_COUNT - i * 64,
>> + 0);
>> + }
>> + ethnl_features_to_bitmap32(data->all, features);
>>
>> return 0;
>> }
>> @@ -131,27 +140,29 @@ const struct nla_policy ethnl_features_set_policy[] = {
>> [ETHTOOL_A_FEATURES_WANTED] = { .type = NLA_NESTED },
>> };
>>
>> -static void ethnl_features_to_bitmap(unsigned long *dest, netdev_features_t val)
>> +static void ethnl_features_to_bitmap(unsigned long *dest,
>> + netdev_features_t *val)
>> {
>> const unsigned int words = BITS_TO_LONGS(NETDEV_FEATURE_COUNT);
>> unsigned int i;
>>
>> bitmap_zero(dest, NETDEV_FEATURE_COUNT);
>> for (i = 0; i < words; i++)
>> - dest[i] = (unsigned long)(val >> (i * BITS_PER_LONG));
>> + dest[i] =
>> + (unsigned long)(val[i / 2] >> (i % 2 * BITS_PER_LONG));
>> }
>>
>> -static netdev_features_t ethnl_bitmap_to_features(unsigned long *src)
>> +static void ethnl_bitmap_to_features(netdev_features_t *val, unsigned long *src)
>> {
>> - const unsigned int nft_bits = sizeof(netdev_features_t) * BITS_PER_BYTE;
>> const unsigned int words = BITS_TO_LONGS(NETDEV_FEATURE_COUNT);
>> - netdev_features_t ret = 0;
>> unsigned int i;
>>
>> + for (i = 0; i < NETDEV_FEATURE_DWORDS; i++)
>> + val[i] = 0;
>> +
>> for (i = 0; i < words; i++)
>> - ret |= (netdev_features_t)(src[i]) << (i * BITS_PER_LONG);
>> - ret &= ~(netdev_features_t)0 >> (nft_bits - NETDEV_FEATURE_COUNT);
>> - return ret;
>> + val[i / 2] |=
>> + (netdev_features_t)(src[i]) << (i % 2 * BITS_PER_LONG);
>> }
>>
>> static int features_send_reply(struct net_device *dev, struct genl_info *info,
>> @@ -212,12 +223,14 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
>> {
>> DECLARE_BITMAP(wanted_diff_mask, NETDEV_FEATURE_COUNT);
>> DECLARE_BITMAP(active_diff_mask, NETDEV_FEATURE_COUNT);
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS];
>> DECLARE_BITMAP(old_active, NETDEV_FEATURE_COUNT);
>> DECLARE_BITMAP(old_wanted, NETDEV_FEATURE_COUNT);
>> DECLARE_BITMAP(new_active, NETDEV_FEATURE_COUNT);
>> DECLARE_BITMAP(new_wanted, NETDEV_FEATURE_COUNT);
>> DECLARE_BITMAP(req_wanted, NETDEV_FEATURE_COUNT);
>> DECLARE_BITMAP(req_mask, NETDEV_FEATURE_COUNT);
>> + netdev_features_t tmp[NETDEV_FEATURE_DWORDS];
>> struct ethnl_req_info req_info = {};
>> struct nlattr **tb = info->attrs;
>> struct net_device *dev;
>> @@ -242,7 +255,11 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
>> netdev_features_strings, info->extack);
>> if (ret < 0)
>> goto out_rtnl;
>> - if (ethnl_bitmap_to_features(req_mask) & ~NETIF_F_ETHTOOL_BITS) {
>> +
>> + ethnl_bitmap_to_features(features, req_mask);
>> + netdev_features_ethtool_bits(tmp);
>> + netdev_features_andnot(features, features, tmp);
>> + if (!netdev_features_empty(features)) {
>> GENL_SET_ERR_MSG(info, "attempt to change non-ethtool features");
>> ret = -EINVAL;
>> goto out_rtnl;
>> @@ -253,8 +270,13 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
>> bitmap_andnot(new_wanted, old_wanted, req_mask, NETDEV_FEATURE_COUNT);
>> bitmap_or(req_wanted, new_wanted, req_wanted, NETDEV_FEATURE_COUNT);
>> if (!bitmap_equal(req_wanted, old_wanted, NETDEV_FEATURE_COUNT)) {
>> - dev->wanted_features &= ~dev->hw_features;
>> - dev->wanted_features |= ethnl_bitmap_to_features(req_wanted) & dev->hw_features;
>> + netdev_features_andnot(dev->wanted_features,
>> + dev->wanted_features,
>> + dev->hw_features);
>> + ethnl_bitmap_to_features(features, req_wanted);
>> + netdev_features_and(features, features, dev->hw_features);
>> + netdev_features_or(dev->wanted_features, dev->wanted_features,
>> + features);
>> __netdev_update_features(dev);
>> }
>> ethnl_features_to_bitmap(new_active, dev->features);
>> diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
>> index baa5d10..f213ec9 100644
>> --- a/net/ethtool/ioctl.c
>> +++ b/net/ethtool/ioctl.c
>> @@ -67,12 +67,15 @@ static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
>> int i;
>>
>> /* in case feature bits run out again */
>> - BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(netdev_features_t));
>> + BUILD_BUG_ON(ETHTOOL_DEV_FEATURE_WORDS * sizeof(u32) > sizeof(dev->features));
>>
>> for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
>> - features[i].available = (u32)(dev->hw_features >> (32 * i));
>> - features[i].requested = (u32)(dev->wanted_features >> (32 * i));
>> - features[i].active = (u32)(dev->features >> (32 * i));
>> + features[i].available =
>> + (u32)(dev->hw_features[i / 2] >> (i % 2 * 32));
>> + features[i].requested =
>> + (u32)(dev->wanted_features[i / 2] >> (i % 2 * 32));
>> + features[i].active =
>> + (u32)(dev->features[i / 2] >> (i % 2 * 32));
>> features[i].never_changed =
>> (u32)(NETIF_F_NEVER_CHANGE >> (32 * i));
>> }
>> @@ -97,7 +100,9 @@ static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
>> {
>> struct ethtool_sfeatures cmd;
>> struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
>> - netdev_features_t wanted = 0, valid = 0;
>> + netdev_features_t wanted[NETDEV_FEATURE_DWORDS] = {0};
>> + netdev_features_t valid[NETDEV_FEATURE_DWORDS] = {0};
>> + netdev_features_t tmp[NETDEV_FEATURE_DWORDS];
>> int i, ret = 0;
>>
>> if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
>> @@ -111,23 +116,33 @@ static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
>> return -EFAULT;
>>
>> for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; ++i) {
>> - valid |= (netdev_features_t)features[i].valid << (32 * i);
>> - wanted |= (netdev_features_t)features[i].requested << (32 * i);
>> + valid[i / 2] |=
>> + (netdev_features_t)features[i].valid << (32 * i);
>> + wanted[i / 2] |=
>> + (netdev_features_t)features[i].requested << (32 * i);
>> }
>>
>> - if (valid & ~NETIF_F_ETHTOOL_BITS)
>> + netdev_features_ethtool_bits(tmp);
>> + netdev_features_andnot(tmp, features, tmp);
>> + if (!netdev_features_empty(tmp))
>> return -EINVAL;
>>
>> - if (valid & ~dev->hw_features) {
>> - valid &= dev->hw_features;
>> + netdev_features_andnot(tmp, valid, dev->hw_features);
>> +
>> + if (!netdev_features_empty(tmp)) {
>> + netdev_features_and(valid, valid, dev->hw_features);
>> ret |= ETHTOOL_F_UNSUPPORTED;
>> }
>>
>> - dev->wanted_features &= ~valid;
>> - dev->wanted_features |= wanted & valid;
>> + netdev_features_andnot(dev->wanted_features, dev->wanted_features,
>> + valid);
>> + netdev_features_and(wanted, wanted, valid);
>> + netdev_features_or(dev->wanted_features, dev->wanted_features, wanted);
>> __netdev_update_features(dev);
>>
>> - if ((dev->wanted_features ^ dev->features) & valid)
>> + netdev_features_xor(tmp, dev->wanted_features, dev->features);
>> + netdev_features_and(tmp, tmp, valid);
>> + if (!netdev_features_empty(tmp))
>> ret |= ETHTOOL_F_WISH;
>>
>> return ret;
>> @@ -227,7 +242,7 @@ static int ethtool_get_one_feature(struct net_device *dev,
>> netdev_features_t mask = ethtool_get_feature_mask(ethcmd);
>> struct ethtool_value edata = {
>> .cmd = ethcmd,
>> - .data = !!(dev->features & mask),
>> + .data = !!(dev->features[0] & mask),
>> };
>>
>> if (copy_to_user(useraddr, &edata, sizeof(edata)))
>> @@ -238,21 +253,23 @@ static int ethtool_get_one_feature(struct net_device *dev,
>> static int ethtool_set_one_feature(struct net_device *dev,
>> void __user *useraddr, u32 ethcmd)
>> {
>> + netdev_features_t mask[NETDEV_FEATURE_DWORDS] = {0};
>> struct ethtool_value edata;
>> - netdev_features_t mask;
>>
>> if (copy_from_user(&edata, useraddr, sizeof(edata)))
>> return -EFAULT;
>>
>> - mask = ethtool_get_feature_mask(ethcmd);
>> - mask &= dev->hw_features;
>> - if (!mask)
>> + mask[0] = ethtool_get_feature_mask(ethcmd);
>> + netdev_features_and(mask, mask, dev->hw_features);
>> + if (netdev_features_empty(mask))
>> return -EOPNOTSUPP;
>>
>> if (edata.data)
>> - dev->wanted_features |= mask;
>> + netdev_features_or(dev->wanted_features, dev->wanted_features,
>> + mask)
>> else
>> - dev->wanted_features &= ~mask;
>> + netdev_features_andnot(dev->wanted_features,
>> + dev->wanted_features, mask);
>>
>> __netdev_update_features(dev);
>>
>> @@ -285,29 +302,37 @@ static u32 __ethtool_get_flags(struct net_device *dev)
>>
>> static int __ethtool_set_flags(struct net_device *dev, u32 data)
>> {
>> - netdev_features_t features = 0, changed;
>> + netdev_features_t features[NETDEV_FEATURE_DWORDS] = {0};
>> + netdev_features_t changed[NETDEV_FEATURE_DWORDS];
>> + netdev_features_t tmp[NETDEV_FEATURE_DWORDS];
>>
>> if (data & ~ETH_ALL_FLAGS)
>> return -EINVAL;
>>
>> if (data & ETH_FLAG_LRO)
>> - features |= NETIF_F_LRO;
>> + features[0] |= NETIF_F_LRO;
>> if (data & ETH_FLAG_RXVLAN)
>> - features |= NETIF_F_HW_VLAN_CTAG_RX;
>> + features[0] |= NETIF_F_HW_VLAN_CTAG_RX;
>> if (data & ETH_FLAG_TXVLAN)
>> - features |= NETIF_F_HW_VLAN_CTAG_TX;
>> + features[0] |= NETIF_F_HW_VLAN_CTAG_TX;
>> if (data & ETH_FLAG_NTUPLE)
>> - features |= NETIF_F_NTUPLE;
>> + features[0] |= NETIF_F_NTUPLE;
>> if (data & ETH_FLAG_RXHASH)
>> - features |= NETIF_F_RXHASH;
>> + features[0] |= NETIF_F_RXHASH;
>>
>> /* allow changing only bits set in hw_features */
>> - changed = (features ^ dev->features) & ETH_ALL_FEATURES;
>> - if (changed & ~dev->hw_features)
>> - return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
>> + netdev_features_xor(changed, features, dev->features);
>> + changed[0] &= ETH_ALL_FEATURES;
>> +
>> + netdev_features_andnot(tmp, changed, dev->hw_features);
>> + if (!netdev_features_empty(tmp)) {
>> + netdev_features_and(tmp, changed, dev->hw_features);
>> + return (!netdev_features_empty(tmp)) ? -EINVAL : -EOPNOTSUPP;
>> + }
>>
>> - dev->wanted_features =
>> - (dev->wanted_features & ~changed) | (features & changed);
>> + netdev_features_andnot(tmp, dev->wanted_features, changed);
>> + netdev_features_and(features, features, changed);
>> + netdev_features_or(dev->wanted_features, tmp, features);
>>
>> __netdev_update_features(dev);
>>
>> @@ -2587,7 +2612,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
>> void __user *useraddr = ifr->ifr_data;
>> u32 ethcmd, sub_cmd;
>> int rc;
>> - netdev_features_t old_features;
>> + netdev_features_t old_features[NETDEV_FEATURE_DWORDS];
>>
>> if (!dev || !netif_device_present(dev))
>> return -ENODEV;
>> @@ -2650,7 +2675,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
>> if (rc < 0)
>> return rc;
>> }
>> - old_features = dev->features;
>> + netdev_features_copy(old_features, dev->features);
>>
>> switch (ethcmd) {
>> case ETHTOOL_GSET:
>> @@ -2865,7 +2890,7 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
>> if (dev->ethtool_ops->complete)
>> dev->ethtool_ops->complete(dev);
>>
>> - if (old_features != dev->features)
>> + if (!netdev_features_equal(old_features, dev->features))
>> netdev_features_change(dev);
>>
>> return rc;
> Wouldn't be a bitmap more appropriate? Basically the same challenge we had
> for PHY link modes, what resultet in __ETHTOOL_DECLARE_LINK_MODE_MASK et al.
> .
Hi Heiner,
Thanks for your advise.
I have thought of using linkmode_ before
(https://lists.openwall.net/netdev/2021/06/19/11).
As my last reply to Andrew, I'm not sure which way is better, and want
to get some more suggestions.
I sent a question to
kernel（https://www.spinics.net/lists/netdev/msg749100.html）,
and got no reply, so I made this attempt.
Thanks!
Jian Shen
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