[PATCH RFC net-next 7/7] netdev_features: convert NETIF_F_FCOE_MTU to IFF_FCOE_MTU

From: Alexander Lobakin
Date: Fri Apr 05 2024 - 09:41:23 EST

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Ability to handle maximum FCoE frames of 2158 bytes can never be changed
and thus more of an attribute, not a toggleable feature.
Move it from netdev_features_t to netdev_priv_flags and free one more
feature bit.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
---
include/linux/netdev_features.h | 5 +----
include/linux/netdevice.h | 2 ++
drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c | 6 ++----
drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c | 2 +-
drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c | 4 ++--
drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c | 3 +--
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 9 ++++-----
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 4 ++--
drivers/scsi/fcoe/fcoe.c | 4 ++--
net/8021q/vlan_dev.c | 1 +
net/ethtool/common.c | 1 -
11 files changed, 18 insertions(+), 23 deletions(-)

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 318c35c94305..9713069198e1 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -53,7 +53,6 @@ enum {

NETIF_F_FCOE_CRC_BIT, /* FCoE CRC32 */
NETIF_F_SCTP_CRC_BIT, /* SCTP checksum offload */
- NETIF_F_FCOE_MTU_BIT, /* Supports max FCoE MTU, 2158 bytes*/
NETIF_F_NTUPLE_BIT, /* N-tuple filters supported */
NETIF_F_RXHASH_BIT, /* Receive hashing offload */
NETIF_F_RXCSUM_BIT, /* Receive checksumming offload */
@@ -100,7 +99,6 @@ enum {
#define __NETIF_F(name) __NETIF_F_BIT(NETIF_F_##name##_BIT)

#define NETIF_F_FCOE_CRC __NETIF_F(FCOE_CRC)
-#define NETIF_F_FCOE_MTU __NETIF_F(FCOE_MTU)
#define NETIF_F_FRAGLIST __NETIF_F(FRAGLIST)
#define NETIF_F_FSO __NETIF_F(FSO)
#define NETIF_F_GRO __NETIF_F(GRO)
@@ -200,8 +198,7 @@ static inline int find_next_netdev_feature(u64 feature, unsigned long start)
#define NETIF_F_ALL_TSO (NETIF_F_TSO | NETIF_F_TSO6 | \
NETIF_F_TSO_ECN | NETIF_F_TSO_MANGLEID)

-#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FCOE_MTU | \
- NETIF_F_FSO)
+#define NETIF_F_ALL_FCOE (NETIF_F_FCOE_CRC | NETIF_F_FSO)

/* List of features with software fallbacks. */
#define NETIF_F_GSO_SOFTWARE (NETIF_F_ALL_TSO | NETIF_F_GSO_SCTP | \
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 57b8d3783b3f..09e25163e3d8 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1654,6 +1654,7 @@ struct net_device_ops {
* @IFF_NETNS_LOCAL: interface can't change network namespaces
* @IFF_HIGHDMA: device can transmit buffers from high memory
* @IFF_VLAN_CHALLENGED: device can't handle VLAN packets
+ * @IFF_FCOE_MTU: device supports maximum FCoE MTU, 2158 bytes
* @IFF_LOGICAL: combines @IFF_NO_QUEUE and @IFF_LLTX, used by logical
* interfaces to avoid overhead from locking and Qdisc.
* @IFF_ONE_FOR_ALL: if one interface supports them, enable them for all in
@@ -1700,6 +1701,7 @@ enum netdev_priv_flags {
IFF_NETNS_LOCAL = BIT_ULL(35),
IFF_HIGHDMA = BIT_ULL(36),
IFF_VLAN_CHALLENGED = BIT_ULL(37),
+ IFF_FCOE_MTU = BIT_ULL(38),
IFF_LOGICAL = IFF_NO_QUEUE | IFF_LLTX,
IFF_ONE_FOR_ALL = IFF_HIGHDMA | IFF_VLAN_CHALLENGED,
IFF_ALL_FOR_ALL = IFF_XMIT_DST_RELEASE |
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
index 33b2c0c45509..6f6f36f06bb5 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_fcoe.c
@@ -81,8 +81,7 @@ int cxgb_fcoe_enable(struct net_device *netdev)

netdev->features |= NETIF_F_FCOE_CRC;
netdev->vlan_features |= NETIF_F_FCOE_CRC;
- netdev->features |= NETIF_F_FCOE_MTU;
- netdev->vlan_features |= NETIF_F_FCOE_MTU;
+ netdev->priv_flags |= IFF_FCOE_MTU;

netdev_features_change(netdev);

@@ -112,8 +111,7 @@ int cxgb_fcoe_disable(struct net_device *netdev)

netdev->features &= ~NETIF_F_FCOE_CRC;
netdev->vlan_features &= ~NETIF_F_FCOE_CRC;
- netdev->features &= ~NETIF_F_FCOE_MTU;
- netdev->vlan_features &= ~NETIF_F_FCOE_MTU;
+ netdev->priv_flags &= ~IFF_FCOE_MTU;

netdev_features_change(netdev);

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c
index e85f7d2e8810..dcfebe9f6aa6 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c
@@ -317,7 +317,7 @@ static u8 ixgbe_dcbnl_set_all(struct net_device *netdev)
int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;

#ifdef IXGBE_FCOE
- if (adapter->netdev->features & NETIF_F_FCOE_MTU)
+ if (adapter->netdev->priv_flags & IFF_FCOE_MTU)
max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
#endif

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
index 18d63c8c2ff4..3be287a11a96 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
@@ -858,7 +858,7 @@ int ixgbe_fcoe_enable(struct net_device *netdev)

/* enable FCoE and notify stack */
adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
- netdev->features |= NETIF_F_FCOE_MTU;
+ netdev->priv_flags |= IFF_FCOE_MTU;
netdev_features_change(netdev);

/* release existing queues and reallocate them */
@@ -898,7 +898,7 @@ int ixgbe_fcoe_disable(struct net_device *netdev)

/* disable FCoE and notify stack */
adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
- netdev->features &= ~NETIF_F_FCOE_MTU;
+ netdev->priv_flags &= ~IFF_FCOE_MTU;

netdev_features_change(netdev);

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
index 0ee943db3dc9..81eda51a79e0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_lib.c
@@ -981,7 +981,7 @@ static int ixgbe_alloc_q_vector(struct ixgbe_adapter *adapter,
set_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state);

#ifdef IXGBE_FCOE
- if (adapter->netdev->features & NETIF_F_FCOE_MTU) {
+ if (adapter->netdev->priv_flags & IFF_FCOE_MTU) {
struct ixgbe_ring_feature *f;
f = &adapter->ring_feature[RING_F_FCOE];
if ((rxr_idx >= f->offset) &&
@@ -1299,4 +1299,3 @@ void ixgbe_tx_ctxtdesc(struct ixgbe_ring *tx_ring, u32 vlan_macip_lens,
context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
}
-
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index da5d21d55278..b49208a75c9c 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -5080,7 +5080,7 @@ static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
netif_set_tso_max_size(adapter->netdev, 32768);

#ifdef IXGBE_FCOE
- if (adapter->netdev->features & NETIF_F_FCOE_MTU)
+ if (adapter->netdev->priv_flags & IFF_FCOE_MTU)
max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
#endif

@@ -5137,7 +5137,7 @@ static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)

#ifdef IXGBE_FCOE
/* FCoE traffic class uses FCOE jumbo frames */
- if ((dev->features & NETIF_F_FCOE_MTU) &&
+ if ((dev->priv_flags & IFF_FCOE_MTU) &&
(tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
(pb == ixgbe_fcoe_get_tc(adapter)))
tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
@@ -5198,7 +5198,7 @@ static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)

#ifdef IXGBE_FCOE
/* FCoE traffic class uses FCOE jumbo frames */
- if ((dev->features & NETIF_F_FCOE_MTU) &&
+ if ((dev->priv_flags & IFF_FCOE_MTU) &&
(tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
(pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
@@ -11096,8 +11096,7 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
NETIF_F_FCOE_CRC;

netdev->vlan_features |= NETIF_F_FSO |
- NETIF_F_FCOE_CRC |
- NETIF_F_FCOE_MTU;
+ NETIF_F_FCOE_CRC;
}
#endif /* IXGBE_FCOE */
if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index fcfd0a075eee..4e478cf79a2c 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -495,7 +495,7 @@ static int ixgbe_set_vf_lpe(struct ixgbe_adapter *adapter, u32 max_frame, u32 vf
int err = 0;

#ifdef CONFIG_FCOE
- if (dev->features & NETIF_F_FCOE_MTU)
+ if (dev->priv_flags & IFF_FCOE_MTU)
pf_max_frame = max_t(int, pf_max_frame,
IXGBE_FCOE_JUMBO_FRAME_SIZE);

@@ -857,7 +857,7 @@ static void ixgbe_set_vf_rx_tx(struct ixgbe_adapter *adapter, int vf)
int pf_max_frame = dev->mtu + ETH_HLEN;

#if IS_ENABLED(CONFIG_FCOE)
- if (dev->features & NETIF_F_FCOE_MTU)
+ if (dev->priv_flags & IFF_FCOE_MTU)
pf_max_frame = max_t(int, pf_max_frame,
IXGBE_FCOE_JUMBO_FRAME_SIZE);
#endif /* CONFIG_FCOE */
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index f1429f270170..19a16a63d969 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -722,7 +722,7 @@ static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
* will return 0, so do this first.
*/
mfs = netdev->mtu;
- if (netdev->features & NETIF_F_FCOE_MTU) {
+ if (netdev->priv_flags & IFF_FCOE_MTU) {
mfs = FCOE_MTU;
FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
}
@@ -1863,7 +1863,7 @@ static int fcoe_device_notification(struct notifier_block *notifier,
case NETDEV_CHANGE:
break;
case NETDEV_CHANGEMTU:
- if (netdev->features & NETIF_F_FCOE_MTU)
+ if (netdev->priv_flags & IFF_FCOE_MTU)
break;
mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
sizeof(struct fcoe_crc_eof));
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 421419ebac41..69afcba94b8e 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -570,6 +570,7 @@ static int vlan_dev_init(struct net_device *dev)

dev->features |= dev->hw_features;
dev->priv_flags |= IFF_LLTX | (real_dev->priv_flags & IFF_HIGHDMA);
+ dev->priv_flags |= IFF_FCOE_MTU;
netif_inherit_tso_max(dev, real_dev);
if (dev->features & NETIF_F_VLAN_FEATURES)
netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n");
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 2de4dd5a30de..71e36e1a1b15 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -47,7 +47,6 @@ const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN] = {

[NETIF_F_FCOE_CRC_BIT] = "tx-checksum-fcoe-crc",
[NETIF_F_SCTP_CRC_BIT] = "tx-checksum-sctp",
- [NETIF_F_FCOE_MTU_BIT] = "fcoe-mtu",
[NETIF_F_NTUPLE_BIT] = "rx-ntuple-filter",
[NETIF_F_RXHASH_BIT] = "rx-hashing",
[NETIF_F_RXCSUM_BIT] = "rx-checksum",
--
2.44.0

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