Merge tag 'net-next-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "This is slightly smaller than usual, with the most interesting work
  being still around RTNL scope reduction.

  Core:

   - More core refactoring to reduce the RTNL lock contention, including
     preparatory work for the per-network namespace RTNL lock, replacing
     RTNL lock with a per device-one to protect NAPI-related net device
     data and moving synchronize_net() calls outside such lock.

   - Extend drop reasons usage, adding net scheduler, AF_UNIX, bridge
     and more specific TCP coverage.

   - Reduce network namespace tear-down time by removing per-subsystems
     synchronize_net() in tipc and sched.

   - Add flow label selector support for fib rules, allowing traffic
     redirection based on such header field.

  Netfilter:

   - Do not remove netdev basechain when last device is gone, allowing
     netdev basechains without devices.

   - Revisit the flowtable teardown strategy, dealing better with fin,
     reset and re-open events.

   - Scale-up IP-vs connection dumping by avoiding linear search on each
     restart.

  Protocols:

   - A significant XDP socket refactor, consolidating and optimizing
     several helpers into the core

   - Better scaling of ICMP rate-limiting, by removing false-sharing in
     inet peers handling.

   - Introduces netlink notifications for multicast IPv4 and IPv6
     address changes.

   - Add ipsec support for IP-TFS/AggFrag encapsulation, allowing
     aggregation and fragmentation of the inner IP.

   - Add sysctl to configure TIME-WAIT reuse delay for TCP sockets, to
     avoid local port exhaustion issues when the average connection
     lifetime is very short.

   - Support updating keys (re-keying) for connections using kernel TLS
     (for TLS 1.3 only).

   - Support ipv4-mapped ipv6 address clients in smc-r v2.

   - Add support for jumbo data packet transmission in RxRPC sockets,
     gluing multiple data packets in a single UDP packet.

   - Support RxRPC RACK-TLP to manage packet loss and retransmission in
     conjunction with the congestion control algorithm.

  Driver API:

   - Introduce a unified and structured interface for reporting PHY
     statistics, exposing consistent data across different H/W via
     ethtool.

   - Make timestamping selectable, allow the user to select the desired
     hwtstamp provider (PHY or MAC) administratively.

   - Add support for configuring a header-data-split threshold (HDS)
     value via ethtool, to deal with partial or buggy H/W
     implementation.

   - Consolidate DSA drivers Energy Efficiency Ethernet support.

   - Add EEE management to phylink, making use of the phylib
     implementation.

   - Add phylib support for in-band capabilities negotiation.

   - Simplify how phylib-enabled mac drivers expose the supported
     interfaces.

  Tests and tooling:

   - Make the YNL tool package-friendly to make it easier to deploy it
     separately from the kernel.

   - Increase TCP selftest coverage importing several packetdrill
     test-cases.

   - Regenerate the ethtool uapi header from the YNL spec, to ease
     maintenance and future development.

   - Add YNL support for decoding the link types used in net self-tests,
     allowing a single build to run both net and drivers/net.

  Drivers:

   - Ethernet high-speed NICs:
      - nVidia/Mellanox (mlx5):
         - add cross E-Switch QoS support
         - add SW Steering support for ConnectX-8
         - implement support for HW-Managed Flow Steering, improving the
           rule deletion/insertion rate
         - support for multi-host LAG
      - Intel (ixgbe, ice, igb):
         - ice: add support for devlink health events
         - ixgbe: add initial support for E610 chipset variant
         - igb: add support for AF_XDP zero-copy
      - Meta:
         - add support for basic RSS config
         - allow changing the number of channels
         - add hardware monitoring support
      - Broadcom (bnxt):
         - implement TCP data split and HDS threshold ethtool support,
           enabling Device Memory TCP.
      - Marvell Octeon:
         - implement egress ipsec offload support for the cn10k family
      - Hisilicon (HIBMC):
         - implement unicast MAC filtering

   - Ethernet NICs embedded and virtual:
      - Convert UDP tunnel drivers to NETDEV_PCPU_STAT_DSTATS, avoiding
        contented atomic operations for drop counters
      - Freescale:
         - quicc: phylink conversion
         - enetc: support Tx and Rx checksum offload and improve TSO
           performances
      - MediaTek:
         - airoha: introduce support for ETS and HTB Qdisc offload
      - Microchip:
         - lan78XX USB: preparation work for phylink conversion
      - Synopsys (stmmac):
         - support DWMAC IP on NXP Automotive SoCs S32G2xx/S32G3xx/S32R45
         - refactor EEE support to leverage the new driver API
         - optimize DMA and cache access to increase raw RX performances
           by 40%
      - TI:
         - icssg-prueth: add multicast filtering support for VLAN
           interface
      - netkit:
         - add ability to configure head/tailroom
      - VXLAN:
         - accepts packets with user-defined reserved bit

   - Ethernet switches:
      - Microchip:
         - lan969x: add RGMII support
         - lan969x: improve TX and RX performance using the FDMA engine
      - nVidia/Mellanox:
         - move Tx header handling to PCI driver, to ease XDP support

   - Ethernet PHYs:
      - Texas Instruments DP83822:
         - add support for GPIO2 clock output
      - Realtek:
         - 8169: add support for RTL8125D rev.b
         - rtl822x: add hwmon support for the temperature sensor
      - Microchip:
         - add support for RDS PTP hardware
         - consolidate periodic output signal generation

   - CAN:
      - several DT-bindings to DT schema conversions
      - tcan4x5x:
         - add HW standby support
         - support nWKRQ voltage selection
      - kvaser:
         - allowing Bus Error Reporting runtime configuration

   - WiFi:
      - the on-going Multi-Link Operation (MLO) effort continues,
        affecting both the stack and in drivers
      - mac80211/cfg80211:
         - Emergency Preparedness Communication Services (EPCS) station
           mode support
         - support for adding and removing station links for MLO
         - add support for WiFi 7/EHT mesh over 320 MHz channels
         - report Tx power info for each link
      - RealTek (rtw88):
         - enable USB Rx aggregation and USB 3 to improve performance
         - LED support
      - RealTek (rtw89):
         - refactor power save to support Multi-Link Operations
         - add support for RTL8922AE-VS variant
      - MediaTek (mt76):
         - single wiphy multiband support (preparation for MLO)
         - p2p device support
         - add TP-Link TXE50UH USB adapter support
      - Qualcomm (ath10k):
         - support for the QCA6698AQ IP core
      - Qualcomm (ath12k):
         - enable MLO for QCN9274

   - Bluetooth:
      - Allow sysfs to trigger hdev reset, to allow recovering devices
        not responsive from user-space
      - MediaTek: add support for MT7922, MT7925, MT7921e devices
      - Realtek: add support for RTL8851BE devices
      - Qualcomm: add support for WCN785x devices
      - ISO: allow BIG re-sync"

* tag 'net-next-6.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1386 commits)
  net/rose: prevent integer overflows in rose_setsockopt()
  net: phylink: fix regression when binding a PHY
  net: ethernet: ti: am65-cpsw: streamline TX queue creation and cleanup
  net: ethernet: ti: am65-cpsw: streamline RX queue creation and cleanup
  net: ethernet: ti: am65-cpsw: ensure proper channel cleanup in error path
  ipv6: Convert inet6_rtm_deladdr() to per-netns RTNL.
  ipv6: Convert inet6_rtm_newaddr() to per-netns RTNL.
  ipv6: Move lifetime validation to inet6_rtm_newaddr().
  ipv6: Set cfg.ifa_flags before device lookup in inet6_rtm_newaddr().
  ipv6: Pass dev to inet6_addr_add().
  ipv6: Convert inet6_ioctl() to per-netns RTNL.
  ipv6: Hold rtnl_net_lock() in addrconf_init() and addrconf_cleanup().
  ipv6: Hold rtnl_net_lock() in addrconf_dad_work().
  ipv6: Hold rtnl_net_lock() in addrconf_verify_work().
  ipv6: Convert net.ipv6.conf.${DEV}.XXX sysctl to per-netns RTNL.
  ipv6: Add __in6_dev_get_rtnl_net().
  net: stmmac: Drop redundant skb_mark_for_recycle() for SKB frags
  net: mii: Fix the Speed display when the network cable is not connected
  sysctl net: Remove macro checks for CONFIG_SYSCTL
  eth: bnxt: update header sizing defaults
  ...

1 files changed, 43 insertions, 23 deletions

diff --git a/drivers/net/netkit.c b/drivers/net/netkit.c
index c1d881dc6409..1e1b00756be7 100644
--- a/drivers/net/netkit.c
+++ b/drivers/net/netkit.c
@@ -338,6 +338,7 @@ static int netkit_new_link(struct net *peer_net, struct net_device *dev,
 	enum netkit_scrub scrub_peer = NETKIT_SCRUB_DEFAULT;
 	enum netkit_mode mode = NETKIT_L3;
 	unsigned char ifname_assign_type;
+	u16 headroom = 0, tailroom = 0;
 	struct ifinfomsg *ifmp = NULL;
 	struct net_device *peer;
 	char ifname[IFNAMSIZ];
@@ -371,6 +372,10 @@ static int netkit_new_link(struct net *peer_net, struct net_device *dev,
 			if (err < 0)
 				return err;
 		}
+		if (data[IFLA_NETKIT_HEADROOM])
+			headroom = nla_get_u16(data[IFLA_NETKIT_HEADROOM]);
+		if (data[IFLA_NETKIT_TAILROOM])
+			tailroom = nla_get_u16(data[IFLA_NETKIT_TAILROOM]);
 	}
 
 	if (ifmp && tbp[IFLA_IFNAME]) {
@@ -390,6 +395,14 @@ static int netkit_new_link(struct net *peer_net, struct net_device *dev,
 		return PTR_ERR(peer);
 
 	netif_inherit_tso_max(peer, dev);
+	if (headroom) {
+		peer->needed_headroom = headroom;
+		dev->needed_headroom = headroom;
+	}
+	if (tailroom) {
+		peer->needed_tailroom = tailroom;
+		dev->needed_tailroom = tailroom;
+	}
 
 	if (mode == NETKIT_L2 && !(ifmp && tbp[IFLA_ADDRESS]))
 		eth_hw_addr_random(peer);
@@ -401,6 +414,7 @@ static int netkit_new_link(struct net *peer_net, struct net_device *dev,
 	nk->policy = policy_peer;
 	nk->scrub = scrub_peer;
 	nk->mode = mode;
+	nk->headroom = headroom;
 	bpf_mprog_bundle_init(&nk->bundle);
 
 	err = register_netdevice(peer);
@@ -426,6 +440,7 @@ static int netkit_new_link(struct net *peer_net, struct net_device *dev,
 	nk->policy = policy_prim;
 	nk->scrub = scrub_prim;
 	nk->mode = mode;
+	nk->headroom = headroom;
 	bpf_mprog_bundle_init(&nk->bundle);
 
 	err = register_netdevice(dev);
@@ -850,7 +865,18 @@ static int netkit_change_link(struct net_device *dev, struct nlattr *tb[],
 	struct net_device *peer = rtnl_dereference(nk->peer);
 	enum netkit_action policy;
 	struct nlattr *attr;
-	int err;
+	int err, i;
+	static const struct {
+		u32 attr;
+		char *name;
+	} fixed_params[] = {
+		{ IFLA_NETKIT_MODE,       "operating mode" },
+		{ IFLA_NETKIT_SCRUB,      "scrubbing" },
+		{ IFLA_NETKIT_PEER_SCRUB, "peer scrubbing" },
+		{ IFLA_NETKIT_PEER_INFO,  "peer info" },
+		{ IFLA_NETKIT_HEADROOM,   "headroom" },
+		{ IFLA_NETKIT_TAILROOM,   "tailroom" },
+	};
 
 	if (!nk->primary) {
 		NL_SET_ERR_MSG(extack,
@@ -858,28 +884,14 @@ static int netkit_change_link(struct net_device *dev, struct nlattr *tb[],
 		return -EACCES;
 	}
 
-	if (data[IFLA_NETKIT_MODE]) {
-		NL_SET_ERR_MSG_ATTR(extack, data[IFLA_NETKIT_MODE],
-				    "netkit link operating mode cannot be changed after device creation");
-		return -EACCES;
-	}
-
-	if (data[IFLA_NETKIT_SCRUB]) {
-		NL_SET_ERR_MSG_ATTR(extack, data[IFLA_NETKIT_SCRUB],
-				    "netkit scrubbing cannot be changed after device creation");
-		return -EACCES;
-	}
-
-	if (data[IFLA_NETKIT_PEER_SCRUB]) {
-		NL_SET_ERR_MSG_ATTR(extack, data[IFLA_NETKIT_PEER_SCRUB],
-				    "netkit scrubbing cannot be changed after device creation");
-		return -EACCES;
-	}
-
-	if (data[IFLA_NETKIT_PEER_INFO]) {
-		NL_SET_ERR_MSG_ATTR(extack, data[IFLA_NETKIT_PEER_INFO],
-				    "netkit peer info cannot be changed after device creation");
-		return -EINVAL;
+	for (i = 0; i < ARRAY_SIZE(fixed_params); i++) {
+		attr = data[fixed_params[i].attr];
+		if (attr) {
+			NL_SET_ERR_MSG_ATTR_FMT(extack, attr,
+						"netkit link %s cannot be changed after device creation",
+						fixed_params[i].name);
+			return -EACCES;
+		}
 	}
 
 	if (data[IFLA_NETKIT_POLICY]) {
@@ -914,6 +926,8 @@ static size_t netkit_get_size(const struct net_device *dev)
 	       nla_total_size(sizeof(u32)) + /* IFLA_NETKIT_PEER_SCRUB */
 	       nla_total_size(sizeof(u32)) + /* IFLA_NETKIT_MODE */
 	       nla_total_size(sizeof(u8))  + /* IFLA_NETKIT_PRIMARY */
+	       nla_total_size(sizeof(u16)) + /* IFLA_NETKIT_HEADROOM */
+	       nla_total_size(sizeof(u16)) + /* IFLA_NETKIT_TAILROOM */
 	       0;
 }
 
@@ -930,6 +944,10 @@ static int netkit_fill_info(struct sk_buff *skb, const struct net_device *dev)
 		return -EMSGSIZE;
 	if (nla_put_u32(skb, IFLA_NETKIT_SCRUB, nk->scrub))
 		return -EMSGSIZE;
+	if (nla_put_u16(skb, IFLA_NETKIT_HEADROOM, dev->needed_headroom))
+		return -EMSGSIZE;
+	if (nla_put_u16(skb, IFLA_NETKIT_TAILROOM, dev->needed_tailroom))
+		return -EMSGSIZE;
 
 	if (peer) {
 		nk = netkit_priv(peer);
@@ -947,6 +965,8 @@ static const struct nla_policy netkit_policy[IFLA_NETKIT_MAX + 1] = {
 	[IFLA_NETKIT_MODE]		= NLA_POLICY_MAX(NLA_U32, NETKIT_L3),
 	[IFLA_NETKIT_POLICY]		= { .type = NLA_U32 },
 	[IFLA_NETKIT_PEER_POLICY]	= { .type = NLA_U32 },
+	[IFLA_NETKIT_HEADROOM]		= { .type = NLA_U16 },
+	[IFLA_NETKIT_TAILROOM]		= { .type = NLA_U16 },
 	[IFLA_NETKIT_SCRUB]		= NLA_POLICY_MAX(NLA_U32, NETKIT_SCRUB_DEFAULT),
 	[IFLA_NETKIT_PEER_SCRUB]	= NLA_POLICY_MAX(NLA_U32, NETKIT_SCRUB_DEFAULT),
 	[IFLA_NETKIT_PRIMARY]		= { .type = NLA_REJECT,