Merge tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
 "Core & protocols:

   - Improve drop account scalability on NUMA hosts for RAW and UDP
     sockets and the backlog, almost doubling the Pps capacity under DoS

   - Optimize the UDP RX performance under stress, reducing contention,
     revisiting the binary layout of the involved data structs and
     implementing NUMA-aware locking. This improves UDP RX performance
     by an additional 50%, even more under extreme conditions

   - Add support for PSP encryption of TCP connections; this mechanism
     has some similarities with IPsec and TLS, but offers superior HW
     offloads capabilities

   - Ongoing work to support Accurate ECN for TCP. AccECN allows more
     than one congestion notification signal per RTT and is a building
     block for Low Latency, Low Loss, and Scalable Throughput (L4S)

   - Reorganize the TCP socket binary layout for data locality, reducing
     the number of touched cachelines in the fastpath

   - Refactor skb deferral free to better scale on large multi-NUMA
     hosts, this improves TCP and UDP RX performances significantly on
     such HW

   - Increase the default socket memory buffer limits from 256K to 4M to
     better fit modern link speeds

   - Improve handling of setups with a large number of nexthop, making
     dump operating scaling linearly and avoiding unneeded
     synchronize_rcu() on delete

   - Improve bridge handling of VLAN FDB, storing a single entry per
     bridge instead of one entry per port; this makes the dump order of
     magnitude faster on large switches

   - Restore IP ID correctly for encapsulated packets at GSO
     segmentation time, allowing GRO to merge packets in more scenarios

   - Improve netfilter matching performance on large sets

   - Improve MPTCP receive path performance by leveraging recently
     introduced core infrastructure (skb deferral free) and adopting
     recent TCP autotuning changes

   - Allow bridges to redirect to a backup port when the bridge port is
     administratively down

   - Introduce MPTCP 'laminar' endpoint that con be used only once per
     connection and simplify common MPTCP setups

   - Add RCU safety to dst->dev, closing a lot of possible races

   - A significant crypto library API for SCTP, MPTCP and IPv6 SR,
     reducing code duplication

   - Supports pulling data from an skb frag into the linear area of an
     XDP buffer

  Things we sprinkled into general kernel code:

   - Generate netlink documentation from YAML using an integrated YAML
     parser

  Driver API:

   - Support using IPv6 Flow Label in Rx hash computation and RSS queue
     selection

   - Introduce API for fetching the DMA device for a given queue,
     allowing TCP zerocopy RX on more H/W setups

   - Make XDP helpers compatible with unreadable memory, allowing more
     easily building DevMem-enabled drivers with a unified XDP/skbs
     datapath

   - Add a new dedicated ethtool callback enabling drivers to provide
     the number of RX rings directly, improving efficiency and clarity
     in RX ring queries and RSS configuration

   - Introduce a burst period for the health reporter, allowing better
     handling of multiple errors due to the same root cause

   - Support for DPLL phase offset exponential moving average,
     controlling the average smoothing factor

  Device drivers:

   - Add a new Huawei driver for 3rd gen NIC (hinic3)

   - Add a new SpacemiT driver for K1 ethernet MAC

   - Add a generic abstraction for shared memory communication
     devices (dibps)

   - Ethernet high-speed NICs:
      - nVidia/Mellanox:
         - Use multiple per-queue doorbell, to avoid MMIO contention
           issues
         - support adjacent functions, allowing them to delegate their
           SR-IOV VFs to sibling PFs
         - support RSS for IPSec offload
         - support exposing raw cycle counters in PTP and mlx5
         - support for disabling host PFs.
      - Intel (100G, ice, idpf):
         - ice: support for SRIOV VFs over an Active-Active link
           aggregate
         - ice: support for firmware logging via debugfs
         - ice: support for Earliest TxTime First (ETF) hardware offload
         - idpf: support basic XDP functionalities and XSk
      - Broadcom (bnxt):
         - support Hyper-V VF ID
         - dynamic SRIOV resource allocations for RoCE
      - Meta (fbnic):
         - support queue API, zero-copy Rx and Tx
         - support basic XDP functionalities
         - devlink health support for FW crashes and OTP mem corruptions
         - expand hardware stats coverage to FEC, PHY, and Pause
      - Wangxun:
         - support ethtool coalesce options
         - support for multiple RSS contexts

   - Ethernet virtual:
      - Macsec:
         - replace custom netlink attribute checks with policy-level
           checks
      - Bonding:
         - support aggregator selection based on port priority
      - Microsoft vNIC:
         - use page pool fragments for RX buffers instead of full pages
           to improve memory efficiency

   - Ethernet NICs consumer, and embedded:
      - Qualcomm: support Ethernet function for IPQ9574 SoC
      - Airoha: implement wlan offloading via NPU
      - Freescale
         - enetc: add NETC timer PTP driver and add PTP support
         - fec: enable the Jumbo frame support for i.MX8QM
      - Renesas (R-Car S4):
         - support HW offloading for layer 2 switching
         - support for RZ/{T2H, N2H} SoCs
      - Cadence (macb): support TAPRIO traffic scheduling
      - TI:
         - support for Gigabit ICSS ethernet SoC (icssm-prueth)
      - Synopsys (stmmac): a lot of cleanups

   - Ethernet PHYs:
      - Support 10g-qxgmi phy-mode for AQR412C, Felix DSA and Lynx PCS
        driver
      - Support bcm63268 GPHY power control
      - Support for Micrel lan8842 PHY and PTP
      - Support for Aquantia AQR412 and AQR115

   - CAN:
      - a large CAN-XL preparation work
      - reorganize raw_sock and uniqframe struct to minimize memory
        usage
      - rcar_canfd: update the CAN-FD handling

   - WiFi:
      - extended Neighbor Awareness Networking (NAN) support
      - S1G channel representation cleanup
      - improve S1G support

   - WiFi drivers:
      - Intel (iwlwifi):
         - major refactor and cleanup
      - Broadcom (brcm80211):
         - support for AP isolation
      - RealTek (rtw88/89) rtw88/89:
         - preparation work for RTL8922DE support
      - MediaTek (mt76):
         - HW restart improvements
         - MLO support
      - Qualcomm/Atheros (ath10k):
         - GTK rekey fixes

   - Bluetooth drivers:
      - btusb: support for several new IDs for MT7925
      - btintel: support for BlazarIW core
      - btintel_pcie: support for _suspend() / _resume()
      - btintel_pcie: support for Scorpious, Panther Lake-H484 IDs"

* tag 'net-next-6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1536 commits)
  net: stmmac: Add support for Allwinner A523 GMAC200
  dt-bindings: net: sun8i-emac: Add A523 GMAC200 compatible
  Revert "Documentation: net: add flow control guide and document ethtool API"
  octeontx2-pf: fix bitmap leak
  octeontx2-vf: fix bitmap leak
  net/mlx5e: Use extack in set rxfh callback
  net/mlx5e: Introduce mlx5e_rss_params for RSS configuration
  net/mlx5e: Introduce mlx5e_rss_init_params
  net/mlx5e: Remove unused mdev param from RSS indir init
  net/mlx5: Improve QoS error messages with actual depth values
  net/mlx5e: Prevent entering switchdev mode with inconsistent netns
  net/mlx5: HWS, Generalize complex matchers
  net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
  selftests/net: add tcp_port_share to .gitignore
  Revert "net/mlx5e: Update and set Xon/Xoff upon MTU set"
  net: add NUMA awareness to skb_attempt_defer_free()
  net: use llist for sd->defer_list
  net: make softnet_data.defer_count an atomic
  selftests: drv-net: psp: add tests for destroying devices
  selftests: drv-net: psp: add test for auto-adjusting TCP MSS
  ...

4 files changed, 10 insertions, 13 deletions

diff --git a/net/tipc/addr.c b/net/tipc/addr.c
index fd0796269eed..6f5c54cbf8d9 100644
--- a/net/tipc/addr.c
+++ b/net/tipc/addr.c
@@ -79,7 +79,7 @@ void tipc_set_node_addr(struct net *net, u32 addr)
 	pr_info("Node number set to %u\n", addr);
 }
 
-char *tipc_nodeid2string(char *str, u8 *id)
+int tipc_nodeid2string(char *str, u8 *id)
 {
 	int i;
 	u8 c;
@@ -109,7 +109,7 @@ char *tipc_nodeid2string(char *str, u8 *id)
 	if (i == NODE_ID_LEN) {
 		memcpy(str, id, NODE_ID_LEN);
 		str[NODE_ID_LEN] = 0;
-		return str;
+		return i;
 	}
 
 	/* Translate to hex string */
@@ -120,5 +120,5 @@ char *tipc_nodeid2string(char *str, u8 *id)
 	for (i = NODE_ID_STR_LEN - 2; str[i] == '0'; i--)
 		str[i] = 0;
 
-	return str;
+	return i + 1;
 }
diff --git a/net/tipc/addr.h b/net/tipc/addr.h
index 93f82398283d..a113cf7e1f89 100644
--- a/net/tipc/addr.h
+++ b/net/tipc/addr.h
@@ -130,6 +130,6 @@ static inline int in_own_node(struct net *net, u32 addr)
 bool tipc_in_scope(bool legacy_format, u32 domain, u32 addr);
 void tipc_set_node_id(struct net *net, u8 *id);
 void tipc_set_node_addr(struct net *net, u32 addr);
-char *tipc_nodeid2string(char *str, u8 *id);
+int tipc_nodeid2string(char *str, u8 *id);
 
 #endif
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 3ee44d731700..931f55f781a1 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -495,11 +495,9 @@ bool tipc_link_create(struct net *net, char *if_name, int bearer_id,
 
 	/* Set link name for unicast links only */
 	if (peer_id) {
-		tipc_nodeid2string(self_str, tipc_own_id(net));
-		if (strlen(self_str) > 16)
+		if (tipc_nodeid2string(self_str, tipc_own_id(net)) > NODE_ID_LEN)
 			sprintf(self_str, "%x", self);
-		tipc_nodeid2string(peer_str, peer_id);
-		if (strlen(peer_str) > 16)
+		if (tipc_nodeid2string(peer_str, peer_id) > NODE_ID_LEN)
 			sprintf(peer_str, "%x", peer);
 	}
 	/* Peer i/f name will be completed by reset/activate message */
@@ -570,8 +568,7 @@ bool tipc_link_bc_create(struct net *net, u32 ownnode, u32 peer, u8 *peer_id,
 	if (peer_id) {
 		char peer_str[NODE_ID_STR_LEN] = {0,};
 
-		tipc_nodeid2string(peer_str, peer_id);
-		if (strlen(peer_str) > 16)
+		if (tipc_nodeid2string(peer_str, peer_id) > NODE_ID_LEN)
 			sprintf(peer_str, "%x", peer);
 		/* Broadcast receiver link name: "broadcast-link:<peer>" */
 		snprintf(l->name, sizeof(l->name), "%s:%s", tipc_bclink_name,
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index e028bf658499..1574a83384f8 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2366,7 +2366,7 @@ static void tipc_sk_filter_rcv(struct sock *sk, struct sk_buff *skb,
 		else if (sk_rmem_alloc_get(sk) + skb->truesize >= limit) {
 			trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL,
 					   "err_overload2!");
-			atomic_inc(&sk->sk_drops);
+			sk_drops_inc(sk);
 			err = TIPC_ERR_OVERLOAD;
 		}
 
@@ -2458,7 +2458,7 @@ static void tipc_sk_enqueue(struct sk_buff_head *inputq, struct sock *sk,
 		trace_tipc_sk_dump(sk, skb, TIPC_DUMP_ALL, "err_overload!");
 		/* Overload => reject message back to sender */
 		onode = tipc_own_addr(sock_net(sk));
-		atomic_inc(&sk->sk_drops);
+		sk_drops_inc(sk);
 		if (tipc_msg_reverse(onode, &skb, TIPC_ERR_OVERLOAD)) {
 			trace_tipc_sk_rej_msg(sk, skb, TIPC_DUMP_ALL,
 					      "@sk_enqueue!");
@@ -3657,7 +3657,7 @@ int tipc_sk_fill_sock_diag(struct sk_buff *skb, struct netlink_callback *cb,
 	    nla_put_u32(skb, TIPC_NLA_SOCK_STAT_SENDQ,
 			skb_queue_len(&sk->sk_write_queue)) ||
 	    nla_put_u32(skb, TIPC_NLA_SOCK_STAT_DROP,
-			atomic_read(&sk->sk_drops)))
+			sk_drops_read(sk)))
 		goto stat_msg_cancel;
 
 	if (tsk->cong_link_cnt &&