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
  ...

1 files changed, 40 insertions, 49 deletions

diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 84d3d556ed80..b1fcf3e4e1ce 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -65,6 +65,7 @@
 #include <net/icmp.h>
 #include <net/inet_hashtables.h>
 #include <net/tcp.h>
+#include <net/tcp_ecn.h>
 #include <net/transp_v6.h>
 #include <net/ipv6.h>
 #include <net/inet_common.h>
@@ -74,6 +75,7 @@
 #include <net/secure_seq.h>
 #include <net/busy_poll.h>
 #include <net/rstreason.h>
+#include <net/psp.h>
 
 #include <linux/inet.h>
 #include <linux/ipv6.h>
@@ -292,9 +294,9 @@ int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	inet->inet_dport = usin->sin_port;
 	sk_daddr_set(sk, daddr);
 
-	inet_csk(sk)->icsk_ext_hdr_len = 0;
+	inet_csk(sk)->icsk_ext_hdr_len = psp_sk_overhead(sk);
 	if (inet_opt)
-		inet_csk(sk)->icsk_ext_hdr_len = inet_opt->opt.optlen;
+		inet_csk(sk)->icsk_ext_hdr_len += inet_opt->opt.optlen;
 
 	tp->rx_opt.mss_clamp = TCP_MSS_DEFAULT;
 
@@ -506,8 +508,7 @@ int tcp_v4_err(struct sk_buff *skb, u32 info)
 	struct sock *sk;
 	int err;
 
-	sk = __inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
-				       iph->daddr, th->dest, iph->saddr,
+	sk = __inet_lookup_established(net, iph->daddr, th->dest, iph->saddr,
 				       ntohs(th->source), inet_iif(skb), 0);
 	if (!sk) {
 		__ICMP_INC_STATS(net, ICMP_MIB_INERRORS);
@@ -823,8 +824,7 @@ static void tcp_v4_send_reset(const struct sock *sk, struct sk_buff *skb,
 		 * Incoming packet is checked with md5 hash with finding key,
 		 * no RST generated if md5 hash doesn't match.
 		 */
-		sk1 = __inet_lookup_listener(net, net->ipv4.tcp_death_row.hashinfo,
-					     NULL, 0, ip_hdr(skb)->saddr,
+		sk1 = __inet_lookup_listener(net, NULL, 0, ip_hdr(skb)->saddr,
 					     th->source, ip_hdr(skb)->daddr,
 					     ntohs(th->source), dif, sdif);
 		/* don't send rst if it can't find key */
@@ -1191,7 +1191,7 @@ static int tcp_v4_send_synack(const struct sock *sk, struct dst_entry *dst,
 			      enum tcp_synack_type synack_type,
 			      struct sk_buff *syn_skb)
 {
-	const struct inet_request_sock *ireq = inet_rsk(req);
+	struct inet_request_sock *ireq = inet_rsk(req);
 	struct flowi4 fl4;
 	int err = -1;
 	struct sk_buff *skb;
@@ -1204,6 +1204,7 @@ static int tcp_v4_send_synack(const struct sock *sk, struct dst_entry *dst,
 	skb = tcp_make_synack(sk, dst, req, foc, synack_type, syn_skb);
 
 	if (skb) {
+		tcp_rsk(req)->syn_ect_snt = inet_sk(sk)->tos & INET_ECN_MASK;
 		__tcp_v4_send_check(skb, ireq->ir_loc_addr, ireq->ir_rmt_addr);
 
 		tos = READ_ONCE(inet_sk(sk)->tos);
@@ -1505,9 +1506,9 @@ void tcp_clear_md5_list(struct sock *sk)
 	md5sig = rcu_dereference_protected(tp->md5sig_info, 1);
 
 	hlist_for_each_entry_safe(key, n, &md5sig->head, node) {
-		hlist_del_rcu(&key->node);
+		hlist_del(&key->node);
 		atomic_sub(sizeof(*key), &sk->sk_omem_alloc);
-		kfree_rcu(key, rcu);
+		kfree(key);
 	}
 }
 
@@ -1907,6 +1908,10 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 	enum skb_drop_reason reason;
 	struct sock *rsk;
 
+	reason = psp_sk_rx_policy_check(sk, skb);
+	if (reason)
+		goto err_discard;
+
 	if (sk->sk_state == TCP_ESTABLISHED) { /* Fast path */
 		struct dst_entry *dst;
 
@@ -1968,6 +1973,7 @@ csum_err:
 	reason = SKB_DROP_REASON_TCP_CSUM;
 	trace_tcp_bad_csum(skb);
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_CSUMERRORS);
+err_discard:
 	TCP_INC_STATS(sock_net(sk), TCP_MIB_INERRS);
 	goto discard;
 }
@@ -1992,8 +1998,7 @@ int tcp_v4_early_demux(struct sk_buff *skb)
 	if (th->doff < sizeof(struct tcphdr) / 4)
 		return 0;
 
-	sk = __inet_lookup_established(net, net->ipv4.tcp_death_row.hashinfo,
-				       iph->saddr, th->source,
+	sk = __inet_lookup_established(net, iph->saddr, th->source,
 				       iph->daddr, ntohs(th->dest),
 				       skb->skb_iif, inet_sdif(skb));
 	if (sk) {
@@ -2070,7 +2075,9 @@ bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb,
 	     (TCPHDR_ECE | TCPHDR_CWR | TCPHDR_AE)) ||
 	    !tcp_skb_can_collapse_rx(tail, skb) ||
 	    thtail->doff != th->doff ||
-	    memcmp(thtail + 1, th + 1, hdrlen - sizeof(*th)))
+	    memcmp(thtail + 1, th + 1, hdrlen - sizeof(*th)) ||
+	    /* prior to PSP Rx policy check, retain exact PSP metadata */
+	    psp_skb_coalesce_diff(tail, skb))
 		goto no_coalesce;
 
 	__skb_pull(skb, hdrlen);
@@ -2236,8 +2243,7 @@ int tcp_v4_rcv(struct sk_buff *skb)
 	th = (const struct tcphdr *)skb->data;
 	iph = ip_hdr(skb);
 lookup:
-	sk = __inet_lookup_skb(net->ipv4.tcp_death_row.hashinfo,
-			       skb, __tcp_hdrlen(th), th->source,
+	sk = __inet_lookup_skb(skb, __tcp_hdrlen(th), th->source,
 			       th->dest, sdif, &refcounted);
 	if (!sk)
 		goto no_tcp_socket;
@@ -2258,7 +2264,7 @@ lookup:
 						       &iph->saddr, &iph->daddr,
 						       AF_INET, dif, sdif);
 		if (unlikely(drop_reason)) {
-			sk_drops_add(sk, skb);
+			sk_drops_skbadd(sk, skb);
 			reqsk_put(req);
 			goto discard_it;
 		}
@@ -2403,7 +2409,7 @@ discard_it:
 	return 0;
 
 discard_and_relse:
-	sk_drops_add(sk, skb);
+	sk_drops_skbadd(sk, skb);
 	if (refcounted)
 		sock_put(sk);
 	goto discard_it;
@@ -2426,9 +2432,7 @@ do_time_wait:
 					       &drop_reason);
 	switch (tw_status) {
 	case TCP_TW_SYN: {
-		struct sock *sk2 = inet_lookup_listener(net,
-							net->ipv4.tcp_death_row.hashinfo,
-							skb, __tcp_hdrlen(th),
+		struct sock *sk2 = inet_lookup_listener(net, skb, __tcp_hdrlen(th),
 							iph->saddr, th->source,
 							iph->daddr, th->dest,
 							inet_iif(skb),
@@ -2441,6 +2445,10 @@ do_time_wait:
 			__this_cpu_write(tcp_tw_isn, isn);
 			goto process;
 		}
+
+		drop_reason = psp_twsk_rx_policy_check(inet_twsk(sk), skb);
+		if (drop_reason)
+			break;
 	}
 		/* to ACK */
 		fallthrough;
@@ -2459,7 +2467,6 @@ do_time_wait:
 
 static struct timewait_sock_ops tcp_timewait_sock_ops = {
 	.twsk_obj_size	= sizeof(struct tcp_timewait_sock),
-	.twsk_destructor= tcp_twsk_destructor,
 };
 
 void inet_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb)
@@ -2501,6 +2508,13 @@ static const struct tcp_sock_af_ops tcp_sock_ipv4_specific = {
 	.ao_calc_key_sk		= tcp_v4_ao_calc_key_sk,
 #endif
 };
+
+static void tcp4_destruct_sock(struct sock *sk)
+{
+	tcp_md5_destruct_sock(sk);
+	tcp_ao_destroy_sock(sk, false);
+	inet_sock_destruct(sk);
+}
 #endif
 
 /* NOTE: A lot of things set to zero explicitly by call to
@@ -2516,23 +2530,12 @@ static int tcp_v4_init_sock(struct sock *sk)
 
 #if defined(CONFIG_TCP_MD5SIG) || defined(CONFIG_TCP_AO)
 	tcp_sk(sk)->af_specific = &tcp_sock_ipv4_specific;
+	sk->sk_destruct = tcp4_destruct_sock;
 #endif
 
 	return 0;
 }
 
-#ifdef CONFIG_TCP_MD5SIG
-static void tcp_md5sig_info_free_rcu(struct rcu_head *head)
-{
-	struct tcp_md5sig_info *md5sig;
-
-	md5sig = container_of(head, struct tcp_md5sig_info, rcu);
-	kfree(md5sig);
-	static_branch_slow_dec_deferred(&tcp_md5_needed);
-	tcp_md5_release_sigpool();
-}
-#endif
-
 static void tcp_release_user_frags(struct sock *sk)
 {
 #ifdef CONFIG_PAGE_POOL
@@ -2569,19 +2572,6 @@ void tcp_v4_destroy_sock(struct sock *sk)
 	/* Cleans up our, hopefully empty, out_of_order_queue. */
 	skb_rbtree_purge(&tp->out_of_order_queue);
 
-#ifdef CONFIG_TCP_MD5SIG
-	/* Clean up the MD5 key list, if any */
-	if (tp->md5sig_info) {
-		struct tcp_md5sig_info *md5sig;
-
-		md5sig = rcu_dereference_protected(tp->md5sig_info, 1);
-		tcp_clear_md5_list(sk);
-		call_rcu(&md5sig->rcu, tcp_md5sig_info_free_rcu);
-		rcu_assign_pointer(tp->md5sig_info, NULL);
-	}
-#endif
-	tcp_ao_destroy_sock(sk, false);
-
 	/* Clean up a referenced TCP bind bucket. */
 	if (inet_csk(sk)->icsk_bind_hash)
 		inet_put_port(sk);
@@ -2958,9 +2948,9 @@ static void get_tcp4_sock(struct sock *sk, struct seq_file *f, int i)
 		rx_queue,
 		timer_active,
 		jiffies_delta_to_clock_t(timer_expires - jiffies),
-		icsk->icsk_retransmits,
+		READ_ONCE(icsk->icsk_retransmits),
 		from_kuid_munged(seq_user_ns(f), sk_uid(sk)),
-		icsk->icsk_probes_out,
+		READ_ONCE(icsk->icsk_probes_out),
 		sock_i_ino(sk),
 		refcount_read(&sk->sk_refcnt), sk,
 		jiffies_to_clock_t(icsk->icsk_rto),
@@ -3524,7 +3514,6 @@ struct proto tcp_prot = {
 	.leave_memory_pressure	= tcp_leave_memory_pressure,
 	.stream_memory_free	= tcp_stream_memory_free,
 	.sockets_allocated	= &tcp_sockets_allocated,
-	.orphan_count		= &tcp_orphan_count,
 
 	.memory_allocated	= &net_aligned_data.tcp_memory_allocated,
 	.per_cpu_fw_alloc	= &tcp_memory_per_cpu_fw_alloc,
@@ -3583,7 +3572,9 @@ fallback:
 
 static int __net_init tcp_sk_init(struct net *net)
 {
-	net->ipv4.sysctl_tcp_ecn = 2;
+	net->ipv4.sysctl_tcp_ecn = TCP_ECN_IN_ECN_OUT_NOECN;
+	net->ipv4.sysctl_tcp_ecn_option = TCP_ACCECN_OPTION_FULL;
+	net->ipv4.sysctl_tcp_ecn_option_beacon = TCP_ACCECN_OPTION_BEACON;
 	net->ipv4.sysctl_tcp_ecn_fallback = 1;
 
 	net->ipv4.sysctl_tcp_base_mss = TCP_BASE_MSS;