Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

3 files changed, 210 insertions, 0 deletions

diff --git a/tools/testing/selftests/sigaltstack/.gitignore b/tools/testing/selftests/sigaltstack/.gitignore
new file mode 100644
index 000000000..50a19a888
--- /dev/null
+++ b/tools/testing/selftests/sigaltstack/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+sas
diff --git a/tools/testing/selftests/sigaltstack/Makefile b/tools/testing/selftests/sigaltstack/Makefile
new file mode 100644
index 000000000..3e96d5d47
--- /dev/null
+++ b/tools/testing/selftests/sigaltstack/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
+CFLAGS = -Wall
+TEST_GEN_PROGS = sas
+
+include ../lib.mk
+
diff --git a/tools/testing/selftests/sigaltstack/sas.c b/tools/testing/selftests/sigaltstack/sas.c
new file mode 100644
index 000000000..c53b07075
--- /dev/null
+++ b/tools/testing/selftests/sigaltstack/sas.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Stas Sergeev <stsp@users.sourceforge.net>
+ *
+ * test sigaltstack(SS_ONSTACK | SS_AUTODISARM)
+ * If that succeeds, then swapcontext() can be used inside sighandler safely.
+ *
+ */
+
+#define _GNU_SOURCE
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <ucontext.h>
+#include <alloca.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+#include <sys/auxv.h>
+
+#include "../kselftest.h"
+
+#ifndef SS_AUTODISARM
+#define SS_AUTODISARM  (1U << 31)
+#endif
+
+#ifndef AT_MINSIGSTKSZ
+#define AT_MINSIGSTKSZ	51
+#endif
+
+static unsigned int stack_size;
+static void *sstack, *ustack;
+static ucontext_t uc, sc;
+static const char *msg = "[OK]\tStack preserved";
+static const char *msg2 = "[FAIL]\tStack corrupted";
+struct stk_data {
+	char msg[128];
+	int flag;
+};
+
+void my_usr1(int sig, siginfo_t *si, void *u)
+{
+	char *aa;
+	int err;
+	stack_t stk;
+	struct stk_data *p;
+
+#if __s390x__
+	register unsigned long sp asm("%15");
+#else
+	register unsigned long sp asm("sp");
+#endif
+
+	if (sp < (unsigned long)sstack ||
+			sp >= (unsigned long)sstack + stack_size) {
+		ksft_exit_fail_msg("SP is not on sigaltstack\n");
+	}
+	/* put some data on stack. other sighandler will try to overwrite it */
+	aa = alloca(1024);
+	assert(aa);
+	p = (struct stk_data *)(aa + 512);
+	strcpy(p->msg, msg);
+	p->flag = 1;
+	ksft_print_msg("[RUN]\tsignal USR1\n");
+	err = sigaltstack(NULL, &stk);
+	if (err) {
+		ksft_exit_fail_msg("sigaltstack() - %s\n", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (stk.ss_flags != SS_DISABLE)
+		ksft_test_result_fail("tss_flags=%x, should be SS_DISABLE\n",
+				stk.ss_flags);
+	else
+		ksft_test_result_pass(
+				"sigaltstack is disabled in sighandler\n");
+	swapcontext(&sc, &uc);
+	ksft_print_msg("%s\n", p->msg);
+	if (!p->flag) {
+		ksft_exit_fail_msg("[RUN]\tAborting\n");
+		exit(EXIT_FAILURE);
+	}
+}
+
+void my_usr2(int sig, siginfo_t *si, void *u)
+{
+	char *aa;
+	struct stk_data *p;
+
+	ksft_print_msg("[RUN]\tsignal USR2\n");
+	aa = alloca(1024);
+	/* dont run valgrind on this */
+	/* try to find the data stored by previous sighandler */
+	p = memmem(aa, 1024, msg, strlen(msg));
+	if (p) {
+		ksft_test_result_fail("sigaltstack re-used\n");
+		/* corrupt the data */
+		strcpy(p->msg, msg2);
+		/* tell other sighandler that his data is corrupted */
+		p->flag = 0;
+	}
+}
+
+static void switch_fn(void)
+{
+	ksft_print_msg("[RUN]\tswitched to user ctx\n");
+	raise(SIGUSR2);
+	setcontext(&sc);
+}
+
+int main(void)
+{
+	struct sigaction act;
+	stack_t stk;
+	int err;
+
+	/* Make sure more than the required minimum. */
+	stack_size = getauxval(AT_MINSIGSTKSZ) + SIGSTKSZ;
+	ksft_print_msg("[NOTE]\tthe stack size is %lu\n", stack_size);
+
+	ksft_print_header();
+	ksft_set_plan(3);
+
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = SA_ONSTACK | SA_SIGINFO;
+	act.sa_sigaction = my_usr1;
+	sigaction(SIGUSR1, &act, NULL);
+	act.sa_sigaction = my_usr2;
+	sigaction(SIGUSR2, &act, NULL);
+	sstack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
+		      MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
+	if (sstack == MAP_FAILED) {
+		ksft_exit_fail_msg("mmap() - %s\n", strerror(errno));
+		return EXIT_FAILURE;
+	}
+
+	err = sigaltstack(NULL, &stk);
+	if (err) {
+		ksft_exit_fail_msg("sigaltstack() - %s\n", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (stk.ss_flags == SS_DISABLE) {
+		ksft_test_result_pass(
+				"Initial sigaltstack state was SS_DISABLE\n");
+	} else {
+		ksft_exit_fail_msg("Initial sigaltstack state was %x; "
+		       "should have been SS_DISABLE\n", stk.ss_flags);
+		return EXIT_FAILURE;
+	}
+
+	stk.ss_sp = sstack;
+	stk.ss_size = stack_size;
+	stk.ss_flags = SS_ONSTACK | SS_AUTODISARM;
+	err = sigaltstack(&stk, NULL);
+	if (err) {
+		if (errno == EINVAL) {
+			ksft_test_result_skip(
+				"[NOTE]\tThe running kernel doesn't support SS_AUTODISARM\n");
+			/*
+			 * If test cases for the !SS_AUTODISARM variant were
+			 * added, we could still run them.  We don't have any
+			 * test cases like that yet, so just exit and report
+			 * success.
+			 */
+			return 0;
+		} else {
+			ksft_exit_fail_msg(
+				"sigaltstack(SS_ONSTACK | SS_AUTODISARM)  %s\n",
+					strerror(errno));
+			return EXIT_FAILURE;
+		}
+	}
+
+	ustack = mmap(NULL, stack_size, PROT_READ | PROT_WRITE,
+		      MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
+	if (ustack == MAP_FAILED) {
+		ksft_exit_fail_msg("mmap() - %s\n", strerror(errno));
+		return EXIT_FAILURE;
+	}
+	getcontext(&uc);
+	uc.uc_link = NULL;
+	uc.uc_stack.ss_sp = ustack;
+	uc.uc_stack.ss_size = stack_size;
+	makecontext(&uc, switch_fn, 0);
+	raise(SIGUSR1);
+
+	err = sigaltstack(NULL, &stk);
+	if (err) {
+		ksft_exit_fail_msg("sigaltstack() - %s\n", strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (stk.ss_flags != SS_AUTODISARM) {
+		ksft_exit_fail_msg("ss_flags=%x, should be SS_AUTODISARM\n",
+				stk.ss_flags);
+		exit(EXIT_FAILURE);
+	}
+	ksft_test_result_pass(
+			"sigaltstack is still SS_AUTODISARM after signal\n");
+
+	ksft_exit_pass();
+	return 0;
+}