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

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().
  ...

1 files changed, 36 insertions, 641 deletions

diff --git a/tools/testing/selftests/bpf/xsk.c b/tools/testing/selftests/bpf/xsk.c
index 39d349509ba4..687d83e707f8 100644
--- a/tools/testing/selftests/bpf/xsk.c
+++ b/tools/testing/selftests/bpf/xsk.c
@@ -49,10 +49,7 @@
 
 #define pr_warn(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__)
 
-enum xsk_prog {
-	XSK_PROG_FALLBACK,
-	XSK_PROG_REDIRECT_FLAGS,
-};
+#define XSKMAP_SIZE 1
 
 struct xsk_umem {
 	struct xsk_ring_prod *fill_save;
@@ -74,43 +71,16 @@ struct xsk_ctx {
 	int refcount;
 	int ifindex;
 	struct list_head list;
-	int prog_fd;
-	int link_fd;
-	int xsks_map_fd;
-	char ifname[IFNAMSIZ];
-	bool has_bpf_link;
 };
 
 struct xsk_socket {
 	struct xsk_ring_cons *rx;
 	struct xsk_ring_prod *tx;
-	__u64 outstanding_tx;
 	struct xsk_ctx *ctx;
 	struct xsk_socket_config config;
 	int fd;
 };
 
-struct xsk_nl_info {
-	bool xdp_prog_attached;
-	int ifindex;
-	int fd;
-};
-
-/* Up until and including Linux 5.3 */
-struct xdp_ring_offset_v1 {
-	__u64 producer;
-	__u64 consumer;
-	__u64 desc;
-};
-
-/* Up until and including Linux 5.3 */
-struct xdp_mmap_offsets_v1 {
-	struct xdp_ring_offset_v1 rx;
-	struct xdp_ring_offset_v1 tx;
-	struct xdp_ring_offset_v1 fr;
-	struct xdp_ring_offset_v1 cr;
-};
-
 int xsk_umem__fd(const struct xsk_umem *umem)
 {
 	return umem ? umem->fd : -EINVAL;
@@ -153,55 +123,17 @@ static int xsk_set_xdp_socket_config(struct xsk_socket_config *cfg,
 	if (!usr_cfg) {
 		cfg->rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
 		cfg->tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
-		cfg->libbpf_flags = 0;
-		cfg->xdp_flags = 0;
 		cfg->bind_flags = 0;
 		return 0;
 	}
 
-	if (usr_cfg->libbpf_flags & ~XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD)
-		return -EINVAL;
-
 	cfg->rx_size = usr_cfg->rx_size;
 	cfg->tx_size = usr_cfg->tx_size;
-	cfg->libbpf_flags = usr_cfg->libbpf_flags;
-	cfg->xdp_flags = usr_cfg->xdp_flags;
 	cfg->bind_flags = usr_cfg->bind_flags;
 
 	return 0;
 }
 
-static void xsk_mmap_offsets_v1(struct xdp_mmap_offsets *off)
-{
-	struct xdp_mmap_offsets_v1 off_v1;
-
-	/* getsockopt on a kernel <= 5.3 has no flags fields.
-	 * Copy over the offsets to the correct places in the >=5.4 format
-	 * and put the flags where they would have been on that kernel.
-	 */
-	memcpy(&off_v1, off, sizeof(off_v1));
-
-	off->rx.producer = off_v1.rx.producer;
-	off->rx.consumer = off_v1.rx.consumer;
-	off->rx.desc = off_v1.rx.desc;
-	off->rx.flags = off_v1.rx.consumer + sizeof(__u32);
-
-	off->tx.producer = off_v1.tx.producer;
-	off->tx.consumer = off_v1.tx.consumer;
-	off->tx.desc = off_v1.tx.desc;
-	off->tx.flags = off_v1.tx.consumer + sizeof(__u32);
-
-	off->fr.producer = off_v1.fr.producer;
-	off->fr.consumer = off_v1.fr.consumer;
-	off->fr.desc = off_v1.fr.desc;
-	off->fr.flags = off_v1.fr.consumer + sizeof(__u32);
-
-	off->cr.producer = off_v1.cr.producer;
-	off->cr.consumer = off_v1.cr.consumer;
-	off->cr.desc = off_v1.cr.desc;
-	off->cr.flags = off_v1.cr.consumer + sizeof(__u32);
-}
-
 static int xsk_get_mmap_offsets(int fd, struct xdp_mmap_offsets *off)
 {
 	socklen_t optlen;
@@ -215,11 +147,6 @@ static int xsk_get_mmap_offsets(int fd, struct xdp_mmap_offsets *off)
 	if (optlen == sizeof(*off))
 		return 0;
 
-	if (optlen == sizeof(struct xdp_mmap_offsets_v1)) {
-		xsk_mmap_offsets_v1(off);
-		return 0;
-	}
-
 	return -EINVAL;
 }
 
@@ -340,531 +267,56 @@ out_umem_alloc:
 	return err;
 }
 
-struct xsk_umem_config_v1 {
-	__u32 fill_size;
-	__u32 comp_size;
-	__u32 frame_size;
-	__u32 frame_headroom;
-};
-
-static enum xsk_prog get_xsk_prog(void)
-{
-	enum xsk_prog detected = XSK_PROG_FALLBACK;
-	char data_in = 0, data_out;
-	struct bpf_insn insns[] = {
-		BPF_LD_MAP_FD(BPF_REG_1, 0),
-		BPF_MOV64_IMM(BPF_REG_2, 0),
-		BPF_MOV64_IMM(BPF_REG_3, XDP_PASS),
-		BPF_EMIT_CALL(BPF_FUNC_redirect_map),
-		BPF_EXIT_INSN(),
-	};
-	LIBBPF_OPTS(bpf_test_run_opts, opts,
-		.data_in = &data_in,
-		.data_size_in = 1,
-		.data_out = &data_out,
-	);
-
-	int prog_fd, map_fd, ret, insn_cnt = ARRAY_SIZE(insns);
-
-	map_fd = bpf_map_create(BPF_MAP_TYPE_XSKMAP, NULL, sizeof(int), sizeof(int), 1, NULL);
-	if (map_fd < 0)
-		return detected;
-
-	insns[0].imm = map_fd;
-
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_XDP, NULL, "GPL", insns, insn_cnt, NULL);
-	if (prog_fd < 0) {
-		close(map_fd);
-		return detected;
-	}
-
-	ret = bpf_prog_test_run_opts(prog_fd, &opts);
-	if (!ret && opts.retval == XDP_PASS)
-		detected = XSK_PROG_REDIRECT_FLAGS;
-	close(prog_fd);
-	close(map_fd);
-	return detected;
-}
-
-static int xsk_load_xdp_prog(struct xsk_socket *xsk)
-{
-	static const int log_buf_size = 16 * 1024;
-	struct xsk_ctx *ctx = xsk->ctx;
-	char log_buf[log_buf_size];
-	int prog_fd;
-
-	/* This is the fallback C-program:
-	 * SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx)
-	 * {
-	 *     int ret, index = ctx->rx_queue_index;
-	 *
-	 *     // A set entry here means that the correspnding queue_id
-	 *     // has an active AF_XDP socket bound to it.
-	 *     ret = bpf_redirect_map(&xsks_map, index, XDP_PASS);
-	 *     if (ret > 0)
-	 *         return ret;
-	 *
-	 *     // Fallback for pre-5.3 kernels, not supporting default
-	 *     // action in the flags parameter.
-	 *     if (bpf_map_lookup_elem(&xsks_map, &index))
-	 *         return bpf_redirect_map(&xsks_map, index, 0);
-	 *     return XDP_PASS;
-	 * }
-	 */
-	struct bpf_insn prog[] = {
-		/* r2 = *(u32 *)(r1 + 16) */
-		BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 16),
-		/* *(u32 *)(r10 - 4) = r2 */
-		BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_2, -4),
-		/* r1 = xskmap[] */
-		BPF_LD_MAP_FD(BPF_REG_1, ctx->xsks_map_fd),
-		/* r3 = XDP_PASS */
-		BPF_MOV64_IMM(BPF_REG_3, 2),
-		/* call bpf_redirect_map */
-		BPF_EMIT_CALL(BPF_FUNC_redirect_map),
-		/* if w0 != 0 goto pc+13 */
-		BPF_JMP32_IMM(BPF_JSGT, BPF_REG_0, 0, 13),
-		/* r2 = r10 */
-		BPF_MOV64_REG(BPF_REG_2, BPF_REG_10),
-		/* r2 += -4 */
-		BPF_ALU64_IMM(BPF_ADD, BPF_REG_2, -4),
-		/* r1 = xskmap[] */
-		BPF_LD_MAP_FD(BPF_REG_1, ctx->xsks_map_fd),
-		/* call bpf_map_lookup_elem */
-		BPF_EMIT_CALL(BPF_FUNC_map_lookup_elem),
-		/* r1 = r0 */
-		BPF_MOV64_REG(BPF_REG_1, BPF_REG_0),
-		/* r0 = XDP_PASS */
-		BPF_MOV64_IMM(BPF_REG_0, 2),
-		/* if r1 == 0 goto pc+5 */
-		BPF_JMP_IMM(BPF_JEQ, BPF_REG_1, 0, 5),
-		/* r2 = *(u32 *)(r10 - 4) */
-		BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_10, -4),
-		/* r1 = xskmap[] */
-		BPF_LD_MAP_FD(BPF_REG_1, ctx->xsks_map_fd),
-		/* r3 = 0 */
-		BPF_MOV64_IMM(BPF_REG_3, 0),
-		/* call bpf_redirect_map */
-		BPF_EMIT_CALL(BPF_FUNC_redirect_map),
-		/* The jumps are to this instruction */
-		BPF_EXIT_INSN(),
-	};
-
-	/* This is the post-5.3 kernel C-program:
-	 * SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx)
-	 * {
-	 *     return bpf_redirect_map(&xsks_map, ctx->rx_queue_index, XDP_PASS);
-	 * }
-	 */
-	struct bpf_insn prog_redirect_flags[] = {
-		/* r2 = *(u32 *)(r1 + 16) */
-		BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 16),
-		/* r1 = xskmap[] */
-		BPF_LD_MAP_FD(BPF_REG_1, ctx->xsks_map_fd),
-		/* r3 = XDP_PASS */
-		BPF_MOV64_IMM(BPF_REG_3, 2),
-		/* call bpf_redirect_map */
-		BPF_EMIT_CALL(BPF_FUNC_redirect_map),
-		BPF_EXIT_INSN(),
-	};
-	size_t insns_cnt[] = {ARRAY_SIZE(prog),
-			      ARRAY_SIZE(prog_redirect_flags),
-	};
-	struct bpf_insn *progs[] = {prog, prog_redirect_flags};
-	enum xsk_prog option = get_xsk_prog();
-	LIBBPF_OPTS(bpf_prog_load_opts, opts,
-		.log_buf = log_buf,
-		.log_size = log_buf_size,
-	);
-
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_XDP, NULL, "LGPL-2.1 or BSD-2-Clause",
-				progs[option], insns_cnt[option], &opts);
-	if (prog_fd < 0) {
-		pr_warn("BPF log buffer:\n%s", log_buf);
-		return prog_fd;
-	}
-
-	ctx->prog_fd = prog_fd;
-	return 0;
-}
-
-static int xsk_create_bpf_link(struct xsk_socket *xsk)
-{
-	DECLARE_LIBBPF_OPTS(bpf_link_create_opts, opts);
-	struct xsk_ctx *ctx = xsk->ctx;
-	__u32 prog_id = 0;
-	int link_fd;
-	int err;
-
-	err = bpf_xdp_query_id(ctx->ifindex, xsk->config.xdp_flags, &prog_id);
-	if (err) {
-		pr_warn("getting XDP prog id failed\n");
-		return err;
-	}
-
-	/* if there's a netlink-based XDP prog loaded on interface, bail out
-	 * and ask user to do the removal by himself
-	 */
-	if (prog_id) {
-		pr_warn("Netlink-based XDP prog detected, please unload it in order to launch AF_XDP prog\n");
-		return -EINVAL;
-	}
-
-	opts.flags = xsk->config.xdp_flags & ~(XDP_FLAGS_UPDATE_IF_NOEXIST | XDP_FLAGS_REPLACE);
-
-	link_fd = bpf_link_create(ctx->prog_fd, ctx->ifindex, BPF_XDP, &opts);
-	if (link_fd < 0) {
-		pr_warn("bpf_link_create failed: %s\n", strerror(errno));
-		return link_fd;
-	}
-
-	ctx->link_fd = link_fd;
-	return 0;
-}
-
-static int xsk_get_max_queues(struct xsk_socket *xsk)
-{
-	struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
-	struct xsk_ctx *ctx = xsk->ctx;
-	struct ifreq ifr = {};
-	int fd, err, ret;
-
-	fd = socket(AF_LOCAL, SOCK_DGRAM | SOCK_CLOEXEC, 0);
-	if (fd < 0)
-		return -errno;
-
-	ifr.ifr_data = (void *)&channels;
-	bpf_strlcpy(ifr.ifr_name, ctx->ifname, IFNAMSIZ);
-	err = ioctl(fd, SIOCETHTOOL, &ifr);
-	if (err && errno != EOPNOTSUPP) {
-		ret = -errno;
-		goto out;
-	}
-
-	if (err) {
-		/* If the device says it has no channels, then all traffic
-		 * is sent to a single stream, so max queues = 1.
-		 */
-		ret = 1;
-	} else {
-		/* Take the max of rx, tx, combined. Drivers return
-		 * the number of channels in different ways.
-		 */
-		ret = max(channels.max_rx, channels.max_tx);
-		ret = max(ret, (int)channels.max_combined);
-	}
-
-out:
-	close(fd);
-	return ret;
-}
-
-static int xsk_create_bpf_maps(struct xsk_socket *xsk)
-{
-	struct xsk_ctx *ctx = xsk->ctx;
-	int max_queues;
-	int fd;
-
-	max_queues = xsk_get_max_queues(xsk);
-	if (max_queues < 0)
-		return max_queues;
-
-	fd = bpf_map_create(BPF_MAP_TYPE_XSKMAP, "xsks_map",
-			    sizeof(int), sizeof(int), max_queues, NULL);
-	if (fd < 0)
-		return fd;
-
-	ctx->xsks_map_fd = fd;
-
-	return 0;
-}
-
-static void xsk_delete_bpf_maps(struct xsk_socket *xsk)
-{
-	struct xsk_ctx *ctx = xsk->ctx;
-
-	bpf_map_delete_elem(ctx->xsks_map_fd, &ctx->queue_id);
-	close(ctx->xsks_map_fd);
-}
-
-static int xsk_lookup_bpf_maps(struct xsk_socket *xsk)
-{
-	__u32 i, *map_ids, num_maps, prog_len = sizeof(struct bpf_prog_info);
-	__u32 map_len = sizeof(struct bpf_map_info);
-	struct bpf_prog_info prog_info = {};
-	struct xsk_ctx *ctx = xsk->ctx;
-	struct bpf_map_info map_info;
-	int fd, err;
-
-	err = bpf_obj_get_info_by_fd(ctx->prog_fd, &prog_info, &prog_len);
-	if (err)
-		return err;
-
-	num_maps = prog_info.nr_map_ids;
-
-	map_ids = calloc(prog_info.nr_map_ids, sizeof(*map_ids));
-	if (!map_ids)
-		return -ENOMEM;
-
-	memset(&prog_info, 0, prog_len);
-	prog_info.nr_map_ids = num_maps;
-	prog_info.map_ids = (__u64)(unsigned long)map_ids;
-
-	err = bpf_obj_get_info_by_fd(ctx->prog_fd, &prog_info, &prog_len);
-	if (err)
-		goto out_map_ids;
-
-	ctx->xsks_map_fd = -1;
-
-	for (i = 0; i < prog_info.nr_map_ids; i++) {
-		fd = bpf_map_get_fd_by_id(map_ids[i]);
-		if (fd < 0)
-			continue;
-
-		memset(&map_info, 0, map_len);
-		err = bpf_obj_get_info_by_fd(fd, &map_info, &map_len);
-		if (err) {
-			close(fd);
-			continue;
-		}
-
-		if (!strncmp(map_info.name, "xsks_map", sizeof(map_info.name))) {
-			ctx->xsks_map_fd = fd;
-			break;
-		}
-
-		close(fd);
-	}
-
-	if (ctx->xsks_map_fd == -1)
-		err = -ENOENT;
-
-out_map_ids:
-	free(map_ids);
-	return err;
-}
-
-static int xsk_set_bpf_maps(struct xsk_socket *xsk)
-{
-	struct xsk_ctx *ctx = xsk->ctx;
-
-	return bpf_map_update_elem(ctx->xsks_map_fd, &ctx->queue_id,
-				   &xsk->fd, 0);
-}
-
-static int xsk_link_lookup(int ifindex, __u32 *prog_id, int *link_fd)
+bool xsk_is_in_mode(u32 ifindex, int mode)
 {
-	struct bpf_link_info link_info;
-	__u32 link_len;
-	__u32 id = 0;
-	int err;
-	int fd;
-
-	while (true) {
-		err = bpf_link_get_next_id(id, &id);
-		if (err) {
-			if (errno == ENOENT) {
-				err = 0;
-				break;
-			}
-			pr_warn("can't get next link: %s\n", strerror(errno));
-			break;
-		}
-
-		fd = bpf_link_get_fd_by_id(id);
-		if (fd < 0) {
-			if (errno == ENOENT)
-				continue;
-			pr_warn("can't get link by id (%u): %s\n", id, strerror(errno));
-			err = -errno;
-			break;
-		}
+	LIBBPF_OPTS(bpf_xdp_query_opts, opts);
+	int ret;
 
-		link_len = sizeof(struct bpf_link_info);
-		memset(&link_info, 0, link_len);
-		err = bpf_obj_get_info_by_fd(fd, &link_info, &link_len);
-		if (err) {
-			pr_warn("can't get link info: %s\n", strerror(errno));
-			close(fd);
-			break;
-		}
-		if (link_info.type == BPF_LINK_TYPE_XDP) {
-			if (link_info.xdp.ifindex == ifindex) {
-				*link_fd = fd;
-				if (prog_id)
-					*prog_id = link_info.prog_id;
-				break;
-			}
-		}
-		close(fd);
+	ret = bpf_xdp_query(ifindex, mode, &opts);
+	if (ret) {
+		printf("XDP mode query returned error %s\n", strerror(errno));
+		return false;
 	}
 
-	return err;
-}
+	if (mode == XDP_FLAGS_DRV_MODE)
+		return opts.attach_mode == XDP_ATTACHED_DRV;
+	else if (mode == XDP_FLAGS_SKB_MODE)
+		return opts.attach_mode == XDP_ATTACHED_SKB;
 
-static bool xsk_probe_bpf_link(void)
-{
-	LIBBPF_OPTS(bpf_link_create_opts, opts, .flags = XDP_FLAGS_SKB_MODE);
-	struct bpf_insn insns[2] = {
-		BPF_MOV64_IMM(BPF_REG_0, XDP_PASS),
-		BPF_EXIT_INSN()
-	};
-	int prog_fd, link_fd = -1, insn_cnt = ARRAY_SIZE(insns);
-	int ifindex_lo = 1;
-	bool ret = false;
-	int err;
-
-	err = xsk_link_lookup(ifindex_lo, NULL, &link_fd);
-	if (err)
-		return ret;
-
-	if (link_fd >= 0)
-		return true;
-
-	prog_fd = bpf_prog_load(BPF_PROG_TYPE_XDP, NULL, "GPL", insns, insn_cnt, NULL);
-	if (prog_fd < 0)
-		return ret;
-
-	link_fd = bpf_link_create(prog_fd, ifindex_lo, BPF_XDP, &opts);
-	close(prog_fd);
-
-	if (link_fd >= 0) {
-		ret = true;
-		close(link_fd);
-	}
-
-	return ret;
+	return false;
 }
 
-static int xsk_create_xsk_struct(int ifindex, struct xsk_socket *xsk)
+int xsk_attach_xdp_program(struct bpf_program *prog, int ifindex, u32 xdp_flags)
 {
-	char ifname[IFNAMSIZ];
-	struct xsk_ctx *ctx;
-	char *interface;
-
-	ctx = calloc(1, sizeof(*ctx));
-	if (!ctx)
-		return -ENOMEM;
-
-	interface = if_indextoname(ifindex, &ifname[0]);
-	if (!interface) {
-		free(ctx);
-		return -errno;
-	}
-
-	ctx->ifindex = ifindex;
-	bpf_strlcpy(ctx->ifname, ifname, IFNAMSIZ);
-
-	xsk->ctx = ctx;
-	xsk->ctx->has_bpf_link = xsk_probe_bpf_link();
+	int prog_fd;
 
-	return 0;
+	prog_fd = bpf_program__fd(prog);
+	return bpf_xdp_attach(ifindex, prog_fd, xdp_flags, NULL);
 }
 
-static int xsk_init_xdp_res(struct xsk_socket *xsk,
-			    int *xsks_map_fd)
+void xsk_detach_xdp_program(int ifindex, u32 xdp_flags)
 {
-	struct xsk_ctx *ctx = xsk->ctx;
-	int err;
-
-	err = xsk_create_bpf_maps(xsk);
-	if (err)
-		return err;
-
-	err = xsk_load_xdp_prog(xsk);
-	if (err)
-		goto err_load_xdp_prog;
-
-	if (ctx->has_bpf_link)
-		err = xsk_create_bpf_link(xsk);
-	else
-		err = bpf_xdp_attach(xsk->ctx->ifindex, ctx->prog_fd,
-				     xsk->config.xdp_flags, NULL);
-
-	if (err)
-		goto err_attach_xdp_prog;
-
-	if (!xsk->rx)
-		return err;
-
-	err = xsk_set_bpf_maps(xsk);
-	if (err)
-		goto err_set_bpf_maps;
-
-	return err;
-
-err_set_bpf_maps:
-	if (ctx->has_bpf_link)
-		close(ctx->link_fd);
-	else
-		bpf_xdp_detach(ctx->ifindex, 0, NULL);
-err_attach_xdp_prog:
-	close(ctx->prog_fd);
-err_load_xdp_prog:
-	xsk_delete_bpf_maps(xsk);
-	return err;
+	bpf_xdp_detach(ifindex, xdp_flags, NULL);
 }
 
-static int xsk_lookup_xdp_res(struct xsk_socket *xsk, int *xsks_map_fd, int prog_id)
+void xsk_clear_xskmap(struct bpf_map *map)
 {
-	struct xsk_ctx *ctx = xsk->ctx;
-	int err;
-
-	ctx->prog_fd = bpf_prog_get_fd_by_id(prog_id);
-	if (ctx->prog_fd < 0) {
-		err = -errno;
-		goto err_prog_fd;
-	}
-	err = xsk_lookup_bpf_maps(xsk);
-	if (err)
-		goto err_lookup_maps;
-
-	if (!xsk->rx)
-		return err;
-
-	err = xsk_set_bpf_maps(xsk);
-	if (err)
-		goto err_set_maps;
+	u32 index = 0;
+	int map_fd;
 
-	return err;
-
-err_set_maps:
-	close(ctx->xsks_map_fd);
-err_lookup_maps:
-	close(ctx->prog_fd);
-err_prog_fd:
-	if (ctx->has_bpf_link)
-		close(ctx->link_fd);
-	return err;
+	map_fd = bpf_map__fd(map);
+	bpf_map_delete_elem(map_fd, &index);
 }
 
-static int __xsk_setup_xdp_prog(struct xsk_socket *_xdp, int *xsks_map_fd)
+int xsk_update_xskmap(struct bpf_map *map, struct xsk_socket *xsk)
 {
-	struct xsk_socket *xsk = _xdp;
-	struct xsk_ctx *ctx = xsk->ctx;
-	__u32 prog_id = 0;
-	int err;
+	int map_fd, sock_fd;
+	u32 index = 0;
 
-	if (ctx->has_bpf_link)
-		err = xsk_link_lookup(ctx->ifindex, &prog_id, &ctx->link_fd);
-	else
-		err = bpf_xdp_query_id(ctx->ifindex, xsk->config.xdp_flags, &prog_id);
+	map_fd = bpf_map__fd(map);
+	sock_fd = xsk_socket__fd(xsk);
 
-	if (err)
-		return err;
-
-	err = !prog_id ? xsk_init_xdp_res(xsk, xsks_map_fd) :
-			 xsk_lookup_xdp_res(xsk, xsks_map_fd, prog_id);
-
-	if (!err && xsks_map_fd)
-		*xsks_map_fd = ctx->xsks_map_fd;
-
-	return err;
-}
-
-int xsk_setup_xdp_prog_xsk(struct xsk_socket *xsk, int *xsks_map_fd)
-{
-	return __xsk_setup_xdp_prog(xsk, xsks_map_fd);
+	return bpf_map_update_elem(map_fd, &index, &sock_fd, 0);
 }
 
 static struct xsk_ctx *xsk_get_ctx(struct xsk_umem *umem, int ifindex,
@@ -913,7 +365,7 @@ out_free:
 
 static struct xsk_ctx *xsk_create_ctx(struct xsk_socket *xsk,
 				      struct xsk_umem *umem, int ifindex,
-				      const char *ifname, __u32 queue_id,
+				      __u32 queue_id,
 				      struct xsk_ring_prod *fill,
 				      struct xsk_ring_cons *comp)
 {
@@ -940,51 +392,15 @@ static struct xsk_ctx *xsk_create_ctx(struct xsk_socket *xsk,
 	ctx->refcount = 1;
 	ctx->umem = umem;
 	ctx->queue_id = queue_id;
-	bpf_strlcpy(ctx->ifname, ifname, IFNAMSIZ);
 
 	ctx->fill = fill;
 	ctx->comp = comp;
 	list_add(&ctx->list, &umem->ctx_list);
-	ctx->has_bpf_link = xsk_probe_bpf_link();
 	return ctx;
 }
 
-static void xsk_destroy_xsk_struct(struct xsk_socket *xsk)
-{
-	free(xsk->ctx);
-	free(xsk);
-}
-
-int xsk_socket__update_xskmap(struct xsk_socket *xsk, int fd)
-{
-	xsk->ctx->xsks_map_fd = fd;
-	return xsk_set_bpf_maps(xsk);
-}
-
-int xsk_setup_xdp_prog(int ifindex, int *xsks_map_fd)
-{
-	struct xsk_socket *xsk;
-	int res;
-
-	xsk = calloc(1, sizeof(*xsk));
-	if (!xsk)
-		return -ENOMEM;
-
-	res = xsk_create_xsk_struct(ifindex, xsk);
-	if (res) {
-		free(xsk);
-		return -EINVAL;
-	}
-
-	res = __xsk_setup_xdp_prog(xsk, xsks_map_fd);
-
-	xsk_destroy_xsk_struct(xsk);
-
-	return res;
-}
-
 int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
-			      const char *ifname,
+			      int ifindex,
 			      __u32 queue_id, struct xsk_umem *umem,
 			      struct xsk_ring_cons *rx,
 			      struct xsk_ring_prod *tx,
@@ -998,7 +414,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
 	struct xdp_mmap_offsets off;
 	struct xsk_socket *xsk;
 	struct xsk_ctx *ctx;
-	int err, ifindex;
+	int err;
 
 	if (!umem || !xsk_ptr || !(rx || tx))
 		return -EFAULT;
@@ -1013,13 +429,6 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
 	if (err)
 		goto out_xsk_alloc;
 
-	xsk->outstanding_tx = 0;
-	ifindex = if_nametoindex(ifname);
-	if (!ifindex) {
-		err = -errno;
-		goto out_xsk_alloc;
-	}
-
 	if (umem->refcount++ > 0) {
 		xsk->fd = socket(AF_XDP, SOCK_RAW | SOCK_CLOEXEC, 0);
 		if (xsk->fd < 0) {
@@ -1039,8 +448,7 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
 			goto out_socket;
 		}
 
-		ctx = xsk_create_ctx(xsk, umem, ifindex, ifname, queue_id,
-				     fill, comp);
+		ctx = xsk_create_ctx(xsk, umem, ifindex, queue_id, fill, comp);
 		if (!ctx) {
 			err = -ENOMEM;
 			goto out_socket;
@@ -1138,12 +546,6 @@ int xsk_socket__create_shared(struct xsk_socket **xsk_ptr,
 		goto out_mmap_tx;
 	}
 
-	if (!(xsk->config.libbpf_flags & XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD)) {
-		err = __xsk_setup_xdp_prog(xsk, NULL);
-		if (err)
-			goto out_mmap_tx;
-	}
-
 	*xsk_ptr = xsk;
 	umem->fill_save = NULL;
 	umem->comp_save = NULL;
@@ -1167,7 +569,7 @@ out_xsk_alloc:
 	return err;
 }
 
-int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname,
+int xsk_socket__create(struct xsk_socket **xsk_ptr, int ifindex,
 		       __u32 queue_id, struct xsk_umem *umem,
 		       struct xsk_ring_cons *rx, struct xsk_ring_prod *tx,
 		       const struct xsk_socket_config *usr_config)
@@ -1175,7 +577,7 @@ int xsk_socket__create(struct xsk_socket **xsk_ptr, const char *ifname,
 	if (!umem)
 		return -EFAULT;
 
-	return xsk_socket__create_shared(xsk_ptr, ifname, queue_id, umem,
+	return xsk_socket__create_shared(xsk_ptr, ifindex, queue_id, umem,
 					 rx, tx, umem->fill_save,
 					 umem->comp_save, usr_config);
 }
@@ -1219,13 +621,6 @@ void xsk_socket__delete(struct xsk_socket *xsk)
 	ctx = xsk->ctx;
 	umem = ctx->umem;
 
-	if (ctx->refcount == 1) {
-		xsk_delete_bpf_maps(xsk);
-		close(ctx->prog_fd);
-		if (ctx->has_bpf_link)
-			close(ctx->link_fd);
-	}
-
 	xsk_put_ctx(ctx, true);
 
 	err = xsk_get_mmap_offsets(xsk->fd, &off);