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().
  ...

1 files changed, 262 insertions, 0 deletions

diff --git a/io_uring/openclose.c b/io_uring/openclose.c
new file mode 100644
index 000000000..a1b98c81a
--- /dev/null
+++ b/io_uring/openclose.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/fdtable.h>
+#include <linux/fsnotify.h>
+#include <linux/namei.h>
+#include <linux/io_uring.h>
+
+#include <uapi/linux/io_uring.h>
+
+#include "../fs/internal.h"
+
+#include "io_uring.h"
+#include "rsrc.h"
+#include "openclose.h"
+
+struct io_open {
+	struct file			*file;
+	int				dfd;
+	u32				file_slot;
+	struct filename			*filename;
+	struct open_how			how;
+	unsigned long			nofile;
+};
+
+struct io_close {
+	struct file			*file;
+	int				fd;
+	u32				file_slot;
+};
+
+static bool io_openat_force_async(struct io_open *open)
+{
+	/*
+	 * Don't bother trying for O_TRUNC, O_CREAT, or O_TMPFILE open,
+	 * it'll always -EAGAIN
+	 */
+	return open->how.flags & (O_TRUNC | O_CREAT | O_TMPFILE);
+}
+
+static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_open *open = io_kiocb_to_cmd(req, struct io_open);
+	const char __user *fname;
+	int ret;
+
+	if (unlikely(sqe->buf_index))
+		return -EINVAL;
+	if (unlikely(req->flags & REQ_F_FIXED_FILE))
+		return -EBADF;
+
+	/* open.how should be already initialised */
+	if (!(open->how.flags & O_PATH) && force_o_largefile())
+		open->how.flags |= O_LARGEFILE;
+
+	open->dfd = READ_ONCE(sqe->fd);
+	fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
+	open->filename = getname(fname);
+	if (IS_ERR(open->filename)) {
+		ret = PTR_ERR(open->filename);
+		open->filename = NULL;
+		return ret;
+	}
+
+	open->file_slot = READ_ONCE(sqe->file_index);
+	if (open->file_slot && (open->how.flags & O_CLOEXEC))
+		return -EINVAL;
+
+	open->nofile = rlimit(RLIMIT_NOFILE);
+	req->flags |= REQ_F_NEED_CLEANUP;
+	if (io_openat_force_async(open))
+		req->flags |= REQ_F_FORCE_ASYNC;
+	return 0;
+}
+
+int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_open *open = io_kiocb_to_cmd(req, struct io_open);
+	u64 mode = READ_ONCE(sqe->len);
+	u64 flags = READ_ONCE(sqe->open_flags);
+
+	open->how = build_open_how(flags, mode);
+	return __io_openat_prep(req, sqe);
+}
+
+int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_open *open = io_kiocb_to_cmd(req, struct io_open);
+	struct open_how __user *how;
+	size_t len;
+	int ret;
+
+	how = u64_to_user_ptr(READ_ONCE(sqe->addr2));
+	len = READ_ONCE(sqe->len);
+	if (len < OPEN_HOW_SIZE_VER0)
+		return -EINVAL;
+
+	ret = copy_struct_from_user(&open->how, sizeof(open->how), how, len);
+	if (ret)
+		return ret;
+
+	return __io_openat_prep(req, sqe);
+}
+
+int io_openat2(struct io_kiocb *req, unsigned int issue_flags)
+{
+	struct io_open *open = io_kiocb_to_cmd(req, struct io_open);
+	struct open_flags op;
+	struct file *file;
+	bool resolve_nonblock, nonblock_set;
+	bool fixed = !!open->file_slot;
+	int ret;
+
+	ret = build_open_flags(&open->how, &op);
+	if (ret)
+		goto err;
+	nonblock_set = op.open_flag & O_NONBLOCK;
+	resolve_nonblock = open->how.resolve & RESOLVE_CACHED;
+	if (issue_flags & IO_URING_F_NONBLOCK) {
+		WARN_ON_ONCE(io_openat_force_async(open));
+		op.lookup_flags |= LOOKUP_CACHED;
+		op.open_flag |= O_NONBLOCK;
+	}
+
+	if (!fixed) {
+		ret = __get_unused_fd_flags(open->how.flags, open->nofile);
+		if (ret < 0)
+			goto err;
+	}
+
+	file = do_filp_open(open->dfd, open->filename, &op);
+	if (IS_ERR(file)) {
+		/*
+		 * We could hang on to this 'fd' on retrying, but seems like
+		 * marginal gain for something that is now known to be a slower
+		 * path. So just put it, and we'll get a new one when we retry.
+		 */
+		if (!fixed)
+			put_unused_fd(ret);
+
+		ret = PTR_ERR(file);
+		/* only retry if RESOLVE_CACHED wasn't already set by application */
+		if (ret == -EAGAIN &&
+		    (!resolve_nonblock && (issue_flags & IO_URING_F_NONBLOCK)))
+			return -EAGAIN;
+		goto err;
+	}
+
+	if ((issue_flags & IO_URING_F_NONBLOCK) && !nonblock_set)
+		file->f_flags &= ~O_NONBLOCK;
+	fsnotify_open(file);
+
+	if (!fixed)
+		fd_install(ret, file);
+	else
+		ret = io_fixed_fd_install(req, issue_flags, file,
+						open->file_slot);
+err:
+	putname(open->filename);
+	req->flags &= ~REQ_F_NEED_CLEANUP;
+	if (ret < 0)
+		req_set_fail(req);
+	io_req_set_res(req, ret, 0);
+	return IOU_OK;
+}
+
+int io_openat(struct io_kiocb *req, unsigned int issue_flags)
+{
+	return io_openat2(req, issue_flags);
+}
+
+void io_open_cleanup(struct io_kiocb *req)
+{
+	struct io_open *open = io_kiocb_to_cmd(req, struct io_open);
+
+	if (open->filename)
+		putname(open->filename);
+}
+
+int __io_close_fixed(struct io_ring_ctx *ctx, unsigned int issue_flags,
+		     unsigned int offset)
+{
+	int ret;
+
+	io_ring_submit_lock(ctx, issue_flags);
+	ret = io_fixed_fd_remove(ctx, offset);
+	io_ring_submit_unlock(ctx, issue_flags);
+
+	return ret;
+}
+
+static inline int io_close_fixed(struct io_kiocb *req, unsigned int issue_flags)
+{
+	struct io_close *close = io_kiocb_to_cmd(req, struct io_close);
+
+	return __io_close_fixed(req->ctx, issue_flags, close->file_slot - 1);
+}
+
+int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_close *close = io_kiocb_to_cmd(req, struct io_close);
+
+	if (sqe->off || sqe->addr || sqe->len || sqe->rw_flags || sqe->buf_index)
+		return -EINVAL;
+	if (req->flags & REQ_F_FIXED_FILE)
+		return -EBADF;
+
+	close->fd = READ_ONCE(sqe->fd);
+	close->file_slot = READ_ONCE(sqe->file_index);
+	if (close->file_slot && close->fd)
+		return -EINVAL;
+
+	return 0;
+}
+
+int io_close(struct io_kiocb *req, unsigned int issue_flags)
+{
+	struct files_struct *files = current->files;
+	struct io_close *close = io_kiocb_to_cmd(req, struct io_close);
+	struct fdtable *fdt;
+	struct file *file;
+	int ret = -EBADF;
+
+	if (close->file_slot) {
+		ret = io_close_fixed(req, issue_flags);
+		goto err;
+	}
+
+	spin_lock(&files->file_lock);
+	fdt = files_fdtable(files);
+	if (close->fd >= fdt->max_fds) {
+		spin_unlock(&files->file_lock);
+		goto err;
+	}
+	file = rcu_dereference_protected(fdt->fd[close->fd],
+			lockdep_is_held(&files->file_lock));
+	if (!file || io_is_uring_fops(file)) {
+		spin_unlock(&files->file_lock);
+		goto err;
+	}
+
+	/* if the file has a flush method, be safe and punt to async */
+	if (file->f_op->flush && (issue_flags & IO_URING_F_NONBLOCK)) {
+		spin_unlock(&files->file_lock);
+		return -EAGAIN;
+	}
+
+	file = __close_fd_get_file(close->fd);
+	spin_unlock(&files->file_lock);
+	if (!file)
+		goto err;
+
+	/* No ->flush() or already async, safely close from here */
+	ret = filp_close(file, current->files);
+err:
+	if (ret < 0)
+		req_set_fail(req);
+	io_req_set_res(req, ret, 0);
+	return IOU_OK;
+}