kernel/linux.git/io_uring, branch master

Merge tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2026-04-15T01:36:10+00:00

Pull networking updates from Jakub Kicinski: "Core & protocols: - Support HW queue leasing, allowing containers to be granted access to HW queues for zero-copy operations and AF_XDP - Number of code moves to help the compiler with inlining. Avoid output arguments for returning drop reason where possible - Rework drop handling within qdiscs to include more metadata about the reason and dropping qdisc in the tracepoints - Remove the rtnl_lock use from IP Multicast Routing - Pack size information into the Rx Flow Steering table pointer itself. This allows making the table itself a flat array of u32s, thus making the table allocation size a power of two - Report TCP delayed ack timer information via socket diag - Add ip_local_port_step_width sysctl to allow distributing the randomly selected ports more evenly throughout the allowed space - Add support for per-route tunsrc in IPv6 segment routing - Start work of switching sockopt handling to iov_iter - Improve dynamic recvbuf sizing in MPTCP, limit burstiness and avoid buffer size drifting up - Support MSG_EOR in MPTCP - Add stp_mode attribute to the bridge driver for STP mode selection. This addresses concerns about call_usermodehelper() usage - Remove UDP-Lite support (as announced in 2023) - Remove support for building IPv6 as a module. Remove the now unnecessary function calling indirection Cross-tree stuff: - Move Michael MIC code from generic crypto into wireless, it's considered insecure but some WiFi networks still need it Netfilter: - Switch nft_fib_ipv6 module to no longer need temporary dst_entry object allocations by using fib6_lookup() + RCU. Florian W reports this gets us ~13% higher packet rate - Convert IPVS's global __ip_vs_mutex to per-net service_mutex and switch the service tables to be per-net. Convert some code that walks the service lists to use RCU instead of the service_mutex - Add more opinionated input validation to lower security exposure - Make IPVS hash tables to be per-netns and resizable Wireless: - Finished assoc frame encryption/EPPKE/802.1X-over-auth - Radar detection improvements - Add 6 GHz incumbent signal detection APIs - Multi-link support for FILS, probe response templates and client probing - New APIs and mac80211 support for NAN (Neighbor Aware Networking, aka Wi-Fi Aware) so less work must be in firmware Driver API: - Add numerical ID for devlink instances (to avoid having to create fake bus/device pairs just to have an ID). Support shared devlink instances which span multiple PFs - Add standard counters for reporting pause storm events (implement in mlx5 and fbnic) - Add configuration API for completion writeback buffering (implement in mana) - Support driver-initiated change of RSS context sizes - Support DPLL monitoring input frequency (implement in zl3073x) - Support per-port resources in devlink (implement in mlx5) Misc: - Expand the YAML spec for Netfilter Drivers - Software: - macvlan: support multicast rx for bridge ports with shared source MAC address - team: decouple receive and transmit enablement for IEEE 802.3ad LACP "independent control" - Ethernet high-speed NICs: - nVidia/Mellanox: - support high order pages in zero-copy mode (for payload coalescing) - support multiple packets in a page (for systems with 64kB pages) - Broadcom 25-400GE (bnxt): - implement XDP RSS hash metadata extraction - add software fallback for UDP GSO, lowering the IOMMU cost - Broadcom 800GE (bnge): - add link status and configuration handling - add various HW and SW statistics - Marvell/Cavium: - NPC HW block support for cn20k - Huawei (hinic3): - add mailbox / control queue - add rx VLAN offload - add driver info and link management - Ethernet NICs: - Marvell/Aquantia: - support reading SFP module info on some AQC100 cards - Realtek PCI (r8169): - add support for RTL8125cp - Realtek USB (r8152): - support for the RTL8157 5Gbit chip - add 2500baseT EEE status/configuration support - Ethernet NICs embedded and off-the-shelf IP: - Synopsys (stmmac): - cleanup and reorganize SerDes handling and PCS support - cleanup descriptor handling and per-platform data - cleanup and consolidate MDIO defines and handling - shrink driver memory use for internal structures - improve Tx IRQ coalescing - improve TCP segmentation handling - add support for Spacemit K3 - Cadence (macb): - support PHYs that have inband autoneg disabled with GEM - support IEEE 802.3az EEE - rework usrio capabilities and handling - AMD (xgbe): - improve power management for S0i3 - improve TX resilience for link-down handling - Virtual: - Google cloud vNIC: - support larger ring sizes in DQO-QPL mode - improve HW-GRO handling - support UDP GSO for DQO format - PCIe NTB: - support queue count configuration - Ethernet PHYs: - automatically disable PHY autonomous EEE if MAC is in charge - Broadcom: - add BCM84891/BCM84892 support - Micrel: - support for LAN9645X internal PHY - Realtek: - add RTL8224 pair order support - support PHY LEDs on RTL8211F-VD - support spread spectrum clocking (SSC) - Maxlinear: - add PHY-level statistics via ethtool - Ethernet switches: - Maxlinear (mxl862xx): - support for bridge offloading - support for VLANs - support driver statistics - Bluetooth: - large number of fixes and new device IDs - Mediatek: - support MT6639 (MT7927) - support MT7902 SDIO - WiFi: - Intel (iwlwifi): - UNII-9 and continuing UHR work - MediaTek (mt76): - mt7996/mt7925 MLO fixes/improvements - mt7996 NPU support (HW eth/wifi traffic offload) - Qualcomm (ath12k): - monitor mode support on IPQ5332 - basic hwmon temperature reporting - support IPQ5424 - Realtek: - add USB RX aggregation to improve performance - add USB TX flow control by tracking in-flight URBs - Cellular: - IPA v5.2 support" * tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1561 commits) net: pse-pd: fix kernel-doc function name for pse_control_find_by_id() wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit wireguard: allowedips: remove redundant space tools: ynl: add sample for wireguard wireguard: allowedips: Use kfree_rcu() instead of call_rcu() MAINTAINERS: Add netkit selftest files selftests/net: Add additional test coverage in nk_qlease selftests/net: Split netdevsim tests from HW tests in nk_qlease tools/ynl: Make YnlFamily closeable as a context manager net: airoha: Add missing PPE configurations in airoha_ppe_hw_init() net: airoha: Fix VIP configuration for AN7583 SoC net: caif: clear client service pointer on teardown net: strparser: fix skb_head leak in strp_abort_strp() net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete() selftests/bpf: add test for xdp_master_redirect with bond not up net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master net: airoha: Remove PCE_MC_EN_MASK bit in REG_FE_PCE_CFG configuration sctp: disable BH before calling udp_tunnel_xmit_skb() sctp: fix missing encap_port propagation for GSO fragments net: airoha: Rely on net_device pointer in ETS callbacks ...

Merge tag 'for-7.1/io_uring-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

2026-04-13T23:22:30+00:00

Pull io_uring updates from Jens Axboe: - Add a callback driven main loop for io_uring, and BPF struct_ops on top to allow implementing custom event loop logic - Decouple IOPOLL from being a ring-wide all-or-nothing setting, allowing IOPOLL use cases to also issue certain white listed non-polled opcodes - Timeout improvements. Migrate internal timeout storage from timespec64 to ktime_t for simpler arithmetic and avoid copying of timespec data - Zero-copy receive (zcrx) updates: - Add a device-less mode (ZCRX_REG_NODEV) for testing and experimentation where data flows through the copy fallback path - Fix two-step unregistration regression, DMA length calculations, xarray mark usage, and a potential 32-bit overflow in id shifting - Refactoring toward multi-area support: dedicated refill queue struct, consolidated DMA syncing, netmem array refilling format, and guard-based locking - Zero-copy transmit (zctx) cleanup: - Unify io_send_zc() and io_sendmsg_zc() into a single function - Add vectorized registered buffer send for IORING_OP_SEND_ZC - Add separate notification user_data via sqe->addr3 so notification and completion CQEs can be distinguished without extra reference counting - Switch struct io_ring_ctx internal bitfields to explicit flag bits with atomic-safe accessors, and annotate the known harmless races on those flags - Various optimizations caching ctx and other request fields in local variables to avoid repeated loads, and cleanups for tctx setup, ring fd registration, and read path early returns * tag 'for-7.1/io_uring-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (58 commits) io_uring: unify getting ctx from passed in file descriptor io_uring/register: don't get a reference to the registered ring fd io_uring/tctx: clean up __io_uring_add_tctx_node() error handling io_uring/tctx: have io_uring_alloc_task_context() return tctx io_uring/timeout: use 'ctx' consistently io_uring/rw: clean up __io_read() obsolete comment and early returns io_uring/zcrx: use correct mmap off constants io_uring/zcrx: use dma_len for chunk size calculation io_uring/zcrx: don't clear not allocated niovs io_uring/zcrx: don't use mark0 for allocating xarray io_uring: cast id to u64 before shifting in io_allocate_rbuf_ring() io_uring/zcrx: reject REG_NODEV with large rx_buf_size io_uring/cancel: validate opcode for IORING_ASYNC_CANCEL_OP io_uring/rsrc: use io_cache_free() to free node io_uring/zcrx: rename zcrx [un]register functions io_uring/zcrx: check ctrl op payload struct sizes io_uring/zcrx: cache fallback availability in zcrx ctx io_uring/zcrx: warn on a repeated area append io_uring/zcrx: consolidate dma syncing io_uring/zcrx: netmem array as refiling format ...

Merge tag 'vfs-7.1-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2026-04-13T21:20:11+00:00

Pull misc vfs updates from Christian Brauner: "Features: - coredump: add tracepoint for coredump events - fs: hide file and bfile caches behind runtime const machinery Fixes: - fix architecture-specific compat_ftruncate64 implementations - dcache: Limit the minimal number of bucket to two - fs/omfs: reject s_sys_blocksize smaller than OMFS_DIR_START - fs/mbcache: cancel shrink work before destroying the cache - dcache: permit dynamic_dname()s up to NAME_MAX Cleanups: - remove or unexport unused fs_context infrastructure - trivial ->setattr cleanups - selftests/filesystems: Assume that TIOCGPTPEER is defined - writeback: fix kernel-doc function name mismatch for wb_put_many() - autofs: replace manual symlink buffer allocation in autofs_dir_symlink - init/initramfs.c: trivial fix: FSM -> Finite-state machine - fs: remove stale and duplicate forward declarations - readdir: Introduce dirent_size() - fs: Replace user_access_{begin/end} by scoped user access - kernel: acct: fix duplicate word in comment - fs: write a better comment in step_into() concerning .mnt assignment - fs: attr: fix comment formatting and spelling issues" * tag 'vfs-7.1-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (28 commits) dcache: permit dynamic_dname()s up to NAME_MAX fs: attr: fix comment formatting and spelling issues fs: hide file and bfile caches behind runtime const machinery fs: write a better comment in step_into() concerning .mnt assignment proc: rename proc_notify_change to proc_setattr proc: rename proc_setattr to proc_nochmod_setattr affs: rename affs_notify_change to affs_setattr adfs: rename adfs_notify_change to adfs_setattr hfs: update comments on hfs_inode_setattr kernel: acct: fix duplicate word in comment fs: Replace user_access_{begin/end} by scoped user access readdir: Introduce dirent_size() coredump: add tracepoint for coredump events fs: remove do_sys_truncate fs: pass on FTRUNCATE_* flags to do_truncate fs: fix archiecture-specific compat_ftruncate64 fs: remove stale and duplicate forward declarations init/initramfs.c: trivial fix: FSM -> Finite-state machine autofs: replace manual symlink buffer allocation in autofs_dir_symlink fs/mbcache: cancel shrink work before destroying the cache ...

Merge branch 'netkit-support-for-io_uring-zero-copy-and-af_xdp'

2026-04-10T01:24:35+00:00

Daniel Borkmann says: ==================== netkit: Support for io_uring zero-copy and AF_XDP Containers use virtual netdevs to route traffic from a physical netdev in the host namespace. They do not have access to the physical netdev in the host and thus can't use memory providers or AF_XDP that require reconfiguring/restarting queues in the physical netdev. This patchset adds the concept of queue leasing to virtual netdevs that allow containers to use memory providers and AF_XDP at native speed. Leased queues are bound to a real queue in a physical netdev and act as a proxy. Memory providers and AF_XDP operations take an ifindex and queue id, so containers would pass in an ifindex for a virtual netdev and a queue id of a leased queue, which then gets proxied to the underlying real queue. We have implemented support for this concept in netkit and tested the latter against Nvidia ConnectX-6 (mlx5) as well as Broadcom BCM957504 (bnxt_en) 100G NICs. For more details see the individual patches. ==================== Link: https://patch.msgid.link/20260402231031.447597-1-daniel@iogearbox.net Signed-off-by: Jakub Kicinski

net: Proxy netdev_queue_get_dma_dev for leased queues

2026-04-10T01:21:46+00:00

Extend netdev_queue_get_dma_dev to return the physical device of the real rxq for DMA in case the queue was leased. This allows memory providers like io_uring zero-copy or devmem to bind to the physically leased rxq via virtual devices such as netkit. Signed-off-by: David Wei Co-developed-by: Daniel Borkmann Signed-off-by: Daniel Borkmann Reviewed-by: Nikolay Aleksandrov Link: https://patch.msgid.link/20260402231031.447597-8-daniel@iogearbox.net Signed-off-by: Jakub Kicinski

net: Slightly simplify net_mp_{open,close}_rxq

2026-04-10T01:21:46+00:00

net_mp_open_rxq is currently not used in the tree as all callers are using __net_mp_open_rxq directly, and net_mp_close_rxq is only used once while all other locations use __net_mp_close_rxq. Consolidate into a single API, netif_mp_{open,close}_rxq, using the netif_ prefix to indicate that the caller is responsible for locking. Signed-off-by: Daniel Borkmann Co-developed-by: David Wei Signed-off-by: David Wei Reviewed-by: Nikolay Aleksandrov Link: https://patch.msgid.link/20260402231031.447597-6-daniel@iogearbox.net Signed-off-by: Jakub Kicinski

io_uring: unify getting ctx from passed in file descriptor

2026-04-08T19:21:35+00:00

io_uring_enter() and io_uring_register() end up having duplicated code for getting a ctx from a passed in file descriptor, for either a registered ring descriptor or a normal file descriptor. Move the io_uring_register_get_file() into io_uring.c and name it a bit more generically, and use it from both callsites rather than have that logic and handling duplicated. Signed-off-by: Jens Axboe

io_uring/register: don't get a reference to the registered ring fd

2026-04-08T19:21:35+00:00

This isn't necessary and was only done because the register path isn't a hot path and hence the extra ref/put doesn't matter, and to have the exit path be able to unconditionally put whatever file was gotten regardless of the type. In preparation for sharing this code with the main io_uring_enter(2) syscall, drop the reference and have the caller conditionally put the file if it was a normal file descriptor. Signed-off-by: Jens Axboe

io_uring/tctx: clean up __io_uring_add_tctx_node() error handling

2026-04-08T19:21:34+00:00

Refactor __io_uring_add_tctx_node() so that on error it never leaves current->io_uring pointing at a half-setup tctx. This moves the assignment of current->io_uring to the end of the function post any failure points. Separate out the node installation into io_tctx_install_node() to further clean this up. Signed-off-by: Jens Axboe

io_uring/tctx: have io_uring_alloc_task_context() return tctx

2026-04-08T19:21:30+00:00

Instead of having io_uring_alloc_task_context() return an int and assign tsk->io_uring, just have it return the task context directly. This enables cleaner error handling in callers, which may have failure points post calling io_uring_alloc_task_context(). Signed-off-by: Jens Axboe