From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: 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(). ... --- fs/dlm/ast.c | 287 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 287 insertions(+) create mode 100644 fs/dlm/ast.c (limited to 'fs/dlm/ast.c') diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c new file mode 100644 index 000000000..26fef9945 --- /dev/null +++ b/fs/dlm/ast.c @@ -0,0 +1,287 @@ +// SPDX-License-Identifier: GPL-2.0-only +/****************************************************************************** +******************************************************************************* +** +** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. +** Copyright (C) 2004-2010 Red Hat, Inc. All rights reserved. +** +** +******************************************************************************* +******************************************************************************/ + +#include + +#include "dlm_internal.h" +#include "memory.h" +#include "lock.h" +#include "user.h" +#include "ast.h" + +void dlm_release_callback(struct kref *ref) +{ + struct dlm_callback *cb = container_of(ref, struct dlm_callback, ref); + + dlm_free_cb(cb); +} + +void dlm_callback_set_last_ptr(struct dlm_callback **from, + struct dlm_callback *to) +{ + if (*from) + kref_put(&(*from)->ref, dlm_release_callback); + + if (to) + kref_get(&to->ref); + + *from = to; +} + +void dlm_purge_lkb_callbacks(struct dlm_lkb *lkb) +{ + struct dlm_callback *cb, *safe; + + list_for_each_entry_safe(cb, safe, &lkb->lkb_callbacks, list) { + list_del(&cb->list); + kref_put(&cb->ref, dlm_release_callback); + } + + lkb->lkb_flags &= ~DLM_IFL_CB_PENDING; + + /* invalidate */ + dlm_callback_set_last_ptr(&lkb->lkb_last_cast, NULL); + dlm_callback_set_last_ptr(&lkb->lkb_last_cb, NULL); + lkb->lkb_last_bast_mode = -1; +} + +int dlm_enqueue_lkb_callback(struct dlm_lkb *lkb, uint32_t flags, int mode, + int status, uint32_t sbflags) +{ + struct dlm_ls *ls = lkb->lkb_resource->res_ls; + int rv = DLM_ENQUEUE_CALLBACK_SUCCESS; + struct dlm_callback *cb; + int prev_mode; + + if (flags & DLM_CB_BAST) { + /* if cb is a bast, it should be skipped if the blocking mode is + * compatible with the last granted mode + */ + if (lkb->lkb_last_cast) { + if (dlm_modes_compat(mode, lkb->lkb_last_cast->mode)) { + log_debug(ls, "skip %x bast mode %d for cast mode %d", + lkb->lkb_id, mode, + lkb->lkb_last_cast->mode); + goto out; + } + } + + /* + * Suppress some redundant basts here, do more on removal. + * Don't even add a bast if the callback just before it + * is a bast for the same mode or a more restrictive mode. + * (the addional > PR check is needed for PR/CW inversion) + */ + if (lkb->lkb_last_cb && lkb->lkb_last_cb->flags & DLM_CB_BAST) { + prev_mode = lkb->lkb_last_cb->mode; + + if ((prev_mode == mode) || + (prev_mode > mode && prev_mode > DLM_LOCK_PR)) { + log_debug(ls, "skip %x add bast mode %d for bast mode %d", + lkb->lkb_id, mode, prev_mode); + goto out; + } + } + } + + cb = dlm_allocate_cb(); + if (!cb) { + rv = DLM_ENQUEUE_CALLBACK_FAILURE; + goto out; + } + + cb->flags = flags; + cb->mode = mode; + cb->sb_status = status; + cb->sb_flags = (sbflags & 0x000000FF); + kref_init(&cb->ref); + if (!(lkb->lkb_flags & DLM_IFL_CB_PENDING)) { + lkb->lkb_flags |= DLM_IFL_CB_PENDING; + rv = DLM_ENQUEUE_CALLBACK_NEED_SCHED; + } + list_add_tail(&cb->list, &lkb->lkb_callbacks); + + if (flags & DLM_CB_CAST) + dlm_callback_set_last_ptr(&lkb->lkb_last_cast, cb); + + dlm_callback_set_last_ptr(&lkb->lkb_last_cb, cb); + + out: + return rv; +} + +int dlm_dequeue_lkb_callback(struct dlm_lkb *lkb, struct dlm_callback **cb) +{ + /* oldest undelivered cb is callbacks first entry */ + *cb = list_first_entry_or_null(&lkb->lkb_callbacks, + struct dlm_callback, list); + if (!*cb) + return DLM_DEQUEUE_CALLBACK_EMPTY; + + /* remove it from callbacks so shift others down */ + list_del(&(*cb)->list); + if (list_empty(&lkb->lkb_callbacks)) + return DLM_DEQUEUE_CALLBACK_LAST; + + return DLM_DEQUEUE_CALLBACK_SUCCESS; +} + +void dlm_add_cb(struct dlm_lkb *lkb, uint32_t flags, int mode, int status, + uint32_t sbflags) +{ + struct dlm_ls *ls = lkb->lkb_resource->res_ls; + int rv; + + if (lkb->lkb_flags & DLM_IFL_USER) { + dlm_user_add_ast(lkb, flags, mode, status, sbflags); + return; + } + + spin_lock(&lkb->lkb_cb_lock); + rv = dlm_enqueue_lkb_callback(lkb, flags, mode, status, sbflags); + switch (rv) { + case DLM_ENQUEUE_CALLBACK_NEED_SCHED: + kref_get(&lkb->lkb_ref); + + spin_lock(&ls->ls_cb_lock); + if (test_bit(LSFL_CB_DELAY, &ls->ls_flags)) { + list_add(&lkb->lkb_cb_list, &ls->ls_cb_delay); + } else { + queue_work(ls->ls_callback_wq, &lkb->lkb_cb_work); + } + spin_unlock(&ls->ls_cb_lock); + break; + case DLM_ENQUEUE_CALLBACK_FAILURE: + WARN_ON_ONCE(1); + break; + case DLM_ENQUEUE_CALLBACK_SUCCESS: + break; + default: + WARN_ON_ONCE(1); + break; + } + spin_unlock(&lkb->lkb_cb_lock); +} + +void dlm_callback_work(struct work_struct *work) +{ + struct dlm_lkb *lkb = container_of(work, struct dlm_lkb, lkb_cb_work); + struct dlm_ls *ls = lkb->lkb_resource->res_ls; + void (*castfn) (void *astparam); + void (*bastfn) (void *astparam, int mode); + struct dlm_callback *cb; + int rv; + + spin_lock(&lkb->lkb_cb_lock); + rv = dlm_dequeue_lkb_callback(lkb, &cb); + spin_unlock(&lkb->lkb_cb_lock); + + if (WARN_ON_ONCE(rv == DLM_DEQUEUE_CALLBACK_EMPTY)) + goto out; + + for (;;) { + castfn = lkb->lkb_astfn; + bastfn = lkb->lkb_bastfn; + + if (cb->flags & DLM_CB_BAST) { + trace_dlm_bast(ls, lkb, cb->mode); + lkb->lkb_last_bast_time = ktime_get(); + lkb->lkb_last_bast_mode = cb->mode; + bastfn(lkb->lkb_astparam, cb->mode); + } else if (cb->flags & DLM_CB_CAST) { + lkb->lkb_lksb->sb_status = cb->sb_status; + lkb->lkb_lksb->sb_flags = cb->sb_flags; + trace_dlm_ast(ls, lkb); + lkb->lkb_last_cast_time = ktime_get(); + castfn(lkb->lkb_astparam); + } + + kref_put(&cb->ref, dlm_release_callback); + + spin_lock(&lkb->lkb_cb_lock); + rv = dlm_dequeue_lkb_callback(lkb, &cb); + if (rv == DLM_DEQUEUE_CALLBACK_EMPTY) { + lkb->lkb_flags &= ~DLM_IFL_CB_PENDING; + spin_unlock(&lkb->lkb_cb_lock); + break; + } + spin_unlock(&lkb->lkb_cb_lock); + } + +out: + /* undo kref_get from dlm_add_callback, may cause lkb to be freed */ + dlm_put_lkb(lkb); +} + +int dlm_callback_start(struct dlm_ls *ls) +{ + ls->ls_callback_wq = alloc_workqueue("dlm_callback", + WQ_HIGHPRI | WQ_MEM_RECLAIM, 0); + if (!ls->ls_callback_wq) { + log_print("can't start dlm_callback workqueue"); + return -ENOMEM; + } + return 0; +} + +void dlm_callback_stop(struct dlm_ls *ls) +{ + if (ls->ls_callback_wq) + destroy_workqueue(ls->ls_callback_wq); +} + +void dlm_callback_suspend(struct dlm_ls *ls) +{ + if (ls->ls_callback_wq) { + spin_lock(&ls->ls_cb_lock); + set_bit(LSFL_CB_DELAY, &ls->ls_flags); + spin_unlock(&ls->ls_cb_lock); + + flush_workqueue(ls->ls_callback_wq); + } +} + +#define MAX_CB_QUEUE 25 + +void dlm_callback_resume(struct dlm_ls *ls) +{ + struct dlm_lkb *lkb, *safe; + int count = 0, sum = 0; + bool empty; + + if (!ls->ls_callback_wq) + return; + +more: + spin_lock(&ls->ls_cb_lock); + list_for_each_entry_safe(lkb, safe, &ls->ls_cb_delay, lkb_cb_list) { + list_del_init(&lkb->lkb_cb_list); + queue_work(ls->ls_callback_wq, &lkb->lkb_cb_work); + count++; + if (count == MAX_CB_QUEUE) + break; + } + empty = list_empty(&ls->ls_cb_delay); + if (empty) + clear_bit(LSFL_CB_DELAY, &ls->ls_flags); + spin_unlock(&ls->ls_cb_lock); + + sum += count; + if (!empty) { + count = 0; + cond_resched(); + goto more; + } + + if (sum) + log_rinfo(ls, "%s %d", __func__, sum); +} + -- cgit v1.2.3