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(). ... --- tools/perf/util/bpf_counter_cgroup.c | 295 +++++++++++++++++++++++++++++++++++ 1 file changed, 295 insertions(+) create mode 100644 tools/perf/util/bpf_counter_cgroup.c (limited to 'tools/perf/util/bpf_counter_cgroup.c') diff --git a/tools/perf/util/bpf_counter_cgroup.c b/tools/perf/util/bpf_counter_cgroup.c new file mode 100644 index 000000000..1c82377ed --- /dev/null +++ b/tools/perf/util/bpf_counter_cgroup.c @@ -0,0 +1,295 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Copyright (c) 2021 Facebook */ +/* Copyright (c) 2021 Google */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "affinity.h" +#include "bpf_counter.h" +#include "cgroup.h" +#include "counts.h" +#include "debug.h" +#include "evsel.h" +#include "evlist.h" +#include "target.h" +#include "cpumap.h" +#include "thread_map.h" + +#include "bpf_skel/bperf_cgroup.skel.h" + +static struct perf_event_attr cgrp_switch_attr = { + .type = PERF_TYPE_SOFTWARE, + .config = PERF_COUNT_SW_CGROUP_SWITCHES, + .size = sizeof(cgrp_switch_attr), + .sample_period = 1, + .disabled = 1, +}; + +static struct evsel *cgrp_switch; +static struct bperf_cgroup_bpf *skel; + +#define FD(evt, cpu) (*(int *)xyarray__entry(evt->core.fd, cpu, 0)) + +static int bperf_load_program(struct evlist *evlist) +{ + struct bpf_link *link; + struct evsel *evsel; + struct cgroup *cgrp, *leader_cgrp; + int i, j; + struct perf_cpu cpu; + int total_cpus = cpu__max_cpu().cpu; + int map_size, map_fd; + int prog_fd, err; + + skel = bperf_cgroup_bpf__open(); + if (!skel) { + pr_err("Failed to open cgroup skeleton\n"); + return -1; + } + + skel->rodata->num_cpus = total_cpus; + skel->rodata->num_events = evlist->core.nr_entries / nr_cgroups; + + BUG_ON(evlist->core.nr_entries % nr_cgroups != 0); + + /* we need one copy of events per cpu for reading */ + map_size = total_cpus * evlist->core.nr_entries / nr_cgroups; + bpf_map__set_max_entries(skel->maps.events, map_size); + bpf_map__set_max_entries(skel->maps.cgrp_idx, nr_cgroups); + /* previous result is saved in a per-cpu array */ + map_size = evlist->core.nr_entries / nr_cgroups; + bpf_map__set_max_entries(skel->maps.prev_readings, map_size); + /* cgroup result needs all events (per-cpu) */ + map_size = evlist->core.nr_entries; + bpf_map__set_max_entries(skel->maps.cgrp_readings, map_size); + + set_max_rlimit(); + + err = bperf_cgroup_bpf__load(skel); + if (err) { + pr_err("Failed to load cgroup skeleton\n"); + goto out; + } + + if (cgroup_is_v2("perf_event") > 0) + skel->bss->use_cgroup_v2 = 1; + + err = -1; + + cgrp_switch = evsel__new(&cgrp_switch_attr); + if (evsel__open_per_cpu(cgrp_switch, evlist->core.all_cpus, -1) < 0) { + pr_err("Failed to open cgroup switches event\n"); + goto out; + } + + perf_cpu_map__for_each_cpu(cpu, i, evlist->core.all_cpus) { + link = bpf_program__attach_perf_event(skel->progs.on_cgrp_switch, + FD(cgrp_switch, i)); + if (IS_ERR(link)) { + pr_err("Failed to attach cgroup program\n"); + err = PTR_ERR(link); + goto out; + } + } + + /* + * Update cgrp_idx map from cgroup-id to event index. + */ + cgrp = NULL; + i = 0; + + evlist__for_each_entry(evlist, evsel) { + if (cgrp == NULL || evsel->cgrp == leader_cgrp) { + leader_cgrp = evsel->cgrp; + evsel->cgrp = NULL; + + /* open single copy of the events w/o cgroup */ + err = evsel__open_per_cpu(evsel, evsel->core.cpus, -1); + if (err == 0) + evsel->supported = true; + + map_fd = bpf_map__fd(skel->maps.events); + perf_cpu_map__for_each_cpu(cpu, j, evsel->core.cpus) { + int fd = FD(evsel, j); + __u32 idx = evsel->core.idx * total_cpus + cpu.cpu; + + bpf_map_update_elem(map_fd, &idx, &fd, BPF_ANY); + } + + evsel->cgrp = leader_cgrp; + } + + if (evsel->cgrp == cgrp) + continue; + + cgrp = evsel->cgrp; + + if (read_cgroup_id(cgrp) < 0) { + pr_err("Failed to get cgroup id\n"); + err = -1; + goto out; + } + + map_fd = bpf_map__fd(skel->maps.cgrp_idx); + err = bpf_map_update_elem(map_fd, &cgrp->id, &i, BPF_ANY); + if (err < 0) { + pr_err("Failed to update cgroup index map\n"); + goto out; + } + + i++; + } + + /* + * bperf uses BPF_PROG_TEST_RUN to get accurate reading. Check + * whether the kernel support it + */ + prog_fd = bpf_program__fd(skel->progs.trigger_read); + err = bperf_trigger_reading(prog_fd, 0); + if (err) { + pr_warning("The kernel does not support test_run for raw_tp BPF programs.\n" + "Therefore, --for-each-cgroup might show inaccurate readings\n"); + err = 0; + } + +out: + return err; +} + +static int bperf_cgrp__load(struct evsel *evsel, + struct target *target __maybe_unused) +{ + static bool bperf_loaded = false; + + evsel->bperf_leader_prog_fd = -1; + evsel->bperf_leader_link_fd = -1; + + if (!bperf_loaded && bperf_load_program(evsel->evlist)) + return -1; + + bperf_loaded = true; + /* just to bypass bpf_counter_skip() */ + evsel->follower_skel = (struct bperf_follower_bpf *)skel; + + return 0; +} + +static int bperf_cgrp__install_pe(struct evsel *evsel __maybe_unused, + int cpu __maybe_unused, int fd __maybe_unused) +{ + /* nothing to do */ + return 0; +} + +/* + * trigger the leader prog on each cpu, so the cgrp_reading map could get + * the latest results. + */ +static int bperf_cgrp__sync_counters(struct evlist *evlist) +{ + struct perf_cpu cpu; + int idx; + int prog_fd = bpf_program__fd(skel->progs.trigger_read); + + perf_cpu_map__for_each_cpu(cpu, idx, evlist->core.all_cpus) + bperf_trigger_reading(prog_fd, cpu.cpu); + + return 0; +} + +static int bperf_cgrp__enable(struct evsel *evsel) +{ + if (evsel->core.idx) + return 0; + + bperf_cgrp__sync_counters(evsel->evlist); + + skel->bss->enabled = 1; + return 0; +} + +static int bperf_cgrp__disable(struct evsel *evsel) +{ + if (evsel->core.idx) + return 0; + + bperf_cgrp__sync_counters(evsel->evlist); + + skel->bss->enabled = 0; + return 0; +} + +static int bperf_cgrp__read(struct evsel *evsel) +{ + struct evlist *evlist = evsel->evlist; + int total_cpus = cpu__max_cpu().cpu; + struct perf_counts_values *counts; + struct bpf_perf_event_value *values; + int reading_map_fd, err = 0; + + if (evsel->core.idx) + return 0; + + bperf_cgrp__sync_counters(evsel->evlist); + + values = calloc(total_cpus, sizeof(*values)); + if (values == NULL) + return -ENOMEM; + + reading_map_fd = bpf_map__fd(skel->maps.cgrp_readings); + + evlist__for_each_entry(evlist, evsel) { + __u32 idx = evsel->core.idx; + int i; + struct perf_cpu cpu; + + err = bpf_map_lookup_elem(reading_map_fd, &idx, values); + if (err) { + pr_err("bpf map lookup failed: idx=%u, event=%s, cgrp=%s\n", + idx, evsel__name(evsel), evsel->cgrp->name); + goto out; + } + + perf_cpu_map__for_each_cpu(cpu, i, evsel->core.cpus) { + counts = perf_counts(evsel->counts, i, 0); + counts->val = values[cpu.cpu].counter; + counts->ena = values[cpu.cpu].enabled; + counts->run = values[cpu.cpu].running; + } + } + +out: + free(values); + return err; +} + +static int bperf_cgrp__destroy(struct evsel *evsel) +{ + if (evsel->core.idx) + return 0; + + bperf_cgroup_bpf__destroy(skel); + evsel__delete(cgrp_switch); // it'll destroy on_switch progs too + + return 0; +} + +struct bpf_counter_ops bperf_cgrp_ops = { + .load = bperf_cgrp__load, + .enable = bperf_cgrp__enable, + .disable = bperf_cgrp__disable, + .read = bperf_cgrp__read, + .install_pe = bperf_cgrp__install_pe, + .destroy = bperf_cgrp__destroy, +}; -- cgit v1.2.3