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(). ... --- net/6lowpan/ndisc.c | 233 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 net/6lowpan/ndisc.c (limited to 'net/6lowpan/ndisc.c') diff --git a/net/6lowpan/ndisc.c b/net/6lowpan/ndisc.c new file mode 100644 index 000000000..16be8f8b2 --- /dev/null +++ b/net/6lowpan/ndisc.c @@ -0,0 +1,233 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * + * Authors: + * (C) 2016 Pengutronix, Alexander Aring + */ + +#include +#include +#include + +#include "6lowpan_i.h" + +static int lowpan_ndisc_is_useropt(u8 nd_opt_type) +{ + return nd_opt_type == ND_OPT_6CO; +} + +#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) +#define NDISC_802154_SHORT_ADDR_LENGTH 1 +static int lowpan_ndisc_parse_802154_options(const struct net_device *dev, + struct nd_opt_hdr *nd_opt, + struct ndisc_options *ndopts) +{ + switch (nd_opt->nd_opt_len) { + case NDISC_802154_SHORT_ADDR_LENGTH: + if (ndopts->nd_802154_opt_array[nd_opt->nd_opt_type]) + ND_PRINTK(2, warn, + "%s: duplicated short addr ND6 option found: type=%d\n", + __func__, nd_opt->nd_opt_type); + else + ndopts->nd_802154_opt_array[nd_opt->nd_opt_type] = nd_opt; + return 1; + default: + /* all others will be handled by ndisc IPv6 option parsing */ + return 0; + } +} + +static int lowpan_ndisc_parse_options(const struct net_device *dev, + struct nd_opt_hdr *nd_opt, + struct ndisc_options *ndopts) +{ + if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154)) + return 0; + + switch (nd_opt->nd_opt_type) { + case ND_OPT_SOURCE_LL_ADDR: + case ND_OPT_TARGET_LL_ADDR: + return lowpan_ndisc_parse_802154_options(dev, nd_opt, ndopts); + default: + return 0; + } +} + +static void lowpan_ndisc_802154_update(struct neighbour *n, u32 flags, + u8 icmp6_type, + const struct ndisc_options *ndopts) +{ + struct lowpan_802154_neigh *neigh = lowpan_802154_neigh(neighbour_priv(n)); + u8 *lladdr_short = NULL; + + switch (icmp6_type) { + case NDISC_ROUTER_SOLICITATION: + case NDISC_ROUTER_ADVERTISEMENT: + case NDISC_NEIGHBOUR_SOLICITATION: + if (ndopts->nd_802154_opts_src_lladdr) { + lladdr_short = __ndisc_opt_addr_data(ndopts->nd_802154_opts_src_lladdr, + IEEE802154_SHORT_ADDR_LEN, 0); + if (!lladdr_short) { + ND_PRINTK(2, warn, + "NA: invalid short link-layer address length\n"); + return; + } + } + break; + case NDISC_REDIRECT: + case NDISC_NEIGHBOUR_ADVERTISEMENT: + if (ndopts->nd_802154_opts_tgt_lladdr) { + lladdr_short = __ndisc_opt_addr_data(ndopts->nd_802154_opts_tgt_lladdr, + IEEE802154_SHORT_ADDR_LEN, 0); + if (!lladdr_short) { + ND_PRINTK(2, warn, + "NA: invalid short link-layer address length\n"); + return; + } + } + break; + default: + break; + } + + write_lock_bh(&n->lock); + if (lladdr_short) { + ieee802154_be16_to_le16(&neigh->short_addr, lladdr_short); + if (!lowpan_802154_is_valid_src_short_addr(neigh->short_addr)) + neigh->short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC); + } + write_unlock_bh(&n->lock); +} + +static void lowpan_ndisc_update(const struct net_device *dev, + struct neighbour *n, u32 flags, u8 icmp6_type, + const struct ndisc_options *ndopts) +{ + if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154)) + return; + + /* react on overrides only. TODO check if this is really right. */ + if (flags & NEIGH_UPDATE_F_OVERRIDE) + lowpan_ndisc_802154_update(n, flags, icmp6_type, ndopts); +} + +static int lowpan_ndisc_opt_addr_space(const struct net_device *dev, + u8 icmp6_type, struct neighbour *neigh, + u8 *ha_buf, u8 **ha) +{ + struct lowpan_802154_neigh *n; + struct wpan_dev *wpan_dev; + int addr_space = 0; + + if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154)) + return 0; + + switch (icmp6_type) { + case NDISC_REDIRECT: + n = lowpan_802154_neigh(neighbour_priv(neigh)); + + read_lock_bh(&neigh->lock); + if (lowpan_802154_is_valid_src_short_addr(n->short_addr)) { + memcpy(ha_buf, &n->short_addr, + IEEE802154_SHORT_ADDR_LEN); + read_unlock_bh(&neigh->lock); + addr_space += __ndisc_opt_addr_space(IEEE802154_SHORT_ADDR_LEN, 0); + *ha = ha_buf; + } else { + read_unlock_bh(&neigh->lock); + } + break; + case NDISC_NEIGHBOUR_ADVERTISEMENT: + case NDISC_NEIGHBOUR_SOLICITATION: + case NDISC_ROUTER_SOLICITATION: + wpan_dev = lowpan_802154_dev(dev)->wdev->ieee802154_ptr; + + if (lowpan_802154_is_valid_src_short_addr(wpan_dev->short_addr)) + addr_space = __ndisc_opt_addr_space(IEEE802154_SHORT_ADDR_LEN, 0); + break; + default: + break; + } + + return addr_space; +} + +static void lowpan_ndisc_fill_addr_option(const struct net_device *dev, + struct sk_buff *skb, u8 icmp6_type, + const u8 *ha) +{ + struct wpan_dev *wpan_dev; + __be16 short_addr; + u8 opt_type; + + if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154)) + return; + + switch (icmp6_type) { + case NDISC_REDIRECT: + if (ha) { + ieee802154_le16_to_be16(&short_addr, ha); + __ndisc_fill_addr_option(skb, ND_OPT_TARGET_LL_ADDR, + &short_addr, + IEEE802154_SHORT_ADDR_LEN, 0); + } + return; + case NDISC_NEIGHBOUR_ADVERTISEMENT: + opt_type = ND_OPT_TARGET_LL_ADDR; + break; + case NDISC_ROUTER_SOLICITATION: + case NDISC_NEIGHBOUR_SOLICITATION: + opt_type = ND_OPT_SOURCE_LL_ADDR; + break; + default: + return; + } + + wpan_dev = lowpan_802154_dev(dev)->wdev->ieee802154_ptr; + + if (lowpan_802154_is_valid_src_short_addr(wpan_dev->short_addr)) { + ieee802154_le16_to_be16(&short_addr, + &wpan_dev->short_addr); + __ndisc_fill_addr_option(skb, opt_type, &short_addr, + IEEE802154_SHORT_ADDR_LEN, 0); + } +} + +static void lowpan_ndisc_prefix_rcv_add_addr(struct net *net, + struct net_device *dev, + const struct prefix_info *pinfo, + struct inet6_dev *in6_dev, + struct in6_addr *addr, + int addr_type, u32 addr_flags, + bool sllao, bool tokenized, + __u32 valid_lft, + u32 prefered_lft, + bool dev_addr_generated) +{ + int err; + + /* generates short based address for RA PIO's */ + if (lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154) && dev_addr_generated && + !addrconf_ifid_802154_6lowpan(addr->s6_addr + 8, dev)) { + err = addrconf_prefix_rcv_add_addr(net, dev, pinfo, in6_dev, + addr, addr_type, addr_flags, + sllao, tokenized, valid_lft, + prefered_lft); + if (err) + ND_PRINTK(2, warn, + "RA: could not add a short address based address for prefix: %pI6c\n", + &pinfo->prefix); + } +} +#endif + +const struct ndisc_ops lowpan_ndisc_ops = { + .is_useropt = lowpan_ndisc_is_useropt, +#if IS_ENABLED(CONFIG_IEEE802154_6LOWPAN) + .parse_options = lowpan_ndisc_parse_options, + .update = lowpan_ndisc_update, + .opt_addr_space = lowpan_ndisc_opt_addr_space, + .fill_addr_option = lowpan_ndisc_fill_addr_option, + .prefix_rcv_add_addr = lowpan_ndisc_prefix_rcv_add_addr, +#endif +}; -- cgit v1.2.3