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/phonet/pn_dev.c | 419 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 419 insertions(+) create mode 100644 net/phonet/pn_dev.c (limited to 'net/phonet/pn_dev.c') diff --git a/net/phonet/pn_dev.c b/net/phonet/pn_dev.c new file mode 100644 index 000000000..cde671d29 --- /dev/null +++ b/net/phonet/pn_dev.c @@ -0,0 +1,419 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * File: pn_dev.c + * + * Phonet network device + * + * Copyright (C) 2008 Nokia Corporation. + * + * Authors: Sakari Ailus + * Rémi Denis-Courmont + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct phonet_routes { + struct mutex lock; + struct net_device __rcu *table[64]; +}; + +struct phonet_net { + struct phonet_device_list pndevs; + struct phonet_routes routes; +}; + +static unsigned int phonet_net_id __read_mostly; + +static struct phonet_net *phonet_pernet(struct net *net) +{ + return net_generic(net, phonet_net_id); +} + +struct phonet_device_list *phonet_device_list(struct net *net) +{ + struct phonet_net *pnn = phonet_pernet(net); + return &pnn->pndevs; +} + +/* Allocate new Phonet device. */ +static struct phonet_device *__phonet_device_alloc(struct net_device *dev) +{ + struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); + struct phonet_device *pnd = kmalloc(sizeof(*pnd), GFP_ATOMIC); + if (pnd == NULL) + return NULL; + pnd->netdev = dev; + bitmap_zero(pnd->addrs, 64); + + BUG_ON(!mutex_is_locked(&pndevs->lock)); + list_add_rcu(&pnd->list, &pndevs->list); + return pnd; +} + +static struct phonet_device *__phonet_get(struct net_device *dev) +{ + struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); + struct phonet_device *pnd; + + BUG_ON(!mutex_is_locked(&pndevs->lock)); + list_for_each_entry(pnd, &pndevs->list, list) { + if (pnd->netdev == dev) + return pnd; + } + return NULL; +} + +static struct phonet_device *__phonet_get_rcu(struct net_device *dev) +{ + struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); + struct phonet_device *pnd; + + list_for_each_entry_rcu(pnd, &pndevs->list, list) { + if (pnd->netdev == dev) + return pnd; + } + return NULL; +} + +static void phonet_device_destroy(struct net_device *dev) +{ + struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); + struct phonet_device *pnd; + + ASSERT_RTNL(); + + mutex_lock(&pndevs->lock); + pnd = __phonet_get(dev); + if (pnd) + list_del_rcu(&pnd->list); + mutex_unlock(&pndevs->lock); + + if (pnd) { + u8 addr; + + for_each_set_bit(addr, pnd->addrs, 64) + phonet_address_notify(RTM_DELADDR, dev, addr); + kfree(pnd); + } +} + +struct net_device *phonet_device_get(struct net *net) +{ + struct phonet_device_list *pndevs = phonet_device_list(net); + struct phonet_device *pnd; + struct net_device *dev = NULL; + + rcu_read_lock(); + list_for_each_entry_rcu(pnd, &pndevs->list, list) { + dev = pnd->netdev; + BUG_ON(!dev); + + if ((dev->reg_state == NETREG_REGISTERED) && + ((pnd->netdev->flags & IFF_UP)) == IFF_UP) + break; + dev = NULL; + } + dev_hold(dev); + rcu_read_unlock(); + return dev; +} + +int phonet_address_add(struct net_device *dev, u8 addr) +{ + struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); + struct phonet_device *pnd; + int err = 0; + + mutex_lock(&pndevs->lock); + /* Find or create Phonet-specific device data */ + pnd = __phonet_get(dev); + if (pnd == NULL) + pnd = __phonet_device_alloc(dev); + if (unlikely(pnd == NULL)) + err = -ENOMEM; + else if (test_and_set_bit(addr >> 2, pnd->addrs)) + err = -EEXIST; + mutex_unlock(&pndevs->lock); + return err; +} + +int phonet_address_del(struct net_device *dev, u8 addr) +{ + struct phonet_device_list *pndevs = phonet_device_list(dev_net(dev)); + struct phonet_device *pnd; + int err = 0; + + mutex_lock(&pndevs->lock); + pnd = __phonet_get(dev); + if (!pnd || !test_and_clear_bit(addr >> 2, pnd->addrs)) { + err = -EADDRNOTAVAIL; + pnd = NULL; + } else if (bitmap_empty(pnd->addrs, 64)) + list_del_rcu(&pnd->list); + else + pnd = NULL; + mutex_unlock(&pndevs->lock); + + if (pnd) + kfree_rcu(pnd, rcu); + + return err; +} + +/* Gets a source address toward a destination, through a interface. */ +u8 phonet_address_get(struct net_device *dev, u8 daddr) +{ + struct phonet_device *pnd; + u8 saddr; + + rcu_read_lock(); + pnd = __phonet_get_rcu(dev); + if (pnd) { + BUG_ON(bitmap_empty(pnd->addrs, 64)); + + /* Use same source address as destination, if possible */ + if (test_bit(daddr >> 2, pnd->addrs)) + saddr = daddr; + else + saddr = find_first_bit(pnd->addrs, 64) << 2; + } else + saddr = PN_NO_ADDR; + rcu_read_unlock(); + + if (saddr == PN_NO_ADDR) { + /* Fallback to another device */ + struct net_device *def_dev; + + def_dev = phonet_device_get(dev_net(dev)); + if (def_dev) { + if (def_dev != dev) + saddr = phonet_address_get(def_dev, daddr); + dev_put(def_dev); + } + } + return saddr; +} + +int phonet_address_lookup(struct net *net, u8 addr) +{ + struct phonet_device_list *pndevs = phonet_device_list(net); + struct phonet_device *pnd; + int err = -EADDRNOTAVAIL; + + rcu_read_lock(); + list_for_each_entry_rcu(pnd, &pndevs->list, list) { + /* Don't allow unregistering devices! */ + if ((pnd->netdev->reg_state != NETREG_REGISTERED) || + ((pnd->netdev->flags & IFF_UP)) != IFF_UP) + continue; + + if (test_bit(addr >> 2, pnd->addrs)) { + err = 0; + goto found; + } + } +found: + rcu_read_unlock(); + return err; +} + +/* automatically configure a Phonet device, if supported */ +static int phonet_device_autoconf(struct net_device *dev) +{ + struct if_phonet_req req; + int ret; + + if (!dev->netdev_ops->ndo_siocdevprivate) + return -EOPNOTSUPP; + + ret = dev->netdev_ops->ndo_siocdevprivate(dev, (struct ifreq *)&req, + NULL, SIOCPNGAUTOCONF); + if (ret < 0) + return ret; + + ASSERT_RTNL(); + ret = phonet_address_add(dev, req.ifr_phonet_autoconf.device); + if (ret) + return ret; + phonet_address_notify(RTM_NEWADDR, dev, + req.ifr_phonet_autoconf.device); + return 0; +} + +static void phonet_route_autodel(struct net_device *dev) +{ + struct phonet_net *pnn = phonet_pernet(dev_net(dev)); + unsigned int i; + DECLARE_BITMAP(deleted, 64); + + /* Remove left-over Phonet routes */ + bitmap_zero(deleted, 64); + mutex_lock(&pnn->routes.lock); + for (i = 0; i < 64; i++) + if (rcu_access_pointer(pnn->routes.table[i]) == dev) { + RCU_INIT_POINTER(pnn->routes.table[i], NULL); + set_bit(i, deleted); + } + mutex_unlock(&pnn->routes.lock); + + if (bitmap_empty(deleted, 64)) + return; /* short-circuit RCU */ + synchronize_rcu(); + for_each_set_bit(i, deleted, 64) { + rtm_phonet_notify(RTM_DELROUTE, dev, i); + dev_put(dev); + } +} + +/* notify Phonet of device events */ +static int phonet_device_notify(struct notifier_block *me, unsigned long what, + void *ptr) +{ + struct net_device *dev = netdev_notifier_info_to_dev(ptr); + + switch (what) { + case NETDEV_REGISTER: + if (dev->type == ARPHRD_PHONET) + phonet_device_autoconf(dev); + break; + case NETDEV_UNREGISTER: + phonet_device_destroy(dev); + phonet_route_autodel(dev); + break; + } + return 0; + +} + +static struct notifier_block phonet_device_notifier = { + .notifier_call = phonet_device_notify, + .priority = 0, +}; + +/* Per-namespace Phonet devices handling */ +static int __net_init phonet_init_net(struct net *net) +{ + struct phonet_net *pnn = phonet_pernet(net); + + if (!proc_create_net("phonet", 0, net->proc_net, &pn_sock_seq_ops, + sizeof(struct seq_net_private))) + return -ENOMEM; + + INIT_LIST_HEAD(&pnn->pndevs.list); + mutex_init(&pnn->pndevs.lock); + mutex_init(&pnn->routes.lock); + return 0; +} + +static void __net_exit phonet_exit_net(struct net *net) +{ + struct phonet_net *pnn = phonet_pernet(net); + + remove_proc_entry("phonet", net->proc_net); + WARN_ON_ONCE(!list_empty(&pnn->pndevs.list)); +} + +static struct pernet_operations phonet_net_ops = { + .init = phonet_init_net, + .exit = phonet_exit_net, + .id = &phonet_net_id, + .size = sizeof(struct phonet_net), +}; + +/* Initialize Phonet devices list */ +int __init phonet_device_init(void) +{ + int err = register_pernet_subsys(&phonet_net_ops); + if (err) + return err; + + proc_create_net("pnresource", 0, init_net.proc_net, &pn_res_seq_ops, + sizeof(struct seq_net_private)); + register_netdevice_notifier(&phonet_device_notifier); + err = phonet_netlink_register(); + if (err) + phonet_device_exit(); + return err; +} + +void phonet_device_exit(void) +{ + rtnl_unregister_all(PF_PHONET); + unregister_netdevice_notifier(&phonet_device_notifier); + unregister_pernet_subsys(&phonet_net_ops); + remove_proc_entry("pnresource", init_net.proc_net); +} + +int phonet_route_add(struct net_device *dev, u8 daddr) +{ + struct phonet_net *pnn = phonet_pernet(dev_net(dev)); + struct phonet_routes *routes = &pnn->routes; + int err = -EEXIST; + + daddr = daddr >> 2; + mutex_lock(&routes->lock); + if (routes->table[daddr] == NULL) { + rcu_assign_pointer(routes->table[daddr], dev); + dev_hold(dev); + err = 0; + } + mutex_unlock(&routes->lock); + return err; +} + +int phonet_route_del(struct net_device *dev, u8 daddr) +{ + struct phonet_net *pnn = phonet_pernet(dev_net(dev)); + struct phonet_routes *routes = &pnn->routes; + + daddr = daddr >> 2; + mutex_lock(&routes->lock); + if (rcu_access_pointer(routes->table[daddr]) == dev) + RCU_INIT_POINTER(routes->table[daddr], NULL); + else + dev = NULL; + mutex_unlock(&routes->lock); + + if (!dev) + return -ENOENT; + synchronize_rcu(); + dev_put(dev); + return 0; +} + +struct net_device *phonet_route_get_rcu(struct net *net, u8 daddr) +{ + struct phonet_net *pnn = phonet_pernet(net); + struct phonet_routes *routes = &pnn->routes; + struct net_device *dev; + + daddr >>= 2; + dev = rcu_dereference(routes->table[daddr]); + return dev; +} + +struct net_device *phonet_route_output(struct net *net, u8 daddr) +{ + struct phonet_net *pnn = phonet_pernet(net); + struct phonet_routes *routes = &pnn->routes; + struct net_device *dev; + + daddr >>= 2; + rcu_read_lock(); + dev = rcu_dereference(routes->table[daddr]); + dev_hold(dev); + rcu_read_unlock(); + + if (!dev) + dev = phonet_device_get(net); /* Default route */ + return dev; +} -- cgit v1.2.3