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/hsr/hsr_device.c | 561 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 561 insertions(+) create mode 100644 net/hsr/hsr_device.c (limited to 'net/hsr/hsr_device.c') diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c new file mode 100644 index 000000000..5a236aae2 --- /dev/null +++ b/net/hsr/hsr_device.c @@ -0,0 +1,561 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright 2011-2014 Autronica Fire and Security AS + * + * Author(s): + * 2011-2014 Arvid Brodin, arvid.brodin@alten.se + * This file contains device methods for creating, using and destroying + * virtual HSR or PRP devices. + */ + +#include +#include +#include +#include +#include +#include "hsr_device.h" +#include "hsr_slave.h" +#include "hsr_framereg.h" +#include "hsr_main.h" +#include "hsr_forward.h" + +static bool is_admin_up(struct net_device *dev) +{ + return dev && (dev->flags & IFF_UP); +} + +static bool is_slave_up(struct net_device *dev) +{ + return dev && is_admin_up(dev) && netif_oper_up(dev); +} + +static void __hsr_set_operstate(struct net_device *dev, int transition) +{ + write_lock(&dev_base_lock); + if (dev->operstate != transition) { + dev->operstate = transition; + write_unlock(&dev_base_lock); + netdev_state_change(dev); + } else { + write_unlock(&dev_base_lock); + } +} + +static void hsr_set_operstate(struct hsr_port *master, bool has_carrier) +{ + if (!is_admin_up(master->dev)) { + __hsr_set_operstate(master->dev, IF_OPER_DOWN); + return; + } + + if (has_carrier) + __hsr_set_operstate(master->dev, IF_OPER_UP); + else + __hsr_set_operstate(master->dev, IF_OPER_LOWERLAYERDOWN); +} + +static bool hsr_check_carrier(struct hsr_port *master) +{ + struct hsr_port *port; + + ASSERT_RTNL(); + + hsr_for_each_port(master->hsr, port) { + if (port->type != HSR_PT_MASTER && is_slave_up(port->dev)) { + netif_carrier_on(master->dev); + return true; + } + } + + netif_carrier_off(master->dev); + + return false; +} + +static void hsr_check_announce(struct net_device *hsr_dev, + unsigned char old_operstate) +{ + struct hsr_priv *hsr; + + hsr = netdev_priv(hsr_dev); + + if (hsr_dev->operstate == IF_OPER_UP && old_operstate != IF_OPER_UP) { + /* Went up */ + hsr->announce_count = 0; + mod_timer(&hsr->announce_timer, + jiffies + msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL)); + } + + if (hsr_dev->operstate != IF_OPER_UP && old_operstate == IF_OPER_UP) + /* Went down */ + del_timer(&hsr->announce_timer); +} + +void hsr_check_carrier_and_operstate(struct hsr_priv *hsr) +{ + struct hsr_port *master; + unsigned char old_operstate; + bool has_carrier; + + master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); + /* netif_stacked_transfer_operstate() cannot be used here since + * it doesn't set IF_OPER_LOWERLAYERDOWN (?) + */ + old_operstate = master->dev->operstate; + has_carrier = hsr_check_carrier(master); + hsr_set_operstate(master, has_carrier); + hsr_check_announce(master->dev, old_operstate); +} + +int hsr_get_max_mtu(struct hsr_priv *hsr) +{ + unsigned int mtu_max; + struct hsr_port *port; + + mtu_max = ETH_DATA_LEN; + hsr_for_each_port(hsr, port) + if (port->type != HSR_PT_MASTER) + mtu_max = min(port->dev->mtu, mtu_max); + + if (mtu_max < HSR_HLEN) + return 0; + return mtu_max - HSR_HLEN; +} + +static int hsr_dev_change_mtu(struct net_device *dev, int new_mtu) +{ + struct hsr_priv *hsr; + + hsr = netdev_priv(dev); + + if (new_mtu > hsr_get_max_mtu(hsr)) { + netdev_info(dev, "A HSR master's MTU cannot be greater than the smallest MTU of its slaves minus the HSR Tag length (%d octets).\n", + HSR_HLEN); + return -EINVAL; + } + + dev->mtu = new_mtu; + + return 0; +} + +static int hsr_dev_open(struct net_device *dev) +{ + struct hsr_priv *hsr; + struct hsr_port *port; + char designation; + + hsr = netdev_priv(dev); + designation = '\0'; + + hsr_for_each_port(hsr, port) { + if (port->type == HSR_PT_MASTER) + continue; + switch (port->type) { + case HSR_PT_SLAVE_A: + designation = 'A'; + break; + case HSR_PT_SLAVE_B: + designation = 'B'; + break; + default: + designation = '?'; + } + if (!is_slave_up(port->dev)) + netdev_warn(dev, "Slave %c (%s) is not up; please bring it up to get a fully working HSR network\n", + designation, port->dev->name); + } + + if (designation == '\0') + netdev_warn(dev, "No slave devices configured\n"); + + return 0; +} + +static int hsr_dev_close(struct net_device *dev) +{ + /* Nothing to do here. */ + return 0; +} + +static netdev_features_t hsr_features_recompute(struct hsr_priv *hsr, + netdev_features_t features) +{ + netdev_features_t mask; + struct hsr_port *port; + + mask = features; + + /* Mask out all features that, if supported by one device, should be + * enabled for all devices (see NETIF_F_ONE_FOR_ALL). + * + * Anything that's off in mask will not be enabled - so only things + * that were in features originally, and also is in NETIF_F_ONE_FOR_ALL, + * may become enabled. + */ + features &= ~NETIF_F_ONE_FOR_ALL; + hsr_for_each_port(hsr, port) + features = netdev_increment_features(features, + port->dev->features, + mask); + + return features; +} + +static netdev_features_t hsr_fix_features(struct net_device *dev, + netdev_features_t features) +{ + struct hsr_priv *hsr = netdev_priv(dev); + + return hsr_features_recompute(hsr, features); +} + +static netdev_tx_t hsr_dev_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct hsr_priv *hsr = netdev_priv(dev); + struct hsr_port *master; + + master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); + if (master) { + skb->dev = master->dev; + skb_reset_mac_header(skb); + skb_reset_mac_len(skb); + spin_lock_bh(&hsr->seqnr_lock); + hsr_forward_skb(skb, master); + spin_unlock_bh(&hsr->seqnr_lock); + } else { + dev_core_stats_tx_dropped_inc(dev); + dev_kfree_skb_any(skb); + } + return NETDEV_TX_OK; +} + +static const struct header_ops hsr_header_ops = { + .create = eth_header, + .parse = eth_header_parse, +}; + +static struct sk_buff *hsr_init_skb(struct hsr_port *master) +{ + struct hsr_priv *hsr = master->hsr; + struct sk_buff *skb; + int hlen, tlen; + + hlen = LL_RESERVED_SPACE(master->dev); + tlen = master->dev->needed_tailroom; + /* skb size is same for PRP/HSR frames, only difference + * being, for PRP it is a trailer and for HSR it is a + * header + */ + skb = dev_alloc_skb(sizeof(struct hsr_sup_tag) + + sizeof(struct hsr_sup_payload) + hlen + tlen); + + if (!skb) + return skb; + + skb_reserve(skb, hlen); + skb->dev = master->dev; + skb->priority = TC_PRIO_CONTROL; + + if (dev_hard_header(skb, skb->dev, ETH_P_PRP, + hsr->sup_multicast_addr, + skb->dev->dev_addr, skb->len) <= 0) + goto out; + + skb_reset_mac_header(skb); + skb_reset_mac_len(skb); + skb_reset_network_header(skb); + skb_reset_transport_header(skb); + + return skb; +out: + kfree_skb(skb); + + return NULL; +} + +static void send_hsr_supervision_frame(struct hsr_port *master, + unsigned long *interval) +{ + struct hsr_priv *hsr = master->hsr; + __u8 type = HSR_TLV_LIFE_CHECK; + struct hsr_sup_payload *hsr_sp; + struct hsr_sup_tag *hsr_stag; + struct sk_buff *skb; + + *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); + if (hsr->announce_count < 3 && hsr->prot_version == 0) { + type = HSR_TLV_ANNOUNCE; + *interval = msecs_to_jiffies(HSR_ANNOUNCE_INTERVAL); + hsr->announce_count++; + } + + skb = hsr_init_skb(master); + if (!skb) { + WARN_ONCE(1, "HSR: Could not send supervision frame\n"); + return; + } + + hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag)); + set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); + set_hsr_stag_HSR_ver(hsr_stag, hsr->prot_version); + + /* From HSRv1 on we have separate supervision sequence numbers. */ + spin_lock_bh(&hsr->seqnr_lock); + if (hsr->prot_version > 0) { + hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); + hsr->sup_sequence_nr++; + } else { + hsr_stag->sequence_nr = htons(hsr->sequence_nr); + hsr->sequence_nr++; + } + + hsr_stag->tlv.HSR_TLV_type = type; + /* TODO: Why 12 in HSRv0? */ + hsr_stag->tlv.HSR_TLV_length = hsr->prot_version ? + sizeof(struct hsr_sup_payload) : 12; + + /* Payload: MacAddressA */ + hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); + ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr); + + if (skb_put_padto(skb, ETH_ZLEN)) { + spin_unlock_bh(&hsr->seqnr_lock); + return; + } + + hsr_forward_skb(skb, master); + spin_unlock_bh(&hsr->seqnr_lock); + return; +} + +static void send_prp_supervision_frame(struct hsr_port *master, + unsigned long *interval) +{ + struct hsr_priv *hsr = master->hsr; + struct hsr_sup_payload *hsr_sp; + struct hsr_sup_tag *hsr_stag; + struct sk_buff *skb; + + skb = hsr_init_skb(master); + if (!skb) { + WARN_ONCE(1, "PRP: Could not send supervision frame\n"); + return; + } + + *interval = msecs_to_jiffies(HSR_LIFE_CHECK_INTERVAL); + hsr_stag = skb_put(skb, sizeof(struct hsr_sup_tag)); + set_hsr_stag_path(hsr_stag, (hsr->prot_version ? 0x0 : 0xf)); + set_hsr_stag_HSR_ver(hsr_stag, (hsr->prot_version ? 1 : 0)); + + /* From HSRv1 on we have separate supervision sequence numbers. */ + spin_lock_bh(&hsr->seqnr_lock); + hsr_stag->sequence_nr = htons(hsr->sup_sequence_nr); + hsr->sup_sequence_nr++; + hsr_stag->tlv.HSR_TLV_type = PRP_TLV_LIFE_CHECK_DD; + hsr_stag->tlv.HSR_TLV_length = sizeof(struct hsr_sup_payload); + + /* Payload: MacAddressA */ + hsr_sp = skb_put(skb, sizeof(struct hsr_sup_payload)); + ether_addr_copy(hsr_sp->macaddress_A, master->dev->dev_addr); + + if (skb_put_padto(skb, ETH_ZLEN)) { + spin_unlock_bh(&hsr->seqnr_lock); + return; + } + + hsr_forward_skb(skb, master); + spin_unlock_bh(&hsr->seqnr_lock); +} + +/* Announce (supervision frame) timer function + */ +static void hsr_announce(struct timer_list *t) +{ + struct hsr_priv *hsr; + struct hsr_port *master; + unsigned long interval; + + hsr = from_timer(hsr, t, announce_timer); + + rcu_read_lock(); + master = hsr_port_get_hsr(hsr, HSR_PT_MASTER); + hsr->proto_ops->send_sv_frame(master, &interval); + + if (is_admin_up(master->dev)) + mod_timer(&hsr->announce_timer, jiffies + interval); + + rcu_read_unlock(); +} + +void hsr_del_ports(struct hsr_priv *hsr) +{ + struct hsr_port *port; + + port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_A); + if (port) + hsr_del_port(port); + + port = hsr_port_get_hsr(hsr, HSR_PT_SLAVE_B); + if (port) + hsr_del_port(port); + + port = hsr_port_get_hsr(hsr, HSR_PT_MASTER); + if (port) + hsr_del_port(port); +} + +static const struct net_device_ops hsr_device_ops = { + .ndo_change_mtu = hsr_dev_change_mtu, + .ndo_open = hsr_dev_open, + .ndo_stop = hsr_dev_close, + .ndo_start_xmit = hsr_dev_xmit, + .ndo_fix_features = hsr_fix_features, +}; + +static struct device_type hsr_type = { + .name = "hsr", +}; + +static struct hsr_proto_ops hsr_ops = { + .send_sv_frame = send_hsr_supervision_frame, + .create_tagged_frame = hsr_create_tagged_frame, + .get_untagged_frame = hsr_get_untagged_frame, + .drop_frame = hsr_drop_frame, + .fill_frame_info = hsr_fill_frame_info, + .invalid_dan_ingress_frame = hsr_invalid_dan_ingress_frame, +}; + +static struct hsr_proto_ops prp_ops = { + .send_sv_frame = send_prp_supervision_frame, + .create_tagged_frame = prp_create_tagged_frame, + .get_untagged_frame = prp_get_untagged_frame, + .drop_frame = prp_drop_frame, + .fill_frame_info = prp_fill_frame_info, + .handle_san_frame = prp_handle_san_frame, + .update_san_info = prp_update_san_info, +}; + +void hsr_dev_setup(struct net_device *dev) +{ + eth_hw_addr_random(dev); + + ether_setup(dev); + dev->min_mtu = 0; + dev->header_ops = &hsr_header_ops; + dev->netdev_ops = &hsr_device_ops; + SET_NETDEV_DEVTYPE(dev, &hsr_type); + dev->priv_flags |= IFF_NO_QUEUE | IFF_DISABLE_NETPOLL; + + dev->needs_free_netdev = true; + + dev->hw_features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | + NETIF_F_GSO_MASK | NETIF_F_HW_CSUM | + NETIF_F_HW_VLAN_CTAG_TX; + + dev->features = dev->hw_features; + + /* Prevent recursive tx locking */ + dev->features |= NETIF_F_LLTX; + /* VLAN on top of HSR needs testing and probably some work on + * hsr_header_create() etc. + */ + dev->features |= NETIF_F_VLAN_CHALLENGED; + /* Not sure about this. Taken from bridge code. netdev_features.h says + * it means "Does not change network namespaces". + */ + dev->features |= NETIF_F_NETNS_LOCAL; +} + +/* Return true if dev is a HSR master; return false otherwise. + */ +bool is_hsr_master(struct net_device *dev) +{ + return (dev->netdev_ops->ndo_start_xmit == hsr_dev_xmit); +} +EXPORT_SYMBOL(is_hsr_master); + +/* Default multicast address for HSR Supervision frames */ +static const unsigned char def_multicast_addr[ETH_ALEN] __aligned(2) = { + 0x01, 0x15, 0x4e, 0x00, 0x01, 0x00 +}; + +int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2], + unsigned char multicast_spec, u8 protocol_version, + struct netlink_ext_ack *extack) +{ + bool unregister = false; + struct hsr_priv *hsr; + int res; + + hsr = netdev_priv(hsr_dev); + INIT_LIST_HEAD(&hsr->ports); + INIT_LIST_HEAD(&hsr->node_db); + spin_lock_init(&hsr->list_lock); + + eth_hw_addr_set(hsr_dev, slave[0]->dev_addr); + + /* initialize protocol specific functions */ + if (protocol_version == PRP_V1) { + /* For PRP, lan_id has most significant 3 bits holding + * the net_id of PRP_LAN_ID + */ + hsr->net_id = PRP_LAN_ID << 1; + hsr->proto_ops = &prp_ops; + } else { + hsr->proto_ops = &hsr_ops; + } + + /* Make sure we recognize frames from ourselves in hsr_rcv() */ + res = hsr_create_self_node(hsr, hsr_dev->dev_addr, + slave[1]->dev_addr); + if (res < 0) + return res; + + spin_lock_init(&hsr->seqnr_lock); + /* Overflow soon to find bugs easier: */ + hsr->sequence_nr = HSR_SEQNR_START; + hsr->sup_sequence_nr = HSR_SUP_SEQNR_START; + + timer_setup(&hsr->announce_timer, hsr_announce, 0); + timer_setup(&hsr->prune_timer, hsr_prune_nodes, 0); + + ether_addr_copy(hsr->sup_multicast_addr, def_multicast_addr); + hsr->sup_multicast_addr[ETH_ALEN - 1] = multicast_spec; + + hsr->prot_version = protocol_version; + + /* Make sure the 1st call to netif_carrier_on() gets through */ + netif_carrier_off(hsr_dev); + + res = hsr_add_port(hsr, hsr_dev, HSR_PT_MASTER, extack); + if (res) + goto err_add_master; + + res = register_netdevice(hsr_dev); + if (res) + goto err_unregister; + + unregister = true; + + res = hsr_add_port(hsr, slave[0], HSR_PT_SLAVE_A, extack); + if (res) + goto err_unregister; + + res = hsr_add_port(hsr, slave[1], HSR_PT_SLAVE_B, extack); + if (res) + goto err_unregister; + + hsr_debugfs_init(hsr, hsr_dev); + mod_timer(&hsr->prune_timer, jiffies + msecs_to_jiffies(PRUNE_PERIOD)); + + return 0; + +err_unregister: + hsr_del_ports(hsr); +err_add_master: + hsr_del_self_node(hsr); + + if (unregister) + unregister_netdevice(hsr_dev); + return res; +} -- cgit v1.2.3