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(). ... --- include/net/route.h | 402 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 402 insertions(+) create mode 100644 include/net/route.h (limited to 'include/net/route.h') diff --git a/include/net/route.h b/include/net/route.h new file mode 100644 index 000000000..fe00b0a2e --- /dev/null +++ b/include/net/route.h @@ -0,0 +1,402 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * INET An implementation of the TCP/IP protocol suite for the LINUX + * operating system. INET is implemented using the BSD Socket + * interface as the means of communication with the user level. + * + * Definitions for the IP router. + * + * Version: @(#)route.h 1.0.4 05/27/93 + * + * Authors: Ross Biro + * Fred N. van Kempen, + * Fixes: + * Alan Cox : Reformatted. Added ip_rt_local() + * Alan Cox : Support for TCP parameters. + * Alexey Kuznetsov: Major changes for new routing code. + * Mike McLagan : Routing by source + * Robert Olsson : Added rt_cache statistics + */ +#ifndef _ROUTE_H +#define _ROUTE_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define RTO_ONLINK 0x01 + +#define RT_CONN_FLAGS(sk) (RT_TOS(inet_sk(sk)->tos) | sock_flag(sk, SOCK_LOCALROUTE)) +#define RT_CONN_FLAGS_TOS(sk,tos) (RT_TOS(tos) | sock_flag(sk, SOCK_LOCALROUTE)) + +static inline __u8 ip_sock_rt_scope(const struct sock *sk) +{ + if (sock_flag(sk, SOCK_LOCALROUTE)) + return RT_SCOPE_LINK; + + return RT_SCOPE_UNIVERSE; +} + +static inline __u8 ip_sock_rt_tos(const struct sock *sk) +{ + return RT_TOS(inet_sk(sk)->tos); +} + +struct ip_tunnel_info; +struct fib_nh; +struct fib_info; +struct uncached_list; +struct rtable { + struct dst_entry dst; + + int rt_genid; + unsigned int rt_flags; + __u16 rt_type; + __u8 rt_is_input; + __u8 rt_uses_gateway; + + int rt_iif; + + u8 rt_gw_family; + /* Info on neighbour */ + union { + __be32 rt_gw4; + struct in6_addr rt_gw6; + }; + + /* Miscellaneous cached information */ + u32 rt_mtu_locked:1, + rt_pmtu:31; + + struct list_head rt_uncached; + struct uncached_list *rt_uncached_list; +}; + +static inline bool rt_is_input_route(const struct rtable *rt) +{ + return rt->rt_is_input != 0; +} + +static inline bool rt_is_output_route(const struct rtable *rt) +{ + return rt->rt_is_input == 0; +} + +static inline __be32 rt_nexthop(const struct rtable *rt, __be32 daddr) +{ + if (rt->rt_gw_family == AF_INET) + return rt->rt_gw4; + return daddr; +} + +struct ip_rt_acct { + __u32 o_bytes; + __u32 o_packets; + __u32 i_bytes; + __u32 i_packets; +}; + +struct rt_cache_stat { + unsigned int in_slow_tot; + unsigned int in_slow_mc; + unsigned int in_no_route; + unsigned int in_brd; + unsigned int in_martian_dst; + unsigned int in_martian_src; + unsigned int out_slow_tot; + unsigned int out_slow_mc; +}; + +extern struct ip_rt_acct __percpu *ip_rt_acct; + +struct in_device; + +int ip_rt_init(void); +void rt_cache_flush(struct net *net); +void rt_flush_dev(struct net_device *dev); +struct rtable *ip_route_output_key_hash(struct net *net, struct flowi4 *flp, + const struct sk_buff *skb); +struct rtable *ip_route_output_key_hash_rcu(struct net *net, struct flowi4 *flp, + struct fib_result *res, + const struct sk_buff *skb); + +static inline struct rtable *__ip_route_output_key(struct net *net, + struct flowi4 *flp) +{ + return ip_route_output_key_hash(net, flp, NULL); +} + +struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp, + const struct sock *sk); +struct rtable *ip_route_output_tunnel(struct sk_buff *skb, + struct net_device *dev, + struct net *net, __be32 *saddr, + const struct ip_tunnel_info *info, + u8 protocol, bool use_cache); + +struct dst_entry *ipv4_blackhole_route(struct net *net, + struct dst_entry *dst_orig); + +static inline struct rtable *ip_route_output_key(struct net *net, struct flowi4 *flp) +{ + return ip_route_output_flow(net, flp, NULL); +} + +static inline struct rtable *ip_route_output(struct net *net, __be32 daddr, + __be32 saddr, u8 tos, int oif) +{ + struct flowi4 fl4 = { + .flowi4_oif = oif, + .flowi4_tos = tos, + .daddr = daddr, + .saddr = saddr, + }; + return ip_route_output_key(net, &fl4); +} + +static inline struct rtable *ip_route_output_ports(struct net *net, struct flowi4 *fl4, + struct sock *sk, + __be32 daddr, __be32 saddr, + __be16 dport, __be16 sport, + __u8 proto, __u8 tos, int oif) +{ + flowi4_init_output(fl4, oif, sk ? sk->sk_mark : 0, tos, + RT_SCOPE_UNIVERSE, proto, + sk ? inet_sk_flowi_flags(sk) : 0, + daddr, saddr, dport, sport, sock_net_uid(net, sk)); + if (sk) + security_sk_classify_flow(sk, flowi4_to_flowi_common(fl4)); + return ip_route_output_flow(net, fl4, sk); +} + +static inline struct rtable *ip_route_output_gre(struct net *net, struct flowi4 *fl4, + __be32 daddr, __be32 saddr, + __be32 gre_key, __u8 tos, int oif) +{ + memset(fl4, 0, sizeof(*fl4)); + fl4->flowi4_oif = oif; + fl4->daddr = daddr; + fl4->saddr = saddr; + fl4->flowi4_tos = tos; + fl4->flowi4_proto = IPPROTO_GRE; + fl4->fl4_gre_key = gre_key; + return ip_route_output_key(net, fl4); +} +int ip_mc_validate_source(struct sk_buff *skb, __be32 daddr, __be32 saddr, + u8 tos, struct net_device *dev, + struct in_device *in_dev, u32 *itag); +int ip_route_input_noref(struct sk_buff *skb, __be32 dst, __be32 src, + u8 tos, struct net_device *devin); +int ip_route_use_hint(struct sk_buff *skb, __be32 dst, __be32 src, + u8 tos, struct net_device *devin, + const struct sk_buff *hint); + +static inline int ip_route_input(struct sk_buff *skb, __be32 dst, __be32 src, + u8 tos, struct net_device *devin) +{ + int err; + + rcu_read_lock(); + err = ip_route_input_noref(skb, dst, src, tos, devin); + if (!err) { + skb_dst_force(skb); + if (!skb_dst(skb)) + err = -EINVAL; + } + rcu_read_unlock(); + + return err; +} + +void ipv4_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu, int oif, + u8 protocol); +void ipv4_sk_update_pmtu(struct sk_buff *skb, struct sock *sk, u32 mtu); +void ipv4_redirect(struct sk_buff *skb, struct net *net, int oif, u8 protocol); +void ipv4_sk_redirect(struct sk_buff *skb, struct sock *sk); +void ip_rt_send_redirect(struct sk_buff *skb); + +unsigned int inet_addr_type(struct net *net, __be32 addr); +unsigned int inet_addr_type_table(struct net *net, __be32 addr, u32 tb_id); +unsigned int inet_dev_addr_type(struct net *net, const struct net_device *dev, + __be32 addr); +unsigned int inet_addr_type_dev_table(struct net *net, + const struct net_device *dev, + __be32 addr); +void ip_rt_multicast_event(struct in_device *); +int ip_rt_ioctl(struct net *, unsigned int cmd, struct rtentry *rt); +void ip_rt_get_source(u8 *src, struct sk_buff *skb, struct rtable *rt); +struct rtable *rt_dst_alloc(struct net_device *dev, + unsigned int flags, u16 type, bool noxfrm); +struct rtable *rt_dst_clone(struct net_device *dev, struct rtable *rt); + +struct in_ifaddr; +void fib_add_ifaddr(struct in_ifaddr *); +void fib_del_ifaddr(struct in_ifaddr *, struct in_ifaddr *); +void fib_modify_prefix_metric(struct in_ifaddr *ifa, u32 new_metric); + +void rt_add_uncached_list(struct rtable *rt); +void rt_del_uncached_list(struct rtable *rt); + +int fib_dump_info_fnhe(struct sk_buff *skb, struct netlink_callback *cb, + u32 table_id, struct fib_info *fi, + int *fa_index, int fa_start, unsigned int flags); + +static inline void ip_rt_put(struct rtable *rt) +{ + /* dst_release() accepts a NULL parameter. + * We rely on dst being first structure in struct rtable + */ + BUILD_BUG_ON(offsetof(struct rtable, dst) != 0); + dst_release(&rt->dst); +} + +#define IPTOS_RT_MASK (IPTOS_TOS_MASK & ~3) + +extern const __u8 ip_tos2prio[16]; + +static inline char rt_tos2priority(u8 tos) +{ + return ip_tos2prio[IPTOS_TOS(tos)>>1]; +} + +/* ip_route_connect() and ip_route_newports() work in tandem whilst + * binding a socket for a new outgoing connection. + * + * In order to use IPSEC properly, we must, in the end, have a + * route that was looked up using all available keys including source + * and destination ports. + * + * However, if a source port needs to be allocated (the user specified + * a wildcard source port) we need to obtain addressing information + * in order to perform that allocation. + * + * So ip_route_connect() looks up a route using wildcarded source and + * destination ports in the key, simply so that we can get a pair of + * addresses to use for port allocation. + * + * Later, once the ports are allocated, ip_route_newports() will make + * another route lookup if needed to make sure we catch any IPSEC + * rules keyed on the port information. + * + * The callers allocate the flow key on their stack, and must pass in + * the same flowi4 object to both the ip_route_connect() and the + * ip_route_newports() calls. + */ + +static inline void ip_route_connect_init(struct flowi4 *fl4, __be32 dst, + __be32 src, int oif, u8 protocol, + __be16 sport, __be16 dport, + const struct sock *sk) +{ + __u8 flow_flags = 0; + + if (inet_sk(sk)->transparent) + flow_flags |= FLOWI_FLAG_ANYSRC; + + flowi4_init_output(fl4, oif, sk->sk_mark, ip_sock_rt_tos(sk), + ip_sock_rt_scope(sk), protocol, flow_flags, dst, + src, dport, sport, sk->sk_uid); +} + +static inline struct rtable *ip_route_connect(struct flowi4 *fl4, __be32 dst, + __be32 src, int oif, u8 protocol, + __be16 sport, __be16 dport, + struct sock *sk) +{ + struct net *net = sock_net(sk); + struct rtable *rt; + + ip_route_connect_init(fl4, dst, src, oif, protocol, sport, dport, sk); + + if (!dst || !src) { + rt = __ip_route_output_key(net, fl4); + if (IS_ERR(rt)) + return rt; + ip_rt_put(rt); + flowi4_update_output(fl4, oif, fl4->flowi4_tos, fl4->daddr, + fl4->saddr); + } + security_sk_classify_flow(sk, flowi4_to_flowi_common(fl4)); + return ip_route_output_flow(net, fl4, sk); +} + +static inline struct rtable *ip_route_newports(struct flowi4 *fl4, struct rtable *rt, + __be16 orig_sport, __be16 orig_dport, + __be16 sport, __be16 dport, + struct sock *sk) +{ + if (sport != orig_sport || dport != orig_dport) { + fl4->fl4_dport = dport; + fl4->fl4_sport = sport; + ip_rt_put(rt); + flowi4_update_output(fl4, sk->sk_bound_dev_if, + RT_CONN_FLAGS(sk), fl4->daddr, + fl4->saddr); + security_sk_classify_flow(sk, flowi4_to_flowi_common(fl4)); + return ip_route_output_flow(sock_net(sk), fl4, sk); + } + return rt; +} + +static inline int inet_iif(const struct sk_buff *skb) +{ + struct rtable *rt = skb_rtable(skb); + + if (rt && rt->rt_iif) + return rt->rt_iif; + + return skb->skb_iif; +} + +static inline int ip4_dst_hoplimit(const struct dst_entry *dst) +{ + int hoplimit = dst_metric_raw(dst, RTAX_HOPLIMIT); + struct net *net = dev_net(dst->dev); + + if (hoplimit == 0) + hoplimit = READ_ONCE(net->ipv4.sysctl_ip_default_ttl); + return hoplimit; +} + +static inline struct neighbour *ip_neigh_gw4(struct net_device *dev, + __be32 daddr) +{ + struct neighbour *neigh; + + neigh = __ipv4_neigh_lookup_noref(dev, (__force u32)daddr); + if (unlikely(!neigh)) + neigh = __neigh_create(&arp_tbl, &daddr, dev, false); + + return neigh; +} + +static inline struct neighbour *ip_neigh_for_gw(struct rtable *rt, + struct sk_buff *skb, + bool *is_v6gw) +{ + struct net_device *dev = rt->dst.dev; + struct neighbour *neigh; + + if (likely(rt->rt_gw_family == AF_INET)) { + neigh = ip_neigh_gw4(dev, rt->rt_gw4); + } else if (rt->rt_gw_family == AF_INET6) { + neigh = ip_neigh_gw6(dev, &rt->rt_gw6); + *is_v6gw = true; + } else { + neigh = ip_neigh_gw4(dev, ip_hdr(skb)->daddr); + } + return neigh; +} + +#endif /* _ROUTE_H */ -- cgit v1.2.3