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/ax25/ax25_route.c | 488 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 488 insertions(+) create mode 100644 net/ax25/ax25_route.c (limited to 'net/ax25/ax25_route.c') diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c new file mode 100644 index 000000000..b7c4d656a --- /dev/null +++ b/net/ax25/ax25_route.c @@ -0,0 +1,488 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk) + * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk) + * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org) + * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de) + * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de) + * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr) + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static ax25_route *ax25_route_list; +DEFINE_RWLOCK(ax25_route_lock); + +void ax25_rt_device_down(struct net_device *dev) +{ + ax25_route *s, *t, *ax25_rt; + + write_lock_bh(&ax25_route_lock); + ax25_rt = ax25_route_list; + while (ax25_rt != NULL) { + s = ax25_rt; + ax25_rt = ax25_rt->next; + + if (s->dev == dev) { + if (ax25_route_list == s) { + ax25_route_list = s->next; + kfree(s->digipeat); + kfree(s); + } else { + for (t = ax25_route_list; t != NULL; t = t->next) { + if (t->next == s) { + t->next = s->next; + kfree(s->digipeat); + kfree(s); + break; + } + } + } + } + } + write_unlock_bh(&ax25_route_lock); +} + +static int __must_check ax25_rt_add(struct ax25_routes_struct *route) +{ + ax25_route *ax25_rt; + ax25_dev *ax25_dev; + int i; + + if (route->digi_count > AX25_MAX_DIGIS) + return -EINVAL; + + ax25_dev = ax25_addr_ax25dev(&route->port_addr); + if (!ax25_dev) + return -EINVAL; + + write_lock_bh(&ax25_route_lock); + + ax25_rt = ax25_route_list; + while (ax25_rt != NULL) { + if (ax25cmp(&ax25_rt->callsign, &route->dest_addr) == 0 && + ax25_rt->dev == ax25_dev->dev) { + kfree(ax25_rt->digipeat); + ax25_rt->digipeat = NULL; + if (route->digi_count != 0) { + if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) { + write_unlock_bh(&ax25_route_lock); + ax25_dev_put(ax25_dev); + return -ENOMEM; + } + ax25_rt->digipeat->lastrepeat = -1; + ax25_rt->digipeat->ndigi = route->digi_count; + for (i = 0; i < route->digi_count; i++) { + ax25_rt->digipeat->repeated[i] = 0; + ax25_rt->digipeat->calls[i] = route->digi_addr[i]; + } + } + write_unlock_bh(&ax25_route_lock); + ax25_dev_put(ax25_dev); + return 0; + } + ax25_rt = ax25_rt->next; + } + + if ((ax25_rt = kmalloc(sizeof(ax25_route), GFP_ATOMIC)) == NULL) { + write_unlock_bh(&ax25_route_lock); + ax25_dev_put(ax25_dev); + return -ENOMEM; + } + + ax25_rt->callsign = route->dest_addr; + ax25_rt->dev = ax25_dev->dev; + ax25_rt->digipeat = NULL; + ax25_rt->ip_mode = ' '; + if (route->digi_count != 0) { + if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) { + write_unlock_bh(&ax25_route_lock); + kfree(ax25_rt); + ax25_dev_put(ax25_dev); + return -ENOMEM; + } + ax25_rt->digipeat->lastrepeat = -1; + ax25_rt->digipeat->ndigi = route->digi_count; + for (i = 0; i < route->digi_count; i++) { + ax25_rt->digipeat->repeated[i] = 0; + ax25_rt->digipeat->calls[i] = route->digi_addr[i]; + } + } + ax25_rt->next = ax25_route_list; + ax25_route_list = ax25_rt; + write_unlock_bh(&ax25_route_lock); + ax25_dev_put(ax25_dev); + + return 0; +} + +void __ax25_put_route(ax25_route *ax25_rt) +{ + kfree(ax25_rt->digipeat); + kfree(ax25_rt); +} + +static int ax25_rt_del(struct ax25_routes_struct *route) +{ + ax25_route *s, *t, *ax25_rt; + ax25_dev *ax25_dev; + + if ((ax25_dev = ax25_addr_ax25dev(&route->port_addr)) == NULL) + return -EINVAL; + + write_lock_bh(&ax25_route_lock); + + ax25_rt = ax25_route_list; + while (ax25_rt != NULL) { + s = ax25_rt; + ax25_rt = ax25_rt->next; + if (s->dev == ax25_dev->dev && + ax25cmp(&route->dest_addr, &s->callsign) == 0) { + if (ax25_route_list == s) { + ax25_route_list = s->next; + __ax25_put_route(s); + } else { + for (t = ax25_route_list; t != NULL; t = t->next) { + if (t->next == s) { + t->next = s->next; + __ax25_put_route(s); + break; + } + } + } + } + } + write_unlock_bh(&ax25_route_lock); + ax25_dev_put(ax25_dev); + + return 0; +} + +static int ax25_rt_opt(struct ax25_route_opt_struct *rt_option) +{ + ax25_route *ax25_rt; + ax25_dev *ax25_dev; + int err = 0; + + if ((ax25_dev = ax25_addr_ax25dev(&rt_option->port_addr)) == NULL) + return -EINVAL; + + write_lock_bh(&ax25_route_lock); + + ax25_rt = ax25_route_list; + while (ax25_rt != NULL) { + if (ax25_rt->dev == ax25_dev->dev && + ax25cmp(&rt_option->dest_addr, &ax25_rt->callsign) == 0) { + switch (rt_option->cmd) { + case AX25_SET_RT_IPMODE: + switch (rt_option->arg) { + case ' ': + case 'D': + case 'V': + ax25_rt->ip_mode = rt_option->arg; + break; + default: + err = -EINVAL; + goto out; + } + break; + default: + err = -EINVAL; + goto out; + } + } + ax25_rt = ax25_rt->next; + } + +out: + write_unlock_bh(&ax25_route_lock); + ax25_dev_put(ax25_dev); + return err; +} + +int ax25_rt_ioctl(unsigned int cmd, void __user *arg) +{ + struct ax25_route_opt_struct rt_option; + struct ax25_routes_struct route; + + switch (cmd) { + case SIOCADDRT: + if (copy_from_user(&route, arg, sizeof(route))) + return -EFAULT; + return ax25_rt_add(&route); + + case SIOCDELRT: + if (copy_from_user(&route, arg, sizeof(route))) + return -EFAULT; + return ax25_rt_del(&route); + + case SIOCAX25OPTRT: + if (copy_from_user(&rt_option, arg, sizeof(rt_option))) + return -EFAULT; + return ax25_rt_opt(&rt_option); + + default: + return -EINVAL; + } +} + +#ifdef CONFIG_PROC_FS + +static void *ax25_rt_seq_start(struct seq_file *seq, loff_t *pos) + __acquires(ax25_route_lock) +{ + struct ax25_route *ax25_rt; + int i = 1; + + read_lock(&ax25_route_lock); + if (*pos == 0) + return SEQ_START_TOKEN; + + for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) { + if (i == *pos) + return ax25_rt; + ++i; + } + + return NULL; +} + +static void *ax25_rt_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + return (v == SEQ_START_TOKEN) ? ax25_route_list : + ((struct ax25_route *) v)->next; +} + +static void ax25_rt_seq_stop(struct seq_file *seq, void *v) + __releases(ax25_route_lock) +{ + read_unlock(&ax25_route_lock); +} + +static int ax25_rt_seq_show(struct seq_file *seq, void *v) +{ + char buf[11]; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, "callsign dev mode digipeaters\n"); + else { + struct ax25_route *ax25_rt = v; + const char *callsign; + int i; + + if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0) + callsign = "default"; + else + callsign = ax2asc(buf, &ax25_rt->callsign); + + seq_printf(seq, "%-9s %-4s", + callsign, + ax25_rt->dev ? ax25_rt->dev->name : "???"); + + switch (ax25_rt->ip_mode) { + case 'V': + seq_puts(seq, " vc"); + break; + case 'D': + seq_puts(seq, " dg"); + break; + default: + seq_puts(seq, " *"); + break; + } + + if (ax25_rt->digipeat != NULL) + for (i = 0; i < ax25_rt->digipeat->ndigi; i++) + seq_printf(seq, " %s", + ax2asc(buf, &ax25_rt->digipeat->calls[i])); + + seq_puts(seq, "\n"); + } + return 0; +} + +const struct seq_operations ax25_rt_seqops = { + .start = ax25_rt_seq_start, + .next = ax25_rt_seq_next, + .stop = ax25_rt_seq_stop, + .show = ax25_rt_seq_show, +}; +#endif + +/* + * Find AX.25 route + * + * Only routes with a reference count of zero can be destroyed. + * Must be called with ax25_route_lock read locked. + */ +ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev) +{ + ax25_route *ax25_spe_rt = NULL; + ax25_route *ax25_def_rt = NULL; + ax25_route *ax25_rt; + + /* + * Bind to the physical interface we heard them on, or the default + * route if none is found; + */ + for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) { + if (dev == NULL) { + if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL) + ax25_spe_rt = ax25_rt; + if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL) + ax25_def_rt = ax25_rt; + } else { + if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev) + ax25_spe_rt = ax25_rt; + if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev) + ax25_def_rt = ax25_rt; + } + } + + ax25_rt = ax25_def_rt; + if (ax25_spe_rt != NULL) + ax25_rt = ax25_spe_rt; + + return ax25_rt; +} + +/* + * Adjust path: If you specify a default route and want to connect + * a target on the digipeater path but w/o having a special route + * set before, the path has to be truncated from your target on. + */ +static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat) +{ + int k; + + for (k = 0; k < digipeat->ndigi; k++) { + if (ax25cmp(addr, &digipeat->calls[k]) == 0) + break; + } + + digipeat->ndigi = k; +} + + +/* + * Find which interface to use. + */ +int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr) +{ + ax25_uid_assoc *user; + ax25_route *ax25_rt; + int err = 0; + + ax25_route_lock_use(); + ax25_rt = ax25_get_route(addr, NULL); + if (!ax25_rt) { + ax25_route_lock_unuse(); + return -EHOSTUNREACH; + } + if ((ax25->ax25_dev = ax25_dev_ax25dev(ax25_rt->dev)) == NULL) { + err = -EHOSTUNREACH; + goto put; + } + + user = ax25_findbyuid(current_euid()); + if (user) { + ax25->source_addr = user->call; + ax25_uid_put(user); + } else { + if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) { + err = -EPERM; + goto put; + } + ax25->source_addr = *(ax25_address *)ax25->ax25_dev->dev->dev_addr; + } + + if (ax25_rt->digipeat != NULL) { + ax25->digipeat = kmemdup(ax25_rt->digipeat, sizeof(ax25_digi), + GFP_ATOMIC); + if (ax25->digipeat == NULL) { + err = -ENOMEM; + goto put; + } + ax25_adjust_path(addr, ax25->digipeat); + } + + if (ax25->sk != NULL) { + local_bh_disable(); + bh_lock_sock(ax25->sk); + sock_reset_flag(ax25->sk, SOCK_ZAPPED); + bh_unlock_sock(ax25->sk); + local_bh_enable(); + } + +put: + ax25_route_lock_unuse(); + return err; +} + +struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src, + ax25_address *dest, ax25_digi *digi) +{ + unsigned char *bp; + int len; + + len = digi->ndigi * AX25_ADDR_LEN; + + if (unlikely(skb_headroom(skb) < len)) { + skb = skb_expand_head(skb, len); + if (!skb) { + printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n"); + return NULL; + } + } + + bp = skb_push(skb, len); + + ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS); + + return skb; +} + +/* + * Free all memory associated with routing structures. + */ +void __exit ax25_rt_free(void) +{ + ax25_route *s, *ax25_rt = ax25_route_list; + + write_lock_bh(&ax25_route_lock); + while (ax25_rt != NULL) { + s = ax25_rt; + ax25_rt = ax25_rt->next; + + kfree(s->digipeat); + kfree(s); + } + write_unlock_bh(&ax25_route_lock); +} -- cgit v1.2.3