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(). ... --- drivers/net/netdevsim/ipsec.c | 304 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 304 insertions(+) create mode 100644 drivers/net/netdevsim/ipsec.c (limited to 'drivers/net/netdevsim/ipsec.c') diff --git a/drivers/net/netdevsim/ipsec.c b/drivers/net/netdevsim/ipsec.c new file mode 100644 index 000000000..f0d58092e --- /dev/null +++ b/drivers/net/netdevsim/ipsec.c @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2018 Oracle and/or its affiliates. All rights reserved. */ + +#include +#include +#include + +#include "netdevsim.h" + +#define NSIM_IPSEC_AUTH_BITS 128 + +static ssize_t nsim_dbg_netdev_ops_read(struct file *filp, + char __user *buffer, + size_t count, loff_t *ppos) +{ + struct netdevsim *ns = filp->private_data; + struct nsim_ipsec *ipsec = &ns->ipsec; + size_t bufsize; + char *buf, *p; + int len; + int i; + + /* the buffer needed is + * (num SAs * 3 lines each * ~60 bytes per line) + one more line + */ + bufsize = (ipsec->count * 4 * 60) + 60; + buf = kzalloc(bufsize, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + p = buf; + p += scnprintf(p, bufsize - (p - buf), + "SA count=%u tx=%u\n", + ipsec->count, ipsec->tx); + + for (i = 0; i < NSIM_IPSEC_MAX_SA_COUNT; i++) { + struct nsim_sa *sap = &ipsec->sa[i]; + + if (!sap->used) + continue; + + p += scnprintf(p, bufsize - (p - buf), + "sa[%i] %cx ipaddr=0x%08x %08x %08x %08x\n", + i, (sap->rx ? 'r' : 't'), sap->ipaddr[0], + sap->ipaddr[1], sap->ipaddr[2], sap->ipaddr[3]); + p += scnprintf(p, bufsize - (p - buf), + "sa[%i] spi=0x%08x proto=0x%x salt=0x%08x crypt=%d\n", + i, be32_to_cpu(sap->xs->id.spi), + sap->xs->id.proto, sap->salt, sap->crypt); + p += scnprintf(p, bufsize - (p - buf), + "sa[%i] key=0x%08x %08x %08x %08x\n", + i, sap->key[0], sap->key[1], + sap->key[2], sap->key[3]); + } + + len = simple_read_from_buffer(buffer, count, ppos, buf, p - buf); + + kfree(buf); + return len; +} + +static const struct file_operations ipsec_dbg_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = nsim_dbg_netdev_ops_read, +}; + +static int nsim_ipsec_find_empty_idx(struct nsim_ipsec *ipsec) +{ + u32 i; + + if (ipsec->count == NSIM_IPSEC_MAX_SA_COUNT) + return -ENOSPC; + + /* search sa table */ + for (i = 0; i < NSIM_IPSEC_MAX_SA_COUNT; i++) { + if (!ipsec->sa[i].used) + return i; + } + + return -ENOSPC; +} + +static int nsim_ipsec_parse_proto_keys(struct xfrm_state *xs, + u32 *mykey, u32 *mysalt) +{ + const char aes_gcm_name[] = "rfc4106(gcm(aes))"; + struct net_device *dev = xs->xso.real_dev; + unsigned char *key_data; + char *alg_name = NULL; + int key_len; + + if (!xs->aead) { + netdev_err(dev, "Unsupported IPsec algorithm\n"); + return -EINVAL; + } + + if (xs->aead->alg_icv_len != NSIM_IPSEC_AUTH_BITS) { + netdev_err(dev, "IPsec offload requires %d bit authentication\n", + NSIM_IPSEC_AUTH_BITS); + return -EINVAL; + } + + key_data = &xs->aead->alg_key[0]; + key_len = xs->aead->alg_key_len; + alg_name = xs->aead->alg_name; + + if (strcmp(alg_name, aes_gcm_name)) { + netdev_err(dev, "Unsupported IPsec algorithm - please use %s\n", + aes_gcm_name); + return -EINVAL; + } + + /* 160 accounts for 16 byte key and 4 byte salt */ + if (key_len > NSIM_IPSEC_AUTH_BITS) { + *mysalt = ((u32 *)key_data)[4]; + } else if (key_len == NSIM_IPSEC_AUTH_BITS) { + *mysalt = 0; + } else { + netdev_err(dev, "IPsec hw offload only supports 128 bit keys with optional 32 bit salt\n"); + return -EINVAL; + } + memcpy(mykey, key_data, 16); + + return 0; +} + +static int nsim_ipsec_add_sa(struct xfrm_state *xs, + struct netlink_ext_ack *extack) +{ + struct nsim_ipsec *ipsec; + struct net_device *dev; + struct netdevsim *ns; + struct nsim_sa sa; + u16 sa_idx; + int ret; + + dev = xs->xso.real_dev; + ns = netdev_priv(dev); + ipsec = &ns->ipsec; + + if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { + NL_SET_ERR_MSG_MOD(extack, "Unsupported protocol for ipsec offload"); + return -EINVAL; + } + + if (xs->calg) { + NL_SET_ERR_MSG_MOD(extack, "Compression offload not supported"); + return -EINVAL; + } + + if (xs->xso.type != XFRM_DEV_OFFLOAD_CRYPTO) { + NL_SET_ERR_MSG_MOD(extack, "Unsupported ipsec offload type"); + return -EINVAL; + } + + /* find the first unused index */ + ret = nsim_ipsec_find_empty_idx(ipsec); + if (ret < 0) { + NL_SET_ERR_MSG_MOD(extack, "No space for SA in Rx table!"); + return ret; + } + sa_idx = (u16)ret; + + memset(&sa, 0, sizeof(sa)); + sa.used = true; + sa.xs = xs; + + if (sa.xs->id.proto & IPPROTO_ESP) + sa.crypt = xs->ealg || xs->aead; + + /* get the key and salt */ + ret = nsim_ipsec_parse_proto_keys(xs, sa.key, &sa.salt); + if (ret) { + NL_SET_ERR_MSG_MOD(extack, "Failed to get key data for SA table"); + return ret; + } + + if (xs->xso.dir == XFRM_DEV_OFFLOAD_IN) { + sa.rx = true; + + if (xs->props.family == AF_INET6) + memcpy(sa.ipaddr, &xs->id.daddr.a6, 16); + else + memcpy(&sa.ipaddr[3], &xs->id.daddr.a4, 4); + } + + /* the preparations worked, so save the info */ + memcpy(&ipsec->sa[sa_idx], &sa, sizeof(sa)); + + /* the XFRM stack doesn't like offload_handle == 0, + * so add a bitflag in case our array index is 0 + */ + xs->xso.offload_handle = sa_idx | NSIM_IPSEC_VALID; + ipsec->count++; + + return 0; +} + +static void nsim_ipsec_del_sa(struct xfrm_state *xs) +{ + struct netdevsim *ns = netdev_priv(xs->xso.real_dev); + struct nsim_ipsec *ipsec = &ns->ipsec; + u16 sa_idx; + + sa_idx = xs->xso.offload_handle & ~NSIM_IPSEC_VALID; + if (!ipsec->sa[sa_idx].used) { + netdev_err(ns->netdev, "Invalid SA for delete sa_idx=%d\n", + sa_idx); + return; + } + + memset(&ipsec->sa[sa_idx], 0, sizeof(struct nsim_sa)); + ipsec->count--; +} + +static bool nsim_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs) +{ + struct netdevsim *ns = netdev_priv(xs->xso.real_dev); + struct nsim_ipsec *ipsec = &ns->ipsec; + + ipsec->ok++; + + return true; +} + +static const struct xfrmdev_ops nsim_xfrmdev_ops = { + .xdo_dev_state_add = nsim_ipsec_add_sa, + .xdo_dev_state_delete = nsim_ipsec_del_sa, + .xdo_dev_offload_ok = nsim_ipsec_offload_ok, +}; + +bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb) +{ + struct sec_path *sp = skb_sec_path(skb); + struct nsim_ipsec *ipsec = &ns->ipsec; + struct xfrm_state *xs; + struct nsim_sa *tsa; + u32 sa_idx; + + /* do we even need to check this packet? */ + if (!sp) + return true; + + if (unlikely(!sp->len)) { + netdev_err(ns->netdev, "no xfrm state len = %d\n", + sp->len); + return false; + } + + xs = xfrm_input_state(skb); + if (unlikely(!xs)) { + netdev_err(ns->netdev, "no xfrm_input_state() xs = %p\n", xs); + return false; + } + + sa_idx = xs->xso.offload_handle & ~NSIM_IPSEC_VALID; + if (unlikely(sa_idx >= NSIM_IPSEC_MAX_SA_COUNT)) { + netdev_err(ns->netdev, "bad sa_idx=%d max=%d\n", + sa_idx, NSIM_IPSEC_MAX_SA_COUNT); + return false; + } + + tsa = &ipsec->sa[sa_idx]; + if (unlikely(!tsa->used)) { + netdev_err(ns->netdev, "unused sa_idx=%d\n", sa_idx); + return false; + } + + if (xs->id.proto != IPPROTO_ESP && xs->id.proto != IPPROTO_AH) { + netdev_err(ns->netdev, "unexpected proto=%d\n", xs->id.proto); + return false; + } + + ipsec->tx++; + + return true; +} + +void nsim_ipsec_init(struct netdevsim *ns) +{ + ns->netdev->xfrmdev_ops = &nsim_xfrmdev_ops; + +#define NSIM_ESP_FEATURES (NETIF_F_HW_ESP | \ + NETIF_F_HW_ESP_TX_CSUM | \ + NETIF_F_GSO_ESP) + + ns->netdev->features |= NSIM_ESP_FEATURES; + ns->netdev->hw_enc_features |= NSIM_ESP_FEATURES; + + ns->ipsec.pfile = debugfs_create_file("ipsec", 0400, + ns->nsim_dev_port->ddir, ns, + &ipsec_dbg_fops); +} + +void nsim_ipsec_teardown(struct netdevsim *ns) +{ + struct nsim_ipsec *ipsec = &ns->ipsec; + + if (ipsec->count) + netdev_err(ns->netdev, "tearing down IPsec offload with %d SAs left\n", + ipsec->count); + debugfs_remove_recursive(ipsec->pfile); +} -- cgit v1.2.3