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/atm/signaling.c | 244 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 244 insertions(+) create mode 100644 net/atm/signaling.c (limited to 'net/atm/signaling.c') diff --git a/net/atm/signaling.c b/net/atm/signaling.c new file mode 100644 index 000000000..5de06ab8e --- /dev/null +++ b/net/atm/signaling.c @@ -0,0 +1,244 @@ +// SPDX-License-Identifier: GPL-2.0 +/* net/atm/signaling.c - ATM signaling */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + +#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ + +#include /* error codes */ +#include /* printk */ +#include +#include +#include /* jiffies and HZ */ +#include /* ATM stuff */ +#include +#include +#include +#include +#include + +#include "resources.h" +#include "signaling.h" + +struct atm_vcc *sigd = NULL; + +static void sigd_put_skb(struct sk_buff *skb) +{ + if (!sigd) { + pr_debug("atmsvc: no signaling daemon\n"); + kfree_skb(skb); + return; + } + atm_force_charge(sigd, skb->truesize); + skb_queue_tail(&sk_atm(sigd)->sk_receive_queue, skb); + sk_atm(sigd)->sk_data_ready(sk_atm(sigd)); +} + +static void modify_qos(struct atm_vcc *vcc, struct atmsvc_msg *msg) +{ + struct sk_buff *skb; + + if (test_bit(ATM_VF_RELEASED, &vcc->flags) || + !test_bit(ATM_VF_READY, &vcc->flags)) + return; + msg->type = as_error; + if (!vcc->dev->ops->change_qos) + msg->reply = -EOPNOTSUPP; + else { + /* should lock VCC */ + msg->reply = vcc->dev->ops->change_qos(vcc, &msg->qos, + msg->reply); + if (!msg->reply) + msg->type = as_okay; + } + /* + * Should probably just turn around the old skb. But then, the buffer + * space accounting needs to follow the change too. Maybe later. + */ + while (!(skb = alloc_skb(sizeof(struct atmsvc_msg), GFP_KERNEL))) + schedule(); + *(struct atmsvc_msg *)skb_put(skb, sizeof(struct atmsvc_msg)) = *msg; + sigd_put_skb(skb); +} + +static int sigd_send(struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct atmsvc_msg *msg; + struct atm_vcc *session_vcc; + struct sock *sk; + + msg = (struct atmsvc_msg *) skb->data; + WARN_ON(refcount_sub_and_test(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc)); + vcc = *(struct atm_vcc **) &msg->vcc; + pr_debug("%d (0x%lx)\n", (int)msg->type, (unsigned long)vcc); + sk = sk_atm(vcc); + + switch (msg->type) { + case as_okay: + sk->sk_err = -msg->reply; + clear_bit(ATM_VF_WAITING, &vcc->flags); + if (!*vcc->local.sas_addr.prv && !*vcc->local.sas_addr.pub) { + vcc->local.sas_family = AF_ATMSVC; + memcpy(vcc->local.sas_addr.prv, + msg->local.sas_addr.prv, ATM_ESA_LEN); + memcpy(vcc->local.sas_addr.pub, + msg->local.sas_addr.pub, ATM_E164_LEN + 1); + } + session_vcc = vcc->session ? vcc->session : vcc; + if (session_vcc->vpi || session_vcc->vci) + break; + session_vcc->itf = msg->pvc.sap_addr.itf; + session_vcc->vpi = msg->pvc.sap_addr.vpi; + session_vcc->vci = msg->pvc.sap_addr.vci; + if (session_vcc->vpi || session_vcc->vci) + session_vcc->qos = msg->qos; + break; + case as_error: + clear_bit(ATM_VF_REGIS, &vcc->flags); + clear_bit(ATM_VF_READY, &vcc->flags); + sk->sk_err = -msg->reply; + clear_bit(ATM_VF_WAITING, &vcc->flags); + break; + case as_indicate: + vcc = *(struct atm_vcc **)&msg->listen_vcc; + sk = sk_atm(vcc); + pr_debug("as_indicate!!!\n"); + lock_sock(sk); + if (sk_acceptq_is_full(sk)) { + sigd_enq(NULL, as_reject, vcc, NULL, NULL); + dev_kfree_skb(skb); + goto as_indicate_complete; + } + sk_acceptq_added(sk); + skb_queue_tail(&sk->sk_receive_queue, skb); + pr_debug("waking sk_sleep(sk) 0x%p\n", sk_sleep(sk)); + sk->sk_state_change(sk); +as_indicate_complete: + release_sock(sk); + return 0; + case as_close: + set_bit(ATM_VF_RELEASED, &vcc->flags); + vcc_release_async(vcc, msg->reply); + goto out; + case as_modify: + modify_qos(vcc, msg); + break; + case as_addparty: + case as_dropparty: + sk->sk_err_soft = -msg->reply; + /* < 0 failure, otherwise ep_ref */ + clear_bit(ATM_VF_WAITING, &vcc->flags); + break; + default: + pr_alert("bad message type %d\n", (int)msg->type); + return -EINVAL; + } + sk->sk_state_change(sk); +out: + dev_kfree_skb(skb); + return 0; +} + +void sigd_enq2(struct atm_vcc *vcc, enum atmsvc_msg_type type, + struct atm_vcc *listen_vcc, const struct sockaddr_atmpvc *pvc, + const struct sockaddr_atmsvc *svc, const struct atm_qos *qos, + int reply) +{ + struct sk_buff *skb; + struct atmsvc_msg *msg; + static unsigned int session = 0; + + pr_debug("%d (0x%p)\n", (int)type, vcc); + while (!(skb = alloc_skb(sizeof(struct atmsvc_msg), GFP_KERNEL))) + schedule(); + msg = skb_put_zero(skb, sizeof(struct atmsvc_msg)); + msg->type = type; + *(struct atm_vcc **) &msg->vcc = vcc; + *(struct atm_vcc **) &msg->listen_vcc = listen_vcc; + msg->reply = reply; + if (qos) + msg->qos = *qos; + if (vcc) + msg->sap = vcc->sap; + if (svc) + msg->svc = *svc; + if (vcc) + msg->local = vcc->local; + if (pvc) + msg->pvc = *pvc; + if (vcc) { + if (type == as_connect && test_bit(ATM_VF_SESSION, &vcc->flags)) + msg->session = ++session; + /* every new pmp connect gets the next session number */ + } + sigd_put_skb(skb); + if (vcc) + set_bit(ATM_VF_REGIS, &vcc->flags); +} + +void sigd_enq(struct atm_vcc *vcc, enum atmsvc_msg_type type, + struct atm_vcc *listen_vcc, const struct sockaddr_atmpvc *pvc, + const struct sockaddr_atmsvc *svc) +{ + sigd_enq2(vcc, type, listen_vcc, pvc, svc, vcc ? &vcc->qos : NULL, 0); + /* other ISP applications may use "reply" */ +} + +static void purge_vcc(struct atm_vcc *vcc) +{ + if (sk_atm(vcc)->sk_family == PF_ATMSVC && + !test_bit(ATM_VF_META, &vcc->flags)) { + set_bit(ATM_VF_RELEASED, &vcc->flags); + clear_bit(ATM_VF_REGIS, &vcc->flags); + vcc_release_async(vcc, -EUNATCH); + } +} + +static void sigd_close(struct atm_vcc *vcc) +{ + struct sock *s; + int i; + + pr_debug("\n"); + sigd = NULL; + if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) + pr_err("closing with requests pending\n"); + skb_queue_purge(&sk_atm(vcc)->sk_receive_queue); + + read_lock(&vcc_sklist_lock); + for (i = 0; i < VCC_HTABLE_SIZE; ++i) { + struct hlist_head *head = &vcc_hash[i]; + + sk_for_each(s, head) { + vcc = atm_sk(s); + + purge_vcc(vcc); + } + } + read_unlock(&vcc_sklist_lock); +} + +static const struct atmdev_ops sigd_dev_ops = { + .close = sigd_close, + .send = sigd_send +}; + +static struct atm_dev sigd_dev = { + .ops = &sigd_dev_ops, + .type = "sig", + .number = 999, + .lock = __SPIN_LOCK_UNLOCKED(sigd_dev.lock) +}; + +int sigd_attach(struct atm_vcc *vcc) +{ + if (sigd) + return -EADDRINUSE; + pr_debug("\n"); + sigd = vcc; + vcc->dev = &sigd_dev; + vcc_insert_socket(sk_atm(vcc)); + set_bit(ATM_VF_META, &vcc->flags); + set_bit(ATM_VF_READY, &vcc->flags); + return 0; +} -- cgit v1.2.3