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/proc.c | 400 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 400 insertions(+) create mode 100644 net/atm/proc.c (limited to 'net/atm/proc.c') diff --git a/net/atm/proc.c b/net/atm/proc.c new file mode 100644 index 000000000..9bf736290 --- /dev/null +++ b/net/atm/proc.c @@ -0,0 +1,400 @@ +// SPDX-License-Identifier: GPL-2.0 +/* net/atm/proc.c - ATM /proc interface + * + * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA + * + * seq_file api usage by romieu@fr.zoreil.com + * + * Evaluating the efficiency of the whole thing if left as an exercise to + * the reader. + */ + +#include /* for EXPORT_SYMBOL */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include /* for __init */ +#include +#include +#include +#include +#include /* for HZ */ +#include +#include "resources.h" +#include "common.h" /* atm_proc_init prototype */ +#include "signaling.h" /* to get sigd - ugly too */ + +static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, + size_t count, loff_t *pos); + +static const struct proc_ops atm_dev_proc_ops = { + .proc_read = proc_dev_atm_read, + .proc_lseek = noop_llseek, +}; + +static void add_stats(struct seq_file *seq, const char *aal, + const struct k_atm_aal_stats *stats) +{ + seq_printf(seq, "%s ( %d %d %d %d %d )", aal, + atomic_read(&stats->tx), atomic_read(&stats->tx_err), + atomic_read(&stats->rx), atomic_read(&stats->rx_err), + atomic_read(&stats->rx_drop)); +} + +static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev) +{ + int i; + + seq_printf(seq, "%3d %-8s", dev->number, dev->type); + for (i = 0; i < ESI_LEN; i++) + seq_printf(seq, "%02x", dev->esi[i]); + seq_puts(seq, " "); + add_stats(seq, "0", &dev->stats.aal0); + seq_puts(seq, " "); + add_stats(seq, "5", &dev->stats.aal5); + seq_printf(seq, "\t[%d]", refcount_read(&dev->refcnt)); + seq_putc(seq, '\n'); +} + +struct vcc_state { + int bucket; + struct sock *sk; +}; + +static inline int compare_family(struct sock *sk, int family) +{ + return !family || (sk->sk_family == family); +} + +static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l) +{ + struct sock *sk = *sock; + + if (sk == SEQ_START_TOKEN) { + for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) { + struct hlist_head *head = &vcc_hash[*bucket]; + + sk = hlist_empty(head) ? NULL : __sk_head(head); + if (sk) + break; + } + l--; + } +try_again: + for (; sk; sk = sk_next(sk)) { + l -= compare_family(sk, family); + if (l < 0) + goto out; + } + if (!sk && ++*bucket < VCC_HTABLE_SIZE) { + sk = sk_head(&vcc_hash[*bucket]); + goto try_again; + } + sk = SEQ_START_TOKEN; +out: + *sock = sk; + return (l < 0); +} + +static inline void *vcc_walk(struct seq_file *seq, loff_t l) +{ + struct vcc_state *state = seq->private; + int family = (uintptr_t)(pde_data(file_inode(seq->file))); + + return __vcc_walk(&state->sk, family, &state->bucket, l) ? + state : NULL; +} + +static void *vcc_seq_start(struct seq_file *seq, loff_t *pos) + __acquires(vcc_sklist_lock) +{ + struct vcc_state *state = seq->private; + loff_t left = *pos; + + read_lock(&vcc_sklist_lock); + state->sk = SEQ_START_TOKEN; + return left ? vcc_walk(seq, left) : SEQ_START_TOKEN; +} + +static void vcc_seq_stop(struct seq_file *seq, void *v) + __releases(vcc_sklist_lock) +{ + read_unlock(&vcc_sklist_lock); +} + +static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + v = vcc_walk(seq, 1); + (*pos)++; + return v; +} + +static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc) +{ + static const char *const class_name[] = { + "off", "UBR", "CBR", "VBR", "ABR"}; + static const char *const aal_name[] = { + "---", "1", "2", "3/4", /* 0- 3 */ + "???", "5", "???", "???", /* 4- 7 */ + "???", "???", "???", "???", /* 8-11 */ + "???", "0", "???", "???"}; /* 12-15 */ + + seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s", + vcc->dev->number, vcc->vpi, vcc->vci, + vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" : + aal_name[vcc->qos.aal], vcc->qos.rxtp.min_pcr, + class_name[vcc->qos.rxtp.traffic_class], + vcc->qos.txtp.min_pcr, + class_name[vcc->qos.txtp.traffic_class]); + if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) { + struct clip_vcc *clip_vcc = CLIP_VCC(vcc); + struct net_device *dev; + + dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL; + seq_printf(seq, "CLIP, Itf:%s, Encap:", + dev ? dev->name : "none?"); + seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None"); + } + seq_putc(seq, '\n'); +} + +static const char *vcc_state(struct atm_vcc *vcc) +{ + static const char *const map[] = { ATM_VS2TXT_MAP }; + + return map[ATM_VF2VS(vcc->flags)]; +} + +static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) +{ + struct sock *sk = sk_atm(vcc); + + seq_printf(seq, "%pK ", vcc); + if (!vcc->dev) + seq_printf(seq, "Unassigned "); + else + seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, + vcc->vci); + switch (sk->sk_family) { + case AF_ATMPVC: + seq_printf(seq, "PVC"); + break; + case AF_ATMSVC: + seq_printf(seq, "SVC"); + break; + default: + seq_printf(seq, "%3d", sk->sk_family); + } + seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", + vcc->flags, sk->sk_err, + sk_wmem_alloc_get(sk), sk->sk_sndbuf, + sk_rmem_alloc_get(sk), sk->sk_rcvbuf, + refcount_read(&sk->sk_refcnt)); +} + +static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) +{ + if (!vcc->dev) + seq_printf(seq, sizeof(void *) == 4 ? + "N/A@%pK%10s" : "N/A@%pK%2s", vcc, ""); + else + seq_printf(seq, "%3d %3d %5d ", + vcc->dev->number, vcc->vpi, vcc->vci); + seq_printf(seq, "%-10s ", vcc_state(vcc)); + seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub, + *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : ""); + if (*vcc->remote.sas_addr.prv) { + int i; + + for (i = 0; i < ATM_ESA_LEN; i++) + seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]); + } + seq_putc(seq, '\n'); +} + +static int atm_dev_seq_show(struct seq_file *seq, void *v) +{ + static char atm_dev_banner[] = + "Itf Type ESI/\"MAC\"addr " + "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; + + if (v == &atm_devs) + seq_puts(seq, atm_dev_banner); + else { + struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); + + atm_dev_info(seq, dev); + } + return 0; +} + +static const struct seq_operations atm_dev_seq_ops = { + .start = atm_dev_seq_start, + .next = atm_dev_seq_next, + .stop = atm_dev_seq_stop, + .show = atm_dev_seq_show, +}; + +static int pvc_seq_show(struct seq_file *seq, void *v) +{ + static char atm_pvc_banner[] = + "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n"; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, atm_pvc_banner); + else { + struct vcc_state *state = seq->private; + struct atm_vcc *vcc = atm_sk(state->sk); + + pvc_info(seq, vcc); + } + return 0; +} + +static const struct seq_operations pvc_seq_ops = { + .start = vcc_seq_start, + .next = vcc_seq_next, + .stop = vcc_seq_stop, + .show = pvc_seq_show, +}; + +static int vcc_seq_show(struct seq_file *seq, void *v) +{ + if (v == SEQ_START_TOKEN) { + seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s", + "Address ", "Itf VPI VCI Fam Flags Reply " + "Send buffer Recv buffer [refcnt]\n"); + } else { + struct vcc_state *state = seq->private; + struct atm_vcc *vcc = atm_sk(state->sk); + + vcc_info(seq, vcc); + } + return 0; +} + +static const struct seq_operations vcc_seq_ops = { + .start = vcc_seq_start, + .next = vcc_seq_next, + .stop = vcc_seq_stop, + .show = vcc_seq_show, +}; + +static int svc_seq_show(struct seq_file *seq, void *v) +{ + static const char atm_svc_banner[] = + "Itf VPI VCI State Remote\n"; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, atm_svc_banner); + else { + struct vcc_state *state = seq->private; + struct atm_vcc *vcc = atm_sk(state->sk); + + svc_info(seq, vcc); + } + return 0; +} + +static const struct seq_operations svc_seq_ops = { + .start = vcc_seq_start, + .next = vcc_seq_next, + .stop = vcc_seq_stop, + .show = svc_seq_show, +}; + +static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, + size_t count, loff_t *pos) +{ + struct atm_dev *dev; + unsigned long page; + int length; + + if (count == 0) + return 0; + page = get_zeroed_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + dev = pde_data(file_inode(file)); + if (!dev->ops->proc_read) + length = -EINVAL; + else { + length = dev->ops->proc_read(dev, pos, (char *)page); + if (length > count) + length = -EINVAL; + } + if (length >= 0) { + if (copy_to_user(buf, (char *)page, length)) + length = -EFAULT; + (*pos)++; + } + free_page(page); + return length; +} + +struct proc_dir_entry *atm_proc_root; +EXPORT_SYMBOL(atm_proc_root); + + +int atm_proc_dev_register(struct atm_dev *dev) +{ + int error; + + /* No proc info */ + if (!dev->ops->proc_read) + return 0; + + error = -ENOMEM; + dev->proc_name = kasprintf(GFP_KERNEL, "%s:%d", dev->type, dev->number); + if (!dev->proc_name) + goto err_out; + + dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root, + &atm_dev_proc_ops, dev); + if (!dev->proc_entry) + goto err_free_name; + return 0; + +err_free_name: + kfree(dev->proc_name); +err_out: + return error; +} + +void atm_proc_dev_deregister(struct atm_dev *dev) +{ + if (!dev->ops->proc_read) + return; + + remove_proc_entry(dev->proc_name, atm_proc_root); + kfree(dev->proc_name); +} + +int __init atm_proc_init(void) +{ + atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); + if (!atm_proc_root) + return -ENOMEM; + proc_create_seq("devices", 0444, atm_proc_root, &atm_dev_seq_ops); + proc_create_seq_private("pvc", 0444, atm_proc_root, &pvc_seq_ops, + sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMPVC); + proc_create_seq_private("svc", 0444, atm_proc_root, &svc_seq_ops, + sizeof(struct vcc_state), (void *)(uintptr_t)PF_ATMSVC); + proc_create_seq_private("vc", 0444, atm_proc_root, &vcc_seq_ops, + sizeof(struct vcc_state), NULL); + return 0; +} + +void atm_proc_exit(void) +{ + remove_proc_subtree("atm", init_net.proc_net); +} -- cgit v1.2.3