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/sunrpc/xprtrdma/svc_rdma_pcl.c | 306 +++++++++++++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 net/sunrpc/xprtrdma/svc_rdma_pcl.c (limited to 'net/sunrpc/xprtrdma/svc_rdma_pcl.c') diff --git a/net/sunrpc/xprtrdma/svc_rdma_pcl.c b/net/sunrpc/xprtrdma/svc_rdma_pcl.c new file mode 100644 index 000000000..b63cfeaa2 --- /dev/null +++ b/net/sunrpc/xprtrdma/svc_rdma_pcl.c @@ -0,0 +1,306 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020 Oracle. All rights reserved. + */ + +#include +#include + +#include "xprt_rdma.h" +#include + +/** + * pcl_free - Release all memory associated with a parsed chunk list + * @pcl: parsed chunk list + * + */ +void pcl_free(struct svc_rdma_pcl *pcl) +{ + while (!list_empty(&pcl->cl_chunks)) { + struct svc_rdma_chunk *chunk; + + chunk = pcl_first_chunk(pcl); + list_del(&chunk->ch_list); + kfree(chunk); + } +} + +static struct svc_rdma_chunk *pcl_alloc_chunk(u32 segcount, u32 position) +{ + struct svc_rdma_chunk *chunk; + + chunk = kmalloc(struct_size(chunk, ch_segments, segcount), GFP_KERNEL); + if (!chunk) + return NULL; + + chunk->ch_position = position; + chunk->ch_length = 0; + chunk->ch_payload_length = 0; + chunk->ch_segcount = 0; + return chunk; +} + +static struct svc_rdma_chunk * +pcl_lookup_position(struct svc_rdma_pcl *pcl, u32 position) +{ + struct svc_rdma_chunk *pos; + + pcl_for_each_chunk(pos, pcl) { + if (pos->ch_position == position) + return pos; + } + return NULL; +} + +static void pcl_insert_position(struct svc_rdma_pcl *pcl, + struct svc_rdma_chunk *chunk) +{ + struct svc_rdma_chunk *pos; + + pcl_for_each_chunk(pos, pcl) { + if (pos->ch_position > chunk->ch_position) + break; + } + __list_add(&chunk->ch_list, pos->ch_list.prev, &pos->ch_list); + pcl->cl_count++; +} + +static void pcl_set_read_segment(const struct svc_rdma_recv_ctxt *rctxt, + struct svc_rdma_chunk *chunk, + u32 handle, u32 length, u64 offset) +{ + struct svc_rdma_segment *segment; + + segment = &chunk->ch_segments[chunk->ch_segcount]; + segment->rs_handle = handle; + segment->rs_length = length; + segment->rs_offset = offset; + + trace_svcrdma_decode_rseg(&rctxt->rc_cid, chunk, segment); + + chunk->ch_length += length; + chunk->ch_segcount++; +} + +/** + * pcl_alloc_call - Construct a parsed chunk list for the Call body + * @rctxt: Ingress receive context + * @p: Start of an un-decoded Read list + * + * Assumptions: + * - The incoming Read list has already been sanity checked. + * - cl_count is already set to the number of segments in + * the un-decoded list. + * - The list might not be in order by position. + * + * Return values: + * %true: Parsed chunk list was successfully constructed, and + * cl_count is updated to be the number of chunks (ie. + * unique positions) in the Read list. + * %false: Memory allocation failed. + */ +bool pcl_alloc_call(struct svc_rdma_recv_ctxt *rctxt, __be32 *p) +{ + struct svc_rdma_pcl *pcl = &rctxt->rc_call_pcl; + unsigned int i, segcount = pcl->cl_count; + + pcl->cl_count = 0; + for (i = 0; i < segcount; i++) { + struct svc_rdma_chunk *chunk; + u32 position, handle, length; + u64 offset; + + p++; /* skip the list discriminator */ + p = xdr_decode_read_segment(p, &position, &handle, + &length, &offset); + if (position != 0) + continue; + + if (pcl_is_empty(pcl)) { + chunk = pcl_alloc_chunk(segcount, position); + if (!chunk) + return false; + pcl_insert_position(pcl, chunk); + } else { + chunk = list_first_entry(&pcl->cl_chunks, + struct svc_rdma_chunk, + ch_list); + } + + pcl_set_read_segment(rctxt, chunk, handle, length, offset); + } + + return true; +} + +/** + * pcl_alloc_read - Construct a parsed chunk list for normal Read chunks + * @rctxt: Ingress receive context + * @p: Start of an un-decoded Read list + * + * Assumptions: + * - The incoming Read list has already been sanity checked. + * - cl_count is already set to the number of segments in + * the un-decoded list. + * - The list might not be in order by position. + * + * Return values: + * %true: Parsed chunk list was successfully constructed, and + * cl_count is updated to be the number of chunks (ie. + * unique position values) in the Read list. + * %false: Memory allocation failed. + * + * TODO: + * - Check for chunk range overlaps + */ +bool pcl_alloc_read(struct svc_rdma_recv_ctxt *rctxt, __be32 *p) +{ + struct svc_rdma_pcl *pcl = &rctxt->rc_read_pcl; + unsigned int i, segcount = pcl->cl_count; + + pcl->cl_count = 0; + for (i = 0; i < segcount; i++) { + struct svc_rdma_chunk *chunk; + u32 position, handle, length; + u64 offset; + + p++; /* skip the list discriminator */ + p = xdr_decode_read_segment(p, &position, &handle, + &length, &offset); + if (position == 0) + continue; + + chunk = pcl_lookup_position(pcl, position); + if (!chunk) { + chunk = pcl_alloc_chunk(segcount, position); + if (!chunk) + return false; + pcl_insert_position(pcl, chunk); + } + + pcl_set_read_segment(rctxt, chunk, handle, length, offset); + } + + return true; +} + +/** + * pcl_alloc_write - Construct a parsed chunk list from a Write list + * @rctxt: Ingress receive context + * @pcl: Parsed chunk list to populate + * @p: Start of an un-decoded Write list + * + * Assumptions: + * - The incoming Write list has already been sanity checked, and + * - cl_count is set to the number of chunks in the un-decoded list. + * + * Return values: + * %true: Parsed chunk list was successfully constructed. + * %false: Memory allocation failed. + */ +bool pcl_alloc_write(struct svc_rdma_recv_ctxt *rctxt, + struct svc_rdma_pcl *pcl, __be32 *p) +{ + struct svc_rdma_segment *segment; + struct svc_rdma_chunk *chunk; + unsigned int i, j; + u32 segcount; + + for (i = 0; i < pcl->cl_count; i++) { + p++; /* skip the list discriminator */ + segcount = be32_to_cpup(p++); + + chunk = pcl_alloc_chunk(segcount, 0); + if (!chunk) + return false; + list_add_tail(&chunk->ch_list, &pcl->cl_chunks); + + for (j = 0; j < segcount; j++) { + segment = &chunk->ch_segments[j]; + p = xdr_decode_rdma_segment(p, &segment->rs_handle, + &segment->rs_length, + &segment->rs_offset); + trace_svcrdma_decode_wseg(&rctxt->rc_cid, chunk, j); + + chunk->ch_length += segment->rs_length; + chunk->ch_segcount++; + } + } + return true; +} + +static int pcl_process_region(const struct xdr_buf *xdr, + unsigned int offset, unsigned int length, + int (*actor)(const struct xdr_buf *, void *), + void *data) +{ + struct xdr_buf subbuf; + + if (!length) + return 0; + if (xdr_buf_subsegment(xdr, &subbuf, offset, length)) + return -EMSGSIZE; + return actor(&subbuf, data); +} + +/** + * pcl_process_nonpayloads - Process non-payload regions inside @xdr + * @pcl: Chunk list to process + * @xdr: xdr_buf to process + * @actor: Function to invoke on each non-payload region + * @data: Arguments for @actor + * + * This mechanism must ignore not only result payloads that were already + * sent via RDMA Write, but also XDR padding for those payloads that + * the upper layer has added. + * + * Assumptions: + * The xdr->len and ch_position fields are aligned to 4-byte multiples. + * + * Returns: + * On success, zero, + * %-EMSGSIZE on XDR buffer overflow, or + * The return value of @actor + */ +int pcl_process_nonpayloads(const struct svc_rdma_pcl *pcl, + const struct xdr_buf *xdr, + int (*actor)(const struct xdr_buf *, void *), + void *data) +{ + struct svc_rdma_chunk *chunk, *next; + unsigned int start; + int ret; + + chunk = pcl_first_chunk(pcl); + + /* No result payloads were generated */ + if (!chunk || !chunk->ch_payload_length) + return actor(xdr, data); + + /* Process the region before the first result payload */ + ret = pcl_process_region(xdr, 0, chunk->ch_position, actor, data); + if (ret < 0) + return ret; + + /* Process the regions between each middle result payload */ + while ((next = pcl_next_chunk(pcl, chunk))) { + if (!next->ch_payload_length) + break; + + start = pcl_chunk_end_offset(chunk); + ret = pcl_process_region(xdr, start, next->ch_position - start, + actor, data); + if (ret < 0) + return ret; + + chunk = next; + } + + /* Process the region after the last result payload */ + start = pcl_chunk_end_offset(chunk); + ret = pcl_process_region(xdr, start, xdr->len - start, actor, data); + if (ret < 0) + return ret; + + return 0; +} -- cgit v1.2.3