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/xen-netback/hash.c | 468 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 468 insertions(+) create mode 100644 drivers/net/xen-netback/hash.c (limited to 'drivers/net/xen-netback/hash.c') diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-netback/hash.c new file mode 100644 index 000000000..ff96f2264 --- /dev/null +++ b/drivers/net/xen-netback/hash.c @@ -0,0 +1,468 @@ +/* + * Copyright (c) 2016 Citrix Systems Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License version 2 + * as published by the Free Softare Foundation; or, when distributed + * separately from the Linux kernel or incorporated into other + * software packages, subject to the following license: + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this source file (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, modify, + * merge, publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#define XEN_NETIF_DEFINE_TOEPLITZ + +#include "common.h" +#include +#include + +static void xenvif_add_hash(struct xenvif *vif, const u8 *tag, + unsigned int len, u32 val) +{ + struct xenvif_hash_cache_entry *new, *entry, *oldest; + unsigned long flags; + bool found; + + new = kmalloc(sizeof(*entry), GFP_ATOMIC); + if (!new) + return; + + memcpy(new->tag, tag, len); + new->len = len; + new->val = val; + + spin_lock_irqsave(&vif->hash.cache.lock, flags); + + found = false; + oldest = NULL; + list_for_each_entry_rcu(entry, &vif->hash.cache.list, link, + lockdep_is_held(&vif->hash.cache.lock)) { + /* Make sure we don't add duplicate entries */ + if (entry->len == len && + memcmp(entry->tag, tag, len) == 0) + found = true; + if (!oldest || entry->seq < oldest->seq) + oldest = entry; + } + + if (!found) { + new->seq = atomic_inc_return(&vif->hash.cache.seq); + list_add_rcu(&new->link, &vif->hash.cache.list); + + if (++vif->hash.cache.count > xenvif_hash_cache_size) { + list_del_rcu(&oldest->link); + vif->hash.cache.count--; + kfree_rcu(oldest, rcu); + } + } + + spin_unlock_irqrestore(&vif->hash.cache.lock, flags); + + if (found) + kfree(new); +} + +static u32 xenvif_new_hash(struct xenvif *vif, const u8 *data, + unsigned int len) +{ + u32 val; + + val = xen_netif_toeplitz_hash(vif->hash.key, + sizeof(vif->hash.key), + data, len); + + if (xenvif_hash_cache_size != 0) + xenvif_add_hash(vif, data, len, val); + + return val; +} + +static void xenvif_flush_hash(struct xenvif *vif) +{ + struct xenvif_hash_cache_entry *entry; + unsigned long flags; + + if (xenvif_hash_cache_size == 0) + return; + + spin_lock_irqsave(&vif->hash.cache.lock, flags); + + list_for_each_entry_rcu(entry, &vif->hash.cache.list, link, + lockdep_is_held(&vif->hash.cache.lock)) { + list_del_rcu(&entry->link); + vif->hash.cache.count--; + kfree_rcu(entry, rcu); + } + + spin_unlock_irqrestore(&vif->hash.cache.lock, flags); +} + +static u32 xenvif_find_hash(struct xenvif *vif, const u8 *data, + unsigned int len) +{ + struct xenvif_hash_cache_entry *entry; + u32 val; + bool found; + + if (len >= XEN_NETBK_HASH_TAG_SIZE) + return 0; + + if (xenvif_hash_cache_size == 0) + return xenvif_new_hash(vif, data, len); + + rcu_read_lock(); + + found = false; + + list_for_each_entry_rcu(entry, &vif->hash.cache.list, link) { + if (entry->len == len && + memcmp(entry->tag, data, len) == 0) { + val = entry->val; + entry->seq = atomic_inc_return(&vif->hash.cache.seq); + found = true; + break; + } + } + + rcu_read_unlock(); + + if (!found) + val = xenvif_new_hash(vif, data, len); + + return val; +} + +void xenvif_set_skb_hash(struct xenvif *vif, struct sk_buff *skb) +{ + struct flow_keys flow; + u32 hash = 0; + enum pkt_hash_types type = PKT_HASH_TYPE_NONE; + u32 flags = vif->hash.flags; + bool has_tcp_hdr; + + /* Quick rejection test: If the network protocol doesn't + * correspond to any enabled hash type then there's no point + * in parsing the packet header. + */ + switch (skb->protocol) { + case htons(ETH_P_IP): + if (flags & (XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP | + XEN_NETIF_CTRL_HASH_TYPE_IPV4)) + break; + + goto done; + + case htons(ETH_P_IPV6): + if (flags & (XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP | + XEN_NETIF_CTRL_HASH_TYPE_IPV6)) + break; + + goto done; + + default: + goto done; + } + + memset(&flow, 0, sizeof(flow)); + if (!skb_flow_dissect_flow_keys(skb, &flow, 0)) + goto done; + + has_tcp_hdr = (flow.basic.ip_proto == IPPROTO_TCP) && + !(flow.control.flags & FLOW_DIS_IS_FRAGMENT); + + switch (skb->protocol) { + case htons(ETH_P_IP): + if (has_tcp_hdr && + (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP)) { + u8 data[12]; + + memcpy(&data[0], &flow.addrs.v4addrs.src, 4); + memcpy(&data[4], &flow.addrs.v4addrs.dst, 4); + memcpy(&data[8], &flow.ports.src, 2); + memcpy(&data[10], &flow.ports.dst, 2); + + hash = xenvif_find_hash(vif, data, sizeof(data)); + type = PKT_HASH_TYPE_L4; + } else if (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4) { + u8 data[8]; + + memcpy(&data[0], &flow.addrs.v4addrs.src, 4); + memcpy(&data[4], &flow.addrs.v4addrs.dst, 4); + + hash = xenvif_find_hash(vif, data, sizeof(data)); + type = PKT_HASH_TYPE_L3; + } + + break; + + case htons(ETH_P_IPV6): + if (has_tcp_hdr && + (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)) { + u8 data[36]; + + memcpy(&data[0], &flow.addrs.v6addrs.src, 16); + memcpy(&data[16], &flow.addrs.v6addrs.dst, 16); + memcpy(&data[32], &flow.ports.src, 2); + memcpy(&data[34], &flow.ports.dst, 2); + + hash = xenvif_find_hash(vif, data, sizeof(data)); + type = PKT_HASH_TYPE_L4; + } else if (flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6) { + u8 data[32]; + + memcpy(&data[0], &flow.addrs.v6addrs.src, 16); + memcpy(&data[16], &flow.addrs.v6addrs.dst, 16); + + hash = xenvif_find_hash(vif, data, sizeof(data)); + type = PKT_HASH_TYPE_L3; + } + + break; + } + +done: + if (type == PKT_HASH_TYPE_NONE) + skb_clear_hash(skb); + else + __skb_set_sw_hash(skb, hash, type == PKT_HASH_TYPE_L4); +} + +u32 xenvif_set_hash_alg(struct xenvif *vif, u32 alg) +{ + switch (alg) { + case XEN_NETIF_CTRL_HASH_ALGORITHM_NONE: + case XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ: + break; + + default: + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + } + + vif->hash.alg = alg; + + return XEN_NETIF_CTRL_STATUS_SUCCESS; +} + +u32 xenvif_get_hash_flags(struct xenvif *vif, u32 *flags) +{ + if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE) + return XEN_NETIF_CTRL_STATUS_NOT_SUPPORTED; + + *flags = XEN_NETIF_CTRL_HASH_TYPE_IPV4 | + XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP | + XEN_NETIF_CTRL_HASH_TYPE_IPV6 | + XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP; + + return XEN_NETIF_CTRL_STATUS_SUCCESS; +} + +u32 xenvif_set_hash_flags(struct xenvif *vif, u32 flags) +{ + if (flags & ~(XEN_NETIF_CTRL_HASH_TYPE_IPV4 | + XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP | + XEN_NETIF_CTRL_HASH_TYPE_IPV6 | + XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP)) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + + if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + + vif->hash.flags = flags; + + return XEN_NETIF_CTRL_STATUS_SUCCESS; +} + +u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len) +{ + u8 *key = vif->hash.key; + struct gnttab_copy copy_op = { + .source.u.ref = gref, + .source.domid = vif->domid, + .dest.u.gmfn = virt_to_gfn(key), + .dest.domid = DOMID_SELF, + .dest.offset = xen_offset_in_page(key), + .len = len, + .flags = GNTCOPY_source_gref + }; + + if (len > XEN_NETBK_MAX_HASH_KEY_SIZE) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + + if (copy_op.len != 0) { + gnttab_batch_copy(©_op, 1); + + if (copy_op.status != GNTST_okay) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + } + + /* Clear any remaining key octets */ + if (len < XEN_NETBK_MAX_HASH_KEY_SIZE) + memset(key + len, 0, XEN_NETBK_MAX_HASH_KEY_SIZE - len); + + xenvif_flush_hash(vif); + + return XEN_NETIF_CTRL_STATUS_SUCCESS; +} + +u32 xenvif_set_hash_mapping_size(struct xenvif *vif, u32 size) +{ + if (size > XEN_NETBK_MAX_HASH_MAPPING_SIZE) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + + vif->hash.size = size; + memset(vif->hash.mapping[vif->hash.mapping_sel], 0, + sizeof(u32) * size); + + return XEN_NETIF_CTRL_STATUS_SUCCESS; +} + +u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len, + u32 off) +{ + u32 *mapping = vif->hash.mapping[!vif->hash.mapping_sel]; + unsigned int nr = 1; + struct gnttab_copy copy_op[2] = {{ + .source.u.ref = gref, + .source.domid = vif->domid, + .dest.domid = DOMID_SELF, + .len = len * sizeof(*mapping), + .flags = GNTCOPY_source_gref + }}; + + if ((off + len < off) || (off + len > vif->hash.size) || + len > XEN_PAGE_SIZE / sizeof(*mapping)) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + + copy_op[0].dest.u.gmfn = virt_to_gfn(mapping + off); + copy_op[0].dest.offset = xen_offset_in_page(mapping + off); + if (copy_op[0].dest.offset + copy_op[0].len > XEN_PAGE_SIZE) { + copy_op[1] = copy_op[0]; + copy_op[1].source.offset = XEN_PAGE_SIZE - copy_op[0].dest.offset; + copy_op[1].dest.u.gmfn = virt_to_gfn(mapping + off + len); + copy_op[1].dest.offset = 0; + copy_op[1].len = copy_op[0].len - copy_op[1].source.offset; + copy_op[0].len = copy_op[1].source.offset; + nr = 2; + } + + memcpy(mapping, vif->hash.mapping[vif->hash.mapping_sel], + vif->hash.size * sizeof(*mapping)); + + if (copy_op[0].len != 0) { + gnttab_batch_copy(copy_op, nr); + + if (copy_op[0].status != GNTST_okay || + copy_op[nr - 1].status != GNTST_okay) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + } + + while (len-- != 0) + if (mapping[off++] >= vif->num_queues) + return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER; + + vif->hash.mapping_sel = !vif->hash.mapping_sel; + + return XEN_NETIF_CTRL_STATUS_SUCCESS; +} + +#ifdef CONFIG_DEBUG_FS +void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m) +{ + unsigned int i; + + switch (vif->hash.alg) { + case XEN_NETIF_CTRL_HASH_ALGORITHM_TOEPLITZ: + seq_puts(m, "Hash Algorithm: TOEPLITZ\n"); + break; + + case XEN_NETIF_CTRL_HASH_ALGORITHM_NONE: + seq_puts(m, "Hash Algorithm: NONE\n"); + fallthrough; + default: + return; + } + + if (vif->hash.flags) { + seq_puts(m, "\nHash Flags:\n"); + + if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4) + seq_puts(m, "- IPv4\n"); + if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV4_TCP) + seq_puts(m, "- IPv4 + TCP\n"); + if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6) + seq_puts(m, "- IPv6\n"); + if (vif->hash.flags & XEN_NETIF_CTRL_HASH_TYPE_IPV6_TCP) + seq_puts(m, "- IPv6 + TCP\n"); + } + + seq_puts(m, "\nHash Key:\n"); + + for (i = 0; i < XEN_NETBK_MAX_HASH_KEY_SIZE; ) { + unsigned int j, n; + + n = 8; + if (i + n >= XEN_NETBK_MAX_HASH_KEY_SIZE) + n = XEN_NETBK_MAX_HASH_KEY_SIZE - i; + + seq_printf(m, "[%2u - %2u]: ", i, i + n - 1); + + for (j = 0; j < n; j++, i++) + seq_printf(m, "%02x ", vif->hash.key[i]); + + seq_puts(m, "\n"); + } + + if (vif->hash.size != 0) { + const u32 *mapping = vif->hash.mapping[vif->hash.mapping_sel]; + + seq_puts(m, "\nHash Mapping:\n"); + + for (i = 0; i < vif->hash.size; ) { + unsigned int j, n; + + n = 8; + if (i + n >= vif->hash.size) + n = vif->hash.size - i; + + seq_printf(m, "[%4u - %4u]: ", i, i + n - 1); + + for (j = 0; j < n; j++, i++) + seq_printf(m, "%4u ", mapping[i]); + + seq_puts(m, "\n"); + } + } +} +#endif /* CONFIG_DEBUG_FS */ + +void xenvif_init_hash(struct xenvif *vif) +{ + if (xenvif_hash_cache_size == 0) + return; + + BUG_ON(vif->hash.cache.count); + + spin_lock_init(&vif->hash.cache.lock); + INIT_LIST_HEAD(&vif->hash.cache.list); +} + +void xenvif_deinit_hash(struct xenvif *vif) +{ + xenvif_flush_hash(vif); +} -- cgit v1.2.3