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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /net/sched/act_skbedit.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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(). ...
Diffstat (limited to '')
-rw-r--r--net/sched/act_skbedit.c464
1 files changed, 464 insertions, 0 deletions
diff --git a/net/sched/act_skbedit.c b/net/sched/act_skbedit.c
new file mode 100644
index 000000000..ce7008cf2
--- /dev/null
+++ b/net/sched/act_skbedit.c
@@ -0,0 +1,464 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2008, Intel Corporation.
+ *
+ * Author: Alexander Duyck <alexander.h.duyck@intel.com>
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/dsfield.h>
+#include <net/pkt_cls.h>
+#include <net/tc_wrapper.h>
+
+#include <linux/tc_act/tc_skbedit.h>
+#include <net/tc_act/tc_skbedit.h>
+
+static struct tc_action_ops act_skbedit_ops;
+
+static u16 tcf_skbedit_hash(struct tcf_skbedit_params *params,
+ struct sk_buff *skb)
+{
+ u16 queue_mapping = params->queue_mapping;
+
+ if (params->flags & SKBEDIT_F_TXQ_SKBHASH) {
+ u32 hash = skb_get_hash(skb);
+
+ queue_mapping += hash % params->mapping_mod;
+ }
+
+ return netdev_cap_txqueue(skb->dev, queue_mapping);
+}
+
+TC_INDIRECT_SCOPE int tcf_skbedit_act(struct sk_buff *skb,
+ const struct tc_action *a,
+ struct tcf_result *res)
+{
+ struct tcf_skbedit *d = to_skbedit(a);
+ struct tcf_skbedit_params *params;
+ int action;
+
+ tcf_lastuse_update(&d->tcf_tm);
+ bstats_update(this_cpu_ptr(d->common.cpu_bstats), skb);
+
+ params = rcu_dereference_bh(d->params);
+ action = READ_ONCE(d->tcf_action);
+
+ if (params->flags & SKBEDIT_F_PRIORITY)
+ skb->priority = params->priority;
+ if (params->flags & SKBEDIT_F_INHERITDSFIELD) {
+ int wlen = skb_network_offset(skb);
+
+ switch (skb_protocol(skb, true)) {
+ case htons(ETH_P_IP):
+ wlen += sizeof(struct iphdr);
+ if (!pskb_may_pull(skb, wlen))
+ goto err;
+ skb->priority = ipv4_get_dsfield(ip_hdr(skb)) >> 2;
+ break;
+
+ case htons(ETH_P_IPV6):
+ wlen += sizeof(struct ipv6hdr);
+ if (!pskb_may_pull(skb, wlen))
+ goto err;
+ skb->priority = ipv6_get_dsfield(ipv6_hdr(skb)) >> 2;
+ break;
+ }
+ }
+ if (params->flags & SKBEDIT_F_QUEUE_MAPPING &&
+ skb->dev->real_num_tx_queues > params->queue_mapping) {
+#ifdef CONFIG_NET_EGRESS
+ netdev_xmit_skip_txqueue(true);
+#endif
+ skb_set_queue_mapping(skb, tcf_skbedit_hash(params, skb));
+ }
+ if (params->flags & SKBEDIT_F_MARK) {
+ skb->mark &= ~params->mask;
+ skb->mark |= params->mark & params->mask;
+ }
+ if (params->flags & SKBEDIT_F_PTYPE)
+ skb->pkt_type = params->ptype;
+ return action;
+
+err:
+ qstats_drop_inc(this_cpu_ptr(d->common.cpu_qstats));
+ return TC_ACT_SHOT;
+}
+
+static void tcf_skbedit_stats_update(struct tc_action *a, u64 bytes,
+ u64 packets, u64 drops,
+ u64 lastuse, bool hw)
+{
+ struct tcf_skbedit *d = to_skbedit(a);
+ struct tcf_t *tm = &d->tcf_tm;
+
+ tcf_action_update_stats(a, bytes, packets, drops, hw);
+ tm->lastuse = max_t(u64, tm->lastuse, lastuse);
+}
+
+static const struct nla_policy skbedit_policy[TCA_SKBEDIT_MAX + 1] = {
+ [TCA_SKBEDIT_PARMS] = { .len = sizeof(struct tc_skbedit) },
+ [TCA_SKBEDIT_PRIORITY] = { .len = sizeof(u32) },
+ [TCA_SKBEDIT_QUEUE_MAPPING] = { .len = sizeof(u16) },
+ [TCA_SKBEDIT_MARK] = { .len = sizeof(u32) },
+ [TCA_SKBEDIT_PTYPE] = { .len = sizeof(u16) },
+ [TCA_SKBEDIT_MASK] = { .len = sizeof(u32) },
+ [TCA_SKBEDIT_FLAGS] = { .len = sizeof(u64) },
+ [TCA_SKBEDIT_QUEUE_MAPPING_MAX] = { .len = sizeof(u16) },
+};
+
+static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
+ struct nlattr *est, struct tc_action **a,
+ struct tcf_proto *tp, u32 act_flags,
+ struct netlink_ext_ack *extack)
+{
+ struct tc_action_net *tn = net_generic(net, act_skbedit_ops.net_id);
+ bool bind = act_flags & TCA_ACT_FLAGS_BIND;
+ struct tcf_skbedit_params *params_new;
+ struct nlattr *tb[TCA_SKBEDIT_MAX + 1];
+ struct tcf_chain *goto_ch = NULL;
+ struct tc_skbedit *parm;
+ struct tcf_skbedit *d;
+ u32 flags = 0, *priority = NULL, *mark = NULL, *mask = NULL;
+ u16 *queue_mapping = NULL, *ptype = NULL;
+ u16 mapping_mod = 1;
+ bool exists = false;
+ int ret = 0, err;
+ u32 index;
+
+ if (nla == NULL)
+ return -EINVAL;
+
+ err = nla_parse_nested_deprecated(tb, TCA_SKBEDIT_MAX, nla,
+ skbedit_policy, NULL);
+ if (err < 0)
+ return err;
+
+ if (tb[TCA_SKBEDIT_PARMS] == NULL)
+ return -EINVAL;
+
+ if (tb[TCA_SKBEDIT_PRIORITY] != NULL) {
+ flags |= SKBEDIT_F_PRIORITY;
+ priority = nla_data(tb[TCA_SKBEDIT_PRIORITY]);
+ }
+
+ if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) {
+ if (is_tcf_skbedit_ingress(act_flags) &&
+ !(act_flags & TCA_ACT_FLAGS_SKIP_SW)) {
+ NL_SET_ERR_MSG_MOD(extack, "\"queue_mapping\" option on receive side is hardware only, use skip_sw");
+ return -EOPNOTSUPP;
+ }
+ flags |= SKBEDIT_F_QUEUE_MAPPING;
+ queue_mapping = nla_data(tb[TCA_SKBEDIT_QUEUE_MAPPING]);
+ }
+
+ if (tb[TCA_SKBEDIT_PTYPE] != NULL) {
+ ptype = nla_data(tb[TCA_SKBEDIT_PTYPE]);
+ if (!skb_pkt_type_ok(*ptype))
+ return -EINVAL;
+ flags |= SKBEDIT_F_PTYPE;
+ }
+
+ if (tb[TCA_SKBEDIT_MARK] != NULL) {
+ flags |= SKBEDIT_F_MARK;
+ mark = nla_data(tb[TCA_SKBEDIT_MARK]);
+ }
+
+ if (tb[TCA_SKBEDIT_MASK] != NULL) {
+ flags |= SKBEDIT_F_MASK;
+ mask = nla_data(tb[TCA_SKBEDIT_MASK]);
+ }
+
+ if (tb[TCA_SKBEDIT_FLAGS] != NULL) {
+ u64 *pure_flags = nla_data(tb[TCA_SKBEDIT_FLAGS]);
+
+ if (*pure_flags & SKBEDIT_F_TXQ_SKBHASH) {
+ u16 *queue_mapping_max;
+
+ if (!tb[TCA_SKBEDIT_QUEUE_MAPPING] ||
+ !tb[TCA_SKBEDIT_QUEUE_MAPPING_MAX]) {
+ NL_SET_ERR_MSG_MOD(extack, "Missing required range of queue_mapping.");
+ return -EINVAL;
+ }
+
+ queue_mapping_max =
+ nla_data(tb[TCA_SKBEDIT_QUEUE_MAPPING_MAX]);
+ if (*queue_mapping_max < *queue_mapping) {
+ NL_SET_ERR_MSG_MOD(extack, "The range of queue_mapping is invalid, max < min.");
+ return -EINVAL;
+ }
+
+ mapping_mod = *queue_mapping_max - *queue_mapping + 1;
+ flags |= SKBEDIT_F_TXQ_SKBHASH;
+ }
+ if (*pure_flags & SKBEDIT_F_INHERITDSFIELD)
+ flags |= SKBEDIT_F_INHERITDSFIELD;
+ }
+
+ parm = nla_data(tb[TCA_SKBEDIT_PARMS]);
+ index = parm->index;
+ err = tcf_idr_check_alloc(tn, &index, a, bind);
+ if (err < 0)
+ return err;
+ exists = err;
+ if (exists && bind)
+ return 0;
+
+ if (!flags) {
+ if (exists)
+ tcf_idr_release(*a, bind);
+ else
+ tcf_idr_cleanup(tn, index);
+ return -EINVAL;
+ }
+
+ if (!exists) {
+ ret = tcf_idr_create(tn, index, est, a,
+ &act_skbedit_ops, bind, true, act_flags);
+ if (ret) {
+ tcf_idr_cleanup(tn, index);
+ return ret;
+ }
+
+ d = to_skbedit(*a);
+ ret = ACT_P_CREATED;
+ } else {
+ d = to_skbedit(*a);
+ if (!(act_flags & TCA_ACT_FLAGS_REPLACE)) {
+ tcf_idr_release(*a, bind);
+ return -EEXIST;
+ }
+ }
+ err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
+ if (err < 0)
+ goto release_idr;
+
+ params_new = kzalloc(sizeof(*params_new), GFP_KERNEL);
+ if (unlikely(!params_new)) {
+ err = -ENOMEM;
+ goto put_chain;
+ }
+
+ params_new->flags = flags;
+ if (flags & SKBEDIT_F_PRIORITY)
+ params_new->priority = *priority;
+ if (flags & SKBEDIT_F_QUEUE_MAPPING) {
+ params_new->queue_mapping = *queue_mapping;
+ params_new->mapping_mod = mapping_mod;
+ }
+ if (flags & SKBEDIT_F_MARK)
+ params_new->mark = *mark;
+ if (flags & SKBEDIT_F_PTYPE)
+ params_new->ptype = *ptype;
+ /* default behaviour is to use all the bits */
+ params_new->mask = 0xffffffff;
+ if (flags & SKBEDIT_F_MASK)
+ params_new->mask = *mask;
+
+ spin_lock_bh(&d->tcf_lock);
+ goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
+ params_new = rcu_replace_pointer(d->params, params_new,
+ lockdep_is_held(&d->tcf_lock));
+ spin_unlock_bh(&d->tcf_lock);
+ if (params_new)
+ kfree_rcu(params_new, rcu);
+ if (goto_ch)
+ tcf_chain_put_by_act(goto_ch);
+
+ return ret;
+put_chain:
+ if (goto_ch)
+ tcf_chain_put_by_act(goto_ch);
+release_idr:
+ tcf_idr_release(*a, bind);
+ return err;
+}
+
+static int tcf_skbedit_dump(struct sk_buff *skb, struct tc_action *a,
+ int bind, int ref)
+{
+ unsigned char *b = skb_tail_pointer(skb);
+ struct tcf_skbedit *d = to_skbedit(a);
+ struct tcf_skbedit_params *params;
+ struct tc_skbedit opt = {
+ .index = d->tcf_index,
+ .refcnt = refcount_read(&d->tcf_refcnt) - ref,
+ .bindcnt = atomic_read(&d->tcf_bindcnt) - bind,
+ };
+ u64 pure_flags = 0;
+ struct tcf_t t;
+
+ spin_lock_bh(&d->tcf_lock);
+ params = rcu_dereference_protected(d->params,
+ lockdep_is_held(&d->tcf_lock));
+ opt.action = d->tcf_action;
+
+ if (nla_put(skb, TCA_SKBEDIT_PARMS, sizeof(opt), &opt))
+ goto nla_put_failure;
+ if ((params->flags & SKBEDIT_F_PRIORITY) &&
+ nla_put_u32(skb, TCA_SKBEDIT_PRIORITY, params->priority))
+ goto nla_put_failure;
+ if ((params->flags & SKBEDIT_F_QUEUE_MAPPING) &&
+ nla_put_u16(skb, TCA_SKBEDIT_QUEUE_MAPPING, params->queue_mapping))
+ goto nla_put_failure;
+ if ((params->flags & SKBEDIT_F_MARK) &&
+ nla_put_u32(skb, TCA_SKBEDIT_MARK, params->mark))
+ goto nla_put_failure;
+ if ((params->flags & SKBEDIT_F_PTYPE) &&
+ nla_put_u16(skb, TCA_SKBEDIT_PTYPE, params->ptype))
+ goto nla_put_failure;
+ if ((params->flags & SKBEDIT_F_MASK) &&
+ nla_put_u32(skb, TCA_SKBEDIT_MASK, params->mask))
+ goto nla_put_failure;
+ if (params->flags & SKBEDIT_F_INHERITDSFIELD)
+ pure_flags |= SKBEDIT_F_INHERITDSFIELD;
+ if (params->flags & SKBEDIT_F_TXQ_SKBHASH) {
+ if (nla_put_u16(skb, TCA_SKBEDIT_QUEUE_MAPPING_MAX,
+ params->queue_mapping + params->mapping_mod - 1))
+ goto nla_put_failure;
+
+ pure_flags |= SKBEDIT_F_TXQ_SKBHASH;
+ }
+ if (pure_flags != 0 &&
+ nla_put(skb, TCA_SKBEDIT_FLAGS, sizeof(pure_flags), &pure_flags))
+ goto nla_put_failure;
+
+ tcf_tm_dump(&t, &d->tcf_tm);
+ if (nla_put_64bit(skb, TCA_SKBEDIT_TM, sizeof(t), &t, TCA_SKBEDIT_PAD))
+ goto nla_put_failure;
+ spin_unlock_bh(&d->tcf_lock);
+
+ return skb->len;
+
+nla_put_failure:
+ spin_unlock_bh(&d->tcf_lock);
+ nlmsg_trim(skb, b);
+ return -1;
+}
+
+static void tcf_skbedit_cleanup(struct tc_action *a)
+{
+ struct tcf_skbedit *d = to_skbedit(a);
+ struct tcf_skbedit_params *params;
+
+ params = rcu_dereference_protected(d->params, 1);
+ if (params)
+ kfree_rcu(params, rcu);
+}
+
+static size_t tcf_skbedit_get_fill_size(const struct tc_action *act)
+{
+ return nla_total_size(sizeof(struct tc_skbedit))
+ + nla_total_size(sizeof(u32)) /* TCA_SKBEDIT_PRIORITY */
+ + nla_total_size(sizeof(u16)) /* TCA_SKBEDIT_QUEUE_MAPPING */
+ + nla_total_size(sizeof(u16)) /* TCA_SKBEDIT_QUEUE_MAPPING_MAX */
+ + nla_total_size(sizeof(u32)) /* TCA_SKBEDIT_MARK */
+ + nla_total_size(sizeof(u16)) /* TCA_SKBEDIT_PTYPE */
+ + nla_total_size(sizeof(u32)) /* TCA_SKBEDIT_MASK */
+ + nla_total_size_64bit(sizeof(u64)); /* TCA_SKBEDIT_FLAGS */
+}
+
+static int tcf_skbedit_offload_act_setup(struct tc_action *act, void *entry_data,
+ u32 *index_inc, bool bind,
+ struct netlink_ext_ack *extack)
+{
+ if (bind) {
+ struct flow_action_entry *entry = entry_data;
+
+ if (is_tcf_skbedit_mark(act)) {
+ entry->id = FLOW_ACTION_MARK;
+ entry->mark = tcf_skbedit_mark(act);
+ } else if (is_tcf_skbedit_ptype(act)) {
+ entry->id = FLOW_ACTION_PTYPE;
+ entry->ptype = tcf_skbedit_ptype(act);
+ } else if (is_tcf_skbedit_priority(act)) {
+ entry->id = FLOW_ACTION_PRIORITY;
+ entry->priority = tcf_skbedit_priority(act);
+ } else if (is_tcf_skbedit_tx_queue_mapping(act)) {
+ NL_SET_ERR_MSG_MOD(extack, "Offload not supported when \"queue_mapping\" option is used on transmit side");
+ return -EOPNOTSUPP;
+ } else if (is_tcf_skbedit_rx_queue_mapping(act)) {
+ entry->id = FLOW_ACTION_RX_QUEUE_MAPPING;
+ entry->rx_queue = tcf_skbedit_rx_queue_mapping(act);
+ } else if (is_tcf_skbedit_inheritdsfield(act)) {
+ NL_SET_ERR_MSG_MOD(extack, "Offload not supported when \"inheritdsfield\" option is used");
+ return -EOPNOTSUPP;
+ } else {
+ NL_SET_ERR_MSG_MOD(extack, "Unsupported skbedit option offload");
+ return -EOPNOTSUPP;
+ }
+ *index_inc = 1;
+ } else {
+ struct flow_offload_action *fl_action = entry_data;
+
+ if (is_tcf_skbedit_mark(act))
+ fl_action->id = FLOW_ACTION_MARK;
+ else if (is_tcf_skbedit_ptype(act))
+ fl_action->id = FLOW_ACTION_PTYPE;
+ else if (is_tcf_skbedit_priority(act))
+ fl_action->id = FLOW_ACTION_PRIORITY;
+ else if (is_tcf_skbedit_rx_queue_mapping(act))
+ fl_action->id = FLOW_ACTION_RX_QUEUE_MAPPING;
+ else
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static struct tc_action_ops act_skbedit_ops = {
+ .kind = "skbedit",
+ .id = TCA_ID_SKBEDIT,
+ .owner = THIS_MODULE,
+ .act = tcf_skbedit_act,
+ .stats_update = tcf_skbedit_stats_update,
+ .dump = tcf_skbedit_dump,
+ .init = tcf_skbedit_init,
+ .cleanup = tcf_skbedit_cleanup,
+ .get_fill_size = tcf_skbedit_get_fill_size,
+ .offload_act_setup = tcf_skbedit_offload_act_setup,
+ .size = sizeof(struct tcf_skbedit),
+};
+
+static __net_init int skbedit_init_net(struct net *net)
+{
+ struct tc_action_net *tn = net_generic(net, act_skbedit_ops.net_id);
+
+ return tc_action_net_init(net, tn, &act_skbedit_ops);
+}
+
+static void __net_exit skbedit_exit_net(struct list_head *net_list)
+{
+ tc_action_net_exit(net_list, act_skbedit_ops.net_id);
+}
+
+static struct pernet_operations skbedit_net_ops = {
+ .init = skbedit_init_net,
+ .exit_batch = skbedit_exit_net,
+ .id = &act_skbedit_ops.net_id,
+ .size = sizeof(struct tc_action_net),
+};
+
+MODULE_AUTHOR("Alexander Duyck, <alexander.h.duyck@intel.com>");
+MODULE_DESCRIPTION("SKB Editing");
+MODULE_LICENSE("GPL");
+
+static int __init skbedit_init_module(void)
+{
+ return tcf_register_action(&act_skbedit_ops, &skbedit_net_ops);
+}
+
+static void __exit skbedit_cleanup_module(void)
+{
+ tcf_unregister_action(&act_skbedit_ops, &skbedit_net_ops);
+}
+
+module_init(skbedit_init_module);
+module_exit(skbedit_cleanup_module);