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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /include/net/pkt_cls.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/net/pkt_cls.h')
-rw-r--r--include/net/pkt_cls.h1069
1 files changed, 1069 insertions, 0 deletions
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
new file mode 100644
index 000000000..4cabb32a2
--- /dev/null
+++ b/include/net/pkt_cls.h
@@ -0,0 +1,1069 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NET_PKT_CLS_H
+#define __NET_PKT_CLS_H
+
+#include <linux/pkt_cls.h>
+#include <linux/workqueue.h>
+#include <net/sch_generic.h>
+#include <net/act_api.h>
+#include <net/net_namespace.h>
+
+/* TC action not accessible from user space */
+#define TC_ACT_CONSUMED (TC_ACT_VALUE_MAX + 1)
+
+/* Basic packet classifier frontend definitions. */
+
+struct tcf_walker {
+ int stop;
+ int skip;
+ int count;
+ bool nonempty;
+ unsigned long cookie;
+ int (*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
+};
+
+int register_tcf_proto_ops(struct tcf_proto_ops *ops);
+void unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
+
+struct tcf_block_ext_info {
+ enum flow_block_binder_type binder_type;
+ tcf_chain_head_change_t *chain_head_change;
+ void *chain_head_change_priv;
+ u32 block_index;
+};
+
+struct tcf_qevent {
+ struct tcf_block *block;
+ struct tcf_block_ext_info info;
+ struct tcf_proto __rcu *filter_chain;
+};
+
+struct tcf_block_cb;
+bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
+
+#ifdef CONFIG_NET_CLS
+struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
+ u32 chain_index);
+void tcf_chain_put_by_act(struct tcf_chain *chain);
+struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
+ struct tcf_chain *chain);
+struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
+ struct tcf_proto *tp);
+void tcf_block_netif_keep_dst(struct tcf_block *block);
+int tcf_block_get(struct tcf_block **p_block,
+ struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
+ struct netlink_ext_ack *extack);
+int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
+ struct tcf_block_ext_info *ei,
+ struct netlink_ext_ack *extack);
+void tcf_block_put(struct tcf_block *block);
+void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
+ struct tcf_block_ext_info *ei);
+
+static inline bool tcf_block_shared(struct tcf_block *block)
+{
+ return block->index;
+}
+
+static inline bool tcf_block_non_null_shared(struct tcf_block *block)
+{
+ return block && block->index;
+}
+
+static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
+{
+ WARN_ON(tcf_block_shared(block));
+ return block->q;
+}
+
+int tcf_classify(struct sk_buff *skb,
+ const struct tcf_block *block,
+ const struct tcf_proto *tp, struct tcf_result *res,
+ bool compat_mode);
+
+static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
+ struct tcf_walker *arg,
+ void *filter)
+{
+ if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
+ arg->stop = 1;
+ return false;
+ }
+
+ arg->count++;
+ return true;
+}
+
+#else
+static inline bool tcf_block_shared(struct tcf_block *block)
+{
+ return false;
+}
+
+static inline bool tcf_block_non_null_shared(struct tcf_block *block)
+{
+ return false;
+}
+
+static inline
+int tcf_block_get(struct tcf_block **p_block,
+ struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
+ struct netlink_ext_ack *extack)
+{
+ return 0;
+}
+
+static inline
+int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
+ struct tcf_block_ext_info *ei,
+ struct netlink_ext_ack *extack)
+{
+ return 0;
+}
+
+static inline void tcf_block_put(struct tcf_block *block)
+{
+}
+
+static inline
+void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
+ struct tcf_block_ext_info *ei)
+{
+}
+
+static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
+{
+ return NULL;
+}
+
+static inline
+int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
+ void *cb_priv)
+{
+ return 0;
+}
+
+static inline
+void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
+ void *cb_priv)
+{
+}
+
+static inline int tcf_classify(struct sk_buff *skb,
+ const struct tcf_block *block,
+ const struct tcf_proto *tp,
+ struct tcf_result *res, bool compat_mode)
+{
+ return TC_ACT_UNSPEC;
+}
+
+#endif
+
+static inline unsigned long
+__cls_set_class(unsigned long *clp, unsigned long cl)
+{
+ return xchg(clp, cl);
+}
+
+static inline void
+__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
+{
+ unsigned long cl;
+
+ cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
+ cl = __cls_set_class(&r->class, cl);
+ if (cl)
+ q->ops->cl_ops->unbind_tcf(q, cl);
+}
+
+static inline void
+tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
+{
+ struct Qdisc *q = tp->chain->block->q;
+
+ /* Check q as it is not set for shared blocks. In that case,
+ * setting class is not supported.
+ */
+ if (!q)
+ return;
+ sch_tree_lock(q);
+ __tcf_bind_filter(q, r, base);
+ sch_tree_unlock(q);
+}
+
+static inline void
+__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
+{
+ unsigned long cl;
+
+ if ((cl = __cls_set_class(&r->class, 0)) != 0)
+ q->ops->cl_ops->unbind_tcf(q, cl);
+}
+
+static inline void
+tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
+{
+ struct Qdisc *q = tp->chain->block->q;
+
+ if (!q)
+ return;
+ __tcf_unbind_filter(q, r);
+}
+
+static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
+ void *q, struct tcf_result *res,
+ unsigned long base)
+{
+ if (res->classid == classid) {
+ if (cl)
+ __tcf_bind_filter(q, res, base);
+ else
+ __tcf_unbind_filter(q, res);
+ }
+}
+
+struct tcf_exts {
+#ifdef CONFIG_NET_CLS_ACT
+ __u32 type; /* for backward compat(TCA_OLD_COMPAT) */
+ int nr_actions;
+ struct tc_action **actions;
+ struct net *net;
+ netns_tracker ns_tracker;
+#endif
+ /* Map to export classifier specific extension TLV types to the
+ * generic extensions API. Unsupported extensions must be set to 0.
+ */
+ int action;
+ int police;
+};
+
+static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
+ int action, int police)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ exts->type = 0;
+ exts->nr_actions = 0;
+ /* Note: we do not own yet a reference on net.
+ * This reference might be taken later from tcf_exts_get_net().
+ */
+ exts->net = net;
+ exts->actions = kcalloc(TCA_ACT_MAX_PRIO, sizeof(struct tc_action *),
+ GFP_KERNEL);
+ if (!exts->actions)
+ return -ENOMEM;
+#endif
+ exts->action = action;
+ exts->police = police;
+ return 0;
+}
+
+/* Return false if the netns is being destroyed in cleanup_net(). Callers
+ * need to do cleanup synchronously in this case, otherwise may race with
+ * tc_action_net_exit(). Return true for other cases.
+ */
+static inline bool tcf_exts_get_net(struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ exts->net = maybe_get_net(exts->net);
+ if (exts->net)
+ netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL);
+ return exts->net != NULL;
+#else
+ return true;
+#endif
+}
+
+static inline void tcf_exts_put_net(struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ if (exts->net)
+ put_net_track(exts->net, &exts->ns_tracker);
+#endif
+}
+
+#ifdef CONFIG_NET_CLS_ACT
+#define tcf_exts_for_each_action(i, a, exts) \
+ for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
+#else
+#define tcf_exts_for_each_action(i, a, exts) \
+ for (; 0; (void)(i), (void)(a), (void)(exts))
+#endif
+
+#define tcf_act_for_each_action(i, a, actions) \
+ for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
+
+static inline void
+tcf_exts_hw_stats_update(const struct tcf_exts *exts,
+ u64 bytes, u64 packets, u64 drops, u64 lastuse,
+ u8 used_hw_stats, bool used_hw_stats_valid)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ int i;
+
+ for (i = 0; i < exts->nr_actions; i++) {
+ struct tc_action *a = exts->actions[i];
+
+ /* if stats from hw, just skip */
+ if (tcf_action_update_hw_stats(a)) {
+ preempt_disable();
+ tcf_action_stats_update(a, bytes, packets, drops,
+ lastuse, true);
+ preempt_enable();
+
+ a->used_hw_stats = used_hw_stats;
+ a->used_hw_stats_valid = used_hw_stats_valid;
+ }
+ }
+#endif
+}
+
+/**
+ * tcf_exts_has_actions - check if at least one action is present
+ * @exts: tc filter extensions handle
+ *
+ * Returns true if at least one action is present.
+ */
+static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ return exts->nr_actions;
+#else
+ return false;
+#endif
+}
+
+/**
+ * tcf_exts_exec - execute tc filter extensions
+ * @skb: socket buffer
+ * @exts: tc filter extensions handle
+ * @res: desired result
+ *
+ * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
+ * a negative number if the filter must be considered unmatched or
+ * a positive action code (TC_ACT_*) which must be returned to the
+ * underlying layer.
+ */
+static inline int
+tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
+ struct tcf_result *res)
+{
+#ifdef CONFIG_NET_CLS_ACT
+ return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
+#endif
+ return TC_ACT_OK;
+}
+
+int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
+ struct nlattr **tb, struct nlattr *rate_tlv,
+ struct tcf_exts *exts, u32 flags,
+ struct netlink_ext_ack *extack);
+int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
+ struct nlattr *rate_tlv, struct tcf_exts *exts,
+ u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
+void tcf_exts_destroy(struct tcf_exts *exts);
+void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
+int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
+int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
+int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
+
+/**
+ * struct tcf_pkt_info - packet information
+ *
+ * @ptr: start of the pkt data
+ * @nexthdr: offset of the next header
+ */
+struct tcf_pkt_info {
+ unsigned char * ptr;
+ int nexthdr;
+};
+
+#ifdef CONFIG_NET_EMATCH
+
+struct tcf_ematch_ops;
+
+/**
+ * struct tcf_ematch - extended match (ematch)
+ *
+ * @matchid: identifier to allow userspace to reidentify a match
+ * @flags: flags specifying attributes and the relation to other matches
+ * @ops: the operations lookup table of the corresponding ematch module
+ * @datalen: length of the ematch specific configuration data
+ * @data: ematch specific data
+ * @net: the network namespace
+ */
+struct tcf_ematch {
+ struct tcf_ematch_ops * ops;
+ unsigned long data;
+ unsigned int datalen;
+ u16 matchid;
+ u16 flags;
+ struct net *net;
+};
+
+static inline int tcf_em_is_container(struct tcf_ematch *em)
+{
+ return !em->ops;
+}
+
+static inline int tcf_em_is_simple(struct tcf_ematch *em)
+{
+ return em->flags & TCF_EM_SIMPLE;
+}
+
+static inline int tcf_em_is_inverted(struct tcf_ematch *em)
+{
+ return em->flags & TCF_EM_INVERT;
+}
+
+static inline int tcf_em_last_match(struct tcf_ematch *em)
+{
+ return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
+}
+
+static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
+{
+ if (tcf_em_last_match(em))
+ return 1;
+
+ if (result == 0 && em->flags & TCF_EM_REL_AND)
+ return 1;
+
+ if (result != 0 && em->flags & TCF_EM_REL_OR)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * struct tcf_ematch_tree - ematch tree handle
+ *
+ * @hdr: ematch tree header supplied by userspace
+ * @matches: array of ematches
+ */
+struct tcf_ematch_tree {
+ struct tcf_ematch_tree_hdr hdr;
+ struct tcf_ematch * matches;
+
+};
+
+/**
+ * struct tcf_ematch_ops - ematch module operations
+ *
+ * @kind: identifier (kind) of this ematch module
+ * @datalen: length of expected configuration data (optional)
+ * @change: called during validation (optional)
+ * @match: called during ematch tree evaluation, must return 1/0
+ * @destroy: called during destroyage (optional)
+ * @dump: called during dumping process (optional)
+ * @owner: owner, must be set to THIS_MODULE
+ * @link: link to previous/next ematch module (internal use)
+ */
+struct tcf_ematch_ops {
+ int kind;
+ int datalen;
+ int (*change)(struct net *net, void *,
+ int, struct tcf_ematch *);
+ int (*match)(struct sk_buff *, struct tcf_ematch *,
+ struct tcf_pkt_info *);
+ void (*destroy)(struct tcf_ematch *);
+ int (*dump)(struct sk_buff *, struct tcf_ematch *);
+ struct module *owner;
+ struct list_head link;
+};
+
+int tcf_em_register(struct tcf_ematch_ops *);
+void tcf_em_unregister(struct tcf_ematch_ops *);
+int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
+ struct tcf_ematch_tree *);
+void tcf_em_tree_destroy(struct tcf_ematch_tree *);
+int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
+int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
+ struct tcf_pkt_info *);
+
+/**
+ * tcf_em_tree_match - evaulate an ematch tree
+ *
+ * @skb: socket buffer of the packet in question
+ * @tree: ematch tree to be used for evaluation
+ * @info: packet information examined by classifier
+ *
+ * This function matches @skb against the ematch tree in @tree by going
+ * through all ematches respecting their logic relations returning
+ * as soon as the result is obvious.
+ *
+ * Returns 1 if the ematch tree as-one matches, no ematches are configured
+ * or ematch is not enabled in the kernel, otherwise 0 is returned.
+ */
+static inline int tcf_em_tree_match(struct sk_buff *skb,
+ struct tcf_ematch_tree *tree,
+ struct tcf_pkt_info *info)
+{
+ if (tree->hdr.nmatches)
+ return __tcf_em_tree_match(skb, tree, info);
+ else
+ return 1;
+}
+
+#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
+
+#else /* CONFIG_NET_EMATCH */
+
+struct tcf_ematch_tree {
+};
+
+#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
+#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
+#define tcf_em_tree_dump(skb, t, tlv) (0)
+#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
+
+#endif /* CONFIG_NET_EMATCH */
+
+static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
+{
+ switch (layer) {
+ case TCF_LAYER_LINK:
+ return skb_mac_header(skb);
+ case TCF_LAYER_NETWORK:
+ return skb_network_header(skb);
+ case TCF_LAYER_TRANSPORT:
+ return skb_transport_header(skb);
+ }
+
+ return NULL;
+}
+
+static inline int tcf_valid_offset(const struct sk_buff *skb,
+ const unsigned char *ptr, const int len)
+{
+ return likely((ptr + len) <= skb_tail_pointer(skb) &&
+ ptr >= skb->head &&
+ (ptr <= (ptr + len)));
+}
+
+static inline int
+tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
+ struct netlink_ext_ack *extack)
+{
+ char indev[IFNAMSIZ];
+ struct net_device *dev;
+
+ if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
+ NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
+ "Interface name too long");
+ return -EINVAL;
+ }
+ dev = __dev_get_by_name(net, indev);
+ if (!dev) {
+ NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
+ "Network device not found");
+ return -ENODEV;
+ }
+ return dev->ifindex;
+}
+
+static inline bool
+tcf_match_indev(struct sk_buff *skb, int ifindex)
+{
+ if (!ifindex)
+ return true;
+ if (!skb->skb_iif)
+ return false;
+ return ifindex == skb->skb_iif;
+}
+
+int tc_setup_offload_action(struct flow_action *flow_action,
+ const struct tcf_exts *exts,
+ struct netlink_ext_ack *extack);
+void tc_cleanup_offload_action(struct flow_action *flow_action);
+int tc_setup_action(struct flow_action *flow_action,
+ struct tc_action *actions[],
+ struct netlink_ext_ack *extack);
+
+int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
+ void *type_data, bool err_stop, bool rtnl_held);
+int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
+ enum tc_setup_type type, void *type_data, bool err_stop,
+ u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
+int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
+ enum tc_setup_type type, void *type_data, bool err_stop,
+ u32 *old_flags, unsigned int *old_in_hw_count,
+ u32 *new_flags, unsigned int *new_in_hw_count,
+ bool rtnl_held);
+int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
+ enum tc_setup_type type, void *type_data, bool err_stop,
+ u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
+int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
+ bool add, flow_setup_cb_t *cb,
+ enum tc_setup_type type, void *type_data,
+ void *cb_priv, u32 *flags, unsigned int *in_hw_count);
+unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
+
+#ifdef CONFIG_NET_CLS_ACT
+int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
+ enum flow_block_binder_type binder_type,
+ struct nlattr *block_index_attr,
+ struct netlink_ext_ack *extack);
+void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
+int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
+ struct netlink_ext_ack *extack);
+struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
+ struct sk_buff **to_free, int *ret);
+int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
+#else
+static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
+ enum flow_block_binder_type binder_type,
+ struct nlattr *block_index_attr,
+ struct netlink_ext_ack *extack)
+{
+ return 0;
+}
+
+static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
+{
+}
+
+static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
+ struct netlink_ext_ack *extack)
+{
+ return 0;
+}
+
+static inline struct sk_buff *
+tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
+ struct sk_buff **to_free, int *ret)
+{
+ return skb;
+}
+
+static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
+{
+ return 0;
+}
+#endif
+
+struct tc_cls_u32_knode {
+ struct tcf_exts *exts;
+ struct tcf_result *res;
+ struct tc_u32_sel *sel;
+ u32 handle;
+ u32 val;
+ u32 mask;
+ u32 link_handle;
+ u8 fshift;
+};
+
+struct tc_cls_u32_hnode {
+ u32 handle;
+ u32 prio;
+ unsigned int divisor;
+};
+
+enum tc_clsu32_command {
+ TC_CLSU32_NEW_KNODE,
+ TC_CLSU32_REPLACE_KNODE,
+ TC_CLSU32_DELETE_KNODE,
+ TC_CLSU32_NEW_HNODE,
+ TC_CLSU32_REPLACE_HNODE,
+ TC_CLSU32_DELETE_HNODE,
+};
+
+struct tc_cls_u32_offload {
+ struct flow_cls_common_offload common;
+ /* knode values */
+ enum tc_clsu32_command command;
+ union {
+ struct tc_cls_u32_knode knode;
+ struct tc_cls_u32_hnode hnode;
+ };
+};
+
+static inline bool tc_can_offload(const struct net_device *dev)
+{
+ return dev->features & NETIF_F_HW_TC;
+}
+
+static inline bool tc_can_offload_extack(const struct net_device *dev,
+ struct netlink_ext_ack *extack)
+{
+ bool can = tc_can_offload(dev);
+
+ if (!can)
+ NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
+
+ return can;
+}
+
+static inline bool
+tc_cls_can_offload_and_chain0(const struct net_device *dev,
+ struct flow_cls_common_offload *common)
+{
+ if (!tc_can_offload_extack(dev, common->extack))
+ return false;
+ if (common->chain_index) {
+ NL_SET_ERR_MSG(common->extack,
+ "Driver supports only offload of chain 0");
+ return false;
+ }
+ return true;
+}
+
+static inline bool tc_skip_hw(u32 flags)
+{
+ return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
+}
+
+static inline bool tc_skip_sw(u32 flags)
+{
+ return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
+}
+
+/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
+static inline bool tc_flags_valid(u32 flags)
+{
+ if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
+ TCA_CLS_FLAGS_VERBOSE))
+ return false;
+
+ flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
+ if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
+ return false;
+
+ return true;
+}
+
+static inline bool tc_in_hw(u32 flags)
+{
+ return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
+}
+
+static inline void
+tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
+ const struct tcf_proto *tp, u32 flags,
+ struct netlink_ext_ack *extack)
+{
+ cls_common->chain_index = tp->chain->index;
+ cls_common->protocol = tp->protocol;
+ cls_common->prio = tp->prio >> 16;
+ if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
+ cls_common->extack = extack;
+}
+
+#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
+static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
+{
+ struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
+
+ if (tc_skb_ext)
+ memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
+ return tc_skb_ext;
+}
+#endif
+
+enum tc_matchall_command {
+ TC_CLSMATCHALL_REPLACE,
+ TC_CLSMATCHALL_DESTROY,
+ TC_CLSMATCHALL_STATS,
+};
+
+struct tc_cls_matchall_offload {
+ struct flow_cls_common_offload common;
+ enum tc_matchall_command command;
+ struct flow_rule *rule;
+ struct flow_stats stats;
+ unsigned long cookie;
+};
+
+enum tc_clsbpf_command {
+ TC_CLSBPF_OFFLOAD,
+ TC_CLSBPF_STATS,
+};
+
+struct tc_cls_bpf_offload {
+ struct flow_cls_common_offload common;
+ enum tc_clsbpf_command command;
+ struct tcf_exts *exts;
+ struct bpf_prog *prog;
+ struct bpf_prog *oldprog;
+ const char *name;
+ bool exts_integrated;
+};
+
+struct tc_mqprio_qopt_offload {
+ /* struct tc_mqprio_qopt must always be the first element */
+ struct tc_mqprio_qopt qopt;
+ u16 mode;
+ u16 shaper;
+ u32 flags;
+ u64 min_rate[TC_QOPT_MAX_QUEUE];
+ u64 max_rate[TC_QOPT_MAX_QUEUE];
+};
+
+/* This structure holds cookie structure that is passed from user
+ * to the kernel for actions and classifiers
+ */
+struct tc_cookie {
+ u8 *data;
+ u32 len;
+ struct rcu_head rcu;
+};
+
+struct tc_qopt_offload_stats {
+ struct gnet_stats_basic_sync *bstats;
+ struct gnet_stats_queue *qstats;
+};
+
+enum tc_mq_command {
+ TC_MQ_CREATE,
+ TC_MQ_DESTROY,
+ TC_MQ_STATS,
+ TC_MQ_GRAFT,
+};
+
+struct tc_mq_opt_offload_graft_params {
+ unsigned long queue;
+ u32 child_handle;
+};
+
+struct tc_mq_qopt_offload {
+ enum tc_mq_command command;
+ u32 handle;
+ union {
+ struct tc_qopt_offload_stats stats;
+ struct tc_mq_opt_offload_graft_params graft_params;
+ };
+};
+
+enum tc_htb_command {
+ /* Root */
+ TC_HTB_CREATE, /* Initialize HTB offload. */
+ TC_HTB_DESTROY, /* Destroy HTB offload. */
+
+ /* Classes */
+ /* Allocate qid and create leaf. */
+ TC_HTB_LEAF_ALLOC_QUEUE,
+ /* Convert leaf to inner, preserve and return qid, create new leaf. */
+ TC_HTB_LEAF_TO_INNER,
+ /* Delete leaf, while siblings remain. */
+ TC_HTB_LEAF_DEL,
+ /* Delete leaf, convert parent to leaf, preserving qid. */
+ TC_HTB_LEAF_DEL_LAST,
+ /* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
+ TC_HTB_LEAF_DEL_LAST_FORCE,
+ /* Modify parameters of a node. */
+ TC_HTB_NODE_MODIFY,
+
+ /* Class qdisc */
+ TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
+};
+
+struct tc_htb_qopt_offload {
+ struct netlink_ext_ack *extack;
+ enum tc_htb_command command;
+ u32 parent_classid;
+ u16 classid;
+ u16 qid;
+ u64 rate;
+ u64 ceil;
+};
+
+#define TC_HTB_CLASSID_ROOT U32_MAX
+
+enum tc_red_command {
+ TC_RED_REPLACE,
+ TC_RED_DESTROY,
+ TC_RED_STATS,
+ TC_RED_XSTATS,
+ TC_RED_GRAFT,
+};
+
+struct tc_red_qopt_offload_params {
+ u32 min;
+ u32 max;
+ u32 probability;
+ u32 limit;
+ bool is_ecn;
+ bool is_harddrop;
+ bool is_nodrop;
+ struct gnet_stats_queue *qstats;
+};
+
+struct tc_red_qopt_offload {
+ enum tc_red_command command;
+ u32 handle;
+ u32 parent;
+ union {
+ struct tc_red_qopt_offload_params set;
+ struct tc_qopt_offload_stats stats;
+ struct red_stats *xstats;
+ u32 child_handle;
+ };
+};
+
+enum tc_gred_command {
+ TC_GRED_REPLACE,
+ TC_GRED_DESTROY,
+ TC_GRED_STATS,
+};
+
+struct tc_gred_vq_qopt_offload_params {
+ bool present;
+ u32 limit;
+ u32 prio;
+ u32 min;
+ u32 max;
+ bool is_ecn;
+ bool is_harddrop;
+ u32 probability;
+ /* Only need backlog, see struct tc_prio_qopt_offload_params */
+ u32 *backlog;
+};
+
+struct tc_gred_qopt_offload_params {
+ bool grio_on;
+ bool wred_on;
+ unsigned int dp_cnt;
+ unsigned int dp_def;
+ struct gnet_stats_queue *qstats;
+ struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
+};
+
+struct tc_gred_qopt_offload_stats {
+ struct gnet_stats_basic_sync bstats[MAX_DPs];
+ struct gnet_stats_queue qstats[MAX_DPs];
+ struct red_stats *xstats[MAX_DPs];
+};
+
+struct tc_gred_qopt_offload {
+ enum tc_gred_command command;
+ u32 handle;
+ u32 parent;
+ union {
+ struct tc_gred_qopt_offload_params set;
+ struct tc_gred_qopt_offload_stats stats;
+ };
+};
+
+enum tc_prio_command {
+ TC_PRIO_REPLACE,
+ TC_PRIO_DESTROY,
+ TC_PRIO_STATS,
+ TC_PRIO_GRAFT,
+};
+
+struct tc_prio_qopt_offload_params {
+ int bands;
+ u8 priomap[TC_PRIO_MAX + 1];
+ /* At the point of un-offloading the Qdisc, the reported backlog and
+ * qlen need to be reduced by the portion that is in HW.
+ */
+ struct gnet_stats_queue *qstats;
+};
+
+struct tc_prio_qopt_offload_graft_params {
+ u8 band;
+ u32 child_handle;
+};
+
+struct tc_prio_qopt_offload {
+ enum tc_prio_command command;
+ u32 handle;
+ u32 parent;
+ union {
+ struct tc_prio_qopt_offload_params replace_params;
+ struct tc_qopt_offload_stats stats;
+ struct tc_prio_qopt_offload_graft_params graft_params;
+ };
+};
+
+enum tc_root_command {
+ TC_ROOT_GRAFT,
+};
+
+struct tc_root_qopt_offload {
+ enum tc_root_command command;
+ u32 handle;
+ bool ingress;
+};
+
+enum tc_ets_command {
+ TC_ETS_REPLACE,
+ TC_ETS_DESTROY,
+ TC_ETS_STATS,
+ TC_ETS_GRAFT,
+};
+
+struct tc_ets_qopt_offload_replace_params {
+ unsigned int bands;
+ u8 priomap[TC_PRIO_MAX + 1];
+ unsigned int quanta[TCQ_ETS_MAX_BANDS]; /* 0 for strict bands. */
+ unsigned int weights[TCQ_ETS_MAX_BANDS];
+ struct gnet_stats_queue *qstats;
+};
+
+struct tc_ets_qopt_offload_graft_params {
+ u8 band;
+ u32 child_handle;
+};
+
+struct tc_ets_qopt_offload {
+ enum tc_ets_command command;
+ u32 handle;
+ u32 parent;
+ union {
+ struct tc_ets_qopt_offload_replace_params replace_params;
+ struct tc_qopt_offload_stats stats;
+ struct tc_ets_qopt_offload_graft_params graft_params;
+ };
+};
+
+enum tc_tbf_command {
+ TC_TBF_REPLACE,
+ TC_TBF_DESTROY,
+ TC_TBF_STATS,
+ TC_TBF_GRAFT,
+};
+
+struct tc_tbf_qopt_offload_replace_params {
+ struct psched_ratecfg rate;
+ u32 max_size;
+ struct gnet_stats_queue *qstats;
+};
+
+struct tc_tbf_qopt_offload {
+ enum tc_tbf_command command;
+ u32 handle;
+ u32 parent;
+ union {
+ struct tc_tbf_qopt_offload_replace_params replace_params;
+ struct tc_qopt_offload_stats stats;
+ u32 child_handle;
+ };
+};
+
+enum tc_fifo_command {
+ TC_FIFO_REPLACE,
+ TC_FIFO_DESTROY,
+ TC_FIFO_STATS,
+};
+
+struct tc_fifo_qopt_offload {
+ enum tc_fifo_command command;
+ u32 handle;
+ u32 parent;
+ union {
+ struct tc_qopt_offload_stats stats;
+ };
+};
+
+#ifdef CONFIG_NET_CLS_ACT
+DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
+void tc_skb_ext_tc_enable(void);
+void tc_skb_ext_tc_disable(void);
+#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
+#else /* CONFIG_NET_CLS_ACT */
+static inline void tc_skb_ext_tc_enable(void) { }
+static inline void tc_skb_ext_tc_disable(void) { }
+#define tc_skb_ext_tc_enabled() false
+#endif
+
+#endif