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-rw-r--r--include/net/flow_offload.h573
1 files changed, 573 insertions, 0 deletions
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
new file mode 100644
index 000000000..9a58274e6
--- /dev/null
+++ b/include/net/flow_offload.h
@@ -0,0 +1,573 @@
+#ifndef _NET_FLOW_OFFLOAD_H
+#define _NET_FLOW_OFFLOAD_H
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netlink.h>
+#include <net/flow_dissector.h>
+
+struct flow_match {
+ struct flow_dissector *dissector;
+ void *mask;
+ void *key;
+};
+
+struct flow_match_meta {
+ struct flow_dissector_key_meta *key, *mask;
+};
+
+struct flow_match_basic {
+ struct flow_dissector_key_basic *key, *mask;
+};
+
+struct flow_match_control {
+ struct flow_dissector_key_control *key, *mask;
+};
+
+struct flow_match_eth_addrs {
+ struct flow_dissector_key_eth_addrs *key, *mask;
+};
+
+struct flow_match_vlan {
+ struct flow_dissector_key_vlan *key, *mask;
+};
+
+struct flow_match_ipv4_addrs {
+ struct flow_dissector_key_ipv4_addrs *key, *mask;
+};
+
+struct flow_match_ipv6_addrs {
+ struct flow_dissector_key_ipv6_addrs *key, *mask;
+};
+
+struct flow_match_ip {
+ struct flow_dissector_key_ip *key, *mask;
+};
+
+struct flow_match_ports {
+ struct flow_dissector_key_ports *key, *mask;
+};
+
+struct flow_match_icmp {
+ struct flow_dissector_key_icmp *key, *mask;
+};
+
+struct flow_match_tcp {
+ struct flow_dissector_key_tcp *key, *mask;
+};
+
+struct flow_match_mpls {
+ struct flow_dissector_key_mpls *key, *mask;
+};
+
+struct flow_match_enc_keyid {
+ struct flow_dissector_key_keyid *key, *mask;
+};
+
+struct flow_match_enc_opts {
+ struct flow_dissector_key_enc_opts *key, *mask;
+};
+
+struct flow_match_ct {
+ struct flow_dissector_key_ct *key, *mask;
+};
+
+struct flow_rule;
+
+void flow_rule_match_meta(const struct flow_rule *rule,
+ struct flow_match_meta *out);
+void flow_rule_match_basic(const struct flow_rule *rule,
+ struct flow_match_basic *out);
+void flow_rule_match_control(const struct flow_rule *rule,
+ struct flow_match_control *out);
+void flow_rule_match_eth_addrs(const struct flow_rule *rule,
+ struct flow_match_eth_addrs *out);
+void flow_rule_match_vlan(const struct flow_rule *rule,
+ struct flow_match_vlan *out);
+void flow_rule_match_cvlan(const struct flow_rule *rule,
+ struct flow_match_vlan *out);
+void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
+ struct flow_match_ipv4_addrs *out);
+void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
+ struct flow_match_ipv6_addrs *out);
+void flow_rule_match_ip(const struct flow_rule *rule,
+ struct flow_match_ip *out);
+void flow_rule_match_ports(const struct flow_rule *rule,
+ struct flow_match_ports *out);
+void flow_rule_match_tcp(const struct flow_rule *rule,
+ struct flow_match_tcp *out);
+void flow_rule_match_icmp(const struct flow_rule *rule,
+ struct flow_match_icmp *out);
+void flow_rule_match_mpls(const struct flow_rule *rule,
+ struct flow_match_mpls *out);
+void flow_rule_match_enc_control(const struct flow_rule *rule,
+ struct flow_match_control *out);
+void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
+ struct flow_match_ipv4_addrs *out);
+void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
+ struct flow_match_ipv6_addrs *out);
+void flow_rule_match_enc_ip(const struct flow_rule *rule,
+ struct flow_match_ip *out);
+void flow_rule_match_enc_ports(const struct flow_rule *rule,
+ struct flow_match_ports *out);
+void flow_rule_match_enc_keyid(const struct flow_rule *rule,
+ struct flow_match_enc_keyid *out);
+void flow_rule_match_enc_opts(const struct flow_rule *rule,
+ struct flow_match_enc_opts *out);
+void flow_rule_match_ct(const struct flow_rule *rule,
+ struct flow_match_ct *out);
+
+enum flow_action_id {
+ FLOW_ACTION_ACCEPT = 0,
+ FLOW_ACTION_DROP,
+ FLOW_ACTION_TRAP,
+ FLOW_ACTION_GOTO,
+ FLOW_ACTION_REDIRECT,
+ FLOW_ACTION_MIRRED,
+ FLOW_ACTION_REDIRECT_INGRESS,
+ FLOW_ACTION_MIRRED_INGRESS,
+ FLOW_ACTION_VLAN_PUSH,
+ FLOW_ACTION_VLAN_POP,
+ FLOW_ACTION_VLAN_MANGLE,
+ FLOW_ACTION_TUNNEL_ENCAP,
+ FLOW_ACTION_TUNNEL_DECAP,
+ FLOW_ACTION_MANGLE,
+ FLOW_ACTION_ADD,
+ FLOW_ACTION_CSUM,
+ FLOW_ACTION_MARK,
+ FLOW_ACTION_PTYPE,
+ FLOW_ACTION_PRIORITY,
+ FLOW_ACTION_WAKE,
+ FLOW_ACTION_QUEUE,
+ FLOW_ACTION_SAMPLE,
+ FLOW_ACTION_POLICE,
+ FLOW_ACTION_CT,
+ FLOW_ACTION_CT_METADATA,
+ FLOW_ACTION_MPLS_PUSH,
+ FLOW_ACTION_MPLS_POP,
+ FLOW_ACTION_MPLS_MANGLE,
+ FLOW_ACTION_GATE,
+ NUM_FLOW_ACTIONS,
+};
+
+/* This is mirroring enum pedit_header_type definition for easy mapping between
+ * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
+ * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
+ */
+enum flow_action_mangle_base {
+ FLOW_ACT_MANGLE_UNSPEC = 0,
+ FLOW_ACT_MANGLE_HDR_TYPE_ETH,
+ FLOW_ACT_MANGLE_HDR_TYPE_IP4,
+ FLOW_ACT_MANGLE_HDR_TYPE_IP6,
+ FLOW_ACT_MANGLE_HDR_TYPE_TCP,
+ FLOW_ACT_MANGLE_HDR_TYPE_UDP,
+};
+
+enum flow_action_hw_stats_bit {
+ FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
+ FLOW_ACTION_HW_STATS_DELAYED_BIT,
+ FLOW_ACTION_HW_STATS_DISABLED_BIT,
+
+ FLOW_ACTION_HW_STATS_NUM_BITS
+};
+
+enum flow_action_hw_stats {
+ FLOW_ACTION_HW_STATS_IMMEDIATE =
+ BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
+ FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
+ FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
+ FLOW_ACTION_HW_STATS_DELAYED,
+ FLOW_ACTION_HW_STATS_DISABLED =
+ BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
+ FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
+};
+
+typedef void (*action_destr)(void *priv);
+
+struct flow_action_cookie {
+ u32 cookie_len;
+ u8 cookie[];
+};
+
+struct flow_action_cookie *flow_action_cookie_create(void *data,
+ unsigned int len,
+ gfp_t gfp);
+void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
+
+struct flow_action_entry {
+ enum flow_action_id id;
+ enum flow_action_hw_stats hw_stats;
+ action_destr destructor;
+ void *destructor_priv;
+ union {
+ u32 chain_index; /* FLOW_ACTION_GOTO */
+ struct net_device *dev; /* FLOW_ACTION_REDIRECT */
+ struct { /* FLOW_ACTION_VLAN */
+ u16 vid;
+ __be16 proto;
+ u8 prio;
+ } vlan;
+ struct { /* FLOW_ACTION_MANGLE */
+ /* FLOW_ACTION_ADD */
+ enum flow_action_mangle_base htype;
+ u32 offset;
+ u32 mask;
+ u32 val;
+ } mangle;
+ struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
+ u32 csum_flags; /* FLOW_ACTION_CSUM */
+ u32 mark; /* FLOW_ACTION_MARK */
+ u16 ptype; /* FLOW_ACTION_PTYPE */
+ u32 priority; /* FLOW_ACTION_PRIORITY */
+ struct { /* FLOW_ACTION_QUEUE */
+ u32 ctx;
+ u32 index;
+ u8 vf;
+ } queue;
+ struct { /* FLOW_ACTION_SAMPLE */
+ struct psample_group *psample_group;
+ u32 rate;
+ u32 trunc_size;
+ bool truncate;
+ } sample;
+ struct { /* FLOW_ACTION_POLICE */
+ u32 index;
+ u32 burst;
+ u64 rate_bytes_ps;
+ u32 mtu;
+ } police;
+ struct { /* FLOW_ACTION_CT */
+ int action;
+ u16 zone;
+ struct nf_flowtable *flow_table;
+ } ct;
+ struct {
+ unsigned long cookie;
+ u32 mark;
+ u32 labels[4];
+ } ct_metadata;
+ struct { /* FLOW_ACTION_MPLS_PUSH */
+ u32 label;
+ __be16 proto;
+ u8 tc;
+ u8 bos;
+ u8 ttl;
+ } mpls_push;
+ struct { /* FLOW_ACTION_MPLS_POP */
+ __be16 proto;
+ } mpls_pop;
+ struct { /* FLOW_ACTION_MPLS_MANGLE */
+ u32 label;
+ u8 tc;
+ u8 bos;
+ u8 ttl;
+ } mpls_mangle;
+ struct {
+ u32 index;
+ s32 prio;
+ u64 basetime;
+ u64 cycletime;
+ u64 cycletimeext;
+ u32 num_entries;
+ struct action_gate_entry *entries;
+ } gate;
+ };
+ struct flow_action_cookie *cookie; /* user defined action cookie */
+};
+
+struct flow_action {
+ unsigned int num_entries;
+ struct flow_action_entry entries[];
+};
+
+static inline bool flow_action_has_entries(const struct flow_action *action)
+{
+ return action->num_entries;
+}
+
+/**
+ * flow_action_has_one_action() - check if exactly one action is present
+ * @action: tc filter flow offload action
+ *
+ * Returns true if exactly one action is present.
+ */
+static inline bool flow_offload_has_one_action(const struct flow_action *action)
+{
+ return action->num_entries == 1;
+}
+
+#define flow_action_for_each(__i, __act, __actions) \
+ for (__i = 0, __act = &(__actions)->entries[0]; \
+ __i < (__actions)->num_entries; \
+ __act = &(__actions)->entries[++__i])
+
+static inline bool
+flow_action_mixed_hw_stats_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack)
+{
+ const struct flow_action_entry *action_entry;
+ u8 last_hw_stats;
+ int i;
+
+ if (flow_offload_has_one_action(action))
+ return true;
+
+ flow_action_for_each(i, action_entry, action) {
+ if (i && action_entry->hw_stats != last_hw_stats) {
+ NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
+ return false;
+ }
+ last_hw_stats = action_entry->hw_stats;
+ }
+ return true;
+}
+
+static inline const struct flow_action_entry *
+flow_action_first_entry_get(const struct flow_action *action)
+{
+ WARN_ON(!flow_action_has_entries(action));
+ return &action->entries[0];
+}
+
+static inline bool
+__flow_action_hw_stats_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack,
+ bool check_allow_bit,
+ enum flow_action_hw_stats_bit allow_bit)
+{
+ const struct flow_action_entry *action_entry;
+
+ if (!flow_action_has_entries(action))
+ return true;
+ if (!flow_action_mixed_hw_stats_check(action, extack))
+ return false;
+
+ action_entry = flow_action_first_entry_get(action);
+
+ /* Zero is not a legal value for hw_stats, catch anyone passing it */
+ WARN_ON_ONCE(!action_entry->hw_stats);
+
+ if (!check_allow_bit &&
+ ~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
+ NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
+ return false;
+ } else if (check_allow_bit &&
+ !(action_entry->hw_stats & BIT(allow_bit))) {
+ NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
+ return false;
+ }
+ return true;
+}
+
+static inline bool
+flow_action_hw_stats_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack,
+ enum flow_action_hw_stats_bit allow_bit)
+{
+ return __flow_action_hw_stats_check(action, extack, true, allow_bit);
+}
+
+static inline bool
+flow_action_basic_hw_stats_check(const struct flow_action *action,
+ struct netlink_ext_ack *extack)
+{
+ return __flow_action_hw_stats_check(action, extack, false, 0);
+}
+
+struct flow_rule {
+ struct flow_match match;
+ struct flow_action action;
+};
+
+struct flow_rule *flow_rule_alloc(unsigned int num_actions);
+
+static inline bool flow_rule_match_key(const struct flow_rule *rule,
+ enum flow_dissector_key_id key)
+{
+ return dissector_uses_key(rule->match.dissector, key);
+}
+
+struct flow_stats {
+ u64 pkts;
+ u64 bytes;
+ u64 drops;
+ u64 lastused;
+ enum flow_action_hw_stats used_hw_stats;
+ bool used_hw_stats_valid;
+};
+
+static inline void flow_stats_update(struct flow_stats *flow_stats,
+ u64 bytes, u64 pkts,
+ u64 drops, u64 lastused,
+ enum flow_action_hw_stats used_hw_stats)
+{
+ flow_stats->pkts += pkts;
+ flow_stats->bytes += bytes;
+ flow_stats->drops += drops;
+ flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused);
+
+ /* The driver should pass value with a maximum of one bit set.
+ * Passing FLOW_ACTION_HW_STATS_ANY is invalid.
+ */
+ WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
+ flow_stats->used_hw_stats |= used_hw_stats;
+ flow_stats->used_hw_stats_valid = true;
+}
+
+enum flow_block_command {
+ FLOW_BLOCK_BIND,
+ FLOW_BLOCK_UNBIND,
+};
+
+enum flow_block_binder_type {
+ FLOW_BLOCK_BINDER_TYPE_UNSPEC,
+ FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
+ FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
+ FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
+ FLOW_BLOCK_BINDER_TYPE_RED_MARK,
+};
+
+struct flow_block {
+ struct list_head cb_list;
+};
+
+struct netlink_ext_ack;
+
+struct flow_block_offload {
+ enum flow_block_command command;
+ enum flow_block_binder_type binder_type;
+ bool block_shared;
+ bool unlocked_driver_cb;
+ struct net *net;
+ struct flow_block *block;
+ struct list_head cb_list;
+ struct list_head *driver_block_list;
+ struct netlink_ext_ack *extack;
+ struct Qdisc *sch;
+ struct list_head *cb_list_head;
+};
+
+enum tc_setup_type;
+typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
+ void *cb_priv);
+
+struct flow_block_cb;
+
+struct flow_block_indr {
+ struct list_head list;
+ struct net_device *dev;
+ struct Qdisc *sch;
+ enum flow_block_binder_type binder_type;
+ void *data;
+ void *cb_priv;
+ void (*cleanup)(struct flow_block_cb *block_cb);
+};
+
+struct flow_block_cb {
+ struct list_head driver_list;
+ struct list_head list;
+ flow_setup_cb_t *cb;
+ void *cb_ident;
+ void *cb_priv;
+ void (*release)(void *cb_priv);
+ struct flow_block_indr indr;
+ unsigned int refcnt;
+};
+
+struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
+ void *cb_ident, void *cb_priv,
+ void (*release)(void *cb_priv));
+struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
+ void *cb_ident, void *cb_priv,
+ void (*release)(void *cb_priv),
+ struct flow_block_offload *bo,
+ struct net_device *dev,
+ struct Qdisc *sch, void *data,
+ void *indr_cb_priv,
+ void (*cleanup)(struct flow_block_cb *block_cb));
+void flow_block_cb_free(struct flow_block_cb *block_cb);
+
+struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
+ flow_setup_cb_t *cb, void *cb_ident);
+
+void *flow_block_cb_priv(struct flow_block_cb *block_cb);
+void flow_block_cb_incref(struct flow_block_cb *block_cb);
+unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
+
+static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
+ struct flow_block_offload *offload)
+{
+ list_add_tail(&block_cb->list, &offload->cb_list);
+}
+
+static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
+ struct flow_block_offload *offload)
+{
+ list_move(&block_cb->list, &offload->cb_list);
+}
+
+static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
+ struct flow_block_offload *offload)
+{
+ list_del(&block_cb->indr.list);
+ list_move(&block_cb->list, &offload->cb_list);
+}
+
+bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
+ struct list_head *driver_block_list);
+
+int flow_block_cb_setup_simple(struct flow_block_offload *f,
+ struct list_head *driver_list,
+ flow_setup_cb_t *cb,
+ void *cb_ident, void *cb_priv, bool ingress_only);
+
+enum flow_cls_command {
+ FLOW_CLS_REPLACE,
+ FLOW_CLS_DESTROY,
+ FLOW_CLS_STATS,
+ FLOW_CLS_TMPLT_CREATE,
+ FLOW_CLS_TMPLT_DESTROY,
+};
+
+struct flow_cls_common_offload {
+ u32 chain_index;
+ __be16 protocol;
+ u32 prio;
+ struct netlink_ext_ack *extack;
+};
+
+struct flow_cls_offload {
+ struct flow_cls_common_offload common;
+ enum flow_cls_command command;
+ unsigned long cookie;
+ struct flow_rule *rule;
+ struct flow_stats stats;
+ u32 classid;
+};
+
+static inline struct flow_rule *
+flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
+{
+ return flow_cmd->rule;
+}
+
+static inline void flow_block_init(struct flow_block *flow_block)
+{
+ INIT_LIST_HEAD(&flow_block->cb_list);
+}
+
+typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
+ enum tc_setup_type type, void *type_data,
+ void *data,
+ void (*cleanup)(struct flow_block_cb *block_cb));
+
+int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
+void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
+ void (*release)(void *cb_priv));
+int flow_indr_dev_setup_offload(struct net_device *dev, struct Qdisc *sch,
+ enum tc_setup_type type, void *data,
+ struct flow_block_offload *bo,
+ void (*cleanup)(struct flow_block_cb *block_cb));
+bool flow_indr_dev_exists(void);
+
+#endif /* _NET_FLOW_OFFLOAD_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 17:09:55 +0000