618 lines
16 KiB
C
618 lines
16 KiB
C
#ifndef _NET_FLOW_OFFLOAD_H
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#define _NET_FLOW_OFFLOAD_H
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/netlink.h>
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#include <net/flow_dissector.h>
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struct flow_match {
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struct flow_dissector *dissector;
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void *mask;
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void *key;
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};
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struct flow_match_meta {
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struct flow_dissector_key_meta *key, *mask;
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};
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struct flow_match_basic {
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struct flow_dissector_key_basic *key, *mask;
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};
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struct flow_match_control {
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struct flow_dissector_key_control *key, *mask;
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};
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struct flow_match_eth_addrs {
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struct flow_dissector_key_eth_addrs *key, *mask;
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};
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struct flow_match_vlan {
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struct flow_dissector_key_vlan *key, *mask;
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};
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struct flow_match_ipv4_addrs {
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struct flow_dissector_key_ipv4_addrs *key, *mask;
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};
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struct flow_match_ipv6_addrs {
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struct flow_dissector_key_ipv6_addrs *key, *mask;
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};
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struct flow_match_ip {
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struct flow_dissector_key_ip *key, *mask;
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};
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struct flow_match_ports {
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struct flow_dissector_key_ports *key, *mask;
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};
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struct flow_match_icmp {
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struct flow_dissector_key_icmp *key, *mask;
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};
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struct flow_match_tcp {
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struct flow_dissector_key_tcp *key, *mask;
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};
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struct flow_match_mpls {
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struct flow_dissector_key_mpls *key, *mask;
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};
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struct flow_match_enc_keyid {
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struct flow_dissector_key_keyid *key, *mask;
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};
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struct flow_match_enc_opts {
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struct flow_dissector_key_enc_opts *key, *mask;
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};
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struct flow_match_ct {
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struct flow_dissector_key_ct *key, *mask;
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};
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struct flow_rule;
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void flow_rule_match_meta(const struct flow_rule *rule,
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struct flow_match_meta *out);
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void flow_rule_match_basic(const struct flow_rule *rule,
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struct flow_match_basic *out);
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void flow_rule_match_control(const struct flow_rule *rule,
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struct flow_match_control *out);
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void flow_rule_match_eth_addrs(const struct flow_rule *rule,
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struct flow_match_eth_addrs *out);
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void flow_rule_match_vlan(const struct flow_rule *rule,
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struct flow_match_vlan *out);
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void flow_rule_match_cvlan(const struct flow_rule *rule,
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struct flow_match_vlan *out);
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void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
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struct flow_match_ipv4_addrs *out);
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void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
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struct flow_match_ipv6_addrs *out);
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void flow_rule_match_ip(const struct flow_rule *rule,
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struct flow_match_ip *out);
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void flow_rule_match_ports(const struct flow_rule *rule,
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struct flow_match_ports *out);
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void flow_rule_match_tcp(const struct flow_rule *rule,
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struct flow_match_tcp *out);
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void flow_rule_match_icmp(const struct flow_rule *rule,
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struct flow_match_icmp *out);
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void flow_rule_match_mpls(const struct flow_rule *rule,
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struct flow_match_mpls *out);
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void flow_rule_match_enc_control(const struct flow_rule *rule,
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struct flow_match_control *out);
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void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
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struct flow_match_ipv4_addrs *out);
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void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
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struct flow_match_ipv6_addrs *out);
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void flow_rule_match_enc_ip(const struct flow_rule *rule,
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struct flow_match_ip *out);
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void flow_rule_match_enc_ports(const struct flow_rule *rule,
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struct flow_match_ports *out);
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void flow_rule_match_enc_keyid(const struct flow_rule *rule,
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struct flow_match_enc_keyid *out);
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void flow_rule_match_enc_opts(const struct flow_rule *rule,
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struct flow_match_enc_opts *out);
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void flow_rule_match_ct(const struct flow_rule *rule,
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struct flow_match_ct *out);
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enum flow_action_id {
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FLOW_ACTION_ACCEPT = 0,
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FLOW_ACTION_DROP,
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FLOW_ACTION_TRAP,
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FLOW_ACTION_GOTO,
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FLOW_ACTION_REDIRECT,
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FLOW_ACTION_MIRRED,
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FLOW_ACTION_REDIRECT_INGRESS,
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FLOW_ACTION_MIRRED_INGRESS,
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FLOW_ACTION_VLAN_PUSH,
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FLOW_ACTION_VLAN_POP,
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FLOW_ACTION_VLAN_MANGLE,
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FLOW_ACTION_TUNNEL_ENCAP,
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FLOW_ACTION_TUNNEL_DECAP,
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FLOW_ACTION_MANGLE,
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FLOW_ACTION_ADD,
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FLOW_ACTION_CSUM,
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FLOW_ACTION_MARK,
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FLOW_ACTION_PTYPE,
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FLOW_ACTION_PRIORITY,
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FLOW_ACTION_WAKE,
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FLOW_ACTION_QUEUE,
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FLOW_ACTION_SAMPLE,
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FLOW_ACTION_POLICE,
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FLOW_ACTION_CT,
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FLOW_ACTION_CT_METADATA,
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FLOW_ACTION_MPLS_PUSH,
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FLOW_ACTION_MPLS_POP,
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FLOW_ACTION_MPLS_MANGLE,
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FLOW_ACTION_GATE,
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FLOW_ACTION_PPPOE_PUSH,
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FLOW_ACTION_JUMP,
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FLOW_ACTION_PIPE,
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FLOW_ACTION_VLAN_PUSH_ETH,
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FLOW_ACTION_VLAN_POP_ETH,
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NUM_FLOW_ACTIONS,
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};
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/* This is mirroring enum pedit_header_type definition for easy mapping between
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* tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
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* FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
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*/
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enum flow_action_mangle_base {
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FLOW_ACT_MANGLE_UNSPEC = 0,
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FLOW_ACT_MANGLE_HDR_TYPE_ETH,
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FLOW_ACT_MANGLE_HDR_TYPE_IP4,
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FLOW_ACT_MANGLE_HDR_TYPE_IP6,
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FLOW_ACT_MANGLE_HDR_TYPE_TCP,
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FLOW_ACT_MANGLE_HDR_TYPE_UDP,
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};
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enum flow_action_hw_stats_bit {
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FLOW_ACTION_HW_STATS_IMMEDIATE_BIT,
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FLOW_ACTION_HW_STATS_DELAYED_BIT,
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FLOW_ACTION_HW_STATS_DISABLED_BIT,
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FLOW_ACTION_HW_STATS_NUM_BITS
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};
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enum flow_action_hw_stats {
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FLOW_ACTION_HW_STATS_IMMEDIATE =
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BIT(FLOW_ACTION_HW_STATS_IMMEDIATE_BIT),
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FLOW_ACTION_HW_STATS_DELAYED = BIT(FLOW_ACTION_HW_STATS_DELAYED_BIT),
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FLOW_ACTION_HW_STATS_ANY = FLOW_ACTION_HW_STATS_IMMEDIATE |
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FLOW_ACTION_HW_STATS_DELAYED,
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FLOW_ACTION_HW_STATS_DISABLED =
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BIT(FLOW_ACTION_HW_STATS_DISABLED_BIT),
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FLOW_ACTION_HW_STATS_DONT_CARE = BIT(FLOW_ACTION_HW_STATS_NUM_BITS) - 1,
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};
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typedef void (*action_destr)(void *priv);
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struct flow_action_cookie {
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u32 cookie_len;
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u8 cookie[];
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};
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struct flow_action_cookie *flow_action_cookie_create(void *data,
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unsigned int len,
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gfp_t gfp);
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void flow_action_cookie_destroy(struct flow_action_cookie *cookie);
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struct flow_action_entry {
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enum flow_action_id id;
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u32 hw_index;
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enum flow_action_hw_stats hw_stats;
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action_destr destructor;
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void *destructor_priv;
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union {
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u32 chain_index; /* FLOW_ACTION_GOTO */
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struct net_device *dev; /* FLOW_ACTION_REDIRECT */
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struct { /* FLOW_ACTION_VLAN */
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u16 vid;
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__be16 proto;
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u8 prio;
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} vlan;
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struct { /* FLOW_ACTION_VLAN_PUSH_ETH */
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unsigned char dst[ETH_ALEN];
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unsigned char src[ETH_ALEN];
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} vlan_push_eth;
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struct { /* FLOW_ACTION_MANGLE */
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/* FLOW_ACTION_ADD */
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enum flow_action_mangle_base htype;
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u32 offset;
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u32 mask;
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u32 val;
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} mangle;
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struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
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u32 csum_flags; /* FLOW_ACTION_CSUM */
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u32 mark; /* FLOW_ACTION_MARK */
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u16 ptype; /* FLOW_ACTION_PTYPE */
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u32 priority; /* FLOW_ACTION_PRIORITY */
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struct { /* FLOW_ACTION_QUEUE */
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u32 ctx;
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u32 index;
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u8 vf;
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} queue;
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struct { /* FLOW_ACTION_SAMPLE */
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struct psample_group *psample_group;
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u32 rate;
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u32 trunc_size;
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bool truncate;
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} sample;
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struct { /* FLOW_ACTION_POLICE */
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u32 burst;
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u64 rate_bytes_ps;
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u64 peakrate_bytes_ps;
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u32 avrate;
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u16 overhead;
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u64 burst_pkt;
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u64 rate_pkt_ps;
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u32 mtu;
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struct {
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enum flow_action_id act_id;
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u32 extval;
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} exceed, notexceed;
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} police;
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struct { /* FLOW_ACTION_CT */
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int action;
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u16 zone;
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struct nf_flowtable *flow_table;
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} ct;
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struct {
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unsigned long cookie;
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u32 mark;
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u32 labels[4];
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bool orig_dir;
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} ct_metadata;
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struct { /* FLOW_ACTION_MPLS_PUSH */
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u32 label;
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__be16 proto;
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u8 tc;
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u8 bos;
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u8 ttl;
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} mpls_push;
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struct { /* FLOW_ACTION_MPLS_POP */
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__be16 proto;
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} mpls_pop;
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struct { /* FLOW_ACTION_MPLS_MANGLE */
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u32 label;
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u8 tc;
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u8 bos;
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u8 ttl;
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} mpls_mangle;
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struct {
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s32 prio;
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u64 basetime;
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u64 cycletime;
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u64 cycletimeext;
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u32 num_entries;
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struct action_gate_entry *entries;
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} gate;
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struct { /* FLOW_ACTION_PPPOE_PUSH */
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u16 sid;
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} pppoe;
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};
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struct flow_action_cookie *cookie; /* user defined action cookie */
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};
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struct flow_action {
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unsigned int num_entries;
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struct flow_action_entry entries[];
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};
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static inline bool flow_action_has_entries(const struct flow_action *action)
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{
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return action->num_entries;
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}
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/**
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* flow_offload_has_one_action() - check if exactly one action is present
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* @action: tc filter flow offload action
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*
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* Returns true if exactly one action is present.
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*/
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static inline bool flow_offload_has_one_action(const struct flow_action *action)
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{
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return action->num_entries == 1;
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}
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static inline bool flow_action_is_last_entry(const struct flow_action *action,
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const struct flow_action_entry *entry)
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{
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return entry == &action->entries[action->num_entries - 1];
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}
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#define flow_action_for_each(__i, __act, __actions) \
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for (__i = 0, __act = &(__actions)->entries[0]; \
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__i < (__actions)->num_entries; \
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__act = &(__actions)->entries[++__i])
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static inline bool
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flow_action_mixed_hw_stats_check(const struct flow_action *action,
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struct netlink_ext_ack *extack)
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{
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const struct flow_action_entry *action_entry;
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u8 last_hw_stats;
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int i;
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if (flow_offload_has_one_action(action))
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return true;
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flow_action_for_each(i, action_entry, action) {
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if (i && action_entry->hw_stats != last_hw_stats) {
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NL_SET_ERR_MSG_MOD(extack, "Mixing HW stats types for actions is not supported");
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return false;
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}
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last_hw_stats = action_entry->hw_stats;
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}
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return true;
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}
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static inline const struct flow_action_entry *
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flow_action_first_entry_get(const struct flow_action *action)
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{
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WARN_ON(!flow_action_has_entries(action));
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return &action->entries[0];
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}
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static inline bool
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__flow_action_hw_stats_check(const struct flow_action *action,
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struct netlink_ext_ack *extack,
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bool check_allow_bit,
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enum flow_action_hw_stats_bit allow_bit)
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{
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const struct flow_action_entry *action_entry;
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if (!flow_action_has_entries(action))
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return true;
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if (!flow_action_mixed_hw_stats_check(action, extack))
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return false;
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action_entry = flow_action_first_entry_get(action);
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/* Zero is not a legal value for hw_stats, catch anyone passing it */
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WARN_ON_ONCE(!action_entry->hw_stats);
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if (!check_allow_bit &&
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~action_entry->hw_stats & FLOW_ACTION_HW_STATS_ANY) {
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NL_SET_ERR_MSG_MOD(extack, "Driver supports only default HW stats type \"any\"");
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return false;
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} else if (check_allow_bit &&
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!(action_entry->hw_stats & BIT(allow_bit))) {
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NL_SET_ERR_MSG_MOD(extack, "Driver does not support selected HW stats type");
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return false;
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}
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return true;
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}
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static inline bool
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flow_action_hw_stats_check(const struct flow_action *action,
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struct netlink_ext_ack *extack,
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enum flow_action_hw_stats_bit allow_bit)
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{
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return __flow_action_hw_stats_check(action, extack, true, allow_bit);
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}
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static inline bool
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flow_action_basic_hw_stats_check(const struct flow_action *action,
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struct netlink_ext_ack *extack)
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{
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return __flow_action_hw_stats_check(action, extack, false, 0);
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}
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struct flow_rule {
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struct flow_match match;
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struct flow_action action;
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};
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struct flow_rule *flow_rule_alloc(unsigned int num_actions);
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static inline bool flow_rule_match_key(const struct flow_rule *rule,
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enum flow_dissector_key_id key)
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{
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return dissector_uses_key(rule->match.dissector, key);
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}
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struct flow_stats {
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u64 pkts;
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u64 bytes;
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u64 drops;
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u64 lastused;
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enum flow_action_hw_stats used_hw_stats;
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bool used_hw_stats_valid;
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};
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static inline void flow_stats_update(struct flow_stats *flow_stats,
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u64 bytes, u64 pkts,
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u64 drops, u64 lastused,
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enum flow_action_hw_stats used_hw_stats)
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{
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flow_stats->pkts += pkts;
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flow_stats->bytes += bytes;
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flow_stats->drops += drops;
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flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused);
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/* The driver should pass value with a maximum of one bit set.
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* Passing FLOW_ACTION_HW_STATS_ANY is invalid.
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*/
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WARN_ON(used_hw_stats == FLOW_ACTION_HW_STATS_ANY);
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flow_stats->used_hw_stats |= used_hw_stats;
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flow_stats->used_hw_stats_valid = true;
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}
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enum flow_block_command {
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FLOW_BLOCK_BIND,
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FLOW_BLOCK_UNBIND,
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};
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enum flow_block_binder_type {
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FLOW_BLOCK_BINDER_TYPE_UNSPEC,
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FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
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FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
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FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
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FLOW_BLOCK_BINDER_TYPE_RED_MARK,
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};
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struct flow_block {
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struct list_head cb_list;
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};
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struct netlink_ext_ack;
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struct flow_block_offload {
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enum flow_block_command command;
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enum flow_block_binder_type binder_type;
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bool block_shared;
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bool unlocked_driver_cb;
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struct net *net;
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struct flow_block *block;
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struct list_head cb_list;
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struct list_head *driver_block_list;
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struct netlink_ext_ack *extack;
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struct Qdisc *sch;
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struct list_head *cb_list_head;
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};
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enum tc_setup_type;
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typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
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void *cb_priv);
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struct flow_block_cb;
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struct flow_block_indr {
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struct list_head list;
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struct net_device *dev;
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struct Qdisc *sch;
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enum flow_block_binder_type binder_type;
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void *data;
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void *cb_priv;
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void (*cleanup)(struct flow_block_cb *block_cb);
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};
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struct flow_block_cb {
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struct list_head driver_list;
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struct list_head list;
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flow_setup_cb_t *cb;
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void *cb_ident;
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void *cb_priv;
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void (*release)(void *cb_priv);
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struct flow_block_indr indr;
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unsigned int refcnt;
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};
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struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
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void *cb_ident, void *cb_priv,
|
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void (*release)(void *cb_priv));
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struct flow_block_cb *flow_indr_block_cb_alloc(flow_setup_cb_t *cb,
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|
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);
|
|
|
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struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
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|
flow_setup_cb_t *cb, void *cb_ident);
|
|
|
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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;
|
|
};
|
|
|
|
enum offload_act_command {
|
|
FLOW_ACT_REPLACE,
|
|
FLOW_ACT_DESTROY,
|
|
FLOW_ACT_STATS,
|
|
};
|
|
|
|
struct flow_offload_action {
|
|
struct netlink_ext_ack *extack; /* NULL in FLOW_ACT_STATS process*/
|
|
enum offload_act_command command;
|
|
enum flow_action_id id;
|
|
u32 index;
|
|
struct flow_stats stats;
|
|
struct flow_action action;
|
|
};
|
|
|
|
struct flow_offload_action *offload_action_alloc(unsigned int num_actions);
|
|
|
|
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 */
|