![Pablo Neira Ayuso](/assets/img/avatar_default.png)
This patch adds the list handling functions for the flow block API: * flow_block_cb_lookup() allows drivers to look up for existing flow blocks. * flow_block_cb_add() adds a flow block to the per driver list to be registered by the core. * flow_block_cb_remove() to remove a flow block from the list of existing flow blocks per driver and to request the core to unregister this. The flow block API also annotates the netns this flow block belongs to. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
301 lines
7.9 KiB
C
301 lines
7.9 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 <net/flow_dissector.h>
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#include <net/sch_generic.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_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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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_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_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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};
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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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struct flow_action_entry {
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enum flow_action_id id;
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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_PACKET_EDIT */
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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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const 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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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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s64 burst;
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u64 rate_bytes_ps;
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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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} ct;
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};
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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[0];
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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_action_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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#define flow_action_for_each(__i, __act, __actions) \
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for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i])
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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 lastused;
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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, u64 lastused)
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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->lastused = max_t(u64, flow_stats->lastused, lastused);
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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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};
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struct tcf_block;
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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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struct tcf_block *block;
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struct net *net;
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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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};
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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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struct net *net;
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tc_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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unsigned int refcnt;
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};
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struct flow_block_cb *flow_block_cb_alloc(struct net *net, tc_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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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_offload *offload,
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tc_setup_cb_t *cb, void *cb_ident);
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static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
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struct flow_block_offload *offload)
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{
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list_add_tail(&block_cb->list, &offload->cb_list);
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}
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static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
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struct flow_block_offload *offload)
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{
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list_move(&block_cb->list, &offload->cb_list);
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}
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int flow_block_cb_setup_simple(struct flow_block_offload *f,
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struct list_head *driver_list, tc_setup_cb_t *cb,
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void *cb_ident, void *cb_priv, bool ingress_only);
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#endif /* _NET_FLOW_OFFLOAD_H */
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