mirror of
https://github.com/torvalds/linux
synced 2024-09-22 20:37:18 +00:00
a57066b1a0
The UDP reuseport conflict was a little bit tricky.
The net-next code, via bpf-next, extracted the reuseport handling
into a helper so that the BPF sk lookup code could invoke it.
At the same time, the logic for reuseport handling of unconnected
sockets changed via commit efc6b6f6c3
which changed the logic to carry on the reuseport result into the
rest of the lookup loop if we do not return immediately.
This requires moving the reuseport_has_conns() logic into the callers.
While we are here, get rid of inline directives as they do not belong
in foo.c files.
The other changes were cases of more straightforward overlapping
modifications.
Signed-off-by: David S. Miller <davem@davemloft.net>
572 lines
15 KiB
C
572 lines
15 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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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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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_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 index;
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u32 burst;
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u64 rate_bytes_ps;
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u32 mtu;
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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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} 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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u32 index;
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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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};
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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_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]; \
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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 uninitialized_var(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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};
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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,
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void (*release)(void *cb_priv),
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struct flow_block_offload *bo,
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struct net_device *dev,
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struct Qdisc *sch, void *data,
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void *indr_cb_priv,
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void (*cleanup)(struct flow_block_cb *block_cb));
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void flow_block_cb_free(struct flow_block_cb *block_cb);
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|
|
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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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|
|
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void *flow_block_cb_priv(struct flow_block_cb *block_cb);
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void flow_block_cb_incref(struct flow_block_cb *block_cb);
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unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
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|
|
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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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|
list_add_tail(&block_cb->list, &offload->cb_list);
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|
}
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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)
|
|
{
|
|
list_move(&block_cb->list, &offload->cb_list);
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|
}
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|
|
|
static inline void flow_indr_block_cb_remove(struct flow_block_cb *block_cb,
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|
struct flow_block_offload *offload)
|
|
{
|
|
list_del(&block_cb->indr.list);
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|
list_move(&block_cb->list, &offload->cb_list);
|
|
}
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|
|
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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));
|
|
|
|
#endif /* _NET_FLOW_OFFLOAD_H */
|