include/net/flow_offload.h

   1 #ifndef _NET_FLOW_OFFLOAD_H
   2 #define _NET_FLOW_OFFLOAD_H
   3
   4 #include <net/flow_dissector.h>
   5
   6 struct flow_match {
   7         struct flow_dissector   *dissector;
   8         void                    *mask;
   9         void                    *key;
  10 };
  11
  12 struct flow_match_basic {
  13         struct flow_dissector_key_basic *key, *mask;
  14 };
  15
  16 struct flow_match_control {
  17         struct flow_dissector_key_control *key, *mask;
  18 };
  19
  20 struct flow_match_eth_addrs {
  21         struct flow_dissector_key_eth_addrs *key, *mask;
  22 };
  23
  24 struct flow_match_vlan {
  25         struct flow_dissector_key_vlan *key, *mask;
  26 };
  27
  28 struct flow_match_ipv4_addrs {
  29         struct flow_dissector_key_ipv4_addrs *key, *mask;
  30 };
  31
  32 struct flow_match_ipv6_addrs {
  33         struct flow_dissector_key_ipv6_addrs *key, *mask;
  34 };
  35
  36 struct flow_match_ip {
  37         struct flow_dissector_key_ip *key, *mask;
  38 };
  39
  40 struct flow_match_ports {
  41         struct flow_dissector_key_ports *key, *mask;
  42 };
  43
  44 struct flow_match_icmp {
  45         struct flow_dissector_key_icmp *key, *mask;
  46 };
  47
  48 struct flow_match_tcp {
  49         struct flow_dissector_key_tcp *key, *mask;
  50 };
  51
  52 struct flow_match_mpls {
  53         struct flow_dissector_key_mpls *key, *mask;
  54 };
  55
  56 struct flow_match_enc_keyid {
  57         struct flow_dissector_key_keyid *key, *mask;
  58 };
  59
  60 struct flow_match_enc_opts {
  61         struct flow_dissector_key_enc_opts *key, *mask;
  62 };
  63
  64 struct flow_rule;
  65
  66 void flow_rule_match_basic(const struct flow_rule *rule,
  67                            struct flow_match_basic *out);
  68 void flow_rule_match_control(const struct flow_rule *rule,
  69                              struct flow_match_control *out);
  70 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
  71                                struct flow_match_eth_addrs *out);
  72 void flow_rule_match_vlan(const struct flow_rule *rule,
  73                           struct flow_match_vlan *out);
  74 void flow_rule_match_cvlan(const struct flow_rule *rule,
  75                            struct flow_match_vlan *out);
  76 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
  77                                 struct flow_match_ipv4_addrs *out);
  78 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
  79                                 struct flow_match_ipv6_addrs *out);
  80 void flow_rule_match_ip(const struct flow_rule *rule,
  81                         struct flow_match_ip *out);
  82 void flow_rule_match_ports(const struct flow_rule *rule,
  83                            struct flow_match_ports *out);
  84 void flow_rule_match_tcp(const struct flow_rule *rule,
  85                          struct flow_match_tcp *out);
  86 void flow_rule_match_icmp(const struct flow_rule *rule,
  87                           struct flow_match_icmp *out);
  88 void flow_rule_match_mpls(const struct flow_rule *rule,
  89                           struct flow_match_mpls *out);
  90 void flow_rule_match_enc_control(const struct flow_rule *rule,
  91                                  struct flow_match_control *out);
  92 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
  93                                     struct flow_match_ipv4_addrs *out);
  94 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
  95                                     struct flow_match_ipv6_addrs *out);
  96 void flow_rule_match_enc_ip(const struct flow_rule *rule,
  97                             struct flow_match_ip *out);
  98 void flow_rule_match_enc_ports(const struct flow_rule *rule,
  99                                struct flow_match_ports *out);
 100 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
 101                                struct flow_match_enc_keyid *out);
 102 void flow_rule_match_enc_opts(const struct flow_rule *rule,
 103                               struct flow_match_enc_opts *out);
 104
 105 enum flow_action_id {
 106         FLOW_ACTION_ACCEPT              = 0,
 107         FLOW_ACTION_DROP,
 108         FLOW_ACTION_TRAP,
 109         FLOW_ACTION_GOTO,
 110         FLOW_ACTION_REDIRECT,
 111         FLOW_ACTION_MIRRED,
 112         FLOW_ACTION_VLAN_PUSH,
 113         FLOW_ACTION_VLAN_POP,
 114         FLOW_ACTION_VLAN_MANGLE,
 115         FLOW_ACTION_TUNNEL_ENCAP,
 116         FLOW_ACTION_TUNNEL_DECAP,
 117         FLOW_ACTION_MANGLE,
 118         FLOW_ACTION_ADD,
 119         FLOW_ACTION_CSUM,
 120         FLOW_ACTION_MARK,
 121         FLOW_ACTION_WAKE,
 122         FLOW_ACTION_QUEUE,
 123         FLOW_ACTION_SAMPLE,
 124         FLOW_ACTION_POLICE,
 125 };
 126
 127 /* This is mirroring enum pedit_header_type definition for easy mapping between
 128  * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
 129  * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
 130  */
 131 enum flow_action_mangle_base {
 132         FLOW_ACT_MANGLE_UNSPEC          = 0,
 133         FLOW_ACT_MANGLE_HDR_TYPE_ETH,
 134         FLOW_ACT_MANGLE_HDR_TYPE_IP4,
 135         FLOW_ACT_MANGLE_HDR_TYPE_IP6,
 136         FLOW_ACT_MANGLE_HDR_TYPE_TCP,
 137         FLOW_ACT_MANGLE_HDR_TYPE_UDP,
 138 };
 139
 140 struct flow_action_entry {
 141         enum flow_action_id             id;
 142         union {
 143                 u32                     chain_index;    /* FLOW_ACTION_GOTO */
 144                 struct net_device       *dev;           /* FLOW_ACTION_REDIRECT */
 145                 struct {                                /* FLOW_ACTION_VLAN */
 146                         u16             vid;
 147                         __be16          proto;
 148                         u8              prio;
 149                 } vlan;
 150                 struct {                                /* FLOW_ACTION_PACKET_EDIT */
 151                         enum flow_action_mangle_base htype;
 152                         u32             offset;
 153                         u32             mask;
 154                         u32             val;
 155                 } mangle;
 156                 const struct ip_tunnel_info *tunnel;    /* FLOW_ACTION_TUNNEL_ENCAP */
 157                 u32                     csum_flags;     /* FLOW_ACTION_CSUM */
 158                 u32                     mark;           /* FLOW_ACTION_MARK */
 159                 struct {                                /* FLOW_ACTION_QUEUE */
 160                         u32             ctx;
 161                         u32             index;
 162                         u8              vf;
 163                 } queue;
 164                 struct {                                /* FLOW_ACTION_SAMPLE */
 165                         struct psample_group    *psample_group;
 166                         u32                     rate;
 167                         u32                     trunc_size;
 168                         bool                    truncate;
 169                 } sample;
 170                 struct {                                /* FLOW_ACTION_POLICE */
 171                         s64                     burst;
 172                         u64                     rate_bytes_ps;
 173                 } police;
 174         };
 175 };
 176
 177 struct flow_action {
 178         unsigned int                    num_entries;
 179         struct flow_action_entry        entries[0];
 180 };
 181
 182 static inline bool flow_action_has_entries(const struct flow_action *action)
 183 {
 184         return action->num_entries;
 185 }
 186
 187 /**
 188  * flow_action_has_one_action() - check if exactly one action is present
 189  * @action: tc filter flow offload action
 190  *
 191  * Returns true if exactly one action is present.
 192  */
 193 static inline bool flow_offload_has_one_action(const struct flow_action *action)
 194 {
 195         return action->num_entries == 1;
 196 }
 197
 198 #define flow_action_for_each(__i, __act, __actions)                     \
 199         for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i])
 200
 201 struct flow_rule {
 202         struct flow_match       match;
 203         struct flow_action      action;
 204 };
 205
 206 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
 207
 208 static inline bool flow_rule_match_key(const struct flow_rule *rule,
 209                                        enum flow_dissector_key_id key)
 210 {
 211         return dissector_uses_key(rule->match.dissector, key);
 212 }
 213
 214 struct flow_stats {
 215         u64     pkts;
 216         u64     bytes;
 217         u64     lastused;
 218 };
 219
 220 static inline void flow_stats_update(struct flow_stats *flow_stats,
 221                                      u64 bytes, u64 pkts, u64 lastused)
 222 {
 223         flow_stats->pkts        += pkts;
 224         flow_stats->bytes       += bytes;
 225         flow_stats->lastused    = max_t(u64, flow_stats->lastused, lastused);
 226 }
 227
 228 #endif /* _NET_FLOW_OFFLOAD_H */