ofproto/ofproto-dpif.h

   1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License. */
  14
  15 #ifndef OFPROTO_DPIF_H
  16 #define OFPROTO_DPIF_H 1
  17
  18 #include <stdint.h>
  19
  20 #include "fail-open.h"
  21 #include "hmapx.h"
  22 #include "odp-util.h"
  23 #include "openvswitch/ofp-util.h"
  24 #include "ovs-thread.h"
  25 #include "ofproto-provider.h"
  26 #include "timer.h"
  27 #include "util.h"
  28 #include "ovs-thread.h"
  29
  30 /* Priority for internal rules created to handle recirculation */
  31 #define RECIRC_RULE_PRIORITY 20
  32
  33 union user_action_cookie;
  34 struct dpif_flow_stats;
  35 struct ofproto;
  36 struct ofproto_async_msg;
  37 struct ofproto_dpif;
  38 struct ofport_dpif;
  39 struct dpif_backer;
  40 struct OVS_LOCKABLE rule_dpif;
  41 struct OVS_LOCKABLE group_dpif;
  42
  43 /* Number of implemented OpenFlow tables. */
  44 enum { N_TABLES = 255 };
  45 enum { TBL_INTERNAL = N_TABLES - 1 };    /* Used for internal hidden rules. */
  46 BUILD_ASSERT_DECL(N_TABLES >= 2 && N_TABLES <= 255);
  47
  48 /* Ofproto-dpif -- DPIF based ofproto implementation.
  49  *
  50  * Ofproto-dpif provides an ofproto implementation for those platforms which
  51  * implement the netdev and dpif interface defined in netdev.h and dpif.h.  The
  52  * most important of which is the Linux Kernel Module (dpif-linux), but
  53  * alternatives are supported such as a userspace only implementation
  54  * (dpif-netdev), and a dummy implementation used for unit testing.
  55  *
  56  * Ofproto-dpif is divided into three major chunks.
  57  *
  58  * - ofproto-dpif.c
  59  *   The main ofproto-dpif module is responsible for implementing the
  60  *   provider interface, installing and removing datapath flows, maintaining
  61  *   packet statistics, running protocols (BFD, LACP, STP, etc), and
  62  *   configuring relevant submodules.
  63  *
  64  * - ofproto-dpif-upcall.c
  65  *   Ofproto-dpif-upcall is responsible for retrieving upcalls from the kernel,
  66  *   processing miss upcalls, and handing more complex ones up to the main
  67  *   ofproto-dpif module.  Miss upcall processing boils down to figuring out
  68  *   what each packet's actions are, executing them (i.e. asking the kernel to
  69  *   forward it), and handing it up to ofproto-dpif to decided whether or not
  70  *   to install a kernel flow.
  71  *
  72  * - ofproto-dpif-xlate.c
  73  *   Ofproto-dpif-xlate is responsible for translating OpenFlow actions into
  74  *   datapath actions. */
  75
  76 /* Stores the various features which the corresponding backer supports. */
  77 struct dpif_backer_support {
  78     /* True if the datapath supports variable-length
  79      * OVS_USERSPACE_ATTR_USERDATA in OVS_ACTION_ATTR_USERSPACE actions.
  80      * False if the datapath supports only 8-byte (or shorter) userdata. */
  81     bool variable_length_userdata;
  82
  83     /* True if the datapath supports masked data in OVS_ACTION_ATTR_SET
  84      * actions. */
  85     bool masked_set_action;
  86
  87     /* True if the datapath supports tnl_push and pop actions. */
  88     bool tnl_push_pop;
  89
  90     /* True if the datapath supports OVS_FLOW_ATTR_UFID. */
  91     bool ufid;
  92
  93     /* Each member represents support for related OVS_KEY_ATTR_* fields. */
  94     struct odp_support odp;
  95 };
  96
  97 bool ofproto_dpif_get_enable_ufid(const struct dpif_backer *backer);
  98 struct dpif_backer_support *ofproto_dpif_get_support(const struct ofproto_dpif *);
  99
 100 cls_version_t ofproto_dpif_get_tables_version(struct ofproto_dpif *);
 101
 102 struct rule_dpif *rule_dpif_lookup_from_table(struct ofproto_dpif *,
 103                                               cls_version_t, struct flow *,
 104                                               struct flow_wildcards *,
 105                                               const struct dpif_flow_stats *,
 106                                               uint8_t *table_id,
 107                                               ofp_port_t in_port,
 108                                               bool may_packet_in,
 109                                               bool honor_table_miss);
 110
 111 static inline void rule_dpif_ref(struct rule_dpif *);
 112 static inline void rule_dpif_unref(struct rule_dpif *);
 113
 114 void rule_dpif_credit_stats(struct rule_dpif *rule ,
 115                             const struct dpif_flow_stats *);
 116
 117 static inline bool rule_dpif_is_fail_open(const struct rule_dpif *);
 118 static inline bool rule_dpif_is_table_miss(const struct rule_dpif *);
 119 static inline bool rule_dpif_is_internal(const struct rule_dpif *);
 120
 121 uint8_t rule_dpif_get_table(const struct rule_dpif *);
 122
 123 bool table_is_internal(uint8_t table_id);
 124
 125 const struct rule_actions *rule_dpif_get_actions(const struct rule_dpif *);
 126 void rule_set_recirc_id(struct rule *, uint32_t id);
 127
 128 ovs_be64 rule_dpif_get_flow_cookie(const struct rule_dpif *rule);
 129
 130 void rule_dpif_reduce_timeouts(struct rule_dpif *rule, uint16_t idle_timeout,
 131                                uint16_t hard_timeout);
 132
 133 void group_dpif_credit_stats(struct group_dpif *,
 134                              struct ofputil_bucket *,
 135                              const struct dpif_flow_stats *);
 136 bool group_dpif_lookup(struct ofproto_dpif *ofproto, uint32_t group_id,
 137                        struct group_dpif **group);
 138
 139 void group_dpif_get_buckets(const struct group_dpif *group,
 140                             const struct ovs_list **buckets);
 141 enum ofp11_group_type group_dpif_get_type(const struct group_dpif *group);
 142 const char *group_dpif_get_selection_method(const struct group_dpif *group);
 143 uint64_t group_dpif_get_selection_method_param(const struct group_dpif *group);
 144 const struct field_array *group_dpif_get_fields(const struct group_dpif *group);
 145
 146 int ofproto_dpif_execute_actions(struct ofproto_dpif *, const struct flow *,
 147                                  struct rule_dpif *, const struct ofpact *,
 148                                  size_t ofpacts_len, struct dp_packet *);
 149 int ofproto_dpif_execute_actions__(struct ofproto_dpif *, const struct flow *,
 150                                    struct rule_dpif *, const struct ofpact *,
 151                                    size_t ofpacts_len, int indentation,
 152                                    int resubmits, struct dp_packet *);
 153 void ofproto_dpif_send_async_msg(struct ofproto_dpif *,
 154                                  struct ofproto_async_msg *);
 155 bool ofproto_dpif_wants_packet_in_on_miss(struct ofproto_dpif *);
 156 int ofproto_dpif_send_packet(const struct ofport_dpif *, struct dp_packet *);
 157 void ofproto_dpif_flow_mod(struct ofproto_dpif *,
 158                            const struct ofputil_flow_mod *);
 159 struct rule_dpif *ofproto_dpif_refresh_rule(struct rule_dpif *);
 160
 161 struct ofport_dpif *odp_port_to_ofport(const struct dpif_backer *, odp_port_t);
 162 struct ofport_dpif *ofp_port_to_ofport(const struct ofproto_dpif *,
 163                                        ofp_port_t);
 164
 165 bool ofproto_dpif_backer_enabled(struct dpif_backer* backer);
 166
 167 int ofproto_dpif_add_internal_flow(struct ofproto_dpif *,
 168                                    const struct match *, int priority,
 169                                    uint16_t idle_timeout,
 170                                    const struct ofpbuf *ofpacts,
 171                                    struct rule **rulep);
 172 int ofproto_dpif_delete_internal_flow(struct ofproto_dpif *, struct match *,
 173                                       int priority);
 174
 175 const struct uuid *ofproto_dpif_get_uuid(const struct ofproto_dpif *);
 176 \f
 177 /* struct rule_dpif has struct rule as it's first member. */
 178 #define RULE_CAST(RULE) ((struct rule *)RULE)
 179 #define GROUP_CAST(GROUP) ((struct ofgroup *)GROUP)
 180
 181 static inline struct group_dpif* group_dpif_ref(struct group_dpif *group)
 182 {
 183     if (group) {
 184         ofproto_group_ref(GROUP_CAST(group));
 185     }
 186     return group;
 187 }
 188
 189 static inline void group_dpif_unref(struct group_dpif *group)
 190 {
 191     if (group) {
 192         ofproto_group_unref(GROUP_CAST(group));
 193     }
 194 }
 195
 196 static inline void rule_dpif_ref(struct rule_dpif *rule)
 197 {
 198     if (rule) {
 199         ofproto_rule_ref(RULE_CAST(rule));
 200     }
 201 }
 202
 203 static inline void rule_dpif_unref(struct rule_dpif *rule)
 204 {
 205     if (rule) {
 206         ofproto_rule_unref(RULE_CAST(rule));
 207     }
 208 }
 209
 210 static inline bool rule_dpif_is_fail_open(const struct rule_dpif *rule)
 211 {
 212     return is_fail_open_rule(RULE_CAST(rule));
 213 }
 214
 215 static inline bool rule_dpif_is_table_miss(const struct rule_dpif *rule)
 216 {
 217     return rule_is_table_miss(RULE_CAST(rule));
 218 }
 219
 220 /* Returns true if 'rule' is an internal rule, false otherwise. */
 221 static inline bool rule_dpif_is_internal(const struct rule_dpif *rule)
 222 {
 223     return RULE_CAST(rule)->table_id == TBL_INTERNAL;
 224 }
 225
 226 #undef RULE_CAST
 227
 228 bool ovs_native_tunneling_is_on(struct ofproto_dpif *ofproto);
 229 #endif /* ofproto-dpif.h */