1 /* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
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:
7 * http://www.apache.org/licenses/LICENSE-2.0
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. */
15 #ifndef OFPROTO_DPIF_H
16 #define OFPROTO_DPIF_H 1
20 #include "fail-open.h"
24 #include "ovs-thread.h"
25 #include "ofproto-provider.h"
28 #include "ovs-thread.h"
30 /* Priority for internal rules created to handle recirculation */
31 #define RECIRC_RULE_PRIORITY 20
33 union user_action_cookie;
34 struct dpif_flow_stats;
37 struct ofproto_packet_in;
40 struct OVS_LOCKABLE rule_dpif;
41 struct OVS_LOCKABLE group_dpif;
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);
48 /* Ofproto-dpif -- DPIF based ofproto implementation.
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.
56 * Ofproto-dpif is divided into three major chunks.
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.
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.
72 * - ofproto-dpif-xlate.c
73 * Ofproto-dpif-xlate is responsible for translating OpenFlow actions into
74 * datapath actions. */
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;
83 /* Maximum number of MPLS label stack entries that the datapath supports
85 size_t max_mpls_depth;
87 /* True if the datapath supports masked data in OVS_ACTION_ATTR_SET
89 bool masked_set_action;
91 /* True if the datapath supports recirculation. */
94 /* True if the datapath supports tnl_push and pop actions. */
97 /* True if the datapath supports OVS_FLOW_ATTR_UFID. */
101 size_t ofproto_dpif_get_max_mpls_depth(const struct ofproto_dpif *);
102 bool ofproto_dpif_get_enable_recirc(const struct ofproto_dpif *);
103 bool ofproto_dpif_get_enable_ufid(struct dpif_backer *backer);
105 struct rule_dpif *rule_dpif_lookup_from_table(struct ofproto_dpif *,
107 struct flow_wildcards *,
109 const struct dpif_flow_stats *,
113 bool honor_table_miss);
115 static inline void rule_dpif_ref(struct rule_dpif *);
116 static inline void rule_dpif_unref(struct rule_dpif *);
118 void rule_dpif_credit_stats(struct rule_dpif *rule ,
119 const struct dpif_flow_stats *);
121 static inline bool rule_dpif_is_fail_open(const struct rule_dpif *);
122 static inline bool rule_dpif_is_table_miss(const struct rule_dpif *);
123 static inline bool rule_dpif_is_internal(const struct rule_dpif *);
125 uint8_t rule_dpif_get_table(const struct rule_dpif *);
127 bool table_is_internal(uint8_t table_id);
129 const struct rule_actions *rule_dpif_get_actions(const struct rule_dpif *);
130 void rule_set_recirc_id(struct rule *, uint32_t id);
132 ovs_be64 rule_dpif_get_flow_cookie(const struct rule_dpif *rule);
134 void rule_dpif_reduce_timeouts(struct rule_dpif *rule, uint16_t idle_timeout,
135 uint16_t hard_timeout);
137 void choose_miss_rule(enum ofputil_port_config,
138 struct rule_dpif *miss_rule,
139 struct rule_dpif *no_packet_in_rule,
140 struct rule_dpif **rule, bool take_ref);
142 void group_dpif_credit_stats(struct group_dpif *,
143 struct ofputil_bucket *,
144 const struct dpif_flow_stats *);
145 bool group_dpif_lookup(struct ofproto_dpif *ofproto, uint32_t group_id,
146 struct group_dpif **group);
148 void group_dpif_get_buckets(const struct group_dpif *group,
149 const struct ovs_list **buckets);
150 enum ofp11_group_type group_dpif_get_type(const struct group_dpif *group);
151 const char *group_dpif_get_selection_method(const struct group_dpif *group);
152 uint64_t group_dpif_get_selection_method_param(const struct group_dpif *group);
153 const struct field_array *group_dpif_get_fields(const struct group_dpif *group);
155 bool ofproto_has_vlan_splinters(const struct ofproto_dpif *);
156 ofp_port_t vsp_realdev_to_vlandev(const struct ofproto_dpif *,
157 ofp_port_t realdev_ofp_port,
159 bool vsp_adjust_flow(const struct ofproto_dpif *, struct flow *,
160 struct dp_packet *packet);
162 int ofproto_dpif_execute_actions(struct ofproto_dpif *, const struct flow *,
163 struct rule_dpif *, const struct ofpact *,
164 size_t ofpacts_len, struct dp_packet *);
165 void ofproto_dpif_send_packet_in(struct ofproto_dpif *,
166 struct ofproto_packet_in *);
167 bool ofproto_dpif_wants_packet_in_on_miss(struct ofproto_dpif *);
168 int ofproto_dpif_send_packet(const struct ofport_dpif *, struct dp_packet *);
169 void ofproto_dpif_flow_mod(struct ofproto_dpif *, struct ofputil_flow_mod *);
170 struct rule_dpif *ofproto_dpif_refresh_rule(struct rule_dpif *);
172 struct ofport_dpif *odp_port_to_ofport(const struct dpif_backer *, odp_port_t);
173 struct ofport_dpif *ofp_port_to_ofport(const struct ofproto_dpif *,
176 int ofproto_dpif_add_internal_flow(struct ofproto_dpif *,
177 const struct match *, int priority,
178 uint16_t idle_timeout,
179 const struct ofpbuf *ofpacts,
180 struct rule **rulep);
181 int ofproto_dpif_delete_internal_flow(struct ofproto_dpif *, struct match *,
184 /* struct rule_dpif has struct rule as it's first member. */
185 #define RULE_CAST(RULE) ((struct rule *)RULE)
186 #define GROUP_CAST(GROUP) ((struct ofgroup *)GROUP)
188 static inline struct group_dpif* group_dpif_ref(struct group_dpif *group)
191 ofproto_group_ref(GROUP_CAST(group));
196 static inline void group_dpif_unref(struct group_dpif *group)
199 ofproto_group_unref(GROUP_CAST(group));
203 static inline void rule_dpif_ref(struct rule_dpif *rule)
206 ofproto_rule_ref(RULE_CAST(rule));
210 static inline bool rule_dpif_try_ref(struct rule_dpif *rule)
213 return ofproto_rule_try_ref(RULE_CAST(rule));
219 static inline void rule_dpif_unref(struct rule_dpif *rule)
222 ofproto_rule_unref(RULE_CAST(rule));
226 static inline bool rule_dpif_is_fail_open(const struct rule_dpif *rule)
228 return is_fail_open_rule(RULE_CAST(rule));
231 static inline bool rule_dpif_is_table_miss(const struct rule_dpif *rule)
233 return rule_is_table_miss(RULE_CAST(rule));
236 /* Returns true if 'rule' is an internal rule, false otherwise. */
237 static inline bool rule_dpif_is_internal(const struct rule_dpif *rule)
239 return RULE_CAST(rule)->table_id == TBL_INTERNAL;
244 bool ovs_native_tunneling_is_on(struct ofproto_dpif *ofproto);
245 #endif /* ofproto-dpif.h */