/* * Copyright (c) 2009-2017 Nicira, Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef OFPROTO_OFPROTO_PROVIDER_H #define OFPROTO_OFPROTO_PROVIDER_H 1 /* Definitions for use within ofproto. * * * Thread-safety * ============= * * Lots of ofproto data structures are only accessed from a single thread. * Those data structures are generally not thread-safe. * * The ofproto-dpif ofproto implementation accesses the flow table from * multiple threads, including modifying the flow table from multiple threads * via the "learn" action, so the flow table and various structures that index * it have been made thread-safe. Refer to comments on individual data * structures for details. */ #include "cfm.h" #include "classifier.h" #include "guarded-list.h" #include "heap.h" #include "hindex.h" #include "object-collection.h" #include "ofproto/ofproto.h" #include "openvswitch/list.h" #include "openvswitch/ofp-actions.h" #include "openvswitch/ofp-ct.h" #include "openvswitch/ofp-errors.h" #include "openvswitch/ofp-flow.h" #include "openvswitch/ofp-group.h" #include "openvswitch/ofp-meter.h" #include "openvswitch/ofp-port.h" #include "openvswitch/ofp-switch.h" #include "openvswitch/ofp-table.h" #include "ovs-atomic.h" #include "ovs-rcu.h" #include "ovs-thread.h" #include "openvswitch/shash.h" #include "simap.h" #include "timeval.h" #include "tun-metadata.h" #include "versions.h" #include "vl-mff-map.h" struct match; struct ofputil_flow_mod; struct ofputil_packet_in_private; struct bfd_cfg; struct meter; struct ofoperation; struct ofproto_packet_out; struct rule_collection; struct smap; extern struct ovs_mutex ofproto_mutex; /* An OpenFlow switch. * * With few exceptions, ofproto implementations may look at these fields but * should not modify them. */ struct ofproto { struct hmap_node hmap_node; /* In global 'all_ofprotos' hmap. */ const struct ofproto_class *ofproto_class; char *type; /* Datapath type. */ char *name; /* Datapath name. */ /* Settings. */ uint64_t fallback_dpid; /* Datapath ID if no better choice found. */ uint64_t datapath_id; /* Datapath ID. */ bool forward_bpdu; /* Option to allow forwarding of BPDU frames * when NORMAL action is invoked. */ char *mfr_desc; /* Manufacturer (NULL for default). */ char *hw_desc; /* Hardware (NULL for default). */ char *sw_desc; /* Software version (NULL for default). */ char *serial_desc; /* Serial number (NULL for default). */ char *dp_desc; /* Datapath description (NULL for default). */ enum ofputil_frag_handling frag_handling; /* Datapath. */ struct hmap ports; /* Contains "struct ofport"s. */ struct shash port_by_name; struct simap ofp_requests; /* OpenFlow port number requests. */ uint16_t alloc_port_no; /* Last allocated OpenFlow port number. */ uint16_t max_ports; /* Max possible OpenFlow port num, plus one. */ struct hmap ofport_usage; /* Map ofport to last used time. */ uint64_t change_seq; /* Change sequence for netdev status. */ /* Flow tables. */ long long int eviction_group_timer; /* For rate limited reheapification. */ struct oftable *tables; int n_tables; ovs_version_t tables_version; /* Controls which rules are visible to * table lookups. */ /* Rules indexed on their cookie values, in all flow tables. */ struct hindex cookies OVS_GUARDED_BY(ofproto_mutex); struct hmap learned_cookies OVS_GUARDED_BY(ofproto_mutex); /* List of expirable flows, in all flow tables. */ struct ovs_list expirable OVS_GUARDED_BY(ofproto_mutex); /* List of flows to remove from flow tables. */ struct rule_collection *to_remove OVS_GUARDED_BY(ofproto_mutex); /* Meter table. */ struct ofputil_meter_features meter_features; struct hmap meters; /* uint32_t indexed 'struct meter *'. */ uint32_t slowpath_meter_id; /* Datapath slowpath meter. UINT32_MAX if not defined. */ uint32_t controller_meter_id; /* Datapath controller meter. UINT32_MAX if not defined. */ /* OpenFlow connections. */ struct connmgr *connmgr; int min_mtu; /* Current MTU of non-internal ports. */ /* Groups. */ struct cmap groups; /* Contains "struct ofgroup"s. */ uint32_t n_groups[4] OVS_GUARDED; /* # of existing groups of each type. */ struct ofputil_group_features ogf; /* Tunnel TLV mapping table. */ OVSRCU_TYPE(struct tun_table *) metadata_tab; /* Variable length mf_field mapping. Stores all configured variable length * meta-flow fields (struct mf_field) in a switch. */ struct vl_mff_map vl_mff_map; /* refcount to this ofproto, held by rule/group/xlate_caches */ struct ovs_refcount refcount; }; void ofproto_init_tables(struct ofproto *, int n_tables); void ofproto_init_max_ports(struct ofproto *, uint16_t max_ports); struct ofproto *ofproto_lookup(const char *name); struct ofport *ofproto_get_port(const struct ofproto *, ofp_port_t ofp_port); /* An OpenFlow port within a "struct ofproto". * * The port's name is netdev_get_name(port->netdev). * * With few exceptions, ofproto implementations may look at these fields but * should not modify them. */ struct ofport { struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */ struct ofproto *ofproto; /* The ofproto that contains this port. */ struct netdev *netdev; struct ofputil_phy_port pp; ofp_port_t ofp_port; /* OpenFlow port number. */ uint64_t change_seq; long long int created; /* Time created, in msec. */ int mtu; bool may_enable; /* May be live (OFPPS_LIVE) if link is up. */ }; void ofproto_port_set_enable(struct ofport *, bool enable); void ofproto_port_set_state(struct ofport *, enum ofputil_port_state); /* OpenFlow table flags: * * - "Hidden" tables are not included in OpenFlow operations that operate on * "all tables". For example, a request for flow stats on all tables will * omit flows in hidden tables, table stats requests will omit the table * entirely, and the switch features reply will not count the hidden table. * * However, operations that specifically name the particular table still * operate on it. For example, flow_mods and flow stats requests on a * hidden table work. * * To avoid gaps in table IDs (which have unclear validity in OpenFlow), * hidden tables must be the highest-numbered tables that a provider * implements. * * - "Read-only" tables can't be changed through OpenFlow operations. (At * the moment all flow table operations go effectively through OpenFlow, so * this means that read-only tables can't be changed at all after the * read-only flag is set.) * * The generic ofproto layer never sets these flags. An ofproto provider can * set them if it is appropriate. */ enum oftable_flags { OFTABLE_HIDDEN = 1 << 0, /* Hide from most OpenFlow operations. */ OFTABLE_READONLY = 1 << 1 /* Don't allow OpenFlow controller to change this table. */ }; /* A flow table within a "struct ofproto". * * * Thread-safety * ============= * * Adding or removing rules requires holding ofproto_mutex. * * Rules in 'cls' are RCU protected. For extended access to a rule, try * incrementing its ref_count with ofproto_rule_try_ref(), or * ofproto_rule_ref(), if the rule is still known to be in 'cls'. A rule * will be freed using ovsrcu_postpone() once its 'ref_count' reaches zero. * * Modifying a rule requires the rule's own mutex. * * Freeing a rule requires ofproto_mutex. After removing the rule from the * classifier, release a ref_count from the rule ('cls''s reference to the * rule). * * Refer to the thread-safety notes on struct rule for more information.*/ struct oftable { enum oftable_flags flags; struct classifier cls; /* Contains "struct rule"s. */ char *name; /* Table name exposed via OpenFlow, or NULL. */ int name_level; /* 0=name unset, 1=via OF, 2=via OVSDB. */ /* Maximum number of flows or UINT_MAX if there is no limit besides any * limit imposed by resource limitations. */ unsigned int max_flows; /* Current number of flows, not counting temporary duplicates nor deferred * deletions. */ unsigned int n_flows; /* These members determine the handling of an attempt to add a flow that * would cause the table to have more than 'max_flows' flows. * * If 'eviction_fields' is NULL, overflows will be rejected with an error. * * If 'eviction_fields' is nonnull (regardless of whether n_eviction_fields * is nonzero), an overflow will cause a flow to be removed. The flow to * be removed is chosen to give fairness among groups distinguished by * different values for the subfields within 'groups'. */ struct mf_subfield *eviction_fields; size_t n_eviction_fields; /* Eviction groups. * * When a flow is added that would cause the table to have more than * 'max_flows' flows, and 'eviction_fields' is nonnull, these groups are * used to decide which rule to evict: the rule is chosen from the eviction * group that contains the greatest number of rules.*/ uint32_t eviction_group_id_basis; struct hmap eviction_groups_by_id; struct heap eviction_groups_by_size; /* Flow table miss handling configuration. */ ATOMIC(enum ofputil_table_miss) miss_config; /* Eviction is enabled if either the client (vswitchd) enables it or an * OpenFlow controller enables it; thus, a nonzero value indicates that * eviction is enabled. */ #define EVICTION_CLIENT (1 << 0) /* Set to 1 if client enables eviction. */ #define EVICTION_OPENFLOW (1 << 1) /* Set to 1 if OpenFlow enables eviction. */ unsigned int eviction; /* If zero, vacancy events are disabled. If nonzero, this is the type of vacancy event that is enabled: either OFPTR_VACANCY_DOWN or OFPTR_VACANCY_UP. Only one type of vacancy event can be enabled at a time. */ enum ofp14_table_reason vacancy_event; /* Non-zero values for vacancy_up and vacancy_down indicates that vacancy * is enabled by table-mod, else these values are set to zero when * vacancy is disabled */ uint8_t vacancy_down; /* Vacancy threshold when space decreases (%). */ uint8_t vacancy_up; /* Vacancy threshold when space increases (%). */ atomic_ulong n_matched; atomic_ulong n_missed; }; /* Assigns TABLE to each oftable, in turn, in OFPROTO. * * All parameters are evaluated multiple times. */ #define OFPROTO_FOR_EACH_TABLE(TABLE, OFPROTO) \ for ((TABLE) = (OFPROTO)->tables; \ (TABLE) < &(OFPROTO)->tables[(OFPROTO)->n_tables]; \ (TABLE)++) /* An OpenFlow flow within a "struct ofproto". * * With few exceptions, ofproto implementations may look at these fields but * should not modify them. * * * Thread-safety * ============= * * Except near the beginning or ending of its lifespan, rule 'rule' belongs to * the classifier rule->ofproto->tables[rule->table_id].cls. The text below * calls this classifier 'cls'. * * Motivation * ---------- * * The thread safety rules described here for "struct rule" are motivated by * two goals: * * - Prevent threads that read members of "struct rule" from reading bad * data due to changes by some thread concurrently modifying those * members. * * - Prevent two threads making changes to members of a given "struct rule" * from interfering with each other. * * * Rules * ----- * * A rule 'rule' may be accessed without a risk of being freed by a thread * until the thread quiesces (i.e., rules are RCU protected and destructed * using ovsrcu_postpone()). Code that needs to hold onto a rule for a * while should increment 'rule->ref_count' either with ofproto_rule_ref() * (if 'ofproto_mutex' is held), or with ofproto_rule_try_ref() (when some * other thread might remove the rule from 'cls'). ofproto_rule_try_ref() * will fail if the rule has already been scheduled for destruction. * * 'rule->ref_count' protects 'rule' from being freed. It doesn't protect the * rule from being deleted from 'cls' (that's 'ofproto_mutex') and it doesn't * protect members of 'rule' from modification (that's 'rule->mutex'). * * 'rule->mutex' protects the members of 'rule' from modification. It doesn't * protect the rule from being deleted from 'cls' (that's 'ofproto_mutex') and * it doesn't prevent the rule from being freed (that's 'rule->ref_count'). * * Regarding thread safety, the members of a rule fall into the following * categories: * * - Immutable. These members are marked 'const'. * * - Members that may be safely read or written only by code holding * ofproto_mutex. These are marked OVS_GUARDED_BY(ofproto_mutex). * * - Members that may be safely read only by code holding ofproto_mutex or * 'rule->mutex', and safely written only by coding holding ofproto_mutex * AND 'rule->mutex'. These are marked OVS_GUARDED. */ enum OVS_PACKED_ENUM rule_state { RULE_INITIALIZED, /* Rule has been initialized, but not inserted to the * ofproto data structures. Versioning makes sure the * rule is not visible to lookups by other threads, even * if the rule is added to a classifier. */ RULE_INSERTED, /* Rule has been inserted to ofproto data structures and * may be visible to lookups by other threads. */ RULE_REMOVED, /* Rule has been removed from ofproto data structures, * and may still be visible to lookups by other threads * until they quiesce, after which the rule will be * removed from the classifier as well. */ }; struct rule { /* Where this rule resides in an OpenFlow switch. * * These are immutable once the rule is constructed, hence 'const'. */ struct ofproto *const ofproto; /* The ofproto that contains this rule. */ const struct cls_rule cr; /* In owning ofproto's classifier. */ const uint8_t table_id; /* Index in ofproto's 'tables' array. */ enum rule_state state; /* Protects members marked OVS_GUARDED. * Readers only need to hold this mutex. * Writers must hold both this mutex AND ofproto_mutex. * By implication writers can read *without* taking this mutex while they * hold ofproto_mutex. */ struct ovs_mutex mutex OVS_ACQ_AFTER(ofproto_mutex); /* Number of references. * The classifier owns one reference. * Any thread trying to keep a rule from being freed should hold its own * reference. */ struct ovs_refcount ref_count; /* A "flow cookie" is the OpenFlow name for a 64-bit value associated with * a flow. */ const ovs_be64 flow_cookie; /* Immutable once rule is constructed. */ struct hindex_node cookie_node OVS_GUARDED_BY(ofproto_mutex); enum ofputil_flow_mod_flags flags OVS_GUARDED; /* Timeouts. */ uint16_t hard_timeout OVS_GUARDED; /* In seconds from ->modified. */ uint16_t idle_timeout OVS_GUARDED; /* In seconds from ->used. */ /* Eviction precedence. */ const uint16_t importance; /* Removal reason for sending flow removed message. * Used only if 'flags' has OFPUTIL_FF_SEND_FLOW_REM set and if the * value is not OVS_OFPRR_NONE. */ uint8_t removed_reason; /* Eviction groups (see comment on struct eviction_group for explanation) . * * 'eviction_group' is this rule's eviction group, or NULL if it is not in * any eviction group. When 'eviction_group' is nonnull, 'evg_node' is in * the ->eviction_group->rules hmap. */ struct eviction_group *eviction_group OVS_GUARDED_BY(ofproto_mutex); struct heap_node evg_node OVS_GUARDED_BY(ofproto_mutex); /* OpenFlow actions. See struct rule_actions for more thread-safety * notes. */ const struct rule_actions * const actions; /* In owning meter's 'rules' list. An empty list if there is no meter. */ struct ovs_list meter_list_node OVS_GUARDED_BY(ofproto_mutex); /* Flow monitors (e.g. for NXST_FLOW_MONITOR, related to struct ofmonitor). * * 'add_seqno' is the sequence number when this rule was created. * 'modify_seqno' is the sequence number when this rule was last modified. * See 'monitor_seqno' in connmgr.c for more information. */ enum ofp14_flow_monitor_flags monitor_flags OVS_GUARDED_BY(ofproto_mutex); uint64_t add_seqno OVS_GUARDED_BY(ofproto_mutex); uint64_t modify_seqno OVS_GUARDED_BY(ofproto_mutex); /* Optimisation for flow expiry. In ofproto's 'expirable' list if this * rule is expirable, otherwise empty. */ struct ovs_list expirable OVS_GUARDED_BY(ofproto_mutex); /* Times. Last so that they are more likely close to the stats managed * by the provider. */ long long int created OVS_GUARDED; /* Creation time. */ /* Must hold 'mutex' for both read/write, 'ofproto_mutex' not needed. */ long long int modified OVS_GUARDED; /* Time of last modification. */ /* 1-bit for each present TLV in flow match / action. */ uint64_t match_tlv_bitmap; uint64_t ofpacts_tlv_bitmap; }; void ofproto_rule_ref(struct rule *); bool ofproto_rule_try_ref(struct rule *); void ofproto_rule_unref(struct rule *); static inline const struct rule_actions * rule_get_actions(const struct rule *); static inline bool rule_is_table_miss(const struct rule *); static inline bool rule_is_hidden(const struct rule *); /* A set of actions within a "struct rule". * * * Thread-safety * ============= * * A struct rule_actions may be accessed without a risk of being freed by * code that holds 'rule->mutex' (where 'rule' is the rule for which * 'rule->actions == actions') or during the RCU active period. * * All members are immutable: they do not change during the rule's * lifetime. */ struct rule_actions { /* Flags. * * 'has_meter' is true if 'ofpacts' contains an OFPACT_METER action. * * 'has_learn_with_delete' is true if 'ofpacts' contains an OFPACT_LEARN * action whose flags include NX_LEARN_F_DELETE_LEARNED. */ bool has_meter; bool has_learn_with_delete; bool has_groups; /* Actions. */ uint32_t ofpacts_len; /* Size of 'ofpacts', in bytes. */ struct ofpact ofpacts[]; /* Sequence of "struct ofpacts". */ }; BUILD_ASSERT_DECL(offsetof(struct rule_actions, ofpacts) % OFPACT_ALIGNTO == 0); const struct rule_actions *rule_actions_create(const struct ofpact *, size_t); void rule_actions_destroy(const struct rule_actions *); bool ofproto_rule_has_out_port(const struct rule *, ofp_port_t port) OVS_REQUIRES(ofproto_mutex); bool ofproto_rule_has_out_group(const struct rule *rule, uint32_t group_id) OVS_REQUIRES(ofproto_mutex); #define DECL_OFPROTO_COLLECTION(TYPE, NAME) \ DECL_OBJECT_COLLECTION(TYPE, NAME) \ static inline void NAME##_collection_ref(struct NAME##_collection *coll) \ { \ for (size_t i = 0; i < coll->collection.n; i++) { \ ofproto_##NAME##_ref((TYPE)coll->collection.objs[i]); \ } \ } \ \ static inline void NAME##_collection_unref(struct NAME##_collection *coll) \ { \ for (size_t i = 0; i < coll->collection.n; i++) { \ ofproto_##NAME##_unref((TYPE)coll->collection.objs[i]); \ } \ } DECL_OFPROTO_COLLECTION (struct rule *, rule) #define RULE_COLLECTION_FOR_EACH(RULE, RULES) \ for (size_t i__ = 0; \ i__ < rule_collection_n(RULES) \ ? (RULE = rule_collection_rules(RULES)[i__]) != NULL : false; \ i__++) /* Pairwise iteration through two rule collections that must be of the same * size. */ #define RULE_COLLECTIONS_FOR_EACH(RULE1, RULE2, RULES1, RULES2) \ for (size_t i__ = 0; \ i__ < rule_collection_n(RULES1) \ ? ((RULE1 = rule_collection_rules(RULES1)[i__]), \ (RULE2 = rule_collection_rules(RULES2)[i__]) != NULL) \ : false; \ i__++) /* Limits the number of flows allowed in the datapath. Only affects the * ofproto-dpif implementation. */ extern unsigned ofproto_flow_limit; /* Maximum idle time (in ms) for flows to be cached in the datapath. * Revalidators may expire flows more quickly than the configured value based * on system load and other factors. This variable is subject to change. */ extern unsigned ofproto_max_idle; /* Maximum timeout (in ms) for revalidator timer. * Revalidator timeout is a minimum of max_idle and max_revalidator values. */ extern unsigned ofproto_max_revalidator; /* Minimum pps that flow must have in order to be revalidated when revalidation * duration exceeds half of max-revalidator config variable. */ extern unsigned ofproto_min_revalidate_pps; /* Worst case delay (in ms) it might take before statistics of offloaded flows * are updated. Offloaded flows younger than this delay will always be * revalidated regardless of ofproto_min_revalidate_pps. */ extern unsigned ofproto_offloaded_stats_delay; /* Number of upcall handler and revalidator threads. Only affects the * ofproto-dpif implementation. */ extern uint32_t n_handlers, n_revalidators; static inline struct rule *rule_from_cls_rule(const struct cls_rule *); void ofproto_rule_expire(struct rule *rule, uint8_t reason) OVS_REQUIRES(ofproto_mutex); void ofproto_rule_delete(struct ofproto *, struct rule *) OVS_EXCLUDED(ofproto_mutex); void ofproto_rule_reduce_timeouts__(struct rule *rule, uint16_t idle_timeout, uint16_t hard_timeout) OVS_REQUIRES(ofproto_mutex) OVS_EXCLUDED(rule->mutex); void ofproto_rule_reduce_timeouts(struct rule *rule, uint16_t idle_timeout, uint16_t hard_timeout) OVS_EXCLUDED(ofproto_mutex); /* A group within a "struct ofproto", RCU-protected. * * With few exceptions, ofproto implementations may look at these fields but * should not modify them. */ struct ofgroup { struct cmap_node cmap_node; /* In ofproto's "groups" cmap. */ /* Group versioning. */ struct versions versions; /* Number of references. * * This is needed to keep track of references to the group in the xlate * module. * * If the main thread removes the group from an ofproto, we need to * guarantee that the group remains accessible to users of * xlate_group_actions and the xlate_cache, as the xlate_cache will not be * cleaned up until the corresponding datapath flows are revalidated. */ struct ovs_refcount ref_count; /* No lock is needed to protect the fields below since they are not * modified after construction. */ struct ofproto * const ofproto; /* The ofproto that contains this group. */ const uint32_t group_id; const enum ofp11_group_type type; /* One of OFPGT_*. */ bool being_deleted; /* Group removal has begun. */ const long long int created; /* Creation time. */ const long long int modified; /* Time of last modification. */ const struct ovs_list buckets; /* Contains "struct ofputil_bucket"s. */ const uint32_t n_buckets; struct ofputil_group_props props; struct rule_collection rules OVS_GUARDED; /* Referring rules. */ }; struct pkt_stats { uint64_t n_packets; uint64_t n_bytes; uint64_t n_offload_packets; /* n_offload_packets are a subset n_packets */ uint64_t n_offload_bytes; /* n_offload_bytes are a subset of n_bytes */ }; struct ofgroup *ofproto_group_lookup(const struct ofproto *ofproto, uint32_t group_id, ovs_version_t version, bool take_ref); void ofproto_group_ref(struct ofgroup *); bool ofproto_group_try_ref(struct ofgroup *); void ofproto_group_unref(struct ofgroup *); void ofproto_group_delete_all(struct ofproto *) OVS_EXCLUDED(ofproto_mutex); DECL_OFPROTO_COLLECTION (struct ofgroup *, group) #define GROUP_COLLECTION_FOR_EACH(GROUP, GROUPS) \ for (size_t i__ = 0; \ i__ < group_collection_n(GROUPS) \ ? (GROUP = group_collection_groups(GROUPS)[i__]) != NULL: false; \ i__++) /* Pairwise iteration through two group collections that must be of the same * size. */ #define GROUP_COLLECTIONS_FOR_EACH(GROUP1, GROUP2, GROUPS1, GROUPS2) \ for (size_t i__ = 0; \ i__ < group_collection_n(GROUPS1) \ ? ((GROUP1 = group_collection_groups(GROUPS1)[i__]), \ (GROUP2 = group_collection_groups(GROUPS2)[i__]) != NULL) \ : false; \ i__++) /* ofproto class structure, to be defined by each ofproto implementation. * * * Data Structures * =============== * * These functions work primarily with four different kinds of data * structures: * * - "struct ofproto", which represents an OpenFlow switch. * * - "struct ofport", which represents a port within an ofproto. * * - "struct rule", which represents an OpenFlow flow within an ofproto. * * - "struct ofgroup", which represents an OpenFlow 1.1+ group within an * ofproto. * * Each of these data structures contains all of the implementation-independent * generic state for the respective concept, called the "base" state. None of * them contains any extra space for ofproto implementations to use. Instead, * each implementation is expected to declare its own data structure that * contains an instance of the generic data structure plus additional * implementation-specific members, called the "derived" state. The * implementation can use casts or (preferably) the CONTAINER_OF macro to * obtain access to derived state given only a pointer to the embedded generic * data structure. * * * Life Cycle * ========== * * Four stylized functions accompany each of these data structures: * * "alloc" "construct" "destruct" "dealloc" * ------------ ---------------- --------------- -------------- * ofproto ->alloc ->construct ->destruct ->dealloc * ofport ->port_alloc ->port_construct ->port_destruct ->port_dealloc * rule ->rule_alloc ->rule_construct ->rule_destruct ->rule_dealloc * group ->group_alloc ->group_construct ->group_destruct ->group_dealloc * * "ofproto", "ofport", and "group" have this exact life cycle. The "rule" * data structure also follow this life cycle with some additional elaborations * described under "Rule Life Cycle" below. * * Any instance of a given data structure goes through the following life * cycle: * * 1. The client calls the "alloc" function to obtain raw memory. If "alloc" * fails, skip all the other steps. * * 2. The client initializes all of the data structure's base state. If this * fails, skip to step 7. * * 3. The client calls the "construct" function. The implementation * initializes derived state. It may refer to the already-initialized * base state. If "construct" fails, skip to step 6. * * 4. The data structure is now initialized and in use. * * 5. When the data structure is no longer needed, the client calls the * "destruct" function. The implementation uninitializes derived state. * The base state has not been uninitialized yet, so the implementation * may still refer to it. * * 6. The client uninitializes all of the data structure's base state. * * 7. The client calls the "dealloc" to free the raw memory. The * implementation must not refer to base or derived state in the data * structure, because it has already been uninitialized. * * Each "alloc" function allocates and returns a new instance of the respective * data structure. The "alloc" function is not given any information about the * use of the new data structure, so it cannot perform much initialization. * Its purpose is just to ensure that the new data structure has enough room * for base and derived state. It may return a null pointer if memory is not * available, in which case none of the other functions is called. * * Each "construct" function initializes derived state in its respective data * structure. When "construct" is called, all of the base state has already * been initialized, so the "construct" function may refer to it. The * "construct" function is allowed to fail, in which case the client calls the * "dealloc" function (but not the "destruct" function). * * Each "destruct" function uninitializes and frees derived state in its * respective data structure. When "destruct" is called, the base state has * not yet been uninitialized, so the "destruct" function may refer to it. The * "destruct" function is not allowed to fail. * * Each "dealloc" function frees raw memory that was allocated by the * "alloc" function. The memory's base and derived members might not have ever * been initialized (but if "construct" returned successfully, then it has been * "destruct"ed already). The "dealloc" function is not allowed to fail. * * * Conventions * =========== * * Most of these functions return 0 if they are successful or a positive error * code on failure. Depending on the function, valid error codes are either * errno values or OFPERR_* OpenFlow error codes. * * Most of these functions are expected to execute synchronously, that is, to * block as necessary to obtain a result. Thus, these functions may return * EAGAIN (or EWOULDBLOCK or EINPROGRESS) only where the function descriptions * explicitly say those errors are a possibility. We may relax this * requirement in the future if and when we encounter performance problems. */ struct ofproto_class { /* ## ----------------- ## */ /* ## Factory Functions ## */ /* ## ----------------- ## */ /* Initializes provider. The caller may pass in 'iface_hints', * which contains an shash of "struct iface_hint" elements indexed * by the interface's name. The provider may use these hints to * describe the startup configuration in order to reinitialize its * state. The caller owns the provided data, so a provider must * make copies of anything required. An ofproto provider must * remove any existing state that is not described by the hint, and * may choose to remove it all. */ void (*init)(const struct shash *iface_hints); /* Enumerates the types of all supported ofproto types into 'types'. The * caller has already initialized 'types'. The implementation should add * its own types to 'types' but not remove any existing ones, because other * ofproto classes might already have added names to it. */ void (*enumerate_types)(struct sset *types); /* Enumerates the names of all existing datapath of the specified 'type' * into 'names' 'all_dps'. The caller has already initialized 'names' as * an empty sset. * * 'type' is one of the types enumerated by ->enumerate_types(). * * Returns 0 if successful, otherwise a positive errno value. */ int (*enumerate_names)(const char *type, struct sset *names); /* Deletes the datapath with the specified 'type' and 'name'. The caller * should have closed any open ofproto with this 'type' and 'name'; this * function is allowed to fail if that is not the case. * * 'type' is one of the types enumerated by ->enumerate_types(). * 'name' is one of the names enumerated by ->enumerate_names() for 'type'. * * Returns 0 if successful, otherwise a positive errno value. */ int (*del)(const char *type, const char *name); /* Returns the type to pass to netdev_open() when a datapath of type * 'datapath_type' has a port of type 'port_type', for a few special * cases when a netdev type differs from a port type. For example, * when using the userspace datapath, a port of type "internal" * needs to be opened as "tap". * * Returns either 'type' itself or a string literal, which must not * be freed. */ const char *(*port_open_type)(const char *datapath_type, const char *port_type); /* ## ------------------------ ## */ /* ## Top-Level type Functions ## */ /* ## ------------------------ ## */ /* Performs any periodic activity required on ofprotos of type * 'type'. * * An ofproto provider may implement it or not, depending on whether * it needs type-level maintenance. * * Returns 0 if successful, otherwise a positive errno value. */ int (*type_run)(const char *type); /* Causes the poll loop to wake up when a type 'type''s 'run' * function needs to be called, e.g. by calling the timer or fd * waiting functions in poll-loop.h. * * An ofproto provider may implement it or not, depending on whether * it needs type-level maintenance. */ void (*type_wait)(const char *type); /* ## --------------------------- ## */ /* ## Top-Level ofproto Functions ## */ /* ## --------------------------- ## */ /* Life-cycle functions for an "ofproto" (see "Life Cycle" above). * * * Construction * ============ * * ->construct() should not modify any base members of the ofproto. The * client will initialize the ofproto's 'ports' and 'tables' members after * construction is complete. * * When ->construct() is called, the client does not yet know how many flow * tables the datapath supports, so ofproto->n_tables will be 0 and * ofproto->tables will be NULL. ->construct() should call * ofproto_init_tables() to allocate and initialize ofproto->n_tables and * ofproto->tables. Each flow table will be initially empty, so * ->construct() should delete flows from the underlying datapath, if * necessary, rather than populating the tables. * * If the ofproto knows the maximum port number that the datapath can have, * then it can call ofproto_init_max_ports(). If it does so, then the * client will ensure that the actions it allows to be used through * OpenFlow do not refer to ports above that maximum number. * * Only one ofproto instance needs to be supported for any given datapath. * If a datapath is already open as part of one "ofproto", then another * attempt to "construct" the same datapath as part of another ofproto is * allowed to fail with an error. * * ->construct() returns 0 if successful, otherwise a positive errno * value. * * * Destruction * =========== * * ->destruct() must also destroy all remaining rules in the ofproto's * tables, by passing each remaining rule to ofproto_rule_delete(), then * destroy all remaining groups by calling ofproto_group_delete_all(). * * The client will destroy the flow tables themselves after ->destruct() * returns. */ struct ofproto *(*alloc)(void); int (*construct)(struct ofproto *ofproto); void (*destruct)(struct ofproto *ofproto, bool del); void (*dealloc)(struct ofproto *ofproto); /* Performs any periodic activity required by 'ofproto'. It should: * * - Call connmgr_send_packet_in() for each received packet that missed * in the OpenFlow flow table or that had a OFPP_CONTROLLER output * action. * * - Call ofproto_rule_expire() for each OpenFlow flow that has reached * its hard_timeout or idle_timeout, to expire the flow. * * Returns 0 if successful, otherwise a positive errno value. */ int (*run)(struct ofproto *ofproto); /* Causes the poll loop to wake up when 'ofproto''s 'run' function needs to * be called, e.g. by calling the timer or fd waiting functions in * poll-loop.h. */ void (*wait)(struct ofproto *ofproto); /* Adds some memory usage statistics for the implementation of 'ofproto' * into 'usage', for use with memory_report(). * * This function is optional. */ void (*get_memory_usage)(const struct ofproto *ofproto, struct simap *usage); /* Adds some memory usage statistics for the implementation of 'type' * into 'usage', for use with memory_report(). * * This function is optional. */ void (*type_get_memory_usage)(const char *type, struct simap *usage); /* Every "struct rule" in 'ofproto' is about to be deleted, one by one. * This function may prepare for that, for example by clearing state in * advance. It should *not* actually delete any "struct rule"s from * 'ofproto', only prepare for it. * * This function is optional; it's really just for optimization in case * it's cheaper to delete all the flows from your hardware in a single pass * than to do it one by one. */ void (*flush)(struct ofproto *ofproto); /* Helper for the OpenFlow OFPT_TABLE_FEATURES request. * * The 'features' array contains 'ofproto->n_tables' elements. Each * element is initialized as: * * - 'table_id' to the array index. * * - 'name' to "table#" where # is the table ID. * * - 'metadata_match' and 'metadata_write' to OVS_BE64_MAX. * * - 'config' to the table miss configuration. * * - 'max_entries' to 1,000,000. * * - Both 'nonmiss' and 'miss' to: * * * 'next' to all 1-bits for all later tables. * * * 'instructions' to all instructions. * * * 'write' and 'apply' both to: * * - 'ofpacts': All actions. * * - 'set_fields': All fields. * * - 'match', 'mask', and 'wildcard' to all fields. * * If 'stats' is nonnull, it also contains 'ofproto->n_tables' elements. * Each element is initialized as: * * - 'table_id' to the array index. * * - 'active_count' to the 'n_flows' of struct ofproto for the table. * * - 'lookup_count' and 'matched_count' to 0. * * The implementation should update any members in each element for which * it has better values: * * - Any member of 'features' to better describe the implementation's * capabilities. * * - 'lookup_count' to the number of packets looked up in this flow table * so far. * * - 'matched_count' to the number of packets looked up in this flow * table so far that matched one of the flow entries. */ void (*query_tables)(struct ofproto *ofproto, struct ofputil_table_features *features, struct ofputil_table_stats *stats); /* Helper for the OFPT_TABLE_FEATURES request. * * A controller is requesting that the table features be updated from 'old' * to 'new', where 'old' is the features currently in use as previously * initialized by 'query_tables'. * * If this function is nonnull, then it should either update the table * features or return an OpenFlow error. The update should be * all-or-nothing. * * If this function is null, then only updates that eliminate table * features will be allowed. Such updates have no actual effect. This * implementation is acceptable because OpenFlow says that a table's * features may be a superset of those requested. */ enum ofperr (*modify_tables)(struct ofproto *ofproto, const struct ofputil_table_features *old, const struct ofputil_table_features *new); /* Sets the current tables version the provider should use for classifier * lookups. This must be called with a new version number after each set * of flow table changes has been completed, so that datapath revalidation * can be triggered. */ void (*set_tables_version)(struct ofproto *ofproto, ovs_version_t version); /* ## ---------------- ## */ /* ## ofport Functions ## */ /* ## ---------------- ## */ /* Life-cycle functions for a "struct ofport" (see "Life Cycle" above). * * ->port_construct() should not modify any base members of the ofport. * An ofproto implementation should use the 'ofp_port' member of * "struct ofport" as the OpenFlow port number. * * ofports are managed by the base ofproto code. The ofproto * implementation should only create and destroy them in response to calls * to these functions. The base ofproto code will create and destroy * ofports in the following situations: * * - Just after the ->construct() function is called, the base ofproto * iterates over all of the implementation's ports, using * ->port_dump_start() and related functions, and constructs an ofport * for each dumped port. * * - If ->port_poll() reports that a specific port has changed, then the * base ofproto will query that port with ->port_query_by_name() and * construct or destruct ofports as necessary to reflect the updated * set of ports. * * - If ->port_poll() returns ENOBUFS to report an unspecified port set * change, then the base ofproto will iterate over all of the * implementation's ports, in the same way as at ofproto * initialization, and construct and destruct ofports to reflect all of * the changes. * * - On graceful shutdown, the base ofproto code will destruct all * the ports. * * ->port_construct() returns 0 if successful, otherwise a positive errno * value. * * * ->port_destruct() * ================= * * ->port_destruct() takes a 'del' parameter. If the provider implements * the datapath itself (e.g. dpif-netdev, it can ignore 'del'. On the * other hand, if the provider is an interface to an external datapath * (e.g. to a kernel module that implement the datapath) then 'del' should * influence destruction behavior in the following way: * * - If 'del' is true, it should remove the port from the underlying * implementation. This is the common case. * * - If 'del' is false, it should leave the port in the underlying * implementation. This is used when Open vSwitch is performing a * graceful shutdown and ensures that, across Open vSwitch restarts, * the underlying ports are not removed and recreated. That makes an * important difference for, e.g., "internal" ports that have * configured IP addresses; without this distinction, the IP address * and other configured state for the port is lost. */ struct ofport *(*port_alloc)(void); int (*port_construct)(struct ofport *ofport); void (*port_destruct)(struct ofport *ofport, bool del); void (*port_dealloc)(struct ofport *ofport); /* Called after 'ofport->netdev' is replaced by a new netdev object. If * the ofproto implementation uses the ofport's netdev internally, then it * should switch to using the new one. The old one has been closed. * * An ofproto implementation that doesn't need to do anything in this * function may use a null pointer. */ void (*port_modified)(struct ofport *ofport); /* Called after an OpenFlow request changes a port's configuration. * 'ofport->pp.config' contains the new configuration. 'old_config' * contains the previous configuration. * * The caller implements OFPUTIL_PC_PORT_DOWN using netdev functions to * turn NETDEV_UP on and off, so this function doesn't have to do anything * for that bit (and it won't be called if that is the only bit that * changes). */ void (*port_reconfigured)(struct ofport *ofport, enum ofputil_port_config old_config); /* Looks up a port named 'devname' in 'ofproto'. On success, returns 0 and * initializes '*port' appropriately. Otherwise, returns a positive errno * value. * * The caller owns the data in 'port' and must free it with * ofproto_port_destroy() when it is no longer needed. */ int (*port_query_by_name)(const struct ofproto *ofproto, const char *devname, struct ofproto_port *port); /* Attempts to add 'netdev' as a port on 'ofproto'. Returns 0 if * successful, otherwise a positive errno value. The caller should * inform the implementation of the OpenFlow port through the * ->port_construct() method. * * It doesn't matter whether the new port will be returned by a later call * to ->port_poll(); the implementation may do whatever is more * convenient. */ int (*port_add)(struct ofproto *ofproto, struct netdev *netdev); /* Deletes port number 'ofp_port' from the datapath for 'ofproto'. Returns * 0 if successful, otherwise a positive errno value. * * It doesn't matter whether the new port will be returned by a later call * to ->port_poll(); the implementation may do whatever is more * convenient. */ int (*port_del)(struct ofproto *ofproto, ofp_port_t ofp_port); /* Refreshes datapath configuration of 'port'. * Returns 0 if successful, otherwise a positive errno value. */ int (*port_set_config)(const struct ofport *port, const struct smap *cfg); /* Get port stats */ int (*port_get_stats)(const struct ofport *port, struct netdev_stats *stats); /* Get status of the virtual port (ex. tunnel, patch). * * Returns '0' if 'port' is not a virtual port or has no errors. * Otherwise, stores the error string in '*errp' and returns positive errno * value. The caller is responsible for freeing '*errp' (with free()). * * This function may be a null pointer if the ofproto implementation does * not support any virtual ports or their states. */ int (*vport_get_status)(const struct ofport *port, char **errp); /* Port iteration functions. * * The client might not be entirely in control of the ports within an * ofproto. Some hardware implementations, for example, might have a fixed * set of ports in a datapath. For this reason, the client needs a way to * iterate through all the ports that are actually in a datapath. These * functions provide that functionality. * * The 'state' pointer provides the implementation a place to * keep track of its position. Its format is opaque to the caller. * * The ofproto provider retains ownership of the data that it stores into * ->port_dump_next()'s 'port' argument. The data must remain valid until * at least the next call to ->port_dump_next() or ->port_dump_done() for * 'state'. The caller will not modify or free it. * * Details * ======= * * ->port_dump_start() attempts to begin dumping the ports in 'ofproto'. * On success, it should return 0 and initialize '*statep' with any data * needed for iteration. On failure, returns a positive errno value, and * the client will not call ->port_dump_next() or ->port_dump_done(). * * ->port_dump_next() attempts to retrieve another port from 'ofproto' for * 'state'. If there is another port, it should store the port's * information into 'port' and return 0. It should return EOF if all ports * have already been iterated. Otherwise, on error, it should return a * positive errno value. This function will not be called again once it * returns nonzero once for a given iteration (but the 'port_dump_done' * function will be called afterward). * * ->port_dump_done() allows the implementation to release resources used * for iteration. The caller might decide to stop iteration in the middle * by calling this function before ->port_dump_next() returns nonzero. * * Usage Example * ============= * * int error; * void *state; * * error = ofproto->ofproto_class->port_dump_start(ofproto, &state); * if (!error) { * for (;;) { * struct ofproto_port port; * * error = ofproto->ofproto_class->port_dump_next( * ofproto, state, &port); * if (error) { * break; * } * ...Do something with 'port' here (without modifying or freeing * any of its data)... * } * ofproto->ofproto_class->port_dump_done(ofproto, state); * } * ...'error' is now EOF (success) or a positive errno value (failure)... */ int (*port_dump_start)(const struct ofproto *ofproto, void **statep); int (*port_dump_next)(const struct ofproto *ofproto, void *state, struct ofproto_port *port); int (*port_dump_done)(const struct ofproto *ofproto, void *state); /* Polls for changes in the set of ports in 'ofproto'. If the set of ports * in 'ofproto' has changed, then this function should do one of the * following: * * - Preferably: store the name of the device that was added to or deleted * from 'ofproto' in '*devnamep' and return 0. The caller is responsible * for freeing '*devnamep' (with free()) when it no longer needs it. * * - Alternatively: return ENOBUFS, without indicating the device that was * added or deleted. * * Occasional 'false positives', in which the function returns 0 while * indicating a device that was not actually added or deleted or returns * ENOBUFS without any change, are acceptable. * * The purpose of 'port_poll' is to let 'ofproto' know about changes made * externally to the 'ofproto' object, e.g. by a system administrator via * ovs-dpctl. Therefore, it's OK, and even preferable, for port_poll() to * not report changes made through calls to 'port_add' or 'port_del' on the * same 'ofproto' object. (But it's OK for it to report them too, just * slightly less efficient.) * * If the set of ports in 'ofproto' has not changed, returns EAGAIN. May * also return other positive errno values to indicate that something has * gone wrong. * * If the set of ports in a datapath is fixed, or if the only way that the * set of ports in a datapath can change is through ->port_add() and * ->port_del(), then this function may be a null pointer. */ int (*port_poll)(const struct ofproto *ofproto, char **devnamep); /* Arranges for the poll loop to wake up when ->port_poll() will return a * value other than EAGAIN. * * If the set of ports in a datapath is fixed, or if the only way that the * set of ports in a datapath can change is through ->port_add() and * ->port_del(), or if the poll loop will always wake up anyway when * ->port_poll() will return a value other than EAGAIN, then this function * may be a null pointer. */ void (*port_poll_wait)(const struct ofproto *ofproto); /* Checks the status of LACP negotiation for 'port'. Returns 1 if LACP * partner information for 'port' is up-to-date, 0 if LACP partner * information is not current (generally indicating a connectivity * problem), or -1 if LACP is not enabled on 'port'. * * This function may be a null pointer if the ofproto implementation does * not support LACP. */ int (*port_is_lacp_current)(const struct ofport *port); /* Get LACP port stats. Returns -1 if LACP is not enabled on 'port'. * * This function may be a null pointer if the ofproto implementation does * not support LACP. */ int (*port_get_lacp_stats)(const struct ofport *port, struct lacp_member_stats *stats); /* ## ----------------------- ## */ /* ## OpenFlow Rule Functions ## */ /* ## ----------------------- ## */ /* Chooses an appropriate table for 'match' within 'ofproto'. On * success, stores the table ID into '*table_idp' and returns 0. On * failure, returns an OpenFlow error code. * * The choice of table should be a function of 'match' and 'ofproto''s * datapath capabilities. It should not depend on the flows already in * 'ofproto''s flow tables. Failure implies that an OpenFlow rule with * 'match' as its matching condition can never be inserted into 'ofproto', * even starting from an empty flow table. * * If multiple tables are candidates for inserting the flow, the function * should choose one arbitrarily (but deterministically). * * If this function is NULL then table 0 is always chosen. */ enum ofperr (*rule_choose_table)(const struct ofproto *ofproto, const struct minimatch *match, uint8_t *table_idp); /* Life-cycle functions for a "struct rule". * * * Rule Life Cycle * =============== * * The life cycle of a struct rule is an elaboration of the basic life * cycle described above under "Life Cycle". * * After a rule is successfully constructed, it is then inserted. If * insertion is successful, then before it is later destructed, it is * deleted. * * You can think of a rule as having the following extra steps inserted * between "Life Cycle" steps 4 and 5: * * 4.1. The client inserts the rule into the flow table, making it * visible in flow table lookups. * * 4.2. The client calls "rule_insert" to insert the flow. The * implementation attempts to install the flow in the underlying * hardware and returns an error code indicate success or failure. * On failure, go to step 5. * * 4.3. The rule is now installed in the flow table. Eventually it will * be deleted. * * 4.4. The client removes the rule from the flow table. It is no longer * visible in flow table lookups. * * 4.5. The client calls "rule_delete". The implementation uninstalls * the flow from the underlying hardware. Deletion is not allowed * to fail. * * * Construction * ============ * * When ->rule_construct() is called, 'rule' is a new rule that is not yet * inserted into a flow table. ->rule_construct() should initialize enough * of the rule's derived state for 'rule' to be suitable for inserting into * a flow table. ->rule_construct() should not modify any base members of * struct rule. * * If ->rule_construct() fails (as indicated by returning a nonzero * OpenFlow error code), the ofproto base code will uninitialize and * deallocate 'rule'. See "Rule Life Cycle" above for more details. * * ->rule_construct() must also: * * - Validate that the datapath supports the matching rule in 'rule->cr' * datapath. For example, if the rule's table does not support * registers, then it is an error if 'rule->cr' does not wildcard all * registers. * * - Validate that the datapath can correctly implement 'rule->ofpacts'. * * After a successful construction the rest of the rule life cycle calls * may not fail, so ->rule_construct() must also make sure that the rule * can be inserted in to the datapath. * * * Insertion * ========= * * Following successful construction, the ofproto base case inserts 'rule' * into its flow table, then it calls ->rule_insert(). ->rule_insert() * must add the new rule to the datapath flow table and return only after * this is complete. The 'new_rule' may be a duplicate of an 'old_rule'. * In this case the 'old_rule' is non-null, and the implementation should * forward rule statistics counts from the 'old_rule' to the 'new_rule' if * 'forward_counts' is 'true', 'used' timestamp is always forwarded. This * may not fail. * * * Deletion * ======== * * The ofproto base code removes 'rule' from its flow table before it calls * ->rule_delete() (if non-null). ->rule_delete() must remove 'rule' from * the datapath flow table and return only after this has completed * successfully. * * Rule deletion must not fail. * * * Destruction * =========== * * ->rule_destruct() must uninitialize derived state. * * Rule destruction must not fail. */ struct rule *(*rule_alloc)(void); enum ofperr (*rule_construct)(struct rule *rule) /* OVS_REQUIRES(ofproto_mutex) */; enum ofperr (*rule_insert)(struct rule *rule, struct rule *old_rule, bool forward_counts) /* OVS_REQUIRES(ofproto_mutex) */; void (*rule_delete)(struct rule *rule) /* OVS_REQUIRES(ofproto_mutex) */; void (*rule_destruct)(struct rule *rule); void (*rule_dealloc)(struct rule *rule); /* Obtains statistics for 'rule', storing the number of packets that have * matched it in '*packet_count' and the number of bytes in those packets * in '*byte_count'. UINT64_MAX indicates that the packet count or byte * count is unknown. */ void (*rule_get_stats)(struct rule *rule, struct pkt_stats *stats, long long int *used) /* OVS_EXCLUDED(ofproto_mutex) */; /* Translates actions in 'opo->ofpacts', for 'opo->packet' in flow tables * in version 'opo->version'. This is useful for OpenFlow OFPT_PACKET_OUT. * * This function must validate that it can correctly translate * 'opo->ofpacts'. If not, then it should return an OpenFlow error code. * * 'opo->flow' reflects the flow information for 'opo->packet'. All of the * information in 'opo->flow' is extracted from 'opo->packet', except for * 'in_port', which is assigned to the correct value for the incoming * packet. 'tunnel' and register values should be zeroed. 'packet''s * header pointers and offsets (e.g. packet->l3) are appropriately * initialized. packet->l3 is aligned on a 32-bit boundary. * * Returns 0 if successful, otherwise an OpenFlow error code. * * This function may be called with 'ofproto_mutex' held. */ enum ofperr (*packet_xlate)(struct ofproto *, struct ofproto_packet_out *opo); /* Free resources taken by a successful packet_xlate(). If multiple * packet_xlate() calls have been made in sequence, the corresponding * packet_xlate_revert() calls have to be made in reverse order. */ void (*packet_xlate_revert)(struct ofproto *, struct ofproto_packet_out *); /* Translates side-effects, and stats as produced by ->packet_xlate(). * Prepares to execute datapath actions. The caller retains ownership * of 'opo'. */ void (*packet_execute_prepare)(struct ofproto *, struct ofproto_packet_out *opo); /* Executes the datapath actions. The caller retains ownership of 'opo'. * Should be called after successful packet_execute_prepare(). * No-op if called after packet_xlate_revert(). */ void (*packet_execute)(struct ofproto *, struct ofproto_packet_out *opo); /* Changes the OpenFlow IP fragment handling policy to 'frag_handling', * which takes one of the following values, with the corresponding * meanings: * * - OFPUTIL_FRAG_NORMAL: The switch should treat IP fragments the same * way as other packets, omitting TCP and UDP port numbers (always * setting them to 0). * * - OFPUTIL_FRAG_DROP: The switch should drop all IP fragments without * passing them through the flow table. * * - OFPUTIL_FRAG_REASM: The switch should reassemble IP fragments before * passing packets through the flow table. * * - OFPUTIL_FRAG_NX_MATCH (a Nicira extension): Similar to * OFPUTIL_FRAG_NORMAL, except that TCP and UDP port numbers should be * included in fragments with offset 0. * * Implementations are not required to support every mode. * OFPUTIL_FRAG_NORMAL is the default mode when an ofproto is created. * * At the time of the call to ->set_frag_handling(), the current mode is * available in 'ofproto->frag_handling'. ->set_frag_handling() returns * true if the requested mode was set, false if it is not supported. * * Upon successful return, the caller changes 'ofproto->frag_handling' to * reflect the new mode. */ bool (*set_frag_handling)(struct ofproto *ofproto, enum ofputil_frag_handling frag_handling); enum ofperr (*nxt_resume)(struct ofproto *ofproto, const struct ofputil_packet_in_private *); /* ## ------------------------- ## */ /* ## OFPP_NORMAL configuration ## */ /* ## ------------------------- ## */ /* Configures NetFlow on 'ofproto' according to the options in * 'netflow_options', or turns off NetFlow if 'netflow_options' is NULL. * * EOPNOTSUPP as a return value indicates that 'ofproto' does not support * NetFlow, as does a null pointer. */ int (*set_netflow)(struct ofproto *ofproto, const struct netflow_options *netflow_options); void (*get_netflow_ids)(const struct ofproto *ofproto, uint8_t *engine_type, uint8_t *engine_id); /* Configures sFlow on 'ofproto' according to the options in * 'sflow_options', or turns off sFlow if 'sflow_options' is NULL. * * EOPNOTSUPP as a return value indicates that 'ofproto' does not support * sFlow, as does a null pointer. */ int (*set_sflow)(struct ofproto *ofproto, const struct ofproto_sflow_options *sflow_options); /* Configures IPFIX on 'ofproto' according to the options in * 'bridge_exporter_options' and the 'flow_exporters_options' * array, or turns off IPFIX if 'bridge_exporter_options' and * 'flow_exporters_options' is NULL. * * EOPNOTSUPP as a return value indicates that 'ofproto' does not support * IPFIX, as does a null pointer. */ int (*set_ipfix)( struct ofproto *ofproto, const struct ofproto_ipfix_bridge_exporter_options *bridge_exporter_options, const struct ofproto_ipfix_flow_exporter_options *flow_exporters_options, size_t n_flow_exporters_options); /* Gets IPFIX stats on 'ofproto' according to the exporter of birdge * IPFIX or flow-based IPFIX. * * OFPERR_NXST_NOT_CONFIGURED as a return value indicates that bridge * IPFIX or flow-based IPFIX is not configured. */ int (*get_ipfix_stats)( const struct ofproto *ofproto, bool bridge_ipfix, struct ovs_list *replies ); /* Configures connectivity fault management on 'ofport'. * * If 'cfm_settings' is nonnull, configures CFM according to its members. * * If 'cfm_settings' is null, removes any connectivity fault management * configuration from 'ofport'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support CFM, as does a null pointer. */ int (*set_cfm)(struct ofport *ofport, const struct cfm_settings *s); /* Checks the status change of CFM on 'ofport'. Returns true if * there is status change since last call or if CFM is not specified. */ bool (*cfm_status_changed)(struct ofport *ofport); /* Populates 'smap' with the status of CFM on 'ofport'. Returns 0 on * success, or a positive errno. EOPNOTSUPP as a return value indicates * that this ofproto_class does not support CFM, as does a null pointer. * * The caller must provide and own '*status', and it must free the array * returned in 'status->rmps'. '*status' is indeterminate if the return * value is non-zero. */ int (*get_cfm_status)(const struct ofport *ofport, struct cfm_status *status); /* Configures LLDP on 'ofport'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support LLDP, as does a null pointer. */ int (*set_lldp)(struct ofport *ofport, const struct smap *cfg); /* Checks the status of LLDP configured on 'ofport'. Returns true if the * port's LLDP status was successfully stored into '*status'. Returns * false if the port did not have LLDP configured, in which case '*status' * is indeterminate. * * The caller must provide and own '*status'. '*status' is indeterminate * if the return value is non-zero. */ bool (*get_lldp_status)(const struct ofport *ofport, struct lldp_status *status); /* Configures Auto Attach. * * If 's' is nonnull, configures Auto Attach according to its members. * * If 's' is null, removes any Auto Attach configuration. */ int (*set_aa)(struct ofproto *ofproto, const struct aa_settings *s); /* If 's' is nonnull, this function registers a mapping associated with * client data pointer 'aux' in 'ofproto'. If 'aux' is already registered * then this function updates its configuration to 's'. Otherwise, this * function registers a new mapping. * * An implementation that does not support mapping at all may set * it to NULL or return EOPNOTSUPP. An implementation that supports * only a subset of the functionality should implement what it can * and return 0. */ int (*aa_mapping_set)(struct ofproto *ofproto, void *aux, const struct aa_mapping_settings *s); /* If 's' is nonnull, this function unregisters a mapping associated with * client data pointer 'aux' in 'ofproto'. If 'aux' is already registered * then this function updates its configuration to 's'. Otherwise, this * function unregisters a new mapping. * * An implementation that does not support mapping at all may set * it to NULL or return EOPNOTSUPP. An implementation that supports * only a subset of the functionality should implement what it can * and return 0. */ int (*aa_mapping_unset)(struct ofproto *ofproto, void *aux); /* * Returns the a list of AutoAttach VLAN operations. When Auto Attach is * enabled, the VLAN associated with an I-SID/VLAN mapping is first * negotiated with an Auto Attach Server. Once an I-SID VLAN mapping * becomes active, the corresponding VLAN needs to be communicated to the * bridge in order to add the VLAN to the trunk port linking the Auto * Attach Client (in this case openvswitch) and the Auto Attach Server. * * The list entries are of type "struct bridge_aa_vlan". Each entry * specifies the operation (add or remove), the interface on which to * execute the operation and the VLAN. */ int (*aa_vlan_get_queued)(struct ofproto *ofproto, struct ovs_list *list); /* * Returns the current number of entries in the list of VLAN operations * in the Auto Attach Client (see previous function description * aa_vlan_get_queued). Returns 0 if Auto Attach is disabled. */ unsigned int (*aa_vlan_get_queue_size)(struct ofproto *ofproto); /* Configures BFD on 'ofport'. * * If 'cfg' is NULL, or 'cfg' does not contain the key value pair * "enable=true", removes BFD from 'ofport'. Otherwise, configures BFD * according to 'cfg'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support BFD, as does a null pointer. */ int (*set_bfd)(struct ofport *ofport, const struct smap *cfg); /* Checks the status change of BFD on 'ofport'. Returns true if there * is status change since last call or if BFD is not specified. */ bool (*bfd_status_changed)(struct ofport *ofport); /* Populates 'smap' with the status of BFD on 'ofport'. Returns 0 on * success, or a positive errno. EOPNOTSUPP as a return value indicates * that this ofproto_class does not support BFD, as does a null pointer. */ int (*get_bfd_status)(struct ofport *ofport, struct smap *smap); /* Configures spanning tree protocol (STP) on 'ofproto' using the * settings defined in 's'. * * If 's' is nonnull, configures STP according to its members. * * If 's' is null, removes any STP configuration from 'ofproto'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support STP, as does a null pointer. */ int (*set_stp)(struct ofproto *ofproto, const struct ofproto_stp_settings *s); /* Retrieves state of spanning tree protocol (STP) on 'ofproto'. * * Stores STP state for 'ofproto' in 's'. If the 'enabled' member * is false, the other member values are not meaningful. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support STP, as does a null pointer. */ int (*get_stp_status)(struct ofproto *ofproto, struct ofproto_stp_status *s); /* Configures spanning tree protocol (STP) on 'ofport' using the * settings defined in 's'. * * If 's' is nonnull, configures STP according to its members. The * caller is responsible for assigning STP port numbers (using the * 'port_num' member in the range of 1 through 255, inclusive) and * ensuring there are no duplicates. * * If 's' is null, removes any STP configuration from 'ofport'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support STP, as does a null pointer. */ int (*set_stp_port)(struct ofport *ofport, const struct ofproto_port_stp_settings *s); /* Retrieves spanning tree protocol (STP) port status of 'ofport'. * * Stores STP state for 'ofport' in 's'. If the 'enabled' member is * false, the other member values are not meaningful. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support STP, as does a null pointer. */ int (*get_stp_port_status)(struct ofport *ofport, struct ofproto_port_stp_status *s); /* Retrieves spanning tree protocol (STP) port statistics of 'ofport'. * * Stores STP state for 'ofport' in 's'. If the 'enabled' member is * false, the other member values are not meaningful. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support STP, as does a null pointer. */ int (*get_stp_port_stats)(struct ofport *ofport, struct ofproto_port_stp_stats *s); /* Configures Rapid Spanning Tree Protocol (RSTP) on 'ofproto' using the * settings defined in 's'. * * If 's' is nonnull, configures RSTP according to its members. * * If 's' is null, removes any RSTP configuration from 'ofproto'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support RSTP, as does a null pointer. */ void (*set_rstp)(struct ofproto *ofproto, const struct ofproto_rstp_settings *s); /* Retrieves state of Rapid Spanning Tree Protocol (RSTP) on 'ofproto'. * * Stores RSTP state for 'ofproto' in 's'. If the 'enabled' member * is false, the other member values are not meaningful. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support RSTP, as does a null pointer. */ void (*get_rstp_status)(struct ofproto *ofproto, struct ofproto_rstp_status *s); /* Configures Rapid Spanning Tree Protocol (RSTP) on 'ofport' using the * settings defined in 's'. * * If 's' is nonnull, configures RSTP according to its members. The * caller is responsible for assigning RSTP port numbers (using the * 'port_num' member in the range of 1 through 255, inclusive) and * ensuring there are no duplicates. * * If 's' is null, removes any RSTP configuration from 'ofport'. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support STP, as does a null pointer. */ void (*set_rstp_port)(struct ofport *ofport, const struct ofproto_port_rstp_settings *s); /* Retrieves Rapid Spanning Tree Protocol (RSTP) port status of 'ofport'. * * Stores RSTP state for 'ofport' in 's'. If the 'enabled' member is * false, the other member values are not meaningful. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support RSTP, as does a null pointer. */ void (*get_rstp_port_status)(struct ofport *ofport, struct ofproto_port_rstp_status *s); /* Registers meta-data associated with the 'n_qdscp' Qualities of Service * 'queues' attached to 'ofport'. This data is not intended to be * sufficient to implement QoS. Instead, providers may use this * information to implement features which require knowledge of what queues * exist on a port, and some basic information about them. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support QoS, as does a null pointer. */ int (*set_queues)(struct ofport *ofport, const struct ofproto_port_queue *queues, size_t n_qdscp); /* If 's' is nonnull, this function registers a "bundle" associated with * client data pointer 'aux' in 'ofproto'. A bundle is the same concept as * a Port in OVSDB, that is, it consists of one or more "member" * devices (Interfaces, in OVSDB) along with VLAN and LACP configuration * and, if there is more than one member, a bonding configuration. If 'aux' * is already registered then this function updates its configuration to * 's'. Otherwise, this function registers a new bundle. * * If 's' is NULL, this function unregisters the bundle registered on * 'ofproto' associated with client data pointer 'aux'. If no such bundle * has been registered, this has no effect. * * This function affects only the behavior of the NXAST_AUTOPATH action and * output to the OFPP_NORMAL port. An implementation that does not support * it at all may set it to NULL or return EOPNOTSUPP. An implementation * that supports only a subset of the functionality should implement what * it can and return 0. */ int (*bundle_set)(struct ofproto *ofproto, void *aux, const struct ofproto_bundle_settings *s); /* If 'port' is part of any bundle, removes it from that bundle. If the * bundle now has no ports, deletes the bundle. If the bundle now has only * one port, deconfigures the bundle's bonding configuration. */ void (*bundle_remove)(struct ofport *ofport); /* If 's' is nonnull, this function registers a mirror associated with * client data pointer 'aux' in 'ofproto'. A mirror is the same concept as * a Mirror in OVSDB. If 'aux' is already registered then this function * updates its configuration to 's'. Otherwise, this function registers a * new mirror. * * If 's' is NULL, this function unregisters the mirror registered on * 'ofproto' associated with client data pointer 'aux'. If no such mirror * has been registered, this has no effect. * * An implementation that does not support mirroring at all may set * it to NULL or return EOPNOTSUPP. An implementation that supports * only a subset of the functionality should implement what it can * and return 0. */ int (*mirror_set)(struct ofproto *ofproto, void *aux, const struct ofproto_mirror_settings *s); /* Retrieves statistics from mirror associated with client data * pointer 'aux' in 'ofproto'. Stores packet and byte counts in * 'packets' and 'bytes', respectively. If a particular counter is * not supported, the appropriate argument is set to UINT64_MAX. * * EOPNOTSUPP as a return value indicates that this ofproto_class does not * support retrieving mirror statistics. */ int (*mirror_get_stats)(struct ofproto *ofproto, void *aux, uint64_t *packets, uint64_t *bytes); /* Configures the VLANs whose bits are set to 1 in 'flood_vlans' as VLANs * on which all packets are flooded, instead of using MAC learning. If * 'flood_vlans' is NULL, then MAC learning applies to all VLANs. * * This function affects only the behavior of the OFPP_NORMAL action. An * implementation that does not support it may set it to NULL or return * EOPNOTSUPP. */ int (*set_flood_vlans)(struct ofproto *ofproto, unsigned long *flood_vlans); /* Returns true if 'aux' is a registered bundle that is currently in use as * the output for a mirror. */ bool (*is_mirror_output_bundle)(const struct ofproto *ofproto, void *aux); /* When the configuration option of forward_bpdu changes, this function * will be invoked. */ void (*forward_bpdu_changed)(struct ofproto *ofproto); /* Sets the MAC aging timeout for the OFPP_NORMAL action to 'idle_time', in * seconds, and the maximum number of MAC table entries to * 'max_entries'. * * An implementation that doesn't support configuring these features may * set this function to NULL or implement it as a no-op. */ void (*set_mac_table_config)(struct ofproto *ofproto, unsigned int idle_time, size_t max_entries); /* Configures multicast snooping on 'ofport' using the settings * defined in 's'. * * If 's' is nonnull, this function updates multicast snooping * configuration to 's' in 'ofproto'. * * If 's' is NULL, this function disables multicast snooping * on 'ofproto'. * * An implementation that does not support multicast snooping may set * it to NULL or return EOPNOTSUPP. */ int (*set_mcast_snooping)(struct ofproto *ofproto, const struct ofproto_mcast_snooping_settings *s); /* Configures multicast snooping port's flood setting on 'ofproto'. * * If 's' is nonnull, this function updates multicast snooping * configuration to 's' in 'ofproto'. * * If 's' is NULL, this function doesn't change anything. * * An implementation that does not support multicast snooping may set * it to NULL or return EOPNOTSUPP. */ int (*set_mcast_snooping_port)(struct ofproto *ofproto_, void *aux, const struct ofproto_mcast_snooping_port_settings *s); /* ## ------------------------ ## */ /* ## OpenFlow meter functions ## */ /* ## ------------------------ ## */ /* These functions should be NULL if an implementation does not support * them. They must be all null or all non-null.. */ /* Initializes 'features' to describe the metering features supported by * 'ofproto'. */ void (*meter_get_features)(const struct ofproto *ofproto, struct ofputil_meter_features *features); /* If '*id' is UINT32_MAX, adds a new meter with the given 'config'. On * success the function must store a provider meter ID other than * UINT32_MAX in '*id'. All further references to the meter will be made * with the returned provider meter id rather than the OpenFlow meter id. * The caller does not try to interpret the provider meter id, giving the * implementation the freedom to either use the OpenFlow meter_id value * provided in the meter configuration, or any other value suitable for the * implementation. * * If '*id' is a value other than UINT32_MAX, modifies the existing meter * with that meter provider ID to have configuration 'config', while * leaving '*id' unchanged. On failure, the existing meter configuration * is left intact. */ enum ofperr (*meter_set)(struct ofproto *ofproto, ofproto_meter_id *id, struct ofputil_meter_config *config); /* Gets the meter and meter band packet and byte counts for maximum of * 'n_bands' bands for the meter with provider ID 'id' within 'ofproto'. * The caller fills in the other stats values. The band stats are copied * to memory at 'stats->bands' provided by the caller. The number of * returned band stats is returned in 'stats->n_bands'. */ enum ofperr (*meter_get)(const struct ofproto *ofproto, ofproto_meter_id id, struct ofputil_meter_stats *stats, uint16_t n_bands); /* Deletes a meter, making the 'ofproto_meter_id' invalid for any * further calls. */ void (*meter_del)(struct ofproto *, ofproto_meter_id); /* ## -------------------- ## */ /* ## OpenFlow 1.1+ groups ## */ /* ## -------------------- ## */ struct ofgroup *(*group_alloc)(void); enum ofperr (*group_construct)(struct ofgroup *); void (*group_destruct)(struct ofgroup *); void (*group_dealloc)(struct ofgroup *); void (*group_modify)(struct ofgroup *); enum ofperr (*group_get_stats)(const struct ofgroup *, struct ofputil_group_stats *); /* ## --------------------- ## */ /* ## Datapath information ## */ /* ## --------------------- ## */ /* Retrieve the version string of the datapath. The version * string can be NULL if it can not be determined. * * The version retuned is read only. The caller should not * free it. * * This function should be NULL if an implementation does not support it. */ const char *(*get_datapath_version)(const struct ofproto *); /* Get capabilities of the datapath type 'dp_type'. */ void (*get_datapath_cap)(const char *dp_type, struct smap *caps); /* Pass custom configuration options to the 'type' datapath. * * This function should be NULL if an implementation does not support it. */ void (*type_set_config)(const char *type, const struct smap *other_config); /* ## ------------------- ## */ /* ## Connection tracking ## */ /* ## ------------------- ## */ /* Flushes the connection tracking tables. If 'zone' is not NULL, * only deletes connections in '*zone'. If 'match' is not NULL, * deletes connections specified by the match. */ void (*ct_flush)(const struct ofproto *, const uint16_t *zone, const struct ofp_ct_match *match); /* Sets conntrack timeout policy specified by 'timeout_policy' to 'zone' * in datapath type 'dp_type'. */ void (*ct_set_zone_timeout_policy)(const char *dp_type, uint16_t zone, struct simap *timeout_policy); /* Deletes the timeout policy associated with 'zone' in datapath type * 'dp_type'. */ void (*ct_del_zone_timeout_policy)(const char *dp_type, uint16_t zone); }; extern const struct ofproto_class ofproto_dpif_class; int ofproto_class_register(const struct ofproto_class *); int ofproto_class_unregister(const struct ofproto_class *); /* Criteria that flow_mod and other operations use for selecting rules on * which to operate. */ struct rule_criteria { /* An OpenFlow table or 255 for all tables. */ uint8_t table_id; /* OpenFlow matching criteria. Interpreted different in "loose" way by * collect_rules_loose() and "strict" way by collect_rules_strict(), as * defined in the OpenFlow spec. */ struct cls_rule cr; ovs_version_t version; /* Matching criteria for the OpenFlow cookie. Consider a bit B in a rule's * cookie and the corresponding bits C in 'cookie' and M in 'cookie_mask'. * The rule will not be selected if M is 1 and B != C. */ ovs_be64 cookie; ovs_be64 cookie_mask; /* Selection based on actions within a rule: * * If out_port != OFPP_ANY, selects only rules that output to out_port. * If out_group != OFPG_ALL, select only rules that output to out_group. */ ofp_port_t out_port; uint32_t out_group; /* If true, collects only rules that are modifiable. */ bool include_hidden; bool include_readonly; }; /* flow_mod with execution context. */ struct ofproto_flow_mod { /* Allocated by 'init' phase, may be freed after 'start' phase, as these * are not needed for 'revert' nor 'finish'. * * This structure owns a reference to 'temp_rule' (if it is nonnull) that * must be eventually be released with ofproto_rule_unref(). */ struct rule *temp_rule; struct rule_criteria criteria; struct cls_conjunction *conjs; size_t n_conjs; /* Replicate needed fields from ofputil_flow_mod to not need it after the * flow has been created. */ uint16_t command; bool modify_cookie; /* Fields derived from ofputil_flow_mod. */ bool modify_may_add_flow; bool modify_keep_counts; enum nx_flow_update_event event; uint8_t table_id; /* These are only used during commit execution. * ofproto_flow_mod_uninit() does NOT clean these up. */ ovs_version_t version; /* Version in which changes take * effect. */ bool learn_adds_rule; /* Learn execution adds a rule. */ struct rule_collection old_rules; /* Affected rules. */ struct rule_collection new_rules; /* Replacement rules. */ }; void ofproto_flow_mod_uninit(struct ofproto_flow_mod *); /* port_mod with execution context. */ struct ofproto_port_mod { struct ofputil_port_mod pm; struct ofport *port; /* Affected port. */ }; /* flow_mod with execution context. */ struct ofproto_group_mod { struct ofputil_group_mod gm; ovs_version_t version; /* Version in which changes take * effect. */ struct ofgroup *new_group; /* New group. */ struct group_collection old_groups; /* Affected groups. */ }; /* packet_out with execution context. */ struct ofproto_packet_out { ovs_version_t version; struct dp_packet *packet; struct flow *flow; struct ofpact *ofpacts; size_t ofpacts_len; void *aux; /* Provider private. */ }; void ofproto_packet_out_uninit(struct ofproto_packet_out *); enum ofperr ofproto_flow_mod(struct ofproto *, const struct ofputil_flow_mod *) OVS_EXCLUDED(ofproto_mutex); enum ofperr ofproto_flow_mod_init_for_learn(struct ofproto *, const struct ofputil_flow_mod *, struct ofproto_flow_mod *) OVS_EXCLUDED(ofproto_mutex); enum ofperr ofproto_flow_mod_learn(struct ofproto_flow_mod *, bool keep_ref, unsigned limit, bool *below_limit) OVS_EXCLUDED(ofproto_mutex); enum ofperr ofproto_flow_mod_learn_refresh(struct ofproto_flow_mod *ofm); enum ofperr ofproto_flow_mod_learn_start(struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex); void ofproto_flow_mod_learn_revert(struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex); enum ofperr ofproto_flow_mod_learn_finish(struct ofproto_flow_mod *ofm, struct ofproto *orig_ofproto) OVS_REQUIRES(ofproto_mutex); void ofproto_add_flow(struct ofproto *, const struct match *, int priority, const struct ofpact *ofpacts, size_t ofpacts_len) OVS_EXCLUDED(ofproto_mutex); void ofproto_delete_flow(struct ofproto *, const struct match *, int priority) OVS_REQUIRES(ofproto_mutex); void ofproto_flush_flows(struct ofproto *); enum ofperr ofproto_check_ofpacts(struct ofproto *, const struct ofpact ofpacts[], size_t ofpacts_len) OVS_REQUIRES(ofproto_mutex); static inline const struct rule_actions * rule_get_actions(const struct rule *rule) { return rule->actions; } /* Returns true if 'rule' is an OpenFlow 1.3 "table-miss" rule, false * otherwise. * * ("Table-miss" rules are special because a packet_in generated through one * uses OFPR_NO_MATCH as its reason, whereas packet_ins generated by any other * rule use OFPR_ACTION.) */ static inline bool rule_is_table_miss(const struct rule *rule) { return rule->cr.priority == 0 && cls_rule_is_catchall(&rule->cr); } /* Returns true if 'rule' should be hidden from the controller. * * Rules with priority higher than UINT16_MAX are set up by ofproto itself * (e.g. by in-band control) and are intentionally hidden from the * controller. */ static inline bool rule_is_hidden(const struct rule *rule) { return rule->cr.priority > UINT16_MAX; } static inline struct rule * rule_from_cls_rule(const struct cls_rule *cls_rule) { return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL; } static inline const struct tun_table * ofproto_get_tun_tab(const struct ofproto *ofproto) { return ovsrcu_get(struct tun_table *, &ofproto->metadata_tab); } #endif /* ofproto/ofproto-provider.h */