/* * Copyright (c) 2009-2017 Nicira, Inc. * Copyright (c) 2010 Jean Tourrilhes - HP-Labs. * * 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. */ #include #include #include #include #include #include #include "bitmap.h" #include "bundles.h" #include "byte-order.h" #include "classifier.h" #include "connectivity.h" #include "connmgr.h" #include "coverage.h" #include "dp-packet.h" #include "hash.h" #include "openvswitch/hmap.h" #include "netdev.h" #include "nx-match.h" #include "ofproto.h" #include "ofproto-provider.h" #include "openflow/nicira-ext.h" #include "openflow/openflow.h" #include "openvswitch/dynamic-string.h" #include "openvswitch/meta-flow.h" #include "openvswitch/ofp-actions.h" #include "openvswitch/ofp-bundle.h" #include "openvswitch/ofp-ct.h" #include "openvswitch/ofp-errors.h" #include "openvswitch/ofp-match.h" #include "openvswitch/ofp-msgs.h" #include "openvswitch/ofp-monitor.h" #include "openvswitch/ofp-print.h" #include "openvswitch/ofp-queue.h" #include "openvswitch/ofp-util.h" #include "openvswitch/ofpbuf.h" #include "openvswitch/vlog.h" #include "ovs-rcu.h" #include "packets.h" #include "pinsched.h" #include "openvswitch/poll-loop.h" #include "random.h" #include "seq.h" #include "openvswitch/shash.h" #include "simap.h" #include "smap.h" #include "sset.h" #include "timeval.h" #include "tun-metadata.h" #include "unaligned.h" #include "unixctl.h" #include "util.h" VLOG_DEFINE_THIS_MODULE(ofproto); COVERAGE_DEFINE(ofproto_flush); COVERAGE_DEFINE(ofproto_packet_out); COVERAGE_DEFINE(ofproto_queue_req); COVERAGE_DEFINE(ofproto_recv_openflow); COVERAGE_DEFINE(ofproto_reinit_ports); COVERAGE_DEFINE(ofproto_update_port); /* Default fields to use for prefix tries in each flow table, unless something * else is configured. */ const enum mf_field_id default_prefix_fields[2] = { MFF_IPV4_DST, MFF_IPV4_SRC }; /* oftable. */ static void oftable_init(struct oftable *); static void oftable_destroy(struct oftable *); static void oftable_set_name(struct oftable *, const char *name, int level); static bool oftable_may_set_name(const struct oftable *, const char *name, int level); static enum ofperr evict_rules_from_table(struct oftable *) OVS_REQUIRES(ofproto_mutex); static void oftable_configure_eviction(struct oftable *, unsigned int eviction, const struct mf_subfield *fields, size_t n_fields) OVS_REQUIRES(ofproto_mutex); /* This is the only combination of OpenFlow eviction flags that OVS supports: a * combination of OF1.4+ importance, the remaining lifetime of the flow, and * fairness based on user-specified fields. */ #define OFPROTO_EVICTION_FLAGS \ (OFPTMPEF14_OTHER | OFPTMPEF14_IMPORTANCE | OFPTMPEF14_LIFETIME) /* A set of rules within a single OpenFlow table (oftable) that have the same * values for the oftable's eviction_fields. A rule to be evicted, when one is * needed, is taken from the eviction group that contains the greatest number * of rules. * * An oftable owns any number of eviction groups, each of which contains any * number of rules. * * Membership in an eviction group is imprecise, based on the hash of the * oftable's eviction_fields (in the eviction_group's id_node.hash member). * That is, if two rules have different eviction_fields, but those * eviction_fields hash to the same value, then they will belong to the same * eviction_group anyway. * * (When eviction is not enabled on an oftable, we don't track any eviction * groups, to save time and space.) */ struct eviction_group { struct hmap_node id_node; /* In oftable's "eviction_groups_by_id". */ struct heap_node size_node; /* In oftable's "eviction_groups_by_size". */ struct heap rules; /* Contains "struct rule"s. */ }; static bool choose_rule_to_evict(struct oftable *table, struct rule **rulep) OVS_REQUIRES(ofproto_mutex); static uint64_t rule_eviction_priority(struct ofproto *ofproto, struct rule *) OVS_REQUIRES(ofproto_mutex); static void eviction_group_add_rule(struct rule *) OVS_REQUIRES(ofproto_mutex); static void eviction_group_remove_rule(struct rule *) OVS_REQUIRES(ofproto_mutex); static void rule_criteria_init(struct rule_criteria *, uint8_t table_id, const struct minimatch *match, int priority, ovs_version_t version, ovs_be64 cookie, ovs_be64 cookie_mask, ofp_port_t out_port, uint32_t out_group); static void rule_criteria_require_rw(struct rule_criteria *, bool can_write_readonly); static void rule_criteria_destroy(struct rule_criteria *); static enum ofperr collect_rules_loose(struct ofproto *, const struct rule_criteria *, struct rule_collection *); struct learned_cookie { union { /* In struct ofproto's 'learned_cookies' hmap. */ struct hmap_node hmap_node OVS_GUARDED_BY(ofproto_mutex); /* In 'dead_cookies' list when removed from hmap. */ struct ovs_list list_node; }; /* Key. */ ovs_be64 cookie OVS_GUARDED_BY(ofproto_mutex); uint8_t table_id OVS_GUARDED_BY(ofproto_mutex); /* Number of references from "learn" actions. * * When this drops to 0, all of the flows in 'table_id' with the specified * 'cookie' are deleted. */ int n OVS_GUARDED_BY(ofproto_mutex); }; static const struct ofpact_learn *next_learn_with_delete( const struct rule_actions *, const struct ofpact_learn *start); static void learned_cookies_inc(struct ofproto *, const struct rule_actions *) OVS_REQUIRES(ofproto_mutex); static void learned_cookies_dec(struct ofproto *, const struct rule_actions *, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex); static void learned_cookies_flush(struct ofproto *, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex); /* ofport. */ static void ofport_destroy__(struct ofport *) OVS_EXCLUDED(ofproto_mutex); static void ofport_destroy(struct ofport *, bool del); static bool ofport_is_mtu_overridden(const struct ofproto *, const struct ofport *); static int update_port(struct ofproto *, const char *devname); static int init_ports(struct ofproto *); static void reinit_ports(struct ofproto *); static long long int ofport_get_usage(const struct ofproto *, ofp_port_t ofp_port); static void ofport_set_usage(struct ofproto *, ofp_port_t ofp_port, long long int last_used); static void ofport_remove_usage(struct ofproto *, ofp_port_t ofp_port); /* Ofport usage. * * Keeps track of the currently used and recently used ofport values and is * used to prevent immediate recycling of ofport values. */ struct ofport_usage { struct hmap_node hmap_node; /* In struct ofproto's "ofport_usage" hmap. */ ofp_port_t ofp_port; /* OpenFlow port number. */ long long int last_used; /* Last time the 'ofp_port' was used. LLONG_MAX represents in-use ofports. */ }; /* rule. */ static void ofproto_rule_send_removed(struct rule *) OVS_EXCLUDED(ofproto_mutex); static bool rule_is_readonly(const struct rule *); static void ofproto_rule_insert__(struct ofproto *, struct rule *) OVS_REQUIRES(ofproto_mutex); static void ofproto_rule_remove__(struct ofproto *, struct rule *) OVS_REQUIRES(ofproto_mutex); static void remove_rules_postponed(struct rule_collection *) OVS_REQUIRES(ofproto_mutex); /* The source of an OpenFlow request. * * A table modification request can be generated externally, via OpenFlow, or * internally through a function call. This structure indicates the source of * an OpenFlow-generated table modification. For an internal flow_mod, it * isn't meaningful and thus supplied as NULL. */ struct openflow_mod_requester { struct ofconn *ofconn; /* Connection on which flow_mod arrived. */ const struct ofp_header *request; }; /* OpenFlow. */ static enum ofperr ofproto_rule_create(struct ofproto *, struct cls_rule *, uint8_t table_id, ovs_be64 new_cookie, uint16_t idle_timeout, uint16_t hard_timeout, enum ofputil_flow_mod_flags flags, uint16_t importance, const struct ofpact *ofpacts, size_t ofpacts_len, uint64_t match_tlv_bitmap, uint64_t ofpacts_tlv_bitmap, struct rule **new_rule) OVS_NO_THREAD_SAFETY_ANALYSIS; static void replace_rule_start(struct ofproto *, struct ofproto_flow_mod *, struct rule *old_rule, struct rule *new_rule) OVS_REQUIRES(ofproto_mutex); static void replace_rule_revert(struct ofproto *, struct rule *old_rule, struct rule *new_rule) OVS_REQUIRES(ofproto_mutex); static enum ofperr replace_rule_finish(struct ofproto *, struct ofproto_flow_mod *, const struct openflow_mod_requester *, struct rule *old_rule, struct rule *new_rule, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex); static void delete_flows__(struct rule_collection *, enum ofp_flow_removed_reason, const struct openflow_mod_requester *) OVS_REQUIRES(ofproto_mutex); static void ofproto_group_delete_all__(struct ofproto *) OVS_REQUIRES(ofproto_mutex); static bool ofproto_group_exists(const struct ofproto *, uint32_t group_id); static void handle_openflow(struct ofconn *, const struct ovs_list *msgs); static enum ofperr ofproto_flow_mod_init(struct ofproto *, struct ofproto_flow_mod *, const struct ofputil_flow_mod *fm, struct rule *) OVS_EXCLUDED(ofproto_mutex); static enum ofperr ofproto_flow_mod_start(struct ofproto *, struct ofproto_flow_mod *) OVS_REQUIRES(ofproto_mutex); static void ofproto_flow_mod_revert(struct ofproto *, struct ofproto_flow_mod *) OVS_REQUIRES(ofproto_mutex); static enum ofperr ofproto_flow_mod_finish(struct ofproto *, struct ofproto_flow_mod *, const struct openflow_mod_requester *) OVS_REQUIRES(ofproto_mutex); static enum ofperr handle_flow_mod__(struct ofproto *, const struct ofputil_flow_mod *, const struct openflow_mod_requester *) OVS_EXCLUDED(ofproto_mutex); static void calc_duration(long long int start, long long int now, uint32_t *sec, uint32_t *nsec); /* ofproto. */ static uint64_t pick_datapath_id(const struct ofproto *); static uint64_t pick_fallback_dpid(void); static void ofproto_destroy__(struct ofproto *); static void update_mtu(struct ofproto *, struct ofport *); static void update_mtu_ofproto(struct ofproto *); static void meter_delete(struct ofproto *, uint32_t); static void meter_delete_all(struct ofproto *); static void meter_insert_rule(struct rule *); /* unixctl. */ static void ofproto_unixctl_init(void); /* All registered ofproto classes, in probe order. */ static const struct ofproto_class **ofproto_classes; static size_t n_ofproto_classes; static size_t allocated_ofproto_classes; /* Global lock that protects all flow table operations. */ struct ovs_mutex ofproto_mutex = OVS_MUTEX_INITIALIZER; unsigned ofproto_flow_limit = OFPROTO_FLOW_LIMIT_DEFAULT; unsigned ofproto_max_idle = OFPROTO_MAX_IDLE_DEFAULT; unsigned ofproto_max_revalidator = OFPROTO_MAX_REVALIDATOR_DEFAULT; unsigned ofproto_min_revalidate_pps = OFPROTO_MIN_REVALIDATE_PPS_DEFAULT; uint32_t n_handlers, n_revalidators; /* Map from datapath name to struct ofproto, for use by unixctl commands. */ static struct hmap all_ofprotos = HMAP_INITIALIZER(&all_ofprotos); /* Initial mappings of port to OpenFlow number mappings. */ static struct shash init_ofp_ports = SHASH_INITIALIZER(&init_ofp_ports); static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); /* The default value of true waits for flow restore. */ static bool flow_restore_wait = true; /* Must be called to initialize the ofproto library. * * The caller may pass in 'iface_hints', which contains an shash of * "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 will make copies of anything required. An ofproto provider * will remove any existing state that is not described by the hint, and * may choose to remove it all. */ void ofproto_init(const struct shash *iface_hints) { struct shash_node *node; size_t i; ofproto_class_register(&ofproto_dpif_class); /* Make a local copy, since we don't own 'iface_hints' elements. */ SHASH_FOR_EACH(node, iface_hints) { const struct iface_hint *orig_hint = node->data; struct iface_hint *new_hint = xmalloc(sizeof *new_hint); const char *br_type = ofproto_normalize_type(orig_hint->br_type); new_hint->br_name = xstrdup(orig_hint->br_name); new_hint->br_type = xstrdup(br_type); new_hint->ofp_port = orig_hint->ofp_port; shash_add(&init_ofp_ports, node->name, new_hint); } for (i = 0; i < n_ofproto_classes; i++) { ofproto_classes[i]->init(&init_ofp_ports); } ofproto_unixctl_init(); } /* 'type' should be a normalized datapath type, as returned by * ofproto_normalize_type(). Returns the corresponding ofproto_class * structure, or a null pointer if there is none registered for 'type'. */ static const struct ofproto_class * ofproto_class_find__(const char *type) { size_t i; for (i = 0; i < n_ofproto_classes; i++) { const struct ofproto_class *class = ofproto_classes[i]; struct sset types; bool found; sset_init(&types); class->enumerate_types(&types); found = sset_contains(&types, type); sset_destroy(&types); if (found) { return class; } } VLOG_WARN("unknown datapath type %s", type); return NULL; } /* Registers a new ofproto class. After successful registration, new ofprotos * of that type can be created using ofproto_create(). */ int ofproto_class_register(const struct ofproto_class *new_class) { size_t i; for (i = 0; i < n_ofproto_classes; i++) { if (ofproto_classes[i] == new_class) { return EEXIST; } } if (n_ofproto_classes >= allocated_ofproto_classes) { ofproto_classes = x2nrealloc(ofproto_classes, &allocated_ofproto_classes, sizeof *ofproto_classes); } ofproto_classes[n_ofproto_classes++] = new_class; return 0; } /* Unregisters a datapath provider. 'type' must have been previously * registered and not currently be in use by any ofprotos. After * unregistration new datapaths of that type cannot be opened using * ofproto_create(). */ int ofproto_class_unregister(const struct ofproto_class *class) { size_t i; for (i = 0; i < n_ofproto_classes; i++) { if (ofproto_classes[i] == class) { for (i++; i < n_ofproto_classes; i++) { ofproto_classes[i - 1] = ofproto_classes[i]; } n_ofproto_classes--; return 0; } } VLOG_WARN("attempted to unregister an ofproto class that is not " "registered"); return EAFNOSUPPORT; } /* Clears 'types' and enumerates all registered ofproto types into it. The * caller must first initialize the sset. */ void ofproto_enumerate_types(struct sset *types) { size_t i; sset_clear(types); for (i = 0; i < n_ofproto_classes; i++) { ofproto_classes[i]->enumerate_types(types); } } /* Returns the fully spelled out name for the given ofproto 'type'. * * Normalized type string can be compared with strcmp(). Unnormalized type * string might be the same even if they have different spellings. */ const char * ofproto_normalize_type(const char *type) { return type && type[0] ? type : "system"; } /* Clears 'names' and enumerates the names of all known created ofprotos with * the given 'type'. The caller must first initialize the sset. Returns 0 if * successful, otherwise a positive errno value. * * Some kinds of datapaths might not be practically enumerable. This is not * considered an error. */ int ofproto_enumerate_names(const char *type, struct sset *names) { const struct ofproto_class *class = ofproto_class_find__(type); return class ? class->enumerate_names(type, names) : EAFNOSUPPORT; } static void ofproto_bump_tables_version(struct ofproto *ofproto) { ++ofproto->tables_version; ofproto->ofproto_class->set_tables_version(ofproto, ofproto->tables_version); } int ofproto_create(const char *datapath_name, const char *datapath_type, struct ofproto **ofprotop) OVS_EXCLUDED(ofproto_mutex) { const struct ofproto_class *class; struct ofproto *ofproto; int error; int i; *ofprotop = NULL; datapath_type = ofproto_normalize_type(datapath_type); class = ofproto_class_find__(datapath_type); if (!class) { VLOG_WARN("could not create datapath %s of unknown type %s", datapath_name, datapath_type); return EAFNOSUPPORT; } ofproto = class->alloc(); if (!ofproto) { VLOG_ERR("failed to allocate datapath %s of type %s", datapath_name, datapath_type); return ENOMEM; } /* Initialize. */ ovs_mutex_lock(&ofproto_mutex); memset(ofproto, 0, sizeof *ofproto); ofproto->ofproto_class = class; ofproto->name = xstrdup(datapath_name); ofproto->type = xstrdup(datapath_type); hmap_insert(&all_ofprotos, &ofproto->hmap_node, hash_string(ofproto->name, 0)); ofproto->datapath_id = 0; ofproto->forward_bpdu = false; ofproto->fallback_dpid = pick_fallback_dpid(); ofproto->mfr_desc = NULL; ofproto->hw_desc = NULL; ofproto->sw_desc = NULL; ofproto->serial_desc = NULL; ofproto->dp_desc = NULL; ofproto->frag_handling = OFPUTIL_FRAG_NORMAL; hmap_init(&ofproto->ports); hmap_init(&ofproto->ofport_usage); shash_init(&ofproto->port_by_name); simap_init(&ofproto->ofp_requests); ofproto->max_ports = ofp_to_u16(OFPP_MAX); ofproto->eviction_group_timer = LLONG_MIN; ofproto->tables = NULL; ofproto->n_tables = 0; ofproto->tables_version = OVS_VERSION_MIN; hindex_init(&ofproto->cookies); hmap_init(&ofproto->learned_cookies); ovs_list_init(&ofproto->expirable); ofproto->to_remove = xzalloc(sizeof *ofproto->to_remove); rule_collection_init(ofproto->to_remove); ofproto->connmgr = connmgr_create(ofproto, datapath_name, datapath_name); ofproto->min_mtu = INT_MAX; cmap_init(&ofproto->groups); ovs_mutex_unlock(&ofproto_mutex); ofproto->ogf.types = 0xf; ofproto->ogf.capabilities = OFPGFC_CHAINING | OFPGFC_SELECT_LIVENESS | OFPGFC_SELECT_WEIGHT; for (i = 0; i < 4; i++) { ofproto->ogf.max_groups[i] = OFPG_MAX; ofproto->ogf.ofpacts[i] = (UINT64_C(1) << N_OFPACTS) - 1; } ovsrcu_set(&ofproto->metadata_tab, tun_metadata_alloc(NULL)); ovs_mutex_init(&ofproto->vl_mff_map.mutex); cmap_init(&ofproto->vl_mff_map.cmap); ovs_refcount_init(&ofproto->refcount); error = ofproto->ofproto_class->construct(ofproto); if (error) { VLOG_ERR("failed to open datapath %s: %s", datapath_name, ovs_strerror(error)); ovs_mutex_lock(&ofproto_mutex); connmgr_destroy(ofproto->connmgr); ofproto->connmgr = NULL; ovs_mutex_unlock(&ofproto_mutex); ofproto_destroy__(ofproto); return error; } /* Check that hidden tables, if any, are at the end. */ ovs_assert(ofproto->n_tables); for (i = 0; i + 1 < ofproto->n_tables; i++) { enum oftable_flags flags = ofproto->tables[i].flags; enum oftable_flags next_flags = ofproto->tables[i + 1].flags; ovs_assert(!(flags & OFTABLE_HIDDEN) || next_flags & OFTABLE_HIDDEN); } ofproto->datapath_id = pick_datapath_id(ofproto); init_ports(ofproto); /* Initialize meters table. */ if (ofproto->ofproto_class->meter_get_features) { ofproto->ofproto_class->meter_get_features(ofproto, &ofproto->meter_features); } else { memset(&ofproto->meter_features, 0, sizeof ofproto->meter_features); } hmap_init(&ofproto->meters); ofproto->slowpath_meter_id = UINT32_MAX; ofproto->controller_meter_id = UINT32_MAX; /* Set the initial tables version. */ ofproto_bump_tables_version(ofproto); *ofprotop = ofproto; return 0; } /* Must be called (only) by an ofproto implementation in its constructor * function. See the large comment on 'construct' in struct ofproto_class for * details. */ void ofproto_init_tables(struct ofproto *ofproto, int n_tables) { struct oftable *table; ovs_assert(!ofproto->n_tables); ovs_assert(n_tables >= 1 && n_tables <= 255); ofproto->n_tables = n_tables; ofproto->tables = xmalloc(n_tables * sizeof *ofproto->tables); OFPROTO_FOR_EACH_TABLE (table, ofproto) { oftable_init(table); } } /* To be optionally called (only) by an ofproto implementation in its * constructor function. See the large comment on 'construct' in struct * ofproto_class for details. * * Sets the maximum number of ports to 'max_ports'. The ofproto generic layer * will then ensure that actions passed into the ofproto implementation will * not refer to OpenFlow ports numbered 'max_ports' or higher. If this * function is not called, there will be no such restriction. * * Reserved ports numbered OFPP_MAX and higher are special and not subject to * the 'max_ports' restriction. */ void ofproto_init_max_ports(struct ofproto *ofproto, uint16_t max_ports) { ovs_assert(max_ports <= ofp_to_u16(OFPP_MAX)); ofproto->max_ports = max_ports; } uint64_t ofproto_get_datapath_id(const struct ofproto *ofproto) { return ofproto->datapath_id; } void ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id) { uint64_t old_dpid = p->datapath_id; p->datapath_id = datapath_id ? datapath_id : pick_datapath_id(p); if (p->datapath_id != old_dpid) { /* Force all active connections to reconnect, since there is no way to * notify a controller that the datapath ID has changed. */ ofproto_reconnect_controllers(p); } } void ofproto_set_controllers(struct ofproto *p, struct shash *controllers) { connmgr_set_controllers(p->connmgr, controllers); } void ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode) { connmgr_set_fail_mode(p->connmgr, fail_mode); } /* Drops the connections between 'ofproto' and all of its controllers, forcing * them to reconnect. */ void ofproto_reconnect_controllers(struct ofproto *ofproto) { connmgr_reconnect(ofproto->connmgr); } /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s * in-band control should guarantee access, in the same way that in-band * control guarantees access to OpenFlow controllers. */ void ofproto_set_extra_in_band_remotes(struct ofproto *ofproto, const struct sockaddr_in *extras, size_t n) { connmgr_set_extra_in_band_remotes(ofproto->connmgr, extras, n); } /* Sets the OpenFlow queue used by flows set up by in-band control on * 'ofproto' to 'queue_id'. If 'queue_id' is negative, then in-band control * flows will use the default queue. */ void ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id) { connmgr_set_in_band_queue(ofproto->connmgr, queue_id); } /* Sets the bundle max idle timeout */ void ofproto_set_bundle_idle_timeout(unsigned timeout) { connmgr_set_bundle_idle_timeout(timeout); } /* Sets the number of flows at which eviction from the kernel flow table * will occur. */ void ofproto_set_flow_limit(unsigned limit) { ofproto_flow_limit = limit; } /* Sets the maximum idle time for flows in the datapath before they are * expired. */ void ofproto_set_max_idle(unsigned max_idle) { ofproto_max_idle = max_idle; } /* Sets the maximum allowed revalidator timeout. */ void ofproto_set_max_revalidator(unsigned max_revalidator) { if (max_revalidator >= 100) { ofproto_max_revalidator = max_revalidator; } } /* Set minimum pps that flow must have in order to be revalidated when * revalidation duration exceeds half of max-revalidator config variable. */ void ofproto_set_min_revalidate_pps(unsigned min_revalidate_pps) { ofproto_min_revalidate_pps = min_revalidate_pps; } /* If forward_bpdu is true, the NORMAL action will forward frames with * reserved (e.g. STP) destination Ethernet addresses. if forward_bpdu is false, * the NORMAL action will drop these frames. */ void ofproto_set_forward_bpdu(struct ofproto *ofproto, bool forward_bpdu) { bool old_val = ofproto->forward_bpdu; ofproto->forward_bpdu = forward_bpdu; if (old_val != ofproto->forward_bpdu) { if (ofproto->ofproto_class->forward_bpdu_changed) { ofproto->ofproto_class->forward_bpdu_changed(ofproto); } } } /* Sets the MAC aging timeout for the OFPP_NORMAL action on 'ofproto' to * 'idle_time', in seconds, and the maximum number of MAC table entries to * 'max_entries'. */ void ofproto_set_mac_table_config(struct ofproto *ofproto, unsigned idle_time, size_t max_entries) { if (ofproto->ofproto_class->set_mac_table_config) { ofproto->ofproto_class->set_mac_table_config(ofproto, idle_time, max_entries); } } /* Multicast snooping configuration. */ /* Configures multicast snooping on 'ofproto' using the settings * defined in 's'. If 's' is NULL, disables multicast snooping. * * Returns 0 if successful, otherwise a positive errno value. */ int ofproto_set_mcast_snooping(struct ofproto *ofproto, const struct ofproto_mcast_snooping_settings *s) { return (ofproto->ofproto_class->set_mcast_snooping ? ofproto->ofproto_class->set_mcast_snooping(ofproto, s) : EOPNOTSUPP); } /* Configures multicast snooping flood settings on 'ofp_port' of 'ofproto'. * * Returns 0 if successful, otherwise a positive errno value.*/ int ofproto_port_set_mcast_snooping(struct ofproto *ofproto, void *aux, const struct ofproto_mcast_snooping_port_settings *s) { return (ofproto->ofproto_class->set_mcast_snooping_port ? ofproto->ofproto_class->set_mcast_snooping_port(ofproto, aux, s) : EOPNOTSUPP); } void ofproto_type_set_config(const char *datapath_type, const struct smap *cfg) { const struct ofproto_class *class; datapath_type = ofproto_normalize_type(datapath_type); class = ofproto_class_find__(datapath_type); if (class->type_set_config) { class->type_set_config(datapath_type, cfg); } } void ofproto_set_threads(int n_handlers_, int n_revalidators_) { n_revalidators = MAX(n_revalidators_, 0); n_handlers = MAX(n_handlers_, 0); } void ofproto_set_dp_desc(struct ofproto *p, const char *dp_desc) { free(p->dp_desc); p->dp_desc = nullable_xstrdup(dp_desc); } void ofproto_set_serial_desc(struct ofproto *p, const char *serial_desc) { free(p->serial_desc); p->serial_desc = nullable_xstrdup(serial_desc); } int ofproto_set_snoops(struct ofproto *ofproto, const struct sset *snoops) { return connmgr_set_snoops(ofproto->connmgr, snoops); } int ofproto_set_netflow(struct ofproto *ofproto, const struct netflow_options *nf_options) { if (nf_options && sset_is_empty(&nf_options->collectors)) { nf_options = NULL; } if (ofproto->ofproto_class->set_netflow) { return ofproto->ofproto_class->set_netflow(ofproto, nf_options); } else { return nf_options ? EOPNOTSUPP : 0; } } int ofproto_set_sflow(struct ofproto *ofproto, const struct ofproto_sflow_options *oso) { if (oso && sset_is_empty(&oso->targets)) { oso = NULL; } if (ofproto->ofproto_class->set_sflow) { return ofproto->ofproto_class->set_sflow(ofproto, oso); } else { return oso ? EOPNOTSUPP : 0; } } int ofproto_set_ipfix(struct ofproto *ofproto, const struct ofproto_ipfix_bridge_exporter_options *bo, const struct ofproto_ipfix_flow_exporter_options *fo, size_t n_fo) { if (ofproto->ofproto_class->set_ipfix) { return ofproto->ofproto_class->set_ipfix(ofproto, bo, fo, n_fo); } else { return (bo || fo) ? EOPNOTSUPP : 0; } } static int ofproto_get_ipfix_stats(struct ofproto *ofproto, bool bridge_ipfix, struct ovs_list *replies) { int error; if (ofproto->ofproto_class->get_ipfix_stats) { error = ofproto->ofproto_class->get_ipfix_stats(ofproto, bridge_ipfix, replies); } else { error = EOPNOTSUPP; } return error; } static enum ofperr handle_ipfix_bridge_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ovs_list replies; enum ofperr error; ofpmp_init(&replies, request); error = ofproto_get_ipfix_stats(ofproto, true, &replies); if (!error) { ofconn_send_replies(ofconn, &replies); } else { ofpbuf_list_delete(&replies); } return error; } static enum ofperr handle_ipfix_flow_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ovs_list replies; enum ofperr error; ofpmp_init(&replies, request); error = ofproto_get_ipfix_stats(ofproto, false, &replies); if (!error) { ofconn_send_replies(ofconn, &replies); } else { ofpbuf_list_delete(&replies); } return error; } static enum ofperr handle_nxt_ct_flush_zone(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); const struct nx_zone_id *nzi = ofpmsg_body(oh); if (!is_all_zeros(nzi->zero, sizeof nzi->zero)) { return OFPERR_NXBRC_MUST_BE_ZERO; } uint16_t zone = ntohs(nzi->zone_id); if (ofproto->ofproto_class->ct_flush) { ofproto->ofproto_class->ct_flush(ofproto, &zone, NULL); } else { return EOPNOTSUPP; } return 0; } static enum ofperr handle_nxt_ct_flush(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofp_ct_match match = {0}; bool with_zone = false; uint16_t zone_id = 0; enum ofperr error = ofp_ct_match_decode(&match, &with_zone, &zone_id, oh); if (error) { return error; } if (ofproto->ofproto_class->ct_flush) { ofproto->ofproto_class->ct_flush(ofproto, with_zone ? &zone_id : NULL, &match); } else { return EOPNOTSUPP; } return 0; } void ofproto_set_flow_restore_wait(bool flow_restore_wait_db) { flow_restore_wait = flow_restore_wait_db; } bool ofproto_get_flow_restore_wait(void) { return flow_restore_wait; } /* Retrieve datapath capabilities. */ void ofproto_get_datapath_cap(const char *datapath_type, struct smap *dp_cap) { datapath_type = ofproto_normalize_type(datapath_type); const struct ofproto_class *class = ofproto_class_find__(datapath_type); if (class && class->get_datapath_cap) { class->get_datapath_cap(datapath_type, dp_cap); } } /* Connection tracking configuration. */ void ofproto_ct_set_zone_timeout_policy(const char *datapath_type, uint16_t zone_id, struct simap *timeout_policy) { datapath_type = ofproto_normalize_type(datapath_type); const struct ofproto_class *class = ofproto_class_find__(datapath_type); if (class && class->ct_set_zone_timeout_policy) { class->ct_set_zone_timeout_policy(datapath_type, zone_id, timeout_policy); } } void ofproto_ct_del_zone_timeout_policy(const char *datapath_type, uint16_t zone_id) { datapath_type = ofproto_normalize_type(datapath_type); const struct ofproto_class *class = ofproto_class_find__(datapath_type); if (class && class->ct_del_zone_timeout_policy) { class->ct_del_zone_timeout_policy(datapath_type, zone_id); } } /* Spanning Tree Protocol (STP) configuration. */ /* Configures STP on 'ofproto' using the settings defined in 's'. If * 's' is NULL, disables STP. * * Returns 0 if successful, otherwise a positive errno value. */ int ofproto_set_stp(struct ofproto *ofproto, const struct ofproto_stp_settings *s) { return (ofproto->ofproto_class->set_stp ? ofproto->ofproto_class->set_stp(ofproto, s) : EOPNOTSUPP); } /* Retrieves STP status of 'ofproto' and stores it in 's'. If the * 'enabled' member of 's' is false, then the other members are not * meaningful. * * Returns 0 if successful, otherwise a positive errno value. */ int ofproto_get_stp_status(struct ofproto *ofproto, struct ofproto_stp_status *s) { return (ofproto->ofproto_class->get_stp_status ? ofproto->ofproto_class->get_stp_status(ofproto, s) : EOPNOTSUPP); } /* Configures STP on 'ofp_port' of 'ofproto' using the settings defined * in 's'. 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 the 's' is NULL, then STP * is disabled on the port. * * Returns 0 if successful, otherwise a positive errno value.*/ int ofproto_port_set_stp(struct ofproto *ofproto, ofp_port_t ofp_port, const struct ofproto_port_stp_settings *s) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot configure STP on nonexistent port %"PRIu32, ofproto->name, ofp_port); return ENODEV; } return (ofproto->ofproto_class->set_stp_port ? ofproto->ofproto_class->set_stp_port(ofport, s) : EOPNOTSUPP); } /* Retrieves STP port status of 'ofp_port' on 'ofproto' and stores it in * 's'. If the 'enabled' member in 's' is false, then the other members * are not meaningful. * * Returns 0 if successful, otherwise a positive errno value.*/ int ofproto_port_get_stp_status(struct ofproto *ofproto, ofp_port_t ofp_port, struct ofproto_port_stp_status *s) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN_RL(&rl, "%s: cannot get STP status on nonexistent " "port %"PRIu32, ofproto->name, ofp_port); return ENODEV; } return (ofproto->ofproto_class->get_stp_port_status ? ofproto->ofproto_class->get_stp_port_status(ofport, s) : EOPNOTSUPP); } /* Retrieves STP port statistics of 'ofp_port' on 'ofproto' and stores it in * 's'. If the 'enabled' member in 's' is false, then the other members * are not meaningful. * * Returns 0 if successful, otherwise a positive errno value.*/ int ofproto_port_get_stp_stats(struct ofproto *ofproto, ofp_port_t ofp_port, struct ofproto_port_stp_stats *s) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN_RL(&rl, "%s: cannot get STP stats on nonexistent " "port %"PRIu32, ofproto->name, ofp_port); return ENODEV; } return (ofproto->ofproto_class->get_stp_port_stats ? ofproto->ofproto_class->get_stp_port_stats(ofport, s) : EOPNOTSUPP); } /* Rapid Spanning Tree Protocol (RSTP) configuration. */ /* Configures RSTP on 'ofproto' using the settings defined in 's'. If * 's' is NULL, disables RSTP. * * Returns 0 if successful, otherwise a positive errno value. */ int ofproto_set_rstp(struct ofproto *ofproto, const struct ofproto_rstp_settings *s) { if (!ofproto->ofproto_class->set_rstp) { return EOPNOTSUPP; } ofproto->ofproto_class->set_rstp(ofproto, s); return 0; } /* Retrieves RSTP status of 'ofproto' and stores it in 's'. If the * 'enabled' member of 's' is false, then the other members are not * meaningful. * * Returns 0 if successful, otherwise a positive errno value. */ int ofproto_get_rstp_status(struct ofproto *ofproto, struct ofproto_rstp_status *s) { if (!ofproto->ofproto_class->get_rstp_status) { return EOPNOTSUPP; } ofproto->ofproto_class->get_rstp_status(ofproto, s); return 0; } /* Configures RSTP on 'ofp_port' of 'ofproto' using the settings defined * in 's'. 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 the 's' is NULL, then RSTP * is disabled on the port. * * Returns 0 if successful, otherwise a positive errno value.*/ int ofproto_port_set_rstp(struct ofproto *ofproto, ofp_port_t ofp_port, const struct ofproto_port_rstp_settings *s) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot configure RSTP on nonexistent port %"PRIu32, ofproto->name, ofp_port); return ENODEV; } if (!ofproto->ofproto_class->set_rstp_port) { return EOPNOTSUPP; } ofproto->ofproto_class->set_rstp_port(ofport, s); return 0; } /* Retrieves RSTP port status of 'ofp_port' on 'ofproto' and stores it in * 's'. If the 'enabled' member in 's' is false, then the other members * are not meaningful. * * Returns 0 if successful, otherwise a positive errno value.*/ int ofproto_port_get_rstp_status(struct ofproto *ofproto, ofp_port_t ofp_port, struct ofproto_port_rstp_status *s) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN_RL(&rl, "%s: cannot get RSTP status on nonexistent " "port %"PRIu32, ofproto->name, ofp_port); return ENODEV; } if (!ofproto->ofproto_class->get_rstp_port_status) { return EOPNOTSUPP; } ofproto->ofproto_class->get_rstp_port_status(ofport, s); return 0; } /* Queue DSCP configuration. */ /* 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, it is used to implement features which require * knowledge of what queues exist on a port, and some basic information about * them. * * Returns 0 if successful, otherwise a positive errno value. */ int ofproto_port_set_queues(struct ofproto *ofproto, ofp_port_t ofp_port, const struct ofproto_port_queue *queues, size_t n_queues) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot set queues on nonexistent port %"PRIu32, ofproto->name, ofp_port); return ENODEV; } return (ofproto->ofproto_class->set_queues ? ofproto->ofproto_class->set_queues(ofport, queues, n_queues) : EOPNOTSUPP); } /* LLDP configuration. */ void ofproto_port_set_lldp(struct ofproto *ofproto, ofp_port_t ofp_port, const struct smap *cfg) { struct ofport *ofport; int error; ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot configure LLDP on nonexistent port %"PRIu32, ofproto->name, ofp_port); return; } error = (ofproto->ofproto_class->set_lldp ? ofproto->ofproto_class->set_lldp(ofport, cfg) : EOPNOTSUPP); if (error) { VLOG_WARN("%s: lldp configuration on port %"PRIu32" (%s) failed (%s)", ofproto->name, ofp_port, netdev_get_name(ofport->netdev), ovs_strerror(error)); } } int ofproto_set_aa(struct ofproto *ofproto, void *aux OVS_UNUSED, const struct aa_settings *s) { if (!ofproto->ofproto_class->set_aa) { return EOPNOTSUPP; } ofproto->ofproto_class->set_aa(ofproto, s); return 0; } int ofproto_aa_mapping_register(struct ofproto *ofproto, void *aux, const struct aa_mapping_settings *s) { if (!ofproto->ofproto_class->aa_mapping_set) { return EOPNOTSUPP; } ofproto->ofproto_class->aa_mapping_set(ofproto, aux, s); return 0; } int ofproto_aa_mapping_unregister(struct ofproto *ofproto, void *aux) { if (!ofproto->ofproto_class->aa_mapping_unset) { return EOPNOTSUPP; } ofproto->ofproto_class->aa_mapping_unset(ofproto, aux); return 0; } int ofproto_aa_vlan_get_queued(struct ofproto *ofproto, struct ovs_list *list) { if (!ofproto->ofproto_class->aa_vlan_get_queued) { return EOPNOTSUPP; } ofproto->ofproto_class->aa_vlan_get_queued(ofproto, list); return 0; } unsigned int ofproto_aa_vlan_get_queue_size(struct ofproto *ofproto) { if (!ofproto->ofproto_class->aa_vlan_get_queue_size) { return EOPNOTSUPP; } return ofproto->ofproto_class->aa_vlan_get_queue_size(ofproto); } /* Connectivity Fault Management configuration. */ /* Clears the CFM configuration from 'ofp_port' on 'ofproto'. */ void ofproto_port_clear_cfm(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); if (ofport && ofproto->ofproto_class->set_cfm) { ofproto->ofproto_class->set_cfm(ofport, NULL); } } /* Configures connectivity fault management on 'ofp_port' in 'ofproto'. Takes * basic configuration from the configuration members in 'cfm', and the remote * maintenance point ID from remote_mpid. Ignores the statistics members of * 'cfm'. * * This function has no effect if 'ofproto' does not have a port 'ofp_port'. */ void ofproto_port_set_cfm(struct ofproto *ofproto, ofp_port_t ofp_port, const struct cfm_settings *s) { struct ofport *ofport; int error; ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot configure CFM on nonexistent port %"PRIu32, ofproto->name, ofp_port); return; } /* XXX: For configuration simplicity, we only support one remote_mpid * outside of the CFM module. It's not clear if this is the correct long * term solution or not. */ error = (ofproto->ofproto_class->set_cfm ? ofproto->ofproto_class->set_cfm(ofport, s) : EOPNOTSUPP); if (error) { VLOG_WARN("%s: CFM configuration on port %"PRIu32" (%s) failed (%s)", ofproto->name, ofp_port, netdev_get_name(ofport->netdev), ovs_strerror(error)); } } /* Configures BFD on 'ofp_port' in 'ofproto'. This function has no effect if * 'ofproto' does not have a port 'ofp_port'. */ void ofproto_port_set_bfd(struct ofproto *ofproto, ofp_port_t ofp_port, const struct smap *cfg) { struct ofport *ofport; int error; ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot configure bfd on nonexistent port %"PRIu32, ofproto->name, ofp_port); return; } error = (ofproto->ofproto_class->set_bfd ? ofproto->ofproto_class->set_bfd(ofport, cfg) : EOPNOTSUPP); if (error) { VLOG_WARN("%s: bfd configuration on port %"PRIu32" (%s) failed (%s)", ofproto->name, ofp_port, netdev_get_name(ofport->netdev), ovs_strerror(error)); } } /* Checks the status change of BFD on 'ofport'. * * Returns true if 'ofproto_class' does not support 'bfd_status_changed'. */ bool ofproto_port_bfd_status_changed(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); return (ofport && ofproto->ofproto_class->bfd_status_changed ? ofproto->ofproto_class->bfd_status_changed(ofport) : true); } /* Populates 'status' with the status of BFD on 'ofport'. Returns 0 on * success. Returns a positive errno otherwise. Has no effect if 'ofp_port' * is not an OpenFlow port in 'ofproto'. * * The caller must provide and own '*status'. */ int ofproto_port_get_bfd_status(struct ofproto *ofproto, ofp_port_t ofp_port, struct smap *status) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); return (ofport && ofproto->ofproto_class->get_bfd_status ? ofproto->ofproto_class->get_bfd_status(ofport, status) : EOPNOTSUPP); } /* Checks the status of LACP negotiation for 'ofp_port' within ofproto. * Returns 1 if LACP partner information for 'ofp_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 'ofp_port'. */ int ofproto_port_is_lacp_current(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); return (ofport && ofproto->ofproto_class->port_is_lacp_current ? ofproto->ofproto_class->port_is_lacp_current(ofport) : -1); } int ofproto_port_get_lacp_stats(const struct ofport *port, struct lacp_member_stats *stats) { struct ofproto *ofproto = port->ofproto; int error; if (ofproto->ofproto_class->port_get_lacp_stats) { error = ofproto->ofproto_class->port_get_lacp_stats(port, stats); } else { error = EOPNOTSUPP; } return error; } /* Bundles. */ /* 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 a VLAN * configuration plus, 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. * * Bundles only affect the NXAST_AUTOPATH action and output to the OFPP_NORMAL * port. */ int ofproto_bundle_register(struct ofproto *ofproto, void *aux, const struct ofproto_bundle_settings *s) { return (ofproto->ofproto_class->bundle_set ? ofproto->ofproto_class->bundle_set(ofproto, aux, s) : EOPNOTSUPP); } /* Unregisters the bundle registered on 'ofproto' with auxiliary data 'aux'. * If no such bundle has been registered, this has no effect. */ int ofproto_bundle_unregister(struct ofproto *ofproto, void *aux) { return ofproto_bundle_register(ofproto, aux, NULL); } /* Registers a mirror 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 mirror. */ int ofproto_mirror_register(struct ofproto *ofproto, void *aux, const struct ofproto_mirror_settings *s) { return (ofproto->ofproto_class->mirror_set ? ofproto->ofproto_class->mirror_set(ofproto, aux, s) : EOPNOTSUPP); } /* Unregisters the mirror registered on 'ofproto' with auxiliary data 'aux'. * If no mirror has been registered, this has no effect. */ int ofproto_mirror_unregister(struct ofproto *ofproto, void *aux) { return ofproto_mirror_register(ofproto, aux, NULL); } /* 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 counters is not supported, * the appropriate argument is set to UINT64_MAX. */ int ofproto_mirror_get_stats(struct ofproto *ofproto, void *aux, uint64_t *packets, uint64_t *bytes) { if (!ofproto->ofproto_class->mirror_get_stats) { *packets = *bytes = UINT64_MAX; return EOPNOTSUPP; } return ofproto->ofproto_class->mirror_get_stats(ofproto, aux, packets, 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. * * Flood VLANs affect only the treatment of packets output to the OFPP_NORMAL * port. */ int ofproto_set_flood_vlans(struct ofproto *ofproto, unsigned long *flood_vlans) { return (ofproto->ofproto_class->set_flood_vlans ? ofproto->ofproto_class->set_flood_vlans(ofproto, flood_vlans) : EOPNOTSUPP); } /* Returns true if 'aux' is a registered bundle that is currently in use as the * output for a mirror. */ bool ofproto_is_mirror_output_bundle(const struct ofproto *ofproto, void *aux) { return (ofproto->ofproto_class->is_mirror_output_bundle ? ofproto->ofproto_class->is_mirror_output_bundle(ofproto, aux) : false); } /* Configuration of OpenFlow tables. */ /* Returns the number of OpenFlow tables in 'ofproto'. */ int ofproto_get_n_tables(const struct ofproto *ofproto) { return ofproto->n_tables; } /* Returns the number of Controller visible OpenFlow tables * in 'ofproto'. This number will exclude Hidden tables. * This funtion's return value should be less or equal to that of * ofproto_get_n_tables() . */ uint8_t ofproto_get_n_visible_tables(const struct ofproto *ofproto) { uint8_t n = ofproto->n_tables; /* Count only non-hidden tables in the number of tables. (Hidden tables, * if present, are always at the end.) */ while(n && (ofproto->tables[n - 1].flags & OFTABLE_HIDDEN)) { n--; } return n; } /* Configures the OpenFlow table in 'ofproto' with id 'table_id' with the * settings from 's'. 'table_id' must be in the range 0 through the number of * OpenFlow tables in 'ofproto' minus 1, inclusive. * * For read-only tables, only the name may be configured. */ void ofproto_configure_table(struct ofproto *ofproto, int table_id, const struct ofproto_table_settings *s) { struct oftable *table; ovs_assert(table_id >= 0 && table_id < ofproto->n_tables); table = &ofproto->tables[table_id]; oftable_set_name(table, s->name, 2); if (table->flags & OFTABLE_READONLY) { return; } if (classifier_set_prefix_fields(&table->cls, s->prefix_fields, s->n_prefix_fields)) { /* XXX: Trigger revalidation. */ } ovs_mutex_lock(&ofproto_mutex); unsigned int new_eviction = (s->enable_eviction ? table->eviction | EVICTION_CLIENT : table->eviction & ~EVICTION_CLIENT); oftable_configure_eviction(table, new_eviction, s->groups, s->n_groups); table->max_flows = s->max_flows; evict_rules_from_table(table); ovs_mutex_unlock(&ofproto_mutex); } bool ofproto_has_snoops(const struct ofproto *ofproto) { return connmgr_has_snoops(ofproto->connmgr); } void ofproto_get_snoops(const struct ofproto *ofproto, struct sset *snoops) { connmgr_get_snoops(ofproto->connmgr, snoops); } /* Deletes 'rule' from 'ofproto'. * * Within an ofproto implementation, this function allows an ofproto * implementation to destroy any rules that remain when its ->destruct() * function is called. This function is not suitable for use elsewhere in an * ofproto implementation. * * This function implements steps 4.4 and 4.5 in the section titled "Rule Life * Cycle" in ofproto-provider.h. */ void ofproto_rule_delete(struct ofproto *ofproto, struct rule *rule) OVS_EXCLUDED(ofproto_mutex) { /* This skips the ofmonitor and flow-removed notifications because the * switch is being deleted and any OpenFlow channels have been or soon will * be killed. */ ovs_mutex_lock(&ofproto_mutex); if (rule->state == RULE_INSERTED) { /* Make sure there is no postponed removal of the rule. */ ovs_assert(cls_rule_visible_in_version(&rule->cr, OVS_VERSION_MAX)); classifier_remove_assert(&rule->ofproto->tables[rule->table_id].cls, &rule->cr); ofproto_rule_remove__(rule->ofproto, rule); if (ofproto->ofproto_class->rule_delete) { ofproto->ofproto_class->rule_delete(rule); } /* This may not be the last reference to the rule. */ ofproto_rule_unref(rule); } ovs_mutex_unlock(&ofproto_mutex); } static void ofproto_flush__(struct ofproto *ofproto, bool del) OVS_EXCLUDED(ofproto_mutex) { struct oftable *table; /* This will flush all datapath flows. */ if (del && ofproto->ofproto_class->flush) { ofproto->ofproto_class->flush(ofproto); } /* XXX: There is a small race window here, where new datapath flows can be * created by upcall handlers based on the existing flow table. We can not * call ofproto class flush while holding 'ofproto_mutex' to prevent this, * as then we could deadlock on syncing with the handler threads waiting on * the same mutex. */ ovs_mutex_lock(&ofproto_mutex); OFPROTO_FOR_EACH_TABLE (table, ofproto) { struct rule_collection rules; struct rule *rule; if (table->flags & OFTABLE_HIDDEN) { continue; } rule_collection_init(&rules); CLS_FOR_EACH (rule, cr, &table->cls) { rule_collection_add(&rules, rule); } delete_flows__(&rules, OFPRR_DELETE, NULL); } ofproto_group_delete_all__(ofproto); meter_delete_all(ofproto); remove_rules_postponed(ofproto->to_remove); /* XXX: Concurrent handler threads may insert new learned flows based on * learn actions of the now deleted flows right after we release * 'ofproto_mutex'. */ ovs_mutex_unlock(&ofproto_mutex); } static void ofproto_destroy__(struct ofproto *ofproto) OVS_EXCLUDED(ofproto_mutex) { struct oftable *table; cmap_destroy(&ofproto->groups); ovs_mutex_lock(&ofproto_mutex); hmap_remove(&all_ofprotos, &ofproto->hmap_node); ovs_mutex_unlock(&ofproto_mutex); free(ofproto->name); free(ofproto->type); free(ofproto->mfr_desc); free(ofproto->hw_desc); free(ofproto->sw_desc); free(ofproto->serial_desc); free(ofproto->dp_desc); hmap_destroy(&ofproto->ports); hmap_destroy(&ofproto->ofport_usage); shash_destroy(&ofproto->port_by_name); simap_destroy(&ofproto->ofp_requests); OFPROTO_FOR_EACH_TABLE (table, ofproto) { oftable_destroy(table); } free(ofproto->tables); hmap_destroy(&ofproto->meters); ovs_mutex_lock(&ofproto->vl_mff_map.mutex); mf_vl_mff_map_clear(&ofproto->vl_mff_map, true); ovs_mutex_unlock(&ofproto->vl_mff_map.mutex); cmap_destroy(&ofproto->vl_mff_map.cmap); ovs_mutex_destroy(&ofproto->vl_mff_map.mutex); tun_metadata_free(ovsrcu_get_protected(struct tun_table *, &ofproto->metadata_tab)); ovs_assert(hindex_is_empty(&ofproto->cookies)); hindex_destroy(&ofproto->cookies); ovs_assert(hmap_is_empty(&ofproto->learned_cookies)); hmap_destroy(&ofproto->learned_cookies); ovs_mutex_lock(&ofproto_mutex); rule_collection_destroy(ofproto->to_remove); free(ofproto->to_remove); ovs_mutex_unlock(&ofproto_mutex); ofproto->ofproto_class->dealloc(ofproto); } /* * Rule destruction requires ofproto to remain accessible. * Depending on the rule destruction call (shown in below), it can take several * RCU grace periods before the ofproto reference is not needed anymore. * The ofproto destruction callback is thus protected by a refcount, * and such destruction is itself deferred. * * remove_rules_postponed (one grace period) * -> remove_rule_rcu * -> remove_rule_rcu__ * -> ofproto_rule_unref -> ref count != 1 * -> ... more grace periods. * -> rule_destroy_cb (> 2 grace periods) * -> free * * NOTE: The original ofproto destruction is only deferred by two grace * periods to keep ofproto accessible. By using refcount together the * destruction can be deferred for longer time. Now ofproto has 3 states: * * state 1: alive, with refcount >= 1 * state 2: dying, with refcount == 0, however pointer is valid * state 3: died, memory freed, pointer might be dangling. * * We only need to add refcount to certain objects whose destruction can * take several RCU grace periods (rule, group, xlate_cache). Other * references to ofproto must be cleared before the 2 RCU grace periods. */ static void ofproto_destroy_defer__(struct ofproto *ofproto) OVS_EXCLUDED(ofproto_mutex) { ovsrcu_postpone(ofproto_destroy__, ofproto); } void ofproto_ref(struct ofproto *ofproto) { ovs_refcount_ref(&ofproto->refcount); } bool ofproto_try_ref(struct ofproto *ofproto) { return ovs_refcount_try_ref_rcu(&ofproto->refcount); } void ofproto_unref(struct ofproto *ofproto) { if (ofproto && ovs_refcount_unref(&ofproto->refcount) == 1) { ovsrcu_postpone(ofproto_destroy_defer__, ofproto); } } void ofproto_destroy(struct ofproto *p, bool del) OVS_EXCLUDED(ofproto_mutex) { struct ofport *ofport; struct ofport_usage *usage; if (!p) { return; } ofproto_flush__(p, del); HMAP_FOR_EACH_SAFE (ofport, hmap_node, &p->ports) { ofport_destroy(ofport, del); } HMAP_FOR_EACH_POP (usage, hmap_node, &p->ofport_usage) { free(usage); } p->ofproto_class->destruct(p, del); /* We should not postpone this because it involves deleting a listening * socket which we may want to reopen soon. 'connmgr' may be used by other * threads only if they take the ofproto_mutex and read a non-NULL * 'ofproto->connmgr'. */ ovs_mutex_lock(&ofproto_mutex); connmgr_destroy(p->connmgr); p->connmgr = NULL; ovs_mutex_unlock(&ofproto_mutex); ofproto_unref(p); } /* Destroys the datapath with the respective 'name' and 'type'. With the Linux * kernel datapath, for example, this destroys the datapath in the kernel, and * with the netdev-based datapath, it tears down the data structures that * represent the datapath. * * The datapath should not be currently open as an ofproto. */ int ofproto_delete(const char *name, const char *type) { const struct ofproto_class *class = ofproto_class_find__(type); return (!class ? EAFNOSUPPORT : !class->del ? EACCES : class->del(type, name)); } static void process_port_change(struct ofproto *ofproto, int error, char *devname) { if (error == ENOBUFS) { reinit_ports(ofproto); } else if (!error) { update_port(ofproto, devname); free(devname); } } int ofproto_type_run(const char *datapath_type) { const struct ofproto_class *class; int error; datapath_type = ofproto_normalize_type(datapath_type); class = ofproto_class_find__(datapath_type); error = class->type_run ? class->type_run(datapath_type) : 0; if (error && error != EAGAIN) { VLOG_ERR_RL(&rl, "%s: type_run failed (%s)", datapath_type, ovs_strerror(error)); } return error; } void ofproto_type_wait(const char *datapath_type) { const struct ofproto_class *class; datapath_type = ofproto_normalize_type(datapath_type); class = ofproto_class_find__(datapath_type); if (class->type_wait) { class->type_wait(datapath_type); } } int ofproto_run(struct ofproto *p) { int error; uint64_t new_seq; error = p->ofproto_class->run(p); if (error && error != EAGAIN) { VLOG_ERR_RL(&rl, "%s: run failed (%s)", p->name, ovs_strerror(error)); } /* Restore the eviction group heap invariant occasionally. */ if (p->eviction_group_timer < time_msec()) { size_t i; p->eviction_group_timer = time_msec() + 1000; for (i = 0; i < p->n_tables; i++) { struct oftable *table = &p->tables[i]; struct eviction_group *evg; struct rule *rule; if (!table->eviction) { continue; } if (table->n_flows > 100000) { static struct vlog_rate_limit count_rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&count_rl, "Table %"PRIuSIZE" has an excessive" " number of rules: %d", i, table->n_flows); } ovs_mutex_lock(&ofproto_mutex); CLS_FOR_EACH (rule, cr, &table->cls) { if (rule->idle_timeout || rule->hard_timeout) { if (!rule->eviction_group) { eviction_group_add_rule(rule); } else { heap_raw_change(&rule->evg_node, rule_eviction_priority(p, rule)); } } } HEAP_FOR_EACH (evg, size_node, &table->eviction_groups_by_size) { heap_rebuild(&evg->rules); } ovs_mutex_unlock(&ofproto_mutex); } } if (p->ofproto_class->port_poll) { char *devname; while ((error = p->ofproto_class->port_poll(p, &devname)) != EAGAIN) { process_port_change(p, error, devname); } } new_seq = seq_read(connectivity_seq_get()); if (new_seq != p->change_seq) { struct sset devnames; const char *devname; struct ofport *ofport; /* Update OpenFlow port status for any port whose netdev has changed. * * Refreshing a given 'ofport' can cause an arbitrary ofport to be * destroyed, so it's not safe to update ports directly from the * HMAP_FOR_EACH loop, or even to use HMAP_FOR_EACH_SAFE. Instead, we * need this two-phase approach. */ sset_init(&devnames); HMAP_FOR_EACH (ofport, hmap_node, &p->ports) { uint64_t port_change_seq; port_change_seq = netdev_get_change_seq(ofport->netdev); if (ofport->change_seq != port_change_seq) { ofport->change_seq = port_change_seq; sset_add(&devnames, netdev_get_name(ofport->netdev)); } } SSET_FOR_EACH (devname, &devnames) { update_port(p, devname); } sset_destroy(&devnames); p->change_seq = new_seq; } connmgr_run(p->connmgr, handle_openflow); ovs_mutex_lock(&ofproto_mutex); remove_rules_postponed(p->to_remove); ovs_mutex_unlock(&ofproto_mutex); return error; } void ofproto_wait(struct ofproto *p) { p->ofproto_class->wait(p); if (p->ofproto_class->port_poll_wait) { p->ofproto_class->port_poll_wait(p); } seq_wait(connectivity_seq_get(), p->change_seq); connmgr_wait(p->connmgr); } bool ofproto_is_alive(const struct ofproto *p) { return (connmgr_has_controllers(p->connmgr) && connmgr_is_any_controller_admitted(p->connmgr)); } /* Adds some memory usage statistics for 'ofproto' into 'usage', for use with * memory_report(). */ void ofproto_get_memory_usage(const struct ofproto *ofproto, struct simap *usage) { const struct oftable *table; unsigned int n_rules; simap_increase(usage, "ports", hmap_count(&ofproto->ports)); n_rules = 0; OFPROTO_FOR_EACH_TABLE (table, ofproto) { n_rules += table->n_flows; } simap_increase(usage, "rules", n_rules); if (ofproto->ofproto_class->get_memory_usage) { ofproto->ofproto_class->get_memory_usage(ofproto, usage); } connmgr_get_memory_usage(ofproto->connmgr, usage); } void ofproto_type_get_memory_usage(const char *datapath_type, struct simap *usage) { const struct ofproto_class *class; datapath_type = ofproto_normalize_type(datapath_type); class = ofproto_class_find__(datapath_type); if (class && class->type_get_memory_usage) { class->type_get_memory_usage(datapath_type, usage); } } void ofproto_get_ofproto_controller_info(const struct ofproto *ofproto, struct shash *info) { connmgr_get_controller_info(ofproto->connmgr, info); } void ofproto_free_ofproto_controller_info(struct shash *info) { connmgr_free_controller_info(info); } const char * ofconn_type_to_string(enum ofconn_type type) { return type == OFCONN_PRIMARY ? "primary" : "service"; } /* Makes a deep copy of 'old' into 'port'. */ void ofproto_port_clone(struct ofproto_port *port, const struct ofproto_port *old) { port->name = xstrdup(old->name); port->type = xstrdup(old->type); port->ofp_port = old->ofp_port; } /* Frees memory allocated to members of 'ofproto_port'. * * Do not call this function on an ofproto_port obtained from * ofproto_port_dump_next(): that function retains ownership of the data in the * ofproto_port. */ void ofproto_port_destroy(struct ofproto_port *ofproto_port) { free(ofproto_port->name); free(ofproto_port->type); } /* Initializes 'dump' to begin dumping the ports in an ofproto. * * This function provides no status indication. An error status for the entire * dump operation is provided when it is completed by calling * ofproto_port_dump_done(). */ void ofproto_port_dump_start(struct ofproto_port_dump *dump, const struct ofproto *ofproto) { dump->ofproto = ofproto; dump->error = ofproto->ofproto_class->port_dump_start(ofproto, &dump->state); } /* Attempts to retrieve another port from 'dump', which must have been created * with ofproto_port_dump_start(). On success, stores a new ofproto_port into * 'port' and returns true. On failure, returns false. * * Failure might indicate an actual error or merely that the last port has been * dumped. An error status for the entire dump operation is provided when it * is completed by calling ofproto_port_dump_done(). * * The ofproto owns the data stored in 'port'. It will remain valid until at * least the next time 'dump' is passed to ofproto_port_dump_next() or * ofproto_port_dump_done(). */ bool ofproto_port_dump_next(struct ofproto_port_dump *dump, struct ofproto_port *port) { const struct ofproto *ofproto = dump->ofproto; if (dump->error) { return false; } dump->error = ofproto->ofproto_class->port_dump_next(ofproto, dump->state, port); if (dump->error) { ofproto->ofproto_class->port_dump_done(ofproto, dump->state); return false; } return true; } /* Completes port table dump operation 'dump', which must have been created * with ofproto_port_dump_start(). Returns 0 if the dump operation was * error-free, otherwise a positive errno value describing the problem. */ int ofproto_port_dump_done(struct ofproto_port_dump *dump) { const struct ofproto *ofproto = dump->ofproto; if (!dump->error) { dump->error = ofproto->ofproto_class->port_dump_done(ofproto, dump->state); } return dump->error == EOF ? 0 : dump->error; } /* Returns the type to pass to netdev_open() when 'ofproto' 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 * ofproto_port_open_type(const struct ofproto *ofproto, const char *port_type) { return (ofproto->ofproto_class->port_open_type ? ofproto->ofproto_class->port_open_type(ofproto->type, port_type) : port_type); } /* Attempts to add 'netdev' as a port on 'ofproto'. If 'ofp_portp' is * non-null and '*ofp_portp' is not OFPP_NONE, attempts to use that as * the port's OpenFlow port number. * * If successful, returns 0 and sets '*ofp_portp' to the new port's * OpenFlow port number (if 'ofp_portp' is non-null). On failure, * returns a positive errno value and sets '*ofp_portp' to OFPP_NONE (if * 'ofp_portp' is non-null). */ int ofproto_port_add(struct ofproto *ofproto, struct netdev *netdev, ofp_port_t *ofp_portp) { ofp_port_t ofp_port = ofp_portp ? *ofp_portp : OFPP_NONE; int error; error = ofproto->ofproto_class->port_add(ofproto, netdev); if (!error) { const char *netdev_name = netdev_get_name(netdev); simap_put(&ofproto->ofp_requests, netdev_name, ofp_to_u16(ofp_port)); error = update_port(ofproto, netdev_name); } if (ofp_portp) { *ofp_portp = OFPP_NONE; if (!error) { struct ofproto_port ofproto_port; error = ofproto_port_query_by_name(ofproto, netdev_get_name(netdev), &ofproto_port); if (!error) { *ofp_portp = ofproto_port.ofp_port; ofproto_port_destroy(&ofproto_port); } } } return error; } /* Looks up a port named 'devname' in 'ofproto'. On success, returns 0 and * initializes '*port' appropriately; on failure, returns a positive errno * value. * * The caller owns the data in 'ofproto_port' and must free it with * ofproto_port_destroy() when it is no longer needed. */ int ofproto_port_query_by_name(const struct ofproto *ofproto, const char *devname, struct ofproto_port *port) { int error; error = ofproto->ofproto_class->port_query_by_name(ofproto, devname, port); if (error) { memset(port, 0, sizeof *port); } return error; } /* Deletes port number 'ofp_port' from the datapath for 'ofproto'. * Returns 0 if successful, otherwise a positive errno. */ int ofproto_port_del(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); const char *name = ofport ? netdev_get_name(ofport->netdev) : ""; struct simap_node *ofp_request_node; int error; ofp_request_node = simap_find(&ofproto->ofp_requests, name); if (ofp_request_node) { simap_delete(&ofproto->ofp_requests, ofp_request_node); } error = ofproto->ofproto_class->port_del(ofproto, ofp_port); if (!error && ofport) { /* 'name' is the netdev's name and update_port() is going to close the * netdev. Just in case update_port() refers to 'name' after it * destroys 'ofport', make a copy of it around the update_port() * call. */ char *devname = xstrdup(name); update_port(ofproto, devname); free(devname); } return error; } /* Refreshes datapath configuration of port number 'ofp_port' in 'ofproto'. * * This function has no effect if 'ofproto' does not have a port 'ofp_port'. */ void ofproto_port_set_config(struct ofproto *ofproto, ofp_port_t ofp_port, const struct smap *cfg) { struct ofport *ofport; int error; ofport = ofproto_get_port(ofproto, ofp_port); if (!ofport) { VLOG_WARN("%s: cannot configure datapath on nonexistent port %"PRIu32, ofproto->name, ofp_port); return; } error = (ofproto->ofproto_class->port_set_config ? ofproto->ofproto_class->port_set_config(ofport, cfg) : EOPNOTSUPP); if (error) { VLOG_WARN("%s: datapath configuration on port %"PRIu32 " (%s) failed (%s)", ofproto->name, ofp_port, netdev_get_name(ofport->netdev), ovs_strerror(error)); } } static void flow_mod_init(struct ofputil_flow_mod *fm, const struct match *match, int priority, const struct ofpact *ofpacts, size_t ofpacts_len, enum ofp_flow_mod_command command) { *fm = (struct ofputil_flow_mod) { .priority = priority, .table_id = 0, .command = command, .buffer_id = UINT32_MAX, .out_port = OFPP_ANY, .out_group = OFPG_ANY, .ofpacts = CONST_CAST(struct ofpact *, ofpacts), .ofpacts_len = ofpacts_len, }; minimatch_init(&fm->match, match); } static int simple_flow_mod(struct ofproto *ofproto, const struct match *match, int priority, const struct ofpact *ofpacts, size_t ofpacts_len, enum ofp_flow_mod_command command) { struct ofputil_flow_mod fm; flow_mod_init(&fm, match, priority, ofpacts, ofpacts_len, command); enum ofperr error = handle_flow_mod__(ofproto, &fm, NULL); minimatch_destroy(&fm.match); return error; } /* Adds a flow to OpenFlow flow table 0 in 'p' that matches 'cls_rule' and * performs the 'n_actions' actions in 'actions'. The new flow will not * timeout. * * If cls_rule->priority is in the range of priorities supported by OpenFlow * (0...65535, inclusive) then the flow will be visible to OpenFlow * controllers; otherwise, it will be hidden. * * The caller retains ownership of 'cls_rule' and 'ofpacts'. * * This is a helper function for in-band control and fail-open. */ void ofproto_add_flow(struct ofproto *ofproto, const struct match *match, int priority, const struct ofpact *ofpacts, size_t ofpacts_len) OVS_EXCLUDED(ofproto_mutex) { const struct rule *rule; bool must_add; /* First do a cheap check whether the rule we're looking for already exists * with the actions that we want. If it does, then we're done. */ rule = rule_from_cls_rule(classifier_find_match_exactly( &ofproto->tables[0].cls, match, priority, OVS_VERSION_MAX)); if (rule) { const struct rule_actions *actions = rule_get_actions(rule); must_add = !ofpacts_equal(actions->ofpacts, actions->ofpacts_len, ofpacts, ofpacts_len); } else { must_add = true; } /* If there's no such rule or the rule doesn't have the actions we want, * fall back to a executing a full flow mod. We can't optimize this at * all because we didn't take enough locks above to ensure that the flow * table didn't already change beneath us. */ if (must_add) { simple_flow_mod(ofproto, match, priority, ofpacts, ofpacts_len, OFPFC_MODIFY_STRICT); } } /* Executes the flow modification specified in 'fm'. Returns 0 on success, or * an OFPERR_* OpenFlow error code on failure. * * This is a helper function for in-band control and fail-open. */ enum ofperr ofproto_flow_mod(struct ofproto *ofproto, const struct ofputil_flow_mod *fm) OVS_EXCLUDED(ofproto_mutex) { return handle_flow_mod__(ofproto, fm, NULL); } /* Searches for a rule with matching criteria exactly equal to 'target' in * ofproto's table 0 and, if it finds one, deletes it. * * This is a helper function for in-band control and fail-open. */ void ofproto_delete_flow(struct ofproto *ofproto, const struct match *target, int priority) OVS_REQUIRES(ofproto_mutex) { struct classifier *cls = &ofproto->tables[0].cls; struct rule *rule; /* First do a cheap check whether the rule we're looking for has already * been deleted. If so, then we're done. */ rule = rule_from_cls_rule(classifier_find_match_exactly( cls, target, priority, OVS_VERSION_MAX)); if (!rule) { return; } struct rule_collection rules; rule_collection_init(&rules); rule_collection_add(&rules, rule); delete_flows__(&rules, OFPRR_DELETE, NULL); rule_collection_destroy(&rules); } /* Delete all of the flows from all of ofproto's flow tables, then reintroduce * the flows required by in-band control and fail-open. */ void ofproto_flush_flows(struct ofproto *ofproto) { COVERAGE_INC(ofproto_flush); ofproto_flush__(ofproto, false); connmgr_flushed(ofproto->connmgr); } static void reinit_ports(struct ofproto *p) { struct ofproto_port_dump dump; struct sset devnames; struct ofport *ofport; struct ofproto_port ofproto_port; const char *devname; COVERAGE_INC(ofproto_reinit_ports); sset_init(&devnames); HMAP_FOR_EACH (ofport, hmap_node, &p->ports) { sset_add(&devnames, netdev_get_name(ofport->netdev)); } OFPROTO_PORT_FOR_EACH (&ofproto_port, &dump, p) { sset_add(&devnames, ofproto_port.name); } SSET_FOR_EACH (devname, &devnames) { update_port(p, devname); } sset_destroy(&devnames); } static ofp_port_t alloc_ofp_port(struct ofproto *ofproto, const char *netdev_name) { uint16_t port_idx; port_idx = simap_get(&ofproto->ofp_requests, netdev_name); port_idx = port_idx ? port_idx : UINT16_MAX; if (port_idx >= ofproto->max_ports || ofport_get_usage(ofproto, u16_to_ofp(port_idx)) == LLONG_MAX) { uint16_t lru_ofport = 0, end_port_no = ofproto->alloc_port_no; long long int last_used_at, lru = LLONG_MAX; /* Search for a free OpenFlow port number. We try not to * immediately reuse them to prevent problems due to old * flows. * * We limit the automatically assigned port numbers to the lower half * of the port range, to reserve the upper half for assignment by * controllers. */ for (;;) { if (++ofproto->alloc_port_no >= MIN(ofproto->max_ports, 32768)) { ofproto->alloc_port_no = 1; } last_used_at = ofport_get_usage(ofproto, u16_to_ofp(ofproto->alloc_port_no)); if (!last_used_at) { port_idx = ofproto->alloc_port_no; break; } else if ( last_used_at < time_msec() - 60*60*1000) { /* If the port with ofport 'ofproto->alloc_port_no' was deleted * more than an hour ago, consider it usable. */ ofport_remove_usage(ofproto, u16_to_ofp(ofproto->alloc_port_no)); port_idx = ofproto->alloc_port_no; break; } else if (last_used_at < lru) { lru = last_used_at; lru_ofport = ofproto->alloc_port_no; } if (ofproto->alloc_port_no == end_port_no) { if (lru_ofport) { port_idx = lru_ofport; break; } return OFPP_NONE; } } } ofport_set_usage(ofproto, u16_to_ofp(port_idx), LLONG_MAX); return u16_to_ofp(port_idx); } static void dealloc_ofp_port(struct ofproto *ofproto, ofp_port_t ofp_port) { if (ofp_to_u16(ofp_port) < ofproto->max_ports) { ofport_set_usage(ofproto, ofp_port, time_msec()); } } /* Opens a netdev for 'ofproto_port' in 'ofproto' and set to p_netdev, * or a null pointer if the netdev cannot be opened. On success, also * fills in '*pp'. Returns 0 on success, or a positive error number. */ static int ofport_open(struct ofproto *ofproto, struct ofproto_port *ofproto_port, struct ofputil_phy_port *pp, struct netdev **p_netdev) { enum netdev_flags flags; struct netdev *netdev; int error; *p_netdev = NULL; error = netdev_open(ofproto_port->name, ofproto_port->type, &netdev); if (error) { VLOG_WARN_RL(&rl, "%s: ignoring port %s (%"PRIu32") because netdev %s " "cannot be opened (%s)", ofproto->name, ofproto_port->name, ofproto_port->ofp_port, ofproto_port->name, ovs_strerror(error)); return 0; } if (ofproto_port->ofp_port == OFPP_NONE) { if (!strcmp(ofproto->name, ofproto_port->name)) { ofproto_port->ofp_port = OFPP_LOCAL; } else { ofp_port_t ofp_port = alloc_ofp_port(ofproto, ofproto_port->name); if (ofp_port == OFPP_NONE) { VLOG_WARN_RL(&rl, "%s: failed to allocated ofp port number " "for %s.", ofproto->name, ofproto_port->name); netdev_close(netdev); return ENOSPC; } ofproto_port->ofp_port = ofp_port; } } pp->port_no = ofproto_port->ofp_port; netdev_get_etheraddr(netdev, &pp->hw_addr); ovs_strlcpy(pp->name, ofproto_port->name, sizeof pp->name); netdev_get_flags(netdev, &flags); pp->config = flags & NETDEV_UP ? 0 : OFPUTIL_PC_PORT_DOWN; pp->state = netdev_get_carrier(netdev) ? 0 : OFPUTIL_PS_LINK_DOWN; netdev_get_features(netdev, &pp->curr, &pp->advertised, &pp->supported, &pp->peer); pp->curr_speed = netdev_features_to_bps(pp->curr, 0) / 1000; pp->max_speed = netdev_features_to_bps(pp->supported, 0) / 1000; *p_netdev = netdev; return 0; } /* Returns true if most fields of 'a' and 'b' are equal. Differences in name * and port number are disregarded. */ static bool ofport_equal(const struct ofputil_phy_port *a, const struct ofputil_phy_port *b) { return (eth_addr_equals(a->hw_addr, b->hw_addr) && a->state == b->state && a->config == b->config && a->curr == b->curr && a->advertised == b->advertised && a->supported == b->supported && a->peer == b->peer && a->curr_speed == b->curr_speed && a->max_speed == b->max_speed); } /* Adds an ofport to 'p' initialized based on the given 'netdev' and 'opp'. * The caller must ensure that 'p' does not have a conflicting ofport (that is, * one with the same name or port number). */ static int ofport_install(struct ofproto *p, struct netdev *netdev, const struct ofputil_phy_port *pp) { const char *netdev_name = netdev_get_name(netdev); struct ofport *ofport; int error; /* Create ofport. */ ofport = p->ofproto_class->port_alloc(); if (!ofport) { error = ENOMEM; goto error; } ofport->ofproto = p; ofport->netdev = netdev; ofport->change_seq = netdev_get_change_seq(netdev); ofport->pp = *pp; ofport->ofp_port = pp->port_no; ofport->created = time_msec(); ofport->may_enable = false; /* Add port to 'p'. */ hmap_insert(&p->ports, &ofport->hmap_node, hash_ofp_port(ofport->ofp_port)); shash_add(&p->port_by_name, netdev_name, ofport); update_mtu(p, ofport); /* Let the ofproto_class initialize its private data. */ error = p->ofproto_class->port_construct(ofport); if (error) { goto error; } connmgr_send_port_status(p->connmgr, NULL, NULL, pp, OFPPR_ADD); return 0; error: VLOG_WARN_RL(&rl, "%s: could not add port %s (%s)", p->name, netdev_name, ovs_strerror(error)); if (ofport) { ofport_destroy__(ofport); } else { netdev_close(netdev); } return error; } /* Removes 'ofport' from 'p' and destroys it. */ static void ofport_remove(struct ofport *ofport) { struct ofproto *p = ofport->ofproto; bool is_mtu_overridden = ofport_is_mtu_overridden(p, ofport); connmgr_send_port_status(ofport->ofproto->connmgr, NULL, NULL, &ofport->pp, OFPPR_DELETE); ofport_destroy(ofport, true); if (!is_mtu_overridden) { update_mtu_ofproto(p); } } /* If 'ofproto' contains an ofport named 'name', removes it from 'ofproto' and * destroys it. */ static void ofport_remove_with_name(struct ofproto *ofproto, const char *name) { struct ofport *port = shash_find_data(&ofproto->port_by_name, name); if (port) { ofport_remove(port); } } static enum ofputil_port_state normalize_state(enum ofputil_port_config config, enum ofputil_port_state state, bool may_enable) { return (config & OFPUTIL_PC_PORT_DOWN || state & OFPUTIL_PS_LINK_DOWN || !may_enable ? state & ~OFPUTIL_PS_LIVE : state | OFPUTIL_PS_LIVE); } void ofproto_port_set_enable(struct ofport *port, bool enable) { if (enable != port->may_enable) { port->may_enable = enable; ofproto_port_set_state(port, normalize_state(port->pp.config, port->pp.state, port->may_enable)); } } /* Update OpenFlow 'state' in 'port' and notify controller. */ void ofproto_port_set_state(struct ofport *port, enum ofputil_port_state state) { state = normalize_state(port->pp.config, state, port->may_enable); if (port->pp.state != state) { struct ofputil_phy_port old_pp = port->pp; port->pp.state = state; connmgr_send_port_status(port->ofproto->connmgr, NULL, &old_pp, &port->pp, OFPPR_MODIFY); } } void ofproto_port_unregister(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *port = ofproto_get_port(ofproto, ofp_port); if (port) { if (port->ofproto->ofproto_class->set_lldp) { port->ofproto->ofproto_class->set_lldp(port, NULL); } if (port->ofproto->ofproto_class->set_stp_port) { port->ofproto->ofproto_class->set_stp_port(port, NULL); } if (port->ofproto->ofproto_class->set_rstp_port) { port->ofproto->ofproto_class->set_rstp_port(port, NULL); } if (port->ofproto->ofproto_class->set_cfm) { port->ofproto->ofproto_class->set_cfm(port, NULL); } if (port->ofproto->ofproto_class->bundle_remove) { port->ofproto->ofproto_class->bundle_remove(port); } } } static void ofport_destroy__(struct ofport *port) { struct ofproto *ofproto = port->ofproto; const char *name = netdev_get_name(port->netdev); dealloc_ofp_port(port->ofproto, port->ofp_port); hmap_remove(&ofproto->ports, &port->hmap_node); shash_find_and_delete(&ofproto->port_by_name, name); netdev_close(port->netdev); ofproto->ofproto_class->port_dealloc(port); } static void ofport_destroy(struct ofport *port, bool del) { if (port) { port->ofproto->ofproto_class->port_destruct(port, del); ofport_destroy__(port); } } struct ofport * ofproto_get_port(const struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *port; HMAP_FOR_EACH_IN_BUCKET (port, hmap_node, hash_ofp_port(ofp_port), &ofproto->ports) { if (port->ofp_port == ofp_port) { return port; } } return NULL; } static long long int ofport_get_usage(const struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport_usage *usage; HMAP_FOR_EACH_IN_BUCKET (usage, hmap_node, hash_ofp_port(ofp_port), &ofproto->ofport_usage) { if (usage->ofp_port == ofp_port) { return usage->last_used; } } return 0; } static void ofport_set_usage(struct ofproto *ofproto, ofp_port_t ofp_port, long long int last_used) { struct ofport_usage *usage; HMAP_FOR_EACH_IN_BUCKET (usage, hmap_node, hash_ofp_port(ofp_port), &ofproto->ofport_usage) { if (usage->ofp_port == ofp_port) { usage->last_used = last_used; return; } } ovs_assert(last_used == LLONG_MAX); usage = xmalloc(sizeof *usage); usage->ofp_port = ofp_port; usage->last_used = last_used; hmap_insert(&ofproto->ofport_usage, &usage->hmap_node, hash_ofp_port(ofp_port)); } static void ofport_remove_usage(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport_usage *usage; HMAP_FOR_EACH_IN_BUCKET (usage, hmap_node, hash_ofp_port(ofp_port), &ofproto->ofport_usage) { if (usage->ofp_port == ofp_port) { hmap_remove(&ofproto->ofport_usage, &usage->hmap_node); free(usage); break; } } } int ofproto_port_get_stats(const struct ofport *port, struct netdev_stats *stats) { struct ofproto *ofproto = port->ofproto; int error; if (ofproto->ofproto_class->port_get_stats) { error = ofproto->ofproto_class->port_get_stats(port, stats); } else { error = EOPNOTSUPP; } return error; } int ofproto_vport_get_status(const struct ofproto *ofproto, ofp_port_t ofp_port, char **errp) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); return (ofport && ofproto->ofproto_class->vport_get_status) ? ofproto->ofproto_class->vport_get_status(ofport, errp) : EOPNOTSUPP; } static int update_port(struct ofproto *ofproto, const char *name) { struct ofproto_port ofproto_port; struct ofputil_phy_port pp; struct netdev *netdev; struct ofport *port; int error = 0; COVERAGE_INC(ofproto_update_port); /* Fetch 'name''s location and properties from the datapath. */ if (ofproto_port_query_by_name(ofproto, name, &ofproto_port)) { netdev = NULL; } else { error = ofport_open(ofproto, &ofproto_port, &pp, &netdev); } if (netdev) { port = ofproto_get_port(ofproto, ofproto_port.ofp_port); if (port && !strcmp(netdev_get_name(port->netdev), name)) { struct netdev *old_netdev = port->netdev; /* ofport_open() only sets OFPUTIL_PC_PORT_DOWN and * OFPUTIL_PS_LINK_DOWN. Keep the other config and state bits (but * a port that is down cannot be live). */ pp.config |= port->pp.config & ~OFPUTIL_PC_PORT_DOWN; pp.state |= port->pp.state & ~OFPUTIL_PS_LINK_DOWN; pp.state = normalize_state(pp.config, pp.state, port->may_enable); /* 'name' hasn't changed location. Any properties changed? */ if (!ofport_equal(&port->pp, &pp)) { connmgr_send_port_status(port->ofproto->connmgr, NULL, &port->pp, &pp, OFPPR_MODIFY); port->pp = pp; } update_mtu(ofproto, port); /* Install the newly opened netdev in case it has changed. * Don't close the old netdev yet in case port_modified has to * remove a retained reference to it.*/ port->netdev = netdev; port->change_seq = netdev_get_change_seq(netdev); if (port->ofproto->ofproto_class->port_modified) { port->ofproto->ofproto_class->port_modified(port); } netdev_close(old_netdev); } else { /* If 'port' is nonnull then its name differs from 'name' and thus * we should delete it. If we think there's a port named 'name' * then its port number must be wrong now so delete it too. */ if (port) { ofport_remove(port); } ofport_remove_with_name(ofproto, name); error = ofport_install(ofproto, netdev, &pp); } } else { /* Any port named 'name' is gone now. */ ofport_remove_with_name(ofproto, name); } ofproto_port_destroy(&ofproto_port); return error; } static int init_ports(struct ofproto *p) { struct ofproto_port_dump dump; struct ofproto_port ofproto_port; struct shash_node *node; OFPROTO_PORT_FOR_EACH (&ofproto_port, &dump, p) { const char *name = ofproto_port.name; if (shash_find(&p->port_by_name, name)) { VLOG_WARN_RL(&rl, "%s: ignoring duplicate device %s in datapath", p->name, name); } else { struct ofputil_phy_port pp; struct netdev *netdev; /* Check if an OpenFlow port number had been requested. */ node = shash_find(&init_ofp_ports, name); if (node) { const struct iface_hint *iface_hint = node->data; simap_put(&p->ofp_requests, name, ofp_to_u16(iface_hint->ofp_port)); } ofport_open(p, &ofproto_port, &pp, &netdev); if (netdev) { ofport_install(p, netdev, &pp); if (ofp_to_u16(ofproto_port.ofp_port) < p->max_ports) { p->alloc_port_no = MAX(p->alloc_port_no, ofp_to_u16(ofproto_port.ofp_port)); } } } } SHASH_FOR_EACH_SAFE (node, &init_ofp_ports) { struct iface_hint *iface_hint = node->data; if (!strcmp(iface_hint->br_name, p->name)) { free(iface_hint->br_name); free(iface_hint->br_type); free(iface_hint); shash_delete(&init_ofp_ports, node); } } return 0; } static bool ofport_is_internal_or_patch(const struct ofproto *p, const struct ofport *port) { const char *netdev_type = netdev_get_type(port->netdev); return !strcmp(netdev_type, ofproto_port_open_type(p, "internal")) || !strcmp(netdev_type, ofproto_port_open_type(p, "patch")); } /* If 'port' is internal or patch and if the user didn't explicitly specify an * mtu through the database, we have to override it. */ static bool ofport_is_mtu_overridden(const struct ofproto *p, const struct ofport *port) { return ofport_is_internal_or_patch(p, port) && !netdev_mtu_is_user_config(port->netdev); } /* Find the minimum MTU of all non-overridden devices attached to 'p'. * Returns ETH_PAYLOAD_MAX or the minimum of the ports. */ static int find_min_mtu(struct ofproto *p) { struct ofport *ofport; int mtu = 0; HMAP_FOR_EACH (ofport, hmap_node, &p->ports) { struct netdev *netdev = ofport->netdev; int dev_mtu; /* Skip any overridden port, since that's what we're trying to set. */ if (ofport_is_mtu_overridden(p, ofport)) { continue; } if (netdev_get_mtu(netdev, &dev_mtu)) { continue; } if (!mtu || dev_mtu < mtu) { mtu = dev_mtu; } } return mtu ? mtu: ETH_PAYLOAD_MAX; } /* Update MTU of all overridden devices on 'p' to the minimum of the * non-overridden ports in event of 'port' added or changed. */ static void update_mtu(struct ofproto *p, struct ofport *port) { struct netdev *netdev = port->netdev; int dev_mtu; if (netdev_get_mtu(netdev, &dev_mtu)) { port->mtu = 0; return; } if (ofport_is_mtu_overridden(p, port)) { if (dev_mtu > p->min_mtu) { if (!netdev_set_mtu(port->netdev, p->min_mtu)) { dev_mtu = p->min_mtu; } } port->mtu = dev_mtu; return; } port->mtu = dev_mtu; /* For non-overridden port find new min mtu. */ update_mtu_ofproto(p); } static void update_mtu_ofproto(struct ofproto *p) { struct ofport *ofport; int old_min = p->min_mtu; p->min_mtu = find_min_mtu(p); if (p->min_mtu == old_min) { return; } HMAP_FOR_EACH (ofport, hmap_node, &p->ports) { struct netdev *netdev = ofport->netdev; if (ofport_is_mtu_overridden(p, ofport)) { if (!netdev_set_mtu(netdev, p->min_mtu)) { ofport->mtu = p->min_mtu; } } } } static void ofproto_rule_destroy__(struct rule *rule) OVS_NO_THREAD_SAFETY_ANALYSIS { cls_rule_destroy(CONST_CAST(struct cls_rule *, &rule->cr)); rule_actions_destroy(rule_get_actions(rule)); ovs_mutex_destroy(&rule->mutex); /* ofproto_unref() must be called first. It is possible because ofproto * destruction is deferred by an RCU grace period. */ ofproto_unref(rule->ofproto); rule->ofproto->ofproto_class->rule_dealloc(rule); } static void rule_destroy_cb(struct rule *rule) OVS_NO_THREAD_SAFETY_ANALYSIS { /* Send rule removed if needed. */ if (rule->flags & OFPUTIL_FF_SEND_FLOW_REM && rule->removed_reason != OVS_OFPRR_NONE && !rule_is_hidden(rule)) { ofproto_rule_send_removed(rule); } rule->ofproto->ofproto_class->rule_destruct(rule); mf_vl_mff_unref(&rule->ofproto->vl_mff_map, rule->match_tlv_bitmap); mf_vl_mff_unref(&rule->ofproto->vl_mff_map, rule->ofpacts_tlv_bitmap); ofproto_rule_destroy__(rule); } void ofproto_rule_ref(struct rule *rule) { if (rule) { ovs_refcount_ref(&rule->ref_count); } } bool ofproto_rule_try_ref(struct rule *rule) { if (rule) { return ovs_refcount_try_ref_rcu(&rule->ref_count); } return false; } /* Decrements 'rule''s ref_count and schedules 'rule' to be destroyed if the * ref_count reaches 0. * * Use of RCU allows short term use (between RCU quiescent periods) without * keeping a reference. A reference must be taken if the rule needs to * stay around accross the RCU quiescent periods. */ void ofproto_rule_unref(struct rule *rule) { if (rule && ovs_refcount_unref_relaxed(&rule->ref_count) == 1) { ovs_assert(rule->state != RULE_INSERTED); ovsrcu_postpone(rule_destroy_cb, rule); } } static void remove_rule_rcu__(struct rule *rule) OVS_REQUIRES(ofproto_mutex) { struct ofproto *ofproto = rule->ofproto; struct oftable *table = &ofproto->tables[rule->table_id]; ovs_assert(!cls_rule_visible_in_version(&rule->cr, OVS_VERSION_MAX)); classifier_remove_assert(&table->cls, &rule->cr); if (ofproto->ofproto_class->rule_delete) { ofproto->ofproto_class->rule_delete(rule); } ofproto_rule_unref(rule); } static void remove_rule_rcu(struct rule *rule) OVS_EXCLUDED(ofproto_mutex) { ovs_mutex_lock(&ofproto_mutex); remove_rule_rcu__(rule); ovs_mutex_unlock(&ofproto_mutex); } /* Removes and deletes rules from a NULL-terminated array of rule pointers. */ static void remove_rules_rcu(struct rule **rules) OVS_EXCLUDED(ofproto_mutex) { struct rule **orig_rules = rules; if (*rules) { struct ofproto *ofproto = rules[0]->ofproto; unsigned long tables[BITMAP_N_LONGS(256)]; struct rule *rule; size_t table_id; memset(tables, 0, sizeof tables); ovs_mutex_lock(&ofproto_mutex); while ((rule = *rules++)) { /* Defer once for each new table. This defers the subtable cleanup * until later, so that when removing large number of flows the * operation is faster. */ if (!bitmap_is_set(tables, rule->table_id)) { struct classifier *cls = &ofproto->tables[rule->table_id].cls; bitmap_set1(tables, rule->table_id); classifier_defer(cls); } remove_rule_rcu__(rule); } BITMAP_FOR_EACH_1(table_id, 256, tables) { struct classifier *cls = &ofproto->tables[table_id].cls; classifier_publish(cls); } ovs_mutex_unlock(&ofproto_mutex); } free(orig_rules); } void ofproto_group_ref(struct ofgroup *group) { if (group) { ovs_refcount_ref(&group->ref_count); } } bool ofproto_group_try_ref(struct ofgroup *group) { if (group) { return ovs_refcount_try_ref_rcu(&group->ref_count); } return false; } static void group_destroy_cb(struct ofgroup *group) { group->ofproto->ofproto_class->group_destruct(group); ofputil_group_properties_destroy(CONST_CAST(struct ofputil_group_props *, &group->props)); ofputil_bucket_list_destroy(CONST_CAST(struct ovs_list *, &group->buckets)); /* ofproto_unref() must be called first. It is possible because ofproto * destruction is deferred by an RCU grace period. */ ofproto_unref(group->ofproto); group->ofproto->ofproto_class->group_dealloc(group); } void ofproto_group_unref(struct ofgroup *group) OVS_NO_THREAD_SAFETY_ANALYSIS { if (group && ovs_refcount_unref_relaxed(&group->ref_count) == 1) { ovs_assert(rule_collection_n(&group->rules) == 0); ovsrcu_postpone(group_destroy_cb, group); } } static void remove_group_rcu__(struct ofgroup *group) OVS_REQUIRES(ofproto_mutex) { struct ofproto *ofproto = group->ofproto; ovs_assert(!versions_visible_in_version(&group->versions, OVS_VERSION_MAX)); cmap_remove(&ofproto->groups, &group->cmap_node, hash_int(group->group_id, 0)); ofproto_group_unref(group); } static void remove_group_rcu(struct ofgroup *group) OVS_EXCLUDED(ofproto_mutex) { ovs_mutex_lock(&ofproto_mutex); remove_group_rcu__(group); ovs_mutex_unlock(&ofproto_mutex); } /* Removes and deletes groups from a NULL-terminated array of group * pointers. */ static void remove_groups_rcu(struct ofgroup **groups) OVS_EXCLUDED(ofproto_mutex) { ovs_mutex_lock(&ofproto_mutex); for (struct ofgroup **g = groups; *g; g++) { remove_group_rcu__(*g); } ovs_mutex_unlock(&ofproto_mutex); free(groups); } static bool ofproto_fix_meter_action(const struct ofproto *, struct ofpact_meter *); static bool ofproto_fix_controller_action(const struct ofproto *, struct ofpact_controller *); /* Creates and returns a new 'struct rule_actions', whose actions are a copy * of from the 'ofpacts_len' bytes of 'ofpacts'. */ const struct rule_actions * rule_actions_create(const struct ofpact *ofpacts, size_t ofpacts_len) { struct rule_actions *actions; actions = xmalloc(sizeof *actions + ofpacts_len); actions->ofpacts_len = ofpacts_len; memcpy(actions->ofpacts, ofpacts, ofpacts_len); actions->has_meter = ofpacts_get_meter(ofpacts, ofpacts_len) != 0; actions->has_groups = (ofpact_find_type_flattened(ofpacts, OFPACT_GROUP, ofpact_end(ofpacts, ofpacts_len)) != NULL); actions->has_learn_with_delete = (next_learn_with_delete(actions, NULL) != NULL); return actions; } /* Free the actions after the RCU quiescent period is reached. */ void rule_actions_destroy(const struct rule_actions *actions) { if (actions) { ovsrcu_postpone(free, CONST_CAST(struct rule_actions *, actions)); } } /* Returns true if 'rule' has an OpenFlow OFPAT_OUTPUT or OFPAT_ENQUEUE action * that outputs to 'port' (output to OFPP_FLOOD and OFPP_ALL doesn't count). */ bool ofproto_rule_has_out_port(const struct rule *rule, ofp_port_t port) OVS_REQUIRES(ofproto_mutex) { if (port == OFPP_ANY) { return true; } else { const struct rule_actions *actions = rule_get_actions(rule); return ofpacts_output_to_port(actions->ofpacts, actions->ofpacts_len, port); } } /* Returns true if 'rule' has group and equals group_id. */ bool ofproto_rule_has_out_group(const struct rule *rule, uint32_t group_id) OVS_REQUIRES(ofproto_mutex) { if (group_id == OFPG_ANY) { return true; } else { const struct rule_actions *actions = rule_get_actions(rule); return ofpacts_output_to_group(actions->ofpacts, actions->ofpacts_len, group_id); } } static bool rule_is_readonly(const struct rule *rule) { const struct oftable *table = &rule->ofproto->tables[rule->table_id]; return (table->flags & OFTABLE_READONLY) != 0; } static uint32_t hash_learned_cookie(ovs_be64 cookie_, uint8_t table_id) { uint64_t cookie = (OVS_FORCE uint64_t) cookie_; return hash_3words(cookie, cookie >> 32, table_id); } static void learned_cookies_update_one__(struct ofproto *ofproto, const struct ofpact_learn *learn, int delta, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex) { uint32_t hash = hash_learned_cookie(learn->cookie, learn->table_id); struct learned_cookie *c; HMAP_FOR_EACH_WITH_HASH (c, hmap_node, hash, &ofproto->learned_cookies) { if (c->cookie == learn->cookie && c->table_id == learn->table_id) { c->n += delta; ovs_assert(c->n >= 0); if (!c->n) { hmap_remove(&ofproto->learned_cookies, &c->hmap_node); ovs_list_push_back(dead_cookies, &c->list_node); } return; } } ovs_assert(delta > 0); c = xmalloc(sizeof *c); hmap_insert(&ofproto->learned_cookies, &c->hmap_node, hash); c->cookie = learn->cookie; c->table_id = learn->table_id; c->n = delta; } static const struct ofpact_learn * next_learn_with_delete(const struct rule_actions *actions, const struct ofpact_learn *start) { const struct ofpact *pos; for (pos = start ? ofpact_next(&start->ofpact) : actions->ofpacts; pos < ofpact_end(actions->ofpacts, actions->ofpacts_len); pos = ofpact_next(pos)) { if (pos->type == OFPACT_LEARN) { const struct ofpact_learn *learn = ofpact_get_LEARN(pos); if (learn->flags & NX_LEARN_F_DELETE_LEARNED) { return learn; } } } return NULL; } static void learned_cookies_update__(struct ofproto *ofproto, const struct rule_actions *actions, int delta, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex) { if (actions->has_learn_with_delete) { const struct ofpact_learn *learn; for (learn = next_learn_with_delete(actions, NULL); learn; learn = next_learn_with_delete(actions, learn)) { learned_cookies_update_one__(ofproto, learn, delta, dead_cookies); } } } static void learned_cookies_inc(struct ofproto *ofproto, const struct rule_actions *actions) OVS_REQUIRES(ofproto_mutex) { learned_cookies_update__(ofproto, actions, +1, NULL); } static void learned_cookies_dec(struct ofproto *ofproto, const struct rule_actions *actions, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex) { learned_cookies_update__(ofproto, actions, -1, dead_cookies); } static void learned_cookies_flush(struct ofproto *ofproto, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex) { struct learned_cookie *c; struct minimatch match; minimatch_init_catchall(&match); LIST_FOR_EACH_POP (c, list_node, dead_cookies) { struct rule_criteria criteria; struct rule_collection rules; rule_criteria_init(&criteria, c->table_id, &match, 0, OVS_VERSION_MAX, c->cookie, OVS_BE64_MAX, OFPP_ANY, OFPG_ANY); rule_criteria_require_rw(&criteria, false); collect_rules_loose(ofproto, &criteria, &rules); rule_criteria_destroy(&criteria); delete_flows__(&rules, OFPRR_DELETE, NULL); free(c); } minimatch_destroy(&match); } static enum ofperr handle_echo_request(struct ofconn *ofconn, const struct ofp_header *oh) { ofconn_send_reply(ofconn, ofputil_encode_echo_reply(oh)); return 0; } static void query_tables(struct ofproto *ofproto, struct ofputil_table_features **featuresp, struct ofputil_table_stats **statsp) { struct mf_bitmap rw_fields = oxm_writable_fields(); struct mf_bitmap match = oxm_matchable_fields(); struct mf_bitmap mask = oxm_maskable_fields(); struct ofputil_table_features *features; struct ofputil_table_stats *stats; int i; features = *featuresp = xcalloc(ofproto->n_tables, sizeof *features); for (i = 0; i < ofproto->n_tables; i++) { struct ofputil_table_features *f = &features[i]; f->table_id = i; f->name[0] = '\0'; f->metadata_match = OVS_BE64_MAX; f->metadata_write = OVS_BE64_MAX; atomic_read_relaxed(&ofproto->tables[i].miss_config, &f->miss_config); f->max_entries = 1000000; f->any_properties = true; bool more_tables = false; for (int j = i + 1; j < ofproto->n_tables; j++) { if (!(ofproto->tables[j].flags & OFTABLE_HIDDEN)) { bitmap_set1(f->nonmiss.next, j); more_tables = true; } } f->nonmiss.instructions = (1u << N_OVS_INSTRUCTIONS) - 1; if (!more_tables) { f->nonmiss.instructions &= ~(1u << OVSINST_OFPIT11_GOTO_TABLE); } f->nonmiss.write.ofpacts = (UINT64_C(1) << N_OFPACTS) - 1; f->nonmiss.write.set_fields = rw_fields; f->nonmiss.apply = f->nonmiss.write; f->miss = f->nonmiss; f->match = match; f->mask = mask; f->wildcard = match; } if (statsp) { stats = *statsp = xcalloc(ofproto->n_tables, sizeof *stats); for (i = 0; i < ofproto->n_tables; i++) { struct ofputil_table_stats *s = &stats[i]; s->table_id = i; s->active_count = ofproto->tables[i].n_flows; if (i == 0) { s->active_count -= connmgr_count_hidden_rules( ofproto->connmgr); } } } else { stats = NULL; } ofproto->ofproto_class->query_tables(ofproto, features, stats); for (i = 0; i < ofproto->n_tables; i++) { const struct oftable *table = &ofproto->tables[i]; struct ofputil_table_features *f = &features[i]; if (table->name) { ovs_strzcpy(f->name, table->name, sizeof f->name); } if (table->max_flows < f->max_entries) { f->max_entries = table->max_flows; } } } static void query_switch_features(struct ofproto *ofproto, bool *arp_match_ip, uint64_t *ofpacts) { struct ofputil_table_features *features, *f; *arp_match_ip = false; *ofpacts = 0; query_tables(ofproto, &features, NULL); for (f = features; f < &features[ofproto->n_tables]; f++) { *ofpacts |= f->nonmiss.apply.ofpacts | f->miss.apply.ofpacts; if (bitmap_is_set(f->match.bm, MFF_ARP_SPA) || bitmap_is_set(f->match.bm, MFF_ARP_TPA)) { *arp_match_ip = true; } } free(features); /* Sanity check. */ ovs_assert(*ofpacts & (UINT64_C(1) << OFPACT_OUTPUT)); } static enum ofperr handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_switch_features features; struct ofport *port; bool arp_match_ip; struct ofpbuf *b; query_switch_features(ofproto, &arp_match_ip, &features.ofpacts); features.datapath_id = ofproto->datapath_id; features.n_buffers = 0; features.n_tables = ofproto_get_n_visible_tables(ofproto); features.capabilities = (OFPUTIL_C_FLOW_STATS | OFPUTIL_C_TABLE_STATS | OFPUTIL_C_PORT_STATS | OFPUTIL_C_QUEUE_STATS | OFPUTIL_C_GROUP_STATS | OFPUTIL_C_BUNDLES); if (arp_match_ip) { features.capabilities |= OFPUTIL_C_ARP_MATCH_IP; } /* FIXME: Fill in proper features.auxiliary_id for auxiliary connections */ features.auxiliary_id = 0; b = ofputil_encode_switch_features(&features, ofconn_get_protocol(ofconn), oh->xid); HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) { ofputil_put_switch_features_port(&port->pp, b); } ofconn_send_reply(ofconn, b); return 0; } static enum ofperr handle_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofputil_switch_config config; config.frag = ofconn_get_ofproto(ofconn)->frag_handling; config.invalid_ttl_to_controller = ofconn_get_invalid_ttl_to_controller(ofconn); config.miss_send_len = ofconn_get_miss_send_len(ofconn); ofconn_send_reply(ofconn, ofputil_encode_get_config_reply(oh, &config)); return 0; } static enum ofperr handle_set_config(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_switch_config config; enum ofperr error; error = ofputil_decode_set_config(oh, &config); if (error) { return error; } if (ofconn_get_type(ofconn) != OFCONN_PRIMARY || ofconn_get_role(ofconn) != OFPCR12_ROLE_SECONDARY) { enum ofputil_frag_handling cur = ofproto->frag_handling; enum ofputil_frag_handling next = config.frag; if (cur != next) { if (ofproto->ofproto_class->set_frag_handling(ofproto, next)) { ofproto->frag_handling = next; } else { VLOG_WARN_RL(&rl, "%s: unsupported fragment handling mode %s", ofproto->name, ofputil_frag_handling_to_string(next)); } } } if (config.invalid_ttl_to_controller >= 0) { ofconn_set_invalid_ttl_to_controller(ofconn, config.invalid_ttl_to_controller); } ofconn_set_miss_send_len(ofconn, config.miss_send_len); return 0; } /* Checks whether 'ofconn' is a secondary controller. If so, returns an * OpenFlow error message code for the caller to propagate upward. Otherwise, * returns 0. * * The log message mentions 'msg_type'. */ static enum ofperr reject_secondary_controller(struct ofconn *ofconn) { if (ofconn_get_role(ofconn) == OFPCR12_ROLE_SECONDARY) { return OFPERR_OFPBRC_IS_SECONDARY; } else { return 0; } } /* Checks that the 'ofpacts_len' bytes of action in 'ofpacts' are appropriate * for 'ofproto': * * - If they use a meter, then 'ofproto' has that meter configured. * Updates the meter action with ofproto's datapath's provider_meter_id. * * - If they use any groups, then 'ofproto' has that group configured. * * Returns 0 if successful, otherwise an OpenFlow error. Caller must hold * 'ofproto_mutex' for the result to be valid also after this function * returns. */ enum ofperr ofproto_check_ofpacts(struct ofproto *ofproto, const struct ofpact ofpacts[], size_t ofpacts_len) OVS_REQUIRES(ofproto_mutex) { const struct ofpact *a; OFPACT_FOR_EACH_FLATTENED (a, ofpacts, ofpacts_len) { if (a->type == OFPACT_METER && !ofproto_fix_meter_action(ofproto, ofpact_get_METER(a))) { return OFPERR_OFPMMFC_INVALID_METER; } if (a->type == OFPACT_CONTROLLER) { struct ofpact_controller *ca = ofpact_get_CONTROLLER(a); if (!ofproto_fix_controller_action(ofproto, ca)) { static struct vlog_rate_limit rl2 = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_INFO_RL(&rl2, "%s: controller action specified an " "unknown meter id: %d", ofproto->name, ca->meter_id); } } if (a->type == OFPACT_GROUP && !ofproto_group_exists(ofproto, ofpact_get_GROUP(a)->group_id)) { return OFPERR_OFPBAC_BAD_OUT_GROUP; } } return 0; } void ofproto_packet_out_uninit(struct ofproto_packet_out *opo) { dp_packet_delete(opo->packet); opo->packet = NULL; free(opo->flow); opo->flow = NULL; free(opo->ofpacts); opo->ofpacts = NULL; opo->ofpacts_len = 0; ovs_assert(!opo->aux); } /* Takes ownership of po->ofpacts, which must have been malloc'ed. */ static enum ofperr ofproto_packet_out_init(struct ofproto *ofproto, struct ofconn *ofconn, struct ofproto_packet_out *opo, const struct ofputil_packet_out *po) { enum ofperr error; struct match match; struct { struct miniflow mf; uint64_t buf[FLOW_U64S]; } m; uint16_t in_port = ofp_to_u16(po->flow_metadata.flow.in_port.ofp_port); if (in_port >= ofproto->max_ports && in_port < ofp_to_u16(OFPP_MAX)) { return OFPERR_OFPBRC_BAD_PORT; } /* Get payload. */ if (po->buffer_id != UINT32_MAX) { return OFPERR_OFPBRC_BUFFER_UNKNOWN; } /* Ensure that the L3 header is 32-bit aligned. */ opo->packet = dp_packet_clone_data_with_headroom(po->packet, po->packet_len, 2); /* Take the received packet_tpye as packet_type of the packet. */ opo->packet->packet_type = po->flow_metadata.flow.packet_type; /* Store struct flow. */ opo->flow = xmalloc(sizeof *opo->flow); *opo->flow = po->flow_metadata.flow; miniflow_extract(opo->packet, &m.mf); flow_union_with_miniflow(opo->flow, &m.mf); /* Check actions like for flow mods. We pass a 'table_id' of 0 to * ofproto_check_consistency(), which isn't strictly correct because these * actions aren't in any table. This is OK as 'table_id' is only used to * check instructions (e.g., goto-table), which can't appear on the action * list of a packet-out. */ match_wc_init(&match, opo->flow); struct ofpact_check_params cp = { .match = &match, .max_ports = u16_to_ofp(ofproto->max_ports), .table_id = 0, .n_tables = ofproto->n_tables }; error = ofpacts_check_consistency(po->ofpacts, po->ofpacts_len, ofconn_get_protocol(ofconn), &cp); if (error) { dp_packet_delete(opo->packet); free(opo->flow); return error; } opo->ofpacts = po->ofpacts; opo->ofpacts_len = po->ofpacts_len; opo->aux = NULL; return 0; } static enum ofperr ofproto_packet_out_start(struct ofproto *ofproto, struct ofproto_packet_out *opo) OVS_REQUIRES(ofproto_mutex) { enum ofperr error; error = ofproto_check_ofpacts(ofproto, opo->ofpacts, opo->ofpacts_len); if (error) { return error; } return ofproto->ofproto_class->packet_xlate(ofproto, opo); } static void ofproto_packet_out_revert(struct ofproto *ofproto, struct ofproto_packet_out *opo) OVS_REQUIRES(ofproto_mutex) { ofproto->ofproto_class->packet_xlate_revert(ofproto, opo); } static void ofproto_packet_out_prepare(struct ofproto *ofproto, struct ofproto_packet_out *opo) OVS_REQUIRES(ofproto_mutex) { ofproto->ofproto_class->packet_execute_prepare(ofproto, opo); } /* Execution of packet_out action in datapath could end up in upcall with * subsequent flow translations and possible rule modifications. * So, the caller should not hold 'ofproto_mutex'. */ static void ofproto_packet_out_finish(struct ofproto *ofproto, struct ofproto_packet_out *opo) OVS_EXCLUDED(ofproto_mutex) { ofproto->ofproto_class->packet_execute(ofproto, opo); } static enum ofperr handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *p = ofconn_get_ofproto(ofconn); struct ofputil_packet_out po; struct ofproto_packet_out opo; uint64_t ofpacts_stub[1024 / 8]; struct ofpbuf ofpacts; enum ofperr error; COVERAGE_INC(ofproto_packet_out); error = reject_secondary_controller(ofconn); if (error) { return error; } /* Decode message. */ ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub); error = ofputil_decode_packet_out(&po, oh, ofproto_get_tun_tab(p), &ofpacts); if (error) { ofpbuf_uninit(&ofpacts); return error; } po.ofpacts = ofpbuf_steal_data(&ofpacts); /* Move to heap. */ error = ofproto_packet_out_init(p, ofconn, &opo, &po); if (error) { free(po.ofpacts); return error; } ovs_mutex_lock(&ofproto_mutex); opo.version = p->tables_version; error = ofproto_packet_out_start(p, &opo); if (!error) { ofproto_packet_out_prepare(p, &opo); } ovs_mutex_unlock(&ofproto_mutex); if (!error) { ofproto_packet_out_finish(p, &opo); } ofproto_packet_out_uninit(&opo); return error; } static enum ofperr handle_nxt_resume(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_packet_in_private pin; enum ofperr error; error = ofputil_decode_packet_in_private(oh, false, ofproto_get_tun_tab(ofproto), &ofproto->vl_mff_map, &pin, NULL, NULL); if (error) { return error; } error = (ofproto->ofproto_class->nxt_resume ? ofproto->ofproto_class->nxt_resume(ofproto, &pin) : OFPERR_NXR_NOT_SUPPORTED); ofputil_packet_in_private_destroy(&pin); return error; } static void update_port_config(struct ofconn *ofconn, struct ofport *port, enum ofputil_port_config config, enum ofputil_port_config mask) { enum ofputil_port_config toggle = (config ^ port->pp.config) & mask; if (toggle & OFPUTIL_PC_PORT_DOWN && (config & OFPUTIL_PC_PORT_DOWN ? netdev_turn_flags_off(port->netdev, NETDEV_UP, NULL) : netdev_turn_flags_on(port->netdev, NETDEV_UP, NULL))) { /* We tried to bring the port up or down, but it failed, so don't * update the "down" bit. */ toggle &= ~OFPUTIL_PC_PORT_DOWN; } if (toggle) { struct ofputil_phy_port old_pp = port->pp; port->pp.config ^= toggle; port->pp.state = normalize_state(port->pp.config, port->pp.state, port->may_enable); port->ofproto->ofproto_class->port_reconfigured(port, old_pp.config); connmgr_send_port_status(port->ofproto->connmgr, ofconn, &old_pp, &port->pp, OFPPR_MODIFY); } } static enum ofperr port_mod_start(struct ofconn *ofconn, struct ofputil_port_mod *pm, struct ofport **port) { struct ofproto *p = ofconn_get_ofproto(ofconn); *port = ofproto_get_port(p, pm->port_no); if (!*port) { return OFPERR_OFPPMFC_BAD_PORT; } if (!eth_addr_equals((*port)->pp.hw_addr, pm->hw_addr)) { return OFPERR_OFPPMFC_BAD_HW_ADDR; } return 0; } static void port_mod_finish(struct ofconn *ofconn, struct ofputil_port_mod *pm, struct ofport *port) { update_port_config(ofconn, port, pm->config, pm->mask); if (pm->advertise) { netdev_set_advertisements(port->netdev, pm->advertise); } } static enum ofperr handle_port_mod(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofputil_port_mod pm; struct ofport *port; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } error = ofputil_decode_port_mod(oh, &pm, false); if (error) { return error; } error = port_mod_start(ofconn, &pm, &port); if (!error) { port_mod_finish(ofconn, &pm, port); } return error; } static enum ofperr handle_desc_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { static const char *default_mfr_desc = "Nicira, Inc."; static const char *default_hw_desc = "Open vSwitch"; static const char *default_sw_desc = VERSION; static const char *default_serial_desc = "None"; static const char *default_dp_desc = "None"; struct ofproto *p = ofconn_get_ofproto(ofconn); struct ofp_desc_stats *ods; struct ofpbuf *msg; msg = ofpraw_alloc_stats_reply(request, 0); ods = ofpbuf_put_zeros(msg, sizeof *ods); ovs_strlcpy(ods->mfr_desc, p->mfr_desc ? p->mfr_desc : default_mfr_desc, sizeof ods->mfr_desc); ovs_strlcpy(ods->hw_desc, p->hw_desc ? p->hw_desc : default_hw_desc, sizeof ods->hw_desc); ovs_strlcpy(ods->sw_desc, p->sw_desc ? p->sw_desc : default_sw_desc, sizeof ods->sw_desc); ovs_strlcpy(ods->serial_num, p->serial_desc ? p->serial_desc : default_serial_desc, sizeof ods->serial_num); ovs_strlcpy(ods->dp_desc, p->dp_desc ? p->dp_desc : default_dp_desc, sizeof ods->dp_desc); ofconn_send_reply(ofconn, msg); return 0; } static enum ofperr handle_table_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_table_features *features; struct ofputil_table_stats *stats; struct ofpbuf *reply; size_t i; query_tables(ofproto, &features, &stats); reply = ofputil_encode_table_stats_reply(request); for (i = 0; i < ofproto->n_tables; i++) { if (!(ofproto->tables[i].flags & OFTABLE_HIDDEN)) { ofputil_append_table_stats_reply(reply, &stats[i], &features[i]); } } ofconn_send_reply(ofconn, reply); free(features); free(stats); return 0; } /* OpenFlow 1.5.1 section 7.3.5.18.1 "Table Features request and reply" * says: * * If a table feature included in the request has an empty list of * properties, the list of properties for that flow table is unchanged and * only the other features of that flow table are updated. * * This function copies the "list of properties" from '*src' to '*dst'. */ static void copy_properties(struct ofputil_table_features *dst, const struct ofputil_table_features *src) { dst->any_properties = src->any_properties; if (src->any_properties) { dst->nonmiss = src->nonmiss; dst->miss = src->miss; dst->match = src->match; dst->mask = src->mask; dst->wildcard = src->wildcard; } } /* Attempts to change the table features of the ofproto backing 'ofconn' to * those specified in the table features request in 'msgs', given that the * features are currently those in 'old'. * * Returns 0 if successful, an OpenFlow error if the caller should send an * error message for the request as a whole, or -1 if the function already sent * an error message for some message in 'msgs'. */ static int handle_table_features_change(struct ofconn *ofconn, const struct ovs_list *msgs, const struct ofputil_table_features old[]) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); enum ofp15_table_features_command command = OFPTFC15_REPLACE; struct ofputil_table_features new[255]; unsigned long int seen[BITMAP_N_LONGS(255)]; memset(seen, 0, sizeof seen); struct ofpbuf *msg; int n = 0; LIST_FOR_EACH (msg, list_node, msgs) { for (;;) { struct ofputil_table_features tf; int retval = ofputil_decode_table_features(msg, &tf, NULL); if (retval == EOF) { break; } else if (retval) { ofconn_send_error(ofconn, msg->header, retval); return -1; } /* Get command from first request. */ if (!n) { command = tf.command; } n++; /* Avoid duplicate tables. */ if (bitmap_is_set(seen, tf.table_id)) { VLOG_INFO_RL(&rl, "duplicate table %"PRIu8, tf.table_id); ofconn_send_error(ofconn, msg->header, OFPERR_NXTFFC_DUP_TABLE); return -1; } bitmap_set1(seen, tf.table_id); /* Save table. */ new[tf.table_id] = tf; } } if (!n) { return 0; } for (size_t i = 0; i < ofproto->n_tables; i++) { if (ofproto->tables[i].flags & OFTABLE_HIDDEN) { if (bitmap_is_set(seen, i)) { VLOG_INFO_RL(&rl, "can't modify hidden table %"PRIuSIZE, i); return OFPERR_OFPTFFC_EPERM; } new[i] = old[i]; bitmap_set1(seen, i); } } switch (command) { case OFPTFC15_REPLACE: break; case OFPTFC15_MODIFY: for (size_t i = 0; i < ofproto->n_tables; i++) { if (!bitmap_is_set(seen, i)) { new[i] = old[i]; bitmap_set1(seen, i); } else if (!new[i].any_properties) { copy_properties(&new[i], &old[i]); } } break; case OFPTFC15_ENABLE: case OFPTFC15_DISABLE: /* It really isn't clear what these commands are supposed to do in an * Open vSwitch context. OVS doesn't have a concept of tables that * exist but are not in the pipeline, and OVS table ids are always * sequential from 0. */ return OFPERR_OFPTFFC_EPERM; } /* Make sure that the new number of tables is the same as the old number, * because we don't support changing the number of tables or disabling * tables. */ int n_tables = bitmap_scan(seen, 0, 0, 255); bool skipped_tables = bitmap_scan(seen, 1, n_tables, 255) != 255; if (n_tables != ofproto->n_tables || skipped_tables) { if (skipped_tables) { VLOG_INFO_RL(&rl, "can't disable table %d", n_tables); } else { VLOG_INFO_RL(&rl, "can't change number of tables from %d to %d", ofproto->n_tables, n_tables); } return (n_tables > ofproto->n_tables ? OFPERR_OFPTFFC_TOO_MANY : OFPERR_OFPTFFC_EPERM); } /* OpenFlow 1.5.1 section 7.3.5.18.1 "Table Features request and reply" * says: * * "All fields in ofp_table_features may be requested to be changed by * the controller with the exception of the max_entries field, this is * read only and returned by the switch." * * so forbid the controller from attempting to change it. * * (This seems like a particularly arbitrary prohibition since OVS could * easily implement such a feature. Whatever.) */ for (size_t i = 0; i < n_tables; i++) { if (old[i].max_entries != new[i].max_entries) { VLOG_INFO_RL(&rl, "can't change max_entries"); return OFPERR_OFPTFFC_EPERM; } } /* Check that we can set table names. */ for (size_t i = 0; i < n_tables; i++) { if (!oftable_may_set_name(&ofproto->tables[i], new[i].name, 1)) { const char *name = ofproto->tables[i].name; VLOG_INFO_RL(&rl, "can't change name of table %"PRIuSIZE" " "to %s because it is already set to %s via OVSDB", i, new[i].name, name ? name : "\"\""); return OFPERR_OFPTFFC_EPERM; } } /* Ask the provider to update its features. * * If the provider can't update features, just make sure that the * controller isn't asking to enable new features. OpenFlow says it's OK * if a superset of the requested features are actually enabled. */ if (ofproto->ofproto_class->modify_tables) { enum ofperr error = ofproto->ofproto_class->modify_tables(ofproto, old, new); if (error) { VLOG_INFO_RL(&rl, "can't change table features"); return error; } } else { for (size_t i = 0; i < n_tables; i++) { if (!ofputil_table_features_are_superset(&old[i], &new[i])) { VLOG_INFO_RL(&rl, "can't increase table features " "for table %"PRIuSIZE, i); return OFPERR_OFPTFFC_EPERM; } } } /* Update table names. */ for (size_t i = 0; i < n_tables; i++) { oftable_set_name(&ofproto->tables[i], new[i].name, 1); } return 0; } static void handle_table_features_request(struct ofconn *ofconn, const struct ovs_list *msgs) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofpbuf *msg = ofpbuf_from_list(ovs_list_back(msgs)); const struct ofp_header *request = msg->data; ofpraw_pull_assert(msg); /* Update the table features configuration, if requested. */ struct ofputil_table_features *features; query_tables(ofproto, &features, NULL); if (!ovs_list_is_singleton(msgs) || msg->size) { int retval = handle_table_features_change(ofconn, msgs, features); free(features); if (retval) { if (retval < 0) { /* handle_table_features_change() already sent an error. */ } else { ofconn_send_error(ofconn, request, retval); } return; } /* Features may have changed, re-query. */ query_tables(ofproto, &features, NULL); } /* Reply the controller with the table configuration. */ struct ovs_list replies; ofpmp_init(&replies, request); for (size_t i = 0; i < ofproto->n_tables; i++) { if (!(ofproto->tables[i].flags & OFTABLE_HIDDEN)) { ofputil_append_table_features(&features[i], NULL, &replies); } } ofconn_send_replies(ofconn, &replies); free(features); } /* Returns the vacancy of 'oftable', a number that ranges from 0 (if the table * is full) to 100 (if the table is empty). * * A table without a limit on flows is considered to be empty. */ static uint8_t oftable_vacancy(const struct oftable *t) { return (!t->max_flows ? 100 : t->n_flows >= t->max_flows ? 0 : (t->max_flows - t->n_flows) * 100.0 / t->max_flows); } static void query_table_desc__(struct ofputil_table_desc *td, struct ofproto *ofproto, uint8_t table_id) { const struct oftable *t = &ofproto->tables[table_id]; td->table_id = table_id; td->eviction = (t->eviction & EVICTION_OPENFLOW ? OFPUTIL_TABLE_EVICTION_ON : OFPUTIL_TABLE_EVICTION_OFF); td->eviction_flags = OFPROTO_EVICTION_FLAGS; td->vacancy = (t->vacancy_event ? OFPUTIL_TABLE_VACANCY_ON : OFPUTIL_TABLE_VACANCY_OFF); td->table_vacancy.vacancy_down = t->vacancy_down; td->table_vacancy.vacancy_up = t->vacancy_up; td->table_vacancy.vacancy = oftable_vacancy(t); } /* This function queries the database for dumping table-desc. */ static void query_tables_desc(struct ofproto *ofproto, struct ofputil_table_desc **descp) { struct ofputil_table_desc *table_desc; size_t i; table_desc = *descp = xcalloc(ofproto->n_tables, sizeof *table_desc); for (i = 0; i < ofproto->n_tables; i++) { struct ofputil_table_desc *td = &table_desc[i]; query_table_desc__(td, ofproto, i); } } /* Function to handle dump-table-desc request. */ static enum ofperr handle_table_desc_request(struct ofconn *ofconn, const struct ofp_header *request) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_table_desc *table_desc; struct ovs_list replies; size_t i; query_tables_desc(ofproto, &table_desc); ofpmp_init(&replies, request); for (i = 0; i < ofproto->n_tables; i++) { if (!(ofproto->tables[i].flags & OFTABLE_HIDDEN)) { ofputil_append_table_desc_reply(&table_desc[i], &replies, request->version); } } ofconn_send_replies(ofconn, &replies); free(table_desc); return 0; } /* This function determines and sends the vacancy event, based on the value * of current vacancy and threshold vacancy. If the current vacancy is less * than or equal to vacancy_down, vacancy up events must be enabled, and when * the current vacancy is greater or equal to vacancy_up, vacancy down events * must be enabled. */ static void send_table_status(struct ofproto *ofproto, uint8_t table_id) { struct oftable *t = &ofproto->tables[table_id]; if (!t->vacancy_event) { return; } uint8_t vacancy = oftable_vacancy(t); enum ofp14_table_reason event; if (vacancy < t->vacancy_down) { event = OFPTR_VACANCY_DOWN; } else if (vacancy > t->vacancy_up) { event = OFPTR_VACANCY_UP; } else { return; } if (event == t->vacancy_event) { struct ofputil_table_desc td; query_table_desc__(&td, ofproto, table_id); connmgr_send_table_status(ofproto->connmgr, &td, event); t->vacancy_event = (event == OFPTR_VACANCY_DOWN ? OFPTR_VACANCY_UP : OFPTR_VACANCY_DOWN); } } static void append_port_stat(struct ofport *port, struct ovs_list *replies) { struct ofputil_port_stats ops = { .port_no = port->pp.port_no }; calc_duration(port->created, time_msec(), &ops.duration_sec, &ops.duration_nsec); /* Intentionally ignore return value, since errors will set * 'stats' to all-1s, which is correct for OpenFlow, and * netdev_get_stats() will log errors. */ ofproto_port_get_stats(port, &ops.stats); netdev_get_custom_stats(port->netdev, &ops.custom_stats); ofputil_append_port_stat(replies, &ops); netdev_free_custom_stats_counters(&ops.custom_stats); } static void handle_port_request(struct ofconn *ofconn, const struct ofp_header *request, ofp_port_t port_no, void (*cb)(struct ofport *, struct ovs_list *replies)) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofport *port; struct ovs_list replies; ofpmp_init(&replies, request); if (port_no != OFPP_ANY) { port = ofproto_get_port(ofproto, port_no); if (port) { cb(port, &replies); } } else { HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) { cb(port, &replies); } } ofconn_send_replies(ofconn, &replies); } static enum ofperr handle_port_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { ofp_port_t port_no; enum ofperr error; error = ofputil_decode_port_stats_request(request, &port_no); if (!error) { handle_port_request(ofconn, request, port_no, append_port_stat); } return error; } static void append_port_desc(struct ofport *port, struct ovs_list *replies) { ofputil_append_port_desc_stats_reply(&port->pp, replies); } static enum ofperr handle_port_desc_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { ofp_port_t port_no; enum ofperr error; error = ofputil_decode_port_desc_stats_request(request, &port_no); if (!error) { handle_port_request(ofconn, request, port_no, append_port_desc); } return error; } static uint32_t hash_cookie(ovs_be64 cookie) { return hash_uint64((OVS_FORCE uint64_t)cookie); } static void cookies_insert(struct ofproto *ofproto, struct rule *rule) OVS_REQUIRES(ofproto_mutex) { hindex_insert(&ofproto->cookies, &rule->cookie_node, hash_cookie(rule->flow_cookie)); } static void cookies_remove(struct ofproto *ofproto, struct rule *rule) OVS_REQUIRES(ofproto_mutex) { hindex_remove(&ofproto->cookies, &rule->cookie_node); } static void calc_duration(long long int start, long long int now, uint32_t *sec, uint32_t *nsec) { long long int msecs = now - start; *sec = msecs / 1000; *nsec = (msecs % 1000) * (1000 * 1000); } /* Checks whether 'table_id' is 0xff or a valid table ID in 'ofproto'. Returns * true if 'table_id' is OK, false otherwise. */ static bool check_table_id(const struct ofproto *ofproto, uint8_t table_id) { return table_id == OFPTT_ALL || table_id < ofproto->n_tables; } static struct oftable * next_visible_table(const struct ofproto *ofproto, uint8_t table_id) { struct oftable *table; for (table = &ofproto->tables[table_id]; table < &ofproto->tables[ofproto->n_tables]; table++) { if (!(table->flags & OFTABLE_HIDDEN)) { return table; } } return NULL; } static struct oftable * first_matching_table(const struct ofproto *ofproto, uint8_t table_id) { if (table_id == 0xff) { return next_visible_table(ofproto, 0); } else if (table_id < ofproto->n_tables) { return &ofproto->tables[table_id]; } else { return NULL; } } static struct oftable * next_matching_table(const struct ofproto *ofproto, const struct oftable *table, uint8_t table_id) { return (table_id == 0xff ? next_visible_table(ofproto, (table - ofproto->tables) + 1) : NULL); } /* Assigns TABLE to each oftable, in turn, that matches TABLE_ID in OFPROTO: * * - If TABLE_ID is 0xff, this iterates over every classifier table in * OFPROTO, skipping tables marked OFTABLE_HIDDEN. * * - If TABLE_ID is the number of a table in OFPROTO, then the loop iterates * only once, for that table. (This can be used to access tables marked * OFTABLE_HIDDEN.) * * - Otherwise, TABLE_ID isn't valid for OFPROTO, so the loop won't be * entered at all. (Perhaps you should have validated TABLE_ID with * check_table_id().) * * All parameters are evaluated multiple times. */ #define FOR_EACH_MATCHING_TABLE(TABLE, TABLE_ID, OFPROTO) \ for ((TABLE) = first_matching_table(OFPROTO, TABLE_ID); \ (TABLE) != NULL; \ (TABLE) = next_matching_table(OFPROTO, TABLE, TABLE_ID)) /* Initializes 'criteria' in a straightforward way based on the other * parameters. * * By default, the criteria include flows that are read-only, on the assumption * that the collected flows won't be modified. Call rule_criteria_require_rw() * if flows will be modified. * * For "loose" matching, the 'priority' parameter is unimportant and may be * supplied as 0. */ static void rule_criteria_init(struct rule_criteria *criteria, uint8_t table_id, const struct minimatch *match, int priority, ovs_version_t version, ovs_be64 cookie, ovs_be64 cookie_mask, ofp_port_t out_port, uint32_t out_group) { criteria->table_id = table_id; cls_rule_init_from_minimatch(&criteria->cr, match, priority); criteria->version = version; criteria->cookie = cookie; criteria->cookie_mask = cookie_mask; criteria->out_port = out_port; criteria->out_group = out_group; /* We ordinarily want to skip hidden rules, but there has to be a way for * code internal to OVS to modify and delete them, so if the criteria * specify a priority that can only be for a hidden flow, then allow hidden * rules to be selected. (This doesn't allow OpenFlow clients to meddle * with hidden flows because OpenFlow uses only a 16-bit field to specify * priority.) */ criteria->include_hidden = priority > UINT16_MAX; /* We assume that the criteria are being used to collect flows for reading * but not modification. Thus, we should collect read-only flows. */ criteria->include_readonly = true; } /* By default, criteria initialized by rule_criteria_init() will match flows * that are read-only, on the assumption that the collected flows won't be * modified. Call this function to match only flows that are be modifiable. * * Specify 'can_write_readonly' as false in ordinary circumstances, true if the * caller has special privileges that allow it to modify even "read-only" * flows. */ static void rule_criteria_require_rw(struct rule_criteria *criteria, bool can_write_readonly) { criteria->include_readonly = can_write_readonly; } static void rule_criteria_destroy(struct rule_criteria *criteria) { cls_rule_destroy(&criteria->cr); criteria->version = OVS_VERSION_NOT_REMOVED; /* Mark as destroyed. */ } /* Adds rules to the 'to_remove' collection, so they can be destroyed * later all together. Destroys 'rules'. */ static void rules_mark_for_removal(struct ofproto *ofproto, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, rules) { rule_collection_add(ofproto->to_remove, rule); } rule_collection_destroy(rules); } /* Schedules postponed removal of rules, destroys 'rules'. */ static void remove_rules_postponed(struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { if (rule_collection_n(rules) > 0) { if (rule_collection_n(rules) == 1) { ovsrcu_postpone(remove_rule_rcu, rule_collection_rules(rules)[0]); rule_collection_init(rules); } else { ovsrcu_postpone(remove_rules_rcu, rule_collection_detach(rules)); } } } /* Schedules postponed removal of groups, destroys 'groups'. */ static void remove_groups_postponed(struct group_collection *groups) OVS_REQUIRES(ofproto_mutex) { if (group_collection_n(groups) > 0) { if (group_collection_n(groups) == 1) { ovsrcu_postpone(remove_group_rcu, group_collection_groups(groups)[0]); group_collection_init(groups); } else { ovsrcu_postpone(remove_groups_rcu, group_collection_detach(groups)); } } } /* Checks whether 'rule' matches 'c' and, if so, adds it to 'rules'. This * function verifies most of the criteria in 'c' itself, but the caller must * check 'c->cr' itself. * * Rules that have already been marked for removal are not collected. * * Increments '*n_readonly' if 'rule' wasn't added because it's read-only (and * 'c' only includes modifiable rules). */ static void collect_rule(struct rule *rule, const struct rule_criteria *c, struct rule_collection *rules, size_t *n_readonly) OVS_REQUIRES(ofproto_mutex) { if ((c->table_id == rule->table_id || c->table_id == 0xff) && ofproto_rule_has_out_port(rule, c->out_port) && ofproto_rule_has_out_group(rule, c->out_group) && !((rule->flow_cookie ^ c->cookie) & c->cookie_mask) && (!rule_is_hidden(rule) || c->include_hidden) && cls_rule_visible_in_version(&rule->cr, c->version)) { /* Rule matches all the criteria... */ if (!rule_is_readonly(rule) || c->include_readonly) { /* ...add it. */ rule_collection_add(rules, rule); } else { /* ...except it's read-only. */ ++*n_readonly; } } } /* Searches 'ofproto' for rules that match the criteria in 'criteria'. Matches * on classifiers rules are done in the "loose" way required for OpenFlow * OFPFC_MODIFY and OFPFC_DELETE requests. Puts the selected rules on list * 'rules'. * * Returns 0 on success, otherwise an OpenFlow error code. */ static enum ofperr collect_rules_loose(struct ofproto *ofproto, const struct rule_criteria *criteria, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { struct oftable *table; enum ofperr error = 0; size_t n_readonly = 0; rule_collection_init(rules); if (!check_table_id(ofproto, criteria->table_id)) { error = OFPERR_OFPBRC_BAD_TABLE_ID; goto exit; } if (criteria->cookie_mask == OVS_BE64_MAX) { struct rule *rule; HINDEX_FOR_EACH_WITH_HASH (rule, cookie_node, hash_cookie(criteria->cookie), &ofproto->cookies) { if (cls_rule_is_loose_match(&rule->cr, &criteria->cr.match)) { collect_rule(rule, criteria, rules, &n_readonly); } } } else { FOR_EACH_MATCHING_TABLE (table, criteria->table_id, ofproto) { struct rule *rule; CLS_FOR_EACH_TARGET (rule, cr, &table->cls, &criteria->cr, criteria->version) { collect_rule(rule, criteria, rules, &n_readonly); } } } exit: if (!error && !rule_collection_n(rules) && n_readonly) { /* We didn't find any rules to modify. We did find some read-only * rules that we're not allowed to modify, so report that. */ error = OFPERR_OFPBRC_EPERM; } if (error) { rule_collection_destroy(rules); } return error; } /* Searches 'ofproto' for rules that match the criteria in 'criteria'. Matches * on classifiers rules are done in the "strict" way required for OpenFlow * OFPFC_MODIFY_STRICT and OFPFC_DELETE_STRICT requests. Puts the selected * rules on list 'rules'. * * Returns 0 on success, otherwise an OpenFlow error code. */ static enum ofperr collect_rules_strict(struct ofproto *ofproto, const struct rule_criteria *criteria, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { struct oftable *table; size_t n_readonly = 0; enum ofperr error = 0; rule_collection_init(rules); if (!check_table_id(ofproto, criteria->table_id)) { error = OFPERR_OFPBRC_BAD_TABLE_ID; goto exit; } if (criteria->cookie_mask == OVS_BE64_MAX) { struct rule *rule; HINDEX_FOR_EACH_WITH_HASH (rule, cookie_node, hash_cookie(criteria->cookie), &ofproto->cookies) { if (cls_rule_equal(&rule->cr, &criteria->cr)) { collect_rule(rule, criteria, rules, &n_readonly); } } } else { FOR_EACH_MATCHING_TABLE (table, criteria->table_id, ofproto) { struct rule *rule; rule = rule_from_cls_rule(classifier_find_rule_exactly( &table->cls, &criteria->cr, criteria->version)); if (rule) { collect_rule(rule, criteria, rules, &n_readonly); } } } exit: if (!error && !rule_collection_n(rules) && n_readonly) { /* We didn't find any rules to modify. We did find some read-only * rules that we're not allowed to modify, so report that. */ error = OFPERR_OFPBRC_EPERM; } if (error) { rule_collection_destroy(rules); } return error; } /* Returns 'age_ms' (a duration in milliseconds), converted to seconds and * forced into the range of a uint16_t. */ static int age_secs(long long int age_ms) { return (age_ms < 0 ? 0 : age_ms >= UINT16_MAX * 1000 ? UINT16_MAX : (unsigned int) age_ms / 1000); } static enum ofperr handle_flow_stats_request(struct ofconn *ofconn, const struct ofp_header *request) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_flow_stats_request fsr; struct rule_criteria criteria; struct rule_collection rules; struct ovs_list replies; enum ofperr error; error = ofputil_decode_flow_stats_request(&fsr, request, ofproto_get_tun_tab(ofproto), &ofproto->vl_mff_map); if (error) { return error; } struct minimatch match; minimatch_init(&match, &fsr.match); rule_criteria_init(&criteria, fsr.table_id, &match, 0, OVS_VERSION_MAX, fsr.cookie, fsr.cookie_mask, fsr.out_port, fsr.out_group); minimatch_destroy(&match); ovs_mutex_lock(&ofproto_mutex); error = collect_rules_loose(ofproto, &criteria, &rules); rule_criteria_destroy(&criteria); if (!error) { rule_collection_ref(&rules); } ovs_mutex_unlock(&ofproto_mutex); if (error) { return error; } ofpmp_init(&replies, request); struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, &rules) { long long int now = time_msec(); struct ofputil_flow_stats fs; struct pkt_stats stats; long long int created, used, modified; const struct rule_actions *actions; enum ofputil_flow_mod_flags flags; ovs_mutex_lock(&rule->mutex); fs.cookie = rule->flow_cookie; fs.idle_timeout = rule->idle_timeout; fs.hard_timeout = rule->hard_timeout; fs.importance = rule->importance; created = rule->created; modified = rule->modified; actions = rule_get_actions(rule); flags = rule->flags; ovs_mutex_unlock(&rule->mutex); ofproto->ofproto_class->rule_get_stats(rule, &stats, &used); fs.packet_count = stats.n_packets; fs.byte_count = stats.n_bytes; minimatch_expand(&rule->cr.match, &fs.match); fs.table_id = rule->table_id; calc_duration(created, now, &fs.duration_sec, &fs.duration_nsec); fs.priority = rule->cr.priority; fs.idle_age = age_secs(now - used); fs.hard_age = age_secs(now - modified); fs.ofpacts = actions->ofpacts; fs.ofpacts_len = actions->ofpacts_len; fs.flags = flags; ofputil_append_flow_stats_reply(&fs, &replies, ofproto_get_tun_tab(ofproto)); } rule_collection_unref(&rules); rule_collection_destroy(&rules); ofconn_send_replies(ofconn, &replies); return 0; } static void flow_stats_ds(struct ofproto *ofproto, struct rule *rule, struct ds *results, bool offload_stats) { struct pkt_stats stats; const struct rule_actions *actions; long long int created, used; rule->ofproto->ofproto_class->rule_get_stats(rule, &stats, &used); ovs_mutex_lock(&rule->mutex); actions = rule_get_actions(rule); created = rule->created; ovs_mutex_unlock(&rule->mutex); if (rule->flow_cookie != 0) { ds_put_format(results, "cookie=0x%"PRIx64", ", ntohll(rule->flow_cookie)); } if (rule->table_id != 0) { ds_put_format(results, "table_id=%"PRIu8", ", rule->table_id); } ds_put_format(results, "duration=%llds, ", (time_msec() - created) / 1000); ds_put_format(results, "n_packets=%"PRIu64", ", stats.n_packets); ds_put_format(results, "n_bytes=%"PRIu64", ", stats.n_bytes); if (offload_stats) { ds_put_format(results, "n_offload_packets=%"PRIu64", ", stats.n_offload_packets); ds_put_format(results, "n_offload_bytes=%"PRIu64", ", stats.n_offload_bytes); } cls_rule_format(&rule->cr, ofproto_get_tun_tab(ofproto), NULL, results); ds_put_char(results, ','); ds_put_cstr(results, "actions="); struct ofpact_format_params fp = { .s = results }; ofpacts_format(actions->ofpacts, actions->ofpacts_len, &fp); ds_put_cstr(results, "\n"); } /* Adds a pretty-printed description of all flows to 'results', including * hidden flows (e.g., set up by in-band control). */ void ofproto_get_all_flows(struct ofproto *p, struct ds *results, bool offload_stats) { struct oftable *table; OFPROTO_FOR_EACH_TABLE (table, p) { struct rule *rule; CLS_FOR_EACH (rule, cr, &table->cls) { flow_stats_ds(p, rule, results, offload_stats); } } } /* Obtains the NetFlow engine type and engine ID for 'ofproto' into * '*engine_type' and '*engine_id', respectively. */ void ofproto_get_netflow_ids(const struct ofproto *ofproto, uint8_t *engine_type, uint8_t *engine_id) { ofproto->ofproto_class->get_netflow_ids(ofproto, engine_type, engine_id); } /* Checks the status change of CFM on 'ofport'. * * Returns true if 'ofproto_class' does not support 'cfm_status_changed'. */ bool ofproto_port_cfm_status_changed(struct ofproto *ofproto, ofp_port_t ofp_port) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); return (ofport && ofproto->ofproto_class->cfm_status_changed ? ofproto->ofproto_class->cfm_status_changed(ofport) : true); } /* Checks the status of CFM configured on 'ofp_port' within 'ofproto'. * Returns 0 if the port's CFM status was successfully stored into * '*status'. Returns positive errno if the port did not have CFM * configured. * * The caller must provide and own '*status', and must free 'status->rmps'. * '*status' is indeterminate if the return value is non-zero. */ int ofproto_port_get_cfm_status(const struct ofproto *ofproto, ofp_port_t ofp_port, struct cfm_status *status) { struct ofport *ofport = ofproto_get_port(ofproto, ofp_port); return (ofport && ofproto->ofproto_class->get_cfm_status ? ofproto->ofproto_class->get_cfm_status(ofport, status) : EOPNOTSUPP); } static enum ofperr handle_aggregate_stats_request(struct ofconn *ofconn, const struct ofp_header *oh) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_flow_stats_request request; struct ofputil_aggregate_stats stats; bool unknown_packets, unknown_bytes; struct rule_criteria criteria; struct rule_collection rules; struct ofpbuf *reply; enum ofperr error; error = ofputil_decode_flow_stats_request(&request, oh, ofproto_get_tun_tab(ofproto), &ofproto->vl_mff_map); if (error) { return error; } struct minimatch match; minimatch_init(&match, &request.match); rule_criteria_init(&criteria, request.table_id, &match, 0, OVS_VERSION_MAX, request.cookie, request.cookie_mask, request.out_port, request.out_group); minimatch_destroy(&match); ovs_mutex_lock(&ofproto_mutex); error = collect_rules_loose(ofproto, &criteria, &rules); rule_criteria_destroy(&criteria); if (!error) { rule_collection_ref(&rules); } ovs_mutex_unlock(&ofproto_mutex); if (error) { return error; } memset(&stats, 0, sizeof stats); unknown_packets = unknown_bytes = false; struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, &rules) { struct pkt_stats pkt_stats; long long int used; ofproto->ofproto_class->rule_get_stats(rule, &pkt_stats, &used); if (pkt_stats.n_packets == UINT64_MAX) { unknown_packets = true; } else { stats.packet_count += pkt_stats.n_packets; } if (pkt_stats.n_bytes == UINT64_MAX) { unknown_bytes = true; } else { stats.byte_count += pkt_stats.n_bytes; } stats.flow_count++; } if (unknown_packets) { stats.packet_count = UINT64_MAX; } if (unknown_bytes) { stats.byte_count = UINT64_MAX; } rule_collection_unref(&rules); rule_collection_destroy(&rules); reply = ofputil_encode_aggregate_stats_reply(&stats, oh); ofconn_send_reply(ofconn, reply); return 0; } struct queue_stats_cbdata { struct ofport *ofport; struct ovs_list replies; long long int now; }; static void put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id, const struct netdev_queue_stats *stats) { struct ofputil_queue_stats oqs; oqs.port_no = cbdata->ofport->pp.port_no; oqs.queue_id = queue_id; oqs.tx_bytes = stats->tx_bytes; oqs.tx_packets = stats->tx_packets; oqs.tx_errors = stats->tx_errors; if (stats->created != LLONG_MIN) { calc_duration(stats->created, cbdata->now, &oqs.duration_sec, &oqs.duration_nsec); } else { oqs.duration_sec = oqs.duration_nsec = UINT32_MAX; } ofputil_append_queue_stat(&cbdata->replies, &oqs); } static void handle_queue_stats_dump_cb(uint32_t queue_id, struct netdev_queue_stats *stats, void *cbdata_) { struct queue_stats_cbdata *cbdata = cbdata_; put_queue_stats(cbdata, queue_id, stats); } static enum ofperr handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id, struct queue_stats_cbdata *cbdata) { cbdata->ofport = port; if (queue_id == OFPQ_ALL) { netdev_dump_queue_stats(port->netdev, handle_queue_stats_dump_cb, cbdata); } else { struct netdev_queue_stats stats; if (!netdev_get_queue_stats(port->netdev, queue_id, &stats)) { put_queue_stats(cbdata, queue_id, &stats); } else { return OFPERR_OFPQOFC_BAD_QUEUE; } } return 0; } static enum ofperr handle_queue_stats_request(struct ofconn *ofconn, const struct ofp_header *rq) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct queue_stats_cbdata cbdata; struct ofport *port; enum ofperr error; struct ofputil_queue_stats_request oqsr; COVERAGE_INC(ofproto_queue_req); ofpmp_init(&cbdata.replies, rq); cbdata.now = time_msec(); error = ofputil_decode_queue_stats_request(rq, &oqsr); if (error) { return error; } if (oqsr.port_no == OFPP_ANY) { error = OFPERR_OFPQOFC_BAD_QUEUE; HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) { if (!handle_queue_stats_for_port(port, oqsr.queue_id, &cbdata)) { error = 0; } } } else { port = ofproto_get_port(ofproto, oqsr.port_no); error = (port ? handle_queue_stats_for_port(port, oqsr.queue_id, &cbdata) : OFPERR_OFPQOFC_BAD_PORT); } if (!error) { ofconn_send_replies(ofconn, &cbdata.replies); } else { ofpbuf_list_delete(&cbdata.replies); } return error; } static enum ofperr evict_rules_from_table(struct oftable *table) OVS_REQUIRES(ofproto_mutex) { enum ofperr error = 0; struct rule_collection rules; unsigned int count = table->n_flows; unsigned int max_flows = table->max_flows; rule_collection_init(&rules); while (count-- > max_flows) { struct rule *rule; if (!choose_rule_to_evict(table, &rule)) { error = OFPERR_OFPFMFC_TABLE_FULL; break; } else { eviction_group_remove_rule(rule); rule_collection_add(&rules, rule); } } delete_flows__(&rules, OFPRR_EVICTION, NULL); return error; } static void get_conjunctions(const struct ofputil_flow_mod *fm, struct cls_conjunction **conjsp, size_t *n_conjsp) { struct cls_conjunction *conjs = NULL; int n_conjs = 0; const struct ofpact *ofpact; OFPACT_FOR_EACH (ofpact, fm->ofpacts, fm->ofpacts_len) { if (ofpact->type == OFPACT_CONJUNCTION) { n_conjs++; } else if (ofpact->type != OFPACT_NOTE) { /* "conjunction" may appear with "note" actions but not with any * other type of actions. */ ovs_assert(!n_conjs); break; } } if (n_conjs) { int i = 0; conjs = xzalloc(n_conjs * sizeof *conjs); OFPACT_FOR_EACH (ofpact, fm->ofpacts, fm->ofpacts_len) { if (ofpact->type == OFPACT_CONJUNCTION) { struct ofpact_conjunction *oc = ofpact_get_CONJUNCTION(ofpact); conjs[i].clause = oc->clause; conjs[i].n_clauses = oc->n_clauses; conjs[i].id = oc->id; i++; } } } *conjsp = conjs; *n_conjsp = n_conjs; } /* add_flow_init(), add_flow_start(), add_flow_revert(), and add_flow_finish() * implement OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT * in which no matching flow already exists in the flow table. * * add_flow_init() creates a new flow according to 'fm' and stores it to 'ofm' * for later reference. If the flow replaces other flow, it will be updated to * match modify semantics later by add_flow_start() (by calling * replace_rule_start()). * * Returns 0 on success, or an OpenFlow error code on failure. * * On successful return the caller must complete the operation by calling * add_flow_start(), and if that succeeds, then either add_flow_finish(), or * add_flow_revert() if the operation needs to be reverted due to a later * failure. */ static enum ofperr add_flow_init(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct ofputil_flow_mod *fm) OVS_EXCLUDED(ofproto_mutex) { struct oftable *table; struct cls_rule cr; uint8_t table_id; enum ofperr error; if (!check_table_id(ofproto, fm->table_id)) { return OFPERR_OFPBRC_BAD_TABLE_ID; } /* Pick table. */ if (fm->table_id == 0xff) { if (ofproto->ofproto_class->rule_choose_table) { error = ofproto->ofproto_class->rule_choose_table(ofproto, &fm->match, &table_id); if (error) { return error; } ovs_assert(table_id < ofproto->n_tables); } else { table_id = 0; } } else if (fm->table_id < ofproto->n_tables) { table_id = fm->table_id; } else { return OFPERR_OFPBRC_BAD_TABLE_ID; } table = &ofproto->tables[table_id]; if (table->flags & OFTABLE_READONLY && !(fm->flags & OFPUTIL_FF_NO_READONLY)) { return OFPERR_OFPBRC_EPERM; } if (!(fm->flags & OFPUTIL_FF_HIDDEN_FIELDS) && !minimatch_has_default_hidden_fields(&fm->match)) { VLOG_WARN_RL(&rl, "%s: (add_flow) only internal flows can set " "non-default values to hidden fields", ofproto->name); return OFPERR_OFPBRC_EPERM; } if (!ofm->temp_rule) { cls_rule_init_from_minimatch(&cr, &fm->match, fm->priority); /* Allocate new rule. Destroys 'cr'. */ uint64_t map = miniflow_get_tun_metadata_present_map(fm->match.flow); error = ofproto_rule_create(ofproto, &cr, table - ofproto->tables, fm->new_cookie, fm->idle_timeout, fm->hard_timeout, fm->flags, fm->importance, fm->ofpacts, fm->ofpacts_len, map, fm->ofpacts_tlv_bitmap, &ofm->temp_rule); if (error) { return error; } get_conjunctions(fm, &ofm->conjs, &ofm->n_conjs); } return 0; } /* ofm->temp_rule is consumed only in the successful case. */ static enum ofperr add_flow_start(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule *old_rule = NULL; struct rule *new_rule = ofm->temp_rule; const struct rule_actions *actions = rule_get_actions(new_rule); struct oftable *table = &ofproto->tables[new_rule->table_id]; enum ofperr error; /* Must check actions while holding ofproto_mutex to avoid a race. */ error = ofproto_check_ofpacts(ofproto, actions->ofpacts, actions->ofpacts_len); if (error) { return error; } /* Check for the existence of an identical rule. * This will not return rules earlier marked for removal. */ old_rule = rule_from_cls_rule(classifier_find_rule_exactly(&table->cls, &new_rule->cr, ofm->version)); if (!old_rule) { /* Check for overlap, if requested. */ if (new_rule->flags & OFPUTIL_FF_CHECK_OVERLAP && classifier_rule_overlaps(&table->cls, &new_rule->cr, ofm->version)) { return OFPERR_OFPFMFC_OVERLAP; } /* If necessary, evict an existing rule to clear out space. */ if (table->n_flows >= table->max_flows) { if (!choose_rule_to_evict(table, &old_rule)) { return OFPERR_OFPFMFC_TABLE_FULL; } eviction_group_remove_rule(old_rule); /* Marks 'old_rule' as an evicted rule rather than replaced rule. */ old_rule->removed_reason = OFPRR_EVICTION; } } else { ofm->modify_cookie = true; } if (old_rule) { rule_collection_add(&ofm->old_rules, old_rule); } /* Take ownership of the temp_rule. */ rule_collection_add(&ofm->new_rules, new_rule); ofm->temp_rule = NULL; replace_rule_start(ofproto, ofm, old_rule, new_rule); return 0; } /* Revert the effects of add_flow_start(). */ static void add_flow_revert(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule *old_rule = rule_collection_n(&ofm->old_rules) ? rule_collection_rules(&ofm->old_rules)[0] : NULL; struct rule *new_rule = rule_collection_rules(&ofm->new_rules)[0]; replace_rule_revert(ofproto, old_rule, new_rule); } /* To be called after version bump. */ static enum ofperr add_flow_finish(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { struct rule *old_rule = rule_collection_n(&ofm->old_rules) ? rule_collection_rules(&ofm->old_rules)[0] : NULL; struct rule *new_rule = rule_collection_rules(&ofm->new_rules)[0]; struct ovs_list dead_cookies = OVS_LIST_INITIALIZER(&dead_cookies); enum ofperr error = 0; error = replace_rule_finish(ofproto, ofm, req, old_rule, new_rule, &dead_cookies); if (error) { return error; } learned_cookies_flush(ofproto, &dead_cookies); if (old_rule) { ovsrcu_postpone(remove_rule_rcu, old_rule); } else { ofmonitor_report(ofproto->connmgr, new_rule, OFPFME_ADDED, 0, req ? req->ofconn : NULL, req ? req->request->xid : 0, NULL); /* Send Vacancy Events for OF1.4+. */ send_table_status(ofproto, new_rule->table_id); } return error; } /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */ /* Create a new rule. Note that the rule is NOT inserted into a any data * structures yet. Takes ownership of 'cr'. Only assigns '*new_rule' if * successful. */ static enum ofperr ofproto_rule_create(struct ofproto *ofproto, struct cls_rule *cr, uint8_t table_id, ovs_be64 new_cookie, uint16_t idle_timeout, uint16_t hard_timeout, enum ofputil_flow_mod_flags flags, uint16_t importance, const struct ofpact *ofpacts, size_t ofpacts_len, uint64_t match_tlv_bitmap, uint64_t ofpacts_tlv_bitmap, struct rule **new_rule) OVS_NO_THREAD_SAFETY_ANALYSIS { struct rule *rule; enum ofperr error; if (!ofproto_try_ref(ofproto)) { return OFPERR_OFPFMFC_UNKNOWN; } /* Allocate new rule. */ rule = ofproto->ofproto_class->rule_alloc(); if (!rule) { cls_rule_destroy(cr); ofproto_unref(ofproto); VLOG_WARN_RL(&rl, "%s: failed to allocate a rule.", ofproto->name); return OFPERR_OFPFMFC_UNKNOWN; } /* Initialize base state. */ *CONST_CAST(struct ofproto **, &rule->ofproto) = ofproto; cls_rule_move(CONST_CAST(struct cls_rule *, &rule->cr), cr); ovs_refcount_init(&rule->ref_count); ovs_mutex_init(&rule->mutex); ovs_mutex_lock(&rule->mutex); *CONST_CAST(ovs_be64 *, &rule->flow_cookie) = new_cookie; rule->created = rule->modified = time_msec(); rule->idle_timeout = idle_timeout; rule->hard_timeout = hard_timeout; *CONST_CAST(uint16_t *, &rule->importance) = importance; rule->removed_reason = OVS_OFPRR_NONE; *CONST_CAST(uint8_t *, &rule->table_id) = table_id; rule->flags = flags & OFPUTIL_FF_STATE; *CONST_CAST(const struct rule_actions **, &rule->actions) = rule_actions_create(ofpacts, ofpacts_len); ovs_list_init(&rule->meter_list_node); rule->eviction_group = NULL; rule->monitor_flags = 0; rule->add_seqno = 0; rule->modify_seqno = 0; ovs_list_init(&rule->expirable); ovs_mutex_unlock(&rule->mutex); /* Construct rule, initializing derived state. */ error = ofproto->ofproto_class->rule_construct(rule); if (error) { ofproto_rule_destroy__(rule); return error; } rule->state = RULE_INITIALIZED; rule->match_tlv_bitmap = match_tlv_bitmap; rule->ofpacts_tlv_bitmap = ofpacts_tlv_bitmap; mf_vl_mff_ref(&rule->ofproto->vl_mff_map, match_tlv_bitmap); mf_vl_mff_ref(&rule->ofproto->vl_mff_map, ofpacts_tlv_bitmap); *new_rule = rule; return 0; } /* Initialize 'ofm' for a learn action. If the rule already existed, reference * to that rule is taken, otherwise a new rule is created. 'ofm' keeps the * rule reference in both. This does not take the global 'ofproto_mutex'. */ enum ofperr ofproto_flow_mod_init_for_learn(struct ofproto *ofproto, const struct ofputil_flow_mod *fm, struct ofproto_flow_mod *ofm) OVS_EXCLUDED(ofproto_mutex) { /* Reject flow mods that do not look like they were generated by a learn * action. */ if (fm->command != OFPFC_MODIFY_STRICT || fm->table_id == OFPTT_ALL || fm->flags & OFPUTIL_FF_RESET_COUNTS || fm->buffer_id != UINT32_MAX) { return OFPERR_OFPFMFC_UNKNOWN; } /* Check if the rule already exists, and we can get a reference to it. */ struct oftable *table = &ofproto->tables[fm->table_id]; struct rule *rule; rule = rule_from_cls_rule(classifier_find_minimatch_exactly( &table->cls, &fm->match, fm->priority, OVS_VERSION_MAX)); if (rule) { /* Check if the rule's attributes match as well. */ const struct rule_actions *actions; ovs_mutex_lock(&rule->mutex); actions = rule_get_actions(rule); if (rule->idle_timeout == fm->idle_timeout && rule->hard_timeout == fm->hard_timeout && rule->importance == fm->importance && rule->flags == (fm->flags & OFPUTIL_FF_STATE) && (!fm->modify_cookie || (fm->new_cookie == rule->flow_cookie)) && ofpacts_equal(fm->ofpacts, fm->ofpacts_len, actions->ofpacts, actions->ofpacts_len)) { /* Rule already exists and need not change, except for the modified * timestamp. Get a reference to the existing rule. */ ovs_mutex_unlock(&rule->mutex); if (!ofproto_rule_try_ref(rule)) { rule = NULL; /* Pretend it did not exist. */ } } else { ovs_mutex_unlock(&rule->mutex); rule = NULL; } } return ofproto_flow_mod_init(ofproto, ofm, fm, rule); } enum ofperr ofproto_flow_mod_learn_refresh(struct ofproto_flow_mod *ofm) { enum ofperr error = 0; /* ofm->temp_rule is our reference to the learned rule. We have a * reference to an existing rule, if it already was in the classifier, * otherwise we may have a fresh rule that we need to insert. */ struct rule *rule = ofm->temp_rule; if (!rule) { return OFPERR_OFPFMFC_UNKNOWN; } /* Create a new rule if the current one has been removed from the * classifier. We need to do this since RCU does not allow a current rule * to be reinserted before all threads have quiesced. * * It is possible that the rule is removed asynchronously, e.g., right * after we have read the 'rule->state' below. In this case the next time * this function is executed the rule will be reinstated. */ if (rule->state == RULE_REMOVED) { struct cls_rule cr; cls_rule_clone(&cr, &rule->cr); ovs_mutex_lock(&rule->mutex); error = ofproto_rule_create(rule->ofproto, &cr, rule->table_id, rule->flow_cookie, rule->idle_timeout, rule->hard_timeout, rule->flags, rule->importance, rule->actions->ofpacts, rule->actions->ofpacts_len, rule->match_tlv_bitmap, rule->ofpacts_tlv_bitmap, &ofm->temp_rule); ovs_mutex_unlock(&rule->mutex); if (!error) { ofproto_rule_unref(rule); /* Release old reference. */ } } else { /* Refresh the existing rule. */ ovs_mutex_lock(&rule->mutex); rule->modified = time_msec(); ovs_mutex_unlock(&rule->mutex); } return error; } enum ofperr ofproto_flow_mod_learn_start(struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule *rule = ofm->temp_rule; /* ofproto_flow_mod_start() consumes the reference, so we * take a new one. */ ofproto_rule_ref(rule); enum ofperr error = ofproto_flow_mod_start(rule->ofproto, ofm); ofm->temp_rule = rule; return error; } void ofproto_flow_mod_learn_revert(struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule *rule = rule_collection_rules(&ofm->new_rules)[0]; ofproto_flow_mod_revert(rule->ofproto, ofm); } enum ofperr ofproto_flow_mod_learn_finish(struct ofproto_flow_mod *ofm, struct ofproto *orig_ofproto) OVS_REQUIRES(ofproto_mutex) { struct rule *rule = rule_collection_rules(&ofm->new_rules)[0]; enum ofperr error = 0; /* If learning on a different bridge, must bump its version * number and flush connmgr afterwards. */ if (rule->ofproto != orig_ofproto) { ofproto_bump_tables_version(rule->ofproto); } error = ofproto_flow_mod_finish(rule->ofproto, ofm, NULL); if (rule->ofproto != orig_ofproto) { ofmonitor_flush(rule->ofproto->connmgr); } return error; } /* Refresh 'ofm->temp_rule', for which the caller holds a reference, if already * in the classifier, insert it otherwise. If the rule has already been * removed from the classifier, a new rule is created using 'ofm->temp_rule' as * a template and the reference to the old 'ofm->temp_rule' is freed. If * 'keep_ref' is true, then a reference to the current rule is held, otherwise * it is released and 'ofm->temp_rule' is set to NULL. * * If 'limit' != 0, insertion will fail if there are more than 'limit' rules * in the same table with the same cookie. If insertion succeeds, * '*below_limitp' will be set to true. If insertion fails '*below_limitp' * will be set to false. * * Caller needs to be the exclusive owner of 'ofm' as it is being manipulated * during the call. */ enum ofperr ofproto_flow_mod_learn(struct ofproto_flow_mod *ofm, bool keep_ref, unsigned limit, bool *below_limitp) OVS_EXCLUDED(ofproto_mutex) { enum ofperr error = ofproto_flow_mod_learn_refresh(ofm); struct rule *rule = ofm->temp_rule; bool below_limit = true; /* Do we need to insert the rule? */ if (!error && rule->state == RULE_INITIALIZED) { ovs_mutex_lock(&ofproto_mutex); if (limit) { struct rule_criteria criteria; struct rule_collection rules; struct minimatch match; minimatch_init_catchall(&match); rule_criteria_init(&criteria, rule->table_id, &match, 0, OVS_VERSION_MAX, rule->flow_cookie, OVS_BE64_MAX, OFPP_ANY, OFPG_ANY); minimatch_destroy(&match); rule_criteria_require_rw(&criteria, false); collect_rules_loose(rule->ofproto, &criteria, &rules); if (rule_collection_n(&rules) >= limit) { below_limit = false; } rule_collection_destroy(&rules); rule_criteria_destroy(&criteria); } if (below_limit) { ofm->version = rule->ofproto->tables_version + 1; error = ofproto_flow_mod_learn_start(ofm); if (!error) { error = ofproto_flow_mod_learn_finish(ofm, NULL); } } else { static struct vlog_rate_limit rll = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_INFO_RL(&rll, "Learn limit for flow %"PRIu64" reached.", rule->flow_cookie); ofproto_flow_mod_uninit(ofm); } ovs_mutex_unlock(&ofproto_mutex); } if (!keep_ref && below_limit) { ofproto_rule_unref(rule); ofm->temp_rule = NULL; } if (below_limitp) { *below_limitp = below_limit; } return error; } static void replace_rule_start(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, struct rule *old_rule, struct rule *new_rule) { struct oftable *table = &ofproto->tables[new_rule->table_id]; /* 'old_rule' may be either an evicted rule or replaced rule. */ if (old_rule) { /* Copy values from old rule for modify semantics. */ if (old_rule->removed_reason != OFPRR_EVICTION) { bool change_cookie = (ofm->modify_cookie && new_rule->flow_cookie != OVS_BE64_MAX && new_rule->flow_cookie != old_rule->flow_cookie); ovs_mutex_lock(&new_rule->mutex); ovs_mutex_lock(&old_rule->mutex); if (ofm->command != OFPFC_ADD) { new_rule->idle_timeout = old_rule->idle_timeout; new_rule->hard_timeout = old_rule->hard_timeout; *CONST_CAST(uint16_t *, &new_rule->importance) = old_rule->importance; new_rule->flags = old_rule->flags; new_rule->created = old_rule->created; } if (!change_cookie) { *CONST_CAST(ovs_be64 *, &new_rule->flow_cookie) = old_rule->flow_cookie; } ovs_mutex_unlock(&old_rule->mutex); ovs_mutex_unlock(&new_rule->mutex); } /* Mark the old rule for removal in the next version. */ cls_rule_make_invisible_in_version(&old_rule->cr, ofm->version); /* Remove the old rule from data structures. */ ofproto_rule_remove__(ofproto, old_rule); } else { table->n_flows++; } /* Insert flow to ofproto data structures, so that later flow_mods may * relate to it. This is reversible, in case later errors require this to * be reverted. */ ofproto_rule_insert__(ofproto, new_rule); /* Make the new rule visible for classifier lookups only from the next * version. */ classifier_insert(&table->cls, &new_rule->cr, ofm->version, ofm->conjs, ofm->n_conjs); } static void replace_rule_revert(struct ofproto *ofproto, struct rule *old_rule, struct rule *new_rule) { struct oftable *table = &ofproto->tables[new_rule->table_id]; if (old_rule) { if (old_rule->removed_reason == OFPRR_EVICTION) { /* Revert the eviction. */ eviction_group_add_rule(old_rule); } /* Restore the old rule to data structures. */ ofproto_rule_insert__(ofproto, old_rule); /* Restore the original visibility of the old rule. */ cls_rule_restore_visibility(&old_rule->cr); } else { /* Restore table's rule count. */ table->n_flows--; } /* Remove the new rule immediately. It was never visible to lookups. */ classifier_remove_assert(&table->cls, &new_rule->cr); ofproto_rule_remove__(ofproto, new_rule); ofproto_rule_unref(new_rule); } /* Adds the 'new_rule', replacing the 'old_rule'. */ static enum ofperr replace_rule_finish(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct openflow_mod_requester *req, struct rule *old_rule, struct rule *new_rule, struct ovs_list *dead_cookies) OVS_REQUIRES(ofproto_mutex) { struct rule *replaced_rule; enum ofperr error = 0; struct oftable *table = &ofproto->tables[new_rule->table_id]; replaced_rule = (old_rule && old_rule->removed_reason != OFPRR_EVICTION) ? old_rule : NULL; /* Insert the new flow to the ofproto provider. A non-NULL 'replaced_rule' * is a duplicate rule the 'new_rule' is replacing. The provider should * link the packet and byte counts from the old rule to the new one if * 'modify_keep_counts' is 'true'. The 'replaced_rule' will be deleted * right after this call. */ error = ofproto->ofproto_class->rule_insert(new_rule, replaced_rule, ofm->modify_keep_counts); if (error) { if (classifier_remove(&table->cls, &new_rule->cr)) { ofproto_rule_destroy__(new_rule); } return error; } learned_cookies_inc(ofproto, rule_get_actions(new_rule)); if (old_rule) { const struct rule_actions *old_actions = rule_get_actions(old_rule); const struct rule_actions *new_actions = rule_get_actions(new_rule); learned_cookies_dec(ofproto, old_actions, dead_cookies); if (replaced_rule) { enum ofp_flow_update_event event = ofm->command == OFPFC_ADD ? OFPFME_ADDED : OFPFME_MODIFIED; bool changed_cookie = (new_rule->flow_cookie != old_rule->flow_cookie); bool changed_actions = !ofpacts_equal(new_actions->ofpacts, new_actions->ofpacts_len, old_actions->ofpacts, old_actions->ofpacts_len); if (event != OFPFME_MODIFIED || changed_actions || changed_cookie) { ofmonitor_report(ofproto->connmgr, new_rule, event, 0, req ? req->ofconn : NULL, req ? req->request->xid : 0, changed_actions ? old_actions : NULL); } } else { /* XXX: This is slight duplication with delete_flows_finish__() */ ofmonitor_report(ofproto->connmgr, old_rule, OFPFME_REMOVED, OFPRR_EVICTION, req ? req->ofconn : NULL, req ? req->request->xid : 0, NULL); } } return error; } /* ofm->temp_rule is consumed only in the successful case. */ static enum ofperr modify_flows_start__(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *old_rules = &ofm->old_rules; struct rule_collection *new_rules = &ofm->new_rules; enum ofperr error; if (rule_collection_n(old_rules) > 0) { /* Create a new 'modified' rule for each old rule. */ struct rule *old_rule, *new_rule; const struct rule_actions *actions = rule_get_actions(ofm->temp_rule); /* Must check actions while holding ofproto_mutex to avoid a race. */ error = ofproto_check_ofpacts(ofproto, actions->ofpacts, actions->ofpacts_len); if (error) { return error; } /* Use the temp rule as the first new rule, and as the template for * the rest. */ struct rule *temp = ofm->temp_rule; ofm->temp_rule = NULL; /* We consume the template. */ bool first = true; RULE_COLLECTION_FOR_EACH (old_rule, old_rules) { if (first) { /* The template rule's match is possibly a loose one, so it * must be replaced with the old rule's match so that the new * rule actually replaces the old one. */ cls_rule_destroy(CONST_CAST(struct cls_rule *, &temp->cr)); cls_rule_clone(CONST_CAST(struct cls_rule *, &temp->cr), &old_rule->cr); if (temp->match_tlv_bitmap != old_rule->match_tlv_bitmap) { mf_vl_mff_unref(&temp->ofproto->vl_mff_map, temp->match_tlv_bitmap); temp->match_tlv_bitmap = old_rule->match_tlv_bitmap; mf_vl_mff_ref(&temp->ofproto->vl_mff_map, temp->match_tlv_bitmap); } *CONST_CAST(uint8_t *, &temp->table_id) = old_rule->table_id; rule_collection_add(new_rules, temp); first = false; } else { struct cls_rule cr; cls_rule_clone(&cr, &old_rule->cr); error = ofproto_rule_create(ofproto, &cr, old_rule->table_id, temp->flow_cookie, temp->idle_timeout, temp->hard_timeout, temp->flags, temp->importance, temp->actions->ofpacts, temp->actions->ofpacts_len, old_rule->match_tlv_bitmap, temp->ofpacts_tlv_bitmap, &new_rule); if (!error) { rule_collection_add(new_rules, new_rule); } else { /* Return the template rule in place in the error case. */ ofm->temp_rule = temp; rule_collection_rules(new_rules)[0] = NULL; rule_collection_unref(new_rules); rule_collection_destroy(new_rules); return error; } } } ovs_assert(rule_collection_n(new_rules) == rule_collection_n(old_rules)); RULE_COLLECTIONS_FOR_EACH (old_rule, new_rule, old_rules, new_rules) { replace_rule_start(ofproto, ofm, old_rule, new_rule); } } else if (ofm->modify_may_add_flow) { /* No match, add a new flow, consumes 'temp'. */ error = add_flow_start(ofproto, ofm); } else { /* No flow to modify and may not add a flow. */ ofproto_rule_unref(ofm->temp_rule); ofm->temp_rule = NULL; /* We consume the template. */ error = 0; } return error; } static enum ofperr modify_flows_init_loose(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct ofputil_flow_mod *fm) OVS_EXCLUDED(ofproto_mutex) { rule_criteria_init(&ofm->criteria, fm->table_id, &fm->match, 0, OVS_VERSION_MAX, fm->cookie, fm->cookie_mask, OFPP_ANY, OFPG_ANY); rule_criteria_require_rw(&ofm->criteria, (fm->flags & OFPUTIL_FF_NO_READONLY) != 0); /* Must create a new flow in advance for the case that no matches are * found. Also used for template for multiple modified flows. */ return add_flow_init(ofproto, ofm, fm); } /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code on * failure. */ static enum ofperr modify_flows_start_loose(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *old_rules = &ofm->old_rules; enum ofperr error; error = collect_rules_loose(ofproto, &ofm->criteria, old_rules); if (!error) { error = modify_flows_start__(ofproto, ofm); } if (error) { rule_collection_destroy(old_rules); } return error; } static void modify_flows_revert(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *old_rules = &ofm->old_rules; struct rule_collection *new_rules = &ofm->new_rules; /* Old rules were not changed yet, only need to revert new rules. */ if (rule_collection_n(old_rules) > 0) { struct rule *old_rule, *new_rule; RULE_COLLECTIONS_FOR_EACH (old_rule, new_rule, old_rules, new_rules) { replace_rule_revert(ofproto, old_rule, new_rule); } rule_collection_destroy(new_rules); rule_collection_destroy(old_rules); } } static enum ofperr modify_flows_finish(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *old_rules = &ofm->old_rules; struct rule_collection *new_rules = &ofm->new_rules; enum ofperr error = 0; if (rule_collection_n(old_rules) == 0 && rule_collection_n(new_rules) == 1) { error = add_flow_finish(ofproto, ofm, req); } else if (rule_collection_n(old_rules) > 0) { struct ovs_list dead_cookies = OVS_LIST_INITIALIZER(&dead_cookies); ovs_assert(rule_collection_n(new_rules) == rule_collection_n(old_rules)); struct rule *old_rule, *new_rule; RULE_COLLECTIONS_FOR_EACH (old_rule, new_rule, old_rules, new_rules) { error = replace_rule_finish(ofproto, ofm, req, old_rule, new_rule, &dead_cookies); if (error) { return error; } } learned_cookies_flush(ofproto, &dead_cookies); rules_mark_for_removal(ofproto, old_rules); } return error; } static enum ofperr modify_flow_init_strict(struct ofproto *ofproto OVS_UNUSED, struct ofproto_flow_mod *ofm, const struct ofputil_flow_mod *fm) OVS_EXCLUDED(ofproto_mutex) { rule_criteria_init(&ofm->criteria, fm->table_id, &fm->match, fm->priority, OVS_VERSION_MAX, fm->cookie, fm->cookie_mask, OFPP_ANY, OFPG_ANY); rule_criteria_require_rw(&ofm->criteria, (fm->flags & OFPUTIL_FF_NO_READONLY) != 0); /* Must create a new flow in advance for the case that no matches are * found. Also used for template for multiple modified flows. */ return add_flow_init(ofproto, ofm, fm); } /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error * code on failure. */ static enum ofperr modify_flow_start_strict(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *old_rules = &ofm->old_rules; enum ofperr error; error = collect_rules_strict(ofproto, &ofm->criteria, old_rules); if (!error) { /* collect_rules_strict() can return max 1 rule. */ error = modify_flows_start__(ofproto, ofm); } return error; } /* OFPFC_DELETE implementation. */ static void delete_flows_start__(struct ofproto *ofproto, ovs_version_t version, const struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, rules) { struct oftable *table = &ofproto->tables[rule->table_id]; table->n_flows--; cls_rule_make_invisible_in_version(&rule->cr, version); /* Remove rule from ofproto data structures. */ ofproto_rule_remove__(ofproto, rule); } } static void delete_flows_revert__(struct ofproto *ofproto, const struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, rules) { struct oftable *table = &ofproto->tables[rule->table_id]; /* Add rule back to ofproto data structures. */ ofproto_rule_insert__(ofproto, rule); /* Restore table's rule count. */ table->n_flows++; /* Restore the original visibility of the rule. */ cls_rule_restore_visibility(&rule->cr); } } static void delete_flows_finish__(struct ofproto *ofproto, struct rule_collection *rules, enum ofp_flow_removed_reason reason, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { if (rule_collection_n(rules)) { struct ovs_list dead_cookies = OVS_LIST_INITIALIZER(&dead_cookies); struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, rules) { /* This value will be used to send the flow removed message right * before the rule is actually destroyed. */ rule->removed_reason = reason; ofmonitor_report(ofproto->connmgr, rule, OFPFME_REMOVED, reason, req ? req->ofconn : NULL, req ? req->request->xid : 0, NULL); /* Send Vacancy Event for OF1.4+. */ send_table_status(ofproto, rule->table_id); learned_cookies_dec(ofproto, rule_get_actions(rule), &dead_cookies); } rules_mark_for_removal(ofproto, rules); learned_cookies_flush(ofproto, &dead_cookies); } } /* Deletes the rules listed in 'rules'. * The deleted rules will become invisible to the lookups in the next version. * Destroys 'rules'. */ static void delete_flows__(struct rule_collection *rules, enum ofp_flow_removed_reason reason, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { if (rule_collection_n(rules)) { struct ofproto *ofproto = rule_collection_rules(rules)[0]->ofproto; delete_flows_start__(ofproto, ofproto->tables_version + 1, rules); ofproto_bump_tables_version(ofproto); delete_flows_finish__(ofproto, rules, reason, req); ofmonitor_flush(ofproto->connmgr); } } static enum ofperr delete_flows_init_loose(struct ofproto *ofproto OVS_UNUSED, struct ofproto_flow_mod *ofm, const struct ofputil_flow_mod *fm) OVS_EXCLUDED(ofproto_mutex) { rule_criteria_init(&ofm->criteria, fm->table_id, &fm->match, 0, OVS_VERSION_MAX, fm->cookie, fm->cookie_mask, fm->out_port, fm->out_group); rule_criteria_require_rw(&ofm->criteria, (fm->flags & OFPUTIL_FF_NO_READONLY) != 0); return 0; } /* Implements OFPFC_DELETE. */ static enum ofperr delete_flows_start_loose(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *rules = &ofm->old_rules; enum ofperr error; error = collect_rules_loose(ofproto, &ofm->criteria, rules); if (!error) { delete_flows_start__(ofproto, ofm->version, rules); } return error; } static void delete_flows_revert(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { delete_flows_revert__(ofproto, &ofm->old_rules); } static void delete_flows_finish(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { delete_flows_finish__(ofproto, &ofm->old_rules, OFPRR_DELETE, req); } static enum ofperr delete_flows_init_strict(struct ofproto *ofproto OVS_UNUSED, struct ofproto_flow_mod *ofm, const struct ofputil_flow_mod *fm) OVS_EXCLUDED(ofproto_mutex) { rule_criteria_init(&ofm->criteria, fm->table_id, &fm->match, fm->priority, OVS_VERSION_MAX, fm->cookie, fm->cookie_mask, fm->out_port, fm->out_group); rule_criteria_require_rw(&ofm->criteria, (fm->flags & OFPUTIL_FF_NO_READONLY) != 0); return 0; } /* Implements OFPFC_DELETE_STRICT. */ static enum ofperr delete_flow_start_strict(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { struct rule_collection *rules = &ofm->old_rules; enum ofperr error; error = collect_rules_strict(ofproto, &ofm->criteria, rules); if (!error) { delete_flows_start__(ofproto, ofm->version, rules); } return error; } /* This may only be called by rule_destroy_cb()! */ static void ofproto_rule_send_removed(struct rule *rule) OVS_EXCLUDED(ofproto_mutex) { struct ofputil_flow_removed fr; long long int used; struct pkt_stats stats; minimatch_expand(&rule->cr.match, &fr.match); fr.priority = rule->cr.priority; /* Synchronize with connmgr_destroy() calls to prevent connmgr disappearing * while we use it. */ ovs_mutex_lock(&ofproto_mutex); struct connmgr *connmgr = rule->ofproto->connmgr; if (!connmgr) { ovs_mutex_unlock(&ofproto_mutex); return; } fr.cookie = rule->flow_cookie; fr.reason = rule->removed_reason; fr.table_id = rule->table_id; calc_duration(rule->created, time_msec(), &fr.duration_sec, &fr.duration_nsec); ovs_mutex_lock(&rule->mutex); fr.idle_timeout = rule->idle_timeout; fr.hard_timeout = rule->hard_timeout; ovs_mutex_unlock(&rule->mutex); rule->ofproto->ofproto_class->rule_get_stats(rule, &stats, &used); fr.packet_count = stats.n_packets; fr.byte_count = stats.n_bytes; connmgr_send_flow_removed(connmgr, &fr); ovs_mutex_unlock(&ofproto_mutex); } /* Sends an OpenFlow "flow removed" message with the given 'reason' (either * OFPRR_HARD_TIMEOUT or OFPRR_IDLE_TIMEOUT), and then removes 'rule' from its * ofproto. * * ofproto implementation ->run() functions should use this function to expire * OpenFlow flows. */ void ofproto_rule_expire(struct rule *rule, uint8_t reason) OVS_REQUIRES(ofproto_mutex) { struct rule_collection rules; rule_collection_init(&rules); rule_collection_add(&rules, rule); delete_flows__(&rules, reason, NULL); } /* Reduces '*timeout' to no more than 'max'. A value of zero in either case * means "infinite". */ static void reduce_timeout(uint16_t max, uint16_t *timeout) { if (max && (!*timeout || *timeout > max)) { *timeout = max; } } /* If 'idle_timeout' is nonzero, and 'rule' has no idle timeout or an idle * timeout greater than 'idle_timeout', lowers 'rule''s idle timeout to * 'idle_timeout' seconds. Similarly for 'hard_timeout'. * * Suitable for implementing OFPACT_FIN_TIMEOUT. */ void ofproto_rule_reduce_timeouts__(struct rule *rule, uint16_t idle_timeout, uint16_t hard_timeout) OVS_REQUIRES(ofproto_mutex) OVS_EXCLUDED(rule->mutex) { if (!idle_timeout && !hard_timeout) { return; } if (ovs_list_is_empty(&rule->expirable)) { ovs_list_insert(&rule->ofproto->expirable, &rule->expirable); } ovs_mutex_lock(&rule->mutex); reduce_timeout(idle_timeout, &rule->idle_timeout); reduce_timeout(hard_timeout, &rule->hard_timeout); ovs_mutex_unlock(&rule->mutex); } void ofproto_rule_reduce_timeouts(struct rule *rule, uint16_t idle_timeout, uint16_t hard_timeout) OVS_EXCLUDED(ofproto_mutex, rule->mutex) { if (!idle_timeout && !hard_timeout) { return; } ovs_mutex_lock(&ofproto_mutex); if (ovs_list_is_empty(&rule->expirable)) { ovs_list_insert(&rule->ofproto->expirable, &rule->expirable); } ovs_mutex_unlock(&ofproto_mutex); ovs_mutex_lock(&rule->mutex); reduce_timeout(idle_timeout, &rule->idle_timeout); reduce_timeout(hard_timeout, &rule->hard_timeout); ovs_mutex_unlock(&rule->mutex); } static enum ofperr handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_flow_mod fm; uint64_t ofpacts_stub[1024 / 8]; struct ofpbuf ofpacts; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub); error = ofputil_decode_flow_mod(&fm, oh, ofconn_get_protocol(ofconn), ofproto_get_tun_tab(ofproto), &ofproto->vl_mff_map, &ofpacts, u16_to_ofp(ofproto->max_ports), ofproto->n_tables); if (!error) { struct openflow_mod_requester req = { ofconn, oh }; error = handle_flow_mod__(ofproto, &fm, &req); minimatch_destroy(&fm.match); } ofpbuf_uninit(&ofpacts); return error; } static enum ofperr handle_flow_mod__(struct ofproto *ofproto, const struct ofputil_flow_mod *fm, const struct openflow_mod_requester *req) OVS_EXCLUDED(ofproto_mutex) { struct ofproto_flow_mod ofm; enum ofperr error; error = ofproto_flow_mod_init(ofproto, &ofm, fm, NULL); if (error) { return error; } ovs_mutex_lock(&ofproto_mutex); ofm.version = ofproto->tables_version + 1; error = ofproto_flow_mod_start(ofproto, &ofm); if (!error) { ofproto_bump_tables_version(ofproto); error = ofproto_flow_mod_finish(ofproto, &ofm, req); ofmonitor_flush(ofproto->connmgr); } ovs_mutex_unlock(&ofproto_mutex); return error; } static enum ofperr handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofputil_role_request request; struct ofputil_role_request reply; struct ofpbuf *buf; enum ofperr error; error = ofputil_decode_role_message(oh, &request); if (error) { return error; } if (request.role != OFPCR12_ROLE_NOCHANGE) { if (request.role != OFPCR12_ROLE_EQUAL && request.have_generation_id && !ofconn_set_primary_election_id(ofconn, request.generation_id)) { return OFPERR_OFPRRFC_STALE; } ofconn_set_role(ofconn, request.role); } reply.role = ofconn_get_role(ofconn); reply.have_generation_id = ofconn_get_primary_election_id( ofconn, &reply.generation_id); buf = ofputil_encode_role_reply(oh, &reply); ofconn_send_reply(ofconn, buf); return 0; } static enum ofperr handle_nxt_flow_mod_table_id(struct ofconn *ofconn, const struct ofp_header *oh) { bool enable = ofputil_decode_nx_flow_mod_table_id(oh); enum ofputil_protocol cur = ofconn_get_protocol(ofconn); ofconn_set_protocol(ofconn, ofputil_protocol_set_tid(cur, enable)); return 0; } static enum ofperr handle_nxt_set_flow_format(struct ofconn *ofconn, const struct ofp_header *oh) { enum ofputil_protocol next_base = ofputil_decode_nx_set_flow_format(oh); if (!next_base) { return OFPERR_OFPBRC_EPERM; } enum ofputil_protocol cur = ofconn_get_protocol(ofconn); ofconn_set_protocol(ofconn, ofputil_protocol_set_base(cur, next_base)); return 0; } static enum ofperr handle_nxt_set_packet_in_format(struct ofconn *ofconn, const struct ofp_header *oh) { enum ofputil_packet_in_format format; enum ofperr error = ofputil_decode_set_packet_in_format(oh, &format); if (!error) { ofconn_set_packet_in_format(ofconn, format); } return error; } static enum ofperr handle_nxt_set_async_config(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofputil_async_cfg basis = ofconn_get_async_config(ofconn); struct ofputil_async_cfg ac; enum ofperr error; error = ofputil_decode_set_async_config(oh, false, &basis, &ac); if (error) { return error; } ofconn_set_async_config(ofconn, &ac); if (ofconn_get_type(ofconn) == OFCONN_SERVICE && !ofconn_get_miss_send_len(ofconn)) { ofconn_set_miss_send_len(ofconn, OFP_DEFAULT_MISS_SEND_LEN); } return 0; } static enum ofperr handle_nxt_get_async_request(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofputil_async_cfg ac = ofconn_get_async_config(ofconn); ofconn_send_reply(ofconn, ofputil_encode_get_async_reply(oh, &ac)); return 0; } static enum ofperr handle_nxt_set_controller_id(struct ofconn *ofconn, const struct ofp_header *oh) { const struct nx_controller_id *nci = ofpmsg_body(oh); if (!is_all_zeros(nci->zero, sizeof nci->zero)) { return OFPERR_NXBRC_MUST_BE_ZERO; } ofconn_set_controller_id(ofconn, ntohs(nci->controller_id)); return 0; } static enum ofperr handle_barrier_request(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofpbuf *buf; buf = ofpraw_alloc_reply((oh->version == OFP10_VERSION ? OFPRAW_OFPT10_BARRIER_REPLY : OFPRAW_OFPT11_BARRIER_REPLY), oh, 0); ofconn_send_reply(ofconn, buf); return 0; } static void ofproto_compose_flow_refresh_update(const struct rule *rule, enum ofp14_flow_monitor_flags flags, struct ovs_list *msgs, const struct tun_table *tun_table, enum ofputil_protocol protocol) OVS_REQUIRES(ofproto_mutex) { const struct rule_actions *actions; struct ofputil_flow_update fu; fu.event = flags & OFPFMF_INITIAL ? OFPFME_INITIAL : flags & OFPFMF_ADD ? OFPFME_ADDED : OFPFME_MODIFIED; fu.reason = 0; ovs_mutex_lock(&rule->mutex); fu.idle_timeout = rule->idle_timeout; fu.hard_timeout = rule->hard_timeout; ovs_mutex_unlock(&rule->mutex); fu.table_id = rule->table_id; fu.cookie = rule->flow_cookie; minimatch_expand(&rule->cr.match, &fu.match); fu.priority = rule->cr.priority; actions = flags & OFPFMF_INSTRUCTIONS ? rule_get_actions(rule) : NULL; fu.ofpacts = actions ? actions->ofpacts : NULL; fu.ofpacts_len = actions ? actions->ofpacts_len : 0; if (ovs_list_is_empty(msgs)) { ofputil_start_flow_update(msgs, protocol); } ofputil_append_flow_update(&fu, msgs, tun_table); } void ofmonitor_compose_refresh_updates(struct rule_collection *rules, struct ovs_list *msgs, enum ofputil_protocol protocol) OVS_REQUIRES(ofproto_mutex) { struct rule *rule; RULE_COLLECTION_FOR_EACH (rule, rules) { enum ofp14_flow_monitor_flags flags = rule->monitor_flags; rule->monitor_flags = 0; ofproto_compose_flow_refresh_update(rule, flags, msgs, ofproto_get_tun_tab(rule->ofproto), protocol); } } static void ofproto_collect_ofmonitor_refresh_rule(const struct ofmonitor *m, struct rule *rule, uint64_t seqno, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { enum ofp14_flow_monitor_flags update; if (rule_is_hidden(rule)) { return; } if (!ofproto_rule_has_out_port(rule, m->out_port)) { return; } if (!ofproto_rule_has_out_group(rule, m->out_group)) { return; } if (seqno) { if (rule->add_seqno > seqno) { update = OFPFMF_ADD | OFPFMF_MODIFY; } else if (rule->modify_seqno > seqno) { update = OFPFMF_MODIFY; } else { return; } if (!(m->flags & update)) { return; } } else { update = OFPFMF_INITIAL; } if (!rule->monitor_flags) { rule_collection_add(rules, rule); } rule->monitor_flags |= update | (m->flags & OFPFMF_INSTRUCTIONS); } static void ofproto_collect_ofmonitor_refresh_rules(const struct ofmonitor *m, uint64_t seqno, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { const struct ofproto *ofproto = ofconn_get_ofproto(m->ofconn); const struct oftable *table; struct cls_rule target; cls_rule_init_from_minimatch(&target, &m->match, 0); FOR_EACH_MATCHING_TABLE (table, m->table_id, ofproto) { struct rule *rule; CLS_FOR_EACH_TARGET (rule, cr, &table->cls, &target, OVS_VERSION_MAX) { ofproto_collect_ofmonitor_refresh_rule(m, rule, seqno, rules); } } cls_rule_destroy(&target); } static void ofproto_collect_ofmonitor_initial_rules(struct ofmonitor *m, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { if (m->flags & OFPFMF_INITIAL) { ofproto_collect_ofmonitor_refresh_rules(m, 0, rules); } } void ofmonitor_collect_resume_rules(struct ofmonitor *m, uint64_t seqno, struct rule_collection *rules) OVS_REQUIRES(ofproto_mutex) { ofproto_collect_ofmonitor_refresh_rules(m, seqno, rules); } static enum ofperr flow_monitor_delete(struct ofconn *ofconn, uint32_t id) OVS_REQUIRES(ofproto_mutex) { struct ofmonitor *m; enum ofperr error; m = ofmonitor_lookup(ofconn, id); if (m) { ofmonitor_destroy(m); error = 0; } else { error = OFPERR_OFPMOFC_UNKNOWN_MONITOR; } return error; } static enum ofperr handle_flow_monitor_request(struct ofconn *ofconn, const struct ovs_list *msgs) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofmonitor **monitors = NULL; size_t allocated_monitors = 0; size_t n_monitors = 0; ovs_mutex_lock(&ofproto_mutex); struct ofpbuf *b; LIST_FOR_EACH (b, list_node, msgs) { for (;;) { enum ofperr error; struct ofputil_flow_monitor_request request; int retval = ofputil_decode_flow_monitor_request(&request, b); if (retval == EOF) { break; } else if (retval) { error = retval; goto error; } if (request.table_id != OFPTT_ALL && request.table_id >= ofproto->n_tables) { error = OFPERR_OFPBRC_BAD_TABLE_ID; goto error; } struct ofmonitor *m; switch (request.command) { case OFPFMC_ADD: { error = ofmonitor_create(&request, ofconn, &m); if (error) { goto error; } if (n_monitors >= allocated_monitors) { monitors = x2nrealloc(monitors, &allocated_monitors, sizeof *monitors); } monitors[n_monitors++] = m; break; } case OFPFMC_MODIFY: /* Modify operation is to delete old monitor and create a * new one. */ m = ofmonitor_lookup(ofconn, request.id); if (!m) { error = OFPERR_OFPMOFC_UNKNOWN_MONITOR; goto error; } ofmonitor_destroy(m); error = ofmonitor_create(&request, ofconn, &m); if (error) { goto error; } if (n_monitors >= allocated_monitors) { monitors = x2nrealloc(monitors, &allocated_monitors, sizeof *monitors); } monitors[n_monitors++] = m; break; case OFPFMC_DELETE: m = ofmonitor_lookup(ofconn, request.id); if (!m) { error = OFPERR_OFPMOFC_UNKNOWN_MONITOR; goto error; } ofmonitor_destroy(m); break; } continue; error: ofconn_send_error(ofconn, b->data, error); for (size_t i = 0; i < n_monitors; i++) { ofmonitor_destroy(monitors[i]); } free(monitors); ovs_mutex_unlock(&ofproto_mutex); return error; } } struct rule_collection rules; rule_collection_init(&rules); for (size_t i = 0; i < n_monitors; i++) { ofproto_collect_ofmonitor_initial_rules(monitors[i], &rules); } struct ovs_list replies; ofpmp_init(&replies, ofpbuf_from_list(ovs_list_back(msgs))->header); ofmonitor_compose_refresh_updates(&rules, &replies, ofconn_get_protocol(ofconn)); ovs_mutex_unlock(&ofproto_mutex); rule_collection_destroy(&rules); ofconn_send_replies(ofconn, &replies); free(monitors); return 0; } static enum ofperr handle_flow_monitor_cancel(struct ofconn *ofconn, const struct ofp_header *oh) OVS_EXCLUDED(ofproto_mutex) { enum ofperr error; uint32_t id; id = ofputil_decode_flow_monitor_cancel(oh); ovs_mutex_lock(&ofproto_mutex); error = flow_monitor_delete(ofconn, id); ovs_mutex_unlock(&ofproto_mutex); return error; } /* Meters implementation. * * Meter table entry, indexed by the OpenFlow meter_id. * 'created' is used to compute the duration for meter stats. * 'list rules' is needed so that we can delete the dependent rules when the * meter table entry is deleted. * 'provider_meter_id' is for the provider's private use. */ struct meter { struct hmap_node node; /* In ofproto->meters. */ long long int created; /* Time created. */ struct ovs_list rules; /* List of "struct rule_dpif"s. */ uint32_t id; /* OpenFlow meter_id. */ ofproto_meter_id provider_meter_id; uint16_t flags; /* Meter flags. */ uint16_t n_bands; /* Number of meter bands. */ struct ofputil_meter_band *bands; }; static struct meter * ofproto_get_meter(const struct ofproto *ofproto, uint32_t meter_id) { struct meter *meter; uint32_t hash = hash_int(meter_id, 0); HMAP_FOR_EACH_WITH_HASH (meter, node, hash, &ofproto->meters) { if (meter->id == meter_id) { return meter; } } return NULL; } static uint32_t * ofproto_upcall_meter_ptr(struct ofproto *ofproto, uint32_t meter_id) { switch(meter_id) { case OFPM13_SLOWPATH: return &ofproto->slowpath_meter_id; break; case OFPM13_CONTROLLER: return &ofproto->controller_meter_id; break; case OFPM13_ALL: OVS_NOT_REACHED(); default: return NULL; } } static void ofproto_add_meter(struct ofproto *ofproto, struct meter *meter) { uint32_t *upcall_meter_ptr = ofproto_upcall_meter_ptr(ofproto, meter->id); /* Cache datapath meter IDs of special meters. */ if (upcall_meter_ptr) { *upcall_meter_ptr = meter->provider_meter_id.uint32; } hmap_insert(&ofproto->meters, &meter->node, hash_int(meter->id, 0)); } /* * This is used in instruction validation at flow set-up time, to map * the OpenFlow meter ID to the corresponding datapath provider meter * ID. If either does not exist, returns false. Otherwise updates * the meter action and returns true. */ static bool ofproto_fix_meter_action(const struct ofproto *ofproto, struct ofpact_meter *ma) { if (ma->meter_id) { const struct meter *meter = ofproto_get_meter(ofproto, ma->meter_id); if (meter && meter->provider_meter_id.uint32 != UINT32_MAX) { /* Update the action with the provider's meter ID, so that we * do not need any synchronization between ofproto_dpif_xlate * and ofproto for meter table access. */ ma->provider_meter_id = meter->provider_meter_id.uint32; return true; } } return false; } /* This is used in instruction validation at flow set-up time, to map * the OpenFlow meter ID in a controller action to the corresponding * datapath provider meter ID. If either does not exist, sets the * provider meter id to a value to prevent the provider from using it * and returns false. Otherwise, updates the meter action and returns * true. */ static bool ofproto_fix_controller_action(const struct ofproto *ofproto, struct ofpact_controller *ca) { if (ca->meter_id == NX_CTLR_NO_METER) { ca->provider_meter_id = UINT32_MAX; return true; } const struct meter *meter = ofproto_get_meter(ofproto, ca->meter_id); if (meter && meter->provider_meter_id.uint32 != UINT32_MAX) { /* Update the action with the provider's meter ID, so that we * do not need any synchronization between ofproto_dpif_xlate * and ofproto for meter table access. */ ca->provider_meter_id = meter->provider_meter_id.uint32; return true; } /* Prevent the meter from being set by the ofproto provider. */ ca->provider_meter_id = UINT32_MAX; return false; } /* Finds the meter invoked by 'rule''s actions and adds 'rule' to the meter's * list of rules. */ static void meter_insert_rule(struct rule *rule) { const struct rule_actions *a = rule_get_actions(rule); uint32_t meter_id = ofpacts_get_meter(a->ofpacts, a->ofpacts_len); struct meter *meter = ofproto_get_meter(rule->ofproto, meter_id); ovs_list_insert(&meter->rules, &rule->meter_list_node); } static void meter_update(struct meter *meter, const struct ofputil_meter_config *config) { free(meter->bands); meter->flags = config->flags; meter->n_bands = config->n_bands; meter->bands = xmemdup(config->bands, config->n_bands * sizeof *meter->bands); } static struct meter * meter_create(const struct ofputil_meter_config *config, ofproto_meter_id provider_meter_id) { struct meter *meter; meter = xzalloc(sizeof *meter); meter->provider_meter_id = provider_meter_id; meter->created = time_msec(); meter->id = config->meter_id; ovs_list_init(&meter->rules); meter_update(meter, config); return meter; } static void meter_destroy(struct ofproto *ofproto, struct meter *meter) OVS_REQUIRES(ofproto_mutex) { uint32_t *upcall_meter_ptr; upcall_meter_ptr = ofproto_upcall_meter_ptr(ofproto, meter->id); if (upcall_meter_ptr) { *upcall_meter_ptr = UINT32_MAX; } if (!ovs_list_is_empty(&meter->rules)) { struct rule_collection rules; struct rule *rule; rule_collection_init(&rules); LIST_FOR_EACH (rule, meter_list_node, &meter->rules) { rule_collection_add(&rules, rule); } delete_flows__(&rules, OFPRR_METER_DELETE, NULL); } ofproto->ofproto_class->meter_del(ofproto, meter->provider_meter_id); free(meter->bands); free(meter); } static void meter_delete(struct ofproto *ofproto, uint32_t meter_id) OVS_REQUIRES(ofproto_mutex) { struct meter *meter = ofproto_get_meter(ofproto, meter_id); if (meter) { hmap_remove(&ofproto->meters, &meter->node); meter_destroy(ofproto, meter); } } static void meter_delete_all(struct ofproto *ofproto) OVS_REQUIRES(ofproto_mutex) { struct meter *meter; HMAP_FOR_EACH_SAFE (meter, node, &ofproto->meters) { hmap_remove(&ofproto->meters, &meter->node); meter_destroy(ofproto, meter); } } static enum ofperr handle_add_meter(struct ofproto *ofproto, struct ofputil_meter_mod *mm) { ofproto_meter_id provider_meter_id = { UINT32_MAX }; struct meter *meter = ofproto_get_meter(ofproto, mm->meter.meter_id); enum ofperr error; if (meter) { return OFPERR_OFPMMFC_METER_EXISTS; } error = ofproto->ofproto_class->meter_set(ofproto, &provider_meter_id, &mm->meter); if (!error) { ovs_assert(provider_meter_id.uint32 != UINT32_MAX); meter = meter_create(&mm->meter, provider_meter_id); ofproto_add_meter(ofproto, meter); } return error; } static enum ofperr handle_modify_meter(struct ofproto *ofproto, struct ofputil_meter_mod *mm) { struct meter *meter = ofproto_get_meter(ofproto, mm->meter.meter_id); enum ofperr error; uint32_t provider_meter_id; if (!meter) { return OFPERR_OFPMMFC_UNKNOWN_METER; } provider_meter_id = meter->provider_meter_id.uint32; error = ofproto->ofproto_class->meter_set(ofproto, &meter->provider_meter_id, &mm->meter); ovs_assert(meter->provider_meter_id.uint32 == provider_meter_id); if (!error) { meter_update(meter, &mm->meter); } return error; } static enum ofperr handle_delete_meter(struct ofconn *ofconn, struct ofputil_meter_mod *mm) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); uint32_t meter_id = mm->meter.meter_id; /* OpenFlow does not support Meter ID 0. */ if (meter_id) { ovs_mutex_lock(&ofproto_mutex); if (meter_id == OFPM13_ALL) { meter_delete_all(ofproto); } else { meter_delete(ofproto, meter_id); } ovs_mutex_unlock(&ofproto_mutex); } return 0; } static enum ofperr handle_meter_mod(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_meter_mod mm; uint64_t bands_stub[256 / 8]; struct ofpbuf bands; uint32_t meter_id; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } ofpbuf_use_stub(&bands, bands_stub, sizeof bands_stub); error = ofputil_decode_meter_mod(oh, &mm, &bands); if (error) { goto exit_free_bands; } meter_id = mm.meter.meter_id; if (mm.command != OFPMC13_DELETE) { /* Fails also when meters are not implemented by the provider. */ if (ofproto->meter_features.max_meters == 0) { error = OFPERR_OFPMMFC_INVALID_METER; goto exit_free_bands; } if (meter_id == 0) { error = OFPERR_OFPMMFC_INVALID_METER; goto exit_free_bands; } else if (meter_id > OFPM13_MAX) { switch(meter_id) { case OFPM13_SLOWPATH: case OFPM13_CONTROLLER: break; case OFPM13_ALL: default: error = OFPERR_OFPMMFC_INVALID_METER; goto exit_free_bands; } } if (mm.meter.n_bands > ofproto->meter_features.max_bands) { error = OFPERR_OFPMMFC_OUT_OF_BANDS; goto exit_free_bands; } } switch (mm.command) { case OFPMC13_ADD: error = handle_add_meter(ofproto, &mm); break; case OFPMC13_MODIFY: error = handle_modify_meter(ofproto, &mm); break; case OFPMC13_DELETE: error = handle_delete_meter(ofconn, &mm); break; default: error = OFPERR_OFPMMFC_BAD_COMMAND; break; } if (!error) { struct ofputil_requestforward rf; rf.xid = oh->xid; rf.reason = OFPRFR_METER_MOD; rf.meter_mod = &mm; connmgr_send_requestforward(ofproto->connmgr, ofconn, &rf); } exit_free_bands: ofpbuf_uninit(&bands); return error; } static enum ofperr handle_meter_features_request(struct ofconn *ofconn, const struct ofp_header *request) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_meter_features features; struct ofpbuf *b; if (ofproto->ofproto_class->meter_get_features) { ofproto->ofproto_class->meter_get_features(ofproto, &features); } else { memset(&features, 0, sizeof features); } b = ofputil_encode_meter_features_reply(&features, request); ofconn_send_reply(ofconn, b); return 0; } static void meter_request_reply(struct ofproto *ofproto, struct meter *meter, enum ofptype type, struct ovs_list *replies) { uint64_t bands_stub[256 / 8]; struct ofpbuf bands; ofpbuf_use_stub(&bands, bands_stub, sizeof bands_stub); if (type == OFPTYPE_METER_STATS_REQUEST) { struct ofputil_meter_stats stats; stats.meter_id = meter->id; /* Provider sets the packet and byte counts, we do the rest. */ stats.flow_count = ovs_list_size(&meter->rules); calc_duration(meter->created, time_msec(), &stats.duration_sec, &stats.duration_nsec); stats.n_bands = meter->n_bands; ofpbuf_clear(&bands); stats.bands = ofpbuf_put_uninit(&bands, meter->n_bands * sizeof *stats.bands); if (!ofproto->ofproto_class->meter_get(ofproto, meter->provider_meter_id, &stats, meter->n_bands)) { ofputil_append_meter_stats(replies, &stats); } } else { /* type == OFPTYPE_METER_CONFIG_REQUEST */ struct ofputil_meter_config config; config.meter_id = meter->id; config.flags = meter->flags; config.n_bands = meter->n_bands; config.bands = meter->bands; ofputil_append_meter_config(replies, &config); } ofpbuf_uninit(&bands); } static void meter_request_reply_all(struct ofproto *ofproto, enum ofptype type, struct ovs_list *replies) { struct meter *meter; HMAP_FOR_EACH (meter, node, &ofproto->meters) { meter_request_reply(ofproto, meter, type, replies); } } static enum ofperr handle_meter_request(struct ofconn *ofconn, const struct ofp_header *request, enum ofptype type) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ovs_list replies; uint32_t meter_id; struct meter *meter; ofputil_decode_meter_request(request, &meter_id); if (meter_id != OFPM13_ALL) { meter = ofproto_get_meter(ofproto, meter_id); if (!meter) { /* Meter does not exist. */ return OFPERR_OFPMMFC_UNKNOWN_METER; } } else { /* GCC 4.9.2 complains about 'meter' can potentially be used * uninitialized. Logically, this is a false alarm since * meter is only used when meter_id != OFPM13_ALL. * Set NULL to make compiler happy. */ meter = NULL; } ofpmp_init(&replies, request); if (meter_id == OFPM13_ALL) { meter_request_reply_all(ofproto, type, &replies); } else { meter_request_reply(ofproto, meter, type, &replies); } ofconn_send_replies(ofconn, &replies); return 0; } /* Returned group is RCU protected. */ static struct ofgroup * ofproto_group_lookup__(const struct ofproto *ofproto, uint32_t group_id, ovs_version_t version) { struct ofgroup *group; CMAP_FOR_EACH_WITH_HASH (group, cmap_node, hash_int(group_id, 0), &ofproto->groups) { if (group->group_id == group_id && versions_visible_in_version(&group->versions, version)) { return group; } } return NULL; } /* If the group exists, this function increments the groups's reference count. * * Make sure to call ofproto_group_unref() after no longer needing to maintain * a reference to the group. */ struct ofgroup * ofproto_group_lookup(const struct ofproto *ofproto, uint32_t group_id, ovs_version_t version, bool take_ref) { struct ofgroup *group; group = ofproto_group_lookup__(ofproto, group_id, version); if (group && take_ref) { /* Not holding a lock, so it is possible that another thread releases * the last reference just before we manage to get one. */ return ofproto_group_try_ref(group) ? group : NULL; } return group; } /* Caller should hold 'ofproto_mutex' if it is important that the * group is not removed by someone else. */ static bool ofproto_group_exists(const struct ofproto *ofproto, uint32_t group_id) { return ofproto_group_lookup__(ofproto, group_id, OVS_VERSION_MAX) != NULL; } static void group_add_rule(struct ofgroup *group, struct rule *rule) { rule_collection_add(&group->rules, rule); } static void group_remove_rule(struct ofgroup *group, struct rule *rule) { rule_collection_remove(&group->rules, rule); } static void append_group_stats(struct ofgroup *group, struct ovs_list *replies) OVS_REQUIRES(ofproto_mutex) { struct ofputil_group_stats ogs; const struct ofproto *ofproto = group->ofproto; long long int now = time_msec(); int error; ogs.bucket_stats = xmalloc(group->n_buckets * sizeof *ogs.bucket_stats); /* Provider sets the packet and byte counts, we do the rest. */ ogs.ref_count = rule_collection_n(&group->rules); ogs.n_buckets = group->n_buckets; error = (ofproto->ofproto_class->group_get_stats ? ofproto->ofproto_class->group_get_stats(group, &ogs) : EOPNOTSUPP); if (error) { ogs.packet_count = UINT64_MAX; ogs.byte_count = UINT64_MAX; memset(ogs.bucket_stats, 0xff, ogs.n_buckets * sizeof *ogs.bucket_stats); } ogs.group_id = group->group_id; calc_duration(group->created, now, &ogs.duration_sec, &ogs.duration_nsec); ofputil_append_group_stats(replies, &ogs); free(ogs.bucket_stats); } static void handle_group_request(struct ofconn *ofconn, const struct ofp_header *request, uint32_t group_id, void (*cb)(struct ofgroup *, struct ovs_list *replies)) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofgroup *group; struct ovs_list replies; ofpmp_init(&replies, request); /* Must exclude modifications to guarantee iterating groups. */ ovs_mutex_lock(&ofproto_mutex); if (group_id == OFPG_ALL) { CMAP_FOR_EACH (group, cmap_node, &ofproto->groups) { if (versions_visible_in_version(&group->versions, OVS_VERSION_MAX)) { cb(group, &replies); } } } else { group = ofproto_group_lookup__(ofproto, group_id, OVS_VERSION_MAX); if (group) { cb(group, &replies); } } ovs_mutex_unlock(&ofproto_mutex); ofconn_send_replies(ofconn, &replies); } static enum ofperr handle_group_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { uint32_t group_id; enum ofperr error; error = ofputil_decode_group_stats_request(request, &group_id); if (error) { return error; } handle_group_request(ofconn, request, group_id, append_group_stats); return 0; } static void append_group_desc(struct ofgroup *group, struct ovs_list *replies) { struct ofputil_group_desc gds; gds.group_id = group->group_id; gds.type = group->type; gds.props = group->props; ofputil_append_group_desc_reply(&gds, &group->buckets, replies); } static enum ofperr handle_group_desc_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { handle_group_request(ofconn, request, ofputil_decode_group_desc_request(request), append_group_desc); return 0; } static enum ofperr handle_group_features_stats_request(struct ofconn *ofconn, const struct ofp_header *request) { struct ofproto *p = ofconn_get_ofproto(ofconn); struct ofpbuf *msg; msg = ofputil_encode_group_features_reply(&p->ogf, request); if (msg) { ofconn_send_reply(ofconn, msg); } return 0; } static void put_queue_get_config_reply(struct ofport *port, uint32_t queue, struct ovs_list *replies) { struct ofputil_queue_config qc; /* None of the existing queues have compatible properties, so we hard-code * omitting min_rate and max_rate. */ qc.port = port->ofp_port; qc.queue = queue; qc.min_rate = UINT16_MAX; qc.max_rate = UINT16_MAX; ofputil_append_queue_get_config_reply(&qc, replies); } static int handle_queue_get_config_request_for_port(struct ofport *port, uint32_t queue, struct ovs_list *replies) { struct smap details = SMAP_INITIALIZER(&details); if (queue != OFPQ_ALL) { int error = netdev_get_queue(port->netdev, queue, &details); switch (error) { case 0: put_queue_get_config_reply(port, queue, replies); break; case EOPNOTSUPP: case EINVAL: return OFPERR_OFPQOFC_BAD_QUEUE; default: return OFPERR_NXQOFC_QUEUE_ERROR; } } else { struct netdev_queue_dump queue_dump; uint32_t queue_id; NETDEV_QUEUE_FOR_EACH (&queue_id, &details, &queue_dump, port->netdev) { put_queue_get_config_reply(port, queue_id, replies); } } smap_destroy(&details); return 0; } static enum ofperr handle_queue_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ovs_list replies; struct ofport *port; ofp_port_t req_port; uint32_t req_queue; enum ofperr error; error = ofputil_decode_queue_get_config_request(oh, &req_port, &req_queue); if (error) { return error; } ofputil_start_queue_get_config_reply(oh, &replies); if (req_port == OFPP_ANY) { error = OFPERR_OFPQOFC_BAD_QUEUE; HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) { if (!handle_queue_get_config_request_for_port(port, req_queue, &replies)) { error = 0; } } } else { port = ofproto_get_port(ofproto, req_port); error = (port ? handle_queue_get_config_request_for_port(port, req_queue, &replies) : OFPERR_OFPQOFC_BAD_PORT); } if (!error) { ofconn_send_replies(ofconn, &replies); } else { ofpbuf_list_delete(&replies); } return error; } /* Allocates, initializes, and constructs a new group in 'ofproto', obtaining * all the attributes for it from 'gm', and stores a pointer to it in * '*ofgroup'. Makes the new group visible from the flow table starting from * 'version'. * * Returns 0 if successful, otherwise an error code. If there is an error then * '*ofgroup' is indeterminate upon return. */ static enum ofperr init_group(struct ofproto *ofproto, const struct ofputil_group_mod *gm, ovs_version_t version, struct ofgroup **ofgroup) { enum ofperr error; const long long int now = time_msec(); if (gm->group_id > OFPG_MAX) { return OFPERR_OFPGMFC_INVALID_GROUP; } if (gm->type > OFPGT11_FF) { return OFPERR_OFPGMFC_BAD_TYPE; } if (!ofproto_try_ref(ofproto)) { return OFPERR_OFPFMFC_UNKNOWN; } *ofgroup = ofproto->ofproto_class->group_alloc(); if (!*ofgroup) { ofproto_unref(ofproto); VLOG_WARN_RL(&rl, "%s: failed to allocate group", ofproto->name); return OFPERR_OFPGMFC_OUT_OF_GROUPS; } *CONST_CAST(struct ofproto **, &(*ofgroup)->ofproto) = ofproto; *CONST_CAST(uint32_t *, &((*ofgroup)->group_id)) = gm->group_id; *CONST_CAST(enum ofp11_group_type *, &(*ofgroup)->type) = gm->type; *CONST_CAST(long long int *, &((*ofgroup)->created)) = now; *CONST_CAST(long long int *, &((*ofgroup)->modified)) = now; ovs_refcount_init(&(*ofgroup)->ref_count); (*ofgroup)->being_deleted = false; ovs_list_init(CONST_CAST(struct ovs_list *, &(*ofgroup)->buckets)); ofputil_bucket_clone_list(CONST_CAST(struct ovs_list *, &(*ofgroup)->buckets), &gm->buckets, NULL); *CONST_CAST(uint32_t *, &(*ofgroup)->n_buckets) = ovs_list_size(&(*ofgroup)->buckets); ofputil_group_properties_copy(CONST_CAST(struct ofputil_group_props *, &(*ofgroup)->props), &gm->props); rule_collection_init(&(*ofgroup)->rules); /* Make group visible from 'version'. */ (*ofgroup)->versions = VERSIONS_INITIALIZER(version, OVS_VERSION_NOT_REMOVED); /* Construct called BEFORE any locks are held. */ error = ofproto->ofproto_class->group_construct(*ofgroup); if (error) { ofputil_group_properties_destroy(CONST_CAST(struct ofputil_group_props *, &(*ofgroup)->props)); ofputil_bucket_list_destroy(CONST_CAST(struct ovs_list *, &(*ofgroup)->buckets)); ofproto_unref(ofproto); ofproto->ofproto_class->group_dealloc(*ofgroup); } return error; } /* Implements the OFPGC11_ADD operation specified by 'gm', adding a group to * 'ofproto''s group table. Returns 0 on success or an OpenFlow error code on * failure. */ static enum ofperr add_group_start(struct ofproto *ofproto, struct ofproto_group_mod *ogm) OVS_REQUIRES(ofproto_mutex) { enum ofperr error; if (ofproto_group_exists(ofproto, ogm->gm.group_id)) { return OFPERR_OFPGMFC_GROUP_EXISTS; } if (ofproto->n_groups[ogm->gm.type] >= ofproto->ogf.max_groups[ogm->gm.type]) { return OFPERR_OFPGMFC_OUT_OF_GROUPS; } /* Allocate new group and initialize it. */ error = init_group(ofproto, &ogm->gm, ogm->version, &ogm->new_group); if (!error) { /* Insert new group. */ cmap_insert(&ofproto->groups, &ogm->new_group->cmap_node, hash_int(ogm->new_group->group_id, 0)); ofproto->n_groups[ogm->new_group->type]++; } return error; } /* Adds all of the buckets from 'ofgroup' to 'new_ofgroup'. The buckets * already in 'new_ofgroup' will be placed just after the (copy of the) bucket * in 'ofgroup' with bucket ID 'command_bucket_id'. Special * 'command_bucket_id' values OFPG15_BUCKET_FIRST and OFPG15_BUCKET_LAST are * also honored. */ static enum ofperr copy_buckets_for_insert_bucket(const struct ofgroup *ofgroup, struct ofgroup *new_ofgroup, uint32_t command_bucket_id) { struct ofputil_bucket *last = NULL; if (command_bucket_id <= OFPG15_BUCKET_MAX) { /* Check here to ensure that a bucket corresponding to * command_bucket_id exists in the old bucket list. * * The subsequent search of below of new_ofgroup covers * both buckets in the old bucket list and buckets added * by the insert buckets group mod message this function processes. */ if (!ofputil_bucket_find(&ofgroup->buckets, command_bucket_id)) { return OFPERR_OFPGMFC_UNKNOWN_BUCKET; } if (!ovs_list_is_empty(&new_ofgroup->buckets)) { last = ofputil_bucket_list_back(&new_ofgroup->buckets); } } ofputil_bucket_clone_list(CONST_CAST(struct ovs_list *, &new_ofgroup->buckets), &ofgroup->buckets, NULL); if (ofputil_bucket_check_duplicate_id(&new_ofgroup->buckets)) { VLOG_INFO_RL(&rl, "Duplicate bucket id"); return OFPERR_OFPGMFC_BUCKET_EXISTS; } /* Rearrange list according to command_bucket_id */ if (command_bucket_id == OFPG15_BUCKET_LAST) { if (!ovs_list_is_empty(&ofgroup->buckets)) { struct ofputil_bucket *new_first; const struct ofputil_bucket *first; first = ofputil_bucket_list_front(&ofgroup->buckets); new_first = ofputil_bucket_find(&new_ofgroup->buckets, first->bucket_id); ovs_list_splice(new_ofgroup->buckets.next, &new_first->list_node, CONST_CAST(struct ovs_list *, &new_ofgroup->buckets)); } } else if (command_bucket_id <= OFPG15_BUCKET_MAX && last) { struct ofputil_bucket *after; /* Presence of bucket is checked above so after should never be NULL */ after = ofputil_bucket_find(&new_ofgroup->buckets, command_bucket_id); ovs_list_splice(after->list_node.next, new_ofgroup->buckets.next, last->list_node.next); } return 0; } /* Appends all of the a copy of all the buckets from 'ofgroup' to 'new_ofgroup' * with the exception of the bucket whose bucket id is 'command_bucket_id'. * Special 'command_bucket_id' values OFPG15_BUCKET_FIRST, OFPG15_BUCKET_LAST * and OFPG15_BUCKET_ALL are also honored. */ static enum ofperr copy_buckets_for_remove_bucket(const struct ofgroup *ofgroup, struct ofgroup *new_ofgroup, uint32_t command_bucket_id) { const struct ofputil_bucket *skip = NULL; if (command_bucket_id == OFPG15_BUCKET_ALL) { return 0; } if (command_bucket_id == OFPG15_BUCKET_FIRST) { if (!ovs_list_is_empty(&ofgroup->buckets)) { skip = ofputil_bucket_list_front(&ofgroup->buckets); } } else if (command_bucket_id == OFPG15_BUCKET_LAST) { if (!ovs_list_is_empty(&ofgroup->buckets)) { skip = ofputil_bucket_list_back(&ofgroup->buckets); } } else { skip = ofputil_bucket_find(&ofgroup->buckets, command_bucket_id); if (!skip) { return OFPERR_OFPGMFC_UNKNOWN_BUCKET; } } ofputil_bucket_clone_list(CONST_CAST(struct ovs_list *, &new_ofgroup->buckets), &ofgroup->buckets, skip); return 0; } /* Implements OFPGC11_MODIFY, OFPGC15_INSERT_BUCKET and * OFPGC15_REMOVE_BUCKET. Returns 0 on success or an OpenFlow error code * on failure. * * Note that the group is re-created and then replaces the old group in * ofproto's ofgroup hash map. Thus, the group is never altered while users of * the xlate module hold a pointer to the group. */ static enum ofperr modify_group_start(struct ofproto *ofproto, struct ofproto_group_mod *ogm) OVS_REQUIRES(ofproto_mutex) { struct ofgroup *old_group; /* Modified group. */ struct ofgroup *new_group; enum ofperr error; old_group = ofproto_group_lookup__(ofproto, ogm->gm.group_id, OVS_VERSION_MAX); if (!old_group) { return OFPERR_OFPGMFC_UNKNOWN_GROUP; } /* Inserting or deleting a bucket should not change the group's type or * properties, so change the group mod so that these aspects match the old * group. (See EXT-570.) */ if (ogm->gm.command == OFPGC15_INSERT_BUCKET || ogm->gm.command == OFPGC15_REMOVE_BUCKET) { ogm->gm.type = old_group->type; ofputil_group_properties_destroy(&ogm->gm.props); ofputil_group_properties_copy(&ogm->gm.props, &old_group->props); } if (old_group->type != ogm->gm.type && (ofproto->n_groups[ogm->gm.type] >= ofproto->ogf.max_groups[ogm->gm.type])) { return OFPERR_OFPGMFC_OUT_OF_GROUPS; } error = init_group(ofproto, &ogm->gm, ogm->version, &ogm->new_group); if (error) { return error; } new_group = ogm->new_group; /* Manipulate bucket list for bucket commands */ if (ogm->gm.command == OFPGC15_INSERT_BUCKET) { error = copy_buckets_for_insert_bucket(old_group, new_group, ogm->gm.command_bucket_id); } else if (ogm->gm.command == OFPGC15_REMOVE_BUCKET) { error = copy_buckets_for_remove_bucket(old_group, new_group, ogm->gm.command_bucket_id); } if (error) { goto out; } /* The group creation time does not change during modification. */ *CONST_CAST(long long int *, &(new_group->created)) = old_group->created; *CONST_CAST(long long int *, &(new_group->modified)) = time_msec(); *CONST_CAST(uint32_t *, &(new_group->n_buckets)) = ovs_list_size(&(new_group->buckets)); group_collection_add(&ogm->old_groups, old_group); /* Mark the old group for deletion. */ versions_set_remove_version(&old_group->versions, ogm->version); /* Insert replacement group. */ cmap_insert(&ofproto->groups, &new_group->cmap_node, hash_int(new_group->group_id, 0)); /* Transfer rules. */ rule_collection_move(&new_group->rules, &old_group->rules); if (old_group->type != new_group->type) { ofproto->n_groups[old_group->type]--; ofproto->n_groups[new_group->type]++; } return 0; out: ofproto_group_unref(new_group); return error; } /* Implements the OFPGC11_ADD_OR_MOD command which creates the group when it does not * exist yet and modifies it otherwise */ static enum ofperr add_or_modify_group_start(struct ofproto *ofproto, struct ofproto_group_mod *ogm) OVS_REQUIRES(ofproto_mutex) { enum ofperr error; if (!ofproto_group_exists(ofproto, ogm->gm.group_id)) { error = add_group_start(ofproto, ogm); } else { error = modify_group_start(ofproto, ogm); } return error; } static void delete_group_start(struct ofproto *ofproto, ovs_version_t version, struct group_collection *groups, struct ofgroup *group) OVS_REQUIRES(ofproto_mutex) { /* Makes flow deletion code leave the rule pointers in 'group->rules' * intact, so that we can later refer to the rules deleted due to the group * deletion. Rule pointers will be removed from all other groups, if any, * so we will never try to delete the same rule twice. */ group->being_deleted = true; /* Mark all the referring groups for deletion. */ delete_flows_start__(ofproto, version, &group->rules); group_collection_add(groups, group); versions_set_remove_version(&group->versions, version); ofproto->n_groups[group->type]--; } static void delete_group_finish(struct ofproto *ofproto, struct ofgroup *group) OVS_REQUIRES(ofproto_mutex) { /* Finish deletion of all flow entries containing this group in a group * action. */ delete_flows_finish__(ofproto, &group->rules, OFPRR_GROUP_DELETE, NULL); /* Group removal is postponed by the caller. */ } /* Implements OFPGC11_DELETE. */ static void delete_groups_start(struct ofproto *ofproto, struct ofproto_group_mod *ogm) OVS_REQUIRES(ofproto_mutex) { struct ofgroup *group; if (ogm->gm.group_id == OFPG_ALL) { CMAP_FOR_EACH (group, cmap_node, &ofproto->groups) { if (versions_visible_in_version(&group->versions, ogm->version)) { delete_group_start(ofproto, ogm->version, &ogm->old_groups, group); } } } else { group = ofproto_group_lookup__(ofproto, ogm->gm.group_id, ogm->version); if (group) { delete_group_start(ofproto, ogm->version, &ogm->old_groups, group); } } } static enum ofperr ofproto_group_mod_start(struct ofproto *ofproto, struct ofproto_group_mod *ogm) OVS_REQUIRES(ofproto_mutex) { enum ofperr error; ogm->new_group = NULL; group_collection_init(&ogm->old_groups); switch (ogm->gm.command) { case OFPGC11_ADD: error = add_group_start(ofproto, ogm); break; case OFPGC11_MODIFY: error = modify_group_start(ofproto, ogm); break; case OFPGC11_ADD_OR_MOD: error = add_or_modify_group_start(ofproto, ogm); break; case OFPGC11_DELETE: delete_groups_start(ofproto, ogm); error = 0; break; case OFPGC15_INSERT_BUCKET: error = modify_group_start(ofproto, ogm); break; case OFPGC15_REMOVE_BUCKET: error = modify_group_start(ofproto, ogm); break; default: if (ogm->gm.command > OFPGC11_DELETE) { VLOG_INFO_RL(&rl, "%s: Invalid group_mod command type %d", ofproto->name, ogm->gm.command); } error = OFPERR_OFPGMFC_BAD_COMMAND; break; } return error; } static void ofproto_group_mod_revert(struct ofproto *ofproto, struct ofproto_group_mod *ogm) OVS_REQUIRES(ofproto_mutex) { struct ofgroup *new_group = ogm->new_group; struct ofgroup *old_group; /* Restore replaced or deleted groups. */ GROUP_COLLECTION_FOR_EACH (old_group, &ogm->old_groups) { ofproto->n_groups[old_group->type]++; if (new_group) { ovs_assert(group_collection_n(&ogm->old_groups) == 1); /* Transfer rules back. */ rule_collection_move(&old_group->rules, &new_group->rules); } else { old_group->being_deleted = false; /* Revert rule deletion. */ delete_flows_revert__(ofproto, &old_group->rules); } /* Restore visibility. */ versions_set_remove_version(&old_group->versions, OVS_VERSION_NOT_REMOVED); } if (new_group) { /* Remove the new group immediately. It was never visible to * lookups. */ cmap_remove(&ofproto->groups, &new_group->cmap_node, hash_int(new_group->group_id, 0)); ofproto->n_groups[new_group->type]--; ofproto_group_unref(new_group); } } static void ofproto_group_mod_finish(struct ofproto *ofproto, struct ofproto_group_mod *ogm, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { struct ofgroup *new_group = ogm->new_group; struct ofgroup *old_group; if (new_group && group_collection_n(&ogm->old_groups) && ofproto->ofproto_class->group_modify) { /* Modify a group. */ ovs_assert(group_collection_n(&ogm->old_groups) == 1); /* XXX: OK to lose old group's stats? */ ofproto->ofproto_class->group_modify(new_group); } /* Delete old groups. */ GROUP_COLLECTION_FOR_EACH(old_group, &ogm->old_groups) { delete_group_finish(ofproto, old_group); } remove_groups_postponed(&ogm->old_groups); if (req) { struct ofputil_requestforward rf; rf.xid = req->request->xid; rf.reason = OFPRFR_GROUP_MOD; rf.group_mod = &ogm->gm; rf.new_buckets = new_group ? &new_group->buckets : NULL; rf.group_existed = group_collection_n(&ogm->old_groups) > 0; connmgr_send_requestforward(ofproto->connmgr, req->ofconn, &rf); } } /* Delete all groups from 'ofproto'. * * This is intended for use within an ofproto provider's 'destruct' * function. */ static void ofproto_group_delete_all__(struct ofproto *ofproto) OVS_REQUIRES(ofproto_mutex) { struct ofproto_group_mod ogm; ogm.gm.command = OFPGC11_DELETE; ogm.gm.group_id = OFPG_ALL; ogm.version = ofproto->tables_version + 1; ofproto_group_mod_start(ofproto, &ogm); ofproto_bump_tables_version(ofproto); ofproto_group_mod_finish(ofproto, &ogm, NULL); } /* Delete all groups from 'ofproto'. * * This is intended for use within an ofproto provider's 'destruct' * function. */ void ofproto_group_delete_all(struct ofproto *ofproto) OVS_EXCLUDED(ofproto_mutex) { ovs_mutex_lock(&ofproto_mutex); ofproto_group_delete_all__(ofproto); ovs_mutex_unlock(&ofproto_mutex); } static enum ofperr handle_group_mod(struct ofconn *ofconn, const struct ofp_header *oh) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofproto_group_mod ogm; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } error = ofputil_decode_group_mod(oh, &ogm.gm); if (error) { return error; } ovs_mutex_lock(&ofproto_mutex); ogm.version = ofproto->tables_version + 1; error = ofproto_group_mod_start(ofproto, &ogm); if (!error) { struct openflow_mod_requester req = { ofconn, oh }; ofproto_bump_tables_version(ofproto); ofproto_group_mod_finish(ofproto, &ogm, &req); ofmonitor_flush(ofproto->connmgr); } ovs_mutex_unlock(&ofproto_mutex); ofputil_uninit_group_mod(&ogm.gm); return error; } enum ofputil_table_miss ofproto_table_get_miss_config(const struct ofproto *ofproto, uint8_t table_id) { enum ofputil_table_miss miss; atomic_read_relaxed(&ofproto->tables[table_id].miss_config, &miss); return miss; } static void table_mod__(struct oftable *oftable, const struct ofputil_table_mod *tm) { if (tm->miss == OFPUTIL_TABLE_MISS_DEFAULT) { /* This is how an OFPT_TABLE_MOD decodes if it doesn't specify any * table-miss configuration (because the protocol used doesn't have * such a concept), so there's nothing to do. */ } else { atomic_store_relaxed(&oftable->miss_config, tm->miss); } unsigned int new_eviction = oftable->eviction; if (tm->eviction == OFPUTIL_TABLE_EVICTION_ON) { new_eviction |= EVICTION_OPENFLOW; } else if (tm->eviction == OFPUTIL_TABLE_EVICTION_OFF) { new_eviction &= ~EVICTION_OPENFLOW; } if (new_eviction != oftable->eviction) { ovs_mutex_lock(&ofproto_mutex); oftable_configure_eviction(oftable, new_eviction, oftable->eviction_fields, oftable->n_eviction_fields); ovs_mutex_unlock(&ofproto_mutex); } if (tm->vacancy != OFPUTIL_TABLE_VACANCY_DEFAULT) { ovs_mutex_lock(&ofproto_mutex); oftable->vacancy_down = tm->table_vacancy.vacancy_down; oftable->vacancy_up = tm->table_vacancy.vacancy_up; if (tm->vacancy == OFPUTIL_TABLE_VACANCY_OFF) { oftable->vacancy_event = 0; } else if (!oftable->vacancy_event) { uint8_t vacancy = oftable_vacancy(oftable); oftable->vacancy_event = (vacancy < oftable->vacancy_up ? OFPTR_VACANCY_UP : OFPTR_VACANCY_DOWN); } ovs_mutex_unlock(&ofproto_mutex); } } static enum ofperr table_mod(struct ofproto *ofproto, const struct ofputil_table_mod *tm) { if (!check_table_id(ofproto, tm->table_id)) { return OFPERR_OFPTMFC_BAD_TABLE; } /* Don't allow the eviction flags to be changed (except to the only fixed * value that OVS supports). OF1.4 says this is normal: "The * OFPTMPT_EVICTION property usually cannot be modified using a * OFP_TABLE_MOD request, because the eviction mechanism is switch * defined". */ if (tm->eviction_flags != UINT32_MAX && tm->eviction_flags != OFPROTO_EVICTION_FLAGS) { return OFPERR_OFPTMFC_BAD_CONFIG; } if (tm->table_id == OFPTT_ALL) { struct oftable *oftable; OFPROTO_FOR_EACH_TABLE (oftable, ofproto) { if (!(oftable->flags & (OFTABLE_HIDDEN | OFTABLE_READONLY))) { table_mod__(oftable, tm); } } } else { struct oftable *oftable = &ofproto->tables[tm->table_id]; if (oftable->flags & OFTABLE_READONLY) { return OFPERR_OFPTMFC_EPERM; } table_mod__(oftable, tm); } return 0; } static enum ofperr handle_table_mod(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_table_mod tm; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } error = ofputil_decode_table_mod(oh, &tm); if (error) { return error; } return table_mod(ofproto, &tm); } /* Free resources that may be allocated by ofproto_flow_mod_init(). */ void ofproto_flow_mod_uninit(struct ofproto_flow_mod *ofm) { if (ofm->temp_rule) { ofproto_rule_unref(ofm->temp_rule); ofm->temp_rule = NULL; } if (ofm->criteria.version != OVS_VERSION_NOT_REMOVED) { rule_criteria_destroy(&ofm->criteria); } if (ofm->conjs) { free(ofm->conjs); ofm->conjs = NULL; ofm->n_conjs = 0; } } /* Initializes 'ofm' with 'ofproto', 'fm', and 'rule'. 'rule' may be null, but * if it is nonnull then the caller must own a reference to it, which on * success is transferred to 'ofm' and on failure is unreffed. */ static enum ofperr ofproto_flow_mod_init(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct ofputil_flow_mod *fm, struct rule *rule) OVS_EXCLUDED(ofproto_mutex) { enum ofperr error; /* Forward flow mod fields we need later. */ ofm->command = fm->command; ofm->modify_cookie = fm->modify_cookie; ofm->modify_may_add_flow = (fm->new_cookie != OVS_BE64_MAX && fm->cookie_mask == htonll(0)); /* Old flags must be kept when modifying a flow, but we still must * honor the reset counts flag if present in the flow mod. */ ofm->modify_keep_counts = !(fm->flags & OFPUTIL_FF_RESET_COUNTS); /* Initialize state needed by ofproto_flow_mod_uninit(). */ ofm->temp_rule = rule; ofm->criteria.version = OVS_VERSION_NOT_REMOVED; ofm->conjs = NULL; ofm->n_conjs = 0; ofm->table_id = fm->table_id; bool check_buffer_id = false; switch (ofm->command) { case OFPFC_ADD: check_buffer_id = true; error = add_flow_init(ofproto, ofm, fm); break; case OFPFC_MODIFY: check_buffer_id = true; error = modify_flows_init_loose(ofproto, ofm, fm); break; case OFPFC_MODIFY_STRICT: check_buffer_id = true; error = modify_flow_init_strict(ofproto, ofm, fm); break; case OFPFC_DELETE: error = delete_flows_init_loose(ofproto, ofm, fm); break; case OFPFC_DELETE_STRICT: error = delete_flows_init_strict(ofproto, ofm, fm); break; default: error = OFPERR_OFPFMFC_BAD_COMMAND; break; } if (!error && check_buffer_id && fm->buffer_id != UINT32_MAX) { error = OFPERR_OFPBRC_BUFFER_UNKNOWN; } if (error) { ofproto_flow_mod_uninit(ofm); } return error; } static enum ofperr ofproto_flow_mod_start(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { enum ofperr error; rule_collection_init(&ofm->old_rules); rule_collection_init(&ofm->new_rules); switch (ofm->command) { case OFPFC_ADD: error = add_flow_start(ofproto, ofm); break; case OFPFC_MODIFY: error = modify_flows_start_loose(ofproto, ofm); break; case OFPFC_MODIFY_STRICT: error = modify_flow_start_strict(ofproto, ofm); break; case OFPFC_DELETE: error = delete_flows_start_loose(ofproto, ofm); break; case OFPFC_DELETE_STRICT: error = delete_flow_start_strict(ofproto, ofm); break; default: OVS_NOT_REACHED(); } /* Release resources not needed after start. */ ofproto_flow_mod_uninit(ofm); if (error) { rule_collection_destroy(&ofm->old_rules); rule_collection_destroy(&ofm->new_rules); } return error; } static void ofproto_flow_mod_revert(struct ofproto *ofproto, struct ofproto_flow_mod *ofm) OVS_REQUIRES(ofproto_mutex) { switch (ofm->command) { case OFPFC_ADD: add_flow_revert(ofproto, ofm); break; case OFPFC_MODIFY: case OFPFC_MODIFY_STRICT: modify_flows_revert(ofproto, ofm); break; case OFPFC_DELETE: case OFPFC_DELETE_STRICT: delete_flows_revert(ofproto, ofm); break; default: break; } rule_collection_destroy(&ofm->old_rules); rule_collection_destroy(&ofm->new_rules); } static enum ofperr ofproto_flow_mod_finish(struct ofproto *ofproto, struct ofproto_flow_mod *ofm, const struct openflow_mod_requester *req) OVS_REQUIRES(ofproto_mutex) { enum ofperr error = 0; switch (ofm->command) { case OFPFC_ADD: error = add_flow_finish(ofproto, ofm, req); break; case OFPFC_MODIFY: case OFPFC_MODIFY_STRICT: error = modify_flows_finish(ofproto, ofm, req); break; case OFPFC_DELETE: case OFPFC_DELETE_STRICT: delete_flows_finish(ofproto, ofm, req); break; default: break; } rule_collection_destroy(&ofm->old_rules); rule_collection_destroy(&ofm->new_rules); if (req) { ofconn_report_flow_mod(req->ofconn, ofm->command); } return error; } static void ofproto_table_classifier_defer(struct ofproto *ofproto, const struct ofproto_flow_mod *ofm) { if (check_table_id(ofproto, ofm->table_id)) { if (ofm->table_id == OFPTT_ALL) { struct oftable *table; OFPROTO_FOR_EACH_TABLE (table, ofproto) { classifier_defer(&table->cls); } } else { classifier_defer(&ofproto->tables[ofm->table_id].cls); } } } static void ofproto_publish_classifiers(struct ofproto *ofproto) { struct oftable *table; OFPROTO_FOR_EACH_TABLE (table, ofproto) { classifier_publish(&table->cls); } } /* Commit phases (all while locking ofproto_mutex): * * 1. Begin: Gather resources and make changes visible in the next version. * - Mark affected rules for removal in the next version. * - Create new replacement rules, make visible in the next * version. * - Do not send any events or notifications. * * 2. Revert: Fail if any errors are found. After this point no errors are * possible. No visible changes were made, so rollback is minimal (remove * added invisible rules, restore visibility of rules marked for removal). * * 3. Finish: Make the changes visible for lookups. Insert replacement rules to * the ofproto provider. Remove replaced and deleted rules from ofproto data * structures, and Schedule postponed removal of deleted rules from the * classifier. Send notifications, buffered packets, etc. */ static enum ofperr do_bundle_commit(struct ofconn *ofconn, uint32_t id, uint16_t flags) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); ovs_version_t version = ofproto->tables_version + 1; struct ofp_bundle *bundle; struct ofp_bundle_entry *be; enum ofperr error; bundle = ofconn_get_bundle(ofconn, id); if (!bundle) { return OFPERR_OFPBFC_BAD_ID; } if (bundle->flags != flags) { error = OFPERR_OFPBFC_BAD_FLAGS; } else { bool prev_is_port_mod = false; error = 0; ovs_mutex_lock(&ofproto_mutex); /* 1. Begin. */ LIST_FOR_EACH (be, node, &bundle->msg_list) { if (be->type == OFPTYPE_PORT_MOD) { /* Our port mods are not atomic. */ if (flags & OFPBF_ATOMIC) { error = OFPERR_OFPBFC_MSG_FAILED; } else { prev_is_port_mod = true; error = port_mod_start(ofconn, &be->opm.pm, &be->opm.port); } } else { /* Flow & group mods between port mods are applied as a single * version, but the versions are published only after we know * the commit is successful. */ if (prev_is_port_mod) { prev_is_port_mod = false; ++version; } if (be->type == OFPTYPE_FLOW_MOD) { /* Store the version in which the changes should take * effect. */ be->ofm.version = version; /* Publishing of the classifier update for every flow * modification in a bundle separately is expensive in * CPU time and memory. Deferring. */ ofproto_table_classifier_defer(ofproto, &be->ofm); error = ofproto_flow_mod_start(ofproto, &be->ofm); } else if (be->type == OFPTYPE_GROUP_MOD) { /* Store the version in which the changes should take * effect. */ be->ogm.version = version; error = ofproto_group_mod_start(ofproto, &be->ogm); } else if (be->type == OFPTYPE_PACKET_OUT) { be->opo.version = version; /* Need to use current version of flows for packet-out, * so publishing all classifiers now. */ ofproto_publish_classifiers(ofproto); error = ofproto_packet_out_start(ofproto, &be->opo); } else { OVS_NOT_REACHED(); } } if (error) { break; } } /* Publishing all changes made to classifiers. */ ofproto_publish_classifiers(ofproto); if (error) { /* Send error referring to the original message. */ ofconn_send_error(ofconn, be->msg, error); error = OFPERR_OFPBFC_MSG_FAILED; /* 2. Revert. Undo all the changes made above. */ LIST_FOR_EACH_REVERSE_CONTINUE(be, node, &bundle->msg_list) { if (be->type == OFPTYPE_FLOW_MOD) { /* Publishing of the classifier update for every flow * modification in a bundle separately is expensive in * CPU time and memory. Deferring. */ ofproto_table_classifier_defer(ofproto, &be->ofm); ofproto_flow_mod_revert(ofproto, &be->ofm); } else if (be->type == OFPTYPE_GROUP_MOD) { ofproto_group_mod_revert(ofproto, &be->ogm); } else if (be->type == OFPTYPE_PACKET_OUT) { /* Need to use current version of flows for packet-out, * so publishing all classifiers now. */ ofproto_publish_classifiers(ofproto); ofproto_packet_out_revert(ofproto, &be->opo); } /* Nothing needs to be reverted for a port mod. */ } /* Publishing all changes made to classifiers. */ ofproto_publish_classifiers(ofproto); } else { /* 4. Finish. */ LIST_FOR_EACH (be, node, &bundle->msg_list) { if (be->type == OFPTYPE_PORT_MOD) { /* Perform the actual port mod. This is not atomic, i.e., * the effects will be immediately seen by upcall * processing regardless of the lookup version. It should * be noted that port configuration changes can originate * also from OVSDB changes asynchronously to all upcall * processing. */ port_mod_finish(ofconn, &be->opm.pm, be->opm.port); } else { version = (be->type == OFPTYPE_FLOW_MOD) ? be->ofm.version : (be->type == OFPTYPE_GROUP_MOD) ? be->ogm.version : (be->type == OFPTYPE_PACKET_OUT) ? be->opo.version : version; /* Bump the lookup version to the one of the current * message. This makes all the changes in the bundle at * this version visible to lookups at once. */ if (ofproto->tables_version < version) { ofproto->tables_version = version; ofproto->ofproto_class->set_tables_version( ofproto, ofproto->tables_version); } struct openflow_mod_requester req = { ofconn, be->msg }; if (be->type == OFPTYPE_FLOW_MOD) { error = ofproto_flow_mod_finish(ofproto, &be->ofm, &req); } else if (be->type == OFPTYPE_GROUP_MOD) { ofproto_group_mod_finish(ofproto, &be->ogm, &req); } else if (be->type == OFPTYPE_PACKET_OUT) { ofproto_packet_out_prepare(ofproto, &be->opo); } } if (error) { break; } } if (error) { /* Send error referring to the original message. */ ofconn_send_error(ofconn, be->msg, error); error = OFPERR_OFPBFC_MSG_FAILED; /* Revert. Undo all the changes made above. */ LIST_FOR_EACH_REVERSE_CONTINUE (be, node, &bundle->msg_list) { if (be->type == OFPTYPE_FLOW_MOD) { ofproto_flow_mod_revert(ofproto, &be->ofm); } else if (be->type == OFPTYPE_GROUP_MOD) { ofproto_group_mod_revert(ofproto, &be->ogm); } else if (be->type == OFPTYPE_PACKET_OUT) { ofproto_packet_out_revert(ofproto, &be->opo); } /* Nothing needs to be reverted for a port mod. */ } } } ofmonitor_flush(ofproto->connmgr); ovs_mutex_unlock(&ofproto_mutex); } /* Executing remaining datapath actions. */ LIST_FOR_EACH (be, node, &bundle->msg_list) { if (be->type == OFPTYPE_PACKET_OUT) { ofproto_packet_out_finish(ofproto, &be->opo); } } /* The bundle is discarded regardless the outcome. */ ofp_bundle_remove__(ofconn, bundle); return error; } static enum ofperr handle_bundle_control(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofputil_bundle_ctrl_msg bctrl; struct ofputil_bundle_ctrl_msg reply; struct ofpbuf *buf; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } error = ofputil_decode_bundle_ctrl(oh, &bctrl); if (error) { return error; } reply.flags = 0; reply.bundle_id = bctrl.bundle_id; switch (bctrl.type) { case OFPBCT_OPEN_REQUEST: error = ofp_bundle_open(ofconn, bctrl.bundle_id, bctrl.flags, oh); reply.type = OFPBCT_OPEN_REPLY; break; case OFPBCT_CLOSE_REQUEST: error = ofp_bundle_close(ofconn, bctrl.bundle_id, bctrl.flags); reply.type = OFPBCT_CLOSE_REPLY; break; case OFPBCT_COMMIT_REQUEST: error = do_bundle_commit(ofconn, bctrl.bundle_id, bctrl.flags); reply.type = OFPBCT_COMMIT_REPLY; break; case OFPBCT_DISCARD_REQUEST: error = ofp_bundle_discard(ofconn, bctrl.bundle_id); reply.type = OFPBCT_DISCARD_REPLY; break; case OFPBCT_OPEN_REPLY: case OFPBCT_CLOSE_REPLY: case OFPBCT_COMMIT_REPLY: case OFPBCT_DISCARD_REPLY: return OFPERR_OFPBFC_BAD_TYPE; break; } if (!error) { buf = ofputil_encode_bundle_ctrl_reply(oh, &reply); ofconn_send_reply(ofconn, buf); } return error; } static enum ofperr handle_bundle_add(struct ofconn *ofconn, const struct ofp_header *oh) OVS_EXCLUDED(ofproto_mutex) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); enum ofperr error; struct ofputil_bundle_add_msg badd; enum ofptype type; error = reject_secondary_controller(ofconn); if (error) { return error; } error = ofputil_decode_bundle_add(oh, &badd, &type); if (error) { return error; } /* Allocate bundle entry and decode the embedded message. */ struct ofp_bundle_entry *bmsg = xmalloc(sizeof *bmsg); struct ofpbuf ofpacts; uint64_t ofpacts_stub[1024 / 8]; ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub); if (type == OFPTYPE_PORT_MOD) { error = ofputil_decode_port_mod(badd.msg, &bmsg->opm.pm, false); } else if (type == OFPTYPE_FLOW_MOD) { struct ofputil_flow_mod fm; error = ofputil_decode_flow_mod(&fm, badd.msg, ofconn_get_protocol(ofconn), ofproto_get_tun_tab(ofproto), &ofproto->vl_mff_map, &ofpacts, u16_to_ofp(ofproto->max_ports), ofproto->n_tables); if (!error) { error = ofproto_flow_mod_init(ofproto, &bmsg->ofm, &fm, NULL); minimatch_destroy(&fm.match); } } else if (type == OFPTYPE_GROUP_MOD) { error = ofputil_decode_group_mod(badd.msg, &bmsg->ogm.gm); } else if (type == OFPTYPE_PACKET_OUT) { struct ofputil_packet_out po; COVERAGE_INC(ofproto_packet_out); /* Decode message. */ error = ofputil_decode_packet_out(&po, badd.msg, ofproto_get_tun_tab(ofproto), &ofpacts); if (!error) { po.ofpacts = ofpbuf_steal_data(&ofpacts); /* Move to heap. */ error = ofproto_packet_out_init(ofproto, ofconn, &bmsg->opo, &po); } } else { OVS_NOT_REACHED(); } ofpbuf_uninit(&ofpacts); if (error) { free(bmsg); return error; } /* Now that the embedded message has been successfully decoded, finish up * initializing the bundle entry. */ bmsg->type = type; bmsg->msg = xmemdup(oh, ntohs(oh->length)); /* Add bundle entry to bundle. */ error = ofp_bundle_add_message(ofconn, badd.bundle_id, badd.flags, bmsg, oh); if (error) { ofp_bundle_entry_free(bmsg); } return error; } static enum ofperr handle_tlv_table_mod(struct ofconn *ofconn, const struct ofp_header *oh) { struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct tun_table *old_tab, *new_tab; struct ofputil_tlv_table_mod ttm; enum ofperr error; error = reject_secondary_controller(ofconn); if (error) { return error; } error = ofputil_decode_tlv_table_mod(oh, &ttm); if (error) { return error; } old_tab = ovsrcu_get_protected(struct tun_table *, &ofproto->metadata_tab); error = tun_metadata_table_mod(&ttm, old_tab, &new_tab); if (!error) { ovs_mutex_lock(&ofproto->vl_mff_map.mutex); error = mf_vl_mff_map_mod_from_tun_metadata(&ofproto->vl_mff_map, &ttm); ovs_mutex_unlock(&ofproto->vl_mff_map.mutex); if (!error) { ovsrcu_set(&ofproto->metadata_tab, new_tab); tun_metadata_postpone_free(old_tab); } else { tun_metadata_free(new_tab); } } ofputil_uninit_tlv_table(&ttm.mappings); return error; } static enum ofperr handle_tlv_table_request(struct ofconn *ofconn, const struct ofp_header *oh) { const struct ofproto *ofproto = ofconn_get_ofproto(ofconn); struct ofputil_tlv_table_reply ttr; struct ofpbuf *b; tun_metadata_table_request(ofproto_get_tun_tab(ofproto), &ttr); b = ofputil_encode_tlv_table_reply(oh, &ttr); ofputil_uninit_tlv_table(&ttr.mappings); ofconn_send_reply(ofconn, b); return 0; } /* Processes the single-part OpenFlow message 'oh' that was received on * 'ofconn'. Returns an ofperr that, if nonzero, the caller should send back * to the controller. */ static enum ofperr handle_single_part_openflow(struct ofconn *ofconn, const struct ofp_header *oh, enum ofptype type) OVS_EXCLUDED(ofproto_mutex) { switch (type) { /* OpenFlow requests. */ case OFPTYPE_ECHO_REQUEST: return handle_echo_request(ofconn, oh); case OFPTYPE_FEATURES_REQUEST: return handle_features_request(ofconn, oh); case OFPTYPE_GET_CONFIG_REQUEST: return handle_get_config_request(ofconn, oh); case OFPTYPE_SET_CONFIG: return handle_set_config(ofconn, oh); case OFPTYPE_PACKET_OUT: return handle_packet_out(ofconn, oh); case OFPTYPE_PORT_MOD: return handle_port_mod(ofconn, oh); case OFPTYPE_FLOW_MOD: return handle_flow_mod(ofconn, oh); case OFPTYPE_GROUP_MOD: return handle_group_mod(ofconn, oh); case OFPTYPE_TABLE_MOD: return handle_table_mod(ofconn, oh); case OFPTYPE_METER_MOD: return handle_meter_mod(ofconn, oh); case OFPTYPE_BARRIER_REQUEST: return handle_barrier_request(ofconn, oh); case OFPTYPE_ROLE_REQUEST: return handle_role_request(ofconn, oh); /* OpenFlow replies. */ case OFPTYPE_ECHO_REPLY: return 0; /* Nicira extension requests. */ case OFPTYPE_FLOW_MOD_TABLE_ID: return handle_nxt_flow_mod_table_id(ofconn, oh); case OFPTYPE_SET_FLOW_FORMAT: return handle_nxt_set_flow_format(ofconn, oh); case OFPTYPE_SET_PACKET_IN_FORMAT: return handle_nxt_set_packet_in_format(ofconn, oh); case OFPTYPE_SET_CONTROLLER_ID: return handle_nxt_set_controller_id(ofconn, oh); case OFPTYPE_FLOW_AGE: /* Nothing to do. */ return 0; case OFPTYPE_FLOW_MONITOR_CANCEL: return handle_flow_monitor_cancel(ofconn, oh); case OFPTYPE_SET_ASYNC_CONFIG: return handle_nxt_set_async_config(ofconn, oh); case OFPTYPE_GET_ASYNC_REQUEST: return handle_nxt_get_async_request(ofconn, oh); case OFPTYPE_NXT_RESUME: return handle_nxt_resume(ofconn, oh); /* Statistics requests. */ case OFPTYPE_DESC_STATS_REQUEST: return handle_desc_stats_request(ofconn, oh); case OFPTYPE_FLOW_STATS_REQUEST: return handle_flow_stats_request(ofconn, oh); case OFPTYPE_AGGREGATE_STATS_REQUEST: return handle_aggregate_stats_request(ofconn, oh); case OFPTYPE_TABLE_STATS_REQUEST: return handle_table_stats_request(ofconn, oh); case OFPTYPE_TABLE_DESC_REQUEST: return handle_table_desc_request(ofconn, oh); case OFPTYPE_PORT_STATS_REQUEST: return handle_port_stats_request(ofconn, oh); case OFPTYPE_QUEUE_STATS_REQUEST: return handle_queue_stats_request(ofconn, oh); case OFPTYPE_PORT_DESC_STATS_REQUEST: return handle_port_desc_stats_request(ofconn, oh); case OFPTYPE_TABLE_FEATURES_STATS_REQUEST: case OFPTYPE_FLOW_MONITOR_STATS_REQUEST: /* Handled as multipart requests in handle_openflow(). */ OVS_NOT_REACHED(); case OFPTYPE_METER_STATS_REQUEST: case OFPTYPE_METER_CONFIG_STATS_REQUEST: return handle_meter_request(ofconn, oh, type); case OFPTYPE_METER_FEATURES_STATS_REQUEST: return handle_meter_features_request(ofconn, oh); case OFPTYPE_GROUP_STATS_REQUEST: return handle_group_stats_request(ofconn, oh); case OFPTYPE_GROUP_DESC_STATS_REQUEST: return handle_group_desc_stats_request(ofconn, oh); case OFPTYPE_GROUP_FEATURES_STATS_REQUEST: return handle_group_features_stats_request(ofconn, oh); case OFPTYPE_QUEUE_GET_CONFIG_REQUEST: return handle_queue_get_config_request(ofconn, oh); case OFPTYPE_BUNDLE_CONTROL: return handle_bundle_control(ofconn, oh); case OFPTYPE_BUNDLE_ADD_MESSAGE: return handle_bundle_add(ofconn, oh); case OFPTYPE_NXT_TLV_TABLE_MOD: return handle_tlv_table_mod(ofconn, oh); case OFPTYPE_NXT_TLV_TABLE_REQUEST: return handle_tlv_table_request(ofconn, oh); case OFPTYPE_IPFIX_BRIDGE_STATS_REQUEST: return handle_ipfix_bridge_stats_request(ofconn, oh); case OFPTYPE_IPFIX_FLOW_STATS_REQUEST: return handle_ipfix_flow_stats_request(ofconn, oh); case OFPTYPE_CT_FLUSH_ZONE: return handle_nxt_ct_flush_zone(ofconn, oh); case OFPTYPE_CT_FLUSH: return handle_nxt_ct_flush(ofconn, oh); case OFPTYPE_HELLO: case OFPTYPE_ERROR: case OFPTYPE_FEATURES_REPLY: case OFPTYPE_GET_CONFIG_REPLY: case OFPTYPE_PACKET_IN: case OFPTYPE_FLOW_REMOVED: case OFPTYPE_PORT_STATUS: case OFPTYPE_BARRIER_REPLY: case OFPTYPE_QUEUE_GET_CONFIG_REPLY: case OFPTYPE_DESC_STATS_REPLY: case OFPTYPE_FLOW_STATS_REPLY: case OFPTYPE_QUEUE_STATS_REPLY: case OFPTYPE_PORT_STATS_REPLY: case OFPTYPE_TABLE_STATS_REPLY: case OFPTYPE_AGGREGATE_STATS_REPLY: case OFPTYPE_PORT_DESC_STATS_REPLY: case OFPTYPE_ROLE_REPLY: case OFPTYPE_FLOW_MONITOR_PAUSED: case OFPTYPE_FLOW_MONITOR_RESUMED: case OFPTYPE_FLOW_MONITOR_STATS_REPLY: case OFPTYPE_GET_ASYNC_REPLY: case OFPTYPE_GROUP_STATS_REPLY: case OFPTYPE_GROUP_DESC_STATS_REPLY: case OFPTYPE_GROUP_FEATURES_STATS_REPLY: case OFPTYPE_METER_STATS_REPLY: case OFPTYPE_METER_CONFIG_STATS_REPLY: case OFPTYPE_METER_FEATURES_STATS_REPLY: case OFPTYPE_TABLE_FEATURES_STATS_REPLY: case OFPTYPE_TABLE_DESC_REPLY: case OFPTYPE_ROLE_STATUS: case OFPTYPE_REQUESTFORWARD: case OFPTYPE_TABLE_STATUS: case OFPTYPE_NXT_TLV_TABLE_REPLY: case OFPTYPE_IPFIX_BRIDGE_STATS_REPLY: case OFPTYPE_IPFIX_FLOW_STATS_REPLY: default: if (ofpmsg_is_stat_request(oh)) { return OFPERR_OFPBRC_BAD_STAT; } else { return OFPERR_OFPBRC_BAD_TYPE; } } } static void handle_openflow(struct ofconn *ofconn, const struct ovs_list *msgs) OVS_EXCLUDED(ofproto_mutex) { COVERAGE_INC(ofproto_recv_openflow); struct ofpbuf *msg = ofpbuf_from_list(ovs_list_front(msgs)); enum ofptype type; enum ofperr error = ofptype_decode(&type, msg->data); if (!error) { if (type == OFPTYPE_TABLE_FEATURES_STATS_REQUEST) { handle_table_features_request(ofconn, msgs); } else if (type == OFPTYPE_FLOW_MONITOR_STATS_REQUEST) { handle_flow_monitor_request(ofconn, msgs); } else if (!ovs_list_is_short(msgs)) { error = OFPERR_OFPBRC_BAD_STAT; } else { error = handle_single_part_openflow(ofconn, msg->data, type); } } if (error) { ofconn_send_error(ofconn, msg->data, error); } } static uint64_t pick_datapath_id(const struct ofproto *ofproto) { const struct ofport *port; port = ofproto_get_port(ofproto, OFPP_LOCAL); if (port) { struct eth_addr ea; int error; error = netdev_get_etheraddr(port->netdev, &ea); if (!error) { return eth_addr_to_uint64(ea); } VLOG_WARN("%s: could not get MAC address for %s (%s)", ofproto->name, netdev_get_name(port->netdev), ovs_strerror(error)); } return ofproto->fallback_dpid; } static uint64_t pick_fallback_dpid(void) { struct eth_addr ea; eth_addr_nicira_random(&ea); return eth_addr_to_uint64(ea); } /* Table overflow policy. */ /* Chooses and updates 'rulep' with a rule to evict from 'table'. Sets 'rulep' * to NULL if the table is not configured to evict rules or if the table * contains no evictable rules. (Rules with a readlock on their evict rwlock, * or with no timeouts are not evictable.) */ static bool choose_rule_to_evict(struct oftable *table, struct rule **rulep) OVS_REQUIRES(ofproto_mutex) { struct eviction_group *evg; *rulep = NULL; if (!table->eviction) { return false; } /* In the common case, the outer and inner loops here will each be entered * exactly once: * * - The inner loop normally "return"s in its first iteration. If the * eviction group has any evictable rules, then it always returns in * some iteration. * * - The outer loop only iterates more than once if the largest eviction * group has no evictable rules. * * - The outer loop can exit only if table's 'max_flows' is all filled up * by unevictable rules. */ HEAP_FOR_EACH (evg, size_node, &table->eviction_groups_by_size) { struct rule *rule; HEAP_FOR_EACH (rule, evg_node, &evg->rules) { *rulep = rule; return true; } } return false; } /* Eviction groups. */ /* Returns the priority to use for an eviction_group that contains 'n_rules' * rules. The priority contains low-order random bits to ensure that eviction * groups with the same number of rules are prioritized randomly. */ static uint32_t eviction_group_priority(size_t n_rules) { uint16_t size = MIN(UINT16_MAX, n_rules); return (size << 16) | random_uint16(); } /* Updates 'evg', an eviction_group within 'table', following a change that * adds or removes rules in 'evg'. */ static void eviction_group_resized(struct oftable *table, struct eviction_group *evg) OVS_REQUIRES(ofproto_mutex) { heap_change(&table->eviction_groups_by_size, &evg->size_node, eviction_group_priority(heap_count(&evg->rules))); } /* Destroys 'evg', an eviction_group within 'table': * * - Removes all the rules, if any, from 'evg'. (It doesn't destroy the * rules themselves, just removes them from the eviction group.) * * - Removes 'evg' from 'table'. * * - Frees 'evg'. */ static void eviction_group_destroy(struct oftable *table, struct eviction_group *evg) OVS_REQUIRES(ofproto_mutex) { while (!heap_is_empty(&evg->rules)) { struct rule *rule; rule = CONTAINER_OF(heap_pop(&evg->rules), struct rule, evg_node); rule->eviction_group = NULL; } hmap_remove(&table->eviction_groups_by_id, &evg->id_node); heap_remove(&table->eviction_groups_by_size, &evg->size_node); heap_destroy(&evg->rules); free(evg); } /* Removes 'rule' from its eviction group, if any. */ static void eviction_group_remove_rule(struct rule *rule) OVS_REQUIRES(ofproto_mutex) { if (rule->eviction_group) { struct oftable *table = &rule->ofproto->tables[rule->table_id]; struct eviction_group *evg = rule->eviction_group; rule->eviction_group = NULL; heap_remove(&evg->rules, &rule->evg_node); if (heap_is_empty(&evg->rules)) { eviction_group_destroy(table, evg); } else { eviction_group_resized(table, evg); } } } /* Hashes the 'rule''s values for the eviction_fields of 'rule''s table, and * returns the hash value. */ static uint32_t eviction_group_hash_rule(struct rule *rule) OVS_REQUIRES(ofproto_mutex) { struct oftable *table = &rule->ofproto->tables[rule->table_id]; const struct mf_subfield *sf; struct flow flow; uint32_t hash; hash = table->eviction_group_id_basis; miniflow_expand(rule->cr.match.flow, &flow); for (sf = table->eviction_fields; sf && sf < &table->eviction_fields[table->n_eviction_fields]; sf++) { if (mf_are_prereqs_ok(sf->field, &flow, NULL)) { union mf_value value; mf_get_value(sf->field, &flow, &value); if (sf->ofs) { bitwise_zero(&value, sf->field->n_bytes, 0, sf->ofs); } if (sf->ofs + sf->n_bits < sf->field->n_bytes * 8) { unsigned int start = sf->ofs + sf->n_bits; bitwise_zero(&value, sf->field->n_bytes, start, sf->field->n_bytes * 8 - start); } hash = hash_bytes(&value, sf->field->n_bytes, hash); } else { hash = hash_int(hash, 0); } } return hash; } /* Returns an eviction group within 'table' with the given 'id', creating one * if necessary. */ static struct eviction_group * eviction_group_find(struct oftable *table, uint32_t id) OVS_REQUIRES(ofproto_mutex) { struct eviction_group *evg; HMAP_FOR_EACH_WITH_HASH (evg, id_node, id, &table->eviction_groups_by_id) { return evg; } evg = xmalloc(sizeof *evg); hmap_insert(&table->eviction_groups_by_id, &evg->id_node, id); heap_insert(&table->eviction_groups_by_size, &evg->size_node, eviction_group_priority(0)); heap_init(&evg->rules); return evg; } /* Returns an eviction priority for 'rule'. The return value should be * interpreted so that higher priorities make a rule a more attractive * candidate for eviction. */ static uint64_t rule_eviction_priority(struct ofproto *ofproto, struct rule *rule) OVS_REQUIRES(ofproto_mutex) { /* Calculate absolute time when this flow will expire. If it will never * expire, then return 0 to make it unevictable. */ long long int expiration = LLONG_MAX; if (rule->hard_timeout) { /* 'modified' needs protection even when we hold 'ofproto_mutex'. */ ovs_mutex_lock(&rule->mutex); long long int modified = rule->modified; ovs_mutex_unlock(&rule->mutex); expiration = modified + rule->hard_timeout * 1000; } if (rule->idle_timeout) { struct pkt_stats stats; long long int used; long long int idle_expiration; ofproto->ofproto_class->rule_get_stats(rule, &stats, &used); idle_expiration = used + rule->idle_timeout * 1000; expiration = MIN(expiration, idle_expiration); } if (expiration == LLONG_MAX) { return 0; } /* Calculate the time of expiration as a number of (approximate) seconds * after program startup. * * This should work OK for program runs that last UINT32_MAX seconds or * less. Therefore, please restart OVS at least once every 136 years. */ uint32_t expiration_ofs = (expiration >> 10) - (time_boot_msec() >> 10); /* Combine expiration time with OpenFlow "importance" to form a single * priority value. We want flows with relatively low "importance" to be * evicted before even considering expiration time, so put "importance" in * the most significant bits and expiration time in the least significant * bits. * * Small 'priority' should be evicted before those with large 'priority'. * The caller expects the opposite convention (a large return value being * more attractive for eviction) so we invert it before returning. */ uint64_t priority = ((uint64_t) rule->importance << 32) + expiration_ofs; return UINT64_MAX - priority; } /* Adds 'rule' to an appropriate eviction group for its oftable's * configuration. Does nothing if 'rule''s oftable doesn't have eviction * enabled, or if 'rule' is a permanent rule (one that will never expire on its * own). * * The caller must ensure that 'rule' is not already in an eviction group. */ static void eviction_group_add_rule(struct rule *rule) OVS_REQUIRES(ofproto_mutex) { struct ofproto *ofproto = rule->ofproto; struct oftable *table = &ofproto->tables[rule->table_id]; bool has_timeout; /* Timeouts may be modified only when holding 'ofproto_mutex'. We have it * so no additional protection is needed. */ has_timeout = rule->hard_timeout || rule->idle_timeout; if (table->eviction && has_timeout) { struct eviction_group *evg; evg = eviction_group_find(table, eviction_group_hash_rule(rule)); rule->eviction_group = evg; heap_insert(&evg->rules, &rule->evg_node, rule_eviction_priority(ofproto, rule)); eviction_group_resized(table, evg); } } /* oftables. */ /* Initializes 'table'. */ static void oftable_init(struct oftable *table) { memset(table, 0, sizeof *table); classifier_init(&table->cls, flow_segment_u64s); table->max_flows = UINT_MAX; table->n_flows = 0; hmap_init(&table->eviction_groups_by_id); heap_init(&table->eviction_groups_by_size); atomic_init(&table->miss_config, OFPUTIL_TABLE_MISS_DEFAULT); classifier_set_prefix_fields(&table->cls, default_prefix_fields, ARRAY_SIZE(default_prefix_fields)); atomic_init(&table->n_matched, 0); atomic_init(&table->n_missed, 0); } /* Destroys 'table', including its classifier and eviction groups. * * The caller is responsible for freeing 'table' itself. */ static void oftable_destroy(struct oftable *table) { ovs_assert(classifier_is_empty(&table->cls)); ovs_mutex_lock(&ofproto_mutex); oftable_configure_eviction(table, 0, NULL, 0); ovs_mutex_unlock(&ofproto_mutex); hmap_destroy(&table->eviction_groups_by_id); heap_destroy(&table->eviction_groups_by_size); classifier_destroy(&table->cls); free(table->name); } /* Changes the name of 'table' to 'name'. Null or empty string 'name' unsets * the name. * * 'level' should be 1 if the name is being set via OpenFlow, or 2 if the name * is being set via OVSDB. Higher levels get precedence. * * This only affects the name exposed for a table exposed through the OpenFlow * OFPST_TABLE (as printed by "ovs-ofctl dump-tables"). */ static void oftable_set_name(struct oftable *table, const char *name, int level) { int len = name ? strnlen(name, OFP_MAX_TABLE_NAME_LEN) : 0; if (level >= table->name_level) { if (name) { if (name[0]) { if (!table->name || strncmp(name, table->name, len)) { free(table->name); table->name = xmemdup0(name, len); } } else { free(table->name); table->name = NULL; } table->name_level = level; } else if (table->name_level == level) { free(table->name); table->name = NULL; table->name_level = 0; } } } /* Returns true if oftable_set_name(table, name, level) would be effective, * false otherwise. */ static bool oftable_may_set_name(const struct oftable *table, const char *name, int level) { return (level >= table->name_level || !name || !table->name || !strncmp(name, table->name, strnlen(name, OFP_MAX_TABLE_NAME_LEN))); } /* oftables support a choice of two policies when adding a rule would cause the * number of flows in the table to exceed the configured maximum number: either * they can refuse to add the new flow or they can evict some existing flow. * This function configures the latter policy on 'table', with fairness based * on the values of the 'n_fields' fields specified in 'fields'. (Specifying * 'n_fields' as 0 disables fairness.) */ static void oftable_configure_eviction(struct oftable *table, unsigned int eviction, const struct mf_subfield *fields, size_t n_fields) OVS_REQUIRES(ofproto_mutex) { struct rule *rule; if ((table->eviction != 0) == (eviction != 0) && n_fields == table->n_eviction_fields && (!n_fields || !memcmp(fields, table->eviction_fields, n_fields * sizeof *fields))) { /* The set of eviction fields did not change. If 'eviction' changed, * it remains nonzero, so that we can just update table->eviction * without fussing with the eviction groups. */ table->eviction = eviction; return; } /* Destroy existing eviction groups, then destroy and recreate data * structures to recover memory. */ struct eviction_group *evg; HMAP_FOR_EACH_SAFE (evg, id_node, &table->eviction_groups_by_id) { eviction_group_destroy(table, evg); } hmap_destroy(&table->eviction_groups_by_id); hmap_init(&table->eviction_groups_by_id); heap_destroy(&table->eviction_groups_by_size); heap_init(&table->eviction_groups_by_size); /* Replace eviction groups by the new ones, if there is a change. Free the * old fields only after allocating the new ones, because 'fields == * table->eviction_fields' is possible. */ struct mf_subfield *old_fields = table->eviction_fields; table->n_eviction_fields = n_fields; table->eviction_fields = (fields ? xmemdup(fields, n_fields * sizeof *fields) : NULL); free(old_fields); /* Add the new eviction groups, if enabled. */ table->eviction = eviction; if (table->eviction) { table->eviction_group_id_basis = random_uint32(); CLS_FOR_EACH (rule, cr, &table->cls) { eviction_group_add_rule(rule); } } } /* Inserts 'rule' from the ofproto data structures BEFORE caller has inserted * it to the classifier. */ static void ofproto_rule_insert__(struct ofproto *ofproto, struct rule *rule) OVS_REQUIRES(ofproto_mutex) { const struct rule_actions *actions = rule_get_actions(rule); /* A rule may not be reinserted. */ ovs_assert(rule->state != RULE_INSERTED); if (rule->hard_timeout || rule->idle_timeout) { ovs_list_insert(&ofproto->expirable, &rule->expirable); } cookies_insert(ofproto, rule); eviction_group_add_rule(rule); if (actions->has_meter) { meter_insert_rule(rule); } if (actions->has_groups) { const struct ofpact_group *a; OFPACT_FOR_EACH_TYPE_FLATTENED (a, GROUP, actions->ofpacts, actions->ofpacts_len) { struct ofgroup *group; group = ofproto_group_lookup(ofproto, a->group_id, OVS_VERSION_MAX, false); ovs_assert(group != NULL); group_add_rule(group, rule); } } rule->state = RULE_INSERTED; } /* Removes 'rule' from the ofproto data structures. Caller may have deferred * the removal from the classifier. */ static void ofproto_rule_remove__(struct ofproto *ofproto, struct rule *rule) OVS_REQUIRES(ofproto_mutex) { ovs_assert(rule->state == RULE_INSERTED); cookies_remove(ofproto, rule); eviction_group_remove_rule(rule); if (!ovs_list_is_empty(&rule->expirable)) { ovs_list_remove(&rule->expirable); } if (!ovs_list_is_empty(&rule->meter_list_node)) { ovs_list_remove(&rule->meter_list_node); ovs_list_init(&rule->meter_list_node); } /* Remove the rule from any groups, except from the group that is being * deleted, if any. */ const struct rule_actions *actions = rule_get_actions(rule); if (actions->has_groups) { const struct ofpact_group *a; OFPACT_FOR_EACH_TYPE_FLATTENED(a, GROUP, actions->ofpacts, actions->ofpacts_len) { struct ofgroup *group; group = ofproto_group_lookup(ofproto, a->group_id, OVS_VERSION_MAX, false); ovs_assert(group); /* Leave the rule for the group that is being deleted, if any, * as we still need the list of rules for clean-up. */ if (!group->being_deleted) { group_remove_rule(group, rule); } } } rule->state = RULE_REMOVED; } /* unixctl commands. */ struct ofproto * ofproto_lookup(const char *name) { struct ofproto *ofproto; HMAP_FOR_EACH_WITH_HASH (ofproto, hmap_node, hash_string(name, 0), &all_ofprotos) { if (!strcmp(ofproto->name, name)) { return ofproto; } } return NULL; } static void ofproto_unixctl_list(struct unixctl_conn *conn, int argc OVS_UNUSED, const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED) { struct ofproto *ofproto; struct ds results; ds_init(&results); HMAP_FOR_EACH (ofproto, hmap_node, &all_ofprotos) { ds_put_format(&results, "%s\n", ofproto->name); } unixctl_command_reply(conn, ds_cstr(&results)); ds_destroy(&results); } static void ofproto_unixctl_init(void) { static bool registered; if (registered) { return; } registered = true; unixctl_command_register("ofproto/list", "", 0, 0, ofproto_unixctl_list, NULL); } void ofproto_set_vlan_limit(int vlan_limit) { flow_limit_vlans(vlan_limit); }