/* * 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 "bitmap.h" #include "command-line.h" #include "daemon.h" #include "dirs.h" #include "openvswitch/dynamic-string.h" #include "fatal-signal.h" #include "hash.h" #include "openvswitch/hmap.h" #include "openvswitch/json.h" #include "ovn/lex.h" #include "ovn/lib/chassis-index.h" #include "ovn/lib/logical-fields.h" #include "ovn/lib/ovn-l7.h" #include "ovn/lib/ovn-nb-idl.h" #include "ovn/lib/ovn-sb-idl.h" #include "ovn/lib/ovn-util.h" #include "ovn/actions.h" #include "packets.h" #include "openvswitch/poll-loop.h" #include "smap.h" #include "sset.h" #include "stream.h" #include "stream-ssl.h" #include "unixctl.h" #include "util.h" #include "uuid.h" #include "openvswitch/vlog.h" VLOG_DEFINE_THIS_MODULE(ovn_northd); static unixctl_cb_func ovn_northd_exit; struct northd_context { struct ovsdb_idl *ovnnb_idl; struct ovsdb_idl *ovnsb_idl; struct ovsdb_idl_txn *ovnnb_txn; struct ovsdb_idl_txn *ovnsb_txn; }; static const char *ovnnb_db; static const char *ovnsb_db; #define MAC_ADDR_PREFIX 0x0A0000000000ULL #define MAC_ADDR_SPACE 0xffffff /* MAC address management (macam) table of "struct eth_addr"s, that holds the * MAC addresses allocated by the OVN ipam module. */ static struct hmap macam = HMAP_INITIALIZER(&macam); #define MAX_OVN_TAGS 4096 /* Pipeline stages. */ /* The two pipelines in an OVN logical flow table. */ enum ovn_pipeline { P_IN, /* Ingress pipeline. */ P_OUT /* Egress pipeline. */ }; /* The two purposes for which ovn-northd uses OVN logical datapaths. */ enum ovn_datapath_type { DP_SWITCH, /* OVN logical switch. */ DP_ROUTER /* OVN logical router. */ }; /* Returns an "enum ovn_stage" built from the arguments. * * (It's better to use ovn_stage_build() for type-safety reasons, but inline * functions can't be used in enums or switch cases.) */ #define OVN_STAGE_BUILD(DP_TYPE, PIPELINE, TABLE) \ (((DP_TYPE) << 9) | ((PIPELINE) << 8) | (TABLE)) /* A stage within an OVN logical switch or router. * * An "enum ovn_stage" indicates whether the stage is part of a logical switch * or router, whether the stage is part of the ingress or egress pipeline, and * the table within that pipeline. The first three components are combined to * form the stage's full name, e.g. S_SWITCH_IN_PORT_SEC_L2, * S_ROUTER_OUT_DELIVERY. */ enum ovn_stage { #define PIPELINE_STAGES \ /* Logical switch ingress stages. */ \ PIPELINE_STAGE(SWITCH, IN, PORT_SEC_L2, 0, "ls_in_port_sec_l2") \ PIPELINE_STAGE(SWITCH, IN, PORT_SEC_IP, 1, "ls_in_port_sec_ip") \ PIPELINE_STAGE(SWITCH, IN, PORT_SEC_ND, 2, "ls_in_port_sec_nd") \ PIPELINE_STAGE(SWITCH, IN, PRE_ACL, 3, "ls_in_pre_acl") \ PIPELINE_STAGE(SWITCH, IN, PRE_LB, 4, "ls_in_pre_lb") \ PIPELINE_STAGE(SWITCH, IN, PRE_STATEFUL, 5, "ls_in_pre_stateful") \ PIPELINE_STAGE(SWITCH, IN, ACL, 6, "ls_in_acl") \ PIPELINE_STAGE(SWITCH, IN, QOS_MARK, 7, "ls_in_qos_mark") \ PIPELINE_STAGE(SWITCH, IN, LB, 8, "ls_in_lb") \ PIPELINE_STAGE(SWITCH, IN, STATEFUL, 9, "ls_in_stateful") \ PIPELINE_STAGE(SWITCH, IN, ARP_ND_RSP, 10, "ls_in_arp_rsp") \ PIPELINE_STAGE(SWITCH, IN, DHCP_OPTIONS, 11, "ls_in_dhcp_options") \ PIPELINE_STAGE(SWITCH, IN, DHCP_RESPONSE, 12, "ls_in_dhcp_response") \ PIPELINE_STAGE(SWITCH, IN, DNS_LOOKUP, 13, "ls_in_dns_lookup") \ PIPELINE_STAGE(SWITCH, IN, DNS_RESPONSE, 14, "ls_in_dns_response") \ PIPELINE_STAGE(SWITCH, IN, L2_LKUP, 15, "ls_in_l2_lkup") \ \ /* Logical switch egress stages. */ \ PIPELINE_STAGE(SWITCH, OUT, PRE_LB, 0, "ls_out_pre_lb") \ PIPELINE_STAGE(SWITCH, OUT, PRE_ACL, 1, "ls_out_pre_acl") \ PIPELINE_STAGE(SWITCH, OUT, PRE_STATEFUL, 2, "ls_out_pre_stateful") \ PIPELINE_STAGE(SWITCH, OUT, LB, 3, "ls_out_lb") \ PIPELINE_STAGE(SWITCH, OUT, ACL, 4, "ls_out_acl") \ PIPELINE_STAGE(SWITCH, OUT, QOS_MARK, 5, "ls_out_qos_mark") \ PIPELINE_STAGE(SWITCH, OUT, STATEFUL, 6, "ls_out_stateful") \ PIPELINE_STAGE(SWITCH, OUT, PORT_SEC_IP, 7, "ls_out_port_sec_ip") \ PIPELINE_STAGE(SWITCH, OUT, PORT_SEC_L2, 8, "ls_out_port_sec_l2") \ \ /* Logical router ingress stages. */ \ PIPELINE_STAGE(ROUTER, IN, ADMISSION, 0, "lr_in_admission") \ PIPELINE_STAGE(ROUTER, IN, IP_INPUT, 1, "lr_in_ip_input") \ PIPELINE_STAGE(ROUTER, IN, DEFRAG, 2, "lr_in_defrag") \ PIPELINE_STAGE(ROUTER, IN, UNSNAT, 3, "lr_in_unsnat") \ PIPELINE_STAGE(ROUTER, IN, DNAT, 4, "lr_in_dnat") \ PIPELINE_STAGE(ROUTER, IN, ND_RA_OPTIONS, 5, "lr_in_nd_ra_options") \ PIPELINE_STAGE(ROUTER, IN, ND_RA_RESPONSE, 6, "lr_in_nd_ra_response") \ PIPELINE_STAGE(ROUTER, IN, IP_ROUTING, 7, "lr_in_ip_routing") \ PIPELINE_STAGE(ROUTER, IN, ARP_RESOLVE, 8, "lr_in_arp_resolve") \ PIPELINE_STAGE(ROUTER, IN, GW_REDIRECT, 9, "lr_in_gw_redirect") \ PIPELINE_STAGE(ROUTER, IN, ARP_REQUEST, 10, "lr_in_arp_request") \ \ /* Logical router egress stages. */ \ PIPELINE_STAGE(ROUTER, OUT, UNDNAT, 0, "lr_out_undnat") \ PIPELINE_STAGE(ROUTER, OUT, SNAT, 1, "lr_out_snat") \ PIPELINE_STAGE(ROUTER, OUT, EGR_LOOP, 2, "lr_out_egr_loop") \ PIPELINE_STAGE(ROUTER, OUT, DELIVERY, 3, "lr_out_delivery") #define PIPELINE_STAGE(DP_TYPE, PIPELINE, STAGE, TABLE, NAME) \ S_##DP_TYPE##_##PIPELINE##_##STAGE \ = OVN_STAGE_BUILD(DP_##DP_TYPE, P_##PIPELINE, TABLE), PIPELINE_STAGES #undef PIPELINE_STAGE }; /* Due to various hard-coded priorities need to implement ACLs, the * northbound database supports a smaller range of ACL priorities than * are available to logical flows. This value is added to an ACL * priority to determine the ACL's logical flow priority. */ #define OVN_ACL_PRI_OFFSET 1000 /* Register definitions specific to switches. */ #define REGBIT_CONNTRACK_DEFRAG "reg0[0]" #define REGBIT_CONNTRACK_COMMIT "reg0[1]" #define REGBIT_CONNTRACK_NAT "reg0[2]" #define REGBIT_DHCP_OPTS_RESULT "reg0[3]" #define REGBIT_DNS_LOOKUP_RESULT "reg0[4]" #define REGBIT_ND_RA_OPTS_RESULT "reg0[5]" /* Register definitions for switches and routers. */ #define REGBIT_NAT_REDIRECT "reg9[0]" /* Indicate that this packet has been recirculated using egress * loopback. This allows certain checks to be bypassed, such as a * logical router dropping packets with source IP address equals * one of the logical router's own IP addresses. */ #define REGBIT_EGRESS_LOOPBACK "reg9[1]" /* Returns an "enum ovn_stage" built from the arguments. */ static enum ovn_stage ovn_stage_build(enum ovn_datapath_type dp_type, enum ovn_pipeline pipeline, uint8_t table) { return OVN_STAGE_BUILD(dp_type, pipeline, table); } /* Returns the pipeline to which 'stage' belongs. */ static enum ovn_pipeline ovn_stage_get_pipeline(enum ovn_stage stage) { return (stage >> 8) & 1; } /* Returns the table to which 'stage' belongs. */ static uint8_t ovn_stage_get_table(enum ovn_stage stage) { return stage & 0xff; } /* Returns a string name for 'stage'. */ static const char * ovn_stage_to_str(enum ovn_stage stage) { switch (stage) { #define PIPELINE_STAGE(DP_TYPE, PIPELINE, STAGE, TABLE, NAME) \ case S_##DP_TYPE##_##PIPELINE##_##STAGE: return NAME; PIPELINE_STAGES #undef PIPELINE_STAGE default: return ""; } } /* Returns the type of the datapath to which a flow with the given 'stage' may * be added. */ static enum ovn_datapath_type ovn_stage_to_datapath_type(enum ovn_stage stage) { switch (stage) { #define PIPELINE_STAGE(DP_TYPE, PIPELINE, STAGE, TABLE, NAME) \ case S_##DP_TYPE##_##PIPELINE##_##STAGE: return DP_##DP_TYPE; PIPELINE_STAGES #undef PIPELINE_STAGE default: OVS_NOT_REACHED(); } } static void usage(void) { printf("\ %s: OVN northbound management daemon\n\ usage: %s [OPTIONS]\n\ \n\ Options:\n\ --ovnnb-db=DATABASE connect to ovn-nb database at DATABASE\n\ (default: %s)\n\ --ovnsb-db=DATABASE connect to ovn-sb database at DATABASE\n\ (default: %s)\n\ -h, --help display this help message\n\ -o, --options list available options\n\ -V, --version display version information\n\ ", program_name, program_name, default_nb_db(), default_sb_db()); daemon_usage(); vlog_usage(); stream_usage("database", true, true, false); } struct tnlid_node { struct hmap_node hmap_node; uint32_t tnlid; }; static void destroy_tnlids(struct hmap *tnlids) { struct tnlid_node *node; HMAP_FOR_EACH_POP (node, hmap_node, tnlids) { free(node); } hmap_destroy(tnlids); } static void add_tnlid(struct hmap *set, uint32_t tnlid) { struct tnlid_node *node = xmalloc(sizeof *node); hmap_insert(set, &node->hmap_node, hash_int(tnlid, 0)); node->tnlid = tnlid; } static bool tnlid_in_use(const struct hmap *set, uint32_t tnlid) { const struct tnlid_node *node; HMAP_FOR_EACH_IN_BUCKET (node, hmap_node, hash_int(tnlid, 0), set) { if (node->tnlid == tnlid) { return true; } } return false; } static uint32_t allocate_tnlid(struct hmap *set, const char *name, uint32_t max, uint32_t *hint) { for (uint32_t tnlid = *hint + 1; tnlid != *hint; tnlid = tnlid + 1 <= max ? tnlid + 1 : 1) { if (!tnlid_in_use(set, tnlid)) { add_tnlid(set, tnlid); *hint = tnlid; return tnlid; } } static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "all %s tunnel ids exhausted", name); return 0; } struct ovn_chassis_qdisc_queues { struct hmap_node key_node; uint32_t queue_id; struct uuid chassis_uuid; }; static void destroy_chassis_queues(struct hmap *set) { struct ovn_chassis_qdisc_queues *node; HMAP_FOR_EACH_POP (node, key_node, set) { free(node); } hmap_destroy(set); } static void add_chassis_queue(struct hmap *set, struct uuid *chassis_uuid, uint32_t queue_id) { struct ovn_chassis_qdisc_queues *node = xmalloc(sizeof *node); node->queue_id = queue_id; memcpy(&node->chassis_uuid, chassis_uuid, sizeof node->chassis_uuid); hmap_insert(set, &node->key_node, uuid_hash(chassis_uuid)); } static bool chassis_queueid_in_use(const struct hmap *set, struct uuid *chassis_uuid, uint32_t queue_id) { const struct ovn_chassis_qdisc_queues *node; HMAP_FOR_EACH_WITH_HASH (node, key_node, uuid_hash(chassis_uuid), set) { if (uuid_equals(chassis_uuid, &node->chassis_uuid) && node->queue_id == queue_id) { return true; } } return false; } static uint32_t allocate_chassis_queueid(struct hmap *set, struct sbrec_chassis *chassis) { for (uint32_t queue_id = QDISC_MIN_QUEUE_ID + 1; queue_id <= QDISC_MAX_QUEUE_ID; queue_id++) { if (!chassis_queueid_in_use(set, &chassis->header_.uuid, queue_id)) { add_chassis_queue(set, &chassis->header_.uuid, queue_id); return queue_id; } } static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "all %s queue ids exhausted", chassis->name); return 0; } static void free_chassis_queueid(struct hmap *set, struct sbrec_chassis *chassis, uint32_t queue_id) { struct ovn_chassis_qdisc_queues *node; HMAP_FOR_EACH_WITH_HASH (node, key_node, uuid_hash(&chassis->header_.uuid), set) { if (uuid_equals(&chassis->header_.uuid, &node->chassis_uuid) && node->queue_id == queue_id) { hmap_remove(set, &node->key_node); break; } } } static inline bool port_has_qos_params(const struct smap *opts) { return (smap_get(opts, "qos_max_rate") || smap_get(opts, "qos_burst")); } struct ipam_info { uint32_t start_ipv4; size_t total_ipv4s; unsigned long *allocated_ipv4s; /* A bitmap of allocated IPv4s */ bool ipv6_prefix_set; struct in6_addr ipv6_prefix; }; /* The 'key' comes from nbs->header_.uuid or nbr->header_.uuid or * sb->external_ids:logical-switch. */ struct ovn_datapath { struct hmap_node key_node; /* Index on 'key'. */ struct uuid key; /* (nbs/nbr)->header_.uuid. */ const struct nbrec_logical_switch *nbs; /* May be NULL. */ const struct nbrec_logical_router *nbr; /* May be NULL. */ const struct sbrec_datapath_binding *sb; /* May be NULL. */ struct ovs_list list; /* In list of similar records. */ /* Logical switch data. */ struct ovn_port **router_ports; size_t n_router_ports; struct hmap port_tnlids; uint32_t port_key_hint; bool has_unknown; /* IPAM data. */ struct ipam_info *ipam_info; /* OVN northd only needs to know about the logical router gateway port for * NAT on a distributed router. This "distributed gateway port" is * populated only when there is a "redirect-chassis" specified for one of * the ports on the logical router. Otherwise this will be NULL. */ struct ovn_port *l3dgw_port; /* The "derived" OVN port representing the instance of l3dgw_port on * the "redirect-chassis". */ struct ovn_port *l3redirect_port; struct ovn_port *localnet_port; }; struct macam_node { struct hmap_node hmap_node; struct eth_addr mac_addr; /* Allocated MAC address. */ }; static void cleanup_macam(struct hmap *macam) { struct macam_node *node; HMAP_FOR_EACH_POP (node, hmap_node, macam) { free(node); } } static struct ovn_datapath * ovn_datapath_create(struct hmap *datapaths, const struct uuid *key, const struct nbrec_logical_switch *nbs, const struct nbrec_logical_router *nbr, const struct sbrec_datapath_binding *sb) { struct ovn_datapath *od = xzalloc(sizeof *od); od->key = *key; od->sb = sb; od->nbs = nbs; od->nbr = nbr; hmap_init(&od->port_tnlids); od->port_key_hint = 0; hmap_insert(datapaths, &od->key_node, uuid_hash(&od->key)); return od; } static void ovn_datapath_destroy(struct hmap *datapaths, struct ovn_datapath *od) { if (od) { /* Don't remove od->list. It is used within build_datapaths() as a * private list and once we've exited that function it is not safe to * use it. */ hmap_remove(datapaths, &od->key_node); destroy_tnlids(&od->port_tnlids); if (od->ipam_info) { bitmap_free(od->ipam_info->allocated_ipv4s); free(od->ipam_info); } free(od->router_ports); free(od); } } /* Returns 'od''s datapath type. */ static enum ovn_datapath_type ovn_datapath_get_type(const struct ovn_datapath *od) { return od->nbs ? DP_SWITCH : DP_ROUTER; } static struct ovn_datapath * ovn_datapath_find(struct hmap *datapaths, const struct uuid *uuid) { struct ovn_datapath *od; HMAP_FOR_EACH_WITH_HASH (od, key_node, uuid_hash(uuid), datapaths) { if (uuid_equals(uuid, &od->key)) { return od; } } return NULL; } static struct ovn_datapath * ovn_datapath_from_sbrec(struct hmap *datapaths, const struct sbrec_datapath_binding *sb) { struct uuid key; if (!smap_get_uuid(&sb->external_ids, "logical-switch", &key) && !smap_get_uuid(&sb->external_ids, "logical-router", &key)) { return NULL; } return ovn_datapath_find(datapaths, &key); } static bool lrouter_is_enabled(const struct nbrec_logical_router *lrouter) { return !lrouter->enabled || *lrouter->enabled; } static void init_ipam_info_for_datapath(struct ovn_datapath *od) { if (!od->nbs) { return; } const char *subnet_str = smap_get(&od->nbs->other_config, "subnet"); const char *ipv6_prefix = smap_get(&od->nbs->other_config, "ipv6_prefix"); if (ipv6_prefix) { od->ipam_info = xzalloc(sizeof *od->ipam_info); od->ipam_info->ipv6_prefix_set = ipv6_parse( ipv6_prefix, &od->ipam_info->ipv6_prefix); } if (!subnet_str) { return; } ovs_be32 subnet, mask; char *error = ip_parse_masked(subnet_str, &subnet, &mask); if (error || mask == OVS_BE32_MAX || !ip_is_cidr(mask)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad 'subnet' %s", subnet_str); free(error); return; } if (!od->ipam_info) { od->ipam_info = xzalloc(sizeof *od->ipam_info); } od->ipam_info->start_ipv4 = ntohl(subnet) + 1; od->ipam_info->total_ipv4s = ~ntohl(mask); od->ipam_info->allocated_ipv4s = bitmap_allocate(od->ipam_info->total_ipv4s); /* Mark first IP as taken */ bitmap_set1(od->ipam_info->allocated_ipv4s, 0); /* Check if there are any reserver IPs (list) to be excluded from IPAM */ const char *exclude_ip_list = smap_get(&od->nbs->other_config, "exclude_ips"); if (!exclude_ip_list) { return; } struct lexer lexer; lexer_init(&lexer, exclude_ip_list); /* exclude_ip_list could be in the format - * "10.0.0.4 10.0.0.10 10.0.0.20..10.0.0.50 10.0.0.100..10.0.0.110". */ lexer_get(&lexer); while (lexer.token.type != LEX_T_END) { if (lexer.token.type != LEX_T_INTEGER) { lexer_syntax_error(&lexer, "expecting address"); break; } uint32_t start = ntohl(lexer.token.value.ipv4); lexer_get(&lexer); uint32_t end = start + 1; if (lexer_match(&lexer, LEX_T_ELLIPSIS)) { if (lexer.token.type != LEX_T_INTEGER) { lexer_syntax_error(&lexer, "expecting address range"); break; } end = ntohl(lexer.token.value.ipv4) + 1; lexer_get(&lexer); } /* Clamp start...end to fit the subnet. */ start = MAX(od->ipam_info->start_ipv4, start); end = MIN(od->ipam_info->start_ipv4 + od->ipam_info->total_ipv4s, end); if (end > start) { bitmap_set_multiple(od->ipam_info->allocated_ipv4s, start - od->ipam_info->start_ipv4, end - start, 1); } else { lexer_error(&lexer, "excluded addresses not in subnet"); } } if (lexer.error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "logical switch "UUID_FMT": bad exclude_ips (%s)", UUID_ARGS(&od->key), lexer.error); } lexer_destroy(&lexer); } static void ovn_datapath_update_external_ids(struct ovn_datapath *od) { /* Get the logical-switch or logical-router UUID to set in * external-ids. */ char uuid_s[UUID_LEN + 1]; sprintf(uuid_s, UUID_FMT, UUID_ARGS(&od->key)); const char *key = od->nbs ? "logical-switch" : "logical-router"; /* Get names to set in external-ids. */ const char *name = od->nbs ? od->nbs->name : od->nbr->name; const char *name2 = (od->nbs ? smap_get(&od->nbs->external_ids, "neutron:network_name") : smap_get(&od->nbr->external_ids, "neutron:router_name")); /* Set external-ids. */ struct smap ids = SMAP_INITIALIZER(&ids); smap_add(&ids, key, uuid_s); smap_add(&ids, "name", name); if (name2 && name2[0]) { smap_add(&ids, "name2", name2); } sbrec_datapath_binding_set_external_ids(od->sb, &ids); smap_destroy(&ids); } static void join_datapaths(struct northd_context *ctx, struct hmap *datapaths, struct ovs_list *sb_only, struct ovs_list *nb_only, struct ovs_list *both) { hmap_init(datapaths); ovs_list_init(sb_only); ovs_list_init(nb_only); ovs_list_init(both); const struct sbrec_datapath_binding *sb, *sb_next; SBREC_DATAPATH_BINDING_FOR_EACH_SAFE (sb, sb_next, ctx->ovnsb_idl) { struct uuid key; if (!smap_get_uuid(&sb->external_ids, "logical-switch", &key) && !smap_get_uuid(&sb->external_ids, "logical-router", &key)) { ovsdb_idl_txn_add_comment( ctx->ovnsb_txn, "deleting Datapath_Binding "UUID_FMT" that lacks " "external-ids:logical-switch and " "external-ids:logical-router", UUID_ARGS(&sb->header_.uuid)); sbrec_datapath_binding_delete(sb); continue; } if (ovn_datapath_find(datapaths, &key)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_INFO_RL( &rl, "deleting Datapath_Binding "UUID_FMT" with " "duplicate external-ids:logical-switch/router "UUID_FMT, UUID_ARGS(&sb->header_.uuid), UUID_ARGS(&key)); sbrec_datapath_binding_delete(sb); continue; } struct ovn_datapath *od = ovn_datapath_create(datapaths, &key, NULL, NULL, sb); ovs_list_push_back(sb_only, &od->list); } const struct nbrec_logical_switch *nbs; NBREC_LOGICAL_SWITCH_FOR_EACH (nbs, ctx->ovnnb_idl) { struct ovn_datapath *od = ovn_datapath_find(datapaths, &nbs->header_.uuid); if (od) { od->nbs = nbs; ovs_list_remove(&od->list); ovs_list_push_back(both, &od->list); ovn_datapath_update_external_ids(od); } else { od = ovn_datapath_create(datapaths, &nbs->header_.uuid, nbs, NULL, NULL); ovs_list_push_back(nb_only, &od->list); } init_ipam_info_for_datapath(od); } const struct nbrec_logical_router *nbr; NBREC_LOGICAL_ROUTER_FOR_EACH (nbr, ctx->ovnnb_idl) { if (!lrouter_is_enabled(nbr)) { continue; } struct ovn_datapath *od = ovn_datapath_find(datapaths, &nbr->header_.uuid); if (od) { if (!od->nbs) { od->nbr = nbr; ovs_list_remove(&od->list); ovs_list_push_back(both, &od->list); ovn_datapath_update_external_ids(od); } else { /* Can't happen! */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "duplicate UUID "UUID_FMT" in OVN_Northbound", UUID_ARGS(&nbr->header_.uuid)); continue; } } else { od = ovn_datapath_create(datapaths, &nbr->header_.uuid, NULL, nbr, NULL); ovs_list_push_back(nb_only, &od->list); } } } static uint32_t ovn_datapath_allocate_key(struct hmap *dp_tnlids) { static uint32_t hint; return allocate_tnlid(dp_tnlids, "datapath", (1u << 24) - 1, &hint); } /* Updates the southbound Datapath_Binding table so that it contains the * logical switches and routers specified by the northbound database. * * Initializes 'datapaths' to contain a "struct ovn_datapath" for every logical * switch and router. */ static void build_datapaths(struct northd_context *ctx, struct hmap *datapaths) { struct ovs_list sb_only, nb_only, both; join_datapaths(ctx, datapaths, &sb_only, &nb_only, &both); if (!ovs_list_is_empty(&nb_only)) { /* First index the in-use datapath tunnel IDs. */ struct hmap dp_tnlids = HMAP_INITIALIZER(&dp_tnlids); struct ovn_datapath *od; LIST_FOR_EACH (od, list, &both) { add_tnlid(&dp_tnlids, od->sb->tunnel_key); } /* Add southbound record for each unmatched northbound record. */ LIST_FOR_EACH (od, list, &nb_only) { uint16_t tunnel_key = ovn_datapath_allocate_key(&dp_tnlids); if (!tunnel_key) { break; } od->sb = sbrec_datapath_binding_insert(ctx->ovnsb_txn); ovn_datapath_update_external_ids(od); sbrec_datapath_binding_set_tunnel_key(od->sb, tunnel_key); } destroy_tnlids(&dp_tnlids); } /* Delete southbound records without northbound matches. */ struct ovn_datapath *od, *next; LIST_FOR_EACH_SAFE (od, next, list, &sb_only) { ovs_list_remove(&od->list); sbrec_datapath_binding_delete(od->sb); ovn_datapath_destroy(datapaths, od); } } struct ovn_port { struct hmap_node key_node; /* Index on 'key'. */ char *key; /* nbs->name, nbr->name, sb->logical_port. */ char *json_key; /* 'key', quoted for use in JSON. */ const struct sbrec_port_binding *sb; /* May be NULL. */ /* Logical switch port data. */ const struct nbrec_logical_switch_port *nbsp; /* May be NULL. */ struct lport_addresses *lsp_addrs; /* Logical switch port addresses. */ unsigned int n_lsp_addrs; struct lport_addresses *ps_addrs; /* Port security addresses. */ unsigned int n_ps_addrs; /* Logical router port data. */ const struct nbrec_logical_router_port *nbrp; /* May be NULL. */ struct lport_addresses lrp_networks; bool derived; /* Indicates whether this is an additional port * derived from nbsp or nbrp. */ /* The port's peer: * * - A switch port S of type "router" has a router port R as a peer, * and R in turn has S has its peer. * * - Two connected logical router ports have each other as peer. */ struct ovn_port *peer; struct ovn_datapath *od; struct ovs_list list; /* In list of similar records. */ }; static struct ovn_port * ovn_port_create(struct hmap *ports, const char *key, const struct nbrec_logical_switch_port *nbsp, const struct nbrec_logical_router_port *nbrp, const struct sbrec_port_binding *sb) { struct ovn_port *op = xzalloc(sizeof *op); struct ds json_key = DS_EMPTY_INITIALIZER; json_string_escape(key, &json_key); op->json_key = ds_steal_cstr(&json_key); op->key = xstrdup(key); op->sb = sb; op->nbsp = nbsp; op->nbrp = nbrp; op->derived = false; hmap_insert(ports, &op->key_node, hash_string(op->key, 0)); return op; } static void ovn_port_destroy(struct hmap *ports, struct ovn_port *port) { if (port) { /* Don't remove port->list. It is used within build_ports() as a * private list and once we've exited that function it is not safe to * use it. */ hmap_remove(ports, &port->key_node); for (int i = 0; i < port->n_lsp_addrs; i++) { destroy_lport_addresses(&port->lsp_addrs[i]); } free(port->lsp_addrs); for (int i = 0; i < port->n_ps_addrs; i++) { destroy_lport_addresses(&port->ps_addrs[i]); } free(port->ps_addrs); destroy_lport_addresses(&port->lrp_networks); free(port->json_key); free(port->key); free(port); } } static struct ovn_port * ovn_port_find(struct hmap *ports, const char *name) { struct ovn_port *op; HMAP_FOR_EACH_WITH_HASH (op, key_node, hash_string(name, 0), ports) { if (!strcmp(op->key, name)) { return op; } } return NULL; } static uint32_t ovn_port_allocate_key(struct ovn_datapath *od) { return allocate_tnlid(&od->port_tnlids, "port", (1u << 15) - 1, &od->port_key_hint); } static char * chassis_redirect_name(const char *port_name) { return xasprintf("cr-%s", port_name); } static bool ipam_is_duplicate_mac(struct eth_addr *ea, uint64_t mac64, bool warn) { struct macam_node *macam_node; HMAP_FOR_EACH_WITH_HASH (macam_node, hmap_node, hash_uint64(mac64), &macam) { if (eth_addr_equals(*ea, macam_node->mac_addr)) { if (warn) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "Duplicate MAC set: "ETH_ADDR_FMT, ETH_ADDR_ARGS(macam_node->mac_addr)); } return true; } } return false; } static void ipam_insert_mac(struct eth_addr *ea, bool check) { if (!ea) { return; } uint64_t mac64 = eth_addr_to_uint64(*ea); /* If the new MAC was not assigned by this address management system or * check is true and the new MAC is a duplicate, do not insert it into the * macam hmap. */ if (((mac64 ^ MAC_ADDR_PREFIX) >> 24) || (check && ipam_is_duplicate_mac(ea, mac64, true))) { return; } struct macam_node *new_macam_node = xmalloc(sizeof *new_macam_node); new_macam_node->mac_addr = *ea; hmap_insert(&macam, &new_macam_node->hmap_node, hash_uint64(mac64)); } static void ipam_insert_ip(struct ovn_datapath *od, uint32_t ip) { if (!od || !od->ipam_info || !od->ipam_info->allocated_ipv4s) { return; } if (ip >= od->ipam_info->start_ipv4 && ip < (od->ipam_info->start_ipv4 + od->ipam_info->total_ipv4s)) { bitmap_set1(od->ipam_info->allocated_ipv4s, ip - od->ipam_info->start_ipv4); } } static void ipam_insert_lsp_addresses(struct ovn_datapath *od, struct ovn_port *op, char *address) { if (!od || !op || !address || !strcmp(address, "unknown") || !strcmp(address, "router") || is_dynamic_lsp_address(address)) { return; } struct lport_addresses laddrs; if (!extract_lsp_addresses(address, &laddrs)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "Extract addresses failed."); return; } ipam_insert_mac(&laddrs.ea, true); /* IP is only added to IPAM if the switch's subnet option * is set, whereas MAC is always added to MACAM. */ if (!od->ipam_info || !od->ipam_info->allocated_ipv4s) { destroy_lport_addresses(&laddrs); return; } for (size_t j = 0; j < laddrs.n_ipv4_addrs; j++) { uint32_t ip = ntohl(laddrs.ipv4_addrs[j].addr); ipam_insert_ip(od, ip); } destroy_lport_addresses(&laddrs); } static void ipam_add_port_addresses(struct ovn_datapath *od, struct ovn_port *op) { if (!od || !op) { return; } if (op->nbsp) { /* Add all the port's addresses to address data structures. */ for (size_t i = 0; i < op->nbsp->n_addresses; i++) { ipam_insert_lsp_addresses(od, op, op->nbsp->addresses[i]); } if (op->nbsp->dynamic_addresses) { ipam_insert_lsp_addresses(od, op, op->nbsp->dynamic_addresses); } } else if (op->nbrp) { struct lport_addresses lrp_networks; if (!extract_lrp_networks(op->nbrp, &lrp_networks)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "Extract addresses failed."); return; } ipam_insert_mac(&lrp_networks.ea, true); if (!op->peer || !op->peer->nbsp || !op->peer->od || !op->peer->od->nbs || !smap_get(&op->peer->od->nbs->other_config, "subnet")) { destroy_lport_addresses(&lrp_networks); return; } for (size_t i = 0; i < lrp_networks.n_ipv4_addrs; i++) { uint32_t ip = ntohl(lrp_networks.ipv4_addrs[i].addr); ipam_insert_ip(op->peer->od, ip); } destroy_lport_addresses(&lrp_networks); } } static uint64_t ipam_get_unused_mac(void) { /* Stores the suffix of the most recently ipam-allocated MAC address. */ static uint32_t last_mac; uint64_t mac64; struct eth_addr mac; uint32_t mac_addr_suffix, i; for (i = 0; i < MAC_ADDR_SPACE - 1; i++) { /* The tentative MAC's suffix will be in the interval (1, 0xfffffe). */ mac_addr_suffix = ((last_mac + i) % (MAC_ADDR_SPACE - 1)) + 1; mac64 = MAC_ADDR_PREFIX | mac_addr_suffix; eth_addr_from_uint64(mac64, &mac); if (!ipam_is_duplicate_mac(&mac, mac64, false)) { last_mac = mac_addr_suffix; break; } } if (i == MAC_ADDR_SPACE) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "MAC address space exhausted."); mac64 = 0; } return mac64; } static uint32_t ipam_get_unused_ip(struct ovn_datapath *od) { if (!od || !od->ipam_info || !od->ipam_info->allocated_ipv4s) { return 0; } size_t new_ip_index = bitmap_scan(od->ipam_info->allocated_ipv4s, 0, 0, od->ipam_info->total_ipv4s - 1); if (new_ip_index == od->ipam_info->total_ipv4s - 1) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL( &rl, "Subnet address space has been exhausted."); return 0; } return od->ipam_info->start_ipv4 + new_ip_index; } static bool ipam_allocate_addresses(struct ovn_datapath *od, struct ovn_port *op, const char *addrspec) { if (!op->nbsp || !od->ipam_info) { return false; } /* Get or generate MAC address. */ struct eth_addr mac; bool dynamic_mac; int n = 0; if (ovs_scan(addrspec, ETH_ADDR_SCAN_FMT" dynamic%n", ETH_ADDR_SCAN_ARGS(mac), &n) && addrspec[n] == '\0') { dynamic_mac = false; } else { uint64_t mac64 = ipam_get_unused_mac(); if (!mac64) { return false; } eth_addr_from_uint64(mac64, &mac); dynamic_mac = true; } /* Generate IPv4 address, if desirable. */ bool dynamic_ip4 = od->ipam_info->allocated_ipv4s != NULL; uint32_t ip4 = dynamic_ip4 ? ipam_get_unused_ip(od) : 0; /* Generate IPv6 address, if desirable. */ bool dynamic_ip6 = od->ipam_info->ipv6_prefix_set; struct in6_addr ip6; if (dynamic_ip6) { in6_generate_eui64(mac, &od->ipam_info->ipv6_prefix, &ip6); } /* If we didn't generate anything, bail out. */ if (!dynamic_ip4 && !dynamic_ip6) { return false; } /* Save the dynamic addresses. */ struct ds new_addr = DS_EMPTY_INITIALIZER; ds_put_format(&new_addr, ETH_ADDR_FMT, ETH_ADDR_ARGS(mac)); if (dynamic_ip4 && ip4) { ipam_insert_ip(od, ip4); ds_put_format(&new_addr, " "IP_FMT, IP_ARGS(htonl(ip4))); } if (dynamic_ip6) { char ip6_s[INET6_ADDRSTRLEN + 1]; ipv6_string_mapped(ip6_s, &ip6); ds_put_format(&new_addr, " %s", ip6_s); } ipam_insert_mac(&mac, !dynamic_mac); nbrec_logical_switch_port_set_dynamic_addresses(op->nbsp, ds_cstr(&new_addr)); ds_destroy(&new_addr); return true; } static void build_ipam(struct hmap *datapaths, struct hmap *ports) { /* IPAM generally stands for IP address management. In non-virtualized * world, MAC addresses come with the hardware. But, with virtualized * workloads, they need to be assigned and managed. This function * does both IP address management (ipam) and MAC address management * (macam). */ /* If the switch's other_config:subnet is set, allocate new addresses for * ports that have the "dynamic" keyword in their addresses column. */ struct ovn_datapath *od; HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs || !od->ipam_info) { continue; } struct ovn_port *op; for (size_t i = 0; i < od->nbs->n_ports; i++) { const struct nbrec_logical_switch_port *nbsp = od->nbs->ports[i]; if (!nbsp) { continue; } op = ovn_port_find(ports, nbsp->name); if (!op || (op->nbsp && op->peer)) { /* Do not allocate addresses for logical switch ports that * have a peer. */ continue; } for (size_t j = 0; j < nbsp->n_addresses; j++) { if (is_dynamic_lsp_address(nbsp->addresses[j]) && !nbsp->dynamic_addresses) { if (!ipam_allocate_addresses(od, op, nbsp->addresses[j]) || !extract_lsp_addresses(nbsp->dynamic_addresses, &op->lsp_addrs[op->n_lsp_addrs])) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_INFO_RL(&rl, "Failed to allocate address."); } else { op->n_lsp_addrs++; } break; } } if (!nbsp->n_addresses && nbsp->dynamic_addresses) { nbrec_logical_switch_port_set_dynamic_addresses(op->nbsp, NULL); } } } } /* Tag allocation for nested containers. * * For a logical switch port with 'parent_name' and a request to allocate tags, * keeps a track of all allocated tags. */ struct tag_alloc_node { struct hmap_node hmap_node; char *parent_name; unsigned long *allocated_tags; /* A bitmap to track allocated tags. */ }; static void tag_alloc_destroy(struct hmap *tag_alloc_table) { struct tag_alloc_node *node; HMAP_FOR_EACH_POP (node, hmap_node, tag_alloc_table) { bitmap_free(node->allocated_tags); free(node->parent_name); free(node); } hmap_destroy(tag_alloc_table); } static struct tag_alloc_node * tag_alloc_get_node(struct hmap *tag_alloc_table, const char *parent_name) { /* If a node for the 'parent_name' exists, return it. */ struct tag_alloc_node *tag_alloc_node; HMAP_FOR_EACH_WITH_HASH (tag_alloc_node, hmap_node, hash_string(parent_name, 0), tag_alloc_table) { if (!strcmp(tag_alloc_node->parent_name, parent_name)) { return tag_alloc_node; } } /* Create a new node. */ tag_alloc_node = xmalloc(sizeof *tag_alloc_node); tag_alloc_node->parent_name = xstrdup(parent_name); tag_alloc_node->allocated_tags = bitmap_allocate(MAX_OVN_TAGS); /* Tag 0 is invalid for nested containers. */ bitmap_set1(tag_alloc_node->allocated_tags, 0); hmap_insert(tag_alloc_table, &tag_alloc_node->hmap_node, hash_string(parent_name, 0)); return tag_alloc_node; } static void tag_alloc_add_existing_tags(struct hmap *tag_alloc_table, const struct nbrec_logical_switch_port *nbsp) { /* Add the tags of already existing nested containers. If there is no * 'nbsp->parent_name' or no 'nbsp->tag' set, there is nothing to do. */ if (!nbsp->parent_name || !nbsp->parent_name[0] || !nbsp->tag) { return; } struct tag_alloc_node *tag_alloc_node; tag_alloc_node = tag_alloc_get_node(tag_alloc_table, nbsp->parent_name); bitmap_set1(tag_alloc_node->allocated_tags, *nbsp->tag); } static void tag_alloc_create_new_tag(struct hmap *tag_alloc_table, const struct nbrec_logical_switch_port *nbsp) { if (!nbsp->tag_request) { return; } if (nbsp->parent_name && nbsp->parent_name[0] && *nbsp->tag_request == 0) { /* For nested containers that need allocation, do the allocation. */ if (nbsp->tag) { /* This has already been allocated. */ return; } struct tag_alloc_node *tag_alloc_node; int64_t tag; tag_alloc_node = tag_alloc_get_node(tag_alloc_table, nbsp->parent_name); tag = bitmap_scan(tag_alloc_node->allocated_tags, 0, 1, MAX_OVN_TAGS); if (tag == MAX_OVN_TAGS) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_ERR_RL(&rl, "out of vlans for logical switch ports with " "parent %s", nbsp->parent_name); return; } bitmap_set1(tag_alloc_node->allocated_tags, tag); nbrec_logical_switch_port_set_tag(nbsp, &tag, 1); } else if (*nbsp->tag_request != 0) { /* For everything else, copy the contents of 'tag_request' to 'tag'. */ nbrec_logical_switch_port_set_tag(nbsp, nbsp->tag_request, 1); } } /* * This function checks if the MAC in "address" parameter (if present) is * different from the one stored in Logical_Switch_Port.dynamic_addresses * and updates it. */ static void check_and_update_mac_in_dynamic_addresses( const char *address, const struct nbrec_logical_switch_port *nbsp) { if (!nbsp->dynamic_addresses) { return; } int buf_index = 0; struct eth_addr ea; if (!ovs_scan_len(address, &buf_index, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(ea))) { return; } struct eth_addr present_ea; buf_index = 0; if (ovs_scan_len(nbsp->dynamic_addresses, &buf_index, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(present_ea)) && !eth_addr_equals(ea, present_ea)) { /* MAC address has changed. Update it */ char *new_addr = xasprintf( ETH_ADDR_FMT"%s", ETH_ADDR_ARGS(ea),  ->dynamic_addresses[buf_index]); nbrec_logical_switch_port_set_dynamic_addresses( nbsp, new_addr); free(new_addr); } } static void join_logical_ports(struct northd_context *ctx, struct hmap *datapaths, struct hmap *ports, struct hmap *chassis_qdisc_queues, struct hmap *tag_alloc_table, struct ovs_list *sb_only, struct ovs_list *nb_only, struct ovs_list *both) { hmap_init(ports); ovs_list_init(sb_only); ovs_list_init(nb_only); ovs_list_init(both); const struct sbrec_port_binding *sb; SBREC_PORT_BINDING_FOR_EACH (sb, ctx->ovnsb_idl) { struct ovn_port *op = ovn_port_create(ports, sb->logical_port, NULL, NULL, sb); ovs_list_push_back(sb_only, &op->list); } struct ovn_datapath *od; HMAP_FOR_EACH (od, key_node, datapaths) { if (od->nbs) { for (size_t i = 0; i < od->nbs->n_ports; i++) { const struct nbrec_logical_switch_port *nbsp = od->nbs->ports[i]; struct ovn_port *op = ovn_port_find(ports, nbsp->name); if (op) { if (op->nbsp || op->nbrp) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "duplicate logical port %s", nbsp->name); continue; } op->nbsp = nbsp; ovs_list_remove(&op->list); uint32_t queue_id = smap_get_int(&op->sb->options, "qdisc_queue_id", 0); if (queue_id && op->sb->chassis) { add_chassis_queue( chassis_qdisc_queues, &op->sb->chassis->header_.uuid, queue_id); } ovs_list_push_back(both, &op->list); /* This port exists due to a SB binding, but should * not have been initialized fully. */ ovs_assert(!op->n_lsp_addrs && !op->n_ps_addrs); } else { op = ovn_port_create(ports, nbsp->name, nbsp, NULL, NULL); ovs_list_push_back(nb_only, &op->list); } if (!strcmp(nbsp->type, "localnet")) { od->localnet_port = op; } op->lsp_addrs = xmalloc(sizeof *op->lsp_addrs * nbsp->n_addresses); for (size_t j = 0; j < nbsp->n_addresses; j++) { if (!strcmp(nbsp->addresses[j], "unknown") || !strcmp(nbsp->addresses[j], "router")) { continue; } if (is_dynamic_lsp_address(nbsp->addresses[j])) { if (nbsp->dynamic_addresses) { check_and_update_mac_in_dynamic_addresses( nbsp->addresses[j], nbsp); if (!extract_lsp_addresses(nbsp->dynamic_addresses, &op->lsp_addrs[op->n_lsp_addrs])) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_INFO_RL(&rl, "invalid syntax '%s' in " "logical switch port " "dynamic_addresses. No " "MAC address found", op->nbsp->dynamic_addresses); continue; } } else { continue; } } else if (!extract_lsp_addresses(nbsp->addresses[j], &op->lsp_addrs[op->n_lsp_addrs])) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_INFO_RL(&rl, "invalid syntax '%s' in logical " "switch port addresses. No MAC " "address found", op->nbsp->addresses[j]); continue; } op->n_lsp_addrs++; } op->ps_addrs = xmalloc(sizeof *op->ps_addrs * nbsp->n_port_security); for (size_t j = 0; j < nbsp->n_port_security; j++) { if (!extract_lsp_addresses(nbsp->port_security[j], &op->ps_addrs[op->n_ps_addrs])) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_INFO_RL(&rl, "invalid syntax '%s' in port " "security. No MAC address found", op->nbsp->port_security[j]); continue; } op->n_ps_addrs++; } op->od = od; ipam_add_port_addresses(od, op); tag_alloc_add_existing_tags(tag_alloc_table, nbsp); } } else { for (size_t i = 0; i < od->nbr->n_ports; i++) { const struct nbrec_logical_router_port *nbrp = od->nbr->ports[i]; struct lport_addresses lrp_networks; if (!extract_lrp_networks(nbrp, &lrp_networks)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad 'mac' %s", nbrp->mac); continue; } if (!lrp_networks.n_ipv4_addrs && !lrp_networks.n_ipv6_addrs) { continue; } struct ovn_port *op = ovn_port_find(ports, nbrp->name); if (op) { if (op->nbsp || op->nbrp) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "duplicate logical router port %s", nbrp->name); continue; } op->nbrp = nbrp; ovs_list_remove(&op->list); ovs_list_push_back(both, &op->list); /* This port exists but should not have been * initialized fully. */ ovs_assert(!op->lrp_networks.n_ipv4_addrs && !op->lrp_networks.n_ipv6_addrs); } else { op = ovn_port_create(ports, nbrp->name, NULL, nbrp, NULL); ovs_list_push_back(nb_only, &op->list); } op->lrp_networks = lrp_networks; op->od = od; ipam_add_port_addresses(op->od, op); const char *redirect_chassis = smap_get(&op->nbrp->options, "redirect-chassis"); if (redirect_chassis || op->nbrp->n_gateway_chassis) { /* Additional "derived" ovn_port crp represents the * instance of op on the "redirect-chassis". */ const char *gw_chassis = smap_get(&op->od->nbr->options, "chassis"); if (gw_chassis) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "Bad configuration: " "redirect-chassis configured on port %s " "on L3 gateway router", nbrp->name); continue; } if (od->l3dgw_port || od->l3redirect_port) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "Bad configuration: multiple ports " "with redirect-chassis on same logical " "router %s", od->nbr->name); continue; } char *redirect_name = chassis_redirect_name(nbrp->name); struct ovn_port *crp = ovn_port_find(ports, redirect_name); if (crp) { crp->derived = true; crp->nbrp = nbrp; ovs_list_remove(&crp->list); ovs_list_push_back(both, &crp->list); } else { crp = ovn_port_create(ports, redirect_name, NULL, nbrp, NULL); crp->derived = true; ovs_list_push_back(nb_only, &crp->list); } crp->od = od; free(redirect_name); /* Set l3dgw_port and l3redirect_port in od, for later * use during flow creation. */ od->l3dgw_port = op; od->l3redirect_port = crp; } } } } /* Connect logical router ports, and logical switch ports of type "router", * to their peers. */ struct ovn_port *op; HMAP_FOR_EACH (op, key_node, ports) { if (op->nbsp && !strcmp(op->nbsp->type, "router") && !op->derived) { const char *peer_name = smap_get(&op->nbsp->options, "router-port"); if (!peer_name) { continue; } struct ovn_port *peer = ovn_port_find(ports, peer_name); if (!peer || !peer->nbrp) { continue; } peer->peer = op; op->peer = peer; op->od->router_ports = xrealloc( op->od->router_ports, sizeof *op->od->router_ports * (op->od->n_router_ports + 1)); op->od->router_ports[op->od->n_router_ports++] = op; /* Fill op->lsp_addrs for op->nbsp->addresses[] with * contents "router", which was skipped in the loop above. */ for (size_t j = 0; j < op->nbsp->n_addresses; j++) { if (!strcmp(op->nbsp->addresses[j], "router")) { if (extract_lrp_networks(peer->nbrp, &op->lsp_addrs[op->n_lsp_addrs])) { op->n_lsp_addrs++; } break; } } } else if (op->nbrp && op->nbrp->peer && !op->derived) { struct ovn_port *peer = ovn_port_find(ports, op->nbrp->peer); if (peer) { if (peer->nbrp) { op->peer = peer; } else if (peer->nbsp) { /* An ovn_port for a switch port of type "router" does have * a router port as its peer (see the case above for * "router" ports), but this is set via options:router-port * in Logical_Switch_Port and does not involve the * Logical_Router_Port's 'peer' column. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "Bad configuration: The peer of router " "port %s is a switch port", op->key); } } } } } static void ip_address_and_port_from_lb_key(const char *key, char **ip_address, uint16_t *port, int *addr_family); static void get_router_load_balancer_ips(const struct ovn_datapath *od, struct sset *all_ips, int *addr_family) { if (!od->nbr) { return; } for (int i = 0; i < od->nbr->n_load_balancer; i++) { struct nbrec_load_balancer *lb = od->nbr->load_balancer[i]; struct smap *vips = &lb->vips; struct smap_node *node; SMAP_FOR_EACH (node, vips) { /* node->key contains IP:port or just IP. */ char *ip_address = NULL; uint16_t port; ip_address_and_port_from_lb_key(node->key, &ip_address, &port, addr_family); if (!ip_address) { continue; } if (!sset_contains(all_ips, ip_address)) { sset_add(all_ips, ip_address); } free(ip_address); } } } /* Returns an array of strings, each consisting of a MAC address followed * by one or more IP addresses, and if the port is a distributed gateway * port, followed by 'is_chassis_resident("LPORT_NAME")', where the * LPORT_NAME is the name of the L3 redirect port or the name of the * logical_port specified in a NAT rule. These strings include the * external IP addresses of all NAT rules defined on that router, and all * of the IP addresses used in load balancer VIPs defined on that router. * * The caller must free each of the n returned strings with free(), * and must free the returned array when it is no longer needed. */ static char ** get_nat_addresses(const struct ovn_port *op, size_t *n) { size_t n_nats = 0; struct eth_addr mac; if (!op->nbrp || !op->od || !op->od->nbr || (!op->od->nbr->n_nat && !op->od->nbr->n_load_balancer) || !eth_addr_from_string(op->nbrp->mac, &mac)) { *n = n_nats; return NULL; } struct ds c_addresses = DS_EMPTY_INITIALIZER; ds_put_format(&c_addresses, ETH_ADDR_FMT, ETH_ADDR_ARGS(mac)); bool central_ip_address = false; char **addresses; addresses = xmalloc(sizeof *addresses * (op->od->nbr->n_nat + 1)); /* Get NAT IP addresses. */ for (size_t i = 0; i < op->od->nbr->n_nat; i++) { const struct nbrec_nat *nat = op->od->nbr->nat[i]; ovs_be32 ip, mask; char *error = ip_parse_masked(nat->external_ip, &ip, &mask); if (error || mask != OVS_BE32_MAX) { free(error); continue; } /* Determine whether this NAT rule satisfies the conditions for * distributed NAT processing. */ if (op->od->l3redirect_port && !strcmp(nat->type, "dnat_and_snat") && nat->logical_port && nat->external_mac) { /* Distributed NAT rule. */ if (eth_addr_from_string(nat->external_mac, &mac)) { struct ds address = DS_EMPTY_INITIALIZER; ds_put_format(&address, ETH_ADDR_FMT, ETH_ADDR_ARGS(mac)); ds_put_format(&address, " %s", nat->external_ip); ds_put_format(&address, " is_chassis_resident(\"%s\")", nat->logical_port); addresses[n_nats++] = ds_steal_cstr(&address); } } else { /* Centralized NAT rule, either on gateway router or distributed * router. */ ds_put_format(&c_addresses, " %s", nat->external_ip); central_ip_address = true; } } /* A set to hold all load-balancer vips. */ struct sset all_ips = SSET_INITIALIZER(&all_ips); int addr_family; get_router_load_balancer_ips(op->od, &all_ips, &addr_family); const char *ip_address; SSET_FOR_EACH (ip_address, &all_ips) { ds_put_format(&c_addresses, " %s", ip_address); central_ip_address = true; } sset_destroy(&all_ips); if (central_ip_address) { /* Gratuitous ARP for centralized NAT rules on distributed gateway * ports should be restricted to the "redirect-chassis". */ if (op->od->l3redirect_port) { ds_put_format(&c_addresses, " is_chassis_resident(%s)", op->od->l3redirect_port->json_key); } addresses[n_nats++] = ds_steal_cstr(&c_addresses); } *n = n_nats; return addresses; } static bool gateway_chassis_equal(const struct nbrec_gateway_chassis *nb_gwc, const struct sbrec_chassis *nb_gwc_c, const struct sbrec_gateway_chassis *sb_gwc) { bool equal = !strcmp(nb_gwc->name, sb_gwc->name) && nb_gwc->priority == sb_gwc->priority && smap_equal(&nb_gwc->options, &sb_gwc->options) && smap_equal(&nb_gwc->external_ids, &sb_gwc->external_ids); if (!equal) { return false; } /* If everything else matched and we were unable to find the SBDB * Chassis entry at this time, assume a match and return true. * This happens when an ovn-controller is restarting and the Chassis * entry is gone away momentarily */ return !nb_gwc_c || (sb_gwc->chassis && !strcmp(nb_gwc_c->name, sb_gwc->chassis->name)); } static bool sbpb_gw_chassis_needs_update( const struct sbrec_port_binding *port_binding, const struct nbrec_logical_router_port *lrp, const struct chassis_index *chassis_index) { if (!lrp || !port_binding) { return false; } /* These arrays are used to collect valid Gateway_Chassis and valid * Chassis records from the Logical_Router_Port Gateway_Chassis list, * we ignore the ones we can't match on the SBDB */ struct nbrec_gateway_chassis **lrp_gwc = xzalloc(lrp->n_gateway_chassis * sizeof *lrp_gwc); const struct sbrec_chassis **lrp_gwc_c = xzalloc(lrp->n_gateway_chassis * sizeof *lrp_gwc_c); /* Count the number of gateway chassis chassis names from the logical * router port that we are able to match on the southbound database */ int lrp_n_gateway_chassis = 0; int n; for (n = 0; n < lrp->n_gateway_chassis; n++) { if (!lrp->gateway_chassis[n]->chassis_name) { continue; } const struct sbrec_chassis *chassis = chassis_lookup_by_name(chassis_index, lrp->gateway_chassis[n]->chassis_name); lrp_gwc_c[lrp_n_gateway_chassis] = chassis; lrp_gwc[lrp_n_gateway_chassis] = lrp->gateway_chassis[n]; lrp_n_gateway_chassis++; if (!chassis) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL( &rl, "Chassis name %s referenced in NBDB via Gateway_Chassis " "on logical router port %s does not exist in SBDB", lrp->gateway_chassis[n]->chassis_name, lrp->name); } } /* Basic check, different amount of Gateway_Chassis means that we * need to update southbound database Port_Binding */ if (lrp_n_gateway_chassis != port_binding->n_gateway_chassis) { free(lrp_gwc_c); free(lrp_gwc); return true; } for (n = 0; n < lrp_n_gateway_chassis; n++) { int i; /* For each of the valid gw chassis on the lrp, check if there's * a match on the Port_Binding list, we assume order is not * persisted */ for (i = 0; i < port_binding->n_gateway_chassis; i++) { if (gateway_chassis_equal(lrp_gwc[n], lrp_gwc_c[n], port_binding->gateway_chassis[i])) { break; /* we found a match */ } } /* if no Port_Binding gateway chassis matched for the entry... */ if (i == port_binding->n_gateway_chassis) { free(lrp_gwc_c); free(lrp_gwc); return true; /* found no match for this gateway chassis on lrp */ } } /* no need for update, all ports matched */ free(lrp_gwc_c); free(lrp_gwc); return false; } /* This functions translates the gw chassis on the nb database * to sb database entries, the only difference is that SB database * Gateway_Chassis table references the chassis directly instead * of using the name */ static void copy_gw_chassis_from_nbrp_to_sbpb( struct northd_context *ctx, const struct nbrec_logical_router_port *lrp, const struct chassis_index *chassis_index, const struct sbrec_port_binding *port_binding) { if (!lrp || !port_binding || !lrp->n_gateway_chassis) { return; } struct sbrec_gateway_chassis **gw_chassis = NULL; int n_gwc = 0; int n; /* XXX: This can be improved. This code will generate a set of new * Gateway_Chassis and push them all in a single transaction, instead * this would be more optimal if we just add/update/remove the rows in * the southbound db that need to change. We don't expect lots of * changes to the Gateway_Chassis table, but if that proves to be wrong * we should optimize this. */ for (n = 0; n < lrp->n_gateway_chassis; n++) { struct nbrec_gateway_chassis *lrp_gwc = lrp->gateway_chassis[n]; if (!lrp_gwc->chassis_name) { continue; } const struct sbrec_chassis *chassis = chassis_lookup_by_name(chassis_index, lrp_gwc->chassis_name); gw_chassis = xrealloc(gw_chassis, (n_gwc + 1) * sizeof *gw_chassis); struct sbrec_gateway_chassis *pb_gwc = sbrec_gateway_chassis_insert(ctx->ovnsb_txn); sbrec_gateway_chassis_set_name(pb_gwc, lrp_gwc->name); sbrec_gateway_chassis_set_priority(pb_gwc, lrp_gwc->priority); sbrec_gateway_chassis_set_chassis(pb_gwc, chassis); sbrec_gateway_chassis_set_options(pb_gwc, &lrp_gwc->options); sbrec_gateway_chassis_set_external_ids(pb_gwc, &lrp_gwc->external_ids); gw_chassis[n_gwc++] = pb_gwc; } sbrec_port_binding_set_gateway_chassis(port_binding, gw_chassis, n_gwc); free(gw_chassis); } static void ovn_port_update_sbrec(struct northd_context *ctx, const struct ovn_port *op, const struct chassis_index *chassis_index, struct hmap *chassis_qdisc_queues) { sbrec_port_binding_set_datapath(op->sb, op->od->sb); if (op->nbrp) { /* If the router is for l3 gateway, it resides on a chassis * and its port type is "l3gateway". */ const char *chassis_name = smap_get(&op->od->nbr->options, "chassis"); if (op->derived) { sbrec_port_binding_set_type(op->sb, "chassisredirect"); } else if (chassis_name) { sbrec_port_binding_set_type(op->sb, "l3gateway"); } else { sbrec_port_binding_set_type(op->sb, "patch"); } struct smap new; smap_init(&new); if (op->derived) { const char *redirect_chassis = smap_get(&op->nbrp->options, "redirect-chassis"); if (op->nbrp->n_gateway_chassis && redirect_chassis) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL( &rl, "logical router port %s has both options:" "redirect-chassis and gateway_chassis populated " "redirect-chassis will be ignored in favour of " "gateway chassis", op->nbrp->name); } if (op->nbrp->n_gateway_chassis) { if (sbpb_gw_chassis_needs_update(op->sb, op->nbrp, chassis_index)) { copy_gw_chassis_from_nbrp_to_sbpb(ctx, op->nbrp, chassis_index, op->sb); } } else if (redirect_chassis) { /* Handle ports that had redirect-chassis option attached * to them, and for backwards compatibility convert them * to a single Gateway_Chassis entry */ const struct sbrec_chassis *chassis = chassis_lookup_by_name(chassis_index, redirect_chassis); if (chassis) { /* If we found the chassis, and the gw chassis on record * differs from what we expect go ahead and update */ if (op->sb->n_gateway_chassis != 1 || !op->sb->gateway_chassis[0]->chassis || strcmp(op->sb->gateway_chassis[0]->chassis->name, chassis->name) || op->sb->gateway_chassis[0]->priority != 0) { /* Construct a single Gateway_Chassis entry on the * Port_Binding attached to the redirect_chassis * name */ struct sbrec_gateway_chassis *gw_chassis = sbrec_gateway_chassis_insert(ctx->ovnsb_txn); char *gwc_name = xasprintf("%s_%s", op->nbrp->name, chassis->name); /* XXX: Again, here, we could just update an existing * Gateway_Chassis, instead of creating a new one * and replacing it */ sbrec_gateway_chassis_set_name(gw_chassis, gwc_name); sbrec_gateway_chassis_set_priority(gw_chassis, 0); sbrec_gateway_chassis_set_chassis(gw_chassis, chassis); sbrec_gateway_chassis_set_external_ids(gw_chassis, &op->nbrp->external_ids); sbrec_port_binding_set_gateway_chassis(op->sb, &gw_chassis, 1); free(gwc_name); } } else { VLOG_WARN("chassis name '%s' from redirect from logical " " router port '%s' redirect-chassis not found", redirect_chassis, op->nbrp->name); if (op->sb->n_gateway_chassis) { sbrec_port_binding_set_gateway_chassis(op->sb, NULL, 0); } } } smap_add(&new, "distributed-port", op->nbrp->name); } else { if (op->peer) { smap_add(&new, "peer", op->peer->key); } if (chassis_name) { smap_add(&new, "l3gateway-chassis", chassis_name); } } sbrec_port_binding_set_options(op->sb, &new); smap_destroy(&new); sbrec_port_binding_set_parent_port(op->sb, NULL); sbrec_port_binding_set_tag(op->sb, NULL, 0); sbrec_port_binding_set_mac(op->sb, NULL, 0); struct smap ids = SMAP_INITIALIZER(&ids); sbrec_port_binding_set_external_ids(op->sb, &ids); } else { if (strcmp(op->nbsp->type, "router")) { uint32_t queue_id = smap_get_int( &op->sb->options, "qdisc_queue_id", 0); bool has_qos = port_has_qos_params(&op->nbsp->options); struct smap options; if (op->sb->chassis && has_qos && !queue_id) { queue_id = allocate_chassis_queueid(chassis_qdisc_queues, op->sb->chassis); } else if (!has_qos && queue_id) { free_chassis_queueid(chassis_qdisc_queues, op->sb->chassis, queue_id); queue_id = 0; } smap_clone(&options, &op->nbsp->options); if (queue_id) { smap_add_format(&options, "qdisc_queue_id", "%d", queue_id); } sbrec_port_binding_set_options(op->sb, &options); smap_destroy(&options); if (ovn_is_known_nb_lsp_type(op->nbsp->type)) { sbrec_port_binding_set_type(op->sb, op->nbsp->type); } else { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL( &rl, "Unknown port type '%s' set on logical switch '%s'.", op->nbsp->type, op->nbsp->name); } } else { const char *chassis = NULL; if (op->peer && op->peer->od && op->peer->od->nbr) { chassis = smap_get(&op->peer->od->nbr->options, "chassis"); } /* A switch port connected to a gateway router is also of * type "l3gateway". */ if (chassis) { sbrec_port_binding_set_type(op->sb, "l3gateway"); } else { sbrec_port_binding_set_type(op->sb, "patch"); } const char *router_port = smap_get(&op->nbsp->options, "router-port"); if (router_port || chassis) { struct smap new; smap_init(&new); if (router_port) { smap_add(&new, "peer", router_port); } if (chassis) { smap_add(&new, "l3gateway-chassis", chassis); } sbrec_port_binding_set_options(op->sb, &new); smap_destroy(&new); } const char *nat_addresses = smap_get(&op->nbsp->options, "nat-addresses"); if (nat_addresses && !strcmp(nat_addresses, "router")) { if (op->peer && op->peer->od && (chassis || op->peer->od->l3redirect_port)) { size_t n_nats; char **nats = get_nat_addresses(op->peer, &n_nats); if (n_nats) { sbrec_port_binding_set_nat_addresses(op->sb, (const char **) nats, n_nats); for (size_t i = 0; i < n_nats; i++) { free(nats[i]); } free(nats); } else { sbrec_port_binding_set_nat_addresses(op->sb, NULL, 0); } } else { sbrec_port_binding_set_nat_addresses(op->sb, NULL, 0); } /* Only accept manual specification of ethernet address * followed by IPv4 addresses on type "l3gateway" ports. */ } else if (nat_addresses && chassis) { struct lport_addresses laddrs; if (!extract_lsp_addresses(nat_addresses, &laddrs)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_WARN_RL(&rl, "Error extracting nat-addresses."); sbrec_port_binding_set_nat_addresses(op->sb, NULL, 0); } else { sbrec_port_binding_set_nat_addresses(op->sb, &nat_addresses, 1); destroy_lport_addresses(&laddrs); } } else { sbrec_port_binding_set_nat_addresses(op->sb, NULL, 0); } } sbrec_port_binding_set_parent_port(op->sb, op->nbsp->parent_name); sbrec_port_binding_set_tag(op->sb, op->nbsp->tag, op->nbsp->n_tag); sbrec_port_binding_set_mac(op->sb, (const char **) op->nbsp->addresses, op->nbsp->n_addresses); struct smap ids = SMAP_INITIALIZER(&ids); smap_clone(&ids, &op->nbsp->external_ids); const char *name = smap_get(&ids, "neutron:port_name"); if (name && name[0]) { smap_add(&ids, "name", name); } sbrec_port_binding_set_external_ids(op->sb, &ids); smap_destroy(&ids); } } /* Remove mac_binding entries that refer to logical_ports which are * deleted. */ static void cleanup_mac_bindings(struct northd_context *ctx, struct hmap *ports) { const struct sbrec_mac_binding *b, *n; SBREC_MAC_BINDING_FOR_EACH_SAFE (b, n, ctx->ovnsb_idl) { if (!ovn_port_find(ports, b->logical_port)) { sbrec_mac_binding_delete(b); } } } /* Updates the southbound Port_Binding table so that it contains the logical * switch ports specified by the northbound database. * * Initializes 'ports' to contain a "struct ovn_port" for every logical port, * using the "struct ovn_datapath"s in 'datapaths' to look up logical * datapaths. */ static void build_ports(struct northd_context *ctx, struct hmap *datapaths, const struct chassis_index *chassis_index, struct hmap *ports) { struct ovs_list sb_only, nb_only, both; struct hmap tag_alloc_table = HMAP_INITIALIZER(&tag_alloc_table); struct hmap chassis_qdisc_queues = HMAP_INITIALIZER(&chassis_qdisc_queues); join_logical_ports(ctx, datapaths, ports, &chassis_qdisc_queues, &tag_alloc_table, &sb_only, &nb_only, &both); struct ovn_port *op, *next; /* For logical ports that are in both databases, update the southbound * record based on northbound data. Also index the in-use tunnel_keys. * For logical ports that are in NB database, do any tag allocation * needed. */ LIST_FOR_EACH_SAFE (op, next, list, &both) { if (op->nbsp) { tag_alloc_create_new_tag(&tag_alloc_table, op->nbsp); } ovn_port_update_sbrec(ctx, op, chassis_index, &chassis_qdisc_queues); add_tnlid(&op->od->port_tnlids, op->sb->tunnel_key); if (op->sb->tunnel_key > op->od->port_key_hint) { op->od->port_key_hint = op->sb->tunnel_key; } } /* Add southbound record for each unmatched northbound record. */ LIST_FOR_EACH_SAFE (op, next, list, &nb_only) { uint16_t tunnel_key = ovn_port_allocate_key(op->od); if (!tunnel_key) { continue; } op->sb = sbrec_port_binding_insert(ctx->ovnsb_txn); ovn_port_update_sbrec(ctx, op, chassis_index, &chassis_qdisc_queues); sbrec_port_binding_set_logical_port(op->sb, op->key); sbrec_port_binding_set_tunnel_key(op->sb, tunnel_key); } bool remove_mac_bindings = false; if (!ovs_list_is_empty(&sb_only)) { remove_mac_bindings = true; } /* Delete southbound records without northbound matches. */ LIST_FOR_EACH_SAFE(op, next, list, &sb_only) { ovs_list_remove(&op->list); sbrec_port_binding_delete(op->sb); ovn_port_destroy(ports, op); } if (remove_mac_bindings) { cleanup_mac_bindings(ctx, ports); } tag_alloc_destroy(&tag_alloc_table); destroy_chassis_queues(&chassis_qdisc_queues); } #define OVN_MIN_MULTICAST 32768 #define OVN_MAX_MULTICAST 65535 struct multicast_group { const char *name; uint16_t key; /* OVN_MIN_MULTICAST...OVN_MAX_MULTICAST. */ }; #define MC_FLOOD "_MC_flood" static const struct multicast_group mc_flood = { MC_FLOOD, 65535 }; #define MC_UNKNOWN "_MC_unknown" static const struct multicast_group mc_unknown = { MC_UNKNOWN, 65534 }; static bool multicast_group_equal(const struct multicast_group *a, const struct multicast_group *b) { return !strcmp(a->name, b->name) && a->key == b->key; } /* Multicast group entry. */ struct ovn_multicast { struct hmap_node hmap_node; /* Index on 'datapath' and 'key'. */ struct ovn_datapath *datapath; const struct multicast_group *group; struct ovn_port **ports; size_t n_ports, allocated_ports; }; static uint32_t ovn_multicast_hash(const struct ovn_datapath *datapath, const struct multicast_group *group) { return hash_pointer(datapath, group->key); } static struct ovn_multicast * ovn_multicast_find(struct hmap *mcgroups, struct ovn_datapath *datapath, const struct multicast_group *group) { struct ovn_multicast *mc; HMAP_FOR_EACH_WITH_HASH (mc, hmap_node, ovn_multicast_hash(datapath, group), mcgroups) { if (mc->datapath == datapath && multicast_group_equal(mc->group, group)) { return mc; } } return NULL; } static void ovn_multicast_add(struct hmap *mcgroups, const struct multicast_group *group, struct ovn_port *port) { struct ovn_datapath *od = port->od; struct ovn_multicast *mc = ovn_multicast_find(mcgroups, od, group); if (!mc) { mc = xmalloc(sizeof *mc); hmap_insert(mcgroups, &mc->hmap_node, ovn_multicast_hash(od, group)); mc->datapath = od; mc->group = group; mc->n_ports = 0; mc->allocated_ports = 4; mc->ports = xmalloc(mc->allocated_ports * sizeof *mc->ports); } if (mc->n_ports >= mc->allocated_ports) { mc->ports = x2nrealloc(mc->ports, &mc->allocated_ports, sizeof *mc->ports); } mc->ports[mc->n_ports++] = port; } static void ovn_multicast_destroy(struct hmap *mcgroups, struct ovn_multicast *mc) { if (mc) { hmap_remove(mcgroups, &mc->hmap_node); free(mc->ports); free(mc); } } static void ovn_multicast_update_sbrec(const struct ovn_multicast *mc, const struct sbrec_multicast_group *sb) { struct sbrec_port_binding **ports = xmalloc(mc->n_ports * sizeof *ports); for (size_t i = 0; i < mc->n_ports; i++) { ports[i] = CONST_CAST(struct sbrec_port_binding *, mc->ports[i]->sb); } sbrec_multicast_group_set_ports(sb, ports, mc->n_ports); free(ports); } /* Logical flow generation. * * This code generates the Logical_Flow table in the southbound database, as a * function of most of the northbound database. */ struct ovn_lflow { struct hmap_node hmap_node; struct ovn_datapath *od; enum ovn_stage stage; uint16_t priority; char *match; char *actions; char *stage_hint; const char *where; }; static size_t ovn_lflow_hash(const struct ovn_lflow *lflow) { size_t hash = uuid_hash(&lflow->od->key); hash = hash_2words((lflow->stage << 16) | lflow->priority, hash); hash = hash_string(lflow->match, hash); return hash_string(lflow->actions, hash); } static bool ovn_lflow_equal(const struct ovn_lflow *a, const struct ovn_lflow *b) { return (a->od == b->od && a->stage == b->stage && a->priority == b->priority && !strcmp(a->match, b->match) && !strcmp(a->actions, b->actions)); } static void ovn_lflow_init(struct ovn_lflow *lflow, struct ovn_datapath *od, enum ovn_stage stage, uint16_t priority, char *match, char *actions, char *stage_hint, const char *where) { lflow->od = od; lflow->stage = stage; lflow->priority = priority; lflow->match = match; lflow->actions = actions; lflow->stage_hint = stage_hint; lflow->where = where; } /* Adds a row with the specified contents to the Logical_Flow table. */ static void ovn_lflow_add_at(struct hmap *lflow_map, struct ovn_datapath *od, enum ovn_stage stage, uint16_t priority, const char *match, const char *actions, const char *stage_hint, const char *where) { ovs_assert(ovn_stage_to_datapath_type(stage) == ovn_datapath_get_type(od)); struct ovn_lflow *lflow = xmalloc(sizeof *lflow); ovn_lflow_init(lflow, od, stage, priority, xstrdup(match), xstrdup(actions), nullable_xstrdup(stage_hint), where); hmap_insert(lflow_map, &lflow->hmap_node, ovn_lflow_hash(lflow)); } /* Adds a row with the specified contents to the Logical_Flow table. */ #define ovn_lflow_add_with_hint(LFLOW_MAP, OD, STAGE, PRIORITY, MATCH, \ ACTIONS, STAGE_HINT) \ ovn_lflow_add_at(LFLOW_MAP, OD, STAGE, PRIORITY, MATCH, ACTIONS, \ STAGE_HINT, OVS_SOURCE_LOCATOR) #define ovn_lflow_add(LFLOW_MAP, OD, STAGE, PRIORITY, MATCH, ACTIONS) \ ovn_lflow_add_with_hint(LFLOW_MAP, OD, STAGE, PRIORITY, MATCH, \ ACTIONS, NULL) static struct ovn_lflow * ovn_lflow_find(struct hmap *lflows, struct ovn_datapath *od, enum ovn_stage stage, uint16_t priority, const char *match, const char *actions) { struct ovn_lflow target; ovn_lflow_init(&target, od, stage, priority, CONST_CAST(char *, match), CONST_CAST(char *, actions), NULL, NULL); struct ovn_lflow *lflow; HMAP_FOR_EACH_WITH_HASH (lflow, hmap_node, ovn_lflow_hash(&target), lflows) { if (ovn_lflow_equal(lflow, &target)) { return lflow; } } return NULL; } static void ovn_lflow_destroy(struct hmap *lflows, struct ovn_lflow *lflow) { if (lflow) { hmap_remove(lflows, &lflow->hmap_node); free(lflow->match); free(lflow->actions); free(lflow->stage_hint); free(lflow); } } /* Appends port security constraints on L2 address field 'eth_addr_field' * (e.g. "eth.src" or "eth.dst") to 'match'. 'ps_addrs', with 'n_ps_addrs' * elements, is the collection of port_security constraints from an * OVN_NB Logical_Switch_Port row generated by extract_lsp_addresses(). */ static void build_port_security_l2(const char *eth_addr_field, struct lport_addresses *ps_addrs, unsigned int n_ps_addrs, struct ds *match) { if (!n_ps_addrs) { return; } ds_put_format(match, " && %s == {", eth_addr_field); for (size_t i = 0; i < n_ps_addrs; i++) { ds_put_format(match, "%s ", ps_addrs[i].ea_s); } ds_chomp(match, ' '); ds_put_cstr(match, "}"); } static void build_port_security_ipv6_nd_flow( struct ds *match, struct eth_addr ea, struct ipv6_netaddr *ipv6_addrs, int n_ipv6_addrs) { ds_put_format(match, " && ip6 && nd && ((nd.sll == "ETH_ADDR_FMT" || " "nd.sll == "ETH_ADDR_FMT") || ((nd.tll == "ETH_ADDR_FMT" || " "nd.tll == "ETH_ADDR_FMT")", ETH_ADDR_ARGS(eth_addr_zero), ETH_ADDR_ARGS(ea), ETH_ADDR_ARGS(eth_addr_zero), ETH_ADDR_ARGS(ea)); if (!n_ipv6_addrs) { ds_put_cstr(match, "))"); return; } char ip6_str[INET6_ADDRSTRLEN + 1]; struct in6_addr lla; in6_generate_lla(ea, &lla); memset(ip6_str, 0, sizeof(ip6_str)); ipv6_string_mapped(ip6_str, &lla); ds_put_format(match, " && (nd.target == %s", ip6_str); for(int i = 0; i < n_ipv6_addrs; i++) { memset(ip6_str, 0, sizeof(ip6_str)); ipv6_string_mapped(ip6_str, &ipv6_addrs[i].addr); ds_put_format(match, " || nd.target == %s", ip6_str); } ds_put_format(match, ")))"); } static void build_port_security_ipv6_flow( enum ovn_pipeline pipeline, struct ds *match, struct eth_addr ea, struct ipv6_netaddr *ipv6_addrs, int n_ipv6_addrs) { char ip6_str[INET6_ADDRSTRLEN + 1]; ds_put_format(match, " && %s == {", pipeline == P_IN ? "ip6.src" : "ip6.dst"); /* Allow link-local address. */ struct in6_addr lla; in6_generate_lla(ea, &lla); ipv6_string_mapped(ip6_str, &lla); ds_put_format(match, "%s, ", ip6_str); /* Allow ip6.dst=ff00::/8 for multicast packets */ if (pipeline == P_OUT) { ds_put_cstr(match, "ff00::/8, "); } for(int i = 0; i < n_ipv6_addrs; i++) { ipv6_string_mapped(ip6_str, &ipv6_addrs[i].addr); ds_put_format(match, "%s, ", ip6_str); } /* Replace ", " by "}". */ ds_chomp(match, ' '); ds_chomp(match, ','); ds_put_cstr(match, "}"); } /** * Build port security constraints on ARP and IPv6 ND fields * and add logical flows to S_SWITCH_IN_PORT_SEC_ND stage. * * For each port security of the logical port, following * logical flows are added * - If the port security has no IP (both IPv4 and IPv6) or * if it has IPv4 address(es) * - Priority 90 flow to allow ARP packets for known MAC addresses * in the eth.src and arp.spa fields. If the port security * has IPv4 addresses, allow known IPv4 addresses in the arp.tpa field. * * - If the port security has no IP (both IPv4 and IPv6) or * if it has IPv6 address(es) * - Priority 90 flow to allow IPv6 ND packets for known MAC addresses * in the eth.src and nd.sll/nd.tll fields. If the port security * has IPv6 addresses, allow known IPv6 addresses in the nd.target field * for IPv6 Neighbor Advertisement packet. * * - Priority 80 flow to drop ARP and IPv6 ND packets. */ static void build_port_security_nd(struct ovn_port *op, struct hmap *lflows) { struct ds match = DS_EMPTY_INITIALIZER; for (size_t i = 0; i < op->n_ps_addrs; i++) { struct lport_addresses *ps = &op->ps_addrs[i]; bool no_ip = !(ps->n_ipv4_addrs || ps->n_ipv6_addrs); ds_clear(&match); if (ps->n_ipv4_addrs || no_ip) { ds_put_format(&match, "inport == %s && eth.src == %s && arp.sha == %s", op->json_key, ps->ea_s, ps->ea_s); if (ps->n_ipv4_addrs) { ds_put_cstr(&match, " && arp.spa == {"); for (size_t j = 0; j < ps->n_ipv4_addrs; j++) { /* When the netmask is applied, if the host portion is * non-zero, the host can only use the specified * address in the arp.spa. If zero, the host is allowed * to use any address in the subnet. */ if (ps->ipv4_addrs[j].plen == 32 || ps->ipv4_addrs[j].addr & ~ps->ipv4_addrs[j].mask) { ds_put_cstr(&match, ps->ipv4_addrs[j].addr_s); } else { ds_put_format(&match, "%s/%d", ps->ipv4_addrs[j].network_s, ps->ipv4_addrs[j].plen); } ds_put_cstr(&match, ", "); } ds_chomp(&match, ' '); ds_chomp(&match, ','); ds_put_cstr(&match, "}"); } ovn_lflow_add(lflows, op->od, S_SWITCH_IN_PORT_SEC_ND, 90, ds_cstr(&match), "next;"); } if (ps->n_ipv6_addrs || no_ip) { ds_clear(&match); ds_put_format(&match, "inport == %s && eth.src == %s", op->json_key, ps->ea_s); build_port_security_ipv6_nd_flow(&match, ps->ea, ps->ipv6_addrs, ps->n_ipv6_addrs); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_PORT_SEC_ND, 90, ds_cstr(&match), "next;"); } } ds_clear(&match); ds_put_format(&match, "inport == %s && (arp || nd)", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_PORT_SEC_ND, 80, ds_cstr(&match), "drop;"); ds_destroy(&match); } /** * Build port security constraints on IPv4 and IPv6 src and dst fields * and add logical flows to S_SWITCH_(IN/OUT)_PORT_SEC_IP stage. * * For each port security of the logical port, following * logical flows are added * - If the port security has IPv4 addresses, * - Priority 90 flow to allow IPv4 packets for known IPv4 addresses * * - If the port security has IPv6 addresses, * - Priority 90 flow to allow IPv6 packets for known IPv6 addresses * * - If the port security has IPv4 addresses or IPv6 addresses or both * - Priority 80 flow to drop all IPv4 and IPv6 traffic */ static void build_port_security_ip(enum ovn_pipeline pipeline, struct ovn_port *op, struct hmap *lflows) { char *port_direction; enum ovn_stage stage; if (pipeline == P_IN) { port_direction = "inport"; stage = S_SWITCH_IN_PORT_SEC_IP; } else { port_direction = "outport"; stage = S_SWITCH_OUT_PORT_SEC_IP; } for (size_t i = 0; i < op->n_ps_addrs; i++) { struct lport_addresses *ps = &op->ps_addrs[i]; if (!(ps->n_ipv4_addrs || ps->n_ipv6_addrs)) { continue; } if (ps->n_ipv4_addrs) { struct ds match = DS_EMPTY_INITIALIZER; if (pipeline == P_IN) { /* Permit use of the unspecified address for DHCP discovery */ struct ds dhcp_match = DS_EMPTY_INITIALIZER; ds_put_format(&dhcp_match, "inport == %s" " && eth.src == %s" " && ip4.src == 0.0.0.0" " && ip4.dst == 255.255.255.255" " && udp.src == 68 && udp.dst == 67", op->json_key, ps->ea_s); ovn_lflow_add(lflows, op->od, stage, 90, ds_cstr(&dhcp_match), "next;"); ds_destroy(&dhcp_match); ds_put_format(&match, "inport == %s && eth.src == %s" " && ip4.src == {", op->json_key, ps->ea_s); } else { ds_put_format(&match, "outport == %s && eth.dst == %s" " && ip4.dst == {255.255.255.255, 224.0.0.0/4, ", op->json_key, ps->ea_s); } for (int j = 0; j < ps->n_ipv4_addrs; j++) { ovs_be32 mask = ps->ipv4_addrs[j].mask; /* When the netmask is applied, if the host portion is * non-zero, the host can only use the specified * address. If zero, the host is allowed to use any * address in the subnet. */ if (ps->ipv4_addrs[j].plen == 32 || ps->ipv4_addrs[j].addr & ~mask) { ds_put_format(&match, "%s", ps->ipv4_addrs[j].addr_s); if (pipeline == P_OUT && ps->ipv4_addrs[j].plen != 32) { /* Host is also allowed to receive packets to the * broadcast address in the specified subnet. */ ds_put_format(&match, ", %s", ps->ipv4_addrs[j].bcast_s); } } else { /* host portion is zero */ ds_put_format(&match, "%s/%d", ps->ipv4_addrs[j].network_s, ps->ipv4_addrs[j].plen); } ds_put_cstr(&match, ", "); } /* Replace ", " by "}". */ ds_chomp(&match, ' '); ds_chomp(&match, ','); ds_put_cstr(&match, "}"); ovn_lflow_add(lflows, op->od, stage, 90, ds_cstr(&match), "next;"); ds_destroy(&match); } if (ps->n_ipv6_addrs) { struct ds match = DS_EMPTY_INITIALIZER; if (pipeline == P_IN) { /* Permit use of unspecified address for duplicate address * detection */ struct ds dad_match = DS_EMPTY_INITIALIZER; ds_put_format(&dad_match, "inport == %s" " && eth.src == %s" " && ip6.src == ::" " && ip6.dst == ff02::/16" " && icmp6.type == {131, 135, 143}", op->json_key, ps->ea_s); ovn_lflow_add(lflows, op->od, stage, 90, ds_cstr(&dad_match), "next;"); ds_destroy(&dad_match); } ds_put_format(&match, "%s == %s && %s == %s", port_direction, op->json_key, pipeline == P_IN ? "eth.src" : "eth.dst", ps->ea_s); build_port_security_ipv6_flow(pipeline, &match, ps->ea, ps->ipv6_addrs, ps->n_ipv6_addrs); ovn_lflow_add(lflows, op->od, stage, 90, ds_cstr(&match), "next;"); ds_destroy(&match); } char *match = xasprintf("%s == %s && %s == %s && ip", port_direction, op->json_key, pipeline == P_IN ? "eth.src" : "eth.dst", ps->ea_s); ovn_lflow_add(lflows, op->od, stage, 80, match, "drop;"); free(match); } } static bool lsp_is_enabled(const struct nbrec_logical_switch_port *lsp) { return !lsp->enabled || *lsp->enabled; } static bool lsp_is_up(const struct nbrec_logical_switch_port *lsp) { return !lsp->up || *lsp->up; } static bool build_dhcpv4_action(struct ovn_port *op, ovs_be32 offer_ip, struct ds *options_action, struct ds *response_action, struct ds *ipv4_addr_match) { if (!op->nbsp->dhcpv4_options) { /* CMS has disabled native DHCPv4 for this lport. */ return false; } ovs_be32 host_ip, mask; char *error = ip_parse_masked(op->nbsp->dhcpv4_options->cidr, &host_ip, &mask); if (error || ((offer_ip ^ host_ip) & mask)) { /* Either * - cidr defined is invalid or * - the offer ip of the logical port doesn't belong to the cidr * defined in the DHCPv4 options. * */ free(error); return false; } const char *server_ip = smap_get( &op->nbsp->dhcpv4_options->options, "server_id"); const char *server_mac = smap_get( &op->nbsp->dhcpv4_options->options, "server_mac"); const char *lease_time = smap_get( &op->nbsp->dhcpv4_options->options, "lease_time"); if (!(server_ip && server_mac && lease_time)) { /* "server_id", "server_mac" and "lease_time" should be * present in the dhcp_options. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "Required DHCPv4 options not defined for lport - %s", op->json_key); return false; } struct smap dhcpv4_options = SMAP_INITIALIZER(&dhcpv4_options); smap_clone(&dhcpv4_options, &op->nbsp->dhcpv4_options->options); /* server_mac is not DHCPv4 option, delete it from the smap. */ smap_remove(&dhcpv4_options, "server_mac"); char *netmask = xasprintf(IP_FMT, IP_ARGS(mask)); smap_add(&dhcpv4_options, "netmask", netmask); free(netmask); ds_put_format(options_action, REGBIT_DHCP_OPTS_RESULT" = put_dhcp_opts(offerip = " IP_FMT", ", IP_ARGS(offer_ip)); /* We're not using SMAP_FOR_EACH because we want a consistent order of the * options on different architectures (big or little endian, SSE4.2) */ const struct smap_node **sorted_opts = smap_sort(&dhcpv4_options); for (size_t i = 0; i < smap_count(&dhcpv4_options); i++) { const struct smap_node *node = sorted_opts[i]; ds_put_format(options_action, "%s = %s, ", node->key, node->value); } free(sorted_opts); ds_chomp(options_action, ' '); ds_chomp(options_action, ','); ds_put_cstr(options_action, "); next;"); ds_put_format(response_action, "eth.dst = eth.src; eth.src = %s; " "ip4.dst = "IP_FMT"; ip4.src = %s; udp.src = 67; " "udp.dst = 68; outport = inport; flags.loopback = 1; " "output;", server_mac, IP_ARGS(offer_ip), server_ip); ds_put_format(ipv4_addr_match, "ip4.src == "IP_FMT" && ip4.dst == {%s, 255.255.255.255}", IP_ARGS(offer_ip), server_ip); smap_destroy(&dhcpv4_options); return true; } static bool build_dhcpv6_action(struct ovn_port *op, struct in6_addr *offer_ip, struct ds *options_action, struct ds *response_action) { if (!op->nbsp->dhcpv6_options) { /* CMS has disabled native DHCPv6 for this lport. */ return false; } struct in6_addr host_ip, mask; char *error = ipv6_parse_masked(op->nbsp->dhcpv6_options->cidr, &host_ip, &mask); if (error) { free(error); return false; } struct in6_addr ip6_mask = ipv6_addr_bitxor(offer_ip, &host_ip); ip6_mask = ipv6_addr_bitand(&ip6_mask, &mask); if (!ipv6_mask_is_any(&ip6_mask)) { /* offer_ip doesn't belongs to the cidr defined in lport's DHCPv6 * options.*/ return false; } const struct smap *options_map = &op->nbsp->dhcpv6_options->options; /* "server_id" should be the MAC address. */ const char *server_mac = smap_get(options_map, "server_id"); struct eth_addr ea; if (!server_mac || !eth_addr_from_string(server_mac, &ea)) { /* "server_id" should be present in the dhcpv6_options. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "server_id not present in the DHCPv6 options" " for lport %s", op->json_key); return false; } /* Get the link local IP of the DHCPv6 server from the server MAC. */ struct in6_addr lla; in6_generate_lla(ea, &lla); char server_ip[INET6_ADDRSTRLEN + 1]; ipv6_string_mapped(server_ip, &lla); char ia_addr[INET6_ADDRSTRLEN + 1]; ipv6_string_mapped(ia_addr, offer_ip); ds_put_format(options_action, REGBIT_DHCP_OPTS_RESULT" = put_dhcpv6_opts("); /* Check whether the dhcpv6 options should be configured as stateful. * Only reply with ia_addr option for dhcpv6 stateful address mode. */ if (!smap_get_bool(options_map, "dhcpv6_stateless", false)) { ipv6_string_mapped(ia_addr, offer_ip); ds_put_format(options_action, "ia_addr = %s, ", ia_addr); } /* We're not using SMAP_FOR_EACH because we want a consistent order of the * options on different architectures (big or little endian, SSE4.2) */ const struct smap_node **sorted_opts = smap_sort(options_map); for (size_t i = 0; i < smap_count(options_map); i++) { const struct smap_node *node = sorted_opts[i]; if (strcmp(node->key, "dhcpv6_stateless")) { ds_put_format(options_action, "%s = %s, ", node->key, node->value); } } free(sorted_opts); ds_chomp(options_action, ' '); ds_chomp(options_action, ','); ds_put_cstr(options_action, "); next;"); ds_put_format(response_action, "eth.dst = eth.src; eth.src = %s; " "ip6.dst = ip6.src; ip6.src = %s; udp.src = 547; " "udp.dst = 546; outport = inport; flags.loopback = 1; " "output;", server_mac, server_ip); return true; } static bool has_stateful_acl(struct ovn_datapath *od) { for (size_t i = 0; i < od->nbs->n_acls; i++) { struct nbrec_acl *acl = od->nbs->acls[i]; if (!strcmp(acl->action, "allow-related")) { return true; } } return false; } static void build_pre_acls(struct ovn_datapath *od, struct hmap *lflows) { bool has_stateful = has_stateful_acl(od); /* Ingress and Egress Pre-ACL Table (Priority 0): Packets are * allowed by default. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_ACL, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_ACL, 0, "1", "next;"); /* If there are any stateful ACL rules in this datapath, we must * send all IP packets through the conntrack action, which handles * defragmentation, in order to match L4 headers. */ if (has_stateful) { for (size_t i = 0; i < od->n_router_ports; i++) { struct ovn_port *op = od->router_ports[i]; /* Can't use ct() for router ports. Consider the * following configuration: lp1(10.0.0.2) on * hostA--ls1--lr0--ls2--lp2(10.0.1.2) on hostB, For a * ping from lp1 to lp2, First, the response will go * through ct() with a zone for lp2 in the ls2 ingress * pipeline on hostB. That ct zone knows about this * connection. Next, it goes through ct() with the zone * for the router port in the egress pipeline of ls2 on * hostB. This zone does not know about the connection, * as the icmp request went through the logical router * on hostA, not hostB. This would only work with * distributed conntrack state across all chassis. */ struct ds match_in = DS_EMPTY_INITIALIZER; struct ds match_out = DS_EMPTY_INITIALIZER; ds_put_format(&match_in, "ip && inport == %s", op->json_key); ds_put_format(&match_out, "ip && outport == %s", op->json_key); ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_ACL, 110, ds_cstr(&match_in), "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_ACL, 110, ds_cstr(&match_out), "next;"); ds_destroy(&match_in); ds_destroy(&match_out); } if (od->localnet_port) { struct ds match_in = DS_EMPTY_INITIALIZER; struct ds match_out = DS_EMPTY_INITIALIZER; ds_put_format(&match_in, "ip && inport == %s", od->localnet_port->json_key); ds_put_format(&match_out, "ip && outport == %s", od->localnet_port->json_key); ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_ACL, 110, ds_cstr(&match_in), "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_ACL, 110, ds_cstr(&match_out), "next;"); ds_destroy(&match_in); ds_destroy(&match_out); } /* Ingress and Egress Pre-ACL Table (Priority 110). * * Not to do conntrack on ND packets. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_ACL, 110, "nd", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_ACL, 110, "(nd_rs || nd_ra)", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_ACL, 110, "nd", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_ACL, 110, "(nd_rs || nd_ra)", "next;"); /* Ingress and Egress Pre-ACL Table (Priority 100). * * Regardless of whether the ACL is "from-lport" or "to-lport", * we need rules in both the ingress and egress table, because * the return traffic needs to be followed. * * 'REGBIT_CONNTRACK_DEFRAG' is set to let the pre-stateful table send * it to conntrack for tracking and defragmentation. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_ACL, 100, "ip", REGBIT_CONNTRACK_DEFRAG" = 1; next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_ACL, 100, "ip", REGBIT_CONNTRACK_DEFRAG" = 1; next;"); } } /* For a 'key' of the form "IP:port" or just "IP", sets 'port' and * 'ip_address'. The caller must free() the memory allocated for * 'ip_address'. */ static void ip_address_and_port_from_lb_key(const char *key, char **ip_address, uint16_t *port, int *addr_family) { struct sockaddr_storage ss; char ip_addr_buf[INET6_ADDRSTRLEN]; char *error; error = ipv46_parse(key, PORT_OPTIONAL, &ss); if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ip address or port for load balancer key %s", key); free(error); return; } if (ss.ss_family == AF_INET) { struct sockaddr_in *sin = ALIGNED_CAST(struct sockaddr_in *, &ss); *port = sin->sin_port == 0 ? 0 : ntohs(sin->sin_port); inet_ntop(AF_INET, &sin->sin_addr, ip_addr_buf, sizeof ip_addr_buf); } else { struct sockaddr_in6 *sin6 = ALIGNED_CAST(struct sockaddr_in6 *, &ss); *port = sin6->sin6_port == 0 ? 0 : ntohs(sin6->sin6_port); inet_ntop(AF_INET6, &sin6->sin6_addr, ip_addr_buf, sizeof ip_addr_buf); } *ip_address = xstrdup(ip_addr_buf); *addr_family = ss.ss_family; } /* * Returns true if logical switch is configured with DNS records, false * otherwise. */ static bool ls_has_dns_records(const struct nbrec_logical_switch *nbs) { for (size_t i = 0; i < nbs->n_dns_records; i++) { if (!smap_is_empty(&nbs->dns_records[i]->records)) { return true; } } return false; } static void build_pre_lb(struct ovn_datapath *od, struct hmap *lflows) { /* Allow all packets to go to next tables by default. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_LB, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_LB, 0, "1", "next;"); struct sset all_ips = SSET_INITIALIZER(&all_ips); bool vip_configured = false; int addr_family = AF_INET; for (int i = 0; i < od->nbs->n_load_balancer; i++) { struct nbrec_load_balancer *lb = od->nbs->load_balancer[i]; struct smap *vips = &lb->vips; struct smap_node *node; SMAP_FOR_EACH (node, vips) { vip_configured = true; /* node->key contains IP:port or just IP. */ char *ip_address = NULL; uint16_t port; ip_address_and_port_from_lb_key(node->key, &ip_address, &port, &addr_family); if (!ip_address) { continue; } if (!sset_contains(&all_ips, ip_address)) { sset_add(&all_ips, ip_address); } free(ip_address); /* Ignore L4 port information in the key because fragmented packets * may not have L4 information. The pre-stateful table will send * the packet through ct() action to de-fragment. In stateful * table, we will eventually look at L4 information. */ } } /* 'REGBIT_CONNTRACK_DEFRAG' is set to let the pre-stateful table send * packet to conntrack for defragmentation. */ const char *ip_address; SSET_FOR_EACH(ip_address, &all_ips) { char *match; if (addr_family == AF_INET) { match = xasprintf("ip && ip4.dst == %s", ip_address); } else { match = xasprintf("ip && ip6.dst == %s", ip_address); } ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_LB, 100, match, REGBIT_CONNTRACK_DEFRAG" = 1; next;"); free(match); } sset_destroy(&all_ips); if (vip_configured) { ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_LB, 100, "ip", REGBIT_CONNTRACK_DEFRAG" = 1; next;"); } } static void build_pre_stateful(struct ovn_datapath *od, struct hmap *lflows) { /* Ingress and Egress pre-stateful Table (Priority 0): Packets are * allowed by default. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_STATEFUL, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_STATEFUL, 0, "1", "next;"); /* If REGBIT_CONNTRACK_DEFRAG is set as 1, then the packets should be * sent to conntrack for tracking and defragmentation. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PRE_STATEFUL, 100, REGBIT_CONNTRACK_DEFRAG" == 1", "ct_next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PRE_STATEFUL, 100, REGBIT_CONNTRACK_DEFRAG" == 1", "ct_next;"); } static void build_acl_log(struct ds *actions, const struct nbrec_acl *acl) { if (!acl->log) { return; } ds_put_cstr(actions, "log("); if (acl->name) { ds_put_format(actions, "name=\"%s\", ", acl->name); } /* If a severity level isn't specified, default to "info". */ if (acl->severity) { ds_put_format(actions, "severity=%s, ", acl->severity); } else { ds_put_format(actions, "severity=info, "); } if (!strcmp(acl->action, "drop")) { ds_put_cstr(actions, "verdict=drop, "); } else if (!strcmp(acl->action, "reject")) { ds_put_cstr(actions, "verdict=reject, "); } else if (!strcmp(acl->action, "allow") || !strcmp(acl->action, "allow-related")) { ds_put_cstr(actions, "verdict=allow, "); } ds_chomp(actions, ' '); ds_chomp(actions, ','); ds_put_cstr(actions, "); "); } static void build_acls(struct ovn_datapath *od, struct hmap *lflows) { bool has_stateful = has_stateful_acl(od); /* Ingress and Egress ACL Table (Priority 0): Packets are allowed by * default. A related rule at priority 1 is added below if there * are any stateful ACLs in this datapath. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_ACL, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_ACL, 0, "1", "next;"); if (has_stateful) { /* Ingress and Egress ACL Table (Priority 1). * * By default, traffic is allowed. This is partially handled by * the Priority 0 ACL flows added earlier, but we also need to * commit IP flows. This is because, while the initiater's * direction may not have any stateful rules, the server's may * and then its return traffic would not have an associated * conntrack entry and would return "+invalid". * * We use "ct_commit" for a connection that is not already known * by the connection tracker. Once a connection is committed, * subsequent packets will hit the flow at priority 0 that just * uses "next;" * * We also check for established connections that have ct_label.blocked * set on them. That's a connection that was disallowed, but is * now allowed by policy again since it hit this default-allow flow. * We need to set ct_label.blocked=0 to let the connection continue, * which will be done by ct_commit() in the "stateful" stage. * Subsequent packets will hit the flow at priority 0 that just * uses "next;". */ ovn_lflow_add(lflows, od, S_SWITCH_IN_ACL, 1, "ip && (!ct.est || (ct.est && ct_label.blocked == 1))", REGBIT_CONNTRACK_COMMIT" = 1; next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_ACL, 1, "ip && (!ct.est || (ct.est && ct_label.blocked == 1))", REGBIT_CONNTRACK_COMMIT" = 1; next;"); /* Ingress and Egress ACL Table (Priority 65535). * * Always drop traffic that's in an invalid state. Also drop * reply direction packets for connections that have been marked * for deletion (bit 0 of ct_label is set). * * This is enforced at a higher priority than ACLs can be defined. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_ACL, UINT16_MAX, "ct.inv || (ct.est && ct.rpl && ct_label.blocked == 1)", "drop;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_ACL, UINT16_MAX, "ct.inv || (ct.est && ct.rpl && ct_label.blocked == 1)", "drop;"); /* Ingress and Egress ACL Table (Priority 65535). * * Allow reply traffic that is part of an established * conntrack entry that has not been marked for deletion * (bit 0 of ct_label). We only match traffic in the * reply direction because we want traffic in the request * direction to hit the currently defined policy from ACLs. * * This is enforced at a higher priority than ACLs can be defined. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_ACL, UINT16_MAX, "ct.est && !ct.rel && !ct.new && !ct.inv " "&& ct.rpl && ct_label.blocked == 0", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_ACL, UINT16_MAX, "ct.est && !ct.rel && !ct.new && !ct.inv " "&& ct.rpl && ct_label.blocked == 0", "next;"); /* Ingress and Egress ACL Table (Priority 65535). * * Allow traffic that is related to an existing conntrack entry that * has not been marked for deletion (bit 0 of ct_label). * * This is enforced at a higher priority than ACLs can be defined. * * NOTE: This does not support related data sessions (eg, * a dynamically negotiated FTP data channel), but will allow * related traffic such as an ICMP Port Unreachable through * that's generated from a non-listening UDP port. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_ACL, UINT16_MAX, "!ct.est && ct.rel && !ct.new && !ct.inv " "&& ct_label.blocked == 0", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_ACL, UINT16_MAX, "!ct.est && ct.rel && !ct.new && !ct.inv " "&& ct_label.blocked == 0", "next;"); /* Ingress and Egress ACL Table (Priority 65535). * * Not to do conntrack on ND packets. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_ACL, UINT16_MAX, "nd", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_ACL, UINT16_MAX, "nd", "next;"); } /* Ingress or Egress ACL Table (Various priorities). */ for (size_t i = 0; i < od->nbs->n_acls; i++) { struct nbrec_acl *acl = od->nbs->acls[i]; bool ingress = !strcmp(acl->direction, "from-lport") ? true :false; enum ovn_stage stage = ingress ? S_SWITCH_IN_ACL : S_SWITCH_OUT_ACL; char *stage_hint = xasprintf("%08x", acl->header_.uuid.parts[0]); if (!strcmp(acl->action, "allow") || !strcmp(acl->action, "allow-related")) { /* If there are any stateful flows, we must even commit "allow" * actions. This is because, while the initiater's * direction may not have any stateful rules, the server's * may and then its return traffic would not have an * associated conntrack entry and would return "+invalid". */ if (!has_stateful) { struct ds actions = DS_EMPTY_INITIALIZER; build_acl_log(&actions, acl); ds_put_cstr(&actions, "next;"); ovn_lflow_add_with_hint(lflows, od, stage, acl->priority + OVN_ACL_PRI_OFFSET, acl->match, ds_cstr(&actions), stage_hint); ds_destroy(&actions); } else { struct ds match = DS_EMPTY_INITIALIZER; struct ds actions = DS_EMPTY_INITIALIZER; /* Commit the connection tracking entry if it's a new * connection that matches this ACL. After this commit, * the reply traffic is allowed by a flow we create at * priority 65535, defined earlier. * * It's also possible that a known connection was marked for * deletion after a policy was deleted, but the policy was * re-added while that connection is still known. We catch * that case here and un-set ct_label.blocked (which will be done * by ct_commit in the "stateful" stage) to indicate that the * connection should be allowed to resume. */ ds_put_format(&match, "((ct.new && !ct.est)" " || (!ct.new && ct.est && !ct.rpl " "&& ct_label.blocked == 1)) " "&& (%s)", acl->match); ds_put_cstr(&actions, REGBIT_CONNTRACK_COMMIT" = 1; "); build_acl_log(&actions, acl); ds_put_cstr(&actions, "next;"); ovn_lflow_add_with_hint(lflows, od, stage, acl->priority + OVN_ACL_PRI_OFFSET, ds_cstr(&match), ds_cstr(&actions), stage_hint); /* Match on traffic in the request direction for an established * connection tracking entry that has not been marked for * deletion. There is no need to commit here, so we can just * proceed to the next table. We use this to ensure that this * connection is still allowed by the currently defined * policy. */ ds_clear(&match); ds_clear(&actions); ds_put_format(&match, "!ct.new && ct.est && !ct.rpl" " && ct_label.blocked == 0 && (%s)", acl->match); build_acl_log(&actions, acl); ds_put_cstr(&actions, "next;"); ovn_lflow_add_with_hint(lflows, od, stage, acl->priority + OVN_ACL_PRI_OFFSET, ds_cstr(&match), ds_cstr(&actions), stage_hint); ds_destroy(&match); ds_destroy(&actions); } } else if (!strcmp(acl->action, "drop") || !strcmp(acl->action, "reject")) { struct ds match = DS_EMPTY_INITIALIZER; struct ds actions = DS_EMPTY_INITIALIZER; /* XXX Need to support "reject", treat it as "drop;" for now. */ if (!strcmp(acl->action, "reject")) { VLOG_INFO("reject is not a supported action"); } /* The implementation of "drop" differs if stateful ACLs are in * use for this datapath. In that case, the actions differ * depending on whether the connection was previously committed * to the connection tracker with ct_commit. */ if (has_stateful) { /* If the packet is not part of an established connection, then * we can simply drop it. */ ds_put_format(&match, "(!ct.est || (ct.est && ct_label.blocked == 1)) " "&& (%s)", acl->match); ds_clear(&actions); build_acl_log(&actions, acl); ds_put_cstr(&actions, "/* drop */"); ovn_lflow_add_with_hint(lflows, od, stage, acl->priority + OVN_ACL_PRI_OFFSET, ds_cstr(&match), ds_cstr(&actions), stage_hint); /* For an existing connection without ct_label set, we've * encountered a policy change. ACLs previously allowed * this connection and we committed the connection tracking * entry. Current policy says that we should drop this * connection. First, we set bit 0 of ct_label to indicate * that this connection is set for deletion. By not * specifying "next;", we implicitly drop the packet after * updating conntrack state. We would normally defer * ct_commit() to the "stateful" stage, but since we're * dropping the packet, we go ahead and do it here. */ ds_clear(&match); ds_clear(&actions); ds_put_format(&match, "ct.est && ct_label.blocked == 0 && (%s)", acl->match); ds_put_cstr(&actions, "ct_commit(ct_label=1/1); "); build_acl_log(&actions, acl); ds_put_cstr(&actions, "/* drop */"); ovn_lflow_add_with_hint(lflows, od, stage, acl->priority + OVN_ACL_PRI_OFFSET, ds_cstr(&match), ds_cstr(&actions), stage_hint); } else { /* There are no stateful ACLs in use on this datapath, * so a "drop" ACL is simply the "drop" logical flow action * in all cases. */ ds_clear(&actions); build_acl_log(&actions, acl); ds_put_cstr(&actions, "/* drop */"); ovn_lflow_add_with_hint(lflows, od, stage, acl->priority + OVN_ACL_PRI_OFFSET, acl->match, ds_cstr(&actions), stage_hint); } ds_destroy(&match); ds_destroy(&actions); } free(stage_hint); } /* Add 34000 priority flow to allow DHCP reply from ovn-controller to all * logical ports of the datapath if the CMS has configured DHCPv4 options. * */ for (size_t i = 0; i < od->nbs->n_ports; i++) { if (od->nbs->ports[i]->dhcpv4_options) { const char *server_id = smap_get( &od->nbs->ports[i]->dhcpv4_options->options, "server_id"); const char *server_mac = smap_get( &od->nbs->ports[i]->dhcpv4_options->options, "server_mac"); const char *lease_time = smap_get( &od->nbs->ports[i]->dhcpv4_options->options, "lease_time"); if (server_id && server_mac && lease_time) { struct ds match = DS_EMPTY_INITIALIZER; const char *actions = has_stateful ? "ct_commit; next;" : "next;"; ds_put_format(&match, "outport == \"%s\" && eth.src == %s " "&& ip4.src == %s && udp && udp.src == 67 " "&& udp.dst == 68", od->nbs->ports[i]->name, server_mac, server_id); ovn_lflow_add( lflows, od, S_SWITCH_OUT_ACL, 34000, ds_cstr(&match), actions); ds_destroy(&match); } } if (od->nbs->ports[i]->dhcpv6_options) { const char *server_mac = smap_get( &od->nbs->ports[i]->dhcpv6_options->options, "server_id"); struct eth_addr ea; if (server_mac && eth_addr_from_string(server_mac, &ea)) { /* Get the link local IP of the DHCPv6 server from the * server MAC. */ struct in6_addr lla; in6_generate_lla(ea, &lla); char server_ip[INET6_ADDRSTRLEN + 1]; ipv6_string_mapped(server_ip, &lla); struct ds match = DS_EMPTY_INITIALIZER; const char *actions = has_stateful ? "ct_commit; next;" : "next;"; ds_put_format(&match, "outport == \"%s\" && eth.src == %s " "&& ip6.src == %s && udp && udp.src == 547 " "&& udp.dst == 546", od->nbs->ports[i]->name, server_mac, server_ip); ovn_lflow_add( lflows, od, S_SWITCH_OUT_ACL, 34000, ds_cstr(&match), actions); ds_destroy(&match); } } } /* Add a 34000 priority flow to advance the DNS reply from ovn-controller, * if the CMS has configured DNS records for the datapath. */ if (ls_has_dns_records(od->nbs)) { const char *actions = has_stateful ? "ct_commit; next;" : "next;"; ovn_lflow_add( lflows, od, S_SWITCH_OUT_ACL, 34000, "udp.src == 53", actions); } } static void build_qos(struct ovn_datapath *od, struct hmap *lflows) { ovn_lflow_add(lflows, od, S_SWITCH_IN_QOS_MARK, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_QOS_MARK, 0, "1", "next;"); for (size_t i = 0; i < od->nbs->n_qos_rules; i++) { struct nbrec_qos *qos = od->nbs->qos_rules[i]; bool ingress = !strcmp(qos->direction, "from-lport") ? true :false; enum ovn_stage stage = ingress ? S_SWITCH_IN_QOS_MARK : S_SWITCH_OUT_QOS_MARK; if (!strcmp(qos->key_action, "dscp")) { struct ds dscp_action = DS_EMPTY_INITIALIZER; ds_put_format(&dscp_action, "ip.dscp = %d; next;", (uint8_t)qos->value_action); ovn_lflow_add(lflows, od, stage, qos->priority, qos->match, ds_cstr(&dscp_action)); ds_destroy(&dscp_action); } } } static void build_lb(struct ovn_datapath *od, struct hmap *lflows) { /* Ingress and Egress LB Table (Priority 0): Packets are allowed by * default. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_LB, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_LB, 0, "1", "next;"); if (od->nbs->load_balancer) { /* Ingress and Egress LB Table (Priority 65535). * * Send established traffic through conntrack for just NAT. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_LB, UINT16_MAX, "ct.est && !ct.rel && !ct.new && !ct.inv", REGBIT_CONNTRACK_NAT" = 1; next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_LB, UINT16_MAX, "ct.est && !ct.rel && !ct.new && !ct.inv", REGBIT_CONNTRACK_NAT" = 1; next;"); } } static void build_stateful(struct ovn_datapath *od, struct hmap *lflows) { /* Ingress and Egress stateful Table (Priority 0): Packets are * allowed by default. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_STATEFUL, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_STATEFUL, 0, "1", "next;"); /* If REGBIT_CONNTRACK_COMMIT is set as 1, then the packets should be * committed to conntrack. We always set ct_label.blocked to 0 here as * any packet that makes it this far is part of a connection we * want to allow to continue. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_STATEFUL, 100, REGBIT_CONNTRACK_COMMIT" == 1", "ct_commit(ct_label=0/1); next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_STATEFUL, 100, REGBIT_CONNTRACK_COMMIT" == 1", "ct_commit(ct_label=0/1); next;"); /* If REGBIT_CONNTRACK_NAT is set as 1, then packets should just be sent * through nat (without committing). * * REGBIT_CONNTRACK_COMMIT is set for new connections and * REGBIT_CONNTRACK_NAT is set for established connections. So they * don't overlap. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_STATEFUL, 100, REGBIT_CONNTRACK_NAT" == 1", "ct_lb;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_STATEFUL, 100, REGBIT_CONNTRACK_NAT" == 1", "ct_lb;"); /* Load balancing rules for new connections get committed to conntrack * table. So even if REGBIT_CONNTRACK_COMMIT is set in a previous table * a higher priority rule for load balancing below also commits the * connection, so it is okay if we do not hit the above match on * REGBIT_CONNTRACK_COMMIT. */ for (int i = 0; i < od->nbs->n_load_balancer; i++) { struct nbrec_load_balancer *lb = od->nbs->load_balancer[i]; struct smap *vips = &lb->vips; struct smap_node *node; SMAP_FOR_EACH (node, vips) { uint16_t port = 0; int addr_family; /* node->key contains IP:port or just IP. */ char *ip_address = NULL; ip_address_and_port_from_lb_key(node->key, &ip_address, &port, &addr_family); if (!ip_address) { continue; } /* New connections in Ingress table. */ char *action = xasprintf("ct_lb(%s);", node->value); struct ds match = DS_EMPTY_INITIALIZER; if (addr_family == AF_INET) { ds_put_format(&match, "ct.new && ip4.dst == %s", ip_address); } else { ds_put_format(&match, "ct.new && ip6.dst == %s", ip_address); } if (port) { if (lb->protocol && !strcmp(lb->protocol, "udp")) { ds_put_format(&match, " && udp.dst == %d", port); } else { ds_put_format(&match, " && tcp.dst == %d", port); } ovn_lflow_add(lflows, od, S_SWITCH_IN_STATEFUL, 120, ds_cstr(&match), action); } else { ovn_lflow_add(lflows, od, S_SWITCH_IN_STATEFUL, 110, ds_cstr(&match), action); } free(ip_address); ds_destroy(&match); free(action); } } } static void build_lswitch_flows(struct hmap *datapaths, struct hmap *ports, struct hmap *lflows, struct hmap *mcgroups) { /* This flow table structure is documented in ovn-northd(8), so please * update ovn-northd.8.xml if you change anything. */ struct ds match = DS_EMPTY_INITIALIZER; struct ds actions = DS_EMPTY_INITIALIZER; /* Build pre-ACL and ACL tables for both ingress and egress. * Ingress tables 3 through 9. Egress tables 0 through 6. */ struct ovn_datapath *od; HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } build_pre_acls(od, lflows); build_pre_lb(od, lflows); build_pre_stateful(od, lflows); build_acls(od, lflows); build_qos(od, lflows); build_lb(od, lflows); build_stateful(od, lflows); } /* Logical switch ingress table 0: Admission control framework (priority * 100). */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } /* Logical VLANs not supported. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PORT_SEC_L2, 100, "vlan.present", "drop;"); /* Broadcast/multicast source address is invalid. */ ovn_lflow_add(lflows, od, S_SWITCH_IN_PORT_SEC_L2, 100, "eth.src[40]", "drop;"); /* Port security flows have priority 50 (see below) and will continue * to the next table if packet source is acceptable. */ } /* Logical switch ingress table 0: Ingress port security - L2 * (priority 50). * Ingress table 1: Ingress port security - IP (priority 90 and 80) * Ingress table 2: Ingress port security - ND (priority 90 and 80) */ struct ovn_port *op; HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } if (!lsp_is_enabled(op->nbsp)) { /* Drop packets from disabled logical ports (since logical flow * tables are default-drop). */ continue; } ds_clear(&match); ds_clear(&actions); ds_put_format(&match, "inport == %s", op->json_key); build_port_security_l2("eth.src", op->ps_addrs, op->n_ps_addrs, &match); const char *queue_id = smap_get(&op->sb->options, "qdisc_queue_id"); if (queue_id) { ds_put_format(&actions, "set_queue(%s); ", queue_id); } ds_put_cstr(&actions, "next;"); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_PORT_SEC_L2, 50, ds_cstr(&match), ds_cstr(&actions)); if (op->nbsp->n_port_security) { build_port_security_ip(P_IN, op, lflows); build_port_security_nd(op, lflows); } } /* Ingress table 1 and 2: Port security - IP and ND, by default goto next. * (priority 0)*/ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } ovn_lflow_add(lflows, od, S_SWITCH_IN_PORT_SEC_ND, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_PORT_SEC_IP, 0, "1", "next;"); } /* Ingress table 10: ARP/ND responder, skip requests coming from localnet * and vtep ports. (priority 100); see ovn-northd.8.xml for the * rationale. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } if ((!strcmp(op->nbsp->type, "localnet")) || (!strcmp(op->nbsp->type, "vtep"))) { ds_clear(&match); ds_put_format(&match, "inport == %s", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_ARP_ND_RSP, 100, ds_cstr(&match), "next;"); } } /* Ingress table 10: ARP/ND responder, reply for known IPs. * (priority 50). */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } /* * Add ARP/ND reply flows if either the * - port is up or * - port type is router or * - port type is localport */ if (!lsp_is_up(op->nbsp) && strcmp(op->nbsp->type, "router") && strcmp(op->nbsp->type, "localport")) { continue; } for (size_t i = 0; i < op->n_lsp_addrs; i++) { for (size_t j = 0; j < op->lsp_addrs[i].n_ipv4_addrs; j++) { ds_clear(&match); ds_put_format(&match, "arp.tpa == %s && arp.op == 1", op->lsp_addrs[i].ipv4_addrs[j].addr_s); ds_clear(&actions); ds_put_format(&actions, "eth.dst = eth.src; " "eth.src = %s; " "arp.op = 2; /* ARP reply */ " "arp.tha = arp.sha; " "arp.sha = %s; " "arp.tpa = arp.spa; " "arp.spa = %s; " "outport = inport; " "flags.loopback = 1; " "output;", op->lsp_addrs[i].ea_s, op->lsp_addrs[i].ea_s, op->lsp_addrs[i].ipv4_addrs[j].addr_s); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_ARP_ND_RSP, 50, ds_cstr(&match), ds_cstr(&actions)); /* Do not reply to an ARP request from the port that owns the * address (otherwise a DHCP client that ARPs to check for a * duplicate address will fail). Instead, forward it the usual * way. * * (Another alternative would be to simply drop the packet. If * everything is working as it is configured, then this would * produce equivalent results, since no one should reply to the * request. But ARPing for one's own IP address is intended to * detect situations where the network is not working as * configured, so dropping the request would frustrate that * intent.) */ ds_put_format(&match, " && inport == %s", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_ARP_ND_RSP, 100, ds_cstr(&match), "next;"); } /* For ND solicitations, we need to listen for both the * unicast IPv6 address and its all-nodes multicast address, * but always respond with the unicast IPv6 address. */ for (size_t j = 0; j < op->lsp_addrs[i].n_ipv6_addrs; j++) { ds_clear(&match); ds_put_format(&match, "nd_ns && ip6.dst == {%s, %s} && nd.target == %s", op->lsp_addrs[i].ipv6_addrs[j].addr_s, op->lsp_addrs[i].ipv6_addrs[j].sn_addr_s, op->lsp_addrs[i].ipv6_addrs[j].addr_s); ds_clear(&actions); ds_put_format(&actions, "nd_na { " "eth.src = %s; " "ip6.src = %s; " "nd.target = %s; " "nd.tll = %s; " "outport = inport; " "flags.loopback = 1; " "output; " "};", op->lsp_addrs[i].ea_s, op->lsp_addrs[i].ipv6_addrs[j].addr_s, op->lsp_addrs[i].ipv6_addrs[j].addr_s, op->lsp_addrs[i].ea_s); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_ARP_ND_RSP, 50, ds_cstr(&match), ds_cstr(&actions)); /* Do not reply to a solicitation from the port that owns the * address (otherwise DAD detection will fail). */ ds_put_format(&match, " && inport == %s", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_ARP_ND_RSP, 100, ds_cstr(&match), "next;"); } } } /* Ingress table 10: ARP/ND responder, by default goto next. * (priority 0)*/ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } ovn_lflow_add(lflows, od, S_SWITCH_IN_ARP_ND_RSP, 0, "1", "next;"); } /* Logical switch ingress table 11 and 12: DHCP options and response * priority 100 flows. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } if (!lsp_is_enabled(op->nbsp) || !strcmp(op->nbsp->type, "router")) { /* Don't add the DHCP flows if the port is not enabled or if the * port is a router port. */ continue; } if (!op->nbsp->dhcpv4_options && !op->nbsp->dhcpv6_options) { /* CMS has disabled both native DHCPv4 and DHCPv6 for this lport. */ continue; } for (size_t i = 0; i < op->n_lsp_addrs; i++) { for (size_t j = 0; j < op->lsp_addrs[i].n_ipv4_addrs; j++) { struct ds options_action = DS_EMPTY_INITIALIZER; struct ds response_action = DS_EMPTY_INITIALIZER; struct ds ipv4_addr_match = DS_EMPTY_INITIALIZER; if (build_dhcpv4_action( op, op->lsp_addrs[i].ipv4_addrs[j].addr, &options_action, &response_action, &ipv4_addr_match)) { ds_clear(&match); ds_put_format( &match, "inport == %s && eth.src == %s && " "ip4.src == 0.0.0.0 && ip4.dst == 255.255.255.255 && " "udp.src == 68 && udp.dst == 67", op->json_key, op->lsp_addrs[i].ea_s); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_DHCP_OPTIONS, 100, ds_cstr(&match), ds_cstr(&options_action)); ds_clear(&match); /* Allow ip4.src = OFFER_IP and * ip4.dst = {SERVER_IP, 255.255.255.255} for the below * cases * - When the client wants to renew the IP by sending * the DHCPREQUEST to the server ip. * - When the client wants to renew the IP by * broadcasting the DHCPREQUEST. */ ds_put_format( &match, "inport == %s && eth.src == %s && " "%s && udp.src == 68 && udp.dst == 67", op->json_key, op->lsp_addrs[i].ea_s, ds_cstr(&ipv4_addr_match)); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_DHCP_OPTIONS, 100, ds_cstr(&match), ds_cstr(&options_action)); ds_clear(&match); /* If REGBIT_DHCP_OPTS_RESULT is set, it means the * put_dhcp_opts action is successful. */ ds_put_format( &match, "inport == %s && eth.src == %s && " "ip4 && udp.src == 68 && udp.dst == 67" " && "REGBIT_DHCP_OPTS_RESULT, op->json_key, op->lsp_addrs[i].ea_s); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_DHCP_RESPONSE, 100, ds_cstr(&match), ds_cstr(&response_action)); ds_destroy(&options_action); ds_destroy(&response_action); ds_destroy(&ipv4_addr_match); break; } } for (size_t j = 0; j < op->lsp_addrs[i].n_ipv6_addrs; j++) { struct ds options_action = DS_EMPTY_INITIALIZER; struct ds response_action = DS_EMPTY_INITIALIZER; if (build_dhcpv6_action( op, &op->lsp_addrs[i].ipv6_addrs[j].addr, &options_action, &response_action)) { ds_clear(&match); ds_put_format( &match, "inport == %s && eth.src == %s" " && ip6.dst == ff02::1:2 && udp.src == 546 &&" " udp.dst == 547", op->json_key, op->lsp_addrs[i].ea_s); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_DHCP_OPTIONS, 100, ds_cstr(&match), ds_cstr(&options_action)); /* If REGBIT_DHCP_OPTS_RESULT is set to 1, it means the * put_dhcpv6_opts action is successful */ ds_put_cstr(&match, " && "REGBIT_DHCP_OPTS_RESULT); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_DHCP_RESPONSE, 100, ds_cstr(&match), ds_cstr(&response_action)); ds_destroy(&options_action); ds_destroy(&response_action); break; } } } } /* Logical switch ingress table 13 and 14: DNS lookup and response * priority 100 flows. */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs || !ls_has_dns_records(od->nbs)) { continue; } struct ds action = DS_EMPTY_INITIALIZER; ds_clear(&match); ds_put_cstr(&match, "udp.dst == 53"); ds_put_format(&action, REGBIT_DNS_LOOKUP_RESULT" = dns_lookup(); next;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_LOOKUP, 100, ds_cstr(&match), ds_cstr(&action)); ds_clear(&action); ds_put_cstr(&match, " && "REGBIT_DNS_LOOKUP_RESULT); ds_put_format(&action, "eth.dst <-> eth.src; ip4.src <-> ip4.dst; " "udp.dst = udp.src; udp.src = 53; outport = inport; " "flags.loopback = 1; output;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 100, ds_cstr(&match), ds_cstr(&action)); ds_clear(&action); ds_put_format(&action, "eth.dst <-> eth.src; ip6.src <-> ip6.dst; " "udp.dst = udp.src; udp.src = 53; outport = inport; " "flags.loopback = 1; output;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 100, ds_cstr(&match), ds_cstr(&action)); ds_destroy(&action); } /* Ingress table 11 and 12: DHCP options and response, by default goto next. * (priority 0). * Ingress table 13 and 14: DNS lookup and response, by default goto next. * (priority 0).*/ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } ovn_lflow_add(lflows, od, S_SWITCH_IN_DHCP_OPTIONS, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_DHCP_RESPONSE, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_LOOKUP, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_IN_DNS_RESPONSE, 0, "1", "next;"); } /* Ingress table 15: Destination lookup, broadcast and multicast handling * (priority 100). */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } if (lsp_is_enabled(op->nbsp)) { ovn_multicast_add(mcgroups, &mc_flood, op); } } HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } ovn_lflow_add(lflows, od, S_SWITCH_IN_L2_LKUP, 100, "eth.mcast", "outport = \""MC_FLOOD"\"; output;"); } /* Ingress table 13: Destination lookup, unicast handling (priority 50), */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } for (size_t i = 0; i < op->nbsp->n_addresses; i++) { /* Addresses are owned by the logical port. * Ethernet address followed by zero or more IPv4 * or IPv6 addresses (or both). */ struct eth_addr mac; if (ovs_scan(op->nbsp->addresses[i], ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))) { ds_clear(&match); ds_put_format(&match, "eth.dst == "ETH_ADDR_FMT, ETH_ADDR_ARGS(mac)); ds_clear(&actions); ds_put_format(&actions, "outport = %s; output;", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_L2_LKUP, 50, ds_cstr(&match), ds_cstr(&actions)); } else if (!strcmp(op->nbsp->addresses[i], "unknown")) { if (lsp_is_enabled(op->nbsp)) { ovn_multicast_add(mcgroups, &mc_unknown, op); op->od->has_unknown = true; } } else if (is_dynamic_lsp_address(op->nbsp->addresses[i])) { if (!op->nbsp->dynamic_addresses || !ovs_scan(op->nbsp->dynamic_addresses, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))) { continue; } ds_clear(&match); ds_put_format(&match, "eth.dst == "ETH_ADDR_FMT, ETH_ADDR_ARGS(mac)); ds_clear(&actions); ds_put_format(&actions, "outport = %s; output;", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_L2_LKUP, 50, ds_cstr(&match), ds_cstr(&actions)); } else if (!strcmp(op->nbsp->addresses[i], "router")) { if (!op->peer || !op->peer->nbrp || !ovs_scan(op->peer->nbrp->mac, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))) { continue; } ds_clear(&match); ds_put_format(&match, "eth.dst == "ETH_ADDR_FMT, ETH_ADDR_ARGS(mac)); if (op->peer->od->l3dgw_port && op->peer == op->peer->od->l3dgw_port && op->peer->od->l3redirect_port) { /* The destination lookup flow for the router's * distributed gateway port MAC address should only be * programmed on the "redirect-chassis". */ ds_put_format(&match, " && is_chassis_resident(%s)", op->peer->od->l3redirect_port->json_key); } ds_clear(&actions); ds_put_format(&actions, "outport = %s; output;", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_L2_LKUP, 50, ds_cstr(&match), ds_cstr(&actions)); /* Add ethernet addresses specified in NAT rules on * distributed logical routers. */ if (op->peer->od->l3dgw_port && op->peer == op->peer->od->l3dgw_port) { for (int j = 0; j < op->peer->od->nbr->n_nat; j++) { const struct nbrec_nat *nat = op->peer->od->nbr->nat[j]; if (!strcmp(nat->type, "dnat_and_snat") && nat->logical_port && nat->external_mac && eth_addr_from_string(nat->external_mac, &mac)) { ds_clear(&match); ds_put_format(&match, "eth.dst == "ETH_ADDR_FMT " && is_chassis_resident(\"%s\")", ETH_ADDR_ARGS(mac), nat->logical_port); ds_clear(&actions); ds_put_format(&actions, "outport = %s; output;", op->json_key); ovn_lflow_add(lflows, op->od, S_SWITCH_IN_L2_LKUP, 50, ds_cstr(&match), ds_cstr(&actions)); } } } } else { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); VLOG_INFO_RL(&rl, "%s: invalid syntax '%s' in addresses column", op->nbsp->name, op->nbsp->addresses[i]); } } } /* Ingress table 13: Destination lookup for unknown MACs (priority 0). */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } if (od->has_unknown) { ovn_lflow_add(lflows, od, S_SWITCH_IN_L2_LKUP, 0, "1", "outport = \""MC_UNKNOWN"\"; output;"); } } /* Egress tables 6: Egress port security - IP (priority 0) * Egress table 7: Egress port security L2 - multicast/broadcast * (priority 100). */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs) { continue; } ovn_lflow_add(lflows, od, S_SWITCH_OUT_PORT_SEC_IP, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_SWITCH_OUT_PORT_SEC_L2, 100, "eth.mcast", "output;"); } /* Egress table 6: Egress port security - IP (priorities 90 and 80) * if port security enabled. * * Egress table 7: Egress port security - L2 (priorities 50 and 150). * * Priority 50 rules implement port security for enabled logical port. * * Priority 150 rules drop packets to disabled logical ports, so that they * don't even receive multicast or broadcast packets. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbsp) { continue; } ds_clear(&match); ds_put_format(&match, "outport == %s", op->json_key); if (lsp_is_enabled(op->nbsp)) { build_port_security_l2("eth.dst", op->ps_addrs, op->n_ps_addrs, &match); ovn_lflow_add(lflows, op->od, S_SWITCH_OUT_PORT_SEC_L2, 50, ds_cstr(&match), "output;"); } else { ovn_lflow_add(lflows, op->od, S_SWITCH_OUT_PORT_SEC_L2, 150, ds_cstr(&match), "drop;"); } if (op->nbsp->n_port_security) { build_port_security_ip(P_OUT, op, lflows); } } ds_destroy(&match); ds_destroy(&actions); } static bool lrport_is_enabled(const struct nbrec_logical_router_port *lrport) { return !lrport->enabled || *lrport->enabled; } /* Returns a string of the IP address of the router port 'op' that * overlaps with 'ip_s". If one is not found, returns NULL. * * The caller must not free the returned string. */ static const char * find_lrp_member_ip(const struct ovn_port *op, const char *ip_s) { bool is_ipv4 = strchr(ip_s, '.') ? true : false; if (is_ipv4) { ovs_be32 ip; if (!ip_parse(ip_s, &ip)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ip address %s", ip_s); return NULL; } for (int i = 0; i < op->lrp_networks.n_ipv4_addrs; i++) { const struct ipv4_netaddr *na = &op->lrp_networks.ipv4_addrs[i]; if (!((na->network ^ ip) & na->mask)) { /* There should be only 1 interface that matches the * supplied IP. Otherwise, it's a configuration error, * because subnets of a router's interfaces should NOT * overlap. */ return na->addr_s; } } } else { struct in6_addr ip6; if (!ipv6_parse(ip_s, &ip6)) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ipv6 address %s", ip_s); return NULL; } for (int i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) { const struct ipv6_netaddr *na = &op->lrp_networks.ipv6_addrs[i]; struct in6_addr xor_addr = ipv6_addr_bitxor(&na->network, &ip6); struct in6_addr and_addr = ipv6_addr_bitand(&xor_addr, &na->mask); if (ipv6_is_zero(&and_addr)) { /* There should be only 1 interface that matches the * supplied IP. Otherwise, it's a configuration error, * because subnets of a router's interfaces should NOT * overlap. */ return na->addr_s; } } } return NULL; } static void add_route(struct hmap *lflows, const struct ovn_port *op, const char *lrp_addr_s, const char *network_s, int plen, const char *gateway, const char *policy) { bool is_ipv4 = strchr(network_s, '.') ? true : false; struct ds match = DS_EMPTY_INITIALIZER; const char *dir; uint16_t priority; if (policy && !strcmp(policy, "src-ip")) { dir = "src"; priority = plen * 2; } else { dir = "dst"; priority = (plen * 2) + 1; } /* IPv6 link-local addresses must be scoped to the local router port. */ if (!is_ipv4) { struct in6_addr network; ovs_assert(ipv6_parse(network_s, &network)); if (in6_is_lla(&network)) { ds_put_format(&match, "inport == %s && ", op->json_key); } } ds_put_format(&match, "ip%s.%s == %s/%d", is_ipv4 ? "4" : "6", dir, network_s, plen); struct ds actions = DS_EMPTY_INITIALIZER; ds_put_format(&actions, "ip.ttl--; %sreg0 = ", is_ipv4 ? "" : "xx"); if (gateway) { ds_put_cstr(&actions, gateway); } else { ds_put_format(&actions, "ip%s.dst", is_ipv4 ? "4" : "6"); } ds_put_format(&actions, "; " "%sreg1 = %s; " "eth.src = %s; " "outport = %s; " "flags.loopback = 1; " "next;", is_ipv4 ? "" : "xx", lrp_addr_s, op->lrp_networks.ea_s, op->json_key); /* The priority here is calculated to implement longest-prefix-match * routing. */ ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_ROUTING, priority, ds_cstr(&match), ds_cstr(&actions)); ds_destroy(&match); ds_destroy(&actions); } static void build_static_route_flow(struct hmap *lflows, struct ovn_datapath *od, struct hmap *ports, const struct nbrec_logical_router_static_route *route) { ovs_be32 nexthop; const char *lrp_addr_s = NULL; unsigned int plen; bool is_ipv4; /* Verify that the next hop is an IP address with an all-ones mask. */ char *error = ip_parse_cidr(route->nexthop, &nexthop, &plen); if (!error) { if (plen != 32) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad next hop mask %s", route->nexthop); return; } is_ipv4 = true; } else { free(error); struct in6_addr ip6; error = ipv6_parse_cidr(route->nexthop, &ip6, &plen); if (!error) { if (plen != 128) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad next hop mask %s", route->nexthop); return; } is_ipv4 = false; } else { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad next hop ip address %s", route->nexthop); free(error); return; } } char *prefix_s; if (is_ipv4) { ovs_be32 prefix; /* Verify that ip prefix is a valid IPv4 address. */ error = ip_parse_cidr(route->ip_prefix, &prefix, &plen); if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad 'ip_prefix' in static routes %s", route->ip_prefix); free(error); return; } prefix_s = xasprintf(IP_FMT, IP_ARGS(prefix & be32_prefix_mask(plen))); } else { /* Verify that ip prefix is a valid IPv6 address. */ struct in6_addr prefix; error = ipv6_parse_cidr(route->ip_prefix, &prefix, &plen); if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad 'ip_prefix' in static routes %s", route->ip_prefix); free(error); return; } struct in6_addr mask = ipv6_create_mask(plen); struct in6_addr network = ipv6_addr_bitand(&prefix, &mask); prefix_s = xmalloc(INET6_ADDRSTRLEN); inet_ntop(AF_INET6, &network, prefix_s, INET6_ADDRSTRLEN); } /* Find the outgoing port. */ struct ovn_port *out_port = NULL; if (route->output_port) { out_port = ovn_port_find(ports, route->output_port); if (!out_port) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "Bad out port %s for static route %s", route->output_port, route->ip_prefix); goto free_prefix_s; } lrp_addr_s = find_lrp_member_ip(out_port, route->nexthop); if (!lrp_addr_s) { /* There are no IP networks configured on the router's port via * which 'route->nexthop' is theoretically reachable. But since * 'out_port' has been specified, we honor it by trying to reach * 'route->nexthop' via the first IP address of 'out_port'. * (There are cases, e.g in GCE, where each VM gets a /32 IP * address and the default gateway is still reachable from it.) */ if (is_ipv4) { if (out_port->lrp_networks.n_ipv4_addrs) { lrp_addr_s = out_port->lrp_networks.ipv4_addrs[0].addr_s; } } else { if (out_port->lrp_networks.n_ipv6_addrs) { lrp_addr_s = out_port->lrp_networks.ipv6_addrs[0].addr_s; } } } } else { /* output_port is not specified, find the * router port matching the next hop. */ int i; for (i = 0; i < od->nbr->n_ports; i++) { struct nbrec_logical_router_port *lrp = od->nbr->ports[i]; out_port = ovn_port_find(ports, lrp->name); if (!out_port) { /* This should not happen. */ continue; } lrp_addr_s = find_lrp_member_ip(out_port, route->nexthop); if (lrp_addr_s) { break; } } } if (!out_port || !lrp_addr_s) { /* There is no matched out port. */ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "No path for static route %s; next hop %s", route->ip_prefix, route->nexthop); goto free_prefix_s; } char *policy = route->policy ? route->policy : "dst-ip"; add_route(lflows, out_port, lrp_addr_s, prefix_s, plen, route->nexthop, policy); free_prefix_s: free(prefix_s); } static void op_put_v4_networks(struct ds *ds, const struct ovn_port *op, bool add_bcast) { if (!add_bcast && op->lrp_networks.n_ipv4_addrs == 1) { ds_put_format(ds, "%s", op->lrp_networks.ipv4_addrs[0].addr_s); return; } ds_put_cstr(ds, "{"); for (int i = 0; i < op->lrp_networks.n_ipv4_addrs; i++) { ds_put_format(ds, "%s, ", op->lrp_networks.ipv4_addrs[i].addr_s); if (add_bcast) { ds_put_format(ds, "%s, ", op->lrp_networks.ipv4_addrs[i].bcast_s); } } ds_chomp(ds, ' '); ds_chomp(ds, ','); ds_put_cstr(ds, "}"); } static void op_put_v6_networks(struct ds *ds, const struct ovn_port *op) { if (op->lrp_networks.n_ipv6_addrs == 1) { ds_put_format(ds, "%s", op->lrp_networks.ipv6_addrs[0].addr_s); return; } ds_put_cstr(ds, "{"); for (int i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) { ds_put_format(ds, "%s, ", op->lrp_networks.ipv6_addrs[i].addr_s); } ds_chomp(ds, ' '); ds_chomp(ds, ','); ds_put_cstr(ds, "}"); } static const char * get_force_snat_ip(struct ovn_datapath *od, const char *key_type, ovs_be32 *ip) { char *key = xasprintf("%s_force_snat_ip", key_type); const char *ip_address = smap_get(&od->nbr->options, key); free(key); if (ip_address) { ovs_be32 mask; char *error = ip_parse_masked(ip_address, ip, &mask); if (error || mask != OVS_BE32_MAX) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ip %s in options of router "UUID_FMT"", ip_address, UUID_ARGS(&od->key)); free(error); *ip = 0; return NULL; } return ip_address; } *ip = 0; return NULL; } static void add_router_lb_flow(struct hmap *lflows, struct ovn_datapath *od, struct ds *match, struct ds *actions, int priority, const char *lb_force_snat_ip, char *backend_ips, bool is_udp, int addr_family) { /* A match and actions for new connections. */ char *new_match = xasprintf("ct.new && %s", ds_cstr(match)); if (lb_force_snat_ip) { char *new_actions = xasprintf("flags.force_snat_for_lb = 1; %s", ds_cstr(actions)); ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, priority, new_match, new_actions); free(new_actions); } else { ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, priority, new_match, ds_cstr(actions)); } /* A match and actions for established connections. */ char *est_match = xasprintf("ct.est && %s", ds_cstr(match)); if (lb_force_snat_ip) { ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, priority, est_match, "flags.force_snat_for_lb = 1; ct_dnat;"); } else { ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, priority, est_match, "ct_dnat;"); } free(new_match); free(est_match); if (!od->l3dgw_port || !od->l3redirect_port || !backend_ips || addr_family != AF_INET) { return; } /* Add logical flows to UNDNAT the load balanced reverse traffic in * the router egress pipleine stage - S_ROUTER_OUT_UNDNAT if the logical * router has a gateway router port associated. */ struct ds undnat_match = DS_EMPTY_INITIALIZER; ds_put_cstr(&undnat_match, "ip4 && ("); char *start, *next, *ip_str; start = next = xstrdup(backend_ips); ip_str = strsep(&next, ","); bool backend_ips_found = false; while (ip_str && ip_str[0]) { char *ip_address = NULL; uint16_t port = 0; int addr_family; ip_address_and_port_from_lb_key(ip_str, &ip_address, &port, &addr_family); if (!ip_address) { break; } ds_put_format(&undnat_match, "(ip4.src == %s", ip_address); free(ip_address); if (port) { ds_put_format(&undnat_match, " && %s.src == %d) || ", is_udp ? "udp" : "tcp", port); } else { ds_put_cstr(&undnat_match, ") || "); } ip_str = strsep(&next, ","); backend_ips_found = true; } free(start); if (!backend_ips_found) { ds_destroy(&undnat_match); return; } ds_chomp(&undnat_match, ' '); ds_chomp(&undnat_match, '|'); ds_chomp(&undnat_match, '|'); ds_chomp(&undnat_match, ' '); ds_put_format(&undnat_match, ") && outport == %s && " "is_chassis_resident(%s)", od->l3dgw_port->json_key, od->l3redirect_port->json_key); if (lb_force_snat_ip) { ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 120, ds_cstr(&undnat_match), "flags.force_snat_for_lb = 1; ct_dnat;"); } else { ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 120, ds_cstr(&undnat_match), "ct_dnat;"); } ds_destroy(&undnat_match); } static void build_lrouter_flows(struct hmap *datapaths, struct hmap *ports, struct hmap *lflows) { /* This flow table structure is documented in ovn-northd(8), so please * update ovn-northd.8.xml if you change anything. */ struct ds match = DS_EMPTY_INITIALIZER; struct ds actions = DS_EMPTY_INITIALIZER; /* Logical router ingress table 0: Admission control framework. */ struct ovn_datapath *od; HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } /* Logical VLANs not supported. * Broadcast/multicast source address is invalid. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_ADMISSION, 100, "vlan.present || eth.src[40]", "drop;"); } /* Logical router ingress table 0: match (priority 50). */ struct ovn_port *op; HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbrp) { continue; } if (!lrport_is_enabled(op->nbrp)) { /* Drop packets from disabled logical ports (since logical flow * tables are default-drop). */ continue; } if (op->derived) { /* No ingress packets should be received on a chassisredirect * port. */ continue; } ds_clear(&match); ds_put_format(&match, "eth.mcast && inport == %s", op->json_key); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_ADMISSION, 50, ds_cstr(&match), "next;"); ds_clear(&match); ds_put_format(&match, "eth.dst == %s && inport == %s", op->lrp_networks.ea_s, op->json_key); if (op->od->l3dgw_port && op == op->od->l3dgw_port && op->od->l3redirect_port) { /* Traffic with eth.dst = l3dgw_port->lrp_networks.ea_s * should only be received on the "redirect-chassis". */ ds_put_format(&match, " && is_chassis_resident(%s)", op->od->l3redirect_port->json_key); } ovn_lflow_add(lflows, op->od, S_ROUTER_IN_ADMISSION, 50, ds_cstr(&match), "next;"); } /* Logical router ingress table 1: IP Input. */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } /* L3 admission control: drop multicast and broadcast source, localhost * source or destination, and zero network source or destination * (priority 100). */ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 100, "ip4.mcast || " "ip4.src == 255.255.255.255 || " "ip4.src == 127.0.0.0/8 || " "ip4.dst == 127.0.0.0/8 || " "ip4.src == 0.0.0.0/8 || " "ip4.dst == 0.0.0.0/8", "drop;"); /* ARP reply handling. Use ARP replies to populate the logical * router's ARP table. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 90, "arp.op == 2", "put_arp(inport, arp.spa, arp.sha);"); /* Drop Ethernet local broadcast. By definition this traffic should * not be forwarded.*/ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 50, "eth.bcast", "drop;"); /* TTL discard. * * XXX Need to send ICMP time exceeded if !ip.later_frag. */ ds_clear(&match); ds_put_cstr(&match, "ip4 && ip.ttl == {0, 1}"); ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 30, ds_cstr(&match), "drop;"); /* ND advertisement handling. Use advertisements to populate * the logical router's ARP/ND table. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 90, "nd_na", "put_nd(inport, nd.target, nd.tll);"); /* Lean from neighbor solicitations that were not directed at * us. (A priority-90 flow will respond to requests to us and * learn the sender's mac address. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 80, "nd_ns", "put_nd(inport, ip6.src, nd.sll);"); /* Pass other traffic not already handled to the next table for * routing. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_INPUT, 0, "1", "next;"); } /* Logical router ingress table 1: IP Input for IPv4. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbrp) { continue; } if (op->derived) { /* No ingress packets are accepted on a chassisredirect * port, so no need to program flows for that port. */ continue; } if (op->lrp_networks.n_ipv4_addrs) { /* L3 admission control: drop packets that originate from an * IPv4 address owned by the router or a broadcast address * known to the router (priority 100). */ ds_clear(&match); ds_put_cstr(&match, "ip4.src == "); op_put_v4_networks(&match, op, true); ds_put_cstr(&match, " && "REGBIT_EGRESS_LOOPBACK" == 0"); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 100, ds_cstr(&match), "drop;"); /* ICMP echo reply. These flows reply to ICMP echo requests * received for the router's IP address. Since packets only * get here as part of the logical router datapath, the inport * (i.e. the incoming locally attached net) does not matter. * The ip.ttl also does not matter (RFC1812 section 4.2.2.9) */ ds_clear(&match); ds_put_cstr(&match, "ip4.dst == "); op_put_v4_networks(&match, op, false); ds_put_cstr(&match, " && icmp4.type == 8 && icmp4.code == 0"); ds_clear(&actions); ds_put_format(&actions, "ip4.dst <-> ip4.src; " "ip.ttl = 255; " "icmp4.type = 0; " "flags.loopback = 1; " "next; "); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 90, ds_cstr(&match), ds_cstr(&actions)); } /* ARP reply. These flows reply to ARP requests for the router's own * IP address. */ for (int i = 0; i < op->lrp_networks.n_ipv4_addrs; i++) { ds_clear(&match); ds_put_format(&match, "inport == %s && arp.tpa == %s && arp.op == 1", op->json_key, op->lrp_networks.ipv4_addrs[i].addr_s); if (op->od->l3dgw_port && op == op->od->l3dgw_port && op->od->l3redirect_port) { /* Traffic with eth.src = l3dgw_port->lrp_networks.ea_s * should only be sent from the "redirect-chassis", so that * upstream MAC learning points to the "redirect-chassis". * Also need to avoid generation of multiple ARP responses * from different chassis. */ ds_put_format(&match, " && is_chassis_resident(%s)", op->od->l3redirect_port->json_key); } ds_clear(&actions); ds_put_format(&actions, "eth.dst = eth.src; " "eth.src = %s; " "arp.op = 2; /* ARP reply */ " "arp.tha = arp.sha; " "arp.sha = %s; " "arp.tpa = arp.spa; " "arp.spa = %s; " "outport = %s; " "flags.loopback = 1; " "output;", op->lrp_networks.ea_s, op->lrp_networks.ea_s, op->lrp_networks.ipv4_addrs[i].addr_s, op->json_key); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 90, ds_cstr(&match), ds_cstr(&actions)); } /* A set to hold all load-balancer vips that need ARP responses. */ struct sset all_ips = SSET_INITIALIZER(&all_ips); int addr_family; get_router_load_balancer_ips(op->od, &all_ips, &addr_family); const char *ip_address; SSET_FOR_EACH(ip_address, &all_ips) { ds_clear(&match); if (addr_family == AF_INET) { ds_put_format(&match, "inport == %s && arp.tpa == %s && arp.op == 1", op->json_key, ip_address); } else { ds_put_format(&match, "inport == %s && nd_ns && nd.target == %s", op->json_key, ip_address); } ds_clear(&actions); if (addr_family == AF_INET) { ds_put_format(&actions, "eth.dst = eth.src; " "eth.src = %s; " "arp.op = 2; /* ARP reply */ " "arp.tha = arp.sha; " "arp.sha = %s; " "arp.tpa = arp.spa; " "arp.spa = %s; " "outport = %s; " "flags.loopback = 1; " "output;", op->lrp_networks.ea_s, op->lrp_networks.ea_s, ip_address, op->json_key); } else { ds_put_format(&actions, "nd_na { " "eth.src = %s; " "ip6.src = %s; " "nd.target = %s; " "nd.tll = %s; " "outport = inport; " "flags.loopback = 1; " "output; " "};", op->lrp_networks.ea_s, ip_address, ip_address, op->lrp_networks.ea_s); } ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 90, ds_cstr(&match), ds_cstr(&actions)); } sset_destroy(&all_ips); /* A gateway router can have 2 SNAT IP addresses to force DNATed and * LBed traffic respectively to be SNATed. In addition, there can be * a number of SNAT rules in the NAT table. */ ovs_be32 *snat_ips = xmalloc(sizeof *snat_ips * (op->od->nbr->n_nat + 2)); size_t n_snat_ips = 0; ovs_be32 snat_ip; const char *dnat_force_snat_ip = get_force_snat_ip(op->od, "dnat", &snat_ip); if (dnat_force_snat_ip) { snat_ips[n_snat_ips++] = snat_ip; } const char *lb_force_snat_ip = get_force_snat_ip(op->od, "lb", &snat_ip); if (lb_force_snat_ip) { snat_ips[n_snat_ips++] = snat_ip; } for (int i = 0; i < op->od->nbr->n_nat; i++) { const struct nbrec_nat *nat; nat = op->od->nbr->nat[i]; ovs_be32 ip; if (!ip_parse(nat->external_ip, &ip) || !ip) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ip address %s in nat configuration " "for router %s", nat->external_ip, op->key); continue; } if (!strcmp(nat->type, "snat")) { snat_ips[n_snat_ips++] = ip; continue; } /* ARP handling for external IP addresses. * * DNAT IP addresses are external IP addresses that need ARP * handling. */ ds_clear(&match); ds_put_format(&match, "inport == %s && arp.tpa == "IP_FMT" && arp.op == 1", op->json_key, IP_ARGS(ip)); ds_clear(&actions); ds_put_format(&actions, "eth.dst = eth.src; " "arp.op = 2; /* ARP reply */ " "arp.tha = arp.sha; "); if (op->od->l3dgw_port && op == op->od->l3dgw_port) { struct eth_addr mac; if (nat->external_mac && eth_addr_from_string(nat->external_mac, &mac) && nat->logical_port) { /* distributed NAT case, use nat->external_mac */ ds_put_format(&actions, "eth.src = "ETH_ADDR_FMT"; " "arp.sha = "ETH_ADDR_FMT"; ", ETH_ADDR_ARGS(mac), ETH_ADDR_ARGS(mac)); /* Traffic with eth.src = nat->external_mac should only be * sent from the chassis where nat->logical_port is * resident, so that upstream MAC learning points to the * correct chassis. Also need to avoid generation of * multiple ARP responses from different chassis. */ ds_put_format(&match, " && is_chassis_resident(\"%s\")", nat->logical_port); } else { ds_put_format(&actions, "eth.src = %s; " "arp.sha = %s; ", op->lrp_networks.ea_s, op->lrp_networks.ea_s); /* Traffic with eth.src = l3dgw_port->lrp_networks.ea_s * should only be sent from the "redirect-chassis", so that * upstream MAC learning points to the "redirect-chassis". * Also need to avoid generation of multiple ARP responses * from different chassis. */ if (op->od->l3redirect_port) { ds_put_format(&match, " && is_chassis_resident(%s)", op->od->l3redirect_port->json_key); } } } else { ds_put_format(&actions, "eth.src = %s; " "arp.sha = %s; ", op->lrp_networks.ea_s, op->lrp_networks.ea_s); } ds_put_format(&actions, "arp.tpa = arp.spa; " "arp.spa = "IP_FMT"; " "outport = %s; " "flags.loopback = 1; " "output;", IP_ARGS(ip), op->json_key); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 90, ds_cstr(&match), ds_cstr(&actions)); } ds_clear(&match); ds_put_cstr(&match, "ip4.dst == {"); bool has_drop_ips = false; for (int i = 0; i < op->lrp_networks.n_ipv4_addrs; i++) { bool snat_ip_is_router_ip = false; for (int j = 0; j < n_snat_ips; j++) { /* Packets to SNAT IPs should not be dropped. */ if (op->lrp_networks.ipv4_addrs[i].addr == snat_ips[j]) { snat_ip_is_router_ip = true; break; } } if (snat_ip_is_router_ip) { continue; } ds_put_format(&match, "%s, ", op->lrp_networks.ipv4_addrs[i].addr_s); has_drop_ips = true; } ds_chomp(&match, ' '); ds_chomp(&match, ','); ds_put_cstr(&match, "}"); if (has_drop_ips) { /* Drop IP traffic to this router. */ ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 60, ds_cstr(&match), "drop;"); } free(snat_ips); } /* Logical router ingress table 1: IP Input for IPv6. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbrp) { continue; } if (op->derived) { /* No ingress packets are accepted on a chassisredirect * port, so no need to program flows for that port. */ continue; } if (op->lrp_networks.n_ipv6_addrs) { /* L3 admission control: drop packets that originate from an * IPv6 address owned by the router (priority 100). */ ds_clear(&match); ds_put_cstr(&match, "ip6.src == "); op_put_v6_networks(&match, op); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 100, ds_cstr(&match), "drop;"); /* ICMPv6 echo reply. These flows reply to echo requests * received for the router's IP address. */ ds_clear(&match); ds_put_cstr(&match, "ip6.dst == "); op_put_v6_networks(&match, op); ds_put_cstr(&match, " && icmp6.type == 128 && icmp6.code == 0"); ds_clear(&actions); ds_put_cstr(&actions, "ip6.dst <-> ip6.src; " "ip.ttl = 255; " "icmp6.type = 129; " "flags.loopback = 1; " "next; "); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 90, ds_cstr(&match), ds_cstr(&actions)); /* Drop IPv6 traffic to this router. */ ds_clear(&match); ds_put_cstr(&match, "ip6.dst == "); op_put_v6_networks(&match, op); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 60, ds_cstr(&match), "drop;"); } /* ND reply. These flows reply to ND solicitations for the * router's own IP address. */ for (int i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) { ds_clear(&match); ds_put_format(&match, "inport == %s && nd_ns && ip6.dst == {%s, %s} " "&& nd.target == %s", op->json_key, op->lrp_networks.ipv6_addrs[i].addr_s, op->lrp_networks.ipv6_addrs[i].sn_addr_s, op->lrp_networks.ipv6_addrs[i].addr_s); if (op->od->l3dgw_port && op == op->od->l3dgw_port && op->od->l3redirect_port) { /* Traffic with eth.src = l3dgw_port->lrp_networks.ea_s * should only be sent from the "redirect-chassis", so that * upstream MAC learning points to the "redirect-chassis". * Also need to avoid generation of multiple ND replies * from different chassis. */ ds_put_format(&match, " && is_chassis_resident(%s)", op->od->l3redirect_port->json_key); } ds_clear(&actions); ds_put_format(&actions, "put_nd(inport, ip6.src, nd.sll); " "nd_na { " "eth.src = %s; " "ip6.src = %s; " "nd.target = %s; " "nd.tll = %s; " "outport = inport; " "flags.loopback = 1; " "output; " "};", op->lrp_networks.ea_s, op->lrp_networks.ipv6_addrs[i].addr_s, op->lrp_networks.ipv6_addrs[i].addr_s, op->lrp_networks.ea_s); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_IP_INPUT, 90, ds_cstr(&match), ds_cstr(&actions)); } } /* NAT, Defrag and load balancing. */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } /* Packets are allowed by default. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_DEFRAG, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_ROUTER_IN_UNSNAT, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_ROUTER_OUT_SNAT, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_ROUTER_OUT_EGR_LOOP, 0, "1", "next;"); /* NAT rules are only valid on Gateway routers and routers with * l3dgw_port (router has a port with "redirect-chassis" * specified). */ if (!smap_get(&od->nbr->options, "chassis") && !od->l3dgw_port) { continue; } ovs_be32 snat_ip; const char *dnat_force_snat_ip = get_force_snat_ip(od, "dnat", &snat_ip); const char *lb_force_snat_ip = get_force_snat_ip(od, "lb", &snat_ip); for (int i = 0; i < od->nbr->n_nat; i++) { const struct nbrec_nat *nat; nat = od->nbr->nat[i]; ovs_be32 ip, mask; char *error = ip_parse_masked(nat->external_ip, &ip, &mask); if (error || mask != OVS_BE32_MAX) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad external ip %s for nat", nat->external_ip); free(error); continue; } /* Check the validity of nat->logical_ip. 'logical_ip' can * be a subnet when the type is "snat". */ error = ip_parse_masked(nat->logical_ip, &ip, &mask); if (!strcmp(nat->type, "snat")) { if (error) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ip network or ip %s for snat " "in router "UUID_FMT"", nat->logical_ip, UUID_ARGS(&od->key)); free(error); continue; } } else { if (error || mask != OVS_BE32_MAX) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad ip %s for dnat in router " ""UUID_FMT"", nat->logical_ip, UUID_ARGS(&od->key)); free(error); continue; } } /* For distributed router NAT, determine whether this NAT rule * satisfies the conditions for distributed NAT processing. */ bool distributed = false; struct eth_addr mac; if (od->l3dgw_port && !strcmp(nat->type, "dnat_and_snat") && nat->logical_port && nat->external_mac) { if (eth_addr_from_string(nat->external_mac, &mac)) { distributed = true; } else { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1); VLOG_WARN_RL(&rl, "bad mac %s for dnat in router " ""UUID_FMT"", nat->external_mac, UUID_ARGS(&od->key)); continue; } } /* Ingress UNSNAT table: It is for already established connections' * reverse traffic. i.e., SNAT has already been done in egress * pipeline and now the packet has entered the ingress pipeline as * part of a reply. We undo the SNAT here. * * Undoing SNAT has to happen before DNAT processing. This is * because when the packet was DNATed in ingress pipeline, it did * not know about the possibility of eventual additional SNAT in * egress pipeline. */ if (!strcmp(nat->type, "snat") || !strcmp(nat->type, "dnat_and_snat")) { if (!od->l3dgw_port) { /* Gateway router. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s", nat->external_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_UNSNAT, 90, ds_cstr(&match), "ct_snat; next;"); } else { /* Distributed router. */ /* Traffic received on l3dgw_port is subject to NAT. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s" " && inport == %s", nat->external_ip, od->l3dgw_port->json_key); if (!distributed && od->l3redirect_port) { /* Flows for NAT rules that are centralized are only * programmed on the "redirect-chassis". */ ds_put_format(&match, " && is_chassis_resident(%s)", od->l3redirect_port->json_key); } ovn_lflow_add(lflows, od, S_ROUTER_IN_UNSNAT, 100, ds_cstr(&match), "ct_snat;"); /* Traffic received on other router ports must be * redirected to the central instance of the l3dgw_port * for NAT processing. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s", nat->external_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_UNSNAT, 50, ds_cstr(&match), REGBIT_NAT_REDIRECT" = 1; next;"); } } /* Ingress DNAT table: Packets enter the pipeline with destination * IP address that needs to be DNATted from a external IP address * to a logical IP address. */ if (!strcmp(nat->type, "dnat") || !strcmp(nat->type, "dnat_and_snat")) { if (!od->l3dgw_port) { /* Gateway router. */ /* Packet when it goes from the initiator to destination. * We need to set flags.loopback because the router can * send the packet back through the same interface. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s", nat->external_ip); ds_clear(&actions); if (dnat_force_snat_ip) { /* Indicate to the future tables that a DNAT has taken * place and a force SNAT needs to be done in the * Egress SNAT table. */ ds_put_format(&actions, "flags.force_snat_for_dnat = 1; "); } ds_put_format(&actions, "flags.loopback = 1; ct_dnat(%s);", nat->logical_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, 100, ds_cstr(&match), ds_cstr(&actions)); } else { /* Distributed router. */ /* Traffic received on l3dgw_port is subject to NAT. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s" " && inport == %s", nat->external_ip, od->l3dgw_port->json_key); if (!distributed && od->l3redirect_port) { /* Flows for NAT rules that are centralized are only * programmed on the "redirect-chassis". */ ds_put_format(&match, " && is_chassis_resident(%s)", od->l3redirect_port->json_key); } ds_clear(&actions); ds_put_format(&actions, "ct_dnat(%s);", nat->logical_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, 100, ds_cstr(&match), ds_cstr(&actions)); /* Traffic received on other router ports must be * redirected to the central instance of the l3dgw_port * for NAT processing. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s", nat->external_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, 50, ds_cstr(&match), REGBIT_NAT_REDIRECT" = 1; next;"); } } /* Egress UNDNAT table: It is for already established connections' * reverse traffic. i.e., DNAT has already been done in ingress * pipeline and now the packet has entered the egress pipeline as * part of a reply. We undo the DNAT here. * * Note that this only applies for NAT on a distributed router. * Undo DNAT on a gateway router is done in the ingress DNAT * pipeline stage. */ if (od->l3dgw_port && (!strcmp(nat->type, "dnat") || !strcmp(nat->type, "dnat_and_snat"))) { ds_clear(&match); ds_put_format(&match, "ip && ip4.src == %s" " && outport == %s", nat->logical_ip, od->l3dgw_port->json_key); if (!distributed && od->l3redirect_port) { /* Flows for NAT rules that are centralized are only * programmed on the "redirect-chassis". */ ds_put_format(&match, " && is_chassis_resident(%s)", od->l3redirect_port->json_key); } ds_clear(&actions); if (distributed) { ds_put_format(&actions, "eth.src = "ETH_ADDR_FMT"; ", ETH_ADDR_ARGS(mac)); } ds_put_format(&actions, "ct_dnat;"); ovn_lflow_add(lflows, od, S_ROUTER_OUT_UNDNAT, 100, ds_cstr(&match), ds_cstr(&actions)); } /* Egress SNAT table: Packets enter the egress pipeline with * source ip address that needs to be SNATted to a external ip * address. */ if (!strcmp(nat->type, "snat") || !strcmp(nat->type, "dnat_and_snat")) { if (!od->l3dgw_port) { /* Gateway router. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.src == %s", nat->logical_ip); ds_clear(&actions); ds_put_format(&actions, "ct_snat(%s);", nat->external_ip); /* The priority here is calculated such that the * nat->logical_ip with the longest mask gets a higher * priority. */ ovn_lflow_add(lflows, od, S_ROUTER_OUT_SNAT, count_1bits(ntohl(mask)) + 1, ds_cstr(&match), ds_cstr(&actions)); } else { /* Distributed router. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.src == %s" " && outport == %s", nat->logical_ip, od->l3dgw_port->json_key); if (!distributed && od->l3redirect_port) { /* Flows for NAT rules that are centralized are only * programmed on the "redirect-chassis". */ ds_put_format(&match, " && is_chassis_resident(%s)", od->l3redirect_port->json_key); } ds_clear(&actions); if (distributed) { ds_put_format(&actions, "eth.src = "ETH_ADDR_FMT"; ", ETH_ADDR_ARGS(mac)); } ds_put_format(&actions, "ct_snat(%s);", nat->external_ip); /* The priority here is calculated such that the * nat->logical_ip with the longest mask gets a higher * priority. */ ovn_lflow_add(lflows, od, S_ROUTER_OUT_SNAT, count_1bits(ntohl(mask)) + 1, ds_cstr(&match), ds_cstr(&actions)); } } /* Logical router ingress table 0: * For NAT on a distributed router, add rules allowing * ingress traffic with eth.dst matching nat->external_mac * on the l3dgw_port instance where nat->logical_port is * resident. */ if (distributed) { ds_clear(&match); ds_put_format(&match, "eth.dst == "ETH_ADDR_FMT" && inport == %s" " && is_chassis_resident(\"%s\")", ETH_ADDR_ARGS(mac), od->l3dgw_port->json_key, nat->logical_port); ovn_lflow_add(lflows, od, S_ROUTER_IN_ADMISSION, 50, ds_cstr(&match), "next;"); } /* Ingress Gateway Redirect Table: For NAT on a distributed * router, add flows that are specific to a NAT rule. These * flows indicate the presence of an applicable NAT rule that * can be applied in a distributed manner. */ if (distributed) { ds_clear(&match); ds_put_format(&match, "ip4.src == %s && outport == %s", nat->logical_ip, od->l3dgw_port->json_key); ovn_lflow_add(lflows, od, S_ROUTER_IN_GW_REDIRECT, 100, ds_cstr(&match), "next;"); } /* Egress Loopback table: For NAT on a distributed router. * If packets in the egress pipeline on the distributed * gateway port have ip.dst matching a NAT external IP, then * loop a clone of the packet back to the beginning of the * ingress pipeline with inport = outport. */ if (od->l3dgw_port) { /* Distributed router. */ ds_clear(&match); ds_put_format(&match, "ip4.dst == %s && outport == %s", nat->external_ip, od->l3dgw_port->json_key); ds_clear(&actions); ds_put_format(&actions, "clone { ct_clear; " "inport = outport; outport = \"\"; " "flags = 0; flags.loopback = 1; "); for (int j = 0; j < MFF_N_LOG_REGS; j++) { ds_put_format(&actions, "reg%d = 0; ", j); } ds_put_format(&actions, REGBIT_EGRESS_LOOPBACK" = 1; " "next(pipeline=ingress, table=0); };"); ovn_lflow_add(lflows, od, S_ROUTER_OUT_EGR_LOOP, 100, ds_cstr(&match), ds_cstr(&actions)); } } /* Handle force SNAT options set in the gateway router. */ if (dnat_force_snat_ip && !od->l3dgw_port) { /* If a packet with destination IP address as that of the * gateway router (as set in options:dnat_force_snat_ip) is seen, * UNSNAT it. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s", dnat_force_snat_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_UNSNAT, 110, ds_cstr(&match), "ct_snat; next;"); /* Higher priority rules to force SNAT with the IP addresses * configured in the Gateway router. This only takes effect * when the packet has already been DNATed once. */ ds_clear(&match); ds_put_format(&match, "flags.force_snat_for_dnat == 1 && ip"); ds_clear(&actions); ds_put_format(&actions, "ct_snat(%s);", dnat_force_snat_ip); ovn_lflow_add(lflows, od, S_ROUTER_OUT_SNAT, 100, ds_cstr(&match), ds_cstr(&actions)); } if (lb_force_snat_ip && !od->l3dgw_port) { /* If a packet with destination IP address as that of the * gateway router (as set in options:lb_force_snat_ip) is seen, * UNSNAT it. */ ds_clear(&match); ds_put_format(&match, "ip && ip4.dst == %s", lb_force_snat_ip); ovn_lflow_add(lflows, od, S_ROUTER_IN_UNSNAT, 100, ds_cstr(&match), "ct_snat; next;"); /* Load balanced traffic will have flags.force_snat_for_lb set. * Force SNAT it. */ ds_clear(&match); ds_put_format(&match, "flags.force_snat_for_lb == 1 && ip"); ds_clear(&actions); ds_put_format(&actions, "ct_snat(%s);", lb_force_snat_ip); ovn_lflow_add(lflows, od, S_ROUTER_OUT_SNAT, 100, ds_cstr(&match), ds_cstr(&actions)); } if (!od->l3dgw_port) { /* For gateway router, re-circulate every packet through * the DNAT zone. This helps with two things. * * 1. Any packet that needs to be unDNATed in the reverse * direction gets unDNATed. Ideally this could be done in * the egress pipeline. But since the gateway router * does not have any feature that depends on the source * ip address being external IP address for IP routing, * we can do it here, saving a future re-circulation. * * 2. Any packet that was sent through SNAT zone in the * previous table automatically gets re-circulated to get * back the new destination IP address that is needed for * routing in the openflow pipeline. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_DNAT, 50, "ip", "flags.loopback = 1; ct_dnat;"); } else { /* For NAT on a distributed router, add flows to Ingress * IP Routing table, Ingress ARP Resolution table, and * Ingress Gateway Redirect Table that are not specific to a * NAT rule. */ /* The highest priority IN_IP_ROUTING rule matches packets * with REGBIT_NAT_REDIRECT (set in DNAT or UNSNAT stages), * with action "ip.ttl--; next;". The IN_GW_REDIRECT table * will take care of setting the outport. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_IP_ROUTING, 300, REGBIT_NAT_REDIRECT" == 1", "ip.ttl--; next;"); /* The highest priority IN_ARP_RESOLVE rule matches packets * with REGBIT_NAT_REDIRECT (set in DNAT or UNSNAT stages), * then sets eth.dst to the distributed gateway port's * ethernet address. */ ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", od->l3dgw_port->lrp_networks.ea_s); ovn_lflow_add(lflows, od, S_ROUTER_IN_ARP_RESOLVE, 200, REGBIT_NAT_REDIRECT" == 1", ds_cstr(&actions)); /* The highest priority IN_GW_REDIRECT rule redirects packets * with REGBIT_NAT_REDIRECT (set in DNAT or UNSNAT stages) to * the central instance of the l3dgw_port for NAT processing. */ ds_clear(&actions); ds_put_format(&actions, "outport = %s; next;", od->l3redirect_port->json_key); ovn_lflow_add(lflows, od, S_ROUTER_IN_GW_REDIRECT, 200, REGBIT_NAT_REDIRECT" == 1", ds_cstr(&actions)); } /* Load balancing and packet defrag are only valid on * Gateway routers or router with gateway port. */ if (!smap_get(&od->nbr->options, "chassis") && !od->l3dgw_port) { continue; } /* A set to hold all ips that need defragmentation and tracking. */ struct sset all_ips = SSET_INITIALIZER(&all_ips); for (int i = 0; i < od->nbr->n_load_balancer; i++) { struct nbrec_load_balancer *lb = od->nbr->load_balancer[i]; struct smap *vips = &lb->vips; struct smap_node *node; SMAP_FOR_EACH (node, vips) { uint16_t port = 0; int addr_family; /* node->key contains IP:port or just IP. */ char *ip_address = NULL; ip_address_and_port_from_lb_key(node->key, &ip_address, &port, &addr_family); if (!ip_address) { continue; } if (!sset_contains(&all_ips, ip_address)) { sset_add(&all_ips, ip_address); /* If there are any load balancing rules, we should send * the packet to conntrack for defragmentation and * tracking. This helps with two things. * * 1. With tracking, we can send only new connections to * pick a DNAT ip address from a group. * 2. If there are L4 ports in load balancing rules, we * need the defragmentation to match on L4 ports. */ ds_clear(&match); if (addr_family == AF_INET) { ds_put_format(&match, "ip && ip4.dst == %s", ip_address); } else { ds_put_format(&match, "ip && ip6.dst == %s", ip_address); } ovn_lflow_add(lflows, od, S_ROUTER_IN_DEFRAG, 100, ds_cstr(&match), "ct_next;"); } /* Higher priority rules are added for load-balancing in DNAT * table. For every match (on a VIP[:port]), we add two flows * via add_router_lb_flow(). One flow is for specific matching * on ct.new with an action of "ct_lb($targets);". The other * flow is for ct.est with an action of "ct_dnat;". */ ds_clear(&actions); ds_put_format(&actions, "ct_lb(%s);", node->value); ds_clear(&match); if (addr_family == AF_INET) { ds_put_format(&match, "ip && ip4.dst == %s", ip_address); } else { ds_put_format(&match, "ip && ip6.dst == %s", ip_address); } free(ip_address); int prio = 110; bool is_udp = lb->protocol && !strcmp(lb->protocol, "udp") ? true : false; if (port) { if (is_udp) { ds_put_format(&match, " && udp && udp.dst == %d", port); } else { ds_put_format(&match, " && tcp && tcp.dst == %d", port); } prio = 120; } if (od->l3redirect_port) { ds_put_format(&match, " && is_chassis_resident(%s)", od->l3redirect_port->json_key); } add_router_lb_flow(lflows, od, &match, &actions, prio, lb_force_snat_ip, node->value, is_udp, addr_family); } } sset_destroy(&all_ips); } /* Logical router ingress table 5 and 6: IPv6 Router Adv (RA) options and * response. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbrp || op->nbrp->peer || !op->peer) { continue; } if (!op->lrp_networks.n_ipv6_addrs) { continue; } const char *address_mode = smap_get( &op->nbrp->ipv6_ra_configs, "address_mode"); if (!address_mode) { continue; } if (strcmp(address_mode, "slaac") && strcmp(address_mode, "dhcpv6_stateful") && strcmp(address_mode, "dhcpv6_stateless")) { static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); VLOG_WARN_RL(&rl, "Invalid address mode [%s] defined", address_mode); continue; } ds_clear(&match); ds_put_format(&match, "inport == %s && ip6.dst == ff02::2 && nd_rs", op->json_key); ds_clear(&actions); const char *mtu_s = smap_get( &op->nbrp->ipv6_ra_configs, "mtu"); /* As per RFC 2460, 1280 is minimum IPv6 MTU. */ uint32_t mtu = (mtu_s && atoi(mtu_s) >= 1280) ? atoi(mtu_s) : 0; ds_put_format(&actions, REGBIT_ND_RA_OPTS_RESULT" = put_nd_ra_opts(" "addr_mode = \"%s\", slla = %s", address_mode, op->lrp_networks.ea_s); if (mtu > 0) { ds_put_format(&actions, ", mtu = %u", mtu); } bool add_rs_response_flow = false; for (size_t i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) { if (in6_is_lla(&op->lrp_networks.ipv6_addrs[i].network)) { continue; } /* Add the prefix option if the address mode is slaac or * dhcpv6_stateless. */ if (strcmp(address_mode, "dhcpv6_stateful")) { ds_put_format(&actions, ", prefix = %s/%u", op->lrp_networks.ipv6_addrs[i].network_s, op->lrp_networks.ipv6_addrs[i].plen); } add_rs_response_flow = true; } if (add_rs_response_flow) { ds_put_cstr(&actions, "); next;"); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_ND_RA_OPTIONS, 50, ds_cstr(&match), ds_cstr(&actions)); ds_clear(&actions); ds_clear(&match); ds_put_format(&match, "inport == %s && ip6.dst == ff02::2 && " "nd_ra && "REGBIT_ND_RA_OPTS_RESULT, op->json_key); char ip6_str[INET6_ADDRSTRLEN + 1]; struct in6_addr lla; in6_generate_lla(op->lrp_networks.ea, &lla); memset(ip6_str, 0, sizeof(ip6_str)); ipv6_string_mapped(ip6_str, &lla); ds_put_format(&actions, "eth.dst = eth.src; eth.src = %s; " "ip6.dst = ip6.src; ip6.src = %s; " "outport = inport; flags.loopback = 1; " "output;", op->lrp_networks.ea_s, ip6_str); ovn_lflow_add(lflows, op->od, S_ROUTER_IN_ND_RA_RESPONSE, 50, ds_cstr(&match), ds_cstr(&actions)); } } /* Logical router ingress table 5, 6: RS responder, by default goto next. * (priority 0)*/ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } ovn_lflow_add(lflows, od, S_ROUTER_IN_ND_RA_OPTIONS, 0, "1", "next;"); ovn_lflow_add(lflows, od, S_ROUTER_IN_ND_RA_RESPONSE, 0, "1", "next;"); } /* Logical router ingress table 7: IP Routing. * * A packet that arrives at this table is an IP packet that should be * routed to the address in 'ip[46].dst'. This table sets outport to * the correct output port, eth.src to the output port's MAC * address, and '[xx]reg0' to the next-hop IP address (leaving * 'ip[46].dst', the packet’s final destination, unchanged), and * advances to the next table for ARP/ND resolution. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbrp) { continue; } for (int i = 0; i < op->lrp_networks.n_ipv4_addrs; i++) { add_route(lflows, op, op->lrp_networks.ipv4_addrs[i].addr_s, op->lrp_networks.ipv4_addrs[i].network_s, op->lrp_networks.ipv4_addrs[i].plen, NULL, NULL); } for (int i = 0; i < op->lrp_networks.n_ipv6_addrs; i++) { add_route(lflows, op, op->lrp_networks.ipv6_addrs[i].addr_s, op->lrp_networks.ipv6_addrs[i].network_s, op->lrp_networks.ipv6_addrs[i].plen, NULL, NULL); } } /* Convert the static routes to flows. */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } for (int i = 0; i < od->nbr->n_static_routes; i++) { const struct nbrec_logical_router_static_route *route; route = od->nbr->static_routes[i]; build_static_route_flow(lflows, od, ports, route); } } /* XXX destination unreachable */ /* Local router ingress table 8: ARP Resolution. * * Any packet that reaches this table is an IP packet whose next-hop IP * address is in reg0. (ip4.dst is the final destination.) This table * resolves the IP address in reg0 into an output port in outport and an * Ethernet address in eth.dst. */ HMAP_FOR_EACH (op, key_node, ports) { if (op->nbsp && !lsp_is_enabled(op->nbsp)) { continue; } if (op->nbrp) { /* This is a logical router port. If next-hop IP address in * '[xx]reg0' matches IP address of this router port, then * the packet is intended to eventually be sent to this * logical port. Set the destination mac address using this * port's mac address. * * The packet is still in peer's logical pipeline. So the match * should be on peer's outport. */ if (op->peer && op->nbrp->peer) { if (op->lrp_networks.n_ipv4_addrs) { ds_clear(&match); ds_put_format(&match, "outport == %s && reg0 == ", op->peer->json_key); op_put_v4_networks(&match, op, false); ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", op->lrp_networks.ea_s); ovn_lflow_add(lflows, op->peer->od, S_ROUTER_IN_ARP_RESOLVE, 100, ds_cstr(&match), ds_cstr(&actions)); } if (op->lrp_networks.n_ipv6_addrs) { ds_clear(&match); ds_put_format(&match, "outport == %s && xxreg0 == ", op->peer->json_key); op_put_v6_networks(&match, op); ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", op->lrp_networks.ea_s); ovn_lflow_add(lflows, op->peer->od, S_ROUTER_IN_ARP_RESOLVE, 100, ds_cstr(&match), ds_cstr(&actions)); } } } else if (op->od->n_router_ports && strcmp(op->nbsp->type, "router")) { /* This is a logical switch port that backs a VM or a container. * Extract its addresses. For each of the address, go through all * the router ports attached to the switch (to which this port * connects) and if the address in question is reachable from the * router port, add an ARP/ND entry in that router's pipeline. */ for (size_t i = 0; i < op->n_lsp_addrs; i++) { const char *ea_s = op->lsp_addrs[i].ea_s; for (size_t j = 0; j < op->lsp_addrs[i].n_ipv4_addrs; j++) { const char *ip_s = op->lsp_addrs[i].ipv4_addrs[j].addr_s; for (size_t k = 0; k < op->od->n_router_ports; k++) { /* Get the Logical_Router_Port that the * Logical_Switch_Port is connected to, as * 'peer'. */ const char *peer_name = smap_get( &op->od->router_ports[k]->nbsp->options, "router-port"); if (!peer_name) { continue; } struct ovn_port *peer = ovn_port_find(ports, peer_name); if (!peer || !peer->nbrp) { continue; } if (!find_lrp_member_ip(peer, ip_s)) { continue; } ds_clear(&match); ds_put_format(&match, "outport == %s && reg0 == %s", peer->json_key, ip_s); ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", ea_s); ovn_lflow_add(lflows, peer->od, S_ROUTER_IN_ARP_RESOLVE, 100, ds_cstr(&match), ds_cstr(&actions)); } } for (size_t j = 0; j < op->lsp_addrs[i].n_ipv6_addrs; j++) { const char *ip_s = op->lsp_addrs[i].ipv6_addrs[j].addr_s; for (size_t k = 0; k < op->od->n_router_ports; k++) { /* Get the Logical_Router_Port that the * Logical_Switch_Port is connected to, as * 'peer'. */ const char *peer_name = smap_get( &op->od->router_ports[k]->nbsp->options, "router-port"); if (!peer_name) { continue; } struct ovn_port *peer = ovn_port_find(ports, peer_name); if (!peer || !peer->nbrp) { continue; } if (!find_lrp_member_ip(peer, ip_s)) { continue; } ds_clear(&match); ds_put_format(&match, "outport == %s && xxreg0 == %s", peer->json_key, ip_s); ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", ea_s); ovn_lflow_add(lflows, peer->od, S_ROUTER_IN_ARP_RESOLVE, 100, ds_cstr(&match), ds_cstr(&actions)); } } } } else if (!strcmp(op->nbsp->type, "router")) { /* This is a logical switch port that connects to a router. */ /* The peer of this switch port is the router port for which * we need to add logical flows such that it can resolve * ARP entries for all the other router ports connected to * the switch in question. */ const char *peer_name = smap_get(&op->nbsp->options, "router-port"); if (!peer_name) { continue; } struct ovn_port *peer = ovn_port_find(ports, peer_name); if (!peer || !peer->nbrp) { continue; } for (size_t i = 0; i < op->od->n_router_ports; i++) { const char *router_port_name = smap_get( &op->od->router_ports[i]->nbsp->options, "router-port"); struct ovn_port *router_port = ovn_port_find(ports, router_port_name); if (!router_port || !router_port->nbrp) { continue; } /* Skip the router port under consideration. */ if (router_port == peer) { continue; } if (router_port->lrp_networks.n_ipv4_addrs) { ds_clear(&match); ds_put_format(&match, "outport == %s && reg0 == ", peer->json_key); op_put_v4_networks(&match, router_port, false); ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", router_port->lrp_networks.ea_s); ovn_lflow_add(lflows, peer->od, S_ROUTER_IN_ARP_RESOLVE, 100, ds_cstr(&match), ds_cstr(&actions)); } if (router_port->lrp_networks.n_ipv6_addrs) { ds_clear(&match); ds_put_format(&match, "outport == %s && xxreg0 == ", peer->json_key); op_put_v6_networks(&match, router_port); ds_clear(&actions); ds_put_format(&actions, "eth.dst = %s; next;", router_port->lrp_networks.ea_s); ovn_lflow_add(lflows, peer->od, S_ROUTER_IN_ARP_RESOLVE, 100, ds_cstr(&match), ds_cstr(&actions)); } } } } HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } ovn_lflow_add(lflows, od, S_ROUTER_IN_ARP_RESOLVE, 0, "ip4", "get_arp(outport, reg0); next;"); ovn_lflow_add(lflows, od, S_ROUTER_IN_ARP_RESOLVE, 0, "ip6", "get_nd(outport, xxreg0); next;"); } /* Logical router ingress table 9: Gateway redirect. * * For traffic with outport equal to the l3dgw_port * on a distributed router, this table redirects a subset * of the traffic to the l3redirect_port which represents * the central instance of the l3dgw_port. */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } if (od->l3dgw_port && od->l3redirect_port) { /* For traffic with outport == l3dgw_port, if the * packet did not match any higher priority redirect * rule, then the traffic is redirected to the central * instance of the l3dgw_port. */ ds_clear(&match); ds_put_format(&match, "outport == %s", od->l3dgw_port->json_key); ds_clear(&actions); ds_put_format(&actions, "outport = %s; next;", od->l3redirect_port->json_key); ovn_lflow_add(lflows, od, S_ROUTER_IN_GW_REDIRECT, 50, ds_cstr(&match), ds_cstr(&actions)); /* If the Ethernet destination has not been resolved, * redirect to the central instance of the l3dgw_port. * Such traffic will be replaced by an ARP request or ND * Neighbor Solicitation in the ARP request ingress * table, before being redirected to the central instance. */ ds_put_format(&match, " && eth.dst == 00:00:00:00:00:00"); ovn_lflow_add(lflows, od, S_ROUTER_IN_GW_REDIRECT, 150, ds_cstr(&match), ds_cstr(&actions)); } /* Packets are allowed by default. */ ovn_lflow_add(lflows, od, S_ROUTER_IN_GW_REDIRECT, 0, "1", "next;"); } /* Local router ingress table 10: ARP request. * * In the common case where the Ethernet destination has been resolved, * this table outputs the packet (priority 0). Otherwise, it composes * and sends an ARP/IPv6 NA request (priority 100). */ HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbr) { continue; } ovn_lflow_add(lflows, od, S_ROUTER_IN_ARP_REQUEST, 100, "eth.dst == 00:00:00:00:00:00", "arp { " "eth.dst = ff:ff:ff:ff:ff:ff; " "arp.spa = reg1; " "arp.tpa = reg0; " "arp.op = 1; " /* ARP request */ "output; " "};"); ovn_lflow_add(lflows, od, S_ROUTER_IN_ARP_REQUEST, 100, "eth.dst == 00:00:00:00:00:00", "nd_ns { " "nd.target = xxreg0; " "output; " "};"); ovn_lflow_add(lflows, od, S_ROUTER_IN_ARP_REQUEST, 0, "1", "output;"); } /* Logical router egress table 1: Delivery (priority 100). * * Priority 100 rules deliver packets to enabled logical ports. */ HMAP_FOR_EACH (op, key_node, ports) { if (!op->nbrp) { continue; } if (!lrport_is_enabled(op->nbrp)) { /* Drop packets to disabled logical ports (since logical flow * tables are default-drop). */ continue; } if (op->derived) { /* No egress packets should be processed in the context of * a chassisredirect port. The chassisredirect port should * be replaced by the l3dgw port in the local output * pipeline stage before egress processing. */ continue; } ds_clear(&match); ds_put_format(&match, "outport == %s", op->json_key); ovn_lflow_add(lflows, op->od, S_ROUTER_OUT_DELIVERY, 100, ds_cstr(&match), "output;"); } ds_destroy(&match); ds_destroy(&actions); } /* Updates the Logical_Flow and Multicast_Group tables in the OVN_SB database, * constructing their contents based on the OVN_NB database. */ static void build_lflows(struct northd_context *ctx, struct hmap *datapaths, struct hmap *ports) { struct hmap lflows = HMAP_INITIALIZER(&lflows); struct hmap mcgroups = HMAP_INITIALIZER(&mcgroups); build_lswitch_flows(datapaths, ports, &lflows, &mcgroups); build_lrouter_flows(datapaths, ports, &lflows); /* Push changes to the Logical_Flow table to database. */ const struct sbrec_logical_flow *sbflow, *next_sbflow; SBREC_LOGICAL_FLOW_FOR_EACH_SAFE (sbflow, next_sbflow, ctx->ovnsb_idl) { struct ovn_datapath *od = ovn_datapath_from_sbrec(datapaths, sbflow->logical_datapath); if (!od) { sbrec_logical_flow_delete(sbflow); continue; } enum ovn_datapath_type dp_type = od->nbs ? DP_SWITCH : DP_ROUTER; enum ovn_pipeline pipeline = !strcmp(sbflow->pipeline, "ingress") ? P_IN : P_OUT; struct ovn_lflow *lflow = ovn_lflow_find( &lflows, od, ovn_stage_build(dp_type, pipeline, sbflow->table_id), sbflow->priority, sbflow->match, sbflow->actions); if (lflow) { ovn_lflow_destroy(&lflows, lflow); } else { sbrec_logical_flow_delete(sbflow); } } struct ovn_lflow *lflow, *next_lflow; HMAP_FOR_EACH_SAFE (lflow, next_lflow, hmap_node, &lflows) { enum ovn_pipeline pipeline = ovn_stage_get_pipeline(lflow->stage); uint8_t table = ovn_stage_get_table(lflow->stage); sbflow = sbrec_logical_flow_insert(ctx->ovnsb_txn); sbrec_logical_flow_set_logical_datapath(sbflow, lflow->od->sb); sbrec_logical_flow_set_pipeline( sbflow, pipeline == P_IN ? "ingress" : "egress"); sbrec_logical_flow_set_table_id(sbflow, table); sbrec_logical_flow_set_priority(sbflow, lflow->priority); sbrec_logical_flow_set_match(sbflow, lflow->match); sbrec_logical_flow_set_actions(sbflow, lflow->actions); /* Trim the source locator lflow->where, which looks something like * "ovn/northd/ovn-northd.c:1234", down to just the part following the * last slash, e.g. "ovn-northd.c:1234". */ const char *slash = strrchr(lflow->where, '/'); #if _WIN32 const char *backslash = strrchr(lflow->where, '\\'); if (!slash || backslash > slash) { slash = backslash; } #endif const char *where = slash ? slash + 1 : lflow->where; struct smap ids = SMAP_INITIALIZER(&ids); smap_add(&ids, "stage-name", ovn_stage_to_str(lflow->stage)); smap_add(&ids, "source", where); if (lflow->stage_hint) { smap_add(&ids, "stage-hint", lflow->stage_hint); } sbrec_logical_flow_set_external_ids(sbflow, &ids); smap_destroy(&ids); ovn_lflow_destroy(&lflows, lflow); } hmap_destroy(&lflows); /* Push changes to the Multicast_Group table to database. */ const struct sbrec_multicast_group *sbmc, *next_sbmc; SBREC_MULTICAST_GROUP_FOR_EACH_SAFE (sbmc, next_sbmc, ctx->ovnsb_idl) { struct ovn_datapath *od = ovn_datapath_from_sbrec(datapaths, sbmc->datapath); if (!od) { sbrec_multicast_group_delete(sbmc); continue; } struct multicast_group group = { .name = sbmc->name, .key = sbmc->tunnel_key }; struct ovn_multicast *mc = ovn_multicast_find(&mcgroups, od, &group); if (mc) { ovn_multicast_update_sbrec(mc, sbmc); ovn_multicast_destroy(&mcgroups, mc); } else { sbrec_multicast_group_delete(sbmc); } } struct ovn_multicast *mc, *next_mc; HMAP_FOR_EACH_SAFE (mc, next_mc, hmap_node, &mcgroups) { sbmc = sbrec_multicast_group_insert(ctx->ovnsb_txn); sbrec_multicast_group_set_datapath(sbmc, mc->datapath->sb); sbrec_multicast_group_set_name(sbmc, mc->group->name); sbrec_multicast_group_set_tunnel_key(sbmc, mc->group->key); ovn_multicast_update_sbrec(mc, sbmc); ovn_multicast_destroy(&mcgroups, mc); } hmap_destroy(&mcgroups); } /* OVN_Northbound and OVN_Southbound have an identical Address_Set table. * We always update OVN_Southbound to match the current data in * OVN_Northbound, so that the address sets used in Logical_Flows in * OVN_Southbound is checked against the proper set.*/ static void sync_address_sets(struct northd_context *ctx) { struct shash sb_address_sets = SHASH_INITIALIZER(&sb_address_sets); const struct sbrec_address_set *sb_address_set; SBREC_ADDRESS_SET_FOR_EACH (sb_address_set, ctx->ovnsb_idl) { shash_add(&sb_address_sets, sb_address_set->name, sb_address_set); } const struct nbrec_address_set *nb_address_set; NBREC_ADDRESS_SET_FOR_EACH (nb_address_set, ctx->ovnnb_idl) { sb_address_set = shash_find_and_delete(&sb_address_sets, nb_address_set->name); if (!sb_address_set) { sb_address_set = sbrec_address_set_insert(ctx->ovnsb_txn); sbrec_address_set_set_name(sb_address_set, nb_address_set->name); } sbrec_address_set_set_addresses(sb_address_set, /* "char **" is not compatible with "const char **" */ (const char **) nb_address_set->addresses, nb_address_set->n_addresses); } struct shash_node *node, *next; SHASH_FOR_EACH_SAFE (node, next, &sb_address_sets) { sbrec_address_set_delete(node->data); shash_delete(&sb_address_sets, node); } shash_destroy(&sb_address_sets); } /* * struct 'dns_info' is used to sync the DNS records between OVN Northbound db * and Southbound db. */ struct dns_info { struct hmap_node hmap_node; const struct nbrec_dns *nb_dns; /* DNS record in the Northbound db. */ const struct sbrec_dns *sb_dns; /* DNS record in the Soutbound db. */ /* Datapaths to which the DNS entry is associated with it. */ const struct sbrec_datapath_binding **sbs; size_t n_sbs; }; static inline struct dns_info * get_dns_info_from_hmap(struct hmap *dns_map, struct uuid *uuid) { struct dns_info *dns_info; size_t hash = uuid_hash(uuid); HMAP_FOR_EACH_WITH_HASH (dns_info, hmap_node, hash, dns_map) { if (uuid_equals(&dns_info->nb_dns->header_.uuid, uuid)) { return dns_info; } } return NULL; } static void sync_dns_entries(struct northd_context *ctx, struct hmap *datapaths) { struct hmap dns_map = HMAP_INITIALIZER(&dns_map); struct ovn_datapath *od; HMAP_FOR_EACH (od, key_node, datapaths) { if (!od->nbs || !od->nbs->n_dns_records) { continue; } for (size_t i = 0; i < od->nbs->n_dns_records; i++) { struct dns_info *dns_info = get_dns_info_from_hmap( &dns_map, &od->nbs->dns_records[i]->header_.uuid); if (!dns_info) { size_t hash = uuid_hash( &od->nbs->dns_records[i]->header_.uuid); dns_info = xzalloc(sizeof *dns_info);; dns_info->nb_dns = od->nbs->dns_records[i]; hmap_insert(&dns_map, &dns_info->hmap_node, hash); } dns_info->n_sbs++; dns_info->sbs = xrealloc(dns_info->sbs, dns_info->n_sbs * sizeof *dns_info->sbs); dns_info->sbs[dns_info->n_sbs - 1] = od->sb; } } const struct sbrec_dns *sbrec_dns, *next; SBREC_DNS_FOR_EACH_SAFE (sbrec_dns, next, ctx->ovnsb_idl) { const char *nb_dns_uuid = smap_get(&sbrec_dns->external_ids, "dns_id"); struct uuid dns_uuid; if (!nb_dns_uuid || !uuid_from_string(&dns_uuid, nb_dns_uuid)) { sbrec_dns_delete(sbrec_dns); continue; } struct dns_info *dns_info = get_dns_info_from_hmap(&dns_map, &dns_uuid); if (dns_info) { dns_info->sb_dns = sbrec_dns; } else { sbrec_dns_delete(sbrec_dns); } } struct dns_info *dns_info; HMAP_FOR_EACH_POP (dns_info, hmap_node, &dns_map) { if (!dns_info->sb_dns) { sbrec_dns = sbrec_dns_insert(ctx->ovnsb_txn); dns_info->sb_dns = sbrec_dns; char *dns_id = xasprintf( UUID_FMT, UUID_ARGS(&dns_info->nb_dns->header_.uuid)); const struct smap external_ids = SMAP_CONST1(&external_ids, "dns_id", dns_id); sbrec_dns_set_external_ids(sbrec_dns, &external_ids); free(dns_id); } /* Set the datapaths and records. If nothing has changed, then * this will be a no-op. */ sbrec_dns_set_datapaths( dns_info->sb_dns, (struct sbrec_datapath_binding **)dns_info->sbs, dns_info->n_sbs); sbrec_dns_set_records(dns_info->sb_dns, &dns_info->nb_dns->records); free(dns_info->sbs); free(dns_info); } hmap_destroy(&dns_map); } static void ovnnb_db_run(struct northd_context *ctx, struct chassis_index *chassis_index, struct ovsdb_idl_loop *sb_loop) { if (!ctx->ovnsb_txn || !ctx->ovnnb_txn) { return; } struct hmap datapaths, ports; build_datapaths(ctx, &datapaths); build_ports(ctx, &datapaths, chassis_index, &ports); build_ipam(&datapaths, &ports); build_lflows(ctx, &datapaths, &ports); sync_address_sets(ctx); sync_dns_entries(ctx, &datapaths); struct ovn_datapath *dp, *next_dp; HMAP_FOR_EACH_SAFE (dp, next_dp, key_node, &datapaths) { ovn_datapath_destroy(&datapaths, dp); } hmap_destroy(&datapaths); struct ovn_port *port, *next_port; HMAP_FOR_EACH_SAFE (port, next_port, key_node, &ports) { ovn_port_destroy(&ports, port); } hmap_destroy(&ports); /* Copy nb_cfg from northbound to southbound database. * * Also set up to update sb_cfg once our southbound transaction commits. */ const struct nbrec_nb_global *nb = nbrec_nb_global_first(ctx->ovnnb_idl); if (!nb) { nb = nbrec_nb_global_insert(ctx->ovnnb_txn); } const struct sbrec_sb_global *sb = sbrec_sb_global_first(ctx->ovnsb_idl); if (!sb) { sb = sbrec_sb_global_insert(ctx->ovnsb_txn); } sbrec_sb_global_set_nb_cfg(sb, nb->nb_cfg); sb_loop->next_cfg = nb->nb_cfg; cleanup_macam(&macam); } /* Handle changes to the 'chassis' column of the 'Port_Binding' table. When * this column is not empty, it means we need to set the corresponding logical * port as 'up' in the northbound DB. */ static void update_logical_port_status(struct northd_context *ctx) { struct hmap lports_hmap; const struct sbrec_port_binding *sb; const struct nbrec_logical_switch_port *nbsp; struct lport_hash_node { struct hmap_node node; const struct nbrec_logical_switch_port *nbsp; } *hash_node; hmap_init(&lports_hmap); NBREC_LOGICAL_SWITCH_PORT_FOR_EACH(nbsp, ctx->ovnnb_idl) { hash_node = xzalloc(sizeof *hash_node); hash_node->nbsp = nbsp; hmap_insert(&lports_hmap, &hash_node->node, hash_string(nbsp->name, 0)); } SBREC_PORT_BINDING_FOR_EACH(sb, ctx->ovnsb_idl) { nbsp = NULL; HMAP_FOR_EACH_WITH_HASH(hash_node, node, hash_string(sb->logical_port, 0), &lports_hmap) { if (!strcmp(sb->logical_port, hash_node->nbsp->name)) { nbsp = hash_node->nbsp; break; } } if (!nbsp) { /* The logical port doesn't exist for this port binding. This can * happen under normal circumstances when ovn-northd hasn't gotten * around to pruning the Port_Binding yet. */ continue; } bool up = (sb->chassis || !strcmp(nbsp->type, "router")); if (!nbsp->up || *nbsp->up != up) { nbrec_logical_switch_port_set_up(nbsp, &up, 1); } } HMAP_FOR_EACH_POP(hash_node, node, &lports_hmap) { free(hash_node); } hmap_destroy(&lports_hmap); } static struct gen_opts_map supported_dhcp_opts[] = { OFFERIP, DHCP_OPT_NETMASK, DHCP_OPT_ROUTER, DHCP_OPT_DNS_SERVER, DHCP_OPT_LOG_SERVER, DHCP_OPT_LPR_SERVER, DHCP_OPT_SWAP_SERVER, DHCP_OPT_POLICY_FILTER, DHCP_OPT_ROUTER_SOLICITATION, DHCP_OPT_NIS_SERVER, DHCP_OPT_NTP_SERVER, DHCP_OPT_SERVER_ID, DHCP_OPT_TFTP_SERVER, DHCP_OPT_CLASSLESS_STATIC_ROUTE, DHCP_OPT_MS_CLASSLESS_STATIC_ROUTE, DHCP_OPT_IP_FORWARD_ENABLE, DHCP_OPT_ROUTER_DISCOVERY, DHCP_OPT_ETHERNET_ENCAP, DHCP_OPT_DEFAULT_TTL, DHCP_OPT_TCP_TTL, DHCP_OPT_MTU, DHCP_OPT_LEASE_TIME, DHCP_OPT_T1, DHCP_OPT_T2 }; static struct gen_opts_map supported_dhcpv6_opts[] = { DHCPV6_OPT_IA_ADDR, DHCPV6_OPT_SERVER_ID, DHCPV6_OPT_DOMAIN_SEARCH, DHCPV6_OPT_DNS_SERVER }; static void check_and_add_supported_dhcp_opts_to_sb_db(struct northd_context *ctx) { struct hmap dhcp_opts_to_add = HMAP_INITIALIZER(&dhcp_opts_to_add); for (size_t i = 0; (i < sizeof(supported_dhcp_opts) / sizeof(supported_dhcp_opts[0])); i++) { hmap_insert(&dhcp_opts_to_add, &supported_dhcp_opts[i].hmap_node, dhcp_opt_hash(supported_dhcp_opts[i].name)); } const struct sbrec_dhcp_options *opt_row, *opt_row_next; SBREC_DHCP_OPTIONS_FOR_EACH_SAFE(opt_row, opt_row_next, ctx->ovnsb_idl) { struct gen_opts_map *dhcp_opt = dhcp_opts_find(&dhcp_opts_to_add, opt_row->name); if (dhcp_opt) { hmap_remove(&dhcp_opts_to_add, &dhcp_opt->hmap_node); } else { sbrec_dhcp_options_delete(opt_row); } } struct gen_opts_map *opt; HMAP_FOR_EACH (opt, hmap_node, &dhcp_opts_to_add) { struct sbrec_dhcp_options *sbrec_dhcp_option = sbrec_dhcp_options_insert(ctx->ovnsb_txn); sbrec_dhcp_options_set_name(sbrec_dhcp_option, opt->name); sbrec_dhcp_options_set_code(sbrec_dhcp_option, opt->code); sbrec_dhcp_options_set_type(sbrec_dhcp_option, opt->type); } hmap_destroy(&dhcp_opts_to_add); } static void check_and_add_supported_dhcpv6_opts_to_sb_db(struct northd_context *ctx) { struct hmap dhcpv6_opts_to_add = HMAP_INITIALIZER(&dhcpv6_opts_to_add); for (size_t i = 0; (i < sizeof(supported_dhcpv6_opts) / sizeof(supported_dhcpv6_opts[0])); i++) { hmap_insert(&dhcpv6_opts_to_add, &supported_dhcpv6_opts[i].hmap_node, dhcp_opt_hash(supported_dhcpv6_opts[i].name)); } const struct sbrec_dhcpv6_options *opt_row, *opt_row_next; SBREC_DHCPV6_OPTIONS_FOR_EACH_SAFE(opt_row, opt_row_next, ctx->ovnsb_idl) { struct gen_opts_map *dhcp_opt = dhcp_opts_find(&dhcpv6_opts_to_add, opt_row->name); if (dhcp_opt) { hmap_remove(&dhcpv6_opts_to_add, &dhcp_opt->hmap_node); } else { sbrec_dhcpv6_options_delete(opt_row); } } struct gen_opts_map *opt; HMAP_FOR_EACH(opt, hmap_node, &dhcpv6_opts_to_add) { struct sbrec_dhcpv6_options *sbrec_dhcpv6_option = sbrec_dhcpv6_options_insert(ctx->ovnsb_txn); sbrec_dhcpv6_options_set_name(sbrec_dhcpv6_option, opt->name); sbrec_dhcpv6_options_set_code(sbrec_dhcpv6_option, opt->code); sbrec_dhcpv6_options_set_type(sbrec_dhcpv6_option, opt->type); } hmap_destroy(&dhcpv6_opts_to_add); } static const char *rbac_chassis_auth[] = {"name"}; static const char *rbac_chassis_update[] = {"nb_cfg", "external_ids", "encaps", "vtep_logical_switches"}; static const char *rbac_encap_auth[] = {"chassis_name"}; static const char *rbac_encap_update[] = {"type", "options", "ip"}; static const char *rbac_port_binding_auth[] = {""}; static const char *rbac_port_binding_update[] = {"chassis"}; static const char *rbac_mac_binding_auth[] = {""}; static const char *rbac_mac_binding_update[] = {"logical_port", "ip", "mac", "datapath"}; static struct rbac_perm_cfg { const char *table; const char **auth; int n_auth; bool insdel; const char **update; int n_update; const struct sbrec_rbac_permission *row; } rbac_perm_cfg[] = { { .table = "Chassis", .auth = rbac_chassis_auth, .n_auth = ARRAY_SIZE(rbac_chassis_auth), .insdel = true, .update = rbac_chassis_update, .n_update = ARRAY_SIZE(rbac_chassis_update), .row = NULL },{ .table = "Encap", .auth = rbac_encap_auth, .n_auth = ARRAY_SIZE(rbac_encap_auth), .insdel = true, .update = rbac_encap_update, .n_update = ARRAY_SIZE(rbac_encap_update), .row = NULL },{ .table = "Port_Binding", .auth = rbac_port_binding_auth, .n_auth = ARRAY_SIZE(rbac_port_binding_auth), .insdel = false, .update = rbac_port_binding_update, .n_update = ARRAY_SIZE(rbac_port_binding_update), .row = NULL },{ .table = "MAC_Binding", .auth = rbac_mac_binding_auth, .n_auth = ARRAY_SIZE(rbac_mac_binding_auth), .insdel = true, .update = rbac_mac_binding_update, .n_update = ARRAY_SIZE(rbac_mac_binding_update), .row = NULL },{ .table = NULL, .auth = NULL, .n_auth = 0, .insdel = false, .update = NULL, .n_update = 0, .row = NULL } }; static bool ovn_rbac_validate_perm(const struct sbrec_rbac_permission *perm) { struct rbac_perm_cfg *pcfg; int i, j, n_found; for (pcfg = rbac_perm_cfg; pcfg->table; pcfg++) { if (!strcmp(perm->table, pcfg->table)) { break; } } if (!pcfg->table) { return false; } if (perm->n_authorization != pcfg->n_auth || perm->n_update != pcfg->n_update) { return false; } if (perm->insert_delete != pcfg->insdel) { return false; } /* verify perm->authorization vs. pcfg->auth */ n_found = 0; for (i = 0; i < pcfg->n_auth; i++) { for (j = 0; j < perm->n_authorization; j++) { if (!strcmp(pcfg->auth[i], perm->authorization[j])) { n_found++; break; } } } if (n_found != pcfg->n_auth) { return false; } /* verify perm->update vs. pcfg->update */ n_found = 0; for (i = 0; i < pcfg->n_update; i++) { for (j = 0; j < perm->n_update; j++) { if (!strcmp(pcfg->update[i], perm->update[j])) { n_found++; break; } } } if (n_found != pcfg->n_update) { return false; } /* Success, db state matches expected state */ pcfg->row = perm; return true; } static void ovn_rbac_create_perm(struct rbac_perm_cfg *pcfg, struct northd_context *ctx, const struct sbrec_rbac_role *rbac_role) { struct sbrec_rbac_permission *rbac_perm; rbac_perm = sbrec_rbac_permission_insert(ctx->ovnsb_txn); sbrec_rbac_permission_set_table(rbac_perm, pcfg->table); sbrec_rbac_permission_set_authorization(rbac_perm, pcfg->auth, pcfg->n_auth); sbrec_rbac_permission_set_insert_delete(rbac_perm, pcfg->insdel); sbrec_rbac_permission_set_update(rbac_perm, pcfg->update, pcfg->n_update); sbrec_rbac_role_update_permissions_setkey(rbac_role, pcfg->table, rbac_perm); } static void check_and_update_rbac(struct northd_context *ctx) { const struct sbrec_rbac_role *rbac_role = NULL; const struct sbrec_rbac_permission *perm_row, *perm_next; const struct sbrec_rbac_role *role_row, *role_row_next; struct rbac_perm_cfg *pcfg; for (pcfg = rbac_perm_cfg; pcfg->table; pcfg++) { pcfg->row = NULL; } SBREC_RBAC_PERMISSION_FOR_EACH_SAFE (perm_row, perm_next, ctx->ovnsb_idl) { if (!ovn_rbac_validate_perm(perm_row)) { sbrec_rbac_permission_delete(perm_row); } } SBREC_RBAC_ROLE_FOR_EACH_SAFE (role_row, role_row_next, ctx->ovnsb_idl) { if (strcmp(role_row->name, "ovn-controller")) { sbrec_rbac_role_delete(role_row); } else { rbac_role = role_row; } } if (!rbac_role) { rbac_role = sbrec_rbac_role_insert(ctx->ovnsb_txn); sbrec_rbac_role_set_name(rbac_role, "ovn-controller"); } for (pcfg = rbac_perm_cfg; pcfg->table; pcfg++) { if (!pcfg->row) { ovn_rbac_create_perm(pcfg, ctx, rbac_role); } } } /* Updates the sb_cfg and hv_cfg columns in the northbound NB_Global table. */ static void update_northbound_cfg(struct northd_context *ctx, struct ovsdb_idl_loop *sb_loop) { /* Update northbound sb_cfg if appropriate. */ const struct nbrec_nb_global *nbg = nbrec_nb_global_first(ctx->ovnnb_idl); int64_t sb_cfg = sb_loop->cur_cfg; if (nbg && sb_cfg && nbg->sb_cfg != sb_cfg) { nbrec_nb_global_set_sb_cfg(nbg, sb_cfg); } /* Update northbound hv_cfg if appropriate. */ if (nbg) { /* Find minimum nb_cfg among all chassis. */ const struct sbrec_chassis *chassis; int64_t hv_cfg = nbg->nb_cfg; SBREC_CHASSIS_FOR_EACH (chassis, ctx->ovnsb_idl) { if (chassis->nb_cfg < hv_cfg) { hv_cfg = chassis->nb_cfg; } } /* Update hv_cfg. */ if (nbg->hv_cfg != hv_cfg) { nbrec_nb_global_set_hv_cfg(nbg, hv_cfg); } } } /* Handle a fairly small set of changes in the southbound database. */ static void ovnsb_db_run(struct northd_context *ctx, struct ovsdb_idl_loop *sb_loop) { if (!ctx->ovnnb_txn || !ovsdb_idl_has_ever_connected(ctx->ovnsb_idl)) { return; } update_logical_port_status(ctx); update_northbound_cfg(ctx, sb_loop); } static void parse_options(int argc OVS_UNUSED, char *argv[] OVS_UNUSED) { enum { DAEMON_OPTION_ENUMS, VLOG_OPTION_ENUMS, SSL_OPTION_ENUMS, }; static const struct option long_options[] = { {"ovnsb-db", required_argument, NULL, 'd'}, {"ovnnb-db", required_argument, NULL, 'D'}, {"help", no_argument, NULL, 'h'}, {"options", no_argument, NULL, 'o'}, {"version", no_argument, NULL, 'V'}, DAEMON_LONG_OPTIONS, VLOG_LONG_OPTIONS, STREAM_SSL_LONG_OPTIONS, {NULL, 0, NULL, 0}, }; char *short_options = ovs_cmdl_long_options_to_short_options(long_options); for (;;) { int c; c = getopt_long(argc, argv, short_options, long_options, NULL); if (c == -1) { break; } switch (c) { DAEMON_OPTION_HANDLERS; VLOG_OPTION_HANDLERS; STREAM_SSL_OPTION_HANDLERS; case 'd': ovnsb_db = optarg; break; case 'D': ovnnb_db = optarg; break; case 'h': usage(); exit(EXIT_SUCCESS); case 'o': ovs_cmdl_print_options(long_options); exit(EXIT_SUCCESS); case 'V': ovs_print_version(0, 0); exit(EXIT_SUCCESS); default: break; } } if (!ovnsb_db) { ovnsb_db = default_sb_db(); } if (!ovnnb_db) { ovnnb_db = default_nb_db(); } free(short_options); } static void add_column_noalert(struct ovsdb_idl *idl, const struct ovsdb_idl_column *column) { ovsdb_idl_add_column(idl, column); ovsdb_idl_omit_alert(idl, column); } int main(int argc, char *argv[]) { int res = EXIT_SUCCESS; struct unixctl_server *unixctl; int retval; bool exiting; fatal_ignore_sigpipe(); ovs_cmdl_proctitle_init(argc, argv); set_program_name(argv[0]); service_start(&argc, &argv); parse_options(argc, argv); daemonize_start(false); retval = unixctl_server_create(NULL, &unixctl); if (retval) { exit(EXIT_FAILURE); } unixctl_command_register("exit", "", 0, 0, ovn_northd_exit, &exiting); daemonize_complete(); /* We want to detect (almost) all changes to the ovn-nb db. */ struct ovsdb_idl_loop ovnnb_idl_loop = OVSDB_IDL_LOOP_INITIALIZER( ovsdb_idl_create(ovnnb_db, &nbrec_idl_class, true, true)); ovsdb_idl_omit_alert(ovnnb_idl_loop.idl, &nbrec_nb_global_col_sb_cfg); ovsdb_idl_omit_alert(ovnnb_idl_loop.idl, &nbrec_nb_global_col_hv_cfg); /* We want to detect only selected changes to the ovn-sb db. */ struct ovsdb_idl_loop ovnsb_idl_loop = OVSDB_IDL_LOOP_INITIALIZER( ovsdb_idl_create(ovnsb_db, &sbrec_idl_class, false, true)); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_sb_global); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_sb_global_col_nb_cfg); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_logical_flow); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_logical_flow_col_logical_datapath); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_logical_flow_col_pipeline); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_logical_flow_col_table_id); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_logical_flow_col_priority); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_logical_flow_col_match); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_logical_flow_col_actions); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_multicast_group); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_multicast_group_col_datapath); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_multicast_group_col_tunnel_key); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_multicast_group_col_name); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_multicast_group_col_ports); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_datapath_binding); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_datapath_binding_col_tunnel_key); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_datapath_binding_col_external_ids); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_port_binding); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_datapath); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_logical_port); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_tunnel_key); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_parent_port); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_tag); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_type); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_options); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_mac); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_nat_addresses); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_port_binding_col_chassis); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_port_binding_col_gateway_chassis); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_gateway_chassis_col_chassis); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_gateway_chassis_col_name); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_gateway_chassis_col_priority); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_gateway_chassis_col_external_ids); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_gateway_chassis_col_options); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_port_binding_col_external_ids); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_mac_binding); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_mac_binding_col_datapath); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_mac_binding_col_ip); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_mac_binding_col_mac); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_mac_binding_col_logical_port); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_dhcp_options); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dhcp_options_col_code); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dhcp_options_col_type); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dhcp_options_col_name); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_dhcpv6_options); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dhcpv6_options_col_code); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dhcpv6_options_col_type); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dhcpv6_options_col_name); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_address_set); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_address_set_col_name); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_address_set_col_addresses); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_dns); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_datapaths); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_records); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_dns_col_external_ids); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_rbac_role); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_rbac_role_col_name); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_rbac_role_col_permissions); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_rbac_permission); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_rbac_permission_col_table); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_rbac_permission_col_authorization); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_rbac_permission_col_insert_delete); add_column_noalert(ovnsb_idl_loop.idl, &sbrec_rbac_permission_col_update); ovsdb_idl_add_table(ovnsb_idl_loop.idl, &sbrec_table_chassis); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_chassis_col_nb_cfg); ovsdb_idl_add_column(ovnsb_idl_loop.idl, &sbrec_chassis_col_name); /* Ensure that only a single ovn-northd is active in the deployment by * acquiring a lock called "ovn_northd" on the southbound database * and then only performing DB transactions if the lock is held. */ ovsdb_idl_set_lock(ovnsb_idl_loop.idl, "ovn_northd"); bool had_lock = false; /* Main loop. */ exiting = false; while (!exiting) { struct northd_context ctx = { .ovnnb_idl = ovnnb_idl_loop.idl, .ovnnb_txn = ovsdb_idl_loop_run(&ovnnb_idl_loop), .ovnsb_idl = ovnsb_idl_loop.idl, .ovnsb_txn = ovsdb_idl_loop_run(&ovnsb_idl_loop), }; if (!had_lock && ovsdb_idl_has_lock(ovnsb_idl_loop.idl)) { VLOG_INFO("ovn-northd lock acquired. " "This ovn-northd instance is now active."); had_lock = true; } else if (had_lock && !ovsdb_idl_has_lock(ovnsb_idl_loop.idl)) { VLOG_INFO("ovn-northd lock lost. " "This ovn-northd instance is now on standby."); had_lock = false; } struct chassis_index chassis_index; bool destroy_chassis_index = false; if (ovsdb_idl_has_lock(ovnsb_idl_loop.idl)) { chassis_index_init(&chassis_index, ctx.ovnsb_idl); destroy_chassis_index = true; ovnnb_db_run(&ctx, &chassis_index, &ovnsb_idl_loop); ovnsb_db_run(&ctx, &ovnsb_idl_loop); if (ctx.ovnsb_txn) { check_and_add_supported_dhcp_opts_to_sb_db(&ctx); check_and_add_supported_dhcpv6_opts_to_sb_db(&ctx); check_and_update_rbac(&ctx); } } unixctl_server_run(unixctl); unixctl_server_wait(unixctl); if (exiting) { poll_immediate_wake(); } ovsdb_idl_loop_commit_and_wait(&ovnnb_idl_loop); ovsdb_idl_loop_commit_and_wait(&ovnsb_idl_loop); poll_block(); if (should_service_stop()) { exiting = true; } if (destroy_chassis_index) { chassis_index_destroy(&chassis_index); } } unixctl_server_destroy(unixctl); ovsdb_idl_loop_destroy(&ovnnb_idl_loop); ovsdb_idl_loop_destroy(&ovnsb_idl_loop); service_stop(); exit(res); } static void ovn_northd_exit(struct unixctl_conn *conn, int argc OVS_UNUSED, const char *argv[] OVS_UNUSED, void *exiting_) { bool *exiting = exiting_; *exiting = true; unixctl_command_reply(conn, NULL); }