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ovn-controller-vtep: Add gateway module.
This commit adds the gateway module to ovn-controller-vtep. The module will register the physical switches to ovnsb as chassis and constantly update the "vtep_logical_switches" column in Chassis table. Limitation (Recorded in TODO file): - Do not support reading multiple tunnel ips of physical switch. Signed-off-by: Alex Wang <alexw@nicira.com> Acked-by: Russell Bryant <rbryant@redhat.com>
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| Original file line number | Diff line number | Diff line change |
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| /* Copyright (c) 2015 Nicira, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at: | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| #include <config.h> | ||
| #include "gateway.h" | ||
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| #include "lib/poll-loop.h" | ||
| #include "lib/simap.h" | ||
| #include "lib/sset.h" | ||
| #include "lib/util.h" | ||
| #include "openvswitch/vlog.h" | ||
| #include "ovn/lib/ovn-sb-idl.h" | ||
| #include "vtep/vtep-idl.h" | ||
| #include "ovn-controller-vtep.h" | ||
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| VLOG_DEFINE_THIS_MODULE(gateway); | ||
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| /* | ||
| * Registers the physical switches in vtep to ovnsb as chassis. For each | ||
| * physical switch in the vtep database, finds all vtep logical switches that | ||
| * are associated with the physical switch, and updates the corresponding | ||
| * chassis's 'vtep_logical_switches' column. | ||
| * | ||
| */ | ||
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| /* Global revalidation sequence number, incremented at each call to | ||
| * 'revalidate_gateway()'. */ | ||
| static unsigned int gw_reval_seq; | ||
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| /* Maps all chassis created by the gateway module to their own reval_seq. */ | ||
| static struct simap gw_chassis_map = SIMAP_INITIALIZER(&gw_chassis_map); | ||
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| /* Creates and returns a new instance of 'struct sbrec_chassis'. */ | ||
| static const struct sbrec_chassis * | ||
| create_chassis_rec(struct ovsdb_idl_txn *txn, const char *name, | ||
| const char *encap_ip) | ||
| { | ||
| const struct sbrec_chassis *chassis_rec; | ||
| struct sbrec_encap *encap_rec; | ||
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| VLOG_INFO("add Chassis row for VTEP physical switch (%s)", name); | ||
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| chassis_rec = sbrec_chassis_insert(txn); | ||
| sbrec_chassis_set_name(chassis_rec, name); | ||
| encap_rec = sbrec_encap_insert(txn); | ||
| sbrec_encap_set_type(encap_rec, OVN_SB_ENCAP_TYPE); | ||
| sbrec_encap_set_ip(encap_rec, encap_ip); | ||
| sbrec_chassis_set_encaps(chassis_rec, &encap_rec, 1); | ||
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| return chassis_rec; | ||
| } | ||
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| /* Revalidates chassis in ovnsb against vtep database. Creates chassis for | ||
| * new vtep physical switch. And removes chassis which no longer have | ||
| * physical switch in vtep. | ||
| * | ||
| * xxx: Support multiple tunnel encaps. | ||
| * | ||
| * */ | ||
| static void | ||
| revalidate_gateway(struct controller_vtep_ctx *ctx) | ||
| { | ||
| const struct vteprec_physical_switch *pswitch; | ||
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| /* Increments the global revalidation sequence number. */ | ||
| gw_reval_seq++; | ||
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| ovsdb_idl_txn_add_comment(ctx->ovnsb_idl_txn, | ||
| "ovn-controller-vtep: updating vtep chassis"); | ||
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| VTEPREC_PHYSICAL_SWITCH_FOR_EACH (pswitch, ctx->vtep_idl) { | ||
| const struct sbrec_chassis *chassis_rec; | ||
| struct simap_node *gw_node; | ||
| const char *encap_ip; | ||
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| encap_ip = pswitch->n_tunnel_ips ? pswitch->tunnel_ips[0] : ""; | ||
| gw_node = simap_find(&gw_chassis_map, pswitch->name); | ||
| chassis_rec = get_chassis_by_name(ctx->ovnsb_idl, pswitch->name); | ||
| if (chassis_rec) { | ||
| if (!gw_node && | ||
| (strcmp(chassis_rec->encaps[0]->type, OVN_SB_ENCAP_TYPE) | ||
| || strcmp(chassis_rec->encaps[0]->ip, encap_ip))) { | ||
| VLOG_WARN("Chassis config changing on startup, make sure " | ||
| "multiple chassis are not configured : %s/%s->%s/%s", | ||
| chassis_rec->encaps[0]->type, | ||
| chassis_rec->encaps[0]->ip, | ||
| OVN_SB_ENCAP_TYPE, encap_ip); | ||
| } | ||
| /* Updates chassis's encap if anything changed. */ | ||
| if (strcmp(chassis_rec->encaps[0]->type, OVN_SB_ENCAP_TYPE)) { | ||
| VLOG_WARN("Chassis for VTEP physical switch (%s) can only have " | ||
| "encap type \"%s\"", pswitch->name, OVN_SB_ENCAP_TYPE); | ||
| sbrec_encap_set_type(chassis_rec->encaps[0], OVN_SB_ENCAP_TYPE); | ||
| } | ||
| if (strcmp(chassis_rec->encaps[0]->ip, encap_ip)) { | ||
| sbrec_encap_set_ip(chassis_rec->encaps[0], encap_ip); | ||
| } | ||
| } else { | ||
| if (gw_node) { | ||
| VLOG_WARN("Chassis for VTEP physical switch (%s) disappears, " | ||
| "maybe deleted by ovn-sbctl, adding it back", | ||
| pswitch->name); | ||
| } | ||
| /* Creates a new chassis for the VTEP physical switch. */ | ||
| create_chassis_rec(ctx->ovnsb_idl_txn, pswitch->name, encap_ip); | ||
| } | ||
| /* Updates or creates the simap node for 'pswitch->name'. */ | ||
| simap_put(&gw_chassis_map, pswitch->name, gw_reval_seq); | ||
| } | ||
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| struct simap_node *iter, *next; | ||
| /* For 'gw_node' in 'gw_chassis_map' whose data is not | ||
| * 'gw_reval_seq', it means the corresponding physical switch no | ||
| * longer exist. So, garbage collects them. */ | ||
| SIMAP_FOR_EACH_SAFE (iter, next, &gw_chassis_map) { | ||
| if (iter->data != gw_reval_seq) { | ||
| const struct sbrec_chassis *chassis_rec; | ||
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| chassis_rec = get_chassis_by_name(ctx->ovnsb_idl, iter->name); | ||
| if (chassis_rec) { | ||
| sbrec_chassis_delete(chassis_rec); | ||
| } | ||
| simap_delete(&gw_chassis_map, iter); | ||
| } | ||
| } | ||
| } | ||
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| /* Updates the 'vtep_logical_switches' column in the Chassis table based | ||
| * on vtep database configuration. */ | ||
| static void | ||
| update_vtep_logical_switches(struct controller_vtep_ctx *ctx) | ||
| { | ||
| const struct vteprec_physical_switch *pswitch; | ||
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| ovsdb_idl_txn_add_comment(ctx->ovnsb_idl_txn, "ovn-controller-vtep: " | ||
| "updating chassis's vtep_logical_switches"); | ||
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| VTEPREC_PHYSICAL_SWITCH_FOR_EACH (pswitch, ctx->vtep_idl) { | ||
| const struct sbrec_chassis *chassis_rec = | ||
| get_chassis_by_name(ctx->ovnsb_idl, pswitch->name); | ||
| struct sset lswitches = SSET_INITIALIZER(&lswitches); | ||
| size_t i; | ||
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| for (i = 0; i < pswitch->n_ports; i++) { | ||
| const struct vteprec_physical_port *port = pswitch->ports[i]; | ||
| size_t j; | ||
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| for (j = 0; j < port->n_vlan_bindings; j++) { | ||
| const struct vteprec_logical_switch *vtep_lswitch; | ||
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| vtep_lswitch = port->value_vlan_bindings[j]; | ||
| /* If not already in 'lswitches', records it. */ | ||
| if (!sset_find(&lswitches, vtep_lswitch->name)) { | ||
| sset_add(&lswitches, vtep_lswitch->name); | ||
| } | ||
| } | ||
| } | ||
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| const char **ls_arr = sset_array(&lswitches); | ||
| sbrec_chassis_set_vtep_logical_switches(chassis_rec, ls_arr, | ||
| sset_count(&lswitches)); | ||
| free(ls_arr); | ||
| sset_destroy(&lswitches); | ||
| } | ||
| } | ||
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| void | ||
| gateway_run(struct controller_vtep_ctx *ctx) | ||
| { | ||
| if (!ctx->ovnsb_idl_txn) { | ||
| return; | ||
| } | ||
|
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| revalidate_gateway(ctx); | ||
| update_vtep_logical_switches(ctx); | ||
| } | ||
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| /* Destroys the chassis table entries for vtep physical switches. | ||
| * Returns true when all done. */ | ||
| bool | ||
| gateway_cleanup(struct controller_vtep_ctx *ctx) | ||
| { | ||
| static bool simap_destroyed = false; | ||
| const struct vteprec_physical_switch *pswitch; | ||
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| if (!ctx->ovnsb_idl_txn) { | ||
| return false; | ||
| } | ||
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| bool all_done = true; | ||
| ovsdb_idl_txn_add_comment(ctx->ovnsb_idl_txn, "ovn-controller-vtep: " | ||
| "unregistering vtep chassis"); | ||
| VTEPREC_PHYSICAL_SWITCH_FOR_EACH (pswitch, ctx->vtep_idl) { | ||
| const struct sbrec_chassis *chassis_rec; | ||
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| chassis_rec = get_chassis_by_name(ctx->ovnsb_idl, pswitch->name); | ||
| if (!chassis_rec) { | ||
| continue; | ||
| } | ||
| all_done = false; | ||
| sbrec_chassis_delete(chassis_rec); | ||
| } | ||
| if (!simap_destroyed) { | ||
| simap_destroy(&gw_chassis_map); | ||
| simap_destroyed = true; | ||
| } | ||
|
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| return all_done; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| /* Copyright (c) 2015 Nicira, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at: | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| #ifndef OVN_GATEWAY_H | ||
| #define OVN_GATEWAY_H 1 | ||
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| #include <stdbool.h> | ||
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| struct controller_vtep_ctx; | ||
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| void gateway_run(struct controller_vtep_ctx *); | ||
| bool gateway_cleanup(struct controller_vtep_ctx *); | ||
|
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| #endif /* ovn/controller-gw/gateway.h */ |
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