zebra/zebra_dplane.h

   1 /*
   2  * Zebra dataplane layer api interfaces.
   3  * Copyright (c) 2018 Volta Networks, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; see the file COPYING; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #ifndef _ZEBRA_DPLANE_H
  21 #define _ZEBRA_DPLANE_H 1
  22
  23 #include "lib/zebra.h"
  24 #include "lib/prefix.h"
  25 #include "lib/nexthop.h"
  26 #include "lib/nexthop_group.h"
  27 #include "lib/queue.h"
  28 #include "lib/vlan.h"
  29 #include "zebra/zebra_ns.h"
  30 #include "zebra/rib.h"
  31 #include "zebra/zserv.h"
  32 #include "zebra/zebra_mpls.h"
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 /* Key netlink info from zebra ns */
  39 struct zebra_dplane_info {
  40         ns_id_t ns_id;
  41
  42 #if defined(HAVE_NETLINK)
  43         struct nlsock nls;
  44         bool is_cmd;
  45 #endif
  46 };
  47
  48 /* Utility to fill in zns info from main zns struct */
  49 static inline void
  50 zebra_dplane_info_from_zns(struct zebra_dplane_info *zns_info,
  51                            const struct zebra_ns *zns, bool is_cmd)
  52 {
  53         zns_info->ns_id = zns->ns_id;
  54
  55 #if defined(HAVE_NETLINK)
  56         zns_info->is_cmd = is_cmd;
  57         if (is_cmd) {
  58                 zns_info->nls = zns->netlink_cmd;
  59         } else {
  60                 zns_info->nls = zns->netlink;
  61         }
  62 #endif /* NETLINK */
  63 }
  64
  65 /*
  66  * Result codes used when returning status back to the main zebra context.
  67  */
  68
  69 /*
  70  * Philosophy Note:
  71  *
  72  * Flags being SET/UNSET do not belong in the South Bound
  73  * Interface.  This Setting belongs at the calling level
  74  * because we can and will have multiple different interfaces
  75  * and we will have potentially multiple different
  76  * modules/filters to call.  As such Setting/Unsetting
  77  * success failure should be handled by the caller.
  78  */
  79 enum zebra_dplane_status {
  80         ZEBRA_DPLANE_STATUS_NONE = 0,
  81         ZEBRA_DPLANE_INSTALL_SUCCESS,
  82         ZEBRA_DPLANE_INSTALL_FAILURE,
  83         ZEBRA_DPLANE_DELETE_SUCCESS,
  84         ZEBRA_DPLANE_DELETE_FAILURE,
  85
  86 };
  87
  88 enum zebra_dplane_result {
  89         ZEBRA_DPLANE_REQUEST_QUEUED,
  90         ZEBRA_DPLANE_REQUEST_SUCCESS,
  91         ZEBRA_DPLANE_REQUEST_FAILURE,
  92 };
  93
  94 /*
  95  * API between the zebra dataplane system and the main zebra processing
  96  * context.
  97  */
  98
  99 /*
 100  * Enqueue a route install or update for the dataplane.
 101  */
 102 enum dplane_op_e {
 103         DPLANE_OP_NONE = 0,
 104
 105         /* Route update */
 106         DPLANE_OP_ROUTE_INSTALL,
 107         DPLANE_OP_ROUTE_UPDATE,
 108         DPLANE_OP_ROUTE_DELETE,
 109         DPLANE_OP_ROUTE_NOTIFY,
 110
 111         /* LSP update */
 112         DPLANE_OP_LSP_INSTALL,
 113         DPLANE_OP_LSP_UPDATE,
 114         DPLANE_OP_LSP_DELETE,
 115         DPLANE_OP_LSP_NOTIFY,
 116
 117         /* Pseudowire update */
 118         DPLANE_OP_PW_INSTALL,
 119         DPLANE_OP_PW_UNINSTALL,
 120
 121         /* System route notification */
 122         DPLANE_OP_SYS_ROUTE_ADD,
 123         DPLANE_OP_SYS_ROUTE_DELETE,
 124
 125         /* Interface address update */
 126         DPLANE_OP_ADDR_INSTALL,
 127         DPLANE_OP_ADDR_UNINSTALL,
 128
 129         /* MAC address update */
 130         DPLANE_OP_MAC_INSTALL,
 131         DPLANE_OP_MAC_DELETE,
 132 };
 133
 134 /* Enable system route notifications */
 135 void dplane_enable_sys_route_notifs(void);
 136
 137 /*
 138  * The dataplane context struct is used to exchange info between the main zebra
 139  * context and the dataplane module(s). If these are two independent pthreads,
 140  * they cannot share existing global data structures safely.
 141  */
 142
 143 /* Define a tailq list type for context blocks. The list is exposed/public,
 144  * but the internal linkage in the context struct is private, so there
 145  * are accessor apis that support enqueue and dequeue.
 146  */
 147 TAILQ_HEAD(dplane_ctx_q, zebra_dplane_ctx);
 148
 149 /* Allocate a context object */
 150 struct zebra_dplane_ctx *dplane_ctx_alloc(void);
 151
 152 /* Return a dataplane results context block after use; the caller's pointer will
 153  * be cleared.
 154  */
 155 void dplane_ctx_fini(struct zebra_dplane_ctx **pctx);
 156
 157 /* Enqueue a context block to caller's tailq. This exists so that the
 158  * context struct can remain opaque.
 159  */
 160 void dplane_ctx_enqueue_tail(struct dplane_ctx_q *q,
 161                              const struct zebra_dplane_ctx *ctx);
 162
 163 /* Append a list of context blocks to another list - again, just keeping
 164  * the context struct opaque.
 165  */
 166 void dplane_ctx_list_append(struct dplane_ctx_q *to_list,
 167                             struct dplane_ctx_q *from_list);
 168
 169 /* Dequeue a context block from the head of caller's tailq */
 170 struct zebra_dplane_ctx *dplane_ctx_dequeue(struct dplane_ctx_q *q);
 171
 172 /*
 173  * Accessors for information from the context object
 174  */
 175 enum zebra_dplane_result dplane_ctx_get_status(
 176         const struct zebra_dplane_ctx *ctx);
 177 void dplane_ctx_set_status(struct zebra_dplane_ctx *ctx,
 178                            enum zebra_dplane_result status);
 179 const char *dplane_res2str(enum zebra_dplane_result res);
 180
 181 enum dplane_op_e dplane_ctx_get_op(const struct zebra_dplane_ctx *ctx);
 182 void dplane_ctx_set_op(struct zebra_dplane_ctx *ctx, enum dplane_op_e op);
 183 const char *dplane_op2str(enum dplane_op_e op);
 184
 185 const struct prefix *dplane_ctx_get_dest(const struct zebra_dplane_ctx *ctx);
 186 void dplane_ctx_set_dest(struct zebra_dplane_ctx *ctx,
 187                          const struct prefix *dest);
 188 const char *dplane_ctx_get_ifname(const struct zebra_dplane_ctx *ctx);
 189 ifindex_t dplane_ctx_get_ifindex(const struct zebra_dplane_ctx *ctx);
 190
 191 /* Retrieve last/current provider id */
 192 uint32_t dplane_ctx_get_provider(const struct zebra_dplane_ctx *ctx);
 193
 194 /* Providers running before the kernel can control whether a kernel
 195  * update should be done.
 196  */
 197 void dplane_ctx_set_skip_kernel(struct zebra_dplane_ctx *ctx);
 198 bool dplane_ctx_is_skip_kernel(const struct zebra_dplane_ctx *ctx);
 199
 200 /* Source prefix is a little special - use convention to return NULL
 201  * to mean "no src prefix"
 202  */
 203 const struct prefix *dplane_ctx_get_src(const struct zebra_dplane_ctx *ctx);
 204 void dplane_ctx_set_src(struct zebra_dplane_ctx *ctx, const struct prefix *src);
 205
 206 bool dplane_ctx_is_update(const struct zebra_dplane_ctx *ctx);
 207 uint32_t dplane_ctx_get_seq(const struct zebra_dplane_ctx *ctx);
 208 uint32_t dplane_ctx_get_old_seq(const struct zebra_dplane_ctx *ctx);
 209 void dplane_ctx_set_vrf(struct zebra_dplane_ctx *ctx, vrf_id_t vrf);
 210 vrf_id_t dplane_ctx_get_vrf(const struct zebra_dplane_ctx *ctx);
 211
 212 bool dplane_ctx_is_from_notif(const struct zebra_dplane_ctx *ctx);
 213 void dplane_ctx_set_notif_provider(struct zebra_dplane_ctx *ctx,
 214                                    uint32_t id);
 215 uint32_t dplane_ctx_get_notif_provider(const struct zebra_dplane_ctx *ctx);
 216
 217 /* Accessors for route update information */
 218 void dplane_ctx_set_type(struct zebra_dplane_ctx *ctx, int type);
 219 int dplane_ctx_get_type(const struct zebra_dplane_ctx *ctx);
 220 int dplane_ctx_get_old_type(const struct zebra_dplane_ctx *ctx);
 221 void dplane_ctx_set_afi(struct zebra_dplane_ctx *ctx, afi_t afi);
 222 afi_t dplane_ctx_get_afi(const struct zebra_dplane_ctx *ctx);
 223 void dplane_ctx_set_safi(struct zebra_dplane_ctx *ctx, safi_t safi);
 224 safi_t dplane_ctx_get_safi(const struct zebra_dplane_ctx *ctx);
 225 void dplane_ctx_set_table(struct zebra_dplane_ctx *ctx, uint32_t table);
 226 uint32_t dplane_ctx_get_table(const struct zebra_dplane_ctx *ctx);
 227 route_tag_t dplane_ctx_get_tag(const struct zebra_dplane_ctx *ctx);
 228 void dplane_ctx_set_tag(struct zebra_dplane_ctx *ctx, route_tag_t tag);
 229 route_tag_t dplane_ctx_get_old_tag(const struct zebra_dplane_ctx *ctx);
 230 uint16_t dplane_ctx_get_instance(const struct zebra_dplane_ctx *ctx);
 231 void dplane_ctx_set_instance(struct zebra_dplane_ctx *ctx, uint16_t instance);
 232 uint16_t dplane_ctx_get_old_instance(const struct zebra_dplane_ctx *ctx);
 233 uint32_t dplane_ctx_get_metric(const struct zebra_dplane_ctx *ctx);
 234 uint32_t dplane_ctx_get_old_metric(const struct zebra_dplane_ctx *ctx);
 235 uint32_t dplane_ctx_get_mtu(const struct zebra_dplane_ctx *ctx);
 236 uint32_t dplane_ctx_get_nh_mtu(const struct zebra_dplane_ctx *ctx);
 237 uint8_t dplane_ctx_get_distance(const struct zebra_dplane_ctx *ctx);
 238 void dplane_ctx_set_distance(struct zebra_dplane_ctx *ctx, uint8_t distance);
 239 uint8_t dplane_ctx_get_old_distance(const struct zebra_dplane_ctx *ctx);
 240
 241 void dplane_ctx_set_nexthops(struct zebra_dplane_ctx *ctx, struct nexthop *nh);
 242 const struct nexthop_group *dplane_ctx_get_ng(
 243         const struct zebra_dplane_ctx *ctx);
 244 const struct nexthop_group *dplane_ctx_get_old_ng(
 245         const struct zebra_dplane_ctx *ctx);
 246
 247 /* Accessors for LSP information */
 248 mpls_label_t dplane_ctx_get_in_label(const struct zebra_dplane_ctx *ctx);
 249 void dplane_ctx_set_in_label(struct zebra_dplane_ctx *ctx,
 250                              mpls_label_t label);
 251 uint8_t dplane_ctx_get_addr_family(const struct zebra_dplane_ctx *ctx);
 252 void dplane_ctx_set_addr_family(struct zebra_dplane_ctx *ctx,
 253                                 uint8_t family);
 254 uint32_t dplane_ctx_get_lsp_flags(const struct zebra_dplane_ctx *ctx);
 255 void dplane_ctx_set_lsp_flags(struct zebra_dplane_ctx *ctx,
 256                               uint32_t flags);
 257 const zebra_nhlfe_t *dplane_ctx_get_nhlfe(const struct zebra_dplane_ctx *ctx);
 258 zebra_nhlfe_t *dplane_ctx_add_nhlfe(struct zebra_dplane_ctx *ctx,
 259                                     enum lsp_types_t lsp_type,
 260                                     enum nexthop_types_t nh_type,
 261                                     union g_addr *gate,
 262                                     ifindex_t ifindex,
 263                                     mpls_label_t out_label);
 264
 265 const zebra_nhlfe_t *dplane_ctx_get_best_nhlfe(
 266         const struct zebra_dplane_ctx *ctx);
 267 const zebra_nhlfe_t *dplane_ctx_set_best_nhlfe(struct zebra_dplane_ctx *ctx,
 268                                                zebra_nhlfe_t *nhlfe);
 269 uint32_t dplane_ctx_get_lsp_num_ecmp(const struct zebra_dplane_ctx *ctx);
 270
 271 /* Accessors for pseudowire information */
 272 mpls_label_t dplane_ctx_get_pw_local_label(const struct zebra_dplane_ctx *ctx);
 273 mpls_label_t dplane_ctx_get_pw_remote_label(const struct zebra_dplane_ctx *ctx);
 274 int dplane_ctx_get_pw_type(const struct zebra_dplane_ctx *ctx);
 275 int dplane_ctx_get_pw_af(const struct zebra_dplane_ctx *ctx);
 276 uint32_t dplane_ctx_get_pw_flags(const struct zebra_dplane_ctx *ctx);
 277 int dplane_ctx_get_pw_status(const struct zebra_dplane_ctx *ctx);
 278 const union g_addr *dplane_ctx_get_pw_dest(
 279         const struct zebra_dplane_ctx *ctx);
 280 const union pw_protocol_fields *dplane_ctx_get_pw_proto(
 281         const struct zebra_dplane_ctx *ctx);
 282 const struct nexthop_group *dplane_ctx_get_pw_nhg(
 283         const struct zebra_dplane_ctx *ctx);
 284
 285 /* Accessors for interface information */
 286 uint32_t dplane_ctx_get_intf_metric(const struct zebra_dplane_ctx *ctx);
 287 /* Is interface addr p2p? */
 288 bool dplane_ctx_intf_is_connected(const struct zebra_dplane_ctx *ctx);
 289 bool dplane_ctx_intf_is_secondary(const struct zebra_dplane_ctx *ctx);
 290 bool dplane_ctx_intf_is_broadcast(const struct zebra_dplane_ctx *ctx);
 291 const struct prefix *dplane_ctx_get_intf_addr(
 292         const struct zebra_dplane_ctx *ctx);
 293 bool dplane_ctx_intf_has_dest(const struct zebra_dplane_ctx *ctx);
 294 const struct prefix *dplane_ctx_get_intf_dest(
 295         const struct zebra_dplane_ctx *ctx);
 296 bool dplane_ctx_intf_has_label(const struct zebra_dplane_ctx *ctx);
 297 const char *dplane_ctx_get_intf_label(const struct zebra_dplane_ctx *ctx);
 298
 299 /* Accessors for MAC information */
 300 vlanid_t dplane_ctx_mac_get_vlan(const struct zebra_dplane_ctx *ctx);
 301 bool dplane_ctx_mac_is_sticky(const struct zebra_dplane_ctx *ctx);
 302 const struct ethaddr *dplane_ctx_mac_get_addr(
 303         const struct zebra_dplane_ctx *ctx);
 304 const struct in_addr *dplane_ctx_mac_get_vtep_ip(
 305         const struct zebra_dplane_ctx *ctx);
 306
 307 /* Namespace info - esp. for netlink communication */
 308 const struct zebra_dplane_info *dplane_ctx_get_ns(
 309         const struct zebra_dplane_ctx *ctx);
 310
 311 /* Indicates zebra shutdown/exit is in progress. Some operations may be
 312  * simplified or skipped during shutdown processing.
 313  */
 314 bool dplane_is_in_shutdown(void);
 315
 316 /*
 317  * Enqueue route change operations for the dataplane.
 318  */
 319 enum zebra_dplane_result dplane_route_add(struct route_node *rn,
 320                                           struct route_entry *re);
 321
 322 enum zebra_dplane_result dplane_route_update(struct route_node *rn,
 323                                              struct route_entry *re,
 324                                              struct route_entry *old_re);
 325
 326 enum zebra_dplane_result dplane_route_delete(struct route_node *rn,
 327                                              struct route_entry *re);
 328
 329 /* Notify the dplane when system/connected routes change */
 330 enum zebra_dplane_result dplane_sys_route_add(struct route_node *rn,
 331                                               struct route_entry *re);
 332 enum zebra_dplane_result dplane_sys_route_del(struct route_node *rn,
 333                                               struct route_entry *re);
 334
 335 /* Update from an async notification, to bring other fibs up-to-date */
 336 enum zebra_dplane_result dplane_route_notif_update(
 337         struct route_node *rn,
 338         struct route_entry *re,
 339         enum dplane_op_e op,
 340         struct zebra_dplane_ctx *ctx);
 341
 342 /*
 343  * Enqueue LSP change operations for the dataplane.
 344  */
 345 enum zebra_dplane_result dplane_lsp_add(zebra_lsp_t *lsp);
 346 enum zebra_dplane_result dplane_lsp_update(zebra_lsp_t *lsp);
 347 enum zebra_dplane_result dplane_lsp_delete(zebra_lsp_t *lsp);
 348
 349 /* Update or un-install resulting from an async notification */
 350 enum zebra_dplane_result dplane_lsp_notif_update(zebra_lsp_t *lsp,
 351                                                  enum dplane_op_e op,
 352                                                  struct zebra_dplane_ctx *ctx);
 353
 354 /*
 355  * Enqueue pseudowire operations for the dataplane.
 356  */
 357 enum zebra_dplane_result dplane_pw_install(struct zebra_pw *pw);
 358 enum zebra_dplane_result dplane_pw_uninstall(struct zebra_pw *pw);
 359
 360 /*
 361  * Enqueue interface address changes for the dataplane.
 362  */
 363 enum zebra_dplane_result dplane_intf_addr_set(const struct interface *ifp,
 364                                               const struct connected *ifc);
 365 enum zebra_dplane_result dplane_intf_addr_unset(const struct interface *ifp,
 366                                                 const struct connected *ifc);
 367
 368 /*
 369  * Enqueue evpn mac operations for the dataplane.
 370  */
 371 enum zebra_dplane_result dplane_mac_add(const struct interface *ifp,
 372                                         vlanid_t vid,
 373                                         const struct ethaddr *mac,
 374                                         struct in_addr vtep_ip,
 375                                         bool sticky);
 376
 377 enum zebra_dplane_result dplane_mac_del(const struct interface *ifp,
 378                                         vlanid_t vid,
 379                                         const struct ethaddr *mac,
 380                                         struct in_addr vtep_ip);
 381
 382 /* Retrieve the limit on the number of pending, unprocessed updates. */
 383 uint32_t dplane_get_in_queue_limit(void);
 384
 385 /* Configure limit on the number of pending, queued updates. If 'unset', reset
 386  * to default value.
 387  */
 388 void dplane_set_in_queue_limit(uint32_t limit, bool set);
 389
 390 /* Retrieve the current queue depth of incoming, unprocessed updates */
 391 uint32_t dplane_get_in_queue_len(void);
 392
 393 /*
 394  * Vty/cli apis
 395  */
 396 int dplane_show_helper(struct vty *vty, bool detailed);
 397 int dplane_show_provs_helper(struct vty *vty, bool detailed);
 398
 399 /*
 400  * Dataplane providers: modules that process or consume dataplane events.
 401  */
 402
 403 struct zebra_dplane_provider;
 404
 405 /* Support string name for a dataplane provider */
 406 #define DPLANE_PROVIDER_NAMELEN 64
 407
 408 /* Priority or ordering values for providers. The idea is that there may be
 409  * some pre-processing, followed by an external or remote dataplane,
 410  * followed by the kernel, followed by some post-processing step (such as
 411  * the fpm output stream.)
 412  */
 413 enum dplane_provider_prio {
 414         DPLANE_PRIO_NONE = 0,
 415         DPLANE_PRIO_PREPROCESS,
 416         DPLANE_PRIO_PRE_KERNEL,
 417         DPLANE_PRIO_KERNEL,
 418         DPLANE_PRIO_POSTPROCESS,
 419         DPLANE_PRIO_LAST
 420 };
 421
 422 /* Flags values used during provider registration. */
 423 #define DPLANE_PROV_FLAGS_DEFAULT  0x0
 424
 425 /* Provider will be spawning its own worker thread */
 426 #define DPLANE_PROV_FLAG_THREADED  0x1
 427
 428
 429 /* Provider registration: ordering or priority value, callbacks, and optional
 430  * opaque data value. If 'prov_p', return the newly-allocated provider object
 431  * on success.
 432  */
 433
 434 /* Providers offer an entry-point for incoming work, called in the context of
 435  * the dataplane pthread. The dataplane pthread enqueues any new work to the
 436  * provider's 'inbound' queue, then calls the callback. The dataplane
 437  * then checks the provider's outbound queue for completed work.
 438  */
 439
 440 /*
 441  * Providers can offer a 'start' callback; if present, the dataplane will
 442  * call it when it is starting - when its pthread and event-scheduling
 443  * thread_master are available.
 444  */
 445
 446 /* Providers can offer an entry-point for shutdown and cleanup. This is called
 447  * with 'early' during shutdown, to indicate that the dataplane subsystem
 448  * is allowing work to move through the providers and finish.
 449  * When called without 'early', the provider should release
 450  * all resources (if it has any allocated).
 451  */
 452 int dplane_provider_register(const char *name,
 453                              enum dplane_provider_prio prio,
 454                              int flags,
 455                              int (*start_fp)(struct zebra_dplane_provider *),
 456                              int (*fp)(struct zebra_dplane_provider *),
 457                              int (*fini_fp)(struct zebra_dplane_provider *,
 458                                             bool early),
 459                              void *data,
 460                              struct zebra_dplane_provider **prov_p);
 461
 462 /* Accessors for provider attributes */
 463 const char *dplane_provider_get_name(const struct zebra_dplane_provider *prov);
 464 uint32_t dplane_provider_get_id(const struct zebra_dplane_provider *prov);
 465 void *dplane_provider_get_data(const struct zebra_dplane_provider *prov);
 466 bool dplane_provider_is_threaded(const struct zebra_dplane_provider *prov);
 467
 468 /* Lock/unlock a provider's mutex - iff the provider was registered with
 469  * the THREADED flag.
 470  */
 471 void dplane_provider_lock(struct zebra_dplane_provider *prov);
 472 void dplane_provider_unlock(struct zebra_dplane_provider *prov);
 473
 474 /* Obtain thread_master for dataplane thread */
 475 struct thread_master *dplane_get_thread_master(void);
 476
 477 /* Providers should (generally) limit number of updates per work cycle */
 478 int dplane_provider_get_work_limit(const struct zebra_dplane_provider *prov);
 479
 480 /* Provider api to signal that work/events are available
 481  * for the dataplane pthread.
 482  */
 483 int dplane_provider_work_ready(void);
 484
 485 /* Dequeue, maintain associated counter and locking */
 486 struct zebra_dplane_ctx *dplane_provider_dequeue_in_ctx(
 487         struct zebra_dplane_provider *prov);
 488
 489 /* Dequeue work to a list, maintain counter and locking, return count */
 490 int dplane_provider_dequeue_in_list(struct zebra_dplane_provider *prov,
 491                                     struct dplane_ctx_q *listp);
 492
 493 /* Enqueue completed work, maintain associated counter and locking */
 494 void dplane_provider_enqueue_out_ctx(struct zebra_dplane_provider *prov,
 495                                      struct zebra_dplane_ctx *ctx);
 496
 497 /* Enqueue a context directly to zebra main. */
 498 void dplane_provider_enqueue_to_zebra(struct zebra_dplane_ctx *ctx);
 499
 500 /*
 501  * Initialize the dataplane modules at zebra startup. This is currently called
 502  * by the rib module. Zebra registers a results callback with the dataplane.
 503  * The callback is called in the dataplane pthread context,
 504  * so the expectation is that the contexts are queued for the zebra
 505  * main pthread.
 506  */
 507 void zebra_dplane_init(int (*) (struct dplane_ctx_q *));
 508
 509 /*
 510  * Start the dataplane pthread. This step needs to be run later than the
 511  * 'init' step, in case zebra has fork-ed.
 512  */
 513 void zebra_dplane_start(void);
 514
 515 /* Finalize/cleanup apis, one called early as shutdown is starting,
 516  * one called late at the end of zebra shutdown, and then one called
 517  * from the zebra main pthread to stop the dplane pthread and
 518  * free all resources.
 519  *
 520  * Zebra expects to try to clean up all vrfs and all routes during
 521  * shutdown, so the dplane must be available until very late.
 522  */
 523 void zebra_dplane_pre_finish(void);
 524 void zebra_dplane_finish(void);
 525 void zebra_dplane_shutdown(void);
 526
 527 #ifdef __cplusplus
 528 }
 529 #endif
 530
 531 #endif  /* _ZEBRA_DPLANE_H */