2 *------------------------------------------------------------------
5 * Copyright (c) 2009-2015 Cisco and/or its affiliates.
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *------------------------------------------------------------------
20 #ifndef included_api_common_h
21 #define included_api_common_h
23 /** \file API common definitions
24 * See api_doc.md for more info
27 #include <vppinfra/clib_error.h>
28 #include <vppinfra/elog.h>
29 #include <vlibapi/api_types.h>
30 #include <svm/svm_common.h>
31 #include <svm/queue.h>
33 /** API registration types
37 REGISTRATION_TYPE_FREE = 0,
38 REGISTRATION_TYPE_SHMEM, /**< Shared memory connection */
39 REGISTRATION_TYPE_SOCKET_LISTEN, /**< Socket listener */
40 REGISTRATION_TYPE_SOCKET_SERVER, /**< Socket server */
41 REGISTRATION_TYPE_SOCKET_CLIENT, /**< Socket client */
42 } vl_registration_type_t;
44 /** An API client registration, only in vpp/vlib */
46 typedef struct vl_api_registration_
48 vl_registration_type_t registration_type; /**< type */
50 /** Index in VLIB's brain (not shared memory). */
51 u32 vl_api_registration_pool_index;
53 u8 *name; /**< Client name */
55 /* Zombie apocalypse checking */
60 /** shared memory only: pointer to client input queue */
61 svm_queue_t *vl_input_queue;
62 svm_region_t *vlib_rp;
65 /* socket server and client */
66 u32 clib_file_index; /**< Socket only: file index */
67 i8 *unprocessed_input; /**< Socket only: pending input */
68 u32 unprocessed_msg_length; /**< Socket only: unprocssed length */
69 u8 *output_vector; /**< Socket only: output vector */
70 int *additional_fds_to_close;
72 /* socket client only */
73 u32 server_handle; /**< Socket client only: server handle */
74 u32 server_index; /**< Socket client only: server index */
75 } vl_api_registration_t;
77 #define VL_API_INVALID_FI ((u32)~0)
79 /** Trace configuration for a single message */
82 int size; /**< for sanity checking */
83 int trace_enable; /**< trace this message */
84 int replay_enable; /**< This message can be replayed */
92 u8 endian; /**< trace endianness */
93 u8 enabled; /**< trace is enabled */
94 u8 wrapped; /**< trace has wrapped */
96 u32 nitems; /**< Number of trace records */
97 u32 curindex; /**< Current index in circular buffer */
98 u8 **traces; /**< Trace ring */
101 /** Trace RX / TX enum */
106 } vl_api_trace_which_t;
108 #define VL_API_LITTLE_ENDIAN 0x00
109 #define VL_API_BIG_ENDIAN 0x01
111 /** Message range (belonging to a plugin) */
114 u8 *name; /**< name of the plugin */
115 u16 first_msg_id; /**< first assigned message ID */
116 u16 last_msg_id; /**< last assigned message ID */
117 } vl_api_msg_range_t;
119 /** Message configuration definition */
122 int id; /**< the message ID */
123 char *name; /**< the message name */
124 u32 crc; /**< message definition CRC */
125 void *handler; /**< the message handler */
126 void *cleanup; /**< non-default message cleanup handler */
127 void *endian; /**< message endian function */
128 void *print; /**< message print function */
129 int size; /**< message size */
130 int traced; /**< is this message to be traced? */
131 int replay; /**< is this message to be replayed? */
132 int message_bounce; /**< do not free message after processing */
133 int is_mp_safe; /**< worker thread barrier required? */
134 } vl_msg_api_msg_config_t;
136 /** Message header structure */
137 typedef struct msgbuf_
139 svm_queue_t *q; /**< message allocated in this shmem ring */
140 u32 data_len; /**< message length not including header */
141 u32 gc_mark_timestamp; /**< message garbage collector mark TS */
142 u8 data[0]; /**< actual message begins here */
145 CLIB_NOSANITIZE_ADDR static inline void
146 VL_MSG_API_UNPOISON (const void *a)
148 const msgbuf_t *m = &((const msgbuf_t *) a)[-1];
149 CLIB_MEM_UNPOISON (m, sizeof (*m) + ntohl (m->data_len));
152 CLIB_NOSANITIZE_ADDR static inline void
153 VL_MSG_API_SVM_QUEUE_UNPOISON (const svm_queue_t * q)
155 CLIB_MEM_UNPOISON (q, sizeof (*q) + q->elsize * q->maxsize);
159 VL_MSG_API_POISON (const void *a)
161 const msgbuf_t *m = &((const msgbuf_t *) a)[-1];
162 CLIB_MEM_POISON (m, sizeof (*m) + ntohl (m->data_len));
165 /* api_shared.c prototypes */
166 void vl_msg_api_handler (void *the_msg);
167 void vl_msg_api_handler_no_free (void *the_msg);
168 void vl_msg_api_handler_no_trace_no_free (void *the_msg);
169 void vl_msg_api_trace_only (void *the_msg);
170 void vl_msg_api_cleanup_handler (void *the_msg);
171 void vl_msg_api_replay_handler (void *the_msg);
172 void vl_msg_api_socket_handler (void *the_msg);
173 void vl_msg_api_set_handlers (int msg_id, char *msg_name,
177 void *print, int msg_size, int traced);
178 void vl_msg_api_clean_handlers (int msg_id);
179 void vl_msg_api_config (vl_msg_api_msg_config_t *);
180 void vl_msg_api_set_cleanup_handler (int msg_id, void *fp);
181 void vl_msg_api_queue_handler (svm_queue_t * q);
183 void vl_msg_api_barrier_sync (void) __attribute__ ((weak));
184 void vl_msg_api_barrier_release (void) __attribute__ ((weak));
185 #ifdef BARRIER_TRACING
186 void vl_msg_api_barrier_trace_context (const char *context)
187 __attribute__ ((weak));
189 #define vl_msg_api_barrier_trace_context(X)
191 void vl_msg_api_free (void *);
192 void vl_noop_handler (void *mp);
193 void vl_msg_api_increment_missing_client_counter (void);
194 void vl_msg_api_post_mortem_dump (void);
195 void vl_msg_api_post_mortem_dump_enable_disable (int enable);
196 void vl_msg_api_register_pd_handler (void *handler,
197 u16 msg_id_host_byte_order);
198 int vl_msg_api_pd_handler (void *mp, int rv);
200 void vl_msg_api_set_first_available_msg_id (u16 first_avail);
201 u16 vl_msg_api_get_msg_ids (const char *name, int n);
202 u32 vl_msg_api_get_msg_index (u8 * name_and_crc);
203 void *vl_msg_push_heap (void);
204 void *vl_msg_push_heap_w_region (svm_region_t * vlib_rp);
205 void vl_msg_pop_heap (void *oldheap);
206 void vl_msg_pop_heap_w_region (svm_region_t * vlib_rp, void *oldheap);
208 typedef clib_error_t *(vl_msg_api_init_function_t) (u32 client_index);
210 typedef struct _vl_msg_api_init_function_list_elt
212 struct _vl_msg_api_init_function_list_elt *next_init_function;
213 vl_msg_api_init_function_t *f;
214 } _vl_msg_api_function_list_elt_t;
224 /** API main structure, used by both vpp and binary API clients */
227 /** Message handler vector */
228 void (**msg_handlers) (void *);
229 /** Plaform-dependent (aka hardware) message handler vector */
230 int (**pd_msg_handlers) (void *, int);
232 /** non-default message cleanup handler vector */
233 void (**msg_cleanup_handlers) (void *);
235 /** Message endian handler vector */
236 void (**msg_endian_handlers) (void *);
238 /** Message print function vector */
239 void (**msg_print_handlers) (void *, void *);
241 /** Message name vector */
242 const char **msg_names;
244 /** Don't automatically free message buffer vetor */
247 /** Message is mp safe vector */
250 /** Allocator ring vectors (in shared memory) */
251 struct ring_alloc_ *arings;
253 /** Number of times that the ring allocator failed */
256 /** Number of garbage-collected message buffers */
257 u32 garbage_collects;
259 /** Number of missing clients / failed message sends */
262 /** Received message trace configuration */
263 vl_api_trace_t *rx_trace;
265 /** Sent message trace configuration */
266 vl_api_trace_t *tx_trace;
268 /** Print every received message */
271 /** Current trace configuration */
272 trace_cfg_t *api_trace_cfg;
274 /** Current process PID */
277 /** Current binary api segment descriptor */
278 svm_region_t *vlib_rp;
280 /** Primary api segment descriptor */
281 svm_region_t *vlib_primary_rp;
283 /** Vector of all mapped shared-VM segments */
284 svm_region_t **vlib_private_rps;
285 svm_region_t **mapped_shmem_regions;
287 /** Binary API shared-memory segment header pointer */
288 struct vl_shmem_hdr_ *shmem_hdr;
290 /** vlib/vpp only: vector of client registrations */
291 vl_api_registration_t **vl_clients;
293 /** vlib/vpp only: serialized (message, name, crc) table */
294 u8 *serialized_message_table_in_shmem;
296 /** First available message ID, for theplugin msg allocator */
297 u16 first_available_msg_id;
299 /** Message range by name hash */
300 uword *msg_range_by_name;
302 /** vector of message ranges */
303 vl_api_msg_range_t *msg_ranges;
305 /** uid for the api shared memory region */
308 /** gid for the api shared memory region */
311 /** base virtual address for global VM region */
314 /** size of the global VM region */
317 /** size of the API region */
320 /** size of the global VM private mheap */
321 u64 global_pvt_heap_size;
323 /** size of the api private mheap */
324 u64 api_pvt_heap_size;
326 /** Peer input queue pointer */
327 svm_queue_t *vl_input_queue;
330 * All VLIB-side message handlers use my_client_index to identify
331 * the queue / client. This works in sim replay.
335 * This is the (shared VM) address of the registration,
336 * don't use it to id the connection since it can't possibly
337 * work in simulator replay.
339 vl_api_registration_t *my_registration;
341 /** vpp/vlib input queue length */
342 u32 vlib_input_queue_length;
344 /** client message index hash table */
345 uword *msg_index_by_name_and_crc;
347 /** api version list */
348 api_version_t *api_version_list;
350 /** Shared VM binary API region name */
351 const char *region_name;
353 /** Chroot path to the shared memory API files */
354 const char *root_path;
356 /** Replay in progress? */
357 int replay_in_progress;
359 /** Dump (msg-name, crc) snapshot here at startup */
360 u8 *save_msg_table_filename;
362 /** List of API client reaper functions */
363 _vl_msg_api_function_list_elt_t *reaper_function_registrations;
365 /** Bin API thread handle */
366 pthread_t rx_thread_handle;
369 elog_main_t *elog_main;
370 int elog_trace_api_messages;
374 extern __thread api_main_t *my_api_main;
375 extern api_main_t api_global_main;
377 always_inline api_main_t *
378 vlibapi_get_main (void)
384 vlibapi_set_main (api_main_t * am)
389 #endif /* included_api_common_h */
392 * fd.io coding-style-patch-verification: ON
395 * eval: (c-set-style "gnu")