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 <svm/svm_common.h>
29 #include <svm/queue.h>
31 /** API registration types
35 REGISTRATION_TYPE_FREE = 0,
36 REGISTRATION_TYPE_SHMEM, /**< Shared memory connection */
37 REGISTRATION_TYPE_SOCKET_LISTEN, /**< Socket listener */
38 REGISTRATION_TYPE_SOCKET_SERVER, /**< Socket server */
39 REGISTRATION_TYPE_SOCKET_CLIENT, /**< Socket client */
40 } vl_registration_type_t;
42 /** An API client registration, only in vpp/vlib */
44 typedef struct vl_api_registration_
46 vl_registration_type_t registration_type; /**< type */
48 /** Index in VLIB's brain (not shared memory). */
49 u32 vl_api_registration_pool_index;
51 u8 *name; /**< Client name */
53 /* Zombie apocalypse checking */
58 /** shared memory only: pointer to client input queue */
59 svm_queue_t *vl_input_queue;
60 svm_region_t *vlib_rp;
63 /* socket server and client */
64 u32 clib_file_index; /**< Socket only: file index */
65 i8 *unprocessed_input; /**< Socket only: pending input */
66 u32 unprocessed_msg_length; /**< Socket only: unprocssed length */
67 u8 *output_vector; /**< Socket only: output vecto */
68 int *additional_fds_to_close;
70 /* socket client only */
71 u32 server_handle; /**< Socket client only: server handle */
72 u32 server_index; /**< Socket client only: server index */
73 } vl_api_registration_t;
75 #define VL_API_INVALID_FI ((u32)~0)
77 /** Trace configuration for a single message */
80 int size; /**< for sanity checking */
81 int trace_enable; /**< trace this message */
82 int replay_enable; /**< This message can be replayed */
90 u8 endian; /**< trace endianness */
91 u8 enabled; /**< trace is enabled */
92 u8 wrapped; /**< trace has wrapped */
94 u32 nitems; /**< Number of trace records */
95 u32 curindex; /**< Current index in circular buffer */
96 u8 **traces; /**< Trace ring */
99 /** Trace RX / TX enum */
104 } vl_api_trace_which_t;
106 #define VL_API_LITTLE_ENDIAN 0x00
107 #define VL_API_BIG_ENDIAN 0x01
109 /** Message range (belonging to a plugin) */
112 u8 *name; /**< name of the plugin */
113 u16 first_msg_id; /**< first assigned message ID */
114 u16 last_msg_id; /**< last assigned message ID */
115 } vl_api_msg_range_t;
117 /** Message configuration definition */
120 int id; /**< the message ID */
121 char *name; /**< the message name */
122 u32 crc; /**< message definition CRC */
123 void *handler; /**< the message handler */
124 void *cleanup; /**< non-default message cleanup handler */
125 void *endian; /**< message endian function */
126 void *print; /**< message print function */
127 int size; /**< message size */
128 int traced; /**< is this message to be traced? */
129 int replay; /**< is this message to be replayed? */
130 int message_bounce; /**< do not free message after processing */
131 int is_mp_safe; /**< worker thread barrier required? */
132 } vl_msg_api_msg_config_t;
134 /** Message header structure */
135 typedef struct msgbuf_
137 svm_queue_t *q; /**< message allocated in this shmem ring */
138 u32 data_len; /**< message length not including header */
139 u32 gc_mark_timestamp; /**< message garbage collector mark TS */
140 u8 data[0]; /**< actual message begins here */
143 /* api_shared.c prototypes */
144 void vl_msg_api_handler (void *the_msg);
145 void vl_msg_api_handler_no_free (void *the_msg);
146 void vl_msg_api_handler_no_trace_no_free (void *the_msg);
147 void vl_msg_api_trace_only (void *the_msg);
148 void vl_msg_api_cleanup_handler (void *the_msg);
149 void vl_msg_api_replay_handler (void *the_msg);
150 void vl_msg_api_socket_handler (void *the_msg);
151 void vl_msg_api_set_handlers (int msg_id, char *msg_name,
155 void *print, int msg_size, int traced);
156 void vl_msg_api_clean_handlers (int msg_id);
157 void vl_msg_api_config (vl_msg_api_msg_config_t *);
158 void vl_msg_api_set_cleanup_handler (int msg_id, void *fp);
159 void vl_msg_api_queue_handler (svm_queue_t * q);
161 void vl_msg_api_barrier_sync (void) __attribute__ ((weak));
162 void vl_msg_api_barrier_release (void) __attribute__ ((weak));
163 #ifdef BARRIER_TRACING
164 void vl_msg_api_barrier_trace_context (const char *context)
165 __attribute__ ((weak));
167 #define vl_msg_api_barrier_trace_context(X)
169 void vl_msg_api_free (void *);
170 void vl_noop_handler (void *mp);
171 void vl_msg_api_increment_missing_client_counter (void);
172 void vl_msg_api_post_mortem_dump (void);
173 void vl_msg_api_post_mortem_dump_enable_disable (int enable);
174 void vl_msg_api_register_pd_handler (void *handler,
175 u16 msg_id_host_byte_order);
176 int vl_msg_api_pd_handler (void *mp, int rv);
178 void vl_msg_api_set_first_available_msg_id (u16 first_avail);
179 u16 vl_msg_api_get_msg_ids (const char *name, int n);
180 u32 vl_msg_api_get_msg_index (u8 * name_and_crc);
181 void *vl_msg_push_heap (void);
182 void vl_msg_pop_heap (void *oldheap);
184 typedef clib_error_t *(vl_msg_api_init_function_t) (u32 client_index);
186 typedef struct _vl_msg_api_init_function_list_elt
188 struct _vl_msg_api_init_function_list_elt *next_init_function;
189 vl_msg_api_init_function_t *f;
190 } _vl_msg_api_function_list_elt_t;
200 /** API main structure, used by both vpp and binary API clients */
203 /** Message handler vector */
204 void (**msg_handlers) (void *);
205 /** Plaform-dependent (aka hardware) message handler vector */
206 int (**pd_msg_handlers) (void *, int);
208 /** non-default message cleanup handler vector */
209 void (**msg_cleanup_handlers) (void *);
211 /** Message endian handler vector */
212 void (**msg_endian_handlers) (void *);
214 /** Message print function vector */
215 void (**msg_print_handlers) (void *, void *);
217 /** Message name vector */
218 const char **msg_names;
220 /** Don't automatically free message buffer vetor */
223 /** Message is mp safe vector */
226 /** Allocator ring vectors (in shared memory) */
227 struct ring_alloc_ *arings;
229 /** Number of times that the ring allocator failed */
232 /** Number of garbage-collected message buffers */
233 u32 garbage_collects;
235 /** Number of missing clients / failed message sends */
238 /** Received message trace configuration */
239 vl_api_trace_t *rx_trace;
241 /** Sent message trace configuration */
242 vl_api_trace_t *tx_trace;
244 /** Print every received message */
247 /** Current trace configuration */
248 trace_cfg_t *api_trace_cfg;
250 /** Current process PID */
253 /** Current binary api segment descriptor */
254 svm_region_t *vlib_rp;
256 /** Primary api segment descriptor */
257 svm_region_t *vlib_primary_rp;
259 /** Vector of all mapped shared-VM segments */
260 svm_region_t **vlib_private_rps;
261 svm_region_t **mapped_shmem_regions;
263 /** Binary API shared-memory segment header pointer */
264 struct vl_shmem_hdr_ *shmem_hdr;
266 /** vlib/vpp only: vector of client registrations */
267 vl_api_registration_t **vl_clients;
269 /** vlib/vpp only: serialized (message, name, crc) table */
270 u8 *serialized_message_table_in_shmem;
272 /** First available message ID, for theplugin msg allocator */
273 u16 first_available_msg_id;
275 /** Message range by name hash */
276 uword *msg_range_by_name;
278 /** vector of message ranges */
279 vl_api_msg_range_t *msg_ranges;
281 /** uid for the api shared memory region */
284 /** gid for the api shared memory region */
287 /** base virtual address for global VM region */
290 /** size of the global VM region */
293 /** size of the API region */
296 /** size of the global VM private mheap */
297 u64 global_pvt_heap_size;
299 /** size of the api private mheap */
300 u64 api_pvt_heap_size;
302 /** Peer input queue pointer */
303 svm_queue_t *vl_input_queue;
306 * All VLIB-side message handlers use my_client_index to identify
307 * the queue / client. This works in sim replay.
311 * This is the (shared VM) address of the registration,
312 * don't use it to id the connection since it can't possibly
313 * work in simulator replay.
315 vl_api_registration_t *my_registration;
317 /** (Historical) signal-based queue non-empty signal, to be removed */
320 /** vpp/vlib input queue length */
321 u32 vlib_input_queue_length;
323 /** client message index hash table */
324 uword *msg_index_by_name_and_crc;
326 /** api version list */
327 api_version_t *api_version_list;
329 /** Shared VM binary API region name */
330 const char *region_name;
332 /** Chroot path to the shared memory API files */
333 const char *root_path;
335 /** Replay in progress? */
336 int replay_in_progress;
338 /** Dump (msg-name, crc) snapshot here at startup */
339 u8 *save_msg_table_filename;
341 /** List of API client reaper functions */
342 _vl_msg_api_function_list_elt_t *reaper_function_registrations;
346 extern api_main_t api_main;
348 #endif /* included_api_common_h */
351 * fd.io coding-style-patch-verification: ON
354 * eval: (c-set-style "gnu")