Refactor API message handling code

This is preparation for new C API. Moving common stuff to separate
headers reduces dependency issues.

Change-Id: Ie7adb23398de72448e5eba6c1c1da4e1bc678725
Signed-off-by: Klement Sekera <ksekera@cisco.com>
(cherry picked from commit 58eb866b15a45514dc356170f28640d6c9db8034)

2 files changed, 293 insertions, 255 deletions

diff --git a/src/vlibapi/api.h b/src/vlibapi/api.h
index 0e2c2101ebb..49f5d5fb085 100644
--- a/src/vlibapi/api.h
+++ b/src/vlibapi/api.h
@@ -20,73 +20,13 @@
 #ifndef included_api_h
 #define included_api_h
 
+#include <stddef.h>
 #include <vppinfra/error.h>
 #include <svm/svm.h>
 #include <vlib/vlib.h>
 #include <vlibmemory/unix_shared_memory_queue.h>
 #include <vlib/unix/unix.h>
-#include <stddef.h>
-
-typedef enum
-{
-  REGISTRATION_TYPE_FREE = 0,
-  REGISTRATION_TYPE_SHMEM,
-  REGISTRATION_TYPE_SOCKET_LISTEN,
-  REGISTRATION_TYPE_SOCKET_SERVER,
-  REGISTRATION_TYPE_SOCKET_CLIENT,
-} vl_registration_type_t;
-
-typedef struct vl_api_registration_
-{
-  vl_registration_type_t registration_type;
-
-  /* Index in VLIB's brain (not shared memory). */
-  u32 vl_api_registration_pool_index;
-
-  u8 *name;
-
-  /*
-   * The following groups of data could be unioned, but my fingers are
-   * going to be sore enough.
-   */
-
-  /* shared memory only */
-  unix_shared_memory_queue_t *vl_input_queue;
-
-  /* socket server and client */
-  u32 unix_file_index;
-  i8 *unprocessed_input;
-  u32 unprocessed_msg_length;
-  u8 *output_vector;
-
-  /* socket client only */
-  u32 server_handle;
-  u32 server_index;
-
-} vl_api_registration_t;
-
-
-/* Trace configuration for a single message */
-typedef struct
-{
-  int size;
-  int trace_enable;
-  int replay_enable;
-} trace_cfg_t;
-
-/*
- * API recording
- */
-typedef struct
-{
-  u8 endian;
-  u8 enabled;
-  u8 wrapped;
-  u8 pad;
-  u32 nitems;
-  u32 curindex;
-  u8 **traces;
-} vl_api_trace_t;
+#include <vlibapi/api_common.h>
 
 /* *INDENT-OFF* */
 typedef CLIB_PACKED
@@ -97,200 +37,8 @@ typedef CLIB_PACKED
 }) vl_api_trace_file_header_t;
 /* *INDENT-ON* */
 
-typedef enum
-{
-  VL_API_TRACE_TX,
-  VL_API_TRACE_RX,
-} vl_api_trace_which_t;
-
-#define VL_API_LITTLE_ENDIAN 0x00
-#define VL_API_BIG_ENDIAN 0x01
-
-typedef struct
-{
-  u8 *name;
-  u16 first_msg_id;
-  u16 last_msg_id;
-} vl_api_msg_range_t;
-
-typedef clib_error_t *(vl_msg_api_init_function_t) (u32 client_index);
-
-typedef struct _vl_msg_api_init_function_list_elt
-{
-  struct _vl_msg_api_init_function_list_elt *next_init_function;
-  vl_msg_api_init_function_t *f;
-} _vl_msg_api_function_list_elt_t;
-
-typedef struct
-{
-  void (**msg_handlers) (void *);
-  int (**pd_msg_handlers) (void *, int);
-  void (**msg_cleanup_handlers) (void *);
-  void (**msg_endian_handlers) (void *);
-  void (**msg_print_handlers) (void *, void *);
-  const char **msg_names;
-  u8 *message_bounce;
-  u8 *is_mp_safe;
-  struct ring_alloc_ *arings;
-  u32 ring_misses;
-  u32 garbage_collects;
-  u32 missing_clients;
-  vl_api_trace_t *rx_trace;
-  vl_api_trace_t *tx_trace;
-  int msg_print_flag;
-  trace_cfg_t *api_trace_cfg;
-  int our_pid;
-  svm_region_t *vlib_rp;
-  svm_region_t **mapped_shmem_regions;
-  struct vl_shmem_hdr_ *shmem_hdr;
-  vl_api_registration_t **vl_clients;
-
-  u8 *serialized_message_table_in_shmem;
-
-  /* For plugin msg allocator */
-  u16 first_available_msg_id;
-
-  /* message range by name hash */
-  uword *msg_range_by_name;
-
-  /* vector of message ranges */
-  vl_api_msg_range_t *msg_ranges;
-
-  /* uid for the api shared memory region */
-  int api_uid;
-  /* gid for the api shared memory region */
-  int api_gid;
-
-  /* base virtual address for global VM region */
-  u64 global_baseva;
-
-  /* size of the global VM region */
-  u64 global_size;
-
-  /* size of the API region */
-  u64 api_size;
-
-  /* size of the global VM private mheap */
-  u64 global_pvt_heap_size;
-
-  /* size of the api private mheap */
-  u64 api_pvt_heap_size;
-
-  /* Client-only data structures */
-  unix_shared_memory_queue_t *vl_input_queue;
-
-  /*
-   * All VLIB-side message handlers use my_client_index to identify
-   * the queue / client. This works in sim replay.
-   */
-  int my_client_index;
-  /*
-   * This is the (shared VM) address of the registration,
-   * don't use it to id the connection since it can't possibly
-   * work in simulator replay.
-   */
-  vl_api_registration_t *my_registration;
-
-  i32 vlib_signal;
-
-  /* vlib input queue length */
-  u32 vlib_input_queue_length;
-
-  /* client side message index hash table */
-  uword *msg_index_by_name_and_crc;
-
-  const char *region_name;
-  const char *root_path;
-
-  /* Replay in progress? */
-  int replay_in_progress;
-
-  /* List of API client reaper functions */
-  _vl_msg_api_function_list_elt_t *reaper_function_registrations;
-
-} api_main_t;
-
-extern api_main_t api_main;
-
-typedef struct
-{
-  int id;
-  char *name;
-  u32 crc;
-  void *handler;
-  void *cleanup;
-  void *endian;
-  void *print;
-  int size;
-  int traced;
-  int replay;
-  int message_bounce;
-  int is_mp_safe;
-} vl_msg_api_msg_config_t;
-
-typedef struct msgbuf_
-{
-  unix_shared_memory_queue_t *q;
-  u32 data_len;
-  u32 gc_mark_timestamp;
-  u8 data[0];
-} msgbuf_t;
-
-/* api_shared.c prototypes */
-int vl_msg_api_rx_trace_enabled (api_main_t * am);
-int vl_msg_api_tx_trace_enabled (api_main_t * am);
-void vl_msg_api_trace (api_main_t * am, vl_api_trace_t * tp, void *msg);
-int vl_msg_api_trace_onoff (api_main_t * am, vl_api_trace_which_t which,
-			    int onoff);
-int vl_msg_api_trace_free (api_main_t * am, vl_api_trace_which_t which);
 int vl_msg_api_trace_save (api_main_t * am,
 			   vl_api_trace_which_t which, FILE * fp);
-int vl_msg_api_trace_configure (api_main_t * am, vl_api_trace_which_t which,
-				u32 nitems);
-void vl_msg_api_handler_with_vm_node (api_main_t * am,
-				      void *the_msg, vlib_main_t * vm,
-				      vlib_node_runtime_t * node);
-void vl_msg_api_handler (void *the_msg);
-void vl_msg_api_handler_no_free (void *the_msg);
-void vl_msg_api_handler_no_trace_no_free (void *the_msg);
-void vl_msg_api_trace_only (void *the_msg);
-void vl_msg_api_cleanup_handler (void *the_msg);
-void vl_msg_api_replay_handler (void *the_msg);
-void vl_msg_api_socket_handler (void *the_msg);
-void vl_msg_api_set_handlers (int msg_id, char *msg_name,
-			      void *handler,
-			      void *cleanup,
-			      void *endian,
-			      void *print, int msg_size, int traced);
-void vl_msg_api_config (vl_msg_api_msg_config_t *);
-void vl_msg_api_set_cleanup_handler (int msg_id, void *fp);
-void vl_msg_api_queue_handler (unix_shared_memory_queue_t * q);
-vl_api_trace_t *vl_msg_api_trace_get (api_main_t * am,
-				      vl_api_trace_which_t which);
-
-void vl_msg_api_barrier_sync (void) __attribute__ ((weak));
-void vl_msg_api_barrier_release (void) __attribute__ ((weak));
-void vl_msg_api_free (void *);
-void vl_noop_handler (void *mp);
-void vl_msg_api_increment_missing_client_counter (void);
-void vl_msg_api_post_mortem_dump (void);
-void vl_msg_api_post_mortem_dump_enable_disable (int enable);
-void vl_msg_api_register_pd_handler (void *handler,
-				     u16 msg_id_host_byte_order);
-int vl_msg_api_pd_handler (void *mp, int rv);
-
-void vl_msg_api_set_first_available_msg_id (u16 first_avail);
-u16 vl_msg_api_get_msg_ids (const char *name, int n);
-void vl_msg_api_add_msg_name_crc (api_main_t * am, const char *string,
-				  u32 id);
-u32 vl_api_get_msg_index (u8 * name_and_crc);
-u32 vl_msg_api_get_msg_length (void *msg_arg);
-
-/* node_serialize.c prototypes */
-u8 *vlib_node_serialize (vlib_node_main_t * nm, u8 * vector,
-			 u32 max_threads, int include_nexts,
-			 int include_stats);
-vlib_node_t **vlib_node_unserialize (u8 * vector);
 
 #define VLIB_API_INIT_FUNCTION(x) VLIB_DECLARE_INIT_FUNCTION(x,api_init)
 
@@ -350,8 +98,30 @@ vl_msg_api_get_msg_length_inline (void *msg_arg)
 
   return clib_net_to_host_u32 (header->data_len);
 }
-#endif /* included_api_h */
 
+int vl_msg_api_rx_trace_enabled (api_main_t * am);
+int vl_msg_api_tx_trace_enabled (api_main_t * am);
+void vl_msg_api_trace (api_main_t * am, vl_api_trace_t * tp, void *msg);
+int vl_msg_api_trace_onoff (api_main_t * am, vl_api_trace_which_t which,
+			    int onoff);
+int vl_msg_api_trace_free (api_main_t * am, vl_api_trace_which_t which);
+int vl_msg_api_trace_configure (api_main_t * am, vl_api_trace_which_t which,
+				u32 nitems);
+void vl_msg_api_handler_with_vm_node (api_main_t * am,
+				      void *the_msg, vlib_main_t * vm,
+				      vlib_node_runtime_t * node);
+vl_api_trace_t *vl_msg_api_trace_get (api_main_t * am,
+				      vl_api_trace_which_t which);
+void vl_msg_api_add_msg_name_crc (api_main_t * am, const char *string,
+				  u32 id);
+/* node_serialize.c prototypes */
+u8 *vlib_node_serialize (vlib_node_main_t * nm, u8 * vector,
+			 u32 max_threads, int include_nexts,
+			 int include_stats);
+vlib_node_t **vlib_node_unserialize (u8 * vector);
+u32 vl_msg_api_get_msg_length (void *msg_arg);
+
+#endif /* included_api_h */
 /*
  * fd.io coding-style-patch-verification: ON
  *
diff --git a/src/vlibapi/api_common.h b/src/vlibapi/api_common.h
new file mode 100644
index 00000000000..b84d269e80c
--- /dev/null
+++ b/src/vlibapi/api_common.h
@@ -0,0 +1,268 @@
+/*
+ *------------------------------------------------------------------
+ * api_common.h
+ *
+ * Copyright (c) 2009-2015 Cisco and/or its affiliates.
+ * 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.
+ *------------------------------------------------------------------
+ */
+
+#ifndef included_api_common_h
+#define included_api_common_h
+
+#include <vppinfra/clib_error.h>
+#include <svm/svm_common.h>
+#include <vlibmemory/unix_shared_memory_queue.h>
+
+typedef enum
+{
+  REGISTRATION_TYPE_FREE = 0,
+  REGISTRATION_TYPE_SHMEM,
+  REGISTRATION_TYPE_SOCKET_LISTEN,
+  REGISTRATION_TYPE_SOCKET_SERVER,
+  REGISTRATION_TYPE_SOCKET_CLIENT,
+} vl_registration_type_t;
+
+typedef struct vl_api_registration_
+{
+  vl_registration_type_t registration_type;
+
+  /* Index in VLIB's brain (not shared memory). */
+  u32 vl_api_registration_pool_index;
+
+  u8 *name;
+
+  /*
+   * The following groups of data could be unioned, but my fingers are
+   * going to be sore enough.
+   */
+
+  /* shared memory only */
+  unix_shared_memory_queue_t *vl_input_queue;
+
+  /* socket server and client */
+  u32 unix_file_index;
+  i8 *unprocessed_input;
+  u32 unprocessed_msg_length;
+  u8 *output_vector;
+
+  /* socket client only */
+  u32 server_handle;
+  u32 server_index;
+
+} vl_api_registration_t;
+
+
+/* Trace configuration for a single message */
+typedef struct
+{
+  int size;
+  int trace_enable;
+  int replay_enable;
+} trace_cfg_t;
+
+/*
+ * API recording
+ */
+typedef struct
+{
+  u8 endian;
+  u8 enabled;
+  u8 wrapped;
+  u8 pad;
+  u32 nitems;
+  u32 curindex;
+  u8 **traces;
+} vl_api_trace_t;
+
+typedef enum
+{
+  VL_API_TRACE_TX,
+  VL_API_TRACE_RX,
+} vl_api_trace_which_t;
+
+#define VL_API_LITTLE_ENDIAN 0x00
+#define VL_API_BIG_ENDIAN 0x01
+
+typedef struct
+{
+  u8 *name;
+  u16 first_msg_id;
+  u16 last_msg_id;
+} vl_api_msg_range_t;
+
+typedef struct
+{
+  int id;
+  char *name;
+  u32 crc;
+  void *handler;
+  void *cleanup;
+  void *endian;
+  void *print;
+  int size;
+  int traced;
+  int replay;
+  int message_bounce;
+  int is_mp_safe;
+} vl_msg_api_msg_config_t;
+
+typedef struct msgbuf_
+{
+  unix_shared_memory_queue_t *q;
+  u32 data_len;
+  u32 gc_mark_timestamp;
+  u8 data[0];
+} msgbuf_t;
+
+/* api_shared.c prototypes */
+void vl_msg_api_handler (void *the_msg);
+void vl_msg_api_handler_no_free (void *the_msg);
+void vl_msg_api_handler_no_trace_no_free (void *the_msg);
+void vl_msg_api_trace_only (void *the_msg);
+void vl_msg_api_cleanup_handler (void *the_msg);
+void vl_msg_api_replay_handler (void *the_msg);
+void vl_msg_api_socket_handler (void *the_msg);
+void vl_msg_api_set_handlers (int msg_id, char *msg_name,
+			      void *handler,
+			      void *cleanup,
+			      void *endian,
+			      void *print, int msg_size, int traced);
+void vl_msg_api_config (vl_msg_api_msg_config_t *);
+void vl_msg_api_set_cleanup_handler (int msg_id, void *fp);
+void vl_msg_api_queue_handler (unix_shared_memory_queue_t * q);
+
+void vl_msg_api_barrier_sync (void) __attribute__ ((weak));
+void vl_msg_api_barrier_release (void) __attribute__ ((weak));
+void vl_msg_api_free (void *);
+void vl_noop_handler (void *mp);
+void vl_msg_api_increment_missing_client_counter (void);
+void vl_msg_api_post_mortem_dump (void);
+void vl_msg_api_post_mortem_dump_enable_disable (int enable);
+void vl_msg_api_register_pd_handler (void *handler,
+				     u16 msg_id_host_byte_order);
+int vl_msg_api_pd_handler (void *mp, int rv);
+
+void vl_msg_api_set_first_available_msg_id (u16 first_avail);
+u16 vl_msg_api_get_msg_ids (const char *name, int n);
+u32 vl_api_get_msg_index (u8 * name_and_crc);
+
+typedef clib_error_t *(vl_msg_api_init_function_t) (u32 client_index);
+
+typedef struct _vl_msg_api_init_function_list_elt
+{
+  struct _vl_msg_api_init_function_list_elt *next_init_function;
+  vl_msg_api_init_function_t *f;
+} _vl_msg_api_function_list_elt_t;
+
+typedef struct
+{
+  void (**msg_handlers) (void *);
+  int (**pd_msg_handlers) (void *, int);
+  void (**msg_cleanup_handlers) (void *);
+  void (**msg_endian_handlers) (void *);
+  void (**msg_print_handlers) (void *, void *);
+  const char **msg_names;
+  u8 *message_bounce;
+  u8 *is_mp_safe;
+  struct ring_alloc_ *arings;
+  u32 ring_misses;
+  u32 garbage_collects;
+  u32 missing_clients;
+  vl_api_trace_t *rx_trace;
+  vl_api_trace_t *tx_trace;
+  int msg_print_flag;
+  trace_cfg_t *api_trace_cfg;
+  int our_pid;
+  svm_region_t *vlib_rp;
+  svm_region_t **mapped_shmem_regions;
+  struct vl_shmem_hdr_ *shmem_hdr;
+  vl_api_registration_t **vl_clients;
+
+  u8 *serialized_message_table_in_shmem;
+
+  /* For plugin msg allocator */
+  u16 first_available_msg_id;
+
+  /* message range by name hash */
+  uword *msg_range_by_name;
+
+  /* vector of message ranges */
+  vl_api_msg_range_t *msg_ranges;
+
+  /* uid for the api shared memory region */
+  int api_uid;
+  /* gid for the api shared memory region */
+  int api_gid;
+
+  /* base virtual address for global VM region */
+  u64 global_baseva;
+
+  /* size of the global VM region */
+  u64 global_size;
+
+  /* size of the API region */
+  u64 api_size;
+
+  /* size of the global VM private mheap */
+  u64 global_pvt_heap_size;
+
+  /* size of the api private mheap */
+  u64 api_pvt_heap_size;
+
+  /* Client-only data structures */
+  unix_shared_memory_queue_t *vl_input_queue;
+
+  /*
+   * All VLIB-side message handlers use my_client_index to identify
+   * the queue / client. This works in sim replay.
+   */
+  int my_client_index;
+  /*
+   * This is the (shared VM) address of the registration,
+   * don't use it to id the connection since it can't possibly
+   * work in simulator replay.
+   */
+  vl_api_registration_t *my_registration;
+
+  i32 vlib_signal;
+
+  /* vlib input queue length */
+  u32 vlib_input_queue_length;
+
+  /* client side message index hash table */
+  uword *msg_index_by_name_and_crc;
+
+  const char *region_name;
+  const char *root_path;
+
+  /* Replay in progress? */
+  int replay_in_progress;
+
+  /* List of API client reaper functions */
+  _vl_msg_api_function_list_elt_t *reaper_function_registrations;
+
+} api_main_t;
+
+extern api_main_t api_main;
+
+
+#endif /* included_api_common_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */