/* *------------------------------------------------------------------ * memory_client.c - API message handling, client code. * * Copyright (c) 2010 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. *------------------------------------------------------------------ */ #include <stdio.h> #include <stdlib.h> #include <setjmp.h> #include <sys/types.h> #include <sys/mman.h> #include <sys/stat.h> #include <netinet/in.h> #include <signal.h> #include <pthread.h> #include <unistd.h> #include <time.h> #include <fcntl.h> #include <string.h> #include <vppinfra/clib.h> #include <vppinfra/vec.h> #include <vppinfra/hash.h> #include <vppinfra/bitmap.h> #include <vppinfra/fifo.h> #include <vppinfra/time.h> #include <vppinfra/mheap.h> #include <vppinfra/heap.h> #include <vppinfra/pool.h> #include <vppinfra/format.h> #include <vlib/vlib.h> #include <vlib/unix/unix.h> #include <vlibmemory/api.h> #include <vlibmemory/vl_memory_msg_enum.h> #define vl_typedefs /* define message structures */ #include <vlibmemory/vl_memory_api_h.h> #undef vl_typedefs #define vl_endianfun /* define message structures */ #include <vlibmemory/vl_memory_api_h.h> #undef vl_endianfun /* instantiate all the print functions we know about */ #define vl_print(handle, ...) clib_warning (__VA_ARGS__) #define vl_printfun #include <vlibmemory/vl_memory_api_h.h> #undef vl_printfun typedef struct { u8 rx_thread_jmpbuf_valid; u8 connected_to_vlib; jmp_buf rx_thread_jmpbuf; pthread_t rx_thread_handle; /* Plugin message base lookup scheme */ volatile u8 first_msg_id_reply_ready; u16 first_msg_id_reply; } memory_client_main_t; memory_client_main_t memory_client_main; static void * rx_thread_fn (void *arg) { unix_shared_memory_queue_t *q; memory_client_main_t *mm = &memory_client_main; api_main_t *am = &api_main; q = am->vl_input_queue; /* So we can make the rx thread terminate cleanly */ if (setjmp (mm->rx_thread_jmpbuf) == 0) { mm->rx_thread_jmpbuf_valid = 1; while (1) { vl_msg_api_queue_handler (q); } } pthread_exit (0); } static void vl_api_rx_thread_exit_t_handler (vl_api_rx_thread_exit_t * mp) { memory_client_main_t *mm = &memory_client_main; vl_msg_api_free (mp); longjmp (mm->rx_thread_jmpbuf, 1); } static void noop_handler (void *notused) { } #define foreach_api_msg \ _(RX_THREAD_EXIT, rx_thread_exit) static int connect_to_vlib_internal (char *svm_name, char *client_name, int rx_queue_size, int want_pthread) { int rv = 0; memory_client_main_t *mm = &memory_client_main; if ((rv = vl_client_api_map (svm_name))) { clib_warning ("vl_client_api map rv %d", rv); return rv; } #define _(N,n) \ vl_msg_api_set_handlers(VL_API_##N, #n, \ vl_api_##n##_t_handler, \ noop_handler, \ vl_api_##n##_t_endian, \ vl_api_##n##_t_print, \ sizeof(vl_api_##n##_t), 1); foreach_api_msg; #undef _ if (vl_client_connect (client_name, 0 /* punt quota */ , rx_queue_size /* input queue */ ) < 0) { vl_client_api_unmap (); return -1; } /* Start the rx queue thread */ if (want_pthread) { rv = pthread_create (&mm->rx_thread_handle, NULL /*attr */ , rx_thread_fn, 0); if (rv) clib_warning ("pthread_create returned %d", rv); } mm->connected_to_vlib = 1; return 0; } int vl_client_connect_to_vlib (char *svm_name, char *client_name, int rx_queue_size) { return connect_to_vlib_internal (svm_name, client_name, rx_queue_size, 1 /* want pthread */ ); } int vl_client_connect_to_vlib_no_rx_pthread (char *svm_name, char *client_name, int rx_queue_size) { return connect_to_vlib_internal (svm_name, client_name, rx_queue_size, 0 /* want pthread */ ); } void vl_client_disconnect_from_vlib (void) { memory_client_main_t *mm = &memory_client_main; api_main_t *am = &api_main; uword junk; if (mm->rx_thread_jmpbuf_valid) { vl_api_rx_thread_exit_t *ep; ep = vl_msg_api_alloc (sizeof (*ep)); ep->_vl_msg_id = ntohs (VL_API_RX_THREAD_EXIT); vl_msg_api_send_shmem (am->vl_input_queue, (u8 *) & ep); pthread_join (mm->rx_thread_handle, (void **) &junk); } if (mm->connected_to_vlib) { vl_client_disconnect (); vl_client_api_unmap (); } memset (mm, 0, sizeof (*mm)); } static void vl_api_get_first_msg_id_reply_t_handler (vl_api_get_first_msg_id_reply_t * mp) { memory_client_main_t *mm = &memory_client_main; i32 retval = ntohl (mp->retval); mm->first_msg_id_reply = (retval >= 0) ? ntohs (mp->first_msg_id) : ~0; mm->first_msg_id_reply_ready = 1; } u16 vl_client_get_first_plugin_msg_id (char *plugin_name) { vl_api_get_first_msg_id_t *mp; api_main_t *am = &api_main; memory_client_main_t *mm = &memory_client_main; f64 timeout; void *old_handler; clib_time_t clib_time; u16 rv = ~0; if (strlen (plugin_name) + 1 > sizeof (mp->name)) return (rv); memset (&clib_time, 0, sizeof (clib_time)); clib_time_init (&clib_time); /* Push this plugin's first_msg_id_reply handler */ old_handler = am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY]; am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = (void *) vl_api_get_first_msg_id_reply_t_handler; /* Ask the data-plane for the message-ID base of the indicated plugin */ mm->first_msg_id_reply_ready = 0; mp = vl_msg_api_alloc (sizeof (*mp)); memset (mp, 0, sizeof (*mp)); mp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID); mp->client_index = am->my_client_index; strncpy ((char *) mp->name, plugin_name, sizeof (mp->name) - 1); vl_msg_api_send_shmem (am->shmem_hdr->vl_input_queue, (u8 *) & mp); /* Synchronously wait for the answer */ do { timeout = clib_time_now (&clib_time) + 1.0; while (clib_time_now (&clib_time) < timeout) { if (mm->first_msg_id_reply_ready == 1) { rv = mm->first_msg_id_reply; goto result; } } /* Restore old handler */ am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler; return rv; } while (0); result: /* Restore the old handler */ am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler; if (rv == (u16) ~ 0) clib_warning ("plugin '%s' not registered", plugin_name); return rv; } void vlib_node_sync_stats (vlib_main_t * vm, vlib_node_t * n) { clib_warning ("STUB called..."); } /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */