From 248210c6ca1716ee2c5e6c974051218930fa4c26 Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Tue, 14 Sep 2021 18:54:45 -0700 Subject: misc: move part of vpe apis to vlibmemory VPE apis are actually vlib apis. This moves those that are not tightly coupled with vapi to vlib_api Type: refactor Signed-off-by: Florin Coras Change-Id: I456a64ce49a0cdeff4a0931c6ea513cb639f683e Signed-off-by: Ole Troan --- src/vlibmemory/memclnt_api.c | 719 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 719 insertions(+) create mode 100644 src/vlibmemory/memclnt_api.c (limited to 'src/vlibmemory/memclnt_api.c') diff --git a/src/vlibmemory/memclnt_api.c b/src/vlibmemory/memclnt_api.c new file mode 100644 index 00000000000..5ebc31f71dc --- /dev/null +++ b/src/vlibmemory/memclnt_api.c @@ -0,0 +1,719 @@ +/* + *------------------------------------------------------------------ + * memclnt_api.c VLIB API implementation + * + * Copyright (c) 2009 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/** + * @file + * @brief Binary API messaging via shared memory + * Low-level, primary provisioning interface + */ +/*? %%clicmd:group_label Binary API CLI %% ?*/ +/*? %%syscfg:group_label Binary API configuration %% ?*/ + +#define TRACE_VLIB_MEMORY_QUEUE 0 + +#include /* enumerate all vlib messages */ + +#define vl_typedefs /* define message structures */ +#include +#undef vl_typedefs + +/* instantiate all the print functions we know about */ +#define vl_print(handle, ...) vlib_cli_output (handle, __VA_ARGS__) +#define vl_printfun +#include +#undef vl_printfun + +static inline void * +vl_api_trace_plugin_msg_ids_t_print (vl_api_trace_plugin_msg_ids_t *a, + void *handle) +{ + vl_print (handle, "vl_api_trace_plugin_msg_ids: %s first %u last %u\n", + a->plugin_name, clib_host_to_net_u16 (a->first_msg_id), + clib_host_to_net_u16 (a->last_msg_id)); + return handle; +} + +/* instantiate all the endian swap functions we know about */ +#define vl_endianfun +#include +#undef vl_endianfun + +static void +vl_api_get_first_msg_id_t_handler (vl_api_get_first_msg_id_t *mp) +{ + vl_api_get_first_msg_id_reply_t *rmp; + vl_api_registration_t *regp; + uword *p; + api_main_t *am = vlibapi_get_main (); + vl_api_msg_range_t *rp; + u8 name[64]; + u16 first_msg_id = ~0; + int rv = -7; /* VNET_API_ERROR_INVALID_VALUE */ + + regp = vl_api_client_index_to_registration (mp->client_index); + if (!regp) + return; + + if (am->msg_range_by_name == 0) + goto out; + strncpy ((char *) name, (char *) mp->name, ARRAY_LEN (name)); + name[ARRAY_LEN (name) - 1] = '\0'; + p = hash_get_mem (am->msg_range_by_name, name); + if (p == 0) + goto out; + + rp = vec_elt_at_index (am->msg_ranges, p[0]); + first_msg_id = rp->first_msg_id; + rv = 0; + +out: + rmp = vl_msg_api_alloc (sizeof (*rmp)); + rmp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID_REPLY); + rmp->context = mp->context; + rmp->retval = ntohl (rv); + rmp->first_msg_id = ntohs (first_msg_id); + vl_api_send_msg (regp, (u8 *) rmp); +} + +void +vl_api_api_versions_t_handler (vl_api_api_versions_t *mp) +{ + api_main_t *am = vlibapi_get_main (); + vl_api_api_versions_reply_t *rmp; + vl_api_registration_t *reg; + u32 nmsg = vec_len (am->api_version_list); + int msg_size = sizeof (*rmp) + sizeof (rmp->api_versions[0]) * nmsg; + int i; + + reg = vl_api_client_index_to_registration (mp->client_index); + if (!reg) + return; + + rmp = vl_msg_api_alloc (msg_size); + clib_memset (rmp, 0, msg_size); + rmp->_vl_msg_id = ntohs (VL_API_API_VERSIONS_REPLY); + + /* fill in the message */ + rmp->context = mp->context; + rmp->count = htonl (nmsg); + + for (i = 0; i < nmsg; ++i) + { + api_version_t *vl = &am->api_version_list[i]; + rmp->api_versions[i].major = htonl (vl->major); + rmp->api_versions[i].minor = htonl (vl->minor); + rmp->api_versions[i].patch = htonl (vl->patch); + strncpy ((char *) rmp->api_versions[i].name, vl->name, + ARRAY_LEN (rmp->api_versions[i].name)); + rmp->api_versions[i].name[ARRAY_LEN (rmp->api_versions[i].name) - 1] = + '\0'; + } + + vl_api_send_msg (reg, (u8 *) rmp); +} + +#define foreach_vlib_api_msg \ + _ (GET_FIRST_MSG_ID, get_first_msg_id) \ + _ (API_VERSIONS, api_versions) + +/* + * vl_api_init + */ +static int +vlib_api_init (void) +{ + vl_msg_api_msg_config_t cfg; + vl_msg_api_msg_config_t *c = &cfg; + + clib_memset (c, 0, sizeof (*c)); + +#define _(N, n) \ + do \ + { \ + c->id = VL_API_##N; \ + c->name = #n; \ + c->handler = vl_api_##n##_t_handler; \ + c->cleanup = vl_noop_handler; \ + c->endian = vl_api_##n##_t_endian; \ + c->print = vl_api_##n##_t_print; \ + c->size = sizeof (vl_api_##n##_t); \ + c->traced = 1; /* trace, so these msgs print */ \ + c->replay = 0; /* don't replay client create/delete msgs */ \ + c->message_bounce = 0; /* don't bounce this message */ \ + vl_msg_api_config (c); \ + } \ + while (0); + + foreach_vlib_api_msg; +#undef _ + + return 0; +} + +u64 vector_rate_histogram[SLEEP_N_BUCKETS]; + +/* + * Callback to send ourselves a plugin numbering-space trace msg + */ +static void +send_one_plugin_msg_ids_msg (u8 *name, u16 first_msg_id, u16 last_msg_id) +{ + vl_api_trace_plugin_msg_ids_t *mp; + api_main_t *am = vlibapi_get_main (); + vl_shmem_hdr_t *shmem_hdr = am->shmem_hdr; + svm_queue_t *q; + + mp = vl_msg_api_alloc_as_if_client (sizeof (*mp)); + clib_memset (mp, 0, sizeof (*mp)); + + mp->_vl_msg_id = clib_host_to_net_u16 (VL_API_TRACE_PLUGIN_MSG_IDS); + strncpy ((char *) mp->plugin_name, (char *) name, + sizeof (mp->plugin_name) - 1); + mp->first_msg_id = clib_host_to_net_u16 (first_msg_id); + mp->last_msg_id = clib_host_to_net_u16 (last_msg_id); + + q = shmem_hdr->vl_input_queue; + + vl_msg_api_send_shmem (q, (u8 *) &mp); +} + +void +vl_api_save_msg_table (void) +{ + u8 *serialized_message_table; + api_main_t *am = vlibapi_get_main (); + u8 *chroot_file; + int fd, rv; + + /* + * Snapshoot the api message table. + */ + if (strstr ((char *) am->save_msg_table_filename, "..") || + index ((char *) am->save_msg_table_filename, '/')) + { + clib_warning ("illegal save-message-table filename '%s'", + am->save_msg_table_filename); + return; + } + + chroot_file = format (0, "/tmp/%s%c", am->save_msg_table_filename, 0); + + fd = creat ((char *) chroot_file, 0644); + + if (fd < 0) + { + clib_unix_warning ("creat"); + return; + } + + serialized_message_table = vl_api_serialize_message_table (am, 0); + + rv = + write (fd, serialized_message_table, vec_len (serialized_message_table)); + + if (rv != vec_len (serialized_message_table)) + clib_unix_warning ("write"); + + rv = close (fd); + if (rv < 0) + clib_unix_warning ("close"); + + vec_free (chroot_file); + vec_free (serialized_message_table); +} + +clib_error_t *vat_builtin_main_init (vlib_main_t *vm) __attribute__ ((weak)); +clib_error_t * +vat_builtin_main_init (vlib_main_t *vm) +{ + return 0; +} + +static uword +vl_api_clnt_process (vlib_main_t *vm, vlib_node_runtime_t *node, + vlib_frame_t *f) +{ + vlib_global_main_t *vgm = vlib_get_global_main (); + int private_segment_rotor = 0, i, rv; + vl_socket_args_for_process_t *a; + vl_shmem_hdr_t *shm; + svm_queue_t *q; + clib_error_t *e; + api_main_t *am = vlibapi_get_main (); + f64 dead_client_scan_time; + f64 sleep_time, start_time; + f64 vector_rate; + clib_error_t *error; + uword event_type; + uword *event_data = 0; + f64 now; + + if ((error = vl_sock_api_init (vm))) + { + clib_error_report (error); + clib_warning ("socksvr_api_init failed, quitting..."); + return 0; + } + + if ((rv = vlib_api_init ()) < 0) + { + clib_warning ("vlib_api_init returned %d, quitting...", rv); + return 0; + } + + shm = am->shmem_hdr; + q = shm->vl_input_queue; + + e = vlib_call_init_exit_functions (vm, &vgm->api_init_function_registrations, + 1 /* call_once */, 1 /* is_global */); + if (e) + clib_error_report (e); + + e = vat_builtin_main_init (vm); + if (e) + clib_error_report (e); + + sleep_time = 10.0; + dead_client_scan_time = vlib_time_now (vm) + 10.0; + + /* + * Send plugin message range messages for each plugin we loaded + */ + for (i = 0; i < vec_len (am->msg_ranges); i++) + { + vl_api_msg_range_t *rp = am->msg_ranges + i; + send_one_plugin_msg_ids_msg (rp->name, rp->first_msg_id, + rp->last_msg_id); + } + + /* + * Save the api message table snapshot, if configured + */ + if (am->save_msg_table_filename) + vl_api_save_msg_table (); + + /* $$$ pay attention to frame size, control CPU usage */ + while (1) + { + /* + * There's a reason for checking the queue before + * sleeping. If the vlib application crashes, it's entirely + * possible for a client to enqueue a connect request + * during the process restart interval. + * + * Unless some force of physics causes the new incarnation + * of the application to process the request, the client will + * sit and wait for Godot... + */ + vector_rate = (f64) vlib_last_vectors_per_main_loop (vm); + start_time = vlib_time_now (vm); + while (1) + { + if (vl_mem_api_handle_rpc (vm, node) || + vl_mem_api_handle_msg_main (vm, node)) + { + vm->api_queue_nonempty = 0; + VL_MEM_API_LOG_Q_LEN ("q-underflow: len %d", 0); + sleep_time = 20.0; + break; + } + + /* Allow no more than 10us without a pause */ + if (vlib_time_now (vm) > start_time + 10e-6) + { + int index = SLEEP_400_US; + if (vector_rate > 40.0) + sleep_time = 400e-6; + else if (vector_rate > 20.0) + { + index = SLEEP_200_US; + sleep_time = 200e-6; + } + else if (vector_rate >= 1.0) + { + index = SLEEP_100_US; + sleep_time = 100e-6; + } + else + { + index = SLEEP_10_US; + sleep_time = 10e-6; + } + vector_rate_histogram[index] += 1; + break; + } + } + + /* + * see if we have any private api shared-memory segments + * If so, push required context variables, and process + * a message. + */ + if (PREDICT_FALSE (vec_len (am->vlib_private_rps))) + { + if (private_segment_rotor >= vec_len (am->vlib_private_rps)) + private_segment_rotor = 0; + vl_mem_api_handle_msg_private (vm, node, private_segment_rotor++); + } + + vlib_process_wait_for_event_or_clock (vm, sleep_time); + vec_reset_length (event_data); + event_type = vlib_process_get_events (vm, &event_data); + now = vlib_time_now (vm); + + switch (event_type) + { + case QUEUE_SIGNAL_EVENT: + vm->queue_signal_pending = 0; + VL_MEM_API_LOG_Q_LEN ("q-awake: len %d", q->cursize); + + break; + case SOCKET_READ_EVENT: + for (i = 0; i < vec_len (event_data); i++) + { + vl_api_registration_t *regp; + + a = pool_elt_at_index (socket_main.process_args, event_data[i]); + regp = vl_socket_get_registration (a->reg_index); + if (regp) + { + vl_socket_process_api_msg (regp, (i8 *) a->data); + a = pool_elt_at_index (socket_main.process_args, + event_data[i]); + } + vec_free (a->data); + pool_put (socket_main.process_args, a); + } + break; + + /* Timeout... */ + case -1: + break; + + default: + clib_warning ("unknown event type %d", event_type); + break; + } + + if (now > dead_client_scan_time) + { + vl_mem_api_dead_client_scan (am, shm, now); + dead_client_scan_time = vlib_time_now (vm) + 10.0; + } + } + + return 0; +} + +VLIB_REGISTER_NODE (vl_api_clnt_node) = { + .function = vl_api_clnt_process, + .type = VLIB_NODE_TYPE_PROCESS, + .name = "api-rx-from-ring", + .state = VLIB_NODE_STATE_DISABLED, + .process_log2_n_stack_bytes = 18, +}; + +void +vl_mem_api_enable_disable (vlib_main_t *vm, int enable) +{ + vlib_node_set_state ( + vm, vl_api_clnt_node.index, + (enable ? VLIB_NODE_STATE_POLLING : VLIB_NODE_STATE_DISABLED)); +} + +static uword +api_rx_from_node (vlib_main_t *vm, vlib_node_runtime_t *node, + vlib_frame_t *frame) +{ + uword n_packets = frame->n_vectors; + uword n_left_from; + u32 *from; + static u8 *long_msg; + + vec_validate (long_msg, 4095); + n_left_from = frame->n_vectors; + from = vlib_frame_vector_args (frame); + + while (n_left_from > 0) + { + u32 bi0; + vlib_buffer_t *b0; + void *msg; + uword msg_len; + + bi0 = from[0]; + b0 = vlib_get_buffer (vm, bi0); + from += 1; + n_left_from -= 1; + + msg = b0->data + b0->current_data; + msg_len = b0->current_length; + if (b0->flags & VLIB_BUFFER_NEXT_PRESENT) + { + ASSERT (long_msg != 0); + _vec_len (long_msg) = 0; + vec_add (long_msg, msg, msg_len); + while (b0->flags & VLIB_BUFFER_NEXT_PRESENT) + { + b0 = vlib_get_buffer (vm, b0->next_buffer); + msg = b0->data + b0->current_data; + msg_len = b0->current_length; + vec_add (long_msg, msg, msg_len); + } + msg = long_msg; + } + vl_msg_api_handler_no_trace_no_free (msg); + } + + /* Free what we've been given. */ + vlib_buffer_free (vm, vlib_frame_vector_args (frame), n_packets); + + return n_packets; +} + +VLIB_REGISTER_NODE (api_rx_from_node_node, static) = { + .function = api_rx_from_node, + .type = VLIB_NODE_TYPE_INTERNAL, + .vector_size = 4, + .name = "api-rx-from-node", +}; + +static void +vl_api_rpc_call_t_handler (vl_api_rpc_call_t *mp) +{ + vl_api_rpc_call_reply_t *rmp; + int (*fp) (void *); + i32 rv = 0; + vlib_main_t *vm = vlib_get_main (); + + if (mp->function == 0) + { + rv = -1; + clib_warning ("rpc NULL function pointer"); + } + + else + { + if (mp->need_barrier_sync) + vlib_worker_thread_barrier_sync (vm); + + fp = uword_to_pointer (mp->function, int (*) (void *)); + rv = fp (mp->data); + + if (mp->need_barrier_sync) + vlib_worker_thread_barrier_release (vm); + } + + if (mp->send_reply) + { + svm_queue_t *q = vl_api_client_index_to_input_queue (mp->client_index); + if (q) + { + rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp)); + rmp->_vl_msg_id = ntohs (VL_API_RPC_CALL_REPLY); + rmp->context = mp->context; + rmp->retval = rv; + vl_msg_api_send_shmem (q, (u8 *) &rmp); + } + } + if (mp->multicast) + { + clib_warning ("multicast not yet implemented..."); + } +} + +static void +vl_api_rpc_call_reply_t_handler (vl_api_rpc_call_reply_t *mp) +{ + clib_warning ("unimplemented"); +} + +void +vl_api_send_pending_rpc_requests (vlib_main_t *vm) +{ + vlib_main_t *vm_global = vlib_get_first_main (); + + ASSERT (vm != vm_global); + + clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock); + vec_append (vm_global->pending_rpc_requests, vm->pending_rpc_requests); + vec_reset_length (vm->pending_rpc_requests); + clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock); +} + +always_inline void +vl_api_rpc_call_main_thread_inline (void *fp, u8 *data, u32 data_length, + u8 force_rpc) +{ + vl_api_rpc_call_t *mp; + vlib_main_t *vm_global = vlib_get_first_main (); + vlib_main_t *vm = vlib_get_main (); + + /* Main thread and not a forced RPC: call the function directly */ + if ((force_rpc == 0) && (vlib_get_thread_index () == 0)) + { + void (*call_fp) (void *); + + vlib_worker_thread_barrier_sync (vm); + + call_fp = fp; + call_fp (data); + + vlib_worker_thread_barrier_release (vm); + return; + } + + /* Otherwise, actually do an RPC */ + mp = vl_msg_api_alloc_as_if_client (sizeof (*mp) + data_length); + + clib_memset (mp, 0, sizeof (*mp)); + clib_memcpy_fast (mp->data, data, data_length); + mp->_vl_msg_id = ntohs (VL_API_RPC_CALL); + mp->function = pointer_to_uword (fp); + mp->need_barrier_sync = 1; + + /* Add to the pending vector. Thread 0 requires locking. */ + if (vm == vm_global) + clib_spinlock_lock_if_init (&vm_global->pending_rpc_lock); + vec_add1 (vm->pending_rpc_requests, (uword) mp); + if (vm == vm_global) + clib_spinlock_unlock_if_init (&vm_global->pending_rpc_lock); +} + +/* + * Check if called from worker threads. + * If so, make rpc call of fp through shmem. + * Otherwise, call fp directly + */ +void +vl_api_rpc_call_main_thread (void *fp, u8 *data, u32 data_length) +{ + vl_api_rpc_call_main_thread_inline (fp, data, data_length, /*force_rpc */ + 0); +} + +/* + * Always make rpc call of fp through shmem, useful for calling from threads + * not setup as worker threads, such as DPDK callback thread + */ +void +vl_api_force_rpc_call_main_thread (void *fp, u8 *data, u32 data_length) +{ + vl_api_rpc_call_main_thread_inline (fp, data, data_length, /*force_rpc */ + 1); +} + +static void +vl_api_trace_plugin_msg_ids_t_handler (vl_api_trace_plugin_msg_ids_t *mp) +{ + api_main_t *am = vlibapi_get_main (); + vl_api_msg_range_t *rp; + uword *p; + + /* Noop (except for tracing) during normal operation */ + if (am->replay_in_progress == 0) + return; + + p = hash_get_mem (am->msg_range_by_name, mp->plugin_name); + if (p == 0) + { + clib_warning ("WARNING: traced plugin '%s' not in current image", + mp->plugin_name); + return; + } + + rp = vec_elt_at_index (am->msg_ranges, p[0]); + if (rp->first_msg_id != clib_net_to_host_u16 (mp->first_msg_id)) + { + clib_warning ("WARNING: traced plugin '%s' first message id %d not %d", + mp->plugin_name, clib_net_to_host_u16 (mp->first_msg_id), + rp->first_msg_id); + } + + if (rp->last_msg_id != clib_net_to_host_u16 (mp->last_msg_id)) + { + clib_warning ("WARNING: traced plugin '%s' last message id %d not %d", + mp->plugin_name, clib_net_to_host_u16 (mp->last_msg_id), + rp->last_msg_id); + } +} + +#define foreach_rpc_api_msg \ + _ (RPC_CALL, rpc_call) \ + _ (RPC_CALL_REPLY, rpc_call_reply) + +#define foreach_plugin_trace_msg _ (TRACE_PLUGIN_MSG_IDS, trace_plugin_msg_ids) + +/* + * Set the rpc callback at our earliest possible convenience. + * This avoids ordering issues between thread_init() -> start_workers and + * an init function which we could define here. If we ever intend to use + * vlib all by itself, we can't create a link-time dependency on + * an init function here and a typical "call foo_init first" + * guitar lick. + */ + +extern void *rpc_call_main_thread_cb_fn; + +static clib_error_t * +rpc_api_hookup (vlib_main_t *vm) +{ + api_main_t *am = vlibapi_get_main (); +#define _(N, n) \ + vl_msg_api_set_handlers ( \ + VL_API_##N, #n, vl_api_##n##_t_handler, vl_noop_handler, vl_noop_handler, \ + vl_api_##n##_t_print, sizeof (vl_api_##n##_t), 0 /* do not trace */); + foreach_rpc_api_msg; +#undef _ + +#define _(N, n) \ + vl_msg_api_set_handlers ( \ + VL_API_##N, #n, vl_api_##n##_t_handler, vl_noop_handler, vl_noop_handler, \ + vl_api_##n##_t_print, sizeof (vl_api_##n##_t), 1 /* do trace */); + foreach_plugin_trace_msg; +#undef _ + + /* No reason to halt the parade to create a trace record... */ + am->is_mp_safe[VL_API_TRACE_PLUGIN_MSG_IDS] = 1; + rpc_call_main_thread_cb_fn = vl_api_rpc_call_main_thread; + return 0; +} + +VLIB_API_INIT_FUNCTION (rpc_api_hookup); + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg