/*
- * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2019 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:
#include <math.h>
#include <vlib/vlib.h>
#include <vnet/vnet.h>
-#include <vnet/tcp/tcp.h>
#include <vppinfra/elog.h>
+#include <vnet/session/transport.h>
+#include <vnet/session/session.h>
#include <vnet/session/application.h>
+#include <vnet/session/application_interface.h>
+#include <vnet/session/application_local.h>
#include <vnet/session/session_debug.h>
-#include <vlibmemory/unix_shared_memory_queue.h>
+#include <svm/queue.h>
+#include <sys/timerfd.h>
-vlib_node_registration_t session_queue_node;
+static inline void
+session_wrk_send_evt_to_main (session_worker_t *wrk, session_evt_elt_t *elt)
+{
+ session_evt_elt_t *he;
+ uword thread_index;
+ u8 is_empty;
+
+ thread_index = wrk->vm->thread_index;
+ he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main);
+ is_empty = clib_llist_is_empty (wrk->event_elts, evt_list, he);
+ clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
+ if (is_empty)
+ session_send_rpc_evt_to_thread (0, session_wrk_handle_evts_main_rpc,
+ uword_to_pointer (thread_index, void *));
+}
-typedef struct
+#define app_check_thread_and_barrier(_wrk, _elt) \
+ if (!vlib_thread_is_main_w_barrier ()) \
+ { \
+ session_wrk_send_evt_to_main (wrk, elt); \
+ return; \
+ }
+
+static void
+session_wrk_timerfd_update (session_worker_t *wrk, u64 time_ns)
{
- u32 session_index;
- u32 server_thread_index;
-} session_queue_trace_t;
+ struct itimerspec its;
-/* packet trace format function */
-static u8 *
-format_session_queue_trace (u8 * s, va_list * args)
+ its.it_value.tv_sec = 0;
+ its.it_value.tv_nsec = time_ns;
+ its.it_interval.tv_sec = 0;
+ its.it_interval.tv_nsec = its.it_value.tv_nsec;
+
+ if (timerfd_settime (wrk->timerfd, 0, &its, NULL) == -1)
+ clib_warning ("timerfd_settime");
+}
+
+always_inline u64
+session_wrk_tfd_timeout (session_wrk_state_t state, u32 thread_index)
{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
- session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
+ if (state == SESSION_WRK_INTERRUPT)
+ return thread_index ? 1e6 : vlib_num_workers () ? 5e8 : 1e6;
+ else if (state == SESSION_WRK_IDLE)
+ return thread_index ? 1e8 : vlib_num_workers () ? 5e8 : 1e8;
+ else
+ return 0;
+}
- s = format (s, "SESSION_QUEUE: session index %d, server thread index %d",
- t->session_index, t->server_thread_index);
- return s;
+static inline void
+session_wrk_set_state (session_worker_t *wrk, session_wrk_state_t state)
+{
+ u64 time_ns;
+
+ wrk->state = state;
+ if (wrk->timerfd == -1)
+ return;
+ time_ns = session_wrk_tfd_timeout (state, wrk->vm->thread_index);
+ session_wrk_timerfd_update (wrk, time_ns);
}
-vlib_node_registration_t session_queue_node;
+static transport_endpt_ext_cfg_t *
+session_mq_get_ext_config (application_t *app, uword offset)
+{
+ svm_fifo_chunk_t *c;
+ fifo_segment_t *fs;
-#define foreach_session_queue_error \
-_(TX, "Packets transmitted") \
-_(TIMER, "Timer events") \
-_(NO_BUFFER, "Out of buffers")
+ fs = application_get_rx_mqs_segment (app);
+ c = fs_chunk_ptr (fs->h, offset);
+ return (transport_endpt_ext_cfg_t *) c->data;
+}
-typedef enum
+static void
+session_mq_free_ext_config (application_t *app, uword offset)
{
-#define _(sym,str) SESSION_QUEUE_ERROR_##sym,
- foreach_session_queue_error
-#undef _
- SESSION_QUEUE_N_ERROR,
-} session_queue_error_t;
+ svm_fifo_chunk_t *c;
+ fifo_segment_t *fs;
-static char *session_queue_error_strings[] = {
-#define _(sym,string) string,
- foreach_session_queue_error
-#undef _
-};
+ fs = application_get_rx_mqs_segment (app);
+ c = fs_chunk_ptr (fs->h, offset);
+ fifo_segment_collect_chunk (fs, 0 /* only one slice */, c);
+}
-static u32 session_type_to_next[] = {
- SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT,
- SESSION_QUEUE_NEXT_IP4_LOOKUP,
- SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT,
- SESSION_QUEUE_NEXT_IP6_LOOKUP,
-};
+static void
+session_mq_listen_handler (session_worker_t *wrk, session_evt_elt_t *elt)
+{
+ vnet_listen_args_t _a, *a = &_a;
+ session_listen_msg_t *mp;
+ app_worker_t *app_wrk;
+ application_t *app;
+ int rv;
-always_inline void
-session_tx_fifo_chain_tail (session_manager_main_t * smm, vlib_main_t * vm,
- u8 thread_index, svm_fifo_t * fifo,
- vlib_buffer_t * b0, u32 bi0, u8 n_bufs_per_seg,
- u32 left_from_seg, u32 * left_to_snd0,
- u16 * n_bufs, u32 * tx_offset, u16 deq_per_buf,
- u8 peek_data)
-{
- vlib_buffer_t *chain_b0, *prev_b0;
- u32 chain_bi0, to_deq;
- u16 len_to_deq0, n_bytes_read;
- u8 *data0, j;
-
- b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
- b0->total_length_not_including_first_buffer = 0;
-
- chain_bi0 = bi0;
- chain_b0 = b0;
- to_deq = left_from_seg;
- for (j = 1; j < n_bufs_per_seg; j++)
- {
- prev_b0 = chain_b0;
- len_to_deq0 = clib_min (to_deq, deq_per_buf);
+ app_check_thread_and_barrier (wrk, elt);
- *n_bufs -= 1;
- chain_bi0 = smm->tx_buffers[thread_index][*n_bufs];
- _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
+ mp = session_evt_ctrl_data (wrk, elt);
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
- chain_b0 = vlib_get_buffer (vm, chain_bi0);
- chain_b0->current_data = 0;
- data0 = vlib_buffer_get_current (chain_b0);
- if (peek_data)
- {
- n_bytes_read = svm_fifo_peek (fifo, *tx_offset, len_to_deq0, data0);
- *tx_offset += n_bytes_read;
- }
- else
- {
- n_bytes_read = svm_fifo_dequeue_nowait (fifo, len_to_deq0, data0);
- }
- ASSERT (n_bytes_read == len_to_deq0);
- chain_b0->current_length = n_bytes_read;
- b0->total_length_not_including_first_buffer += chain_b0->current_length;
+ clib_memset (a, 0, sizeof (*a));
+ a->sep.is_ip4 = mp->is_ip4;
+ ip_copy (&a->sep.ip, &mp->ip, mp->is_ip4);
+ a->sep.port = mp->port;
+ a->sep.fib_index = mp->vrf;
+ a->sep.sw_if_index = ENDPOINT_INVALID_INDEX;
+ a->sep.transport_proto = mp->proto;
+ a->app_index = app->app_index;
+ a->wrk_map_index = mp->wrk_index;
+ a->sep_ext.transport_flags = mp->flags;
- /* update previous buffer */
- prev_b0->next_buffer = chain_bi0;
- prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ if (mp->ext_config)
+ a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config);
- /* update current buffer */
- chain_b0->next_buffer = 0;
+ if ((rv = vnet_listen (a)))
+ clib_warning ("listen returned: %U", format_session_error, rv);
- to_deq -= n_bytes_read;
- if (to_deq == 0)
- break;
- }
- ASSERT (to_deq == 0
- && b0->total_length_not_including_first_buffer == left_from_seg);
- *left_to_snd0 -= left_from_seg;
+ app_wrk = application_get_worker (app, mp->wrk_index);
+ mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
+
+ if (mp->ext_config)
+ session_mq_free_ext_config (app, mp->ext_config);
}
-always_inline int
-session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm,
- session_fifo_event_t * e0,
- stream_session_t * s0, u32 thread_index,
- int *n_tx_packets, u8 peek_data)
+static void
+session_mq_listen_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
- u32 n_trace = vlib_get_trace_count (vm, node);
- u32 left_to_snd0, max_len_to_snd0, len_to_deq0, snd_space0;
- u32 n_bufs_per_evt, n_frames_per_evt, n_bufs_per_frame;
- transport_connection_t *tc0;
- transport_proto_vft_t *transport_vft;
- u32 next_index, next0, *to_next, n_left_to_next, bi0;
- vlib_buffer_t *b0;
- u32 tx_offset = 0, max_dequeue0, n_bytes_per_seg, left_for_seg;
- u16 snd_mss0, n_bufs_per_seg, n_bufs;
- u8 *data0;
- int i, n_bytes_read;
- u32 n_bytes_per_buf, deq_per_buf, deq_per_first_buf;
- u32 buffers_allocated, buffers_allocated_this_call;
+ vnet_listen_args_t _a, *a = &_a;
+ session_listen_uri_msg_t *mp;
+ app_worker_t *app_wrk;
+ application_t *app;
+ int rv;
- next_index = next0 = session_type_to_next[s0->session_type];
+ app_check_thread_and_barrier (wrk, elt);
- transport_vft = transport_protocol_get_vft (s0->session_type);
- tc0 = transport_vft->get_connection (s0->connection_index, thread_index);
+ mp = session_evt_ctrl_data (wrk, elt);
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
- /* Make sure we have space to send and there's something to dequeue */
- snd_mss0 = transport_vft->send_mss (tc0);
- snd_space0 = transport_vft->send_space (tc0);
+ clib_memset (a, 0, sizeof (*a));
+ a->uri = (char *) mp->uri;
+ a->app_index = app->app_index;
+ rv = vnet_bind_uri (a);
+
+ app_wrk = application_get_worker (app, 0);
+ mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
+}
- /* Can't make any progress */
- if (snd_space0 == 0 || snd_mss0 == 0)
+static void
+session_mq_connect_one (session_connect_msg_t *mp)
+{
+ vnet_connect_args_t _a, *a = &_a;
+ app_worker_t *app_wrk;
+ application_t *app;
+ int rv;
+
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
+
+ clib_memset (a, 0, sizeof (*a));
+ a->sep.is_ip4 = mp->is_ip4;
+ clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
+ a->sep.port = mp->port;
+ a->sep.transport_proto = mp->proto;
+ a->sep.peer.fib_index = mp->vrf;
+ a->sep.dscp = mp->dscp;
+ clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
+ if (mp->is_ip4)
+ {
+ ip46_address_mask_ip4 (&a->sep.ip);
+ ip46_address_mask_ip4 (&a->sep.peer.ip);
+ }
+ a->sep.peer.port = mp->lcl_port;
+ a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
+ a->sep_ext.parent_handle = mp->parent_handle;
+ a->sep_ext.transport_flags = mp->flags;
+ a->api_context = mp->context;
+ a->app_index = app->app_index;
+ a->wrk_map_index = mp->wrk_index;
+
+ if (mp->ext_config)
+ a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config);
+
+ if ((rv = vnet_connect (a)))
{
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
- return 0;
+ clib_warning ("connect returned: %U", format_session_error, rv);
+ app_wrk = application_get_worker (app, mp->wrk_index);
+ mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
}
- /* Allow enqueuing of a new event */
- svm_fifo_unset_event (s0->server_tx_fifo);
+ if (mp->ext_config)
+ session_mq_free_ext_config (app, mp->ext_config);
+}
- /* Check how much we can pull. */
- max_dequeue0 = svm_fifo_max_dequeue (s0->server_tx_fifo);
+static void
+session_mq_handle_connects_rpc (void *arg)
+{
+ u32 max_connects = 32, n_connects = 0;
+ session_evt_elt_t *he, *elt, *next;
+ session_worker_t *fwrk;
- if (peek_data)
- {
- /* Offset in rx fifo from where to peek data */
- tx_offset = transport_vft->tx_fifo_offset (tc0);
- if (PREDICT_FALSE (tx_offset >= max_dequeue0))
- max_dequeue0 = 0;
- else
- max_dequeue0 -= tx_offset;
- }
+ ASSERT (session_vlib_thread_is_cl_thread ());
- /* Nothing to read return */
- if (max_dequeue0 == 0)
- return 0;
+ /* Pending connects on linked list pertaining to first worker */
+ fwrk = session_main_get_worker (transport_cl_thread ());
+ if (!fwrk->n_pending_connects)
+ return;
- /* Ensure we're not writing more than transport window allows */
- if (max_dequeue0 < snd_space0)
+ he = clib_llist_elt (fwrk->event_elts, fwrk->pending_connects);
+ elt = clib_llist_next (fwrk->event_elts, evt_list, he);
+
+ /* Avoid holding the worker for too long */
+ while (n_connects < max_connects && elt != he)
{
- /* Constrained by tx queue. Try to send only fully formed segments */
- max_len_to_snd0 = (max_dequeue0 > snd_mss0) ?
- max_dequeue0 - max_dequeue0 % snd_mss0 : max_dequeue0;
- /* TODO Nagle ? */
+ next = clib_llist_next (fwrk->event_elts, evt_list, elt);
+ clib_llist_remove (fwrk->event_elts, evt_list, elt);
+ session_mq_connect_one (session_evt_ctrl_data (fwrk, elt));
+ session_evt_ctrl_data_free (fwrk, elt);
+ clib_llist_put (fwrk->event_elts, elt);
+ elt = next;
+ n_connects += 1;
}
- else
+
+ /* Decrement with worker barrier */
+ fwrk->n_pending_connects -= n_connects;
+ if (fwrk->n_pending_connects > 0)
{
- /* Expectation is that snd_space0 is already a multiple of snd_mss */
- max_len_to_snd0 = snd_space0;
+ session_send_rpc_evt_to_thread_force (fwrk->vm->thread_index,
+ session_mq_handle_connects_rpc, 0);
}
+}
- n_bytes_per_buf = vlib_buffer_free_list_buffer_size
- (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
- ASSERT (n_bytes_per_buf > MAX_HDRS_LEN);
- n_bytes_per_seg = MAX_HDRS_LEN + snd_mss0;
- n_bufs_per_seg = ceil ((double) n_bytes_per_seg / n_bytes_per_buf);
- n_bufs_per_evt = ceil ((double) max_len_to_snd0 / n_bytes_per_seg);
- n_frames_per_evt = ceil ((double) n_bufs_per_evt / VLIB_FRAME_SIZE);
- n_bufs_per_frame = n_bufs_per_seg * VLIB_FRAME_SIZE;
-
- deq_per_buf = clib_min (snd_mss0, n_bytes_per_buf);
- deq_per_first_buf = clib_min (snd_mss0, n_bytes_per_buf - MAX_HDRS_LEN);
+static void
+session_mq_connect_handler (session_worker_t *wrk, session_evt_elt_t *elt)
+{
+ u32 thread_index = wrk - session_main.wrk;
+ session_evt_elt_t *he;
- n_bufs = vec_len (smm->tx_buffers[thread_index]);
- left_to_snd0 = max_len_to_snd0;
- for (i = 0; i < n_frames_per_evt; i++)
+ if (PREDICT_FALSE (thread_index > transport_cl_thread ()))
{
- /* Make sure we have at least one full frame of buffers ready */
- if (PREDICT_FALSE (n_bufs < n_bufs_per_frame))
- {
- vec_validate (smm->tx_buffers[thread_index],
- n_bufs + n_bufs_per_frame - 1);
- buffers_allocated = 0;
- do
- {
- buffers_allocated_this_call = vlib_buffer_alloc (vm,
- &smm->tx_buffers
- [thread_index]
- [n_bufs +
- buffers_allocated],
- n_bufs_per_frame
- -
- buffers_allocated);
- buffers_allocated += buffers_allocated_this_call;
- }
- while (buffers_allocated_this_call > 0
- && ((buffers_allocated + n_bufs < n_bufs_per_frame)));
-
- n_bufs += buffers_allocated;
- _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
+ clib_warning ("Connect on wrong thread. Dropping");
+ return;
+ }
- if (PREDICT_FALSE (n_bufs < n_bufs_per_frame))
- {
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
- return -1;
- }
- ASSERT (n_bufs >= n_bufs_per_frame);
- }
+ /* If on worker, check if main has any pending messages. Avoids reordering
+ * with other control messages that need to be handled by main
+ */
+ if (thread_index)
+ {
+ he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main);
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (left_to_snd0 && n_left_to_next)
+ /* Events pending on main, postpone to avoid reordering */
+ if (!clib_llist_is_empty (wrk->event_elts, evt_list, he))
{
- /*
- * Handle first buffer in chain separately
- */
-
- /* Get free buffer */
- ASSERT (n_bufs >= 1);
- bi0 = smm->tx_buffers[thread_index][--n_bufs];
- _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
-
- /* usual speculation, or the enqueue_x1 macro will barf */
- to_next[0] = bi0;
- to_next += 1;
- n_left_to_next -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- b0->error = 0;
- b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
- b0->current_data = 0;
- b0->total_length_not_including_first_buffer = 0;
-
- len_to_deq0 = clib_min (left_to_snd0, deq_per_first_buf);
- data0 = vlib_buffer_make_headroom (b0, MAX_HDRS_LEN);
- if (peek_data)
- {
- n_bytes_read = svm_fifo_peek (s0->server_tx_fifo, tx_offset,
- len_to_deq0, data0);
- if (n_bytes_read <= 0)
- goto dequeue_fail;
- /* Keep track of progress locally, transport is also supposed to
- * increment it independently when pushing the header */
- tx_offset += n_bytes_read;
- }
- else
- {
- n_bytes_read = svm_fifo_dequeue_nowait (s0->server_tx_fifo,
- len_to_deq0, data0);
- if (n_bytes_read <= 0)
- goto dequeue_fail;
- }
-
- b0->current_length = n_bytes_read;
-
- left_to_snd0 -= n_bytes_read;
- *n_tx_packets = *n_tx_packets + 1;
-
- /*
- * Fill in the remaining buffers in the chain, if any
- */
- if (PREDICT_FALSE (n_bufs_per_seg > 1 && left_to_snd0))
- {
- left_for_seg = clib_min (snd_mss0 - n_bytes_read, left_to_snd0);
- session_tx_fifo_chain_tail (smm, vm, thread_index,
- s0->server_tx_fifo, b0, bi0,
- n_bufs_per_seg, left_for_seg,
- &left_to_snd0, &n_bufs, &tx_offset,
- deq_per_buf, peek_data);
- }
+ clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
+ return;
+ }
+ }
- /* Ask transport to push header after current_length and
- * total_length_not_including_first_buffer are updated */
- transport_vft->push_header (tc0, b0);
+ /* Add to pending list to be handled by first worker */
+ he = clib_llist_elt (wrk->event_elts, wrk->pending_connects);
+ clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
- /* *INDENT-OFF* */
- SESSION_EVT_DBG(SESSION_EVT_DEQ, s0, ({
- ed->data[0] = e0->event_type;
- ed->data[1] = max_dequeue0;
- ed->data[2] = len_to_deq0;
- ed->data[3] = left_to_snd0;
- }));
- /* *INDENT-ON* */
+ /* Decremented with worker barrier */
+ wrk->n_pending_connects += 1;
+ if (wrk->n_pending_connects == 1)
+ {
+ session_send_rpc_evt_to_thread_force (thread_index,
+ session_mq_handle_connects_rpc, 0);
+ }
+}
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
- tcp_trajectory_add_start (b0, 3);
+static void
+session_mq_connect_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
+{
+ vnet_connect_args_t _a, *a = &_a;
+ session_connect_uri_msg_t *mp;
+ app_worker_t *app_wrk;
+ application_t *app;
+ int rv;
- if (PREDICT_FALSE (n_trace > 0))
- {
- session_queue_trace_t *t0;
- vlib_trace_buffer (vm, node, next_index, b0,
- 1 /* follow_chain */ );
- vlib_set_trace_count (vm, node, --n_trace);
- t0 = vlib_add_trace (vm, node, b0, sizeof (*t0));
- t0->session_index = s0->session_index;
- t0->server_thread_index = s0->thread_index;
- }
+ app_check_thread_and_barrier (wrk, elt);
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
+ mp = session_evt_ctrl_data (wrk, elt);
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
- /* If we couldn't dequeue all bytes mark as partially read */
- if (max_len_to_snd0 < max_dequeue0)
+ clib_memset (a, 0, sizeof (*a));
+ a->uri = (char *) mp->uri;
+ a->api_context = mp->context;
+ a->app_index = app->app_index;
+ if ((rv = vnet_connect_uri (a)))
{
- /* If we don't already have new event */
- if (svm_fifo_set_event (s0->server_tx_fifo))
- {
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
- }
+ clib_warning ("connect_uri returned: %d", rv);
+ app_wrk = application_get_worker (app, 0 /* default wrk only */ );
+ mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
}
- return 0;
+}
-dequeue_fail:
- /*
- * Can't read from fifo. If we don't already have an event, save as partially
- * read, return buff to free list and return
- */
- clib_warning ("dequeue fail");
+static void
+session_mq_shutdown_handler (void *data)
+{
+ session_shutdown_msg_t *mp = (session_shutdown_msg_t *) data;
+ vnet_shutdown_args_t _a, *a = &_a;
+ application_t *app;
- if (svm_fifo_set_event (s0->server_tx_fifo))
- {
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
- _vec_len (smm->tx_buffers[thread_index]) += 1;
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
- return 0;
+ a->app_index = app->app_index;
+ a->handle = mp->handle;
+ vnet_shutdown_session (a);
}
-int
-session_tx_fifo_peek_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm,
- session_fifo_event_t * e0,
- stream_session_t * s0, u32 thread_index,
- int *n_tx_pkts)
+static void
+session_mq_disconnect_handler (void *data)
{
- return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
- n_tx_pkts, 1);
+ session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
+ vnet_disconnect_args_t _a, *a = &_a;
+ application_t *app;
+
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
+
+ a->app_index = app->app_index;
+ a->handle = mp->handle;
+ vnet_disconnect_session (a);
}
-int
-session_tx_fifo_dequeue_and_snd (vlib_main_t * vm, vlib_node_runtime_t * node,
- session_manager_main_t * smm,
- session_fifo_event_t * e0,
- stream_session_t * s0, u32 thread_index,
- int *n_tx_pkts)
+static void
+app_mq_detach_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
- return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
- n_tx_pkts, 0);
+ vnet_app_detach_args_t _a, *a = &_a;
+ session_app_detach_msg_t *mp;
+ application_t *app;
+
+ app_check_thread_and_barrier (wrk, elt);
+
+ mp = session_evt_ctrl_data (wrk, elt);
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
+
+ a->app_index = app->app_index;
+ a->api_client_index = mp->client_index;
+ vnet_application_detach (a);
}
-always_inline stream_session_t *
-session_event_get_session (session_fifo_event_t * e, u8 thread_index)
+static void
+session_mq_unlisten_handler (session_worker_t *wrk, session_evt_elt_t *elt)
{
- return session_get_if_valid (e->fifo->master_session_index, thread_index);
+ vnet_unlisten_args_t _a, *a = &_a;
+ session_unlisten_msg_t *mp;
+ app_worker_t *app_wrk;
+ session_handle_t sh;
+ application_t *app;
+ int rv;
+
+ app_check_thread_and_barrier (wrk, elt);
+
+ mp = session_evt_ctrl_data (wrk, elt);
+ sh = mp->handle;
+
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
+
+ clib_memset (a, 0, sizeof (*a));
+ a->app_index = app->app_index;
+ a->handle = sh;
+ a->wrk_map_index = mp->wrk_index;
+
+ if ((rv = vnet_unlisten (a)))
+ clib_warning ("unlisten returned: %d", rv);
+
+ app_wrk = application_get_worker (app, a->wrk_map_index);
+ if (!app_wrk)
+ return;
+
+ mq_send_unlisten_reply (app_wrk, sh, mp->context, rv);
}
-void
-dump_thread_0_event_queue (void)
+static void
+session_mq_accepted_reply_handler (session_worker_t *wrk,
+ session_evt_elt_t *elt)
{
- session_manager_main_t *smm = vnet_get_session_manager_main ();
- vlib_main_t *vm = &vlib_global_main;
- u32 my_thread_index = vm->thread_index;
- session_fifo_event_t _e, *e = &_e;
- stream_session_t *s0;
- int i, index;
- i8 *headp;
+ vnet_disconnect_args_t _a = { 0 }, *a = &_a;
+ session_accepted_reply_msg_t *mp;
+ session_state_t old_state;
+ app_worker_t *app_wrk;
+ session_t *s;
+
+ mp = session_evt_ctrl_data (wrk, elt);
+
+ /* Mail this back from the main thread. We're not polling in main
+ * thread so we're using other workers for notifications. */
+ if (session_thread_from_handle (mp->handle) == 0 && vlib_num_workers () &&
+ vlib_get_thread_index () != 0)
+ {
+ session_wrk_send_evt_to_main (wrk, elt);
+ return;
+ }
- unix_shared_memory_queue_t *q;
- q = smm->vpp_event_queues[my_thread_index];
+ s = session_get_from_handle_if_valid (mp->handle);
+ if (!s)
+ return;
- index = q->head;
+ app_wrk = app_worker_get (s->app_wrk_index);
+ if (app_wrk->app_index != mp->context)
+ {
+ clib_warning ("app doesn't own session");
+ return;
+ }
- for (i = 0; i < q->cursize; i++)
+ /* Server isn't interested, disconnect the session */
+ if (mp->retval)
{
- headp = (i8 *) (&q->data[0] + q->elsize * index);
- clib_memcpy (e, headp, q->elsize);
+ a->app_index = mp->context;
+ a->handle = mp->handle;
+ vnet_disconnect_session (a);
+ return;
+ }
- switch (e->event_type)
- {
- case FIFO_EVENT_APP_TX:
- s0 = session_event_get_session (e, my_thread_index);
- fformat (stdout, "[%04d] TX session %d\n", i, s0->session_index);
- break;
+ /* Special handling for cut-through sessions */
+ if (!session_has_transport (s))
+ {
+ session_set_state (s, SESSION_STATE_READY);
+ ct_session_connect_notify (s, SESSION_E_NONE);
+ return;
+ }
- case FIFO_EVENT_DISCONNECT:
- s0 = session_get_from_handle (e->session_handle);
- fformat (stdout, "[%04d] disconnect session %d\n", i,
- s0->session_index);
- break;
+ old_state = s->session_state;
+ session_set_state (s, SESSION_STATE_READY);
- case FIFO_EVENT_BUILTIN_RX:
- s0 = session_event_get_session (e, my_thread_index);
- fformat (stdout, "[%04d] builtin_rx %d\n", i, s0->session_index);
- break;
+ if (!svm_fifo_is_empty_prod (s->rx_fifo))
+ app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
- case FIFO_EVENT_RPC:
- fformat (stdout, "[%04d] RPC call %llx with %llx\n",
- i, (u64) (e->rpc_args.fp), (u64) (e->rpc_args.arg));
- break;
+ /* Closed while waiting for app to reply. Resend disconnect */
+ if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ {
+ app_worker_close_notify (app_wrk, s);
+ session_set_state (s, old_state);
+ return;
+ }
+}
- default:
- fformat (stdout, "[%04d] unhandled event type %d\n",
- i, e->event_type);
- break;
- }
+static void
+session_mq_reset_reply_handler (void *data)
+{
+ vnet_disconnect_args_t _a = { 0 }, *a = &_a;
+ session_reset_reply_msg_t *mp;
+ app_worker_t *app_wrk;
+ session_t *s;
+ application_t *app;
+ u32 index, thread_index;
+
+ mp = (session_reset_reply_msg_t *) data;
+ app = application_lookup (mp->context);
+ if (!app)
+ return;
- index++;
+ session_parse_handle (mp->handle, &index, &thread_index);
+ s = session_get_if_valid (index, thread_index);
- if (index == q->maxsize)
- index = 0;
+ /* No session or not the right session */
+ if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
+ return;
+
+ app_wrk = app_worker_get (s->app_wrk_index);
+ if (!app_wrk || app_wrk->app_index != app->app_index)
+ {
+ clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
+ mp->handle);
+ return;
+ }
+
+ /* Client objected to resetting the session, log and continue */
+ if (mp->retval)
+ {
+ clib_warning ("client retval %d", mp->retval);
+ return;
}
+
+ /* This comes as a response to a reset, transport only waiting for
+ * confirmation to remove connection state, no need to disconnect */
+ a->handle = mp->handle;
+ a->app_index = app->app_index;
+ vnet_disconnect_session (a);
}
-static u8
-session_node_cmp_event (session_fifo_event_t * e, svm_fifo_t * f)
+static void
+session_mq_disconnected_handler (void *data)
{
- stream_session_t *s;
- switch (e->event_type)
+ session_disconnected_reply_msg_t *rmp;
+ vnet_disconnect_args_t _a, *a = &_a;
+ svm_msg_q_msg_t _msg, *msg = &_msg;
+ session_disconnected_msg_t *mp;
+ app_worker_t *app_wrk;
+ session_event_t *evt;
+ session_t *s;
+ application_t *app;
+ int rv = 0;
+
+ mp = (session_disconnected_msg_t *) data;
+ if (!(s = session_get_from_handle_if_valid (mp->handle)))
{
- case FIFO_EVENT_APP_RX:
- case FIFO_EVENT_APP_TX:
- case FIFO_EVENT_BUILTIN_RX:
- if (e->fifo == f)
- return 1;
- break;
- case FIFO_EVENT_DISCONNECT:
- break;
- case FIFO_EVENT_RPC:
- s = session_get_from_handle (e->session_handle);
- if (!s)
- {
- clib_warning ("session has event but doesn't exist!");
- break;
- }
- if (s->server_rx_fifo == f || s->server_tx_fifo == f)
- return 1;
- break;
- default:
- break;
+ clib_warning ("could not disconnect handle %llu", mp->handle);
+ return;
}
- return 0;
+ app_wrk = app_worker_get (s->app_wrk_index);
+ app = application_lookup (mp->client_index);
+ if (!(app_wrk && app && app->app_index == app_wrk->app_index))
+ {
+ clib_warning ("could not disconnect session: %llu app: %u",
+ mp->handle, mp->client_index);
+ return;
+ }
+
+ a->handle = mp->handle;
+ a->app_index = app_wrk->wrk_index;
+ rv = vnet_disconnect_session (a);
+
+ svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
+ SESSION_MQ_CTRL_EVT_RING,
+ SVM_Q_WAIT, msg);
+ evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
+ rmp = (session_disconnected_reply_msg_t *) evt->data;
+ rmp->handle = mp->handle;
+ rmp->context = mp->context;
+ rmp->retval = rv;
+ svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
}
-u8
-session_node_lookup_fifo_event (svm_fifo_t * f, session_fifo_event_t * e)
+static void
+session_mq_disconnected_reply_handler (void *data)
{
- session_manager_main_t *smm = vnet_get_session_manager_main ();
- unix_shared_memory_queue_t *q;
- session_fifo_event_t *pending_event_vector, *evt;
- int i, index, found = 0;
- i8 *headp;
- u8 thread_index;
+ session_disconnected_reply_msg_t *mp;
+ vnet_disconnect_args_t _a, *a = &_a;
+ application_t *app;
- ASSERT (e);
- thread_index = f->master_thread_index;
- /*
- * Search evt queue
- */
- q = smm->vpp_event_queues[thread_index];
- index = q->head;
- for (i = 0; i < q->cursize; i++)
- {
- headp = (i8 *) (&q->data[0] + q->elsize * index);
- clib_memcpy (e, headp, q->elsize);
- found = session_node_cmp_event (e, f);
- if (found)
- break;
- if (++index == q->maxsize)
- index = 0;
+ mp = (session_disconnected_reply_msg_t *) data;
+
+ /* Client objected to disconnecting the session, log and continue */
+ if (mp->retval)
+ {
+ clib_warning ("client retval %d", mp->retval);
+ return;
+ }
+
+ /* Disconnect has been confirmed. Confirm close to transport */
+ app = application_lookup (mp->context);
+ if (app)
+ {
+ a->handle = mp->handle;
+ a->app_index = app->app_index;
+ vnet_disconnect_session (a);
}
- /*
- * Search pending events vector
- */
- pending_event_vector = smm->pending_event_vector[thread_index];
- vec_foreach (evt, pending_event_vector)
- {
- found = session_node_cmp_event (evt, f);
- if (found)
- {
- clib_memcpy (e, evt, sizeof (*evt));
- break;
- }
- }
- return found;
}
-static uword
-session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+static void
+session_mq_worker_update_handler (void *data)
{
- session_manager_main_t *smm = vnet_get_session_manager_main ();
- session_fifo_event_t *my_pending_event_vector, *pending_disconnects, *e;
- session_fifo_event_t *my_fifo_events;
- u32 n_to_dequeue, n_events;
- unix_shared_memory_queue_t *q;
+ session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
+ session_worker_update_reply_msg_t *rmp;
+ svm_msg_q_msg_t _msg, *msg = &_msg;
+ app_worker_t *app_wrk;
+ u32 owner_app_wrk_map;
+ session_event_t *evt;
+ session_t *s;
application_t *app;
- int n_tx_packets = 0;
- u32 my_thread_index = vm->thread_index;
- int i, rv;
- f64 now = vlib_time_now (vm);
- void (*fp) (void *);
- SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, my_thread_index);
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
+ if (!(s = session_get_from_handle_if_valid (mp->handle)))
+ {
+ clib_warning ("invalid handle %llu", mp->handle);
+ return;
+ }
+ app_wrk = app_worker_get (s->app_wrk_index);
+ if (app_wrk->app_index != app->app_index)
+ {
+ clib_warning ("app %u does not own session %llu", app->app_index,
+ mp->handle);
+ return;
+ }
+ owner_app_wrk_map = app_wrk->wrk_map_index;
+ app_wrk = application_get_worker (app, mp->wrk_index);
+
+ /* This needs to come from the new owner */
+ if (mp->req_wrk_index == owner_app_wrk_map)
+ {
+ session_req_worker_update_msg_t *wump;
+
+ svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
+ SESSION_MQ_CTRL_EVT_RING,
+ SVM_Q_WAIT, msg);
+ evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
+ wump = (session_req_worker_update_msg_t *) evt->data;
+ wump->session_handle = mp->handle;
+ svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
+ return;
+ }
+
+ app_worker_own_session (app_wrk, s);
/*
- * Update TCP time
+ * Send reply
*/
- tcp_update_time (now, my_thread_index);
+ svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
+ SESSION_MQ_CTRL_EVT_RING,
+ SVM_Q_WAIT, msg);
+ evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
+ rmp = (session_worker_update_reply_msg_t *) evt->data;
+ rmp->handle = mp->handle;
+ if (s->rx_fifo)
+ rmp->rx_fifo = fifo_segment_fifo_offset (s->rx_fifo);
+ if (s->tx_fifo)
+ rmp->tx_fifo = fifo_segment_fifo_offset (s->tx_fifo);
+ rmp->segment_handle = session_segment_handle (s);
+ svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
/*
- * Get vpp queue events
+ * Retransmit messages that may have been lost
*/
- q = smm->vpp_event_queues[my_thread_index];
- if (PREDICT_FALSE (q == 0))
- return 0;
+ if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
+ session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
- my_fifo_events = smm->free_event_vector[my_thread_index];
+ if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
+ app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
- /* min number of events we can dequeue without blocking */
- n_to_dequeue = q->cursize;
- my_pending_event_vector = smm->pending_event_vector[my_thread_index];
- pending_disconnects = smm->pending_disconnects[my_thread_index];
+ if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
+ app_worker_close_notify (app_wrk, s);
+}
- if (!n_to_dequeue && !vec_len (my_pending_event_vector)
- && !vec_len (pending_disconnects))
- return 0;
+static void
+session_mq_app_wrk_rpc_handler (void *data)
+{
+ session_app_wrk_rpc_msg_t *mp = (session_app_wrk_rpc_msg_t *) data;
+ svm_msg_q_msg_t _msg, *msg = &_msg;
+ session_app_wrk_rpc_msg_t *rmp;
+ app_worker_t *app_wrk;
+ session_event_t *evt;
+ application_t *app;
- SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
+
+ app_wrk = application_get_worker (app, mp->wrk_index);
+
+ svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
+ SESSION_MQ_CTRL_EVT_RING, SVM_Q_WAIT,
+ msg);
+ evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->event_type = SESSION_CTRL_EVT_APP_WRK_RPC;
+ rmp = (session_app_wrk_rpc_msg_t *) evt->data;
+ clib_memcpy (rmp->data, mp->data, sizeof (mp->data));
+ svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
+}
- /*
- * If we didn't manage to process previous events try going
- * over them again without dequeuing new ones.
- */
- /* XXX: Block senders to sessions that can't keep up */
- if (0 && vec_len (my_pending_event_vector) >= 100)
- {
- clib_warning ("too many fifo events unsolved");
- goto skip_dequeue;
- }
+static void
+session_mq_transport_attr_handler (void *data)
+{
+ session_transport_attr_msg_t *mp = (session_transport_attr_msg_t *) data;
+ session_transport_attr_reply_msg_t *rmp;
+ svm_msg_q_msg_t _msg, *msg = &_msg;
+ app_worker_t *app_wrk;
+ session_event_t *evt;
+ application_t *app;
+ session_t *s;
+ int rv;
- /* See you in the next life, don't be late */
- if (pthread_mutex_trylock (&q->mutex))
- return 0;
+ app = application_lookup (mp->client_index);
+ if (!app)
+ return;
- for (i = 0; i < n_to_dequeue; i++)
+ if (!(s = session_get_from_handle_if_valid (mp->handle)))
{
- vec_add2 (my_fifo_events, e, 1);
- unix_shared_memory_queue_sub_raw (q, (u8 *) e);
+ clib_warning ("invalid handle %llu", mp->handle);
+ return;
+ }
+ app_wrk = app_worker_get (s->app_wrk_index);
+ if (app_wrk->app_index != app->app_index)
+ {
+ clib_warning ("app %u does not own session %llu", app->app_index,
+ mp->handle);
+ return;
}
- /* The other side of the connection is not polling */
- if (q->cursize < (q->maxsize / 8))
- (void) pthread_cond_broadcast (&q->condvar);
- pthread_mutex_unlock (&q->mutex);
+ rv = session_transport_attribute (s, mp->is_get, &mp->attr);
+
+ svm_msg_q_lock_and_alloc_msg_w_ring (
+ app_wrk->event_queue, SESSION_MQ_CTRL_EVT_RING, SVM_Q_WAIT, msg);
+ evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
+ clib_memset (evt, 0, sizeof (*evt));
+ evt->event_type = SESSION_CTRL_EVT_TRANSPORT_ATTR_REPLY;
+ rmp = (session_transport_attr_reply_msg_t *) evt->data;
+ rmp->handle = mp->handle;
+ rmp->retval = rv;
+ rmp->is_get = mp->is_get;
+ if (!rv && mp->is_get)
+ rmp->attr = mp->attr;
+ svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
+}
- vec_append (my_fifo_events, my_pending_event_vector);
- vec_append (my_fifo_events, smm->pending_disconnects[my_thread_index]);
+void
+session_wrk_handle_evts_main_rpc (void *args)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ clib_llist_index_t ei, next_ei;
+ session_evt_elt_t *he, *elt;
+ session_worker_t *fwrk;
+ u32 thread_index;
- _vec_len (my_pending_event_vector) = 0;
- smm->pending_event_vector[my_thread_index] = my_pending_event_vector;
- _vec_len (smm->pending_disconnects[my_thread_index]) = 0;
+ vlib_worker_thread_barrier_sync (vm);
-skip_dequeue:
- n_events = vec_len (my_fifo_events);
- for (i = 0; i < n_events; i++)
- {
- stream_session_t *s0; /* $$$ prefetch 1 ahead maybe */
- session_fifo_event_t *e0;
+ thread_index = pointer_to_uword (args);
+ fwrk = session_main_get_worker (thread_index);
- e0 = &my_fifo_events[i];
+ he = clib_llist_elt (fwrk->event_elts, fwrk->evts_pending_main);
+ ei = clib_llist_next_index (he, evt_list);
- switch (e0->event_type)
+ while (ei != fwrk->evts_pending_main)
+ {
+ elt = clib_llist_elt (fwrk->event_elts, ei);
+ next_ei = clib_llist_next_index (elt, evt_list);
+ clib_llist_remove (fwrk->event_elts, evt_list, elt);
+ switch (elt->evt.event_type)
{
- case FIFO_EVENT_APP_TX:
- s0 = session_event_get_session (e0, my_thread_index);
-
- if (PREDICT_FALSE (!s0))
- {
- clib_warning ("It's dead, Jim!");
- continue;
- }
- /* Can retransmit for closed sessions but can't do anything if
- * session is not ready or closed */
- if (PREDICT_FALSE (s0->session_state < SESSION_STATE_READY))
- continue;
- /* Spray packets in per session type frames, since they go to
- * different nodes */
- rv = (smm->session_tx_fns[s0->session_type]) (vm, node, smm, e0, s0,
- my_thread_index,
- &n_tx_packets);
- /* Out of buffers */
- if (PREDICT_FALSE (rv < 0))
- {
- vlib_node_increment_counter (vm, node->node_index,
- SESSION_QUEUE_ERROR_NO_BUFFER, 1);
- continue;
- }
+ case SESSION_CTRL_EVT_LISTEN:
+ session_mq_listen_handler (fwrk, elt);
break;
- case FIFO_EVENT_DISCONNECT:
- /* Make sure disconnects run after the pending list is drained */
- if (!e0->postponed)
- {
- e0->postponed = 1;
- vec_add1 (smm->pending_disconnects[my_thread_index], *e0);
- continue;
- }
- s0 = session_get_from_handle (e0->session_handle);
- stream_session_disconnect (s0);
+ case SESSION_CTRL_EVT_UNLISTEN:
+ session_mq_unlisten_handler (fwrk, elt);
break;
- case FIFO_EVENT_BUILTIN_RX:
- s0 = session_event_get_session (e0, my_thread_index);
- if (PREDICT_FALSE (!s0))
- continue;
- svm_fifo_unset_event (s0->server_rx_fifo);
- app = application_get (s0->app_index);
- app->cb_fns.builtin_server_rx_callback (s0);
+ case SESSION_CTRL_EVT_APP_DETACH:
+ app_mq_detach_handler (fwrk, elt);
break;
- case FIFO_EVENT_RPC:
- fp = e0->rpc_args.fp;
- (*fp) (e0->rpc_args.arg);
+ case SESSION_CTRL_EVT_CONNECT_URI:
+ session_mq_connect_uri_handler (fwrk, elt);
+ break;
+ case SESSION_CTRL_EVT_ACCEPTED_REPLY:
+ session_mq_accepted_reply_handler (fwrk, elt);
+ break;
+ case SESSION_CTRL_EVT_CONNECT:
+ session_mq_connect_handler (fwrk, elt);
break;
-
default:
- clib_warning ("unhandled event type %d", e0->event_type);
+ clib_warning ("unhandled %u", elt->evt.event_type);
+ ALWAYS_ASSERT (0);
+ break;
}
- }
-
- _vec_len (my_fifo_events) = 0;
- smm->free_event_vector[my_thread_index] = my_fifo_events;
- vlib_node_increment_counter (vm, session_queue_node.index,
- SESSION_QUEUE_ERROR_TX, n_tx_packets);
-
- SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 1);
+ /* Regrab element in case pool moved */
+ elt = clib_llist_elt (fwrk->event_elts, ei);
+ if (!clib_llist_elt_is_linked (elt, evt_list))
+ {
+ session_evt_ctrl_data_free (fwrk, elt);
+ clib_llist_put (fwrk->event_elts, elt);
+ }
+ ei = next_ei;
+ }
- return n_tx_packets;
+ vlib_worker_thread_barrier_release (vm);
}
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (session_queue_node) =
+vlib_node_registration_t session_queue_node;
+
+typedef struct
+{
+ u32 session_index;
+ u32 server_thread_index;
+} session_queue_trace_t;
+
+/* packet trace format function */
+static u8 *
+format_session_queue_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
+
+ s = format (s, "session index %d thread index %d",
+ t->session_index, t->server_thread_index);
+ return s;
+}
+
+#define foreach_session_queue_error \
+ _ (TX, tx, INFO, "Packets transmitted") \
+ _ (TIMER, timer, INFO, "Timer events") \
+ _ (NO_BUFFER, no_buffer, ERROR, "Out of buffers")
+
+typedef enum
+{
+#define _(f, n, s, d) SESSION_QUEUE_ERROR_##f,
+ foreach_session_queue_error
+#undef _
+ SESSION_QUEUE_N_ERROR,
+} session_queue_error_t;
+
+static vlib_error_desc_t session_error_counters[] = {
+#define _(f, n, s, d) { #n, d, VL_COUNTER_SEVERITY_##s },
+ foreach_session_queue_error
+#undef _
+};
+
+enum
+{
+ SESSION_TX_NO_BUFFERS = -2,
+ SESSION_TX_NO_DATA,
+ SESSION_TX_OK
+};
+
+static void
+session_tx_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
+ u32 next_index, vlib_buffer_t **bufs, u16 n_segs,
+ session_t *s, u32 n_trace)
+{
+ vlib_buffer_t **b = bufs;
+
+ while (n_trace && n_segs)
+ {
+ if (PREDICT_TRUE (vlib_trace_buffer (vm, node, next_index, b[0],
+ 1 /* follow_chain */)))
+ {
+ session_queue_trace_t *t =
+ vlib_add_trace (vm, node, b[0], sizeof (*t));
+ t->session_index = s->session_index;
+ t->server_thread_index = s->thread_index;
+ n_trace--;
+ }
+ b++;
+ n_segs--;
+ }
+ vlib_set_trace_count (vm, node, n_trace);
+}
+
+always_inline int
+session_tx_fill_dma_transfers (session_worker_t *wrk,
+ session_tx_context_t *ctx, vlib_buffer_t *b)
+{
+ vlib_main_t *vm = wrk->vm;
+ u32 len_to_deq;
+ u8 *data0 = NULL;
+ int n_bytes_read, len_write;
+ svm_fifo_seg_t data_fs[2];
+
+ u32 n_segs = 2;
+ u16 n_transfers = 0;
+ /*
+ * Start with the first buffer in chain
+ */
+ b->error = 0;
+ b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ b->current_data = 0;
+ data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
+ len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
+
+ n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset,
+ data_fs, &n_segs, len_to_deq);
+
+ len_write = n_bytes_read;
+ ASSERT (n_bytes_read == len_to_deq);
+
+ while (n_bytes_read)
+ {
+ wrk->batch_num++;
+ vlib_dma_batch_add (vm, wrk->batch, data0, data_fs[n_transfers].data,
+ data_fs[n_transfers].len);
+ data0 += data_fs[n_transfers].len;
+ n_bytes_read -= data_fs[n_transfers].len;
+ n_transfers++;
+ }
+ return len_write;
+}
+
+always_inline int
+session_tx_fill_dma_transfers_tail (session_worker_t *wrk,
+ session_tx_context_t *ctx,
+ vlib_buffer_t *b, u32 len_to_deq, u8 *data)
+{
+ vlib_main_t *vm = wrk->vm;
+ int n_bytes_read, len_write;
+ svm_fifo_seg_t data_fs[2];
+ u32 n_segs = 2;
+ u16 n_transfers = 0;
+
+ n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset,
+ data_fs, &n_segs, len_to_deq);
+
+ len_write = n_bytes_read;
+
+ ASSERT (n_bytes_read == len_to_deq);
+
+ while (n_bytes_read)
+ {
+ wrk->batch_num++;
+ vlib_dma_batch_add (vm, wrk->batch, data, data_fs[n_transfers].data,
+ data_fs[n_transfers].len);
+ data += data_fs[n_transfers].len;
+ n_bytes_read -= data_fs[n_transfers].len;
+ n_transfers++;
+ }
+
+ return len_write;
+}
+
+always_inline int
+session_tx_copy_data (session_worker_t *wrk, session_tx_context_t *ctx,
+ vlib_buffer_t *b, u32 len_to_deq, u8 *data0)
+{
+ int n_bytes_read;
+ if (PREDICT_TRUE (!wrk->dma_enabled))
+ n_bytes_read =
+ svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data0);
+ else
+ n_bytes_read = session_tx_fill_dma_transfers (wrk, ctx, b);
+ return n_bytes_read;
+}
+
+always_inline int
+session_tx_copy_data_tail (session_worker_t *wrk, session_tx_context_t *ctx,
+ vlib_buffer_t *b, u32 len_to_deq, u8 *data)
+{
+ int n_bytes_read;
+ if (PREDICT_TRUE (!wrk->dma_enabled))
+ n_bytes_read =
+ svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data);
+ else
+ n_bytes_read =
+ session_tx_fill_dma_transfers_tail (wrk, ctx, b, len_to_deq, data);
+ return n_bytes_read;
+}
+
+always_inline void
+session_tx_fifo_chain_tail (session_worker_t *wrk, session_tx_context_t *ctx,
+ vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
+{
+ vlib_main_t *vm = wrk->vm;
+ vlib_buffer_t *chain_b, *prev_b;
+ u32 chain_bi0, to_deq, left_from_seg;
+ int len_to_deq, n_bytes_read;
+ u8 *data, j;
+
+ b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ b->total_length_not_including_first_buffer = 0;
+
+ chain_b = b;
+ left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length,
+ ctx->left_to_snd);
+ to_deq = left_from_seg;
+ for (j = 1; j < ctx->n_bufs_per_seg; j++)
+ {
+ prev_b = chain_b;
+ len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
+
+ *n_bufs -= 1;
+ chain_bi0 = ctx->tx_buffers[*n_bufs];
+ chain_b = vlib_get_buffer (vm, chain_bi0);
+ chain_b->current_data = 0;
+ data = vlib_buffer_get_current (chain_b);
+ if (peek_data)
+ {
+ n_bytes_read =
+ session_tx_copy_data_tail (wrk, ctx, b, len_to_deq, data);
+ ctx->sp.tx_offset += n_bytes_read;
+ }
+ else
+ {
+ if (ctx->transport_vft->transport_options.tx_type ==
+ TRANSPORT_TX_DGRAM)
+ {
+ svm_fifo_t *f = ctx->s->tx_fifo;
+ session_dgram_hdr_t *hdr = &ctx->hdr;
+ u16 deq_now;
+ u32 offset;
+
+ deq_now = clib_min (hdr->data_length - hdr->data_offset,
+ len_to_deq);
+ offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
+ n_bytes_read = svm_fifo_peek (f, offset, deq_now, data);
+ ASSERT (n_bytes_read > 0);
+
+ hdr->data_offset += n_bytes_read;
+ if (hdr->data_offset == hdr->data_length)
+ {
+ offset = hdr->data_length + SESSION_CONN_HDR_LEN;
+ svm_fifo_dequeue_drop (f, offset);
+ if (ctx->left_to_snd > n_bytes_read)
+ svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
+ (u8 *) & ctx->hdr);
+ }
+ else if (ctx->left_to_snd == n_bytes_read)
+ svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
+ sizeof (session_dgram_pre_hdr_t));
+ }
+ else
+ n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
+ len_to_deq, data);
+ }
+ ASSERT (n_bytes_read == len_to_deq);
+ chain_b->current_length = n_bytes_read;
+ b->total_length_not_including_first_buffer += chain_b->current_length;
+
+ /* update previous buffer */
+ prev_b->next_buffer = chain_bi0;
+ prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
+
+ /* update current buffer */
+ chain_b->next_buffer = 0;
+
+ to_deq -= n_bytes_read;
+ if (to_deq == 0)
+ break;
+ }
+ ASSERT (to_deq == 0
+ && b->total_length_not_including_first_buffer == left_from_seg);
+ ctx->left_to_snd -= left_from_seg;
+}
+
+always_inline void
+session_tx_fill_buffer (session_worker_t *wrk, session_tx_context_t *ctx,
+ vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
+{
+ u32 len_to_deq;
+ u8 *data0;
+ int n_bytes_read;
+ /*
+ * Start with the first buffer in chain
+ */
+ b->error = 0;
+ b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ b->current_data = 0;
+
+ data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
+ len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
+
+ if (peek_data)
+ {
+ n_bytes_read = session_tx_copy_data (wrk, ctx, b, len_to_deq, data0);
+ ASSERT (n_bytes_read > 0);
+ /* Keep track of progress locally, transport is also supposed to
+ * increment it independently when pushing the header */
+ ctx->sp.tx_offset += n_bytes_read;
+ }
+ else
+ {
+ if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
+ {
+ session_dgram_hdr_t *hdr = &ctx->hdr;
+ svm_fifo_t *f = ctx->s->tx_fifo;
+ u16 deq_now;
+ u32 offset;
+
+ ASSERT (hdr->data_length > hdr->data_offset);
+ deq_now = clib_min (hdr->data_length - hdr->data_offset,
+ len_to_deq);
+ offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
+ n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
+ ASSERT (n_bytes_read > 0);
+
+ if (transport_connection_is_cless (ctx->tc))
+ {
+ ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
+ ip_copy (&ctx->tc->lcl_ip, &hdr->lcl_ip, ctx->tc->is_ip4);
+ /* Local port assumed to be bound, not overwriting it */
+ ctx->tc->rmt_port = hdr->rmt_port;
+ }
+ hdr->data_offset += n_bytes_read;
+ if (hdr->data_offset == hdr->data_length)
+ {
+ offset = hdr->data_length + SESSION_CONN_HDR_LEN;
+ svm_fifo_dequeue_drop (f, offset);
+ if (ctx->left_to_snd > n_bytes_read)
+ svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
+ (u8 *) & ctx->hdr);
+ }
+ else if (ctx->left_to_snd == n_bytes_read)
+ svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
+ sizeof (session_dgram_pre_hdr_t));
+ }
+ else
+ {
+ n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
+ len_to_deq, data0);
+ ASSERT (n_bytes_read > 0);
+ }
+ }
+
+ b->current_length = n_bytes_read;
+ ctx->left_to_snd -= n_bytes_read;
+
+ /*
+ * Fill in the remaining buffers in the chain, if any
+ */
+ if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
+ session_tx_fifo_chain_tail (wrk, ctx, b, n_bufs, peek_data);
+}
+
+always_inline u8
+session_tx_not_ready (session_t * s, u8 peek_data)
+{
+ if (peek_data)
+ {
+ if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
+ return 0;
+ /* Can retransmit for closed sessions but can't send new data if
+ * session is not ready or closed */
+ else if (s->session_state < SESSION_STATE_READY)
+ {
+ /* Allow accepting session to send custom packets.
+ * For instance, tcp want to send acks in established, but
+ * the app has not called accept() yet */
+ if (s->session_state == SESSION_STATE_ACCEPTING &&
+ (s->flags & SESSION_F_CUSTOM_TX))
+ return 0;
+ return 1;
+ }
+ else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
+ {
+ /* Allow closed transports to still send custom packets.
+ * For instance, tcp may want to send acks in time-wait. */
+ if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
+ && (s->flags & SESSION_F_CUSTOM_TX))
+ return 0;
+ return 2;
+ }
+ }
+ else
+ {
+ if (s->session_state == SESSION_STATE_TRANSPORT_DELETED)
+ return 2;
+ }
+ return 0;
+}
+
+always_inline transport_connection_t *
+session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
+{
+ if (peek_data)
+ {
+ return ctx->transport_vft->get_connection (ctx->s->connection_index,
+ ctx->s->thread_index);
+ }
+ else
+ {
+ if (ctx->s->session_state == SESSION_STATE_LISTENING)
+ return ctx->transport_vft->get_listener (ctx->s->connection_index);
+ else
+ {
+ return ctx->transport_vft->get_connection (ctx->s->connection_index,
+ ctx->s->thread_index);
+ }
+ }
+}
+
+always_inline void
+session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
+ u32 max_segs, u8 peek_data)
+{
+ u32 n_bytes_per_buf, n_bytes_per_seg;
+
+ n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
+ ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
+
+ if (peek_data)
+ {
+ /* Offset in rx fifo from where to peek data */
+ if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue))
+ {
+ ctx->max_len_to_snd = 0;
+ return;
+ }
+ ctx->max_dequeue -= ctx->sp.tx_offset;
+ }
+ else
+ {
+ if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
+ {
+ u32 len, chain_limit;
+
+ if (ctx->max_dequeue <= sizeof (ctx->hdr))
+ {
+ ctx->max_len_to_snd = 0;
+ return;
+ }
+
+ svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
+ (u8 *) & ctx->hdr);
+ /* Zero length dgrams not supported */
+ if (PREDICT_FALSE (ctx->hdr.data_length == 0))
+ {
+ svm_fifo_dequeue_drop (ctx->s->tx_fifo, sizeof (ctx->hdr));
+ ctx->max_len_to_snd = 0;
+ return;
+ }
+ ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
+ len = ctx->hdr.data_length - ctx->hdr.data_offset;
+
+ if (ctx->hdr.gso_size)
+ {
+ ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, ctx->hdr.gso_size);
+ }
+
+ /* Process multiple dgrams if smaller than min (buf_space, mss).
+ * This avoids handling multiple dgrams if they require buffer
+ * chains */
+ chain_limit = clib_min (n_bytes_per_buf - TRANSPORT_MAX_HDRS_LEN,
+ ctx->sp.snd_mss);
+ if (ctx->hdr.data_length <= chain_limit)
+ {
+ u32 first_dgram_len, dgram_len, offset, max_offset;
+ session_dgram_hdr_t hdr;
+
+ ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, len);
+ offset = ctx->hdr.data_length + sizeof (session_dgram_hdr_t);
+ first_dgram_len = len;
+ max_offset = clib_min (ctx->max_dequeue, 16 << 10);
+
+ while (offset < max_offset)
+ {
+ svm_fifo_peek (ctx->s->tx_fifo, offset, sizeof (ctx->hdr),
+ (u8 *) & hdr);
+ dgram_len = hdr.data_length - hdr.data_offset;
+ if (offset + sizeof (hdr) + hdr.data_length >
+ ctx->max_dequeue ||
+ first_dgram_len != dgram_len)
+ break;
+ /* Assert here to allow test above with zero length dgrams */
+ ASSERT (hdr.data_length > hdr.data_offset);
+ len += dgram_len;
+ offset += sizeof (hdr) + hdr.data_length;
+ }
+ }
+
+ ctx->max_dequeue = len;
+ }
+ }
+ ASSERT (ctx->max_dequeue > 0);
+
+ /* Ensure we're not writing more than transport window allows */
+ if (ctx->max_dequeue < ctx->sp.snd_space)
+ {
+ /* Constrained by tx queue. Try to send only fully formed segments */
+ ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ?
+ (ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) :
+ ctx->max_dequeue;
+ /* TODO Nagle ? */
+ }
+ else
+ {
+ /* Expectation is that snd_space0 is already a multiple of snd_mss */
+ ctx->max_len_to_snd = ctx->sp.snd_space;
+ }
+
+ /* Check if we're tx constrained by the node */
+ ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss);
+ if (ctx->n_segs_per_evt > max_segs)
+ {
+ ctx->n_segs_per_evt = max_segs;
+ ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss;
+ }
+
+ ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
+ if (ctx->n_segs_per_evt > 1)
+ {
+ u32 n_bytes_last_seg, n_bufs_last_seg;
+
+ n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
+ n_bytes_last_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd
+ - ((ctx->n_segs_per_evt - 1) * ctx->sp.snd_mss);
+ ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
+ n_bufs_last_seg = ceil ((f64) n_bytes_last_seg / n_bytes_per_buf);
+ ctx->n_bufs_needed = ((ctx->n_segs_per_evt - 1) * ctx->n_bufs_per_seg)
+ + n_bufs_last_seg;
+ }
+ else
+ {
+ n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd;
+ ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
+ ctx->n_bufs_needed = ctx->n_bufs_per_seg;
+ }
+
+ ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf);
+ ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss,
+ n_bytes_per_buf -
+ TRANSPORT_MAX_HDRS_LEN);
+}
+
+always_inline void
+session_tx_maybe_reschedule (session_worker_t * wrk,
+ session_tx_context_t * ctx,
+ session_evt_elt_t * elt)
+{
+ session_t *s = ctx->s;
+
+ svm_fifo_unset_event (s->tx_fifo);
+ if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset)
+ {
+ if (svm_fifo_set_event (s->tx_fifo))
+ session_evt_add_head_old (wrk, elt);
+ }
+ else
+ {
+ transport_connection_deschedule (ctx->tc);
+ }
+}
+
+always_inline void
+session_tx_add_pending_buffer (session_worker_t *wrk, u32 bi, u32 next_index)
+{
+ if (PREDICT_TRUE (!wrk->dma_enabled))
+ {
+ vec_add1 (wrk->pending_tx_buffers, bi);
+ vec_add1 (wrk->pending_tx_nexts, next_index);
+ }
+ else
+ {
+ session_dma_transfer *dma_transfer = &wrk->dma_trans[wrk->trans_tail];
+ vec_add1 (dma_transfer->pending_tx_buffers, bi);
+ vec_add1 (dma_transfer->pending_tx_nexts, next_index);
+ }
+}
+
+always_inline int
+session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * elt,
+ int *n_tx_packets, u8 peek_data)
+{
+ u32 n_trace, n_left, pbi, next_index, max_burst;
+ session_tx_context_t *ctx = &wrk->ctx;
+ session_main_t *smm = &session_main;
+ session_event_t *e = &elt->evt;
+ vlib_main_t *vm = wrk->vm;
+ transport_proto_t tp;
+ vlib_buffer_t *pb;
+ u16 n_bufs, rv;
+
+ if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
+ {
+ if (rv < 2)
+ session_evt_add_old (wrk, elt);
+ return SESSION_TX_NO_DATA;
+ }
+
+ next_index = smm->session_type_to_next[ctx->s->session_type];
+ max_burst = SESSION_NODE_FRAME_SIZE - *n_tx_packets;
+
+ tp = session_get_transport_proto (ctx->s);
+ ctx->transport_vft = transport_protocol_get_vft (tp);
+ ctx->tc = session_tx_get_transport (ctx, peek_data);
+
+ if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
+ {
+ if (ctx->transport_vft->flush_data)
+ ctx->transport_vft->flush_data (ctx->tc);
+ e->event_type = SESSION_IO_EVT_TX;
+ }
+
+ if (ctx->s->flags & SESSION_F_CUSTOM_TX)
+ {
+ u32 n_custom_tx;
+ ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
+ ctx->sp.max_burst_size = max_burst;
+ n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, &ctx->sp);
+ *n_tx_packets += n_custom_tx;
+ if (PREDICT_FALSE
+ (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
+ return SESSION_TX_OK;
+ max_burst -= n_custom_tx;
+ if (!max_burst || (ctx->s->flags & SESSION_F_CUSTOM_TX))
+ {
+ session_evt_add_old (wrk, elt);
+ return SESSION_TX_OK;
+ }
+ }
+
+ /* Connection previously descheduled because it had no data to send.
+ * Clear descheduled flag and reset pacer if in use */
+ if (transport_connection_is_descheduled (ctx->tc))
+ transport_connection_clear_descheduled (ctx->tc);
+
+ transport_connection_snd_params (ctx->tc, &ctx->sp);
+
+ if (!ctx->sp.snd_space)
+ {
+ /* If the deschedule flag was set, remove session from scheduler.
+ * Transport is responsible for rescheduling this session. */
+ if (ctx->sp.flags & TRANSPORT_SND_F_DESCHED)
+ transport_connection_deschedule (ctx->tc);
+ /* Request to postpone the session, e.g., zero-wnd and transport
+ * is not currently probing */
+ else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE)
+ session_evt_add_old (wrk, elt);
+ /* This flow queue is "empty" so it should be re-evaluated before
+ * the ones that have data to send. */
+ else
+ session_evt_add_head_old (wrk, elt);
+
+ return SESSION_TX_NO_DATA;
+ }
+
+ if (transport_connection_is_tx_paced (ctx->tc))
+ {
+ u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
+ if (snd_space < TRANSPORT_PACER_MIN_BURST)
+ {
+ session_evt_add_head_old (wrk, elt);
+ return SESSION_TX_NO_DATA;
+ }
+ snd_space = clib_min (ctx->sp.snd_space, snd_space);
+ ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ?
+ snd_space - snd_space % ctx->sp.snd_mss : snd_space;
+ }
+
+ /* Check how much we can pull. */
+ session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
+
+ if (PREDICT_FALSE (!ctx->max_len_to_snd))
+ {
+ transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
+ session_tx_maybe_reschedule (wrk, ctx, elt);
+ return SESSION_TX_NO_DATA;
+ }
+
+ vec_validate_aligned (ctx->tx_buffers, ctx->n_bufs_needed - 1,
+ CLIB_CACHE_LINE_BYTES);
+ n_bufs = vlib_buffer_alloc (vm, ctx->tx_buffers, ctx->n_bufs_needed);
+ if (PREDICT_FALSE (n_bufs < ctx->n_bufs_needed))
+ {
+ if (n_bufs)
+ vlib_buffer_free (vm, ctx->tx_buffers, n_bufs);
+ session_evt_add_head_old (wrk, elt);
+ vlib_node_increment_counter (wrk->vm, node->node_index,
+ SESSION_QUEUE_ERROR_NO_BUFFER, 1);
+ return SESSION_TX_NO_BUFFERS;
+ }
+
+ if (transport_connection_is_tx_paced (ctx->tc))
+ transport_connection_tx_pacer_update_bytes (ctx->tc, ctx->max_len_to_snd);
+
+ ctx->left_to_snd = ctx->max_len_to_snd;
+ n_left = ctx->n_segs_per_evt;
+
+ vec_validate (ctx->transport_pending_bufs, n_left);
+
+ while (n_left >= 4)
+ {
+ vlib_buffer_t *b0, *b1;
+ u32 bi0, bi1;
+
+ pbi = ctx->tx_buffers[n_bufs - 3];
+ pb = vlib_get_buffer (vm, pbi);
+ vlib_prefetch_buffer_header (pb, STORE);
+ pbi = ctx->tx_buffers[n_bufs - 4];
+ pb = vlib_get_buffer (vm, pbi);
+ vlib_prefetch_buffer_header (pb, STORE);
+
+ bi0 = ctx->tx_buffers[--n_bufs];
+ bi1 = ctx->tx_buffers[--n_bufs];
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data);
+ session_tx_fill_buffer (wrk, ctx, b1, &n_bufs, peek_data);
+
+ ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0;
+ ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left + 1] = b1;
+ n_left -= 2;
+
+ session_tx_add_pending_buffer (wrk, bi0, next_index);
+ session_tx_add_pending_buffer (wrk, bi1, next_index);
+ }
+ while (n_left)
+ {
+ vlib_buffer_t *b0;
+ u32 bi0;
+
+ if (n_left > 1)
+ {
+ pbi = ctx->tx_buffers[n_bufs - 2];
+ pb = vlib_get_buffer (vm, pbi);
+ vlib_prefetch_buffer_header (pb, STORE);
+ }
+
+ bi0 = ctx->tx_buffers[--n_bufs];
+ b0 = vlib_get_buffer (vm, bi0);
+ session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data);
+
+ ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0;
+ n_left -= 1;
+
+ session_tx_add_pending_buffer (wrk, bi0, next_index);
+ }
+
+ /* Ask transport to push headers */
+ ctx->transport_vft->push_header (ctx->tc, ctx->transport_pending_bufs,
+ ctx->n_segs_per_evt);
+
+ if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
+ session_tx_trace_frame (vm, node, next_index, ctx->transport_pending_bufs,
+ ctx->n_segs_per_evt, ctx->s, n_trace);
+
+ if (PREDICT_FALSE (n_bufs))
+ vlib_buffer_free (vm, ctx->tx_buffers, n_bufs);
+
+ *n_tx_packets += ctx->n_segs_per_evt;
+
+ SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
+ ctx->s->tx_fifo->shr->has_event, wrk->last_vlib_time);
+
+ ASSERT (ctx->left_to_snd == 0);
+
+ /* If we couldn't dequeue all bytes reschedule as old flow. Otherwise,
+ * check if application enqueued more data and reschedule accordingly */
+ if (ctx->max_len_to_snd < ctx->max_dequeue)
+ session_evt_add_old (wrk, elt);
+ else
+ session_tx_maybe_reschedule (wrk, ctx, elt);
+
+ if (!peek_data)
+ {
+ u32 n_dequeued = ctx->max_len_to_snd;
+ if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
+ n_dequeued += ctx->n_segs_per_evt * SESSION_CONN_HDR_LEN;
+ if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, n_dequeued))
+ session_dequeue_notify (ctx->s);
+ }
+ return SESSION_TX_OK;
+}
+
+int
+session_tx_fifo_peek_and_snd (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * e, int *n_tx_packets)
+{
+ return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
+}
+
+int
+session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * e, int *n_tx_packets)
+{
+ return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
+}
+
+int
+session_tx_fifo_dequeue_internal (session_worker_t * wrk,
+ vlib_node_runtime_t * node,
+ session_evt_elt_t * elt, int *n_tx_packets)
+{
+ transport_send_params_t *sp = &wrk->ctx.sp;
+ session_t *s = wrk->ctx.s;
+ u32 n_packets;
+
+ if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
+ return 0;
+
+ /* Clear custom-tx flag used to request reschedule for tx */
+ s->flags &= ~SESSION_F_CUSTOM_TX;
+
+ sp->flags = 0;
+ sp->bytes_dequeued = 0;
+ sp->max_burst_size = clib_min (SESSION_NODE_FRAME_SIZE - *n_tx_packets,
+ TRANSPORT_PACER_MAX_BURST_PKTS);
+
+ n_packets = transport_custom_tx (session_get_transport_proto (s), s, sp);
+ *n_tx_packets += n_packets;
+
+ if (s->flags & SESSION_F_CUSTOM_TX)
+ {
+ session_evt_add_old (wrk, elt);
+ }
+ else if (!(sp->flags & TRANSPORT_SND_F_DESCHED))
+ {
+ svm_fifo_unset_event (s->tx_fifo);
+ if (svm_fifo_max_dequeue_cons (s->tx_fifo))
+ if (svm_fifo_set_event (s->tx_fifo))
+ session_evt_add_head_old (wrk, elt);
+ }
+
+ if (sp->bytes_dequeued &&
+ svm_fifo_needs_deq_ntf (s->tx_fifo, sp->bytes_dequeued))
+ session_dequeue_notify (s);
+
+ return n_packets;
+}
+
+always_inline session_t *
+session_event_get_session (session_worker_t * wrk, session_event_t * e)
+{
+ if (PREDICT_FALSE (pool_is_free_index (wrk->sessions, e->session_index)))
+ return 0;
+
+ ASSERT (session_is_valid (e->session_index, wrk->vm->thread_index));
+ return pool_elt_at_index (wrk->sessions, e->session_index);
+}
+
+always_inline void
+session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
+{
+ clib_llist_index_t ei;
+ void (*fp) (void *);
+ session_event_t *e;
+ session_t *s;
+
+ ei = clib_llist_entry_index (wrk->event_elts, elt);
+ e = &elt->evt;
+
+ switch (e->event_type)
+ {
+ case SESSION_CTRL_EVT_RPC:
+ fp = e->rpc_args.fp;
+ (*fp) (e->rpc_args.arg);
+ break;
+ case SESSION_CTRL_EVT_HALF_CLOSE:
+ s = session_get_from_handle_if_valid (e->session_handle);
+ if (PREDICT_FALSE (!s))
+ break;
+ session_transport_half_close (s);
+ break;
+ case SESSION_CTRL_EVT_CLOSE:
+ s = session_get_from_handle_if_valid (e->session_handle);
+ if (PREDICT_FALSE (!s))
+ break;
+ session_transport_close (s);
+ break;
+ case SESSION_CTRL_EVT_RESET:
+ s = session_get_from_handle_if_valid (e->session_handle);
+ if (PREDICT_FALSE (!s))
+ break;
+ session_transport_reset (s);
+ break;
+ case SESSION_CTRL_EVT_LISTEN:
+ session_mq_listen_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_LISTEN_URI:
+ session_mq_listen_uri_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_UNLISTEN:
+ session_mq_unlisten_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_CONNECT:
+ session_mq_connect_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_CONNECT_URI:
+ session_mq_connect_uri_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_SHUTDOWN:
+ session_mq_shutdown_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ case SESSION_CTRL_EVT_DISCONNECT:
+ session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ case SESSION_CTRL_EVT_DISCONNECTED:
+ session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ case SESSION_CTRL_EVT_ACCEPTED_REPLY:
+ session_mq_accepted_reply_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
+ session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
+ elt));
+ break;
+ case SESSION_CTRL_EVT_RESET_REPLY:
+ session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ case SESSION_CTRL_EVT_WORKER_UPDATE:
+ session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ case SESSION_CTRL_EVT_APP_DETACH:
+ app_mq_detach_handler (wrk, elt);
+ break;
+ case SESSION_CTRL_EVT_APP_WRK_RPC:
+ session_mq_app_wrk_rpc_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ case SESSION_CTRL_EVT_TRANSPORT_ATTR:
+ session_mq_transport_attr_handler (session_evt_ctrl_data (wrk, elt));
+ break;
+ default:
+ clib_warning ("unhandled event type %d", e->event_type);
+ }
+
+ /* Regrab elements in case pool moved */
+ elt = clib_llist_elt (wrk->event_elts, ei);
+ if (!clib_llist_elt_is_linked (elt, evt_list))
+ {
+ e = &elt->evt;
+ if (e->event_type >= SESSION_CTRL_EVT_BOUND)
+ session_evt_ctrl_data_free (wrk, elt);
+ clib_llist_put (wrk->event_elts, elt);
+ }
+ SESSION_EVT (SESSION_EVT_COUNTS, CNT_CTRL_EVTS, 1, wrk);
+}
+
+always_inline void
+session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
+ session_evt_elt_t * elt, int *n_tx_packets)
+{
+ session_main_t *smm = &session_main;
+ app_worker_t *app_wrk;
+ clib_llist_index_t ei;
+ session_event_t *e;
+ session_t *s;
+
+ ei = clib_llist_entry_index (wrk->event_elts, elt);
+ e = &elt->evt;
+
+ switch (e->event_type)
+ {
+ case SESSION_IO_EVT_TX_FLUSH:
+ case SESSION_IO_EVT_TX:
+ s = session_event_get_session (wrk, e);
+ if (PREDICT_FALSE (!s))
+ break;
+ CLIB_PREFETCH (s->tx_fifo, sizeof (*(s->tx_fifo)), LOAD);
+ wrk->ctx.s = s;
+ /* Spray packets in per session type frames, since they go to
+ * different nodes */
+ (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
+ break;
+ case SESSION_IO_EVT_RX:
+ s = session_event_get_session (wrk, e);
+ if (!s)
+ break;
+ transport_app_rx_evt (session_get_transport_proto (s),
+ s->connection_index, s->thread_index);
+ break;
+ case SESSION_IO_EVT_BUILTIN_RX:
+ s = session_event_get_session (wrk, e);
+ if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
+ break;
+ svm_fifo_unset_event (s->rx_fifo);
+ app_wrk = app_worker_get (s->app_wrk_index);
+ app_worker_builtin_rx (app_wrk, s);
+ break;
+ case SESSION_IO_EVT_TX_MAIN:
+ s = session_get_if_valid (e->session_index, 0 /* main thread */);
+ if (PREDICT_FALSE (!s))
+ break;
+ wrk->ctx.s = s;
+ if (PREDICT_TRUE (s != 0))
+ (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
+ break;
+ default:
+ clib_warning ("unhandled event type %d", e->event_type);
+ }
+
+ SESSION_EVT (SESSION_EVT_IO_EVT_COUNTS, e->event_type, 1, wrk);
+
+ /* Regrab elements in case pool moved */
+ elt = clib_llist_elt (wrk->event_elts, ei);
+ if (!clib_llist_elt_is_linked (elt, evt_list))
+ clib_llist_put (wrk->event_elts, elt);
+}
+
+/* *INDENT-OFF* */
+static const u32 session_evt_msg_sizes[] = {
+#define _(symc, sym) \
+ [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
+ foreach_session_ctrl_evt
+#undef _
+};
+/* *INDENT-ON* */
+
+always_inline void
+session_update_time_subscribers (session_main_t *smm, clib_time_type_t now,
+ u32 thread_index)
+{
+ session_update_time_fn *fn;
+
+ vec_foreach (fn, smm->update_time_fns)
+ (*fn) (now, thread_index);
+}
+
+always_inline void
+session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
+{
+ session_evt_elt_t *elt;
+
+ if (evt->event_type >= SESSION_CTRL_EVT_RPC)
+ {
+ elt = session_evt_alloc_ctrl (wrk);
+ if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
+ {
+ elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
+ elt->evt.event_type = evt->event_type;
+ clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
+ session_evt_msg_sizes[evt->event_type]);
+ }
+ else
+ {
+ /* Internal control events fit into io events footprint */
+ clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
+ }
+ }
+ else
+ {
+ elt = session_evt_alloc_new (wrk);
+ clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
+ }
+}
+
+static void
+session_flush_pending_tx_buffers (session_worker_t * wrk,
+ vlib_node_runtime_t * node)
+{
+ vlib_buffer_enqueue_to_next_vec (wrk->vm, node, &wrk->pending_tx_buffers,
+ &wrk->pending_tx_nexts,
+ vec_len (wrk->pending_tx_nexts));
+ vec_reset_length (wrk->pending_tx_buffers);
+ vec_reset_length (wrk->pending_tx_nexts);
+}
+
+int
+session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq)
+{
+ svm_msg_q_msg_t _msg, *msg = &_msg;
+ u32 i, n_to_dequeue = 0;
+ session_event_t *evt;
+
+ n_to_dequeue = svm_msg_q_size (mq);
+ for (i = 0; i < n_to_dequeue; i++)
+ {
+ svm_msg_q_sub_raw (mq, msg);
+ evt = svm_msg_q_msg_data (mq, msg);
+ session_evt_add_to_list (wrk, evt);
+ svm_msg_q_free_msg (mq, msg);
+ }
+
+ return n_to_dequeue;
+}
+
+static void
+session_wrk_update_state (session_worker_t *wrk)
+{
+ vlib_main_t *vm = wrk->vm;
+
+ if (wrk->state == SESSION_WRK_POLLING)
+ {
+ if (clib_llist_elts (wrk->event_elts) == 4 &&
+ vlib_last_vectors_per_main_loop (vm) < 1)
+ {
+ session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT);
+ vlib_node_set_state (vm, session_queue_node.index,
+ VLIB_NODE_STATE_INTERRUPT);
+ }
+ }
+ else if (wrk->state == SESSION_WRK_INTERRUPT)
+ {
+ if (clib_llist_elts (wrk->event_elts) > 4 ||
+ vlib_last_vectors_per_main_loop (vm) > 1)
+ {
+ session_wrk_set_state (wrk, SESSION_WRK_POLLING);
+ vlib_node_set_state (vm, session_queue_node.index,
+ VLIB_NODE_STATE_POLLING);
+ }
+ else if (PREDICT_FALSE (!pool_elts (wrk->sessions)))
+ {
+ session_wrk_set_state (wrk, SESSION_WRK_IDLE);
+ }
+ }
+ else
+ {
+ if (clib_llist_elts (wrk->event_elts))
+ {
+ session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT);
+ }
+ }
+}
+
+static uword
+session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
{
+ u32 thread_index = vm->thread_index, __clib_unused n_evts;
+ session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
+ session_main_t *smm = vnet_get_session_main ();
+ session_worker_t *wrk = &smm->wrk[thread_index];
+ clib_llist_index_t ei, next_ei, old_ti;
+ int n_tx_packets;
+
+ SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
+
+ session_wrk_update_time (wrk, vlib_time_now (vm));
+
+ /*
+ * Update transport time
+ */
+ session_update_time_subscribers (smm, wrk->last_vlib_time, thread_index);
+ n_tx_packets = vec_len (wrk->pending_tx_buffers);
+ SESSION_EVT (SESSION_EVT_DSP_CNTRS, UPDATE_TIME, wrk);
+
+ if (PREDICT_FALSE (wrk->dma_enabled))
+ {
+ if (wrk->trans_head == ((wrk->trans_tail + 1) & (wrk->trans_size - 1)))
+ return 0;
+ wrk->batch = vlib_dma_batch_new (vm, wrk->config_index);
+ if (!wrk->batch)
+ return 0;
+ }
+
+ /*
+ * Dequeue new internal mq events
+ */
+
+ n_evts = session_wrk_handle_mq (wrk, wrk->vpp_event_queue);
+ SESSION_EVT (SESSION_EVT_DSP_CNTRS, MQ_DEQ, wrk, n_evts);
+
+ /*
+ * Handle control events
+ */
+
+ ei = wrk->ctrl_head;
+ ctrl_he = clib_llist_elt (wrk->event_elts, ei);
+ next_ei = clib_llist_next_index (ctrl_he, evt_list);
+ old_ti = clib_llist_prev_index (ctrl_he, evt_list);
+ while (ei != old_ti)
+ {
+ ei = next_ei;
+ elt = clib_llist_elt (wrk->event_elts, next_ei);
+ next_ei = clib_llist_next_index (elt, evt_list);
+ clib_llist_remove (wrk->event_elts, evt_list, elt);
+ session_event_dispatch_ctrl (wrk, elt);
+ }
+
+ SESSION_EVT (SESSION_EVT_DSP_CNTRS, CTRL_EVTS, wrk);
+
+ /*
+ * Handle the new io events.
+ */
+
+ new_he = clib_llist_elt (wrk->event_elts, wrk->new_head);
+ old_he = clib_llist_elt (wrk->event_elts, wrk->old_head);
+ old_ti = clib_llist_prev_index (old_he, evt_list);
+
+ ei = clib_llist_next_index (new_he, evt_list);
+ while (ei != wrk->new_head && n_tx_packets < SESSION_NODE_FRAME_SIZE)
+ {
+ elt = clib_llist_elt (wrk->event_elts, ei);
+ ei = clib_llist_next_index (elt, evt_list);
+ clib_llist_remove (wrk->event_elts, evt_list, elt);
+ session_event_dispatch_io (wrk, node, elt, &n_tx_packets);
+ }
+
+ SESSION_EVT (SESSION_EVT_DSP_CNTRS, NEW_IO_EVTS, wrk);
+
+ /*
+ * Handle the old io events, if we had any prior to processing the new ones
+ */
+
+ if (old_ti != wrk->old_head)
+ {
+ old_he = clib_llist_elt (wrk->event_elts, wrk->old_head);
+ ei = clib_llist_next_index (old_he, evt_list);
+
+ while (n_tx_packets < SESSION_NODE_FRAME_SIZE)
+ {
+ elt = clib_llist_elt (wrk->event_elts, ei);
+ next_ei = clib_llist_next_index (elt, evt_list);
+ clib_llist_remove (wrk->event_elts, evt_list, elt);
+
+ session_event_dispatch_io (wrk, node, elt, &n_tx_packets);
+
+ if (ei == old_ti)
+ break;
+
+ ei = next_ei;
+ };
+ }
+
+ if (PREDICT_FALSE (wrk->dma_enabled))
+ {
+ if (wrk->batch_num)
+ {
+ vlib_dma_batch_set_cookie (vm, wrk->batch, wrk->trans_tail);
+ wrk->batch_num = 0;
+ wrk->trans_tail++;
+ if (wrk->trans_tail == wrk->trans_size)
+ wrk->trans_tail = 0;
+ }
+
+ vlib_dma_batch_submit (vm, wrk->batch);
+ }
+
+ SESSION_EVT (SESSION_EVT_DSP_CNTRS, OLD_IO_EVTS, wrk);
+
+ if (vec_len (wrk->pending_tx_buffers))
+ session_flush_pending_tx_buffers (wrk, node);
+
+ vlib_node_increment_counter (vm, session_queue_node.index,
+ SESSION_QUEUE_ERROR_TX, n_tx_packets);
+
+ SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
+
+ if (wrk->flags & SESSION_WRK_F_ADAPTIVE)
+ session_wrk_update_state (wrk);
+
+ return n_tx_packets;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (session_queue_node) = {
.function = session_queue_node_fn,
+ .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
.name = "session-queue",
.format_trace = format_session_queue_trace,
.type = VLIB_NODE_TYPE_INPUT,
- .n_errors = ARRAY_LEN (session_queue_error_strings),
- .error_strings = session_queue_error_strings,
- .n_next_nodes = SESSION_QUEUE_N_NEXT,
+ .n_errors = SESSION_QUEUE_N_ERROR,
+ .error_counters = session_error_counters,
+ .state = VLIB_NODE_STATE_DISABLED,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+session_wrk_tfd_read_ready (clib_file_t *cf)
+{
+ session_worker_t *wrk = session_main_get_worker (cf->private_data);
+ u64 buf;
+ int rv;
+
+ vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
+ rv = read (wrk->timerfd, &buf, sizeof (buf));
+ if (rv < 0 && errno != EAGAIN)
+ clib_unix_warning ("failed");
+ return 0;
+}
+
+static clib_error_t *
+session_wrk_tfd_write_ready (clib_file_t *cf)
+{
+ return 0;
+}
+
+void
+session_wrk_enable_adaptive_mode (session_worker_t *wrk)
+{
+ u32 thread_index = wrk->vm->thread_index;
+ clib_file_t template = { 0 };
+
+ if ((wrk->timerfd = timerfd_create (CLOCK_MONOTONIC, TFD_NONBLOCK)) < 0)
+ clib_warning ("timerfd_create");
+
+ template.read_function = session_wrk_tfd_read_ready;
+ template.write_function = session_wrk_tfd_write_ready;
+ template.file_descriptor = wrk->timerfd;
+ template.private_data = thread_index;
+ template.polling_thread_index = thread_index;
+ template.description = format (0, "session-wrk-tfd-%u", thread_index);
+
+ wrk->timerfd_file = clib_file_add (&file_main, &template);
+ wrk->flags |= SESSION_WRK_F_ADAPTIVE;
+}
+
+static clib_error_t *
+session_queue_exit (vlib_main_t * vm)
+{
+ if (vlib_get_n_threads () < 2)
+ return 0;
+
+ /*
+ * Shut off (especially) worker-thread session nodes.
+ * Otherwise, vpp can crash as the main thread unmaps the
+ * API segment.
+ */
+ vlib_worker_thread_barrier_sync (vm);
+ session_node_enable_disable (0 /* is_enable */ );
+ vlib_worker_thread_barrier_release (vm);
+ return 0;
+}
+
+VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
+
+static uword
+session_queue_run_on_main (vlib_main_t * vm)
+{
+ vlib_node_runtime_t *node;
+
+ node = vlib_node_get_runtime (vm, session_queue_node.index);
+ return session_queue_node_fn (vm, node, 0);
+}
+
+static uword
+session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ uword *event_data = 0;
+ f64 timeout = 1.0;
+ uword event_type;
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ event_type = vlib_process_get_events (vm, (uword **) & event_data);
+
+ switch (event_type)
+ {
+ case SESSION_Q_PROCESS_RUN_ON_MAIN:
+ /* Run session queue node on main thread */
+ session_queue_run_on_main (vm);
+ break;
+ case SESSION_Q_PROCESS_STOP:
+ vlib_node_set_state (vm, session_queue_process_node.index,
+ VLIB_NODE_STATE_DISABLED);
+ timeout = 100000.0;
+ break;
+ case ~0:
+ /* Timed out. Run on main to ensure all events are handled */
+ session_queue_run_on_main (vm);
+ break;
+ }
+ vec_reset_length (event_data);
+ }
+ return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (session_queue_process_node) =
+{
+ .function = session_queue_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "session-queue-process",
+ .state = VLIB_NODE_STATE_DISABLED,
+};
+/* *INDENT-ON* */
+
+static_always_inline uword
+session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ session_main_t *sm = &session_main;
+ if (!sm->wrk[0].vpp_event_queue)
+ return 0;
+ node = vlib_node_get_runtime (vm, session_queue_node.index);
+ return session_queue_node_fn (vm, node, frame);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (session_queue_pre_input_node) =
+{
+ .function = session_queue_pre_input_inline,
+ .type = VLIB_NODE_TYPE_PRE_INPUT,
+ .name = "session-queue-main",
.state = VLIB_NODE_STATE_DISABLED,
- .next_nodes =
- {
- [SESSION_QUEUE_NEXT_DROP] = "error-drop",
- [SESSION_QUEUE_NEXT_IP4_LOOKUP] = "ip4-lookup",
- [SESSION_QUEUE_NEXT_IP6_LOOKUP] = "ip6-lookup",
- [SESSION_QUEUE_NEXT_TCP_IP4_OUTPUT] = "tcp4-output",
- [SESSION_QUEUE_NEXT_TCP_IP6_OUTPUT] = "tcp6-output",
- },
};
/* *INDENT-ON* */
Code Review / vpp.git / blobdiff