#include <vnet/vnet.h>
#include <vppinfra/elog.h>
#include <vnet/session/transport.h>
+#include <vnet/session/session.h>
#include <vnet/session/application.h>
#include <vnet/session/session_debug.h>
#include <svm/queue.h>
#undef _
};
-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)
+static void
+session_tx_trace_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
+ u32 next_index, u32 * to_next, u16 n_segs,
+ stream_session_t * s, u32 n_trace)
{
- vlib_buffer_t *chain_b0, *prev_b0;
- u32 chain_bi0, to_deq;
- u16 len_to_deq0, n_bytes_read;
- u8 *data0, j;
+ session_queue_trace_t *t;
+ vlib_buffer_t *b;
+ int i;
- b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
- b0->total_length_not_including_first_buffer = 0;
+ for (i = 0; i < clib_min (n_trace, n_segs); i++)
+ {
+ b = vlib_get_buffer (vm, to_next[i - n_segs]);
+ vlib_trace_buffer (vm, node, next_index, b, 1 /* follow_chain */ );
+ t = vlib_add_trace (vm, node, b, sizeof (*t));
+ t->session_index = s->session_index;
+ t->server_thread_index = s->thread_index;
+ }
+ vlib_set_trace_count (vm, node, n_trace - i);
+}
- chain_bi0 = bi0;
- chain_b0 = b0;
+always_inline void
+session_tx_fifo_chain_tail (vlib_main_t * vm, session_tx_context_t * ctx,
+ vlib_buffer_t * b, u16 * n_bufs, u8 peek_data)
+{
+ session_manager_main_t *smm = &session_manager_main;
+ vlib_buffer_t *chain_b, *prev_b;
+ u32 chain_bi0, to_deq, left_from_seg;
+ u16 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->snd_mss - b->current_length,
+ ctx->left_to_snd);
to_deq = left_from_seg;
- for (j = 1; j < n_bufs_per_seg; j++)
+ for (j = 1; j < ctx->n_bufs_per_seg; j++)
{
- prev_b0 = chain_b0;
- len_to_deq0 = clib_min (to_deq, deq_per_buf);
+ prev_b = chain_b;
+ len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
*n_bufs -= 1;
- chain_bi0 = smm->tx_buffers[thread_index][*n_bufs];
- _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
+ chain_bi0 = smm->tx_buffers[ctx->s->thread_index][*n_bufs];
+ _vec_len (smm->tx_buffers[ctx->s->thread_index]) = *n_bufs;
- chain_b0 = vlib_get_buffer (vm, chain_bi0);
- chain_b0->current_data = 0;
- data0 = vlib_buffer_get_current (chain_b0);
+ 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 = svm_fifo_peek (fifo, *tx_offset, len_to_deq0, data0);
- *tx_offset += n_bytes_read;
+ n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo,
+ ctx->tx_offset, len_to_deq, data);
+ ctx->tx_offset += n_bytes_read;
}
else
{
- n_bytes_read = svm_fifo_dequeue_nowait (fifo, len_to_deq0, data0);
+ if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
+ {
+ svm_fifo_t *f = ctx->s->server_tx_fifo;
+ session_dgram_hdr_t *hdr = &ctx->hdr;
+ u16 deq_now;
+ deq_now = clib_min (hdr->data_length - hdr->data_offset,
+ len_to_deq);
+ n_bytes_read = svm_fifo_peek (f, hdr->data_offset, deq_now,
+ data);
+ ASSERT (n_bytes_read > 0);
+
+ hdr->data_offset += n_bytes_read;
+ if (hdr->data_offset == hdr->data_length)
+ svm_fifo_dequeue_drop (f, hdr->data_length);
+ }
+ else
+ n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
+ len_to_deq, data);
}
- 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;
+ 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_b0->next_buffer = chain_bi0;
- prev_b0->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ prev_b->next_buffer = chain_bi0;
+ prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
/* update current buffer */
- chain_b0->next_buffer = 0;
+ chain_b->next_buffer = 0;
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;
+ && b->total_length_not_including_first_buffer == left_from_seg);
+ ctx->left_to_snd -= left_from_seg;
}
always_inline int
-session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
+session_output_try_get_buffers (vlib_main_t * vm,
session_manager_main_t * smm,
- session_fifo_event_t * e0,
- stream_session_t * s0, u32 thread_index,
- int *n_tx_packets, u8 peek_data)
+ u32 thread_index, u16 * n_bufs, u32 wanted)
{
- 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;
- transport_proto_t tp;
- 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;
+ u32 n_alloc;
+ vec_validate_aligned (smm->tx_buffers[thread_index], wanted - 1,
+ CLIB_CACHE_LINE_BYTES);
+ n_alloc = vlib_buffer_alloc (vm, &smm->tx_buffers[thread_index][*n_bufs],
+ wanted - *n_bufs);
+ *n_bufs += n_alloc;
+ _vec_len (smm->tx_buffers[thread_index]) = *n_bufs;
+ return n_alloc;
+}
- next_index = next0 = smm->session_type_to_next[s0->session_type];
+always_inline void
+session_tx_fill_buffer (vlib_main_t * vm, 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;
- tp = session_get_transport_proto (s0);
- transport_vft = transport_protocol_get_vft (tp);
- tc0 = transport_vft->get_connection (s0->connection_index, thread_index);
+ /*
+ * Start with the first buffer in chain
+ */
+ b->error = 0;
+ b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
+ b->current_data = 0;
+ b->total_length_not_including_first_buffer = 0;
- /* 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);
+ data0 = vlib_buffer_make_headroom (b, MAX_HDRS_LEN);
+ len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
- /* Can't make any progress */
- if (snd_space0 == 0 || snd_mss0 == 0)
+ if (peek_data)
{
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
- return 0;
+ n_bytes_read = svm_fifo_peek (ctx->s->server_tx_fifo, ctx->tx_offset,
+ 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->tx_offset += n_bytes_read;
+ }
+ else
+ {
+ if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
+ {
+ session_dgram_hdr_t *hdr = &ctx->hdr;
+ svm_fifo_t *f = ctx->s->server_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 (ctx->s->session_state == SESSION_STATE_LISTENING)
+ {
+ ip_copy (&ctx->tc->rmt_ip, &hdr->rmt_ip, ctx->tc->is_ip4);
+ 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);
+ }
+ }
+ else
+ {
+ n_bytes_read = svm_fifo_dequeue_nowait (ctx->s->server_tx_fifo,
+ len_to_deq, data0);
+ ASSERT (n_bytes_read > 0);
+ }
}
+ b->current_length = n_bytes_read;
+ ctx->left_to_snd -= n_bytes_read;
- /* Allow enqueuing of a new event */
- svm_fifo_unset_event (s0->server_tx_fifo);
+ /*
+ * 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 (vm, ctx, b, n_bufs, peek_data);
+
+ /* *INDENT-OFF* */
+ SESSION_EVT_DBG(SESSION_EVT_DEQ, ctx->s, ({
+ ed->data[0] = FIFO_EVENT_APP_TX;
+ ed->data[1] = ctx->max_dequeue;
+ ed->data[2] = len_to_deq;
+ ed->data[3] = ctx->left_to_snd;
+ }));
+ /* *INDENT-ON* */
+}
- /* Check how much we can pull. */
- max_dequeue0 = svm_fifo_max_dequeue (s0->server_tx_fifo);
+always_inline u8
+session_tx_not_ready (stream_session_t * s, u8 peek_data)
+{
+ if (peek_data)
+ {
+ /* Can retransmit for closed sessions but can't send new data if
+ * session is not ready or closed */
+ if (s->session_state < SESSION_STATE_READY)
+ return 1;
+ if (s->session_state == SESSION_STATE_CLOSED)
+ return 2;
+ }
+ return 0;
+}
+always_inline transport_connection_t *
+session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
+{
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;
+ 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
- max_dequeue0 -= tx_offset;
+ {
+ return ctx->transport_vft->get_connection (ctx->s->connection_index,
+ ctx->s->thread_index);
+ }
}
+}
- /* Nothing to read return */
- if (max_dequeue0 == 0)
- return 0;
+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;
+ ctx->max_dequeue = svm_fifo_max_dequeue (ctx->s->server_tx_fifo);
+ if (peek_data)
+ {
+ /* Offset in rx fifo from where to peek data */
+ ctx->tx_offset = ctx->transport_vft->tx_fifo_offset (ctx->tc);
+ if (PREDICT_FALSE (ctx->tx_offset >= ctx->max_dequeue))
+ {
+ ctx->max_len_to_snd = 0;
+ return;
+ }
+ ctx->max_dequeue -= ctx->tx_offset;
+ }
+ else
+ {
+ if (ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
+ {
+ if (ctx->max_dequeue <= sizeof (ctx->hdr))
+ {
+ ctx->max_len_to_snd = 0;
+ return;
+ }
+ svm_fifo_peek (ctx->s->server_tx_fifo, 0, sizeof (ctx->hdr),
+ (u8 *) & ctx->hdr);
+ ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
+ ctx->max_dequeue = ctx->hdr.data_length - ctx->hdr.data_offset;
+ }
+ }
+ ASSERT (ctx->max_dequeue > 0);
/* Ensure we're not writing more than transport window allows */
- if (max_dequeue0 < snd_space0)
+ if (ctx->max_dequeue < ctx->snd_space)
{
/* 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;
+ ctx->max_len_to_snd =
+ (ctx->max_dequeue > ctx->snd_mss) ?
+ ctx->max_dequeue - ctx->max_dequeue % ctx->snd_mss : ctx->max_dequeue;
/* TODO Nagle ? */
}
else
{
/* Expectation is that snd_space0 is already a multiple of snd_mss */
- max_len_to_snd0 = snd_space0;
+ ctx->max_len_to_snd = ctx->snd_space;
}
- n_bytes_per_buf = vlib_buffer_free_list_buffer_size
- (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ /* Check if we're tx constrained by the node */
+ ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->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->snd_mss;
+ }
+
+ 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;
+ n_bytes_per_seg = MAX_HDRS_LEN + ctx->snd_mss;
+ ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
+ ctx->deq_per_buf = clib_min (ctx->snd_mss, n_bytes_per_buf);
+ ctx->deq_per_first_buf = clib_min (ctx->snd_mss,
+ n_bytes_per_buf - MAX_HDRS_LEN);
+}
- 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);
+always_inline int
+session_tx_fifo_read_and_snd_i (vlib_main_t * vm, vlib_node_runtime_t * node,
+ session_fifo_event_t * e,
+ stream_session_t * s, int *n_tx_packets,
+ u8 peek_data)
+{
+ u32 next_index, next0, next1, *to_next, n_left_to_next;
+ u32 n_trace = vlib_get_trace_count (vm, node), n_bufs_needed = 0;
+ u32 thread_index = s->thread_index, n_left, pbi;
+ session_manager_main_t *smm = &session_manager_main;
+ session_tx_context_t *ctx = &smm->ctx[thread_index];
+ transport_proto_t tp;
+ vlib_buffer_t *pb;
+ u16 n_bufs, rv;
- 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 ((rv = session_tx_not_ready (s, peek_data))))
{
- /* 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)));
+ if (rv < 2)
+ vec_add1 (smm->pending_event_vector[thread_index], *e);
+ return 0;
+ }
- n_bufs += buffers_allocated;
- _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
+ next_index = smm->session_type_to_next[s->session_type];
+ next0 = next1 = next_index;
- 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);
- }
+ tp = session_get_transport_proto (s);
+ ctx->s = s;
+ ctx->transport_vft = transport_protocol_get_vft (tp);
+ ctx->tc = session_tx_get_transport (ctx, peek_data);
+ ctx->snd_mss = ctx->transport_vft->send_mss (ctx->tc);
+ ctx->snd_space = ctx->transport_vft->send_space (ctx->tc);
+ if (ctx->snd_space == 0 || ctx->snd_mss == 0)
+ {
+ vec_add1 (smm->pending_event_vector[thread_index], *e);
+ return 0;
+ }
+
+ /* Allow enqueuing of a new event */
+ svm_fifo_unset_event (s->server_tx_fifo);
+
+ /* Check how much we can pull. */
+ session_tx_set_dequeue_params (vm, ctx, VLIB_FRAME_SIZE - *n_tx_packets,
+ peek_data);
+
+ if (PREDICT_FALSE (!ctx->max_len_to_snd))
+ return 0;
+
+ n_bufs = vec_len (smm->tx_buffers[thread_index]);
+ n_bufs_needed = ctx->n_segs_per_evt * ctx->n_bufs_per_seg;
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
- while (left_to_snd0 && n_left_to_next)
+ /*
+ * Make sure we have at least one full frame of buffers ready
+ */
+ if (n_bufs < n_bufs_needed)
+ {
+ session_output_try_get_buffers (vm, smm, thread_index, &n_bufs,
+ ctx->n_bufs_per_seg * VLIB_FRAME_SIZE);
+ if (PREDICT_FALSE (n_bufs < n_bufs_needed))
{
- /*
- * 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;
- }
+ vec_add1 (smm->pending_event_vector[thread_index], *e);
+ return -1;
+ }
+ }
- b0->current_length = n_bytes_read;
+ /*
+ * Write until we fill up a frame
+ */
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ if (PREDICT_FALSE (ctx->n_segs_per_evt > n_left_to_next))
+ {
+ ctx->n_segs_per_evt = n_left_to_next;
+ ctx->max_len_to_snd = ctx->snd_mss * n_left_to_next;
+ }
+ ctx->left_to_snd = ctx->max_len_to_snd;
+ n_left = ctx->n_segs_per_evt;
- left_to_snd0 -= n_bytes_read;
- *n_tx_packets = *n_tx_packets + 1;
+ while (n_left >= 4)
+ {
+ vlib_buffer_t *b0, *b1;
+ u32 bi0, bi1;
- /*
- * 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);
- }
+ pbi = smm->tx_buffers[thread_index][n_bufs - 3];
+ pb = vlib_get_buffer (vm, pbi);
+ vlib_prefetch_buffer_header (pb, STORE);
+ pbi = smm->tx_buffers[thread_index][n_bufs - 4];
+ pb = vlib_get_buffer (vm, pbi);
+ vlib_prefetch_buffer_header (pb, STORE);
- /* Ask transport to push header after current_length and
- * total_length_not_including_first_buffer are updated */
- transport_vft->push_header (tc0, b0);
+ to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
+ to_next[1] = bi1 = smm->tx_buffers[thread_index][--n_bufs];
- /* *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* */
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
+ session_tx_fill_buffer (vm, ctx, b1, &n_bufs, peek_data);
- 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;
- }
+ ctx->transport_vft->push_header (ctx->tc, b0);
+ ctx->transport_vft->push_header (ctx->tc, b1);
- 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);
- }
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left -= 2;
- /* If we couldn't dequeue all bytes mark as partially read */
- if (max_len_to_snd0 < max_dequeue0)
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, next0,
+ next1);
+ }
+ while (n_left)
{
- /* 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);
- }
+ vlib_buffer_t *b0;
+ u32 bi0;
+
+ ASSERT (n_bufs >= 1);
+ to_next[0] = bi0 = smm->tx_buffers[thread_index][--n_bufs];
+ b0 = vlib_get_buffer (vm, bi0);
+ session_tx_fill_buffer (vm, ctx, b0, &n_bufs, peek_data);
+
+ /* Ask transport to push header after current_length and
+ * total_length_not_including_first_buffer are updated */
+ ctx->transport_vft->push_header (ctx->tc, b0);
+
+ to_next += 1;
+ n_left_to_next -= 1;
+ n_left -= 1;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, next0);
}
- 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");
+ if (PREDICT_FALSE (n_trace > 0))
+ session_tx_trace_frame (vm, node, next_index, to_next,
+ ctx->n_segs_per_evt, s, n_trace);
- if (svm_fifo_set_event (s0->server_tx_fifo))
+ _vec_len (smm->tx_buffers[thread_index]) = n_bufs;
+ *n_tx_packets += ctx->n_segs_per_evt;
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+
+ /* If we couldn't dequeue all bytes mark as partially read */
+ ASSERT (ctx->left_to_snd == 0);
+ if (ctx->max_len_to_snd < ctx->max_dequeue)
+ if (svm_fifo_set_event (s->server_tx_fifo))
+ vec_add1 (smm->pending_event_vector[thread_index], *e);
+
+ if (!peek_data && ctx->transport_vft->tx_type == TRANSPORT_TX_DGRAM)
{
- vec_add1 (smm->pending_event_vector[thread_index], *e0);
+ /* Fix dgram pre header */
+ if (ctx->max_len_to_snd < ctx->max_dequeue)
+ svm_fifo_overwrite_head (s->server_tx_fifo, (u8 *) & ctx->hdr,
+ sizeof (session_dgram_pre_hdr_t));
+ /* More data needs to be read */
+ else if (svm_fifo_max_dequeue (s->server_tx_fifo) > 0)
+ if (svm_fifo_set_event (s->server_tx_fifo))
+ vec_add1 (smm->pending_event_vector[thread_index], *e);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next + 1);
- _vec_len (smm->tx_buffers[thread_index]) += 1;
-
return 0;
}
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)
+ stream_session_t * s0, int *n_tx_pkts)
{
- return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
- n_tx_pkts, 1);
+ return session_tx_fifo_read_and_snd_i (vm, node, e0, s0, n_tx_pkts, 1);
}
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)
+ stream_session_t * s0, int *n_tx_pkts)
{
- return session_tx_fifo_read_and_snd_i (vm, node, smm, e0, s0, thread_index,
- n_tx_pkts, 0);
+ return session_tx_fifo_read_and_snd_i (vm, node, e0, s0, n_tx_pkts, 0);
+}
+
+int
+session_tx_fifo_dequeue_internal (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ session_fifo_event_t * e0,
+ stream_session_t * s0, int *n_tx_pkts)
+{
+ application_t *app;
+ app = application_get (s0->opaque);
+ svm_fifo_unset_event (s0->server_tx_fifo);
+ return app->cb_fns.builtin_app_tx_callback (s0);
}
always_inline stream_session_t *
clib_memcpy (e, headp, q->elsize);
found = session_node_cmp_event (e, f);
if (found)
- break;
+ return 1;
if (++index == q->maxsize)
index = 0;
}
vlib_frame_t * frame)
{
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_pending_event_vector, *e;
session_fifo_event_t *my_fifo_events;
u32 n_to_dequeue, n_events;
svm_queue_t *q;
application_t *app;
int n_tx_packets = 0;
- u32 my_thread_index = vm->thread_index;
+ u32 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);
+ SESSION_EVT_DBG (SESSION_EVT_POLL_GAP_TRACK, smm, thread_index);
/*
* Update transport time
*/
- transport_update_time (now, my_thread_index);
+ transport_update_time (now, thread_index);
/*
* Get vpp queue events
*/
- q = smm->vpp_event_queues[my_thread_index];
+ q = smm->vpp_event_queues[thread_index];
if (PREDICT_FALSE (q == 0))
return 0;
- my_fifo_events = smm->free_event_vector[my_thread_index];
+ my_fifo_events = smm->free_event_vector[thread_index];
/* 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];
+ my_pending_event_vector = smm->pending_event_vector[thread_index];
if (!n_to_dequeue && !vec_len (my_pending_event_vector)
- && !vec_len (pending_disconnects))
+ && !vec_len (smm->pending_disconnects[thread_index]))
return 0;
SESSION_EVT_DBG (SESSION_EVT_DEQ_NODE, 0);
pthread_mutex_unlock (&q->mutex);
vec_append (my_fifo_events, my_pending_event_vector);
- vec_append (my_fifo_events, smm->pending_disconnects[my_thread_index]);
+ vec_append (my_fifo_events, smm->pending_disconnects[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;
+ smm->pending_event_vector[thread_index] = my_pending_event_vector;
+ _vec_len (smm->pending_disconnects[thread_index]) = 0;
skip_dequeue:
n_events = vec_len (my_fifo_events);
session_fifo_event_t *e0;
e0 = &my_fifo_events[i];
-
switch (e0->event_type)
{
case FIFO_EVENT_APP_TX:
- s0 = session_event_get_session (e0, my_thread_index);
+ if (n_tx_packets == VLIB_FRAME_SIZE)
+ {
+ vec_add1 (smm->pending_event_vector[thread_index], *e0);
+ break;
+ }
+ s0 = session_event_get_session (e0, 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))
- {
- vec_add1 (smm->pending_event_vector[my_thread_index], *e0);
- 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,
+ rv = (smm->session_tx_fns[s0->session_type]) (vm, node, e0, s0,
&n_tx_packets);
/* Out of buffers */
if (PREDICT_FALSE (rv < 0))
}
break;
case FIFO_EVENT_DISCONNECT:
- /* Make sure disconnects run after the pending list is drained */
+ /* Make sure stream disconnects run after the pending list is
+ * drained */
+ s0 = session_get_from_handle (e0->session_handle);
if (!e0->postponed)
{
e0->postponed = 1;
- vec_add1 (smm->pending_disconnects[my_thread_index], *e0);
+ vec_add1 (smm->pending_disconnects[thread_index], *e0);
continue;
}
- s0 = session_get_from_handle (e0->session_handle);
- stream_session_disconnect (s0);
+ /* If tx queue is still not empty, wait */
+ if (svm_fifo_max_dequeue (s0->server_tx_fifo))
+ {
+ vec_add1 (smm->pending_disconnects[thread_index], *e0);
+ continue;
+ }
+
+ stream_session_disconnect_transport (s0);
break;
case FIFO_EVENT_BUILTIN_RX:
- s0 = session_event_get_session (e0, my_thread_index);
+ s0 = session_event_get_session (e0, 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);
+ app->cb_fns.builtin_app_rx_callback (s0);
break;
case FIFO_EVENT_RPC:
fp = e0->rpc_args.fp;
}
_vec_len (my_fifo_events) = 0;
- smm->free_event_vector[my_thread_index] = my_fifo_events;
+ smm->free_event_vector[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);
+ SESSION_EVT_DBG (SESSION_EVT_DISPATCH_END, smm, thread_index);
return n_tx_packets;
}
VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
+static uword
+session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
+ vlib_frame_t * f)
+{
+ f64 now, timeout = 1.0;
+ uword *event_data = 0;
+ uword event_type;
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, timeout);
+ now = vlib_time_now (vm);
+ event_type = vlib_process_get_events (vm, (uword **) & event_data);
+
+ switch (event_type)
+ {
+ case SESSION_Q_PROCESS_FLUSH_FRAMES:
+ /* Flush the frames by updating all transports times */
+ transport_update_time (now, 0);
+ break;
+ case SESSION_Q_PROCESS_STOP:
+ timeout = 100000.0;
+ break;
+ case ~0:
+ /* Timed out. Update time for all transports to trigger all
+ * outstanding retransmits. */
+ transport_update_time (now, 0);
+ 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* */
+
+
/*
* fd.io coding-style-patch-verification: ON
*