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authorFlorin Coras <fcoras@cisco.com>2021-04-22 18:53:30 -0700
committerFlorin Coras <fcoras@cisco.com>2021-05-04 13:12:43 -0700
commit974b468b4e0c317c72c83a7caf59629086e81fbc (patch)
treee4b60ad346d3fe451537c6a75b7fcc9a05d1107c /src
parenta02ad34f8b21828f70508b22de45221b573825c2 (diff)
tcp: cleanup established and bulk buffer translation
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ic37f640b7f0d0a041c003e76c8f29c21b5e664b3
Diffstat (limited to 'src')
-rw-r--r--src/vnet/tcp/tcp_input.c57
1 files changed, 28 insertions, 29 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 5ec4099fa46..dc521ce1c68 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -1477,71 +1477,70 @@ tcp46_established_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
{
u32 thread_index = vm->thread_index, errors = 0;
tcp_worker_ctx_t *wrk = tcp_get_worker (thread_index);
- u32 n_left_from, *from, *first_buffer;
+ vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
u16 err_counters[TCP_N_ERROR] = { 0 };
+ u32 n_left_from, *from;
if (node->flags & VLIB_NODE_FLAG_TRACE)
tcp_established_trace_frame (vm, node, frame, is_ip4);
- first_buffer = from = vlib_frame_vector_args (frame);
+ from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
+ vlib_get_buffers (vm, from, bufs, n_left_from);
+ b = bufs;
+
while (n_left_from > 0)
{
- u32 bi0, error0 = TCP_ERROR_ACK_OK;
- vlib_buffer_t *b0;
- tcp_header_t *th0;
- tcp_connection_t *tc0;
+ u32 error = TCP_ERROR_ACK_OK;
+ tcp_connection_t *tc;
+ tcp_header_t *th;
if (n_left_from > 1)
{
- vlib_buffer_t *pb;
- pb = vlib_get_buffer (vm, from[1]);
- vlib_prefetch_buffer_header (pb, LOAD);
- CLIB_PREFETCH (pb->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
+ vlib_prefetch_buffer_header (b[1], LOAD);
+ CLIB_PREFETCH (b[1]->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
}
- bi0 = from[0];
- from += 1;
- n_left_from -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- tc0 = tcp_connection_get (vnet_buffer (b0)->tcp.connection_index,
- thread_index);
+ tc = tcp_connection_get (vnet_buffer (b[0])->tcp.connection_index,
+ thread_index);
- if (PREDICT_FALSE (tc0 == 0))
+ if (PREDICT_FALSE (tc == 0))
{
- error0 = TCP_ERROR_INVALID_CONNECTION;
+ error = TCP_ERROR_INVALID_CONNECTION;
goto done;
}
- th0 = tcp_buffer_hdr (b0);
+ th = tcp_buffer_hdr (b[0]);
/* TODO header prediction fast path */
/* 1-4: check SEQ, RST, SYN */
- if (PREDICT_FALSE (tcp_segment_validate (wrk, tc0, b0, th0, &error0)))
+ if (PREDICT_FALSE (tcp_segment_validate (wrk, tc, b[0], th, &error)))
{
- TCP_EVT (TCP_EVT_SEG_INVALID, tc0, vnet_buffer (b0)->tcp);
+ TCP_EVT (TCP_EVT_SEG_INVALID, tc, vnet_buffer (b[0])->tcp);
goto done;
}
/* 5: check the ACK field */
- if (PREDICT_FALSE (tcp_rcv_ack (wrk, tc0, b0, th0, &error0)))
+ if (PREDICT_FALSE (tcp_rcv_ack (wrk, tc, b[0], th, &error)))
goto done;
/* 6: check the URG bit TODO */
/* 7: process the segment text */
- if (vnet_buffer (b0)->tcp.data_len)
- error0 = tcp_segment_rcv (wrk, tc0, b0);
+ if (vnet_buffer (b[0])->tcp.data_len)
+ error = tcp_segment_rcv (wrk, tc, b[0]);
/* 8: check the FIN bit */
- if (PREDICT_FALSE (tcp_is_fin (th0)))
- tcp_rcv_fin (wrk, tc0, b0, &error0);
+ if (PREDICT_FALSE (tcp_is_fin (th)))
+ tcp_rcv_fin (wrk, tc, b[0], &error);
done:
- tcp_inc_err_counter (err_counters, error0, 1);
+ tcp_inc_err_counter (err_counters, error, 1);
+
+ n_left_from -= 1;
+ b += 1;
}
errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_TCP,
@@ -1550,7 +1549,7 @@ tcp46_established_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
tcp_store_err_counters (established, err_counters);
tcp_handle_postponed_dequeues (wrk);
tcp_handle_disconnects (wrk);
- vlib_buffer_free (vm, first_buffer, frame->n_vectors);
+ vlib_buffer_free (vm, from, frame->n_vectors);
return frame->n_vectors;
}