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authorFlorin Coras <fcoras@cisco.com>2019-08-06 18:28:49 -0700
committerJohn Lo <loj@cisco.com>2019-08-09 16:58:17 +0000
commita932a34a22991277123163c819cada87553dc478 (patch)
tree81eddb144204f106d20017c4e1860d4b96a39fcc
parentec25b91ad3d4aad0f3791f57eb8c24c487f675ca (diff)
udp: fix rx event generation
When session is owned by another thread, avoid postponing the generation of the rx event. Type:fix Change-Id: Ie6afc8116ce40e83d8aae0432b48e19b31287d8b Signed-off-by: Florin Coras <fcoras@cisco.com> (cherry picked from commit 9cbf6818b37275199b6c0ebef0ef3d8ecaac0a3b)
-rw-r--r--src/vnet/udp/udp_input.c26
1 files changed, 20 insertions, 6 deletions
diff --git a/src/vnet/udp/udp_input.c b/src/vnet/udp/udp_input.c
index ad86f439fd7..e5a82429a27 100644
--- a/src/vnet/udp/udp_input.c
+++ b/src/vnet/udp/udp_input.c
@@ -225,8 +225,8 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
error0 = UDP_ERROR_CREATE_SESSION;
goto trace0;
}
- s0 =
- session_get (child0->c_s_index, child0->c_thread_index);
+ s0 = session_get (child0->c_s_index,
+ child0->c_thread_index);
s0->session_state = SESSION_STATE_READY;
tc0 = &child0->connection;
uc0 = udp_get_connection_from_transport (tc0);
@@ -255,9 +255,22 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
hdr0.is_ip4 = is_ip4;
clib_spinlock_lock (&uc0->rx_lock);
- wrote0 = session_enqueue_dgram_connection (s0, &hdr0, b0,
- TRANSPORT_PROTO_UDP,
- queue_event);
+ /* If session is owned by another thread and rx event needed,
+ * enqueue event now while we still have the peeker lock */
+ if (s0->thread_index != my_thread_index)
+ {
+ wrote0 = session_enqueue_dgram_connection (s0, &hdr0, b0,
+ TRANSPORT_PROTO_UDP,
+ /* queue event */ 0);
+ if (queue_event && !svm_fifo_has_event (s0->rx_fifo))
+ session_enqueue_notify (s0);
+ }
+ else
+ {
+ wrote0 = session_enqueue_dgram_connection (s0, &hdr0, b0,
+ TRANSPORT_PROTO_UDP,
+ queue_event);
+ }
clib_spinlock_unlock (&uc0->rx_lock);
ASSERT (wrote0 > 0);
@@ -287,7 +300,8 @@ udp46_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
- errors = session_main_flush_all_enqueue_events (TRANSPORT_PROTO_UDP);
+ errors = session_main_flush_enqueue_events (TRANSPORT_PROTO_UDP,
+ my_thread_index);
udp_input_inc_counter (vm, is_ip4, UDP_ERROR_EVENT_FIFO_FULL, errors);
return frame->n_vectors;
}