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authorAloys Augustin <aloaugus@cisco.com>2019-08-01 15:22:07 +0200
committerAndrew Yourtchenko <ayourtch@gmail.com>2019-09-04 17:42:37 +0000
commitd1d4043df2f37225fb2b3caeca1162eb4550cc1a (patch)
treea315dca9c03edb02e303cb9ad55c6bceb18e1a14
parent3ce1239b8ece822d2d8f9bcbc516f778bdf52cdf (diff)
quic: handle session migration notifications
Rely on the migrate callback to move quic connections to follow the underlying udp connection placement. Change-Id: Ia1cf3a16187bbe48f5afb3d1f444427f288ff79c Type: fix Signed-off-by: Aloys Augustin <aloaugus@cisco.com> (cherry picked from commit 243e1933bbecce0a251a5ff71c12dced9e30823f)
-rw-r--r--src/plugins/quic/quic.c101
1 files changed, 38 insertions, 63 deletions
diff --git a/src/plugins/quic/quic.c b/src/plugins/quic/quic.c
index 51de11729cd..92da8fd7f97 100644
--- a/src/plugins/quic/quic.c
+++ b/src/plugins/quic/quic.c
@@ -141,7 +141,7 @@ quic_get_quicly_ctx_from_ctx (quic_ctx_t * ctx)
}
static quicly_context_t *
-quic_get_quicly_ctx_from_udp (u32 udp_session_handle)
+quic_get_quicly_ctx_from_udp (u64 udp_session_handle)
{
session_t *udp_session;
application_t *app;
@@ -1405,6 +1405,7 @@ quic_receive_connection (void *arg)
quic_ctx_t *temp_ctx, *new_ctx;
clib_bihash_kv_16_8_t kv;
quicly_conn_t *conn;
+ session_t *udp_session;
temp_ctx = arg;
new_ctx_id = quic_ctx_alloc (thread_index);
@@ -1429,7 +1430,12 @@ quic_receive_connection (void *arg)
new_ctx->timer_handle = QUIC_TIMER_HANDLE_INVALID;
quic_update_timer (new_ctx);
- /* Trigger read on this connection ? */
+ /* Trigger write on this connection if necessary */
+ udp_session = session_get_from_handle (new_ctx->udp_session_handle);
+ if (svm_fifo_max_dequeue (udp_session->tx_fifo))
+ if (session_send_io_evt_to_thread (udp_session->tx_fifo,
+ SESSION_IO_EVT_TX))
+ QUIC_DBG (4, "Cannot send TX event");
}
static void
@@ -1460,60 +1466,6 @@ quic_transfer_connection (u32 ctx_index, u32 dest_thread)
(void *) temp_ctx);
}
-static void
-quic_transfer_connection_rpc (void *arg)
-{
- u64 arg_int = (u64) arg;
- u32 ctx_index, dest_thread;
-
- ctx_index = (u32) (arg_int >> 32);
- dest_thread = (u32) (arg_int & UINT32_MAX);
- quic_transfer_connection (ctx_index, dest_thread);
-}
-
-/*
- * This assumes that the connection is not yet associated to a session
- * So currently it only works on the client side when receiving the first packet
- * from the server
- */
-static void
-quic_move_connection_to_thread (u32 ctx_index, u32 owner_thread,
- u32 to_thread,
- quicly_decoded_packet_t * packet)
-{
- clib_bihash_kv_16_8_t kv;
- clib_bihash_16_8_t *h;
-
- if (owner_thread == UINT32_MAX)
- {
- QUIC_DBG (3, "Connection already moving to right thread");
- return;
- }
-
- /* Mark connection as moving in the conn map */
- h = &quic_main.connection_hash;
- quic_make_connection_key (&kv, &packet->cid.dest.plaintext);
- if (clib_bihash_search_16_8 (h, &kv, &kv) != 0)
- {
- QUIC_DBG (0, "Bug: conn to move not found");
- return;
- }
- kv.value |= (u64) UINT32_MAX << 32;
- if (clib_bihash_add_del_16_8
- (&quic_main.connection_hash, &kv, /* is_add */ 1))
- {
- QUIC_DBG (0, "Bug: cannot update conn in lookup hash");
- return;
- }
-
- /* Send rpc to owner thread to move conn */
- QUIC_DBG (2, "Requesting transfer of conn %u from thread %u", ctx_index,
- owner_thread);
- u64 arg = ((u64) ctx_index) << 32 | to_thread;
- session_send_rpc_evt_to_thread (owner_thread, quic_transfer_connection_rpc,
- (void *) arg);
-}
-
static int
quic_session_connected_callback (u32 quic_app_index, u32 ctx_index,
session_t * udp_session, u8 is_fail)
@@ -1578,11 +1530,11 @@ quic_session_connected_callback (u32 quic_app_index, u32 ctx_index,
QUIC_DBG (2, "Registering conn with id %lu %lu", kv.key[0], kv.key[1]);
clib_bihash_add_del_16_8 (&quic_main.connection_hash, &kv, 1 /* is_add */ );
- quic_send_packets (ctx);
-
/* UDP stack quirk? preemptively transfer connection if that happens */
if (udp_session->thread_index != thread_index)
quic_transfer_connection (ctx_index, udp_session->thread_index);
+ else
+ quic_send_packets (ctx);
return ret;
}
@@ -1602,7 +1554,31 @@ quic_session_reset_callback (session_t * s)
static void
quic_session_migrate_callback (session_t * s, session_handle_t new_sh)
{
- QUIC_DBG (2, "Quic session migrate callback");
+ /*
+ * TODO we need better way to get the connection from the session
+ * This will become possible once we stop storing the app id in the UDP
+ * session opaque
+ */
+ u32 thread_index = vlib_get_thread_index ();
+ u64 old_session_handle = session_handle (s);
+ u32 new_thread = session_thread_from_handle (new_sh);
+ quic_ctx_t *ctx;
+
+ QUIC_DBG (1, "Session %x migrated to %lx", s->session_index, new_sh);
+ /* *INDENT-OFF* */
+ pool_foreach (ctx, quic_main.ctx_pool[thread_index],
+ ({
+ if (ctx->udp_session_handle == old_session_handle)
+ {
+ /* Right ctx found, move associated conn */
+ QUIC_DBG (5, "Found right ctx: %x", ctx->c_c_index);
+ ctx->udp_session_handle = new_sh;
+ quic_transfer_connection (ctx->c_c_index, new_thread);
+ return;
+ }
+ }));
+ /* *INDENT-ON* */
+ QUIC_DBG (0, "BUG: Connection to migrate not found");
}
int
@@ -1664,7 +1640,6 @@ quic_del_segment_callback (u32 client_index, u64 seg_handle)
return 0;
}
-
static int
quic_custom_app_rx_callback (transport_connection_t * tc)
{
@@ -2001,9 +1976,9 @@ quic_app_rx_callback (session_t * udp_session)
}
else if (ctx_index != UINT32_MAX)
{
- /* Connection found but on wrong thread, ask move */
- quic_move_connection_to_thread (ctx_index, ctx_thread,
- thread_index, &packet);
+ /* Connection found but on wrong thread, just wait for
+ * session_migrate_callback to be called */
+ return 0;
}
else if ((packet.octets.base[0] & QUICLY_PACKET_TYPE_BITMASK) ==
QUICLY_PACKET_TYPE_INITIAL)