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authorFlorin Coras <fcoras@cisco.com>2023-12-11 16:04:57 -0800
committerDave Barach <vpp@barachs.net>2024-01-09 17:07:54 +0000
commit7428eaa4a1ae55052825cdc6c0a9ae6c4f8748ac (patch)
tree03cd6175294c6b13737e83ccce112b1ca0d6d6e9 /src/vnet/session/application_worker.c
parent5afc13d594bf874092e135a8dc94d30c4537526b (diff)
session: support for cl port reuse
Adds support for connectionless listener port reuse. Until now, cl listeners had fifos allocated to them and therefore only one app worker could ever listen, i.e., a session cannot have multiple fifos. To circumvent the limitation, this separates the fifos from the listener by allocating new cl sessions for each app worker that reuses the app listener. Flows are hashed to app worker cl sessions but, for now, this is not a consistent/fixed hash. Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: Ic6533cd47f2765903669f88c288bd592fb17a19e
Diffstat (limited to 'src/vnet/session/application_worker.c')
-rw-r--r--src/vnet/session/application_worker.c74
1 files changed, 61 insertions, 13 deletions
diff --git a/src/vnet/session/application_worker.c b/src/vnet/session/application_worker.c
index 960d916133f..ea5a4db7fd5 100644
--- a/src/vnet/session/application_worker.c
+++ b/src/vnet/session/application_worker.c
@@ -186,12 +186,67 @@ app_worker_alloc_session_fifos (segment_manager_t * sm, session_t * s)
}
int
+app_worker_alloc_wrk_cl_session (app_worker_t *app_wrk, session_t *ls)
+{
+ svm_fifo_t *rx_fifo = 0, *tx_fifo = 0;
+ segment_manager_t *sm;
+ session_handle_t lsh;
+ app_listener_t *al;
+ session_t *s;
+
+ al = app_listener_get_w_session (ls);
+ sm = app_worker_get_listen_segment_manager (app_wrk, ls);
+ lsh = session_handle (ls);
+
+ s = session_alloc (0 /* listener on main worker */);
+ session_set_state (s, SESSION_STATE_LISTENING);
+ s->flags |= SESSION_F_IS_CLESS;
+ s->app_wrk_index = app_wrk->wrk_index;
+ ls = session_get_from_handle (lsh);
+ s->session_type = ls->session_type;
+ s->connection_index = ls->connection_index;
+
+ segment_manager_alloc_session_fifos (sm, s->thread_index, &rx_fifo,
+ &tx_fifo);
+
+ rx_fifo->shr->master_session_index = s->session_index;
+ rx_fifo->master_thread_index = s->thread_index;
+
+ tx_fifo->shr->master_session_index = s->session_index;
+ tx_fifo->master_thread_index = s->thread_index;
+
+ s->rx_fifo = rx_fifo;
+ s->tx_fifo = tx_fifo;
+
+ vec_validate (al->cl_listeners, app_wrk->wrk_map_index);
+ al->cl_listeners[app_wrk->wrk_map_index] = s->session_index;
+
+ return 0;
+}
+
+void
+app_worker_free_wrk_cl_session (app_worker_t *app_wrk, session_t *ls)
+{
+ app_listener_t *al;
+ session_t *s;
+
+ al = app_listener_get_w_session (ls);
+
+ s = app_listener_get_wrk_cl_session (al, app_wrk->wrk_map_index);
+ segment_manager_dealloc_fifos (s->rx_fifo, s->tx_fifo);
+ session_free (s);
+
+ al->cl_listeners[app_wrk->wrk_map_index] = SESSION_INVALID_INDEX;
+}
+
+int
app_worker_init_listener (app_worker_t * app_wrk, session_t * ls)
{
segment_manager_t *sm;
/* Allocate segment manager. All sessions derived out of a listen session
- * have fifos allocated by the same segment manager. */
+ * have fifos allocated by the same segment manager.
+ * TODO(fcoras): limit memory consumption by cless listeners */
if (!(sm = app_worker_alloc_segment_manager (app_wrk)))
return SESSION_E_ALLOC;
@@ -202,12 +257,9 @@ app_worker_init_listener (app_worker_t * app_wrk, session_t * ls)
hash_set (app_wrk->listeners_table, listen_session_get_handle (ls),
segment_manager_index (sm));
- if (transport_connection_is_cless (session_get_transport (ls)))
- {
- if (ls->rx_fifo)
- return SESSION_E_NOSUPPORT;
- return app_worker_alloc_session_fifos (sm, ls);
- }
+ if (ls->flags & SESSION_F_IS_CLESS)
+ return app_worker_alloc_wrk_cl_session (app_wrk, ls);
+
return 0;
}
@@ -276,12 +328,8 @@ app_worker_stop_listen_session (app_worker_t * app_wrk, session_t * ls)
if (PREDICT_FALSE (!sm_indexp))
return;
- /* Dealloc fifos, if any (dgram listeners) */
- if (ls->rx_fifo)
- {
- segment_manager_dealloc_fifos (ls->rx_fifo, ls->tx_fifo);
- ls->tx_fifo = ls->rx_fifo = 0;
- }
+ if (ls->flags & SESSION_F_IS_CLESS)
+ app_worker_free_wrk_cl_session (app_wrk, ls);
/* Try to cleanup segment manager */
sm = segment_manager_get (*sm_indexp);