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authorFlorin Coras <fcoras@cisco.com>2018-08-02 10:45:44 -0700
committerDave Barach <openvpp@barachs.net>2018-08-10 20:26:24 +0000
commit993683150202254c6ba8dd43e087a7229edd5d4c (patch)
tree141ce2cdfe546bfe2ad46e66ac9569a33a895072 /src/vnet/session/application.c
parentf46663c65b0238311af93fcfa3030eefdb56e299 (diff)
vcl: support for eventfd mq signaling
- support eventfd based mq signaling. Based on configuration, vcl epoll/select can use either condvars or epoll on mq eventfds. - add vcl support for memfd segments - vpp explicitly registers cut-through segments with apps/vcl - if using eventfd, make ldp allow one call to libc_epoll_create. Needed for the message queue epfd - update svm_queue_t to allow blocking calls with eventfd signaling. Change-Id: I064151ac370bbe29bb16c968bf4e3659c8286bea Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vnet/session/application.c')
-rw-r--r--src/vnet/session/application.c39
1 files changed, 35 insertions, 4 deletions
diff --git a/src/vnet/session/application.c b/src/vnet/session/application.c
index 757e12e1b58..3e127df3bd2 100644
--- a/src/vnet/session/application.c
+++ b/src/vnet/session/application.c
@@ -312,6 +312,12 @@ application_init (application_t * app, u32 api_client_index, u8 * app_name,
}
else
{
+ if (options[APP_OPTIONS_FLAGS] & APP_OPTIONS_FLAGS_EVT_MQ_USE_EVENTFD)
+ {
+ clib_warning ("mq eventfds can only be used if socket transport is "
+ "used for api");
+ return VNET_API_ERROR_APP_UNSUPPORTED_CFG;
+ }
seg_type = SSVM_SEGMENT_PRIVATE;
}
@@ -336,6 +342,8 @@ application_init (application_t * app, u32 api_client_index, u8 * app_name,
props->tx_fifo_size = options[APP_OPTIONS_TX_FIFO_SIZE];
if (options[APP_OPTIONS_EVT_QUEUE_SIZE])
props->evt_q_size = options[APP_OPTIONS_EVT_QUEUE_SIZE];
+ if (options[APP_OPTIONS_FLAGS] & APP_OPTIONS_FLAGS_EVT_MQ_USE_EVENTFD)
+ props->use_mq_eventfd = 1;
if (options[APP_OPTIONS_TLS_ENGINE])
app->tls_engine = options[APP_OPTIONS_TLS_ENGINE];
props->segment_type = seg_type;
@@ -970,6 +978,8 @@ application_free_local_session (application_t * app, local_session_t * s)
local_session_t *
application_get_local_session (application_t * app, u32 session_index)
{
+ if (pool_is_free_index (app->local_sessions, session_index))
+ return 0;
return pool_elt_at_index (app->local_sessions, session_index);
}
@@ -1078,6 +1088,23 @@ application_stop_local_listen (application_t * server, session_handle_t lh)
return 0;
}
+static void
+application_local_session_fix_eventds (svm_msg_q_t * sq, svm_msg_q_t * cq)
+{
+ int fd;
+
+ /*
+ * segment manager initializes only the producer eventds, since vpp is
+ * typically the producer. But for local sessions, we also pass to the
+ * apps the mqs they listen on for events from peer apps, so they are also
+ * consumer fds.
+ */
+ fd = svm_msg_q_get_producer_eventfd (sq);
+ svm_msg_q_set_consumer_eventfd (sq, fd);
+ fd = svm_msg_q_get_producer_eventfd (cq);
+ svm_msg_q_set_consumer_eventfd (cq, fd);
+}
+
int
application_local_session_connect (u32 table_index, application_t * client,
application_t * server,
@@ -1125,8 +1152,12 @@ application_local_session_connect (u32 table_index, application_t * client,
return seg_index;
}
seg = segment_manager_get_segment_w_lock (sm, seg_index);
- sq = segment_manager_alloc_queue (seg, props->evt_q_size);
- cq = segment_manager_alloc_queue (seg, cprops->evt_q_size);
+ sq = segment_manager_alloc_queue (seg, props);
+ cq = segment_manager_alloc_queue (seg, cprops);
+
+ if (props->use_mq_eventfd)
+ application_local_session_fix_eventds (sq, cq);
+
ls->server_evt_q = pointer_to_uword (sq);
ls->client_evt_q = pointer_to_uword (cq);
rv = segment_manager_try_alloc_fifos (seg, props->rx_fifo_size,
@@ -1273,7 +1304,7 @@ application_local_session_disconnect (u32 app_index, local_session_t * ls)
if (app_index == ls->client_index)
{
- send_local_session_disconnect_callback (ls->app_index, ls);
+ mq_send_local_session_disconnected_cb (ls->app_index, ls);
}
else
{
@@ -1292,7 +1323,7 @@ application_local_session_disconnect (u32 app_index, local_session_t * ls)
}
else
{
- send_local_session_disconnect_callback (client->index, ls);
+ mq_send_local_session_disconnected_cb (client->index, ls);
}
}