session: use session index instead of fifo for evt
Avoids derefrencing fifo pointers whose segments could have been
unmapped.
Change-Id: Ifb0b7399e424f145f3f94b769391a6f4e31bb4e6
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/tests/vnet/session/tcp_echo.c b/src/tests/vnet/session/tcp_echo.c
index 435a414..3531a53 100644
--- a/src/tests/vnet/session/tcp_echo.c
+++ b/src/tests/vnet/session/tcp_echo.c
@@ -532,15 +532,6 @@
while (n_to_read > 0);
}
-void
-client_handle_rx (echo_main_t * em, session_event_t * e, u8 * rx_buf)
-{
- echo_session_t *s;
-
- s = pool_elt_at_index (em->sessions, e->fifo->client_session_index);
- recv_data_chunk (em, s, rx_buf);
-}
-
static void
send_data_chunk (echo_main_t * em, echo_session_t * s)
{
@@ -596,42 +587,6 @@
pthread_exit (0);
}
-/*
- * Rx thread that handles all connections.
- *
- * Not used.
- */
-void *
-client_rx_thread_fn (void *arg)
-{
- session_event_t _e, *e = &_e;
- echo_main_t *em = &echo_main;
- static u8 *rx_buf = 0;
- svm_msg_q_msg_t msg;
-
- vec_validate (rx_buf, 1 << 20);
-
- while (!em->time_to_stop && em->state != STATE_READY)
- ;
-
- while (!em->time_to_stop)
- {
- svm_msg_q_sub (em->our_event_queue, &msg, SVM_Q_WAIT, 0);
- e = svm_msg_q_msg_data (em->our_event_queue, &msg);
- switch (e->event_type)
- {
- case FIFO_EVENT_APP_RX:
- client_handle_rx (em, e, rx_buf);
- break;
- default:
- clib_warning ("unknown event type %d", e->event_type);
- break;
- }
- svm_msg_q_free_msg (em->our_event_queue, &msg);
- }
- pthread_exit (0);
-}
-
void
client_send_connect (echo_main_t * em)
{
@@ -1101,7 +1056,7 @@
u32 offset, to_dequeue;
echo_session_t *s;
- s = pool_elt_at_index (em->sessions, e->fifo->client_session_index);
+ s = pool_elt_at_index (em->sessions, e->session_index);
/* Clear event only once. Otherwise, if we do it in the loop by calling
* app_recv_stream, we may end up with a lot of unhandled rx events on the
@@ -1161,7 +1116,7 @@
e = svm_msg_q_msg_data (em->our_event_queue, &msg);
switch (e->event_type)
{
- case FIFO_EVENT_APP_RX:
+ case SESSION_IO_EVT_RX:
server_handle_rx (em, e);
break;
default:
diff --git a/src/tests/vnet/session/udp_echo.c b/src/tests/vnet/session/udp_echo.c
index 9fda73d..4fd6c86 100644
--- a/src/tests/vnet/session/udp_echo.c
+++ b/src/tests/vnet/session/udp_echo.c
@@ -1014,7 +1014,8 @@
/* If event wasn't set, add one */
if (svm_fifo_set_event (tx_fifo))
- app_send_io_evt_to_vpp (session->vpp_evt_q, tx_fifo,
+ app_send_io_evt_to_vpp (session->vpp_evt_q,
+ tx_fifo->master_session_index,
SESSION_IO_EVT_TX, SVM_Q_WAIT);
}
}
@@ -1043,7 +1044,7 @@
switch (e->event_type)
{
case SESSION_IO_EVT_RX:
- server_handle_fifo_event_rx (utm, e->fifo->client_session_index);
+ server_handle_fifo_event_rx (utm, e->session_index);
break;
default:
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 3abde98..fa37a1d 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -649,7 +649,7 @@
{
case SESSION_IO_EVT_RX:
case SESSION_IO_EVT_TX:
- session = vcl_session_get (wrk, e->fifo->client_session_index);
+ session = vcl_session_get (wrk, e->session_index);
if (!session || !(session->session_state & STATE_OPEN))
break;
vec_add1 (wrk->unhandled_evts_vector, *e);
@@ -1491,8 +1491,7 @@
static u8
vcl_is_rx_evt_for_session (session_event_t * e, u32 sid, u8 is_ct)
{
- return (e->event_type == SESSION_IO_EVT_RX
- && e->fifo->client_session_index == sid);
+ return (e->event_type == SESSION_IO_EVT_RX && e->session_index == sid);
}
static inline int
@@ -1529,20 +1528,19 @@
rx_fifo = is_ct ? s->ct_rx_fifo : s->rx_fifo;
s->has_rx_evt = 0;
- if (is_ct)
- svm_fifo_unset_event (s->rx_fifo);
-
if (svm_fifo_is_empty (rx_fifo))
{
- svm_fifo_unset_event (rx_fifo);
if (is_nonblocking)
- return VPPCOM_EWOULDBLOCK;
+ {
+ svm_fifo_unset_event (s->rx_fifo);
+ return VPPCOM_EWOULDBLOCK;
+ }
while (svm_fifo_is_empty (rx_fifo))
{
if (vcl_session_is_closing (s))
return vcl_session_closing_error (s);
- svm_fifo_unset_event (rx_fifo);
+ svm_fifo_unset_event (s->rx_fifo);
svm_msg_q_lock (mq);
if (svm_msg_q_is_empty (mq))
svm_msg_q_wait (mq);
@@ -1551,10 +1549,7 @@
e = svm_msg_q_msg_data (mq, &msg);
svm_msg_q_unlock (mq);
if (!vcl_is_rx_evt_for_session (e, s->session_index, is_ct))
- {
- clib_warning ("THIS ONE type %u", e->event_type);
- vcl_handle_mq_event (wrk, e);
- }
+ vcl_handle_mq_event (wrk, e);
svm_msg_q_free_msg (mq, &msg);
}
}
@@ -1565,7 +1560,7 @@
n_read = app_recv_stream_raw (rx_fifo, buf, n, 0, peek);
if (svm_fifo_is_empty (rx_fifo))
- svm_fifo_unset_event (rx_fifo);
+ svm_fifo_unset_event (s->rx_fifo);
VDBG (2, "vpp handle 0x%llx, sid %u: read %d bytes from (%p)",
s->vpp_handle, session_handle, n_read, rx_fifo);
@@ -1676,8 +1671,7 @@
static u8
vcl_is_tx_evt_for_session (session_event_t * e, u32 sid, u8 is_ct)
{
- return (e->event_type == SESSION_IO_EVT_TX
- && e->fifo->client_session_index == sid);
+ return (e->event_type == SESSION_IO_EVT_TX && e->session_index == sid);
}
static inline int
@@ -1758,7 +1752,8 @@
!is_ct /* do_evt */ , SVM_Q_WAIT);
if (is_ct && svm_fifo_set_event (s->tx_fifo))
- app_send_io_evt_to_vpp (s->vpp_evt_q, s->tx_fifo, et, SVM_Q_WAIT);
+ app_send_io_evt_to_vpp (s->vpp_evt_q, s->tx_fifo->master_session_index,
+ et, SVM_Q_WAIT);
ASSERT (n_write > 0);
@@ -1782,13 +1777,22 @@
1 /* is_flush */ );
}
-#define vcl_fifo_rx_evt_valid_or_break(_fifo) \
-if (PREDICT_FALSE (svm_fifo_is_empty (_fifo))) \
- { \
- svm_fifo_unset_event (_fifo); \
- if (svm_fifo_is_empty (_fifo)) \
- break; \
- } \
+#define vcl_fifo_rx_evt_valid_or_break(_s) \
+if (PREDICT_FALSE (svm_fifo_is_empty (_s->rx_fifo))) \
+ { \
+ if (!vcl_session_is_ct (_s)) \
+ { \
+ svm_fifo_unset_event (_s->rx_fifo); \
+ if (svm_fifo_is_empty (_s->rx_fifo)) \
+ break; \
+ } \
+ else if (svm_fifo_is_empty (_s->ct_rx_fifo)) \
+ { \
+ svm_fifo_unset_event (_s->ct_rx_fifo); \
+ if (svm_fifo_is_empty (_s->ct_rx_fifo)) \
+ break; \
+ } \
+ } \
static void
vcl_select_handle_mq_event (vcl_worker_t * wrk, session_event_t * e,
@@ -1803,10 +1807,10 @@
switch (e->event_type)
{
- case FIFO_EVENT_APP_RX:
- vcl_fifo_rx_evt_valid_or_break (e->fifo);
- sid = e->fifo->client_session_index;
+ case SESSION_IO_EVT_RX:
+ sid = e->session_index;
session = vcl_session_get (wrk, sid);
+ vcl_fifo_rx_evt_valid_or_break (session);
if (!session)
break;
if (sid < n_bits && read_map)
@@ -1816,7 +1820,7 @@
}
break;
case FIFO_EVENT_APP_TX:
- sid = e->fifo->client_session_index;
+ sid = e->session_index;
session = vcl_session_get (wrk, sid);
if (!session)
break;
@@ -1937,8 +1941,10 @@
u32 * bits_set)
{
time_to_wait = (time_to_wait == -1) ? 1e6 : time_to_wait;
- return vcl_select_handle_mq (wrk, wrk->app_event_queue, n_bits, read_map,
- write_map, except_map, time_to_wait, bits_set);
+ vcl_select_handle_mq (wrk, wrk->app_event_queue, n_bits, read_map,
+ write_map, except_map, (bits_set ? 0 : time_to_wait),
+ bits_set);
+ return *bits_set;
}
static int
@@ -2069,7 +2075,7 @@
vppcom_epoll_t *vep;
u32 sid = vep_idx;
- if (VPPCOM_DEBUG <= 1)
+ if (VPPCOM_DEBUG <= 2)
return;
/* Assumes caller has acquired spinlock: vcm->sessions_lockp */
@@ -2354,11 +2360,10 @@
switch (e->event_type)
{
case SESSION_IO_EVT_RX:
- ASSERT (e->fifo->client_thread_index == vcl_get_worker_index ());
- vcl_fifo_rx_evt_valid_or_break (e->fifo);
- sid = e->fifo->client_session_index;
+ sid = e->session_index;
if (!(session = vcl_session_get (wrk, sid)))
break;
+ vcl_fifo_rx_evt_valid_or_break (session);
session_events = session->vep.ev.events;
if (!(EPOLLIN & session->vep.ev.events) || session->has_rx_evt)
break;
@@ -2368,7 +2373,7 @@
session->has_rx_evt = 1;
break;
case SESSION_IO_EVT_TX:
- sid = e->fifo->client_session_index;
+ sid = e->session_index;
if (!(session = vcl_session_get (wrk, sid)))
break;
session_events = session->vep.ev.events;
@@ -2513,8 +2518,9 @@
int maxevents, u32 n_evts, double wait_for_time)
{
wait_for_time = (wait_for_time == -1) ? (double) 1e6 : wait_for_time;
- return vcl_epoll_wait_handle_mq (wrk, wrk->app_event_queue, events,
- maxevents, wait_for_time, &n_evts);
+ vcl_epoll_wait_handle_mq (wrk, wrk->app_event_queue, events, maxevents,
+ (n_evts ? 0 : wait_for_time), &n_evts);
+ return n_evts;
}
static int
@@ -2583,7 +2589,6 @@
break;
}
}
-
vec_delete (wrk->unhandled_evts_vector, i, 0);
}
diff --git a/src/vnet/session-apps/echo_client.c b/src/vnet/session-apps/echo_client.c
index 4d8089c..c15798d 100644
--- a/src/vnet/session-apps/echo_client.c
+++ b/src/vnet/session-apps/echo_client.c
@@ -62,7 +62,8 @@
svm_fifo_t *f = s->data.tx_fifo;
rv = clib_min (svm_fifo_max_enqueue (f), bytes_this_chunk);
svm_fifo_enqueue_nocopy (f, rv);
- session_send_io_evt_to_thread_custom (f, s->thread_index,
+ session_send_io_evt_to_thread_custom (&f->master_session_index,
+ s->thread_index,
SESSION_IO_EVT_TX);
}
else
@@ -95,7 +96,8 @@
hdr.lcl_port = at->lcl_port;
svm_fifo_enqueue_nowait (f, sizeof (hdr), (u8 *) & hdr);
svm_fifo_enqueue_nocopy (f, rv);
- session_send_io_evt_to_thread_custom (f, s->thread_index,
+ session_send_io_evt_to_thread_custom (&f->master_session_index,
+ s->thread_index,
SESSION_IO_EVT_TX);
}
else
diff --git a/src/vnet/session-apps/proxy.c b/src/vnet/session-apps/proxy.c
index 1ee5f5a..2e03ccc 100644
--- a/src/vnet/session-apps/proxy.c
+++ b/src/vnet/session-apps/proxy.c
@@ -212,7 +212,8 @@
if (svm_fifo_set_event (active_open_tx_fifo))
{
u32 ao_thread_index = active_open_tx_fifo->master_thread_index;
- if (session_send_io_evt_to_thread_custom (active_open_tx_fifo,
+ u32 ao_session_index = active_open_tx_fifo->master_session_index;
+ if (session_send_io_evt_to_thread_custom (&ao_session_index,
ao_thread_index,
SESSION_IO_EVT_TX))
clib_warning ("failed to enqueue tx evt");
@@ -356,7 +357,8 @@
if (svm_fifo_set_event (proxy_tx_fifo))
{
u8 thread_index = proxy_tx_fifo->master_thread_index;
- return session_send_io_evt_to_thread_custom (proxy_tx_fifo,
+ u32 session_index = proxy_tx_fifo->master_session_index;
+ return session_send_io_evt_to_thread_custom (&session_index,
thread_index,
SESSION_IO_EVT_TX);
}
diff --git a/src/vnet/session/application_interface.h b/src/vnet/session/application_interface.h
index d4dfeec..56d034e 100644
--- a/src/vnet/session/application_interface.h
+++ b/src/vnet/session/application_interface.h
@@ -407,7 +407,7 @@
* @return 0 if success, negative integer otherwise
*/
static inline int
-app_send_io_evt_to_vpp (svm_msg_q_t * mq, svm_fifo_t * f, u8 evt_type,
+app_send_io_evt_to_vpp (svm_msg_q_t * mq, u32 session_index, u8 evt_type,
u8 noblock)
{
session_event_t *evt;
@@ -429,7 +429,7 @@
return -2;
}
evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
- evt->fifo = f;
+ evt->session_index = session_index;
evt->event_type = evt_type;
svm_msg_q_add_and_unlock (mq, &msg);
return 0;
@@ -441,7 +441,7 @@
svm_msg_q_wait (mq);
msg = svm_msg_q_alloc_msg_w_ring (mq, SESSION_MQ_IO_EVT_RING);
evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
- evt->fifo = f;
+ evt->session_index = session_index;
evt->event_type = evt_type;
if (svm_msg_q_is_full (mq))
svm_msg_q_wait (mq);
@@ -478,7 +478,8 @@
if ((rv = svm_fifo_enqueue_nowait (f, actual_write, data)) > 0)
{
if (do_evt && svm_fifo_set_event (f))
- app_send_io_evt_to_vpp (vpp_evt_q, f, evt_type, noblock);
+ app_send_io_evt_to_vpp (vpp_evt_q, f->master_session_index, evt_type,
+ noblock);
}
ASSERT (rv);
return rv;
@@ -501,7 +502,8 @@
if ((rv = svm_fifo_enqueue_nowait (f, len, data)) > 0)
{
if (do_evt && svm_fifo_set_event (f))
- app_send_io_evt_to_vpp (vpp_evt_q, f, evt_type, noblock);
+ app_send_io_evt_to_vpp (vpp_evt_q, f->master_session_index, evt_type,
+ noblock);
}
return rv;
}
diff --git a/src/vnet/session/application_worker.c b/src/vnet/session/application_worker.c
index 7c88888..85a6fed 100644
--- a/src/vnet/session/application_worker.c
+++ b/src/vnet/session/application_worker.c
@@ -562,7 +562,7 @@
ASSERT (!svm_msg_q_msg_is_invalid (&msg));
evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
- evt->fifo = s->rx_fifo;
+ evt->session_index = s->rx_fifo->client_session_index;
evt->event_type = SESSION_IO_EVT_RX;
(void) svm_fifo_set_event (s->rx_fifo);
@@ -599,7 +599,7 @@
evt = (session_event_t *) svm_msg_q_msg_data (mq, &msg);
evt->event_type = SESSION_IO_EVT_TX;
- evt->fifo = s->tx_fifo;
+ evt->session_index = s->tx_fifo->client_session_index;
return app_enqueue_evt (mq, &msg, lock);
}
diff --git a/src/vnet/session/session.c b/src/vnet/session/session.c
index 6e24d56..0a294dc 100644
--- a/src/vnet/session/session.c
+++ b/src/vnet/session/session.c
@@ -66,7 +66,7 @@
case SESSION_IO_EVT_TX:
case SESSION_IO_EVT_TX_FLUSH:
case SESSION_IO_EVT_BUILTIN_RX:
- evt->fifo = data;
+ evt->session_index = *(u32 *) data;
break;
case SESSION_IO_EVT_BUILTIN_TX:
case SESSION_CTRL_EVT_CLOSE:
@@ -85,7 +85,8 @@
int
session_send_io_evt_to_thread (svm_fifo_t * f, session_evt_type_t evt_type)
{
- return session_send_evt_to_thread (f, 0, f->master_thread_index, evt_type);
+ return session_send_evt_to_thread (&f->master_session_index, 0,
+ f->master_thread_index, evt_type);
}
int
@@ -560,7 +561,7 @@
continue;
}
- if (svm_fifo_is_empty (s->rx_fifo))
+ if (svm_fifo_has_event (s->rx_fifo) || svm_fifo_is_empty (s->rx_fifo))
continue;
if (PREDICT_FALSE (session_enqueue_notify_inline (s)))
diff --git a/src/vnet/session/session_node.c b/src/vnet/session/session_node.c
index db5123b..7cbd0d9 100644
--- a/src/vnet/session/session_node.c
+++ b/src/vnet/session/session_node.c
@@ -821,7 +821,7 @@
session_t *s = wrk->ctx.s;
application_t *app;
- if (PREDICT_FALSE (s->session_state == SESSION_STATE_CLOSED))
+ if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
return 0;
app = application_get (s->t_app_index);
svm_fifo_unset_event (s->tx_fifo);
@@ -831,7 +831,7 @@
always_inline session_t *
session_event_get_session (session_event_t * e, u8 thread_index)
{
- return session_get_if_valid (e->fifo->master_session_index, thread_index);
+ return session_get_if_valid (e->session_index, thread_index);
}
static void
@@ -1103,7 +1103,7 @@
case SESSION_IO_EVT_RX:
case SESSION_IO_EVT_TX:
case SESSION_IO_EVT_BUILTIN_RX:
- if (e->fifo == f)
+ if (e->session_index == f->master_session_index)
return 1;
break;
case SESSION_CTRL_EVT_CLOSE:
diff --git a/src/vnet/session/session_types.h b/src/vnet/session/session_types.h
index 9e51d69..3b6ab3d 100644
--- a/src/vnet/session/session_types.h
+++ b/src/vnet/session/session_types.h
@@ -326,7 +326,7 @@
u8 postponed;
union
{
- svm_fifo_t *fifo;
+ u32 session_index;
session_handle_t session_handle;
session_rpc_args_t rpc_args;
struct