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-rw-r--r--src/vcl/vcl_private.h28
-rw-r--r--src/vcl/vppcom.c75
2 files changed, 55 insertions, 48 deletions
diff --git a/src/vcl/vcl_private.h b/src/vcl/vcl_private.h
index c61bb0b9247..39c9e7207c7 100644
--- a/src/vcl/vcl_private.h
+++ b/src/vcl/vcl_private.h
@@ -504,6 +504,34 @@ vcl_session_is_ct (vcl_session_t * s)
return (s->our_evt_q != 0);
}
+static inline u8
+vcl_session_is_open (vcl_session_t * s)
+{
+ return ((s->session_state & STATE_OPEN)
+ || (s->session_state == STATE_LISTEN
+ && s->session_type == VPPCOM_PROTO_UDP));
+}
+
+static inline u8
+vcl_session_is_closing (vcl_session_t * s)
+{
+ return (s->session_state == STATE_VPP_CLOSING
+ || s->session_state == STATE_DISCONNECT);
+}
+
+static inline int
+vcl_session_closing_error (vcl_session_t * s)
+{
+ return s->session_state == STATE_DISCONNECT ? VPPCOM_ECONNRESET : 0;
+}
+
+static inline int
+vcl_session_closed_error (vcl_session_t * s)
+{
+ return s->session_state == STATE_DISCONNECT
+ ? VPPCOM_ECONNRESET : VPPCOM_ENOTCONN;
+}
+
/*
* Helpers
*/
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 570e323bb49..3c3e15d146c 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -661,7 +661,6 @@ vcl_handle_mq_event (vcl_worker_t * wrk, session_event_t * e)
session = vcl_session_disconnected_handler (wrk, disconnected_msg);
if (!session)
break;
- session->session_state = STATE_DISCONNECT;
VDBG (0, "disconnected session %u [0x%llx]", session->session_index,
session->vpp_handle);
break;
@@ -1514,20 +1513,12 @@ vcl_is_rx_evt_for_session (session_event_t * e, u32 sid, u8 is_ct)
return (e->event_type == SESSION_IO_EVT_CT_TX);
}
-static inline u8
-vcl_session_is_readable (vcl_session_t * s)
-{
- return ((s->session_state & STATE_OPEN)
- || (s->session_state == STATE_LISTEN
- && s->session_type == VPPCOM_PROTO_UDP));
-}
-
static inline int
vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
u8 peek)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
- int n_read = 0, rv, is_nonblocking;
+ int n_read = 0, is_nonblocking;
vcl_session_t *s = 0;
svm_fifo_t *rx_fifo;
svm_msg_q_msg_t msg;
@@ -1542,15 +1533,12 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
if (PREDICT_FALSE (!s || s->is_vep))
return VPPCOM_EBADFD;
- if (PREDICT_FALSE (!vcl_session_is_readable (s)))
+ if (PREDICT_FALSE (!vcl_session_is_open (s)))
{
- session_state_t state = s->session_state;
- rv = ((state & STATE_DISCONNECT) ? VPPCOM_ECONNRESET : VPPCOM_ENOTCONN);
-
- VDBG (0, "session handle %u[0x%llx] is not open! state 0x%x (%s),"
- " returning %d (%s)", session_handle, s->vpp_handle, state,
- vppcom_session_state_str (state), rv, vppcom_retval_str (rv));
- return rv;
+ VDBG (0, "session handle %u[0x%llx] is not open! state 0x%x (%s)",
+ s->session_index, s->vpp_handle, s->session_state,
+ vppcom_session_state_str (s->session_state));
+ return vcl_session_closed_error (s);
}
is_nonblocking = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
@@ -1568,6 +1556,9 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
}
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_msg_q_lock (mq);
if (svm_msg_q_is_empty (mq))
@@ -1579,9 +1570,6 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
if (!vcl_is_rx_evt_for_session (e, s->session_index, is_ct))
vcl_handle_mq_event (wrk, e);
svm_msg_q_free_msg (mq, &msg);
-
- if (PREDICT_FALSE (s->session_state == STATE_DISCONNECT))
- return VPPCOM_ECONNRESET;
}
}
@@ -1623,7 +1611,7 @@ vppcom_session_read_segments (uint32_t session_handle,
vppcom_data_segments_t ds)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
- int n_read = 0, rv, is_nonblocking;
+ int n_read = 0, is_nonblocking;
vcl_session_t *s = 0;
svm_fifo_t *rx_fifo;
svm_msg_q_msg_t msg;
@@ -1635,12 +1623,8 @@ vppcom_session_read_segments (uint32_t session_handle,
if (PREDICT_FALSE (!s || s->is_vep))
return VPPCOM_EBADFD;
- if (PREDICT_FALSE (!vcl_session_is_readable (s)))
- {
- session_state_t state = s->session_state;
- rv = ((state & STATE_DISCONNECT) ? VPPCOM_ECONNRESET : VPPCOM_ENOTCONN);
- return rv;
- }
+ if (PREDICT_FALSE (!vcl_session_is_open (s)))
+ return vcl_session_closed_error (s);
is_nonblocking = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
is_ct = vcl_session_is_ct (s);
@@ -1657,6 +1641,9 @@ vppcom_session_read_segments (uint32_t session_handle,
}
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_msg_q_lock (mq);
if (svm_msg_q_is_empty (mq))
@@ -1668,9 +1655,6 @@ vppcom_session_read_segments (uint32_t session_handle,
if (!vcl_is_rx_evt_for_session (e, s->session_index, is_ct))
vcl_handle_mq_event (wrk, e);
svm_msg_q_free_msg (mq, &msg);
-
- if (PREDICT_FALSE (s->session_state == STATE_DISCONNECT))
- return VPPCOM_ECONNRESET;
}
}
@@ -1730,7 +1714,7 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
u8 is_flush)
{
vcl_worker_t *wrk = vcl_worker_get_current ();
- int rv, n_write, is_nonblocking;
+ int n_write, is_nonblocking;
vcl_session_t *s = 0;
svm_fifo_t *tx_fifo = 0;
session_evt_type_t et;
@@ -1748,21 +1732,17 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
if (PREDICT_FALSE (s->is_vep))
{
- clib_warning ("VCL<%d>: ERROR: vpp handle 0x%llx, sid %u: "
- "cannot write to an epoll session!",
- getpid (), s->vpp_handle, session_handle);
-
+ VDBG (0, "ERROR: session %u [0x%llx]: cannot write to an epoll"
+ " session!", s->session_index, s->vpp_handle);
return VPPCOM_EBADFD;
}
- if (PREDICT_FALSE (!(s->session_state & STATE_OPEN)))
+ if (PREDICT_FALSE (!vcl_session_is_open (s)))
{
- session_state_t state = s->session_state;
- rv = ((state & STATE_DISCONNECT) ? VPPCOM_ECONNRESET : VPPCOM_ENOTCONN);
- VDBG (1, "VCL<%d>: vpp handle 0x%llx, sid %u: session is not open! "
- "state 0x%x (%s)", getpid (), s->vpp_handle, session_handle,
- state, vppcom_session_state_str (state));
- return rv;
+ VDBG (1, "session %u [0x%llx]: is not open! state 0x%x (%s)",
+ s->session_index, s->vpp_handle, s->session_state,
+ vppcom_session_state_str (s->session_state));
+ return vcl_session_closed_error (s);;
}
tx_fifo = s->tx_fifo;
@@ -1778,6 +1758,8 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
while (svm_fifo_is_full (tx_fifo))
{
svm_fifo_add_want_tx_ntf (tx_fifo, SVM_FIFO_WANT_TX_NOTIF);
+ if (vcl_session_is_closing (s))
+ return vcl_session_closing_error (s);
svm_msg_q_lock (mq);
if (svm_msg_q_is_empty (mq))
svm_msg_q_wait (mq);
@@ -1789,9 +1771,6 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
if (!vcl_is_tx_evt_for_session (e, s->session_index, is_ct))
vcl_handle_mq_event (wrk, e);
svm_msg_q_free_msg (mq, &msg);
-
- if (PREDICT_FALSE (!(s->session_state & STATE_OPEN)))
- return VPPCOM_ECONNRESET;
}
}
@@ -1809,8 +1788,8 @@ vppcom_session_write_inline (uint32_t session_handle, void *buf, size_t n,
ASSERT (n_write > 0);
- VDBG (2, "VCL<%d>: vpp handle 0x%llx, sid %u: wrote %d bytes", getpid (),
- s->vpp_handle, session_handle, n_write);
+ VDBG (2, "session %u [0x%llx]: wrote %d bytes", s->session_index,
+ s->vpp_handle, n_write);
return n_write;
}