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authorFlorin Coras <fcoras@cisco.com>2018-09-11 16:33:36 -0700
committerMarco Varlese <marco.varlese@suse.de>2018-09-12 09:13:16 +0000
commit2cba8533cc4444c4615903add9a8f20c7c87079c (patch)
tree3a35e400cd081c34ae5801d71f5fec51c02611df /src/vcl/vppcom.c
parent41c9e04be0ca3a081926045e78dc969dab563532 (diff)
vcl: add apis that expos fifo as buffer
Change-Id: I4bd9c9f73499711e04b38d53daa5c917a4285bf5 Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src/vcl/vppcom.c')
-rw-r--r--src/vcl/vppcom.c128
1 files changed, 106 insertions, 22 deletions
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index 6d6e7d08797..df8f4cae964 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -1274,19 +1274,9 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
return VPPCOM_EINVAL;
s = vcl_session_get_w_handle (wrk, session_handle);
- if (PREDICT_FALSE (!s))
+ if (PREDICT_FALSE (!s || s->is_vep))
return VPPCOM_EBADFD;
- if (PREDICT_FALSE (s->is_vep))
- {
- clib_warning ("VCL<%d>: ERROR: sid %u: cannot "
- "read from an epoll session!", getpid (), session_handle);
- return VPPCOM_EBADFD;
- }
-
- is_nonblocking = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
- rx_fifo = s->rx_fifo;
-
if (PREDICT_FALSE (!vcl_session_is_readable (s)))
{
session_state_t state = s->session_state;
@@ -1299,8 +1289,10 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
return rv;
}
+ is_nonblocking = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
is_ct = vcl_session_is_ct (s);
mq = is_ct ? s->our_evt_q : wrk->app_event_queue;
+ rx_fifo = s->rx_fifo;
if (svm_fifo_is_empty (rx_fifo))
{
@@ -1348,17 +1340,9 @@ vppcom_session_read_internal (uint32_t session_handle, void *buf, int n,
SESSION_IO_EVT_CT_RX, SVM_Q_WAIT);
}
- if (VPPCOM_DEBUG > 2)
- {
- if (n_read > 0)
- clib_warning ("VCL<%d>: vpp handle 0x%llx, sid %u: read %d bytes "
- "from (%p)", getpid (), s->vpp_handle,
- session_handle, n_read, rx_fifo);
- else
- clib_warning ("VCL<%d>: vpp handle 0x%llx, sid %u: nothing read! "
- "returning %d (%s)", getpid (), s->vpp_handle,
- session_handle, n_read, vppcom_retval_str (n_read));
- }
+ VDBG (2, "VCL<%d>: vpp handle 0x%llx, sid %u: read %d bytes from (%p)",
+ getpid (), s->vpp_handle, session_handle, n_read, rx_fifo);
+
return n_read;
}
@@ -1374,6 +1358,93 @@ vppcom_session_peek (uint32_t session_handle, void *buf, int n)
return (vppcom_session_read_internal (session_handle, buf, n, 1));
}
+int
+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;
+ vcl_session_t *s = 0;
+ svm_fifo_t *rx_fifo;
+ svm_msg_q_msg_t msg;
+ session_event_t *e;
+ svm_msg_q_t *mq;
+ u8 is_ct;
+
+ s = vcl_session_get_w_handle (wrk, 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;
+ }
+
+ is_nonblocking = VCL_SESS_ATTR_TEST (s->attr, VCL_SESS_ATTR_NONBLOCK);
+ is_ct = vcl_session_is_ct (s);
+ mq = is_ct ? s->our_evt_q : wrk->app_event_queue;
+ rx_fifo = s->rx_fifo;
+
+ if (svm_fifo_is_empty (rx_fifo))
+ {
+ if (is_nonblocking)
+ {
+ svm_fifo_unset_event (rx_fifo);
+ return VPPCOM_OK;
+ }
+ while (svm_fifo_is_empty (rx_fifo))
+ {
+ svm_fifo_unset_event (rx_fifo);
+ svm_msg_q_lock (mq);
+ if (svm_msg_q_is_empty (mq))
+ svm_msg_q_wait (mq);
+
+ svm_msg_q_sub_w_lock (mq, &msg);
+ 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))
+ {
+ vcl_handle_mq_ctrl_event (wrk, e);
+ svm_msg_q_free_msg (mq, &msg);
+ continue;
+ }
+ svm_msg_q_free_msg (mq, &msg);
+
+ if (PREDICT_FALSE (s->session_state == STATE_CLOSE_ON_EMPTY))
+ return 0;
+ }
+ }
+
+ n_read = svm_fifo_segments (rx_fifo, (svm_fifo_segment_t *) ds);
+ svm_fifo_unset_event (rx_fifo);
+
+ if (is_ct && n_read + svm_fifo_max_dequeue (rx_fifo) == rx_fifo->nitems)
+ {
+ /* If the peer is not polling send notification */
+ if (!svm_fifo_has_event (s->rx_fifo))
+ app_send_io_evt_to_vpp (s->vpp_evt_q, s->rx_fifo,
+ SESSION_IO_EVT_CT_RX, SVM_Q_WAIT);
+ }
+
+ return n_read;
+}
+
+void
+vppcom_session_free_segments (uint32_t session_handle,
+ vppcom_data_segments_t ds)
+{
+ vcl_worker_t *wrk = vcl_worker_get_current ();
+ vcl_session_t *s;
+
+ s = vcl_session_get_w_handle (wrk, session_handle);
+ if (PREDICT_FALSE (!s || s->is_vep))
+ return;
+
+ svm_fifo_segments_free (s->rx_fifo, (svm_fifo_segment_t *) ds);
+}
+
static inline int
vppcom_session_read_ready (vcl_session_t * session)
{
@@ -1405,6 +1476,19 @@ vppcom_session_read_ready (vcl_session_t * session)
return svm_fifo_max_dequeue (session->rx_fifo);
}
+int
+vppcom_data_segment_copy (void *buf, vppcom_data_segments_t ds, u32 max_bytes)
+{
+ u32 first_copy = clib_min (ds[0].len, max_bytes);
+ clib_memcpy (buf, ds[0].data, first_copy);
+ if (first_copy < max_bytes)
+ {
+ clib_memcpy (buf + first_copy, ds[1].data,
+ clib_min (ds[1].len, max_bytes - first_copy));
+ }
+ return 0;
+}
+
static u8
vcl_is_tx_evt_for_session (session_event_t * e, u32 sid, u8 is_ct)
{