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-rw-r--r--src/svm/svm_fifo.c47
-rw-r--r--src/svm/svm_fifo.h12
-rw-r--r--src/vcl/vcl_private.h1
-rw-r--r--src/vcl/vcl_test.h42
-rw-r--r--src/vcl/vcl_test_client.c19
-rw-r--r--src/vcl/vcl_test_server.c111
-rw-r--r--src/vcl/vppcom.c128
-rw-r--r--src/vcl/vppcom.h15
8 files changed, 320 insertions, 55 deletions
diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c
index 018827e0343..0c258b4259c 100644
--- a/src/svm/svm_fifo.c
+++ b/src/svm/svm_fifo.c
@@ -835,6 +835,53 @@ svm_fifo_dequeue_drop_all (svm_fifo_t * f)
__sync_fetch_and_sub (&f->cursize, f->cursize);
}
+int
+svm_fifo_segments (svm_fifo_t * f, svm_fifo_segment_t * fs)
+{
+ u32 cursize, nitems;
+
+ /* read cursize, which can only increase while we're working */
+ cursize = svm_fifo_max_dequeue (f);
+ if (PREDICT_FALSE (cursize == 0))
+ return -2;
+
+ nitems = f->nitems;
+
+ fs[0].len = ((nitems - f->head) < cursize) ? (nitems - f->head) : cursize;
+ fs[0].data = f->data + f->head;
+
+ if (fs[0].len < cursize)
+ {
+ fs[1].len = cursize - fs[0].len;
+ fs[1].data = f->data;
+ }
+ else
+ {
+ fs[1].len = 0;
+ fs[1].data = 0;
+ }
+ return cursize;
+}
+
+void
+svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_segment_t * fs)
+{
+ u32 total_drop_bytes;
+
+ ASSERT (fs[0].data == f->data + f->head);
+ if (fs[1].len)
+ {
+ f->head = fs[1].len;
+ total_drop_bytes = fs[0].len + fs[1].len;
+ }
+ else
+ {
+ f->head = (f->head + fs[0].len) % f->nitems;
+ total_drop_bytes = fs[0].len;
+ }
+ __sync_fetch_and_sub (&f->cursize, total_drop_bytes);
+}
+
u32
svm_fifo_number_ooo_segments (svm_fifo_t * f)
{
diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index a8aea00996e..ec32fd5f40d 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -85,6 +85,12 @@ typedef enum
SVM_FIFO_FULL = -2,
} svm_fifo_err_t;
+typedef struct svm_fifo_segment_
+{
+ u8 *data;
+ u32 len;
+} svm_fifo_segment_t;
+
#if SVM_FIFO_TRACE
#define svm_fifo_trace_add(_f, _s, _l, _t) \
{ \
@@ -147,8 +153,8 @@ svm_fifo_has_ooo_data (svm_fifo_t * f)
always_inline u8
svm_fifo_set_event (svm_fifo_t * f)
{
-// return __sync_lock_test_and_set (&f->has_event, 1) == 0;
-// return __sync_bool_compare_and_swap (&f->has_event, 0, 1);
+ /* return __sync_lock_test_and_set (&f->has_event, 1) == 0;
+ return __sync_bool_compare_and_swap (&f->has_event, 0, 1); */
return !__atomic_exchange_n (&f->has_event, 1, __ATOMIC_RELEASE);
}
@@ -175,6 +181,8 @@ int svm_fifo_dequeue_nowait (svm_fifo_t * f, u32 max_bytes, u8 * copy_here);
int svm_fifo_peek (svm_fifo_t * f, u32 offset, u32 max_bytes, u8 * copy_here);
int svm_fifo_dequeue_drop (svm_fifo_t * f, u32 max_bytes);
void svm_fifo_dequeue_drop_all (svm_fifo_t * f);
+int svm_fifo_segments (svm_fifo_t * f, svm_fifo_segment_t * fs);
+void svm_fifo_segments_free (svm_fifo_t * f, svm_fifo_segment_t * fs);
u32 svm_fifo_number_ooo_segments (svm_fifo_t * f);
ooo_segment_t *svm_fifo_first_ooo_segment (svm_fifo_t * f);
void svm_fifo_init_pointers (svm_fifo_t * f, u32 pointer);
diff --git a/src/vcl/vcl_private.h b/src/vcl/vcl_private.h
index 11d957a1317..5f3c1ecd63f 100644
--- a/src/vcl/vcl_private.h
+++ b/src/vcl/vcl_private.h
@@ -139,6 +139,7 @@ do { \
typedef struct
{
+ CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
#define _(type, name) type name;
foreach_app_session_field
#undef _
diff --git a/src/vcl/vcl_test.h b/src/vcl/vcl_test.h
index 8808c0f5c5e..83e63e1a4e7 100644
--- a/src/vcl/vcl_test.h
+++ b/src/vcl/vcl_test.h
@@ -77,11 +77,43 @@ vcl_test_read (int fd, uint8_t *buf, uint32_t nbytes,
if (rx_bytes < 0)
{
- errno_val = errno;
- perror ("ERROR in sock_test_read()");
- fprintf (stderr, "SOCK_TEST: ERROR: socket read "
- "failed (errno = %d)!\n", errno_val);
- errno = errno_val;
+ vterr ("vppcom_session_read()", -errno);
+ }
+ else if (stats)
+ stats->rx_bytes += rx_bytes;
+
+ return (rx_bytes);
+}
+
+static inline int
+vcl_test_read_ds (int fd, vppcom_data_segments_t ds, sock_test_stats_t *stats)
+{
+ int rx_bytes, errno_val;
+
+ do
+ {
+ if (stats)
+ stats->rx_xacts++;
+ rx_bytes = vppcom_session_read_segments (fd, ds);
+
+ if (rx_bytes < 0)
+ {
+ errno = -rx_bytes;
+ rx_bytes = -1;
+ }
+ if (stats)
+ {
+ if ((rx_bytes == 0) ||
+ ((rx_bytes < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK))))
+ stats->rx_eagain++;
+ }
+ }
+ while ((rx_bytes == 0) ||
+ ((rx_bytes < 0) && ((errno == EAGAIN) || (errno == EWOULDBLOCK))));
+
+ if (rx_bytes < 0)
+ {
+ vterr ("vppcom_session_read()", -errno);
}
else if (stats)
stats->rx_bytes += rx_bytes;
diff --git a/src/vcl/vcl_test_client.c b/src/vcl/vcl_test_client.c
index 899d729c47d..c92f0cb754d 100644
--- a/src/vcl/vcl_test_client.c
+++ b/src/vcl/vcl_test_client.c
@@ -314,6 +314,7 @@ vtc_worker_sessions_exit (vcl_test_client_worker_t * wrk)
(void) vcl_test_write (tsock->fd, (uint8_t *) & tsock->cfg,
sizeof (tsock->cfg), &tsock->stats, verbose);
}
+ wrk->n_sessions = 0;
}
static void *
@@ -322,10 +323,10 @@ vtc_worker_loop (void *arg)
vcl_test_client_main_t *vcm = &vcl_client_main;
sock_test_socket_t *ctrl = &vcm->ctrl_socket;
vcl_test_client_worker_t *wrk = arg;
+ uint32_t n_active_sessions, n_bytes;
fd_set _wfdset, *wfdset = &_wfdset;
fd_set _rfdset, *rfdset = &_rfdset;
sock_test_socket_t *tsock;
- uint32_t n_active_sessions;
int i, rv, check_rx = 0;
rv = vtc_worker_init (wrk);
@@ -374,8 +375,11 @@ vtc_worker_loop (void *arg)
if (FD_ISSET (vppcom_session_index (tsock->fd), wfdset)
&& tsock->stats.tx_bytes < tsock->cfg.total_bytes)
{
+ n_bytes = tsock->cfg.txbuf_size;
+ if (tsock->cfg.test == SOCK_TEST_TYPE_ECHO)
+ n_bytes = strlen (ctrl->txbuf) + 1;
rv = vcl_test_write (tsock->fd, (uint8_t *) tsock->txbuf,
- tsock->cfg.txbuf_size, &tsock->stats,
+ n_bytes, &tsock->stats,
tsock->cfg.verbose);
if (rv < 0)
{
@@ -396,7 +400,8 @@ vtc_worker_loop (void *arg)
}
exit:
vtinf ("Worker %d done ...", wrk->wrk_index);
- vtc_accumulate_stats (wrk, ctrl);
+ if (tsock->cfg.test != SOCK_TEST_TYPE_ECHO)
+ vtc_accumulate_stats (wrk, ctrl);
sleep (1);
vtc_worker_sessions_exit (wrk);
if (wrk->wrk_index)
@@ -462,9 +467,11 @@ vtc_echo_client (vcl_test_client_main_t * vcm)
vtc_worker_loop (wrk);
- clock_gettime (CLOCK_REALTIME, &ctrl->stats.stop);
- vtc_accumulate_stats (wrk, ctrl);
- vtc_print_stats (ctrl);
+ /* Not relevant for echo test
+ clock_gettime (CLOCK_REALTIME, &ctrl->stats.stop);
+ vtc_accumulate_stats (wrk, ctrl);
+ vtc_print_stats (ctrl);
+ */
}
static void
diff --git a/src/vcl/vcl_test_server.c b/src/vcl/vcl_test_server.c
index 7c1bef62d6d..a184d995372 100644
--- a/src/vcl/vcl_test_server.c
+++ b/src/vcl/vcl_test_server.c
@@ -38,6 +38,7 @@ typedef struct
sock_test_stats_t stats;
vppcom_endpt_t endpt;
uint8_t ip[16];
+ vppcom_data_segments_t ds;
} vcl_test_server_conn_t;
typedef struct
@@ -72,6 +73,7 @@ typedef struct
struct sockaddr_storage servaddr;
volatile int worker_fails;
volatile int active_workers;
+ u8 use_ds;
} vcl_test_server_main_t;
static __thread int __wrk_index = 0;
@@ -196,6 +198,7 @@ vts_server_start_stop (vcl_test_server_worker_t * wrk,
sync_config_and_reply (conn, rx_cfg);
vtinf ("(fd %d): %s-directional Stream Test Complete!\n"
SOCK_TEST_BANNER_STRING "\n", conn->fd, is_bi ? "Bi" : "Uni");
+ memset (&conn->stats, 0, sizeof (conn->stats));
}
else
{
@@ -217,12 +220,27 @@ vts_server_start_stop (vcl_test_server_worker_t * wrk,
static inline void
vts_server_rx (vcl_test_server_conn_t * conn, int rx_bytes)
{
+ vcl_test_server_main_t *vts = &sock_server_main;
int client_fd = conn->fd;
- sock_test_t test = conn->cfg.test;
- if (test == SOCK_TEST_TYPE_BI)
- (void) vcl_test_write (client_fd, conn->buf, rx_bytes, &conn->stats,
- conn->cfg.verbose);
+ if (conn->cfg.test == SOCK_TEST_TYPE_BI)
+ {
+ if (vts->use_ds)
+ {
+ (void) vcl_test_write (client_fd, conn->ds[0].data, conn->ds[0].len,
+ &conn->stats, conn->cfg.verbose);
+ if (conn->ds[1].len)
+ (void) vcl_test_write (client_fd, conn->ds[1].data,
+ conn->ds[1].len, &conn->stats,
+ conn->cfg.verbose);
+ }
+ else
+ (void) vcl_test_write (client_fd, conn->buf, rx_bytes, &conn->stats,
+ conn->cfg.verbose);
+ }
+
+ if (vts->use_ds)
+ vppcom_session_free_segments (conn->fd, conn->ds);
if (conn->stats.rx_bytes >= conn->cfg.total_bytes)
clock_gettime (CLOCK_REALTIME, &conn->stats.stop);
@@ -231,11 +249,13 @@ vts_server_rx (vcl_test_server_conn_t * conn, int rx_bytes)
static void
vts_server_echo (vcl_test_server_conn_t * conn, int rx_bytes)
{
+ vcl_test_server_main_t *vts = &sock_server_main;
int tx_bytes, nbytes, pos;
- /* If it looks vaguely like a string,
- * make sure it's terminated
- */
+ if (vts->use_ds)
+ vppcom_data_segment_copy (conn->buf, conn->ds, rx_bytes);
+
+ /* If it looks vaguely like a string, make sure it's terminated */
pos = rx_bytes < conn->buf_size ? rx_bytes : conn->buf_size - 1;
((char *) conn->buf)[pos] = 0;
vtinf ("(fd %d): RX (%d bytes) - '%s'", conn->fd, rx_bytes, conn->buf);
@@ -349,7 +369,7 @@ vcl_test_server_process_opts (vcl_test_server_main_t * ssm, int argc,
ssm->cfg.proto = VPPCOM_PROTO_TCP;
opterr = 0;
- while ((c = getopt (argc, argv, "6Dw:")) != -1)
+ while ((c = getopt (argc, argv, "6Dsw:")) != -1)
switch (c)
{
case '6':
@@ -367,7 +387,9 @@ vcl_test_server_process_opts (vcl_test_server_main_t * ssm, int argc,
else
vtwrn ("Invalid number of workers %d", v);
break;
-
+ case 's':
+ ssm->use_ds = 1;
+ break;
case '?':
switch (optopt)
{
@@ -501,6 +523,53 @@ vts_worker_init (vcl_test_server_worker_t * wrk)
vtinf ("Waiting for a client to connect on port %d ...", ssm->cfg.port);
}
+static int
+vts_conn_expect_config (vcl_test_server_conn_t * conn)
+{
+ if (conn->cfg.test == SOCK_TEST_TYPE_ECHO)
+ return 1;
+
+ return (conn->stats.rx_bytes < 128
+ || conn->stats.rx_bytes > conn->cfg.total_bytes);
+}
+
+static sock_test_cfg_t *
+vts_conn_read_config (vcl_test_server_conn_t * conn)
+{
+ vcl_test_server_main_t *vts = &sock_server_main;
+
+ if (vts->use_ds)
+ {
+ /* We could avoid the copy if the first segment is big enough but this
+ * just simplifies things */
+ vppcom_data_segment_copy (conn->buf, conn->ds,
+ sizeof (sock_test_cfg_t));
+ vppcom_session_free_segments (conn->fd, conn->ds);
+ }
+ return (sock_test_cfg_t *) conn->buf;
+}
+
+static inline int
+vts_conn_read (vcl_test_server_conn_t * conn)
+{
+ vcl_test_server_main_t *vts = &sock_server_main;
+ if (vts->use_ds)
+ return vcl_test_read_ds (conn->fd, conn->ds, &conn->stats);
+ else
+ return vcl_test_read (conn->fd, conn->buf, conn->buf_size, &conn->stats);
+}
+
+static inline int
+vts_conn_has_ascii (vcl_test_server_conn_t * conn)
+{
+ vcl_test_server_main_t *vts = &sock_server_main;
+
+ if (vts->use_ds)
+ return isascii (conn->ds[0].data[0]);
+ else
+ return isascii (conn->buf[0]);
+}
+
static void *
vts_worker_loop (void *arg)
{
@@ -550,8 +619,7 @@ vts_worker_loop (void *arg)
if (EPOLLIN & wrk->wait_events[i].events)
{
read_again:
- rx_bytes = vcl_test_read (conn->fd, conn->buf,
- conn->buf_size, &conn->stats);
+ rx_bytes = vts_conn_read (conn);
if (rx_bytes <= 0)
{
@@ -564,16 +632,19 @@ vts_worker_loop (void *arg)
continue;
}
- rx_cfg = (sock_test_cfg_t *) conn->buf;
- if (rx_cfg->magic == SOCK_TEST_CFG_CTRL_MAGIC)
+ if (vts_conn_expect_config (conn))
{
- vts_handle_cfg (wrk, rx_cfg, conn, rx_bytes);
- if (!wrk->nfds)
+ rx_cfg = vts_conn_read_config (conn);
+ if (rx_cfg->magic == SOCK_TEST_CFG_CTRL_MAGIC)
{
- vtinf ("All client connections closed\n");
- goto done;
+ vts_handle_cfg (wrk, rx_cfg, conn, rx_bytes);
+ if (!wrk->nfds)
+ {
+ vtinf ("All client connections closed\n");
+ goto done;
+ }
+ continue;
}
- continue;
}
if ((conn->cfg.test == SOCK_TEST_TYPE_UNI)
|| (conn->cfg.test == SOCK_TEST_TYPE_BI))
@@ -584,7 +655,7 @@ vts_worker_loop (void *arg)
goto read_again;
continue;
}
- if (isascii (conn->buf[0]))
+ if (vts_conn_has_ascii (conn))
{
vts_server_echo (conn, rx_bytes);
}
@@ -621,7 +692,7 @@ main (int argc, char **argv)
clib_mem_init_thread_safe (0, 64 << 20);
vsm->cfg.port = SOCK_TEST_SERVER_PORT;
vsm->cfg.workers = 1;
- vsm->active_workers = 1;
+ vsm->active_workers = 0;
vcl_test_server_process_opts (vsm, argc, argv);
rv = vppcom_app_create ("vcl_test_server");
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)
{
diff --git a/src/vcl/vppcom.h b/src/vcl/vppcom.h
index b5e753292ec..63466844a3f 100644
--- a/src/vcl/vppcom.h
+++ b/src/vcl/vppcom.h
@@ -147,6 +147,14 @@ typedef struct _vcl_poll
short *revents;
} vcl_poll_t;
+typedef struct vppcom_data_segment_
+{
+ unsigned char *data;
+ uint32_t len;
+} vppcom_data_segment_t;
+
+typedef vppcom_data_segment_t vppcom_data_segments_t[2];
+
/*
* VPPCOM Public API Functions
*/
@@ -255,6 +263,13 @@ extern int vppcom_poll (vcl_poll_t * vp, uint32_t n_sids,
extern int vppcom_mq_epoll_fd (void);
extern int vppcom_session_index (uint32_t session_handle);
+extern int vppcom_session_read_segments (uint32_t session_handle,
+ vppcom_data_segments_t ds);
+extern void vppcom_session_free_segments (uint32_t session_handle,
+ vppcom_data_segments_t ds);
+extern int vppcom_data_segment_copy (void *buf, vppcom_data_segments_t ds,
+ uint32_t max_bytes);
+
/**
* Request from application to register a new worker
*