+int
+echo_attach_session (uword segment_handle, uword rxf_offset, uword txf_offset,
+ uword mq_offset, echo_session_t *s)
+{
+ echo_main_t *em = &echo_main;
+ u32 fs_index, eqs_index;
+ fifo_segment_t *fs;
+
+ fs_index = echo_segment_lookup (segment_handle);
+ if (fs_index == (u32) ~0)
+ {
+ ECHO_LOG (0, "ERROR: segment for session %u is not mounted!",
+ s->session_index);
+ return -1;
+ }
+
+ if (mq_offset != (uword) ~0)
+ {
+ eqs_index = echo_segment_lookup (ECHO_MQ_SEG_HANDLE);
+ ASSERT (eqs_index != (u32) ~0);
+ }
+
+ clib_spinlock_lock (&em->segment_handles_lock);
+
+ fs = fifo_segment_get_segment (&em->segment_main, fs_index);
+ s->rx_fifo = fifo_segment_alloc_fifo_w_offset (fs, rxf_offset);
+ s->tx_fifo = fifo_segment_alloc_fifo_w_offset (fs, txf_offset);
+ s->rx_fifo->segment_index = fs_index;
+ s->tx_fifo->segment_index = fs_index;
+ s->rx_fifo->shr->client_session_index = s->session_index;
+ s->tx_fifo->shr->client_session_index = s->session_index;
+
+ if (mq_offset != (uword) ~0)
+ {
+ fs = fifo_segment_get_segment (&em->segment_main, eqs_index);
+ s->vpp_evt_q = fifo_segment_msg_q_attach (fs, mq_offset,
+ s->rx_fifo->shr->slice_index);
+ }
+
+ clib_spinlock_unlock (&em->segment_handles_lock);
+
+ return 0;
+}
+
+int
+echo_segment_attach_mq (uword segment_handle, uword mq_offset, u32 mq_index,
+ svm_msg_q_t **mq)
+{
+ echo_main_t *em = &echo_main;
+ fifo_segment_t *fs;
+ u32 fs_index;
+
+ fs_index = echo_segment_lookup (segment_handle);
+ if (fs_index == (u32) ~0)
+ {
+ ECHO_LOG (0, "ERROR: mq segment %lx for is not attached!",
+ segment_handle);
+ return -1;
+ }
+
+ clib_spinlock_lock (&em->segment_handles_lock);
+
+ fs = fifo_segment_get_segment (&em->segment_main, fs_index);
+ *mq = fifo_segment_msg_q_attach (fs, mq_offset, mq_index);
+
+ clib_spinlock_unlock (&em->segment_handles_lock);
+
+ return 0;
+}
+
+svm_fifo_chunk_t *
+echo_segment_alloc_chunk (uword segment_handle, u32 slice_index, u32 size,
+ uword *offset)
+{
+ echo_main_t *em = &echo_main;
+ svm_fifo_chunk_t *c;
+ fifo_segment_t *fs;
+ u32 fs_index;
+
+ fs_index = echo_segment_lookup (segment_handle);
+ if (fs_index == (u32) ~0)
+ {
+ ECHO_LOG (0, "ERROR: mq segment %lx for is not attached!",
+ segment_handle);
+ return 0;
+ }
+
+ clib_spinlock_lock (&em->segment_handles_lock);
+
+ fs = fifo_segment_get_segment (&em->segment_main, fs_index);
+ c = fifo_segment_alloc_chunk_w_slice (fs, slice_index, size);
+ *offset = fifo_segment_chunk_offset (fs, c);
+
+ clib_spinlock_unlock (&em->segment_handles_lock);
+
+ return c;
+}
+