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-rw-r--r--src/plugins/memif/memif.c38
1 files changed, 36 insertions, 2 deletions
diff --git a/src/plugins/memif/memif.c b/src/plugins/memif/memif.c
index c2df8d3b12e..c216a165d46 100644
--- a/src/plugins/memif/memif.c
+++ b/src/plugins/memif/memif.c
@@ -70,6 +70,7 @@ memif_disconnect (memif_if_t * mif, clib_error_t * err)
{
memif_main_t *mm = &memif_main;
vnet_main_t *vnm = vnet_get_main ();
+ vlib_main_t *vm = vlib_get_main ();
memif_region_t *mr;
memif_queue_t *mq;
int i;
@@ -126,7 +127,19 @@ memif_disconnect (memif_if_t * mif, clib_error_t * err)
memif_log_warn (mif,
"Unable to unassign interface %d, queue %d: rc=%d",
mif->hw_if_index, i, rv);
- mq->ring = 0;
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ {
+
+ u16 cur_slot,last_slot, start;
+ u16 ring_size = 1 << mq->log2_ring_size;
+ u16 mask = ring_size - 1;
+ cur_slot = mq->last_tail;
+ last_slot = mq->ring->head - 1 ;
+ start = (mq->last_tail & mask);
+ u16 n_slots = ((last_slot - cur_slot) & mask) + 1;
+ vlib_buffer_free_from_ring(vm,mq->buffers,start,ring_size,n_slots);
+ }
+ mq->ring = 0;
}
}
@@ -136,7 +149,28 @@ memif_disconnect (memif_if_t * mif, clib_error_t * err)
vec_free (mif->rx_queues);
vec_foreach (mq, mif->tx_queues)
- memif_queue_intfd_close (mq);
+ {
+ if (mif->flags & MEMIF_IF_FLAG_ZERO_COPY)
+ {
+ memif_ring_t *ring = mq->ring;
+ u16 cur_slot,last_slot, start;
+ u16 ring_size = 1 << mq->log2_ring_size;
+ u16 mask = ring_size - 1;
+ u16 n_slots = ring->tail - mq->last_tail;
+ cur_slot = mq->last_tail;
+ last_slot = mq->ring->head;
+ start = (mq->last_tail & mask);
+ if(last_slot > cur_slot)
+ n_slots = n_slots + ((last_slot - cur_slot)) ;
+ else if (last_slot < cur_slot)
+ n_slots = n_slots + (cur_slot - last_slot);
+ vlib_buffer_free_from_ring_no_next (vm, mq->buffers,
+ start,
+ ring_size, n_slots);
+ }
+ memif_queue_intfd_close (mq);
+ }
+
vec_free (mif->tx_queues);
/* free memory regions */