virtio: add the buffer allocation error
Type: improvement
#define foreach_virtio_input_error \
+ _(BUFFER_ALLOC, "buffer alloc error") \
_(UNKNOWN, "unknown")
typedef enum
@@ -81,9 +82,9 @@ format_virtio_input_trace (u8 * s, va_list * args)
static_always_inline void
virtio_refill_vring (vlib_main_t * vm, virtio_if_t * vif,
virtio_if_type_t type, virtio_vring_t * vring,
- const int hdr_sz)
+ const int hdr_sz, u32 node_index)
{
- u16 used, next, avail, n_slots;
+ u16 used, next, avail, n_slots, n_refill;
u16 sz = vring->size;
u16 mask = sz - 1;
@@ -94,17 +95,22 @@ more:
return;
/* deliver free buffers in chunks of 64 */
- n_slots = clib_min (sz - used, 64);
+ n_refill = clib_min (sz - used, 64);
next = vring->desc_next;
avail = vring->avail->idx;
n_slots =
vlib_buffer_alloc_to_ring_from_pool (vm, vring->buffers, next,
- vring->size, n_slots,
+ vring->size, n_refill,
vring->buffer_pool_index);
+ if (PREDICT_FALSE (n_slots != n_refill))
+ {
+ vlib_error_count (vm, node_index,
+ VIRTIO_INPUT_ERROR_BUFFER_ALLOC, n_refill - n_slots);
if (n_slots == 0)
return;
+ }
while (n_slots)
{
@@ -413,7 +419,7 @@ virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
n_rx_bytes);
refill:
- virtio_refill_vring (vm, vif, type, vring, hdr_sz);
+ virtio_refill_vring (vm, vif, type, vring, hdr_sz, node->node_index);
return n_rx_packets;
}
