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-rw-r--r--src/vlib/buffer_funcs.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/vlib/buffer_funcs.h b/src/vlib/buffer_funcs.h
index 07f270c8c23..7103227a965 100644
--- a/src/vlib/buffer_funcs.h
+++ b/src/vlib/buffer_funcs.h
@@ -158,6 +158,24 @@ vlib_buffer_copy_indices_from_ring (u32 * dst, u32 * ring, u32 start,
}
}
+always_inline void
+vlib_buffer_copy_indices_to_ring (u32 * ring, u32 * src, u32 start,
+ u32 ring_size, u32 n_buffers)
+{
+ ASSERT (n_buffers <= ring_size);
+
+ if (PREDICT_TRUE (start + n_buffers <= ring_size))
+ {
+ vlib_buffer_copy_indices (ring + start, src, n_buffers);
+ }
+ else
+ {
+ u32 n = ring_size - start;
+ vlib_buffer_copy_indices (ring + start, src, n);
+ vlib_buffer_copy_indices (ring, src + n, n_buffers - n);
+ }
+}
+
STATIC_ASSERT_OFFSET_OF (vlib_buffer_t, template_end, 64);
static_always_inline void
vlib_buffer_copy_template (vlib_buffer_t * b, vlib_buffer_t * bt)