new file mode 100644
--- /dev/null
+++ b/src/os/unix/ngx_aio_read_chain.c
@@ -0,0 +1,78 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_event.h>
+#include <ngx_aio.h>
+
+
+ssize_t ngx_aio_read_chain(ngx_connection_t *c, ngx_chain_t *cl)
+{
+    int           n;
+    u_char       *buf, *prev;
+    size_t        size;
+    ssize_t       total;
+    ngx_err_t     err;
+
+    if (c->read->pending_eof) {
+        c->read->ready = 0;
+        return 0;
+    }
+
+    total = 0;
+
+    while (cl) {
+
+        /* we can post the single aio operation only */
+
+        if (!c->read->ready) {
+            return total ? total : NGX_AGAIN;
+        }
+
+        buf = cl->buf->last;
+        prev = cl->buf->last;
+        size = 0;
+
+        /* coalesce the neighbouring bufs */
+
+        while (cl && prev == cl->buf->last) {
+            size += cl->buf->end - cl->buf->last;
+            prev = cl->buf->end;
+            cl = cl->next;
+        }
+
+        n = ngx_aio_read(c, buf, size);
+
+        ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0, "aio_read: %d", n);
+
+        if (n == NGX_AGAIN) {
+            return total ? total : NGX_AGAIN;
+        }
+
+        if (n == NGX_ERROR) {
+            return NGX_ERROR;
+        }
+
+        if (n == 0) {
+            c->read->pending_eof = 1;
+            if (total) {
+                c->read->eof = 0;
+                c->read->ready = 1;
+            }
+            return total;
+        }
+
+        if (n > 0) {
+            total += n;
+        }
+
+        ngx_log_debug1(NGX_LOG_DEBUG_EVENT, c->log, 0,
+                       "aio_read total: %d", total);
+    }
+
+    return total ? total : NGX_AGAIN;
+}