KernelDevice: use standard errno for better tracing

Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>

diff --git a/src/os/bluestore/KernelDevice.cc b/src/os/bluestore/KernelDevice.cc
index 160800b8d0bff8be45e10d4f48f49522bf2be3f0..c0391a7750958d1bb1c86d8cd58c3f703e83aab0 100644 (file)
--- a/src/os/bluestore/KernelDevice.cc
+++ b/src/os/bluestore/KernelDevice.cc
@@ -401,6 +401,7 @@ int KernelDevice::aio_write(
     int r = ::pwritev(buffered ? fd_buffered : fd_direct,
                      &iov[0], iov.size(), off);
     if (r < 0) {
+      r = -errno;
       derr << __func__ << " pwritev error: " << cpp_strerror(r) << dendl;
       return r;
     }