From: Adam Crume <adamcrume@gmail.com>
Date: Thu, 31 Jul 2014 19:21:35 +0000 (-0700)
Subject: rbd-replay: Use non-zero fake data
X-Git-Tag: v0.86~231^2~35
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=0d8222251273b9ca7e2a508e1d19d17aaf8eb5c4;p=ceph.git

rbd-replay: Use non-zero fake data

Signed-off-by: Adam Crume <adamcrume@gmail.com>
---

diff --git a/src/rbd_replay/actions.cc b/src/rbd_replay/actions.cc
index 0ac7801365c0..d48ccef3d8d0 100644
--- a/src/rbd_replay/actions.cc
+++ b/src/rbd_replay/actions.cc
@@ -232,11 +232,25 @@ Action::ptr AioWriteAction::read_from(Action &src, Deser &d) {
   return Action::ptr(new AioWriteAction(src, imagectx_id, offset, length));
 }
 
+static std::string create_fake_data() {
+  char data[1 << 20]; // 1 MB
+  for (unsigned int i = 0; i < sizeof(data); i++) {
+    data[i] = (char) i;
+  }
+  return std::string(data, sizeof(data));
+}
+
 void AioWriteAction::perform(ActionCtx &worker) {
+  static const std::string fake_data(create_fake_data());
   dout(ACTION_LEVEL) << "Performing " << *this << dendl;
   librbd::Image *image = worker.get_image(m_imagectx_id);
   PendingIO::ptr io(new PendingIO(pending_io_id(), worker));
-  io->bufferlist().append_zero(m_length);
+  uint64_t remaining = m_length;
+  while (remaining > 0) {
+    uint64_t n = std::min(remaining, fake_data.length());
+    io->bufferlist().append(fake_data.data(), n);
+    remaining -= n;
+  }
   worker.add_pending(io);
   if (worker.readonly()) {
     worker.remove_pending(io);