Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/src/os/bluestore/FreelistManager.cc b/src/os/bluestore/FreelistManager.cc
new file mode 100644
index 000000000..69866fa40
--- /dev/null
+++ b/src/os/bluestore/FreelistManager.cc
@@ -0,0 +1,53 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "FreelistManager.h"
+#include "BitmapFreelistManager.h"
+#ifdef HAVE_LIBZBD
+#include "ZonedFreelistManager.h"
+#endif
+
+FreelistManager *FreelistManager::create(
+  CephContext* cct,
+  std::string type,
+  std::string prefix)
+{
+  // a bit of a hack... we hard-code the prefixes here.  we need to
+  // put the freelistmanagers in different prefixes because the merge
+  // op is per prefix, has to done pre-db-open, and we don't know the
+  // freelist type until after we open the db.
+  ceph_assert(prefix == "B");
+  if (type == "bitmap") {
+    return new BitmapFreelistManager(cct, "B", "b");
+  }
+  if (type == "null") {
+    // use BitmapFreelistManager with the null option to stop allocations from going to RocksDB
+    auto *fm = new BitmapFreelistManager(cct, "B", "b");
+    fm->set_null_manager();
+    return fm;
+  }
+
+#ifdef HAVE_LIBZBD
+  // With zoned drives there is only one FreelistManager implementation that we
+  // can use, and we also know if a drive is zoned right after opening it
+  // (BlueStore::_open_bdev).  Hence, we set freelist_type to "zoned" whenever
+  // we open the device and it turns out to be is zoned.  We ignore |prefix|
+  // passed to create and use the prefixes defined for zoned devices at the top
+  // of BlueStore.cc.
+  if (type == "zoned")
+    return new ZonedFreelistManager(cct, "Z", "z");
+#endif
+
+  return NULL;
+}
+
+void FreelistManager::setup_merge_operators(KeyValueDB *db,
+					    const std::string& type)
+{
+#ifdef HAVE_LIBZBD
+  if (type == "zoned")
+    ZonedFreelistManager::setup_merge_operator(db, "z");
+  else
+#endif
+    BitmapFreelistManager::setup_merge_operator(db, "b");
+}