Adding upstream version 14.2.21.upstream/14.2.21upstream

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

1 files changed, 157 insertions, 0 deletions

diff --git a/src/os/bluestore/BlockDevice.cc b/src/os/bluestore/BlockDevice.cc
new file mode 100644
index 00000000..edfc2fb9
--- /dev/null
+++ b/src/os/bluestore/BlockDevice.cc
@@ -0,0 +1,157 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+  *
+ * Copyright (C) 2015 XSky <haomai@xsky.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include <libgen.h>
+#include <unistd.h>
+
+#include "BlockDevice.h"
+
+#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
+#include "KernelDevice.h"
+#endif
+
+#if defined(HAVE_SPDK)
+#include "NVMEDevice.h"
+#endif
+
+#if defined(HAVE_PMEM)
+#include "PMEMDevice.h"
+#include "libpmem.h"
+#endif
+
+#include "common/debug.h"
+#include "common/EventTrace.h"
+#include "common/errno.h"
+#include "include/compat.h"
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_bdev
+#undef dout_prefix
+#define dout_prefix *_dout << "bdev "
+
+void IOContext::aio_wait()
+{
+  std::unique_lock l(lock);
+  // see _aio_thread for waker logic
+  while (num_running.load() > 0) {
+    dout(10) << __func__ << " " << this
+	     << " waiting for " << num_running.load() << " aios to complete"
+	     << dendl;
+    cond.wait(l);
+  }
+  dout(20) << __func__ << " " << this << " done" << dendl;
+}
+
+uint64_t IOContext::get_num_ios() const
+{
+  // this is about the simplest model for transaction cost you can
+  // imagine.  there is some fixed overhead cost by saying there is a
+  // minimum of one "io".  and then we have some cost per "io" that is
+  // a configurable (with different hdd and ssd defaults), and add
+  // that to the bytes value.
+  uint64_t ios = 0;
+#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
+  ios += pending_aios.size();
+#endif
+#ifdef HAVE_SPDK
+  ios += total_nseg;
+#endif
+  return ios;
+}
+
+void IOContext::release_running_aios()
+{
+  ceph_assert(!num_running);
+#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
+  // release aio contexts (including pinned buffers).
+  running_aios.clear();
+#endif
+}
+
+BlockDevice *BlockDevice::create(CephContext* cct, const string& path,
+				 aio_callback_t cb, void *cbpriv, aio_callback_t d_cb, void *d_cbpriv)
+{
+  string type = "kernel";
+  char buf[PATH_MAX + 1];
+  int r = ::readlink(path.c_str(), buf, sizeof(buf) - 1);
+  if (r >= 0) {
+    buf[r] = '\0';
+    char *bname = ::basename(buf);
+    if (strncmp(bname, SPDK_PREFIX, sizeof(SPDK_PREFIX)-1) == 0)
+      type = "ust-nvme";
+  }
+
+#if defined(HAVE_PMEM)
+  if (type == "kernel") {
+    int is_pmem = 0;
+    size_t map_len = 0;
+    void *addr = pmem_map_file(path.c_str(), 0, PMEM_FILE_EXCL, O_RDONLY, &map_len, &is_pmem);
+    if (addr != NULL) {
+      if (is_pmem)
+	type = "pmem";
+      else
+	dout(1) << path.c_str() << " isn't pmem file" << dendl;
+      pmem_unmap(addr, map_len);
+    } else {
+      dout(1) << "pmem_map_file:" << path.c_str() << " failed." << pmem_errormsg() << dendl;
+    }
+  }
+#endif
+
+  dout(1) << __func__ << " path " << path << " type " << type << dendl;
+
+#if defined(HAVE_PMEM)
+  if (type == "pmem") {
+    return new PMEMDevice(cct, cb, cbpriv);
+  }
+#endif
+#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
+  if (type == "kernel") {
+    return new KernelDevice(cct, cb, cbpriv, d_cb, d_cbpriv);
+  }
+#endif
+#if defined(HAVE_SPDK)
+  if (type == "ust-nvme") {
+    return new NVMEDevice(cct, cb, cbpriv);
+  }
+#endif
+
+
+  derr << __func__ << " unknown backend " << type << dendl;
+  ceph_abort();
+  return NULL;
+}
+
+void BlockDevice::queue_reap_ioc(IOContext *ioc)
+{
+  std::lock_guard l(ioc_reap_lock);
+  if (ioc_reap_count.load() == 0)
+    ++ioc_reap_count;
+  ioc_reap_queue.push_back(ioc);
+}
+
+void BlockDevice::reap_ioc()
+{
+  if (ioc_reap_count.load()) {
+    std::lock_guard l(ioc_reap_lock);
+    for (auto p : ioc_reap_queue) {
+      dout(20) << __func__ << " reap ioc " << p << dendl;
+      delete p;
+    }
+    ioc_reap_queue.clear();
+    --ioc_reap_count;
+  }
+}