Adding upstream version 18.2.2.upstream/18.2.2

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

1 files changed, 378 insertions, 0 deletions

diff --git a/src/blk/pmem/PMEMDevice.cc b/src/blk/pmem/PMEMDevice.cc
new file mode 100644
index 000000000..728c79a19
--- /dev/null
+++ b/src/blk/pmem/PMEMDevice.cc
@@ -0,0 +1,378 @@
+// -*- 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 Intel <jianpeng.ma@intel.com>
+ *
+ * Author: Jianpeng Ma <jianpeng.ma@intel.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 <unistd.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <filesystem>
+#include <fstream>
+
+#include <fmt/format.h>
+
+#include "PMEMDevice.h"
+#include "libpmem.h"
+#include "include/types.h"
+#include "include/compat.h"
+#include "include/stringify.h"
+#include "common/errno.h"
+#include "common/debug.h"
+#include "common/blkdev.h"
+
+#if defined(HAVE_LIBDML)
+#include <dml/dml.hpp>
+using execution_path = dml::automatic;
+#endif
+
+#define dout_context cct
+#define dout_subsys ceph_subsys_bdev
+#undef dout_prefix
+#define dout_prefix *_dout << "bdev-PMEM("  << path << ") "
+
+PMEMDevice::PMEMDevice(CephContext *cct, aio_callback_t cb, void *cbpriv)
+  : BlockDevice(cct, cb, cbpriv),
+    fd(-1), addr(0),
+    injecting_crash(0)
+{
+}
+
+int PMEMDevice::_lock()
+{
+  struct flock l;
+  memset(&l, 0, sizeof(l));
+  l.l_type = F_WRLCK;
+  l.l_whence = SEEK_SET;
+  l.l_start = 0;
+  l.l_len = 0;
+  int r = ::fcntl(fd, F_SETLK, &l);
+  if (r < 0)
+    return -errno;
+  return 0;
+}
+
+static int pmem_check_file_type(int fd, const char *pmem_file, uint64_t *total_size)
+{
+  namespace fs = std::filesystem;
+  if (!fs::is_character_file(pmem_file)) {
+    return -EINVAL;
+  }
+  struct stat file_stat;
+  if (::fstat(fd, &file_stat)) {
+    return -EINVAL;
+  }
+  fs::path char_dir = fmt::format("/sys/dev/char/{}:{}",
+				  major(file_stat.st_rdev),
+				  minor(file_stat.st_rdev));
+  // Need to check if it is a DAX device
+  if (auto subsys_path = char_dir / "subsystem";
+      fs::read_symlink(subsys_path).filename().string() != "dax") {
+    return -EINVAL;
+  }
+  if (total_size == nullptr) {
+    return 0;
+  }
+  if (std::ifstream size_file(char_dir / "size"); size_file) {
+    size_file >> *total_size;
+    return size_file ? 0 : -EINVAL;
+  } else {
+    return -EINVAL;
+  }
+}
+
+int PMEMDevice::open(const std::string& p)
+{
+  path = p;
+  int r = 0;
+  dout(1) << __func__ << " path " << path << dendl;
+
+  fd = ::open(path.c_str(), O_RDWR | O_CLOEXEC);
+  if (fd < 0) {
+    r = -errno;
+    derr << __func__ << " open got: " << cpp_strerror(r) << dendl;
+    return r;
+  }
+
+  r = pmem_check_file_type(fd, path.c_str(), &size);
+  if (!r) {
+    dout(1) << __func__ << " This path " << path << " is a devdax dev " << dendl;
+    devdax_device = true;
+    // If using devdax char device, set it to not rotational device.
+    rotational = false;
+  }
+
+  r = _lock();
+  if (r < 0) {
+    derr << __func__ << " failed to lock " << path << ": " << cpp_strerror(r)
+	 << dendl;
+    goto out_fail;
+  }
+
+  struct stat st;
+  r = ::fstat(fd, &st);
+  if (r < 0) {
+    r = -errno;
+    derr << __func__ << " fstat got " << cpp_strerror(r) << dendl;
+    goto out_fail;
+  }
+
+  size_t map_len;
+  addr = (char *)pmem_map_file(path.c_str(), 0,
+                               devdax_device ? 0: PMEM_FILE_EXCL, O_RDWR,
+			       &map_len, NULL);
+  if (addr == NULL) {
+    derr << __func__ << " pmem_map_file failed: " << pmem_errormsg() << dendl;
+    goto out_fail;
+  }
+  size = map_len;
+
+  // Operate as though the block size is 4 KB.  The backing file
+  // blksize doesn't strictly matter except that some file systems may
+  // require a read/modify/write if we write something smaller than
+  // it.
+  block_size = g_conf()->bdev_block_size;
+  if (block_size != (unsigned)st.st_blksize) {
+    dout(1) << __func__ << " backing device/file reports st_blksize "
+      << st.st_blksize << ", using bdev_block_size "
+      << block_size << " anyway" << dendl;
+  }
+
+  dout(1) << __func__
+    << " size " << size
+    << " (" << byte_u_t(size) << ")"
+    << " block_size " << block_size
+    << " (" << byte_u_t(block_size) << ")"
+    << dendl;
+  return 0;
+
+ out_fail:
+  VOID_TEMP_FAILURE_RETRY(::close(fd));
+  fd = -1;
+  return r;
+}
+
+void PMEMDevice::close()
+{
+  dout(1) << __func__ << dendl;
+
+  ceph_assert(addr != NULL);
+  if (devdax_device) {
+    devdax_device = false;
+  }
+  pmem_unmap(addr, size);
+
+  ceph_assert(fd >= 0);
+  VOID_TEMP_FAILURE_RETRY(::close(fd));
+  fd = -1;
+
+  path.clear();
+}
+
+int PMEMDevice::collect_metadata(const std::string& prefix, std::map<std::string,std::string> *pm) const
+{
+  (*pm)[prefix + "rotational"] = stringify((int)(bool)rotational);
+  (*pm)[prefix + "size"] = stringify(get_size());
+  (*pm)[prefix + "block_size"] = stringify(get_block_size());
+  (*pm)[prefix + "driver"] = "PMEMDevice";
+  (*pm)[prefix + "type"] = "ssd";
+
+  struct stat st;
+  int r = ::fstat(fd, &st);
+  if (r < 0)
+    return -errno;
+  if (S_ISBLK(st.st_mode)) {
+    (*pm)[prefix + "access_mode"] = "blk";
+    char buffer[1024] = {0};
+    BlkDev blkdev(fd);
+
+    blkdev.model(buffer, sizeof(buffer));
+    (*pm)[prefix + "model"] = buffer;
+
+    buffer[0] = '\0';
+    blkdev.dev(buffer, sizeof(buffer));
+    (*pm)[prefix + "dev"] = buffer;
+
+    // nvme exposes a serial number
+    buffer[0] = '\0';
+    blkdev.serial(buffer, sizeof(buffer));
+    (*pm)[prefix + "serial"] = buffer;
+
+  } else if (S_ISCHR(st.st_mode)) {
+    (*pm)[prefix + "access_mode"] = "chardevice";
+    (*pm)[prefix + "path"] = path;
+
+  } else {
+    (*pm)[prefix + "access_mode"] = "file";
+    (*pm)[prefix + "path"] = path;
+  }
+  return 0;
+}
+
+bool PMEMDevice::support(const std::string &path)
+{
+  int is_pmem = 0;
+  size_t map_len = 0;
+  int r = 0;
+  int local_fd;
+
+  local_fd = ::open(path.c_str(), O_RDWR);
+  if (local_fd < 0) {
+    return false;
+  }
+
+  r = pmem_check_file_type(local_fd, path.c_str(), NULL);
+  VOID_TEMP_FAILURE_RETRY(::close(local_fd));
+  int flags = PMEM_FILE_EXCL;
+  if (r == 0) {
+    flags = 0;
+  }
+
+  void *addr = pmem_map_file(path.c_str(), 0, flags, O_RDONLY, &map_len, &is_pmem);
+  if (addr != NULL) {
+    pmem_unmap(addr, map_len);
+    if (is_pmem) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+int PMEMDevice::flush()
+{
+  //Because all write is persist. So no need
+  return 0;
+}
+
+
+void PMEMDevice::aio_submit(IOContext *ioc)
+{
+  if (ioc->priv) {
+    ceph_assert(ioc->num_running == 0);
+    aio_callback(aio_callback_priv, ioc->priv);
+  } else {
+    ioc->try_aio_wake();
+  }
+  return;
+}
+
+int PMEMDevice::write(uint64_t off, bufferlist& bl, bool buffered, int write_hint)
+{
+  uint64_t len = bl.length();
+  dout(20) << __func__ << " " << off << "~" << len  << dendl;
+  ceph_assert(is_valid_io(off, len));
+
+  dout(40) << "data:\n";
+  bl.hexdump(*_dout);
+  *_dout << dendl;
+
+  if (g_conf()->bdev_inject_crash &&
+      rand() % g_conf()->bdev_inject_crash == 0) {
+    derr << __func__ << " bdev_inject_crash: dropping io " << off << "~" << len
+      << dendl;
+    ++injecting_crash;
+    return 0;
+  }
+
+  bufferlist::iterator p = bl.begin();
+  uint64_t off1 = off;
+  while (len) {
+    const char *data;
+    uint32_t l = p.get_ptr_and_advance(len, &data);
+
+#if defined(HAVE_LIBDML)
+    // Take care of the persistency issue
+    auto result = dml::execute<execution_path>(dml::mem_move, dml::make_view(data, l), dml::make_view(addr + off1, l));
+    ceph_assert(result.status == dml::status_code::ok);
+#else
+    pmem_memcpy_persist(addr + off1, data, l);
+#endif
+    len -= l;
+    off1 += l;
+  }
+  return 0;
+}
+
+int PMEMDevice::aio_write(
+  uint64_t off,
+  bufferlist &bl,
+  IOContext *ioc,
+  bool buffered,
+  int write_hint)
+{
+  return write(off, bl, buffered);
+}
+
+
+int PMEMDevice::read(uint64_t off, uint64_t len, bufferlist *pbl,
+		      IOContext *ioc,
+		      bool buffered)
+{
+  dout(5) << __func__ << " " << off << "~" << len  << dendl;
+  ceph_assert(is_valid_io(off, len));
+
+  bufferptr p = buffer::create_small_page_aligned(len);
+
+#if defined(HAVE_LIBDML)
+  auto result = dml::execute<execution_path>(dml::mem_move, dml::make_view(addr + off, len), dml::make_view(p.c_str(), len));
+  ceph_assert(result.status == dml::status_code::ok);
+#else
+  memcpy(p.c_str(), addr + off, len);
+#endif
+
+  pbl->clear();
+  pbl->push_back(std::move(p));
+
+  dout(40) << "data:\n";
+  pbl->hexdump(*_dout);
+  *_dout << dendl;
+
+  return 0;
+}
+
+int PMEMDevice::aio_read(uint64_t off, uint64_t len, bufferlist *pbl,
+		      IOContext *ioc)
+{
+  return read(off, len, pbl, ioc, false);
+}
+
+int PMEMDevice::read_random(uint64_t off, uint64_t len, char *buf, bool buffered)
+{
+  dout(5) << __func__ << " " << off << "~" << len << dendl;
+  ceph_assert(is_valid_io(off, len));
+
+
+#if defined(HAVE_LIBDML)
+  auto result = dml::execute<execution_path>(dml::mem_move, dml::make_view(addr + off, len), dml::make_view(buf, len));
+  ceph_assert(result.status == dml::status_code::ok);
+#else
+  memcpy(buf, addr + off, len);
+#endif
+  return 0;
+}
+
+
+int PMEMDevice::invalidate_cache(uint64_t off, uint64_t len)
+{
+  dout(5) << __func__ << " " << off << "~" << len << dendl;
+  return 0;
+}
+
+