initial code repo
[stor4nfv.git] / src / ceph / src / libcephfs.cc
diff --git a/src/ceph/src/libcephfs.cc b/src/ceph/src/libcephfs.cc
new file mode 100644 (file)
index 0000000..74652da
--- /dev/null
@@ -0,0 +1,1780 @@
+// -*- 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) 2009-2011 New Dream Network
+ *
+ * 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 <fcntl.h>
+#include <iostream>
+#include <string.h>
+#include <string>
+
+#include "auth/Crypto.h"
+#include "client/Client.h"
+#include "librados/RadosClient.h"
+#include "common/Mutex.h"
+#include "common/ceph_argparse.h"
+#include "common/common_init.h"
+#include "common/config.h"
+#include "common/version.h"
+#include "mon/MonClient.h"
+#include "include/str_list.h"
+#include "messages/MMonMap.h"
+#include "msg/Messenger.h"
+#include "include/assert.h"
+
+#include "include/cephfs/libcephfs.h"
+
+
+struct ceph_mount_info
+{
+public:
+  explicit ceph_mount_info(CephContext *cct_)
+    : default_perms(),
+      mounted(false),
+      inited(false),
+      client(NULL),
+      monclient(NULL),
+      messenger(NULL),
+      cct(cct_)
+  {
+    if (cct_ != nullptr) {
+      cct->get();
+    }
+  }
+
+  ~ceph_mount_info()
+  {
+    try {
+      shutdown();
+      if (cct) {
+       cct->put();
+       cct = NULL;
+      }
+    }
+    catch (const std::exception& e) {
+      // we shouldn't get here, but if we do, we want to know about it.
+      lderr(cct) << "ceph_mount_info::~ceph_mount_info: caught exception: "
+                << e.what() << dendl;
+    }
+    catch (...) {
+      // ignore
+    }
+  }
+
+  int init()
+  {
+    common_init_finish(cct);
+
+    int ret;
+
+    //monmap
+    monclient = new MonClient(cct);
+    ret = -CEPHFS_ERROR_MON_MAP_BUILD; //defined in libcephfs.h;
+    if (monclient->build_initial_monmap() < 0)
+      goto fail;
+
+    //network connection
+    messenger = Messenger::create_client_messenger(cct, "client");
+
+    //at last the client
+    ret = -CEPHFS_ERROR_NEW_CLIENT; //defined in libcephfs.h;
+    client = new StandaloneClient(messenger, monclient);
+    if (!client)
+      goto fail;
+
+    ret = -CEPHFS_ERROR_MESSENGER_START; //defined in libcephfs.h;
+    if (messenger->start() != 0)
+      goto fail;
+
+    ret = client->init();
+    if (ret)
+      goto fail;
+
+    default_perms = Client::pick_my_perms(cct);
+    inited = true;
+    return 0;
+
+    fail:
+    shutdown();
+    return ret;
+  }
+
+  int mount(const std::string &mount_root, const UserPerm& perms)
+  {
+    int ret;
+    
+    if (mounted)
+      return -EISCONN;
+
+    if (!inited) {
+      ret = init();
+      if (ret != 0) {
+        return ret;
+      }
+    }
+
+    ret = client->mount(mount_root, perms);
+    if (ret) {
+      shutdown();
+      return ret;
+    } else {
+      mounted = true;
+      return 0;
+    }
+  }
+
+  int unmount()
+  {
+    if (!mounted)
+      return -ENOTCONN;
+    shutdown();
+    return 0;
+  }
+
+  void shutdown()
+  {
+    if (mounted) {
+      client->unmount();
+      mounted = false;
+    }
+    if (inited) {
+      client->shutdown();
+      inited = false;
+    }
+    if (messenger) {
+      messenger->shutdown();
+      messenger->wait();
+      delete messenger;
+      messenger = NULL;
+    }
+    if (monclient) {
+      delete monclient;
+      monclient = NULL;
+    }
+    if (client) {
+      delete client;
+      client = NULL;
+    }
+  }
+
+  bool is_initialized() const
+  {
+    return inited;
+  }
+
+  bool is_mounted()
+  {
+    return mounted;
+  }
+
+  int conf_read_file(const char *path_list)
+  {
+    int ret = cct->_conf->parse_config_files(path_list, NULL, 0);
+    if (ret)
+      return ret;
+    cct->_conf->apply_changes(NULL);
+    cct->_conf->complain_about_parse_errors(cct);
+    return 0;
+  }
+
+  int conf_parse_argv(int argc, const char **argv)
+  {
+    int ret;
+    vector<const char*> args;
+    argv_to_vec(argc, argv, args);
+    ret = cct->_conf->parse_argv(args);
+    if (ret)
+       return ret;
+    cct->_conf->apply_changes(NULL);
+    return 0;
+  }
+
+  int conf_parse_env(const char *name)
+  {
+    md_config_t *conf = cct->_conf;
+    vector<const char*> args;
+    env_to_vec(args, name);
+    int ret = conf->parse_argv(args);
+    if (ret)
+      return ret;
+    conf->apply_changes(NULL);
+    return 0;
+  }
+
+  int conf_set(const char *option, const char *value)
+  {
+    int ret = cct->_conf->set_val(option, value);
+    if (ret)
+      return ret;
+    cct->_conf->apply_changes(NULL);
+    return 0;
+  }
+
+  int conf_get(const char *option, char *buf, size_t len)
+  {
+    char *tmp = buf;
+    return cct->_conf->get_val(option, &tmp, len);
+  }
+
+  Client *get_client()
+  {
+    return client;
+  }
+
+  const char *get_cwd(const UserPerm& perms)
+  {
+    client->getcwd(cwd, perms);
+    return cwd.c_str();
+  }
+
+  int chdir(const char *to, const UserPerm& perms)
+  {
+    return client->chdir(to, cwd, perms);
+  }
+
+  CephContext *get_ceph_context() const {
+    return cct;
+  }
+
+  UserPerm default_perms;
+private:
+  bool mounted;
+  bool inited;
+  StandaloneClient *client;
+  MonClient *monclient;
+  Messenger *messenger;
+  CephContext *cct;
+  std::string cwd;
+};
+
+static void do_out_buffer(bufferlist& outbl, char **outbuf, size_t *outbuflen)
+{
+  if (outbuf) {
+    if (outbl.length() > 0) {
+      *outbuf = (char *)malloc(outbl.length());
+      memcpy(*outbuf, outbl.c_str(), outbl.length());
+    } else {
+      *outbuf = NULL;
+    }
+  }
+  if (outbuflen)
+    *outbuflen = outbl.length();
+}
+
+static void do_out_buffer(string& outbl, char **outbuf, size_t *outbuflen)
+{
+  if (outbuf) {
+    if (outbl.length() > 0) {
+      *outbuf = (char *)malloc(outbl.length());
+      memcpy(*outbuf, outbl.c_str(), outbl.length());
+    } else {
+      *outbuf = NULL;
+    }
+  }
+  if (outbuflen)
+    *outbuflen = outbl.length();
+}
+
+extern "C" UserPerm *ceph_userperm_new(uid_t uid, gid_t gid, int ngids,
+                                      gid_t *gidlist)
+{
+  return new (std::nothrow) UserPerm(uid, gid, ngids, gidlist);
+}
+
+extern "C" void ceph_userperm_destroy(UserPerm *perm)
+{
+  delete perm;
+}
+
+extern "C" const char *ceph_version(int *pmajor, int *pminor, int *ppatch)
+{
+  int major, minor, patch;
+  const char *v = ceph_version_to_str();
+
+  int n = sscanf(v, "%d.%d.%d", &major, &minor, &patch);
+  if (pmajor)
+    *pmajor = (n >= 1) ? major : 0;
+  if (pminor)
+    *pminor = (n >= 2) ? minor : 0;
+  if (ppatch)
+    *ppatch = (n >= 3) ? patch : 0;
+  return VERSION;
+}
+
+extern "C" int ceph_create_with_context(struct ceph_mount_info **cmount, CephContext *cct)
+{
+  *cmount = new struct ceph_mount_info(cct);
+  return 0;
+}
+
+extern "C" int ceph_create_from_rados(struct ceph_mount_info **cmount,
+    rados_t cluster)
+{
+  auto rados = (librados::RadosClient *) cluster;
+  auto cct = rados->cct;
+  return ceph_create_with_context(cmount, cct);
+}
+
+extern "C" int ceph_create(struct ceph_mount_info **cmount, const char * const id)
+{
+  CephInitParameters iparams(CEPH_ENTITY_TYPE_CLIENT);
+  if (id) {
+    iparams.name.set(CEPH_ENTITY_TYPE_CLIENT, id);
+  }
+
+  CephContext *cct = common_preinit(iparams, CODE_ENVIRONMENT_LIBRARY, 0);
+  cct->_conf->parse_env(); // environment variables coverride
+  cct->_conf->apply_changes(NULL);
+  int ret = ceph_create_with_context(cmount, cct);
+  cct->put();
+  return ret;
+}
+
+extern "C" int ceph_unmount(struct ceph_mount_info *cmount)
+{
+  return cmount->unmount();
+}
+
+extern "C" int ceph_release(struct ceph_mount_info *cmount)
+{
+  if (cmount->is_mounted())
+    return -EISCONN;
+  delete cmount;
+  return 0;
+}
+
+extern "C" void ceph_shutdown(struct ceph_mount_info *cmount)
+{
+  cmount->shutdown();
+  delete cmount;
+}
+
+extern "C" int ceph_conf_read_file(struct ceph_mount_info *cmount, const char *path)
+{
+  return cmount->conf_read_file(path);
+}
+
+extern "C" int ceph_conf_parse_argv(struct ceph_mount_info *cmount, int argc,
+                                    const char **argv)
+{
+  return cmount->conf_parse_argv(argc, argv);
+}
+
+extern "C" int ceph_conf_parse_env(struct ceph_mount_info *cmount, const char *name)
+{
+  return cmount->conf_parse_env(name);
+}
+
+extern "C" int ceph_conf_set(struct ceph_mount_info *cmount, const char *option,
+                            const char *value)
+{
+  return cmount->conf_set(option, value);
+}
+
+extern "C" int ceph_conf_get(struct ceph_mount_info *cmount, const char *option,
+                            char *buf, size_t len)
+{
+  if (buf == NULL) {
+    return -EINVAL;
+  }
+  return cmount->conf_get(option, buf, len);
+}
+
+extern "C" int ceph_mds_command(struct ceph_mount_info *cmount,
+    const char *mds_spec,
+    const char **cmd,
+    size_t cmdlen,
+    const char *inbuf, size_t inbuflen,
+    char **outbuf, size_t *outbuflen,
+    char **outsbuf, size_t *outsbuflen)
+{
+  bufferlist inbl;
+  bufferlist outbl;
+  std::vector<string> cmdv;
+  std::string outs;
+
+  if (!cmount->is_initialized()) {
+    return -ENOTCONN;
+  }
+
+  // Construct inputs
+  for (size_t i = 0; i < cmdlen; ++i) {
+    cmdv.push_back(cmd[i]);
+  }
+  inbl.append(inbuf, inbuflen);
+
+  // Issue remote command
+  C_SaferCond cond;
+  int r = cmount->get_client()->mds_command(
+      mds_spec,
+      cmdv, inbl,
+      &outbl, &outs,
+      &cond);
+
+  if (r != 0) {
+    goto out;
+  }
+
+  // Wait for completion
+  r = cond.wait();
+
+  // Construct outputs
+  do_out_buffer(outbl, outbuf, outbuflen);
+  do_out_buffer(outs, outsbuf, outsbuflen);
+
+out:
+  return r;
+}
+
+extern "C" int ceph_init(struct ceph_mount_info *cmount)
+{
+  return cmount->init();
+}
+
+extern "C" int ceph_mount(struct ceph_mount_info *cmount, const char *root)
+{
+  std::string mount_root;
+  if (root)
+    mount_root = root;
+  return cmount->mount(mount_root, cmount->default_perms);
+}
+
+extern "C" int ceph_is_mounted(struct ceph_mount_info *cmount)
+{
+  return cmount->is_mounted() ? 1 : 0;
+}
+
+extern "C" struct UserPerm *ceph_mount_perms(struct ceph_mount_info *cmount)
+{
+  return &cmount->default_perms;
+}
+
+extern "C" int ceph_statfs(struct ceph_mount_info *cmount, const char *path,
+                          struct statvfs *stbuf)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->statfs(path, stbuf, cmount->default_perms);
+}
+
+extern "C" int ceph_get_local_osd(struct ceph_mount_info *cmount)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->get_local_osd();
+}
+
+extern "C" const char* ceph_getcwd(struct ceph_mount_info *cmount)
+{
+  return cmount->get_cwd(cmount->default_perms);
+}
+
+extern "C" int ceph_chdir (struct ceph_mount_info *cmount, const char *s)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->chdir(s, cmount->default_perms);
+}
+
+extern "C" int ceph_opendir(struct ceph_mount_info *cmount,
+                           const char *name, struct ceph_dir_result **dirpp)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->opendir(name, (dir_result_t **)dirpp, cmount->default_perms);
+}
+
+extern "C" int ceph_closedir(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->closedir(reinterpret_cast<dir_result_t*>(dirp));
+}
+
+extern "C" struct dirent * ceph_readdir(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp)
+{
+  if (!cmount->is_mounted()) {
+    /* Client::readdir also sets errno to signal errors. */
+    errno = ENOTCONN;
+    return NULL;
+  }
+  return cmount->get_client()->readdir(reinterpret_cast<dir_result_t*>(dirp));
+}
+
+extern "C" int ceph_readdir_r(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp, struct dirent *de)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->readdir_r(reinterpret_cast<dir_result_t*>(dirp), de);
+}
+
+extern "C" int ceph_readdirplus_r(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp,
+                                 struct dirent *de, struct ceph_statx *stx, unsigned want,
+                                 unsigned flags, struct Inode **out)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return cmount->get_client()->readdirplus_r(reinterpret_cast<dir_result_t*>(dirp), de, stx, want, flags, out);
+}
+
+extern "C" int ceph_getdents(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp,
+                            char *buf, int buflen)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->getdents(reinterpret_cast<dir_result_t*>(dirp), buf, buflen);
+}
+
+extern "C" int ceph_getdnames(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp,
+                             char *buf, int buflen)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->getdnames(reinterpret_cast<dir_result_t*>(dirp), buf, buflen);
+}
+
+extern "C" void ceph_rewinddir(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp)
+{
+  if (!cmount->is_mounted())
+    return;
+  cmount->get_client()->rewinddir(reinterpret_cast<dir_result_t*>(dirp));
+}
+
+extern "C" int64_t ceph_telldir(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->telldir(reinterpret_cast<dir_result_t*>(dirp));
+}
+
+extern "C" void ceph_seekdir(struct ceph_mount_info *cmount, struct ceph_dir_result *dirp, int64_t offset)
+{
+  if (!cmount->is_mounted())
+    return;
+  cmount->get_client()->seekdir(reinterpret_cast<dir_result_t*>(dirp), offset);
+}
+
+extern "C" int ceph_link (struct ceph_mount_info *cmount, const char *existing,
+                         const char *newname)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->link(existing, newname, cmount->default_perms);
+}
+
+extern "C" int ceph_unlink(struct ceph_mount_info *cmount, const char *path)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->unlink(path, cmount->default_perms);
+}
+
+extern "C" int ceph_rename(struct ceph_mount_info *cmount, const char *from,
+                          const char *to)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->rename(from, to, cmount->default_perms);
+}
+
+// dirs
+extern "C" int ceph_mkdir(struct ceph_mount_info *cmount, const char *path, mode_t mode)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->mkdir(path, mode, cmount->default_perms);
+}
+
+extern "C" int ceph_mkdirs(struct ceph_mount_info *cmount, const char *path, mode_t mode)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->mkdirs(path, mode, cmount->default_perms);
+}
+
+extern "C" int ceph_rmdir(struct ceph_mount_info *cmount, const char *path)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->rmdir(path, cmount->default_perms);
+}
+
+// symlinks
+extern "C" int ceph_readlink(struct ceph_mount_info *cmount, const char *path,
+                            char *buf, int64_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->readlink(path, buf, size, cmount->default_perms);
+}
+
+extern "C" int ceph_symlink(struct ceph_mount_info *cmount, const char *existing,
+                           const char *newname)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->symlink(existing, newname, cmount->default_perms);
+}
+
+extern "C" int ceph_fstatx(struct ceph_mount_info *cmount, int fd, struct ceph_statx *stx,
+                            unsigned int want, unsigned int flags)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return cmount->get_client()->fstatx(fd, stx, cmount->default_perms,
+                                      want, flags);
+}
+
+extern "C" int ceph_statx(struct ceph_mount_info *cmount, const char *path,
+                         struct ceph_statx *stx, unsigned int want, unsigned int flags)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return cmount->get_client()->statx(path, stx, cmount->default_perms,
+                                    want, flags);
+}
+
+extern "C" int ceph_fsetattrx(struct ceph_mount_info *cmount, int fd,
+                             struct ceph_statx *stx, int mask)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fsetattrx(fd, stx, mask, cmount->default_perms);
+}
+
+extern "C" int ceph_setattrx(struct ceph_mount_info *cmount, const char *relpath,
+                           struct ceph_statx *stx, int mask, int flags)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return cmount->get_client()->setattrx(relpath, stx, mask,
+                                       cmount->default_perms, flags);
+}
+
+// *xattr() calls supporting samba/vfs
+extern "C" int ceph_getxattr(struct ceph_mount_info *cmount, const char *path, const char *name, void *value, size_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+
+  return cmount->get_client()->getxattr(path, name, value, size, cmount->default_perms);
+}
+
+extern "C" int ceph_lgetxattr(struct ceph_mount_info *cmount, const char *path, const char *name, void *value, size_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->lgetxattr(path, name, value, size, cmount->default_perms);
+}
+
+extern "C" int ceph_fgetxattr(struct ceph_mount_info *cmount, int fd, const char *name, void *value, size_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fgetxattr(fd, name, value, size, cmount->default_perms);
+}
+
+
+extern "C" int ceph_listxattr(struct ceph_mount_info *cmount, const char *path, char *list, size_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->listxattr(path, list, size, cmount->default_perms);
+}
+
+extern "C" int ceph_llistxattr(struct ceph_mount_info *cmount, const char *path, char *list, size_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->llistxattr(path, list, size, cmount->default_perms);
+}
+
+extern "C" int ceph_flistxattr(struct ceph_mount_info *cmount, int fd, char *list, size_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->flistxattr(fd, list, size, cmount->default_perms);
+}
+
+extern "C" int ceph_removexattr(struct ceph_mount_info *cmount, const char *path, const char *name)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->removexattr(path, name, cmount->default_perms);
+}
+
+extern "C" int ceph_lremovexattr(struct ceph_mount_info *cmount, const char *path, const char *name)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->lremovexattr(path, name, cmount->default_perms);
+}
+
+extern "C" int ceph_fremovexattr(struct ceph_mount_info *cmount, int fd, const char *name)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fremovexattr(fd, name, cmount->default_perms);
+}
+
+extern "C" int ceph_setxattr(struct ceph_mount_info *cmount, const char *path, const char *name, const void *value, size_t size, int flags)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->setxattr(path, name, value, size, flags, cmount->default_perms);
+}
+
+extern "C" int ceph_lsetxattr(struct ceph_mount_info *cmount, const char *path, const char *name, const void *value, size_t size, int flags)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->lsetxattr(path, name, value, size, flags, cmount->default_perms);
+}
+
+extern "C" int ceph_fsetxattr(struct ceph_mount_info *cmount, int fd, const char *name, const void *value, size_t size, int flags)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fsetxattr(fd, name, value, size, flags, cmount->default_perms);
+}
+/* end xattr support */
+
+extern "C" int ceph_chmod(struct ceph_mount_info *cmount, const char *path, mode_t mode)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->chmod(path, mode, cmount->default_perms);
+}
+extern "C" int ceph_fchmod(struct ceph_mount_info *cmount, int fd, mode_t mode)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fchmod(fd, mode, cmount->default_perms);
+}
+extern "C" int ceph_chown(struct ceph_mount_info *cmount, const char *path,
+                         int uid, int gid)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->chown(path, uid, gid, cmount->default_perms);
+}
+extern "C" int ceph_fchown(struct ceph_mount_info *cmount, int fd,
+                          int uid, int gid)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fchown(fd, uid, gid, cmount->default_perms);
+}
+extern "C" int ceph_lchown(struct ceph_mount_info *cmount, const char *path,
+                          int uid, int gid)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->lchown(path, uid, gid, cmount->default_perms);
+}
+
+
+extern "C" int ceph_utime(struct ceph_mount_info *cmount, const char *path,
+                         struct utimbuf *buf)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->utime(path, buf, cmount->default_perms);
+}
+
+extern "C" int ceph_flock(struct ceph_mount_info *cmount, int fd, int operation,
+                         uint64_t owner)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->flock(fd, operation, owner);
+}
+
+extern "C" int ceph_truncate(struct ceph_mount_info *cmount, const char *path,
+                            int64_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->truncate(path, size, cmount->default_perms);
+}
+
+// file ops
+extern "C" int ceph_mknod(struct ceph_mount_info *cmount, const char *path,
+                         mode_t mode, dev_t rdev)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->mknod(path, mode, cmount->default_perms, rdev);
+}
+
+extern "C" int ceph_open(struct ceph_mount_info *cmount, const char *path,
+                        int flags, mode_t mode)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->open(path, flags, cmount->default_perms, mode);
+}
+
+extern "C" int ceph_open_layout(struct ceph_mount_info *cmount, const char *path, int flags,
+    mode_t mode, int stripe_unit, int stripe_count, int object_size, const char *data_pool)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->open(path, flags, cmount->default_perms, mode,
+                                   stripe_unit, stripe_count,
+                                   object_size, data_pool);
+}
+
+extern "C" int ceph_close(struct ceph_mount_info *cmount, int fd)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->close(fd);
+}
+
+extern "C" int64_t ceph_lseek(struct ceph_mount_info *cmount, int fd,
+                            int64_t offset, int whence)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->lseek(fd, offset, whence);
+}
+
+extern "C" int ceph_read(struct ceph_mount_info *cmount, int fd, char *buf,
+                        int64_t size, int64_t offset)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->read(fd, buf, size, offset);
+}
+
+extern "C" int ceph_preadv(struct ceph_mount_info *cmount, int fd,
+              const struct iovec *iov, int iovcnt, int64_t offset)
+{
+  if (!cmount->is_mounted())
+      return -ENOTCONN;
+  return cmount->get_client()->preadv(fd, iov, iovcnt, offset);
+}
+
+extern "C" int ceph_write(struct ceph_mount_info *cmount, int fd, const char *buf,
+                         int64_t size, int64_t offset)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->write(fd, buf, size, offset);
+}
+
+extern "C" int ceph_pwritev(struct ceph_mount_info *cmount, int fd,
+              const struct iovec *iov, int iovcnt, int64_t offset)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->pwritev(fd, iov, iovcnt, offset);
+}
+
+extern "C" int ceph_ftruncate(struct ceph_mount_info *cmount, int fd, int64_t size)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->ftruncate(fd, size, cmount->default_perms);
+}
+
+extern "C" int ceph_fsync(struct ceph_mount_info *cmount, int fd, int syncdataonly)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fsync(fd, syncdataonly);
+}
+
+extern "C" int ceph_fallocate(struct ceph_mount_info *cmount, int fd, int mode,
+                             int64_t offset, int64_t length)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->fallocate(fd, mode, offset, length);
+}
+
+extern "C" int ceph_sync_fs(struct ceph_mount_info *cmount)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->sync_fs();
+}
+
+
+extern "C" int ceph_get_file_stripe_unit(struct ceph_mount_info *cmount, int fh)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  return l.stripe_unit;
+}
+
+extern "C" int ceph_get_path_stripe_unit(struct ceph_mount_info *cmount, const char *path)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  return l.stripe_unit;
+}
+
+extern "C" int ceph_get_file_stripe_count(struct ceph_mount_info *cmount, int fh)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  return l.stripe_count;
+}
+
+extern "C" int ceph_get_path_stripe_count(struct ceph_mount_info *cmount, const char *path)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  return l.stripe_count;
+}
+
+extern "C" int ceph_get_file_object_size(struct ceph_mount_info *cmount, int fh)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  return l.object_size;
+}
+
+extern "C" int ceph_get_path_object_size(struct ceph_mount_info *cmount, const char *path)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  return l.object_size;
+}
+
+extern "C" int ceph_get_file_pool(struct ceph_mount_info *cmount, int fh)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  return l.pool_id;
+}
+
+extern "C" int ceph_get_path_pool(struct ceph_mount_info *cmount, const char *path)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  return l.pool_id;
+}
+
+extern "C" int ceph_get_file_pool_name(struct ceph_mount_info *cmount, int fh, char *buf, size_t len)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  string name = cmount->get_client()->get_pool_name(l.pool_id);
+  if (len == 0)
+    return name.length();
+  if (name.length() > len)
+    return -ERANGE;
+  strncpy(buf, name.c_str(), len);
+  return name.length();
+}
+
+extern "C" int ceph_get_pool_name(struct ceph_mount_info *cmount, int pool, char *buf, size_t len)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  string name = cmount->get_client()->get_pool_name(pool);
+  if (len == 0)
+    return name.length();
+  if (name.length() > len)
+    return -ERANGE;
+  strncpy(buf, name.c_str(), len);
+  return name.length();
+}
+
+extern "C" int ceph_get_path_pool_name(struct ceph_mount_info *cmount, const char *path, char *buf, size_t len)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  string name = cmount->get_client()->get_pool_name(l.pool_id);
+  if (len == 0)
+    return name.length();
+  if (name.length() > len)
+    return -ERANGE;
+  strncpy(buf, name.c_str(), len);
+  return name.length();
+}
+
+extern "C" int ceph_get_default_data_pool_name(struct ceph_mount_info *cmount, char *buf, size_t len)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  int64_t pool_id = cmount->get_client()->get_default_pool_id();
+  string name = cmount->get_client()->get_pool_name(pool_id);
+  if (len == 0)
+    return name.length();
+  if (name.length() > len)
+    return -ERANGE;
+  strncpy(buf, name.c_str(), len);
+  return name.length(); 
+}
+
+extern "C" int ceph_get_file_layout(struct ceph_mount_info *cmount, int fh, int *stripe_unit, int *stripe_count, int *object_size, int *pg_pool)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  if (stripe_unit)
+    *stripe_unit = l.stripe_unit;
+  if (stripe_count)
+    *stripe_count = l.stripe_count;
+  if (object_size)
+    *object_size = l.object_size;
+  if (pg_pool)
+    *pg_pool = l.pool_id;
+  return 0;
+}
+
+extern "C" int ceph_get_path_layout(struct ceph_mount_info *cmount, const char *path, int *stripe_unit, int *stripe_count, int *object_size, int *pg_pool)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  if (stripe_unit)
+    *stripe_unit = l.stripe_unit;
+  if (stripe_count)
+    *stripe_count = l.stripe_count;
+  if (object_size)
+    *object_size = l.object_size;
+  if (pg_pool)
+    *pg_pool = l.pool_id;
+  return 0;
+}
+
+extern "C" int ceph_get_file_replication(struct ceph_mount_info *cmount, int fh)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->fdescribe_layout(fh, &l);
+  if (r < 0)
+    return r;
+  int rep = cmount->get_client()->get_pool_replication(l.pool_id);
+  return rep;
+}
+
+extern "C" int ceph_get_path_replication(struct ceph_mount_info *cmount, const char *path)
+{
+  file_layout_t l;
+  int r;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  r = cmount->get_client()->describe_layout(path, &l, cmount->default_perms);
+  if (r < 0)
+    return r;
+  int rep = cmount->get_client()->get_pool_replication(l.pool_id);
+  return rep;
+}
+
+extern "C" int ceph_set_default_file_stripe_unit(struct ceph_mount_info *cmount,
+                                                int stripe)
+{
+  // this option no longer exists
+  return -EOPNOTSUPP;
+}
+
+extern "C" int ceph_set_default_file_stripe_count(struct ceph_mount_info *cmount,
+                                                 int count)
+{
+  // this option no longer exists
+  return -EOPNOTSUPP;
+}
+
+extern "C" int ceph_set_default_object_size(struct ceph_mount_info *cmount, int size)
+{
+  // this option no longer exists
+  return -EOPNOTSUPP;
+}
+
+extern "C" int ceph_set_default_file_replication(struct ceph_mount_info *cmount,
+                                                int replication)
+{
+  // this option no longer exists
+  return -EOPNOTSUPP;
+}
+
+extern "C" int ceph_set_default_preferred_pg(struct ceph_mount_info *cmount, int osd)
+{
+  // this option no longer exists
+  return -EOPNOTSUPP;
+}
+
+extern "C" int ceph_get_file_extent_osds(struct ceph_mount_info *cmount, int fh,
+    int64_t offset, int64_t *length, int *osds, int nosds)
+{
+  if (nosds < 0)
+    return -EINVAL;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+
+  vector<int> vosds;
+  int ret = cmount->get_client()->get_file_extent_osds(fh, offset, length, vosds);
+  if (ret < 0)
+    return ret;
+
+  if (!nosds)
+    return vosds.size();
+
+  if ((int)vosds.size() > nosds)
+    return -ERANGE;
+
+  for (int i = 0; i < (int)vosds.size(); i++)
+    osds[i] = vosds[i];
+
+  return vosds.size();
+}
+
+extern "C" int ceph_get_osd_crush_location(struct ceph_mount_info *cmount,
+    int osd, char *path, size_t len)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+
+  if (!path && len)
+    return -EINVAL;
+
+  vector<pair<string, string> > loc;
+  int ret = cmount->get_client()->get_osd_crush_location(osd, loc);
+  if (ret)
+    return ret;
+
+  size_t needed = 0;
+  size_t cur = 0;
+  vector<pair<string, string> >::iterator it;
+  for (it = loc.begin(); it != loc.end(); ++it) {
+    string& type = it->first;
+    string& name = it->second;
+    needed += type.size() + name.size() + 2;
+    if (needed <= len) {
+      if (path)
+       strcpy(path + cur, type.c_str());
+      cur += type.size() + 1;
+      if (path)
+       strcpy(path + cur, name.c_str());
+      cur += name.size() + 1;
+    }
+  }
+
+  if (len == 0)
+    return needed;
+
+  if (needed > len)
+    return -ERANGE;
+
+  return needed;
+}
+
+extern "C" int ceph_get_osd_addr(struct ceph_mount_info *cmount, int osd,
+    struct sockaddr_storage *addr)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+
+  if (!addr)
+    return -EINVAL;
+
+  entity_addr_t address;
+  int ret = cmount->get_client()->get_osd_addr(osd, address);
+  if (ret < 0)
+    return ret;
+
+  *addr = address.get_sockaddr_storage();
+
+  return 0;
+}
+
+extern "C" int ceph_get_file_stripe_address(struct ceph_mount_info *cmount, int fh,
+                                           int64_t offset, struct sockaddr_storage *addr, int naddr)
+{
+  vector<entity_addr_t> address;
+  unsigned i;
+  int r;
+
+  if (naddr < 0)
+    return -EINVAL;
+
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+
+  r = cmount->get_client()->get_file_stripe_address(fh, offset, address);
+  if (r < 0)
+    return r;
+
+  for (i = 0; i < (unsigned)naddr && i < address.size(); i++)
+    addr[i] = address[i].get_sockaddr_storage();
+
+  /* naddr == 0: drop through and return actual size */
+  if (naddr && (address.size() > (unsigned)naddr))
+    return -ERANGE;
+
+  return address.size();
+}
+
+extern "C" int ceph_localize_reads(struct ceph_mount_info *cmount, int val)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  if (!val)
+    cmount->get_client()->clear_filer_flags(CEPH_OSD_FLAG_LOCALIZE_READS);
+  else
+    cmount->get_client()->set_filer_flags(CEPH_OSD_FLAG_LOCALIZE_READS);
+  return 0;
+}
+
+extern "C" CephContext *ceph_get_mount_context(struct ceph_mount_info *cmount)
+{
+  return cmount->get_ceph_context();
+}
+
+extern "C" int ceph_debug_get_fd_caps(struct ceph_mount_info *cmount, int fd)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->get_caps_issued(fd);
+}
+
+extern "C" int ceph_debug_get_file_caps(struct ceph_mount_info *cmount, const char *path)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->get_caps_issued(path, cmount->default_perms);
+}
+
+extern "C" int ceph_get_stripe_unit_granularity(struct ceph_mount_info *cmount)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return CEPH_MIN_STRIPE_UNIT;
+}
+
+extern "C" int ceph_get_pool_id(struct ceph_mount_info *cmount, const char *pool_name)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+
+  if (!pool_name || !pool_name[0])
+    return -EINVAL;
+
+  /* negative range reserved for errors */
+  int64_t pool_id = cmount->get_client()->get_pool_id(pool_name);
+  if (pool_id > 0x7fffffff)
+    return -ERANGE;
+
+  /* get_pool_id error codes fit in int */
+  return (int)pool_id;
+}
+
+extern "C" int ceph_get_pool_replication(struct ceph_mount_info *cmount,
+                                        int pool_id)
+{
+  if (!cmount->is_mounted())
+    return -ENOTCONN;
+  return cmount->get_client()->get_pool_replication(pool_id);
+}
+/* Low-level exports */
+
+extern "C" int ceph_ll_lookup_root(struct ceph_mount_info *cmount,
+                  Inode **parent)
+{
+  *parent = cmount->get_client()->get_root();
+  if (*parent)
+    return 0;
+  return -EFAULT;
+}
+
+extern "C" struct Inode *ceph_ll_get_inode(class ceph_mount_info *cmount,
+                                          vinodeno_t vino)
+{
+  return (cmount->get_client())->ll_get_inode(vino);
+}
+
+
+/**
+ * Populates the client cache with the requested inode, and its
+ * parent dentry.
+ */
+extern "C" int ceph_ll_lookup_inode(
+    struct ceph_mount_info *cmount,
+    struct inodeno_t ino,
+    Inode **inode)
+{
+  int r = (cmount->get_client())->lookup_ino(ino, cmount->default_perms, inode);
+  if (r) {
+    return r;
+  }
+
+  assert(inode != NULL);
+  assert(*inode != NULL);
+
+  // Request the parent inode, so that we can look up the name
+  Inode *parent;
+  r = (cmount->get_client())->lookup_parent(*inode, cmount->default_perms, &parent);
+  if (r && r != -EINVAL) {
+    // Unexpected error
+    (cmount->get_client())->ll_forget(*inode, 1);
+    return r;
+  } else if (r == -EINVAL) {
+    // EINVAL indicates node without parents (root), drop out now
+    // and don't try to look up the non-existent dentry.
+    return 0;
+  }
+  // FIXME: I don't think this works; lookup_parent() returns 0 if the parent
+  // is already in cache
+  assert(parent != NULL);
+
+  // Finally, get the name (dentry) of the requested inode
+  r = (cmount->get_client())->lookup_name(*inode, parent, cmount->default_perms);
+  if (r) {
+    // Unexpected error
+    (cmount->get_client())->ll_forget(parent, 1);
+    (cmount->get_client())->ll_forget(*inode, 1);
+    return r;
+  }
+
+  (cmount->get_client())->ll_forget(parent, 1);
+  return 0;
+}
+
+extern "C" int ceph_ll_lookup(struct ceph_mount_info *cmount,
+                             Inode *parent, const char *name, Inode **out,
+                             struct ceph_statx *stx, unsigned want,
+                             unsigned flags, const UserPerm *perms)
+{
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return (cmount->get_client())->ll_lookupx(parent, name, out, stx, want,
+                                           flags, *perms);
+}
+
+extern "C" int ceph_ll_put(class ceph_mount_info *cmount, Inode *in)
+{
+  return (cmount->get_client()->ll_put(in));
+}
+
+extern "C" int ceph_ll_forget(class ceph_mount_info *cmount, Inode *in,
+                             int count)
+{
+  return (cmount->get_client()->ll_forget(in, count));
+}
+
+extern "C" int ceph_ll_walk(struct ceph_mount_info *cmount, const char* name, Inode **i,
+                struct ceph_statx *stx, unsigned int want, unsigned int flags,
+                const UserPerm *perms)
+{
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return(cmount->get_client()->ll_walk(name, i, stx, want, flags, *perms));
+}
+
+extern "C" int ceph_ll_getattr(class ceph_mount_info *cmount,
+                              Inode *in, struct ceph_statx *stx,
+                              unsigned int want, unsigned int flags,
+                              const UserPerm *perms)
+{
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return (cmount->get_client()->ll_getattrx(in, stx, want, flags, *perms));
+}
+
+extern "C" int ceph_ll_setattr(class ceph_mount_info *cmount,
+                              Inode *in, struct ceph_statx *stx,
+                              int mask, const UserPerm *perms)
+{
+  return (cmount->get_client()->ll_setattrx(in, stx, mask, *perms));
+}
+
+extern "C" int ceph_ll_open(class ceph_mount_info *cmount, Inode *in,
+                           int flags, Fh **fh, const UserPerm *perms)
+{
+  return (cmount->get_client()->ll_open(in, flags, fh, *perms));
+}
+
+extern "C" int ceph_ll_read(class ceph_mount_info *cmount, Fh* filehandle,
+                           int64_t off, uint64_t len, char* buf)
+{
+  bufferlist bl;
+  int r = 0;
+
+  r = cmount->get_client()->ll_read(filehandle, off, len, &bl);
+  if (r >= 0)
+    {
+      bl.copy(0, bl.length(), buf);
+      r = bl.length();
+    }
+  return r;
+}
+
+extern "C" int ceph_ll_read_block(class ceph_mount_info *cmount,
+                                 Inode *in, uint64_t blockid,
+                                 char* buf, uint64_t offset,
+                                 uint64_t length,
+                                 struct ceph_file_layout* layout)
+{
+  file_layout_t l;
+  int r = (cmount->get_client()->ll_read_block(in, blockid, buf, offset,
+                                              length, &l));
+  l.to_legacy(layout);
+  return r;
+}
+
+extern "C" int ceph_ll_write_block(class ceph_mount_info *cmount,
+                                  Inode *in, uint64_t blockid,
+                                  char *buf, uint64_t offset,
+                                  uint64_t length,
+                                  struct ceph_file_layout *layout,
+                                  uint64_t snapseq, uint32_t sync)
+{
+  file_layout_t l;
+  int r = (cmount->get_client()->ll_write_block(in, blockid, buf, offset,
+                                               length, &l, snapseq, sync));
+  l.to_legacy(layout);
+  return r;
+}
+
+extern "C" int ceph_ll_commit_blocks(class ceph_mount_info *cmount,
+                                    Inode *in, uint64_t offset,
+                                    uint64_t range)
+{
+  return (cmount->get_client()->ll_commit_blocks(in, offset, range));
+}
+
+extern "C" int ceph_ll_fsync(class ceph_mount_info *cmount,
+                            Fh *fh, int syncdataonly)
+{
+  return (cmount->get_client()->ll_fsync(fh, syncdataonly));
+}
+
+extern "C" off_t ceph_ll_lseek(class ceph_mount_info *cmount,
+                               Fh *fh, off_t offset, int whence)
+{
+  return (cmount->get_client()->ll_lseek(fh, offset, whence));
+}
+
+extern "C" int ceph_ll_write(class ceph_mount_info *cmount,
+                            Fh *fh, int64_t off, uint64_t len,
+                            const char *data)
+{
+  return (cmount->get_client()->ll_write(fh, off, len, data));
+}
+
+extern "C" int64_t ceph_ll_readv(class ceph_mount_info *cmount,
+                                struct Fh *fh, const struct iovec *iov,
+                                int iovcnt, int64_t off)
+{
+  return -1; // TODO:  implement
+}
+
+extern "C" int64_t ceph_ll_writev(class ceph_mount_info *cmount,
+                                 struct Fh *fh, const struct iovec *iov,
+                                 int iovcnt, int64_t off)
+{
+  return -1; // TODO:  implement
+}
+
+extern "C" int ceph_ll_close(class ceph_mount_info *cmount, Fh* fh)
+{
+  return (cmount->get_client()->ll_release(fh));
+}
+
+extern "C" int ceph_ll_create(class ceph_mount_info *cmount,
+                             Inode *parent, const char *name, mode_t mode,
+                             int oflags, Inode **outp, Fh **fhp,
+                             struct ceph_statx *stx, unsigned want,
+                             unsigned lflags, const UserPerm *perms)
+{
+  if (lflags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return (cmount->get_client())->ll_createx(parent, name, mode, oflags, outp,
+                                           fhp, stx, want, lflags, *perms);
+}
+
+extern "C" int ceph_ll_mknod(class ceph_mount_info *cmount, Inode *parent,
+                            const char *name, mode_t mode, dev_t rdev,
+                            Inode **out, struct ceph_statx *stx,
+                            unsigned want, unsigned flags,
+                            const UserPerm *perms)
+{
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return (cmount->get_client())->ll_mknodx(parent, name, mode, rdev,
+                                          out, stx, want, flags, *perms);
+}
+
+extern "C" int ceph_ll_mkdir(class ceph_mount_info *cmount, Inode *parent,
+                            const char *name, mode_t mode, Inode **out,
+                            struct ceph_statx *stx, unsigned want,
+                            unsigned flags, const UserPerm *perms)
+{
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return cmount->get_client()->ll_mkdirx(parent, name, mode, out, stx, want,
+                                        flags, *perms);
+}
+
+extern "C" int ceph_ll_link(class ceph_mount_info *cmount,
+                           Inode *in, Inode *newparent,
+                           const char *name, const UserPerm *perms)
+{
+  return cmount->get_client()->ll_link(in, newparent, name, *perms);
+}
+
+extern "C" int ceph_ll_opendir(class ceph_mount_info *cmount,
+                              Inode *in,
+                              struct ceph_dir_result **dirpp,
+                              const UserPerm *perms)
+{
+  return (cmount->get_client()->ll_opendir(in, O_RDONLY, (dir_result_t**) dirpp,
+                                          *perms));
+}
+
+extern "C" int ceph_ll_releasedir(class ceph_mount_info *cmount,
+                                 ceph_dir_result *dir)
+{
+  (void) cmount->get_client()->ll_releasedir(reinterpret_cast<dir_result_t*>(dir));
+  return (0);
+}
+
+extern "C" int ceph_ll_rename(class ceph_mount_info *cmount,
+                             Inode *parent, const char *name,
+                             Inode *newparent, const char *newname,
+                             const UserPerm *perms)
+{
+  return cmount->get_client()->ll_rename(parent, name, newparent,
+                                        newname, *perms);
+}
+
+extern "C" int ceph_ll_unlink(class ceph_mount_info *cmount, Inode *in,
+                             const char *name, const UserPerm *perms)
+{
+  return cmount->get_client()->ll_unlink(in, name, *perms);
+}
+
+extern "C" int ceph_ll_statfs(class ceph_mount_info *cmount,
+                             Inode *in, struct statvfs *stbuf)
+{
+  return (cmount->get_client()->ll_statfs(in, stbuf, cmount->default_perms));
+}
+
+extern "C" int ceph_ll_readlink(class ceph_mount_info *cmount, Inode *in,
+                               char *buf, size_t bufsiz,
+                               const UserPerm *perms)
+{
+  return cmount->get_client()->ll_readlink(in, buf, bufsiz, *perms);
+}
+
+extern "C" int ceph_ll_symlink(class ceph_mount_info *cmount,
+                              Inode *in, const char *name,
+                              const char *value, Inode **out,
+                              struct ceph_statx *stx, unsigned want,
+                              unsigned flags, const UserPerm *perms)
+{
+  if (flags & ~CEPH_REQ_FLAG_MASK)
+    return -EINVAL;
+  return (cmount->get_client()->ll_symlinkx(in, name, value, out, stx, want,
+                                           flags, *perms));
+}
+
+extern "C" int ceph_ll_rmdir(class ceph_mount_info *cmount,
+                            Inode *in, const char *name,
+                            const UserPerm *perms)
+{
+  return cmount->get_client()->ll_rmdir(in, name, *perms);
+}
+
+extern "C" int ceph_ll_getxattr(class ceph_mount_info *cmount,
+                               Inode *in, const char *name, void *value,
+                               size_t size, const UserPerm *perms)
+{
+  return (cmount->get_client()->ll_getxattr(in, name, value, size, *perms));
+}
+
+extern "C" int ceph_ll_listxattr(struct ceph_mount_info *cmount,
+                              Inode *in, char *list,
+                              size_t buf_size, size_t *list_size,
+                             const UserPerm *perms)
+{
+  int res = cmount->get_client()->ll_listxattr(in, list, buf_size, *perms);
+  if (res >= 0) {
+    *list_size = (size_t)res;
+    return 0;
+  }
+  return res;
+}
+
+extern "C" int ceph_ll_setxattr(class ceph_mount_info *cmount,
+                               Inode *in, const char *name,
+                               const void *value, size_t size,
+                               int flags, const UserPerm *perms)
+{
+  return (cmount->get_client()->ll_setxattr(in, name, value, size, flags, *perms));
+}
+
+extern "C" int ceph_ll_removexattr(class ceph_mount_info *cmount,
+                                  Inode *in, const char *name,
+                                  const UserPerm *perms)
+{
+  return (cmount->get_client()->ll_removexattr(in, name, *perms));
+}
+
+extern "C" int ceph_ll_getlk(struct ceph_mount_info *cmount,
+                            Fh *fh, struct flock *fl, uint64_t owner)
+{
+  return (cmount->get_client()->ll_getlk(fh, fl, owner));
+}
+
+extern "C" int ceph_ll_setlk(struct ceph_mount_info *cmount,
+                            Fh *fh, struct flock *fl, uint64_t owner,
+                            int sleep)
+{
+  return (cmount->get_client()->ll_setlk(fh, fl, owner, sleep));
+}
+
+extern "C" uint32_t ceph_ll_stripe_unit(class ceph_mount_info *cmount,
+                                       Inode *in)
+{
+  return (cmount->get_client()->ll_stripe_unit(in));
+}
+
+extern "C" uint32_t ceph_ll_file_layout(class ceph_mount_info *cmount,
+                                       Inode *in,
+                                       struct ceph_file_layout *layout)
+{
+  file_layout_t l;
+  int r = (cmount->get_client()->ll_file_layout(in, &l));
+  l.to_legacy(layout);
+  return r;
+}
+
+uint64_t ceph_ll_snap_seq(class ceph_mount_info *cmount, Inode *in)
+{
+  return (cmount->get_client()->ll_snap_seq(in));
+}
+
+extern "C" int ceph_ll_get_stripe_osd(class ceph_mount_info *cmount,
+                                     Inode *in, uint64_t blockno,
+                                     struct ceph_file_layout* layout)
+{
+  file_layout_t l;
+  int r = (cmount->get_client()->ll_get_stripe_osd(in, blockno, &l));
+  l.to_legacy(layout);
+  return r;
+}
+
+extern "C" int ceph_ll_num_osds(class ceph_mount_info *cmount)
+{
+  return (cmount->get_client()->ll_num_osds());
+}
+
+extern "C" int ceph_ll_osdaddr(class ceph_mount_info *cmount,
+                              int osd, uint32_t *addr)
+{
+  return (cmount->get_client()->ll_osdaddr(osd, addr));
+}
+
+extern "C" uint64_t ceph_ll_get_internal_offset(class ceph_mount_info *cmount,
+                                               Inode *in,
+                                               uint64_t blockno)
+{
+  return (cmount->get_client()->ll_get_internal_offset(in, blockno));
+}
+
+extern "C" void ceph_buffer_free(char *buf)
+{
+  if (buf) {
+    free(buf);
+  }
+}