Method add_update_inode

src/client/Client.cc:1090–1272

}

Inode * Client::add_update_inode(InodeStat *st, utime_t from,
				 MetaSession *session,
				 const UserPerm& request_perms)
{
  Inode *in;
  bool was_new = false;
  auto [it, b] = inode_map.try_emplace(st->vino);
  ldout(cct, 25) << __func__ << ": " << *st << dendl;
  if (!b) {
    in = it->second;
    ldout(cct, 12) << __func__ << " had " << *in << " caps " << ccap_string(st->cap.caps) << dendl;
  } else {
    in = new Inode(this, st->vino, &st->layout);
    it->second = in;

    if (use_faked_inos())
      _assign_faked_ino(in);

    if (!root) {
      root = in;
      if (use_faked_inos())
        _assign_faked_root(root.get());
      root_ancestor = in;
      cwd = root;
    } else if (is_mounting()) {
      root_parents[root_ancestor] = in;
      root_ancestor = in;
    }

    // immutable bits
    in->ino = st->vino.ino;
    in->snapid = st->vino.snapid;
    in->mode = st->mode & S_IFMT;
    was_new = true;
  }

  in->rdev = st->rdev;
  if (in->is_symlink())
    in->symlink = st->symlink;

  in->optmetadata = st->optmetadata; // TODO maybe prune unknown_md_t

  // only update inode if mds info is strictly newer, or it is the same and projected (odd).
  bool new_version = false;
  if (in->version == 0 ||
      ((st->cap.flags & CEPH_CAP_FLAG_AUTH) &&
       (in->version & ~1) < st->version))
    new_version = true;

  int issued;
  in->caps_issued(&issued);
  issued |= in->caps_dirty();
  int new_issued = ~issued & (int)st->cap.caps;

  bool need_snapdir_attr_refresh = false;
  if ((new_version || (new_issued & CEPH_CAP_AUTH_SHARED)) &&
      !(issued & CEPH_CAP_AUTH_EXCL)) {
    in->mode = st->mode;