Method _unlink

src/client/Client.cc:16362–16402

}

int Client::_unlink(Inode *dir, const char *name, const UserPerm& perm)
{
  ldout(cct, 8) << "_unlink(" << dir->ino << " " << name
		<< " uid " << perm.uid() << " gid " << perm.gid()
		<< ")" << dendl;

  walk_dentry_result wdr;
  if (int rc = path_walk(dir, filepath(name), &wdr, perm, {.followsym = false}); rc < 0) {
    return rc;
  }

  if (should_check_perms()) {
    if (int rc = may_delete(wdr, perm); rc < 0) {
      return rc;
    }
  }

  if (wdr.diri->snapid != CEPH_NOSNAP) {
    return -EROFS;
  }

  MetaRequest *req = new MetaRequest(CEPH_MDS_OP_UNLINK);

  req->set_filepath(wdr.getpath());
  req->set_dentry(wdr.dn);
  req->dentry_drop = CEPH_CAP_FILE_SHARED;
  req->dentry_unless = CEPH_CAP_FILE_EXCL;

  auto& in = wdr.target;
  req->set_other_inode(in);
  in->break_all_delegs();
  req->other_inode_drop = CEPH_CAP_LINK_SHARED | CEPH_CAP_LINK_EXCL;

  req->set_inode(wdr.diri);

  int res = make_request(req, perm);

  trim_cache();
  ldout(cct, 8) << "unlink(" << wdr.getpath() << ") = " << res << dendl;
  return res;
}

int Client::ll_unlink(Inode *in, const char *name, const UserPerm& perm)
{