fsal_unlink.c

Go to the documentation of this file.

/*
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * Copyright (C) 2010 The Linux Box, Inc.
 * Contributor : Adam C. Emerson <aemerson@linuxbox.com>
 *
 * Portions copyright CEA/DAM/DIF  (2008)
 * contributeur : Philippe DENIEL   philippe.deniel@cea.fr
 *                Thomas LEIBOVICI  thomas.leibovici@cea.fr
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * -------------
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "fsal.h"
#include "fsal_internal.h"
#include "fsal_convert.h"

fsal_status_t CEPHFSAL_unlink(fsal_handle_t * extparent,
                              fsal_name_t * name,
                              fsal_op_context_t * extcontext,
                              fsal_attrib_list_t * parentdir_attributes)
{
  int rc;
  struct stat st;
  fsal_status_t status;
  char strname[FSAL_MAX_NAME_LEN];
  cephfsal_handle_t* parent = (cephfsal_handle_t*) extparent;
  cephfsal_op_context_t* context = (cephfsal_op_context_t*) extcontext;
  struct ceph_mount_info *cmount = context->export_context->cmount;
  int uid = FSAL_OP_CONTEXT_TO_UID(context);
  int gid = FSAL_OP_CONTEXT_TO_GID(context);

  /* sanity checks.
   * note : parentdir_attributes are optional.
   *        parentdir_handle is mandatory,
   *        because, we do not allow to delete FS root !
   */

  if(!parent || !context || !name)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_unlink);

  if(parentdir_attributes)
    {
      status = CEPHFSAL_getattrs(extparent, extcontext,
                                 parentdir_attributes);

      if(FSAL_IS_ERROR(status))
        {
          FSAL_CLEAR_MASK(parentdir_attributes->asked_attributes);
          FSAL_SET_MASK(parentdir_attributes->asked_attributes,
                        FSAL_ATTR_RDATTR_ERR);
        }
    }

  FSAL_name2str(name, strname, FSAL_MAX_NAME_LEN);

  TakeTokenFSCall();
  rc = ceph_ll_lookup(cmount, VINODE(parent), strname, &st, uid, gid);
  ReleaseTokenFSCall();

  if (rc < 0)
    Return(posix2fsal_error(rc), 0, INDEX_FSAL_unlink);

  if(S_ISDIR(st.st_mode))
      rc = ceph_ll_rmdir(cmount, VINODE(parent), strname, uid, gid);
  else
      rc = ceph_ll_unlink(cmount, VINODE(parent), strname, uid, gid);

  if (rc < 0)
    Return(posix2fsal_error(rc), 0, INDEX_FSAL_unlink);

  /* OK */
  Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_unlink);

}