fsal_attrs.c

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/*
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * Copyright (C) 2010, The Linux Box Corporation
 * Contributor : Adam C. Emerson <aemerson@linuxbox.com>
 *
 * Some 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_getattrs(fsal_handle_t * exthandle,
                                fsal_op_context_t * extcontext,
                                fsal_attrib_list_t * object_attributes)
{
  int rc;
  struct stat st;
  fsal_status_t status;
  cephfsal_handle_t* filehandle = (cephfsal_handle_t*) exthandle;
  cephfsal_op_context_t* context = (cephfsal_op_context_t*) extcontext;
  int uid = FSAL_OP_CONTEXT_TO_UID(context);
  int gid = FSAL_OP_CONTEXT_TO_GID(context);

  /* sanity checks.
   * note : object_attributes is mandatory in FSAL_getattrs.
   */
  if(!filehandle || !context || !object_attributes)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_getattrs);

  TakeTokenFSCall();

  rc = ceph_ll_getattr(context->export_context->cmount, VINODE(filehandle),
                       &st, uid, gid);

  ReleaseTokenFSCall();

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

  /* convert attributes */
  status = posix2fsal_attributes(&st, object_attributes);
  if(FSAL_IS_ERROR(status))
    {
      FSAL_CLEAR_MASK(object_attributes->asked_attributes);
      FSAL_SET_MASK(object_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
      Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getattrs);
    }

  Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_getattrs);
}

fsal_status_t CEPHFSAL_setattrs(fsal_handle_t * exthandle,
                                fsal_op_context_t * extcontext,
                                fsal_attrib_list_t * attrib_set,
                                fsal_attrib_list_t * object_attributes)
{
  cephfsal_handle_t* filehandle = (cephfsal_handle_t*) exthandle;
  cephfsal_op_context_t* context = (cephfsal_op_context_t*) extcontext;
  struct stat st;
  fsal_attrib_list_t attrs;
  int rc, mask=0;
  int uid = FSAL_OP_CONTEXT_TO_UID(context);
  int gid = FSAL_OP_CONTEXT_TO_GID(context);

  /* sanity checks.
   * note : object_attributes is optional.
   */
  if(!filehandle || !context || !attrib_set)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_setattrs);

  /* local copy of attributes */
  attrs = *attrib_set;

  /* First, check that FSAL attributes changes are allowed. */

  /* Is it allowed to change times ? */

  if(!global_fs_info.cansettime)
    {
      if(attrs.asked_attributes &
         (FSAL_ATTR_ATIME |
          FSAL_ATTR_CREATION |
          FSAL_ATTR_CTIME |
          FSAL_ATTR_MTIME))
        {

          /* handled as an unsettable attribute. */
          Return(ERR_FSAL_INVAL, 0, INDEX_FSAL_setattrs);
        }

    }

  /* apply umask, if mode attribute is to be changed */

  if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MODE))
    {
      attrs.mode &= (~global_fs_info.umask);
    }

  /* Build flags and struct stat */

  if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MODE))
    {
      mask |= CEPH_SETATTR_MODE;
      st.st_mode = fsal2unix_mode(attrs.mode);
    }
  if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_OWNER))
    {
      mask |= CEPH_SETATTR_UID;
      st.st_uid = attrs.owner;
    }
  if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_GROUP))
    {
      mask |= CEPH_SETATTR_UID;
      st.st_gid = attrs.group;
    }
  if(FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_ATIME))
    {
      mask |= CEPH_SETATTR_ATIME;
      st.st_atime = attrs.atime.seconds;
    }
  if (FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_MTIME))
    {
      mask |= CEPH_SETATTR_MTIME;
      st.st_mtime = attrs.mtime.seconds;
    }
  if (FSAL_TEST_MASK(attrs.asked_attributes, FSAL_ATTR_CTIME))
    {
      mask |= CEPH_SETATTR_CTIME;
      st.st_ctime = attrs.ctime.seconds;
    }

  TakeTokenFSCall();

  rc = ceph_ll_setattr(context->export_context->cmount, VINODE(filehandle),
                       &st, mask, uid, gid);

  ReleaseTokenFSCall();

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

  if(object_attributes)
    {
      fsal_status_t status;
      status = CEPHFSAL_getattrs(exthandle, extcontext, object_attributes);

      /* on error, we set a special bit in the mask. */
      if(FSAL_IS_ERROR(status))
        {
          FSAL_CLEAR_MASK(object_attributes->asked_attributes);
          FSAL_SET_MASK(object_attributes->asked_attributes,
                        FSAL_ATTR_RDATTR_ERR);
        }

    }

  Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_setattrs);
}

fsal_status_t CEPHFSAL_getextattrs(fsal_handle_t * p_filehandle,
                                   fsal_op_context_t * p_context,
                                   fsal_extattrib_list_t * p_object_attributes)
{
  Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_getextattrs);
} /* CEPHFSAL_getextattrs */