fsal_symlinks.c

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/*
 * vim:expandtab:shiftwidth=8:tabstop=8:
 */

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

#include "fsal.h"
#include "fsal_internal.h"
#include "fsal_convert.h"
#include "fsal_common.h"
#include <string.h>

fsal_status_t FSAL_readlink(fsal_handle_t * linkhandle, /* IN */
                            fsal_op_context_t * p_context,      /* IN */
                            fsal_path_t * p_link_content,       /* OUT */
                            fsal_attrib_list_t * link_attributes        /* [ IN/OUT ] */
    )
{

  int rc;
  fsal_status_t st;
  char link_content_out[FSAL_MAX_PATH_LEN];

  /* sanity checks.
   * note : link_attributes is optional.
   */
  if(!linkhandle || !p_context || !p_link_content)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_readlink);

  TakeTokenFSCall();

  /* >> call your filesystem readlink function << */

  ReleaseTokenFSCall();

  /* >> convert error code and return on error << */

  /* >> convert fs output to fsal_path_t
   * for example, if this is a char * (link_content_out) :
   */

  st = FSAL_str2path(link_content_out, FSAL_MAX_PATH_LEN, p_link_content);

  if(FSAL_IS_ERROR(st))
    Return(st.major, st.minor, INDEX_FSAL_readlink);

  /* retrieves object attributes, if asked */

  if(link_attributes)
    {

      fsal_status_t status;

      status = FSAL_getattrs(linkhandle, p_context, link_attributes);

      /* On error, we set a flag in the returned attributes */

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

    }

  Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_readlink);

}

fsal_status_t FSAL_symlink(fsal_handle_t * parent_directory_handle,     /* IN */
                           fsal_name_t * p_linkname,    /* IN */
                           fsal_path_t * p_linkcontent, /* IN */
                           fsal_op_context_t * p_context,       /* IN */
                           fsal_accessmode_t accessmode,        /* IN (ignored) */
                           fsal_handle_t * link_handle, /* OUT */
                           fsal_attrib_list_t * link_attributes /* [ IN/OUT ] */
    )
{

  int rc;

  /* sanity checks.
   * note : link_attributes is optional.
   */
  if(!parent_directory_handle ||
     !p_context || !link_handle || !p_linkname || !p_linkcontent)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_symlink);

  /* Tests if symlinking is allowed by configuration. */

  if(!global_fs_info.symlink_support)
    Return(ERR_FSAL_NOTSUPP, 0, INDEX_FSAL_symlink);

  TakeTokenFSCall();

  /* >> call your fs symlink call << */

  ReleaseTokenFSCall();

  /* >> convert status and return on error <<  */

  /* >> set output handle << */

  if(link_attributes)
    {

      /* >> fill output attributes if they are asked << */

    }

  /* OK */
  Return(ERR_FSAL_NO_ERROR, 0, INDEX_FSAL_symlink);
}