fsal_rename.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"

fsal_status_t ZFSFSAL_rename(fsal_handle_t * old_parentdir_handle, /* IN */
                          fsal_name_t * p_old_name,     /* IN */
                          fsal_handle_t * new_parentdir_handle, /* IN */
                          fsal_name_t * p_new_name,     /* IN */
                          fsal_op_context_t * p_context,        /* IN */
                          fsal_attrib_list_t * src_dir_attributes,      /* [ IN/OUT ] */
                          fsal_attrib_list_t * tgt_dir_attributes       /* [ IN/OUT ] */
    )
{

  int rc;
  creden_t cred;

  /* sanity checks.
   * note : src/tgt_dir_attributes are optional.
   */
  if(!old_parentdir_handle ||
     !new_parentdir_handle || !p_old_name || !p_new_name || !p_context)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_rename);

  /* Hook to prenvet moving thing from or to a snapshot */
  if(((zfsfsal_handle_t *)old_parentdir_handle)->data.i_snap != 0 ||
     ((zfsfsal_handle_t *)new_parentdir_handle)->data.i_snap != 0)
  {
    LogDebug(COMPONENT_FSAL, "Trying to rename an object from/to a snapshot");
    Return(ERR_FSAL_ROFS, 0, INDEX_FSAL_rename);
  }
  cred.uid = p_context->credential.user;
  cred.gid = p_context->credential.group;

  TakeTokenFSCall();

  rc = libzfswrap_rename(((zfsfsal_op_context_t *)p_context)->export_context->p_vfs,
                         &cred,
                         ((zfsfsal_handle_t *)old_parentdir_handle)->data.zfs_handle,
                         p_old_name->name,
                         ((zfsfsal_handle_t *)new_parentdir_handle)->data.zfs_handle,
                         p_new_name->name);

  ReleaseTokenFSCall();

  /* >> interpret the returned error << */
  if(rc)
    Return(posix2fsal_error(rc), 0, INDEX_FSAL_rename);

  /* >> get last parent post op attributes if asked
   * For example : << */

  if(src_dir_attributes)
    {
      fsal_status_t st;

      st = ZFSFSAL_getattrs(old_parentdir_handle, p_context, src_dir_attributes);

      if(FSAL_IS_ERROR(st))
        {
          FSAL_CLEAR_MASK(src_dir_attributes->asked_attributes);
          FSAL_SET_MASK(src_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
        }

    }

  /* >> get new parent post op attributes if asked
   * For example : << */

  if(tgt_dir_attributes)
    {
      fsal_status_t st;

      /* optimization when src=tgt : */

      if(!ZFSFSAL_handlecmp(old_parentdir_handle, new_parentdir_handle, &st)
         && src_dir_attributes)
        {

          /* If source dir = target dir, we just copy the attributes.
           * to avoid doing another getattr.
           */

          (*tgt_dir_attributes) = (*src_dir_attributes);

        }
      else
        {

          /* get attributes */
          st = ZFSFSAL_getattrs(new_parentdir_handle, p_context, tgt_dir_attributes);

          if(FSAL_IS_ERROR(st))
            {
              FSAL_CLEAR_MASK(tgt_dir_attributes->asked_attributes);
              FSAL_SET_MASK(tgt_dir_attributes->asked_attributes, FSAL_ATTR_RDATTR_ERR);
            }

        }

    }

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

}