fsal_access.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"

fsal_status_t POSIXFSAL_access(fsal_handle_t * object_handle,    /* IN */
                               fsal_op_context_t * context,      /* IN */
                               fsal_accessflags_t access_type,  /* IN */
                               fsal_attrib_list_t * p_object_attributes /* [ IN/OUT ] */
    )
{
  posixfsal_handle_t * p_object_handle = (posixfsal_handle_t *) object_handle;
  posixfsal_op_context_t * p_context = (posixfsal_op_context_t *) context;
  fsal_status_t status;

  /* sanity checks.
   * note : object_attributes is optionnal in FSAL_getattrs.
   */
  if(!p_object_handle || !p_context)
    Return(ERR_FSAL_FAULT, 0, INDEX_FSAL_access);

  /* 
   * If an error occures during getattr operation,
   * it is returned, even though the access operation succeeded.
   */

  if(p_object_attributes)
    {

      FSAL_SET_MASK(p_object_attributes->asked_attributes,
                    FSAL_ATTR_OWNER | FSAL_ATTR_GROUP | FSAL_ATTR_ACL | FSAL_ATTR_MODE);
      status = POSIXFSAL_getattrs(p_object_handle, p_context, p_object_attributes);

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

      status =
          fsal_internal_testAccess(p_context, access_type, NULL, p_object_attributes);

    }
  else
    {                           /* p_object_attributes is NULL */
      fsal_attrib_list_t attrs;

      FSAL_CLEAR_MASK(attrs.asked_attributes);
      FSAL_SET_MASK(attrs.asked_attributes,
                    FSAL_ATTR_OWNER | FSAL_ATTR_GROUP | FSAL_ATTR_ACL | FSAL_ATTR_MODE);

      status = POSIXFSAL_getattrs(object_handle, context, &attrs);

      /* on error, we set a special bit in the mask. */
      if(FSAL_IS_ERROR(status))
        Return(status.major, status.minor, INDEX_FSAL_access);

      status = fsal_internal_testAccess(p_context, access_type, NULL, &attrs);
    }

  Return(status.major, status.minor, INDEX_FSAL_access);

}