Split the native VOL connector code into multiple files and

moved the attribute code over.

1 files changed, 615 insertions, 0 deletions

diff --git a/src/H5VLnative_attr.c b/src/H5VLnative_attr.c
new file mode 100644
index 0000000..9688291
--- /dev/null
+++ b/src/H5VLnative_attr.c
@@ -0,0 +1,615 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:     Attribute code for the native VOL connector.
+ *
+ */
+
+#define H5A_FRIEND              /* Suppress error about including H5Apkg    */
+
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Apkg.h"             /* Attributes                               */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Fprivate.h"         /* Files                                    */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Pprivate.h"         /* Property lists                           */
+#include "H5Sprivate.h"         /* Dataspaces                               */
+#include "H5Tprivate.h"         /* Datatypes                                */
+#include "H5VLprivate.h"        /* Virtual Object Layer                     */
+
+#include "H5VLnative.h"         /* Native VOL connector                     */
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_create
+ *
+ * Purpose:     Handles the attribute create callback
+ *
+ * Return:      Success:    attribute pointer
+ *              Failure:    NULL
+ *
+ *-------------------------------------------------------------------------
+ */
+void *
+H5VL__native_attr_create(void *obj, const H5VL_loc_params_t *loc_params, const char *attr_name,
+    hid_t acpl_id, hid_t H5_ATTR_UNUSED aapl_id, hid_t H5_ATTR_UNUSED dxpl_id,
+    void H5_ATTR_UNUSED **req)
+{
+    H5G_loc_t       loc;                /* Object location */
+    H5G_loc_t       obj_loc;            /* Location used to open group */
+    hbool_t         loc_found = FALSE;  
+    H5P_genplist_t  *plist;             /* Property list pointer */
+    hid_t           type_id, space_id;
+    H5T_t           *type, *dt;         /* Datatype to use for attribute */
+    H5S_t           *space;             /* Dataspace to use for attribute */
+    H5A_t           *attr = NULL;
+    void            *ret_value = NULL;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Get the plist structure */
+    if(NULL == (plist = (H5P_genplist_t *)H5I_object(acpl_id)))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, NULL, "can't find object for ID")
+
+    /* get creation properties */
+    if(H5P_get(plist, H5VL_PROP_ATTR_TYPE_ID, &type_id) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get property value for datatype id")
+    if(H5P_get(plist, H5VL_PROP_ATTR_SPACE_ID, &space_id) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get property value for space id")
+
+    if(H5G_loc_real(obj, loc_params->obj_type, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file or file object")
+    if(0 == (H5F_INTENT(loc.oloc->file) & H5F_ACC_RDWR))
+        HGOTO_ERROR(H5E_ARGS, H5E_WRITEERROR, NULL, "no write intent on file")
+
+    if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a datatype")
+    /* If this is a named datatype, get the connector's pointer to the datatype */
+    type = H5T_get_actual_type(dt);
+
+    if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a data space")
+
+    if(loc_params->type == H5VL_OBJECT_BY_SELF) {
+        /* H5Acreate */
+        /* Go do the real work for attaching the attribute to the dataset */
+        if(NULL == (attr = H5A__create(&loc, attr_name, type, space, acpl_id)))
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to create attribute")
+    } /* end if */
+    else if(loc_params->type == H5VL_OBJECT_BY_NAME) {
+        /* H5Acreate_by_name */
+        if(NULL == (attr = H5A__create_by_name(&loc, loc_params->loc_data.loc_by_name.name, attr_name, type, space, acpl_id)))
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to create attribute")
+    } /* end else-if */
+    else
+        HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, NULL, "unknown attribute create parameters")
+
+    ret_value = (void *)attr;
+
+done:
+    /* Release resources */
+    if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, NULL, "can't free location") 
+
+   FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_open
+ *
+ * Purpose:     Handles the attribute open callback
+ *
+ * Return:      Success:    attribute pointer
+ *              Failure:    NULL
+ *
+ * Programmer:  Mohamad Chaarawi
+ *              March, 2012
+ *
+ *-------------------------------------------------------------------------
+ */
+void *
+H5VL__native_attr_open(void *obj, const H5VL_loc_params_t *loc_params, const char *attr_name, 
+    hid_t H5_ATTR_UNUSED aapl_id, hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED **req)
+{
+    H5G_loc_t    loc;             /* Object location */
+    H5A_t        *attr = NULL;    /* Attribute opened */
+    void         *ret_value;
+
+    FUNC_ENTER_PACKAGE
+
+    /* check arguments */
+    if(H5G_loc_real(obj, loc_params->obj_type, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file or file object")
+
+    if(loc_params->type == H5VL_OBJECT_BY_SELF) {
+        /* H5Aopen */
+        /* Open the attribute */
+        if(NULL == (attr = H5A__open(&loc, attr_name)))
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to open attribute: '%s'", attr_name)
+    } /* end if */
+    else if(loc_params->type == H5VL_OBJECT_BY_NAME) {
+        /* H5Aopen_by_name */
+        /* Open the attribute on the object header */
+        if(NULL == (attr = H5A__open_by_name(&loc, loc_params->loc_data.loc_by_name.name, attr_name)))
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "can't open attribute")
+    } /* end else-if */
+    else if(loc_params->type == H5VL_OBJECT_BY_IDX) {
+        /* H5Aopen_by_idx */
+        /* Open the attribute in the object header */
+        if(NULL == (attr = H5A__open_by_idx(&loc, loc_params->loc_data.loc_by_idx.name, 
+                                           loc_params->loc_data.loc_by_idx.idx_type, 
+                                           loc_params->loc_data.loc_by_idx.order, 
+                                           loc_params->loc_data.loc_by_idx.n)))
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to open attribute")
+    } /* end else-if */
+    else
+        HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, NULL, "unknown attribute open parameters")
+
+    ret_value = (void *)attr;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_read
+ *
+ * Purpose:     Handles the attribute read callback
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:  Mohamad Chaarawi
+ *              March, 2012
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5VL__native_attr_read(void *attr, hid_t dtype_id, void *buf,
+    hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED **req)
+{
+    H5T_t *mem_type;            /* Memory datatype */
+    herr_t ret_value;           /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    if(NULL == (mem_type = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+
+    /* Go write the actual data to the attribute */
+    if((ret_value = H5A__read((H5A_t*)attr, mem_type, buf)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_READERROR, FAIL, "unable to read attribute")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_read() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_write
+ *
+ * Purpose:     Handles the attribute write callback
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:  Mohamad Chaarawi
+ *              March, 2012
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5VL__native_attr_write(void *attr, hid_t dtype_id, const void *buf,
+    hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED **req)
+{
+    H5T_t *mem_type;            /* Memory datatype */
+    herr_t ret_value;           /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    if(NULL == (mem_type = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+
+    /* Go write the actual data to the attribute */
+    if((ret_value = H5A__write((H5A_t*)attr, mem_type, buf)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "unable to write attribute")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_write() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_get
+ *
+ * Purpose:     Handles the attribute get callback
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:  Mohamad Chaarawi
+ *              March, 2012
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5VL__native_attr_get(void *obj, H5VL_attr_get_t get_type,
+    hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED **req, va_list arguments)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    switch(get_type) {
+        /* H5Aget_space */
+        case H5VL_ATTR_GET_SPACE:
+            {
+                hid_t   *ret_id = HDva_arg(arguments, hid_t *);
+                H5A_t   *attr = (H5A_t *)obj;
+
+                if((*ret_id = H5A_get_space(attr)) < 0)
+                    HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get space ID of attribute")
+                break;
+            }
+
+        /* H5Aget_type */
+        case H5VL_ATTR_GET_TYPE:
+            {
+                hid_t   *ret_id = HDva_arg(arguments, hid_t *);
+                H5A_t   *attr = (H5A_t *)obj;
+
+                if((*ret_id = H5A__get_type(attr)) < 0)
+                    HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get datatype ID of attribute")
+                break;
+            }
+
+        /* H5Aget_create_plist */
+        case H5VL_ATTR_GET_ACPL:
+            {
+                hid_t   *ret_id = HDva_arg(arguments, hid_t *);
+                H5A_t   *attr = (H5A_t *)obj;
+
+                if((*ret_id = H5A__get_create_plist(attr)) < 0)
+                    HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get creation property list for attr")
+
+                break;
+            }
+
+        /* H5Aget_name */
+        case H5VL_ATTR_GET_NAME:
+            {
+                const H5VL_loc_params_t *loc_params = HDva_arg(arguments, const H5VL_loc_params_t *);
+                size_t  buf_size = HDva_arg(arguments, size_t);
+                char    *buf = HDva_arg(arguments, char *);
+                ssize_t *ret_val = HDva_arg(arguments, ssize_t *);
+                H5A_t   *attr = NULL;
+
+                if(H5VL_OBJECT_BY_SELF == loc_params->type) {
+                    attr = (H5A_t *)obj;
+                    /* Call private function in turn */
+                    if(0 > (*ret_val = H5A__get_name(attr, buf_size, buf)))
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get attribute name")
+                }
+                else if(H5VL_OBJECT_BY_IDX == loc_params->type) {
+                    H5G_loc_t loc;
+                    
+                    /* check arguments */
+                    if(H5G_loc_real(obj, loc_params->obj_type, &loc) < 0)
+                        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object")
+
+                    /* Open the attribute on the object header */
+                    if(NULL == (attr = H5A__open_by_idx(&loc, loc_params->loc_data.loc_by_idx.name, 
+                                                       loc_params->loc_data.loc_by_idx.idx_type, 
+                                                       loc_params->loc_data.loc_by_idx.order, 
+                                                       loc_params->loc_data.loc_by_idx.n)))
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
+
+                    /* Get the length of the name */
+                    *ret_val = (ssize_t)HDstrlen(attr->shared->name);
+
+                    /* Copy the name into the user's buffer, if given */
+                    if(buf) {
+                        HDstrncpy(buf, attr->shared->name, MIN((size_t)(*ret_val + 1), buf_size));
+                        if((size_t)(*ret_val) >= buf_size)
+                            buf[buf_size - 1]='\0';
+                    } /* end if */
+
+                    /* Release resources */
+                    if(attr && H5A__close(attr) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
+                }
+                else
+                    HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get name of attr")
+
+                break;
+            }
+
+        /* H5Aget_info */
+        case H5VL_ATTR_GET_INFO:
+            {
+                const H5VL_loc_params_t *loc_params = HDva_arg(arguments, const H5VL_loc_params_t *);
+                H5A_info_t   *ainfo = HDva_arg(arguments, H5A_info_t *);
+                H5A_t   *attr = NULL;
+
+                if(H5VL_OBJECT_BY_SELF == loc_params->type) {
+                    attr = (H5A_t *)obj;
+                    if(H5A__get_info(attr, ainfo) < 0)
+                        HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get attribute info")
+                }
+                else if(H5VL_OBJECT_BY_NAME == loc_params->type) {
+                    char *attr_name = HDva_arg(arguments, char *);
+                    H5G_loc_t loc;
+                    
+                    /* check arguments */
+                    if(H5G_loc_real(obj, loc_params->obj_type, &loc) < 0)
+                        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object")
+
+                    /* Open the attribute on the object header */
+                    if(NULL == (attr = H5A__open_by_name(&loc, loc_params->loc_data.loc_by_name.name, attr_name)))
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
+
+                    /* Get the attribute information */
+                    if(H5A__get_info(attr, ainfo) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to get attribute info")
+
+                    /* Release resources */
+                    if(attr && H5A__close(attr) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
+                }
+                else if(H5VL_OBJECT_BY_IDX == loc_params->type) {
+                    H5G_loc_t loc;
+                    
+                    /* check arguments */
+                    if(H5G_loc_real(obj, loc_params->obj_type, &loc) < 0)
+                        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object")
+
+                    /* Open the attribute on the object header */
+                    if(NULL == (attr = H5A__open_by_idx(&loc, loc_params->loc_data.loc_by_idx.name, 
+                                                       loc_params->loc_data.loc_by_idx.idx_type, 
+                                                       loc_params->loc_data.loc_by_idx.order, 
+                                                       loc_params->loc_data.loc_by_idx.n)))
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
+
+                    /* Get the attribute information */
+                    if(H5A__get_info(attr, ainfo) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to get attribute info")
+
+                    /* Release resources */
+                    if(attr && H5A__close(attr) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
+                }
+                else
+                    HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get name of attr")
+
+                break;
+            }
+
+        case H5VL_ATTR_GET_STORAGE_SIZE:
+            {
+                hsize_t *ret = HDva_arg(arguments, hsize_t *);
+                H5A_t   *attr = (H5A_t *)obj;
+
+                /* Set return value */
+                *ret = attr->shared->data_size;
+                break;
+            }
+
+        default:
+            HGOTO_ERROR(H5E_VOL, H5E_CANTGET, FAIL, "can't get this type of information from attr")
+    } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_get() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_specific
+ *
+ * Purpose:     Handles the attribute specific callback
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ * Programmer:  Mohamad Chaarawi
+ *              August, 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5VL__native_attr_specific(void *obj, const H5VL_loc_params_t *loc_params, H5VL_attr_specific_t specific_type, 
+    hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED **req, va_list arguments)
+{
+    H5G_loc_t   loc;
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Get location for passed-in object */
+    if(H5G_loc_real(obj, loc_params->obj_type, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object")
+
+    switch(specific_type) {
+        case H5VL_ATTR_DELETE:
+            {
+                char    *attr_name = HDva_arg(arguments, char *);
+
+                if(H5VL_OBJECT_BY_SELF == loc_params->type) {
+                    /* H5Adelete */
+                    /* Delete the attribute from the location */
+                    if(H5O__attr_remove(loc.oloc, attr_name) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
+                } /* end if */
+                else if(H5VL_OBJECT_BY_NAME == loc_params->type) {
+                    /* H5Adelete_by_name */
+                    /* Delete the attribute */
+                    if(H5A__delete_by_name(&loc, loc_params->loc_data.loc_by_name.name, attr_name) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
+                } /* end else-if */
+                else if(H5VL_OBJECT_BY_IDX == loc_params->type) {
+                    /* H5Adelete_by_idx */
+                    /* Delete the attribute from the location */
+                    if(H5A__delete_by_idx(&loc, loc_params->loc_data.loc_by_idx.name, loc_params->loc_data.loc_by_idx.idx_type,
+                            loc_params->loc_data.loc_by_idx.order, loc_params->loc_data.loc_by_idx.n) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
+                } /* end else-if */
+                else
+                    HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "unknown attribute remove parameters")
+                break;
+            }
+
+        case H5VL_ATTR_EXISTS:
+            {
+                const char *attr_name = HDva_arg(arguments, const char *);
+                htri_t  *ret = HDva_arg(arguments, htri_t *);
+
+                if(loc_params->type == H5VL_OBJECT_BY_SELF) { /* H5Aexists */
+                    /* Check if the attribute exists */
+                    if((*ret = H5O__attr_exists(loc.oloc, attr_name)) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
+                } /* end if */
+                else if(loc_params->type == H5VL_OBJECT_BY_NAME) { /* H5Aexists_by_name */
+                    /* Check if the attribute exists */
+                    if((*ret = H5A__exists_by_name(loc, loc_params->loc_data.loc_by_name.name, attr_name)) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
+                } /* end else-if */
+                else
+                    HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "unknown parameters")
+                break;
+            }
+
+        case H5VL_ATTR_ITER:
+            {
+                H5_index_t          idx_type    = (H5_index_t)HDva_arg(arguments, int); /* enum work-around */
+                H5_iter_order_t     order       = (H5_iter_order_t)HDva_arg(arguments, int); /* enum work-around */
+                hsize_t            *idx         = HDva_arg(arguments, hsize_t *);
+                H5A_operator2_t     op          = HDva_arg(arguments, H5A_operator2_t);
+                void               *op_data     = HDva_arg(arguments, void *);
+
+                if(loc_params->type == H5VL_OBJECT_BY_SELF) { /* H5Aiterate2 */
+                    /* Iterate over attributes */
+                    if((ret_value = H5A__iterate(&loc, ".", idx_type, order, idx, op, op_data)) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error iterating over attributes")
+                } /* end if */
+                else if(loc_params->type == H5VL_OBJECT_BY_NAME) { /* H5Aiterate_by_name */
+                    /* Iterate over attributes by name */
+                    if((ret_value = H5A__iterate(&loc, loc_params->loc_data.loc_by_name.name, idx_type, order, idx, op, op_data)) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "attribute iteration failed");
+                } /* end else-if */
+                else
+                    HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "unknown parameters")
+                break;
+            }
+
+        /* H5Arename/rename_by_name */
+        case H5VL_ATTR_RENAME:
+            {
+                const char *old_name  = HDva_arg(arguments, const char *);
+                const char *new_name  = HDva_arg(arguments, const char *);
+
+                if(loc_params->type == H5VL_OBJECT_BY_SELF) { /* H5Arename */
+                    /* Call attribute rename routine */
+                    if(H5O__attr_rename(loc.oloc, old_name, new_name) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
+                } /* end if */
+                else if(loc_params->type == H5VL_OBJECT_BY_NAME) { /* H5Arename_by_name */
+                    /* Call attribute rename routine */
+                    if(H5A__rename_by_name(loc, loc_params->loc_data.loc_by_name.name, old_name, new_name) < 0)
+                        HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
+                } /* end else-if */
+                else
+                    HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "unknown attribute rename parameters")
+                break;
+            }
+
+        default:
+            HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "invalid specific operation")
+    } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_specific() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_optional
+ *
+ * Purpose:     Handles the attribute optional callback
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5VL__native_attr_optional(void H5_ATTR_UNUSED *obj, hid_t H5_ATTR_UNUSED dxpl_id,
+    void H5_ATTR_UNUSED **req, va_list arguments)
+{
+    H5VL_native_attr_optional_t optional_type;
+    herr_t ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    optional_type = HDva_arg(arguments, H5VL_native_attr_optional_t);
+    switch(optional_type) {
+#ifndef H5_NO_DEPRECATED_SYMBOLS
+        case H5VL_NATIVE_ATTR_ITERATE_OLD:
+            {
+                hid_t loc_id = HDva_arg(arguments, hid_t);
+                unsigned *attr_num = HDva_arg(arguments, unsigned *);
+                H5A_operator1_t op = HDva_arg(arguments, H5A_operator1_t);
+                void *op_data = HDva_arg(arguments, void *);
+
+                /* Call the actual iteration routine */
+                if((ret_value = H5A__iterate_old(loc_id, attr_num, op, op_data)) < 0)
+                    HERROR(H5E_VOL, H5E_BADITER, "error iterating over attributes");
+
+                break;
+            }
+#endif /* H5_NO_DEPRECATED_SYMBOLS */
+
+        default:
+            HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "invalid optional operation")
+    } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_optional() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5VL__native_attr_close
+ *
+ * Purpose:     Handles the attribute close callback
+ *
+ * Return:      Success:    SUCCEED
+ *              Failure:    FAIL, attribute not closed
+ *
+ * Programmer:  Mohamad Chaarawi
+ *              March, 2012
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5VL__native_attr_close(void *attr, hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED **req)
+{
+    herr_t ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    if(H5A__close((H5A_t*)attr) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTDEC, FAIL, "can't close attribute")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5VL__native_attr_close() */
+