path: root/tools/src/h5stat/h5stat.c

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * 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://www.hdfgroup.org/licenses.               *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "H5private.h" /* Generic Functions      */
#include "h5tools.h"
#include "h5tools_utils.h"
#include "h5tools_ref.h"
#include "h5trav.h"
#include "hdf5.h"

/* Name of tool */
#define PROGRAMNAME "h5stat"

/* Parameters to control statistics gathered */

/* Default threshold for small groups/datasets/attributes */
#define DEF_SIZE_SMALL_GROUPS 10
#define DEF_SIZE_SMALL_DSETS  10
#define DEF_SIZE_SMALL_ATTRS  10

#define SIZE_SMALL_SECTS 10

#define H5_NFILTERS_IMPL                                                                                     \
    8 /* Number of currently implemented filters + one to                                                    \
         accommodate for user-define filters + one                                                           \
         to accomodate datasets whithout any filters */

/* File space management strategies: see H5Fpublic.h for declarations */
const char *FS_STRATEGY_NAME[] = {"H5F_FSPACE_STRATEGY_FSM_AGGR",
                                  "H5F_FSPACE_STRATEGY_PAGE",
                                  "H5F_FSPACE_STRATEGY_AGGR",
                                  "H5F_FSPACE_STRATEGY_NONE",
                                  "unknown",
                                  NULL};

/* Datatype statistics for datasets */
typedef struct dtype_info_t {
    hid_t         tid;   /* ID of datatype */
    unsigned long count; /* Number of types found */
    unsigned long named; /* Number of types that are named */
} dtype_info_t;

typedef struct ohdr_info_t {
    hsize_t total_size; /* Total size of object headers */
    hsize_t free_size;  /* Total free space in object headers */
} ohdr_info_t;

/* Info to pass to the iteration functions */
typedef struct iter_t {
    hid_t         fid;         /* File ID */
    hsize_t       filesize;    /* Size of the file */
    unsigned long uniq_groups; /* Number of unique groups */
    unsigned long uniq_dsets;  /* Number of unique datasets */
    unsigned long uniq_dtypes; /* Number of unique named datatypes */
    unsigned long uniq_links;  /* Number of unique links */
    unsigned long uniq_others; /* Number of other unique objects */

    unsigned long  max_links;        /* Maximum # of links to an object */
    hsize_t        max_fanout;       /* Maximum fanout from a group */
    unsigned long *num_small_groups; /* Size of small groups tracked */
    unsigned       group_nbins;      /* Number of bins for group counts */
    unsigned long *group_bins;       /* Pointer to array of bins for group counts */
    ohdr_info_t    group_ohdr_info;  /* Object header information for groups */

    hsize_t        max_attrs;       /* Maximum attributes from a group */
    unsigned long *num_small_attrs; /* Size of small attributes tracked */
    unsigned       attr_nbins;      /* Number of bins for attribute counts */
    unsigned long *attr_bins;       /* Pointer to array of bins for attribute counts */

    unsigned       max_dset_rank;                   /* Maximum rank of dataset */
    unsigned long  dset_rank_count[H5S_MAX_RANK];   /* Number of datasets of each rank */
    hsize_t        max_dset_dims;                   /* Maximum dimension size of dataset */
    unsigned long *small_dset_dims;                 /* Size of dimensions of small datasets tracked */
    unsigned long  dset_layouts[H5D_NLAYOUTS];      /* Type of storage for each dataset */
    unsigned long  dset_comptype[H5_NFILTERS_IMPL]; /* Number of currently implemented filters */
    unsigned long  dset_ntypes;                     /* Number of diff. dataset datatypes found */
    dtype_info_t * dset_type_info;                  /* Pointer to dataset datatype information found */
    unsigned       dset_dim_nbins;                  /* Number of bins for dataset dimensions */
    unsigned long *dset_dim_bins;                   /* Pointer to array of bins for dataset dimensions */
    ohdr_info_t    dset_ohdr_info;                  /* Object header information for datasets */
    hsize_t        dset_storage_size;               /* Size of raw data for datasets */
    hsize_t        dset_external_storage_size;      /* Size of raw data for datasets with external storage */
    ohdr_info_t    dtype_ohdr_info;                 /* Object header information for datatypes */
    hsize_t        groups_btree_storage_size;       /* btree size for group */
    hsize_t        groups_heap_storage_size;        /* heap size for group */
    hsize_t        attrs_btree_storage_size;        /* btree size for attributes (1.8) */
    hsize_t        attrs_heap_storage_size;         /* fractal heap size for attributes (1.8) */
    hsize_t        SM_hdr_storage_size;             /* header size for SOHM table (1.8) */
    hsize_t        SM_index_storage_size;           /* index (btree & list) size for SOHM table (1.8) */
    hsize_t        SM_heap_storage_size;            /* fractal heap size for SOHM table (1.8) */
    hsize_t        super_size;                      /* superblock size */
    hsize_t        super_ext_size;                  /* superblock extension size */
    hsize_t        ublk_size;                       /* user block size (if exists) */
    H5F_fspace_strategy_t fs_strategy;              /* File space management strategy */
    hbool_t               fs_persist;               /* Free-space persist or not */
    hsize_t               fs_threshold;             /* Free-space section threshold */
    hsize_t               fsp_size;                 /* File space page size */
    hsize_t               free_space;               /* Amount of freespace in the file */
    hsize_t               free_hdr;                 /* Size of free space manager metadata in the file */
    unsigned long         num_small_sects[SIZE_SMALL_SECTS]; /* Size of small free-space sections */
    unsigned              sect_nbins;                        /* Number of bins for free-space section sizes */
    unsigned long *       sect_bins; /* Pointer to array of bins for free-space section sizes */
    hsize_t               datasets_index_storage_size; /* meta size for chunked dataset's indexing type */
    hsize_t               datasets_heap_storage_size;  /* heap size for dataset with external storage */
    unsigned long         nexternal;                   /* Number of external files for a dataset */
    int                   local;                       /* Flag to indicate iteration over the object*/
} iter_t;

static const char *drivername = NULL;

#ifdef H5_HAVE_ROS3_VFD
/* Default "anonymous" S3 configuration */
static H5FD_ros3_fapl_t ros3_fa = {
    1,     /* Structure Version */
    false, /* Authenticate?     */
    "",    /* AWS Region        */
    "",    /* Access Key ID     */
    "",    /* Secret Access Key */
};
#endif /* H5_HAVE_ROS3_VFD */

#ifdef H5_HAVE_LIBHDFS
/* "Default" HDFS configuration */
static H5FD_hdfs_fapl_t hdfs_fa = {
    1,           /* Structure Version     */
    "localhost", /* Namenode Name         */
    0,           /* Namenode Port         */
    "",          /* Kerberos ticket cache */
    "",          /* User name             */
    2048,        /* Stream buffer size    */
};
#endif /* H5_HAVE_LIBHDFS */

static int display_all = TRUE;

/* Enable the printing of selected statistics */
static int display_file            = FALSE; /* display file information */
static int display_group           = FALSE; /* display groups information */
static int display_dset            = FALSE; /* display datasets information */
static int display_dset_dtype_meta = FALSE; /* display datasets' datatype information */
static int display_attr            = FALSE; /* display attributes information */
static int display_free_sections   = FALSE; /* display free space information */
static int display_summary         = FALSE; /* display summary of file space information */

static int display_file_metadata  = FALSE; /* display file space info for file's metadata */
static int display_group_metadata = FALSE; /* display file space info for groups' metadata */
static int display_dset_metadata  = FALSE; /* display file space info for datasets' metadata */

static int display_object = FALSE; /* not implemented yet */

/* Initialize threshold for small groups/datasets/attributes */
static int sgroups_threshold = DEF_SIZE_SMALL_GROUPS;
static int sdsets_threshold  = DEF_SIZE_SMALL_DSETS;
static int sattrs_threshold  = DEF_SIZE_SMALL_ATTRS;

/* a structure for handling the order command-line parameters come in */
struct handler_t {
    size_t obj_count;
    char **obj;
};

static const char *s_opts = "Aa:Ddm:EFfhGgl:sSTO:Vw:H:";
/* e.g. "filemetadata" has to precede "file"; "groupmetadata" has to precede "group" etc. */
static struct long_options l_opts[] = {{"help", no_arg, 'h'},
                                       {"hel", no_arg, 'h'},
                                       {"he", no_arg, 'h'},
                                       {"filemetadata", no_arg, 'F'},
                                       {"filemetadat", no_arg, 'F'},
                                       {"filemetada", no_arg, 'F'},
                                       {"filemetad", no_arg, 'F'},
                                       {"filemeta", no_arg, 'F'},
                                       {"filemet", no_arg, 'F'},
                                       {"fileme", no_arg, 'F'},
                                       {"filem", no_arg, 'F'},
                                       {"file", no_arg, 'f'},
                                       {"fil", no_arg, 'f'},
                                       {"fi", no_arg, 'f'},
                                       {"groupmetadata", no_arg, 'G'},
                                       {"groupmetadat", no_arg, 'G'},
                                       {"groupmetada", no_arg, 'G'},
                                       {"groupmetad", no_arg, 'G'},
                                       {"groupmeta", no_arg, 'G'},
                                       {"groupmet", no_arg, 'G'},
                                       {"groupme", no_arg, 'G'},
                                       {"groupm", no_arg, 'G'},
                                       {"group", no_arg, 'g'},
                                       {"grou", no_arg, 'g'},
                                       {"gro", no_arg, 'g'},
                                       {"gr", no_arg, 'g'},
                                       {"links", require_arg, 'l'},
                                       {"link", require_arg, 'l'},
                                       {"lin", require_arg, 'l'},
                                       {"li", require_arg, 'l'},
                                       {"dsetmetadata", no_arg, 'D'},
                                       {"dsetmetadat", no_arg, 'D'},
                                       {"dsetmetada", no_arg, 'D'},
                                       {"dsetmetad", no_arg, 'D'},
                                       {"dsetmeta", no_arg, 'D'},
                                       {"dsetmet", no_arg, 'D'},
                                       {"dsetme", no_arg, 'D'},
                                       {"dsetm", no_arg, 'D'},
                                       {"dset", no_arg, 'd'},
                                       {"dse", no_arg, 'd'},
                                       {"ds", no_arg, 'd'},
                                       {"dims", require_arg, 'm'},
                                       {"dim", require_arg, 'm'},
                                       {"di", require_arg, 'm'},
                                       {"dtypemetadata", no_arg, 'T'},
                                       {"dtypemetadat", no_arg, 'T'},
                                       {"dtypemetada", no_arg, 'T'},
                                       {"dtypemetad", no_arg, 'T'},
                                       {"dtypemeta", no_arg, 'T'},
                                       {"dtypemet", no_arg, 'T'},
                                       {"dtypeme", no_arg, 'T'},
                                       {"dtypem", no_arg, 'T'},
                                       {"dtype", no_arg, 'T'},
                                       {"dtyp", no_arg, 'T'},
                                       {"dty", no_arg, 'T'},
                                       {"dt", no_arg, 'T'},
                                       {"object", require_arg, 'O'},
                                       {"objec", require_arg, 'O'},
                                       {"obje", require_arg, 'O'},
                                       {"obj", require_arg, 'O'},
                                       {"ob", require_arg, 'O'},
                                       {"version", no_arg, 'V'},
                                       {"versio", no_arg, 'V'},
                                       {"versi", no_arg, 'V'},
                                       {"vers", no_arg, 'V'},
                                       {"ver", no_arg, 'V'},
                                       {"ve", no_arg, 'V'},
                                       {"attribute", no_arg, 'A'},
                                       {"attribut", no_arg, 'A'},
                                       {"attribu", no_arg, 'A'},
                                       {"attrib", no_arg, 'A'},
                                       {"attri", no_arg, 'A'},
                                       {"attr", no_arg, 'A'},
                                       {"att", no_arg, 'A'},
                                       {"at", no_arg, 'A'},
                                       {"enable-error-stack", no_arg, 'E'},
                                       {"numattrs", require_arg, 'a'},
                                       {"numattr", require_arg, 'a'},
                                       {"numatt", require_arg, 'a'},
                                       {"numat", require_arg, 'a'},
                                       {"numa", require_arg, 'a'},
                                       {"num", require_arg, 'a'},
                                       {"nu", require_arg, 'a'},
                                       {"freespace", no_arg, 's'},
                                       {"freespac", no_arg, 's'},
                                       {"freespa", no_arg, 's'},
                                       {"freesp", no_arg, 's'},
                                       {"frees", no_arg, 's'},
                                       {"free", no_arg, 's'},
                                       {"fre", no_arg, 's'},
                                       {"fr", no_arg, 's'},
                                       {"summary", no_arg, 'S'},
                                       {"summar", no_arg, 'S'},
                                       {"summa", no_arg, 'S'},
                                       {"summ", no_arg, 'S'},
                                       {"sum", no_arg, 'S'},
                                       {"su", no_arg, 'S'},
                                       {"s3-cred", require_arg, 'w'},
                                       {"hdfs-attrs", require_arg, 'H'},
                                       {NULL, 0, '\0'}};

static void
leave(int ret)
{
    h5tools_close();
    HDexit(ret);
}

/*-------------------------------------------------------------------------
 * Function: usage
 *
 * Purpose: Compute the ceiling of log_10(x)
 *
 * Return: >0 on success, 0 on failure
 *
 *-------------------------------------------------------------------------
 */
static void
usage(const char *prog)
{
    HDfflush(stdout);
    HDfprintf(stdout, "Usage: %s [OPTIONS] file\n", prog);
    HDfprintf(stdout, "\n");
    HDfprintf(stdout, "      OPTIONS\n");
    HDfprintf(stdout, "     -h, --help            Print a usage message and exit\n");
    HDfprintf(stdout, "     -V, --version         Print version number and exit\n");
    HDfprintf(stdout, "     -f, --file            Print file information\n");
    HDfprintf(stdout, "     -F, --filemetadata    Print file space information for file's metadata\n");
    HDfprintf(stdout, "     -g, --group           Print group information\n");
    HDfprintf(stdout, "     -l N, --links=N       Set the threshold for the # of links when printing\n");
    HDfprintf(stdout, "                           information for small groups.  N is an integer greater\n");
    HDfprintf(stdout, "                           than 0.  The default threshold is 10.\n");
    HDfprintf(stdout, "     -G, --groupmetadata   Print file space information for groups' metadata\n");
    HDfprintf(stdout, "     -d, --dset            Print dataset information\n");
    HDfprintf(stdout, "     -m N, --dims=N        Set the threshold for the dimension sizes when printing\n");
    HDfprintf(stdout,
              "                           information for small datasets.  N is an integer greater\n");
    HDfprintf(stdout, "                           than 0.  The default threshold is 10.\n");
    HDfprintf(stdout, "     -D, --dsetmetadata    Print file space information for datasets' metadata\n");
    HDfprintf(stdout, "     -T, --dtypemetadata   Print datasets' datatype information\n");
    HDfprintf(stdout, "     -A, --attribute       Print attribute information\n");
    HDfprintf(stdout, "     -a N, --numattrs=N    Set the threshold for the # of attributes when printing\n");
    HDfprintf(stdout,
              "                           information for small # of attributes.  N is an integer greater\n");
    HDfprintf(stdout, "                           than 0.  The default threshold is 10.\n");
    HDfprintf(stdout, "     -s, --freespace       Print free space information\n");
    HDfprintf(stdout, "     -S, --summary         Print summary of file space information\n");
    HDfprintf(stdout, "     --enable-error-stack  Prints messages from the HDF5 error stack as they occur\n");
    HDfprintf(stdout, "     --s3-cred=<cred>      Access file on S3, using provided credential\n");
    HDfprintf(stdout, "                           <cred> :: (region,id,key)\n");
    HDfprintf(stdout, "                           If <cred> == \"(,,)\", no authentication is used.\n");
    HDfprintf(stdout, "     --hdfs-attrs=<attrs>  Access a file on HDFS with given configuration\n");
    HDfprintf(stdout, "                           attributes.\n");
    HDfprintf(stdout, "                           <attrs> :: (<namenode name>,<namenode port>,\n");
    HDfprintf(stdout, "                                       <kerberos cache path>,<username>,\n");
    HDfprintf(stdout, "                                       <buffer size>)\n");
    HDfprintf(stdout, "                           If an attribute is empty, a default value will be\n");
    HDfprintf(stdout, "                           used.\n");
}

/*-------------------------------------------------------------------------
 * Function: ceil_log10
 *
 * Purpose: Compute the ceiling of log_10(x)
 *
 * Return: >0 on success, 0 on failure
 *
 * Programmer: Quincey Koziol
 *              Monday, August 22, 2005
 *
 *-------------------------------------------------------------------------
 */
H5_ATTR_CONST static unsigned
ceil_log10(unsigned long x)
{
    unsigned long pow10 = 1;
    unsigned      ret   = 0;

    while (x >= pow10) {
        pow10 *= 10;
        ret++;
    } /* end while */

    return ret;
} /* ceil_log10() */

/*-------------------------------------------------------------------------
 * Function: attribute_stats
 *
 * Purpose: Gather statistics about attributes on an object
 *
 * Return:  Success: 0
 *
 *          Failure: -1
 *
 * Programmer:    Quincey Koziol
 *                Tuesday, July 17, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
attribute_stats(iter_t *iter, const H5O_info2_t *oi, const H5O_native_info_t *native_oi)
{
    unsigned bin; /* "bin" the number of objects falls in */

    /* Update dataset & attribute metadata info */
    iter->attrs_btree_storage_size += native_oi->meta_size.attr.index_size;
    iter->attrs_heap_storage_size += native_oi->meta_size.attr.heap_size;

    /* Update small # of attribute count & limits */
    if (oi->num_attrs <= (hsize_t)sattrs_threshold)
        (iter->num_small_attrs[(size_t)oi->num_attrs])++;
    if (oi->num_attrs > iter->max_attrs)
        iter->max_attrs = oi->num_attrs;

    /* Add attribute count to proper bin */
    bin = ceil_log10((unsigned long)oi->num_attrs);
    if ((bin + 1) > iter->attr_nbins) {
        iter->attr_bins = (unsigned long *)HDrealloc(iter->attr_bins, (bin + 1) * sizeof(unsigned long));
        HDassert(iter->attr_bins);

        /* Initialize counts for intermediate bins */
        while (iter->attr_nbins < bin)
            iter->attr_bins[iter->attr_nbins++] = 0;
        iter->attr_nbins++;

        /* Initialize count for new bin */
        iter->attr_bins[bin] = 1;
    } /* end if */
    else
        (iter->attr_bins[bin])++;

    return 0;
} /* end attribute_stats() */

/*-------------------------------------------------------------------------
 * Function: group_stats
 *
 * Purpose: Gather statistics about the group
 *
 * Return:  Success: 0
 *          Failure: -1
 *
 * Programmer: Quincey Koziol
 *             Tuesday, August 16, 2005
 *
 * Modifications: Refactored code from the walk_function
 *                EIP, Wednesday, August 16, 2006
 *
 *      Vailin Choi 12 July 2007
 *      1. Gathered storage info for btree and heap
 *         (groups and attributes)
 *      2. Gathered info for attributes
 *
 *      Vailin Choi 14 July 2007
 *      Cast "num_objs" and "num_attrs" to size_t
 *      Due to the -Mbounds problem for the pgi-32 bit compiler on indexing
 *
 *-------------------------------------------------------------------------
 */
static herr_t
group_stats(iter_t *iter, const char *name, const H5O_info2_t *oi, const H5O_native_info_t *native_oi)
{
    H5G_info_t ginfo; /* Group information */
    unsigned   bin;   /* "bin" the number of objects falls in */
    herr_t     ret_value = SUCCEED;

    /* Gather statistics about this type of object */
    iter->uniq_groups++;

    /* Get object header information */
    iter->group_ohdr_info.total_size += native_oi->hdr.space.total;
    iter->group_ohdr_info.free_size += native_oi->hdr.space.free;

    /* Get group information */
    if ((ret_value = H5Gget_info_by_name(iter->fid, name, &ginfo, H5P_DEFAULT)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Gget_info_by_name() failed");

    /* Update link stats */
    /* Collect statistics for small groups */
    if (ginfo.nlinks < (hsize_t)sgroups_threshold)
        (iter->num_small_groups[(size_t)ginfo.nlinks])++;
    /* Determine maximum link count */
    if (ginfo.nlinks > iter->max_fanout)
        iter->max_fanout = ginfo.nlinks;

    /* Add group count to proper bin */
    bin = ceil_log10((unsigned long)ginfo.nlinks);
    if ((bin + 1) > iter->group_nbins) {
        /* Allocate more storage for info about dataset's datatype */
        if ((iter->group_bins =
                 (unsigned long *)HDrealloc(iter->group_bins, (bin + 1) * sizeof(unsigned long))) == NULL)
            H5TOOLS_GOTO_ERROR(FAIL, "H5Drealloc() failed");

        /* Initialize counts for intermediate bins */
        while (iter->group_nbins < bin)
            iter->group_bins[iter->group_nbins++] = 0;
        iter->group_nbins++;

        /* Initialize count for new bin */
        iter->group_bins[bin] = 1;
    } /* end if */
    else
        (iter->group_bins[bin])++;

    /* Update group metadata info */
    iter->groups_btree_storage_size += native_oi->meta_size.obj.index_size;
    iter->groups_heap_storage_size += native_oi->meta_size.obj.heap_size;

    /* Update attribute metadata info */
    if ((ret_value = attribute_stats(iter, oi, native_oi)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "attribute_stats failed");

done:
    return ret_value;
} /* end group_stats() */

/*-------------------------------------------------------------------------
 * Function: dataset_stats
 *
 * Purpose: Gather statistics about the dataset
 *
 * Return:  Success: 0
 *          Failure: -1
 *
 * Programmer:    Quincey Koziol
 *                Tuesday, August 16, 2005
 *
 *-------------------------------------------------------------------------
 */
static herr_t
dataset_stats(iter_t *iter, const char *name, const H5O_info2_t *oi, const H5O_native_info_t *native_oi)
{
    unsigned     bin;                /* "bin" the number of objects falls in */
    hid_t        did;                /* Dataset ID */
    hid_t        sid;                /* Dataspace ID */
    hid_t        tid;                /* Datatype ID */
    hid_t        dcpl;               /* Dataset creation property list ID */
    hsize_t      dims[H5S_MAX_RANK]; /* Dimensions of dataset */
    H5D_layout_t lout;               /* Layout of dataset */
    unsigned     type_found;         /* Whether the dataset's datatype was */
                                     /* already found */
    int          ndims;              /* Number of dimensions of dataset */
    hsize_t      storage;            /* Size of dataset storage */
    unsigned     u;                  /* Local index variable */
    int          num_ext;            /* Number of external files for a dataset */
    int          nfltr;              /* Number of filters for a dataset */
    H5Z_filter_t fltr;               /* Filter identifier */
    herr_t       ret_value = SUCCEED;

    /* Gather statistics about this type of object */
    iter->uniq_dsets++;

    /* Get object header information */
    iter->dset_ohdr_info.total_size += native_oi->hdr.space.total;
    iter->dset_ohdr_info.free_size += native_oi->hdr.space.free;

    if ((did = H5Dopen2(iter->fid, name, H5P_DEFAULT)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Dopen() failed");

    /* Update dataset metadata info */
    iter->datasets_index_storage_size += native_oi->meta_size.obj.index_size;
    iter->datasets_heap_storage_size += native_oi->meta_size.obj.heap_size;

    /* Update attribute metadata info */
    if ((ret_value = attribute_stats(iter, oi, native_oi)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "attribute_stats() failed");

    /* Get storage info */
    /* Failure 0 indistinguishable from no-data-stored 0 */
    storage = H5Dget_storage_size(did);

    /* Gather layout statistics */
    if ((dcpl = H5Dget_create_plist(did)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Dget_create_plist() failed");

    if ((lout = H5Pget_layout(dcpl)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Pget_layout() failed");

    /* Object header's total size for H5D_COMPACT layout includes raw data size */
    /* "storage" also includes H5D_COMPACT raw data size */
    if (lout == H5D_COMPACT)
        iter->dset_ohdr_info.total_size -= storage;

    /* Track the layout type for dataset */
    (iter->dset_layouts[lout])++;

    /* Get the number of external files for the dataset */
    if ((num_ext = H5Pget_external_count(dcpl)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Pget_external_count() failed");

    /* Accumulate raw data size accordingly */
    if (num_ext) {
        iter->nexternal += (unsigned long)num_ext;
        iter->dset_external_storage_size += (unsigned long)storage;
    }
    else
        iter->dset_storage_size += storage;

    /* Gather dataspace statistics */
    if ((sid = H5Dget_space(did)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Sget_space() failed");

    if ((ndims = H5Sget_simple_extent_dims(sid, dims, NULL)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Sget_simple_extent_dims() failed");

    /* Check for larger rank of dataset */
    if ((unsigned)ndims > iter->max_dset_rank)
        iter->max_dset_rank = (unsigned)ndims;

    /* Track the number of datasets with each rank */
    (iter->dset_rank_count[ndims])++;

    /* Only gather dim size statistics on 1-D datasets */
    if (ndims == 1) {
        /* Determine maximum dimension size */
        if (dims[0] > iter->max_dset_dims)
            iter->max_dset_dims = dims[0];
        /* Collect statistics for small datasets */
        if (dims[0] < (hsize_t)sdsets_threshold)
            (iter->small_dset_dims[(size_t)dims[0]])++;

        /* Add dim count to proper bin */
        bin = ceil_log10((unsigned long)dims[0]);
        if ((bin + 1) > iter->dset_dim_nbins) {
            /* Allocate more storage for info about dataset's datatype */
            if ((iter->dset_dim_bins = (unsigned long *)HDrealloc(iter->dset_dim_bins,
                                                                  (bin + 1) * sizeof(unsigned long))) == NULL)
                H5TOOLS_GOTO_ERROR(FAIL, "H5Drealloc() failed");

            /* Initialize counts for intermediate bins */
            while (iter->dset_dim_nbins < bin)
                iter->dset_dim_bins[iter->dset_dim_nbins++] = 0;
            iter->dset_dim_nbins++;

            /* Initialize count for this bin */
            iter->dset_dim_bins[bin] = 1;
        } /* end if */
        else
            (iter->dset_dim_bins[bin])++;
    } /* end if */

    if (H5Sclose(sid) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Sclose() failed");

    /* Gather datatype statistics */
    if ((tid = H5Dget_type(did)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Dget_type() failed");

    type_found = FALSE;
    for (u = 0; u < iter->dset_ntypes; u++)
        if (H5Tequal(iter->dset_type_info[u].tid, tid) > 0) {
            type_found = TRUE;
            break;
        } /* end for */

    if (type_found)
        (iter->dset_type_info[u].count)++;
    else {
        unsigned curr_ntype = (unsigned)iter->dset_ntypes;

        /* Increment # of datatypes seen for datasets */
        iter->dset_ntypes++;

        /* Allocate more storage for info about dataset's datatype */
        if ((iter->dset_type_info = (dtype_info_t *)HDrealloc(
                 iter->dset_type_info, iter->dset_ntypes * sizeof(dtype_info_t))) == NULL)
            H5TOOLS_GOTO_ERROR(FAIL, "H5Drealloc() failed");

        /* Initialize information about datatype */
        if ((iter->dset_type_info[curr_ntype].tid = H5Tcopy(tid)) < 0)
            H5TOOLS_GOTO_ERROR(FAIL, "H5Tcopy() failed");
        iter->dset_type_info[curr_ntype].count = 1;
        iter->dset_type_info[curr_ntype].named = 0;

        /* Set index for later */
        u = curr_ntype;
    } /* end else */

    /* Check if the datatype is a named datatype */
    if (H5Tcommitted(tid) > 0)
        (iter->dset_type_info[u].named)++;

    if (H5Tclose(tid) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Tclose() failed");

    /* Track different filters */
    if ((nfltr = H5Pget_nfilters(dcpl)) >= 0) {
        if (nfltr == 0)
            iter->dset_comptype[0]++;
        for (u = 0; u < (unsigned)nfltr; u++) {
            fltr = H5Pget_filter2(dcpl, u, 0, 0, 0, 0, 0, NULL);
            if (fltr >= 0) {
                if (fltr < (H5_NFILTERS_IMPL - 1))
                    iter->dset_comptype[fltr]++;
                else
                    iter->dset_comptype[H5_NFILTERS_IMPL - 1]++; /*other filters*/
            }                                                    /* end if */
        }                                                        /* end for */
    }                                                            /* endif nfltr */

    if (H5Pclose(dcpl) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Pclose() failed");

    if (H5Dclose(did) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "H5Dclose() failed");

done:
    return ret_value;
} /* end dataset_stats() */

/*-------------------------------------------------------------------------
 * Function: datatype_stats
 *
 * Purpose: Gather statistics about the datatype
 *
 * Return:  Success: 0
 *          Failure: -1
 *
 * Programmer:    Vailin Choi; July 7th, 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
datatype_stats(iter_t *iter, const H5O_info2_t *oi, const H5O_native_info_t *native_oi)
{
    herr_t ret_value = SUCCEED;

    /* Gather statistics about this type of object */
    iter->uniq_dtypes++;

    /* Get object header information */
    iter->dtype_ohdr_info.total_size += native_oi->hdr.space.total;
    iter->dtype_ohdr_info.free_size += native_oi->hdr.space.free;

    /* Update attribute metadata info */
    if ((ret_value = attribute_stats(iter, oi, native_oi)) < 0)
        H5TOOLS_GOTO_ERROR(FAIL, "attribute_stats() failed");
done:
    return ret_value;
} /* end datatype_stats() */

/*-------------------------------------------------------------------------
 * Function: obj_stats
 *
 * Purpose: Gather statistics about an object
 *
 * Return: Success: 0
 *       Failure: -1
 *
 * Programmer: Quincey Koziol
 *             Tuesday, November 6, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
obj_stats(const char *path, const H5O_info2_t *oi, const char *already_visited, void *_iter)
{
    H5O_native_info_t native_info;
    iter_t *          iter      = (iter_t *)_iter;
    herr_t            ret_value = SUCCEED;

    /* If the object has already been seen then just return */
    if (NULL == already_visited) {
        /* Retrieve the native info for the object */
        if (H5Oget_native_info_by_name(iter->fid, path, &native_info, H5O_NATIVE_INFO_ALL, H5P_DEFAULT) < 0)
            H5TOOLS_GOTO_ERROR(FAIL, "H5Oget_native_info_by_name failed");

        /* Gather some general statistics about the object */
        if (oi->rc > iter->max_links)
            iter->max_links = oi->rc;

        switch (oi->type) {
            case H5O_TYPE_GROUP:
                if (group_stats(iter, path, oi, &native_info) < 0)
                    H5TOOLS_GOTO_ERROR(FAIL, "group_stats failed");
                break;

            case H5O_TYPE_DATASET:
                if (dataset_stats(iter, path, oi, &native_info) < 0)
                    H5TOOLS_GOTO_ERROR(FAIL, "dataset_stats failed");
                break;

            case H5O_TYPE_NAMED_DATATYPE:
                if (datatype_stats(iter, oi, &native_info) < 0)
                    H5TOOLS_GOTO_ERROR(FAIL, "datatype_stats failed");
                break;

            case H5O_TYPE_MAP:
            case H5O_TYPE_UNKNOWN:
            case H5O_TYPE_NTYPES:
            default:
                /* Gather statistics about this type of object */
                iter->uniq_others++;
                break;
        } /* end switch */
    }     /* end if */

done:
    return ret_value;
} /* end obj_stats() */

/*-------------------------------------------------------------------------
 * Function: lnk_stats
 *
 * Purpose: Gather statistics about a link
 *
 * Return:  Success: 0
 *          Failure: -1
 *
 * Programmer: Quincey Koziol
 *             Tuesday, November 6, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
lnk_stats(const char H5_ATTR_UNUSED *path, const H5L_info2_t *li, void *_iter)
{
    iter_t *iter = (iter_t *)_iter;

    switch (li->type) {
        case H5L_TYPE_SOFT:
        case H5L_TYPE_EXTERNAL:
            /* Gather statistics about links and UD links */
            iter->uniq_links++;
            break;

        case H5L_TYPE_HARD:
        case H5L_TYPE_MAX:
        case H5L_TYPE_ERROR:
        default:
            /* Gather statistics about this type of object */
            iter->uniq_others++;
            break;
    } /* end switch() */

    return 0;
} /* end lnk_stats() */

/*-------------------------------------------------------------------------
 * Function: freespace_stats
 *
 * Purpose: Gather statistics for free space sections in the file
 *
 * Return: Success: 0
 *       Failure: -1
 *
 * Programmer:  Vailin Choi; July 7th, 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
freespace_stats(hid_t fid, iter_t *iter)
{
    H5F_sect_info_t *sect_info = NULL; /* Free space sections */
    ssize_t          nsects;           /* Number of free space sections */
    size_t           u;                /* Local index variable */

    /* Query section information */
    if ((nsects = H5Fget_free_sections(fid, H5FD_MEM_DEFAULT, 0, NULL)) < 0)
        return (FAIL);
    else if (nsects) {
        if (NULL == (sect_info = (H5F_sect_info_t *)HDcalloc((size_t)nsects, sizeof(H5F_sect_info_t))))
            return (FAIL);
        nsects = H5Fget_free_sections(fid, H5FD_MEM_DEFAULT, (size_t)nsects, sect_info);
        HDassert(nsects);
    } /* end else-if */

    for (u = 0; u < (size_t)nsects; u++) {
        unsigned bin; /* "bin" the number of objects falls in */

        if (sect_info[u].size < SIZE_SMALL_SECTS)
            (iter->num_small_sects[(size_t)sect_info[u].size])++;

        /* Add section size to proper bin */
        bin = ceil_log10((unsigned long)sect_info[u].size);
        if (bin >= iter->sect_nbins) {
            /* Allocate more storage for section info */
            iter->sect_bins = (unsigned long *)HDrealloc(iter->sect_bins, (bin + 1) * sizeof(unsigned long));
            HDassert(iter->sect_bins);

            /* Initialize counts for intermediate bins */
            while (iter->sect_nbins < bin)
                iter->sect_bins[iter->sect_nbins++] = 0;
            iter->sect_nbins++;

            /* Initialize count for this bin */
            iter->sect_bins[bin] = 1;
        } /* end if */
        else
            (iter->sect_bins[bin])++;
    } /* end for */

    if (sect_info)
        HDfree(sect_info);

    return 0;
} /* end freespace_stats() */

/*-------------------------------------------------------------------------
 * Function: hand_free
 *
 * Purpose: Free handler structure
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 *-------------------------------------------------------------------------
 */
static void
hand_free(struct handler_t *hand)
{
    if (hand) {
        unsigned u;

        for (u = 0; u < hand->obj_count; u++)
            if (hand->obj[u]) {
                HDfree(hand->obj[u]);
                hand->obj[u] = NULL;
            } /* end if */
        hand->obj_count = 0;
        HDfree(hand->obj);
        HDfree(hand);
    } /* end if */
} /* end hand_free() */

/*-------------------------------------------------------------------------
 * Function: parse_command_line
 *
 * Purpose: Parses command line and sets up global variable to control output
 *
 * Return: Success: 0
 *
 * Failure: -1
 *
 * Programmer: Elena Pourmal
 *             Saturday, August 12, 2006
 *
 *-------------------------------------------------------------------------
 */
static int
parse_command_line(int argc, const char *argv[], struct handler_t **hand_ret)
{
    int               opt;
    unsigned          u;
    struct handler_t *hand = NULL;

    /* parse command line options */
    while ((opt = get_option(argc, argv, s_opts, l_opts)) != EOF) {
        switch ((char)opt) {
            case 'h':
                usage(h5tools_getprogname());
                h5tools_setstatus(EXIT_SUCCESS);
                goto done;
                break;

            case 'V':
                print_version(h5tools_getprogname());
                h5tools_setstatus(EXIT_SUCCESS);
                goto done;
                break;

            case 'E':
                enable_error_stack = 1;
                break;

            case 'F':
                display_all           = FALSE;
                display_file_metadata = TRUE;
                break;

            case 'f':
                display_all  = FALSE;
                display_file = TRUE;
                break;

            case 'G':
                display_all            = FALSE;
                display_group_metadata = TRUE;
                break;

            case 'g':
                display_all   = FALSE;
                display_group = TRUE;
                break;

            case 'l':
                if (opt_arg) {
                    sgroups_threshold = HDatoi(opt_arg);
                    if (sgroups_threshold < 1) {
                        error_msg("Invalid threshold for small groups\n");
                        goto error;
                    }
                }
                else
                    error_msg("Missing threshold for small groups\n");

                break;

            case 'D':
                display_all           = FALSE;
                display_dset_metadata = TRUE;
                break;

            case 'd':
                display_all  = FALSE;
                display_dset = TRUE;
                break;

            case 'm':
                if (opt_arg) {
                    sdsets_threshold = HDatoi(opt_arg);
                    if (sdsets_threshold < 1) {
                        error_msg("Invalid threshold for small datasets\n");
                        goto error;
                    }
                }
                else
                    error_msg("Missing threshold for small datasets\n");

                break;

            case 'T':
                display_all             = FALSE;
                display_dset_dtype_meta = TRUE;
                break;

            case 'A':
                display_all  = FALSE;
                display_attr = TRUE;
                break;

            case 'a':
                if (opt_arg) {
                    sattrs_threshold = HDatoi(opt_arg);
                    if (sattrs_threshold < 1) {
                        error_msg("Invalid threshold for small # of attributes\n");
                        goto error;
                    }
                }
                else
                    error_msg("Missing threshold for small # of attributes\n");

                break;

            case 's':
                display_all           = FALSE;
                display_free_sections = TRUE;
                break;

            case 'S':
                display_all     = FALSE;
                display_summary = TRUE;
                break;

            case 'O':
                display_all    = FALSE;
                display_object = TRUE;

                /* Allocate space to hold the command line info */
                if (NULL == (hand = (struct handler_t *)HDcalloc((size_t)1, sizeof(struct handler_t)))) {
                    error_msg("unable to allocate memory for object struct\n");
                    goto error;
                } /* end if */

                /* Allocate space to hold the object strings */
                hand->obj_count = (size_t)argc;
                if (NULL == (hand->obj = (char **)HDcalloc((size_t)argc, sizeof(char *)))) {
                    error_msg("unable to allocate memory for object array\n");
                    goto error;
                } /* end if */

                /* Store object names */
                for (u = 0; u < hand->obj_count; u++)
                    if (NULL == (hand->obj[u] = HDstrdup(opt_arg))) {
                        error_msg("unable to allocate memory for object name\n");
                        goto error;
                    } /* end if */
                break;

            case 'w':
#ifdef H5_HAVE_ROS3_VFD
                if (h5tools_parse_ros3_fapl_tuple(opt_arg, ',', &ros3_fa) < 0) {
                    error_msg("failed to parse S3 VFD credential info\n");
                    goto error;
                }

                drivername = drivernames[ROS3_VFD_IDX];
#else
                error_msg("Read-Only S3 VFD not enabled.\n");
                goto error;
#endif
                break;

            case 'H':
#ifdef H5_HAVE_LIBHDFS
                if (h5tools_parse_hdfs_fapl_tuple(opt_arg, ',', &hdfs_fa) < 0) {
                    error_msg("failed to parse HDFS VFD configuration info\n");
                    goto error;
                }

                drivername = drivernames[HDFS_VFD_IDX];
#else
                error_msg("HDFS VFD not enabled.\n");
                goto error;
#endif
                break;

            default:
                usage(h5tools_getprogname());
                goto error;
        } /* end switch */
    }     /* end while */

    /* check for file name to be processed */
    if (argc <= opt_ind) {
        error_msg("missing file name\n");
        usage(h5tools_getprogname());
        goto error;
    } /* end if */

    /* Set handler structure */
    *hand_ret = hand;

done:
    return 0;

error:
    hand_free(hand);
    h5tools_setstatus(EXIT_FAILURE);

    return -1;
}

/*-------------------------------------------------------------------------
 * Function: iter_free
 *
 * Purpose: Free iter structure
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 *-------------------------------------------------------------------------
 */
static void
iter_free(iter_t *iter)
{

    /* Clear array of bins for group counts */
    if (iter->group_bins) {
        HDfree(iter->group_bins);
        iter->group_bins = NULL;
    } /* end if */

    /* Clear array for tracking small groups */
    if (iter->num_small_groups) {
        HDfree(iter->num_small_groups);
        iter->num_small_groups = NULL;
    } /* end if */

    /* Clear array of bins for attribute counts */
    if (iter->attr_bins) {
        HDfree(iter->attr_bins);
        iter->attr_bins = NULL;
    } /* end if */

    /* Clear array for tracking small attributes */
    if (iter->num_small_attrs) {
        HDfree(iter->num_small_attrs);
        iter->num_small_attrs = NULL;
    } /* end if */

    /* Clear dataset datatype information found */
    if (iter->dset_type_info) {
        HDfree(iter->dset_type_info);
        iter->dset_type_info = NULL;
    } /* end if */

    /* Clear array of bins for dataset dimensions */
    if (iter->dset_dim_bins) {
        HDfree(iter->dset_dim_bins);
        iter->dset_dim_bins = NULL;
    } /* end if */

    /* Clear array of tracking 1-D small datasets */
    if (iter->small_dset_dims) {
        HDfree(iter->small_dset_dims);
        iter->small_dset_dims = NULL;
    } /* end if */

    /* Clear array of bins for free-space section sizes */
    if (iter->sect_bins) {
        HDfree(iter->sect_bins);
        iter->sect_bins = NULL;
    } /* end if */
} /* end iter_free() */

/*-------------------------------------------------------------------------
 * Function: print_file_info
 *
 * Purpose: Prints information about file
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Saturday, August 12, 2006
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_file_info(const iter_t *iter)
{
    HDprintf("File information\n");
    HDprintf("\t# of unique groups: %lu\n", iter->uniq_groups);
    HDprintf("\t# of unique datasets: %lu\n", iter->uniq_dsets);
    HDprintf("\t# of unique named datatypes: %lu\n", iter->uniq_dtypes);
    HDprintf("\t# of unique links: %lu\n", iter->uniq_links);
    HDprintf("\t# of unique other: %lu\n", iter->uniq_others);
    HDprintf("\tMax. # of links to object: %lu\n", iter->max_links);
    HDfprintf(stdout, "\tMax. # of objects in group: %" PRIuHSIZE "\n", iter->max_fanout);

    return 0;
} /* print_file_info() */

/*-------------------------------------------------------------------------
 * Function: print_file_metadata
 *
 * Purpose: Prints file space information for file's metadata
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Saturday, August 12, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_file_metadata(const iter_t *iter)
{
    HDfprintf(stdout, "File space information for file metadata (in bytes):\n");
    HDfprintf(stdout, "\tSuperblock: %" PRIuHSIZE "\n", iter->super_size);
    HDfprintf(stdout, "\tSuperblock extension: %" PRIuHSIZE "\n", iter->super_ext_size);
    HDfprintf(stdout, "\tUser block: %" PRIuHSIZE "\n", iter->ublk_size);

    HDfprintf(stdout, "\tObject headers: (total/unused)\n");
    HDfprintf(stdout, "\t\tGroups: %" PRIuHSIZE "/%" PRIuHSIZE "\n", iter->group_ohdr_info.total_size,
              iter->group_ohdr_info.free_size);
    HDfprintf(stdout, "\t\tDatasets(exclude compact data): %" PRIuHSIZE "/%" PRIuHSIZE "\n",
              iter->dset_ohdr_info.total_size, iter->dset_ohdr_info.free_size);
    HDfprintf(stdout, "\t\tDatatypes: %" PRIuHSIZE "/%" PRIuHSIZE "\n", iter->dtype_ohdr_info.total_size,
              iter->dtype_ohdr_info.free_size);

    HDfprintf(stdout, "\tGroups:\n");
    HDfprintf(stdout, "\t\tB-tree/List: %" PRIuHSIZE "\n", iter->groups_btree_storage_size);
    HDfprintf(stdout, "\t\tHeap: %" PRIuHSIZE "\n", iter->groups_heap_storage_size);

    HDfprintf(stdout, "\tAttributes:\n");
    HDfprintf(stdout, "\t\tB-tree/List: %" PRIuHSIZE "\n", iter->attrs_btree_storage_size);
    HDfprintf(stdout, "\t\tHeap: %" PRIuHSIZE "\n", iter->attrs_heap_storage_size);

    HDfprintf(stdout, "\tChunked datasets:\n");
    HDfprintf(stdout, "\t\tIndex: %" PRIuHSIZE "\n", iter->datasets_index_storage_size);

    HDfprintf(stdout, "\tDatasets:\n");
    HDfprintf(stdout, "\t\tHeap: %" PRIuHSIZE "\n", iter->datasets_heap_storage_size);

    HDfprintf(stdout, "\tShared Messages:\n");
    HDfprintf(stdout, "\t\tHeader: %" PRIuHSIZE "\n", iter->SM_hdr_storage_size);
    HDfprintf(stdout, "\t\tB-tree/List: %" PRIuHSIZE "\n", iter->SM_index_storage_size);
    HDfprintf(stdout, "\t\tHeap: %" PRIuHSIZE "\n", iter->SM_heap_storage_size);

    HDfprintf(stdout, "\tFree-space managers:\n");
    HDfprintf(stdout, "\t\tHeader: %" PRIuHSIZE "\n", iter->free_hdr);
    HDfprintf(stdout, "\t\tAmount of free space: %" PRIuHSIZE "\n", iter->free_space);

    return 0;
} /* print_file_metadata() */

/*-------------------------------------------------------------------------
 * Function: print_group_info
 *
 * Purpose: Prints information about groups in the file
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Saturday, August 12, 2006
 *
 * Modifications:
 *  bug #1253; Oct 6th 2008; Vailin Choi
 *  Fixed segmentation fault: print iter->group_bins[0] when
 *  there is iter->group_nbins
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_group_info(const iter_t *iter)
{
    unsigned long power; /* Temporary "power" for bins */
    unsigned long total; /* Total count for various statistics */
    unsigned      u;     /* Local index variable */

    HDprintf("Small groups (with 0 to %u links):\n", sgroups_threshold - 1);
    total = 0;
    for (u = 0; u < (unsigned)sgroups_threshold; u++) {
        if (iter->num_small_groups[u] > 0) {
            HDprintf("\t# of groups with %u link(s): %lu\n", u, iter->num_small_groups[u]);
            total += iter->num_small_groups[u];
        } /* end if */
    }     /* end for */
    HDprintf("\tTotal # of small groups: %lu\n", total);

    HDprintf("Group bins:\n");
    total = 0;
    if ((iter->group_nbins > 0) && (iter->group_bins[0] > 0)) {
        HDprintf("\t# of groups with 0 link: %lu\n", iter->group_bins[0]);
        total = iter->group_bins[0];
    } /* end if */
    power = 1;
    for (u = 1; u < iter->group_nbins; u++) {
        if (iter->group_bins[u] > 0) {
            HDprintf("\t# of groups with %lu - %lu links: %lu\n", power, (power * 10) - 1,
                     iter->group_bins[u]);
            total += iter->group_bins[u];
        } /* end if */
        power *= 10;
    } /* end for */
    HDprintf("\tTotal # of groups: %lu\n", total);

    return 0;
} /* print_group_info() */

/*-------------------------------------------------------------------------
 * Function: print_group_metadata
 *
 * Purpose: Prints file space information for groups' metadata
 *
 * Return:  Success: 0
 *          Failure: Never fails
 *
 * Programmer: Vailin Choi; October 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_group_metadata(const iter_t *iter)
{
    HDprintf("File space information for groups' metadata (in bytes):\n");

    HDfprintf(stdout, "\tObject headers (total/unused): %" PRIuHSIZE "/%" PRIuHSIZE "\n",
              iter->group_ohdr_info.total_size, iter->group_ohdr_info.free_size);

    HDfprintf(stdout, "\tB-tree/List: %" PRIuHSIZE "\n", iter->groups_btree_storage_size);
    HDfprintf(stdout, "\tHeap: %" PRIuHSIZE "\n", iter->groups_heap_storage_size);

    return 0;
} /* print_group_metadata() */

/*-------------------------------------------------------------------------
 * Function: print_dataset_info
 *
 * Purpose: Prints information about datasets in the file
 *
 * Return:  Success: 0
 *          Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Saturday, August 12, 2006
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_dataset_info(const iter_t *iter)
{
    unsigned long power; /* Temporary "power" for bins */
    unsigned long total; /* Total count for various statistics */
    unsigned      u;     /* Local index variable */

    if (iter->uniq_dsets > 0) {
        HDprintf("Dataset dimension information:\n");
        HDprintf("\tMax. rank of datasets: %u\n", iter->max_dset_rank);
        HDprintf("\tDataset ranks:\n");
        for (u = 0; u < H5S_MAX_RANK; u++)
            if (iter->dset_rank_count[u] > 0)
                HDprintf("\t\t# of dataset with rank %u: %lu\n", u, iter->dset_rank_count[u]);

        HDprintf("1-D Dataset information:\n");
        HDfprintf(stdout, "\tMax. dimension size of 1-D datasets: %" PRIuHSIZE "\n", iter->max_dset_dims);
        HDprintf("\tSmall 1-D datasets (with dimension sizes 0 to %u):\n", sdsets_threshold - 1);
        total = 0;
        for (u = 0; u < (unsigned)sdsets_threshold; u++) {
            if (iter->small_dset_dims[u] > 0) {
                HDprintf("\t\t# of datasets with dimension sizes %u: %lu\n", u, iter->small_dset_dims[u]);
                total += iter->small_dset_dims[u];
            } /* end if */
        }     /* end for */
        HDprintf("\t\tTotal # of small datasets: %lu\n", total);

        /* Protect against no datasets in file */
        if (iter->dset_dim_nbins > 0) {
            HDprintf("\t1-D Dataset dimension bins:\n");
            total = 0;
            if (iter->dset_dim_bins[0] > 0) {
                HDprintf("\t\t# of datasets with dimension size 0: %lu\n", iter->dset_dim_bins[0]);
                total = iter->dset_dim_bins[0];
            } /* end if */
            power = 1;
            for (u = 1; u < iter->dset_dim_nbins; u++) {
                if (iter->dset_dim_bins[u] > 0) {
                    HDprintf("\t\t# of datasets with dimension size %lu - %lu: %lu\n", power,
                             (power * 10) - 1, iter->dset_dim_bins[u]);
                    total += iter->dset_dim_bins[u];
                } /* end if */
                power *= 10;
            } /* end for */
            HDprintf("\t\tTotal # of datasets: %lu\n", total);
        } /* end if */

        HDprintf("Dataset storage information:\n");
        HDfprintf(stdout, "\tTotal raw data size: %" PRIuHSIZE "\n", iter->dset_storage_size);
        HDfprintf(stdout, "\tTotal external raw data size: %" PRIuHSIZE "\n",
                  iter->dset_external_storage_size);

        HDprintf("Dataset layout information:\n");
        for (u = 0; u < H5D_NLAYOUTS; u++)
            HDprintf("\tDataset layout counts[%s]: %lu\n",
                     (u == H5D_COMPACT
                          ? "COMPACT"
                          : (u == H5D_CONTIGUOUS ? "CONTIG" : (u == H5D_CHUNKED ? "CHUNKED" : "VIRTUAL"))),
                     iter->dset_layouts[u]);
        HDprintf("\tNumber of external files : %lu\n", iter->nexternal);

        HDprintf("Dataset filters information:\n");
        HDprintf("\tNumber of datasets with:\n");
        HDprintf("\t\tNO filter: %lu\n", iter->dset_comptype[H5Z_FILTER_ERROR + 1]);
        HDprintf("\t\tGZIP filter: %lu\n", iter->dset_comptype[H5Z_FILTER_DEFLATE]);
        HDprintf("\t\tSHUFFLE filter: %lu\n", iter->dset_comptype[H5Z_FILTER_SHUFFLE]);
        HDprintf("\t\tFLETCHER32 filter: %lu\n", iter->dset_comptype[H5Z_FILTER_FLETCHER32]);
        HDprintf("\t\tSZIP filter: %lu\n", iter->dset_comptype[H5Z_FILTER_SZIP]);
        HDprintf("\t\tNBIT filter: %lu\n", iter->dset_comptype[H5Z_FILTER_NBIT]);
        HDprintf("\t\tSCALEOFFSET filter: %lu\n", iter->dset_comptype[H5Z_FILTER_SCALEOFFSET]);
        HDprintf("\t\tUSER-DEFINED filter: %lu\n", iter->dset_comptype[H5_NFILTERS_IMPL - 1]);
    } /* end if */

    return 0;
} /* print_dataset_info() */

/*-------------------------------------------------------------------------
 * Function: print_dataset_metadata
 *
 * Purpose: Prints file space information for datasets' metadata
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer:  Vailin Choi; October 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_dset_metadata(const iter_t *iter)
{
    HDprintf("File space information for datasets' metadata (in bytes):\n");

    HDfprintf(stdout, "\tObject headers (total/unused): %" PRIuHSIZE "/%" PRIuHSIZE "\n",
              iter->dset_ohdr_info.total_size, iter->dset_ohdr_info.free_size);

    HDfprintf(stdout, "\tIndex for Chunked datasets: %" PRIuHSIZE "\n", iter->datasets_index_storage_size);
    HDfprintf(stdout, "\tHeap: %" PRIuHSIZE "\n", iter->datasets_heap_storage_size);

    return 0;
} /* print_dset_metadata() */

/*-------------------------------------------------------------------------
 * Function: print_dset_dtype_meta
 *
 * Purpose: Prints datasets' datatype information
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Vailin Choi; October 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_dset_dtype_meta(const iter_t *iter)
{
    unsigned long total;      /* Total count for various statistics */
    size_t        dtype_size; /* Size of encoded datatype */
    unsigned      u;          /* Local index variable */

    if (iter->dset_ntypes) {
        HDprintf("Dataset datatype information:\n");
        HDprintf("\t# of unique datatypes used by datasets: %lu\n", iter->dset_ntypes);
        total = 0;
        for (u = 0; u < iter->dset_ntypes; u++) {
            H5Tencode(iter->dset_type_info[u].tid, NULL, &dtype_size);
            HDprintf("\tDataset datatype #%u:\n", u);
            HDprintf("\t\tCount (total/named) = (%lu/%lu)\n", iter->dset_type_info[u].count,
                     iter->dset_type_info[u].named);
            HDprintf("\t\tSize (desc./elmt) = (%lu/%lu)\n", (unsigned long)dtype_size,
                     (unsigned long)H5Tget_size(iter->dset_type_info[u].tid));
            H5Tclose(iter->dset_type_info[u].tid);
            total += iter->dset_type_info[u].count;
        } /* end for */
        HDprintf("\tTotal dataset datatype count: %lu\n", total);
    } /* end if */

    return 0;
} /* print_dset_dtype_meta() */

/*-------------------------------------------------------------------------
 * Function: print_attr_info
 *
 * Purpose: Prints information about attributes in the file
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Vailin Choi
 *             July 12, 2007
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_attr_info(const iter_t *iter)
{
    unsigned long power; /* Temporary "power" for bins */
    unsigned long total; /* Total count for various statistics */
    unsigned      u;     /* Local index variable */

    HDprintf("Small # of attributes (objects with 1 to %u attributes):\n", sattrs_threshold);
    total = 0;
    for (u = 1; u <= (unsigned)sattrs_threshold; u++) {
        if (iter->num_small_attrs[u] > 0) {
            HDprintf("\t# of objects with %u attributes: %lu\n", u, iter->num_small_attrs[u]);
            total += iter->num_small_attrs[u];
        } /* end if */
    }     /* end for */
    HDprintf("\tTotal # of objects with small # of attributes: %lu\n", total);

    HDprintf("Attribute bins:\n");
    total = 0;
    power = 1;
    for (u = 1; u < iter->attr_nbins; u++) {
        if (iter->attr_bins[u] > 0) {
            HDprintf("\t# of objects with %lu - %lu attributes: %lu\n", power, (power * 10) - 1,
                     iter->attr_bins[u]);
            total += iter->attr_bins[u];
        } /* end if */
        power *= 10;
    } /* end for */
    HDprintf("\tTotal # of objects with attributes: %lu\n", total);
    HDprintf("\tMax. # of attributes to objects: %lu\n", (unsigned long)iter->max_attrs);

    return 0;
} /* print_attr_info() */

/*-------------------------------------------------------------------------
 * Function: print_freespace_info
 *
 * Purpose: Prints information about free space in the file
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Vailin Choi; July 7th, 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_freespace_info(const iter_t *iter)
{
    unsigned long power; /* Temporary "power" for bins */
    unsigned long total; /* Total count for various statistics */
    unsigned      u;     /* Local index variable */

    HDfprintf(stdout, "Free-space persist: %s\n", iter->fs_persist ? "TRUE" : "FALSE");
    HDfprintf(stdout, "Free-space section threshold: %" PRIuHSIZE " bytes\n", iter->fs_threshold);
    HDprintf("Small size free-space sections (< %u bytes):\n", (unsigned)SIZE_SMALL_SECTS);
    total = 0;
    for (u = 0; u < SIZE_SMALL_SECTS; u++) {
        if (iter->num_small_sects[u] > 0) {
            HDprintf("\t# of sections of size %u: %lu\n", u, iter->num_small_sects[u]);
            total += iter->num_small_sects[u];
        } /* end if */
    }     /* end for */
    HDprintf("\tTotal # of small size sections: %lu\n", total);

    HDprintf("Free-space section bins:\n");

    total = 0;
    power = 1;
    for (u = 1; u < iter->sect_nbins; u++) {
        if (iter->sect_bins[u] > 0) {
            HDprintf("\t# of sections of size %lu - %lu: %lu\n", power, (power * 10) - 1, iter->sect_bins[u]);
            total += iter->sect_bins[u];
        } /* end if */
        power *= 10;
    } /* end for */
    HDprintf("\tTotal # of sections: %lu\n", total);

    return 0;
} /* print_freespace_info() */

/*-------------------------------------------------------------------------
 * Function: print_storage_summary
 *
 * Purpose: Prints file space information for the file
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Vailin Choi; August 2009
 *
 *-------------------------------------------------------------------------
 */
static herr_t
print_storage_summary(const iter_t *iter)
{
    hsize_t total_meta = 0;
    hsize_t unaccount  = 0;
    double  percent    = 0.0f;

    HDfprintf(stdout, "File space management strategy: %s\n", FS_STRATEGY_NAME[iter->fs_strategy]);
    HDfprintf(stdout, "File space page size: %" PRIuHSIZE " bytes\n", iter->fsp_size);
    HDprintf("Summary of file space information:\n");
    total_meta =
        iter->super_size + iter->super_ext_size + iter->ublk_size + iter->group_ohdr_info.total_size +
        iter->dset_ohdr_info.total_size + iter->dtype_ohdr_info.total_size + iter->groups_btree_storage_size +
        iter->groups_heap_storage_size + iter->attrs_btree_storage_size + iter->attrs_heap_storage_size +
        iter->datasets_index_storage_size + iter->datasets_heap_storage_size + iter->SM_hdr_storage_size +
        iter->SM_index_storage_size + iter->SM_heap_storage_size + iter->free_hdr;

    HDfprintf(stdout, "  File metadata: %" PRIuHSIZE " bytes\n", total_meta);
    HDfprintf(stdout, "  Raw data: %" PRIuHSIZE " bytes\n", iter->dset_storage_size);

    percent = ((double)iter->free_space / (double)iter->filesize) * (double)100.0f;
    HDfprintf(stdout, "  Amount/Percent of tracked free space: %" PRIuHSIZE " bytes/%3.1f%%\n",
              iter->free_space, percent);

    if (iter->filesize < (total_meta + iter->dset_storage_size + iter->free_space)) {
        unaccount = (total_meta + iter->dset_storage_size + iter->free_space) - iter->filesize;
        HDfprintf(stdout, "  ??? File has %" PRIuHSIZE " more bytes accounted for than its size! ???\n",
                  unaccount);
    }
    else {
        unaccount = iter->filesize - (total_meta + iter->dset_storage_size + iter->free_space);
        HDfprintf(stdout, "  Unaccounted space: %" PRIuHSIZE " bytes\n", unaccount);
    }

    HDfprintf(stdout, "Total space: %" PRIuHSIZE " bytes\n",
              total_meta + iter->dset_storage_size + iter->free_space + unaccount);

    if (iter->nexternal)
        HDfprintf(stdout, "External raw data: %" PRIuHSIZE " bytes\n", iter->dset_external_storage_size);

    return 0;
} /* print_storage_summary() */

/*-------------------------------------------------------------------------
 * Function: print_file_statistics
 *
 * Purpose: Prints file statistics
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Saturday, August 12, 2006
 *
 *-------------------------------------------------------------------------
 */
static void
print_file_statistics(const iter_t *iter)
{
    if (display_all) {
        display_file            = TRUE;
        display_group           = TRUE;
        display_dset            = TRUE;
        display_dset_dtype_meta = TRUE;
        display_attr            = TRUE;
        display_free_sections   = TRUE;
        display_summary         = TRUE;

        display_file_metadata  = TRUE;
        display_group_metadata = TRUE;
        display_dset_metadata  = TRUE;
    }

    if (display_file)
        print_file_info(iter);
    if (display_file_metadata)
        print_file_metadata(iter);

    if (display_group)
        print_group_info(iter);
    if (!display_all && display_group_metadata)
        print_group_metadata(iter);

    if (display_dset)
        print_dataset_info(iter);
    if (display_dset_dtype_meta)
        print_dset_dtype_meta(iter);
    if (!display_all && display_dset_metadata)
        print_dset_metadata(iter);

    if (display_attr)
        print_attr_info(iter);
    if (display_free_sections)
        print_freespace_info(iter);
    if (display_summary)
        print_storage_summary(iter);
} /* print_file_statistics() */

/*-------------------------------------------------------------------------
 * Function: print_object_statistics
 *
 * Purpose: Prints object statistics
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Thursday, August 17, 2006
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void
print_object_statistics(const char *name)
{
    HDprintf("Object name %s\n", name);
} /* print_object_statistics() */

/*-------------------------------------------------------------------------
 * Function: print_statistics
 *
 * Purpose: Prints statistics
 *
 * Return: Success: 0
 *
 * Failure: Never fails
 *
 * Programmer: Elena Pourmal
 *             Thursday, August 17, 2006
 *
 * Modifications:
 *
 *-------------------------------------------------------------------------
 */
static void
print_statistics(const char *name, const iter_t *iter)
{
    if (display_object)
        print_object_statistics(name);
    else
        print_file_statistics(iter);
} /* print_statistics() */

/*-------------------------------------------------------------------------
 * Function: main
 *
 * Modifications:
 *      2/2010; Vailin Choi
 *      Get the size of user block
 *
 *-------------------------------------------------------------------------
 */
int
main(int argc, const char *argv[])
{
    iter_t            iter;
    const char *      fname   = NULL;
    hid_t             fid     = H5I_INVALID_HID;
    struct handler_t *hand    = NULL;
    hid_t             fapl_id = H5P_DEFAULT;

    h5tools_setprogname(PROGRAMNAME);
    h5tools_setstatus(EXIT_SUCCESS);

    /* Initialize h5tools lib */
    h5tools_init();

    HDmemset(&iter, 0, sizeof(iter));

    if (parse_command_line(argc, argv, &hand) < 0)
        goto done;

    /* enable error reporting if command line option */
    h5tools_error_report();

    if (drivername) {
        h5tools_vfd_info_t vfd_info;

        vfd_info.info = NULL;
        vfd_info.name = drivername;

        if (!HDstrcmp(drivername, drivernames[ROS3_VFD_IDX])) {
#ifdef H5_HAVE_ROS3_VFD
            vfd_info.info = (void *)&ros3_fa;
#else
            error_msg("Read-Only S3 VFD not enabled.\n");
            goto done;
#endif
        }
        else if (!HDstrcmp(drivername, drivernames[HDFS_VFD_IDX])) {
#ifdef H5_HAVE_LIBHDFS
            vfd_info.info = (void *)&hdfs_fa;
#else
            error_msg("HDFS VFD not enabled.\n");
            goto done;
#endif
        }

        if ((fapl_id = h5tools_get_fapl(H5P_DEFAULT, NULL, &vfd_info)) < 0) {
            error_msg("Unable to create FAPL for file access\n");
            goto done;
        }
    }

    fname = argv[opt_ind];

    /* Check for filename given */
    if (fname) {
        hid_t       fcpl;
        H5F_info2_t finfo;

        HDprintf("Filename: %s\n", fname);

        fid = h5tools_fopen(fname, H5F_ACC_RDONLY, fapl_id, (fapl_id == H5P_DEFAULT) ? FALSE : TRUE, NULL, 0);

        if (fid < 0) {
            error_msg("unable to open file \"%s\"\n", fname);
            h5tools_setstatus(EXIT_FAILURE);
            goto done;
        } /* end if */

        /* Initialize iter structure */
        iter.fid = fid;

        if (H5Fget_filesize(fid, &iter.filesize) < 0)
            warn_msg("Unable to retrieve file size\n");
        HDassert(iter.filesize != 0);

        /* Get storge info for file-level structures */
        if (H5Fget_info2(fid, &finfo) < 0)
            warn_msg("Unable to retrieve file info\n");
        else {
            iter.super_size            = finfo.super.super_size;
            iter.super_ext_size        = finfo.super.super_ext_size;
            iter.SM_hdr_storage_size   = finfo.sohm.hdr_size;
            iter.SM_index_storage_size = finfo.sohm.msgs_info.index_size;
            iter.SM_heap_storage_size  = finfo.sohm.msgs_info.heap_size;
            iter.free_space            = finfo.free.tot_space;
            iter.free_hdr              = finfo.free.meta_size;
        } /* end else */

        iter.num_small_groups = (unsigned long *)HDcalloc((size_t)sgroups_threshold, sizeof(unsigned long));
        iter.num_small_attrs =
            (unsigned long *)HDcalloc((size_t)(sattrs_threshold + 1), sizeof(unsigned long));
        iter.small_dset_dims = (unsigned long *)HDcalloc((size_t)sdsets_threshold, sizeof(unsigned long));

        if (iter.num_small_groups == NULL || iter.num_small_attrs == NULL || iter.small_dset_dims == NULL) {
            error_msg("Unable to allocate memory for tracking small groups/datasets/attributes\n");
            h5tools_setstatus(EXIT_FAILURE);
            goto done;
        }

        if ((fcpl = H5Fget_create_plist(fid)) < 0)
            warn_msg("Unable to retrieve file creation property\n");

        if (H5Pget_userblock(fcpl, &iter.ublk_size) < 0)
            warn_msg("Unable to retrieve userblock size\n");

        if (H5Pget_file_space_strategy(fcpl, &iter.fs_strategy, &iter.fs_persist, &iter.fs_threshold) < 0)
            warn_msg("Unable to retrieve file space information\n");
        HDassert(iter.fs_strategy >= 0 && iter.fs_strategy < H5F_FSPACE_STRATEGY_NTYPES);

        if (H5Pget_file_space_page_size(fcpl, &iter.fsp_size) < 0)
            warn_msg("Unable to retrieve file space page size\n");

        /* get information for free-space sections */
        if (freespace_stats(fid, &iter) < 0)
            warn_msg("Unable to retrieve freespace info\n");

        /* Walk the objects or all file */
        if (display_object) {
            unsigned u;

            for (u = 0; u < hand->obj_count; u++) {
                if (h5trav_visit(fid, hand->obj[u], TRUE, TRUE, obj_stats, lnk_stats, &iter, H5O_INFO_ALL) <
                    0) {
                    error_msg("unable to traverse object \"%s\"\n", hand->obj[u]);
                    h5tools_setstatus(EXIT_FAILURE);
                }
                else
                    print_statistics(hand->obj[u], &iter);
            } /* end for */
        }     /* end if */
        else {
            if (h5trav_visit(fid, "/", TRUE, TRUE, obj_stats, lnk_stats, &iter, H5O_INFO_ALL) < 0) {
                error_msg("unable to traverse objects/links in file \"%s\"\n", fname);
                h5tools_setstatus(EXIT_FAILURE);
            }
            else
                print_statistics("/", &iter);
        } /* end else */
    }     /* end if */

done:
    hand_free(hand);

    /* Free iter structure */
    iter_free(&iter);

    if (fapl_id != H5P_DEFAULT) {
        if (H5Pclose(fapl_id) < 0) {
            error_msg("unable to close fapl entry\n");
            h5tools_setstatus(EXIT_FAILURE);
        }
    }

    if (fid >= 0 && H5Fclose(fid) < 0) {
        error_msg("unable to close file \"%s\"\n", fname);
        h5tools_setstatus(EXIT_FAILURE);
    } /* end if */

    leave(h5tools_getstatus());
} /* end main() */