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108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*
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Copyright 2018, UCAR/Unidata
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See COPYRIGHT file for copying and redistribution conditions.
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This is part of netCDF.
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This program tests for a bug discovered with nofill mode that failed
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only on file systems with block size in a particular range. It fails
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when invoked with the blksize argument between 2091953 and 2150032,
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inclusive, and succeeds for other blksizes.
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*/
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#include <config.h>
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#include <nc_tests.h>
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#include "err_macros.h"
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#include <stdio.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <netcdf.h>
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#define FILE_NAME "tst_nofill2.nc"
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#define LON_LEN 240
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#define LAT_LEN 121
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#define LVL_LEN 31
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#define TIME_LEN 1
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#define NDIMS1 1
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#define NDIMS4 4
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int
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create_file(char *file_name, int fill_mode, size_t* sizehintp)
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{
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int ncid, time_id, zonal_wnd_id;
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int dimids[NDIMS4];
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size_t start[NDIMS4] = {0, 0, 0, 0};
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size_t count[NDIMS4] = {TIME_LEN, 1, LAT_LEN, LON_LEN};
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float zonal_wnd[LON_LEN * LAT_LEN * TIME_LEN];
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size_t default_initialsize = 0;
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double time[TIME_LEN] = {1.};
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int i;
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/* Init data. */
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for(i = 0; i < TIME_LEN * LAT_LEN * LON_LEN; i++)
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zonal_wnd[i] = 100 + i;
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/* To test bug on filesystem without large block size, we can get
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* the same effect by providing the desired value as sizehint to
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* nc__create() instead of calling nc_create() and getting the
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* block size reported by fstat */
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if (nc__create(file_name, NC_CLOBBER, default_initialsize, sizehintp, &ncid)) ERR;
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if (nc_set_fill(ncid, fill_mode, NULL)) ERR;
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/* define dimensions */
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if (nc_def_dim(ncid, "lon", LON_LEN, &dimids[3])) ERR;
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if (nc_def_dim(ncid, "lat", LAT_LEN, &dimids[2])) ERR;
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if (nc_def_dim(ncid, "lvl", LVL_LEN, &dimids[1])) ERR;
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if (nc_def_dim(ncid, "time", TIME_LEN, &dimids[0])) ERR;
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/* define variables */
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if (nc_def_var(ncid, "time", NC_DOUBLE, NDIMS1, &dimids[0], &time_id)) ERR;
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if (nc_def_var(ncid, "zonal_wnd", NC_FLOAT, NDIMS4, dimids, &zonal_wnd_id)) ERR;
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if (nc_enddef (ncid)) ERR;
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if (nc_put_var_double(ncid, time_id, time)) ERR;
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/* Bug exposed when written in reverse order. */
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for(i = LVL_LEN - 1; i>=0; i--)
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{
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start[1] = i;
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if (nc_put_vara_float(ncid, zonal_wnd_id, start, count, zonal_wnd)) ERR;
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}
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if (nc_close(ncid)) ERR;
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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size_t sizehint = (1750000); /* default if not set on command line,
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* exposes bug. It turns out any
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* value between 2091953 and 2150032
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* triggers bug, whereas all other
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* values work fine. */
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printf("\n*** Testing nofill mode.\n");
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printf("*** Create file in nofill mode, writing all values...");
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{
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#define NUM_TRIES 1
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int ncid;
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size_t idx[1] = {0};
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double data;
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int i;
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for (i = 0; i < NUM_TRIES; i++)
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{
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printf(", trying sizehint of %lu ...", (unsigned long)sizehint);
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if (create_file(FILE_NAME, NC_NOFILL, &sizehint)) ERR;
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if (nc_open(FILE_NAME, 0, &ncid)) ERR;
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if (nc_get_var1(ncid, 0, idx, &data)) ERR;
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if (!data) ERR;
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if (nc_close(ncid)) ERR;
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sizehint += 10000;
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}
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}
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SUMMARIZE_ERR;
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FINAL_RESULTS;
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}
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