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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * 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 files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic HDF5 document set and *
+ * is linked from the top-level documents page. It can also be found at *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
+ * access to either file, you may request a copy from help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created: swmr_remove_reader.c
+ *
+ * Purpose: Reads data from a randomly selected subset of the datasets
+ * in the SWMR test file. Unlike the regular reader, these
+ * datasets will be shrinking.
+ *
+ * This program is intended to run concurrently with the
+ * swmr_remove_writer program.
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/***********/
+/* Headers */
+/***********/
+
+#include "h5test.h"
+#include "swmr_common.h"
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+static hid_t symbol_tid = -1;
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static int check_dataset(hid_t fid, unsigned verbose, const char *sym_name,
+ symbol_t *record, hid_t rec_sid);
+static int read_records(const char *filename, unsigned verbose, unsigned long nseconds,
+ unsigned poll_time, unsigned ncommon, unsigned nrandom);
+static void usage(void);
+
+
+/*-------------------------------------------------------------------------
+ * Function: check_dataset
+ *
+ * Purpose: For a given dataset, checks to make sure that the stated
+ * and actual sizes are the same. If they are not, then
+ * we have an inconsistent dataset due to a SWMR error.
+ *
+ * Parameters: hid_t fid
+ * The SWMR test file's ID.
+ *
+ * unsigned verbose
+ * Whether verbose console output is desired.
+ *
+ * const char *sym_name
+ * The name of the dataset from which to read.
+ *
+ * symbol_t *record
+ * Memory for the record. Must be pre-allocated.
+ *
+ * hid_t rec_sid
+ * The memory dataspace for access. It's always the same so
+ * there is no need to re-create it every time this function
+ * is called.
+ *
+ * Return: Success: 0
+ * Failure: -1
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+check_dataset(hid_t fid, unsigned verbose, const char *sym_name, symbol_t *record,
+ hid_t rec_sid)
+{
+ hid_t dsid; /* Dataset ID */
+ hid_t file_sid; /* Dataset's space ID */
+ hssize_t snpoints; /* Number of elements in dataset */
+ hsize_t start[2] = {0, 0}, count[2] = {1, 1}; /* Hyperslab selection values */
+
+ HDassert(fid >= 0);
+ HDassert(sym_name);
+ HDassert(record);
+ HDassert(rec_sid >= 0);
+
+ /* Open dataset for symbol */
+ if((dsid = H5Dopen2(fid, sym_name, H5P_DEFAULT)) < 0)
+ return -1;
+
+ /* Get the dataset's dataspace */
+ if((file_sid = H5Dget_space(dsid)) < 0)
+ return -1;
+
+ /* Get the number of elements (= records, for 1-D datasets) */
+ if((snpoints = H5Sget_simple_extent_npoints(file_sid)) < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Symbol = '%s', # of records = %lld\n", sym_name, (long long)snpoints);
+
+ /* Check if there are records for symbol */
+ if(snpoints > 0) {
+ /* Choose a random record in the dataset, choosing the last record half
+ * the time */
+ start[1] = (hsize_t)(HDrandom() % (snpoints * 2));
+ if(start[1] > (hsize_t)(snpoints - 1))
+ start[1] = (hsize_t)(snpoints - 1);
+ if(H5Sselect_hyperslab(file_sid, H5S_SELECT_SET, start, NULL, count, NULL) < 0)
+ return -1;
+
+ /* Read record from dataset */
+#ifdef FILLVAL_WORKS
+ /* When shrinking the dataset, we cannot guarantee that the buffer will
+ * even be touched, unless there is a fill value. Since fill values do
+ * not work with SWMR currently (see note in swmr_generator.c), we
+ * simply initialize rec_id to 0. */
+ record->rec_id = (uint64_t)ULLONG_MAX - 1;
+#else /* FILLVAL_WORKS */
+ record->rec_id = (uint64_t)0;
+#endif /* FILLVAL_WORKS */
+ if(H5Dread(dsid, symbol_tid, rec_sid, file_sid, H5P_DEFAULT, record) < 0)
+ return -1;
+
+ /* Verify record value - note that it may be the fill value, because the
+ * chunk may be deleted before the object header has the updated
+ * dimensions */
+ if(record->rec_id != start[1] && record->rec_id != (uint64_t)0) {
+ HDfprintf(stderr, "*** ERROR ***\n");
+ HDfprintf(stderr, "Incorrect record value!\n");
+ HDfprintf(stderr, "Symbol = '%s', # of records = %lld, record->rec_id = %llx\n", sym_name, (long long)snpoints, (unsigned long long)record->rec_id);
+ return -1;
+ } /* end if */
+ } /* end if */
+
+ /* Close the dataset's dataspace */
+ if(H5Sclose(file_sid) < 0)
+ return -1;
+
+ /* Close dataset for symbol */
+ if(H5Dclose(dsid) < 0)
+ return -1;
+
+ return 0;
+} /* end check_dataset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: read_records
+ *
+ * Purpose: For a given dataset, checks to make sure that the stated
+ * and actual sizes are the same. If they are not, then
+ * we have an inconsistent dataset due to a SWMR error.
+ *
+ * The "common" datasets are a random selection from among
+ * the level 0 datasets. The "random" datasets are a random
+ * selection from among all the file's datasets. This scheme
+ * ensures that the level 0 datasets are interrogated vigorously.
+ *
+ * Parameters: const char *filename
+ * The SWMR test file's name.
+ *
+ * unsigned verbose
+ * Whether verbose console output is desired.
+ *
+ * unsigned long nseconds
+ * The amount of time to read records (ns).
+ *
+ * unsigned poll_time
+ * The amount of time to sleep (s).
+ *
+ * unsigned ncommon
+ * The number of common/non-random datasets that will be opened.
+ *
+ * unsigned nrandom
+ * The number of random datasets that will be opened.
+ *
+ * Return: Success: 0
+ * Failure: -1
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+read_records(const char *filename, unsigned verbose, unsigned long nseconds,
+ unsigned poll_time, unsigned ncommon, unsigned nrandom)
+{
+ time_t start_time; /* Starting time */
+ time_t curr_time; /* Current time */
+ symbol_info_t **sym_com = NULL; /* Pointers to array of common dataset IDs */
+ symbol_info_t **sym_rand = NULL; /* Pointers to array of random dataset IDs */
+ hid_t mem_sid; /* Memory dataspace ID */
+ hid_t fid; /* SWMR test file ID */
+ hid_t fapl; /* File access property list */
+ symbol_t record; /* The record to add to the dataset */
+ unsigned v; /* Local index variable */
+
+ HDassert(filename);
+ HDassert(nseconds != 0);
+ HDassert(poll_time != 0);
+
+ /* Reset the record */
+ /* (record's 'info' field might need to change for each record written, also) */
+ HDmemset(&record, 0, sizeof(record));
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Choosing datasets\n");
+
+ /* Allocate space for 'common' datasets, if any */
+ if(ncommon > 0) {
+ /* Allocate array to hold pointers to symbols for common datasets */
+ if(NULL == (sym_com = (symbol_info_t **)HDmalloc(sizeof(symbol_info_t *) * ncommon)))
+ return -1;
+
+ /* Open the common datasets */
+ for(v = 0; v < ncommon; v++) {
+ unsigned offset; /* Offset of symbol to use */
+
+ /* Determine the offset of the symbol, within level 0 symbols */
+ /* (level 0 symbols are the most common symbols) */
+ offset = (unsigned)(HDrandom() % symbol_count[0]);
+ sym_com[v] = &symbol_info[0][offset];
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Common symbol #%u = '%s'\n", v, symbol_info[0][offset].name);
+ } /* end for */
+ } /* end if */
+
+ /* Allocate space for 'random' datasets, if any */
+ if(nrandom > 0) {
+ /* Allocate array to hold pointers to symbols for random datasets */
+ if(NULL == (sym_rand = (symbol_info_t **)HDmalloc(sizeof(symbol_info_t *) * nrandom)))
+ return -1;
+
+ /* Determine the random datasets */
+ for(v = 0; v < nrandom; v++) {
+ symbol_info_t *sym; /* Symbol to use */
+
+ /* Determine the symbol, within all symbols */
+ if(NULL == (sym = choose_dataset()))
+ return -1;
+ sym_rand[v] = sym;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Random symbol #%u = '%s'\n", v, sym->name);
+ } /* end for */
+ } /* end if */
+
+ /* Create a dataspace for the record to read */
+ if((mem_sid = H5Screate(H5S_SCALAR)) < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Reading records\n");
+
+ /* Get the starting time */
+ start_time = HDtime(NULL);
+ curr_time = start_time;
+
+ /* Create file access property list */
+ if((fapl = h5_fileaccess()) < 0)
+ return -1;
+
+ /* Loop over reading records until [at least] the correct # of seconds have passed */
+ while(curr_time < (time_t)(start_time + (time_t)nseconds)) {
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Opening file: %s\n", filename);
+
+ /* Open the file */
+ if((fid = H5Fopen(filename, H5F_ACC_RDONLY | H5F_ACC_SWMR_READ, fapl)) < 0)
+ return -1;
+
+ /* Check 'common' datasets, if any */
+ if(ncommon > 0) {
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Checking common symbols\n");
+
+ /* Iterate over common datasets */
+ for(v = 0; v < ncommon; v++) {
+ /* Check common dataset */
+ if(check_dataset(fid, verbose, sym_com[v]->name, &record, mem_sid) < 0)
+ return -1;
+ HDmemset(&record, 0, sizeof(record));
+ } /* end for */
+ } /* end if */
+
+ /* Check 'random' datasets, if any */
+ if(nrandom > 0) {
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Checking random symbols\n");
+
+ /* Iterate over random datasets */
+ for(v = 0; v < nrandom; v++) {
+ /* Check random dataset */
+ if(check_dataset(fid, verbose, sym_rand[v]->name, &record, mem_sid) < 0)
+ return -1;
+ HDmemset(&record, 0, sizeof(record));
+ } /* end for */
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Closing file\n");
+
+ /* Close the file */
+ if(H5Fclose(fid) < 0)
+ return -1;
+
+ /* Sleep for the appropriate # of seconds */
+ HDsleep(poll_time);
+
+ /* Retrieve the current time */
+ curr_time = HDtime(NULL);
+ } /* end while */
+
+ /* Close the fapl */
+ if(H5Pclose(fapl) < 0)
+ return -1;
+
+ /* Close the memory dataspace */
+ if(H5Sclose(mem_sid) < 0)
+ return -1;
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Closing datasets\n");
+
+ /* Close 'random' datasets, if any */
+ if(nrandom > 0) {
+ /* Release array holding dataset ID's for random datasets */
+ HDfree(sym_rand);
+ } /* end if */
+
+ /* Close 'common' datasets, if any */
+ if(ncommon > 0) {
+ /* Release array holding dataset ID's for common datasets */
+ HDfree(sym_com);
+ } /* end if */
+
+ return 0;
+} /* end read_records() */
+
+static void
+usage(void)
+{
+ printf("\n");
+ printf("Usage error!\n");
+ printf("\n");
+ printf("Usage: swmr_remove_reader [-q] [-s <# of seconds to sleep between\n");
+ printf(" polling>] [-h <# of common symbols to poll>] [-l <# of random symbols\n");
+ printf(" to poll>] [-r <random seed>] <# of seconds to test>\n");
+ printf("\n");
+ printf("Defaults to verbose (no '-q' given), 1 second between polling ('-s 1'),\n");
+ printf("5 common symbols to poll ('-h 5'), 10 random symbols to poll ('-l 10'),\n");
+ printf("and will generate a random seed (no -r given).\n");
+ printf("\n");
+ HDexit(1);
+}
+
+int main(int argc, const char *argv[])
+{
+ long nseconds = 0; /* # of seconds to test */
+ int poll_time = 1; /* # of seconds between polling */
+ int ncommon = 5; /* # of common symbols to poll */
+ int nrandom = 10; /* # of random symbols to poll */
+ unsigned verbose = 1; /* Whether to emit some informational messages */
+ unsigned use_seed = 0; /* Set to 1 if a seed was set on the command line */
+ unsigned random_seed = 0; /* Random # seed */
+ unsigned u; /* Local index variables */
+ int temp;
+
+ /* Parse command line options */
+ if(argc < 2)
+ usage();
+ if(argc > 1) {
+ u = 1;
+ while(u < (unsigned)argc) {
+ if(argv[u][0] == '-') {
+ switch(argv[u][1]) {
+ /* # of common symbols to poll */
+ case 'h':
+ ncommon = HDatoi(argv[u + 1]);
+ if(ncommon < 0)
+ usage();
+ u += 2;
+ break;
+
+ /* # of random symbols to poll */
+ case 'l':
+ nrandom = HDatoi(argv[u + 1]);
+ if(nrandom < 0)
+ usage();
+ u += 2;
+ break;
+
+ /* Be quiet */
+ case 'q':
+ verbose = 0;
+ u++;
+ break;
+
+ /* Random # seed */
+ case 'r':
+ use_seed = 1;
+ temp = HDatoi(argv[u + 1]);
+ if(temp < 0)
+ usage();
+ else
+ random_seed = (unsigned)temp;
+ u += 2;
+ break;
+
+ /* # of seconds between polling */
+ case 's':
+ poll_time = HDatoi(argv[u + 1]);
+ if(poll_time < 0)
+ usage();
+ u += 2;
+ break;
+
+ default:
+ usage();
+ break;
+ } /* end switch */
+ } /* end if */
+ else {
+ /* Get the number of records to append */
+ nseconds = HDatol(argv[u]);
+ if(nseconds <= 0)
+ usage();
+
+ u++;
+ } /* end else */
+ } /* end while */
+ } /* end if */
+ if(nseconds <= 0)
+ usage();
+ if(poll_time >= nseconds)
+ usage();
+
+ /* Emit informational message */
+ if(verbose) {
+ HDfprintf(stderr, "Parameters:\n");
+ HDfprintf(stderr, "\t# of seconds between polling = %d\n", poll_time);
+ HDfprintf(stderr, "\t# of common symbols to poll = %d\n", ncommon);
+ HDfprintf(stderr, "\t# of random symbols to poll = %d\n", nrandom);
+ HDfprintf(stderr, "\t# of seconds to test = %ld\n", nseconds);
+ } /* end if */
+
+ /* Set the random seed */
+ if(0 == use_seed) {
+ struct timeval t;
+ HDgettimeofday(&t, NULL);
+ random_seed = (unsigned)(t.tv_usec);
+ } /* end if */
+ HDsrandom(random_seed);
+ /* ALWAYS emit the random seed for possible debugging */
+ HDfprintf(stderr, "Using reader random seed: %u\n", random_seed);
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Generating symbol names\n");
+
+ /* Generate dataset names */
+ if(generate_symbols() < 0) {
+ HDfprintf(stderr, "Error generating symbol names!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Create datatype for creating datasets */
+ if((symbol_tid = create_symbol_datatype()) < 0)
+ return -1;
+
+ /* Reading records from datasets */
+ if(read_records(FILENAME, verbose, (unsigned long)nseconds, (unsigned)poll_time, (unsigned)ncommon, (unsigned)nrandom) < 0) {
+ HDfprintf(stderr, "Error reading records from datasets!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Releasing symbols\n");
+
+ /* Clean up the symbols */
+ if(shutdown_symbols() < 0) {
+ HDfprintf(stderr, "Error releasing symbols!\n");
+ HDexit(1);
+ } /* end if */
+
+ /* Emit informational message */
+ if(verbose)
+ HDfprintf(stderr, "Closing objects\n");
+
+ /* Close objects created */
+ if(H5Tclose(symbol_tid) < 0) {
+ HDfprintf(stderr, "Error closing symbol datatype!\n");
+ HDexit(1);
+ } /* end if */
+
+ return 0;
+}