--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/tests/write_append_truncate.c
+ *
+ * Each loop does 3 things:
+ * - truncate file to zero (not via ftruncate though, to test O_APPEND)
+ * - write a "chunk" of data (should be at file offset 0 after truncate)
+ * - on each of two threads either append or truncate-up the file
+ *
+ * If the truncate happened first, we should have a hole in the file.
+ * If the append happened first, we should have truncated the file down.
+ *
+ * WRITE_SIZE_MAX and APPEND_SIZE_MAX are large enough to cross a stripe.
+ *
+ * compile: mpicc -g -Wall -o write_append_truncate write_append_truncate.c
+ * run: mpirun -np 2 -machlist <hostlist file> write_append_truncate <file>
+ * or: pdsh -w <two hosts> write_append_truncate <file>
+ * or: prun -n 2 [-N 2] write_append_truncate <file>
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <time.h>
+#include <string.h>
+#include <unistd.h>
+#include <getopt.h>
+#include "mpi.h"
+
+#define DEFAULT_ITER 10000
+
+#define WRITE_SIZE_MAX 1234567
+#define APPEND_SIZE_MAX 1234567
+#define TRUNC_SIZE_MAX 1234567
+
+#define STATUS_FMT "WR %c %7d/%#08x, AP %c %7d/%#08x, TR@ %7d/%#08x"
+
+#define HOSTNAME_SIZE 50
+char hostname[HOSTNAME_SIZE];
+#define FNAMES_MAX 256
+
+void usage(char *prog)
+{
+ printf("usage: %s [-a append_max] [-C] [-n nloops] [-s seed]\n"
+ "\t\t[-t trunc_max] [-T] [-v] [-w write_max] <filename> ...\n", prog);
+ printf("\t-a append_max: maximum size of append, default %u bytes\n",
+ APPEND_SIZE_MAX);
+ printf("\t-C: 'classic' checks (on file 0)\n");
+ printf("\t-n nloops: count of loops to run, default %u\n",DEFAULT_ITER);
+ printf("\t-s seed: random seed to use, default {current time}\n");
+ printf("\t-t trunc_max: maximum size of truncate, default %u bytes\n",
+ TRUNC_SIZE_MAX);
+ printf("\t-T: 'classic' truncates (on file 0)\n");
+ printf("\t-w write_max: maximum size of write, default %u bytes\n",
+ WRITE_SIZE_MAX);
+ printf("\t-W: 'classic' writes (on rank 0, file 0)\n");
+ printf("\t-v: run in verbose mode (repeat for more verbosity)\n");
+ printf("\tfilename for each mountpoint of same filesystem on a node\n");
+ printf("\b%s must be run with at least 2 processes\n", prog);
+
+ MPI_Finalize();
+ exit(1);
+}
+
+/* Print process rank, loop count, message, and exit (i.e. a fatal error) */
+void rprintf(int rank, int loop, int error, const char *fmt, ...)
+__attribute__ ((format (printf, 4, 5)));
+
+void rprintf(int rank, int loop, int error, const char *fmt, ...)
+{
+ va_list ap;
+
+ printf("r=%2u", rank);
+ if (loop >= 0)
+ printf(" l=%04u", loop);
+ if (error != 0)
+ printf(" %s", hostname);
+ printf(": ");
+
+ va_start(ap, fmt);
+
+ vprintf(fmt, ap);
+
+ if (error != 0)
+ MPI_Abort(MPI_COMM_WORLD, error);
+}
+
+int main(int argc, char *argv[])
+{
+ int n, nloops = DEFAULT_ITER;
+ int nfnames = 0, ifnames, fd;
+ int rank = -1, nproc, ret;
+ unsigned write_max = WRITE_SIZE_MAX;
+ unsigned append_max = APPEND_SIZE_MAX;
+ unsigned write_size = 0, append_size = 0, trunc_size = 0;
+ unsigned trunc_max = 0, trunc_offset = 0;
+ char *append_buf;
+ char *write_buf;
+ char *read_buf = NULL;
+ char *trunc_buf = NULL;
+ int seed = time(0);
+ int done;
+ int error;
+ int verbose = 0;
+ int classic_check = 0, classic_trunc = 0, classic_write = 0;
+ char write_char = 'A', append_char = 'a';
+ char *fnames[FNAMES_MAX], *end;
+ char *prog = "write_append_truncate";
+ int c;
+
+ error = MPI_Init(&argc, &argv);
+ if (error != MPI_SUCCESS)
+ printf("%s: MPI_Init failed: %d\n", prog, error);
+ else if (verbose > 2)
+ printf("%s: MPI_Init succeeded\n", prog);
+
+ prog = strrchr(argv[0], '/');
+ if (prog == NULL)
+ prog = argv[0];
+ else
+ prog++;
+
+ while ((c = getopt(argc, argv, "a:cCn:s:t:Tvw:W")) != -1) {
+ switch(c) {
+ case 'a':
+ append_max = strtoul(optarg, &end, 0);
+ if (append_max == 0 || *end) {
+ fprintf(stderr, "%s: bad append option '%s'\n",
+ prog, optarg);
+ usage(prog);
+ }
+ break;
+ case 'C':
+ classic_check++;
+ break;
+ case 'n':
+ nloops = strtoul(optarg, &end, 0);
+ if (nloops == 0 || *end) {
+ fprintf(stderr, "%s: bad nloops option '%s'\n",
+ prog, optarg);
+ usage(prog);
+ }
+ break;
+ case 's':
+ seed = strtoul(optarg, &end, 0);
+ if (*end) {
+ fprintf(stderr, "%s: bad seed option '%s'\n",
+ prog, optarg);
+ usage(prog);
+ }
+ break;
+ case 't':
+ trunc_max = strtoul(optarg, &end, 0);
+ if (*end) {
+ fprintf(stderr,"%s: bad truncate option '%s'\n",
+ prog, optarg);
+ usage(prog);
+ }
+ break;
+ case 'T':
+ classic_trunc++;
+ break;
+ case 'v':
+ verbose++;
+ break;
+ case 'w':
+ write_max = strtoul(optarg, &end, 0);
+ if (write_max == 0 || *end) {
+ fprintf(stderr, "%s: bad write option '%s'\n",
+ prog, optarg);
+ usage(prog);
+ }
+ break;
+ case 'W':
+ classic_write++;
+ break;
+ default:
+ fprintf(stderr, "%s: unknown option '%c'\n", prog, c);
+ usage(prog);
+ }
+ }
+
+ srand(seed);
+
+ if (argc == optind) {
+ fprintf(stderr, "%s: missing filename argument\n", prog);
+ usage(prog);
+ }
+
+ if (argc > optind + FNAMES_MAX) {
+ fprintf(stderr, "%s: too many extra options\n", prog);
+ usage(prog);
+ }
+
+ while (optind < argc)
+ fnames[nfnames++] = argv[optind++];
+
+ error = MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+ if (verbose > 2 || error != MPI_SUCCESS)
+ rprintf(rank, -1, error != MPI_SUCCESS, "MPI_Comm_rank: %d\n",
+ error);
+
+ error = MPI_Comm_size(MPI_COMM_WORLD, &nproc);
+ if (verbose > 2 || error != MPI_SUCCESS)
+ rprintf(rank, -1, error != MPI_SUCCESS, "MPI_Comm_size: %d\n",
+ error);
+
+ if (nproc < 2)
+ rprintf(rank, -1, 1, "%s: must run with at least 2 processes\n",
+ prog);
+
+ append_buf = malloc(append_max);
+ if (append_buf == NULL)
+ rprintf(rank, -1, 1,"%s: error allocating append_buf %u\n",
+ prog, append_max);
+
+ write_buf = malloc(write_max);
+ if (write_buf == NULL)
+ rprintf(rank, -1, 1, "%s: error allocating write_buf %u\n",
+ prog, write_max);
+
+ if (gethostname(hostname, HOSTNAME_SIZE) < 0)
+ rprintf(rank, -1, 1, "%s: gethostname failed: %s\n",
+ prog, strerror(errno));
+
+ if (rank == 0) {
+ int max_size = write_max + (trunc_max ?: append_max)+append_max;
+
+ fd = open(fnames[0], O_WRONLY|O_CREAT|O_TRUNC, 0666);
+ rprintf(rank,-1, fd<0, "create %s, max size: %u, seed %u: %s\n",
+ fnames[0], max_size, seed, strerror(errno));
+ close(fd);
+
+ trunc_buf = calloc(1, trunc_max ?: append_max);
+ if (trunc_buf == NULL)
+ rprintf(rank,-1,1,"%s: error allocating trunc_buf %u\n",
+ prog, trunc_max ?: append_max);
+
+ /* initial write + truncate up + append */
+ read_buf = malloc(max_size);
+ if (read_buf == NULL)
+ rprintf(rank,-1,1,"%s: error allocating read_buf %u\n",
+ prog, max_size);
+ }
+
+ error = MPI_Barrier(MPI_COMM_WORLD);
+ if (verbose > 2 || error != MPI_SUCCESS)
+ rprintf(rank, -1, error != MPI_SUCCESS,
+ "prep MPI_Barrier: %d\n", error);
+
+ ifnames = rank % nfnames;
+ fd = open(fnames[ifnames], O_RDWR | O_APPEND);
+ if (verbose || fd < 0)
+ rprintf(rank, -1, errno, "open '%s' (%u): %s\n",
+ fnames[ifnames], ifnames, strerror(errno));
+
+ for (n = 0; n < nloops; n++) {
+ /* Initialized only to quiet stupid GCC warnings */
+ unsigned write_rank = 0, append_rank = n, trunc_rank = n + 1;
+ unsigned mpi_shared_vars[6];
+
+ /* reset the environment */
+ write_char = 'A' + (n % 26);
+ append_char = 'a' + (n % 26);
+
+ if (rank == 0) {
+ write_size = (rand() % (write_max - 1)) + 1;
+ append_size = (rand() % (append_max - 1)) + 1;
+ trunc_size = (rand() % ((trunc_max?: append_size)-1))+1;
+ trunc_offset = write_size + trunc_size;
+
+ if (verbose || n % 1000 == 0)
+ rprintf(rank, n, 0, STATUS_FMT"\n",
+ write_char, write_size, write_size,
+ append_char, append_size, append_size,
+ trunc_offset, trunc_offset);
+
+ write_rank = (classic_write ? 0 : rand()) % nproc;
+ do {
+ append_rank = (classic_write ? n : rand()) %
+ nproc;
+ /* We can't allow the append rank be the same
+ * as the classic_trunc trunc_rank, or we will
+ * spin here forever. */
+ } while (append_rank == (n + 1) % nproc);
+ do {
+ trunc_rank = (classic_trunc? (n + 1) : rand()) %
+ nproc;
+ } while (trunc_rank == append_rank);
+
+ mpi_shared_vars[0] = write_size;
+ mpi_shared_vars[1] = append_size;
+ mpi_shared_vars[2] = trunc_size;
+ mpi_shared_vars[3] = write_rank;
+ mpi_shared_vars[4] = append_rank;
+ mpi_shared_vars[5] = trunc_rank;
+ }
+
+ error = MPI_Bcast(&mpi_shared_vars, 6,
+ MPI_INT, 0, MPI_COMM_WORLD);
+ if (verbose > 2 || error != MPI_SUCCESS)
+ rprintf(rank, n, error != MPI_SUCCESS,
+ "MPI_Bcast mpi_shared_vars"
+ "[%u, %u, %u, %u, %u, %u]: %d\n",
+ mpi_shared_vars[0], mpi_shared_vars[1],
+ mpi_shared_vars[2], mpi_shared_vars[3],
+ mpi_shared_vars[4], mpi_shared_vars[5], error);
+
+ if (rank != 0) {
+ write_size = mpi_shared_vars[0];
+ append_size = mpi_shared_vars[1];
+ trunc_size = mpi_shared_vars[2];
+ write_rank = mpi_shared_vars[3];
+ append_rank = mpi_shared_vars[4];
+ trunc_rank = mpi_shared_vars[5];
+
+ trunc_offset = write_size + trunc_size;
+ }
+
+ if (rank == write_rank || rank == 0)
+ memset(write_buf, write_char, write_max);
+
+ if (rank == write_rank) {
+ ifnames = (classic_write ? 0 : rand()) % nfnames;
+ ret = truncate(fnames[ifnames], 0);
+ if (verbose > 1 || ret != 0)
+ rprintf(rank, n, ret,
+ "initial truncate %s (%u) @ 0: %s\n",
+ fnames[ifnames], ifnames,
+ strerror(errno));
+
+ done = 0;
+ do {
+ ret = write(fd, write_buf+done,write_size-done);
+ if (verbose > 1 || ret <= 0) {
+ rprintf(rank, n, ret <= 0,
+ "write %d/%d @ %d: %s\n",
+ ret + done, write_size, done,
+ strerror(errno));
+ if (ret <= 0)
+ break;
+ }
+ done += ret;
+ } while (done != write_size);
+ }
+
+ if (rank == append_rank || rank == 0)
+ memset(append_buf, append_char, append_size);
+
+ error = MPI_Barrier(MPI_COMM_WORLD);
+ if (verbose > 2 || error != MPI_SUCCESS)
+ rprintf(rank, n, error != MPI_SUCCESS,
+ "start MPI_Barrier: %d\n", error);
+
+ /* Do the race */
+ if (rank == append_rank) {
+ done = 0;
+ do {
+ ret = write(fd, append_buf + done,
+ append_size - done);
+ if (ret < 0) {
+ rprintf(rank, n, ret < 0,
+ "append %u/%u: %s\n",
+ ret + done, append_size,
+ strerror(errno));
+ break;
+ } else if (verbose > 1 || ret != append_size) {
+ rprintf(rank, n, ret != append_size,
+ "append %u/%u\n",
+ ret + done, append_size);
+ }
+ done += ret;
+ } while (done != append_size);
+ } else if (rank == trunc_rank) {
+ /* XXX: truncating the same file descriptor as the
+ * append on a single node causes this test
+ * to fail currently (2009-02-01). */
+ ifnames = (classic_trunc ? rank : rand()) % nfnames;
+ ret = truncate(fnames[ifnames], trunc_offset);
+ if (verbose > 1 || ret != 0)
+ rprintf(rank, n, ret,
+ "truncate %s (%u) @ %u: %s\n",
+ fnames[ifnames], ifnames,
+ trunc_offset, strerror(errno));
+ }
+
+ error = MPI_Barrier(MPI_COMM_WORLD);
+ if (verbose > 2 || error != MPI_SUCCESS)
+ rprintf(rank, n, error != MPI_SUCCESS,
+ "end MPI_Barrier: %d\n", error);
+
+ error = 0;
+
+ /* Check the result */
+ if (rank == 0) {
+ char *tmp_buf;
+ struct stat st = { 0 };
+
+ ifnames = classic_check ? 0 : (rand() % nfnames);
+ ret = stat(fnames[ifnames], &st);
+ if (verbose > 1 || ret != 0)
+ rprintf(rank, n, ret,
+ "stat %s (%u) size %llu: %s\n",
+ fnames[ifnames], ifnames,
+ (long long)st.st_size, strerror(errno));
+
+ ret = lseek(fd, 0, SEEK_SET);
+ if (ret != 0)
+ rprintf(rank, n, ret, "lseek 0: %s\n",
+ strerror(errno));
+
+ done = 0;
+ do {
+ ret = read(fd, read_buf+done, st.st_size-done);
+ if (verbose > 1 || ret <= 0) {
+ rprintf(rank, n, ret <= 0,
+ "read %d/%llu @ %u: %s\n",
+ ret, (long long)st.st_size-done,
+ done, ret != 0 ?
+ strerror(errno) : "short read");
+ }
+ done += ret;
+ } while (done != st.st_size);
+
+ if (memcmp(read_buf, write_buf, write_size)) {
+ rprintf(rank, n, 0, "WRITE bad "
+ "[0-%d]/[0-%#x] != %c\n",
+ write_size - 1, write_size - 1,
+ write_char);
+ error = 1;
+ }
+
+ tmp_buf = read_buf + write_size;
+
+ if (st.st_size == trunc_offset) {
+ /* Check case 1: first append then truncate */
+ int tmp_size, tmp_offset;
+
+ tmp_size = trunc_size < append_size ?
+ trunc_size : append_size;
+ tmp_offset = write_size + tmp_size;
+
+ if (memcmp(tmp_buf, append_buf, tmp_size)) {
+ rprintf(rank, n, 0,"trunc-after-APPEND "
+ "bad [%d-%d]/[%#x-%#x] != %c\n",
+ write_size, tmp_offset - 1,
+ write_size, tmp_offset - 1,
+ append_char);
+ error = 1;
+ } else if (trunc_size > append_size &&
+ memcmp(tmp_buf+append_size,trunc_buf,
+ trunc_size - append_size)) {
+ rprintf(rank, n, 0,"TRUNC-after-append "
+ "bad [%d-%d]/[%#x-%#x] != 0\n",
+ tmp_offset, trunc_offset - 1,
+ tmp_offset, trunc_offset - 1);
+ error = 1;
+ }
+ } else {
+ int expected_size = trunc_offset + append_size;
+ /* Check case 2: first truncate then append */
+ if (st.st_size != expected_size) {
+ rprintf(rank, n, 0,"APPEND-after-trunc "
+ "bad file size %llu != %u\n",
+ (long long)st.st_size,
+ expected_size);
+ error = 1;
+ }
+
+ if (memcmp(tmp_buf, trunc_buf, trunc_size)) {
+ rprintf(rank, n, 0,"append-after-TRUNC "
+ "bad [%d-%d]/[%#x-%#x] != 0\n",
+ write_size, trunc_offset - 1,
+ write_size, trunc_offset - 1);
+ error = 1;
+ } else if (memcmp(read_buf + trunc_offset,
+ append_buf, append_size)) {
+ rprintf(rank, n, 0,"APPEND-after-trunc "
+ "bad [%d-%d]/[%#x-%#x] != %c\n",
+ trunc_offset, expected_size - 1,
+ trunc_offset, expected_size - 1,
+ append_char);
+ error = 1;
+ }
+ }
+
+ if (error == 1) {
+ char command[4096];
+
+ rprintf(rank, n, 0, STATUS_FMT"\n",
+ write_char, write_size, write_size,
+ append_char, append_size, append_size,
+ trunc_offset, trunc_offset);
+
+ sprintf(command, "od -Ax -a %s", fnames[0]);
+ system(command);
+ MPI_Abort(MPI_COMM_WORLD, 1);
+ }
+ }
+ }
+
+ if (rank == 0 || verbose)
+ printf("r=%2u n=%4u: "STATUS_FMT"\nPASS\n", rank, n - 1,
+ write_char, write_size, write_size,
+ append_char, append_size, append_size,
+ trunc_offset, trunc_offset);
+
+ close(fd);
+
+ if (rank == 0) {
+ ifnames = rand() % nfnames;
+ ret = unlink(fnames[ifnames]);
+ if (ret != 0)
+ printf("%s: unlink %s failed: %s\n",
+ prog, fnames[ifnames], strerror(errno));
+ }
+
+ MPI_Finalize();
+ return 0;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff