Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: xfstests-dev/239
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ xfstests-dev/239 2010-06-26 11:38:22.000000000 +0000
@@ -0,0 +1,58 @@
+#! /bin/bash
+# FS QA Test No. 239
+#
+# Read from a sparse file immedialy after filling a hole to test for races
+# in unwritten extent conversion.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2010 Red Hat, Inc. All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would 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 for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#-----------------------------------------------------------------------
+#
+# creator
+owner=dchinner@xxxxxxxxxx
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ cd /
+ rm -f $TEST_DIR/tst-aio-dio-sparse-unwritten
+}
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fs generic
+_supported_os Linux
+
+AIO_TEST=src/aio-dio-regress/aio-dio-hole-filling-race
+[ -x $AIO_TEST ] || _notrun "$AIO_TEST not built"
+
+echo "Silence is golden"
+
+for i in `seq 1 500`; do
+ $AIO_TEST $TEST_DIR/tst-aio-dio-hole-filling-race || break
+done
+
+status=$?
+exit
Index: xfstests-dev/239.out
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ xfstests-dev/239.out 2010-06-26 11:38:47.000000000 +0000
@@ -0,0 +1,2 @@
+QA output created by 239
+Silence is golden
Index: xfstests-dev/group
===================================================================
--- xfstests-dev.orig/group 2010-06-26 11:35:07.000000000 +0000
+++ xfstests-dev/group 2010-06-26 11:35:18.000000000 +0000
@@ -352,3 +352,4 @@ deprecated
236 auto quick metadata
237 auto quick acl
238 auto quick metadata ioctl
+239 auto aio rw
Index: xfstests-dev/src/aio-dio-regress/aio-dio-hole-filling-race.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ xfstests-dev/src/aio-dio-regress/aio-dio-hole-filling-race.c 2010-06-26 11:39:40.000000000 +0000
@@ -0,0 +1,123 @@
+/*
+ * Read from a sparse file immedialy after filling a hole to test for races
+ * in unwritten extent conversion.
+ *
+ * Copyright (C) 2010 Red Hat, Inc. All Rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <libaio.h>
+
+#define BUF_SIZE 4096
+#define IO_PATTERN 0xab
+
+int main(int argc, char *argv[])
+{
+ struct io_context *ctx = NULL;
+ struct io_event ev;
+ struct iocb iocb, *iocbs[] = { &iocb };
+ void *buf;
+ char cmp_buf[BUF_SIZE];
+ int fd, err = 0;
+
+ fd = open(argv[1], O_DIRECT | O_CREAT | O_TRUNC | O_RDWR, 0600);
+ if (fd == -1) {
+ perror("open");
+ return 1;
+ }
+
+ err = posix_memalign(&buf, BUF_SIZE, BUF_SIZE);
+ if (err) {
+ fprintf(stderr, "error %s during %s\n",
+ strerror(-err),
+ "posix_memalign");
+ return 1;
+ }
+ memset(buf, IO_PATTERN, BUF_SIZE);
+ memset(cmp_buf, IO_PATTERN, BUF_SIZE);
+
+ /*
+ * Truncate to some random large file size. Just make sure
+ * it's not smaller than our I/O size.
+ */
+ if (ftruncate(fd, 1024 * 1024 * 1024) < 0) {
+ perror("ftruncate");
+ return 1;
+ }
+
+
+ /*
+ * Do a simple 4k write into a hole using aio.
+ */
+ err = io_setup(1, &ctx);
+ if (err) {
+ fprintf(stderr, "error %s during %s\n",
+ strerror(-err),
+ "io_setup");
+ return 1;
+ }
+
+ io_prep_pwrite(&iocb, fd, buf, BUF_SIZE, 0);
+
+ err = io_submit(ctx, 1, iocbs);
+ if (err != 1) {
+ fprintf(stderr, "error %s during %s\n",
+ strerror(-err),
+ "io_submit");
+ return 1;
+ }
+
+ err = io_getevents(ctx, 1, 1, &ev, NULL);
+ if (err != 1) {
+ fprintf(stderr, "error %s during %s\n",
+ strerror(-err),
+ "io_getevents");
+ return 1;
+ }
+
+ /*
+ * And then read it back.
+ *
+ * Using pread to keep it simple, but AIO has the same effect.
+ */
+ if (pread(fd, buf, BUF_SIZE, 0) != BUF_SIZE) {
+ perror("pread");
+ return 1;
+ }
+
+ /*
+ * And depending on the machine we'll just get zeroes back quite
+ * often here. That's because the unwritten extent conversion
+ * hasn't finished.
+ */
+ if (memcmp(buf, cmp_buf, BUF_SIZE)) {
+ unsigned long long *ubuf = (unsigned long long *)buf;
+ int i;
+
+ for (i = 0; i < BUF_SIZE / sizeof(unsigned long long); i++)
+ printf("%d: 0x%llx\n", i, ubuf[i]);
+ return 1;
+ }
+
+ return 0;
+}
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