In a DAX mountpoint, do IO betwen files with and
without DAX per-inode flag. We do mmap, both
O_DIRECT and buffered read/write IO in this case.
Then test again in the same device without dax
mountoption.
Add help _require_scratch_dax to make sure we can
test DAX feature on SCRATCH_DEV.
Add mmap dio test programme to test read/write
between a mmap area of one file and another file
directly or buffered, with different size.
Signed-off-by: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Signed-off-by: Xiong Zhou <xzhou@xxxxxxxxxx>
---
.gitignore | 1 +
common/rc | 13 +++++
src/Makefile | 2 +-
src/t_mmap_dio.c | 111 ++++++++++++++++++++++++++++++++++++++
tests/xfs/196 | 158 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/196.out | 2 +
tests/xfs/group | 1 +
7 files changed, 287 insertions(+), 1 deletion(-)
create mode 100644 src/t_mmap_dio.c
create mode 100755 tests/xfs/196
create mode 100644 tests/xfs/196.out
diff --git a/.gitignore b/.gitignore
index 7dcea14..48a40a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -129,6 +129,7 @@
/src/cloner
/src/renameat2
/src/t_rename_overwrite
+/src/t_mmap_dio
# dmapi/ binaries
/dmapi/src/common/cmd/read_invis
diff --git a/common/rc b/common/rc
index 7e2eaee..b99c4e2 100644
--- a/common/rc
+++ b/common/rc
@@ -2633,6 +2633,19 @@ _require_scratch_shutdown()
_scratch_unmount
}
+# Does dax mount option work on this dev/fs?
+_require_scratch_dax()
+{
+ _require_scratch
+ _scratch_mkfs > /dev/null 2>&1
+ _scratch_mount -o dax
+ # Check options to be sure. XFS ignores dax option
+ # and goes on if dev underneath does not support dax.
+ _fs_options $SCRATCH_DEV | grep -qw "dax" || \
+ _notrun "$SCRATCH_DEV $FSTYP does not support -o dax"
+ _scratch_unmount
+}
+
# Does norecovery support by this fs?
_require_norecovery()
{
diff --git a/src/Makefile b/src/Makefile
index 94d74aa..eb5a56c 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -12,7 +12,7 @@ TARGETS = dirstress fill fill2 getpagesize holes lstat64 \
godown resvtest writemod makeextents itrash rename \
multi_open_unlink dmiperf unwritten_sync genhashnames t_holes \
t_mmap_writev t_truncate_cmtime dirhash_collide t_rename_overwrite \
- holetest t_truncate_self
+ holetest t_truncate_self t_mmap_dio
LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \
preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \
diff --git a/src/t_mmap_dio.c b/src/t_mmap_dio.c
new file mode 100644
index 0000000..69b9ca8
--- /dev/null
+++ b/src/t_mmap_dio.c
@@ -0,0 +1,111 @@
+/*
+ * This programme was originally written by
+ * Jeff Moyer <jmoyer@xxxxxxxxxx>
+ *
+ * Copyright (C) 2016, Red Hat, Inc.
+ */
+#define _GNU_SOURCE 1
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <libaio.h>
+#include <errno.h>
+#include <sys/time.h>
+
+void usage(char *prog)
+{
+ fprintf(stderr,
+ "usage: %s <src file> <dest file> <size> <msg>\n",
+ prog);
+ exit(1);
+}
+
+void err_exit(char *op, unsigned long len, char *s)
+{
+ fprintf(stderr, "%s(%s) len %lu %s\n",
+ op, strerror(errno), len, s);
+ exit(1);
+}
+
+int main(int argc, char **argv)
+{
+ int fd, fd2, ret, dio = 1;
+ char *map;
+ char *msg;
+ char *sfile;
+ char *dfile;
+ unsigned long len, opt;
+
+ if (argc < 4)
+ usage(basename(argv[0]));
+
+ while ((opt = getopt(argc, argv, "b")) != -1)
+ dio = 0;
+
+ sfile = argv[optind];
+ dfile = argv[optind + 1];
+ msg = argv[optind + 3];
+ len = strtoul(argv[optind + 2], NULL, 10);
+ if (errno == ERANGE)
+ err_exit("strtoul", 0, msg);
+
+ /* Open source file and mmap*/
+ fd = open(sfile, O_RDWR, 0644);
+ if (fd < 0)
+ err_exit("open src", len, msg);
+
+ map = (char *)mmap(NULL, len,
+ PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
+ if (map == MAP_FAILED)
+ err_exit("mmap", len, msg);
+
+ if (dio == 1) {
+ /* Open dest file with O_DIRECT */
+ fd2 = open(dfile, O_RDWR|O_DIRECT, 0644);
+ if (fd2 < 0)
+ err_exit("open dest", len, msg);
+ } else {
+ /* Open dest file without O_DIRECT */
+ fd2 = open(dfile, O_RDWR, 0644);
+ if (fd2 < 0)
+ err_exit("open dest", len, msg);
+ }
+
+ /* First, test storing to dest file from source mapping */
+ ret = write(fd2, map, len);
+ if (ret != len)
+ err_exit("write", len, msg);
+
+ ret = fsync(fd2);
+ if (ret != 0)
+ err_exit("fsync", len, msg);
+
+ ret = (int)lseek(fd2, 0, SEEK_SET);
+ if (ret == -1)
+ err_exit("lseek", len, msg);
+
+ /* Next, test reading from dest file into source mapping */
+ ret = read(fd2, map, len);
+ if (ret != len)
+ err_exit("read", len, msg);
+ ret = msync(map, len, MS_SYNC);
+ if (ret < 0)
+ err_exit("msync", len, msg);
+
+ ret = munmap(map, len);
+ if (ret < 0)
+ err_exit("munmap", len, msg);
+
+ ret = close(fd);
+ if (ret < 0)
+ err_exit("clsoe fd", len, msg);
+
+ ret = close(fd2);
+ if (ret < 0)
+ err_exit("close fd2", len, msg);
+
+ exit(0);
+}
diff --git a/tests/xfs/196 b/tests/xfs/196
new file mode 100755
index 0000000..8b1099c
--- /dev/null
+++ b/tests/xfs/196
@@ -0,0 +1,158 @@
+#! /bin/bash
+# FS QA Test 196
+#
+# Test per-inode DAX flag by mmap direct/buffered IO.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 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
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+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 $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+_supported_fs xfs
+_supported_os Linux
+_require_scratch_dax
+_require_test_program "feature"
+_require_test_program "t_mmap_dio"
+_require_xfs_io_command "chattr" "+/-x"
+_require_xfs_io_command "falloc"
+
+prep_files()
+{
+ rm -f $SCRATCH_MNT/tf_{s,d}
+
+ $XFS_IO_PROG -f -c "falloc 0 $tsize" \
+ $SCRATCH_MNT/tf_{s,d} >> $seqres.full 2>&1
+}
+
+t_both_dax()
+{
+ prep_files
+ $XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_{s,d}
+ # with O_DIRECT first
+ src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} $1 "dio both dax"
+
+ prep_files
+ $XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_{s,d}
+ # again with buffered IO
+ src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
+ $1 "buffered both dax"
+}
+
+t_nondax_to_dax()
+{
+ prep_files
+ $XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_s
+ $XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_d
+ src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} \
+ $1 "dio nondax to dax"
+
+ prep_files
+ $XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_s
+ $XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_d
+ src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
+ $1 "buffered nondax to dax"
+}
+
+t_dax_to_nondax()
+{
+ prep_files
+ $XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_s
+ $XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_d
+ src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} \
+ $1 "dio dax to nondax"
+
+ prep_files
+ $XFS_IO_PROG -c "chattr +x" $SCRATCH_MNT/tf_s
+ $XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_d
+ src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
+ $1 "buffered dax to nondax"
+}
+
+t_both_nondax()
+{
+ prep_files
+ $XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_{s,d}
+ src/t_mmap_dio $SCRATCH_MNT/tf_{s,d} \
+ $1 "dio both nondax"
+
+ prep_files
+ $XFS_IO_PROG -c "chattr -x" $SCRATCH_MNT/tf_{s,d}
+ src/t_mmap_dio -b $SCRATCH_MNT/tf_{s,d} \
+ $1 "buffered both nondax"
+}
+
+# $1 mmap read/write size
+t_dax_flag_mmap_dio()
+{
+ t_both_dax $1
+ t_dax_to_nondax $1
+ t_nondax_to_dax $1
+ t_both_nondax $1
+}
+
+do_tests()
+{
+ # less than page size
+ t_dax_flag_mmap_dio 1024
+ # page size
+ t_dax_flag_mmap_dio `src/feature -s`
+ # bigger sizes, for PMD faults
+ t_dax_flag_mmap_dio $((16 * 1024 * 1024))
+ t_dax_flag_mmap_dio $((64 * 1024 * 1024))
+}
+
+# make xfs 2Mb aligned for PMD fault testing
+_scratch_mkfs "-d su=2m,sw=1" > /dev/null 2>&1
+
+# mount with dax option
+_scratch_mount "-o dax"
+
+tsize=$((128 * 1024 * 1024))
+
+do_tests
+_scratch_unmount
+
+# mount again without dax option
+export MOUNT_OPTIONS=""
+_scratch_mount
+do_tests
+
+# success, all done
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/xfs/196.out b/tests/xfs/196.out
new file mode 100644
index 0000000..477dcf0
--- /dev/null
+++ b/tests/xfs/196.out
@@ -0,0 +1,2 @@
+QA output created by 196
+Silence is golden
diff --git a/tests/xfs/group b/tests/xfs/group
index 9757ec8..41d053f 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -193,6 +193,7 @@
193 auto quick clone
194 rw auto
195 ioctl dump auto quick
+196 auto attr quick
197 dir auto quick
198 auto quick clone
199 mount auto quick
--
1.8.3.1
--
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