[Qemu-devel] [PATCH] iotests: Tweak 221 sizing for different hole granularities

[Qemu-devel] [PATCH] iotests: Tweak 221 sizing for different hole granularities

[Eric Blake]

For some particular configurations of ext4, sizing an image to 84
sectors + 1 byte causes test failures when the size of the hole is
rounded to a 4k alignment. Let's instead size things to 128 sectors +
1 byte, as the 64k boundary is more likely to work with various hole
granularities.

Reported-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---

I have been unable to reproduce Thomas' failure, but suspect that this
will address it. If I can get a Tested-by, then I'm happy to add it
through my NBD tree, as I have a couple other iotest fixes ready for a
pull request.

 tests/qemu-iotests/221     | 10 +++++-----
 tests/qemu-iotests/221.out | 20 ++++++++++----------
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/tests/qemu-iotests/221 b/tests/qemu-iotests/221
index 808cd9a289c..25dd47bcfe4 100755
--- a/tests/qemu-iotests/221
+++ b/tests/qemu-iotests/221
@@ -2,7 +2,7 @@
 #
 # Test qemu-img vs. unaligned images
 #
-# Copyright (C) 2018 Red Hat, Inc.
+# Copyright (C) 2018-2019 Red Hat, Inc.
 #
 # 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
@@ -41,16 +41,16 @@ echo
 echo "=== Check mapping of unaligned raw image ==="
 echo

-_make_test_img 43009 # qemu-img create rounds size up
+_make_test_img 65537 # qemu-img create rounds size up
 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map

-truncate --size=43009 "$TEST_IMG" # so we resize it and check again
+truncate --size=65537 "$TEST_IMG" # so we resize it and check again
 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map

-$QEMU_IO -c 'w 43008 1' "$TEST_IMG" | _filter_qemu_io # writing also rounds up
+$QEMU_IO -c 'w 65536 1' "$TEST_IMG" | _filter_qemu_io # writing also rounds up
 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map

-truncate --size=43009 "$TEST_IMG" # so we resize it and check again
+truncate --size=65537 "$TEST_IMG" # so we resize it and check again
 $QEMU_IMG map --output=json "$TEST_IMG" | _filter_qemu_img_map

 # success, all done
diff --git a/tests/qemu-iotests/221.out b/tests/qemu-iotests/221.out
index a9c0190aadc..9f9dd52bb0b 100644
--- a/tests/qemu-iotests/221.out
+++ b/tests/qemu-iotests/221.out
@@ -2,15 +2,15 @@ QA output created by 221

 === Check mapping of unaligned raw image ===

-Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=43009
-[{ "start": 0, "length": 43520, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
-[{ "start": 0, "length": 43520, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
-wrote 1/1 bytes at offset 43008
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=65537
+[{ "start": 0, "length": 66048, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
+[{ "start": 0, "length": 66048, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
+wrote 1/1 bytes at offset 65536
 1 bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
-[{ "start": 0, "length": 40960, "depth": 0, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 40960, "length": 2049, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 43009, "length": 511, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
-[{ "start": 0, "length": 40960, "depth": 0, "zero": true, "data": false, "offset": OFFSET},
-{ "start": 40960, "length": 2049, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
-{ "start": 43009, "length": 511, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
+[{ "start": 0, "length": 65536, "depth": 0, "zero": true, "data": false, "offset": OFFSET},
+{ "start": 65536, "length": 1, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
+{ "start": 65537, "length": 511, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
+[{ "start": 0, "length": 65536, "depth": 0, "zero": true, "data": false, "offset": OFFSET},
+{ "start": 65536, "length": 1, "depth": 0, "zero": false, "data": true, "offset": OFFSET},
+{ "start": 65537, "length": 511, "depth": 0, "zero": true, "data": false, "offset": OFFSET}]
 *** done
-- 
2.20.1

Re: [Qemu-devel] [PATCH] iotests: Tweak 221 sizing for different hole granularities

[Thomas Huth]

On 06/05/2019 19.21, Eric Blake wrote:
> For some particular configurations of ext4, sizing an image to 84
> sectors + 1 byte causes test failures when the size of the hole is
> rounded to a 4k alignment. Let's instead size things to 128 sectors +
> 1 byte, as the 64k boundary is more likely to work with various hole
> granularities.
> 
> Reported-by: Thomas Huth <thuth@redhat.com>
> Signed-off-by: Eric Blake <eblake@redhat.com>
> ---
> 
> I have been unable to reproduce Thomas' failure, but suspect that this
> will address it. If I can get a Tested-by, then I'm happy to add it
> through my NBD tree, as I have a couple other iotest fixes ready for a
> pull request.
> 
>  tests/qemu-iotests/221     | 10 +++++-----
>  tests/qemu-iotests/221.out | 20 ++++++++++----------
>  2 files changed, 15 insertions(+), 15 deletions(-)

Thanks, this fixes the issue on my ext4 partition!

Tested-by: Thomas Huth <thuth@redhat.com>