[BACKGROUND]
Recently I'm debugging a random failure with btrfs/266 with larger page
sizes (64K page size, with either 64K sector size or 4K sector size).
During the tests, I found the test case itself can be further enhanced
to make better coverage and easier debugging.
[ENHANCEMENT]
- Ensure every 64K block only has one good mirror
The initial layout is not pushing hard enough, some ranges have 2 good
mirrors while some only has one.
- Simplify the golden output
The current golden output contains 512 bytes output for the beginning
of each mirror.
The 512 bytes output itself is both duplicating and not comprehensive
enough (see the next output).
This patch would remove the duplication part by only output one single
line for 16 bytes.
- Add extra output for all the 3 64K blocks
Each 64K of the involved file now has only one good mirror, and they
are all on different devices.
Thus only checking the beginning of the first 64K block is not good
enough.
This patch would enhance this by output the first 16 bytes for all the
3 64K blocks on each device.
- Add a final safenet to catch unexpected corruption
If we have some weird corruption after the first 16 bytes of each
64K blocks, we can still detect them using "btrfs check
--check-data-csum", which acts as offline scrub.
Signed-off-by: Qu Wenruo <wqu@xxxxxxxx>
---
tests/btrfs/266 | 59 ++++++++++++++++++++----
tests/btrfs/266.out | 109 ++++++++------------------------------------
2 files changed, 68 insertions(+), 100 deletions(-)
diff --git a/tests/btrfs/266 b/tests/btrfs/266
index 42aff7c0..894c5c6e 100755
--- a/tests/btrfs/266
+++ b/tests/btrfs/266
@@ -25,7 +25,7 @@ _require_odirect
_require_non_zoned_device "${SCRATCH_DEV}"
_scratch_dev_pool_get 3
-# step 1, create a raid1 btrfs which contains one 128k file.
+# step 1, create a raid1 btrfs which contains one 192k file.
echo "step 1......mkfs.btrfs"
mkfs_opts="-d raid1c3 -b 1G"
@@ -33,7 +33,7 @@ _scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
_scratch_mount
-$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 256K 0 256K" \
+$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 192K 0 192K" \
"$SCRATCH_MNT/foobar" | \
_filter_xfs_io_offset
@@ -56,6 +56,13 @@ devpath3=$(_btrfs_get_device_path ${logical} 3)
_scratch_unmount
+# We corrupt the mirrors so that every 64K block only has one
+# good mirror. (X = corruption)
+#
+# 0 64K 128K 192K
+# Mirror 1 |XXXXXXXXXXXXXXX| |
+# Mirror 2 | |XXXXXXXXXXXXXXX|
+# Mirror 3 |XXXXXXX| |XXXXXXX|
$XFS_IO_PROG -d -c "pwrite -S 0xbd -b 64K $physical3 64K" \
$devpath3 > /dev/null
@@ -65,7 +72,7 @@ $XFS_IO_PROG -d -c "pwrite -S 0xba -b 64K $physical1 128K" \
$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 64K $((physical2 + 65536)) 128K" \
$devpath2 > /dev/null
-$XFS_IO_PROG -d -c "pwrite -S 0xbc -b 64K $((physical3 + (2 * 65536))) 128K" \
+$XFS_IO_PROG -d -c "pwrite -S 0xbc -b 64K $((physical3 + (2 * 65536))) 64K" \
$devpath3 > /dev/null
_scratch_mount
@@ -73,19 +80,53 @@ _scratch_mount
# step 3, 128k dio read (this read can repair bad copy)
echo "step 3......repair the bad copy"
-_btrfs_buffered_read_on_mirror 0 3 "$SCRATCH_MNT/foobar" 0 256K
-_btrfs_buffered_read_on_mirror 1 3 "$SCRATCH_MNT/foobar" 0 256K
-_btrfs_buffered_read_on_mirror 2 3 "$SCRATCH_MNT/foobar" 0 256K
+_btrfs_buffered_read_on_mirror 0 3 "$SCRATCH_MNT/foobar" 0 192K
+_btrfs_buffered_read_on_mirror 1 3 "$SCRATCH_MNT/foobar" 0 192K
+_btrfs_buffered_read_on_mirror 2 3 "$SCRATCH_MNT/foobar" 0 192K
_scratch_unmount
echo "step 4......check if the repair worked"
-$XFS_IO_PROG -d -c "pread -v -b 512 $physical1 512" $devpath1 |\
+echo "Dev 1:"
+echo " Physical offset + 0:"
+$XFS_IO_PROG -c "pread -qv $physical1 16" $devpath1 |\
_filter_xfs_io_offset
-$XFS_IO_PROG -d -c "pread -v -b 512 $physical2 512" $devpath2 |\
+echo " Physical offset + 64K:"
+$XFS_IO_PROG -c "pread -qv $((physical1 + 65536)) 16" $devpath1 |\
_filter_xfs_io_offset
-$XFS_IO_PROG -d -c "pread -v -b 512 $physical3 512" $devpath3 |\
+echo " Physical offset + 128K:"
+$XFS_IO_PROG -c "pread -qv $((physical1 + 131072)) 16" $devpath1 |\
_filter_xfs_io_offset
+echo
+
+echo "Dev 2:"
+echo " Physical offset + 0:"
+$XFS_IO_PROG -c "pread -qv $physical2 16" $devpath2 |\
+ _filter_xfs_io_offset
+echo " Physical offset + 64K:"
+$XFS_IO_PROG -c "pread -qv $((physical2 + 65536)) 16" $devpath2 |\
+ _filter_xfs_io_offset
+echo " Physical offset + 128K:"
+$XFS_IO_PROG -c "pread -qv $((physical2 + 131072)) 16" $devpath2 |\
+ _filter_xfs_io_offset
+echo
+
+echo "Dev 3:"
+echo " Physical offset + 0:"
+$XFS_IO_PROG -c "pread -v $physical3 16" $devpath3 |\
+ _filter_xfs_io_offset
+echo " Physical offset + 64K:"
+$XFS_IO_PROG -c "pread -v $((physical3 + 65536)) 16" $devpath3 |\
+ _filter_xfs_io_offset
+echo " Physical offset + 128K:"
+$XFS_IO_PROG -c "pread -v $((physical3 + 131072)) 16" $devpath3 |\
+ _filter_xfs_io_offset
+
+# Final step to use btrfs check to verify the csum of all mirrors.
+$BTRFS_UTIL_PROG check --check-data-csum $SCRATCH_DEV >> $seqres.full 2>&1
+if [ $? -ne 0 ]; then
+ echo "btrfs check found some data csum mismatch"
+fi
_scratch_dev_pool_put
# success, all done
diff --git a/tests/btrfs/266.out b/tests/btrfs/266.out
index fcf2f5b8..305e9c83 100644
--- a/tests/btrfs/266.out
+++ b/tests/btrfs/266.out
@@ -1,109 +1,36 @@
QA output created by 266
step 1......mkfs.btrfs
-wrote 262144/262144 bytes
+wrote 196608/196608 bytes
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
step 2......corrupt file extent
step 3......repair the bad copy
step 4......check if the repair worked
+Dev 1:
+ Physical offset + 0:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+ Physical offset + 64K:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+ Physical offset + 128K:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+
+Dev 2:
+ Physical offset + 0:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+ Physical offset + 64K:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+ Physical offset + 128K:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+
+Dev 3:
+ Physical offset + 0:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-read 512/512 bytes
+read 16/16 bytes
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+ Physical offset + 64K:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-read 512/512 bytes
+read 16/16 bytes
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+ Physical offset + 128K:
XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
-read 512/512 bytes
+read 16/16 bytes
XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
--
2.39.0
