| Message ID | 20230606103027.125617-1-wqu@suse.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | btrfs/266: test case enhancement to cover more possible failures | expand |
It is failing on sectorsize 64k.
---------
btrfs/266 2s ... - output mismatch (see
/xfstests-dev/results//btrfs/266.out.bad)
--- tests/btrfs/266.out 2023-06-06 20:02:48.900915702 -0400
+++ /xfstests-dev/results//btrfs/266.out.bad 2023-06-06
20:02:56.665554779 -0400
@@ -19,11 +19,11 @@
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
................
+XXXXXXXX: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb
................
-------
Thanks, Anand
On 06/06/2023 18:30, Qu Wenruo wrote:
> [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@suse.com>
> ---
> 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)
On 2023/6/7 08:13, Anand Jain wrote: > > > It is failing on sectorsize 64k. That's what I'm investigating. And the failure is random, if you ran more times it would pass (the failure rate is 1/3~1/5 in my case). Thanks, Qu > > --------- > btrfs/266 2s ... - output mismatch (see > /xfstests-dev/results//btrfs/266.out.bad) > --- tests/btrfs/266.out 2023-06-06 20:02:48.900915702 -0400 > +++ /xfstests-dev/results//btrfs/266.out.bad 2023-06-06 > 20:02:56.665554779 -0400 > @@ -19,11 +19,11 @@ > 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 > ................ > +XXXXXXXX: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb > ................ > ------- > > Thanks, Anand > > > On 06/06/2023 18:30, Qu Wenruo wrote: >> [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@suse.com> >> --- >> 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) >
On 2023/6/7 09:52, Qu Wenruo wrote: > > > On 2023/6/7 08:13, Anand Jain wrote: >> >> >> It is failing on sectorsize 64k. > > That's what I'm investigating. > > And the failure is random, if you ran more times it would pass (the > failure rate is 1/3~1/5 in my case). And to my surprise, this is in fact not a bug in btrfs, but more likely a bug in drop_caches. I added several trace printk() for __btrfs_submit_bio(), btrfs_check_read_bio(), and __end_bio_extent_readpage() to grasp the repair work flow. It turns out, when the test failed, at least one mirror is not read from disk, but directly using page cache. Thus no wonder the data would be repaired, just because that mirror is not properly read at all. I'll start a new thread on this particular problem. Thanks, Qu > > Thanks, > Qu >> >> --------- >> btrfs/266 2s ... - output mismatch (see >> /xfstests-dev/results//btrfs/266.out.bad) >> --- tests/btrfs/266.out 2023-06-06 20:02:48.900915702 -0400 >> +++ /xfstests-dev/results//btrfs/266.out.bad 2023-06-06 >> 20:02:56.665554779 -0400 >> @@ -19,11 +19,11 @@ >> 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 >> ................ >> +XXXXXXXX: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb >> ................ >> ------- >> >> Thanks, Anand >> >> >> On 06/06/2023 18:30, Qu Wenruo wrote: >>> [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@suse.com> >>> --- >>> 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) >>
On 07/06/2023 15:39, Qu Wenruo wrote: > > > On 2023/6/7 09:52, Qu Wenruo wrote: >> >> >> On 2023/6/7 08:13, Anand Jain wrote: >>> >>> >>> It is failing on sectorsize 64k. >> >> That's what I'm investigating. >> >> And the failure is random, if you ran more times it would pass (the >> failure rate is 1/3~1/5 in my case). > > And to my surprise, this is in fact not a bug in btrfs, but more likely > a bug in drop_caches. > > I added several trace printk() for __btrfs_submit_bio(), > btrfs_check_read_bio(), and __end_bio_extent_readpage() to grasp the > repair work flow. > > It turns out, when the test failed, at least one mirror is not read from > disk, but directly using page cache. > Thus no wonder the data would be repaired, just because that mirror is > not properly read at all. > Failure is inconsistent on my system too. Does the test fails depending on which mirror becomes the latest_bdev for the metadata? Thanks, Anand > I'll start a new thread on this particular problem. > > Thanks, > Qu >> >> Thanks, >> Qu >>> >>> --------- >>> btrfs/266 2s ... - output mismatch (see >>> /xfstests-dev/results//btrfs/266.out.bad) >>> --- tests/btrfs/266.out 2023-06-06 20:02:48.900915702 -0400 >>> +++ /xfstests-dev/results//btrfs/266.out.bad 2023-06-06 >>> 20:02:56.665554779 -0400 >>> @@ -19,11 +19,11 @@ >>> 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 >>> ................ >>> +XXXXXXXX: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb >>> ................ >>> ------- >>> >>> Thanks, Anand >>> >>> >>> On 06/06/2023 18:30, Qu Wenruo wrote: >>>> [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@suse.com> >>>> --- >>>> 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) >>>
On 2023/6/7 18:29, Anand Jain wrote: > > > On 07/06/2023 15:39, Qu Wenruo wrote: >> >> >> On 2023/6/7 09:52, Qu Wenruo wrote: >>> >>> >>> On 2023/6/7 08:13, Anand Jain wrote: >>>> >>>> >>>> It is failing on sectorsize 64k. >>> >>> That's what I'm investigating. >>> >>> And the failure is random, if you ran more times it would pass (the >>> failure rate is 1/3~1/5 in my case). >> >> And to my surprise, this is in fact not a bug in btrfs, but more likely >> a bug in drop_caches. >> >> I added several trace printk() for __btrfs_submit_bio(), >> btrfs_check_read_bio(), and __end_bio_extent_readpage() to grasp the >> repair work flow. >> > It turns out, when the test failed, at least one mirror is not read >> from >> disk, but directly using page cache. > Thus no wonder the data would >> be repaired, just because that mirror is >> not properly read at all. >> > > Failure is inconsistent on my system too. Does the test fails depending > on which mirror becomes the latest_bdev for the metadata? Nope, it's purely a problem related to "echo 3 > drop_caches" either not dropping the data caches of that inode, or returned before dropping all possible pages, or something else is locking that data pages thus preventing the drop. Metadata has no impact, as we choose mirrors indepedent from the lastest_bdev. Thanks, Qu > > Thanks, Anand > > >> I'll start a new thread on this particular problem. >> >> Thanks, >> Qu >>> >>> Thanks, >>> Qu >>>> >>>> --------- >>>> btrfs/266 2s ... - output mismatch (see >>>> /xfstests-dev/results//btrfs/266.out.bad) >>>> --- tests/btrfs/266.out 2023-06-06 20:02:48.900915702 -0400 >>>> +++ /xfstests-dev/results//btrfs/266.out.bad 2023-06-06 >>>> 20:02:56.665554779 -0400 >>>> @@ -19,11 +19,11 @@ >>>> 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 >>>> ................ >>>> +XXXXXXXX: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb >>>> ................ >>>> ------- >>>> >>>> Thanks, Anand >>>> >>>> >>>> On 06/06/2023 18:30, Qu Wenruo wrote: >>>>> [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@suse.com> >>>>> --- >>>>> 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) >>>>
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)
[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@suse.com> --- tests/btrfs/266 | 59 ++++++++++++++++++++---- tests/btrfs/266.out | 109 ++++++++------------------------------------ 2 files changed, 68 insertions(+), 100 deletions(-)