From: Christoph Hellwig <hch@lst.de>
To: fstests@vger.kernel.org
Cc: linux-btrfs@vger.kernel.org
Subject: [PATCH 2/2] btrfs: test repair with corrupted sectors interleaved over multiple mirrors
Date: Fri, 20 May 2022 18:47:43 +0200 [thread overview]
Message-ID: <20220520164743.4023665-3-hch@lst.de> (raw)
In-Reply-To: <20220520164743.4023665-1-hch@lst.de>
Test that repair handles the case where it needs to read from more than
a single mirror on the raid1c3 profile and needs to take turns over the
mirrors to recover data for the whole read.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
tests/btrfs/266 | 145 ++++++++++++++++++++++++++++++++++++++++++++
tests/btrfs/266.out | 109 +++++++++++++++++++++++++++++++++
2 files changed, 254 insertions(+)
create mode 100755 tests/btrfs/266
create mode 100644 tests/btrfs/266.out
diff --git a/tests/btrfs/266 b/tests/btrfs/266
new file mode 100755
index 00000000..24c2b5fd
--- /dev/null
+++ b/tests/btrfs/266
@@ -0,0 +1,145 @@
+#! /bin/bash
+# SPDX-License-Identifier: GPL-2.0
+# Copyright (c) 2017 Liu Bo. All Rights Reserved.
+# Copyright (c) 2022 Christoph Hellwig.
+#
+# FS QA Test 266
+#
+# Test that btrfs raid repair on a raid1c3 profile can repair interleaving
+# errors on all mirrors.
+#
+
+. ./common/preamble
+_begin_fstest auto quick read_repair
+
+# Import common functions.
+. ./common/filter
+
+# real QA test starts here
+
+_supported_fs btrfs
+_require_scratch_dev_pool 3
+
+BTRFS_MAP_LOGICAL_PROG=$(type -P btrfs-map-logical)
+
+_require_command "$BTRFS_MAP_LOGICAL_PROG" btrfs-map-logical
+_require_command "$FILEFRAG_PROG" filefrag
+_require_odirect
+# Overwriting data is forbidden on a zoned block device
+_require_non_zoned_device "${SCRATCH_DEV}"
+
+get_physical()
+{
+ local logical=$1
+ local stripe=$2
+
+ $BTRFS_MAP_LOGICAL_PROG -l $logical $SCRATCH_DEV >> $seqres.full 2>&1
+ $BTRFS_MAP_LOGICAL_PROG -l $logical $SCRATCH_DEV | \
+ $AWK_PROG "(\$1 ~ /mirror/ && \$2 ~ /$stripe/) { print \$6 }"
+}
+
+get_device_path()
+{
+ local logical=$1
+ local stripe=$2
+
+ $BTRFS_MAP_LOGICAL_PROG -l $logical $SCRATCH_DEV | \
+ $AWK_PROG "(\$1 ~ /mirror/ && \$2 ~ /$stripe/) { print \$8 }"
+}
+
+_scratch_dev_pool_get 3
+# step 1, create a raid1 btrfs which contains one 128k file.
+echo "step 1......mkfs.btrfs"
+
+mkfs_opts="-d raid1c3 -b 1G"
+_scratch_pool_mkfs $mkfs_opts >>$seqres.full 2>&1
+
+# make sure data is written to the start position of the data chunk
+_scratch_mount $(_btrfs_no_v1_cache_opt)
+
+$XFS_IO_PROG -f -d -c "pwrite -S 0xaa -b 128K 0 128K" \
+ "$SCRATCH_MNT/foobar" | \
+ _filter_xfs_io_offset
+
+# ensure btrfs-map-logical sees the tree updates
+sync
+
+# step 2, corrupt 4k in each copy
+echo "step 2......corrupt file extent"
+
+${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar >> $seqres.full
+logical=`${FILEFRAG_PROG} -v $SCRATCH_MNT/foobar | _filter_filefrag | cut -d '#' -f 1`
+
+physical1=$(get_physical ${logical} 1)
+devpath1=$(get_device_path ${logical} 1)
+
+physical2=$(get_physical ${logical} 2)
+devpath2=$(get_device_path ${logical} 2)
+
+physical3=$(get_physical ${logical} 3)
+devpath3=$(get_device_path ${logical} 3)
+
+_scratch_unmount
+
+$XFS_IO_PROG -d -c "pwrite -S 0xbd -b 4K $physical3 4K" $devpath3 \
+ > /dev/null
+
+$XFS_IO_PROG -d -c "pwrite -S 0xba -b 4K $physical1 8K" $devpath1 \
+ > /dev/null
+
+$XFS_IO_PROG -d -c "pwrite -S 0xbb -b 4K $((physical2 + 4096)) 8K" $devpath2 \
+ > /dev/null
+
+$XFS_IO_PROG -d -c "pwrite -S 0xbc -b 4K $((physical3 + (2 * 4096))) 8K" \
+ $devpath3 > /dev/null
+
+_scratch_mount
+
+# step 3, 128k dio read (this read can repair bad copy)
+echo "step 3......repair the bad copy"
+
+# since raid1c3 consists of three copies, and the bad copy was put on stripe #1
+# while the good copy lies the other stripes, the bad copy only gets accessed
+# when the reader's pid % 3 is 1
+while true; do
+ echo 3 > /proc/sys/vm/drop_caches
+ $XFS_IO_PROG -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null &
+ pid=$!
+ wait
+ if [ $((pid % 3)) == 1 ]; then
+ break
+ fi
+done
+while true; do
+ echo 3 > /proc/sys/vm/drop_caches
+ $XFS_IO_PROG -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null &
+ pid=$!
+ wait
+ if [ $((pid % 3)) == 2 ]; then
+ break
+ fi
+done
+while true; do
+ echo 3 > /proc/sys/vm/drop_caches
+ $XFS_IO_PROG -c "pread -b 128K 0 128K" "$SCRATCH_MNT/foobar" > /dev/null &
+ pid=$!
+ wait
+ if [ $((pid % 3)) == 0 ]; then
+ break
+ fi
+done
+
+_scratch_unmount
+
+echo "step 4......check if the repair works"
+$XFS_IO_PROG -d -c "pread -v -b 512 $physical1 512" $devpath1 |\
+ _filter_xfs_io_offset
+$XFS_IO_PROG -d -c "pread -v -b 512 $physical2 512" $devpath2 |\
+ _filter_xfs_io_offset
+$XFS_IO_PROG -d -c "pread -v -b 512 $physical3 512" $devpath3 |\
+ _filter_xfs_io_offset
+
+_scratch_dev_pool_put
+# success, all done
+status=0
+exit
diff --git a/tests/btrfs/266.out b/tests/btrfs/266.out
new file mode 100644
index 00000000..243d1e1d
--- /dev/null
+++ b/tests/btrfs/266.out
@@ -0,0 +1,109 @@
+QA output created by 266
+step 1......mkfs.btrfs
+wrote 131072/131072 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 works
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa 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
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa 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
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa aa ................
+XXXXXXXX: aa aa aa aa aa aa aa aa aa 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
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
--
2.30.2
next prev parent reply other threads:[~2022-05-20 16:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-20 16:47 two more btrfs read repair tests Christoph Hellwig
2022-05-20 16:47 ` [PATCH 1/2] btrfs: test repair with sectors corrupted in multiple mirrors Christoph Hellwig
2022-05-21 2:02 ` Zorro Lang
2022-05-22 1:13 ` Anand Jain
2022-05-20 16:47 ` Christoph Hellwig [this message]
2022-05-22 1:13 ` [PATCH 2/2] btrfs: test repair with corrupted sectors interleaved over " Anand Jain
2022-05-22 6:31 ` Qu Wenruo
2022-05-22 12:56 ` Anand Jain
2022-05-22 13:00 ` Christoph Hellwig
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