forked from Mirrors/btrfs-progs
85 lines
2.4 KiB
Bash
85 lines
2.4 KiB
Bash
#!/bin/bash
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# Corrupt a filesystem that is using freespace tree and then ensure that
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# btrfs check is able to repair it. This tests correct detection/repair of
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# both a FREE_SPACE_EXTENT based FST and a FREE_SPACE_BITMAP based FST.
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source "$TEST_TOP/common"
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setup_root_helper
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prepare_test_dev 256M
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check_prereq btrfs
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check_prereq mkfs.btrfs
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check_global_prereq grep
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check_global_prereq tail
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check_global_prereq head
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check_global_prereq cut
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# wrapper for btrfs-corrupt-item
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# $1: Type of item we want to corrupt - extent or bitmap
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corrupt_fst_item()
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{
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local type
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local objectid
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local offset
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type="$1"
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if [[ $type == "bitmap" ]]; then
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type=200
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objectid=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \
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grep -o "[[:digit:]]* FREE_SPACE_BITMAP [[:digit:]]*" | \
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cut -d' ' -f1 | tail -2 | head -1)
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offset=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \
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grep -o "[[:digit:]]* FREE_SPACE_BITMAP [[:digit:]]*" | \
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cut -d' ' -f3 | tail -2 | head -1)
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_log "Corrupting $objectid,FREE_SPACE_BITMAP,$offset"
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elif [[ $type == "extent" ]]; then
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type=199
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objectid=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \
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grep -o "[[:digit:]]* FREE_SPACE_EXTENT [[:digit:]]*" | \
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cut -d' ' -f1 | tail -2 | head -1)
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offset=$("$TOP/btrfs" inspect-internal dump-tree -t 10 "$TEST_DEV" | \
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grep -o "[[:digit:]]* FREE_SPACE_EXTENT [[:digit:]]*" | \
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cut -d' ' -f3 | tail -2 | head -1)
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_log "Corrupting $objectid,FREE_SPACE_EXTENT,$offset"
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else
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_fail "Unknown item type for corruption"
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fi
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run_check "$TOP/btrfs-corrupt-block" -r 10 -K "$objectid,$type,$offset" \
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-f offset "$TEST_DEV"
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}
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if ! [ -f "/sys/fs/btrfs/features/free_space_tree" ]; then
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_not_run "kernel does not support free-space-tree feature"
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exit
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fi
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run_check_mkfs_test_dev -n 4k
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run_check_mount_test_dev -oclear_cache,space_cache=v2
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# create files which will populate the FST
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for i in {0..9}; do
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for j in {1..300}; do
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run_check $SUDO_HELPER fallocate -l 4k "$TEST_MNT/file.$j$i" &
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done
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wait
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done
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run_check_umount_test_dev
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# now corrupt one of the bitmap items
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corrupt_fst_item "bitmap"
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check_image "$TEST_DEV"
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# change the freespace such that we now have at least one free_space_extent
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# object
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run_check_mount_test_dev
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rm -rf "$TEST_MNT/file.*"
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run_check $SUDO_HELPER fallocate -l 50m "$TEST_MNT/file"
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run_check_umount_test_dev
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# now corrupt an extent
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corrupt_fst_item "extent"
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check_image "$TEST_DEV"
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