forked from Mirrors/btrfs-progs
118 lines
3.1 KiB
Bash
118 lines
3.1 KiB
Bash
#!/bin/bash
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source "$TEST_TOP/common"
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check_prereq btrfs-image
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# Check file list for leaf corruption, no regular/preallocated
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# file extent case.
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# Corrupted leaf is 20832256, which contains inode 1862~1872
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#
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# 1862, ref from leaf 20828160 key 24(DIR_ITEM)
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# 1863, ref from leaf 605388 item key 11(DIR_ITEM)
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# 1864, no ref to rebuild, no need to rebuild
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# 1865, ref from leaf 19767296 key 23(DIR_ITEM)
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# 1866-1868 no ref to rebuild, all refs in corrupted leaf
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# 1869, ref from leaf 4976640 key 22(DIR_ITEM)
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# 1870 no ref to rebuild, all refs in corrupted leaf
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# 1871, ref from leaf 19746816 key 38(DIR_ITEM)
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# 1872, ref from leaf 19767296 key 14(DIR_ITEM)
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# The list format is:
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# INO SIZE MODE NAME
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# INO: inode number
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# SIZE: file size, only checked for regular file
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# MODE: raw file mode, get from stat
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# NAME: file name
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leaf_no_data_ext_list=(
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1862 0 40700 "install.d"
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1862 0 40700 "install.d"
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1863 0 40700 "gdb"
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1865 0 40700 "iptables"
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1869 0 40700 "snmp"
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1871 0 100700 "machine-id"
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1872 0 100700 "adjtime"
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1877 0 40700 "del"
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)
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generate_leaf_corrupt_no_data_ext()
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{
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dest=$1
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_log "generating leaf_corrupt_no_data_ext.btrfs-image"
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tar --no-same-owner -xJf ./no_data_extent.tar.xz || \
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_fail "failed to extract leaf_corrupt_no_data_ext.btrfs-image"
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"$TOP/btrfs-image" -r test.img.btrfs-image "$dest" || \
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_fail "failed to extract leaf_corrupt_no_data_ext.btrfs-image"
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# leaf at 4206592 and 20905984 contains no regular data
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# extent, clear its csum to corrupt the leaf.
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for x in 4206592 20905984; do
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dd if=/dev/zero of="$dest" bs=1 count=32 conv=notrunc seek="$x" \
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1>/dev/null 2>&1
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done
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}
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check_inode()
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{
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path=$1
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ino=$2
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size=$3
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mode=$4
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name=$5
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# Check whether the inode exists
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exists=$($SUDO_HELPER find "$path" -inum "$ino")
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if [ -z "$exists" ]; then
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_fail "inode $ino not recovered correctly"
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fi
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# Check inode type
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found_mode=$(printf "%o" 0x$($SUDO_HELPER stat "$exists" -c %f))
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if [ "$found_mode" -ne "$mode" ]; then
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echo "$found_mode"
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_fail "inode $ino modes not recovered"
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fi
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# Check inode size
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found_size=$($SUDO_HELPER stat "$exists" -c %s)
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if [ $mode -ne 41700 -a "$found_size" -ne "$size" ]; then
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_fail "inode $ino size not recovered correctly"
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fi
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# Check inode name
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if [ "$(basename $exists)" != "$name" ]; then
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_fail "inode $ino name not recovered correctly"
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else
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return 0
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fi
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}
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# Check salvaged data in the recovered image
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check_leaf_corrupt_no_data_ext()
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{
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image=$1
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$SUDO_HELPER mount -o loop -t btrfs "$image" -o ro "$TEST_MNT"
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i=0
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while [ $i -lt ${#leaf_no_data_ext_list[@]} ]; do
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check_inode "$TEST_MNT/lost+found" \
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${leaf_no_data_ext_list[i]} \
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${leaf_no_data_ext_list[i + 1]} \
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${leaf_no_data_ext_list[i + 2]} \
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${leaf_no_data_ext_list[i + 3]} \
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${leaf_no_data_ext_list[i + 4]}
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((i+=4))
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done
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$SUDO_HELPER umount "$TEST_MNT"
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}
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setup_root_helper
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generate_leaf_corrupt_no_data_ext test.img
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check_image test.img
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check_leaf_corrupt_no_data_ext test.img
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rm test.img
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rm test.img.btrfs-image
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# Not used, its function is the same as generate_leaf_corrupt_no_data_ext()
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rm generate_image.sh
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