58 lines
1.6 KiB
Bash
Executable File
58 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
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# Test that any superblock is correctly detected and fixed by btrfs rescue
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source "$TEST_TOP/common"
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check_prereq btrfs
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check_prereq mkfs.btrfs
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check_prereq btrfs-select-super
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setup_root_helper
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prepare_test_dev 260G
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# Create the test file system.
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run_check $SUDO_HELPER "$TOP"/mkfs.btrfs -f "$TEST_DEV"
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function check_corruption {
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local sb_offset=$1
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local source_sb=$2
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# First we ensure we can mount it successfully
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run_check_mount_test_dev
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run_check_umount_test_dev
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# Now corrupt 1k of the superblock at sb_offset
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run_check $SUDO_HELPER dd bs=1K count=1 seek=$(($sb_offset + 1)) if=/dev/zero of="$TEST_DEV" conv=notrunc
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# if corrupting one of the sb copies, copy it over the initial superblock
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if [ ! -z "$source_sb" ]; then
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local shift_val=$((16 << $source_sb * 12 ))
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run_check $SUDO_HELPER dd bs=1K count=4 seek=64 skip="$shift_val" if="$TEST_DEV" of="$TEST_DEV" conv=notrunc
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fi
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# we can't use our mount helper, the following works for file image and
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# block device as TEST_DEV
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run_mustfail "mounted fs with corrupted superblock" \
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$SUDO_HELPER mount "$TEST_DEV" "$TEST_MNT"
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# Now run btrfs rescue which should fix the superblock. It uses 2
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# to signal success of recovery use mayfail to ignore that retval
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# but still log the output of the command
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run_mayfail $SUDO_HELPER "$TOP"/btrfs rescue super-recover -yv "$TEST_DEV"
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if [ $? != 2 ]; then
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_fail "couldn't rescue super"
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fi
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run_check_mount_test_dev
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run_check_umount_test_dev
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}
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# Corrupting first superblock
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check_corruption 64
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# Corrupting second superblock
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check_corruption 65536 1
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# Corrupting third superblock
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check_corruption 268435456 2
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