anthony.wen
bb1cb37dc2
Add the cdssync migration test dataset manifest, generator script, workspace instructions, and gitignore. This sets the default workflow to: - generate the dataset locally - copy it to the test machine with metadata preserved - verify the copied data before migration testing
276 lines
8.4 KiB
Bash
Executable File
276 lines
8.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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usage() {
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cat <<'EOF'
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Usage:
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generate_migration_test_dataset.sh TARGET_DIR
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Creates a compact filesystem migration test dataset under TARGET_DIR.
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The dataset matches the manifest in migration-test-manifest.md.
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Notes:
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- Existing TARGET_DIR contents are left in place unless they collide.
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- ACL and xattr cases are created only if the local tools are available.
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- Sparse files are created with logical size but low physical allocation.
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EOF
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}
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if [[ $# -ne 1 ]]; then
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usage
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exit 1
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fi
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TARGET_DIR=$1
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ROOT=$(realpath -m "$TARGET_DIR")
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mkdir -p "$ROOT"
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have_setfacl=0
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have_setfattr=0
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if command -v setfacl >/dev/null 2>&1; then
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have_setfacl=1
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fi
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if command -v setfattr >/dev/null 2>&1; then
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have_setfattr=1
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fi
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create_dir() {
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mkdir -p "$ROOT/$1"
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}
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set_times() {
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local rel=$1
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local stamp=$2
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touch -a -m -t "$stamp" "$ROOT/$rel"
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}
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write_text() {
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local path=$1
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local mib=$2
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local bytes=$((mib * 1024 * 1024))
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perl -e '
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my ($target, $label) = @ARGV;
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my $chunk = "Migration text payload for $label\n";
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while (length($chunk) < 8192) { $chunk .= $chunk; }
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while ($target > 0) {
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my $part = substr($chunk, 0, $target > length($chunk) ? length($chunk) : $target);
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print $part;
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$target -= length($part);
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}
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' "$bytes" "$path" >"$ROOT/$path"
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}
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write_compressible() {
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local path=$1
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local mib=$2
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local bytes=$((mib * 1024 * 1024))
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perl -e '
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my ($target) = @ARGV;
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my $chunk = "A" x 8192;
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while ($target > 0) {
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my $part = substr($chunk, 0, $target > length($chunk) ? length($chunk) : $target);
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print $part;
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$target -= length($part);
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}
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' "$bytes" >"$ROOT/$path"
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}
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write_random() {
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local path=$1
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local mib=$2
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dd if=/dev/urandom of="$ROOT/$path" bs=1M count="$mib" status=none
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}
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write_script() {
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local path=$1
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local mib=$2
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cat >"$ROOT/$path" <<'EOF'
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#!/usr/bin/env bash
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echo "migration test script"
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EOF
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local current_size
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current_size=$(wc -c <"$ROOT/$path")
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local target_size=$((mib * 1024 * 1024))
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if (( current_size < target_size )); then
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dd if=/dev/zero bs=1 count=$((target_size - current_size)) status=none | tr '\0' '#' >>"$ROOT/$path"
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fi
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}
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write_empty() {
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: >"$ROOT/$1"
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}
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write_sparse() {
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local path=$1
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local mib=$2
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truncate -s "${mib}M" "$ROOT/$path"
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}
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apply_mode() {
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chmod "$2" "$ROOT/$1"
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}
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make_file() {
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local path=$1
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local type=$2
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local mib=$3
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local mode=$4
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create_dir "$(dirname "$path")"
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case "$type" in
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text) write_text "$path" "$mib" ;;
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random) write_random "$path" "$mib" ;;
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compressible) write_compressible "$path" "$mib" ;;
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script) write_script "$path" "$mib" ;;
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empty) write_empty "$path" ;;
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sparse) write_sparse "$path" "$mib" ;;
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*)
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echo "Unknown type: $type" >&2
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exit 1
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;;
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esac
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apply_mode "$path" "$mode"
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}
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create_base_dirs() {
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create_dir "regular"
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create_dir "hidden"
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create_dir "spaces in name"
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create_dir "deep/tree/level1/level2/level3"
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create_dir "readonly-dir"
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create_dir "links"
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create_dir "metadata"
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create_dir "empty-dirs/empty_a"
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create_dir "empty-dirs/empty_b"
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create_dir "empty-dirs/.hidden_empty_dir"
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create_dir "readonly-dir/no_write_subdir"
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}
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create_regular_files() {
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make_file "regular/text_1mb_644.txt" text 1 0644
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make_file "regular/text_3mb_600.txt" text 3 0600
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make_file "regular/text_5mb_755.txt" text 5 0755
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make_file "regular/random_1mb_600.bin" random 1 0600
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make_file "regular/random_3mb_644.bin" random 3 0644
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make_file "regular/random_5mb_755.bin" random 5 0755
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make_file "regular/compressible_1mb_644.log" compressible 1 0644
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make_file "regular/compressible_3mb_600.log" compressible 3 0600
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make_file "regular/compressible_5mb_755.log" compressible 5 0755
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make_file "regular/script_1mb_755.sh" script 1 0755
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make_file "regular/script_3mb_700.sh" script 3 0700
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make_file "regular/script_5mb_755.sh" script 5 0755
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make_file "regular/sparse_1mb_600.img" sparse 1 0600
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make_file "regular/sparse_3mb_600.img" sparse 3 0600
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make_file "regular/sparse_5mb_600.img" sparse 5 0600
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make_file "regular/empty_000_644.txt" empty 0 0644
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make_file "regular/empty_001_600.txt" empty 0 0600
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make_file "regular/empty_002_755.txt" empty 0 0755
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}
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create_named_variants() {
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make_file "hidden/.hidden_text_1mb_644.txt" text 1 0644
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make_file "hidden/.hidden_random_3mb_600.bin" random 3 0600
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make_file "hidden/.hidden_script_1mb_755.sh" script 1 0755
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make_file "hidden/.hidden_empty_644" empty 0 0644
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make_file "hidden/.hidden_sparse_5mb_600.img" sparse 5 0600
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make_file "spaces in name/file with spaces text 1mb 644.txt" text 1 0644
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make_file "spaces in name/file with spaces random 3mb 600.bin" random 3 0600
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make_file "spaces in name/file with spaces script 1mb 755.sh" script 1 0755
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make_file "spaces in name/file with spaces empty 644" empty 0 0644
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make_file "spaces in name/file with spaces sparse 5mb 600.img" sparse 5 0600
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make_file "regular/longname_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_text_1mb_644.txt" text 1 0644
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make_file "regular/longname_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb_random_3mb_600.bin" random 3 0600
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make_file "regular/longname_cccccccccccccccccccccccccccccccc_compressible_5mb_755.log" compressible 5 0755
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}
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create_deep_and_duplicate_cases() {
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make_file "deep/tree/level1/level2/level3/deep_text_1mb_644.txt" text 1 0644
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make_file "deep/tree/level1/level2/level3/deep_random_3mb_600.bin" random 3 0600
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make_file "deep/tree/level1/level2/level3/deep_script_1mb_755.sh" script 1 0755
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make_file "deep/tree/level1/level2/level3/deep_sparse_5mb_600.img" sparse 5 0600
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make_file "regular/dup_source_text_3mb_644.txt" text 3 0644
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cp "$ROOT/regular/dup_source_text_3mb_644.txt" "$ROOT/regular/dup_copy_a_text_3mb_600.txt"
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cp "$ROOT/regular/dup_source_text_3mb_644.txt" "$ROOT/deep/tree/level1/level2/dup_copy_b_text_3mb_755.txt"
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chmod 0600 "$ROOT/regular/dup_copy_a_text_3mb_600.txt"
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chmod 0755 "$ROOT/deep/tree/level1/level2/dup_copy_b_text_3mb_755.txt"
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}
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create_time_and_readonly_cases() {
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make_file "regular/old_text_1mb_644.txt" text 1 0644
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make_file "regular/recent_text_1mb_644.txt" text 1 0644
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make_file "regular/futureish_text_1mb_644.txt" text 1 0644
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set_times "regular/old_text_1mb_644.txt" 201801020304
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set_times "regular/recent_text_1mb_644.txt" 202604191530
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set_times "regular/futureish_text_1mb_644.txt" 203001020304
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make_file "readonly-dir/locked_text_1mb_444.txt" text 1 0444
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make_file "readonly-dir/locked_random_3mb_400.bin" random 3 0400
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make_file "readonly-dir/locked_script_1mb_500.sh" script 1 0500
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chmod 0555 "$ROOT/readonly-dir/no_write_subdir"
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}
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create_links() {
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ln -s ../regular/text_1mb_644.txt "$ROOT/links/symlink_to_text_1mb_644.txt"
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ln -s ../deep/tree/level1/level2/level3/deep_random_3mb_600.bin "$ROOT/links/symlink_to_deep_random_3mb_600.bin"
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ln -s ../hidden/.hidden_text_1mb_644.txt "$ROOT/links/symlink_to_hidden_file"
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ln "$ROOT/regular/random_3mb_644.bin" "$ROOT/links/hardlink_to_random_3mb_644.bin"
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ln "$ROOT/regular/compressible_5mb_755.log" "$ROOT/links/hardlink_to_compressible_5mb_755.log"
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}
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create_metadata_cases() {
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make_file "metadata/xattr_text_1mb_644.txt" text 1 0644
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make_file "metadata/xattr_random_3mb_600.bin" random 3 0600
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make_file "metadata/acl_text_1mb_644.txt" text 1 0644
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make_file "metadata/acl_script_1mb_755.sh" script 1 0755
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if (( have_setfattr )); then
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setfattr -n user.migration_case -v "xattr-text" "$ROOT/metadata/xattr_text_1mb_644.txt"
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setfattr -n user.migration_case -v "xattr-random" "$ROOT/metadata/xattr_random_3mb_600.bin"
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else
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echo "Skipping xattr assignment: setfattr not available"
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fi
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if (( have_setfacl )); then
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setfacl -m u:nobody:r-- "$ROOT/metadata/acl_text_1mb_644.txt"
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setfacl -m u:nobody:r-x "$ROOT/metadata/acl_script_1mb_755.sh"
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else
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echo "Skipping ACL assignment: setfacl not available"
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fi
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}
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write_summary() {
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cat >"$ROOT/GENERATION_SUMMARY.txt" <<EOF
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Dataset root: $ROOT
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Manifest: migration-test-manifest.md
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Optional metadata support:
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- setfacl available: $have_setfacl
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- setfattr available: $have_setfattr
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Notes:
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- Sparse files have logical size with low physical allocation.
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- Hard links share inode data with their source file.
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- Read-only files and directories may require elevated privileges to modify later.
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EOF
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}
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create_base_dirs
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create_regular_files
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create_named_variants
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create_deep_and_duplicate_cases
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create_time_and_readonly_cases
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create_links
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create_metadata_cases
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write_summary
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echo "Created migration test dataset at: $ROOT"
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