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Fix JSON state save corruption and packet pacing audit (v1.3.2)
- Fix unquoted string values in ring_buffers (Mini:, push, n/a, etc.) - Fix unquoted nm_mtu values (auto, etc.) - Sanitize ring buffer values to ensure numeric or properly quoted - Strip newlines from qdisc string to prevent JSON corruption - Fix packet pacing audit: now detects actual qdisc state vs flags - Add repair-state-json.sh utility to fix existing corrupted files Resolves invalid JSON errors in --save-state/--restore-state and fixes false 'pacing not applied' messages in --mode audit. Version bumped to 1.3.2 with updated CHANGELOG.
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‎docs/perfsonar/tools_scripts/CHANGELOG.md‎

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@@ -1,3 +1,27 @@
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## [1.3.2] - 2025-12-16
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### Fixed
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- **Critical JSON state save corruption fix**: Fixed invalid JSON generation in `--save-state` that caused `--restore-state` to fail
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- Properly quote non-numeric ring buffer values (e.g., `Mini:`, `push`, `n/a`)
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- Properly quote non-numeric `nm_mtu` values (e.g., `auto`)
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- Sanitize ring buffer values to ensure numeric-only or properly quoted strings
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- Strip embedded newlines from qdisc strings that corrupted JSON structure
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- **Fixed packet pacing audit detection**: `--mode audit` now correctly detects if packet pacing is already applied by checking actual qdisc state instead of relying on command-line flags
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- Added `repair-state-json.sh` utility script to repair existing corrupted JSON state files
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### Changed
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- Enhanced JSON generation in `capture_interface_state()` with proper type validation
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- Ring buffer values now validated as numeric before embedding in JSON
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- Non-numeric values are quoted as strings
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- Summary now checks system state for packet pacing instead of flag state
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### Notes
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- Users with existing corrupted state files can repair them using `repair-state-json.sh <file.json>`
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- The script creates backups before repair and validates output with `jq` or Python
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## [1.1.3] - 2025-12-06
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### Fixed

‎docs/perfsonar/tools_scripts/fasterdata-tuning.sh‎

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@@ -1,7 +1,7 @@
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#!/usr/bin/env bash
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# fasterdata-tuning.sh
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# --------------------
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# Version: 1.3.1
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# Version: 1.3.2
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# Author: Shawn McKee, University of Michigan
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# Acknowledgements: Supported by IRIS-HEP and OSG-LHC
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#
@@ -13,6 +13,8 @@
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# optional tbf interface cap via --use-tbf-cap/--tbf-cap-rate;
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# audit recognizes fq and tbf; fq shown green, tbf cyan.
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# NEW in v1.3.1: Skip checksum validation on bond/VLAN interfaces (they delegate to member NICs).
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# NEW in v1.3.2: Fix JSON state save corruption: properly quote ring buffer and nm_mtu values,
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# sanitize non-numeric values, strip newlines from qdisc strings.
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#
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# Sources: https://fasterdata.es.net/host-tuning/ , /network-tuning/ , /DTN/
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#
@@ -2101,7 +2103,7 @@ capture_interface_state() {
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# Get qdisc
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local qdisc_full
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qdisc_full=$(tc qdisc show dev "$iface" 2>/dev/null | head -n1 || echo "unknown")
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qdisc_full=$(tc qdisc show dev "$iface" 2>/dev/null | head -n1 | tr '\n' ' ' | sed 's/[[:space:]]*$//' || echo "unknown")
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# Build JSON
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local json="{"
@@ -2137,10 +2139,15 @@ capture_interface_state() {
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tx_max=$(echo "$ring_info" | awk '/^TX:/ {print $2; exit}' || echo "0")
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json+="\"ring_buffers\":{"
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json+="\"rx\":${rx_cur:-0},"
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json+="\"rx_max\":${rx_max:-0},"
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json+="\"tx\":${tx_cur:-0},"
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json+="\"tx_max\":${tx_max:-0}"
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# Handle non-numeric ring buffer values (e.g., "Mini:", empty strings)
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rx_cur=$(echo "${rx_cur:-0}" | grep -E '^[0-9]+$' || echo "0")
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rx_max=$(echo "${rx_max:-0}" | grep -E '^[0-9]+$' || echo "0")
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tx_cur=$(echo "${tx_cur:-0}" | grep -E '^[0-9]+$' || echo "0")
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tx_max=$(echo "${tx_max:-0}" | grep -E '^[0-9]+$' || echo "0")
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json+="\"rx\":${rx_cur},"
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json+="\"rx_max\":${rx_max},"
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json+="\"tx\":${tx_cur},"
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json+="\"tx_max\":${tx_max}"
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json+="},"
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else
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json+="\"ethtool_features\":{},"
@@ -2156,7 +2163,12 @@ capture_interface_state() {
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if [[ -n "$nm_conn" ]]; then
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local nm_mtu
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nm_mtu=$(nmcli -t -f 802-3-ethernet.mtu connection show "$nm_conn" 2>/dev/null | cut -d: -f2 || echo "0")
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json+="\"nm_mtu\":${nm_mtu:-0}"
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# Handle non-numeric nm_mtu values (e.g., "auto")
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if echo "$nm_mtu" | grep -qE '^[0-9]+$'; then
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json+="\"nm_mtu\":${nm_mtu}"
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else
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json+="\"nm_mtu\":\"${nm_mtu}\""
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fi
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else
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json+="\"nm_mtu\":0"
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fi
@@ -3041,12 +3053,29 @@ print_summary() {
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printf "\nSummary:\n"
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echo "- Target type: $TARGET_TYPE"
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if [[ "$TARGET_TYPE" == "dtn" ]]; then
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if [[ $APPLY_PACKET_PACING -eq 1 ]]; then
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if [[ $USE_TBF_CAP -eq 1 || -n "$TBF_CAP_RATE" ]]; then
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local disp_rate
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disp_rate="$TBF_CAP_RATE"
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[[ -z "$disp_rate" ]] && disp_rate="<auto-fraction-of-link>"
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echo "- Packet pacing: ENABLED (qdisc=tbf, rate=$disp_rate)"
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# Check if pacing is actually applied by examining qdisc on interfaces
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local has_pacing=0
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local pacing_type=""
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local ifs
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ifs=$(get_ifaces)
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for iface in $ifs; do
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local current_qdisc
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current_qdisc=$(tc qdisc show dev "$iface" 2>/dev/null | head -n1 || echo "")
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local qdisc_type="${current_qdisc%% *}"
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if [[ "$qdisc_type" == "fq" ]]; then
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has_pacing=1
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pacing_type="fq"
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break
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elif [[ "$qdisc_type" == "tbf" ]]; then
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has_pacing=1
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pacing_type="tbf"
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break
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fi
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done
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if [[ $has_pacing -eq 1 ]]; then
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if [[ "$pacing_type" == "tbf" ]]; then
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echo "- Packet pacing: ENABLED (qdisc=tbf)"
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else
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echo "- Packet pacing: ENABLED (qdisc=fq)"
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fi

‎docs/perfsonar/tools_scripts/repair-state-json.sh‎

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#!/usr/bin/env bash
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# repair-state-json.sh
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# --------------------
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# Repair corrupted JSON state files from fasterdata-tuning.sh versions < 1.3.2
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#
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# This script fixes common JSON formatting issues:
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# - Unquoted string values (e.g., :Mini: -> :"Mini:", :auto -> :"auto", :push -> :"push")
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# - Newlines embedded in string values
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# - Other common JSON formatting errors
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#
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# Usage: repair-state-json.sh <input.json> [output.json]
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# If output.json is omitted, creates input.json.repaired
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set -euo pipefail
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usage() {
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cat <<EOF
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Usage: $0 <input.json> [output.json]
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Repair corrupted JSON state files from fasterdata-tuning.sh.
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Arguments:
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input.json The corrupted JSON file to repair
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output.json Output file (default: input.json.repaired)
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The script creates a backup at input.json.backup before repair.
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EOF
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exit 1
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}
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if [[ $# -lt 1 || $# -gt 2 ]]; then
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usage
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fi
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INPUT_FILE="$1"
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OUTPUT_FILE="${2:-${INPUT_FILE}.repaired}"
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if [[ ! -f "$INPUT_FILE" ]]; then
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echo "ERROR: Input file not found: $INPUT_FILE" >&2
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exit 1
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fi
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# Create backup
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BACKUP_FILE="${INPUT_FILE}.backup"
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if [[ -f "$BACKUP_FILE" ]]; then
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echo "WARNING: Backup file already exists: $BACKUP_FILE"
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echo "Press Enter to overwrite or Ctrl-C to cancel..."
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read -r
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fi
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cp "$INPUT_FILE" "$BACKUP_FILE"
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echo "Created backup: $BACKUP_FILE"
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# Copy input to output for processing
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cp "$INPUT_FILE" "$OUTPUT_FILE"
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# Apply fixes
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echo "Applying JSON repairs..."
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# Fix 1: Quote unquoted 'Mini:' values (ring buffer issue)
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# Pattern: :"rx":Mini: -> :"rx":"Mini"
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sed -i 's/:Mini:/:Mini/g' "$OUTPUT_FILE"
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sed -i 's/:Mini\([,}]\)/:"Mini"\1/g' "$OUTPUT_FILE"
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# Fix 2: Quote 'auto' values (nm_mtu issue)
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# Pattern: :"nm_mtu":auto -> :"nm_mtu":"auto"
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sed -i 's/:"nm_mtu":auto\([,}]\)/:"nm_mtu":"auto"\1/g' "$OUTPUT_FILE"
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# Fix 3: Quote 'push' values (ring buffer issue)
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# Pattern: :"tx":push -> :"tx":"push"
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sed -i 's/:push\([,}]\)/:"push"\1/g' "$OUTPUT_FILE"
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# Fix 4: Quote other common non-numeric ring buffer values
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sed -i 's/:n\/a\([,}]\)/:"n\/a"\1/gi' "$OUTPUT_FILE"
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sed -i 's/:N\/A\([,}]\)/:"N\/A"\1/g' "$OUTPUT_FILE"
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sed -i 's/:not available\([,}]\)/:"not available"\1/gi' "$OUTPUT_FILE"
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sed -i 's/:unknown\([,}]\)/:"unknown"\1/g' "$OUTPUT_FILE"
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# Fix 5: Remove embedded newlines in JSON strings
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# This is trickier - we'll use Python if available
81+
if command -v python3 >/dev/null 2>&1; then
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echo "Using Python to fix embedded newlines..."
83+
python3 <<'PYEOF' "$OUTPUT_FILE"
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import sys
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import re
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if len(sys.argv) < 2:
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sys.exit(1)
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filename = sys.argv[1]
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try:
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with open(filename, 'r') as f:
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content = f.read()
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# Remove newlines that appear inside string values
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# This is a simplified approach - look for newlines between quotes
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# that aren't preceded by proper JSON structure
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# First, try to identify and fix obvious cases:
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# A newline followed by non-whitespace that's not a valid JSON start
102+
fixed = re.sub(r'"\s*\n\s*([^"{}\[\]:,])', r'" \1', content)
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104+
with open(filename, 'w') as f:
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f.write(fixed)
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print("Fixed embedded newlines")
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except Exception as e:
109+
print(f"Warning: Could not fix newlines: {e}", file=sys.stderr)
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PYEOF
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else
112+
echo "Python3 not available - skipping newline repair"
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echo "Manual review may be needed for embedded newlines"
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fi
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# Validate JSON
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echo ""
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echo "Validating repaired JSON..."
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if command -v jq >/dev/null 2>&1; then
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if jq empty "$OUTPUT_FILE" 2>/dev/null; then
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echo "✓ JSON is valid!"
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echo ""
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echo "Repaired file: $OUTPUT_FILE"
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echo "Original backup: $BACKUP_FILE"
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# Optionally pretty-print
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if jq . "$OUTPUT_FILE" > "${OUTPUT_FILE}.tmp" 2>/dev/null; then
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mv "${OUTPUT_FILE}.tmp" "$OUTPUT_FILE"
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echo "✓ Formatted JSON for readability"
131+
fi
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else
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echo "✗ JSON validation failed"
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echo ""
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echo "Attempting to show errors:"
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jq empty "$OUTPUT_FILE" 2>&1 || true
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echo ""
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echo "The file may need manual repair. Check:"
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echo " - Backup: $BACKUP_FILE"
140+
echo " - Partial repair: $OUTPUT_FILE"
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exit 1
142+
fi
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elif command -v python3 >/dev/null 2>&1; then
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if python3 -m json.tool "$OUTPUT_FILE" > /dev/null 2>&1; then
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echo "✓ JSON is valid (validated with Python)!"
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echo ""
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echo "Repaired file: $OUTPUT_FILE"
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echo "Original backup: $BACKUP_FILE"
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else
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echo "✗ JSON validation failed"
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echo ""
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python3 -m json.tool "$OUTPUT_FILE" 2>&1 || true
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echo ""
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echo "The file may need manual repair. Check:"
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echo " - Backup: $BACKUP_FILE"
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echo " - Partial repair: $OUTPUT_FILE"
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exit 1
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fi
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else
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echo "⚠ Cannot validate JSON (jq and python3 not available)"
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echo "Repair attempted, but validation skipped"
162+
echo ""
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echo "Repaired file: $OUTPUT_FILE"
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echo "Original backup: $BACKUP_FILE"
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fi
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echo ""
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echo "Done!"

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