test code v1

2026-08-13 10:44:59 +02:00
commit f3b1165f19
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+# Test Case: Concurrent Reads
+
+**Test ID**: TC126-concurrent-reads  
+**Category**: Boundary & Stress  
+**Priority**: High  
+**Regression**: None
+
+## Objective
+
+Verify 16 simultaneous full-file reads, with every PID, exit code, expected
+source hash, and mounted-file hash recorded and checkable.
+
+## Preconditions
+
+- Complete `G7-MANUAL-SETUP.md` and verify the workload source inventory.
+
+## Manual Steps
+
+```sh
+G7=/root/repo22-g7
+FIX=$G7/fixtures
+SRC=$FIX/sources/workloads/concurrent
+IMAGE=$FIX/images/workloads.erofs
+MNT=/mnt/repo22-g7-tc126
+E=$G7/evidence/TC126
+mkdir -p "$MNT" "$E"
+unit=$(mdconfig -a -t vnode -f "$IMAGE")
+mount -t erofs -o ro "/dev/$unit" "$MNT"
+: > "$E/pids.tsv"
+index=0
+while [ "$index" -lt 16 ]; do
+  file=$(printf 'reader-%02d.bin' "$index")
+  expected=$(sha256 -q "$SRC/$file")
+  (
+    actual=$(sha256 -q "$MNT/concurrent/$file")
+    printf 'worker=%02d file=%s expected=%s actual=%s\n' \
+      "$index" "$file" "$expected" "$actual"
+    test "$actual" = "$expected"
+  ) > "$E/worker-$(printf '%02d' "$index").log" 2>&1 &
+  pid=$!
+  printf '%02d\t%s\n' "$index" "$pid" >> "$E/pids.tsv"
+  index=$((index + 1))
+done
+failed=0
+: > "$E/waits.tsv"
+while IFS="$(printf '\t')" read -r worker pid; do
+  wait "$pid"
+  rc=$?
+  printf '%s\t%s\t%s\n' "$worker" "$pid" "$rc" >> "$E/waits.tsv"
+  test "$rc" -eq 0 || failed=$((failed + 1))
+done < "$E/pids.tsv"
+cat "$E/pids.tsv" "$E/waits.tsv" "$E"/worker-*.log
+test "$failed" -eq 0
+test "$(wc -l < "$E/pids.tsv" | tr -d ' ')" -eq 16
+test "$(wc -l < "$E/waits.tsv" | tr -d ' ')" -eq 16
+alive=0
+while IFS="$(printf '\t')" read -r worker pid; do
+  if kill -0 "$pid" 2>/dev/null; then
+    printf 'still-alive worker=%s pid=%s\n' "$worker" "$pid"
+    alive=$((alive + 1))
+  fi
+done < "$E/pids.tsv"
+test "$alive" -eq 0
+umount "$MNT"
+mdconfig -d -u "${unit#md}"
+test -z "$(mount -p | awk -v m="$MNT" '$2 == m { print }')"
+test -z "$(mdconfig -l | tr ' ' '\n' | grep -x "$unit")"
+```
+
+## PASS Gate
+
+- Exactly 16 PIDs and 16 waits are recorded; every wait exit code is 0.
+- Every worker log contains identical expected/source and actual/mounted
+  SHA256 values.
+- None of the recorded PIDs remains alive; no `killall` or unrelated-process
+  cleanup is used.
+- No deadlock, panic, hang, dmesg error, mount leak, or provider leak occurs.