Merge pull request #131 from shenmintao/fix/installer-usb-safety-main

fix: preserve existing installs on build failure and scope USB switching

AGENTS.md

@@ -0,0 +1,25 @@
+# 维护原则
+
+本文件适用于整个仓库。
+
+## 与上游保持一致
+
+- 对继承自 Radxa/AIC 上游的驱动、固件、加载协议和运行行为，默认保持一致，优先采用上游已经接受的修复。
+- 对这些上游组件，除非修复有证据支持的重要 bug，否则不引入会增加下游维护负担的改动。
+- 重要 bug 包括实际影响设备功能、稳定性、安全性或受支持内核构建的问题。仅凭代码风格、理论风险或“体验更好”不足以认定为重要 bug。
+- 修复应尽量小且独立，便于审查和同步未来上游版本。避免顺带重构、清理、增加功能或建立新的策略与兼容框架。
+
+## 本仓库维护的工具
+
+- 安装脚本、打包、诊断和文档应与上游驱动改动分开评估；不能仅因上游没有同类实现就否决。
+- 这些改动仍应简单、必要、有验证，避免不必要的默认行为和维护成本。
+- 试编译应评估失败时能否保住已有安装及额外编译耗时；固件备份应评估恢复价值、重复备份和磁盘占用，避免无限累积。它们本身不构成驱动或固件偏离上游。
+
+## PR 和 issue 处理
+
+- 先核实当前分支、上游实现和最新讨论，避免重复处理已合并或仍在等待实机验证的问题。
+- 不因 PR 使用了 AI、描述完整或声称测试通过而接受或拒绝；以可核实的问题、实际代码、独立验证及维护成本为依据。
+- 合入前说明问题的触发条件、影响、与上游的差异和验证结果；证据不足时继续保留为待验证项。
+- 编译通过、模拟测试和硬件测试必须明确区分，不得用前两者替代实机结论。
+- 涉及两个维护分支的必要修复应分别评估并同步，保留 `main` 与 `legacy-mcu1` 各自匹配的固件和加载配置，不能直接混合固件或整体合并分支。
+- 用户本次会话的明确指示优先于本文件。

INSTALL_SCRIPT.md

@@ -35,6 +35,14 @@ cannot download dependencies because the database is stale, run
 `sudo pacman -Syu` yourself, reboot if the kernel was updated, and rerun the
 installer with headers matching the running kernel.
 
+Before replacing installed firmware or DKMS modules, the installer cleans and
+test-builds a temporary copy of the driver for the running kernel. A test-build
+failure leaves the existing firmware, DKMS registration and installed source
+untouched. A successful installation compiles again through DKMS, so this check
+adds build time. Logs are written to `/var/log/aic8800-install.log` with mode
+`0644` after the root check. This check does not provide automatic rollback if a
+later installation step fails.
+
 The USB modules declare the complete firmware set shipped in `fw/`, including
 configuration files and extension patches, so initramfs tools can include those
 files when they include the modules. Rerun the installer after updating the

README.md

@@ -77,6 +77,11 @@ commands. Existing users must rerun `sudo ./install.sh` to replace the installed
 usb_modeswitch configuration, then unplug the adapter completely and plug it
 back in.
 
+Automatic switching requires the USB product string to start with `88M80`.
+Unrelated flash disks also use `1111:1111`, so that USB ID alone is not enough.
+If your adapter reports a different product string, verify its identity before
+trying the manual command below.
+
 If automatic switching does not occur, try the same sequence manually:
 
 ```bash

aic.rules

@@ -1,14 +1,18 @@
 # AIC8800 USB mass-storage mode switch rules
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5721",  SYMLINK+="aicudisk", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5721",  SYMLINK+="aicudisk", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5722",  SYMLINK+="aicudisk", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5722",  SYMLINK+="aicudisk", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5723",  SYMLINK+="tendaudisk", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5723",  SYMLINK+="tendaudisk", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5724",  SYMLINK+="ugreenax900", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5724",  SYMLINK+="ugreenax900", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5725",  SYMLINK+="tendaudiskv2", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5725",  SYMLINK+="tendaudiskv2", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5726",  SYMLINK+="tendaudiskv3", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5726",  SYMLINK+="tendaudiskv3", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5727",  SYMLINK+="tendaudiskv4", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="5727",  SYMLINK+="tendaudiskv4", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="572a",  SYMLINK+="tendaudiskv5", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="572a",  SYMLINK+="tendaudiskv5", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="572c",  SYMLINK+="cudydiskv2", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="572c",  SYMLINK+="cudydiskv2", RUN+="/usr/bin/eject /dev/%k"
-KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="572f",  SYMLINK+="aicudisk572f", RUN+="/usr/bin/eject /dev/%k"
+ACTION=="add", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="sd*", ATTRS{idVendor}=="a69c", ATTRS{idProduct}=="572f",  SYMLINK+="aicudisk572f", RUN+="/usr/bin/eject /dev/%k"
 
 # AIC8800D80 "Pandora" clone: switch 1111:1111 to its operational USB ID.
-ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="1111", ATTR{idProduct}=="1111", RUN+="/bin/sh -c 'if [ -x /usr/sbin/usb_modeswitch ]; then exec /usr/sbin/usb_modeswitch -c /etc/usb_modeswitch.d/1111:1111; elif [ -x /usr/bin/usb_modeswitch ]; then exec /usr/bin/usb_modeswitch -c /etc/usb_modeswitch.d/1111:1111; fi'"
+# 1111:1111 is a placeholder ID that other devices also report (some AIC
+# dongles expose a separate 1111:1111 "FLASH" driver disk next to an
+# already working Wi-Fi function), so only devices whose product string is
+# 88M80 are switched, and usb_modeswitch is pointed at this exact device.
+ACTION=="add", SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", ATTR{idVendor}=="1111", ATTR{idProduct}=="1111", ATTR{product}=="88M80*", RUN+="/bin/sh -c 'if [ -x /usr/sbin/usb_modeswitch ]; then exec /usr/sbin/usb_modeswitch -b $attr{busnum} -g $attr{devnum} -c /etc/usb_modeswitch.d/1111:1111; elif [ -x /usr/bin/usb_modeswitch ]; then exec /usr/bin/usb_modeswitch -b $attr{busnum} -g $attr{devnum} -c /etc/usb_modeswitch.d/1111:1111; fi'"

diagnostic_build.sh

@@ -19,7 +19,11 @@ NC='\033[0m'
 
 DRV_NAME="aic8800"
 DRV_VERSION="1.0.0"
+INSTALL_LOG="/var/log/aic8800-install.log"
+# Installers before this change wrote their log to /tmp.
+if [ ! -f "$INSTALL_LOG" ] && [ -f /tmp/aic8800d80_install.log ]; then
     INSTALL_LOG="/tmp/aic8800d80_install.log"
+fi
 
 read_dkms_conf_value() {
     local key="$1"

install.sh

@@ -24,7 +24,7 @@ readonly DRV_NAME="aic8800"
 readonly DRV_VERSION="1.0.0"
 readonly SRC_DIR="/usr/src/${DRV_NAME}-${DRV_VERSION}"
 readonly MODULE_NAME="aic8800_fdrv"
-readonly LOG_FILE="/tmp/aic8800d80_install.log"
+readonly LOG_FILE="/var/log/aic8800-install.log"
 
 # Script directory (where the script is located)
 readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
@@ -36,12 +36,7 @@ readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 log_message() {
     local level="$1"
     shift
-    # Garantir que o arquivo de log existe e tem permissões corretas
+    { echo "[$(date '+%Y-%m-%d %H:%M:%S')] [$level] $*" >> "$LOG_FILE"; } 2>/dev/null || true
-    if [ ! -f "$LOG_FILE" ]; then
-        touch "$LOG_FILE" 2>/dev/null || true
-        chmod 666 "$LOG_FILE" 2>/dev/null || true
-    fi
-    echo "[$(date '+%Y-%m-%d %H:%M:%S')] [$level] $*" >> "$LOG_FILE" 2>/dev/null || true
 }
 
 print_info() {
@@ -504,6 +499,30 @@ EOF
     print_success "DKMS configuration created."
 }
 
+#############################################################################
+# Pre-flight Build
+#############################################################################
+
+preflight_build() {
+    local build_root kver
+    kver="$(uname -r)"
+    print_step "Test-building the driver for $kver before replacing the existing installation..."
+
+    build_root=$(mktemp -d "${TMPDIR:-/tmp}/aic8800-preflight.XXXXXX")
+    # Use a private copy and clean it so a previous build cannot hide an error.
+    if cp -r "${SCRIPT_DIR}/drivers" "$build_root/" >> "$LOG_FILE" 2>&1 &&
+            make -C "$build_root/drivers/aic8800" KVER="$kver" KDIR="/lib/modules/$kver/build" clean >> "$LOG_FILE" 2>&1 &&
+            make -C "$build_root/drivers/aic8800" KVER="$kver" KDIR="/lib/modules/$kver/build" >> "$LOG_FILE" 2>&1; then
+        rm -rf "$build_root"
+        print_success "Test build succeeded."
+    else
+        rm -rf "$build_root"
+        print_error "Test build failed for kernel $kver. Existing firmware and DKMS installation were not changed."
+        echo "See $LOG_FILE for the compiler output."
+        return 1
+    fi
+}
+
 #############################################################################
 # DKMS Installation
 #############################################################################
@@ -823,10 +842,13 @@ show_final_instructions() {
 #############################################################################
 
 main() {
-    # Initialize log file
+    # Step 1: Check root privileges (before touching the log, which lives in
-    rm -f "$LOG_FILE" 2>/dev/null || true
+    # /var/log and is written by root only)
-    touch "$LOG_FILE" 2>/dev/null || true
+    check_root
-    chmod 666 "$LOG_FILE" 2>/dev/null || true
+
+    # Initialize log file: owned by root, readable by all, never world-writable
+    rm -f "$LOG_FILE"
+    install -m 0644 /dev/null "$LOG_FILE"
 
     echo -e "${CYAN}"
     echo "╔════════════════════════════════════════════════════════════════╗"
@@ -839,9 +861,6 @@ main() {
     log_message "INFO" "Kernel: $(uname -r)"
     log_message "INFO" "Distribution: $(cat /etc/os-release 2>/dev/null | grep PRETTY_NAME | cut -d= -f2 | tr -d '"')"
     
-    # Step 1: Check root privileges
-    check_root
-    
     # Step 2: Check Secure Boot
     check_secure_boot
     
@@ -854,7 +873,8 @@ main() {
     # Step 5: Check kernel build tree
     check_kernel_build_tree
 
-    # Step 6: Install firmware
+    # Step 6: Test-build before changing installed firmware or DKMS modules
+    preflight_build
     install_firmware
     
     # Step 7: Create DKMS configuration

tests/installer/test_install.py

@@ -30,6 +30,8 @@ class InstallerTests(unittest.TestCase):
     def run_installer_function(self, name, stubs="", after=""):
         # Extract only the functions under test; never execute main().
         names = ["run_logged", "cleanup_on_error", name]
+        if name == "main" and re.search(r"(?m)^preflight_build\(\)", SOURCE):
+            names.insert(-1, "preflight_build")
         functions = []
         for function in names:
             match = re.search(r"(?ms)^" + function + r"\(\) \{.*?^\}", SOURCE)
@@ -42,6 +44,10 @@ class InstallerTests(unittest.TestCase):
 {SHELL_OPTIONS}
 SCRIPT_DIR={shlex.quote(str(self.root))}
 LOG_FILE="$SCRIPT_DIR/install.log"
+SRC_DIR="$SCRIPT_DIR/installed-source"
+TMPDIR="$SCRIPT_DIR/tmp"
+export TMPDIR
+mkdir -p "$TMPDIR"
 DRV_NAME=aic8800
 DRV_VERSION=1.0.0
 MODULE_NAME=aic8800_fdrv
@@ -50,6 +56,7 @@ print_info() {{ echo "$*"; }}
 print_success() {{ echo "$*"; }}
 print_warning() {{ echo "$*"; }}
 print_error() {{ echo "$*"; }}
+log_message() {{ :; }}
 dkms() {{ echo 'aic8800/1.0.0: installed'; }}
 lsmod() {{ :; }}
 aic_zlp_target_present() {{ return 1; }}
@@ -132,6 +139,123 @@ cleanup_legacy_bluetooth_config() {{ echo LEGACY_CLEANUP; }}
         self.assertFalse(old.exists())
         self.assertEqual((old.parent / "new.bin").read_bytes(), b"new")
 
+    def prepare_preflight(self):
+        source = self.root / "drivers" / "aic8800" / "source.c"
+        source.parent.mkdir(parents=True)
+        source.write_bytes(b"source")
+        old = self.firmware / "aic8800D80" / "old.bin"
+        old.parent.mkdir()
+        old.write_bytes(b"installed firmware")
+        installed = self.root / "installed-source" / "revision"
+        installed.parent.mkdir()
+        installed.write_bytes(b"installed source")
+        (self.root / "dkms-state").write_bytes(b"installed modules")
+        return r'''
+uname() { echo test-kernel; }
+check_root() { :; }
+check_secure_boot() { :; }
+detect_package_manager() { DETECTED_PKG_MANAGER=apt; }
+install_dependencies() { :; }
+check_kernel_build_tree() { :; }
+create_dkms_conf() { :; }
+refresh_initramfs() { :; }
+load_module() { :; }
+verify_installation() { :; }
+show_final_instructions() { echo FINAL_INSTRUCTIONS; }
+make() {
+    echo "MAKE $*" >> "$SCRIPT_DIR/events"
+    [ "$(cat "$2/source.c")" = source ] || return 99
+    case "$*" in
+        *' clean') return "${MAKE_CLEAN_STATUS:-0}" ;;
+    esac
+    echo built > "$2/source.c"
+    return "${MAKE_BUILD_STATUS:-0}"
+}
+install_firmware() {
+    echo FIRMWARE >> "$SCRIPT_DIR/events"
+    echo changed > "$SCRIPT_DIR/firmware/aic8800D80/old.bin"
+}
+install_via_dkms() {
+    echo DKMS >> "$SCRIPT_DIR/events"
+    echo changed > "$SRC_DIR/revision"
+    echo changed > "$SCRIPT_DIR/dkms-state"
+}
+'''
+
+    def assert_installation_preserved(self, result):
+        self.assertNotEqual(result.returncode, 0, result.stdout + result.stderr)
+        self.assertEqual((self.firmware / "aic8800D80/old.bin").read_bytes(), b"installed firmware")
+        self.assertEqual((self.root / "installed-source/revision").read_bytes(), b"installed source")
+        self.assertEqual((self.root / "dkms-state").read_bytes(), b"installed modules")
+        events = self.root / "events"
+        if events.exists():
+            self.assertNotIn("FIRMWARE", events.read_text())
+            self.assertNotIn("DKMS", events.read_text())
+        self.assertNotIn("FINAL_INSTRUCTIONS", result.stdout)
+        self.assertEqual(list((self.root / "tmp").iterdir()), [])
+
+    def test_failed_preflight_preserves_firmware_source_and_dkms(self):
+        stubs = self.prepare_preflight() + "\nMAKE_BUILD_STATUS=17\n"
+        result = self.run_installer_function("main", stubs)
+        self.assert_installation_preserved(result)
+        self.assertIn("Test build failed", result.stdout)
+        self.assertIn("MAKE", (self.root / "events").read_text())
+        self.assertEqual((self.root / "drivers/aic8800/source.c").read_bytes(), b"source")
+
+    def test_preflight_copy_failure_preserves_installation(self):
+        stubs = self.prepare_preflight() + "\ncp() { return 18; }\n"
+        result = self.run_installer_function("main", stubs)
+        self.assert_installation_preserved(result)
+        self.assertFalse((self.root / "events").exists())
+
+    def test_preflight_clean_failure_preserves_installation(self):
+        stubs = self.prepare_preflight() + "\nMAKE_CLEAN_STATUS=19\n"
+        result = self.run_installer_function("main", stubs)
+        self.assert_installation_preserved(result)
+        self.assertEqual(len((self.root / "events").read_text().splitlines()), 1)
+
+    def test_preflight_success_precedes_installation_and_cleans_temp(self):
+        result = self.run_installer_function("main", self.prepare_preflight())
+        self.assertEqual(result.returncode, 0, result.stdout + result.stderr)
+        events = (self.root / "events").read_text().splitlines()
+        self.assertEqual(len(events), 4)
+        self.assertTrue(events[0].endswith(" clean"), events)
+        self.assertTrue(events[1].startswith("MAKE "), events)
+        self.assertEqual(events[2:], ["FIRMWARE", "DKMS"])
+        for line in events[:2]:
+            self.assertIn(str(self.root / "tmp"), line)
+            self.assertIn("KVER=test-kernel KDIR=/lib/modules/test-kernel/build", line)
+        self.assertEqual((self.root / "drivers/aic8800/source.c").read_bytes(), b"source")
+        self.assertEqual(list((self.root / "tmp").iterdir()), [])
+        self.assertIn("FINAL_INSTRUCTIONS", result.stdout)
+
+    def test_log_replaces_symlink_without_overwriting_target(self):
+        stubs = self.prepare_preflight()
+        target = self.root / "keep.log"
+        target.write_bytes(b"keep this file")
+        (self.root / "install.log").symlink_to(target)
+        result = self.run_installer_function("main", stubs)
+        self.assertEqual(result.returncode, 0, result.stdout + result.stderr)
+        self.assertEqual(target.read_bytes(), b"keep this file")
+        log = self.root / "install.log"
+        self.assertFalse(log.is_symlink())
+        self.assertEqual(log.stat().st_mode & 0o777, 0o644)
+
+    def test_root_check_precedes_log_changes(self):
+        stubs = self.prepare_preflight() + "\ncheck_root() { return 20; }\n"
+        log = self.root / "install.log"
+        log.write_bytes(b"previous log")
+        result = self.run_installer_function("main", stubs)
+        self.assert_installation_preserved(result)
+        self.assertEqual(log.read_bytes(), b"previous log")
+        self.assertFalse((self.root / "events").exists())
+
+    def test_log_creation_failure_stops_before_preflight(self):
+        stubs = self.prepare_preflight() + "\ninstall() { return 21; }\n"
+        result = self.run_installer_function("main", stubs)
+        self.assert_installation_preserved(result)
+        self.assertFalse((self.root / "events").exists())
+
 
 if __name__ == "__main__":
     unittest.main(verbosity=2)

tests/installer/test_udev.py

@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+"""Check device/event selection using fixtures; does not switch real devices.
+
+This models the basic equality/glob predicates used by aic.rules. Run
+udevadm verify separately to validate syntax with the real udev parser.
+"""
+
+from fnmatch import fnmatchcase
+from pathlib import Path
+import re
+import unittest
+
+
+RULES = (Path(__file__).resolve().parents[2] / "aic.rules").read_text().splitlines()
+
+
+def matching_rules(device):
+    result = []
+    for rule in RULES:
+        if not rule.strip() or rule.lstrip().startswith("#"):
+            continue
+        predicates = re.findall(r'([A-Z]+(?:\{[^}]+\})?)=="([^"]*)"', rule)
+        if predicates and all(fnmatchcase(device.get(key, ""), value) for key, value in predicates):
+            result.append(rule)
+    return result
+
+
+class UdevTests(unittest.TestCase):
+    def pandora(self, **changes):
+        device = {"ACTION": "add", "SUBSYSTEM": "usb", "ENV{DEVTYPE}": "usb_device",
+                  "ATTR{idVendor}": "1111", "ATTR{idProduct}": "1111", "ATTR{product}": "88M80"}
+        device.update(changes)
+        return device
+
+    def test_88m80_uses_event_bus_and_device_numbers(self):
+        for product in ("88M80", "88M80 USB WiFi"):
+            with self.subTest(product=product):
+                matches = matching_rules(self.pandora(**{"ATTR{product}": product}))
+                self.assertEqual(len(matches), 1)
+                # Both possible usb_modeswitch executable locations target this event's device.
+                self.assertEqual(matches[0].count("-b $attr{busnum} -g $attr{devnum}"), 2)
+
+    def test_generic_1111_flash_disk_is_not_switched(self):
+        for product in ("FLASH UDISK 2.30", "USB DISK", ""):
+            with self.subTest(product=product):
+                self.assertEqual(matching_rules(self.pandora(**{"ATTR{product}": product})), [])
+
+    def test_wrong_ids_interfaces_and_non_add_events_are_not_switched(self):
+        for changes in ({"ACTION": "change"}, {"ACTION": "remove"},
+                        {"ENV{DEVTYPE}": "usb_interface"}, {"ATTR{idVendor}": "2222"},
+                        {"ATTR{idProduct}": "8d80"}):
+            with self.subTest(changes=changes):
+                self.assertEqual(matching_rules(self.pandora(**changes)), [])
+
+    def test_eject_only_on_add_of_a_whole_supported_disk(self):
+        for product in ("5721", "5722", "5723", "5724", "5725", "5726", "5727", "572a", "572c", "572f"):
+            disk = {"ACTION": "add", "SUBSYSTEM": "block", "ENV{DEVTYPE}": "disk", "KERNEL": "sdb",
+                    "ATTRS{idVendor}": "a69c", "ATTRS{idProduct}": product}
+            with self.subTest(product=product):
+                matches = matching_rules(disk)
+                self.assertEqual(len(matches), 1)
+                self.assertIn('/usr/bin/eject /dev/%k', matches[0])
+                for changes in ({"ACTION": "change"}, {"ACTION": "remove"},
+                                {"ENV{DEVTYPE}": "partition", "KERNEL": "sdb1"}):
+                    self.assertEqual(matching_rules(dict(disk, **changes)), [])
+
+
+if __name__ == "__main__":
+    unittest.main(verbosity=2)