# USB-SSD Management System - Udev Rules
# Automatische Erkennung und Mounting von USB-C SSDs
# 
# Installation:
# sudo cp 99-ssd-automount.rules /etc/udev/rules.d/
# sudo udevadm control --reload-rules
# sudo udevadm trigger

# ============================================================================
# USB Storage Device Detection
# ============================================================================

# USB Mass Storage Devices - Automatische Erkennung
SUBSYSTEM=="block", ATTRS{removable}=="1", ENV{ID_BUS}=="usb", ACTION=="add", \
    RUN+="/usr/local/bin/ssd-detect.sh --device %k --udev-mode"

# USB Storage Devices - Entfernung
SUBSYSTEM=="block", ATTRS{removable}=="1", ENV{ID_BUS}=="usb", ACTION=="remove", \
    RUN+="/usr/local/bin/ssd-safe-eject.sh --device %k --udev-mode"

# ============================================================================
# NTFS Filesystem Detection
# ============================================================================

# NTFS Partitionen - Automatisches Mounting
SUBSYSTEM=="block", ENV{ID_FS_TYPE}=="ntfs", ENV{ID_BUS}=="usb", ACTION=="add", \
    ATTRS{removable}=="1", \
    RUN+="/usr/local/bin/ssd-mount-manager.sh mount --device /dev/%k --auto-mount"

# exFAT Partitionen - Alternative Unterstützung
SUBSYSTEM=="block", ENV{ID_FS_TYPE}=="exfat", ENV{ID_BUS}=="usb", ACTION=="add", \
    ATTRS{removable}=="1", \
    RUN+="/usr/local/bin/ssd-mount-manager.sh mount --device /dev/%k --auto-mount"

# ============================================================================
# Device Permissions und Ownership
# ============================================================================

# USB Storage Devices - Berechtigungen setzen
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    GROUP="disk", MODE="0660"

# Device-Nodes für SSD-Management Gruppe
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ENV{ID_FS_TYPE}=="ntfs|exfat", \
    GROUP="ssd-users", MODE="0664"

# ============================================================================
# Symlink Creation
# ============================================================================

# Persistente Symlinks basierend auf UUID
SUBSYSTEM=="block", ENV{ID_FS_UUID}!="", ENV{ID_BUS}=="usb", \
    ATTRS{removable}=="1", \
    SYMLINK+="disk/by-ssd-uuid/$env{ID_FS_UUID}"

# Symlinks basierend auf Label
SUBSYSTEM=="block", ENV{ID_FS_LABEL}!="", ENV{ID_BUS}=="usb", \
    ATTRS{removable}=="1", \
    SYMLINK+="disk/by-ssd-label/$env{ID_FS_LABEL}"

# ============================================================================
# Spezifische Vendor/Product Rules
# ============================================================================

# Samsung USB-C SSDs
SUBSYSTEM=="block", ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="61f*", \
    ACTION=="add", \
    RUN+="/usr/local/bin/ssd-detect.sh --device %k --vendor samsung"

# SanDisk USB-C SSDs
SUBSYSTEM=="block", ATTRS{idVendor}=="0781", ATTRS{idProduct}=="55*", \
    ACTION=="add", \
    RUN+="/usr/local/bin/ssd-detect.sh --device %k --vendor sandisk"

# Generic USB 3.0+ Storage
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{bcdUSB}=="0300|0310|0320", \
    ATTRS{removable}=="1", ACTION=="add", \
    RUN+="/usr/local/bin/ssd-detect.sh --device %k --usb3-mode"

# ============================================================================
# Environment Variables für Scripts
# ============================================================================

# Udev-Modus für alle SSD-Scripts
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ENV{SSD_UDEV_MODE}="true", \
    ENV{SSD_LOG_LEVEL}="INFO", \
    ENV{SSD_USE_SYSLOG}="true"

# Device-Informationen für Scripts
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ENV{SSD_DEVICE_PATH}="/dev/%k", \
    ENV{SSD_DEVICE_UUID}="$env{ID_FS_UUID}", \
    ENV{SSD_DEVICE_LABEL}="$env{ID_FS_LABEL}", \
    ENV{SSD_DEVICE_TYPE}="$env{ID_FS_TYPE}"

# ============================================================================
# Systemd Service Integration
# ============================================================================

# Systemd-Service für spezifische Devices starten
SUBSYSTEM=="block", ENV{ID_FS_TYPE}=="ntfs", ENV{ID_BUS}=="usb", \
    ATTRS{removable}=="1", ACTION=="add", \
    TAG+="systemd", ENV{SYSTEMD_WANTS}="ssd-mount@%k.service"

# Systemd-Service bei Device-Entfernung stoppen
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ACTION=="remove", \
    RUN+="/bin/systemctl stop ssd-mount@%k.service"

# ============================================================================
# Logging und Debugging
# ============================================================================

# Debug-Informationen loggen (nur bei Debug-Modus)
# SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
#     RUN+="/usr/bin/logger -t udev-ssd 'Device %k: Action=%E{ACTION}, Type=%E{ID_FS_TYPE}, UUID=%E{ID_FS_UUID}'"

# ============================================================================
# Sicherheits-Rules
# ============================================================================

# Nur autorisierte Benutzer können auf SSD-Devices zugreifen
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ENV{ID_FS_TYPE}=="ntfs|exfat", \
    TEST!="/etc/ssd-management/authorized_users", \
    GROUP="root", MODE="0600"

# Blacklist für bekannte problematische Devices
SUBSYSTEM=="block", ATTRS{idVendor}=="0000", ATTRS{idProduct}=="0000", \
    ENV{UDISKS_IGNORE}="1"

# ============================================================================
# Performance-Optimierungen
# ============================================================================

# I/O-Scheduler für USB-SSDs optimieren
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ATTR{queue/scheduler}="mq-deadline"

# Read-Ahead für USB-SSDs optimieren
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ATTR{queue/read_ahead_kb}="1024"

# ============================================================================
# Cleanup und Maintenance
# ============================================================================

# Alte Mount-Points bereinigen bei Device-Entfernung
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ACTION=="remove", \
    RUN+="/usr/local/bin/ssd-mount-manager.sh cleanup --device %k"

# Temporäre Dateien bereinigen
SUBSYSTEM=="block", ENV{ID_BUS}=="usb", ATTRS{removable}=="1", \
    ACTION=="remove", \
    RUN+="/bin/rm -f /tmp/ssd-%k-*"