BBeOS/docs/phases/PHASE_6_PACKAGING.md

Phase 6: Packaging & Updates System

🎯 Objectives

Develop a robust packaging and update system that provides secure, reliable system updates and application management for the BlackBerry Classic (Q20).

📋 Detailed Tasks

6.1 System Packaging Architecture

6.1.1 Root Filesystem Design

System Partition Layout:

# Partition structure
/dev/mmcblk0p1  - Bootloader (2MB)
/dev/mmcblk0p2  - Boot partition (32MB)
/dev/mmcblk0p3  - System A (1GB)
/dev/mmcblk0p4  - System B (1GB)
/dev/mmcblk0p5  - User data (12GB)
/dev/mmcblk0p6  - Recovery (256MB)
/dev/mmcblk0p7  - Cache (512MB)

System Components:

# System directory structure
/
├── bin/           # Essential binaries
├── boot/          # Boot files and kernel
├── dev/           # Device files
├── etc/           # Configuration files
├── home/          # User home directories
├── lib/           # Shared libraries
├── media/         # Mount points
├── mnt/           # Temporary mounts
├── opt/           # Optional applications
├── proc/          # Process information
├── root/          # Root user home
├── run/           # Runtime data
├── sbin/          # System binaries
├── srv/           # Service data
├── sys/           # System information
├── tmp/           # Temporary files
├── usr/           # User programs and data
└── var/           # Variable data

System Package Structure:

# Package format
package-name-version.tar.xz
├── metadata.json      # Package metadata
├── filesystem.tar.xz  # System files
├── kernel.tar.xz      # Kernel and modules
├── device-tree.dtb    # Device tree blob
└── scripts/           # Installation scripts
    ├── pre-install.sh
    ├── post-install.sh
    ├── pre-remove.sh
    └── post-remove.sh

6.1.2 Package Management System

Package Manager Design:

// Package manager structure
struct q20_package_manager {
    struct device *dev;
    
    // Package database
    struct q20_package_db *db;
    struct q20_package_cache *cache;
    
    // Installation state
    struct q20_installation_state *install_state;
    struct workqueue_struct *workqueue;
    
    // Package operations
    int (*install_package)(struct q20_package_manager *pm, const char *package_path);
    int (*remove_package)(struct q20_package_manager *pm, const char *package_name);
    int (*update_package)(struct q20_package_manager *pm, const char *package_name);
    int (*list_packages)(struct q20_package_manager *pm, struct list_head *packages);
    
    // Update management
    int (*check_updates)(struct q20_package_manager *pm);
    int (*download_update)(struct q20_package_manager *pm, const char *update_url);
    int (*install_update)(struct q20_package_manager *pm, const char *update_path);
};

// Package structure
struct q20_package {
    struct list_head list;
    char name[64];
    char version[32];
    char description[256];
    char maintainer[64];
    char license[32];
    
    // Dependencies
    struct list_head dependencies;
    struct list_head conflicts;
    struct list_head provides;
    
    // Files
    struct list_head files;
    size_t installed_size;
    size_t download_size;
    
    // Metadata
    time_t install_time;
    time_t build_time;
    char build_host[64];
    char architecture[16];
    
    // State
    enum package_state state;
    bool installed;
    bool essential;
};

// Package database
struct q20_package_db {
    struct device *dev;
    sqlite3 *db;
    char *db_path;
    
    // Database operations
    int (*add_package)(struct q20_package_db *db, struct q20_package *pkg);
    int (*remove_package)(struct q20_package_db *db, const char *name);
    int (*get_package)(struct q20_package_db *db, const char *name, struct q20_package *pkg);
    int (*list_packages)(struct q20_package_db *db, struct list_head *packages);
    int (*update_package)(struct q20_package_db *db, struct q20_package *pkg);
};

Package Installation Process:

// Package installation
static int q20_package_install(struct q20_package_manager *pm, const char *package_path)
{
    struct q20_package *pkg;
    struct q20_package *existing_pkg;
    int ret;
    
    // Load package metadata
    ret = q20_package_load_metadata(package_path, &pkg);
    if (ret)
        return ret;
    
    // Check if package is already installed
    existing_pkg = q20_package_db_get_package(pm->db, pkg->name);
    if (existing_pkg) {
        // Check if update is needed
        if (q20_package_version_compare(pkg->version, existing_pkg->version) <= 0) {
            dev_info(pm->dev, "Package %s is already up to date\n", pkg->name);
            q20_package_free(pkg);
            return 0;
        }
        
        // Remove old package
        ret = q20_package_remove_internal(pm, existing_pkg);
        if (ret)
            goto install_failed;
    }
    
    // Check dependencies
    ret = q20_package_check_dependencies(pm, pkg);
    if (ret)
        goto install_failed;
    
    // Run pre-install script
    ret = q20_package_run_script(pkg, "pre-install.sh");
    if (ret)
        goto install_failed;
    
    // Extract filesystem
    ret = q20_package_extract_filesystem(pkg, package_path);
    if (ret)
        goto install_failed;
    
    // Install kernel if needed
    if (q20_package_has_kernel(pkg)) {
        ret = q20_package_install_kernel(pkg);
        if (ret)
            goto install_failed;
    }
    
    // Install device tree if needed
    if (q20_package_has_device_tree(pkg)) {
        ret = q20_package_install_device_tree(pkg);
        if (ret)
            goto install_failed;
    }
    
    // Add to package database
    ret = q20_package_db_add_package(pm->db, pkg);
    if (ret)
        goto install_failed;
    
    // Run post-install script
    ret = q20_package_run_script(pkg, "post-install.sh");
    if (ret)
        goto install_failed;
    
    pkg->installed = true;
    pkg->install_time = current_kernel_time().tv_sec;
    
    dev_info(pm->dev, "Package %s installed successfully\n", pkg->name);
    return 0;
    
install_failed:
    // Cleanup on failure
    q20_package_cleanup_failed_install(pkg);
    q20_package_free(pkg);
    return ret;
}

6.2 Update System

6.2.1 OSTree Integration

OSTree System Design:

// OSTree system structure
struct q20_ostree_system {
    struct device *dev;
    
    // OSTree repository
    struct ostree_repo *repo;
    char *repo_path;
    
    // Boot management
    struct ostree_boot_manager *boot_mgr;
    char *boot_path;
    
    // Deployment management
    struct list_head deployments;
    struct q20_ostree_deployment *current_deployment;
    struct q20_ostree_deployment *pending_deployment;
    
    // Update operations
    int (*pull_updates)(struct q20_ostree_system *ostree, const char *remote_url);
    int (*deploy_update)(struct q20_ostree_system *ostree, const char *commit_hash);
    int (*rollback)(struct q20_ostree_system *ostree);
    int (*cleanup)(struct q20_ostree_system *ostree);
};

// OSTree deployment
struct q20_ostree_deployment {
    struct list_head list;
    char *commit_hash;
    char *version;
    char *description;
    
    // Deployment state
    enum deployment_state state;
    bool booted;
    bool pending;
    
    // File system
    char *root_path;
    char *boot_path;
    
    // Metadata
    time_t deploy_time;
    time_t boot_time;
    int boot_count;
};

// OSTree operations
static int q20_ostree_pull_updates(struct q20_ostree_system *ostree, const char *remote_url)
{
    OstreeRepo *repo = ostree->repo;
    OstreeAsyncProgress *progress;
    GCancellable *cancellable;
    char *refspec;
    int ret;
    
    // Create progress tracker
    progress = ostree_async_progress_new();
    cancellable = g_cancellable_new();
    
    // Construct refspec
    refspec = g_strdup_printf("q20:q20/%s", ostree->current_deployment->version);
    
    // Pull updates from remote
    ret = ostree_repo_pull_with_options(repo, remote_url, refspec, NULL, progress, cancellable, NULL);
    if (ret) {
        dev_err(ostree->dev, "Failed to pull updates: %s\n", g_strerror(ret));
        goto pull_failed;
    }
    
    // Check for new commits
    ret = q20_ostree_check_new_commits(ostree);
    if (ret)
        goto pull_failed;
    
    dev_info(ostree->dev, "Updates pulled successfully\n");
    
pull_failed:
    g_free(refspec);
    g_object_unref(progress);
    g_object_unref(cancellable);
    return ret;
}

static int q20_ostree_deploy_update(struct q20_ostree_system *ostree, const char *commit_hash)
{
    OstreeRepo *repo = ostree->repo;
    OstreeDeployment *deployment;
    char *deployment_path;
    int ret;
    
    // Create new deployment
    ret = ostree_repo_prepare_transaction(repo, NULL, NULL);
    if (ret)
        return ret;
    
    // Deploy new commit
    ret = ostree_repo_write_delta_super(repo, commit_hash, NULL, NULL, NULL);
    if (ret)
        goto deploy_failed;
    
    // Commit transaction
    ret = ostree_repo_commit_transaction(repo, NULL, NULL);
    if (ret)
        goto deploy_failed;
    
    // Create deployment
    deployment = q20_ostree_create_deployment(ostree, commit_hash);
    if (!deployment) {
        ret = -ENOMEM;
        goto deploy_failed;
    }
    
    // Set as pending
    deployment->state = DEPLOYMENT_STATE_PENDING;
    deployment->pending = true;
    ostree->pending_deployment = deployment;
    
    // Update bootloader
    ret = q20_ostree_update_bootloader(ostree, deployment);
    if (ret)
        goto deploy_failed;
    
    dev_info(ostree->dev, "Update deployed successfully\n");
    return 0;
    
deploy_failed:
    ostree_repo_abort_transaction(repo, NULL);
    return ret;
}

6.2.2 Delta Updates

Delta Update System:

// Delta update structure
struct q20_delta_update {
    struct device *dev;
    
    // Delta information
    char *from_version;
    char *to_version;
    char *delta_path;
    
    // Delta operations
    struct list_head operations;
    size_t total_size;
    size_t compressed_size;
    
    // Progress tracking
    struct q20_delta_progress *progress;
    struct work_struct apply_work;
};

// Delta operation types
enum delta_operation_type {
    DELTA_OP_COPY,      // Copy file from base
    DELTA_OP_ADD,       // Add new file
    DELTA_OP_DELETE,    // Delete file
    DELTA_OP_PATCH,     // Apply binary patch
    DELTA_OP_SYMLINK,   // Create symlink
    DELTA_OP_CHMOD,     // Change permissions
};

// Delta operation
struct q20_delta_operation {
    struct list_head list;
    enum delta_operation_type type;
    
    // File information
    char *source_path;
    char *target_path;
    mode_t permissions;
    
    // Patch data
    void *patch_data;
    size_t patch_size;
    
    // Progress
    size_t bytes_processed;
    bool completed;
};

// Delta update application
static int q20_delta_apply_update(struct q20_delta_update *delta)
{
    struct q20_delta_operation *op;
    int ret;
    
    // Initialize progress tracking
    delta->progress = q20_delta_progress_create(delta);
    if (!delta->progress)
        return -ENOMEM;
    
    // Process each operation
    list_for_each_entry(op, &delta->operations, list) {
        ret = q20_delta_apply_operation(delta, op);
        if (ret) {
            dev_err(delta->dev, "Failed to apply operation: %d\n", ret);
            goto apply_failed;
        }
        
        // Update progress
        q20_delta_progress_update(delta->progress, op);
    }
    
    // Verify update
    ret = q20_delta_verify_update(delta);
    if (ret)
        goto apply_failed;
    
    dev_info(delta->dev, "Delta update applied successfully\n");
    return 0;
    
apply_failed:
    // Rollback on failure
    q20_delta_rollback(delta);
    return ret;
}

static int q20_delta_apply_operation(struct q20_delta_update *delta,
                                    struct q20_delta_operation *op)
{
    int ret;
    
    switch (op->type) {
    case DELTA_OP_COPY:
        ret = q20_delta_copy_file(op->source_path, op->target_path);
        break;
        
    case DELTA_OP_ADD:
        ret = q20_delta_add_file(op->target_path, op->patch_data, op->patch_size);
        break;
        
    case DELTA_OP_DELETE:
        ret = q20_delta_delete_file(op->target_path);
        break;
        
    case DELTA_OP_PATCH:
        ret = q20_delta_patch_file(op->source_path, op->target_path,
                                 op->patch_data, op->patch_size);
        break;
        
    case DELTA_OP_SYMLINK:
        ret = q20_delta_create_symlink(op->source_path, op->target_path);
        break;
        
    case DELTA_OP_CHMOD:
        ret = q20_delta_change_permissions(op->target_path, op->permissions);
        break;
        
    default:
        ret = -EINVAL;
        break;
    }
    
    if (ret == 0) {
        op->completed = true;
    }
    
    return ret;
}

6.3 Application Sandboxing

6.3.1 Flatpak Integration

Flatpak System Design:

// Flatpak system structure
struct q20_flatpak_system {
    struct device *dev;
    
    // Flatpak installation
    struct flatpak_installation *installation;
    char *installation_path;
    
    // Application management
    struct list_head applications;
    struct q20_flatpak_app *current_app;
    
    // Runtime management
    struct list_head runtimes;
    struct q20_flatpak_runtime *default_runtime;
    
    // Operations
    int (*install_app)(struct q20_flatpak_system *fp, const char *app_id);
    int (*remove_app)(struct q20_flatpak_system *fp, const char *app_id);
    int (*update_app)(struct q20_flatpak_system *fp, const char *app_id);
    int (*launch_app)(struct q20_flatpak_system *fp, const char *app_id);
};

// Flatpak application
struct q20_flatpak_app {
    struct list_head list;
    char *app_id;
    char *name;
    char *description;
    char *version;
    
    // Application metadata
    char *icon_path;
    char *desktop_file;
    char *executable;
    
    // Sandbox configuration
    struct q20_flatpak_sandbox *sandbox;
    struct q20_flatpak_permissions *permissions;
    
    // State
    bool installed;
    bool running;
    pid_t process_id;
};

// Flatpak sandbox
struct q20_flatpak_sandbox {
    struct q20_flatpak_app *app;
    
    // Namespace isolation
    bool network_namespace;
    bool pid_namespace;
    bool mount_namespace;
    bool uts_namespace;
    bool ipc_namespace;
    bool user_namespace;
    
    // Resource limits
    struct rlimit cpu_limit;
    struct rlimit memory_limit;
    struct rlimit disk_limit;
    
    // Mount points
    struct list_head mounts;
    char *root_path;
    char *data_path;
    char *cache_path;
};

// Flatpak operations
static int q20_flatpak_install_app(struct q20_flatpak_system *fp, const char *app_id)
{
    FlatpakInstallation *installation = fp->installation;
    FlatpakRemote *remote;
    GCancellable *cancellable;
    int ret;
    
    // Get default remote
    remote = flatpak_installation_get_default_remote(installation, cancellable, NULL);
    if (!remote) {
        ret = -ENOENT;
        goto install_failed;
    }
    
    // Install application
    ret = flatpak_installation_install(installation, remote->name, app_id, NULL,
                                     cancellable, NULL);
    if (ret) {
        dev_err(fp->dev, "Failed to install app %s: %s\n", app_id, g_strerror(ret));
        goto install_failed;
    }
    
    // Create application structure
    ret = q20_flatpak_create_app(fp, app_id);
    if (ret)
        goto install_failed;
    
    dev_info(fp->dev, "App %s installed successfully\n", app_id);
    return 0;
    
install_failed:
    return ret;
}

static int q20_flatpak_launch_app(struct q20_flatpak_system *fp, const char *app_id)
{
    struct q20_flatpak_app *app;
    struct q20_flatpak_sandbox *sandbox;
    pid_t pid;
    int ret;
    
    // Find application
    app = q20_flatpak_find_app(fp, app_id);
    if (!app) {
        ret = -ENOENT;
        goto launch_failed;
    }
    
    // Create sandbox
    sandbox = q20_flatpak_create_sandbox(app);
    if (!sandbox) {
        ret = -ENOMEM;
        goto launch_failed;
    }
    
    // Setup sandbox
    ret = q20_flatpak_setup_sandbox(sandbox);
    if (ret)
        goto launch_failed;
    
    // Launch application
    pid = q20_flatpak_fork_and_exec(app, sandbox);
    if (pid < 0) {
        ret = pid;
        goto launch_failed;
    }
    
    app->running = true;
    app->process_id = pid;
    
    dev_info(fp->dev, "App %s launched with PID %d\n", app_id, pid);
    return 0;
    
launch_failed:
    return ret;
}

6.3.2 Container Security

Security Implementation:

// Security manager
struct q20_security_manager {
    struct device *dev;
    
    // Security policies
    struct q20_security_policy *default_policy;
    struct list_head app_policies;
    
    // Capability management
    struct q20_capability_set *allowed_capabilities;
    struct q20_capability_set *denied_capabilities;
    
    // SELinux integration
    struct q20_selinux_context *selinux_ctx;
    
    // Operations
    int (*apply_policy)(struct q20_security_manager *sm, struct q20_flatpak_app *app);
    int (*check_permission)(struct q20_security_manager *sm, const char *permission);
    int (*audit_event)(struct q20_security_manager *sm, const char *event);
};

// Security policy
struct q20_security_policy {
    struct list_head list;
    char *app_id;
    
    // Permissions
    struct q20_permission_set *permissions;
    struct q20_permission_set *denied_permissions;
    
    // Network access
    bool allow_network;
    char **allowed_hosts;
    int num_allowed_hosts;
    
    // File system access
    struct q20_fs_permission *fs_permissions;
    int num_fs_permissions;
    
    // Device access
    struct q20_device_permission *device_permissions;
    int num_device_permissions;
};

// Security operations
static int q20_security_apply_policy(struct q20_security_manager *sm,
                                    struct q20_flatpak_app *app)
{
    struct q20_security_policy *policy;
    int ret;
    
    // Find app-specific policy
    policy = q20_security_find_policy(sm, app->app_id);
    if (!policy) {
        policy = sm->default_policy;
    }
    
    // Apply capability restrictions
    ret = q20_security_apply_capabilities(sm, app, policy);
    if (ret)
        return ret;
    
    // Apply SELinux context
    ret = q20_security_apply_selinux(sm, app, policy);
    if (ret)
        return ret;
    
    // Apply network restrictions
    ret = q20_security_apply_network(sm, app, policy);
    if (ret)
        return ret;
    
    // Apply file system restrictions
    ret = q20_security_apply_filesystem(sm, app, policy);
    if (ret)
        return ret;
    
    // Apply device restrictions
    ret = q20_security_apply_devices(sm, app, policy);
    if (ret)
        return ret;
    
    return 0;
}

static int q20_security_check_permission(struct q20_security_manager *sm,
                                        const char *permission)
{
    struct q20_security_policy *policy;
    struct q20_flatpak_app *app;
    
    // Get current app context
    app = q20_flatpak_get_current_app();
    if (!app)
        return -EACCES;
    
    // Find app policy
    policy = q20_security_find_policy(sm, app->app_id);
    if (!policy) {
        policy = sm->default_policy;
    }
    
    // Check if permission is denied
    if (q20_permission_set_contains(policy->denied_permissions, permission)) {
        q20_security_audit_event(sm, "permission_denied");
        return -EACCES;
    }
    
    // Check if permission is allowed
    if (q20_permission_set_contains(policy->permissions, permission)) {
        return 0;
    }
    
    // Check default policy
    if (q20_permission_set_contains(sm->default_policy->permissions, permission)) {
        return 0;
    }
    
    q20_security_audit_event(sm, "permission_denied");
    return -EACCES;
}

6.4 Secure Boot

6.4.1 Boot Verification

Secure Boot Implementation:

// Secure boot manager
struct q20_secure_boot {
    struct device *dev;
    
    // Key management
    struct q20_key_store *key_store;
    struct q20_public_key *platform_key;
    struct q20_public_key *db_key;
    struct q20_public_key *dbx_key;
    
    // Verification state
    bool secure_boot_enabled;
    bool verification_enabled;
    enum boot_verification_level verification_level;
    
    // Operations
    int (*verify_kernel)(struct q20_secure_boot *sb, const char *kernel_path);
    int (*verify_initramfs)(struct q20_secure_boot *sb, const char *initramfs_path);
    int (*verify_module)(struct q20_secure_boot *sb, const char *module_path);
    int (*enroll_key)(struct q20_secure_boot *sb, struct q20_public_key *key);
    int (*revoke_key)(struct q20_secure_boot *sb, struct q20_public_key *key);
};

// Key store
struct q20_key_store {
    struct device *dev;
    
    // Key storage
    struct list_head keys;
    char *key_store_path;
    
    // Key operations
    int (*add_key)(struct q20_key_store *ks, struct q20_public_key *key);
    int (*remove_key)(struct q20_key_store *ks, const char *key_id);
    int (*find_key)(struct q20_key_store *ks, const char *key_id, struct q20_public_key **key);
    int (*list_keys)(struct q20_key_store *ks, struct list_head *keys);
};

// Public key
struct q20_public_key {
    struct list_head list;
    char *key_id;
    char *key_name;
    enum key_type type;
    
    // Key data
    void *key_data;
    size_t key_size;
    enum key_algorithm algorithm;
    
    // Metadata
    time_t creation_time;
    time_t expiration_time;
    bool revoked;
};

// Secure boot operations
static int q20_secure_boot_verify_kernel(struct q20_secure_boot *sb, const char *kernel_path)
{
    struct q20_signature *signature;
    struct q20_public_key *key;
    void *kernel_data;
    size_t kernel_size;
    int ret;
    
    // Load kernel
    ret = q20_file_load(kernel_path, &kernel_data, &kernel_size);
    if (ret)
        return ret;
    
    // Extract signature
    ret = q20_signature_extract(kernel_data, kernel_size, &signature);
    if (ret)
        goto verify_failed;
    
    // Find signing key
    ret = q20_key_store_find_key(sb->key_store, signature->key_id, &key);
    if (ret)
        goto verify_failed;
    
    // Verify signature
    ret = q20_signature_verify(kernel_data, kernel_size, signature, key);
    if (ret)
        goto verify_failed;
    
    // Check key revocation
    if (key->revoked) {
        ret = -EKEYREVOKED;
        goto verify_failed;
    }
    
    // Check key expiration
    if (key->expiration_time && key->expiration_time < current_kernel_time().tv_sec) {
        ret = -EKEYEXPIRED;
        goto verify_failed;
    }
    
    dev_info(sb->dev, "Kernel verification successful\n");
    ret = 0;
    
verify_failed:
    kfree(kernel_data);
    q20_signature_free(signature);
    return ret;
}

static int q20_secure_boot_enroll_key(struct q20_secure_boot *sb, struct q20_public_key *key)
{
    int ret;
    
    // Validate key
    ret = q20_public_key_validate(key);
    if (ret)
        return ret;
    
    // Add to key store
    ret = q20_key_store_add_key(sb->key_store, key);
    if (ret)
        return ret;
    
    // Update secure boot database
    ret = q20_secure_boot_update_db(sb, key);
    if (ret)
        goto enroll_failed;
    
    dev_info(sb->dev, "Key %s enrolled successfully\n", key->key_name);
    return 0;
    
enroll_failed:
    q20_key_store_remove_key(sb->key_store, key->key_id);
    return ret;
}

6.4.2 Bootloader Integration

Bootloader Security:

// Bootloader security
struct q20_bootloader_security {
    struct device *dev;
    
    // Bootloader state
    bool secure_boot_enabled;
    bool fastboot_unlocked;
    bool oem_unlocked;
    
    // Verification
    struct q20_verification_chain *verification_chain;
    struct q20_boot_policy *boot_policy;
    
    // Operations
    int (*verify_boot_image)(struct q20_bootloader_security *bs, const char *image_path);
    int (*lock_bootloader)(struct q20_bootloader_security *bs);
    int (*unlock_bootloader)(struct q20_bootloader_security *bs);
    int (*set_boot_policy)(struct q20_bootloader_security *bs, struct q20_boot_policy *policy);
};

// Boot policy
struct q20_boot_policy {
    char *policy_name;
    
    // Verification settings
    bool verify_kernel;
    bool verify_initramfs;
    bool verify_device_tree;
    bool verify_modules;
    
    // Boot options
    bool allow_unsigned_kernels;
    bool allow_custom_kernels;
    bool require_secure_boot;
    
    // Recovery options
    bool allow_recovery_boot;
    bool allow_fastboot;
    bool allow_adb;
};

// Bootloader operations
static int q20_bootloader_verify_boot_image(struct q20_bootloader_security *bs,
                                           const char *image_path)
{
    struct q20_boot_image *boot_image;
    struct q20_signature *signature;
    int ret;
    
    // Load boot image
    ret = q20_boot_image_load(image_path, &boot_image);
    if (ret)
        return ret;
    
    // Verify kernel if required
    if (bs->boot_policy->verify_kernel) {
        ret = q20_secure_boot_verify_kernel(bs->secure_boot, boot_image->kernel_data);
        if (ret)
            goto verify_failed;
    }
    
    // Verify initramfs if required
    if (bs->boot_policy->verify_initramfs) {
        ret = q20_secure_boot_verify_initramfs(bs->secure_boot, boot_image->initramfs_data);
        if (ret)
            goto verify_failed;
    }
    
    // Verify device tree if required
    if (bs->boot_policy->verify_device_tree) {
        ret = q20_secure_boot_verify_device_tree(bs->secure_boot, boot_image->dtb_data);
        if (ret)
            goto verify_failed;
    }
    
    dev_info(bs->dev, "Boot image verification successful\n");
    ret = 0;
    
verify_failed:
    q20_boot_image_free(boot_image);
    return ret;
}

📊 Deliverables

6.5 Complete Packaging System

Requirements:

• Functional package manager
• OSTree update system
• Flatpak application sandboxing
• Secure boot implementation
• Update delivery system

6.6 Update Infrastructure

Components:

• Update server
• Delta update system
• Rollback mechanism
• Update verification
• Distribution system

6.7 Security Framework

Features:

• Application sandboxing
• Permission management
• Secure boot chain
• Key management
• Audit logging

⏱️ Timeline

Week 1-2: System packaging architecture Week 3-4: OSTree update system Week 5-6: Delta updates Week 7-8: Flatpak integration Week 9-10: Security framework Week 11-12: Testing and deployment

Total Duration: 12 weeks (3 months)

🎯 Success Criteria

Phase 6 is successful when:

1. Complete packaging system is functional
2. Update system is reliable and secure
3. Application sandboxing is working
4. Secure boot is implemented
5. Update delivery is automated

🚨 Risk Mitigation

High-Risk Scenarios:

• Update system failures → Implement robust rollback mechanisms
• Security vulnerabilities → Comprehensive security auditing
• Package conflicts → Dependency resolution and conflict detection
• Boot failures → Multiple boot paths and recovery options
• Storage corruption → Data integrity checks and backup systems