sysupdater: begin implementing api

libraries/libstratosphere/include/stratosphere/ams/impl/ams_system_thread_definitions.hpp

@@ -61,6 +61,7 @@ namespace ams::impl {
     AMS_DEFINE_SYSTEM_THREAD(-1, mitm_sf,         QueryServerProcessThread);
     AMS_DEFINE_SYSTEM_THREAD(16, mitm_fs,         RomFileSystemInitializeThread);
     AMS_DEFINE_SYSTEM_THREAD(21, mitm,            DebugThrowThread);
+    AMS_DEFINE_SYSTEM_THREAD(21, mitm_sysupdater, IpcServer);
 
     /* boot2. */
     AMS_DEFINE_SYSTEM_THREAD(20, boot2, Main);

libraries/libstratosphere/include/stratosphere/ncm/ncm_content_meta_utils.hpp

@@ -23,8 +23,11 @@
 
 namespace ams::ncm {
 
-    Result ReadContentMetaPath(AutoBuffer *out, const char *path);
+    using MountContentMetaFunction = Result (*)(const char *mount_name, const char *path);
 
+    Result ReadContentMetaPath(AutoBuffer *out, const char *path);
     Result ReadVariationContentMetaInfoList(s32 *out_count, std::unique_ptr<ContentMetaInfo[]> *out_meta_infos, const Path &path, FirmwareVariationId firmware_variation_id);
 
+    void SetMountContentMetaFunction(MountContentMetaFunction func);
+
 }

libraries/libstratosphere/source/fssystem/fssystem_file_system_proxy_api.cpp

@@ -24,12 +24,12 @@ namespace ams::fssystem {
 
         /* Official FS has a 4.5 MB exp heap, a 6 MB buffer pool, an 8 MB device buffer manager heap, and a 14 MB buffer manager heap. */
         /* We don't need so much memory for ams.mitm (as we're servicing a much more limited context). */
-        /* We'll give ourselves a 2.5 MB exp heap, a 2 MB buffer pool, a 2 MB device buffer manager heap, and a 2 MB buffer manager heap. */
+        /* We'll give ourselves a 1.5 MB exp heap, a 1 MB buffer pool, a 1 MB device buffer manager heap, and a 1 MB buffer manager heap. */
-        /* These numbers match signed-system-partition safe FS. */
+        /* These numbers are 1 MB less than signed-system-partition safe FS in all pools. */
-        constexpr size_t ExpHeapSize           = 2_MB + 512_KB;
+        constexpr size_t ExpHeapSize           = 1_MB + 512_KB;
-        constexpr size_t BufferPoolSize        = 2_MB;
+        constexpr size_t BufferPoolSize        = 1_MB;
-        constexpr size_t DeviceBufferSize      = 2_MB;
+        constexpr size_t DeviceBufferSize      = 1_MB;
-        constexpr size_t BufferManagerHeapSize = 2_MB;
+        constexpr size_t BufferManagerHeapSize = 1_MB;
 
         constexpr size_t MaxCacheCount = 1024;
         constexpr size_t BlockSize     = 16_KB;

libraries/libstratosphere/source/ncm/ncm_content_meta_utils.cpp

@@ -26,12 +26,18 @@ namespace ams::ncm {
             return impl::PathView(name).HasSuffix(".cnmt");
         }
 
+        Result MountContentMetaByRemoteFileSystemProxy(const char *mount_name, const char *path) {
+            return fs::MountContent(mount_name, path, fs::ContentType_Meta);
+        }
+
+        constinit MountContentMetaFunction g_mount_content_meta_func = MountContentMetaByRemoteFileSystemProxy;
+
     }
 
     Result ReadContentMetaPath(AutoBuffer *out, const char *path) {
         /* Mount the content. */
         auto mount_name = impl::CreateUniqueMountName();
-        R_TRY(fs::MountContent(mount_name.str, path, fs::ContentType_Meta));
+        R_TRY(g_mount_content_meta_func(mount_name.str, path));
         ON_SCOPE_EXIT { fs::Unmount(mount_name.str); };
 
         /* Open the root directory. */
@@ -156,4 +162,8 @@ namespace ams::ncm {
         return ResultSuccess();
     }
 
+    void SetMountContentMetaFunction(MountContentMetaFunction func) {
+        g_mount_content_meta_func = func;
+    }
+
 }

stratosphere/ams_mitm/source/amsmitm_initialization.cpp

@@ -157,6 +157,7 @@ namespace ams::mitm {
 
             /* Connect to set:sys. */
             sm::DoWithSession([]() {
+                R_ABORT_UNLESS(setInitialize());
                 R_ABORT_UNLESS(setsysInitialize());
             });
 

stratosphere/ams_mitm/source/amsmitm_main.cpp

@@ -17,6 +17,7 @@
 #include "amsmitm_initialization.hpp"
 #include "amsmitm_module_management.hpp"
 #include "bpc_mitm/bpc_ams_power_utils.hpp"
+#include "sysupdater/sysupdater_fs_utils.hpp"
 
 extern "C" {
     extern u32 __start__;
@@ -84,6 +85,12 @@ void __appInit(void) {
         spl::InitializeForFs();
     });
 
+    /* Initialize fssystem library. */
+    fssystem::InitializeForFileSystemProxy();
+
+    /* Configure ncm to use fssystem library to mount content. */
+    ncm::SetMountContentMetaFunction(mitm::sysupdater::MountContentMeta);
+
     ams::CheckApiVersion();
 }
 

stratosphere/ams_mitm/source/amsmitm_module.hpp

@@ -18,7 +18,6 @@
 
 namespace ams::mitm {
 
-    /* TODO: C++20 Concepts will make this a lot less stupid. */
     template<typename T>
     concept IsModule = requires(T, void *arg) {
         { T::ThreadPriority      } -> std::convertible_to<s32>;

stratosphere/ams_mitm/source/amsmitm_module_management.cpp

@@ -23,6 +23,7 @@
 #include "bpc_mitm/bpc_ams_module.hpp"
 #include "ns_mitm/nsmitm_module.hpp"
 #include "hid_mitm/hidmitm_module.hpp"
+#include "sysupdater/sysupdater_module.hpp"
 
 namespace ams::mitm {
 
@@ -35,6 +36,7 @@ namespace ams::mitm {
             ModuleId_BpcAms,
             ModuleId_NsMitm,
             ModuleId_HidMitm,
+            ModuleId_Sysupdater,
 
             ModuleId_Count,
         };
@@ -67,6 +69,7 @@ namespace ams::mitm {
             GetModuleDefinition<bpc_ams::MitmModule>(),
             GetModuleDefinition<ns::MitmModule>(),
             GetModuleDefinition<hid::MitmModule>(),
+            GetModuleDefinition<sysupdater::MitmModule>(),
         };
 
     }

stratosphere/ams_mitm/source/bpc_mitm/bpc_ams_service.hpp

@@ -13,7 +13,6 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
-
 #pragma once
 #include <stratosphere.hpp>
 

stratosphere/ams_mitm/source/sysupdater/sysupdater_fs_utils.cpp

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "sysupdater_fs_utils.hpp"
+
+namespace ams::mitm::sysupdater {
+
+    Result MountContentMeta(const char *mount_name, const char *path) {
+        /* TODO: Implement */
+        AMS_ABORT();
+    }
+
+}

stratosphere/ams_mitm/source/sysupdater/sysupdater_fs_utils.hpp

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::mitm::sysupdater {
+
+    Result MountContentMeta(const char *mount_name, const char *path);
+
+}

stratosphere/ams_mitm/source/sysupdater/sysupdater_module.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "../amsmitm_initialization.hpp"
+#include "sysupdater_module.hpp"
+#include "sysupdater_service.hpp"
+
+namespace ams::mitm::sysupdater {
+
+    namespace {
+
+        constexpr sm::ServiceName SystemUpdateServiceName = sm::ServiceName::Encode("ams:su");
+        constexpr size_t          SystemUpdateMaxSessions = 1;
+
+        constexpr size_t MaxServers = 1;
+        constexpr size_t MaxSessions = SystemUpdateMaxSessions;
+        using ServerOptions = sf::hipc::DefaultServerManagerOptions;
+        sf::hipc::ServerManager<MaxServers, ServerOptions, MaxSessions> g_server_manager;
+
+    }
+
+    void MitmModule::ThreadFunction(void *arg) {
+        /* Wait until initialization is complete. */
+        mitm::WaitInitialized();
+
+        /* Connect to nim. */
+        sm::DoWithSession([]() { nim::InitializeForNetworkInstallManager(); });
+        ON_SCOPE_EXIT { nim::FinalizeForNetworkInstallManager(); };
+
+        /* Register ams:su. */
+        R_ABORT_UNLESS((g_server_manager.RegisterServer<sysupdater::SystemUpdateService>(SystemUpdateServiceName, SystemUpdateMaxSessions)));
+
+        /* Loop forever, servicing our services. */
+        g_server_manager.LoopProcess();
+    }
+
+}

stratosphere/ams_mitm/source/sysupdater/sysupdater_module.hpp

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+#include "../amsmitm_module.hpp"
+
+namespace ams::mitm::sysupdater {
+
+    DEFINE_MITM_MODULE_CLASS(0x8000, AMS_GET_SYSTEM_THREAD_PRIORITY(mitm_sysupdater, IpcServer));
+
+}

stratosphere/ams_mitm/source/sysupdater/sysupdater_service.cpp

@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "sysupdater_service.hpp"
+
+namespace ams::mitm::sysupdater {
+
+    namespace {
+
+        /* ExFat NCAs prior to 2.0.0 do not actually include the exfat driver, and don't boot. */
+        constexpr inline u32 MinimumVersionForExFatDriver = 65536;
+
+        Result ActivateSystemUpdateContentMetaDatabase() {
+            /* TODO: Don't use gamecard db. */
+            return ncm::ActivateContentMetaDatabase(ncm::StorageId::GameCard);
+        }
+
+        void InactivateSystemUpdateContentMetaDatabase() {
+            /* TODO: Don't use gamecard db. */
+            ncm::InactivateContentMetaDatabase(ncm::StorageId::GameCard);
+        }
+
+        Result OpenSystemUpdateContentMetaDatabase(ncm::ContentMetaDatabase *out) {
+            /* TODO: Don't use gamecard db. */
+            return ncm::OpenContentMetaDatabase(out, ncm::StorageId::GameCard);
+        }
+
+        Result GetContentInfoOfContentMeta(ncm::ContentInfo *out, ncm::ContentMetaDatabase &db, const ncm::ContentMetaKey &key) {
+            s32 ofs = 0;
+            while (true) {
+                /* List content infos. */
+                s32 count;
+                ncm::ContentInfo info;
+                R_TRY(db.ListContentInfo(std::addressof(count), std::addressof(info), 1, key, ofs++));
+
+                /* No content infos left to list. */
+                if (count == 0) {
+                    break;
+                }
+
+                /* Check if the info is for meta content. */
+                if (info.GetType() == ncm::ContentType::Meta) {
+                    *out = info;
+                    return ResultSuccess();
+                }
+            }
+
+            /* Not found. */
+            return ncm::ResultContentInfoNotFound();
+        }
+
+        Result ReadContentMetaPath(ncm::AutoBuffer *out, const char *package_root, const ncm::ContentInfo &content_info) {
+            /* Get the content id string for the info. */
+            auto content_id_str = ncm::GetContentIdString(content_info.GetId());
+
+            /* Create a new path. */
+            ncm::Path content_path;
+            std::snprintf(content_path.str, sizeof(content_path.str), "%s/%s.cnmt.nca", package_root, content_id_str.data);
+
+            /* Read the content meta path. */
+            return ncm::ReadContentMetaPath(out, content_path.str);
+        }
+
+        bool IsExFatDriverSupported(const ncm::ContentMetaInfo &info) {
+            return info.version >= MinimumVersionForExFatDriver && ((info.attributes & ncm::ContentMetaAttribute_IncludesExFatDriver) != 0);
+        }
+
+    }
+
+    Result SystemUpdateService::GetUpdateInformation(sf::Out<UpdateInformation> out, const ncm::Path &package_root) {
+        /* Create a new update information. */
+        UpdateInformation update_info = {};
+
+        /* Parse the update. */
+        {
+            /* Activate the package database. */
+            R_TRY(ActivateSystemUpdateContentMetaDatabase());
+            ON_SCOPE_EXIT { InactivateSystemUpdateContentMetaDatabase(); };
+
+            /* Open the package database. */
+            ncm::ContentMetaDatabase package_db;
+            R_TRY(OpenSystemUpdateContentMetaDatabase(std::addressof(package_db)));
+
+            /* Cleanup and build the content meta database. */
+            ncm::ContentMetaDatabaseBuilder builder(std::addressof(package_db));
+            R_TRY(builder.Cleanup());
+            R_TRY(builder.BuildFromPackage(package_root.str));
+
+            /* Get the key for the SystemUpdate. */
+            ncm::ContentMetaKey key;
+            auto list_count = package_db.ListContentMeta(std::addressof(key), 1, ncm::ContentMetaType::SystemUpdate);
+            R_UNLESS(list_count.written > 0, ncm::ResultSystemUpdateNotFoundInPackage());
+
+            /* Get the content info for the key. */
+            ncm::ContentInfo content_info;
+            R_TRY(GetContentInfoOfContentMeta(std::addressof(content_info), package_db, key));
+
+            /* Read the content meta. */
+            ncm::AutoBuffer content_meta_buffer;
+            R_TRY(ReadContentMetaPath(std::addressof(content_meta_buffer), package_root.str, content_info));
+
+            /* Create a reader. */
+            const auto reader = ncm::PackagedContentMetaReader(content_meta_buffer.Get(), content_meta_buffer.GetSize());
+
+            /* Iterate over infos to find the system update info. */
+            for (size_t i = 0; i < reader.GetContentMetaCount(); ++i) {
+                const auto &meta_info = *reader.GetContentMetaInfo(i);
+
+                switch (meta_info.type) {
+                    case ncm::ContentMetaType::SystemUpdate:
+                        /* Set the version. */
+                        update_info.version = meta_info.version;
+                        break;
+                    case ncm::ContentMetaType::BootImagePackage:
+                        /* Detect exFAT support. */
+                        update_info.exfat_supported |= IsExFatDriverSupported(meta_info);
+                        break;
+                    default:
+                        break;
+                }
+            }
+
+            /* Default to no firmware variations. */
+            update_info.firmware_variation_count = 0;
+
+            /* Parse firmware variations if relevant. */
+            if (reader.GetExtendedDataSize() != 0) {
+                /* Get the actual firmware variation count. */
+                ncm::SystemUpdateMetaExtendedDataReader extended_data_reader(reader.GetExtendedData(), reader.GetExtendedDataSize());
+                update_info.firmware_variation_count = extended_data_reader.GetFirmwareVariationCount();
+
+                /* NOTE: Update this if Nintendo ever actually releases an update with this many variations? */
+                R_UNLESS(update_info.firmware_variation_count <= FirmwareVariationCountMax, ncm::ResultInvalidFirmwareVariation());
+
+                for (size_t i = 0; i < update_info.firmware_variation_count; ++i) {
+                    update_info.firmware_variation_ids[i] = *extended_data_reader.GetFirmwareVariationId(i);
+                }
+            }
+        }
+
+        /* Set the parsed update info. */
+        out.SetValue(update_info);
+        return ResultSuccess();
+    }
+
+}

stratosphere/ams_mitm/source/sysupdater/sysupdater_service.hpp

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+#include <stratosphere.hpp>
+
+namespace ams::mitm::sysupdater {
+
+    constexpr inline size_t FirmwareVariationCountMax = 16;
+
+    struct UpdateInformation {
+        u32 version;
+        bool exfat_supported;
+        u32 firmware_variation_count;
+        ncm::FirmwareVariationId firmware_variation_ids[FirmwareVariationCountMax];
+    };
+
+    class SystemUpdateService final : public sf::IServiceObject {
+        private:
+            enum class CommandId {
+                GetUpdateInformation = 0,
+            };
+        private:
+            Result GetUpdateInformation(sf::Out<UpdateInformation> out, const ncm::Path &path);
+        public:
+            DEFINE_SERVICE_DISPATCH_TABLE {
+                MAKE_SERVICE_COMMAND_META(GetUpdateInformation),
+            };
+    };
+
+}