14 files changed, 93 insertions, 66 deletions

diff --git a/src/common/common_paths.h b/src/common/common_paths.h
index e692e5492..0ecf2d9de 100644
--- a/src/common/common_paths.h
+++ b/src/common/common_paths.h
@@ -35,26 +35,23 @@
 #define JAP_DIR "JAP"
 
 // Subdirs in the User dir returned by GetUserPath(D_USER_IDX)
-#define CONFIG_DIR        "config"
-#define GAMECONFIG_DIR    "game_config"
-#define MAPS_DIR          "maps"
-#define CACHE_DIR         "cache"
-#define SDMC_DIR          "sdmc"
-#define EXTSAVEDATA_DIR   "extsavedata"
-#define SAVEDATA_DIR      "savedata"
-#define SAVEDATACHECK_DIR "savedatacheck"
-#define SYSDATA_DIR       "sysdata"
-#define SYSSAVEDATA_DIR   "syssavedata"
-#define SHADERCACHE_DIR   "shader_cache"
-#define STATESAVES_DIR    "state_saves"
-#define SCREENSHOTS_DIR   "screenShots"
-#define DUMP_DIR          "dump"
-#define DUMP_TEXTURES_DIR "textures"
-#define DUMP_FRAMES_DIR   "frames"
-#define DUMP_AUDIO_DIR    "audio"
-#define LOGS_DIR          "logs"
-#define SHADERS_DIR       "shaders"
-#define SYSCONF_DIR       "sysconf"
+#define CONFIG_DIR               "config"
+#define GAMECONFIG_DIR           "game_config"
+#define MAPS_DIR                 "maps"
+#define CACHE_DIR                "cache"
+#define SDMC_DIR                 "sdmc"
+#define NAND_DIR                 "nand"
+#define SYSDATA_DIR              "sysdata"
+#define SHADERCACHE_DIR          "shader_cache"
+#define STATESAVES_DIR           "state_saves"
+#define SCREENSHOTS_DIR          "screenShots"
+#define DUMP_DIR                 "dump"
+#define DUMP_TEXTURES_DIR        "textures"
+#define DUMP_FRAMES_DIR          "frames"
+#define DUMP_AUDIO_DIR           "audio"
+#define LOGS_DIR                 "logs"
+#define SHADERS_DIR              "shaders"
+#define SYSCONF_DIR              "sysconf"
 
 // Filenames
 // Files in the directory returned by GetUserPath(D_CONFIG_IDX)
diff --git a/src/common/file_util.cpp b/src/common/file_util.cpp
index 0a6cd80c8..706e7c842 100644
--- a/src/common/file_util.cpp
+++ b/src/common/file_util.cpp
@@ -676,11 +676,8 @@ const std::string& GetUserPath(const unsigned int DirIDX, const std::string &new
         paths[D_MAPS_IDX]           = paths[D_USER_IDX] + MAPS_DIR DIR_SEP;
         paths[D_CACHE_IDX]          = paths[D_USER_IDX] + CACHE_DIR DIR_SEP;
         paths[D_SDMC_IDX]           = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
-        paths[D_EXTSAVEDATA]        = paths[D_USER_IDX] + EXTSAVEDATA_DIR DIR_SEP;
-        paths[D_SAVEDATA_IDX]       = paths[D_USER_IDX] + SAVEDATA_DIR DIR_SEP;
-        paths[D_SAVEDATACHECK_IDX]  = paths[D_USER_IDX] + SAVEDATACHECK_DIR DIR_SEP;
+        paths[D_NAND_IDX]           = paths[D_USER_IDX] + NAND_DIR DIR_SEP;
         paths[D_SYSDATA_IDX]        = paths[D_USER_IDX] + SYSDATA_DIR DIR_SEP;
-        paths[D_SYSSAVEDATA_IDX]    = paths[D_USER_IDX] + SYSSAVEDATA_DIR DIR_SEP;
         paths[D_SHADERCACHE_IDX]    = paths[D_USER_IDX] + SHADERCACHE_DIR DIR_SEP;
         paths[D_SHADERS_IDX]        = paths[D_USER_IDX] + SHADERS_DIR DIR_SEP;
         paths[D_STATESAVES_IDX]     = paths[D_USER_IDX] + STATESAVES_DIR DIR_SEP;
@@ -722,10 +719,7 @@ const std::string& GetUserPath(const unsigned int DirIDX, const std::string &new
             paths[D_MAPS_IDX]           = paths[D_USER_IDX] + MAPS_DIR DIR_SEP;
             paths[D_CACHE_IDX]          = paths[D_USER_IDX] + CACHE_DIR DIR_SEP;
             paths[D_SDMC_IDX]           = paths[D_USER_IDX] + SDMC_DIR DIR_SEP;
-            paths[D_EXTSAVEDATA]        = paths[D_USER_IDX] + EXTSAVEDATA_DIR DIR_SEP;
-            paths[D_SAVEDATA_IDX]       = paths[D_USER_IDX] + SAVEDATA_DIR DIR_SEP;
-            paths[D_SAVEDATACHECK_IDX]  = paths[D_USER_IDX] + SAVEDATACHECK_DIR DIR_SEP;
-            paths[D_SYSSAVEDATA_IDX]    = paths[D_USER_IDX] + SYSSAVEDATA_DIR DIR_SEP;
+            paths[D_NAND_IDX]           = paths[D_USER_IDX] + NAND_DIR DIR_SEP;
             paths[D_SHADERCACHE_IDX]    = paths[D_USER_IDX] + SHADERCACHE_DIR DIR_SEP;
             paths[D_SHADERS_IDX]        = paths[D_USER_IDX] + SHADERS_DIR DIR_SEP;
             paths[D_STATESAVES_IDX]     = paths[D_USER_IDX] + STATESAVES_DIR DIR_SEP;
diff --git a/src/common/file_util.h b/src/common/file_util.h
index c83ecd87d..86aab2e3d 100644
--- a/src/common/file_util.h
+++ b/src/common/file_util.h
@@ -27,11 +27,8 @@ enum {
     D_STATESAVES_IDX,
     D_SCREENSHOTS_IDX,
     D_SDMC_IDX,
-    D_EXTSAVEDATA,
-    D_SAVEDATA_IDX,
-    D_SAVEDATACHECK_IDX,
+    D_NAND_IDX,
     D_SYSDATA_IDX,
-    D_SYSSAVEDATA_IDX,
     D_HIRESTEXTURES_IDX,
     D_DUMP_IDX,
     D_DUMPFRAMES_IDX,
diff --git a/src/core/file_sys/archive_extsavedata.cpp b/src/core/file_sys/archive_extsavedata.cpp
index 4759ef3ae..0805f42ae 100644
--- a/src/core/file_sys/archive_extsavedata.cpp
+++ b/src/core/file_sys/archive_extsavedata.cpp
@@ -9,6 +9,7 @@
 
 #include "core/file_sys/archive_extsavedata.h"
 #include "core/file_sys/disk_archive.h"
+#include "core/hle/service/fs/archive.h"
 #include "core/settings.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -19,15 +20,22 @@ namespace FileSys {
 static std::string GetExtSaveDataPath(const std::string& mount_point, const Path& path) {
     std::vector<u8> vec_data = path.AsBinary();
     const u32* data = reinterpret_cast<const u32*>(vec_data.data());
-    u32 media_type = data[0];
     u32 save_low = data[1];
     u32 save_high = data[2];
-    return Common::StringFromFormat("%s%s/%08X/%08X/", mount_point.c_str(), media_type == 0 ? "nand" : "sdmc", save_high, save_low);
+    return Common::StringFromFormat("%s%08X/%08X/", mount_point.c_str(), save_high, save_low);
 }
 
-Archive_ExtSaveData::Archive_ExtSaveData(const std::string& mount_point)
-        : DiskArchive(mount_point), concrete_mount_point(mount_point) {
-    LOG_INFO(Service_FS, "Directory %s set as base for ExtSaveData.", this->mount_point.c_str());
+static std::string GetExtDataContainerPath(const std::string& mount_point, bool shared) {
+    if (shared)
+        return Common::StringFromFormat("%sdata/%s/extdata/", mount_point.c_str(), SYSTEM_ID.c_str());
+    
+    return Common::StringFromFormat("%sNintendo 3DS/%s/%s/extdata/", mount_point.c_str(), 
+            SYSTEM_ID.c_str(), SDCARD_ID.c_str());
+}
+
+Archive_ExtSaveData::Archive_ExtSaveData(const std::string& mount_location, bool shared)
+        : DiskArchive(GetExtDataContainerPath(mount_location, shared)) {
+    LOG_INFO(Service_FS, "Directory %s set as base for ExtSaveData.", mount_point.c_str());
 }
 
 bool Archive_ExtSaveData::Initialize() {
diff --git a/src/core/file_sys/archive_extsavedata.h b/src/core/file_sys/archive_extsavedata.h
index a3a144799..fb7f209d2 100644
--- a/src/core/file_sys/archive_extsavedata.h
+++ b/src/core/file_sys/archive_extsavedata.h
@@ -17,7 +17,7 @@ namespace FileSys {
 /// File system interface to the ExtSaveData archive
 class Archive_ExtSaveData final : public DiskArchive {
 public:
-    Archive_ExtSaveData(const std::string& mount_point);
+    Archive_ExtSaveData(const std::string& mount_point, bool shared);
 
     /**
      * Initialize the archive.
diff --git a/src/core/file_sys/archive_savedata.cpp b/src/core/file_sys/archive_savedata.cpp
index 280d4ff5d..3baee5294 100644
--- a/src/core/file_sys/archive_savedata.cpp
+++ b/src/core/file_sys/archive_savedata.cpp
@@ -9,6 +9,7 @@
 
 #include "core/file_sys/archive_savedata.h"
 #include "core/file_sys/disk_archive.h"
+#include "core/hle/service/fs/archive.h"
 #include "core/settings.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -16,14 +17,25 @@
 
 namespace FileSys {
 
-Archive_SaveData::Archive_SaveData(const std::string& mount_point)
-        : DiskArchive(mount_point) {
+static std::string GetSaveDataContainerPath(const std::string& sdmc_directory) {
+    return Common::StringFromFormat("%sNintendo 3DS/%s/%s/title/", sdmc_directory.c_str(), 
+            SYSTEM_ID.c_str(), SDCARD_ID.c_str());
+}
+
+static std::string GetSaveDataPath(const std::string& mount_location, u64 program_id) {
+    u32 high = program_id >> 32;
+    u32 low = program_id & 0xFFFFFFFF;
+    return Common::StringFromFormat("%s%08x/%08x/data/00000001/", mount_location.c_str(), high, low);
+}
+
+Archive_SaveData::Archive_SaveData(const std::string& sdmc_directory)
+        : DiskArchive(GetSaveDataContainerPath(sdmc_directory)) {
     LOG_INFO(Service_FS, "Directory %s set as SaveData.", this->mount_point.c_str());
 }
 
 ResultCode Archive_SaveData::Open(const Path& path) {
     if (concrete_mount_point.empty())
-        concrete_mount_point = Common::StringFromFormat("%s%016X", mount_point.c_str(), Kernel::g_program_id) + DIR_SEP;
+        concrete_mount_point = GetSaveDataPath(mount_point, Kernel::g_program_id);
     if (!FileUtil::Exists(concrete_mount_point)) {
         // When a SaveData archive is created for the first time, it is not yet formatted
         // and the save file/directory structure expected by the game has not yet been initialized. 
diff --git a/src/core/file_sys/archive_savedatacheck.cpp b/src/core/file_sys/archive_savedatacheck.cpp
index 233158a0c..a7a507536 100644
--- a/src/core/file_sys/archive_savedatacheck.cpp
+++ b/src/core/file_sys/archive_savedatacheck.cpp
@@ -5,13 +5,24 @@
 #include "common/file_util.h"
 
 #include "core/file_sys/archive_savedatacheck.h"
+#include "core/hle/service/fs/archive.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
 namespace FileSys {
 
-Archive_SaveDataCheck::Archive_SaveDataCheck(const std::string& mount_loc) : mount_point(mount_loc) {
+static std::string GetSaveDataCheckContainerPath(const std::string& nand_directory) {
+    return Common::StringFromFormat("%s%s/title/", nand_directory.c_str(), SYSTEM_ID.c_str());
+}
+
+static std::string GetSaveDataCheckPath(const std::string& mount_point, u32 high, u32 low) {
+    return Common::StringFromFormat("%s%08x/%08x/content/00000000.app.romfs",
+            mount_point.c_str(), high, low);
+}
+
+Archive_SaveDataCheck::Archive_SaveDataCheck(const std::string& nand_directory) :
+        mount_point(GetSaveDataCheckContainerPath(nand_directory)) {
 }
 
 ResultCode Archive_SaveDataCheck::Open(const Path& path) {
@@ -23,7 +34,7 @@ ResultCode Archive_SaveDataCheck::Open(const Path& path) {
     // this archive again with a different path, will corrupt the previously open file.
     auto vec = path.AsBinary();
     const u32* data = reinterpret_cast<u32*>(vec.data());
-    std::string file_path = Common::StringFromFormat("%s%08x%08x.bin", mount_point.c_str(), data[1], data[0]);
+    std::string file_path = GetSaveDataCheckPath(mount_point, data[1], data[0]);
     FileUtil::IOFile file(file_path, "rb");
 
     std::fill(raw_data.begin(), raw_data.end(), 0);
diff --git a/src/core/file_sys/archive_sdmc.cpp b/src/core/file_sys/archive_sdmc.cpp
index 1c1c170b6..26b03e82f 100644
--- a/src/core/file_sys/archive_sdmc.cpp
+++ b/src/core/file_sys/archive_sdmc.cpp
@@ -16,8 +16,8 @@
 
 namespace FileSys {
 
-Archive_SDMC::Archive_SDMC(const std::string& mount_point) : DiskArchive(mount_point) {
-    LOG_INFO(Service_FS, "Directory %s set as SDMC.", mount_point.c_str());
+Archive_SDMC::Archive_SDMC(const std::string& sdmc_directory) : DiskArchive(sdmc_directory) {
+    LOG_INFO(Service_FS, "Directory %s set as SDMC.", sdmc_directory.c_str());
 }
 
 bool Archive_SDMC::Initialize() {
diff --git a/src/core/file_sys/archive_systemsavedata.cpp b/src/core/file_sys/archive_systemsavedata.cpp
index 0da32d510..c2a5d641a 100644
--- a/src/core/file_sys/archive_systemsavedata.cpp
+++ b/src/core/file_sys/archive_systemsavedata.cpp
@@ -9,6 +9,7 @@
 
 #include "core/file_sys/archive_systemsavedata.h"
 #include "core/file_sys/disk_archive.h"
+#include "core/hle/service/fs/archive.h"
 #include "core/settings.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -22,8 +23,12 @@ static std::string GetSystemSaveDataPath(const std::string& mount_point, u64 sav
     return Common::StringFromFormat("%s%08X/%08X/", mount_point.c_str(), save_low, save_high);
 }
 
+static std::string GetSystemSaveDataContainerPath(const std::string& mount_point) {
+    return Common::StringFromFormat("%sdata/%s/sysdata/", mount_point.c_str(), SYSTEM_ID.c_str());
+}
+
 Archive_SystemSaveData::Archive_SystemSaveData(const std::string& mount_point, u64 save_id)
-        : DiskArchive(GetSystemSaveDataPath(mount_point, save_id)) {
+        : DiskArchive(GetSystemSaveDataPath(GetSystemSaveDataContainerPath(mount_point), save_id)) {
     LOG_INFO(Service_FS, "Directory %s set as SystemSaveData.", this->mount_point.c_str());
 }
 
diff --git a/src/core/file_sys/archive_systemsavedata.h b/src/core/file_sys/archive_systemsavedata.h
index 55d85193c..c8f5845ca 100644
--- a/src/core/file_sys/archive_systemsavedata.h
+++ b/src/core/file_sys/archive_systemsavedata.h
@@ -15,8 +15,6 @@
 namespace FileSys {
 
 /// File system interface to the SystemSaveData archive
-/// TODO(Subv): This archive should point to a location in the NAND,
-/// specifically nand:/data/<ID0>/sysdata/<SaveID-Low>/<SaveID-High>
 class Archive_SystemSaveData final : public DiskArchive {
 public:
     Archive_SystemSaveData(const std::string& mount_point, u64 save_id);
diff --git a/src/core/hle/service/cfg/cfg.cpp b/src/core/hle/service/cfg/cfg.cpp
index 161aa8531..8812c49ef 100644
--- a/src/core/hle/service/cfg/cfg.cpp
+++ b/src/core/hle/service/cfg/cfg.cpp
@@ -161,9 +161,9 @@ ResultCode FormatConfig() {
 void CFGInit() {
     // TODO(Subv): In the future we should use the FS service to query this archive, 
     // currently it is not possible because you can only have one open archive of the same type at any time
-    std::string syssavedata_directory = FileUtil::GetUserPath(D_SYSSAVEDATA_IDX);
+    std::string nand_directory = FileUtil::GetUserPath(D_NAND_IDX);
     cfg_system_save_data = Common::make_unique<FileSys::Archive_SystemSaveData>(
-                           syssavedata_directory, CFG_SAVE_ID);
+                           nand_directory, CFG_SAVE_ID);
     if (!cfg_system_save_data->Initialize()) {
         LOG_CRITICAL(Service_CFG, "Could not initialize SystemSaveData archive for the CFG:U service");
         return;
diff --git a/src/core/hle/service/fs/archive.cpp b/src/core/hle/service/fs/archive.cpp
index f761c6ab9..958dd9344 100644
--- a/src/core/hle/service/fs/archive.cpp
+++ b/src/core/hle/service/fs/archive.cpp
@@ -36,6 +36,10 @@ namespace std {
     };
 }
 
+/// TODO(Subv): Confirm length of these strings
+const std::string SYSTEM_ID = "00000000000000000000000000000000";
+const std::string SDCARD_ID = "00000000000000000000000000000000";
+
 namespace Service {
 namespace FS {
 
@@ -432,11 +436,11 @@ ResultCode FormatSaveData() {
 void ArchiveInit() {
     next_handle = 1;
 
-    // TODO(Link Mauve): Add the other archive types (see here for the known types:
-    // http://3dbrew.org/wiki/FS:OpenArchive#Archive_idcodes).  Currently the only half-finished
-    // archive type is SDMC, so it is the only one getting exposed.
+    // TODO(Subv): Add the other archive types (see here for the known types:
+    // http://3dbrew.org/wiki/FS:OpenArchive#Archive_idcodes).
 
     std::string sdmc_directory = FileUtil::GetUserPath(D_SDMC_IDX);
+    std::string nand_directory = FileUtil::GetUserPath(D_NAND_IDX);
     auto sdmc_archive = Common::make_unique<FileSys::Archive_SDMC>(sdmc_directory);
     if (sdmc_archive->Initialize())
         CreateArchive(std::move(sdmc_archive), ArchiveIdCode::SDMC);
@@ -444,28 +448,24 @@ void ArchiveInit() {
         LOG_ERROR(Service_FS, "Can't instantiate SDMC archive with path %s", sdmc_directory.c_str());
     
     // Create the SaveData archive
-    std::string savedata_directory = FileUtil::GetUserPath(D_SAVEDATA_IDX);
-    auto savedata_archive = Common::make_unique<FileSys::Archive_SaveData>(savedata_directory);
+    auto savedata_archive = Common::make_unique<FileSys::Archive_SaveData>(sdmc_directory);
     CreateArchive(std::move(savedata_archive), ArchiveIdCode::SaveData);
 
-    std::string extsavedata_directory = FileUtil::GetUserPath(D_EXTSAVEDATA);
-    auto extsavedata_archive = Common::make_unique<FileSys::Archive_ExtSaveData>(extsavedata_directory);
+    auto extsavedata_archive = Common::make_unique<FileSys::Archive_ExtSaveData>(sdmc_directory, false);
     if (extsavedata_archive->Initialize())
         CreateArchive(std::move(extsavedata_archive), ArchiveIdCode::ExtSaveData);
     else
-        LOG_ERROR(Service_FS, "Can't instantiate ExtSaveData archive with path %s", extsavedata_directory.c_str());
+        LOG_ERROR(Service_FS, "Can't instantiate ExtSaveData archive with path %s", extsavedata_archive->GetMountPoint().c_str());
 
-    std::string sharedextsavedata_directory = FileUtil::GetUserPath(D_EXTSAVEDATA);
-    auto sharedextsavedata_archive = Common::make_unique<FileSys::Archive_ExtSaveData>(sharedextsavedata_directory);
+    auto sharedextsavedata_archive = Common::make_unique<FileSys::Archive_ExtSaveData>(nand_directory, true);
     if (sharedextsavedata_archive->Initialize())
         CreateArchive(std::move(sharedextsavedata_archive), ArchiveIdCode::SharedExtSaveData);
     else
         LOG_ERROR(Service_FS, "Can't instantiate SharedExtSaveData archive with path %s", 
-                  sharedextsavedata_directory.c_str());
+            sharedextsavedata_archive->GetMountPoint().c_str());
 
     // Create the SaveDataCheck archive, basically a small variation of the RomFS archive
-    std::string savedatacheck_directory = FileUtil::GetUserPath(D_SAVEDATACHECK_IDX);
-    auto savedatacheck_archive = Common::make_unique<FileSys::Archive_SaveDataCheck>(savedatacheck_directory);
+    auto savedatacheck_archive = Common::make_unique<FileSys::Archive_SaveDataCheck>(nand_directory);
     CreateArchive(std::move(savedatacheck_archive), ArchiveIdCode::SaveDataCheck);
 }
 
diff --git a/src/core/hle/service/fs/archive.h b/src/core/hle/service/fs/archive.h
index 9e9efa019..b3f2134f2 100644
--- a/src/core/hle/service/fs/archive.h
+++ b/src/core/hle/service/fs/archive.h
@@ -10,6 +10,11 @@
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/result.h"
 
+/// The unique system identifier hash, also known as ID0
+extern const std::string SYSTEM_ID;
+/// The scrambled SD card CID, also known as ID1
+extern const std::string SDCARD_ID;
+
 namespace Service {
 namespace FS {
 
diff --git a/src/core/hle/service/ptm_u.cpp b/src/core/hle/service/ptm_u.cpp
index 9cc700c46..fd79cd8ab 100644
--- a/src/core/hle/service/ptm_u.cpp
+++ b/src/core/hle/service/ptm_u.cpp
@@ -142,10 +142,10 @@ Interface::Interface() {
     Register(FunctionTable, ARRAY_SIZE(FunctionTable));
     // Create the SharedExtSaveData archive 0xF000000B and the gamecoin.dat file
     // TODO(Subv): In the future we should use the FS service to query this archive
-    std::string extsavedata_directory = FileUtil::GetUserPath(D_EXTSAVEDATA);
-    ptm_shared_extsavedata = Common::make_unique<FileSys::Archive_ExtSaveData>(extsavedata_directory);
+    std::string nand_directory = FileUtil::GetUserPath(D_NAND_IDX);
+    ptm_shared_extsavedata = Common::make_unique<FileSys::Archive_ExtSaveData>(nand_directory, true);
     if (!ptm_shared_extsavedata->Initialize()) {
-        LOG_CRITICAL(Service_PTM, "Could not initialize ExtSaveData archive for the PTM:U service");
+        LOG_CRITICAL(Service_PTM, "Could not initialize SharedExtSaveData archive for the PTM:U service");
         return;
     }
     FileSys::Path archive_path(ptm_shared_extdata_id);