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Code Issues Releases Activity

fs.mitm: Only create storage interface when needed.

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This commit is contained in:
Michael Scire 2018-11-04 12:45:29 -08:00
parent 158f7224a7
commit e786bc7e9a
4 changed files with 39 additions and 28 deletions
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12
stratosphere/fs_mitm/source/fsmitm_service.cpp
View file

@ -79,6 +79,7 @@ Result FsMitmService::OpenDataStorageByCurrentProcess(Out<std::shared_ptr<IStora
Log(armGetTls(), 0x100);
if (R_SUCCEEDED(rc)) {
if (Utils::HasSdRomfsContent(this->title_id)) {
/* TODO: Is there a sensible path that ends in ".romfs" we can use?" */
if (R_SUCCEEDED(Utils::OpenSdFileForAtmosphere(this->title_id, "romfs.bin", FS_OPEN_READ, &data_file))) {
storage = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<RomInterfaceStorage>(data_storage), std::make_shared<RomFileStorage>(data_file), this->title_id));
@ -89,6 +90,11 @@ Result FsMitmService::OpenDataStorageByCurrentProcess(Out<std::shared_ptr<IStora
if (out_storage.IsDomain()) {
out_domain_id = data_storage.s.object_id;
}
} else {
/* If we don't have anything to modify, there's no sense in maintaining a copy of the metadata tables. */
fsStorageClose(&data_storage);
rc = RESULT_FORWARD_TO_SESSION;
}
}
}
@ -117,6 +123,7 @@ Result FsMitmService::OpenDataStorageByDataId(Out<std::shared_ptr<IStorageInterf
rc = fsOpenDataStorageByDataIdFwd(this->forward_service.get(), storage_id, data_id, &data_storage);
if (R_SUCCEEDED(rc)) {
if (Utils::HasSdRomfsContent(data_id)) {
/* TODO: Is there a sensible path that ends in ".romfs" we can use?" */
if (R_SUCCEEDED(Utils::OpenSdFileForAtmosphere(data_id, "romfs.bin", FS_OPEN_READ, &data_file))) {
storage = std::make_shared<IStorageInterface>(new LayeredRomFS(std::make_shared<RomInterfaceStorage>(data_storage), std::make_shared<RomFileStorage>(data_file), data_id));
@ -126,6 +133,11 @@ Result FsMitmService::OpenDataStorageByDataId(Out<std::shared_ptr<IStorageInterf
if (out_storage.IsDomain()) {
out_domain_id = data_storage.s.object_id;
}
} else {
/* If we don't have anything to modify, there's no sense in maintaining a copy of the metadata tables. */
fsStorageClose(&data_storage);
rc = RESULT_FORWARD_TO_SESSION;
}
}
return rc;

16
stratosphere/fs_mitm/source/fsmitm_utils.cpp
View file

@ -201,20 +201,18 @@ Result Utils::OpenRomFSDir(FsFileSystem *fs, u64 title_id, const char *path, FsD
return fsFsOpenDirectory(fs, safe_path, FS_DIROPEN_DIRECTORY | FS_DIROPEN_FILE, out);
}
Result Utils::HasSdRomfsContent(u64 title_id, bool *out) {
Result rc;
bool Utils::HasSdRomfsContent(u64 title_id) {
FsDir dir;
if (R_FAILED((rc = Utils::OpenRomFSSdDir(title_id, "", &dir)))) {
return rc;
if (R_FAILED(Utils::OpenRomFSSdDir(title_id, "", &dir))) {
return false;
}
ON_SCOPE_EXIT {
fsDirClose(&dir);
};
FsDirectoryEntry dir_entry;
u64 read_entries;
if (R_SUCCEEDED((rc = fsDirRead(&dir, 0, &read_entries, 1, &dir_entry)))) {
*out = (read_entries == 1);
}
fsDirClose(&dir);
return rc;
return R_SUCCEEDED(fsDirRead(&dir, 0, &read_entries, 1, &dir_entry)) && read_entries == 1;
}
bool Utils::HasSdMitMFlag(u64 tid) {

3
stratosphere/fs_mitm/source/fsmitm_utils.hpp
View file

@ -28,11 +28,10 @@ class Utils {
static Result OpenSdDirForAtmosphere(u64 title_id, const char *path, FsDir *out);
static Result OpenRomFSSdDir(u64 title_id, const char *path, FsDir *out);
static Result OpenRomFSFile(FsFileSystem *fs, u64 title_id, const char *fn, int flags, FsFile *out);
static Result OpenRomFSDir(FsFileSystem *fs, u64 title_id, const char *path, FsDir *out);
static Result HasSdRomfsContent(u64 title_id, bool *out);
static bool HasSdRomfsContent(u64 title_id);
/* SD card Initialization + MitM detection. */
static void InitializeSdThreadFunc(void *args);

4
stratosphere/libstratosphere/include/stratosphere/mitm/mitm_session.hpp
View file

@ -21,6 +21,8 @@
#include "mitm_query_service.hpp"
#define RESULT_FORWARD_TO_SESSION 0xCAFEFC
class MitmSession final : public ServiceSession {
private:
/* This will be for the actual session. */
@ -149,7 +151,7 @@ class MitmSession final : public ServiceSession {
}
}
if (!found_entry) {
if (!found_entry || rc == RESULT_FORWARD_TO_SESSION) {
memcpy(armGetTls(), this->backup_tls, sizeof(this->backup_tls));
rc = ForwardRequest(ctx);
}