libmocha/source/devoptab/devoptab_fs.cpp

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#include "devoptab_fs.h"
#include "logger.h"
#include "mocha/mocha.h"
#include <coreinit/cache.h>
#include <coreinit/filesystem_fsa.h>
#include <mutex>
static const devoptab_t fsa_default_devoptab = {
.structSize = sizeof(__fsa_file_t),
.open_r = __fsa_open,
.close_r = __fsa_close,
.write_r = __fsa_write,
.read_r = __fsa_read,
.seek_r = __fsa_seek,
.fstat_r = __fsa_fstat,
.stat_r = __fsa_stat,
.link_r = __fsa_link,
.unlink_r = __fsa_unlink,
.chdir_r = __fsa_chdir,
.rename_r = __fsa_rename,
.mkdir_r = __fsa_mkdir,
.dirStateSize = sizeof(__fsa_dir_t),
.diropen_r = __fsa_diropen,
.dirreset_r = __fsa_dirreset,
.dirnext_r = __fsa_dirnext,
.dirclose_r = __fsa_dirclose,
.statvfs_r = __fsa_statvfs,
.ftruncate_r = __fsa_ftruncate,
.fsync_r = __fsa_fsync,
.chmod_r = __fsa_chmod,
.fchmod_r = __fsa_fchmod,
.rmdir_r = __fsa_rmdir,
.lstat_r = __fsa_stat,
.utimes_r = __fsa_utimes,
};
static bool fsa_initialised = false;
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static FSADeviceData fsa_mounts[0x10];
static void fsaResetMount(FSADeviceData *mount, uint32_t id) {
*mount = {};
memcpy(&mount->device, &fsa_default_devoptab, sizeof(fsa_default_devoptab));
mount->device.name = mount->name;
mount->device.deviceData = mount;
mount->id = id;
mount->setup = false;
mount->mounted = false;
mount->clientHandle = -1;
mount->deviceSizeInSectors = 0;
mount->deviceSectorSize = 0;
memset(mount->mount_path, 0, sizeof(mount->mount_path));
memset(mount->name, 0, sizeof(mount->name));
DCFlushRange(mount, sizeof(*mount));
}
void fsaInit() {
if (!fsa_initialised) {
uint32_t total = sizeof(fsa_mounts) / sizeof(fsa_mounts[0]);
for (uint32_t i = 0; i < total; i++) {
fsaResetMount(&fsa_mounts[i], i);
}
fsa_initialised = true;
}
}
std::mutex fsaMutex;
FSADeviceData *fsa_alloc() {
uint32_t i;
uint32_t total = sizeof(fsa_mounts) / sizeof(fsa_mounts[0]);
FSADeviceData *mount;
fsaInit();
for (i = 0; i < total; i++) {
mount = &fsa_mounts[i];
if (!mount->setup) {
return mount;
}
}
return nullptr;
}
static void fsa_free(FSADeviceData *mount) {
FSError res;
if (mount->mounted) {
if ((res = FSAUnmount(mount->clientHandle, mount->mount_path, FSA_UNMOUNT_FLAG_FORCE)) < 0) {
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DEBUG_FUNCTION_LINE_WARN("FSAUnmount %s for %s failed: %s", mount->mount_path, mount->name, FSAGetStatusStr(res));
}
}
res = FSADelClient(mount->clientHandle);
if (res < 0) {
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DEBUG_FUNCTION_LINE_WARN("FSADelClient for %s failed: %s", mount->name, FSAGetStatusStr(res));
}
fsaResetMount(mount, mount->id);
}
MochaUtilsStatus Mocha_UnmountFS(const char *virt_name) {
if (!virt_name) {
return MOCHA_RESULT_INVALID_ARGUMENT;
}
std::lock_guard<std::mutex> lock(fsaMutex);
uint32_t total = sizeof(fsa_mounts) / sizeof(fsa_mounts[0]);
fsaInit();
for (uint32_t i = 0; i < total; i++) {
FSADeviceData *mount = &fsa_mounts[i];
if (!mount->setup) {
continue;
}
if (strcmp(mount->name, virt_name) == 0) {
RemoveDevice(mount->name);
fsa_free(mount);
return MOCHA_RESULT_SUCCESS;
}
}
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DEBUG_FUNCTION_LINE_WARN("Failed to find fsa mount data for %s", virt_name);
return MOCHA_RESULT_NOT_FOUND;
}
extern int mochaInitDone;
MochaUtilsStatus Mocha_MountFS(const char *virt_name, const char *dev_path, const char *mount_path) {
return Mocha_MountFSEx(virt_name, dev_path, mount_path, FSA_MOUNT_FLAG_GLOBAL_MOUNT, nullptr, 0);
}
MochaUtilsStatus Mocha_MountFSEx(const char *virt_name, const char *dev_path, const char *mount_path, FSAMountFlags mountFlags, void *mountArgBuf, int mountArgBufLen) {
if (!mochaInitDone) {
if (Mocha_InitLibrary() != MOCHA_RESULT_SUCCESS) {
DEBUG_FUNCTION_LINE_ERR("Mocha_InitLibrary failed");
return MOCHA_RESULT_UNSUPPORTED_COMMAND;
}
}
FSAInit();
std::lock_guard<std::mutex> lock(fsaMutex);
FSADeviceData *mount = fsa_alloc();
if (mount == nullptr) {
DEBUG_FUNCTION_LINE_ERR("fsa_alloc() failed");
OSMemoryBarrier();
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return MOCHA_RESULT_MAX_CLIENT;
}
mount->clientHandle = FSAAddClient(nullptr);
if (mount->clientHandle < 0) {
DEBUG_FUNCTION_LINE_ERR("FSAAddClient() failed: %s", FSAGetStatusStr(static_cast<FSError>(mount->clientHandle)));
fsa_free(mount);
return MOCHA_RESULT_MAX_CLIENT;
}
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MochaUtilsStatus status;
if ((status = Mocha_UnlockFSClientEx(mount->clientHandle)) != MOCHA_RESULT_SUCCESS) {
DEBUG_FUNCTION_LINE_ERR("Mocha_UnlockFSClientEx failed: %s", Mocha_GetStatusStr(status));
return MOCHA_RESULT_UNSUPPORTED_COMMAND;
}
mount->mounted = false;
strncpy(mount->name, virt_name, sizeof(mount->name) - 1);
strncpy(mount->mount_path, mount_path, sizeof(mount->mount_path) - 1);
FSError res;
if (dev_path) {
res = FSAMount(mount->clientHandle, dev_path, mount_path, mountFlags, mountArgBuf, mountArgBufLen);
if (res < 0) {
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DEBUG_FUNCTION_LINE_ERR("FSAMount(0x%08X, %s, %s, %08X, %08X, %08X) failed: %s", mount->clientHandle, dev_path, mount_path, mountFlags, mountArgBuf, mountArgBufLen, FSAGetStatusStr(res));
fsa_free(mount);
if (res == FS_ERROR_ALREADY_EXISTS) {
return MOCHA_RESULT_ALREADY_EXISTS;
}
return MOCHA_RESULT_UNKNOWN_ERROR;
}
mount->mounted = true;
} else {
mount->mounted = false;
}
if ((res = FSAChangeDir(mount->clientHandle, mount->mount_path)) < 0) {
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DEBUG_FUNCTION_LINE_WARN("FSAChangeDir(0x%08X, %s) failed: %s", mount->clientHandle, mount->mount_path, FSAGetStatusStr(res));
}
FSADeviceInfo deviceInfo;
if ((res = FSAGetDeviceInfo(mount->clientHandle, mount_path, &deviceInfo)) >= 0) {
mount->deviceSizeInSectors = deviceInfo.deviceSizeInSectors;
mount->deviceSectorSize = deviceInfo.deviceSectorSize;
} else {
mount->deviceSizeInSectors = 0xFFFFFFFF;
mount->deviceSectorSize = 512;
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DEBUG_FUNCTION_LINE_WARN("Failed to get DeviceInfo for %s: %s", mount_path, FSAGetStatusStr(res));
}
if (AddDevice(&mount->device) < 0) {
DEBUG_FUNCTION_LINE_ERR("AddDevice failed for %s.", virt_name);
fsa_free(mount);
return MOCHA_RESULT_ADD_DEVOPTAB_FAILED;
}
mount->setup = true;
return MOCHA_RESULT_SUCCESS;
}