MTP FFS updates:
This update splits old MTP code and new MTP code from Google
into two trees, legacy and ffs. Depending on the SDK level,
the build system will select the correct version. The reason
for separating the versions out are due to older android trees
not supporting the updated MTP code from Google.
Most MTP code is from Google, with additions needed from
implementing the Java functions in C++ for TWRP and FFS.
We assume if you are in android-9.0 or above, your kernel
has support for FFS over MTP. Verify that your init.rc
is mounting the MTP FFS driver to the proper location.
Change-Id: I4b107b239bd9bc5699527f9c8c77d9079f264a7e
diff --git a/mtp/ffs/mtp_MtpServer.cpp b/mtp/ffs/mtp_MtpServer.cpp
new file mode 100755
index 0000000..ce890d1
--- /dev/null
+++ b/mtp/ffs/mtp_MtpServer.cpp
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Additional Copyright (C) 2018 TeamWin
+ */
+
+#include <utils/Log.h>
+
+#include <stdio.h>
+#include <assert.h>
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <vector>
+#include <utils/threads.h>
+#include <pthread.h>
+#include <cutils/properties.h>
+
+#include "mtp_MtpServer.hpp"
+#include "MtpServer.h"
+#include "MtpStorage.h"
+#include "MtpDebug.h"
+#include "MtpDescriptors.h"
+#include "MtpMessage.hpp"
+#include "mtp_MtpDatabase.hpp"
+
+#include <string>
+
+void twmtp_MtpServer::set_device_info() {
+ char property[512];
+ property_get("ro.build.product", property, "unknown manufacturer");
+ mtpinfo.deviceInfoManufacturer = MtpStringBuffer(property);
+ property_get("ro.product.model", property, "unknown model");
+ mtpinfo.deviceInfoModel = MtpStringBuffer(property);
+ mtpinfo.deviceInfoDeviceVersion = MtpStringBuffer("None");
+ property_get("ro.serialno", property, "unknown serial number");
+ mtpinfo.deviceInfoSerialNumber = MtpStringBuffer(property);
+}
+
+void twmtp_MtpServer::start()
+{
+ int controlFd = 0;
+
+ usePtp = false;
+ IMtpDatabase* mtpdb = new IMtpDatabase();
+ MTPD("launching server\n");
+ /* Sleep for a bit before we open the MTP USB device because some
+ * devices are not ready due to the kernel not responding to our
+ * sysfs requests right away.
+ */
+ usleep(800000);
+#ifdef USB_MTP_DEVICE
+#define STRINGIFY(x) #x
+#define EXPAND(x) STRINGIFY(x)
+ const char* mtp_device = EXPAND(USB_MTP_DEVICE);
+ MTPI("Using '%s' for MTP device.\n", EXPAND(USB_MTP_DEVICE));
+#else
+ const char* mtp_device = "/dev/mtp_usb";
+#endif
+ bool ffs_ok = access(FFS_MTP_EP0, W_OK) == 0;
+ if (ffs_ok) {
+ MTPD("Opening FFS EPO\n");
+ controlFd = open(FFS_MTP_EP0, O_RDWR);
+ } else {
+ controlFd = open(mtp_device, O_WRONLY);
+ }
+ if (controlFd < 0) {
+ MTPE("could not open MTP driver, errno: %d\n", errno);
+ return;
+ }
+ MTPD("MTP fd: %d\n", controlFd);
+
+ server = new MtpServer(mtpdb,\
+ controlFd,\
+ usePtp,\
+ mtpinfo.deviceInfoManufacturer, \
+ mtpinfo.deviceInfoModel, \
+ mtpinfo.deviceInfoDeviceVersion, \
+ mtpinfo.deviceInfoSerialNumber);
+ refserver = server;
+ MTPI("created new mtpserver object\n");
+ add_storage();
+ MTPD("Starting add / remove mtppipe monitor thread\n");
+ pthread_t thread;
+ ThreadPtr mtpptr = &twmtp_MtpServer::mtppipe_thread;
+ PThreadPtr p = *(PThreadPtr*)&mtpptr;
+ pthread_create(&thread, NULL, p, this);
+ // This loop restarts the MTP process if the device is unplugged and replugged in
+ while (true) {
+ server->run();
+ usleep(800000);
+ }
+}
+
+void twmtp_MtpServer::set_storages(storages* mtpstorages) {
+ stores = mtpstorages;
+}
+
+void twmtp_MtpServer::cleanup()
+{
+ android::Mutex sMutex;
+ android::Mutex::Autolock autoLock(sMutex);
+
+ if (server) {
+ delete server;
+ } else {
+ MTPD("server is null in cleanup");
+ }
+}
+
+void twmtp_MtpServer::send_object_added(int handle)
+{
+ android::Mutex sMutex;
+ android::Mutex::Autolock autoLock(sMutex);
+
+ if (server)
+ server->sendObjectAdded(handle);
+ else
+ MTPD("server is null in send_object_added");
+}
+
+void twmtp_MtpServer::send_object_removed(int handle)
+{
+ android::Mutex sMutex;
+ android::Mutex::Autolock autoLock(sMutex);
+
+ if (server)
+ server->sendObjectRemoved(handle);
+ else
+ MTPD("server is null in send_object_removed");
+}
+
+void twmtp_MtpServer::add_storage()
+{
+ android::Mutex sMutex;
+ android::Mutex::Autolock autoLock(sMutex);
+
+ MTPD("twmtp_MtpServer::add_storage count of storage devices: %i\n", stores->size());
+ for (unsigned int i = 0; i < stores->size(); ++i) {
+ std::string pathStr = stores->at(i)->mount;
+
+ if (!pathStr.empty()) {
+ std::string descriptionStr = stores->at(i)->display;
+ int storageID = stores->at(i)->mtpid;
+ bool removable = false;
+ uint64_t maxFileSize = stores->at(i)->maxFileSize;
+ if (descriptionStr != "") {
+ MtpStorage* storage = new MtpStorage(storageID, &pathStr[0], &descriptionStr[0], removable, maxFileSize, refserver);
+ server->addStorage(storage);
+ }
+ }
+ }
+}
+
+void twmtp_MtpServer::remove_storage(int storageId)
+{
+ android::Mutex sMutex;
+ android::Mutex::Autolock autoLock(sMutex);
+
+ if (server) {
+ MtpStorage* storage = server->getStorage(storageId);
+ if (storage) {
+ MTPD("twmtp_MtpServer::remove_storage calling removeStorage\n");
+ server->removeStorage(storage);
+ }
+ } else
+ MTPD("server is null in remove_storage");
+ MTPD("twmtp_MtpServer::remove_storage DONE\n");
+}
+
+int twmtp_MtpServer::mtppipe_thread(void)
+{
+ if (mtp_read_pipe == -1) {
+ MTPD("mtppipe_thread exiting because mtp_read_pipe not set\n");
+ return 0;
+ }
+ MTPD("Starting twmtp_MtpServer::mtppipe_thread\n");
+ int read_count;
+ struct mtpmsg mtp_message;
+ while (1) {
+ read_count = ::read(mtp_read_pipe, &mtp_message, sizeof(mtp_message));
+ MTPD("read %i from mtppipe\n", read_count);
+ if (read_count == sizeof(mtp_message)) {
+ if (mtp_message.message_type == MTP_MESSAGE_ADD_STORAGE) {
+ MTPI("mtppipe add storage %i '%s'\n", mtp_message.storage_id, mtp_message.path);
+ if (mtp_message.storage_id) {
+ bool removable = false;
+ MtpStorage* storage = new MtpStorage(mtp_message.storage_id, &mtp_message.path[0], &mtp_message.display[0], removable, mtp_message.maxFileSize, refserver);
+ server->addStorage(storage);
+ MTPD("mtppipe done adding storage\n");
+ } else {
+ MTPE("Invalid storage ID %i specified\n", mtp_message.storage_id);
+ }
+ } else if (mtp_message.message_type == MTP_MESSAGE_REMOVE_STORAGE) {
+ MTPI("mtppipe remove storage %i\n", mtp_message.storage_id);
+ remove_storage(mtp_message.storage_id);
+ MTPD("mtppipe done removing storage\n");
+ } else {
+ MTPE("Unknown mtppipe message value: %i\n", mtp_message.message_type);
+ }
+ } else {
+ MTPE("twmtp_MtpServer::mtppipe_thread unexpected read_count %i\n", read_count);
+ close(mtp_read_pipe);
+ break;
+ }
+ }
+ MTPD("twmtp_MtpServer::mtppipe_thread closing\n");
+ return 0;
+}
+
+void twmtp_MtpServer::set_read_pipe(int pipe)
+{
+ mtp_read_pipe = pipe;
+}