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Diffstat (limited to 'adb/daemon/file_sync_service.cpp')
-rw-r--r--adb/daemon/file_sync_service.cpp859
1 files changed, 0 insertions, 859 deletions
diff --git a/adb/daemon/file_sync_service.cpp b/adb/daemon/file_sync_service.cpp
deleted file mode 100644
index 513b8dd8f..000000000
--- a/adb/daemon/file_sync_service.cpp
+++ /dev/null
@@ -1,859 +0,0 @@
-/*
- * Copyright (C) 2007 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.
- */
-
-#define TRACE_TAG SYNC
-
-#include "daemon/file_sync_service.h"
-
-#include "sysdeps.h"
-
-#include <dirent.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <utime.h>
-
-#include <memory>
-#include <optional>
-#include <span>
-#include <string>
-#include <variant>
-#include <vector>
-
-#include <android-base/file.h>
-#include <android-base/macros.h>
-#include <android-base/stringprintf.h>
-#include <android-base/strings.h>
-
-#include <adbd_fs.h>
-
-// Needed for __android_log_security_bswrite.
-#include <private/android_logger.h>
-
-#if defined(__ANDROID__)
-#include <linux/capability.h>
-#include <selinux/android.h>
-#include <sys/xattr.h>
-#endif
-
-#include "adb.h"
-#include "adb_io.h"
-#include "adb_trace.h"
-#include "adb_utils.h"
-#include "compression_utils.h"
-#include "file_sync_protocol.h"
-#include "security_log_tags.h"
-#include "sysdeps/errno.h"
-
-using android::base::borrowed_fd;
-using android::base::Dirname;
-using android::base::StringPrintf;
-
-static bool should_use_fs_config(const std::string& path) {
-#if defined(__ANDROID__)
- // TODO: use fs_config to configure permissions on /data too.
- return !android::base::StartsWith(path, "/data/");
-#else
- UNUSED(path);
- return false;
-#endif
-}
-
-static bool update_capabilities(const char* path, uint64_t capabilities) {
-#if defined(__ANDROID__)
- if (capabilities == 0) {
- // Ensure we clean up in case the capabilities weren't 0 in the past.
- removexattr(path, XATTR_NAME_CAPS);
- return true;
- }
-
- vfs_cap_data cap_data = {};
- cap_data.magic_etc = VFS_CAP_REVISION_2 | VFS_CAP_FLAGS_EFFECTIVE;
- cap_data.data[0].permitted = (capabilities & 0xffffffff);
- cap_data.data[0].inheritable = 0;
- cap_data.data[1].permitted = (capabilities >> 32);
- cap_data.data[1].inheritable = 0;
- return setxattr(path, XATTR_NAME_CAPS, &cap_data, sizeof(cap_data), 0) != -1;
-#else
- UNUSED(path, capabilities);
- return true;
-#endif
-}
-
-static bool secure_mkdirs(const std::string& path) {
- if (path[0] != '/') return false;
-
- std::vector<std::string> path_components = android::base::Split(path, "/");
- std::string partial_path;
- for (const auto& path_component : path_components) {
- uid_t uid = -1;
- gid_t gid = -1;
- mode_t mode = 0775;
- uint64_t capabilities = 0;
-
- if (path_component.empty()) {
- continue;
- }
-
- if (partial_path.empty() || partial_path.back() != OS_PATH_SEPARATOR) {
- partial_path += OS_PATH_SEPARATOR;
- }
- partial_path += path_component;
-
- if (should_use_fs_config(partial_path)) {
- adbd_fs_config(partial_path.c_str(), 1, nullptr, &uid, &gid, &mode, &capabilities);
- }
- if (adb_mkdir(partial_path.c_str(), mode) == -1) {
- if (errno != EEXIST) {
- return false;
- }
- } else {
- if (chown(partial_path.c_str(), uid, gid) == -1) return false;
-
-#if defined(__ANDROID__)
- // Not all filesystems support setting SELinux labels. http://b/23530370.
- selinux_android_restorecon(partial_path.c_str(), 0);
-#endif
-
- if (!update_capabilities(partial_path.c_str(), capabilities)) return false;
- }
- }
- return true;
-}
-
-static bool do_lstat_v1(int s, const char* path) {
- syncmsg msg = {};
- msg.stat_v1.id = ID_LSTAT_V1;
-
- struct stat st = {};
- lstat(path, &st);
- msg.stat_v1.mode = st.st_mode;
- msg.stat_v1.size = st.st_size;
- msg.stat_v1.mtime = st.st_mtime;
- return WriteFdExactly(s, &msg.stat_v1, sizeof(msg.stat_v1));
-}
-
-static bool do_stat_v2(int s, uint32_t id, const char* path) {
- syncmsg msg = {};
- msg.stat_v2.id = id;
-
- decltype(&stat) stat_fn;
- if (id == ID_STAT_V2) {
- stat_fn = stat;
- } else {
- stat_fn = lstat;
- }
-
- struct stat st = {};
- int rc = stat_fn(path, &st);
- if (rc == -1) {
- msg.stat_v2.error = errno_to_wire(errno);
- } else {
- msg.stat_v2.dev = st.st_dev;
- msg.stat_v2.ino = st.st_ino;
- msg.stat_v2.mode = st.st_mode;
- msg.stat_v2.nlink = st.st_nlink;
- msg.stat_v2.uid = st.st_uid;
- msg.stat_v2.gid = st.st_gid;
- msg.stat_v2.size = st.st_size;
- msg.stat_v2.atime = st.st_atime;
- msg.stat_v2.mtime = st.st_mtime;
- msg.stat_v2.ctime = st.st_ctime;
- }
-
- return WriteFdExactly(s, &msg.stat_v2, sizeof(msg.stat_v2));
-}
-
-template <bool v2>
-static bool do_list(int s, const char* path) {
- dirent* de;
-
- using MessageType =
- std::conditional_t<v2, decltype(syncmsg::dent_v2), decltype(syncmsg::dent_v1)>;
- MessageType msg;
- uint32_t msg_id;
- if constexpr (v2) {
- msg_id = ID_DENT_V2;
- } else {
- msg_id = ID_DENT_V1;
- }
-
- std::unique_ptr<DIR, int(*)(DIR*)> d(opendir(path), closedir);
- if (!d) goto done;
-
- while ((de = readdir(d.get()))) {
- memset(&msg, 0, sizeof(msg));
- msg.id = msg_id;
-
- std::string filename(StringPrintf("%s/%s", path, de->d_name));
-
- struct stat st;
- if (lstat(filename.c_str(), &st) == 0) {
- msg.mode = st.st_mode;
- msg.size = st.st_size;
- msg.mtime = st.st_mtime;
-
- if constexpr (v2) {
- msg.dev = st.st_dev;
- msg.ino = st.st_ino;
- msg.nlink = st.st_nlink;
- msg.uid = st.st_uid;
- msg.gid = st.st_gid;
- msg.atime = st.st_atime;
- msg.ctime = st.st_ctime;
- }
- } else {
- if constexpr (v2) {
- msg.error = errno;
- } else {
- continue;
- }
- }
-
- size_t d_name_length = strlen(de->d_name);
- msg.namelen = d_name_length;
-
- if (!WriteFdExactly(s, &msg, sizeof(msg)) ||
- !WriteFdExactly(s, de->d_name, d_name_length)) {
- return false;
- }
- }
-
-done:
- memset(&msg, 0, sizeof(msg));
- msg.id = ID_DONE;
- return WriteFdExactly(s, &msg, sizeof(msg));
-}
-
-static bool do_list_v1(int s, const char* path) {
- return do_list<false>(s, path);
-}
-
-static bool do_list_v2(int s, const char* path) {
- return do_list<true>(s, path);
-}
-
-// Make sure that SendFail from adb_io.cpp isn't accidentally used in this file.
-#pragma GCC poison SendFail
-
-static bool SendSyncFail(borrowed_fd fd, const std::string& reason) {
- D("sync: failure: %s", reason.c_str());
-
- syncmsg msg;
- msg.data.id = ID_FAIL;
- msg.data.size = reason.size();
- return WriteFdExactly(fd, &msg.data, sizeof(msg.data)) && WriteFdExactly(fd, reason);
-}
-
-static bool SendSyncFailErrno(borrowed_fd fd, const std::string& reason) {
- return SendSyncFail(fd, StringPrintf("%s: %s", reason.c_str(), strerror(errno)));
-}
-
-static bool handle_send_file_data(borrowed_fd s, unique_fd fd, uint32_t* timestamp,
- CompressionType compression) {
- syncmsg msg;
- Block buffer(SYNC_DATA_MAX);
- std::span<char> buffer_span(buffer.data(), buffer.size());
- std::variant<std::monostate, NullDecoder, BrotliDecoder, LZ4Decoder, ZstdDecoder>
- decoder_storage;
- Decoder* decoder = nullptr;
-
- switch (compression) {
- case CompressionType::None:
- decoder = &decoder_storage.emplace<NullDecoder>(buffer_span);
- break;
-
- case CompressionType::Brotli:
- decoder = &decoder_storage.emplace<BrotliDecoder>(buffer_span);
- break;
-
- case CompressionType::LZ4:
- decoder = &decoder_storage.emplace<LZ4Decoder>(buffer_span);
- break;
-
- case CompressionType::Zstd:
- decoder = &decoder_storage.emplace<ZstdDecoder>(buffer_span);
- break;
-
- case CompressionType::Any:
- LOG(FATAL) << "unexpected CompressionType::Any";
- }
-
- while (true) {
- if (!ReadFdExactly(s, &msg.data, sizeof(msg.data))) return false;
-
- if (msg.data.id == ID_DONE) {
- *timestamp = msg.data.size;
- decoder->Finish();
- } else if (msg.data.id == ID_DATA) {
- Block block(msg.data.size);
- if (!ReadFdExactly(s, block.data(), msg.data.size)) return false;
- decoder->Append(std::move(block));
- } else {
- SendSyncFail(s, "invalid data message");
- return false;
- }
-
- while (true) {
- std::span<char> output;
- DecodeResult result = decoder->Decode(&output);
- if (result == DecodeResult::Error) {
- SendSyncFailErrno(s, "decompress failed");
- return false;
- }
-
- // fd is -1 if the client is pushing with --dry-run.
- if (fd != -1) {
- if (!WriteFdExactly(fd, output.data(), output.size())) {
- SendSyncFailErrno(s, "write failed");
- return false;
- }
- }
-
- if (result == DecodeResult::NeedInput) {
- break;
- } else if (result == DecodeResult::MoreOutput) {
- continue;
- } else if (result == DecodeResult::Done) {
- return true;
- } else {
- LOG(FATAL) << "invalid DecodeResult: " << static_cast<int>(result);
- }
- }
- }
-
- __builtin_unreachable();
-}
-
-static bool handle_send_file(borrowed_fd s, const char* path, uint32_t* timestamp, uid_t uid,
- gid_t gid, uint64_t capabilities, mode_t mode,
- CompressionType compression, bool dry_run, std::vector<char>& buffer,
- bool do_unlink) {
- syncmsg msg;
- unique_fd fd;
-
- if (!dry_run) {
- __android_log_security_bswrite(SEC_TAG_ADB_SEND_FILE, path);
- fd.reset(adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode));
-
- if (fd < 0 && errno == ENOENT) {
- if (!secure_mkdirs(Dirname(path))) {
- SendSyncFailErrno(s, "secure_mkdirs failed");
- goto fail;
- }
- fd.reset(adb_open_mode(path, O_WRONLY | O_CREAT | O_EXCL | O_CLOEXEC, mode));
- }
- if (fd < 0 && errno == EEXIST) {
- fd.reset(adb_open_mode(path, O_WRONLY | O_CLOEXEC, mode));
- }
- if (fd < 0) {
- SendSyncFailErrno(s, "couldn't create file");
- goto fail;
- } else {
- if (fchown(fd.get(), uid, gid) == -1) {
- SendSyncFailErrno(s, "fchown failed");
- goto fail;
- }
-
-#if defined(__ANDROID__)
- // Not all filesystems support setting SELinux labels. http://b/23530370.
- selinux_android_restorecon(path, 0);
-#endif
-
- // fchown clears the setuid bit - restore it if present.
- // Ignore the result of calling fchmod. It's not supported
- // by all filesystems, so we don't check for success. b/12441485
- fchmod(fd.get(), mode);
- }
-
- int rc = posix_fadvise(fd.get(), 0, 0,
- POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE | POSIX_FADV_WILLNEED);
- if (rc != 0) {
- D("[ Failed to fadvise: %s ]", strerror(rc));
- }
- }
-
- if (!handle_send_file_data(s, std::move(fd), timestamp, compression)) {
- goto fail;
- }
-
- if (!update_capabilities(path, capabilities)) {
- SendSyncFailErrno(s, "update_capabilities failed");
- goto fail;
- }
-
- msg.status.id = ID_OKAY;
- msg.status.msglen = 0;
- return WriteFdExactly(s, &msg.status, sizeof(msg.status));
-
-fail:
- // If there's a problem on the device, we'll send an ID_FAIL message and
- // close the socket. Unfortunately the kernel will sometimes throw that
- // data away if the other end keeps writing without reading (which is
- // the case with old versions of adb). To maintain compatibility, keep
- // reading and throwing away ID_DATA packets until the other side notices
- // that we've reported an error.
- while (true) {
- if (!ReadFdExactly(s, &msg.data, sizeof(msg.data))) break;
-
- if (msg.data.id == ID_DONE) {
- break;
- } else if (msg.data.id != ID_DATA) {
- char id[5];
- memcpy(id, &msg.data.id, sizeof(msg.data.id));
- id[4] = '\0';
- D("handle_send_fail received unexpected id '%s' during failure", id);
- break;
- }
-
- if (msg.data.size > buffer.size()) {
- D("handle_send_fail received oversized packet of length '%u' during failure",
- msg.data.size);
- break;
- }
-
- if (!ReadFdExactly(s, &buffer[0], msg.data.size)) break;
- }
-
- if (do_unlink) adb_unlink(path);
- return false;
-}
-
-#if defined(_WIN32)
-extern bool handle_send_link(int s, const std::string& path,
- uint32_t* timestamp, std::vector<char>& buffer)
- __attribute__((error("no symlinks on Windows")));
-#else
-static bool handle_send_link(int s, const std::string& path, uint32_t* timestamp, bool dry_run,
- std::vector<char>& buffer) {
- syncmsg msg;
-
- if (!ReadFdExactly(s, &msg.data, sizeof(msg.data))) return false;
-
- if (msg.data.id != ID_DATA) {
- SendSyncFail(s, "invalid data message: expected ID_DATA");
- return false;
- }
-
- unsigned int len = msg.data.size;
- if (len > buffer.size()) { // TODO: resize buffer?
- SendSyncFail(s, "oversize data message");
- return false;
- }
- if (!ReadFdExactly(s, &buffer[0], len)) return false;
-
- std::string buf_link;
- if (!dry_run) {
- if (!android::base::Readlink(path, &buf_link) || (buf_link != &buffer[0])) {
- adb_unlink(path.c_str());
- auto ret = symlink(&buffer[0], path.c_str());
- if (ret && errno == ENOENT) {
- if (!secure_mkdirs(Dirname(path))) {
- SendSyncFailErrno(s, "secure_mkdirs failed");
- return false;
- }
- ret = symlink(&buffer[0], path.c_str());
- }
- if (ret) {
- SendSyncFailErrno(s, "symlink failed");
- return false;
- }
- }
- }
-
- if (!ReadFdExactly(s, &msg.data, sizeof(msg.data))) return false;
-
- if (msg.data.id == ID_DONE) {
- *timestamp = msg.data.size;
- msg.status.id = ID_OKAY;
- msg.status.msglen = 0;
- if (!WriteFdExactly(s, &msg.status, sizeof(msg.status))) return false;
- } else {
- SendSyncFail(s, "invalid data message: expected ID_DONE");
- return false;
- }
-
- return true;
-}
-#endif
-
-static bool send_impl(int s, const std::string& path, mode_t mode, CompressionType compression,
- bool dry_run, std::vector<char>& buffer) {
- // Don't delete files before copying if they are not "regular" or symlinks.
- struct stat st;
- bool do_unlink = false;
- if (!dry_run) {
- do_unlink = (lstat(path.c_str(), &st) == -1) || S_ISREG(st.st_mode) ||
- (S_ISLNK(st.st_mode) && !S_ISLNK(mode));
- }
- if (do_unlink) {
- adb_unlink(path.c_str());
- }
-
- bool result;
- uint32_t timestamp;
- if (S_ISLNK(mode)) {
- result = handle_send_link(s, path, &timestamp, dry_run, buffer);
- } else {
- // Copy user permission bits to "group" and "other" permissions.
- mode &= 0777;
- mode |= ((mode >> 3) & 0070);
- mode |= ((mode >> 3) & 0007);
-
- uid_t uid = -1;
- gid_t gid = -1;
- uint64_t capabilities = 0;
- if (should_use_fs_config(path) && !dry_run) {
- adbd_fs_config(path.c_str(), 0, nullptr, &uid, &gid, &mode, &capabilities);
- }
-
- result = handle_send_file(s, path.c_str(), &timestamp, uid, gid, capabilities, mode,
- compression, dry_run, buffer, do_unlink);
- }
-
- if (!result) {
- return false;
- }
-
- struct timeval tv[2];
- tv[0].tv_sec = timestamp;
- tv[0].tv_usec = 0;
- tv[1].tv_sec = timestamp;
- tv[1].tv_usec = 0;
- lutimes(path.c_str(), tv);
- return true;
-}
-
-static bool do_send_v1(int s, const std::string& spec, std::vector<char>& buffer) {
- // 'spec' is of the form "/some/path,0755". Break it up.
- size_t comma = spec.find_last_of(',');
- if (comma == std::string::npos) {
- SendSyncFail(s, "missing , in ID_SEND_V1");
- return false;
- }
-
- std::string path = spec.substr(0, comma);
-
- errno = 0;
- mode_t mode = strtoul(spec.substr(comma + 1).c_str(), nullptr, 0);
- if (errno != 0) {
- SendSyncFail(s, "bad mode");
- return false;
- }
-
- return send_impl(s, path, mode, CompressionType::None, false, buffer);
-}
-
-static bool do_send_v2(int s, const std::string& path, std::vector<char>& buffer) {
- // Read the setup packet.
- syncmsg msg;
- int rc = ReadFdExactly(s, &msg.send_v2_setup, sizeof(msg.send_v2_setup));
- if (rc == 0) {
- LOG(ERROR) << "failed to read send_v2 setup packet: EOF";
- return false;
- } else if (rc < 0) {
- PLOG(ERROR) << "failed to read send_v2 setup packet";
- }
-
- bool dry_run = false;
- std::optional<CompressionType> compression;
-
- uint32_t orig_flags = msg.send_v2_setup.flags;
- if (msg.send_v2_setup.flags & kSyncFlagBrotli) {
- msg.send_v2_setup.flags &= ~kSyncFlagBrotli;
- if (compression) {
- SendSyncFail(s, android::base::StringPrintf("multiple compression flags received: %d",
- orig_flags));
- return false;
- }
- compression = CompressionType::Brotli;
- }
- if (msg.send_v2_setup.flags & kSyncFlagLZ4) {
- msg.send_v2_setup.flags &= ~kSyncFlagLZ4;
- if (compression) {
- SendSyncFail(s, android::base::StringPrintf("multiple compression flags received: %d",
- orig_flags));
- return false;
- }
- compression = CompressionType::LZ4;
- }
- if (msg.send_v2_setup.flags & kSyncFlagZstd) {
- msg.send_v2_setup.flags &= ~kSyncFlagZstd;
- if (compression) {
- SendSyncFail(s, android::base::StringPrintf("multiple compression flags received: %d",
- orig_flags));
- return false;
- }
- compression = CompressionType::Zstd;
- }
- if (msg.send_v2_setup.flags & kSyncFlagDryRun) {
- msg.send_v2_setup.flags &= ~kSyncFlagDryRun;
- dry_run = true;
- }
-
- if (msg.send_v2_setup.flags) {
- SendSyncFail(s, android::base::StringPrintf("unknown flags: %d", msg.send_v2_setup.flags));
- return false;
- }
-
- errno = 0;
- return send_impl(s, path, msg.send_v2_setup.mode, compression.value_or(CompressionType::None),
- dry_run, buffer);
-}
-
-static bool recv_impl(borrowed_fd s, const char* path, CompressionType compression,
- std::vector<char>& buffer) {
- __android_log_security_bswrite(SEC_TAG_ADB_RECV_FILE, path);
-
- unique_fd fd(adb_open(path, O_RDONLY | O_CLOEXEC));
- if (fd < 0) {
- SendSyncFailErrno(s, "open failed");
- return false;
- }
-
- int rc = posix_fadvise(fd.get(), 0, 0, POSIX_FADV_SEQUENTIAL | POSIX_FADV_NOREUSE);
- if (rc != 0) {
- D("[ Failed to fadvise: %s ]", strerror(rc));
- }
-
- syncmsg msg;
- msg.data.id = ID_DATA;
-
- std::variant<std::monostate, NullEncoder, BrotliEncoder, LZ4Encoder, ZstdEncoder>
- encoder_storage;
- Encoder* encoder;
-
- switch (compression) {
- case CompressionType::None:
- encoder = &encoder_storage.emplace<NullEncoder>(SYNC_DATA_MAX);
- break;
-
- case CompressionType::Brotli:
- encoder = &encoder_storage.emplace<BrotliEncoder>(SYNC_DATA_MAX);
- break;
-
- case CompressionType::LZ4:
- encoder = &encoder_storage.emplace<LZ4Encoder>(SYNC_DATA_MAX);
- break;
-
- case CompressionType::Zstd:
- encoder = &encoder_storage.emplace<ZstdEncoder>(SYNC_DATA_MAX);
- break;
-
- case CompressionType::Any:
- LOG(FATAL) << "unexpected CompressionType::Any";
- }
-
- bool sending = true;
- while (sending) {
- Block input(SYNC_DATA_MAX);
- int r = adb_read(fd.get(), input.data(), input.size());
- if (r < 0) {
- SendSyncFailErrno(s, "read failed");
- return false;
- }
-
- if (r == 0) {
- encoder->Finish();
- } else {
- input.resize(r);
- encoder->Append(std::move(input));
- }
-
- while (true) {
- Block output;
- EncodeResult result = encoder->Encode(&output);
- if (result == EncodeResult::Error) {
- SendSyncFailErrno(s, "compress failed");
- return false;
- }
-
- if (!output.empty()) {
- msg.data.size = output.size();
- if (!WriteFdExactly(s, &msg.data, sizeof(msg.data)) ||
- !WriteFdExactly(s, output.data(), output.size())) {
- return false;
- }
- }
-
- if (result == EncodeResult::Done) {
- sending = false;
- break;
- } else if (result == EncodeResult::NeedInput) {
- break;
- } else if (result == EncodeResult::MoreOutput) {
- continue;
- }
- }
- }
-
- msg.data.id = ID_DONE;
- msg.data.size = 0;
- return WriteFdExactly(s, &msg.data, sizeof(msg.data));
-}
-
-static bool do_recv_v1(borrowed_fd s, const char* path, std::vector<char>& buffer) {
- return recv_impl(s, path, CompressionType::None, buffer);
-}
-
-static bool do_recv_v2(borrowed_fd s, const char* path, std::vector<char>& buffer) {
- syncmsg msg;
- // Read the setup packet.
- int rc = ReadFdExactly(s, &msg.recv_v2_setup, sizeof(msg.recv_v2_setup));
- if (rc == 0) {
- LOG(ERROR) << "failed to read recv_v2 setup packet: EOF";
- return false;
- } else if (rc < 0) {
- PLOG(ERROR) << "failed to read recv_v2 setup packet";
- }
-
- std::optional<CompressionType> compression;
- uint32_t orig_flags = msg.recv_v2_setup.flags;
- if (msg.recv_v2_setup.flags & kSyncFlagBrotli) {
- msg.recv_v2_setup.flags &= ~kSyncFlagBrotli;
- if (compression) {
- SendSyncFail(s, android::base::StringPrintf("multiple compression flags received: %d",
- orig_flags));
- return false;
- }
- compression = CompressionType::Brotli;
- }
- if (msg.recv_v2_setup.flags & kSyncFlagLZ4) {
- msg.recv_v2_setup.flags &= ~kSyncFlagLZ4;
- if (compression) {
- SendSyncFail(s, android::base::StringPrintf("multiple compression flags received: %d",
- orig_flags));
- return false;
- }
- compression = CompressionType::LZ4;
- }
- if (msg.recv_v2_setup.flags & kSyncFlagZstd) {
- msg.recv_v2_setup.flags &= ~kSyncFlagZstd;
- if (compression) {
- SendSyncFail(s, android::base::StringPrintf("multiple compression flags received: %d",
- orig_flags));
- return false;
- }
- compression = CompressionType::Zstd;
- }
-
- if (msg.recv_v2_setup.flags) {
- SendSyncFail(s, android::base::StringPrintf("unknown flags: %d", msg.recv_v2_setup.flags));
- return false;
- }
-
- return recv_impl(s, path, compression.value_or(CompressionType::None), buffer);
-}
-
-static const char* sync_id_to_name(uint32_t id) {
- switch (id) {
- case ID_LSTAT_V1:
- return "lstat_v1";
- case ID_LSTAT_V2:
- return "lstat_v2";
- case ID_STAT_V2:
- return "stat_v2";
- case ID_LIST_V1:
- return "list_v1";
- case ID_LIST_V2:
- return "list_v2";
- case ID_SEND_V1:
- return "send_v1";
- case ID_SEND_V2:
- return "send_v2";
- case ID_RECV_V1:
- return "recv_v1";
- case ID_RECV_V2:
- return "recv_v2";
- case ID_QUIT:
- return "quit";
- default:
- return "???";
- }
-}
-
-static bool handle_sync_command(int fd, std::vector<char>& buffer) {
- D("sync: waiting for request");
-
- SyncRequest request;
- if (!ReadFdExactly(fd, &request, sizeof(request))) {
- SendSyncFail(fd, "command read failure");
- return false;
- }
- size_t path_length = request.path_length;
- if (path_length > 1024) {
- SendSyncFail(fd, "path too long");
- return false;
- }
- char name[1025];
- if (!ReadFdExactly(fd, name, path_length)) {
- SendSyncFail(fd, "filename read failure");
- return false;
- }
- name[path_length] = 0;
-
- std::string id_name = sync_id_to_name(request.id);
-
- D("sync: %s('%s')", id_name.c_str(), name);
- switch (request.id) {
- case ID_LSTAT_V1:
- if (!do_lstat_v1(fd, name)) return false;
- break;
- case ID_LSTAT_V2:
- case ID_STAT_V2:
- if (!do_stat_v2(fd, request.id, name)) return false;
- break;
- case ID_LIST_V1:
- if (!do_list_v1(fd, name)) return false;
- break;
- case ID_LIST_V2:
- if (!do_list_v2(fd, name)) return false;
- break;
- case ID_SEND_V1:
- if (!do_send_v1(fd, name, buffer)) return false;
- break;
- case ID_SEND_V2:
- if (!do_send_v2(fd, name, buffer)) return false;
- break;
- case ID_RECV_V1:
- if (!do_recv_v1(fd, name, buffer)) return false;
- break;
- case ID_RECV_V2:
- if (!do_recv_v2(fd, name, buffer)) return false;
- break;
- case ID_QUIT:
- return false;
- default:
- SendSyncFail(fd, StringPrintf("unknown command %08x", request.id));
- return false;
- }
-
- return true;
-}
-
-void file_sync_service(unique_fd fd) {
- std::vector<char> buffer(SYNC_DATA_MAX);
-
- while (handle_sync_command(fd.get(), buffer)) {
- }
-
- D("sync: done");
-}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-04 09:30:54 +0000