file_sync_service.h

/*
 * 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.
 */

#ifndef _FILE_SYNC_SERVICE_H_
#define _FILE_SYNC_SERVICE_H_

#include <string>
#include <vector>

#define MKID(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((d) << 24))

#define ID_LSTAT_V1 MKID('S','T','A','T')
#define ID_STAT_V2 MKID('S','T','A','2')
#define ID_LSTAT_V2 MKID('L','S','T','2')
#define ID_LIST MKID('L','I','S','T')
#define ID_SEND MKID('S','E','N','D')
#define ID_RECV MKID('R','E','C','V')
#define ID_DENT MKID('D','E','N','T')
#define ID_DONE MKID('D','O','N','E')
#define ID_DATA MKID('D','A','T','A')
#define ID_OKAY MKID('O','K','A','Y')
#define ID_FAIL MKID('F','A','I','L')
#define ID_QUIT MKID('Q','U','I','T')

struct SyncRequest {
    uint32_t id;  // ID_STAT, et cetera.
    uint32_t path_length;  // <= 1024
    // Followed by 'path_length' bytes of path (not NUL-terminated).
} __attribute__((packed)) ;

union syncmsg {
    struct __attribute__((packed)) {
        uint32_t id;
        uint32_t mode;
        uint32_t size;
        uint32_t time;
    } stat_v1;
    struct __attribute__((packed)) {
        uint32_t id;
        uint32_t error;
        uint64_t dev;
        uint64_t ino;
        uint32_t mode;
        uint32_t nlink;
        uint32_t uid;
        uint32_t gid;
        uint64_t size;
        int64_t atime;
        int64_t mtime;
        int64_t ctime;
    } stat_v2;
    struct __attribute__((packed)) {
        uint32_t id;
        uint32_t mode;
        uint32_t size;
        uint32_t time;
        uint32_t namelen;
    } dent;
    struct __attribute__((packed)) {
        uint32_t id;
        uint32_t size;
    } data;
    struct __attribute__((packed)) {
        uint32_t id;
        uint32_t msglen;
    } status;
};

void file_sync_service(int fd, void* cookie);
bool do_sync_ls(const char* path);
bool do_sync_push(const std::vector<const char*>& srcs, const char* dst, bool sync);
bool do_sync_pull(const std::vector<const char*>& srcs, const char* dst,
                  bool copy_attrs, const char* name=nullptr);

bool do_sync_sync(const std::string& lpath, const std::string& rpath, bool list_only);

#define SYNC_DATA_MAX (64*1024)

#endif