1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <stdlib.h> 18 #include <stdio.h> 19 #include <errno.h> 20 21 #include "adb.h" 22 #include "fuse_sideload.h" 23 24 struct adb_data { 25 int sfd; // file descriptor for the adb channel 26 27 uint64_t file_size; 28 uint32_t block_size; 29 }; 30 31 static int read_block_adb(void* cookie, uint32_t block, uint8_t* buffer, uint32_t fetch_size) { 32 struct adb_data* ad = (struct adb_data*)cookie; 33 34 char buf[10]; 35 snprintf(buf, sizeof(buf), "%08u", block); 36 if (writex(ad->sfd, buf, 8) < 0) { 37 fprintf(stderr, "failed to write to adb host: %s\n", strerror(errno)); 38 return -EIO; 39 } 40 41 if (readx(ad->sfd, buffer, fetch_size) < 0) { 42 fprintf(stderr, "failed to read from adb host: %s\n", strerror(errno)); 43 return -EIO; 44 } 45 46 return 0; 47 } 48 49 static void close_adb(void* cookie) { 50 struct adb_data* ad = (struct adb_data*)cookie; 51 52 writex(ad->sfd, "DONEDONE", 8); 53 } 54 55 int run_adb_fuse(int sfd, uint64_t file_size, uint32_t block_size) { 56 struct adb_data ad; 57 struct provider_vtab vtab; 58 59 ad.sfd = sfd; 60 ad.file_size = file_size; 61 ad.block_size = block_size; 62 63 vtab.read_block = read_block_adb; 64 vtab.close = close_adb; 65 66 return run_fuse_sideload(&vtab, &ad, file_size, block_size); 67 } 68
