| Daichi Hirono | c613476 | 2016-10-27 14:57:55 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 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 specic language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "libappfuse/FuseBridgeLoop.h" |
| 18 | |
| 19 | #include <android-base/logging.h> |
| 20 | #include <android-base/unique_fd.h> |
| 21 | |
| 22 | namespace android { |
| 23 | |
| 24 | bool FuseBridgeLoop::Start( |
| 25 | int raw_dev_fd, int raw_proxy_fd, FuseBridgeLoop::Callback* callback) { |
| 26 | base::unique_fd dev_fd(raw_dev_fd); |
| 27 | base::unique_fd proxy_fd(raw_proxy_fd); |
| 28 | |
| 29 | LOG(DEBUG) << "Start fuse loop."; |
| 30 | while (true) { |
| 31 | if (!buffer_.request.Read(dev_fd)) { |
| 32 | return false; |
| 33 | } |
| 34 | |
| 35 | const uint32_t opcode = buffer_.request.header.opcode; |
| 36 | LOG(VERBOSE) << "Read a fuse packet, opcode=" << opcode; |
| 37 | switch (opcode) { |
| 38 | case FUSE_FORGET: |
| 39 | // Do not reply to FUSE_FORGET. |
| 40 | continue; |
| 41 | |
| 42 | case FUSE_LOOKUP: |
| 43 | case FUSE_GETATTR: |
| 44 | case FUSE_OPEN: |
| 45 | case FUSE_READ: |
| 46 | case FUSE_WRITE: |
| 47 | case FUSE_RELEASE: |
| 48 | case FUSE_FLUSH: |
| 49 | if (!buffer_.request.Write(proxy_fd)) { |
| 50 | LOG(ERROR) << "Failed to write a request to the proxy."; |
| 51 | return false; |
| 52 | } |
| 53 | if (!buffer_.response.Read(proxy_fd)) { |
| 54 | LOG(ERROR) << "Failed to read a response from the proxy."; |
| 55 | return false; |
| 56 | } |
| 57 | break; |
| 58 | |
| 59 | case FUSE_INIT: |
| 60 | buffer_.HandleInit(); |
| 61 | break; |
| 62 | |
| 63 | default: |
| 64 | buffer_.HandleNotImpl(); |
| 65 | break; |
| 66 | } |
| 67 | |
| 68 | if (!buffer_.response.Write(dev_fd)) { |
| 69 | LOG(ERROR) << "Failed to write a response to the device."; |
| 70 | return false; |
| 71 | } |
| 72 | |
| 73 | if (opcode == FUSE_INIT) { |
| 74 | callback->OnMount(); |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | } // namespace android |