diff options
Diffstat (limited to 'libappfuse/include/libappfuse/AppFuse.h')
-rw-r--r-- | libappfuse/include/libappfuse/AppFuse.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/libappfuse/include/libappfuse/AppFuse.h b/libappfuse/include/libappfuse/AppFuse.h new file mode 100644 index 000000000..b6af48d78 --- /dev/null +++ b/libappfuse/include/libappfuse/AppFuse.h | |||
@@ -0,0 +1,76 @@ | |||
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 | #ifndef ANDROID_LIBAPPFUSE_APPFUSE_H_ | ||
18 | #define ANDROID_LIBAPPFUSE_APPFUSE_H_ | ||
19 | |||
20 | #include <linux/fuse.h> | ||
21 | |||
22 | namespace android { | ||
23 | |||
24 | // The numbers came from sdcard.c. | ||
25 | // Maximum number of bytes to write/read in one request/one reply. | ||
26 | constexpr size_t kFuseMaxWrite = 256 * 1024; | ||
27 | constexpr size_t kFuseMaxRead = 128 * 1024; | ||
28 | constexpr int32_t kFuseSuccess = 0; | ||
29 | |||
30 | template<typename T, typename Header> | ||
31 | struct FuseMessage { | ||
32 | Header header; | ||
33 | bool Read(int fd); | ||
34 | bool Write(int fd) const; | ||
35 | private: | ||
36 | bool CheckHeaderLength() const; | ||
37 | bool CheckResult(int result, const char* operation_name) const; | ||
38 | }; | ||
39 | |||
40 | struct FuseRequest : public FuseMessage<FuseRequest, fuse_in_header> { | ||
41 | union { | ||
42 | struct { | ||
43 | fuse_write_in write_in; | ||
44 | char write_data[kFuseMaxWrite]; | ||
45 | }; | ||
46 | fuse_open_in open_in; | ||
47 | fuse_init_in init_in; | ||
48 | fuse_read_in read_in; | ||
49 | char lookup_name[]; | ||
50 | }; | ||
51 | }; | ||
52 | |||
53 | struct FuseResponse : public FuseMessage<FuseResponse, fuse_out_header> { | ||
54 | union { | ||
55 | fuse_init_out init_out; | ||
56 | fuse_entry_out entry_out; | ||
57 | fuse_attr_out attr_out; | ||
58 | fuse_open_out open_out; | ||
59 | char read_data[kFuseMaxRead]; | ||
60 | fuse_write_out write_out; | ||
61 | }; | ||
62 | void Reset(uint32_t data_length, int32_t error, uint64_t unique); | ||
63 | void ResetHeader(uint32_t data_length, int32_t error, uint64_t unique); | ||
64 | }; | ||
65 | |||
66 | union FuseBuffer { | ||
67 | FuseRequest request; | ||
68 | FuseResponse response; | ||
69 | |||
70 | void HandleInit(); | ||
71 | void HandleNotImpl(); | ||
72 | }; | ||
73 | |||
74 | } // namespace android | ||
75 | |||
76 | #endif // ANDROID_LIBAPPFUSE_APPFUSE_H_ | ||