1 /*
2 * Copyright (c) 2021-2025 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #include "posix_fallocate.h"
16
17 #include <cstring>
18 #include <fcntl.h>
19 #include <tuple>
20 #include <unistd.h>
21
22 #include "n_async_work_callback.h"
23 #include "n_async_work_promise.h"
24 #include "n_func_arg.h"
25
26 namespace OHOS {
27 namespace DistributedFS {
28 namespace ModuleFileIO {
29 using namespace std;
30
GetPosixFallocateArg(napi_env env,const NFuncArg & funcArg)31 static tuple<bool, int, int, int> GetPosixFallocateArg(napi_env env, const NFuncArg &funcArg)
32 {
33 auto [resGetFirstArg, fd] = NVal(env, funcArg[NARG_POS::FIRST]).ToInt32();
34 if (!resGetFirstArg) {
35 UniError(EINVAL).ThrowErr(env, "Invalid fd");
36 return { false, -1, -1, -1 };
37 }
38
39 auto [resGetSecondArg, offset] = NVal(env, funcArg[NARG_POS::SECOND]).ToInt32();
40 if (!resGetSecondArg) {
41 UniError(EINVAL).ThrowErr(env, "Invalid offset");
42 return { false, -1, -1, -1 };
43 }
44
45 auto [resGetThirdArg, len] = NVal(env, funcArg[NARG_POS::THIRD]).ToInt32();
46 if (!resGetThirdArg) {
47 UniError(EINVAL).ThrowErr(env, "Invalid len");
48 return { false, -1, -1, -1 };
49 }
50
51 return { true, fd, offset, len };
52 }
53
Sync(napi_env env,napi_callback_info info)54 napi_value PosixFallocate::Sync(napi_env env, napi_callback_info info)
55 {
56 NFuncArg funcArg(env, info);
57 if (!funcArg.InitArgs(NARG_CNT::THREE)) {
58 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
59 return nullptr;
60 }
61
62 auto [resGetPosixFallocateArg, fd, offset, len] = GetPosixFallocateArg(env, funcArg);
63 if (!resGetPosixFallocateArg) {
64 return nullptr;
65 }
66
67 int ret = posix_fallocate(fd, offset, len);
68 if (ret == -1) {
69 UniError(errno).ThrowErr(env);
70 return nullptr;
71 }
72
73 return NVal::CreateUndefined(env).val_;
74 }
75
Async(napi_env env,napi_callback_info info)76 napi_value PosixFallocate::Async(napi_env env, napi_callback_info info)
77 {
78 NFuncArg funcArg(env, info);
79 if (!funcArg.InitArgs(NARG_CNT::THREE, NARG_CNT::FOUR)) {
80 UniError(EINVAL).ThrowErr(env, "Number of arguments unmatched");
81 return nullptr;
82 }
83
84 auto [resGetPosixFallocateArg, fd, offset, len] = GetPosixFallocateArg(env, funcArg);
85 if (!resGetPosixFallocateArg) {
86 return nullptr;
87 }
88
89 auto cbExec = [fd = fd, offset = offset, len = len](napi_env env) -> UniError {
90 if (posix_fallocate(fd, offset, len) == -1) {
91 return UniError(errno);
92 } else {
93 return UniError(ERRNO_NOERR);
94 }
95 };
96
97 auto cbCompl = [](napi_env env, UniError err) -> NVal {
98 if (err) {
99 return { env, err.GetNapiErr(env) };
100 }
101 return { NVal::CreateUndefined(env) };
102 };
103
104 NVal thisVar(env, funcArg.GetThisVar());
105 const string procedureName = "fileioPosixFallocate";
106 size_t argc = funcArg.GetArgc();
107 if (argc == NARG_CNT::THREE) {
108 return NAsyncWorkPromise(env, thisVar).Schedule(procedureName, cbExec, cbCompl).val_;
109 } else {
110 NVal cb(env, funcArg[NARG_POS::FOURTH]);
111 return NAsyncWorkCallback(env, thisVar, cb).Schedule(procedureName, cbExec, cbCompl).val_;
112 }
113
114 return NVal::CreateUndefined(env).val_;
115 }
116 } // namespace ModuleFileIO
117 } // namespace DistributedFS
118 } // namespace OHOS