1 /*
2 * Copyright (C) 2015 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 "F2fs.h"
18 #include "Utils.h"
19
20 #include <base/logging.h>
21 #include <base/stringprintf.h>
22
23 #include <vector>
24 #include <string>
25
26 #include <sys/mount.h>
27
28 using android::base::StringPrintf;
29
30 namespace android {
31 namespace vold {
32 namespace f2fs {
33
34 static const char* kMkfsPath = "/system/bin/make_f2fs";
35 static const char* kFsckPath = "/system/bin/fsck.f2fs";
36
IsSupported()37 bool IsSupported() {
38 return access(kMkfsPath, X_OK) == 0
39 && access(kFsckPath, X_OK) == 0
40 && IsFilesystemSupported("f2fs");
41 }
42
Check(const std::string & source)43 status_t Check(const std::string& source) {
44 std::vector<std::string> cmd;
45 cmd.push_back(kFsckPath);
46 cmd.push_back("-f");
47 cmd.push_back(source);
48
49 // f2fs devices are currently always trusted
50 return ForkExecvp(cmd, sFsckContext);
51 }
52
Mount(const std::string & source,const std::string & target)53 status_t Mount(const std::string& source, const std::string& target) {
54 const char* c_source = source.c_str();
55 const char* c_target = target.c_str();
56 unsigned long flags = MS_NOATIME | MS_NODEV | MS_NOSUID | MS_DIRSYNC;
57
58 int res = mount(c_source, c_target, "f2fs", flags, NULL);
59 if (res != 0) {
60 PLOG(ERROR) << "Failed to mount " << source;
61 if (errno == EROFS) {
62 res = mount(c_source, c_target, "f2fs", flags | MS_RDONLY, NULL);
63 if (res != 0) {
64 PLOG(ERROR) << "Failed to mount read-only " << source;
65 }
66 }
67 }
68
69 return res;
70 }
71
Format(const std::string & source)72 status_t Format(const std::string& source) {
73 std::vector<std::string> cmd;
74 cmd.push_back(kMkfsPath);
75 cmd.push_back(source);
76
77 return ForkExecvp(cmd);
78 }
79
80 } // namespace f2fs
81 } // namespace vold
82 } // namespace android
83