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 <android-base/logging.h>
21 #include <android-base/properties.h>
22 #include <android-base/stringprintf.h>
23 #include <logwrap/logwrap.h>
24 #include <fscrypt/fscrypt.h>
25
26 #include <string>
27 #include <vector>
28
29 #include <sys/mount.h>
30
31 using android::base::StringPrintf;
32
33 namespace android {
34 namespace vold {
35 namespace f2fs {
36
37 static const char* kMkfsPath = "/system/bin/make_f2fs";
38 static const char* kFsckPath = "/system/bin/fsck.f2fs";
39
IsSupported()40 bool IsSupported() {
41 return access(kMkfsPath, X_OK) == 0 && access(kFsckPath, X_OK) == 0 &&
42 IsFilesystemSupported("f2fs");
43 }
44
Check(const std::string & source)45 status_t Check(const std::string& source) {
46 std::vector<std::string> cmd;
47 cmd.push_back(kFsckPath);
48 cmd.push_back("-a");
49 cmd.push_back(source);
50
51 // f2fs devices are currently always trusted
52 return ForkExecvp(cmd, nullptr, sFsckContext);
53 }
54
Mount(const std::string & source,const std::string & target)55 status_t Mount(const std::string& source, const std::string& target) {
56 const char* c_source = source.c_str();
57 const char* c_target = target.c_str();
58 unsigned long flags = MS_NOATIME | MS_NODEV | MS_NOSUID | MS_DIRSYNC;
59
60 int res = mount(c_source, c_target, "f2fs", flags, NULL);
61 if (res != 0) {
62 PLOG(ERROR) << "Failed to mount " << source;
63 if (errno == EROFS) {
64 res = mount(c_source, c_target, "f2fs", flags | MS_RDONLY, NULL);
65 if (res != 0) {
66 PLOG(ERROR) << "Failed to mount read-only " << source;
67 }
68 }
69 }
70
71 return res;
72 }
73
Format(const std::string & source)74 status_t Format(const std::string& source) {
75 std::vector<char const*> cmd;
76 cmd.emplace_back(kMkfsPath);
77
78 cmd.emplace_back("-f");
79 cmd.emplace_back("-d1");
80
81 if (android::base::GetBoolProperty("vold.has_quota", false)) {
82 cmd.emplace_back("-O");
83 cmd.emplace_back("quota");
84 }
85 if (fscrypt_is_native()) {
86 cmd.emplace_back("-O");
87 cmd.emplace_back("encrypt");
88 }
89 if (android::base::GetBoolProperty("vold.has_compress", false)) {
90 cmd.emplace_back("-O");
91 cmd.emplace_back("compression");
92 cmd.emplace_back("-O");
93 cmd.emplace_back("extra_attr");
94 }
95 cmd.emplace_back("-O");
96 cmd.emplace_back("verity");
97
98 const bool needs_casefold =
99 android::base::GetBoolProperty("external_storage.casefold.enabled", false);
100 const bool needs_projid =
101 android::base::GetBoolProperty("external_storage.projid.enabled", false);
102 if (needs_projid) {
103 cmd.emplace_back("-O");
104 cmd.emplace_back("project_quota,extra_attr");
105 }
106 if (needs_casefold) {
107 cmd.emplace_back("-O");
108 cmd.emplace_back("casefold");
109 cmd.emplace_back("-C");
110 cmd.emplace_back("utf8");
111 }
112 cmd.emplace_back(source.c_str());
113 return logwrap_fork_execvp(cmd.size(), cmd.data(), nullptr, false, LOG_KLOG,
114 false, nullptr);
115 }
116
117 } // namespace f2fs
118 } // namespace vold
119 } // namespace android
120