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      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 <ext4_utils/ext4_crypt.h>
     24 
     25 #include <vector>
     26 #include <string>
     27 
     28 #include <sys/mount.h>
     29 
     30 using android::base::StringPrintf;
     31 
     32 namespace android {
     33 namespace vold {
     34 namespace f2fs {
     35 
     36 static const char* kMkfsPath = "/system/bin/make_f2fs";
     37 static const char* kFsckPath = "/system/bin/fsck.f2fs";
     38 
     39 bool IsSupported() {
     40     return access(kMkfsPath, X_OK) == 0
     41             && access(kFsckPath, X_OK) == 0
     42             && IsFilesystemSupported("f2fs");
     43 }
     44 
     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, sFsckContext);
     53 }
     54 
     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 
     74 status_t Format(const std::string& source) {
     75     std::vector<std::string> cmd;
     76     cmd.push_back(kMkfsPath);
     77 
     78     cmd.push_back("-f");
     79     cmd.push_back("-d1");
     80 
     81     if (android::base::GetBoolProperty("vold.has_quota", false)) {
     82         cmd.push_back("-O");
     83         cmd.push_back("quota");
     84     }
     85     if (e4crypt_is_native()) {
     86         cmd.push_back("-O");
     87         cmd.push_back("encrypt");
     88     }
     89 
     90     cmd.push_back("-O");
     91     cmd.push_back("verity");
     92 
     93     cmd.push_back(source);
     94     return ForkExecvp(cmd);
     95 }
     96 
     97 }  // namespace f2fs
     98 }  // namespace vold
     99 }  // namespace android
    100