1 /*
2 * Copyright (C) 2012 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 <stdio.h>
18 #include <stdlib.h>
19 #include <fcntl.h>
20 #include <unistd.h>
21 #include <errno.h>
22 #include <string.h>
23 #include <dirent.h>
24 #include <errno.h>
25 #include <fcntl.h>
26
27 #include <sys/types.h>
28 #include <sys/stat.h>
29 #include <sys/types.h>
30 #include <sys/mman.h>
31 #include <sys/mount.h>
32 #include <sys/wait.h>
33
34 #include <linux/kdev_t.h>
35
36 #define LOG_TAG "Vold"
37
38 #include <cutils/log.h>
39 #include <cutils/properties.h>
40
41 #include <logwrap/logwrap.h>
42
43 #include "Ext4.h"
44 #include "VoldUtil.h"
45
46 #define MKEXT4FS_PATH "/system/bin/make_ext4fs";
47
doMount(const char * fsPath,const char * mountPoint,bool ro,bool remount,bool executable)48 int Ext4::doMount(const char *fsPath, const char *mountPoint, bool ro, bool remount,
49 bool executable) {
50 int rc;
51 unsigned long flags;
52
53 flags = MS_NOATIME | MS_NODEV | MS_NOSUID | MS_DIRSYNC;
54
55 flags |= (executable ? 0 : MS_NOEXEC);
56 flags |= (ro ? MS_RDONLY : 0);
57 flags |= (remount ? MS_REMOUNT : 0);
58
59 rc = mount(fsPath, mountPoint, "ext4", flags, NULL);
60
61 if (rc && errno == EROFS) {
62 SLOGE("%s appears to be a read only filesystem - retrying mount RO", fsPath);
63 flags |= MS_RDONLY;
64 rc = mount(fsPath, mountPoint, "ext4", flags, NULL);
65 }
66
67 return rc;
68 }
69
format(const char * fsPath,const char * mountpoint)70 int Ext4::format(const char *fsPath, const char *mountpoint) {
71 int fd;
72 const char *args[5];
73 int rc;
74 int status;
75
76 args[0] = MKEXT4FS_PATH;
77 args[1] = "-J";
78 args[2] = "-a";
79 args[3] = mountpoint;
80 args[4] = fsPath;
81 rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false,
82 true);
83 if (rc != 0) {
84 SLOGE("Filesystem (ext4) format failed due to logwrap error");
85 errno = EIO;
86 return -1;
87 }
88
89 if (!WIFEXITED(status)) {
90 SLOGE("Filesystem (ext4) format did not exit properly");
91 errno = EIO;
92 return -1;
93 }
94
95 status = WEXITSTATUS(status);
96
97 if (status == 0) {
98 SLOGI("Filesystem (ext4) formatted OK");
99 return 0;
100 } else {
101 SLOGE("Format (ext4) failed (unknown exit code %d)", status);
102 errno = EIO;
103 return -1;
104 }
105 return 0;
106 }
107