blob: f5a964a2eacf03f0c6eae2a2fc827d43020da920 [file] [log] [blame]
Kenny Root344ca102012-04-03 17:23:01 -07001/*
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>
Rom Lemarchand2ba45aa2013-01-16 12:29:28 -080032#include <sys/wait.h>
Kenny Root344ca102012-04-03 17:23:01 -070033
34#include <linux/kdev_t.h>
Kenny Root344ca102012-04-03 17:23:01 -070035
36#define LOG_TAG "Vold"
37
38#include <cutils/log.h>
39#include <cutils/properties.h>
40
Rom Lemarchand2ba45aa2013-01-16 12:29:28 -080041#include <logwrap/logwrap.h>
42
Kenny Root344ca102012-04-03 17:23:01 -070043#include "Ext4.h"
Rom Lemarchand5593c852012-12-21 12:41:43 -080044#include "VoldUtil.h"
Kenny Root344ca102012-04-03 17:23:01 -070045
Daniel Rosenbergfcd34a02014-05-22 11:23:56 -070046#define MKEXT4FS_PATH "/system/bin/make_ext4fs"
47#define RESIZE2FS_PATH "/system/bin/resize2fs"
Kenny Root344ca102012-04-03 17:23:01 -070048
Kenny Root344ca102012-04-03 17:23:01 -070049int Ext4::doMount(const char *fsPath, const char *mountPoint, bool ro, bool remount,
50 bool executable) {
51 int rc;
52 unsigned long flags;
53
54 flags = MS_NOATIME | MS_NODEV | MS_NOSUID | MS_DIRSYNC;
55
56 flags |= (executable ? 0 : MS_NOEXEC);
57 flags |= (ro ? MS_RDONLY : 0);
58 flags |= (remount ? MS_REMOUNT : 0);
59
60 rc = mount(fsPath, mountPoint, "ext4", flags, NULL);
61
62 if (rc && errno == EROFS) {
63 SLOGE("%s appears to be a read only filesystem - retrying mount RO", fsPath);
64 flags |= MS_RDONLY;
65 rc = mount(fsPath, mountPoint, "ext4", flags, NULL);
66 }
67
68 return rc;
69}
70
Daniel Rosenbergfcd34a02014-05-22 11:23:56 -070071int Ext4::resize(const char *fspath, unsigned int numSectors) {
72 const char *args[4];
73 char* size_str;
74 int rc;
75 int status;
76
77 args[0] = RESIZE2FS_PATH;
78 args[1] = "-f";
79 args[2] = fspath;
80 if (asprintf(&size_str, "%ds", numSectors) < 0)
81 {
82 SLOGE("Filesystem (ext4) resize failed to set size");
83 return -1;
84 }
85 args[3] = size_str;
86 rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false,
87 true);
88 free(size_str);
89 if (rc != 0) {
90 SLOGE("Filesystem (ext4) resize failed due to logwrap error");
91 errno = EIO;
92 return -1;
93 }
94
95 if (!WIFEXITED(status)) {
96 SLOGE("Filesystem (ext4) resize did not exit properly");
97 errno = EIO;
98 return -1;
99 }
100
101 status = WEXITSTATUS(status);
102
103 if (status == 0) {
104 SLOGI("Filesystem (ext4) resized OK");
105 return 0;
106 } else {
107 SLOGE("Resize (ext4) failed (unknown exit code %d)", status);
108 errno = EIO;
109 return -1;
110 }
111 return 0;
112}
113
Daniel Rosenberg6a74dca2014-05-23 13:47:00 -0700114int Ext4::format(const char *fsPath, unsigned int numSectors, const char *mountpoint) {
Daniel Rosenberg6a74dca2014-05-23 13:47:00 -0700115 const char *args[7];
Kenny Root344ca102012-04-03 17:23:01 -0700116 int rc;
Rom Lemarchand2ba45aa2013-01-16 12:29:28 -0800117 int status;
Kenny Root344ca102012-04-03 17:23:01 -0700118
119 args[0] = MKEXT4FS_PATH;
120 args[1] = "-J";
rpcraiga54e13a2012-09-21 14:17:08 -0400121 args[2] = "-a";
122 args[3] = mountpoint;
Daniel Rosenberg6a74dca2014-05-23 13:47:00 -0700123 if (numSectors) {
124 char tmp[32];
125 snprintf(tmp, sizeof(tmp), "%u", numSectors * 512);
126 const char *size = tmp;
127 args[4] = "-l";
128 args[5] = size;
129 args[6] = fsPath;
130 rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false, true);
131 } else {
132 args[4] = fsPath;
133 rc = android_fork_execvp(5, (char **)args, &status, false, true);
134 }
Rom Lemarchand2ba45aa2013-01-16 12:29:28 -0800135 rc = android_fork_execvp(ARRAY_SIZE(args), (char **)args, &status, false,
136 true);
137 if (rc != 0) {
138 SLOGE("Filesystem (ext4) format failed due to logwrap error");
139 errno = EIO;
140 return -1;
141 }
Kenny Root344ca102012-04-03 17:23:01 -0700142
Rom Lemarchand2ba45aa2013-01-16 12:29:28 -0800143 if (!WIFEXITED(status)) {
144 SLOGE("Filesystem (ext4) format did not exit properly");
145 errno = EIO;
146 return -1;
147 }
148
149 status = WEXITSTATUS(status);
150
151 if (status == 0) {
Kenny Root344ca102012-04-03 17:23:01 -0700152 SLOGI("Filesystem (ext4) formatted OK");
153 return 0;
154 } else {
Rom Lemarchand2ba45aa2013-01-16 12:29:28 -0800155 SLOGE("Format (ext4) failed (unknown exit code %d)", status);
Kenny Root344ca102012-04-03 17:23:01 -0700156 errno = EIO;
157 return -1;
158 }
159 return 0;
160}