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      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 #ifndef __CORE_FS_MGR_PRIV_H
     18 #define __CORE_FS_MGR_PRIV_H
     19 
     20 #include <cutils/klog.h>
     21 #include <fs_mgr.h>
     22 
     23 __BEGIN_DECLS
     24 
     25 #define INFO(x...)    KLOG_INFO("fs_mgr", x)
     26 #define WARNING(x...) KLOG_WARNING("fs_mgr", x)
     27 #define ERROR(x...)   KLOG_ERROR("fs_mgr", x)
     28 
     29 #define CRYPTO_TMPFS_OPTIONS "size=256m,mode=0771,uid=1000,gid=1000"
     30 
     31 #define WAIT_TIMEOUT 20
     32 
     33 /* fstab has the following format:
     34  *
     35  * Any line starting with a # is a comment and ignored
     36  *
     37  * Any blank line is ignored
     38  *
     39  * All other lines must be in this format:
     40  *   <source>  <mount_point> <fs_type> <mount_flags> <fs_options> <fs_mgr_options>
     41  *
     42  *   <mount_flags> is a comma separated list of flags that can be passed to the
     43  *                 mount command.  The list includes noatime, nosuid, nodev, nodiratime,
     44  *                 ro, rw, remount, defaults.
     45  *
     46  *   <fs_options> is a comma separated list of options accepted by the filesystem being
     47  *                mounted.  It is passed directly to mount without being parsed
     48  *
     49  *   <fs_mgr_options> is a comma separated list of flags that control the operation of
     50  *                     the fs_mgr program.  The list includes "wait", which will wait till
     51  *                     the <source> file exists, and "check", which requests that the fs_mgr
     52  *                     run an fscheck program on the <source> before mounting the filesystem.
     53  *                     If check is specifed on a read-only filesystem, it is ignored.
     54  *                     Also, "encryptable" means that filesystem can be encrypted.
     55  *                     The "encryptable" flag _MUST_ be followed by a = and a string which
     56  *                     is the location of the encryption keys.  It can either be a path
     57  *                     to a file or partition which contains the keys, or the word "footer"
     58  *                     which means the keys are in the last 16 Kbytes of the partition
     59  *                     containing the filesystem.
     60  *
     61  * When the fs_mgr is requested to mount all filesystems, it will first mount all the
     62  * filesystems that do _NOT_ specify check (including filesystems that are read-only and
     63  * specify check, because check is ignored in that case) and then it will check and mount
     64  * filesystem marked with check.
     65  *
     66  */
     67 
     68 #define MF_WAIT         0x1
     69 #define MF_CHECK        0x2
     70 #define MF_CRYPT        0x4
     71 #define MF_NONREMOVABLE 0x8
     72 #define MF_VOLDMANAGED  0x10
     73 #define MF_LENGTH       0x20
     74 #define MF_RECOVERYONLY 0x40
     75 #define MF_SWAPPRIO     0x80
     76 #define MF_ZRAMSIZE     0x100
     77 #define MF_VERIFY       0x200
     78 #define MF_FORCECRYPT   0x400
     79 #define MF_NOEMULATEDSD 0x800 /* no emulated sdcard daemon, sd card is the only
     80                                  external storage */
     81 #define MF_NOTRIM       0x1000
     82 #define MF_FILEENCRYPTION 0x2000
     83 #define MF_FORMATTABLE  0x4000
     84 #define MF_SLOTSELECT   0x8000
     85 #define MF_FORCEFDEORFBE 0x10000
     86 #define MF_NOFAIL       0x40000
     87 
     88 #define DM_BUF_SIZE 4096
     89 
     90 int fs_mgr_set_blk_ro(const char *blockdev);
     91 int fs_mgr_update_for_slotselect(struct fstab *fstab);
     92 
     93 __END_DECLS
     94 
     95 #endif /* __CORE_FS_MGR_PRIV_H */
     96