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Implement a pipe between TWRP and MTP to allow TWRP to tell MTP
to remove storage partitions as they become unavailable (e.g.
during a wipe, unmount, etc) instead of disabling MTP completely.
This includes some fixes and improvements in destructors to
properly remove / delete various items. This also means that we
will not be toggling adb off and on quite as often.

I do not like that we had to add another thread, but we were
unable to use select() on the mtp_usb character device because
this device does not support polling. Select always returned
indicating that the mtp file descriptor was ready to be read and
the resulting read would block. The read block prevented us from
being able to include reading of the pipe between TWRP and MTP in
the main MTP thread.

We might want to add a return pipe letting TWRP know if the
removal of the storage device was successful, but I am not sure
how we want to implement this. It would invovle timeouts in both
TWRP and MTP to ensure that we returned a failure indicator in a
timely manner to TWRP and prevent deleting the storage device in
the case of a failure. Right now we make no attempt to ensure that
an MTP operation is underway like a large file transfer, but we
were not doing anything like this in the past. In some respects we
have limited control over what happens. If the user installs a
zip that unmounts a storage partition, we will not know about the
change in storage status anyway. Regular Android does not have
these troubles because partitions rarely get unmounted like in
recovery. At some point, we have to hold the user accountable for
performing actions that may remove a storage partition while they
are using MTP anyway.

Ideally we do not want to toggle the USB IDs and thus toggle adb
off and on during early boot, but I am not sure what the best way
to handle that at this time.

Change-Id: I9343e5396bf6023d3b994de1bf01ed91d129bc14

Change-Id: If8114b5eac741db6c512fb35cb48e3825c2ff098

Trim cryptfs.c to remove functions that TWRP does not use for
decrypt and remove the need for libfs_mgr from cryptfs.c by
passing some items to cryptfs.c from the partition manager.

Add support for new fstab flags:
encryptable and forceencrypt=/path/to/cryptokey
For example:
flags=forceencrypt=/dev/block/platform/sdhci-tegra.3/by-name/MD1
Note that "footer" is the default, so you do not need to set this
flag on devices that use the footer for the crypto key.
Also add mounttodecrypt if you need to mount a partition during
the decrypt cycle for firmware of proprietary libs.

Clean up decrypt and only support one version

Android 5.0 lollipop decrypt should be backwards compatible with
older versions so we will only support one version, 1.3 that came
with 5.0 lollipop.

Remove support for Samsung TouchWiz decrypt. It does not work with
the latest versions of Samsung encryption anyway and it has not
been updated to work with any AOSP decryption higher than 1.1

Change-Id: I2d9c6e31df50268c91ee642c2fa090f901d9d5c9

Change-Id: Ia6eefd23f6671428221e35642f01534bc9fff6ad

- use std::map instead of linked list
- read directories on demand
- fix writing zip files to storage root
- fix creating directories
- lots of minor fixes
- simplify generation of storage IDs and make them spec compliant

Change-Id: I2137c27549ddbdc58466f2e3aeda464fac70a3c5

Change-Id: Ia3007fbced9ce3bc94efdb3dacc582a5e68a49a4

Change-Id: I9fcd7e0169fbdd52405c0c86aafbef091f69411e

Change-Id: I95cf6f4def0c86f40c775738f0712323f0a0f146

Big thanks to Dees_Troy for helping with the implementation.

Change-Id: I6c9c522b9c9de5dc139e2ecb0141008182ba07f0

Track backup and restore progress based on the sizes of the files
as they are being added to the tar backup file. Update the
progress bar based on the sizes of the files.

Change-Id: Idf649efa1db3e91830b4b2add86203a3f30042ff

Change-Id: I9043e98e1e1ed4722f05c13a60b43d2d0bf739f6

Change-Id: Ia5957efe616defa4272501cd8f31d26d394077bb
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>

Some devices (jewel, m8) have .android_secure at a non-standard
location. Allow a different partition to be specified as the home of
.android_secure using the fstab flag 'andsec'.

Using the /data/media variant of jewel as an example, recovery.fstab or
twrp.fstab could be edited like follows:

/external_sd  vfat  /dev/block/mmcblk1p1  flags=display="MicroSD";andsec

Note, this is NOT a method to move .android_secure in your ROM. Your ROM
must already write to this alternative location.

Change-Id: I3a6e4e63aaddb35870b79e80938b0f9c2c902443

Change-Id: I5743d9b967a8227c4bb87da01a9c67c574bf9876

Change-Id: I8af92543c2f0c201e7220267c417d74e4561038d

Create a TWRP Disk Usage Class to retain state about a directory and whether we should skip it in other classes like twrpTar.
Moved Get_Folder_Size to this new class.

Change-Id: If0a0220f900eb109581f2eeaf7b76e3f7d6886f1

example userdata line (as needed by MotoX):
/data         f2fs      /dev/block/platform/msm_sdcc.1/by-name/userdata       flags=fsflags="inline_xattr"

Code for parsing flags/options originally based on AOSP fs_mgr sources.

Change-Id: I5fb2b5d5cdd08137e6bf71f0085a3f8aebd889a8

Change-Id: I3be70a89

Change-Id: I58f4a8cedf31e6b6efd88f96a43ed525603ae311

Need to add this to your source tree:
https://github.com/razrqcom-dev-team/android_external_f2fs-tools

Change-Id: I3ee9ebbb617259655518f8ea356ce7b8c246cd4d

* Remove useless 'virtual' keyword
* Set proper members visibility
Signed-off-by: Vojtech Bocek <vbocek@gmail.com>

Also copy recovery.fstab to cache and create a storage.fstab in
cache for app/apk use.

Also includes features merged from:

Update twrpTar by kokotas

Revised function entryExists().
Added function to get archive's uncompressed size.
Added option to exclude item(s) from the archive.
Revised forks()

http://review.teamw.in/#/c/590/

Change-Id: I01fa2c81643161984eff2625247af75990684bd9

Add partition list GUI element and update backup, restore, mount,
storage selection, and wipe sections of GUI and partition manager
code to reflect the new GUI element. Update ORS engine to handle
new backup and restore setup.

Fix a bug with decrypt.
Add 1080x1920 layout.

Change-Id: Iaa2f44cb707167e66f935452f076ba00e68a2aa4

Needed on Sony mint (Xperia T) as the /data/media folder is a
separate partition and normal data media wiping is not appropriate
for this device but the layout version file needs to be retained
for Android 4.2 multi-user.

Add proper mkdosfs tool
Add fuse to TWRP
Add experimental exfat-fuse to TWRP
Convert all system() functions to use new Exec_Cmd function

Change-Id: I8f2b5b68a8c3ede74858d53002efab997174ee65

Change-Id: Ie44958a148d00cadd2ba3c51255f7fd9d8a651e7

Also redirect stderr output on terminal commands for display in
GUI console

Also improve handling of MTD names

Converted bootloader.cpp to TWRP and removed AOSP fstab parsing
from startup