efifs - EFI File System Drivers

This is a GPLv3+ implementation of standalone EFI File System drivers, based on the GRUB 2.0 read-only drivers.

For additional info as well as precompiled drivers, see http://efi.akeo.ie

Requirements:
- gcc v4.7 or later
- Visual Studio 2013 or later
- QEMU for testing in Visual Studio
Compilation:
- [Common] Fetch the git submodules with git submodule init and git submodule update.
- [Visual Studio] Apply the included patch to the grub\ subdirectory.
- [Visual Studio] Open the solution file and hit F5 to compile and debug the default driver.
- [gcc] Run make in the top directory. This creates the gnu-efi and grub libraries.
- [gcc] Go to the src directory and run make or make install.
Testing:
The Visual Studio solution automatically sets QEMU up to run and will test the drivers (by also downloading a sample image for each target file system). For testing with gcc, make sure you have at least one disk with a target partition using the target filesystem, that is not being handled by other EFI filesystem drivers. Then boot into the EFI shell and run the following:
- load fs0:\<fs_name>_<arch>.efi or wherever your driver was copied
- map -r this should make a new fs# available, eg fs2:
- You should now be able to navigate and access content (in read-only mode)
- For logging output, set the FS_LOGGING shell variable to 1 or more
- To unload use the drivers command, then unload with the driver ID
Notes:
This is a pure GPLv3+ implementation of an EFI driver. Great care was taken not to use non GPLv3 compatible sources, such as rEFInd's fsw_efi (GPLv2 only) or Intel's FAT driver (requires an extra copyright notice).
Also note that the EDK2 files from the include directory use a BSD 2-Clause license, which is compatible with the GPL.

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