Online implementation of evfs interface.
Paper link: https://www.usenix.org/system/files/conference/hotstorage18/hotstorage18-paper-sun.pdf
Clone the repository with the following command:
git clone --depth 1 --single-branch --branch main git@github.com:jacksun007/evfs-linux.git
The above will make sure you only clone our active branch. Otherwise it may take a very long time cloning the entire history of Linux.
Next, run make menuconfig to set up the kernel build. You will need to
make F2FS "included" (it is modularized by default). You can do this by
going under File Systems, select F2FS and press "Y". You should see the
option go from <M> to <*>. It may be helpful to add a local release name. My personal choice is "-evfs".
Then, compile the kernel. You may want to use as many CPUs as you have available to expedite the build. e.g.,
make -j 4 && make -j 4 modules
Assuming the build was successful. Install the modules and the kernel.
sudo make modules_install
sudo make install
Reboot and run the kernel that you just built. Run uname -r to make sure you are now running the kernel with evfs support.
include/uapi/linux/evfs.h - where all common evfs structures and ioctl
commands are defined
apps - contains user level evfs applications
fs - contains generic vfs implementation
fs/ext4 - contains ext4 implementation
fs/f2fs - contains f2fs implementation
- Application Level File System Interface: https://www.gnu.org/software/libc/manual/html_node/File-System-Interface.html
- Overview of the Linux Virtual File System: https://www.kernel.org/doc/html/latest/filesystems/vfs.html