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A friend and I are thinking about creating a simple file system for learning purposes. We're going to write it in C/C++, and try to get it to a mountable state from within linux. We've both been coding or over 16 years (32 combined), so I suppose its just a matter of finding some documentation, and a ton of learning.
My question is, where could I find out more information? (Documentation for creating a file system, requirements of mounting a file system in linux, etc)
Where do we start?
Edit: I should also mention, this would not be a boot-able file system, just a file system used for storage, though I am not too sure if that matters or not.
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Mounting a file system creates a binding for the duration of the mount. The binding is between a directory that is already in the file system hierarchy, called the mount point , and the entry point into the file system about to be mounted, called the root of this file system.
mount command is used to mount the filesystem found on a device to big tree structure(Linux filesystem) rooted at '/'. Conversely, another command umount can be used to detach these devices from the Tree. These commands tells the Kernel to attach the filesystem found at device to the dir.
In most time, the no mountable file system mac error occurs because of the corrupted DMG file that is caused by wrong operations during the download process. If so, you can download the file again with all the download assistant plug-ins off.
I don't have much experience with this, but FUSE ("Filesystem in Userspace") seems to be the way to go - see http://fuse.sourceforge.net, http://en.wikipedia.org/wiki/Filesystem_in_Userspace
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