22 Jun



GSoC NTFS 2017 Update 2

All is going well :). Since the last update, I've checked off a minor TODO related to file creation: increasing the size of the master file table, if needed.

Every time the mft grows, it creates several empty file records at a time. In the past, I was using this to my advantage, and was only creating files in empty slots that already existed. Every time I got an error saying there wasn't enough space for a new file, I'd boot into Windows, create a file (which would increase the mft size), and get back to testing.

It was appropriate to put off enlarging the mft at first, but such a limitation couldn't last forever. I picked last week to tackle it.

Development of this feature was pretty uneventful. It took a little longer than I thought it would, but even so, I feel like I've improved a LOT since this time last year. I'd say I have a pretty good grasp of how our driver works now, and how NTFS works too. Even the nitty-gritty details (well, most of them anyway).

Last year, I had to take on little pieces of the puzzle so I'd have some hope of understanding what I was working with. At this point, though, I can actually see the big picture. Or so it seems. :P

Another thing that's improved a lot since last year is the NTFS driver itself. I know, I'm totally blowing my own horn here, but it's so cool! When I first started, I had to write a test program just to prove my changes were doing anything, because those changes were so small that any other method - like saving the file in notepad - would fail.

In contrast, the other day I was using a plain old batch file running right off the drive to test file creation. The batch file that I made in Windows had a minor syntax error in ROS, so I opened it up, changed it, saved it and re-ran it. A few seconds after the test was running, I realized how awesome it was that I could do that operation and totally take for granted that it worked!

This blog post represents the personal opinion of the author and is not representative of the position of the ReactOS Project.

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