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| -rw-r--r-- | readme.rst | 2 | ||||
| -rw-r--r-- | tasks/20/readme | 39 |
2 files changed, 41 insertions, 0 deletions
@@ -50,3 +50,5 @@ Here are the links to each task's readme: 18. Handling Delayed Work: `task <https://git.bryanbrattlof.com/eudyptula-challenge/tree/tasks/18/readme>`__ 19. Networking Filters: `task <https://git.bryanbrattlof.com/eudyptula-challenge/tree/tasks/19/readme>`__ + +20. FAT ioctl: `task <https://git.bryanbrattlof.com/eudyptula-challenge/tree/tasks/20/readme>`__ diff --git a/tasks/20/readme b/tasks/20/readme new file mode 100644 index 0000000..bbc2e37 --- /dev/null +++ b/tasks/20/readme @@ -0,0 +1,39 @@ +Task 20 +======= + +Networking filters turned out to be not all that complex in the end, +great work with that. + +So, here's the final task. + +There might be other tasks that get created and sent out later on, but +the original challenge had 20 tasks, so after finishing this one, you +can consider yourself done! + +Let's try something a bit harder. Something that might cause some data +loss on a filesystem, always a fun thing to play with, if for no other +reason than to not be afraid of things like that in the future. + +This task requires you to work on the fat filesystem code: + + - Add an ioctl to modify the volume label of a mounted fat filesystem. + Be sure to handle both 16 and 32 bit fat filesystems {hint!} + + - Provide a userspace .c program to test this new ioctl. + +That's it! Seems so simple, right? I wonder why that option isn't in +the kernel tree already... + +Anyway, provide a patch to the kernel, and the .c file used to test the +new ioctl, as well as "proof" of this working. Make sure you don't run +into 32/64bit kernel issues with the ioctl, if you do things correctly, +you shouldn't have any problems. + +I recommend doing this work on either a loop-back fat filesystem on your +"normal" filesystem, or on a USB stick. Either will work just as well, +and make things easier to debug and test. + +Watch out for locking issues, as well as dirty filesystem state +problems. + +Best of luck! |