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SubjectRe: Oops with ext3 journaling
On Sat, 4 Dec 1999, Daniel Veillard wrote:

> Let me guess, did your copy command avoided overwriting the journal.dat ?
> If not it's not surprizing, that's the only way (with soft raid + ext3)
> I found to get an oops from ext3.

(Sound of head banging against wall... ouch!) Yep, that would do it, I
should have done an --exclude journal.dat...

> I reiterate, the ext3 code must protect the journal from user-level
> process operation, or we are gonna have serious headaches in the user support
> dept. :-(

Maybe at least stick a nice big warning in the docs along the lines of "do
not write to your journal file while mounted with journaling on, you big
dummy!" :) Not that I'd do so deliberately of course, but it might make
people a little more wary later on. The README does recommend setting the
permissions to 400, but that doesn't protect from root of course.

Is there any reason you _would_ want to be able to write to the journal
file from userland while mounted? I'd guess no...

-- brion vibber (brion@pobox.com)


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