Re: Oops with ext3 journaling
Hi, On Wed, 8 Dec 1999 17:28:49 -0500, "Theodore Y. Ts'o" [EMAIL PROTECTED] said: Never fear, there will be an very easy way to switch back and forth between ext2 and ext3. A single mount command, or at most a single tune2fs command, should be all that it takes, no matter how the journal is stored. Absolutely. I am 100% committed to this. Apart from anything else, this is the mechanism which will allow for incompatible revisions of the ext3 journal format: you will always be able to mount a journaled ext3 partition as ext2, and then remount as the new ext3, if you want to upgrade ext3 partitions to a new, incompatible format (which should not happen after final release, but there will be at least one such incompatible format revision required in the next month or so). Any such format changes will be limited to the journal format: there will be no journaling changes which prevent backing the filesystem revision back down to ext2. Ever. --Stephen
Re: Oops with ext3 journaling
In message [EMAIL PROTECTED], Pavel Machek writes: Hi! No, and I'm pretty much convinced now that I'll move to having a private, hidden inode for the journal in the future. Please don't do that. Current way of switching ext2/ext3 is very nice. If someone wants to shoot in their foot... Pavel IMHO, as a long term solution, ext3 should have as few ways to shoot oneself in the foot as possible. Hackers usually won't do "stupid" things (at least not unintentionally :-), but hoards of Joe-users will. I'm really [EMAIL PROTECTED] Look at http://195.113.31.123/~pavel. Pavel Hi! I'm a .signature virus! Copy me into your ~/.signature, please! Erez.
Re: Oops with ext3 journaling
Hi! No, and I'm pretty much convinced now that I'll move to having a private, hidden inode for the journal in the future. Please don't do that. Current way of switching ext2/ext3 is very nice. If someone wants to shoot in their foot... Pavel -- I'm really [EMAIL PROTECTED] Look at http://195.113.31.123/~pavel. Pavel Hi! I'm a .signature virus! Copy me into your ~/.signature, please!
Re: Oops with ext3 journaling
Hi, On Sat, 4 Dec 1999 08:44:46 -0800 (PST), Brion Vibber [EMAIL PROTECTED] said: 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. "chattr +i journal.dat" will protect even from root. Is there any reason you _would_ want to be able to write to the journal file from userland while mounted? I'd guess no... No, and I'm pretty much convinced now that I'll move to having a private, hidden inode for the journal in the future. --Stephen
Re: Oops with ext3 journaling
Hi, On Sat, 4 Dec 1999 12:11:58 -0700, mike burrell [EMAIL PROTECTED] said: couldn't you just make a new flag for the inode that journal.dat uses? i'm guessing using S_IMMUTABLE will cause some problems, but something similar to that? The immutable flag will work fine: journaling bypasses the normal file write mechanisms, so it will work with an "immutable" journal quite safely. --Stephen
