linux-kernel - Re: [PATCH 01/17] pramfs: documentation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 08 Jan 2011 09:16:37 +0100
From:	Marco Stornelli <marco.stornelli@...il.com>
To:	Tony Luck <tony.luck@...el.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linux Embedded <linux-embedded@...r.kernel.org>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	Tim Bird <tim.bird@...sony.com>
Subject: Re: [PATCH 01/17] pramfs: documentation

On 07/01/2011 22:59, Tony Luck wrote:
> On Fri, Jan 7, 2011 at 12:30 PM, Marco Stornelli
> <marco.stornelli@...il.com> wrote:
>> constraint). About the errors: pramfs does not maintain file data in the
>> page caches for normal file I/O, so no writeback, the read/write
>> operation are done with direct io and they are always sync. The data are
>> write protected in hw when the arch provide this facility (x86 does).
>> Inode contains a checksum and when there are problems they are marked as
>> bad. Superblock contains checksum and there is a redundant superblock.
> 
> But you can still get pramfs inconsistencies if the system crashes at an
> inopportune moment. E.g. when making files you write the new inode to
> pramfs, and then you insert the entry into the directory. A crash between
> these two operations leaves an allocated inode that doesn't appear in
> any directory.  Without a fsck option, it will be hard to see that you have
> this problem, and your only recovery option is to wipe *all* files by making
> a new filesystem.

Is it a problem if you lost some logs? However do you expect that fsck
in this case will drop the inode?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/