linux-ext4 - [RFC][PATCH] Do not accept a new handle when the F.S is frozen

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:	Fri,  6 May 2011 18:20:30 +0300
From:	Surbhi Palande <surbhi.palande@...onical.com>
To:	jack@...e.cz
Cc:	toshi.okajima@...fujitsu.com, tytso@....edu,
	m.mizuma@...fujitsu.com, adilger.kernel@...ger.ca,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	sandeen@...hat.com
Subject: [RFC][PATCH] Do not accept a new handle when the F.S is frozen

This patch adds a flag which indicates that the journal is frozen or not and
introduces two new functions jbd2_journal_freeze and jbd2_journal_thaw which
should be called when the F.S freezes and thaws respectively. 
A new handle can only be started now when the barrier count is 0 and when the
journal is not in a frozen state. While the journal is in a frozen state,
trying to start a new handle would put the process on wait queue. Thawing the
journal would wake up all the processes waiting on this wait queue.

I have lightly tested this patch. Sending it here for initial review. Please
do let me know your inputs. Thanks a lot!

Warm Regards,
Surbhi.

--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html