linux-ext4 - Can one file system be R/W mounted multiple times in Linux?

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-next>] [day] [month] [year] [list]

Message-ID: <F792CF86EFE20D4AB8064279AFBA51C61EA72765@SIXPRD3002MB028.064d.mgd.msft.net>
Date:	Fri, 9 Jan 2015 03:44:16 +0000
From:	Dexuan Cui <decui@...rosoft.com>
To:	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	'linux-ext4' <linux-ext4@...r.kernel.org>
CC:	"stefanha@...hat.com" <stefanha@...hat.com>
Subject: Can one file system be R/W mounted multiple times in Linux?

The 'mount' utility allows me to mount 1 file systems multiple times at different
mount points, like "mount /dev/sdb1 /a; mount /dev/sdb1 /b".

I tried to write from /a and /b at the same time and it seems everything is OK
and no data corruption happens.
I tried only  ext4 only.

Can somebody please tell me if this usage is safe?

I'm not familiar with the internals of fs.
googling can't find an affirmative answer, I think.

Thanks,
-- Dexuan

--
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