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Date: Thu, 7 Feb 2008 15:00:08 GMT
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To: freebsd-bugs@FreeBSD.org
From: Yar Tikhiy <yar@comp.chem.msu.su>
Cc: 
Subject: Re: kern/120319: fsck on read-only root fs upgrades it to read-write
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The following reply was made to PR kern/120319; it has been noted by GNATS.

From: Yar Tikhiy <yar@comp.chem.msu.su>
To: Jaakko Heinonen <jh@saunalahti.fi>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/120319: fsck on read-only root fs upgrades it to read-write
Date: Thu, 7 Feb 2008 17:58:51 +0300

 On Thu, Feb 07, 2008 at 12:19:48PM +0200, Jaakko Heinonen wrote:
 > 
 > This happens because the kernel doesn't set the "ro" mount option
 > initially for mounts in vfs_mountroot_try() (vfs_mount.c). ffs_mount()
 > remounts a file system as read-write if the "ro" option is missing.
 > 
 > Following patch adds the "ro" option for initial root mounts. It should
 > fix the problem. Could you verify that?
 
 You've hit the nail on the head!  Now the question is: Which of the
 two functions should be fixed after all?  Some parts of the system
 seem to rely solely on MNT_RDONLY to get a read-only mount, so it
 might be wrong for ffs_mount() to look for the "ro" option even if
 MNT_RDONLY is set in the mount flags.  Any ideas?
 
 Thanks!
 
 -- 
 Yar