[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20121121020056.10225.15220.stgit@blackbox.djwong.org>
Date: Tue, 20 Nov 2012 18:00:56 -0800
From: "Darrick J. Wong" <darrick.wong@...cle.com>
To: axboe@...nel.dk, lucho@...kov.net, jack@...e.cz, ericvh@...il.com,
tytso@....edu, rminnich@...dia.gov, viro@...iv.linux.org.uk
Cc: martin.petersen@...cle.com, neilb@...e.de, david@...morbit.com,
linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
adilger.kernel@...ger.ca, bharrosh@...asas.com, jlayton@...ba.org,
v9fs-developer@...ts.sourceforge.net, linux-ext4@...r.kernel.org
Subject: [PATCH 4/4] ext3: Warn if mounting rw on a disk requiring stable page
writes
ext3 doesn't properly isolate pages from changes during writeback. Since the
recommended fix is to use ext4, for now we'll just print a warning if the user
tries to mount in write mode.
Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
fs/ext3/super.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index 5366393..5b3725d 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -1325,6 +1325,14 @@ static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
"forcing read-only mode");
res = MS_RDONLY;
}
+ if (!read_only &&
+ queue_requires_stable_pages(bdev_get_queue(sb->s_bdev))) {
+ ext3_msg(sb, KERN_ERR,
+ "error: ext3 cannot safely write data to a disk "
+ "requiring stable pages writes; forcing read-only "
+ "mode. Upgrading to ext4 is recommended.");
+ res = MS_RDONLY;
+ }
if (read_only)
return res;
if (!(sbi->s_mount_state & EXT3_VALID_FS))
--
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
Powered by blists - more mailing lists