From: Steven Whitehouse <swhiteho@redhat.com>
To: cluster-devel.redhat.com
Subject: [Cluster-devel] GFS2: Fix cache coherency between truncate and O_DIRECT read
Date: Tue, 09 Jun 2009 17:07:16 +0100 [thread overview]
Message-ID: <1244563636.29604.798.camel@localhost.localdomain> (raw)
If a page was partially zeroed as the result of a truncate, then it was
not being correctly marked dirty. This resulted in the deleted data
reappearing if the file was read back via direct I/O.
Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 1153a07..3297635 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1012,7 +1012,7 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
gfs2_trans_add_bh(ip->i_gl, bh, 0);
zero_user(page, offset, length);
-
+ mark_buffer_dirty(bh);
unlock:
unlock_page(page);
page_cache_release(page);
reply other threads:[~2009-06-09 16:07 UTC|newest]
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