From: Dave Chinner <david@fromorbit.com>
To: xfs@oss.sgi.com
Subject: [PATCH 5/3] xfs: limit specualtive delalloc to maxioffset
Date: Sun, 29 Apr 2012 22:43:19 +1000 [thread overview]
Message-ID: <20120429124319.GT9541@dastard> (raw)
In-Reply-To: <1335519922-14371-1-git-send-email-david@fromorbit.com>
From: Dave Chinner <dchinner@redhat.com>
Speculative delayed allocation beyond EOF near the maximum supported
file offset can result in creating delalloc extents beyond
mp->m_maxioffset (8EB). These can never be trimmed during
xfs_free_eof_blocks() because they are beyond mp->m_maxioffset, and
that results in assert failures in xfs_fs_destroy_inode() due to
delalloc blocks still being present. xfstests 071 exposes this
problem.
Limit speculative delalloc to mp->m_maxioffset to avoid this
problem.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/xfs_iomap.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 303c03a..4a08ea3 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -412,6 +412,15 @@ retry:
return error;
}
+ /*
+ * Make sure preallocation does not create extents beyond the range we
+ * actually support in this filesystem.
+ */
+ if (last_fsb > XFS_B_TO_FSB(mp, mp->m_maxioffset))
+ last_fsb = XFS_B_TO_FSB(mp, mp->m_maxioffset);
+
+ ASSERT(last_fsb > offset_fsb);
+
nimaps = XFS_WRITE_IMAPS;
error = xfs_bmapi_delay(ip, offset_fsb, last_fsb - offset_fsb,
imap, &nimaps, XFS_BMAPI_ENTIRE);
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next prev parent reply other threads:[~2012-04-29 12:43 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-27 9:45 [PATCH 0/3] xfs: failed writes and stale delalloc blocks Dave Chinner
2012-04-27 9:45 ` [PATCH 1/3] xfs: punch all delalloc blocks beyond EOF on write failure Dave Chinner
2012-04-30 13:49 ` Christoph Hellwig
2012-04-27 9:45 ` [PATCH 2/3] xfs: punch new delalloc blocks out of failed writes inside EOF Dave Chinner
2012-05-07 22:00 ` Ben Myers
2012-04-27 9:45 ` [PATCH 3/3] xfs: prevent needless mount warning causing test failures Dave Chinner
2012-05-08 16:29 ` Ben Myers
2012-05-08 22:42 ` Dave Chinner
2012-04-29 11:16 ` [PATCH 4/3] xfs: don't assert on delalloc regions beyond EOF Dave Chinner
2012-05-08 17:26 ` Ben Myers
2012-04-29 12:43 ` Dave Chinner [this message]
2012-05-08 18:02 ` [PATCH 5/3] xfs: limit specualtive delalloc to maxioffset Ben Myers
2012-04-29 12:57 ` [PATCH 6/3] xfs: make largest supported offset less shouty Dave Chinner
2012-04-29 21:58 ` Christoph Hellwig
2012-04-30 1:11 ` Dave Chinner
2012-04-30 3:03 ` Dave Chinner
2012-05-08 18:15 ` Ben Myers
2012-05-08 22:43 ` Dave Chinner
2012-05-09 19:14 ` Ben Myers
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