From ed79dac98c5e9f8471456afe2cc09a3912586b52 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Fri, 22 Mar 2019 18:10:22 -0700 Subject: xfs: prohibit fstrim in norecovery mode The xfs fstrim implementation uses the free space btrees to find free space that can be discarded. If we haven't recovered the log, the bnobt will be stale and we absolutely *cannot* use stale metadata to zap the underlying storage. Signed-off-by: Darrick J. Wong Reviewed-by: Eric Sandeen --- fs/xfs/xfs_discard.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'fs/xfs/xfs_discard.c') diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c index 93f07edafd81..9ee2a7d02e70 100644 --- a/fs/xfs/xfs_discard.c +++ b/fs/xfs/xfs_discard.c @@ -161,6 +161,14 @@ xfs_ioc_trim( return -EPERM; if (!blk_queue_discard(q)) return -EOPNOTSUPP; + + /* + * We haven't recovered the log, so we cannot use our bnobt-guided + * storage zapping commands. + */ + if (mp->m_flags & XFS_MOUNT_NORECOVERY) + return -EROFS; + if (copy_from_user(&range, urange, sizeof(range))) return -EFAULT; -- cgit v1.2.3