xfs: limit specualtive delalloc to maxioffset
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: NDave Chinner <dchinner@redhat.com> Signed-off-by: NBen Myers <bpm@sgi.com>
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