diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index aeffeaaac0ec..f1026e86dabc 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -3224,12 +3224,24 @@ xfs_bmap_extsize_align( align_alen += temp; align_off -= temp; } + + /* Same adjustment for the end of the requested area. */ + temp = (align_alen % extsz); + if (temp) + align_alen += extsz - temp; + /* - * Same adjustment for the end of the requested area. + * For large extent hint sizes, the aligned extent might be larger than + * MAXEXTLEN. In that case, reduce the size by an extsz so that it pulls + * the length back under MAXEXTLEN. The outer allocation loops handle + * short allocation just fine, so it is safe to do this. We only want to + * do it when we are forced to, though, because it means more allocation + * operations are required. */ - if ((temp = (align_alen % extsz))) { - align_alen += extsz - temp; - } + while (align_alen > MAXEXTLEN) + align_alen -= extsz; + ASSERT(align_alen <= MAXEXTLEN); + /* * If the previous block overlaps with this proposed allocation * then move the start forward without adjusting the length. @@ -3318,7 +3330,9 @@ xfs_bmap_extsize_align( return -EINVAL; } else { ASSERT(orig_off >= align_off); - ASSERT(orig_end <= align_off + align_alen); + /* see MAXEXTLEN handling above */ + ASSERT(orig_end <= align_off + align_alen || + align_alen + extsz > MAXEXTLEN); } #ifdef DEBUG @@ -4099,13 +4113,6 @@ xfs_bmapi_reserve_delalloc( /* Figure out the extent size, adjust alen */ extsz = xfs_get_extsz_hint(ip); if (extsz) { - /* - * Make sure we don't exceed a single extent length when we - * align the extent by reducing length we are going to - * allocate by the maximum amount extent size aligment may - * require. - */ - alen = XFS_FILBLKS_MIN(len, MAXEXTLEN - (2 * extsz - 1)); error = xfs_bmap_extsize_align(mp, got, prev, extsz, rt, eof, 1, 0, &aoff, &alen); ASSERT(!error); |