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Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap.c')
-rw-r--r--fs/xfs/libxfs/xfs_bmap.c31
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);