LU-3285 lfs: add parameter for Data-on-MDT file

[fs/lustre-release.git] / lustre / lod / lod_lov.c

diff --git a/lustre/lod/lod_lov.c b/lustre/lod/lod_lov.c
index a7e6129..663cbb2 100644 (file)
--- a/lustre/lod/lod_lov.c
+++ b/lustre/lod/lod_lov.c
@@ -1705,14 +1705,36 @@ int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf,
                                     le32_to_cpu(ent->lcme_offset);
                        tmp.lb_len = le32_to_cpu(ent->lcme_size);
 
-                       /* Check DoM entry is always the first one */
+                       /* Checks for DoM entry in composite layout. */
                        lum = tmp.lb_buf;
                        if (lov_pattern(le32_to_cpu(lum->lmm_pattern)) ==
-                           LOV_PATTERN_MDT && i > 0) {
-                               CDEBUG(D_LAYOUT, "invalid DoM layout entry "
-                                      "found at %i index\n", i);
-                               RETURN(-EINVAL);
-
+                           LOV_PATTERN_MDT) {
+                               /* DoM component can be only the first entry */
+                               if (i > 0) {
+                                       CDEBUG(D_LAYOUT, "invalid DoM layout "
+                                              "entry found at %i index\n", i);
+                                       RETURN(-EINVAL);
+                               }
+                               stripe_size = le32_to_cpu(lum->lmm_stripe_size);
+                               /* There is just one stripe on MDT and it must
+                                * cover whole component size. */
+                               if (stripe_size != prev_end) {
+                                       CDEBUG(D_LAYOUT, "invalid DoM layout "
+                                              "stripe size %u != %llu "
+                                              "(component size)\n",
+                                              stripe_size, prev_end);
+                                       RETURN(-EINVAL);
+                               }
+                               /* Check stripe size againts per-MDT limit */
+                               if (stripe_size > d->lod_dom_max_stripesize) {
+                                       CDEBUG(D_LAYOUT, "DoM component size "
+                                              "%u is bigger than MDT limit "
+                                              "%u, check dom_max_stripesize"
+                                              " parameter\n",
+                                              stripe_size,
+                                              d->lod_dom_max_stripesize);
+                                       RETURN(-EINVAL);
+                               }
                        }
                        rc = lod_verify_v1v3(d, &tmp, is_from_disk);
                        if (rc)