LU-3285 lov: add MDT target to the LOV device

[fs/lustre-release.git] / lustre / lov / lov_ea.c

diff --git a/lustre/lov/lov_ea.c b/lustre/lov/lov_ea.c
index b29bb43..8025d1c 100644 (file)
--- a/lustre/lov/lov_ea.c
+++ b/lustre/lov/lov_ea.c
@@ -90,7 +90,8 @@ static int lsm_lmm_verify_v1v3(struct lov_mds_md *lmm, size_t lmm_size,
                return -EINVAL;
        }
 
-       if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
+       if (lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_MDT &&
+           lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_RAID0) {
                CERROR("bad striping pattern\n");
                lov_dump_lmm_common(D_WARNING, lmm);
                return -EINVAL;
@@ -201,6 +202,12 @@ lsme_unpack(struct lov_obd *lov, struct lov_mds_md *lmm, size_t buf_size,
                        GOTO(out_lsme, rc = -E2BIG);
        }
 
+       /* with Data-on-MDT set maxbytes to stripe size */
+       if (lsme_is_dom(lsme)) {
+               lov_bytes = lsme->lsme_stripe_size;
+               goto out_dom;
+       }
+
        for (i = 0; i < stripe_count; i++) {
                struct lov_oinfo *loi;
                struct lov_tgt_desc *ltd;
@@ -244,6 +251,7 @@ lsme_unpack(struct lov_obd *lov, struct lov_mds_md *lmm, size_t buf_size,
 
        lov_bytes = min_stripe_maxbytes * stripe_count;
 
+out_dom:
        if (maxbytes != NULL) {
                if (lov_bytes < min_stripe_maxbytes) /* handle overflow */
                        *maxbytes = MAX_LFS_FILESIZE;
@@ -381,7 +389,8 @@ lsme_unpack_comp(struct lov_obd *lov, struct lov_mds_md *lmm,
        unsigned int stripe_count;
 
        stripe_count = le16_to_cpu(lmm->lmm_stripe_count);
-       if (stripe_count == 0)
+       if (stripe_count == 0 &&
+           lov_pattern(le32_to_cpu(lmm->lmm_pattern)) != LOV_PATTERN_MDT)
                RETURN(ERR_PTR(-EINVAL));
        /* un-instantiated lmm contains no ost id info, i.e. lov_ost_data_v1 */
        if (!inited)
@@ -467,9 +476,10 @@ lsm_unpackmd_comp_md_v1(struct lov_obd *lov, void *buf, size_t buf_size)
                                            maxbytes;
                        /* the last component hasn't been defined, or
                         * lsm_maxbytes overflowed. */
-                       if (lsme->lsme_extent.e_end != LUSTRE_EOF ||
-                           lsm->lsm_maxbytes <
-                           (loff_t)lsme->lsme_extent.e_start)
+                       if (!lsme_is_dom(lsme) &&
+                           (lsme->lsme_extent.e_end != LUSTRE_EOF ||
+                            lsm->lsm_maxbytes <
+                            (loff_t)lsme->lsme_extent.e_start))
                                lsm->lsm_maxbytes = MAX_LFS_FILESIZE;
                }
        }