LU-1187 utils: add lfs setdirstripe/getdirstripe

[fs/lustre-release.git] / lustre / lmv / lmv_obd.c

diff --git a/lustre/lmv/lmv_obd.c b/lustre/lmv/lmv_obd.c
index c8fda0a..763a6b1 100644 (file)
--- a/lustre/lmv/lmv_obd.c
+++ b/lustre/lmv/lmv_obd.c
@@ -962,13 +962,41 @@ static int lmv_placement_policy(struct obd_device *obd,
                                 struct md_op_data *op_data,
                                 mdsno_t *mds)
 {
+       struct lmv_obd          *lmv = &obd->u.lmv;
+       ENTRY;
+
        LASSERT(mds != NULL);
 
-       /* Allocate new fid on target according to to different
-        * QOS policy. In DNE phase I, llite should always tell
-        * which MDT where the dir will be located */
-       *mds = op_data->op_mds;
+       if (lmv->desc.ld_tgt_count == 1) {
+               *mds = 0;
+               RETURN(0);
+       }
 
+       /**
+        * If stripe_offset is provided during setdirstripe
+        * (setdirstripe -i xx), xx MDS will be choosen.
+        */
+       if (op_data->op_cli_flags & CLI_SET_MEA) {
+               struct lmv_user_md *lum;
+
+               lum = (struct lmv_user_md *)op_data->op_data;
+               if (lum->lum_type == LMV_STRIPE_TYPE &&
+                   lum->lum_stripe_offset != -1) {
+                       if (lum->lum_stripe_offset >= lmv->desc.ld_tgt_count) {
+                               CERROR("%s: Stripe_offset %d > MDT count %d:"
+                                      " rc = %d\n", obd->obd_name,
+                                      lum->lum_stripe_offset,
+                                      lmv->desc.ld_tgt_count, -ERANGE);
+                               RETURN(-ERANGE);
+                       }
+                       *mds = lum->lum_stripe_offset;
+                       RETURN(0);
+               }
+       }
+
+       /* Allocate new fid on target according to operation type and parent
+        * home mds. */
+       *mds = op_data->op_mds;
        RETURN(0);
 }