LU-3647 hsm: Add support to drop all pages for ll_data_version

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

diff --git a/lustre/lov/lov_merge.c b/lustre/lov/lov_merge.c
index 0230a52..fdd160f 100644 (file)
--- a/lustre/lov/lov_merge.c
+++ b/lustre/lov/lov_merge.c
@@ -189,38 +189,49 @@ int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
                      struct lov_stripe_md *lsm, int stripeno, int *set)
 {
-        valid &= src->o_valid;
-
-        if (*set) {
-                if (valid & OBD_MD_FLSIZE) {
-                        /* this handles sparse files properly */
-                        obd_size lov_size;
-
-                        lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
-                        if (lov_size > tgt->o_size)
-                                tgt->o_size = lov_size;
-                }
-                if (valid & OBD_MD_FLBLOCKS)
-                        tgt->o_blocks += src->o_blocks;
-                if (valid & OBD_MD_FLBLKSZ)
-                        tgt->o_blksize += src->o_blksize;
-                if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
-                        tgt->o_ctime = src->o_ctime;
-                if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
-                        tgt->o_mtime = src->o_mtime;
-                if (valid & OBD_MD_FLDATAVERSION)
-                        tgt->o_data_version += src->o_data_version;
+       valid &= src->o_valid;
+
+       if (*set != 0) {
+               tgt->o_valid &= valid;
+               if (valid & OBD_MD_FLSIZE) {
+                       /* this handles sparse files properly */
+                       obd_size lov_size;
+
+                       lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
+                       if (lov_size > tgt->o_size)
+                               tgt->o_size = lov_size;
+               }
+               if (valid & OBD_MD_FLBLOCKS)
+                       tgt->o_blocks += src->o_blocks;
+               if (valid & OBD_MD_FLBLKSZ)
+                       tgt->o_blksize += src->o_blksize;
+               if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
+                       tgt->o_ctime = src->o_ctime;
+               if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
+                       tgt->o_mtime = src->o_mtime;
+               if (valid & OBD_MD_FLDATAVERSION)
+                       tgt->o_data_version += src->o_data_version;
+
+               /* handle flags */
+               if (valid & OBD_MD_FLFLAGS)
+                       tgt->o_flags &= src->o_flags;
+               else
+                       tgt->o_flags = 0;
        } else {
                memcpy(tgt, src, sizeof(*tgt));
                tgt->o_oi = lsm->lsm_oi;
+               tgt->o_valid = valid;
                if (valid & OBD_MD_FLSIZE)
                        tgt->o_size = lov_stripe_size(lsm, src->o_size,
                                                      stripeno);
+               tgt->o_flags = 0;
+               if (valid & OBD_MD_FLFLAGS)
+                       tgt->o_flags = src->o_flags;
        }
 
-        /* data_version needs to be valid on all stripes to be correct! */
-        if (!(valid & OBD_MD_FLDATAVERSION))
-                tgt->o_valid &= ~OBD_MD_FLDATAVERSION;
+       /* data_version needs to be valid on all stripes to be correct! */
+       if (!(valid & OBD_MD_FLDATAVERSION))
+               tgt->o_valid &= ~OBD_MD_FLDATAVERSION;
 
-        *set += 1;
+       *set += 1;
 }