LU-10318 dom: support DATA_VERSION IO type

[fs/lustre-release.git] / lustre / mdt / mdt_handler.c

diff --git a/lustre/mdt/mdt_handler.c b/lustre/mdt/mdt_handler.c
index 8ff002c..267f469 100644 (file)
--- a/lustre/mdt/mdt_handler.c
+++ b/lustre/mdt/mdt_handler.c
@@ -1304,6 +1304,12 @@ static int mdt_getattr(struct tgt_session_info *tsi)
         LASSERT(obj != NULL);
        LASSERT(lu_object_assert_exists(&obj->mot_obj));
 
+       /* Special case for Data-on-MDT files to get data version */
+       if (unlikely(reqbody->mbo_valid & OBD_MD_FLDATAVERSION)) {
+               rc = mdt_data_version_get(tsi);
+               GOTO(out, rc);
+       }
+
        /* Unlike intent case where we need to pre-fill out buffers early on
         * in intent policy for ldlm reasons, here we can have a much better
         * guess at EA size by just reading it from disk.
@@ -1313,7 +1319,6 @@ static int mdt_getattr(struct tgt_session_info *tsi)
                /* No easy way to know how long is the symlink, but it cannot
                 * be more than PATH_MAX, so we allocate +1 */
                rc = PATH_MAX + 1;
-
        /* A special case for fs ROOT: getattr there might fetch
         * default EA for entire fs, not just for this dir!
         */
@@ -1357,12 +1362,12 @@ static int mdt_getattr(struct tgt_session_info *tsi)
        info->mti_cross_ref = !!(reqbody->mbo_valid & OBD_MD_FLCROSSREF);
 
        rc = mdt_getattr_internal(info, obj, 0);
-        EXIT;
+       EXIT;
 out_shrink:
-        mdt_client_compatibility(info);
-        rc2 = mdt_fix_reply(info);
-        if (rc == 0)
-                rc = rc2;
+       mdt_client_compatibility(info);
+       rc2 = mdt_fix_reply(info);
+       if (rc == 0)
+               rc = rc2;
 out:
        mdt_thread_info_fini(info);
        return rc;