Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / lmv / lmv_fld.c

diff --git a/kernel/drivers/staging/lustre/lustre/lmv/lmv_fld.c b/kernel/drivers/staging/lustre/lustre/lmv/lmv_fld.c
new file mode 100644 (file)
index 0000000..ee23592
--- /dev/null
+++ b/kernel/drivers/staging/lustre/lustre/lmv/lmv_fld.c
@@ -0,0 +1,83 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ */
+
+#define DEBUG_SUBSYSTEM S_LMV
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <asm/div64.h>
+#include <linux/seq_file.h>
+
+#include "../include/obd_support.h"
+#include "../include/lustre/lustre_idl.h"
+#include "../include/lustre_fid.h"
+#include "../include/lustre_lib.h"
+#include "../include/lustre_net.h"
+#include "../include/lustre_dlm.h"
+#include "../include/obd_class.h"
+#include "../include/lprocfs_status.h"
+#include "lmv_internal.h"
+
+int lmv_fld_lookup(struct lmv_obd *lmv,
+                  const struct lu_fid *fid,
+                  u32 *mds)
+{
+       int rc;
+
+       /* FIXME: Currently ZFS still use local seq for ROOT unfortunately, and
+        * this fid_is_local check should be removed once LU-2240 is fixed */
+       LASSERTF((fid_seq_in_fldb(fid_seq(fid)) ||
+                 fid_seq_is_local_file(fid_seq(fid))) &&
+                fid_is_sane(fid), DFID" is insane!\n", PFID(fid));
+
+       rc = fld_client_lookup(&lmv->lmv_fld, fid_seq(fid), mds,
+                              LU_SEQ_RANGE_MDT, NULL);
+       if (rc) {
+               CERROR("Error while looking for mds number. Seq %#llx, err = %d\n",
+                      fid_seq(fid), rc);
+               return rc;
+       }
+
+       CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
+              *mds, PFID(fid));
+
+       if (*mds >= lmv->desc.ld_tgt_count) {
+               CERROR("FLD lookup got invalid mds #%x (max: %x) for fid=" DFID "\n", *mds, lmv->desc.ld_tgt_count,
+                      PFID(fid));
+               rc = -EINVAL;
+       }
+       return rc;
+}