1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2013, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #define DEBUG_SUBSYSTEM S_LMV
38 #include <linux/slab.h>
39 #include <linux/module.h>
40 #include <linux/pagemap.h>
41 #include <asm/div64.h>
42 #include <linux/seq_file.h>
43
44 #include "../include/obd_support.h"
45 #include "../include/lustre/lustre_idl.h"
46 #include "../include/lustre_fid.h"
47 #include "../include/lustre_lib.h"
48 #include "../include/lustre_net.h"
49 #include "../include/lustre_dlm.h"
50 #include "../include/obd_class.h"
51 #include "../include/lprocfs_status.h"
52 #include "lmv_internal.h"
53
lmv_fld_lookup(struct lmv_obd * lmv,const struct lu_fid * fid,u32 * mds)54 int lmv_fld_lookup(struct lmv_obd *lmv,
55 const struct lu_fid *fid,
56 u32 *mds)
57 {
58 int rc;
59
60 /* FIXME: Currently ZFS still use local seq for ROOT unfortunately, and
61 * this fid_is_local check should be removed once LU-2240 is fixed */
62 LASSERTF((fid_seq_in_fldb(fid_seq(fid)) ||
63 fid_seq_is_local_file(fid_seq(fid))) &&
64 fid_is_sane(fid), DFID" is insane!\n", PFID(fid));
65
66 rc = fld_client_lookup(&lmv->lmv_fld, fid_seq(fid), mds,
67 LU_SEQ_RANGE_MDT, NULL);
68 if (rc) {
69 CERROR("Error while looking for mds number. Seq %#llx, err = %d\n",
70 fid_seq(fid), rc);
71 return rc;
72 }
73
74 CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
75 *mds, PFID(fid));
76
77 if (*mds >= lmv->desc.ld_tgt_count) {
78 CERROR("FLD lookup got invalid mds #%x (max: %x) for fid=" DFID "\n", *mds, lmv->desc.ld_tgt_count,
79 PFID(fid));
80 rc = -EINVAL;
81 }
82 return rc;
83 }
84