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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,
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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).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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37 #define DEBUG_SUBSYSTEM S_LMV
39 #include <linux/slab.h>
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/slab.h>
43 #include <linux/pagemap.h>
44 #include <asm/div64.h>
45 #include <linux/seq_file.h>
47 #include <liblustre.h>
50 #include <obd_support.h>
51 #include <lustre/lustre_idl.h>
52 #include <lustre_fid.h>
53 #include <lustre_lib.h>
54 #include <lustre_net.h>
55 #include <lustre_dlm.h>
56 #include <obd_class.h>
57 #include <lprocfs_status.h>
58 #include "lmv_internal.h"
60 int lmv_fld_lookup(struct lmv_obd *lmv,
61 const struct lu_fid *fid,
67 LASSERT(fid_is_sane(fid));
69 /* FIXME: Because ZFS still use LOCAL fid sequence for root,
70 * and root will always be in MDT0, for local fid, it will
71 * return 0 directly. And it should be removed once the root
72 * FID has been assigned with special sequence */
73 if (fid_seq(fid) == FID_SEQ_LOCAL_FILE) {
78 rc = fld_client_lookup(&lmv->lmv_fld, fid_seq(fid), mds,
79 LU_SEQ_RANGE_MDT, NULL);
81 CERROR("Error while looking for mds number. Seq "LPX64
82 ", err = %d\n", fid_seq(fid), rc);
86 CDEBUG(D_INODE, "FLD lookup got mds #%x for fid="DFID"\n",
89 if (*mds >= lmv->desc.ld_tgt_count) {
90 CERROR("FLD lookup got invalid mds #%x (max: %x) "
91 "for fid="DFID"\n", *mds, lmv->desc.ld_tgt_count,