| 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 | |
| 54 | int lmv_fld_lookup(struct lmv_obd *lmv, |
| 55 | const struct lu_fid *fid, |
| 56 | mdsno_t *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) " |
| 79 | "for fid="DFID"\n", *mds, lmv->desc.ld_tgt_count, |
| 80 | PFID(fid)); |
| 81 | rc = -EINVAL; |
| 82 | } |
| 83 | return rc; |
| 84 | } |