1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc. <adilger@clusterfs.com>
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * (Un)packing of OST/MDS requests
25 #define DEBUG_SUBSYSTEM S_LLITE
27 #include <linux/lustre_net.h>
28 #include <linux/obd.h>
29 #include <linux/obd_support.h>
31 void lov_packdesc(struct lov_desc *ld)
33 ld->ld_tgt_count = HTON__u32(ld->ld_tgt_count);
34 ld->ld_default_stripe_count = HTON__u32(ld->ld_default_stripe_count);
35 ld->ld_default_stripe_size = HTON__u32(ld->ld_default_stripe_size);
36 ld->ld_pattern = HTON__u32(ld->ld_pattern);
39 void lov_unpackdesc(struct lov_desc *ld)
41 ld->ld_tgt_count = NTOH__u32(ld->ld_tgt_count);
42 ld->ld_default_stripe_count = HTON__u32(ld->ld_default_stripe_count);
43 ld->ld_default_stripe_size = HTON__u32(ld->ld_default_stripe_size);
44 ld->ld_pattern = HTON__u32(ld->ld_pattern);
47 void lov_packmd(struct lov_mds_md *lmm, struct lov_stripe_md *lsm)
49 struct lov_oinfo *loi;
53 lmm->lmm_magic = (lsm->lsm_magic);
54 lmm->lmm_easize = (lsm->lsm_mds_easize);
55 lmm->lmm_object_id = (lsm->lsm_object_id);
56 lmm->lmm_stripe_size = (lsm->lsm_stripe_size);
57 lmm->lmm_stripe_pattern = (lsm->lsm_stripe_pattern);
58 lmm->lmm_ost_count = (lsm->lsm_ost_count);
59 lmm->lmm_stripe_count = (lsm->lsm_stripe_count);
60 lmm->lmm_stripe_offset = (lsm->lsm_stripe_offset);
62 /* Only fill in the object ids which we are actually using.
63 * Assumes lmd_objects is otherwise zero-filled. */
64 for (i = 0,loi = lsm->lsm_oinfo; i < lsm->lsm_stripe_count; i++,loi++) {
65 lmm->lmm_objects[loi->loi_ost_idx].l_object_id =
70 void lov_unpackmd(struct lov_stripe_md *lsm, struct lov_mds_md *lmm)
72 struct lov_oinfo *loi;
73 int ost_count, ost_offset;
77 lsm->lsm_magic = (lmm->lmm_magic);
78 lsm->lsm_mds_easize = (lmm->lmm_easize);
79 lsm->lsm_object_id = (lmm->lmm_object_id);
80 lsm->lsm_stripe_size = (lmm->lmm_stripe_size);
81 lsm->lsm_stripe_pattern = (lmm->lmm_stripe_pattern);
82 lsm->lsm_ost_count = (lmm->lmm_ost_count);
83 lsm->lsm_stripe_count = (lmm->lmm_stripe_count);
84 lsm->lsm_stripe_offset = (lmm->lmm_stripe_offset);
86 ost_count = lsm->lsm_ost_count;
87 ost_offset = lsm->lsm_stripe_offset;
89 for (i = 0, loi = lsm->lsm_oinfo; i < ost_count; i++, ost_offset++) {
90 ost_offset %= ost_count;
92 if (!lmm->lmm_objects[ost_offset].l_object_id)
95 LASSERT(loi - lsm->lsm_oinfo < lsm->lsm_stripe_count);
96 loi->loi_id = (lmm->lmm_objects[ost_offset].l_object_id);
97 loi->loi_ost_idx = ost_offset;
98 loi->loi_size = 0; /* set by LOV later */