4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
40 static inline int lov_stripe_md_size(__u16 stripes)
42 return sizeof(struct lov_stripe_md) + stripes*sizeof(struct lov_oinfo*);
45 static inline __u32 lov_mds_md_size(__u16 stripes, __u32 lmm_magic)
47 if (lmm_magic == LOV_MAGIC_V3)
48 return sizeof(struct lov_mds_md_v3) +
49 stripes * sizeof(struct lov_ost_data_v1);
51 return sizeof(struct lov_mds_md_v1) +
52 stripes * sizeof(struct lov_ost_data_v1);
55 struct lov_version_size {
61 static inline __u32 lov_mds_md_stripecnt(int ea_size, __u32 lmm_magic)
63 static const struct lov_version_size lmm_ver_size[] = {
64 { .lvs_magic = LOV_MAGIC_V3,
65 .lvs_lmm_size = sizeof(struct lov_mds_md_v3),
66 .lvs_lod_size = sizeof(struct lov_ost_data_v1) },
67 { .lvs_magic = LOV_MAGIC_V1,
68 .lvs_lmm_size = sizeof(struct lov_mds_md_v1),
69 .lvs_lod_size = sizeof(struct lov_ost_data_v1)} };
72 for (i = 0; i < ARRAY_SIZE(lmm_ver_size); i++) {
73 if (lmm_magic == lmm_ver_size[i].lvs_magic) {
74 if (ea_size <= lmm_ver_size[i].lvs_lmm_size)
76 return (ea_size - lmm_ver_size[i].lvs_lmm_size) /
77 lmm_ver_size[i].lvs_lod_size;
81 /* Invalid LOV magic, so no stripes could fit */
85 #define IOC_LOV_TYPE 'g'
86 #define IOC_LOV_MIN_NR 50
87 #define IOC_LOV_SET_OSC_ACTIVE _IOWR('g', 50, long)
88 #define IOC_LOV_MAX_NR 50
90 #define QOS_DEFAULT_THRESHOLD 10 /* MB */
91 #define QOS_DEFAULT_MAXAGE 5 /* Seconds */