1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
#ifndef _LMV_INTERNAL_H_
#define _LMV_INTERNAL_H_
#include <uapi/linux/lustre/lustre_idl.h>
#include <obd.h>
#include <lustre_lmv.h>
#define LMV_MAX_TGT_COUNT 128
#define LL_IT2STR(it) \
((it) ? ldlm_it2str((it)->it_op) : "0")
int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
struct lookup_intent *it, struct ptlrpc_request **reqp,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags);
int lmv_fld_lookup(struct lmv_obd *lmv, const struct lu_fid *fid, u32 *mds);
int __lmv_fid_alloc(struct lmv_obd *lmv, struct lu_fid *fid, u32 mds);
int lmv_fid_alloc(const struct lu_env *env, struct obd_export *exp,
struct lu_fid *fid, struct md_op_data *op_data);
int lmv_revalidate_slaves(struct obd_export *exp,
const struct lmv_stripe_md *lsm,
ldlm_blocking_callback cb_blocking,
int extra_lock_flags);
static inline struct obd_device *lmv2obd_dev(struct lmv_obd *lmv)
{
return container_of0(lmv, struct obd_device, u.lmv);
}
static inline struct lmv_tgt_desc *
lmv_get_target(struct lmv_obd *lmv, u32 mdt_idx, int *index)
{
int i;
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (!lmv->tgts[i])
continue;
if (lmv->tgts[i]->ltd_idx == mdt_idx) {
if (index)
*index = i;
return lmv->tgts[i];
}
}
return ERR_PTR(-ENODEV);
}
static inline int
lmv_find_target_index(struct lmv_obd *lmv, const struct lu_fid *fid)
{
struct lmv_tgt_desc *ltd;
u32 mdt_idx = 0;
int index = 0;
if (lmv->desc.ld_tgt_count > 1) {
int rc;
rc = lmv_fld_lookup(lmv, fid, &mdt_idx);
if (rc < 0)
return rc;
}
ltd = lmv_get_target(lmv, mdt_idx, &index);
if (IS_ERR(ltd))
return PTR_ERR(ltd);
return index;
}
static inline struct lmv_tgt_desc *
lmv_find_target(struct lmv_obd *lmv, const struct lu_fid *fid)
{
int index;
index = lmv_find_target_index(lmv, fid);
if (index < 0)
return ERR_PTR(index);
return lmv->tgts[index];
}
static inline int lmv_stripe_md_size(int stripe_count)
{
struct lmv_stripe_md *lsm;
return sizeof(*lsm) + stripe_count * sizeof(lsm->lsm_md_oinfo[0]);
}
int lmv_name_to_stripe_index(enum lmv_hash_type hashtype,
unsigned int max_mdt_index,
const char *name, int namelen);
static inline const struct lmv_oinfo *
lsm_name_to_stripe_info(const struct lmv_stripe_md *lsm, const char *name,
int namelen)
{
int stripe_index;
stripe_index = lmv_name_to_stripe_index(lsm->lsm_md_hash_type,
lsm->lsm_md_stripe_count,
name, namelen);
if (stripe_index < 0)
return ERR_PTR(stripe_index);
LASSERTF(stripe_index < lsm->lsm_md_stripe_count,
"stripe_index = %d, stripe_count = %d hash_type = %x name = %.*s\n",
stripe_index, lsm->lsm_md_stripe_count,
lsm->lsm_md_hash_type, namelen, name);
return &lsm->lsm_md_oinfo[stripe_index];
}
static inline bool lmv_need_try_all_stripes(const struct lmv_stripe_md *lsm)
{
return !lmv_is_known_hash_type(lsm->lsm_md_hash_type) ||
lsm->lsm_md_hash_type & LMV_HASH_FLAG_MIGRATION;
}
struct lmv_tgt_desc
*lmv_locate_mds(struct lmv_obd *lmv, struct md_op_data *op_data,
struct lu_fid *fid);
/* lproc_lmv.c */
void lprocfs_lmv_init_vars(struct lprocfs_static_vars *lvars);
extern const struct file_operations lmv_proc_target_fops;
#endif
|
