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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2015, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
40 #include <uapi/linux/lustre/lustre_idl.h>
41 #include <libcfs/libcfs.h>
42 #include <seq_range.h>
43 #include <lustre_fid.h>
55 * FLD (Fid Location Database) interface.
58 LUSTRE_CLI_FLD_HASH_DHT = 0,
59 LUSTRE_CLI_FLD_HASH_RRB
62 struct lu_fld_target {
63 struct list_head ft_chain;
64 struct obd_export *ft_exp;
65 struct lu_server_fld *ft_srv;
69 struct lu_server_fld {
71 * Fld dir debugfs entry.
73 struct dentry *lsf_debugfs_entry;
76 * /fld file object device */
77 struct dt_object *lsf_obj;
80 * super sequence controller export, needed to forward fld
82 struct obd_export *lsf_control_exp;
85 * Client FLD cache. */
86 struct fld_cache *lsf_cache;
89 * Protect index modifications */
90 struct mutex lsf_lock;
93 * Fld service name in form "fld-srv-lustre-MDTXXX"
95 char lsf_name[LUSTRE_MDT_MAXNAMELEN];
97 int (*lsf_seq_lookup)(const struct lu_env *env,
98 struct lu_server_fld *fld, u64 seq,
99 struct lu_seq_range *range);
102 * Just reformatted or upgraded, and this flag is being
103 * used to check whether the local FLDB is needs to be
104 * synced with global FLDB(in MDT0), and it is only needed
105 * if the MDT is upgraded from < 2.6 to 2.6, i.e. when the
106 * local FLDB is being invited */
107 unsigned int lsf_new:1;
111 struct lu_client_fld {
113 * Client side debugfs entry.
115 struct dentry *lcf_debugfs_entry;
118 * List of exports client FLD knows about. */
119 struct list_head lcf_targets;
122 * Current hash to be used to chose an export. */
123 struct lu_fld_hash *lcf_hash;
130 * Lock protecting exports list and fld_hash. */
134 * Client FLD cache. */
135 struct fld_cache *lcf_cache;
138 * Client fld debugfs entry name.
140 char lcf_name[LUSTRE_MDT_MAXNAMELEN];
144 int fld_server_init(const struct lu_env *env, struct lu_server_fld *fld,
145 struct dt_device *dt, const char *prefix, int type);
147 void fld_server_fini(const struct lu_env *env, struct lu_server_fld *fld);
149 int fld_declare_server_create(const struct lu_env *env,
150 struct lu_server_fld *fld,
151 const struct lu_seq_range *range,
154 int fld_server_create(const struct lu_env *env,
155 struct lu_server_fld *fld,
156 const struct lu_seq_range *add_range,
159 int fld_insert_entry(const struct lu_env *env,
160 struct lu_server_fld *fld,
161 const struct lu_seq_range *range);
163 int fld_server_lookup(const struct lu_env *env, struct lu_server_fld *fld,
164 u64 seq, struct lu_seq_range *range);
166 int fld_local_lookup(const struct lu_env *env, struct lu_server_fld *fld,
167 u64 seq, struct lu_seq_range *range);
169 int fld_update_from_controller(const struct lu_env *env,
170 struct lu_server_fld *fld);
173 int fld_client_init(struct lu_client_fld *fld,
174 const char *prefix, int hash);
176 void fld_client_fini(struct lu_client_fld *fld);
178 void fld_client_flush(struct lu_client_fld *fld);
180 int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
181 __u32 flags, const struct lu_env *env);
183 int fld_client_create(struct lu_client_fld *fld,
184 struct lu_seq_range *range,
185 const struct lu_env *env);
187 int fld_client_delete(struct lu_client_fld *fld, u64 seq,
188 const struct lu_env *env);
190 int fld_client_add_target(struct lu_client_fld *fld,
191 struct lu_fld_target *tar);
193 int fld_client_del_target(struct lu_client_fld *fld,
196 void fld_client_debugfs_fini(struct lu_client_fld *fld);