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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2014, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
45 #include <lustre/lustre_idl.h>
46 #include <libcfs/libcfs.h>
58 * FLD (Fid Location Database) interface.
61 LUSTRE_CLI_FLD_HASH_DHT = 0,
62 LUSTRE_CLI_FLD_HASH_RRB
65 struct lu_fld_target {
66 struct list_head ft_chain;
67 struct obd_export *ft_exp;
68 struct lu_server_fld *ft_srv;
72 struct lu_server_fld {
74 * Fld dir proc entry. */
75 struct proc_dir_entry *lsf_proc_dir;
78 * /fld file object device */
79 struct dt_object *lsf_obj;
82 * super sequence controller export, needed to forward fld
84 struct obd_export *lsf_control_exp;
87 * Client FLD cache. */
88 struct fld_cache *lsf_cache;
91 * Protect index modifications */
92 struct mutex lsf_lock;
95 * Fld service name in form "fld-srv-lustre-MDTXXX" */
98 int (*lsf_seq_lookup)(const struct lu_env *env,
99 struct lu_server_fld *fld, u64 seq,
100 struct lu_seq_range *range);
103 * Just reformatted or upgraded, and this flag is being
104 * used to check whether the local FLDB is needs to be
105 * synced with global FLDB(in MDT0), and it is only needed
106 * if the MDT is upgraded from < 2.6 to 2.6, i.e. when the
107 * local FLDB is being invited */
108 unsigned int lsf_new:1;
112 struct lu_client_fld {
114 * Client side proc entry. */
115 struct proc_dir_entry *lcf_proc_dir;
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 proc entry name. */
145 int fld_server_init(const struct lu_env *env, struct lu_server_fld *fld,
146 struct dt_device *dt, const char *prefix, int type);
148 void fld_server_fini(const struct lu_env *env, struct lu_server_fld *fld);
150 int fld_declare_server_create(const struct lu_env *env,
151 struct lu_server_fld *fld,
152 const struct lu_seq_range *range,
155 int fld_server_create(const struct lu_env *env,
156 struct lu_server_fld *fld,
157 const struct lu_seq_range *add_range,
160 int fld_insert_entry(const struct lu_env *env,
161 struct lu_server_fld *fld,
162 const struct lu_seq_range *range);
164 int fld_server_lookup(const struct lu_env *env, struct lu_server_fld *fld,
165 u64 seq, struct lu_seq_range *range);
167 int fld_local_lookup(const struct lu_env *env, struct lu_server_fld *fld,
168 u64 seq, struct lu_seq_range *range);
170 int fld_update_from_controller(const struct lu_env *env,
171 struct lu_server_fld *fld);
174 int fld_client_init(struct lu_client_fld *fld,
175 const char *prefix, int hash);
177 void fld_client_fini(struct lu_client_fld *fld);
179 void fld_client_flush(struct lu_client_fld *fld);
181 int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
182 __u32 flags, const struct lu_env *env);
184 int fld_client_create(struct lu_client_fld *fld,
185 struct lu_seq_range *range,
186 const struct lu_env *env);
188 int fld_client_delete(struct lu_client_fld *fld, u64 seq,
189 const struct lu_env *env);
191 int fld_client_add_target(struct lu_client_fld *fld,
192 struct lu_fld_target *tar);
194 int fld_client_del_target(struct lu_client_fld *fld,
197 void fld_client_proc_fini(struct lu_client_fld *fld);