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, 2013, 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 <lustre_mdt.h>
47 #include <dt_object.h>
49 #include <libcfs/libcfs.h>
56 extern const struct dt_index_features fld_index_features;
57 extern const char fld_index_name[];
60 * FLD (Fid Location Database) interface.
63 LUSTRE_CLI_FLD_HASH_DHT = 0,
64 LUSTRE_CLI_FLD_HASH_RRB
68 struct lu_fld_target {
70 struct obd_export *ft_exp;
71 struct lu_server_fld *ft_srv;
75 struct lu_server_fld {
77 * Fld dir proc entry. */
78 cfs_proc_dir_entry_t *lsf_proc_dir;
81 * /fld file object device */
82 struct dt_object *lsf_obj;
85 * super sequence controller export, needed to forward fld
87 struct obd_export *lsf_control_exp;
90 * Client FLD cache. */
91 struct fld_cache *lsf_cache;
94 * Protect index modifications */
95 struct mutex lsf_lock;
98 * Fld service name in form "fld-srv-lustre-MDTXXX" */
103 struct lu_client_fld {
105 * Client side proc entry. */
106 cfs_proc_dir_entry_t *lcf_proc_dir;
109 * List of exports client FLD knows about. */
110 cfs_list_t lcf_targets;
113 * Current hash to be used to chose an export. */
114 struct lu_fld_hash *lcf_hash;
121 * Lock protecting exports list and fld_hash. */
125 * Client FLD cache. */
126 struct fld_cache *lcf_cache;
129 * Client fld proc entry name. */
132 const struct lu_context *lcf_ctx;
138 * number of blocks to reserve for particular operations. Should be function of
139 * ... something. Stub for now.
142 /* one insert operation can involve two delete and one insert */
143 FLD_TXN_INDEX_INSERT_CREDITS = 60,
144 FLD_TXN_INDEX_DELETE_CREDITS = 20,
147 int fld_query(struct com_thread_info *info);
150 int fld_server_init(const struct lu_env *env, struct lu_server_fld *fld,
151 struct dt_device *dt, const char *prefix, int mds_node_id,
154 void fld_server_fini(const struct lu_env *env, struct lu_server_fld *fld);
156 int fld_declare_server_create(const struct lu_env *env,
157 struct lu_server_fld *fld,
158 struct lu_seq_range *new,
161 int fld_server_create(const struct lu_env *env,
162 struct lu_server_fld *fld,
163 struct lu_seq_range *add_range,
166 int fld_insert_entry(const struct lu_env *env,
167 struct lu_server_fld *fld,
168 const struct lu_seq_range *range);
170 int fld_server_lookup(const struct lu_env *env, struct lu_server_fld *fld,
171 seqno_t seq, struct lu_seq_range *range);
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, seqno_t seq, mdsno_t *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,
190 const struct lu_env *env);
192 int fld_client_add_target(struct lu_client_fld *fld,
193 struct lu_fld_target *tar);
195 int fld_client_del_target(struct lu_client_fld *fld,
198 void fld_client_proc_fini(struct lu_client_fld *fld);