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/
30 * Lustre is a trademark of Sun Microsystems, Inc.
41 #include <uapi/linux/lustre/lustre_idl.h>
42 #include <linux/libcfs/libcfs.h>
43 #include <seq_range.h>
50 extern const struct dt_index_features fld_index_features;
51 extern const char fld_index_name[];
54 * FLD (Fid Location Database) interface.
57 LUSTRE_CLI_FLD_HASH_DHT = 0,
58 LUSTRE_CLI_FLD_HASH_RRB
61 struct lu_fld_target {
62 struct list_head ft_chain;
63 struct obd_export *ft_exp;
64 struct lu_server_fld *ft_srv;
68 struct lu_server_fld {
70 * super sequence controller export, needed to forward fld
73 struct obd_export *lsf_control_exp;
75 /** Client FLD cache. */
76 struct fld_cache *lsf_cache;
78 /** Protect index modifications */
79 struct mutex lsf_lock;
81 /** Fld service name in form "fld-srv-lustre-MDTXXX" */
82 char lsf_name[LUSTRE_MDT_MAXNAMELEN];
86 struct lu_client_fld {
87 /** Client side debugfs entry. */
88 struct dentry *lcf_debugfs_entry;
90 /** List of exports client FLD knows about. */
91 struct list_head lcf_targets;
93 /** Current hash to be used to chose an export. */
94 struct lu_fld_hash *lcf_hash;
99 /** Lock protecting exports list and fld_hash. */
102 /** Client FLD cache. */
103 struct fld_cache *lcf_cache;
105 /** Client fld debugfs entry name. */
106 char lcf_name[LUSTRE_MDT_MAXNAMELEN];
110 int fld_client_init(struct lu_client_fld *fld,
111 const char *prefix, int hash);
113 void fld_client_fini(struct lu_client_fld *fld);
115 void fld_client_flush(struct lu_client_fld *fld);
117 int fld_client_lookup(struct lu_client_fld *fld, u64 seq, u32 *mds,
118 __u32 flags, const struct lu_env *env);
120 int fld_client_create(struct lu_client_fld *fld,
121 struct lu_seq_range *range,
122 const struct lu_env *env);
124 int fld_client_delete(struct lu_client_fld *fld, u64 seq,
125 const struct lu_env *env);
127 int fld_client_add_target(struct lu_client_fld *fld,
128 struct lu_fld_target *tar);
130 int fld_client_del_target(struct lu_client_fld *fld,
133 void fld_client_debugfs_fini(struct lu_client_fld *fld);