1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
31 * Copyright (c) 2011 Whamcloud, Inc.
34 * This file is part of Lustre, http://www.lustre.org/
35 * Lustre is a trademark of Sun Microsystems, Inc.
37 * lustre/fld/fld_internal.h
39 * Author: Yury Umanets <umka@clusterfs.com>
40 * Author: Tom WangDi <wangdi@clusterfs.com>
42 #ifndef __FLD_INTERNAL_H
43 #define __FLD_INTERNAL_H
45 #include <lustre/lustre_idl.h>
46 #include <dt_object.h>
48 #include <libcfs/libcfs.h>
49 #include <lustre_req_layout.h>
50 #include <lustre_fld.h>
53 LUSTRE_FLD_INIT = 1 << 0,
54 LUSTRE_FLD_RUN = 1 << 1
63 typedef int (*fld_hash_func_t) (struct lu_client_fld *, __u64);
65 typedef struct lu_fld_target *
66 (*fld_scan_func_t) (struct lu_client_fld *, __u64);
70 fld_hash_func_t fh_hash_func;
71 fld_scan_func_t fh_scan_func;
74 struct fld_cache_entry {
78 * fld cache entries are sorted on range->lsr_start field. */
79 struct lu_seq_range fce_range;
84 * Cache guard, protects fci_hash mostly because others immutable after
87 cfs_spinlock_t fci_lock;
90 * Cache shrink threshold */
94 * Prefered number of cached entries */
98 * Current number of cached entries. Protected by \a fci_lock */
102 * LRU list fld entries. */
106 * sorted fld entries. */
107 cfs_list_t fci_entries_head;
110 * Cache statistics. */
111 struct fld_stats fci_stat;
114 * Cache name used for debug and messages. */
125 /* 4M of FLD cache will not hurt client a lot. */
126 FLD_SERVER_CACHE_SIZE = (4 * 0x100000),
128 /* 1M of FLD cache will not hurt client a lot. */
129 FLD_CLIENT_CACHE_SIZE = (1 * 0x100000)
133 /* Cache threshold is 10 percent of size. */
134 FLD_SERVER_CACHE_THRESHOLD = 10,
136 /* Cache threshold is 10 percent of size. */
137 FLD_CLIENT_CACHE_THRESHOLD = 10
140 extern struct lu_fld_hash fld_hash[];
144 struct fld_thread_info {
145 struct req_capsule *fti_pill;
147 struct lu_seq_range fti_rec;
148 struct lu_seq_range fti_lrange;
149 struct lu_seq_range fti_irange;
153 struct thandle *fld_trans_create(struct lu_server_fld *fld,
154 const struct lu_env *env);
155 int fld_trans_start(struct lu_server_fld *fld,
156 const struct lu_env *env, struct thandle *th);
158 void fld_trans_stop(struct lu_server_fld *fld,
159 const struct lu_env *env, struct thandle* th);
161 int fld_index_init(struct lu_server_fld *fld,
162 const struct lu_env *env,
163 struct dt_device *dt);
165 void fld_index_fini(struct lu_server_fld *fld,
166 const struct lu_env *env);
168 int fld_index_create(struct lu_server_fld *fld,
169 const struct lu_env *env,
170 const struct lu_seq_range *range,
173 int fld_index_delete(struct lu_server_fld *fld,
174 const struct lu_env *env,
175 struct lu_seq_range *range,
178 int fld_index_lookup(struct lu_server_fld *fld,
179 const struct lu_env *env,
180 seqno_t seq, struct lu_seq_range *range);
182 int fld_client_rpc(struct obd_export *exp,
183 struct lu_seq_range *range, __u32 fld_op);
186 extern struct lprocfs_vars fld_server_proc_list[];
187 extern struct lprocfs_vars fld_client_proc_list[];
192 struct fld_cache *fld_cache_init(const char *name,
193 int cache_size, int cache_threshold);
195 void fld_cache_fini(struct fld_cache *cache);
197 void fld_cache_flush(struct fld_cache *cache);
199 void fld_cache_insert(struct fld_cache *cache,
200 const struct lu_seq_range *range);
202 void fld_cache_delete(struct fld_cache *cache,
203 const struct lu_seq_range *range);
205 int fld_cache_lookup(struct fld_cache *cache,
206 const seqno_t seq, struct lu_seq_range *range);
208 static inline const char *
209 fld_target_name(struct lu_fld_target *tar)
211 if (tar->ft_srv != NULL)
212 return tar->ft_srv->lsf_name;
214 return (const char *)tar->ft_exp->exp_obd->obd_name;
217 extern cfs_proc_dir_entry_t *fld_type_proc_dir;
219 #endif /* __FLD_INTERNAL_H */