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,
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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).
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17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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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) 2012, Whamcloud, Inc.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/fld/fld_internal.h
38 * Author: Yury Umanets <umka@clusterfs.com>
39 * Author: Tom WangDi <wangdi@clusterfs.com>
41 #ifndef __FLD_INTERNAL_H
42 #define __FLD_INTERNAL_H
44 #include <lustre/lustre_idl.h>
45 #include <dt_object.h>
47 #include <libcfs/libcfs.h>
48 #include <lustre_req_layout.h>
49 #include <lustre_fld.h>
52 LUSTRE_FLD_INIT = 1 << 0,
53 LUSTRE_FLD_RUN = 1 << 1
62 typedef int (*fld_hash_func_t) (struct lu_client_fld *, __u64);
64 typedef struct lu_fld_target *
65 (*fld_scan_func_t) (struct lu_client_fld *, __u64);
69 fld_hash_func_t fh_hash_func;
70 fld_scan_func_t fh_scan_func;
73 struct fld_cache_entry {
77 * fld cache entries are sorted on range->lsr_start field. */
78 struct lu_seq_range fce_range;
83 * Cache guard, protects fci_hash mostly because others immutable after
89 * Cache shrink threshold */
93 * Prefered number of cached entries */
97 * Current number of cached entries. Protected by \a fci_lock */
101 * LRU list fld entries. */
105 * sorted fld entries. */
106 cfs_list_t fci_entries_head;
109 * Cache statistics. */
110 struct fld_stats fci_stat;
113 * Cache name used for debug and messages. */
124 /* 4M of FLD cache will not hurt client a lot. */
125 FLD_SERVER_CACHE_SIZE = (4 * 0x100000),
127 /* 1M of FLD cache will not hurt client a lot. */
128 FLD_CLIENT_CACHE_SIZE = (1 * 0x100000)
132 /* Cache threshold is 10 percent of size. */
133 FLD_SERVER_CACHE_THRESHOLD = 10,
135 /* Cache threshold is 10 percent of size. */
136 FLD_CLIENT_CACHE_THRESHOLD = 10
139 extern struct lu_fld_hash fld_hash[];
143 struct fld_thread_info {
144 struct req_capsule *fti_pill;
146 struct lu_seq_range fti_rec;
147 struct lu_seq_range fti_lrange;
148 struct lu_seq_range fti_irange;
151 extern struct lu_context_key fld_thread_key;
153 int fld_index_init(struct lu_server_fld *fld,
154 const struct lu_env *env,
155 struct dt_device *dt);
157 void fld_index_fini(struct lu_server_fld *fld,
158 const struct lu_env *env);
160 int fld_index_create(struct lu_server_fld *fld,
161 const struct lu_env *env,
162 const struct lu_seq_range *range,
165 int fld_index_delete(struct lu_server_fld *fld,
166 const struct lu_env *env,
167 struct lu_seq_range *range,
170 int fld_index_lookup(struct lu_server_fld *fld,
171 const struct lu_env *env,
172 seqno_t seq, struct lu_seq_range *range);
174 int fld_client_rpc(struct obd_export *exp,
175 struct lu_seq_range *range, __u32 fld_op);
178 extern struct lprocfs_vars fld_server_proc_list[];
179 extern struct lprocfs_vars fld_client_proc_list[];
184 struct fld_cache *fld_cache_init(const char *name,
185 int cache_size, int cache_threshold);
187 void fld_cache_fini(struct fld_cache *cache);
189 void fld_cache_flush(struct fld_cache *cache);
191 void fld_cache_insert(struct fld_cache *cache,
192 const struct lu_seq_range *range);
194 void fld_cache_delete(struct fld_cache *cache,
195 const struct lu_seq_range *range);
197 int fld_cache_lookup(struct fld_cache *cache,
198 const seqno_t seq, struct lu_seq_range *range);
200 static inline const char *
201 fld_target_name(struct lu_fld_target *tar)
203 if (tar->ft_srv != NULL)
204 return tar->ft_srv->lsf_name;
206 return (const char *)tar->ft_exp->exp_obd->obd_name;
209 extern cfs_proc_dir_entry_t *fld_type_proc_dir;
210 extern struct file_operations fld_proc_seq_fops;
211 #endif /* __FLD_INTERNAL_H */