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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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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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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
45 #include <lustre/lustre_idl.h>
46 #include <libcfs/libcfs.h>
47 #include <lustre_fld.h>
50 LUSTRE_FLD_INIT = 1 << 0,
51 LUSTRE_FLD_RUN = 1 << 1
59 typedef int (*fld_hash_func_t) (struct lu_client_fld *, __u64);
61 typedef struct lu_fld_target *
62 (*fld_scan_func_t) (struct lu_client_fld *, __u64);
66 fld_hash_func_t fh_hash_func;
67 fld_scan_func_t fh_scan_func;
70 struct fld_cache_entry {
74 * fld cache entries are sorted on range->lsr_start field. */
75 struct lu_seq_range fce_range;
80 * Cache guard, protects fci_hash mostly because others immutable after
86 * Cache shrink threshold */
90 * Prefered number of cached entries */
94 * Current number of cached entries. Protected by \a fci_lock */
98 * LRU list fld entries. */
102 * sorted fld entries. */
103 cfs_list_t fci_entries_head;
106 * Cache statistics. */
107 struct fld_stats fci_stat;
110 * Cache name used for debug and messages. */
112 unsigned int fci_no_shrink:1;
122 /* 4M of FLD cache will not hurt client a lot. */
123 FLD_SERVER_CACHE_SIZE = (4 * 0x100000),
125 /* 1M of FLD cache will not hurt client a lot. */
126 FLD_CLIENT_CACHE_SIZE = (1 * 0x100000)
130 /* Cache threshold is 10 percent of size. */
131 FLD_SERVER_CACHE_THRESHOLD = 10,
133 /* Cache threshold is 10 percent of size. */
134 FLD_CLIENT_CACHE_THRESHOLD = 10
137 extern struct lu_fld_hash fld_hash[];
142 extern struct proc_dir_entry *fld_type_proc_dir;
143 extern struct lprocfs_vars fld_client_proc_list[];
146 # ifdef HAVE_SERVER_SUPPORT
147 struct fld_thread_info {
148 struct lu_seq_range fti_rec;
149 struct lu_seq_range fti_lrange;
150 struct lu_seq_range fti_irange;
153 extern struct lu_context_key fld_thread_key;
156 int fld_index_init(const struct lu_env *env, struct lu_server_fld *fld,
157 struct dt_device *dt);
159 void fld_index_fini(const struct lu_env *env, struct lu_server_fld *fld);
161 int fld_declare_index_create(const struct lu_env *env,
162 struct lu_server_fld *fld,
163 const struct lu_seq_range *new_range,
166 int fld_index_create(const struct lu_env *env, struct lu_server_fld *fld,
167 const struct lu_seq_range *new_range, struct thandle *th);
169 int fld_index_lookup(const struct lu_env *env, struct lu_server_fld *fld,
170 seqno_t seq, struct lu_seq_range *range);
172 int fld_server_mod_init(void);
174 void fld_server_mod_exit(void);
177 extern const struct file_operations fld_proc_seq_fops;
178 extern struct lprocfs_vars fld_server_proc_list[];
181 # endif /* HAVE_SERVER_SUPPORT */
183 int fld_client_rpc(struct obd_export *exp,
184 struct lu_seq_range *range, __u32 fld_op);
186 #endif /* __KERNEL__ */
188 struct fld_cache *fld_cache_init(const char *name,
189 int cache_size, int cache_threshold);
191 void fld_cache_fini(struct fld_cache *cache);
193 void fld_cache_flush(struct fld_cache *cache);
195 int fld_cache_insert(struct fld_cache *cache,
196 const struct lu_seq_range *range);
198 struct fld_cache_entry
199 *fld_cache_entry_create(const struct lu_seq_range *range);
201 int fld_cache_insert_nolock(struct fld_cache *cache,
202 struct fld_cache_entry *f_new);
203 void fld_cache_delete(struct fld_cache *cache,
204 const struct lu_seq_range *range);
205 void fld_cache_delete_nolock(struct fld_cache *cache,
206 const struct lu_seq_range *range);
207 int fld_cache_lookup(struct fld_cache *cache,
208 const seqno_t seq, struct lu_seq_range *range);
210 struct fld_cache_entry *
211 fld_cache_entry_lookup(struct fld_cache *cache,
212 const struct lu_seq_range *range);
214 void fld_cache_entry_delete(struct fld_cache *cache,
215 struct fld_cache_entry *node);
217 struct fld_cache_entry *
218 fld_cache_entry_lookup_nolock(struct fld_cache *cache,
219 const struct lu_seq_range *range);
221 static inline const char *
222 fld_target_name(const struct lu_fld_target *tar)
224 #ifdef HAVE_SERVER_SUPPORT
225 if (tar->ft_srv != NULL)
226 return tar->ft_srv->lsf_name;
229 return tar->ft_exp->exp_obd->obd_name;
232 #endif /* __FLD_INTERNAL_H */