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7 * it under the terms of the GNU General Public License version 2 only,
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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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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, 2013, Intel Corporation.
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 "../include/lustre/lustre_idl.h"
45 #include "../include/dt_object.h"
47 #include "../../include/linux/libcfs/libcfs.h"
48 #include "../include/lustre_req_layout.h"
49 #include "../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 {
74 struct list_head fce_lru;
75 struct list_head fce_list;
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 * Preferred number of cached entries */
97 * Current number of cached entries. Protected by \a fci_lock */
101 * LRU list fld entries. */
102 struct list_head fci_lru;
105 * sorted fld entries. */
106 struct list_head fci_entries_head;
109 * Cache statistics. */
110 struct fld_stats fci_stat;
113 * Cache name used for debug and messages. */
114 char fci_name[LUSTRE_MDT_MAXNAMELEN];
115 unsigned int fci_no_shrink:1;
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[];
142 int fld_client_rpc(struct obd_export *exp,
143 struct lu_seq_range *range, __u32 fld_op);
145 #if defined(CONFIG_PROC_FS)
146 extern struct lprocfs_vars fld_client_proc_list[];
150 struct fld_cache *fld_cache_init(const char *name,
151 int cache_size, int cache_threshold);
153 void fld_cache_fini(struct fld_cache *cache);
155 void fld_cache_flush(struct fld_cache *cache);
157 int fld_cache_insert(struct fld_cache *cache,
158 const struct lu_seq_range *range);
160 struct fld_cache_entry
161 *fld_cache_entry_create(const struct lu_seq_range *range);
163 int fld_cache_insert_nolock(struct fld_cache *cache,
164 struct fld_cache_entry *f_new);
165 void fld_cache_delete(struct fld_cache *cache,
166 const struct lu_seq_range *range);
167 void fld_cache_delete_nolock(struct fld_cache *cache,
168 const struct lu_seq_range *range);
169 int fld_cache_lookup(struct fld_cache *cache,
170 const u64 seq, struct lu_seq_range *range);
172 struct fld_cache_entry*
173 fld_cache_entry_lookup(struct fld_cache *cache, struct lu_seq_range *range);
174 void fld_cache_entry_delete(struct fld_cache *cache,
175 struct fld_cache_entry *node);
176 void fld_dump_cache_entries(struct fld_cache *cache);
178 struct fld_cache_entry
179 *fld_cache_entry_lookup_nolock(struct fld_cache *cache,
180 struct lu_seq_range *range);
181 int fld_write_range(const struct lu_env *env, struct dt_object *dt,
182 const struct lu_seq_range *range, struct thandle *th);
184 static inline const char *
185 fld_target_name(struct lu_fld_target *tar)
187 if (tar->ft_srv != NULL)
188 return tar->ft_srv->lsf_name;
190 return (const char *)tar->ft_exp->exp_obd->obd_name;
193 #endif /* __FLD_INTERNAL_H */