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 [sun.com URL with a
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 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/include/lustre_fid.h
38 * Author: Yury Umanets <umka@clusterfs.com>
47 #include <lustre/lustre_idl.h>
48 #include <lustre_req_layout.h>
49 #include <lustre_mdt.h>
51 #include <libcfs/libcfs.h>
56 /* Whole sequences space range and zero range definitions */
57 extern const struct lu_range LUSTRE_SEQ_SPACE_RANGE;
58 extern const struct lu_range LUSTRE_SEQ_ZERO_RANGE;
59 extern const struct lu_fid LUSTRE_BFL_FID;
63 * This is how may FIDs may be allocated in one sequence. 16384 for
66 LUSTRE_SEQ_MAX_WIDTH = 0x0000000000004000ULL,
69 * How many sequences may be allocate for meta-sequence (this is 128
72 /* changed to 16 to avoid overflow in test11 */
73 LUSTRE_SEQ_META_WIDTH = 0x0000000000000010ULL,
76 * This is how many sequences may be in one super-sequence allocated to
79 LUSTRE_SEQ_SUPER_WIDTH = (LUSTRE_SEQ_META_WIDTH * LUSTRE_SEQ_META_WIDTH)
94 /* Client sequence manager interface. */
95 struct lu_client_seq {
96 /* Sequence-controller export. */
97 struct obd_export *lcs_exp;
98 struct semaphore lcs_sem;
101 * Range of allowed for allocation sequeces. When using lu_client_seq on
102 * clients, this contains meta-sequence range. And for servers this
103 * contains super-sequence range.
105 struct lu_range lcs_space;
107 /* Seq related proc */
108 cfs_proc_dir_entry_t *lcs_proc_dir;
110 /* This holds last allocated fid in last obtained seq */
111 struct lu_fid lcs_fid;
113 /* LUSTRE_SEQ_METADATA or LUSTRE_SEQ_DATA */
114 enum lu_cli_type lcs_type;
117 * Service uuid, passed from MDT + seq name to form unique seq name to
118 * use it with procfs.
123 * Sequence width, that is how many objects may be allocated in one
124 * sequence. Default value for it is LUSTRE_SEQ_MAX_WIDTH.
128 /* Seq-server for direct talking */
129 struct lu_server_seq *lcs_srv;
132 /* server sequence manager interface */
133 struct lu_server_seq {
134 /* Available sequences space */
135 struct lu_range lss_space;
138 * Device for server side seq manager needs (saving sequences to backing
141 struct dt_device *lss_dev;
143 /* /seq file object device */
144 struct dt_object *lss_obj;
146 /* Seq related proc */
147 cfs_proc_dir_entry_t *lss_proc_dir;
149 /* LUSTRE_SEQ_SERVER or LUSTRE_SEQ_CONTROLLER */
150 enum lu_mgr_type lss_type;
152 /* Client interafce to request controller */
153 struct lu_client_seq *lss_cli;
155 /* Semaphore for protecting allocation */
156 struct semaphore lss_sem;
159 * Service uuid, passed from MDT + seq name to form unique seq name to
160 * use it with procfs.
165 * Allocation chunks for super and meta sequences. Default values are
166 * LUSTRE_SEQ_SUPER_WIDTH and LUSTRE_SEQ_META_WIDTH.
171 int seq_query(struct com_thread_info *info);
174 int seq_server_init(struct lu_server_seq *seq,
175 struct dt_device *dev,
177 enum lu_mgr_type type,
178 const struct lu_env *env);
180 void seq_server_fini(struct lu_server_seq *seq,
181 const struct lu_env *env);
183 int seq_server_alloc_super(struct lu_server_seq *seq,
185 struct lu_range *out,
186 const struct lu_env *env);
188 int seq_server_alloc_meta(struct lu_server_seq *seq,
190 struct lu_range *out,
191 const struct lu_env *env);
193 int seq_server_set_cli(struct lu_server_seq *seq,
194 struct lu_client_seq *cli,
195 const struct lu_env *env);
198 int seq_client_init(struct lu_client_seq *seq,
199 struct obd_export *exp,
200 enum lu_cli_type type,
202 struct lu_server_seq *srv);
204 void seq_client_fini(struct lu_client_seq *seq);
206 void seq_client_flush(struct lu_client_seq *seq);
208 int seq_client_alloc_fid(struct lu_client_seq *seq,
211 /* Fids common stuff */
212 int fid_is_local(struct lu_site *site, const struct lu_fid *fid);
216 struct ldlm_namespace;
219 LUSTRE_RES_ID_SEQ_OFF = 0,
220 LUSTRE_RES_ID_OID_OFF = 1,
221 LUSTRE_RES_ID_VER_OFF = 2,
222 LUSTRE_RES_ID_HSH_OFF = 3
226 * Build (DLM) resource name from fid.
228 static inline struct ldlm_res_id *
229 fid_build_reg_res_name(const struct lu_fid *f,
230 struct ldlm_res_id *name)
232 memset(name, 0, sizeof *name);
233 name->name[LUSTRE_RES_ID_SEQ_OFF] = fid_seq(f);
234 name->name[LUSTRE_RES_ID_OID_OFF] = fid_oid(f);
235 name->name[LUSTRE_RES_ID_VER_OFF] = fid_ver(f);
240 * Return true if resource is for object identified by fid.
242 static inline int fid_res_name_eq(const struct lu_fid *f,
243 const struct ldlm_res_id *name)
246 name->name[LUSTRE_RES_ID_SEQ_OFF] == fid_seq(f) &&
247 name->name[LUSTRE_RES_ID_OID_OFF] == fid_oid(f) &&
248 name->name[LUSTRE_RES_ID_VER_OFF] == fid_ver(f);
252 static inline struct ldlm_res_id *
253 fid_build_pdo_res_name(const struct lu_fid *f,
255 struct ldlm_res_id *name)
257 fid_build_reg_res_name(f, name);
258 name->name[LUSTRE_RES_ID_HSH_OFF] = hash;
262 static inline __u64 fid_flatten(const struct lu_fid *fid)
264 return (fid_seq(fid) - 1) * LUSTRE_SEQ_MAX_WIDTH + fid_oid(fid);
267 #define LUSTRE_SEQ_SRV_NAME "seq_srv"
268 #define LUSTRE_SEQ_CTL_NAME "seq_ctl"
270 /* Range common stuff */
271 void range_cpu_to_le(struct lu_range *dst, const struct lu_range *src);
272 void range_cpu_to_be(struct lu_range *dst, const struct lu_range *src);
273 void range_le_to_cpu(struct lu_range *dst, const struct lu_range *src);
274 void range_be_to_cpu(struct lu_range *dst, const struct lu_range *src);
276 #endif /* __LINUX_FID_H */