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 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/fld/fld_index.c
38 * Author: WangDi <wangdi@clusterfs.com>
39 * Author: Yury Umanets <umka@clusterfs.com>
42 # define EXPORT_SYMTAB
44 #define DEBUG_SUBSYSTEM S_FLD
47 # include <libcfs/libcfs.h>
48 # include <linux/module.h>
49 # include <linux/jbd.h>
50 #else /* __KERNEL__ */
51 # include <liblustre.h>
55 #include <obd_class.h>
56 #include <lustre_ver.h>
57 #include <obd_support.h>
58 #include <lprocfs_status.h>
60 #include <dt_object.h>
61 #include <md_object.h>
62 #include <lustre_mdc.h>
63 #include <lustre_fid.h>
64 #include <lustre_fld.h>
65 #include "fld_internal.h"
67 const char fld_index_name[] = "fld";
69 static const struct lu_seq_range IGIF_FLD_RANGE = {
71 .lsr_end = IDIF_SEQ_START,
75 const struct dt_index_features fld_index_features = {
76 .dif_flags = DT_IND_UPDATE,
77 .dif_keysize_min = sizeof(seqno_t),
78 .dif_keysize_max = sizeof(seqno_t),
79 .dif_recsize_min = sizeof(struct lu_seq_range),
80 .dif_recsize_max = sizeof(struct lu_seq_range),
84 extern struct lu_context_key fld_thread_key;
86 static struct dt_key *fld_key(const struct lu_env *env,
89 struct fld_thread_info *info;
92 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
93 LASSERT(info != NULL);
95 info->fti_key = cpu_to_be64(seq);
96 RETURN((void *)&info->fti_key);
99 static struct dt_rec *fld_rec(const struct lu_env *env,
100 const struct lu_seq_range *range)
102 struct fld_thread_info *info;
103 struct lu_seq_range *rec;
106 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
107 LASSERT(info != NULL);
108 rec = &info->fti_rec;
110 range_cpu_to_be(rec, range);
114 struct thandle* fld_trans_start(struct lu_server_fld *fld,
115 const struct lu_env *env, int credit)
117 struct fld_thread_info *info;
118 struct dt_device *dt_dev;
121 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
122 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
123 p = &info->fti_txn_param;
124 txn_param_init(p, credit);
126 return dt_dev->dd_ops->dt_trans_start(env, dt_dev, p);
129 void fld_trans_stop(struct lu_server_fld *fld,
130 const struct lu_env *env, struct thandle* th)
132 struct dt_device *dt_dev;
134 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
135 dt_dev->dd_ops->dt_trans_stop(env, th);
139 * insert range in fld store.
141 * \param range range to be inserted
142 * \param th transaction for this operation as it could compound
149 int fld_index_create(struct lu_server_fld *fld,
150 const struct lu_env *env,
151 const struct lu_seq_range *range,
154 struct dt_object *dt_obj = fld->lsf_obj;
155 struct dt_device *dt_dev;
161 start = range->lsr_start;
162 LASSERT(range_is_sane(range));
163 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
165 rc = dt_obj->do_index_ops->dio_insert(env, dt_obj,
170 CDEBUG(D_INFO, "%s: insert given range : "DRANGE" rc = %d\n",
171 fld->lsf_name, PRANGE(range), rc);
176 * delete range in fld store.
178 * \param range range to be deleted
179 * \param th transaction
185 int fld_index_delete(struct lu_server_fld *fld,
186 const struct lu_env *env,
187 struct lu_seq_range *range,
190 struct dt_object *dt_obj = fld->lsf_obj;
191 struct dt_device *dt_dev;
192 seqno_t seq = range->lsr_start;
197 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
198 rc = dt_obj->do_index_ops->dio_delete(env, dt_obj,
199 fld_key(env, seq), th,
202 CDEBUG(D_INFO, "%s: delete given range : "DRANGE" rc = %d\n",
203 fld->lsf_name, PRANGE(range), rc);
209 * lookup range for a seq passed
211 * \param seq seq for lookup.
212 * \param range result of lookup.
218 int fld_index_lookup(struct lu_server_fld *fld,
219 const struct lu_env *env,
221 struct lu_seq_range *range)
223 struct dt_object *dt_obj = fld->lsf_obj;
224 struct lu_seq_range *fld_rec;
225 struct dt_key *key = fld_key(env, seq);
226 struct fld_thread_info *info;
231 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
232 fld_rec = &info->fti_rec;
234 rc = dt_obj->do_index_ops->dio_lookup(env, dt_obj,
235 (struct dt_rec*) fld_rec,
239 range_be_to_cpu(fld_rec, fld_rec);
241 if (range_within(range, seq))
247 CDEBUG(D_INFO, "%s: lookup seq = "LPX64" range : "DRANGE" rc = %d\n",
248 fld->lsf_name, seq, PRANGE(range), rc);
253 static int fld_insert_igif_fld(struct lu_server_fld *fld,
254 const struct lu_env *env)
260 th = fld_trans_start(fld, env, FLD_TXN_INDEX_INSERT_CREDITS);
264 rc = fld_index_create(fld, env, &IGIF_FLD_RANGE, th);
265 fld_trans_stop(fld, env, th);
271 int fld_index_init(struct lu_server_fld *fld,
272 const struct lu_env *env,
273 struct dt_device *dt)
275 struct dt_object *dt_obj;
280 dt_obj = dt_store_open(env, dt, "", fld_index_name, &fid);
281 if (!IS_ERR(dt_obj)) {
282 fld->lsf_obj = dt_obj;
283 rc = dt_obj->do_ops->do_index_try(env, dt_obj,
284 &fld_index_features);
286 LASSERT(dt_obj->do_index_ops != NULL);
287 rc = fld_insert_igif_fld(fld, env);
290 CERROR("insert igif in fld! = %d\n", rc);
291 lu_object_put(env, &dt_obj->do_lu);
295 CERROR("%s: File \"%s\" is not an index!\n",
296 fld->lsf_name, fld_index_name);
300 CERROR("%s: Can't find \"%s\" obj %d\n",
301 fld->lsf_name, fld_index_name, (int)PTR_ERR(dt_obj));
302 rc = PTR_ERR(dt_obj);
308 void fld_index_fini(struct lu_server_fld *fld,
309 const struct lu_env *env)
312 if (fld->lsf_obj != NULL) {
313 if (!IS_ERR(fld->lsf_obj))
314 lu_object_put(env, &fld->lsf_obj->do_lu);