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_fld.h>
64 #include "fld_internal.h"
66 const char fld_index_name[] = "fld";
67 EXPORT_SYMBOL(fld_index_name);
69 const struct dt_index_features fld_index_features = {
70 .dif_flags = DT_IND_UPDATE,
71 .dif_keysize_min = sizeof(seqno_t),
72 .dif_keysize_max = sizeof(seqno_t),
73 .dif_recsize_min = sizeof(mdsno_t),
74 .dif_recsize_max = sizeof(mdsno_t),
78 EXPORT_SYMBOL(fld_index_features);
81 * number of blocks to reserve for particular operations. Should be function of
82 * ... something. Stub for now.
85 FLD_TXN_INDEX_INSERT_CREDITS = 20,
86 FLD_TXN_INDEX_DELETE_CREDITS = 20,
89 extern struct lu_context_key fld_thread_key;
91 static struct dt_key *fld_key(const struct lu_env *env,
94 struct fld_thread_info *info;
97 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
98 LASSERT(info != NULL);
100 info->fti_key = cpu_to_be64(seq);
101 RETURN((void *)&info->fti_key);
104 static struct dt_rec *fld_rec(const struct lu_env *env,
107 struct fld_thread_info *info;
110 info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
111 LASSERT(info != NULL);
113 info->fti_rec = cpu_to_be64(mds);
114 RETURN((void *)&info->fti_rec);
117 int fld_index_create(struct lu_server_fld *fld,
118 const struct lu_env *env,
119 seqno_t seq, mdsno_t mds)
121 struct dt_object *dt_obj = fld->lsf_obj;
122 struct dt_device *dt_dev;
123 struct txn_param txn;
128 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
130 /* stub here, will fix it later */
131 txn_param_init(&txn, FLD_TXN_INDEX_INSERT_CREDITS);
133 th = dt_dev->dd_ops->dt_trans_start(env, dt_dev, &txn);
135 rc = dt_obj->do_index_ops->dio_insert(env, dt_obj,
139 dt_dev->dd_ops->dt_trans_stop(env, th);
145 int fld_index_delete(struct lu_server_fld *fld,
146 const struct lu_env *env,
149 struct dt_object *dt_obj = fld->lsf_obj;
150 struct dt_device *dt_dev;
151 struct txn_param txn;
156 dt_dev = lu2dt_dev(fld->lsf_obj->do_lu.lo_dev);
157 txn_param_init(&txn, FLD_TXN_INDEX_DELETE_CREDITS);
158 th = dt_dev->dd_ops->dt_trans_start(env, dt_dev, &txn);
160 rc = dt_obj->do_index_ops->dio_delete(env, dt_obj,
161 fld_key(env, seq), th,
163 dt_dev->dd_ops->dt_trans_stop(env, th);
169 int fld_index_lookup(struct lu_server_fld *fld,
170 const struct lu_env *env,
171 seqno_t seq, mdsno_t *mds)
173 struct dt_object *dt_obj = fld->lsf_obj;
174 struct dt_rec *rec = fld_rec(env, 0);
178 rc = dt_obj->do_index_ops->dio_lookup(env, dt_obj, rec,
179 fld_key(env, seq), BYPASS_CAPA);
181 *mds = be64_to_cpu(*(__u64 *)rec);
188 int fld_index_init(struct lu_server_fld *fld,
189 const struct lu_env *env,
190 struct dt_device *dt)
192 struct dt_object *dt_obj;
197 dt_obj = dt_store_open(env, dt, "", fld_index_name, &fid);
198 if (!IS_ERR(dt_obj)) {
199 fld->lsf_obj = dt_obj;
200 rc = dt_obj->do_ops->do_index_try(env, dt_obj,
201 &fld_index_features);
203 LASSERT(dt_obj->do_index_ops != NULL);
205 CERROR("%s: File \"%s\" is not an index!\n",
206 fld->lsf_name, fld_index_name);
208 CERROR("%s: Can't find \"%s\" obj %d\n",
209 fld->lsf_name, fld_index_name, (int)PTR_ERR(dt_obj));
210 rc = PTR_ERR(dt_obj);
216 void fld_index_fini(struct lu_server_fld *fld,
217 const struct lu_env *env)
220 if (fld->lsf_obj != NULL) {
221 if (!IS_ERR(fld->lsf_obj))
222 lu_object_put(env, &fld->lsf_obj->do_lu);