4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
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).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * lustre/fid/fid_store.c
33 * Lustre Sequence Manager
35 * Author: Yury Umanets <umka@clusterfs.com>
38 #define DEBUG_SUBSYSTEM S_FID
40 #include <libcfs/libcfs.h>
41 #include <dt_object.h>
42 #include <obd_support.h>
43 #include <lustre_fid.h>
44 #include <lustre_fld.h>
45 #include "fid_internal.h"
47 static struct lu_buf *seq_store_buf(struct seq_thread_info *info)
52 buf->lb_buf = &info->sti_space;
53 buf->lb_len = sizeof(info->sti_space);
57 struct seq_update_callback {
58 struct dt_txn_commit_cb suc_cb;
59 struct lu_server_seq *suc_seq;
62 void seq_update_cb(struct lu_env *env, struct thandle *th,
63 struct dt_txn_commit_cb *cb, int err)
65 struct seq_update_callback *ccb;
67 ccb = container_of(cb, struct seq_update_callback, suc_cb);
69 LASSERT(ccb->suc_seq != NULL);
71 ccb->suc_seq->lss_need_sync = 0;
75 int seq_update_cb_add(struct thandle *th, struct lu_server_seq *seq)
77 struct seq_update_callback *ccb;
78 struct dt_txn_commit_cb *dcb;
86 seq->lss_need_sync = 1;
89 dcb->dcb_func = seq_update_cb;
90 INIT_LIST_HEAD(&dcb->dcb_linkage);
91 strlcpy(dcb->dcb_name, "seq_update_cb", sizeof(dcb->dcb_name));
93 rc = dt_trans_cb_add(th, dcb);
99 /* This function implies that caller takes care about locking. */
100 int seq_store_update(const struct lu_env *env, struct lu_server_seq *seq,
101 struct lu_seq_range *out, int sync)
103 struct dt_device *dt_dev = lu2dt_dev(seq->lss_obj->do_lu.lo_dev);
104 struct seq_thread_info *info;
109 if (dt_dev->dd_rdonly)
112 info = lu_context_key_get(&env->le_ctx, &seq_thread_key);
113 LASSERT(info != NULL);
115 th = dt_trans_create(env, dt_dev);
119 /* Store ranges in le format. */
120 range_cpu_to_le(&info->sti_space, &seq->lss_space);
122 rc = dt_declare_record_write(env, seq->lss_obj,
123 seq_store_buf(info), 0, th);
128 rc = fld_declare_server_create(env,
129 seq->lss_site->ss_server_fld,
135 rc = dt_trans_start_local(env, dt_dev, th);
139 rc = dt_record_write(env, seq->lss_obj, seq_store_buf(info), &pos, th);
141 CERROR("%s: Can't write space data, rc %d\n",
145 rc = fld_server_create(env, seq->lss_site->ss_server_fld, out,
148 CERROR("%s: Can't Update fld database, rc %d\n",
154 * next sequence update will need sync until this update is committed
155 * in case of sync operation this is not needed obviously
158 /* if callback can't be added then sync always */
159 sync = !!seq_update_cb_add(th, seq);
163 dt_trans_stop(env, dt_dev, th);
168 * This function implies that caller takes care about locking or locking is not
169 * needed (init time).
171 int seq_store_read(struct lu_server_seq *seq,
172 const struct lu_env *env)
174 struct seq_thread_info *info;
179 info = lu_context_key_get(&env->le_ctx, &seq_thread_key);
180 LASSERT(info != NULL);
182 rc = dt_read(env, seq->lss_obj, seq_store_buf(info), &pos);
184 if (rc == sizeof(info->sti_space)) {
185 range_le_to_cpu(&seq->lss_space, &info->sti_space);
186 CDEBUG(D_INFO, "%s: Space - "DRANGE"\n",
187 seq->lss_name, PRANGE(&seq->lss_space));
189 } else if (rc == 0) {
192 CERROR("%s: Read only %d bytes of %d\n", seq->lss_name,
193 rc, (int)sizeof(info->sti_space));
200 int seq_store_init(struct lu_server_seq *seq,
201 const struct lu_env *env,
202 struct dt_device *dt)
204 struct dt_object *dt_obj;
207 struct dt_object_format dof;
212 name = seq->lss_type == LUSTRE_SEQ_SERVER ?
213 LUSTRE_SEQ_SRV_NAME : LUSTRE_SEQ_CTL_NAME;
215 if (seq->lss_type == LUSTRE_SEQ_SERVER)
216 lu_local_obj_fid(&fid, FID_SEQ_SRV_OID);
218 lu_local_obj_fid(&fid, FID_SEQ_CTL_OID);
220 memset(&attr, 0, sizeof(attr));
221 attr.la_valid = LA_MODE;
222 attr.la_mode = S_IFREG | 0666;
223 dof.dof_type = DFT_REGULAR;
225 dt_obj = dt_find_or_create(env, dt, &fid, &dof, &attr);
226 if (!IS_ERR(dt_obj)) {
227 seq->lss_obj = dt_obj;
230 CERROR("%s: Can't find \"%s\" obj %d\n",
231 seq->lss_name, name, (int)PTR_ERR(dt_obj));
232 rc = PTR_ERR(dt_obj);
238 void seq_store_fini(struct lu_server_seq *seq, const struct lu_env *env)
243 if (!IS_ERR(seq->lss_obj))
244 dt_object_put(env, seq->lss_obj);