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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/ofd/ofd_lvb.c
38 * Author: Mikhail Pershin <tappro@whamcloud.com>
39 * Author: Alexey Zhuravlev <bzzz@whamcloud.com>
42 #define DEBUG_SUBSYSTEM S_FILTER
44 #include "ofd_internal.h"
46 static int ofd_lvbo_free(struct ldlm_resource *res)
49 OBD_FREE(res->lr_lvb_data, res->lr_lvb_len);
54 /* Called with res->lr_lvb_sem held */
55 static int ofd_lvbo_init(struct ldlm_resource *res)
57 struct ost_lvb *lvb = NULL;
58 struct ofd_device *ofd;
59 struct ofd_object *fo;
60 struct ofd_thread_info *info;
67 LASSERT_MUTEX_LOCKED(&res->lr_lvb_mutex);
69 if (res->lr_lvb_data != NULL)
72 ofd = ldlm_res_to_ns(res)->ns_lvbp;
75 if (OBD_FAIL_CHECK(OBD_FAIL_LDLM_OST_LVB))
78 rc = lu_env_init(&env, LCT_DT_THREAD);
84 GOTO(out, rc = -ENOMEM);
86 res->lr_lvb_data = lvb;
87 res->lr_lvb_len = sizeof(*lvb);
89 info = ofd_info_init(&env, NULL);
90 ost_fid_from_resid(&info->fti_fid, &res->lr_name);
91 fo = ofd_object_find(&env, ofd, &info->fti_fid);
93 GOTO(out, rc = PTR_ERR(fo));
95 rc = ofd_attr_get(&env, fo, &info->fti_attr);
99 lvb->lvb_size = info->fti_attr.la_size;
100 lvb->lvb_blocks = info->fti_attr.la_blocks;
101 lvb->lvb_mtime = info->fti_attr.la_mtime;
102 lvb->lvb_atime = info->fti_attr.la_atime;
103 lvb->lvb_ctime = info->fti_attr.la_ctime;
105 CDEBUG(D_DLMTRACE, "res: "LPX64" initial lvb size: "LPX64", "
106 "mtime: "LPX64", blocks: "LPX64"\n",
107 res->lr_name.name[0], lvb->lvb_size,
108 lvb->lvb_mtime, lvb->lvb_blocks);
112 ofd_object_put(&env, fo);
115 if (rc && lvb != NULL)
116 OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
117 /* Don't free lvb data on lookup error */
121 /* This will be called in two ways:
123 * r != NULL : called by the DLM itself after a glimpse callback
124 * r == NULL : called by the ofd after a disk write
126 * If 'increase_only' is true, don't allow values to move backwards.
128 static int ofd_lvbo_update(struct ldlm_resource *res,
129 struct ptlrpc_request *req, int increase_only)
131 struct ofd_device *ofd;
132 struct ofd_object *fo;
133 struct ofd_thread_info *info;
140 LASSERT(res != NULL);
142 ofd = ldlm_res_to_ns(res)->ns_lvbp;
143 LASSERT(ofd != NULL);
145 lvb = res->lr_lvb_data;
147 CERROR("%s: no lvb when running lvbo_update, res: "LPU64"!\n",
148 ofd_obd(ofd)->obd_name, res->lr_name.name[0]);
152 rc = lu_env_init(&env, LCT_DT_THREAD);
154 GOTO(out_unlock, rc);
156 info = ofd_info_init(&env, NULL);
157 /* Update the LVB from the network message */
159 struct ost_lvb *rpc_lvb;
162 if (req->rq_import != NULL)
163 lvb_type = imp_connect_lvb_type(req->rq_import);
165 lvb_type = exp_connect_lvb_type(req->rq_export);
168 struct ost_lvb_v1 *lvb_v1;
170 lvb_v1 = req_capsule_server_swab_get(&req->rq_pill,
171 &RMF_DLM_LVB, lustre_swab_ost_lvb_v1);
175 rpc_lvb = &info->fti_lvb;
176 memcpy(rpc_lvb, lvb_v1, sizeof *lvb_v1);
177 rpc_lvb->lvb_mtime_ns = 0;
178 rpc_lvb->lvb_atime_ns = 0;
179 rpc_lvb->lvb_ctime_ns = 0;
181 rpc_lvb = req_capsule_server_swab_get(&req->rq_pill,
183 lustre_swab_ost_lvb);
189 if (rpc_lvb->lvb_size > lvb->lvb_size || !increase_only) {
190 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size: "
191 LPU64" -> "LPU64"\n", res->lr_name.name[0],
192 lvb->lvb_size, rpc_lvb->lvb_size);
193 lvb->lvb_size = rpc_lvb->lvb_size;
195 if (rpc_lvb->lvb_mtime > lvb->lvb_mtime || !increase_only) {
196 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime: "
197 LPU64" -> "LPU64"\n", res->lr_name.name[0],
198 lvb->lvb_mtime, rpc_lvb->lvb_mtime);
199 lvb->lvb_mtime = rpc_lvb->lvb_mtime;
201 if (rpc_lvb->lvb_atime > lvb->lvb_atime || !increase_only) {
202 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime: "
203 LPU64" -> "LPU64"\n", res->lr_name.name[0],
204 lvb->lvb_atime, rpc_lvb->lvb_atime);
205 lvb->lvb_atime = rpc_lvb->lvb_atime;
207 if (rpc_lvb->lvb_ctime > lvb->lvb_ctime || !increase_only) {
208 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime: "
209 LPU64" -> "LPU64"\n", res->lr_name.name[0],
210 lvb->lvb_ctime, rpc_lvb->lvb_ctime);
211 lvb->lvb_ctime = rpc_lvb->lvb_ctime;
213 if (rpc_lvb->lvb_blocks > lvb->lvb_blocks || !increase_only) {
214 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb blocks: "
215 LPU64" -> "LPU64"\n", res->lr_name.name[0],
216 lvb->lvb_blocks, rpc_lvb->lvb_blocks);
217 lvb->lvb_blocks = rpc_lvb->lvb_blocks;
223 /* Update the LVB from the disk inode */
224 ost_fid_from_resid(&info->fti_fid, &res->lr_name);
225 fo = ofd_object_find(&env, ofd, &info->fti_fid);
227 GOTO(out_env, rc = PTR_ERR(fo));
229 rc = ofd_attr_get(&env, fo, &info->fti_attr);
234 if (info->fti_attr.la_size > lvb->lvb_size || !increase_only) {
235 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size from disk: "
236 LPU64" -> %llu\n", res->lr_name.name[0],
237 lvb->lvb_size, info->fti_attr.la_size);
238 lvb->lvb_size = info->fti_attr.la_size;
241 if (info->fti_attr.la_mtime >lvb->lvb_mtime || !increase_only) {
242 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime from disk: "
243 LPU64" -> "LPU64"\n", res->lr_name.name[0],
244 lvb->lvb_mtime, info->fti_attr.la_mtime);
245 lvb->lvb_mtime = info->fti_attr.la_mtime;
247 if (info->fti_attr.la_atime >lvb->lvb_atime || !increase_only) {
248 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime from disk: "
249 LPU64" -> "LPU64"\n", res->lr_name.name[0],
250 lvb->lvb_atime, info->fti_attr.la_atime);
251 lvb->lvb_atime = info->fti_attr.la_atime;
253 if (info->fti_attr.la_ctime >lvb->lvb_ctime || !increase_only) {
254 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime from disk: "
255 LPU64" -> "LPU64"\n", res->lr_name.name[0],
256 lvb->lvb_ctime, info->fti_attr.la_ctime);
257 lvb->lvb_ctime = info->fti_attr.la_ctime;
259 if (info->fti_attr.la_blocks > lvb->lvb_blocks || !increase_only) {
260 CDEBUG(D_DLMTRACE,"res: "LPU64" updating lvb blocks from disk: "
261 LPU64" -> %llu\n", res->lr_name.name[0],
263 (unsigned long long)info->fti_attr.la_blocks);
264 lvb->lvb_blocks = info->fti_attr.la_blocks;
269 ofd_object_put(&env, fo);
276 static int ofd_lvbo_size(struct ldlm_lock *lock)
278 if (lock->l_export != NULL && exp_connect_lvb_type(lock->l_export))
279 return sizeof(struct ost_lvb);
281 return sizeof(struct ost_lvb_v1);
284 static int ofd_lvbo_fill(struct ldlm_lock *lock, void *buf, int buflen)
286 struct ldlm_resource *res = lock->l_resource;
289 /* Former lvbo_init not allocate the "LVB". */
290 if (unlikely(res->lr_lvb_len == 0))
293 lvb_len = ofd_lvbo_size(lock);
294 LASSERT(lvb_len <= res->lr_lvb_len);
296 if (lvb_len > buflen)
300 memcpy(buf, res->lr_lvb_data, lvb_len);
306 struct ldlm_valblock_ops ofd_lvbo = {
307 lvbo_init: ofd_lvbo_init,
308 lvbo_update: ofd_lvbo_update,
309 lvbo_free: ofd_lvbo_free,
310 lvbo_size: ofd_lvbo_size,
311 lvbo_fill: ofd_lvbo_fill