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) 2011, 2012, Whamcloud, Inc.
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 rc = lu_env_init(&env, LCT_DT_THREAD);
83 res->lr_lvb_data = lvb;
84 res->lr_lvb_len = sizeof(*lvb);
86 info = ofd_info_init(&env, NULL);
87 ofd_fid_from_resid(&info->fti_fid, &res->lr_name);
88 fo = ofd_object_find(&env, ofd, &info->fti_fid);
90 GOTO(out, rc = PTR_ERR(fo));
92 rc = ofd_attr_get(&env, fo, &info->fti_attr);
96 lvb->lvb_size = info->fti_attr.la_size;
97 lvb->lvb_blocks = info->fti_attr.la_blocks;
98 lvb->lvb_mtime = info->fti_attr.la_mtime;
99 lvb->lvb_atime = info->fti_attr.la_atime;
100 lvb->lvb_ctime = info->fti_attr.la_ctime;
102 CDEBUG(D_DLMTRACE, "res: "LPX64" initial lvb size: "LPX64", "
103 "mtime: "LPX64", blocks: "LPX64"\n",
104 res->lr_name.name[0], lvb->lvb_size,
105 lvb->lvb_mtime, lvb->lvb_blocks);
109 ofd_object_put(&env, fo);
113 OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
114 /* Don't free lvb data on lookup error */
118 /* This will be called in two ways:
120 * r != NULL : called by the DLM itself after a glimpse callback
121 * r == NULL : called by the ofd after a disk write
123 * If 'increase_only' is true, don't allow values to move backwards.
125 static int ofd_lvbo_update(struct ldlm_resource *res,
126 struct ptlrpc_request *req, int increase_only)
128 struct ofd_device *ofd;
129 struct ofd_object *fo;
130 struct ofd_thread_info *info;
137 LASSERT(res != NULL);
139 ofd = ldlm_res_to_ns(res)->ns_lvbp;
140 LASSERT(ofd != NULL);
142 lvb = res->lr_lvb_data;
144 CERROR("%s: no lvb when running lvbo_update, res: "LPU64"!\n",
145 ofd_obd(ofd)->obd_name, res->lr_name.name[0]);
149 rc = lu_env_init(&env, LCT_DT_THREAD);
151 GOTO(out_unlock, rc);
153 info = ofd_info_init(&env, NULL);
154 /* Update the LVB from the network message */
156 struct ost_lvb *rpc_lvb;
159 if (req->rq_import != NULL)
160 lvb_type = imp_connect_lvb_type(req->rq_import);
162 lvb_type = exp_connect_lvb_type(req->rq_export);
165 struct ost_lvb_v1 *lvb_v1;
167 lvb_v1 = req_capsule_server_swab_get(&req->rq_pill,
168 &RMF_DLM_LVB, lustre_swab_ost_lvb_v1);
172 rpc_lvb = &info->fti_lvb;
173 memcpy(rpc_lvb, lvb_v1, sizeof *lvb_v1);
174 rpc_lvb->lvb_mtime_ns = 0;
175 rpc_lvb->lvb_atime_ns = 0;
176 rpc_lvb->lvb_ctime_ns = 0;
178 rpc_lvb = req_capsule_server_swab_get(&req->rq_pill,
180 lustre_swab_ost_lvb);
186 if (rpc_lvb->lvb_size > lvb->lvb_size || !increase_only) {
187 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size: "
188 LPU64" -> "LPU64"\n", res->lr_name.name[0],
189 lvb->lvb_size, rpc_lvb->lvb_size);
190 lvb->lvb_size = rpc_lvb->lvb_size;
192 if (rpc_lvb->lvb_mtime > lvb->lvb_mtime || !increase_only) {
193 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime: "
194 LPU64" -> "LPU64"\n", res->lr_name.name[0],
195 lvb->lvb_mtime, rpc_lvb->lvb_mtime);
196 lvb->lvb_mtime = rpc_lvb->lvb_mtime;
198 if (rpc_lvb->lvb_atime > lvb->lvb_atime || !increase_only) {
199 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime: "
200 LPU64" -> "LPU64"\n", res->lr_name.name[0],
201 lvb->lvb_atime, rpc_lvb->lvb_atime);
202 lvb->lvb_atime = rpc_lvb->lvb_atime;
204 if (rpc_lvb->lvb_ctime > lvb->lvb_ctime || !increase_only) {
205 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime: "
206 LPU64" -> "LPU64"\n", res->lr_name.name[0],
207 lvb->lvb_ctime, rpc_lvb->lvb_ctime);
208 lvb->lvb_ctime = rpc_lvb->lvb_ctime;
210 if (rpc_lvb->lvb_blocks > lvb->lvb_blocks || !increase_only) {
211 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb blocks: "
212 LPU64" -> "LPU64"\n", res->lr_name.name[0],
213 lvb->lvb_blocks, rpc_lvb->lvb_blocks);
214 lvb->lvb_blocks = rpc_lvb->lvb_blocks;
220 /* Update the LVB from the disk inode */
221 ofd_fid_from_resid(&info->fti_fid, &res->lr_name);
222 fo = ofd_object_find(&env, ofd, &info->fti_fid);
224 GOTO(out_env, rc = PTR_ERR(fo));
226 rc = ofd_attr_get(&env, fo, &info->fti_attr);
231 if (info->fti_attr.la_size > lvb->lvb_size || !increase_only) {
232 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size from disk: "
233 LPU64" -> %llu\n", res->lr_name.name[0],
234 lvb->lvb_size, info->fti_attr.la_size);
235 lvb->lvb_size = info->fti_attr.la_size;
238 if (info->fti_attr.la_mtime >lvb->lvb_mtime || !increase_only) {
239 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime from disk: "
240 LPU64" -> "LPU64"\n", res->lr_name.name[0],
241 lvb->lvb_mtime, info->fti_attr.la_mtime);
242 lvb->lvb_mtime = info->fti_attr.la_mtime;
244 if (info->fti_attr.la_atime >lvb->lvb_atime || !increase_only) {
245 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime from disk: "
246 LPU64" -> "LPU64"\n", res->lr_name.name[0],
247 lvb->lvb_atime, info->fti_attr.la_atime);
248 lvb->lvb_atime = info->fti_attr.la_atime;
250 if (info->fti_attr.la_ctime >lvb->lvb_ctime || !increase_only) {
251 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime from disk: "
252 LPU64" -> "LPU64"\n", res->lr_name.name[0],
253 lvb->lvb_ctime, info->fti_attr.la_ctime);
254 lvb->lvb_ctime = info->fti_attr.la_ctime;
256 if (info->fti_attr.la_blocks > lvb->lvb_blocks || !increase_only) {
257 CDEBUG(D_DLMTRACE,"res: "LPU64" updating lvb blocks from disk: "
258 LPU64" -> %llu\n", res->lr_name.name[0],
260 (unsigned long long)info->fti_attr.la_blocks);
261 lvb->lvb_blocks = info->fti_attr.la_blocks;
266 ofd_object_put(&env, fo);
273 static int ofd_lvbo_size(struct ldlm_lock *lock)
275 if (lock->l_export != NULL && exp_connect_lvb_type(lock->l_export))
276 return sizeof(struct ost_lvb);
278 return sizeof(struct ost_lvb_v1);
281 static int ofd_lvbo_fill(struct ldlm_lock *lock, void *buf, int buflen)
283 struct ldlm_resource *res = lock->l_resource;
284 int lvb_len = min_t(int, res->lr_lvb_len, buflen);
287 memcpy(buf, res->lr_lvb_data, lvb_len);
293 struct ldlm_valblock_ops ofd_lvbo = {
294 lvbo_init: ofd_lvbo_init,
295 lvbo_update: ofd_lvbo_update,
296 lvbo_free: ofd_lvbo_free,
297 lvbo_size: ofd_lvbo_size,
298 lvbo_fill: ofd_lvbo_fill