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/obdfilter/filter_lvb.c
38 * Author: Peter Braam <braam@clusterfs.com>
39 * Author: Andreas Dilger <adilger@clusterfs.com>
40 * Author: Phil Schwan <phil@clusterfs.com>
43 #define DEBUG_SUBSYSTEM S_FILTER
45 #ifndef AUTOCONF_INCLUDED
46 #include <linux/config.h>
48 #include <linux/module.h>
49 #include <linux/version.h>
51 #include <libcfs/list.h>
52 #include <obd_class.h>
53 #include <lustre_dlm.h>
55 #include "filter_internal.h"
57 /* Called with res->lr_lvb_sem held */
58 static int filter_lvbo_init(struct ldlm_resource *res)
60 struct ost_lvb *lvb = NULL;
61 struct obd_device *obd;
62 struct dentry *dentry;
67 LASSERT_SEM_LOCKED(&res->lr_lvb_sem);
72 OBD_ALLOC(lvb, sizeof(*lvb));
76 res->lr_lvb_data = lvb;
77 res->lr_lvb_len = sizeof(*lvb);
79 obd = res->lr_namespace->ns_lvbp;
82 CDEBUG(D_INODE, "%s: filter_lvbo_init(o_gr="LPU64", o_id="
83 LPU64")\n", obd->obd_name, res->lr_name.name[1],
84 res->lr_name.name[0]);
86 dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
87 res->lr_name.name[0]);
90 CERROR("%s: bad object "LPU64"/"LPU64": rc %d\n", obd->obd_name,
91 res->lr_name.name[0], res->lr_name.name[1], rc);
95 if (dentry->d_inode == NULL)
96 /* This is always true for test_brw */
97 GOTO(out_dentry, rc = -ENOENT);
99 inode_init_lvb(dentry->d_inode, lvb);
101 CDEBUG(D_DLMTRACE, "res: "LPX64" initial lvb size: "LPX64", "
102 "mtime: "LPX64", blocks: "LPX64"\n",
103 res->lr_name.name[0], lvb->lvb_size,
104 lvb->lvb_mtime, lvb->lvb_blocks);
111 OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
112 /* Don't free lvb data on lookup error */
116 /* This will be called in two ways:
118 * m != NULL : called by the DLM itself after a glimpse callback
119 * m == NULL : called by the filter after a disk write
121 * If 'increase_only' is true, don't allow values to move backwards.
123 static int filter_lvbo_update(struct ldlm_resource *res, struct lustre_msg *m,
124 int buf_idx, int increase_only)
128 struct obd_device *obd;
129 struct dentry *dentry;
134 down(&res->lr_lvb_sem);
135 lvb = res->lr_lvb_data;
137 CERROR("No lvb when running lvbo_update!\n");
141 /* Update the LVB from the network message */
145 new = lustre_swab_buf(m, buf_idx, sizeof(*new),
146 lustre_swab_ost_lvb);
148 CERROR("lustre_swab_buf failed\n");
151 if (new->lvb_size > lvb->lvb_size || !increase_only) {
152 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size: "
153 LPU64" -> "LPU64"\n", res->lr_name.name[0],
154 lvb->lvb_size, new->lvb_size);
155 lvb->lvb_size = new->lvb_size;
157 if (new->lvb_mtime > lvb->lvb_mtime || !increase_only) {
158 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime: "
159 LPU64" -> "LPU64"\n", res->lr_name.name[0],
160 lvb->lvb_mtime, new->lvb_mtime);
161 lvb->lvb_mtime = new->lvb_mtime;
163 if (new->lvb_atime > lvb->lvb_atime || !increase_only) {
164 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime: "
165 LPU64" -> "LPU64"\n", res->lr_name.name[0],
166 lvb->lvb_atime, new->lvb_atime);
167 lvb->lvb_atime = new->lvb_atime;
169 if (new->lvb_ctime > lvb->lvb_ctime || !increase_only) {
170 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime: "
171 LPU64" -> "LPU64"\n", res->lr_name.name[0],
172 lvb->lvb_ctime, new->lvb_ctime);
173 lvb->lvb_ctime = new->lvb_ctime;
178 /* Update the LVB from the disk inode */
179 obd = res->lr_namespace->ns_lvbp;
182 dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
183 res->lr_name.name[0]);
185 GOTO(out, rc = PTR_ERR(dentry));
187 if (dentry->d_inode == NULL)
188 GOTO(out_dentry, rc = -ENOENT);
190 if (i_size_read(dentry->d_inode) > lvb->lvb_size || !increase_only) {
191 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size from disk: "
192 LPU64" -> %llu\n", res->lr_name.name[0],
193 lvb->lvb_size, i_size_read(dentry->d_inode));
194 lvb->lvb_size = i_size_read(dentry->d_inode);
197 if (LTIME_S(dentry->d_inode->i_mtime) >lvb->lvb_mtime|| !increase_only){
198 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime from disk: "
199 LPU64" -> %lu\n", res->lr_name.name[0],
200 lvb->lvb_mtime, LTIME_S(dentry->d_inode->i_mtime));
201 lvb->lvb_mtime = LTIME_S(dentry->d_inode->i_mtime);
203 if (LTIME_S(dentry->d_inode->i_atime) >lvb->lvb_atime|| !increase_only){
204 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime from disk: "
205 LPU64" -> %lu\n", res->lr_name.name[0],
206 lvb->lvb_atime, LTIME_S(dentry->d_inode->i_atime));
207 lvb->lvb_atime = LTIME_S(dentry->d_inode->i_atime);
209 if (LTIME_S(dentry->d_inode->i_ctime) >lvb->lvb_ctime|| !increase_only){
210 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime from disk: "
211 LPU64" -> %lu\n", res->lr_name.name[0],
212 lvb->lvb_ctime, LTIME_S(dentry->d_inode->i_ctime));
213 lvb->lvb_ctime = LTIME_S(dentry->d_inode->i_ctime);
215 if (lvb->lvb_blocks != dentry->d_inode->i_blocks) {
216 CDEBUG(D_DLMTRACE,"res: "LPU64" updating lvb blocks from disk: "
217 LPU64" -> %llu\n", res->lr_name.name[0],
218 lvb->lvb_blocks, (unsigned long long)dentry->d_inode->i_blocks);
219 lvb->lvb_blocks = dentry->d_inode->i_blocks;
226 up(&res->lr_lvb_sem);
230 struct ldlm_valblock_ops filter_lvbo = {
231 lvbo_init: filter_lvbo_init,
232 lvbo_update: filter_lvbo_update