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 (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * lustre/obdfilter/filter_lvb.c
40 * Author: Peter Braam <braam@clusterfs.com>
41 * Author: Andreas Dilger <adilger@clusterfs.com>
42 * Author: Phil Schwan <phil@clusterfs.com>
45 #define DEBUG_SUBSYSTEM S_FILTER
47 #ifndef AUTOCONF_INCLUDED
48 #include <linux/config.h>
50 #include <linux/module.h>
51 #include <linux/version.h>
53 #include <libcfs/list.h>
54 #include <obd_class.h>
55 #include <lustre_dlm.h>
57 #include "filter_internal.h"
59 static int filter_lvbo_free(struct ldlm_resource *res) {
60 if (res->lr_lvb_inode) {
61 iput(res->lr_lvb_inode);
62 res->lr_lvb_inode = NULL;
66 OBD_FREE(res->lr_lvb_data, res->lr_lvb_len);
71 /* Called with res->lr_lvb_sem held */
72 static int filter_lvbo_init(struct ldlm_resource *res)
74 struct ost_lvb *lvb = NULL;
75 struct obd_device *obd;
76 struct dentry *dentry;
81 LASSERT_SEM_LOCKED(&res->lr_lvb_sem);
86 OBD_ALLOC(lvb, sizeof(*lvb));
90 res->lr_lvb_data = lvb;
91 res->lr_lvb_len = sizeof(*lvb);
93 obd = ldlm_res_to_ns(res)->ns_lvbp;
96 CDEBUG(D_INODE, "%s: filter_lvbo_init(o_seq="LPU64", o_id="
97 LPU64")\n", obd->obd_name, res->lr_name.name[1],
98 res->lr_name.name[0]);
100 dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
101 res->lr_name.name[0]);
102 if (IS_ERR(dentry)) {
103 rc = PTR_ERR(dentry);
104 CERROR("%s: bad object "LPU64"/"LPU64": rc %d\n", obd->obd_name,
105 res->lr_name.name[0], res->lr_name.name[1], rc);
109 if (dentry->d_inode == NULL)
110 /* This is always true for test_brw */
111 GOTO(out_dentry, rc = -ENOENT);
113 inode_init_lvb(dentry->d_inode, lvb);
115 CDEBUG(D_DLMTRACE, "res: "LPX64" initial lvb size: "LPX64", "
116 "mtime: "LPX64", blocks: "LPX64"\n",
117 res->lr_name.name[0], lvb->lvb_size,
118 lvb->lvb_mtime, lvb->lvb_blocks);
120 res->lr_lvb_inode = igrab(dentry->d_inode);
127 OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
128 /* Don't free lvb data on lookup error */
132 /* This will be called in two ways:
134 * r != NULL : called by the DLM itself after a glimpse callback
135 * r == NULL : called by the filter after a disk write
137 * If 'increase_only' is true, don't allow values to move backwards.
139 static int filter_lvbo_update(struct ldlm_resource *res,
140 struct ptlrpc_request *r, int increase_only)
144 struct obd_device *obd;
146 struct inode *tmpinode = NULL;
152 lvb = res->lr_lvb_data;
154 CERROR("No lvb when running lvbo_update!\n");
158 /* Update the LVB from the network message */
162 /* XXX update always from reply buffer */
163 new = req_capsule_server_get(&r->rq_pill, &RMF_DLM_LVB);
166 CERROR("lustre_swab_buf failed\n");
169 if (new->lvb_size > lvb->lvb_size || !increase_only) {
170 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size: "
171 LPU64" -> "LPU64"\n", res->lr_name.name[0],
172 lvb->lvb_size, new->lvb_size);
173 lvb->lvb_size = new->lvb_size;
175 if (new->lvb_mtime > lvb->lvb_mtime || !increase_only) {
176 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime: "
177 LPU64" -> "LPU64"\n", res->lr_name.name[0],
178 lvb->lvb_mtime, new->lvb_mtime);
179 lvb->lvb_mtime = new->lvb_mtime;
181 if (new->lvb_atime > lvb->lvb_atime || !increase_only) {
182 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime: "
183 LPU64" -> "LPU64"\n", res->lr_name.name[0],
184 lvb->lvb_atime, new->lvb_atime);
185 lvb->lvb_atime = new->lvb_atime;
187 if (new->lvb_ctime > lvb->lvb_ctime || !increase_only) {
188 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime: "
189 LPU64" -> "LPU64"\n", res->lr_name.name[0],
190 lvb->lvb_ctime, new->lvb_ctime);
191 lvb->lvb_ctime = new->lvb_ctime;
193 if (new->lvb_blocks > lvb->lvb_blocks || !increase_only) {
194 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb blocks: "
195 LPU64" -> "LPU64"\n", res->lr_name.name[0],
196 lvb->lvb_blocks, new->lvb_blocks);
197 lvb->lvb_blocks = new->lvb_blocks;
202 /* Update the LVB from the disk inode */
203 obd = ldlm_res_to_ns(res)->ns_lvbp;
206 inode = res->lr_lvb_inode;
207 /* filter_fid2dentry could fail, esp. in OBD_FAIL_OST_ENOENT test case */
208 if (unlikely(inode == NULL)) {
209 struct dentry *dentry;
213 dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
214 res->lr_name.name[0]);
216 RETURN(PTR_ERR(dentry));
219 tmpinode = igrab(dentry->d_inode);
221 /* tmpinode could be NULL, but it does not matter if other
222 * have set res->lr_lvb_inode */
224 if (res->lr_lvb_inode == NULL) {
225 res->lr_lvb_inode = tmpinode;
228 inode = res->lr_lvb_inode;
231 if (!inode || !inode->i_nlink)
232 GOTO(out, rc = -ENOENT);
234 if (i_size_read(inode) > 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, i_size_read(inode));
238 lvb->lvb_size = i_size_read(inode);
241 if (LTIME_S(inode->i_mtime) >lvb->lvb_mtime|| !increase_only){
242 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime from disk: "
243 LPU64" -> %lu\n", res->lr_name.name[0],
244 lvb->lvb_mtime, LTIME_S(inode->i_mtime));
245 lvb->lvb_mtime = LTIME_S(inode->i_mtime);
247 if (LTIME_S(inode->i_atime) >lvb->lvb_atime|| !increase_only){
248 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime from disk: "
249 LPU64" -> %lu\n", res->lr_name.name[0],
250 lvb->lvb_atime, LTIME_S(inode->i_atime));
251 lvb->lvb_atime = LTIME_S(inode->i_atime);
253 if (LTIME_S(inode->i_ctime) >lvb->lvb_ctime|| !increase_only){
254 CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime from disk: "
255 LPU64" -> %lu\n", res->lr_name.name[0],
256 lvb->lvb_ctime, LTIME_S(inode->i_ctime));
257 lvb->lvb_ctime = LTIME_S(inode->i_ctime);
259 if (inode->i_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],
262 lvb->lvb_blocks, (unsigned long long)inode->i_blocks);
263 lvb->lvb_blocks = inode->i_blocks;
273 struct ldlm_valblock_ops filter_lvbo = {
274 lvbo_init: filter_lvbo_init,
275 lvbo_update: filter_lvbo_update,
276 lvbo_free: filter_lvbo_free