+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, Whamcloud, Inc.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/obdfilter/filter_lvb.c
- *
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
- * Author: Phil Schwan <phil@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_FILTER
-
-#include <linux/module.h>
-#include <linux/version.h>
-
-#include <libcfs/list.h>
-#include <obd_class.h>
-#include <lustre_dlm.h>
-
-#include "filter_internal.h"
-
-static int filter_lvbo_free(struct ldlm_resource *res) {
- if (res->lr_lvb_inode) {
- iput(res->lr_lvb_inode);
- res->lr_lvb_inode = NULL;
- }
-
- if (res->lr_lvb_data)
- OBD_FREE(res->lr_lvb_data, res->lr_lvb_len);
-
- return 0;
-}
-
-/* Called with res->lr_lvb_mutex held */
-static int filter_lvbo_init(struct ldlm_resource *res)
-{
- struct ost_lvb *lvb = NULL;
- struct obd_device *obd;
- struct dentry *dentry;
- int rc = 0;
- ENTRY;
-
- LASSERT(res);
- LASSERT_MUTEX_LOCKED(&res->lr_lvb_mutex);
-
- if (res->lr_lvb_data)
- RETURN(0);
-
- OBD_ALLOC(lvb, sizeof(*lvb));
- if (lvb == NULL)
- RETURN(-ENOMEM);
-
- res->lr_lvb_data = lvb;
- res->lr_lvb_len = sizeof(*lvb);
-
- obd = ldlm_res_to_ns(res)->ns_lvbp;
- LASSERT(obd != NULL);
-
- CDEBUG(D_INODE, "%s: filter_lvbo_init(o_seq="LPU64", o_id="
- LPU64")\n", obd->obd_name, res->lr_name.name[1],
- res->lr_name.name[0]);
-
- dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
- res->lr_name.name[0]);
- if (IS_ERR(dentry)) {
- rc = PTR_ERR(dentry);
- CERROR("%s: bad object "LPU64"/"LPU64": rc %d\n", obd->obd_name,
- res->lr_name.name[0], res->lr_name.name[1], rc);
- RETURN(rc);
- }
-
- if (dentry->d_inode == NULL)
- /* This is always true for test_brw */
- GOTO(out_dentry, rc = -ENOENT);
-
- inode_init_lvb(dentry->d_inode, lvb);
-
- CDEBUG(D_DLMTRACE, "res: "LPX64" initial lvb size: "LPX64", "
- "mtime: "LPX64", blocks: "LPX64"\n",
- res->lr_name.name[0], lvb->lvb_size,
- lvb->lvb_mtime, lvb->lvb_blocks);
-
- res->lr_lvb_inode = igrab(dentry->d_inode);
-
- EXIT;
-out_dentry:
- f_dput(dentry);
-
- if (rc)
- OST_LVB_SET_ERR(lvb->lvb_blocks, rc);
- /* Don't free lvb data on lookup error */
- return rc;
-}
-
-/* This will be called in two ways:
- *
- * r != NULL : called by the DLM itself after a glimpse callback
- * r == NULL : called by the filter after a disk write
- *
- * If 'increase_only' is true, don't allow values to move backwards.
- */
-static int filter_lvbo_update(struct ldlm_resource *res,
- struct ptlrpc_request *r, int increase_only)
-{
- int rc = 0;
- struct ost_lvb *lvb;
- struct obd_device *obd;
- struct inode *inode;
- struct inode *tmpinode = NULL;
- ENTRY;
-
- LASSERT(res);
-
- lock_res(res);
- lvb = res->lr_lvb_data;
- if (lvb == NULL) {
- CERROR("No lvb when running lvbo_update!\n");
- GOTO(out, rc = 0);
- }
-
- /* Update the LVB from the network message */
- if (r != NULL) {
- struct ost_lvb *new;
-
- /* XXX update always from reply buffer */
- new = req_capsule_server_get(&r->rq_pill, &RMF_DLM_LVB);
-
- if (new == NULL) {
- CERROR("lustre_swab_buf failed\n");
- goto disk_update;
- }
- if (new->lvb_size > lvb->lvb_size || !increase_only) {
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size: "
- LPU64" -> "LPU64"\n", res->lr_name.name[0],
- lvb->lvb_size, new->lvb_size);
- lvb->lvb_size = new->lvb_size;
- }
- if (new->lvb_mtime > lvb->lvb_mtime || !increase_only) {
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime: "
- LPU64" -> "LPU64"\n", res->lr_name.name[0],
- lvb->lvb_mtime, new->lvb_mtime);
- lvb->lvb_mtime = new->lvb_mtime;
- }
- if (new->lvb_atime > lvb->lvb_atime || !increase_only) {
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime: "
- LPU64" -> "LPU64"\n", res->lr_name.name[0],
- lvb->lvb_atime, new->lvb_atime);
- lvb->lvb_atime = new->lvb_atime;
- }
- if (new->lvb_ctime > lvb->lvb_ctime || !increase_only) {
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime: "
- LPU64" -> "LPU64"\n", res->lr_name.name[0],
- lvb->lvb_ctime, new->lvb_ctime);
- lvb->lvb_ctime = new->lvb_ctime;
- }
- if (new->lvb_blocks > lvb->lvb_blocks || !increase_only) {
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb blocks: "
- LPU64" -> "LPU64"\n", res->lr_name.name[0],
- lvb->lvb_blocks, new->lvb_blocks);
- lvb->lvb_blocks = new->lvb_blocks;
- }
- }
-
- disk_update:
- /* Update the LVB from the disk inode */
- obd = ldlm_res_to_ns(res)->ns_lvbp;
- LASSERT(obd);
-
- inode = res->lr_lvb_inode;
- /* filter_fid2dentry could fail, esp. in OBD_FAIL_OST_ENOENT test case */
- if (unlikely(inode == NULL)) {
- struct dentry *dentry;
-
- unlock_res(res);
-
- dentry = filter_fid2dentry(obd, NULL, res->lr_name.name[1],
- res->lr_name.name[0]);
- if (IS_ERR(dentry))
- RETURN(PTR_ERR(dentry));
-
- if (dentry->d_inode)
- tmpinode = igrab(dentry->d_inode);
- f_dput(dentry);
- /* tmpinode could be NULL, but it does not matter if other
- * have set res->lr_lvb_inode */
- lock_res(res);
- if (res->lr_lvb_inode == NULL) {
- res->lr_lvb_inode = tmpinode;
- tmpinode = NULL;
- }
- inode = res->lr_lvb_inode;
- }
-
- if (!inode || !inode->i_nlink)
- GOTO(out, rc = -ENOENT);
-
- if (i_size_read(inode) > lvb->lvb_size || !increase_only) {
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb size from disk: "
- LPU64" -> %llu\n", res->lr_name.name[0],
- lvb->lvb_size, i_size_read(inode));
- lvb->lvb_size = i_size_read(inode);
- }
-
- if (LTIME_S(inode->i_mtime) >lvb->lvb_mtime|| !increase_only){
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb mtime from disk: "
- LPU64" -> %lu\n", res->lr_name.name[0],
- lvb->lvb_mtime, LTIME_S(inode->i_mtime));
- lvb->lvb_mtime = LTIME_S(inode->i_mtime);
- }
- if (LTIME_S(inode->i_atime) >lvb->lvb_atime|| !increase_only){
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb atime from disk: "
- LPU64" -> %lu\n", res->lr_name.name[0],
- lvb->lvb_atime, LTIME_S(inode->i_atime));
- lvb->lvb_atime = LTIME_S(inode->i_atime);
- }
- if (LTIME_S(inode->i_ctime) >lvb->lvb_ctime|| !increase_only){
- CDEBUG(D_DLMTRACE, "res: "LPU64" updating lvb ctime from disk: "
- LPU64" -> %lu\n", res->lr_name.name[0],
- lvb->lvb_ctime, LTIME_S(inode->i_ctime));
- lvb->lvb_ctime = LTIME_S(inode->i_ctime);
- }
- if (inode->i_blocks > lvb->lvb_blocks || !increase_only) {
- CDEBUG(D_DLMTRACE,"res: "LPU64" updating lvb blocks from disk: "
- LPU64" -> %llu\n", res->lr_name.name[0],
- lvb->lvb_blocks, (unsigned long long)inode->i_blocks);
- lvb->lvb_blocks = inode->i_blocks;
- }
-
-out:
- unlock_res(res);
- if (tmpinode)
- iput(tmpinode);
- return rc;
-}
-
-static int filter_lvbo_size(struct ldlm_lock *unused)
-{
- return sizeof(struct ost_lvb);
-}
-
-static int filter_lvbo_fill(struct ldlm_lock *lock,
- void *buf, int buflen)
-{
- struct ldlm_resource *res = lock->l_resource;
-
- lock_res(res);
- LASSERTF(buflen >= res->lr_lvb_len,
- "actual %d, want %d\n", buflen, res->lr_lvb_len);
- memcpy(buf, res->lr_lvb_data, res->lr_lvb_len);
- unlock_res(res);
-
- return res->lr_lvb_len;
-}
-
-struct ldlm_valblock_ops filter_lvbo = {
- lvbo_init: filter_lvbo_init,
- lvbo_update: filter_lvbo_update,
- lvbo_free: filter_lvbo_free,
- lvbo_size: filter_lvbo_size,
- lvbo_fill: filter_lvbo_fill
-};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff