92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
|
*
|
|
* dcache.c
|
|
*
|
|
* dentry cache handling code
|
|
*
|
|
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* 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 for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/types.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/namei.h>
|
|
|
|
#define MLOG_MASK_PREFIX ML_DCACHE
|
|
#include <cluster/masklog.h>
|
|
|
|
#include "ocfs2.h"
|
|
|
|
#include "alloc.h"
|
|
#include "dcache.h"
|
|
#include "file.h"
|
|
#include "inode.h"
|
|
|
|
static int ocfs2_dentry_revalidate(struct dentry *dentry,
|
|
struct nameidata *nd)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
int ret = 0; /* if all else fails, just return false */
|
|
struct ocfs2_super *osb;
|
|
|
|
mlog_entry("(0x%p, '%.*s')\n", dentry,
|
|
dentry->d_name.len, dentry->d_name.name);
|
|
|
|
/* Never trust a negative dentry - force a new lookup. */
|
|
if (inode == NULL) {
|
|
mlog(0, "negative dentry: %.*s\n", dentry->d_name.len,
|
|
dentry->d_name.name);
|
|
goto bail;
|
|
}
|
|
|
|
osb = OCFS2_SB(inode->i_sb);
|
|
|
|
BUG_ON(!osb);
|
|
|
|
if (inode != osb->root_inode) {
|
|
spin_lock(&OCFS2_I(inode)->ip_lock);
|
|
/* did we or someone else delete this inode? */
|
|
if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
|
|
spin_unlock(&OCFS2_I(inode)->ip_lock);
|
|
mlog(0, "inode (%"MLFu64") deleted, returning false\n",
|
|
OCFS2_I(inode)->ip_blkno);
|
|
goto bail;
|
|
}
|
|
spin_unlock(&OCFS2_I(inode)->ip_lock);
|
|
|
|
if (!inode->i_nlink) {
|
|
mlog(0, "Inode %"MLFu64" orphaned, returning false "
|
|
"dir = %d\n", OCFS2_I(inode)->ip_blkno,
|
|
S_ISDIR(inode->i_mode));
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
ret = 1;
|
|
|
|
bail:
|
|
mlog_exit(ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
struct dentry_operations ocfs2_dentry_ops = {
|
|
.d_revalidate = ocfs2_dentry_revalidate,
|
|
};
|