2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #include <linux/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/gfs2_ondisk.h>
15 #include <linux/crc32.h>
16 #include <linux/lm_interface.h>
22 #include "ops_dentry.h"
27 * gfs2_drevalidate - Check directory lookup consistency
28 * @dentry: the mapping to check
31 * Check to make sure the lookup necessary to arrive at this inode from its
32 * parent is still good.
34 * Returns: 1 if the dentry is ok, 0 if it isn't
37 static int gfs2_drevalidate(struct dentry *dentry, struct nameidata *nd)
39 struct dentry *parent = dget_parent(dentry);
40 struct gfs2_sbd *sdp = GFS2_SB(parent->d_inode);
41 struct gfs2_inode *dip = GFS2_I(parent->d_inode);
42 struct inode *inode = dentry->d_inode;
43 struct gfs2_holder d_gh;
44 struct gfs2_inode *ip = NULL;
49 if (is_bad_inode(inode))
54 if (sdp->sd_args.ar_localcaching)
57 had_lock = gfs2_glock_is_locked_by_me(dip->i_gl);
59 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
64 error = gfs2_dir_check(parent->d_inode, &dentry->d_name, ip);
80 gfs2_glock_dq_uninit(&d_gh);
87 gfs2_glock_dq_uninit(&d_gh);
89 if (inode && S_ISDIR(inode->i_mode)) {
90 if (have_submounts(dentry))
92 shrink_dcache_parent(dentry);
99 gfs2_glock_dq_uninit(&d_gh);
105 static int gfs2_dhash(struct dentry *dentry, struct qstr *str)
107 str->hash = gfs2_disk_hash(str->name, str->len);
111 struct dentry_operations gfs2_dops = {
112 .d_revalidate = gfs2_drevalidate,
113 .d_hash = gfs2_dhash,