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/smp_lock.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/crc32.h>
17 #include <linux/lm_interface.h>
23 #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;
45 struct gfs2_inum_host inum;
50 if (inode && is_bad_inode(inode))
53 if (sdp->sd_args.ar_localcaching)
56 had_lock = gfs2_glock_is_locked_by_me(dip->i_gl);
58 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
63 error = gfs2_dir_search(parent->d_inode, &dentry->d_name, &inum, &type);
79 if (!gfs2_inum_equal(&ip->i_num, &inum))
82 if (IF2DT(ip->i_inode.i_mode) != type) {
83 gfs2_consist_inode(dip);
89 gfs2_glock_dq_uninit(&d_gh);
96 gfs2_glock_dq_uninit(&d_gh);
98 if (inode && S_ISDIR(inode->i_mode)) {
99 if (have_submounts(dentry))
101 shrink_dcache_parent(dentry);
108 gfs2_glock_dq_uninit(&d_gh);
114 static int gfs2_dhash(struct dentry *dentry, struct qstr *str)
116 str->hash = gfs2_disk_hash(str->name, str->len);
120 struct dentry_operations gfs2_dops = {
121 .d_revalidate = gfs2_drevalidate,
122 .d_hash = gfs2_dhash,