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/spinlock.h>
11 #include <linux/completion.h>
12 #include <linux/buffer_head.h>
13 #include <linux/gfs2_ondisk.h>
14 #include <linux/namei.h>
15 #include <linux/crc32.h>
26 * gfs2_drevalidate - Check directory lookup consistency
27 * @dentry: the mapping to check
28 * @flags: lookup flags
30 * Check to make sure the lookup necessary to arrive at this inode from its
31 * parent is still good.
33 * Returns: 1 if the dentry is ok, 0 if it isn't
36 static int gfs2_drevalidate(struct dentry *dentry, unsigned int flags)
38 struct dentry *parent;
40 struct gfs2_inode *dip;
42 struct gfs2_holder d_gh;
43 struct gfs2_inode *ip = NULL;
47 if (flags & LOOKUP_RCU)
50 parent = dget_parent(dentry);
51 sdp = GFS2_SB(parent->d_inode);
52 dip = GFS2_I(parent->d_inode);
53 inode = dentry->d_inode;
56 if (is_bad_inode(inode))
61 if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL)
64 had_lock = (gfs2_glock_is_locked_by_me(dip->i_gl) != NULL);
66 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
71 error = gfs2_dir_check(parent->d_inode, &dentry->d_name, ip);
87 gfs2_glock_dq_uninit(&d_gh);
94 gfs2_glock_dq_uninit(&d_gh);
96 if (check_submounts_and_drop(dentry) != 0)
103 gfs2_glock_dq_uninit(&d_gh);
109 static int gfs2_dhash(const struct dentry *dentry, struct qstr *str)
111 str->hash = gfs2_disk_hash(str->name, str->len);
115 static int gfs2_dentry_delete(const struct dentry *dentry)
117 struct gfs2_inode *ginode;
119 if (!dentry->d_inode)
122 ginode = GFS2_I(dentry->d_inode);
123 if (!ginode->i_iopen_gh.gh_gl)
126 if (test_bit(GLF_DEMOTE, &ginode->i_iopen_gh.gh_gl->gl_flags))
132 const struct dentry_operations gfs2_dops = {
133 .d_revalidate = gfs2_drevalidate,
134 .d_hash = gfs2_dhash,
135 .d_delete = gfs2_dentry_delete,