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ceph: clean up useless d_parent checks 

d_parent is never NULL, and IS_ROOT() is the proper way to check for a
(non-self-referential) parent.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Sage Weil 2012-06-07 13:43:35 -07:00
parent a2a3258417
commit 8842b3be96
2 changed files with 3 additions and 15 deletions
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7
fs/ceph/dir.c
View File

@ -51,8 +51,7 @@ int ceph_init_dentry(struct dentry *dentry)
goto out_unlock;
}
if (dentry->d_parent == NULL || /* nfs fh_to_dentry */
ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP)
if (ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP)
d_set_d_op(dentry, &ceph_dentry_ops);
else if (ceph_snap(dentry->d_parent->d_inode) == CEPH_SNAPDIR)
d_set_d_op(dentry, &ceph_snapdir_dentry_ops);
@ -79,7 +78,7 @@ struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry)
return NULL;
spin_lock(&dentry->d_lock);
if (dentry->d_parent) {
if (!IS_ROOT(dentry)) {
inode = dentry->d_parent->d_inode;
ihold(inode);
}
@ -1140,7 +1139,7 @@ static void ceph_d_prune(struct dentry *dentry)
dout("ceph_d_prune %p\n", dentry);
/* do we have a valid parent? */
if (!dentry->d_parent || IS_ROOT(dentry))
if (IS_ROOT(dentry))
return;
/* if we are not hashed, we don't affect D_COMPLETE */

11
fs/ceph/mds_client.c
View File

@ -1469,11 +1469,6 @@ retry:
else
len += 1 + temp->d_name.len;
temp = temp->d_parent;
if (temp == NULL) {
rcu_read_unlock();
pr_err("build_path corrupt dentry %p\n", dentry);
return ERR_PTR(-EINVAL);
}
}
rcu_read_unlock();
if (len)
@ -1510,12 +1505,6 @@ retry:
if (pos)
path[--pos] = '/';
temp = temp->d_parent;
if (temp == NULL) {
rcu_read_unlock();
pr_err("build_path corrupt dentry\n");
kfree(path);
return ERR_PTR(-EINVAL);
}
}
rcu_read_unlock();
if (pos != 0 || read_seqretry(&rename_lock, seq)) {