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Commit 8842b3be authored by Sage Weil's avatar Sage Weil
Browse files

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: default avatarAl Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: default avatarSage Weil <sage@inktank.com>
parent a2a32584

fs/ceph/dir.c

+3 −4
Original line number Diff line number Diff line
@@ -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 */

fs/ceph/mds_client.c

+0 −11
Original line number Diff line number Diff line
@@ -1469,11 +1469,6 @@ char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base, 
		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 @@ char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base, 
		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)) {