static int
devfs_vop_nrmdir(struct vop_nrmdir_args *ap)
{
struct devfs_node *dnode = DEVFS_NODE(ap->a_dvp);
struct devfs_node *node;
struct namecache *ncp;
int error = ENOENT;
ncp = ap->a_nch->ncp;
if (!devfs_node_is_accessible(dnode))
return ENOENT;
lockmgr(&devfs_lock, LK_EXCLUSIVE);
if ((dnode->node_type != Nroot) && (dnode->node_type != Ndir))
goto out;
TAILQ_FOREACH(node, DEVFS_DENODE_HEAD(dnode), link) {
if (ncp->nc_nlen != node->d_dir.d_namlen)
continue;
if (memcmp(ncp->nc_name, node->d_dir.d_name, ncp->nc_nlen))
continue;
/*
* only allow removal of user created dirs
*/
if ((node->flags & DEVFS_USER_CREATED) == 0) {
error = EPERM;
goto out;
} else if (node->node_type != Ndir) {
error = ENOTDIR;
goto out;
} else if (node->nchildren > 2) {
error = ENOTEMPTY;
goto out;
} else {
if (node->v_node)
cache_inval_vp(node->v_node, CINV_DESTROY);
devfs_unlinkp(node);
error = 0;
break;
}
}
cache_unlink(ap->a_nch);
out:
lockmgr(&devfs_lock, LK_RELEASE);
return error;
}
/*
* vop_compat_nrmdir { struct nchandle *a_nch, XXX STOPGAP FUNCTION
* struct vnode *dvp,
* struct ucred *a_cred }
*/
int
vop_compat_nrmdir(struct vop_nrmdir_args *ap)
{
struct thread *td = curthread;
struct componentname cnp;
struct nchandle *nch;
struct namecache *ncp;
struct vnode *dvp;
struct vnode *vp;
int error;
/*
* Sanity checks, get a locked directory vnode.
*/
nch = ap->a_nch; /* locked namecache node */
ncp = nch->ncp;
dvp = ap->a_dvp;
if ((error = vget(dvp, LK_EXCLUSIVE)) != 0) {
kprintf("[diagnostic] vop_compat_resolve: EAGAIN on ncp %p %s\n",
ncp, ncp->nc_name);
return(EAGAIN);
}
/*
* Setup the cnp for a traditional vop_old_lookup() call. The lookup
* caches all information required to delete the entry in the
* directory inode. We expect a return code of 0 for the DELETE
* case (meaning that a vp has been found). The cnp must simulated
* a saved-name situation.
*/
bzero(&cnp, sizeof(cnp));
cnp.cn_nameiop = NAMEI_DELETE;
cnp.cn_flags = CNP_LOCKPARENT;
cnp.cn_nameptr = ncp->nc_name;
cnp.cn_namelen = ncp->nc_nlen;
cnp.cn_cred = ap->a_cred;
cnp.cn_td = td;
/*
* The vnode must be a directory and must not represent the
* current directory.
*/
vp = NULL;
error = vop_old_lookup(ap->a_head.a_ops, dvp, &vp, &cnp);
if (error == 0 && vp->v_type != VDIR)
error = ENOTDIR;
if (error == 0 && vp == dvp)
error = EINVAL;
if (error == 0 && (vp->v_flag & VROOT))
error = EBUSY;
if (error == 0) {
KKASSERT((cnp.cn_flags & CNP_PDIRUNLOCK) == 0);
error = VOP_OLD_RMDIR(dvp, vp, &cnp);
/*
* Note that this invalidation will cause any process
* currently CD'd into the directory being removed to be
* disconnected from the topology and not be able to ".."
* back out.
*/
if (error == 0) {
cache_inval(nch, CINV_DESTROY);
cache_inval_vp(vp, CINV_DESTROY);
}
}
if (vp) {
if (dvp == vp)
vrele(vp);
else
vput(vp);
}
if ((cnp.cn_flags & CNP_PDIRUNLOCK) == 0)
vn_unlock(dvp);
vrele(dvp);
return (error);
}
/*
* vop_compat_nremove { struct nchandle *a_nch, XXX STOPGAP FUNCTION
* struct vnode *a_dvp,
* struct ucred *a_cred }
*/
int
vop_compat_nremove(struct vop_nremove_args *ap)
{
struct thread *td = curthread;
struct componentname cnp;
struct nchandle *nch;
struct namecache *ncp;
struct vnode *dvp;
struct vnode *vp;
int error;
/*
* Sanity checks, get a locked directory vnode.
*/
nch = ap->a_nch; /* locked namecache node */
ncp = nch->ncp;
dvp = ap->a_dvp;
if ((error = vget(dvp, LK_EXCLUSIVE)) != 0) {
kprintf("[diagnostic] vop_compat_resolve: EAGAIN on ncp %p %s\n",
ncp, ncp->nc_name);
return(EAGAIN);
}
/*
* Setup the cnp for a traditional vop_old_lookup() call. The lookup
* caches all information required to delete the entry in the
* directory inode. We expect a return code of 0 for the DELETE
* case (meaning that a vp has been found). The cnp must simulated
* a saved-name situation.
*/
bzero(&cnp, sizeof(cnp));
cnp.cn_nameiop = NAMEI_DELETE;
cnp.cn_flags = CNP_LOCKPARENT;
cnp.cn_nameptr = ncp->nc_name;
cnp.cn_namelen = ncp->nc_nlen;
cnp.cn_cred = ap->a_cred;
cnp.cn_td = td;
/*
* The vnode must be a directory and must not represent the
* current directory.
*/
vp = NULL;
error = vop_old_lookup(ap->a_head.a_ops, dvp, &vp, &cnp);
if (error == 0 && vp->v_type == VDIR)
error = EPERM;
if (error == 0) {
KKASSERT((cnp.cn_flags & CNP_PDIRUNLOCK) == 0);
error = VOP_OLD_REMOVE(dvp, vp, &cnp);
if (error == 0) {
cache_setunresolved(nch);
cache_setvp(nch, NULL);
cache_inval_vp(vp, CINV_DESTROY);
}
}
if (vp) {
if (dvp == vp)
vrele(vp);
else
vput(vp);
}
if ((cnp.cn_flags & CNP_PDIRUNLOCK) == 0)
vn_unlock(dvp);
vrele(dvp);
return (error);
}
