2 * Copyright (c) 1989, 1993
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29 * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
37 #include <sys/mutex.h>
39 #include <sys/vnode.h>
42 * Prototypes for dead operations on vnodes.
44 static vop_bmap_t dead_bmap;
45 static vop_ioctl_t dead_ioctl;
46 static vop_lookup_t dead_lookup;
47 static vop_open_t dead_open;
48 static vop_poll_t dead_poll;
49 static vop_read_t dead_read;
50 static vop_write_t dead_write;
51 static vop_getwritemount_t dead_getwritemount;
52 static vop_rename_t dead_rename;
54 struct vop_vector dead_vnodeops = {
55 .vop_default = &default_vnodeops,
57 .vop_access = VOP_EBADF,
58 .vop_advlock = VOP_EBADF,
59 .vop_bmap = dead_bmap,
60 .vop_create = VOP_PANIC,
61 .vop_getattr = VOP_EBADF,
62 .vop_getwritemount = dead_getwritemount,
63 .vop_inactive = VOP_NULL,
64 .vop_ioctl = dead_ioctl,
65 .vop_link = VOP_PANIC,
66 .vop_lookup = dead_lookup,
67 .vop_mkdir = VOP_PANIC,
68 .vop_mknod = VOP_PANIC,
69 .vop_open = dead_open,
70 .vop_pathconf = VOP_EBADF, /* per pathconf(2) */
71 .vop_poll = dead_poll,
72 .vop_read = dead_read,
73 .vop_readdir = VOP_EBADF,
74 .vop_readlink = VOP_EBADF,
75 .vop_reclaim = VOP_NULL,
76 .vop_remove = VOP_PANIC,
77 .vop_rename = dead_rename,
78 .vop_rmdir = VOP_PANIC,
79 .vop_setattr = VOP_EBADF,
80 .vop_symlink = VOP_PANIC,
81 .vop_vptocnp = VOP_EBADF,
82 .vop_write = dead_write,
87 dead_getwritemount(ap)
88 struct vop_getwritemount_args /* {
98 * Trivial lookup routine that always fails.
103 struct vop_lookup_args /* {
104 struct vnode * a_dvp;
105 struct vnode ** a_vpp;
106 struct componentname * a_cnp;
115 * Open always fails as if device did not exist.
120 struct vop_open_args /* {
123 struct ucred *a_cred;
137 struct vop_read_args /* {
141 struct ucred *a_cred;
145 * Return EOF for tty devices, EIO for others
147 if ((ap->a_vp->v_vflag & VV_ISTTY) == 0)
158 struct vop_write_args /* {
162 struct ucred *a_cred;
169 * Device ioctl operation.
174 struct vop_ioctl_args /* {
179 struct ucred *a_cred;
183 /* XXX: Doesn't this just recurse back here ? */
184 return (VOP_IOCTL_AP(ap));
188 * Wait until the vnode has finished changing state.
192 struct vop_bmap_args /* {
195 struct bufobj **a_bop;
202 return (VOP_BMAP(ap->a_vp, ap->a_bn, ap->a_bop, ap->a_bnp, ap->a_runp, ap->a_runb));
206 * Trivial poll routine that always returns POLLHUP.
207 * This is necessary so that a process which is polling a file
208 * gets notified when that file is revoke()d.
212 struct vop_poll_args *ap;
219 struct vop_rename_args /* {
220 struct vnode *a_fdvp;
222 struct componentname *a_fcnp;
223 struct vnode *a_tdvp;
225 struct componentname *a_tcnp;