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33 * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/miscfs/deadfs/dead_vnops.c,v 1.26 1999/08/28 00:46:42 peter Exp $
35 * $DragonFly: src/sys/vfs/deadfs/dead_vnops.c,v 1.11 2004/10/12 19:20:52 dillon Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
42 #include <sys/vnode.h>
47 * Prototypes for dead operations on vnodes.
49 static int dead_badop (void);
50 static int dead_bmap (struct vop_bmap_args *);
51 static int dead_ioctl (struct vop_ioctl_args *);
52 static int dead_lock (struct vop_lock_args *);
53 static int dead_lookup (struct vop_lookup_args *);
54 static int dead_open (struct vop_open_args *);
55 static int dead_poll (struct vop_poll_args *);
56 static int dead_print (struct vop_print_args *);
57 static int dead_read (struct vop_read_args *);
58 static int dead_write (struct vop_write_args *);
60 struct vop_ops *dead_vnode_vops;
61 static struct vnodeopv_entry_desc dead_vnodeop_entries[] = {
62 { &vop_default_desc, vop_defaultop },
63 { &vop_access_desc, vop_ebadf },
64 { &vop_advlock_desc, vop_ebadf },
65 { &vop_bmap_desc, (void *) dead_bmap },
66 { &vop_create_desc, (void *) dead_badop },
67 { &vop_getattr_desc, vop_ebadf },
68 { &vop_inactive_desc, vop_null },
69 { &vop_ioctl_desc, (void *) dead_ioctl },
70 { &vop_link_desc, (void *) dead_badop },
71 { &vop_lock_desc, (void *) dead_lock },
72 { &vop_lookup_desc, (void *) dead_lookup },
73 { &vop_mkdir_desc, (void *) dead_badop },
74 { &vop_mknod_desc, (void *) dead_badop },
75 { &vop_mmap_desc, (void *) dead_badop },
76 { &vop_open_desc, (void *) dead_open },
77 { &vop_pathconf_desc, vop_ebadf }, /* per pathconf(2) */
78 { &vop_poll_desc, (void *) dead_poll },
79 { &vop_print_desc, (void *) dead_print },
80 { &vop_read_desc, (void *) dead_read },
81 { &vop_readdir_desc, vop_ebadf },
82 { &vop_readlink_desc, vop_ebadf },
83 { &vop_reclaim_desc, vop_null },
84 { &vop_remove_desc, (void *) dead_badop },
85 { &vop_rename_desc, (void *) dead_badop },
86 { &vop_rmdir_desc, (void *) dead_badop },
87 { &vop_setattr_desc, vop_ebadf },
88 { &vop_symlink_desc, (void *) dead_badop },
89 { &vop_write_desc, (void *) dead_write },
92 static struct vnodeopv_desc dead_vnodeop_opv_desc =
93 { &dead_vnode_vops, dead_vnodeop_entries };
95 VNODEOP_SET(dead_vnodeop_opv_desc);
98 * Trivial lookup routine that always fails.
100 * dead_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
101 * struct componentname *a_cnp)
105 dead_lookup(struct vop_lookup_args *ap)
112 * Open always fails as if device did not exist.
114 * dead_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
119 dead_open(struct vop_open_args *ap)
127 * dead_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
128 * struct ucred *a_cred)
132 dead_read(struct vop_read_args *ap)
135 * Return EOF for tty devices, EIO for others
137 if ((ap->a_vp->v_flag & VISTTY) == 0)
145 * dead_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
146 * struct ucred *a_cred)
150 dead_write(struct vop_write_args *ap)
156 * Device ioctl operation.
158 * dead_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, int a_fflag,
159 * struct ucred *a_cred, struct proc *a_p)
163 dead_ioctl(struct vop_ioctl_args *ap)
169 * Wait until the vnode has finished changing state.
171 * dead_lock(struct vnode *a_vp, int a_flags, struct proc *a_p)
174 dead_lock(struct vop_lock_args *ap)
180 * Wait until the vnode has finished changing state.
182 * dead_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
183 * daddr_t *a_bnp, int *a_runp, int *a_runb)
186 dead_bmap(struct vop_bmap_args *ap)
192 * Print out the contents of a dead vnode.
194 * dead_print(struct vnode *a_vp)
198 dead_print(struct vop_print_args *ap)
200 printf("tag VT_NON, dead vnode\n");
205 * Empty vnode bad operation
210 panic("dead_badop called");
215 * Trivial poll routine that always returns POLLHUP.
216 * This is necessary so that a process which is polling a file
217 * gets notified when that file is revoke()d.
220 dead_poll(struct vop_poll_args *ap)