2 * Copyright (c) 1989, 1993
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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 1.20 2007/08/13 17:31:56 dillon Exp $
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/kernel.h>
42 #include <sys/vnode.h>
43 #include <sys/fcntl.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_lookup (struct vop_old_lookup_args *);
53 static int dead_open (struct vop_open_args *);
54 static int dead_close (struct vop_close_args *);
55 static int dead_print (struct vop_print_args *);
56 static int dead_read (struct vop_read_args *);
57 static int dead_write (struct vop_write_args *);
59 struct vop_ops dead_vnode_vops = {
60 .vop_default = vop_defaultop,
61 .vop_access = (void *)vop_ebadf,
62 .vop_advlock = (void *)vop_ebadf,
63 .vop_bmap = dead_bmap,
64 .vop_old_create = (void *)dead_badop,
65 .vop_getattr = (void *)vop_ebadf,
66 .vop_inactive = (void *)vop_null,
67 .vop_ioctl = dead_ioctl,
68 .vop_old_link = (void *)dead_badop,
69 .vop_old_lookup = dead_lookup,
70 .vop_old_mkdir = (void *)dead_badop,
71 .vop_old_mknod = (void *)dead_badop,
72 .vop_mmap = (void *)dead_badop,
73 .vop_open = dead_open,
74 .vop_close = dead_close,
75 .vop_pathconf = (void *)vop_ebadf, /* per pathconf(2) */
76 .vop_print = dead_print,
77 .vop_read = dead_read,
78 .vop_readdir = (void *)vop_ebadf,
79 .vop_readlink = (void *)vop_ebadf,
80 .vop_reclaim = (void *)vop_null,
81 .vop_old_remove = (void *)dead_badop,
82 .vop_old_rename = (void *)dead_badop,
83 .vop_old_rmdir = (void *)dead_badop,
84 .vop_setattr = (void *)vop_ebadf,
85 .vop_old_symlink = (void *)dead_badop,
86 .vop_write = dead_write
89 struct vop_ops *dead_vnode_vops_p = &dead_vnode_vops;
91 VNODEOP_SET(dead_vnode_vops);
94 * Trivial lookup routine that always fails.
96 * dead_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
97 * struct componentname *a_cnp)
101 dead_lookup(struct vop_old_lookup_args *ap)
108 * Open always fails as if device did not exist.
110 * dead_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
115 dead_open(struct vop_open_args *ap)
121 * Close always succeeds, and does not warn or panic if v_opencount or
122 * v_writecount is incorrect, because a forced unmount or revocation
123 * might have closed the file out from under the descriptor.
126 dead_close(struct vop_close_args *ap)
128 struct vnode *vp = ap->a_vp;
130 if (vp->v_opencount > 0) {
131 if ((ap->a_fflag & FWRITE) && vp->v_writecount > 0)
141 * dead_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
142 * struct ucred *a_cred)
146 dead_read(struct vop_read_args *ap)
149 * Return EOF for tty devices, EIO for others
151 if ((ap->a_vp->v_flag & VISTTY) == 0)
159 * dead_write(struct vnode *a_vp, struct uio *a_uio, int a_ioflag,
160 * struct ucred *a_cred)
164 dead_write(struct vop_write_args *ap)
170 * Device ioctl operation.
172 * dead_ioctl(struct vnode *a_vp, int a_command, caddr_t a_data, int a_fflag,
173 * struct ucred *a_cred, struct proc *a_p)
177 dead_ioctl(struct vop_ioctl_args *ap)
183 * Wait until the vnode has finished changing state.
185 * dead_bmap(struct vnode *a_vp, off_t a_loffset,
186 * off_t *a_doffsetp, int *a_runp, int *a_runb)
189 dead_bmap(struct vop_bmap_args *ap)
195 * Print out the contents of a dead vnode.
197 * dead_print(struct vnode *a_vp)
201 dead_print(struct vop_print_args *ap)
203 kprintf("tag VT_NON, dead vnode\n");
208 * Empty vnode bad operation
213 panic("dead_badop called");