diff options
Diffstat (limited to 'freebsd/sys/fs/deadfs/dead_vnops.c')
| -rw-r--r-- | freebsd/sys/fs/deadfs/dead_vnops.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/freebsd/sys/fs/deadfs/dead_vnops.c b/freebsd/sys/fs/deadfs/dead_vnops.c new file mode 100644 index 00000000..a3153aed --- /dev/null +++ b/freebsd/sys/fs/deadfs/dead_vnops.c @@ -0,0 +1,159 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)dead_vnops.c 8.1 (Berkeley) 6/10/93 + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/poll.h> +#include <sys/vnode.h> + +/* + * Prototypes for dead operations on vnodes. + */ +static vop_lookup_t dead_lookup; +static vop_open_t dead_open; +static vop_getwritemount_t dead_getwritemount; +static vop_rename_t dead_rename; +static vop_unset_text_t dead_unset_text; + +struct vop_vector dead_vnodeops = { + .vop_default = &default_vnodeops, + + .vop_access = VOP_EBADF, + .vop_advlock = VOP_EBADF, + .vop_bmap = VOP_EBADF, + .vop_create = VOP_PANIC, + .vop_getattr = VOP_EBADF, + .vop_getwritemount = dead_getwritemount, + .vop_inactive = VOP_NULL, + .vop_ioctl = VOP_EBADF, + .vop_link = VOP_PANIC, + .vop_lookup = dead_lookup, + .vop_mkdir = VOP_PANIC, + .vop_mknod = VOP_PANIC, + .vop_open = dead_open, + .vop_pathconf = VOP_EBADF, /* per pathconf(2) */ + .vop_poll = dead_poll, + .vop_read = dead_read, + .vop_readdir = VOP_EBADF, + .vop_readlink = VOP_EBADF, + .vop_reclaim = VOP_NULL, + .vop_remove = VOP_PANIC, + .vop_rename = dead_rename, + .vop_rmdir = VOP_PANIC, + .vop_setattr = VOP_EBADF, + .vop_symlink = VOP_PANIC, + .vop_vptocnp = VOP_EBADF, + .vop_unset_text = dead_unset_text, + .vop_write = dead_write, +}; + +static int +dead_getwritemount(struct vop_getwritemount_args *ap) +{ + + *(ap->a_mpp) = NULL; + return (0); +} + +/* + * Trivial lookup routine that always fails. + */ +static int +dead_lookup(struct vop_lookup_args *ap) +{ + + *ap->a_vpp = NULL; + return (ENOTDIR); +} + +/* + * Open always fails as if device did not exist. + */ +static int +dead_open(struct vop_open_args *ap) +{ + + return (ENXIO); +} + +int +dead_read(struct vop_read_args *ap) +{ + + /* + * Return EOF for tty devices, EIO for others + */ + if ((ap->a_vp->v_vflag & VV_ISTTY) == 0) + return (EIO); + return (0); +} + +int +dead_write(struct vop_write_args *ap) +{ + + return (EIO); +} + +int +dead_poll(struct vop_poll_args *ap) +{ + + if (ap->a_events & ~POLLSTANDARD) + return (POLLNVAL); + + /* + * Let the user find out that the descriptor is gone. + */ + return (POLLHUP | ((POLLIN | POLLRDNORM) & ap->a_events)); + +} + +static int +dead_rename(struct vop_rename_args *ap) +{ + + vop_rename_fail(ap); + return (EXDEV); +} + +static int +dead_unset_text(struct vop_unset_text_args *ap) +{ + + return (0); +} |