diff options
Diffstat (limited to 'lkm')
| -rw-r--r-- | lkm/union/Makefile | 10 | ||||
| -rw-r--r-- | lkm/union/union_lkm.c | 113 |
2 files changed, 123 insertions, 0 deletions
diff --git a/lkm/union/Makefile b/lkm/union/Makefile new file mode 100644 index 00000000000..23f1c19ae70 --- /dev/null +++ b/lkm/union/Makefile @@ -0,0 +1,10 @@ +# $OpenBSD: Makefile,v 1.1 1997/01/20 09:15:31 mickey Exp $ + +LKM= unionfs +SRCS+= union_lkm.c union_vfsops.c union_vnops.c union_subr.c +CFLAGS+=-I${.CURDIR}/../../sys/miscfs/union +NOMAN= noman + +.PATH: ${.CURDIR}/../../sys/miscfs/union + +.include <bsd.lkm.mk> diff --git a/lkm/union/union_lkm.c b/lkm/union/union_lkm.c new file mode 100644 index 00000000000..88a849f7c8d --- /dev/null +++ b/lkm/union/union_lkm.c @@ -0,0 +1,113 @@ +/* $OpenBSD: union_lkm.c,v 1.1 1997/01/20 09:15:32 mickey Exp $ */ + +/* + * union_lkm.c (was: kernfsmod.c) + * + * 05 Jun 93 Terry Lambert Original + * 20 Jan 97 Michael Shalayeff NetBSD PR + * by Paul Goyette <paul@pgoyette.bdt.com> + * + * Copyright (c) 1993 Terrence R. Lambert. + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by Terrence R. Lambert. + * 4. The name Terrence R. Lambert may not be used to endorse or promote + * products derived from this software without specific prior written + * permission. + * + * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``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 TERRENCE R. LAMBERT 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. + * + * from Id: kernfsmod.c,v 1.1.1.1 1995/10/18 08:44:22 deraadt Exp + */ +#include <sys/param.h> +#include <sys/ioctl.h> +#include <sys/systm.h> +#include <sys/conf.h> +#include <sys/mount.h> +#include <sys/exec.h> +#include <sys/lkm.h> +#include <sys/file.h> +#include <sys/errno.h> +#include <sys/namei.h> + +/* + * This is the vfsops table from /sys/miscfs/union/union_vfsops.c + */ +extern struct vfsops union_vfsops; +extern struct vnodeopv_desc union_vnodeop_opv_desc; + +extern int (*union_check_p) __P((off_t, struct proc *, struct vnode *, + struct file *, struct uio, int *)); +extern int union_check __P((off_t, struct proc *, struct vnode *, + struct file *, struct uio, int *)); +static int union_load __P((struct lkm_table *, int)); + +/* + * declare the filesystem + */ +MOD_VFS("union", -1, &union_vfsops) + +/* + * Routine to execute when module is loaded or unloaded. We need to set + * a couple of critical pointers for the vfs_syscalls routines. + */ +static int +union_load(lkmtp, cmd) + struct lkm_table *lkmtp; + int cmd; +{ + switch (cmd) { + case LKM_E_LOAD: + union_check_p = union_check; + break; + + case LKM_E_UNLOAD: + union_check_p = NULL; + break; + }; + return (0); +} + +/* + * LKM entry point + * (named this way to avoid keyword collision) + */ +int +unionfs(lkmtp, cmd, ver) + struct lkm_table *lkmtp; + int cmd; + int ver; +{ + + /* + * This is normally done automatically at boot time if the + * opv_desc is listed in vfs_opv_descs[] in vfs_conf.c. For + * loaded modules, we have to do it manually. + */ + vfs_opv_init_explicit(&union_vnodeop_opv_desc); + vfs_opv_init_default(&union_vnodeop_opv_desc); + + DISPATCH(lkmtp, cmd, ver, union_load, union_load, lkm_nofunc) +} + + |