2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1990, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
40 * @(#)vnioctl.h 8.1 (Berkeley) 6/10/93
42 * $FreeBSD: src/sys/sys/vnioctl.h,v 1.4 1999/09/17 05:33:58 dillon Exp $
43 * $DragonFly: src/sys/sys/vnioctl.h,v 1.4 2008/01/30 11:46:33 cat Exp $
46 #ifndef _SYS_VNIOCTL_H_
47 #define _SYS_VNIOCTL_H_
49 #ifndef _SYS_IOCCOM_H_
50 #include <sys/ioccom.h>
52 #ifndef _SYS_PARAMH_H_
53 #include <sys/param.h> /* PATH_MAX */
57 * Ioctl definitions for file (vnode) disk pseudo-device.
60 #define _PATH_VNTAB "/etc/vntab" /* default config file */
63 char *vn_file; /* pathname of file to mount */
64 int64_t vn_size; /* (returned) size of disk */
68 * Structure used by userland to query vn devices.
70 * In file-backed configurations, vnu_file will contain the full path to
71 * the backing file, with vnu_dev and vnu_ino pointing to the appropriate
72 * filesystem entries for that file.
74 * In swap-backed configurations, vnu_file will contain the token "swap",
75 * with vnu_size and vnu_secsize indicating the portion of virtual memory
76 * in use by the vnode disk.
78 * Todo: verify vnu_file within a jail - path disclosure problem ?
83 int vnu_unit; /* vn unit */
84 char vnu_file[PATH_MAX]; /* vn description */
85 #define _VN_USER_SWAP "swap" /* indicates swap-backed vn */
87 dev_t dev; /* vn device */
88 u_int64_t size; /* size per vnu_secsize */
91 ino_t ino; /* vn inode */
92 int secsize; /* sector size */
95 #define vnu_dev data1.dev
96 #define vnu_size data1.size
97 #define vnu_ino data2.ino
98 #define vnu_secsize data2.secsize
101 * Before you can use a unit, it must be configured with VNIOCSET.
102 * The configuration persists across opens and closes of the device;
103 * an VNIOCCLR must be used to reset a configuration. An attempt to
104 * VNIOCSET an already active unit will return EBUSY.
106 #define VNIOCATTACH _IOWR('F', 0, struct vn_ioctl) /* attach file */
107 #define VNIOCDETACH _IOWR('F', 1, struct vn_ioctl) /* detach disk */
108 #define VNIOCGSET _IOWR('F', 2, u_long ) /* set global option */
109 #define VNIOCGCLEAR _IOWR('F', 3, u_long ) /* reset --//-- */
110 #define VNIOCUSET _IOWR('F', 4, u_long ) /* set unit option */
111 #define VNIOCUCLEAR _IOWR('F', 5, u_long ) /* reset --//-- */
112 #define VNIOCGET _IOWR('F', 6, struct vn_user) /* get disk info */
114 #define VN_FOLLOW 0x2 /* Debug flow in vn driver */
115 #define VN_DEBUG 0x4 /* Debug data in vn driver */
116 #define VN_IO 0x8 /* Debug I/O in vn driver */
117 #define VN_DONTCLUSTER 0x10 /* Don't cluster */
118 #define VN_RESERVE 0x20 /* Pre-reserve swap */
120 #endif /* _SYS_VNIOCTL_H_*/