1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 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. 25 * 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 36 * SUCH DAMAGE. 37 * 38 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$ 39 * 40 * @(#)vnioctl.h 8.1 (Berkeley) 6/10/93 41 * 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 $ 44 */ 45 46 #ifndef _SYS_VNIOCTL_H_ 47 #define _SYS_VNIOCTL_H_ 48 49 #ifndef _SYS_IOCCOM_H_ 50 #include <sys/ioccom.h> 51 #endif 52 #ifndef _SYS_PARAMH_H_ 53 #include <sys/param.h> /* PATH_MAX */ 54 #endif 55 56 /* 57 * Ioctl definitions for file (vnode) disk pseudo-device. 58 */ 59 60 #define _PATH_VNTAB "/etc/vntab" /* default config file */ 61 62 struct vn_ioctl { 63 char *vn_file; /* pathname of file to mount */ 64 int64_t vn_size; /* (returned) size of disk */ 65 }; 66 67 /* 68 * Structure used by userland to query vn devices. 69 * 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. 73 * 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. 77 * 78 * Todo: verify vnu_file within a jail - path disclosure problem ? 79 */ 80 81 82 struct vn_user { 83 int vnu_unit; /* vn unit */ 84 char vnu_file[PATH_MAX]; /* vn description */ 85 #define _VN_USER_SWAP "swap" /* indicates swap-backed vn */ 86 union { 87 dev_t dev; /* vn device */ 88 u_int64_t size; /* size per vnu_secsize */ 89 } data1; 90 union { 91 ino_t ino; /* vn inode */ 92 int secsize; /* sector size */ 93 } data2; 94 }; 95 #define vnu_dev data1.dev 96 #define vnu_size data1.size 97 #define vnu_ino data2.ino 98 #define vnu_secsize data2.secsize 99 100 /* 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. 105 */ 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 */ 113 114 #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 */ 119 120 #endif /* _SYS_VNIOCTL_H_*/ 121