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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$ 35 * 36 * @(#)vnioctl.h 8.1 (Berkeley) 6/10/93 37 * 38 * $FreeBSD: src/sys/sys/vnioctl.h,v 1.4 1999/09/17 05:33:58 dillon Exp $ 39 */ 40 41 #ifndef _SYS_VNIOCTL_H_ 42 #define _SYS_VNIOCTL_H_ 43 44 #ifndef _SYS_IOCCOM_H_ 45 #include <sys/ioccom.h> 46 #endif 47 #ifndef _SYS_PARAM_H_ 48 #include <sys/param.h> /* PATH_MAX */ 49 #endif 50 51 /* 52 * Ioctl definitions for file (vnode) disk pseudo-device. 53 */ 54 55 #define _PATH_VNTAB "/etc/vntab" /* default config file */ 56 57 struct vn_ioctl { 58 char *vn_file; /* pathname of file to mount */ 59 int64_t vn_size; /* (returned) size of disk */ 60 }; 61 62 /* 63 * Structure used by userland to query vn devices. 64 * 65 * In file-backed configurations, vnu_file will contain the full path to 66 * the backing file, with vnu_dev and vnu_ino pointing to the appropriate 67 * filesystem entries for that file. 68 * 69 * In swap-backed configurations, vnu_file will contain the token "swap", 70 * with vnu_size and vnu_secsize indicating the portion of virtual memory 71 * in use by the vnode disk. 72 * 73 * Todo: verify vnu_file within a jail - path disclosure problem ? 74 */ 75 76 77 struct vn_user { 78 int vnu_unit; /* vn unit */ 79 char vnu_file[PATH_MAX]; /* vn description */ 80 #define _VN_USER_SWAP "swap" /* indicates swap-backed vn */ 81 union { 82 dev_t dev; /* vn device */ 83 u_int64_t size; /* size per vnu_secsize */ 84 } data1; 85 union { 86 ino_t ino; /* vn inode */ 87 int secsize; /* sector size */ 88 } data2; 89 }; 90 #define vnu_dev data1.dev 91 #define vnu_size data1.size 92 #define vnu_ino data2.ino 93 #define vnu_secsize data2.secsize 94 95 /* 96 * Before you can use a unit, it must be configured with VNIOCSET. 97 * The configuration persists across opens and closes of the device; 98 * an VNIOCCLR must be used to reset a configuration. An attempt to 99 * VNIOCSET an already active unit will return EBUSY. 100 */ 101 #define VNIOCATTACH _IOWR('F', 0, struct vn_ioctl) /* attach file */ 102 #define VNIOCDETACH _IOWR('F', 1, struct vn_ioctl) /* detach disk */ 103 #define VNIOCGSET _IOWR('F', 2, u_long ) /* set global option */ 104 #define VNIOCGCLEAR _IOWR('F', 3, u_long ) /* reset --//-- */ 105 #define VNIOCUSET _IOWR('F', 4, u_long ) /* set unit option */ 106 #define VNIOCUCLEAR _IOWR('F', 5, u_long ) /* reset --//-- */ 107 #define VNIOCGET _IOWR('F', 6, struct vn_user) /* get disk info */ 108 109 #define VN_FOLLOW 0x2 /* Debug flow in vn driver */ 110 #define VN_DEBUG 0x4 /* Debug data in vn driver */ 111 #define VN_IO 0x8 /* Debug I/O in vn driver */ 112 #define VN_DONTCLUSTER 0x10 /* Don't cluster */ 113 #define VN_RESERVE 0x20 /* Pre-reserve swap */ 114 115 #endif /* _SYS_VNIOCTL_H_*/ 116