1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software donated to Berkeley by 8 * Jan-Simon Pendry. 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 * @(#)fdesc.h 8.5 (Berkeley) 1/21/94 35 * 36 * $FreeBSD$ 37 */ 38 39 #ifndef _FS_FDESC_H_ 40 #define _FS_FDESC_H_ 41 42 /* Private mount flags for fdescfs. */ 43 #define FMNT_UNMOUNTF 0x01 44 #define FMNT_LINRDLNKF 0x02 45 46 struct fdescmount { 47 struct vnode *f_root; /* Root node */ 48 int flags; 49 }; 50 51 #define FD_ROOT 1 52 #define FD_DESC 3 53 54 typedef enum { 55 Froot, 56 Fdesc 57 } fdntype; 58 59 struct fdescnode { 60 LIST_ENTRY(fdescnode) fd_hash; /* Hash list */ 61 struct vnode *fd_vnode; /* Back ptr to vnode */ 62 fdntype fd_type; /* Type of this node */ 63 unsigned fd_fd; /* Fd to be dup'ed */ 64 int fd_ix; /* filesystem index */ 65 }; 66 67 extern struct mtx fdesc_hashmtx; 68 #define VFSTOFDESC(mp) ((struct fdescmount *)((mp)->mnt_data)) 69 #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data) 70 71 extern vfs_init_t fdesc_init; 72 extern vfs_uninit_t fdesc_uninit; 73 extern int fdesc_allocvp(fdntype, unsigned, int, struct mount *, 74 struct vnode **); 75 #endif /* !_FS_FDESC_H_ */ 76