FreeBSD/Linux Kernel Cross Reference
sys/fs/fdescfs/fdesc.h
1 /*-
2 * Copyright (c) 1992, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software donated to Berkeley by
6 * Jan-Simon Pendry.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)fdesc.h 8.5 (Berkeley) 1/21/94
33 *
34 * $FreeBSD: releng/10.0/sys/fs/fdescfs/fdesc.h 191990 2009-05-11 15:33:26Z attilio $
35 */
36
37 #ifdef _KERNEL
38 /* Private mount flags for fdescfs. */
39 #define FMNT_UNMOUNTF 0x01
40 struct fdescmount {
41 struct vnode *f_root; /* Root node */
42 int flags;
43 };
44
45 #define FD_ROOT 1
46 #define FD_DESC 3
47
48 typedef enum {
49 Froot,
50 Fdesc
51 } fdntype;
52
53 struct fdescnode {
54 LIST_ENTRY(fdescnode) fd_hash; /* Hash list */
55 struct vnode *fd_vnode; /* Back ptr to vnode */
56 fdntype fd_type; /* Type of this node */
57 unsigned fd_fd; /* Fd to be dup'ed */
58 int fd_ix; /* filesystem index */
59 };
60
61 extern struct mtx fdesc_hashmtx;
62 #define VFSTOFDESC(mp) ((struct fdescmount *)((mp)->mnt_data))
63 #define VTOFDESC(vp) ((struct fdescnode *)(vp)->v_data)
64
65 extern vfs_init_t fdesc_init;
66 extern vfs_uninit_t fdesc_uninit;
67 extern int fdesc_allocvp(fdntype, unsigned, int, struct mount *,
68 struct vnode **);
69 #endif /* _KERNEL */
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