Change sendfile() to use the new m_ext callback scheme for cleaning up after
[dragonfly.git] / sys / sys / ucred.h
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1/*
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)ucred.h 8.4 (Berkeley) 1/9/95
34 * $FreeBSD: src/sys/sys/ucred.h,v 1.14.2.5 2002/03/09 05:20:25 dd Exp $
b153f746 35 * $DragonFly: src/sys/sys/ucred.h,v 1.6 2003/08/20 07:31:22 rob Exp $
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36 */
37
38#ifndef _SYS_UCRED_H_
39#define _SYS_UCRED_H_
40
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41struct prison;
42
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43/*
44 * Credentials.
45 *
46 * Please do not inspect cr_uid directly to determine superuserness.
dadab5e9 47 * Only the suser()/suser_cred() function should be used for this.
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48 */
49struct ucred {
50 u_int cr_ref; /* reference count */
51 uid_t cr_uid; /* effective user id */
52 short cr_ngroups; /* number of groups */
53 gid_t cr_groups[NGROUPS]; /* groups */
54 struct uidinfo *cr_uidinfo; /* per uid resource consumption */
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55 struct uidinfo *cr_ruidinfo; /* per ruid resource consumption */
56 struct prison *cr_prison; /* prison info */
57 uid_t cr_ruid; /* Real user id. */
58 uid_t cr_svuid; /* Saved effective user id. */
59 gid_t cr_rgid; /* Real group id. */
60 gid_t cr_svgid; /* Saved effective group id. */
61 int cr_refcnt; /* Number of references. */
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62};
63#define cr_gid cr_groups[0]
64#define NOCRED ((struct ucred *)0) /* no credential available */
65#define FSCRED ((struct ucred *)-1) /* filesystem credential */
66
67/*
68 * This is the external representation of struct ucred, based upon the
69 * size of a 4.2-RELEASE struct ucred. There will probably never be
70 * any need to change the size of this or layout of its used fields.
71 */
72struct xucred {
73 u_int cr_version; /* structure layout version */
74 uid_t cr_uid; /* effective user id */
75 short cr_ngroups; /* number of groups */
76 gid_t cr_groups[NGROUPS]; /* groups */
77 void *_cr_unused1; /* compatibility with old ucred */
78};
79#define XUCRED_VERSION 0
80
81#ifdef _KERNEL
82
83struct proc;
84
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85void change_euid (uid_t euid);
86void change_ruid (uid_t ruid);
87struct ucred *cratom (struct ucred **pcr);
88struct ucred *crcopy (struct ucred *cr);
89struct ucred *crdup (struct ucred *cr);
90void crfree (struct ucred *cr);
91struct ucred *crget (void);
92struct ucred *crhold (struct ucred *cr);
93void cru2x (struct ucred *cr, struct xucred *xcr);
94int groupmember (gid_t gid, struct ucred *cred);
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95#endif /* _KERNEL */
96
97#endif /* !_SYS_UCRED_H_ */