xref: /illumos-gate/usr/src/uts/common/sys/devpolicy.h (revision 2d6eb4a5)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
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4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
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7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
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13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
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20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #ifndef	_SYS_DEVPOLICY_H
28*7c478bd9Sstevel@tonic-gate #define	_SYS_DEVPOLICY_H
29*7c478bd9Sstevel@tonic-gate 
30*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
31*7c478bd9Sstevel@tonic-gate #include <sys/priv.h>
32*7c478bd9Sstevel@tonic-gate #include <sys/param.h>
33*7c478bd9Sstevel@tonic-gate #include <sys/vnode.h>
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
36*7c478bd9Sstevel@tonic-gate extern "C" {
37*7c478bd9Sstevel@tonic-gate #endif
38*7c478bd9Sstevel@tonic-gate 
39*7c478bd9Sstevel@tonic-gate /*
40*7c478bd9Sstevel@tonic-gate  * Device policy system call interface data structure.
41*7c478bd9Sstevel@tonic-gate  *
42*7c478bd9Sstevel@tonic-gate  * Inside the kernel we only make the structure definition available when the
43*7c478bd9Sstevel@tonic-gate  * privilege set definition is complete, i.e., something included
44*7c478bd9Sstevel@tonic-gate  * <sys/priv_const.h> before including this file.
45*7c478bd9Sstevel@tonic-gate  */
46*7c478bd9Sstevel@tonic-gate 
47*7c478bd9Sstevel@tonic-gate typedef struct devplcysys devplcysys_t;
48*7c478bd9Sstevel@tonic-gate 
49*7c478bd9Sstevel@tonic-gate #if defined(__PRIV_CONST_IMPL) || !defined(_KERNEL)
50*7c478bd9Sstevel@tonic-gate 
51*7c478bd9Sstevel@tonic-gate struct devplcysys {
52*7c478bd9Sstevel@tonic-gate 	major_t		dps_maj;	/* major number */
53*7c478bd9Sstevel@tonic-gate 	minor_t		dps_lomin;	/* low minor number, if known */
54*7c478bd9Sstevel@tonic-gate 	minor_t		dps_himin;	/* high minor number, if known */
55*7c478bd9Sstevel@tonic-gate 	char		dps_minornm[MAXNAMELEN]; /* minor name/pattern */
56*7c478bd9Sstevel@tonic-gate 	boolean_t	dps_isblock;	/* expanded device is a block dev */
57*7c478bd9Sstevel@tonic-gate #ifdef _KERNEL
58*7c478bd9Sstevel@tonic-gate 	priv_set_t	dps_rdp;	/* privileges required for reading */
59*7c478bd9Sstevel@tonic-gate 	priv_set_t	dps_wrp;	/* privileges required for writing */
60*7c478bd9Sstevel@tonic-gate #else
61*7c478bd9Sstevel@tonic-gate 	priv_chunk_t	dps_sets[1];	/* read/write privilege sets */
62*7c478bd9Sstevel@tonic-gate #endif
63*7c478bd9Sstevel@tonic-gate };
64*7c478bd9Sstevel@tonic-gate 
65*7c478bd9Sstevel@tonic-gate #ifdef _KERNEL
66*7c478bd9Sstevel@tonic-gate /*
67*7c478bd9Sstevel@tonic-gate  * The actual device policy structure.  This is returned on table
68*7c478bd9Sstevel@tonic-gate  * lookups.
69*7c478bd9Sstevel@tonic-gate  */
70*7c478bd9Sstevel@tonic-gate struct devplcy {
71*7c478bd9Sstevel@tonic-gate 	uint32_t	dp_ref;		/* Reference count */
72*7c478bd9Sstevel@tonic-gate 	uint32_t	dp_gen;		/* Generation count */
73*7c478bd9Sstevel@tonic-gate 	priv_set_t	dp_rdp;		/* Privileges required for reading */
74*7c478bd9Sstevel@tonic-gate 	priv_set_t	dp_wrp;		/* Privileges required for writing */
75*7c478bd9Sstevel@tonic-gate };
76*7c478bd9Sstevel@tonic-gate #endif /* _KERNEL */
77*7c478bd9Sstevel@tonic-gate 
78*7c478bd9Sstevel@tonic-gate #endif /* __PRIV_CONST_IMPL || !_KERNEL */
79*7c478bd9Sstevel@tonic-gate 
80*7c478bd9Sstevel@tonic-gate #ifdef _KERNEL
81*7c478bd9Sstevel@tonic-gate 
82*7c478bd9Sstevel@tonic-gate typedef struct devplcy devplcy_t;
83*7c478bd9Sstevel@tonic-gate 
84*7c478bd9Sstevel@tonic-gate extern devplcy_t *nullpolicy;		/* The null policy */
85*7c478bd9Sstevel@tonic-gate 
86*7c478bd9Sstevel@tonic-gate extern volatile uint32_t devplcy_gen;	/* The current generation count */
87*7c478bd9Sstevel@tonic-gate 
88*7c478bd9Sstevel@tonic-gate extern devplcy_t *dpget(void);
89*7c478bd9Sstevel@tonic-gate extern void dphold(devplcy_t *);
90*7c478bd9Sstevel@tonic-gate extern void dpfree(devplcy_t *);
91*7c478bd9Sstevel@tonic-gate extern devplcy_t *devpolicy_find(vnode_t *);
92*7c478bd9Sstevel@tonic-gate 
93*7c478bd9Sstevel@tonic-gate extern void devpolicy_init(void);
94*7c478bd9Sstevel@tonic-gate extern int devpolicy_load(int, size_t, devplcysys_t *);
95*7c478bd9Sstevel@tonic-gate extern int devpolicy_get(int *, size_t, devplcysys_t *);
96*7c478bd9Sstevel@tonic-gate extern int devpolicy_getbyname(size_t, devplcysys_t *, char *);
97*7c478bd9Sstevel@tonic-gate 
98*7c478bd9Sstevel@tonic-gate extern devplcy_t *devpolicy_priv_by_name(const char *, const char *);
99*7c478bd9Sstevel@tonic-gate 
100*7c478bd9Sstevel@tonic-gate #else /* _KERNEL */
101*7c478bd9Sstevel@tonic-gate #define	DEVPLCYSYS_SZ(ip)	(sizeof (devplcysys_t) + \
102*7c478bd9Sstevel@tonic-gate 				((ip)->priv_setsize * 2 - 1) * \
103*7c478bd9Sstevel@tonic-gate 				sizeof (priv_chunk_t))
104*7c478bd9Sstevel@tonic-gate #define	DEVPLCYSYS_RDP(dp, ip)	((priv_set_t *)(&(dp)->dps_sets[0]))
105*7c478bd9Sstevel@tonic-gate #define	DEVPLCYSYS_WRP(dp, ip)	\
106*7c478bd9Sstevel@tonic-gate 			((priv_set_t *)(&(dp)->dps_sets[(ip)->priv_setsize]))
107*7c478bd9Sstevel@tonic-gate 
108*7c478bd9Sstevel@tonic-gate #define	DEVPLCY_TKN_RDP		"read_priv_set"
109*7c478bd9Sstevel@tonic-gate #define	DEVPLCY_TKN_WRP		"write_priv_set"
110*7c478bd9Sstevel@tonic-gate 
111*7c478bd9Sstevel@tonic-gate #endif /* _KERNEL */
112*7c478bd9Sstevel@tonic-gate 
113*7c478bd9Sstevel@tonic-gate #define	MAXDEVPOLICY		1000
114*7c478bd9Sstevel@tonic-gate #define	DEVPOLICY_DFLT_MAJ	((major_t)~0)
115*7c478bd9Sstevel@tonic-gate 
116*7c478bd9Sstevel@tonic-gate #ifdef	__cplusplus
117*7c478bd9Sstevel@tonic-gate }
118*7c478bd9Sstevel@tonic-gate #endif
119*7c478bd9Sstevel@tonic-gate 
120*7c478bd9Sstevel@tonic-gate #endif	/* _SYS_DEVPOLICY_H */
121