usr/src/uts/common/sys/devpolicy.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_DEVPOLICY_H
  28 #define _SYS_DEVPOLICY_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/types.h>
  33 #include <sys/priv.h>
  34 #include <sys/param.h>
  35 #include <sys/vnode.h>
  36
  37 #ifdef  __cplusplus
  38 extern "C" {
  39 #endif
  40
  41 /*
  42  * Device policy system call interface data structure.
  43  *
  44  * Inside the kernel we only make the structure definition available when the
  45  * privilege set definition is complete, i.e., something included
  46  * <sys/priv_const.h> before including this file.
  47  */
  48
  49 typedef struct devplcysys devplcysys_t;
  50
  51 #if defined(__PRIV_CONST_IMPL) || !defined(_KERNEL)
  52
  53 struct devplcysys {
  54         major_t         dps_maj;        /* major number */
  55         minor_t         dps_lomin;      /* low minor number, if known */
  56         minor_t         dps_himin;      /* high minor number, if known */
  57         char            dps_minornm[MAXNAMELEN]; /* minor name/pattern */
  58         boolean_t       dps_isblock;    /* expanded device is a block dev */
  59 #ifdef _KERNEL
  60         priv_set_t      dps_rdp;        /* privileges required for reading */
  61         priv_set_t      dps_wrp;        /* privileges required for writing */
  62 #else
  63         priv_chunk_t    dps_sets[1];    /* read/write privilege sets */
  64 #endif
  65 };
  66
  67 #ifdef _KERNEL
  68 /*
  69  * The actual device policy structure.  This is returned on table
  70  * lookups.
  71  */
  72 struct devplcy {
  73         uint32_t        dp_ref;         /* Reference count */
  74         uint32_t        dp_gen;         /* Generation count */
  75         priv_set_t      dp_rdp;         /* Privileges required for reading */
  76         priv_set_t      dp_wrp;         /* Privileges required for writing */
  77 };
  78 #endif /* _KERNEL */
  79
  80 #endif /* __PRIV_CONST_IMPL || !_KERNEL */
  81
  82 #ifdef _KERNEL
  83
  84 typedef struct devplcy devplcy_t;
  85
  86 extern devplcy_t *nullpolicy;           /* The null policy */
  87
  88 extern volatile uint32_t devplcy_gen;   /* The current generation count */
  89
  90 extern devplcy_t *dpget(void);
  91 extern void dphold(devplcy_t *);
  92 extern void dpfree(devplcy_t *);
  93 extern devplcy_t *devpolicy_find(vnode_t *);
  94
  95 extern void devpolicy_init(void);
  96 extern int devpolicy_load(int, size_t, devplcysys_t *);
  97 extern int devpolicy_get(int *, size_t, devplcysys_t *);
  98 extern int devpolicy_getbyname(size_t, devplcysys_t *, char *);
  99
 100 extern devplcy_t *devpolicy_priv_by_name(const char *, const char *);
 101
 102 #else /* _KERNEL */
 103 #define DEVPLCYSYS_SZ(ip)       (sizeof (devplcysys_t) + \
 104                                 ((ip)->priv_setsize * 2 - 1) * \
 105                                 sizeof (priv_chunk_t))
 106 #define DEVPLCYSYS_RDP(dp, ip)  ((priv_set_t *)(&(dp)->dps_sets[0]))
 107 #define DEVPLCYSYS_WRP(dp, ip)  \
 108                         ((priv_set_t *)(&(dp)->dps_sets[(ip)->priv_setsize]))
 109
 110 #define DEVPLCY_TKN_RDP         "read_priv_set"
 111 #define DEVPLCY_TKN_WRP         "write_priv_set"
 112
 113 #endif /* _KERNEL */
 114
 115 #define MAXDEVPOLICY            1000
 116 #define DEVPOLICY_DFLT_MAJ      ((major_t)~0)
 117
 118 #ifdef  __cplusplus
 119 }
 120 #endif
 121
 122 #endif  /* _SYS_DEVPOLICY_H */