security/selinux/include/objsec.h

   1 /*
   2  *  NSA Security-Enhanced Linux (SELinux) security module
   3  *
   4  *  This file contains the SELinux security data structures for kernel objects.
   5  *
   6  *  Author(s):  Stephen Smalley, <sds@epoch.ncsc.mil>
   7  *              Chris Vance, <cvance@nai.com>
   8  *              Wayne Salamon, <wsalamon@nai.com>
   9  *              James Morris <jmorris@redhat.com>
  10  *
  11  *  Copyright (C) 2001,2002 Networks Associates Technology, Inc.
  12  *  Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
  13  *
  14  *      This program is free software; you can redistribute it and/or modify
  15  *      it under the terms of the GNU General Public License version 2,
  16  *      as published by the Free Software Foundation.
  17  */
  18 #ifndef _SELINUX_OBJSEC_H_
  19 #define _SELINUX_OBJSEC_H_
  20
  21 #include <linux/list.h>
  22 #include <linux/sched.h>
  23 #include <linux/fs.h>
  24 #include <linux/binfmts.h>
  25 #include <linux/in.h>
  26 #include <linux/spinlock.h>
  27 #include "flask.h"
  28 #include "avc.h"
  29
  30 struct task_security_struct {
  31         struct task_struct *task;      /* back pointer to task object */
  32         u32 osid;            /* SID prior to last execve */
  33         u32 sid;             /* current SID */
  34         u32 exec_sid;        /* exec SID */
  35         u32 create_sid;      /* fscreate SID */
  36         u32 keycreate_sid;   /* keycreate SID */
  37         u32 sockcreate_sid;  /* fscreate SID */
  38         u32 ptrace_sid;      /* SID of ptrace parent */
  39 };
  40
  41 struct inode_security_struct {
  42         struct inode *inode;           /* back pointer to inode object */
  43         struct list_head list;         /* list of inode_security_struct */
  44         u32 task_sid;        /* SID of creating task */
  45         u32 sid;             /* SID of this object */
  46         u16 sclass;       /* security class of this object */
  47         unsigned char initialized;     /* initialization flag */
  48         struct mutex lock;
  49         unsigned char inherit;         /* inherit SID from parent entry */
  50 };
  51
  52 struct file_security_struct {
  53         struct file *file;              /* back pointer to file object */
  54         u32 sid;              /* SID of open file description */
  55         u32 fown_sid;         /* SID of file owner (for SIGIO) */
  56         u32 isid;             /* SID of inode at the time of file open */
  57         u32 pseqno;           /* Policy seqno at the time of file open */
  58 };
  59
  60 struct superblock_security_struct {
  61         struct super_block *sb;         /* back pointer to sb object */
  62         struct list_head list;          /* list of superblock_security_struct */
  63         u32 sid;                        /* SID of file system superblock */
  64         u32 def_sid;                    /* default SID for labeling */
  65         u32 mntpoint_sid;               /* SECURITY_FS_USE_MNTPOINT context for files */
  66         unsigned int behavior;          /* labeling behavior */
  67         unsigned char initialized;      /* initialization flag */
  68         unsigned char proc;             /* proc fs */
  69         struct mutex lock;
  70         struct list_head isec_head;
  71         spinlock_t isec_lock;
  72 };
  73
  74 struct msg_security_struct {
  75         struct msg_msg *msg;            /* back pointer */
  76         u32 sid;              /* SID of message */
  77 };
  78
  79 struct ipc_security_struct {
  80         struct kern_ipc_perm *ipc_perm; /* back pointer */
  81         u16 sclass;     /* security class of this object */
  82         u32 sid;              /* SID of IPC resource */
  83 };
  84
  85 struct bprm_security_struct {
  86         struct linux_binprm *bprm;     /* back pointer to bprm object */
  87         u32 sid;                       /* SID for transformed process */
  88         unsigned char set;
  89
  90         /*
  91          * unsafe is used to share failure information from bprm_apply_creds()
  92          * to bprm_post_apply_creds().
  93          */
  94         char unsafe;
  95 };
  96
  97 struct netif_security_struct {
  98         struct net_device *dev;         /* back pointer */
  99         u32 if_sid;                     /* SID for this interface */
 100         u32 msg_sid;                    /* default SID for messages received on this interface */
 101 };
 102
 103 struct sk_security_struct {
 104         struct sock *sk;                /* back pointer to sk object */
 105         u32 sid;                        /* SID of this object */
 106         u32 peer_sid;                   /* SID of peer */
 107 #ifdef CONFIG_NETLABEL
 108         u16 sclass;                     /* sock security class */
 109         enum {                          /* NetLabel state */
 110                 NLBL_UNSET = 0,
 111                 NLBL_REQUIRE,
 112                 NLBL_LABELED,
 113         } nlbl_state;
 114         spinlock_t nlbl_lock;           /* protects nlbl_state */
 115 #endif
 116 };
 117
 118 struct key_security_struct {
 119         struct key *obj; /* back pointer */
 120         u32 sid;         /* SID of key */
 121 };
 122
 123 extern unsigned int selinux_checkreqprot;
 124
 125 #endif /* _SELINUX_OBJSEC_H_ */