LXR linux/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 *  Copyright (C) 2016 Mellanox Technologies
  14 *
  15 *      This program is free software; you can redistribute it and/or modify
  16 *      it under the terms of the GNU General Public License version 2,
  17 *      as published by the Free Software Foundation.
  18 */
  19#ifndef _SELINUX_OBJSEC_H_
  20#define _SELINUX_OBJSEC_H_
  21
  22#include <linux/list.h>
  23#include <linux/sched.h>
  24#include <linux/fs.h>
  25#include <linux/binfmts.h>
  26#include <linux/in.h>
  27#include <linux/spinlock.h>
  28#include <net/net_namespace.h>
  29#include "flask.h"
  30#include "avc.h"
  31
  32struct task_security_struct {
  33        u32 osid;               /* SID prior to last execve */
  34        u32 sid;                /* current SID */
  35        u32 exec_sid;           /* exec SID */
  36        u32 create_sid;         /* fscreate SID */
  37        u32 keycreate_sid;      /* keycreate SID */
  38        u32 sockcreate_sid;     /* fscreate SID */
  39};
  40
  41/*
  42 * get the subjective security ID of the current task
  43 */
  44static inline u32 current_sid(void)
  45{
  46        const struct task_security_struct *tsec = current_security();
  47
  48        return tsec->sid;
  49}
  50
  51enum label_initialized {
  52        LABEL_INVALID,          /* invalid or not initialized */
  53        LABEL_INITIALIZED,      /* initialized */
  54        LABEL_PENDING
  55};
  56
  57struct inode_security_struct {
  58        struct inode *inode;    /* back pointer to inode object */
  59        union {
  60                struct list_head list;  /* list of inode_security_struct */
  61                struct rcu_head rcu;    /* for freeing the inode_security_struct */
  62        };
  63        u32 task_sid;           /* SID of creating task */
  64        u32 sid;                /* SID of this object */
  65        u16 sclass;             /* security class of this object */
  66        unsigned char initialized;      /* initialization flag */
  67        spinlock_t lock;
  68};
  69
  70struct file_security_struct {
  71        u32 sid;                /* SID of open file description */
  72        u32 fown_sid;           /* SID of file owner (for SIGIO) */
  73        u32 isid;               /* SID of inode at the time of file open */
  74        u32 pseqno;             /* Policy seqno at the time of file open */
  75};
  76
  77struct superblock_security_struct {
  78        struct super_block *sb;         /* back pointer to sb object */
  79        u32 sid;                        /* SID of file system superblock */
  80        u32 def_sid;                    /* default SID for labeling */
  81        u32 mntpoint_sid;               /* SECURITY_FS_USE_MNTPOINT context for files */
  82        unsigned short behavior;        /* labeling behavior */
  83        unsigned short flags;           /* which mount options were specified */
  84        struct mutex lock;
  85        struct list_head isec_head;
  86        spinlock_t isec_lock;
  87};
  88
  89struct msg_security_struct {
  90        u32 sid;        /* SID of message */
  91};
  92
  93struct ipc_security_struct {
  94        u16 sclass;     /* security class of this object */
  95        u32 sid;        /* SID of IPC resource */
  96};
  97
  98struct netif_security_struct {
  99        struct net *ns;                 /* network namespace */
 100        int ifindex;                    /* device index */
 101        u32 sid;                        /* SID for this interface */
 102};
 103
 104struct netnode_security_struct {
 105        union {
 106                __be32 ipv4;            /* IPv4 node address */
 107                struct in6_addr ipv6;   /* IPv6 node address */
 108        } addr;
 109        u32 sid;                        /* SID for this node */
 110        u16 family;                     /* address family */
 111};
 112
 113struct netport_security_struct {
 114        u32 sid;                        /* SID for this node */
 115        u16 port;                       /* port number */
 116        u8 protocol;                    /* transport protocol */
 117};
 118
 119struct sk_security_struct {
 120#ifdef CONFIG_NETLABEL
 121        enum {                          /* NetLabel state */
 122                NLBL_UNSET = 0,
 123                NLBL_REQUIRE,
 124                NLBL_LABELED,
 125                NLBL_REQSKB,
 126                NLBL_CONNLABELED,
 127        } nlbl_state;
 128        struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */
 129#endif
 130        u32 sid;                        /* SID of this object */
 131        u32 peer_sid;                   /* SID of peer */
 132        u16 sclass;                     /* sock security class */
 133};
 134
 135struct tun_security_struct {
 136        u32 sid;                        /* SID for the tun device sockets */
 137};
 138
 139struct key_security_struct {
 140        u32 sid;        /* SID of key */
 141};
 142
 143struct ib_security_struct {
 144        u32 sid;        /* SID of the queue pair or MAD agent */
 145};
 146
 147struct pkey_security_struct {
 148        u64     subnet_prefix; /* Port subnet prefix */
 149        u16     pkey;   /* PKey number */
 150        u32     sid;    /* SID of pkey */
 151};
 152
 153extern unsigned int selinux_checkreqprot;
 154
 155#endif /* _SELINUX_OBJSEC_H_ */
 156