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@tycho.nsa.gov>
   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
  32 struct 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  */
  44 static inline u32 current_sid(void)
  45 {
  46         const struct task_security_struct *tsec = current_security();
  47
  48         return tsec->sid;
  49 }
  50
  51 enum label_initialized {
  52         LABEL_INVALID,          /* invalid or not initialized */
  53         LABEL_INITIALIZED,      /* initialized */
  54         LABEL_PENDING
  55 };
  56
  57 struct 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
  70 struct 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
  77 struct 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
  89 struct msg_security_struct {
  90         u32 sid;        /* SID of message */
  91 };
  92
  93 struct ipc_security_struct {
  94         u16 sclass;     /* security class of this object */
  95         u32 sid;        /* SID of IPC resource */
  96 };
  97
  98 struct netif_security_struct {
  99         struct net *ns;                 /* network namespace */
 100         int ifindex;                    /* device index */
 101         u32 sid;                        /* SID for this interface */
 102 };
 103
 104 struct 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
 113 struct netport_security_struct {
 114         u32 sid;                        /* SID for this node */
 115         u16 port;                       /* port number */
 116         u8 protocol;                    /* transport protocol */
 117 };
 118
 119 struct 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
 135 struct tun_security_struct {
 136         u32 sid;                        /* SID for the tun device sockets */
 137 };
 138
 139 struct key_security_struct {
 140         u32 sid;        /* SID of key */
 141 };
 142
 143 struct ib_security_struct {
 144         u32 sid;        /* SID of the queue pair or MAD agent */
 145 };
 146
 147 struct pkey_security_struct {
 148         u64     subnet_prefix; /* Port subnet prefix */
 149         u16     pkey;   /* PKey number */
 150         u32     sid;    /* SID of pkey */
 151 };
 152
 153 struct bpf_security_struct {
 154         u32 sid;  /*SID of bpf obj creater*/
 155 };
 156
 157 extern unsigned int selinux_checkreqprot;
 158
 159 #endif /* _SELINUX_OBJSEC_H_ */