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 <net/net_namespace.h> 28 #include "flask.h" 29 #include "avc.h" 30 31 struct task_security_struct { 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 }; 39 40 /* 41 * get the subjective security ID of the current task 42 */ 43 static inline u32 current_sid(void) 44 { 45 const struct task_security_struct *tsec = current_security(); 46 47 return tsec->sid; 48 } 49 50 enum label_initialized { 51 LABEL_INVALID, /* invalid or not initialized */ 52 LABEL_INITIALIZED, /* initialized */ 53 LABEL_PENDING 54 }; 55 56 struct inode_security_struct { 57 struct inode *inode; /* back pointer to inode object */ 58 union { 59 struct list_head list; /* list of inode_security_struct */ 60 struct rcu_head rcu; /* for freeing the inode_security_struct */ 61 }; 62 u32 task_sid; /* SID of creating task */ 63 u32 sid; /* SID of this object */ 64 u16 sclass; /* security class of this object */ 65 unsigned char initialized; /* initialization flag */ 66 spinlock_t lock; 67 }; 68 69 struct file_security_struct { 70 u32 sid; /* SID of open file description */ 71 u32 fown_sid; /* SID of file owner (for SIGIO) */ 72 u32 isid; /* SID of inode at the time of file open */ 73 u32 pseqno; /* Policy seqno at the time of file open */ 74 }; 75 76 struct superblock_security_struct { 77 struct super_block *sb; /* back pointer to sb object */ 78 u32 sid; /* SID of file system superblock */ 79 u32 def_sid; /* default SID for labeling */ 80 u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */ 81 unsigned short behavior; /* labeling behavior */ 82 unsigned short flags; /* which mount options were specified */ 83 struct mutex lock; 84 struct list_head isec_head; 85 spinlock_t isec_lock; 86 }; 87 88 struct msg_security_struct { 89 u32 sid; /* SID of message */ 90 }; 91 92 struct ipc_security_struct { 93 u16 sclass; /* security class of this object */ 94 u32 sid; /* SID of IPC resource */ 95 }; 96 97 struct netif_security_struct { 98 struct net *ns; /* network namespace */ 99 int ifindex; /* device index */ 100 u32 sid; /* SID for this interface */ 101 }; 102 103 struct netnode_security_struct { 104 union { 105 __be32 ipv4; /* IPv4 node address */ 106 struct in6_addr ipv6; /* IPv6 node address */ 107 } addr; 108 u32 sid; /* SID for this node */ 109 u16 family; /* address family */ 110 }; 111 112 struct netport_security_struct { 113 u32 sid; /* SID for this node */ 114 u16 port; /* port number */ 115 u8 protocol; /* transport protocol */ 116 }; 117 118 struct sk_security_struct { 119 #ifdef CONFIG_NETLABEL 120 enum { /* NetLabel state */ 121 NLBL_UNSET = 0, 122 NLBL_REQUIRE, 123 NLBL_LABELED, 124 NLBL_REQSKB, 125 NLBL_CONNLABELED, 126 } nlbl_state; 127 struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */ 128 #endif 129 u32 sid; /* SID of this object */ 130 u32 peer_sid; /* SID of peer */ 131 u16 sclass; /* sock security class */ 132 }; 133 134 struct tun_security_struct { 135 u32 sid; /* SID for the tun device sockets */ 136 }; 137 138 struct key_security_struct { 139 u32 sid; /* SID of key */ 140 }; 141 142 extern unsigned int selinux_checkreqprot; 143 144 #endif /* _SELINUX_OBJSEC_H_ */ 145