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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* NSA Security-Enhanced Linux (SELinux) security module
*
* This file contains the SELinux security data structures for kernel objects.
*
* Author(s): Stephen Smalley, <sds@tycho.nsa.gov>
* Chris Vance, <cvance@nai.com>
* Wayne Salamon, <wsalamon@nai.com>
* James Morris <jmorris@redhat.com>
*
* Copyright (C) 2001,2002 Networks Associates Technology, Inc.
* Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
* Copyright (C) 2016 Mellanox Technologies
*/
#ifndef _SELINUX_OBJSEC_H_
#define _SELINUX_OBJSEC_H_
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/binfmts.h>
#include <linux/in.h>
#include <linux/spinlock.h>
#include <linux/lsm_hooks.h>
#include <linux/msg.h>
#include <net/net_namespace.h>
#include "flask.h"
#include "avc.h"
struct task_security_struct {
u32 osid; /* SID prior to last execve */
u32 sid; /* current SID */
u32 exec_sid; /* exec SID */
u32 create_sid; /* fscreate SID */
u32 keycreate_sid; /* keycreate SID */
u32 sockcreate_sid; /* fscreate SID */
} __randomize_layout;
enum label_initialized {
LABEL_INVALID, /* invalid or not initialized */
LABEL_INITIALIZED, /* initialized */
LABEL_PENDING
};
struct inode_security_struct {
struct inode *inode; /* back pointer to inode object */
struct list_head list; /* list of inode_security_struct */
u32 task_sid; /* SID of creating task */
u32 sid; /* SID of this object */
u16 sclass; /* security class of this object */
unsigned char initialized; /* initialization flag */
spinlock_t lock;
};
struct file_security_struct {
u32 sid; /* SID of open file description */
u32 fown_sid; /* SID of file owner (for SIGIO) */
u32 isid; /* SID of inode at the time of file open */
u32 pseqno; /* Policy seqno at the time of file open */
};
struct superblock_security_struct {
u32 sid; /* SID of file system superblock */
u32 def_sid; /* default SID for labeling */
u32 mntpoint_sid; /* SECURITY_FS_USE_MNTPOINT context for files */
unsigned short behavior; /* labeling behavior */
unsigned short flags; /* which mount options were specified */
struct mutex lock;
struct list_head isec_head;
spinlock_t isec_lock;
};
struct msg_security_struct {
u32 sid; /* SID of message */
};
struct ipc_security_struct {
u16 sclass; /* security class of this object */
u32 sid; /* SID of IPC resource */
};
struct netif_security_struct {
struct net *ns; /* network namespace */
int ifindex; /* device index */
u32 sid; /* SID for this interface */
};
struct netnode_security_struct {
union {
__be32 ipv4; /* IPv4 node address */
struct in6_addr ipv6; /* IPv6 node address */
} addr;
u32 sid; /* SID for this node */
u16 family; /* address family */
};
struct netport_security_struct {
u32 sid; /* SID for this node */
u16 port; /* port number */
u8 protocol; /* transport protocol */
};
struct sk_security_struct {
#ifdef CONFIG_NETLABEL
enum { /* NetLabel state */
NLBL_UNSET = 0,
NLBL_REQUIRE,
NLBL_LABELED,
NLBL_REQSKB,
NLBL_CONNLABELED,
} nlbl_state;
struct netlbl_lsm_secattr *nlbl_secattr; /* NetLabel sec attributes */
#endif
u32 sid; /* SID of this object */
u32 peer_sid; /* SID of peer */
u16 sclass; /* sock security class */
enum { /* SCTP association state */
SCTP_ASSOC_UNSET = 0,
SCTP_ASSOC_SET,
} sctp_assoc_state;
};
struct tun_security_struct {
u32 sid; /* SID for the tun device sockets */
};
struct key_security_struct {
u32 sid; /* SID of key */
};
struct ib_security_struct {
u32 sid; /* SID of the queue pair or MAD agent */
};
struct pkey_security_struct {
u64 subnet_prefix; /* Port subnet prefix */
u16 pkey; /* PKey number */
u32 sid; /* SID of pkey */
};
struct bpf_security_struct {
u32 sid; /* SID of bpf obj creator */
};
struct perf_event_security_struct {
u32 sid; /* SID of perf_event obj creator */
};
extern struct lsm_blob_sizes selinux_blob_sizes;
static inline struct task_security_struct *selinux_cred(const struct cred *cred)
{
return cred->security + selinux_blob_sizes.lbs_cred;
}
static inline struct file_security_struct *selinux_file(const struct file *file)
{
return file->f_security + selinux_blob_sizes.lbs_file;
}
static inline struct inode_security_struct *selinux_inode(
const struct inode *inode)
{
if (unlikely(!inode->i_security))
return NULL;
return inode->i_security + selinux_blob_sizes.lbs_inode;
}
static inline struct msg_security_struct *selinux_msg_msg(
const struct msg_msg *msg_msg)
{
return msg_msg->security + selinux_blob_sizes.lbs_msg_msg;
}
static inline struct ipc_security_struct *selinux_ipc(
const struct kern_ipc_perm *ipc)
{
return ipc->security + selinux_blob_sizes.lbs_ipc;
}
/*
* get the subjective security ID of the current task
*/
static inline u32 current_sid(void)
{
const struct task_security_struct *tsec = selinux_cred(current_cred());
return tsec->sid;
}
static inline struct superblock_security_struct *selinux_superblock(
const struct super_block *superblock)
{
return superblock->s_security + selinux_blob_sizes.lbs_superblock;
}
#endif /* _SELINUX_OBJSEC_H_ */
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