[deliverable/linux.git] / security / smack / smack.h

/*
 * Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation, version 2.
 *
 * Author:
 *      Casey Schaufler <casey@schaufler-ca.com>
 *
 */

#ifndef _SECURITY_SMACK_H
#define _SECURITY_SMACK_H

#include <linux/capability.h>
#include <linux/spinlock.h>
#include <linux/lsm_hooks.h>
#include <linux/in.h>
#include <net/netlabel.h>
#include <linux/list.h>
#include <linux/rculist.h>
#include <linux/lsm_audit.h>

/*
 * Smack labels were limited to 23 characters for a long time.
 */
#define SMK_LABELLEN	24
#define SMK_LONGLABEL	256

/*
 * This is the repository for labels seen so that it is
 * not necessary to keep allocating tiny chuncks of memory
 * and so that they can be shared.
 *
 * Labels are never modified in place. Anytime a label
 * is imported (e.g. xattrset on a file) the list is checked
 * for it and it is added if it doesn't exist. The address
 * is passed out in either case. Entries are added, but
 * never deleted.
 *
 * Since labels are hanging around anyway it doesn't
 * hurt to maintain a secid for those awkward situations
 * where kernel components that ought to use LSM independent
 * interfaces don't. The secid should go away when all of
 * these components have been repaired.
 *
 * The cipso value associated with the label gets stored here, too.
 *
 * Keep the access rules for this subject label here so that
 * the entire set of rules does not need to be examined every
 * time.
 */
struct smack_known {
	struct list_head		list;
	struct hlist_node		smk_hashed;
	char				*smk_known;
	u32				smk_secid;
	struct netlbl_lsm_secattr	smk_netlabel;	/* on wire labels */
	struct list_head		smk_rules;	/* access rules */
	struct mutex			smk_rules_lock;	/* lock for rules */
};

/*
 * Maximum number of bytes for the levels in a CIPSO IP option.
 * Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
 * bigger than can be used, and 24 is the next lower multiple
 * of 8, and there are too many issues if there isn't space set
 * aside for the terminating null byte.
 */
#define SMK_CIPSOLEN	24

struct superblock_smack {
	struct smack_known	*smk_root;
	struct smack_known	*smk_floor;
	struct smack_known	*smk_hat;
	struct smack_known	*smk_default;
	int			smk_initialized;
};

struct socket_smack {
	struct smack_known	*smk_out;	/* outbound label */
	struct smack_known	*smk_in;	/* inbound label */
	struct smack_known	*smk_packet;	/* TCP peer label */
};

/*
 * Inode smack data
 */
struct inode_smack {
	struct smack_known	*smk_inode;	/* label of the fso */
	struct smack_known	*smk_task;	/* label of the task */
	struct smack_known	*smk_mmap;	/* label of the mmap domain */
	struct mutex		smk_lock;	/* initialization lock */
	int			smk_flags;	/* smack inode flags */
};

struct task_smack {
	struct smack_known	*smk_task;	/* label for access control */
	struct smack_known	*smk_forked;	/* label when forked */
	struct list_head	smk_rules;	/* per task access rules */
	struct mutex		smk_rules_lock;	/* lock for the rules */
};

#define	SMK_INODE_INSTANT	0x01	/* inode is instantiated */
#define	SMK_INODE_TRANSMUTE	0x02	/* directory is transmuting */
#define	SMK_INODE_CHANGED	0x04	/* smack was transmuted */
#define	SMK_INODE_IMPURE	0x08	/* involved in an impure transaction */

/*
 * A label access rule.
 */
struct smack_rule {
	struct list_head	list;
	struct smack_known	*smk_subject;
	struct smack_known	*smk_object;
	int			smk_access;
};

/*
 * An entry in the table identifying hosts.
 */
struct smk_netlbladdr {
	struct list_head	list;
	struct sockaddr_in	smk_host;	/* network address */
	struct in_addr		smk_mask;	/* network mask */
	struct smack_known	*smk_label;	/* label */
};

/*
 * An entry in the table identifying ports.
 */
struct smk_port_label {
	struct list_head	list;
	struct sock		*smk_sock;	/* socket initialized on */
	unsigned short		smk_port;	/* the port number */
	struct smack_known	*smk_in;	/* inbound label */
	struct smack_known	*smk_out;	/* outgoing label */
};

struct smack_onlycap {
	struct list_head	list;
	struct smack_known	*smk_label;
};

/* Super block security struct flags for mount options */
#define FSDEFAULT_MNT	0x01
#define FSFLOOR_MNT	0x02
#define FSHAT_MNT	0x04
#define FSROOT_MNT	0x08
#define FSTRANS_MNT	0x10

#define NUM_SMK_MNT_OPTS	5

enum {
	Opt_error = -1,
	Opt_fsdefault = 1,
	Opt_fsfloor = 2,
	Opt_fshat = 3,
	Opt_fsroot = 4,
	Opt_fstransmute = 5,
};

/*
 * Mount options
 */
#define SMK_FSDEFAULT	"smackfsdef="
#define SMK_FSFLOOR	"smackfsfloor="
#define SMK_FSHAT	"smackfshat="
#define SMK_FSROOT	"smackfsroot="
#define SMK_FSTRANS	"smackfstransmute="

#define SMACK_CIPSO_OPTION 	"-CIPSO"

/*
 * How communications on this socket are treated.
 * Usually it's determined by the underlying netlabel code
 * but there are certain cases, including single label hosts
 * and potentially single label interfaces for which the
 * treatment can not be known in advance.
 *
 * The possibility of additional labeling schemes being
 * introduced in the future exists as well.
 */
#define SMACK_UNLABELED_SOCKET	0
#define SMACK_CIPSO_SOCKET	1

/*
 * CIPSO defaults.
 */
#define SMACK_CIPSO_DOI_DEFAULT		3	/* Historical */
#define SMACK_CIPSO_DOI_INVALID		-1	/* Not a DOI */
#define SMACK_CIPSO_DIRECT_DEFAULT	250	/* Arbitrary */
#define SMACK_CIPSO_MAPPED_DEFAULT	251	/* Also arbitrary */
#define SMACK_CIPSO_MAXLEVEL            255     /* CIPSO 2.2 standard */
/*
 * CIPSO 2.2 standard is 239, but Smack wants to use the
 * categories in a structured way that limits the value to
 * the bits in 23 bytes, hence the unusual number.
 */
#define SMACK_CIPSO_MAXCATNUM           184     /* 23 * 8 */

/*
 * Ptrace rules
 */
#define SMACK_PTRACE_DEFAULT	0
#define SMACK_PTRACE_EXACT	1
#define SMACK_PTRACE_DRACONIAN	2
#define SMACK_PTRACE_MAX	SMACK_PTRACE_DRACONIAN

/*
 * Flags for untraditional access modes.
 * It shouldn't be necessary to avoid conflicts with definitions
 * in fs.h, but do so anyway.
 */
#define MAY_TRANSMUTE	0x00001000	/* Controls directory labeling */
#define MAY_LOCK	0x00002000	/* Locks should be writes, but ... */
#define MAY_BRINGUP	0x00004000	/* Report use of this rule */

#define SMACK_BRINGUP_ALLOW		1	/* Allow bringup mode */
#define SMACK_UNCONFINED_SUBJECT	2	/* Allow unconfined label */
#define SMACK_UNCONFINED_OBJECT		3	/* Allow unconfined label */

/*
 * Just to make the common cases easier to deal with
 */
#define MAY_ANYREAD	(MAY_READ | MAY_EXEC)
#define MAY_READWRITE	(MAY_READ | MAY_WRITE)
#define MAY_NOT		0

/*
 * Number of access types used by Smack (rwxatlb)
 */
#define SMK_NUM_ACCESS_TYPE 7

/* SMACK data */
struct smack_audit_data {
	const char *function;
	char *subject;
	char *object;
	char *request;
	int result;
};

/*
 * Smack audit data; is empty if CONFIG_AUDIT not set
 * to save some stack
 */
struct smk_audit_info {
#ifdef CONFIG_AUDIT
	struct common_audit_data a;
	struct smack_audit_data sad;
#endif
};
/*
 * These functions are in smack_lsm.c
 */
struct inode_smack *new_inode_smack(struct smack_known *);

/*
 * These functions are in smack_access.c
 */
int smk_access_entry(char *, char *, struct list_head *);
int smk_access(struct smack_known *, struct smack_known *,
	       int, struct smk_audit_info *);
int smk_tskacc(struct task_smack *, struct smack_known *,
	       u32, struct smk_audit_info *);
int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
struct smack_known *smack_from_secid(const u32);
char *smk_parse_smack(const char *string, int len);
int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
struct smack_known *smk_import_entry(const char *, int);
void smk_insert_entry(struct smack_known *skp);
struct smack_known *smk_find_entry(const char *);
int smack_privileged(int cap);

/*
 * Shared data.
 */
extern int smack_enabled;
extern int smack_cipso_direct;
extern int smack_cipso_mapped;
extern struct smack_known *smack_net_ambient;
extern struct smack_known *smack_syslog_label;
#ifdef CONFIG_SECURITY_SMACK_BRINGUP
extern struct smack_known *smack_unconfined;
#endif
extern struct smack_known smack_cipso_option;
extern int smack_ptrace_rule;

extern struct smack_known smack_known_floor;
extern struct smack_known smack_known_hat;
extern struct smack_known smack_known_huh;
extern struct smack_known smack_known_invalid;
extern struct smack_known smack_known_star;
extern struct smack_known smack_known_web;

extern struct mutex	smack_known_lock;
extern struct list_head smack_known_list;
extern struct list_head smk_netlbladdr_list;

extern struct mutex     smack_onlycap_lock;
extern struct list_head smack_onlycap_list;

#define SMACK_HASH_SLOTS 16
extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];

/*
 * Is the directory transmuting?
 */
static inline int smk_inode_transmutable(const struct inode *isp)
{
	struct inode_smack *sip = isp->i_security;
	return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
}

/*
 * Present a pointer to the smack label entry in an inode blob.
 */
static inline struct smack_known *smk_of_inode(const struct inode *isp)
{
	struct inode_smack *sip = isp->i_security;
	return sip->smk_inode;
}

/*
 * Present a pointer to the smack label entry in an task blob.
 */
static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
{
	return tsp->smk_task;
}

static inline struct smack_known *smk_of_task_struct(const struct task_struct *t)
{
	struct smack_known *skp;

	rcu_read_lock();
	skp = smk_of_task(__task_cred(t)->security);
	rcu_read_unlock();
	return skp;
}

/*
 * Present a pointer to the forked smack label entry in an task blob.
 */
static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
{
	return tsp->smk_forked;
}

/*
 * Present a pointer to the smack label in the current task blob.
 */
static inline struct smack_known *smk_of_current(void)
{
	return smk_of_task(current_security());
}

/*
 * logging functions
 */
#define SMACK_AUDIT_DENIED 0x1
#define SMACK_AUDIT_ACCEPT 0x2
extern int log_policy;

void smack_log(char *subject_label, char *object_label,
		int request,
		int result, struct smk_audit_info *auditdata);

#ifdef CONFIG_AUDIT

/*
 * some inline functions to set up audit data
 * they do nothing if CONFIG_AUDIT is not set
 *
 */
static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
			       char type)
{
	memset(&a->sad, 0, sizeof(a->sad));
	a->a.type = type;
	a->a.smack_audit_data = &a->sad;
	a->a.smack_audit_data->function = func;
}

static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func,
				   char type, struct lsm_network_audit *net)
{
	smk_ad_init(a, func, type);
	memset(net, 0, sizeof(*net));
	a->a.u.net = net;
}

static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
					 struct task_struct *t)
{
	a->a.u.tsk = t;
}
static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
						    struct dentry *d)
{
	a->a.u.dentry = d;
}
static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
					      struct inode *i)
{
	a->a.u.inode = i;
}
static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
					     struct path p)
{
	a->a.u.path = p;
}
static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
					    struct sock *sk)
{
	a->a.u.net->sk = sk;
}

#else /* no AUDIT */

static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
			       char type)
{
}
static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
					 struct task_struct *t)
{
}
static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
						    struct dentry *d)
{
}
static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
						 struct vfsmount *m)
{
}
static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
					      struct inode *i)
{
}
static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
					     struct path p)
{
}
static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
					    struct sock *sk)
{
}
#endif

#endif  /* _SECURITY_SMACK_H */
Commit	Line	Data
e114e473 CS	1	/*
	2	* Copyright (C) 2007 Casey Schaufler <casey@schaufler-ca.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation, version 2.
	7	*
	8	* Author:
	9	* Casey Schaufler <casey@schaufler-ca.com>
	10	*
	11	*/
	12
	13	#ifndef _SECURITY_SMACK_H
	14	#define _SECURITY_SMACK_H
	15
	16	#include <linux/capability.h>
	17	#include <linux/spinlock.h>
3c4ed7bd	18	#include <linux/lsm_hooks.h>
6d3dc07c	19	#include <linux/in.h>
e114e473	20	#include <net/netlabel.h>
7198e2ee EB	21	#include <linux/list.h>
7198e2ee EB	22	#include <linux/rculist.h>
ecfcc53f	23	#include <linux/lsm_audit.h>
e114e473 CS	24
e114e473 CS	25	/*
f7112e6c CS	26	* Smack labels were limited to 23 characters for a long time.
	27	*/
	28	#define SMK_LABELLEN 24
	29	#define SMK_LONGLABEL 256
	30
2f823ff8 CS	31	/*
	32	* This is the repository for labels seen so that it is
	33	* not necessary to keep allocating tiny chuncks of memory
	34	* and so that they can be shared.
	35	*
	36	* Labels are never modified in place. Anytime a label
	37	* is imported (e.g. xattrset on a file) the list is checked
	38	* for it and it is added if it doesn't exist. The address
	39	* is passed out in either case. Entries are added, but
	40	* never deleted.
	41	*
	42	* Since labels are hanging around anyway it doesn't
	43	* hurt to maintain a secid for those awkward situations
	44	* where kernel components that ought to use LSM independent
	45	* interfaces don't. The secid should go away when all of
	46	* these components have been repaired.
	47	*
	48	* The cipso value associated with the label gets stored here, too.
	49	*
	50	* Keep the access rules for this subject label here so that
	51	* the entire set of rules does not need to be examined every
	52	* time.
	53	*/
	54	struct smack_known {
	55	struct list_head list;
4d7cf4a1	56	struct hlist_node smk_hashed;
2f823ff8 CS	57	char *smk_known;
	58	u32 smk_secid;
	59	struct netlbl_lsm_secattr smk_netlabel; /* on wire labels */
	60	struct list_head smk_rules; /* access rules */
	61	struct mutex smk_rules_lock; /* lock for rules */
	62	};
	63
f7112e6c CS	64	/*
f7112e6c CS	65	* Maximum number of bytes for the levels in a CIPSO IP option.
e114e473 CS	66	* Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
	67	* bigger than can be used, and 24 is the next lower multiple
	68	* of 8, and there are too many issues if there isn't space set
	69	* aside for the terminating null byte.
	70	*/
f7112e6c	71	#define SMK_CIPSOLEN 24
e114e473	72
e114e473	73	struct superblock_smack {
21c7eae2 LP	74	struct smack_known *smk_root;
	75	struct smack_known *smk_floor;
	76	struct smack_known *smk_hat;
	77	struct smack_known *smk_default;
	78	int smk_initialized;
e114e473 CS	79	};
	80
	81	struct socket_smack {
2f823ff8	82	struct smack_known smk_out; / outbound label */
54e70ec5 CS	83	struct smack_known smk_in; / inbound label */
54e70ec5 CS	84	struct smack_known smk_packet; / TCP peer label */
e114e473 CS	85	};
	86
	87	/*
	88	* Inode smack data
	89	*/
	90	struct inode_smack {
21c7eae2	91	struct smack_known smk_inode; / label of the fso */
2f823ff8 CS	92	struct smack_known smk_task; / label of the task */
	93	struct smack_known smk_mmap; / label of the mmap domain */
	94	struct mutex smk_lock; /* initialization lock */
	95	int smk_flags; /* smack inode flags */
e114e473 CS	96	};
e114e473 CS	97
676dac4b	98	struct task_smack {
2f823ff8 CS	99	struct smack_known smk_task; / label for access control */
2f823ff8 CS	100	struct smack_known smk_forked; / label when forked */
7898e1f8 CS	101	struct list_head smk_rules; /* per task access rules */
7898e1f8 CS	102	struct mutex smk_rules_lock; /* lock for the rules */
676dac4b CS	103	};
676dac4b CS	104
e114e473	105	#define SMK_INODE_INSTANT 0x01 /* inode is instantiated */
5c6d1125	106	#define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */
2267b13a	107	#define SMK_INODE_CHANGED 0x04 /* smack was transmuted */
bf4b2fee	108	#define SMK_INODE_IMPURE 0x08 /* involved in an impure transaction */
e114e473 CS	109
	110	/*
	111	* A label access rule.
	112	*/
	113	struct smack_rule {
7198e2ee	114	struct list_head list;
2f823ff8	115	struct smack_known *smk_subject;
21c7eae2	116	struct smack_known *smk_object;
7198e2ee	117	int smk_access;
e114e473 CS	118	};
e114e473 CS	119
6d3dc07c CS	120	/*
	121	* An entry in the table identifying hosts.
	122	*/
	123	struct smk_netlbladdr {
7198e2ee	124	struct list_head list;
6d3dc07c CS	125	struct sockaddr_in smk_host; /* network address */
6d3dc07c CS	126	struct in_addr smk_mask; /* network mask */
21c7eae2	127	struct smack_known smk_label; / label */
6d3dc07c CS	128	};
6d3dc07c CS	129
c6739443 CS	130	/*
	131	* An entry in the table identifying ports.
	132	*/
	133	struct smk_port_label {
	134	struct list_head list;
	135	struct sock smk_sock; / socket initialized on */
	136	unsigned short smk_port; /* the port number */
54e70ec5	137	struct smack_known smk_in; / inbound label */
2f823ff8	138	struct smack_known smk_out; / outgoing label */
e114e473 CS	139	};
e114e473 CS	140
c0d77c88 RK	141	struct smack_onlycap {
	142	struct list_head list;
	143	struct smack_known *smk_label;
	144	};
	145
3bf2789c VT	146	/* Super block security struct flags for mount options */
	147	#define FSDEFAULT_MNT 0x01
	148	#define FSFLOOR_MNT 0x02
	149	#define FSHAT_MNT 0x04
	150	#define FSROOT_MNT 0x08
	151	#define FSTRANS_MNT 0x10
	152
	153	#define NUM_SMK_MNT_OPTS 5
	154
	155	enum {
	156	Opt_error = -1,
	157	Opt_fsdefault = 1,
	158	Opt_fsfloor = 2,
	159	Opt_fshat = 3,
	160	Opt_fsroot = 4,
	161	Opt_fstransmute = 5,
	162	};
	163
e114e473 CS	164	/*
	165	* Mount options
	166	*/
	167	#define SMK_FSDEFAULT "smackfsdef="
	168	#define SMK_FSFLOOR "smackfsfloor="
	169	#define SMK_FSHAT "smackfshat="
	170	#define SMK_FSROOT "smackfsroot="
e830b394	171	#define SMK_FSTRANS "smackfstransmute="
e114e473	172
4303154e EB	173	#define SMACK_CIPSO_OPTION "-CIPSO"
4303154e EB	174
e114e473	175	/*
6d3dc07c CS	176	* How communications on this socket are treated.
	177	* Usually it's determined by the underlying netlabel code
	178	* but there are certain cases, including single label hosts
	179	* and potentially single label interfaces for which the
	180	* treatment can not be known in advance.
	181	*
	182	* The possibility of additional labeling schemes being
	183	* introduced in the future exists as well.
	184	*/
	185	#define SMACK_UNLABELED_SOCKET 0
	186	#define SMACK_CIPSO_SOCKET 1
	187
e114e473 CS	188	/*
	189	* CIPSO defaults.
	190	*/
	191	#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
6d3dc07c	192	#define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */
e114e473	193	#define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */
f7112e6c	194	#define SMACK_CIPSO_MAPPED_DEFAULT 251 /* Also arbitrary */
e114e473	195	#define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */
677264e8 CS	196	/*
	197	* CIPSO 2.2 standard is 239, but Smack wants to use the
	198	* categories in a structured way that limits the value to
	199	* the bits in 23 bytes, hence the unusual number.
	200	*/
	201	#define SMACK_CIPSO_MAXCATNUM 184 /* 23 * 8 */
e114e473	202
66867818 LP	203	/*
	204	* Ptrace rules
	205	*/
	206	#define SMACK_PTRACE_DEFAULT 0
	207	#define SMACK_PTRACE_EXACT 1
	208	#define SMACK_PTRACE_DRACONIAN 2
	209	#define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN
	210
5c6d1125	211	/*
c0ab6e56 CS	212	* Flags for untraditional access modes.
	213	* It shouldn't be necessary to avoid conflicts with definitions
	214	* in fs.h, but do so anyway.
5c6d1125	215	*/
c0ab6e56 CS	216	#define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */
c0ab6e56 CS	217	#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
d166c802	218	#define MAY_BRINGUP 0x00004000 /* Report use of this rule */
c0ab6e56	219
bf4b2fee CS	220	#define SMACK_BRINGUP_ALLOW 1 /* Allow bringup mode */
	221	#define SMACK_UNCONFINED_SUBJECT 2 /* Allow unconfined label */
	222	#define SMACK_UNCONFINED_OBJECT 3 /* Allow unconfined label */
	223
e114e473 CS	224	/*
	225	* Just to make the common cases easier to deal with
	226	*/
e114e473	227	#define MAY_ANYREAD (MAY_READ \| MAY_EXEC)
e114e473 CS	228	#define MAY_READWRITE (MAY_READ \| MAY_WRITE)
	229	#define MAY_NOT 0
	230
ecfcc53f	231	/*
d166c802	232	* Number of access types used by Smack (rwxatlb)
ecfcc53f	233	*/
d166c802	234	#define SMK_NUM_ACCESS_TYPE 7
ecfcc53f	235
3b3b0e4f EP	236	/* SMACK data */
	237	struct smack_audit_data {
	238	const char *function;
	239	char *subject;
	240	char *object;
	241	char *request;
	242	int result;
	243	};
	244
ecfcc53f EB	245	/*
	246	* Smack audit data; is empty if CONFIG_AUDIT not set
	247	* to save some stack
	248	*/
	249	struct smk_audit_info {
	250	#ifdef CONFIG_AUDIT
	251	struct common_audit_data a;
3b3b0e4f	252	struct smack_audit_data sad;
ecfcc53f EB	253	#endif
ecfcc53f EB	254	};
e114e473 CS	255	/*
	256	* These functions are in smack_lsm.c
	257	*/
21c7eae2	258	struct inode_smack new_inode_smack(struct smack_known );
e114e473 CS	259
	260	/*
	261	* These functions are in smack_access.c
	262	*/
7898e1f8	263	int smk_access_entry(char , char , struct list_head *);
21c7eae2 LP	264	int smk_access(struct smack_known , struct smack_known ,
	265	int, struct smk_audit_info *);
	266	int smk_tskacc(struct task_smack , struct smack_known ,
	267	u32, struct smk_audit_info *);
	268	int smk_curacc(struct smack_known , u32, struct smk_audit_info );
2f823ff8	269	struct smack_known *smack_from_secid(const u32);
f7112e6c CS	270	char smk_parse_smack(const char string, int len);
f7112e6c CS	271	int smk_netlbl_mls(int, char , struct netlbl_lsm_secattr , int);
e114e473	272	struct smack_known smk_import_entry(const char , int);
4d7cf4a1	273	void smk_insert_entry(struct smack_known *skp);
272cd7a8	274	struct smack_known smk_find_entry(const char );
c0d77c88	275	int smack_privileged(int cap);
e114e473 CS	276
	277	/*
	278	* Shared data.
	279	*/
69f287ae	280	extern int smack_enabled;
e114e473	281	extern int smack_cipso_direct;
f7112e6c	282	extern int smack_cipso_mapped;
2f823ff8	283	extern struct smack_known *smack_net_ambient;
00f84f3f	284	extern struct smack_known *smack_syslog_label;
bf4b2fee CS	285	#ifdef CONFIG_SECURITY_SMACK_BRINGUP
	286	extern struct smack_known *smack_unconfined;
	287	#endif
21c7eae2	288	extern struct smack_known smack_cipso_option;
66867818	289	extern int smack_ptrace_rule;
e114e473	290
e114e473 CS	291	extern struct smack_known smack_known_floor;
	292	extern struct smack_known smack_known_hat;
	293	extern struct smack_known smack_known_huh;
	294	extern struct smack_known smack_known_invalid;
	295	extern struct smack_known smack_known_star;
6d3dc07c	296	extern struct smack_known smack_known_web;
e114e473	297
f7112e6c	298	extern struct mutex smack_known_lock;
7198e2ee	299	extern struct list_head smack_known_list;
7198e2ee EB	300	extern struct list_head smk_netlbladdr_list;
7198e2ee EB	301
c0d77c88 RK	302	extern struct mutex smack_onlycap_lock;
	303	extern struct list_head smack_onlycap_list;
	304
4d7cf4a1 TS	305	#define SMACK_HASH_SLOTS 16
	306	extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
	307
5c6d1125 JS	308	/*
	309	* Is the directory transmuting?
	310	*/
	311	static inline int smk_inode_transmutable(const struct inode *isp)
	312	{
	313	struct inode_smack *sip = isp->i_security;
	314	return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
	315	}
	316
e114e473	317	/*
21c7eae2	318	* Present a pointer to the smack label entry in an inode blob.
e114e473	319	*/
21c7eae2	320	static inline struct smack_known smk_of_inode(const struct inode isp)
e114e473 CS	321	{
	322	struct inode_smack *sip = isp->i_security;
	323	return sip->smk_inode;
	324	}
	325
676dac4b	326	/*
2f823ff8	327	* Present a pointer to the smack label entry in an task blob.
676dac4b	328	*/
2f823ff8	329	static inline struct smack_known smk_of_task(const struct task_smack tsp)
676dac4b CS	330	{
	331	return tsp->smk_task;
	332	}
	333
6d1cff2a AR	334	static inline struct smack_known smk_of_task_struct(const struct task_struct t)
	335	{
	336	struct smack_known *skp;
	337
	338	rcu_read_lock();
	339	skp = smk_of_task(__task_cred(t)->security);
	340	rcu_read_unlock();
	341	return skp;
	342	}
	343
676dac4b	344	/*
2f823ff8	345	* Present a pointer to the forked smack label entry in an task blob.
676dac4b	346	*/
2f823ff8	347	static inline struct smack_known smk_of_forked(const struct task_smack tsp)
676dac4b CS	348	{
	349	return tsp->smk_forked;
	350	}
	351
	352	/*
5c6d1125	353	* Present a pointer to the smack label in the current task blob.
676dac4b	354	*/
2f823ff8	355	static inline struct smack_known *smk_of_current(void)
676dac4b CS	356	{
	357	return smk_of_task(current_security());
	358	}
	359
ecfcc53f EB	360	/*
	361	* logging functions
	362	*/
	363	#define SMACK_AUDIT_DENIED 0x1
	364	#define SMACK_AUDIT_ACCEPT 0x2
	365	extern int log_policy;
	366
	367	void smack_log(char subject_label, char object_label,
	368	int request,
	369	int result, struct smk_audit_info *auditdata);
	370
	371	#ifdef CONFIG_AUDIT
	372
	373	/*
	374	* some inline functions to set up audit data
	375	* they do nothing if CONFIG_AUDIT is not set
	376	*
	377	*/
	378	static inline void smk_ad_init(struct smk_audit_info a, const char func,
	379	char type)
	380	{
50c205f5	381	memset(&a->sad, 0, sizeof(a->sad));
ecfcc53f	382	a->a.type = type;
3b3b0e4f EP	383	a->a.smack_audit_data = &a->sad;
3b3b0e4f EP	384	a->a.smack_audit_data->function = func;
ecfcc53f EB	385	}
ecfcc53f EB	386
48c62af6 EP	387	static inline void smk_ad_init_net(struct smk_audit_info a, const char func,
	388	char type, struct lsm_network_audit *net)
	389	{
	390	smk_ad_init(a, func, type);
	391	memset(net, 0, sizeof(*net));
	392	a->a.u.net = net;
	393	}
	394
ecfcc53f EB	395	static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
	396	struct task_struct *t)
	397	{
	398	a->a.u.tsk = t;
	399	}
	400	static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
	401	struct dentry *d)
	402	{
a269434d	403	a->a.u.dentry = d;
ecfcc53f EB	404	}
	405	static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
	406	struct inode *i)
	407	{
f48b7399	408	a->a.u.inode = i;
ecfcc53f EB	409	}
	410	static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
	411	struct path p)
	412	{
f48b7399	413	a->a.u.path = p;
ecfcc53f EB	414	}
	415	static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
	416	struct sock *sk)
	417	{
48c62af6	418	a->a.u.net->sk = sk;
ecfcc53f EB	419	}
	420
	421	#else /* no AUDIT */
	422
	423	static inline void smk_ad_init(struct smk_audit_info a, const char func,
	424	char type)
	425	{
	426	}
	427	static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
	428	struct task_struct *t)
	429	{
	430	}
	431	static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
	432	struct dentry *d)
	433	{
	434	}
	435	static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
	436	struct vfsmount *m)
	437	{
	438	}
	439	static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
	440	struct inode *i)
	441	{
	442	}
	443	static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
	444	struct path p)
	445	{
	446	}
	447	static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
	448	struct sock *sk)
	449	{
	450	}
	451	#endif
	452
e114e473	453	#endif /* _SECURITY_SMACK_H */