[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/security.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 {
	char		*smk_root;
	char		*smk_floor;
	char		*smk_hat;
	char		*smk_default;
	int		smk_initialized;
};

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

/*
 * Inode smack data
 */
struct inode_smack {
	char			*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 */

/*
 * A label access rule.
 */
struct smack_rule {
	struct list_head	list;
	struct smack_known	*smk_subject;
	char			*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 */
	char			*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 */
	char			*smk_in;	/* incoming label */
	struct smack_known	*smk_out;	/* outgoing label */
};

/*
 * 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 */

/*
 * 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 ... */

/*
 * 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 (rwxatl)
 */
#define SMK_NUM_ACCESS_TYPE 6

/* 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(char *);

/*
 * These functions are in smack_access.c
 */
int smk_access_entry(char *, char *, struct list_head *);
int smk_access(struct smack_known *, char *, int, struct smk_audit_info *);
int smk_curacc(char *, 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);
char *smk_import(const char *, 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 *);
u32 smack_to_secid(const char *);

/*
 * Shared data.
 */
extern int smack_cipso_direct;
extern int smack_cipso_mapped;
extern struct smack_known *smack_net_ambient;
extern struct smack_known *smack_onlycap;
extern struct smack_known *smack_syslog_label;
extern const char *smack_cipso_option;

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 security_operations smack_ops;

#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 in an inode blob.
 */
static inline char *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;
}

/*
 * 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());
}

/*
 * Is the task privileged and allowed to be privileged
 * by the onlycap rule.
 */
static inline int smack_privileged(int cap)
{
	struct smack_known *skp = smk_of_current();

	if (!capable(cap))
		return 0;
	if (smack_onlycap == NULL || smack_onlycap == skp)
		return 1;
	return 0;
}

/*
 * 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>
076c54c5	18	#include <linux/security.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 CS	73	struct superblock_smack {
	74	char *smk_root;
	75	char *smk_floor;
	76	char *smk_hat;
	77	char *smk_default;
	78	int smk_initialized;
e114e473 CS	79	};
	80
	81	struct socket_smack {
2f823ff8 CS	82	struct smack_known smk_out; / outbound label */
	83	char smk_in; / inbound label */
	84	char smk_packet; / TCP peer label */
e114e473 CS	85	};
	86
	87	/*
	88	* Inode smack data
	89	*/
	90	struct inode_smack {
2f823ff8 CS	91	char smk_inode; / label of the fso */
	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 */
e114e473 CS	108
	109	/*
	110	* A label access rule.
	111	*/
	112	struct smack_rule {
7198e2ee	113	struct list_head list;
2f823ff8	114	struct smack_known *smk_subject;
7198e2ee EB	115	char *smk_object;
7198e2ee EB	116	int smk_access;
e114e473 CS	117	};
e114e473 CS	118
6d3dc07c CS	119	/*
	120	* An entry in the table identifying hosts.
	121	*/
	122	struct smk_netlbladdr {
7198e2ee	123	struct list_head list;
6d3dc07c CS	124	struct sockaddr_in smk_host; /* network address */
	125	struct in_addr smk_mask; /* network mask */
	126	char smk_label; / label */
	127	};
	128
c6739443 CS	129	/*
	130	* An entry in the table identifying ports.
	131	*/
	132	struct smk_port_label {
	133	struct list_head list;
	134	struct sock smk_sock; / socket initialized on */
	135	unsigned short smk_port; /* the port number */
	136	char smk_in; / incoming label */
2f823ff8	137	struct smack_known smk_out; / outgoing label */
e114e473 CS	138	};
	139
	140	/*
	141	* Mount options
	142	*/
	143	#define SMK_FSDEFAULT "smackfsdef="
	144	#define SMK_FSFLOOR "smackfsfloor="
	145	#define SMK_FSHAT "smackfshat="
	146	#define SMK_FSROOT "smackfsroot="
e830b394	147	#define SMK_FSTRANS "smackfstransmute="
e114e473	148
4303154e EB	149	#define SMACK_CIPSO_OPTION "-CIPSO"
4303154e EB	150
e114e473	151	/*
6d3dc07c CS	152	* How communications on this socket are treated.
	153	* Usually it's determined by the underlying netlabel code
	154	* but there are certain cases, including single label hosts
	155	* and potentially single label interfaces for which the
	156	* treatment can not be known in advance.
	157	*
	158	* The possibility of additional labeling schemes being
	159	* introduced in the future exists as well.
	160	*/
	161	#define SMACK_UNLABELED_SOCKET 0
	162	#define SMACK_CIPSO_SOCKET 1
	163
e114e473 CS	164	/*
	165	* CIPSO defaults.
	166	*/
	167	#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
6d3dc07c	168	#define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */
e114e473	169	#define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */
f7112e6c	170	#define SMACK_CIPSO_MAPPED_DEFAULT 251 /* Also arbitrary */
e114e473	171	#define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */
677264e8 CS	172	/*
	173	* CIPSO 2.2 standard is 239, but Smack wants to use the
	174	* categories in a structured way that limits the value to
	175	* the bits in 23 bytes, hence the unusual number.
	176	*/
	177	#define SMACK_CIPSO_MAXCATNUM 184 /* 23 * 8 */
e114e473	178
5c6d1125	179	/*
c0ab6e56 CS	180	* Flags for untraditional access modes.
	181	* It shouldn't be necessary to avoid conflicts with definitions
	182	* in fs.h, but do so anyway.
5c6d1125	183	*/
c0ab6e56 CS	184	#define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */
	185	#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
	186
e114e473 CS	187	/*
	188	* Just to make the common cases easier to deal with
	189	*/
e114e473	190	#define MAY_ANYREAD (MAY_READ \| MAY_EXEC)
e114e473 CS	191	#define MAY_READWRITE (MAY_READ \| MAY_WRITE)
	192	#define MAY_NOT 0
	193
ecfcc53f	194	/*
c0ab6e56	195	* Number of access types used by Smack (rwxatl)
ecfcc53f	196	*/
c0ab6e56	197	#define SMK_NUM_ACCESS_TYPE 6
ecfcc53f	198
3b3b0e4f EP	199	/* SMACK data */
	200	struct smack_audit_data {
	201	const char *function;
	202	char *subject;
	203	char *object;
	204	char *request;
	205	int result;
	206	};
	207
ecfcc53f EB	208	/*
	209	* Smack audit data; is empty if CONFIG_AUDIT not set
	210	* to save some stack
	211	*/
	212	struct smk_audit_info {
	213	#ifdef CONFIG_AUDIT
	214	struct common_audit_data a;
3b3b0e4f	215	struct smack_audit_data sad;
ecfcc53f EB	216	#endif
ecfcc53f EB	217	};
e114e473 CS	218	/*
	219	* These functions are in smack_lsm.c
	220	*/
	221	struct inode_smack new_inode_smack(char );
	222
	223	/*
	224	* These functions are in smack_access.c
	225	*/
7898e1f8	226	int smk_access_entry(char , char , struct list_head *);
2f823ff8	227	int smk_access(struct smack_known , char , int, struct smk_audit_info *);
ecfcc53f	228	int smk_curacc(char , u32, struct smk_audit_info );
2f823ff8	229	struct smack_known *smack_from_secid(const u32);
f7112e6c CS	230	char smk_parse_smack(const char string, int len);
f7112e6c CS	231	int smk_netlbl_mls(int, char , struct netlbl_lsm_secattr , int);
e114e473 CS	232	char smk_import(const char , int);
e114e473 CS	233	struct smack_known smk_import_entry(const char , int);
4d7cf4a1	234	void smk_insert_entry(struct smack_known *skp);
272cd7a8	235	struct smack_known smk_find_entry(const char );
e114e473 CS	236	u32 smack_to_secid(const char *);
	237
	238	/*
	239	* Shared data.
	240	*/
	241	extern int smack_cipso_direct;
f7112e6c	242	extern int smack_cipso_mapped;
2f823ff8	243	extern struct smack_known *smack_net_ambient;
00f84f3f CS	244	extern struct smack_known *smack_onlycap;
00f84f3f CS	245	extern struct smack_known *smack_syslog_label;
4303154e	246	extern const char *smack_cipso_option;
e114e473	247
e114e473 CS	248	extern struct smack_known smack_known_floor;
	249	extern struct smack_known smack_known_hat;
	250	extern struct smack_known smack_known_huh;
	251	extern struct smack_known smack_known_invalid;
	252	extern struct smack_known smack_known_star;
6d3dc07c	253	extern struct smack_known smack_known_web;
e114e473	254
f7112e6c	255	extern struct mutex smack_known_lock;
7198e2ee	256	extern struct list_head smack_known_list;
7198e2ee EB	257	extern struct list_head smk_netlbladdr_list;
7198e2ee EB	258
076c54c5	259	extern struct security_operations smack_ops;
e114e473	260
4d7cf4a1 TS	261	#define SMACK_HASH_SLOTS 16
	262	extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
	263
5c6d1125 JS	264	/*
	265	* Is the directory transmuting?
	266	*/
	267	static inline int smk_inode_transmutable(const struct inode *isp)
	268	{
	269	struct inode_smack *sip = isp->i_security;
	270	return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
	271	}
	272
e114e473 CS	273	/*
	274	* Present a pointer to the smack label in an inode blob.
	275	*/
	276	static inline char smk_of_inode(const struct inode isp)
	277	{
	278	struct inode_smack *sip = isp->i_security;
	279	return sip->smk_inode;
	280	}
	281
676dac4b	282	/*
2f823ff8	283	* Present a pointer to the smack label entry in an task blob.
676dac4b	284	*/
2f823ff8	285	static inline struct smack_known smk_of_task(const struct task_smack tsp)
676dac4b CS	286	{
	287	return tsp->smk_task;
	288	}
	289
	290	/*
2f823ff8	291	* Present a pointer to the forked smack label entry in an task blob.
676dac4b	292	*/
2f823ff8	293	static inline struct smack_known smk_of_forked(const struct task_smack tsp)
676dac4b CS	294	{
	295	return tsp->smk_forked;
	296	}
	297
	298	/*
5c6d1125	299	* Present a pointer to the smack label in the current task blob.
676dac4b	300	*/
2f823ff8	301	static inline struct smack_known *smk_of_current(void)
676dac4b CS	302	{
	303	return smk_of_task(current_security());
	304	}
	305
1880eff7 CS	306	/*
	307	* Is the task privileged and allowed to be privileged
	308	* by the onlycap rule.
	309	*/
	310	static inline int smack_privileged(int cap)
	311	{
2f823ff8 CS	312	struct smack_known *skp = smk_of_current();
2f823ff8 CS	313
1880eff7 CS	314	if (!capable(cap))
1880eff7 CS	315	return 0;
00f84f3f	316	if (smack_onlycap == NULL \|\| smack_onlycap == skp)
1880eff7 CS	317	return 1;
	318	return 0;
	319	}
	320
ecfcc53f EB	321	/*
	322	* logging functions
	323	*/
	324	#define SMACK_AUDIT_DENIED 0x1
	325	#define SMACK_AUDIT_ACCEPT 0x2
	326	extern int log_policy;
	327
	328	void smack_log(char subject_label, char object_label,
	329	int request,
	330	int result, struct smk_audit_info *auditdata);
	331
	332	#ifdef CONFIG_AUDIT
	333
	334	/*
	335	* some inline functions to set up audit data
	336	* they do nothing if CONFIG_AUDIT is not set
	337	*
	338	*/
	339	static inline void smk_ad_init(struct smk_audit_info a, const char func,
	340	char type)
	341	{
50c205f5	342	memset(&a->sad, 0, sizeof(a->sad));
ecfcc53f	343	a->a.type = type;
3b3b0e4f EP	344	a->a.smack_audit_data = &a->sad;
3b3b0e4f EP	345	a->a.smack_audit_data->function = func;
ecfcc53f EB	346	}
ecfcc53f EB	347
48c62af6 EP	348	static inline void smk_ad_init_net(struct smk_audit_info a, const char func,
	349	char type, struct lsm_network_audit *net)
	350	{
	351	smk_ad_init(a, func, type);
	352	memset(net, 0, sizeof(*net));
	353	a->a.u.net = net;
	354	}
	355
ecfcc53f EB	356	static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
	357	struct task_struct *t)
	358	{
	359	a->a.u.tsk = t;
	360	}
	361	static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
	362	struct dentry *d)
	363	{
a269434d	364	a->a.u.dentry = d;
ecfcc53f EB	365	}
	366	static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
	367	struct inode *i)
	368	{
f48b7399	369	a->a.u.inode = i;
ecfcc53f EB	370	}
	371	static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
	372	struct path p)
	373	{
f48b7399	374	a->a.u.path = p;
ecfcc53f EB	375	}
	376	static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
	377	struct sock *sk)
	378	{
48c62af6	379	a->a.u.net->sk = sk;
ecfcc53f EB	380	}
	381
	382	#else /* no AUDIT */
	383
	384	static inline void smk_ad_init(struct smk_audit_info a, const char func,
	385	char type)
	386	{
	387	}
	388	static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
	389	struct task_struct *t)
	390	{
	391	}
	392	static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
	393	struct dentry *d)
	394	{
	395	}
	396	static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
	397	struct vfsmount *m)
	398	{
	399	}
	400	static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
	401	struct inode *i)
	402	{
	403	}
	404	static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
	405	struct path p)
	406	{
	407	}
	408	static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
	409	struct sock *sk)
	410	{
	411	}
	412	#endif
	413
e114e473	414	#endif /* _SECURITY_SMACK_H */