[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 {
	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 */

/*
 * 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 */
};

/*
 * 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 */

/*
 * 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 *);

/*
 * 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_onlycap;
extern struct smack_known *smack_syslog_label;
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 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 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;
}

/*
 * 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	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 */
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;
21c7eae2	115	struct smack_known *smk_object;
7198e2ee	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 */
6d3dc07c CS	125	struct in_addr smk_mask; /* network mask */
21c7eae2	126	struct smack_known smk_label; / label */
6d3dc07c CS	127	};
6d3dc07c CS	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 */
54e70ec5	136	struct smack_known smk_in; / inbound 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
66867818 LP	179	/*
	180	* Ptrace rules
	181	*/
	182	#define SMACK_PTRACE_DEFAULT 0
	183	#define SMACK_PTRACE_EXACT 1
	184	#define SMACK_PTRACE_DRACONIAN 2
	185	#define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN
	186
5c6d1125	187	/*
c0ab6e56 CS	188	* Flags for untraditional access modes.
	189	* It shouldn't be necessary to avoid conflicts with definitions
	190	* in fs.h, but do so anyway.
5c6d1125	191	*/
c0ab6e56 CS	192	#define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */
c0ab6e56 CS	193	#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
d166c802	194	#define MAY_BRINGUP 0x00004000 /* Report use of this rule */
c0ab6e56	195
e114e473 CS	196	/*
	197	* Just to make the common cases easier to deal with
	198	*/
e114e473	199	#define MAY_ANYREAD (MAY_READ \| MAY_EXEC)
e114e473 CS	200	#define MAY_READWRITE (MAY_READ \| MAY_WRITE)
	201	#define MAY_NOT 0
	202
ecfcc53f	203	/*
d166c802	204	* Number of access types used by Smack (rwxatlb)
ecfcc53f	205	*/
d166c802	206	#define SMK_NUM_ACCESS_TYPE 7
ecfcc53f	207
3b3b0e4f EP	208	/* SMACK data */
	209	struct smack_audit_data {
	210	const char *function;
	211	char *subject;
	212	char *object;
	213	char *request;
	214	int result;
	215	};
	216
ecfcc53f EB	217	/*
	218	* Smack audit data; is empty if CONFIG_AUDIT not set
	219	* to save some stack
	220	*/
	221	struct smk_audit_info {
	222	#ifdef CONFIG_AUDIT
	223	struct common_audit_data a;
3b3b0e4f	224	struct smack_audit_data sad;
ecfcc53f EB	225	#endif
ecfcc53f EB	226	};
e114e473 CS	227	/*
	228	* These functions are in smack_lsm.c
	229	*/
21c7eae2	230	struct inode_smack new_inode_smack(struct smack_known );
e114e473 CS	231
	232	/*
	233	* These functions are in smack_access.c
	234	*/
7898e1f8	235	int smk_access_entry(char , char , struct list_head *);
21c7eae2 LP	236	int smk_access(struct smack_known , struct smack_known ,
	237	int, struct smk_audit_info *);
	238	int smk_tskacc(struct task_smack , struct smack_known ,
	239	u32, struct smk_audit_info *);
	240	int smk_curacc(struct smack_known , u32, struct smk_audit_info );
2f823ff8	241	struct smack_known *smack_from_secid(const u32);
f7112e6c CS	242	char smk_parse_smack(const char string, int len);
f7112e6c CS	243	int smk_netlbl_mls(int, char , struct netlbl_lsm_secattr , int);
e114e473	244	struct smack_known smk_import_entry(const char , int);
4d7cf4a1	245	void smk_insert_entry(struct smack_known *skp);
272cd7a8	246	struct smack_known smk_find_entry(const char );
e114e473 CS	247
	248	/*
	249	* Shared data.
	250	*/
69f287ae	251	extern int smack_enabled;
e114e473	252	extern int smack_cipso_direct;
f7112e6c	253	extern int smack_cipso_mapped;
2f823ff8	254	extern struct smack_known *smack_net_ambient;
00f84f3f CS	255	extern struct smack_known *smack_onlycap;
00f84f3f CS	256	extern struct smack_known *smack_syslog_label;
21c7eae2	257	extern struct smack_known smack_cipso_option;
66867818	258	extern int smack_ptrace_rule;
e114e473	259
e114e473 CS	260	extern struct smack_known smack_known_floor;
	261	extern struct smack_known smack_known_hat;
	262	extern struct smack_known smack_known_huh;
	263	extern struct smack_known smack_known_invalid;
	264	extern struct smack_known smack_known_star;
6d3dc07c	265	extern struct smack_known smack_known_web;
e114e473	266
f7112e6c	267	extern struct mutex smack_known_lock;
7198e2ee	268	extern struct list_head smack_known_list;
7198e2ee EB	269	extern struct list_head smk_netlbladdr_list;
7198e2ee EB	270
076c54c5	271	extern struct security_operations smack_ops;
e114e473	272
4d7cf4a1 TS	273	#define SMACK_HASH_SLOTS 16
	274	extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
	275
5c6d1125 JS	276	/*
	277	* Is the directory transmuting?
	278	*/
	279	static inline int smk_inode_transmutable(const struct inode *isp)
	280	{
	281	struct inode_smack *sip = isp->i_security;
	282	return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
	283	}
	284
e114e473	285	/*
21c7eae2	286	* Present a pointer to the smack label entry in an inode blob.
e114e473	287	*/
21c7eae2	288	static inline struct smack_known smk_of_inode(const struct inode isp)
e114e473 CS	289	{
	290	struct inode_smack *sip = isp->i_security;
	291	return sip->smk_inode;
	292	}
	293
676dac4b	294	/*
2f823ff8	295	* Present a pointer to the smack label entry in an task blob.
676dac4b	296	*/
2f823ff8	297	static inline struct smack_known smk_of_task(const struct task_smack tsp)
676dac4b CS	298	{
	299	return tsp->smk_task;
	300	}
	301
	302	/*
2f823ff8	303	* Present a pointer to the forked smack label entry in an task blob.
676dac4b	304	*/
2f823ff8	305	static inline struct smack_known smk_of_forked(const struct task_smack tsp)
676dac4b CS	306	{
	307	return tsp->smk_forked;
	308	}
	309
	310	/*
5c6d1125	311	* Present a pointer to the smack label in the current task blob.
676dac4b	312	*/
2f823ff8	313	static inline struct smack_known *smk_of_current(void)
676dac4b CS	314	{
	315	return smk_of_task(current_security());
	316	}
	317
1880eff7 CS	318	/*
	319	* Is the task privileged and allowed to be privileged
	320	* by the onlycap rule.
	321	*/
	322	static inline int smack_privileged(int cap)
	323	{
2f823ff8 CS	324	struct smack_known *skp = smk_of_current();
2f823ff8 CS	325
1880eff7 CS	326	if (!capable(cap))
1880eff7 CS	327	return 0;
00f84f3f	328	if (smack_onlycap == NULL \|\| smack_onlycap == skp)
1880eff7 CS	329	return 1;
	330	return 0;
	331	}
	332
ecfcc53f EB	333	/*
	334	* logging functions
	335	*/
	336	#define SMACK_AUDIT_DENIED 0x1
	337	#define SMACK_AUDIT_ACCEPT 0x2
	338	extern int log_policy;
	339
	340	void smack_log(char subject_label, char object_label,
	341	int request,
	342	int result, struct smk_audit_info *auditdata);
	343
	344	#ifdef CONFIG_AUDIT
	345
	346	/*
	347	* some inline functions to set up audit data
	348	* they do nothing if CONFIG_AUDIT is not set
	349	*
	350	*/
	351	static inline void smk_ad_init(struct smk_audit_info a, const char func,
	352	char type)
	353	{
50c205f5	354	memset(&a->sad, 0, sizeof(a->sad));
ecfcc53f	355	a->a.type = type;
3b3b0e4f EP	356	a->a.smack_audit_data = &a->sad;
3b3b0e4f EP	357	a->a.smack_audit_data->function = func;
ecfcc53f EB	358	}
ecfcc53f EB	359
48c62af6 EP	360	static inline void smk_ad_init_net(struct smk_audit_info a, const char func,
	361	char type, struct lsm_network_audit *net)
	362	{
	363	smk_ad_init(a, func, type);
	364	memset(net, 0, sizeof(*net));
	365	a->a.u.net = net;
	366	}
	367
ecfcc53f EB	368	static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
	369	struct task_struct *t)
	370	{
	371	a->a.u.tsk = t;
	372	}
	373	static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
	374	struct dentry *d)
	375	{
a269434d	376	a->a.u.dentry = d;
ecfcc53f EB	377	}
	378	static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
	379	struct inode *i)
	380	{
f48b7399	381	a->a.u.inode = i;
ecfcc53f EB	382	}
	383	static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
	384	struct path p)
	385	{
f48b7399	386	a->a.u.path = p;
ecfcc53f EB	387	}
	388	static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
	389	struct sock *sk)
	390	{
48c62af6	391	a->a.u.net->sk = sk;
ecfcc53f EB	392	}
	393
	394	#else /* no AUDIT */
	395
	396	static inline void smk_ad_init(struct smk_audit_info a, const char func,
	397	char type)
	398	{
	399	}
	400	static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
	401	struct task_struct *t)
	402	{
	403	}
	404	static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
	405	struct dentry *d)
	406	{
	407	}
	408	static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
	409	struct vfsmount *m)
	410	{
	411	}
	412	static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
	413	struct inode *i)
	414	{
	415	}
	416	static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
	417	struct path p)
	418	{
	419	}
	420	static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
	421	struct sock *sk)
	422	{
	423	}
	424	#endif
	425
e114e473	426	#endif /* _SECURITY_SMACK_H */