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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>
18#include <linux/security.h>
19#include <linux/in.h>
20#include <net/netlabel.h>
21#include <linux/list.h>
22#include <linux/rculist.h>
23#include <linux/lsm_audit.h>
24
25/*
26 * Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
27 * bigger than can be used, and 24 is the next lower multiple
28 * of 8, and there are too many issues if there isn't space set
29 * aside for the terminating null byte.
30 */
31#define SMK_MAXLEN 23
32#define SMK_LABELLEN (SMK_MAXLEN+1)
33
34struct superblock_smack {
35 char *smk_root;
36 char *smk_floor;
37 char *smk_hat;
38 char *smk_default;
39 int smk_initialized;
40 spinlock_t smk_sblock; /* for initialization */
41};
42
43struct socket_smack {
44 char *smk_out; /* outbound label */
45 char *smk_in; /* inbound label */
46 char smk_packet[SMK_LABELLEN]; /* TCP peer label */
47};
48
49/*
50 * Inode smack data
51 */
52struct inode_smack {
53 char *smk_inode; /* label of the fso */
54 char *smk_task; /* label of the task */
55 char *smk_mmap; /* label of the mmap domain */
56 struct mutex smk_lock; /* initialization lock */
57 int smk_flags; /* smack inode flags */
58};
59
60struct task_smack {
61 char *smk_task; /* label for access control */
62 char *smk_forked; /* label when forked */
63 struct list_head smk_rules; /* per task access rules */
64 struct mutex smk_rules_lock; /* lock for the rules */
65};
66
67#define SMK_INODE_INSTANT 0x01 /* inode is instantiated */
68#define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */
69
70/*
71 * A label access rule.
72 */
73struct smack_rule {
74 struct list_head list;
75 char *smk_subject;
76 char *smk_object;
77 int smk_access;
78};
79
80/*
81 * An entry in the table mapping smack values to
82 * CIPSO level/category-set values.
83 */
84struct smack_cipso {
85 int smk_level;
86 char smk_catset[SMK_LABELLEN];
87};
88
89/*
90 * An entry in the table identifying hosts.
91 */
92struct smk_netlbladdr {
93 struct list_head list;
94 struct sockaddr_in smk_host; /* network address */
95 struct in_addr smk_mask; /* network mask */
96 char *smk_label; /* label */
97};
98
99/*
100 * This is the repository for labels seen so that it is
101 * not necessary to keep allocating tiny chuncks of memory
102 * and so that they can be shared.
103 *
104 * Labels are never modified in place. Anytime a label
105 * is imported (e.g. xattrset on a file) the list is checked
106 * for it and it is added if it doesn't exist. The address
107 * is passed out in either case. Entries are added, but
108 * never deleted.
109 *
110 * Since labels are hanging around anyway it doesn't
111 * hurt to maintain a secid for those awkward situations
112 * where kernel components that ought to use LSM independent
113 * interfaces don't. The secid should go away when all of
114 * these components have been repaired.
115 *
116 * If there is a cipso value associated with the label it
117 * gets stored here, too. This will most likely be rare as
118 * the cipso direct mapping in used internally.
119 */
120struct smack_known {
121 struct list_head list;
122 char smk_known[SMK_LABELLEN];
123 u32 smk_secid;
124 struct smack_cipso *smk_cipso;
125 spinlock_t smk_cipsolock; /* for changing cipso map */
126};
127
128/*
129 * Mount options
130 */
131#define SMK_FSDEFAULT "smackfsdef="
132#define SMK_FSFLOOR "smackfsfloor="
133#define SMK_FSHAT "smackfshat="
134#define SMK_FSROOT "smackfsroot="
135
136#define SMACK_CIPSO_OPTION "-CIPSO"
137
138/*
139 * How communications on this socket are treated.
140 * Usually it's determined by the underlying netlabel code
141 * but there are certain cases, including single label hosts
142 * and potentially single label interfaces for which the
143 * treatment can not be known in advance.
144 *
145 * The possibility of additional labeling schemes being
146 * introduced in the future exists as well.
147 */
148#define SMACK_UNLABELED_SOCKET 0
149#define SMACK_CIPSO_SOCKET 1
150
151/*
152 * smackfs magic number
153 * smackfs macic number
154 */
155#define SMACK_MAGIC 0x43415d53 /* "SMAC" */
156
157/*
158 * CIPSO defaults.
159 */
160#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
161#define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */
162#define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */
163#define SMACK_CIPSO_MAXCATVAL 63 /* Bigger gets harder */
164#define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */
165#define SMACK_CIPSO_MAXCATNUM 239 /* CIPSO 2.2 standard */
166
167/*
168 * Flag for transmute access
169 */
170#define MAY_TRANSMUTE 64
171/*
172 * Just to make the common cases easier to deal with
173 */
174#define MAY_ANYREAD (MAY_READ | MAY_EXEC)
175#define MAY_READWRITE (MAY_READ | MAY_WRITE)
176#define MAY_NOT 0
177
178/*
179 * Number of access types used by Smack (rwxa)
180 */
181#define SMK_NUM_ACCESS_TYPE 4
182
183/*
184 * Smack audit data; is empty if CONFIG_AUDIT not set
185 * to save some stack
186 */
187struct smk_audit_info {
188#ifdef CONFIG_AUDIT
189 struct common_audit_data a;
190#endif
191};
192/*
193 * These functions are in smack_lsm.c
194 */
195struct inode_smack *new_inode_smack(char *);
196
197/*
198 * These functions are in smack_access.c
199 */
200int smk_access_entry(char *, char *, struct list_head *);
201int smk_access(char *, char *, int, struct smk_audit_info *);
202int smk_curacc(char *, u32, struct smk_audit_info *);
203int smack_to_cipso(const char *, struct smack_cipso *);
204void smack_from_cipso(u32, char *, char *);
205char *smack_from_secid(const u32);
206char *smk_import(const char *, int);
207struct smack_known *smk_import_entry(const char *, int);
208u32 smack_to_secid(const char *);
209
210/*
211 * Shared data.
212 */
213extern int smack_cipso_direct;
214extern char *smack_net_ambient;
215extern char *smack_onlycap;
216extern const char *smack_cipso_option;
217
218extern struct smack_known smack_known_floor;
219extern struct smack_known smack_known_hat;
220extern struct smack_known smack_known_huh;
221extern struct smack_known smack_known_invalid;
222extern struct smack_known smack_known_star;
223extern struct smack_known smack_known_web;
224
225extern struct list_head smack_known_list;
226extern struct list_head smack_rule_list;
227extern struct list_head smk_netlbladdr_list;
228
229extern struct security_operations smack_ops;
230
231/*
232 * Stricly for CIPSO level manipulation.
233 * Set the category bit number in a smack label sized buffer.
234 */
235static inline void smack_catset_bit(int cat, char *catsetp)
236{
237 if (cat > SMK_LABELLEN * 8)
238 return;
239
240 catsetp[(cat - 1) / 8] |= 0x80 >> ((cat - 1) % 8);
241}
242
243/*
244 * Is the directory transmuting?
245 */
246static inline int smk_inode_transmutable(const struct inode *isp)
247{
248 struct inode_smack *sip = isp->i_security;
249 return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
250}
251
252/*
253 * Present a pointer to the smack label in an inode blob.
254 */
255static inline char *smk_of_inode(const struct inode *isp)
256{
257 struct inode_smack *sip = isp->i_security;
258 return sip->smk_inode;
259}
260
261/*
262 * Present a pointer to the smack label in an task blob.
263 */
264static inline char *smk_of_task(const struct task_smack *tsp)
265{
266 return tsp->smk_task;
267}
268
269/*
270 * Present a pointer to the forked smack label in an task blob.
271 */
272static inline char *smk_of_forked(const struct task_smack *tsp)
273{
274 return tsp->smk_forked;
275}
276
277/*
278 * Present a pointer to the smack label in the current task blob.
279 */
280static inline char *smk_of_current(void)
281{
282 return smk_of_task(current_security());
283}
284
285/*
286 * logging functions
287 */
288#define SMACK_AUDIT_DENIED 0x1
289#define SMACK_AUDIT_ACCEPT 0x2
290extern int log_policy;
291
292void smack_log(char *subject_label, char *object_label,
293 int request,
294 int result, struct smk_audit_info *auditdata);
295
296#ifdef CONFIG_AUDIT
297
298/*
299 * some inline functions to set up audit data
300 * they do nothing if CONFIG_AUDIT is not set
301 *
302 */
303static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
304 char type)
305{
306 memset(a, 0, sizeof(*a));
307 a->a.type = type;
308 a->a.smack_audit_data.function = func;
309}
310
311static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
312 struct task_struct *t)
313{
314 a->a.u.tsk = t;
315}
316static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
317 struct dentry *d)
318{
319 a->a.u.dentry = d;
320}
321static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
322 struct inode *i)
323{
324 a->a.u.inode = i;
325}
326static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
327 struct path p)
328{
329 a->a.u.path = p;
330}
331static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
332 struct sock *sk)
333{
334 a->a.u.net.sk = sk;
335}
336
337#else /* no AUDIT */
338
339static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
340 char type)
341{
342}
343static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
344 struct task_struct *t)
345{
346}
347static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
348 struct dentry *d)
349{
350}
351static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
352 struct vfsmount *m)
353{
354}
355static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
356 struct inode *i)
357{
358}
359static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
360 struct path p)
361{
362}
363static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
364 struct sock *sk)
365{
366}
367#endif
368
369#endif /* _SECURITY_SMACK_H */
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>
18#include <linux/lsm_hooks.h>
19#include <linux/in.h>
20#if IS_ENABLED(CONFIG_IPV6)
21#include <linux/in6.h>
22#endif /* CONFIG_IPV6 */
23#include <net/netlabel.h>
24#include <linux/list.h>
25#include <linux/rculist.h>
26#include <linux/lsm_audit.h>
27
28/*
29 * Use IPv6 port labeling if IPv6 is enabled and secmarks
30 * are not being used.
31 */
32#if IS_ENABLED(CONFIG_IPV6) && !defined(CONFIG_SECURITY_SMACK_NETFILTER)
33#define SMACK_IPV6_PORT_LABELING 1
34#endif
35
36#if IS_ENABLED(CONFIG_IPV6) && defined(CONFIG_SECURITY_SMACK_NETFILTER)
37#define SMACK_IPV6_SECMARK_LABELING 1
38#endif
39
40/*
41 * Smack labels were limited to 23 characters for a long time.
42 */
43#define SMK_LABELLEN 24
44#define SMK_LONGLABEL 256
45
46/*
47 * This is the repository for labels seen so that it is
48 * not necessary to keep allocating tiny chuncks of memory
49 * and so that they can be shared.
50 *
51 * Labels are never modified in place. Anytime a label
52 * is imported (e.g. xattrset on a file) the list is checked
53 * for it and it is added if it doesn't exist. The address
54 * is passed out in either case. Entries are added, but
55 * never deleted.
56 *
57 * Since labels are hanging around anyway it doesn't
58 * hurt to maintain a secid for those awkward situations
59 * where kernel components that ought to use LSM independent
60 * interfaces don't. The secid should go away when all of
61 * these components have been repaired.
62 *
63 * The cipso value associated with the label gets stored here, too.
64 *
65 * Keep the access rules for this subject label here so that
66 * the entire set of rules does not need to be examined every
67 * time.
68 */
69struct smack_known {
70 struct list_head list;
71 struct hlist_node smk_hashed;
72 char *smk_known;
73 u32 smk_secid;
74 struct netlbl_lsm_secattr smk_netlabel; /* on wire labels */
75 struct list_head smk_rules; /* access rules */
76 struct mutex smk_rules_lock; /* lock for rules */
77};
78
79/*
80 * Maximum number of bytes for the levels in a CIPSO IP option.
81 * Why 23? CIPSO is constrained to 30, so a 32 byte buffer is
82 * bigger than can be used, and 24 is the next lower multiple
83 * of 8, and there are too many issues if there isn't space set
84 * aside for the terminating null byte.
85 */
86#define SMK_CIPSOLEN 24
87
88struct superblock_smack {
89 struct smack_known *smk_root;
90 struct smack_known *smk_floor;
91 struct smack_known *smk_hat;
92 struct smack_known *smk_default;
93 int smk_flags;
94};
95
96/*
97 * Superblock flags
98 */
99#define SMK_SB_INITIALIZED 0x01
100#define SMK_SB_UNTRUSTED 0x02
101
102struct socket_smack {
103 struct smack_known *smk_out; /* outbound label */
104 struct smack_known *smk_in; /* inbound label */
105 struct smack_known *smk_packet; /* TCP peer label */
106};
107
108/*
109 * Inode smack data
110 */
111struct inode_smack {
112 struct smack_known *smk_inode; /* label of the fso */
113 struct smack_known *smk_task; /* label of the task */
114 struct smack_known *smk_mmap; /* label of the mmap domain */
115 struct mutex smk_lock; /* initialization lock */
116 int smk_flags; /* smack inode flags */
117 struct rcu_head smk_rcu; /* for freeing inode_smack */
118};
119
120struct task_smack {
121 struct smack_known *smk_task; /* label for access control */
122 struct smack_known *smk_forked; /* label when forked */
123 struct list_head smk_rules; /* per task access rules */
124 struct mutex smk_rules_lock; /* lock for the rules */
125 struct list_head smk_relabel; /* transit allowed labels */
126};
127
128#define SMK_INODE_INSTANT 0x01 /* inode is instantiated */
129#define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */
130#define SMK_INODE_CHANGED 0x04 /* smack was transmuted */
131#define SMK_INODE_IMPURE 0x08 /* involved in an impure transaction */
132
133/*
134 * A label access rule.
135 */
136struct smack_rule {
137 struct list_head list;
138 struct smack_known *smk_subject;
139 struct smack_known *smk_object;
140 int smk_access;
141};
142
143/*
144 * An entry in the table identifying IPv4 hosts.
145 */
146struct smk_net4addr {
147 struct list_head list;
148 struct in_addr smk_host; /* network address */
149 struct in_addr smk_mask; /* network mask */
150 int smk_masks; /* mask size */
151 struct smack_known *smk_label; /* label */
152};
153
154#if IS_ENABLED(CONFIG_IPV6)
155/*
156 * An entry in the table identifying IPv6 hosts.
157 */
158struct smk_net6addr {
159 struct list_head list;
160 struct in6_addr smk_host; /* network address */
161 struct in6_addr smk_mask; /* network mask */
162 int smk_masks; /* mask size */
163 struct smack_known *smk_label; /* label */
164};
165#endif /* CONFIG_IPV6 */
166
167#ifdef SMACK_IPV6_PORT_LABELING
168/*
169 * An entry in the table identifying ports.
170 */
171struct smk_port_label {
172 struct list_head list;
173 struct sock *smk_sock; /* socket initialized on */
174 unsigned short smk_port; /* the port number */
175 struct smack_known *smk_in; /* inbound label */
176 struct smack_known *smk_out; /* outgoing label */
177 short smk_sock_type; /* Socket type */
178 short smk_can_reuse;
179};
180#endif /* SMACK_IPV6_PORT_LABELING */
181
182struct smack_known_list_elem {
183 struct list_head list;
184 struct smack_known *smk_label;
185};
186
187/* Super block security struct flags for mount options */
188#define FSDEFAULT_MNT 0x01
189#define FSFLOOR_MNT 0x02
190#define FSHAT_MNT 0x04
191#define FSROOT_MNT 0x08
192#define FSTRANS_MNT 0x10
193
194#define NUM_SMK_MNT_OPTS 5
195
196enum {
197 Opt_error = -1,
198 Opt_fsdefault = 1,
199 Opt_fsfloor = 2,
200 Opt_fshat = 3,
201 Opt_fsroot = 4,
202 Opt_fstransmute = 5,
203};
204
205/*
206 * Mount options
207 */
208#define SMK_FSDEFAULT "smackfsdef="
209#define SMK_FSFLOOR "smackfsfloor="
210#define SMK_FSHAT "smackfshat="
211#define SMK_FSROOT "smackfsroot="
212#define SMK_FSTRANS "smackfstransmute="
213
214#define SMACK_DELETE_OPTION "-DELETE"
215#define SMACK_CIPSO_OPTION "-CIPSO"
216
217/*
218 * How communications on this socket are treated.
219 * Usually it's determined by the underlying netlabel code
220 * but there are certain cases, including single label hosts
221 * and potentially single label interfaces for which the
222 * treatment can not be known in advance.
223 *
224 * The possibility of additional labeling schemes being
225 * introduced in the future exists as well.
226 */
227#define SMACK_UNLABELED_SOCKET 0
228#define SMACK_CIPSO_SOCKET 1
229
230/*
231 * CIPSO defaults.
232 */
233#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
234#define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */
235#define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */
236#define SMACK_CIPSO_MAPPED_DEFAULT 251 /* Also arbitrary */
237#define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */
238/*
239 * CIPSO 2.2 standard is 239, but Smack wants to use the
240 * categories in a structured way that limits the value to
241 * the bits in 23 bytes, hence the unusual number.
242 */
243#define SMACK_CIPSO_MAXCATNUM 184 /* 23 * 8 */
244
245/*
246 * Ptrace rules
247 */
248#define SMACK_PTRACE_DEFAULT 0
249#define SMACK_PTRACE_EXACT 1
250#define SMACK_PTRACE_DRACONIAN 2
251#define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN
252
253/*
254 * Flags for untraditional access modes.
255 * It shouldn't be necessary to avoid conflicts with definitions
256 * in fs.h, but do so anyway.
257 */
258#define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */
259#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
260#define MAY_BRINGUP 0x00004000 /* Report use of this rule */
261
262/*
263 * The policy for delivering signals is configurable.
264 * It is usually "write", but can be "append".
265 */
266#ifdef CONFIG_SECURITY_SMACK_APPEND_SIGNALS
267#define MAY_DELIVER MAY_APPEND /* Signal delivery requires append */
268#else
269#define MAY_DELIVER MAY_WRITE /* Signal delivery requires write */
270#endif
271
272#define SMACK_BRINGUP_ALLOW 1 /* Allow bringup mode */
273#define SMACK_UNCONFINED_SUBJECT 2 /* Allow unconfined label */
274#define SMACK_UNCONFINED_OBJECT 3 /* Allow unconfined label */
275
276/*
277 * Just to make the common cases easier to deal with
278 */
279#define MAY_ANYREAD (MAY_READ | MAY_EXEC)
280#define MAY_READWRITE (MAY_READ | MAY_WRITE)
281#define MAY_NOT 0
282
283/*
284 * Number of access types used by Smack (rwxatlb)
285 */
286#define SMK_NUM_ACCESS_TYPE 7
287
288/* SMACK data */
289struct smack_audit_data {
290 const char *function;
291 char *subject;
292 char *object;
293 char *request;
294 int result;
295};
296
297/*
298 * Smack audit data; is empty if CONFIG_AUDIT not set
299 * to save some stack
300 */
301struct smk_audit_info {
302#ifdef CONFIG_AUDIT
303 struct common_audit_data a;
304 struct smack_audit_data sad;
305#endif
306};
307
308/*
309 * These functions are in smack_access.c
310 */
311int smk_access_entry(char *, char *, struct list_head *);
312int smk_access(struct smack_known *, struct smack_known *,
313 int, struct smk_audit_info *);
314int smk_tskacc(struct task_smack *, struct smack_known *,
315 u32, struct smk_audit_info *);
316int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
317struct smack_known *smack_from_secid(const u32);
318char *smk_parse_smack(const char *string, int len);
319int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
320struct smack_known *smk_import_entry(const char *, int);
321void smk_insert_entry(struct smack_known *skp);
322struct smack_known *smk_find_entry(const char *);
323bool smack_privileged(int cap);
324bool smack_privileged_cred(int cap, const struct cred *cred);
325void smk_destroy_label_list(struct list_head *list);
326
327/*
328 * Shared data.
329 */
330extern int smack_enabled;
331extern int smack_cipso_direct;
332extern int smack_cipso_mapped;
333extern struct smack_known *smack_net_ambient;
334extern struct smack_known *smack_syslog_label;
335#ifdef CONFIG_SECURITY_SMACK_BRINGUP
336extern struct smack_known *smack_unconfined;
337#endif
338extern int smack_ptrace_rule;
339
340extern struct smack_known smack_known_floor;
341extern struct smack_known smack_known_hat;
342extern struct smack_known smack_known_huh;
343extern struct smack_known smack_known_star;
344extern struct smack_known smack_known_web;
345
346extern struct mutex smack_known_lock;
347extern struct list_head smack_known_list;
348extern struct list_head smk_net4addr_list;
349#if IS_ENABLED(CONFIG_IPV6)
350extern struct list_head smk_net6addr_list;
351#endif /* CONFIG_IPV6 */
352
353extern struct mutex smack_onlycap_lock;
354extern struct list_head smack_onlycap_list;
355
356#define SMACK_HASH_SLOTS 16
357extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
358
359/*
360 * Is the directory transmuting?
361 */
362static inline int smk_inode_transmutable(const struct inode *isp)
363{
364 struct inode_smack *sip = isp->i_security;
365 return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
366}
367
368/*
369 * Present a pointer to the smack label entry in an inode blob.
370 */
371static inline struct smack_known *smk_of_inode(const struct inode *isp)
372{
373 struct inode_smack *sip = isp->i_security;
374 return sip->smk_inode;
375}
376
377/*
378 * Present a pointer to the smack label entry in an task blob.
379 */
380static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
381{
382 return tsp->smk_task;
383}
384
385static inline struct smack_known *smk_of_task_struct(const struct task_struct *t)
386{
387 struct smack_known *skp;
388
389 rcu_read_lock();
390 skp = smk_of_task(__task_cred(t)->security);
391 rcu_read_unlock();
392 return skp;
393}
394
395/*
396 * Present a pointer to the forked smack label entry in an task blob.
397 */
398static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
399{
400 return tsp->smk_forked;
401}
402
403/*
404 * Present a pointer to the smack label in the current task blob.
405 */
406static inline struct smack_known *smk_of_current(void)
407{
408 return smk_of_task(current_security());
409}
410
411/*
412 * logging functions
413 */
414#define SMACK_AUDIT_DENIED 0x1
415#define SMACK_AUDIT_ACCEPT 0x2
416extern int log_policy;
417
418void smack_log(char *subject_label, char *object_label,
419 int request,
420 int result, struct smk_audit_info *auditdata);
421
422#ifdef CONFIG_AUDIT
423
424/*
425 * some inline functions to set up audit data
426 * they do nothing if CONFIG_AUDIT is not set
427 *
428 */
429static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
430 char type)
431{
432 memset(&a->sad, 0, sizeof(a->sad));
433 a->a.type = type;
434 a->a.smack_audit_data = &a->sad;
435 a->a.smack_audit_data->function = func;
436}
437
438static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func,
439 char type, struct lsm_network_audit *net)
440{
441 smk_ad_init(a, func, type);
442 memset(net, 0, sizeof(*net));
443 a->a.u.net = net;
444}
445
446static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
447 struct task_struct *t)
448{
449 a->a.u.tsk = t;
450}
451static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
452 struct dentry *d)
453{
454 a->a.u.dentry = d;
455}
456static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
457 struct inode *i)
458{
459 a->a.u.inode = i;
460}
461static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
462 struct path p)
463{
464 a->a.u.path = p;
465}
466static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
467 struct sock *sk)
468{
469 a->a.u.net->sk = sk;
470}
471
472#else /* no AUDIT */
473
474static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
475 char type)
476{
477}
478static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
479 struct task_struct *t)
480{
481}
482static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
483 struct dentry *d)
484{
485}
486static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
487 struct vfsmount *m)
488{
489}
490static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
491 struct inode *i)
492{
493}
494static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
495 struct path p)
496{
497}
498static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
499 struct sock *sk)
500{
501}
502#endif
503
504#endif /* _SECURITY_SMACK_H */