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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 * Smack labels were limited to 23 characters for a long time.
27 */
28#define SMK_LABELLEN 24
29#define SMK_LONGLABEL 256
30
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 */
54struct smack_known {
55 struct list_head list;
56 struct hlist_node smk_hashed;
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
64/*
65 * Maximum number of bytes for the levels in a CIPSO IP option.
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 */
71#define SMK_CIPSOLEN 24
72
73struct superblock_smack {
74 char *smk_root;
75 char *smk_floor;
76 char *smk_hat;
77 char *smk_default;
78 int smk_initialized;
79};
80
81struct socket_smack {
82 struct smack_known *smk_out; /* outbound label */
83 char *smk_in; /* inbound label */
84 char *smk_packet; /* TCP peer label */
85};
86
87/*
88 * Inode smack data
89 */
90struct inode_smack {
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 */
96};
97
98struct task_smack {
99 struct smack_known *smk_task; /* label for access control */
100 struct smack_known *smk_forked; /* label when forked */
101 struct list_head smk_rules; /* per task access rules */
102 struct mutex smk_rules_lock; /* lock for the rules */
103};
104
105#define SMK_INODE_INSTANT 0x01 /* inode is instantiated */
106#define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */
107#define SMK_INODE_CHANGED 0x04 /* smack was transmuted */
108
109/*
110 * A label access rule.
111 */
112struct smack_rule {
113 struct list_head list;
114 struct smack_known *smk_subject;
115 char *smk_object;
116 int smk_access;
117};
118
119/*
120 * An entry in the table identifying hosts.
121 */
122struct smk_netlbladdr {
123 struct list_head list;
124 struct sockaddr_in smk_host; /* network address */
125 struct in_addr smk_mask; /* network mask */
126 char *smk_label; /* label */
127};
128
129/*
130 * An entry in the table identifying ports.
131 */
132struct 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 */
137 struct smack_known *smk_out; /* outgoing label */
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="
147#define SMK_FSTRANS "smackfstransmute="
148
149#define SMACK_CIPSO_OPTION "-CIPSO"
150
151/*
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
164/*
165 * CIPSO defaults.
166 */
167#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
168#define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */
169#define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */
170#define SMACK_CIPSO_MAPPED_DEFAULT 251 /* Also arbitrary */
171#define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */
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 */
178
179/*
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.
183 */
184#define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */
185#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
186
187/*
188 * Just to make the common cases easier to deal with
189 */
190#define MAY_ANYREAD (MAY_READ | MAY_EXEC)
191#define MAY_READWRITE (MAY_READ | MAY_WRITE)
192#define MAY_NOT 0
193
194/*
195 * Number of access types used by Smack (rwxatl)
196 */
197#define SMK_NUM_ACCESS_TYPE 6
198
199/* SMACK data */
200struct smack_audit_data {
201 const char *function;
202 char *subject;
203 char *object;
204 char *request;
205 int result;
206};
207
208/*
209 * Smack audit data; is empty if CONFIG_AUDIT not set
210 * to save some stack
211 */
212struct smk_audit_info {
213#ifdef CONFIG_AUDIT
214 struct common_audit_data a;
215 struct smack_audit_data sad;
216#endif
217};
218/*
219 * These functions are in smack_lsm.c
220 */
221struct inode_smack *new_inode_smack(char *);
222
223/*
224 * These functions are in smack_access.c
225 */
226int smk_access_entry(char *, char *, struct list_head *);
227int smk_access(struct smack_known *, char *, int, struct smk_audit_info *);
228int smk_curacc(char *, u32, struct smk_audit_info *);
229struct smack_known *smack_from_secid(const u32);
230char *smk_parse_smack(const char *string, int len);
231int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
232char *smk_import(const char *, int);
233struct smack_known *smk_import_entry(const char *, int);
234void smk_insert_entry(struct smack_known *skp);
235struct smack_known *smk_find_entry(const char *);
236u32 smack_to_secid(const char *);
237
238/*
239 * Shared data.
240 */
241extern int smack_cipso_direct;
242extern int smack_cipso_mapped;
243extern struct smack_known *smack_net_ambient;
244extern struct smack_known *smack_onlycap;
245extern struct smack_known *smack_syslog_label;
246extern const char *smack_cipso_option;
247
248extern struct smack_known smack_known_floor;
249extern struct smack_known smack_known_hat;
250extern struct smack_known smack_known_huh;
251extern struct smack_known smack_known_invalid;
252extern struct smack_known smack_known_star;
253extern struct smack_known smack_known_web;
254
255extern struct mutex smack_known_lock;
256extern struct list_head smack_known_list;
257extern struct list_head smk_netlbladdr_list;
258
259extern struct security_operations smack_ops;
260
261#define SMACK_HASH_SLOTS 16
262extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
263
264/*
265 * Is the directory transmuting?
266 */
267static 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
273/*
274 * Present a pointer to the smack label in an inode blob.
275 */
276static 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
282/*
283 * Present a pointer to the smack label entry in an task blob.
284 */
285static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
286{
287 return tsp->smk_task;
288}
289
290/*
291 * Present a pointer to the forked smack label entry in an task blob.
292 */
293static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
294{
295 return tsp->smk_forked;
296}
297
298/*
299 * Present a pointer to the smack label in the current task blob.
300 */
301static inline struct smack_known *smk_of_current(void)
302{
303 return smk_of_task(current_security());
304}
305
306/*
307 * Is the task privileged and allowed to be privileged
308 * by the onlycap rule.
309 */
310static inline int smack_privileged(int cap)
311{
312 struct smack_known *skp = smk_of_current();
313
314 if (!capable(cap))
315 return 0;
316 if (smack_onlycap == NULL || smack_onlycap == skp)
317 return 1;
318 return 0;
319}
320
321/*
322 * logging functions
323 */
324#define SMACK_AUDIT_DENIED 0x1
325#define SMACK_AUDIT_ACCEPT 0x2
326extern int log_policy;
327
328void 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 */
339static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
340 char type)
341{
342 memset(&a->sad, 0, sizeof(a->sad));
343 a->a.type = type;
344 a->a.smack_audit_data = &a->sad;
345 a->a.smack_audit_data->function = func;
346}
347
348static 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
356static 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}
361static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
362 struct dentry *d)
363{
364 a->a.u.dentry = d;
365}
366static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
367 struct inode *i)
368{
369 a->a.u.inode = i;
370}
371static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
372 struct path p)
373{
374 a->a.u.path = p;
375}
376static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
377 struct sock *sk)
378{
379 a->a.u.net->sk = sk;
380}
381
382#else /* no AUDIT */
383
384static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
385 char type)
386{
387}
388static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
389 struct task_struct *t)
390{
391}
392static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
393 struct dentry *d)
394{
395}
396static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
397 struct vfsmount *m)
398{
399}
400static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
401 struct inode *i)
402{
403}
404static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
405 struct path p)
406{
407}
408static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
409 struct sock *sk)
410{
411}
412#endif
413
414#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_initialized;
94};
95
96struct socket_smack {
97 struct smack_known *smk_out; /* outbound label */
98 struct smack_known *smk_in; /* inbound label */
99 struct smack_known *smk_packet; /* TCP peer label */
100};
101
102/*
103 * Inode smack data
104 */
105struct inode_smack {
106 struct smack_known *smk_inode; /* label of the fso */
107 struct smack_known *smk_task; /* label of the task */
108 struct smack_known *smk_mmap; /* label of the mmap domain */
109 struct mutex smk_lock; /* initialization lock */
110 int smk_flags; /* smack inode flags */
111};
112
113struct task_smack {
114 struct smack_known *smk_task; /* label for access control */
115 struct smack_known *smk_forked; /* label when forked */
116 struct list_head smk_rules; /* per task access rules */
117 struct mutex smk_rules_lock; /* lock for the rules */
118 struct list_head smk_relabel; /* transit allowed labels */
119};
120
121#define SMK_INODE_INSTANT 0x01 /* inode is instantiated */
122#define SMK_INODE_TRANSMUTE 0x02 /* directory is transmuting */
123#define SMK_INODE_CHANGED 0x04 /* smack was transmuted */
124#define SMK_INODE_IMPURE 0x08 /* involved in an impure transaction */
125
126/*
127 * A label access rule.
128 */
129struct smack_rule {
130 struct list_head list;
131 struct smack_known *smk_subject;
132 struct smack_known *smk_object;
133 int smk_access;
134};
135
136/*
137 * An entry in the table identifying IPv4 hosts.
138 */
139struct smk_net4addr {
140 struct list_head list;
141 struct in_addr smk_host; /* network address */
142 struct in_addr smk_mask; /* network mask */
143 int smk_masks; /* mask size */
144 struct smack_known *smk_label; /* label */
145};
146
147#if IS_ENABLED(CONFIG_IPV6)
148/*
149 * An entry in the table identifying IPv6 hosts.
150 */
151struct smk_net6addr {
152 struct list_head list;
153 struct in6_addr smk_host; /* network address */
154 struct in6_addr smk_mask; /* network mask */
155 int smk_masks; /* mask size */
156 struct smack_known *smk_label; /* label */
157};
158#endif /* CONFIG_IPV6 */
159
160#ifdef SMACK_IPV6_PORT_LABELING
161/*
162 * An entry in the table identifying ports.
163 */
164struct smk_port_label {
165 struct list_head list;
166 struct sock *smk_sock; /* socket initialized on */
167 unsigned short smk_port; /* the port number */
168 struct smack_known *smk_in; /* inbound label */
169 struct smack_known *smk_out; /* outgoing label */
170};
171#endif /* SMACK_IPV6_PORT_LABELING */
172
173struct smack_known_list_elem {
174 struct list_head list;
175 struct smack_known *smk_label;
176};
177
178/* Super block security struct flags for mount options */
179#define FSDEFAULT_MNT 0x01
180#define FSFLOOR_MNT 0x02
181#define FSHAT_MNT 0x04
182#define FSROOT_MNT 0x08
183#define FSTRANS_MNT 0x10
184
185#define NUM_SMK_MNT_OPTS 5
186
187enum {
188 Opt_error = -1,
189 Opt_fsdefault = 1,
190 Opt_fsfloor = 2,
191 Opt_fshat = 3,
192 Opt_fsroot = 4,
193 Opt_fstransmute = 5,
194};
195
196/*
197 * Mount options
198 */
199#define SMK_FSDEFAULT "smackfsdef="
200#define SMK_FSFLOOR "smackfsfloor="
201#define SMK_FSHAT "smackfshat="
202#define SMK_FSROOT "smackfsroot="
203#define SMK_FSTRANS "smackfstransmute="
204
205#define SMACK_DELETE_OPTION "-DELETE"
206#define SMACK_CIPSO_OPTION "-CIPSO"
207
208/*
209 * How communications on this socket are treated.
210 * Usually it's determined by the underlying netlabel code
211 * but there are certain cases, including single label hosts
212 * and potentially single label interfaces for which the
213 * treatment can not be known in advance.
214 *
215 * The possibility of additional labeling schemes being
216 * introduced in the future exists as well.
217 */
218#define SMACK_UNLABELED_SOCKET 0
219#define SMACK_CIPSO_SOCKET 1
220
221/*
222 * CIPSO defaults.
223 */
224#define SMACK_CIPSO_DOI_DEFAULT 3 /* Historical */
225#define SMACK_CIPSO_DOI_INVALID -1 /* Not a DOI */
226#define SMACK_CIPSO_DIRECT_DEFAULT 250 /* Arbitrary */
227#define SMACK_CIPSO_MAPPED_DEFAULT 251 /* Also arbitrary */
228#define SMACK_CIPSO_MAXLEVEL 255 /* CIPSO 2.2 standard */
229/*
230 * CIPSO 2.2 standard is 239, but Smack wants to use the
231 * categories in a structured way that limits the value to
232 * the bits in 23 bytes, hence the unusual number.
233 */
234#define SMACK_CIPSO_MAXCATNUM 184 /* 23 * 8 */
235
236/*
237 * Ptrace rules
238 */
239#define SMACK_PTRACE_DEFAULT 0
240#define SMACK_PTRACE_EXACT 1
241#define SMACK_PTRACE_DRACONIAN 2
242#define SMACK_PTRACE_MAX SMACK_PTRACE_DRACONIAN
243
244/*
245 * Flags for untraditional access modes.
246 * It shouldn't be necessary to avoid conflicts with definitions
247 * in fs.h, but do so anyway.
248 */
249#define MAY_TRANSMUTE 0x00001000 /* Controls directory labeling */
250#define MAY_LOCK 0x00002000 /* Locks should be writes, but ... */
251#define MAY_BRINGUP 0x00004000 /* Report use of this rule */
252
253#define SMACK_BRINGUP_ALLOW 1 /* Allow bringup mode */
254#define SMACK_UNCONFINED_SUBJECT 2 /* Allow unconfined label */
255#define SMACK_UNCONFINED_OBJECT 3 /* Allow unconfined label */
256
257/*
258 * Just to make the common cases easier to deal with
259 */
260#define MAY_ANYREAD (MAY_READ | MAY_EXEC)
261#define MAY_READWRITE (MAY_READ | MAY_WRITE)
262#define MAY_NOT 0
263
264/*
265 * Number of access types used by Smack (rwxatlb)
266 */
267#define SMK_NUM_ACCESS_TYPE 7
268
269/* SMACK data */
270struct smack_audit_data {
271 const char *function;
272 char *subject;
273 char *object;
274 char *request;
275 int result;
276};
277
278/*
279 * Smack audit data; is empty if CONFIG_AUDIT not set
280 * to save some stack
281 */
282struct smk_audit_info {
283#ifdef CONFIG_AUDIT
284 struct common_audit_data a;
285 struct smack_audit_data sad;
286#endif
287};
288
289/*
290 * These functions are in smack_access.c
291 */
292int smk_access_entry(char *, char *, struct list_head *);
293int smk_access(struct smack_known *, struct smack_known *,
294 int, struct smk_audit_info *);
295int smk_tskacc(struct task_smack *, struct smack_known *,
296 u32, struct smk_audit_info *);
297int smk_curacc(struct smack_known *, u32, struct smk_audit_info *);
298struct smack_known *smack_from_secid(const u32);
299char *smk_parse_smack(const char *string, int len);
300int smk_netlbl_mls(int, char *, struct netlbl_lsm_secattr *, int);
301struct smack_known *smk_import_entry(const char *, int);
302void smk_insert_entry(struct smack_known *skp);
303struct smack_known *smk_find_entry(const char *);
304int smack_privileged(int cap);
305void smk_destroy_label_list(struct list_head *list);
306
307/*
308 * Shared data.
309 */
310extern int smack_enabled;
311extern int smack_cipso_direct;
312extern int smack_cipso_mapped;
313extern struct smack_known *smack_net_ambient;
314extern struct smack_known *smack_syslog_label;
315#ifdef CONFIG_SECURITY_SMACK_BRINGUP
316extern struct smack_known *smack_unconfined;
317#endif
318extern int smack_ptrace_rule;
319
320extern struct smack_known smack_known_floor;
321extern struct smack_known smack_known_hat;
322extern struct smack_known smack_known_huh;
323extern struct smack_known smack_known_invalid;
324extern struct smack_known smack_known_star;
325extern struct smack_known smack_known_web;
326
327extern struct mutex smack_known_lock;
328extern struct list_head smack_known_list;
329extern struct list_head smk_net4addr_list;
330#if IS_ENABLED(CONFIG_IPV6)
331extern struct list_head smk_net6addr_list;
332#endif /* CONFIG_IPV6 */
333
334extern struct mutex smack_onlycap_lock;
335extern struct list_head smack_onlycap_list;
336
337#define SMACK_HASH_SLOTS 16
338extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
339
340/*
341 * Is the directory transmuting?
342 */
343static inline int smk_inode_transmutable(const struct inode *isp)
344{
345 struct inode_smack *sip = isp->i_security;
346 return (sip->smk_flags & SMK_INODE_TRANSMUTE) != 0;
347}
348
349/*
350 * Present a pointer to the smack label entry in an inode blob.
351 */
352static inline struct smack_known *smk_of_inode(const struct inode *isp)
353{
354 struct inode_smack *sip = isp->i_security;
355 return sip->smk_inode;
356}
357
358/*
359 * Present a pointer to the smack label entry in an task blob.
360 */
361static inline struct smack_known *smk_of_task(const struct task_smack *tsp)
362{
363 return tsp->smk_task;
364}
365
366static inline struct smack_known *smk_of_task_struct(const struct task_struct *t)
367{
368 struct smack_known *skp;
369
370 rcu_read_lock();
371 skp = smk_of_task(__task_cred(t)->security);
372 rcu_read_unlock();
373 return skp;
374}
375
376/*
377 * Present a pointer to the forked smack label entry in an task blob.
378 */
379static inline struct smack_known *smk_of_forked(const struct task_smack *tsp)
380{
381 return tsp->smk_forked;
382}
383
384/*
385 * Present a pointer to the smack label in the current task blob.
386 */
387static inline struct smack_known *smk_of_current(void)
388{
389 return smk_of_task(current_security());
390}
391
392/*
393 * logging functions
394 */
395#define SMACK_AUDIT_DENIED 0x1
396#define SMACK_AUDIT_ACCEPT 0x2
397extern int log_policy;
398
399void smack_log(char *subject_label, char *object_label,
400 int request,
401 int result, struct smk_audit_info *auditdata);
402
403#ifdef CONFIG_AUDIT
404
405/*
406 * some inline functions to set up audit data
407 * they do nothing if CONFIG_AUDIT is not set
408 *
409 */
410static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
411 char type)
412{
413 memset(&a->sad, 0, sizeof(a->sad));
414 a->a.type = type;
415 a->a.smack_audit_data = &a->sad;
416 a->a.smack_audit_data->function = func;
417}
418
419static inline void smk_ad_init_net(struct smk_audit_info *a, const char *func,
420 char type, struct lsm_network_audit *net)
421{
422 smk_ad_init(a, func, type);
423 memset(net, 0, sizeof(*net));
424 a->a.u.net = net;
425}
426
427static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
428 struct task_struct *t)
429{
430 a->a.u.tsk = t;
431}
432static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
433 struct dentry *d)
434{
435 a->a.u.dentry = d;
436}
437static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
438 struct inode *i)
439{
440 a->a.u.inode = i;
441}
442static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
443 struct path p)
444{
445 a->a.u.path = p;
446}
447static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
448 struct sock *sk)
449{
450 a->a.u.net->sk = sk;
451}
452
453#else /* no AUDIT */
454
455static inline void smk_ad_init(struct smk_audit_info *a, const char *func,
456 char type)
457{
458}
459static inline void smk_ad_setfield_u_tsk(struct smk_audit_info *a,
460 struct task_struct *t)
461{
462}
463static inline void smk_ad_setfield_u_fs_path_dentry(struct smk_audit_info *a,
464 struct dentry *d)
465{
466}
467static inline void smk_ad_setfield_u_fs_path_mnt(struct smk_audit_info *a,
468 struct vfsmount *m)
469{
470}
471static inline void smk_ad_setfield_u_fs_inode(struct smk_audit_info *a,
472 struct inode *i)
473{
474}
475static inline void smk_ad_setfield_u_fs_path(struct smk_audit_info *a,
476 struct path p)
477{
478}
479static inline void smk_ad_setfield_u_net_sk(struct smk_audit_info *a,
480 struct sock *sk)
481{
482}
483#endif
484
485#endif /* _SECURITY_SMACK_H */