1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2005,2006,2007,2008 IBM Corporation
4 *
5 * Authors:
6 * Reiner Sailer <sailer@watson.ibm.com>
7 * Mimi Zohar <zohar@us.ibm.com>
8 *
9 * File: ima.h
10 * internal Integrity Measurement Architecture (IMA) definitions
11 */
12
13 #ifndef __LINUX_IMA_H
14 #define __LINUX_IMA_H
15
16 #include <linux/types.h>
17 #include <linux/crypto.h>
18 #include <linux/fs.h>
19 #include <linux/security.h>
20 #include <linux/hash.h>
21 #include <linux/tpm.h>
22 #include <linux/audit.h>
23 #include <crypto/hash_info.h>
24
25 #include "../integrity.h"
26
27 enum ima_show_type { IMA_SHOW_BINARY, IMA_SHOW_BINARY_NO_FIELD_LEN,
28 IMA_SHOW_BINARY_OLD_STRING_FMT, IMA_SHOW_ASCII };
29 enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8, TPM_PCR10 = 10 };
30
31 /* digest size for IMA, fits SHA1 or MD5 */
32 #define IMA_DIGEST_SIZE SHA1_DIGEST_SIZE
33 #define IMA_EVENT_NAME_LEN_MAX 255
34
35 #define IMA_HASH_BITS 10
36 #define IMA_MEASURE_HTABLE_SIZE (1 << IMA_HASH_BITS)
37
38 #define IMA_TEMPLATE_FIELD_ID_MAX_LEN 16
39 #define IMA_TEMPLATE_NUM_FIELDS_MAX 15
40
41 #define IMA_TEMPLATE_IMA_NAME "ima"
42 #define IMA_TEMPLATE_IMA_FMT "d|n"
43
44 #define NR_BANKS(chip) ((chip != NULL) ? chip->nr_allocated_banks : 0)
45
46 /* current content of the policy */
47 extern int ima_policy_flag;
48
49 /* bitset of digests algorithms allowed in the setxattr hook */
50 extern atomic_t ima_setxattr_allowed_hash_algorithms;
51
52 /* IMA hash algorithm description */
53 struct ima_algo_desc {
54 struct crypto_shash *tfm;
55 enum hash_algo algo;
56 };
57
58 /* set during initialization */
59 extern int ima_hash_algo __ro_after_init;
60 extern int ima_sha1_idx __ro_after_init;
61 extern int ima_hash_algo_idx __ro_after_init;
62 extern int ima_extra_slots __ro_after_init;
63 extern struct ima_algo_desc *ima_algo_array __ro_after_init;
64
65 extern int ima_appraise;
66 extern struct tpm_chip *ima_tpm_chip;
67 extern const char boot_aggregate_name[];
68
69 /* IMA event related data */
70 struct ima_event_data {
71 struct ima_iint_cache *iint;
72 struct file *file;
73 const unsigned char *filename;
74 struct evm_ima_xattr_data *xattr_value;
75 int xattr_len;
76 const struct modsig *modsig;
77 const char *violation;
78 const void *buf;
79 int buf_len;
80 };
81
82 /* IMA template field data definition */
83 struct ima_field_data {
84 u8 *data;
85 u32 len;
86 };
87
88 /* IMA template field definition */
89 struct ima_template_field {
90 const char field_id[IMA_TEMPLATE_FIELD_ID_MAX_LEN];
91 int (*field_init)(struct ima_event_data *event_data,
92 struct ima_field_data *field_data);
93 void (*field_show)(struct seq_file *m, enum ima_show_type show,
94 struct ima_field_data *field_data);
95 };
96
97 /* IMA template descriptor definition */
98 struct ima_template_desc {
99 struct list_head list;
100 char *name;
101 char *fmt;
102 int num_fields;
103 const struct ima_template_field **fields;
104 };
105
106 struct ima_template_entry {
107 int pcr;
108 struct tpm_digest *digests;
109 struct ima_template_desc *template_desc; /* template descriptor */
110 u32 template_data_len;
111 struct ima_field_data template_data[]; /* template related data */
112 };
113
114 struct ima_queue_entry {
115 struct hlist_node hnext; /* place in hash collision list */
116 struct list_head later; /* place in ima_measurements list */
117 struct ima_template_entry *entry;
118 };
119 extern struct list_head ima_measurements; /* list of all measurements */
120
121 /* Some details preceding the binary serialized measurement list */
122 struct ima_kexec_hdr {
123 u16 version;
124 u16 _reserved0;
125 u32 _reserved1;
126 u64 buffer_size;
127 u64 count;
128 };
129
130 /* IMA iint action cache flags */
131 #define IMA_MEASURE 0x00000001
132 #define IMA_MEASURED 0x00000002
133 #define IMA_APPRAISE 0x00000004
134 #define IMA_APPRAISED 0x00000008
135 /*#define IMA_COLLECT 0x00000010 do not use this flag */
136 #define IMA_COLLECTED 0x00000020
137 #define IMA_AUDIT 0x00000040
138 #define IMA_AUDITED 0x00000080
139 #define IMA_HASH 0x00000100
140 #define IMA_HASHED 0x00000200
141
142 /* IMA iint policy rule cache flags */
143 #define IMA_NONACTION_FLAGS 0xff000000
144 #define IMA_DIGSIG_REQUIRED 0x01000000
145 #define IMA_PERMIT_DIRECTIO 0x02000000
146 #define IMA_NEW_FILE 0x04000000
147 #define IMA_FAIL_UNVERIFIABLE_SIGS 0x10000000
148 #define IMA_MODSIG_ALLOWED 0x20000000
149 #define IMA_CHECK_BLACKLIST 0x40000000
150 #define IMA_VERITY_REQUIRED 0x80000000
151
152 /* Exclude non-action flags which are not rule-specific. */
153 #define IMA_NONACTION_RULE_FLAGS (IMA_NONACTION_FLAGS & ~IMA_NEW_FILE)
154
155 #define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT | \
156 IMA_HASH | IMA_APPRAISE_SUBMASK)
157 #define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED | \
158 IMA_HASHED | IMA_COLLECTED | \
159 IMA_APPRAISED_SUBMASK)
160
161 /* IMA iint subaction appraise cache flags */
162 #define IMA_FILE_APPRAISE 0x00001000
163 #define IMA_FILE_APPRAISED 0x00002000
164 #define IMA_MMAP_APPRAISE 0x00004000
165 #define IMA_MMAP_APPRAISED 0x00008000
166 #define IMA_BPRM_APPRAISE 0x00010000
167 #define IMA_BPRM_APPRAISED 0x00020000
168 #define IMA_READ_APPRAISE 0x00040000
169 #define IMA_READ_APPRAISED 0x00080000
170 #define IMA_CREDS_APPRAISE 0x00100000
171 #define IMA_CREDS_APPRAISED 0x00200000
172 #define IMA_APPRAISE_SUBMASK (IMA_FILE_APPRAISE | IMA_MMAP_APPRAISE | \
173 IMA_BPRM_APPRAISE | IMA_READ_APPRAISE | \
174 IMA_CREDS_APPRAISE)
175 #define IMA_APPRAISED_SUBMASK (IMA_FILE_APPRAISED | IMA_MMAP_APPRAISED | \
176 IMA_BPRM_APPRAISED | IMA_READ_APPRAISED | \
177 IMA_CREDS_APPRAISED)
178
179 /* IMA iint cache atomic_flags */
180 #define IMA_CHANGE_XATTR 0
181 #define IMA_UPDATE_XATTR 1
182 #define IMA_CHANGE_ATTR 2
183 #define IMA_DIGSIG 3
184 #define IMA_MAY_EMIT_TOMTOU 4
185 #define IMA_EMITTED_OPENWRITERS 5
186
187 /* IMA integrity metadata associated with an inode */
188 struct ima_iint_cache {
189 struct mutex mutex; /* protects: version, flags, digest */
190 struct integrity_inode_attributes real_inode;
191 unsigned long flags;
192 unsigned long measured_pcrs;
193 unsigned long atomic_flags;
194 enum integrity_status ima_file_status:4;
195 enum integrity_status ima_mmap_status:4;
196 enum integrity_status ima_bprm_status:4;
197 enum integrity_status ima_read_status:4;
198 enum integrity_status ima_creds_status:4;
199 struct ima_digest_data *ima_hash;
200 };
201
202 extern struct lsm_blob_sizes ima_blob_sizes;
203
204 static inline struct ima_iint_cache *
ima_inode_get_iint(const struct inode * inode)205 ima_inode_get_iint(const struct inode *inode)
206 {
207 struct ima_iint_cache **iint_sec;
208
209 if (unlikely(!inode->i_security))
210 return NULL;
211
212 iint_sec = inode->i_security + ima_blob_sizes.lbs_inode;
213 return *iint_sec;
214 }
215
ima_inode_set_iint(const struct inode * inode,struct ima_iint_cache * iint)216 static inline void ima_inode_set_iint(const struct inode *inode,
217 struct ima_iint_cache *iint)
218 {
219 struct ima_iint_cache **iint_sec;
220
221 if (unlikely(!inode->i_security))
222 return;
223
224 iint_sec = inode->i_security + ima_blob_sizes.lbs_inode;
225 *iint_sec = iint;
226 }
227
228 struct ima_iint_cache *ima_iint_find(struct inode *inode);
229 struct ima_iint_cache *ima_inode_get(struct inode *inode);
230 void ima_inode_free_rcu(void *inode_security);
231 void __init ima_iintcache_init(void);
232
233 extern const int read_idmap[];
234
235 #ifdef CONFIG_HAVE_IMA_KEXEC
236 void ima_load_kexec_buffer(void);
237 #else
ima_load_kexec_buffer(void)238 static inline void ima_load_kexec_buffer(void) {}
239 #endif /* CONFIG_HAVE_IMA_KEXEC */
240
241 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
242 void ima_post_key_create_or_update(struct key *keyring, struct key *key,
243 const void *payload, size_t plen,
244 unsigned long flags, bool create);
245 #endif
246
247 #ifdef CONFIG_IMA_KEXEC
248 void ima_measure_kexec_event(const char *event_name);
249 #else
ima_measure_kexec_event(const char * event_name)250 static inline void ima_measure_kexec_event(const char *event_name) {}
251 #endif
252
253 /*
254 * The default binary_runtime_measurements list format is defined as the
255 * platform native format. The canonical format is defined as little-endian.
256 */
257 extern bool ima_canonical_fmt;
258
259 /* Internal IMA function definitions */
260 int ima_init(void);
261 int ima_fs_init(void);
262 int ima_add_template_entry(struct ima_template_entry *entry, int violation,
263 const char *op, struct inode *inode,
264 const unsigned char *filename);
265 int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash);
266 int ima_calc_buffer_hash(const void *buf, loff_t len,
267 struct ima_digest_data *hash);
268 int ima_calc_field_array_hash(struct ima_field_data *field_data,
269 struct ima_template_entry *entry);
270 int ima_calc_boot_aggregate(struct ima_digest_data *hash);
271 void ima_add_violation(struct file *file, const unsigned char *filename,
272 struct ima_iint_cache *iint, const char *op,
273 const char *cause);
274 int ima_init_crypto(void);
275 void ima_putc(struct seq_file *m, void *data, int datalen);
276 void ima_print_digest(struct seq_file *m, u8 *digest, u32 size);
277 int template_desc_init_fields(const char *template_fmt,
278 const struct ima_template_field ***fields,
279 int *num_fields);
280 struct ima_template_desc *ima_template_desc_current(void);
281 struct ima_template_desc *ima_template_desc_buf(void);
282 struct ima_template_desc *lookup_template_desc(const char *name);
283 bool ima_template_has_modsig(const struct ima_template_desc *ima_template);
284 int ima_restore_measurement_entry(struct ima_template_entry *entry);
285 int ima_restore_measurement_list(loff_t bufsize, void *buf);
286 int ima_measurements_show(struct seq_file *m, void *v);
287 unsigned long ima_get_binary_runtime_size(void);
288 int ima_init_template(void);
289 void ima_init_template_list(void);
290 int __init ima_init_digests(void);
291 void __init ima_init_reboot_notifier(void);
292 int ima_lsm_policy_change(struct notifier_block *nb, unsigned long event,
293 void *lsm_data);
294
295 /*
296 * used to protect h_table and sha_table
297 */
298 extern spinlock_t ima_queue_lock;
299
300 struct ima_h_table {
301 atomic_long_t len; /* number of stored measurements in the list */
302 atomic_long_t violations;
303 struct hlist_head queue[IMA_MEASURE_HTABLE_SIZE];
304 };
305 extern struct ima_h_table ima_htable;
306
ima_hash_key(u8 * digest)307 static inline unsigned int ima_hash_key(u8 *digest)
308 {
309 /* there is no point in taking a hash of part of a digest */
310 return (digest[0] | digest[1] << 8) % IMA_MEASURE_HTABLE_SIZE;
311 }
312
313 #define __ima_hooks(hook) \
314 hook(NONE, none) \
315 hook(FILE_CHECK, file) \
316 hook(MMAP_CHECK, mmap) \
317 hook(MMAP_CHECK_REQPROT, mmap_reqprot) \
318 hook(BPRM_CHECK, bprm) \
319 hook(CREDS_CHECK, creds) \
320 hook(POST_SETATTR, post_setattr) \
321 hook(MODULE_CHECK, module) \
322 hook(FIRMWARE_CHECK, firmware) \
323 hook(KEXEC_KERNEL_CHECK, kexec_kernel) \
324 hook(KEXEC_INITRAMFS_CHECK, kexec_initramfs) \
325 hook(POLICY_CHECK, policy) \
326 hook(KEXEC_CMDLINE, kexec_cmdline) \
327 hook(KEY_CHECK, key) \
328 hook(CRITICAL_DATA, critical_data) \
329 hook(SETXATTR_CHECK, setxattr_check) \
330 hook(MAX_CHECK, none)
331
332 #define __ima_hook_enumify(ENUM, str) ENUM,
333 #define __ima_stringify(arg) (#arg)
334 #define __ima_hook_measuring_stringify(ENUM, str) \
335 (__ima_stringify(measuring_ ##str)),
336
337 enum ima_hooks {
338 __ima_hooks(__ima_hook_enumify)
339 };
340
341 static const char * const ima_hooks_measure_str[] = {
342 __ima_hooks(__ima_hook_measuring_stringify)
343 };
344
func_measure_str(enum ima_hooks func)345 static inline const char *func_measure_str(enum ima_hooks func)
346 {
347 if (func >= MAX_CHECK)
348 return ima_hooks_measure_str[NONE];
349
350 return ima_hooks_measure_str[func];
351 }
352
353 extern const char *const func_tokens[];
354
355 struct modsig;
356
357 #ifdef CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS
358 /*
359 * To track keys that need to be measured.
360 */
361 struct ima_key_entry {
362 struct list_head list;
363 void *payload;
364 size_t payload_len;
365 char *keyring_name;
366 };
367 void ima_init_key_queue(void);
368 bool ima_should_queue_key(void);
369 bool ima_queue_key(struct key *keyring, const void *payload,
370 size_t payload_len);
371 void ima_process_queued_keys(void);
372 #else
ima_init_key_queue(void)373 static inline void ima_init_key_queue(void) {}
ima_should_queue_key(void)374 static inline bool ima_should_queue_key(void) { return false; }
ima_queue_key(struct key * keyring,const void * payload,size_t payload_len)375 static inline bool ima_queue_key(struct key *keyring,
376 const void *payload,
377 size_t payload_len) { return false; }
ima_process_queued_keys(void)378 static inline void ima_process_queued_keys(void) {}
379 #endif /* CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS */
380
381 /* LIM API function definitions */
382 int ima_get_action(struct mnt_idmap *idmap, struct inode *inode,
383 const struct cred *cred, struct lsm_prop *prop, int mask,
384 enum ima_hooks func, int *pcr,
385 struct ima_template_desc **template_desc,
386 const char *func_data, unsigned int *allowed_algos);
387 int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func);
388 int ima_collect_measurement(struct ima_iint_cache *iint, struct file *file,
389 void *buf, loff_t size, enum hash_algo algo,
390 struct modsig *modsig);
391 void ima_store_measurement(struct ima_iint_cache *iint, struct file *file,
392 const unsigned char *filename,
393 struct evm_ima_xattr_data *xattr_value,
394 int xattr_len, const struct modsig *modsig, int pcr,
395 struct ima_template_desc *template_desc);
396 int process_buffer_measurement(struct mnt_idmap *idmap,
397 struct inode *inode, const void *buf, int size,
398 const char *eventname, enum ima_hooks func,
399 int pcr, const char *func_data,
400 bool buf_hash, u8 *digest, size_t digest_len);
401 void ima_audit_measurement(struct ima_iint_cache *iint,
402 const unsigned char *filename);
403 int ima_alloc_init_template(struct ima_event_data *event_data,
404 struct ima_template_entry **entry,
405 struct ima_template_desc *template_desc);
406 int ima_store_template(struct ima_template_entry *entry, int violation,
407 struct inode *inode,
408 const unsigned char *filename, int pcr);
409 void ima_free_template_entry(struct ima_template_entry *entry);
410 const char *ima_d_path(const struct path *path, char **pathbuf, char *filename);
411
412 /* IMA policy related functions */
413 int ima_match_policy(struct mnt_idmap *idmap, struct inode *inode,
414 const struct cred *cred, struct lsm_prop *prop,
415 enum ima_hooks func, int mask, int flags, int *pcr,
416 struct ima_template_desc **template_desc,
417 const char *func_data, unsigned int *allowed_algos);
418 void ima_init_policy(void);
419 void ima_update_policy(void);
420 void ima_update_policy_flags(void);
421 ssize_t ima_parse_add_rule(char *);
422 void ima_delete_rules(void);
423 int ima_check_policy(void);
424 void *ima_policy_start(struct seq_file *m, loff_t *pos);
425 void *ima_policy_next(struct seq_file *m, void *v, loff_t *pos);
426 void ima_policy_stop(struct seq_file *m, void *v);
427 int ima_policy_show(struct seq_file *m, void *v);
428
429 /* Appraise integrity measurements */
430 #define IMA_APPRAISE_ENFORCE 0x01
431 #define IMA_APPRAISE_FIX 0x02
432 #define IMA_APPRAISE_LOG 0x04
433 #define IMA_APPRAISE_MODULES 0x08
434 #define IMA_APPRAISE_FIRMWARE 0x10
435 #define IMA_APPRAISE_POLICY 0x20
436 #define IMA_APPRAISE_KEXEC 0x40
437
438 #ifdef CONFIG_IMA_APPRAISE
439 int ima_check_blacklist(struct ima_iint_cache *iint,
440 const struct modsig *modsig, int pcr);
441 int ima_appraise_measurement(enum ima_hooks func, struct ima_iint_cache *iint,
442 struct file *file, const unsigned char *filename,
443 struct evm_ima_xattr_data *xattr_value,
444 int xattr_len, const struct modsig *modsig);
445 int ima_must_appraise(struct mnt_idmap *idmap, struct inode *inode,
446 int mask, enum ima_hooks func);
447 void ima_update_xattr(struct ima_iint_cache *iint, struct file *file);
448 enum integrity_status ima_get_cache_status(struct ima_iint_cache *iint,
449 enum ima_hooks func);
450 enum hash_algo ima_get_hash_algo(const struct evm_ima_xattr_data *xattr_value,
451 int xattr_len);
452 int ima_read_xattr(struct dentry *dentry,
453 struct evm_ima_xattr_data **xattr_value, int xattr_len);
454 void __init init_ima_appraise_lsm(const struct lsm_id *lsmid);
455
456 #else
ima_check_blacklist(struct ima_iint_cache * iint,const struct modsig * modsig,int pcr)457 static inline int ima_check_blacklist(struct ima_iint_cache *iint,
458 const struct modsig *modsig, int pcr)
459 {
460 return 0;
461 }
462
ima_appraise_measurement(enum ima_hooks func,struct ima_iint_cache * iint,struct file * file,const unsigned char * filename,struct evm_ima_xattr_data * xattr_value,int xattr_len,const struct modsig * modsig)463 static inline int ima_appraise_measurement(enum ima_hooks func,
464 struct ima_iint_cache *iint,
465 struct file *file,
466 const unsigned char *filename,
467 struct evm_ima_xattr_data *xattr_value,
468 int xattr_len,
469 const struct modsig *modsig)
470 {
471 return INTEGRITY_UNKNOWN;
472 }
473
ima_must_appraise(struct mnt_idmap * idmap,struct inode * inode,int mask,enum ima_hooks func)474 static inline int ima_must_appraise(struct mnt_idmap *idmap,
475 struct inode *inode, int mask,
476 enum ima_hooks func)
477 {
478 return 0;
479 }
480
ima_update_xattr(struct ima_iint_cache * iint,struct file * file)481 static inline void ima_update_xattr(struct ima_iint_cache *iint,
482 struct file *file)
483 {
484 }
485
486 static inline enum integrity_status
ima_get_cache_status(struct ima_iint_cache * iint,enum ima_hooks func)487 ima_get_cache_status(struct ima_iint_cache *iint, enum ima_hooks func)
488 {
489 return INTEGRITY_UNKNOWN;
490 }
491
492 static inline enum hash_algo
ima_get_hash_algo(struct evm_ima_xattr_data * xattr_value,int xattr_len)493 ima_get_hash_algo(struct evm_ima_xattr_data *xattr_value, int xattr_len)
494 {
495 return ima_hash_algo;
496 }
497
ima_read_xattr(struct dentry * dentry,struct evm_ima_xattr_data ** xattr_value,int xattr_len)498 static inline int ima_read_xattr(struct dentry *dentry,
499 struct evm_ima_xattr_data **xattr_value,
500 int xattr_len)
501 {
502 return 0;
503 }
504
init_ima_appraise_lsm(const struct lsm_id * lsmid)505 static inline void __init init_ima_appraise_lsm(const struct lsm_id *lsmid)
506 {
507 }
508
509 #endif /* CONFIG_IMA_APPRAISE */
510
511 #ifdef CONFIG_IMA_APPRAISE_MODSIG
512 int ima_read_modsig(enum ima_hooks func, const void *buf, loff_t buf_len,
513 struct modsig **modsig);
514 void ima_collect_modsig(struct modsig *modsig, const void *buf, loff_t size);
515 int ima_get_modsig_digest(const struct modsig *modsig, enum hash_algo *algo,
516 const u8 **digest, u32 *digest_size);
517 int ima_get_raw_modsig(const struct modsig *modsig, const void **data,
518 u32 *data_len);
519 void ima_free_modsig(struct modsig *modsig);
520 #else
ima_read_modsig(enum ima_hooks func,const void * buf,loff_t buf_len,struct modsig ** modsig)521 static inline int ima_read_modsig(enum ima_hooks func, const void *buf,
522 loff_t buf_len, struct modsig **modsig)
523 {
524 return -EOPNOTSUPP;
525 }
526
ima_collect_modsig(struct modsig * modsig,const void * buf,loff_t size)527 static inline void ima_collect_modsig(struct modsig *modsig, const void *buf,
528 loff_t size)
529 {
530 }
531
ima_get_modsig_digest(const struct modsig * modsig,enum hash_algo * algo,const u8 ** digest,u32 * digest_size)532 static inline int ima_get_modsig_digest(const struct modsig *modsig,
533 enum hash_algo *algo, const u8 **digest,
534 u32 *digest_size)
535 {
536 return -EOPNOTSUPP;
537 }
538
ima_get_raw_modsig(const struct modsig * modsig,const void ** data,u32 * data_len)539 static inline int ima_get_raw_modsig(const struct modsig *modsig,
540 const void **data, u32 *data_len)
541 {
542 return -EOPNOTSUPP;
543 }
544
ima_free_modsig(struct modsig * modsig)545 static inline void ima_free_modsig(struct modsig *modsig)
546 {
547 }
548 #endif /* CONFIG_IMA_APPRAISE_MODSIG */
549
550 /* LSM based policy rules require audit */
551 #ifdef CONFIG_IMA_LSM_RULES
552
553 #define ima_filter_rule_init security_audit_rule_init
554 #define ima_filter_rule_free security_audit_rule_free
555 #define ima_filter_rule_match security_audit_rule_match
556
557 #else
558
ima_filter_rule_init(u32 field,u32 op,char * rulestr,void ** lsmrule,gfp_t gfp)559 static inline int ima_filter_rule_init(u32 field, u32 op, char *rulestr,
560 void **lsmrule, gfp_t gfp)
561 {
562 return -EINVAL;
563 }
564
ima_filter_rule_free(void * lsmrule)565 static inline void ima_filter_rule_free(void *lsmrule)
566 {
567 }
568
ima_filter_rule_match(struct lsm_prop * prop,u32 field,u32 op,void * lsmrule)569 static inline int ima_filter_rule_match(struct lsm_prop *prop, u32 field, u32 op,
570 void *lsmrule)
571 {
572 return -EINVAL;
573 }
574 #endif /* CONFIG_IMA_LSM_RULES */
575
576 #ifdef CONFIG_IMA_READ_POLICY
577 #define POLICY_FILE_FLAGS (S_IWUSR | S_IRUSR)
578 #else
579 #define POLICY_FILE_FLAGS S_IWUSR
580 #endif /* CONFIG_IMA_READ_POLICY */
581
582 #endif /* __LINUX_IMA_H */
583