diff options
Diffstat (limited to 'security/apparmor/include/match.h')
| -rw-r--r-- | security/apparmor/include/match.h | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/security/apparmor/include/match.h b/security/apparmor/include/match.h index a1c04fe86790..add4c6726558 100644 --- a/security/apparmor/include/match.h +++ b/security/apparmor/include/match.h @@ -100,13 +100,15 @@ struct aa_dfa { struct table_header *tables[YYTD_ID_TSIZE]; }; +extern struct aa_dfa *nulldfa; + #define byte_to_byte(X) (X) -#define UNPACK_ARRAY(TABLE, BLOB, LEN, TYPE, NTOHX) \ +#define UNPACK_ARRAY(TABLE, BLOB, LEN, TTYPE, BTYPE, NTOHX) \ do { \ typeof(LEN) __i; \ - TYPE *__t = (TYPE *) TABLE; \ - TYPE *__b = (TYPE *) BLOB; \ + TTYPE *__t = (TTYPE *) TABLE; \ + BTYPE *__b = (BTYPE *) BLOB; \ for (__i = 0; __i < LEN; __i++) { \ __t[__i] = NTOHX(__b[__i]); \ } \ @@ -117,6 +119,9 @@ static inline size_t table_size(size_t len, size_t el_size) return ALIGN(sizeof(struct table_header) + len * el_size, 8); } +int aa_setup_dfa_engine(void); +void aa_teardown_dfa_engine(void); + struct aa_dfa *aa_dfa_unpack(void *blob, size_t size, int flags); unsigned int aa_dfa_match_len(struct aa_dfa *dfa, unsigned int start, const char *str, int len); @@ -128,6 +133,21 @@ unsigned int aa_dfa_next(struct aa_dfa *dfa, unsigned int state, void aa_dfa_free_kref(struct kref *kref); /** + * aa_get_dfa - increment refcount on dfa @p + * @dfa: dfa (MAYBE NULL) + * + * Returns: pointer to @dfa if @dfa is NULL will return NULL + * Requires: @dfa must be held with valid refcount when called + */ +static inline struct aa_dfa *aa_get_dfa(struct aa_dfa *dfa) +{ + if (dfa) + kref_get(&(dfa->count)); + + return dfa; +} + +/** * aa_put_dfa - put a dfa refcount * @dfa: dfa to put refcount (MAYBE NULL) * |