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Commit 293a4886 authored by John Johansen's avatar John Johansen
Browse files

apparmor: add get_dfa() fn 



The dfa is currently setup to be shared (has the basis of refcounting)
but currently can't be because the count can't be increased.

Signed-off-by: default avatarJohn Johansen <john.johansen@canonical.com>
parent 474d6b75

security/apparmor/include/match.h

+15 −0
Original line number Diff line number Diff line
@@ -127,6 +127,21 @@ 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)