diff options
| author | Eric Paris <eparis@redhat.com> | 2010-10-25 14:42:12 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-26 11:37:19 -0700 |
| commit | 64c62f06bef8314a64d3189cb9c78062d54169b3 (patch) | |
| tree | 63f542bf6a0de4eb2c9742376f7c314ac78e65ec /security/integrity/ima/ima_iint.c | |
| parent | bc7d2a3e66b40477270c3cbe3b89b47093276e7a (diff) | |
IMA: drop refcnt from ima_iint_cache since it isn't needed
Since finding a struct ima_iint_cache requires a valid struct inode, and
the struct ima_iint_cache is supposed to have the same lifetime as a
struct inode (technically they die together but don't need to be created
at the same time) we don't have to worry about the ima_iint_cache
outliving or dieing before the inode. So the refcnt isn't useful. Just
get rid of it and free the structure when the inode is freed.
Signed-off-by: Eric Paris <eapris@redhat.com>
Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/integrity/ima/ima_iint.c')
| -rw-r--r-- | security/integrity/ima/ima_iint.c | 38 |
1 files changed, 16 insertions, 22 deletions
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c index 0936a7197e4..969a1c1cb33 100644 --- a/security/integrity/ima/ima_iint.c +++ b/security/integrity/ima/ima_iint.c @@ -53,24 +53,26 @@ static struct ima_iint_cache *__ima_iint_find(struct inode *inode) } /* - * ima_iint_find_get - return the iint associated with an inode - * - * ima_iint_find_get gets a reference to the iint. Caller must - * remember to put the iint reference. + * ima_iint_find - return the iint associated with an inode */ -struct ima_iint_cache *ima_iint_find_get(struct inode *inode) +struct ima_iint_cache *ima_iint_find(struct inode *inode) { struct ima_iint_cache *iint; spin_lock(&ima_iint_lock); iint = __ima_iint_find(inode); - if (iint) - kref_get(&iint->refcount); spin_unlock(&ima_iint_lock); return iint; } +static void iint_free(struct ima_iint_cache *iint) +{ + iint->version = 0; + iint->flags = 0UL; + kmem_cache_free(iint_cache, iint); +} + /** * ima_inode_alloc - allocate an iint associated with an inode * @inode: pointer to the inode @@ -113,19 +115,9 @@ int ima_inode_alloc(struct inode *inode) return 0; out_err: spin_unlock(&ima_iint_lock); - kref_put(&new_iint->refcount, iint_free); - return rc; -} + iint_free(new_iint); -/* iint_free - called when the iint refcount goes to zero */ -void iint_free(struct kref *kref) -{ - struct ima_iint_cache *iint = container_of(kref, struct ima_iint_cache, - refcount); - iint->version = 0; - iint->flags = 0UL; - kref_init(&iint->refcount); - kmem_cache_free(iint_cache, iint); + return rc; } /** @@ -148,8 +140,11 @@ void ima_inode_free(struct inode *inode) if (iint) rb_erase(&iint->rb_node, &ima_iint_tree); spin_unlock(&ima_iint_lock); - if (iint) - kref_put(&iint->refcount, iint_free); + + if (!iint) + return; + + iint_free(iint); } static void init_once(void *foo) @@ -160,7 +155,6 @@ static void init_once(void *foo) iint->version = 0; iint->flags = 0UL; mutex_init(&iint->mutex); - kref_init(&iint->refcount); } static int __init ima_iintcache_init(void) |