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authorLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 12:04:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 12:04:02 -0800
commitbac5e54c29f352d962a2447d22735316b347b9f1 (patch)
tree7642993fa93164835ffaa2dacd341388193f1979 /security/integrity/ima/ima_iint.c
parent529e89430d6c0d64db8ac474cb95e68e2527c79a (diff)
parentc05c4edd876b7ae92787d1295868afcb89b6a348 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (38 commits) direct I/O fallback sync simplification ocfs: stop using do_sync_mapping_range cleanup blockdev_direct_IO locking make generic_acl slightly more generic sanitize xattr handler prototypes libfs: move EXPORT_SYMBOL for d_alloc_name vfs: force reval of target when following LAST_BIND symlinks (try #7) ima: limit imbalance msg Untangling ima mess, part 3: kill dead code in ima Untangling ima mess, part 2: deal with counters Untangling ima mess, part 1: alloc_file() O_TRUNC open shouldn't fail after file truncation ima: call ima_inode_free ima_inode_free IMA: clean up the IMA counts updating code ima: only insert at inode creation time ima: valid return code from ima_inode_alloc fs: move get_empty_filp() deffinition to internal.h Sanitize exec_permission_lite() Kill cached_lookup() and real_lookup() Kill path_lookup_open() ... Trivial conflicts in fs/direct-io.c
Diffstat (limited to 'security/integrity/ima/ima_iint.c')
-rw-r--r--security/integrity/ima/ima_iint.c79
1 files changed, 12 insertions, 67 deletions
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
index a4e2b1dac94..fa592ff1ac1 100644
--- a/security/integrity/ima/ima_iint.c
+++ b/security/integrity/ima/ima_iint.c
@@ -19,8 +19,6 @@
#include <linux/radix-tree.h>
#include "ima.h"
-#define ima_iint_delete ima_inode_free
-
RADIX_TREE(ima_iint_store, GFP_ATOMIC);
DEFINE_SPINLOCK(ima_iint_lock);
@@ -45,22 +43,21 @@ out:
return iint;
}
-/* Allocate memory for the iint associated with the inode
- * from the iint_cache slab, initialize the iint, and
- * insert it into the radix tree.
- *
- * On success return a pointer to the iint; on failure return NULL.
+/**
+ * ima_inode_alloc - allocate an iint associated with an inode
+ * @inode: pointer to the inode
*/
-struct ima_iint_cache *ima_iint_insert(struct inode *inode)
+int ima_inode_alloc(struct inode *inode)
{
struct ima_iint_cache *iint = NULL;
int rc = 0;
if (!ima_initialized)
- return iint;
+ return 0;
+
iint = kmem_cache_alloc(iint_cache, GFP_NOFS);
if (!iint)
- return iint;
+ return -ENOMEM;
rc = radix_tree_preload(GFP_NOFS);
if (rc < 0)
@@ -70,65 +67,13 @@ struct ima_iint_cache *ima_iint_insert(struct inode *inode)
rc = radix_tree_insert(&ima_iint_store, (unsigned long)inode, iint);
spin_unlock(&ima_iint_lock);
out:
- if (rc < 0) {
+ if (rc < 0)
kmem_cache_free(iint_cache, iint);
- if (rc == -EEXIST) {
- spin_lock(&ima_iint_lock);
- iint = radix_tree_lookup(&ima_iint_store,
- (unsigned long)inode);
- spin_unlock(&ima_iint_lock);
- } else
- iint = NULL;
- }
- radix_tree_preload_end();
- return iint;
-}
-
-/**
- * ima_inode_alloc - allocate an iint associated with an inode
- * @inode: pointer to the inode
- *
- * Return 0 on success, 1 on failure.
- */
-int ima_inode_alloc(struct inode *inode)
-{
- struct ima_iint_cache *iint;
-
- if (!ima_initialized)
- return 0;
-
- iint = ima_iint_insert(inode);
- if (!iint)
- return 1;
- return 0;
-}
-
-/* ima_iint_find_insert_get - get the iint associated with an inode
- *
- * Most insertions are done at inode_alloc, except those allocated
- * before late_initcall. When the iint does not exist, allocate it,
- * initialize and insert it, and increment the iint refcount.
- *
- * (Can't initialize at security_initcall before any inodes are
- * allocated, got to wait at least until proc_init.)
- *
- * Return the iint.
- */
-struct ima_iint_cache *ima_iint_find_insert_get(struct inode *inode)
-{
- struct ima_iint_cache *iint = NULL;
- iint = ima_iint_find_get(inode);
- if (iint)
- return iint;
-
- iint = ima_iint_insert(inode);
- if (iint)
- kref_get(&iint->refcount);
+ radix_tree_preload_end();
- return iint;
+ return rc;
}
-EXPORT_SYMBOL_GPL(ima_iint_find_insert_get);
/* iint_free - called when the iint refcount goes to zero */
void iint_free(struct kref *kref)
@@ -164,12 +109,12 @@ void iint_rcu_free(struct rcu_head *rcu_head)
}
/**
- * ima_iint_delete - called on integrity_inode_free
+ * ima_inode_free - called on security_inode_free
* @inode: pointer to the inode
*
* Free the integrity information(iint) associated with an inode.
*/
-void ima_iint_delete(struct inode *inode)
+void ima_inode_free(struct inode *inode)
{
struct ima_iint_cache *iint;