Untangling ima mess, part 3: kill dead code in ima
Kill the 'update' argument of ima_path_check(), kill
dead code in ima.
Current rules: ima counters are bumped at the same time
when the file switches from put_filp() fodder to fput()
one. Which happens exactly in two places - alloc_file()
and __dentry_open(). Nothing else needs to do that at
all.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index e041233..16dc57d 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -50,19 +50,12 @@
}
/*
- * Update the counts given open flags instead of fmode
- */
-static void ima_inc_counts_flags(struct ima_iint_cache *iint, int flags)
-{
- ima_inc_counts(iint, (__force fmode_t)((flags+1) & O_ACCMODE));
-}
-
-/*
* Decrement ima counts
*/
static void ima_dec_counts(struct ima_iint_cache *iint, struct inode *inode,
- fmode_t mode)
+ struct file *file)
{
+ mode_t mode = file->f_mode;
BUG_ON(!mutex_is_locked(&iint->mutex));
iint->opencount--;
@@ -92,12 +85,6 @@
}
}
-static void ima_dec_counts_flags(struct ima_iint_cache *iint,
- struct inode *inode, int flags)
-{
- ima_dec_counts(iint, inode, (__force fmode_t)((flags+1) & O_ACCMODE));
-}
-
/**
* ima_file_free - called on __fput()
* @file: pointer to file structure being freed
@@ -117,7 +104,7 @@
return;
mutex_lock(&iint->mutex);
- ima_dec_counts(iint, inode, file->f_mode);
+ ima_dec_counts(iint, inode, file);
mutex_unlock(&iint->mutex);
kref_put(&iint->refcount, iint_free);
}
@@ -183,7 +170,7 @@
* Always return 0 and audit dentry_open failures.
* (Return code will be based upon measurement appraisal.)
*/
-int ima_path_check(struct path *path, int mask, int update_counts)
+int ima_path_check(struct path *path, int mask)
{
struct inode *inode = path->dentry->d_inode;
struct ima_iint_cache *iint;
@@ -197,8 +184,6 @@
return 0;
mutex_lock(&iint->mutex);
- if (update_counts)
- ima_inc_counts_flags(iint, mask);
rc = ima_must_measure(iint, inode, MAY_READ, PATH_CHECK);
if (rc < 0)
@@ -269,35 +254,6 @@
}
/*
- * ima_counts_put - decrement file counts
- *
- * File counts are incremented in ima_path_check. On file open
- * error, such as ETXTBSY, decrement the counts to prevent
- * unnecessary imbalance messages.
- */
-void ima_counts_put(struct path *path, int mask)
-{
- struct inode *inode = path->dentry->d_inode;
- struct ima_iint_cache *iint;
-
- /* The inode may already have been freed, freeing the iint
- * with it. Verify the inode is not NULL before dereferencing
- * it.
- */
- if (!ima_initialized || !inode || !S_ISREG(inode->i_mode))
- return;
- iint = ima_iint_find_get(inode);
- if (!iint)
- return;
-
- mutex_lock(&iint->mutex);
- ima_dec_counts_flags(iint, inode, mask);
- mutex_unlock(&iint->mutex);
-
- kref_put(&iint->refcount, iint_free);
-}
-
-/*
* ima_counts_get - increment file counts
*
* - for IPC shm and shmat file.