key_task_permission

函数名称：key_task_permission - Check a key can be used*@key_ref: The key to check.*@cred: The credentials to use.*@perm: The permissions to check for.* Check to see whether permission is granted to use a key in the desired way,

函数原型：int key_task_permission(const key_ref_t key_ref, const struct cred *cred, unsigned perm)

返回类型：int

参数：

类型	参数	名称
const key_ref_t	key_ref
const struct cred *	cred
unsigned	perm

**调用者**
名称	描述
search_nested_keyrings	Search a tree of keyrings that point to other keyrings up to the maximum* depth.
keyring_search_rcu	keyring_search_rcu - Search a keyring tree for a matching key under RCU*@keyring_ref: A pointer to the keyring with possession indicator
lookup_user_key	Look up a key ID given us by userspace with a given permissions mask to get* the key it refers to.* Flags can be passed to request that special keyrings be created if referred* to directly, to permit partially constructed keys to be found and to skip
request_key_and_link	quest_key_and_link - Request a key and cache it in a keyring.@type: The type of key we want.@description: The searchable description of the key.*@domain_tag: The domain in which the key operates.
proc_keys_show
key_get_persistent	Get the persistent keyring for a specific UID and link it to the nominated* keyring.

函数逻辑报告