函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\keys\internal.h Create Date:2022-07-27 19:49:25
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Check to see whether permission is granted to use a key in the desired way.

函数原型：static inline int key_permission(const key_ref_t key_ref, unsigned perm)

返回类型：int

参数：

类型参数名称
const key_ref_tkey_ref
unsignedperm
189  返回:key_task_permission(key_ref, current_cred - Access the current task's subjective credentials* Access the subjective credentials of the current task. RCU-safe,* since nobody else can modify it.(), perm)
调用者
名称描述
__key_updateAttempt to update an existing key.* The key is given to us with an incremented refcount that we need to discard* if we get an error.
key_create_or_updatekey_create_or_update - Update or create and instantiate a key.*@keyring_ref: A pointer to the destination keyring with possession flag.*@type: The type of key.*@description: The searchable description for the key.
key_updatekey_update - Update a key's contents.*@key_ref: The pointer (plus possession flag) to the key.*@payload: The data to be used to update the key.*@plen: The length of @payload.* Attempt to update the contents of a key with the given payload data. The
find_keyring_by_nameFind a keyring with the specified name
keyctl_keyring_searchSearch the specified keyring and any keyrings it links to for a matching* key
keyctl_read_keyRead a key's payload
construct_get_dest_keyringGet the appropriate destination keyring for the request.* The keyring selected is returned with an extra reference upon it which the* caller must release.