函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\keys\keyring.c Create Date:2022-07-27 19:53:03
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Lock keyrings for move (link/unlink combination).

函数原型：int __key_move_lock(struct key *l_keyring, struct key *u_keyring, const struct keyring_index_key *index_key)__acquires(&l_keyring->sem) __acquires(&u_keyring->sem) __acquires(&keyring_serialise_link_lock)

返回类型：int

参数：

类型参数名称
struct key *l_keyring
struct key *u_keyring
const struct keyring_index_key *index_key
1266  如果 type of key 不等于key_type_keyring或 type of key 不等于key_type_keyring则返回:负ENOTDIR
1274  如果l_keyring小于u_keyring则
1275  lock for writing
1276  down_write_nested( & change vs change sem , 1)
1277  否则
1278  lock for writing
1279  down_write_nested( & change vs change sem , 1)
1285  如果type恒等于key_type_keyring则mutex_lock( & Semaphore to serialise link/link calls to prevent two link calls in parallel* introducing a cycle.)
1288  返回:0
调用者
名称描述
key_movekey_move - Move a key from one keyring to another*@key: The key to move*@from_keyring: The keyring to remove the link from