函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\keys\keyctl.c Create Date:2022-07-27 19:54:25
Last Modify:2020-03-18 07:59:52 Copyright©Brick
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函数名称：Create a link from a keyring to a key if there's no matching key in the* keyring, otherwise replace the link to the matching key with a link to the* new key.* The key must grant the caller Link permission and the the keyring must grant

函数原型：long keyctl_keyring_link(key_serial_t id, key_serial_t ringid)

返回类型：long

参数：

类型参数名称
key_serial_tid
key_serial_tringid
520  keyring_ref等于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
521  如果是错误则
522  ret等于错误
523  转到:error
526  key_ref等于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
527  如果是错误则
528  ret等于错误
529  转到:error2
532  ret等于key_link - Link a key to a keyring*@keyring: The keyring to make the link in
534  key_ref_put(key_ref)
535  error2 :
536  key_ref_put(keyring_ref)
537  error :
538  返回:ret
调用者
名称描述
SYSCALL_DEFINE5The key control system call
COMPAT_SYSCALL_DEFINE5The key control system call, 32-bit compatibility version for 64-bit archs