函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\umh.c Create Date:2022-07-27 10:22:47
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__usermodehelper_set_disable_depth - Modify usermodehelper_disabled.*@depth: New value to assign to usermodehelper_disabled.* Change the value of usermodehelper_disabled (under umhelper_sem locked for* writing) and wakeup tasks waiting for it to change.

函数原型：void __usermodehelper_set_disable_depth(enum umh_disable_depth depth)

返回类型：void

参数：

类型参数名称
enum umh_disable_depthdepth
305  lock for writing
306  If set, call_usermodehelper_exec() will exit immediately returning -EBUSY* (used for preventing user land processes from being created after the user* land has been frozen during a system-wide hibernation or suspend operation).等于depth
307  wake_up( & Used by usermodehelper_read_lock_wait() to wait for usermodehelper_disabled* to become 'false'.)
308  lease a write lock
调用者
名称描述
__usermodehelper_disable__usermodehelper_disable - Prevent new helpers from being started.*@depth: New value to assign to usermodehelper_disabled.* Set usermodehelper_disabled to @depth and wait for running helpers to exit.
freeze_processesze_processes - Signal user space processes to enter the refrigerator.* The current thread will not be frozen. The same process that calls* freeze_processes must later call thaw_processes.* On success, returns 0
thaw_processes