函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\fs_struct.c Create Date:2022-07-29 10:43:06
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：unshare_fs_struct

函数原型：int unshare_fs_struct(void)

返回类型：int

参数：无

135  fs等于fs
136  new_fs等于copy_fs_struct(fs)
139  如果非new_fs则返回:负ENOMEM
142  Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring* subscriptions and synchronises with wait4(). Also used in procfs. Also* pins the final release of task.io_context. Also protects ->cpuset and* ->cgroup.subsys[]. And ->vfork_done.
143  加自旋锁
144  kill等于非users先自减
145  fs等于new_fs
146  自旋锁解锁
147  task_unlock(当前进程)
149  如果kill则free_fs_struct(fs)
152  返回:0