函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\open.c Create Date:2022-07-29 10:30:58
Last Modify:2020-03-18 10:16:03 Copyright©Brick
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函数名称：ksys_chroot

函数原型：int ksys_chroot(const char __user *filename)

返回类型：int

参数：

类型参数名称
const char __user *filename
510  lookup_flags等于llow links at the end 按位或quire a directory
511  retry :
512  error等于user_path_at(Special value used to indicateopenat should use the currentworking directory. , filename, lookup_flags, & path)
513  如果error则转到:out
516  error等于inode_permission( Where the name belongs to - NULL is * negative , MAY_EXEC | MAY_CHDIR)
517  如果error则转到:dput_and_out
520  error等于负EPERM
521  如果非ns_capable(current_user_ns(), Allow use of chroot() )则转到:dput_and_out
523  error等于security_path_chroot( & path)
524  如果error则转到:dput_and_out
527  set_fs_root(fs, & path)
528  error等于0
529  dput_and_out :
530  path_put( & path)
531  如果ry_estale - determine whether the caller should retry an operation*@error: the error that would currently be returned*@flags: flags being used for next lookup attempt* Check to see if the error code was -ESTALE, and then determine whether则
532  lookup_flags或等于ll ->d_revalidate() to trust no cache
533  转到:retry
535  out :
536  返回:error
调用者
名称描述
init_linuxrc
handle_initrd
SYSCALL_DEFINE1
prepare_namespacePrepare the namespace - decide what/where to mount, load ramdisks, etc.