函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\resctrl\rdtgroup.c Create Date:2022-07-27 09:11:29
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：dtgroup_kn_mode_restrict - Restrict user access to named resctrl file*@r: The resource group with which the file is associated.*@name: Name of the file* The permissions of named resctrl file, directory, or link are modified

函数原型：int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name)

返回类型：int

参数：

类型参数名称
struct rdtgroup *r
const char *name
1531  struct iattr iattr = {ia_valid = Attribute flags. These should be or-ed together to figure out what* has been changed!, }
1533  ret等于0
1535  kn等于kernfs_find_and_get_ns(kn, name, NULL)
1536  如果非kn则返回:负ENOENT
1540  当:kernfs_type(kn)恒等于KERNFS_DIR
1541  ia_mode等于S_IFDIR
1542  退出
1543  当:kernfs_type(kn)恒等于KERNFS_FILE
1544  ia_mode等于S_IFREG
1545  退出
1546  当:kernfs_type(kn)恒等于KERNFS_LINK
1547  ia_mode等于S_IFLNK
1548  退出
1551  ret等于kernfs_setattr(kn, & iattr)
1552  kernfs_put(kn)
1553  返回:ret
调用者
名称描述
rdtgroup_locksetup_user_restrictdtgroup_locksetup_user_restrict - Restrict user access to group*@rdtgrp: resource group needing access restricted* A resource group used for cache pseudo-locking cannot have cpus or tasks* assigned to it
rdtgroup_locksetup_user_restoredtgroup_locksetup_user_restore - Restore user access to group*@rdtgrp: resource group needing access restored* Restore all file access previously removed using* rdtgroup_locksetup_user_restrict()* Return: 0 on success, <0 on failure