函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\posix_acl.c Create Date:2022-07-29 11:05:02
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Convert from in-memory to extended attribute representation.

函数原型：int posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl, void *buffer, size_t size)

返回类型：int

参数：

类型参数名称
struct user_namespace *user_ns
const struct posix_acl *acl
void *buffer
size_tsize
800  ext_acl等于buffer
804  real_size等于posix_acl_xattr_size(a_count)
805  如果非buffer则返回:real_size
807  如果real_size大于size则返回:负ERANGE
810  ext_entry等于ext_acl加1
811  a_version等于cpu_to_le32(Supported ACL a_version fields )
813  以n小于a_count循环
814  acl_e等于a_entries[n]
815  e_tag等于cpu_to_le16(e_tag)
816  e_perm等于cpu_to_le16(e_perm)
818  当:e_tag恒等于ACL_USER
819  e_id等于cpu_to_le32(m_kuid - Create a uid from a kuid user-namespace pair.*@targ: The user namespace we want a uid in.*@kuid: The kernel internal uid to start with.* Map @kuid into the user-namespace specified by @targ and* return the resulting uid.)
821  退出
822  当:e_tag恒等于ACL_GROUP
823  e_id等于cpu_to_le32(m_kgid - Create a gid from a kgid user-namespace pair.*@targ: The user namespace we want a gid in.*@kgid: The kernel internal gid to start with.* Map @kgid into the user-namespace specified by @targ and* return the resulting gid.)
825  退出
826  默认
827  e_id等于cpu_to_le32(An undefined entry e_id value )
828  退出
831  返回:real_size
调用者
名称描述
posix_acl_xattr_get