malloc.so.1 ./bazel-bin/curvefs/src/client/fuse_client -f -o volume=/fs -o allow_other -o default_permissions -o user=test -o conf=/curvefs/conf/curvefs_client.conf /tmp/fsmount root@pubbetal-nostest2:/tmp# hello.txt wanghai01@pubbetal-nostest2:/tmp/fsmount$ cat hello.txt hello world 结论：fuse挂载时使用`default_permissions`和`allow_other`可以达到共享文件系统下的基于内核权限检查的文件访问控制；或者可以在用户态文件系统中自由的实现访问控制策略。 ## 二、 文件系统权限管理 drwxr-xr-x interpret the xattr representation of ACLs. Enabling this feature implicitly turns on the default_permissions mount option (even if it was not passed to mount(2)). This feature is disabled by default.

O_RDWR) should be used by the filesystem to check if the operation is permitted. If the -o default_permissions mount option is given, this check is already done by the kernel before calling open() and may n.h> ## open flags 在curvefs上的测试 在现在的curvefs上进行open相关flag测试，发现已经支持部分open flags（mount 参数指定了default_permissions），VFS做了部分工作（如上open brief所述）： O_CREAT # O_WRONLY | O_CREAT, S_IWUSR root@pubbetal-nostest2:/tmp/fsmount#

or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). ## default_permissions ### Options.default_permissions Defaults to ('add', 'change', 'delete') improved behavior. ## Models • The QuerySet.update_or_create() method was added. • The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change 1179 default_lat (GeoModelAdmin attribute), 844 default_lon (GeoModelAdmin attribute), 844 default_permissions (Options attribute), 1073 default_related_name (Options attribute), 1070 DEFAULT_TABLESPACE

human_readable_permission_name). 6.15. Models 1135 Django Documentation, Release 2.0.14.dev20190701080343 default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete'). You may customize this the improved behavior. Models • The QuerySet.update_or_create() method was added. • The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change dev20190701080343 default_lon (OSMWidget attribute), 808 default_manager_name (Options attribute), 1132 default_permissions (Options attribute), 1136 default_related_name (Options attribute), 1132 default_renderer (Form

list or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete'). You may customize this from the improved behavior. Models The QuerySet.update_or_create() method was added. The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change attribute) default_lon (GeoModelAdmin attribute) default_manager_name (Options attribute) default_permissions (Options attribute) default_related_name (Options attribute) DEFAULT_TABLESPACE setting default_zoom

. 1150 Chapter 6. API Reference Django Documentation, Release 1.11.30.dev20200305075726 default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete'). You may customize this the improved behavior. Models • The QuerySet.update_or_create() method was added. • The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change 896 default_lon (OSMWidget attribute), 815 default_manager_name (Options attribute), 1147 default_permissions (Options attribute), 1151 default_related_name (Options attribute), 1147 default_renderer (Form

list or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete', 'view'). You may customize from the improved behavior. Models The QuerySet.update_or_create() method was added. The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change default_lon (GeoModelAdmin attribute) (OSMWidget attribute) default_manager_name (Options attribute) default_permissions (Options attribute) default_related_name (Options attribute) default_renderer (Form attribute)

list or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete'). You may customize this from the improved behavior. Models The QuerySet.update_or_create() method was added. The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change default_lon (GeoModelAdmin attribute) (OSMWidget attribute) default_manager_name (Options attribute) default_permissions (Options attribute) default_related_name (Options attribute) default_renderer (Form attribute)

list or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete', 'view'). You may customize from the improved behavior. Models The QuerySet.update_or_create() method was added. The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change default_lon (GeoModelAdmin attribute) (OSMWidget attribute) default_manager_name (Options attribute) default_permissions (Options attribute) default_related_name (Options attribute) default_renderer (Form attribute)

list or tuple of 2-tuples in the format (permission_code, human_readable_permission_name). default_permissions Options.default_permissions Defaults to ('add', 'change', 'delete', 'view'). You may customize from the improved behavior. Models The QuerySet.update_or_create() method was added. The new default_permissions model Meta option allows you to customize (or disable) creation of the default add, change default_lon (GeoModelAdmin attribute) (OSMWidget attribute) default_manager_name (Options attribute) default_permissions (Options attribute) default_related_name (Options attribute) default_renderer (Form attribute)