Hi, This patchset is base on [1] and [2], adding implementation of ACLs for ubifs. Implement ACLs features based on POSIX to solve some difficulties that require fine-grained access control. At the same time, it is also to facilitate cross-file system migration. In order to simplify the implementation, only v2 version POSIX ACLs are implemented, eliminating the need for in-memory and on-flash format conversion. And no need to implement security xattr handler in ubifs. Some testcases have been tested and passed: * generic testcases (modified version) for acl group in xfstest[3], they are generic/026/053/077/099/105/237/307/318/319/375/389/444/449/529/697. * tacl_xattr.sh (modified version) in LTP[4]. [1]: https://lore.kernel.org/linux-mtd/1441962597-13543-1-git-send-email-shengyong1@xxxxxxxxxx/ [2]: https://lore.kernel.org/linux-mtd/1476046382-19185-1-git-send-email-pascal.eberhard@xxxxxxxxx/ [3]: https://kernel.googlesource.com/pub/scm/fs/xfs/xfstests-dev/+/refs/heads/master/tests/generic/ [4]: https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/fs/acl/tacl_xattr.sh Changelog: v1 -> v2: * Adjust patch order. * Modify ubifs_xattr_remove to an external function to remove the * xattr of ACL. * Fix handling of updating file mode via ACL. v1: https://lore.kernel.org/all/20240319161646.2153867-1-lizetao1@xxxxxxxxxx/ Li Zetao (5): ubifs: Add ACLs config option ubifs: Implement POSIX Access Control Lists (ACLs) ubifs: Initialize or update ACLs for inode ubifs: Support accessing ACLs through inode_operations ubifs: Introduce ACLs mount options Documentation/filesystems/ubifs.rst | 4 + fs/ubifs/Kconfig | 14 ++ fs/ubifs/Makefile | 1 + fs/ubifs/acl.c | 192 ++++++++++++++++++++++++++++ fs/ubifs/dir.c | 22 ++++ fs/ubifs/file.c | 6 + fs/ubifs/super.c | 41 ++++++ fs/ubifs/ubifs.h | 16 +++ fs/ubifs/xattr.c | 3 +- 9 files changed, 297 insertions(+), 2 deletions(-) create mode 100644 fs/ubifs/acl.c -- 2.34.1
