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137 lines
4.6 KiB
137 lines
4.6 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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/* |
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* Landlock - User space API |
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* |
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* Copyright © 2017-2020 Mickaël Salaün <[email protected]> |
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* Copyright © 2018-2020 ANSSI |
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*/ |
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#ifndef _UAPI_LINUX_LANDLOCK_H |
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#define _UAPI_LINUX_LANDLOCK_H |
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#include <linux/types.h> |
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/** |
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* struct landlock_ruleset_attr - Ruleset definition |
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* |
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* Argument of sys_landlock_create_ruleset(). This structure can grow in |
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* future versions. |
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*/ |
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struct landlock_ruleset_attr { |
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/** |
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* @handled_access_fs: Bitmask of actions (cf. `Filesystem flags`_) |
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* that is handled by this ruleset and should then be forbidden if no |
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* rule explicitly allow them. This is needed for backward |
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* compatibility reasons. |
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*/ |
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__u64 handled_access_fs; |
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}; |
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/* |
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* sys_landlock_create_ruleset() flags: |
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* |
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* - %LANDLOCK_CREATE_RULESET_VERSION: Get the highest supported Landlock ABI |
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* version. |
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*/ |
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#define LANDLOCK_CREATE_RULESET_VERSION (1U << 0) |
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/** |
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* enum landlock_rule_type - Landlock rule type |
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* |
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* Argument of sys_landlock_add_rule(). |
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*/ |
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enum landlock_rule_type { |
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/** |
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* @LANDLOCK_RULE_PATH_BENEATH: Type of a &struct |
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* landlock_path_beneath_attr . |
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*/ |
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LANDLOCK_RULE_PATH_BENEATH = 1, |
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}; |
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/** |
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* struct landlock_path_beneath_attr - Path hierarchy definition |
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* |
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* Argument of sys_landlock_add_rule(). |
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*/ |
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struct landlock_path_beneath_attr { |
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/** |
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* @allowed_access: Bitmask of allowed actions for this file hierarchy |
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* (cf. `Filesystem flags`_). |
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*/ |
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__u64 allowed_access; |
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/** |
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* @parent_fd: File descriptor, open with ``O_PATH``, which identifies |
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* the parent directory of a file hierarchy, or just a file. |
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*/ |
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__s32 parent_fd; |
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/* |
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* This struct is packed to avoid trailing reserved members. |
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* Cf. security/landlock/syscalls.c:build_check_abi() |
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*/ |
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} __attribute__((packed)); |
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/** |
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* DOC: fs_access |
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* |
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* A set of actions on kernel objects may be defined by an attribute (e.g. |
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* &struct landlock_path_beneath_attr) including a bitmask of access. |
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* |
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* Filesystem flags |
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* ~~~~~~~~~~~~~~~~ |
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* |
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* These flags enable to restrict a sandboxed process to a set of actions on |
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* files and directories. Files or directories opened before the sandboxing |
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* are not subject to these restrictions. |
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* |
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* A file can only receive these access rights: |
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* |
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* - %LANDLOCK_ACCESS_FS_EXECUTE: Execute a file. |
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* - %LANDLOCK_ACCESS_FS_WRITE_FILE: Open a file with write access. |
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* - %LANDLOCK_ACCESS_FS_READ_FILE: Open a file with read access. |
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* |
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* A directory can receive access rights related to files or directories. The |
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* following access right is applied to the directory itself, and the |
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* directories beneath it: |
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* |
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* - %LANDLOCK_ACCESS_FS_READ_DIR: Open a directory or list its content. |
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* |
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* However, the following access rights only apply to the content of a |
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* directory, not the directory itself: |
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* |
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* - %LANDLOCK_ACCESS_FS_REMOVE_DIR: Remove an empty directory or rename one. |
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* - %LANDLOCK_ACCESS_FS_REMOVE_FILE: Unlink (or rename) a file. |
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* - %LANDLOCK_ACCESS_FS_MAKE_CHAR: Create (or rename or link) a character |
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* device. |
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* - %LANDLOCK_ACCESS_FS_MAKE_DIR: Create (or rename) a directory. |
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* - %LANDLOCK_ACCESS_FS_MAKE_REG: Create (or rename or link) a regular file. |
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* - %LANDLOCK_ACCESS_FS_MAKE_SOCK: Create (or rename or link) a UNIX domain |
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* socket. |
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* - %LANDLOCK_ACCESS_FS_MAKE_FIFO: Create (or rename or link) a named pipe. |
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* - %LANDLOCK_ACCESS_FS_MAKE_BLOCK: Create (or rename or link) a block device. |
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* - %LANDLOCK_ACCESS_FS_MAKE_SYM: Create (or rename or link) a symbolic link. |
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* |
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* .. warning:: |
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* |
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* It is currently not possible to restrict some file-related actions |
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* accessible through these syscall families: :manpage:`chdir(2)`, |
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* :manpage:`truncate(2)`, :manpage:`stat(2)`, :manpage:`flock(2)`, |
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* :manpage:`chmod(2)`, :manpage:`chown(2)`, :manpage:`setxattr(2)`, |
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* :manpage:`utime(2)`, :manpage:`ioctl(2)`, :manpage:`fcntl(2)`, |
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* :manpage:`access(2)`. |
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* Future Landlock evolutions will enable to restrict them. |
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*/ |
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#define LANDLOCK_ACCESS_FS_EXECUTE (1ULL << 0) |
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#define LANDLOCK_ACCESS_FS_WRITE_FILE (1ULL << 1) |
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#define LANDLOCK_ACCESS_FS_READ_FILE (1ULL << 2) |
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#define LANDLOCK_ACCESS_FS_READ_DIR (1ULL << 3) |
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#define LANDLOCK_ACCESS_FS_REMOVE_DIR (1ULL << 4) |
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#define LANDLOCK_ACCESS_FS_REMOVE_FILE (1ULL << 5) |
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#define LANDLOCK_ACCESS_FS_MAKE_CHAR (1ULL << 6) |
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#define LANDLOCK_ACCESS_FS_MAKE_DIR (1ULL << 7) |
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#define LANDLOCK_ACCESS_FS_MAKE_REG (1ULL << 8) |
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#define LANDLOCK_ACCESS_FS_MAKE_SOCK (1ULL << 9) |
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#define LANDLOCK_ACCESS_FS_MAKE_FIFO (1ULL << 10) |
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#define LANDLOCK_ACCESS_FS_MAKE_BLOCK (1ULL << 11) |
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#define LANDLOCK_ACCESS_FS_MAKE_SYM (1ULL << 12) |
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#endif /* _UAPI_LINUX_LANDLOCK_H */
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