projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | /* |
| 3 | File: linux/posix_acl_xattr.h | |
| 4 | ||
| 5 | Extended attribute system call representation of Access Control Lists. | |
| 6 | ||
| 7 | Copyright (C) 2000 by Andreas Gruenbacher <a.gruenbacher@computer.org> | |
| 8 | Copyright (C) 2002 SGI - Silicon Graphics, Inc <linux-xfs@oss.sgi.com> | |
| 9 | */ | |
| 10 | #ifndef _POSIX_ACL_XATTR_H | |
| 11 | #define _POSIX_ACL_XATTR_H | |
| 12 | ||
| 97d79299 | 13 | #include <uapi/linux/xattr.h> |
| bc8bcf3b | 14 | #include <uapi/linux/posix_acl_xattr.h> |
| 1da177e4 LT |
15 | #include <linux/posix_acl.h> |
| 16 | ||
| 1da177e4 LT |
17 | static inline size_t |
| 18 | posix_acl_xattr_size(int count) | |
| 19 | { | |
| 2211d5ba AG |
20 | return (sizeof(struct posix_acl_xattr_header) + |
| 21 | (count * sizeof(struct posix_acl_xattr_entry))); | |
| 1da177e4 LT |
22 | } |
| 23 | ||
| 24 | static inline int | |
| 25 | posix_acl_xattr_count(size_t size) | |
| 26 | { | |
| 2211d5ba | 27 | if (size < sizeof(struct posix_acl_xattr_header)) |
| 1da177e4 | 28 | return -1; |
| 2211d5ba AG |
29 | size -= sizeof(struct posix_acl_xattr_header); |
| 30 | if (size % sizeof(struct posix_acl_xattr_entry)) | |
| 1da177e4 | 31 | return -1; |
| 2211d5ba | 32 | return size / sizeof(struct posix_acl_xattr_entry); |
| 1da177e4 LT |
33 | } |
| 34 | ||
| 2f6f0654 | 35 | #ifdef CONFIG_FS_POSIX_ACL |
| e65ce2a5 CB |
36 | void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, |
| 37 | void *value, size_t size); | |
| 38 | void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, | |
| 39 | void *value, size_t size); | |
| 2f6f0654 | 40 | #else |
| e65ce2a5 CB |
41 | static inline void posix_acl_fix_xattr_from_user(struct user_namespace *mnt_userns, |
| 42 | void *value, size_t size) | |
| 2f6f0654 EB |
43 | { |
| 44 | } | |
| e65ce2a5 CB |
45 | static inline void posix_acl_fix_xattr_to_user(struct user_namespace *mnt_userns, |
| 46 | void *value, size_t size) | |
| 2f6f0654 EB |
47 | { |
| 48 | } | |
| 49 | #endif | |
| 50 | ||
| 5f3a4a28 EB |
51 | struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns, |
| 52 | const void *value, size_t size); | |
| 53 | int posix_acl_to_xattr(struct user_namespace *user_ns, | |
| 54 | const struct posix_acl *acl, void *buffer, size_t size); | |
| 9a59f452 | 55 | |
| 2aeccbe9 CH |
56 | extern const struct xattr_handler posix_acl_access_xattr_handler; |
| 57 | extern const struct xattr_handler posix_acl_default_xattr_handler; | |
| 58 | ||
| 1da177e4 | 59 | #endif /* _POSIX_ACL_XATTR_H */ |