1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef _LINUX_FILEATTR_H
4#define _LINUX_FILEATTR_H
5
6/* Flags shared betwen flags/xflags */
7#define FS_COMMON_FL \
8	(FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \
9	 FS_NODUMP_FL |	FS_NOATIME_FL | FS_DAX_FL | \
10	 FS_PROJINHERIT_FL)
11
12#define FS_XFLAG_COMMON \
13	(FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \
14	 FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \
15	 FS_XFLAG_PROJINHERIT)
16
17/*
18 * Merged interface for miscellaneous file attributes.  'flags' originates from
19 * ext* and 'fsx_flags' from xfs.  There's some overlap between the two, which
20 * is handled by the VFS helpers, so filesystems are free to implement just one
21 * or both of these sub-interfaces.
22 */
23struct fileattr {
24	u32	flags;		/* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */
25	/* struct fsxattr: */
26	u32	fsx_xflags;	/* xflags field value (get/set) */
27	u32	fsx_extsize;	/* extsize field value (get/set)*/
28	u32	fsx_nextents;	/* nextents field value (get)	*/
29	u32	fsx_projid;	/* project identifier (get/set) */
30	u32	fsx_cowextsize;	/* CoW extsize field value (get/set)*/
31	/* selectors: */
32	bool	flags_valid:1;
33	bool	fsx_valid:1;
34};
35
36int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa);
37
38void fileattr_fill_xflags(struct fileattr *fa, u32 xflags);
39void fileattr_fill_flags(struct fileattr *fa, u32 flags);
40
41/**
42 * fileattr_has_fsx - check for extended flags/attributes
43 * @fa:		fileattr pointer
44 *
45 * Return: true if any attributes are present that are not represented in
46 * ->flags.
47 */
48static inline bool fileattr_has_fsx(const struct fileattr *fa)
49{
50	return fa->fsx_valid &&
51		((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 ||
52		 fa->fsx_projid != 0 ||	fa->fsx_cowextsize != 0);
53}
54
55int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
56int vfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
57		     struct fileattr *fa);
58
59#endif /* _LINUX_FILEATTR_H */
60