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 */
23 struct 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
36 int copy_fsxattr_to_user(const struct fileattr *fa, struct fsxattr __user *ufa);
37
38 void fileattr_fill_xflags(struct fileattr *fa, u32 xflags);
39 void 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 */
48 static 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
55 int vfs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
56 int vfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
57 struct fileattr *fa);
58
59 #endif /* _LINUX_FILEATTR_H */
60
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