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 | FS_VERITY_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 | FS_XFLAG_VERITY)
16
17 /* Read-only inode flags */
18 #define FS_XFLAG_RDONLY_MASK \
19 (FS_XFLAG_PREALLOC | FS_XFLAG_HASATTR | FS_XFLAG_VERITY | \
20 FS_XFLAG_CASEFOLD | FS_XFLAG_CASENONPRESERVING)
21
22 /* Flags to indicate valid value of fsx_ fields */
23 #define FS_XFLAG_VALUES_MASK \
24 (FS_XFLAG_EXTSIZE | FS_XFLAG_COWEXTSIZE)
25
26 /* Flags for directories */
27 #define FS_XFLAG_DIRONLY_MASK \
28 (FS_XFLAG_RTINHERIT | FS_XFLAG_NOSYMLINKS | FS_XFLAG_EXTSZINHERIT)
29
30 /* Misc settable flags */
31 #define FS_XFLAG_MISC_MASK \
32 (FS_XFLAG_REALTIME | FS_XFLAG_NODEFRAG | FS_XFLAG_FILESTREAM)
33
34 #define FS_XFLAGS_MASK \
35 (FS_XFLAG_COMMON | FS_XFLAG_RDONLY_MASK | FS_XFLAG_VALUES_MASK | \
36 FS_XFLAG_DIRONLY_MASK | FS_XFLAG_MISC_MASK)
37
38 /*
39 * Merged interface for miscellaneous file attributes. 'flags' originates from
40 * ext* and 'fsx_flags' from xfs. There's some overlap between the two, which
41 * is handled by the VFS helpers, so filesystems are free to implement just one
42 * or both of these sub-interfaces.
43 */
44 struct file_kattr {
45 u32 flags; /* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */
46 /* struct fsxattr: */
47 u32 fsx_xflags; /* xflags field value (get/set) */
48 u32 fsx_extsize; /* extsize field value (get/set)*/
49 u32 fsx_nextents; /* nextents field value (get) */
50 u32 fsx_projid; /* project identifier (get/set) */
51 u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
52 /* selectors: */
53 bool flags_valid:1;
54 bool fsx_valid:1;
55 };
56
57 int copy_fsxattr_to_user(const struct file_kattr *fa, struct fsxattr __user *ufa);
58
59 void fileattr_fill_xflags(struct file_kattr *fa, u32 xflags);
60 void fileattr_fill_flags(struct file_kattr *fa, u32 flags);
61
62 /**
63 * fileattr_has_fsx - check for extended flags/attributes
64 * @fa: fileattr pointer
65 *
66 * Return: true if any attributes are present that are not represented in
67 * ->flags.
68 */
fileattr_has_fsx(const struct file_kattr * fa)69 static inline bool fileattr_has_fsx(const struct file_kattr *fa)
70 {
71 return fa->fsx_valid &&
72 ((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 ||
73 fa->fsx_projid != 0 || fa->fsx_cowextsize != 0);
74 }
75
76 int vfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa);
77 int vfs_fileattr_set(const struct mnt_idmap *idmap, struct dentry *dentry,
78 struct file_kattr *fa);
79 int ioctl_getflags(struct file *file, unsigned int __user *argp);
80 int ioctl_setflags(struct file *file, unsigned int __user *argp);
81 int ioctl_fsgetxattr(struct file *file, void __user *argp);
82 int ioctl_fssetxattr(struct file *file, void __user *argp);
83
84 #endif /* _LINUX_FILEATTR_H */
85