1 files changed, 83 insertions, 0 deletions
diff --git a/include/linux/fileattr.h b/include/linux/fileattr.h
new file mode 100644
index 000000000000..f89dcfad3f8f
--- /dev/null
+++ b/include/linux/fileattr.h
@@ -0,0 +1,83 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _LINUX_FILEATTR_H
+#define _LINUX_FILEATTR_H
+
+/* Flags shared betwen flags/xflags */
+#define FS_COMMON_FL \
+	(FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \
+	 FS_NODUMP_FL |	FS_NOATIME_FL | FS_DAX_FL | \
+	 FS_PROJINHERIT_FL)
+
+#define FS_XFLAG_COMMON \
+	(FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND | \
+	 FS_XFLAG_NODUMP | FS_XFLAG_NOATIME | FS_XFLAG_DAX | \
+	 FS_XFLAG_PROJINHERIT)
+
+/* Read-only inode flags */
+#define FS_XFLAG_RDONLY_MASK \
+	(FS_XFLAG_PREALLOC | FS_XFLAG_HASATTR)
+
+/* Flags to indicate valid value of fsx_ fields */
+#define FS_XFLAG_VALUES_MASK \
+	(FS_XFLAG_EXTSIZE | FS_XFLAG_COWEXTSIZE)
+
+/* Flags for directories */
+#define FS_XFLAG_DIRONLY_MASK \
+	(FS_XFLAG_RTINHERIT | FS_XFLAG_NOSYMLINKS | FS_XFLAG_EXTSZINHERIT)
+
+/* Misc settable flags */
+#define FS_XFLAG_MISC_MASK \
+	(FS_XFLAG_REALTIME | FS_XFLAG_NODEFRAG | FS_XFLAG_FILESTREAM)
+
+#define FS_XFLAGS_MASK \
+	(FS_XFLAG_COMMON | FS_XFLAG_RDONLY_MASK | FS_XFLAG_VALUES_MASK | \
+	 FS_XFLAG_DIRONLY_MASK | FS_XFLAG_MISC_MASK)
+
+/*
+ * Merged interface for miscellaneous file attributes.  'flags' originates from
+ * ext* and 'fsx_flags' from xfs.  There's some overlap between the two, which
+ * is handled by the VFS helpers, so filesystems are free to implement just one
+ * or both of these sub-interfaces.
+ */
+struct file_kattr {
+	u32	flags;		/* flags (FS_IOC_GETFLAGS/FS_IOC_SETFLAGS) */
+	/* struct fsxattr: */
+	u32	fsx_xflags;	/* xflags field value (get/set) */
+	u32	fsx_extsize;	/* extsize field value (get/set)*/
+	u32	fsx_nextents;	/* nextents field value (get)	*/
+	u32	fsx_projid;	/* project identifier (get/set) */
+	u32	fsx_cowextsize;	/* CoW extsize field value (get/set)*/
+	/* selectors: */
+	bool	flags_valid:1;
+	bool	fsx_valid:1;
+};
+
+int copy_fsxattr_to_user(const struct file_kattr *fa, struct fsxattr __user *ufa);
+
+void fileattr_fill_xflags(struct file_kattr *fa, u32 xflags);
+void fileattr_fill_flags(struct file_kattr *fa, u32 flags);
+
+/**
+ * fileattr_has_fsx - check for extended flags/attributes
+ * @fa:		fileattr pointer
+ *
+ * Return: true if any attributes are present that are not represented in
+ * ->flags.
+ */
+static inline bool fileattr_has_fsx(const struct file_kattr *fa)
+{
+	return fa->fsx_valid &&
+		((fa->fsx_xflags & ~FS_XFLAG_COMMON) || fa->fsx_extsize != 0 ||
+		 fa->fsx_projid != 0 ||	fa->fsx_cowextsize != 0);
+}
+
+int vfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa);
+int vfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry,
+		     struct file_kattr *fa);
+int ioctl_getflags(struct file *file, unsigned int __user *argp);
+int ioctl_setflags(struct file *file, unsigned int __user *argp);
+int ioctl_fsgetxattr(struct file *file, void __user *argp);
+int ioctl_fssetxattr(struct file *file, void __user *argp);
+
+#endif /* _LINUX_FILEATTR_H */