diff --git a/libc/kernel/uapi/linux/fs.h b/libc/kernel/uapi/linux/fs.h
index f1a8eac..38a2d9e 100644
--- a/libc/kernel/uapi/linux/fs.h
+++ b/libc/kernel/uapi/linux/fs.h
@@ -36,6 +36,14 @@
   __u64 len;
   __u64 minlen;
 };
+struct fsuuid2 {
+  __u8 len;
+  __u8 uuid[16];
+};
+struct fs_sysfs_path {
+  __u8 len;
+  __u8 name[128];
+};
 #define FILE_DEDUPE_RANGE_SAME 0
 #define FILE_DEDUPE_RANGE_DIFFERS 1
 struct file_dedupe_range_info {
@@ -141,6 +149,8 @@
 #define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr)
 #define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX])
 #define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX])
+#define FS_IOC_GETFSUUID _IOR(0x15, 0, struct fsuuid2)
+#define FS_IOC_GETFSSYSFSPATH _IOR(0x15, 1, struct fs_sysfs_path)
 #define FS_SECRM_FL 0x00000001
 #define FS_UNRM_FL 0x00000002
 #define FS_COMPR_FL 0x00000004
@@ -183,7 +193,8 @@
 #define RWF_SYNC (( __kernel_rwf_t) 0x00000004)
 #define RWF_NOWAIT (( __kernel_rwf_t) 0x00000008)
 #define RWF_APPEND (( __kernel_rwf_t) 0x00000010)
-#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT | RWF_APPEND)
+#define RWF_NOAPPEND (( __kernel_rwf_t) 0x00000020)
+#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT | RWF_APPEND | RWF_NOAPPEND)
 #define PAGEMAP_SCAN _IOWR('f', 16, struct pm_scan_arg)
 #define PAGE_IS_WPALLOWED (1 << 0)
 #define PAGE_IS_WRITTEN (1 << 1)