LINUX_F_SPECIFIC_BASE
#define LINUX_F_SETLEASE (LINUX_F_SPECIFIC_BASE + 0)
#define LINUX_F_GETLEASE (LINUX_F_SPECIFIC_BASE + 1)
#define LINUX_F_NOTIFY (LINUX_F_SPECIFIC_BASE + 2)
#define LINUX_F_CANCELLK (LINUX_F_SPECIFIC_BASE + 5)
#define LINUX_F_DUPFD_CLOEXEC (LINUX_F_SPECIFIC_BASE + 6)
#define LINUX_F_SETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 7)
#define LINUX_F_GETPIPE_SZ (LINUX_F_SPECIFIC_BASE + 8)
#define LINUX_F_ADD_SEALS (LINUX_F_SPECIFIC_BASE + 9)
#define LINUX_F_GET_SEALS (LINUX_F_SPECIFIC_BASE + 10)