OPT_BOOL(), \
BCH2_NO_SB_OPT, false, \
NULL, "Don't open device in exclusive mode") \
+ x(direct_io, u8, \
+ OPT_FS|OPT_MOUNT, \
+ OPT_BOOL(), \
+ BCH2_NO_SB_OPT, true, \
+ NULL, "Use O_DIRECT (userspace only)") \
x(sb, u64, \
OPT_MOUNT, \
OPT_UINT(0, S64_MAX), \