FS_DN_MULTISHOT
if (dn->dn_mask & FS_DN_MULTISHOT)
new_mask |= FS_DN_MULTISHOT;
new_mask |= (dn->dn_mask & ~FS_DN_MULTISHOT);
#define ALL_FSNOTIFY_FLAGS (FS_ISDIR | FS_EVENT_ON_CHILD | FS_DN_MULTISHOT)