CIFS_UNIX_LARGE_WRITE_CAP
if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
else if (tcon->unix_ext && (unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))
if (!tcon->unix_ext || !(unix_cap & CIFS_UNIX_LARGE_WRITE_CAP))