2 Apr
2014
2 Apr
'14
12:41 p.m.
> if (bp->b_blkno + pi->p_offset
<= LABELSECTOR &&
> bp->b_blkno + pi->p_offset + sz > LABELSECTOR &&
> !(bp->b_flags & B_READ) && !(dk->dk_flags &
DKF_WLABEL))
So how do you write a label? Some ioctl?
Most likely. But for your purposes it is probably enough to just turn
on DKF_WLABEL, probably just another ioctl. At least, based on
BSD-derived code I have at ready hand (which uses DIOCSDINFO to write
the label and DIOCWLABEL to enable or disable what the above quote
calls DKF_WLABEL).
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