On Mon, Oct 17, 2016 at 04:29:40PM +0200, Tomasz Majchrzak wrote:
> Once external metadata handler acknowledges all bad blocks (by writing
> to rdev 'bad_blocks' sysfs file), it requests to unblock the array.
> Check if all bad blocks are actually acknowledged as there might be a
> race if new bad blocks are notified at the same time. If all bad blocks
> are acknowledged, just unblock the array and continue. If not, ignore
> the request to unblock (do not fail an array). External metadata handler
> is expected to either process remaining bad blocks and try to unblock
> again or remove bad block support for a disk (which will cause disk to
> fail as in no-support case).
>
> Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@xxxxxxxxx>
> Reviewed-by: Artur Paszkiewicz <artur.paszkiewicz@xxxxxxxxx>
> ---
> drivers/md/md.c | 43 ++++++++++++++++++++++++++++++++++++-------
> 1 file changed, 36 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/md/md.c b/drivers/md/md.c
> index f375d1b..81b4c33 100644
> --- a/drivers/md/md.c
> +++ b/drivers/md/md.c
> @@ -2629,19 +2629,48 @@ state_store(struct md_rdev *rdev, const char *buf, size_t len)
> set_bit(Blocked, &rdev->flags);
> err = 0;
> } else if (cmd_match(buf, "-blocked")) {
> - if (!test_bit(Faulty, &rdev->flags) &&
> + int unblock = 1;
> +
> + if ((test_bit(ExternalBbl, &rdev->flags) &&
> + rdev->badblocks.changed)) {
> + struct badblocks *bb = &rdev->badblocks;
> + int ack = 1;
> +
> + write_seqlock_irq(&bb->lock);
> + if (bb->unacked_exist) {
> + u64 *p = bb->page;
> + int i;
> +
> + for (i = 0; i < bb->count ; i++) {
> + if (!BB_ACK(p[i])) {
> + ack = 0;
> + break;
> + }
> + }
> + if (ack) {
> + bb->unacked_exist = 0;
> + bb->changed = 0;
> + }
> + }
> + write_sequnlock_irq(&bb->lock);
> + }
shouldn't this part be moved to badblocks.c?
Thanks,
Shaohua
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
