diff options
Diffstat (limited to 'block/nbd.c')
| -rw-r--r-- | block/nbd.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/block/nbd.c b/block/nbd.c index 4a9048c280..a50d24b50a 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -472,9 +472,17 @@ static int nbd_co_flush(BlockDriverState *bs) static void nbd_refresh_limits(BlockDriverState *bs, Error **errp) { - bs->bl.max_pdiscard = NBD_MAX_BUFFER_SIZE; - bs->bl.max_pwrite_zeroes = NBD_MAX_BUFFER_SIZE; - bs->bl.max_transfer = NBD_MAX_BUFFER_SIZE; + NBDClientSession *s = nbd_get_client_session(bs); + uint32_t max = MIN_NON_ZERO(NBD_MAX_BUFFER_SIZE, s->info.max_block); + + bs->bl.max_pdiscard = max; + bs->bl.max_pwrite_zeroes = max; + bs->bl.max_transfer = max; + + if (s->info.opt_block && + s->info.opt_block > bs->bl.opt_transfer) { + bs->bl.opt_transfer = s->info.opt_block; + } } static void nbd_close(BlockDriverState *bs) |