diff options
Diffstat (limited to 'nbd/server.c')
| -rw-r--r-- | nbd/server.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/nbd/server.c b/nbd/server.c index 4992148de1..28c3c8be85 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -1513,7 +1513,8 @@ NBDExport *nbd_export_new(BlockDriverState *bs, uint64_t dev_offset, exp->nbdflags |= NBD_FLAG_CAN_MULTI_CONN; } } else { - exp->nbdflags |= NBD_FLAG_SEND_TRIM | NBD_FLAG_SEND_WRITE_ZEROES; + exp->nbdflags |= (NBD_FLAG_SEND_TRIM | NBD_FLAG_SEND_WRITE_ZEROES | + NBD_FLAG_SEND_FAST_ZERO); } assert(size <= INT64_MAX - dev_offset); exp->size = QEMU_ALIGN_DOWN(size, BDRV_SECTOR_SIZE); @@ -2166,7 +2167,7 @@ static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request, if (request->type == NBD_CMD_READ && client->structured_reply) { valid_flags |= NBD_CMD_FLAG_DF; } else if (request->type == NBD_CMD_WRITE_ZEROES) { - valid_flags |= NBD_CMD_FLAG_NO_HOLE; + valid_flags |= NBD_CMD_FLAG_NO_HOLE | NBD_CMD_FLAG_FAST_ZERO; } else if (request->type == NBD_CMD_BLOCK_STATUS) { valid_flags |= NBD_CMD_FLAG_REQ_ONE; } @@ -2305,6 +2306,9 @@ static coroutine_fn int nbd_handle_request(NBDClient *client, if (!(request->flags & NBD_CMD_FLAG_NO_HOLE)) { flags |= BDRV_REQ_MAY_UNMAP; } + if (request->flags & NBD_CMD_FLAG_FAST_ZERO) { + flags |= BDRV_REQ_NO_FALLBACK; + } ret = blk_pwrite_zeroes(exp->blk, request->from + exp->dev_offset, request->len, flags); return nbd_send_generic_reply(client, request->handle, ret, |