static void scsi_disk_emulate_write_same(SCSIDiskReq *r, uint8_t *inbuf) { SCSIRequest *req = &r->req; SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, req->dev); uint32_t nb_sectors = scsi_data_cdb_length(r->req.cmd.buf); WriteSameCBData *data; uint8_t *buf; int i; /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */ if (nb_sectors == 0 || (req->cmd.buf[1] & 0x16)) { scsi_check_condition(r, SENSE_CODE(INVALID_FIELD)); return; } if (bdrv_is_read_only(s->qdev.conf.bs)) { scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED)); return; } if (!check_lba_range(s, r->req.cmd.lba, nb_sectors)) { scsi_check_condition(r, SENSE_CODE(LBA_OUT_OF_RANGE)); return; } if (buffer_is_zero(inbuf, s->qdev.blocksize)) { int flags = (req->cmd.buf[1] & 0x8) ? BDRV_REQ_MAY_UNMAP : 0; /* The request is used as the AIO opaque value, so add a ref. */ scsi_req_ref(&r->req); block_acct_start(bdrv_get_stats(s->qdev.conf.bs), &r->acct, nb_sectors * s->qdev.blocksize, BLOCK_ACCT_WRITE); r->req.aiocb = bdrv_aio_write_zeroes(s->qdev.conf.bs, r->req.cmd.lba * (s->qdev.blocksize / 512), nb_sectors * (s->qdev.blocksize / 512), flags, scsi_aio_complete, r); return; } data = g_new0(WriteSameCBData, 1); data->r = r; data->sector = r->req.cmd.lba * (s->qdev.blocksize / 512); data->nb_sectors = nb_sectors * (s->qdev.blocksize / 512); data->iov.iov_len = MIN(data->nb_sectors * 512, SCSI_WRITE_SAME_MAX); data->iov.iov_base = buf = qemu_blockalign(s->qdev.conf.bs, data->iov.iov_len); qemu_iovec_init_external(&data->qiov, &data->iov, 1); for (i = 0; i < data->iov.iov_len; i += s->qdev.blocksize) { memcpy(&buf[i], inbuf, s->qdev.blocksize); } scsi_req_ref(&r->req); block_acct_start(bdrv_get_stats(s->qdev.conf.bs), &r->acct, data->iov.iov_len, BLOCK_ACCT_WRITE); r->req.aiocb = bdrv_aio_writev(s->qdev.conf.bs, data->sector, &data->qiov, data->iov.iov_len / 512, scsi_write_same_complete, data); }