Re: [Qemu-devel] [PATCH 1/8] iscsi: add logical block provisioning information to iscsilun

[Paolo Bonzini <pbonzini@redhat.com>]

Il 22/06/2013 22:58, Peter Lieven ha scritto:
> Signed-off-by: Peter Lieven <pl@kamp.de>
> ---
>  block/iscsi.c |   47 +++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 47 insertions(+)
> 
> diff --git a/block/iscsi.c b/block/iscsi.c
> index 0bbf0b1..a38a1bf 100644
> --- a/block/iscsi.c
> +++ b/block/iscsi.c
> @@ -49,6 +49,11 @@ typedef struct IscsiLun {
>      uint64_t num_blocks;
>      int events;
>      QEMUTimer *nop_timer;
> +    uint8_t lbpme;
> +    uint8_t lbprz;
> +    uint8_t lbpu;
> +    uint8_t lbpws;
> +    uint8_t lbpws10;
>  } IscsiLun;
>  
>  typedef struct IscsiAIOCB {
> @@ -948,6 +953,8 @@ static int iscsi_readcapacity_sync(IscsiLun *iscsilun)
>                  } else {
>                      iscsilun->block_size = rc16->block_length;
>                      iscsilun->num_blocks = rc16->returned_lba + 1;
> +                    iscsilun->lbpme = rc16->lbpme;
> +                    iscsilun->lbprz = rc16->lbprz;
>                  }
>              }
>              break;
> @@ -1130,6 +1137,46 @@ static int iscsi_open(BlockDriverState *bs, QDict *options, int flags)
>          bs->sg = 1;
>      }
>  
> +    if (iscsilun->lbpme) {
> +        struct scsi_inquiry_logical_block_provisioning *inq_lbp;
> +        int full_size;
> +
> +        task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 1,
> +                                  SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING,
> +                                  64);
> +        if (task == NULL || task->status != SCSI_STATUS_GOOD) {
> +            error_report("iSCSI: Inquiry command failed : %s",
> +                   iscsi_get_error(iscsilun->iscsi));
> +            ret = -EINVAL;
> +            goto out;
> +        }
> +        full_size = scsi_datain_getfullsize(task);
> +        if (full_size > task->datain.size) {
> +            scsi_free_scsi_task(task);
> +
> +            /* we need more data for the full list */
> +            task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 1,
> +                                      SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING,
> +                                      full_size);
> +            if (task == NULL || task->status != SCSI_STATUS_GOOD) {
> +                error_report("iSCSI: Inquiry command failed : %s",
> +                             iscsi_get_error(iscsilun->iscsi));
> +                ret = -EINVAL;
> +                goto out;
> +            }
> +        }
> +
> +        inq_lbp = scsi_datain_unmarshall(task);
> +        if (inq_lbp == NULL) {
> +            error_report("iSCSI: failed to unmarshall inquiry datain blob");
> +            ret = -EINVAL;
> +            goto out;
> +        }
> +        iscsilun->lbpu = inq_lbp->lbpu;
> +        iscsilun->lbpws = inq_lbp->lbpws;
> +        iscsilun->lbpws10 = inq_lbp->lbpws10;
> +    }
> +
>  #if defined(LIBISCSI_FEATURE_NOP_COUNTER)
>      /* Set up a timer for sending out iSCSI NOPs */
>      iscsilun->nop_timer = qemu_new_timer_ms(rt_clock, iscsi_nop_timed_event, iscsilun);
> 

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>