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scsi-block: extract scsi_block_is_passthrough
This will be used for both scsi_block_new_request and the scsi-block implementation of parse_cdb. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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ff34c32ccc
commit
592c3b289f
@ -2501,12 +2501,8 @@ static int scsi_block_initfn(SCSIDevice *dev)
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return scsi_initfn(&s->qdev);
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}
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static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
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uint32_t lun, uint8_t *buf,
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void *hba_private)
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static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
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switch (buf[0]) {
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case READ_6:
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case READ_10:
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@ -2523,9 +2519,9 @@ static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
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case WRITE_VERIFY_12:
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case WRITE_VERIFY_16:
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/* If we are not using O_DIRECT, we might read stale data from the
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* host cache if writes were made using other commands than these
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* ones (such as WRITE SAME or EXTENDED COPY, etc.). So, without
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* O_DIRECT everything must go through SG_IO.
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* host cache if writes were made using other commands than these
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* ones (such as WRITE SAME or EXTENDED COPY, etc.). So, without
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* O_DIRECT everything must go through SG_IO.
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*/
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if (!(bdrv_get_flags(s->qdev.conf.bs) & BDRV_O_NOCACHE)) {
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break;
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@ -2542,13 +2538,31 @@ static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
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* just make scsi-block operate the same as scsi-generic for them.
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*/
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if (s->qdev.type != TYPE_ROM) {
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return scsi_req_alloc(&scsi_disk_dma_reqops, &s->qdev, tag, lun,
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hba_private);
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return false;
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}
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break;
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default:
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break;
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}
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return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun,
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hba_private);
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return true;
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}
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static SCSIRequest *scsi_block_new_request(SCSIDevice *d, uint32_t tag,
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uint32_t lun, uint8_t *buf,
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void *hba_private)
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{
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SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, d);
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if (scsi_block_is_passthrough(s, buf)) {
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return scsi_req_alloc(&scsi_generic_req_ops, &s->qdev, tag, lun,
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hba_private);
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} else {
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return scsi_req_alloc(&scsi_disk_dma_reqops, &s->qdev, tag, lun,
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hba_private);
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}
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}
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#endif
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