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scsi-disk: fix VERIFY for scsi-block 

When a scsi-disk object receives VERIFY command with BYTCHK bit being zero,
scsi_block_is_passthrough returns false and finally makes req being proceeded
by scsi_block_dma_command. Because scsi_block_dma_command has removed process
of VERIFY, QEMU will abort in this function.

Reported-by: Junlian Bell <zhongjun@sangfor.com.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-12-16 11:10:28 +01:00
parent 8929fc3a55
commit 166dbda7e1
1 changed files with 8 additions and 1 deletions
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9
hw/scsi/scsi-disk.c
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@ -2157,6 +2157,13 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
DPRINTF("Write %s(sector %" PRId64 ", count %u)\n",
(command & 0xe) == 0xe ? "And Verify " : "",
r->req.cmd.lba, len);
case VERIFY_10:
case VERIFY_12:
case VERIFY_16:
/* We get here only for BYTCHK == 0x01 and only for scsi-block.
* As far as DMA is concerned, we can treat it the same as a write;
* scsi_block_do_sgio will send VERIFY commands.
*/
if (r->req.cmd.buf[1] & 0xe0) {
goto illegal_request;
}
@ -2712,7 +2719,7 @@ static bool scsi_block_is_passthrough(SCSIDiskState *s, uint8_t *buf)
case WRITE_VERIFY_16:
/* MMC writing cannot be done via DMA helpers, because it sometimes
* involves writing beyond the maximum LBA or to negative LBA (lead-in).
* We might use scsi_disk_dma_reqops as long as no writing commands are
* We might use scsi_block_dma_reqops as long as no writing commands are
* seen, but performance usually isn't paramount on optical media. So,
* just make scsi-block operate the same as scsi-generic for them.
*/