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From e110f0eee587fbfc75409e0980f25275dd8551de Mon Sep 17 00:00:00 2001
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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Mon, 20 Jan 2014 12:49:45 +0100
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Subject: [PATCH 29/34] scsi-disk: fix VERIFY emulation
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: <1390222185-24969-3-git-send-email-pbonzini@redhat.com>
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Patchwork-id: 56834
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O-Subject: [RHEL 7.0 qemu-kvm PATCH 2/2] scsi-disk: fix VERIFY emulation
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Bugzilla: 1035644
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Laszlo Ersek <lersek@redhat.com>
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RH-Acked-by: Orit Wasserman <owasserm@redhat.com>
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VERIFY emulation was completely botched (and remained botched through
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all the refactorings). The command must be emulated both in check-medium
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mode (BYTCHK=00, which we implement by doing nothing) and in check-bytes
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mode (which we do not implement yet). Unlike WRITE AND VERIFY (which we
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treat simply as WRITE with FUA bit set), VERIFY cannot be handled like
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READ. In fact the device is _receiving_ data for VERIFY, not _sending_
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it like READ.
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Cc: qemu-stable@nongnu.org
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Tested-by: Hervé Poussineau <hpoussin@reactos.org>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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(cherry picked from commit d97e7730816094a71cd1f19a56d7a73f77cdbf96)
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---
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hw/scsi/scsi-disk.c | 27 ++++++++++++++++++++-------
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1 file changed, 20 insertions(+), 7 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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hw/scsi/scsi-disk.c | 27 ++++++++++++++++++++-------
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1 files changed, 20 insertions(+), 7 deletions(-)
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diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
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index c44f159..7653411 100644
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--- a/hw/scsi/scsi-disk.c
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+++ b/hw/scsi/scsi-disk.c
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@@ -1720,10 +1720,19 @@ static void scsi_disk_emulate_write_data(SCSIRequest *req)
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scsi_disk_emulate_unmap(r, r->iov.iov_base);
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break;
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+ case VERIFY_10:
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+ case VERIFY_12:
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+ case VERIFY_16:
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+ if (r->req.status == -1) {
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+ scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
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+ }
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+ break;
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+
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case WRITE_SAME_10:
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case WRITE_SAME_16:
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scsi_disk_emulate_write_same(r, r->iov.iov_base);
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break;
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+
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default:
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abort();
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}
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@@ -1964,6 +1973,14 @@ static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
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case UNMAP:
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DPRINTF("Unmap (len %lu)\n", (long)r->req.cmd.xfer);
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break;
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+ case VERIFY_10:
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+ case VERIFY_12:
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+ case VERIFY_16:
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+ DPRINTF("Verify (bytchk %lu)\n", (r->req.buf[1] >> 1) & 3);
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+ if (req->cmd.buf[1] & 6) {
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+ goto illegal_request;
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+ }
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+ break;
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case WRITE_SAME_10:
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case WRITE_SAME_16:
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DPRINTF("WRITE SAME %d (len %lu)\n",
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@@ -2044,10 +2061,6 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
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scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
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return 0;
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}
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- /* fallthrough */
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- case VERIFY_10:
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- case VERIFY_12:
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- case VERIFY_16:
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DPRINTF("Write %s(sector %" PRId64 ", count %u)\n",
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(command & 0xe) == 0xe ? "And Verify " : "",
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r->req.cmd.lba, len);
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@@ -2315,14 +2328,14 @@ static const SCSIReqOps *const scsi_disk_reqops_dispatch[256] = {
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[UNMAP] = &scsi_disk_emulate_reqops,
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[WRITE_SAME_10] = &scsi_disk_emulate_reqops,
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[WRITE_SAME_16] = &scsi_disk_emulate_reqops,
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+ [VERIFY_10] = &scsi_disk_emulate_reqops,
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+ [VERIFY_12] = &scsi_disk_emulate_reqops,
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+ [VERIFY_16] = &scsi_disk_emulate_reqops,
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[READ_6] = &scsi_disk_dma_reqops,
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[READ_10] = &scsi_disk_dma_reqops,
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[READ_12] = &scsi_disk_dma_reqops,
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[READ_16] = &scsi_disk_dma_reqops,
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- [VERIFY_10] = &scsi_disk_dma_reqops,
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- [VERIFY_12] = &scsi_disk_dma_reqops,
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- [VERIFY_16] = &scsi_disk_dma_reqops,
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[WRITE_6] = &scsi_disk_dma_reqops,
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[WRITE_10] = &scsi_disk_dma_reqops,
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[WRITE_12] = &scsi_disk_dma_reqops,
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--
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1.7.1
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