qemu-kvm/kvm-scsi-disk-Don-t-use-empty-string-as-device-id.patch
Danilo C. L. de Paula 1cbaf605ab * Fri Feb 08 2019 Danilo Cesar Lemes de Paula <ddepaula@redhat.com> - 3.1.0-13.el8
- kvm-io-ensure-UNIX-client-doesn-t-unlink-server-socket.patch [bz#1665896]
- kvm-scsi-disk-Don-t-use-empty-string-as-device-id.patch [bz#1668248]
- kvm-scsi-disk-Add-device_id-property.patch [bz#1668248]
- Resolves: bz#1665896
  (VNC unix listener socket is deleted after first client quits)
- Resolves: bz#1668248
  ("An unknown error has occurred" when using cdrom to install the system with two blockdev disks.(when choose installation destination))
2019-02-08 12:20:21 +00:00

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2.9 KiB
Diff

From 18d600a76319abe59dc4b5e371e5807c089f9159 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 6 Feb 2019 15:58:28 +0000
Subject: [PATCH 2/3] scsi-disk: Don't use empty string as device id
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <20190206155829.14641-2-kwolf@redhat.com>
Patchwork-id: 84253
O-Subject: [RHEL-7.7/8.0-AV qemu-kvm-rhev PATCH 1/2] scsi-disk: Don't use empty string as device id
Bugzilla: 1668248
RH-Acked-by: Max Reitz <mreitz@redhat.com>
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
scsi-disk includes in the Device Identification VPD page, depending on
configuration amongst others, a vendor specific designator that consists
either of the serial number if given or the BlockBackend name (which is
a host detail that better shouldn't have been leaked to the guest, but
now we have to maintain it for compatibility).
With anonymous BlockBackends, i.e. scsi-disk devices constructed with
drive=<node-name>, and no serial number explicitly specified, this ends
up as an empty string. If this happens to more than one disk, we have
accidentally signalled to the OS that this is a multipath setup, which
is obviously not what was intended.
Instead of using an empty string for the vendor specific designator,
simply leave out that designator, which makes Linux detect such setups
as separate disks again.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
(cherry picked from commit a8f58afcdb86e266e06c9dc41a71605e570244c3)
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
hw/scsi/scsi-disk.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index 0e9027c..93eef40 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -652,12 +652,14 @@ static int scsi_disk_emulate_vpd_page(SCSIRequest *req, uint8_t *outbuf)
DPRINTF("Inquiry EVPD[Device identification] "
"buffer size %zd\n", req->cmd.xfer);
- outbuf[buflen++] = 0x2; /* ASCII */
- outbuf[buflen++] = 0; /* not officially assigned */
- outbuf[buflen++] = 0; /* reserved */
- outbuf[buflen++] = id_len; /* length of data following */
- memcpy(outbuf + buflen, str, id_len);
- buflen += id_len;
+ if (id_len) {
+ outbuf[buflen++] = 0x2; /* ASCII */
+ outbuf[buflen++] = 0; /* not officially assigned */
+ outbuf[buflen++] = 0; /* reserved */
+ outbuf[buflen++] = id_len; /* length of data following */
+ memcpy(outbuf + buflen, str, id_len);
+ buflen += id_len;
+ }
if (s->qdev.wwn) {
outbuf[buflen++] = 0x1; /* Binary */
--
1.8.3.1