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From b3bd3f499bcf2fa9b2d61b5291e0a50bc7e8e595 Mon Sep 17 00:00:00 2001
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Message-Id: <b3bd3f499bcf2fa9b2d61b5291e0a50bc7e8e595@dist-git>
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From: Jiri Denemark <jdenemar@redhat.com>
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Date: Thu, 22 Feb 2018 13:51:36 +0100
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Subject: [PATCH] qemu: Fix updating device with boot order
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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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Commit v3.7.0-14-gc57f3fd2f8 prevented adding a <boot order='x'/>
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element to an inactive domain with global <boot dev='...'/> element.
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However, as a result of that change updating any device with boot order
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would fail with 'boot order X is already used by another device', where
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"another device" is in fact the device which is being updated.
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To fix this we have to ignore the device which we're about to update
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when checking for boot order conflicts.
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https://bugzilla.redhat.com/show_bug.cgi?id=1546971
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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(cherry picked from commit edae027cfe02be4863dcef1e7f0ea0564766e312)
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https://bugzilla.redhat.com/show_bug.cgi?id=1557922
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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 src/conf/domain_conf.c | 29 ++++++++++++++++++++++-------
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 1 file changed, 22 insertions(+), 7 deletions(-)
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diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
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index e9bba70057..f21c776ccd 100644
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--- a/src/conf/domain_conf.c
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+++ b/src/conf/domain_conf.c
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@@ -27166,18 +27166,30 @@ virDomainDeviceIsUSB(virDomainDeviceDefPtr dev)
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     return false;
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 }
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+
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+typedef struct _virDomainCompatibleDeviceData virDomainCompatibleDeviceData;
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+typedef virDomainCompatibleDeviceData *virDomainCompatibleDeviceDataPtr;
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+struct _virDomainCompatibleDeviceData {
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+    virDomainDeviceInfoPtr newInfo;
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+    virDomainDeviceInfoPtr oldInfo;
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+};
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+
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 static int
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 virDomainDeviceInfoCheckBootIndex(virDomainDefPtr def ATTRIBUTE_UNUSED,
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                                   virDomainDeviceDefPtr device ATTRIBUTE_UNUSED,
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                                   virDomainDeviceInfoPtr info,
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                                   void *opaque)
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 {
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-    virDomainDeviceInfoPtr newinfo = opaque;
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+    virDomainCompatibleDeviceDataPtr data = opaque;
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-    if (info->bootIndex == newinfo->bootIndex) {
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+    /* Ignore the device we're about to update */
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+    if (data->oldInfo == info)
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+        return 0;
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+
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+    if (info->bootIndex == data->newInfo->bootIndex) {
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         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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                        _("boot order %u is already used by another device"),
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-                       newinfo->bootIndex);
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+                       data->newInfo->bootIndex);
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         return -1;
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     }
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     return 0;
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@@ -27186,9 +27198,12 @@ virDomainDeviceInfoCheckBootIndex(virDomainDefPtr def ATTRIBUTE_UNUSED,
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 int
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 virDomainDefCompatibleDevice(virDomainDefPtr def,
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                              virDomainDeviceDefPtr dev,
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-                             virDomainDeviceDefPtr oldDev ATTRIBUTE_UNUSED)
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+                             virDomainDeviceDefPtr oldDev)
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 {
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-    virDomainDeviceInfoPtr info = virDomainDeviceGetInfo(dev);
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+    virDomainCompatibleDeviceData data = {
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+        .newInfo = virDomainDeviceGetInfo(dev),
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+        .oldInfo = virDomainDeviceGetInfo(oldDev),
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+    };
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     if (!virDomainDefHasUSB(def) &&
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         def->os.type != VIR_DOMAIN_OSTYPE_EXE &&
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@@ -27199,7 +27214,7 @@ virDomainDefCompatibleDevice(virDomainDefPtr def,
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         return -1;
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     }
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-    if (info && info->bootIndex > 0) {
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+    if (data.newInfo && data.newInfo->bootIndex > 0) {
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         if (def->os.nBootDevs > 0) {
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             virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
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                            _("per-device boot elements cannot be used"
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@@ -27208,7 +27223,7 @@ virDomainDefCompatibleDevice(virDomainDefPtr def,
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         }
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         if (virDomainDeviceInfoIterate(def,
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                                        virDomainDeviceInfoCheckBootIndex,
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-                                       info) < 0)
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+                                       &data) < 0)
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             return -1;
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     }
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-- 
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2.17.0
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