[PATCH 4/9] qemu_hotplug: Don't validate inaccessible fields in qemuDomainChangeMemoryLiveValidateChange()

[Michal Privoznik]

The qemuDomainChangeMemoryLiveValidateChange() function is called
when a live memory device change is requested (via
virDomainUpdateDeviceFlags()). Currently, the only model that is
allowed to change is VIRTIO_MEM (and the only value that's
allowed to change is requestedsize). The aim of the function is
to check whether the change user requested follows this rule. And
in accordance with defensive programming I made the function
check all virDomainMemoryDef struct members. Even those which are
unused for VIRTIO_MEM model.

Drop these checks as the respective members will be inaccessible
soon (as the struct is refined).

Signed-off-by: Michal Privoznik <mpriv...@redhat.com>
---
 src/qemu/qemu_hotplug.c | 41 -----------------------------------------
 1 file changed, 41 deletions(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 03a50191ef..e5f587ba65 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -7037,28 +7037,6 @@ qemuDomainChangeMemoryLiveValidateChange(const 
virDomainMemoryDef *oldDef,
         return false;
     }
 
-    if (STRNEQ_NULLABLE(oldDef->nvdimmPath, newDef->nvdimmPath)) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       _("cannot modify memory path from '%1$s' to '%2$s'"),
-                       NULLSTR(oldDef->nvdimmPath),
-                       NULLSTR(newDef->nvdimmPath));
-        return false;
-    }
-
-    if (oldDef->alignsize != newDef->alignsize) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       _("cannot modify memory align size from '%1$llu' to 
'%2$llu'"),
-                       oldDef->alignsize, newDef->alignsize);
-        return false;
-    }
-
-    if (oldDef->nvdimmPmem != newDef->nvdimmPmem) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       _("cannot modify memory pmem from '%1$d' to '%2$d'"),
-                       oldDef->nvdimmPmem, newDef->nvdimmPmem);
-        return false;
-    }
-
     if (oldDef->targetNode != newDef->targetNode) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("cannot modify memory targetNode from '%1$d' to 
'%2$d'"),
@@ -7073,12 +7051,6 @@ qemuDomainChangeMemoryLiveValidateChange(const 
virDomainMemoryDef *oldDef,
         return false;
     }
 
-    if (oldDef->labelsize != newDef->labelsize) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-                       _("cannot modify memory label size from '%1$llu' to 
'%2$llu'"),
-                       oldDef->labelsize, newDef->labelsize);
-        return false;
-    }
     if (oldDef->blocksize != newDef->blocksize) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                        _("cannot modify memory block size from '%1$llu' to 
'%2$llu'"),
@@ -7088,19 +7060,6 @@ qemuDomainChangeMemoryLiveValidateChange(const 
virDomainMemoryDef *oldDef,
 
     /* requestedsize can change */
 
-    if (oldDef->readonly != newDef->readonly) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                       _("cannot modify memory pmem flag"));
-        return false;
-    }
-
-    if ((oldDef->uuid || newDef->uuid) &&
-        !(oldDef->uuid && newDef->uuid &&
-          memcmp(oldDef->uuid, newDef->uuid, VIR_UUID_BUFLEN) == 0)) {
-        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                       _("cannot modify memory UUID"));
-        return false;
-    }
 
     if (oldDef->address != newDef->address) {
         virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-- 
2.41.0