conf: remove parse code for long-extinct "<state devaddr='d🅱️s'/>

Back in July 2009, in the days before libvirt supported explicitly
assigning a PCI address to every device, code was added to save the
PCI addresses of hotplugged network, disk, and hostdevs in the domain
status with this XML element:

   <state devaddr='domain🚌slot'/>

This was added in commits 4e21a95a, 01654107, in v0.7.0, and 0c5b7b93
in v0.7.1.

Then just a few months later, in November 2009, The code that actually
formatted the "devaddr='blah'" into the status XML was removed by
commit 1b0cce7d3 (which "introduced a standardized data structure for
device addresses"). The code to *parse* the devaddr from the status
was left in for backward compatibility though (it just parses it into
the "standard" PCI address).

At the time the devaddr attribute was added, a few other attributes
already existed in the <state> element for network devices, and these
were removed over time (I haven't checked the exact dates of this),
but 10 years later, in libvirt v5.8.0, we *still* maintain code to
parse <state devaddr='blah'/> from the domain status.

In the meantime, even distros so old that we no longer support them in
upstream libvirt are using a libvirt new enough that it doesn't ever
write <state devaddr='blah'/> to the domain status XML.

Since the only way a current libvirt would ever encounter this element
would be if someone was upgrading directly from libvirt <= v0.7.5 with
running guests, it seems safe to finally remove the code that parses it.

Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/conf/domain_conf.c

@@ -7560,24 +7560,6 @@ virDomainDeviceInfoParseXML(virDomainXMLOptionPtr xmlopt G_GNUC_UNUSED,
     return ret;
 }
 
-static int
-virDomainParseLegacyDeviceAddress(char *devaddr,
-                                  virPCIDeviceAddressPtr pci)
-{
-    char *tmp;
-
-    /* expected format: <domain>:<bus>:<slot> */
-    if (/* domain */
-        virStrToLong_ui(devaddr, &tmp, 16, &pci->domain) < 0 || *tmp != ':' ||
-        /* bus */
-        virStrToLong_ui(tmp + 1, &tmp, 16, &pci->bus) < 0 || *tmp != ':' ||
-        /* slot */
-        virStrToLong_ui(tmp + 1, NULL, 16, &pci->slot) < 0)
-        return -1;
-
-    return 0;
-}
-
 static int
 virDomainHostdevSubsysUSBDefParseXML(xmlNodePtr node,
                                      virDomainHostdevDefPtr def)
@@ -7760,19 +7742,6 @@ virDomainHostdevSubsysPCIDefParseXML(xmlNodePtr node,
 
                 if (virPCIDeviceAddressParseXML(cur, addr) < 0)
                     goto out;
-            } else if ((flags & VIR_DOMAIN_DEF_PARSE_STATUS) &&
-                       virXMLNodeNameEqual(cur, "state")) {
-                /* Legacy back-compat. Don't add any more attributes here */
-                g_autofree char *devaddr = virXMLPropString(cur, "devaddr");
-                if (devaddr &&
-                    virDomainParseLegacyDeviceAddress(devaddr,
-                                                      &def->info->addr.pci) < 0) {
-                    virReportError(VIR_ERR_INTERNAL_ERROR,
-                                   _("Unable to parse devaddr parameter '%s'"),
-                                   devaddr);
-                    goto out;
-                }
-                def->info->type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
             } else if ((flags & VIR_DOMAIN_DEF_PARSE_PCI_ORIG_STATES) &&
                        virXMLNodeNameEqual(cur, "origstates")) {
                 virDomainHostdevOrigStatesPtr states = &def->origstates;
@@ -9961,7 +9930,6 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
     g_autofree char *sgio = NULL;
     g_autofree char *target = NULL;
     g_autofree char *bus = NULL;
-    g_autofree char *devaddr = NULL;
     g_autofree char *serial = NULL;
     g_autofree char *startupPolicy = NULL;
     g_autofree char *tray = NULL;
@@ -10128,10 +10096,6 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
             def->src->shared = true;
         } else if (virXMLNodeNameEqual(cur, "transient")) {
             def->transient = true;
-        } else if ((flags & VIR_DOMAIN_DEF_PARSE_STATUS) &&
-                   virXMLNodeNameEqual(cur, "state")) {
-            /* Legacy back-compat. Don't add any more attributes here */
-            devaddr = virXMLPropString(cur, "devaddr");
         } else if (!encryption &&
                    virXMLNodeNameEqual(cur, "encryption")) {
             /* If we've already parsed <source> and found an <encryption> child,
@@ -10316,19 +10280,9 @@ virDomainDiskDefParseXML(virDomainXMLOptionPtr xmlopt,
         }
     }
 
-    if (devaddr) {
+    if (virDomainDeviceInfoParseXML(xmlopt, node, &def->info,
-        if (virDomainParseLegacyDeviceAddress(devaddr,
+                                    flags | VIR_DOMAIN_DEF_PARSE_ALLOW_BOOT) < 0) {
-                                              &def->info.addr.pci) < 0) {
+        goto error;
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           _("Unable to parse devaddr parameter '%s'"),
-                           devaddr);
-            goto error;
-        }
-        def->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
-    } else {
-        if (virDomainDeviceInfoParseXML(xmlopt, node, &def->info,
-                                        flags | VIR_DOMAIN_DEF_PARSE_ALLOW_BOOT) < 0)
-            goto error;
     }
 
     if (startupPolicy) {
@@ -11490,7 +11444,6 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
     g_autofree char *str = NULL;
     g_autofree char *filter = NULL;
     g_autofree char *internal = NULL;
-    g_autofree char *devaddr = NULL;
     g_autofree char *mode = NULL;
     g_autofree char *linkstate = NULL;
     g_autofree char *addrtype = NULL;
@@ -11671,10 +11624,6 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
                 filter = virXMLPropString(cur, "filter");
                 virHashFree(filterparams);
                 filterparams = virNWFilterParseParamAttributes(cur);
-            } else if ((flags & VIR_DOMAIN_DEF_PARSE_STATUS) &&
-                       virXMLNodeNameEqual(cur, "state")) {
-                /* Legacy back-compat. Don't add any more attributes here */
-                devaddr = virXMLPropString(cur, "devaddr");
             } else if (virXMLNodeNameEqual(cur, "boot")) {
                 /* boot is parsed as part of virDomainDeviceInfoParseXML */
             } else if (!actual &&
@@ -11727,20 +11676,10 @@ virDomainNetDefParseXML(virDomainXMLOptionPtr xmlopt,
         def->mac_generated = true;
     }
 
-    if (devaddr) {
+    if (virDomainDeviceInfoParseXML(xmlopt, node, &def->info,
-        if (virDomainParseLegacyDeviceAddress(devaddr,
+                                    flags | VIR_DOMAIN_DEF_PARSE_ALLOW_BOOT
-                                              &def->info.addr.pci) < 0) {
+                                    | VIR_DOMAIN_DEF_PARSE_ALLOW_ROM) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
+        goto error;
-                           _("Unable to parse devaddr parameter '%s'"),
-                           devaddr);
-            goto error;
-        }
-        def->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
-    } else {
-        if (virDomainDeviceInfoParseXML(xmlopt, node, &def->info,
-                                        flags | VIR_DOMAIN_DEF_PARSE_ALLOW_BOOT
-                                        | VIR_DOMAIN_DEF_PARSE_ALLOW_ROM) < 0)
-            goto error;
     }
 
     if (model != NULL &&