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[libvirt PATCH v3 6/8] cpu: Wire in XML validation



This adds a new value to virConnectCompareCPUFlags,
"VIR_CONNECT_CPU_VALIDATE_XML", that governs XML document validation in
virCPUDefParseXML.

Signed-off-by: Tim Wiederhake <twiederh redhat com>
---
 include/libvirt/libvirt-host.h   |  2 ++
 src/bhyve/bhyve_driver.c         |  7 +++++--
 src/conf/cpu_conf.c              | 25 +++++++++++++++++++++----
 src/conf/cpu_conf.h              |  6 ++++--
 src/conf/domain_conf.c           |  3 ++-
 src/cpu/cpu.c                    |  5 +++--
 src/cpu/cpu.h                    |  3 ++-
 src/libxl/libxl_driver.c         |  7 +++++--
 src/qemu/qemu_domain.c           |  5 +++--
 src/qemu/qemu_driver.c           | 18 +++++++++++++-----
 src/qemu/qemu_migration_cookie.c |  3 ++-
 tests/cputest.c                  |  5 +++--
 12 files changed, 65 insertions(+), 24 deletions(-)

diff --git a/include/libvirt/libvirt-host.h b/include/libvirt/libvirt-host.h
index 6972834175..4caed94a77 100644
--- a/include/libvirt/libvirt-host.h
+++ b/include/libvirt/libvirt-host.h
@@ -754,6 +754,8 @@ typedef enum {
 typedef enum {
     VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE = (1 << 0), /* treat incompatible
                                                              CPUs as failure */
+    VIR_CONNECT_COMPARE_CPU_VALIDATE_XML = (1 << 1), /* validate the xml
+                                                        document */
 } virConnectCompareCPUFlags;
 
 int virConnectCompareCPU(virConnectPtr conn,
diff --git a/src/bhyve/bhyve_driver.c b/src/bhyve/bhyve_driver.c
index daa20bad40..7dce3f8648 100644
--- a/src/bhyve/bhyve_driver.c
+++ b/src/bhyve/bhyve_driver.c
@@ -1442,14 +1442,17 @@ bhyveConnectCompareCPU(virConnectPtr conn,
     int ret = VIR_CPU_COMPARE_ERROR;
     virCapsPtr caps = NULL;
     bool failIncompatible;
+    bool validateXML;
 
-    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE,
+    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE |
+                  VIR_CONNECT_COMPARE_CPU_VALIDATE_XML,
                   VIR_CPU_COMPARE_ERROR);
 
     if (virConnectCompareCPUEnsureACL(conn) < 0)
         goto cleanup;
 
     failIncompatible = !!(flags & VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE);
+    validateXML = !!(flags & VIR_CONNECT_COMPARE_CPU_VALIDATE_XML);
 
     if (!(caps = bhyveDriverGetCapabilities(driver)))
         goto cleanup;
@@ -1465,7 +1468,7 @@ bhyveConnectCompareCPU(virConnectPtr conn,
         }
     } else {
         ret = virCPUCompareXML(caps->host.arch, caps->host.cpu,
-                               xmlDesc, failIncompatible);
+                               xmlDesc, failIncompatible, validateXML);
     }
 
  cleanup:
diff --git a/src/conf/cpu_conf.c b/src/conf/cpu_conf.c
index dea950ce68..1910470836 100644
--- a/src/conf/cpu_conf.c
+++ b/src/conf/cpu_conf.c
@@ -20,9 +20,11 @@
 
 #include <config.h>
 
+#include "configmake.h"
 #include "virerror.h"
 #include "viralloc.h"
 #include "virbuffer.h"
+#include "virfile.h"
 #include "cpu_conf.h"
 #include "domain_conf.h"
 #include "virstring.h"
@@ -281,7 +283,8 @@ virCPUDefCopy(const virCPUDef *cpu)
 int
 virCPUDefParseXMLString(const char *xml,
                         virCPUType type,
-                        virCPUDefPtr *cpu)
+                        virCPUDefPtr *cpu,
+                        bool validateXML)
 {
     xmlDocPtr doc = NULL;
     xmlXPathContextPtr ctxt = NULL;
@@ -295,7 +298,7 @@ virCPUDefParseXMLString(const char *xml,
     if (!(doc = virXMLParseStringCtxt(xml, _("(CPU_definition)"), &ctxt)))
         goto cleanup;
 
-    if (virCPUDefParseXML(ctxt, NULL, type, cpu) < 0)
+    if (virCPUDefParseXML(ctxt, NULL, type, cpu, validateXML) < 0)
         goto cleanup;
 
     ret = 0;
@@ -323,7 +326,8 @@ int
 virCPUDefParseXML(xmlXPathContextPtr ctxt,
                   const char *xpath,
                   virCPUType type,
-                  virCPUDefPtr *cpu)
+                  virCPUDefPtr *cpu,
+                  bool validateXML)
 {
     g_autoptr(virCPUDef) def = NULL;
     g_autofree xmlNodePtr *nodes = NULL;
@@ -348,6 +352,19 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
         return -1;
     }
 
+    if (validateXML) {
+        g_autofree char *schemafile = NULL;
+
+        if (!(schemafile = virFileFindResource("cpu.rng",
+                                               abs_top_srcdir "/docs/schemas",
+                                               PKGDATADIR "/schemas")))
+            return -1;
+
+        if (virXMLValidateNodeAgainstSchema(schemafile, ctxt->doc,
+                                            ctxt->node) < 0)
+            return -1;
+    }
+
     def = virCPUDefNew();
 
     if (type == VIR_CPU_TYPE_AUTO) {
@@ -1146,7 +1163,7 @@ virCPUDefListParse(const char **xmlCPUs,
         if (!(doc = virXMLParseStringCtxt(xmlCPUs[i], _("(CPU_definition)"), &ctxt)))
             goto error;
 
-        if (virCPUDefParseXML(ctxt, NULL, cpuType, &cpus[i]) < 0)
+        if (virCPUDefParseXML(ctxt, NULL, cpuType, &cpus[i], false) < 0)
             goto error;
 
         xmlXPathFreeContext(ctxt);
diff --git a/src/conf/cpu_conf.h b/src/conf/cpu_conf.h
index 24c51e3a63..3ef14b7932 100644
--- a/src/conf/cpu_conf.h
+++ b/src/conf/cpu_conf.h
@@ -192,13 +192,15 @@ virCPUDefCopyWithoutModel(const virCPUDef *cpu);
 int
 virCPUDefParseXMLString(const char *xml,
                         virCPUType type,
-                        virCPUDefPtr *cpu);
+                        virCPUDefPtr *cpu,
+                        bool validateXML);
 
 int
 virCPUDefParseXML(xmlXPathContextPtr ctxt,
                   const char *xpath,
                   virCPUType mode,
-                  virCPUDefPtr *cpu);
+                  virCPUDefPtr *cpu,
+                  bool validateXML);
 
 bool
 virCPUDefIsEqual(virCPUDefPtr src,
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index a91dbd4aa9..e8e64d3ef0 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -21663,7 +21663,8 @@ virDomainDefParseXML(xmlDocPtr xml,
     }
     VIR_FREE(nodes);
 
-    if (virCPUDefParseXML(ctxt, "./cpu[1]", VIR_CPU_TYPE_GUEST, &def->cpu) < 0)
+    if (virCPUDefParseXML(ctxt, "./cpu[1]", VIR_CPU_TYPE_GUEST, &def->cpu,
+                          false) < 0)
         goto error;
 
     if (virDomainNumaDefParseXML(def->numa, ctxt) < 0)
diff --git a/src/cpu/cpu.c b/src/cpu/cpu.c
index 188c5d86b5..bf94811960 100644
--- a/src/cpu/cpu.c
+++ b/src/cpu/cpu.c
@@ -109,14 +109,15 @@ virCPUCompareResult
 virCPUCompareXML(virArch arch,
                  virCPUDefPtr host,
                  const char *xml,
-                 bool failIncompatible)
+                 bool failIncompatible,
+                 bool validateXML)
 {
     g_autoptr(virCPUDef) cpu = NULL;
 
     VIR_DEBUG("arch=%s, host=%p, xml=%s",
               virArchToString(arch), host, NULLSTR(xml));
 
-    if (virCPUDefParseXMLString(xml, VIR_CPU_TYPE_AUTO, &cpu) < 0)
+    if (virCPUDefParseXMLString(xml, VIR_CPU_TYPE_AUTO, &cpu, validateXML) < 0)
         return VIR_CPU_COMPARE_ERROR;
 
     return virCPUCompare(arch, host, cpu, failIncompatible);
diff --git a/src/cpu/cpu.h b/src/cpu/cpu.h
index ba8fdd07ba..cc2d132275 100644
--- a/src/cpu/cpu.h
+++ b/src/cpu/cpu.h
@@ -153,7 +153,8 @@ virCPUCompareResult
 virCPUCompareXML(virArch arch,
                  virCPUDefPtr host,
                  const char *xml,
-                 bool failIncompatible);
+                 bool failIncompatible,
+                 bool validateXML);
 
 virCPUCompareResult
 virCPUCompare(virArch arch,
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index 571b70f982..f4a1a8b1df 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -6536,19 +6536,22 @@ libxlConnectCompareCPU(virConnectPtr conn,
     libxlDriverConfigPtr cfg;
     int ret = VIR_CPU_COMPARE_ERROR;
     bool failIncompatible;
+    bool validateXML;
 
-    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE,
+    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE |
+                  VIR_CONNECT_COMPARE_CPU_VALIDATE_XML,
                   VIR_CPU_COMPARE_ERROR);
 
     if (virConnectCompareCPUEnsureACL(conn) < 0)
         return ret;
 
     failIncompatible = !!(flags & VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE);
+    validateXML = !!(flags & VIR_CONNECT_COMPARE_CPU_VALIDATE_XML);
 
     cfg = libxlDriverConfigGet(driver);
 
     ret = virCPUCompareXML(cfg->caps->host.arch, cfg->caps->host.cpu,
-                           xmlDesc, failIncompatible);
+                           xmlDesc, failIncompatible, validateXML);
 
     virObjectUnref(cfg);
     return ret;
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 279de2997d..b68a902562 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -3135,7 +3135,8 @@ qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt,
 
     qemuDomainSetPrivatePathsOld(driver, vm);
 
-    if (virCPUDefParseXML(ctxt, "./cpu", VIR_CPU_TYPE_GUEST, &priv->origCPU) < 0)
+    if (virCPUDefParseXML(ctxt, "./cpu", VIR_CPU_TYPE_GUEST, &priv->origCPU,
+                          false) < 0)
         goto error;
 
     priv->chardevStdioLogd = virXPathBoolean("boolean(./chardevStdioLogd)",
@@ -10009,7 +10010,7 @@ qemuDomainSaveCookieParse(xmlXPathContextPtr ctxt G_GNUC_UNUSED,
         return -1;
 
     if (virCPUDefParseXML(ctxt, "./cpu[1]", VIR_CPU_TYPE_GUEST,
-                          &cookie->cpu) < 0)
+                          &cookie->cpu, false) < 0)
         return -1;
 
     cookie->slirpHelper = virXPathBoolean("boolean(./slirpHelper)", ctxt) > 0;
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index b27f05992b..3fa35bc9d2 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -12227,20 +12227,23 @@ qemuConnectCompareCPU(virConnectPtr conn,
     virQEMUDriverPtr driver = conn->privateData;
     g_autoptr(virCPUDef) cpu = NULL;
     bool failIncompatible;
+    bool validateXML;
 
-    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE,
+    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE |
+                  VIR_CONNECT_COMPARE_CPU_VALIDATE_XML,
                   VIR_CPU_COMPARE_ERROR);
 
     if (virConnectCompareCPUEnsureACL(conn) < 0)
         return VIR_CPU_COMPARE_ERROR;
 
     failIncompatible = !!(flags & VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE);
+    validateXML = !!(flags & VIR_CONNECT_COMPARE_CPU_VALIDATE_XML);
 
     if (!(cpu = virQEMUDriverGetHostCPU(driver)))
         return VIR_CPU_COMPARE_ERROR;
 
     return virCPUCompareXML(driver->hostarch, cpu,
-                            xmlDesc, failIncompatible);
+                            xmlDesc, failIncompatible, validateXML);
 }
 
 
@@ -12295,18 +12298,21 @@ qemuConnectCompareHypervisorCPU(virConnectPtr conn,
     g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
     g_autoptr(virQEMUCaps) qemuCaps = NULL;
     bool failIncompatible;
+    bool validateXML;
     virCPUDefPtr hvCPU;
     virCPUDefPtr cpu = NULL;
     virArch arch;
     virDomainVirtType virttype;
 
-    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE,
+    virCheckFlags(VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE |
+                  VIR_CONNECT_COMPARE_CPU_VALIDATE_XML,
                   VIR_CPU_COMPARE_ERROR);
 
     if (virConnectCompareHypervisorCPUEnsureACL(conn) < 0)
         goto cleanup;
 
     failIncompatible = !!(flags & VIR_CONNECT_COMPARE_CPU_FAIL_INCOMPATIBLE);
+    validateXML = !!(flags & VIR_CONNECT_COMPARE_CPU_VALIDATE_XML);
 
     qemuCaps = virQEMUCapsCacheLookupDefault(driver->qemuCapsCache,
                                              emulator,
@@ -12330,10 +12336,12 @@ qemuConnectCompareHypervisorCPU(virConnectPtr conn,
     }
 
     if (ARCH_IS_X86(arch)) {
-        ret = virCPUCompareXML(arch, hvCPU, xmlCPU, failIncompatible);
+        ret = virCPUCompareXML(arch, hvCPU, xmlCPU, failIncompatible,
+                               validateXML);
     } else if (ARCH_IS_S390(arch) &&
                virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_MODEL_COMPARISON)) {
-        if (virCPUDefParseXMLString(xmlCPU, VIR_CPU_TYPE_AUTO, &cpu) < 0)
+        if (virCPUDefParseXMLString(xmlCPU, VIR_CPU_TYPE_AUTO, &cpu,
+                                    validateXML) < 0)
             goto cleanup;
 
         if (!cpu->model) {
diff --git a/src/qemu/qemu_migration_cookie.c b/src/qemu/qemu_migration_cookie.c
index 3ea46e1527..aef0b042e5 100644
--- a/src/qemu/qemu_migration_cookie.c
+++ b/src/qemu/qemu_migration_cookie.c
@@ -1342,7 +1342,8 @@ qemuMigrationCookieXMLParse(qemuMigrationCookiePtr mig,
         goto error;
 
     if (flags & QEMU_MIGRATION_COOKIE_CPU &&
-        virCPUDefParseXML(ctxt, "./cpu[1]", VIR_CPU_TYPE_GUEST, &mig->cpu) < 0)
+        virCPUDefParseXML(ctxt, "./cpu[1]", VIR_CPU_TYPE_GUEST, &mig->cpu,
+                          false) < 0)
         goto error;
 
     if (flags & QEMU_MIGRATION_COOKIE_ALLOW_REBOOT &&
diff --git a/tests/cputest.c b/tests/cputest.c
index 383da94938..78a7f2437a 100644
--- a/tests/cputest.c
+++ b/tests/cputest.c
@@ -81,7 +81,7 @@ cpuTestLoadXML(virArch arch, const char *name)
     if (!(doc = virXMLParseFileCtxt(xml, &ctxt)))
         goto cleanup;
 
-    virCPUDefParseXML(ctxt, NULL, VIR_CPU_TYPE_AUTO, &cpu);
+    virCPUDefParseXML(ctxt, NULL, VIR_CPU_TYPE_AUTO, &cpu, false);
 
  cleanup:
     xmlXPathFreeContext(ctxt);
@@ -120,7 +120,8 @@ cpuTestLoadMultiXML(virArch arch,
 
     for (i = 0; i < n; i++) {
         ctxt->node = nodes[i];
-        if (virCPUDefParseXML(ctxt, NULL, VIR_CPU_TYPE_HOST, &cpus[i]) < 0)
+        if (virCPUDefParseXML(ctxt, NULL, VIR_CPU_TYPE_HOST, &cpus[i],
+                              false) < 0)
             goto cleanup_cpus;
     }
 
-- 
2.26.2


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