[PATCH 4/6] admin: support server cert update mode

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virAdmServerUpdateTlsFiles:
@flags specifies how to update server cert/key in tls service.
Two modes are currently supported: append mode and clear mode, means
whether to clear the original cert then add the new one, or just append
to the original one.
---
 include/libvirt/libvirt-admin.h | 14 ++++++++++++++
 src/admin/admin_server.c        |  7 +------
 src/admin/libvirt-admin.c       |  7 ++++++-
 src/rpc/virnetserver.c          | 17 +++++++++++++----
 src/rpc/virnetserver.h          |  3 ++-
 src/rpc/virnettlscontext.c      |  7 +++++--
 src/rpc/virnettlscontext.h      |  3 ++-
 7 files changed, 43 insertions(+), 15 deletions(-)

diff --git a/include/libvirt/libvirt-admin.h b/include/libvirt/libvirt-admin.h
index 6e38261129..dfdd81ae83 100644
--- a/include/libvirt/libvirt-admin.h
+++ b/include/libvirt/libvirt-admin.h
@@ -392,6 +392,20 @@ int virAdmClientClose(virAdmClientPtr client, unsigned int flags);

 # define VIR_SERVER_CLIENTS_UNAUTH_CURRENT "nclients_unauth"

+typedef enum {
+    /* free old credentials and then set new tls context.
+     */
+    VIR_TLS_UPDATE_CLEAR                  = 0,
+
+    /* do not clear original certificates and keys.
+     */
+    VIR_TLS_UPDATE_APPEND                 = 1,
+
+    /* boundary value for flag check (unreachable).
+     */
+    VIR_TLS_UPDATE_FLAG_MAX               = 2,
+} virServerTlsUpdateFlag;
+
 /* tls related filetype flags. */
 typedef enum {
     VIR_TLS_FILE_TYPE_CA_CERT             = (1U << 0),
diff --git a/src/admin/admin_server.c b/src/admin/admin_server.c
index 558913367b..43c7e00d90 100644
--- a/src/admin/admin_server.c
+++ b/src/admin/admin_server.c
@@ -373,10 +373,5 @@ adminServerUpdateTlsFiles(virNetServerPtr srv,
                           unsigned int filetypes,
                           unsigned int flags)
 {
-    virCheckFlags(0, -1);
-
-    if (virNetServerUpdateTlsFiles(srv, filetypes) < 0)
-        return -1;
-
-    return 0;
+    return virNetServerUpdateTlsFiles(srv, filetypes, flags);
 }
diff --git a/src/admin/libvirt-admin.c b/src/admin/libvirt-admin.c
index f3f92ed91c..b6ba72b577 100644
--- a/src/admin/libvirt-admin.c
+++ b/src/admin/libvirt-admin.c
@@ -1086,12 +1086,17 @@ virAdmServerSetClientLimits(virAdmServerPtr srv,
  * virAdmServerUpdateTlsFiles:
  * @srv: a valid server object reference
  * @filetypes: bitwise-OR of virServerTlsFiletype
- * @flags: extra flags; not used yet, so callers should always pass 0
+ * @flags: mode that specifies the update method
  *
  * Notify server to update tls file, such as cacert, cacrl, server cert / key.
  * Mark the files that need to be updated by the @filetypes parameter.
  * See virServerTlsFiletype for detailed description of accepted filetypes.
  *
+ * @flags specifies how to update server cert/key in tls service,
+ * and is either the value VIR_TLS_UPDATE_APPEND, or VIR_TLS_UPDATE_CLEAR.
+ * The default value is VIR_TLS_UPDATE_CLEAR. See virServerTlsUpdateFlag for
+ * detailed description.
+ *
  * Returns 0 if the TLS files have been updated successfully or -1 in case of an
  * error.
  */
diff --git a/src/rpc/virnetserver.c b/src/rpc/virnetserver.c
index 65ec677d0a..72c4d37bc6 100644
--- a/src/rpc/virnetserver.c
+++ b/src/rpc/virnetserver.c
@@ -1226,7 +1226,8 @@ virNetServerGetTLSContext(virNetServerPtr srv)
     return ctxt;
 }

-static int virNetServerUpdateTlsFilesCheckParams(unsigned int filetypes)
+static int virNetServerUpdateTlsFilesCheckParams(unsigned int filetypes,
+                                                 unsigned int flags)
 {
     bool haveSrvCert = filetypes & VIR_TLS_FILE_TYPE_SERVER_CERT;
     bool haveSrvKey = filetypes & VIR_TLS_FILE_TYPE_SERVER_KEY;
@@ -1239,12 +1240,20 @@ static int virNetServerUpdateTlsFilesCheckParams(unsigned int filetypes)
         return -1;
     }

+    if (flags >= VIR_TLS_UPDATE_FLAG_MAX) {
+        virReportError(VIR_ERR_SYSTEM_ERROR,
+                       _("don not support flags: %d"),
+                       flags);
+        return -1;
+    }
+
     return 0;
 }

 int
 virNetServerUpdateTlsFiles(virNetServerPtr srv,
-                           unsigned int filetypes)
+                           unsigned int filetypes,
+                           unsigned int flags)
 {
     int ret = -1;
 #ifndef WITH_GNUTLS
@@ -1254,7 +1263,7 @@ virNetServerUpdateTlsFiles(virNetServerPtr srv,
 #else
     virNetTLSContextPtr ctxt = NULL;

-    if (virNetServerUpdateTlsFilesCheckParams(filetypes))
+    if (virNetServerUpdateTlsFilesCheckParams(filetypes, flags))
         return -1;

     virObjectLock(srv);
@@ -1266,7 +1275,7 @@ virNetServerUpdateTlsFiles(virNetServerPtr srv,
         goto cleanup;
     }

-    if (virNetTLSContextReload(ctxt, filetypes)) {
+    if (virNetTLSContextReload(ctxt, filetypes, flags)) {
         VIR_ERROR(_("reload server's tls context fail"));
         goto cleanup;
     }
diff --git a/src/rpc/virnetserver.h b/src/rpc/virnetserver.h
index 99466dd041..1a905aa483 100644
--- a/src/rpc/virnetserver.h
+++ b/src/rpc/virnetserver.h
@@ -135,4 +135,5 @@ int virNetServerSetClientLimits(virNetServerPtr srv,
                                 long long int maxClientsUnauth);

 int virNetServerUpdateTlsFiles(virNetServerPtr srv,
-                               unsigned int filetypes);
+                               unsigned int filetypes,
+                               unsigned int flags);
diff --git a/src/rpc/virnettlscontext.c b/src/rpc/virnettlscontext.c
index 8baa6a15b2..a66aaece69 100644
--- a/src/rpc/virnettlscontext.c
+++ b/src/rpc/virnettlscontext.c
@@ -1140,7 +1140,8 @@ void virNetTLSContextDispose(void *obj)
 }

 int virNetTLSContextReload(virNetTLSContextPtr ctxt,
-                           unsigned int filetypes)
+                           unsigned int filetypes,
+                           unsigned int flags)
 {
     int ret = -1;
     char *cacert = NULL;
@@ -1165,7 +1166,9 @@ int virNetTLSContextReload(virNetTLSContextPtr ctxt,
     }

     if (filetypes & VIR_TLS_FILE_TYPE_SERVER_CERT) {
-        gnutls_certificate_free_keys(ctxt->x509cred);
+        if (flags == VIR_TLS_UPDATE_CLEAR)
+            gnutls_certificate_free_keys(ctxt->x509cred);
+
         if (virNetTLSContextSetCertAndKey(ctxt, cert, key, false))
             goto cleanup;
     }
diff --git a/src/rpc/virnettlscontext.h b/src/rpc/virnettlscontext.h
index 9e83caf255..929487af99 100644
--- a/src/rpc/virnettlscontext.h
+++ b/src/rpc/virnettlscontext.h
@@ -66,7 +66,8 @@ int virNetTLSContextCheckCertificate(virNetTLSContextPtr ctxt,
                                      virNetTLSSessionPtr sess);

 int virNetTLSContextReload(virNetTLSContextPtr ctxt,
-                           unsigned int filetypes);
+                           unsigned int filetypes,
+                           unsigned int flags);

 typedef ssize_t (*virNetTLSSessionWriteFunc)(const char *buf, size_t len,
                                              void *opaque);
--
2.23.0.windows.1






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