[PATCH v2 2/6] conf: Parse the iser element

[Han Han <hhan@xxxxxxxxxx>]

Now libvirt supports to parse the iser element in source. It will be
used to enable the iSCSI iSER.

Signed-off-by: Han Han <hhan@xxxxxxxxxx>
---
 src/conf/domain_conf.c    | 10 ++++++++++
 src/util/virstoragefile.c | 17 ++++++++++++++---
 src/util/virstoragefile.h |  2 ++
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index c201fc90..9008eead 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -9488,6 +9488,7 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
     g_autofree char *haveTLS = NULL;
     g_autofree char *tlsCfg = NULL;
     g_autofree char *sslverifystr = NULL;
+    int iscsiIser = 0;
     xmlNodePtr tmpnode;
 
     if (!(protocol = virXMLPropString(node, "protocol"))) {
@@ -9598,6 +9599,12 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
         }
     }
 
+    if (src->protocol == VIR_STORAGE_NET_PROTOCOL_ISCSI) {
+        if ((iscsiIser = virXPathBoolean("boolean(./iser)", ctxt)) == -1)
+            return -1;
+        src->iscsiIser = (bool)iscsiIser;
+    }
+
     return 0;
 }
 
@@ -24944,6 +24951,9 @@ virDomainDiskSourceFormatNetwork(virBufferPtr attrBuf,
 
     virStorageSourceInitiatorFormatXML(&src->initiator, childBuf);
 
+    if (src->iscsiIser)
+        virBufferAddLit(childBuf, "<iser/>\n");
+
     if (src->sslverify != VIR_TRISTATE_BOOL_ABSENT) {
         virBufferAsprintf(childBuf, "<ssl verify='%s'/>\n",
                           virTristateBoolTypeToString(src->sslverify));
diff --git a/src/util/virstoragefile.c b/src/util/virstoragefile.c
index 535a94e2..fd687e62 100644
--- a/src/util/virstoragefile.c
+++ b/src/util/virstoragefile.c
@@ -2805,8 +2805,15 @@ virStorageSourceParseBackingURI(virStorageSourcePtr src,
     if (!(scheme = virStringSplit(uri->scheme, "+", 2)))
         return -1;
 
+    src->protocol = virStorageNetProtocolTypeFromString(scheme[0]);
+
+    if (STREQ(scheme[0], "iser")) {
+        src->protocol = VIR_STORAGE_NET_PROTOCOL_ISCSI;
+        src->iscsiIser = true;
+    }
+
     if (!scheme[0] ||
-        (src->protocol = virStorageNetProtocolTypeFromString(scheme[0])) < 0) {
+        src->protocol < 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("invalid backing protocol '%s'"),
                        NULLSTR(scheme[0]));
@@ -3509,12 +3516,16 @@ virStorageSourceParseBackingJSONiSCSI(virStorageSourcePtr src,
 
     src->nhosts = 1;
 
-    if (STRNEQ_NULLABLE(transport, "tcp")) {
+    if (STRNEQ_NULLABLE(transport, "tcp") &&
+        STRNEQ_NULLABLE(transport, "iser")) {
         virReportError(VIR_ERR_INVALID_ARG, "%s",
-                       _("only TCP transport is supported for iSCSI volumes"));
+                       _("only TCP or iSER transport is supported for iSCSI volumes"));
         return -1;
     }
 
+    if (STREQ(transport, "iser"))
+        src->iscsiIser = true;
+
     src->hosts->transport = VIR_STORAGE_NET_HOST_TRANS_TCP;
 
     if (!portal) {
diff --git a/src/util/virstoragefile.h b/src/util/virstoragefile.h
index c68bdc96..e1773ba0 100644
--- a/src/util/virstoragefile.h
+++ b/src/util/virstoragefile.h
@@ -383,6 +383,8 @@ struct _virStorageSource {
     /* these must not be used apart from formatting the output JSON in the qemu driver */
     char *ssh_user;
     bool ssh_host_key_check_disabled;
+
+    bool iscsiIser; /* An optional setting for iSCSI iSER transport*/
 };
 
 G_DEFINE_AUTOPTR_CLEANUP_FUNC(virStorageSource, virObjectUnref);
-- 
2.25.0