xen/xen-qemu-iscsi-fix.patch

Index: xen-3.3.1-testing/tools/ioemu-remote/xenstore.c
===================================================================
--- xen-3.3.1-testing.orig/tools/ioemu-remote/xenstore.c
+++ xen-3.3.1-testing/tools/ioemu-remote/xenstore.c
@@ -153,7 +153,7 @@ void xenstore_parse_domain_config(int hv
     char *buf = NULL, *path;
     char *fpath = NULL, *bpath = NULL, *btype = NULL,
         *dev = NULL, *params = NULL, *type = NULL, *drv = NULL;
-    int i, any_hdN = 0, ret, is_tap;
+    int i, j, any_hdN = 0, ret, is_tap;
     unsigned int len, num, hd_index, pci_devid = 0;
     BlockDriverState *bs;
     BlockDriver *format;
@@ -238,12 +238,7 @@ void xenstore_parse_domain_config(int hv
             continue;
         free(type);
         type = xs_read(xsh, XBT_NULL, buf, &len);
-        if (pasprintf(&buf, "%s/params", bpath) == -1)
-            continue;
-        free(params);
-        params = xs_read(xsh, XBT_NULL, buf, &len);
-        if (params == NULL)
-            continue;
+
         /* read the name of the device */
         if (pasprintf(&buf, "%s/type", bpath) == -1)
             continue;
@@ -251,6 +246,35 @@ void xenstore_parse_domain_config(int hv
         drv = xs_read(xsh, XBT_NULL, buf, &len);
         if (drv == NULL)
             continue;
+
+        free(params);
+	if (!strcmp(drv,"iscsi"))
+        {
+          if (pasprintf(&buf, "%s/node", bpath) == -1)
+             continue;
+
+          /* wait for block-iscsi script to complete and populate the
+           * node entry.  try 30 times (30 secs) */
+          for (j = 0; j < 30; j++) {
+            params = xs_read(xsh, XBT_NULL, buf, &len);
+            if (params != NULL)
+               break;
+	    sleep(1);
+          }
+          if (params == NULL) {
+            fprintf(stderr, "qemu: iscsi device not found -- timed out \n");
+            continue;
+          }
+        }
+        else
+	{
+          if (pasprintf(&buf, "%s/params", bpath) == -1)
+              continue;
+           params = xs_read(xsh, XBT_NULL, buf, &len);
+           if (params == NULL)
+             continue;
+        }
+
         /* Obtain blktap sub-type prefix */
         if (!strcmp(drv, "tap") && params[0]) {
             char *offset = strchr(params, ':');