libxl: remove libxl_domain_create_info.poolname

It is redundant with poolid and allowing the user to specify both
opens up the possibility of a disconnect.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: juergen.gross@ts.fujitsu.com
[since v2 - correct default is 0 not -1]
Committed-by: Ian Jackson <Ian.Jackson@eu.citrix.com>

tools/libxl/libxl_create.c

@@ -441,8 +441,9 @@ retry_transaction:
 
     xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/uuid", vm_path), uuid_string, strlen(uuid_string));
     xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/name", vm_path), info->name, strlen(info->name));
-    if (info->poolname)
-        xs_write(ctx->xsh, t, libxl__sprintf(gc, "%s/pool_name", vm_path), info->poolname, strlen(info->poolname));
+    if (info->poolid != -1)
+        libxl__xs_write(gc, t, libxl__sprintf(gc, "%s/pool_name", vm_path),
+                        "%s", libxl__cpupoolid_to_name(gc, info->poolid));
 
     libxl__xs_writev(gc, t, dom_path, info->xsdata);
     libxl__xs_writev(gc, t, libxl__sprintf(gc, "%s/platform", dom_path), info->platformdata);

tools/libxl/libxl_types.idl

@@ -151,7 +151,6 @@ libxl_domain_create_info = Struct("domain_create_info",[
     ("xsdata",       libxl_key_value_list),
     ("platformdata", libxl_key_value_list),
     ("poolid",       uint32),
-    ("poolname",     string),
     ])
 
 libxl_domain_build_info = Struct("domain_build_info",[

tools/libxl/xl_cmdimpl.c

@@ -316,7 +316,7 @@ static void printf_info(int domid,
         printf("\t(uuid <unknown>)\n");
     }
 
-    printf("\t(cpupool %s)\n", c_info->poolname);
+    printf("\t(cpupool %s)\n", libxl_cpupoolid_to_name(ctx, c_info->poolid));
     if (c_info->xsdata)
         printf("\t(xsdata contains data)\n");
     else
@@ -703,8 +703,7 @@ static void parse_config_data(const char *configfile_filename_report,
         c_info->poolid = -1;
         cpupool_qualifier_to_cpupoolid(buf, &c_info->poolid, NULL);
     }
-    c_info->poolname = libxl_cpupoolid_to_name(ctx, c_info->poolid);
-    if (!c_info->poolname) {
+    if (!libxl_cpupoolid_to_name(ctx, c_info->poolid)) {
         fprintf(stderr, "Illegal pool specified\n");
         exit(1);
     }