Re: RFC: replace "no support for hypervisor" error

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Daniel Veillard wrote:

On Tue, Jun 19, 2007 at 02:16:23PM +0100, Richard W.M. Jones wrote:
(3) Split VIR_ERR_NO_SUPPORT into two categories. Currently this category mixes up cases where we fail to open a connection, and cases where there is no driver support for a particular operation (even with an open connection). In the first case, go through all the places which return this error and add proper diagnostic information to the error messages. 

  -- Again, I am prepared to do this if people think it's a good idea.


  It would be logical to separate the two, I think we already at the low level
do the difference but it doesn't show up at the error level.


The attached patch:
(1) Makes VIR_ERR_NO_SUPPORT mean that a function is not supported by the hypervisor. It changes the message to be more specific and coincidentally corrects a bug which was causing the optional info field to be dropped.
(2) Makes VIR_ERR_NO_CONNECT mean that we could not connect to the hypervisor.
(3) Deprecates VIR_ERR_CALL_FAILED, because the meaning and use of this overlapped with VIR_ERR_NO_SUPPORT, and some calls failed with one and other calls failed with the other. Accordingly it changes all VIR_ERR_CALL_FAILED errors into VIR_ERR_NO_SUPPORT errors.
(4) Removes all error messages which occur before VIR_DRV_OPEN_DECLINED. If a driver is declines a URI, then that is normal behaviour and no reason to print an error. A later driver in the chain may accept the URI, and if none of the drivers can accept it then libvirt.c:do_open contains code to generate an error.
(5) If xen_unified.c was passed a naked string like "foo" as a URI then it would try to use it as a relative file reference. This was wrong and obscures a whole class of error message, so I've changed it so that xen_unified.c will only try to accept an absolute pathname (eg. ///var/lib/xen/xend-socket). 

Rich.

--
Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/
Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod
Street, Windsor, Berkshire, SL4 1TE, United Kingdom.  Registered in
England and Wales under Company Registration No. 03798903

Index: src/virterror.c
===================================================================
RCS file: /data/cvs/libvirt/src/virterror.c,v
retrieving revision 1.26
diff -u -r1.26 virterror.c
--- src/virterror.c	7 Jun 2007 13:05:01 -0000	1.26
+++ src/virterror.c	20 Jun 2007 13:03:39 -0000
@@ -410,10 +410,10 @@
             errmsg = _("out of memory");
             break;
         case VIR_ERR_NO_SUPPORT:
-            if (info != NULL)
-		errmsg = _("no support for hypervisor");
+            if (info == NULL)
+		errmsg = _("this function is not supported by the hypervisor");
 	    else
-		errmsg = _("no support for hypervisor %s");
+		errmsg = _("this function is not supported by the hypervisor: %s");
             break;
         case VIR_ERR_NO_CONNECT:
             if (info == NULL)
@@ -538,7 +538,7 @@
             else
                 errmsg = _("too many drivers registered in %s");
             break;
-        case VIR_ERR_CALL_FAILED:
+        case VIR_ERR_CALL_FAILED: /* DEPRECATED, use VIR_ERR_NO_SUPPORT */
             if (info == NULL)
                 errmsg = _("library call failed, possibly not supported");
             else
Index: src/libvirt.c
===================================================================
RCS file: /data/cvs/libvirt/src/libvirt.c,v
retrieving revision 1.76
diff -u -r1.76 libvirt.c
--- src/libvirt.c	20 Jun 2007 10:01:14 -0000	1.76
+++ src/libvirt.c	20 Jun 2007 13:03:41 -0000
@@ -314,7 +314,8 @@
     }
 
     if (!ret->driver) {
-        virLibConnError (NULL, VIR_ERR_NO_SUPPORT, name);
+        /* If we reach here, then all drivers declined the connection. */
+        virLibConnError (NULL, VIR_ERR_NO_CONNECT, name);
         goto failed;
     }
 
@@ -889,7 +890,7 @@
     if (conn->driver->domainSave)
         return conn->driver->domainSave (domain, to);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -942,7 +943,7 @@
     if (conn->driver->domainRestore)
         return conn->driver->domainRestore (conn, from);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1001,7 +1002,7 @@
     if (conn->driver->domainCoreDump)
         return conn->driver->domainCoreDump (domain, to, flags);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1037,7 +1038,7 @@
     if (conn->driver->domainShutdown)
         return conn->driver->domainShutdown (domain);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1071,7 +1072,7 @@
     if (conn->driver->domainReboot)
         return conn->driver->domainReboot (domain, flags);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1217,7 +1218,7 @@
     if (conn->driver->domainGetOSType)
         return conn->driver->domainGetOSType (domain);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -1246,7 +1247,7 @@
     if (conn->driver->domainGetMaxMemory)
         return conn->driver->domainGetMaxMemory (domain);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return 0;
 }
 
@@ -1288,7 +1289,7 @@
     if (conn->driver->domainSetMaxMemory)
         return conn->driver->domainSetMaxMemory (domain, memory);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1331,7 +1332,7 @@
     if (conn->driver->domainSetMemory)
         return conn->driver->domainSetMemory (domain, memory);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1367,7 +1368,7 @@
     if (conn->driver->domainGetInfo)
         return conn->driver->domainGetInfo (domain, info);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1401,7 +1402,7 @@
     if (conn->driver->domainDumpXML)
         return conn->driver->domainDumpXML (domain, flags);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -1429,7 +1430,7 @@
     if (conn->driver->nodeGetInfo)
         return conn->driver->nodeGetInfo (conn, info);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1454,7 +1455,7 @@
     if (conn->driver->getCapabilities)
         return conn->driver->getCapabilities (conn);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -1489,7 +1490,7 @@
         return schedtype;
     }
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -1528,7 +1529,7 @@
     if (conn->driver->domainGetSchedulerParameters)
         return conn->driver->domainGetSchedulerParameters (domain, params, nparams);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1564,7 +1565,7 @@
     if (conn->driver->domainSetSchedulerParameters)
         return conn->driver->domainSetSchedulerParameters (domain, params, nparams);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1603,7 +1604,7 @@
     if (conn->driver->domainDefineXML)
         return conn->driver->domainDefineXML (conn, xml);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -1632,7 +1633,7 @@
     if (conn->driver->domainUndefine)
         return conn->driver->domainUndefine (domain);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1655,7 +1656,7 @@
     if (conn->driver->numOfDefinedDomains)
         return conn->driver->numOfDefinedDomains (conn);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1685,7 +1686,7 @@
     if (conn->driver->listDefinedDomains)
         return conn->driver->listDefinedDomains (conn, names, maxnames);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1719,7 +1720,7 @@
     if (conn->driver->domainCreate)
         return conn->driver->domainCreate (domain);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1754,7 +1755,7 @@
     if (conn->driver->domainGetAutostart)
         return conn->driver->domainGetAutostart (domain, autostart);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1784,7 +1785,7 @@
     if (conn->driver->domainSetAutostart)
         return conn->driver->domainSetAutostart (domain, autostart);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1828,7 +1829,7 @@
     if (conn->driver->domainSetVcpus)
         return conn->driver->domainSetVcpus (domain, nvcpus);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1879,7 +1880,7 @@
     if (conn->driver->domainPinVcpu)
         return conn->driver->domainPinVcpu (domain, vcpu, cpumap, maplen);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1933,7 +1934,7 @@
         return conn->driver->domainGetVcpus (domain, info, maxinfo,
                                              cpumaps, maplen);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1964,7 +1965,7 @@
     if (conn->driver->domainGetMaxVcpus)
         return conn->driver->domainGetMaxVcpus (domain);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -1996,7 +1997,7 @@
     if (conn->driver->domainAttachDevice)
         return conn->driver->domainAttachDevice (domain, xml);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2027,7 +2028,7 @@
     if (conn->driver->domainDetachDevice)
         return conn->driver->domainDetachDevice (domain, xml);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2050,7 +2051,7 @@
     if (conn->networkDriver && conn->networkDriver->numOfNetworks)
         return conn->networkDriver->numOfNetworks (conn);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2080,7 +2081,7 @@
     if (conn->networkDriver && conn->networkDriver->listNetworks)
         return conn->networkDriver->listNetworks (conn, names, maxnames);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2103,7 +2104,7 @@
     if (conn->networkDriver && conn->networkDriver->numOfDefinedNetworks)
         return conn->networkDriver->numOfDefinedNetworks (conn);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2135,7 +2136,7 @@
         return conn->networkDriver->listDefinedNetworks (conn,
                                                          names, maxnames);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2163,7 +2164,7 @@
     if (conn->networkDriver && conn->networkDriver->networkLookupByName)
         return conn->networkDriver->networkLookupByName (conn, name);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -2191,7 +2192,7 @@
     if (conn->networkDriver && conn->networkDriver->networkLookupByUUID)
         return conn->networkDriver->networkLookupByUUID (conn, uuid);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -2273,7 +2274,7 @@
     if (conn->networkDriver && conn->networkDriver->networkCreateXML)
         return conn->networkDriver->networkCreateXML (conn, xmlDesc);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -2305,7 +2306,7 @@
     if (conn->networkDriver && conn->networkDriver->networkDefineXML)
         return conn->networkDriver->networkDefineXML (conn, xml);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -2334,7 +2335,7 @@
     if (conn->networkDriver && conn->networkDriver->networkUndefine)
         return conn->networkDriver->networkUndefine (network);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2368,7 +2369,7 @@
     if (conn->networkDriver && conn->networkDriver->networkCreate)
         return conn->networkDriver->networkCreate (network);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2403,7 +2404,7 @@
     if (conn->networkDriver && conn->networkDriver->networkDestroy)
         return conn->networkDriver->networkDestroy (network);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2539,7 +2540,7 @@
     if (conn->networkDriver && conn->networkDriver->networkDumpXML)
         return conn->networkDriver->networkDumpXML (network, flags);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -2568,7 +2569,7 @@
     if (conn->networkDriver && conn->networkDriver->networkGetBridgeName)
         return conn->networkDriver->networkGetBridgeName (network);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return NULL;
 }
 
@@ -2603,7 +2604,7 @@
     if (conn->networkDriver && conn->networkDriver->networkGetAutostart)
         return conn->networkDriver->networkGetAutostart (network, autostart);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
@@ -2633,7 +2634,7 @@
     if (conn->networkDriver && conn->networkDriver->networkSetAutostart)
         return conn->networkDriver->networkSetAutostart (network, autostart);
 
-    virLibConnError (conn, VIR_ERR_CALL_FAILED, __FUNCTION__);
+    virLibConnError (conn, VIR_ERR_NO_SUPPORT, __FUNCTION__);
     return -1;
 }
 
Index: src/qemu_internal.c
===================================================================
RCS file: /data/cvs/libvirt/src/qemu_internal.c,v
retrieving revision 1.27
diff -u -r1.27 qemu_internal.c
--- src/qemu_internal.c	15 Jun 2007 15:24:20 -0000	1.27
+++ src/qemu_internal.c	20 Jun 2007 13:03:42 -0000
@@ -473,7 +473,6 @@
 
     uri = xmlParseURI(name);
     if (uri == NULL) {
-        qemuError(NULL, NULL, VIR_ERR_NO_SUPPORT, name);
         return VIR_DRV_OPEN_DECLINED;
     }
 
Index: src/test.c
===================================================================
RCS file: /data/cvs/libvirt/src/test.c,v
retrieving revision 1.33
diff -u -r1.33 test.c
--- src/test.c	20 Jun 2007 10:01:14 -0000	1.33
+++ src/test.c	20 Jun 2007 13:03:43 -0000
@@ -720,7 +720,6 @@
 
     uri = xmlParseURI(name);
     if (uri == NULL) {
-        testError(NULL, NULL, VIR_ERR_NO_SUPPORT, name);
         return VIR_DRV_OPEN_DECLINED;
     }
 
Index: src/xen_unified.c
===================================================================
RCS file: /data/cvs/libvirt/src/xen_unified.c,v
retrieving revision 1.11
diff -u -r1.11 xen_unified.c
--- src/xen_unified.c	20 Jun 2007 10:01:14 -0000	1.11
+++ src/xen_unified.c	20 Jun 2007 13:03:43 -0000
@@ -99,23 +99,33 @@
 
     uri = xmlParseURI(name);
     if (uri == NULL) {
-        xenUnifiedError(NULL, VIR_ERR_NO_SUPPORT, name);
         return VIR_DRV_OPEN_DECLINED;
     }
 
-    /* Refuse any URI which doesn't start xen:///, / or http:// */
+    /* Refuse any scheme which isn't "xen://" or "http://";. */
     if (uri->scheme &&
         strcasecmp(uri->scheme, "xen") != 0 &&
-        strcasecmp(uri->scheme, "http")) {
+        strcasecmp(uri->scheme, "http") != 0) {
+        xmlFreeURI(uri);
+        return VIR_DRV_OPEN_DECLINED;
+    }
+
+    /* xmlParseURI will parse a naked string like "foo" as a URI with
+     * a NULL scheme.  That's not useful for us because we want to only
+     * allow full pathnames (eg. ///var/lib/xen/xend-socket).  Decline
+     * anything else.
+     */
+    if (!uri->scheme && name[0] != '/') {
         xmlFreeURI(uri);
         return VIR_DRV_OPEN_DECLINED;
     }
 
     /* Refuse any xen:// URI with a server specified - allow remote to do it */
-    if (uri->scheme && !strcasecmp(uri->scheme, "xen") && uri->server) {
+    if (uri->scheme && strcasecmp(uri->scheme, "xen") == 0 && uri->server) {
         xmlFreeURI(uri);
         return VIR_DRV_OPEN_DECLINED;
     }
+
     xmlFreeURI(uri);
 
     /* Allocate per-connection private data. */
Index: src/xend_internal.c
===================================================================
RCS file: /data/cvs/libvirt/src/xend_internal.c,v
retrieving revision 1.121
diff -u -r1.121 xend_internal.c
--- src/xend_internal.c	19 Jun 2007 19:08:09 -0000	1.121
+++ src/xend_internal.c	20 Jun 2007 13:03:45 -0000
@@ -1975,14 +1975,14 @@
          */
         uri = xmlParseURI(name);
         if (uri == NULL) {
-            virXendError(NULL, VIR_ERR_NO_SUPPORT, name);
+            virXendError(NULL, VIR_ERR_NO_CONNECT, name);
             goto failed;
         }
 
         if (uri->scheme == NULL) {
             /* It should be a file access */
             if (uri->path == NULL) {
-                virXendError(NULL, VIR_ERR_NO_SUPPORT, name);
+                virXendError(NULL, VIR_ERR_NO_CONNECT, name);
                 goto failed;
             }
             ret = xenDaemonOpen_unix(conn, uri->path);
@@ -2000,7 +2000,7 @@
             if (ret == -1)
                 goto failed;
         } else {
-            virXendError(NULL, VIR_ERR_NO_SUPPORT, name);
+            virXendError(NULL, VIR_ERR_NO_CONNECT, name);
             goto failed;
         }
     }
Index: include/libvirt/virterror.h
===================================================================
RCS file: /data/cvs/libvirt/include/libvirt/virterror.h,v
retrieving revision 1.24
diff -u -r1.24 virterror.h
--- include/libvirt/virterror.h	7 Jun 2007 13:05:01 -0000	1.24
+++ include/libvirt/virterror.h	20 Jun 2007 13:03:45 -0000
@@ -86,7 +86,7 @@
     VIR_ERR_OK = 0,
     VIR_ERR_INTERNAL_ERROR, /* internal error */
     VIR_ERR_NO_MEMORY,  /* memory allocation failure */
-    VIR_ERR_NO_SUPPORT, /* no support for this connection */
+    VIR_ERR_NO_SUPPORT, /* no support for this function */
     VIR_ERR_UNKNOWN_HOST,/* could not resolve hostname */
     VIR_ERR_NO_CONNECT, /* can't connect to hypervisor */
     VIR_ERR_INVALID_CONN,/* invalid connection object */
@@ -109,7 +109,7 @@
     VIR_ERR_NO_DEVICE, /* missing domain devices information */
     VIR_ERR_NO_XENSTORE,/* could not open Xen Store control */
     VIR_ERR_DRIVER_FULL, /* too many drivers registered */
-    VIR_ERR_CALL_FAILED, /* not supported by the drivers */
+    VIR_ERR_CALL_FAILED, /* not supported by the drivers (DEPRECATED) */
     VIR_ERR_XML_ERROR, /* an XML description is not well formed or broken */
     VIR_ERR_DOM_EXIST,/* the domain already exist */
     VIR_ERR_OPERATION_DENIED, /* operation forbidden on read-only connections */

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