On Tue, Aug 05, 2008 at 12:02:47PM +0200, Chris Lalancette wrote:

With the recent refactoring of the domain code, plus the changes with the Xend code, a couple of bugs were introduced into the attach-disk and attach-interface functionality. This patch fixes 3 bugs:

1) In xenDaemonAttachDevice(), there is a switch statement to determine which of the xenDaemonFormatSxpr{Disk,Net} functions to call. Unfortunately, the case statements are all missing the corresponding "break", so we always fall-through to the default error case. This patch just adds the appropriate break statements.

ACK

2) (minor) In xenDaemonDomainDefineXML (that's a mouthful!), there is a stray "fprintf". This is now converted to a proper virXendError().

ACK

3) xenDaemonFormatSxpr{Disk,Net} were adding an extra (device to the front of the sexpr expressions that xend did not expect (this is Xend on RHEL 5.2). Because of this, the attaches would fail. The patch fixes this by removing the (device from the front, which makes attach-disk and attach-interface work again.

This isn't entirely correct. The previous code was in fact inconsistent in this area. Taking libvirt 0.4.4 as an example - xenDaemonAttachDevice calls into - virParseXMLDevice returns the SEXPR by calling into - virDomainParseXMLDiskDesc or virDomainParseXMLIfDesc The DiskDesc method returns an SEXPR with a '(device ' prefix. THe IfDesc method returns a SEXPR without a '(device ' prefix. I'm pretty sure I've used the disk hotplug in RHEL5, which implies it does accept a (device prefix. I've never tried network hotplug, so can't say whether that worked or not. In any case I think this needs some more investigation of behaviour on Xen 3.0.3, vs 3.1.0 and 3.2.0 before we change the SEXPR again Regards, Daniel

Index: src/xend_internal.c =================================================================== RCS file: /data/cvs/libvirt/src/xend_internal.c,v retrieving revision 1.207 diff -u -r1.207 xend_internal.c --- a/src/xend_internal.c 4 Aug 2008 06:33:25 -0000 1.207 +++ b/src/xend_internal.c 5 Aug 2008 09:59:57 -0000 @@ -3900,6 +3900,7 @@ STREQ(def->os.type, "hvm") ? 1 : 0, priv->xendConfigVersion) < 0) goto cleanup; + break;

case VIR_DOMAIN_DEVICE_NET: if (xenDaemonFormatSxprNet(domain->conn, @@ -3908,6 +3909,7 @@ STREQ(def->os.type, "hvm") ? 1 : 0, priv->xendConfigVersion) < 0) goto cleanup; + break;

default: virXendError(domain->conn, VIR_ERR_NO_SUPPORT, "%s", @@ -4292,7 +4294,8 @@ ret = xend_op(conn, "", "op", "new", "config", sexpr, NULL); VIR_FREE(sexpr); if (ret != 0) { - fprintf(stderr, _("Failed to create inactive domain %s\n"), name); + virXendError(conn, VIR_ERR_XEN_CALL, + _("Failed to create inactive domain %s\n"), name); goto error; }

@@ -5029,7 +5032,6 @@ xendConfigVersion == 1) return 0;

- virBufferAddLit(buf, "(device "); /* Normally disks are in a (device (vbd ...)) block * but blktap disks ended up in a differently named * (device (tap ....)) block.... */ @@ -5083,7 +5085,7 @@ else virBufferAddLit(buf, "(mode 'w')");

- virBufferAddLit(buf, "))"); + virBufferAddLit(buf, ")");

return 0; } @@ -5117,7 +5119,7 @@ return -1; }

- virBufferAddLit(buf, "(device (vif "); + virBufferAddLit(buf, "(vif ");

virBufferVSprintf(buf, "(mac '%02x:%02x:%02x:%02x:%02x:%02x')", @@ -5177,7 +5179,7 @@ if ((hvm) && (xendConfigVersion < 4)) virBufferAddLit(buf, "(type ioemu)");

- virBufferAddLit(buf, "))"); + virBufferAddLit(buf, ")");

return 0; }

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