Re: [libvirt] vTPM support in libvirt

Index: src/domain_conf.c =================================================================== RCS file: /data/cvs/libvirt/src/domain_conf.c,v retrieving revision 1.88 diff -u -r1.88 domain_conf.c --- src/domain_conf.c 25 Jun 2009 13:55:58 -0000 1.88 +++ src/domain_conf.c 27 Jun 2009 15:12:28 -0000 @@ -461,6 +461,8 @@ for (i = 0 ; i < def->nhostdevs ; i++) virDomainHostdevDefFree(def->hostdevs[i]); VIR_FREE(def->hostdevs); + + VIR_FREE(def->tpm); VIR_FREE(def->os.type); VIR_FREE(def->os.arch); @@ -1622,6 +1624,62 @@ } +/* Parse the XML definition for a vTPM device (<tpm instance="optional_instance_number">) */ +static virDomainTpmDefPtr +virDomainTpmDefParseXML(virConnectPtr conn, + xmlNodePtr node, int flags) { +

+ flags = flags; /* TODO: Andreas Sommer <AndiDog(a)web.de&gt; flags unused, what are they used for */ +

+ virDomainTpmDefPtr def; + char *instance = NULL; + + if (VIR_ALLOC(def) < 0) { + virReportOOMError(conn); + return NULL; + } + + instance = virXMLPropString(node, "instance"); + + /* Attribute "instance" is optional*/ + if (instance) { + /* "instance" is defined as a number >= 0 */ + if (!c_isdigit(*instance) || *instance == '0') { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("TPM instance attribute '%s' found, but must be a number >= 0 (make sure no whitespaces or leading zeroes are contained)"), instance); + goto error; + } + + const char *check = &instance[1]; + while (*check && c_isdigit(*check)) ++check; + if (*check) { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("TPM instance attribute '%s' contains non-digits, must be a number >= 0 (make sure no whitespaces or leading zeroes are contained)"), instance); + goto error; + } + + int err = virStrToLong_l("instance", NULL, 10, &def->instance); + if (err) { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + _("TPM instance '%s' is not a valid number"), instance); + goto error; + } + } + else + def->instance = -1; + +cleanup: + VIR_FREE(instance); + + return def; + +error: + VIR_FREE(def); + def = NULL; + goto cleanup; +} + + static virDomainSoundDefPtr virDomainSoundDefParseXML(virConnectPtr conn, const xmlNodePtr node, @@ -2617,6 +2675,30 @@ def->inputs[def->ninputs] = input; def->ninputs++; } + + + /* analysis of the vTPM device */ + if ((n = virXPathNodeSet(conn, "./devices/tpm", ctxt, &nodes)) < 0) { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + "%s", _("cannot extract vTPM device")); + goto error; + } + if (n > 1) { + virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR, + "%s", _("there can only be one vTPM device")); + goto error; + } + if (n == 1) { + virDomainTpmDefPtr tpm = virDomainTpmDefParseXML(conn, + nodes[0], + flags); + + if (!tpm) + goto error; + + def->tpm = tpm; + } + VIR_FREE(nodes); /* analysis of the sound devices */ @@ -3856,6 +3938,13 @@ goto cleanup; } + if (def->tpm) { + virBufferVSprintf(&buf, " <tpm"); + if (def->tpm->instance >= 0) + virBufferVSprintf(&buf, " instance='%ld'", def->tpm->instance); + virBufferVSprintf(&buf, "/>\n"); + } +