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libvirt/src/xml.c
Daniel Veillard 0742c9313e * src/xml.c: another patch from David Lutterkort fixing a typo 
when generating physical block devices descriptions.
Daniel
2006-03-04 09:00:15 +00:00

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25 KiB
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/*
* xml.c: XML based interfaces for the libvir library
*
* Copyright (C) 2005 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
* Daniel Veillard <veillard@redhat.com>
*/
#include "libvirt.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <xs.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include "internal.h"
#include "hash.h"
#include "sexpr.h"
#include "xml.h"
/**
* virXenError:
* @conn: the connection if available
* @error: the error number
* @info: extra information string
*
* Handle an error at the xend daemon interface
*/
static void
virXMLError(virErrorNumber error, const char *info, int value) {
const char *errmsg;
if (error == VIR_ERR_OK)
return;
errmsg = __virErrorMsg(error, info);
__virRaiseError(NULL, NULL, VIR_FROM_XML, error, VIR_ERR_ERROR,
errmsg, info, NULL, value, 0, errmsg, info,
value);
}
/**
* virBufferGrow:
* @buf: the buffer
* @len: the minimum free size to allocate
*
* Grow the available space of an XML buffer.
*
* Returns the new available space or -1 in case of error
*/
static int
virBufferGrow(virBufferPtr buf, unsigned int len) {
int size;
char *newbuf;
if (buf == NULL) return(-1);
if (len + buf->use < buf->size) return(0);
size = buf->use + len + 1000;
newbuf = (char *) realloc(buf->content, size);
if (newbuf == NULL) {
virXMLError(VIR_ERR_NO_MEMORY, "growing buffer", size);
return(-1);
}
buf->content = newbuf;
buf->size = size;
return(buf->size - buf->use);
}
/**
* virBufferAdd:
* @buf: the buffer to dump
* @str: the string
* @len: the number of bytes to add
*
* Add a string range to an XML buffer. if len == -1, the length of
* str is recomputed to the full string.
*
* Returns 0 successful, -1 in case of internal or API error.
*/
int
virBufferAdd(virBufferPtr buf, const char *str, int len) {
unsigned int needSize;
if ((str == NULL) || (buf == NULL)) {
return -1;
}
if (len == 0) return 0;
if (len < 0)
len = strlen(str);
needSize = buf->use + len + 2;
if (needSize > buf->size){
if (!virBufferGrow(buf, needSize)){
return(-1);
}
}
memmove(&buf->content[buf->use], str, len);
buf->use += len;
buf->content[buf->use] = 0;
return(0);
}
/**
* virBufferVSprintf:
* @buf: the buffer to dump
* @format: the format
* @argptr: the variable list of arguments
*
* Do a formatted print to an XML buffer.
*
* Returns 0 successful, -1 in case of internal or API error.
*/
int
virBufferVSprintf(virBufferPtr buf, const char *format, ...) {
int size, count;
va_list locarg, argptr;
if ((format == NULL) || (buf == NULL)) {
return(-1);
}
size = buf->size - buf->use - 1;
va_start(argptr, format);
va_copy(locarg, argptr);
while (((count = vsnprintf(&buf->content[buf->use], size, format,
locarg)) < 0) || (count >= size - 1)) {
buf->content[buf->use] = 0;
va_end(locarg);
if (virBufferGrow(buf, 1000) < 0) {
return(-1);
}
size = buf->size - buf->use - 1;
va_copy(locarg, argptr);
}
va_end(locarg);
buf->use += count;
buf->content[buf->use] = 0;
return(0);
}
#if 0
/*
* This block of function are now implemented by a xend poll in
* xend_internal.c instead of querying the Xen store, code is kept
* for reference of in case Xend may not be available in the future ...
*/
/**
* virDomainGetXMLDevice:
* @domain: a domain object
* @sub: the xenstore subsection 'vbd', 'vif', ...
* @dev: the xenstrore internal device number
* @name: the value's name
*
* Extract one information the device used by the domain from xensttore
*
* Returns the new string or NULL in case of error
*/
static char *
virDomainGetXMLDeviceInfo(virDomainPtr domain, const char *sub,
long dev, const char *name) {
char s[256];
unsigned int len = 0;
snprintf(s, 255, "/local/domain/0/backend/%s/%d/%ld/%s",
sub, domain->handle, dev, name);
s[255] = 0;
return xs_read(domain->conn->xshandle, 0, &s[0], &len);
}
/**
* virDomainGetXMLDevice:
* @domain: a domain object
* @buf: the output buffer object
* @dev: the xenstrore internal device number
*
* Extract and dump in the buffer informations on the device used by the domain
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
virDomainGetXMLDevice(virDomainPtr domain, virBufferPtr buf, long dev) {
char *type, *val;
type = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "type");
if (type == NULL)
return(-1);
if (!strcmp(type, "file")) {
virBufferVSprintf(buf, " <disk type='file'>\n");
val = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "params");
if (val != NULL) {
virBufferVSprintf(buf, " <source file='%s'/>\n", val);
free(val);
}
val = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "dev");
if (val != NULL) {
virBufferVSprintf(buf, " <target dev='%s'/>\n", val);
free(val);
}
val = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "read-only");
if (val != NULL) {
virBufferVSprintf(buf, " <readonly/>\n", val);
free(val);
}
virBufferAdd(buf, " </disk>\n", 12);
} else if (!strcmp(type, "phy")) {
virBufferVSprintf(buf, " <disk type='device'>\n");
val = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "params");
if (val != NULL) {
virBufferVSprintf(buf, " <source device='%s'/>\n", val);
free(val);
}
val = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "dev");
if (val != NULL) {
virBufferVSprintf(buf, " <target dev='%s'/>\n", val);
free(val);
}
val = virDomainGetXMLDeviceInfo(domain, "vbd", dev, "read-only");
if (val != NULL) {
virBufferVSprintf(buf, " <readonly/>\n", val);
free(val);
}
virBufferAdd(buf, " </disk>\n", 12);
} else {
TODO
fprintf(stderr, "Don't know how to handle device type %s\n", type);
}
free(type);
return(0);
}
/**
* virDomainGetXMLDevices:
* @domain: a domain object
* @buf: the output buffer object
*
* Extract the devices used by the domain and dumps then in the buffer
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
virDomainGetXMLDevices(virDomainPtr domain, virBufferPtr buf) {
int ret = -1;
unsigned int num, i;
long id;
char **list = NULL, *endptr;
char backend[200];
virConnectPtr conn;
if (!VIR_IS_CONNECTED_DOMAIN(domain))
return(-1);
conn = domain->conn;
snprintf(backend, 199, "/local/domain/0/backend/vbd/%d",
virDomainGetID(domain));
backend[199] = 0;
list = xs_directory(conn->xshandle, 0, backend, &num);
ret = 0;
if (list == NULL)
goto done;
for (i = 0;i < num;i++) {
id = strtol(list[i], &endptr, 10);
if ((endptr == list[i]) || (*endptr != 0)) {
ret = -1;
goto done;
}
virDomainGetXMLDevice(domain, buf, id);
}
done:
if (list != NULL)
free(list);
return(ret);
}
/**
* virDomainGetXMLInterface:
* @domain: a domain object
* @buf: the output buffer object
* @dev: the xenstrore internal device number
*
* Extract and dump in the buffer informations on the interface used by
* the domain
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
virDomainGetXMLInterface(virDomainPtr domain, virBufferPtr buf, long dev) {
char *type, *val;
type = virDomainGetXMLDeviceInfo(domain, "vif", dev, "bridge");
if (type == NULL) {
virBufferVSprintf(buf, " <interface type='default'>\n");
val = virDomainGetXMLDeviceInfo(domain, "vif", dev, "mac");
if (val != NULL) {
virBufferVSprintf(buf, " <mac address='%s'/>\n", val);
free(val);
}
val = virDomainGetXMLDeviceInfo(domain, "vif", dev, "script");
if (val != NULL) {
virBufferVSprintf(buf, " <script path='%s'/>\n", val);
free(val);
}
virBufferAdd(buf, " </interface>\n", 17);
} else {
virBufferVSprintf(buf, " <interface type='bridge'>\n");
virBufferVSprintf(buf, " <source bridge='%s'/>\n", type);
val = virDomainGetXMLDeviceInfo(domain, "vif", dev, "mac");
if (val != NULL) {
virBufferVSprintf(buf, " <mac address='%s'/>\n", val);
free(val);
}
val = virDomainGetXMLDeviceInfo(domain, "vif", dev, "script");
if (val != NULL) {
virBufferVSprintf(buf, " <script path='%s'/>\n", val);
free(val);
}
virBufferAdd(buf, " </interface>\n", 17);
}
free(type);
return(0);
}
/**
* virDomainGetXMLInterfaces:
* @domain: a domain object
* @buf: the output buffer object
*
* Extract the interfaces used by the domain and dumps then in the buffer
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
virDomainGetXMLInterfaces(virDomainPtr domain, virBufferPtr buf) {
int ret = -1;
unsigned int num, i;
long id;
char **list = NULL, *endptr;
char backend[200];
virConnectPtr conn;
if (!VIR_IS_CONNECTED_DOMAIN(domain))
return(-1);
conn = domain->conn;
snprintf(backend, 199, "/local/domain/0/backend/vif/%d",
virDomainGetID(domain));
backend[199] = 0;
list = xs_directory(conn->xshandle, 0, backend, &num);
ret = 0;
if (list == NULL)
goto done;
for (i = 0;i < num;i++) {
id = strtol(list[i], &endptr, 10);
if ((endptr == list[i]) || (*endptr != 0)) {
ret = -1;
goto done;
}
virDomainGetXMLInterface(domain, buf, id);
}
done:
if (list != NULL)
free(list);
return(ret);
}
/**
* virDomainGetXMLBoot:
* @domain: a domain object
* @buf: the output buffer object
*
* Extract the boot informations used to start that domain
*
* Returns 0 in case of success, -1 in case of failure
*/
static int
virDomainGetXMLBoot(virDomainPtr domain, virBufferPtr buf) {
char *vm, *str;
if (!VIR_IS_DOMAIN(domain))
return(-1);
vm = virDomainGetVM(domain);
if (vm == NULL)
return(-1);
virBufferAdd(buf, " <os>\n", 7);
str = virDomainGetVMInfo(domain, vm, "image/ostype");
if (str != NULL) {
virBufferVSprintf(buf, " <type>%s</type>\n", str);
free(str);
}
str = virDomainGetVMInfo(domain, vm, "image/kernel");
if (str != NULL) {
virBufferVSprintf(buf, " <kernel>%s</kernel>\n", str);
free(str);
}
str = virDomainGetVMInfo(domain, vm, "image/ramdisk");
if (str != NULL) {
if (str[0] != 0)
virBufferVSprintf(buf, " <initrd>%s</initrd>\n", str);
free(str);
}
str = virDomainGetVMInfo(domain, vm, "image/cmdline");
if (str != NULL) {
if (str[0] != 0)
virBufferVSprintf(buf, " <cmdline>%s</cmdline>\n", str);
free(str);
}
virBufferAdd(buf, " </os>\n", 8);
free(vm);
return(0);
}
/**
* virDomainGetXMLDesc:
* @domain: a domain object
* @flags: and OR'ed set of extraction flags, not used yet
*
* Provide an XML description of the domain. NOTE: this API is subject
* to changes.
*
* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virDomainGetXMLDesc(virDomainPtr domain, int flags) {
char *ret = NULL;
virBuffer buf;
virDomainInfo info;
if (!VIR_IS_DOMAIN(domain))
return(NULL);
if (flags != 0)
return(NULL);
if (virDomainGetInfo(domain, &info) < 0)
return(NULL);
ret = malloc(1000);
if (ret == NULL)
return(NULL);
buf.content = ret;
buf.size = 1000;
buf.use = 0;
virBufferVSprintf(&buf, "<domain type='xen' id='%d'>\n",
virDomainGetID(domain));
virBufferVSprintf(&buf, " <name>%s</name>\n", virDomainGetName(domain));
virDomainGetXMLBoot(domain, &buf);
virBufferVSprintf(&buf, " <memory>%lu</memory>\n", info.maxMem);
virBufferVSprintf(&buf, " <vcpu>%d</vcpu>\n", (int) info.nrVirtCpu);
virBufferAdd(&buf, " <devices>\n", 12);
virDomainGetXMLDevices(domain, &buf);
virDomainGetXMLInterfaces(domain, &buf);
virBufferAdd(&buf, " </devices>\n", 13);
virBufferAdd(&buf, "</domain>\n", 10);
buf.content[buf.use] = 0;
return(ret);
}
#endif
/**
* virDomainParseXMLOSDesc:
* @xmldesc: string with the XML description
* @buf: a buffer for the result S-Expr
*
* Parse the OS part of the XML description and add it to the S-Expr in buf
* This is a temporary interface as the S-Expr interface
* will be replaced by XML-RPC in the future. However the XML format should
* stay valid over time.
*
* Returns 0 in case of success, -1 in case of error.
*/
static int
virDomainParseXMLOSDesc(xmlNodePtr node, virBufferPtr buf) {
xmlNodePtr cur, txt;
const xmlChar *type = NULL;
const xmlChar *root = NULL;
const xmlChar *kernel = NULL;
const xmlChar *initrd = NULL;
const xmlChar *cmdline = NULL;
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if ((type == NULL) && (xmlStrEqual(cur->name, BAD_CAST "type"))) {
txt = cur->children;
if ((txt->type == XML_TEXT_NODE) && (txt->next == NULL))
type = txt->content;
} else if ((kernel == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "kernel"))) {
txt = cur->children;
if ((txt->type == XML_TEXT_NODE) && (txt->next == NULL))
kernel = txt->content;
} else if ((root == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "root"))) {
txt = cur->children;
if ((txt->type == XML_TEXT_NODE) && (txt->next == NULL))
root = txt->content;
} else if ((initrd == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "initrd"))) {
txt = cur->children;
if ((txt->type == XML_TEXT_NODE) && (txt->next == NULL))
initrd = txt->content;
} else if ((cmdline == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "cmdline"))) {
txt = cur->children;
if ((txt->type == XML_TEXT_NODE) && (txt->next == NULL))
cmdline = txt->content;
}
}
cur = cur->next;
}
if ((type != NULL) && (!xmlStrEqual(type, BAD_CAST "linux"))) {
/* VIR_ERR_OS_TYPE */
virXMLError(VIR_ERR_OS_TYPE, (const char *) type, 0);
return(-1);
}
virBufferAdd(buf, "(linux ", 7);
if (kernel == NULL) {
virXMLError(VIR_ERR_NO_KERNEL, NULL, 0);
return(-1);
}
virBufferVSprintf(buf, "(kernel '%s')", (const char *) kernel);
if (initrd != NULL)
virBufferVSprintf(buf, "(ramdisk '%s')", (const char *) initrd);
if (root == NULL) {
const xmlChar *base, *tmp;
/* need to extract root info from command line */
if (cmdline == NULL) {
virXMLError(VIR_ERR_NO_ROOT, (const char *) cmdline, 0);
return(-1);
}
base = cmdline;
while (*base != 0) {
if ((base[0] == 'r') && (base[1] == 'o') && (base[2] == 'o') &&
(base[3] == 't')) {
base += 4;
break;
}
base++;
}
while ((*base == ' ') || (*base == '\t')) base++;
if (*base == '=') {
base++;
while ((*base == ' ') || (*base == '\t')) base++;
}
tmp = base;
while ((*tmp != 0) && (*tmp != ' ') && (*tmp != '\t')) tmp++;
if (tmp == base) {
virXMLError(VIR_ERR_NO_ROOT, (const char *) cmdline, 0);
return(-1);
}
root = xmlStrndup(base, tmp - base);
virBufferVSprintf(buf, "(root '%s')", (const char *) root);
xmlFree((xmlChar *) root);
virBufferVSprintf(buf, "(args '%s')", (const char *) cmdline);
} else {
virBufferVSprintf(buf, "(root '%s')", (const char *) root);
if (cmdline != NULL)
virBufferVSprintf(buf, "(args '%s')", (const char *) cmdline);
}
virBufferAdd(buf, ")", 1);
return(0);
}
/**
* virDomainParseXMLDiskDesc:
* @xmldesc: string with the XML description
* @buf: a buffer for the result S-Expr
*
* Parse the one disk in the XML description and add it to the S-Expr in buf
* This is a temporary interface as the S-Expr interface
* will be replaced by XML-RPC in the future. However the XML format should
* stay valid over time.
*
* Returns 0 in case of success, -1 in case of error.
*/
static int
virDomainParseXMLDiskDesc(xmlNodePtr node, virBufferPtr buf) {
xmlNodePtr cur;
xmlChar *type = NULL;
xmlChar *source = NULL;
xmlChar *target = NULL;
int ro = 0;
int typ = 0;
type = xmlGetProp(node, BAD_CAST "type");
if (type != NULL) {
if (xmlStrEqual(type, BAD_CAST "file")) typ = 0;
else if (xmlStrEqual(type, BAD_CAST "block")) typ = 1;
xmlFree(type);
}
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if ((source == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "source"))) {
if (typ == 0)
source = xmlGetProp(cur, BAD_CAST "file");
else
source = xmlGetProp(cur, BAD_CAST "dev");
} else if ((target == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "target"))) {
target = xmlGetProp(cur, BAD_CAST "dev");
} else if (xmlStrEqual(cur->name, BAD_CAST "readonly")) {
ro = 1;
}
}
cur = cur->next;
}
if (source == NULL) {
virXMLError(VIR_ERR_NO_SOURCE, (const char *) target, 0);
if (target != NULL)
xmlFree(target);
return(-1);
}
if (target == NULL) {
virXMLError(VIR_ERR_NO_TARGET, (const char *) source, 0);
if (source != NULL)
xmlFree(source);
return(-1);
}
virBufferAdd(buf, "(vbd ", 5);
if (target[0] == '/')
virBufferVSprintf(buf, "(dev '%s')", (const char *) target);
else
virBufferVSprintf(buf, "(dev '/dev/%s')", (const char *) target);
if (typ == 0)
virBufferVSprintf(buf, "(uname 'file:%s')", source);
else if (typ == 1) {
if (source[0] == '/')
virBufferVSprintf(buf, "(uname 'phy:%s')", source);
else
virBufferVSprintf(buf, "(uname 'phy:/dev/%s')", source);
}
if (ro == 0)
virBufferVSprintf(buf, "(mode 'w')");
else if (ro == 1)
virBufferVSprintf(buf, "(mode 'r')");
virBufferAdd(buf, ")", 1);
xmlFree(target);
xmlFree(source);
return(0);
}
/**
* virDomainParseXMLIfDesc:
* @xmldesc: string with the XML description
* @buf: a buffer for the result S-Expr
*
* Parse the one interface the XML description and add it to the S-Expr in buf
* This is a temporary interface as the S-Expr interface
* will be replaced by XML-RPC in the future. However the XML format should
* stay valid over time.
*
* Returns 0 in case of success, -1 in case of error.
*/
static int
virDomainParseXMLIfDesc(xmlNodePtr node, virBufferPtr buf) {
xmlNodePtr cur;
xmlChar *type = NULL;
xmlChar *source = NULL;
xmlChar *mac = NULL;
xmlChar *script = NULL;
int typ = 0;
type = xmlGetProp(node, BAD_CAST "type");
if (type != NULL) {
if (xmlStrEqual(type, BAD_CAST "bridge")) typ = 0;
else if (xmlStrEqual(type, BAD_CAST "ethernet")) typ = 1;
xmlFree(type);
}
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if ((source == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "source"))) {
if (typ == 0)
source = xmlGetProp(cur, BAD_CAST "bridge");
else
source = xmlGetProp(cur, BAD_CAST "dev");
} else if ((mac == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "mac"))) {
mac = xmlGetProp(cur, BAD_CAST "address");
} else if ((script == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "script"))) {
script = xmlGetProp(cur, BAD_CAST "path");
}
}
cur = cur->next;
}
virBufferAdd(buf, "(vif ", 5);
if (mac != NULL)
virBufferVSprintf(buf, "(mac '%s')", (const char *) mac);
if (source != NULL) {
if (typ == 0)
virBufferVSprintf(buf, "(bridge '%s')", (const char *) source);
else /* TODO does that work like that ? */
virBufferVSprintf(buf, "(dev '%s')", (const char *) source);
}
if (script != NULL)
virBufferVSprintf(buf, "(script '%s')", script);
virBufferAdd(buf, ")", 1);
if (mac != NULL)
xmlFree(mac);
if (source != NULL)
xmlFree(source);
if (script != NULL)
xmlFree(script);
return(0);
}
/**
* virDomainParseXMLDesc:
* @xmldesc: string with the XML description
*
* Parse the XML description and turn it into the xend sexp needed to
* create the comain. This is a temporary interface as the S-Expr interface
* will be replaced by XML-RPC in the future. However the XML format should
* stay valid over time.
*
* Returns the 0 terminatedi S-Expr string or NULL in case of error.
* the caller must free() the returned value.
*/
char *
virDomainParseXMLDesc(const char *xmldesc, char **name) {
xmlDocPtr xml = NULL;
xmlNodePtr node;
char *ret = NULL, *nam = NULL;
virBuffer buf;
xmlChar *prop;
xmlXPathObjectPtr obj = NULL;
xmlXPathContextPtr ctxt = NULL;
int i, res;
if (name != NULL)
*name = NULL;
ret = malloc(1000);
if (ret == NULL)
return(NULL);
buf.content = ret;
buf.size = 1000;
buf.use = 0;
xml = xmlReadDoc((const xmlChar *) xmldesc, "domain.xml", NULL,
XML_PARSE_NOENT | XML_PARSE_NONET |
XML_PARSE_NOERROR | XML_PARSE_NOWARNING);
if (xml == NULL) {
goto error;
}
node = xmlDocGetRootElement(xml);
if ((node == NULL) || (!xmlStrEqual(node->name, BAD_CAST "domain")))
goto error;
prop = xmlGetProp(node, BAD_CAST "type");
if (prop != NULL) {
if (!xmlStrEqual(prop, BAD_CAST "xen")) {
xmlFree(prop);
goto error;
}
xmlFree(prop);
}
virBufferAdd(&buf, "(vm ", 4);
ctxt = xmlXPathNewContext(xml);
if (ctxt == NULL) {
goto error;
}
/*
* extract soem of the basics, name, memory, cpus ...
*/
obj = xmlXPathEval(BAD_CAST "string(/domain/name[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
virXMLError(VIR_ERR_NO_NAME, xmldesc, 0);
goto error;
}
virBufferVSprintf(&buf, "(name '%s')", obj->stringval);
nam = strdup((const char *) obj->stringval);
if (nam == NULL) {
virXMLError(VIR_ERR_NO_MEMORY, "copying name", 0);
goto error;
}
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "number(/domain/memory[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_NUMBER) ||
(obj->floatval < 64000)) {
virBufferVSprintf(&buf, "(memory 128)(maxmem 128)");
} else {
unsigned long mem = (obj->floatval / 1024);
virBufferVSprintf(&buf, "(memory %lu)(maxmem %lu)", mem, mem);
}
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "number(/domain/vcpu[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_NUMBER) ||
(obj->floatval <= 0)) {
virBufferVSprintf(&buf, "(vcpus 1)");
} else {
unsigned int cpu = (unsigned int) obj->floatval;
virBufferVSprintf(&buf, "(vcpus %u)", cpu);
}
xmlXPathFreeObject(obj);
/* analyze of the os description */
virBufferAdd(&buf, "(image ", 7);
obj = xmlXPathEval(BAD_CAST "/domain/os[1]", ctxt);
if ((obj == NULL) || (obj->type != XPATH_NODESET) ||
(obj->nodesetval == NULL) ||
(obj->nodesetval->nodeNr != 1)) {
virXMLError(VIR_ERR_NO_OS, nam, 0);
goto error;
}
res = virDomainParseXMLOSDesc(obj->nodesetval->nodeTab[0], &buf);
if (res != 0) {
goto error;
}
xmlXPathFreeObject(obj);
virBufferAdd(&buf, ")", 1);
/* analyze of the devices */
obj = xmlXPathEval(BAD_CAST "/domain/devices/disk", ctxt);
if ((obj == NULL) || (obj->type != XPATH_NODESET) ||
(obj->nodesetval == NULL) ||
(obj->nodesetval->nodeNr < 1)) {
virXMLError(VIR_ERR_NO_DEVICE, nam, 0);
goto error;
}
for (i = 0;i < obj->nodesetval->nodeNr;i++) {
virBufferAdd(&buf, "(device ", 8);
res = virDomainParseXMLDiskDesc(obj->nodesetval->nodeTab[i], &buf);
if (res != 0) {
goto error;
}
virBufferAdd(&buf, ")", 1);
}
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "/domain/devices/interface", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) {
for (i = 0;i < obj->nodesetval->nodeNr;i++) {
virBufferAdd(&buf, "(device ", 8);
res = virDomainParseXMLIfDesc(obj->nodesetval->nodeTab[i], &buf);
if (res != 0) {
goto error;
}
virBufferAdd(&buf, ")", 1);
}
}
xmlXPathFreeObject(obj);
virBufferAdd(&buf, ")", 1); /* closes (vm */
buf.content[buf.use] = 0;
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml);
if (name != NULL)
*name = nam;
return(ret);
error:
if (nam != NULL)
free(nam);
if (name != NULL)
*name = NULL;
if (obj != NULL)
xmlXPathFreeObject(obj);
if (ctxt != NULL)
xmlXPathFreeContext(ctxt);
if (xml != NULL)
xmlFreeDoc(xml);
if (ret != NULL)
free(ret);
return(NULL);
}
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