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libvirt/qemud/conf.c

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/*
* config.c: VM configuration management
*
* Copyright (C) 2006, 2007 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include <dirent.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <sys/utsname.h>
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include <libxml/uri.h>
#include <libvirt/virterror.h>
#include "conf.h"
#include "uuid.h"
#include "../src/buf.h"
#define qemudLog(level, msg...) fprintf(stderr, msg)
void qemudReportError(virConnectPtr conn,
virDomainPtr dom,
virNetworkPtr net,
int code, const char *fmt, ...) {
va_list args;
char errorMessage[QEMUD_MAX_ERROR_LEN];
if (fmt) {
va_start(args, fmt);
vsnprintf(errorMessage, QEMUD_MAX_ERROR_LEN-1, fmt, args);
va_end(args);
} else {
errorMessage[0] = '\0';
}
__virRaiseError(conn, dom, net, VIR_FROM_QEMU, code, VIR_ERR_ERROR,
NULL, NULL, NULL, -1, -1, errorMessage);
}
struct qemud_vm *qemudFindVMByID(const struct qemud_driver *driver, int id) {
struct qemud_vm *vm = driver->vms;
while (vm) {
if (qemudIsActiveVM(vm) && vm->id == id)
return vm;
vm = vm->next;
}
return NULL;
}
struct qemud_vm *qemudFindVMByUUID(const struct qemud_driver *driver,
const unsigned char *uuid) {
struct qemud_vm *vm = driver->vms;
while (vm) {
if (!memcmp(vm->def->uuid, uuid, QEMUD_UUID_RAW_LEN))
return vm;
vm = vm->next;
}
return NULL;
}
struct qemud_vm *qemudFindVMByName(const struct qemud_driver *driver,
const char *name) {
struct qemud_vm *vm = driver->vms;
while (vm) {
if (!strcmp(vm->def->name, name))
return vm;
vm = vm->next;
}
return NULL;
}
struct qemud_network *qemudFindNetworkByUUID(const struct qemud_driver *driver,
const unsigned char *uuid) {
struct qemud_network *network = driver->networks;
while (network) {
if (!memcmp(network->def->uuid, uuid, QEMUD_UUID_RAW_LEN))
return network;
network = network->next;
}
return NULL;
}
struct qemud_network *qemudFindNetworkByName(const struct qemud_driver *driver,
const char *name) {
struct qemud_network *network = driver->networks;
while (network) {
if (!strcmp(network->def->name, name))
return network;
network = network->next;
}
return NULL;
}
/* Free all memory associated with a struct qemud_vm object */
void qemudFreeVMDef(struct qemud_vm_def *def) {
struct qemud_vm_disk_def *disk = def->disks;
struct qemud_vm_net_def *net = def->nets;
while (disk) {
struct qemud_vm_disk_def *prev = disk;
disk = disk->next;
free(prev);
}
while (net) {
struct qemud_vm_net_def *prev = net;
net = net->next;
free(prev);
}
free(def);
}
void qemudFreeVM(struct qemud_vm *vm) {
qemudFreeVMDef(vm->def);
if (vm->newDef)
qemudFreeVMDef(vm->newDef);
free(vm);
}
/* Build up a fully qualfiied path for a config file to be
* associated with a persistent guest or network */
static int
qemudMakeConfigPath(const char *configDir,
const char *name,
const char *ext,
char *buf,
unsigned int buflen) {
if ((strlen(configDir) + 1 + strlen(name) + (ext ? strlen(ext) : 0) + 1) > buflen)
return -1;
strcpy(buf, configDir);
strcat(buf, "/");
strcat(buf, name);
if (ext)
strcat(buf, ext);
return 0;
}
int
qemudEnsureDir(const char *path)
{
struct stat st;
char parent[PATH_MAX];
char *p;
int err;
if (stat(path, &st) >= 0)
return 0;
strncpy(parent, path, PATH_MAX);
parent[PATH_MAX - 1] = '\0';
if (!(p = strrchr(parent, '/')))
return EINVAL;
if (p == parent)
return EPERM;
*p = '\0';
if ((err = qemudEnsureDir(parent)))
return err;
if (mkdir(path, 0777) < 0 && errno != EEXIST)
return errno;
return 0;
}
/* The list of possible machine types for various architectures,
as supported by QEMU - taken from 'qemu -M ?' for each arch */
static const char *arch_info_x86_machines[] = {
"pc", "isapc", NULL
};
static const char *arch_info_mips_machines[] = {
"mips", NULL
};
static const char *arch_info_sparc_machines[] = {
"sun4m", NULL
};
static const char *arch_info_ppc_machines[] = {
"g3bw", "mac99", "prep", NULL
};
/* The archicture tables for supported QEMU archs */
struct qemu_arch_info qemudArchs[] = {
/* i686 must be in position 0 */
{ "i686", 32, arch_info_x86_machines, "qemu" },
/* x86_64 must be in position 1 */
{ "x86_64", 64, arch_info_x86_machines, "qemu-system-x86_64" },
{ "mips", 32, arch_info_mips_machines, "qemu-system-mips" },
{ "mipsel", 32, arch_info_mips_machines, "qemu-system-mipsel" },
{ "sparc", 32, arch_info_sparc_machines, "qemu-system-sparc" },
{ "ppc", 32, arch_info_ppc_machines, "qemu-system-ppc" },
{ NULL, -1, NULL, NULL }
};
/* Return the default architecture if none is explicitly requested*/
static const char *qemudDefaultArch(void) {
return qemudArchs[0].arch;
}
/* Return the default machine type for a given architecture */
static const char *qemudDefaultMachineForArch(const char *arch) {
int i;
for (i = 0; qemudArchs[i].arch; i++) {
if (!strcmp(qemudArchs[i].arch, arch)) {
return qemudArchs[i].machines[0];
}
}
return NULL;
}
/* Return the default binary name for a particular architecture */
static const char *qemudDefaultBinaryForArch(const char *arch) {
int i;
for (i = 0 ; qemudArchs[i].arch; i++) {
if (!strcmp(qemudArchs[i].arch, arch)) {
return qemudArchs[i].binary;
}
}
return NULL;
}
/* Find the fully qualified path to the binary for an architecture */
static char *qemudLocateBinaryForArch(struct qemud_driver *driver ATTRIBUTE_UNUSED,
int virtType, const char *arch) {
const char *name;
char *path;
if (virtType == QEMUD_VIRT_KVM)
name = "qemu-kvm";
else
name = qemudDefaultBinaryForArch(arch);
if (!name) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot determin binary for architecture %s", arch);
return NULL;
}
/* XXX lame. should actually use $PATH ... */
path = malloc(strlen(name) + strlen("/usr/bin/") + 1);
if (!path) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "path");
return NULL;
}
strcpy(path, "/usr/bin/");
strcat(path, name);
return path;
}
static int qemudExtractVersionInfo(const char *qemu, int *version, int *flags) {
pid_t child;
int newstdout[2];
*flags = 0;
*version = 0;
if (pipe(newstdout) < 0) {
return -1;
}
if ((child = fork()) < 0) {
close(newstdout[0]);
close(newstdout[1]);
return -1;
}
if (child == 0) { /* Kid */
if (close(STDIN_FILENO) < 0)
goto cleanup1;
if (close(STDERR_FILENO) < 0)
goto cleanup1;
if (close(newstdout[0]) < 0)
goto cleanup1;
if (dup2(newstdout[1], STDOUT_FILENO) < 0)
goto cleanup1;
/* Just in case QEMU is translated someday.. */
setenv("LANG", "C", 1);
execl(qemu, qemu, (char*)NULL);
cleanup1:
_exit(-1); /* Just in case */
} else { /* Parent */
char help[8192]; /* Ought to be enough to hold QEMU help screen */
int got = 0, ret = -1;
int major, minor, micro;
if (close(newstdout[1]) < 0)
goto cleanup2;
while (got < (sizeof(help)-1)) {
int len;
if ((len = read(newstdout[0], help+got, sizeof(help)-got-1)) <= 0) {
if (!len)
break;
if (errno == EINTR)
continue;
goto cleanup2;
}
got += len;
}
help[got] = '\0';
if (sscanf(help, "QEMU PC emulator version %d.%d.%d", &major,&minor, &micro) != 3) {
goto cleanup2;
}
*version = (major * 1000 * 1000) + (minor * 1000) + micro;
if (strstr(help, "-no-kqemu"))
*flags |= QEMUD_CMD_FLAG_KQEMU;
if (strstr(help, "-no-reboot"))
*flags |= QEMUD_CMD_FLAG_NO_REBOOT;
if (*version >= 9000)
*flags |= QEMUD_CMD_FLAG_VNC_COLON;
ret = 0;
qemudDebug("Version %d %d %d Cooked version: %d, with flags ? %d",
major, minor, micro, *version, *flags);
cleanup2:
if (close(newstdout[0]) < 0)
ret = -1;
rewait:
if (waitpid(child, &got, 0) != child) {
if (errno == EINTR) {
goto rewait;
}
qemudLog(QEMUD_ERR, "Unexpected exit status from qemu %d pid %lu", got, (unsigned long)child);
ret = -1;
}
/* Check & log unexpected exit status, but don't fail,
* as there's really no need to throw an error if we did
* actually read a valid version number above */
if (WEXITSTATUS(got) != 1) {
qemudLog(QEMUD_WARN, "Unexpected exit status '%d', qemu probably failed", got);
}
return ret;
}
}
int qemudExtractVersion(struct qemud_driver *driver) {
char *binary = NULL;
struct stat sb;
if (driver->qemuVersion > 0)
return 0;
if (!(binary = qemudLocateBinaryForArch(driver, QEMUD_VIRT_QEMU, "i686")))
return -1;
if (stat(binary, &sb) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Cannot find QEMU binary %s: %s", binary,
strerror(errno));
free(binary);
return -1;
}
if (qemudExtractVersionInfo(binary, &driver->qemuVersion, &driver->qemuCmdFlags) < 0) {
free(binary);
return -1;
}
free(binary);
return 0;
}
/* Parse the XML definition for a disk */
static struct qemud_vm_disk_def *qemudParseDiskXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
xmlNodePtr node) {
struct qemud_vm_disk_def *disk = calloc(1, sizeof(struct qemud_vm_disk_def));
xmlNodePtr cur;
xmlChar *device = NULL;
xmlChar *source = NULL;
xmlChar *target = NULL;
xmlChar *type = NULL;
int typ = 0;
if (!disk) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "disk");
return NULL;
}
type = xmlGetProp(node, BAD_CAST "type");
if (type != NULL) {
if (xmlStrEqual(type, BAD_CAST "file"))
typ = QEMUD_DISK_FILE;
else if (xmlStrEqual(type, BAD_CAST "block"))
typ = QEMUD_DISK_BLOCK;
else {
typ = QEMUD_DISK_FILE;
}
xmlFree(type);
type = NULL;
}
device = xmlGetProp(node, BAD_CAST "device");
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if ((source == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "source"))) {
if (typ == QEMUD_DISK_FILE)
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")) {
disk->readonly = 1;
}
}
cur = cur->next;
}
if (source == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_SOURCE, target ? "%s" : NULL, target);
goto error;
}
if (target == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_TARGET, source ? "%s" : NULL, source);
goto error;
}
if (device &&
!strcmp((const char *)device, "floppy") &&
strcmp((const char *)target, "fda") &&
strcmp((const char *)target, "fdb")) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid floppy device name: %s", target);
goto error;
}
if (device &&
!strcmp((const char *)device, "cdrom") &&
strcmp((const char *)target, "hdc")) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid cdrom device name: %s", target);
goto error;
}
if (device &&
!strcmp((const char *)device, "cdrom"))
disk->readonly = 1;
if ((!device || !strcmp((const char *)device, "disk")) &&
strcmp((const char *)target, "hda") &&
strcmp((const char *)target, "hdb") &&
strcmp((const char *)target, "hdc") &&
strcmp((const char *)target, "hdd")) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid harddisk device name: %s", target);
goto error;
}
strncpy(disk->src, (const char *)source, NAME_MAX-1);
disk->src[NAME_MAX-1] = '\0';
strncpy(disk->dst, (const char *)target, NAME_MAX-1);
disk->dst[NAME_MAX-1] = '\0';
disk->type = typ;
if (!device)
disk->device = QEMUD_DISK_DISK;
else if (!strcmp((const char *)device, "disk"))
disk->device = QEMUD_DISK_DISK;
else if (!strcmp((const char *)device, "cdrom"))
disk->device = QEMUD_DISK_CDROM;
else if (!strcmp((const char *)device, "floppy"))
disk->device = QEMUD_DISK_FLOPPY;
else {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Invalid device type: %s", device);
goto error;
}
xmlFree(device);
xmlFree(target);
xmlFree(source);
return disk;
error:
if (type)
xmlFree(type);
if (target)
xmlFree(target);
if (source)
xmlFree(source);
if (device)
xmlFree(device);
free(disk);
return NULL;
}
static void qemudRandomMAC(struct qemud_vm_net_def *net) {
net->mac[0] = 0x52;
net->mac[1] = 0x54;
net->mac[2] = 0x00;
net->mac[3] = 1 + (int)(256*(rand()/(RAND_MAX+1.0)));
net->mac[4] = 1 + (int)(256*(rand()/(RAND_MAX+1.0)));
net->mac[5] = 1 + (int)(256*(rand()/(RAND_MAX+1.0)));
}
/* Parse the XML definition for a network interface */
static struct qemud_vm_net_def *qemudParseInterfaceXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
xmlNodePtr node) {
struct qemud_vm_net_def *net = calloc(1, sizeof(struct qemud_vm_net_def));
xmlNodePtr cur;
xmlChar *macaddr = NULL;
xmlChar *type = NULL;
xmlChar *network = NULL;
xmlChar *bridge = NULL;
xmlChar *ifname = NULL;
xmlChar *script = NULL;
xmlChar *address = NULL;
xmlChar *port = NULL;
if (!net) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "net");
return NULL;
}
net->type = QEMUD_NET_USER;
type = xmlGetProp(node, BAD_CAST "type");
if (type != NULL) {
if (xmlStrEqual(type, BAD_CAST "user"))
net->type = QEMUD_NET_USER;
else if (xmlStrEqual(type, BAD_CAST "ethernet"))
net->type = QEMUD_NET_ETHERNET;
else if (xmlStrEqual(type, BAD_CAST "server"))
net->type = QEMUD_NET_SERVER;
else if (xmlStrEqual(type, BAD_CAST "client"))
net->type = QEMUD_NET_CLIENT;
else if (xmlStrEqual(type, BAD_CAST "mcast"))
net->type = QEMUD_NET_MCAST;
else if (xmlStrEqual(type, BAD_CAST "network"))
net->type = QEMUD_NET_NETWORK;
else if (xmlStrEqual(type, BAD_CAST "bridge"))
net->type = QEMUD_NET_BRIDGE;
else
net->type = QEMUD_NET_USER;
xmlFree(type);
type = NULL;
}
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE) {
if ((macaddr == NULL) &&
(xmlStrEqual(cur->name, BAD_CAST "mac"))) {
macaddr = xmlGetProp(cur, BAD_CAST "address");
} else if ((network == NULL) &&
(net->type == QEMUD_NET_NETWORK) &&
(xmlStrEqual(cur->name, BAD_CAST "source"))) {
network = xmlGetProp(cur, BAD_CAST "network");
} else if ((network == NULL) &&
(net->type == QEMUD_NET_BRIDGE) &&
(xmlStrEqual(cur->name, BAD_CAST "source"))) {
bridge = xmlGetProp(cur, BAD_CAST "bridge");
} else if ((network == NULL) &&
((net->type == QEMUD_NET_SERVER) ||
(net->type == QEMUD_NET_CLIENT) ||
(net->type == QEMUD_NET_MCAST)) &&
(xmlStrEqual(cur->name, BAD_CAST "source"))) {
address = xmlGetProp(cur, BAD_CAST "address");
port = xmlGetProp(cur, BAD_CAST "port");
} else if ((ifname == NULL) &&
((net->type == QEMUD_NET_NETWORK) ||
(net->type == QEMUD_NET_ETHERNET) ||
(net->type == QEMUD_NET_BRIDGE)) &&
xmlStrEqual(cur->name, BAD_CAST "target")) {
ifname = xmlGetProp(cur, BAD_CAST "dev");
} else if ((script == NULL) &&
(net->type == QEMUD_NET_ETHERNET) &&
xmlStrEqual(cur->name, BAD_CAST "script")) {
script = xmlGetProp(cur, BAD_CAST "path");
}
}
cur = cur->next;
}
if (macaddr) {
unsigned int mac[6];
sscanf((const char *)macaddr, "%02x:%02x:%02x:%02x:%02x:%02x",
(unsigned int*)&mac[0],
(unsigned int*)&mac[1],
(unsigned int*)&mac[2],
(unsigned int*)&mac[3],
(unsigned int*)&mac[4],
(unsigned int*)&mac[5]);
net->mac[0] = mac[0];
net->mac[1] = mac[1];
net->mac[2] = mac[2];
net->mac[3] = mac[3];
net->mac[4] = mac[4];
net->mac[5] = mac[5];
xmlFree(macaddr);
macaddr = NULL;
} else {
qemudRandomMAC(net);
}
if (net->type == QEMUD_NET_NETWORK) {
int len;
if (network == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"No <source> 'network' attribute specified with <interface type='network'/>");
goto error;
} else if ((len = xmlStrlen(network)) >= (QEMUD_MAX_NAME_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Network name '%s' too long", network);
goto error;
} else {
strncpy(net->dst.network.name, (char *)network, len);
net->dst.network.name[len] = '\0';
}
if (network) {
xmlFree(network);
network = NULL;
}
if (ifname != NULL) {
if ((len = xmlStrlen(ifname)) >= (BR_IFNAME_MAXLEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"TAP interface name '%s' is too long", ifname);
goto error;
} else {
strncpy(net->dst.network.ifname, (char *)ifname, len);
net->dst.network.ifname[len] = '\0';
}
xmlFree(ifname);
ifname = NULL;
}
} else if (net->type == QEMUD_NET_ETHERNET) {
int len;
if (script != NULL) {
if ((len = xmlStrlen(script)) >= (PATH_MAX-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"TAP script path '%s' is too long", script);
goto error;
} else {
strncpy(net->dst.ethernet.script, (char *)script, len);
net->dst.ethernet.script[len] = '\0';
}
xmlFree(script);
script = NULL;
}
if (ifname != NULL) {
if ((len = xmlStrlen(ifname)) >= (BR_IFNAME_MAXLEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"TAP interface name '%s' is too long", ifname);
goto error;
} else {
strncpy(net->dst.ethernet.ifname, (char *)ifname, len);
net->dst.ethernet.ifname[len] = '\0';
}
xmlFree(ifname);
}
} else if (net->type == QEMUD_NET_BRIDGE) {
int len;
if (bridge == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"No <source> 'dev' attribute specified with <interface type='bridge'/>");
goto error;
} else if ((len = xmlStrlen(bridge)) >= (BR_IFNAME_MAXLEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"TAP bridge path '%s' is too long", bridge);
goto error;
} else {
strncpy(net->dst.bridge.brname, (char *)bridge, len);
net->dst.bridge.brname[len] = '\0';
}
xmlFree(bridge);
bridge = NULL;
if (ifname != NULL) {
if ((len = xmlStrlen(ifname)) >= (BR_IFNAME_MAXLEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"TAP interface name '%s' is too long", ifname);
goto error;
} else {
strncpy(net->dst.bridge.ifname, (char *)ifname, len);
net->dst.bridge.ifname[len] = '\0';
}
xmlFree(ifname);
}
} else if (net->type == QEMUD_NET_CLIENT ||
net->type == QEMUD_NET_SERVER ||
net->type == QEMUD_NET_MCAST) {
int len;
char *ret;
if (port == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"No <source> 'port' attribute specified with socket interface");
goto error;
}
if (!(net->dst.socket.port = strtol((char*)port, &ret, 10)) &&
ret == (char*)port) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Cannot parse <source> 'port' attribute with socket interface");
goto error;
}
xmlFree(port);
port = NULL;
if (address == NULL) {
if (net->type == QEMUD_NET_CLIENT ||
net->type == QEMUD_NET_MCAST) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"No <source> 'address' attribute specified with socket interface");
goto error;
}
} else if ((len = xmlStrlen(address)) >= (BR_INET_ADDR_MAXLEN)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"IP address '%s' is too long", address);
goto error;
}
if (address == NULL) {
net->dst.socket.address[0] = '\0';
} else {
strncpy(net->dst.socket.address, (char*)address,len);
net->dst.socket.address[len] = '\0';
}
xmlFree(address);
}
return net;
error:
if (network)
xmlFree(network);
if (address)
xmlFree(address);
if (port)
xmlFree(port);
if (ifname)
xmlFree(ifname);
if (script)
xmlFree(script);
if (bridge)
xmlFree(bridge);
free(net);
return NULL;
}
/*
* Parses a libvirt XML definition of a guest, and populates the
* the qemud_vm struct with matching data about the guests config
*/
static struct qemud_vm_def *qemudParseXML(struct qemud_driver *driver,
xmlDocPtr xml) {
xmlNodePtr root = NULL;
xmlChar *prop = NULL;
xmlXPathContextPtr ctxt = NULL;
xmlXPathObjectPtr obj = NULL;
char *conv = NULL;
int i;
struct qemud_vm_def *def;
if (!(def = calloc(1, sizeof(struct qemud_vm_def)))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "xmlXPathContext");
return NULL;
}
/* Prepare parser / xpath context */
root = xmlDocGetRootElement(xml);
if ((root == NULL) || (!xmlStrEqual(root->name, BAD_CAST "domain"))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "incorrect root element");
goto error;
}
ctxt = xmlXPathNewContext(xml);
if (ctxt == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "xmlXPathContext");
goto error;
}
/* Find out what type of QEMU virtualization to use */
if (!(prop = xmlGetProp(root, BAD_CAST "type"))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "missing domain type attribute");
goto error;
}
if (!strcmp((char *)prop, "qemu"))
def->virtType = QEMUD_VIRT_QEMU;
else if (!strcmp((char *)prop, "kqemu"))
def->virtType = QEMUD_VIRT_KQEMU;
else if (!strcmp((char *)prop, "kvm"))
def->virtType = QEMUD_VIRT_KVM;
else {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "invalid domain type attribute");
goto error;
}
free(prop);
prop = NULL;
/* Extract domain name */
obj = xmlXPathEval(BAD_CAST "string(/domain/name[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_NAME, NULL);
goto error;
}
if (strlen((const char *)obj->stringval) >= (QEMUD_MAX_NAME_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "domain name length too long");
goto error;
}
strcpy(def->name, (const char *)obj->stringval);
xmlXPathFreeObject(obj);
/* Extract domain uuid */
obj = xmlXPathEval(BAD_CAST "string(/domain/uuid[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
int err;
if ((err = virUUIDGenerate(def->uuid))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Failed to generate UUID: %s", strerror(err));
goto error;
}
} else if (virUUIDParse((const char *)obj->stringval, def->uuid) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed uuid element");
goto error;
}
xmlXPathFreeObject(obj);
/* Extract domain memory */
obj = xmlXPathEval(BAD_CAST "string(/domain/memory[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "missing memory element");
goto error;
} else {
conv = NULL;
def->maxmem = strtoll((const char*)obj->stringval, &conv, 10);
if (conv == (const char*)obj->stringval) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed memory information");
goto error;
}
}
if (obj)
xmlXPathFreeObject(obj);
/* Extract domain memory */
obj = xmlXPathEval(BAD_CAST "string(/domain/currentMemory[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
def->memory = def->maxmem;
} else {
conv = NULL;
def->memory = strtoll((const char*)obj->stringval, &conv, 10);
if (def->memory > def->maxmem)
def->memory = def->maxmem;
if (conv == (const char*)obj->stringval) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed memory information");
goto error;
}
}
if (obj)
xmlXPathFreeObject(obj);
/* Extract domain vcpu info */
obj = xmlXPathEval(BAD_CAST "string(/domain/vcpu[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
def->vcpus = 1;
} else {
conv = NULL;
def->vcpus = strtoll((const char*)obj->stringval, &conv, 10);
if (conv == (const char*)obj->stringval) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed vcpu information");
goto error;
}
}
if (obj)
xmlXPathFreeObject(obj);
/* See if ACPI feature is requested */
obj = xmlXPathEval(BAD_CAST "/domain/features/acpi", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr == 1)) {
def->features |= QEMUD_FEATURE_ACPI;
}
xmlXPathFreeObject(obj);
/* See if we disable reboots */
obj = xmlXPathEval(BAD_CAST "string(/domain/on_reboot)", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
def->noReboot = 0;
} else {
if (!strcmp((char*)obj->stringval, "destroy"))
def->noReboot = 1;
else
def->noReboot = 0;
}
if (obj)
xmlXPathFreeObject(obj);
/* Extract OS type info */
obj = xmlXPathEval(BAD_CAST "string(/domain/os/type[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_OS_TYPE, NULL);
goto error;
}
if (strcmp((const char *)obj->stringval, "hvm")) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_OS_TYPE, "%s", obj->stringval);
goto error;
}
strcpy(def->os.type, (const char *)obj->stringval);
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "string(/domain/os/type[1]/@arch)", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
const char *defaultArch = qemudDefaultArch();
if (strlen(defaultArch) >= (QEMUD_OS_TYPE_MAX_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "architecture type too long");
goto error;
}
strcpy(def->os.arch, defaultArch);
} else {
if (strlen((const char *)obj->stringval) >= (QEMUD_OS_TYPE_MAX_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "architecture type too long");
goto error;
}
strcpy(def->os.arch, (const char *)obj->stringval);
}
if (obj)
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "string(/domain/os/type[1]/@machine)", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
const char *defaultMachine = qemudDefaultMachineForArch(def->os.arch);
if (strlen(defaultMachine) >= (QEMUD_OS_MACHINE_MAX_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "machine type too long");
goto error;
}
strcpy(def->os.machine, defaultMachine);
} else {
if (strlen((const char *)obj->stringval) >= (QEMUD_OS_MACHINE_MAX_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "architecture type too long");
goto error;
}
strcpy(def->os.machine, (const char *)obj->stringval);
}
if (obj)
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "string(/domain/os/kernel[1])", ctxt);
if ((obj != NULL) && (obj->type == XPATH_STRING) &&
(obj->stringval != NULL) && (obj->stringval[0] != 0)) {
if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "kernel path too long");
goto error;
}
strcpy(def->os.kernel, (const char *)obj->stringval);
}
if (obj)
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "string(/domain/os/initrd[1])", ctxt);
if ((obj != NULL) && (obj->type == XPATH_STRING) &&
(obj->stringval != NULL) && (obj->stringval[0] != 0)) {
if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "initrd path too long");
goto error;
}
strcpy(def->os.initrd, (const char *)obj->stringval);
}
if (obj)
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "string(/domain/os/cmdline[1])", ctxt);
if ((obj != NULL) && (obj->type == XPATH_STRING) &&
(obj->stringval != NULL) && (obj->stringval[0] != 0)) {
if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "cmdline arguments too long");
goto error;
}
strcpy(def->os.cmdline, (const char *)obj->stringval);
}
if (obj)
xmlXPathFreeObject(obj);
/* analysis of the disk devices */
obj = xmlXPathEval(BAD_CAST "/domain/os/boot", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) {
for (i = 0; i < obj->nodesetval->nodeNr && i < QEMUD_MAX_BOOT_DEVS ; i++) {
if (!(prop = xmlGetProp(obj->nodesetval->nodeTab[i], BAD_CAST "dev")))
continue;
if (!strcmp((char *)prop, "hd")) {
def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_DISK;
} else if (!strcmp((char *)prop, "fd")) {
def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_FLOPPY;
} else if (!strcmp((char *)prop, "cdrom")) {
def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_CDROM;
} else if (!strcmp((char *)prop, "net")) {
def->os.bootDevs[def->os.nBootDevs++] = QEMUD_BOOT_NET;
} else {
xmlFree(prop);
goto error;
}
xmlFree(prop);
prop = NULL;
}
}
xmlXPathFreeObject(obj);
if (def->os.nBootDevs == 0) {
def->os.nBootDevs = 1;
def->os.bootDevs[0] = QEMUD_BOOT_DISK;
}
obj = xmlXPathEval(BAD_CAST "string(/domain/devices/emulator[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
char *tmp = qemudLocateBinaryForArch(driver, def->virtType, def->os.arch);
if (!tmp) {
goto error;
}
strcpy(def->os.binary, tmp);
free(tmp);
} else {
if (strlen((const char *)obj->stringval) >= (PATH_MAX-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "emulator path too long");
goto error;
}
strcpy(def->os.binary, (const char *)obj->stringval);
}
if (obj)
xmlXPathFreeObject(obj);
obj = xmlXPathEval(BAD_CAST "/domain/devices/graphics", ctxt);
if ((obj == NULL) || (obj->type != XPATH_NODESET) ||
(obj->nodesetval == NULL) || (obj->nodesetval->nodeNr == 0)) {
def->graphicsType = QEMUD_GRAPHICS_NONE;
} else if ((prop = xmlGetProp(obj->nodesetval->nodeTab[0], BAD_CAST "type"))) {
if (!strcmp((char *)prop, "vnc")) {
def->graphicsType = QEMUD_GRAPHICS_VNC;
prop = xmlGetProp(obj->nodesetval->nodeTab[0], BAD_CAST "port");
if (prop) {
conv = NULL;
def->vncPort = strtoll((const char*)prop, &conv, 10);
} else {
def->vncPort = -1;
}
} else if (!strcmp((char *)prop, "sdl")) {
def->graphicsType = QEMUD_GRAPHICS_SDL;
} else {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "Unsupported graphics type %s", prop);
goto error;
}
xmlFree(prop);
prop = NULL;
}
xmlXPathFreeObject(obj);
/* analysis of the disk devices */
obj = xmlXPathEval(BAD_CAST "/domain/devices/disk", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) {
struct qemud_vm_disk_def *prev = NULL;
for (i = 0; i < obj->nodesetval->nodeNr; i++) {
struct qemud_vm_disk_def *disk;
if (!(disk = qemudParseDiskXML(driver, obj->nodesetval->nodeTab[i]))) {
goto error;
}
def->ndisks++;
disk->next = NULL;
if (i == 0) {
def->disks = disk;
} else {
prev->next = disk;
}
prev = disk;
}
}
xmlXPathFreeObject(obj);
/* analysis of the network devices */
obj = xmlXPathEval(BAD_CAST "/domain/devices/interface", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr >= 0)) {
struct qemud_vm_net_def *prev = NULL;
for (i = 0; i < obj->nodesetval->nodeNr; i++) {
struct qemud_vm_net_def *net;
if (!(net = qemudParseInterfaceXML(driver, obj->nodesetval->nodeTab[i]))) {
goto error;
}
def->nnets++;
net->next = NULL;
if (i == 0) {
def->nets = net;
} else {
prev->next = net;
}
prev = net;
}
}
xmlXPathFreeObject(obj);
xmlXPathFreeContext(ctxt);
return def;
error:
if (prop)
free(prop);
if (obj)
xmlXPathFreeObject(obj);
if (ctxt)
xmlXPathFreeContext(ctxt);
qemudFreeVMDef(def);
return NULL;
}
static char *
qemudNetworkIfaceConnect(struct qemud_driver *driver,
struct qemud_vm *vm,
struct qemud_vm_net_def *net,
int vlan)
{
struct qemud_network *network = NULL;
char *brname;
char *ifname;
char tapfdstr[4+3+32+7];
char *retval = NULL;
int err;
int tapfd = -1;
int *tapfds;
if (net->type == QEMUD_NET_NETWORK) {
if (!(network = qemudFindNetworkByName(driver, net->dst.network.name))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Network '%s' not found", net->dst.network.name);
goto error;
} else if (network->bridge[0] == '\0') {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Network '%s' not active", net->dst.network.name);
goto error;
}
brname = network->bridge;
if (net->dst.network.ifname[0] == '\0' ||
strchr(net->dst.network.ifname, '%')) {
strcpy(net->dst.network.ifname, "vnet%d");
}
ifname = net->dst.network.ifname;
} else if (net->type == QEMUD_NET_BRIDGE) {
brname = net->dst.bridge.brname;
if (net->dst.bridge.ifname[0] == '\0' ||
strchr(net->dst.bridge.ifname, '%')) {
strcpy(net->dst.bridge.ifname, "vnet%d");
}
ifname = net->dst.bridge.ifname;
} else {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Network type %d is not supported", net->type);
goto error;
}
if (!driver->brctl && (err = brInit(&driver->brctl))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot initialize bridge support: %s", strerror(err));
goto error;
}
if ((err = brAddTap(driver->brctl, brname,
ifname, BR_IFNAME_MAXLEN, &tapfd))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Failed to add tap interface '%s' to bridge '%s' : %s",
ifname, brname, strerror(err));
goto error;
}
snprintf(tapfdstr, sizeof(tapfdstr), "tap,fd=%d,script=,vlan=%d", tapfd, vlan);
if (!(retval = strdup(tapfdstr)))
goto no_memory;
if (!(tapfds = realloc(vm->tapfds, sizeof(int) * (vm->ntapfds+2))))
goto no_memory;
vm->tapfds = tapfds;
vm->tapfds[vm->ntapfds++] = tapfd;
vm->tapfds[vm->ntapfds] = -1;
return retval;
no_memory:
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "tapfds");
error:
if (retval)
free(retval);
if (tapfd != -1)
close(tapfd);
return NULL;
}
/*
* Constructs a argv suitable for launching qemu with config defined
* for a given virtual machine.
*/
int qemudBuildCommandLine(struct qemud_driver *driver,
struct qemud_vm *vm,
char ***argv) {
int len, n = -1, i;
char memory[50];
char vcpus[50];
char boot[QEMUD_MAX_BOOT_DEVS+1];
struct stat sb;
struct qemud_vm_disk_def *disk = vm->def->disks;
struct qemud_vm_net_def *net = vm->def->nets;
struct utsname ut;
int disableKQEMU = 0;
if (qemudExtractVersion(driver) < 0)
return -1;
uname(&ut);
/* Nasty hack make i?86 look like i686 to simplify next comparison */
if (ut.machine[0] == 'i' &&
ut.machine[2] == '8' &&
ut.machine[3] == '6' &&
!ut.machine[4])
ut.machine[1] = '6';
/* Need to explicitly disable KQEMU if
* 1. Arch matches host arch
* 2. Guest is 'qemu'
* 3. The qemu binary has the -no-kqemu flag
*/
if ((driver->qemuCmdFlags & QEMUD_CMD_FLAG_KQEMU) &&
!strcmp(ut.machine, vm->def->os.arch) &&
vm->def->virtType == QEMUD_VIRT_QEMU)
disableKQEMU = 1;
/* Make sure the binary we are about to try exec'ing exists.
* Technically we could catch the exec() failure, but that's
* in a sub-process so its hard to feed back a useful error
*/
if (stat(vm->def->os.binary, &sb) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Cannot find QEMU binary %s: %s", vm->def->os.binary,
strerror(errno));
return -1;
}
len = 1 + /* qemu */
2 + /* machine type */
disableKQEMU + /* Disable kqemu */
2 * vm->def->ndisks + /* disks*/
(vm->def->nnets > 0 ? (4 * vm->def->nnets) : 2) + /* networks */
2 + /* memory*/
2 + /* cpus */
2 + /* boot device */
2 + /* monitor */
(driver->qemuCmdFlags & QEMUD_CMD_FLAG_NO_REBOOT &&
vm->def->noReboot ? 1 : 0) + /* no-reboot */
(vm->def->features & QEMUD_FEATURE_ACPI ? 0 : 1) + /* acpi */
(vm->def->os.kernel[0] ? 2 : 0) + /* kernel */
(vm->def->os.initrd[0] ? 2 : 0) + /* initrd */
(vm->def->os.cmdline[0] ? 2 : 0) + /* cmdline */
(vm->def->graphicsType == QEMUD_GRAPHICS_VNC ? 2 :
(vm->def->graphicsType == QEMUD_GRAPHICS_SDL ? 0 : 1)); /* graphics */
snprintf(memory, sizeof(memory), "%d", vm->def->memory/1024);
snprintf(vcpus, sizeof(vcpus), "%d", vm->def->vcpus);
if (!(*argv = malloc(sizeof(char *) * (len+1))))
goto no_memory;
if (!((*argv)[++n] = strdup(vm->def->os.binary)))
goto no_memory;
if (!((*argv)[++n] = strdup("-M")))
goto no_memory;
if (!((*argv)[++n] = strdup(vm->def->os.machine)))
goto no_memory;
if (disableKQEMU) {
if (!((*argv)[++n] = strdup("-no-kqemu")))
goto no_memory;
}
if (!((*argv)[++n] = strdup("-m")))
goto no_memory;
if (!((*argv)[++n] = strdup(memory)))
goto no_memory;
if (!((*argv)[++n] = strdup("-smp")))
goto no_memory;
if (!((*argv)[++n] = strdup(vcpus)))
goto no_memory;
if (!((*argv)[++n] = strdup("-monitor")))
goto no_memory;
if (!((*argv)[++n] = strdup("pty")))
goto no_memory;
if (driver->qemuCmdFlags & QEMUD_CMD_FLAG_NO_REBOOT &&
vm->def->noReboot) {
if (!((*argv)[++n] = strdup("-no-reboot")))
goto no_memory;
}
if (!(vm->def->features & QEMUD_FEATURE_ACPI)) {
if (!((*argv)[++n] = strdup("-no-acpi")))
goto no_memory;
}
for (i = 0 ; i < vm->def->os.nBootDevs ; i++) {
switch (vm->def->os.bootDevs[i]) {
case QEMUD_BOOT_CDROM:
boot[i] = 'd';
break;
case QEMUD_BOOT_FLOPPY:
boot[i] = 'a';
break;
case QEMUD_BOOT_DISK:
boot[i] = 'c';
break;
case QEMUD_BOOT_NET:
boot[i] = 'n';
break;
default:
boot[i] = 'c';
break;
}
}
boot[vm->def->os.nBootDevs] = '\0';
if (!((*argv)[++n] = strdup("-boot")))
goto no_memory;
if (!((*argv)[++n] = strdup(boot)))
goto no_memory;
if (vm->def->os.kernel[0]) {
if (!((*argv)[++n] = strdup("-kernel")))
goto no_memory;
if (!((*argv)[++n] = strdup(vm->def->os.kernel)))
goto no_memory;
}
if (vm->def->os.initrd[0]) {
if (!((*argv)[++n] = strdup("-initrd")))
goto no_memory;
if (!((*argv)[++n] = strdup(vm->def->os.initrd)))
goto no_memory;
}
if (vm->def->os.cmdline[0]) {
if (!((*argv)[++n] = strdup("-append")))
goto no_memory;
if (!((*argv)[++n] = strdup(vm->def->os.cmdline)))
goto no_memory;
}
while (disk) {
char dev[NAME_MAX];
char file[PATH_MAX];
if (!strcmp(disk->dst, "hdc") &&
disk->device == QEMUD_DISK_CDROM)
snprintf(dev, NAME_MAX, "-%s", "cdrom");
else
snprintf(dev, NAME_MAX, "-%s", disk->dst);
snprintf(file, PATH_MAX, "%s", disk->src);
if (!((*argv)[++n] = strdup(dev)))
goto no_memory;
if (!((*argv)[++n] = strdup(file)))
goto no_memory;
disk = disk->next;
}
if (!net) {
if (!((*argv)[++n] = strdup("-net")))
goto no_memory;
if (!((*argv)[++n] = strdup("none")))
goto no_memory;
} else {
int vlan = 0;
while (net) {
char nic[100];
if (snprintf(nic, sizeof(nic), "nic,macaddr=%02x:%02x:%02x:%02x:%02x:%02x,vlan=%d",
net->mac[0], net->mac[1],
net->mac[2], net->mac[3],
net->mac[4], net->mac[5],
vlan) >= sizeof(nic))
goto error;
if (!((*argv)[++n] = strdup("-net")))
goto no_memory;
if (!((*argv)[++n] = strdup(nic)))
goto no_memory;
if (!((*argv)[++n] = strdup("-net")))
goto no_memory;
switch (net->type) {
case QEMUD_NET_NETWORK:
case QEMUD_NET_BRIDGE:
if (!((*argv)[++n] = qemudNetworkIfaceConnect(driver, vm, net, vlan)))
goto error;
break;
case QEMUD_NET_ETHERNET:
{
char arg[PATH_MAX];
if (snprintf(arg, PATH_MAX-1, "tap,ifname=%s,script=%s,vlan=%d",
net->dst.ethernet.ifname,
net->dst.ethernet.script,
vlan) >= (PATH_MAX-1))
goto error;
if (!((*argv)[++n] = strdup(arg)))
goto no_memory;
}
break;
case QEMUD_NET_CLIENT:
case QEMUD_NET_SERVER:
case QEMUD_NET_MCAST:
{
char arg[PATH_MAX];
const char *mode = NULL;
switch (net->type) {
case QEMUD_NET_CLIENT:
mode = "connect";
break;
case QEMUD_NET_SERVER:
mode = "listen";
break;
case QEMUD_NET_MCAST:
mode = "mcast";
break;
}
if (snprintf(arg, PATH_MAX-1, "socket,%s=%s:%d,vlan=%d",
mode,
net->dst.socket.address,
net->dst.socket.port,
vlan) >= (PATH_MAX-1))
goto error;
if (!((*argv)[++n] = strdup(arg)))
goto no_memory;
}
break;
case QEMUD_NET_USER:
default:
{
char arg[PATH_MAX];
if (snprintf(arg, PATH_MAX-1, "user,vlan=%d", vlan) >= (PATH_MAX-1))
goto error;
if (!((*argv)[++n] = strdup(arg)))
goto no_memory;
}
}
net = net->next;
vlan++;
}
}
if (vm->def->graphicsType == QEMUD_GRAPHICS_VNC) {
char port[10];
int ret;
ret = snprintf(port, sizeof(port),
((driver->qemuCmdFlags & QEMUD_CMD_FLAG_VNC_COLON) ?
":%d" : "%d"),
vm->def->vncActivePort - 5900);
if (ret < 0 || ret >= (int)sizeof(port))
goto error;
if (!((*argv)[++n] = strdup("-vnc")))
goto no_memory;
if (!((*argv)[++n] = strdup(port)))
goto no_memory;
} else if (vm->def->graphicsType == QEMUD_GRAPHICS_NONE) {
if (!((*argv)[++n] = strdup("-nographic")))
goto no_memory;
} else {
/* SDL is the default. no args needed */
}
(*argv)[++n] = NULL;
return 0;
no_memory:
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "argv");
error:
if (vm->tapfds) {
for (i = 0; vm->tapfds[i] != -1; i++)
close(vm->tapfds[i]);
free(vm->tapfds);
vm->tapfds = NULL;
vm->ntapfds = 0;
}
if (argv) {
for (i = 0 ; i < n ; i++)
free((*argv)[i]);
free(*argv);
}
return -1;
}
/* Save a guest's config data into a persistent file */
static int qemudSaveConfig(struct qemud_driver *driver,
struct qemud_vm *vm,
struct qemud_vm_def *def) {
char *xml;
int fd = -1, ret = -1;
int towrite;
if (!(xml = qemudGenerateXML(driver, vm, def, 0)))
return -1;
if ((fd = open(vm->configFile,
O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR )) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot create config file %s: %s",
vm->configFile, strerror(errno));
goto cleanup;
}
towrite = strlen(xml);
if (write(fd, xml, towrite) != towrite) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot write config file %s: %s",
vm->configFile, strerror(errno));
goto cleanup;
}
if (close(fd) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot save config file %s: %s",
vm->configFile, strerror(errno));
goto cleanup;
}
ret = 0;
cleanup:
if (fd != -1)
close(fd);
free(xml);
return ret;
}
struct qemud_vm_def *
qemudParseVMDef(struct qemud_driver *driver,
const char *xmlStr,
const char *displayName) {
xmlDocPtr xml;
struct qemud_vm_def *def = NULL;
if (!(xml = xmlReadDoc(BAD_CAST xmlStr, displayName ? displayName : "domain.xml", NULL,
XML_PARSE_NOENT | XML_PARSE_NONET |
XML_PARSE_NOERROR | XML_PARSE_NOWARNING))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_XML_ERROR, NULL);
return NULL;
}
def = qemudParseXML(driver, xml);
xmlFreeDoc(xml);
return def;
}
struct qemud_vm *
qemudAssignVMDef(struct qemud_driver *driver,
struct qemud_vm_def *def)
{
struct qemud_vm *vm = NULL;
if ((vm = qemudFindVMByName(driver, def->name))) {
if (!qemudIsActiveVM(vm)) {
qemudFreeVMDef(vm->def);
vm->def = def;
} else {
if (vm->newDef)
qemudFreeVMDef(vm->newDef);
vm->newDef = def;
}
return vm;
}
if (!(vm = calloc(1, sizeof(struct qemud_vm)))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "vm");
return NULL;
}
vm->stdout = -1;
vm->stderr = -1;
vm->monitor = -1;
vm->pid = -1;
vm->id = -1;
vm->state = VIR_DOMAIN_SHUTOFF;
vm->def = def;
vm->next = driver->vms;
driver->vms = vm;
driver->ninactivevms++;
return vm;
}
void
qemudRemoveInactiveVM(struct qemud_driver *driver,
struct qemud_vm *vm)
{
struct qemud_vm *prev = NULL, *curr;
curr = driver->vms;
while (curr != vm) {
prev = curr;
curr = curr->next;
}
if (curr) {
if (prev)
prev->next = curr->next;
else
driver->vms = curr->next;
driver->ninactivevms--;
}
qemudFreeVM(vm);
}
int
qemudSaveVMDef(struct qemud_driver *driver,
struct qemud_vm *vm,
struct qemud_vm_def *def) {
if (vm->configFile[0] == '\0') {
int err;
if ((err = qemudEnsureDir(driver->configDir))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot create config directory %s: %s",
driver->configDir, strerror(err));
return -1;
}
if (qemudMakeConfigPath(driver->configDir, def->name, ".xml",
vm->configFile, PATH_MAX) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot construct config file path");
return -1;
}
if (qemudMakeConfigPath(driver->autostartDir, def->name, ".xml",
vm->autostartLink, PATH_MAX) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot construct autostart link path");
vm->configFile[0] = '\0';
return -1;
}
}
return qemudSaveConfig(driver, vm, def);
}
static int qemudSaveNetworkConfig(struct qemud_driver *driver,
struct qemud_network *network,
struct qemud_network_def *def) {
char *xml;
int fd, ret = -1;
int towrite;
int err;
if (!(xml = qemudGenerateNetworkXML(driver, network, def))) {
return -1;
}
if ((err = qemudEnsureDir(driver->networkConfigDir))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot create config directory %s: %s",
driver->networkConfigDir, strerror(err));
goto cleanup;
}
if ((fd = open(network->configFile,
O_WRONLY | O_CREAT | O_TRUNC,
S_IRUSR | S_IWUSR )) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot create config file %s: %s",
network->configFile, strerror(errno));
goto cleanup;
}
towrite = strlen(xml);
if (write(fd, xml, towrite) != towrite) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot write config file %s: %s",
network->configFile, strerror(errno));
goto cleanup;
}
if (close(fd) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot save config file %s: %s",
network->configFile, strerror(errno));
goto cleanup;
}
ret = 0;
cleanup:
free(xml);
return ret;
}
void qemudFreeNetworkDef(struct qemud_network_def *def) {
struct qemud_dhcp_range_def *range = def->ranges;
while (range) {
struct qemud_dhcp_range_def *next = range->next;
free(range);
range = next;
}
free(def);
}
void qemudFreeNetwork(struct qemud_network *network) {
qemudFreeNetworkDef(network->def);
if (network->newDef)
qemudFreeNetworkDef(network->newDef);
free(network);
}
static int qemudParseBridgeXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
struct qemud_network_def *def,
xmlNodePtr node) {
xmlChar *name, *stp, *delay;
name = xmlGetProp(node, BAD_CAST "name");
if (name != NULL) {
strncpy(def->bridge, (const char *)name, IF_NAMESIZE-1);
def->bridge[IF_NAMESIZE-1] = '\0';
xmlFree(name);
name = NULL;
}
stp = xmlGetProp(node, BAD_CAST "stp");
if (stp != NULL) {
if (xmlStrEqual(stp, BAD_CAST "off")) {
def->disableSTP = 1;
}
xmlFree(stp);
stp = NULL;
}
delay = xmlGetProp(node, BAD_CAST "delay");
if (delay != NULL) {
def->forwardDelay = strtol((const char *)delay, NULL, 10);
xmlFree(delay);
delay = NULL;
}
return 1;
}
static int qemudParseDhcpRangesXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
struct qemud_network_def *def,
xmlNodePtr node) {
xmlNodePtr cur;
cur = node->children;
while (cur != NULL) {
struct qemud_dhcp_range_def *range;
xmlChar *start, *end;
if (cur->type != XML_ELEMENT_NODE ||
!xmlStrEqual(cur->name, BAD_CAST "range")) {
cur = cur->next;
continue;
}
if (!(range = calloc(1, sizeof(struct qemud_dhcp_range_def)))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "range");
return 0;
}
start = xmlGetProp(cur, BAD_CAST "start");
end = xmlGetProp(cur, BAD_CAST "end");
if (start && start[0] && end && end[0]) {
strncpy(range->start, (const char *)start, BR_INET_ADDR_MAXLEN-1);
range->start[BR_INET_ADDR_MAXLEN-1] = '\0';
strncpy(range->end, (const char *)end, BR_INET_ADDR_MAXLEN-1);
range->end[BR_INET_ADDR_MAXLEN-1] = '\0';
range->next = def->ranges;
def->ranges = range;
def->nranges++;
} else {
free(range);
}
if (start)
xmlFree(start);
if (end)
xmlFree(end);
cur = cur->next;
}
return 1;
}
static int qemudParseInetXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
struct qemud_network_def *def,
xmlNodePtr node) {
xmlChar *address, *netmask;
xmlNodePtr cur;
address = xmlGetProp(node, BAD_CAST "address");
if (address != NULL) {
strncpy(def->ipAddress, (const char *)address, BR_INET_ADDR_MAXLEN-1);
def->ipAddress[BR_INET_ADDR_MAXLEN-1] = '\0';
xmlFree(address);
address = NULL;
}
netmask = xmlGetProp(node, BAD_CAST "netmask");
if (netmask != NULL) {
strncpy(def->netmask, (const char *)netmask, BR_INET_ADDR_MAXLEN-1);
def->netmask[BR_INET_ADDR_MAXLEN-1] = '\0';
xmlFree(netmask);
netmask = NULL;
}
if (def->ipAddress[0] && def->netmask[0]) {
struct in_addr inaddress, innetmask;
char *netaddr;
inet_aton((const char*)def->ipAddress, &inaddress);
inet_aton((const char*)def->netmask, &innetmask);
inaddress.s_addr &= innetmask.s_addr;
netaddr = inet_ntoa(inaddress);
snprintf(def->network,sizeof(def->network)-1,
"%s/%s", netaddr, (const char *)def->netmask);
}
cur = node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE &&
xmlStrEqual(cur->name, BAD_CAST "dhcp") &&
!qemudParseDhcpRangesXML(driver, def, cur))
return 0;
cur = cur->next;
}
return 1;
}
static struct qemud_network_def *qemudParseNetworkXML(struct qemud_driver *driver,
xmlDocPtr xml) {
xmlNodePtr root = NULL;
xmlXPathContextPtr ctxt = NULL;
xmlXPathObjectPtr obj = NULL, tmp = NULL;
struct qemud_network_def *def;
if (!(def = calloc(1, sizeof(struct qemud_network_def)))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "network_def");
return NULL;
}
/* Prepare parser / xpath context */
root = xmlDocGetRootElement(xml);
if ((root == NULL) || (!xmlStrEqual(root->name, BAD_CAST "network"))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "incorrect root element");
goto error;
}
ctxt = xmlXPathNewContext(xml);
if (ctxt == NULL) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "xmlXPathContext");
goto error;
}
/* Extract network name */
obj = xmlXPathEval(BAD_CAST "string(/network/name[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_NAME, NULL);
goto error;
}
if (strlen((const char *)obj->stringval) >= (QEMUD_MAX_NAME_LEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "network name length too long");
goto error;
}
strcpy(def->name, (const char *)obj->stringval);
xmlXPathFreeObject(obj);
/* Extract network uuid */
obj = xmlXPathEval(BAD_CAST "string(/network/uuid[1])", ctxt);
if ((obj == NULL) || (obj->type != XPATH_STRING) ||
(obj->stringval == NULL) || (obj->stringval[0] == 0)) {
int err;
if ((err = virUUIDGenerate(def->uuid))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Failed to generate UUID: %s", strerror(err));
goto error;
}
} else if (virUUIDParse((const char *)obj->stringval, def->uuid) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "%s", "malformed uuid element");
goto error;
}
xmlXPathFreeObject(obj);
/* Parse bridge information */
obj = xmlXPathEval(BAD_CAST "/network/bridge[1]", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr > 0)) {
if (!qemudParseBridgeXML(driver, def, obj->nodesetval->nodeTab[0])) {
goto error;
}
}
xmlXPathFreeObject(obj);
/* Parse IP information */
obj = xmlXPathEval(BAD_CAST "/network/ip[1]", ctxt);
if ((obj != NULL) && (obj->type == XPATH_NODESET) &&
(obj->nodesetval != NULL) && (obj->nodesetval->nodeNr > 0)) {
if (!qemudParseInetXML(driver, def, obj->nodesetval->nodeTab[0])) {
goto error;
}
}
xmlXPathFreeObject(obj);
/* IPv4 forwarding setup */
obj = xmlXPathEval(BAD_CAST "count(/network/forward) > 0", ctxt);
if ((obj != NULL) && (obj->type == XPATH_BOOLEAN) &&
obj->boolval) {
if (!def->ipAddress[0] ||
!def->netmask[0]) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"Forwarding requested, but no IPv4 address/netmask provided");
goto error;
}
def->forward = 1;
tmp = xmlXPathEval(BAD_CAST "string(/network/forward[1]/@dev)", ctxt);
if ((tmp != NULL) && (tmp->type == XPATH_STRING) &&
(tmp->stringval != NULL) && (tmp->stringval[0] != 0)) {
int len;
if ((len = xmlStrlen(tmp->stringval)) >= (BR_IFNAME_MAXLEN-1)) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"forward device name '%s' is too long",
(char*)tmp->stringval);
goto error;
}
strcpy(def->forwardDev, (char*)tmp->stringval);
} else {
def->forwardDev[0] = '\0';
}
xmlXPathFreeObject(tmp);
tmp = NULL;
} else {
def->forward = 0;
}
xmlXPathFreeObject(obj);
xmlXPathFreeContext(ctxt);
return def;
error:
/* XXX free all the stuff in the qemud_network struct, or leave it upto
the caller ? */
if (obj)
xmlXPathFreeObject(obj);
if (tmp)
xmlXPathFreeObject(tmp);
if (ctxt)
xmlXPathFreeContext(ctxt);
qemudFreeNetworkDef(def);
return NULL;
}
struct qemud_network_def *
qemudParseNetworkDef(struct qemud_driver *driver,
const char *xmlStr,
const char *displayName) {
xmlDocPtr xml;
struct qemud_network_def *def;
if (!(xml = xmlReadDoc(BAD_CAST xmlStr, displayName ? displayName : "network.xml", NULL,
XML_PARSE_NOENT | XML_PARSE_NONET |
XML_PARSE_NOERROR | XML_PARSE_NOWARNING))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_XML_ERROR, NULL);
return NULL;
}
def = qemudParseNetworkXML(driver, xml);
xmlFreeDoc(xml);
return def;
}
struct qemud_network *
qemudAssignNetworkDef(struct qemud_driver *driver,
struct qemud_network_def *def) {
struct qemud_network *network;
if ((network = qemudFindNetworkByName(driver, def->name))) {
if (!qemudIsActiveNetwork(network)) {
qemudFreeNetworkDef(network->def);
network->def = def;
} else {
if (network->newDef)
qemudFreeNetworkDef(network->newDef);
network->newDef = def;
}
return network;
}
if (!(network = calloc(1, sizeof(struct qemud_network)))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "network");
return NULL;
}
network->def = def;
network->next = driver->networks;
driver->networks = network;
driver->ninactivenetworks++;
return network;
}
void
qemudRemoveInactiveNetwork(struct qemud_driver *driver,
struct qemud_network *network)
{
struct qemud_network *prev = NULL, *curr;
curr = driver->networks;
while (curr != network) {
prev = curr;
curr = curr->next;
}
if (curr) {
if (prev)
prev->next = curr->next;
else
driver->networks = curr->next;
driver->ninactivenetworks--;
}
qemudFreeNetwork(network);
}
int
qemudSaveNetworkDef(struct qemud_driver *driver,
struct qemud_network *network,
struct qemud_network_def *def) {
if (network->configFile[0] == '\0') {
int err;
if ((err = qemudEnsureDir(driver->networkConfigDir))) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot create config directory %s: %s",
driver->networkConfigDir, strerror(err));
return -1;
}
if (qemudMakeConfigPath(driver->networkConfigDir, def->name, ".xml",
network->configFile, PATH_MAX) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot construct config file path");
return -1;
}
if (qemudMakeConfigPath(driver->networkAutostartDir, def->name, ".xml",
network->autostartLink, PATH_MAX) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
"cannot construct autostart link path");
network->configFile[0] = '\0';
return -1;
}
}
return qemudSaveNetworkConfig(driver, network, def);
}
static int
qemudReadFile(const char *path,
char *buf,
int maxlen) {
FILE *fh;
struct stat st;
int ret = 0;
if (!(fh = fopen(path, "r"))) {
qemudLog(QEMUD_WARN, "Failed to open file '%s': %s",
path, strerror(errno));
goto error;
}
if (fstat(fileno(fh), &st) < 0) {
qemudLog(QEMUD_WARN, "Failed to stat file '%s': %s",
path, strerror(errno));
goto error;
}
if (S_ISDIR(st.st_mode)) {
qemudDebug("Ignoring directory '%s' - clearly not a config file", path);
goto error;
}
if (st.st_size >= maxlen) {
qemudLog(QEMUD_WARN, "File '%s' is too large", path);
goto error;
}
if ((ret = fread(buf, st.st_size, 1, fh)) != 1) {
qemudLog(QEMUD_WARN, "Failed to read config file '%s': %s",
path, strerror(errno));
goto error;
}
buf[st.st_size] = '\0';
ret = 1;
error:
if (fh)
fclose(fh);
return ret;
}
static int
compareFileToNameSuffix(const char *file,
const char *name,
const char *suffix) {
int filelen = strlen(file);
int namelen = strlen(name);
int suffixlen = strlen(suffix);
if (filelen == (namelen + suffixlen) &&
!strncmp(file, name, namelen) &&
!strncmp(file + namelen, suffix, suffixlen))
return 1;
else
return 0;
}
static int
hasSuffix(const char *str,
const char *suffix)
{
int len = strlen(str);
int suffixlen = strlen(suffix);
if (len < suffixlen)
return 0;
return strcmp(str + len - suffixlen, suffix) == 0;
}
static int
checkLinkPointsTo(const char *checkLink,
const char *checkDest)
{
char dest[PATH_MAX];
char real[PATH_MAX];
char checkReal[PATH_MAX];
int n;
int passed = 0;
/* read the link destination */
if ((n = readlink(checkLink, dest, PATH_MAX)) < 0) {
switch (errno) {
case ENOENT:
case ENOTDIR:
break;
case EINVAL:
qemudLog(QEMUD_WARN, "Autostart file '%s' is not a symlink",
checkLink);
break;
default:
qemudLog(QEMUD_WARN, "Failed to read autostart symlink '%s': %s",
checkLink, strerror(errno));
break;
}
goto failed;
} else if (n >= PATH_MAX) {
qemudLog(QEMUD_WARN, "Symlink '%s' contents too long to fit in buffer",
checkLink);
goto failed;
}
dest[n] = '\0';
/* make absolute */
if (dest[0] != '/') {
char dir[PATH_MAX];
char tmp[PATH_MAX];
char *p;
strncpy(dir, checkLink, PATH_MAX);
dir[PATH_MAX] = '\0';
if (!(p = strrchr(dir, '/'))) {
qemudLog(QEMUD_WARN, "Symlink path '%s' is not absolute", checkLink);
goto failed;
}
if (p == dir) /* handle unlikely root dir case */
p++;
*p = '\0';
if (qemudMakeConfigPath(dir, dest, NULL, tmp, PATH_MAX) < 0) {
qemudLog(QEMUD_WARN, "Path '%s/%s' is too long", dir, dest);
goto failed;
}
strncpy(dest, tmp, PATH_MAX);
dest[PATH_MAX] = '\0';
}
/* canonicalize both paths */
if (!realpath(dest, real)) {
qemudLog(QEMUD_WARN, "Failed to expand path '%s' :%s",
dest, strerror(errno));
strncpy(real, dest, PATH_MAX);
real[PATH_MAX] = '\0';
}
if (!realpath(checkDest, checkReal)) {
qemudLog(QEMUD_WARN, "Failed to expand path '%s' :%s",
checkDest, strerror(errno));
strncpy(checkReal, checkDest, PATH_MAX);
checkReal[PATH_MAX] = '\0';
}
/* compare */
if (strcmp(checkReal, real) != 0) {
qemudLog(QEMUD_WARN, "Autostart link '%s' is not a symlink to '%s', ignoring",
checkLink, checkReal);
goto failed;
}
passed = 1;
failed:
return passed;
}
static struct qemud_vm *
qemudLoadConfig(struct qemud_driver *driver,
const char *file,
const char *path,
const char *xml,
const char *autostartLink) {
struct qemud_vm_def *def;
struct qemud_vm *vm;
if (!(def = qemudParseVMDef(driver, xml, file))) {
virErrorPtr err = virGetLastError();
qemudLog(QEMUD_WARN, "Error parsing QEMU guest config '%s' : %s",
path, err->message);
return NULL;
}
if (!compareFileToNameSuffix(file, def->name, ".xml")) {
qemudLog(QEMUD_WARN, "QEMU guest config filename '%s' does not match guest name '%s'",
path, def->name);
qemudFreeVMDef(def);
return NULL;
}
if (!(vm = qemudAssignVMDef(driver, def))) {
qemudLog(QEMUD_WARN, "Failed to load QEMU guest config '%s': out of memory", path);
qemudFreeVMDef(def);
return NULL;
}
strncpy(vm->configFile, path, PATH_MAX);
vm->configFile[PATH_MAX-1] = '\0';
strncpy(vm->autostartLink, autostartLink, PATH_MAX);
vm->autostartLink[PATH_MAX-1] = '\0';
vm->autostart = checkLinkPointsTo(vm->autostartLink, vm->configFile);
return vm;
}
static struct qemud_network *
qemudLoadNetworkConfig(struct qemud_driver *driver,
const char *file,
const char *path,
const char *xml,
const char *autostartLink) {
struct qemud_network_def *def;
struct qemud_network *network;
if (!(def = qemudParseNetworkDef(driver, xml, file))) {
virErrorPtr err = virGetLastError();
qemudLog(QEMUD_WARN, "Error parsing network config '%s' : %s",
path, err->message);
return NULL;
}
if (!compareFileToNameSuffix(file, def->name, ".xml")) {
qemudLog(QEMUD_WARN, "Network config filename '%s' does not match network name '%s'",
path, def->name);
qemudFreeNetworkDef(def);
return NULL;
}
if (!(network = qemudAssignNetworkDef(driver, def))) {
qemudLog(QEMUD_WARN, "Failed to load network config '%s': out of memory", path);
qemudFreeNetworkDef(def);
return NULL;
}
strncpy(network->configFile, path, PATH_MAX);
network->configFile[PATH_MAX-1] = '\0';
strncpy(network->autostartLink, autostartLink, PATH_MAX);
network->autostartLink[PATH_MAX-1] = '\0';
network->autostart = checkLinkPointsTo(network->autostartLink, network->configFile);
return network;
}
static
int qemudScanConfigDir(struct qemud_driver *driver,
const char *configDir,
const char *autostartDir,
int isGuest) {
DIR *dir;
struct dirent *entry;
if (!(dir = opendir(configDir))) {
if (errno == ENOENT)
return 0;
qemudLog(QEMUD_ERR, "Failed to open dir '%s': %s",
configDir, strerror(errno));
return -1;
}
while ((entry = readdir(dir))) {
char xml[QEMUD_MAX_XML_LEN];
char path[PATH_MAX];
char autostartLink[PATH_MAX];
if (entry->d_name[0] == '.')
continue;
if (!hasSuffix(entry->d_name, ".xml"))
continue;
if (qemudMakeConfigPath(configDir, entry->d_name, NULL, path, PATH_MAX) < 0) {
qemudLog(QEMUD_WARN, "Config filename '%s/%s' is too long",
configDir, entry->d_name);
continue;
}
if (qemudMakeConfigPath(autostartDir, entry->d_name, NULL, autostartLink, PATH_MAX) < 0) {
qemudLog(QEMUD_WARN, "Autostart link path '%s/%s' is too long",
autostartDir, entry->d_name);
continue;
}
if (!qemudReadFile(path, xml, QEMUD_MAX_XML_LEN))
continue;
if (isGuest)
qemudLoadConfig(driver, entry->d_name, path, xml, autostartLink);
else
qemudLoadNetworkConfig(driver, entry->d_name, path, xml, autostartLink);
}
closedir(dir);
return 0;
}
/* Scan for all guest and network config files */
int qemudScanConfigs(struct qemud_driver *driver) {
if (qemudScanConfigDir(driver, driver->configDir, driver->autostartDir, 1) < 0)
return -1;
if (qemudScanConfigDir(driver, driver->networkConfigDir, driver->networkAutostartDir, 0) < 0)
return -1;
return 0;
}
/* Generate an XML document describing the guest's configuration */
char *qemudGenerateXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
struct qemud_vm *vm,
struct qemud_vm_def *def,
int live) {
virBufferPtr buf = 0;
unsigned char *uuid;
struct qemud_vm_disk_def *disk;
struct qemud_vm_net_def *net;
const char *type = NULL;
int n;
buf = virBufferNew (QEMUD_MAX_XML_LEN);
if (!buf)
goto no_memory;
switch (def->virtType) {
case QEMUD_VIRT_QEMU:
type = "qemu";
break;
case QEMUD_VIRT_KQEMU:
type = "kqemu";
break;
case QEMUD_VIRT_KVM:
type = "kvm";
break;
}
if (!type) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "unexpected domain type %d", def->virtType);
goto cleanup;
}
if (qemudIsActiveVM(vm) && live) {
if (virBufferVSprintf(buf, "<domain type='%s' id='%d'>\n", type, vm->id) < 0)
goto no_memory;
} else {
if (virBufferVSprintf(buf, "<domain type='%s'>\n", type) < 0)
goto no_memory;
}
if (virBufferVSprintf(buf, " <name>%s</name>\n", def->name) < 0)
goto no_memory;
uuid = def->uuid;
if (virBufferVSprintf(buf, " <uuid>%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x</uuid>\n",
uuid[0], uuid[1], uuid[2], uuid[3],
uuid[4], uuid[5], uuid[6], uuid[7],
uuid[8], uuid[9], uuid[10], uuid[11],
uuid[12], uuid[13], uuid[14], uuid[15]) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <memory>%d</memory>\n", def->maxmem) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <currentMemory>%d</currentMemory>\n", def->memory) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <vcpu>%d</vcpu>\n", def->vcpus) < 0)
goto no_memory;
if (virBufferAdd(buf, " <os>\n", -1) < 0)
goto no_memory;
if (def->virtType == QEMUD_VIRT_QEMU) {
if (virBufferVSprintf(buf, " <type arch='%s' machine='%s'>%s</type>\n",
def->os.arch, def->os.machine, def->os.type) < 0)
goto no_memory;
} else {
if (virBufferVSprintf(buf, " <type>%s</type>\n", def->os.type) < 0)
goto no_memory;
}
if (def->os.kernel[0])
if (virBufferVSprintf(buf, " <kernel>%s</kernel>\n", def->os.kernel) < 0)
goto no_memory;
if (def->os.initrd[0])
if (virBufferVSprintf(buf, " <initrd>%s</initrd>\n", def->os.initrd) < 0)
goto no_memory;
if (def->os.cmdline[0])
if (virBufferVSprintf(buf, " <cmdline>%s</cmdline>\n", def->os.cmdline) < 0)
goto no_memory;
for (n = 0 ; n < def->os.nBootDevs ; n++) {
const char *boottype = "hd";
switch (def->os.bootDevs[n]) {
case QEMUD_BOOT_FLOPPY:
boottype = "fd";
break;
case QEMUD_BOOT_DISK:
boottype = "hd";
break;
case QEMUD_BOOT_CDROM:
boottype = "cdrom";
break;
case QEMUD_BOOT_NET:
boottype = "net";
break;
}
if (virBufferVSprintf(buf, " <boot dev='%s'/>\n", boottype) < 0)
goto no_memory;
}
if (virBufferAdd(buf, " </os>\n", -1) < 0)
goto no_memory;
if (def->features & QEMUD_FEATURE_ACPI) {
if (virBufferAdd(buf, " <features>\n", -1) < 0)
goto no_memory;
if (virBufferAdd(buf, " <acpi/>\n", -1) < 0)
goto no_memory;
if (virBufferAdd(buf, " </features>\n", -1) < 0)
goto no_memory;
}
if (virBufferAdd(buf, " <on_poweroff>destroy</on_poweroff>\n", -1) < 0)
goto no_memory;
if (def->noReboot) {
if (virBufferAdd(buf, " <on_reboot>destroy</on_reboot>\n", -1) < 0)
goto no_memory;
} else {
if (virBufferAdd(buf, " <on_reboot>restart</on_reboot>\n", -1) < 0)
goto no_memory;
}
if (virBufferAdd(buf, " <on_crash>destroy</on_crash>\n", -1) < 0)
goto no_memory;
if (virBufferAdd(buf, " <devices>\n", -1) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <emulator>%s</emulator>\n", def->os.binary) < 0)
goto no_memory;
disk = def->disks;
while (disk) {
const char *types[] = {
"block",
"file",
};
const char *typeAttrs[] = {
"dev",
"file",
};
const char *devices[] = {
"disk",
"cdrom",
"floppy",
};
if (virBufferVSprintf(buf, " <disk type='%s' device='%s'>\n",
types[disk->type], devices[disk->device]) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <source %s='%s'/>\n", typeAttrs[disk->type], disk->src) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <target dev='%s'/>\n", disk->dst) < 0)
goto no_memory;
if (disk->readonly)
if (virBufferAdd(buf, " <readonly/>\n", -1) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " </disk>\n") < 0)
goto no_memory;
disk = disk->next;
}
net = def->nets;
while (net) {
const char *types[] = {
"user",
"ethernet",
"server",
"client",
"mcast",
"network",
"bridge",
};
if (virBufferVSprintf(buf, " <interface type='%s'>\n",
types[net->type]) < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <mac address='%02x:%02x:%02x:%02x:%02x:%02x'/>\n",
net->mac[0], net->mac[1], net->mac[2],
net->mac[3], net->mac[4], net->mac[5]) < 0)
goto no_memory;
switch (net->type) {
case QEMUD_NET_NETWORK:
if (virBufferVSprintf(buf, " <source network='%s'/>\n", net->dst.network.name) < 0)
goto no_memory;
if (net->dst.network.ifname[0] != '\0') {
if (virBufferVSprintf(buf, " <target dev='%s'/>\n", net->dst.network.ifname) < 0)
goto no_memory;
}
break;
case QEMUD_NET_ETHERNET:
if (net->dst.ethernet.ifname[0] != '\0') {
if (virBufferVSprintf(buf, " <target dev='%s'/>\n", net->dst.ethernet.ifname) < 0)
goto no_memory;
}
if (net->dst.ethernet.script[0] != '\0') {
if (virBufferVSprintf(buf, " <script path='%s'/>\n", net->dst.ethernet.script) < 0)
goto no_memory;
}
break;
case QEMUD_NET_BRIDGE:
if (virBufferVSprintf(buf, " <source bridge='%s'/>\n", net->dst.bridge.brname) < 0)
goto no_memory;
if (net->dst.bridge.ifname[0] != '\0') {
if (virBufferVSprintf(buf, " <target dev='%s'/>\n", net->dst.bridge.ifname) < 0)
goto no_memory;
}
break;
case QEMUD_NET_SERVER:
case QEMUD_NET_CLIENT:
case QEMUD_NET_MCAST:
if (net->dst.socket.address[0] != '\0') {
if (virBufferVSprintf(buf, " <source address='%s' port='%d'/>\n",
net->dst.socket.address, net->dst.socket.port) < 0)
goto no_memory;
} else {
if (virBufferVSprintf(buf, " <source port='%d'/>\n",
net->dst.socket.port) < 0)
goto no_memory;
}
}
if (virBufferVSprintf(buf, " </interface>\n") < 0)
goto no_memory;
net = net->next;
}
switch (def->graphicsType) {
case QEMUD_GRAPHICS_VNC:
if (virBufferAdd(buf, " <graphics type='vnc'", -1) < 0)
goto no_memory;
if (def->vncPort &&
virBufferVSprintf(buf, " port='%d'",
qemudIsActiveVM(vm) && live ? def->vncActivePort : def->vncPort) < 0)
goto no_memory;
if (virBufferAdd(buf, "/>\n", -1) < 0)
goto no_memory;
break;
case QEMUD_GRAPHICS_SDL:
if (virBufferAdd(buf, " <graphics type='sdl'/>\n", -1) < 0)
goto no_memory;
break;
case QEMUD_GRAPHICS_NONE:
default:
break;
}
if (def->graphicsType == QEMUD_GRAPHICS_VNC) {
}
if (virBufferAdd(buf, " </devices>\n", -1) < 0)
goto no_memory;
if (virBufferAdd(buf, "</domain>\n", -1) < 0)
goto no_memory;
return virBufferContentAndFree (buf);
no_memory:
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "xml");
cleanup:
if (buf) virBufferFree (buf);
return NULL;
}
char *qemudGenerateNetworkXML(struct qemud_driver *driver ATTRIBUTE_UNUSED,
struct qemud_network *network,
struct qemud_network_def *def) {
virBufferPtr buf = 0;
unsigned char *uuid;
buf = virBufferNew (QEMUD_MAX_XML_LEN);
if (!buf)
goto no_memory;
if (virBufferVSprintf(buf, "<network>\n") < 0)
goto no_memory;
if (virBufferVSprintf(buf, " <name>%s</name>\n", def->name) < 0)
goto no_memory;
uuid = def->uuid;
if (virBufferVSprintf(buf, " <uuid>%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x</uuid>\n",
uuid[0], uuid[1], uuid[2], uuid[3],
uuid[4], uuid[5], uuid[6], uuid[7],
uuid[8], uuid[9], uuid[10], uuid[11],
uuid[12], uuid[13], uuid[14], uuid[15]) < 0)
goto no_memory;
if (def->forward) {
if (def->forwardDev[0]) {
virBufferVSprintf(buf, " <forward dev='%s'/>\n",
def->forwardDev);
} else {
virBufferAdd(buf, " <forward/>\n", -1);
}
}
virBufferAdd(buf, " <bridge", -1);
if (qemudIsActiveNetwork(network)) {
if (virBufferVSprintf(buf, " name='%s'", network->bridge) < 0)
goto no_memory;
} else if (def->bridge[0]) {
if (virBufferVSprintf(buf, " name='%s'", def->bridge) < 0)
goto no_memory;
}
if (virBufferVSprintf(buf, " stp='%s' forwardDelay='%d' />\n",
def->disableSTP ? "off" : "on",
def->forwardDelay) < 0)
goto no_memory;
if (def->ipAddress[0] || def->netmask[0]) {
if (virBufferAdd(buf, " <ip", -1) < 0)
goto no_memory;
if (def->ipAddress[0] &&
virBufferVSprintf(buf, " address='%s'", def->ipAddress) < 0)
goto no_memory;
if (def->netmask[0] &&
virBufferVSprintf(buf, " netmask='%s'", def->netmask) < 0)
goto no_memory;
if (virBufferAdd(buf, ">\n", -1) < 0)
goto no_memory;
if (def->ranges) {
struct qemud_dhcp_range_def *range = def->ranges;
if (virBufferAdd(buf, " <dhcp>\n", -1) < 0)
goto no_memory;
while (range) {
if (virBufferVSprintf(buf, " <range start='%s' end='%s' />\n",
range->start, range->end) < 0)
goto no_memory;
range = range->next;
}
if (virBufferAdd(buf, " </dhcp>\n", -1) < 0)
goto no_memory;
}
if (virBufferAdd(buf, " </ip>\n", -1) < 0)
goto no_memory;
}
if (virBufferAdd(buf, "</network>\n", -1) < 0)
goto no_memory;
return virBufferContentAndFree (buf);
no_memory:
qemudReportError(NULL, NULL, NULL, VIR_ERR_NO_MEMORY, "xml");
if (buf) virBufferFree (buf);
return NULL;
}
int qemudDeleteConfig(struct qemud_driver *driver ATTRIBUTE_UNUSED,
const char *configFile,
const char *name) {
if (!configFile[0]) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "no config file for %s", name);
return -1;
}
if (unlink(configFile) < 0) {
qemudReportError(NULL, NULL, NULL, VIR_ERR_INTERNAL_ERROR, "cannot remove config for %s", name);
return -1;
}
return 0;
}
/*
* Local variables:
* indent-tabs-mode: nil
* c-indent-level: 4
* c-basic-offset: 4
* tab-width: 4
* End:
*/
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