External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-12-22 21:55:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix save/restore migrate syntax for new KVM releases

Browse Source
This commit is contained in:
Daniel P. Berrange 2009-01-29 17:27:54 +00:00
parent e96d88ff3d
commit 4f4bfbc79e
15 changed files with 194 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
ChangeLog
View File

@ -1,3 +1,25 @@
Thu Jan 29 17:24:22 GMT 2009 Daniel P. Berrange <berrange@redhat.com>
Fix save/restore for new KVM releases
* src/domain_conf.h, src/lxc_driver.c, src/uml_driver.c:
Remove unused stdin_fd field from virDomainObjPtr
* src/qemu_conf.c, src/qemu_driver.c: Support new
migration options for save & restore, and fix deadlock
in save code.
* src/qemu_conf.h: Add more QEMU argv flags to various
migration options & describe existing flags
* src/util.c: Close original stdin file handle after
duping it onto STDIN_FILENO
* tests/qemuxml2argvtest.c: Test for various migrate
syntax options
* tests/qemuxml2argvdata/qemuxml2argv-migrate.args,
tests/qemuxml2argvdata/qemuxml2argv-migrate.xml,
tests/qemuxml2argvdata/qemuxml2argv-restore-v1.args,
tests/qemuxml2argvdata/qemuxml2argv-restore-v1.xml,
tests/qemuxml2argvdata/qemuxml2argv-restore-v2.args,
tests/qemuxml2argvdata/qemuxml2argv-restore-v2.xml: Data
files for testing migrate syntax options
Thu Jan 29 17:15:18 GMT 2009 John Levon <john.levon@sun.com>
* src/libvirt.c: fix another printf("%s", NULL) case

1
src/domain_conf.h
View File

@ -462,7 +462,6 @@ typedef virDomainObj *virDomainObjPtr;
struct _virDomainObj {
virMutex lock;
int stdin_fd;
int monitor;
int monitor_watch;
char *monitorpath;

3
src/lxc_driver.c
View File

@ -775,11 +775,10 @@ static int lxcControllerStart(virConnectPtr conn,
ADD_ARG(NULL);
vm->stdin_fd = -1;
FD_SET(appPty, &keepfd);
if (virExec(conn, largv, NULL, &keepfd, &child,
vm->stdin_fd, &logfd, &logfd,
-1, &logfd, &logfd,
VIR_EXEC_NONE) < 0)
goto cleanup;

48
src/qemu_conf.c
View File

@ -396,6 +396,27 @@ int qemudExtractVersionInfo(const char *qemu,
if (kvm_version >= 74)
flags |= QEMUD_CMD_FLAG_VNET_HDR;
/*
* Handling of -incoming arg with varying features
* -incoming tcp (kvm >= 79)
* -incoming exec (kvm >= 80)
* -incoming stdio (all earlier kvm)
*
* NB, there was a pre-kvm-79 'tcp' support, but it
* was broken, because it blocked the monitor console
* while waiting for data, so pretend it doesn't exist
*
* XXX when next QEMU release after 0.9.1 arrives,
* we'll need to add MIGRATE_QEMU_TCP/EXEC here too
*/
if (kvm_version >= 79) {
flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP;
if (kvm_version >= 80)
flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC;
} else if (kvm_version > 0) {
flags |= QEMUD_CMD_FLAG_MIGRATE_KVM_STDIO;
}
if (retversion)
*retversion = version;
if (retflags)
@ -677,6 +698,33 @@ int qemudBuildCommandLine(virConnectPtr conn,
virUUIDFormat(vm->def->uuid, uuid);
/* Migration is very annoying due to wildly varying syntax & capabilities
* over time of KVM / QEMU codebases
*/
if (migrateFrom) {
if (STRPREFIX(migrateFrom, "tcp")) {
if (!(qemuCmdFlags & QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP)) {
qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SUPPORT,
"%s", _("TCP migration is not supported with this QEMU binary"));
return -1;
}
} else if (STREQ(migrateFrom, "stdio")) {
if (qemuCmdFlags & QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC) {
migrateFrom = "exec:cat";
} else if (!(qemuCmdFlags & QEMUD_CMD_FLAG_MIGRATE_KVM_STDIO)) {
qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SUPPORT,
"%s", _("STDIO migration is not supported with this QEMU binary"));
return -1;
}
} else if (STRPREFIX(migrateFrom, "exec")) {
if (!(qemuCmdFlags & QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC)) {
qemudReportError(conn, NULL, NULL, VIR_ERR_NO_SUPPORT,
"%s", _("STDIO migration is not supported with this QEMU binary"));
return -1;
}
}
}
/* Need to explicitly disable KQEMU if
* 1. Arch matches host arch
* 2. Guest is 'qemu'

20
src/qemu_conf.h
View File

@ -40,15 +40,19 @@
/* Internal flags to keep track of qemu command line capabilities */
enum qemud_cmd_flags {
QEMUD_CMD_FLAG_KQEMU = (1 << 0),
QEMUD_CMD_FLAG_VNC_COLON = (1 << 1),
QEMUD_CMD_FLAG_NO_REBOOT = (1 << 2),
QEMUD_CMD_FLAG_DRIVE = (1 << 3),
QEMUD_CMD_FLAG_DRIVE_BOOT = (1 << 4),
QEMUD_CMD_FLAG_NAME = (1 << 5),
QEMUD_CMD_FLAG_UUID = (1 << 6),
QEMUD_CMD_FLAG_DOMID = (1 << 7), /* Xenner only */
QEMUD_CMD_FLAG_KQEMU = (1 << 0), /* Whether KQEMU is compiled in */
QEMUD_CMD_FLAG_VNC_COLON = (1 << 1), /* Does the VNC take just port, or address + display */
QEMUD_CMD_FLAG_NO_REBOOT = (1 << 2), /* Is the -no-reboot flag available */
QEMUD_CMD_FLAG_DRIVE = (1 << 3), /* Is the new -drive arg available */
QEMUD_CMD_FLAG_DRIVE_BOOT = (1 << 4), /* Does -drive support boot=on */
QEMUD_CMD_FLAG_NAME = (1 << 5), /* Is the -name flag available */
QEMUD_CMD_FLAG_UUID = (1 << 6), /* Is the -uuid flag available */
QEMUD_CMD_FLAG_DOMID = (1 << 7), /* Xenner only, special -domid flag available */
QEMUD_CMD_FLAG_VNET_HDR = (1 << 8),
QEMUD_CMD_FLAG_MIGRATE_KVM_STDIO = (1 << 9), /* Original migration code from KVM. Also had tcp, but we can't use that
* since it had a design bug blocking the entire monitor console */
QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP = (1 << 10), /* New migration syntax after merge to QEMU with TCP transport */
QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC = (1 << 11), /* New migration syntax after merge to QEMU with EXEC transport */
};
/* Main driver state */

33
src/qemu_driver.c
View File

@ -130,7 +130,8 @@ static void qemudDispatchVMEvent(int watch,
static int qemudStartVMDaemon(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr vm,
const char *migrateFrom);
const char *migrateFrom,
int stdin_fd);
static void qemudShutdownVMDaemon(virConnectPtr conn,
struct qemud_driver *driver,
@ -237,7 +238,7 @@ qemudAutostartConfigs(struct qemud_driver *driver) {
virDomainObjLock(vm);
if (vm->autostart &&
!virDomainIsActive(vm)) {
int ret = qemudStartVMDaemon(conn, driver, vm, NULL);
int ret = qemudStartVMDaemon(conn, driver, vm, NULL, -1);
if (ret < 0) {
virErrorPtr err = virGetLastError();
qemudLog(QEMUD_ERR, _("Failed to autostart VM '%s': %s\n"),
@ -1050,7 +1051,8 @@ static virDomainPtr qemudDomainLookupByName(virConnectPtr conn,
static int qemudStartVMDaemon(virConnectPtr conn,
struct qemud_driver *driver,
virDomainObjPtr vm,
const char *migrateFrom) {
const char *migrateFrom,
int stdin_fd) {
const char **argv = NULL, **tmp;
const char **progenv = NULL;
int i, ret;
@ -1161,7 +1163,7 @@ static int qemudStartVMDaemon(virConnectPtr conn,
FD_SET(tapfds[i], &keepfd);
ret = virExec(conn, argv, progenv, &keepfd, &child,
vm->stdin_fd, &vm->logfile, &vm->logfile,
stdin_fd, &vm->logfile, &vm->logfile,
VIR_EXEC_NONBLOCK | VIR_EXEC_DAEMON);
/* wait for qemu process to to show up */
@ -1811,7 +1813,7 @@ static virDomainPtr qemudDomainCreate(virConnectPtr conn, const char *xml,
def = NULL;
if (qemudStartVMDaemon(conn, driver, vm, NULL) < 0) {
if (qemudStartVMDaemon(conn, driver, vm, NULL, -1) < 0) {
virDomainRemoveInactive(&driver->domains,
vm);
vm = NULL;
@ -2287,11 +2289,14 @@ static int qemudDomainSave(virDomainPtr dom,
/* Pause */
if (vm->state == VIR_DOMAIN_RUNNING) {
header.was_running = 1;
if (qemudDomainSuspend(dom) != 0) {
if (qemudMonitorCommand(vm, "stop", &info) < 0) {
qemudReportError(dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("failed to pause domain"));
"%s", _("suspend operation failed"));
goto cleanup;
}
vm->state = VIR_DOMAIN_PAUSED;
qemudDebug("Reply %s", info);
VIR_FREE(info);
}
/* Get XML for the domain */
@ -2678,10 +2683,14 @@ static int qemudDomainRestore(virConnectPtr conn,
vm = virDomainFindByUUID(&driver->domains, def->uuid);
if (!vm)
vm = virDomainFindByName(&driver->domains, def->name);
if (vm && virDomainIsActive(vm)) {
if (vm) {
if (virDomainIsActive(vm)) {
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
_("domain is already active as '%s'"), vm->def->name);
goto cleanup;
} else {
virDomainObjUnlock(vm);
}
}
if (!(vm = virDomainAssignDef(conn,
@ -2694,11 +2703,9 @@ static int qemudDomainRestore(virConnectPtr conn,
def = NULL;
/* Set the migration source and start it up. */
vm->stdin_fd = fd;
ret = qemudStartVMDaemon(conn, driver, vm, "stdio");
ret = qemudStartVMDaemon(conn, driver, vm, "stdio", fd);
close(fd);
fd = -1;
vm->stdin_fd = -1;
if (ret < 0) {
qemudReportError(conn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("failed to start VM"));
@ -2827,7 +2834,7 @@ static int qemudDomainStart(virDomainPtr dom) {
goto cleanup;
}
ret = qemudStartVMDaemon(dom->conn, driver, vm, NULL);
ret = qemudStartVMDaemon(dom->conn, driver, vm, NULL, -1);
if (ret != -1)
event = virDomainEventNewFromObj(vm,
VIR_DOMAIN_EVENT_STARTED,
@ -4141,7 +4148,7 @@ qemudDomainMigratePrepare2 (virConnectPtr dconn,
* -incoming tcp:0.0.0.0:port
*/
snprintf (migrateFrom, sizeof (migrateFrom), "tcp:0.0.0.0:%d", this_port);
if (qemudStartVMDaemon (dconn, driver, vm, migrateFrom) < 0) {
if (qemudStartVMDaemon (dconn, driver, vm, migrateFrom, -1) < 0) {
qemudReportError (dconn, NULL, NULL, VIR_ERR_OPERATION_FAILED,
"%s", _("failed to start listening VM"));
if (!vm->persistent) {

3
src/uml_driver.c
View File

@ -811,13 +811,12 @@ static int umlStartVMDaemon(virConnectPtr conn,
errno, strerror(errno));
vm->monitor = -1;
vm->stdin_fd = -1;
for (i = 0 ; i < ntapfds ; i++)
FD_SET(tapfds[i], &keepfd);
ret = virExec(conn, argv, progenv, &keepfd, &pid,
vm->stdin_fd, &logfd, &logfd,
-1, &logfd, &logfd,
VIR_EXEC_DAEMON);
close(logfd);

2
src/util.c
View File

@ -407,6 +407,8 @@ __virExec(virConnectPtr conn,
_exit(1);
}
if (infd > 0)
close(infd);
close(null);
if (childout > 0)
close(childout);

1
tests/qemuxml2argvdata/qemuxml2argv-migrate.args Normal file
View File

@ -0,0 +1 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu-kvm -S -M pc -m 214 -smp 1 -nographic -monitor pty -pidfile /nowhere/QEMUGuest1.pid -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb -incoming tcp:10.0.0.1:5000

22
tests/qemuxml2argvdata/qemuxml2argv-migrate.xml Normal file
View File

@ -0,0 +1,22 @@
<domain type='qemu'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory>219200</memory>
<currentMemory>219200</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<disk type='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
</disk>
</devices>
</domain>

1
tests/qemuxml2argvdata/qemuxml2argv-restore-v1.args Normal file
View File

@ -0,0 +1 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu-kvm -S -M pc -m 214 -smp 1 -nographic -monitor pty -pidfile /nowhere/QEMUGuest1.pid -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb -incoming stdio

22
tests/qemuxml2argvdata/qemuxml2argv-restore-v1.xml Normal file
View File

@ -0,0 +1,22 @@
<domain type='kvm'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory>219200</memory>
<currentMemory>219200</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<disk type='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
</disk>
</devices>
</domain>

1
tests/qemuxml2argvdata/qemuxml2argv-restore-v2.args Normal file
View File

@ -0,0 +1 @@
LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu-kvm -S -M pc -m 214 -smp 1 -nographic -monitor pty -pidfile /nowhere/QEMUGuest1.pid -no-acpi -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb -incoming exec:cat

22
tests/qemuxml2argvdata/qemuxml2argv-restore-v2.xml Normal file
View File

@ -0,0 +1,22 @@
<domain type='kvm'>
<name>QEMUGuest1</name>
<uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
<memory>219200</memory>
<currentMemory>219200</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<disk type='block' device='disk'>
<source dev='/dev/HostVG/QEMUGuest1'/>
<target dev='hda' bus='ide'/>
</disk>
</devices>
</domain>

20
tests/qemuxml2argvtest.c
View File

@ -24,7 +24,8 @@ static struct qemud_driver driver;
static int testCompareXMLToArgvFiles(const char *xml,
const char *cmd,
int extraFlags) {
int extraFlags,
const char *migrateFrom) {
char argvData[MAX_FILE];
char *expectargv = &(argvData[0]);
char *actualargv = NULL;
@ -56,7 +57,7 @@ static int testCompareXMLToArgvFiles(const char *xml,
if (qemudBuildCommandLine(NULL, &driver,
&vm, flags, &argv, &qenv,
NULL, NULL, NULL) < 0)
NULL, NULL, migrateFrom) < 0)
goto fail;
len = 1; /* for trailing newline */
@ -122,6 +123,7 @@ static int testCompareXMLToArgvFiles(const char *xml,
struct testInfo {
const char *name;
int extraFlags;
const char *migrateFrom;
};
static int testCompareXMLToArgvHelper(const void *data) {
@ -132,7 +134,7 @@ static int testCompareXMLToArgvHelper(const void *data) {
abs_srcdir, info->name);
snprintf(args, PATH_MAX, "%s/qemuxml2argvdata/qemuxml2argv-%s.args",
abs_srcdir, info->name);
return testCompareXMLToArgvFiles(xml, args, info->extraFlags);
return testCompareXMLToArgvFiles(xml, args, info->extraFlags, info->migrateFrom);
}
@ -159,14 +161,17 @@ mymain(int argc, char **argv)
if((driver.stateDir = strdup("/nowhere")) == NULL)
return EXIT_FAILURE;
#define DO_TEST(name, extraFlags) \
#define DO_TEST_FULL(name, extraFlags, migrateFrom) \
do { \
struct testInfo info = { name, extraFlags }; \
const struct testInfo info = { name, extraFlags, migrateFrom }; \
if (virtTestRun("QEMU XML-2-ARGV " name, \
1, testCompareXMLToArgvHelper, &info) < 0) \
ret = -1; \
} while (0)
#define DO_TEST(name, extraFlags) \
DO_TEST_FULL(name, extraFlags, NULL)
setenv("PATH", "/bin", 1);
setenv("USER", "test", 1);
setenv("LOGNAME", "test", 1);
@ -228,6 +233,11 @@ mymain(int argc, char **argv)
DO_TEST("hostdev-pci-address", 0);
DO_TEST_FULL("restore-v1", QEMUD_CMD_FLAG_MIGRATE_KVM_STDIO, "stdio");
DO_TEST_FULL("restore-v2", QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC, "stdio");
DO_TEST_FULL("restore-v2", QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC, "exec:cat");
DO_TEST_FULL("migrate", QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP, "tcp:10.0.0.1:5000");
virCapabilitiesFree(driver.caps);
return(ret==0 ? EXIT_SUCCESS : EXIT_FAILURE);