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Make QEMU migration use cached qemu capabilities data

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* src/qemu/qemu_migration.c, src/qemu/qemu_migration.h: Remove
  qemuCaps parameters & use cached data
* src/qemu/qemu_driver.c: Don't create & pass qemuCaps to
  migration methods
This commit is contained in:
Daniel P. Berrange 2011-05-04 13:12:57 +01:00
parent a623bff450
commit 7c31e1ef0f
3 changed files with 8 additions and 36 deletions
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11
src/qemu/qemu_driver.c
View File

@ -1881,7 +1881,6 @@ static int qemudDomainSaveFlag(struct qemud_driver *driver, virDomainPtr dom,
struct stat sb;
bool is_reg = false;
unsigned long long offset;
virBitmapPtr qemuCaps = NULL;
int fd = -1;
memset(&header, 0, sizeof(header));
@ -1913,11 +1912,6 @@ static int qemudDomainSaveFlag(struct qemud_driver *driver, virDomainPtr dom,
}
}
if (qemuCapsExtractVersionInfo(vm->def->emulator, vm->def->os.arch,
NULL,
&qemuCaps) < 0)
goto endjob;
/* Get XML for the domain */
xml = virDomainDefFormat(vm->def, VIR_DOMAIN_XML_SECURE);
if (!xml) {
@ -2043,7 +2037,7 @@ static int qemudDomainSaveFlag(struct qemud_driver *driver, virDomainPtr dom,
}
/* Perform the migration */
if (qemuMigrationToFile(driver, vm, qemuCaps, fd, offset, path,
if (qemuMigrationToFile(driver, vm, fd, offset, path,
qemuCompressProgramName(compressed),
is_reg, bypassSecurityDriver) < 0)
goto endjob;
@ -2081,7 +2075,6 @@ endjob:
}
cleanup:
qemuCapsFree(qemuCaps);
VIR_FORCE_CLOSE(fd);
VIR_FREE(xml);
if (ret != 0 && is_reg)
@ -2299,7 +2292,7 @@ static int doCoreDump(struct qemud_driver *driver,
goto cleanup;
}
if (qemuMigrationToFile(driver, vm, NULL, fd, 0, path,
if (qemuMigrationToFile(driver, vm, fd, 0, path,
qemuCompressProgramName(compress), true, false) < 0)
goto cleanup;

32
src/qemu/qemu_migration.c
View File

@ -255,7 +255,6 @@ qemuMigrationPrepareTunnel(struct qemud_driver *driver,
int ret = -1;
int internalret;
int dataFD[2] = { -1, -1 };
virBitmapPtr qemuCaps = NULL;
qemuDomainObjPrivatePtr priv = NULL;
struct timeval now;
@ -307,14 +306,6 @@ qemuMigrationPrepareTunnel(struct qemud_driver *driver,
goto endjob;
}
/* check that this qemu version supports the interactive exec */
if (qemuCapsExtractVersionInfo(vm->def->emulator, vm->def->os.arch,
NULL, &qemuCaps) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot determine QEMU argv syntax %s"),
vm->def->emulator);
goto endjob;
}
/* Start the QEMU daemon, with the same command-line arguments plus
* -incoming stdio (which qemu_command might convert to exec:cat or fd:n)
*/
@ -371,7 +362,6 @@ endjob:
}
cleanup:
qemuCapsFree(qemuCaps);
virDomainDefFree(def);
VIR_FORCE_CLOSE(dataFD[0]);
VIR_FORCE_CLOSE(dataFD[1]);
@ -703,7 +693,6 @@ static int doTunnelMigrate(struct qemud_driver *driver,
virStreamPtr st = NULL;
char *unixfile = NULL;
int internalret;
virBitmapPtr qemuCaps = NULL;
int status;
unsigned long long transferred, remaining, total;
unsigned int background_flags = QEMU_MONITOR_MIGRATE_BACKGROUND;
@ -764,16 +753,9 @@ static int doTunnelMigrate(struct qemud_driver *driver,
}
/* check that this qemu version supports the unix migration */
if (qemuCapsExtractVersionInfo(vm->def->emulator, vm->def->os.arch,
NULL, &qemuCaps) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot extract Qemu version from '%s'"),
vm->def->emulator);
goto cleanup;
}
if (!qemuCapsGet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_UNIX) &&
!qemuCapsGet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC)) {
if (!qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATE_QEMU_UNIX) &&
!qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC)) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
"%s", _("Source qemu is too old to support tunnelled migration"));
goto cleanup;
@ -815,11 +797,11 @@ static int doTunnelMigrate(struct qemud_driver *driver,
background_flags |= QEMU_MONITOR_MIGRATE_NON_SHARED_DISK;
if (flags & VIR_MIGRATE_NON_SHARED_INC)
background_flags |= QEMU_MONITOR_MIGRATE_NON_SHARED_INC;
if (qemuCapsGet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_UNIX)) {
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATE_QEMU_UNIX)) {
internalret = qemuMonitorMigrateToUnix(priv->mon, background_flags,
unixfile);
}
else if (qemuCapsGet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC)) {
else if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATE_QEMU_EXEC)) {
const char *args[] = { "nc", "-U", unixfile, NULL };
internalret = qemuMonitorMigrateToCommand(priv->mon, QEMU_MONITOR_MIGRATE_BACKGROUND, args);
} else {
@ -889,7 +871,6 @@ finish:
cleanup:
VIR_FORCE_CLOSE(client_sock);
VIR_FORCE_CLOSE(qemu_sock);
qemuCapsFree(qemuCaps);
if (ddomain)
virUnrefDomain(ddomain);
@ -1289,7 +1270,6 @@ cleanup:
/* Helper function called while driver lock is held and vm is active. */
int
qemuMigrationToFile(struct qemud_driver *driver, virDomainObjPtr vm,
virBitmapPtr qemuCaps,
int fd, off_t offset, const char *path,
const char *compressor,
bool is_reg, bool bypassSecurityDriver)
@ -1302,7 +1282,7 @@ qemuMigrationToFile(struct qemud_driver *driver, virDomainObjPtr vm,
virCommandPtr cmd = NULL;
int pipeFD[2] = { -1, -1 };
if (qemuCaps && qemuCapsGet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_FD) &&
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATE_QEMU_FD) &&
(!compressor || pipe(pipeFD) == 0)) {
/* All right! We can use fd migration, which means that qemu
* doesn't have to open() the file, so while we still have to
@ -1348,7 +1328,7 @@ qemuMigrationToFile(struct qemud_driver *driver, virDomainObjPtr vm,
if (!compressor) {
const char *args[] = { "cat", NULL };
if (qemuCaps && qemuCapsGet(qemuCaps, QEMU_CAPS_MIGRATE_QEMU_FD) &&
if (qemuCapsGet(priv->qemuCaps, QEMU_CAPS_MIGRATE_QEMU_FD) &&
priv->monConfig->type == VIR_DOMAIN_CHR_TYPE_UNIX) {
rc = qemuMonitorMigrateToFd(priv->mon,
QEMU_MONITOR_MIGRATE_BACKGROUND,

1
src/qemu/qemu_migration.h
View File

@ -61,7 +61,6 @@ virDomainPtr qemuMigrationFinish(struct qemud_driver *driver,
int qemuMigrationToFile(struct qemud_driver *driver, virDomainObjPtr vm,
virBitmapPtr qemuCaps,
int fd, off_t offset, const char *path,
const char *compressor,
bool is_reg, bool bypassSecurityDriver)