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libxl: Add helper function for running the hook script

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The same pattern of retrieving the domXML, running the hook script, and
checking for error is used throughout the libxl driver. Remove some
repetitive code by adding a helper function to perform these tasks.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Jim Fehlig 2021-06-29 18:11:29 -06:00
parent fc94e5c1c2
commit 0d1ccad240
4 changed files with 58 additions and 93 deletions
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102
src/libxl/libxl_domain.c
View File

@ -853,6 +853,25 @@ libxlNetworkUnwindDevices(virDomainDef *def)
}
}
int
libxlDomainHookRun(libxlDriverPrivate *driver,
virDomainDef *def,
unsigned int def_fmtflags,
int hookop,
int hooksubop,
char **output)
{
g_autofree char *xml = NULL;
if (!virHookPresent(VIR_HOOK_DRIVER_LIBXL))
return 0;
xml = virDomainDefFormat(def, driver->xmlopt, def_fmtflags);
return virHookCall(VIR_HOOK_DRIVER_LIBXL, def->name,
hookop, hooksubop,
NULL, xml, output);
}
/*
* Internal domain destroy function.
*
@ -903,16 +922,10 @@ libxlDomainCleanup(libxlDriverPrivate *driver,
hostdev_flags |= VIR_HOSTDEV_SP_USB;
/* now that we know it's stopped call the hook if present */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL)) {
char *xml = virDomainDefFormat(vm->def, driver->xmlopt, 0);
/* we can't stop the operation even if the script raised an error */
ignore_value(virHookCall(VIR_HOOK_DRIVER_LIBXL, vm->def->name,
VIR_HOOK_LIBXL_OP_STOPPED, VIR_HOOK_SUBOP_END,
NULL, xml, NULL));
VIR_FREE(xml);
}
/* Call hook with stopped operation. Ignore error and continue with cleanup */
ignore_value(libxlDomainHookRun(driver, vm->def, 0,
VIR_HOOK_LIBXL_OP_STOPPED,
VIR_HOOK_SUBOP_END, NULL));
virHostdevReAttachDomainDevices(hostdev_mgr, LIBXL_DRIVER_INTERNAL_NAME,
vm->def, hostdev_flags);
@ -956,16 +969,10 @@ libxlDomainCleanup(libxlDriverPrivate *driver,
VIR_DEBUG("Failed to remove domain XML for %s", vm->def->name);
VIR_FREE(file);
/* The "release" hook cleans up additional resources */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL)) {
char *xml = virDomainDefFormat(vm->def, driver->xmlopt, 0);
/* we can't stop the operation even if the script raised an error */
ignore_value(virHookCall(VIR_HOOK_DRIVER_LIBXL, vm->def->name,
VIR_HOOK_LIBXL_OP_RELEASE, VIR_HOOK_SUBOP_END,
NULL, xml, NULL));
VIR_FREE(xml);
}
/* Call hook with release operation. Ignore error and continue with cleanup */
ignore_value(libxlDomainHookRun(driver, vm->def, 0,
VIR_HOOK_LIBXL_OP_RELEASE,
VIR_HOOK_SUBOP_END, NULL));
virDomainObjRemoveTransientDef(vm);
}
@ -1234,19 +1241,10 @@ libxlDomainStartPrepare(libxlDriverPrivate *driver,
return -1;
/* Run an early hook to set-up missing devices */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL)) {
g_autofree char *xml = virDomainDefFormat(vm->def, driver->xmlopt, 0);
int hookret;
hookret = virHookCall(VIR_HOOK_DRIVER_LIBXL, vm->def->name,
VIR_HOOK_LIBXL_OP_PREPARE, VIR_HOOK_SUBOP_BEGIN,
NULL, xml, NULL);
/*
* If the script raised an error abort the launch
*/
if (hookret < 0)
goto error;
}
if (libxlDomainHookRun(driver, vm->def, 0,
VIR_HOOK_LIBXL_OP_PREPARE,
VIR_HOOK_SUBOP_BEGIN, NULL) < 0)
goto error;
if (virDomainLockProcessStart(driver->lockManager,
"xen:///system",
@ -1300,21 +1298,10 @@ libxlDomainStartPerform(libxlDriverPrivate *driver,
goto cleanup;
/* now that we know it is about to start call the hook if present */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL)) {
char *xml = virDomainDefFormat(vm->def, driver->xmlopt, 0);
int hookret;
hookret = virHookCall(VIR_HOOK_DRIVER_LIBXL, vm->def->name,
VIR_HOOK_LIBXL_OP_START, VIR_HOOK_SUBOP_BEGIN,
NULL, xml, NULL);
VIR_FREE(xml);
/*
* If the script raised an error abort the launch
*/
if (hookret < 0)
goto cleanup;
}
if (libxlDomainHookRun(driver, vm->def, 0,
VIR_HOOK_LIBXL_OP_START,
VIR_HOOK_SUBOP_BEGIN, NULL) < 0)
goto cleanup;
if (priv->hookRun) {
char uuidstr[VIR_UUID_STRING_BUFLEN];
@ -1404,21 +1391,10 @@ libxlDomainStartPerform(libxlDriverPrivate *driver,
goto destroy_dom;
/* finally we can call the 'started' hook script if any */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL)) {
char *xml = virDomainDefFormat(vm->def, driver->xmlopt, 0);
int hookret;
hookret = virHookCall(VIR_HOOK_DRIVER_LIBXL, vm->def->name,
VIR_HOOK_LIBXL_OP_STARTED, VIR_HOOK_SUBOP_BEGIN,
NULL, xml, NULL);
VIR_FREE(xml);
/*
* If the script raised an error abort the launch
*/
if (hookret < 0)
goto destroy_dom;
}
if (libxlDomainHookRun(driver, vm->def, 0,
VIR_HOOK_LIBXL_OP_STARTED,
VIR_HOOK_SUBOP_BEGIN, NULL) < 0)
goto destroy_dom;
ret = 0;
goto cleanup;

8
src/libxl/libxl_domain.h
View File

@ -108,6 +108,14 @@ libxlDomainSaveImageOpen(libxlDriverPrivate *driver,
libxlSavefileHeader *ret_hdr)
ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
int
libxlDomainHookRun(libxlDriverPrivate *driver,
virDomainDef *def,
unsigned int def_fmtflags,
int hookop,
int hooksubop,
char **output);
int
libxlDomainDestroyInternal(libxlDriverPrivate *driver,
virDomainObj *vm);

26
src/libxl/libxl_driver.c
View File

@ -450,26 +450,12 @@ libxlReconnectDomain(virDomainObj *vm,
if (virDomainObjSave(vm, driver->xmlopt, cfg->stateDir) < 0)
VIR_WARN("Cannot update XML for running Xen guest %s", vm->def->name);
/* now that we know it's reconnected call the hook if present */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL) &&
STRNEQ("Domain-0", vm->def->name)) {
char *xml = virDomainDefFormat(vm->def, driver->xmlopt, 0);
int hookret;
/* we can't stop the operation even if the script raised an error */
hookret = virHookCall(VIR_HOOK_DRIVER_LIBXL, vm->def->name,
VIR_HOOK_LIBXL_OP_RECONNECT, VIR_HOOK_SUBOP_BEGIN,
NULL, xml, NULL);
VIR_FREE(xml);
if (hookret < 0) {
/* Stop the domain if the hook failed */
if (virDomainObjIsActive(vm)) {
libxlDomainDestroyInternal(driver, vm);
virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_FAILED);
}
goto error;
}
}
/* now that we know it's reconnected call the hook */
if (STRNEQ("Domain-0", vm->def->name) &&
(libxlDomainHookRun(driver, vm->def, 0,
VIR_HOOK_LIBXL_OP_RECONNECT,
VIR_HOOK_SUBOP_BEGIN, NULL) < 0))
goto error;
ret = 0;

15
src/libxl/libxl_migration.c
View File

@ -490,18 +490,13 @@ libxlDomainMigrationPrepareAny(virConnectPtr dconn,
/* Let migration hook filter domain XML */
if (virHookPresent(VIR_HOOK_DRIVER_LIBXL)) {
char *xml;
int hookret;
if (!(xml = virDomainDefFormat(*def, driver->xmlopt,
VIR_DOMAIN_XML_SECURE |
VIR_DOMAIN_XML_MIGRATABLE)))
return -1;
hookret = virHookCall(VIR_HOOK_DRIVER_LIBXL, (*def)->name,
VIR_HOOK_LIBXL_OP_MIGRATE, VIR_HOOK_SUBOP_BEGIN,
NULL, xml, xmlout);
VIR_FREE(xml);
hookret = libxlDomainHookRun(driver, *def,
VIR_DOMAIN_XML_SECURE | VIR_DOMAIN_XML_MIGRATABLE,
VIR_HOOK_LIBXL_OP_MIGRATE,
VIR_HOOK_SUBOP_BEGIN,
xmlout);
if (hookret < 0) {
return -1;