[libvirt] [PATCH 05/11] Convert Xen domain start/migration APIs to use virDomainDefPtr
Daniel P. Berrange
berrange at redhat.com
Thu May 9 12:59:27 UTC 2013
From: "Daniel P. Berrange" <berrange at redhat.com>
Introduce use of a virDomainDefPtr in the domain migrate &
start APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/xen/xen_driver.c | 127 ++++++++++++++++++++++++++++++++----------------
src/xen/xend_internal.c | 71 +++++++++------------------
src/xen/xend_internal.h | 22 ++++++---
src/xen/xm_internal.c | 49 ++++++++-----------
src/xen/xm_internal.h | 7 +--
5 files changed, 148 insertions(+), 128 deletions(-)
diff --git a/src/xen/xen_driver.c b/src/xen/xen_driver.c
index 89b038c..8b7dec9 100644
--- a/src/xen/xen_driver.c
+++ b/src/xen/xen_driver.c
@@ -1294,18 +1294,31 @@ static char *
xenUnifiedDomainGetXMLDesc(virDomainPtr dom, unsigned int flags)
{
xenUnifiedPrivatePtr priv = dom->conn->privateData;
+ virDomainDefPtr minidef = NULL;
+ virDomainDefPtr def = NULL;
+ char *ret = NULL;
+
+ if (!(minidef = xenGetDomainDefForDom(dom)))
+ goto cleanup;
if (dom->id < 0 && priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4) {
- return xenXMDomainGetXMLDesc(dom, flags);
+ def = xenXMDomainGetXMLDesc(dom->conn, minidef);
} else {
- char *cpus, *res;
+ char *cpus;
xenUnifiedLock(priv);
cpus = xenDomainUsedCpus(dom);
xenUnifiedUnlock(priv);
- res = xenDaemonDomainGetXMLDesc(dom, flags, cpus);
+ def = xenDaemonDomainGetXMLDesc(dom->conn, minidef, cpus);
VIR_FREE(cpus);
- return res;
}
+
+ if (def)
+ ret = virDomainDefFormat(def, flags);
+
+cleanup:
+ virDomainDefFree(def);
+ virDomainDefFree(minidef);
+ return ret;
}
@@ -1438,10 +1451,21 @@ xenUnifiedDomainMigratePerform(virDomainPtr dom,
const char *dname,
unsigned long resource)
{
+ virDomainDefPtr def = NULL;
+ int ret = -1;
+
virCheckFlags(XEN_MIGRATION_FLAGS, -1);
- return xenDaemonDomainMigratePerform(dom, cookie, cookielen, uri,
- flags, dname, resource);
+ if (!(def = xenGetDomainDefForDom(dom)))
+ goto cleanup;
+
+ ret = xenDaemonDomainMigratePerform(dom->conn, def,
+ cookie, cookielen, uri,
+ flags, dname, resource);
+
+cleanup:
+ virDomainDefFree(def);
+ return ret;
}
static virDomainPtr
@@ -1452,45 +1476,37 @@ xenUnifiedDomainMigrateFinish(virConnectPtr dconn,
const char *uri ATTRIBUTE_UNUSED,
unsigned long flags)
{
- virDomainPtr dom = NULL;
- char *domain_xml = NULL;
- virDomainPtr dom_new = NULL;
+ xenUnifiedPrivatePtr priv = dconn->privateData;
+ virDomainPtr ret = NULL;
+ virDomainDefPtr minidef = NULL;
+ virDomainDefPtr def = NULL;
virCheckFlags(XEN_MIGRATION_FLAGS, NULL);
- if (!(dom = xenUnifiedDomainLookupByName(dconn, dname)))
- return NULL;
+ if (!(minidef = xenGetDomainDefForName(dconn, dname)))
+ goto cleanup;
if (flags & VIR_MIGRATE_PERSIST_DEST) {
- domain_xml = xenDaemonDomainGetXMLDesc(dom, 0, NULL);
- if (! domain_xml) {
- virReportError(VIR_ERR_MIGRATE_PERSIST_FAILED,
- "%s", _("failed to get XML representation of migrated domain"));
- goto error;
- }
+ if (!(def = xenDaemonDomainGetXMLDesc(dconn, minidef, NULL)))
+ goto cleanup;
- dom_new = xenDaemonDomainDefineXML(dconn, domain_xml);
- if (! dom_new) {
- virReportError(VIR_ERR_MIGRATE_PERSIST_FAILED,
- "%s", _("failed to define domain on destination host"));
- goto error;
+ if (priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4) {
+ if (xenXMDomainDefineXML(dconn, def) < 0)
+ goto cleanup;
+ } else {
+ if (xenDaemonDomainDefineXML(dconn, def) < 0)
+ goto cleanup;
}
-
- /* Free additional reference added by Define */
- virDomainFree(dom_new);
}
- VIR_FREE(domain_xml);
-
- return dom;
-
+ ret = virGetDomain(dconn, minidef->name, minidef->uuid);
+ if (ret)
+ ret->id = minidef->id;
-error:
- virDomainFree(dom);
-
- VIR_FREE(domain_xml);
-
- return NULL;
+cleanup:
+ virDomainDefFree(def);
+ virDomainDefFree(minidef);
+ return ret;
}
static int
@@ -1565,23 +1581,52 @@ static virDomainPtr
xenUnifiedDomainDefineXML(virConnectPtr conn, const char *xml)
{
xenUnifiedPrivatePtr priv = conn->privateData;
+ virDomainDefPtr def = NULL;
+ virDomainPtr ret = NULL;
- if (priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4)
- return xenXMDomainDefineXML(conn, xml);
- else
- return xenDaemonDomainDefineXML(conn, xml);
+ if (!(def = virDomainDefParseString(xml, priv->caps, priv->xmlopt,
+ 1 << VIR_DOMAIN_VIRT_XEN,
+ VIR_DOMAIN_XML_INACTIVE)))
+ goto cleanup;
+
+ if (priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4) {
+ if (xenXMDomainDefineXML(conn, def) < 0)
+ goto cleanup;
+ def = NULL; /* XM driver owns it now */
+ } else {
+ if (xenDaemonDomainDefineXML(conn, def) < 0)
+ goto cleanup;
+ }
+
+ ret = virGetDomain(conn, def->name, def->uuid);
+ if (ret)
+ ret->id = -1;
+
+cleanup:
+ virDomainDefFree(def);
+ return ret;
}
static int
xenUnifiedDomainUndefineFlags(virDomainPtr dom, unsigned int flags)
{
xenUnifiedPrivatePtr priv = dom->conn->privateData;
+ virDomainDefPtr def = NULL;
+ int ret = -1;
virCheckFlags(0, -1);
+
+ if (!(def = xenGetDomainDefForDom(dom)))
+ goto cleanup;
+
if (priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4)
- return xenXMDomainUndefine(dom);
+ ret = xenXMDomainUndefine(dom->conn, def);
else
- return xenDaemonDomainUndefine(dom);
+ ret = xenDaemonDomainUndefine(dom->conn, def);
+
+cleanup:
+ virDomainDefFree(def);
+ return ret;
}
static int
diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c
index 9555b33..77c4dec 100644
--- a/src/xen/xend_internal.c
+++ b/src/xen/xend_internal.c
@@ -1604,7 +1604,6 @@ cleanup:
/**
* xenDaemonDomainGetXMLDesc:
* @domain: a domain object
- * @flags: potential dump flags
* @cpus: list of cpu the domain is pinned to.
*
* Provide an XML description of the domain.
@@ -1612,27 +1611,15 @@ cleanup:
* Returns a 0 terminated UTF-8 encoded XML instance, or NULL in case of error.
* the caller must free() the returned value.
*/
-char *
-xenDaemonDomainGetXMLDesc(virDomainPtr domain,
- unsigned int flags,
+virDomainDefPtr
+xenDaemonDomainGetXMLDesc(virConnectPtr conn,
+ virDomainDefPtr minidef,
const char *cpus)
{
- virDomainDefPtr def;
- char *xml;
-
- /* Flags checked by virDomainDefFormat */
-
- if (!(def = xenDaemonDomainFetch(domain->conn,
- domain->id,
- domain->name,
- cpus)))
- return NULL;
-
- xml = virDomainDefFormat(def, flags);
-
- virDomainDefFree(def);
-
- return xml;
+ return xenDaemonDomainFetch(conn,
+ minidef->id,
+ minidef->name,
+ cpus);
}
@@ -2657,7 +2644,8 @@ xenDaemonDomainMigratePrepare(virConnectPtr dconn ATTRIBUTE_UNUSED,
}
int
-xenDaemonDomainMigratePerform(virDomainPtr domain,
+xenDaemonDomainMigratePerform(virConnectPtr conn,
+ virDomainDefPtr def,
const char *cookie ATTRIBUTE_UNUSED,
int cookielen ATTRIBUTE_UNUSED,
const char *uri,
@@ -2801,7 +2789,7 @@ xenDaemonDomainMigratePerform(virDomainPtr domain,
* to our advantage since all parameters supported and required
* by current xend can be included without breaking older xend.
*/
- ret = xend_op(domain->conn, domain->name,
+ ret = xend_op(conn, def->name,
"op", "migrate",
"destination", hostname,
"live", live,
@@ -2814,34 +2802,24 @@ xenDaemonDomainMigratePerform(virDomainPtr domain,
VIR_FREE(hostname);
if (ret == 0 && undefined_source)
- xenDaemonDomainUndefine(domain);
+ xenDaemonDomainUndefine(conn, def);
VIR_DEBUG("migration done");
return ret;
}
-virDomainPtr
-xenDaemonDomainDefineXML(virConnectPtr conn, const char *xmlDesc)
+int
+xenDaemonDomainDefineXML(virConnectPtr conn, virDomainDefPtr def)
{
- int ret;
+ int ret = -1;
char *sexpr;
- virDomainPtr dom;
xenUnifiedPrivatePtr priv = conn->privateData;
- virDomainDefPtr def;
-
- if (!(def = virDomainDefParseString(xmlDesc, priv->caps, priv->xmlopt,
- 1 << VIR_DOMAIN_VIRT_XEN,
- VIR_DOMAIN_XML_INACTIVE))) {
- virReportError(VIR_ERR_XML_ERROR,
- "%s", _("failed to parse domain description"));
- return NULL;
- }
if (!(sexpr = xenFormatSxpr(conn, def, priv->xendConfigVersion))) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("failed to build sexpr"));
- goto error;
+ goto cleanup;
}
ret = xend_op(conn, "", "op", "new", "config", sexpr, NULL);
@@ -2849,20 +2827,15 @@ xenDaemonDomainDefineXML(virConnectPtr conn, const char *xmlDesc)
if (ret != 0) {
virReportError(VIR_ERR_XEN_CALL,
_("Failed to create inactive domain %s"), def->name);
- goto error;
+ goto cleanup;
}
- dom = virDomainLookupByName(conn, def->name);
- if (dom == NULL) {
- goto error;
- }
- virDomainDefFree(def);
- return dom;
+ ret = 0;
- error:
- virDomainDefFree(def);
- return NULL;
+cleanup:
+ return ret;
}
+
int
xenDaemonDomainCreate(virConnectPtr conn,
virDomainDefPtr def)
@@ -2882,9 +2855,9 @@ xenDaemonDomainCreate(virConnectPtr conn,
}
int
-xenDaemonDomainUndefine(virDomainPtr domain)
+xenDaemonDomainUndefine(virConnectPtr conn, virDomainDefPtr def)
{
- return xend_op(domain->conn, domain->name, "op", "delete", NULL);
+ return xend_op(conn, def->name, "op", "delete", NULL);
}
/**
diff --git a/src/xen/xend_internal.h b/src/xen/xend_internal.h
index 01d321f..1284db3 100644
--- a/src/xen/xend_internal.h
+++ b/src/xen/xend_internal.h
@@ -111,8 +111,9 @@ int xenDaemonDomainGetState(virConnectPtr conn,
virDomainDefPtr def,
int *state,
int *reason);
-char *xenDaemonDomainGetXMLDesc(virDomainPtr domain, unsigned int flags,
- const char *cpus);
+virDomainDefPtr xenDaemonDomainGetXMLDesc(virConnectPtr conn,
+ virDomainDefPtr def,
+ const char *cpus);
unsigned long long xenDaemonDomainGetMaxMemory(virConnectPtr conn,
virDomainDefPtr def);
char **xenDaemonListDomainsOld(virConnectPtr xend);
@@ -132,10 +133,12 @@ int xenDaemonDetachDeviceFlags(virDomainPtr domain,
const char *xml,
unsigned int flags);
-virDomainPtr xenDaemonDomainDefineXML(virConnectPtr xend, const char *sexpr);
+int xenDaemonDomainDefineXML(virConnectPtr conn,
+ virDomainDefPtr def);
int xenDaemonDomainCreate(virConnectPtr conn,
virDomainDefPtr def);
-int xenDaemonDomainUndefine(virDomainPtr domain);
+int xenDaemonDomainUndefine(virConnectPtr conn,
+ virDomainDefPtr def);
int xenDaemonDomainSetVcpus (virDomainPtr domain,
unsigned int vcpus);
@@ -163,8 +166,15 @@ int xenDaemonDomainSetAutostart (virDomainPtr domain,
virDomainPtr xenDaemonCreateXML(virConnectPtr conn, const char *xmlDesc);
virDomainDefPtr xenDaemonLookupByUUID(virConnectPtr conn, const unsigned char *uuid);
virDomainDefPtr xenDaemonLookupByName(virConnectPtr conn, const char *domname);
-int xenDaemonDomainMigratePrepare (virConnectPtr dconn, char **cookie, int *cookielen, const char *uri_in, char **uri_out, unsigned long flags, const char *dname, unsigned long resource);
-int xenDaemonDomainMigratePerform (virDomainPtr domain, const char *cookie, int cookielen, const char *uri, unsigned long flags, const char *dname, unsigned long resource);
+int xenDaemonDomainMigratePrepare (virConnectPtr dconn,
+ char **cookie, int *cookielen,
+ const char *uri_in, char **uri_out,
+ unsigned long flags, const char *dname, unsigned long resource);
+int xenDaemonDomainMigratePerform (virConnectPtr conn,
+ virDomainDefPtr def,
+ const char *cookie, int cookielen,
+ const char *uri, unsigned long flags,
+ const char *dname, unsigned long resource);
int xenDaemonDomainBlockPeek (virDomainPtr domain, const char *path, unsigned long long offset, size_t size, void *buffer);
diff --git a/src/xen/xm_internal.c b/src/xen/xm_internal.c
index 6c884d9..79f773d 100644
--- a/src/xen/xm_internal.c
+++ b/src/xen/xm_internal.c
@@ -500,28 +500,29 @@ error:
* Turn a config record into a lump of XML describing the
* domain, suitable for later feeding for virDomainCreateXML
*/
-char *
-xenXMDomainGetXMLDesc(virDomainPtr domain, unsigned int flags)
+virDomainDefPtr
+xenXMDomainGetXMLDesc(virConnectPtr conn,
+ virDomainDefPtr def)
{
- xenUnifiedPrivatePtr priv = domain->conn->privateData;
+ xenUnifiedPrivatePtr priv = conn->privateData;
const char *filename;
xenXMConfCachePtr entry;
- char *ret = NULL;
+ virDomainDefPtr ret = NULL;
/* Flags checked by virDomainDefFormat */
- if (domain->id != -1)
- return NULL;
-
xenUnifiedLock(priv);
- if (!(filename = virHashLookup(priv->nameConfigMap, domain->name)))
+ if (!(filename = virHashLookup(priv->nameConfigMap, def->name)))
goto cleanup;
if (!(entry = virHashLookup(priv->configCache, filename)))
goto cleanup;
- ret = virDomainDefFormat(entry->def, flags);
+ ret = virDomainDefCopy(entry->def,
+ priv->caps,
+ priv->xmlopt,
+ false);
cleanup:
xenUnifiedUnlock(priv);
@@ -945,13 +946,11 @@ xenXMDomainCreate(virConnectPtr conn,
* Create a config file for a domain, based on an XML
* document describing its config
*/
-virDomainPtr
-xenXMDomainDefineXML(virConnectPtr conn, const char *xml)
+int
+xenXMDomainDefineXML(virConnectPtr conn, virDomainDefPtr def)
{
- virDomainPtr ret;
char *filename = NULL;
const char *oldfilename;
- virDomainDefPtr def = NULL;
virConfPtr conf = NULL;
xenXMConfCachePtr entry = NULL;
xenUnifiedPrivatePtr priv = conn->privateData;
@@ -960,14 +959,7 @@ xenXMDomainDefineXML(virConnectPtr conn, const char *xml)
if (!xenInotifyActive(conn) && xenXMConfigCacheRefresh(conn) < 0) {
xenUnifiedUnlock(priv);
- return NULL;
- }
-
- if (!(def = virDomainDefParseString(xml, priv->caps, priv->xmlopt,
- 1 << VIR_DOMAIN_VIRT_XEN,
- VIR_DOMAIN_XML_INACTIVE))) {
- xenUnifiedUnlock(priv);
- return NULL;
+ return -1;
}
if (!(conf = xenFormatXM(conn, def, priv->xendConfigVersion)))
@@ -1061,10 +1053,9 @@ xenXMDomainDefineXML(virConnectPtr conn, const char *xml)
goto error;
}
- ret = virGetDomain(conn, def->name, def->uuid);
xenUnifiedUnlock(priv);
VIR_FREE(filename);
- return ret;
+ return 0;
error:
VIR_FREE(filename);
@@ -1072,25 +1063,25 @@ xenXMDomainDefineXML(virConnectPtr conn, const char *xml)
VIR_FREE(entry->filename);
VIR_FREE(entry);
virConfFree(conf);
- virDomainDefFree(def);
xenUnifiedUnlock(priv);
- return NULL;
+ return -1;
}
/*
* Delete a domain from disk
*/
int
-xenXMDomainUndefine(virDomainPtr domain)
+xenXMDomainUndefine(virConnectPtr conn,
+ virDomainDefPtr def)
{
- xenUnifiedPrivatePtr priv = domain->conn->privateData;
+ xenUnifiedPrivatePtr priv = conn->privateData;
const char *filename;
xenXMConfCachePtr entry;
int ret = -1;
xenUnifiedLock(priv);
- if (!(filename = virHashLookup(priv->nameConfigMap, domain->name)))
+ if (!(filename = virHashLookup(priv->nameConfigMap, def->name)))
goto cleanup;
if (!(entry = virHashLookup(priv->configCache, filename)))
@@ -1100,7 +1091,7 @@ xenXMDomainUndefine(virDomainPtr domain)
goto cleanup;
/* Remove the name -> filename mapping */
- if (virHashRemoveEntry(priv->nameConfigMap, domain->name) < 0)
+ if (virHashRemoveEntry(priv->nameConfigMap, def->name) < 0)
goto cleanup;
/* Remove the config record itself */
diff --git a/src/xen/xm_internal.h b/src/xen/xm_internal.h
index 0521625..5a434b9 100644
--- a/src/xen/xm_internal.h
+++ b/src/xen/xm_internal.h
@@ -44,7 +44,8 @@ int xenXMDomainGetState(virConnectPtr conn,
virDomainDefPtr def,
int *state,
int *reason);
-char *xenXMDomainGetXMLDesc(virDomainPtr domain, unsigned int flags);
+virDomainDefPtr xenXMDomainGetXMLDesc(virConnectPtr conn,
+ virDomainDefPtr def);
int xenXMDomainSetMemory(virConnectPtr conn,
virDomainDefPtr def,
unsigned long memory);
@@ -67,8 +68,8 @@ int xenXMNumOfDefinedDomains(virConnectPtr conn);
int xenXMDomainCreate(virConnectPtr conn,
virDomainDefPtr def);
-virDomainPtr xenXMDomainDefineXML(virConnectPtr con, const char *xml);
-int xenXMDomainUndefine(virDomainPtr domain);
+int xenXMDomainDefineXML(virConnectPtr con, virDomainDefPtr def);
+int xenXMDomainUndefine(virConnectPtr conn, virDomainDefPtr def);
int xenXMDomainBlockPeek (virDomainPtr dom, const char *path, unsigned long long offset, size_t size, void *buffer);
--
1.8.1.4
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