Simplify the Xen domain get info/state driver methods

Make the xenUnifiedDomainGetInfo and xenUnifiedDomainGetState drivers
call the correct sub-driver APIs directly.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/xen/xen_driver.c

@@ -84,7 +84,6 @@ xenUnifiedDomainGetVcpus(virDomainPtr dom,
 static struct xenUnifiedDriver const * const drivers[XEN_UNIFIED_NR_DRIVERS] = {
     [XEN_UNIFIED_HYPERVISOR_OFFSET] = &xenHypervisorDriver,
     [XEN_UNIFIED_XEND_OFFSET] = &xenDaemonDriver,
-    [XEN_UNIFIED_XS_OFFSET] = &xenStoreDriver,
     [XEN_UNIFIED_XM_OFFSET] = &xenXMDriver,
 };
 
@@ -853,15 +852,15 @@ static int
 xenUnifiedDomainGetInfo(virDomainPtr dom, virDomainInfoPtr info)
 {
     xenUnifiedPrivatePtr priv = dom->conn->privateData;
-    int i;
-
-    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
-        if (priv->opened[i] &&
-            drivers[i]->xenDomainGetInfo &&
-            drivers[i]->xenDomainGetInfo(dom, info) == 0)
-            return 0;
 
-    return -1;
+    if (dom->id < 0) {
+        if (priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4)
+            return xenXMDomainGetInfo(dom, info);
+        else
+            return xenDaemonDomainGetInfo(dom, info);
+    } else {
+        return xenHypervisorGetDomainInfo(dom, info);
+    }
 }
 
 static int
@@ -871,38 +870,17 @@ xenUnifiedDomainGetState(virDomainPtr dom,
                          unsigned int flags)
 {
     xenUnifiedPrivatePtr priv = dom->conn->privateData;
-    int ret;
 
     virCheckFlags(0, -1);
 
-    /* trying drivers in the same order as GetInfo for consistent results:
-     * hypervisor, xend, xs, and xm */
-
-    if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET]) {
-        ret = xenHypervisorGetDomainState(dom, state, reason, flags);
-        if (ret >= 0)
-            return ret;
-    }
-
-    if (priv->opened[XEN_UNIFIED_XEND_OFFSET]) {
-        ret = xenDaemonDomainGetState(dom, state, reason, flags);
-        if (ret >= 0)
-            return ret;
-    }
-
-    if (priv->opened[XEN_UNIFIED_XS_OFFSET]) {
-        ret = xenStoreDomainGetState(dom, state, reason, flags);
-        if (ret >= 0)
-            return ret;
-    }
-
-    if (priv->opened[XEN_UNIFIED_XM_OFFSET]) {
-        ret = xenXMDomainGetState(dom, state, reason, flags);
-        if (ret >= 0)
-            return ret;
+    if (dom->id < 0) {
+        if (priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4)
+            return xenXMDomainGetState(dom, state, reason);
+        else
+            return xenDaemonDomainGetState(dom, state, reason);
+    } else {
+        return xenHypervisorGetDomainState(dom, state, reason);
     }
-
-    return -1;
 }
 
 static int

src/xen/xen_driver.h

@@ -93,7 +93,6 @@ extern int xenRegister (void);
  * structure with direct calls in xen_unified.c.
  */
 struct xenUnifiedDriver {
-    virDrvDomainGetInfo xenDomainGetInfo;
     virDrvDomainPinVcpu xenDomainPinVcpu;
     virDrvDomainGetVcpus xenDomainGetVcpus;
     virDrvConnectListDefinedDomains xenListDefinedDomains;

src/xen/xen_hypervisor.c

@@ -871,7 +871,6 @@ typedef struct xen_op_v2_dom xen_op_v2_dom;
 #endif
 
 struct xenUnifiedDriver xenHypervisorDriver = {
-    .xenDomainGetInfo = xenHypervisorGetDomainInfo,
     .xenDomainPinVcpu = xenHypervisorPinVcpu,
     .xenDomainGetVcpus = xenHypervisorGetVcpus,
     .xenDomainGetSchedulerType = xenHypervisorGetSchedulerType,
@@ -2880,11 +2879,7 @@ xenHypervisorGetDomInfo(virConnectPtr conn, int id, virDomainInfoPtr info)
 int
 xenHypervisorGetDomainInfo(virDomainPtr domain, virDomainInfoPtr info)
 {
-    if (domain->id < 0)
-        return -1;
-
     return xenHypervisorGetDomInfo(domain->conn, domain->id, info);
-
 }
 
 /**
@@ -2892,7 +2887,6 @@ xenHypervisorGetDomainInfo(virDomainPtr domain, virDomainInfoPtr info)
  * @domain: pointer to the domain block
  * @state: returned state of the domain
  * @reason: returned reason for the state
- * @flags: additional flags, 0 for now
  *
  * Do a hypervisor call to get the related set of domain information.
  *
@@ -2901,16 +2895,10 @@ xenHypervisorGetDomainInfo(virDomainPtr domain, virDomainInfoPtr info)
 int
 xenHypervisorGetDomainState(virDomainPtr domain,
                             int *state,
-                            int *reason,
-                            unsigned int flags)
+                            int *reason)
 {
     virDomainInfo info;
 
-    virCheckFlags(0, -1);
-
-    if (domain->id < 0)
-        return -1;
-
     if (xenHypervisorGetDomInfo(domain->conn, domain->id, &info) < 0)
         return -1;
 

src/xen/xen_hypervisor.h

@@ -76,8 +76,7 @@ int     xenHypervisorGetDomainInfo        (virDomainPtr domain,
           ATTRIBUTE_NONNULL (1);
 int     xenHypervisorGetDomainState     (virDomainPtr domain,
                                          int *state,
-                                         int *reason,
-                                         unsigned int flags)
+                                         int *reason)
           ATTRIBUTE_NONNULL (1);
 int     xenHypervisorGetDomInfo         (virConnectPtr conn,
                                          int id,

src/xen/xend_internal.c

@@ -1648,10 +1648,6 @@ xenDaemonDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
 {
     struct sexpr *root;
     int ret;
-    xenUnifiedPrivatePtr priv = domain->conn->privateData;
-
-    if (domain->id < 0 && priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4)
-        return -1;
 
     root = sexpr_get(domain->conn, "/xend/domain/%s?detail=1", domain->name);
     if (root == NULL)
@@ -1668,7 +1664,6 @@ xenDaemonDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
  * @domain: a domain object
  * @state: returned domain's state
  * @reason: returned reason for the state
- * @flags: additional flags, 0 for now
  *
  * This method looks up domain state and reason.
  *
@@ -1677,17 +1672,10 @@ xenDaemonDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
 int
 xenDaemonDomainGetState(virDomainPtr domain,
                         int *state,
-                        int *reason,
-                        unsigned int flags)
+                        int *reason)
 {
-    xenUnifiedPrivatePtr priv = domain->conn->privateData;
     struct sexpr *root;
 
-    virCheckFlags(0, -1);
-
-    if (domain->id < 0 && priv->xendConfigVersion < XEND_CONFIG_VERSION_3_0_4)
-        return -1;
-
     root = sexpr_get(domain->conn, "/xend/domain/%s?detail=1", domain->name);
     if (!root)
         return -1;
@@ -3425,7 +3413,6 @@ xenDaemonDomainBlockPeek(virDomainPtr domain,
 }
 
 struct xenUnifiedDriver xenDaemonDriver = {
-    .xenDomainGetInfo = xenDaemonDomainGetInfo,
     .xenDomainPinVcpu = xenDaemonDomainPinVcpu,
     .xenDomainGetVcpus = xenDaemonDomainGetVcpus,
     .xenListDefinedDomains = xenDaemonListDefinedDomains,

src/xen/xend_internal.h

@@ -101,8 +101,7 @@ int xenDaemonDomainSetMaxMemory(virDomainPtr domain, unsigned long memory);
 int xenDaemonDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info);
 int xenDaemonDomainGetState(virDomainPtr domain,
                             int *state,
-                            int *reason,
-                            unsigned int flags);
+                            int *reason);
 char *xenDaemonDomainGetXMLDesc(virDomainPtr domain, unsigned int flags,
                                 const char *cpus);
 unsigned long long xenDaemonDomainGetMaxMemory(virDomainPtr domain);

src/xen/xm_internal.c

@@ -81,7 +81,6 @@ static int xenXMDomainDetachDeviceFlags(virDomainPtr domain, const char *xml,
 #define XM_XML_ERROR "Invalid xml"
 
 struct xenUnifiedDriver xenXMDriver = {
-    .xenDomainGetInfo = xenXMDomainGetInfo,
     .xenDomainPinVcpu = xenXMDomainPinVcpu,
     .xenListDefinedDomains = xenXMListDefinedDomains,
     .xenNumOfDefinedDomains = xenXMNumOfDefinedDomains,
@@ -462,15 +461,10 @@ xenXMClose(virConnectPtr conn)
  * Since these are all offline domains, the state is always SHUTOFF.
  */
 int
-xenXMDomainGetState(virDomainPtr domain,
-                    int *state, int *reason,
-                    unsigned int flags)
+xenXMDomainGetState(virDomainPtr domain ATTRIBUTE_UNUSED,
+                    int *state,
+                    int *reason)
 {
-    virCheckFlags(0, -1);
-
-    if (domain->id != -1)
-        return -1;
-
     *state = VIR_DOMAIN_SHUTOFF;
     if (reason)
         *reason = 0;
@@ -490,9 +484,6 @@ xenXMDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
     const char *filename;
     xenXMConfCachePtr entry;
 
-    if (domain->id != -1)
-        return -1;
-
     xenUnifiedLock(priv);
 
     if (!(filename = virHashLookup(priv->nameConfigMap, domain->name)))

src/xen/xm_internal.h

@@ -42,8 +42,7 @@ const char *xenXMGetType(virConnectPtr conn);
 int xenXMDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info);
 int xenXMDomainGetState(virDomainPtr domain,
                         int *state,
-                        int *reason,
-                        unsigned int flags);
+                        int *reason);
 char *xenXMDomainGetXMLDesc(virDomainPtr domain, unsigned int flags);
 int xenXMDomainSetMemory(virDomainPtr domain, unsigned long memory);
 int xenXMDomainSetMaxMemory(virDomainPtr domain, unsigned long memory);

src/xen/xs_internal.c

@@ -56,32 +56,11 @@
 static void xenStoreWatchEvent(int watch, int fd, int events, void *data);
 static void xenStoreWatchListFree(xenStoreWatchListPtr list);
 
-struct xenUnifiedDriver xenStoreDriver = {
-    .xenDomainGetInfo = xenStoreGetDomainInfo,
-};
-
 /************************************************************************
  *									*
  *		Helper internal APIs					*
  *									*
  ************************************************************************/
-/**
- * virConnectDoStoreList:
- * @conn: pointer to the hypervisor connection
- * @path: the absolute path of the directory in the store to list
- * @nb: OUT pointer to the number of items found
- *
- * Internal API querying the Xenstore for a list
- *
- * Returns a string which must be freed by the caller or NULL in case of error
- */
-static char **
-virConnectDoStoreList(virConnectPtr conn, const char *path, unsigned int *nb)
-{
-    xenUnifiedPrivatePtr priv = conn->privateData;
-
-    return xs_directory(priv->xshandle, 0, path, nb);
-}
 
 /**
  * virDomainDoStoreQuery:
@@ -234,100 +213,6 @@ xenStoreClose(virConnectPtr conn)
     return 0;
 }
 
-/**
- * xenStoreGetDomainInfo:
- * @domain: pointer to the domain block
- * @info: the place where information should be stored
- *
- * Do a hypervisor call to get the related set of domain information.
- *
- * Returns 0 in case of success, -1 in case of error.
- */
-int
-xenStoreGetDomainInfo(virDomainPtr domain, virDomainInfoPtr info)
-{
-    char *tmp, **tmp2;
-    unsigned int nb_vcpus;
-    char request[200];
-    xenUnifiedPrivatePtr priv = domain->conn->privateData;
-
-    if (priv->xshandle == NULL || domain->id == -1)
-        return -1;
-
-    tmp = virDomainDoStoreQuery(domain->conn, domain->id, "running");
-    if (tmp != NULL) {
-        if (tmp[0] == '1')
-            info->state = VIR_DOMAIN_RUNNING;
-        VIR_FREE(tmp);
-    } else {
-        info->state = VIR_DOMAIN_NOSTATE;
-    }
-    tmp = virDomainDoStoreQuery(domain->conn, domain->id, "memory/target");
-    if (tmp != NULL) {
-        info->memory = atol(tmp);
-        info->maxMem = atol(tmp);
-        VIR_FREE(tmp);
-    } else {
-        info->memory = 0;
-        info->maxMem = 0;
-    }
-#if 0
-    /* doesn't seems to work */
-    tmp = virDomainDoStoreQuery(domain->conn, domain->id, "cpu_time");
-    if (tmp != NULL) {
-        info->cpuTime = atol(tmp);
-        VIR_FREE(tmp);
-    } else {
-        info->cpuTime = 0;
-    }
-#endif
-    snprintf(request, 199, "/local/domain/%d/cpu", domain->id);
-    request[199] = 0;
-    tmp2 = virConnectDoStoreList(domain->conn, request, &nb_vcpus);
-    if (tmp2 != NULL) {
-        info->nrVirtCpu = nb_vcpus;
-        VIR_FREE(tmp2);
-    }
-    return 0;
-}
-
-/**
- * xenStoreDomainGetState:
- * @domain: pointer to the domain block
- * @state: returned domain's state
- * @reason: returned state reason
- * @flags: additional flags, 0 for now
- *
- * Returns 0 in case of success, -1 in case of error.
- */
-int
-xenStoreDomainGetState(virDomainPtr domain,
-                       int *state,
-                       int *reason,
-                       unsigned int flags)
-{
-    char *running;
-
-    virCheckFlags(0, -1);
-
-    if (domain->id == -1)
-        return -1;
-
-    running = virDomainDoStoreQuery(domain->conn, domain->id, "running");
-
-    if (running && *running == '1')
-        *state = VIR_DOMAIN_RUNNING;
-    else
-        *state = VIR_DOMAIN_NOSTATE;
-    if (reason)
-        *reason = 0;
-
-    VIR_FREE(running);
-
-    return 0;
-}
-
-
 /**
  * xenStoreNumOfDomains:
  * @conn: pointer to the hypervisor connection

src/xen/xs_internal.h

@@ -26,19 +26,10 @@
 # include "internal.h"
 # include "driver.h"
 
-extern struct xenUnifiedDriver xenStoreDriver;
-int xenStoreInit (void);
-
 int		xenStoreOpen		(virConnectPtr conn,
                                          virConnectAuthPtr auth,
                                          unsigned int flags);
 int		xenStoreClose		(virConnectPtr conn);
-int		xenStoreGetDomainInfo	(virDomainPtr domain,
-                                         virDomainInfoPtr info);
-int		xenStoreDomainGetState	(virDomainPtr domain,
-                                         int *state,
-                                         int *reason,
-                                         unsigned int flags);
 int		xenStoreNumOfDomains	(virConnectPtr conn);
 int		xenStoreListDomains	(virConnectPtr conn,
                                          int *ids,