[PATCH V4 5/5] xen: add .domainSendSysrq method

[Chunyan Liu <cyliu@xxxxxxxx>]

Support sending sysrq key to guest.

Signed-off-by: Chunyan Liu <cyliu@xxxxxxxx>
---
 src/xen/xen_driver.c    | 21 +++++++++++++++++++++
 src/xen/xend_internal.c | 30 ++++++++++++++++++++++++++++++
 src/xen/xend_internal.h |  1 +
 3 files changed, 52 insertions(+)

diff --git a/src/xen/xen_driver.c b/src/xen/xen_driver.c
index c9f4159..4a56b69 100644
--- a/src/xen/xen_driver.c
+++ b/src/xen/xen_driver.c
@@ -2738,6 +2738,26 @@ xenUnifiedNodeSuspendForDuration(virConnectPtr conn,
     return nodeSuspendForDuration(target, duration, flags);
 }
 
+static int
+xenUnifiedDomainSendSysrq(virDomainPtr dom, char key, unsigned int flags)
+{
+    int ret = -1;
+    virDomainDefPtr def = NULL;
+
+    virCheckFlags(0, -1);
+
+    if (!(def = xenGetDomainDefForDom(dom)))
+        goto cleanup;
+
+    if (virDomainSendSysrqEnsureACL(dom->conn, def) < 0)
+        goto cleanup;
+
+    ret = xenDaemonDomainSysrq(dom->conn, def, key);
+
+ cleanup:
+    virDomainDefFree(def);
+    return ret;
+}
 
 /*----- Register with libvirt.c, and initialize Xen drivers. -----*/
 
@@ -2836,6 +2856,7 @@ static virHypervisorDriver xenUnifiedDriver = {
     .nodeSuspendForDuration = xenUnifiedNodeSuspendForDuration, /* 0.9.8 */
     .nodeGetMemoryParameters = xenUnifiedNodeGetMemoryParameters, /* 0.10.2 */
     .nodeSetMemoryParameters = xenUnifiedNodeSetMemoryParameters, /* 0.10.2 */
+    .domainSendSysrq = xenUnifiedDomainSendSysrq, /* 1.2.12 */
 };
 
 /**
diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c
index b233b6b..77af8a0 100644
--- a/src/xen/xend_internal.c
+++ b/src/xen/xend_internal.c
@@ -3300,6 +3300,36 @@ xenDaemonDomainBlockPeek(virConnectPtr conn,
     return ret;
 }
 
+/*
+ * xenDaemonDomainSysrq:
+ *  <at> conn: the connection object
+ *  <at> def: the domain to destroy
+ *  <at> key: SysRq key
+ *
+ * Send a sysrq to a domain.
+ *
+ * Returns 0 in case of success, -1 (with errno) in case of error.
+ */
+int
+xenDaemonDomainSysrq(virConnectPtr conn, virDomainDefPtr def, char key)
+{
+    char *buf;
+    int ret;
+
+    if (def->id < 0) {
+        virReportError(VIR_ERR_OPERATION_INVALID,
+                       _("Domain %s isn't running."), def->name);
+        return -1;
+    }
+
+    if (virAsprintf(&buf, "%c", key) < 0)
+        return -1;
+
+    ret = xend_op(conn, def->name, "op", "sysrq", "key", buf, NULL);
+
+    VIR_FREE(buf);
+    return ret;
+}
 
 /**
  * virDomainXMLDevID:
diff --git a/src/xen/xend_internal.h b/src/xen/xend_internal.h
index 814330d..02f9d9b 100644
--- a/src/xen/xend_internal.h
+++ b/src/xen/xend_internal.h
@@ -213,5 +213,6 @@ int xenDaemonSetSchedulerParameters(virConnectPtr conn,
                                     virDomainDefPtr def,
                                     virTypedParameterPtr params,
                                     int nparams);
+int xenDaemonDomainSysrq(virConnectPtr conn, virDomainDefPtr def, char key);
 
 #endif /* __XEND_INTERNAL_H_ */
-- 
1.8.4.5

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