[libvirt] [PATCH libvirt] qemu: log the crash information for S390

[Bjoern Walk]

Since QEMU 2.12 guest crash information for S390 is available in the
QEMU monitor, e.g.:

  {
    "timestamp": {
        "seconds": 1518004739,
        "microseconds": 552563
    },
    "event": "GUEST_PANICKED",
    "data": {
        "action": "pause",
        "info": {
            "core": 0,
            "psw-addr": 1102832,
            "reason": "disabled-wait",
            "psw-mask": 562956395872256,
            "type": "s390"
        }
    }
  }

Let's log this information into the domain log file, e.g.:

    2018-02-08 13:11:26.075+0000: panic s390: core='0' psw-mask='0x0002000180000000' psw-addr='0x000000000010f146' reason='disabled-wait'

Reviewed-by: Boris Fiuczynski <fiuczy at linux.vnet.ibm.com>
Signed-off-by: Bjoern Walk <bwalk at linux.vnet.ibm.com>
---
 src/qemu/qemu_monitor.c      | 19 ++++++++++++++++++-
 src/qemu/qemu_monitor.h      | 12 ++++++++++++
 src/qemu/qemu_monitor_json.c | 40 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 9b5ad72c..8c394583 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4363,7 +4363,14 @@ qemuMonitorGuestPanicEventInfoFormatMsg(qemuMonitorEventPanicInfoPtr info)
                                  info->data.hyperv.arg3, info->data.hyperv.arg4,
                                  info->data.hyperv.arg5));
         break;
-
+    case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_S390:
+        ignore_value(virAsprintf(&ret, "s390: core='%d' psw-mask='0x%016llx' "
+                                 "psw-addr='0x%016llx' reason='%s'",
+                                 info->data.s390.core,
+                                 info->data.s390.psw_mask,
+                                 info->data.s390.psw_addr,
+                                 info->data.s390.reason));
+        break;
     case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_NONE:
     case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_LAST:
         break;
@@ -4379,6 +4386,16 @@ qemuMonitorEventPanicInfoFree(qemuMonitorEventPanicInfoPtr info)
     if (!info)
         return;
 
+    switch (info->type) {
+    case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_S390:
+        VIR_FREE(info->data.s390.reason);
+        break;
+    case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_NONE:
+    case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_HYPERV:
+    case QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_LAST:
+        break;
+    }
+
     VIR_FREE(info);
 }
 
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index ea0c01ae..4b3a5e21 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -73,6 +73,7 @@ struct _qemuMonitorMessage {
 typedef enum {
     QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_NONE = 0,
     QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_HYPERV,
+    QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_S390,
 
     QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_LAST
 } qemuMonitorEventPanicInfoType;
@@ -88,12 +89,23 @@ struct _qemuMonitorEventPanicInfoHyperv {
     unsigned long long arg5;
 };
 
+typedef struct _qemuMonitorEventPanicInfoS390 qemuMonitorEventPanicInfoS390;
+typedef qemuMonitorEventPanicInfoS390 *qemuMonitorEventPanicInfoS390Ptr;
+struct _qemuMonitorEventPanicInfoS390 {
+    /* S390 specific guest panic information */
+    int core;
+    unsigned long long psw_mask;
+    unsigned long long psw_addr;
+    char *reason;
+};
+
 typedef struct _qemuMonitorEventPanicInfo qemuMonitorEventPanicInfo;
 typedef qemuMonitorEventPanicInfo *qemuMonitorEventPanicInfoPtr;
 struct _qemuMonitorEventPanicInfo {
     qemuMonitorEventPanicInfoType type;
     union {
         qemuMonitorEventPanicInfoHyperv hyperv;
+        qemuMonitorEventPanicInfoS390 s390;
     } data;
 };
 
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 242b92ea..5c1f6836 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -576,6 +576,44 @@ qemuMonitorJSONGuestPanicExtractInfoHyperv(virJSONValuePtr data)
     return NULL;
 }
 
+static qemuMonitorEventPanicInfoPtr
+qemuMonitorJSONGuestPanicExtractInfoS390(virJSONValuePtr data)
+{
+    qemuMonitorEventPanicInfoPtr ret;
+    int core;
+    unsigned long long psw_mask, psw_addr;
+    const char *reason = NULL;
+
+    if (VIR_ALLOC(ret) < 0)
+        return NULL;
+
+    ret->type = QEMU_MONITOR_EVENT_PANIC_INFO_TYPE_S390;
+
+    if (virJSONValueObjectGetNumberInt(data, "core", &core) < 0 ||
+        virJSONValueObjectGetNumberUlong(data, "psw-mask", &psw_mask) < 0 ||
+        virJSONValueObjectGetNumberUlong(data, "psw-addr", &psw_addr) < 0) {
+        goto error;
+    }
+
+    ret->data.s390.core = core;
+    ret->data.s390.psw_mask = psw_mask;
+    ret->data.s390.psw_addr = psw_addr;
+
+    reason = virJSONValueObjectGetString(data, "reason");
+    if (!reason)
+        goto error;
+
+    if (VIR_STRDUP(ret->data.s390.reason, reason) < 0)
+        goto no_memory;
+
+    return ret;
+
+ error:
+    virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("malformed s390 panic data"));
+ no_memory:
+    qemuMonitorEventPanicInfoFree(ret);
+    return NULL;
+}
 
 static qemuMonitorEventPanicInfoPtr
 qemuMonitorJSONGuestPanicExtractInfo(virJSONValuePtr data)
@@ -584,6 +622,8 @@ qemuMonitorJSONGuestPanicExtractInfo(virJSONValuePtr data)
 
     if (STREQ_NULLABLE(type, "hyper-v"))
         return qemuMonitorJSONGuestPanicExtractInfoHyperv(data);
+    else if (STREQ_NULLABLE(type, "s390"))
+        return qemuMonitorJSONGuestPanicExtractInfoS390(data);
 
     virReportError(VIR_ERR_INTERNAL_ERROR,
                    _("unknown panic info type '%s'"), NULLSTR(type));
-- 
2.13.4