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[libvirt] [v3] qemu: record timestamp in qemu domain log



Currently only support domain start and shutdown, for domain start,
record timestamp before the qemu command line, and for domain shutdown,
just say it's shutting down with timestamp.

* src/qemu/qemu_driver.c
---
 src/qemu/qemu_driver.c |   49 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 0612e69..1b03ef1 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -81,6 +81,7 @@
 #include "hooks.h"
 #include "storage_file.h"
 #include "virtaudit.h"
+#include "files.h"


 #define VIR_FROM_THIS VIR_FROM_QEMU
@@ -3866,6 +3867,7 @@ static int qemudStartVMDaemon(virConnectPtr conn,
     char ebuf[1024];
     char *pidfile = NULL;
     int logfile = -1;
+    char *timestamp;
     qemuDomainObjPrivatePtr priv = vm->privateData;

     struct qemudHookData hookData;
@@ -4053,7 +4055,17 @@ static int qemudStartVMDaemon(virConnectPtr conn,
             goto cleanup;
     }

+    if ((timestamp = virTimestamp()) == NULL) {
+        virReportOOMError();
+        goto cleanup;
+    } else if (safewrite(logfile, timestamp, strlen(timestamp)) < 0) {
+        VIR_WARN("Unable to write timestamp to logfile: %s",
+                 virStrerror(errno, ebuf, sizeof ebuf));
+        VIR_FREE(timestamp);
+    }
+
     tmp = progenv;
+
     while (*tmp) {
         if (safewrite(logfile, *tmp, strlen(*tmp)) < 0)
             VIR_WARN("Unable to write envv to logfile: %s",
@@ -4204,7 +4216,6 @@ cleanup:
     return -1;
 }

-
 static void qemudShutdownVMDaemon(struct qemud_driver *driver,
                                   virDomainObjPtr vm,
                                   int migrated) {
@@ -4214,10 +4225,45 @@ static void qemudShutdownVMDaemon(struct qemud_driver *driver,
     virErrorPtr orig_err;
     virDomainDefPtr def;
     int i;
+    int logfile = -1;
+    char *timestamp;
+    char ebuf[1024];

     VIR_DEBUG("Shutting down VM '%s' pid=%d migrated=%d",
               vm->def->name, vm->pid, migrated);

+    VIR_DEBUG0("Creating domain log file");
+    if ((logfile = qemudLogFD(driver, vm->def->name)) < 0) {
+        /* To not break the normal domain shutdown process, skip the
+         * timestamp log writing if failed on opening log file. */
+        VIR_WARN("Unable to open logfile: %s",
+                  virStrerror(errno, ebuf, sizeof ebuf));
+    } else {
+        if ((timestamp = virTimestamp()) == NULL) {
+            virReportOOMError();
+        } else {
+            char *shutdownMsg;
+
+            if ((virAsprintf(&shutdownMsg, "%s: shutting down\n",
+                             timestamp)) < 0) {
+                virReportOOMError();
+            } else {
+                if (safewrite(logfile, shutdownMsg, strlen(shutdownMsg)) < 0) {
+                    VIR_WARN("Unable to write shutdownMsg to logfile: %s",
+                              virStrerror(errno, ebuf, sizeof ebuf));
+                }
+
+                VIR_FREE(shutdownMsg);
+            }
+
+            VIR_FREE(timestamp);
+        }
+
+        if (VIR_CLOSE(logfile) < 0)
+             VIR_WARN("Unable to close logfile: %s",
+                      virStrerror(errno, ebuf, sizeof ebuf));
+    }
+
     /* This method is routinely used in clean up paths. Disable error
      * reporting so we don't squash a legit error. */
     orig_err = virSaveLastError();
@@ -4353,7 +4399,6 @@ retry:
     }
 }

-
 static virDrvOpenStatus qemudOpen(virConnectPtr conn,
                                   virConnectAuthPtr auth ATTRIBUTE_UNUSED,
                                   int flags ATTRIBUTE_UNUSED) {
--
1.7.2.3


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