[libvirt PATCH v5 15/32] qemu: log error output from nbdkit
log stderr and stdout from nbdkit into its own log so that
nbdkit-related issues can be debugged more easily.
Signed-off-by: Jonathon Jongsma <jjongsma(a)redhat.com>
---
src/qemu/qemu_nbdkit.c | 30 +++++++++++++++++++++++++-----
1 file changed, 25 insertions(+), 5 deletions(-)
diff --git a/src/qemu/qemu_nbdkit.c b/src/qemu/qemu_nbdkit.c
index 5abccf1536..f2ff9552a3 100644
--- a/src/qemu/qemu_nbdkit.c
+++ b/src/qemu/qemu_nbdkit.c
@@ -850,15 +850,28 @@ qemuNbdkitProcessStart(qemuNbdkitProcess *proc,
int rc;
int exitstatus = 0;
int cmdret = 0;
- g_autofree char *errbuf = NULL;
virTimeBackOffVar timebackoff;
bool socketCreated = false;
+ g_autofree char *basename = g_strdup_printf("%s-nbdkit-%i",
vm->def->name, proc->source->id);
+ int logfd = -1;
+ g_autoptr(qemuLogContext) logContext = NULL;
+ g_autofree char *errmsg = NULL;
+ g_autoptr(virURI) uri = NULL;
+ g_autofree char *uristring = NULL;
if (!(cmd = qemuNbdkitProcessBuildCommand(proc)))
return -1;
+ if (!(logContext = qemuLogContextNew(driver, vm, basename))) {
+ virLastErrorPrefixMessage("%s", _("can't connect to
virtlogd"));
+ return -1;
+ }
+
+ logfd = qemuLogContextGetWriteFD(logContext);
+
VIR_DEBUG("starting nbdkit process for %s",
proc->source->nodestorage);
- virCommandSetErrorBuffer(cmd, &errbuf);
+ virCommandSetErrorFD(cmd, &logfd);
+ virCommandSetOutputFD(cmd, &logfd);
virCommandSetPidFile(cmd, proc->pidfile);
if (qemuExtDeviceLogCommand(driver, vm, cmd, "nbdkit") < 0)
@@ -902,9 +915,16 @@ qemuNbdkitProcessStart(qemuNbdkitProcess *proc,
return 0;
error:
- if (errbuf)
- virReportError(VIR_ERR_OPERATION_FAILED,
- _("nbdkit failed to start and reported: %s"), errbuf);
+ if (qemuLogContextReadFiltered(logContext, &errmsg, 1024) < 0)
+ VIR_WARN("Unable to read from nbdkit log");
+
+ if ((uri = qemuBlockStorageSourceGetURI(proc->source)))
+ uristring = virURIFormat(uri);
+
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Failed to connect to nbdkit for '%s': %s"),
+ NULLSTR(uristring), NULLSTR(errmsg));
+
qemuNbdkitProcessStop(proc);
return -1;
}
--
2.39.1