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qemu: silence coverity warnings

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Coverity warns if the majority of callers check a function for
errors, but a few don't; but in qemu_audit and qemu_domain, the
choice to not check for failures was safe.  In qemu_command, the
failure to generate a uuid can only occur on a bad pointer.

* src/qemu/qemu_audit.c (qemuAuditCgroup): Ignore failure to get
  cgroup controller.
* src/qemu/qemu_domain.c (qemuDomainObjEnterMonitor)
  (qemuDomainObjEnterMonitorWithDriver): Ignore failure to get
  timestamp.
* src/qemu/qemu_command.c (qemuParseCommandLine): Check for error.
This commit is contained in:
Eric Blake 2011-07-04 10:23:46 +08:00 committed by Daniel Veillard
parent 6e07f72ee5
commit aaea56dc99
3 changed files with 11 additions and 5 deletions
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6
src/qemu/qemu_audit.c
View File

@ -31,6 +31,7 @@
#include "uuid.h"
#include "logging.h"
#include "memory.h"
#include "ignore-value.h"
/* Return nn:mm in hex for block and character devices, and NULL
* for other file types, stat failure, or allocation failure. */
@ -264,8 +265,9 @@ qemuAuditCgroup(virDomainObjPtr vm, virCgroupPtr cgroup,
return;
}
virCgroupPathOfController(cgroup, VIR_CGROUP_CONTROLLER_DEVICES,
NULL, &controller);
ignore_value(virCgroupPathOfController(cgroup,
VIR_CGROUP_CONTROLLER_DEVICES,
NULL, &controller));
detail = virAuditEncode("cgroup", VIR_AUDIT_STR(controller));
VIR_AUDIT(VIR_AUDIT_RECORD_RESOURCE, success,

6
src/qemu/qemu_command.c
View File

@ -5842,7 +5842,11 @@ virDomainDefPtr qemuParseCommandLine(virCapsPtr caps,
if (VIR_ALLOC(cmd) < 0)
goto no_memory;
virUUIDGenerate(def->uuid);
if (virUUIDGenerate(def->uuid) < 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("failed to generate uuid"));
goto error;
}
def->id = -1;
def->mem.cur_balloon = def->mem.max_balloon = 64 * 1024;

4
src/qemu/qemu_domain.c
View File

@ -608,7 +608,7 @@ void qemuDomainObjEnterMonitor(virDomainObjPtr obj)
qemuMonitorLock(priv->mon);
qemuMonitorRef(priv->mon);
virTimeMs(&priv->monStart);
ignore_value(virTimeMs(&priv->monStart));
virDomainObjUnlock(obj);
}
@ -651,7 +651,7 @@ void qemuDomainObjEnterMonitorWithDriver(struct qemud_driver *driver,
qemuMonitorLock(priv->mon);
qemuMonitorRef(priv->mon);
virTimeMs(&priv->monStart);
ignore_value(virTimeMs(&priv->monStart));
virDomainObjUnlock(obj);
qemuDriverUnlock(driver);
}