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virsh-domain: Refactor error paths for cmdCPUStats

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This patch fixes the following issues in the cpu-stats virsh command:

1) Renames label failed_params to no_memory to match coding style
2) Uses proper typed parameter cleanup in error paths to avoid leaks
3) Adds a ret variable and simplifies error labels
4) Changes error message to a slightly more descriptive one and gets rid
   of the newline at the end:

Before:
$ virsh cpu-stats tr
error: Failed to virDomainGetCPUStats()

error: Requested operation is not valid: domain is not running

After:
$ tools/virsh cpu-stats tr
error: Failed to retrieve CPU statistics for domain 'tr'
error: Requested operation is not valid: domain is not running
This commit is contained in:
Peter Krempa 2013-01-22 12:17:18 +01:00
parent 35c30522a5
commit a54f25a946
1 changed files with 14 additions and 13 deletions
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27
tools/virsh-domain.c
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@ -6109,9 +6109,10 @@ cmdCPUStats(vshControl *ctl, const vshCmd *cmd)
{
virDomainPtr dom;
virTypedParameterPtr params = NULL;
int i, j, pos, max_id, cpu = -1, show_count = -1, nparams;
int i, j, pos, max_id, cpu = -1, show_count = -1, nparams = 0;
bool show_total = false, show_per_cpu = false;
unsigned int flags = 0;
bool ret = false;
if (!(dom = vshCommandOptDomain(ctl, cmd, NULL)))
return false;
@ -6151,7 +6152,7 @@ cmdCPUStats(vshControl *ctl, const vshCmd *cmd)
}
if (VIR_ALLOC_N(params, nparams * MIN(show_count, 128)) < 0)
goto failed_params;
goto no_memory;
while (show_count) {
int ncpus = MIN(show_count, 128);
@ -6199,8 +6200,8 @@ do_show_total:
goto cleanup;
}
if (VIR_ALLOC_N(params, nparams))
goto failed_params;
if (VIR_ALLOC_N(params, nparams) < 0)
goto no_memory;
/* passing start_cpu == -1 gives us domain's total status */
if ((nparams = virDomainGetCPUStats(dom, params, nparams, -1, 1, flags)) < 0)
@ -6222,22 +6223,22 @@ do_show_total:
VIR_FREE(s);
}
}
virTypedParamsFree(params, nparams);
ret = true;
cleanup:
virTypedParamsFree(params, nparams);
virDomainFree(dom);
return true;
return ret;
failed_params:
no_memory:
virReportOOMError();
virDomainFree(dom);
return false;
goto cleanup;
failed_stats:
vshError(ctl, _("Failed to virDomainGetCPUStats()\n"));
VIR_FREE(params);
virDomainFree(dom);
return false;
vshError(ctl, _("Failed to retrieve CPU statistics for domain '%s'"),
virDomainGetName(dom));
goto cleanup;
}
/*