On 2018年07月31日 06:09, John Ferlan wrote:
On 07/29/2018 11:12 PM, bing.niu@xxxxxxxxx wrote:
From: Bing Niu <bing.niu@xxxxxxxxx>
Introduce virResctrlAllocMemoryBandwidthFormat and
virResctrlAllocParseMemoryBandwidthLine which will format
and parse an entry in the schemata file for MBA.
Signed-off-by: Bing Niu <bing.niu@xxxxxxxxx>
---
src/util/virresctrl.c | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 141 insertions(+)
diff --git a/src/util/virresctrl.c b/src/util/virresctrl.c
index 8a25798..1cbf9b3 100644
--- a/src/util/virresctrl.c
+++ b/src/util/virresctrl.c
@@ -986,6 +986,139 @@ virResctrlAllocGetID(virResctrlAllocPtr alloc)
[....]
+/* Parse a schemata formatted MB: entry. Format details are described in
+ * virResctrlAllocMemoryBandwidthFormat.
+ */
+static int
+virResctrlAllocParseMemoryBandwidthLine(virResctrlInfoPtr resctrl,
+ virResctrlAllocPtr alloc,
+ char *line)
+{
+ char **mbs = NULL;
+ char *tmp = NULL;
+ size_t nmbs = 0;
+ size_t i;
+ int ret = -1;
+
+ /* For no reason there can be spaces */
+ virSkipSpaces((const char **) &line);
+
+ if (STRNEQLEN(line, "MB", 2))
+ return 0;
+
+ if (!resctrl || !resctrl->membw_info ||
+ !resctrl->membw_info->min_bandwidth ||
+ !resctrl->membw_info->bandwidth_granularity) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Missing or inconsistent resctrl info for "
+ "memory bandwidth allocation"));
I assume a return -1 is in order here.
Missed this earlier, but the Coverity checker found it.
Yes. I miss this and should return -1 here.
+ }
+
+ if (!alloc->mem_bw) {
+ if (VIR_ALLOC(alloc->mem_bw) < 0)
+ return -1;
+ }
+
+ tmp = strchr(line, ':');
+ if (!tmp)
+ return 0;
+ tmp++;
+
+ mbs = virStringSplitCount(tmp, ";", 0, &nmbs);
+ if (nmbs == 0)
+ return 0;
As strange as this is - the above 2 aren't necessary given the next for
loop. Keeping them cause Coverity to whine that virStringSplitCount can
return allocated memory which is then leaked. It's a false positive, but
avoidable.
Yes my bad, sorry.
I saw virStringSplitCount will return a pointer array even 0 delim
found. And this pointer array need to do a virStringListFree.
Should change like:
mbs = virStringSplitCount(tmp, ";", 0, &nmbs);
if (mbs == 0)
return 0;
Bing
+
+ for (i = 0; i < nmbs; i++) {
+ if (virResctrlAllocParseProcessMemoryBandwidth(resctrl, alloc, mbs[i]) < 0)
+ goto cleanup;
+ }
+ ret = 0;
+ cleanup:
+ virStringListFree(mbs);
+ return ret;
+}
+
+
[...]
I'll adjust in my branch before pushing.
John
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