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-rw-r--r--src/pmlogrewrite/metric.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/src/pmlogrewrite/metric.c b/src/pmlogrewrite/metric.c
new file mode 100644
index 0000000..31da308
--- /dev/null
+++ b/src/pmlogrewrite/metric.c
@@ -0,0 +1,230 @@
+/*
+ * Metric metadata support for pmlogrewrite
+ *
+ * Copyright (c) 2011 Ken McDonell. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include "pmapi.h"
+#include "impl.h"
+#include "logger.h"
+#include <assert.h>
+
+/*
+ * Find or create a new metricspec_t
+ */
+metricspec_t *
+start_metric(pmID pmid)
+{
+ metricspec_t *mp;
+ int sts;
+
+#if PCP_DEBUG
+ if ((pmDebug & (DBG_TRACE_APPL0 | DBG_TRACE_APPL1)) == (DBG_TRACE_APPL0 | DBG_TRACE_APPL1))
+ fprintf(stderr, "start_metric(%s)", pmIDStr(pmid));
+#endif
+
+ for (mp = metric_root; mp != NULL; mp = mp->m_next) {
+ if (pmid == mp->old_desc.pmid) {
+#if PCP_DEBUG
+ if ((pmDebug & (DBG_TRACE_APPL0 | DBG_TRACE_APPL1)) == (DBG_TRACE_APPL0 | DBG_TRACE_APPL1))
+ fprintf(stderr, " -> %s\n", mp->old_name);
+#endif
+ break;
+ }
+ }
+ if (mp == NULL) {
+ char *name;
+ pmDesc desc;
+
+ sts = pmNameID(pmid, &name);
+ if (sts < 0) {
+ if (wflag) {
+ snprintf(mess, sizeof(mess), "Metric %s pmNameID: %s", pmIDStr(pmid), pmErrStr(sts));
+ yywarn(mess);
+ }
+ return NULL;
+ }
+ sts = pmLookupDesc(pmid, &desc);
+ if (sts < 0) {
+ if (wflag) {
+ snprintf(mess, sizeof(mess), "Metric %s: pmLookupDesc: %s", pmIDStr(pmid), pmErrStr(sts));
+ yywarn(mess);
+ }
+ free(name);
+ return NULL;
+ }
+
+ mp = (metricspec_t *)malloc(sizeof(metricspec_t));
+ if (mp == NULL) {
+ fprintf(stderr, "metricspec malloc(%d) failed: %s\n", (int)sizeof(metricspec_t), strerror(errno));
+ abandon();
+ /*NOTREACHED*/
+ }
+ mp->m_next = metric_root;
+ metric_root = mp;
+ mp->output = OUTPUT_ALL;
+ mp->one_inst = 0;
+ mp->one_name = NULL;
+ mp->old_name = name;
+ mp->old_desc = desc;
+ mp->new_desc = mp->old_desc;
+ mp->flags = 0;
+ mp->ip = NULL;
+#if PCP_DEBUG
+ if ((pmDebug & (DBG_TRACE_APPL0 | DBG_TRACE_APPL1)) == (DBG_TRACE_APPL0 | DBG_TRACE_APPL1))
+ fprintf(stderr, " -> %s [new entry]\n", mp->old_name);
+#endif
+ }
+
+ return mp;
+}
+
+typedef struct {
+ __pmLogHdr hdr;
+ pmDesc desc;
+ int numnames;
+ char strbuf[1];
+} desc_t;
+
+/*
+ * reverse the logic of __pmLogPutDesc()
+ */
+static void
+_pmUnpackDesc(__pmPDU *pdubuf, pmDesc *desc, int *numnames, char ***names)
+{
+ desc_t *pp;
+ int i;
+ char *p;
+ int slen;
+
+ pp = (desc_t *)pdubuf;
+ desc->type = ntohl(pp->desc.type);
+ desc->sem = ntohl(pp->desc.sem);
+ desc->indom = ntoh_pmInDom(pp->desc.indom);
+ desc->units = ntoh_pmUnits(pp->desc.units);
+ desc->pmid = ntoh_pmID(pp->desc.pmid);
+ *numnames = ntohl(pp->numnames);
+ *names = (char **)malloc(*numnames * sizeof(*names[1]));
+ if (*names == NULL) {
+ fprintf(stderr, "_pmUnpackDesc malloc(%d) failed: %s\n", (int)(*numnames * sizeof(*names[1])), strerror(errno));
+ abandon();
+ /*NOTREACHED*/
+ }
+
+ p = pp->strbuf;
+ for (i = 0; i < *numnames; i++) {
+ memcpy(&slen, p, LENSIZE);
+ slen = ntohl(slen);
+ p += LENSIZE;
+ (*names)[i] = malloc(slen+1);
+ if ((*names)[i] == NULL) {
+ fprintf(stderr, "_pmUnpackDesc malloc(%d) failed: %s\n", slen+1, strerror(errno));
+ abandon();
+ /*NOTREACHED*/
+ }
+ strncpy((*names)[i], p, slen);
+ (*names)[i][slen] = '\0';
+ p += slen;
+ }
+
+ return;
+}
+
+/*
+ * rewrite pmDesc from metadata, returns
+ * -1 delete this pmDesc
+ * 0 no change
+ * 1 changed
+ */
+void
+do_desc(void)
+{
+ metricspec_t *mp;
+ pmDesc desc;
+ int i;
+ int sts;
+ int numnames;
+ char **names;
+ long out_offset;
+
+ out_offset = ftell(outarch.logctl.l_mdfp);
+ _pmUnpackDesc(inarch.metarec, &desc, &numnames, &names);
+
+ for (mp = metric_root; mp != NULL; mp = mp->m_next) {
+ if (desc.pmid != mp->old_desc.pmid || mp->flags == 0)
+ continue;
+ if (mp->flags & METRIC_DELETE) {
+#if PCP_DEBUG
+ if (pmDebug & DBG_TRACE_APPL1)
+ fprintf(stderr, "Delete: pmDesc for %s\n", pmIDStr(desc.pmid));
+#endif
+ goto done;
+ }
+#if PCP_DEBUG
+ if (pmDebug & DBG_TRACE_APPL1)
+ fprintf(stderr, "Rewrite: pmDesc for %s\n", pmIDStr(desc.pmid));
+#endif
+ if (mp->flags & METRIC_CHANGE_PMID)
+ desc.pmid = mp->new_desc.pmid;
+ if (mp->flags & METRIC_CHANGE_NAME) {
+ for (i = 0; i < numnames; i++) {
+ if (strcmp(names[i], mp->old_name) == 0) {
+ free(names[i]);
+ names[i] = strdup(mp->new_name);
+ if (names[i] == NULL) {
+ fprintf(stderr, "do_desc strdup(%s) failed: %s\n", mp->new_name, strerror(errno));
+ abandon();
+ /*NOTREACHED*/
+ }
+ break;
+ }
+ }
+ if (i == numnames) {
+ fprintf(stderr, "%s: Botch: old name %s not found in list of %d names for pmid %s ...",
+ pmProgname, mp->old_name, numnames, pmIDStr(mp->old_desc.pmid));
+ for (i = 0; i < numnames; i++) {
+ if (i > 0) fputc(',', stderr);
+ fprintf(stderr, " %s", names[i]);
+ }
+ fputc('\n', stderr);
+ abandon();
+ /*NOTREACHED*/
+ }
+ }
+ if (mp->flags & METRIC_CHANGE_TYPE)
+ desc.type = mp->new_desc.type;
+ if (mp->flags & METRIC_CHANGE_INDOM)
+ desc.indom = mp->new_desc.indom;
+ if (mp->flags & METRIC_CHANGE_SEM)
+ desc.sem = mp->new_desc.sem;
+ if (mp->flags & METRIC_CHANGE_UNITS)
+ desc.units = mp->new_desc.units; /* struct assignment */
+ break;
+ }
+ if ((sts = __pmLogPutDesc(&outarch.logctl, &desc, numnames, names)) < 0) {
+ fprintf(stderr, "%s: Error: __pmLogPutDesc: %s (%s): %s\n",
+ pmProgname, names[0], pmIDStr(desc.pmid), pmErrStr(sts));
+ abandon();
+ /*NOTREACHED*/
+ }
+#if PCP_DEBUG
+ if (pmDebug & DBG_TRACE_APPL0)
+ fprintf(stderr, "Metadata: write PMID %s @ offset=%ld\n", pmIDStr(desc.pmid), out_offset);
+#endif
+
+done:
+ for (i = 0; i < numnames; i++)
+ free(names[i]);
+ free(names);
+ return;
+}
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