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/*
* 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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