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Add API for issuing 'info blockstats' command
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Add a new qemuMonitorGetBlockStatsInfo() command * src/qemu/qemu_driver.c: Remove directly use of blockstats in favour of calling qemuMonitorGetBlockStatsInfo()
This commit is contained in:
Daniel P. Berrange
parent
316e9f9032
commit
f225e560de
@ -5957,10 +5957,7 @@ qemudDomainBlockStats (virDomainPtr dom,
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struct _virDomainBlockStats *stats)
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{
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struct qemud_driver *driver = dom->conn->privateData;
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char *dummy, *info = NULL;
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const char *p, *eol;
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const char *qemu_dev_name = NULL;
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size_t len;
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int i, ret = -1;
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virDomainObjPtr vm;
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virDomainDiskDefPtr disk = NULL;
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@ -5997,95 +5994,19 @@ qemudDomainBlockStats (virDomainPtr dom,
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qemu_dev_name = qemudDiskDeviceName(dom->conn, disk);
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if (!qemu_dev_name)
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goto cleanup;
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len = strlen (qemu_dev_name);
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if (qemudMonitorCommand (vm, "info blockstats", &info) < 0) {
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qemudReportError (dom->conn, dom, NULL, VIR_ERR_OPERATION_FAILED,
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"%s", _("'info blockstats' command failed"));
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if (qemuMonitorGetBlockStatsInfo(vm, qemu_dev_name,
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&stats->rd_req,
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&stats->rd_bytes,
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&stats->wr_req,
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&stats->wr_bytes,
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&stats->errs) < 0)
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goto cleanup;
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}
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DEBUG ("%s: info blockstats reply: %s", vm->def->name, info);
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/* If the command isn't supported then qemu prints the supported
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* info commands, so the output starts "info ". Since this is
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* unlikely to be the name of a block device, we can use this
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* to detect if qemu supports the command.
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*/
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if (strstr(info, "\ninfo ")) {
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qemudReportError (dom->conn, dom, NULL, VIR_ERR_NO_SUPPORT,
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"%s",
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_("'info blockstats' not supported by this qemu"));
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goto cleanup;
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}
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stats->rd_req = -1;
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stats->rd_bytes = -1;
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stats->wr_req = -1;
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stats->wr_bytes = -1;
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stats->errs = -1;
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/* The output format for both qemu & KVM is:
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* blockdevice: rd_bytes=% wr_bytes=% rd_operations=% wr_operations=%
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* (repeated for each block device)
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* where '%' is a 64 bit number.
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*/
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p = info;
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while (*p) {
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if (STREQLEN (p, qemu_dev_name, len)
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&& p[len] == ':' && p[len+1] == ' ') {
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eol = strchr (p, '\n');
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if (!eol)
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eol = p + strlen (p);
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p += len+2; /* Skip to first label. */
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while (*p) {
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if (STRPREFIX (p, "rd_bytes=")) {
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p += 9;
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if (virStrToLong_ll (p, &dummy, 10, &stats->rd_bytes) == -1)
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DEBUG ("%s: error reading rd_bytes: %s",
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vm->def->name, p);
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} else if (STRPREFIX (p, "wr_bytes=")) {
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p += 9;
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if (virStrToLong_ll (p, &dummy, 10, &stats->wr_bytes) == -1)
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DEBUG ("%s: error reading wr_bytes: %s",
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vm->def->name, p);
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} else if (STRPREFIX (p, "rd_operations=")) {
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p += 14;
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if (virStrToLong_ll (p, &dummy, 10, &stats->rd_req) == -1)
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DEBUG ("%s: error reading rd_req: %s",
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vm->def->name, p);
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} else if (STRPREFIX (p, "wr_operations=")) {
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p += 14;
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if (virStrToLong_ll (p, &dummy, 10, &stats->wr_req) == -1)
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DEBUG ("%s: error reading wr_req: %s",
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vm->def->name, p);
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} else
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DEBUG ("%s: unknown block stat near %s", vm->def->name, p);
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/* Skip to next label. */
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p = strchr (p, ' ');
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if (!p || p >= eol) break;
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p++;
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}
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ret = 0;
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goto cleanup;
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}
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/* Skip to next line. */
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p = strchr (p, '\n');
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if (!p) break;
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p++;
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}
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/* If we reach here then the device was not found. */
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qemudReportError (dom->conn, dom, NULL, VIR_ERR_INVALID_ARG,
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_("device not found: %s (%s)"), path, qemu_dev_name);
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cleanup:
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cleanup:
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VIR_FREE(qemu_dev_name);
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VIR_FREE(info);
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if (vm)
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virDomainObjUnlock(vm);
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return ret;
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@ -671,6 +671,111 @@ cleanup:
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}
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int qemuMonitorGetBlockStatsInfo(const virDomainObjPtr vm,
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const char *devname,
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long long *rd_req,
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long long *rd_bytes,
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long long *wr_req,
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long long *wr_bytes,
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long long *errs)
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{
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char *info = NULL;
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int ret = -1;
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char *dummy;
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const char *p, *eol;
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int devnamelen = strlen(devname);
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if (qemudMonitorCommand (vm, "info blockstats", &info) < 0) {
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qemudReportError (NULL, NULL, NULL, VIR_ERR_OPERATION_FAILED,
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"%s", _("'info blockstats' command failed"));
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goto cleanup;
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}
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DEBUG ("%s: info blockstats reply: %s", vm->def->name, info);
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/* If the command isn't supported then qemu prints the supported
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* info commands, so the output starts "info ". Since this is
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* unlikely to be the name of a block device, we can use this
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* to detect if qemu supports the command.
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*/
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if (strstr(info, "\ninfo ")) {
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qemudReportError (NULL, NULL, NULL, VIR_ERR_NO_SUPPORT,
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"%s",
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_("'info blockstats' not supported by this qemu"));
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goto cleanup;
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}
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*rd_req = -1;
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*rd_bytes = -1;
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*wr_req = -1;
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*wr_bytes = -1;
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*errs = -1;
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/* The output format for both qemu & KVM is:
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* blockdevice: rd_bytes=% wr_bytes=% rd_operations=% wr_operations=%
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* (repeated for each block device)
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* where '%' is a 64 bit number.
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*/
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p = info;
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while (*p) {
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if (STREQLEN (p, devname, devnamelen)
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&& p[devnamelen] == ':' && p[devnamelen+1] == ' ') {
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eol = strchr (p, '\n');
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if (!eol)
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eol = p + strlen (p);
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p += devnamelen+2; /* Skip to first label. */
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while (*p) {
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if (STRPREFIX (p, "rd_bytes=")) {
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p += 9;
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if (virStrToLong_ll (p, &dummy, 10, rd_bytes) == -1)
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DEBUG ("%s: error reading rd_bytes: %s",
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vm->def->name, p);
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} else if (STRPREFIX (p, "wr_bytes=")) {
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p += 9;
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if (virStrToLong_ll (p, &dummy, 10, wr_bytes) == -1)
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DEBUG ("%s: error reading wr_bytes: %s",
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vm->def->name, p);
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} else if (STRPREFIX (p, "rd_operations=")) {
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p += 14;
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if (virStrToLong_ll (p, &dummy, 10, rd_req) == -1)
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DEBUG ("%s: error reading rd_req: %s",
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vm->def->name, p);
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} else if (STRPREFIX (p, "wr_operations=")) {
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p += 14;
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if (virStrToLong_ll (p, &dummy, 10, wr_req) == -1)
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DEBUG ("%s: error reading wr_req: %s",
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vm->def->name, p);
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} else
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DEBUG ("%s: unknown block stat near %s", vm->def->name, p);
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/* Skip to next label. */
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p = strchr (p, ' ');
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if (!p || p >= eol) break;
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p++;
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}
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ret = 0;
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goto cleanup;
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}
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/* Skip to next line. */
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p = strchr (p, '\n');
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if (!p) break;
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p++;
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}
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/* If we reach here then the device was not found. */
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qemudReportError (NULL, NULL, NULL, VIR_ERR_INVALID_ARG,
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_("no stats found for device %s"), devname);
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cleanup:
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VIR_FREE(info);
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return ret;
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}
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int qemuMonitorSetVNCPassword(const virDomainObjPtr vm,
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const char *password)
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{
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@ -75,6 +75,14 @@ int qemuMonitorGetCPUInfo(const virDomainObjPtr vm,
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int **pids);
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int qemuMonitorGetBalloonInfo(const virDomainObjPtr vm,
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unsigned long *currmem);
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int qemuMonitorGetBlockStatsInfo(const virDomainObjPtr vm,
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const char *devname,
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long long *rd_req,
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long long *rd_bytes,
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long long *wr_req,
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long long *wr_bytes,
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long long *errs);
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int qemuMonitorSetVNCPassword(const virDomainObjPtr vm,
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const char *password);
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