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qemu: Get memory balloon info correctly for text monitor

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* src/qemu/qemu_monitor_text.c: BALLOON_PREFIX was defined as
"balloon: actual=", which cause "actual=" is stripped early before
the real parsing. This patch changes BALLOON_PREFIX into "balloon: ",
and modifies related functions, also renames
"qemuMonitorParseExtraBalloonInfo" to "qemuMonitorParseBalloonInfo",
as after the changing, it parses all the info returned by "info balloon".
This commit is contained in:
Osier Yang 2011-08-19 21:34:59 +08:00
parent b14df8bec0
commit 4ffa7530a4
1 changed files with 36 additions and 19 deletions
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55
src/qemu/qemu_monitor_text.c
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@ -547,13 +547,17 @@ static int parseMemoryStat(char **text, unsigned int tag,
return 0;
}
/* Convert bytes to kilobytes for libvirt */
switch (tag) {
/* Convert megabytes to kilobytes for libvirt */
case VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON:
value <<= 10;
break;
/* Convert bytes to kilobytes for libvirt */
case VIR_DOMAIN_MEMORY_STAT_SWAP_IN:
case VIR_DOMAIN_MEMORY_STAT_SWAP_OUT:
case VIR_DOMAIN_MEMORY_STAT_UNUSED:
case VIR_DOMAIN_MEMORY_STAT_AVAILABLE:
value = value >> 10;
value >>= 10;
}
stat->tag = tag;
stat->val = value;
@ -563,15 +567,25 @@ static int parseMemoryStat(char **text, unsigned int tag,
}
/* The reply from the 'info balloon' command may contain additional memory
* statistics in the form: '[,<tag>=<val>]*'
* statistics in the form: 'actual=<val> [,<tag>=<val>]*'
*/
static int qemuMonitorParseExtraBalloonInfo(char *text,
virDomainMemoryStatPtr stats,
unsigned int nr_stats)
static int qemuMonitorParseBalloonInfo(char *text,
virDomainMemoryStatPtr stats,
unsigned int nr_stats)
{
char *p = text;
unsigned int nr_stats_found = 0;
/* Since "actual=" always comes first in the returned string,
* and sometime we only care about the value of "actual", such
* as qemuMonitorGetBalloonInfo, we parse it outside of the
* loop.
*/
if (parseMemoryStat(&p, VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON,
"actual=", &stats[nr_stats_found]) == 1) {
nr_stats_found++;
}
while (*p && nr_stats_found < nr_stats) {
if (parseMemoryStat(&p, VIR_DOMAIN_MEMORY_STAT_SWAP_IN,
",mem_swapped_in=", &stats[nr_stats_found]) ||
@ -584,9 +598,7 @@ static int qemuMonitorParseExtraBalloonInfo(char *text,
parseMemoryStat(&p, VIR_DOMAIN_MEMORY_STAT_UNUSED,
",free_mem=", &stats[nr_stats_found]) ||
parseMemoryStat(&p, VIR_DOMAIN_MEMORY_STAT_AVAILABLE,
",total_mem=", &stats[nr_stats_found]) ||
parseMemoryStat(&p, VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON,
",actual=", &stats[nr_stats_found]))
",total_mem=", &stats[nr_stats_found]))
nr_stats_found++;
/* Skip to the next label. When *p is ',' the last match attempt
@ -602,7 +614,7 @@ static int qemuMonitorParseExtraBalloonInfo(char *text,
/* The reply from QEMU contains 'ballon: actual=421' where value is in MB */
#define BALLOON_PREFIX "balloon: actual="
#define BALLOON_PREFIX "balloon: "
/*
* Returns: 0 if balloon not supported, +1 if balloon query worked
@ -622,15 +634,22 @@ int qemuMonitorTextGetBalloonInfo(qemuMonitorPtr mon,
}
if ((offset = strstr(reply, BALLOON_PREFIX)) != NULL) {
unsigned int memMB;
char *end;
offset += strlen(BALLOON_PREFIX);
if (virStrToLong_ui(offset, &end, 10, &memMB) < 0) {
qemuReportError(VIR_ERR_OPERATION_FAILED,
_("could not parse memory balloon allocation from '%s'"), reply);
struct _virDomainMemoryStat stats[1];
if (qemuMonitorParseBalloonInfo(offset, stats, 1) == 0) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected balloon information '%s'"), reply);
goto cleanup;
}
*currmem = memMB * 1024;
if (stats[0].tag != VIR_DOMAIN_MEMORY_STAT_ACTUAL_BALLOON) {
qemuReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected balloon information '%s'"), reply);
goto cleanup;
}
*currmem = stats[0].val;
ret = 1;
} else {
/* We don't raise an error here, since its to be expected that
@ -660,9 +679,7 @@ int qemuMonitorTextGetMemoryStats(qemuMonitorPtr mon,
if ((offset = strstr(reply, BALLOON_PREFIX)) != NULL) {
offset += strlen(BALLOON_PREFIX);
if ((offset = strchr(offset, ',')) != NULL) {
ret = qemuMonitorParseExtraBalloonInfo(offset, stats, nr_stats);
}
ret = qemuMonitorParseBalloonInfo(offset, stats, nr_stats);
}
VIR_FREE(reply);