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qemu: Use qemuGetCompressionProgram for error paths

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Let's do some more code reuse - there are 3 other callers that care to
check/get the compress program. Each of those though cares whether the
requested cfg image is valid and exists. So, add a parameter to handle
those cases.

NB: We won't need to initialize the returned value in the case where
the cfg image doesn't exist since the called program will handle that.
This commit is contained in:
John Ferlan 2016-09-13 10:11:00 -04:00
parent 4052ac2726
commit 48cb9f0542
1 changed files with 43 additions and 60 deletions
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103
src/qemu/qemu_driver.c
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@ -3271,6 +3271,9 @@ qemuCompressProgramAvailable(virQEMUSaveFormat compress)
* @imageFormat: String representation from qemu.conf for the compression
* image format being used (dump, save, or snapshot).
* @styleFormat: String representing the style of format (dump, save, snapshot)
* @use_raw_on_fail: Boolean indicating how to handle the error path. For
* callers that are OK with invalid data or inability to
* find the compression program, just return a raw format
*
* Returns:
* virQEMUSaveFormat - Integer representation of the compression
@ -3282,7 +3285,8 @@ qemuCompressProgramAvailable(virQEMUSaveFormat compress)
*/
static virQEMUSaveFormat
qemuGetCompressionProgram(const char *imageFormat,
const char *styleFormat)
const char *styleFormat,
bool use_raw_on_fail)
{
virQEMUSaveFormat ret;
@ -3298,18 +3302,34 @@ qemuGetCompressionProgram(const char *imageFormat,
return ret;
error:
if (ret < 0)
VIR_WARN("Invalid %s image format specified in "
"configuration file, using raw",
styleFormat);
else
VIR_WARN("Compression program for %s image format in "
"configuration file isn't available, using raw",
styleFormat);
if (ret < 0) {
if (use_raw_on_fail)
VIR_WARN("Invalid %s image format specified in "
"configuration file, using raw",
styleFormat);
else
virReportError(VIR_ERR_OPERATION_FAILED,
_("Invalid %s image format specified "
"in configuration file"),
styleFormat);
} else {
if (use_raw_on_fail)
VIR_WARN("Compression program for %s image format in "
"configuration file isn't available, using raw",
styleFormat);
else
virReportError(VIR_ERR_OPERATION_FAILED,
_("Compression program for %s image format "
"in configuration file isn't available"),
styleFormat);
}
/* Use "raw" as the format if the specified format is not valid,
* or the compress program is not available. */
return QEMU_SAVE_FORMAT_RAW;
if (use_raw_on_fail)
return QEMU_SAVE_FORMAT_RAW;
return -1;
}
@ -3318,7 +3338,7 @@ qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
int compressed = QEMU_SAVE_FORMAT_RAW;
int compressed;
int ret = -1;
virDomainObjPtr vm = NULL;
virQEMUDriverConfigPtr cfg = NULL;
@ -3328,21 +3348,9 @@ qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
VIR_DOMAIN_SAVE_PAUSED, -1);
cfg = virQEMUDriverGetConfig(driver);
if (cfg->saveImageFormat) {
compressed = qemuSaveCompressionTypeFromString(cfg->saveImageFormat);
if (compressed < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Invalid save image format specified "
"in configuration file"));
goto cleanup;
}
if (!qemuCompressProgramAvailable(compressed)) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Compression program for image format "
"in configuration file isn't available"));
goto cleanup;
}
}
if ((compressed = qemuGetCompressionProgram(cfg->saveImageFormat,
"save", false)) < 0)
goto cleanup;
if (!(vm = qemuDomObjFromDomain(dom)))
goto cleanup;
@ -3391,7 +3399,7 @@ qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
{
virQEMUDriverPtr driver = dom->conn->privateData;
virQEMUDriverConfigPtr cfg = NULL;
int compressed = QEMU_SAVE_FORMAT_RAW;
int compressed;
virDomainObjPtr vm;
char *name = NULL;
int ret = -1;
@ -3418,21 +3426,9 @@ qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
}
cfg = virQEMUDriverGetConfig(driver);
if (cfg->saveImageFormat) {
compressed = qemuSaveCompressionTypeFromString(cfg->saveImageFormat);
if (compressed < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Invalid save image format specified "
"in configuration file"));
goto cleanup;
}
if (!qemuCompressProgramAvailable(compressed)) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Compression program for image format "
"in configuration file isn't available"));
goto cleanup;
}
}
if ((compressed = qemuGetCompressionProgram(cfg->saveImageFormat,
"save", false)) < 0)
goto cleanup;
if (!(name = qemuDomainManagedSavePath(driver, vm)))
goto cleanup;
@ -3593,7 +3589,7 @@ doCoreDump(virQEMUDriverPtr driver,
/* We reuse "save" flag for "dump" here. Then, we can support the same
* format in "save" and "dump". */
compress = qemuGetCompressionProgram(cfg->dumpImageFormat, "dump");
compress = qemuGetCompressionProgram(cfg->dumpImageFormat, "dump", true);
/* Create an empty file with appropriate ownership. */
if (dump_flags & VIR_DUMP_BYPASS_CACHE) {
@ -14312,7 +14308,7 @@ qemuDomainSnapshotCreateActiveExternal(virConnectPtr conn,
int thaw = 0; /* 1 if freeze succeeded, -1 if freeze failed */
bool pmsuspended = false;
virQEMUDriverConfigPtr cfg = NULL;
int compressed = QEMU_SAVE_FORMAT_RAW;
int compressed;
/* If quiesce was requested, then issue a freeze command, and a
* counterpart thaw command when it is actually sent to agent.
@ -14373,22 +14369,9 @@ qemuDomainSnapshotCreateActiveExternal(virConnectPtr conn,
JOB_MASK(QEMU_JOB_MIGRATION_OP)));
cfg = virQEMUDriverGetConfig(driver);
if (cfg->snapshotImageFormat) {
compressed = qemuSaveCompressionTypeFromString(cfg->snapshotImageFormat);
if (compressed < 0) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Invalid snapshot image format specified "
"in configuration file"));
goto cleanup;
}
if (!qemuCompressProgramAvailable(compressed)) {
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
_("Compression program for image format "
"in configuration file isn't available"));
goto cleanup;
}
}
if ((compressed = qemuGetCompressionProgram(cfg->snapshotImageFormat,
"snapshot", false)) < 0)
goto cleanup;
if (!(xml = qemuDomainDefFormatLive(driver, vm->def, true, true)))
goto cleanup;