[libvirt] [PATCH] conf: Allow for non-contiguous device boot orders
Peter Krempa
pkrempa at redhat.com
Thu Apr 4 13:35:57 UTC 2013
This patch adds the ability to configure non-contiguous boot orders on boot
devices. This allows unplugging devices that have boot order specified without
breaking migration.
The new code now uses a slightly less memory efficient approach to store the
boot order fields in a hashtable instead of a bitmap.
---
src/conf/domain_conf.c | 66 ++++++++++++++++++++++++--------------------------
1 file changed, 32 insertions(+), 34 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index cc26f21..80a90e1 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -2876,7 +2876,7 @@ cleanup:
static int
virDomainDeviceBootParseXML(xmlNodePtr node,
int *bootIndex,
- virBitmapPtr bootMap)
+ virHashTablePtr bootHash)
{
char *order;
int boot;
@@ -2895,18 +2895,19 @@ virDomainDeviceBootParseXML(xmlNodePtr node,
goto cleanup;
}
- if (bootMap) {
- bool set;
- if (virBitmapGetBit(bootMap, boot - 1, &set) < 0) {
- virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
- _("boot orders have to be contiguous and starting from 1"));
+ if (bootHash) {
+ if (virHashLookup(bootHash, order)) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+ _("boot order '%s' used for more than one device"),
+ order);
goto cleanup;
- } else if (set) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("boot order %d used for more than one device"), boot);
+ }
+
+ if (virHashAddEntry(bootHash, order, (void *) 1) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("Failed to add element to boot order hash"));
goto cleanup;
}
- ignore_value(virBitmapSetBit(bootMap, boot - 1));
}
*bootIndex = boot;
@@ -2922,7 +2923,7 @@ cleanup:
*/
static int
virDomainDeviceInfoParseXML(xmlNodePtr node,
- virBitmapPtr bootMap,
+ virHashTablePtr bootHash,
virDomainDeviceInfoPtr info,
unsigned int flags)
{
@@ -2973,7 +2974,7 @@ virDomainDeviceInfoParseXML(xmlNodePtr node,
}
if (boot) {
- if (virDomainDeviceBootParseXML(boot, &info->bootIndex, bootMap))
+ if (virDomainDeviceBootParseXML(boot, &info->bootIndex, bootHash))
goto cleanup;
}
@@ -3945,7 +3946,7 @@ static virDomainDiskDefPtr
virDomainDiskDefParseXML(virCapsPtr caps,
xmlNodePtr node,
xmlXPathContextPtr ctxt,
- virBitmapPtr bootMap,
+ virHashTablePtr bootHash,
virSecurityLabelDefPtr* vmSeclabels,
int nvmSeclabels,
unsigned int flags)
@@ -4660,7 +4661,7 @@ virDomainDiskDefParseXML(virCapsPtr caps,
}
def->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
} else {
- if (virDomainDeviceInfoParseXML(node, bootMap, &def->info,
+ if (virDomainDeviceInfoParseXML(node, bootHash, &def->info,
flags | VIR_DOMAIN_XML_INTERNAL_ALLOW_BOOT) < 0)
goto error;
}
@@ -5318,7 +5319,7 @@ static virDomainNetDefPtr
virDomainNetDefParseXML(virCapsPtr caps,
xmlNodePtr node,
xmlXPathContextPtr ctxt,
- virBitmapPtr bootMap,
+ virHashTablePtr bootHash,
unsigned int flags)
{
virDomainNetDefPtr def;
@@ -5513,7 +5514,7 @@ virDomainNetDefParseXML(virCapsPtr caps,
}
def->info.type = VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI;
} else {
- if (virDomainDeviceInfoParseXML(node, bootMap, &def->info,
+ if (virDomainDeviceInfoParseXML(node, bootHash, &def->info,
flags | VIR_DOMAIN_XML_INTERNAL_ALLOW_BOOT
| VIR_DOMAIN_XML_INTERNAL_ALLOW_ROM) < 0)
goto error;
@@ -7988,7 +7989,7 @@ error:
static virDomainHostdevDefPtr
virDomainHostdevDefParseXML(const xmlNodePtr node,
xmlXPathContextPtr ctxt,
- virBitmapPtr bootMap,
+ virHashTablePtr bootHash,
unsigned int flags)
{
virDomainHostdevDefPtr def;
@@ -8029,7 +8030,7 @@ virDomainHostdevDefParseXML(const xmlNodePtr node,
}
if (def->info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE) {
- if (virDomainDeviceInfoParseXML(node, bootMap, def->info,
+ if (virDomainDeviceInfoParseXML(node, bootHash, def->info,
flags | VIR_DOMAIN_XML_INTERNAL_ALLOW_BOOT
| VIR_DOMAIN_XML_INTERNAL_ALLOW_ROM) < 0)
goto error;
@@ -8063,7 +8064,7 @@ error:
static virDomainRedirdevDefPtr
virDomainRedirdevDefParseXML(const xmlNodePtr node,
- virBitmapPtr bootMap,
+ virHashTablePtr bootHash,
unsigned int flags)
{
xmlNodePtr cur;
@@ -8113,7 +8114,7 @@ virDomainRedirdevDefParseXML(const xmlNodePtr node,
def->source.chr.data.spicevmc = VIR_DOMAIN_CHR_SPICEVMC_USBREDIR;
}
- if (virDomainDeviceInfoParseXML(node, bootMap, &def->info,
+ if (virDomainDeviceInfoParseXML(node, bootHash, &def->info,
flags | VIR_DOMAIN_XML_INTERNAL_ALLOW_BOOT) < 0)
goto error;
@@ -9098,8 +9099,7 @@ static char *virDomainDefDefaultEmulator(virDomainDefPtr def,
static int
virDomainDefParseBootXML(xmlXPathContextPtr ctxt,
- virDomainDefPtr def,
- unsigned long *bootCount)
+ virDomainDefPtr def)
{
xmlNodePtr *nodes = NULL;
int i, n;
@@ -9196,7 +9196,6 @@ virDomainDefParseBootXML(xmlXPathContextPtr ctxt,
def->os.bios.rt_set = true;
}
- *bootCount = deviceBoot;
ret = 0;
cleanup:
@@ -9394,8 +9393,7 @@ virDomainDefParseXML(virCapsPtr caps,
virDomainDefPtr def;
unsigned long count;
bool uuid_generated = false;
- virBitmapPtr bootMap = NULL;
- unsigned long bootMapSize = 0;
+ virHashTablePtr bootHash = NULL;
xmlNodePtr cur;
bool usb_none = false;
bool usb_other = false;
@@ -10289,10 +10287,10 @@ virDomainDefParseXML(virCapsPtr caps,
}
if (STREQ(def->os.type, "hvm")) {
- if (virDomainDefParseBootXML(ctxt, def, &bootMapSize) < 0)
+ if (virDomainDefParseBootXML(ctxt, def) < 0)
+ goto error;
+ if (!(bootHash = virHashCreate(5, NULL)))
goto error;
- if (bootMapSize && !(bootMap = virBitmapNew(bootMapSize)))
- goto no_memory;
}
def->emulator = virXPathString("string(./devices/emulator[1])", ctxt);
@@ -10313,7 +10311,7 @@ virDomainDefParseXML(virCapsPtr caps,
virDomainDiskDefPtr disk = virDomainDiskDefParseXML(caps,
nodes[i],
ctxt,
- bootMap,
+ bootHash,
def->seclabels,
def->nseclabels,
flags);
@@ -10413,7 +10411,7 @@ virDomainDefParseXML(virCapsPtr caps,
virDomainNetDefPtr net = virDomainNetDefParseXML(caps,
nodes[i],
ctxt,
- bootMap,
+ bootHash,
flags);
if (!net)
goto error;
@@ -10796,7 +10794,7 @@ virDomainDefParseXML(virCapsPtr caps,
for (i = 0 ; i < n ; i++) {
virDomainHostdevDefPtr hostdev;
- hostdev = virDomainHostdevDefParseXML(nodes[i], ctxt, bootMap, flags);
+ hostdev = virDomainHostdevDefParseXML(nodes[i], ctxt, bootHash, flags);
if (!hostdev)
goto error;
@@ -10912,7 +10910,7 @@ virDomainDefParseXML(virCapsPtr caps,
goto no_memory;
for (i = 0 ; i < n ; i++) {
virDomainRedirdevDefPtr redirdev = virDomainRedirdevDefParseXML(nodes[i],
- bootMap,
+ bootHash,
flags);
if (!redirdev)
goto error;
@@ -11029,7 +11027,7 @@ virDomainDefParseXML(virCapsPtr caps,
if (virDomainDefAddImplicitControllers(def) < 0)
goto error;
- virBitmapFree(bootMap);
+ virHashFree(bootHash);
return def;
@@ -11038,7 +11036,7 @@ no_memory:
error:
VIR_FREE(tmp);
VIR_FREE(nodes);
- virBitmapFree(bootMap);
+ virHashFree(bootHash);
virDomainDefFree(def);
return NULL;
}
--
1.8.1.5
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