[PATCH 7/7] conf: Store 'origstates' of PCI hostdevs in a bitmap
Peter Krempa
pkrempa at redhat.com
Thu Feb 2 15:18:10 UTC 2023
Refactor the code to use a bitmap with an enum to avoid ugly XML parser.
Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
src/conf/domain_conf.c | 97 ++++++++++++++++++-------------------
src/conf/domain_conf.h | 31 ++++--------
src/conf/virconftypes.h | 2 -
src/hypervisor/virhostdev.c | 25 ++++++----
4 files changed, 72 insertions(+), 83 deletions(-)
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 6e33a4472f..b21efeacf9 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -1061,6 +1061,14 @@ VIR_ENUM_IMPL(virDomainHostdevSubsysSCSIProtocol,
"iscsi",
);
+
+VIR_ENUM_IMPL(virDomainHostdevPCIOrigstate,
+ VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_LAST,
+ "unbind",
+ "removeslot",
+ "reprobe",
+);
+
VIR_ENUM_IMPL(virDomainHostdevSubsysUSBGuestReset,
VIR_DOMAIN_HOSTDEV_USB_GUEST_RESET_LAST,
"default",
@@ -3365,8 +3373,10 @@ void virDomainHostdevDefClear(virDomainHostdevDef *def)
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI_HOST:
VIR_FREE(def->source.subsys.u.scsi_host.wwpn);
break;
- case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI:
+ virBitmapFree(def->source.subsys.u.pci.origstates);
+ break;
+ case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV:
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_LAST:
break;
@@ -5731,41 +5741,6 @@ virDomainHostdevSubsysUSBDefParseXML(xmlNodePtr node,
return 0;
}
-/* The internal XML for host PCI device's original states:
- *
- * <origstates>
- * <unbind/>
- * <removeslot/>
- * <reprobe/>
- * </origstates>
- */
-static int
-virDomainHostdevSubsysPCIOrigStatesDefParseXML(xmlNodePtr node,
- virDomainHostdevOrigStates *def)
-{
- xmlNodePtr cur;
- cur = node->children;
-
- while (cur != NULL) {
- if (cur->type == XML_ELEMENT_NODE) {
- if (virXMLNodeNameEqual(cur, "unbind")) {
- def->states.pci.unbind_from_stub = true;
- } else if (virXMLNodeNameEqual(cur, "removeslot")) {
- def->states.pci.remove_slot = true;
- } else if (virXMLNodeNameEqual(cur, "reprobe")) {
- def->states.pci.reprobe = true;
- } else {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("unsupported element '%s' of 'origstates'"),
- cur->name);
- return -1;
- }
- }
- cur = cur->next;
- }
-
- return 0;
-}
static int
virDomainHostdevSubsysPCIDefParseXML(xmlNodePtr node,
@@ -5774,7 +5749,6 @@ virDomainHostdevSubsysPCIDefParseXML(xmlNodePtr node,
unsigned int flags)
{
xmlNodePtr address = NULL;
- xmlNodePtr origstates = NULL;
VIR_XPATH_NODE_AUTORESTORE(ctxt)
ctxt->node = node;
@@ -5788,10 +5762,35 @@ virDomainHostdevSubsysPCIDefParseXML(xmlNodePtr node,
virPCIDeviceAddressParseXML(address, &def->source.subsys.u.pci.addr) < 0)
return -1;
- if ((flags & VIR_DOMAIN_DEF_PARSE_PCI_ORIG_STATES) &&
- (origstates = virXPathNode("./origstates", ctxt)) &&
- virDomainHostdevSubsysPCIOrigStatesDefParseXML(origstates, &def->origstates) < 0)
- return -1;
+ if ((flags & VIR_DOMAIN_DEF_PARSE_PCI_ORIG_STATES)) {
+ virDomainHostdevSubsysPCI *pcisrc = &def->source.subsys.u.pci;
+ g_autofree xmlNodePtr *nodes = NULL;
+ ssize_t nnodes;
+ size_t i;
+
+ if ((nnodes = virXPathNodeSet("./origstates/*", ctxt, &nodes)) < 0)
+ return -1;
+
+ if (nnodes > 0) {
+ if (!pcisrc->origstates)
+ pcisrc->origstates = virBitmapNew(VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_LAST);
+ else
+ virBitmapClearAll(pcisrc->origstates);
+
+ for (i = 0; i < nnodes; i++) {
+ int state;
+
+ if ((state = virDomainHostdevPCIOrigstateTypeFromString((const char *) nodes[i]->name)) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("unsupported element '%s' of 'origstates'"),
+ (const char *) nodes[i]->name);
+ return -1;
+ }
+
+ virBitmapSetBitExpand(pcisrc->origstates, state);
+ }
+ }
+ }
return 0;
}
@@ -23154,7 +23153,6 @@ virDomainHostdevDefFormatSubsysPCI(virBuffer *buf,
{
g_auto(virBuffer) sourceAttrBuf = VIR_BUFFER_INITIALIZER;
g_auto(virBuffer) sourceChildBuf = VIR_BUFFER_INIT_CHILD(buf);
- g_auto(virBuffer) origstatesChildBuf = VIR_BUFFER_INIT_CHILD(&sourceChildBuf);
virDomainHostdevSubsysPCI *pcisrc = &def->source.subsys.u.pci;
if (def->writeFiltering != VIR_TRISTATE_BOOL_ABSENT)
@@ -23176,15 +23174,14 @@ virDomainHostdevDefFormatSubsysPCI(virBuffer *buf,
virPCIDeviceAddressFormat(&sourceChildBuf, pcisrc->addr, includeTypeInAddr);
- if ((flags & VIR_DOMAIN_DEF_FORMAT_PCI_ORIG_STATES)) {
- if (def->origstates.states.pci.unbind_from_stub)
- virBufferAddLit(&origstatesChildBuf, "<unbind/>\n");
-
- if (def->origstates.states.pci.remove_slot)
- virBufferAddLit(&origstatesChildBuf, "<removeslot/>\n");
+ if (pcisrc->origstates &&
+ (flags & VIR_DOMAIN_DEF_FORMAT_PCI_ORIG_STATES)) {
+ g_auto(virBuffer) origstatesChildBuf = VIR_BUFFER_INIT_CHILD(&sourceChildBuf);
+ ssize_t n = -1;
- if (def->origstates.states.pci.reprobe)
- virBufferAddLit(&origstatesChildBuf, "<reprobe/>\n");
+ while ((n = virBitmapNextSetBit(pcisrc->origstates, n)) >= 0)
+ virBufferAsprintf(&origstatesChildBuf, "<%s/>\n",
+ virDomainHostdevPCIOrigstateTypeToString(n));
virXMLFormatElement(&sourceChildBuf, "origstates", NULL, &origstatesChildBuf);
}
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 1a80399c9c..0bec072478 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -167,28 +167,14 @@ typedef enum {
} virDomainHyperVMode;
VIR_ENUM_DECL(virDomainHyperVMode);
-struct _virDomainHostdevOrigStates {
- union {
- struct {
- /* Does the device need to unbind from stub when
- * reattaching to host?
- */
- bool unbind_from_stub;
-
- /* Does it need to use remove_slot when reattaching
- * the device to host?
- */
- bool remove_slot;
+typedef enum {
+ VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_UNBIND = 0, /* device needs to unbind from stub when reattaching */
+ VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_REMOVESLOT, /* use remove_slot when reattaching */
+ VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_REPROBE, /* reprobe driver for device when reattaching */
- /* Does it need to reprobe driver for the device when
- * reattaching to host?
- */
- bool reprobe;
- } pci;
-
- /* Perhaps 'usb' in future */
- } states;
-};
+ VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_LAST
+} virDomainHostdevPCIOrigstate;
+VIR_ENUM_DECL(virDomainHostdevPCIOrigstate);
struct _virDomainLeaseDef {
char *lockspace;
@@ -262,6 +248,8 @@ struct _virDomainHostdevSubsysUSB {
struct _virDomainHostdevSubsysPCI {
virPCIDeviceAddress addr; /* host address */
virDomainHostdevSubsysPCIBackendType backend;
+
+ virBitmap *origstates;
};
struct _virDomainHostdevSubsysSCSIHost {
@@ -394,7 +382,6 @@ struct _virDomainHostdevDef {
virDomainHostdevSubsys subsys;
virDomainHostdevCaps caps;
} source;
- virDomainHostdevOrigStates origstates;
virDomainNetTeamingInfo *teaming;
virDomainDeviceInfo *info; /* Guest address */
};
diff --git a/src/conf/virconftypes.h b/src/conf/virconftypes.h
index d03d1d132e..e07f967814 100644
--- a/src/conf/virconftypes.h
+++ b/src/conf/virconftypes.h
@@ -116,8 +116,6 @@ typedef struct _virDomainHostdevCaps virDomainHostdevCaps;
typedef struct _virDomainHostdevDef virDomainHostdevDef;
-typedef struct _virDomainHostdevOrigStates virDomainHostdevOrigStates;
-
typedef struct _virDomainHostdevSubsys virDomainHostdevSubsys;
typedef struct _virDomainHostdevSubsysMediatedDev virDomainHostdevSubsysMediatedDev;
diff --git a/src/hypervisor/virhostdev.c b/src/hypervisor/virhostdev.c
index c0ce867596..bc5a20d691 100644
--- a/src/hypervisor/virhostdev.c
+++ b/src/hypervisor/virhostdev.c
@@ -873,12 +873,18 @@ virHostdevPreparePCIDevicesImpl(virHostdevManager *mgr,
if (actual) {
VIR_DEBUG("Saving network configuration of PCI device %s",
virPCIDeviceGetName(actual));
- hostdev->origstates.states.pci.unbind_from_stub =
- virPCIDeviceGetUnbindFromStub(actual);
- hostdev->origstates.states.pci.remove_slot =
- virPCIDeviceGetRemoveSlot(actual);
- hostdev->origstates.states.pci.reprobe =
- virPCIDeviceGetReprobe(actual);
+
+ if (!pcisrc->origstates)
+ pcisrc->origstates = virBitmapNew(VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_LAST);
+ else
+ virBitmapClearAll(pcisrc->origstates);
+
+ if (virPCIDeviceGetUnbindFromStub(actual))
+ virBitmapSetBitExpand(pcisrc->origstates, VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_UNBIND);
+ if (virPCIDeviceGetRemoveSlot(actual))
+ virBitmapSetBitExpand(pcisrc->origstates, VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_REMOVESLOT);
+ if (virPCIDeviceGetReprobe(actual))
+ virBitmapSetBitExpand(pcisrc->origstates, VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_REPROBE);
}
}
@@ -1132,6 +1138,7 @@ virHostdevUpdateActivePCIDevices(virHostdevManager *mgr,
for (i = 0; i < nhostdevs; i++) {
const virDomainHostdevDef *hostdev = hostdevs[i];
g_autoptr(virPCIDevice) actual = NULL;
+ virBitmap *orig = hostdev->source.subsys.u.pci.origstates;
if (virHostdevGetPCIHostDevice(hostdev, &actual) < 0)
goto cleanup;
@@ -1143,9 +1150,9 @@ virHostdevUpdateActivePCIDevices(virHostdevManager *mgr,
goto cleanup;
/* Setup the original states for the PCI device */
- virPCIDeviceSetUnbindFromStub(actual, hostdev->origstates.states.pci.unbind_from_stub);
- virPCIDeviceSetRemoveSlot(actual, hostdev->origstates.states.pci.remove_slot);
- virPCIDeviceSetReprobe(actual, hostdev->origstates.states.pci.reprobe);
+ virPCIDeviceSetUnbindFromStub(actual, virBitmapIsBitSet(orig, VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_UNBIND));
+ virPCIDeviceSetRemoveSlot(actual, virBitmapIsBitSet(orig, VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_REMOVESLOT));
+ virPCIDeviceSetReprobe(actual, virBitmapIsBitSet(orig, VIR_DOMAIN_HOSTDEV_PCI_ORIGSTATE_REPROBE));
if (virPCIDeviceListAdd(mgr->activePCIHostdevs, actual) < 0)
goto cleanup;
--
2.39.1
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