[PATCH 8/9] qemu, libxl, hypervisor: use virDomainDriverNodeDeviceDetachFlags() helper
Daniel Henrique Barboza
danielhb413 at gmail.com
Mon Feb 1 11:46:41 UTC 2021
libxlNodeDeviceDetachFlags() and qemuNodeDeviceDetachFlags() are mostly
equal, aside from how the virHostdevmanager pointer is retrieved and
the PCI stub driver used.
Now that the PCI stub driver verification is done early in both functions,
we can use the virDomainDriverNodeDeviceDetachFlags() helper to reduce
code duplication between them. 'driverName' is checked inside the helper
to set the appropriate stub driver.
Signed-off-by: Daniel Henrique Barboza <danielhb413 at gmail.com>
---
src/hypervisor/domain_driver.c | 60 ++++++++++++++++++++++++++++++++++
src/hypervisor/domain_driver.h | 4 +++
src/libvirt_private.syms | 1 +
src/libxl/libxl_driver.c | 54 ++----------------------------
src/qemu/qemu_driver.c | 49 ++-------------------------
5 files changed, 71 insertions(+), 97 deletions(-)
diff --git a/src/hypervisor/domain_driver.c b/src/hypervisor/domain_driver.c
index ea4c3c9466..6ee74d6dff 100644
--- a/src/hypervisor/domain_driver.c
+++ b/src/hypervisor/domain_driver.c
@@ -459,3 +459,63 @@ virDomainDriverNodeDeviceReAttach(virNodeDevicePtr dev,
return virHostdevPCINodeDeviceReAttach(hostdevMgr, pci);
}
+
+int
+virDomainDriverNodeDeviceDetachFlags(virNodeDevicePtr dev,
+ virHostdevManagerPtr hostdevMgr,
+ const char *driverName)
+{
+ virPCIDevicePtr pci = NULL;
+ virPCIDeviceAddress devAddr;
+ int ret = -1;
+ virNodeDeviceDefPtr def = NULL;
+ g_autofree char *xml = NULL;
+ virConnectPtr nodeconn = NULL;
+ virNodeDevicePtr nodedev = NULL;
+
+ if (!driverName)
+ return -1;
+
+ if (!(nodeconn = virGetConnectNodeDev()))
+ goto cleanup;
+
+ /* 'dev' is associated with virConnectPtr, so for split
+ * daemons, we need to get a copy that is associated with
+ * the virnodedevd daemon. */
+ if (!(nodedev = virNodeDeviceLookupByName(nodeconn,
+ virNodeDeviceGetName(dev))))
+ goto cleanup;
+
+ xml = virNodeDeviceGetXMLDesc(nodedev, 0);
+ if (!xml)
+ goto cleanup;
+
+ def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
+ if (!def)
+ goto cleanup;
+
+ /* ACL check must happen against original 'dev',
+ * not the new 'nodedev' we acquired */
+ if (virNodeDeviceDetachFlagsEnsureACL(dev->conn, def) < 0)
+ goto cleanup;
+
+ if (virDomainDriverNodeDeviceGetPCIInfo(def, &devAddr) < 0)
+ goto cleanup;
+
+ pci = virPCIDeviceNew(&devAddr);
+ if (!pci)
+ goto cleanup;
+
+ if (STREQ(driverName, "vfio"))
+ virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_VFIO);
+ else if (STREQ(driverName, "xen"))
+ virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_XEN);
+
+ ret = virHostdevPCINodeDeviceDetach(hostdevMgr, pci);
+ cleanup:
+ virPCIDeviceFree(pci);
+ virNodeDeviceDefFree(def);
+ virObjectUnref(nodedev);
+ virObjectUnref(nodeconn);
+ return ret;
+}
diff --git a/src/hypervisor/domain_driver.h b/src/hypervisor/domain_driver.h
index 71eed6d5a9..a22a3ee76c 100644
--- a/src/hypervisor/domain_driver.h
+++ b/src/hypervisor/domain_driver.h
@@ -56,3 +56,7 @@ int virDomainDriverNodeDeviceReset(virNodeDevicePtr dev,
int virDomainDriverNodeDeviceReAttach(virNodeDevicePtr dev,
virHostdevManagerPtr hostdevMgr);
+
+int virDomainDriverNodeDeviceDetachFlags(virNodeDevicePtr dev,
+ virHostdevManagerPtr hostdevMgr,
+ const char *driverName);
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index ed01f79106..57622dc9a7 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1503,6 +1503,7 @@ virDomainCgroupSetupMemtune;
virDomainDriverGenerateMachineName;
virDomainDriverGenerateRootHash;
virDomainDriverMergeBlkioDevice;
+virDomainDriverNodeDeviceDetachFlags;
virDomainDriverNodeDeviceGetPCIInfo;
virDomainDriverNodeDeviceReAttach;
virDomainDriverNodeDeviceReset;
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index 7c7eeb3ad0..4fc59b2a7e 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -5779,15 +5779,8 @@ libxlNodeDeviceDetachFlags(virNodeDevicePtr dev,
const char *driverName,
unsigned int flags)
{
- virPCIDevicePtr pci = NULL;
- virPCIDeviceAddress devAddr;
- int ret = -1;
- virNodeDeviceDefPtr def = NULL;
- char *xml = NULL;
libxlDriverPrivatePtr driver = dev->conn->privateData;
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
- virConnectPtr nodeconn = NULL;
- virNodeDevicePtr nodedev = NULL;
virCheckFlags(0, -1);
@@ -5797,50 +5790,9 @@ libxlNodeDeviceDetachFlags(virNodeDevicePtr dev,
return -1;
}
- if (!(nodeconn = virGetConnectNodeDev()))
- goto cleanup;
-
- /* 'dev' is associated with the QEMU virConnectPtr,
- * so for split daemons, we need to get a copy that
- * is associated with the virnodedevd daemon.
- */
- if (!(nodedev = virNodeDeviceLookupByName(nodeconn,
- virNodeDeviceGetName(dev))))
- goto cleanup;
-
- xml = virNodeDeviceGetXMLDesc(nodedev, 0);
- if (!xml)
- goto cleanup;
-
- def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
- if (!def)
- goto cleanup;
-
- /* ACL check must happen against original 'dev',
- * not the new 'nodedev' we acquired */
- if (virNodeDeviceDetachFlagsEnsureACL(dev->conn, def) < 0)
- goto cleanup;
-
- if (virDomainDriverNodeDeviceGetPCIInfo(def, &devAddr) < 0)
- goto cleanup;
-
- pci = virPCIDeviceNew(&devAddr);
- if (!pci)
- goto cleanup;
-
- virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_XEN);
-
- if (virHostdevPCINodeDeviceDetach(hostdev_mgr, pci) < 0)
- goto cleanup;
-
- ret = 0;
- cleanup:
- virPCIDeviceFree(pci);
- virNodeDeviceDefFree(def);
- virObjectUnref(nodedev);
- virObjectUnref(nodeconn);
- VIR_FREE(xml);
- return ret;
+ /* virNodeDeviceDetachFlagsEnsureACL() is being called by
+ * virDomainDriverNodeDeviceDetachFlags() */
+ return virDomainDriverNodeDeviceDetachFlags(dev, hostdev_mgr, driverName);
}
static int
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index c6ba33e4ad..21ce143764 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -11970,15 +11970,8 @@ qemuNodeDeviceDetachFlags(virNodeDevicePtr dev,
unsigned int flags)
{
virQEMUDriverPtr driver = dev->conn->privateData;
- virPCIDevicePtr pci = NULL;
- virPCIDeviceAddress devAddr;
- int ret = -1;
- virNodeDeviceDefPtr def = NULL;
- g_autofree char *xml = NULL;
bool vfio = qemuHostdevHostSupportsPassthroughVFIO();
virHostdevManagerPtr hostdev_mgr = driver->hostdevMgr;
- virConnectPtr nodeconn = NULL;
- virNodeDevicePtr nodedev = NULL;
virCheckFlags(0, -1);
@@ -12001,46 +11994,10 @@ qemuNodeDeviceDetachFlags(virNodeDevicePtr dev,
return -1;
}
- if (!(nodeconn = virGetConnectNodeDev()))
- goto cleanup;
-
- /* 'dev' is associated with the QEMU virConnectPtr,
- * so for split daemons, we need to get a copy that
- * is associated with the virnodedevd daemon.
- */
- if (!(nodedev = virNodeDeviceLookupByName(nodeconn,
- virNodeDeviceGetName(dev))))
- goto cleanup;
-
- xml = virNodeDeviceGetXMLDesc(nodedev, 0);
- if (!xml)
- goto cleanup;
-
- def = virNodeDeviceDefParseString(xml, EXISTING_DEVICE, NULL);
- if (!def)
- goto cleanup;
- /* ACL check must happen against original 'dev',
- * not the new 'nodedev' we acquired */
- if (virNodeDeviceDetachFlagsEnsureACL(dev->conn, def) < 0)
- goto cleanup;
-
- if (virDomainDriverNodeDeviceGetPCIInfo(def, &devAddr) < 0)
- goto cleanup;
-
- pci = virPCIDeviceNew(&devAddr);
- if (!pci)
- goto cleanup;
-
- virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_VFIO);
-
- ret = virHostdevPCINodeDeviceDetach(hostdev_mgr, pci);
- cleanup:
- virPCIDeviceFree(pci);
- virNodeDeviceDefFree(def);
- virObjectUnref(nodedev);
- virObjectUnref(nodeconn);
- return ret;
+ /* virNodeDeviceDetachFlagsEnsureACL() is being called by
+ * virDomainDriverNodeDeviceDetachFlags() */
+ return virDomainDriverNodeDeviceDetachFlags(dev, hostdev_mgr, driverName);
}
static int
--
2.26.2
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