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qemu: functions for dealing with input device namespaces and labels 

Introudce functions that will let us create the evdevs in namespaces
and label the devices on input device hotplug/hotunplug.
This commit is contained in:
Ján Tomko 2017-11-21 13:55:12 +01:00
parent f29612fd35
commit c4c7a18c4b
4 changed files with 142 additions and 0 deletions
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72
src/qemu/qemu_domain.c
View File

@ -10061,6 +10061,78 @@ qemuDomainNamespaceTeardownRNG(virQEMUDriverPtr driver,
}
int
qemuDomainNamespaceSetupInput(virDomainObjPtr vm,
virDomainInputDefPtr input)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverPtr driver = priv->driver;
virQEMUDriverConfigPtr cfg = NULL;
char **devMountsPath = NULL;
size_t ndevMountsPath = 0;
const char *path = NULL;
int ret = -1;
if (!(path = virDomainInputDefGetPath(input)))
return 0;
if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
return 0;
cfg = virQEMUDriverGetConfig(driver);
if (qemuDomainGetPreservedMounts(cfg, vm,
&devMountsPath, NULL,
&ndevMountsPath) < 0)
goto cleanup;
if (qemuDomainAttachDeviceMknod(driver, vm, path,
devMountsPath, ndevMountsPath) < 0)
goto cleanup;
ret = 0;
cleanup:
virStringListFreeCount(devMountsPath, ndevMountsPath);
virObjectUnref(cfg);
return ret;
}
int
qemuDomainNamespaceTeardownInput(virDomainObjPtr vm,
virDomainInputDefPtr input)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverPtr driver = priv->driver;
virQEMUDriverConfigPtr cfg = NULL;
char **devMountsPath = NULL;
size_t ndevMountsPath = 0;
const char *path = NULL;
int ret = -1;
if (!(path = virDomainInputDefGetPath(input)))
return 0;
if (!qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
return 0;
cfg = virQEMUDriverGetConfig(driver);
if (qemuDomainGetPreservedMounts(cfg, vm,
&devMountsPath, NULL,
&ndevMountsPath) < 0)
goto cleanup;
if (qemuDomainDetachDeviceUnlink(driver, vm, path,
devMountsPath, ndevMountsPath) < 0)
goto cleanup;
ret = 0;
cleanup:
virStringListFreeCount(devMountsPath, ndevMountsPath);
virObjectUnref(cfg);
return ret;
}
/**
* qemuDomainDiskLookupByNodename:
* @def: domain definition to look for the disk

6
src/qemu/qemu_domain.h
View File

@ -959,6 +959,12 @@ int qemuDomainNamespaceTeardownRNG(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainRNGDefPtr rng);
int qemuDomainNamespaceSetupInput(virDomainObjPtr vm,
virDomainInputDefPtr input);
int qemuDomainNamespaceTeardownInput(virDomainObjPtr vm,
virDomainInputDefPtr input);
virDomainDiskDefPtr qemuDomainDiskLookupByNodename(virDomainDefPtr def,
const char *nodename,
virStorageSourcePtr *src,

58
src/qemu/qemu_security.c
View File

@ -306,3 +306,61 @@ qemuSecurityRestoreMemoryLabel(virQEMUDriverPtr driver,
virSecurityManagerTransactionAbort(driver->securityManager);
return ret;
}
int
qemuSecuritySetInputLabel(virDomainObjPtr vm,
virDomainInputDefPtr input)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverPtr driver = priv->driver;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
virSecurityManagerTransactionStart(driver->securityManager) < 0)
goto cleanup;
if (virSecurityManagerSetInputLabel(driver->securityManager,
vm->def,
input) < 0)
goto cleanup;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
virSecurityManagerTransactionCommit(driver->securityManager,
vm->pid) < 0)
goto cleanup;
ret = 0;
cleanup:
virSecurityManagerTransactionAbort(driver->securityManager);
return ret;
}
int
qemuSecurityRestoreInputLabel(virDomainObjPtr vm,
virDomainInputDefPtr input)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
virQEMUDriverPtr driver = priv->driver;
int ret = -1;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
virSecurityManagerTransactionStart(driver->securityManager) < 0)
goto cleanup;
if (virSecurityManagerRestoreInputLabel(driver->securityManager,
vm->def,
input) < 0)
goto cleanup;
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT) &&
virSecurityManagerTransactionCommit(driver->securityManager,
vm->pid) < 0)
goto cleanup;
ret = 0;
cleanup:
virSecurityManagerTransactionAbort(driver->securityManager);
return ret;
}

6
src/qemu/qemu_security.h
View File

@ -70,6 +70,12 @@ int qemuSecurityRestoreMemoryLabel(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virDomainMemoryDefPtr mem);
int qemuSecuritySetInputLabel(virDomainObjPtr vm,
virDomainInputDefPtr input);
int qemuSecurityRestoreInputLabel(virDomainObjPtr vm,
virDomainInputDefPtr input);
/* Please note that for these APIs there is no wrapper yet. Do NOT blindly add
* new APIs here. If an API can touch a /dev file add a proper wrapper instead.
*/