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90eee87569
The qemu_domain.c file is big as is and we should split it into separate semantic blocks. Start with code that handles domain namespaces. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
685 lines
20 KiB
C
685 lines
20 KiB
C
/*
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* qemu_security.c: QEMU security management
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*
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* Copyright (C) 2016 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include "qemu_domain.h"
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#include "qemu_namespace.h"
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#include "qemu_security.h"
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#include "virlog.h"
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#define VIR_FROM_THIS VIR_FROM_QEMU
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VIR_LOG_INIT("qemu.qemu_security");
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int
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qemuSecuritySetAllLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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const char *incomingPath,
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bool migrated)
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{
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int ret = -1;
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerSetAllLabel(driver->securityManager,
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vm->def,
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incomingPath,
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priv->chardevStdioLogd,
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migrated) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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void
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qemuSecurityRestoreAllLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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bool migrated)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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bool transactionStarted = false;
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/* In contrast to qemuSecuritySetAllLabel, do not use vm->pid
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* here. This function is called from qemuProcessStop() which
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* is meant to do cleanup after qemu process died. The
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* domain's namespace is gone as qemu was the only process
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* running there. We would not succeed in entering the
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* namespace then. */
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if (virSecurityManagerTransactionStart(driver->securityManager) >= 0)
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transactionStarted = true;
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virSecurityManagerRestoreAllLabel(driver->securityManager,
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vm->def,
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migrated,
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priv->chardevStdioLogd);
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if (transactionStarted &&
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virSecurityManagerTransactionCommit(driver->securityManager,
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-1, priv->rememberOwner) < 0)
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VIR_WARN("Unable to run security manager transaction");
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virSecurityManagerTransactionAbort(driver->securityManager);
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}
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int
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qemuSecuritySetImageLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virStorageSourcePtr src,
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bool backingChain,
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bool chainTop)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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int ret = -1;
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virSecurityDomainImageLabelFlags labelFlags = 0;
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if (backingChain)
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labelFlags |= VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN;
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if (chainTop)
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labelFlags |= VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerSetImageLabel(driver->securityManager,
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vm->def, src, labelFlags) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecurityRestoreImageLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virStorageSourcePtr src,
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bool backingChain)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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int ret = -1;
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virSecurityDomainImageLabelFlags labelFlags = 0;
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if (backingChain)
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labelFlags |= VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerRestoreImageLabel(driver->securityManager,
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vm->def, src, labelFlags) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecurityMoveImageMetadata(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virStorageSourcePtr src,
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virStorageSourcePtr dst)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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if (!priv->rememberOwner)
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return 0;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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return virSecurityManagerMoveImageMetadata(driver->securityManager, pid, src, dst);
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}
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int
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qemuSecuritySetHostdevLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainHostdevDefPtr hostdev)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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int ret = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerSetHostdevLabel(driver->securityManager,
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vm->def,
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hostdev,
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NULL) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecurityRestoreHostdevLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainHostdevDefPtr hostdev)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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int ret = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerRestoreHostdevLabel(driver->securityManager,
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vm->def,
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hostdev,
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NULL) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecuritySetMemoryLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainMemoryDefPtr mem)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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int ret = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerSetMemoryLabel(driver->securityManager,
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vm->def,
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mem) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecurityRestoreMemoryLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainMemoryDefPtr mem)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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int ret = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerRestoreMemoryLabel(driver->securityManager,
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vm->def,
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mem) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecuritySetInputLabel(virDomainObjPtr vm,
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virDomainInputDefPtr input)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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virQEMUDriverPtr driver = priv->driver;
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pid_t pid = -1;
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int ret = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerSetInputLabel(driver->securityManager,
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vm->def,
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input) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecurityRestoreInputLabel(virDomainObjPtr vm,
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virDomainInputDefPtr input)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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virQEMUDriverPtr driver = priv->driver;
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pid_t pid = -1;
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int ret = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerRestoreInputLabel(driver->securityManager,
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vm->def,
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input) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecuritySetChardevLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainChrDefPtr chr)
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{
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int ret = -1;
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerSetChardevLabel(driver->securityManager,
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vm->def,
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chr->source,
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priv->chardevStdioLogd) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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int
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qemuSecurityRestoreChardevLabel(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virDomainChrDefPtr chr)
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{
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int ret = -1;
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qemuDomainObjPrivatePtr priv = vm->privateData;
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pid_t pid = -1;
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if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
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pid = vm->pid;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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goto cleanup;
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if (virSecurityManagerRestoreChardevLabel(driver->securityManager,
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vm->def,
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chr->source,
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priv->chardevStdioLogd) < 0)
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goto cleanup;
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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pid, priv->rememberOwner) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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/*
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* qemuSecurityStartVhostUserGPU:
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*
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* @driver: the QEMU driver
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* @vm: the domain object
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* @cmd: the command to run
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* @existstatus: pointer to int returning exit status of process
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* @cmdret: pointer to int returning result of virCommandRun
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*
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* Start the vhost-user-gpu process with appropriate labels.
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* This function returns -1 on security setup error, 0 if all the
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* setup was done properly. In case the virCommand failed to run
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* 0 is returned but cmdret is set appropriately with the process
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* exitstatus also set.
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*/
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int
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qemuSecurityStartVhostUserGPU(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virCommandPtr cmd,
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int *exitstatus,
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int *cmdret)
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{
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if (virSecurityManagerSetChildProcessLabel(driver->securityManager,
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vm->def, cmd) < 0)
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return -1;
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if (virSecurityManagerPreFork(driver->securityManager) < 0)
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return -1;
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*cmdret = virCommandRun(cmd, exitstatus);
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virSecurityManagerPostFork(driver->securityManager);
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if (*cmdret < 0)
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return -1;
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return 0;
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}
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/*
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* qemuSecurityStartTPMEmulator:
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*
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* @driver: the QEMU driver
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* @vm: the domain object
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* @cmd: the command to run
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* @uid: the uid to run the emulator
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* @gid: the gid to run the emulator
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* @existstatus: pointer to int returning exit status of process
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* @cmdret: pointer to int returning result of virCommandRun
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*
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* Start the TPM emulator with appropriate labels. Apply security
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* labels to files first.
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* This function returns -1 on security setup error, 0 if all the
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* setup was done properly. In case the virCommand failed to run
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* 0 is returned but cmdret is set appropriately with the process
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* exitstatus also set.
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*/
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int
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qemuSecurityStartTPMEmulator(virQEMUDriverPtr driver,
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virDomainObjPtr vm,
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virCommandPtr cmd,
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uid_t uid,
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gid_t gid,
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int *exitstatus,
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int *cmdret)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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int ret = -1;
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bool transactionStarted = false;
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if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
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return -1;
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transactionStarted = true;
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if (virSecurityManagerSetTPMLabels(driver->securityManager,
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vm->def) < 0) {
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virSecurityManagerTransactionAbort(driver->securityManager);
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return -1;
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}
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if (virSecurityManagerTransactionCommit(driver->securityManager,
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-1, priv->rememberOwner) < 0)
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goto cleanup_abort;
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transactionStarted = false;
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if (qemuSecurityCommandRun(driver, vm, cmd, uid, gid, exitstatus, cmdret) < 0)
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goto cleanup;
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ret = 0;
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if (*cmdret < 0)
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goto cleanup;
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return 0;
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cleanup:
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if (!transactionStarted &&
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virSecurityManagerTransactionStart(driver->securityManager) >= 0)
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transactionStarted = true;
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virSecurityManagerRestoreTPMLabels(driver->securityManager, vm->def);
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if (transactionStarted &&
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virSecurityManagerTransactionCommit(driver->securityManager,
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-1, priv->rememberOwner) < 0)
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VIR_WARN("Unable to run security manager transaction");
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cleanup_abort:
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virSecurityManagerTransactionAbort(driver->securityManager);
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return ret;
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}
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|
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|
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void
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qemuSecurityCleanupTPMEmulator(virQEMUDriverPtr driver,
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virDomainObjPtr vm)
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{
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qemuDomainObjPrivatePtr priv = vm->privateData;
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bool transactionStarted = false;
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if (virSecurityManagerTransactionStart(driver->securityManager) >= 0)
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transactionStarted = true;
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virSecurityManagerRestoreTPMLabels(driver->securityManager, vm->def);
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if (transactionStarted &&
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virSecurityManagerTransactionCommit(driver->securityManager,
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-1, priv->rememberOwner) < 0)
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VIR_WARN("Unable to run security manager transaction");
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virSecurityManagerTransactionAbort(driver->securityManager);
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}
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int
|
|
qemuSecurityDomainSetPathLabel(virQEMUDriverPtr driver,
|
|
virDomainObjPtr vm,
|
|
const char *path,
|
|
bool allowSubtree)
|
|
{
|
|
qemuDomainObjPrivatePtr priv = vm->privateData;
|
|
pid_t pid = -1;
|
|
int ret = -1;
|
|
|
|
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
|
|
pid = vm->pid;
|
|
|
|
if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
|
|
goto cleanup;
|
|
|
|
if (virSecurityManagerDomainSetPathLabel(driver->securityManager,
|
|
vm->def,
|
|
path,
|
|
allowSubtree) < 0)
|
|
goto cleanup;
|
|
|
|
if (virSecurityManagerTransactionCommit(driver->securityManager,
|
|
pid, priv->rememberOwner) < 0)
|
|
goto cleanup;
|
|
|
|
ret = 0;
|
|
cleanup:
|
|
virSecurityManagerTransactionAbort(driver->securityManager);
|
|
return ret;
|
|
}
|
|
|
|
|
|
int
|
|
qemuSecurityDomainRestorePathLabel(virQEMUDriverPtr driver,
|
|
virDomainObjPtr vm,
|
|
const char *path)
|
|
{
|
|
qemuDomainObjPrivatePtr priv = vm->privateData;
|
|
pid_t pid = -1;
|
|
int ret = -1;
|
|
|
|
if (qemuDomainNamespaceEnabled(vm, QEMU_DOMAIN_NS_MOUNT))
|
|
pid = vm->pid;
|
|
|
|
if (virSecurityManagerTransactionStart(driver->securityManager) < 0)
|
|
goto cleanup;
|
|
|
|
if (virSecurityManagerDomainRestorePathLabel(driver->securityManager,
|
|
vm->def,
|
|
path) < 0)
|
|
goto cleanup;
|
|
|
|
if (virSecurityManagerTransactionCommit(driver->securityManager,
|
|
pid, priv->rememberOwner) < 0)
|
|
goto cleanup;
|
|
|
|
ret = 0;
|
|
cleanup:
|
|
virSecurityManagerTransactionAbort(driver->securityManager);
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* qemuSecurityCommandRun:
|
|
* @driver: the QEMU driver
|
|
* @vm: the domain object
|
|
* @cmd: the command to run
|
|
* @uid: the uid to force
|
|
* @gid: the gid to force
|
|
* @existstatus: pointer to int returning exit status of process
|
|
* @cmdret: pointer to int returning result of virCommandRun
|
|
*
|
|
* Run @cmd with seclabels set on it. If @uid and/or @gid are not
|
|
* -1 then their value is enforced.
|
|
*
|
|
* Returns: 0 on success,
|
|
* -1 otherwise.
|
|
*/
|
|
int
|
|
qemuSecurityCommandRun(virQEMUDriverPtr driver,
|
|
virDomainObjPtr vm,
|
|
virCommandPtr cmd,
|
|
uid_t uid,
|
|
gid_t gid,
|
|
int *exitstatus,
|
|
int *cmdret)
|
|
{
|
|
if (virSecurityManagerSetChildProcessLabel(driver->securityManager,
|
|
vm->def, cmd) < 0)
|
|
return -1;
|
|
|
|
if (uid != (uid_t) -1)
|
|
virCommandSetUID(cmd, uid);
|
|
if (gid != (gid_t) -1)
|
|
virCommandSetGID(cmd, gid);
|
|
|
|
if (virSecurityManagerPreFork(driver->securityManager) < 0)
|
|
return -1;
|
|
|
|
*cmdret = virCommandRun(cmd, exitstatus);
|
|
|
|
virSecurityManagerPostFork(driver->securityManager);
|
|
|
|
return 0;
|
|
}
|